TY - JOUR T1 - Soft nanoparticles: nano ionic networks of associated ionic polymers. AN - 1852680915; 27976769 AB - Directing the formation of nanostructures that serve as building blocks of membranes presents an immense step towards engineering controlled polymeric ion transport systems. Using the exquisite atomic detail captured by molecular dynamics simulations, we follow the assembly of a co-polymer that consists of polystyrene sulfonate tethered symmetrically to hydrophobic blocks, realizing a new type of long lived solvent-responsive soft nanoparticle. JF - Nanoscale AU - Aryal, Dipak AU - Grest, Gary S AU - Perahia, Dvora AD - Department of Chemistry, Clemson University, Clemson, South Carolina 29634, USA. dperahi@g.clemson.edu. ; Sandia National Laboratories, Albuquerque, New Mexico 87185, USA. Y1 - 2017/02/09/ PY - 2017 DA - 2017 Feb 09 SP - 2117 EP - 2122 VL - 9 IS - 6 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1852680915?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nanoscale&rft.atitle=Soft+nanoparticles%3A+nano+ionic+networks+of+associated+ionic+polymers.&rft.au=Aryal%2C+Dipak%3BGrest%2C+Gary+S%3BPerahia%2C+Dvora&rft.aulast=Aryal&rft.aufirst=Dipak&rft.date=2017-02-09&rft.volume=9&rft.issue=6&rft.spage=2117&rft.isbn=&rft.btitle=&rft.title=Nanoscale&rft.issn=2040-3372&rft_id=info:doi/10.1039%2Fc6nr09206c LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-12-15 N1 - Date revised - 2017-02-18 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1039/c6nr09206c ER - TY - JOUR T1 - Estimating the power-law distribution of Earth electrical conductivity from low-frequency, controlled-source electromagnetic responses AN - 1869032730; 2017-010375 AB - Electromagnetic responses reflect the interaction between applied electromagnetic fields and heterogeneous geoelectrical structures. Quantifying the relationship between multiscale electrical properties and the observed electromagnetic response is therefore important for meaningful geologic interpretation. We present here examples of near-surface electromagnetic responses whose spatial fluctuations appear on all length scales, are repeatable and fractally distributed, supporting the notion of a 'rough geology' exhibiting multiscale hierarchical structure. Bounded by end member cases from homogenized isotropic and anisotropic media, we present numerical modelling results of the electromagnetic responses of textured and spatially correlated, stochastic geologic media, demonstrating that the electromagnetic response is a power law distribution, rather than a smooth response polluted with random, incoherent noise as commonly assumed. Our modelling results show that these electromagnetic responses due to spatially correlated geologic textures are examples of fractional Brownian motion. Furthermore, our results suggest that the fractal behaviour of the electromagnetic responses is correlated with degree of the spatial correlation, the contrasts in ground conductivity, and the preferred orientation of small-scale heterogeneity. In addition, the EM responses acquired across a fault zone comprising different lithological units and varying wavelengths of geologic heterogeneity also support our inferences from numerical modelling. JF - Geophysical Journal International AU - Beskardes, G D AU - Weiss, C J AU - Everett, Mark E Y1 - 2017/02// PY - 2017 DA - February 2017 SP - 639 EP - 651 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 208 IS - 2 SN - 0956-540X, 0956-540X KW - United States KW - electrical conductivity KW - power law KW - geophysical surveys KW - Edwards Plateau KW - finite difference analysis KW - electromagnetic methods KW - heterogeneity KW - fractals KW - lineation KW - orientation KW - electrical properties KW - numerical models KW - three-dimensional models KW - numerical analysis KW - roughness KW - geophysical methods KW - Texas KW - controlled-source methods KW - noise KW - physical properties KW - deconvolution KW - surveys KW - foliation KW - electromagnetic field KW - self-similarity KW - fault zones KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869032730?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=Estimating+the+power-law+distribution+of+Earth+electrical+conductivity+from+low-frequency%2C+controlled-source+electromagnetic+responses&rft.au=Beskardes%2C+G+D%3BWeiss%2C+C+J%3BEverett%2C+Mark+E&rft.aulast=Beskardes&rft.aufirst=G&rft.date=2017-02-01&rft.volume=208&rft.issue=2&rft.spage=639&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/10.1093%2Fgji%2Fggw375 L2 - http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. N1 - Date revised - 2017-01-01 N1 - Number of references - 39 N1 - Document feature - illus. N1 - Last updated - 2017-02-17 N1 - SubjectsTermNotLitGenreText - controlled-source methods; deconvolution; Edwards Plateau; electrical conductivity; electrical properties; electromagnetic field; electromagnetic methods; fault zones; finite difference analysis; foliation; fractals; geophysical methods; geophysical surveys; heterogeneity; lineation; noise; numerical analysis; numerical models; orientation; physical properties; power law; roughness; self-similarity; surveys; Texas; three-dimensional models; United States DO - http://dx.doi.org/10.1093/gji/ggw375 ER - TY - JOUR T1 - Uncertainty quantification in LES of channel flow AN - 1859495244; PQ0003991219 AB - In this paper, we present a Bayesian framework for estimating joint densities for large eddy simulation (LES) sub-grid scale model parameters based on canonical forced isotropic turbulence direct numerical simulation (DNS) data. The framework accounts for noise in the independent variables, and we present alternative formulations for accounting for discrepancies between model and data. To generate probability densities for flow characteristics, posterior densities for sub-grid scale model parameters are propagated forward through LES of channel flow and compared with DNS data. Synthesis of the calibration and prediction results demonstrates that model parameters have an explicit filter width dependence and are highly correlated. Discrepancies between DNS and calibrated LES results point to additional model form inadequacies that need to be accounted for. We present a Bayesian framework for estimating joint densities for large eddy simulation sub-grid scale model parameters based on canonical forced isotropic turbulence direct numerical simulation data. Posterior densities for sub-grid scale model parameters are then propagated forward through large eddy simulation of channel flow and compared to channel flow direct numerical simulation data. JF - International Journal for Numerical Methods in Fluids AU - Safta, Cosmin AU - Blaylock, Myra AU - Templeton, Jeremy AU - Domino, Stefan AU - Sargsyan, Khachik AU - Najm, Habib AD - Sandia National Laboratories, Livermore, 94551-0969, CA, USA. Y1 - 2017/02// PY - 2017 DA - February 2017 SP - 376 EP - 401 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 83 IS - 4 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - turbulence KW - Numerical analysis KW - Flow Characteristics KW - Scale models KW - Calibrations KW - Channel Flow KW - Turbulence KW - Modelling KW - Simulation Analysis KW - Density KW - Simulation KW - Framework KW - Filters KW - Channel flow KW - Eddies KW - Noise KW - Fluid dynamics KW - AQ 00001:Water Resources and Supplies KW - Q2 09203:Propagation of sound KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859495244?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+for+Numerical+Methods+in+Fluids&rft.atitle=Uncertainty+quantification+in+LES+of+channel+flow&rft.au=Safta%2C+Cosmin%3BBlaylock%2C+Myra%3BTempleton%2C+Jeremy%3BDomino%2C+Stefan%3BSargsyan%2C+Khachik%3BNajm%2C+Habib&rft.aulast=Safta&rft.aufirst=Cosmin&rft.date=2017-02-01&rft.volume=83&rft.issue=4&rft.spage=376&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.4272 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-01-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Numerical analysis; Eddies; Scale models; Channel flow; Fluid dynamics; Simulation; Framework; Turbulence; Modelling; Filters; Flow Characteristics; Calibrations; Simulation Analysis; Density; Noise; turbulence; Channel Flow DO - http://dx.doi.org/10.1002/fld.4272 ER - TY - JOUR T1 - Assessment of infrasound detectors based on analyst review, environmental effects, and detection characteristics AN - 1873351026; 2017-015824 AB - To assess infrasound detector performance, automated detections by the progressive multichannel correlation method (Cansi, 1995) and the adaptive F-detector (AFD; Arrowsmith et al., 2009) are compared with signals identified by five independent analysts. Each detector was applied to a 4-hr time sequence recorded by the Korean seismoacoustic array, CHNAR, composed of small (<100 m) and large ( approximately 1000 m) aperture subarrays. Detector effectiveness was estimated for a selection of array elements and detection thresholds under low- and high-noise conditions. Estimated receiver operating characteristic based on events identified by analysts evaluates the change in detection probability (P (sub d) ) and false-alarm probability (P (sub f) ) for various detector parameters. This empirical study documents that the use of smaller aperture subarrays by both detectors increases P (sub d) with smaller p-values recommended for AFD to minimize P (sub f) P (sub d) is impacted most by noise level, as shown by an increase in detections for average root mean square amplitudes from 1.2 to 3.2 MPa. Critical to this assessment is the identification of the source of the noise, constrained by signal characteristics, complementary seismic observations, and realistic atmospheric modeling. Based on signal characteristics (correlation value, phase velocity, and detection azimuth) and raytracing using global and local weather datasets, we conclude that during low-noise conditions some detections from local distances (10-50 km) are affected by surface wind direction, and a second set is affected by tropospheric winds. This illustrates the role that surface and higher-atmosphere winds play in array performance when assessing signals from regional infrasound sources in which local detections may be considered as noise or clutter. Electronic Supplement: Figures showing summary of detection results and polar plots of correlation estimates and phase velocity with respective to azimuth. JF - Bulletin of the Seismological Society of America AU - Park, Junghyun AU - Hayward, Chris T AU - Zeiler, Cleat P AU - Arrowsmith, Stephen J AU - Stump, Brian W Y1 - 2017/01/31/ PY - 2017 DA - 2017 Jan 31 PB - Seismological Society of America, Berkeley, CA VL - Pre-Issue Publication SN - 0037-1106, 0037-1106 KW - AFD KW - Far East KW - elastic waves KW - environmental effects KW - PMCC KW - p-values KW - probability KW - nuclear explosions KW - Asia KW - arrival time KW - acoustical emissions KW - seismograms KW - USArray KW - monitoring KW - explosions KW - statistical analysis KW - atmosphere KW - Korea KW - signals KW - noise KW - InfraMonitor KW - WinPMCC KW - eruptions KW - CHNAR KW - infrasound KW - seismic networks KW - filters KW - arrays KW - acoustical waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873351026?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Assessment+of+infrasound+detectors+based+on+analyst+review%2C+environmental+effects%2C+and+detection+characteristics&rft.au=Park%2C+Junghyun%3BHayward%2C+Chris+T%3BZeiler%2C+Cleat+P%3BArrowsmith%2C+Stephen+J%3BStump%2C+Brian+W&rft.aulast=Park&rft.aufirst=Junghyun&rft.date=2017-01-31&rft.volume=Pre-Issue+Publication&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120160125 L2 - http://bssa.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2017-01-01 N1 - Number of references - 34 N1 - PubXState - CA N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2017-03-02 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - acoustical emissions; acoustical waves; AFD; arrays; arrival time; Asia; atmosphere; CHNAR; elastic waves; environmental effects; eruptions; explosions; Far East; filters; InfraMonitor; infrasound; Korea; monitoring; noise; nuclear explosions; p-values; PMCC; probability; seismic networks; seismograms; signals; statistical analysis; USArray; WinPMCC DO - http://dx.doi.org/10.1785/0120160125 ER - TY - JOUR T1 - On-chip integration of droplet microfluidics and nanostructure-initiator mass spectrometry for enzyme screening. AN - 1852669142; 27957569 AB - Biological assays often require expensive reagents and tedious manipulations. These shortcomings can be overcome using digitally operated microfluidic devices that require reduced sample volumes to automate assays. One particular challenge is integrating bioassays with mass spectrometry based analysis. Towards this goal we have developed μNIMS, a highly sensitive and high throughput technique that integrates droplet microfluidics with nanostructure-initiator mass spectrometry (NIMS). Enzyme reactions are carried out in droplets that can be arrayed on discrete NIMS elements at defined time intervals for subsequent mass spectrometry analysis, enabling time resolved enzyme activity assay. We apply the μNIMS platform for kinetic characterization of a glycoside hydrolase enzyme (CelE-CMB3A), a chimeric enzyme capable of deconstructing plant hemicellulose into monosaccharides for subsequent conversion to biofuel. This study reveals NIMS nanostructures can be fabricated into arrays for microfluidic droplet deposition, NIMS is compatible with droplet and digital microfluidics, and can be used on-chip to assay glycoside hydrolase enzyme in vitro. JF - Lab on a chip AU - Heinemann, Joshua AU - Deng, Kai AU - Shih, Steve C C AU - Gao, Jian AU - Adams, Paul D AU - Singh, Anup K AU - Northen, Trent R AD - Joint Bioenergy Institute, Emeryville, California 94608, USA and Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. trnorthen@lbl.gov. ; Joint Bioenergy Institute, Emeryville, California 94608, USA and Sandia National Laboratories, Livermore, California 94551, USA. ; Department of Electrical and Computer Engineering, Concordia University, Montreal, Quebec, Canada. ; Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. trnorthen@lbl.gov. ; Joint Bioenergy Institute, Emeryville, California 94608, USA and Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. trnorthen@lbl.gov and Department of Bioengineering, University of California, Berkeley, California, 94720, USA. ; Joint Bioenergy Institute, Emeryville, California 94608, USA and Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. trnorthen@lbl.gov and Joint Genome Institute, Walnut creek, California, 94598, USA. Y1 - 2017/01/17/ PY - 2017 DA - 2017 Jan 17 SP - 323 EP - 331 VL - 17 IS - 2 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1852669142?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Lab+on+a+chip&rft.atitle=On-chip+integration+of+droplet+microfluidics+and+nanostructure-initiator+mass+spectrometry+for+enzyme+screening.&rft.au=Heinemann%2C+Joshua%3BDeng%2C+Kai%3BShih%2C+Steve+C+C%3BGao%2C+Jian%3BAdams%2C+Paul+D%3BSingh%2C+Anup+K%3BNorthen%2C+Trent+R&rft.aulast=Heinemann&rft.aufirst=Joshua&rft.date=2017-01-17&rft.volume=17&rft.issue=2&rft.spage=323&rft.isbn=&rft.btitle=&rft.title=Lab+on+a+chip&rft.issn=1473-0189&rft_id=info:doi/10.1039%2Fc6lc01182a LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-12-13 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1039/c6lc01182a ER - TY - JOUR T1 - SALSA3D: A Tomographic Model of Compressional Wave Slowness in the Earth's Mantle for Improved Travel-Time Prediction and Travel-Time Prediction Uncertainty AN - 1850776884; PQ0003933431 AB - The task of monitoring the Earth for nuclear explosions relies heavily on seismic data to detect, locate, and characterize suspected nuclear tests. Motivated by the need to locate suspected explosions as accurately and precisely as possible, we developed a tomographic model of the compressional wave slowness in the Earth's mantle with primary focus on the accuracy and precision of travel-time predictions for P and Pn ray paths through the model. Path-dependent travel-time prediction uncertainties are obtained by computing the full 3D model covariance matrix and then integrating slowness variance and covariance along ray paths from source to receiver. Path-dependent travel-time prediction uncertainties reflect the amount of seismic data that was used in tomography with very low values for paths represented by abundant data in the tomographic data set and very high values for paths through portions of the model that were poorly sampled by the tomography data set. The pattern of travel-time prediction uncertainty is a direct result of the off-diagonal terms of the model covariance matrix and underscores the importance of incorporating the full model covariance matrix in the determination of travel-time prediction uncertainty. The computed pattern of uncertainty differs significantly from that of 1D distance-dependent travel-time uncertainties computed using traditional methods, which are only appropriate for use with travel times computed through 1D velocity models. JF - Bulletin of the Seismological Society of America. Berkeley CA AU - Ballard, Sanford AU - Hipp, James R AU - Begnaud, Michael L AU - Young, Christopher J AU - Encarnacao, Andre V AU - Chael, Eric P AU - Phillips, WScott AD - Sandia National Laboratories, P.O. Box 5800, MS 0404, Albuquerque, New Mexico 87185, sballar@sandia.gov Y1 - 2016/12/11/ PY - 2016 DA - 2016 Dec 11 SP - 2900 EP - 2916 PB - Seismological Society of America VL - 106 IS - 6 SN - 0037-1106, 0037-1106 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Prediction KW - Velocity KW - Seismic data KW - Explosions KW - Methodology KW - Ray paths KW - Waves KW - Nuclear explosions KW - Earth mantle KW - Modelling KW - Q2 09270:Seismology KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1850776884?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America.+Berkeley+CA&rft.atitle=SALSA3D%3A+A+Tomographic+Model+of+Compressional+Wave+Slowness+in+the+Earth%27s+Mantle+for+Improved+Travel-Time+Prediction+and+Travel-Time+Prediction+Uncertainty&rft.au=Ballard%2C+Sanford%3BHipp%2C+James+R%3BBegnaud%2C+Michael+L%3BYoung%2C+Christopher+J%3BEncarnacao%2C+Andre+V%3BChael%2C+Eric+P%3BPhillips%2C+WScott&rft.aulast=Ballard&rft.aufirst=Sanford&rft.date=2016-12-11&rft.volume=106&rft.issue=6&rft.spage=2900&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America.+Berkeley+CA&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150271 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Ray paths; Seismic data; Nuclear explosions; Earth mantle; Explosions; Methodology; Modelling; Prediction; Velocity; Waves DO - http://dx.doi.org/10.1785/0120150271 ER - TY - JOUR T1 - A Certified Health Physicist's Reflections on a 40-Year Career in Radiation Protection AN - 1868329876; PQ0004053011 AB - This is a reflection from a certified health physicist regarding his becoming aware, during his 40-year career, that the linear no-threshold (LNT) model and the associated As Low As Reasonably Achievable concept have no scientific basis and make no positive contribution to radiation safety. They should be replaced by an alternative, scientifically based model that includes a threshold, below which there is no harm, and recognition of hormesis and the adaptive response, which reflect the benefits of low-dose and low-dose-rate radiation exposure. Continued use of the unscientific LNT model is not conservative, as most regulators complacently claim but actually harmful. Examples of these harmful impacts in the areas of nuclear power, nuclear medicine, and environmental management are included. JF - Dose-Response AU - Miller, Mark L AD - 1 .Sandia National Laboratories, Albuquerque, NM, USA, marklmiller20@gmail.com Y1 - 2016/12// PY - 2016 DA - December 2016 PB - Sage Publications, Inc., University of Massachusetts Amherst MA 01003 VL - 14 IS - 4 KW - Toxicology Abstracts KW - LNT model KW - radiation hormesis KW - adaptive response KW - low-dose radiation KW - hormesis KW - Nuclear medicine KW - Models KW - X 24390:Radioactive Materials UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1868329876?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxicologyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Dose-Response&rft.atitle=A+Certified+Health+Physicist%27s+Reflections+on+a+40-Year+Career+in+Radiation+Protection&rft.au=Miller%2C+Mark+L&rft.aulast=Miller&rft.aufirst=Mark&rft.date=2016-12-01&rft.volume=14&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Dose-Response&rft.issn=1559-3258&rft_id=info:doi/10.1177%2F1559325816673492 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-02-01 N1 - Number of references - 10 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - hormesis; Nuclear medicine; Models DO - http://dx.doi.org/10.1177/1559325816673492 ER - TY - JOUR T1 - SALSA3D; a tomographic model of compressional wave slowness in the earth's mantle for improved travel-time prediction and travel-time prediction uncertainty AN - 1859791432; 2017-006013 AB - The task of monitoring the Earth for nuclear explosions relies heavily on seismic data to detect, locate, and characterize suspected nuclear tests. Motivated by the need to locate suspected explosions as accurately and precisely as possible, we developed a tomographic model of the compressional wave slowness in the Earth's mantle with primary focus on the accuracy and precision of travel-time predictions for P and Pn ray paths through the model. Path-dependent travel-time prediction uncertainties are obtained by computing the full 3D model covariance matrix and then integrating slowness variance and covariance along ray paths from source to receiver. Path-dependent travel-time prediction uncertainties reflect the amount of seismic data that was used in tomography with very low values for paths represented by abundant data in the tomographic data set and very high values for paths through portions of the model that were poorly sampled by the tomography data set. The pattern of travel-time prediction uncertainty is a direct result of the off-diagonal terms of the model covariance matrix and underscores the importance of incorporating the full model covariance matrix in the determination of travel-time prediction uncertainty. The computed pattern of uncertainty differs significantly from that of 1D distance-dependent travel-time uncertainties computed using traditional methods, which are only appropriate for use with travel times computed through 1D velocity models. JF - Bulletin of the Seismological Society of America AU - Ballard, Sanford AU - Hipp, James R AU - Begnaud, Michael L AU - Young, Christopher J AU - Encarnacao, Andre V AU - Chael, Eric P AU - Phillips, W Scott Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 2900 EP - 2916 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 6 SN - 0037-1106, 0037-1106 KW - tomography KW - P-waves KW - body waves KW - numerical models KW - three-dimensional models KW - explosions KW - Bayesian analysis KW - statistical analysis KW - mantle KW - elastic waves KW - core-mantle boundary KW - Mohorovicic discontinuity KW - outer core KW - lower mantle KW - traveltime KW - velocity KW - SALSA3D KW - propagation KW - core KW - seismic waves KW - nuclear explosions KW - 18:Solid-earth geophysics KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859791432?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=SALSA3D%3B+a+tomographic+model+of+compressional+wave+slowness+in+the+earth%27s+mantle+for+improved+travel-time+prediction+and+travel-time+prediction+uncertainty&rft.au=Ballard%2C+Sanford%3BHipp%2C+James+R%3BBegnaud%2C+Michael+L%3BYoung%2C+Christopher+J%3BEncarnacao%2C+Andre+V%3BChael%2C+Eric+P%3BPhillips%2C+W+Scott&rft.aulast=Ballard&rft.aufirst=Sanford&rft.date=2016-12-01&rft.volume=106&rft.issue=6&rft.spage=2900&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150271 L2 - http://bssa.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2017-01-01 N1 - Number of references - 46 N1 - PubXState - CA N1 - Document feature - illus. N1 - Last updated - 2017-01-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - Bayesian analysis; body waves; core; core-mantle boundary; elastic waves; explosions; lower mantle; mantle; Mohorovicic discontinuity; nuclear explosions; numerical models; outer core; P-waves; propagation; SALSA3D; seismic waves; statistical analysis; three-dimensional models; tomography; traveltime; velocity DO - http://dx.doi.org/10.1785/0120150271 ER - TY - JOUR T1 - Radionuclide removal by apatite AN - 1859788766; 2017-005890 AB - A growing body of research supports widespread future reliance on apatite for radioactive waste cleanup. Apatite is a multi-functional radionuclide sorbent that lowers dissolved radionuclide concentrations by surface sorption, ion exchange, surface precipitation, and by providing phosphate to precipitate low-solubility radionuclide-containing minerals. Natural apatites are rich in trace elements, and apatite's stability in the geologic record suggest that radionuclides incorporated into apatite, whether in a permeable reactive barrier or a waste form, are likely to remain isolated from the biosphere for long periods of time. Here we outline the mineralogic and surface origins of apatite-radionuclide reactivity and show how apatites might be used to environmental advantage in the future. JF - American Mineralogist AU - Rigali, Mark J AU - Brady, Patrick V AU - Moore, Robert C Y1 - 2016/12// PY - 2016 DA - December 2016 SP - 2611 EP - 2619 PB - Mineralogical Society of America, Washington, DC VL - 101 IS - 12 SN - 0003-004X, 0003-004X KW - United States KW - halides KW - Sr-90 KW - sorption KW - Far East KW - selenates KW - isotopes KW - Fry Canyon KW - radioactive waste KW - radioactive isotopes KW - absorbent materials KW - cesium KW - applications KW - Asia KW - apatite KW - Fukushima Japan KW - alkaline earth metals KW - fixation KW - Washington KW - iodides KW - selenites KW - alkali metals KW - Hanford Site KW - phosphates KW - adsorption KW - solubility KW - Cs-137 KW - metals KW - Utah KW - uranium KW - Honshu KW - waste disposal KW - actinides KW - strontium KW - Japan KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1859788766?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Mineralogist&rft.atitle=Radionuclide+removal+by+apatite&rft.au=Rigali%2C+Mark+J%3BBrady%2C+Patrick+V%3BMoore%2C+Robert+C&rft.aulast=Rigali&rft.aufirst=Mark&rft.date=2016-12-01&rft.volume=101&rft.issue=12&rft.spage=2611&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam-2016-5769 L2 - http://www.minsocam.org/MSA/AmMin/TOC/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2017-01-01 N1 - Number of references - 96 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2017-01-19 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - absorbent materials; actinides; adsorption; alkali metals; alkaline earth metals; apatite; applications; Asia; cesium; Cs-137; Far East; fixation; Fry Canyon; Fukushima Japan; halides; Hanford Site; Honshu; iodides; isotopes; Japan; metals; phosphates; radioactive isotopes; radioactive waste; selenates; selenites; solubility; sorption; Sr-90; strontium; United States; uranium; Utah; Washington; waste disposal DO - http://dx.doi.org/10.2138/am-2016-5769 ER - TY - JOUR T1 - Solubility constants of hydroxyl sodalite at elevated temperatures evaluated from hydrothermal experiments; applications to nuclear waste isolation AN - 1869032058; 2017-011440 AB - In this study, solubility constants of hydroxyl sodalite (ideal formula, Na (sub 8) [Al (sub 6) Si (sub 6) O (sub 24) ][OH] (sub 2) .3H (sub 2) O) from 25 degrees C to 100 degrees C are obtained by applying a high temperature Al-Si Pitzer model to evaluate solubility data on hydroxyl sodalite in high ionic strength solutions at elevated temperatures. A validation test comparing model-independent experimental data to model predictions demonstrates that the solubility values produced by the model are in excellent agreement with the experimental data. The equilibrium constants obtained in this study have a wide range of applications, including synthesis of hydroxyl sodalite, de-silication in the Bayer process for extraction of alumina, and the performance of proposed sodalite waste forms in geological repositories in various lithologies including salt formations. The thermodynamic calculations based on the equilibrium constants obtained in this work indicate that the solubility products in terms of m (sub Sigma Al) Xm (sub Sigma Si) for hydroxyl sodalite are very low (e.g., approximately 10 (super -13) [mol.kg (super -1) ] (super 2) at 100 degrees C) in brines characteristic of salt formations, implying that sodalite waste forms would perform very well in repositories located in salt formations. The information regarding the solubility behavior of hydroxyl sodalite obtained in this study provides guidance to investigate the performance of other pure end-members of sodalite such as chloride- and iodide-sodalite, which may be of interest for geological repositories in various media. JF - Applied Geochemistry AU - Xiong, Yongliang Y1 - 2016/11// PY - 2016 DA - November 2016 SP - 138 EP - 143 PB - Elsevier, Oxford-New York-Beijing VL - 74 SN - 0883-2927, 0883-2927 KW - silicates KW - geologic hazards KW - Pitzer model KW - silicon KW - temperature KW - reservoir rocks KW - radioactive waste KW - sedimentary rocks KW - aluminum KW - sodalite group KW - framework silicates KW - thermodynamic properties KW - experimental studies KW - chemically precipitated rocks KW - prediction KW - solubility KW - evaporites KW - hydrothermal conditions KW - models KW - metals KW - natural hazards KW - electrolysis KW - reservoir properties KW - sodalite KW - waste disposal KW - crystal chemistry KW - salt KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869032058?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Geochemistry&rft.atitle=Solubility+constants+of+hydroxyl+sodalite+at+elevated+temperatures+evaluated+from+hydrothermal+experiments%3B+applications+to+nuclear+waste+isolation&rft.au=Xiong%2C+Yongliang&rft.aulast=Xiong&rft.aufirst=Yongliang&rft.date=2016-11-01&rft.volume=74&rft.issue=&rft.spage=138&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/10.1016%2Fj.apgeochem.2016.09.009 L2 - http://www.sciencedirect.com/science/journal/08832927 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2017-01-01 N1 - Number of references - 40 N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2017-02-17 N1 - SubjectsTermNotLitGenreText - aluminum; chemically precipitated rocks; crystal chemistry; electrolysis; evaporites; experimental studies; framework silicates; geologic hazards; hydrothermal conditions; metals; models; natural hazards; Pitzer model; prediction; radioactive waste; reservoir properties; reservoir rocks; salt; sedimentary rocks; silicates; silicon; sodalite; sodalite group; solubility; temperature; thermodynamic properties; waste disposal DO - http://dx.doi.org/10.1016/j.apgeochem.2016.09.009 ER - TY - JOUR T1 - Ionic Liquids Impact the Bioenergy Feedstock-Degrading Microbiome and Transcription of Enzymes Relevant to Polysaccharide Hydrolysis. AN - 1852688852; 27981239 AB - Ionic liquid (IL) pretreatment is a promising approach for the conversion of lignocellulose to biofuels. The toxicity of residual IL, however, negatively impacts the performance of industrial enzymes and microorganisms in hydrolysis and fermentation. In this study, a thermophilic microbial community was cultured on switchgrass amended with various levels of the ionic liquid 1-ethyl-3-methylimidazolium acetate. Changes in the microbial community composition and transcription of genes relevant to IL tolerance and lignocellulose hydrolysis were quantified. Increasing the level of IL to 0.1% (wt) led to increased levels of relative abundance and transcription in organisms of the phylum Firmicutes. Interestingly, IL concentrations of up to 1% (wt) also resulted in greater xylanase transcription and enzyme activity as well as increased transcription of endoglucanase, beta-glucosidase, and IL tolerance genes compared to communities without IL. IL levels above 1% (wt) resulted in decreased enzyme activity and transcription of genes involved in lignocellulose hydrolysis. The results indicate that moderate levels of IL select for thermophilic microorganisms that not only tolerate IL but also effectively hydrolyze lignocellulose from switchgrass. Discovery of IL-tolerant organisms and enzymes is critical for the development of biological processes that convert IL-pretreated biomass to biofuels and chemicals. Employing metatranscriptomic analysis of enrichment cultures can facilitate the discovery of microorganisms and enzymes that may be active in the presence of toxic compounds such as ionic liquids. IMPORTANCE Pretreatment using ionic liquids (IL) is a promising approach for the conversion of lignocellulose to biofuels. Because IL can be inhibitory to enzymes and microorganisms involved in downstream hydrolysis and fermentation steps, discovery of IL-tolerant organisms and enzymes is critical for advancing this technology. Employing metatranscriptomics in the analysis of IL-enriched cultures facilitated tracking of dynamic changes in a complex microbial community at the level of gene transcription and doing so with genome resolution. Specific organisms were discovered that could simultaneously tolerate a moderate IL concentration and transcribe a diverse array of cellulolytic enzymes. Gene sequences of cellulolytic enzymes and efflux pumps from those same organisms were also identified, providing important resources for future research on engineering IL-tolerant organisms and enzymes. JF - mSystems AU - Wu, Yu-Wei AU - Higgins, Brendan AU - Yu, Chaowei AU - Reddy, Amitha P AU - Ceballos, Shannon AU - Joh, Lawrence D AU - Simmons, Blake A AU - Singer, Steven W AU - VanderGheynst, Jean S AD - Joint BioEnergy Institute, Emeryville, California, USA; Graduate Institute of Biomedical Informatics, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan. ; Biological and Agricultural Engineering, University of California, Davis, Davis, California, USA; Biosystems Engineering, Auburn University, Auburn, Alabama, USA. ; Biological and Agricultural Engineering, University of California, Davis, Davis, California, USA. ; Joint BioEnergy Institute, Emeryville, California, USA; Biological and Materials Science Center, Sandia National Laboratories, Livermore, California, USA. ; Joint BioEnergy Institute, Emeryville, California, USA; Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA. ; Joint BioEnergy Institute, Emeryville, California, USA; Biological and Agricultural Engineering, University of California, Davis, Davis, California, USA. PY - 2016 VL - 1 IS - 6 KW - hemicellulase KW - 1-ethyl-3-methylimidazolium acetate KW - ionic liquid KW - cellulase UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1852688852?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=mSystems&rft.atitle=Ionic+Liquids+Impact+the+Bioenergy+Feedstock-Degrading+Microbiome+and+Transcription+of+Enzymes+Relevant+to+Polysaccharide+Hydrolysis.&rft.au=Wu%2C+Yu-Wei%3BHiggins%2C+Brendan%3BYu%2C+Chaowei%3BReddy%2C+Amitha+P%3BCeballos%2C+Shannon%3BJoh%2C+Lawrence+D%3BSimmons%2C+Blake+A%3BSinger%2C+Steven+W%3BVanderGheynst%2C+Jean+S&rft.aulast=Wu&rft.aufirst=Yu-Wei&rft.date=2016-11-01&rft.volume=1&rft.issue=6&rft.spage=&rft.isbn=&rft.btitle=&rft.title=mSystems&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-12-16 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 ER - TY - JOUR T1 - Magnetic-adhesive based valves for microfluidic devices used in low-resource settings. AN - 1835390432; 27713988 AB - Since the introduction of micro total analytical systems (μTASs), significant advances have been made toward development of lab-on-a-chip platforms capable of performing complex biological assays that can revolutionize public health, among other applications. However, use of these platforms in low-resource environments (e.g. developing countries) has yet to be realized as the majority of technologies used to control microfluidic flow rely on off-device hardware with non-negligible size, cost, power requirements and skill/training to operate. In this paper we describe a magnetic-adhesive based valve that is simple to construct and operate, and can be used to control fluid flow and store reagents within a microfluidic device. The design consists of a port connecting two chambers on different planes in the device that is closed by a neodymium disk magnet seated on a thin ring of adhesive. Bringing an external magnet into contact with the outer surface of the device unseats and displaces the valve magnet from the adhesive ring, exposing the port. Using this configuration, we demonstrate on-device reagent storage and on-demand transport and reaction of contents between chambers. This design requires no power or external instrumentation to operate, is extremely low cost ($0.20 materials cost per valve), can be used by individuals with no technical training, and requires only a hand-held magnet to actuate. Additionally, valve actuation does not compromise the integrity of the completely sealed microfluidic device, increasing safety for the operator when toxic or harmful substances are contained within. This valve concept has the potential to simplify design of μTASs, facilitating development of lab-on-a-chip systems that may be practical for use in point-of-care and low-resource settings. JF - Lab on a chip AU - Harper, Jason C AU - Andrews, Jenna M AU - Ben, Candice AU - Hunt, Andrew C AU - Murton, Jaclyn K AU - Carson, Bryan D AU - Bachand, George D AU - Lovchik, Julie A AU - Arndt, William D AU - Finley, Melissa R AU - Edwards, Thayne L AD - Bioenergy & Biodefense Technologies, Sandia National Laboratories, Albuquerque, NM 87185, USA. Jason.Harper@sandia.gov. ; Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, NM 87185, USA. ; Center for Infectious Disease & Immunity, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131, USA. ; International Biological Threat Reduction, Sandia National Laboratories, Albuquerque, NM 87185, USA. ; Qorvo, Inc. Bend, OR 97703, USA. thayne.edwards@qorvo.com. Y1 - 2016/10/18/ PY - 2016 DA - 2016 Oct 18 SP - 4142 EP - 4151 VL - 16 IS - 21 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1835390432?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Lab+on+a+chip&rft.atitle=Magnetic-adhesive+based+valves+for+microfluidic+devices+used+in+low-resource+settings.&rft.au=Harper%2C+Jason+C%3BAndrews%2C+Jenna+M%3BBen%2C+Candice%3BHunt%2C+Andrew+C%3BMurton%2C+Jaclyn+K%3BCarson%2C+Bryan+D%3BBachand%2C+George+D%3BLovchik%2C+Julie+A%3BArndt%2C+William+D%3BFinley%2C+Melissa+R%3BEdwards%2C+Thayne+L&rft.aulast=Harper&rft.aufirst=Jason&rft.date=2016-10-18&rft.volume=16&rft.issue=21&rft.spage=4142&rft.isbn=&rft.btitle=&rft.title=Lab+on+a+chip&rft.issn=1473-0189&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-10-07 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 ER - TY - JOUR T1 - Resonantly Enhanced Second-Harmonic Generation Using III-V Semiconductor All-Dielectric Metasurfaces. AN - 1819904676; 27501472 AB - Nonlinear optical phenomena in nanostructured materials have been challenging our perceptions of nonlinear optical processes that have been explored since the invention of lasers. For example, the ability to control optical field confinement, enhancement, and scattering almost independently allows nonlinear frequency conversion efficiencies to be enhanced by many orders of magnitude compared to bulk materials. Also, the subwavelength length scale renders phase matching issues irrelevant. Compared with plasmonic nanostructures, dielectric resonator metamaterials show great promise for enhanced nonlinear optical processes due to their larger mode volumes. Here, we present, for the first time, resonantly enhanced second-harmonic generation (SHG) using gallium arsenide (GaAs) based dielectric metasurfaces. Using arrays of cylindrical resonators we observe SHG enhancement factors as large as 10(4) relative to unpatterned GaAs. At the magnetic dipole resonance, we measure an absolute nonlinear conversion efficiency of ∼2 × 10(-5) with ∼3.4 GW/cm(2) pump intensity. The polarization properties of the SHG reveal that both bulk and surface nonlinearities play important roles in the observed nonlinear process. JF - Nano letters AU - Liu, Sheng AU - Sinclair, Michael B AU - Saravi, Sina AU - Keeler, Gordon A AU - Yang, Yuanmu AU - Reno, John AU - Peake, Gregory M AU - Setzpfandt, Frank AU - Staude, Isabelle AU - Pertsch, Thomas AU - Brener, Igal AD - Sandia National Laboratories, Albuquerque, New Mexico 87185, United States. ; Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena , Max-Wien-Platz 1, 07743 Jena, Germany. Y1 - 2016/09/14/ PY - 2016 DA - 2016 Sep 14 SP - 5426 EP - 5432 VL - 16 IS - 9 KW - Index Medicus KW - Second-harmonic generation KW - dielectric metasurfaces KW - resonantly enhanced KW - monolithic KW - III−V semiconductors KW - GaAs UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819904676?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nano+letters&rft.atitle=Resonantly+Enhanced+Second-Harmonic+Generation+Using+III-V+Semiconductor+All-Dielectric+Metasurfaces.&rft.au=Liu%2C+Sheng%3BSinclair%2C+Michael+B%3BSaravi%2C+Sina%3BKeeler%2C+Gordon+A%3BYang%2C+Yuanmu%3BReno%2C+John%3BPeake%2C+Gregory+M%3BSetzpfandt%2C+Frank%3BStaude%2C+Isabelle%3BPertsch%2C+Thomas%3BBrener%2C+Igal&rft.aulast=Liu&rft.aufirst=Sheng&rft.date=2016-09-14&rft.volume=16&rft.issue=9&rft.spage=5426&rft.isbn=&rft.btitle=&rft.title=Nano+letters&rft.issn=1530-6992&rft_id=info:doi/10.1021%2Facs.nanolett.6b01816 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-09-14 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acs.nanolett.6b01816 ER - TY - JOUR T1 - Intercomparison of 3D pore-scale flow and solute transport simulation methods AN - 1861108140; 787270-15 AB - Multiple numerical approaches have been developed to simulate porous media fluid flow and solute transport at the pore scale. These include 1) methods that explicitly model the three-dimensional geometry of pore spaces and 2) methods that conceptualize the pore space as a topologically consistent set of stylized pore bodies and pore throats. In previous work we validated a model of the first type, using computational fluid dynamics (CFD) codes employing a standard finite volume method (FVM), against magnetic resonance velocimetry (MRV) measurements of pore-scale velocities. Here we expand that validation to include additional models of the first type based on the lattice Boltzmann method (LBM) and smoothed particle hydrodynamics (SPH), as well as a model of the second type, a pore-network model (PNM). The PNM approach used in the current study was recently improved and demonstrated to accurately simulate solute transport in a two-dimensional experiment. While the PNM approach is computationally much less demanding than direct numerical simulation methods, the effect of conceptualizing complex three-dimensional pore geometries on solute transport in the manner of PNMs has not been fully determined. We apply all four approaches (FVM-based CFD, LBM, SPH and PNM) to simulate pore-scale velocity distributions and (for capable codes) nonreactive solute transport, and intercompare the model results. Comparisons are drawn both in terms of macroscopic variables (e.g., permeability, solute breakthrough curves) and microscopic variables (e.g., local velocities and concentrations). Generally good agreement was achieved among the various approaches, but some differences were observed depending on the model context. The intercomparison work was challenging because of variable capabilities of the codes, and inspired some code enhancements to allow consistent comparison of flow and transport simulations across the full suite of methods. This study provides support for confidence in a variety of pore-scale modeling methods and motivates further development and application of pore-scale simulation methods. JF - Advances in Water Resources AU - Yang, Xiaofan AU - Mehmani, Yashar AU - Perkins, William A AU - Pasquali, Andrea AU - Schoenherr, Martin AU - Kim, Kyungjoo AU - Perego, Mauro AU - Parks, Michael L AU - Trask, Nathaniel AU - Balhoff, Matthew T AU - Richmond, Marshall C AU - Geier, Martin AU - Krafczyk, Manfred AU - Luo, Li-Shi AU - Tartakovsky, Alexandre M AU - Scheibe, Timothy D Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 176 EP - 189 PB - Elsevier, Oxford VL - 95 SN - 0309-1708, 0309-1708 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861108140?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=Intercomparison+of+3D+pore-scale+flow+and+solute+transport+simulation+methods&rft.au=Yang%2C+Xiaofan%3BMehmani%2C+Yashar%3BPerkins%2C+William+A%3BPasquali%2C+Andrea%3BSchoenherr%2C+Martin%3BKim%2C+Kyungjoo%3BPerego%2C+Mauro%3BParks%2C+Michael+L%3BTrask%2C+Nathaniel%3BBalhoff%2C+Matthew+T%3BRichmond%2C+Marshall+C%3BGeier%2C+Martin%3BKrafczyk%2C+Manfred%3BLuo%2C+Li-Shi%3BTartakovsky%2C+Alexandre+M%3BScheibe%2C+Timothy+D&rft.aulast=Yang&rft.aufirst=Xiaofan&rft.date=2016-09-01&rft.volume=95&rft.issue=&rft.spage=176&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/10.1016%2Fj.advwatres.2015.09.015 L2 - http://www.sciencedirect.com/science/journal/03091708 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1016/j.advwatres.2015.09.015 ER - TY - JOUR T1 - Modeling cross-hole slug tests in an unconfined aquifer AN - 1832724610; 2016-090311 AB - A modified version of a published slug test model for unconfined aquifers is applied to cross-hole slug test data collected in field tests conducted at the Widen site in Switzerland. The model accounts for water-table effects using the linearized kinematic condition. The model also accounts for inertial effects in source and observation wells. The primary objective of this work is to demonstrate applicability of this semi-analytical model to multi-well and multi-level pneumatic slug tests. The pneumatic perturbation was applied at discrete intervals in a source well and monitored at discrete vertical intervals in observation wells. The source and observation well pairs were separated by distances of up to 4 m. The analysis yielded vertical profiles of hydraulic conductivity, specific storage, and specific yield at observation well locations. The hydraulic parameter estimates are compared to results from prior pumping and single-well slug tests conducted at the site, as well as to estimates from particle size analyses of sediment collected from boreholes during well installation. The results are in general agreement with results from prior tests and are indicative of a sand and gravel aquifer. Sensitivity analysis show that model identification of specific yield is strongest at late-time. However, the usefulness of late-time data is limited due to the low signal-to-noise ratios. JF - Journal of Hydrology AU - Malama, Bwalya AU - Kuhlman, Kristopher L AU - Brauchler, Ralf AU - Bayer, Peter Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 784 EP - 796 PB - Elsevier, Amsterdam VL - 540 SN - 0022-1694, 0022-1694 KW - Widen Switzerland KW - water storage KW - slug tests KW - experimental studies KW - crosshole methods KW - well-logging KW - observation wells KW - Europe KW - Switzerland KW - ground water KW - aquifers KW - models KW - sensitivity analysis KW - Central Europe KW - water yield KW - mathematical methods KW - sediments KW - signal-to-noise ratio KW - hydraulic conductivity KW - unconfined aquifers KW - 21:Hydrogeology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832724610?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology&rft.atitle=Modeling+cross-hole+slug+tests+in+an+unconfined+aquifer&rft.au=Malama%2C+Bwalya%3BKuhlman%2C+Kristopher+L%3BBrauchler%2C+Ralf%3BBayer%2C+Peter&rft.aulast=Malama&rft.aufirst=Bwalya&rft.date=2016-09-01&rft.volume=540&rft.issue=&rft.spage=784&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2016.06.060 L2 - http://www.sciencedirect.com/science/journal/00221694 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 53 N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-10-27 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - aquifers; Central Europe; crosshole methods; Europe; experimental studies; ground water; hydraulic conductivity; mathematical methods; models; observation wells; sediments; sensitivity analysis; signal-to-noise ratio; slug tests; Switzerland; unconfined aquifers; water storage; water yield; well-logging; Widen Switzerland DO - http://dx.doi.org/10.1016/j.jhydrol.2016.06.060 ER - TY - JOUR T1 - Electrochemical activity of Fe-MIL-100 as a positive electrode for Na-ion batteries AN - 1827887686; PQ0003684482 AB - Here we investigate the electrochemical activity of metal-organic frameworks (MOFs) as positive electrodes for Na-ion batteries in coin cell configurations. The performance of Fe-MIL-100 material is highly dependent on the choice of sodium salt source, and electrolyte system. The overall capacity fades over many cycles, however the high coulombic efficiency is maintained. This can be correlated with inaccessibility of active sites for Na intercalation, due to the increase of extra carbonaceous material inside the pores. Powder X-ray diffraction via synchrotron data and pair distribution function analyses of the as-made and cycled electrodes reveal the structure maintains the long-range order with progressive cycling. This finding suggests that careful consideration of all variables in battery components, and especially electrolyte selection can lead to greatly improved performances. JF - Journal of materials chemistry. A, Materials for energy and sustainability AU - Sava Gallis, Dorina F AU - Pratt, Harry D, III AU - Anderson, Travis M AU - Chapman, Karena W AD - Nanoscale Sciences Department; Sandia National Laboratories; Albuquerque; NM 87185; USA Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 13764 EP - 13770 PB - Royal Society of Chemistry VL - 4 IS - 36 SN - 2050-7488, 2050-7488 KW - Environment Abstracts KW - Sodium KW - Salts KW - Electrolytes KW - Batteries KW - Energy KW - Electrodes KW - Electrochemistry KW - X-ray diffraction KW - Sustainability KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1827887686?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.atitle=Electrochemical+activity+of+Fe-MIL-100+as+a+positive+electrode+for+Na-ion+batteries&rft.au=Sava+Gallis%2C+Dorina+F%3BPratt%2C+Harry+D%2C+III%3BAnderson%2C+Travis+M%3BChapman%2C+Karena+W&rft.aulast=Sava+Gallis&rft.aufirst=Dorina&rft.date=2016-09-01&rft.volume=4&rft.issue=36&rft.spage=13764&rft.isbn=&rft.btitle=&rft.title=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.issn=20507488&rft_id=info:doi/10.1039%2Fc6ta03943j LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-10-01 N1 - Number of references - 31 N1 - Last updated - 2016-10-26 N1 - SubjectsTermNotLitGenreText - Sodium; Salts; Electrolytes; Batteries; Energy; Electrodes; X-ray diffraction; Electrochemistry; Sustainability DO - http://dx.doi.org/10.1039/c6ta03943j ER - TY - JOUR T1 - Desert Peak EGS; mechanisms influencing permeability evolution investigated using dual-porosity simulator TFReact AN - 1824213387; 2016-083421 AB - The reservoir response associated with selected phases of the hydraulic stimulation conducted as part of the 2010-2013 Desert Peak Enhanced Geothermal System (EGS) project was investigated using the dual-porosity numerical simulator TFReact. The code couples the solid mechanics (M) analyses of FLAC3D with the multiphase, non-isothermal and reactive capabilities (THC) of TOUGHREACT, and allows for a comprehensive investigation of the major thermal-hydraulic-mechanical-chemical (THMC) physical processes occurring in deep, tight rock masses subject to circulation of pressurized fluids. Numerical simulations were performed to determine: (a) pore pressure diffusion and stress field modifications, (b) development of mechanical deformation, and, above all, (c) relative impact of tensile vs. shear deformation on the evolution of the reservoir permeability. A three-well reservoir model was implemented to account for the combined influence of concurrent injection in wells 27-15 (EGS well), 22-22 and 21-2 (active injectors). This study simulated selected stimulation treatments carried out from 914 to 1067 m depth (shallow stimulation interval) and from 914 to 1771 m depth (extended stimulation interval). Alternative hydraulic stimulation schemes/scenarios (by assuming diverse varying injectate properties and injection durations) were modeled over the two stimulation intervals to test if and how the final permeability could have been further improved. Simulated permeability modifications appear to be predominantly governed by thermo-hydro-mechanical dilation (elastic) during stimulation of the shallow interval and by hydro-mechanical deformation (inelastic shear) during stimulation of the extended interval. Inelastic shear deformation delivers higher permeability gains, and in the shortest time, when hydraulically conductive and well-oriented features are targeted with the stimulation treatment. TFReact simulations combined with a detailed site conceptualization and microseismicity interpretation, provide further understanding of injection-induced mechanisms. JF - Geothermics AU - Benato, Stefano AU - Taron, Joshua Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 157 EP - 181 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - United States KW - hydraulic fracturing KW - well stimulation KW - geothermal wells KW - geothermal engineering KW - enhanced recovery KW - Lyon County Nevada KW - porosity KW - geothermal energy KW - geothermal fields KW - fluid injection KW - microseisms KW - thermomechanical properties KW - reservoir properties KW - thermochemical properties KW - Desert Peak Field KW - induced earthquakes KW - earthquakes KW - permeability KW - Nevada KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213387?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Desert+Peak+EGS%3B+mechanisms+influencing+permeability+evolution+investigated+using+dual-porosity+simulator+TFReact&rft.au=Benato%2C+Stefano%3BTaron%2C+Joshua&rft.aulast=Benato&rft.aufirst=Stefano&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=157&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2016.01.002 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 54 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - Desert Peak Field; earthquakes; enhanced recovery; fluid injection; geothermal energy; geothermal engineering; geothermal fields; geothermal wells; hydraulic fracturing; induced earthquakes; Lyon County Nevada; microseisms; Nevada; permeability; porosity; reservoir properties; thermochemical properties; thermomechanical properties; United States; well stimulation DO - http://dx.doi.org/10.1016/j.geothermics.2016.01.002 ER - TY - JOUR T1 - Early-flowback tracer signals for fracture characterization in an EGS developed in deep crystalline and sedimentary formations; a parametric study AN - 1824213308; 2016-083426 AB - Artificial-fracture design and fracture characterization is a central aspect of many Enhanced Geothermal System (EGS) projects. The use of single well (SW) short-term tracer signals to characterize fractures at the Gross-Schoenebeck EGS pilot site is explored in this paper. A certain degree of parameter interdependence in short-term flowback signals leads to ambiguity in fracture parameter inversion from measured single-tracer signals. This ambiguity can, to some extent, be overcome by (a) combining different sources of information, and/or (b) using different types of tracers, such as conservative tracer pairs with different diffusivities, or tracer pairs with contrasting sorptivities on target surfaces. Fracture height is likely to be controlled by lithostratigraphy while fracture length can be determined from hydraulic monitoring (pressure signals). Since the flowback rate is known during an individual-fracture test, the unknown parameters to be inferred from tracer tests are (i) transport-effective aperture in a water fracture or (ii) fracture thickness and porosity for a gel-proppant fracture. Tracers with different sorptivity on proppant coatings and matrix rock surfaces for gel-proppant fractures, and tracers with contrasting-diffusivity or -sorptivity for a water fracture were considered. An advantage of this approach is that it requires only a very small chaser injection volume (about half of fracture volume). JF - Geothermics AU - Karmakar, Shyamal AU - Ghergut, Julia AU - Sauter, Martin Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 242 EP - 252 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - monitoring KW - characterization KW - geothermal engineering KW - enhanced recovery KW - porosity KW - geothermal energy KW - fractures KW - fluid injection KW - crystalline rocks KW - reservoir properties KW - hydraulic conductivity KW - permeability KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213308?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Early-flowback+tracer+signals+for+fracture+characterization+in+an+EGS+developed+in+deep+crystalline+and+sedimentary+formations%3B+a+parametric+study&rft.au=Karmakar%2C+Shyamal%3BGhergut%2C+Julia%3BSauter%2C+Martin&rft.aulast=Karmakar&rft.aufirst=Shyamal&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=242&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.08.007 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 37 N1 - Document feature - illus. N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - characterization; crystalline rocks; enhanced recovery; fluid injection; fractures; geothermal energy; geothermal engineering; hydraulic conductivity; monitoring; permeability; porosity; reservoir properties DO - http://dx.doi.org/10.1016/j.geothermics.2015.08.007 ER - TY - JOUR T1 - The Northwest Geysers EGS demonstration project, California; Part 2, Modeling and interpretation AN - 1824213305; 2016-083419 AB - In this paper, we summarize the results of coupled thermal, hydraulic, and mechanical (THM) modeling in support of the Northwest Geysers EGS Demonstration Project, which aims at enhancing production from a known High Temperature Reservoir (HTR) (280-400 degrees C) located under the conventional (240 degrees C) geothermal steam reservoir. The THM modeling was conducted to investigate geomechanical effects of cold-water injection during the stimulation of the EGS, first to predict the extent of the stimulation zone for a given injection schedule, and then to conduct interpretive analyses of the actual stimulation. By using a calibrated THM model based on historic injection and microseismic data at a nearby well, we could reasonably predict the extent of the stimulation zone around the injection well, at least for the first few months of injection. However, observed microseismic evolution and pressure responses over the one-year stimulation-injection revealed more heterogeneous behavior as a result of more complex geology, including a network of shear zones. Therefore, for an interpretive analysis of the one-year stimulation campaign, we included two sets of vertical shear zones within the model; a set of more permeable NW-striking shear zones and a set of less permeable NE-striking shear zones. Our modeling indicates that the microseismic events in this system are related to shear reactivation of pre-existing fractures, triggered by the combined effects of injection-induced cooling around the injection well and rapid (but small) changes in steam pressure as far as a kilometer from the injection well. Overall, the integrated monitoring and modeling of microseismicity, ground surface deformations, reservoir pressure, fluid chemical composition, and seismic tomography depict an EGS system hydraulically bounded by some of the NE-striking low permeability shear zones, with the more permeable NW-striking shear zone providing liquid flow paths for stimulation deep (several kilometers) down into the HTR. The modeling indicates that a significant mechanical degradation (damage) inferred from seismic tomography, and potential changes in fracture porosity inferred from cross-well pressure responses, are related to shear rupture in the stimulation zone driven by both pressure and cooling effects. JF - Geothermics AU - Rutqvist, Jonny AU - Jeanne, Pierre AU - Dobson, Patrick F AU - Garcia, Julio AU - Hartline, Craig AU - Hutchings, Lawrence AU - Singh, Ankit AU - Vasco, Donald W AU - Walters, Mark Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 120 EP - 138 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - United States KW - shear zones KW - well stimulation KW - mathematical models KW - geothermal engineering KW - enhanced recovery KW - thermal waters KW - temperature KW - geothermal energy KW - California KW - geothermal fields KW - fluid injection KW - The Geysers KW - geothermal exploration KW - microseisms KW - Northwest Geysers KW - thermomechanical properties KW - reservoir properties KW - drilling KW - high temperature KW - faults KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213305?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=The+Northwest+Geysers+EGS+demonstration+project%2C+California%3B+Part+2%2C+Modeling+and+interpretation&rft.au=Rutqvist%2C+Jonny%3BJeanne%2C+Pierre%3BDobson%2C+Patrick+F%3BGarcia%2C+Julio%3BHartline%2C+Craig%3BHutchings%2C+Lawrence%3BSingh%2C+Ankit%3BVasco%2C+Donald+W%3BWalters%2C+Mark&rft.aulast=Rutqvist&rft.aufirst=Jonny&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=120&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.08.002 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 47 N1 - Document feature - illus. incl. 1 table, sect. N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - California; drilling; enhanced recovery; faults; fluid injection; geothermal energy; geothermal engineering; geothermal exploration; geothermal fields; high temperature; mathematical models; microseisms; Northwest Geysers; reservoir properties; shear zones; temperature; The Geysers; thermal waters; thermomechanical properties; United States; well stimulation DO - http://dx.doi.org/10.1016/j.geothermics.2015.08.002 ER - TY - JOUR T1 - Supercritical geothermal reservoir revealed by a granite-porphyry system AN - 1824213285; 2016-083422 AB - To understand the geological properties of a supercritical geothermal reservoir, we investigated a granite-porphyry system as a natural analog. Quartz veins, hydrothermal breccia veins, and glassy veins are present in Neogene granitoids in NE Japan. The glassy veins formed at 500-550 degrees C under lithostatic pressures, and then pressures dropped drastically. The solubility of silica also dropped, resulting in formation of quartz veins under a hydrostatic pressure regime. Connections between the lithostatic and hydrostatic pressure regimes were key to the formation of the hydrothermal breccia veins, and the granite-porphyry system provides useful information for creation of fracture clouds in supercritical geothermal reservoirs. JF - Geothermics AU - Tsuchiya, Noriyoshi AU - Yamada, Ryoichi AU - Uno, Masaoki Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 182 EP - 194 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - Kakkonda granite KW - Far East KW - volcanic rocks KW - molybdenum ores KW - igneous rocks KW - granites KW - plutonic rocks KW - Fukushima Daiichi nuclear power plant KW - Akita Japan KW - inclusions KW - gold ores KW - copper ores KW - Asia KW - lead ores KW - zinc ores KW - Tohoku KW - porphyry KW - geothermal energy KW - geothermal fields KW - granite porphyry KW - geothermal exploration KW - metal ores KW - reservoir properties KW - lithostatic pressure KW - fluid inclusions KW - Honshu KW - lead-zinc deposits KW - Japan KW - hydrostatic pressure KW - 29A:Economic geology, geology of energy sources KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213285?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Supercritical+geothermal+reservoir+revealed+by+a+granite-porphyry+system&rft.au=Tsuchiya%2C+Noriyoshi%3BYamada%2C+Ryoichi%3BUno%2C+Masaoki&rft.aulast=Tsuchiya&rft.aufirst=Noriyoshi&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=182&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.12.011 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 54 N1 - Document feature - illus. incl. 3 tables, geol. sketch maps N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - Akita Japan; Asia; copper ores; Far East; fluid inclusions; Fukushima Daiichi nuclear power plant; geothermal energy; geothermal exploration; geothermal fields; gold ores; granite porphyry; granites; Honshu; hydrostatic pressure; igneous rocks; inclusions; Japan; Kakkonda granite; lead ores; lead-zinc deposits; lithostatic pressure; metal ores; molybdenum ores; plutonic rocks; porphyry; reservoir properties; Tohoku; volcanic rocks; zinc ores DO - http://dx.doi.org/10.1016/j.geothermics.2015.12.011 ER - TY - JOUR T1 - The Northwest Geysers EGS demonstration project, California; Part 1, Characterization and reservoir response to injection AN - 1824213280; 2016-083418 AB - An Enhanced Geothermal System (EGS) Demonstration Project is currently underway in the Northwest Geysers. The project goal is to demonstrate the feasibility of stimulating a deep high-temperature reservoir (HTR) (up to 400 degrees C, 750 degrees F). Two previously abandoned wells, Prati State 31 (PS-31) and Prati 32 (P-32), were reopened and deepened to be used as an injection and production doublet to stimulate the HTR. The deepened portions of both wells have conductive temperature gradients of 10 degrees F/100 ft (182 degrees C/km), produce connate native fluids and magmatic gas, and the rocks were isotopically unexchanged by meteoric water. The ambient temperature meteoric water injected into these hot dry rocks has evidently created a permeability volume of several cubic kilometers as determined by seismic monitoring. Preliminary isotopic analyses of the injected and produced water indicate that 50-75% of the steam from the created EGS reservoir is injection-derived. JF - Geothermics AU - Garcia, Julio AU - Hartline, Craig AU - Walters, Mark AU - Wright, Melinda AU - Rutqvist, Jonny AU - Dobson, Patrick F AU - Jeanne, Pierre Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 97 EP - 119 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - United States KW - well stimulation KW - subduction zones KW - geothermal wells KW - well-logging KW - geothermal engineering KW - enhanced recovery KW - hot dry rocks KW - temperature KW - geothermal energy KW - California KW - geothermal fields KW - The Geysers KW - San Andreas Fault KW - microseisms KW - Northwest Geysers KW - reservoir properties KW - induced earthquakes KW - earthquakes KW - high temperature KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213280?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=The+Northwest+Geysers+EGS+demonstration+project%2C+California%3B+Part+1%2C+Characterization+and+reservoir+response+to+injection&rft.au=Garcia%2C+Julio%3BHartline%2C+Craig%3BWalters%2C+Mark%3BWright%2C+Melinda%3BRutqvist%2C+Jonny%3BDobson%2C+Patrick+F%3BJeanne%2C+Pierre&rft.aulast=Garcia&rft.aufirst=Julio&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=97&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.08.003 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 42 N1 - Document feature - illus. incl. 1 table, sects., geol. sketch maps N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - California; earthquakes; enhanced recovery; geothermal energy; geothermal engineering; geothermal fields; geothermal wells; high temperature; hot dry rocks; induced earthquakes; microseisms; Northwest Geysers; reservoir properties; San Andreas Fault; subduction zones; temperature; The Geysers; United States; well stimulation; well-logging DO - http://dx.doi.org/10.1016/j.geothermics.2015.08.003 ER - TY - JOUR T1 - Anomalous distribution of microearthquakes in the Newberry geothermal reservoir; mechanisms and implications AN - 1824213241; 2016-083416 AB - Stimulation of enhanced geothermal system (EGS) reservoirs by fluid injection can enhance the reservoir permeability but may also result in undesired microearthquakes (MEQs). A bimodal depth distribution of fluid-injection-induced MEQs was observed in the 2012 stimulation phase of the Newberry Volcano EGS Demonstration project in Oregon, US. During 7 weeks of hydraulic stimulation of well NWG 55-29, 90% of MEQs occurred in the shallow reservoir ( approximately 500 m to approximately 1800 m), only a few occurred adjacent to the bottom of the open borehole ( approximately 2500 to approximately 3000 m) while almost no seismicity was observed in the intervening interval ( approximately 1800 m to approximately 2500 m). Our analysis of frictional stability using spatial models for fluid pressure diffusion of injected fluids show that the distribution of MEQs is consistent with observed casing damage, and a possible leak at approximately 700 m, and is inconsistent with migration of fluids from the casing shoe. The role of fluid injection through the ruptured casing is further supported by the analyses of shear failure and pore-pressure diffusion. Finally, the absence of seismicity at intermediate depths is consistent with our laboratory determinations of frictional stability, showing velocity strengthening frictional behavior for samples from intermediate depths, bracketed by velocity neutral and weakening behavior for samples from shallower and greater depths. JF - Geothermics AU - Fang, Yi AU - den Hartog, Sabine A M AU - Elsworth, Derek AU - Marone, Chris AU - Cladouhos, Trenton Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 62 EP - 73 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - United States KW - well stimulation KW - geothermal wells KW - Oregon KW - fluid injection KW - Newberry Volcano KW - pore pressure KW - drilling KW - induced earthquakes KW - monitoring KW - mathematical models KW - geothermal engineering KW - enhanced recovery KW - thermal waters KW - geothermal energy KW - Cascade Range KW - geothermal fields KW - Deschutes County Oregon KW - Newberry Field KW - risk assessment KW - reservoir properties KW - microearthquakes KW - earthquakes KW - hydrostatic pressure KW - 19:Seismology KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213241?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Anomalous+distribution+of+microearthquakes+in+the+Newberry+geothermal+reservoir%3B+mechanisms+and+implications&rft.au=Fang%2C+Yi%3Bden+Hartog%2C+Sabine+A+M%3BElsworth%2C+Derek%3BMarone%2C+Chris%3BCladouhos%2C+Trenton&rft.aulast=Fang&rft.aufirst=Yi&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=62&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.04.005 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 45 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - Cascade Range; Deschutes County Oregon; drilling; earthquakes; enhanced recovery; fluid injection; geothermal energy; geothermal engineering; geothermal fields; geothermal wells; hydrostatic pressure; induced earthquakes; mathematical models; microearthquakes; monitoring; Newberry Field; Newberry Volcano; Oregon; pore pressure; reservoir properties; risk assessment; thermal waters; United States; well stimulation DO - http://dx.doi.org/10.1016/j.geothermics.2015.04.005 ER - TY - JOUR T1 - Tracer testing at the Habanero EGS site, central Australia AN - 1824213184; 2016-083413 AB - The Habanero Enhanced Geothermal System (EGS) in central Australia has been under development since 2002, with several deep (more than 4000 m) wells drilled to date into the high-heat-producing granites of the Big Lake Suite. Multiple hydraulic stimulations have been performed to improve the existing fracture permeability in the granite. Stimulation of the newly-drilled Habanero-4 well (H-4) was completed in late 2012, and micro-seismic data indicated an increase in total stimulated reservoir area to approximately 4 km (super 2) . Two well doublets have been tested, initially between Habanero-1 (H-1) and Habanero-3 (H-3), and more recently, between H-1 and H-4. Both doublets effectively operated as closed systems, and excluding short-term flow tests, all production fluids were re-injected into the reservoir at depth. Two inter-well tracer tests have been conducted: the first in 2008, and the most recent one in June 2013, which involved injecting 100 kg of 2,6-naphthalene-disulfonate (NDS) into H-1 to evaluate the hydraulic characteristics of the newly-created H-1/H-4 doublet. After correcting for flow hiatuses and non-steady-state flow conditions, tracer breakthrough in H-4 was observed after 6 days (compared to approximately 4 days for the previous H-1/H-3 doublet), with peak breakthrough occurring after 17 days. Extrapolation of the breakthrough curve to late time indicates that approximately 60% of the tracer mass would eventually be recovered (vs. approximately 80% for the 2008 H-1/H-3 tracer test). This suggests that a large proportion of the tracer may lie trapped in the opposite end of the reservoir from H-4 and/or may have been lost to the far field. The calculated inter-well swept pore volume is approximately 31,000 m (super 3) , which is larger than that calculated for the H-1/H-3 doublet ( approximately 20,000 m (super 3) ). A simple 2D TOUGH2 tracer model, with model geometry constructed based on the current conceptual understanding of the Habanero EGS system, demonstrates good agreement with the measured tracer returns in terms of timing of breakthrough in H-4, and observed tracer dispersion in the tail of the breakthrough curve. JF - Geothermics AU - Ayling, Bridget F AU - Hogarth, Robert A AU - Rose, Peter E Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 15 EP - 26 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - TOUGH2 KW - Cooper Basin KW - well stimulation KW - Australasia KW - igneous rocks KW - granites KW - enhanced recovery KW - Eromanga Basin KW - Lake Eyre Basin KW - geothermal energy KW - computer programs KW - geothermal fields KW - plutonic rocks KW - Habanero Field KW - Big Lake Suite KW - tracers KW - reservoir properties KW - Australia KW - hydraulic conductivity KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213184?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Tracer+testing+at+the+Habanero+EGS+site%2C+central+Australia&rft.au=Ayling%2C+Bridget+F%3BHogarth%2C+Robert+A%3BRose%2C+Peter+E&rft.aulast=Ayling&rft.aufirst=Bridget&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=15&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.03.008 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 36 N1 - Document feature - illus. incl. 3 tables, geol. sketch maps N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - Australasia; Australia; Big Lake Suite; computer programs; Cooper Basin; enhanced recovery; Eromanga Basin; geothermal energy; geothermal fields; granites; Habanero Field; hydraulic conductivity; igneous rocks; Lake Eyre Basin; plutonic rocks; reservoir properties; TOUGH2; tracers; well stimulation DO - http://dx.doi.org/10.1016/j.geothermics.2015.03.008 ER - TY - JOUR T1 - Conceptual model and numerical analysis of the Desert Peak EGS project; reservoir response to the shallow medium flow-rate hydraulic stimulation phase AN - 1824213111; 2016-083420 AB - A series of stimulation treatments were performed as part of the Engineered Geothermal System (EGS) experiment in the shallow open-hole section of Desert Peak well 27-15 (September 2010-November 2012). These injections at variable wellhead pressures, both below and above the magnitude of the least horizontal principal stress (S (sub hmin) ), produced injectivity gains consistent with hydraulically induced mechanical shear and tensile failure in the surrounding rock. A conceptual framework for the overall Desert Peak EGS experiment is developed and tested based on a synthesis of available structural and geological data. These data include down-hole fracture attributes, in situ stress conditions, pressure interference tests, geochemical tracer studies, and observed induced seismicity. Induced seismicity plays a key role in identifying the geometry of large-scale geological structures that could potentially serve as preferential flow paths during some of the stimulation phases. The numerical code FLAC3D is implemented to simulate the reservoir response to hydraulic stimulation and to investigate in situ conditions conducive to both tensile and shear failure. Results from the numerical analysis show that conditions for shear failure could have occurred along fractures associated with a large northeast-trending normal fault structure located approximately 400 m below the injection interval which coincides with the locations of most of the observed micro-seismicity. This structure may also provide a hydrologic connection between EGS well 27-15 and injection/production wells further to the south-southwest. JF - Geothermics AU - Benato, Stefano AU - Hickman, Stephen AU - Davatzes, Nicholas C AU - Taron, Joshua AU - Spielman, Paul AU - Elsworth, Derek AU - Majer, Ernest L AU - Boyle, Katie Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 139 EP - 156 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - United States KW - hydraulic fracturing KW - monitoring KW - well stimulation KW - numerical models KW - geothermal wells KW - mechanical properties KW - geothermal engineering KW - enhanced recovery KW - tensile strength KW - Lyon County Nevada KW - porosity KW - geothermal energy KW - geothermal fields KW - fluid injection KW - seismicity KW - reservoir properties KW - Northern Hot Springs Mountains KW - Desert Peak Field KW - induced earthquakes KW - earthquakes KW - permeability KW - Nevada KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213111?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Conceptual+model+and+numerical+analysis+of+the+Desert+Peak+EGS+project%3B+reservoir+response+to+the+shallow+medium+flow-rate+hydraulic+stimulation+phase&rft.au=Benato%2C+Stefano%3BHickman%2C+Stephen%3BDavatzes%2C+Nicholas+C%3BTaron%2C+Joshua%3BSpielman%2C+Paul%3BElsworth%2C+Derek%3BMajer%2C+Ernest+L%3BBoyle%2C+Katie&rft.aulast=Benato&rft.aufirst=Stefano&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=139&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.06.008 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 56 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - Desert Peak Field; earthquakes; enhanced recovery; fluid injection; geothermal energy; geothermal engineering; geothermal fields; geothermal wells; hydraulic fracturing; induced earthquakes; Lyon County Nevada; mechanical properties; monitoring; Nevada; Northern Hot Springs Mountains; numerical models; permeability; porosity; reservoir properties; seismicity; tensile strength; United States; well stimulation DO - http://dx.doi.org/10.1016/j.geothermics.2015.06.008 ER - TY - JOUR T1 - Enhanced geothermal systems; state of the art AN - 1824213102; 2016-083410 JF - Geothermics Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 252 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - geothermal energy KW - geothermal exploration KW - structural traps KW - traps KW - reservoir properties KW - geothermal engineering KW - enhanced recovery KW - high temperature KW - crust KW - thermal waters KW - temperature KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824213102?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Enhanced+geothermal+systems%3B+state+of+the+art&rft.au=&rft.aulast=&rft.aufirst=&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/ L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Document feature - illus. N1 - SuppNotes - Individual papers are cited separately N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - crust; enhanced recovery; geothermal energy; geothermal engineering; geothermal exploration; high temperature; reservoir properties; structural traps; temperature; thermal waters; traps ER - TY - JOUR T1 - Thermo-poroelastic effects on reservoir seismicity and permeability change AN - 1824212965; 2016-083424 AB - In this paper we study the role of thermo-poromechanical processes on reservoir seismicity and permeability enhancement using theoretical/numerical analysis. The numerical model is fully coupled, considering non-isothermal compressible single-phase fluid flow in fractured porous rock. It combines the thermo-poroelastic displacement discontinuity method, a nonlinear joint deformation model, and a finite difference method for solving the fluid and heat transport in a fracture network. The model is applied to simulate cool water injection into fracture/matrix systems to examine the role of coupled processes on fracture deformation, matrix pore pressure and stress redistributions to assess their role in induced seismicity and permeability variations. The simulation results are analyzed to draw conclusions regarding injection rate dependence of seismicity, and its transience due to coupled processes. Thermal influence on pore pressure and stress tend to promote delayed seismicity. In presence of coupled processes, rock matrix stress perturbations due to natural fracture deformation can be an influencing mechanism for seismicity. Our results show the induced normal stress in the vicinity of the fracture center where injected water enters, can be significant for higher cooling levels in low permeability matrix, and induces additional pore pressure perturbations in the matrix. These couplings have implications for reservoir stimulation and induced seismicity in geothermal reservoirs. The reservoir rock can experience a series of induced stress/pore pressure regimes with continued cooling (under injection). A potentially destabilizing regime is followed by a stabilizing one, and subsequently the rock approaches a destabilizing state. Each situation can result in potentially different levels of MEQ activity. Finally, the impact of thermo-poroelastic stresses on injection/extraction pressure profiles in a fractured rock is illustrated. Injection pressure tends to initially increase in response to poroelastic stress, but with time the thermal effect dominates resulting in fracture aperture increases and lowering of injection pressure. JF - Geothermics AU - Ghassemi, Ahmad AU - Tao, Qingfeng Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 210 EP - 224 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - elasticity KW - in situ KW - poroelasticity KW - thermoelastic properties KW - stress KW - fluid flow KW - mechanical properties KW - mathematical models KW - enhanced recovery KW - fluid dynamics KW - geothermal energy KW - geothermal fields KW - seismicity KW - reservoir properties KW - induced earthquakes KW - earthquakes KW - permeability KW - 19:Seismology KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824212965?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Thermo-poroelastic+effects+on+reservoir+seismicity+and+permeability+change&rft.au=Ghassemi%2C+Ahmad%3BTao%2C+Qingfeng&rft.aulast=Ghassemi&rft.aufirst=Ahmad&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=210&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2016.02.006 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 36 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - earthquakes; elasticity; enhanced recovery; fluid dynamics; fluid flow; geothermal energy; geothermal fields; in situ; induced earthquakes; mathematical models; mechanical properties; permeability; poroelasticity; reservoir properties; seismicity; stress; thermoelastic properties DO - http://dx.doi.org/10.1016/j.geothermics.2016.02.006 ER - TY - JOUR T1 - Results from Newberry Volcano EGS demonstration, 2010-2014 AN - 1824212939; 2016-083415 AB - The Newberry Volcano EGS Demonstration is a 5 year field project designed to demonstrate recent technological advances for engineered geothermal systems (EGS) development. Advances in reservoir stimulation, diverter, and monitoring are being tested in a hot (>300 degrees C), dry well (NWG 55-29) drilled in 2008. These technologies could significantly reduce the cost of electrical power generation from geothermal resources. The project, funded in part by the Department of Energy, began in 2010 with two years of permitting, technical planning, and development of a project-specific Induced Seismicity Mitigation Plan (ISMP). Well stimulation carried out in 2012 indicated that casing repairs were needed; confirmed by further wellbore logging and analysis in 2013. Repairs were completed in August 2014, and the well was re-stimulated in the fall. 9500 m (super 3) (2.5 million gallons) of groundwater were injected at a maximum wellhead pressure of 195 bar (2850 psi) over 4 weeks of hydraulic stimulation. Injectivity changes, thermal profiles and seismicity indicate that fracture permeability in well NWG 55-29 was enhanced. The fifteen-station microseismic array (MSA) located 398 events in 2014, ranging in magnitude from M 0 to M 2.26. Temperature logs run after injection of thermally-degradable zonal isolation material (TZIM) showed that at least two flow zones were blocked and one or two new zones opened because of the injected TZIM. Break-down products of TZIM were detected in flow-back fluids, indicating that the material degraded as predicted. This work demonstrates the viability of large-volume low-pressure stimulation coupled with non-mechanical diverter technology and microseismic monitoring for reservoir mapping. JF - Geothermics AU - Cladouhos, Trenton T AU - Petty, Susan AU - Swyer, Michael W AU - Uddenberg, Matthew E AU - Grasso, Kyla AU - Nordin, Yini Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 44 EP - 61 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - United States KW - well stimulation KW - geothermal wells KW - well-logging KW - pumping KW - characterization KW - Oregon KW - seismicity KW - Newberry Volcano KW - induced earthquakes KW - hydraulic fracturing KW - monitoring KW - mathematical models KW - geothermal engineering KW - enhanced recovery KW - porosity KW - geothermal energy KW - Cascade Range KW - geothermal fields KW - Deschutes County Oregon KW - Newberry Field KW - volcanoes KW - risk assessment KW - reservoir properties KW - earthquakes KW - permeability KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824212939?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Results+from+Newberry+Volcano+EGS+demonstration%2C+2010-2014&rft.au=Cladouhos%2C+Trenton+T%3BPetty%2C+Susan%3BSwyer%2C+Michael+W%3BUddenberg%2C+Matthew+E%3BGrasso%2C+Kyla%3BNordin%2C+Yini&rft.aulast=Cladouhos&rft.aufirst=Trenton&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=44&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.08.009 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 22 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - Cascade Range; characterization; Deschutes County Oregon; earthquakes; enhanced recovery; geothermal energy; geothermal engineering; geothermal fields; geothermal wells; hydraulic fracturing; induced earthquakes; mathematical models; monitoring; Newberry Field; Newberry Volcano; Oregon; permeability; porosity; pumping; reservoir properties; risk assessment; seismicity; United States; volcanoes; well stimulation; well-logging DO - http://dx.doi.org/10.1016/j.geothermics.2015.08.009 ER - TY - JOUR T1 - The Basin and Range Dixie Valley geothermal wellfield, Nevada, USA; a test bed for developing an enhanced geothermal system exploration favorability methodology AN - 1824212928; 2016-083423 AB - The Dixie Valley Geothermal Wellfield (DVGW), a Basin and Range type system in central Nevada USA, is used as an exploration case history for Enhanced Geothermal Systems (EGS). It encompasses an area of approximately 170 km (super 2) . The wellfield produces 67 MW of geothermal power and it contains a number of high temperature non-productive wells. This wellfield was chosen as the calibration site for the development of an EGS exploration methodology due to its extensive body of geoscience data and information on the geothermal system and most importantly, well results in the public domain. This existing body of data (ca. 2011) was in part re-interpreted to produce a baseline conceptual model in terms of a number of serial cross-sections for the available data sets: geology, seismic reflection, resistivity, temperature, gravity-magnetic, and p-wave velocity (Vp). The exploration methodology was calibrated against available geothermal well results. Based on a comprehensive review of all available geoscience and well data, EGS favorability maps were generated, from +1 km above sea level (asl) to -4 km asl at 0.5 km intervals, for the three key EGS parameters of interest: rock type, temperature, and stress. Complimentary trust ("confidence-in-the-data-used") maps were also created at the same scale to, among other things, indicate where additional data may be required. Quantitative geostatistical analysis of the geoscience data was conducted, among other factors, to address the question of whether the baseline geoscience data could be used to predict EGS favorability without the advantage of existing well temperature data. Classification and Regression Tree (CART) was one of a number of geostatistical methods applied to the baseline geoscience data and it provided the most promising results. In CART, the response variable (RV) is predicted while using explanatory variables (EVs). The geoscience parameters (EVs) considered in the CART analysis included temperature, Vp, resistivity from magnetotellurics, Coulomb Stress Change (CSC), dilatational strain (from CSC modeling), vertical stress, lithology based on geologic analysis, lithology based on gravity-magnetic modeling (G-M lithology) and the presence or absence of a fault. Temperature increases with depth in the DVGW. Vertical stress also increases with depth and it was deemed as a redundant EV. As such, a CART sensitivity analysis was applied to the baseline data set with and without vertical stress being considered as an EV to determine the effect of removing vertical stress and to evaluate with subsets of EVs that could be predictive of key EGS parameters. R (super 2) -values ranging from 0.611 to 0.841 were obtained for the RVs: temperature, lithology, productive vs. non-productive hydrothermal cells and expected EGS favorable cells (the response variables) using both cross-section and well data and not considering vertical stress. However, these CART results were not used in the generation of the favorability maps because this is the first analysis of its kind that the authors are aware of and more testing at other sites needs to be done; the raw total baseline data set described above was considered the most appropriate for this study. JF - Geothermics AU - Iovenitti, Joe AU - Ibser, Fletcher Hank AU - Clyne, Matthew AU - Sainsbury, Jon AU - Callahan, Owen A Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 195 EP - 209 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - United States KW - Churchill County Nevada KW - North America KW - Basin and Range Province KW - geothermal wells KW - statistical analysis KW - mapping KW - geostatistics KW - enhanced recovery KW - Dixie Valley Field KW - Dixie Valley KW - temperature KW - hydrothermal conditions KW - geothermal energy KW - geothermal fields KW - geothermal exploration KW - Nevada KW - high temperature KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824212928?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=The+Basin+and+Range+Dixie+Valley+geothermal+wellfield%2C+Nevada%2C+USA%3B+a+test+bed+for+developing+an+enhanced+geothermal+system+exploration+favorability+methodology&rft.au=Iovenitti%2C+Joe%3BIbser%2C+Fletcher+Hank%3BClyne%2C+Matthew%3BSainsbury%2C+Jon%3BCallahan%2C+Owen+A&rft.aulast=Iovenitti&rft.aufirst=Joe&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=195&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2016.01.001 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 38 N1 - Document feature - illus. incl. 2 tables, geol. sketch maps N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - Basin and Range Province; Churchill County Nevada; Dixie Valley; Dixie Valley Field; enhanced recovery; geostatistics; geothermal energy; geothermal exploration; geothermal fields; geothermal wells; high temperature; hydrothermal conditions; mapping; Nevada; North America; statistical analysis; temperature; United States DO - http://dx.doi.org/10.1016/j.geothermics.2016.01.001 ER - TY - JOUR T1 - Hydraulic history and current state of the deep geothermal reservoir Gross Schoenebeck AN - 1824212918; 2016-083414 AB - This study addresses the thermal-hydraulic-mechanical and chemical (THMC) behavior of a research well doublet consisting of the injection well E GrSk 3/90 and the production well Gt GrSk 4/05 A(2) in the deep geothermal reservoir of Gross Schoenebeck (north of Berlin, Germany). The reservoir is located between 3815 and 4247 m below sea level in the Lower Permian of the North German Basin (NGB). Both wells were hydraulically stimulated to enhance productivity. For the production well three stimulation treatments were performed in 2007: these three treatments result in a productivity increase from 2.4 m (super 3) /(h MPa) to 14.7 m (super 3) /(h MPa). The injection well was stimulated four times in 2002/2003, resulting in a corresponding productivity increase from 0.97 m (super 3) /(h MPa) to 7.5 m (super 3) /(h MPa). The necessary infrastructure for production and subsequent injection of geothermal fluid was established in June 2011. Between June 8, 2011 and November 8, 2013, 139 individual hydraulic tests were performed with produced/injected volumes ranging from 4.4 to 2567 m (super 3) . The productivity index decreased non-linearly from 8.9 m (super 3) /(h MPa) on June 8, 2011 to 0.6 m (super 3) /(h MPa) on November 8, 2013. Five possible reasons for the productivity decrease are discussed: wellbore fill, wellbore skin, the sustainability of induced fractures, two phase flow and compartmentalization. For all hydraulic tests, the injectivity index remains almost constant at 4.0 m (super 3) /(h MPa). During 17 of 139 hydraulic tests a sudden increase of the productivity was observed. Possible reasons for this effect are discussed: accumulation of free gas and/or fines and scales within the fracture as well as changing hydraulic properties due to changing mechanical load on the fracture. JF - Geothermics AU - Bloecher, Guido AU - Reinsch, Thomas AU - Henninges, Jan AU - Milsch, Harald AU - Regenspurg, Simona AU - Kummerow, Juliane AU - Francke, Henning AU - Kranz, Stefan AU - Saadat, Ali AU - Zimmermann, Guenter AU - Huenges, Ernst Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 27 EP - 43 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - hydraulic fracturing KW - Gross Schoenebeck Field KW - mathematical models KW - geothermal engineering KW - Europe KW - enhanced recovery KW - fluid dynamics KW - history KW - geothermal energy KW - geothermal fields KW - fluid injection KW - Central Europe KW - Brandenburg Germany KW - thermomechanical properties KW - reservoir properties KW - Germany KW - North German Basin KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824212918?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Hydraulic+history+and+current+state+of+the+deep+geothermal+reservoir+Gross+Schoenebeck&rft.au=Bloecher%2C+Guido%3BReinsch%2C+Thomas%3BHenninges%2C+Jan%3BMilsch%2C+Harald%3BRegenspurg%2C+Simona%3BKummerow%2C+Juliane%3BFrancke%2C+Henning%3BKranz%2C+Stefan%3BSaadat%2C+Ali%3BZimmermann%2C+Guenter%3BHuenges%2C+Ernst&rft.aulast=Bloecher&rft.aufirst=Guido&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=27&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.07.008 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 37 N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - Brandenburg Germany; Central Europe; enhanced recovery; Europe; fluid dynamics; fluid injection; geothermal energy; geothermal engineering; geothermal fields; Germany; Gross Schoenebeck Field; history; hydraulic fracturing; mathematical models; North German Basin; reservoir properties; thermomechanical properties DO - http://dx.doi.org/10.1016/j.geothermics.2015.07.008 ER - TY - JOUR T1 - Petrothermal and aquifer-based EGS in the northern German sedimentary basin, investigated by conservative tracers during single-well injection-flowback and production tests AN - 1824212897; 2016-083425 AB - The use of artificial tracers in single-well tests in conjunction with EGS-related fracturing or stimulation of sedimentary and crystalline formations in the Northern German Basin is evaluated. Conservative-tracer signal analysis is suggested as a tool to quantify individual fracture contributions to multiple-fracture discharge, and illustrated with preliminary data from the Gross Schoenebeck site. The proposed approach helps to avoid investing in unnecessary wellbore completion-integrated devices used for inflow profiling, especially when the productivity of the target formation is uncertain. Conservative-tracer signal analysis is further applied to estimate the thermal-lifetime contributions from the petrothermal and the aquifer components of a hybrid EGS developed in sedimentary formations at the Horstberg site. Long-term observation of tracer signals is recommended for both sites. JF - Geothermics AU - Ghergut, Julia AU - Behrens, Horst AU - Sauter, Martin Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 225 EP - 241 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - monitoring KW - sedimentary basins KW - characterization KW - sandstone KW - mathematical models KW - geothermal engineering KW - Europe KW - enhanced recovery KW - fluid dynamics KW - geothermal energy KW - geothermal fields KW - sedimentary rocks KW - Central Europe KW - tracers KW - basins KW - Germany KW - Horstberg Field KW - clastic rocks KW - North German Basin KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824212897?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Petrothermal+and+aquifer-based+EGS+in+the+northern+German+sedimentary+basin%2C+investigated+by+conservative+tracers+during+single-well+injection-flowback+and+production+tests&rft.au=Ghergut%2C+Julia%3BBehrens%2C+Horst%3BSauter%2C+Martin&rft.aulast=Ghergut&rft.aufirst=Julia&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=225&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2016.01.015 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 62 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - basins; Central Europe; characterization; clastic rocks; enhanced recovery; Europe; fluid dynamics; geothermal energy; geothermal engineering; geothermal fields; Germany; Horstberg Field; mathematical models; monitoring; North German Basin; sandstone; sedimentary basins; sedimentary rocks; tracers DO - http://dx.doi.org/10.1016/j.geothermics.2016.01.015 ER - TY - JOUR T1 - Geomechanical characterization of Newberry tuff AN - 1824212884; 2016-083417 AB - In this paper we present the results of a petrophysical and geomechanical characterization program focusing on the rock mechanical properties of welded tuffs from Newberry Volcano, Oregon. The rock samples are from drill cores obtained from three wells in the vicinity of the Newberry EGS namely, GEO N-2, GEO N-1, and OXY 72-3. As part of the rock characterization process, petrographic thin sections were prepared and used to describe rock texture and mineralogy. High resolution X-ray CT scanner was also used to provide 3D images of the rock pore structure. Rock porosity and permeability were measured using the gas expansion method and a pulse permeameter, respectively. Triaxial compression tests were performed on the specimens extracted from whole core to determine their Young's modulus, Poisson's ratio, and failure envelopes. In particular, multistage triaxial compression tests were carried out to determine deformation and failure properties, and to establish relationships between petrophysical and mechanical/failure properties. In addition, multistage triaxial shear tests were performed to determine the mechanical properties and shear strengths of the fractures developed in triaxial compression tests. Joint roughness coefficient (JRC) and Joint Wall Compressive Strength (JCS) were obtained through analysis of the shear tests. Joint normal stiffness and shear stiffness were also estimated and it was observed that a higher confining pressure results in higher joint shear stiffness. These studies provide insight into the effects of mineralogy and texture and structure on the strength and deformation properties of the tuff samples tested. Mineral composition and the presence of phenocrysts, argillitic materials, and natural fracture were noted to impact rock mechanical properties. Natural fracture and vein mineralogy also influence fracture development in the samples as well as frictional and shear strength properties of the joints tested. Rock samples with higher clay mineral content were found to be relatively more ductile with minimal increase, or even decrease, in permeability under failure in compression tests. The data set obtained in this study is very useful for stimulation design and interpretation of observed micro-seismicity in relation to permeability enhancement. JF - Geothermics AU - Wang, Jihoon AU - Jung, Woodong AU - Li, Yawei AU - Ghassemi, Ahmad Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 74 EP - 96 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - United States KW - shear strength KW - volcanic rocks KW - igneous rocks KW - characterization KW - triaxial tests KW - rock mechanics KW - Oregon KW - sedimentary rocks KW - Newberry Volcano KW - tuff KW - hydraulic fracturing KW - argillite KW - mechanical properties KW - geothermal engineering KW - porosity KW - geothermal energy KW - Cascade Range KW - pyroclastics KW - geothermal fields KW - geothermal exploration KW - Deschutes County Oregon KW - Newberry Field KW - reservoir properties KW - compressive strength KW - clastic rocks KW - permeability KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824212884?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Geomechanical+characterization+of+Newberry+tuff&rft.au=Wang%2C+Jihoon%3BJung%2C+Woodong%3BLi%2C+Yawei%3BGhassemi%2C+Ahmad&rft.aulast=Wang&rft.aufirst=Jihoon&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=74&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2016.01.016 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 17 N1 - Document feature - illus. incl. 7 tables, geol. sketch maps N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - argillite; Cascade Range; characterization; clastic rocks; compressive strength; Deschutes County Oregon; geothermal energy; geothermal engineering; geothermal exploration; geothermal fields; hydraulic fracturing; igneous rocks; mechanical properties; Newberry Field; Newberry Volcano; Oregon; permeability; porosity; pyroclastics; reservoir properties; rock mechanics; sedimentary rocks; shear strength; triaxial tests; tuff; United States; volcanic rocks DO - http://dx.doi.org/10.1016/j.geothermics.2016.01.016 ER - TY - JOUR T1 - Physical performance indicators for HDR/EGS projects AN - 1824212595; 2016-083411 AB - Three physical parameters are reviewed for HDR/EGS projects: recovery factor, reservoir impedance, and tracer-swept volume as a fraction of the rock volume delineated by acoustic emissions (AE). The first and third parameters are indicators of how extensively the reservoir is reached by the injected fluid, and the second one is a mechanical requirement for effective operation. JF - Geothermics AU - Grant, Malcolm A Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 2 EP - 4 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - geothermal energy KW - physical properties KW - fluid injection KW - global KW - reservoir properties KW - mathematical models KW - enhanced recovery KW - hot dry rocks KW - indicators KW - porosity KW - permeability KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824212595?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Physical+performance+indicators+for+HDR%2FEGS+projects&rft.au=Grant%2C+Malcolm+A&rft.aulast=Grant&rft.aufirst=Malcolm&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=2&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.01.004 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 22 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - enhanced recovery; fluid injection; geothermal energy; global; hot dry rocks; indicators; mathematical models; permeability; physical properties; porosity; reservoir properties DO - http://dx.doi.org/10.1016/j.geothermics.2015.01.004 ER - TY - JOUR T1 - Lessons learned from the pioneering hot dry rock project at Fenton Hill, USA AN - 1824212569; 2016-083412 AB - Interest in geothermal energy production has grown rapidly in recent years due to the increasing demand for clean, renewable, domestic energy. Recent publications have suggested that geothermal energy from Enhanced Geothermal Systems could satisfy a large portion of the energy needs in the U.S. if the technology were implemented on a large scale. Pertinent to this goal are many of the lessons learned from the pioneering Hot Dry Rock project aimed at producing usable energy form the heat of the earth, conducted from 1970 to 1995 at Fenton Hill, New Mexico, USA. During this project, the Los Alamos National Laboratory created and tested two reservoirs at depths in the range of 2.8-3.5 km in crystalline rock formations underlying the Fenton Hill site. Thermal energies in the range of 3-10 MWt were produced demonstrating the technical feasibility of the concept. Many important lessons were learned regarding the creation, engineering and operation of such subsurface systems-these lessons will prove valuable as the geothermal community moves towards the goal of realizing the immense potential of this ubiquitous renewable energy resource. The purpose of this paper is to provide a brief, easy to read overview of this pioneering project. JF - Geothermics AU - Kelkar, Sharad AU - WoldeGabriel, Giday AU - Rehfeldt, Kenneth Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 5 EP - 14 PB - Elsevier, Oxford-New York VL - 63 SN - 0375-6505, 0375-6505 KW - United States KW - North America KW - experimental studies KW - well stimulation KW - site exploration KW - Sandoval County New Mexico KW - Jemez Field KW - enhanced recovery KW - New Mexico KW - hot dry rocks KW - volcanic fields KW - Rio Grande Rift KW - history KW - geothermal energy KW - geothermal fields KW - Fenton Hill KW - microseisms KW - reservoir properties KW - hydraulic conductivity KW - permeability KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824212569?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Lessons+learned+from+the+pioneering+hot+dry+rock+project+at+Fenton+Hill%2C+USA&rft.au=Kelkar%2C+Sharad%3BWoldeGabriel%2C+Giday%3BRehfeldt%2C+Kenneth&rft.aulast=Kelkar&rft.aufirst=Sharad&rft.date=2016-09-01&rft.volume=63&rft.issue=&rft.spage=5&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2015.08.008 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 75 N1 - Document feature - illus. incl. geol. sketch maps N1 - Last updated - 2016-09-29 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - enhanced recovery; experimental studies; Fenton Hill; geothermal energy; geothermal fields; history; hot dry rocks; hydraulic conductivity; Jemez Field; microseisms; New Mexico; North America; permeability; reservoir properties; Rio Grande Rift; Sandoval County New Mexico; site exploration; United States; volcanic fields; well stimulation DO - http://dx.doi.org/10.1016/j.geothermics.2015.08.008 ER - TY - JOUR T1 - Automated contact angle estimation for three-dimensional X-ray microtomography data AN - 1819134482; PQ0003630882 AB - Multiphase flow in capillary regimes is a fundamental process in a number of geoscience applications. The ability to accurately define wetting characteristics of porous media can have a large impact on numerical models. In this paper, a newly developed automated three-dimensional contact angle algorithm is described and applied to high-resolution X-ray microtomography data from multiphase bead pack experiments with varying wettability characteristics. The algorithm calculates the contact angle by finding the angle between planes fit to each solid/fluid and fluid/fluid interface in the region surrounding each solid/fluid/fluid contact point. Results show that the algorithm is able to reliably compute contact angles using the experimental data. The in situ contact angles are typically larger than flat surface laboratory measurements using the same material. Wetting characteristics in mixed-wet systems also change significantly after displacement cycles. JF - Advances in Water Resources AU - Klise, Katherine A AU - Moriarty, Dylan AU - Yoon, Hongkyu AU - Karpyn, Zuleima AD - Geoscience Research and Applications Group, Sandia National Laboratories, Albuquerque, NM 87185, United States Y1 - 2016/09// PY - 2016 DA - September 2016 SP - 152 EP - 160 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 95 SN - 0309-1708, 0309-1708 KW - Environment Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Meteorological & Geoastrophysical Abstracts KW - Contact angle KW - Multiphase KW - Wettability KW - X-ray microtomography KW - Hydrological Regime KW - Experimental Data KW - Mathematical models KW - Porous Media KW - Algorithms KW - Water resources KW - Solids KW - Multiphase flow KW - Multiphase Flow KW - Numerical models KW - Water Resources KW - Modelling KW - AQ 00001:Water Resources and Supplies KW - M2 551.507:Carriers (551.507) KW - Q2 09102:Institutes and organizations KW - SW 0810:General KW - ENA 16:Renewable Resources-Water UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819134482?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=Automated+contact+angle+estimation+for+three-dimensional+X-ray+microtomography+data&rft.au=Klise%2C+Katherine+A%3BMoriarty%2C+Dylan%3BYoon%2C+Hongkyu%3BKarpyn%2C+Zuleima&rft.aulast=Klise&rft.aufirst=Katherine&rft.date=2016-09-01&rft.volume=95&rft.issue=&rft.spage=152&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/10.1016%2Fj.advwatres.2015.11.006 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-09-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Mathematical models; Water resources; Multiphase flow; Modelling; Numerical models; Algorithms; Experimental Data; Hydrological Regime; Porous Media; Solids; Multiphase Flow; Water Resources DO - http://dx.doi.org/10.1016/j.advwatres.2015.11.006 ER - TY - JOUR T1 - Detection of the Wenchuan Aftershock Sequence Using Waveform Correlation with a Composite Regional Network AN - 1811877614; PQ0003521198 AB - Using template waveforms from aftershocks of the Wenchuan earthquake (12 May 2008, Ms 7.9) listed in a global bulletin and continuous data from eight regional stations, we detected more than 6000 additional events in the mainshock source region from 1 May to 12 August 2008. These new detections obey Omori's law, extend the magnitude of completeness downward by 1.1 magnitude units, and lead to a more than fivefold increase in number of known aftershocks compared with the global bulletins published by the International Data Centre and the International Seismological Centre. Moreover, we detected more M>2 events than were listed by the Sichuan Seismograph Network. Several clusters of these detections were then relocated using the double-difference method, yielding locations that reduced travel-time residuals by a factor of 32 compared with the initial bulletin locations. Our results suggest that using waveform correlation on a few regional stations can find aftershock events very effectively and locate them with precision. JF - Bulletin of the Seismological Society of America. Berkeley CA AU - Slinkard, Megan AU - Heck, Stephen AU - Schaff, David AU - Bonal, Nedra AU - Daily, David AU - Young, Christopher AU - Richards, Paul AD - Sandia National Laboratories, P.O.Box 5800 MS0404, Albuquerque, New Mexico 87185-0404, meslink@sandia.gov Y1 - 2016/08/28/ PY - 2016 DA - 2016 Aug 28 SP - 1371 EP - 1379 PB - Seismological Society of America VL - 106 IS - 4 SN - 0037-1106, 0037-1106 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Earthquakes KW - Seismographs KW - Information centres KW - Seismic activity KW - International law KW - Templates KW - Methodology KW - Q2 09270:Seismology KW - SW 0810:General KW - ENA 08:International UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1811877614?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America.+Berkeley+CA&rft.atitle=Detection+of+the+Wenchuan+Aftershock+Sequence+Using+Waveform+Correlation+with+a+Composite+Regional+Network&rft.au=Slinkard%2C+Megan%3BHeck%2C+Stephen%3BSchaff%2C+David%3BBonal%2C+Nedra%3BDaily%2C+David%3BYoung%2C+Christopher%3BRichards%2C+Paul&rft.aulast=Slinkard&rft.aufirst=Megan&rft.date=2016-08-28&rft.volume=106&rft.issue=4&rft.spage=1371&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America.+Berkeley+CA&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150333 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Earthquakes; Information centres; International law; Templates; Methodology; Seismic activity; Seismographs DO - http://dx.doi.org/10.1785/0120150333 ER - TY - JOUR T1 - Geological disposal of nuclear waste in tuff; Yucca Mountain (USA) AN - 1844923584; 2016-101620 AB - For more than three decades, the US Department of Energy has investigated the potential for permanent disposal of high-level radioactive waste and spent nuclear fuel in a deep-mined repository at Yucca Mountain, Nevada (USA). A detailed license application submitted to the US Nuclear Regulatory Commission in 2008 provides full documentation of the case for permanent disposal of nuclear waste in tuff. The aridity of the site and great depth to the water table provide a disposal environment and a design concept unique among deep-mined repositories currently or previously proposed worldwide. JF - Elements AU - Swift, Peter N AU - Bonano, Evaristo J Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 263 EP - 268 PB - Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society VL - 12 IS - 4 SN - 1811-5209, 1811-5209 KW - United States KW - U. S. Department of Energy KW - terrestrial environment KW - volcanic rocks KW - engineering properties KW - site exploration KW - igneous rocks KW - regulations KW - government agencies KW - reservoir rocks KW - radioactive waste KW - ground water KW - seismicity KW - isolation KW - volcanism KW - tuff KW - Yucca Mountain KW - Nevada KW - corrosion KW - U. S. Nuclear Regulatory Commission KW - high-level waste KW - arid environment KW - spent fuel KW - Nye County Nevada KW - depth KW - water table KW - pyroclastics KW - safety KW - waste disposal KW - design KW - 30:Engineering geology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1844923584?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Elements&rft.atitle=Geological+disposal+of+nuclear+waste+in+tuff%3B+Yucca+Mountain+%28USA%29&rft.au=Swift%2C+Peter+N%3BBonano%2C+Evaristo+J&rft.aulast=Swift&rft.aufirst=Peter&rft.date=2016-08-01&rft.volume=12&rft.issue=4&rft.spage=263&rft.isbn=&rft.btitle=&rft.title=Elements&rft.issn=18115209&rft_id=info:doi/10.2113%2Fgselements.12.4.263 L2 - http://www.elementsmagazine.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 19 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-12-01 N1 - SubjectsTermNotLitGenreText - arid environment; corrosion; depth; design; engineering properties; government agencies; ground water; high-level waste; igneous rocks; isolation; Nevada; Nye County Nevada; pyroclastics; radioactive waste; regulations; reservoir rocks; safety; seismicity; site exploration; spent fuel; terrestrial environment; tuff; U. S. Department of Energy; U. S. Nuclear Regulatory Commission; United States; volcanic rocks; volcanism; waste disposal; water table; Yucca Mountain DO - http://dx.doi.org/10.2113/gselements.12.4.263 ER - TY - JOUR T1 - Detection of the Wenchuan aftershock sequence using waveform correlation with a composite regional network AN - 1824214133; 2016-085211 AB - Using template waveforms from aftershocks of the Wenchuan earthquake (12 May 2008, M (sub s) 7.9) listed in a global bulletin and continuous data from eight regional stations, we detected more than 6000 additional events in the mainshock source region from 1 May to 12 August 2008. These new detections obey Omori's law, extend the magnitude of completeness downward by 1.1 magnitude units, and lead to a more than fivefold increase in number of known aftershocks compared with the global bulletins published by the International Data Centre and the International Seismological Centre. Moreover, we detected more M>2 events than were listed by the Sichuan Seismograph Network. Several clusters of these detections were then relocated using the double-difference method, yielding locations that reduced travel-time residuals by a factor of 32 compared with the initial bulletin locations. Our results suggest that using waveform correlation on a few regional stations can find aftershock events very effectively and locate them with precision. JF - Bulletin of the Seismological Society of America AU - Slinkard, Megan AU - Heck, Stephen AU - Schaff, David AU - Bonal, Nedra AU - Daily, David AU - Young, Christopher AU - Richards, Paul Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 1371 EP - 1379 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 4 SN - 0037-1106, 0037-1106 KW - technology KW - Far East KW - double-difference method KW - Omori's law KW - magnitude KW - Sichuan China KW - correlation KW - information management KW - data management KW - aftershocks KW - rupture KW - Wenchuan earthquake 2008 KW - seismic networks KW - Asia KW - earthquakes KW - China KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824214133?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Detection+of+the+Wenchuan+aftershock+sequence+using+waveform+correlation+with+a+composite+regional+network&rft.au=Slinkard%2C+Megan%3BHeck%2C+Stephen%3BSchaff%2C+David%3BBonal%2C+Nedra%3BDaily%2C+David%3BYoung%2C+Christopher%3BRichards%2C+Paul&rft.aulast=Slinkard&rft.aufirst=Megan&rft.date=2016-08-01&rft.volume=106&rft.issue=4&rft.spage=1371&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150333 L2 - http://bssa.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 32 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-29 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - aftershocks; Asia; China; correlation; data management; double-difference method; earthquakes; Far East; information management; magnitude; Omori's law; rupture; seismic networks; Sichuan China; technology; Wenchuan earthquake 2008 DO - http://dx.doi.org/10.1785/0120150333 ER - TY - JOUR T1 - Origin and heterogeneity of pore sizes in the Mount Simon Sandstone and Eau Claire Formation; implications for multiphase fluid flow AN - 1815667754; 2016-076864 AB - The Mount Simon Sandstone and Eau Claire Formation represent a potential reservoir-caprock system for wastewater disposal, geologic CO (sub 2) storage, and compressed air energy storage (CAES) in the Midwestern United States. A primary concern to site performance is heterogeneity in rock properties that could lead to nonideal injectivity and distribution of injected fluids (e.g., poor sweep efficiency). Using core samples from the Dallas Center domal structure, Iowa, we investigate pore characteristics that govern flow properties of major lithofacies of these formations. Methods include gas porosimetry and permeametry, mercury intrusion porosimetry, thin section petrography, and X-ray diffraction. The lithofacies exhibit highly variable intraformational and interformational distributions of pore throat and body sizes. Based on pore-throat size, there are four distinct sample groups. Micropore-throat-dominated samples are from the Eau Claire Formation, whereas the macropore-dominated, mesopore-dominated, and uniform-dominated samples are from the Mount Simon Sandstone. Complex paragenesis governs the high degree of pore and pore-throat size heterogeneity, due to an interplay of precipitation, nonuniform compaction, and later dissolution of cements. The cement dissolution event probably accounts for much of the current porosity in the unit. Mercury intrusion porosimetry data demonstrate that the heterogeneous nature of the pore networks in the Mount Simon Sandstone results in a greater than normal opportunity for reservoir capillary trapping of nonwetting fluids, as quantified by CO (sub 2) and air column heights that vary over three orders of magnitude, which should be taken into account when assessing the potential of the reservoir-caprock system for waste disposal (CO (sub 2) or produced water) and resource storage (natural gas and compressed air). Our study quantitatively demonstrates the significant impact of millimeter-scale to micron-scale porosity heterogeneity on flow and transport in reservoir sandstones. JF - Geosphere (Boulder, CO) AU - Mozley, Peter S AU - Heath, Jason E AU - Dewers, Thomas A AU - Bauer, Stephen J Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 1341 EP - 1361 PB - Geological Society of America, Boulder, CO VL - 12 IS - 4 KW - United States KW - X-ray diffraction data KW - sandstone KW - Mount Simon Sandstone KW - Dallas County Iowa KW - thin sections KW - Iowa KW - Cambrian KW - reservoir rocks KW - Upper Cambrian KW - fractures KW - sedimentary rocks KW - mineral composition KW - Eau Claire Formation KW - heterogeneity KW - sealing KW - well logs KW - Paleozoic KW - overgrowths KW - fluid flow KW - porosity KW - paragenesis KW - central Iowa KW - multiphase flow KW - cap rocks KW - reservoir properties KW - clastic rocks KW - permeability KW - 29A:Economic geology, geology of energy sources KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815667754?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geosphere+%28Boulder%2C+CO%29&rft.atitle=Origin+and+heterogeneity+of+pore+sizes+in+the+Mount+Simon+Sandstone+and+Eau+Claire+Formation%3B+implications+for+multiphase+fluid+flow&rft.au=Mozley%2C+Peter+S%3BHeath%2C+Jason+E%3BDewers%2C+Thomas+A%3BBauer%2C+Stephen+J&rft.aulast=Mozley&rft.aufirst=Peter&rft.date=2016-08-01&rft.volume=12&rft.issue=4&rft.spage=1341&rft.isbn=&rft.btitle=&rft.title=Geosphere+%28Boulder%2C+CO%29&rft.issn=1553-040X&rft_id=info:doi/10.1130%2FGES01245.1 L2 - http://geosphere.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 62 N1 - PubXState - CO N1 - Document feature - illus. incl. 3 tables, sketch map N1 - Last updated - 2016-09-01 N1 - SubjectsTermNotLitGenreText - Cambrian; cap rocks; central Iowa; clastic rocks; Dallas County Iowa; Eau Claire Formation; fluid flow; fractures; heterogeneity; Iowa; mineral composition; Mount Simon Sandstone; multiphase flow; overgrowths; Paleozoic; paragenesis; permeability; porosity; reservoir properties; reservoir rocks; sandstone; sealing; sedimentary rocks; thin sections; United States; Upper Cambrian; well logs; X-ray diffraction data DO - http://dx.doi.org/10.1130/GES01245.1 ER - TY - JOUR T1 - A disposable, continuous-flow polymerase chain reaction device: design, fabrication and evaluation AN - 1808718455; PQ0003469933 AB - Polymerase Chain Reaction (PCR) is used to amplify a specific segment of DNA through a thermal cycling protocol. The PCR industry is shifting its focus away from macro-scale systems and towards micro-scale devices because: micro-scale sample sizes require less blood from patients, total reaction times are on the order of minutes opposed to hours, and there are cost advantages as many microfluidic devices are manufactured from inexpensive polymers. Some of the fastest PCR devices use continuous flow, but they have all been built of silicon or glass to allow sufficient heat transfer. This article presents a disposable polycarbonate (PC) device that is capable of achieving real-time, continuous flow PCR in a completely disposable polymer device in less than 13 minutes by thermally cycling the sample through an established temperature gradient in a serpentine channel. The desired temperature gradient was determined through simulations and validated by experiments which showed that PCR was achieved. Practical demonstration included amplification of foot-and-mouth disease virus (FMDV) derived cDNA. JF - Biomedical Microdevices AU - Ragsdale, Victoria AU - Li, Huizhong AU - Sant, Himanshu AU - Ameel, Tim AU - Gale, Bruce K AD - Sandia National Laboratories, Albuquerque, NM, USA, bruce.gale@utah.edu Y1 - 2016/08// PY - 2016 DA - August 2016 SP - 1 EP - 9 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 18 IS - 4 SN - 1387-2176, 1387-2176 KW - Biotechnology and Bioengineering Abstracts KW - Temperature effects KW - Blood KW - Microfluidics KW - Silicon KW - Foot-and-mouth disease virus KW - Polymerase chain reaction KW - Foot-and-mouth disease KW - polycarbonate KW - Heat transfer KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808718455?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biomedical+Microdevices&rft.atitle=A+disposable%2C+continuous-flow+polymerase+chain+reaction+device%3A+design%2C+fabrication+and+evaluation&rft.au=Ragsdale%2C+Victoria%3BLi%2C+Huizhong%3BSant%2C+Himanshu%3BAmeel%2C+Tim%3BGale%2C+Bruce+K&rft.aulast=Ragsdale&rft.aufirst=Victoria&rft.date=2016-08-01&rft.volume=18&rft.issue=4&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Biomedical+Microdevices&rft.issn=13872176&rft_id=info:doi/10.1007%2Fs10544-016-0091-x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Number of references - 27 N1 - Last updated - 2016-08-17 N1 - SubjectsTermNotLitGenreText - Temperature effects; Blood; Silicon; Microfluidics; Polymerase chain reaction; polycarbonate; Foot-and-mouth disease; Heat transfer; Foot-and-mouth disease virus DO - http://dx.doi.org/10.1007/s10544-016-0091-x ER - TY - JOUR T1 - Origin and implications of non-radial Imbrium Sculpture on the Moon AN - 1812216263; 2016-070831 JF - Nature (London) AU - Schultz, Peter H AU - Crawford, David A Y1 - 2016/07/21/ PY - 2016 DA - 2016 Jul 21 SP - 391 EP - 394 PB - Macmillan Journals, London VL - 535 IS - 7612 SN - 0028-0836, 0028-0836 KW - numerical models KW - impact features KW - Moon KW - impacts KW - simulation KW - Imbrium Sculpture KW - grooves KW - bedding plane irregularities KW - Gravity Recovery and Interior Laboratory Mission KW - Mare Imbrium KW - craters KW - surface features KW - interplanetary comparison KW - impact craters KW - sedimentary structures KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812216263?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+%28London%29&rft.atitle=Origin+and+implications+of+non-radial+Imbrium+Sculpture+on+the+Moon&rft.au=Schultz%2C+Peter+H%3BCrawford%2C+David+A&rft.aulast=Schultz&rft.aufirst=Peter&rft.date=2016-07-21&rft.volume=535&rft.issue=7612&rft.spage=391&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1030%2Fnature18278 L2 - http://www.nature.com/nature/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 22 N1 - Document feature - illus. N1 - Last updated - 2016-12-16 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - bedding plane irregularities; craters; Gravity Recovery and Interior Laboratory Mission; grooves; Imbrium Sculpture; impact craters; impact features; impacts; interplanetary comparison; Mare Imbrium; Moon; numerical models; sedimentary structures; simulation; surface features DO - http://dx.doi.org/10.1038/nature18278 ER - TY - JOUR T1 - Pickless event detection and location; the Waveform Correlation Event-Detection System (WCEDS) revisited AN - 1828850131; 2016-087246 AB - The standard seismic explosion-monitoring paradigm is based on a sparse, spatially aliased network of stations to monitor either the whole Earth or a region of interest. Under this paradigm, state-of-the-art event-detection methods are based on seismic phase picks, which are associated at multiple stations and located using 3D Earth models. Here, we revisit a concept for event-detection that does not require phase picks or 3D models and fuses detection and association into a single algorithm. Our pickless event detector exploits existing catalog and waveform data to build an empirical stack of the full regional seismic wavefield, which is subsequently used to detect and locate events at a network level using correlation techniques. We apply our detector to seismic data from Utah and evaluate our results by comparing them with the earthquake catalog published by the University of Utah Seismograph Stations. The results demonstrate that our pickless detector is a viable alternative technique for detecting events that likely requires less analyst overhead than do the existing methods. JF - Bulletin of the Seismological Society of America AU - Arrowsmith, Stephen AU - Young, Christopher AU - Ballard, Sanford AU - Slinkard, Megan AU - Pankow, Kristine Y1 - 2016/07/19/ PY - 2016 DA - 2016 Jul 19 SP - 2037 EP - 2044 PB - Seismological Society of America, Berkeley, CA VL - 106 IS - 5 SN - 0037-1106, 0037-1106 KW - United States KW - technology KW - monitoring KW - three-dimensional models KW - explosions KW - magnitude KW - prediction KW - elastic waves KW - waveforms KW - seismographs KW - seismic sources KW - detection KW - seismicity KW - traveltime KW - propagation KW - Utah KW - algorithms KW - earthquakes KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828850131?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Pickless+event+detection+and+location%3B+the+Waveform+Correlation+Event-Detection+System+%28WCEDS%29+revisited&rft.au=Arrowsmith%2C+Stephen%3BYoung%2C+Christopher%3BBallard%2C+Sanford%3BSlinkard%2C+Megan%3BPankow%2C+Kristine&rft.aulast=Arrowsmith&rft.aufirst=Stephen&rft.date=2016-07-19&rft.volume=106&rft.issue=5&rft.spage=2037&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120160018 L2 - http://bssa.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 13 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2017-01-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; detection; earthquakes; elastic waves; explosions; instruments; magnitude; monitoring; prediction; propagation; seismic sources; seismicity; seismographs; technology; three-dimensional models; traveltime; United States; Utah; waveforms DO - http://dx.doi.org/10.1785/0120160018 ER - TY - JOUR T1 - Helium release during shale deformation; experimental validation AN - 1869032531; 2017-009959 AB - This work describes initial experimental results of helium tracer release monitoring during deformation of shale. Naturally occurring radiogenic (super 4) He is present in high concentration in most shales. During rock deformation, accumulated helium could be released as fractures are created and new transport pathways are created. We present the results of an experimental study in which confined reservoir shale samples, cored parallel and perpendicular to bedding, which were initially saturated with helium to simulate reservoir conditions, are subjected to triaxial compressive deformation. During the deformation experiment, differential stress, axial, and radial strains are systematically tracked. Release of helium is dynamically measured using a helium mass spectrometer leak detector. Helium released during deformation is observable at the laboratory scale and the release is tightly coupled to the shale deformation. These first measurements of dynamic helium release from rocks undergoing deformation show that helium provides information on the evolution of microstructure as a function of changes in stress and strain. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Geochemistry, Geophysics, Geosystems - G3 AU - Bauer, Stephen J AU - Gardner, W Payton AU - Heath, Jason E Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 2612 EP - 2622 PB - American Geophysical Union and The Geochemical Society VL - 17 IS - 7 KW - experimental studies KW - isotopes KW - shale KW - techniques KW - mass spectroscopy KW - He-4 KW - deformation KW - triaxial tests KW - stable isotopes KW - rock mechanics KW - sedimentary rocks KW - noble gases KW - helium KW - spectroscopy KW - clastic rocks KW - instruments KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869032531?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochemistry%2C+Geophysics%2C+Geosystems+-+G3&rft.atitle=Helium+release+during+shale+deformation%3B+experimental+validation&rft.au=Bauer%2C+Stephen+J%3BGardner%2C+W+Payton%3BHeath%2C+Jason+E&rft.aulast=Bauer&rft.aufirst=Stephen&rft.date=2016-07-01&rft.volume=17&rft.issue=7&rft.spage=2612&rft.isbn=&rft.btitle=&rft.title=Geochemistry%2C+Geophysics%2C+Geosystems+-+G3&rft.issn=1525-2027&rft_id=info:doi/10.1002%2F2016GC006352 L2 - http://g-cubed.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom | Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2017-01-01 N1 - Number of references - 25 N1 - Document feature - illus. N1 - Last updated - 2017-02-17 N1 - SubjectsTermNotLitGenreText - clastic rocks; deformation; experimental studies; He-4; helium; instruments; isotopes; mass spectroscopy; noble gases; rock mechanics; sedimentary rocks; shale; spectroscopy; stable isotopes; techniques; triaxial tests DO - http://dx.doi.org/10.1002/2016GC006352 ER - TY - JOUR T1 - Scalable subsurface inverse modeling of huge data sets with an application to tracer concentration breakthrough data from magnetic resonance imaging AN - 1844922505; 2016-101563 AB - Characterizing subsurface properties is crucial for reliable and cost-effective groundwater supply management and contaminant remediation. With recent advances in sensor technology, large volumes of hydrogeophysical and geochemical data can be obtained to achieve high-resolution images of subsurface properties. However, characterization with such a large amount of information requires prohibitive computational costs associated with "big data" processing and numerous large-scale numerical simulations. To tackle such difficulties, the principal component geostatistical approach (PCGA) has been proposed as a "Jacobian-free" inversion method that requires much smaller forward simulation runs for each iteration than the number of unknown parameters and measurements needed in the traditional inversion methods. PCGA can be conveniently linked to any multiphysics simulation software with independent parallel executions. In this paper, we extend PCGA to handle a large number of measurements (e.g., 106 or more) by constructing a fast preconditioner whose computational cost scales linearly with the data size. For illustration, we characterize the heterogeneous hydraulic conductivity (K) distribution in a laboratory-scale 3-D sand box using about 6 million transient tracer concentration measurements obtained using magnetic resonance imaging. Since each individual observation has little information on the K distribution, the data were compressed by the zeroth temporal moment of breakthrough curves, which is equivalent to the mean travel time under the experimental setting. Only about 2000 forward simulations in total were required to obtain the best estimate with corresponding estimation uncertainty, and the estimated K field captured key patterns of the original packing design, showing the efficiency and effectiveness of the proposed method. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Lee, Jonghyun AU - Yoon, Hongkyu AU - Kitanidis, Peter K AU - Werth, Charles J AU - Valocchi, Albert J Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 5213 EP - 5231 PB - American Geophysical Union, Washington, DC VL - 52 IS - 7 SN - 0043-1397, 0043-1397 KW - imagery KW - numerical models KW - three-dimensional models KW - principal components analysis KW - statistical analysis KW - data processing KW - MODFLOW KW - inverse problem KW - magnetic resonance KW - ground water KW - tracers KW - data bases KW - applications KW - hydraulic conductivity KW - breakthrough curves KW - spectroscopy KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1844922505?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Scalable+subsurface+inverse+modeling+of+huge+data+sets+with+an+application+to+tracer+concentration+breakthrough+data+from+magnetic+resonance+imaging&rft.au=Lee%2C+Jonghyun%3BYoon%2C+Hongkyu%3BKitanidis%2C+Peter+K%3BWerth%2C+Charles+J%3BValocchi%2C+Albert+J&rft.aulast=Lee&rft.aufirst=Jonghyun&rft.date=2016-07-01&rft.volume=52&rft.issue=7&rft.spage=5213&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2015WR018483 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 50 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-12-01 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - applications; breakthrough curves; data bases; data processing; ground water; hydraulic conductivity; imagery; inverse problem; magnetic resonance; MODFLOW; numerical models; principal components analysis; spectroscopy; statistical analysis; three-dimensional models; tracers DO - http://dx.doi.org/10.1002/2015WR018483 ER - TY - JOUR T1 - Using wavelet covariance models for simultaneous picking of overlapping P- and S-wave arrival times in noisy single-component data AN - 1815667626; 2016-076891 AB - We present a method for automatically identifying overlapping elastice-wave phase arrivals in single-component data. The algorithm applies to traditional near-source seismic, microseismicity and picoseismicity monitoring, and acoustic emission monitoring; we use acoustic emissions examples as a worst-case demonstration. These signals have low signal-to-noise and, because of small geometric dimensions, overlapping P- and S-wave arrivals. Our method uses the statistics of temporal covariance across many wavelet scales. We use a non-normalized rectilinity function of the scale covariance. The workflow begins by denoising signals and making a rough first-arrival estimate. We then perform a continuous Daubechies wavelet transform over tens to hundreds of scales on the signal and find a moving covariance across transform scales. The non-normalized rectilinity is calculated for each of the covariance matrices, and we sharpen changes in the rectilinity values with a maximization filter. We then estimate phase arrival times using thresholds of the filtered rectilinity. Overall, we have a high success rate for both P- and S-wave arrivals. Remaining challenges include estimation of arrival times of long duration, cigar-shape events, and culling complex high-magnitude electrical noise. By using higher-order Daubechies wavelet transforms, the scale covariance metric reflects variations in higher-moment statistics (skewness and kurtosis) and changes in short-term versus long-term means, as well as the covariance across timescales of the signal. For single-component data, it is necessary to preserve both amplitude and correlation information of the signal; this necessitates using the nonnormalized rectilinity function. JF - Seismological Research Letters AU - Rinehart, Alex J AU - McKenna, Sean A AU - Dewers, Thomas A Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 893 EP - 900 PB - Seismological Society of America, El Cerrito, CA VL - 87 IS - 4 SN - 0895-0695, 0895-0695 KW - P-waves KW - MATLAB KW - body waves KW - statistical analysis KW - data processing KW - elastic waves KW - wavelets KW - seismicity KW - seismic waves KW - algorithms KW - arrival time KW - S-waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815667626?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Using+wavelet+covariance+models+for+simultaneous+picking+of+overlapping+P-+and+S-wave+arrival+times+in+noisy+single-component+data&rft.au=Rinehart%2C+Alex+J%3BMcKenna%2C+Sean+A%3BDewers%2C+Thomas+A&rft.aulast=Rinehart&rft.aufirst=Alex&rft.date=2016-07-01&rft.volume=87&rft.issue=4&rft.spage=893&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220150130 L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 18 N1 - PubXState - CA N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - algorithms; arrival time; body waves; data processing; elastic waves; MATLAB; P-waves; S-waves; seismic waves; seismicity; statistical analysis; wavelets DO - http://dx.doi.org/10.1785/0220150130 ER - TY - JOUR T1 - Longitudinal Analysis of Microbiota in Microalga Nannochloropsis salina Cultures AN - 1808611451; PQ0003286837 AB - Large-scale open microalgae cultivation has tremendous potential to make a significant contribution to replacing petroleum-based fuels with biofuels. Open algal cultures are unavoidably inhabited with a diversity of microbes that live on, influence, and shape the fate of these ecosystems. However, there is little understanding of the resilience and stability of the microbial communities in engineered semicontinuous algal systems. To evaluate the dynamics and resilience of the microbial communities in microalgae biofuel cultures, we conducted a longitudinal study on open systems to compare the temporal profiles of the microbiota from two multigenerational algal cohorts, which include one seeded with the microbiota from an in-house culture and the other exogenously seeded with a natural-occurring consortia of bacterial species harvested from the Pacific Ocean. From these month-long, semicontinuous open microalga Nannochloropsis salina cultures, we sequenced a time-series of 46 samples, yielding 8804 operational taxonomic units derived from 9,160,076 high-quality partial 16S rRNA sequences. We provide quantitative evidence that clearly illustrates the development of microbial community is associated with microbiota ancestry. In addition, N. salina growth phases were linked with distinct changes in microbial phylotypes. Alteromonadeles dominated the community in the N. salina exponential phase whereas Alphaproteobacteria and Flavobacteriia were more prevalent in the stationary phase. We also demonstrate that the N. salina-associated microbial community in open cultures is diverse, resilient, and dynamic in response to environmental perturbations. This knowledge has general implications for developing and testing design principles of cultivated algal systems. JF - Microbial Ecology AU - Geng, Haifeng AU - Sale, Kenneth L AU - Tran-Gyamfi, Mary Bao AU - Lane, Todd W AU - Yu, Eizadora T AD - Department of Systems Biology, Sandia National Laboratories, 7011 East Ave, Livermore, CA, 94550, USA, twlane@sandia.gov Y1 - 2016/07// PY - 2016 DA - July 2016 SP - 14 EP - 24 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 72 IS - 1 SN - 0095-3628, 0095-3628 KW - Microbiology Abstracts A: Industrial & Applied Microbiology; Microbiology Abstracts C: Algology, Mycology & Protozoology; ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts; Microbiology Abstracts B: Bacteriology KW - Algal culture KW - Nannochloropsis salina KW - Fuels KW - Environmental impact KW - Salina KW - stationary phase KW - Ecology KW - Dominant species KW - Growth KW - algal culture KW - Oceans KW - I, Pacific KW - Open systems KW - rRNA 16S KW - Biofuels KW - Algae KW - J 02310:Genetics & Taxonomy KW - A 01360:Plant Diseases KW - Q1 08625:Non-edible products KW - D 04040:Ecosystem and Ecology Studies KW - K 03310:Genetics & Taxonomy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808611451?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Microbial+Ecology&rft.atitle=Longitudinal+Analysis+of+Microbiota+in+Microalga+Nannochloropsis+salina+Cultures&rft.au=Geng%2C+Haifeng%3BSale%2C+Kenneth+L%3BTran-Gyamfi%2C+Mary+Bao%3BLane%2C+Todd+W%3BYu%2C+Eizadora+T&rft.aulast=Geng&rft.aufirst=Haifeng&rft.date=2016-07-01&rft.volume=72&rft.issue=1&rft.spage=14&rft.isbn=&rft.btitle=&rft.title=Microbial+Ecology&rft.issn=00953628&rft_id=info:doi/10.1007%2Fs00248-016-0746-4 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Number of references - 55 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Ecology; Dominant species; Algal culture; Growth; Fuels; Environmental impact; Open systems; Algae; stationary phase; Oceans; algal culture; rRNA 16S; Biofuels; Nannochloropsis salina; Salina; I, Pacific DO - http://dx.doi.org/10.1007/s00248-016-0746-4 ER - TY - JOUR T1 - Self-Assembled Epitaxial Au-Oxide Vertically Aligned Nanocomposites for Nanoscale Metamaterials. AN - 1795868495; 27186652 AB - Metamaterials made of nanoscale inclusions or artificial unit cells exhibit exotic optical properties that do not exist in natural materials. Promising applications, such as super-resolution imaging, cloaking, hyperbolic propagation, and ultrafast phase velocities have been demonstrated based on mostly micrometer-scale metamaterials and few nanoscale metamaterials. To date, most metamaterials are created using costly and tedious fabrication techniques with limited paths toward reliable large-scale fabrication. In this work, we demonstrate the one-step direct growth of self-assembled epitaxial metal-oxide nanocomposites as a drastically different approach to fabricating large-area nanostructured metamaterials. Using pulsed laser deposition, we fabricated nanocomposite films with vertically aligned gold (Au) nanopillars (∼20 nm in diameter) embedded in various oxide matrices with high epitaxial quality. Strong, broad absorption features in the measured absorbance spectrum are clear signatures of plasmon resonances of Au nanopillars. By tuning their densities on selected substrates, anisotropic optical properties are demonstrated via angular dependent and polarization resolved reflectivity measurements and reproduced by full-wave simulations and effective medium theory. Our model predicts exotic properties, such as zero permittivity responses and topological transitions. Our studies suggest that these self-assembled metal-oxide nanostructures provide an exciting new material platform to control and enhance optical response at nanometer scales. JF - Nano letters AU - Li, Leigang AU - Sun, Liuyang AU - Gomez-Diaz, Juan Sebastian AU - Hogan, Nicki L AU - Lu, Ping AU - Khatkhatay, Fauzia AU - Zhang, Wenrui AU - Jian, Jie AU - Huang, Jijie AU - Su, Qing AU - Fan, Meng AU - Jacob, Clement AU - Li, Jin AU - Zhang, Xinghang AU - Jia, Quanxi AU - Sheldon, Matthew AU - Alù, Andrea AU - Li, Xiaoqin AU - Wang, Haiyan AD - Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States. ; Department of Chemistry, Texas A&M University , College Station, Texas 77843, United States. ; Sandia National Laboratories , Albuquerque, New Mexico 87185, United States. ; Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States. Y1 - 2016/06/08/ PY - 2016 DA - 2016 Jun 08 SP - 3936 EP - 3943 VL - 16 IS - 6 KW - Index Medicus KW - plasmonic property KW - Nanoscale metamaterial KW - gold nanopillar KW - vertically aligned nanocomposite (VAN) KW - self-assembled metamaterial KW - BaTiO3 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1795868495?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nano+letters&rft.atitle=Self-Assembled+Epitaxial+Au-Oxide+Vertically+Aligned+Nanocomposites+for+Nanoscale+Metamaterials.&rft.au=Li%2C+Leigang%3BSun%2C+Liuyang%3BGomez-Diaz%2C+Juan+Sebastian%3BHogan%2C+Nicki+L%3BLu%2C+Ping%3BKhatkhatay%2C+Fauzia%3BZhang%2C+Wenrui%3BJian%2C+Jie%3BHuang%2C+Jijie%3BSu%2C+Qing%3BFan%2C+Meng%3BJacob%2C+Clement%3BLi%2C+Jin%3BZhang%2C+Xinghang%3BJia%2C+Quanxi%3BSheldon%2C+Matthew%3BAl%C3%B9%2C+Andrea%3BLi%2C+Xiaoqin%3BWang%2C+Haiyan&rft.aulast=Li&rft.aufirst=Leigang&rft.date=2016-06-08&rft.volume=16&rft.issue=6&rft.spage=3936&rft.isbn=&rft.btitle=&rft.title=Nano+letters&rft.issn=1530-6992&rft_id=info:doi/10.1021%2Facs.nanolett.6b01575 LA - English DB - ProQuest Environmental Science Collection N1 - Date created - 2016-06-09 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acs.nanolett.6b01575 ER - TY - JOUR T1 - On the origin of vorticity in magnetic particle suspensions subjected to triaxial fields AN - 1808645965; PQ0003336338 AB - We have recently reported that two classes of time-dependent triaxial magnetic fields can induce vorticity in magnetic particle suspensions. The first class - symmetry-breaking fields - is comprised of two ac components and one dc component. The second class - rational triad fields - is comprised of three ac components. In both cases deterministic vorticity occurs when the ratios of the field frequencies form rational numbers. A strange aspect of these fields is that they produce fluid vorticity without generally having a circulating field vector, such as would occur in a rotating field. It has been shown, however, that the symmetry of the field trajectory, considered jointly with that of the converse field, allows vorticity to occur around one particular field axis. This axis might be any of the field components, and is determined by the relative frequencies of the field components. However, the symmetry theories give absolutely no insight into why vorticity should occur. In this paper we propose a particle-based model of vorticity in these driven fluids. This model proposes that particles form volatile chains that follow, but lag behind, the dynamic field vector. This model is consistent with the predictions of symmetry theory and gives reasonable agreement with previously reported torque density measurements for a variety of triaxial fields. JF - Soft Matter AU - Martin, James E AD - Sandia National Laboratories; Albuquerque; New Mexico; USA Y1 - 2016/06// PY - 2016 DA - June 2016 SP - 5636 EP - 5644 PB - Royal Society of Chemistry VL - 12 IS - 25 SN - 1744-683X, 1744-683X KW - Biotechnology and Bioengineering Abstracts KW - Magnetic fields KW - Volatiles KW - Models KW - W 30965:Miscellaneous, Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808645965?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Soft+Matter&rft.atitle=On+the+origin+of+vorticity+in+magnetic+particle+suspensions+subjected+to+triaxial+fields&rft.au=Martin%2C+James+E&rft.aulast=Martin&rft.aufirst=James&rft.date=2016-06-01&rft.volume=12&rft.issue=25&rft.spage=5636&rft.isbn=&rft.btitle=&rft.title=Soft+Matter&rft.issn=1744683X&rft_id=info:doi/10.1039%2Fc6sm00557h LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Number of references - 17 N1 - Last updated - 2016-08-17 N1 - SubjectsTermNotLitGenreText - Magnetic fields; Volatiles; Models DO - http://dx.doi.org/10.1039/c6sm00557h ER - TY - JOUR T1 - Glass-water interaction; effect of high valence cations on glass structure and chemical durability AN - 1800392429; 2016-056405 AB - Borosilicate glass is a durable solid, but it dissolves when in contact with aqueous fluids. The dissolution mechanism, which involves a variety of sequential reactions that occur at the solid-fluid interface, has important implications for the corrosion resistance of industrial and nuclear waste glasses. In this study, spectroscopic measurements, dissolution experiments, and Monte Carlo simulations were performed to investigate the effect of high-valence cations (HVC) on the mechanisms of glass dissolution under dilute and near-saturated conditions. Raman and NMR spectroscopy were used to determine the structural changes that occur in glass, specifically network formers (e.g., Al, Si, and B), with the addition of the HVC element hafnium in the Na (sub 2) O-Al (sub 2) O (sub 3) -B (sub 2) O (sub 3) -HfO (sub 2) -SiO (sub 2) system (e.g., Na/[Al + B] = 1.0 and HfO (sub 2) /SiO (sub 2) from 0.0 to 0.42). Spectroscopic measurements revealed that increasing hafnium content decreases N (sub 4) (tetrahedral boron/total boron) and increases the amount of Si-O-Hf moieties in the glass. Results from flow-through experiments conducted under dilute and near-saturated conditions show a decrease of approximately 100X or more in the dissolution rate over the series from 0 to 20 mol% HfO (sub 2) . Comparing the average steady-state rates obtained under dilute conditions to the rates obtained for near-saturated conditions reveals a divergence in the magnitude between the average steady state rates measured in these different conditions. The reason for this divergence was investigated more thoroughly using Monte Carlo simulations. Simulations indicate that the divergence in glass dissolution behavior under dilute and near-saturated conditions result from the stronger binding of Si sites that deposit on the surface from the influent when Hf is present in the glass. As a result, the residence time at the glass surface of these newly-formed Si sites is longer in the presence of Hf, which increases the density of anchor sites from which altered layers with higher Si densities can form. These results illustrate the importance of understanding solid-water/solid-fluid interactions by linking macroscopic reaction kinetics to nanometer scale interfacial processes. Abstract Copyright (2016) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Hopf, J AU - Kerisit, S N AU - Angeli, F AU - Charpentier, T AU - Icenhower, J P AU - McGrail, B P AU - Windisch, C F AU - Burton, S D AU - Pierce, E M Y1 - 2016/05/15/ PY - 2016 DA - 2016 May 15 SP - 54 EP - 71 PB - Elsevier, New York, NY VL - 181 SN - 0016-7037, 0016-7037 KW - silicates KW - volcanic rocks KW - oxygen KW - glasses KW - igneous rocks KW - buffers KW - mass spectra KW - fluid phase KW - crystal structure KW - silicon KW - NMR spectra KW - hafnium KW - chemical reactions KW - water-rock interaction KW - spectra KW - experimental studies KW - Monte Carlo analysis KW - statistical analysis KW - MAS NMR spectra KW - solid phase KW - ICP mass spectra KW - borosilicates KW - Raman spectra KW - metals KW - mathematical methods KW - crystal chemistry KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800392429?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Glass-water+interaction%3B+effect+of+high+valence+cations+on+glass+structure+and+chemical+durability&rft.au=Hopf%2C+J%3BKerisit%2C+S+N%3BAngeli%2C+F%3BCharpentier%2C+T%3BIcenhower%2C+J+P%3BMcGrail%2C+B+P%3BWindisch%2C+C+F%3BBurton%2C+S+D%3BPierce%2C+E+M&rft.aulast=Hopf&rft.aufirst=J&rft.date=2016-05-15&rft.volume=181&rft.issue=&rft.spage=54&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2016.02.023 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 113 N1 - PubXState - NY N1 - Document feature - illus. incl. 7 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-06-30 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - borosilicates; buffers; chemical reactions; crystal chemistry; crystal structure; experimental studies; fluid phase; glasses; hafnium; ICP mass spectra; igneous rocks; MAS NMR spectra; mass spectra; mathematical methods; metals; Monte Carlo analysis; NMR spectra; oxygen; Raman spectra; silicates; silicon; solid phase; spectra; statistical analysis; volcanic rocks; water-rock interaction DO - http://dx.doi.org/10.1016/j.gca.2016.02.023 ER - TY - JOUR T1 - Propagation of uncertainty and sensitivity analysis in an integral oil-gas plume model AN - 1819896275; 2016-081255 AB - Polynomial Chaos expansions are used to analyze uncertainties in an integral oil-gas plume model simulating the Deepwater Horizon oil spill. The study focuses on six uncertain input parameters-two entrainment parameters, the gas to oil ratio, two parameters associated with the droplet-size distribution, and the flow rate-that impact the model's estimates of the plume's trap and peel heights, and of its various gas fluxes. The ranges of the uncertain inputs were determined by experimental data. Ensemble calculations were performed to construct polynomial chaos-based surrogates that describe the variations in the outputs due to variations in the uncertain inputs. The surrogates were then used to estimate reliably the statistics of the model outputs, and to perform an analysis of variance. Two experiments were performed to study the impacts of high and low flow rate uncertainties. The analysis shows that in the former case the flow rate is the largest contributor to output uncertainties, whereas in the latter case, with the uncertainty range constrained by aposteriori analyses, the flow rate's contribution becomes negligible. The trap and peel heights uncertainties are then mainly due to uncertainties in the 95% percentile of the droplet size and in the entrainment parameters. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Oceans AU - Wang, Shitao AU - Iskandarani, Mohamed AU - Srinivasan, Ashwanth AU - Thacker, W Carlisle AU - Winokur, Justin AU - Knio, Omar M Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 3488 EP - 3501 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 5 SN - 2169-9275, 2169-9275 KW - contaminant plumes KW - natural gas KW - marine pollution KW - petroleum KW - Deepwater Horizon oil spill KW - Gulf of Mexico KW - droplets KW - buoyancy KW - sensitivity analysis KW - oil spills KW - digital simulation KW - crude oil KW - probability KW - uncertainty KW - numerical models KW - statistical analysis KW - bubbles KW - pollution KW - gases KW - models KW - organic compounds KW - hydrocarbons KW - North Atlantic KW - Atlantic Ocean KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819896275?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Propagation+of+uncertainty+and+sensitivity+analysis+in+an+integral+oil-gas+plume+model&rft.au=Wang%2C+Shitao%3BIskandarani%2C+Mohamed%3BSrinivasan%2C+Ashwanth%3BThacker%2C+W+Carlisle%3BWinokur%2C+Justin%3BKnio%2C+Omar+M&rft.aulast=Wang&rft.aufirst=Shitao&rft.date=2016-05-01&rft.volume=121&rft.issue=5&rft.spage=3488&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2015JC011365 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 56 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - Atlantic Ocean; bubbles; buoyancy; contaminant plumes; crude oil; Deepwater Horizon oil spill; digital simulation; droplets; gases; Gulf of Mexico; hydrocarbons; marine pollution; models; natural gas; North Atlantic; numerical models; oil spills; organic compounds; petroleum; pollution; probability; sensitivity analysis; statistical analysis; uncertainty DO - http://dx.doi.org/10.1002/2015JC011365 ER - TY - JOUR T1 - Modeling of heat extraction from variably fractured porous media in enhanced geothermal systems AN - 1819894583; 2016-080246 AB - Modeling of heat extraction in Enhanced Geothermal Systems is presented. The study builds on recent studies on the use of directional wells to improve heat transfer between doublet injection and production wells. The current study focuses on the influence of fracture orientation on production temperature in deep low permeability geothermal systems, and the effects of directional drilling and separation distance between boreholes on heat extraction. The modeling results indicate that fracture orientation with respect to the well-pair plane has significant influence on reservoir thermal drawdown. The vertical well doublet is impacted significantly more than the horizontal well doublet. Abstract Copyright (2016) Elsevier, B.V. JF - Geothermics AU - Hadgu, Teklu AU - Kalinina, Elena AU - Lowry, Thomas S Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 75 EP - 85 PB - Elsevier, Oxford-New York VL - 61 SN - 0375-6505, 0375-6505 KW - horizontal drilling KW - geothermal wells KW - mathematical models KW - geothermal engineering KW - enhanced recovery KW - simulation KW - production KW - geothermal energy KW - drawdown KW - stochastic processes KW - naturally fractured reservoirs KW - heat transfer KW - reservoir properties KW - directional drilling KW - drilling KW - permeability KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819894583?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geothermics&rft.atitle=Modeling+of+heat+extraction+from+variably+fractured+porous+media+in+enhanced+geothermal+systems&rft.au=Hadgu%2C+Teklu%3BKalinina%2C+Elena%3BLowry%2C+Thomas+S&rft.aulast=Hadgu&rft.aufirst=Teklu&rft.date=2016-05-01&rft.volume=61&rft.issue=&rft.spage=75&rft.isbn=&rft.btitle=&rft.title=Geothermics&rft.issn=03756505&rft_id=info:doi/10.1016%2Fj.geothermics.2016.01.009 L2 - http://www.sciencedirect.com/science/journal/03756505 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 20 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-16 N1 - CODEN - GTMCAT N1 - SubjectsTermNotLitGenreText - directional drilling; drawdown; drilling; enhanced recovery; geothermal energy; geothermal engineering; geothermal wells; heat transfer; horizontal drilling; mathematical models; naturally fractured reservoirs; permeability; production; reservoir properties; simulation; stochastic processes DO - http://dx.doi.org/10.1016/j.geothermics.2016.01.009 ER - TY - JOUR T1 - The direct-current response of electrically conducting fractures excited by a grounded current source AN - 1803780465; 2016-060624 AB - Hydraulic fracture stimulation of low permeability reservoir rocks is an established and cross-cutting technology for enhancing hydrocarbon production in sedimentary formations and increasing heat exchange in crystalline geothermal systems. Whereas the primary measure of success is the ability to keep the newly generated fractures sufficiently open, long-term reservoir management requires a knowledge of the spatial extent, morphology, and distribution of the fractures - knowledge primarily informed by microseismic and ground deformation monitoring. To minimize the uncertainty associated with interpreting such data, we investigate through numerical simulation the usefulness of direct-current (DC) resistivity data for characterizing subsurface fractures with elevated electrical conductivity by considering a geophysical experiment consisting of a grounded current source deployed in a steel cased borehole. In doing so, the casing efficiently energizes the fractures with steady current. Finite element simulations of this experiment for a horizontal well intersecting a small set of vertical fractures indicate that the fractures manifest electrically in (at least) two ways: (1) a local perturbation in electric potential proximal to the fracture set, with limited farfield expression and (2) an overall reduction in the electric potential along the borehole casing due to enhanced current flow through the fractures into the surrounding formation. The change in casing potential results in a measurable effect that can be observed far from fractures themselves. Under these conditions, our results suggest that farfield, timelapse measurements of DC potentials can be interpreted by simple, linear inversion for a Coulomb charge distribution along the borehole path, including a local charge perturbation due to the fractures. This approach offers an inexpensive method for detecting and monitoring the time-evolution of electrically conducting fractures while ultimately providing an estimate of their effective conductivity - the latter providing an important measure independent of seismic methods on fracture shape, size, and hydraulic connectivity. JF - Geophysics AU - Weiss, Chester J AU - Aldridge, David F AU - Knox, Hunter A AU - Schramm, Kimberly A AU - Bartel, Lewis C Y1 - 2016/05// PY - 2016 DA - May 2016 SP - E201 EP - E210 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 81 IS - 3 SN - 0016-8033, 0016-8033 KW - hydraulic fracturing KW - electrical conductivity KW - numerical models KW - four-dimensional models KW - numerical analysis KW - geophysical methods KW - electrical methods KW - connectivity KW - equations KW - resistivity KW - ground water KW - geothermal energy KW - fractures KW - finite element analysis KW - geothermal systems KW - geothermal exploration KW - boreholes KW - direct-current methods KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803780465?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysics&rft.atitle=The+direct-current+response+of+electrically+conducting+fractures+excited+by+a+grounded+current+source&rft.au=Weiss%2C+Chester+J%3BAldridge%2C+David+F%3BKnox%2C+Hunter+A%3BSchramm%2C+Kimberly+A%3BBartel%2C+Lewis+C&rft.aulast=Weiss&rft.aufirst=Chester&rft.date=2016-05-01&rft.volume=81&rft.issue=3&rft.spage=E201&rft.isbn=&rft.btitle=&rft.title=Geophysics&rft.issn=00168033&rft_id=info:doi/10.1190%2Fgeo2015-0262.1 L2 - http://library.seg.org/journal/gpysa7 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 39 N1 - PubXState - OK N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-07-14 N1 - CODEN - GPYSA7 N1 - SubjectsTermNotLitGenreText - boreholes; connectivity; direct-current methods; electrical conductivity; electrical methods; equations; finite element analysis; four-dimensional models; fractures; geophysical methods; geothermal energy; geothermal exploration; geothermal systems; ground water; hydraulic fracturing; numerical analysis; numerical models; resistivity DO - http://dx.doi.org/10.1190/geo2015-0262.1 ER - TY - JOUR T1 - Cobalt phosphide-based nanoparticles as bifunctional electrocatalysts for alkaline water splitting AN - 1798737540; PQ0003146524 AB - Cobalt phosphide-based nanoparticles serve as effective bifunctional electrocatalysts for alkaline water splitting reactions with activities comparable to more expensive precious metal catalysts. JF - Journal of materials chemistry. A, Materials for energy and sustainability AU - Vigil, Julian A AU - Lambert, Timothy N AU - Christensen, Benjamin T AD - Department of Materials; Devices & Energy Technologies; Sandia National Laboratories; Albuquerque; 87185; New Mexico; USA; +1 505 844 7786; +1 505 284 6967 Y1 - 2016/05// PY - 2016 DA - May 2016 SP - 7549 EP - 7554 PB - Royal Society of Chemistry VL - 4 IS - 20 SN - 2050-7488, 2050-7488 KW - Sustainability Science Abstracts KW - Metals KW - Cobalt KW - Energy KW - Catalysts KW - Sustainability KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1798737540?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.atitle=Cobalt+phosphide-based+nanoparticles+as+bifunctional+electrocatalysts+for+alkaline+water+splitting&rft.au=Vigil%2C+Julian+A%3BLambert%2C+Timothy+N%3BChristensen%2C+Benjamin+T&rft.aulast=Vigil&rft.aufirst=Julian&rft.date=2016-05-01&rft.volume=4&rft.issue=20&rft.spage=7549&rft.isbn=&rft.btitle=&rft.title=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.issn=20507488&rft_id=info:doi/10.1039%2Fc6ta00637j LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-06-01 N1 - Number of references - 46 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Metals; Energy; Cobalt; Catalysts; Sustainability DO - http://dx.doi.org/10.1039/c6ta00637j ER - TY - JOUR T1 - Protocells: Modular Mesoporous Silica Nanoparticle-Supported Lipid Bilayers for Drug Delivery. AN - 1783914489; 26780591 AB - Mesoporous silica nanoparticle-supported lipid bilayers, termed 'protocells,' represent a potentially transformative class of therapeutic and theranostic delivery vehicle. The field of targeted drug delivery poses considerable challenges that cannot be addressed with a single 'magic bullet'. Consequently, the protocell has been designed as a modular platform composed of interchangeable biocompatible components. The mesoporous silica core has variable size and shape to direct biodistribution and a controlled pore size and surface chemistry to accommodate diverse cargo. The encapsulating supported lipid bilayer can be modified with targeting and trafficking ligands as well as polyethylene glycol (PEG) to effect selective binding, endosomal escape of cargo, drug efflux prevention, and potent therapeutic delivery, while maintaining in vivo colloidal stability. This review describes the individual components of the platform, including the mesoporous silica nanoparticle core and supported lipid bilayer, their assembly (by multiple techniques) into a protocell, and the combined, often synergistic, performance of the protocell based on in vitro and in vivo studies, including the assessment of biocompatibility and toxicity. In closing, the many emerging variations of the protocell theme and the future directions for protocell research are commented on. JF - Small (Weinheim an der Bergstrasse, Germany) AU - Butler, Kimberly S AU - Durfee, Paul N AU - Theron, Christophe AU - Ashley, Carlee E AU - Carnes, Eric C AU - Brinker, C Jeffrey AD - Center for Micro-Engineered Materials, The University of New Mexico, Albuquerque, NM, 87131, USA. ; Department of Chemical and Biological Engineering, The University of New Mexico, Albuquerque, NM, 87131, USA. ; Bioenergy and Defense Technology Department, Sandia National Laboratories, Livermore, CA, 94551, USA. ; Nanobiology Department, Sandia National Laboratories, Livermore, California, 94551, USA. Y1 - 2016/04/27/ PY - 2016 DA - 2016 Apr 27 SP - 2173 EP - 2185 VL - 12 IS - 16 KW - Biocompatible Materials KW - 0 KW - Colloids KW - Ligands KW - Lipid Bilayers KW - Liposomes KW - Peptides KW - RNA, Small Interfering KW - Polyethylene Glycols KW - 30IQX730WE KW - Silicon Dioxide KW - 7631-86-9 KW - Index Medicus KW - mesoporous silica KW - supported lipid bilayers KW - protocells KW - drug delivery KW - targeted delivery KW - nanoparticles KW - RNA, Small Interfering -- chemistry KW - Animals KW - Neoplasms -- drug therapy KW - Colloids -- chemistry KW - Humans KW - Tumor Microenvironment KW - Porosity KW - Tissue Distribution KW - Biocompatible Materials -- chemistry KW - Nanostructures -- chemistry KW - Polyethylene Glycols -- chemistry KW - Peptides -- chemistry KW - Liposomes -- chemistry KW - Cell Line KW - Drug Delivery Systems KW - Nanomedicine -- methods KW - Lipid Bilayers -- chemistry KW - Silicon Dioxide -- chemistry KW - Nanoparticles -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1783914489?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Small+%28Weinheim+an+der+Bergstrasse%2C+Germany%29&rft.atitle=Protocells%3A+Modular+Mesoporous+Silica+Nanoparticle-Supported+Lipid+Bilayers+for+Drug+Delivery.&rft.au=Butler%2C+Kimberly+S%3BDurfee%2C+Paul+N%3BTheron%2C+Christophe%3BAshley%2C+Carlee+E%3BCarnes%2C+Eric+C%3BBrinker%2C+C+Jeffrey&rft.aulast=Butler&rft.aufirst=Kimberly&rft.date=2016-04-27&rft.volume=12&rft.issue=16&rft.spage=2173&rft.isbn=&rft.btitle=&rft.title=Small+%28Weinheim+an+der+Bergstrasse%2C+Germany%29&rft.issn=1613-6829&rft_id=info:doi/10.1002%2Fsmll.201502119 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2017-01-03 N1 - Date created - 2016-04-22 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1002/smll.201502119 ER - TY - JOUR T1 - An overview of uncertainty quantification techniques with application to oceanic and oil-spill simulations AN - 1819896983; 2016-078871 AB - We give an overview of four different ensemble-based techniques for uncertainty quantification and illustrate their application in the context of oil plume simulations. These techniques share the common paradigm of constructing a model proxy that efficiently captures the functional dependence of the model output on uncertain model inputs. This proxy is then used to explore the space of uncertain inputs using a large number of samples, so that reliable estimates of the model's output statistics can be calculated. Three of these techniques use polynomial chaos (PC) expansions to construct the model proxy, but they differ in their approach to determining the expansions' coefficients; the fourth technique uses Gaussian Process Regression (GPR). An integral plume model for simulating the Deepwater Horizon oil-gas blowout provides examples for illustrating the different techniques. A Monte Carlo ensemble of 50,000 model simulations is used for gauging the performance of the different proxies. The examples illustrate how regression-based techniques can outperform projection-based techniques when the model output is noisy. They also demonstrate that robust uncertainty analysis can be performed at a fraction of the cost of the Monte Carlo calculation. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Oceans AU - Iskandarani, Mohamed AU - Wang, Shitao AU - Srinivasan, Ashwanth AU - Carlisle Thacker, W AU - Winokur, Justin AU - Knio, Omar M Y1 - 2016/04// PY - 2016 DA - April 2016 SP - 2789 EP - 2808 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 4 SN - 2169-9275, 2169-9275 KW - plumes KW - numerical models KW - marine pollution KW - statistical analysis KW - data processing KW - pollution KW - marine transport KW - Deepwater Horizon oil spill KW - Gulf of Mexico KW - errors KW - transport KW - oil spills KW - mathematical methods KW - digital simulation KW - North Atlantic KW - uncertainty KW - Atlantic Ocean KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819896983?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=An+overview+of+uncertainty+quantification+techniques+with+application+to+oceanic+and+oil-spill+simulations&rft.au=Iskandarani%2C+Mohamed%3BWang%2C+Shitao%3BSrinivasan%2C+Ashwanth%3BCarlisle+Thacker%2C+W%3BWinokur%2C+Justin%3BKnio%2C+Omar+M&rft.aulast=Iskandarani&rft.aufirst=Mohamed&rft.date=2016-04-01&rft.volume=121&rft.issue=4&rft.spage=2789&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Oceans&rft.issn=21699275&rft_id=info:doi/10.1002%2F2015JC011366 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 52 N1 - PubXState - DC N1 - Document feature - illus. incl. 5 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - Atlantic Ocean; data processing; Deepwater Horizon oil spill; digital simulation; errors; Gulf of Mexico; marine pollution; marine transport; mathematical methods; North Atlantic; numerical models; oil spills; plumes; pollution; statistical analysis; transport; uncertainty DO - http://dx.doi.org/10.1002/2015JC011366 ER - TY - JOUR T1 - GeoTess; a generalized Earth model software utility AN - 1780804749; 2016-034668 AB - GeoTess is a model parameterization and software support library that manages the construction, population, storage, and interrogation of data stored in 2D and 3D Earth models. The software is available in Java and C++, with a C interface to the C++ library. The software has been tested on Linux, Mac, Sun, and PC platforms. It is open source and is available online (see Data and Resources). JF - Seismological Research Letters AU - Ballard, Sanford AU - Hipp, James AU - Kraus, Brian AU - Encarnacao, Andre AU - Young, Christopher Y1 - 2016/03/23/ PY - 2016 DA - 2016 Mar 23 SP - 719 EP - 725 PB - Seismological Society of America, El Cerrito, CA VL - 87 IS - 3 SN - 0895-0695, 0895-0695 KW - tomography KW - technology KW - monitoring KW - three-dimensional models KW - global KW - data processing KW - information management KW - geometry KW - models KW - computer programs KW - seismicity KW - tessellation KW - GeoTess KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780804749?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=GeoTess%3B+a+generalized+Earth+model+software+utility&rft.au=Ballard%2C+Sanford%3BHipp%2C+James%3BKraus%2C+Brian%3BEncarnacao%2C+Andre%3BYoung%2C+Christopher&rft.aulast=Ballard&rft.aufirst=Sanford&rft.date=2016-03-23&rft.volume=87&rft.issue=3&rft.spage=719&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2F0220150222 L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 10 N1 - PubXState - CA N1 - Document feature - illus. N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - computer programs; data processing; geometry; GeoTess; global; information management; models; monitoring; seismicity; technology; tessellation; three-dimensional models; tomography DO - http://dx.doi.org/10.1785/0220150222 ER - TY - JOUR T1 - Structural Basis of Stereospecificity in the Bacterial Enzymatic Cleavage of β-Aryl Ether Bonds in Lignin. AN - 1770878408; 26637355 AB - Lignin is a combinatorial polymer comprising monoaromatic units that are linked via covalent bonds. Although lignin is a potential source of valuable aromatic chemicals, its recalcitrance to chemical or biological digestion presents major obstacles to both the production of second-generation biofuels and the generation of valuable coproducts from lignin's monoaromatic units. Degradation of lignin has been relatively well characterized in fungi, but it is less well understood in bacteria. A catabolic pathway for the enzymatic breakdown of aromatic oligomers linked via β-aryl ether bonds typically found in lignin has been reported in the bacterium Sphingobium sp. SYK-6. Here, we present x-ray crystal structures and biochemical characterization of the glutathione-dependent β-etherases, LigE and LigF, from this pathway. The crystal structures show that both enzymes belong to the canonical two-domain fold and glutathione binding site architecture of the glutathione S-transferase family. Mutagenesis of the conserved active site serine in both LigE and LigF shows that, whereas the enzymatic activity is reduced, this amino acid side chain is not absolutely essential for catalysis. The results include descriptions of cofactor binding sites, substrate binding sites, and catalytic mechanisms. Because β-aryl ether bonds account for 50-70% of all interunit linkages in lignin, understanding the mechanism of enzymatic β-aryl ether cleavage has significant potential for informing ongoing studies on the valorization of lignin. JF - The Journal of biological chemistry AU - Helmich, Kate E AU - Pereira, Jose Henrique AU - Gall, Daniel L AU - Heins, Richard A AU - McAndrew, Ryan P AU - Bingman, Craig AU - Deng, Kai AU - Holland, Keefe C AU - Noguera, Daniel R AU - Simmons, Blake A AU - Sale, Kenneth L AU - Ralph, John AU - Donohue, Timothy J AU - Adams, Paul D AU - Phillips, George N AD - From the Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706, the United States Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726. ; the Joint BioEnergy Institute, Emeryville, California 94608, the Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720. ; the United States Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726, the Departments of Civil and Environmental Engineering and. ; the Joint BioEnergy Institute, Emeryville, California 94608, the Biological and Engineering Sciences Center, Sandia National Laboratories, Livermore, California 94551. ; From the Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706. ; the United States Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53726, Bacteriology, University of Wisconsin, Madison, Wisconsin 53706, tdonohue@bact.wisc.edu. ; the Joint BioEnergy Institute, Emeryville, California 94608, the Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, the Department of Bioengineering, University of California, Berkeley, California 94720, and pdadams@lbl.gov. ; the Department of Biochemistry and Cell Biology, Rice University, Houston, Texas 77251 georgep@rice.edu. Y1 - 2016/03/04/ PY - 2016 DA - 2016 Mar 04 SP - 5234 EP - 5246 VL - 291 IS - 10 KW - Bacterial Proteins KW - 0 KW - Lignin KW - 9005-53-2 KW - Oxidoreductases KW - EC 1.- KW - aryl ether cleaving enzyme KW - Index Medicus KW - enzyme catalysis KW - X-ray crystallography KW - stereoselectivity KW - enzyme mechanism KW - lignin degradation KW - protein structure KW - plant cell wall KW - enzyme structure KW - structural enzymology KW - Conserved Sequence KW - Molecular Sequence Data KW - Amino Acid Sequence KW - Substrate Specificity KW - Proteobacteria -- enzymology KW - Protein Binding KW - Bacterial Proteins -- genetics KW - Oxidoreductases -- genetics KW - Oxidoreductases -- metabolism KW - Bacterial Proteins -- chemistry KW - Bacterial Proteins -- metabolism KW - Oxidoreductases -- chemistry KW - Catalytic Domain KW - Lignin -- metabolism UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1770878408?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Journal+of+biological+chemistry&rft.atitle=Structural+Basis+of+Stereospecificity+in+the+Bacterial+Enzymatic+Cleavage+of+%CE%B2-Aryl+Ether+Bonds+in+Lignin.&rft.au=Helmich%2C+Kate+E%3BPereira%2C+Jose+Henrique%3BGall%2C+Daniel+L%3BHeins%2C+Richard+A%3BMcAndrew%2C+Ryan+P%3BBingman%2C+Craig%3BDeng%2C+Kai%3BHolland%2C+Keefe+C%3BNoguera%2C+Daniel+R%3BSimmons%2C+Blake+A%3BSale%2C+Kenneth+L%3BRalph%2C+John%3BDonohue%2C+Timothy+J%3BAdams%2C+Paul+D%3BPhillips%2C+George+N&rft.aulast=Helmich&rft.aufirst=Kate&rft.date=2016-03-04&rft.volume=291&rft.issue=10&rft.spage=5234&rft.isbn=&rft.btitle=&rft.title=The+Journal+of+biological+chemistry&rft.issn=1083-351X&rft_id=info:doi/10.1074%2Fjbc.M115.694307 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-08-09 N1 - Date created - 2016-03-05 N1 - Date revised - 2017-02-17 N1 - Genetic sequence - 1GSQ; PDB; 1LJR; 4XT0; 2GSR; 3LFL; 2PMT; 2GST; 1GUH; 4G10; 4YAN; 4YAM N1 - SuppNotes - Cited By: Structure. 1998 Mar 15;6(3):309-22 [9551553] J Comput Chem. 2011 Jul 30;32(10):2149-59 [21541955] J Mol Biol. 1998 Aug 7;281(1):135-47 [9680481] Acta Crystallogr D Biol Crystallogr. 2004 Dec;60(Pt 12 Pt 1):2126-32 [15572765] Protein Expr Purif. 2005 Apr;40(2):256-67 [15766867] Annu Rev Pharmacol Toxicol. 2005;45:51-88 [15822171] Int Microbiol. 2005 Sep;8(3):195-204 [16200498] Biosci Biotechnol Biochem. 2007 Jan;71(1):1-15 [17213657] Biochem J. 2007 Apr 15;403(2):267-74 [17223798] Nucleic Acids Res. 2007 Jul;35(Web Server issue):W375-83 [17452350] Biochem J. 2007 Aug 15;406(1):115-23 [17484723] J Mol Biol. 2007 Sep 21;372(3):774-97 [17681537] Acta Crystallogr D Biol Crystallogr. 2008 Jan;64(Pt 1):61-9 [18094468] Proteins. 2008 May 1;71(2):982-94 [18004753] FEBS J. 2009 Jan;276(1):58-75 [19016852] Genome Biol. 2008;9(12):242 [19133109] Acta Crystallogr D Biol Crystallogr. 2009 Jun;65(Pt 6):582-601 [19465773] Appl Environ Microbiol. 2009 Aug;75(16):5195-201 [19542348] PLoS One. 2009;4(12):e8119 [19956581] Acta Crystallogr D Biol Crystallogr. 2010 Feb;66(Pt 2):213-21 [20124702] Nat Protoc. 2010 Apr;5(4):725-38 [20360767] J Biol Chem. 2011 Feb 11;286(6):4271-9 [21106529] Drug Metab Rev. 2011 May;43(2):138-51 [21428697] Curr Opin Biotechnol. 2011 Jun;22(3):394-400 [21071202] Nucleic Acids Res. 2011 Jul;39(Web Server issue):W270-7 [21624888] Nat Prod Rep. 2011 Nov;28(12):1883-96 [21918777] FEBS Lett. 2012 Nov 16;586(22):3944-50 [23058289] J Biol Chem. 2012 Nov 9;287(46):39001-11 [23007392] PLoS One. 2013;8(10):e77985 [24205054] J Agric Food Chem. 1999 Aug;47(8):2991-6 [10552598] Proteins. 2001 Jan 1;42(1):38-48 [11093259] J Basic Microbiol. 2001;41(3-4):185-227 [11512451] Biochem J. 2001 Nov 15;360(Pt 1):1-16 [11695986] J Bacteriol. 2003 Mar;185(6):1768-75 [12618439] J Comput Chem. 2004 Oct;25(13):1605-12 [15264254] Science. 1991 Oct 4;254(5028):51-8 [1925561] J Mol Biol. 1993 Jul 5;232(1):192-212 [8331657] Biochemistry. 1994 Feb 8;33(5):1043-52 [8110735] Eur J Biochem. 1994 Mar 15;220(3):645-61 [8143720] J Mol Biol. 1994 Oct 14;243(1):72-92 [7932743] Biochemistry. 1995 Apr 25;34(16):5317-28 [7727393] Chem Res Toxicol. 1997 Jan;10(1):2-18 [9074797] FEBS Lett. 1998 Feb 20;423(2):122-4 [9512342] PLoS One. 2013;8(11):e80298 [24278272] J Biol Chem. 2014 Mar 21;289(12):8656-67 [24509858] Science. 2014 May 16;344(6185):1246843 [24833396] Structure. 1998 Jun 15;6(6):721-34 [9655824] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1074/jbc.M115.694307 ER - TY - JOUR T1 - Data assimilation of surface displacements to improve geomechanical parameters of gas storage reservoirs AN - 1840618270; 2016-093833 AB - Although the beginning of reservoir geomechanics dates back to the late 1960s, only recently stochastical geomechanical modelling has been introduced into the general framework of reservoir operational planning. In this study, the ensemble smoother (ES) algorithm, i.e., an ensemble-based data assimilation method, is employed to reduce the uncertainty of the constitutive parameters characterizing the geomechanical model of an underground gas storage (UGS) field situated in the upper Adriatic sedimentary basin (Italy), the Lombardia UGS. The model is based on a nonlinear transversely isotropic stress-strain constitutive law and is solved by 3-D finite elements. The Lombardia UGS experiences seasonal pore pressure change caused by fluid extraction/injection leading to land settlement/upheaval. The available observations consist of vertical and horizontal time-lapse displacements accurately measured by persistent scatterer interferometry (PSI) on RADARSAT scenes acquired between 2003 and 2008. The positive outcome of preliminary tests on simplified cases has supported the use of the ES to jointly assimilate vertical and horizontal displacements. The ES approach is shown to effectively reduce the spread of the uncertain parameters, i.e., the Poisson's ratio, the ratio between the horizontal and vertical Young and shear moduli, and the ratio between the virgin loading (I cycle) and unloading/reloading (II cycle) compressibility. The outcomes of the numerical simulations point out that the updated parameters depend on the assimilated measurement locations as well as the error associated to the PSI measurements. The parameter estimation may be improved by taking into account possible model and/or observation biases along with the use of an assimilation approach, e.g., the Iterative ensemble smoother, more appropriate for nonlinear problems. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Zoccarato, Claudia AU - Bau, D AU - Ferronato, M AU - Gambolati, G AU - Alzraiee, A AU - Teatini, P Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 1441 EP - 1461 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 3 SN - 2169-9313, 2169-9313 KW - petroleum exploration KW - petroleum engineering KW - Adriatic Sea KW - three-dimensional models KW - natural gas KW - radar methods KW - petroleum KW - Europe KW - elastic constants KW - basin analysis KW - satellite methods KW - oil and gas fields KW - Italy KW - Southern Europe KW - East Mediterranean KW - Adriatic region KW - reservoir properties KW - Mediterranean Sea KW - RADARSAT KW - Young's modulus KW - remote sensing KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840618270?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Data+assimilation+of+surface+displacements+to+improve+geomechanical+parameters+of+gas+storage+reservoirs&rft.au=Zoccarato%2C+Claudia%3BBau%2C+D%3BFerronato%2C+M%3BGambolati%2C+G%3BAlzraiee%2C+A%3BTeatini%2C+P&rft.aulast=Zoccarato&rft.aufirst=Claudia&rft.date=2016-03-01&rft.volume=121&rft.issue=3&rft.spage=1441&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2015JB012090 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 40 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - Adriatic region; Adriatic Sea; basin analysis; East Mediterranean; elastic constants; Europe; Italy; Mediterranean Sea; natural gas; oil and gas fields; petroleum; petroleum engineering; petroleum exploration; radar methods; RADARSAT; remote sensing; reservoir properties; satellite methods; Southern Europe; three-dimensional models; Young's modulus DO - http://dx.doi.org/10.1002/2015JB012090 ER - TY - JOUR T1 - Submarine groundwater discharge as a possible formation mechanism for permafrost-associated gas hydrate on the circum-Arctic continental shelf AN - 1840615737; 2016-093830 AB - Submarine groundwater discharge (SGD) is a large-scale, buoyancy-driven, offshore flow of terrestrial groundwater. If SGD occurs within the permafrost-bearing sediments of the circum-Arctic shelf, such fluid circulation may transport large amounts of dissolved methane to the circum-Arctic shelf, aiding the formation of permafrost-associated gas hydrate. We investigate the feasibility of this new permafrost-associated gas hydrate formation mechanism with a 2-D, multiphase fluid flow model, using the Canadian Beaufort Shelf as an example. The numerical model includes freeze/thaw permafrost processes and predicts the unsteady, 2-D methane solubility field for hydrate inventory calculations. Model results show that widespread, low-saturation hydrate deposits accumulate within and below submarine permafrost, even if offshore-flowing groundwater is undersaturated in methane gas. While intrapermafrost hydrate inventory varies widely depending on permafrost extent, subpermafrost hydrate stability remains largely intact across consecutive glacial cycles, allowing widespread subpermafrost accumulation over time. Methane gas escape to the sediment surface (atmosphere) is predicted along the seaward permafrost boundary during the early to middle years of each glacial epoch; however, if free gas is trapped within the forming permafrost layer instead, venting may be delayed until ocean transgression deepens the permafrost table during interglacial periods, and may be related to the spatial distribution of observed pingo-like features (PLFs) on the Canadian Beaufort Shelf. Shallow, gas-charged sediments are predicted above the gas hydrate stability zone at the midshelf to shelf edge and the upper slope, where a gap in hydrate stability allows free gas to accumulate and numerous PLFs have been observed. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Frederick, Jennifer M AU - Buffett, Bruce A Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 1383 EP - 1404 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 121 IS - 3 SN - 2169-9313, 2169-9313 KW - permafrost KW - last glacial maximum KW - geophysical surveys KW - gas hydrates KW - aliphatic hydrocarbons KW - global change KW - climate change KW - ground water KW - buoyancy KW - Cenozoic KW - marine sediments KW - glacial environment KW - sediments KW - Arctic Ocean KW - ocean floors KW - discharge KW - global warming KW - seismic profiles KW - methane KW - Quaternary KW - numerical models KW - interglacial environment KW - Arctic region KW - geophysical methods KW - fluid flow KW - alkanes KW - solubility KW - seismic methods KW - models KW - organic compounds KW - hydrocarbons KW - surveys KW - Pleistocene KW - geophysical profiles KW - continental shelf KW - 24:Quaternary geology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840615737?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Submarine+groundwater+discharge+as+a+possible+formation+mechanism+for+permafrost-associated+gas+hydrate+on+the+circum-Arctic+continental+shelf&rft.au=Frederick%2C+Jennifer+M%3BBuffett%2C+Bruce+A&rft.aulast=Frederick&rft.aufirst=Jennifer&rft.date=2016-03-01&rft.volume=121&rft.issue=3&rft.spage=1383&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2015JB012627 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; Arctic Ocean; Arctic region; buoyancy; Cenozoic; climate change; continental shelf; discharge; fluid flow; gas hydrates; geophysical methods; geophysical profiles; geophysical surveys; glacial environment; global change; global warming; ground water; hydrocarbons; interglacial environment; last glacial maximum; marine sediments; methane; models; numerical models; ocean floors; organic compounds; permafrost; Pleistocene; Quaternary; sediments; seismic methods; seismic profiles; solubility; surveys DO - http://dx.doi.org/10.1002/2015JB012627 ER - TY - JOUR T1 - River stage influences on uranium transport in a hydrologically dynamic groundwater-surface water transition zone AN - 1815668079; 2016-076033 AB - A well-field within a uranium (U) plume in the groundwater-surface water transition zone was monitored for a 3 year period for water table elevation and dissolved solutes. The plume discharges to the Columbia River, which displays a dramatic spring stage surge resulting from snowmelt. Groundwater exhibits a low hydrologic gradient and chemical differences with river water. River water intrudes the site in spring. Specific aims were to assess the impacts of river intrusion on dissolved uranium (U (sub aq) ), specific conductance (SpC), and other solutes, and to discriminate between transport, geochemical, and source term heterogeneity effects. Time series trends for U (sub aq) and SpC were complex and displayed large temporal and well-to-well variability as a result of water table elevation fluctuations, river water intrusion, and changes in groundwater flow directions. The wells were clustered into subsets exhibiting common behaviors resulting from the intrusion dynamics of river water and the location of source terms. Hot-spots in U (sub aq) varied in location with increasing water table elevation through the combined effects of advection and source term location. Heuristic reactive transport modeling with PFLOTRAN demonstrated that mobilized U (sub aq) was transported between wells and source terms in complex trajectories, and was diluted as river water entered and exited the groundwater system. While U (sub aq) time-series concentration trends varied significantly from year-to-year as a result of climate-caused differences in the spring hydrograph, common and partly predictable response patterns were observed that were driven by water table elevation, and the extent and duration of river water intrusion. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Zachara, John M AU - Chen, Xingyuan AU - Murray, Chris AU - Hammond, Glenn E Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 1568 EP - 1590 PB - American Geophysical Union, Washington, DC VL - 52 IS - 3 SN - 0043-1397, 0043-1397 KW - United States KW - contaminant plumes KW - isotopes KW - data processing KW - ground water KW - radioactive isotopes KW - transport KW - hydrographs KW - reactive transport KW - water pollution KW - Washington KW - numerical models KW - Columbia River KW - surface water KW - solutes KW - pollution KW - Hanford Site KW - migration of elements KW - computer programs KW - water table KW - fluctuations KW - metals KW - uranium KW - seasonal variations KW - actinides KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815668079?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=River+stage+influences+on+uranium+transport+in+a+hydrologically+dynamic+groundwater-surface+water+transition+zone&rft.au=Zachara%2C+John+M%3BChen%2C+Xingyuan%3BMurray%2C+Chris%3BHammond%2C+Glenn+E&rft.aulast=Zachara&rft.aufirst=John&rft.date=2016-03-01&rft.volume=52&rft.issue=3&rft.spage=1568&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2015WR018009 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 64 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2016-09-01 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - actinides; Columbia River; computer programs; contaminant plumes; data processing; fluctuations; ground water; Hanford Site; hydrographs; isotopes; metals; migration of elements; numerical models; pollution; radioactive isotopes; reactive transport; seasonal variations; solutes; surface water; transport; United States; uranium; Washington; water pollution; water table DO - http://dx.doi.org/10.1002/2015WR018009 ER - TY - JOUR T1 - Versatile Synthesis and Fluorescent Labeling of ZIF-90 Nanoparticles for Biomedical Applications. AN - 1777489848; 26950894 AB - We describe a versatile method for the synthesis and fluorescent labeling of ZIF-90 nanoparticles (NPs). Gram-scale quantities of NPs can be produced under mild conditions, circumventing the need for high temperatures and extended reaction periods required by existing procedures. Monitoring the reaction in situ using UV-vis spectroscopy reveals that ZIF-90 NP nucleation in solution starts within seconds. In addition to reporting a method to reproducibly form sub-100 nm ZIF-90 particles, we show that particles of various sizes can be produced, ranging from 30 to 1000 nm, by altering amine chemistry or reaction temperature. The presence of linker aldehyde groups on the NP surface allows for postsynthetic labeling with amine-functionalized fluorescent dyes, providing utility for imaging within biological systems. In vitro cell studies show that ZIF-90 NPs have a high rate of cellular internalization, provide finite degradation periods of the order of several weeks, and are biocompatible with six different cell lines (>90% viable when incubated with NPs for up to 7 days). These features highlight the potential for use of ZIF-90 nanostructures in bioimaging and targeted drug delivery applications. JF - ACS applied materials & interfaces AU - Jones, Christopher G AU - Stavila, Vitalie AU - Conroy, Marissa A AU - Feng, Patrick AU - Slaughter, Brandon V AU - Ashley, Carlee E AU - Allendorf, Mark D AD - Sandia National Laboratories , Livermore, California 94551, United States. Y1 - 2016/03// PY - 2016 DA - March 2016 SP - 7623 EP - 7630 VL - 8 IS - 12 KW - Fluorescent Dyes KW - 0 KW - Index Medicus KW - cellular uptake KW - ZIF-90 KW - bioimaging KW - nanoparticle KW - surface functionalization KW - Animals KW - Cricetulus KW - HeLa Cells KW - Humans KW - CHO Cells KW - Cricetinae KW - Nanoparticles -- ultrastructure KW - Fluorescent Dyes -- chemistry KW - Nanoparticles -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777489848?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+applied+materials+%26+interfaces&rft.atitle=Versatile+Synthesis+and+Fluorescent+Labeling+of+ZIF-90+Nanoparticles+for+Biomedical+Applications.&rft.au=Jones%2C+Christopher+G%3BStavila%2C+Vitalie%3BConroy%2C+Marissa+A%3BFeng%2C+Patrick%3BSlaughter%2C+Brandon+V%3BAshley%2C+Carlee+E%3BAllendorf%2C+Mark+D&rft.aulast=Jones&rft.aufirst=Christopher&rft.date=2016-03-01&rft.volume=8&rft.issue=12&rft.spage=7623&rft.isbn=&rft.btitle=&rft.title=ACS+applied+materials+%26+interfaces&rft.issn=1944-8252&rft_id=info:doi/10.1021%2Facsami.5b11760 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-12-14 N1 - Date created - 2016-03-30 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acsami.5b11760 ER - TY - JOUR T1 - Pore-scale investigation on stress-dependent characteristics of granular packs and the impact of pore deformation on fluid distribution AN - 1832681591; 769333-12 AB - Understanding the effect of changing stress conditions on multiphase flow in porous media is of fundamental importance for many subsurface activities including enhanced oil recovery, water drawdown from aquifers, soil confinement, and geologic carbon storage. Geomechanical properties of complex porous systems are dynamically linked to flow conditions, but their feedback relationship is often oversimplified due to the difficulty of representing pore-scale stress deformation and multiphase flow characteristics in high fidelity. In this work, we performed pore-scale experiments of single- and multiphase flow through bead packs at different confining pressure conditions to elucidate compaction-dependent characteristics of granular packs and their impact on fluid flow. A series of drainage and imbibition cycles were conducted on a water-wet, soda-lime glass bead pack under varying confining stress conditions. Simultaneously, X-ray micro-CT was used to visualize and quantify the degree of deformation and fluid distribution corresponding with each stress condition and injection cycle. Micro-CT images were segmented using a gradient-based method to identify fluids (e.g., oil and water), and solid phase redistribution throughout the different experimental stages. Changes in porosity, tortuosity, and specific surface area were quantified as a function of applied confining pressure. Results demonstrate varying degrees of sensitivity of these properties to confining pressure, which suggests that caution must be taken when considering scalability of these properties for practical modeling purposes. Changes in capillary number with confining pressure are attributed to the increase in pore velocity as a result of pore contraction. However, this increase in pore velocity was found to have a marginal impact on average phase trapping at different confining pressures. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - Geofluids (Oxford) AU - Torrealba, V A AU - Karpyn, Z T AU - Yoon, H AU - Klise, K A AU - Crandall, D Y1 - 2016/02// PY - 2016 DA - February 2016 SP - 198 EP - 207 PB - Wiley-Blackwell, Oxford VL - 16 IS - 1 SN - 1468-8115, 1468-8115 KW - X-ray micro-computed tomography KW - petroleum KW - fluid phase KW - reservoir rocks KW - visualization KW - granular materials KW - confining pressure KW - experimental studies KW - carbon sequestration KW - drainage KW - cyclic processes KW - stress KW - tortuosity KW - fluid flow KW - porous materials KW - mechanical properties KW - deformation KW - porosity KW - imbibition KW - compaction KW - X-ray data KW - saturation KW - multiphase flow KW - computed tomography data KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832681591?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geofluids+%28Oxford%29&rft.atitle=Pore-scale+investigation+on+stress-dependent+characteristics+of+granular+packs+and+the+impact+of+pore+deformation+on+fluid+distribution&rft.au=Torrealba%2C+V+A%3BKarpyn%2C+Z+T%3BYoon%2C+H%3BKlise%2C+K+A%3BCrandall%2C+D&rft.aulast=Torrealba&rft.aufirst=V&rft.date=2016-02-01&rft.volume=16&rft.issue=1&rft.spage=198&rft.isbn=&rft.btitle=&rft.title=Geofluids+%28Oxford%29&rft.issn=14688115&rft_id=info:doi/10.1111%2Fgfl.12143 L2 - http://www.blackwellpublishing.com/journal.asp?ref=1468-8115 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Number of references - 24 N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - carbon sequestration; compaction; computed tomography data; confining pressure; cyclic processes; deformation; drainage; experimental studies; fluid flow; fluid phase; granular materials; imbibition; mechanical properties; multiphase flow; petroleum; porosity; porous materials; reservoir rocks; saturation; stress; tortuosity; visualization; X-ray data; X-ray micro-computed tomography DO - http://dx.doi.org/10.1111/gfl.12143 ER - TY - JOUR T1 - On the practical convergence of coda-based correlations; a window optimization approach AN - 1797538240; 2016-051564 AB - We present a novel optimization approach to improve the convergence of interstation coda correlation functions towards the medium's empirical Green's function. For two stations recording a series of impulsive events in a multiply scattering medium, we explore the impact of coda window selection through a Markov Chain Monte Carlo scheme, with the aim of generating a gather of correlation functions that is the most coherent and symmetric over events, thus recovering intuitive elements of the interstation Green's function without any nonlinear post-processing techniques. This approach is tested here for a 2-D acoustic finite difference model, where a much improved correlation function is obtained, as well as for a database of small impulsive icequakes recorded on Erebus Volcano, Antarctica, where similar robust results are shown. The average coda solutions, as deduced from the posterior probability distributions of the optimization, are further representative of the scattering strength of the medium, with stronger scattering resulting in a slightly delayed overall coda sampling. The recovery of singly scattered arrivals in the coda of correlation functions are also shown to be possible through this approach, and surface wave reflections from outer craters on Erebus volcano were mapped in this fashion. We also note that, due to the improvement of correlation functions over subsequent events, this approach can further be used to improve the resolution of passive temporal monitoring. JF - Geophysical Journal International AU - Chaput, J AU - Clerc, V AU - Campillo, M AU - Roux, P AU - Knox, H Y1 - 2016/02// PY - 2016 DA - February 2016 SP - 736 EP - 747 PB - Oxford University Press on behalf of The Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft and the European Geophysical Society VL - 204 IS - 2 SN - 0956-540X, 0956-540X KW - guided waves KW - Monte Carlo analysis KW - icequakes KW - statistical analysis KW - coda waves KW - optimization KW - Green function KW - elastic waves KW - correlation KW - interferometry KW - geometry KW - case studies KW - surface waves KW - Antarctica KW - seismicity KW - volcanic earthquakes KW - seismic waves KW - earthquakes KW - Mount Erebus KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538240?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Journal+International&rft.atitle=On+the+practical+convergence+of+coda-based+correlations%3B+a+window+optimization+approach&rft.au=Chaput%2C+J%3BClerc%2C+V%3BCampillo%2C+M%3BRoux%2C+P%3BKnox%2C+H&rft.aulast=Chaput&rft.aufirst=J&rft.date=2016-02-01&rft.volume=204&rft.issue=2&rft.spage=736&rft.isbn=&rft.btitle=&rft.title=Geophysical+Journal+International&rft.issn=0956540X&rft_id=info:doi/ L2 - http://gji.oxfordjournals.org/content/204/2/736.abstract http://www.blackwellpublishing.com/journal.asp?ref=0956-540X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 42 N1 - Document feature - illus. incl. geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-06-17 N1 - SubjectsTermNotLitGenreText - Antarctica; case studies; coda waves; correlation; earthquakes; elastic waves; geometry; Green function; guided waves; icequakes; interferometry; Monte Carlo analysis; Mount Erebus; optimization; seismic waves; seismicity; statistical analysis; surface waves; volcanic earthquakes ER - TY - JOUR T1 - Doped calcium manganites for advanced high-temperature thermochemical energy storage AN - 1776656113; PQ0002775199 AB - Developing efficient thermal storage for concentrating solar power plants is essential to reducing the cost of generated electricity, extending or shifting the hours of operation, and facilitating renewable penetration into the grid. Perovskite materials of the CaB sub(x)Mn sub(1-x)O sub( 3- delta ) family, where B=Al or Ti, promise improvements in cost and energy storage density over other perovskites currently under investigation. Thermogravimetric analysis of the thermal reduction and reoxidation of these materials was used to extract equilibrium thermodynamic parameters. The results demonstrate that these novel thermochemical energy storage media display the highest reaction enthalpy capacity for perovskites reported to date, with a reaction enthalpy of 390kJ/kg, a 56% increase over previously reported compositions. This communication presents the development and thermodynamic characteristics of CaTi sub(0.2)Mn sub(0.8)O sub(3- delta ) (CTM28) and CaAl sub(0.2)Mn sub(0.8)O sub(3- delta ) (CAM28) perovskites for high-temperature thermochemical storage. These materials are tuned to provide substantial stored heat to an air Brayton power cycle by both sensible enthalpy and an exothermic oxidation reaction at temperatures in excess of 1100 degree C. These novel materials exhibit a reaction enthalpy of 390kJ/kg, a 56% increase when compared with the previously reported La sub(0.3)Sr sub(0.7)Co sub(0.9)M sub(0.1)O sub(3- delta ) (LSCM3791) perovskite. JF - International Journal of Energy Research AU - Babiniec, Sean M AU - Coker, Eric N AU - Miller, James E AU - Ambrosini, Andrea AD - Materials, Devices, and Energy Technologies, Sandia National Laboratories, PO Box 5800, MS 0734, Albuquerque, NM 87185, USA. Y1 - 2016/02// PY - 2016 DA - February 2016 SP - 280 EP - 284 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 40 IS - 2 SN - 0363-907X, 0363-907X KW - Environment Abstracts KW - Storage KW - Communications KW - Calcium KW - Thermodynamics KW - Energy KW - Electric power generation KW - Energy research KW - Oxidation KW - Temperature KW - Solar energy KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1776656113?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Energy+Research&rft.atitle=Doped+calcium+manganites+for+advanced+high-temperature+thermochemical+energy+storage&rft.au=Babiniec%2C+Sean+M%3BCoker%2C+Eric+N%3BMiller%2C+James+E%3BAmbrosini%2C+Andrea&rft.aulast=Babiniec&rft.aufirst=Sean&rft.date=2016-02-01&rft.volume=40&rft.issue=2&rft.spage=280&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Energy+Research&rft.issn=0363907X&rft_id=info:doi/10.1002%2Fer.3467 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Storage; Calcium; Communications; Thermodynamics; Energy research; Electric power generation; Energy; Oxidation; Temperature; Solar energy DO - http://dx.doi.org/10.1002/er.3467 ER - TY - JOUR T1 - 3D printing and digital rock physics for geoscience applications AN - 1873350408; 2017-013533 AB - The mechanical and fluid flow properties in fractured and porous media are fundamental to predicting coupled multiphysics processes in the subsurface. Recent advances in experimental methods and multi-scale imaging capabilities have revolutionized our ability to quantitatively characterize geomaterials, which allows us to reach ever-increasing spatial resolution across scales. Digital rocks reconstructed from multiscale images (e.g., microCT images) and theoretical/stochastic generations are now routinely used to characterize petrophysical and mechanical properties across scales. Additive manufacturing, commonly known as 3D printing, is a fast-growing manufacturing technique that produces custom parts or whole products by printing materials by layers only where it is needed. For geoscience applications, 3D printing technology can be co-opted to print reproducible porous and fractured structures derived from CT-imaging of actual rocks and theoretical algorithms for experimental testing. The use of 3D printed microstructure allows us to overcome sample-to-sample heterogeneity that plague rock physics testing and to test material response independent from pore-structure variability. Integration of imaging, digital rocks and 3D printing potentially enables us to develop a new workflow for understanding coupled petrophysical and mechanical processes in a well-defined setting with the improved reproducibility, enabling full characterization and thus connection of physical phenomena to structure. In this talk we will present our preliminary works with coupled multiscale experimental and numerical analysis using 3D printed fractured rock specimens. In particular, we discuss the processes of selection and printing of fractured specimens and small cylinder cores with various materials to study fluid flow characterization and geomechanical testing. We will also discuss the innovative advancement of 3D printing techniques applicable for coupled processes in the subsurface. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - Abstracts with Programs - Geological Society of America AU - Yoon, Hongkyu AU - Martinez, Mario J AU - Dewers, Thomas AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 28 EP - 2 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873350408?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=3D+printing+and+digital+rock+physics+for+geoscience+applications&rft.au=Yoon%2C+Hongkyu%3BMartinez%2C+Mario+J%3BDewers%2C+Thomas%3BAnonymous&rft.aulast=Yoon&rft.aufirst=Hongkyu&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - A Pitzer model for Na (super +) -Nd (super 3+) -So (sub 4) (super 2-) -H (super +) -OH (super -) system to high ionic strengths AN - 1873349163; 2017-014049 AB - In this work, the measured solubilities of Nd(OH) (sub 3) (s) in Na (sub 2) SO (sub 4) solutions up to 1.8 mol.kg (super -1) from our work are combined with the literature solubility data on Nd (sub 2) (SO (sub 4) ).8H (sub 2) O in H (sub 2) SO (sub 4) solutions to develop a Pitzer model to describe the Na (super +) -Nd (super 3+) -SO (sub 4) (super 2-) -H (super +) -OH (super -) system to high ionic strengths, applicable to nuclear waste isolation and recovery of Rare earth elements (REE) from acidic mine drainage. REE are critical elements, as they are widely used in numerous industries. At the same time, REE such as Nd(III), are used as good analogs to transuranic actinide elements in +III oxidation state in nuclear waste management. In particular, in the field of nuclear waste management, natural groundwaters such as brines associated with salt formations, may contain relatively high concentrations of sulfate, and the interactions between sulfate and actinides are important. As an example, in the Waste Isolation Pilot Plant (WIPP), a U.S. DOE geological repository for defense-related transuranic waste in the bedded salt formations in New Mexico, USA, the sulfate concentrations in the two WIPP brines that are important for performance assessment, i.e., Generic Weep Brine (GWB), and Energy Research and Development Administration (WIPP Well) 6 (ERDA-6), are 0.203 mol.kg (super -1) and 0.187 mol.kg (super -1) , respectively. In the low level and intermediate level radioactive sulfate liquid waste in Spain, they are very rich in Na (sub 2) SO (sub 4) with SO (sub 4) (super 2-) concentrations up to 2.2 mol.kg (super -1) . Acidic mine drainages with high sulfate concentrations are potentially the new resources for REE, as they have relatively high concentrations of REE. For instance, the acidic mine drainages from Spain have REE concentrations up to approximately 70 mmol.kg (super -1) , and the acidic mine drainages in coal mines from China have REE concentrations up to approximately 1 mmol.kg (super -1) . Therefore, the Pitzer model from this work could also be applied for recovery of REE from acidic mine drainages. JF - Abstracts with Programs - Geological Society of America AU - Xiong, Yongliang AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 215 EP - 6 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873349163?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=A+Pitzer+model+for+Na+%28super+%2B%29+-Nd+%28super+3%2B%29+-So+%28sub+4%29+%28super+2-%29+-H+%28super+%2B%29+-OH+%28super+-%29+system+to+high+ionic+strengths&rft.au=Xiong%2C+Yongliang%3BAnonymous&rft.aulast=Xiong&rft.aufirst=Yongliang&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - New approaches to relating the macroscopic behavior of shales to pore-scale constitutive properties AN - 1873348844; 2017-013600 AB - Shales are heterogeneous fine grained rocks that possess pore sizes ranging from the nanometer to the supra-micron scale. Such small sizes are not amenable to optical investigation, which has until recently prevented pore-scale investigations into shale behavior, particularly under in situ conditions. Macroscopic thermal, hydrological, mechanical, and chemical constitutive behaviors (e.g. swelling, dry-out, yield and failure, osmotic flux) are all macroscopic manifestations of the pore-scale, i.e. nano-behavior with nanopores containing fluid phases that differ in properties from the bulk. Characterization is not just a description of what, but should also include an assessment of the how and why of constitutive behaviors. Recent technological advances are enabling an unprecedented advancement in the characterization of shale multiphysics. We examine new and on-going efforts in shale characterization, with special attention given to in situ imaging methods. These methods are yielding unprecedented understanding of shale behavior in the subsurface and attendant responses to engineering perturbations of fluid injection, waste storage, and resource extraction including geologic carbon storage. We present a novel organizing framework to describe the multiscale features and coupled processes that govern macroscopic constitutive behavior. This work was funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award Number DE-SC0006883. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - Abstracts with Programs - Geological Society of America AU - Heath, Jason AU - Dewers, Thomas AU - Rinehart, Alex AU - Yoon, Hongkyu AU - Mozley, Peter AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 33 EP - 3 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873348844?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=New+approaches+to+relating+the+macroscopic+behavior+of+shales+to+pore-scale+constitutive+properties&rft.au=Heath%2C+Jason%3BDewers%2C+Thomas%3BRinehart%2C+Alex%3BYoon%2C+Hongkyu%3BMozley%2C+Peter%3BAnonymous&rft.aulast=Heath&rft.aufirst=Jason&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Multiscale characteristics of mechanical and compositional properties in Mancos Shale AN - 1873348684; 2017-013608 AB - Multiscale characteristics of textural and compositional (e.g., clay, cement, organics, etc.) heterogeneity profoundly influence the mechanical properties of shale. In particular, strongly anisotropic (i.e., laminated) heterogeneities are often observed to have a significant influence on hydrological and mechanical properties. In this work, we investigate shale samples of the Cretaceous Mancos Shale to explore the importance of a variety of geologic variables, including lamination, cements, organic content, and the spatial distribution of these characteristics. Mechanical testing of the samples included: axisymmetric compressive tests to determine the mechanical properties of samples with various micro-lithofacies; Brazilian disk tests to evaluate the impact of local heterogeneity on failure characteristics; and nano-indentation to investigate heterogeneous mechanical response at the micron scale. Comparison of mechanical response with compositional heterogeneity is useful to mechanistically evaluate the relationship between mechanical response and micro-lithofacies features across scales. Phase field modeling was employed to evaluate crack initiation and propagation in shale during Brazilian tests using mineralogical mapping, micro-lithofacies characterization, and digital image correlation. Comparison of core-scale mechanical testing and phase field modeling results reveal the significance of microscale properties in the mechanical response on the core samples. This work provides a robust workflow to develop a multi-scale understanding of mechanical response in laminated heterolithic shale. This work was funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award Number DE-SC0006883. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - Abstracts with Programs - Geological Society of America AU - Yoon, Hongkyu AU - Ingraham, Mathew D AU - Grigg, Joseph AU - Mozley, Peter AU - Heath, Jason AU - Dewers, Thomas AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 33 EP - 12 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873348684?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Multiscale+characteristics+of+mechanical+and+compositional+properties+in+Mancos+Shale&rft.au=Yoon%2C+Hongkyu%3BIngraham%2C+Mathew+D%3BGrigg%2C+Joseph%3BMozley%2C+Peter%3BHeath%2C+Jason%3BDewers%2C+Thomas%3BAnonymous&rft.aulast=Yoon&rft.aufirst=Hongkyu&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-03-02 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Control of process for subsurface science and engineering; examples from geologic carbon storage AN - 1869032416; 2017-011498 AB - Subsurface engineering for waste storage or resource extraction aims for controllable outcomes. In geologic carbon storage, these include using pore space with unprecedented efficiency, sustaining injectivity over the lifetime of an injection project, and avoiding unwanted or emergent risky consequences. We discuss field, experimental, and modeling examples of these and the challenges posed for research and implementation. Observed changes in reservoir response accompanying CO (sub 2) injection at the Cranfield site, along with a suite of lab tests, shows potential for use of injectate chemistry as a means to alter fracture permeability (with concomitant improvements for sweep and storage efficiency). Further control of reservoir sweep attends brine extraction from reservoirs, with further benefit for pressure control, mitigation of reservoir and wellbore damage, and water use. State-of-the-art validated models predict the extent of damage and deformation associated with pore pressure hazards in reservoirs, timing and location of networks and cascades of fractures, and development of localized leakage pathways in caprock. Experimentally validated geomechanics models can show where wellbore failure occurs during injection, and efficiency of repair methods using nanocomposites. Perhaps the simplest route to control is knowledge of heterogeneity and where best to inject (or not). An example is use of waste zones or leaky seals to both reduce pore pressure hazards and enhance residual trapping. Together, these examples highlight current research aimed at prevention of emergent subsurface failure modes, assurance of caprock integrity, and subsurface storage security. This work was supported as part of the Center for Frontiers of Subsurface Energy Security (CFSES), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award Number DE-SC0001114. Additional funding is from the U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL). Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - Abstracts with Programs - Geological Society of America AU - Dewers, Thomas AU - Eichhubl, Peter AU - Ganis, Ben AU - Wheeler, Mary F AU - White, Deandra AU - Major, Jonathan AU - Heath, Jason AU - Jammoul, Mohamad AU - Kobos, Peter AU - Liu, Ruijie AU - Matteo, Ed AU - Rinehart, Alex AU - Sobolik, Steve AU - Stormont, John AU - Taha, Mahmoud AU - Newell, Pania AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 4 EP - 1 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869032416?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Control+of+process+for+subsurface+science+and+engineering%3B+examples+from+geologic+carbon+storage&rft.au=Dewers%2C+Thomas%3BEichhubl%2C+Peter%3BGanis%2C+Ben%3BWheeler%2C+Mary+F%3BWhite%2C+Deandra%3BMajor%2C+Jonathan%3BHeath%2C+Jason%3BJammoul%2C+Mohamad%3BKobos%2C+Peter%3BLiu%2C+Ruijie%3BMatteo%2C+Ed%3BRinehart%2C+Alex%3BSobolik%2C+Steve%3BStormont%2C+John%3BTaha%2C+Mahmoud%3BNewell%2C+Pania%3BAnonymous&rft.aulast=Dewers&rft.aufirst=Thomas&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-02-17 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - The kISMET (permeability (K) and induced seismicity management for energy technologies) project; an underground field laboratory for investigating the relations between natural and induced fractures, stress field, and rock fabric AN - 1869032103; 2017-011506 AB - kISMET is part of the US Department of Energy's Subsurface Technology & Engineering Research (SubTER) crosscutting initiative for adaptive control of fractures, reactions, and flow in the subsurface. The project is located at the Sanford Underground Research Facility (SURF) in the former Homestake gold mine in Lead, SD. The kISMET site consists of five closely spaced near-vertical boreholes on the 4850 level that are designed for a series of hydraulic fracturing stress measurements and induced-fracture stimulation experiments. Four of the boreholes are HQ-sized holes that are 50 m in depth and will host monitoring sensors; in conjunction with a central NQ borehole they form a five-spot pattern at depth. The monitoring boreholes are located nearly equal 3 m away from the central borehole, allowing for very precise monitoring of fracture initiation and growth. The host rock is the Poorman Formation, a highly foliated phyllite that is steeply dipping at the kISMET site. Initial characterization of the site is being conducted using core samples, televiewer logs, and extensive preexisting geologic data. A straddle packer assembly will be installed at several depths in the central borehole to conduct stress measurements, and later to perform a series of hydrofracture stimulations. Preliminary analytical and numerical fracture initiation and growth model simulations conducted using existing geomechanical data for the Poorman phyllite suggest rock breakdown pressures in the range of 35-50 MPa. Two primary methods will be employed to monitor the experiments: continuous active-source seismic monitoring (CASSM) and electrical resistivity tomography (ERT); these will be complemented by passive microseismic (MEQ), pore pressure and injection rate monitoring. These experiments are aimed at understanding the effects of stress state, rock fabric, existing fractures, and stimulation approach on the character of the fracture(s) created (e.g., permeability enhancement, size, orientation, aperture), the fracturing process, and the associated induced microseismicity. Results of this research will be directly applicable to fracture stimulation and reservoir creation in Enhanced Geothermal Systems (EGS). JF - Abstracts with Programs - Geological Society of America AU - Dobson, Patrick F AU - Oldenburg, Curtis M AU - Daley, Thomas M AU - Birkholzer, Jens T AU - Cook, Paul J AU - Ajo-Franklin, Jonathan AU - Rutqvist, Jonny AU - Siler, Drew L AU - Kneafsey, Timothy J AU - Nakagawa, Seiji AU - Wu, Yuxin AU - Guglielmi, Yves AU - Ulrich, Craig AU - Wang, Herb F AU - Haimson, Bezalel C AU - Sone, Hiroki AU - Vigilante, Peter AU - Roggenthen, William M AU - Doe, Thomas W AU - Lee, Moo Y AU - Mattson, Earl D AU - Huang, Hai AU - Johnson, Timothy J AU - Morris, Joseph P AU - White, Joshua A AU - Johnson, Paul A AU - Coblentz, David D AU - Heise, Jaret AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 4 EP - 9 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 KW - 27A:Economic geology, geology of ore deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1869032103?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=The+kISMET+%28permeability+%28K%29+and+induced+seismicity+management+for+energy+technologies%29+project%3B+an+underground+field+laboratory+for+investigating+the+relations+between+natural+and+induced+fractures%2C+stress+field%2C+and+rock+fabric&rft.au=Dobson%2C+Patrick+F%3BOldenburg%2C+Curtis+M%3BDaley%2C+Thomas+M%3BBirkholzer%2C+Jens+T%3BCook%2C+Paul+J%3BAjo-Franklin%2C+Jonathan%3BRutqvist%2C+Jonny%3BSiler%2C+Drew+L%3BKneafsey%2C+Timothy+J%3BNakagawa%2C+Seiji%3BWu%2C+Yuxin%3BGuglielmi%2C+Yves%3BUlrich%2C+Craig%3BWang%2C+Herb+F%3BHaimson%2C+Bezalel+C%3BSone%2C+Hiroki%3BVigilante%2C+Peter%3BRoggenthen%2C+William+M%3BDoe%2C+Thomas+W%3BLee%2C+Moo+Y%3BMattson%2C+Earl+D%3BHuang%2C+Hai%3BJohnson%2C+Timothy+J%3BMorris%2C+Joseph+P%3BWhite%2C+Joshua+A%3BJohnson%2C+Paul+A%3BCoblentz%2C+David+D%3BHeise%2C+Jaret%3BAnonymous&rft.aulast=Dobson&rft.aufirst=Patrick&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2017-01-01 N1 - PubXState - CO N1 - Last updated - 2017-02-17 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Experimental Determination of Solubility of Nd(OH)3(s) in Na2SO4 Solutions to High Ionic Strength: Applications to Nuclear Waste Isolation AN - 1861113251; 782780-77 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Xiong, Yongliang AU - Kirkes, Leslie AU - Marrs, Cassie AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 3477 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861113251?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Experimental+Determination+of+Solubility+of+Nd%28OH%293%28s%29+in+Na2SO4+Solutions+to+High+Ionic+Strength%3A+Applications+to+Nuclear+Waste+Isolation&rft.au=Xiong%2C+Yongliang%3BKirkes%2C+Leslie%3BMarrs%2C+Cassie%3BAnonymous&rft.aulast=Xiong&rft.aufirst=Yongliang&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=3477&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2016/uploads/abstracts/finalPDFs/3477.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2016 N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Imaging fracture networks using joint seismic and electrical change detection techniques AN - 1861110676; 787345-16 AB - Imaging fractures is a notoriously difficult task. Generally speaking this difficulty is attributed to the tortuous nature and fine structure in fractured systems. These features are often challenging to resolve in field settings due to temporal and/or spatial constraints. In an effort to highlight the advancements in geophysical imaging of fractures, as well as the topics where the most gain could be realized from targeted research, this SubTER team undertook a number of extensive near field fracture imaging experiments. During the initially phase of this SubTER project, Sandia National Labs (SNL) conducted a series of high resolution seismic imaging campaigns designed to characterize induced fractures. Fractures were emplaced using a novel explosive source that limits damage to the borehole. In the next phase of the project, SNL and its collaborators (LBNL, LLNL, and PNNL) developed and demonstrated emerging seismic and electrical geophysical imaging technologies that characterized 1) the 3D extent and distribution of fractures stimulated from the explosive source, 2) 3D fluid transport within the stimulated fracture network through use of a particulate tracer, and 3) fracture attributes through advanced data analysis. The project consisted of two phases. The objective of the first phase was to collect a comprehensive set of 4D crosshole seismic and electrical data to image the fracture network generated from a novel explosive source. In addition, autonomous seismic and electrical resistance tomography (ERT) data were collected to image the migration of a tracer designed to enhance the electrical conductivity contrast of the fracture network. Near real-time 4D ERT imaging was tested and demonstrated during this phase. The objective of the second phase was to use data collected during the first phase to 1) develop methods of estimating fracture attributes from seismic data, 2) develop methods of assimilating disparate and transient data sets to improve fracture network imaging resolution, and 3) advance capabilities for near real-time inversion of cross-hole tomographic data. Advancements in these areas are relevant to all situations where fracture stimulation is used for reservoir stimulation (e.g. Enhanced Geothermal Systems (EGS) and tight shale gases). JF - Abstracts with Programs - Geological Society of America AU - Knox, Hunter Anne AU - Ajo-Franklin, Jonathan AU - Johnson, Timothy AU - Morris, Joseph AU - Grubelich, Mark AU - King, Dennis AU - Preston, Leiph AU - Knox, James AU - Vermeul, Vince AU - James, Stephanie AU - Strickland, Christopher AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 57 EP - 5 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861110676?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Imaging+fracture+networks+using+joint+seismic+and+electrical+change+detection+techniques&rft.au=Knox%2C+Hunter+Anne%3BAjo-Franklin%2C+Jonathan%3BJohnson%2C+Timothy%3BMorris%2C+Joseph%3BGrubelich%2C+Mark%3BKing%2C+Dennis%3BPreston%2C+Leiph%3BKnox%2C+James%3BVermeul%2C+Vince%3BJames%2C+Stephanie%3BStrickland%2C+Christopher%3BAnonymous&rft.aulast=Knox&rft.aufirst=Hunter&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Site characterization for the deep borehole field test AN - 1861109080; 787355-26 AB - The US Department of Energy Office of Nuclear Energy is beginning a 5-year Deep Borehole Field Test to investigate the feasibility of constructing and characterizing two large-diameter boreholes in crystalline basement rock to a depth of 5 km. The concept of deep borehole disposal for radioactive waste has some possible advantages over mined repositories, including incremental construction and loading, and the enhanced natural barriers provided by deep continental crystalline basement. Site characterization efforts at a future disposal site would be centered around determining the following characteristics: presence and nature of vertical pore fluid potential gradients, presence of economically exploitable natural resources, and presence of high permeability fault or fracture zone connections to the shallow subsurface. Characterization activities at the field test site will include geomechanical (i.e., rock in situ stress state, and fluid pressure), geological (i.e., rock and fracture infill lithology), hydrological (i.e., quantity of fluid, fluid convection properties, and solute transport mechanisms), and chemical (i.e., rock-water interaction and natural tracers) aspects. We discuss both direct (i.e., sampling and in situ testing) and indirect (i.e., borehole geophysical) methods for efficient and effective characterization of these site features or physical processes in large diameter boreholes with possibly elevated temperature and extensive borehole breakouts. Borehole-based characterization will be demonstrated at the field test site to determine the variability of system state (i.e., stress, pressure, temperature, and chemistry) with depth and interpretation of material and system parameters relevant to numerical site simulation. JF - Abstracts with Programs - Geological Society of America AU - Kuhlman, Kristopher L AU - Sassani, David C AU - Freeze, Geoff A AU - Hardin, Ernest AU - Brady, Patrick V AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 131 EP - 13 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861109080?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Site+characterization+for+the+deep+borehole+field+test&rft.au=Kuhlman%2C+Kristopher+L%3BSassani%2C+David+C%3BFreeze%2C+Geoff+A%3BHardin%2C+Ernest%3BBrady%2C+Patrick+V%3BAnonymous&rft.aulast=Kuhlman&rft.aufirst=Kristopher&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Deep geologic disposal of radioactive waste:a multiple options for long-term isolation AN - 1861109009; 787355-14 AB - Worldwide, every nation that has a significant inventory of spent nuclear fuel and high-level radioactive waste has come to the conclusion that deep geologic disposal is the scientifically preferred option for isolating wastes from the human environment.aMany nations are in various stages of planning or developing mined repositories for radioactive waste disposal, relying on a range of disposal concepts that take advantage of the potentially available rock types. For example, Finland is moving forward with plans for a repository in Precambrian gneiss, Sweden is seeking authorization for a repository in granite, France is conducting research in argillite, Canada is considering both granitic and sedimentary rocks, Germany has extensively investigated disposal options in salt, and the US has disposed of intermediate-level transuranic waste in salt at the Waste Isolation Pilot Plant in New Mexico. Since work on the formerly proposed Yucca Mountain repository in Nevada was terminated in 2010, the US Department of Energy has conducted research and development on generic disposal concepts in multiple lithologies, including salt, crystalline rock, and argillaceous rock. Detailed assessments of the long-term performance of different disposal concepts indicate the primary factors contributing to robust isolation vary depending on details of the geologic setting and the design of the engineered system, including waste packaging, chosen for the site-specific subsurface environment. Overall, decades of research and development in the US and other nations support a conclusion that robust isolation is achievable in many lithologies by relying on various combinations of natural and engineered barriers. Sandia National Laboratories is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. This abstract is Sandia publication SAND2016-6666 A. JF - Abstracts with Programs - Geological Society of America AU - Swift, Peter N AU - Sassani, David C AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 131 EP - 1 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861109009?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Deep+geologic+disposal+of+radioactive+waste%3Aa+multiple+options+for+long-term+isolation&rft.au=Swift%2C+Peter+N%3BSassani%2C+David+C%3BAnonymous&rft.aulast=Swift&rft.aufirst=Peter&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Evaluating geologic site guidelines for a deep borehole field test AN - 1861107922; 787355-24 AB - The US DOE Office of Nuclear Energy Used Nuclear Fuel Disposition Campaign (UFDC) is initiating a Deep Borehole Field Test (DBFT), which will not use any radioactive waste, to evaluate the geoscience bases and technical feasibility for implementation of deep borehole disposal (DBD). DOE has identified Sandia National Laboratories (SNL) as the Technical Lead for the UFDC DBFT Project for supporting DOE in (i) developing the overall DBFT Project Plan, (ii) managing/integrating of all DBFT Project activities, and (iii) providing technical guidance to DOE, other DOE National Laboratories, and university partners. The DBFT includes drilling one Characterization Borehole (CB-8.5" diameter), followed by an optional Field Test Borehole (FTB), to a depth of about 5,000 m (16,400 feet) into crystalline basement rock in a geologically stable continental location. The DBFT CB will be drilled and completed to facilitate downhole scientific testing and analyses. If site conditions are found to be favorable, DOE may drill the larger-diameter (17") FTB to facilitate proof-of-concept of handling, emplacement, and retrieval activities using surrogate waste containers. Discussion will cover guidelines for favorable DBFT site geohydrochemicalmechanical characteristics, example data sets for sites, and status of the DBFT Project. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. SAND2015- 6664A. JF - Abstracts with Programs - Geological Society of America AU - Sassani, David C AU - Kuhlman, Kristopher L AU - Freeze, Geoff A AU - MacKinnon, Robert AU - Hardin, Ernest AU - Brady, Patrick V AU - Perry, Frank AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 131 EP - 11 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861107922?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Evaluating+geologic+site+guidelines+for+a+deep+borehole+field+test&rft.au=Sassani%2C+David+C%3BKuhlman%2C+Kristopher+L%3BFreeze%2C+Geoff+A%3BMacKinnon%2C+Robert%3BHardin%2C+Ernest%3BBrady%2C+Patrick+V%3BPerry%2C+Frank%3BAnonymous&rft.aulast=Sassani&rft.aufirst=David&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Multiscale characteristics of mechanical and compositional properties in Mancos Shale AN - 1861101315; 787342-22 AB - Multiscale characteristics of textural and compositional (e.g., clay, cement, organics, etc.) heterogeneity profoundly influence the mechanical properties of shale. In particular, strongly anisotropic (i.e., laminated) heterogeneities are often observed to have a significant influence on hydrological and mechanical properties. In this work, we investigate shale samples of the Cretaceous Mancos Shale to explore the importance of a variety of geologic variables, including lamination, cements, organic content, and the spatial distribution of these characteristics. Mechanical testing of the samples included:aaxisymmetric compressive tests to determine the mechanical properties of samples with various micro-lithofacies; Brazilian disk tests to evaluate the impact of local heterogeneity on failure characteristics; and nano-indentationato investigate heterogeneous mechanical response at the micron scale.aComparison of mechanical response with compositional heterogeneity is useful to mechanistically evaluate the relationship between mechanical response and micro-lithofacies features across scales. Phase field modeling was employed to evaluateacrack initiation and propagation in shale during Brazilian tests using mineralogical mapping, micro-lithofacies characterization, and digital image correlation. Comparison of core-scale mechanical testing and phase field modeling results reveal the significance of microscale properties in the mechanical response on the core samples. This work provides a robust workflow to develop a multi-scale understanding of mechanical response in laminated heterolithic shale. This work was funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award Number DE-SC0006883. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - Abstracts with Programs - Geological Society of America AU - Yoon, Hongkyu AU - Ingraham, Mathew D AU - Grigg, Joseph AU - Mozley, Peter AU - Heath, Jason AU - Dewers, Thomas AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 33 EP - 12 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861101315?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Multiscale+characteristics+of+mechanical+and+compositional+properties+in+Mancos+Shale&rft.au=Yoon%2C+Hongkyu%3BIngraham%2C+Mathew+D%3BGrigg%2C+Joseph%3BMozley%2C+Peter%3BHeath%2C+Jason%3BDewers%2C+Thomas%3BAnonymous&rft.aulast=Yoon&rft.aufirst=Hongkyu&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - 3D printing and digital rock physics for geoscience applications AN - 1861101095; 787341-47 AB - The mechanical and fluid flow properties in fractured and porous media are fundamental to predicting coupled multiphysics processes in the subsurface. Recent advances in experimental methods and multi-scale imaging capabilities have revolutionized our ability to quantitatively characterize geomaterials, which allows us to reach ever-increasing spatial resolution across scales. Digital rocks reconstructed from multiscale images (e.g., microCT images) and theoretical/stochastic generations are now routinely used to characterize petrophysical and mechanical properties across scales. Additive manufacturing, commonly known as 3D printing, is a fast-growing manufacturing technique that produces custom parts or whole products by printing materials by layers only where it is needed. For geoscience applications, 3D printing technology can be co-opted to print reproducible porous and fractured structures derived from CT-imaging of actual rocks and theoretical algorithms for experimental testing. The use of 3D printed microstructure allows us to overcome sample-to-sample heterogeneity that plague rock physics testing and to test material response independent from pore-structure variability. Integration of imaging, digital rocks and 3D printing potentially enables us to develop a new workflow for understanding coupled petrophysical and mechanical processes in a well-defined setting with the improved reproducibility, enabling full characterization and thus connection of physical phenomena to structure. In this talk we will present our preliminary works with coupled multiscale experimental and numerical analysis using 3D printed fractured rock specimens. In particular, we discuss the processes of selection and printing of fractured specimens and small cylinder cores with various materials to study fluid flow characterization and geomechanical testing. We will also discuss the innovative advancement of 3D printing techniques applicable for coupled processes in the subsurface. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - Abstracts with Programs - Geological Society of America AU - Yoon, Hongkyu AU - Martinez, Mario J AU - Dewers, Thomas AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 28 EP - 2 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861101095?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=3D+printing+and+digital+rock+physics+for+geoscience+applications&rft.au=Yoon%2C+Hongkyu%3BMartinez%2C+Mario+J%3BDewers%2C+Thomas%3BAnonymous&rft.aulast=Yoon&rft.aufirst=Hongkyu&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - New approaches to relating the macroscopic behavior of shales to pore-scale constitutive properties AN - 1861100919; 787342-14 AB - Shales are heterogeneous fine grained rocks that possess pore sizes ranging from the nanometer to the supra-micron scale. Such small sizes are not amenable to optical investigation, which has until recently prevented pore-scale investigations into shale behavior, particularly under in situ conditions. Macroscopic thermal, hydrological, mechanical, and chemical constitutive behaviors (e.g. swelling, dry-out, yield and failure, osmotic flux) are all macroscopic manifestations of the pore-scale, i.e. nano-behavior with nanopores containing fluid phases that differ in properties from the bulk. Characterization is not just a description of what, but should also include an assessment of the how and why of constitutive behaviors. Recent technological advances are enabling an unprecedented advancement in the characterization of shale multiphysics. We examine new and on-going efforts in shale characterization, with special attention given to in situ imaging methods. These methods are yielding unprecedented understanding of shale behavior in the subsurface and attendant responses to engineering perturbations of fluid injection, waste storage, and resource extraction including geologic carbon storage.aWe present a novel organizing framework to describe the multiscale features and coupled processes that govern macroscopic constitutive behavior. This work was funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award Number DE-SC0006883. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - Abstracts with Programs - Geological Society of America AU - Heath, Jason AU - Dewers, Thomas AU - Rinehart, Alex AU - Yoon, Hongkyu AU - Mozley, Peter AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - Abstract no. 33 EP - 3 PB - Geological Society of America (GSA), Boulder, CO VL - 48 IS - 7 SN - 0016-7592, 0016-7592 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1861100919?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=New+approaches+to+relating+the+macroscopic+behavior+of+shales+to+pore-scale+constitutive+properties&rft.au=Heath%2C+Jason%3BDewers%2C+Thomas%3BRinehart%2C+Alex%3BYoon%2C+Hongkyu%3BMozley%2C+Peter%3BAnonymous&rft.aulast=Heath&rft.aufirst=Jason&rft.date=2016-01-01&rft.volume=48&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2016 annual meeting & exposition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Thermodynamic Modeling of Siderite and Chukanovite in the WIPP Relevant Brines AN - 1832669720; 782761-11 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Kim, Sungtae AU - Kirkes, Leslie AU - Knox, Jandi AU - Dean, Justin AU - Jang, Je-Hun AU - Anonymous Y1 - 2016 PY - 2016 DA - 2016 SP - 1511 PB - Goldschmidt Conference, [varies] VL - 26 SN - 1042-7287, 1042-7287 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832669720?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Thermodynamic+Modeling+of+Siderite+and+Chukanovite+in+the+WIPP+Relevant+Brines&rft.au=Kim%2C+Sungtae%3BKirkes%2C+Leslie%3BKnox%2C+Jandi%3BDean%2C+Justin%3BJang%2C+Je-Hun%3BAnonymous&rft.aulast=Kim&rft.aufirst=Sungtae&rft.date=2016-01-01&rft.volume=26&rft.issue=&rft.spage=1511&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2016/uploads/abstracts/finalPDFs/1511.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2016 N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Two-phase convective CO sub(2) dissolution in saline aquifers AN - 1827905683; PQ0003696491 AB - Geologic carbon storage in deep saline aquifers is a promising technology for reducing anthropogenic emissions into the atmosphere. Dissolution of injected CO sub(2) into resident brines is one of the primary trapping mechanisms generally considered necessary to provide long-term storage security. Given that diffusion of CO sub(2) in brine is woefully slow, convective dissolution, driven by a small increase in brine density with CO sub(2) saturation, is considered to be the primary mechanism of dissolution trapping. Previous studies of convective dissolution have typically only considered the convective process in the single-phase region below the capillary transition zone and have either ignored the overlying two-phase region where dissolution actually takes place or replaced it with a virtual region with reduced or enhanced constant permeability. Our objective is to improve estimates of the long-term dissolution flux of CO sub(2) into brine by including the capillary transition zone in two-phase model simulations. In the fully two-phase model, there is a capillary transition zone above the brine-saturated region over which the brine saturation decreases with increasing elevation. Our two-phase simulations show that the dissolution flux obtained by assuming a brine-saturated, single-phase porous region with a closed upper boundary is recovered in the limit of vanishing entry pressure and capillary transition zone. For typical finite entry pressures and capillary transition zone, however, convection currents penetrate into the two-phase region. This removes the mass transfer limitation of the diffusive boundary layer and enhances the convective dissolution flux of CO sub(2) more than 3 times above the rate assuming single-phase conditions. Key Points: * The two-phase model of capillary transition zone shows the long-term dissolution flux increases with entry pressure * The two-phase capillary transition zone can enhance the dissolution flux more than 3 times over the commonly studied single-phase model * The single-phase, closed top dissolution rate is recovered as the limit of vanishing entry pressure JF - Water Resources Research AU - Martinez, MJ AU - Hesse, MA AD - Engineering Sciences Center, Sandia National Laboratories, Albuquerque, New Mexico, USA. Y1 - 2016/01// PY - 2016 DA - January 2016 SP - 585 EP - 599 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 52 IS - 1 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Aquifers KW - Convection KW - Water resources KW - Convection development KW - Permeability KW - Carbon KW - Ground water KW - Modelling KW - Simulation Analysis KW - Transition Zone KW - Saturation KW - Carbon storage KW - Trapping KW - Storage KW - Numerical simulations KW - Convective activity KW - Mass transfer KW - Water resources research KW - Carbon dioxide KW - Fluctuations KW - Carbon Dioxide KW - Brines KW - AQ 00001:Water Resources and Supplies KW - Q2 09144:Regional studies, expeditions and data reports KW - SW 0810:General KW - M2 556.18:Water Management (556.18) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1827905683?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Two-phase+convective+CO+sub%282%29+dissolution+in+saline+aquifers&rft.au=Martinez%2C+MJ%3BHesse%2C+MA&rft.aulast=Martinez&rft.aufirst=MJ&rft.date=2016-01-01&rft.volume=52&rft.issue=1&rft.spage=585&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2015WR017085 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-10-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Convection; Permeability; Carbon; Ground water; Water resources; Mass transfer; Carbon dioxide; Modelling; Brines; Aquifers; Numerical simulations; Convective activity; Convection development; Water resources research; Carbon storage; Storage; Simulation Analysis; Transition Zone; Saturation; Trapping; Fluctuations; Carbon Dioxide DO - http://dx.doi.org/10.1002/2015WR017085 ER - TY - JOUR T1 - Creating orbiting vorticity vectors in magnetic particle suspensions through field symmetry transitions-a route to multi-axis mixing AN - 1808692047; PQ0003482359 AB - It has recently been reported that two types of triaxial electric or magnetic fields can drive vorticity in dielectric or magnetic particle suspensions, respectively. The first type-symmetry-breaking rational fields-consists of three mutually orthogonal fields, two alternating and one dc, and the second type-rational triads-consists of three mutually orthogonal alternating fields. In each case it can be shown through experiment and theory that the fluid vorticity vector is parallel to one of the three field components. For any given set of field frequencies this axis is invariant, but the sign and magnitude of the vorticity (at constant field strength) can be controlled by the phase angles of the alternating components and, at least for some symmetry-breaking rational fields, the direction of the dc field. In short, the locus of possible vorticity vectors is a 1-d set that is symmetric about zero and is along a field direction. In this paper we show that continuous, 3-d control of the vorticity vector is possible by progressively transitioning the field symmetry by applying a dc bias along one of the principal axes. Such biased rational triads are a combination of symmetry-breaking rational fields and rational triads. A surprising aspect of these transitions is that the locus of possible vorticity vectors for any given field bias is extremely complex, encompassing all three spatial dimensions. As a result, the evolution of a vorticity vector as the dc bias is increased is complex, with large components occurring along unexpected directions. More remarkable are the elaborate vorticity vector orbits that occur when one or more of the field frequencies are detuned. These orbits provide the basis for highly effective mixing strategies wherein the vorticity axis periodically explores a range of orientations and magnitudes. JF - Soft Matter AU - Martin, James E AU - Solis, Kyle J AD - Sandia National Laboratories; Nanomaterials Sciences; Albuquerque; New Mexico; USA 87185 Y1 - 2016/01// PY - 2016 DA - January 2016 SP - 1021 EP - 1031 PB - Royal Society of Chemistry VL - 12 IS - 4 SN - 1744-683X, 1744-683X KW - Biotechnology and Bioengineering Abstracts KW - Magnetic fields KW - Evolution KW - W 30965:Miscellaneous, Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1808692047?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Soft+Matter&rft.atitle=Creating+orbiting+vorticity+vectors+in+magnetic+particle+suspensions+through+field+symmetry+transitions-a+route+to+multi-axis+mixing&rft.au=Martin%2C+James+E%3BSolis%2C+Kyle+J&rft.aulast=Martin&rft.aufirst=James&rft.date=2016-01-01&rft.volume=12&rft.issue=4&rft.spage=1021&rft.isbn=&rft.btitle=&rft.title=Soft+Matter&rft.issn=1744683X&rft_id=info:doi/10.1039%2Fc5sm01975c LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Number of references - 14 N1 - Last updated - 2016-08-17 N1 - SubjectsTermNotLitGenreText - Magnetic fields; Evolution DO - http://dx.doi.org/10.1039/c5sm01975c ER - TY - JOUR T1 - Validation of Heat Transfer, Thermal Decomposition, and Container Pressurization of Polyurethane Foam Using Mean Value and Latin Hypercube Sampling Approaches AN - 1765977058; PQ0002538448 AB - Polymer foam encapsulants provide mechanical, electrical, and thermal isolation in engineered systems. It can be advantageous to surround objects of interest, such as electronics, with foams in a hermetically sealed container in order to protect them from hostile environments or from accidents such as fire. In fire environments, gas pressure from thermal decomposition of foams can cause mechanical failure of sealed systems. In this work, a detailed uncertainty quantification study of polymeric methylene diisocyanate (PMDI)-polyether-polyol based polyurethane foam is presented and compared to experimental results to assess the validity of a 3-D finite element model of the heat transfer and degradation processes. In this series of experiments, 320 kg/m super(3) PMDI foam in a 0.2 L sealed steel container is heated to 1,073 K at a rate of 150 K/min. The experiment ends when the can breaches due to the buildup of pressure. The temperature at key location is monitored as well as the internal pressure of the can. Both experimental uncertainty and computational uncertainty are examined and compared. The mean value method (MV) and Latin hypercube sampling (LHS) approach are used to propagate the uncertainty through the model. The results of the both the MV method and the LHS approach show that while the model generally can predict the temperature at given locations in the system, it is less successful at predicting the pressure response. Also, these two approaches for propagating uncertainty agree with each other, the importance of each input parameter on the simulation results is also investigated, showing that for the temperature response the conductivity of the steel container and the effective conductivity of the foam, are the most important parameters. For the pressure response, the activation energy, effective conductivity, and specific heat are most important. The comparison to experiments and the identification of the drivers of uncertainty allow for targeted development of the computational model and for definition of the experiments necessary to improve accuracy. JF - Fire Technology AU - Scott, Sarah N AU - Dodd, Amanda B AU - Larsen, Marvin E AU - Suo-Anttila, Jill M AU - Erickson, Ken L AD - Sandia National Laboratories, P.O. Box 969, MS 9042, Livermore, CA, 94551, USA, snscott@sandia.gov Y1 - 2016/01// PY - 2016 DA - January 2016 SP - 121 EP - 147 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 52 IS - 1 SN - 0015-2684, 0015-2684 KW - Health & Safety Science Abstracts KW - Finite element method KW - Fires KW - Containers KW - Specific heat KW - Degradation KW - Occupational safety KW - Temperature KW - Simulation KW - Thermal decomposition KW - Heat transfer KW - Accidents KW - Energy KW - Steel KW - Polymers KW - H 7000:Fire Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765977058?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Fire+Technology&rft.atitle=Validation+of+Heat+Transfer%2C+Thermal+Decomposition%2C+and+Container+Pressurization+of+Polyurethane+Foam+Using+Mean+Value+and+Latin+Hypercube+Sampling+Approaches&rft.au=Scott%2C+Sarah+N%3BDodd%2C+Amanda+B%3BLarsen%2C+Marvin+E%3BSuo-Anttila%2C+Jill+M%3BErickson%2C+Ken+L&rft.aulast=Scott&rft.aufirst=Sarah&rft.date=2016-01-01&rft.volume=52&rft.issue=1&rft.spage=121&rft.isbn=&rft.btitle=&rft.title=Fire+Technology&rft.issn=00152684&rft_id=info:doi/10.1007%2Fs10694-014-0448-8 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Number of references - 30 N1 - Last updated - 2016-02-29 N1 - SubjectsTermNotLitGenreText - Finite element method; Containers; Fires; Specific heat; Degradation; Occupational safety; Temperature; Thermal decomposition; Simulation; Heat transfer; Accidents; Energy; Steel; Polymers DO - http://dx.doi.org/10.1007/s10694-014-0448-8 ER - TY - JOUR T1 - Designed Synthesis of van der Waals Heterostructures: The Power of Kinetic Control. AN - 1760883763; 26545566 AB - Selecting specific 2D building blocks and specific layering sequences of van der Waals heterostructures should allow the formation of new materials with designed properties for specific applications. Unfortunately, the synthetic ability to prepare such structures at will, especially in a manner that can be manufactured, does not exist. Herein, we report the targeted synthesis of new metal-semiconductor heterostructures using the modulated elemental-reactant technique to nucleate specific 2D building blocks, control their thickness, and avoid epitaxial structures with long-range order. The building blocks, VSe2 and GeSe2 , have different crystal structures, which inhibits cation intermixing. The precise control of this approach enabled us to synthesize heterostructures containing GeSe2 monolayers alternating with VSe2 structural units with specific sequences. The transport properties systematically change with nanoarchitecture and a charge-density wave-like transition is observed. JF - Angewandte Chemie (International ed. in English) AU - Alemayehu, Matti B AU - Falmbigl, Matthias AU - Ta, Kim AU - Ditto, Jeffrey AU - Medlin, Douglas L AU - Johnson, David C AD - Department of Chemistry, University of Oregon, Eugene, OR 97403 (USA). matti@uoregon.edu. ; Department of Chemistry, University of Oregon, Eugene, OR 97403 (USA). ; Sandia National Laboratories, 7011 East Avenue, MS 9161, Livermore, CA 94551 (USA). ; Department of Chemistry, University of Oregon, Eugene, OR 97403 (USA). davej@uoregon.edu. Y1 - 2015/12/14/ PY - 2015 DA - 2015 Dec 14 SP - 15468 EP - 15472 VL - 54 IS - 51 KW - selenides KW - kinetic control KW - layered structures KW - van der Waals heterostructures KW - nanostructures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1760883763?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Angewandte+Chemie+%28International+ed.+in+English%29&rft.atitle=Designed+Synthesis+of+van+der+Waals+Heterostructures%3A+The+Power+of+Kinetic+Control.&rft.au=Alemayehu%2C+Matti+B%3BFalmbigl%2C+Matthias%3BTa%2C+Kim%3BDitto%2C+Jeffrey%3BMedlin%2C+Douglas+L%3BJohnson%2C+David+C&rft.aulast=Alemayehu&rft.aufirst=Matti&rft.date=2015-12-14&rft.volume=54&rft.issue=51&rft.spage=15468&rft.isbn=&rft.btitle=&rft.title=Angewandte+Chemie+%28International+ed.+in+English%29&rft.issn=1521-3773&rft_id=info:doi/10.1002%2Fanie.201506152 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-05-19 N1 - Date created - 2016-01-15 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1002/anie.201506152 ER - TY - JOUR T1 - Geomechanical modeling of CO (sub 2) injection site to predict wellbore stresses and strains for the design of wellbore seal repair materials AN - 1849310957; 2016-109287 AB - This paper will present the results of large-scale three-dimensional calculations simulating the hydrological-mechanical behavior of a CO (sub 2) injection reservoir and the resulting effects on wellbore casings and sealant repair materials. A critical aspect of designing effective wellbore seal repair materials is predicting thermo-mechanical perturbations in local stress that can compromise seal integrity. The DOE-NETL project "Wellbore Seal Repair Using Nanocomposite Materials," is interested in the stress-strain history of abandoned wells, as well as changes in local pressure, stress, and temperature conditions that accompany carbon dioxide injection or brine extraction. Two distinct computational models comprise the current modeling effort. The first is a field scale model that uses the stratigraphy, material properties, and injection history from a pilot CO (sub 2) injection operation in Cranfield, MS to develop a stress-strain history for wellbore locations from 100 to 400 meters from an injection well. The results from the field scale model are used as input to a more detailed model of a wellbore casing. The 3D wellbore model examines the impacts of various loading scenarios on a casing structure. This model has been developed in conjunction with bench-top experiments of an integrated seal system in an idealized scaled wellbore mock-up being used to test candidate seal repair materials. The results from these models will be used to estimate the necessary mechanical properties needed for a successful repair material. This material is based upon work supported by the US Department of Energy (DOE) National Energy Technology Laboratory (NETL) under Grant Number DE-FE0009562. This project is managed and administered by the Storage Division of the NETL and funded by DOE/NETL and cost-sharing partners. This work was funded in part by the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under Award DE-SC-0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the US Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Sobolik, Steven R AU - Gomez, Steven Paul AU - Matteo, Edward N AU - Stormont, John AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H13M EP - 08 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310957?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Geomechanical+modeling+of+CO+%28sub+2%29+injection+site+to+predict+wellbore+stresses+and+strains+for+the+design+of+wellbore+seal+repair+materials&rft.au=Sobolik%2C+Steven+R%3BGomez%2C+Steven+Paul%3BMatteo%2C+Edward+N%3BStormont%2C+John%3BAnonymous&rft.aulast=Sobolik&rft.aufirst=Steven&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Imaging fracture networks using angled crosshole seismic logging and change detection techniques AN - 1849310543; 2016-109405 AB - We present results from a SubTER funded series of cross borehole geophysical imaging efforts designed to characterize fracture zones generated with an alternative stimulation method, which is being developed for Enhanced Geothermal Systems (EGS). One important characteristic of this stimulation method is that each detonation will produce multiple fractures without damaging the wellbore. To date, we have collected six full data sets with approximately 30k source-receiver pairs each for the purposes of high-resolution cross borehole seismic tomographic imaging. The first set of data serves as the baseline measurement (i.e. un-stimulated), three sets evaluate material changes after fracture emplacement and/or enhancement, and two sets are used for evaluation of pick error and seismic velocity changes attributable to changing environmental factors (i.e. saturation due to rain/snowfall in the shallow subsurface). Each of the six datasets has been evaluated for data quality and first arrivals have been picked on nearly 200k waveforms in the target area. Each set of data is then inverted using a Vidale-Hole finite-difference 3-D eikonal solver in two ways: 1) allowing for iterative ray tracing and 2) with fixed ray paths determined from the test performed before the fracture stimulation of interest. Utilizing these two methods allows us to compare and contrast the results from two commonly used change detection techniques. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Knox, Hunter Anne AU - Grubelich, Mark C AU - Preston, Leiph A AU - Knox, James M AU - King, Dennis K AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51M EP - 1573 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310543?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Imaging+fracture+networks+using+angled+crosshole+seismic+logging+and+change+detection+techniques&rft.au=Knox%2C+Hunter+Anne%3BGrubelich%2C+Mark+C%3BPreston%2C+Leiph+A%3BKnox%2C+James+M%3BKing%2C+Dennis+K%3BAnonymous&rft.aulast=Knox&rft.aufirst=Hunter&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - The DOE subsurface (SubTER) initiative; revolutionizing responsible use of the subsurface for energy production and storage AN - 1849310478; 2016-109393 AB - The subsurface supplies more than 80% of the U.S.'s total energy needs through geothermal and hydrocarbon strategies and also provides vast potential for safe storage of CO (sub 2) and disposal of nuclear waste. Responsible and efficient use of the subsurface poses many challenges, many of which require the capability to monitor and manipulate sub-surface stress, fractures, and fluid flow at all scales. Adaptive control of subsurface fractures and flow is a multi-disciplinary challenge that, if achieved, has the potential to transform all subsurface energy strategies. As part of the U.S. Department of Energy's SubTER (Subsurface Technology and Engineering Research development and demonstration) initiative, a multi-National Laboratory team is developing next-generation approaches that will allow for adaptive control of subsurface fractures and flow. SubTER has identified an initial suite of technical thrust areas to focus work, and has initiated a number of small projects. This presentation will describe early progress associated with the SubTER technical topic areas of wellbore integrity, subsurface stress and induced seismicity, permeability manipulation and new subsurface signals. It will also describe SubTER plans, and provide a venue to solicit suggestions and discuss potential partnerships associated with future research directions. JF - American Geophysical Union Fall Meeting AU - Hubbard, Susan S AU - Walck, Marianne C AU - Blankenship, Doug AU - Bonneville, Alain AU - Bromhal, Grant S AU - Daley, Thomas M AU - Pawar, Rajesh AU - Polsky, Yarom AU - Mattson, Earl AU - Mellors, Roberts J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H51M EP - 1561 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849310478?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+DOE+subsurface+%28SubTER%29+initiative%3B+revolutionizing+responsible+use+of+the+subsurface+for+energy+production+and+storage&rft.au=Hubbard%2C+Susan+S%3BWalck%2C+Marianne+C%3BBlankenship%2C+Doug%3BBonneville%2C+Alain%3BBromhal%2C+Grant+S%3BDaley%2C+Thomas+M%3BPawar%2C+Rajesh%3BPolsky%2C+Yarom%3BMattson%2C+Earl%3BMellors%2C+Roberts+J%3BAnonymous&rft.aulast=Hubbard&rft.aufirst=Susan&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Bayesian inversion using physics-based models applied to dome extrusion at Mount St. Helens 2004-2008 AN - 1849306839; 2016-110112 AB - Physics-based models of volcanic eruptions have grown more sophisticated over the past few decades. These models, combined with Bayesian inversion, offer the potential of integrating diverse geological and geophysical datasets to better understand volcanic systems. Using a Markov Chain Monte Carlo (MCMC) algorithm with a physics-based conduit model, we invert data from the 2004-2008 dome-forming eruption at Mount St. Helens, USA. We extend the 1D cylindrical conduit model of Anderson and Segall [2011] to include vertical and lateral gas loss from the magma, as well as equilibrium crystallization. The melt viscosity increases strongly with crystal content. Magma permeability obeys the Kozeny-Carman law with a threshold porosity. Excess pressure in the magma chamber drives Newtonian flow of magma upwards until the viscous resistance to flow exceeds the rate-dependent frictional strength on the conduit wall, at which point the magma transitions from viscous flow to plug flow. We investigate the steady-state solutions for lava dome growth between March and December 2005, in which magma chamber pressure, initial water content, permeability and friction parameters are unknown model parameters. These parameters are constrained by: dome rock porosity, extrusion rate from photogrammetry, plug depth from drumbeat earthquakes, and crystallization pressure from petrologic studies. Posterior probability density functions (PDFs) reveal the constraints on the model parameters and their correlations. Assuming lithostatic normal stress on the plug, low coefficients of friction (0.1-0.3) are required to allow extrusion at the observed rate while maintaining reasonable magma chamber pressures. Lower effective normal stress or melt viscosity could allow for larger friction coefficients. Future work will investigate the time-dependent system, thereby allowing us to incorporate time-evolving geodetic and eruption rate data into the inversion. JF - American Geophysical Union Fall Meeting AU - Wong, Ying Qi AU - Segall, Paul AU - Anderson, K R AU - Bradley, A M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract V22B EP - 02 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849306839?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Bayesian+inversion+using+physics-based+models+applied+to+dome+extrusion+at+Mount+St.+Helens+2004-2008&rft.au=Wong%2C+Ying+Qi%3BSegall%2C+Paul%3BAnderson%2C+K+R%3BBradley%2C+A+M%3BAnonymous&rft.aulast=Wong&rft.aufirst=Ying&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - A perspective on diagenetic geometries and patterns of iron oxide cement and coloration; understanding challenges and complexities AN - 1849300040; 2016-106250 AB - Diagenetic records of fluid flow are underutilized proxies of water and environmental conditions in sedimentary rocks on Earth as well as Mars. The terrestrial iron-oxide records can be highly varied from faint wisps of coloration, to heavily cemented masses and layers. Other than vein cements, concretionary forms are some of the most prominent, yet enigmatic records. Concretions can have various mineral cement compositions with sizes that can span three orders of magnitude from mm, to cm, and m scales, in remarkably consistent, common spheroidal forms. Concretion geometries and banding may indicate directions and timings of fluid flow and precipitation, but deciphering the origins can be difficult with limited analytical tools. Definite complexities are the possibilities of: 1) overprinted events in an open system; 2) the role of organics in the nucleation and precipitation of authigenic minerals; and 3) multiple fluids, pathways, or processes that may produce similar-looking end products. In near-surface environments, likely any water since the Proterozoic has contained microbial life, and thus it seems highly probable that microbes play a significant role in the precipitation of diagenetic minerals due to the interactions of the biosphere and geosphere. However, recognition of ancient biosignatures that may have poor preservation potential remains a challenge. Iron oxides are particularly common, valuable indicators of near-surface iron cycling and are recognizable because the visual coloration. Our recent studies in Jurassic sandstones indicate preserved records of fingering at the interface of two immiscible fluids. The integration of geochemical self-organization models and field data provides new insights to understanding diagenetic fluid compositions, their relative densities, and flow direction flux and movement. These studies can have valuable implications and applications for understanding past fluid flow history, and reservoir characterization for CO2, hydrocarbon, and water. JF - American Geophysical Union Fall Meeting AU - Chan, Marjorie A AU - Wang, Yifeng AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract V51H EP - 01 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849300040?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+perspective+on+diagenetic+geometries+and+patterns+of+iron+oxide+cement+and+coloration%3B+understanding+challenges+and+complexities&rft.au=Chan%2C+Marjorie+A%3BWang%2C+Yifeng%3BAnonymous&rft.aulast=Chan&rft.aufirst=Marjorie&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Mini-RF and Arecibo observatory bistatic observations of the Moon AN - 1849298241; 2016-105904 AB - The Mini-RF instrument aboard NASA's Lunar Reconnaissance Orbiter (LRO) is a hybrid dual-polarized synthetic aperture radar (SAR) and has been operating in concert with the Arecibo Observatory since 2012 to collect bistatic radar data of the Moon. Approximately 28 bistatic observations, covering a variety of terrains on the lunar nearside, have been made using this mode of operation. Laboratory data and analog experiments, at optical wavelengths, have shown that the scattering properties of lunar materials (e.g., the roughness) can be sensitive to variations in bistatic angle. This sensitivity manifests as an opposition effect and likely involves contributions from shadow hiding at low angles and coherent backscatter near 0 degrees . Analog experiments and theoretical work have shown that water ice is also sensitive to variations in bistatic angle. Differences in the character of the opposition response of these materials offer an opportunity to differentiate between them, an issue that has been problematic for previous radar studies of the Moon. Observations that include mare materials, highland materials, and pyroclastic deposits have not shown an opposition response over for bistatic angles of approximately 0.1 degrees to 30 degrees . Observations of the ejecta blankets of young, fresh craters have shown an opposition response for the same range of bistatic angles. The character of the response varies for each crater and is likely related to differences in target properties of the surface and exposure age of the blanket. Observations of portions of the floor of the south polar crater Cabeus have also been acquired for the same range of bistatic angles. The character of the radar response from the crater, as a function of bistatic angle, appears unique with respect to all other lunar terrains observed. JF - American Geophysical Union Fall Meeting AU - Patterson, Gerald AU - Bussey, Ben AU - Stickle, Angela M AU - Turner, F Scott AU - Jensen, J R AU - Nolan, Michael C AU - Yocky, David A AU - Wahl, D E AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract P53G EP - 06 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849298241?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Mini-RF+and+Arecibo+observatory+bistatic+observations+of+the+Moon&rft.au=Patterson%2C+Gerald%3BBussey%2C+Ben%3BStickle%2C+Angela+M%3BTurner%2C+F+Scott%3BJensen%2C+J+R%3BNolan%2C+Michael+C%3BYocky%2C+David+A%3BWahl%2C+D+E%3BAnonymous&rft.aulast=Patterson&rft.aufirst=Gerald&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Asteroid airbursts; risk assessment and reduction AN - 1844922450; 2016-100967 AB - Airbursts are events in which small (meters to tens-of-meters in diameter) asteroids deposit most of their energy in the atmosphere with a total energy greater than small nuclear explosions (> 0.1 kilotons of TNT). The airburst risk is higher than previous assessments for two reasons. First, they are more frequent than previously thought. The Tunguska-class ( approximately 40 meters) population estimate has doubled, and Chelyabinsk-class ( approximately 20 meters) has increased by a factor of 2.6. Second, asteroid airbursts are significantly more damaging than previously assumed. In most cases, they more efficiently couple energy to the surface than nuclear explosions of the same yield. Past Near-Earth Object (NEO) risk assessments concluded that the largest asteroids (> 1 km) dominated the hazard. Large NEOs represent only a tiny fraction of the population but the potential for global catastrophe means that the contribution from low-probability, high-consequence events is large. Nearly 90% of these objects, none of which is on a collision course, have been catalogued. This has reduced their assessed near-term statistical risk by more than an order of magnitude because completion is highest for the largest and most dangerous. The relative risk from small objects would therefore be increasing even if their absolute assessed risk were not. Uncertainty in the number of small NEOs remains large and can only be reduced by expanded surveys. One strategy would be to count small NEOs making close passes in statistically significant numbers. For example, there are about 25 times as many objects of a given size that pass within the distance of geosynchronous orbit than collide with the earth, and 2000 times as many pass within a lunar distance (accounting for gravitational focusing). An asteroid the size of the Chelyabinsk impactor ( approximately 20 m) could potentially be observed within geosynchronous orbit every two years and within lunar orbit nearly once a week. A Tunguska-sized asteroid ( approximately 40 m) passes within a lunar distance several times a year. A survey optimized to discover and count these objects would rapidly reduce the uncertainty in their populations. An additional benefit would be early warning of an imminent impact to give authorities time to issue evacuation or take-cover instructions in circumstances for which there would be no time the prevent an impact. JF - American Geophysical Union Fall Meeting AU - Boslough, Mark AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract PA42B EP - 05 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1844922450?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Asteroid+airbursts%3B+risk+assessment+and+reduction&rft.au=Boslough%2C+Mark%3BAnonymous&rft.aulast=Boslough&rft.aufirst=Mark&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Infrasound monitoring of natural hazards AN - 1844920737; 2016-100821 AB - Infrasound is generated by a wide variety of energetic natural and anthropogenic phenomena that originate in the solid earth, ocean, and atmosphere. Because the absorption of infrasound is low, it can propagate long distances through atmospheric waveguides, making it a valuable tool for remote monitoring of hazards. Advances in using infrasound for monitoring energetic events in the solid earth, oceans, and atmosphere are being driven by the wealth of new datasets in addition to advances in modeling source and propagation physics. This presentation provides an overview of recent advances in infrasound monitoring of natural hazards, focusing on selected hazards in the earth (earthquakes and volcanoes), ocean (tsunamis), and atmosphere (meteoroids). JF - American Geophysical Union Fall Meeting AU - Arrowsmith, Stephen AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NH32C EP - 03 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1844920737?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Infrasound+monitoring+of+natural+hazards&rft.au=Arrowsmith%2C+Stephen%3BAnonymous&rft.aulast=Arrowsmith&rft.aufirst=Stephen&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Adaptive self-tuning networks AN - 1844920560; 2016-100779 AB - The quality of automatic detections from seismic sensor networks depends on a large number of data processing parameters that interact in complex ways. The largely manual process of identifying effective parameters is painstaking and does not guarantee that the resulting controls are the optimal configuration settings. Yet, achieving superior automatic detection of seismic events is closely related to these parameters. We present an automated sensor tuning (AST) system that learns near-optimal parameter settings for each event type using neuro-dynamic programming (reinforcement learning) trained with historic data. AST learns to test the raw signal against all event-settings and automatically self-tunes to an emerging event in real-time. The overall goal is to reduce the number of missed legitimate event detections and the number of false event detections. Reducing false alarms early in the seismic pipeline processing will have a significant impact on this goal. Applicable both for existing sensor performance boosting and new sensor deployment, this system provides an important new method to automatically tune complex remote sensing systems. Systems tuned in this way will achieve better performance than is currently possible by manual tuning, and with much less time and effort devoted to the tuning process. With ground truth on detections in seismic waveforms from a network of stations, we show that AST increases the probability of detection while decreasing false alarms. JF - American Geophysical Union Fall Meeting AU - Knox, H A AU - Draelos, T AU - Young, C J AU - Lawry, B AU - Chael, E P AU - Faust, A AU - Peterson, M G AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract IN51A EP - 1782 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1844920560?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Adaptive+self-tuning+networks&rft.au=Knox%2C+H+A%3BDraelos%2C+T%3BYoung%2C+C+J%3BLawry%2C+B%3BChael%2C+E+P%3BFaust%2C+A%3BPeterson%2C+M+G%3BAnonymous&rft.aulast=Knox&rft.aufirst=H&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Derivation of Pitzer interaction parameters for an aqueous species pair of sodium and iron(II)-citrate complex AN - 1844920523; 2016-101058 AB - The U.S. DOE Waste Isolation Pilot Plant (WIPP) is a deep underground repository for the permanent disposal of transuranic (TRU) radioactive waste. The WIPP is located in the Permian Delaware Basin near Carlsbad, New Mexico, U.S.A. The TRU waste includes, but is not limited to, iron-based alloys and the complexing agent, citric acid. Iron is also present from the steel used in the waste containers. The objective of this analysis is to derive the Pitzer activity coefficients for the pair of Na (super +) and FeCit (super -) complex to expand current WIPP thermodynamic database. An aqueous model for the dissolution of Fe(OH) (sub 2) (s) in a Na (sub 3) Cit solution was fitted to the experimentally measured solubility data. The aqueous model consists of several chemical reactions and related Pitzer interaction parameters. Specifically, Pitzer interaction parameters for the Na (super +) and FeCit (super -) pair (beta (super (0)) , beta (super (1)) , and C (super phi ) ) plus the stability constant for species of FeCit (super -) were fitted to the experimental data. Anoxic gloveboxes were used to keep the oxygen level low (<1 ppm) throughout the experiments due to redox sensitivity. EQ3NR, a computer program for geochemical aqueous speciation-solubility calculations, packaged in EQ3/6 v.8.0a, calculates the aqueous speciation and saturation index using an aqueous model addressed in EQ3/6's database. The saturation index indicates how far the system is from equilibrium with respect to the solid of interest. Thus, the smaller the sum of squared saturation indices that the aqueous model calculates for the given number of experiments, the more closely the model attributes equilibrium to each individual experiment with respect to the solid of interest. The calculation of aqueous speciation and saturation indices was repeated by adjusting stability constant of FeCit (super -) , beta (super (0)) , beta (super (1)) , and C (super phi ) in the database until the values are found that make the sum of squared saturation indices the smallest for the given number of experiments. Results will be presented at the time of conference. JF - American Geophysical Union Fall Meeting AU - Jang, Je-Hun AU - Nemer, Martin AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract V23B EP - 3157 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1844920523?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Derivation+of+Pitzer+interaction+parameters+for+an+aqueous+species+pair+of+sodium+and+iron%28II%29-citrate+complex&rft.au=Jang%2C+Je-Hun%3BNemer%2C+Martin%3BAnonymous&rft.aulast=Jang&rft.aufirst=Je-Hun&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-12-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - A scalable multi-chain Markov chain Monte Carlo method for inverting subsurface hydraulic and geological properties AN - 1840621915; 2016-098393 AB - We developed a novel scalable multi-chain Markov chain Monte Carlo (MCMC) method for high-dimensional inverse problems. The method is scalable in terms of number of chains and processors, and is useful for Bayesian calibration of computationally expensive simulators typically used for scientific and engineering calculations. In this study, we demonstrate two applications of this method for hydraulic and geological inverse problems. The first one is monitoring soil moisture variations using tomographic ground penetrating radar (GPR) travel time data, where challenges exist in the inversion of GPR tomographic data for handling non-uniqueness and nonlinearity and high-dimensionality of unknowns. We integrated the multi-chain MCMC framework with the pilot point concept, a curved-ray GPR forward model, and a sequential Gaussian simulation (SGSIM) algorithm for estimating the dielectric permittivity at pilot point locations distributed within the tomogram, as well as its spatial correlation range, which are used to construct the whole field of dielectric permittivity using SGSIM. The second application is reservoir porosity and saturation estimation using the multi-chain MCMC approach to jointly invert marine seismic amplitude versus angle (AVA) and controlled-source electro-magnetic (CSEM) data for a layered reservoir model, where the unknowns to be estimated include the porosity and fluid saturation in each reservoir layer and the electrical conductivity of the overburden and bedrock. The computational efficiency, accuracy, and convergence behaviors of the inversion approach are systematically evaluated. JF - American Geophysical Union Fall Meeting AU - Bao, Jie AU - Ren, Huiying AU - Hou, Zhangshuan AU - Ray, Jaideep AU - Swiler, Laura AU - Huang, Maoyi AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NS34A EP - 07 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840621915?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+scalable+multi-chain+Markov+chain+Monte+Carlo+method+for+inverting+subsurface+hydraulic+and+geological+properties&rft.au=Bao%2C+Jie%3BRen%2C+Huiying%3BHou%2C+Zhangshuan%3BRay%2C+Jaideep%3BSwiler%2C+Laura%3BHuang%2C+Maoyi%3BAnonymous&rft.aulast=Bao&rft.aufirst=Jie&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Imaging a vertical shaft from a tunnel using muons AN - 1840621680; 2016-096068 AB - We use muon technology to image a vertical shaft from a tunnel. The density of the materials through which cosmic ray muons pass influences the flux of muons because muons are more attenuated by higher density material. Additionally, muons can travel several kilometers allowing measurements through deep rock. Density maps are generated from muon flux measurements to locate subsurface features like tunnel structures and ore bodies. Additionally, muon data can be jointly inverted with other data such as gravity and seismic to produce higher quality earth models than produced from a single method. We collected several weeks of data in a tunnel to image a vertical shaft. The minimum length of rock between the vertical shaft and the detector is 120 meters and the diameter of the vertical shaft is 4.6 meters. The rock the muons traveled through consists of Tertiary age volcanic tuff and steeply dipping, small-displacement faults. Results will be presented for muon flux in the tunnel and Monte-Carlo simulations of this experiment. Simulations from both GEANT4 (Geometry And Tracking version 4) and MCNP6 (Monte-Carlo N-Particle version 6) models will be compared. The tunnel overburden from muon measurements is also estimated and compared with actual the overburden. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Bonal, Nedra AU - Preston, Leiph A AU - Dorsey, Daniel J AU - Schwellenbach, Dave AU - Green, Andrew AU - Smalley, Duane AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NS21B EP - 1924 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840621680?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Imaging+a+vertical+shaft+from+a+tunnel+using+muons&rft.au=Bonal%2C+Nedra%3BPreston%2C+Leiph+A%3BDorsey%2C+Daniel+J%3BSchwellenbach%2C+Dave%3BGreen%2C+Andrew%3BSmalley%2C+Duane%3BAnonymous&rft.aulast=Bonal&rft.aufirst=Nedra&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Electromagnetic measurements in an active oilfield environment AN - 1840620902; 2016-096116 AB - An important issue in oilfield development pertains to mapping and monitoring of the fracture distributions (either natural or man-made) controlling subsurface fluid flow. Although microseismic monitoring and analysis have been used for this purpose for several decades, there remain several ambiguities and uncertainties with this approach. We are investigating a novel electromagnetic (EM) technique for detecting and mapping hydraulic fractures in a petroleum reservoir by injecting an electrically conductive contrast agent into an open fracture. The fracture is subsequently illuminated by a strong EM field radiated by a large engineered antenna. Specifically, a grounded electric current source is applied directly to the steel casing of the borehole, either at/near the wellhead or at a deep downhole point. Transient multicomponent EM signals (both electric and magnetic) scattered by the conductivity contrast are then recorded by a surface receiver array. We are presently utilizing advanced 3D numerical modeling algorithms to accurately simulate fracture responses, both before and after insertion of the conductive contrast agent. Model results compare favorably with EM field data recently acquired in a Permian Basin oilfield. However, extraction of the very-low-amplitude fracture signatures from noisy data requires effective noise suppression strategies such as long stacking times, rejection of outliers, and careful treatment of natural magnetotelluric fields. Dealing with the ever-present "episodic EM noise" typical in an active oilfield environment (associated with drilling, pumping, machinery, traffic, etc.) constitutes an ongoing problem. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the US Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Schramm, Kimberly A AU - Aldridge, David F AU - Bartel, Lewis C AU - Knox, Hunter Anne AU - Weiss, Chester J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NS31A EP - 1952 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840620902?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Electromagnetic+measurements+in+an+active+oilfield+environment&rft.au=Schramm%2C+Kimberly+A%3BAldridge%2C+David+F%3BBartel%2C+Lewis+C%3BKnox%2C+Hunter+Anne%3BWeiss%2C+Chester+J%3BAnonymous&rft.aulast=Schramm&rft.aufirst=Kimberly&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Measuring changes in electrical conductivity of fractures from DC resistivity data in an active oilfield environment; a model study for surface-based data AN - 1840620425; 2016-096117 AB - Presented here are preliminary results of a numerical modeling study on the feasibility of using DC resistivity data to make useful inferences on depth, size and orientation of subsurface fracture systems in an active oilfield environment. Specifically, we consider an experiment where the steel-cased borehole (consisting of a shallow, vertical section and deep, horizontal section) is one electrode of the DC source, with the other source electrode grounded at the Air/Earth interface some distance away. For simplicity, the fractures are modeled as short sequence of vertical sheets intersecting the horizontal section of the well casing. Finite element analysis of this system shows that as fracture conductivity is elevated, two effects (at least) are observed: a local perturbation in the electric potential in the vicinity of the fracture set, with limited far-field expression; and, an overall change in the electric potential of the entire borehole casing due to current leakage at the site of the fractures. Under ideal conditions, our results suggest that far-field, time-lapse measurements of DC potentials surrounding a borehole casing can be reliably interpreted by simple, linear inversion for a Coulomb charge distribution along the borehole path, including a local charge perturbation due to the fractures. In contrast to regularized, nonlinear 3D inversion of broadband EM or DC data, this approach offers an inexpensive method for detecting and monitoring the time-evolution of electrically conducting fractures while ultimately providing an estimate of their effective conductivity--the latter providing an important measure independent of seismic methods on fracture shape, size, and hydraulic connectivity. JF - American Geophysical Union Fall Meeting AU - Weiss, Chester J AU - Aldridge, David F AU - Knox, Hunter Anne AU - Schramm, Kimberly A AU - Bartel, Lewis C AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NS31A EP - 1953 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1840620425?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Measuring+changes+in+electrical+conductivity+of+fractures+from+DC+resistivity+data+in+an+active+oilfield+environment%3B+a+model+study+for+surface-based+data&rft.au=Weiss%2C+Chester+J%3BAldridge%2C+David+F%3BKnox%2C+Hunter+Anne%3BSchramm%2C+Kimberly+A%3BBartel%2C+Lewis+C%3BAnonymous&rft.aulast=Weiss&rft.aufirst=Chester&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-11-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Can plume-forming asteroid airbursts generate meteotsunami in deep water? AN - 1832728673; 2016-089398 AB - Hydrocode simulations suggest that the 1908 Tunguska explosion was a plume-forming airburst analogous to those caused by Comet Shoemaker-Levy 9 (SL9) collisions with Jupiter in 1994. A noctilucent cloud that appeared over Europe following the Tunguska event is similar to post-impact features on Jupiter, consistent with a collapsed plume containing condensation from the vaporized asteroid. Previous workers treated Tunguska as a point explosion and used seismic records, barograms, and extent of fallen trees to determine explosive yield. Estimates were based on scaling laws derived from nuclear weapons data, neglecting directionality, mass, and momentum of the asteroid. This point-source assumption, with other simplifications, led to a significant overestimate. Tunguska seismic data were consistent with ground motion from a vertical point impulse of 7 X 10 (super 18) dyn sec caused by the downward blast wave of a 12.5-megaton nuclear explosion at an altitude of 8.5 km for an effective momentum multiplication factor (beta ) of approximately 80. However, simulations of a 3-megaton collisional airburst reveal that the upward-directed momentum contained in a ballistic plume can reach this level within the first minute after the explosion (beta nearly equal 300). The reaction impulse from such an airburst is therefore similar to a much larger non-plume-forming nuclear explosion. Momentum is coupled through the atmosphere to the surface, generating disproportionately large seismic signatures. This result suggests that coupling from an over-water plume-forming airburst could be a more efficient tsunami source mechanism than a collapsing impact cavity or direct air blast because the characteristic time of the plume is closer to that of a long-period wave in deep water. As the plume accelerates upward, it creates a slowly-rising and sustained overpressure with a ramp wave that propagates outward at the speed of sound, generating a tsunami in deep ocean by the same mechanism that yields slower meteotsunami in shallow basins. This hypothesis is consistent with the observation of prominent internal waves observed propagating radially outward from several SL9 impacts, even though the waves were not in Proudman resonance. Because of slow compression, the SL9 waves grew with a Froude number of approximately 1.6, the same as that of the sound speed in air over approximately 4.6-km-deep water. JF - American Geophysical Union Fall Meeting AU - Boslough, Mark AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NH11A EP - 1884 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832728673?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Can+plume-forming+asteroid+airbursts+generate+meteotsunami+in+deep+water%3F&rft.au=Boslough%2C+Mark%3BAnonymous&rft.aulast=Boslough&rft.aufirst=Mark&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Characterizing 3-D flow velocity in evolving pore networks driven by CaCO (sub 3) precipitation and dissolution AN - 1832723212; 2016-092004 AB - Understanding reactive flow in geomaterials is important for optimizing geologic carbon storage practices, such as using pore space efficiently. Flow paths can be complex in large degrees of geologic heterogeneities across scales. In addition, local heterogeneity can evolve as reactive transport processes alter the pore-scale morphology. For example, dissolved carbon dioxide may react with minerals in fractured rocks, confined aquifers, or faults, resulting in heterogeneous cementation (and/or dissolution) and evolving flow conditions. Both path and flow complexities are important and poorly characterized, making it difficult to determine their evolution with traditional 2-D transport models. Here we characterize the development of 3-D pore-scale flow with an evolving pore configuration due to calcium carbonate (CaCO (sub 3) ) precipitation and dissolution. A simple pattern of a microfluidic pore network is used initially and pore structures will become more complex due to precipitation and dissolution processes. At several stages of precipitation and dissolution, we directly visualize 3-D velocity vectors using micro particle image velocimetry and a laser scanning confocal microscope. Measured 3-D velocity vectors are then compared to 3-D simulated flow fields which will be used to simulate reactive transport. Our findings will highlight the importance of the 3-D flow dynamics and its impact on estimating reactive surface area over time. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. This material is based upon work supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. JF - American Geophysical Union Fall Meeting AU - Chojnicki, K N AU - Yoon, H AU - Martinez, M J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H41C EP - 1314 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832723212?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Characterizing+3-D+flow+velocity+in+evolving+pore+networks+driven+by+CaCO+%28sub+3%29+precipitation+and+dissolution&rft.au=Chojnicki%2C+K+N%3BYoon%2C+H%3BMartinez%2C+M+J%3BAnonymous&rft.aulast=Chojnicki&rft.aufirst=K&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Detection of potential leakage pathways from geological carbon storage by fluid pressure data assimilation AN - 1832594704; 771775-10 AB - One of the main concerns of geological carbon storage (GCS) systems is the risk of leakage through "weak" permeable areas of the sealing formation or caprock. Since the fluid pressure pulse travels faster than the carbon dioxide (CO (sub 2) ) plume across the storage reservoir, the fluid overpressure transmitted into overlying permeable formations through caprock discontinuities is potentially detectable sooner than actual CO (sub 2) leakage occurs. In this work, an inverse modeling method based on fluid pressure measurements collected in strata above the target CO (sub 2) storage formation is proposed, which aims at identifying the presence, the location, and the extent of possible leakage pathways through the caprock. We combine a three-dimensional subsurface multiphase flow model with ensemble-based data assimilation algorithms to recognize potential caprock discontinuities that could undermine the long-term safety of GCS. The goal of this work is to examine and compare the capabilities of data assimilation algorithms such as the ensemble smoother (ES) and the restart ensemble Kalman filter (REnKF) to detect the presence of brine and/or CO (sub 2) leakage pathways, potentially in real-time during GCS operations. For the purpose of this study, changes in fluid pressure in the brine aquifer overlying to CO (sub 2) storage formation aquifer are hypothetically observed in monitoring boreholes, or provided by time-lapse seismic surveys. Caprock discontinuities are typically characterized locally by higher values of permeability, so that the permeability distribution tends to fit to a non-Gaussian bimodal process, which hardly complies with the requirements of the ES and REnKF algorithms. Here, issues related to the non-Gaussianity of the caprock permeability field are investigated by developing and applying a normal score transform procedure. Results suggest that the REnKF is more effective than the ES in characterizing caprock discontinuities. Abstract Copyright (2015) Elsevier, B.V. JF - Advances in Water Resources AU - Gonzalez-Nicolas, Ana AU - Bau, Domenico AU - Alzraiee, Ayman Y1 - 2015/12// PY - 2015 DA - December 2015 SP - 366 EP - 384 PB - Elsevier, Oxford VL - 86 IS - Part B SN - 0309-1708, 0309-1708 KW - detection KW - carbon sequestration KW - fluid pressure KW - multiphase flow KW - Kalman filters KW - data assimilation KW - algorithms KW - transformations KW - seepage KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832594704?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=Detection+of+potential+leakage+pathways+from+geological+carbon+storage+by+fluid+pressure+data+assimilation&rft.au=Gonzalez-Nicolas%2C+Ana%3BBau%2C+Domenico%3BAlzraiee%2C+Ayman&rft.aulast=Gonzalez-Nicolas&rft.aufirst=Ana&rft.date=2015-12-01&rft.volume=86&rft.issue=Part+B&rft.spage=366&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/10.1016%2Fj.advwatres.2015.10.006 L2 - http://www.sciencedirect.com/science/journal/03091708 LA - English DB - GeoRef N1 - Conference title - 20th International Conference on Computational methods in water resources N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Number of references - 69 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - algorithms; carbon sequestration; data assimilation; detection; fluid pressure; Kalman filters; multiphase flow; seepage; transformations DO - http://dx.doi.org/10.1016/j.advwatres.2015.10.006 ER - TY - JOUR T1 - Multi-fidelity surrogates of groundwater flow AN - 1828849974; 2016-086505 AB - In order to support decision making under uncertainty, models must provide detailed predictions in a timely manner. While highly parametrized models allow a gamut of data and processes to be incorporated at fine temporal and spatial scales, their slow runtimes inhibit their use in optimization, uncertainty analysis, integrated modelling, and decision support. Surrogate modelling attempts to reproduce the relevant behaviour of a complex mode, at a fraction of the computational cost. Data-driven surrogate methods (e.g. Radial Basis Functions) have shown promise in replicating a relatively small number of input-output relationships. However, they are not suited to models with hundreds of inputs or outputs. Other drawbacks of data-driven methods include poor performance away from runs used to calibrate the surrogate. Hierarchical (e.g. Multigrid) and Projection (e.g. Proper Orthogonal Decomposition) based surrogates are less prone to these drawbacks. Novel methods, such as multi-fidelity stochastic collocation, combine techniques from both Hierarchical and Projection based methods. In this work, we apply such an approach to a transient, spatially distributed groundwater flow model. While the surrogate runtime is orders of magnitude lower than the original model, it reproduces the hundreds of values necessary to characterize spatially and temporally varying outputs. The surrogate allows uncertainty in aquifer properties to be propagated to head time-series at a number of locations. JF - American Geophysical Union Fall Meeting AU - Jakeman, Anthony John AU - Asher, Michael AU - Jakeman, John AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H53D EP - 1691 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1828849974?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Multi-fidelity+surrogates+of+groundwater+flow&rft.au=Jakeman%2C+Anthony+John%3BAsher%2C+Michael%3BJakeman%2C+John%3BAnonymous&rft.aulast=Jakeman&rft.aufirst=Anthony&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Water-free shale stimulation; experimental studies of electrofracturing AN - 1824215724; 2016-082631 AB - Electrofracturing is a water-free stimulation method that might be applicable to hydrocarbon reservoirs. This method of dynamic fragmentation uses high-voltage pulses applied to rock via a pair of electrodes. Fragmentation occurs through two general processes (Cho et al., 2006): 1) electrohydraulic shock and 2) internal breakdown inside bulk solid dielectrics. In the first process, electrical current passing through brackish or salty water found naturally in the formation generates a shock wave of sufficient magnitude to crush/fail the rock as the wave travels through it. In the second process, the electric current flows through the rock preferentially along mineral interfaces; tensile and branching cracks are induced at the boundary interfaces either by heating and differential expansion, or by a shock wave induced by the electrical impulse itself. Both processes have been examined experimentally on rocks and on concrete starting in the late 1980's. In light of the "shale revolution" that has reinvigorated the North American petroleum resource base over the last decade, we developed a laboratory based experimental system to study coupled deformation and gas flow during high-voltage pulse application at elevated confining pressure (to 70 MPa). We deformed twelve samples using 6.5 mu s full width at half maximum exponential voltage pulses from 80 to 200 kV. Exponential decay loading was shown to fracture shale at pressure, producing a 5-8 order-of-magnitude increase in permeability (initiating in the nD range) with significant fracturing. Fractures were documented using CT and SEM. The preponderance of fractures are parallel to bedding with fractures often extending from end to end in the samples, which were up to 9 cm in length. The bedding-parallel fractures are adjacent to, or off centered to, the input pulse location. Fractures oblique to bedding planes are present as well, but are fewer in number. The test system, and experimental and observational methods and results will be discussed. JF - American Geophysical Union Fall Meeting AU - Bauer, Stephen J AU - Geilikman, Mikhail Boris AU - Gardner, William P AU - Broome, Scott T AU - Glover, Steve AU - Williamson, Kenneth AU - Su, Jiann AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR41C EP - 2644 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215724?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Water-free+shale+stimulation%3B+experimental+studies+of+electrofracturing&rft.au=Bauer%2C+Stephen+J%3BGeilikman%2C+Mikhail+Boris%3BGardner%2C+William+P%3BBroome%2C+Scott+T%3BGlover%2C+Steve%3BWilliamson%2C+Kenneth%3BSu%2C+Jiann%3BAnonymous&rft.aulast=Bauer&rft.aufirst=Stephen&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Molecular basis of clay mineral structure and dynamics in subsurface engineering applications AN - 1824215678; 2016-082720 AB - Clay minerals and their interfaces play an essential role in many geochemical, environmental, and subsurface engineering applications. Adsorption, dissolution, precipitation, nucleation, and growth mechanisms, in particular, are controlled by the interplay of structure, thermodynamics, kinetics, and transport at clay mineral-water interfaces. Molecular details of these processes are typically beyond the sensitivity of experimental and analytical methods, and therefore require accurate models and simulations. Also, basal surfaces and interlayers of clay minerals provide constrained interfacial environments to facilitate the evaluation of these complex processes. We have developed and used classical molecular and quantum methods to examine the complex behavior of clay mineral-water interfaces and dynamics of interlayer species. Bulk structures, swelling behavior, diffusion, and adsorption processes are evaluated and compared to experimental and spectroscopic findings. Analysis of adsorption mechanisms of radionuclides on clay minerals provides a scientific basis for predicting the suitability of engineered barriers associated with nuclear waste repositories and the fate of contaminants in the environment. Similarly, the injection of supercritical carbon dioxide into geological reservoirs-to mitigate the impact of climate change-is evaluated by molecular models of multi-fluid interactions with clay minerals. Molecular dynamics simulations provide insights into the wettability of different fluids-water, electrolyte solutions, and supercritical carbon dioxide-on clay surfaces, and which ultimately affects capillary fluid flow and the integrity of shale caprocks. JF - American Geophysical Union Fall Meeting AU - Cygan, Randall T AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR52A EP - 01 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215678?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Molecular+basis+of+clay+mineral+structure+and+dynamics+in+subsurface+engineering+applications&rft.au=Cygan%2C+Randall+T%3BAnonymous&rft.aulast=Cygan&rft.aufirst=Randall&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Multiscale imaging of carbonate rocks and representative sampling for digital rock physics AN - 1824215578; 2016-082660 AB - Geomaterials containing nano-pores (e.g., shales and carbonate rocks) have become increasingly important for emerging problems such as unconventional gas and oil resources, enhanced oil recovery, and geologic storage of CO (sub 2) . Accurate prediction of coupled geophysical and chemical processes at the pore scale requires realistic representation of pore structure and topology. This is especially true for chalk materials, where pore networks are small and complex, and require characterization at sub-micron scale. In this work, we apply laser scanning confocal microscopy with various filters to characterize pore structures and microlithofacies at a thin-section scale (micron resolution) and dual focused ion beam-scanning electron microscopy (FIB-SEM) for 3D imaging of nanometer-to-micron scale microcracks and pore distributions. With imaging techniques advanced for nano-pore characterization, it is critical to define representative sampling of FIB-SEM images and apply it to the thin-section or larger scale. In this work, several texture characterization techniques are applied for segmentation clusters represented by a couple of 3-D FIB-SEM image stacks per each cluster. Pore structure evolution is characterized based on geometric and topological properties from a set of FIB-SEM images and lattice-Boltzmann method (LBM) is used to obtain permeability at several different scales. Upscaling of permeability to the Darcy scale (e.g., the thin-section scale) with image dataset will be discussed with emphasis on understanding microfracture-matrix interaction, representative volume for FIB-SEM sampling, and multiphase flow and reactive transport. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Yoon, Hongkyu AU - Dewers, Thomas A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR41D EP - 2673 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215578?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Multiscale+imaging+of+carbonate+rocks+and+representative+sampling+for+digital+rock+physics&rft.au=Yoon%2C+Hongkyu%3BDewers%2C+Thomas+A%3BAnonymous&rft.aulast=Yoon&rft.aufirst=Hongkyu&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Characterization of heat-treated clay minerals in the context of nuclear waste disposal AN - 1824215525; 2016-082638 AB - Clay minerals are likely candidates to aid in nuclear waste isolation due to their low permeability, favorable swelling properties, and high cation sorption capacities. Establishing the thermal limit for clay minerals in a nuclear waste repository is a potentially important component of repository design, as flexibility of the heat load within the repository can have a major impact on the selection of repository design. For example, the thermal limit plays a critical role in the time that waste packages would need to cool before being transferred to the repository. Understanding the chemical and physical changes, if any, that occur in clay minerals at various temperatures above the current thermal limit (of 100 degrees C) can enable decision-makers with information critical to evaluating the potential trade-offs of increasing the thermal limit within the repository. Most critical is gaining understanding of how varying thermal conditions in the repository will impact radionuclide sorption and transport in clay materials either as engineered barriers or as disposal media. A variety of repository-relevant clay minerals (illite, mixed layer illite/smectite, and montmorillonite), were heated for a range of temperatures between 100-1000 degrees C. These samples were characterized to determine surface area, mineralogical alteration, and cation exchange capacity (CEC). Our results show that for conditions up to 500 degrees C, no significant change occurs, so long as the clay mineral remains mineralogically intact. At temperatures above 500 degrees C, transformation of the layered silicates into silica phases leads to alteration that impacts important clay characteristics. JF - American Geophysical Union Fall Meeting AU - Matteo, Edward N AU - Wang, Yifeng AU - Kruichak, Jessica Nicole AU - Mills, Melissa Marie AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR41C EP - 2651 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215525?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Characterization+of+heat-treated+clay+minerals+in+the+context+of+nuclear+waste+disposal&rft.au=Matteo%2C+Edward+N%3BWang%2C+Yifeng%3BKruichak%2C+Jessica+Nicole%3BMills%2C+Melissa+Marie%3BAnonymous&rft.aulast=Matteo&rft.aufirst=Edward&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Alteration of Mancos Shale by synthetic hydrofracturing fluid AN - 1824215517; 2016-082636 AB - Shale gas produced through hydrofracturing has changed the energy perspective in the United States. Shale gas extraction is complicated by the fast decline in wellbore production, to mitigate which re-stimulation and drilling new wells are required. Our goal is to conduct laboratory experiments that examine methane transport from low-permeability matrices to fracture networks induced by hydraulic fracturing. In particular, we address whether mineralogical alteration of shale by hydrofracturing fluids has an effect on matrix-to-fracture methane transport. We performed a set of laboratory experiments addressing the alteration of Mancos shale by synthetic hydrofracturing fluid at hydrothermal conditions (90 degrees C). Both powdered shale and shale chips were investigated. Solid characterization was done using bulk and micro-X-ray diffraction (XRD, mu XRD), and micro-X-ray Fluorescence mapping (mu XRF). Analysis of the aqueous samples was done using ion chromatography (IC) for major anions and cations and inductively coupled plasma mass spectrometry (ICP-MS)--for trace metals. Our results indicate that calcium, barium, strontium, magnesium, manganese, silica, sodium, chloride and sulfate were released from Mancos shale after reaction with hydrofracturing fluid. Altered zones on shale surface after 2 months of reaction are thin--likely, within a few microns. The XRD patterns normalized to the 100% peak for quartz indicate that the dolomite, calcite, biotite, and kaolinite peaks decrease in intensity relative to the quartz peaks with increased alteration time, indicative of the partial dissolution of these minerals. Understanding mineralogical composition of an altered layer of Mancos shale will provide insight whether methane transport through these zones will be affected compared to the unaltered material. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Kruichak, Jessica Nicole AU - Ilgen, Anastasia AU - Wang, Yifeng AU - Griego, James AU - Rodriguez, Mark AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR41C EP - 2649 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 06A:Sedimentary petrology KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215517?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Alteration+of+Mancos+Shale+by+synthetic+hydrofracturing+fluid&rft.au=Kruichak%2C+Jessica+Nicole%3BIlgen%2C+Anastasia%3BWang%2C+Yifeng%3BGriego%2C+James%3BRodriguez%2C+Mark%3BAnonymous&rft.aulast=Kruichak&rft.aufirst=Jessica&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Understanding radionuclide interactions with layered materials AN - 1824215455; 2016-082723 AB - Layered materials play an important role in nuclear waste management and environmental cleanup. Better understanding of radionuclide interactions with those materials is critical for engineering high-performance materials for various applications. This presentation will provide an overview on radionuclide interactions with two general categories of layered materials--cationic clays and anionic clays--from a perspective of nanopore confinement. Nanopores are widely present in layered materials, either as the interlayers or as inter-particle space. Nanopore confinement can significantly modify chemical reactions in those materials. This effect may cause the preferential enrichment of radionuclides in nanopores and therefore directly impact the mobility of the radionuclides. This effect also implies that conventional sorption measurements using disaggregated samples may not represent chemical conditions in actual systems. The control of material structures on ion exchange, surface complexation, and diffusion in layered materials will be systematically examined, and the related modeling approaches will be discussed. This work was performed at Sandia National Laboratories, which is a multiprogram laboratory operated by Sandia Corporation, a Lockheed-Martin Company, for the DOE under contract DE-AC04-94AL8500. JF - American Geophysical Union Fall Meeting AU - Wang, Yifeng AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR52A EP - 04 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215455?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Understanding+radionuclide+interactions+with+layered+materials&rft.au=Wang%2C+Yifeng%3BAnonymous&rft.aulast=Wang&rft.aufirst=Yifeng&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Mechanical characterization of Mancos Shale AN - 1824215395; 2016-082668 AB - A series of tests on Mancos shale have been undertaken to determine the failure surface and to characterize anisotropy. This work supports additional studies which are being performed on the same block of shale; fracture toughness, permeability, and chemical analysis. Mechanical tests are being conducted after specimens were conditioned for at least two weeks at 70% constant relative humidity conditions. Specimens are tested under drained conditions, with the constant relative humidity condition maintained on the downstream side of the specimen. The upstream is sealed. Anisotropy is determined through testing specimens that have been cored parallel and perpendicular to the bedding plane. Preliminary results show that when loaded parallel to bedding the shale is roughly 50% weaker. Test are run under constant mean stress conditions when possible (excepting indirect tension, unconfined compression, and hydrostatic). Tests are run in hydrostatic compaction to the desired mean stress, then differential stress is applied axially in displacement control to failure. The constant mean stress condition is maintained by decreasing the confining pressure by half of the increase in the axial stress. Results will be compared to typical failure criteria to investigate the effectiveness of capturing the behavior of the shale with traditional failure theory. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. SAND2015-6107 A. JF - American Geophysical Union Fall Meeting AU - Broome, Scott T AU - Ingraham, Matthew D AU - Dewers, Thomas A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR41D EP - 2681 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215395?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Mechanical+characterization+of+Mancos+Shale&rft.au=Broome%2C+Scott+T%3BIngraham%2C+Matthew+D%3BDewers%2C+Thomas+A%3BAnonymous&rft.aulast=Broome&rft.aufirst=Scott&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Multiscale multiphysics caprock seal analysis; a case study of the Farnsworth Unit, Texas, USA AN - 1824215393; 2016-082656 AB - Caprock sealing behavior depends on coupled processes that operate over a variety of length and time scales. Capillary sealing behavior depends on nanoscale pore throats and interfacial fluid properties. Larger-scale sedimentary architecture, fractures, and faults may govern properties of potential "seal-bypass" systems. We present the multiscale multiphysics investigation of sealing integrity of the caprock system that overlies the Morrow Sandstone reservoir, Farnsworth Unit, Texas. The Morrow Sandstone is the target injection unit for an on-going combined enhanced oil recovery-CO (sub 2) storage project by the Southwest Regional Partnership on Carbon Sequestration (SWP). Methods include small-to-large scale measurement techniques, including: focused ion beam-scanning electron microscopy; laser scanning confocal microscopy; electron and optical petrography; core examinations of sedimentary architecture and fractures; geomechanical testing; and a noble gas profile through sealing lithologies into the reservoir, as preserved from fresh core. The combined data set is used as part of a performance assessment methodology. The authors gratefully acknowledge the U.S. Department of Energy's (DOE) National Energy Technology Laboratory for sponsoring this project through the SWP under Award No. DE-FC26-05NT42591. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Heath, Jason E AU - Dewers, Thomas A AU - Mozley, Peter AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR41C EP - 2669 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215393?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Multiscale+multiphysics+caprock+seal+analysis%3B+a+case+study+of+the+Farnsworth+Unit%2C+Texas%2C+USA&rft.au=Heath%2C+Jason+E%3BDewers%2C+Thomas+A%3BMozley%2C+Peter%3BAnonymous&rft.aulast=Heath&rft.aufirst=Jason&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - 3D printing and digital rock physics for geomaterials AN - 1824214679; 2016-082698 AB - Imaging techniques for the analysis of porous structures have revolutionized our ability to quantitatively characterize geomaterials. Digital representations of rock from CT images and physics modeling based on these pore structures provide the opportunity to further advance our quantitative understanding of fluid flow, geomechanics, and geochemistry, and the emergence of coupled behaviors. Additive manufacturing, commonly known as 3D printing, has revolutionized production of custom parts with complex internal geometries. For the geosciences, recent advances in 3D printing technology may be co-opted to print reproducible porous structures derived from CT-imaging of actual rocks for experimental testing. The use of 3D printed microstructure allows us to surmount typical problems associated with sample-to-sample heterogeneity that plague rock physics testing and to test material response independent from pore-structure variability. Together, imaging, digital rocks and 3D printing potentially enables a new workflow for understanding coupled geophysical processes in a real, but well-defined setting circumventing typical issues associated with reproducibility, enabling full characterization and thus connection of physical phenomena to structure. In this talk we will discuss the possibilities that these technologies can bring to geosciences and present early experiences with coupled multiscale experimental and numerical analysis using 3D printed fractured rock specimens. In particular, we discuss the processes of selection and printing of transparent fractured specimens based on 3D reconstruction of micro-fractured rock to study fluid flow characterization and manipulation. Micro-particle image velocimetry is used to directly visualize 3D single and multiphase flow velocity in 3D fracture networks. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Martinez, Mario J AU - Yoon, Hongkyu AU - Dewers, Thomas A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR43A EP - 01 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824214679?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=3D+printing+and+digital+rock+physics+for+geomaterials&rft.au=Martinez%2C+Mario+J%3BYoon%2C+Hongkyu%3BDewers%2C+Thomas+A%3BAnonymous&rft.aulast=Martinez&rft.aufirst=Mario&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - The wettability of shale by CO (sub 2) and its impact on geologic CO (sub 2) sequestration AN - 1824214669; 2016-082556 AB - The geologic sequestration of CO2 is widely considered as a potential solution for decreasing anthropogenic atmospheric CO2 emissions. Wettability of fluids within reservoir materials is a critical factor in determining the efficiency of structural and residual trapping, two major mechanisms of geologic sequestration. Individual reservoir minerals are often targeted for wettability studies. Current practice applies these results, recorded under laboratory conditions, to in-situ reservoir rock; however the wide variety of measured contact angles reported in the literature calls this practice into question. To address these issues and to study the wettability of shale caprock, resedimentation techniques are employed. These techniques allow for the creation of synthetic shales with controlled, homogeneous mineralogies. In addition, the systematic variation of the mineralogy allows for the characterization of shale wettability as a function of mineralogical composition. A novel design has been developed and used to conduct wettability experiments at reservoir conditions using high resolution X-ray computer tomography. Using this technique the wettability of resedimented shales and natural shales are compared at different reservoir conditions. Next, Lattice Boltzmann modelling methods are used to simulate capillary entry pressure into a shale capillary. Adhesion parameters along the wall are tuned to the results of the synthetic shales and heterogeneity is incorporated to estimate the capillary entry pressure into a natural shale. Understanding the mineralogical components of shale wetting allows for the prediction of capillary entry pressure based on shale mineralogy which can be used to help select secure CO2 storage sites. JF - American Geophysical Union Fall Meeting AU - Guiltinan, Eric J AU - Cardenas, M B AU - Espinoza, D N AU - Yoon, H AU - Dewers, Thomas A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H44D EP - 08 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824214669?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+wettability+of+shale+by+CO+%28sub+2%29+and+its+impact+on+geologic+CO+%28sub+2%29+sequestration&rft.au=Guiltinan%2C+Eric+J%3BCardenas%2C+M+B%3BEspinoza%2C+D+N%3BYoon%2C+H%3BDewers%2C+Thomas+A%3BAnonymous&rft.aulast=Guiltinan&rft.aufirst=Eric&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Evolution of elastic moduli for high porosity sandstone under true-triaxial stress conditions AN - 1824214668; 2016-082676 AB - Accurate field-scale deformation models require use of a constitutive framework that is capable of representing material behavior, and able to be calibrated using available mechanical response data. This study focuses on the formulation of such a constitutive framework for Castlegate sandstone, a high porosity fluvial-deposited reservoir analog rock. Experimentalists report that for high porosity sandstones, accounting for the evolution of the elastic moduli with stress and plastic strain is essential to properly represent deformation response. Hence, the principles of hyperplasticity (e.g., Houlsby and Puzrin, 2006) were employed to develop a thermodynamically consistent constitutive framework for high porosity sandstone. The mechanical data set of Ingraham et al. (2013) was then used to develop a specific constitutive model for Castlegate sandstone. Through systematic analyses of stress-strain unloading data for Castlegate, it was found that the bulk modulus evolved with mean stress and plastic volume strain during the hydrostatic portion of the loading. During the subsequent deviatoric loading, the shear modulus evolved with von Mises equivalent shear stress and plastic shear strain. With this understanding, general expressions for the elastic moduli were formulated and subsequently assessed for thermodynamic consistency. Once thermodynamic consistency was confirmed, analytical and numerical techniques were applied to the mechanical data set to obtain explicit expressions and material parameters for the elastic moduli. The key outcome of this study is a thermodynamically consistent constitutive framework for high porosity sandstone which accounts for the evolution of the elastic moduli with stress and plastic strain. JF - American Geophysical Union Fall Meeting AU - Richards, Melissa C AU - Ingraham, Matthew D AU - Issen, Kathleen A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR41D EP - 2689 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824214668?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Evolution+of+elastic+moduli+for+high+porosity+sandstone+under+true-triaxial+stress+conditions&rft.au=Richards%2C+Melissa+C%3BIngraham%2C+Matthew+D%3BIssen%2C+Kathleen+A%3BAnonymous&rft.aulast=Richards&rft.aufirst=Melissa&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Spatial persistence of macropores and authigenic clays in a reservoir sandstone; implications for enhanced oil recovery and CO (sub 2) storage AN - 1824214646; 2016-082522 AB - Multiphase flow in clay-rich sandstone reservoirs is important to enhanced oil recovery (EOR) and the geologic storage of CO (sub 2) . Understanding geologic controls on pore structure allows for better identification of lithofacies that can contain, storage, and/or transmit hydrocarbons and CO (sub 2) , and may result in better designs for EOR-CO (sub 2) storage. We examine three-dimensional pore structure and connectivity of sandstone samples from the Farnsworth Unit, Texas, the site of a combined EOR-CO (sub 2) storage project by the Southwest Regional Partnership on Carbon Sequestration (SWP). We employ a unique set of methods, including: robotic serial polishing and reflected-light imaging for digital pore-structure reconstruction; electron microscopy; laser scanning confocal microscopy; mercury intrusion-extrusion porosimetry; and relative permeability and capillary pressure measurements using CO (sub 2) and synthetic formation fluid. Our results link pore size distributions, topology of porosity and clay-rich phases, and spatial persistence of connected flow paths to multiphase flow behavior. The authors gratefully acknowledge the U.S. Department of Energy's National Energy Technology Laboratory for sponsoring this project through the SWP under Award No. DE-FC26-05NT42591. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Dewers, Thomas A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H43K EP - 02 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824214646?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Spatial+persistence+of+macropores+and+authigenic+clays+in+a+reservoir+sandstone%3B+implications+for+enhanced+oil+recovery+and+CO+%28sub+2%29+storage&rft.au=Dewers%2C+Thomas+A%3BAnonymous&rft.aulast=Dewers&rft.aufirst=Thomas&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Site guidelines for a deep borehole field test AN - 1819894300; 2016-080172 AB - The US DOE Office of Nuclear Energy Used Nuclear Fuel Disposition Campaign (UFDC) is initiating a Deep Borehole Field Test (DBFT), without use of any radioactive waste, to evaluate the geoscience of the approach and technical capabilities for implementation. DOE has identified Sandia National Laboratories (SNL) as the Technical Lead for the UFDC DBFT Project, with the role of supporting DOE in (i) developing the overall DBFT Project Plan, (ii) management and integration of all DBFT Project activities, and (iii) providing Project technical guidance to DOE, other DOE National Laboratories, and university partners. The DBFT includes drilling one Characterization Borehole (CB-8.5" diameter), followed by an optional Field Test Borehole (FTB), to a depth of about 5,000 m (16,400 feet) into crystalline basement rock in a geologically stable continental location. The DBFT CB will be drilled and completed to facilitate downhole scientific testing and analyses. If site conditions are found to be favorable, DOE may drill the larger-diameter (17") FTB to facilitate proof-of-concept of handling, emplacement, and retrieval activities using surrogate waste containers. Guidelines for favorable DBFT site geohydrochemical and geomechanical conditions will be discussed and status of the DBFT Project will be provided. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. SAND2015-6426A. JF - American Geophysical Union Fall Meeting AU - Sassani, David AU - Kuhlman, Kristopher L AU - Freeze, Geoff A AU - MacKinnon, Robert J AU - Perry, Frank AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H11B EP - 1325 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819894300?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Site+guidelines+for+a+deep+borehole+field+test&rft.au=Sassani%2C+David%3BKuhlman%2C+Kristopher+L%3BFreeze%2C+Geoff+A%3BMacKinnon%2C+Robert+J%3BPerry%2C+Frank%3BAnonymous&rft.aulast=Sassani&rft.aufirst=David&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Geomechanical considerations for the deep borehole field test AN - 1819894156; 2016-080170 AB - Deep borehole disposal of high-level radioactive waste is under consideration as a potential alternative to shallower mined repositories. The disposal concept consists of drilling a borehole into crystalline basement rocks to a depth of 5 km, emplacement of canisters containing solid waste in the lower 2 km, and plugging and sealing the upper 3 km of the borehole. Crystalline rocks such as granites are particularly attractive for borehole emplacement because of their low permeability and porosity at depth, and high mechanical strength to resist borehole deformation. In addition, high overburden pressures contribute to sealing of some of the fractures that provide transport pathways. We present geomechanical considerations during construction (e.g., borehole breakouts, disturbed rock zone development, and creep closure), relevant to both the smaller-diameter characterization borehole (8.5") and the larger-diameter field test borehole (17"). Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Park, Byoung-Yoon AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H11B EP - 1323 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819894156?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Geomechanical+considerations+for+the+deep+borehole+field+test&rft.au=Park%2C+Byoung-Yoon%3BAnonymous&rft.aulast=Park&rft.aufirst=Byoung-Yoon&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Geomechanical engineering concepts applied to deep borehole disposal wells AN - 1819894136; 2016-080185 AB - Deep borehole disposal (DBD) of certain defense-generated radioactive waste forms is being considered by the US Department of Energy (DOE) as an alternative to mined repositories. The 17 inch diameter vertical boreholes are planned to be drilled in crystalline basement rock. As part of an initial field test program, the DOE will drill a demonstration borehole, to be used to test equipment for handling and emplacing prototype nonradioactive waste containers, and a second smaller diameter borehole, to be used for site characterization. Both boreholes will be drilled to a depth of 5 km. Construction of such boreholes is expected to be complex because of their overall length, large diameter, and anticipated downhole conditions of high temperatures, pore pressures, and stress regimes. It is believed that successful development of DBD boreholes can only be accomplished if geologic and tectonic conditions are characterized and drill activities are designed based on that understanding. Our study focuses primarily on using the in situ state of stress to mitigate borehole wall failure, whether tensile or compressive. The measured stresses, or their constrained estimates, will include pore pressure, the vertical stress, the horizontal stresses and orientations, and thermally induced stresses. Pore pressure will be measured directly or indirectly. Horizontal stresses will be estimated from hydraulic fracturing tests, leak off tests, and breakout characteristics. Understanding the site stress condition along with the rock's strength characteristics will aid in the optimization of mud weight and casing design required to control borehole wall failure and other drilling problems. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. SAND2015-6552A JF - American Geophysical Union Fall Meeting AU - Herrick, Courtney G AU - Haimson, Bezalel C AU - Lee, Moo AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H11B EP - 1338 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819894136?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Geomechanical+engineering+concepts+applied+to+deep+borehole+disposal+wells&rft.au=Herrick%2C+Courtney+G%3BHaimson%2C+Bezalel+C%3BLee%2C+Moo%3BAnonymous&rft.aulast=Herrick&rft.aufirst=Courtney&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Numerical modeling of deep borehole disposal performance; influence of regional hydrology AN - 1819894017; 2016-080176 AB - Long-term waste isolation at a deep borehole disposal facility is most favorable at a site where the crystalline basement is hydraulically isolated and groundwater flow is negligible. Site suitability guidelines include evidence of lack of fluid flow in basement, for example lack of significant topographic relief, or evidence of ancient and/or saline groundwater at depth. However, lack of local topographic relief does not preclude regional hydraulic gradients created by recharge and discharge at distant outcrops; and precisely because of hydraulic isolation, the crystalline basement has the potential to be over- or under-pressured relative to overlying units. In the absence of previous boreholes in the area of a potential site, hydraulic gradients at depth are difficult to predict, and the possibility remains that a deep borehole drilled for the disposal of waste will encounter vertical or lateral driving forces for fluid flow. This study asks the question: How large a driving force can be tolerated while still maintaining repository performance? We use PFLOTRAN (an open source, massively parallel subsurface flow and reactive transport code) and a 3-D model domain (representing a disposal borehole in crystalline basement overlain by sedimentary strata) to examine the influence of horizontal and vertical hydraulic gradients on the long-term performance of a deep borehole radioactive waste repository. Simulations include steady-state lateral hydraulic gradients and transient vertical hydraulic gradients, and predict radionuclide concentrations in an overlying aquifer to quantify the potential influence of regional hydraulic gradients on repository performance. JF - American Geophysical Union Fall Meeting AU - Stein, Emily R AU - Hammond, Glenn E AU - Freeze, Geoff A AU - Hadgu, Teklu AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H11B EP - 1329 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819894017?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Numerical+modeling+of+deep+borehole+disposal+performance%3B+influence+of+regional+hydrology&rft.au=Stein%2C+Emily+R%3BHammond%2C+Glenn+E%3BFreeze%2C+Geoff+A%3BHadgu%2C+Teklu%3BAnonymous&rft.aulast=Stein&rft.aufirst=Emily&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - PFLOTRAN simulation of waste isolation pilot plant single waste panel AN - 1815673248; 2016-075681 AB - The Waste Isolation Pilot Plant (WIPP), located in southeastern New Mexico, has been developed by the U.S. Department of Energy (DOE) for the deep geologic disposal of transuranic (TRU) waste. WIPP performance assessment (PA) calculations estimate the probability and consequence of potential radionuclide releases from the repository to the accessible environment arising from events and processes that could occur over the 10,000 year regulatory period. The conceptual model estimates three possible cases and the combinations of these cases: 1) undisturbed condition of the repository, 2) human borehole intrusion condition that penetrates the repository, and 3) human borehole intrusion that penetrates pressurized brine underlying the repository. To date, WIPP PA calculations have employed multiple two-dimensional (2D) numerical models requiring simplification of the mesh and processes including homogenization of materials and regions while maintaining volume aspect ratio. Introducing three-dimensional (3D) numerical models within WIPP PA enables increasingly realistic representations of the WIPP subsurface domain and improved flexibility for incorporating relevant features. PFLOTRAN is a state-of-art massively parallel subsurface flow and reactive transport code that will be implemented to enhance PA with more physically realistic 3D flow and transport models; eliminating the need for multiple related, but decoupled 2D models. This paper demonstrates PFLOTRAN simulation of a single waste panel of the WIPP undisturbed condition in 3D. The simulation also employs newly implemented WIPP specific functionalities to PFLOTRAN: 1) gas generation from the wastes, 2) creep closure of bedded salt formation, 3) fractures of marker beds near the excavation, 4) Klinkenberg effect on gas permeability in low-permeable materials, and 5) Redlich-Kwong-Soave equation of state for gas density. JF - American Geophysical Union Fall Meeting AU - Park, Heeho AU - Hammond, Glenn E AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H12A EP - 02 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815673248?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=PFLOTRAN+simulation+of+waste+isolation+pilot+plant+single+waste+panel&rft.au=Park%2C+Heeho%3BHammond%2C+Glenn+E%3BAnonymous&rft.aulast=Park&rft.aufirst=Heeho&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Experimental and numerical study of pore-scale multi-phase flow dynamics AN - 1815673025; 2016-075772 AB - Understanding multiphase fluid flow is critical for many applications, including CO2 sequestration, bioremediation, and oil recovery. Micro-fluidic experiments and pore-scale simulations become important tools in studying multiphase flow in porous media. At the same time, many pore-scale numerical models lack rigorous validation and verification, and micro-fluidic experiments are hard to reproduce due to physical instabilities and challenges in precisely controlling the experiments. We performed a set of microcell experiments and determined conditions necessary to obtain reproducible pore-scale evolution of the fluid-fluid interfaces during both infiltration and drainage phases. Next, we modeled the experiments using Finite Volume and Smoothed Particle Hydrodynamics codes. The point-by-point comparison of the experimental results and numerical simulations revealed advantages and disadvantages of these two methods in capturing the overall behavior and pore-scale phenomena, including residual saturations, formation of thin films, fluid bridges and various fluid trapping mechanisms. JF - American Geophysical Union Fall Meeting AU - Tartakovsky, Alexandre M AU - Ling, Bowen AU - Oostrom, Mart AU - Bao, Jie AU - Kim, Kyungjoo AU - Trask, Nathaniel AU - Battiato, Ilenia AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H23D EP - 1605 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815673025?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Experimental+and+numerical+study+of+pore-scale+multi-phase+flow+dynamics&rft.au=Tartakovsky%2C+Alexandre+M%3BLing%2C+Bowen%3BOostrom%2C+Mart%3BBao%2C+Jie%3BKim%2C+Kyungjoo%3BTrask%2C+Nathaniel%3BBattiato%2C+Ilenia%3BAnonymous&rft.aulast=Tartakovsky&rft.aufirst=Alexandre&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Microscopic evidence of grain boundary moisture during granular salt reconsolidation AN - 1815672284; 2016-075896 AB - Very low permeability is a principal reason salt formations are considered viable hosts for disposal of nuclear waste and spent nuclear fuel. Granular salt is likely to be used as back-fill material and a seal system component. Salt formation pressures will promote reconsolidation of granular salt, eventually resulting in low permeabilities, comparable to native salt. Understanding the consolidation processes, dependent on the stress state, moisture availability and temperature, is important for demonstrating sealing functions and long-term repository performance. As granular salt consolidates, initial void reduction is achieved by brittle processes of grain rearrangement and cataclastic flow. At porosities less than 10%, grain boundary processes and crystal-plastic mechanisms govern further porosity reduction. When present, fluid assists in grain boundary processes and recrystallization. Fluid inclusions are typically found in abundance within bedded salt crystal structure and along grain boundaries, but are rarely observed internal to domal salt grains. We have observed fluid canals and evidence of moisture along grain boundaries in domal salt. In this research, we investigate grain boundary moisture in granular salt that has been reconsolidated under high temperatures to relatively low porosity. Mine-run salt from the Waste Isolation Pilot Plant and Avery Island was used to create cylindrical samples, vented and unvented, which were reconsolidated at 250 degrees C and stresses to 20 MPa. Unvented reconsolidation retains essentially all the grain boundary moisture as found ubiquitously on scanning electron photomicrographs of consolidated samples which revealed an inhomogeneous distribution of canals from residual moisture. This contrasts significantly with the vented samples, which had virtually no grain boundary moisture after consolidation. Microstructural techniques include scanning electron, stereo-dynascopic, and optical microscopy. The observations will be used to support evaluation of a constitutive model for reconsolidating granular salt to be used to predict thermal-mechanical-hydrologic responses of salt repository seal structures and backfilled rooms. JF - American Geophysical Union Fall Meeting AU - Mills, Melissa Marie AU - Hansen, Frank AU - Bauer, Stephen J AU - Stormont, John AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR21B EP - 2619 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815672284?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Microscopic+evidence+of+grain+boundary+moisture+during+granular+salt+reconsolidation&rft.au=Mills%2C+Melissa+Marie%3BHansen%2C+Frank%3BBauer%2C+Stephen+J%3BStormont%2C+John%3BAnonymous&rft.aulast=Mills&rft.aufirst=Melissa&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Integrating ensemble data assimilation and indicator geostatistics to delineate hydrofacies spatial distribution AN - 1815672274; 2016-075721 AB - We present a new framework for delineating spatial distributions of hydrofacies from indirect data by linking ensemble-based data assimilation method (e.g., Ensemble Kalman filter, EnKF) with indicator geostatistics based on transition probability. The nature of ensemble data assimilation makes the framework efficient and flexible to integrate various types of observation data. We leveraged the level set concept to establish transformations between discrete hydrofacies and continuous variables, which is a critical element to implement ensemble data assimilation methods for hydrofacies delineation. T-PROGS is used to generate realizations of hydrofacies fields given conditioning points. An additional quenching step of T-PROGS is taken to preserve spatial structure of updated hydrofacies after each data assimilation step. This new method is illustrated by a two-dimensional (2-D) synthetic study in which transient hydraulic head data resulting from pumping is assimilated to delineate hydrofacies distribution. Our results showed that the proposed framework was able to characterize hydrofacies distribution and their associated permeability with adequate accuracy even with limited direct hydrofacies data. This method may find broader applications in facies delineation using other types of indirect measurements, such as tracer tests and geophysical surveys. JF - American Geophysical Union Fall Meeting AU - Song, Xuehang AU - Chen, Xingyuan AU - Ye, Ming AU - Dai, Zhenxue AU - Hammond, Glenn E AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H13A EP - 1488 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815672274?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Integrating+ensemble+data+assimilation+and+indicator+geostatistics+to+delineate+hydrofacies+spatial+distribution&rft.au=Song%2C+Xuehang%3BChen%2C+Xingyuan%3BYe%2C+Ming%3BDai%2C+Zhenxue%3BHammond%2C+Glenn+E%3BAnonymous&rft.aulast=Song&rft.aufirst=Xuehang&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Efficient high-dimensional characterization of conductivity in a sand box using massive MRI-imaged concentration data AN - 1815672252; 2016-075752 AB - Characterizing subsurface properties, particularly hydraulic conductivity, is crucial for reliable and cost-effective groundwater supply management, contaminant remediation, and emerging deep subsurface activities such as geologic carbon storage and unconventional resources recovery. With recent advances in sensor technology, a large volume of hydro-geophysical and chemical data can be obtained to achieve high-resolution images of subsurface properties, which can be used for accurate subsurface flow and reactive transport predictions. However, subsurface characterization with a plethora of information requires high, often prohibitive, computational costs associated with "big data" processing and large-scale numerical simulations. As a result, traditional inversion techniques are not well-suited for problems that require coupled multi-physics simulation models with massive data. In this work, we apply a scalable inversion method called Principal Component Geostatistical Approach (PCGA) for characterizing heterogeneous hydraulic conductivity (K) distribution in a 3-D sand box. The PCGA is a Jacobian-free geostatistical inversion approach that uses the leading principal components of the prior information to reduce computational costs, sometimes dramatically, and can be easily linked with any simulation software. Sequential images of transient tracer concentrations in the sand box were obtained using magnetic resonance imaging (MRI) technique, resulting in 6 million tracer-concentration data [Yoon et. al., 2008]. Since each individual tracer observation has little information on the K distribution, the dimension of the data was reduced using temporal moments and discrete cosine transform (DCT). Consequently, 100,000 unknown K values consistent with the scale of MRI data (at a scale of 0.25 (super 3) cm (super 3) ) were estimated by matching temporal moments and DCT coefficients of the original tracer data. Estimated K fields are close to the true K field, and even small-scale variability of the sand box was captured to highlight high K connectivity and contrasts between low and high K zones. Total number of 1,000 MODFLOW and MT3DMS simulations were required to obtain final estimates and corresponding estimation uncertainty, showing the efficiency and effectiveness of our method. JF - American Geophysical Union Fall Meeting AU - Lee, Jonghyun Harry AU - Yoon, Hongkyu AU - Kitanidis, Peter K AU - Werth, Charles J AU - Valocchi, Albert J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H13E EP - 1587 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815672252?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Efficient+high-dimensional+characterization+of+conductivity+in+a+sand+box+using+massive+MRI-imaged+concentration+data&rft.au=Lee%2C+Jonghyun+Harry%3BYoon%2C+Hongkyu%3BKitanidis%2C+Peter+K%3BWerth%2C+Charles+J%3BValocchi%2C+Albert+J%3BAnonymous&rft.aulast=Lee&rft.aufirst=Jonghyun&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Hybrid multiscale simulation of hydrologic and biogeochemical processes in the river-groundwater interaction zone AN - 1815672235; 2016-075797 AB - The zone in which river water and groundwater mix plays an important role in natural ecosystems as it regulates the mixing of nutrients that control biogeochemical transformations. Subsurface heterogeneity leads to local hotspots of microbial activity that are important to system function yet difficult to resolve computationally. To address this challenge, we are testing a hybrid multiscale approach that couples models at two distinct scales, based on field research at the U. S. Department of Energy's Hanford Site. The region of interest is a 400 x 400X20 m macroscale domain that intersects the aquifer and the river and contains a contaminant plume. However, biogeochemical activity is high in a thin zone (mud layer, <1 m thick) immediately adjacent to the river. This microscale domain is highly heterogeneous and requires fine spatial resolution to adequately represent the effects of local mixing on reactions. It is not computationally feasible to resolve the full macroscale domain at the fine resolution needed in the mud layer, and the reaction network needed in the mud layer is much more complex than that needed in the rest of the macroscale domain. Hence, a hybrid multiscale approach is used to efficiently and accurately predict flow and reactive transport at both scales. In our simulations, models at both scales are simulated using the PFLOTRAN code. Multiple microscale simulations in dynamically defined sub-domains (fine resolution, complex reaction network) are executed and coupled with a macroscale simulation over the entire domain (coarse resolution, simpler reaction network). The objectives of the research include: 1) comparing accuracy and computing cost of the hybrid multiscale simulation with a single-scale simulation; 2) identifying hot spots of microbial activity; and 3) defining macroscopic quantities such as fluxes, residence times and effective reaction rates. JF - American Geophysical Union Fall Meeting AU - Yang, Xiaofan AU - Scheibe, Timothy D AU - Chen, Xingyuan AU - Hammond, Glenn E AU - Song, Xuehang AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract H23F EP - 1646 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815672235?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Hybrid+multiscale+simulation+of+hydrologic+and+biogeochemical+processes+in+the+river-groundwater+interaction+zone&rft.au=Yang%2C+Xiaofan%3BScheibe%2C+Timothy+D%3BChen%2C+Xingyuan%3BHammond%2C+Glenn+E%3BSong%2C+Xuehang%3BAnonymous&rft.aulast=Yang&rft.aufirst=Xiaofan&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Laboratory scale hydraulic fracture and proppant injection AN - 1815670725; 2016-075942 AB - A series of fracture and proppant injection tests have been conducted on Marcellus shale from an outcrop in Pennsylvania at the laboratory scale. The shale outcrop was recently exposed by new construction and shows little sign of weathering. Specimens 3 inches in diameter and nominally 6 inches long were cored (parallel to bedding) from blocks taken from the outcrop. A 3 inch hole was then cored down the center of the specimen and "cased" with 0.25 inch high pressure tubing, leaving 0.75 inches of space at the bottom of the borehole uncased. Specimens were then loaded under in an axisymmetric extension stress state and hydraulically fractured in order to generate the appropriate fracture orientation to represent the opening of a fracture in a typical long horizontal well, where fractures are "disks on a string". After fracture with water, while still under stress, a guar/proppant mixture was injected into the specimen to investigate the distribution of proppant in the fracture. Silicon carbide particles were used as proppant to assist in proppant visualization in microCT scans performed after the test was completed. Corresponding numerical analyses (using the finite element method) of the flow path and particle transport are underway, coupled with idealized flow experiments to validate the codes being used to model the particle transport. Some of the meshes being used were developed directly from CT scans. JF - American Geophysical Union Fall Meeting AU - Ingraham, Matthew D AU - Rao, Rekha R AU - Bolintineanu, Daniel AU - Lechman, Jeremy B AU - Bauer, Stephen J AU - Quintana, Enrico AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract NG13A EP - 1873 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1815670725?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Laboratory+scale+hydraulic+fracture+and+proppant+injection&rft.au=Ingraham%2C+Matthew+D%3BRao%2C+Rekha+R%3BBolintineanu%2C+Daniel%3BLechman%2C+Jeremy+B%3BBauer%2C+Stephen+J%3BQuintana%2C+Enrico%3BAnonymous&rft.aulast=Ingraham&rft.aufirst=Matthew&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-01 N1 - CODEN - #07548 ER - TY - JOUR T1 - Micromechanical tests and geochemical modeling to evaluate evolution of rock alteration by CO2-water mixtures AN - 1812220467; 2016-072478 AB - Injection of large volumes of CO2 into geologic formations can help reduce the atmospheric CO2 concentration and lower the impact of burning fossil fuels. However, the injection of CO2 into the subsurface shifts the chemical equilibrium between the mineral assemblage and the pore fluid. This shift will situationally facilitate dissolution and reprecipitation of mineral phases, in particular intergranular cements, and can potentially affect the long term mechanical stability of the host formation. The study of these coupled chemical-mechanical reservoir rock responses can help identify and control unexpected emergent behavior associated with geological CO2 storage. Experiments show that micro-mechanical methods are useful in capturing a variety of mechanical parameters, including Young's modulus, hardness and fracture toughness. In particular, micro-mechanical measurements are well-suited for examining thin altered layers on the surfaces of rock specimens, as well as capturing variability on the scale of lithofacies. We performed indentation and scratching tests on sandstone and siltstone rocks altered in natural CO2-brine environments, as well as on analogous samples altered under high pressure, temperature, and dissolved CO2 conditions in a controlled laboratory experiment. We performed geochemical modeling to support the experimental observations, in particular to gain the insight into mineral dissolution/precipitation as a result of the rock-water-CO2 reactions. The comparison of scratch measurements performed on specimens both unaltered and altered by CO2 over geologic time scales results in statistically different values for fracture toughness and scratch hardness, indicating that long term exposure to CO2 caused mechanical degradation of the reservoir rock. Geochemical modeling indicates that major geochemical change caused by CO2 invasion of Entrada sandstone is dissolution of hematite cement, and its replacement with siderite and dolomite during the alteration process. JF - American Geophysical Union Fall Meeting AU - Aman, M AU - Sun, Y AU - Ilgen, A AU - Espinoza, N AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract MR41B EP - 2636 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812220467?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Micromechanical+tests+and+geochemical+modeling+to+evaluate+evolution+of+rock+alteration+by+CO2-water+mixtures&rft.au=Aman%2C+M%3BSun%2C+Y%3BIlgen%2C+A%3BEspinoza%2C+N%3BAnonymous&rft.aulast=Aman&rft.aufirst=M&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-08-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Towards quantifying uncertainty in Greenland's contribution to 21st century sea-level rise AN - 1812218192; 2016-068706 AB - We present recent work towards developing a methodology for quantifying uncertainty in Greenland's 21st century contribution to sea-level rise. While we focus on uncertainties associated with the optimization and calibration of the basal sliding parameter field, the methodology is largely generic and could be applied to other (or multiple) sets of uncertain model parameter fields. The first step in the workflow is the solution of a large-scale, deterministic inverse problem, which minimizes the mismatch between observed and computed surface velocities by optimizing the two-dimensional coefficient field in a linear-friction sliding law. We then expand the deviation in this coefficient field from its estimated "mean" state using a reduced basis of Karhunen-Loeve Expansion (KLE) vectors. A Bayesian calibration is used to determine the optimal coefficient values for this expansion. The prior for the Bayesian calibration can be computed using the Hessian of the deterministic inversion or using an exponential covariance kernel. The posterior distribution is then obtained using Markov Chain Monte Carlo run on an emulator of the forward model. Finally, the uncertainty in the modeled sea-level rise is obtained by performing an ensemble of forward propagation runs. We present and discuss preliminary results obtained using a moderate-resolution model of the Greenland Ice sheet. As demonstrated in previous work, the primary difficulty in applying the complete workflow to realistic, high-resolution problems is that the effective dimension of the parameter space is very large. JF - American Geophysical Union Fall Meeting AU - Perego, Mauro AU - Tezaur, Irina AU - Price, Stephen F AU - Jakeman, John AU - Eldred, Mike AU - Salinger, Andy AU - Hoffman, Matthew J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract C53E EP - 03 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812218192?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Towards+quantifying+uncertainty+in+Greenland%27s+contribution+to+21st+century+sea-level+rise&rft.au=Perego%2C+Mauro%3BTezaur%2C+Irina%3BPrice%2C+Stephen+F%3BJakeman%2C+John%3BEldred%2C+Mike%3BSalinger%2C+Andy%3BHoffman%2C+Matthew+J%3BAnonymous&rft.aulast=Perego&rft.aufirst=Mauro&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-08-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Benchmark study of 3D pore-scale flow and solute transport simulation methods AN - 1807509502; 2016-066695 AB - Multiple numerical approaches have been developed to simulate porous media fluid flow and solute transport at the pore scale. These include 1) methods that explicitly model the three-dimensional geometry of pore spaces and 2) methods that conceptualize the pore space as a topologically consistent set of stylized pore bodies and pore throats. In previous work we validated a model of the first type, using computational fluid dynamics (CFD) codes employing standard finite volume method (FVM), against magnetic resonance velocimetry (MRV) measurements of pore-scale velocities. Here we expand that benchmark study to include additional models of the first type based on the immersed-boundary method (IMB), lattice Boltzmann method (LBM), and smoothed particle hydrodynamics (SPH), as well as a model of the second type, a pore-network model (PNM). While the PNM approach is computationally much less demanding than direct numerical simulation methods, the effect of conceptualizing complex three-dimensional pore geometries in the manner of PNMs has not been fully determined. We apply all five approaches (FVM-based CFD, IMB, LBM, SPH and PNM) to simulate pore-scale velocity distributions and nonreactive solute transport, and intercompare the model results. Comparisons are drawn both in terms of macroscopic variables (e.g., permeability, solute breakthrough curves) and microscopic variables (e.g., local velocities and concentrations). Generally good agreement was achieved among the various approaches, but some differences were observed depending on the model context. The benchmark study was challenging because of variable capabilities of the codes, and inspired some code enhancements to allow consistent comparison of flow and transport simulations across the full suite of methods. This study provides support for confidence in a variety of pore-scale modeling methods, and motivates further development and application of pore-scale simulation methods. JF - American Geophysical Union Fall Meeting AU - Scheibe, T D AU - Yang, X AU - Mehmani, Y AU - Perkins, William A AU - Pasquali, A AU - Schoenherr, M AU - Kim, K AU - Perego, M AU - Parks, M L AU - Trask, Nathaniel AU - Balhoff, M AU - Richmond, M C AU - Geier, M AU - Krafczyk, M AU - Luo, L S AU - Tartakovsky, A M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B43B EP - 0545 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509502?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Benchmark+study+of+3D+pore-scale+flow+and+solute+transport+simulation+methods&rft.au=Scheibe%2C+T+D%3BYang%2C+X%3BMehmani%2C+Y%3BPerkins%2C+William+A%3BPasquali%2C+A%3BSchoenherr%2C+M%3BKim%2C+K%3BPerego%2C+M%3BParks%2C+M+L%3BTrask%2C+Nathaniel%3BBalhoff%2C+M%3BRichmond%2C+M+C%3BGeier%2C+M%3BKrafczyk%2C+M%3BLuo%2C+L+S%3BTartakovsky%2C+A+M%3BAnonymous&rft.aulast=Scheibe&rft.aufirst=T&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Uranium plume persistence impacted by hydrologic and geochemical heterogeneity in the groundwater and river water interaction zone of Hanford site AN - 1807509150; 2016-066750 AB - The behavior of a persistent uranium plume in an extended groundwater- river water (GW-SW) interaction zone at the DOE Hanford site is dominantly controlled by river stage fluctuations in the adjacent Columbia River. The plume behavior is further complicated by substantial heterogeneity in physical and geochemical properties of the host aquifer sediments. Multi-scale field and laboratory experiments and reactive transport modeling were integrated to understand the complex plume behavior influenced by highly variable hydrologic and geochemical conditions in time and space. In this presentation we (1) describe multiple data sets from field-scale uranium adsorption and desorption experiments performed at our experimental well-field, (2) develop a reactive transport model that incorporates hydrologic and geochemical heterogeneities characterized from multi-scale and multi-type datasets and a surface complexation reaction network based on laboratory studies, and (3) compare the modeling and observation results to provide insights on how to refine the conceptual model and reduce prediction uncertainties. The experimental results revealed significant spatial variability in uranium adsorption/desorption behavior, while modeling demonstrated that ambient hydrologic and geochemical conditions and heterogeneities in sediment physical and chemical properties both contributed to complex plume behavior and its persistence. Our analysis provides important insights into the characterization, understanding, modeling, and remediation of groundwater contaminant plumes influenced by surface water and groundwater interactions. JF - American Geophysical Union Fall Meeting AU - Chen, X AU - Zachara, J M AU - Vermeul, V R AU - Freshley, M AU - Hammond, G E AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B51C EP - 0441 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509150?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Uranium+plume+persistence+impacted+by+hydrologic+and+geochemical+heterogeneity+in+the+groundwater+and+river+water+interaction+zone+of+Hanford+site&rft.au=Chen%2C+X%3BZachara%2C+J+M%3BVermeul%2C+V+R%3BFreshley%2C+M%3BHammond%2C+G+E%3BAnonymous&rft.aulast=Chen&rft.aufirst=X&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - PFLOTRAN; recent developments facilitating massively-parallel reactive biogeochemical transport AN - 1807509107; 2016-066696 AB - With the recent shift towards modeling carbon and nitrogen cycling in support of climate-related initiatives, emphasis has been placed on incorporating increasingly mechanistic biogeochemistry within Earth system models to more accurately predict the response of terrestrial processes to natural and anthropogenic climate cycles. PFLOTRAN is an open-source subsurface code that is specialized for simulating multiphase flow and multicomponent biogeochemical transport on supercomputers. The object-oriented code was designed with modularity in mind and has been coupled with several third-party simulators (e.g. CLM to simulate land surface processes and E4D for coupled hydrogeophysical inversion). Central to PFLOTRAN's capabilities is its ability to simulate tightly-coupled reactive transport processes. This presentation focuses on recent enhancements to the code that enable the solution of large parameterized biogeochemical reaction networks with numerous chemical species. PFLOTRAN's "reaction sandbox" is described, which facilitates the implementation of user-defined reaction networks without the need for a comprehensive understanding of PFLOTRAN software infrastructure. The reaction sandbox is written in modern Fortran (2003-2008) and leverages encapsulation, inheritance, and polymorphism to provide the researcher with a flexible workspace for prototyping reactions within a massively parallel flow and transport simulation framework. As these prototypical reactions mature into well-accepted implementations, they can be incorporated into PFLOTRAN as native biogeochemistry capability. Users of the reaction sandbox are encouraged to upload their source code to PFLOTRAN's main source code repository, including the addition of simple regression tests to better ensure the long-term code compatibility and validity of simulation results. JF - American Geophysical Union Fall Meeting AU - Hammond, G E AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B43B EP - 0547 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807509107?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=PFLOTRAN%3B+recent+developments+facilitating+massively-parallel+reactive+biogeochemical+transport&rft.au=Hammond%2C+G+E%3BAnonymous&rft.aulast=Hammond&rft.aufirst=G&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - The role of groundwater and river water interactions in modulating land surface and subsurface states and fluxes; a local-scale case study along the Columbia River shoreline AN - 1807508935; 2016-064422 AB - Lateral flow and transport between groundwater and river water through the subsurface interaction zone (SIZ) is a major pathway for energy, water, solute, and gas transfer between terrestrial and aquatic systems. Groundwater - surface water exchange is significant at multiple scales, but is not adequately resolved in Earth System Models (ESMs). In this study, an integrated land surface and subsurface model enhanced with hydrologic exchange was assembled within the land component of an ESM (i.e., the Community Land Model (CLM) coupled with PFLOTRAN) to investigate how land surface and subsurface states and fluxes are influenced by the lateral flow and mixing of waters within the SIZ. The new model was applied to a domain including 400 m of the Columbia River shoreline where subsurface properties and processes have been well-characterized through sediment characterization, pump tests, tracer experiments, and field monitoring of river water intrusion events driven by river stage changes. Simulations of CLM-PFLOTRAN at multiple spatial resolutions were conducted using observed meteorological and river stage data under different climate and hydrologic conditions. The coupled model revealed the importance of interaction zone processes in regulating temporal and spatial variability in land surface and subsurface hydrological fluxes and state variables, indicating strong nonlinear coupling between hydrologic and biogeochemical processes in riparian zones. The simulations are validated against field measurements collected at the site. Our results provide a foundation for better understanding the spatial and temporal dynamics of biogeochemical cycling and biogenic gas generation in the SIZ, and their regulation by the changing water cycle and climate. JF - American Geophysical Union Fall Meeting AU - Huang, M AU - Bisht, G AU - Chen, X AU - Hammond, G E AU - Zachara, J M AU - Riley, W J AU - Downs, J AU - Liu, Y AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B41A EP - 0409 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508935?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+role+of+groundwater+and+river+water+interactions+in+modulating+land+surface+and+subsurface+states+and+fluxes%3B+a+local-scale+case+study+along+the+Columbia+River+shoreline&rft.au=Huang%2C+M%3BBisht%2C+G%3BChen%2C+X%3BHammond%2C+G+E%3BZachara%2C+J+M%3BRiley%2C+W+J%3BDowns%2C+J%3BLiu%2C+Y%3BAnonymous&rft.aulast=Huang&rft.aufirst=M&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - A hybrid multiscale framework for subsurface flow and transport simulations AN - 1807508321; 2016-064421 AB - Extensive research efforts have been invested in reducing model errors to improve the predictive ability of biogeochemical earth and environmental system simulators, with applications ranging from contaminant transport and remediation to impacts of biogeochemical elemental cycling (e.g., carbon and nitrogen) on local ecosystems and regional to global climate. While improved process understanding can be achieved through scientific study, such understanding is usually developed at small scales. Process-based numerical models are typically designed for a particular characteristic length and time scale. For application-relevant scales, it is generally necessary to introduce approximations and empirical parameterizations to describe complex systems or processes. This single-scale approach has been the best available to date because of limited understanding of process coupling combined with practical limitations on system characterization and computation. The application of advanced computational resources, new scientific process descriptions, and state-of-the-art characterization methods to advance predictive understanding of the larger system behavior requires the development of multiscale simulators. Accordingly there has been much recent interest in novel multiscale methods in which microscale and macroscale models are explicitly coupled in a single hybrid multiscale simulation. A limited number of hybrid multiscale simulations have been developed for biogeochemical earth systems, but they mostly utilize application-specific and sometimes ad-hoc approaches for model coupling. We are developing a generalized approach to hierarchical model coupling designed for high-performance computational systems. In this presentation we will describe the generalized approach and provide two example implementations. JF - American Geophysical Union Fall Meeting AU - Scheibe, T D AU - Yang, X AU - Chen, X AU - Hammond, G E AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B41A EP - 0406 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508321?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+hybrid+multiscale+framework+for+subsurface+flow+and+transport+simulations&rft.au=Scheibe%2C+T+D%3BYang%2C+X%3BChen%2C+X%3BHammond%2C+G+E%3BAnonymous&rft.aulast=Scheibe&rft.aufirst=T&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - UAS-borne photogrammetry for surface topographic characterization; a ground-truth baseline for future change detection and refinement of scaled remotely-sensed datasets AN - 1807507902; 2016-064446 AB - While long-term objectives of monitoring and verification regimes include remote characterization and discrimination of surficial geologic and topographic features at sites of interest, ground truth data is required to advance development of remote sensing techniques. Increasingly, it is desirable for these ground-based or ground-proximal characterization methodologies to be as nimble, efficient, non-invasive, and non-destructive as their higher-altitude airborne counterparts while ideally providing superior resolution. For this study, the area of interest is an alluvial site at the Nevada National Security Site intended for use in the Source Physics Experiment's (Snelson et al., 2013) second phase. Ground-truth surface topographic characterization was performed using a DJI Inspire 1 unmanned aerial system (UAS), at very low altitude (< 5-30m AGL). 2D photographs captured by the standard UAS camera payload were imported into Agisoft Photoscan to create three-dimensional point clouds. Within the area of interest, careful installation of surveyed ground control fiducial markers supplied necessary targets for field collection, and information for model georectification. The resulting model includes a Digital Elevation Model derived from 2D imagery. It is anticipated that this flexible and versatile characterization process will provide point cloud data resolution equivalent to a purely ground-based LiDAR scanning deployment (e.g., 1-2 cm horizontal and vertical resolution; e.g., Sussman et al., 2012; Schultz-Fellenz et al., 2013). In addition to drastically increasing time efficiency in the field, the UAS method also allows for more complete coverage of the study area when compared to ground-based LiDAR. Comparison and integration of these data with conventionally-acquired airborne LiDAR data from a higher-altitude ( nearly equal 450m) platform will aid significantly in the refinement of technologies and detection capabilities of remote optical systems to identify and detect surface geologic and topographic signatures of interest. This work includes a preliminary comparison of surface signatures detected from varying standoff distances to assess current sensor performance and benefits. JF - American Geophysical Union Fall Meeting AU - Coppersmith, Ryan AU - Schultz-Fellenz, E S AU - Sussman, A J AU - Vigil, S AU - Dzur, R AU - Norskog, K AU - Kelley, R AU - Miller, L AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract B41D EP - 0464 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807507902?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=UAS-borne+photogrammetry+for+surface+topographic+characterization%3B+a+ground-truth+baseline+for+future+change+detection+and+refinement+of+scaled+remotely-sensed+datasets&rft.au=Coppersmith%2C+Ryan%3BSchultz-Fellenz%2C+E+S%3BSussman%2C+A+J%3BVigil%2C+S%3BDzur%2C+R%3BNorskog%2C+K%3BKelley%2C+R%3BMiller%2C+L%3BAnonymous&rft.aulast=Coppersmith&rft.aufirst=Ryan&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-07-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Detecting and locating seismic events without phase picks or velocity models AN - 1797539198; 2016-050984 AB - The standard paradigm for seismic event monitoring is to scan waveforms from a network of stations and identify the arrival time of various seismic phases. A signal association algorithm then groups the picks to form events, which are subsequently located by minimizing residuals between measured travel times and travel times predicted by an Earth model. Many of these steps are prone to significant errors which can lead to erroneous arrival associations and event locations. Here, we revisit a concept for event detection that does not require phase picks or travel time curves and fuses detection, association and location into a single algorithm. Our pickless event detector exploits existing catalog and waveform data to build an empirical stack of the full regional seismic wavefield, which is subsequently used to detect and locate events at a network level using correlation techniques. Because the technique uses more of the information content of the original waveforms, the concept is particularly powerful for detecting weak events that would be missed by conventional methods. We apply our detector to seismic data from the University of Utah Seismograph Stations network and compare our results with the earthquake catalog published by the University of Utah. We demonstrate that the pickless detector can detect and locate significant numbers of events previously missed by standard data processing techniques. JF - American Geophysical Union Fall Meeting AU - Arrowsmith, S AU - Young, C J AU - Ballard, S AU - Slinkard, M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51F EP - 08 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797539198?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Detecting+and+locating+seismic+events+without+phase+picks+or+velocity+models&rft.au=Arrowsmith%2C+S%3BYoung%2C+C+J%3BBallard%2C+S%3BSlinkard%2C+M%3BAnonymous&rft.aulast=Arrowsmith&rft.aufirst=S&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Airborne infrasound; a new way to explore the 3D acoustic wavefield AN - 1797539151; 2016-050911 AB - As a part of the Source Physics Experiment (SPE) site characterization and explosive test series, we developed and deployed an airborne octocopter infrasound platform. Traditionally, infrasound data is collected with sensors and arrays that are installed on the ground. For most applications this is sufficient but can be limiting when observing non-isotropic sources, such as underground explosions, at close range. To develop and test the airborne infrasound platform we recorded data from a seismo-acoustic hammer source at the Nevada National Security Site (NNSS). During early field-testing of the hammer source we found that, as the 13 metric ton mass hit the ground, a significant downward deflection of the surrounding surface imparted an observable infrasound pressure wave into the atmosphere. We compared waveforms collected at various vertical and horizontal offsets from the hammer source and found that the peak frequencies differed when observed directly above the source compared to the horizontal offsets. This work was done under award number DE-AC52-06NA25946. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Jones, K R AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51C EP - 2689 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797539151?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Airborne+infrasound%3B+a+new+way+to+explore+the+3D+acoustic+wavefield&rft.au=Jones%2C+K+R%3BAnonymous&rft.aulast=Jones&rft.aufirst=K&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Geophysics, remote sensing, and the Comprehensive Nuclear-Test-Ban Treaty (CTBT) integrated field exercise 2014 AN - 1797538999; 2016-050999 AB - The Integrated Field Exercise of 2014 (IFE14) was an event held in the Hashemite Kingdom of Jordan (with concurrent activities in Austria) that tested the operational and technical capabilities of an on-site inspection (OSI) within the CTBT verification regime. During an OSI, up to 40 international inspectors will search an area for evidence of a nuclear explosion. Over 250 experts from approximately 50 countries were involved in IFE14 (the largest simulation of a real OSI to date) and worked from a number of different directions, such as the Exercise Management and Control Teams (which executed the scenario in which the exercise was played) and those participants performing as members of the Inspection Team (IT). One of the main objectives of IFE14 was to test and integrate Treaty allowed inspection techniques, including a number of geophysical and remote sensing methods. In order to develop a scenario in which the simulated exercise could be carried out, suites of physical features in the IFE14 inspection area were designed and engineered by the Scenario Task Force (STF) that the IT could detect by applying the geophysical and remote sensing inspection technologies, in addition to other techniques allowed by the CTBT. For example, in preparation for IFE14, the STF modeled a seismic triggering event that was provided to the IT to prompt them to detect and localize aftershocks in the vicinity of a possible explosion. Similarly, the STF planted shallow targets such as borehole casings and pipes for detection using other geophysical methods. In addition, airborne technologies, which included multi-spectral imaging, were deployed such that the IT could identify freshly exposed surfaces, imported materials, and other areas that had been subject to modification. This presentation will introduce the CTBT and OSI, explain the IFE14 in terms of the goals specific to geophysical and remote sensing methods, and show how both the preparation for and execution of IFE14 meet those goals. JF - American Geophysical Union Fall Meeting AU - Sussman, A J AU - Macleod, G AU - Labak, P AU - Malich, G AU - Rowlands, A P AU - Craven, J AU - Sweeney, J J AU - Chiappini, M AU - Tuckwell, G AU - Sankey, Peter AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S52B EP - 07 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538999?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Geophysics%2C+remote+sensing%2C+and+the+Comprehensive+Nuclear-Test-Ban+Treaty+%28CTBT%29+integrated+field+exercise+2014&rft.au=Sussman%2C+A+J%3BMacleod%2C+G%3BLabak%2C+P%3BMalich%2C+G%3BRowlands%2C+A+P%3BCraven%2C+J%3BSweeney%2C+J+J%3BChiappini%2C+M%3BTuckwell%2C+G%3BSankey%2C+Peter%3BAnonymous&rft.aulast=Sussman&rft.aufirst=A&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Real-time realizations of the bayesian infrasonic source localization method AN - 1797538315; 2016-050917 AB - The Bayesian Infrasonic Source Localization method (BISL), introduced by Mordak et al. (2010) and upgraded by Marcillo et al. (2014) is destined for the accurate estimation of the atmospheric event origin at local, regional and global scales by the seismic and infrasonic networks and arrays. The BISL is based on probabilistic models of the source-station infrasonic signal propagation time, picking time and azimuth estimate merged with a prior knowledge about celerity distribution. It requires at each hypothetical source location, integration of the product of the corresponding source-station likelihood functions multiplied by a prior probability density function of celerity over the multivariate parameter space. The present BISL realization is generally time-consuming procedure based on numerical integration. The computational scheme proposed simplifies the target function so that integrals are taken exactly and are represented via standard functions. This makes the procedure much faster and realizable in real-time without practical loss of accuracy. The procedure executed as PYTHON-FORTRAN code demonstrates high performance on a set of the model and real data. JF - American Geophysical Union Fall Meeting AU - Pinsky, V AU - Arrowsmith, S AU - Hofstetter, A AU - Nippress, A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51C EP - 2695 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538315?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Real-time+realizations+of+the+bayesian+infrasonic+source+localization+method&rft.au=Pinsky%2C+V%3BArrowsmith%2C+S%3BHofstetter%2C+A%3BNippress%2C+A%3BAnonymous&rft.aulast=Pinsky&rft.aufirst=V&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Developing path-dependent uncertainty estimates for use with the regional seismic travel time (RSTT) model AN - 1797538257; 2016-050978 AB - The Regional Seismic Travel Time (RSTT) tomography model has been developed to improve travel time predictions for regional phases (Pn, Sn, Pg, Lg) in order to increase seismic location accuracy. The RSTT model is specifically designed to exploit regional phases for location, especially when combined with teleseismic arrivals. The latest RSTT model (version 201404) has been released (http://www.sandia.gov/rstt). Travel time uncertainty estimates for RSTT are determined using one-dimensional (1D), distance-dependent error models, that have the benefit of being very fast to use in standard location algorithms, but do not account for path-dependent variations in error, and structural inadequacy of the RSTTT model (e.g., model error). Although global in extent, the RSTT tomography model is only defined in areas where data exist. A simple 1D error model does not accurately model areas where RSTT has not been calibrated. We are developing and investigating a new covariance matrix for RSTT phase arrivals by mathematically deriving this multivariate error model directly from a unified model of RSTT embedded into a statistical random effects model that captures distance, path and model error effects. An initial method developed is a two-dimensional path-distributed method using residuals. Other methods include a complete random-effects model and the calculation of the full model covariance matrix from the RSTT tomographic inversion. The goals for any RSTT uncertainty method are for it to be both readily useful for the standard RSTT user as well as improve travel time uncertainty estimates for location. JF - American Geophysical Union Fall Meeting AU - Begnaud, M L AU - Anderson, D N AU - Phillips, W S AU - Ballard, S AU - Myers, S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S51F EP - 02 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797538257?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Developing+path-dependent+uncertainty+estimates+for+use+with+the+regional+seismic+travel+time+%28RSTT%29+model&rft.au=Begnaud%2C+M+L%3BAnderson%2C+D+N%3BPhillips%2C+W+S%3BBallard%2C+S%3BMyers%2C+S%3BAnonymous&rft.aulast=Begnaud&rft.aufirst=M&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Full waveform inversion methods for source and media characterization before and after SPE5 AN - 1793207222; 2016-046739 AB - The Source Physics Experiment (SPE) was designed to advance our understanding of explosion-source phenomenology and subsequent wave propagation through the development of innovative physics-based models. Ultimately, these models will be used for characterizing explosions, which can occur with a variety of yields, depths of burial, and in complex media. To accomplish this, controlled chemical explosions were conducted in a granite outcrop at the Nevada Nuclear Security Test Site. These explosions were monitored with extensive seismic and infrasound instrumentation both in the near and far-field. Utilizing this data, we calculate predictions before the explosions occur and iteratively improve our models after each explosion. Specifically, we use an adjoint-based full waveform inversion code that employs discontinuous Galerkin techniques to predict waveforms at station locations prior to the fifth explosion in the series (SPE5). The full-waveform inversions are performed using a realistic geophysical model based on local 3D tomography and inversions for media properties using previous shot data. The code has capabilities such as unstructured meshes that align with material interfaces, local polynomial refinement, and support for various physics and methods for implicit and explicit time-integration. The inversion results we show here evaluate these different techniques, which allows for model fidelity assessment (acoustic versus elastic versus anelastic, etc.). In addition, the accuracy and efficiency of several time-integration methods can be determined. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Phillips-Alonge, K E AU - Knox, Hunter A AU - Ober, C AU - Abbott, R E AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2803 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793207222?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Full+waveform+inversion+methods+for+source+and+media+characterization+before+and+after+SPE5&rft.au=Phillips-Alonge%2C+K+E%3BKnox%2C+Hunter+A%3BOber%2C+C%3BAbbott%2C+R+E%3BAnonymous&rft.aulast=Phillips-Alonge&rft.aufirst=K&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Airborne and ground-based optical characterization of legacy underground nuclear test sites AN - 1793207188; 2016-046754 AB - Detecting, locating, and characterizing suspected underground nuclear test sites is a U.S. security priority. Currently, global underground nuclear explosion monitoring relies on seismic and infrasound sensor networks to provide rapid initial detection of potential underground nuclear tests. While seismic and infrasound might be able to generally locate potential underground nuclear tests, additional sensing methods might be required to further pinpoint test site locations. Optical remote sensing is a robust approach for site location and characterization due to the ability it provides to search large areas relatively quickly, resolve surface features in fine detail, and perform these tasks non-intrusively. Optical remote sensing provides both cultural and surface geological information about a site, for example, operational infrastructure, surface fractures. Surface geological information, when combined with known or estimated subsurface geologic information, could provide clues concerning test parameters. We have characterized two legacy nuclear test sites on the Nevada National Security Site (NNSS), U20ak and U20az using helicopter-, ground- and unmanned aerial system-based RGB imagery and light detection and ranging (lidar) systems. The multi-faceted information garnered from these different sensing modalities has allowed us to build a knowledge base of how a nuclear test site might look when sensed remotely, and the standoff distances required to resolve important site characteristics. JF - American Geophysical Union Fall Meeting AU - Vigil, S AU - Craven, J AU - Anderson, D AU - Dzur, R AU - Schultz-Fellenz, E S AU - Sussman, A J AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2818 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793207188?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Airborne+and+ground-based+optical+characterization+of+legacy+underground+nuclear+test+sites&rft.au=Vigil%2C+S%3BCraven%2C+J%3BAnderson%2C+D%3BDzur%2C+R%3BSchultz-Fellenz%2C+E+S%3BSussman%2C+A+J%3BAnonymous&rft.aulast=Vigil&rft.aufirst=S&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Using KLSH to rapidly search large seismic signal archives on a desktop computer AN - 1793206734; 2016-046761 AB - The use of waveform correlation detection has become increasingly important in the last decade, and as the basic calculation is straightforward, and the online archives of past signals are ever-increasing, the use of technique should only become more widespread. Yet there is an inherent limitation in how widely the method can be applied due to the computational demands of searching large signal archives quickly. In this study, we investigate the applicability of Kernelized Locality-Sensitive Hashing (KLSH) to significantly decrease the computational requirements to the point that searches can be done on a commodity desktop computer. KLSH probabilistically interrogates the database such that much of the database is ignored when searching for closest matches, thereby dramatically reducing the number of correlations that need to be calculated. We evaluate KLSH using data from the IMS primary station MKAR. First we built a KLSH indexed archive using all associated signals from the IDC LEB catalog for 2002-2013 ( approximately 308,000 signals). We then tested the signal matching capability using the approximately 26,000 IDC-detected signals from 2014, including a variety of regional and teleseismic phases (56% are teleseismic P). We used the LEB phase assignments as ground-truth to score the results. Using a simple 0.60 correlation threshold, requiring at least two archive matches, and applying screening criteria based on consistency of metadata of archive matches, we were able to robustly identify 12% of the 2014 signals, including many teleseismic P phases from a variety of locations. Comparing KLSH against a full search, we established a recall rate of > 0.9, with search time on the order of 10 ms. JF - American Geophysical Union Fall Meeting AU - Young, C J AU - Woodbridge, J AU - Shaw, R AU - Slinkard, M AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2825 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206734?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Using+KLSH+to+rapidly+search+large+seismic+signal+archives+on+a+desktop+computer&rft.au=Young%2C+C+J%3BWoodbridge%2C+J%3BShaw%2C+R%3BSlinkard%2C+M%3BAnonymous&rft.aulast=Young&rft.aufirst=C&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Infrasound generation from the source physics experiments AN - 1793206724; 2016-046742 AB - Understanding the acoustic and infrasound source generation mechanisms from underground explosions is of great importance for usage of this unique data type in non-proliferation activities. One of the purposes of the Source Physics Experiments (SPE), a series of underground explosive shots at the Nevada National Security Site (NNSS), is to gain an improved understanding of the generation and propagation of physical signals, such as seismic and infrasound, from the near to far field. Two of the SPE shots (SPE-1 and SPE-4') were designed to be small "Green's Function" sources with minimal spall or permanent surface deformation. We analyze infrasound data collected from these two shots at distances from approximately 300 m to approximately 1 km and frequencies up to 20 Hz. Using weather models based upon actual observations at the times of these sources, including 3-D variations in topography, temperatures, pressures, and winds, we synthesized full waveforms using Sandia's moving media acoustic propagation simulation suite. Several source mechanisms were simulated and compared and contrasted with observed waveforms using full waveform source inversion. We will discuss results of these source inversions including the relative roll of spall from these small explosions. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Preston, L A AU - Schramm, K A AU - Jones, K R AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2806 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206724?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Infrasound+generation+from+the+source+physics+experiments&rft.au=Preston%2C+L+A%3BSchramm%2C+K+A%3BJones%2C+K+R%3BAnonymous&rft.aulast=Preston&rft.aufirst=L&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Modeling seismoacoustic propagation from the nonlinear to linear regimes AN - 1793206664; 2016-046734 AB - Explosions at shallow depth-of-burial can cause nonlinear material response, such as fracturing and spalling, up to the ground surface above the shot point. These motions at the surface affect the generation of acoustic waves into the atmosphere, as well as the surface-reflected compressional and shear waves. Standard source scaling models for explosions do not account for such nonlinear interactions above the shot, while some recent studies introduce a non-isotropic addition to the moment tensor to represent them (e.g., Patton and Taylor, 2011). We are using Sandia's CTH shock physics code to model the material response in the vicinity of underground explosions, up to the overlying ground surface. Across a boundary where the motions have decayed to nearly linear behavior, we couple the signals from CTH into a linear finite-difference (FD) seismoacoustic code to efficiently propagate the wavefields to greater distances. If we assume only one-way transmission of energy through the boundary, then the particle velocities there suffice as inputs for the FD code, simplifying the specification of the boundary condition. The FD algorithm we use applies the wave equations for velocity in an elastic medium and pressure in an acoustic one, and matches the normal traction and displacement across the interface. Initially we are developing and testing a 2D, axisymmetric seismoacoustic routine; CTH can use this geometry in the source region as well. The Source Physics Experiment (SPE) in Nevada has collected seismic and acoustic data on numerous explosions at different scaled depths, providing an excellent testbed for investigating explosion phenomena (Snelson et al., 2013). We present simulations for shots SPE-4' and SPE-5, illustrating the importance of nonlinear behavior up to the ground surface. Our goal is to develop the capability for accurately predicting the relative signal strengths in the air and ground for a given combination of source yield and depth. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Chael, E P AU - Preston, L A AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2798 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206664?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Modeling+seismoacoustic+propagation+from+the+nonlinear+to+linear+regimes&rft.au=Chael%2C+E+P%3BPreston%2C+L+A%3BAnonymous&rft.aulast=Chael&rft.aufirst=E&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Hammering Yucca Flat; Part two, Shear-wave velocity AN - 1793206654; 2016-046745 AB - In preparation for the next phase of the Source Physics Experiment (SPE), we conducted an active-source seismic survey of Yucca Flat, Nevada, on the Nevada National Security Site. Results from this survey will be used to inform the geologic models associated with the SPE project. For this study, we used a novel 13,000 kilogram weight-drop seismic source to interrogate an 18-km North-South transect of Yucca Flat. Source points were spaced every 200 meters and were recorded by 350 to 380 3-component 2-Hz geophones with variable spacings of 10, 20, and 100 meters. We utilized the Refraction-Microtremor (ReMi) technique to create multiple 1D dispersion curves, which were then inverted for shear-wave velocity profiles using the Dix inversion method (Tsai and Haney, 2015). Each of these 1D velocity models was subsequently stitched together to create a 2D profile over the survey area. The dispersion results indicate a general decrease in surface-wave phase velocity to the south. This result is supported by slower shear-wave velocity sediments and increasing basin depth towards the survey's southern extent. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Finlay, T S AU - Abbott, R E AU - Knox, Hunter A AU - Tang, David G AU - James, S R AU - Haney, M M AU - Hampshire, J B, II AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2809 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206654?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Hammering+Yucca+Flat%3B+Part+two%2C+Shear-wave+velocity&rft.au=Finlay%2C+T+S%3BAbbott%2C+R+E%3BKnox%2C+Hunter+A%3BTang%2C+David+G%3BJames%2C+S+R%3BHaney%2C+M+M%3BHampshire%2C+J+B%2C+II%3BAnonymous&rft.aulast=Finlay&rft.aufirst=T&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Improved bulletin generation using an iterative processing framework AN - 1793206556; 2016-046769 AB - Automatic seismic event bulletins are generally produced by performing two sequential processing steps: first station processing to find signal detections, then network processing to form events. This processing paradigm differs significantly from that applied by human analysts. Analysts bring to bear considerable human intuition acquired during the processing of past events and use that to iteratively reprocess data resulting in a significantly improved bulletin. Our Iterative Processing Framework (IPF) attempts to mimic analyst behavior during automatic bulletin generation. After a first pass through signal detection and signal association, the resulting events are compared to historical information with the goal of identifying expected signals which are missing from the set of signals currently available, or which are present but erroneous in some respect. Waveform data is reprocessed to improve the set of available signal detections and signal association is repeated when changes are made. The process is repeated until stability is achieved. IPF also introduces seismic events detected using waveform correlation into automatic processing prior to signal association, which can significantly reduce the number of signal detections available to confuse the automatic signal associator. We present results comparing IPF to traditional methods. JF - American Geophysical Union Fall Meeting AU - Slinkard, M AU - Ballard, S AU - Encarnacao, A V AU - Heck, S AU - Draelos, T AU - Chael, E P AU - Young, C J AU - Brogan, Ronald AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2833 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206556?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Improved+bulletin+generation+using+an+iterative+processing+framework&rft.au=Slinkard%2C+M%3BBallard%2C+S%3BEncarnacao%2C+A+V%3BHeck%2C+S%3BDraelos%2C+T%3BChael%2C+E+P%3BYoung%2C+C+J%3BBrogan%2C+Ronald%3BAnonymous&rft.aulast=Slinkard&rft.aufirst=M&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Hammering Yucca Flat; Part one, P-wave velocity AN - 1793206549; 2016-046744 AB - Explosion-source phenomenology is best studied when competing signals (such as instrument, site, and propagation effects), are well understood. The second phase of the Source Physics Experiments (SPE), is moving from granite geology to alluvium geology at Yucca Flat, Nevada National Security Site. To improve subsurface characterization of Yucca Flat (and therefore better understand propagation and site effects), an active-source seismic survey was conducted using a novel 13,000-kg impulsive hammer source. The source points, spaced 200 m apart, covered a N-S transect spanning 18 km. Three component, 2-Hz geophones were used to record useable signals out to 10 km. We inverted for P-wave velocity by computing travel times using a finite-difference 3D eikonal solver, and then compared that to the picked travel times using a linearized iterative inversion scheme. Preliminary results from traditional reflection processing methods are also presented. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Tang, David G AU - Abbott, R E AU - Preston, L A AU - Hampshire, J B, II AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2808 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206549?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Hammering+Yucca+Flat%3B+Part+one%2C+P-wave+velocity&rft.au=Tang%2C+David+G%3BAbbott%2C+R+E%3BPreston%2C+L+A%3BHampshire%2C+J+B%2C+II%3BAnonymous&rft.aulast=Tang&rft.aufirst=David&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Analysis of a multi-stage sounding rocket via ground--based infrasonic observations AN - 1793206541; 2016-046741 AB - Infrasonic signals produced by a four-stage sounding rocket launched from the Alomar observatory in Norway were recorded at several nearby infrasound arrays. An array very near the launch pad detected infrasound due to the rocket during the full launch, while those further from the launch point were in an acoustic shadow zone while the source was at low altitudes. Analysis of the signals on all arrays found agreement with propagation modeling predictions, implying that signals from multiple arrays could provide a means to reproduce the trajectory of a rocket using infrasonic observations. Interestingly, high-altitude stage ignitions have been found to be very low amplitude in this particular data set, possibly due to inefficiency of the aeroacoustic source mechanism in the rarefied upper atmosphere. JF - American Geophysical Union Fall Meeting AU - Blom, P S AU - Marcillo, O E AU - Arrowsmith, S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2805 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206541?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Analysis+of+a+multi-stage+sounding+rocket+via+ground--based+infrasonic+observations&rft.au=Blom%2C+P+S%3BMarcillo%2C+O+E%3BArrowsmith%2C+S%3BAnonymous&rft.aulast=Blom&rft.aufirst=P&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - SALSA3D; a global 3D velocity model for improved seismic event location in nuclear explosion monitoring AN - 1793202916; 2016-046766 AB - The SALSA3D global, 3D velocity model of the Earths mantle has been developed to improve the accuracy and precision of seismic travel time predictions for a wide suite of regional and teleseismic phases. Improved travel time predictions lead directly to significant improvements in the accuracy and precision of seismic event locations as compared to locations computed using standard 1D velocity models like ak135, or 21/2D models like RSTT. A key feature of SALSA3D is that path-specific model uncertainty of travel time predictions are calculated using the full 3D model covariance matrix computed during tomography, which results in more realistic uncertainty ellipses that directly reflect tomographic data coverage. Recent improvements in the model include the generation of an S velocity model to compliment the P velocity model and development of capability to compute travel times for core phases, reflections off the core-mantle boundary and underside reflections off the Moho and the surface of the Earth. For use in routine operations, travel time predictions and prediction uncertainties are precomputed and stored in station-phase-specific 3D lookup tables, which allows fast, reliable retrieval of information needed by locators. The lookup capabilities are based on the open-source GeoTess software package available at http://www.sandia.gov/geotess. JF - American Geophysical Union Fall Meeting AU - Ballard, S AU - Begnaud, M L AU - Hipp, J R AU - Encarnacao, A V AU - Young, C J AU - Phillips, W S AU - Chael, E P AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S53B EP - 2830 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793202916?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=SALSA3D%3B+a+global+3D+velocity+model+for+improved+seismic+event+location+in+nuclear+explosion+monitoring&rft.au=Ballard%2C+S%3BBegnaud%2C+M+L%3BHipp%2C+J+R%3BEncarnacao%2C+A+V%3BYoung%2C+C+J%3BPhillips%2C+W+S%3BChael%2C+E+P%3BAnonymous&rft.aulast=Ballard&rft.aufirst=S&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-06-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Path-dependent travel time prediction variance and covariance for a global tomographic P- and S-velocity model AN - 1789749593; 2016-042561 AB - Recently our combined SNL-LANL research team has succeeded in developing a global, seamless 3D tomographic P- and S-velocity model (SALSA3D) that provides superior first P and first S travel time predictions at both regional and teleseismic distances. However, given the variable data quality and uneven data sampling associated with this type of model, it is essential that there be a means to calculate high-quality estimates of the path-dependent variance and covariance associated with the predicted travel times of ray paths through the model. In this paper, we describe a methodology for accomplishing this by exploiting the full model covariance matrix and show examples of path-dependent travel time prediction uncertainty computed from our latest tomographic model. Typical global 3D SALSA3D models have on the order of 1/2 million nodes, so the challenge in calculating the covariance matrix is formidable: 0.9 TB storage for 1/2 of a symmetric matrix, necessitating an Out-Of-Core (OOC) blocked matrix solution technique. With our approach the tomography matrix (G which includes a prior model covariance constraint) is multiplied by its transpose (GTG) and written in a blocked sub-matrix fashion. We employ a distributed parallel solution paradigm that solves for (GTG)-1 by assigning blocks to individual processing nodes for matrix decomposition update and scaling operations. We first find the Cholesky decomposition of GTG which is subsequently inverted. Next, we employ OOC matrix multiplication methods to calculate the model covariance matrix from (GTG)-1 and an assumed data covariance matrix. Given the model covariance matrix, we solve for the travel-time covariance associated with arbitrary ray-paths by summing the model covariance along both ray paths. Setting the paths equal and taking the square root yields the travel prediction uncertainty for the single path. JF - American Geophysical Union Fall Meeting AU - Hipp, J R AU - Ballard, S AU - Begnaud, M L AU - Encarnacao, A V AU - Young, C J AU - Phillips, W S AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S21B EP - 2693 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789749593?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Path-dependent+travel+time+prediction+variance+and+covariance+for+a+global+tomographic+P-+and+S-velocity+model&rft.au=Hipp%2C+J+R%3BBallard%2C+S%3BBegnaud%2C+M+L%3BEncarnacao%2C+A+V%3BYoung%2C+C+J%3BPhillips%2C+W+S%3BAnonymous&rft.aulast=Hipp&rft.aufirst=J&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Use of the fracture continuum model for numerical modeling of flow and transport of deep geologic disposal of nuclear waste in crystalline rock AN - 1789748070; 2016-045002 AB - Numerical modeling of disposal of nuclear waste in a deep geologic repository in fractured crystalline rock requires robust characterization of fractures. Various methods for fracture representation in granitic rocks exist. In this study we used the fracture continuum model (FCM) to characterize fractured rock for use in the simulation of flow and transport in the far field of a generic nuclear waste repository located at 500 m depth. The FCM approach is a stochastic method that maps the permeability of discrete fractures onto a regular grid. The method generates permeability fields using field observations of fracture sets. The original method described in McKenna and Reeves (2005) was designed for vertical fractures. The method has since then been extended to incorporate fully three-dimensional representations of anisotropic permeability, multiple independent fracture sets, and arbitrary fracture dips and orientations, and spatial correlation (Kalinina et al. 20012, 2014). For this study the numerical code PFLOTRAN (Lichtner et al., 2015) has been used to model flow and transport. PFLOTRAN solves a system of generally nonlinear partial differential equations describing multiphase, multicomponent and multiscale reactive flow and transport in porous materials. The code is designed to run on massively parallel computing architectures as well as workstations and laptops (e.g. Hammond et al., 2011). Benchmark tests were conducted to simulate flow and transport in a specified model domain. Distributions of fracture parameters were used to generate a selected number of realizations. For each realization, the FCM method was used to generate a permeability field of the fractured rock. The PFLOTRAN code was then used to simulate flow and transport in the domain. Simulation results and analysis are presented. The results indicate that the FCM approach is a viable method to model fractured crystalline rocks. The FCM is a computationally efficient way to generate realistic representation of complex fracture systems. This approach is of interest for nuclear waste disposal models applied over large domains. JF - American Geophysical Union Fall Meeting AU - Hadgu, T AU - Kalinina, E AU - Klise, K A AU - Wang, Y AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract T23B EP - 2938 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789748070?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Use+of+the+fracture+continuum+model+for+numerical+modeling+of+flow+and+transport+of+deep+geologic+disposal+of+nuclear+waste+in+crystalline+rock&rft.au=Hadgu%2C+T%3BKalinina%2C+E%3BKlise%2C+K+A%3BWang%2C+Y%3BAnonymous&rft.aulast=Hadgu&rft.aufirst=T&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Monitoring seasonal changes in permafrost using seismic interferometry AN - 1789747921; 2016-044771 AB - The effects of climate change in polar regions and their incorporation in global climate models has recently become an area of great interest. Permafrost holds entrapped greenhouse gases, e.g. CO2 and CH4, which are released to the atmosphere upon thawing, creating a positive feedback mechanism. Knowledge of seasonal changes in active layer thickness as well as long term degradation of permafrost is critical to the management of high latitude infrastructures, hazard mitigation, and increasing the accuracy of climate predictions. Methods for effectively imaging the spatial extent, depth, thickness, and discontinuous nature of permafrost over large areas are needed. Furthermore, continuous monitoring of permafrost over annual time scales would provide valuable insight into permafrost degradation. Seismic interferometry using ambient seismic noise has proven effective for recording velocity changes within the subsurface for a variety of applications, but has yet to be applied to permafrost studies. To this end, we deployed 7 Nanometrics Trillium posthole broadband seismometers within Poker Flat Research Range, located 30 miles north of Fairbanks, Alaska in a zone of discontinuous permafrost. Approximately 2 years worth of nearly continuous ambient noise data was collected. Using the python package MSNoise, relative changes in velocity were calculated. Results show high amounts of variability throughout the study period. General trends of negative relative velocity shifts can be seen between August and October followed by a positive relative velocity shift between November and February. Differences in relative velocity changes with both frequency and spatial location are also observed, suggesting this technique is sensitive to permafrost variation with depth and extent. Overall, short and long term changes in shallow subsurface velocity can be recovered using this method proposing seismic interferometry is a promising new technique for permafrost monitoring. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - James, S R AU - Knox, H A AU - Abbott, R E AU - Anonymous Y1 - 2015/12// PY - 2015 DA - December 2015 SP - Abstract S34B EP - 06 PB - American Geophysical Union, Washington, DC VL - 2015 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1789747921?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Monitoring+seasonal+changes+in+permafrost+using+seismic+interferometry&rft.au=James%2C+S+R%3BKnox%2C+H+A%3BAbbott%2C+R+E%3BAnonymous&rft.aulast=James&rft.aufirst=S&rft.date=2015-12-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2015 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Highly stable multi-anchored magnetic nanoparticles for optical imaging within biofilms. AN - 1708896928; 26291573 AB - Magnetic nanoparticles are the next tool in medical diagnoses and treatment in many different biomedical applications, including magnetic hyperthermia as alternative treatment for cancer and bacterial infections, as well as the disruption of biofilms. The colloidal stability of the magnetic nanoparticles in a biological environment is crucial for efficient delivery. A surface that can be easily modifiable can also improve the delivery and imaging properties of the magnetic nanoparticle by adding targeting and imaging moieties, providing a platform for additional modification. The strategy presented in this work includes multiple nitroDOPA anchors for robust binding to the surface tied to the same polymer backbone as multiple poly(ethylene oxide) chains for steric stability. This approach provides biocompatibility and enhanced stability in fetal bovine serum (FBS) and phosphate buffer saline (PBS). As a proof of concept, these polymer-particles complexes were then modified with a near infrared dye and utilized in characterizing the integration of magnetic nanoparticles in biofilms. The work presented in this manuscript describes the synthesis and characterization of a nontoxic platform for the labeling of near IR-dyes for bioimaging. JF - Journal of colloid and interface science AU - Stone, R C AU - Fellows, B D AU - Qi, B AU - Trebatoski, D AU - Jenkins, B AU - Raval, Y AU - Tzeng, T R AU - Bruce, T F AU - McNealy, T AU - Austin, M J AU - Monson, T C AU - Huber, D L AU - Mefford, O T AD - Clemson University, Department of Materials Science and Engineering and Center for Optical Materials Science and Engineering Technologies (COMSET), 91 Technology Drive, Anderson, SC 29625, USA. ; University of Wisconsin-Madison, Materials Science and Engineering, 1509 University Avenue, Madison, WI 53706, USA. ; Clemson University, Department of Biological Sciences, 132 Long Hall, Clemson, SC 29634, USA. ; Clemson University, Department of Biological Sciences, 132 Long Hall, Clemson, SC 29634, USA; Clemson University, Light Imaging Facility, 190 Collings Street, Clemson, SC 29634, USA. ; Clemson University, Department of Biological Sciences, 132 Long Hall, Clemson, SC 29634, USA; Clemson University Institute of Environmental Toxicology (CU-ENTOX), 509 Westinghouse Road, Pendleton, SC 29670, USA. ; Sandia National Laboratories, Albuquerque, NM 87185, USA. ; Clemson University, Department of Materials Science and Engineering and Center for Optical Materials Science and Engineering Technologies (COMSET), 91 Technology Drive, Anderson, SC 29625, USA; Clemson University Institute of Environmental Toxicology (CU-ENTOX), 509 Westinghouse Road, Pendleton, SC 29670, USA. Electronic address: mefford@clemson.edu. Y1 - 2015/12/01/ PY - 2015 DA - 2015 Dec 01 SP - 175 EP - 182 VL - 459 KW - Fluorescent Dyes KW - 0 KW - Polyethylene Glycols KW - 30IQX730WE KW - Dihydroxyphenylalanine KW - 63-84-3 KW - Index Medicus KW - NitroDOPA KW - Heterobifunctional KW - Fluorescence KW - Multi-anchored KW - Biofilms KW - Imaging KW - Polyethylene oxide KW - Click chemistry KW - Magnetic nanoparticles KW - Microscopy, Fluorescence KW - Animals KW - Cattle KW - Mice KW - Dihydroxyphenylalanine -- chemistry KW - Polyethylene Glycols -- chemistry KW - Legionella pneumophila -- cytology KW - Fluorescent Dyes -- chemistry KW - Legionella pneumophila -- physiology KW - Nanoparticles -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1708896928?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+colloid+and+interface+science&rft.atitle=Highly+stable+multi-anchored+magnetic+nanoparticles+for+optical+imaging+within+biofilms.&rft.au=Stone%2C+R+C%3BFellows%2C+B+D%3BQi%2C+B%3BTrebatoski%2C+D%3BJenkins%2C+B%3BRaval%2C+Y%3BTzeng%2C+T+R%3BBruce%2C+T+F%3BMcNealy%2C+T%3BAustin%2C+M+J%3BMonson%2C+T+C%3BHuber%2C+D+L%3BMefford%2C+O+T&rft.aulast=Stone&rft.aufirst=R&rft.date=2015-12-01&rft.volume=459&rft.issue=&rft.spage=175&rft.isbn=&rft.btitle=&rft.title=Journal+of+colloid+and+interface+science&rft.issn=1095-7103&rft_id=info:doi/10.1016%2Fj.jcis.2015.08.012 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-03-21 N1 - Date created - 2015-08-31 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1016/j.jcis.2015.08.012 ER - TY - CPAPER T1 - Evaluating Ebola Response Alternatives in the VA Healthcare System using a Computational Epidemiological Control Model T2 - 143rd American Public Health Association Annual Meeting and Exposition (APHA 2015) AN - 1731771174; 6365882 JF - 143rd American Public Health Association Annual Meeting and Exposition (APHA 2015) AU - Finley, Patrick AU - Beyeler, Walt AU - Mitchell, Michael AU - Kaslow, Richard AU - Martinello, Richard AU - Davey, Victoria Y1 - 2015/10/31/ PY - 2015 DA - 2015 Oct 31 KW - Health care KW - Viruses KW - Computer applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1731771174?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=143rd+American+Public+Health+Association+Annual+Meeting+and+Exposition+%28APHA+2015%29&rft.atitle=Evaluating+Ebola+Response+Alternatives+in+the+VA+Healthcare+System+using+a+Computational+Epidemiological+Control+Model&rft.au=Finley%2C+Patrick%3BBeyeler%2C+Walt%3BMitchell%2C+Michael%3BKaslow%2C+Richard%3BMartinello%2C+Richard%3BDavey%2C+Victoria&rft.aulast=Finley&rft.aufirst=Patrick&rft.date=2015-10-31&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=143rd+American+Public+Health+Association+Annual+Meeting+and+Exposition+%28APHA+2015%29&rft.issn=&rft_id=info:doi/ L2 - https://apha.confex.com/apha/143am/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-06 N1 - Last updated - 2015-11-09 ER - TY - JOUR T1 - An improved thermodynamic model for the complexation of trivalent actinides and lanthanide with oxalic acid valid to high ionic strength AN - 1769963705; 2016-018594 AB - The dissociation constants of oxalic acid (Ox), and the stability constants of Am (super 3+) , Cm (super 3+) and Eu (super 3+) with Ox (super 2-) have been determined at 25 degrees C, over a range of concentration varying from 0.1 to 6.60 m NaClO (sub 4) using potentiometric titration and extraction techniques, respectively. The experimental data support the formation of complexes, M(Ox) (sub n) (super 3-2n) , where (M = Am (super 3+) , Cm (super 3+) and Eu (super 3+) and n = 1 and 2). The dissociation constant and the stability constant values measured as a function of NaClO (sub 4) concentration were used to estimate the Pitzer parameters for the respective interactions of Am (super 3+) , Cm (super 3+) and Eu (super 3+) with Ox. Furthermore, the stability constants data of Am (super 3+) -Ox measured in NaClO (sub 4) and in NaCl solutions from the literature were simultaneously fitted in order to refine the existing actinide-oxalate complexation model that can be used universally in the safety assessment of radioactive waste disposal. The thermodynamic stability constant: log beta (super 0) (sub 101) = 6.30 + or - 0.06 and log beta (super 0) (sub 102) = 10.84 + or - 0.06 for Am (super 3+) was obtained by simultaneously fitting data in NaCl and NaClO (sub 4) media. Additionally, log beta (super 0) (sub 101) = 6.72 + or - 0.08 and log beta (super 0) (sub 102) = 11.05 + or - 0.09 for the Cm (super 3+) and log beta (super 0) (sub 101) = 6.67 + or - 0.08 and log beta (super 0) (sub 102) = 11.15 + or - 0.09 for the Eu (super 3+) were calculated by extrapolation of data to zero ionic strength in NaClO (sub 4) medium only. For all stability constants, the Pitzer model gives an excellent representation of the data using interaction parameters beta (super (0)) , beta (super (1)) , and C (super Phi ) determined in this work. The thermodynamic model developed in this work will be useful in accurately modeling the potential solubility of trivalent actinides and early lanthanides to ionic strength of 6.60 m in low temperature environments in the presence of Ox. The work is also applicable to the accurate modeling transport of rare earth elements in various environments under the surface conditions. Abstract Copyright (2015) Elsevier, B.V. JF - Chemical Geology AU - Thakur, Punam AU - Xiong, Yongliang AU - Borkowski, Marian Y1 - 2015/10/15/ PY - 2015 DA - 2015 Oct 15 SP - 7 EP - 17 PB - Elsevier, Amsterdam VL - 413 SN - 0009-2541, 0009-2541 KW - hazardous waste KW - isotopes KW - complexing KW - curium KW - radioactivity methods KW - radioactive waste KW - environmental management KW - laboratory studies KW - reactivity KW - radioactive isotopes KW - phase equilibria KW - carboxylic acids KW - valency KW - rare earths KW - europium KW - thermodynamic properties KW - pH KW - experimental studies KW - acids KW - oxalic acid KW - titration KW - pollutants KW - geophysical methods KW - pollution KW - models KW - organic compounds KW - organic acids KW - metals KW - mathematical methods KW - americium KW - waste disposal KW - actinides KW - accuracy KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769963705?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=An+improved+thermodynamic+model+for+the+complexation+of+trivalent+actinides+and+lanthanide+with+oxalic+acid+valid+to+high+ionic+strength&rft.au=Thakur%2C+Punam%3BXiong%2C+Yongliang%3BBorkowski%2C+Marian&rft.aulast=Thakur&rft.aufirst=Punam&rft.date=2015-10-15&rft.volume=413&rft.issue=&rft.spage=7&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2015.07.029 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 78 N1 - Document feature - illus. incl. 6 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-03-03 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - accuracy; acids; actinides; americium; carboxylic acids; complexing; curium; environmental management; europium; experimental studies; geophysical methods; hazardous waste; isotopes; laboratory studies; mathematical methods; metals; models; organic acids; organic compounds; oxalic acid; pH; phase equilibria; pollutants; pollution; radioactive isotopes; radioactive waste; radioactivity methods; rare earths; reactivity; thermodynamic properties; titration; valency; waste disposal DO - http://dx.doi.org/10.1016/j.chemgeo.2015.07.029 ER - TY - JOUR T1 - In situ characterization of silver nanoparticle synthesis in maltodextrin supramolecular structures AN - 1746882703; PQ0002318460 AB - The use of maltodextrin supramolecular structures (MD SMS) as a reducing agent and colloidal stabilizing agent for the synthesis of Ag nanoparticles (Ag NPs) identified three key points. First, the maltodextrin (MD) solutions are effective in the formation of well-dispersed Ag NPs utilizing alkaline solution conditions, with the resulting Ag NPs ranging in size from 5 to 50nm diameter. Second, in situ characterization by Raman spectroscopy and small angle X-ray scattering (SAXS) are consistent with initial nucleation of Ag NPs within the MD SMS up to a critical size of ca. 1nm, followed by a transition to more rapid growth by aggregation and fusion between MD SMS, similar to micelle aggregation reactions. Third, the stabilization of larger Ag NPs by adsorbed MD SMS is similar to hemi-micelle stabilization, and monomodal size distributions are proposed to relate to integer surface coverage of the Ag NPs. Conditions were identified for preparing Ag NPs with monomodal distributions centered at 30-35nm Ag NPs. JF - Colloids and Surfaces B: Biointerfaces AU - Bell, Nelson S AU - Dunphy, Darren R AU - Lambert, Timothy N AU - Lu, Ping AU - Boyle, Timothy J AD - Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185, United States Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 98 EP - 104 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 134 SN - 0927-7765, 0927-7765 KW - Biotechnology and Bioengineering Abstracts KW - Silver KW - Nanoparticles KW - Maltodextrin KW - Synthesis KW - In situ KW - Nucleation KW - Raman spectroscopy KW - Colloids KW - Micelles KW - Reducing agents KW - X-ray scattering KW - maltodextrin KW - nanoparticles KW - Size distribution KW - W 30965:Miscellaneous, Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1746882703?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Colloids+and+Surfaces+B%3A+Biointerfaces&rft.atitle=In+situ+characterization+of+silver+nanoparticle+synthesis+in+maltodextrin+supramolecular+structures&rft.au=Bell%2C+Nelson+S%3BDunphy%2C+Darren+R%3BLambert%2C+Timothy+N%3BLu%2C+Ping%3BBoyle%2C+Timothy+J&rft.aulast=Bell&rft.aufirst=Nelson&rft.date=2015-10-01&rft.volume=134&rft.issue=&rft.spage=98&rft.isbn=&rft.btitle=&rft.title=Colloids+and+Surfaces+B%3A+Biointerfaces&rft.issn=09277765&rft_id=info:doi/10.1016%2Fj.colsurfb.2015.06.030 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-12-01 N1 - Last updated - 2016-02-18 N1 - SubjectsTermNotLitGenreText - Nucleation; Raman spectroscopy; Colloids; Micelles; Reducing agents; X-ray scattering; maltodextrin; Silver; nanoparticles; Size distribution DO - http://dx.doi.org/10.1016/j.colsurfb.2015.06.030 ER - TY - JOUR T1 - Experimental determination of the reactivity of the Frio Sandstone, Texas, and the fate of heavy metals resulting from carbon dioxide sequestration AN - 1732832534; PQ0002074633 AB - Experiments were carried out at 100 bar pressure and 60 or 150 degree C in 0.7 m NaCl brine to characterize the reactivity of two Frio quartzofeldspathic sandstone compositions and to elucidate the fate of metals (Ba, Cr, Cu, Fe, Mn, Ni, Pb and Zn) in subsurface reservoirs targeted for carbon dioxide sequestration and storage. The solutions were either acidic (pH ~3) or near-neutral (pH ~8). In the former, acidity resulted from saturation with carbon dioxide (CO sub(2)) or by addition of HCl, and in the latter, the pH was attained by addition of NaHCO sub(3). A pair of experiments was conducted without CO sub(2) to trace the behavior of four dissolved metals (Cr, Ni, Pb and Zn) in circum-neutral solutions. The experiments were conducted in rocking autoclave reactors up to 67 days' time with solutions drawn periodically. Solution analyses indicated modest release of major elements from the starting materials to solution, even at 150 degree C. Geochemical modeling indicated supersaturation of the solutions with respect to a variety of Fe- and Mn-bearing phases. Scanning electron microscope (SEM) analyses of the powders both before and after experiments showed evidence for minor dissolution of alkali feldspar, quartz, plagioclase and clay minerals. No evidence for precipitated carbonate phases was found in the CO sub(2)-bearing experiments. In general, the concentrations of the metals were below their respective maximum contaminant levels (MCLs) by the end of the experiment, except for Ba, and for Cr and Pb in the experiment in which near-neutral conditions were imposed from the beginning. The data are consistent with metal removal from solution as the pH changes from acidic to neutral and SEM results identified Fe-oxides and sulfides as the likely sinks for Cu, Cr and Zn. The data indicate that even under extreme conditions the likelihood of metal concentrations in drinking water exceeding MCLs through accidental mixing with CO sub(2)-bearing solution is very low. JF - Environmental Earth Sciences AU - Icenhower, Jonathan P AU - Saldi, Giuseppe D AU - Daval, Damien AU - Knauss, Kevin G AD - Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA, jpicenh@sandia.gov Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 5501 EP - 5516 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 74 IS - 7 SN - 1866-6280, 1866-6280 KW - Environment Abstracts KW - Metals KW - Clay KW - Sandstone KW - Sulfides KW - Copper KW - Lead KW - ASW, USA, Texas KW - Carbon sequestration KW - Metal concentrations KW - Zinc KW - Drinking water KW - Acidity KW - Carbon dioxide KW - Reservoirs KW - pH KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732832534?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Earth+Sciences&rft.atitle=Experimental+determination+of+the+reactivity+of+the+Frio+Sandstone%2C+Texas%2C+and+the+fate+of+heavy+metals+resulting+from+carbon+dioxide+sequestration&rft.au=Icenhower%2C+Jonathan+P%3BSaldi%2C+Giuseppe+D%3BDaval%2C+Damien%3BKnauss%2C+Kevin+G&rft.aulast=Icenhower&rft.aufirst=Jonathan&rft.date=2015-10-01&rft.volume=74&rft.issue=7&rft.spage=5501&rft.isbn=&rft.btitle=&rft.title=Environmental+Earth+Sciences&rft.issn=18666280&rft_id=info:doi/10.1007%2Fs12665-015-4560-y LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Number of references - 29 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Metals; Clay; Sandstone; Sulfides; Copper; Lead; Carbon sequestration; Metal concentrations; Zinc; Carbon dioxide; Acidity; Drinking water; Reservoirs; pH; ASW, USA, Texas DO - http://dx.doi.org/10.1007/s12665-015-4560-y ER - TY - JOUR T1 - Assay for lignin breakdown based on lignin films: insights into the Fenton reaction with insoluble lignin AN - 1722179841; PQ0002114258 AB - We report a new assay for breakdown of high molecular weight, insoluble lignin based on lignin films. In this method, decrease in film thickness is detected upon solubilization of mass through either chemical alteration of the lignin or molecular weight reduction. The assay was performed with organosolv lignin, the only chemical modification being an oxidative pretreatment to provide film stability with respect to dissolution. The assay is sensitive to release of as little as 20 Aa of material from the film. A multiplexed format was developed using a silicone block in the form of a standard 96-well plate, allowing simultaneous assaying of a large number of reaction conditions. The assay was demonstrated using the Fenton reaction, revealing new insights into the physicochemical aspects of this reaction system with insoluble lignin. In particular, mass solubilized from the film was found to pass through a maximum as a function of the initial concentration of FeCl sub(2) ([FeCl sub(2)] sub(o)), with the maximum occurring at [FeCl sub(2)] sub(o) = 1 mM for [H sub(2)O sub(2)] sub(o) = 5%. At that condition, solubilization of mass occurs in two stages. The reaction produces mostly ring-opened products of mass greater than 700 g mol super(-1), along with a minority of low molecular weight aromatics. The new insight from this work is an important step toward optimizing this complex reaction system for effective lignin breakdown. JF - Green Chemistry AU - Kent, Michael S AU - Avina, Isaac C AU - Rader, Nadeya AU - Busse, Michael L AU - George, Anthe AU - Sathitsuksanoh, Noppadon AU - Baidoo, Edward AU - Timlin, Jerilyn AU - Giron, Nicholas H AU - Celina, Mathias C AU - Martin, Laura E AU - Polsky, Ronen AU - Chavez, Victor H AU - Huber, Dale L AU - Keasling, Jay D AU - Singh, Seema AU - Simmons, Blake A AU - Sale, Kenneth L AD - Joint BioEnergy Institute; Emeryville; CA 94608; USA; , mskent@sandia.gov Y1 - 2015/10// PY - 2015 DA - October 2015 SP - 4830 EP - 4845 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 17 IS - 10 SN - 1463-9262, 1463-9262 KW - Sustainability Science Abstracts KW - Silicones KW - Physicochemical properties KW - Green development KW - Assays KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722179841?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Green+Chemistry&rft.atitle=Assay+for+lignin+breakdown+based+on+lignin+films%3A+insights+into+the+Fenton+reaction+with+insoluble+lignin&rft.au=Kent%2C+Michael+S%3BAvina%2C+Isaac+C%3BRader%2C+Nadeya%3BBusse%2C+Michael+L%3BGeorge%2C+Anthe%3BSathitsuksanoh%2C+Noppadon%3BBaidoo%2C+Edward%3BTimlin%2C+Jerilyn%3BGiron%2C+Nicholas+H%3BCelina%2C+Mathias+C%3BMartin%2C+Laura+E%3BPolsky%2C+Ronen%3BChavez%2C+Victor+H%3BHuber%2C+Dale+L%3BKeasling%2C+Jay+D%3BSingh%2C+Seema%3BSimmons%2C+Blake+A%3BSale%2C+Kenneth+L&rft.aulast=Kent&rft.aufirst=Michael&rft.date=2015-10-01&rft.volume=17&rft.issue=10&rft.spage=4830&rft.isbn=&rft.btitle=&rft.title=Green+Chemistry&rft.issn=14639262&rft_id=info:doi/10.1039%2Fc5gc01083g LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-10-01 N1 - Number of references - 86 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Silicones; Green development; Physicochemical properties; Assays DO - http://dx.doi.org/10.1039/c5gc01083g ER - TY - JOUR T1 - Easy parallel screening of reagent stability, quality control, and metrology in solid phase peptide synthesis (SPPS) and peptide couplings for microarrays AN - 1722179422; PQ0002016838 AB - Evaluating the stability of coupling reagents, quality control (QC), and surface functionalization metrology are all critical to the production of high quality peptide microarrays. We describe a broadly applicable screening technique for evaluating the fidelity of solid phase peptide synthesis (SPPS), the stability of activation/coupling reagents, and a microarray surface metrology tool. This technique was used to assess the stability of the activation reagent 1-{[1-(Cyano-2-ethoxy-2-oxo-ethylidenaminooxy)dimethylamino-morpho l inomethylene]}methaneaminiumHexafluorophosphate (COMU) (Sigma-Aldrich, St. Louis, MO, USA) by SPPS of Leu-Enkephalin (YGGFL) or the coupling of commercially synthesized YGGFL peptides to (3-aminopropyl)triethyoxysilane-modified glass surfaces. Coupling efficiency was quantitated by fluorescence signaling based on immunoreactivity of the YGGFL motif. It was concluded that COMU solutions should be prepared fresh and used within 5h when stored at ~23 degree C and not beyond 24h if stored refrigerated, both in closed containers. Caveats to gauging COMU stability by absorption spectroscopy are discussed. Commercial YGGFL peptides needed independent QC, due to immunoreactivity variations for the same sequence synthesized by different vendors. This technique is useful in evaluating the stability of other activation/coupling reagents besides COMU and as a metrology tool for SPPS and peptide microarrays. Microwell plate-based absorption and fluorescence assays were developed to evaluate the quality and shelf life of peptide activation reagents in order to establish metrology during solid phase peptide synthesis, peptide couplings, and the building of peptide microarrays. JF - Journal of Peptide Science AU - Achyuthan, Komandoor E AU - Wheeler, David R AD - Biological/Chemical/Physical Microsensors Department, Sandia National Laboratories, 1515 Eubank Blvd, Albuquerque, NM, 87185, USA. Y1 - 2015/10// PY - 2015 DA - Oct 2015 SP - 751 EP - 757 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 21 IS - 10 SN - 1075-2617, 1075-2617 KW - Biotechnology and Bioengineering Abstracts KW - Fidelity KW - Absorption spectroscopy KW - Fluorescence KW - Quality control KW - Immunoreactivity KW - Peptide synthesis KW - Shelf life KW - Enkephalin (leucine) KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722179422?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Peptide+Science&rft.atitle=Easy+parallel+screening+of+reagent+stability%2C+quality+control%2C+and+metrology+in+solid+phase+peptide+synthesis+%28SPPS%29+and+peptide+couplings+for+microarrays&rft.au=Achyuthan%2C+Komandoor+E%3BWheeler%2C+David+R&rft.aulast=Achyuthan&rft.aufirst=Komandoor&rft.date=2015-10-01&rft.volume=21&rft.issue=10&rft.spage=751&rft.isbn=&rft.btitle=&rft.title=Journal+of+Peptide+Science&rft.issn=10752617&rft_id=info:doi/10.1002%2Fpsc.2806 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-10-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Absorption spectroscopy; Fidelity; Fluorescence; Quality control; Immunoreactivity; Shelf life; Peptide synthesis; Enkephalin (leucine) DO - http://dx.doi.org/10.1002/psc.2806 ER - TY - JOUR T1 - A new method for producing automated seismic bulletins; probabilistic event detection, association, and location AN - 1718054429; 2015-094184 AB - Given a set of observations within a specified time window, a fitness value is calculated at each grid node by summing station-specific conditional fitness values. Assuming each observation was generated by a refracted P wave, these values are proportional to the conditional probabilities that each observation was generated by a seismic event at the grid node. The node with highest fitness value is accepted as a hypothetical event location, subject to some minimal fitness value, and all arrivals within a longer time window consistent with that event are associated with it. During the association step, a variety of different phases are considered. Once associated with an event, an arrival is removed from further consideration. While unassociated arrivals remain, the search for other events is repeated until none are identified.Results are presented in comparison with analyst-reviewed bulletins for three datasets: a two-week ground-truth period, the Tohoku aftershock sequence, and the entire year of 2010. The probabilistic event detection, association, and location algorithm missed fewer events and generated fewer false events on all datasets compared to the associator used at the International Data Center (51% fewer missed and 52% fewer false events on the ground-truth dataset when using the same predictions). JF - Bulletin of the Seismological Society of America AU - Draelos, Timothy J AU - Ballard, Sanford AU - Young, Christopher J AU - Brogan, Ronald Y1 - 2015/09/08/ PY - 2015 DA - 2015 Sep 08 SP - 2453 EP - 2467 PB - Seismological Society of America, Berkeley, CA VL - 105 IS - 5 SN - 0037-1106, 0037-1106 KW - technology KW - monitoring KW - geologic hazards KW - explosions KW - global KW - statistical analysis KW - detection KW - ground truth KW - seismicity KW - earthquake prediction KW - seismic risk KW - natural hazards KW - risk assessment KW - probability KW - focus KW - algorithms KW - nuclear explosions KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1718054429?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=A+new+method+for+producing+automated+seismic+bulletins%3B+probabilistic+event+detection%2C+association%2C+and+location&rft.au=Draelos%2C+Timothy+J%3BBallard%2C+Sanford%3BYoung%2C+Christopher+J%3BBrogan%2C+Ronald&rft.aulast=Draelos&rft.aufirst=Timothy&rft.date=2015-09-08&rft.volume=105&rft.issue=5&rft.spage=2453&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120150099 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 15 N1 - PubXState - CA N1 - Document feature - illus. N1 - Last updated - 2015-12-17 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; detection; earthquake prediction; earthquakes; explosions; focus; geologic hazards; global; ground truth; monitoring; natural hazards; nuclear explosions; probability; risk assessment; seismic risk; seismicity; statistical analysis; technology DO - http://dx.doi.org/10.1785/0120150099 ER - TY - JOUR T1 - Iodide uptake by negatively charged clay interlayers? AN - 1777468897; 2016-027580 AB - Understanding iodide interactions with clay minerals is critical to quantifying risk associated with nuclear waste disposal. Current thought assumes that iodide does not interact directly with clay minerals due to electrical repulsion between the iodide and the negatively charged clay layers. However, a growing body of work indicates a weak interaction between iodide and clays. The goal of this contribution is to report a conceptual model for iodide interaction with clays by considering clay mineral structures and emergent behaviors of chemical species in confined spaces. To approach the problem, a suite of clay minerals was used with varying degrees of isomorphic substitution, chemical composition, and mineral structure. Iodide uptake experiments were completed with each of these minerals in a range of swamping electrolyte identities (NaCl, NaBr, KCl) and concentrations. Iodide uptake behaviors form distinct trends with cation exchange capacity and mineral structure. These trends change substantially with electrolyte composition and concentration, but do not appear to be affected by solution pH. The experimental results suggest that iodide may directly interact with clays by forming ion-pairs (e.g., NaI (sub (aq)) ) which may concentrate within the interlayer space as well as the thin areas surrounding the clay particle where water behavior is more structured relative to bulk water. Ion pairing and iodide concentration in these zones is probably driven by the reduced dielectric constant of water in confined space and by the relatively high polarizability of the iodide species. Abstract Copyright (2015) Elsevier, B.V. JF - Journal of Environmental Radioactivity AU - Miller, Andrew AU - Kruichak, Jessica AU - Mills, Melissa AU - Wang, Yifeng Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 108 EP - 114 PB - Elsevier, Oxford VL - 147 SN - 0265-931X, 0265-931X KW - silicates KW - hazardous waste KW - halides KW - sorption KW - X-ray diffraction data KW - isotopes KW - halogens KW - mass spectra KW - radioactive waste KW - iodine KW - radioactive isotopes KW - isomorphism KW - spectra KW - mineral assemblages KW - water pollution KW - pH KW - montmorillonite KW - experimental studies KW - iodides KW - pollutants KW - pollution KW - electrolytes KW - clay minerals KW - ICP mass spectra KW - ion chromatograms KW - soil pollution KW - chromatograms KW - theoretical models KW - sheet silicates KW - waste disposal KW - crystal chemistry KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777468897?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Environmental+Radioactivity&rft.atitle=Iodide+uptake+by+negatively+charged+clay+interlayers%3F&rft.au=Miller%2C+Andrew%3BKruichak%2C+Jessica%3BMills%2C+Melissa%3BWang%2C+Yifeng&rft.aulast=Miller&rft.aufirst=Andrew&rft.date=2015-09-01&rft.volume=147&rft.issue=&rft.spage=108&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Radioactivity&rft.issn=0265931X&rft_id=info:doi/10.1016%2Fj.jenvrad.2015.05.024 L2 - http://www.sciencedirect.com/science/journal/0265931X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 51 N1 - Document feature - illus. incl. 5 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2016-04-01 N1 - SubjectsTermNotLitGenreText - chromatograms; clay minerals; crystal chemistry; electrolytes; experimental studies; halides; halogens; hazardous waste; ICP mass spectra; iodides; iodine; ion chromatograms; isomorphism; isotopes; mass spectra; mineral assemblages; montmorillonite; pH; pollutants; pollution; radioactive isotopes; radioactive waste; sheet silicates; silicates; soil pollution; sorption; spectra; theoretical models; waste disposal; water pollution; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.jenvrad.2015.05.024 ER - TY - JOUR T1 - Experimental determination of single-crystal halite thermal conductivity, diffusivity and specific heat from -75 degrees C to 300 degrees C AN - 1734270194; 2015-112754 JF - International Journal of Rock Mechanics and Mining Sciences (1997) AU - Urquhart, Alexander AU - Bauer, Stephen Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 350 EP - 352 PB - Elsevier, Oxford-New York VL - 78 SN - 1365-1609, 1365-1609 KW - halides KW - thermal conductivity KW - engineering properties KW - microcracks KW - specific heat KW - mathematical models KW - halite KW - rock mechanics KW - radioactive waste KW - cracks KW - heat flow KW - chlorides KW - thermomechanical properties KW - waste disposal KW - underground disposal KW - diffusivity KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734270194?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Rock+Mechanics+and+Mining+Sciences+%281997%29&rft.atitle=Experimental+determination+of+single-crystal+halite+thermal+conductivity%2C+diffusivity+and+specific+heat+from+-75+degrees+C+to+300+degrees+C&rft.au=Urquhart%2C+Alexander%3BBauer%2C+Stephen&rft.aulast=Urquhart&rft.aufirst=Alexander&rft.date=2015-09-01&rft.volume=78&rft.issue=&rft.spage=350&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Rock+Mechanics+and+Mining+Sciences+%281997%29&rft.issn=13651609&rft_id=info:doi/10.1016%2Fj.ijrmms.2015.04.007 L2 - http://www.sciencedirect.com/science/journal/13651609 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 9 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-11-19 N1 - CODEN - IJRMA2 N1 - SubjectsTermNotLitGenreText - chlorides; cracks; diffusivity; engineering properties; halides; halite; heat flow; mathematical models; microcracks; radioactive waste; rock mechanics; specific heat; thermal conductivity; thermomechanical properties; underground disposal; waste disposal DO - http://dx.doi.org/10.1016/j.ijrmms.2015.04.007 ER - TY - JOUR T1 - Impact of Pretreatment Technologies on Saccharification and Isopentenol Fermentation of Mixed Lignocellulosic Feedstocks AN - 1722176777; PQ0002073332 AB - In order to enable the large-scale production of biofuels or chemicals from lignocellulosic biomass, a consistent and affordable year-round supply of lignocellulosic feedstocks is essential. Feedstock blending and/or densification offers one promising solution to overcome current challenges on biomass supply, i.e., low energy and bulk densities and significant compositional variations. Therefore, it is imperative to develop conversion technologies that can process mixed pelleted biomass feedstocks with minimal negative impact in terms of overall performance of the relevant biorefinery unit operations: pretreatment, fermentable sugar production, and fuel titers. We processed the mixture of four feedstocks-corn stover, switchgrass, lodgepole pine, and eucalyptus (1:1:1:1 on dry weight basis)-in flour and pellet form using ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate, dilute sulfuric acid (DA), and soaking in aqueous ammonia (SAA) pretreatments. Commercial enzyme mixtures, including cellulases and hemicellulases, were then applied to these pretreated feedstocks at low to moderate enzyme loadings to determine hydrolysis efficiency. Results show significant variations on the chemical composition, crystallinity, and enzymatic digestibility of the pretreated feedstocks across the different pretreatment technologies studied. The advanced biofuel isopentenol was produced during simultaneous saccharification and fermentation (SSF) of pretreated feedstocks using an engineered Escherichia coli strain. Results show that IL pretreatment liberates the most sugar during enzymatic saccharification, and in turn led to the highest isopentenol titer as compared to DA and SAA pretreatments. This study provides insights on developing biorefinery technologies that produce advanced biofuels based on mixed feedstock streams. JF - BioEnergy Research AU - Shi, Jian AU - George, Kevin W AU - Sun, Ning AU - He, Wei AU - Li, Chenlin AU - Stavila, Vitalie AU - Keasling, Jay D AU - Simmons, Blake A AU - Lee, Taek Soon AU - Singh, Seema AD - Joint BioEnergy Institute, 5885 Hollis St, Emeryville, CA, 94608, USA, seesing@sandia.gov Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 1004 EP - 1013 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 8 IS - 3 SN - 1939-1234, 1939-1234 KW - Biotechnology and Bioengineering Abstracts; Environment Abstracts KW - Chemicals KW - Fuel technology KW - Crystallinity KW - Fermentation KW - Fuels KW - Streams KW - Cellulase KW - Eucalyptus KW - Dopamine KW - Escherichia coli KW - Sulfuric acid KW - Flour KW - Sugar KW - Chemical composition KW - Ammonia KW - Enzymes KW - Biomass KW - Acetic acid KW - Hydrolysis KW - Energy KW - Digestibility KW - Biofuels KW - Technology KW - ENA 03:Energy KW - W 30945:Fermentation & Cell Culture UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722176777?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=BioEnergy+Research&rft.atitle=Impact+of+Pretreatment+Technologies+on+Saccharification+and+Isopentenol+Fermentation+of+Mixed+Lignocellulosic+Feedstocks&rft.au=Shi%2C+Jian%3BGeorge%2C+Kevin+W%3BSun%2C+Ning%3BHe%2C+Wei%3BLi%2C+Chenlin%3BStavila%2C+Vitalie%3BKeasling%2C+Jay+D%3BSimmons%2C+Blake+A%3BLee%2C+Taek+Soon%3BSingh%2C+Seema&rft.aulast=Shi&rft.aufirst=Jian&rft.date=2015-09-01&rft.volume=8&rft.issue=3&rft.spage=1004&rft.isbn=&rft.btitle=&rft.title=BioEnergy+Research&rft.issn=19391234&rft_id=info:doi/10.1007%2Fs12155-015-9588-z LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-10-01 N1 - Number of references - 38 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Sugar; Crystallinity; Fermentation; Fuels; Ammonia; Enzymes; Biomass; Streams; Hydrolysis; Acetic acid; Cellulase; Dopamine; Energy; Digestibility; Sulfuric acid; Biofuels; Flour; Chemicals; Fuel technology; Chemical composition; Technology; Escherichia coli; Eucalyptus DO - http://dx.doi.org/10.1007/s12155-015-9588-z ER - TY - JOUR T1 - Empirical Kinetics and Their Role in Elucidating the Utility of Transition-State Theory to Mineral-Water Reactions: A comment upon, "Evidence and Potential Implications of Exponential Tails to Concentration Versus Time Plots for the Batch Dissolution of Calcite" by V. W. Truesdale AN - 1712768414; PQ0001923132 AB - Transition-state theory (TST) is a successful theory for understanding many different types of reactions, but its application to mineral-water systems has not been successful, especially as the system approaches saturation with respect to a rate-limiting phase. A number of investigators have proposed alternate frameworks for using the kinetic rate data to construct models of dissolution, including Truesdale (Aquat Geochem, 2015; this issue). This alternate approach has been resisted, in spite of self-evident discrepancies between TST expectations and the data. The failure of TST under certain circumstances is a result of the presence of metastable intermediaries or reaction layers that form on the surface of reacting solids, and these phenomena are not anticipated by the current theory. Therefore, alternate approaches, such as the shrinking object model advocated by Truesdale, represent a potentially important avenue for advancing the science of dissolution kinetics. JF - Aquatic Geochemistry AU - Icenhower, Jonathan P AD - Sandia National Laboratories, Carlsbad, 4100 National Parks Highway, Carlsbad, NM, 88220, USA, jpicenh@sandia.gov Y1 - 2015/09// PY - 2015 DA - September 2015 SP - 397 EP - 405 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 21 IS - 5 SN - 1380-6165, 1380-6165 KW - Aqualine Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts KW - Geochemistry KW - Calcite KW - Solids KW - Saturation KW - Utilities KW - Model Studies KW - Kinetics KW - AQ 00001:Water Resources and Supplies KW - SW 0880:Chemical processes KW - Q2 09404:Minerals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1712768414?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Aquatic+Geochemistry&rft.atitle=Empirical+Kinetics+and+Their+Role+in+Elucidating+the+Utility+of+Transition-State+Theory+to+Mineral-Water+Reactions%3A+A+comment+upon%2C+%22Evidence+and+Potential+Implications+of+Exponential+Tails+to+Concentration+Versus+Time+Plots+for+the+Batch+Dissolution+of+Calcite%22+by+V.+W.+Truesdale&rft.au=Icenhower%2C+Jonathan+P&rft.aulast=Icenhower&rft.aufirst=Jonathan&rft.date=2015-09-01&rft.volume=21&rft.issue=5&rft.spage=397&rft.isbn=&rft.btitle=&rft.title=Aquatic+Geochemistry&rft.issn=13806165&rft_id=info:doi/10.1007%2Fs10498-015-9266-y LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Number of references - 30 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Calcite; Kinetics; Geochemistry; Solids; Saturation; Utilities; Model Studies DO - http://dx.doi.org/10.1007/s10498-015-9266-y ER - TY - JOUR T1 - Can argillaceous formations isolate nuclear waste? Insights from isotopic, noble gas, and geochemical profiles AN - 1873350782; 2017-012760 AB - There is considerable interest in the use of thick argillaceous geologic formations to contain nuclear waste. Here, we show that diffusion can be the controlling transport process in these formations and diffusional time scales for delta (super 18) O and delta (super 2) H in water, dissolved He, and Cl transport in shale-dominated aquitards are typically over 10 (super 6) years, well exceeding the regulatory requirements for isolation in most countries. Our scientific understanding of diffusive solute transport processes through argillaceous formations would benefit from the application of additional isotopic tracers (e.g., using new (super 4) He sampling technology), multidimensional diffusive-dispersive modeling of groundwater flow and diffusive-dispersive solute transport over long geologic time scales, and an improved understanding of spatial heterogeneity as well as time-dependent changes in the subsurface conditions and properties of argillaceous formations in response to events such as glaciation. Based on our current isotopic and geochemical understanding of transport, we argue that argillaceous formations can provide favorable long-term conditions for isolating nuclear wastes. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - Geofluids (Oxford) AU - Hendry, M J AU - Solomon, D K AU - Person, M AU - Wassenaar, L I AU - Gardner, W P AU - Clark, I D AU - Mayer, K U AU - Kunimaru, T AU - Nakata, K AU - Hasegawa, T Y1 - 2015/08// PY - 2015 DA - August 2015 SP - 381 EP - 386 PB - Wiley-Blackwell, Oxford VL - 15 IS - 3 SN - 1468-8115, 1468-8115 KW - solute transport KW - oxygen KW - isotopes KW - halogens KW - stable isotopes KW - radioactive waste KW - ground water KW - sedimentary rocks KW - transport KW - noble gases KW - tracers KW - helium KW - heterogeneity KW - argillaceous texture KW - water KW - chlorine KW - diffusion KW - textures KW - shale KW - isotope ratios KW - fluid flow KW - O-18/O-16 KW - aquitards KW - models KW - claystone KW - D/H KW - hydrogen KW - waste disposal KW - clastic rocks KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1873350782?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geofluids+%28Oxford%29&rft.atitle=Can+argillaceous+formations+isolate+nuclear+waste%3F+Insights+from+isotopic%2C+noble+gas%2C+and+geochemical+profiles&rft.au=Hendry%2C+M+J%3BSolomon%2C+D+K%3BPerson%2C+M%3BWassenaar%2C+L+I%3BGardner%2C+W+P%3BClark%2C+I+D%3BMayer%2C+K+U%3BKunimaru%2C+T%3BNakata%2C+K%3BHasegawa%2C+T&rft.aulast=Hendry&rft.aufirst=M&rft.date=2015-08-01&rft.volume=15&rft.issue=3&rft.spage=381&rft.isbn=&rft.btitle=&rft.title=Geofluids+%28Oxford%29&rft.issn=14688115&rft_id=info:doi/10.1111%2Fgfl.12132 L2 - http://www.blackwellpublishing.com/journal.asp?ref=1468-8115 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2017-01-01 N1 - Number of references - 36 N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2017-03-02 N1 - SubjectsTermNotLitGenreText - aquitards; argillaceous texture; chlorine; clastic rocks; claystone; D/H; diffusion; fluid flow; ground water; halogens; helium; heterogeneity; hydrogen; isotope ratios; isotopes; models; noble gases; O-18/O-16; oxygen; radioactive waste; sedimentary rocks; shale; solute transport; stable isotopes; textures; tracers; transport; waste disposal; water DO - http://dx.doi.org/10.1111/gfl.12132 ER - TY - JOUR T1 - Can argillaceous formations isolate nuclear waste? Insights from isotopic, noble gas, and geochemical profiles AN - 1832626147; 756366-1 AB - There is considerable interest in the use of thick argillaceous geologic formations to contain nuclear waste. Here, we show that diffusion can be the controlling transport process in these formations and diffusional time scales for delta (super 18) O and delta (super 2) H in water, dissolved He, and Cl transport in shale-dominated aquitards are typically over 10 (super 6) years, well exceeding the regulatory requirements for isolation in most countries. Our scientific understanding of diffusive solute transport processes through argillaceous formations would benefit from the application of additional isotopic tracers (e.g., using new (super 4) He sampling technology), multidimensional diffusive-dispersive modeling of groundwater flow and diffusive-dispersive solute transport over long geologic time scales, and an improved understanding of spatial heterogeneity as well as time-dependent changes in the subsurface conditions and properties of argillaceous formations in response to events such as glaciation. Based on our current isotopic and geochemical understanding of transport, we argue that argillaceous formations can provide favorable long-term conditions for isolating nuclear wastes. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - Geofluids (Oxford) AU - Hendry, M J AU - Solomon, D K AU - Person, M AU - Wassenaar, L I AU - Gardner, W P AU - Clark, I D AU - Mayer, K U AU - Kunimaru, T AU - Nakata, K AU - Hasegawa, T Y1 - 2015/08// PY - 2015 DA - August 2015 SP - 381 EP - 386 PB - Wiley-Blackwell, Oxford VL - 15 IS - 3 SN - 1468-8115, 1468-8115 KW - solute transport KW - oxygen KW - isotopes KW - halogens KW - stable isotopes KW - radioactive waste KW - ground water KW - sedimentary rocks KW - transport KW - noble gases KW - tracers KW - helium KW - heterogeneity KW - argillaceous texture KW - water KW - chlorine KW - diffusion KW - textures KW - shale KW - isotope ratios KW - fluid flow KW - O-18/O-16 KW - aquitards KW - models KW - D/H KW - hydrogen KW - waste disposal KW - clastic rocks KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832626147?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geofluids+%28Oxford%29&rft.atitle=Can+argillaceous+formations+isolate+nuclear+waste%3F+Insights+from+isotopic%2C+noble+gas%2C+and+geochemical+profiles&rft.au=Hendry%2C+M+J%3BSolomon%2C+D+K%3BPerson%2C+M%3BWassenaar%2C+L+I%3BGardner%2C+W+P%3BClark%2C+I+D%3BMayer%2C+K+U%3BKunimaru%2C+T%3BNakata%2C+K%3BHasegawa%2C+T&rft.aulast=Hendry&rft.aufirst=M&rft.date=2015-08-01&rft.volume=15&rft.issue=3&rft.spage=381&rft.isbn=&rft.btitle=&rft.title=Geofluids+%28Oxford%29&rft.issn=14688115&rft_id=info:doi/10.1111%2Fgfl.12132 L2 - http://www.blackwellpublishing.com/journal.asp?ref=1468-8115 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Number of references - 36 N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - aquitards; argillaceous texture; chlorine; clastic rocks; D/H; diffusion; fluid flow; ground water; halogens; helium; heterogeneity; hydrogen; isotope ratios; isotopes; models; noble gases; O-18/O-16; oxygen; radioactive waste; sedimentary rocks; shale; solute transport; stable isotopes; textures; tracers; transport; waste disposal; water DO - http://dx.doi.org/10.1111/gfl.12132 ER - TY - JOUR T1 - Spray-Dried Multiscale Nano-biocomposites Containing Living Cells. AN - 1700103712; 26083188 AB - Three-dimensional encapsulation of cells within nanostructured silica gels or matrices enables applications as diverse as biosensors, microbial fuel cells, artificial organs, and vaccines; it also allows the study of individual cell behaviors. Recent progress has improved the performance and flexibility of cellular encapsulation, yet there remains a need for robust scalable processes. Here, we report a spray-drying process enabling the large-scale production of functional nano-biocomposites (NBCs) containing living cells within ordered 3D lipid-silica nanostructures. The spray-drying process is demonstrated to work with multiple cell types and results in dry powders exhibiting a unique combination of properties including highly ordered 3D nanostructure, extended lipid fluidity, tunable macromorphologies and aerodynamic diameters, and unexpectedly high physical strength. Nanoindentation of the encasing nanostructure revealed a Young's modulus and hardness of 13 and 1.4 GPa, respectively. We hypothesized this high strength would prevent cell growth and force bacteria into viable but not culturable (VBNC) states. In concordance with the VBNC state, cellular ATP levels remained elevated even over eight months. However, their ability to undergo resuscitation and enter growth phase greatly decreased with time in the VBNC state. A quantitative method of determining resuscitation frequencies was developed and showed that, after 36 weeks in a NBC-induced VBNC, less than 1 in 10,000 cells underwent resuscitation. The NBC platform production of large quantities of VBNC cells is of interest for research in bacterial persistence and screening of drugs targeting such cells. NBCs may also enable long-term preservation of living cells for applications in cell-based sensing and the packaging and delivery of live-cell vaccines. JF - ACS nano AU - Johnson, Patrick E AU - Muttil, Pavan AU - MacKenzie, Debra AU - Carnes, Eric C AU - Pelowitz, Jennifer AU - Mara, Nathan A AU - Mook, William M AU - Jett, Stephen D AU - Dunphy, Darren R AU - Timmins, Graham S AU - Brinker, C Jeffrey AD - #Advanced Materials Laboratory, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States. Y1 - 2015/07/28/ PY - 2015 DA - 2015 Jul 28 SP - 6961 EP - 6977 VL - 9 IS - 7 KW - Lipids KW - 0 KW - Powders KW - Silicon Dioxide KW - 7631-86-9 KW - Adenosine Triphosphate KW - 8L70Q75FXE KW - Index Medicus KW - cellular KW - spray drying KW - evaporation-induced self-assembly KW - sol−gel KW - viable-but-not-culturable cells KW - biopreservation KW - bacterial persistence KW - encapsulation KW - Elastic Modulus KW - Lipids -- chemistry KW - Adenosine Triphosphate -- metabolism KW - Powders -- chemistry KW - Bacterial Capsules -- physiology KW - Silicon Dioxide -- chemistry KW - Escherichia coli -- metabolism KW - Desiccation -- methods KW - Nanostructures -- chemistry KW - Preservation, Biological -- methods KW - Escherichia coli -- physiology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1700103712?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+nano&rft.atitle=Spray-Dried+Multiscale+Nano-biocomposites+Containing+Living+Cells.&rft.au=Johnson%2C+Patrick+E%3BMuttil%2C+Pavan%3BMacKenzie%2C+Debra%3BCarnes%2C+Eric+C%3BPelowitz%2C+Jennifer%3BMara%2C+Nathan+A%3BMook%2C+William+M%3BJett%2C+Stephen+D%3BDunphy%2C+Darren+R%3BTimmins%2C+Graham+S%3BBrinker%2C+C+Jeffrey&rft.aulast=Johnson&rft.aufirst=Patrick&rft.date=2015-07-28&rft.volume=9&rft.issue=7&rft.spage=6961&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/10.1021%2Facsnano.5b01139 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-06-26 N1 - Date created - 2015-07-28 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acsnano.5b01139 ER - TY - JOUR T1 - Transcriptomic Analysis of Yersinia enterocolitica Biovar 1B Infecting Murine Macrophages Reveals New Mechanisms of Extracellular and Intracellular Survival AN - 1701493018; PQ0001784777 AB - Yersinia enterocolitica is typically considered an extracellular pathogen; however, during the course of an infection, a significant number of bacteria are stably maintained within host cell vacuoles. Little is known about this population and the role it plays during an infection. To address this question and to elucidate the spatially and temporally dynamic gene expression patterns of Y. enterocolitica biovar 1B through the course of an in vitro infection, transcriptome sequencing and differential gene expression analysis of bacteria infecting murine macrophage cells were performed under four distinct conditions. Bacteria were first grown in a nutrient-rich medium at 26 degree C to establish a baseline of gene expression that is unrelated to infection. The transcriptomes of these bacteria were then compared to bacteria grown in a conditioned cell culture medium at 37 degree C to identify genes that were differentially expressed in response to the increased temperature and medium but not in response to host cells. Infections were then performed, and the transcriptomes of bacteria found on the extracellular surface and intracellular compartments were analyzed individually. The upregulated genes revealed potential roles for a variety of systems in promoting intracellular virulence, including the Ysa type III secretion system, the Yts2 type II secretion system, and the Tad pilus. It was further determined that mutants of each of these systems had decreased virulence while infecting macrophages. Overall, these results reveal the complete set of genes expressed by Y. enterocolitica in response to infection and provide the groundwork for future virulence studies. JF - Infection and Immunity AU - Bent, Zachary W AU - Poorey, Kunal AU - Brazel, David M AU - LaBauve, Annette E AU - Sinha, Anupama AU - Curtis, Deanna J AU - House, Samantha E AU - Tew, Karen E AU - Hamblin, Rachelle Y AU - Williams, Kelly P AD - Department of Systems Biology, Sandia National Laboratories, Livermore, California, USA, rmeaghe@sandia.gov. Y1 - 2015/07// PY - 2015 DA - Jul 2015 SP - 2672 EP - 2685 PB - American Society for Microbiology, 1752 N Street N.W. Washington, DC 20036 United States VL - 83 IS - 7 SN - 0019-9567, 0019-9567 KW - Microbiology Abstracts B: Bacteriology; Immunology Abstracts KW - Gene expression KW - Virulence KW - Macrophages KW - Cell survival KW - Temperature effects KW - Vacuoles KW - Yersinia enterocolitica KW - Cell culture KW - Pathogens KW - Infection KW - J 02350:Immunology KW - F 06910:Microorganisms & Parasites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701493018?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Infection+and+Immunity&rft.atitle=Transcriptomic+Analysis+of+Yersinia+enterocolitica+Biovar+1B+Infecting+Murine+Macrophages+Reveals+New+Mechanisms+of+Extracellular+and+Intracellular+Survival&rft.au=Bent%2C+Zachary+W%3BPoorey%2C+Kunal%3BBrazel%2C+David+M%3BLaBauve%2C+Annette+E%3BSinha%2C+Anupama%3BCurtis%2C+Deanna+J%3BHouse%2C+Samantha+E%3BTew%2C+Karen+E%3BHamblin%2C+Rachelle+Y%3BWilliams%2C+Kelly+P&rft.aulast=Bent&rft.aufirst=Zachary&rft.date=2015-07-01&rft.volume=83&rft.issue=7&rft.spage=2672&rft.isbn=&rft.btitle=&rft.title=Infection+and+Immunity&rft.issn=00199567&rft_id=info:doi/10.1128%2FIAI.02922-14 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Number of references - 78 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Temperature effects; Cell survival; Macrophages; Virulence; Gene expression; Vacuoles; Cell culture; Pathogens; Infection; Yersinia enterocolitica DO - http://dx.doi.org/10.1128/IAI.02922-14 ER - TY - JOUR T1 - Quadrature Methods for the Calculation of Subgrid Microphysics Moments AN - 1701477118; PQ0001758363 AB - Many cloud microphysical processes occur on a much smaller scale than a typical numerical grid box can resolve. In such cases, a probability density function (PDF) can act as a proxy for subgrid variability in these microphysical processes. This method is known as the assumed PDF method. By placing a density on the microphysical fields, one can use samples from this density to estimate microphysics averages. In the assumed PDF method, the calculation of such microphysical averages has primarily been done using classical Monte Carlo methods and Latin hypercube sampling. Although these techniques are fairly easy to implement and ubiquitous in the literature, they suffer from slow convergence rates as a function of the number of samples. This paper proposes using deterministic quadrature methods instead of traditional random sampling approaches to compute the microphysics statistical moments for the assumed PDF method. For smooth functions, the quadrature-based methods can achieve much greater accuracy with fewer samples by choosing tailored quadrature points and weights instead of random samples. Moreover, these techniques are fairly easy to implement and conceptually similar to Monte Carlo-type methods. As a prototypical microphysical formula, Khairoutdinov and Kogan's autoconversion and accretion formulas are used to illustrate the benefit of using quadrature instead of Monte Carlo or Latin hypercube sampling. JF - Monthly Weather Review AU - Chowdhary, K AU - Salloum, M AU - Debusschere, B AU - Larson, V E AD - Sandia National Laboratories, Livermore, California Y1 - 2015/07// PY - 2015 DA - July 2015 SP - 2955 EP - 2972 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 143 IS - 7 SN - 0027-0644, 0027-0644 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - Cloud microphysics KW - Statistical techniques KW - Statistics KW - Cloud parameterizations KW - Weather KW - Variability KW - Density KW - Statistical sampling KW - Statistical analysis KW - Monte Carlo method KW - Probability density function KW - Monte Carlo Method KW - Methodology KW - Clouds KW - Accretion KW - Convergence KW - Reviews KW - Sampling KW - Benefits KW - Q2 09242:Observations and measurements at sea KW - SW 0810:General KW - M2 551.576:Clouds (551.576) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701477118?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Monthly+Weather+Review&rft.atitle=Quadrature+Methods+for+the+Calculation+of+Subgrid+Microphysics+Moments&rft.au=Chowdhary%2C+K%3BSalloum%2C+M%3BDebusschere%2C+B%3BLarson%2C+V+E&rft.aulast=Chowdhary&rft.aufirst=K&rft.date=2015-07-01&rft.volume=143&rft.issue=7&rft.spage=2955&rft.isbn=&rft.btitle=&rft.title=Monthly+Weather+Review&rft.issn=00270644&rft_id=info:doi/10.1175%2FMWR-D-14-00168.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Number of references - 54 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Accretion; Statistical sampling; Statistical analysis; Methodology; Clouds; Convergence; Monte Carlo method; Probability density function; Weather; Variability; Reviews; Density; Sampling; Monte Carlo Method; Benefits DO - http://dx.doi.org/10.1175/MWR-D-14-00168.1 ER - TY - JOUR T1 - Structural color printing based on plasmonic metasurfaces of perfect light absorption. AN - 1686999822; 26047486 AB - Subwavelength structural color filtering and printing technologies employing plasmonic nanostructures have recently been recognized as an important and beneficial complement to the traditional colorant-based pigmentation. However, the color saturation, brightness and incident angle tolerance of structural color printing need to be improved to meet the application requirement. Here we demonstrate a structural color printing method based on plasmonic metasurfaces of perfect light absorption to improve color performances such as saturation and brightness. Thin-layer perfect absorbers with periodic hole arrays are designed at visible frequencies and the absorption peaks are tuned by simply adjusting the hole size and periodicity. Near perfect light absorption with high quality factors are obtained to realize high-resolution, angle-insensitive plasmonic color printing with high color saturation and brightness. Moreover, the fabricated metasurfaces can be protected with a protective coating for ambient use without degrading performances. The demonstrated structural color printing platform offers great potential for applications ranging from security marking to information storage. JF - Scientific reports AU - Cheng, Fei AU - Gao, Jie AU - Luk, Ting S AU - Yang, Xiaodong AD - Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA. ; Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, NM 87185, USA. Y1 - 2015/06/05/ PY - 2015 DA - 2015 Jun 05 SP - 11045 VL - 5 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686999822?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Scientific+reports&rft.atitle=Structural+color+printing+based+on+plasmonic+metasurfaces+of+perfect+light+absorption.&rft.au=Cheng%2C+Fei%3BGao%2C+Jie%3BLuk%2C+Ting+S%3BYang%2C+Xiaodong&rft.aulast=Cheng&rft.aufirst=Fei&rft.date=2015-06-05&rft.volume=5&rft.issue=&rft.spage=11045&rft.isbn=&rft.btitle=&rft.title=Scientific+reports&rft.issn=2045-2322&rft_id=info:doi/10.1038%2Fsrep11045 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-09-02 N1 - Date created - 2015-06-06 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Proc Natl Acad Sci U S A. 2009 Nov 17;106(46):19227-32 [19880744] Opt Express. 2010 Jun 21;18(13):14056-62 [20588537] Nat Commun. 2010;1:59 [20975716] Nat Nanotechnol. 2012 Sep;7(9):557-61 [22886173] Nano Lett. 2012 Feb 8;12(2):1026-31 [22229785] Adv Mater. 2012 May 8;24(18):2375-9 [22489053] Small. 2011 Nov 18;7(22):3128-36 [21932283] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/srep11045 ER - TY - JOUR T1 - Solar power simulations for a renewable integration study in New Mexico using sparse input data AN - 1805505084; PQ0003055686 AB - Since solar PV power generation is growing rapidly, it is important to accurately model solar power production in renewable generation integration studies which look at the impact of variable renewable generation on electric grid operations. However, solar irradiance or power measurements are often sparse both spatially and temporally, making it difficult to simulate PV power output. Here, we describe the technique used to simulate generation from up to 40 utility-scale PV plants and 9 areas of distributed PV in the state of New Mexico given only five hourly irradiance measurements plus a sixth irradiance measurement at 1-minute resolution that was used as a lookup library. Spatial smoothing based on the plant size was applied, then this area-average irradiance was converted to PV power output using irradiance to power models. In this way, PV power output profiles for each location, and for the aggregate of all locations, were produced and supplied to the integration study. Also for use in the study, day-ahead solar power output forecasts were created by adding errors representative of the current state of solar forecasting to the actual power output values. JF - The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Conference Proceedings. AU - Lave, Matthew AU - Ellis, Abraham AU - Nail, George AD - Sandia National Laboratories, Livermore, California, 94550, USA Y1 - 2015/06// PY - 2015 DA - June 2015 SP - 1 EP - 6 PB - Institute of Electrical and Electronics Engineers, Inc. KW - Sustainability Science Abstracts KW - USA, New Mexico KW - Conferences KW - Electric power generation KW - Solar cells KW - Simulation KW - Solar energy KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1805505084?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=The+Institute+of+Electrical+and+Electronics+Engineers%2C+Inc.+%28IEEE%29+Conference+Proceedings.&rft.atitle=Solar+power+simulations+for+a+renewable+integration+study+in+New+Mexico+using+sparse+input+data&rft.au=Lave%2C+Matthew%3BEllis%2C+Abraham%3BNail%2C+George&rft.aulast=Lave&rft.aufirst=Matthew&rft.date=2015-06-01&rft.volume=&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=The+Institute+of+Electrical+and+Electronics+Engineers%2C+Inc.+%28IEEE%29+Conference+Proceedings.&rft.issn=&rft_id=info:doi/10.1109%2FPVSC.2015.7356252 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-07-01 N1 - Last updated - 2016-08-17 N1 - SubjectsTermNotLitGenreText - Conferences; Solar cells; Electric power generation; Simulation; Solar energy; USA, New Mexico DO - http://dx.doi.org/10.1109/PVSC.2015.7356252 ER - TY - JOUR T1 - The mechanism of borosilicate glass corrosion revisited AN - 1696873406; 2015-069870 AB - Currently accepted mechanistic models describing aqueous corrosion of borosilicate glasses are based on diffusion-controlled hydrolysis, hydration, ion exchange reactions, and subsequent re-condensation of the hydrolyzed glass network, leaving behind a residual hydrated glass or gel layer. Here, we report results of novel oxygen and silicon isotope tracer experiments with ternary Na borosilicate glasses that can be better explained by a process that involves the congruent dissolution of the glass, which is spatially and temporally coupled to the precipitation and growth of an amorphous silica layer at an inwardly moving reaction interface. Such a process is thermodynamically driven by the solubility difference between the glass and amorphous silica, and kinetically controlled by glass dissolution reactions at the reaction front, which, in turn, are controlled by the transport of water and solute elements through the growing corrosion zone. Understanding the coupling of these reactions is the key to understand the formation of laminar or more complex structural and chemical patterns observed in natural corrosion zones of ancient glasses. We suggest that these coupled processes also have to be considered to realistically model the long-term performance of silicate glasses in aqueous environments. Abstract Copyright (2015) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Geisler, Thorsten AU - Nagel, Thorsten AU - Kilburn, Matt R AU - Janssen, Arne AU - Icenhower, Jonathan P AU - Fonseca, Raul O C AU - Grange, Marion AU - Nemchin, Alexander A Y1 - 2015/06/01/ PY - 2015 DA - 2015 Jun 01 SP - 112 EP - 129 PB - Elsevier, New York, NY VL - 158 SN - 0016-7037, 0016-7037 KW - silicates KW - volcanic rocks KW - oxygen KW - ion probe data KW - glasses KW - isotopes KW - igneous rocks KW - mass spectra KW - hydrolysis KW - silicon KW - stable isotopes KW - electron probe data KW - chemical reactions KW - water-rock interaction KW - silica KW - tracers KW - spectra KW - ion exchange KW - corrosion KW - experimental studies KW - condensation KW - amorphous materials KW - isotope ratios KW - alkali metals KW - electron microscopy data KW - O-18/O-16 KW - sodium KW - X-ray spectra KW - EDS spectra KW - models KW - ICP mass spectra KW - hydration KW - borosilicates KW - Raman spectra KW - precipitation KW - metals KW - NanoSIMS KW - Si-30/Si-28 KW - crystal chemistry KW - SEM data KW - 05A:Igneous and metamorphic petrology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696873406?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=The+mechanism+of+borosilicate+glass+corrosion+revisited&rft.au=Geisler%2C+Thorsten%3BNagel%2C+Thorsten%3BKilburn%2C+Matt+R%3BJanssen%2C+Arne%3BIcenhower%2C+Jonathan+P%3BFonseca%2C+Raul+O+C%3BGrange%2C+Marion%3BNemchin%2C+Alexander+A&rft.aulast=Geisler&rft.aufirst=Thorsten&rft.date=2015-06-01&rft.volume=158&rft.issue=&rft.spage=112&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2015.02.039 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Number of references - 75 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2015-07-17 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - alkali metals; amorphous materials; borosilicates; chemical reactions; condensation; corrosion; crystal chemistry; EDS spectra; electron microscopy data; electron probe data; experimental studies; glasses; hydration; hydrolysis; ICP mass spectra; igneous rocks; ion exchange; ion probe data; isotope ratios; isotopes; mass spectra; metals; models; NanoSIMS; O-18/O-16; oxygen; precipitation; Raman spectra; SEM data; Si-30/Si-28; silica; silicates; silicon; sodium; spectra; stable isotopes; tracers; volcanic rocks; water-rock interaction; X-ray spectra DO - http://dx.doi.org/10.1016/j.gca.2015.02.039 ER - TY - JOUR T1 - In situ atomic-scale observation of twinning-dominated deformation in nanoscale body-centred cubic tungsten. AN - 1682427668; 25751073 AB - Twinning is a fundamental deformation mode that competes against dislocation slip in crystalline solids. In metallic nanostructures, plastic deformation requires higher stresses than those needed in their bulk counterparts, resulting in the 'smaller is stronger' phenomenon. Such high stresses are thought to favour twinning over dislocation slip. Deformation twinning has been well documented in face-centred cubic (FCC) nanoscale crystals. However, it remains unexplored in body-centred cubic (BCC) nanoscale crystals. Here, by using in situ high-resolution transmission electron microscopy and atomistic simulations, we show that twinning is the dominant deformation mechanism in nanoscale crystals of BCC tungsten. Such deformation twinning is pseudoelastic, manifested through reversible detwinning during unloading. We find that the competition between twinning and dislocation slip can be mediated by loading orientation, which is attributed to the competing nucleation mechanism of defects in nanoscale BCC crystals. Our work provides direct observations of deformation twinning as well as new insights into the deformation mechanism in BCC nanostructures. JF - Nature materials AU - Wang, Jiangwei AU - Zeng, Zhi AU - Weinberger, Christopher R AU - Zhang, Ze AU - Zhu, Ting AU - Mao, Scott X AD - Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA. ; Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA. ; 1] Materials Science and Engineering Center, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA [2] Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, Pennsylvania 19104, USA. ; Department of Materials Science and Engineering and State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China. ; 1] Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA [2] School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA. ; 1] Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA [2] Department of Materials Science and Engineering and State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China. Y1 - 2015/06// PY - 2015 DA - June 2015 SP - 594 EP - 600 VL - 14 IS - 6 SN - 1476-1122, 1476-1122 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1682427668?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+materials&rft.atitle=In+situ+atomic-scale+observation+of+twinning-dominated+deformation+in+nanoscale+body-centred+cubic+tungsten.&rft.au=Wang%2C+Jiangwei%3BZeng%2C+Zhi%3BWeinberger%2C+Christopher+R%3BZhang%2C+Ze%3BZhu%2C+Ting%3BMao%2C+Scott+X&rft.aulast=Wang&rft.aufirst=Jiangwei&rft.date=2015-06-01&rft.volume=14&rft.issue=6&rft.spage=594&rft.isbn=&rft.btitle=&rft.title=Nature+materials&rft.issn=14761122&rft_id=info:doi/10.1038%2Fnmat4228 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-07-22 N1 - Date created - 2015-05-20 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1038/nmat4228 ER - TY - JOUR T1 - Microtubule-based nanomaterials: Exploiting nature's dynamic biopolymers AN - 1680461140; PQ0001499520 AB - For more than a decade now, biomolecular systems have served as an inspiration for the development of synthetic nanomaterials and systems that are capable of reproducing many of unique and emergent behaviors of living systems. One intriguing element of such systems may be found in a specialized class of proteins known as biomolecular motors that are capable of performing useful work across multiple length scales through the efficient conversion of chemical energy. Microtubule (MT) filaments may be considered within this context as their dynamic assembly and disassembly dissipate energy, and perform work within the cell. MTs are one of three cytoskeletal filaments in eukaryotic cells, and play critical roles in a range of cellular processes including mitosis and vesicular trafficking. Based on their function, physical attributes, and unique dynamics, MTs also serve as a powerful archetype of a supramolecular filament that underlies and drives multiscale emergent behaviors. In this review, we briefly summarize recent efforts to generate hybrid and composite nanomaterials using MTs as biomolecular scaffolds, as well as computational and synthetic approaches to develop synthetic one-dimensional nanostructures that display the enviable attributes of the natural filaments. Biotechnol. Bioeng. 2015; 112: 1065-1073. copyright 2015 Wiley Periodicals, Inc. Microtubules (MTs) are nanoscale, biopolymeric filaments that produce useful forces during states of polymerization and depolymerization, and serve as transportation highways within the cytoplasm of eukaryotic cells. This review summarizes experimental efforts to generate hybrid and composite nanomaterials using MTs as a scaffold, and computational and synthetic approaches toward the development of synthetic one-dimensional nanostructures that exhibit the enviable attributes of the natural MT filaments. JF - Biotechnology and Bioengineering AU - Bachand, George D AU - Spoerke, Erik D AU - Stevens, Mark J AD - Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, 87185-1303, New Mexico. Y1 - 2015/06// PY - 2015 DA - Jun 2015 SP - 1065 EP - 1073 PB - Wiley Subscription Services VL - 112 IS - 6 SN - 0006-3592, 0006-3592 KW - Biotechnology and Bioengineering Abstracts KW - Microtubules KW - Polymerization KW - Depolymerization KW - Biopolymers KW - Computer applications KW - scaffolds KW - Cytoskeleton KW - Cytoplasm KW - Mitosis KW - Hybrids KW - Energy KW - Filaments KW - nanotechnology KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680461140?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biotechnology+and+Bioengineering&rft.atitle=Microtubule-based+nanomaterials%3A+Exploiting+nature%27s+dynamic+biopolymers&rft.au=Bachand%2C+George+D%3BSpoerke%2C+Erik+D%3BStevens%2C+Mark+J&rft.aulast=Bachand&rft.aufirst=George&rft.date=2015-06-01&rft.volume=112&rft.issue=6&rft.spage=1065&rft.isbn=&rft.btitle=&rft.title=Biotechnology+and+Bioengineering&rft.issn=00063592&rft_id=info:doi/10.1002%2Fbit.25569 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-05-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Microtubules; Polymerization; Depolymerization; Biopolymers; Computer applications; scaffolds; Cytoskeleton; Energy; Hybrids; Mitosis; Cytoplasm; Filaments; nanotechnology DO - http://dx.doi.org/10.1002/bit.25569 ER - TY - CPAPER T1 - Spall Effects on Infrasound Generation from Explosions at the Nevada National Security Site T2 - 169th Meeting of the Acoustical Society of America AN - 1669822860; 6341865 JF - 169th Meeting of the Acoustical Society of America AU - Jones, Kyle AU - Rodgers, Arthur AU - Whitaker, Rodney AU - Ezzedine, Souheil AU - Vorobiev, Oleg Y1 - 2015/05/18/ PY - 2015 DA - 2015 May 18 KW - Security KW - Infrasound KW - USA, Nevada KW - Explosions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1669822860?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=169th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Spall+Effects+on+Infrasound+Generation+from+Explosions+at+the+Nevada+National+Security+Site&rft.au=Jones%2C+Kyle%3BRodgers%2C+Arthur%3BWhitaker%2C+Rodney%3BEzzedine%2C+Souheil%3BVorobiev%2C+Oleg&rft.aulast=Jones&rft.aufirst=Kyle&rft.date=2015-05-18&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=169th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://asa2015spring.abstractcentral.com/planner.jsp LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-31 N1 - Last updated - 2015-04-06 ER - TY - CPAPER T1 - Inverse Problems in Transient Structural Acoustics T2 - 169th Meeting of the Acoustical Society of America AN - 1669822467; 6341673 JF - 169th Meeting of the Acoustical Society of America AU - Walsh, Timothy AU - Aquino, Wilkins Y1 - 2015/05/18/ PY - 2015 DA - 2015 May 18 KW - Acoustics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1669822467?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=169th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Inverse+Problems+in+Transient+Structural+Acoustics&rft.au=Walsh%2C+Timothy%3BAquino%2C+Wilkins&rft.aulast=Walsh&rft.aufirst=Timothy&rft.date=2015-05-18&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=169th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://asa2015spring.abstractcentral.com/planner.jsp LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-31 N1 - Last updated - 2015-04-06 ER - TY - JOUR T1 - Surfactant-induced assembly of enzymatically-stable peptide hydrogels. AN - 1677374812; 25853589 AB - The secondary structure of peptides in the presence of interacting additives is an important topic of study, having implications in the application of peptide science to a broad range of modern technologies. Surfactants constitute a class of biologically relevant compounds that are known to influence both peptide conformation and aggregation or assembly. We have characterized the secondary structure of a linear nonapeptide composed of a hydrophobic alanine/phenylalanine core flanked by hydrophilic acid/amine units. We show that the anionic surfactant sodium dodecyl sulfate (SDS) induces the formation of β-sheets and macroscopic gelation in this otherwise unstructured peptide. Through comparison to related additives, we propose that SDS-induced secondary structure formation is the result of amphiphilicity created by electrostatic binding of SDS to the peptide. In addition, we demonstrate a novel utility of surfactants in manipulating and stabilizing peptide nanostructures. SDS is used to simultaneously induce secondary structure in a peptide and to inhibit the activity of a model enzyme, resulting in a peptide hydrogel that is impervious to enzymatic degradation. These results complement our understanding of the behavior of peptides in the presence of interacting secondary molecules and provide new potential pathways for programmable organization of peptides by the addition of such components. JF - Soft matter AU - Jones, Brad H AU - Martinez, Alina M AU - Wheeler, Jill S AU - Spoerke, Erik D AD - Sandia National Laboratories, Electronic, Optical, and Nano Materials, PO Box 5800, MS 1411, Albuquerque, NM 87185, USA. edspoer@sandia.gov. Y1 - 2015/05/14/ PY - 2015 DA - 2015 May 14 SP - 3572 EP - 3580 VL - 11 IS - 18 KW - Hydrogels KW - 0 KW - Peptides KW - Surface-Active Agents KW - Sodium Dodecyl Sulfate KW - 368GB5141J KW - Index Medicus KW - Spectroscopy, Fourier Transform Infrared KW - Hydrophobic and Hydrophilic Interactions KW - Rheology KW - Protein Structure, Secondary KW - X-Ray Diffraction KW - Sodium Dodecyl Sulfate -- chemistry KW - Scattering, Small Angle KW - Circular Dichroism KW - Amino Acid Sequence KW - Peptides -- chemical synthesis KW - Surface-Active Agents -- chemistry KW - Peptides -- chemistry KW - Hydrogels -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1677374812?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Soft+matter&rft.atitle=Surfactant-induced+assembly+of+enzymatically-stable+peptide+hydrogels.&rft.au=Jones%2C+Brad+H%3BMartinez%2C+Alina+M%3BWheeler%2C+Jill+S%3BSpoerke%2C+Erik+D&rft.aulast=Jones&rft.aufirst=Brad&rft.date=2015-05-14&rft.volume=11&rft.issue=18&rft.spage=3572&rft.isbn=&rft.btitle=&rft.title=Soft+matter&rft.issn=1744-6848&rft_id=info:doi/10.1039%2Fc5sm00522a LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-04-05 N1 - Date created - 2015-04-29 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1039/c5sm00522a ER - TY - JOUR T1 - Transport spectroscopy of low disorder silicon tunnel barriers with and without Sb implants AN - 1753467385; PQ0002045389 AB - We present transport measurements of silicon MOS split gate structures with and without Sb implants. We observe classical point contact (PC) behavior that is free of any pronounced unintentional resonances at liquid He temperatures. The implanted device has resonances superposed on the PC transport indicative of transport through the Sb donors. We fit the differential conductance to a rectangular tunnel barrier model with a linear barrier height dependence on source-drain voltage and non-linear dependence on gate bias. Effects such as Fowler-Nordheim (FN) tunneling and image charge barrier lowering (ICBL) are considered. Barrier heights and widths are estimated for the entire range of relevant biases. The barrier heights at the locations of some of the resonances for the implanted tunnel barrier are between 15-20 meV, which are consistent with transport through shallow partially hybridized Sb donors. The dependence of width and barrier height on gate voltage is found to be linear over a wide range of gate bias in the split gate geometry but deviates considerably when the barrier becomes large and is not described completely by standard 1D models such as FN or ICBL effects. JF - Nanotechnology AU - Shirkhorshidian, A AU - Bishop, N C AU - Dominguez, J AU - Grubbs, R K AU - Wendt, J R AU - Lilly, M P AU - Carroll, M S AD - University of New Mexico, Albuquerque, NM 87131, USA, ashirkh@sandia.gov PY - 2015 SP - 1 EP - 7 PB - IOP Publishing VL - 26 IS - 20 SN - 0957-4484, 0957-4484 KW - Biotechnology and Bioengineering Abstracts KW - quantum computing KW - silicon KW - donor KW - MOS KW - tunneling KW - electron KW - antimony KW - Temperature effects KW - Silicon KW - Conductance KW - Tunnels KW - Spectroscopy KW - Models KW - W 30965:Miscellaneous, Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1753467385?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nanotechnology&rft.atitle=Transport+spectroscopy+of+low+disorder+silicon+tunnel+barriers+with+and+without+Sb+implants&rft.au=Shirkhorshidian%2C+A%3BBishop%2C+N+C%3BDominguez%2C+J%3BGrubbs%2C+R+K%3BWendt%2C+J+R%3BLilly%2C+M+P%3BCarroll%2C+M+S&rft.aulast=Shirkhorshidian&rft.aufirst=A&rft.date=2015-05-02&rft.volume=26&rft.issue=20&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Nanotechnology&rft.issn=09574484&rft_id=info:doi/10.1088%2F0957-4484%2F26%2F20%2F205703 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-01-21 N1 - SubjectsTermNotLitGenreText - Temperature effects; Silicon; Conductance; Spectroscopy; Tunnels; Models DO - http://dx.doi.org/10.1088/0957-4484/26/20/205703 ER - TY - JOUR T1 - PROBABILITY AND CONSEQUENCES OF NUCLEAR CRITICALITY AT A GEOLOGIC REPOSITORY-I: CONCEPTUAL OVERVIEW FOR SCREENING AN - 1765966227; PQ0002500253 AB - This paper, Part I of two companion papers, reviews concepts underlying the basis for evaluating the criticality scenario for an assessment of performance after closure of a geologic repository for radioactive waste. In the United States, either a low-probability or low-consequence rationale can be the basis of excluding criticality, using the usual assumptions that (a) the interplay between the probability and consequence is not significant and (b) the mean of the epistemic uncertainty of the probability and consequence provides a sufficient approximation. Furthermore, the rationale can be based on either qualitative or quantitative arguments. For those situations with quantitative arguments, this paper provides additional perspective on evaluating the criticality scenario by combining quantitative estimates of low probability and low consequence as a complementary cumulative distribution function. As a demonstration, the low probability and low consequence of the criticality scenario for the Waste Isolation Pilot Plant (a repository for defense transuranic element waste) is presented. JF - Nuclear Technology AU - Rechard, Rob P AD - Sandia National Laboratories, Nuclear Waste Disposal Research and Analysis Albuquerque, New Mexico 87185-0747, rprecha@sandia.gov Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 97 EP - 126 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 190 IS - 2 SN - 0029-5450, 0029-5450 KW - Pollution Abstracts KW - critical event KW - criticality scenario screening KW - radioactive waste disposal KW - USA KW - Reviews KW - Radioactive wastes KW - Geology KW - Transuranics KW - Hazardous wastes KW - P 8000:RADIATION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765966227?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Technology&rft.atitle=PROBABILITY+AND+CONSEQUENCES+OF+NUCLEAR+CRITICALITY+AT+A+GEOLOGIC+REPOSITORY-I%3A+CONCEPTUAL+OVERVIEW+FOR+SCREENING&rft.au=Rechard%2C+Rob+P&rft.aulast=Rechard&rft.aufirst=Rob&rft.date=2015-05-01&rft.volume=190&rft.issue=2&rft.spage=97&rft.isbn=&rft.btitle=&rft.title=Nuclear+Technology&rft.issn=00295450&rft_id=info:doi/10.13182%2FNT14-40 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Number of references - 86 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Reviews; Radioactive wastes; Geology; Transuranics; Hazardous wastes; USA DO - http://dx.doi.org/10.13182/NT14-40 ER - TY - JOUR T1 - Unsaturated hydraulic conductivity models based on truncated lognormal pore-size distributions AN - 1734270942; 2015-112512 AB - We develop a closed-form three-parameter model for unsaturated hydraulic conductivity associated with the Kosugi three-parameter lognormal moisture retention model. The model derivation uses a slight modification to Mualem's theory, which is nearly exact for nonclay soils. Kosugi's three-parameter lognormal moisture retention model uses physically meaningful parameters, but a corresponding closed-form relative hydraulic conductivity model has never been developed. The model is further extended to a four-parameter model by truncating the underlying pore-size distribution at physically permissible minimum and maximum pore radii. The proposed closed-form models are fitted to well-known experimental data to illustrate their utility. They have the same physical basis as Kosugi's two-parameter model, but are more general. Abstract Copyright (2014), , National Ground Water Association. JF - Ground Water AU - Malama, Bwalya AU - Kuhlman, Kristopher L Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 498 EP - 502 PB - Wiley-Blackwell on behalf of National Ground Water Association, Westerville, OH VL - 53 IS - 3 SN - 0017-467X, 0017-467X KW - numerical models KW - capillary pressure KW - moisture KW - unsaturated zone KW - prediction KW - porous materials KW - mathematical models KW - equations KW - porosity KW - ground water KW - aquifers KW - models KW - saturation KW - infiltration KW - retention KW - hydraulic conductivity KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734270942?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ground+Water&rft.atitle=Unsaturated+hydraulic+conductivity+models+based+on+truncated+lognormal+pore-size+distributions&rft.au=Malama%2C+Bwalya%3BKuhlman%2C+Kristopher+L&rft.aulast=Malama&rft.aufirst=Bwalya&rft.date=2015-05-01&rft.volume=53&rft.issue=3&rft.spage=498&rft.isbn=&rft.btitle=&rft.title=Ground+Water&rft.issn=0017467X&rft_id=info:doi/10.1111%2Fgwat.12220 L2 - http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1745-6584 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 13 N1 - PubXState - OH N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-10-25 N1 - CODEN - GRWAAP N1 - SubjectsTermNotLitGenreText - aquifers; capillary pressure; equations; ground water; hydraulic conductivity; infiltration; mathematical models; models; moisture; numerical models; porosity; porous materials; prediction; retention; saturation; unsaturated zone DO - http://dx.doi.org/10.1111/gwat.12220 ER - TY - JOUR T1 - Observations from streams and springs provide insight into groundwater in Yellowstone AN - 1734267771; 2015-109674 AB - Observations from stream geomorphology and stream hydrographs and hydrograph separation provide evidence for large scale, rapid groundwater circulation in Yellowstone. Ratios of annual maximum to minimum mean-daily discharge, baseflow index, and mean annual basin recharge were calculated from streamflow data for the period of record at 32 U.S. Geological Survey gaging stations in the Yellowstone area. Ground-water ages were determined from tritium and CFC analyses of water from 30 low-temperature springs discharging from Quaternary volcanics in the Norris area of Yellowstone National Park. The ratio of annual maximum to minimum mean daily discharge varied from 1.9 to 226. Streams with basins underlain by Yellowstone Quaternary rhyolites and tuffs had ratios ranging from 2 to 7 indicating that these streams were dominated by ground-water inflows. Streams in basins with high ratios (30-226) generally were underlain by Precambrian crystalline, Paleozoic sedimentary, and Eocene volcanic rocks and streamflow was dominated by runoff. Recession and baseflow indices have similar characteristics and correlation with geologic units. Water from all springs sampled had measurable CFC and tritium and a significant fraction of modern water indicating rapid flow rates through Quaternary volcanics. Ground-water recharge calculated from baseflow hydrographs indicate 50 percent of precipitation becomes recharge providing further evidence that Yellowstone Quaternary volcanics are highly permeable. The ground-water flow system in the Quaternary volcanics, because of its high permeability, is dynamic and is likely an important component in the surficial expression of the Yellowstone geothermal system. JF - Abstracts with Programs - Geological Society of America AU - Susong, David AU - Heasler, Hank P AU - Gardner, W Payton AU - Solomon, D Kip AU - Anonymous Y1 - 2015/05// PY - 2015 DA - May 2015 SP - 6 PB - Geological Society of America (GSA), Boulder, CO VL - 47 IS - 6 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1734267771?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Observations+from+streams+and+springs+provide+insight+into+groundwater+in+Yellowstone&rft.au=Susong%2C+David%3BHeasler%2C+Hank+P%3BGardner%2C+W+Payton%3BSolomon%2C+D+Kip%3BAnonymous&rft.aulast=Susong&rft.aufirst=David&rft.date=2015-05-01&rft.volume=47&rft.issue=6&rft.spage=6&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Rocky Mountain Section, 67th annual meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-11-19 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Active tuning of all-dielectric metasurfaces. AN - 1676596579; 25748581 AB - All-dielectric metasurfaces provide a powerful platform for highly efficient flat optical devices, owing to their strong electric and magnetic dipolar response accompanied by negligible losses at near-infrared frequencies. Here we experimentally demonstrate dynamic tuning of electric and magnetic resonances in all-dielectric silicon nanodisk metasurfaces in the telecom spectral range based on the temperature-dependent refractive-index change of a nematic liquid crystal. We achieve a maximum resonance tuning range of 40 nm and a pronounced change in the transmittance intensity up to a factor of 5. Strongly different tuning rates are observed for the electric and the magnetic response, which allows for dynamically adjusting the spectral mode separation. Furthermore, we experimentally investigate the influence of the anisotropic (temperature-dependent) dielectric environment provided by the liquid crystal on both the electric and magnetic resonances. We demonstrate that the phase transition of the liquid crystal from its nematic to its isotropic phase can be used to break the symmetry of the optical metasurface response. As such, our approach allows for spectral tuning of electric and magnetic resonances of all-dielectric metasurfaces as well as switching of the anisotropy of the optical response of the device. JF - ACS nano AU - Sautter, Jürgen AU - Staude, Isabelle AU - Decker, Manuel AU - Rusak, Evgenia AU - Neshev, Dragomir N AU - Brener, Igal AU - Kivshar, Yuri S AD - †Nonlinear Physics Centre and Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia. ; ‡Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States. Y1 - 2015/04/28/ PY - 2015 DA - 2015 Apr 28 SP - 4308 EP - 4315 VL - 9 IS - 4 KW - liquid crystals KW - metasurfaces KW - optical anisotropy KW - tunable metamaterials KW - high-permittivity nanoparticles KW - nanostructures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676596579?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+nano&rft.atitle=Active+tuning+of+all-dielectric+metasurfaces.&rft.au=Sautter%2C+J%C3%BCrgen%3BStaude%2C+Isabelle%3BDecker%2C+Manuel%3BRusak%2C+Evgenia%3BNeshev%2C+Dragomir+N%3BBrener%2C+Igal%3BKivshar%2C+Yuri+S&rft.aulast=Sautter&rft.aufirst=J%C3%BCrgen&rft.date=2015-04-28&rft.volume=9&rft.issue=4&rft.spage=4308&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/10.1021%2Facsnano.5b00723 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-07-06 N1 - Date created - 2015-04-28 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acsnano.5b00723 ER - TY - JOUR T1 - Growth of Au on Pt icosahedral nanoparticles revealed by low-dose in situ TEM. AN - 1672092783; 25723499 AB - A growth mode was revealed by an in situ TEM study of nucleation and growth of Au on Pt icosahedral nanoparticles. Quantitative analysis of growth kinetics was carried out based on real-time TEM data, which shows the process involves: (1) deposition of Au on corner sites of Pt icosahedral nanoparticles, (2) diffusion of Au from corners to terraces and edges, and (3) subsequent layer-by-layer growth of Au on Au surfaces to form Pt@Au core-shell nanoparticles. The in situ TEM results indicate diffusion of Au from corner islands to terraces and edges is a kinetically controlled growth, as evidenced by a measurement of diffusion coefficients for these growth processes. We demonstrated that in situ electron microscopy is a valuable tool for quantitative study of nucleation and growth kinetics and can provide new insight into the design and precise control of heterogeneous nanostructures. JF - Nano letters AU - Wu, Jianbo AU - Gao, Wenpei AU - Wen, Jianguo AU - Miller, Dean J AU - Lu, Ping AU - Zuo, Jian-Min AU - Yang, Hong AD - †Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 West Green Street, Urbana, Illinois 61801, United States. ; ∥Electron Microscopy Center - Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States. ; ⊥Sandia National Laboratories, Albuquerque, New Mexico 87185, United States. Y1 - 2015/04/08/ PY - 2015 DA - 2015 Apr 08 SP - 2711 EP - 2715 VL - 15 IS - 4 KW - Platinum KW - 49DFR088MY KW - Gold KW - 7440-57-5 KW - Index Medicus KW - flow cell KW - nanoparticle KW - platinum KW - In situ TEM KW - growth KW - Radiation Dosage KW - Molecular Imprinting -- methods KW - Materials Testing -- methods KW - Platinum -- chemistry KW - Microscopy, Electron, Transmission -- methods KW - Metal Nanoparticles -- chemistry KW - Metal Nanoparticles -- ultrastructure KW - Crystallization -- methods KW - Gold -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1672092783?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nano+letters&rft.atitle=Growth+of+Au+on+Pt+icosahedral+nanoparticles+revealed+by+low-dose+in+situ+TEM.&rft.au=Wu%2C+Jianbo%3BGao%2C+Wenpei%3BWen%2C+Jianguo%3BMiller%2C+Dean+J%3BLu%2C+Ping%3BZuo%2C+Jian-Min%3BYang%2C+Hong&rft.aulast=Wu&rft.aufirst=Jianbo&rft.date=2015-04-08&rft.volume=15&rft.issue=4&rft.spage=2711&rft.isbn=&rft.btitle=&rft.title=Nano+letters&rft.issn=1530-6992&rft_id=info:doi/10.1021%2Facs.nanolett.5b00414 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2016-04-05 N1 - Date created - 2015-04-08 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/acs.nanolett.5b00414 ER - TY - JOUR T1 - Infrasound observations from a seismo-acoustic hammer source at the Nevada National Security Site AN - 1812218634; 2016-068532 JF - Seismological Research Letters AU - Jones, K R AU - Abbott, R E AU - Hampshire, J AU - White, R AU - Marcillo, O AU - Whitaker, R AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 732 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - Nevada Test Site KW - Nevada National Security Site KW - experimental studies KW - technology KW - detection KW - seismicity KW - explosions KW - testing KW - nuclear explosions KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812218634?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Infrasound+observations+from+a+seismo-acoustic+hammer+source+at+the+Nevada+National+Security+Site&rft.au=Jones%2C+K+R%3BAbbott%2C+R+E%3BHampshire%2C+J%3BWhite%2C+R%3BMarcillo%2C+O%3BWhitaker%2C+R%3BAnonymous&rft.aulast=Jones&rft.aufirst=K&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=732&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - detection; experimental studies; explosions; Nevada; Nevada National Security Site; Nevada Test Site; nuclear explosions; seismicity; technology; testing; United States ER - TY - JOUR T1 - Extending SALSA3D; adding secondary phases to a global 3D model for improved seismic event location AN - 1812211116; 2016-068267 JF - Seismological Research Letters AU - Begnaud, M L AU - Ballard, S AU - Young, C J AU - Hipp, J R AU - Encarnacao, A V AU - Maceira, M AU - Phillips, W S AU - Chael, E P AU - Rowe, C A AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 679 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - tomography KW - P-waves KW - body waves KW - technology KW - three-dimensional models KW - explosions KW - prediction KW - elastic waves KW - seismic sources KW - detection KW - seismicity KW - SALSA3D KW - focus KW - seismic waves KW - compression KW - earthquakes KW - S-waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812211116?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Extending+SALSA3D%3B+adding+secondary+phases+to+a+global+3D+model+for+improved+seismic+event+location&rft.au=Begnaud%2C+M+L%3BBallard%2C+S%3BYoung%2C+C+J%3BHipp%2C+J+R%3BEncarnacao%2C+A+V%3BMaceira%2C+M%3BPhillips%2C+W+S%3BChael%2C+E+P%3BRowe%2C+C+A%3BAnonymous&rft.aulast=Begnaud&rft.aufirst=M&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=679&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - body waves; compression; detection; earthquakes; elastic waves; explosions; focus; P-waves; prediction; S-waves; SALSA3D; seismic sources; seismic waves; seismicity; technology; three-dimensional models; tomography ER - TY - JOUR T1 - A test of a 13,000-kg weight-drop seismic source AN - 1812210814; 2016-068261 JF - Seismological Research Letters AU - Abbott, R E AU - Preston, L AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 678 EP - 679 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - United States KW - Nevada National Security Site KW - technology KW - seismicity KW - velocity structure KW - Yucca Flat KW - seismographs KW - seismic sources KW - Nevada KW - instruments KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812210814?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=A+test+of+a+13%2C000-kg+weight-drop+seismic+source&rft.au=Abbott%2C+R+E%3BPreston%2C+L%3BAnonymous&rft.aulast=Abbott&rft.aufirst=R&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=678&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - instruments; Nevada; Nevada National Security Site; seismic sources; seismicity; seismographs; technology; United States; velocity structure; Yucca Flat ER - TY - JOUR T1 - Developing path-dependent uncertainty estimates for use with the regional seismic travel time (Rstt) model AN - 1807508742; 2016-066587 JF - Seismological Research Letters AU - Begnaud, M L AU - Anderson, D N AU - Phillips, W S AU - Myers, S C AU - Ballard, S AU - Anonymous Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 640 PB - Seismological Society of America, El Cerrito, CA VL - 86 IS - 2B SN - 0895-0695, 0895-0695 KW - tomography KW - models KW - seismicity KW - traveltime KW - elastic waves KW - uncertainty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1807508742?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Developing+path-dependent+uncertainty+estimates+for+use+with+the+regional+seismic+travel+time+%28Rstt%29+model&rft.au=Begnaud%2C+M+L%3BAnderson%2C+D+N%3BPhillips%2C+W+S%3BMyers%2C+S+C%3BBallard%2C+S%3BAnonymous&rft.aulast=Begnaud&rft.aufirst=M&rft.date=2015-04-01&rft.volume=86&rft.issue=2B&rft.spage=640&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2015 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - PubXState - CA N1 - Last updated - 2016-11-17 N1 - SubjectsTermNotLitGenreText - elastic waves; models; seismicity; tomography; traveltime; uncertainty ER - TY - JOUR T1 - Fracture propagation in Indiana Limestone interpreted via linear softening cohesive fracture model AN - 1780804989; 2016-033910 AB - We examine the use of a linear softening cohesive fracture model (LCFM) to predict single-trace fracture growth in short-rod (SR) and notched 3-point-bend (N3PB) test configurations in Indiana Limestone. The broad goal of this work is to (a) understand the underlying assumptions of LCFM and (b) use experimental similarities and deviations from the LCFM to understand the role of loading paths of tensile fracture propagation. Cohesive fracture models are being applied in prediction of structural and subsurface fracture propagation in geomaterials. They lump the inelastic processes occurring during fracture propagation into a thin zone between elastic subdomains. LCFM assumes that the cohesive zone initially deforms elastically to a maximum tensile stress (sigma (sub max) ) and then softens linearly from the crack opening width at sigma (sub max) to zero stress at a critical crack opening width w (sub 1) . Using commercial finite element software, we developed LCFMs for the SR and N3PB configurations. After fixing sigma (sub max) with results from cylinder splitting tests and finding an initial Young's modulus (E) with unconfined compressive strength tests, we manually calibrate E and w (sub 1) in the SR model against an envelope of experimental data. We apply the calibrated LCFM parameters in the N3PB geometry and compare the model against an envelope of N3PB experiments. For accurate simulation of fracture propagation, simulated off-crack stresses are high enough to require inclusion of damage. Different elastic moduli are needed in tension and compression. We hypothesize that the timing and location of shear versus extensional micromechanical failures control the qualitative macroscopic force-versus-displacement response in different tests. For accurate prediction, the LCFM requires a constant style of failure, which the SR configuration maintains until very late in deformation. The N3PB configuration does not maintain this constancy. To be broadly applicable between geometries and failure styles, the LCFM would require additional physics, possibly including elastoplastic damage in the bulk material and more complicated cohesive softening models. Abstract Copyright (2015), American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Solid Earth AU - Rinehart, Alex J AU - Bishop, Joseph E AU - Dewers, Thomas Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 2292 EP - 2308 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 120 IS - 4 SN - 2169-9313, 2169-9313 KW - limestone KW - Mississippian KW - shear strength KW - experimental studies KW - Paleozoic KW - Carboniferous KW - mechanical properties KW - rock mechanics KW - laboratory studies KW - fractures KW - sedimentary rocks KW - cracks KW - Indiana Limestone KW - carbonate rocks KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780804989?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Fracture+propagation+in+Indiana+Limestone+interpreted+via+linear+softening+cohesive+fracture+model&rft.au=Rinehart%2C+Alex+J%3BBishop%2C+Joseph+E%3BDewers%2C+Thomas&rft.aulast=Rinehart&rft.aufirst=Alex&rft.date=2015-04-01&rft.volume=120&rft.issue=4&rft.spage=2292&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2F2014JB011624 L2 - http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/(ISSN)2169-9356/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 30 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2016-04-14 N1 - SubjectsTermNotLitGenreText - carbonate rocks; Carboniferous; cracks; experimental studies; fractures; Indiana Limestone; laboratory studies; limestone; mechanical properties; Mississippian; Paleozoic; rock mechanics; sedimentary rocks; shear strength DO - http://dx.doi.org/10.1002/2014JB011624 ER - TY - JOUR T1 - High performance simulation of environmental tracers in heterogeneous domains AN - 1739085619; 2015-114743 AB - In this study, we use PFLOTRAN, a highly scalable, parallel, flow, and reactive transport code to simulate the concentrations of (super 3) H, (super 3) He, CFC-11, CFC-12, CFC-113, SF (sub 6) , (super 39) Ar, and the mean groundwater age in heterogeneous fields on grids with an excess of 10 million nodes. We utilize this computational platform to simulate the concentration of multiple tracers in high-resolution, heterogeneous 2D and 3D domains, and calculate tracer-derived ages. Tracer-derived ages show systematic biases toward younger ages when the groundwater age distribution contains water older than the maximum tracer age. The deviation of the tracer-derived age distribution from the true groundwater age distribution increases with increasing heterogeneity of the system. However, the effect of heterogeneity is diminished as the mean travel time gets closer to the tracer age limit. Age distributions in 3D domains differ significantly from 2D domains. 3D simulations show decreased mean age, and less variance in age distribution for identical heterogeneity statistics. High-performance computing allows for investigation of tracer and groundwater age systematics in high-resolution domains, providing a platform for understanding and utilizing environmental tracer and groundwater age information in heterogeneous 3D systems. Abstract Copyright (2013), , National Ground Water Association. JF - Ground Water AU - Gardner, William P AU - Hammond, Glenn AU - Lichtner, Peter AU - Cook, Peter G Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 71 EP - 80 PB - Wiley-Blackwell on behalf of National Ground Water Association, Westerville, OH VL - 53 IS - S1 SN - 0017-467X, 0017-467X KW - PFLOTRAN KW - isotopes KW - H-3/He-3 KW - environmental tracers KW - data processing KW - tritium KW - He-3 KW - preferential flow KW - simulation KW - stable isotopes KW - chlorofluorocarbons KW - ground water KW - Ar-39 KW - radioactive isotopes KW - transport KW - dates KW - noble gases KW - tracers KW - reactive transport KW - halogenated hydrocarbons KW - helium KW - high-resolution methods KW - numerical models KW - three-dimensional models KW - two-dimensional models KW - argon KW - models KW - computer programs KW - organic compounds KW - hydrogen KW - permeability KW - 21:Hydrogeology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739085619?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ground+Water&rft.atitle=High+performance+simulation+of+environmental+tracers+in+heterogeneous+domains&rft.au=Gardner%2C+William+P%3BHammond%2C+Glenn%3BLichtner%2C+Peter%3BCook%2C+Peter+G&rft.aulast=Gardner&rft.aufirst=William&rft.date=2015-04-01&rft.volume=53&rft.issue=S1&rft.spage=71&rft.isbn=&rft.btitle=&rft.title=Ground+Water&rft.issn=0017467X&rft_id=info:doi/10.1111%2Fgwat.12148 L2 - http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1745-6584 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 22 N1 - PubXState - OH N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-10-25 N1 - CODEN - GRWAAP N1 - SubjectsTermNotLitGenreText - Ar-39; argon; chlorofluorocarbons; computer programs; data processing; dates; environmental tracers; ground water; H-3/He-3; halogenated hydrocarbons; He-3; helium; high-resolution methods; hydrogen; isotopes; models; noble gases; numerical models; organic compounds; permeability; PFLOTRAN; preferential flow; radioactive isotopes; reactive transport; simulation; stable isotopes; three-dimensional models; tracers; transport; tritium; two-dimensional models DO - http://dx.doi.org/10.1111/gwat.12148 ER - TY - JOUR T1 - A multiscale control volume finite element method for advection-diffusion equations AN - 1668256973; PQ0001249117 AB - We present a new stabilized method for advection-diffusion equations, which combines a control volume FEM formulation of the governing equations with a novel multiscale approximation of the total flux. The latter incorporates information about the exact solution that cannot be represented on the mesh. To define this flux, we solve the governing equations along suitable mesh segments under the assumption that the flux varies linearly along these segments. This procedure yields second-order accurate fluxes on the edges of the mesh. Then, we use curl-conforming elements of the same order to lift these edge fluxes into the mesh elements. In so doing, we obtain a stabilized control volume FEM formulation that is second-order accurate and does not require mesh-dependent stabilization parameters. Numerical convergence studies on uniform and nonuniform grids along with several standard advection tests illustrate the computational properties of the new method. Published 2015. This article is a U.S. Government work and is in the public domain in the USA. We present a new parameter-free stabilized control volume finite element method for advection-diffusion equations. The method is based on H(curl)-lifting of second-order accurate upwind edge fluxes into multi-scale elemental fluxes. The former are defined by solving one dimensional versions of the equations on mesh edges. JF - International Journal for Numerical Methods in Fluids AU - Bochev, Pavel AU - Peterson, Kara AU - Perego, Mauro AD - Computational Mathematics Department, Sandia National Laboratories, Mail Stop 1320, Albuquerque, NM, 87185-1320, USA. Y1 - 2015/04// PY - 2015 DA - April 2015 SP - 641 EP - 667 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 77 IS - 11 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Testing Procedures KW - Finite element method KW - Mathematical models KW - Stabilizing KW - Advection KW - USA KW - Yield KW - Finite Element Method KW - Fluid dynamics KW - Standards KW - Fluctuations KW - Q2 09142:Methods and instruments KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668256973?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+for+Numerical+Methods+in+Fluids&rft.atitle=A+multiscale+control+volume+finite+element+method+for+advection-diffusion+equations&rft.au=Bochev%2C+Pavel%3BPeterson%2C+Kara%3BPerego%2C+Mauro&rft.aulast=Bochev&rft.aufirst=Pavel&rft.date=2015-04-01&rft.volume=77&rft.issue=11&rft.spage=641&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.3998 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Finite element method; Mathematical models; Fluid dynamics; Stabilizing; Testing Procedures; Yield; Finite Element Method; Standards; Fluctuations; Advection; USA DO - http://dx.doi.org/10.1002/fld.3998 ER - TY - CPAPER T1 - Understanding the Surface Environment and Its Impact on the Extended Performance of Interim Storage T2 - 2015 International Annual Conference and Exposition of National Association of Corrosion Engineering (CORROSION 2015) AN - 1684403882; 6349520 JF - 2015 International Annual Conference and Exposition of National Association of Corrosion Engineering (CORROSION 2015) AU - Enos, David AU - Bryan, Charles Y1 - 2015/03/15/ PY - 2015 DA - 2015 Mar 15 KW - Storage UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1684403882?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2015+International+Annual+Conference+and+Exposition+of+National+Association+of+Corrosion+Engineering+%28CORROSION+2015%29&rft.atitle=Understanding+the+Surface+Environment+and+Its+Impact+on+the+Extended+Performance+of+Interim+Storage&rft.au=Enos%2C+David%3BBryan%2C+Charles&rft.aulast=Enos&rft.aufirst=David&rft.date=2015-03-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2015+International+Annual+Conference+and+Exposition+of+National+Association+of+Corrosion+Engineering+%28CORROSION+2015%29&rft.issn=&rft_id=info:doi/ L2 - http://corrosionfp.epubxp.com/t/165607-corrosion-2015-final-program LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-05-29 N1 - Last updated - 2015-06-01 ER - TY - JOUR T1 - Artificial viscosity: back to the basics AN - 1664201540; PQ0001180133 AB - In this paper, we take a different perspective on the derivation of artificial viscosity. Heretofore, the development of artificial viscosity has been based on the paper published in Journal of Applied Physics in 1950 authored by John von Neumann and Robert Richtmyer[1]. Earlier, in 1948, Richtmyer published a report at Los Alamos Scientific Laboratory documenting the original concept[2]. This report was the true origin of shock capturing methods and contains several key ideas that are conceptually different than the 1950 journal article. Unfortunately, this report (LA-671) was classified until 1993. This has resulted in two issues: the misattribution of the invention of artificial viscosity as primarily being the work of von Neumann and the loss of the structurally different ideas in the original report. We seek to right the record of history here and use the ideas contained in Richtmyer's report to good effect in deriving a new shock viscosity. The focus of previous development has been the Hugoniot curve describing the locus of states connected by a single shock wave. Here we follow a path more focused upon the Rayleigh line, which is strongly guided by Richtmyer's line of development of the original artificial viscosity formulation. We provide an implementation of the method resulting from this perspective and computational results for simple shock problems. Copyright copyright 2014 John Wiley & Sons, Ltd. This paper provides a major clarification of the historical record regarding the development of artificial viscosity by identifying the correct original description of the method, which had been classified until 1993. Using the original development of the method, we derive a distinct method combining its ideas with modern thermodynamic concepts. This new method is demonstrated on several example problems showing the viability of the ideas for further development. JF - International Journal for Numerical Methods in Fluids AU - Mattsson, Ann E AU - Rider, W J AD - Sandia National Laboratories, Albuquerque, NM 87185, USA. Y1 - 2015/03// PY - 2015 DA - March 2015 SP - 400 EP - 417 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 77 IS - 7 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Thermodynamics KW - Laboratories KW - USA, New Mexico, Los Alamos KW - Viscosity KW - History KW - Fluid dynamics KW - Waves KW - Clarification KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - Q2 09102:Institutes and organizations UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664201540?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+for+Numerical+Methods+in+Fluids&rft.atitle=Artificial+viscosity%3A+back+to+the+basics&rft.au=Mattsson%2C+Ann+E%3BRider%2C+W+J&rft.aulast=Mattsson&rft.aufirst=Ann&rft.date=2015-03-01&rft.volume=77&rft.issue=7&rft.spage=400&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.3981 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Thermodynamics; Fluid dynamics; Viscosity; History; Laboratories; Waves; Clarification; USA, New Mexico, Los Alamos DO - http://dx.doi.org/10.1002/fld.3981 ER - TY - JOUR T1 - Composite WO3/TiO2 nanostructures for high electrochromic activity. AN - 1652458402; 25562778 AB - A composite material consisting of TiO2 nanotubes (NT) with WO3 electrodeposited on its surface has been fabricated, detached from its Ti substrate, and attached to a fluorine-doped tin oxide (FTO) film on glass for application to electrochromic (EC) reactions. Several adhesion layers were tested, finding that a paste of TiO2 made from commercially available TiO2 nanoparticles creates an interface for the TiO2 NT film to attach to the FTO glass, which is conductive and does not cause solution-phase ions in an electrolyte to bind irreversibly with the material. The effect of NT length and WO3 concentration on the EC performance were studied. The composite WO3/TiO2 nanostructures showed higher ion storage capacity, better stability, enhanced EC contrast, and longer memory time compared with the pure WO3 and TiO2 materials. JF - ACS applied materials & interfaces AU - Reyes-Gil, Karla R AU - Stephens, Zachary D AU - Stavila, Vitalie AU - Robinson, David B AD - Sandia National Laboratories , P.O. Box 969, Livermore, California 94551, United States. Y1 - 2015/02/04/ PY - 2015 DA - 2015 Feb 04 SP - 2202 EP - 2213 VL - 7 IS - 4 KW - reflectance devices KW - WO3 electrodeposition KW - TiO2 nanotubes KW - electrochromism KW - WO3 nanostructures KW - Ti anodization KW - composites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1652458402?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+applied+materials+%26+interfaces&rft.atitle=Composite+WO3%2FTiO2+nanostructures+for+high+electrochromic+activity.&rft.au=Reyes-Gil%2C+Karla+R%3BStephens%2C+Zachary+D%3BStavila%2C+Vitalie%3BRobinson%2C+David+B&rft.aulast=Reyes-Gil&rft.aufirst=Karla&rft.date=2015-02-04&rft.volume=7&rft.issue=4&rft.spage=2202&rft.isbn=&rft.btitle=&rft.title=ACS+applied+materials+%26+interfaces&rft.issn=1944-8252&rft_id=info:doi/10.1021%2Fam5050696 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-04-23 N1 - Date created - 2015-02-05 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/am5050696 ER - TY - JOUR T1 - Reducing computation in an i-vector speaker recognition system using a tree-structured universal background model AN - 1708507416; 201510463 AB - The majority of state-of-the-art speaker recognition systems (SR) utilize speaker models that are derived from an adapted universal background model (UBM) in the form of a Gaussian mixture model (GMM). This is true for GMM supervector systems, joint factor analysis systems, and most recently i-vector systems. In all of these systems, the posterior probabilities and sufficient statistics calculations represent a computational bottleneck in both enrollment and testing. We propose a multi-layered hash system, employing a tree-structured GMM-UBM which uses Runnalls' Gaussian mixture reduction technique, in order to reduce the number of these calculations. With this tree-structured hash, we can trade-off reduction in computation with a corresponding degradation of equal error rate (EER). As an example, we reduce this computation by a factor of 15x while incurring less than 10% relative degradation of EER (or 0.3% absolute EER) when evaluated with NIST 2010 speaker recognition evaluation (SRE) telephone data. [Copyright Elsevier B.V.] JF - Speech Communication AU - McClanahan, Richard AU - De Leon, Phillip L AD - Sandia National Laboratories, Albuquerque, NM, USA; New Mexico State University, Las Cruces, NM, USA rmcclan@sandia.gov Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 36 EP - 46 VL - 66 IS - Feb SN - 0167-6393, 0167-6393 KW - Speaker Identification (82000) KW - Telephone (88280) KW - Statistical Analysis (83850) KW - article KW - 6111: phonetics; speech synthesis/recognition UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1708507416?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Allba&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Speech+Communication&rft.atitle=Reducing+computation+in+an+i-vector+speaker+recognition+system+using+a+tree-structured+universal+background+model&rft.au=McClanahan%2C+Richard%3BDe+Leon%2C+Phillip+L&rft.aulast=McClanahan&rft.aufirst=Richard&rft.date=2015-02-01&rft.volume=66&rft.issue=Feb&rft.spage=36&rft.isbn=&rft.btitle=&rft.title=Speech+Communication&rft.issn=01676393&rft_id=info:doi/ LA - English DB - Linguistics and Language Behavior Abstracts (LLBA) N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-09-27 N1 - CODEN - SCOMDH N1 - SubjectsTermNotLitGenreText - Speaker Identification (82000); Telephone (88280); Statistical Analysis (83850) ER - TY - JOUR T1 - Multiporosity flow in fractured low-permeability rocks AN - 1668244988; PQ0001282070 AB - A multiporosity extension of classical double and triple-porosity fractured rock flow models for slightly compressible fluids is presented. The multiporosity model is an adaptation of the multirate solute transport model of Haggerty and Gorelick (1995) to viscous flow in fractured rock reservoirs. It is a generalization of both pseudo steady state and transient interporosity flow double-porosity models. The model includes a fracture continuum and an overlapping distribution of multiple rock matrix continua, whose fracture-matrix exchange coefficients are specified through a discrete probability mass function. Semianalytical cylindrically symmetric solutions to the multiporosity mathematical model are developed using the Laplace transform to illustrate its behavior. The multiporosity model presented here is conceptually simple, yet flexible enough to simulate common conceptualizations of double and triple-porosity flow. This combination of generality and simplicity makes the multiporosity model a good choice for flow modelling in low-permeability fractured rocks. Key Points: * New conceptual model generalizing dual porosity flow in fractured rocks * Multiporosity model is generalization of existing well-known models * Semianalytical radially symmetric solutions presented for new conceptual model JF - Water Resources Research AU - Kuhlman, Kristopher L AU - Malama, Bwalya AU - Heath, Jason E AD - Applied Systems Analysis and Research Department, Sandia National Laboratories, Albuquerque, New Mexico, USA. Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 848 EP - 860 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 51 IS - 2 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Water resources KW - Solutes KW - Adaptation KW - Reservoirs KW - Exchange coefficients KW - Geologic Fractures KW - Adaptations KW - Mathematical models KW - Probability Distribution KW - Porosity KW - Fractures KW - Model Studies KW - Exchange coefficient KW - Viscous Flow KW - Behavior KW - Solute Transport KW - Water resources research KW - SW 5010:Network design KW - M2 556.18:Water Management (556.18) KW - Q2 09182:Methods and instruments KW - AQ 00005:Underground Services and Water Use UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668244988?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Multiporosity+flow+in+fractured+low-permeability+rocks&rft.au=Kuhlman%2C+Kristopher+L%3BMalama%2C+Bwalya%3BHeath%2C+Jason+E&rft.aulast=Kuhlman&rft.aufirst=Kristopher&rft.date=2015-02-01&rft.volume=51&rft.issue=2&rft.spage=848&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2014WR016502 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Exchange coefficients; Solutes; Mathematical models; Adaptations; Porosity; Fractures; Water resources; Exchange coefficient; Water resources research; Reservoirs; Geologic Fractures; Behavior; Probability Distribution; Viscous Flow; Solute Transport; Adaptation; Model Studies DO - http://dx.doi.org/10.1002/2014WR016502 ER - TY - JOUR T1 - Subsurface failure in spherical bodies; a formation scenario for linear troughs on Vesta's surface AN - 1660629825; 2015-021722 AB - Many asteroids in the Solar System exhibit unusual, linear features on their surface. The Dawn mission recently observed two sets of linear features on the surface of the asteroid 4 Vesta. Geologic observations indicate that these features are related to the two large impact basins at the south pole of Vesta, though no specific mechanism of origin has been determined. Further, the orientation of the features is offset from the center of the basins. Experimental and numerical results reveal that the offset angle is a natural consequence of oblique impacts into a spherical target. Here we demonstrate that a set of shear planes develops in the subsurface of the body opposite to the point of first contact. These subsurface failure zones then propagate to the surface under combined tensile-shear stress fields after the impact to create sets of approximately linear faults on the surface. Comparison between the orientation of damage structures in the laboratory and failure regions within Vesta can be used to constrain impact parameters (e.g., the approximate impact point and likely impact trajectory). JF - Icarus AU - Stickle, Angela M AU - Schultz, P H AU - Crawford, D A Y1 - 2015/02// PY - 2015 DA - February 2015 SP - 18 EP - 34 PB - Elsevier, New York, NY VL - 247 SN - 0019-1035, 0019-1035 KW - cratering KW - asteroids KW - shear stress KW - Rheasilvia Basin KW - fracturing KW - simulation KW - Dawn Mission KW - laboratory studies KW - hypervelocity impacts KW - surface features KW - faults KW - orientation KW - failures KW - experimental studies KW - shock waves KW - lineaments KW - numerical models KW - Vesta Asteroid KW - strength KW - damage KW - trajectories KW - stress fields KW - impacts KW - deformation KW - shear KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660629825?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=Subsurface+failure+in+spherical+bodies%3B+a+formation+scenario+for+linear+troughs+on+Vesta%27s+surface&rft.au=Stickle%2C+Angela+M%3BSchultz%2C+P+H%3BCrawford%2C+D+A&rft.aulast=Stickle&rft.aufirst=Angela&rft.date=2015-02-01&rft.volume=247&rft.issue=&rft.spage=18&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2014.10.002 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 89 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2015-03-05 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - asteroids; cratering; damage; Dawn Mission; deformation; experimental studies; failures; faults; fracturing; hypervelocity impacts; impacts; laboratory studies; lineaments; numerical models; orientation; Rheasilvia Basin; shear; shear stress; shock waves; simulation; strength; stress fields; surface features; trajectories; Vesta Asteroid DO - http://dx.doi.org/10.1016/j.icarus.2014.10.002 ER - TY - JOUR T1 - A droplet-to-digital (D2D) microfluidic device for single cell assays. AN - 1629968152; 25354549 AB - We have developed a new hybrid droplet-to-digital microfluidic platform (D2D) that integrates droplet-in-channel microfluidics with digital microfluidics (DMF) for performing multi-step assays. This D2D platform combines the strengths of the two formats-droplets-in-channel for facile generation of droplets containing single cells, and DMF for on-demand manipulation of droplets including control of different droplet volumes (pL-μL), creation of a dilution series of ionic liquid (IL), and parallel single cell culturing and analysis for IL toxicity screening. This D2D device also allows for automated analysis that includes a feedback-controlled system for merging and splitting of droplets to add reagents, an integrated Peltier element for parallel cell culture at optimum temperature, and an impedance sensing mechanism to control the flow rate for droplet generation and preventing droplet evaporation. Droplet-in-channel is well-suited for encapsulation of single cells as it allows the careful manipulation of flow rates of aqueous phase containing cells and oil to optimize encapsulation. Once single cell containing droplets are generated, they are transferred to a DMF chip via a capillary where they are merged with droplets containing IL and cultured at 30 °C. The DMF chip, in addition to permitting cell culture and reagent (ionic liquid/salt) addition, also allows recovery of individual droplets for off-chip analysis such as further culturing and measurement of ethanol production. The D2D chip was used to evaluate the effect of IL/salt type (four types: NaOAc, NaCl, [C2mim] [OAc], [C2mim] [Cl]) and concentration (four concentrations: 0, 37.5, 75, 150 mM) on the growth kinetics and ethanol production of yeast and as expected, increasing IL concentration led to lower biomass and ethanol production. Specifically, [C2mim] [OAc] had inhibitory effects on yeast growth at concentrations 75 and 150 mM and significantly reduced their ethanol production compared to cells grown in other ILs/salts. The growth curve trends obtained by D2D matched conventional yeast culturing in microtiter wells, validating the D2D platform. We believe that our approach represents a generic platform for multi-step biochemical assays such as drug screening, digital PCR, enzyme assays, immunoassays and cell-based assays. JF - Lab on a chip AU - Shih, Steve C C AU - Gach, Philip C AU - Sustarich, Jess AU - Simmons, Blake A AU - Adams, Paul D AU - Singh, Seema AU - Singh, Anup K AD - Sandia National Laboratories, 7011 East Ave, Livermore, CA, USA. aksingh@sandia.gov. Y1 - 2015/01/07/ PY - 2015 DA - 2015 Jan 07 SP - 225 EP - 236 VL - 15 IS - 1 KW - Ionic Liquids KW - 0 KW - Ethanol KW - 3K9958V90M KW - Index Medicus KW - Equipment Design KW - Saccharomyces cerevisiae -- metabolism KW - Ionic Liquids -- chemistry KW - Ethanol -- analysis KW - Ethanol -- metabolism KW - Single-Cell Analysis -- methods KW - Microfluidic Analytical Techniques -- methods KW - Single-Cell Analysis -- instrumentation KW - Tissue Array Analysis -- methods KW - Microfluidic Analytical Techniques -- instrumentation KW - Tissue Array Analysis -- instrumentation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629968152?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Lab+on+a+chip&rft.atitle=A+droplet-to-digital+%28D2D%29+microfluidic+device+for+single+cell+assays.&rft.au=Shih%2C+Steve+C+C%3BGach%2C+Philip+C%3BSustarich%2C+Jess%3BSimmons%2C+Blake+A%3BAdams%2C+Paul+D%3BSingh%2C+Seema%3BSingh%2C+Anup+K&rft.aulast=Shih&rft.aufirst=Steve+C&rft.date=2015-01-07&rft.volume=15&rft.issue=1&rft.spage=225&rft.isbn=&rft.btitle=&rft.title=Lab+on+a+chip&rft.issn=1473-0189&rft_id=info:doi/10.1039%2Fc4lc00794h LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-08-04 N1 - Date created - 2014-12-03 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1039/c4lc00794h ER - TY - JOUR T1 - SPA-impact origin for the nearside dike system on the Moon AN - 1832671856; 726459-62 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Schultz, Peter H AU - Crawford, D A AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2416 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - nearside KW - numerical models KW - Moon KW - lithosphere KW - GRAIL Mission KW - trajectories KW - impacts KW - Ocean of Storms KW - extension KW - South Pole-Aitken Basin KW - gravity anomalies KW - fractures KW - intrusions KW - dikes KW - contraction KW - oblique orientation KW - Sea of Rains KW - Procellarum KREEP Terrane KW - cooling KW - Bouguer anomalies KW - antipode KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832671856?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=SPA-impact+origin+for+the+nearside+dike+system+on+the+Moon&rft.au=Schultz%2C+Peter+H%3BCrawford%2C+D+A%3BAnonymous&rft.aulast=Schultz&rft.aufirst=Peter&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2416.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Number of references - 12 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on May 6, 2016 N1 - Last updated - 2017-01-24 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - antipode; Bouguer anomalies; contraction; cooling; dikes; extension; fractures; GRAIL Mission; gravity anomalies; impacts; intrusions; lithosphere; Moon; nearside; numerical models; oblique orientation; Ocean of Storms; Procellarum KREEP Terrane; Sea of Rains; South Pole-Aitken Basin; trajectories ER - TY - JOUR T1 - Macroscopic and microscopic lithologic controls on mechanical properties of mudstones AN - 1832654581; 781355-8 JF - Abstracts: Annual Meeting - American Association of Petroleum Geologists AU - Grigg, Joseph J AU - Yoon, Hongkyu AU - Mozley, Peter AU - Heath, Jason AU - Dewers, Thomas AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 PB - American Association of Petroleum Geologists and Society for Sedimentary Geology, Tulsa, OK VL - 2015 KW - petroleum exploration KW - well stimulation KW - Cretaceous KW - petroleum KW - elastic waves KW - reservoir rocks KW - controls KW - sedimentary rocks KW - velocity KW - heterogeneity KW - North America KW - mudstone KW - cartography KW - Mancos Shale KW - mechanical properties KW - porosity KW - Mesozoic KW - lithofacies KW - microscope methods KW - petrography KW - seismic waves KW - kerogen KW - clastic rocks KW - minerals KW - 06A:Sedimentary petrology KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832654581?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts%3A+Annual+Meeting+-+American+Association+of+Petroleum+Geologists&rft.atitle=Macroscopic+and+microscopic+lithologic+controls+on+mechanical+properties+of+mudstones&rft.au=Grigg%2C+Joseph+J%3BYoon%2C+Hongkyu%3BMozley%2C+Peter%3BHeath%2C+Jason%3BDewers%2C+Thomas%3BAnonymous&rft.aulast=Grigg&rft.aufirst=Joseph&rft.date=2015-01-01&rft.volume=2015&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts%3A+Annual+Meeting+-+American+Association+of+Petroleum+Geologists&rft.issn=&rft_id=info:doi/ L2 - http://www.searchanddiscovery.com/abstracts/html/2015/90216ace/abstracts/2104237.html LA - English DB - GeoRef N1 - Conference title - 2015 AAPG annual convention & exhibition N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - OK N1 - Last updated - 2017-01-24 N1 - CODEN - #06983 N1 - SubjectsTermNotLitGenreText - cartography; clastic rocks; controls; Cretaceous; elastic waves; heterogeneity; kerogen; lithofacies; Mancos Shale; mechanical properties; Mesozoic; microscope methods; minerals; mudstone; North America; petrography; petroleum; petroleum exploration; porosity; reservoir rocks; sedimentary rocks; seismic waves; velocity; well stimulation ER - TY - JOUR T1 - Mixing-controlled reactive transport at the pore scale and its impact on flow field and upscaling of reactive transport AN - 1797535264; 2016-052822 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Yoon, H AU - Dewers, T AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 3534 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - United States KW - site exploration KW - gas storage KW - solution KW - seepage KW - reservoir rocks KW - ground water KW - carbon dioxide KW - chemical reactions KW - transport KW - Crystal Geyser KW - mixing KW - velocity KW - reactive transport KW - hydrodynamics KW - calcium carbonate KW - geochemistry KW - experimental studies KW - carbon sequestration KW - Colorado Plateau KW - three-dimensional models KW - fluid flow KW - porosity KW - aquifers KW - models KW - precipitation KW - natural analogs KW - Utah KW - 30:Engineering geology KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1797535264?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Mixing-controlled+reactive+transport+at+the+pore+scale+and+its+impact+on+flow+field+and+upscaling+of+reactive+transport&rft.au=Yoon%2C+H%3BDewers%2C+T%3BAnonymous&rft.aulast=Yoon&rft.aufirst=H&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=3534&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/3534.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt conference 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-06-17 N1 - SubjectsTermNotLitGenreText - aquifers; calcium carbonate; carbon dioxide; carbon sequestration; chemical reactions; Colorado Plateau; Crystal Geyser; experimental studies; fluid flow; gas storage; geochemistry; ground water; hydrodynamics; mixing; models; natural analogs; porosity; precipitation; reactive transport; reservoir rocks; seepage; site exploration; solution; three-dimensional models; transport; United States; Utah; velocity ER - TY - JOUR T1 - Partitioning of fission products (Cs, Sr and I) into salt phases AN - 1793208175; 2016-048706 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Icenhower, J P AU - Kirkes, L D AU - Marrs, C R AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 1359 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - United States KW - halides KW - ion probe data KW - isotopes KW - Eddy County New Mexico KW - halogens KW - mass spectra KW - New Mexico KW - stable isotopes KW - carnallite KW - radioactive waste KW - ground water KW - electron probe data KW - partitioning KW - iodine KW - sedimentary rocks KW - radioactive isotopes KW - cesium KW - gypsum KW - chlorides KW - spectra KW - Waste Isolation Pilot Plant KW - polyhalite KW - fission KW - alkaline earth metals KW - experimental studies KW - chemically precipitated rocks KW - sulfates KW - isotope ratios KW - alkali metals KW - evaporites KW - ICP mass spectra KW - Sr-87/Sr-86 KW - metals KW - waste disposal KW - southeastern New Mexico KW - strontium KW - langbeinite KW - salt KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793208175?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Partitioning+of+fission+products+%28Cs%2C+Sr+and+I%29+into+salt+phases&rft.au=Icenhower%2C+J+P%3BKirkes%2C+L+D%3BMarrs%2C+C+R%3BAnonymous&rft.aulast=Icenhower&rft.aufirst=J&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=1359&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/1359.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt conference 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 2 N1 - Last updated - 2016-06-02 N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; carnallite; cesium; chemically precipitated rocks; chlorides; Eddy County New Mexico; electron probe data; evaporites; experimental studies; fission; ground water; gypsum; halides; halogens; ICP mass spectra; iodine; ion probe data; isotope ratios; isotopes; langbeinite; mass spectra; metals; New Mexico; partitioning; polyhalite; radioactive isotopes; radioactive waste; salt; sedimentary rocks; southeastern New Mexico; spectra; Sr-87/Sr-86; stable isotopes; strontium; sulfates; United States; waste disposal; Waste Isolation Pilot Plant ER - TY - JOUR T1 - "Switching on" Fe(III) in the octahedral sheet of Fe-phyllosilicate AN - 1793205101; 2016-048712 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Ilgen, A AU - Kruichak, J AU - Cerrato, J AU - Artyushkova, K AU - Argo, J AU - Washington, R AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 1365 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - silicates KW - crystal structure KW - nontronite KW - iron KW - ferrous iron KW - clay minerals KW - ferric iron KW - chemical reactions KW - metals KW - anaerobic environment KW - sheet silicates KW - crystal chemistry KW - Eh KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793205101?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=%22Switching+on%22+Fe%28III%29+in+the+octahedral+sheet+of+Fe-phyllosilicate&rft.au=Ilgen%2C+A%3BKruichak%2C+J%3BCerrato%2C+J%3BArtyushkova%2C+K%3BArgo%2C+J%3BWashington%2C+R%3BAnonymous&rft.aulast=Ilgen&rft.aufirst=A&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=1365&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/1365.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt conference 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-06-02 N1 - SubjectsTermNotLitGenreText - anaerobic environment; chemical reactions; clay minerals; crystal chemistry; crystal structure; Eh; ferric iron; ferrous iron; iron; metals; nontronite; sheet silicates; silicates ER - TY - JOUR T1 - Implications of Modeling Range and Infrastructure Barriers to Adoption of Battery Electric Vehicles AN - 1786199741; PQ0002488454 AB - Compared with traditional vehicles, light-duty battery electric vehicles (BEVs) currently have price premiums and noncost limitations, such as reduced range, sparse public recharging infrastructure, and long recharge times. These additional limitations can be captured in different ways in a consumer choice model. Three approaches are implemented to noncost barrier modeling, and results are compared. A penalty approach quantifies limitations as additional costs to the consumer, and two threshold approaches determine BEV suitability by the frequency that daily driving distance exceeds the vehicle range. GPS-based trip data are used to form ensemble distributions of low-, medium-, and high-intensity driving distances to support the analysis. All approaches show limited (5%) adoption of BEVs by 2050, and the BEV mileage fraction trails the stock fraction because of the use of substitute vehicles for high-mileage trips and adoption biased toward lower driving intensity segments. In fact, a majority of the electrified miles driven stem from plug-in hybrid electric vehicles, not BEVs. Of the BEVs, the powertrains offering 150- to 250-mi ranges are responsible for more than 50% of sales. Results also hint that longer-range BEVs act as primary household vehicles, but lower-range BEVs serve as secondary household vehicles. A parametric exploration shows that mechanisms to mitigate the hardship of the noncost barriers can significantly increase adoption rates but that reducing battery price alone does not. However, these mechanisms can be different for different modeling approaches. JF - Transportation Research Record AU - Barter, Garrett E AU - Tamor, Michael A AU - Manley, Dawn K AU - West, Todd H AD - Sandia National Laboratories, P.O. Box 969, Livermore, CA 94551 gbarter@alum.mit.edu Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 80 EP - 88 PB - Transportation Research Board IS - 2502 SN - 0361-1981, 0361-1981 KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Infrastructure KW - Electric vehicles KW - Barriers KW - Recharging KW - Households KW - Electric batteries KW - Vehicles KW - Consumption UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1786199741?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transportation+Research+Record&rft.atitle=Implications+of+Modeling+Range+and+Infrastructure+Barriers+to+Adoption+of+Battery+Electric+Vehicles&rft.au=Barter%2C+Garrett+E%3BTamor%2C+Michael+A%3BManley%2C+Dawn+K%3BWest%2C+Todd+H&rft.aulast=Barter&rft.aufirst=Garrett&rft.date=2015-01-01&rft.volume=&rft.issue=2502&rft.spage=80&rft.isbn=9780309369237&rft.btitle=&rft.title=Transportation+Research+Record&rft.issn=03611981&rft_id=info:doi/10.3141%2F2502-10 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-05-01 N1 - Number of references - 28 N1 - Last updated - 2016-05-03 DO - http://dx.doi.org/10.3141/2502-10 ER - TY - JOUR T1 - A semi-rigorous sensor model for precision geometric processing of Mini-RF bistatic radar images of the Moon AN - 1784737890; 2016-035589 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Kirk, Randolph L AU - Barrett, J M AU - Wahl, D E AU - Erteza, I AU - Jackowatz, C V AU - Yocky, D A AU - Turner, S AU - Bussey, D B J AU - Paterson, G W AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2507 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - imagery KW - precision KW - radargrammetry KW - Moon KW - Lunar Reconnaissance Orbiter KW - Doppler effect KW - data processing KW - radar methods KW - Mini-RF KW - geometry KW - models KW - distortion KW - errors KW - SAR KW - orbital observations KW - corrections KW - bistatic radar KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1784737890?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=A+semi-rigorous+sensor+model+for+precision+geometric+processing+of+Mini-RF+bistatic+radar+images+of+the+Moon&rft.au=Kirk%2C+Randolph+L%3BBarrett%2C+J+M%3BWahl%2C+D+E%3BErteza%2C+I%3BJackowatz%2C+C+V%3BYocky%2C+D+A%3BTurner%2C+S%3BBussey%2C+D+B+J%3BPaterson%2C+G+W%3BAnonymous&rft.aulast=Kirk&rft.aufirst=Randolph&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/lpsc2015/pdf/2507.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 15 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Sept. 28, 2015 N1 - Last updated - 2016-08-18 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - bistatic radar; corrections; data processing; distortion; Doppler effect; errors; geometry; imagery; Lunar Reconnaissance Orbiter; Mini-RF; models; Moon; orbital observations; precision; radar methods; radargrammetry; SAR ER - TY - JOUR T1 - Target strength as an important consideration for low-speed impacts AN - 1780803763; 2016-033799 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Quintana, S N AU - Schultz, P H AU - Crawford, D A AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 EP - Abstract no. 2727 PB - Lunar and Planetary Science Conference, Houston, TX VL - 46 KW - cratering KW - volcanic rocks KW - asteroids KW - one-dimensional models KW - igneous rocks KW - Mars KW - melts KW - temperature KW - plutonic rocks KW - basalts KW - velocity KW - hydrodynamics KW - dunite KW - shock waves KW - pressure KW - gaseous phase KW - strength KW - impacts KW - ultramafics KW - two-dimensional models KW - terrestrial planets KW - models KW - planets KW - peridotites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780803763?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Target+strength+as+an+important+consideration+for+low-speed+impacts&rft.au=Quintana%2C+S+N%3BSchultz%2C+P+H%3BCrawford%2C+D+A%3BAnonymous&rft.aulast=Quintana&rft.aufirst=S&rft.date=2015-01-01&rft.volume=46&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2015/pdf/2727.pdf LA - English DB - GeoRef N1 - Conference title - 46th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 15 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Oct. 14, 2015 N1 - Last updated - 2016-04-14 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - asteroids; basalts; cratering; dunite; gaseous phase; hydrodynamics; igneous rocks; impacts; Mars; melts; models; one-dimensional models; peridotites; planets; plutonic rocks; pressure; shock waves; strength; temperature; terrestrial planets; two-dimensional models; ultramafics; velocity; volcanic rocks ER - TY - JOUR T1 - The role of zeolite phase transformations in nuclear repository engineered barrier systems AN - 1780802563; 2016-032076 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Caporuscio, F A AU - Cheshire, M AU - Jove-Colon, C AU - Anonymous Y1 - 2015 PY - 2015 DA - 2015 SP - 463 PB - Goldschmidt Conference, [varies] VL - 25 SN - 1042-7287, 1042-7287 KW - silicates KW - alteration KW - sorption KW - isotopes KW - stability KW - solution KW - radioactive waste KW - illitization KW - ground water KW - sedimentary rocks KW - radioactive isotopes KW - silica KW - clinoptilolite KW - zeolite group KW - framework silicates KW - disposal barriers KW - P-T conditions KW - montmorillonite KW - experimental studies KW - bentonite KW - cementation KW - smectite KW - clay minerals KW - diagenesis KW - brines KW - sheet silicates KW - analcime KW - waste disposal KW - clastic rocks KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780802563?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=The+role+of+zeolite+phase+transformations+in+nuclear+repository+engineered+barrier+systems&rft.au=Caporuscio%2C+F+A%3BCheshire%2C+M%3BJove-Colon%2C+C%3BAnonymous&rft.aulast=Caporuscio&rft.aufirst=F&rft.date=2015-01-01&rft.volume=25&rft.issue=&rft.spage=463&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ L2 - http://goldschmidt.info/2015/uploads/abstracts/finalPDFs/463.pdf LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2015 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-04-14 N1 - SubjectsTermNotLitGenreText - alteration; analcime; bentonite; brines; cementation; clastic rocks; clay minerals; clinoptilolite; diagenesis; disposal barriers; experimental studies; framework silicates; ground water; illitization; isotopes; montmorillonite; P-T conditions; radioactive isotopes; radioactive waste; sedimentary rocks; sheet silicates; silica; silicates; smectite; solution; sorption; stability; waste disposal; zeolite group ER - TY - JOUR T1 - Computer Capability to Substantiate DOE-HDBK-3010 Data AN - 1773842260; PQ0002503108 AB - Safety analysts throughout the U.S. Department of Energy (DOE) complex rely heavily on the data provided in the DOE Handbook, DOE-HDBK-3010 [1] to determine source terms that may be incorporated into the document safety analyses (DSA). Most often, analysts simply take the bounding values due to time constraints or simply to bound calculations. This is a safe approach that helps avoid regulatory critique; however, it may not provide results that are meaningful or relevant to the conditions being evaluated. The derivation of the data, such as airborne release fractions (ARFs) and respirable fractions (RFs) in the Handbook often depend on very limited able-top and bench/laboratory experiments, as well as engineering judgment which may not be well substantiated, and may not be representative of the actual situation. JF - Transactions of the American Nuclear Society AU - Louie, David LY AU - Brown, Alexander L AU - Restrepo, Louis AD - Sandia National Laboratories: 1515 Eubank SE, Albuquerque, NM 87123, dllouie@sandia.gov Y1 - 2015///0, PY - 2015 DA - 0, 2015 SP - 497 EP - 500 PB - American Nuclear Society, Inc. VL - 112 SN - 0003-018X, 0003-018X KW - Health & Safety Science Abstracts KW - Safety engineering KW - Laboratory testing KW - Energy KW - Safety KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773842260?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Computer+Capability+to+Substantiate+DOE-HDBK-3010+Data&rft.au=Louie%2C+David+LY%3BBrown%2C+Alexander+L%3BRestrepo%2C+Louis&rft.aulast=Louie&rft.aufirst=David&rft.date=2015-01-01&rft.volume=112&rft.issue=&rft.spage=497&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Laboratory testing; Safety engineering; Energy; Safety ER - TY - JOUR T1 - Lattice Boltzmann-based approaches for pore-scale reactive transport AN - 1756508581; 2016-005476 JF - Reviews in Mineralogy and Geochemistry AU - Yoon, Hongkyu AU - Kang, Qinjun AU - Valocchi, Albert J AU - Steefel (editor), Carl I AU - Emmanuel (editor), Simon AU - Anovitz (editor), Lawrence M Y1 - 2015 PY - 2015 DA - 2015 SP - 393 EP - 431 PB - Mineralogical Society of America and Geochemical Society, Washington, DC VL - 80 SN - 1529-6466, 1529-6466 KW - solute transport KW - numerical models KW - lattice KW - numerical analysis KW - equations KW - solution KW - porosity KW - ground water KW - theoretical studies KW - transport KW - precipitation KW - biofilms KW - multiphase flow KW - lattice Boltzmann method KW - reactive transport KW - fractals KW - 21:Hydrogeology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756508581?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reviews+in+Mineralogy+and+Geochemistry&rft.atitle=Lattice+Boltzmann-based+approaches+for+pore-scale+reactive+transport&rft.au=Yoon%2C+Hongkyu%3BKang%2C+Qinjun%3BValocchi%2C+Albert+J%3BSteefel+%28editor%29%2C+Carl+I%3BEmmanuel+%28editor%29%2C+Simon%3BAnovitz+%28editor%29%2C+Lawrence+M&rft.aulast=Yoon&rft.aufirst=Hongkyu&rft.date=2015-01-01&rft.volume=80&rft.issue=&rft.spage=393&rft.isbn=&rft.btitle=&rft.title=Reviews+in+Mineralogy+and+Geochemistry&rft.issn=15296466&rft_id=info:doi/10.2138%2Frmg.2015.80.12 L2 - http://www.minsocam.org/MSA/RIM/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2016-01-01 N1 - Number of references - 209 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2016-05-19 N1 - CODEN - RMINDF N1 - SubjectsTermNotLitGenreText - biofilms; equations; fractals; ground water; lattice; lattice Boltzmann method; multiphase flow; numerical analysis; numerical models; porosity; precipitation; reactive transport; solute transport; solution; theoretical studies; transport DO - http://dx.doi.org/10.2138/rmg.2015.80.12 ER - TY - JOUR T1 - Analysis of hydrogen adsorption and surface binding configuration on tungsten using direct recoil spectrometry AN - 1746894273; PQ0002263620 AB - In this work, we apply low energy ion beam analysis to examine directly how the adsorbed hydrogen concentration and binding configuration on W(100) depend on temperature. We exposed the tungsten surface to fluxes of both atomic and molecular H and D. We then probed the H isotopes adsorbed along different crystal directions using 1-2 keV Ne+ ions. At saturation coverage, H occupies two-fold bridge sites on W(100) at 25 [degrees]C. The H coverage dramatically changes the behavior of channeled ions, as does reconstruction of the surface W atoms. For the exposure conditions examined here, we find that surface sites remain populated with H until the surface temperature reaches 200 [degrees]C. After this point, we observe H rapidly desorbing until only a residual concentration remains at 450 [degrees]C. Development of an efficient atomistic model that accurately reproduces the experimental ion energy spectra and azimuthal variation of recoiled H is underway. JF - Journal of Nuclear Materials AU - Kolasinski, R D AU - Hammond, K D AU - Whaley, A AU - Buchenauer, D A AU - Wirth, B D AD - Sandia National Laboratories, Hydrogen and Metallurgical Science Department, Livermore, CA 94551, USA, rkolasi@sandia.gov PY - 2015 SP - 1053 EP - 1056 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 463 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Ions KW - Isotopes KW - Behavior KW - Energy KW - Radioactive materials KW - Temperature KW - Adsorption KW - Hydrogen KW - Tungsten KW - Spectrometry KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1746894273?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Analysis+of+hydrogen+adsorption+and+surface+binding+configuration+on+tungsten+using+direct+recoil+spectrometry&rft.au=Kolasinski%2C+R+D%3BHammond%2C+K+D%3BWhaley%2C+A%3BBuchenauer%2C+D+A%3BWirth%2C+B+D&rft.aulast=Kolasinski&rft.aufirst=R&rft.date=2015-01-01&rft.volume=463&rft.issue=&rft.spage=1053&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2014.11.115 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-12-01 N1 - Number of references - 12 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Ions; Isotopes; Behavior; Energy; Radioactive materials; Adsorption; Temperature; Hydrogen; Spectrometry; Tungsten DO - http://dx.doi.org/10.1016/j.jnucmat.2014.11.115 ER - TY - JOUR T1 - Recent sheath physics studies on DIII-D AN - 1746885131; PQ0002263479 AB - A study to examine some current issues in the physics of the plasma sheath has been recently carried out in DIII-D low power Ohmic plasmas using both flush and domed Langmuir probes, divertor Thomson scattering (DTS), an infrared camera (IRTV), and a new calorimeter triple probe assembly mounted on the Divertor Materials Evaluation System (DIMES). The sheath power transmission factor was found to be consistent with the theoretically predicted value of 7 (+ or -2) for low power plasmas. Using this factor, the three heat flux profiles derived from the LP, DTS, and calorimeter diagnostic measurements agree. Comparison of flush and domed Langmuir probes and divertor Thomson scattering indicates that proper interpretation of flush probe data to get target plate density and temperature is feasible and could potentially yield accurate measurements of target plate conditions where the probes are located. JF - Journal of Nuclear Materials AU - Watkins, J G AU - Labombard, B AU - Stangeby, P C AU - Lasnier, C J AU - McLean, A G AU - Nygren, R E AU - Boedo, J A AU - Leonard, A W AU - Rudakov, D L AD - Sandia National Laboratories, PO Box 969, Livermore, CA 94551, USA, watkins@fusion.gat.com PY - 2015 SP - 436 EP - 439 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 463 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Radioactive materials KW - Temperature KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1746885131?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Recent+sheath+physics+studies+on+DIII-D&rft.au=Watkins%2C+J+G%3BLabombard%2C+B%3BStangeby%2C+P+C%3BLasnier%2C+C+J%3BMcLean%2C+A+G%3BNygren%2C+R+E%3BBoedo%2C+J+A%3BLeonard%2C+A+W%3BRudakov%2C+D+L&rft.aulast=Watkins&rft.aufirst=J&rft.date=2015-01-01&rft.volume=463&rft.issue=&rft.spage=436&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2014.12.109 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-12-01 N1 - Number of references - 16 N1 - Last updated - 2015-12-23 N1 - SubjectsTermNotLitGenreText - Radioactive materials; Temperature DO - http://dx.doi.org/10.1016/j.jnucmat.2014.12.109 ER - TY - CPAPER T1 - Proppant effects on maintaining fracture permeability in shale. T2 - 47th American Geophysical Union Fall Meeting AN - 1651745522; 6332727 JF - 47th American Geophysical Union Fall Meeting AU - Ingraham, Mathew AU - Bauer, Stephen AU - Bolintineanu, Daniel AU - Rao, Rekha AU - Lechman, Jeremy AU - Romero, Joseph Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Permeability KW - Fractures KW - Shale UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651745522?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Proppant+effects+on+maintaining+fracture+permeability+in+shale.&rft.au=Ingraham%2C+Mathew%3BBauer%2C+Stephen%3BBolintineanu%2C+Daniel%3BRao%2C+Rekha%3BLechman%2C+Jeremy%3BRomero%2C+Joseph&rft.aulast=Ingraham&rft.aufirst=Mathew&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Contribution of Oil and Gas Production to Atmospheric CH4 in the South-Central United States: Reconciling Bottom-up and Top-down Estimates T2 - 47th American Geophysical Union Fall Meeting AN - 1651743448; 6331842 JF - 47th American Geophysical Union Fall Meeting AU - Liu, Zhen AU - Pinto, Joseph AU - Turner, Alexander AU - Bruhwiler, Lori AU - Henze, Daven AU - Brioude, Jerome AU - Bousserez, Nicolas AU - Sargsyan, Khachik AU - Safta, Cosmin AU - Najm, Habib AU - LaFranchi, Brian AU - Bambha, Ray AU - Michelsen, Hope Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Methane KW - USA KW - Oil and gas production UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651743448?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Contribution+of+Oil+and+Gas+Production+to+Atmospheric+CH4+in+the+South-Central+United+States%3A+Reconciling+Bottom-up+and+Top-down+Estimates&rft.au=Liu%2C+Zhen%3BPinto%2C+Joseph%3BTurner%2C+Alexander%3BBruhwiler%2C+Lori%3BHenze%2C+Daven%3BBrioude%2C+Jerome%3BBousserez%2C+Nicolas%3BSargsyan%2C+Khachik%3BSafta%2C+Cosmin%3BNajm%2C+Habib%3BLaFranchi%2C+Brian%3BBambha%2C+Ray%3BMichelsen%2C+Hope&rft.aulast=Liu&rft.aufirst=Zhen&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Compaction and Permeability Reduction of Castlegate Sandstone under Pore Pressure Cycling T2 - 47th American Geophysical Union Fall Meeting AN - 1651743047; 6331392 JF - 47th American Geophysical Union Fall Meeting AU - Bauer, Stephen Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Sandstone KW - Membrane permeability KW - Pore pressure KW - Compaction UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651743047?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Compaction+and+Permeability+Reduction+of+Castlegate+Sandstone+under+Pore+Pressure+Cycling&rft.au=Bauer%2C+Stephen&rft.aulast=Bauer&rft.aufirst=Stephen&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Modelling and Optimization of Nannochloropsis and Chlorella Growth for Various Locations and Seasons T2 - 47th American Geophysical Union Fall Meeting AN - 1651742101; 6331116 JF - 47th American Geophysical Union Fall Meeting AU - Gharagozloo, Patricia Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Growth rate KW - Geographical variations KW - Nannochloropsis KW - Chlorella UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651742101?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Modelling+and+Optimization+of+Nannochloropsis+and+Chlorella+Growth+for+Various+Locations+and+Seasons&rft.au=Gharagozloo%2C+Patricia&rft.aulast=Gharagozloo&rft.aufirst=Patricia&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Arctic Storms in a Regionally Refined Atmospheric General Circulation Model T2 - 47th American Geophysical Union Fall Meeting AN - 1651741786; 6334122 JF - 47th American Geophysical Union Fall Meeting AU - Roesler, Erika AU - Taylor, Mark AU - Boslough, Mark AU - Sullivan, Sharon Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Atmospheric circulation KW - Polar environments KW - Storms KW - Arctic KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651741786?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Arctic+Storms+in+a+Regionally+Refined+Atmospheric+General+Circulation+Model&rft.au=Roesler%2C+Erika%3BTaylor%2C+Mark%3BBoslough%2C+Mark%3BSullivan%2C+Sharon&rft.aulast=Roesler&rft.aufirst=Erika&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - An Ice Sheet Model Initialization Procedure for Smooth Coupling with Climate Forcing T2 - 47th American Geophysical Union Fall Meeting AN - 1651741564; 6333676 JF - 47th American Geophysical Union Fall Meeting AU - Perego, Mauro Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Ice KW - Climate KW - Glaciation KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651741564?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=An+Ice+Sheet+Model+Initialization+Procedure+for+Smooth+Coupling+with+Climate+Forcing&rft.au=Perego%2C+Mauro&rft.aulast=Perego&rft.aufirst=Mauro&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - 3D Printing and Digital Rock Physics for the Geosciences T2 - 47th American Geophysical Union Fall Meeting AN - 1651740515; 6330562 JF - 47th American Geophysical Union Fall Meeting AU - Martinez, Mario AU - Yoon, Hongkyu AU - Dewers, Thomas Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Printing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651740515?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=3D+Printing+and+Digital+Rock+Physics+for+the+Geosciences&rft.au=Martinez%2C+Mario%3BYoon%2C+Hongkyu%3BDewers%2C+Thomas&rft.aulast=Martinez&rft.aufirst=Mario&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - CPAPER T1 - Density Estimation Framework for Model Error Assessment T2 - 47th American Geophysical Union Fall Meeting AN - 1651738509; 6328402 JF - 47th American Geophysical Union Fall Meeting AU - Sargsyan, Khachik AU - Liu, Zhen AU - Najm, Habib AU - Safta, Cosmin AU - VanBloemenWaanders, Bart AU - Michelsen, Hope AU - Bambha, Ray Y1 - 2014/12/15/ PY - 2014 DA - 2014 Dec 15 KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1651738509?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=47th+American+Geophysical+Union+Fall+Meeting&rft.atitle=Density+Estimation+Framework+for+Model+Error+Assessment&rft.au=Sargsyan%2C+Khachik%3BLiu%2C+Zhen%3BNajm%2C+Habib%3BSafta%2C+Cosmin%3BVanBloemenWaanders%2C+Bart%3BMichelsen%2C+Hope%3BBambha%2C+Ray&rft.aulast=Sargsyan&rft.aufirst=Khachik&rft.date=2014-12-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=47th+American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://agu.confex.com/agu/fm14/meetingapp.cgi#ModuleSessionsByDay/0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-01-31 N1 - Last updated - 2015-02-06 ER - TY - JOUR T1 - Practical thermodynamic quantities for aqueous vanadium- and iron-based flow batteries AN - 1642314803; 20842659 AB - A simple method for experimentally determining thermodynamic quantities for flow battery cell reactions is presented. Equilibrium cell potentials, temperature derivatives of cell potential (dE/dT), Gibbs free energies, and entropies are reported here for all-vanadium, iron-vanadium, and iron-chromium flow cells with state-of-the-art solution compositions. Proof is given that formal potentials and formal temperature coefficients can be used with modified forms of the Nernst Equation to quantify the thermodynamics of flow cell reactions as a function of state-of-charge. Such empirical quantities can be used in thermo-electrochemical models of flow batteries at the cell or system level. In most cases, the thermodynamic quantities measured here are significantly different from standard values reported and used previously in the literature. The data reported here are also useful in the selection of operating temperatures for flow battery systems. Because higher temperatures correspond to lower equilibrium cell potentials for the battery chemistries studied here, it can be beneficial to charge a cell at higher temperature and discharge at lower temperature. Proof-of-concept of improved voltage efficiency with the use of such non-isothermal cycling is given for the all-vanadium redox flow battery, and the effect is shown to be more pronounced at lower current densities. JF - Journal of Power Sources AU - Hudak, Nicholas S AD - Advanced Power Sources Research and Development, Sandia National Laboratories, P.O. Box 5800 MS 0613, Albuquerque, NM 87185-0613, USA nhudak@sandia.gov Y1 - 2014/12/10/ PY - 2014 DA - 2014 Dec 10 SP - 962 EP - 974 PB - Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 269 SN - 0378-7753, 0378-7753 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Flow battery KW - Thermodynamics KW - Entropy KW - Formal potential KW - Nernst Equation KW - Non-isothermal KW - Mathematical models KW - Derivatives KW - Current density KW - Operating temperature KW - Electric batteries KW - Charge UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642314803?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Power+Sources&rft.atitle=Practical+thermodynamic+quantities+for+aqueous+vanadium-+and+iron-based+flow+batteries&rft.au=Hudak%2C+Nicholas+S&rft.aulast=Hudak&rft.aufirst=Nicholas&rft.date=2014-12-10&rft.volume=269&rft.issue=&rft.spage=962&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/10.1016%2Fj.jpowsour.2013.12.089 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Last updated - 2016-10-04 DO - http://dx.doi.org/10.1016/j.jpowsour.2013.12.089 ER - TY - JOUR T1 - Complex magnetic fields breathe life into fluids. AN - 1619318844; 25318082 AB - The vast majority of materials research exploits equilibrium or quasi-equilibrium processes to produce inert materials. In contrast, living systems depend on far-from-equilibrium kinetic processes that require a continuous flux of energy to persist and perform useful tasks. The Greek god Hephaestus forged metal automatons that he miraculously animated to perform the tasks of living creatures. Is something like this actually possible? Here we show that subjecting magnetic fluids suspended in an immiscible liquid to uniform, multidimensional, time-dependent magnetic fields, generates a variety of life-like collective dynamics, including various forms of locomotion, swarming and feeding, that are sustained by the continuous injection of energy via the applied field. These leaderless emergent behaviors occur autonomously, without human guidance, and are quite surprising. Such self-healing, remotely-powered fluid automatons could be used as an extraction/separation technology to efficiently purify water by scavenging toxic chemicals and microorganisms, or alternatively enable the controlled release of chemicals. Other possible applications include vigorous fluid mixing and even microdroplet manipulation for microfluidic bioassays. JF - Soft matter AU - Solis, Kyle J AU - Martin, James E AD - Sandia National Laboratories, Albuquerque, New Mexico 87185, USA. jmartin@sandia.gov. Y1 - 2014/12/07/ PY - 2014 DA - 2014 Dec 07 SP - 9136 EP - 9142 VL - 10 IS - 45 KW - Colloids KW - 0 KW - Fluorocarbons KW - Iron Compounds KW - fluorocarbon 77 KW - Water KW - 059QF0KO0R KW - iron pentacarbonyl KW - 6WQ62TAQ6Z KW - 2-Propanol KW - ND2M416302 KW - Index Medicus KW - Fluorocarbons -- chemistry KW - Iron Compounds -- chemistry KW - 2-Propanol -- chemistry KW - Water -- chemistry KW - Magnetic Fields UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1619318844?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Soft+matter&rft.atitle=Complex+magnetic+fields+breathe+life+into+fluids.&rft.au=Solis%2C+Kyle+J%3BMartin%2C+James+E&rft.aulast=Solis&rft.aufirst=Kyle&rft.date=2014-12-07&rft.volume=10&rft.issue=45&rft.spage=9136&rft.isbn=&rft.btitle=&rft.title=Soft+matter&rft.issn=1744-6848&rft_id=info:doi/10.1039%2Fc4sm01458h LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-06-29 N1 - Date created - 2014-10-31 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1039/c4sm01458h ER - TY - JOUR T1 - Applications of fractured continuum model to enhanced geothermal system heat extraction problems AN - 1868331386; PQ0004058592 AB - This paper describes the applications of the fractured continuum model to the different enhanced geothermal systems reservoir conditions. The capability of the fractured continuum model to generate fracture characteristics expected in enhanced geothermal systems reservoir environments are demonstrated for single and multiple sets of fractures. Fracture characteristics are defined by fracture strike, dip, spacing, and aperture. The paper demonstrates how the fractured continuum model can be extended to represent continuous fractured features, such as long fractures, and the conditions in which the fracture density varies within the different depth intervals. Simulations of heat transport using different fracture settings were compared with regard to their heat extraction effectiveness. The best heat extraction was obtained in the case when fractures were horizontal. A conventional heat extraction scheme with vertical wells was compared to an alternative scheme with horizontal wells. The heat extraction with the horizontal wells was significantly better than with the vertical wells when the injector was at the bottom. JF - SpringerPlus AU - Kalinina, Elena A AU - Klise, Katherine A AU - McKenna, Sean A AU - Hadgu, Teklu AU - Lowry, Thomas S AD - grid.419474.b, 0000000096883311, Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM, 87185, USA, eakalin@sandia.gov Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 1 EP - 13 PB - Springer Science & Business Media, Cham VL - 3 IS - 1 KW - Biotechnology and Bioengineering Abstracts KW - Heat KW - Fractures KW - Models KW - W 30910:Imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1868331386?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=SpringerPlus&rft.atitle=Applications+of+fractured+continuum+model+to+enhanced+geothermal+system+heat+extraction+problems&rft.au=Kalinina%2C+Elena+A%3BKlise%2C+Katherine+A%3BMcKenna%2C+Sean+A%3BHadgu%2C+Teklu%3BLowry%2C+Thomas+S&rft.aulast=Kalinina&rft.aufirst=Elena&rft.date=2014-12-01&rft.volume=3&rft.issue=1&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=SpringerPlus&rft.issn=2193-1801&rft_id=info:doi/10.1186%2F2193-1801-3-110 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-02-01 N1 - Number of references - 12 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Heat; Fractures; Models DO - http://dx.doi.org/10.1186/2193-1801-3-110 ER - TY - JOUR T1 - Towards temporal monitoring using coda correlations of icequakes on Erebus volcano, Antarctica AN - 1765880015; 2016-014066 AB - Recent theoretical advances pertaining to the properties of multiply scattered wavefields have yielded a plethora of numerical and controlled source studies aiming to better understand what information may be derived from these otherwise chaotic signals. Where temporal monitoring is concerned, recent advances in data mining have allowed the recovery of remarkably time-coherent correlation functions from ambient noise, and have furthermore permitted the direct mapping of velocity changes due to large earthquakes. Though not directly representative of the Green's function between stations, these time-coherent correlation functions have even been used to predict eruptive sequences on the Piton de la Fournaise volcano by detecting injection events. However, the exact nature of the correlation function in this case, particularly its coda, is unclear. Here, we seek to expand the concept of temporal monitoring to a more deterministic case, where we do in fact have a practical understanding of the correlation functions. In this study, we use a large network of short period and broadband instruments on Erebus volcano, Antarctica, to reconstruct inter-station correlation functions that converge towards a high degree of symmetry. We subsequently use a Markov Chain Monte Carlo algorithm to iteratively resample the time windows on which are built the correlation functions for maximum symmetry and coherence in time. These resampled correlation functions are then scanned for changes in decoherence, and these changes are then mapped in time and space to the volcanic edifice. We compare these changes to other evidence of temporal variation on Erebus volcano. JF - American Geophysical Union Fall Meeting AU - Chaput, J A AU - Campillo, Michel AU - Roux, Philippe AU - Knox, Hunter A AU - Aster, Rick C AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract S11E EP - 4380 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765880015?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Towards+temporal+monitoring+using+coda+correlations+of+icequakes+on+Erebus+volcano%2C+Antarctica&rft.au=Chaput%2C+J+A%3BCampillo%2C+Michel%3BRoux%2C+Philippe%3BKnox%2C+Hunter+A%3BAster%2C+Rick+C%3BAnonymous&rft.aulast=Chaput&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Proppant effects on maintaining fracture permeability in shale AN - 1765877690; 2016-011864 AB - A series of tests have been performed on manually fractured and propped shale. The shale used in this study contained 5-10% porosity, and 10-40% clay. Samples were fractured subparallel to bedding. Quartz sand (0.60-0.85 mm) was used as a proppant; proppant was manually placed on a fracture surface, resulting in a monolayer with random distribution. The specimens were repeatedly subjected to reservoir conditions, 20.7 MPa confining, 6.9 MPa differential stress, and temperature of 75 C. System permeability was measured during testing by flowing DI water through the specimen, flow rates were set to 0.002 ml/min, with the downstream vented to atmosphere. Upstream pressure varied to maintain the flow rate, and was approximately 1.4 MPa in the most recent (lowest permeability) test. Between test periods, specimens were removed from the test system and scanned with x-ray mu CT. There is significant decrease in flow with subsequent testing due fracture closure. This is attributed to observations of clay swelling, proppant embedment, proppant fracture and shale wall sloughing. These lead to a decrease in effective fracture aperture. Flow induced particle transport clogs flow paths and impedes flow. Isolated grains tend to crush whereas continuous grains in proppant patches tend fracture with little displacement and tend towards embedment. Corresponding numerical simulations are underway to capture the change in crack flow due to these mechanisms. Images from the CT scans of the proppant filled crack are segmented and meshed. Then flow simulations are performed via the finite element method. Preliminary results are discussed. This work is a precursor to laboratory-scale shale fracture and proppant testing; cores will be hydraulically fractured and propped with appropriate proppant and fluid rheology. Proppant life and permeability reduction will be monitored and specimens will be scanned with mu CT. Tests will be used to inform proppant flow models which seek to model proppant density and distribution within a fracture. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Ingraham, M D AU - Bauer, S J AU - Bolintineanu, D AU - Rao, R R AU - Lechman, J B AU - Romero, J A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H51Q EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765877690?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Proppant+effects+on+maintaining+fracture+permeability+in+shale&rft.au=Ingraham%2C+M+D%3BBauer%2C+S+J%3BBolintineanu%2C+D%3BRao%2C+R+R%3BLechman%2C+J+B%3BRomero%2C+J+A%3BAnonymous&rft.aulast=Ingraham&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Compaction and permeability reduction of Castlegate Sandstone under pore pressure cycling AN - 1765876587; 2016-012019 AB - We investigate time-dependent compaction and permeability changes by cycling pore pressure with application to compressed air energy storage (CAES) in a reservoir. Preliminary experiments capture the impacts of hydrostatic stress, pore water pressure, pore pressure cycling, chemical, and time-dependent considerations near a borehole in a CAES reservoir analog. CAES involves creating an air bubble in a reservoir. The high pressure bubble serves as a mechanical battery to store potential energy. When there is excess grid energy, bubble pressure is increased by air compression, and when there is energy needed on the grid, stored air pressure is released through turbines to generate electricity. The analog conditions considered are depth approximately 1 km, overburden stress approximately 20 MPa and a pore pressure approximately 10 MPa. Pore pressure is cycled daily or more frequently between approximately 10 MPa and 6 MPa, consistent with operations of a CAES facility at this depth and may continue for operational lifetime (25 years). The rock can vary from initially fully-to-partially saturated. Pore pressure cycling changes the effective stress. Jacketed, room temperature tap water-saturated samples of Castlegate Sandstone are hydrostatically confined (20 MPa) and subjected to a pore pressure resulting in an effective pressure of approximately 10 MPa. Pore pressure is cycled between 6 to 10 MPa. Sample displacement measurements yielded determinations of volumetric strain and from water flow measurements permeability was determined. Experiments ran for two to four weeks, with 2 to 3 pore pressure cycles per day. The Castlegate is a fluvial high porosity (>20%) primarily quartz sandstone, loosely calcite cemented, containing a small amount of clay. Pore pressure cycling induces compaction ( approximately 1%) and permeability decreases ( approximately 20%). The results imply that time-dependent compactive processes are operative. The load path, of increasing and decreasing pore pressure, may facilitate local loosening and grain readjustments that results in the compaction and permeability decreases observed. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Dept. of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.SAND2014-16586A JF - American Geophysical Union Fall Meeting AU - Bauer, S J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR41C EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765876587?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Compaction+and+permeability+reduction+of+Castlegate+Sandstone+under+pore+pressure+cycling&rft.au=Bauer%2C+S+J%3BAnonymous&rft.aulast=Bauer&rft.aufirst=S&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Multiporosity flow of gases in tight shale formations AN - 1765873276; 2016-011761 AB - Flow and transport in low-permeability fractured systems is important in both groundwater applications and low-permeability hydrocarbon systems. We have adapted the multirate solute transport model to the flow of single-phase natural tracers in low-permeability hydrocarbon source rocks, termed the multiporosity model. We illustrate the ability of the multiporosity model to generalize double-porosity models, of both the pseudo-steady (e.g., Warren and Root) and transient (Kazemi) interporosity flow types. We use the model to explore both production (pressure and flowrate) and compositional data obtained from tight gas shale formations using a Bayesian uncertainty quantification approach.Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Kuhlman, K L AU - Heath, J E AU - Gardner, P AU - Robinson, D G AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H51B EP - 0610 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765873276?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Multiporosity+flow+of+gases+in+tight+shale+formations&rft.au=Kuhlman%2C+K+L%3BHeath%2C+J+E%3BGardner%2C+P%3BRobinson%2C+D+G%3BAnonymous&rft.aulast=Kuhlman&rft.aufirst=K&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Experimental determination of P-V-T-X properties and adsorption kinetics in the CO (sub 2) -CH (sub 4) system under shale gas reservoir conditions AN - 1765871679; 2016-012319 AB - Shale gas production via hydrofracturing has profoundly changed the energy portfolio in the USA and other parts of the world. Under the shale gas reservoir conditions, CO (sub 2) and H (sub 2) O, either in residence or being injected during hydrofracturing or both, co-exist with CH (sub 4) . One important feature characteristic of shale is the presence of nanometer-scale (1-100 nm) pores in shale or mudstone. The interactions among CH (sub 4) , CO (sub 2) and H (sub 2) O in those nano-sized pores directly impact shale gas storage and gas release from the shale matrix. Therefore, a fundamental understanding of interactions among CH (sub 4) , CO (sub 2) and H (sub 2) O in nanopore confinement would provide guidance in addressing a number of problems such as rapid decline in production after a few years and low recovery rates. We are systematically investigating the P-V-T-X properties and adsorption kinetics in the CH (sub 4) -CO (sub 2) -H (sub 2) O system under the reservoir conditions. We have designed and constructed a unique high temperature and pressure experimental system that can measure both of the P-V-T-X properties and adsorption kinetics sequentially. We measure the P-V-T-X properties of CH (sub 4) -CO (sub 2) mixtures with CH (sub 4) up to 95 vol. %, and adsorption kinetics of various materials, under the conditions relevant to shale gas reservoir. We use three types of materials: (I) model materials, (II) single solid phases separated from shale samples, and (III) crushed shale samples from both the known shale gas producing formations and the shale gas barren formations. The model materials are well characterized in terms of pore sizes. Therefore, the results associated with the model material serve as benchmarks for our model development. Sandia National Laboratories is a multi-program laboratory operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. This research is supported by a Geoscience Foundation LDRD. JF - American Geophysical Union Fall Meeting AU - Xiong, Yongliang AU - Wang, Y AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract V51D EP - 4813 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765871679?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Experimental+determination+of+P-V-T-X+properties+and+adsorption+kinetics+in+the+CO+%28sub+2%29+-CH+%28sub+4%29+system+under+shale+gas+reservoir+conditions&rft.au=Xiong%2C+Yongliang%3BWang%2C+Y%3BAnonymous&rft.aulast=Xiong&rft.aufirst=Yongliang&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Geomechanical response of jointed caprock during CO (sub 2) geological sequestration AN - 1761073996; 2016-008585 AB - Geological sequestration of CO (sub 2) refers to the injection of supercritical CO (sub 2) into deep reservoirs trapped beneath a low-permeability caprock formation. Maintaining caprock integrity during the injection process is the most important factor for a successful injection. In this work we evaluate the potential for jointed caprock during injection scenarios using coupled three-dimensional multiphase flow and geomechanics modeling. Evaluation of jointed/fractured caprock systems is of particular concern to CO (sub 2) sequestration because creation or reactivation of joints (mechanical damage) can lead to enhanced pathways for leakage. In this work, we use an equivalent continuum approach to account for the joints within the caprock. Joint's aperture and non-linear stiffness of the caprock will be updated dynamically based on the effective normal stress. Effective permeability field will be updated based on the joints' aperture creating an anisotropic permeability field throughout the caprock. This feature would add another coupling between the solid and fluid in addition to basic Terzaghi's effective stress concept. In this study, we evaluate the impact of the joint's orientation and geometry of caprock and reservoir layers on geomechanical response of the CO (sub 2) geological systems. This work is supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Newell, P AU - Martinez, M J AU - Bishop, J E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H53D EP - 0894 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1761073996?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Geomechanical+response+of+jointed+caprock+during+CO+%28sub+2%29+geological+sequestration&rft.au=Newell%2C+P%3BMartinez%2C+M+J%3BBishop%2C+J+E%3BAnonymous&rft.aulast=Newell&rft.aufirst=P&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Noble gas tracing of fluid transport in shale reservoirs AN - 1761073762; 2016-008912 AB - We investigate fluid transport mechanisms in a shale reservoir using natural noble gas tracers. Noble gas tracing is promising due to sensitivity of transport to: pore structure and sizes; phase partitioning between groundwater and liquid and gaseous hydrocarbons; and deformation from hydraulic fracturing and creation of surface area. A time-series of over thirty wellhead fluid samples were collected from two hydraulically-fractured wells with different oil-to-gas ratios, along with production data (i.e., flowrate and pressure). Tracer and production data sets can be combined to infer production flow regimes, to estimate reservoir transport parameters, and to improve forecasts of production decline. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Heath, J E AU - Gardner, W P AU - Kuhlman, K L AU - Robinson, D G AU - Bauer, S J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract V51D EP - 4803 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1761073762?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Noble+gas+tracing+of+fluid+transport+in+shale+reservoirs&rft.au=Heath%2C+J+E%3BGardner%2C+W+P%3BKuhlman%2C+K+L%3BRobinson%2C+D+G%3BBauer%2C+S+J%3BAnonymous&rft.aulast=Heath&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Post-chelyabinsk risk assessment for near Earth objects (NEOs) AN - 1761073116; 2016-008724 AB - The widely-accepted NEO risk assessments published in the 1990s concluded that the largest asteroids (>1 km) dominated the hazard. Even though large NEOs represent only a tiny fraction of the population because of a power-law size distribution, the potential for global catastrophe means that the contribution from these low-probability, high-consequence events is large. This conclusion led to the Spaceguard survey, which has now catalogued about 90% of these objects, none of which is on a collision course. The survey has reduced the assessed risk from this size range by more than an order of magnitude because completion is highest for the largest and most dangerous. The relative risk from objects tens of meters in diameter is therefore increasing.The absolute assessed risk from airbursts caused by objects of this size is also higher for two reasons. First, they may be more frequent than previously thought because of an underestimated population. Second, they are significantly more damaging than assumed in the original assessment because (in most cases) they more efficiently couple energy to the surface than nuclear explosions. Last year's half-megaton airburst over Chelyabinsk, Russia, appears to challenge the notion that such events are extremely rare-especially when also considering the 1908 Tunguska event along with decades of infrasound bolide data showing higher-than-expected numbers of large airbursts. We will present a new analysis of the risk based on updated estimates for the population of undiscovered NEOs, taking into account the enhanced damage potential of collisional airbursts. Merging the survey population estimates with the bolide frequency estimates suggests a population of tens-of-meters sized bodies that may be a factor of three or so greater than estimated from surveys alone. Uncertainty in the population of airburst-class NEOs remains quite large, and can only be unambiguously reduced by expanded surveys focused on objects in the tens-of-meters size range. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under Contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Boslough, M AU - Harris, A W AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NH53B EP - 3895 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1761073116?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Post-chelyabinsk+risk+assessment+for+near+Earth+objects+%28NEOs%29&rft.au=Boslough%2C+M%3BHarris%2C+A+W%3BAnonymous&rft.aulast=Boslough&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Cohesive model applied to fracture propagation in Indiana Limestone AN - 1761073068; 2016-008564 AB - We apply a cohesive fracture (CF) model to results of short-rod (SR), notched 3-point-bend (N3PB) tests, and Brazil tests in Indiana Limestone. Calibration and validation of the model are performed within a commercial finite element modeling platform. By using a linear traction-displacement softening response for a defined fracture-opening displacement (w (sub 1) ) following peak tensile stress (sigma (sub crit) ), the CF model numerically lumps different spatially distributed inelastic processes occurring at and around fracture tips into a thin zone within an elastic domain. Both the SR and the N3PB test specimen geometries use a notch partway through the sample to control the location of fracture propagation. We develop a mesh for both the SR and N3PB geometries with a narrow cohesive zone in the center of notches. From the Brazil tests, we find a tensile splitting stress (sigma (sub split) ) of 5.9 MPa. We use a sigma (sub split) as the peak tensile stress (sigma (sub crit) ) for all simulations. The Young's modulus (E) and the critical crack opening distance (w (sub 1) ) of the CF model are calibrated against the SR data. The model successfully captures the elastic, yield, peak, and initial and late failure behavior and compares favorably against the N3PB tests. Differences in force-displacement and crack propagation are primarily caused by: more mixed-mode (shear and opening) crack propagation in N3PB than in SR tests, causing a higher peak; and transition from compression (high E) to tension (low E) in a larger volume of the N3PB sample than in the SR geometry. This material is based upon work supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Dewers, T A AU - Rinehart, A J AU - Bishop, J E AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H53C EP - 0873 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1761073068?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Cohesive+model+applied+to+fracture+propagation+in+Indiana+Limestone&rft.au=Dewers%2C+T+A%3BRinehart%2C+A+J%3BBishop%2C+J+E%3BAnonymous&rft.aulast=Dewers&rft.aufirst=T&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Coupled hydrogeophysical inversion for characterizing heterogeneous permeability field at a groundwater-river water interaction zone AN - 1761072968; 2016-008606 AB - The hydrological and biogeochemical processes at the groundwater and river water interface are largely controlled by the exchange dynamics between the two water bodies. Accurate characterization of the heterogeneous permeability field at such interface is critical for modeling the bulk flow as well as the biogeochemical processes that are coupled with the flow. Taking advantage of the distinct conductivities in groundwater and rive water, time lapse electrical resistivity tomography (ERT) can provide rich spatial and temporal data for characterizing the permeability field, by imaging the change in subsurface electric conductivity driven by river water intrusion and retreat. We installed a large-scale (300 m by 300 m) 3-dimensional ERT array to monitor river water intrusion and retreat through time at a major river corridor, and the 4-dimensional electrical geophysical data is assimilated to invert for the underlying permeability field using ensemble-based algorithms (e.g., ensemble Kalman filter and ensemble smoother). We developed a new high-performance hydrogeophysical code by coupling an ERT imaging code E4D (Johnson et al., 2010) with a site-scale flow and transport code, PFLOTRAN (Hammond et al., 2012). The coupled code provides the key modeling capability of multi-physics processes, parallel efficiency, and multi-realization simulation capability for hydrogeophysical inversion. We assimilated both well-based point measurements of water table and specific conductance and spatially continuous ERT images in a sequential Bayesian way. Our study demonstrates the effectiveness of joint hydrogeophysical inversion for large-scale characterization of subsurface properties in the groundwater and river water interaction zone. Our investigation of spatial versus temporal data assimilation strategies have inspired systematic data worth analyses to identify the most valuable data sets for hydrogeophysical inversion. The high performance computing is performed on the Hopper supercomputer at NERSC. The main scientific achievements of this study are to integrate multiscale and multi-type data with increasingly complex multi-physics model through Bayesian data assimilation techniques, and to handle the intensive computational demands by using high performance computing resources. JF - American Geophysical Union Fall Meeting AU - Chen, X AU - Johnson, T C AU - Hammond, G E AU - Zachara, J M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H54B EP - 02 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1761072968?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Coupled+hydrogeophysical+inversion+for+characterizing+heterogeneous+permeability+field+at+a+groundwater-river+water+interaction+zone&rft.au=Chen%2C+X%3BJohnson%2C+T+C%3BHammond%2C+G+E%3BZachara%2C+J+M%3BAnonymous&rft.aulast=Chen&rft.aufirst=X&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Resolution in electromagnetic prospecting AN - 1752579340; 2016-003162 AB - Low-frequency electromagnetic (EM) signals are commonly used in geophysical exploration of the shallow subsurface. Sensitivity to conductivity implies they are particularly useful for inferring fluid content of porous media. However, low-frequency EM wavefields are diffusive, and have significantly larger wavelengths compared to seismic signals of equal frequency. The wavelength of a 30 Hz sinusoid propagating with seismic velocity 3000 m/s is 100 m, whereas an analogous EM signal diffusing through a conductive body of 0.1 S/m (clayey shale) has wavelength 1825 m. The larger wavelength has implications for resolution of the EM prospecting method. We are investigating resolving power of the EM method via theoretical and numerical experiments. Normal incidence plane wave reflection/transmission by a thin geologic bed is amenable to analytic solution. Responses are calculated for beds that are conductive or resistive relative to the host rock. Preliminary results indicate the classic seismic resolution/detection limit of bed thickness approximately 1/8 wavelength is not achieved. EM responses for point or line current sources recorded by general acquisition geometries are calculated with a 3D finite-difference algorithm. These exhibit greater variability which may allow inference of bed thickness. We also examine composite responses of two point scatterers with separation when illuminated by an incident EM field. This is analogous to the Rayleigh resolution problem of estimating angular separation between two light sources. The First Born Approximation implies that perturbations in permittivity, permeability, and conductivity have different scattering patterns, which may be indicators of EM medium properties. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the US Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Aldridge, D F AU - Bartel, Lewis C AU - Knox, Hunter A AU - Schramm, K A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract NS43A EP - 3848 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 26A:Economic geology, general, deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752579340?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Resolution+in+electromagnetic+prospecting&rft.au=Aldridge%2C+D+F%3BBartel%2C+Lewis+C%3BKnox%2C+Hunter+A%3BSchramm%2C+K+A%3BAnonymous&rft.aulast=Aldridge&rft.aufirst=D&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Role of the capillary transition zone on the dissolution of CO (sub 2) into brine in saline reservoirs AN - 1752576958; 2016-001370 AB - Geologic carbon storage in deep saline reservoirs is a promising technology for reducing anthropogenic emissions into the atmosphere. Dissolution of injected CO2 into resident brines is one of the primary trapping mechanisms generally considered necessary to provide long-term storage security. Given that diffusion of CO2 in brine is woefully slow, convective dissolution, driven by a small increase in brine density with CO2 saturation, is considered to be the primary mechanism of dissolution trapping. Previous studies of convective dissolution have typically only considered the convective process in the single phase region below the gas-water contact (GWC) and have ignored the over-lying two-phase region where dissolution actually takes place. Our objective is to improve estimates of the long-term dissolution rate of CO2 into brine by including the two-phase region above the gas-water contact in model simulations. In the two-phase model, there is a capillary transition zone above the GWC over which the brine saturation decreases with increasing elevation. Our simulations show that when the capillary fringe height is small, which corresponds to very low entry pressure, assuming CO2-saturated brine in the two-phase region is well-motivated, as has been assumed in analyses of dissolution without the capillary transition. For typical finite entry pressures, the fringe thickness is finite and upwelling convection currents of fresh, un-carbonated brine must extend above the GWC to saturate the brine with CO2. Our results show the long-term dissolution rate can be enhanced by greater than 3 times the dissolution rates derived from ignoring the capillary transition zone. The single-phase, closed-top dissolution rate is recovered in the limit of vanishing entry pressure. This material is based upon work supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Martinez, M J AU - Hesse, M A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H24A EP - 03 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1752576958?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Role+of+the+capillary+transition+zone+on+the+dissolution+of+CO+%28sub+2%29+into+brine+in+saline+reservoirs&rft.au=Martinez%2C+M+J%3BHesse%2C+M+A%3BAnonymous&rft.aulast=Martinez&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Oedometric small angle neutron scattering; in-situ observation of deformation partitioning in clay-rich samples AN - 1739086798; 2015-114321 AB - We present novel oedometric small angle neutron scattering (SANS) on deforming clay-rich materials. Oedometric SANS involves a non-hydrostatic pressure vessel (i.e., the oedometer) that places a porous sample under uniaxial strain with control of applied pore pressure. The oedometer is optimized for neutron optics of SANS on the Low-Q Diffractometer of the Los Alamos Neutron Science Center. The device enables normal oedometric measurements of time-dependent compaction, but with SANS for in situ observation of pore structure evolution under uniaxial strain as a function of effective stress and pore fluid compositions. We present preliminary examination of clay compaction and testing of the device. Funding from the DOE Basic Energy Sciences Geosciences Program is gratefully acknowledged. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Bryan, C R AU - Heath, J E AU - Hjelm, R AU - Taylor, Mark AU - Olds, D AU - Dewers, T A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11H EP - 1013 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739086798?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Oedometric+small+angle+neutron+scattering%3B+in-situ+observation+of+deformation+partitioning+in+clay-rich+samples&rft.au=Bryan%2C+C+R%3BHeath%2C+J+E%3BHjelm%2C+R%3BTaylor%2C+Mark%3BOlds%2C+D%3BDewers%2C+T+A%3BAnonymous&rft.aulast=Bryan&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Long-term effect of fault-controlled CO (sub 2) alteration on the weakening and strengthening of reservoir and seal lithologies at Crystal Geyser, Green River, Utah AN - 1739085686; 2015-114333 AB - An understanding of the coupled chemical and mechanical properties and behavior of reservoir and seal rocks is critical for assessing both the short and long term security of sequestered CO (sub 2) . A combined structural diagenesis approach using observations from natural analogs has great advantages for understanding these properties over longer time scales than is possible using laboratory or numerical experiments. Current numerical models evaluating failure of reservoirs and seals during and after CO (sub 2) injection in the subsurface are just beginning to account for such coupled processes. Well-characterized field studies of natural analogs such as Crystal Geyser, Utah, are essential for providing realistic input parameters, calibration, and testing of numerical models across a range of spatial and temporal scales. Fracture mechanics testing was performed on a suite of naturally altered and unaltered reservoir and seal rocks exposed at the Crystal Geyser field site. These samples represent end-products of CO (sub 2) -related alteration over geologic (>103 yr) time scales. Both the double torsion and short rod test methods yield comparable results on the same samples. Tests demonstrate that CO (sub 2) -related alteration has weakened one reservoir sandstone lithology by approximately 50%, but the subcritical index is not significantly affected. An altered siltstone sample also shows a reduction in fracture toughness values and lowered subcritical index in comparison to unaltered siltstone. In contrast, elevated calcite content in shales due to CO (sub 2) alteration has increased fracture toughness. Similarly, fracture toughness was increased in what is otherwise a weak, poorly cemented sandstone unit due to increased calcite cement. Combined, these results demonstrate that CO (sub 2) -related alteration generally weakens rock to fracturing (i.e. lowers fracture toughness), except in cases where calcite cementation is significantly increased. The natural system at Crystal Geyser demonstrates that water-CO (sub 2) -rock interaction driven by changes in the geochemical environment have measurably altered rock geomechanical properties and that some rock units may become more prone to failure, ultimately leading to fracturing and leakage of subsurface reservoirs. These results also have application for CO (sub 2) -based enhanced oil recovery. JF - American Geophysical Union Fall Meeting AU - Major, J R AU - Eichhubl, Peter AU - Dewers, T A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H11K EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739085686?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Long-term+effect+of+fault-controlled+CO+%28sub+2%29+alteration+on+the+weakening+and+strengthening+of+reservoir+and+seal+lithologies+at+Crystal+Geyser%2C+Green+River%2C+Utah&rft.au=Major%2C+J+R%3BEichhubl%2C+Peter%3BDewers%2C+T+A%3BAnonymous&rft.aulast=Major&rft.aufirst=J&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Development of modern performance assessment tools and capabilities for underground disposal of transuranic waste at WIPP AN - 1739082752; 2015-117058 AB - The Waste Isolation Pilot Plant (WIPP) has been developed by the U.S. Department of Energy (DOE) for the geologic (deep underground) disposal of transuranic (TRU) waste. Containment of TRU waste at the WIPP is regulated by the U.S. Environmental Protection Agency (EPA). The DOE demonstrates compliance with the containment requirements by means of performance assessment (PA) calculations. WIPP PA calculations estimate the probability and consequence of potential radionuclide releases from the repository to the accessible environment for a regulatory period of 10,000 years after facility closure. The long-term performance of the repository is assessed using a suite of sophisticated computational codes. In a broad modernization effort, the DOE has overseen the transfer of these codes to modern hardware and software platforms. Additionally, there is a current effort to establish new performance assessment capabilities through the further development of the PFLOTRAN software, a state-of-the-art massively parallel subsurface flow and reactive transport code. Improvements to the current computational environment will result in greater detail in the final models due to the parallelization afforded by the modern code. Parallelization will allow for relatively faster calculations, as well as a move from a two-dimensional calculation grid to a three-dimensional grid. The result of the modernization effort will be a state-of-the-art subsurface flow and transport capability that will serve WIPP PA into the future. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. This research is funded by WIPP programs administered by the Office of Environmental Management (EM) of the U.S Department of Energy. JF - American Geophysical Union Fall Meeting AU - Zeitler, T AU - Kirchner, T B AU - Hammond, G E AU - Park, H AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract H21B EP - 0726 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739082752?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Development+of+modern+performance+assessment+tools+and+capabilities+for+underground+disposal+of+transuranic+waste+at+WIPP&rft.au=Zeitler%2C+T%3BKirchner%2C+T+B%3BHammond%2C+G+E%3BPark%2C+H%3BAnonymous&rft.aulast=Zeitler&rft.aufirst=T&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - 3D printing and digital rock physics for the geosciences AN - 1729848769; 2015-106151 AB - Imaging techniques for the analysis of porous structures have revolutionized our ability to quantitatively characterize geomaterials. For example, digital representations of rock from CT images and physics modeling based on these pore structures provide the opportunity to further advance our quantitative understanding of fluid flow, geomechanics, and geochemistry, and the emergence of coupled behaviors. Additive manufacturing, commonly known as 3D printing, has revolutionized production of custom parts, to the point where parts might be cheaper to print than to make by traditional means in a plant and ship. Some key benefits of additive manufacturing include short lead times, complex shapes, parts on demand, zero required inventory and less material waste. Even subtractive processing, such as milling and etching, may be economized by additive manufacturing. For the geosciences, recent advances in 3D printing technology may be co-opted to print reproducible porous structures derived from CT-imaging of actual rocks for experimental testing. The use of 3D printed microstructure allows us to surmount typical problems associated with sample-to-sample heterogeneity that plague rock physics testing and to test material response independent from pore-structure variability. Together, imaging, digital rocks and 3D printing potentially enables a new workflow for understanding coupled geophysical processes in a real, but well-defined setting circumventing typical issues associated with reproducibility, enabling full characterization and thus connection of physical phenomena to structure. In this talk we will discuss the possibilities that the marriage of these technologies can bring to geosciences, including examples from our current research initiatives in developing constitutive laws for transport and geomechanics via digital rock physics. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Martinez, M J AU - Yoon, H AU - Dewers, T A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR14A EP - 08 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729848769?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=3D+printing+and+digital+rock+physics+for+the+geosciences&rft.au=Martinez%2C+M+J%3BYoon%2C+H%3BDewers%2C+T+A%3BAnonymous&rft.aulast=Martinez&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Quantitative analysis of nano-pore geomaterials and representative sampling for digital rock physics AN - 1729847930; 2015-104154 AB - Geomaterials containing nano-pores (e.g., shales and carbonate rocks) have become increasingly important for emerging problems such as unconventional gas and oil resources, enhanced oil recovery, and geologic storage of CO2. Accurate prediction of coupled geophysical and chemical processes at the pore scale requires realistic representation of pore structure and topology. This is especially true for chalk materials, where pore networks are small and complex, and require characterization at sub-micron scale. In this work, we apply laser scanning confocal microscopy to characterize pore structures and microlithofacies at micron- and greater scales and dual focused ion beam-scanning electron microscopy (FIB-SEM) for 3D imaging of nanometer-to-micron scale microcracks and pore distributions. With imaging techniques advanced for nano-pore characterization, a problem of scale with FIB-SEM images is how to take nanometer scale information and apply it to the thin-section or larger scale. In this work, several texture characterization techniques including graph-based spectral segmentation, support vector machine, and principal component analysis are applied for segmentation clusters represented by 1-2 FIB-SEM samples per each cluster. Geometric and topological properties are analyzed and lattice-Boltzmann method (LBM) is used to obtain permeability at several different scales. Upscaling of permeability to the Darcy scale (e.g., the thin-section scale) with image dataset will be discussed with emphasis on understanding microfracture-matrix interaction, representative volume for FIB-SEM sampling, and multiphase flow and reactive transport. Funding from the DOE Basic Energy Sciences Geosciences Program is gratefully acknowledged. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Yoon, H AU - Dewers, T A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR11B EP - 4325 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729847930?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Quantitative+analysis+of+nano-pore+geomaterials+and+representative+sampling+for+digital+rock+physics&rft.au=Yoon%2C+H%3BDewers%2C+T+A%3BAnonymous&rft.aulast=Yoon&rft.aufirst=H&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Geomechanical variability within the D-E member of the lower Tuscaloosa Formation supporting the SECARB phase III CO2 injection program AN - 1729847501; 2015-106202 AB - We characterize the mechanical properties at near in-situ conditions of Lower Tuscaloosa lithologies at the Cranfield-site Southeast Regional Carbon Sequestration Partnership (SECARB) Phase III injection program. Four lithofacies in the injection horizon are chosen for strength testing, including: chlorite-cemented conglomeratic sandstone (CSS); mixed chlorite- and quartz-cemented cross-bedded fine sandstone (XSS); quartz-cemented tabular very fine sandstone (TSS); and quartz-cemented siltstone (SiS). Each lithofacies had 25-mm diameter by at least 50-mm length samples plugged. We performed a suite of compression tests for the sandstone at 100 degrees C and pore pressure of 30 MPa, including near-zero effective confining pressure triaxial test, axisymmetric compression tests, and hydrostatic compression test. Sandstones were saturated with supercritical CO2-equilibrated brine with 30 MPa pore pressure. SiS samples were equilibrated at a constant relative humidity of 77% at 100 degrees C. TSS had the largest yield and failure envelopes. XSS had slightly smaller yield and failure envelopes. CSS was by far the weakest. The sandy facies' effective unconfined tests showed rounded peaks, indicating viscous deformation during damage. SiS had strengths intermediate to TSS and XSS, and CSS. The chemical environment mechanically changed CSS, with cement type exerting control on strength. Constitutive behavior is modeled with elasto-plastic and viscous models. Essential features describing mechanical behavior include non-associative plasticity, stress-invariant dependent failure, elliptical cap surface, kinematic and isotropic hardening, non linear elasticity and elastic-plastic coupling. We discuss the influence of CO2 injection on geomechanical properties. This material is based upon work supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Rinehart, A J AU - Dewers, T A AU - Broome, S AU - Newell, P AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR23A EP - 4333 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729847501?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Geomechanical+variability+within+the+D-E+member+of+the+lower+Tuscaloosa+Formation+supporting+the+SECARB+phase+III+CO2+injection+program&rft.au=Rinehart%2C+A+J%3BDewers%2C+T+A%3BBroome%2C+S%3BNewell%2C+P%3BAnonymous&rft.aulast=Rinehart&rft.aufirst=A&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Development of constitutive parameters from true triaxial tests performed on Castlegate Sandstone AN - 1729847424; 2015-106204 AB - A series of true triaxial constant mean stress tests was performed on Castlegate Sandstone with the intent of determining the effect of the intermediate principal stress on localization. Tests were performed by first hydrostatically loading the specimens to the desired mean stress (30, 60, 90, 120, 150 MPa) then switching the test mode to maintain constant mean stress. This was done by releasing the minimum principal stress, increasing the maximum principal stress and varying the intermediate principal stress in proportion to achieve the desired stress state. The stress states were defined by maintaining a constant Lode angle throughout the test. Five Lode angles were tested ranging from axisymmetric compression to axisymmetric extension (30, 14.5, 0, -14.5, -30 degrees ). Results showed that as the Lode angle decreased the loads required to cause localization decreased and the band angle (defined as the angle between the band normal and the direction of maximum compression) decreased with increasing mean stress. Comparing the experimental results with localization predictions required development of constitutive parameters from the experimental data. This resulted in development of a strain separation process to determine elastic and plastic constitutive parameters from the experimental data. The strain was separated into four components: A) strain due to change in stress at constant modulus, B) strain due to stress dependence of the modulus, C) strain due to plastic strain dependence of the modulus, and D) plastic strain. Information derived from the strain separation process was used to develop constitutive parameters; which were applied to the Rudnicki and Rice (1975) localization criterion and the results were compared to experimental deformation bands. Results indicated that away from the axisymmetric stress states, at low mean stress, the strain separation process provides results which correlate well with experimental results. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Issen, K A AU - Ingraham, M D AU - Dewers, T A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR23A EP - 4335 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729847424?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Development+of+constitutive+parameters+from+true+triaxial+tests+performed+on+Castlegate+Sandstone&rft.au=Issen%2C+K+A%3BIngraham%2C+M+D%3BDewers%2C+T+A%3BAnonymous&rft.aulast=Issen&rft.aufirst=K&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Microstructural observations of reconsolidated granular salt to 250 degrees C AN - 1729847244; 2015-106200 AB - Very low permeability is a principal reason salt formations are considered viable hosts for disposal of nuclear waste and spent nuclear fuel. Granular salt is likely to be used as back-fill material and as a seal system component. Granular salt is expected to reconsolidate to a low permeability condition because of external pressure from the surrounding salt formation. Understanding the consolidation processes--known to depend on the stress state, moisture availability and temperature--is important for predicting achievement of sealing functions and long-term repository performance. As granular salt consolidates, initial void reduction is accomplished by brittle processes of grain rearrangement and cataclastic flow. At porosities of less than 10%, grain boundary processes and crystal-plastic mechanisms govern further porosity reduction. We investigate the micro-mechanisms operative in granular salt that has been consolidated under high temperatures to relatively low porosity. These conditions would occur proximal to heat-generating canisters. Mine-run salt from the Waste Isolation Pilot Plant was used to create cylindrical samples which were consolidated at 250 degrees C and stresses to 20 MPa. From samples consolidated to fractional densities of 86% and 97% polished thin sections, etched cleavage chips, and fragments were fabricated. Microstructural techniques included scanning electron and optical microscopy. Microstructure of undeformed mine-run salt was compared to the deformed granular salt. Observed deformation mechanisms include glide, cross slip, climb, fluid-assisted creep, pressure-solution redeposition, and annealing. Documentation of operative deformation mechanisms within the consolidating granular salt, particularly at grain boundaries, is essential to establish effects of moisture, stress, and temperature. Future work will include characterization of pore structures. Information gleaned in these studies supports evaluation of a constitutive model for reconsolidating granular salt, which will be used to predict the thermal-mechanical-hydrologic response of salt repository seal structures and backfilled rooms. JF - American Geophysical Union Fall Meeting AU - Mills, M M AU - Hansen, F AU - Bauer, S J AU - Stormont, J AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR23A EP - 4331 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729847244?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Microstructural+observations+of+reconsolidated+granular+salt+to+250+degrees+C&rft.au=Mills%2C+M+M%3BHansen%2C+F%3BBauer%2C+S+J%3BStormont%2C+J%3BAnonymous&rft.aulast=Mills&rft.aufirst=M&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - An experimental investigation into failure and localization phenomena in the extension to shear fracture transition in rock AN - 1729846291; 2015-106201 AB - Fluid-pressure assisted fracturing can produce mesh and other large, interconnected and complex networks consisting of both extension and shear fractures in various metamorphic, magmatic and tectonic systems. Presently, rock failure criteria for tensile and low-mean compressive stress conditions is poorly defined, although there is accumulating evidence that the transition from extension to shear fracture with increasing mean stress is continuous. We report on the results of experiments designed to document failure criteria, fracture mode, and localization phenomena for several rock types (sandstone, limestone, chalk and marble). Experiments were conducted in triaxial extension using a necked (dogbone) geometry to achieve mixed tension and compression stress states with local component-strain measurements in the failure region. The failure envelope for all rock types is similar, but are poorly described using Griffith or modified Griffith (Coulomb or other) failure criteria. Notably, the mode of fracture changes systematically from pure extension to shear with increase in compressive mean stress and display a continuous change in fracture orientation with respect to principal stress axes. Differential stress and inelastic strain show a systematic increase with increasing mean stress, whereas the axial stress decreases before increasing with increasing mean stress. The stress and strain data are used to analyze elastic and plastic strains leading to failure and compare the experimental results to predictions for localization using constitutive models incorporating on bifurcation theory. Although models are able to describe the stability behavior and onset of localization qualitatively, the models are unable to predict fracture type or orientation. Constitutive models using single or multiple yield surfaces are unable to predict the experimental results, reflecting the difficulty in capturing the changing micromechanisms from extension to shear failure. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Deopartment of Energy's National Security Administration under contract DE-AC04-94AL85000. SAND2014-16578A JF - American Geophysical Union Fall Meeting AU - Choens, R C, II AU - Chester, F M AU - Bauer, S J AU - Flint, G M AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR23A EP - 4332 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729846291?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=An+experimental+investigation+into+failure+and+localization+phenomena+in+the+extension+to+shear+fracture+transition+in+rock&rft.au=Choens%2C+R+C%2C+II%3BChester%2C+F+M%3BBauer%2C+S+J%3BFlint%2C+G+M%3BAnonymous&rft.aulast=Choens&rft.aufirst=R&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Development of a thermodynamically consistent constitutive framework for Castlegate Sandstone AN - 1729846137; 2015-106203 AB - Development of accurate field-scale deformation models requires use of a constitutive framework that is capable of representing material behavior, and can be calibrated using available mechanical response data. This study focuses on the formulation of such a constitutive framework for Castlegate sandstone, which is a high porosity fluvial-deposited reservoir analog rock. In developing a constitutive framework, researchers must balance the complexity of the mathematics required to represent all aspects of mechanical response, with the ease of implementation. Central to this effort is identifying and modeling the most fundamental material behaviors. For Castlegate sandstone, experimentalists (e.g., AGU Abstract 30068, Issen et al.) report three behaviors that are essential in characterizing deformation response: 1) dependence of the moduli on stress (nonlinearity), 2) evolution of the moduli with plastic strain, and 3) non-normality of the plastic strain increment to the yield surface (non-associativity). This work employs the principles of hyperplasticity (e.g., Houlsby and Puzrin, 2006) to develop a thermodynamically sound constitutive framework for Castlegate sandstone. This requires selection of two potentials: 1) a thermodynamic potential (i.e., internal energy, enthalpy, Helmholtz function, or Gibbs' function) and 2) a dissipation function or yield surface. Furthermore, the elastic, plastic, and coupled strain increments are derived from these potentials. This study uses a Gibbs' function to define expressions for the evolution of the elastic moduli, from which elastic and coupled strain increments are determined. The yield surface in dissipative stress-space is used to derive the plastic strain increments. A key result of this formulation is that normality is predicted in dissipative stress space; this result is evaluated against experimental data from work discussed in AGU Abstract 30068, Issen et al. JF - American Geophysical Union Fall Meeting AU - Richards, Melissa C AU - Ingraham, M D AU - Issen, K A AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract MR23A EP - 4334 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1729846137?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Development+of+a+thermodynamically+consistent+constitutive+framework+for+Castlegate+Sandstone&rft.au=Richards%2C+Melissa+C%3BIngraham%2C+M+D%3BIssen%2C+K+A%3BAnonymous&rft.aulast=Richards&rft.aufirst=Melissa&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-11-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Evaluating sediment stability at offshore marine hydrokinetic energy facilities AN - 1722154385; 2015-097841 AB - Development of offshore alternative energy production methods through the deployment of Marine Hydrokinetic (MHK) devices (e.g. wave, tidal, and wind generators) in the United States continues at a rapid pace, with significant public and private investment in recent years. The installation of offshore MHK systems includes cabling to the shoreline and some combination of bottom foundation (e.g., piles, gravity bases, suction buckets) or anchored floating structure. Installation of any of this infrastructure at the seabed may affect coastal sediment dynamics. It is, therefore, necessary to evaluate the interrelationships between hydrodynamics and seabed dynamics and the effects of MHK foundations and cables on sediment transport. If sufficient information is known about the physical processes and sediment characteristics of a region, hydrodynamic and sediment transport models may be developed to evaluate near and far-field sediment transport. The ultimate goal of these models and methods is to quantitatively evaluate changes to the baseline seabed stability due to the installation of MHK farms in the water. The objective of the present study is to evaluate and validate wave, current, and sediment transport models (i.e., a site analysis) that may be used to estimate risk of sediment mobilization and transport. While the methodology and examples have been presented in a draft guidance document (Roberts et al., 2013), the current report presents an overall strategy for model validation, specifically for a case study in the Santa Cruz Bight, Monterey Bay, CA. Innovative techniques to quantify the risk of sediment mobility has been developed to support these investigations. Public domain numerical models are utilized to estimate the near-shore wave climate (SWAN: Simulating Waves Near-shore) and circulation and sediment transport (EFDC: Environmental Fluid Dynamics Code) regimes. The models were validated with field hydrodynamic data. Sediment size information was provided by the USGS usSEABED sediment database program. Near-bottom current- and wave-induced shear stresses were computed and used directly to derive a sediment mobilization risk relationship. JF - American Geophysical Union Fall Meeting AU - Jones, C A AU - Magalen, J AU - Roberts, J AU - Chang, G AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract OS13A EP - 1307 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722154385?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Evaluating+sediment+stability+at+offshore+marine+hydrokinetic+energy+facilities&rft.au=Jones%2C+C+A%3BMagalen%2C+J%3BRoberts%2C+J%3BChang%2C+G%3BAnonymous&rft.aulast=Jones&rft.aufirst=C&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - An ice sheet model initialization procedure for smooth coupling with climate forcing AN - 1722154127; 2015-097716 AB - In order to perform transient simulations of ice sheet evolution, a spin up of several thousands of years is usually required to obtain an initial state for which the ice sheet model is close to thermo-mechanical equilibrium. Using this approach, however, the final ice sheet geometry will likely be significantly different from that of the present-day, which will strongly impact forward model simulations, in particular those targeting a short (50-100 years) period of time. To mitigate this problem, we propose an adjoint-based optimization algorithm for the ice sheet initialization, in which we minimize the mismatch with observed surface velocity data and between the surface mass balance forcing and the modeled flux divergence. We invert for basal topography and basal friction fields simultaneously, and use the first-order Stokes approximation. We provide results for the Greenland ice sheet and also compare our proposed approach to the more widely used approach of matching surface velocity data only, by inverting for basal friction parameters. Also, we compute the sensitivity of integral quantities like the total ice discharge flux with respect to spatial changes in the basal friction or the basal topography. Current and future work will focus on modeling uncertainties of the optimized basal sliding parameters using the inverse of the Hessian as an approximation for the covariance of the parameter distribution. JF - American Geophysical Union Fall Meeting AU - Perego, Mauro AU - Price, S F AU - Stadler, Georg AU - Kalashnikova, I AU - Salinger, A AU - Jakeman, J AU - Eldred, M AU - Jackson, Charles AU - Anonymous Y1 - 2014/12// PY - 2014 DA - December 2014 SP - Abstract C53D EP - 04 PB - American Geophysical Union, Washington, DC VL - 2014 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722154127?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=An+ice+sheet+model+initialization+procedure+for+smooth+coupling+with+climate+forcing&rft.au=Perego%2C+Mauro%3BPrice%2C+S+F%3BStadler%2C+Georg%3BKalashnikova%2C+I%3BSalinger%2C+A%3BJakeman%2C+J%3BEldred%2C+M%3BJackson%2C+Charles%3BAnonymous&rft.aulast=Perego&rft.aufirst=Mauro&rft.date=2014-12-01&rft.volume=2014&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2014 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-10-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - Joule-Thomson effects on the flow of liquid water AN - 1689589039; 2015-053891 AB - We present a revised form of the energy balance for the coupled thermodynamics of liquid water flowing in porous media and give examples of situations where a commonly used formulation based on transport of enthalpy leads to erroneous results. Assuming negligible contribution from kinetic energy as well as sources and sinks such as energy from radioactive decay, total energy conservation is reduced to a balance between changes in internal energy, enthalpy, conductive heat flux, and gravitational potential energy. The Joule-Thomson coefficient is defined as the change in temperature with respect to an increase in pressure at constant enthalpy. Because liquid water has a negative Joule-Thomson coefficient at low temperatures, at a constant gravitational potential water cools as it compresses and heats as it expands. If one ignores the gravitational energy, transport of enthalpy alone leads to water heating by 2 degrees C per kilometer as it is brought up from depth. The corrected energy balance transports methalpy, which is enthalpy plus gravitational potential energy. Although the simpler form leads to small changes in the temperature profile for typical simulations, there are several instances where this effect may prove to be important. The most important impact of the erroneous form is probably in the field of geothermal energy production, where the creation of a few degrees of heat in a simulation could lead to miscalculation of power plant efficiencies. Copyright 2014 Springer Science+Business Media Dordrecht JF - Transport in Porous Media AU - Stauffer, Philip H AU - Lewis, K C AU - Stein, Joshua S AU - Travis, Bryan J AU - Lichtner, Peter AU - Zyvoloski, George Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 471 EP - 485 PB - Springer, Dordrecht VL - 105 IS - 3 SN - 0169-3913, 0169-3913 KW - water KW - hydrology KW - heat flux KW - carbon sequestration KW - mantle KW - fluid flow KW - porous materials KW - Joule-Thomson effect KW - energy conservation KW - convection KW - energy balance KW - temperature KW - ground water KW - enthalpy KW - transport KW - geysers KW - hydrodynamics KW - heating KW - heat transfer KW - thermodynamic properties KW - ocean floors KW - mass transfer KW - kinetics KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689589039?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transport+in+Porous+Media&rft.atitle=Joule-Thomson+effects+on+the+flow+of+liquid+water&rft.au=Stauffer%2C+Philip+H%3BLewis%2C+K+C%3BStein%2C+Joshua+S%3BTravis%2C+Bryan+J%3BLichtner%2C+Peter%3BZyvoloski%2C+George&rft.aulast=Stauffer&rft.aufirst=Philip&rft.date=2014-12-01&rft.volume=105&rft.issue=3&rft.spage=471&rft.isbn=&rft.btitle=&rft.title=Transport+in+Porous+Media&rft.issn=01693913&rft_id=info:doi/10.1007%2Fs11242-014-0379-3 L2 - http://springerlink.metapress.com/(l4tqdq55jga2hgb0achos1qm)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:100342,1 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2015-01-01 N1 - Number of references - 38 N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2015-06-18 N1 - SubjectsTermNotLitGenreText - carbon sequestration; convection; energy balance; energy conservation; enthalpy; fluid flow; geysers; ground water; heat flux; heat transfer; heating; hydrodynamics; hydrology; Joule-Thomson effect; kinetics; mantle; mass transfer; ocean floors; porous materials; temperature; thermodynamic properties; transport; water DO - http://dx.doi.org/10.1007/s11242-014-0379-3 ER - TY - JOUR T1 - Multistation validation of waveform correlation techniques as applied to broad regional monitoring AN - 1641011379; 2015-002543 AB - Waveform correlation is garnering attention as a method for detecting, locating, and characterizing similar seismic events. To explore the opportunities for using waveform correlation in broad regional monitoring, we applied the technique to a large region of central Asia over a three-year period, monitoring for events at regional distances using three high-quality stations. We discuss methods for choosing quality templates and introduce a method for choosing correlation detection thresholds, tailored for each template, for a desired false alarm rate. Our SeisCorr software found more than 10,000 detections during the three-year period using almost 2000 templates. We discuss and evaluate three methods of confirming detections: bulletin confirmation, high correlation with a template, and multistation validation. At each station, 65%-75% of our detections could be confirmed, most by multistation validation. We confirmed over 6500 unique detections. For monitoring applications, it is of interest that a significant portion of the Comprehensive Nuclear-Test-Ban Treaty Organization's Late Event Bulletin (LEB) catalog events was detected and that adding our confirmed detections for the LEB catalog would more than double the catalog size. Waveform correlation also allows for relative magnitude calculation, and we explore the magnitudes of detected events. The results of our study suggest that doing broad regional monitoring using historical and real-time-generated templates is feasible and will increase detection capabilities. JF - Bulletin of the Seismological Society of America AU - Slinkard, Megan AU - Schaff, David AU - Mikhailova, Natalya AU - Heck, Stephen AU - Young, Christopher AU - Richards, Paul G Y1 - 2014/12// PY - 2014 DA - December 2014 SP - 2768 EP - 2781 PB - Seismological Society of America, Berkeley, CA VL - 104 IS - 6 SN - 0037-1106, 0037-1106 KW - technology KW - monitoring KW - guided waves KW - explosions KW - magnitude KW - Lg-waves KW - elastic waves KW - correlation KW - seismic sources KW - Central Asia KW - surface waves KW - Commonwealth of Independent States KW - seismicity KW - Kazakhstan KW - seismic waves KW - seismic networks KW - nuclear explosions KW - Asia KW - earthquakes KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011379?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Multistation+validation+of+waveform+correlation+techniques+as+applied+to+broad+regional+monitoring&rft.au=Slinkard%2C+Megan%3BSchaff%2C+David%3BMikhailova%2C+Natalya%3BHeck%2C+Stephen%3BYoung%2C+Christopher%3BRichards%2C+Paul+G&rft.aulast=Slinkard&rft.aufirst=Megan&rft.date=2014-12-01&rft.volume=104&rft.issue=6&rft.spage=2768&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120140140 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2015-01-01 N1 - Number of references - 27 N1 - PubXState - CA N1 - Document feature - illus. incl. 5 tables, geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-12-31 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - Asia; Central Asia; Commonwealth of Independent States; Comprehensive Test Ban Treaty; correlation; earthquakes; elastic waves; explosions; guided waves; Kazakhstan; Lg-waves; magnitude; monitoring; nuclear explosions; seismic networks; seismic sources; seismic waves; seismicity; surface waves; technology DO - http://dx.doi.org/10.1785/0120140140 ER - TY - CPAPER T1 - Simulations of Ionic Aggregate Morphology and Dynamics in Ionomer Melts T2 - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AN - 1627964638; 6311314 JF - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AU - Frischknecht, Amalie Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Morphology KW - Simulation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627964638?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.atitle=Simulations+of+Ionic+Aggregate+Morphology+and+Dynamics+in+Ionomer+Melts&rft.au=Frischknecht%2C+Amalie&rft.aulast=Frischknecht&rft.aufirst=Amalie&rft.date=2014-11-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2014/webprogram/meeting2014-11-16.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-31 N1 - Last updated - 2014-11-26 ER - TY - CPAPER T1 - Atomistic Simulations of Thermoresponsive Poly(N-isopropylacrylamide) Polymers T2 - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AN - 1627963903; 6309788 JF - 2014 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2014) AU - Abbott, Lauren AU - Stevens, Mark Y1 - 2014/11/16/ PY - 2014 DA - 2014 Nov 16 KW - Simulation KW - Polymers UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1627963903?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.atitle=Atomistic+Simulations+of+Thermoresponsive+Poly%28N-isopropylacrylamide%29+Polymers&rft.au=Abbott%2C+Lauren%3BStevens%2C+Mark&rft.aulast=Abbott&rft.aufirst=Lauren&rft.date=2014-11-16&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2014/webprogram/meeting2014-11-16.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-31 N1 - Last updated - 2014-11-26 ER - TY - CPAPER T1 - Constitutive Model Development to Address Anisotropic Inelasticity and Failure T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645173318; 6315199 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Ostien, Jake AU - Scherzinger, Bill AU - Lu, Wei-Yang Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Anisotropy KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645173318?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.atitle=Constitutive+Model+Development+to+Address+Anisotropic+Inelasticity+and+Failure&rft.au=Ostien%2C+Jake%3BScherzinger%2C+Bill%3BLu%2C+Wei-Yang&rft.aulast=Ostien&rft.aufirst=Jake&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2014/ViewAcceptedAbstracts.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - The Impact of Reference Frame Orientation on Discrete Ordinates Solutions in the Presence of Ray Effects and a Related Mitigation Technique T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645171504; 6314612 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Tencer, John Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Mitigation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645171504?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.atitle=The+Impact+of+Reference+Frame+Orientation+on+Discrete+Ordinates+Solutions+in+the+Presence+of+Ray+Effects+and+a+Related+Mitigation+Technique&rft.au=Tencer%2C+John&rft.aulast=Tencer&rft.aufirst=John&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2014/ViewAcceptedAbstracts.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Mechanical characterization of fiber reinforced polymer composite T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645171457; 6315000 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Jin, Helena AU - Lu, Wei-Yang Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Fibers KW - Composite materials KW - Polymers UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645171457?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.atitle=Mechanical+characterization+of+fiber+reinforced+polymer+composite&rft.au=Jin%2C+Helena%3BLu%2C+Wei-Yang&rft.aulast=Jin&rft.aufirst=Helena&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2014/ViewAcceptedAbstracts.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Nanomechanics of Helium-3 Bubble Growth in Aging Palladium Tritides T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645171454; 6314858 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Zimmerman, Jonathan AU - Hale, Lucas Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - palladium KW - Growth KW - Aging KW - Palladium UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645171454?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.atitle=Nanomechanics+of+Helium-3+Bubble+Growth+in+Aging+Palladium+Tritides&rft.au=Zimmerman%2C+Jonathan%3BHale%2C+Lucas&rft.aulast=Zimmerman&rft.aufirst=Jonathan&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2014/ViewAcceptedAbstracts.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Using Hyper Dual Numbers To Construct Parameterized Reduced Order Models T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645169528; 6313682 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Brake, Matthew AU - Fike, J AU - Topping, S Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645169528?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.atitle=Using+Hyper+Dual+Numbers+To+Construct+Parameterized+Reduced+Order+Models&rft.au=Brake%2C+Matthew%3BFike%2C+J%3BTopping%2C+S&rft.aulast=Brake&rft.aufirst=Matthew&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2014/ViewAcceptedAbstracts.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - The Effects of Manufacturing on the Dimensional Stability of Chemically Blown Polyurethane Foams T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645167042; 6315269 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Long, Kevin AU - Rao, Rekha AU - Mondy, Lisa Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - polyurethane KW - Foams UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645167042?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.atitle=The+Effects+of+Manufacturing+on+the+Dimensional+Stability+of+Chemically+Blown+Polyurethane+Foams&rft.au=Long%2C+Kevin%3BRao%2C+Rekha%3BMondy%2C+Lisa&rft.aulast=Long&rft.aufirst=Kevin&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2014/ViewAcceptedAbstracts.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Metallic Inclusions in Phononic Crystals for Thermoelectric Applications T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645167025; 6315527 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Reinke, Charles AU - Alaie, Seyedhamidrez AU - Su, Mehmet AU - Leseman, Zayd AU - El-Kady, Ihab Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Crystals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645167025?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.atitle=Metallic+Inclusions+in+Phononic+Crystals+for+Thermoelectric+Applications&rft.au=Reinke%2C+Charles%3BAlaie%2C+Seyedhamidrez%3BSu%2C+Mehmet%3BLeseman%2C+Zayd%3BEl-Kady%2C+Ihab&rft.aulast=Reinke&rft.aufirst=Charles&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2014/ViewAcceptedAbstracts.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Multiaxial Ductile Failure of Aluminum Alloys T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645166994; 6315357 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Lu, Wei-Yang AU - Jin, Helena Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Aluminum KW - Alloys KW - alloys UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645166994?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.atitle=Multiaxial+Ductile+Failure+of+Aluminum+Alloys&rft.au=Lu%2C+Wei-Yang%3BJin%2C+Helena&rft.aulast=Lu&rft.aufirst=Wei-Yang&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2014/ViewAcceptedAbstracts.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Local-Nonlocal Coupling for Modeling Fracture T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645166692; 6315383 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - Littlewood, David AU - Silling, Stewart AU - Seleson, Pablo Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Fractures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645166692?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.atitle=Local-Nonlocal+Coupling+for+Modeling+Fracture&rft.au=Littlewood%2C+David%3BSilling%2C+Stewart%3BSeleson%2C+Pablo&rft.aulast=Littlewood&rft.aufirst=David&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2014/ViewAcceptedAbstracts.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - CPAPER T1 - Experiments to Determine Salt Dissolution Rate as a Function of Brine Properties T2 - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AN - 1645158174; 6314301 JF - 2014 International Mechanical Engineering Congress & Exposition (ASME 2014) AU - O'Hern, Timothy AU - Lord, David AU - Rudeen, David Y1 - 2014/11/14/ PY - 2014 DA - 2014 Nov 14 KW - Salts KW - Dissolution KW - Brines UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645158174?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.atitle=Experiments+to+Determine+Salt+Dissolution+Rate+as+a+Function+of+Brine+Properties&rft.au=O%27Hern%2C+Timothy%3BLord%2C+David%3BRudeen%2C+David&rft.aulast=O%27Hern&rft.aufirst=Timothy&rft.date=2014-11-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2014/ViewAcceptedAbstracts.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-30 N1 - Last updated - 2015-01-14 ER - TY - JOUR T1 - Structural health and prognostics management for the enhancement of offshore wind turbine operations and maintenance strategies AN - 1635031901; 20809760 AB - Offshore wind turbines are an attractive source for clean and renewable energy for reasons including their proximity to population centers and higher capacity factors. One obstacle to the more widespread installation of offshore wind turbines in the USA, however, is that recent projections of offshore operations and maintenance costs vary from two to five times the land-based costs. One way in which these costs could be reduced is through use of a structural health and prognostics management (SHPM) system as part of a condition-based maintenance paradigm with smart loads management. This paper contributes to the development of such strategies by developing an initial roadmap for SHPM, with application to the blades. One of the key elements of the approach is a multiscale simulation approach developed to identify how the underlying physics of the system are affected by the presence of damage and how these changes manifest themselves in the operational response of a full turbine. A case study of a trailing edge disbond is analysed to demonstrate the multiscale sensitivity of damage approach and to show the potential life extension and increased energy capture that can be achieved using simple changes in the overall turbine control and loads management strategy. The integration of health monitoring information, economic considerations such as repair costs versus state of health, and a smart loads management methodology provides an initial roadmap for reducing operations and maintenance costs for offshore wind farms while increasing turbine availability and overall profit. Copyright copyright 2013 John Wiley & Sons, Ltd. JF - Wind Energy AU - Griffith, DTodd AU - Yoder, Nathanael C AU - Resor, Brian AU - White, Jonathan AU - Paquette, Joshua AD - Wind and Water Technologies, Sandia National Laboratories, Albuquerque, New Mexico, USA. Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 1737 EP - 1751 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 17 IS - 11 SN - 1095-4244, 1095-4244 KW - Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Health & Safety Science Abstracts; Sustainability Science Abstracts KW - Sensitivity KW - Resource management KW - Maintenance and repair KW - Environmental impact KW - Simulation KW - Maintenance KW - Turbines KW - USA KW - Wind power KW - Renewable resources KW - Case studies KW - Wind energy KW - Offshore operations KW - Renewable energy KW - Energy KW - Economics KW - Profits KW - Environment management KW - wind farm KW - Q2 09243:Structure, mechanics and thermodynamics KW - O 5080:Legal/Governmental KW - M3 1010:Issues in Sustainable Development KW - H 15000:Civil/Structural Engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1635031901?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wind+Energy&rft.atitle=Structural+health+and+prognostics+management+for+the+enhancement+of+offshore+wind+turbine+operations+and+maintenance+strategies&rft.au=Griffith%2C+DTodd%3BYoder%2C+Nathanael+C%3BResor%2C+Brian%3BWhite%2C+Jonathan%3BPaquette%2C+Joshua&rft.aulast=Griffith&rft.aufirst=DTodd&rft.date=2014-11-01&rft.volume=17&rft.issue=11&rft.spage=1737&rft.isbn=&rft.btitle=&rft.title=Wind+Energy&rft.issn=10954244&rft_id=info:doi/10.1002%2Fwe.1665 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Turbines; Renewable resources; Wind power; Resource management; Offshore operations; Maintenance and repair; Environmental impact; Environment management; wind farm; Sensitivity; Case studies; Wind energy; Energy; Renewable energy; Economics; Profits; Simulation; Maintenance; USA DO - http://dx.doi.org/10.1002/we.1665 ER - TY - JOUR T1 - Failure of cap-rock seals as determined from mechanical stratigraphy, stress history, and tensile-failure analysis of exhumed analogs AN - 1629939630; 2014-091712 AB - The sedimentologic and tectonic histories of clastic cap rocks and their inherent mechanical properties control the nature of permeable fractures within them. The migration of fluid through mm- to cm-scale fracture networks can result in focused fluid flow allowing hydrocarbon production from unconventional reservoirs or compromising the seal integrity of fluid traps. To understand the nature and distribution of subsurface fluid-flow pathways through fracture networks in cap-rock seals we examine four exhumed Paleozoic and Mesozoic seal analogs in Utah. We combine these outcrop analyses with subsidence analysis, paleoloading histories, and rock-strength testing data in modified Mohr-Coulomb-Griffith analyses to evaluate the effects of differential stress and rock type on fracture mode. Relative to the underlying sandstone reservoirs, all four seal types are low-permeability, heterolithic sequences that show mineralized hydraulic-extension fractures, extensional-shear fractures, and shear fractures. Burial-history models suggest that the cap-rock seal analogs reached a maximum burial depth >4 km (2.5 mi) and experienced a lithostatic load of up to 110 MPa (15,954 psi). Median tensile strength from indirect mechanical tests ranges from 2.3 MPa (334 psi) in siltstone to 11.5 MPa (1668 psi) in calcareous shale. Analysis of the pore-fluid factor (lambda (sub v) =P (sub f) /sigma (sub v) ) through time shows changes in the expected failure mode (extensional shear or hydraulic extension), and that failure mode depends on a combination of mechanical rock properties and differential stress. As expected with increasing lithostatic load, the amount of overpressure that is required to induce failure increases but is also lithology dependent. JF - AAPG Bulletin AU - Petrie, E S AU - Evans, J P AU - Bauer, S J Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 2365 EP - 2389 PB - American Association of Petroleum Geologists, Tulsa, OK VL - 98 IS - 11 SN - 0149-1423, 0149-1423 KW - United States KW - X-ray diffraction data KW - Cretaceous KW - petroleum KW - extension tectonics KW - laboratory studies KW - fractures KW - southeastern Utah KW - sedimentary rocks KW - dip KW - normal faults KW - siltstone KW - exhumation KW - outcrops KW - tectonics KW - faults KW - failures KW - experimental studies KW - Carmel Formation KW - mudstone KW - Upper Jurassic KW - Jurassic KW - strength KW - Paleozoic KW - Mancos Shale KW - loading KW - stress KW - mechanical properties KW - Mesozoic KW - models KW - Organ Rock Formation KW - dilatancy KW - Entrada Sandstone KW - traps KW - shear KW - cap rocks KW - lithostatic pressure KW - Utah KW - clastic rocks KW - pore water KW - permeability KW - field studies KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629939630?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=AAPG+Bulletin&rft.atitle=Failure+of+cap-rock+seals+as+determined+from+mechanical+stratigraphy%2C+stress+history%2C+and+tensile-failure+analysis+of+exhumed+analogs&rft.au=Petrie%2C+E+S%3BEvans%2C+J+P%3BBauer%2C+S+J&rft.aulast=Petrie&rft.aufirst=E&rft.date=2014-11-01&rft.volume=98&rft.issue=11&rft.spage=2365&rft.isbn=&rft.btitle=&rft.title=AAPG+Bulletin&rft.issn=01491423&rft_id=info:doi/10.1306%2F06171413126 L2 - http://aapgbull.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States N1 - Date revised - 2014-01-01 N1 - Number of references - 70 N1 - PubXState - OK N1 - Document feature - illus. incl. strat. cols., 2 tables, sketch map N1 - Last updated - 2014-12-04 N1 - CODEN - AABUD2 N1 - SubjectsTermNotLitGenreText - cap rocks; Carmel Formation; clastic rocks; Cretaceous; dilatancy; dip; Entrada Sandstone; exhumation; experimental studies; extension tectonics; failures; faults; field studies; fractures; Jurassic; laboratory studies; lithostatic pressure; loading; Mancos Shale; mechanical properties; Mesozoic; models; mudstone; normal faults; Organ Rock Formation; outcrops; Paleozoic; permeability; petroleum; pore water; sedimentary rocks; shear; siltstone; southeastern Utah; strength; stress; tectonics; traps; United States; Upper Jurassic; Utah; X-ray diffraction data DO - http://dx.doi.org/10.1306/06171413126 ER - TY - JOUR T1 - Reconsidering remap methods AN - 1611624440; 20813551 AB - Methods for discretizing remap are often based on algorithms developed for hyperbolic conservation laws. Because its introduction in 1977 Van Leer's monotonicity-preserving piecewise linear method and its extensions have been ubiquitous in remap "Van Leer's fourth paper in his series "Towards the Ultimate"". In that 1977 paper, Van Leer introduced another five algorithms, which largely have not been used for remap despite the observation that the piecewise linear method had the least favorable theoretical properties. This adoption parallels the algorithmic choices in other related fields. Two factors have led to the lack of attraction to the five algorithms: the simplicity and effectiveness of the piecewise linear method and complications in practical implementation of the other methods. Plainly stated, Van Leer's piecewise linear method enabled ALE methods to move forward by providing a high-resolution, monotonicity-preserving remap. As a cell-centered scheme, the extension to remap was straightforward. Several factors may be conspiring to reconsider these methods anew: computing architectures are more favorable toward more floating point intensive methods, methods lacking data movement, and 30years of experience in devising nonlinear stability mechanisms (i.e., limiters). In particular, one of the methods blends characteristics of finite volume and finite difference methods together in an ingenious manner that has exceptional numerical properties and should be considered as a viable alternative to the ubiquitous piecewise linear method. Published 2014. This article is a U.S. Government work and is in the public domain in the USA. By reconsidering remap methods, we explore the path not taken by the community. First, we reexamine Van Leer's novel methods and then follow with the development of a number of potentially useful methods based on these principles. Many of these methods may be extremely beneficial in a modern context, allowing greater accuracy and higher performance than the methods currently used. JF - International Journal for Numerical Methods in Fluids AU - Rider, William J AD - Sandia National Laboratories, Albuquerque, NM 87185, USA. Y1 - 2014/11// PY - 2014 DA - November 2014 SP - 587 EP - 610 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 76 IS - 9 SN - 0271-2091, 0271-2091 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Mathematical models KW - Algorithms KW - Architecture KW - Floating KW - Finite Difference Methods KW - USA KW - Fluid dynamics KW - Conservation KW - Finite difference method KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - Q2 09123:Conservation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1611624440?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+for+Numerical+Methods+in+Fluids&rft.atitle=Reconsidering+remap+methods&rft.au=Rider%2C+William+J&rft.aulast=Rider&rft.aufirst=William&rft.date=2014-11-01&rft.volume=76&rft.issue=9&rft.spage=587&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+Methods+in+Fluids&rft.issn=02712091&rft_id=info:doi/10.1002%2Ffld.3950 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Mathematical models; Fluid dynamics; Finite difference method; Finite Difference Methods; Algorithms; Architecture; Conservation; Floating; USA DO - http://dx.doi.org/10.1002/fld.3950 ER - TY - JOUR T1 - Quantum-size-controlled photoelectrochemical fabrication of epitaxial InGaN quantum dots. AN - 1609507698; 25171507 AB - We demonstrate a new route to the precision fabrication of epitaxial semiconductor nanostructures in the sub-10 nm size regime: quantum-size-controlled photoelectrochemical (QSC-PEC) etching. We show that quantum dots (QDs) can be QSC-PEC-etched from epitaxial InGaN thin films using narrowband laser photoexcitation, and that the QD sizes (and hence bandgaps and photoluminescence wavelengths) are determined by the photoexcitation wavelength. Low-temperature photoluminescence from ensembles of such QDs have peak wavelengths that can be tunably blue shifted by 35 nm (from 440 to 405 nm) and have line widths that narrow by 3 times (from 19 to 6 nm). JF - Nano letters AU - Xiao, Xiaoyin AU - Fischer, Arthur J AU - Wang, George T AU - Lu, Ping AU - Koleske, Daniel D AU - Coltrin, Michael E AU - Wright, Jeremy B AU - Liu, Sheng AU - Brener, Igal AU - Subramania, Ganapathi S AU - Tsao, Jeffrey Y AD - Solid-State Lighting Science Energy Frontier Research Center and ‡Center for Integrated Nanotechnologies, Sandia National Laboratories , Albuquerque, New Mexico 87185, United States. Y1 - 2014/10/08/ PY - 2014 DA - 2014 Oct 08 SP - 5616 EP - 5620 VL - 14 IS - 10 KW - InGaN KW - Quantum dots KW - photoelectrochemical etching KW - quantum-size effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1609507698?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nano+letters&rft.atitle=Quantum-size-controlled+photoelectrochemical+fabrication+of+epitaxial+InGaN+quantum+dots.&rft.au=Xiao%2C+Xiaoyin%3BFischer%2C+Arthur+J%3BWang%2C+George+T%3BLu%2C+Ping%3BKoleske%2C+Daniel+D%3BColtrin%2C+Michael+E%3BWright%2C+Jeremy+B%3BLiu%2C+Sheng%3BBrener%2C+Igal%3BSubramania%2C+Ganapathi+S%3BTsao%2C+Jeffrey+Y&rft.aulast=Xiao&rft.aufirst=Xiaoyin&rft.date=2014-10-08&rft.volume=14&rft.issue=10&rft.spage=5616&rft.isbn=&rft.btitle=&rft.title=Nano+letters&rft.issn=1530-6992&rft_id=info:doi/10.1021%2Fnl502151k LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-04-22 N1 - Date created - 2014-10-08 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/nl502151k ER - TY - JOUR T1 - Algebraic multigrid techniques for discontinuous Galerkin methods with varying polynomial order AN - 1832598926; 711825-1 AB - We present a parallel algebraic multigrid (AMG) algorithm for the implicit solution of the Darcy problem discretized by the discontinuous Galerkin (DG) method that scales optimally for regular and irregular meshes. The main idea centers on recasting the preconditioning problem so that existing AMG solvers for nodal lower order finite elements can be leveraged. This is accomplished by a transformation operator which maps the solution from a Lagrange basis representation to a Legendre basis representation. While this mapping function must be user supplied, we demonstrate how easily it can be constructed for somepopular finite element representations includingquadrilateral/hexahedral and triangular/tetrahedral DG formulations. Furthermore, we show that the mapping does not depend on the Jacobian transformation between reference and physical space and so it can be constructed with very limited mesh information. Parallel performance studies demonstrate the versatility of this approach. Copyright 2014 Springer International Publishing Switzerland JF - Computational Geosciences AU - Siefert, C AU - Tuminaro, R AU - Gerstenberger, A AU - Scovazzi, G AU - Collis, S S Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 597 EP - 612 PB - Springer, Dordrecht VL - 18 IS - 5 SN - 1420-0597, 1420-0597 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832598926?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computational+Geosciences&rft.atitle=Algebraic+multigrid+techniques+for+discontinuous+Galerkin+methods+with+varying+polynomial+order&rft.au=Siefert%2C+C%3BTuminaro%2C+R%3BGerstenberger%2C+A%3BScovazzi%2C+G%3BCollis%2C+S+S&rft.aulast=Siefert&rft.aufirst=C&rft.date=2014-10-01&rft.volume=18&rft.issue=5&rft.spage=597&rft.isbn=&rft.btitle=&rft.title=Computational+Geosciences&rft.issn=14200597&rft_id=info:doi/10.1007%2Fs10596-014-9419-x L2 - http://www.springerlink.com/content/101744/ LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - SuppNotes - Sandia National Laboratories is a multiprogram laboratory managed and operated, by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the US Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. The authors would like to acknowledge the support of Department of Energy's Office of Science through the SciDAC-e Research Grant "Algebraic Multi-Grid Methods for Modeling and Simulation of Carbon Sequestration Processes on Multi-Core/GPU Architectures," No. 10-014677. SAND Number 2012-9105J. N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1007/s10596-014-9419-x ER - TY - JOUR T1 - Modeling the hydro-mechanical responses of strip and circular punch loadings on water-saturated collapsible geomaterials AN - 1832594288; 712573-12 AB - A stabilized enhanced strain finite element procedure for poromechanics is fully integrated with an elasto-plastic cap model to simulate the hydro-mechanical interactions of fluid-infiltrating porous rocks with associative and non-associative plastic flow. We present a quantitative analysis on how macroscopic plastic volumetric response caused by pore collapse and grain rearrangement affects the seepage of pore fluid, and vice versa. Results of finite element simulations imply that the dissipation of excess pore pressure may significantly affect the stress path and thus alter the volumetric plastic responses. Copyright 2014 Springer-Verlag Berlin Heidelberg and 2013 Springer-Verlag (outside the USA) JF - Acta Geotechnica (Berlin) AU - Sun, WaiChing AU - Chen, Qiushi AU - Ostien, Jakob T Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 903 EP - 934 PB - Springer-Verlag, co-published with Versita, Heidelberg-Berlin VL - 9 IS - 5 SN - 1861-1125, 1861-1125 KW - clay KW - soil mechanics KW - sand KW - hydraulics KW - collapse structures KW - clastic sediments KW - loading KW - mechanical properties KW - seepage KW - compaction KW - finite element analysis KW - pore pressure KW - elastoplastic materials KW - sediments KW - constitutive equations KW - plasticity KW - confining pressure KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832594288?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Acta+Geotechnica+%28Berlin%29&rft.atitle=Modeling+the+hydro-mechanical+responses+of+strip+and+circular+punch+loadings+on+water-saturated+collapsible+geomaterials&rft.au=Sun%2C+WaiChing%3BChen%2C+Qiushi%3BOstien%2C+Jakob+T&rft.aulast=Sun&rft.aufirst=WaiChing&rft.date=2014-10-01&rft.volume=9&rft.issue=5&rft.spage=903&rft.isbn=&rft.btitle=&rft.title=Acta+Geotechnica+%28Berlin%29&rft.issn=18611125&rft_id=info:doi/10.1007%2Fs11440-013-0276-x L2 - http://www.springerlink.com/content/1861-1133/?p LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - clastic sediments; clay; collapse structures; compaction; confining pressure; constitutive equations; elastoplastic materials; finite element analysis; hydraulics; loading; mechanical properties; plasticity; pore pressure; sand; sediments; seepage; soil mechanics DO - http://dx.doi.org/10.1007/s11440-013-0276-x ER - TY - JOUR T1 - Embedded resource accounting for coupled natural-human systems; an application to water resource impacts of the Western U.S. electrical energy trade AN - 1660635092; 2015-019523 AB - In complex coupled natural-human systems (CNH), multitype networks link social, environmental, and economic systems with flows of matter, energy, information, and value. Embedded Resource Accounting (ERA) is a systems analysis framework that includes the indirect connections of a multitype CNH network. ERA is conditioned on perceived system boundaries, which may vary according to the accountant's point of view. Both direct and indirect impacts are implicit whenever two subnetworks interact in such a system; the ratio of two subnetworks' impacts is the embedded intensity. For trade in the services of water, this is understood as the indirect component of a water footprint, and as "virtual water" trade. ERA is a generalization of input-output, footprint, and substance flow methods, and is a type of life cycle analysis. This paper presents results for the water and electrical energy system in the western U.S. This system is dominated by California, which outsources the majority of its water footprint of electrical energy. Electricity trade increases total water consumption for electricity production in the western U.S. by 15% and shifts water use to water-stressed Colorado River Basin States. A systemic underaccounting for water footprints occurs because state-level processes discount a portion of the water footprint occurring outside of the state boundary. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Ruddell, Benjamin L AU - Adams, Elizabeth A AU - Rushforth, Richard AU - Tidwell, Vincent C Y1 - 2014/10// PY - 2014 DA - October 2014 SP - 7957 EP - 7972 PB - American Geophysical Union, Washington, DC VL - 50 IS - 10 SN - 0043-1397, 0043-1397 KW - United States KW - networks KW - water supply KW - Colorado River basin KW - human activity KW - consumption KW - electrical energy KW - water management KW - effects KW - distribution KW - cost KW - evaluation KW - California KW - Western U.S. KW - systems analysis KW - economics KW - applications KW - water resources KW - energy KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660635092?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Embedded+resource+accounting+for+coupled+natural-human+systems%3B+an+application+to+water+resource+impacts+of+the+Western+U.S.+electrical+energy+trade&rft.au=Ruddell%2C+Benjamin+L%3BAdams%2C+Elizabeth+A%3BRushforth%2C+Richard%3BTidwell%2C+Vincent+C&rft.aulast=Ruddell&rft.aufirst=Benjamin&rft.date=2014-10-01&rft.volume=50&rft.issue=10&rft.spage=7957&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR014531 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 101 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2015-03-05 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - applications; California; Colorado River basin; consumption; cost; distribution; economics; effects; electrical energy; energy; evaluation; human activity; networks; systems analysis; United States; water management; water resources; water supply; Western U.S. DO - http://dx.doi.org/10.1002/2013WR014531 ER - TY - JOUR T1 - On velocity and reactive scalar spectra in turbulent premixed flames AN - 1560136164; 20555095 AB - Kinetic energy and reactive scalar spectra in turbulent premixed flames are studied from compressible three-dimensional direct numerical simulations (DNS) of a temporally evolving rectangular slot-jet premixed flame, a statistically one-dimensional configuration. The flames correspond to a lean premixed hydrogen-air mixture at an equivalence ratio of 0.7, preheated to 700 K and at 1 atm, and three DNS are considered with a fixed jet Reynolds number of 10 000 and a jet Damkohler number varying between 0.13 and 0.54. For the study of spectra, motivated by the need to account for density change, which can be locally strong in premixed flames, a new density-weighted definition for two-point velocity/scalar correlations is proposed. The density-weighted two-point correlation tensor retains the essential properties of its constant-density (incompressible) counterpart and recovers the density-weighted Reynolds stress tensor in the limit of zero separation. The density weighting also allows the derivation of balance equations for velocity and scalar spectrum functions in the wavenumber space that illuminate physics unique to combusting flows. Pressure-dilatation correlation is a source of kinetic energy at high wavenumbers and, analogously, reaction rate-scalar fluctuation correlation is a high-wavenumber source of scalar energy. These results are verified by the spectra constructed from the DNS data. The kinetic energy spectra show a distinct inertial range with a scaling followed by a 'diffusive-reactive' range at higher wavenumbers. The exponential drop-off in this range shows a distinct inflection in the vicinity of the wavenumber corresponding to a laminar flame thickness, , and this is attributed to the contribution from the pressure-dilatation term in the energy balance in wavenumber space. Likewise, a clear spike in spectra of major reactant species (hydrogen) arising from the reaction-rate term is observed at wavenumbers close to . It appears that in the inertial range classical scaling laws for the spectra involving the Kolmogorov scale are applicable, but in the high-wavenumber range where chemical reactions have a strong signature the laminar flame thickness produces a better collapse. It is suggested that a full scaling should perhaps involve the Kolmogorov scale, laminar flame thickness, Damkohler number and Karlovitz number. JF - Journal of Fluid Mechanics AU - Kolla, H AU - Hawkes, E R AU - Kerstein, A R AU - Swaminathan, N AU - Chen, J H AD - Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94550, USA, hnkolla@sandia.gov Y1 - 2014/09/10/ PY - 2014 DA - 2014 Sep 10 SP - 456 EP - 487 PB - Cambridge University Press, The Edinburgh Building, Cambridge CB2 2RU United Kingdom VL - 754 SN - 0022-1120, 0022-1120 KW - Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Correlations KW - Statistical analysis KW - Hydrogen KW - Kinetic Energy KW - Wave spectra KW - Fluid mechanics KW - Chemical Reactions KW - Wave energy KW - Reynolds number KW - Reynolds stress KW - Mathematical models KW - Energy spectra KW - Density KW - Velocity KW - Collapse KW - Stress KW - Fluid Mechanics KW - Numerical simulations KW - Energy balance KW - Chemical reactions KW - Reynolds stresses KW - Scaling KW - Fluctuations KW - Q2 09169:Fluid mechanics KW - M2 551.511:Mechanics and Thermodynamics of the Atmosphere (551.511) KW - SW 6010:Structures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560136164?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Fluid+Mechanics&rft.atitle=On+velocity+and+reactive+scalar+spectra+in+turbulent+premixed+flames&rft.au=Kolla%2C+H%3BHawkes%2C+E+R%3BKerstein%2C+A+R%3BSwaminathan%2C+N%3BChen%2C+J+H&rft.aulast=Kolla&rft.aufirst=H&rft.date=2014-09-10&rft.volume=754&rft.issue=&rft.spage=456&rft.isbn=&rft.btitle=&rft.title=Journal+of+Fluid+Mechanics&rft.issn=00221120&rft_id=info:doi/10.1017%2Fjfm.2014.392 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Fluid mechanics; Wave spectra; Mathematical models; Energy balance; Energy spectra; Chemical reactions; Wave energy; Reynolds number; Reynolds stresses; Reynolds stress; Numerical simulations; Statistical analysis; Correlations; Hydrogen; Density; Chemical Reactions; Stress; Collapse; Velocity; Fluctuations; Scaling; Fluid Mechanics; Kinetic Energy DO - http://dx.doi.org/10.1017/jfm.2014.392 ER - TY - JOUR T1 - Evaluation of a new device for simultaneous measurement of heat flux and gas velocity in a diffusion flame AN - 1683348191; PQ0001584418 AB - This article examines potential use of a new device called multi-directional heat flux and velocity probe for simultaneous measurement of heat flux and flame speed in a diffusion flame. The probe consists of a thin-wall spherical shell with internal insulation to mitigate internal convection. Both pressure and temperature distributions around the sphere are used to indicate local velocity and heat flux. The multi-directional heat flux and velocity probe appears to be a more promising device than the bidirectional velocity probe in the sense that the sphere is a regular geometry with minimum flow separation and should lead to more predictable behavior. However, an outcome of this study is that the device must be used in conjunction with a fire code computational fluid dynamics model because the boundary layer is not isothermal so that the conventional pressure coefficient for a sphere leads to erroneous results. JF - Journal of Fire Sciences AU - Donaldson, Burl AU - Height, Jonathan AU - Gill, Walt AU - Yilmaz, Nadir AD - Fire Science and Technology, Sandia National Laboratories, Albuquerque, NM, USA Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 448 EP - 458 PB - Sage Publications Ltd., 6 Bonhill St. London EC2A 4PU United Kingdom VL - 32 IS - 5 SN - 0734-9041, 0734-9041 KW - Health & Safety Science Abstracts KW - Flame velocity probe KW - flame heat flux probe KW - multi-directional heat flux and velocity probe KW - non-isothermal boundary layer flow KW - Convection KW - Fires KW - Building codes KW - Boundary layers KW - Temperature KW - Fluid dynamics KW - Velocity KW - Diffusion KW - H 7000:Fire Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1683348191?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Fire+Sciences&rft.atitle=Evaluation+of+a+new+device+for+simultaneous+measurement+of+heat+flux+and+gas+velocity+in+a+diffusion+flame&rft.au=Donaldson%2C+Burl%3BHeight%2C+Jonathan%3BGill%2C+Walt%3BYilmaz%2C+Nadir&rft.aulast=Donaldson&rft.aufirst=Burl&rft.date=2014-09-01&rft.volume=32&rft.issue=5&rft.spage=448&rft.isbn=&rft.btitle=&rft.title=Journal+of+Fire+Sciences&rft.issn=07349041&rft_id=info:doi/10.1177%2F0734904114531188 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-05-01 N1 - Number of references - 8 N1 - Last updated - 2015-07-23 N1 - SubjectsTermNotLitGenreText - Convection; Fires; Building codes; Boundary layers; Fluid dynamics; Temperature; Velocity; Diffusion DO - http://dx.doi.org/10.1177/0734904114531188 ER - TY - JOUR T1 - Optimal initial conditions for coupling ice sheet models to Earth system models AN - 1623256282; 2014-089609 AB - We address complications in the coupling of a dynamic ice sheet model (ISM) and forcing from an Earth system model (ESM), which arise because of the unknown ISM initial conditions. Unless explicitly accounted for during ISM initialization, the ice sheet is far from thermomechanical equilibrium with the surface mass balance forcing from the ESM. Upon coupling to ESM forcing, the result is a shock and unphysical and undesirable transients in ice geometry and other state variables. Under the assumption of thermomechanical equilibrium, we present an approach for finding ISM initial conditions-characterized by optimization of the basal sliding coefficient and basal topography fields-that balance a best fit to surface velocity and basal topography observations against the minimization of unphysical transients when coupling to surface mass balance forcing. A quasi-Newton method is used to solve the resulting large-scale, partial differential equation-constrained optimization problem, where the cost function gradients with respect to the parameter fields are computed using adjoints. After studying properties of our approach on a synthetic test problem, we apply the method toward obtaining optimal initial conditions for a model of the Greenland ice sheet. Our results show that, in the presence of uncertainties in the basal topography, ice thickness should also be treated as an optimization variable. While the focus here is on the coupling between an ISM and ESM-derived surface mass balance, the method is easily extended to include optimal coupling to forcing from an ocean model through submarine melt rates. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research: Earth Surface AU - Perego, Mauro AU - Price, Stephen AU - Stadler, Georg Y1 - 2014/09// PY - 2014 DA - September 2014 SP - 1894 EP - 1917 PB - Wiley-Blackwell for American Geophysical Union, Washington, DC VL - 119 IS - 9 SN - 2169-9003, 2169-9003 KW - Arctic region KW - Greenland ice sheet KW - optimization KW - coupling KW - direct problem KW - equilibrium KW - ice sheets KW - noise KW - models KW - Greenland KW - topography KW - mass balance KW - steady-state processes KW - velocity KW - thickness KW - thermomechanical properties KW - applications KW - algorithms KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623256282?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.atitle=Optimal+initial+conditions+for+coupling+ice+sheet+models+to+Earth+system+models&rft.au=Perego%2C+Mauro%3BPrice%2C+Stephen%3BStadler%2C+Georg&rft.aulast=Perego&rft.aufirst=Mauro&rft.date=2014-09-01&rft.volume=119&rft.issue=9&rft.spage=1894&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Earth+Surface&rft.issn=21699003&rft_id=info:doi/10.1002%2F2014JF003181 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292169-9011/issues?year=2013 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 55 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables, sketch map N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - algorithms; applications; Arctic region; coupling; direct problem; equilibrium; Greenland; Greenland ice sheet; ice sheets; mass balance; models; noise; optimization; steady-state processes; thermomechanical properties; thickness; topography; velocity DO - http://dx.doi.org/10.1002/2014JF003181 ER - TY - JOUR T1 - Insulated gate bipolar transistor reliability testing protocol for PV inverter applications AN - 1562668464; 20584442 AB - To decrease the cost of ownership of photovoltaic systems, less costly and more reliable photovoltaic inverters must be developed. Insulated gate bipolar transistors are a significant cause of inverter failures and system inefficiencies, so a thorough understanding of their strengths and weaknesses with regards to inverters is necessary. This paper summarizes the current state of experimentation surrounding the use of IGBTs in photovoltaic inverters and discusses their construction, use, lifetime, and reliability of IGBTs regularly used in photovoltaic inverters. Published 2013. This article is a U.S. Government work and is in the public domain in the USA. To decrease cost of ownership of photovoltaic systems, less costly and more reliable photovoltaic inverters must be developed. Insulated gate bipolar transistors (IGBTs) are a significant cause of inverter failures and system inefficiencies, so a thorough understanding of their strengths and weaknesses with regards to inverters is necessary. This paper summarizes the current state of experimentation surrounding the use of IGBTs in photovoltaic inverters and discusses the construction, use, lifetime, and reliability of IGBTs regularly used in photovoltaic inverters. JF - Progress in Photovoltaics AU - Flicker, Jack AU - Kaplar, Robert AU - Yang, Benjamin AU - Marinella, Matthew AU - Granata, Jennifer AD - Sandia National Laboratories, Albuquerque, NM, USA. Y1 - 2014/09// PY - 2014 DA - Sep 2014 SP - 970 EP - 983 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 22 IS - 9 SN - 1062-7995, 1062-7995 KW - Environment Abstracts KW - Photovoltaics KW - USA KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1562668464?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Progress+in+Photovoltaics&rft.atitle=Insulated+gate+bipolar+transistor+reliability+testing+protocol+for+PV+inverter+applications&rft.au=Flicker%2C+Jack%3BKaplar%2C+Robert%3BYang%2C+Benjamin%3BMarinella%2C+Matthew%3BGranata%2C+Jennifer&rft.aulast=Flicker&rft.aufirst=Jack&rft.date=2014-09-01&rft.volume=22&rft.issue=9&rft.spage=970&rft.isbn=&rft.btitle=&rft.title=Progress+in+Photovoltaics&rft.issn=10627995&rft_id=info:doi/10.1002%2Fpip.2351 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Photovoltaics; USA DO - http://dx.doi.org/10.1002/pip.2351 ER - TY - JOUR T1 - A Bayesian method for using simulator data to enhance human error probabilities assigned by existing HRA methods AN - 1671578066; 20433823 AB - In the past several years, several international organizations have begun to collect data on human performance in nuclear power plant simulators. The data collected provide a valuable opportunity to improve human reliability analysis (HRA), but these improvements will not be realized without implementation of Bayesian methods. Bayesian methods are widely used to incorporate sparse data into models in many parts of probabilistic risk assessment (PRA), but Bayesian methods have not been adopted by the HRA community. In this paper, we provide a Bayesian methodology to formally use simulator data to refine the human error probabilities (HEPs) assigned by existing HRA methods. We demonstrate the methodology with a case study, wherein we use simulator data from the Halden Reactor Project to update the probability assignments from the SPAR-H method. The case study demonstrates the ability to use performance data, even sparse data, to improve existing HRA methods. Furthermore, this paper also serves as a demonstration of the value of Bayesian methods to improve the technical basis of HRA. JF - Reliability Engineering & System Safety AU - Groth, Katrina M AU - Smith, Curtis L AU - Swiler, Laura P AD - Sandia National Laboratories, Albuquerque, NM 87185-0748, USA kgroth@sandia.gov Y1 - 2014/08// PY - 2014 DA - Aug 2014 SP - 32 EP - 40 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 128 SN - 0951-8320, 0951-8320 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Computer and Information Systems Abstracts (CI) KW - Human reliability analysis (HRA) KW - Bayesian inference KW - Simulator data KW - Nuclear power plant KW - Human performance data KW - Nuclear power generation KW - Human error KW - Computer simulation KW - Bayesian analysis KW - Simulation KW - Nuclear reactor components KW - Nuclear engineering KW - Methodology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671578066?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=A+Bayesian+method+for+using+simulator+data+to+enhance+human+error+probabilities+assigned+by+existing+HRA+methods&rft.au=Groth%2C+Katrina+M%3BSmith%2C+Curtis+L%3BSwiler%2C+Laura+P&rft.aulast=Groth&rft.aufirst=Katrina&rft.date=2014-08-01&rft.volume=128&rft.issue=&rft.spage=32&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/10.1016%2Fj.ress.2014.03.010 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2015-05-04 DO - http://dx.doi.org/10.1016/j.ress.2014.03.010 ER - TY - JOUR T1 - The Younger Dryas impact hypothesis; a cosmic catastrophe AN - 1645573547; 2015-006747 AB - In this paper we review the evidence for the Younger Dryas impact hypothesis (YDIH), which proposes that at approximately 12.9 k cal a BP North America, South America, Europe and the Middle East were subjected to some sort of extraterrestrial event. This purported event is proposed as a catastrophic process responsible for: terminal Pleistocene environmental changes (onset of YD cooling, continent-scale wildfires); extinction of late Pleistocene mammals; and demise of the Clovis 'culture' in North America, the earliest well-documented, continent-scale settlement of the region. The basic physics in the YDIH is not in accord with the physics of impacts nor the basic laws of physics. No YD boundary (YDB) crater, craters or other direct indicators of an impact are known. Age control is weak to non-existent at 26 of the 29 localities claimed to have evidence for the YDIH. Attempts to reproduce the results of physical and geochemical analyses used to support the YDIH have failed or show that many indicators are not unique to an impact nor to approximately 12.9 k cal a BP. The depositional environments of purported indicators at most sites tend to concentrate particulate matter and probably created many 'YDB zones'. Geomorphic, stratigraphic and fire records show no evidence of any sort of catastrophic changes in the environment at or immediately following the YDB. Late Pleistocene extinctions varied in time and across space. Archeological data provide no indication of population decline, demographic collapse or major adaptive shifts at or just after approximately 12.9 ka. The data and the hypotheses generated by YDIH proponents are contradictory, inconsistent and incoherent. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - JQS. Journal of Quaternary Science AU - Holliday, Vance T AU - Surovell, Todd AU - Meltzer, David J AU - Grayson, Donald K AU - Boslough, Mark Y1 - 2014/08// PY - 2014 DA - August 2014 SP - 515 EP - 530 PB - John Wiley and Sons for the Quaternary Research Association, Chichester VL - 29 IS - 6 SN - 0267-8179, 0267-8179 KW - United States KW - lithostratigraphy KW - Laurentide ice sheet KW - playas KW - paleoclimatology KW - paleoecology KW - upper Pleistocene KW - fires KW - Cenozoic KW - upper Weichselian KW - Weichselian KW - Clovis KW - Great Lakes KW - Younger Dryas KW - North America KW - Chordata KW - Carolina Bays KW - archaeology KW - Quaternary KW - Mammalia KW - impacts KW - ice sheets KW - comets KW - craters KW - Pleistocene KW - mass extinctions KW - Vertebrata KW - Tetrapoda KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645573547?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=JQS.+Journal+of+Quaternary+Science&rft.atitle=The+Younger+Dryas+impact+hypothesis%3B+a+cosmic+catastrophe&rft.au=Holliday%2C+Vance+T%3BSurovell%2C+Todd%3BMeltzer%2C+David+J%3BGrayson%2C+Donald+K%3BBoslough%2C+Mark&rft.aulast=Holliday&rft.aufirst=Vance&rft.date=2014-08-01&rft.volume=29&rft.issue=6&rft.spage=515&rft.isbn=&rft.btitle=&rft.title=JQS.+Journal+of+Quaternary+Science&rft.issn=02678179&rft_id=info:doi/10.1002%2Fjqs.2724 L2 - http://www3.interscience.wiley.com/cgi-bin/jhome/2507 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2015-01-01 N1 - Number of references - 145 N1 - Document feature - illus. incl. sketch maps N1 - SuppNotes - Includes appendix N1 - Last updated - 2015-01-15 N1 - SubjectsTermNotLitGenreText - archaeology; Carolina Bays; Cenozoic; Chordata; Clovis; comets; craters; fires; Great Lakes; ice sheets; impacts; Laurentide ice sheet; lithostratigraphy; Mammalia; mass extinctions; North America; paleoclimatology; paleoecology; playas; Pleistocene; Quaternary; Tetrapoda; United States; upper Pleistocene; upper Weichselian; Vertebrata; Weichselian; Younger Dryas DO - http://dx.doi.org/10.1002/jqs.2724 ER - TY - JOUR T1 - ANALYSIS OF FISSION AND ACTIVATION RADIONUCLIDES PRODUCED BY A URANIUM-FUELED NUCLEAR DETONATION AND IDENTIFICATION OF THE TOP DOSE-PRODUCING RADIONUCLIDES AN - 1622598772; 20587249 AB - The radiological assessment of the nuclear fallout (i.e., fission and neutron-activation radionuclides) from a nuclear detonation is complicated by the large number of fallout radionuclides. This paper provides the initial isotopic source term inventory of the fallout from a uranium-fueled nuclear detonation and identifies the significant and insignificant radiological dose producing radionuclides over 11 dose integration time periods (time phases) of interest. A primary goal of this work is to produce a set of consistent, time phase-dependent lists of the top dose-producing radionuclides that can be used to prepare radiological assessment calculations and data products (e.g., maps of areas that exceed protective action guidelines) in support of public and worker protection decisions. The ranked lists of top dose-producing radionuclides enable assessors to perform atmospheric dispersion modeling and radiological dose assessment modeling more quickly by using relatively short lists of radionuclides without significantly compromising the accuracy of the modeling and the dose projections. This paper also provides a superset-list of the top dose-producing fallout radionuclides from a uranium-fueled nuclear detonation that can be used to perform radiological assessments over any desired time phase. Furthermore, this paper provides information that may be useful to monitoring and sampling and laboratory analysis personnel to help understand which radionuclides are of primary concern. Finally, this paper may be useful to public protection decision makers because it shows the importance of quickly initiating public protection actions to minimize the radiological dose from fallout. JF - Health Physics AU - Kraus, Terry AU - Foster, Kevin AD - Sandia National Laboratories, P.O. 5800, Mail Stop 0791, Albuquerque, NM 87185-0791, tdkraus@sandia.gov Y1 - 2014/08// PY - 2014 DA - Aug 2014 SP - 150 EP - 163 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 107 IS - 2 SN - 0017-9078, 0017-9078 KW - Pollution Abstracts KW - atomic bomb KW - dose assessment KW - fallout KW - nuclear weapons KW - Guidelines KW - Pollution dispersion KW - Radioisotopes KW - P 0000:AIR POLLUTION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1622598772?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Health+Physics&rft.atitle=ANALYSIS+OF+FISSION+AND+ACTIVATION+RADIONUCLIDES+PRODUCED+BY+A+URANIUM-FUELED+NUCLEAR+DETONATION+AND+IDENTIFICATION+OF+THE+TOP+DOSE-PRODUCING+RADIONUCLIDES&rft.au=Kraus%2C+Terry%3BFoster%2C+Kevin&rft.aulast=Kraus&rft.aufirst=Terry&rft.date=2014-08-01&rft.volume=107&rft.issue=2&rft.spage=150&rft.isbn=&rft.btitle=&rft.title=Health+Physics&rft.issn=00179078&rft_id=info:doi/10.1097%2FHP.0000000000000086 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-11-01 N1 - Last updated - 2015-05-27 N1 - SubjectsTermNotLitGenreText - Pollution dispersion; Guidelines; Radioisotopes DO - http://dx.doi.org/10.1097/HP.0000000000000086 ER - TY - JOUR T1 - Drop mass transfer in a microfluidic chip compared to a centrifugal contactor AN - 1554944279; 20235428 AB - A model system was developed for enabling a multiscale understanding of centrifugal-contactor liquid-liquid extraction. The system consisted of Nd(III)+xylenol orange in the aqueous phase buffered to pH=5.5 by KHP, and dodecane+thenoyltrifluroroacetone (HTTA)+tributyphosphate (TBP) in the organic phase. Diffusion constants were measured for neodymium in both the organic and aqueous phases, and the Nd(III) partition coefficients were measured at various HTTA and TBP concentrations. A microfluidic channel was used as a high-shear model environment to observe mass transfer on a droplet scale with xylenol orange as the aqueous-phase metal indicator; mass-transfer rates were measured quantitatively in both diffusion and reaction limited regimes on the droplet scale. The microfluidic results were comparable to observations made for the same system in a laboratory scale liquid-liquid centrifugal contactor, indicating that single drop microfluidic experiments can provide information on mass transfer in complicated flows and geometries. copyright 2014 American Institute of Chemical Engineers AIChE J, 60: 3071-3078, 2014 JF - AICHE Journal AU - Nemer, Martin B AU - Roberts, Christine C AU - Hughes, Lindsey G AU - Wyatt, Nicholas B AU - Brooks, Carlton F AU - Rao, Rekha AD - Sandia National Laboratories, Albuquerque, NM 87123. Y1 - 2014/08// PY - 2014 DA - Aug 2014 SP - 3071 EP - 3078 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 60 IS - 8 SN - 0001-1541, 0001-1541 KW - Environment Abstracts KW - Metals KW - Laboratory testing KW - Neodymium KW - Diffusion KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1554944279?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=AICHE+Journal&rft.atitle=Drop+mass+transfer+in+a+microfluidic+chip+compared+to+a+centrifugal+contactor&rft.au=Nemer%2C+Martin+B%3BRoberts%2C+Christine+C%3BHughes%2C+Lindsey+G%3BWyatt%2C+Nicholas+B%3BBrooks%2C+Carlton+F%3BRao%2C+Rekha&rft.aulast=Nemer&rft.aufirst=Martin&rft.date=2014-08-01&rft.volume=60&rft.issue=8&rft.spage=3071&rft.isbn=&rft.btitle=&rft.title=AICHE+Journal&rft.issn=00011541&rft_id=info:doi/10.1002%2Faic.14510 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Metals; Laboratory testing; Neodymium; Diffusion DO - http://dx.doi.org/10.1002/aic.14510 ER - TY - JOUR T1 - Electrostatically tuned self-assembly of branched amphiphilic peptides. AN - 1548634760; 24945080 AB - Electrostatics plays an important role in the self-assembly of amphiphilic peptides. To develop a molecular understanding of the role of the electrostatic interactions, we develop a coarse-grained model peptide and apply self-consistent field theory to investigate the peptide assembly into a variety of aggregate nanostructures. We find that the presence and distribution of charged groups on the hydrophilic branches of the peptide can modify the molecular configuration from extended to collapsed. This change in molecular configuration influences the packing into spherical micelles, cylindrical micelles (nanofibers), or planar bilayers. The effects of charge distribution therefore have important implications for the design and utility of functional materials based on peptides. JF - The journal of physical chemistry. B AU - Ting, Christina L AU - Frischknecht, Amalie L AU - Stevens, Mark J AU - Spoerke, Erik D AD - Computational Materials and Data Science, ‡Center for Integrated Nanotechnologies, and ¶Electronic, Optical, and NanoMaterials, Sandia National Laboratories , Albuquerque, New Mexico 87185, United States. Y1 - 2014/07/24/ PY - 2014 DA - 2014 Jul 24 SP - 8624 EP - 8630 VL - 118 IS - 29 KW - Lipid Bilayers KW - 0 KW - Micelles KW - Peptides KW - Index Medicus KW - Hydrophobic and Hydrophilic Interactions KW - Nanostructures -- chemistry KW - Thermodynamics KW - Lipid Bilayers -- chemistry KW - Protein Conformation KW - Static Electricity KW - Models, Molecular KW - Peptides -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1548634760?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+journal+of+physical+chemistry.+B&rft.atitle=Electrostatically+tuned+self-assembly+of+branched+amphiphilic+peptides.&rft.au=Ting%2C+Christina+L%3BFrischknecht%2C+Amalie+L%3BStevens%2C+Mark+J%3BSpoerke%2C+Erik+D&rft.aulast=Ting&rft.aufirst=Christina&rft.date=2014-07-24&rft.volume=118&rft.issue=29&rft.spage=8624&rft.isbn=&rft.btitle=&rft.title=The+journal+of+physical+chemistry.+B&rft.issn=1520-5207&rft_id=info:doi/10.1021%2Fjp503414p LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-09-30 N1 - Date created - 2014-07-24 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/jp503414p ER - TY - JOUR T1 - Understanding the role of water during ionic liquid pretreatment of lignocellulose: co-solvent or anti-solvent? AN - 1554944650; 20476759 AB - Biomass pretreatment with certain ionic liquids (IL) can be highly effective at generating a substrate that can be easily saccharified into fermentable sugars with high yields. In order to improve overall process economics, using mixtures of these ILs with water are more favored over the use of anhydrous IL; however, the solvent property of IL-water mixtures and correlations between cellulose digestibility, cellulose solvation and lignin depolymerization during IL-water pretreatment of lignocellulosic biomass are not well understood. We investigated pretreatment of switchgrass with mixtures of 1-ethyl-3-methylimidazolium acetate, [C sub(2)mim][OAc], and water at 160 degree C. Results indicate that the chemical composition and crystallinity of the pretreated biomass, and the corresponding lignin dissolution and depolymerization, were dependent on [C sub(2)mim][OAc] concentration that correlated strongly with cellulose digestibility. In addition, the hydrogen bond basicity of the [C sub(2)mim][OAc]-water mixtures was found to be a good indicator of cellulose dissolution, lignin depolymerization, and sugar yields. Molecular dynamics simulations provided molecular level explanations on cellulose I sub( beta ) dissolution at different [C sub(2)mim][OAc]-water loadings. The knowledge gained from this study provides a better understanding of the duality of water as a co-solvent/anti-solvent in dissolving cellulose and serves as a design basis for the targeted design of IL-water mixtures that are effective at biomass pretreatment. JF - Green Chemistry AU - Shi, Jian AU - Balamurugan, Kanagasabai AU - Parthasarathi, Ramakrishnan AU - Sathitsuksanoh, Noppadon AU - Zhang, Sonny AU - Stavila, Vitalie AU - Subramanian, Venkatesan AU - Simmons, Blake A AU - Singh, Seema AD - Deconstruction Division; Joint BioEnergy Institute; Emeryville; CA; USA; +1 510-486-4252; +1 925-294-4551; , seesing@sandia.gov Y1 - 2014/07// PY - 2014 DA - July 2014 SP - 3830 EP - 3840 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 16 IS - 8 SN - 1463-9262, 1463-9262 KW - Sustainability Science Abstracts KW - Chemical composition KW - Cellulose KW - Economics KW - Green development KW - Solvents KW - Simulation KW - Water wells KW - Hydrogen KW - Biomass KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1554944650?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Green+Chemistry&rft.atitle=Understanding+the+role+of+water+during+ionic+liquid+pretreatment+of+lignocellulose%3A+co-solvent+or+anti-solvent%3F&rft.au=Shi%2C+Jian%3BBalamurugan%2C+Kanagasabai%3BParthasarathi%2C+Ramakrishnan%3BSathitsuksanoh%2C+Noppadon%3BZhang%2C+Sonny%3BStavila%2C+Vitalie%3BSubramanian%2C+Venkatesan%3BSimmons%2C+Blake+A%3BSingh%2C+Seema&rft.aulast=Shi&rft.aufirst=Jian&rft.date=2014-07-01&rft.volume=16&rft.issue=8&rft.spage=3830&rft.isbn=&rft.btitle=&rft.title=Green+Chemistry&rft.issn=14639262&rft_id=info:doi/10.1039%2Fc4gc00373j LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-01 N1 - Number of references - 57 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Chemical composition; Green development; Economics; Cellulose; Solvents; Water wells; Simulation; Hydrogen; Biomass DO - http://dx.doi.org/10.1039/c4gc00373j ER - TY - JOUR T1 - Influence of Mg (super 2+) on CaCO (sub 3) precipitation during subsurface reactive transport in a homogeneous silicon-etched pore network AN - 1553087730; 2014-062046 AB - Calcium carbonate (CaCO (sub 3) ) geochemical reactions exert a fundamental control on the evolution of porosity and permeability in shallow-to-deep subsurface siliciclastic and limestone rock reservoirs. As a result, these carbonate water-rock interactions play a critically important role in research on groundwater remediation, geological carbon sequestration, and hydrocarbon exploration. A study was undertaken to determine the effects of Mg (super 2+) concentration on CaCO (sub 3) crystal morphology, precipitation rate, and porosity occlusion under flow and mixing conditions similar to those in subsurface aquifers. This was accomplished by promoting CaCO (sub 3) precipitation through the mixing of two solutions flowing parallel to each other in a microfluidic pore structure, containing uniform concentrations of dissolved Ca (super 2+) and carbonate (CO (sub 3) (super 2-) ), and systematic variations in the concentration of Mg (super 2+) . Raman spectroscopy indicates that all three polymorphs of CaCO (sub 3) (calcite, aragonite, and vaterite) were present under all experimental conditions. Coordinated brightfield imaging results show the morphology of calcite with increasing Mg (super 2+) progressed from blocky and dogtooth approximately 10-80mu m in size, to anhedral spheroidal approximately 5-30mu m in size. The morphology of aragonite with increasing Mg (super 2+) progressed from shrubs and fuzzy dumbells to spheroidal, and the size increased from approximately 5-60mu m to 20-200mu m. Recrystallization was observed in all experiments, but more so at low Mg (super 2+) , in which many small microcrystals dissolved and re-precipitated as one or a few larger calcite crystals. Analysis of brightfield images indicates calcite is the most abundant polymorph under all conditions. However, the area of pore space with aragonite increased from 20% at the highest Mg (super 2+) concentration. The initial apparent precipitation rate of mineral polymorphs with no Mg (super 2+) present was 2.5 times greater than when 40mM Mg (super 2+) was added, and large (20-200mu m) aragonite crystals formed primarily near to and below the center mixing zone with increasing Mg (super 2+) concentration. Pore-scale modeling results are consistent with experiments, and indicate that all three polymorphs are thermodynamically favorable, with calcite and aragonite being the most favorable and having similar saturation ratios (SR>100). The influence of Mg (super 2+) on mineral precipitation rates is consistent with previous studies showing that calcite precipitation rates decrease with increasing Mg (super 2+) concentrations. The precipitation of aragonite below the center-mixing zone is not predicted by thermodynamic SRs, but is consistent with the literature and our modeling results showing aragonite precipitation is kinetically more favorable in regions with higher Mg (super 2+) /Ca (super 2+) ratios. Hence, both thermodynamic and kinetic constraints affect precipitation rates, the distribution of mineral polymorphs, and the corresponding extent of porosity occlusion. A tracer study demonstrated that mineral precipitation along the center-mixing zone under all experimental conditions led to substantial pore blockage. Imaging results suggest that with increasing Mg (super 2+) concentration, slower crystal growth rates will increase the time period before pore blockage occurs, and the transition to more spherical and larger aragonite crystals below the center mixing line will increase pore occlusion and decrease mixing. Hence, understanding how Mg (super 2+) affects calcium carbonate precipitation is very important for predicting mixing and reactive transport in subsurface reservoirs. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Boyd, Victoria AU - Yoon, Hongkyu AU - Zhang, Changyong AU - Oostrom, Mart AU - Hess, Nancy AU - Fouke, Bruce AU - Valocchi, Albert J AU - Werth, Charles J Y1 - 2014/06/15/ PY - 2014 DA - 2014 Jun 15 SP - 321 EP - 335 PB - Elsevier, New York, NY VL - 135 SN - 0016-7037, 0016-7037 KW - calcium KW - petroleum exploration KW - magnesium KW - petroleum KW - gas storage KW - aqueous solutions KW - reservoir rocks KW - remediation KW - ground water KW - carbon dioxide KW - air pollution KW - reactivity KW - sedimentary rocks KW - polymorphism KW - transport KW - calcium carbonate KW - spectra KW - water pollution KW - alkaline earth metals KW - experimental studies KW - carbon sequestration KW - pollutants KW - pollution KW - X-ray spectra KW - porosity KW - Mg/Ca KW - EDS spectra KW - aquifers KW - models KW - Raman spectra KW - precipitation KW - metals KW - mathematical methods KW - reservoir properties KW - crystal chemistry KW - carbonate rocks KW - water resources KW - carbonates KW - permeability KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553087730?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Influence+of+Mg+%28super+2%2B%29+on+CaCO+%28sub+3%29+precipitation+during+subsurface+reactive+transport+in+a+homogeneous+silicon-etched+pore+network&rft.au=Boyd%2C+Victoria%3BYoon%2C+Hongkyu%3BZhang%2C+Changyong%3BOostrom%2C+Mart%3BHess%2C+Nancy%3BFouke%2C+Bruce%3BValocchi%2C+Albert+J%3BWerth%2C+Charles+J&rft.aulast=Boyd&rft.aufirst=Victoria&rft.date=2014-06-15&rft.volume=135&rft.issue=&rft.spage=321&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2014.03.018 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 79 N1 - PubXState - NY N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-08-14 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - air pollution; alkaline earth metals; aqueous solutions; aquifers; calcium; calcium carbonate; carbon dioxide; carbon sequestration; carbonate rocks; carbonates; crystal chemistry; EDS spectra; experimental studies; gas storage; ground water; magnesium; mathematical methods; metals; Mg/Ca; models; permeability; petroleum; petroleum exploration; pollutants; pollution; polymorphism; porosity; precipitation; Raman spectra; reactivity; remediation; reservoir properties; reservoir rocks; sedimentary rocks; spectra; transport; water pollution; water resources; X-ray spectra DO - http://dx.doi.org/10.1016/j.gca.2014.03.018 ER - TY - JOUR T1 - Nanogeochemistry; nanostructures, emergent properties and their control on geochemical reactions and mass transfers AN - 1553087546; 2014-062280 AB - Nanogeochemistry-a newly emerging research field-attempts to understand geochemical reactions and mass transfers at nanometer scales, especially with regards to the formation of nanostructures in geochemical systems, emergent properties of these structures, and their controls on geochemical processes. The research also includes use of nanotechnology to design new materials and engineering approaches for effective natural resource extraction and environmental management. At the core of this new research field is the concept that, as the size of a material is reduced to nanometers, novel physical or chemical properties of the material may emerge that can be drastically different from those of the corresponding bulk phase and the material properties then become size-dependent. Nanostructures, which frequently occur in geologic materials, may directly control mineral phase stability, mineral-water interface chemistry, geochemical reaction kinetics, geo-fluid migration and transport, and even global biogeochemical cycles as a whole. This paper aims to provide a comprehensive review of recent progress in nanogeochemical research. The review is focused on two general types of nanostructures-nano solid phases and nanopores (nanofluids)-with an emphasis on the occurrence of each nanostructure in natural environments, the associated emergent properties, and the potential geochemical implications. Stemming from an increasing interest in shale gas research, a special discussion is provided on gas/oil disposition and migration in unconventional low-permeability reservoirs, wherein shale is treated as a nanocomposite material. Nanogeochemistry is a relatively young research field, and much remains to be explored. There is an urgent need for systematically characterizing specific nanostructures over the whole nanometer-size range and developing a general theoretical framework for data analysis and synthesis. There is also a need for developing experimental and modeling techniques to extrapolate the knowledge obtained from simple model systems to complex natural systems. Abstract Copyright (2014) Elsevier, B.V. JF - Chemical Geology AU - Wang, Yifeng Y1 - 2014/06/15/ PY - 2014 DA - 2014 Jun 15 SP - 1 EP - 23 PB - Elsevier, Amsterdam VL - 378-379 SN - 0009-2541, 0009-2541 KW - liquid phase KW - experimental studies KW - grain size KW - fluid phase KW - properties KW - TEM data KW - porosity KW - size KW - solid phase KW - models KW - chemical reactions KW - water-rock interaction KW - mathematical methods KW - chemical properties KW - mass transfer KW - nanoparticles KW - kinetics KW - permeability KW - particles KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553087546?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Nanogeochemistry%3B+nanostructures%2C+emergent+properties+and+their+control+on+geochemical+reactions+and+mass+transfers&rft.au=Wang%2C+Yifeng&rft.aulast=Wang&rft.aufirst=Yifeng&rft.date=2014-06-15&rft.volume=378-379&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2014.04.007 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 215 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-08-14 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - chemical properties; chemical reactions; experimental studies; fluid phase; grain size; kinetics; liquid phase; mass transfer; mathematical methods; models; nanoparticles; particles; permeability; porosity; properties; size; solid phase; TEM data; water-rock interaction DO - http://dx.doi.org/10.1016/j.chemgeo.2014.04.007 ER - TY - JOUR T1 - Mapping water availability, projected use and cost in the western United States AN - 1709182171; PQ0001859739 AB - New demands for water can be satisfied through a variety of source options. In some basins surface and/or groundwater may be available through permitting with the state water management agency (termed unappropriated water), alternatively water might be purchased and transferred out of its current use to another (termed appropriated water), or non-traditional water sources can be captured and treated (e.g., wastewater). The relative availability and cost of each source are key factors in the development decision. Unfortunately, these measures are location dependent with no consistent or comparable set of data available for evaluating competing water sources. With the help of western water managers, water availability was mapped for over 1200 watersheds throughout the western US. Five water sources were individually examined, including unappropriated surface water, unappropriated groundwater, appropriated water, municipal wastewater and brackish groundwater. Also mapped was projected change in consumptive water use from 2010 to 2030. Associated costs to acquire, convey and treat the water, as necessary, for each of the five sources were estimated. These metrics were developed to support regional water planning and policy analysis with initial application to electric transmission planning in the western US. JF - Environmental Research Letters AU - Tidwell, Vincent C AU - Moreland, Barbara D AU - Zemlick, Katie M AU - Roberts, Barry L AU - Passell, Howard D AU - Jensen, Daniel AU - Forsgren, Christopher AU - Sehlke, Gerald AU - Cook, Margaret A AU - King, Carey W AU - Larsen, Sara AD - Sandia National Laboratories, Albuquerque, NM 87185, USA, vctidwe@sandia.gov Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 1 EP - 16 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 9 IS - 6 SN - 1748-9326, 1748-9326 KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Environment Abstracts KW - water planning KW - water availability KW - water cost KW - western United States KW - projected water use KW - Water Costs KW - Surface water KW - Basins KW - Groundwater Basins KW - Watersheds KW - Water availability KW - Water Policy KW - Planning KW - Regional planning KW - Municipal wastes KW - Mapping KW - Policies KW - Water demand KW - Available Water KW - Water use KW - USA KW - Surface-groundwater Relations KW - Water management KW - Groundwater KW - Wastewater KW - AQ 00001:Water Resources and Supplies KW - Q5 08503:Characteristics, behavior and fate KW - SW 1030:Use of water of impaired quality KW - ENA 19:Water Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1709182171?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Research+Letters&rft.atitle=Mapping+water+availability%2C+projected+use+and+cost+in+the+western+United+States&rft.au=Tidwell%2C+Vincent+C%3BMoreland%2C+Barbara+D%3BZemlick%2C+Katie+M%3BRoberts%2C+Barry+L%3BPassell%2C+Howard+D%3BJensen%2C+Daniel%3BForsgren%2C+Christopher%3BSehlke%2C+Gerald%3BCook%2C+Margaret+A%3BKing%2C+Carey+W%3BLarsen%2C+Sara&rft.aulast=Tidwell&rft.aufirst=Vincent&rft.date=2014-06-01&rft.volume=9&rft.issue=6&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Environmental+Research+Letters&rft.issn=17489326&rft_id=info:doi/10.1088%2F1748-9326%2F9%2F6%2F064009 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Water use; Policies; Water management; Regional planning; Watersheds; Water demand; Surface water; Basins; Municipal wastes; Mapping; Groundwater; Water availability; Wastewater; Water Policy; Surface-groundwater Relations; Water Costs; Planning; Available Water; Groundwater Basins; USA DO - http://dx.doi.org/10.1088/1748-9326/9/6/064009 ER - TY - JOUR T1 - Microneedle-Based Transdermal Sensor for On-Chip Potentiometric Determination of K super(+) AN - 1701495700; PQ0001666919 AB - The determination of electrolytes is invaluable for point of care diagnostic applications. An ion selective transdermal microneedle sensor is demonstrated for potassium by integrating a hollow microneedle with a microfluidic chip to extract fluid through a channel towards a downstream solid-state ion-selective-electrode (ISE). 3D porous carbon and 3D porous graphene electrodes, made via interference lithography, are compared as solid-state transducers for ISE's and evaluated for electrochemical performance, stability, and selectivity. The porous carbon K super(+) ISE's show better performance than the porous graphene K super(+) ISE's, capable of measuring potassium across normal physiological concentrations in the presence of interfering ions with greater stability. This new microfluidic/microneedle platform shows promise for medical applications. A new integrated microneedle-based microfluidic platform is described for in vivo potassium sensing. Fluid can be extracted through a hollow microneedle and run over a downstream porous carbon solid state ion selective electrode to detect physiological levels of potassium. JF - Advanced Healthcare Materials AU - Miller, Philip R AU - Xiao, Xiaoyin AU - Brener, Igal AU - Burckel, DBruce AU - Narayan, Roger AU - Polsky, Ronen AD - Sandia National Laboratories, Albuquerque, New Mexico, 87185, USA. Y1 - 2014/06// PY - 2014 DA - Jun 2014 SP - 876 EP - 881 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 3 IS - 6 SN - 2192-2640, 2192-2640 KW - Biotechnology and Bioengineering Abstracts KW - Ions KW - Microfluidics KW - Carbon KW - Electrodes KW - Potassium KW - W 30910:Imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701495700?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advanced+Healthcare+Materials&rft.atitle=Microneedle-Based+Transdermal+Sensor+for+On-Chip+Potentiometric+Determination+of+K+super%28%2B%29&rft.au=Miller%2C+Philip+R%3BXiao%2C+Xiaoyin%3BBrener%2C+Igal%3BBurckel%2C+DBruce%3BNarayan%2C+Roger%3BPolsky%2C+Ronen&rft.aulast=Miller&rft.aufirst=Philip&rft.date=2014-06-01&rft.volume=3&rft.issue=6&rft.spage=876&rft.isbn=&rft.btitle=&rft.title=Advanced+Healthcare+Materials&rft.issn=21922640&rft_id=info:doi/10.1002%2Fadhm.201300541 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Ions; Microfluidics; Carbon; Electrodes; Potassium DO - http://dx.doi.org/10.1002/adhm.201300541 ER - TY - JOUR T1 - Diagnostic Devices: Microneedle-Based Transdermal Sensor for On-Chip Potentiometric Determination of K super(+) (Adv. Healthcare Mater. 6/2014) AN - 1701488996; PQ0001666918 AB - A transdermal sensing platform for detection of electrolytes is developed by P. R. Miller, R. Narayan, R. Polsky and colleagues. On page 876, hollow polymer microneedles are integrated with a microfluidic chip for detecting potassium using a solid state ion selective electrode transducer. The device could one day be used as an on body point-of-care medical diagnostic device. JF - Advanced Healthcare Materials AU - Miller, Philip R AU - Xiao, Xiaoyin AU - Brener, Igal AU - Burckel, DBruce AU - Narayan, Roger AU - Polsky, Ronen AD - Sandia National Laboratories, Albuquerque, New Mexico, 87185, USA. Y1 - 2014/06// PY - 2014 DA - Jun 2014 SP - 948 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 3 IS - 6 SN - 2192-2640, 2192-2640 KW - Biotechnology and Bioengineering Abstracts KW - Microfluidics KW - Electrodes KW - Potassium KW - W 30910:Imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701488996?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advanced+Healthcare+Materials&rft.atitle=Diagnostic+Devices%3A+Microneedle-Based+Transdermal+Sensor+for+On-Chip+Potentiometric+Determination+of+K+super%28%2B%29+%28Adv.+Healthcare+Mater.+6%2F2014%29&rft.au=Miller%2C+Philip+R%3BXiao%2C+Xiaoyin%3BBrener%2C+Igal%3BBurckel%2C+DBruce%3BNarayan%2C+Roger%3BPolsky%2C+Ronen&rft.aulast=Miller&rft.aufirst=Philip&rft.date=2014-06-01&rft.volume=3&rft.issue=6&rft.spage=948&rft.isbn=&rft.btitle=&rft.title=Advanced+Healthcare+Materials&rft.issn=21922640&rft_id=info:doi/10.1002%2Fadhm.201470032 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2015-11-16 N1 - SubjectsTermNotLitGenreText - Microfluidics; Electrodes; Potassium DO - http://dx.doi.org/10.1002/adhm.201470032 ER - TY - JOUR T1 - Interactions of kaolin minerals in the environment AN - 1553088674; 2014-062704 AB - The interactions of ions, organics, and microorganisms at the aqueous interface with kaolin-group minerals control many important geochemical processes in the environment. Kaolinite has both hydrophilic and relatively hydrophobic external surfaces that exhibit different adsorption phenomena. Our understanding of kaolin minerals in the environment is advancing as a result of molecular simulation and field studies. Molecular dynamics simulations reveal the structure and behavior of adsorbed ions and water molecules at the interface. The presence of microorganisms affects the formation and surfaces of kaolinite and halloysite. Mechanisms by which kaolin-group minerals complex, adsorb, and desorb radioactive pollutants in the subsurface can be understood by combining theory with observation. JF - Elements AU - Cygan, Randall T AU - Tazaki, Kazue Y1 - 2014/06// PY - 2014 DA - June 2014 SP - 195 EP - 200 PB - Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society VL - 10 IS - 3 SN - 1811-5209, 1811-5209 KW - silicates KW - desorption KW - radioactivity KW - complexing KW - simulation KW - remediation KW - infrared spectra KW - FTIR spectra KW - sediments KW - interfaces KW - spectra KW - molecular dynamics KW - hydrophilic materials KW - geochemistry KW - mineral surface KW - hydrophobic materials KW - Eh KW - water KW - biomineralization KW - clastic sediments KW - pollutants KW - mineral-water interface KW - kaolinite KW - adsorption KW - bioremediation KW - weathering KW - TEM data KW - clay minerals KW - bacteria KW - kaolin KW - sheet silicates KW - halloysite KW - SEM data KW - microorganisms KW - 01B:Mineralogy of silicates KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553088674?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Elements&rft.atitle=Interactions+of+kaolin+minerals+in+the+environment&rft.au=Cygan%2C+Randall+T%3BTazaki%2C+Kazue&rft.aulast=Cygan&rft.aufirst=Randall&rft.date=2014-06-01&rft.volume=10&rft.issue=3&rft.spage=195&rft.isbn=&rft.btitle=&rft.title=Elements&rft.issn=18115209&rft_id=info:doi/10.2113%2Fgselements.10.3.195 L2 - http://www.elementsmagazine.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2014-01-01 N1 - Number of references - 23 N1 - Document feature - illus. N1 - Last updated - 2014-08-14 N1 - SubjectsTermNotLitGenreText - adsorption; bacteria; biomineralization; bioremediation; clastic sediments; clay minerals; complexing; desorption; Eh; FTIR spectra; geochemistry; halloysite; hydrophilic materials; hydrophobic materials; infrared spectra; interfaces; kaolin; kaolinite; microorganisms; mineral surface; mineral-water interface; molecular dynamics; pollutants; radioactivity; remediation; sediments; SEM data; sheet silicates; silicates; simulation; spectra; TEM data; water; weathering DO - http://dx.doi.org/10.2113/gselements.10.3.195 ER - TY - JOUR T1 - Improved thermodynamic model for interaction of EDTA with trivalent actinides and lanthanide to ionic strength of 6.60 m AN - 1545408681; 2014-055459 AB - The dissociation constants of ethylenediaminetetraacetic acid (H (sub 4) EDTA), and the stability constants of Am (super 3+) , Cm (super 3+) and Eu (super 3+) with EDTA (super 4-) have been determined at 25 degrees C, over a range of concentration varying from 0.1 to 6.60m NaClO (sub 4) using potentiometric titration and an extraction technique, respectively. The formation of only 1:1 complex, M(EDTA) (super -) , where (M=Am (super 3+) , Cm (super 3+) and Eu (super 3+) ), was observed under the experimental conditions. The observed ionic strength dependencies of the dissociation constants and the stability constants have been described successfully over the entire ionic strength range using the Pitzer model. The thermodynamic stability constant: logbeta (sub 101) (super 0) =20.55+ or -0.18 for Am (super 3+) , logbeta (sub 101) (super 0) =20.43+ or -0.20 for Cm (super 3+) and logbeta (sub 101) (super 0) =20.65+ or -0.19 for Eu (super 3+) were calculated by extrapolation of data to zero ionic strength in an NaClO (sub 4) medium. In addition, logbeta (sub 101) (super 0) of 20.05+ or -0.40 for Am (super 3+) was obtained by simultaneously modeling data both in NaCl and NaClO (sub 4) media. For all stability constants, the Pitzer model gives an excellent representation of the data using interaction parameters beta (super (0)) , beta (super (1)) , and C (super phi ) determined in this work. The improved model presented in this work would enable researchers to model accurately the potential mobility of actinides (III) and light rare earth elements to ionic strength of 6.60m in low temperature environments in the presence of EDTA. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Thakur, Punam AU - Xiong, Yongliang AU - Borkowski, Marian AU - Choppin, Gregory R Y1 - 2014/05/15/ PY - 2014 DA - 2014 May 15 SP - 299 EP - 312 PB - Elsevier, New York, NY VL - 133 SN - 0016-7037, 0016-7037 KW - titration KW - isotopes KW - Pitzer model KW - curium KW - temperature KW - models KW - reactivity KW - organic compounds KW - organic acids KW - radioactive isotopes KW - chemical reactions KW - metals KW - EDTA KW - mathematical methods KW - americium KW - carboxylic acids KW - valency KW - rare earths KW - europium KW - thermodynamic properties KW - actinides KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545408681?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Improved+thermodynamic+model+for+interaction+of+EDTA+with+trivalent+actinides+and+lanthanide+to+ionic+strength+of+6.60+m&rft.au=Thakur%2C+Punam%3BXiong%2C+Yongliang%3BBorkowski%2C+Marian%3BChoppin%2C+Gregory+R&rft.aulast=Thakur&rft.aufirst=Punam&rft.date=2014-05-15&rft.volume=133&rft.issue=&rft.spage=299&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2013.09.040 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 69 N1 - PubXState - NY N1 - Document feature - illus. incl. 6 tables N1 - Last updated - 2014-07-17 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - actinides; americium; carboxylic acids; chemical reactions; curium; EDTA; europium; isotopes; mathematical methods; metals; models; organic acids; organic compounds; Pitzer model; radioactive isotopes; rare earths; reactivity; temperature; thermodynamic properties; titration; valency DO - http://dx.doi.org/10.1016/j.gca.2013.09.040 ER - TY - JOUR T1 - A Pitzer model for the Na-Al(OH) (sub 4) -Cl-OH system and solubility of boehmite (AlOOH) to high ionic strength and to 250 degrees C AN - 1549616825; 2014-057901 AB - In this study, a Pitzer model for the Na-Cl-OH-Al(OH) (sub 4) system, and solubility of boehmite (AlOOH) to high ionic strengths, and to high temperatures up to 250 degrees C, has been developed by evaluating equilibrium quotients concerning boehmite in NaCl solutions to 5.0 mol.kg (super -1) , and boehmite solubility data in NaOH solutions to approximately 13mol.kg (super -1) . This model is validated by comparing model-predicted solubilities with solubility data of boehmite in NaOH solutions that are independent from the model development. This model is of value to many fields, including accurate modeling geochemical behavior of aluminum in hydrothermal solutions with high ionic strengths at high temperatures up to 250 degrees C, extraction of aluminum via the Bayer process from various ores, stability of borosilicate glass, aluminum silicate materials as waste forms for long-lived radio nuclides, and bentonite as engineered barrier, in geological repositories. Based on the model developed in this work, solubility of boehmite can be potentially used as a pH (sub m) (hydrogen ion concentration on molal scale) sensor/buffer in hydrothermal experiments under neutral to alkaline conditions in NaCl solutions in the absence of silica. This pH (sub m) sensor/buffer would enable experimentalists to conduct hydrothermal experiments in a wide range ionic strength under well-controlled pH (sub m) conditions. Abstract Copyright (2014) Elsevier, B.V. JF - Chemical Geology AU - Xiong, Yongliang Y1 - 2014/05/12/ PY - 2014 DA - 2014 May 12 SP - 37 EP - 49 PB - Elsevier, Amsterdam VL - 373 SN - 0009-2541, 0009-2541 KW - silicates KW - boehmite KW - experimental studies KW - solutions KW - prediction KW - aqueous solutions KW - solubility KW - Pitzer model KW - temperature KW - hydrothermal conditions KW - clay minerals KW - models KW - borosilicates KW - sodalite group KW - oxides KW - K-bentonite KW - sheet silicates KW - framework silicates KW - sodalite KW - chemical composition KW - pH KW - high temperature KW - P-T conditions KW - 01C:Mineralogy of non-silicates KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549616825?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=A+Pitzer+model+for+the+Na-Al%28OH%29+%28sub+4%29+-Cl-OH+system+and+solubility+of+boehmite+%28AlOOH%29+to+high+ionic+strength+and+to+250+degrees+C&rft.au=Xiong%2C+Yongliang&rft.aulast=Xiong&rft.aufirst=Yongliang&rft.date=2014-05-12&rft.volume=373&rft.issue=&rft.spage=37&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2014.02.018 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 67 N1 - Document feature - illus. incl. 7 tables N1 - Last updated - 2014-07-31 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - aqueous solutions; boehmite; borosilicates; chemical composition; clay minerals; experimental studies; framework silicates; high temperature; hydrothermal conditions; K-bentonite; models; oxides; P-T conditions; pH; Pitzer model; prediction; sheet silicates; silicates; sodalite; sodalite group; solubility; solutions; temperature DO - http://dx.doi.org/10.1016/j.chemgeo.2014.02.018 ER - TY - CPAPER T1 - Are New Neurons in Humans Important? How Scale Affects Neurogenesis Function T2 - 2014 Keystone Symposia Conference on Adult Neurogenesis AN - 1518611160; 6280430 JF - 2014 Keystone Symposia Conference on Adult Neurogenesis AU - Aimone, James Y1 - 2014/05/12/ PY - 2014 DA - 2014 May 12 KW - Neurogenesis KW - Neurons UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518611160?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Keystone+Symposia+Conference+on+Adult+Neurogenesis&rft.atitle=Are+New+Neurons+in+Humans+Important%3F+How+Scale+Affects+Neurogenesis+Function&rft.au=Aimone%2C+James&rft.aulast=Aimone&rft.aufirst=James&rft.date=2014-05-12&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Keystone+Symposia+Conference+on+Adult+Neurogenesis&rft.issn=&rft_id=info:doi/ L2 - http://www.keystonesymposia.org/index.cfm?e=Web.Meeting.Flyer&MeetingID=1304 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - JOUR T1 - Krypton-81 in ground water of the Culebra Dolomite near the Waste Isolation Pilot Plant, New Mexico AN - 1800392910; 2016-054675 AB - The Waste Isolation Pilot Plant (WIPP) in New Mexico is the first geologic repository for disposal of transuranic nuclear waste from defense-related programs of the US Department of Energy. It is constructed within halite beds of the Permian-age Salado Formation. The Culebra Dolomite, confined within Rustler Formation evaporites overlying the Salado Formation, is a potential pathway for radionuclide transport from the repository to the accessible environment in the human-disturbed repository scenario. Although extensive subsurface characterization and numerical flow modeling of groundwater has been done in the vicinity of the WIPP, few studies have used natural isotopic tracers to validate the flow models and to better understand solute transport at this site. The advent of Atom-Trap Trace Analysis (ATTA) has enabled routine measurement of cosmogenic (super 81) Kr (half-life 229,000 yr), a near-ideal tracer for long-term groundwater transport. We measured (super 81) Kr in saline groundwater sampled from two Culebra Dolomite monitoring wells near the WIPP site, and compared (super 81) Kr model ages with reverse particle-tracking results of well-calibrated flow models. The (super 81) Kr model ages are approximately 130,000 and approximately 330,000 yr for high-transmissivity and low-transmissivity portions of the formation, respectively. Compared with flow model results which indicate a relatively young mean hydraulic age ( approximately 32,000 yr), the (super 81) Kr model ages imply substantial physical attenuation of conservative solutes in the Culebra Dolomite and provide limits on the effective diffusivity of contaminants into the confining aquitards. Abstract Copyright (2014) Elsevier, B.V. JF - Journal of Contaminant Hydrology AU - Sturchio, Neil C AU - Kuhlman, Kristopher L AU - Yokochi, Reika AU - Probst, Peter C AU - Jiang, Wei AU - Lu, Zheng-Tian AU - Mueller, Peter AU - Yang, Guo-Min Y1 - 2014/05// PY - 2014 DA - May 2014 SP - 12 EP - 20 PB - Elsevier, Amsterdam VL - 160 SN - 0169-7722, 0169-7722 KW - United States KW - hazardous waste KW - isotopes KW - Eddy County New Mexico KW - calibration KW - Rustler Formation KW - New Mexico KW - dolostone KW - environmental analysis KW - reservoir rocks KW - radioactive waste KW - ground water KW - sedimentary rocks KW - radioactive isotopes KW - dates KW - noble gases KW - absolute age KW - Waste Isolation Pilot Plant KW - Culebra Dolomite Member KW - water pollution KW - saline composition KW - Salado Formation KW - diffusivity KW - monitoring KW - numerical models KW - pollutants KW - Paleozoic KW - isotope ratios KW - pollution KW - aquitards KW - Permian KW - krypton KW - aquifers KW - Kr-81 KW - Upper Permian KW - hydrostratigraphy KW - mathematical methods KW - reservoir properties KW - Carlsbad New Mexico KW - waste disposal KW - carbonate rocks KW - water wells KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1800392910?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Contaminant+Hydrology&rft.atitle=Krypton-81+in+ground+water+of+the+Culebra+Dolomite+near+the+Waste+Isolation+Pilot+Plant%2C+New+Mexico&rft.au=Sturchio%2C+Neil+C%3BKuhlman%2C+Kristopher+L%3BYokochi%2C+Reika%3BProbst%2C+Peter+C%3BJiang%2C+Wei%3BLu%2C+Zheng-Tian%3BMueller%2C+Peter%3BYang%2C+Guo-Min&rft.aulast=Sturchio&rft.aufirst=Neil&rft.date=2014-05-01&rft.volume=160&rft.issue=&rft.spage=12&rft.isbn=&rft.btitle=&rft.title=Journal+of+Contaminant+Hydrology&rft.issn=01697722&rft_id=info:doi/10.1016%2Fj.jconhyd.2014.02.002 L2 - http://www.sciencedirect.com/science/journal/01697722 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 46 N1 - Document feature - illus. incl. 1 table, sketch maps N1 - Last updated - 2016-06-30 N1 - SubjectsTermNotLitGenreText - absolute age; aquifers; aquitards; calibration; carbonate rocks; Carlsbad New Mexico; Culebra Dolomite Member; dates; diffusivity; dolostone; Eddy County New Mexico; environmental analysis; ground water; hazardous waste; hydrostratigraphy; isotope ratios; isotopes; Kr-81; krypton; mathematical methods; monitoring; New Mexico; noble gases; numerical models; Paleozoic; Permian; pollutants; pollution; radioactive isotopes; radioactive waste; reservoir properties; reservoir rocks; Rustler Formation; Salado Formation; saline composition; sedimentary rocks; United States; Upper Permian; waste disposal; Waste Isolation Pilot Plant; water pollution; water wells DO - http://dx.doi.org/10.1016/j.jconhyd.2014.02.002 ER - TY - JOUR T1 - Atomic-layer electroless deposition: a scalable approach to surface-modified metal powders. AN - 1520111301; 24738575 AB - Palladium has a number of important applications in energy and catalysis in which there is evidence that surface modification leads to enhanced properties. A strategy for preparing such materials is needed that combines the properties of (i) scalability (especially on high-surface-area substrates, e.g. powders); (ii) uniform deposition, even on substrates with complex, three-dimensional features; and (iii) low-temperature processing conditions that preserve nanopores and other nanostructures. Presented herein is a method that exhibits these properties and makes use of benign reagents without the use of specialized equipment. By exposing Pd powder to dilute hydrogen in nitrogen gas, sacrificial surface PdH is formed along with a controlled amount of dilute interstitial hydride. The lattice expansion that occurs in Pd under higher H2 partial pressures is avoided. Once the flow of reagent gas is terminated, addition of metal salts facilitates controlled, electroless deposition of an overlayer of subnanometer thickness. This process can be cycled to create thicker layers. The approach is carried out under ambient processing conditions, which is an advantage over some forms of atomic layer deposition. The hydride-mediated reaction is electroless in that it has no need for connection to an external source of electrical current and is thus amenable to deposition on high-surface-area substrates having rich, nanoscale topography as well as on insulator-supported catalyst particles. STEM-EDS measurements show that conformal Rh and Pt surface layers can be formed on Pd powder with this method. A growth model based on energy-resolved XPS depth profiling of Rh-modified Pd powder is in general agreement. After two cycles, deposits are consistent with 70-80% coverage and a surface layer with a thickness from 4 to 8 Å. JF - Langmuir : the ACS journal of surfaces and colloids AU - Cappillino, Patrick J AU - Sugar, Joshua D AU - El Gabaly, Farid AU - Cai, Trevor Y AU - Liu, Zhi AU - Stickney, John L AU - Robinson, David B AD - Sandia National Laboratories, Livermore, California, United States. Y1 - 2014/04/29/ PY - 2014 DA - 2014 Apr 29 SP - 4820 EP - 4829 VL - 30 IS - 16 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520111301?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Langmuir+%3A+the+ACS+journal+of+surfaces+and+colloids&rft.atitle=Atomic-layer+electroless+deposition%3A+a+scalable+approach+to+surface-modified+metal+powders.&rft.au=Cappillino%2C+Patrick+J%3BSugar%2C+Joshua+D%3BEl+Gabaly%2C+Farid%3BCai%2C+Trevor+Y%3BLiu%2C+Zhi%3BStickney%2C+John+L%3BRobinson%2C+David+B&rft.aulast=Cappillino&rft.aufirst=Patrick&rft.date=2014-04-29&rft.volume=30&rft.issue=16&rft.spage=4820&rft.isbn=&rft.btitle=&rft.title=Langmuir+%3A+the+ACS+journal+of+surfaces+and+colloids&rft.issn=1520-5827&rft_id=info:doi/10.1021%2Fla500477s LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-04-15 N1 - Date created - 2014-04-29 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1021/la500477s ER - TY - JOUR T1 - Toward verifying fossil fuel CO sub(2) emissions with the CMAQ model: Motivation, model description and initial simulation AN - 1529949553; 19904468 AB - Motivated by the question of whether and how a state-of-the-art regional chemical transport model (CTM) can facilitate characterization of CO sub(2) spatiotemporal variability and verify CO sub(2) fossil-fuel emissions, we for the first time applied the Community Multiscale Air Quality (CMAQ) model to simulate CO sub(2). This paper presents methods, input data, and initial results for CO sub(2) simulation using CMAQ over the contiguous United States in October 2007. Modeling experiments have been performed to understand the roles of fossil-fuel emissions, biosphere-atmosphere exchange, and meteorology in regulating the spatial distribution of CO sub(2) near the surface over the contiguous United States. Three sets of net ecosystem exchange (NEE) fluxes were used as input to assess the impact of uncertainty of NEE on CO sub(2) concentrations simulated by CMAQ. Observational data from six tall tower sites across the country were used to evaluate model performance. In particular, at the Boulder Atmospheric Observatory (BAO), a tall tower site that receives urban emissions from Denver, CO, the CMAQ model using hourly varying, high-resolution CO sub(2) fossil-fuel emissions from the Vulcan inventory and CarbonTracker optimized NEE reproduced the observed diurnal profile of CO sub(2) reasonably well but with a low bias in the early morning. The spatial distribution of CO sub(2) was found to correlate with NOx, SO sub(2), and CO, because of their similar fossil-fuel emission sources and common transport processes. These initial results from CMAQ demonstrate the potential of using a regional CTM to help interpret CO sub(2) observations and understand CO sub(2) variability in space and time. The ability to simulate a full suite of air pollutants in CMAQ will also facilitate investigations of their use as tracers for CO sub(2) source attribution. This work serves as a proof of concept and the foundation for more comprehensive examinations of CO sub(2) spatiotemporal variability and various uncertainties in the future. JF - Journal of the Air & Waste Management Association AU - Liu, Zhen AU - Bambha, Ray P AU - Pinto, Joseph P AU - Zeng, Tao AU - Boylan, Jim AU - Huang, Maoyi AU - Lei, Huimin AU - Zhao, Chun AU - Liu, Shishi AU - Mao, Jiafu AU - Schwalm, Christopher R AU - Shi, Xiaoying AU - Wei, Yaxing AU - Michelsen, Hope A AD - Combustion Research Facility, Sandia National Laboratories, Livermore, CA, USA Y1 - 2014/04/03/ PY - 2014 DA - 2014 Apr 03 SP - 419 EP - 435 PB - Taylor & Francis Group Ltd., 2 Park Square Oxford OX14 4RN United Kingdom VL - 64 IS - 4 SN - 1096-2247, 1096-2247 KW - Environment Abstracts; Pollution Abstracts KW - Diurnal variations KW - Spatial distribution KW - Fossil fuels KW - Chemical transport KW - Simulation KW - Air quality KW - Air pollution KW - Tracers KW - USA KW - Sulfur dioxide KW - USA, Colorado, Denver KW - Emissions KW - Meteorology KW - Transport processes KW - Carbon dioxide KW - P 0000:AIR POLLUTION KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529949553?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+Air+%26+Waste+Management+Association&rft.atitle=Toward+verifying+fossil+fuel+CO+sub%282%29+emissions+with+the+CMAQ+model%3A+Motivation%2C+model+description+and+initial+simulation&rft.au=Liu%2C+Zhen%3BBambha%2C+Ray+P%3BPinto%2C+Joseph+P%3BZeng%2C+Tao%3BBoylan%2C+Jim%3BHuang%2C+Maoyi%3BLei%2C+Huimin%3BZhao%2C+Chun%3BLiu%2C+Shishi%3BMao%2C+Jiafu%3BSchwalm%2C+Christopher+R%3BShi%2C+Xiaoying%3BWei%2C+Yaxing%3BMichelsen%2C+Hope+A&rft.aulast=Liu&rft.aufirst=Zhen&rft.date=2014-04-03&rft.volume=64&rft.issue=4&rft.spage=419&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+Air+%26+Waste+Management+Association&rft.issn=10962247&rft_id=info:doi/10.1080%2F10962247.2013.816642 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Diurnal variations; Fossil fuels; Spatial distribution; Chemical transport; Simulation; Air quality; Air pollution; Tracers; Sulfur dioxide; Emissions; Meteorology; Transport processes; Carbon dioxide; USA; USA, Colorado, Denver DO - http://dx.doi.org/10.1080/10962247.2013.816642 ER - TY - JOUR T1 - Drying Effect Creates False Assemblies in DNA-Coated Gold Nanoparticles as Determined Through In Situ Liquid Cell STEM AN - 1846408637; PQ0003835947 AB - The drying effect associated with utilizing transmission electron microscopy to study deoxyribonucleic acid (DNA)-coated gold nanoparticles (AuNPs) remains largely uninvestigated, though this technique is frequently utilized to characterize nanoparticle-DNA interactions. Investigation of the drying effect is essential to the progress of the many fields that utilize AuNPs, including cancer research. In this study, we compare DNA hybridization-directed nanoparticle assemblies with control samples omitting the necessary complementary DNA, effectively blocking directed assembly, in both the liquid state and the dry state, within a scanning transmission electron microscope. We show that the dry samples contain AuNPs spaced at significantly smaller intervals than identical samples measured in situ, with no dependence on the DNA bound to the AuNPs in the dry samples. A partially wet sample, with distances measured along the drying edge, provided an intermediate binding distance, strengthening the conclusion that drastic differences observed between the dry and in situ samples are due to a pronounced drying effect. This drying effect will falsely indicate certain grouping arrangements and will change the impression of the size of the groups formed, providing misinformation for the development of these controlled assemblies that could impact applications such as targeted drug vehicles for cancer treatment. JF - Microscopy and Microanalysis AU - Rudolph, Angela R AU - Jungjohann, Katherine L AU - Wheeler, David R AU - Brozik, Susan M AD - Department of Chemistry, Washington State University, Pullman, WA 99164-4630, USA, kljungj@sandia.gov Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 437 EP - 444 PB - Cambridge University Press, The Edinburgh Building, Cambridge CB2 2RU United Kingdom VL - 20 IS - 2 SN - 1431-9276, 1431-9276 KW - Biochemistry Abstracts 2: Nucleic Acids; Biotechnology and Bioengineering Abstracts KW - Microscopes KW - Transmission electron microscopy KW - Acids KW - DNA KW - Drying KW - Gold KW - Drug development KW - Intermediates KW - nanoparticles KW - Cancer KW - N 14845:Miscellaneous KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1846408637?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Microscopy+and+Microanalysis&rft.atitle=Drying+Effect+Creates+False+Assemblies+in+DNA-Coated+Gold+Nanoparticles+as+Determined+Through+In+Situ+Liquid+Cell+STEM&rft.au=Rudolph%2C+Angela+R%3BJungjohann%2C+Katherine+L%3BWheeler%2C+David+R%3BBrozik%2C+Susan+M&rft.aulast=Rudolph&rft.aufirst=Angela&rft.date=2014-04-01&rft.volume=20&rft.issue=2&rft.spage=437&rft.isbn=&rft.btitle=&rft.title=Microscopy+and+Microanalysis&rft.issn=14319276&rft_id=info:doi/10.1017%2FS143192761400018X LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-12-01 N1 - Number of references - 26 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Acids; Transmission electron microscopy; Microscopes; DNA; Gold; Drying; Drug development; Intermediates; nanoparticles; Cancer DO - http://dx.doi.org/10.1017/S143192761400018X ER - TY - JOUR T1 - Theory of transient streaming potentials in coupled unconfined aquifer-unsaturated zone flow to a well AN - 1560083193; 2014-069129 AB - A semianalytical solution is presented for transient streaming potentials associated with flow to a pumping well in an unconfined aquifer, taking into account the effect of flow in the unsaturated zone above the water table. Flow in the unsaturated zone is modeled with a linearized form of Richards' equation using an exponential model for soil moisture retention and unsaturated hydraulic conductivity. Archie's law is invoked for unsaturated electrical conductivity. The unsaturated electrokinetic coupling coefficient is modeled with a decaying exponential, where the maximum value is at and below the water table. The coupled flow and electrokinetic problem is solved using Laplace and Hankel transforms. The results of the model predicted behavior are presented and compared to that observed in laboratory simulations of pumping tests. The early time polarity reversal predicted the model is observable in the experiments. Other nonmonotonic streaming potential behaviors predicted by the model are also evident in experimental measurements. The model is used to estimate hydraulic parameters from SP data and these compare well to those obtained from drawdown data. For example, a hydraulic conductivity of 3.6 X 10 (super -4) m/s is obtained from SP data compared to 3.4 X 10 (super -4) m/s from drawdown data. Abstract Copyright (2014), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Malama, Bwalya Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 2921 EP - 2945 PB - American Geophysical Union, Washington, DC VL - 50 IS - 4 SN - 0043-1397, 0043-1397 KW - experimental studies KW - Hankel transformations KW - numerical analysis KW - Archie's law KW - pumping KW - unsaturated zone KW - equations KW - simulation KW - Laplace transformations KW - ground water KW - aquifers KW - laboratory studies KW - theoretical studies KW - transient phenomena KW - transport KW - Richards equation KW - hydraulic conductivity KW - water wells KW - unconfined aquifers KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560083193?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Theory+of+transient+streaming+potentials+in+coupled+unconfined+aquifer-unsaturated+zone+flow+to+a+well&rft.au=Malama%2C+Bwalya&rft.aulast=Malama&rft.aufirst=Bwalya&rft.date=2014-04-01&rft.volume=50&rft.issue=4&rft.spage=2921&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR014909 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 48 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-11-13 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - aquifers; Archie's law; equations; experimental studies; ground water; Hankel transformations; hydraulic conductivity; laboratory studies; Laplace transformations; numerical analysis; pumping; Richards equation; simulation; theoretical studies; transient phenomena; transport; unconfined aquifers; unsaturated zone; water wells DO - http://dx.doi.org/10.1002/2013WR014909 ER - TY - JOUR T1 - Development of a used fuel cladding damage model incorporating circumferential and radial hydride responses AN - 1554954386; 20219537 AB - At the completion of the fuel drying process, used fuel Zry4 cladding typically exhibits a significant population of delta -hydride inclusions. A high fidelity model of the mechanical behavior of hydrides has utility in both designing fuel cladding to be more resistant to this hydride-induced weakening and also in suggesting modifications to drying, storage, and transport operations to reduce the impact of hydride formation and/or the avoidance of loading scenarios that could overly stress the radial inclusions. The model is hosted by the Albany analysis framework, where a finite element approximation of the weak form of the cladding boundary value problem is solved using a preconditioned Newton-Krylov approach. We present results that describe the performance of the model in comparison with as-fabricated Zry4 as well as HB Robinson fuel cladding. Further, we also present performance results that demonstrate the efficacy of the overall solution method employed to host the model. JF - Journal of Nuclear Materials AU - Chen, Qiushi AU - Ostien, Jakob T AU - Hansen, Glen AD - Glenn Department of Civil Engineering, Clemson University, Clemson, SC 29634, USA, gahanse@sandia.gov Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 292 EP - 303 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 447 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Storage KW - Fuels KW - Nuclear fuels KW - Boundary value problems KW - Radioactive materials KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1554954386?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Development+of+a+used+fuel+cladding+damage+model+incorporating+circumferential+and+radial+hydride+responses&rft.au=Chen%2C+Qiushi%3BOstien%2C+Jakob+T%3BHansen%2C+Glen&rft.aulast=Chen&rft.aufirst=Qiushi&rft.date=2014-04-01&rft.volume=447&rft.issue=1-3&rft.spage=292&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2014.01.001 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-01 N1 - Number of references - 36 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Storage; Fuels; Radioactive materials; Boundary value problems; Nuclear fuels DO - http://dx.doi.org/10.1016/j.jnucmat.2014.01.001 ER - TY - JOUR T1 - Probability of loss of assured safety in systems with multiple time-dependent failure modes: Representations with aleatory and epistemic uncertainty AN - 1534811797; 19900883 AB - Weak link (WL)/strong link (SL) systems are important parts of the overall operational design of high-consequence systems. In such designs, the SL system is very robust and is intended to permit operation of the entire system under, and only under, intended conditions. In contrast, the WL system is intended to fail in a predictable and irreversible manner under accident conditions and render the entire system inoperable before an accidental operation of the SL system. The likelihood that the WL system will fail to deactivate the entire system before the SL system fails (i.e., degrades into a configuration that could allow an accidental operation of the entire system) is referred to as probability of loss of assured safety (PLOAS). Representations for PLOAS for situations in which both link physical properties and link failure properties are time-dependent are derived and numerically evaluated for a variety of WL/SL configurations, including PLOAS defined by (i) failure of all SLs before failure of any WL, (ii) failure of any SL before failure of any WL, (iii) failure of all SLs before failure of all WLs, and (iv) failure of any SL before failure of all WLs. The indicated formal representations and associated numerical procedures for the evaluation of PLOAS are illustrated with example analyses involving (i) only aleatory uncertainty, (ii) aleatory uncertainty and epistemic uncertainty, and (iii) mixtures of aleatory uncertainty and epistemic uncertainty. JF - Reliability Engineering & System Safety AU - Helton, Jon C AU - Pilch, Martin AU - Sallaberry, Cedric J AD - Department of Mathematics and Statistics, Arizona State University, Tempe, AZ 85287-1804, USA, jchelto@sandia.gov Y1 - 2014/04// PY - 2014 DA - Apr 2014 SP - 171 EP - 200 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 124 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - Aleatory uncertainty KW - Epistemic uncertainty KW - Probability of loss of assured safety KW - Strong link KW - Uncertainty analysis KW - Weak link KW - Accidents KW - Safety engineering KW - H 0500:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1534811797?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Probability+of+loss+of+assured+safety+in+systems+with+multiple+time-dependent+failure+modes%3A+Representations+with+aleatory+and+epistemic+uncertainty&rft.au=Helton%2C+Jon+C%3BPilch%2C+Martin%3BSallaberry%2C+Cedric+J&rft.aulast=Helton&rft.aufirst=Jon&rft.date=2014-04-01&rft.volume=124&rft.issue=&rft.spage=171&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/10.1016%2Fj.ress.2013.11.012 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-06-01 N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - Accidents; Safety engineering DO - http://dx.doi.org/10.1016/j.ress.2013.11.012 ER - TY - JOUR T1 - Understanding pretreatment efficacy of four cholinium and imidazolium ionic liquids by chemistry and computation AN - 1524415174; 19761727 AB - Certain ionic liquids (ILs) offer a potentially more sustainable and environmentally responsible alternative to organic solvents for many industrial applications, including biorefineries, where they are used to pretreat lignocellulose. To gain a more robust understanding of the roles of cations and anions in the process, we monitored the impact of the respective ILs on Panicum virgatum(switchgrass) in terms of lignin content, cellulose crystallinity, and enzymatic digestibility. The behaviors of four ILs, based on one of two cations, 1-ethyl-3-methylimidazolium ([C sub(2)mim] super(+)) and cholinium ([Ch] super(+)), and one of two anions, acetate ([OAc] super(-)) and lysinate ([Lys] super(-)), were compared. While all four ILs were effective in pretreating switchgrass, ILs containing [Lys] super(-) anions provided greater delignification (70-80% vs.16-50%) after addition of water as an anti-solvent and higher glucose yields (78-96% vs.56-90%) compared to those obtained by the use of ILs containing [OAc] super(-) anions. Measurements of the Kamlet-Taft parameters using a series of dyes indicated a greater hydrogen bond basicity for the ILs with [Lys] super(-) anions as compared to acetate ILs. To understand the effective delignification ability of lysinate-based ILs, interaction energies of individual ions and ion pairs with a model dilignol substrate were determined by quantum chemical calculations. The results show that the addition of antisolvent significantly influenced the interaction energies governing lignin removal during the process. JF - Green Chemistry AU - Sun, Ning AU - Parthasarathi, Ramakrishnan AU - Socha, Aaron M AU - Shi, Jian AU - Zhang, Sonny AU - Stavila, Vitalie AU - Sale, Kenneth L AU - Simmons, Blake A AU - Singh, Seema AD - Deconstruction Division; Joint BioEnergy Institute; Emeryville; CA; USA; +1-925-294-4551; , seesing@sandia.gov Y1 - 2014/04// PY - 2014 DA - April 2014 SP - 2546 EP - 2557 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 16 IS - 5 SN - 1463-9262, 1463-9262 KW - Sustainability Science Abstracts KW - Ions KW - Anions KW - Cellulose KW - Glucose KW - Solvents KW - Sustainable development KW - Hydrogen KW - Panicum KW - Cations KW - Dyes KW - Energy KW - Green development KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524415174?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Green+Chemistry&rft.atitle=Understanding+pretreatment+efficacy+of+four+cholinium+and+imidazolium+ionic+liquids+by+chemistry+and+computation&rft.au=Sun%2C+Ning%3BParthasarathi%2C+Ramakrishnan%3BSocha%2C+Aaron+M%3BShi%2C+Jian%3BZhang%2C+Sonny%3BStavila%2C+Vitalie%3BSale%2C+Kenneth+L%3BSimmons%2C+Blake+A%3BSingh%2C+Seema&rft.aulast=Sun&rft.aufirst=Ning&rft.date=2014-04-01&rft.volume=16&rft.issue=5&rft.spage=2546&rft.isbn=&rft.btitle=&rft.title=Green+Chemistry&rft.issn=14639262&rft_id=info:doi/10.1039%2Fc3gc42401d LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Number of references - 41 N1 - Last updated - 2016-08-03 N1 - SubjectsTermNotLitGenreText - Ions; Anions; Dyes; Cations; Energy; Cellulose; Green development; Solvents; Glucose; Sustainable development; Hydrogen; Panicum DO - http://dx.doi.org/10.1039/c3gc42401d ER - TY - JOUR T1 - Salt, shake, fuse--giant hybrid polymer/lipid vesicles through mechanically activated fusion. AN - 1509410096; 24554375 AB - Large (200 nm) poly(ethylene oxide)-b-poly(butadiene) polymer vesicles fuse into giant (>1 μm) vesicles with mild agitation in dilute aqueous NaCl solutions. This unusual effect is attributed to the salt-induced contraction of the poly(ethylene oxide) corona, reducing steric resistance between vesicles and, with agitation, increasing the probability of contact between the hydrophobic cores of adjacent membranes. In addition, NaCl and agitation facilitated the creation of giant hybrid vesicles from much smaller homogeneous polymersomes and liposomes. Whereas lipid vesicles do not readily fuse with each other under the same circumstances, they did fuse with polymersomes to produce hybrid polymer/lipid vesicles. JF - Angewandte Chemie (International ed. in English) AU - Henderson, Ian M AU - Paxton, Walter F AD - Center for integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, NM 87185 (USA). Y1 - 2014/03/24/ PY - 2014 DA - 2014 Mar 24 SP - 3372 EP - 3376 VL - 53 IS - 13 KW - Lipids KW - 0 KW - Liposomes KW - Polymers KW - Index Medicus KW - liposomes KW - particle fusion KW - polymersomes KW - vesicles KW - nanostructures KW - Nanostructures KW - Lipids -- chemistry KW - Polymers -- chemistry KW - Liposomes -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1509410096?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Angewandte+Chemie+%28International+ed.+in+English%29&rft.atitle=Salt%2C+shake%2C+fuse--giant+hybrid+polymer%2Flipid+vesicles+through+mechanically+activated+fusion.&rft.au=Henderson%2C+Ian+M%3BPaxton%2C+Walter+F&rft.aulast=Henderson&rft.aufirst=Ian&rft.date=2014-03-24&rft.volume=53&rft.issue=13&rft.spage=3372&rft.isbn=&rft.btitle=&rft.title=Angewandte+Chemie+%28International+ed.+in+English%29&rft.issn=1521-3773&rft_id=info:doi/10.1002%2Fanie.201309433 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-01-12 N1 - Date created - 2014-03-20 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1002/anie.201309433 ER - TY - CPAPER T1 - Corrosion Performance of Ceragenin Modified Coatings T2 - 2014 International Annual Conference and Exposition of National Association of Corrosion Engineering (CORROSION 2014) AN - 1518615478; 6286893 JF - 2014 International Annual Conference and Exposition of National Association of Corrosion Engineering (CORROSION 2014) AU - Enos, David Y1 - 2014/03/09/ PY - 2014 DA - 2014 Mar 09 KW - Coating materials KW - Corrosion UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1518615478?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+International+Annual+Conference+and+Exposition+of+National+Association+of+Corrosion+Engineering+%28CORROSION+2014%29&rft.atitle=Corrosion+Performance+of+Ceragenin+Modified+Coatings&rft.au=Enos%2C+David&rft.aulast=Enos&rft.aufirst=David&rft.date=2014-03-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+International+Annual+Conference+and+Exposition+of+National+Association+of+Corrosion+Engineering+%28CORROSION+2014%29&rft.issn=&rft_id=info:doi/ L2 - http://events.nace.org/conferences/C2014/images_welcome/C2014FinalProgram.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-23 N1 - Last updated - 2014-04-24 ER - TY - JOUR T1 - Development of seismic field system for multi-year deployment at Poker Flat Research Range, Alaska AN - 1819898242; 2015-120467 JF - Seismological Research Letters AU - Hart, D AU - Abbott, R E AU - Freymueller, Jeff T AU - Haeussler, Peter J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 441 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - technology KW - Poker Flat Research Range KW - geophysical methods KW - Alaska KW - instruments KW - seismic methods KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1819898242?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Development+of+seismic+field+system+for+multi-year+deployment+at+Poker+Flat+Research+Range%2C+Alaska&rft.au=Hart%2C+D%3BAbbott%2C+R+E%3BFreymueller%2C+Jeff+T%3BHaeussler%2C+Peter+J&rft.aulast=Hart&rft.aufirst=D&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=441&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - Alaska; geophysical methods; instruments; Poker Flat Research Range; seismic methods; technology; United States ER - TY - JOUR T1 - Comparing modeled and observed infrasound signals form the Source Physics Experiment tests 2 and 3 AN - 1756506794; 2015-120507 JF - Seismological Research Letters AU - Jones, K R AU - Whitaker, R W AU - Arrowsmith, S J Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 449 EP - 450 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - models KW - experimental studies KW - seismicity KW - explosions KW - chemical explosions KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506794?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Comparing+modeled+and+observed+infrasound+signals+form+the+Source+Physics+Experiment+tests+2+and+3&rft.au=Jones%2C+K+R%3BWhitaker%2C+R+W%3BArrowsmith%2C+S+J&rft.aulast=Jones&rft.aufirst=K&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=449&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - chemical explosions; experimental studies; explosions; models; seismicity ER - TY - JOUR T1 - Recovering seismic Green's functions using icequake coda interferometry at Erebus Volcano, Antarctica AN - 1756506337; 2015-120501 JF - Seismological Research Letters AU - McMahon, Nicole D AU - Chaput, J A AU - Knox, H A AU - Aster, R C AU - Kyle, P R Y1 - 2014/03// PY - 2014 DA - March 2014 SP - 448 PB - Seismological Society of America, El Cerrito, CA VL - 85 IS - 2 SN - 0895-0695, 0895-0695 KW - monitoring KW - guided waves KW - icequakes KW - coda waves KW - Green function KW - elastic waves KW - interferometry KW - surface waves KW - Antarctica KW - seismicity KW - seismic waves KW - Mount Erebus KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756506337?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Recovering+seismic+Green%27s+functions+using+icequake+coda+interferometry+at+Erebus+Volcano%2C+Antarctica&rft.au=McMahon%2C+Nicole+D%3BChaput%2C+J+A%3BKnox%2C+H+A%3BAster%2C+R+C%3BKyle%2C+P+R&rft.aulast=McMahon&rft.aufirst=Nicole&rft.date=2014-03-01&rft.volume=85&rft.issue=2&rft.spage=448&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - SSA 2014 annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - PubXState - CA N1 - Last updated - 2016-10-25 N1 - SubjectsTermNotLitGenreText - Antarctica; coda waves; elastic waves; Green function; guided waves; icequakes; interferometry; monitoring; Mount Erebus; seismic waves; seismicity; surface waves ER - TY - JOUR T1 - Adsorption and capillary condensation in porous media as a function of the chemical potential of water in carbon dioxide AN - 1529945255; 19822404 AB - The chemical potential of water may play an important role in adsorption and capillary condensation of water under multiphase conditions at geologic CO sub(2) storage sites. Injection of large volumes of anhydrous CO sub(2) will result in changing values of the chemical potential of water in the supercritical CO sub(2) phase. We hypothesize that the chemical potential will at first reflect the low concentration of dissolved water in the dry CO sub(2). As formation water dissolves into and is transported by the CO sub(2) phase, the chemical potential of water will increase. We present a pore-scale model of the CO sub(2)-water interface or menisci configuration based on the augmented Young-Laplace equation, which combines adsorption on flat surfaces and capillary condensation in wedge-shaped pores as a function of chemical potential of water. The results suggest that, at a given chemical potential for triangular and square pores, liquid water saturation will be less in the CO sub(2)-water system under potential CO sub(2) sequestration conditions relative to the air-water vadose zone system. The difference derives from lower surface tension of the CO sub(2)-water system and thinner liquid water films, important at pore sizes <1 10 super(-6) m, relative to the air-water system. Water movement due to capillary effects will likely be minimal in reservoir rocks, but still may be important in finer grained, clayey caprocks, where very small pores may retain water and draw water back into the system via adsorption and capillary condensation, if dry-out and then rewetting were to occur. Key Points * We present water adsorption and capillary condensation for the carbon dioxide-water system * Less water pore saturation for carbon dioxide storage sites than vadose zone * Reservoir rocks require relatively high water activities for imbibition snap-off JF - Water Resources Research AU - Heath, Jason E AU - Bryan, Charles R AU - Matteo, Edward N AU - Dewers, Thomas A AU - Wang, Yifeng AU - Sallaberry, Cedric J AD - Department of Geomechanics Sandia National, Laboratories Albuquerque, New Mexico, USA. Y1 - 2014/03// PY - 2014 DA - Mar 2014 SP - 2718 EP - 2731 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 50 IS - 3 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - chemical potential of water KW - supercritical CO sub(2) KW - augmented Young-Laplace equation KW - water film KW - partial saturation KW - Reservoir KW - Water resources KW - Chemical Potential KW - Vadose Water KW - Reservoirs KW - Water motion KW - Mathematical models KW - Surface tension KW - Biogeochemical cycle KW - Vadose waters KW - Carbon cycle KW - Saturation KW - Air-water interface KW - Storage KW - Pores KW - Adsorption KW - Condensation KW - Carbon sinks KW - Water resources research KW - Carbon dioxide KW - Carbon Dioxide KW - SW 5010:Network design KW - AQ 00006:Sewage KW - Q2 09272:Petrology and chemistry of rocks KW - M2 556.18:Water Management (556.18) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529945255?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Adsorption+and+capillary+condensation+in+porous+media+as+a+function+of+the+chemical+potential+of+water+in+carbon+dioxide&rft.au=Heath%2C+Jason+E%3BBryan%2C+Charles+R%3BMatteo%2C+Edward+N%3BDewers%2C+Thomas+A%3BWang%2C+Yifeng%3BSallaberry%2C+Cedric+J&rft.aulast=Heath&rft.aufirst=Jason&rft.date=2014-03-01&rft.volume=50&rft.issue=3&rft.spage=2718&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR013728 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2014-12-11 N1 - SubjectsTermNotLitGenreText - Water motion; Reservoir; Surface tension; Mathematical models; Biogeochemical cycle; Carbon cycle; Water resources; Carbon dioxide; Air-water interface; Vadose waters; Condensation; Water resources research; Carbon sinks; Reservoirs; Storage; Pores; Adsorption; Chemical Potential; Saturation; Vadose Water; Carbon Dioxide DO - http://dx.doi.org/10.1002/2013WR013728 ER - TY - JOUR T1 - Biomolecular motors in nanoscale materials, devices, and systems. AN - 1499140751; 24523280 AB - Biomolecular motors are a unique class of intracellular proteins that are fundamental to a considerable number of physiological functions such as DNA replication, organelle trafficking, and cell division. The efficient transformation of chemical energy into useful work by these proteins provides strong motivation for their utilization as nanoscale actuators in ex vivo, meso- and macro-scale hybrid systems. Biomolecular motors involved in cytoskeletal transport are quite attractive models within this context due to their ability to direct the transport of nano-/micro-scale objects at rates significantly greater than diffusion, and in the absence of bulk fluid flow. As in living organisms, biomolecular motors involved in cytoskeletal transport (i.e., kinesin, dynein, and myosin) function outside of their native environment to dissipatively self-assemble biological, biomimetic, and hybrid nanostructures that exhibit nonequilibrium behaviors such as self-healing. These systems also provide nanofluidic transport function in hybrid nanodevices where target analytes are actively captured, sorted, and transported for autonomous sensing and analytical applications. Moving forward, the implementation of biomolecular motors will continue to enable a wide range of unique functionalities that are presently limited to living systems, and support the development of nanoscale systems for addressing critical engineering challenges. JF - Wiley interdisciplinary reviews. Nanomedicine and nanobiotechnology AU - Bachand, George D AU - Bouxsein, Nathan F AU - VanDelinder, Virginia AU - Bachand, Marlene AD - Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, NM, USA. PY - 2014 SP - 163 EP - 177 VL - 6 IS - 2 KW - Index Medicus KW - Cytoskeleton KW - Biological Transport KW - Biomimetics KW - Models, Biological KW - Biomimetic Materials KW - Nanotechnology KW - Nanostructures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1499140751?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wiley+interdisciplinary+reviews.+Nanomedicine+and+nanobiotechnology&rft.atitle=Biomolecular+motors+in+nanoscale+materials%2C+devices%2C+and+systems.&rft.au=Bachand%2C+George+D%3BBouxsein%2C+Nathan+F%3BVanDelinder%2C+Virginia%3BBachand%2C+Marlene&rft.aulast=Bachand&rft.aufirst=George&rft.date=2014-03-01&rft.volume=6&rft.issue=2&rft.spage=163&rft.isbn=&rft.btitle=&rft.title=Wiley+interdisciplinary+reviews.+Nanomedicine+and+nanobiotechnology&rft.issn=1939-0041&rft_id=info:doi/10.1002%2Fwnan.1252 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2014-09-15 N1 - Date created - 2014-02-13 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1002/wnan.1252 ER - TY - CPAPER T1 - Mitigating the Chemical, Biological, and Radiological Threat T2 - 2014 Annual Meeting of the American Association for the Advancement of Science (AAAS 2014) AN - 1510095747; 6280152 JF - 2014 Annual Meeting of the American Association for the Advancement of Science (AAAS 2014) AU - Hruby, Jill Y1 - 2014/02/13/ PY - 2014 DA - 2014 Feb 13 KW - Mitigation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510095747?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2014+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2014%29&rft.atitle=Mitigating+the+Chemical%2C+Biological%2C+and+Radiological+Threat&rft.au=Hruby%2C+Jill&rft.aulast=Hruby&rft.aufirst=Jill&rft.date=2014-02-13&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2014+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2014%29&rft.issn=&rft_id=info:doi/ L2 - https://aaas.confex.com/aaas/2014/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-03-24 N1 - Last updated - 2014-03-26 ER - TY - JOUR T1 - Quantifying sediment mobilization risk resulting from WEC array installation AN - 1803773720; 2016-059624 JF - Ocean Sciences Meeting AU - Magalen, J M AU - Jones, C A AU - Roberts, J D AU - Chang, G AU - Sharp, Jonathan AU - Briscoe, Mel AU - Itsweire, Eric Y1 - 2014/02// PY - 2014 DA - February 2014 EP - Abstract 17342 PB - American Geophysical Union (AGU), [varies] VL - 17 KW - ocean circulation KW - patterns KW - numerical models KW - sediment transport KW - shear stress KW - nearshore environment KW - simulation KW - models KW - transport KW - quantitative analysis KW - sediments KW - mobilization KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1803773720?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ocean+Sciences+Meeting&rft.atitle=Quantifying+sediment+mobilization+risk+resulting+from+WEC+array+installation&rft.au=Magalen%2C+J+M%3BJones%2C+C+A%3BRoberts%2C+J+D%3BChang%2C+G%3BSharp%2C+Jonathan%3BBriscoe%2C+Mel%3BItsweire%2C+Eric&rft.aulast=Magalen&rft.aufirst=J&rft.date=2014-02-01&rft.volume=17&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Ocean+Sciences+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 2014 ocean sciences meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Last updated - 2016-07-14 N1 - CODEN - #07653 N1 - SubjectsTermNotLitGenreText - mobilization; models; nearshore environment; numerical models; ocean circulation; patterns; quantitative analysis; sediment transport; sediments; shear stress; simulation; transport ER - TY - JOUR T1 - Pore-scale multiphase flow experiments in bead packs of variable wettability AN - 1756507814; 2016-004201 AB - The aim of this experimental study is to investigate the impact of wetting characteristics on multiphase flow, sweep efficiency, and residual fluid distribution in unconsolidated porous media. A sequence of oil and water injections was performed on bead packs with uniform porosity and permeability, but different wettability characteristics. Uniform and mixed-wet bead packs with varying degree of wettability were fabricated to analyze how the residual saturation profiles and the distribution of fluid phases at the pore scale respond to changes in wettability. X-ray microtomography was used to visualize and analyze the fluid distribution in each bead pack at the end of oil and brine injection. It was found that sweep efficiency was high for the uniform, strongly wetting glass bead pack. For the intermediate-wet plastic bead pack, we observed evidence of viscous fingering resulting in degenerating sweep efficiency after water injection. In media with mixed wetting surfaces, the spatial distribution of wettability influenced the topology of the saturation profiles and resulted in larger quantities of disconnected fluid blobs. Results also showed that the average blob size was independent of the average residual saturation. In addition, the difference in saturation conditions preceding each injection affected sweep efficiency. The residual saturation after the 1st displacement was higher than the residual saturation after the 2nd displacement. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - Geofluids (Oxford) AU - Celauro, J G AU - Torrealba, V A AU - Karpyn, Z T AU - Klise, K A AU - McKenna, S A Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 95 EP - 105 PB - Wiley-Blackwell, Oxford VL - 14 IS - 1 SN - 1468-8115, 1468-8115 KW - water KW - tomography KW - experimental studies KW - porous materials KW - petroleum KW - fluid phase KW - porosity KW - reservoir rocks KW - geometry KW - spatial distribution KW - laboratory studies KW - fluid injection KW - X-ray data KW - computed tomography KW - saturation KW - brines KW - volume KW - multiphase flow KW - wettability KW - topology KW - reservoir properties KW - unconsolidated materials KW - permeability KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756507814?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geofluids+%28Oxford%29&rft.atitle=Pore-scale+multiphase+flow+experiments+in+bead+packs+of+variable+wettability&rft.au=Celauro%2C+J+G%3BTorrealba%2C+V+A%3BKarpyn%2C+Z+T%3BKlise%2C+K+A%3BMcKenna%2C+S+A&rft.aulast=Celauro&rft.aufirst=J&rft.date=2014-02-01&rft.volume=14&rft.issue=1&rft.spage=95&rft.isbn=&rft.btitle=&rft.title=Geofluids+%28Oxford%29&rft.issn=14688115&rft_id=info:doi/10.1111%2Fgfl.12045 L2 - http://www.blackwellpublishing.com/journal.asp?ref=1468-8115 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2016-01-01 N1 - Number of references - 28 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-01-14 N1 - SubjectsTermNotLitGenreText - brines; computed tomography; experimental studies; fluid injection; fluid phase; geometry; laboratory studies; multiphase flow; permeability; petroleum; porosity; porous materials; reservoir properties; reservoir rocks; saturation; spatial distribution; tomography; topology; unconsolidated materials; volume; water; wettability; X-ray data DO - http://dx.doi.org/10.1111/gfl.12045 ER - TY - JOUR T1 - Transport modeling in performance assessments for the Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste AN - 1709791590; 18903724 AB - This paper summarizes modeling of radionudide transport in the unsaturated and saturated zone conducted between 1984 and 2008 to evaluate feasibility, viability, and assess compliance of a repository for spent nuclear fuel and high-level radioactive waste at Yucca Mountain, Nevada. One dimensional (1-D) transport for a single porosity media without lateral dispersion was solved in both the saturated zone (SZ) and unsaturated zone (UZ) for the first assessment in 1984 but progressed to a dual-porosity formulation for the UZ in the second assessment in 1991. By the time of the viability assessment, a dual-permeability transport formulation was used in the UZ. With the planned switch to a dose performance measure, individual dose from a drinking water pathway was evaluated for the third assessment in 1993 and from numerous pathways for the viability assessment in 1998 and thereafter. Stream tubes for transport in the SZ were initially developed manually but progressed to particle tracking in 1991. For the viability assessment, particle tracking was used to solve the transport equations in the 3-D UZ and SZ flow fields. To facilitate calculations, the convolution method was also used in the SZ for the viability assessment. For the site recommendation in 2001 and licensing compliance analysis in 2008, the 3-D transport results of the SZ were combined with 1-D transport results, which evaluated decay of radionuclides, in order to evaluate compliance with groundwater protection requirements. Uncertainty in flow within the unsaturated and saturated zone was generally important to explaining the spread in the individual dose performance measure. JF - Reliability Engineering & System Safety AU - Rechard, R P AU - Arnold, B W AU - Robinson, BA AU - Houseworth, JE AD - Nuclear Waste Disposal Research & Analysis, P.O. Box 5800, Sandia National Laboratories, Albuquerque, NM 87185-0747, USA rprecha@sandia.gov Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 189 EP - 206 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Radioactive waste KW - Mountains KW - Mathematical models KW - Assessments KW - Transport KW - Spent nuclear fuels KW - Nuclear waste disposal KW - Viability UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1709791590?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Transport+modeling+in+performance+assessments+for+the+Yucca+Mountain+disposal+system+for+spent+nuclear+fuel+and+high-level+radioactive+waste&rft.au=Rechard%2C+R+P%3BArnold%2C+B+W%3BRobinson%2C+BA%3BHouseworth%2C+JE&rft.aulast=Rechard&rft.aufirst=R&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=189&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2017-02-03 ER - TY - JOUR T1 - Results from past performance assessments for the Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste AN - 1494362871; 18903725 AB - This paper summarizes the progression of results through four early performance assessments (PAs) conducted to support selection and to evaluate feasibility and three major PAs conducted to evaluate viability, recommend the site, and assess compliance of a repository for spent nuclear fuel and high-level radioactive waste at Yucca Mountain, Nevada. The early PAs in 1984, 1991, 1993, and 1995 evaluated cumulative release over 10 super(4) yr at a 10-km or 5-km boundary as specified in the draft and final 1985 radiation protection standard, respectively. During the early PAs, the fission products super(99)Tc, super(129)I, and activation products super(14)C, and super(36)C1 were identified as important radionuclides at the beginning of the regulatory period. The actinide, super(237)Np, often dominated at the end of the regulatory period. Package and repository design options were evaluated during the early PAs but modeling did not identify strong preferences. In 1992 Congress mandated a change to a dose measure. Dose at a 20-km boundary from the repository was evaluated through 10 super(6) yr for the undisturbed scenario class via the groundwater pathway for the Congressionally mandated viability assessment in 1998. For the assessment for the site recommendation in 2000, doses from igneous eruption dominated in the first similar to 3000 yr, doses from igneous intrusion between similar to 3000 yr and similar to 40,000 yr, and doses from the undisturbed scenario class through 10 super(6) yr. The 2008 compliance assessment for the license application incorporated the influence of the seismic scenario class on waste package performance. The compliance assessment found that doses from the igneous intrusive scenario class and the combined undisturbed and seismic scenario class were important contributors at the similar to 18-km boundary. In the compliance PA, super(14)Tc and super(129)I fission products and super(14)C activation product were important in the first 10 super(4) yr. Beyond 10 super(4) yr, actinides super(239)Pu, super(242)Pu, super(237)Np, and super(238)U decay product super(226)Ra were important In all PAs, parameters of the natural barrier were important, but in the three latter PAs, the slow degradation of the large, in-drift container had an important role in explaining the uncertainty in the peak dose. JF - Reliability Engineering & System Safety AU - Rechard, R P AD - Nuclear Waste Disposal Research & Analysis, Sandia National Laboratories, Albuquerque, NM 87185-0747, USA rprecha@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 207 EP - 222 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Radioactive waste KW - Mountains KW - Activation KW - Repositories KW - Assessments KW - Spent nuclear fuels KW - Boundaries KW - Viability UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1494362871?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Results+from+past+performance+assessments+for+the+Yucca+Mountain+disposal+system+for+spent+nuclear+fuel+and+high-level+radioactive+waste&rft.au=Rechard%2C+R+P&rft.aulast=Rechard&rft.aufirst=R&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=207&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2014-06-30 ER - TY - JOUR T1 - Expected dose and associated uncertainty and sensitivity analysis results for all scenario classes in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada AN - 1494362334; 18903737 AB - Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the U.S. Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. The conceptual structure and organization of the 2008 YM PA is based on decomposing the analysis into the following scenario classes: nominal, early waste package failure, early drip shield failure, igneous intrusive, igneous eruptive, seismic ground motion, and seismic fault displacement. This presentation describes how results obtained for the individual scenario classes are brought together in the determination of expected dose to the reasonably maximally exposed individual (RMEI) specified by the NRC in the regulatory requirements for the YM repository and presents associated uncertainty and sensitivity analysis results. The following topics are addressed: (i) determination of expected dose to the RMEI from all scenario classes, (ii) expected dose and uncertainty in expected dose to the RMEI for 0 to 20,000 yr, (iii) expected dose and uncertainty in expected dose to the RMEI from for 0 to 10 super(6) yr, (iv) justification for the decomposition procedure used to estimate expected dose to the RMEI from all scenario classes, and (v) effectiveness of individual barrier systems in reducing releases from the repository and thus dose to the RMEI. The present article is part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA; additional articles in the issue describe other aspects of the 2008 YM PA. JF - Reliability Engineering & System Safety AU - Helton, J C AU - Hansen, C W AU - Sallaberry, C J AD - Department 1514, Sandia National Laboratories, Albuquerque, NM 87185-0748, USA, jchelto@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 421 EP - 435 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - Ground motion KW - USA, Nevada, Yucca Mt. KW - Radioactive wastes KW - USA, Nevada KW - Performance assessment KW - Decomposition KW - Mountains KW - Sensitivity analysis KW - Safety engineering KW - Energy KW - Commissions KW - Geology KW - Hazardous wastes KW - Packaging KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1494362334?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Expected+dose+and+associated+uncertainty+and+sensitivity+analysis+results+for+all+scenario+classes+in+the+2008+performance+assessment+for+the+proposed+high-level+radioactive+waste+repository+at+Yucca+Mountain%2C+Nevada&rft.au=Helton%2C+J+C%3BHansen%2C+C+W%3BSallaberry%2C+C+J&rft.aulast=Helton&rft.aufirst=J&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=421&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mountains; Ground motion; Safety engineering; Sensitivity analysis; Energy; Commissions; Radioactive wastes; Geology; Performance assessment; Decomposition; Hazardous wastes; Packaging; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Conceptual structure and computational organization of the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada AN - 1494361915; 18903726 AB - Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. This presentation describes the overall conceptual structure and computational organization of the 2008 performance assessment (PA) for the proposed YM repository carried out by the DOE in support of a licensing application to the U.S. Nuclear Regulatory Commission (NRC). The following topics are addressed: (i) regulatory background, (ii) the three basic entities underlying a PA, (iii) determination of expected, mean and median dose to the reasonably maximally exposed individual (RMEI) specified in the NRC regulations for the YM repository, (iv) the relationship between probability, sets and scenario classes, (v) scenario classes and the characterization of aleatory uncertainty, (vi) scenario classes and the determination of expected dose to the RMEI, (vii) analysis decomposition, (viii) disjoint and nondisjoint scenario classes, (ix) scenario classes and the NRC's YM review plan, (x) characterization of epistemic uncertainty, and (xi) adequacy of Latin hypercube sample size used in the propagation of epistemic uncertainty. This article is part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA and is intended as an introduction to following articles in the issue that provide additional analysis details and specific analysis results. JF - Reliability Engineering & System Safety AU - Helton, J C AU - Hansen, C W AU - Sallaberry, C J AD - Department 1514, Sandia National Laboratories, Albuquerque, NM 87185-0748, USA, jchelto@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 223 EP - 248 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - USA, Nevada, Yucca Mt. KW - Licensing KW - Radioactive wastes KW - USA, Nevada KW - Performance assessment KW - Decomposition KW - Mountains KW - Safety engineering KW - Reviews KW - Energy KW - Commissions KW - Geology KW - Hazardous wastes KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1494361915?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Conceptual+structure+and+computational+organization+of+the+2008+performance+assessment+for+the+proposed+high-level+radioactive+waste+repository+at+Yucca+Mountain%2C+Nevada&rft.au=Helton%2C+J+C%3BHansen%2C+C+W%3BSallaberry%2C+C+J&rft.aulast=Helton&rft.aufirst=J&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=223&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mountains; Safety engineering; Energy; Reviews; Commissions; Licensing; Radioactive wastes; Geology; Performance assessment; Decomposition; Hazardous wastes; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Waste degradation and mobilization in performance assessments for the Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste AN - 1494318486; 18903723 AB - This paper summarizes modeling of waste degradation and mobilization in performance assessments (PAs) conducted between 1984 and 2008 to evaluate feasibility, viability, and assess compliance of a repository for spent nuclear fuel and high-level radioactive waste at Yucca Mountain in southern Nevada. As understanding of the Yucca Mountain disposal system increased, the waste degradation module, or succinctly called the source-term, evolved from initial assumptions in 1984 to results based on process modeling in 2008. In early PAs, waste degradation had significant influence on calculated behavior but as the robustness of the waste container was increased and modeling of the container degradation improved, waste degradation had much less influence in later PAs. The variation of dissolved concentrations of radionuclides progressed from simple probability distributions in early PAs to functions dependent upon water chemistry in later PAs. Also, transport modeling of radionuclides in the waste, container, and invert were added in 1995; and, colloid-facilitated transport of radionuclides was added in 1998. JF - Reliability Engineering & System Safety AU - Rechard, R P AU - Stockman, C T AD - Nuclear Waste Disposal Research & Analysis, P.O. Box 5800, Sandia National Laboratories, Albuquerque, NM 87185-0747, USA, rprecha@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 165 EP - 188 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - Feasibility studies KW - Containers KW - USA, Nevada, Yucca Mt. KW - Degradation KW - Compliance KW - Radioactive wastes KW - USA, Nevada KW - Performance assessment KW - Mountains KW - Safety engineering KW - Nuclear fuels KW - Radioisotopes KW - Waste disposal KW - Water chemistry KW - Hazardous wastes KW - H 2000:Transportation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1494318486?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Waste+degradation+and+mobilization+in+performance+assessments+for+the+Yucca+Mountain+disposal+system+for+spent+nuclear+fuel+and+high-level+radioactive+waste&rft.au=Rechard%2C+R+P%3BStockman%2C+C+T&rft.aulast=Rechard&rft.aufirst=R&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=165&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Feasibility studies; Containers; Degradation; Compliance; Radioactive wastes; Performance assessment; Mountains; Safety engineering; Nuclear fuels; Radioisotopes; Waste disposal; Water chemistry; Hazardous wastes; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Unsaturated flow modeling in performance assessments for the Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste AN - 1494312532; 18903721 AB - This paper summarizes the progression of modeling efforts of infiltration, percolation, and seepage conducted between 1984 and 2008 to evaluate feasibility, viability, and assess compliance of a repository in the unsaturated zone for spent nuclear fuel and high-level radioactive waste at Yucca Mountain, Nevada. Scientific understanding of infiltration in a desert environment, unsaturated percolation flux in fractures and matrix of the volcanic tuff, and seepage into an open drift in a thermally perturbed environment was initially lacking in 1984. As understanding of the Yucca Mountain disposal system increased through site characterization and in situ testing, modeling of infiltration, percolation, and seepage evolved from simple assumptions in a single model in 1984 to three modeling modules each based on several detailed process models in 2008. Uncertainty in percolation flux through Yucca Mountain was usually important in explaining the observed uncertainty in performance measures: cumulative release in assessments prior to 1995 and individual dose, thereafter. JF - Reliability Engineering & System Safety AU - Rechard, R P AU - Birkholzer, J T AU - Wu, Y-S AU - Stein, J S AU - Houseworth, JE AD - Nuclear Waste Disposal Research & Analysis, Sandia National Laboratories, P.O. Box 5800, Albuquerque 87185-0747, NM, USA, rprecha@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 124 EP - 144 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - Feasibility studies KW - Siting criteria KW - USA, Nevada, Yucca Mt. KW - Compliance KW - Volcanoes KW - Radioactive wastes KW - USA, Nevada KW - Performance assessment KW - Mountains KW - Safety engineering KW - Deserts KW - Nuclear fuels KW - Infiltration KW - Seepages KW - Hazardous wastes KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1494312532?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Unsaturated+flow+modeling+in+performance+assessments+for+the+Yucca+Mountain+disposal+system+for+spent+nuclear+fuel+and+high-level+radioactive+waste&rft.au=Rechard%2C+R+P%3BBirkholzer%2C+J+T%3BWu%2C+Y-S%3BStein%2C+J+S%3BHouseworth%2C+JE&rft.aulast=Rechard&rft.aufirst=R&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=124&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Feasibility studies; Siting criteria; Compliance; Radioactive wastes; Volcanoes; Performance assessment; Mountains; Safety engineering; Deserts; Nuclear fuels; Infiltration; Seepages; Hazardous wastes; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Waste package degradation from thermal and chemical processes in performance assessments for the Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste AN - 1494307975; 18903722 AB - This paper summarizes modeling of waste container degradation in performance assessments conducted between 1984 and 2008 to evaluate feasibility, viability, and assess compliance of a repository for spent nuclear fuel and high-level radioactive waste at Yucca Mountain, Nevada. As understanding of the Yucca Mountain disposal system increased, modeling of container degradation evolved from a component of the source term in 1984 to a separate module describing both container and drip shield degradation in 2008. A thermal module for evaluating the influence of higher heat loads from more closely packed, large waste packages was also introduced. In addition, a module for evaluating drift chemistry was added in later PAs to evaluate the potential for localized corrosion of the outer barrier of the waste container composed of Alloy 22, a highly corrosion-resistant nickel-chromium-tungsten-molybdenum alloy. The uncertainty of parameters related to container degradation contributed significantly to the estimated uncertainty of performance measures (cumulative release in assessments prior to 1995 and individual dose, thereafter). JF - Reliability Engineering & System Safety AU - Rechard, R P AU - Lee, J H AU - Hardin, EL AU - Bryan, C R AD - Nuclear Waste Disposal Researches Analysis, Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185-0747, USA rprecha@sandia.gov Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 145 EP - 164 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Corrosion Abstracts (CO); CSA / ASCE Civil Engineering Abstracts (CE) KW - Radioactive waste KW - Mountains KW - Containers KW - Nickel base alloys KW - Degradation KW - Modules KW - Spent nuclear fuels KW - Waste containers UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1494307975?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Waste+package+degradation+from+thermal+and+chemical+processes+in+performance+assessments+for+the+Yucca+Mountain+disposal+system+for+spent+nuclear+fuel+and+high-level+radioactive+waste&rft.au=Rechard%2C+R+P%3BLee%2C+J+H%3BHardin%2C+EL%3BBryan%2C+C+R&rft.aulast=Rechard&rft.aufirst=R&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=145&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2017-02-03 ER - TY - JOUR T1 - Expected dose and associated uncertainty and sensitivity analysis results for the human intrusion scenario in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada AN - 1492661684; 18903738 AB - Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the U.S. Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. This presentation describes the determination of expected (mean) dose to the reasonably maximally exposed individual (RMEI) specified in the NRC regulations for the YM repository resulting from an inadvertent drilling intrusion into the repository. The following topics are addressed: (i) assumed properties of an inadvertent drilling intrusion and the determination of the associated dose and expected (mean) dose to the RMEI, (ii) uncertainty and sensitivity analysis results for expected dose to the RMEI, and (iii) the numerical stability of the sampling-based procedure used to estimate expected (mean) dose to the RMEI. The present article is part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA; additional articles in the issue describe other aspects of the 2008 YM PA. JF - Reliability Engineering & System Safety AU - Hansen, C W AU - Behie, G A AU - Brooks, K M AU - Chen, Y AU - Helton, J C AU - Hommel, S P AU - Lee, K P AU - Lester, B AU - Mattie, P D AU - Mehta, S AU - Miller, S P AU - Sallaberry, C J AU - Sevougian, S D AD - Department 6112, Sandia National Laboratories, Albuquerque, NM 87185-1033, USA, cwhanse@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 436 EP - 441 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - Mountains KW - USA, Nevada, Yucca Mt. KW - Sensitivity analysis KW - Safety engineering KW - Energy KW - Commissions KW - Radioactive wastes KW - Geology KW - USA, Nevada KW - Performance assessment KW - Hazardous wastes KW - H 6000:Natural Disasters/Civil Defense/Emergency Management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492661684?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Expected+dose+and+associated+uncertainty+and+sensitivity+analysis+results+for+the+human+intrusion+scenario+in+the+2008+performance+assessment+for+the+proposed+high-level+radioactive+waste+repository+at+Yucca+Mountain%2C+Nevada&rft.au=Hansen%2C+C+W%3BBehie%2C+G+A%3BBrooks%2C+K+M%3BChen%2C+Y%3BHelton%2C+J+C%3BHommel%2C+S+P%3BLee%2C+K+P%3BLester%2C+B%3BMattie%2C+P+D%3BMehta%2C+S%3BMiller%2C+S+P%3BSallaberry%2C+C+J%3BSevougian%2C+S+D&rft.aulast=Hansen&rft.aufirst=C&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=436&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mountains; Safety engineering; Sensitivity analysis; Energy; Commissions; Radioactive wastes; Geology; Performance assessment; Hazardous wastes; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Expected dose for the nominal scenario class in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada AN - 1492643287; 18903728 AB - Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the U.S. Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. This presentation describes the determination of expected (mean) dose to the reasonably maximally exposed individual (RMEI) specified in the NRC regulations for the YM repository for the nominal scenario class (i.e., under nominal or undisturbed conditions) in the 2008 YM PA. The following topics are addressed: (i) properties of the nominal scenario class and the determination of dose and expected (mean) dose to the RMEI, (ii) uncertainty in dose and resultant expected (mean) dose to the RMEI, (iii) expected (mean) dose to the RMEI from individual radionuclides, and (iv) numerical stability of the sampling-based procedure used to estimate the expected (mean) dose to the RMEI. The present paper is part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA; additional papers in the issue describe other aspects of the 2008 YM PA. JF - Reliability Engineering & System Safety AU - Helton, J C AU - Hansen, C W AU - Sallaberry, C J AD - Department 1514, Sandia National Laboratories, Albuquerque, NM 87185-0748, USA, jchelto@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 267 EP - 271 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - Mountains KW - USA, Nevada, Yucca Mt. KW - Safety engineering KW - Energy KW - Commissions KW - Radioactive wastes KW - Radioisotopes KW - Geology KW - USA, Nevada KW - Performance assessment KW - Hazardous wastes KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492643287?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Expected+dose+for+the+nominal+scenario+class+in+the+2008+performance+assessment+for+the+proposed+high-level+radioactive+waste+repository+at+Yucca+Mountain%2C+Nevada&rft.au=Helton%2C+J+C%3BHansen%2C+C+W%3BSallaberry%2C+C+J&rft.aulast=Helton&rft.aufirst=J&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=267&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mountains; Safety engineering; Energy; Commissions; Radioisotopes; Radioactive wastes; Geology; Performance assessment; Hazardous wastes; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Uncertainty and sensitivity analysis for the nominal scenario class in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada AN - 1492627627; 18903729 AB - Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the U.S. Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. This presentation describes uncertainty and sensitivity analysis results for the nominal scenario class (i.e., for undisturbed conditions) obtained in the 2008 YM PA. The following topics are addressed: (i) uncertainty and sensitivity analysis procedures, (ii) drip shield and waste package failure, (iii) engineered barrier system conditions, (iv) radionuclide release results for the engineered barrier system, unsaturated zone, and saturated zone, and (v) dose to the reasonably maximally exposed individual specified in the NRC regulations for the YM repository. The present article is part of a special issue of Reliability Engineering and System Safely devoted to the 2008 YM PA; additional articles in the issue describe other aspects of the 2008 YM PA. JF - Reliability Engineering & System Safety AU - Hansen, C W AU - Behie, G A AU - Bier, A AU - Brooks, K M AU - Chen, Y AU - Helton, J C AU - Hommel, S P AU - Lee, K P AU - Lester, B AU - Mattie, P D AU - Mehta, S AU - Miller, S P AU - Sallaberry, C J AU - Sevougian, S D AU - Vo, P AD - Department 6112, Sandia National Laboratories, PO Box 5800, Albuquerque, NM 87185-1033, USA, cwhanse@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 272 EP - 296 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - USA, Nevada, Yucca Mt. KW - Radioactive wastes KW - USA, Nevada KW - Performance assessment KW - Mountains KW - Sensitivity analysis KW - Safety engineering KW - Energy KW - Commissions KW - Radioisotopes KW - Geology KW - Hazardous wastes KW - Packaging KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492627627?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Uncertainty+and+sensitivity+analysis+for+the+nominal+scenario+class+in+the+2008+performance+assessment+for+the+proposed+high-level+radioactive+waste+repository+at+Yucca+Mountain%2C+Nevada&rft.au=Hansen%2C+C+W%3BBehie%2C+G+A%3BBier%2C+A%3BBrooks%2C+K+M%3BChen%2C+Y%3BHelton%2C+J+C%3BHommel%2C+S+P%3BLee%2C+K+P%3BLester%2C+B%3BMattie%2C+P+D%3BMehta%2C+S%3BMiller%2C+S+P%3BSallaberry%2C+C+J%3BSevougian%2C+S+D%3BVo%2C+P&rft.aulast=Hansen&rft.aufirst=C&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=272&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mountains; Safety engineering; Sensitivity analysis; Energy; Commissions; Radioisotopes; Radioactive wastes; Geology; Performance assessment; Hazardous wastes; Packaging; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Expected dose for the igneous scenario classes in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada AN - 1492627523; 18903732 AB - Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the U.S. Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. This presentation describes the determination of expected dose to the reasonably maximally exposed individual (RMEI) specified in the NRC regulations for the YM repository for the igneous intrusive scenario class and the igneous eruptive scenario class in the 2008 YM PA. The following topics are addressed: (i) properties of the igneous scenario classes and the determination of dose and expected dose to the RMEI, (ii) expected dose and uncertainty in expected dose to the RMEI from the igneous intrusive scenario class, (iii) expected dose and uncertainty in expected dose to the RMEI from the igneous eruptive scenario class, (iv) expected dose and uncertainty in expected dose to the RMEI from the combined igneous intrusive and igneous eruptive scenario class, and (v) uncertainty in the occurrence of igneous scenario classes. The present article is part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA; additional articles in the issue describe other aspects of the 2008 YM PA. JF - Reliability Engineering & System Safety AU - Sallaberry, C J AU - Hansen, C W AU - Helton, J C AD - Department 6224, Sandia National Laboratories, Albuquerque, NM 87185-0747, USA, cnsalla@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 339 EP - 353 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - Mountains KW - USA, Nevada, Yucca Mt. KW - Safety engineering KW - Energy KW - Commissions KW - Radioactive wastes KW - Geology KW - USA, Nevada KW - Performance assessment KW - Hazardous wastes KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492627523?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Expected+dose+for+the+igneous+scenario+classes+in+the+2008+performance+assessment+for+the+proposed+high-level+radioactive+waste+repository+at+Yucca+Mountain%2C+Nevada&rft.au=Sallaberry%2C+C+J%3BHansen%2C+C+W%3BHelton%2C+J+C&rft.aulast=Sallaberry&rft.aufirst=C&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=339&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mountains; Safety engineering; Energy; Commissions; Radioactive wastes; Geology; Performance assessment; Hazardous wastes; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Expected dose for the early failure scenario classes in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada AN - 1492627447; 18903730 AB - Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the U.S. Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. This presentation describes the determination of expected dose to the reasonably maximally exposed individual (RMEI) specified in the NRC regulations for the YM repository for the early waste package (WP) failure scenario class and the early drip shield (DS) failure scenario class in the 2008 YM PA. The following topics are addressed: (i) properties of the early failure scenario classes and the determination of dose and expected dose the RMEI, (ii) expected dose and uncertainty in expected dose to the RMEI from the early WP failure scenario class, (iii) expected dose and uncertainty in expected dose to the RMEI from the early DS failure scenario class, (iv) expected dose and uncertainty in expected dose to the RMEI from the combined early WP and early DS failure scenario class with and without the inclusion of failures resulting from nominal processes, and (v) uncertainty in the occurrence of early failure scenario classes. The present article is part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA; additional articles in the issue describe other aspects of the 2008 YM PA. JF - Reliability Engineering & System Safety AU - Helton, J C AU - Hansen, C W AU - Sallaberry, C J AD - Department 1514, Sandia National Laboratories, Albuquerque, NM 87185-0748, USA, jchelto@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 297 EP - 309 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - Mountains KW - USA, Nevada, Yucca Mt. KW - Safety engineering KW - Energy KW - Commissions KW - Radioactive wastes KW - Geology KW - USA, Nevada KW - Performance assessment KW - Hazardous wastes KW - Packaging KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492627447?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Expected+dose+for+the+early+failure+scenario+classes+in+the+2008+performance+assessment+for+the+proposed+high-level+radioactive+waste+repository+at+Yucca+Mountain%2C+Nevada&rft.au=Helton%2C+J+C%3BHansen%2C+C+W%3BSallaberry%2C+C+J&rft.aulast=Helton&rft.aufirst=J&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=297&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mountains; Safety engineering; Energy; Commissions; Radioactive wastes; Geology; Performance assessment; Hazardous wastes; Packaging; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Uncertainty and sensitivity analysis for the igneous scenario classes in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada AN - 1492627289; 18903733 AB - Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the U.S. Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. This presentation describes uncertainty and sensitivity analysis results for the igneous intrusive scenario class and the igneous eruptive scenario class obtained in the 2008 YM PA. The following topics are addressed for the igneous intrusive scenario class: (i) engineered barrier system conditions, (ii) release results for the engineered barrier system, unsaturated zone, and saturated zone, (iii) dose to the reasonably maximally exposed individual (RMEI) specified in the NRC regulations for the YM repository, and (iv) expected dose to the RMEI. In addition, expected dose to the RMEI for the igneous eruptive scenario class is also considered. The present article is part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA; additional articles in the issue describe other aspects of the 2008 YM PA. JF - Reliability Engineering & System Safety AU - Sallaberry, C J AU - Behie, G A AU - Bier, A AU - Brooks, K M AU - Chen, Y AU - Hansen, C W AU - Helton, J C AU - Hommel, S P AU - Lee, K P AU - Lester, B AU - Mattie, P D AU - Mehta, S AU - Miller, S P AU - Sevougian, S D AU - Vo, P AD - Department 6224, Sandia National Laboratories, Albuquerque, NM 87185-0747, USA, cnsalla@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 354 EP - 379 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - Mountains KW - USA, Nevada, Yucca Mt. KW - Sensitivity analysis KW - Safety engineering KW - Energy KW - Commissions KW - Radioactive wastes KW - Geology KW - USA, Nevada KW - Performance assessment KW - Hazardous wastes KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492627289?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Uncertainty+and+sensitivity+analysis+for+the+igneous+scenario+classes+in+the+2008+performance+assessment+for+the+proposed+high-level+radioactive+waste+repository+at+Yucca+Mountain%2C+Nevada&rft.au=Sallaberry%2C+C+J%3BBehie%2C+G+A%3BBier%2C+A%3BBrooks%2C+K+M%3BChen%2C+Y%3BHansen%2C+C+W%3BHelton%2C+J+C%3BHommel%2C+S+P%3BLee%2C+K+P%3BLester%2C+B%3BMattie%2C+P+D%3BMehta%2C+S%3BMiller%2C+S+P%3BSevougian%2C+S+D%3BVo%2C+P&rft.aulast=Sallaberry&rft.aufirst=C&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=354&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mountains; Safety engineering; Sensitivity analysis; Energy; Commissions; Radioactive wastes; Geology; Performance assessment; Hazardous wastes; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Assessment of compliance with ground water protection standards in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada AN - 1492624716; 18903739 AB - Extensive work has been carried out by the U.S. Department of Energy (DOE) in the development of a proposed geologic repository at Yucca Mountain (YM), Nevada, for the disposal of high-level radioactive waste. In support of this development and an associated license application to the U.S. Nuclear Regulatory Commission (NRC), the DOE completed an extensive performance assessment (PA) for the proposed YM repository in 2008. This presentation describes the assessment of compliance with ground water protection standards in the 2008 YM PA. The following topics are addressed: (i) regulatory background, (ii) analysis structure including characterization of uncertainty, and (iii) analysis results for each of the ground water protection standards. The present article is part of a special issue of Reliability Engineering and System Safety devoted to the 2008 YM PA; additional articles in the issue describe other aspects of the 2008 YM PA. JF - Reliability Engineering & System Safety AU - Hansen, C W AU - Behie, G A AU - Brooks, K M AU - Chen, Y AU - Helton, J C AU - Hommel, S P AU - Lee, K P AU - Lester, B AU - Mattie, P D AU - Mehta, S AU - Miller, S P AU - Sallaberry, C J AU - Sevougian, S D AU - Wasiolek, M AD - Department 6112, Sandia National Laboratories, Albuquerque, NM 87185-1033, USA, cwhanse@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 442 EP - 448 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - USA, Nevada, Yucca Mt. KW - Compliance KW - Radioactive wastes KW - USA, Nevada KW - Performance assessment KW - Mountains KW - Safety engineering KW - Energy KW - Commissions KW - Geology KW - Groundwater KW - Hazardous wastes KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492624716?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Assessment+of+compliance+with+ground+water+protection+standards+in+the+2008+performance+assessment+for+the+proposed+high-level+radioactive+waste+repository+at+Yucca+Mountain%2C+Nevada&rft.au=Hansen%2C+C+W%3BBehie%2C+G+A%3BBrooks%2C+K+M%3BChen%2C+Y%3BHelton%2C+J+C%3BHommel%2C+S+P%3BLee%2C+K+P%3BLester%2C+B%3BMattie%2C+P+D%3BMehta%2C+S%3BMiller%2C+S+P%3BSallaberry%2C+C+J%3BSevougian%2C+S+D%3BWasiolek%2C+M&rft.aulast=Hansen&rft.aufirst=C&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=442&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mountains; Safety engineering; Energy; Commissions; Compliance; Radioactive wastes; Geology; Performance assessment; Groundwater; Hazardous wastes; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Representation of aleatory uncertainty associated with the seismic ground motion scenario class in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada AN - 1492606526; 18903735 AB - The representation of aleatory uncertainty associated with the seismic ground motion scenario class in the 2008 performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada, is described. The following topics are considered: (i) occurrence rates for waste package (WP) damage, (ii) conditional distributions for peak ground velocity, (iii) conditional distributions for damaged area on WPs, (iv) distribution of rock fall volume, and (v) probability of WP rupture. Separate results are obtained for commercial spent nuclear fuel and codisposed spent nuclear fuel WPs. JF - Reliability Engineering & System Safety AU - Helton, J C AU - Gross, M G AU - Sallaberry, C J AD - Department 1514, Sandia National Laboratories, Albuquerque, NM 87185-0748, USA, jchelto@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 399 EP - 405 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - Mountains KW - Ground motion KW - USA, Nevada, Yucca Mt. KW - Safety engineering KW - Nuclear fuels KW - Radioactive wastes KW - Velocity KW - USA, Nevada KW - Performance assessment KW - Hazardous wastes KW - Packaging KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492606526?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Representation+of+aleatory+uncertainty+associated+with+the+seismic+ground+motion+scenario+class+in+the+2008+performance+assessment+for+the+proposed+high-level+radioactive+waste+repository+at+Yucca+Mountain%2C+Nevada&rft.au=Helton%2C+J+C%3BGross%2C+M+G%3BSallaberry%2C+C+J&rft.aulast=Helton&rft.aufirst=J&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=399&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Mountains; Ground motion; Safety engineering; Nuclear fuels; Radioactive wastes; Velocity; Performance assessment; Hazardous wastes; Packaging; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - Site characterization of the Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste AN - 1475539797; 18903717 AB - This paper summarizes the investigations conducted to characterize the geologic barrier of the Yucca Mountain disposal system. Site characterization progressed through (1) non-intrusive evaluation and borehole completions to determine stratigraphy for site identification; (2) exploration from the surface through well testing to evaluate the repository feasibility; (3) underground exploration to study coupled processes to evaluate repository suitability; and (4) reporting of experimental conclusions to support the repository compliance phase. Some of the scientific and technical challenges encountered included the evolution from a small preconstruction characterization program with much knowledge to be acquired during construction of the repository to a large characterization program with knowledge acquired prior to submission of the license application for construction authorization in June 2008 (i.e., the evolution from a preconstruction characterization program costing < $0.04 x 10 super(9) as estimated by the Nuclear Regulatory Commission in 1982 to a thorough characterization, design, and analysis program costing $11 x 10 super(9)-latter in 2010 constant dollars). Scientific understanding of unsaturated flow in fractures and seepage into an open drift in a thermally perturbed environment was initially lacking, so much site characterization expense was required to develop this knowledge. JF - Reliability Engineering & System Safety AU - Rechard, R P AU - Liu, H-H AU - Tsang, Y W AU - Finsterle, S AD - Nuclear Waste Disposal Research & Analysis, Sandia National Laboratories, P.O. Box 5800, Albuquerque 87185-0747, NM, USA rprecha@sandia.gov Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 32 EP - 52 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Mountains KW - Repositories KW - Construction costs KW - Cost analysis KW - Spent nuclear fuels KW - Nuclear waste disposal KW - Licenses KW - Exploration UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475539797?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Site+characterization+of+the+Yucca+Mountain+disposal+system+for+spent+nuclear+fuel+and+high-level+radioactive+waste&rft.au=Rechard%2C+R+P%3BLiu%2C+H-H%3BTsang%2C+Y+W%3BFinsterle%2C+S&rft.aulast=Rechard&rft.aufirst=R&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=32&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2017-02-03 ER - TY - JOUR T1 - Evolution of repository and waste package designs for Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste AN - 1475539398; 18903718 AB - This paper summarizes the evolution of the engineered barrier design for the proposed Yucca Mountain disposal system. Initially, the underground facility used a fairly standard panel and drift layout excavated mostly by drilling and blasting. By 1993, the layout of the underground facility was changed to accommodate construction by a tunnel boring machine. Placement of the repository in unsaturated zone permitted an extended period without backfilling; placement of the waste package in an open drift permitted use of much larger, and thus hotter packages. Hence in 1994, the underground facility design switched from floor emplacement of waste in small, single walled stainless steel or nickel alloy containers to in-drift emplacement of waste in large, double-walled containers. By 2000, the outer layer was a high nickel alloy for corrosion resistance and the inner layer was stainless steel for structural strength. Use of large packages facilitated receipt and disposal of high volumes of spent nuclear fuel. In addition, in-drift package placement saved excavation costs. Options considered for in-drift emplacement included different heat loads and use of backfill. To avoid dripping on the package during the thermal period and the possibility of localized corrosion, titanium drip shields were added for the disposal drifts by 2000. In addition, a handling canister, sealed at the reactor to eliminate further handling of bare fuel assemblies, was evaluated and eventually adopted in 2006. Finally, staged development of the underground layout was adopted to more readily adjust to changes in waste forms and Congressional funding. JF - Reliability Engineering & System Safety AU - Rechard, R P AU - Voegele, MD AD - Nuclear Waste Disposal Research & Analysis, P.O. Box 5800, Sandia National Laboratories, Albuquerque, NM 87185-0747, USA rprecha@sandia.gov Y1 - 2014/02// PY - 2014 DA - February 2014 SP - 53 EP - 73 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Corrosion Abstracts (CO); CSA / ASCE Civil Engineering Abstracts (CE) KW - Mountains KW - Underground storage KW - Packages KW - Design engineering KW - Drift KW - Spent nuclear fuels KW - Nuclear waste disposal KW - Placement UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475539398?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Evolution+of+repository+and+waste+package+designs+for+Yucca+Mountain+disposal+system+for+spent+nuclear+fuel+and+high-level+radioactive+waste&rft.au=Rechard%2C+R+P%3BVoegele%2C+MD&rft.aulast=Rechard&rft.aufirst=R&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=53&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2017-02-03 ER - TY - JOUR T1 - Site selection and regulatory basis for the Yucca Mountain disposal system for spent nuclear fuel and high-level radioactive waste AN - 1475538816; 18903716 AB - This paper summarizes the historical events from the identification of the Yucca Mountain site in southern Nevada in 1978 to its selection by the US Congress as the sole site to characterize for a repository for spent nuclear fuel and high-level radioactive waste in 1987. Coincident with this selection process and later site characterization, the US spent from 1977 to 2009 establishing long-term, radiation protection standards and a regulatory framework for demonstrating compliance. When first promulgated, the US Environmental Protection Agency's radiation protection standards limited cumulative release of radionuclides at a boundary less than or equal to 5 km from the edge of a generic repository over a 10 super(4)-year regulatory period. But in 2001, site-specific standards for a repository at Yucca Mountain were promulgated to limit the dose to an individual at a point less than or equal to similar to 18 km from the repository edge in the predominant direction of groundwater flow over a 10 super(6)-year period. Also during the 33-year effort, the regulatory framework of the US Nuclear Regulatory Commission, which implemented the radiation protection standards, changed from setting performance criteria on barrier subsystem components in 1983 to the identification and technical justification for barrier performance based on a performance assessment. Also, reasonable expectation as the standard of proof for evaluating compliance was clarified. JF - Reliability Engineering & System Safety AU - Rechard, R P AU - Cotton, T A AU - Voegele, MD AD - Nuclear Waste Disposal Research & Analysis, Sandia National Laboratories, P.O. Box 5800, Albuquerque 87185-0747, NM, USA, rprecha@sandia.gov Y1 - 2014/02// PY - 2014 DA - Feb 2014 SP - 7 EP - 31 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 122 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - Historical account KW - Siting criteria KW - USA, Nevada, Yucca Mt. KW - Congress KW - Compliance KW - Radioactive wastes KW - USA, Nevada KW - Performance assessment KW - Site selection KW - Mountains KW - EPA KW - Safety engineering KW - Commissions KW - Nuclear fuels KW - Groundwater KW - Hazardous wastes KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475538816?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Site+selection+and+regulatory+basis+for+the+Yucca+Mountain+disposal+system+for+spent+nuclear+fuel+and+high-level+radioactive+waste&rft.au=Rechard%2C+R+P%3BCotton%2C+T+A%3BVoegele%2C+MD&rft.aulast=Rechard&rft.aufirst=R&rft.date=2014-02-01&rft.volume=122&rft.issue=&rft.spage=7&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Historical account; Siting criteria; Congress; Compliance; Radioactive wastes; Performance assessment; Mountains; Site selection; EPA; Safety engineering; Nuclear fuels; Commissions; Groundwater; Hazardous wastes; USA, Nevada, Yucca Mt.; USA, Nevada ER - TY - JOUR T1 - High-resolution chemical analysis on cycled LiFePO sub(4) battery electrodes using energy-filtered transmission electron microscopy AN - 1475559764; 18815327 AB - We demonstrate an ex situ method for analyzing the chemistry of battery electrode particles after electrochemical cycling using the transmission electron microscope (TEM). The arrangement of particles during our analysis is the same as when the particles are being cycled. We start by sectioning LiFePO sub(4) battery electrodes using an ultramicrotome. We then show that mapping of the Fe super(2+) and Fe super(3+) oxidation state using energy-filtered TEM (EFTEM) and multivariate statistical analysis techniques can be used to determine the spatial distribution of Li in the particles. This approach is validated by comparison with scanning transmission X-ray microscopy (STXM) analysis of the same samples [Chueh et al. Nanoletters, 13 (3) (2013) 866-72]. EFTEM uses a parallel electron beam and reduces the electron-beam dose (and potential beam-induced damage) to the sample when compared to alternate techniques that use a focused probe (e.g. STEM-EELS). Our analysis confirms that under the charging conditions of the analyzed battery, mixed phase particles are rare and thus Li intercalation is limited by the nucleation of new phases. JF - Journal of Power Sources AU - Sugar, J D AU - El Gabaly, F AU - Chueh, W C AU - Fenton, K R AU - Tyliszczak, T AU - Kotula, P G AU - Bartelt, N C AD - Sandia National Laboratories, Livermore, CA 94550, USA, jdsugar@sandia.gov Y1 - 2014/01/15/ PY - 2014 DA - 2014 Jan 15 SP - 512 EP - 521 PB - Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 246 SN - 0378-7753, 0378-7753 KW - Environment Abstracts KW - Batteries KW - Spatial distribution KW - Electrodes KW - Microscopy KW - Oxidation KW - Particulates KW - Mapping KW - Electrochemistry KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475559764?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Power+Sources&rft.atitle=High-resolution+chemical+analysis+on+cycled+LiFePO+sub%284%29+battery+electrodes+using+energy-filtered+transmission+electron+microscopy&rft.au=Sugar%2C+J+D%3BEl+Gabaly%2C+F%3BChueh%2C+W+C%3BFenton%2C+K+R%3BTyliszczak%2C+T%3BKotula%2C+P+G%3BBartelt%2C+N+C&rft.aulast=Sugar&rft.aufirst=J&rft.date=2014-01-15&rft.volume=246&rft.issue=&rft.spage=512&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Spatial distribution; Batteries; Oxidation; Microscopy; Electrodes; Mapping; Particulates; Electrochemistry ER - TY - JOUR T1 - Application of Redox Non-Innocent Ligands to Non-Aqueous Flow Battery Electrolytes AN - 1770327375; 18967963 AB - High energy-density, redox flow batteries (RFB) can provide cost-effective, grid-scale energy storage, facilitating the use of intermittent sources such as solar and wind power. A new electrolyte based on vanadium and redox-active ligands that stores equivalents of charge separately from the metal center is presented. Electrolytes composed of non-innocent ligands greatly enhance both the energy density and stability of non-aqueous RFBs JF - Advanced Energy Materials AU - Cappillino, Patrick J AU - Pratt, Harry D AU - Hudak, Nicholas S AU - Tomson, Neil C AU - Anderson, Travis M AU - Anstey, Mitchell R AD - Sandia National Laboratories, P.O. Box 969 MS 9292, Livermore, CA, 94551. Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 1 EP - 4 PB - Wiley-Blackwell, Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 4 IS - 1 SN - 1614-6832, 1614-6832 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); ANTE: Abstracts in New Technologies and Engineering (AN); Aerospace & High Technology Database (AH) KW - dithiolene KW - redox-active ligands KW - ion pairs KW - electrochemical grid energy storage KW - redox flow batteries KW - Rechargeable batteries KW - Wind power KW - Equivalence KW - Electrolytes KW - Ion pairs KW - Energy storage KW - Stores KW - Ligands KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1770327375?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advanced+Energy+Materials&rft.atitle=Application+of+Redox+Non-Innocent+Ligands+to+Non-Aqueous+Flow+Battery+Electrolytes&rft.au=Cappillino%2C+Patrick+J%3BPratt%2C+Harry+D%3BHudak%2C+Nicholas+S%3BTomson%2C+Neil+C%3BAnderson%2C+Travis+M%3BAnstey%2C+Mitchell+R&rft.aulast=Cappillino&rft.aufirst=Patrick&rft.date=2014-01-01&rft.volume=4&rft.issue=1&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Advanced+Energy+Materials&rft.issn=16146832&rft_id=info:doi/10.1002%2Faenm.201300566 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-03-04 DO - http://dx.doi.org/10.1002/aenm.201300566 ER - TY - JOUR T1 - Considerations in the Design of Materials for Solar-Driven Fuel Production Using Metal-Oxide Thermochemical Cycles AN - 1770272310; 19044141 AB - With demand for energy increasing worldwide and an ever-stronger case building for anthropogenic climate change, the need for carbon-neutral fuels is becoming an imperative. Extensive transportation infrastructure based on liquid hydrocarbon fuels motivates development of processes using solar energy to convert CO sub(2) and H sub(2)O to fuel precursors such as synthesis gas. Here, perspectives concerning the use of solar-driven thermochemical cycles using metal oxides to produce fuel precursors are given and, in particular, the important relationship between reactor design and material selection is discussed. Considering both a detailed thermodynamic analysis and factors such as reaction kinetics, volatility, and phase stability, an integrated analytical approach that facilitates material design is presented. These concepts are illustrated using three oxide materials currently receiving considerable attention: metal-substituted ferrites, ceria, and doped cerias. Although none of these materials is "ideal," the tradeoffs made in selecting any one of them are clearly indicated, providing a starting point for assessing the feasibility of alternative materials developed in the future. Increasing demand for energy and anthropogenic climate change make carbon-neutral fuels an imperative. Transportation infrastructure based on liquid fuels motivates the development of solar-driven processes to convert CO sub(2) and H sub(2)O to fuel precursors. This perspective concerns the use of solar-driven thermochemical cycles based on metal oxides to produce fuel precursors and the synergistic relationship between reactor design and material selection. JF - Advanced Energy Materials AU - Miller, James E AU - McDaniel, Anthony H AU - Allendorf, Mark D AD - Sandia National Laboratories, Albuquerque, NM, 87185. Y1 - 2014/01// PY - 2014 DA - January 2014 SP - [np] PB - Wiley-Blackwell, Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 4 IS - 2 SN - 1614-6832, 1614-6832 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); ANTE: Abstracts in New Technologies and Engineering (AN); Aerospace & High Technology Database (AH) KW - carbon dioxide KW - ceria KW - ferrite KW - gas splitting KW - hydrogen KW - Precursors KW - Cerium oxide KW - Fuels KW - Ferrite KW - Metal oxides KW - Reactor design KW - Carbon dioxide KW - Materials selection KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1770272310?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advanced+Energy+Materials&rft.atitle=Considerations+in+the+Design+of+Materials+for+Solar-Driven+Fuel+Production+Using+Metal-Oxide+Thermochemical+Cycles&rft.au=Miller%2C+James+E%3BMcDaniel%2C+Anthony+H%3BAllendorf%2C+Mark+D&rft.aulast=Miller&rft.aufirst=James&rft.date=2014-01-01&rft.volume=4&rft.issue=2&rft.spage=%5Bnp%5D&rft.isbn=&rft.btitle=&rft.title=Advanced+Energy+Materials&rft.issn=16146832&rft_id=info:doi/10.1002%2Faenm.201300469 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-06-30 DO - http://dx.doi.org/10.1002/aenm.201300469 ER - TY - JOUR T1 - Precision geometric processing of Mini-RF bistatic radar images of the Moon AN - 1756507756; 2016-004227 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Kirk, R L AU - Barrett, J M AU - Wahl, D E AU - Erteza, I AU - Jackowatz, C V AU - Yocky, D A AU - Bussey, D B J AU - Paterson, G W AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract no. 2548 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - methods KW - imagery KW - precision KW - Moon KW - Lunar Reconnaissance Orbiter KW - data processing KW - radar methods KW - Mini-RF KW - digital terrain models KW - geometry KW - topography KW - ice KW - image enhancement KW - bistatic radar KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1756507756?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Precision+geometric+processing+of+Mini-RF+bistatic+radar+images+of+the+Moon&rft.au=Kirk%2C+R+L%3BBarrett%2C+J+M%3BWahl%2C+D+E%3BErteza%2C+I%3BJackowatz%2C+C+V%3BYocky%2C+D+A%3BBussey%2C+D+B+J%3BPaterson%2C+G+W%3BAnonymous&rft.aulast=Kirk&rft.aufirst=R&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - www.hou.usra.edu/meetings/lpsc2014/pdf/2548.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 17 N1 - PubXState - TX N1 - SuppNotes - Accessed on Jul. 27, 2015 N1 - Last updated - 2016-01-14 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - bistatic radar; data processing; digital terrain models; geometry; ice; image enhancement; imagery; Lunar Reconnaissance Orbiter; methods; Mini-RF; Moon; precision; radar methods; topography ER - TY - JOUR T1 - Reactivity of structural iron in natural nontronite NAu-1 and synthetic Fe phyllosilicate AN - 1707520896; 2015-083410 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Ilgen, Anastasia G AU - Kruichak, Jessica N AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 1088 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - silicates KW - experimental studies KW - selenium KW - oxidation KW - arsenic KW - crystal structure KW - nontronite KW - iron KW - ferrous iron KW - clay minerals KW - reactivity KW - chemical reactions KW - metals KW - sheet silicates KW - synthetic materials KW - Eh KW - chromium KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707520896?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Reactivity+of+structural+iron+in+natural+nontronite+NAu-1+and+synthetic+Fe+phyllosilicate&rft.au=Ilgen%2C+Anastasia+G%3BKruichak%2C+Jessica+N%3BAnonymous&rft.aulast=Ilgen&rft.aufirst=Anastasia&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=1088&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Document feature - illus. N1 - Last updated - 2015-08-27 N1 - SubjectsTermNotLitGenreText - arsenic; chemical reactions; chromium; clay minerals; crystal structure; Eh; experimental studies; ferrous iron; iron; metals; nontronite; oxidation; reactivity; selenium; sheet silicates; silicates; synthetic materials ER - TY - JOUR T1 - Advancements in Evacuation Time Estimate Studies Contribute to Improved Protective Action Strategies AN - 1692322683; PQ0001263175 AB - Through a systematic approach that began with research of large scale evacuations and included review of protective action recommendations and risk estimates from alternative protective actions, characteristics important to emergency response were identified. Some of these characteristics were converted into criteria and implemented in the updated guidance for ETE studies. JF - Transactions of the American Nuclear Society AU - Jones, Joe AU - Sullivan, Randy AU - Wolshon, Brian AD - Sandia National Laboratories: 1515 Eubank SE, Albuquerque, NM, 87123-0748 jojones@sandia.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 932 EP - 933 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Risk KW - Evacuation KW - Estimates KW - Strategy KW - Emergency response KW - Protective KW - Criteria UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692322683?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Advancements+in+Evacuation+Time+Estimate+Studies+Contribute+to+Improved+Protective+Action+Strategies&rft.au=Jones%2C+Joe%3BSullivan%2C+Randy%3BWolshon%2C+Brian&rft.aulast=Jones&rft.aufirst=Joe&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=932&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-09-07 ER - TY - JOUR T1 - Modeling Protective Action Strategies Using MACCS AN - 1692321830; PQ0001263176 AB - The MELCOR Accident Consequence Code System (MACCS) has been widely distributed and used over the last decade throughout the Department of Energy (DOE) complex, the Nuclear Regulatory Commission (NRC), and private industry. The envelope has been pushed over the last several years to consider and develop methodologies on how to better model evacuations resulting from a radiological release from a Nuclear Power Plant (NPP). These findings have led to significant enhancements being made to MACCS. Currently, work is being conducted using these tools to model the offsite health consequences for atmospheric releases of radioactive material for Level 3 Probabilistic Risk Assessment (PRA). These advanced capabilities allow for realistic treatment of the implementation of protective actions from both offsite response organizations (OROs) and the public. JF - Transactions of the American Nuclear Society AU - Walton, Fotini AD - Sandia National Laboratories: 1515 Eubank SE, Albuquerque, NM, 87123-0748 fwalton@sandia.gov Y1 - 2014 PY - 2014 DA - 2014 SP - 934 EP - 935 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Energy use KW - Nuclear power plants KW - Evacuation KW - Regulatory agencies KW - Probabilistic risk assessment KW - Energy (nuclear) KW - Strategy KW - Protective UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692321830?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Modeling+Protective+Action+Strategies+Using+MACCS&rft.au=Walton%2C+Fotini&rft.aulast=Walton&rft.aufirst=Fotini&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=934&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - Consequences of Degraded Containment in a Severe Nuclear Power Plant Accident AN - 1692304138; PQ0001263189 AB - The most common form of containment for nuclear power plants in the USA comprises a steel-lined concrete structure [1], in which the concrete and steel have a symbiotic relationship. The reinforced or pre-stressed concrete structure resists internal or external loading while the steel liner provides a leak-tight barrier to contain radionuclides in the event of an accident. If the liner has a pre-existing breach and a severe accident subsequently occurs, the concrete will contain the accident pressure until tensile cracks begin to form and release the internal pressure. Such liner degradation has been observed in plant inspections [2]. This paper examines a simple crack formation scheme added to a station blackout model, and compares the estimated radionuclide releases. JF - Transactions of the American Nuclear Society AU - Jankovsky, Zachary AU - Jones, Christopher AU - Kalinich, Donald AD - Sandia National Laboratories, 1515 Eubank Blvd. SE, Albuquerque, New Mexico, 87123 jankovsky.3@osu.edu Y1 - 2014 PY - 2014 DA - 2014 SP - 982 EP - 985 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear power plants KW - Nuclear power generation KW - Accidents KW - Degradation KW - Cracks KW - Containment KW - Accidental release KW - Liners UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692304138?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Consequences+of+Degraded+Containment+in+a+Severe+Nuclear+Power+Plant+Accident&rft.au=Jankovsky%2C+Zachary%3BJones%2C+Christopher%3BKalinich%2C+Donald&rft.aulast=Jankovsky&rft.aufirst=Zachary&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=982&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-12-07 ER - TY - JOUR T1 - Fire, Seismic, and other Ex-Process Events and Criticality Safety Risk Acceptance AN - 1692300370; PQ0001263156 AB - When scope is limited to a process alone it is a relatively straightforward task to predict and evaluate the effect of changes in process conditions. This is generally true because there are relatively few changes in process conditions that can affect two (let alone more than two) process parameters at the same time. JF - Transactions of the American Nuclear Society AU - Monahan, Shean P AU - McLaughlin, T P AU - Mitchell, Mark V AU - Hayes, D K AD - Nuclear Security Enterprise Integration, Organization 0261, Sandia National Laboratories P.O. Box 5800 MS 0431, Albuquerque, NM, 87185 USA Y1 - 2014 PY - 2014 DA - 2014 SP - 854 EP - 856 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Earthquake Engineering Abstracts (EQ); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Fires KW - Process parameters KW - Acceptance KW - Nuclear safety KW - Tasks KW - Risk acceptance KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692300370?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Fire%2C+Seismic%2C+and+other+Ex-Process+Events+and+Criticality+Safety+Risk+Acceptance&rft.au=Monahan%2C+Shean+P%3BMcLaughlin%2C+T+P%3BMitchell%2C+Mark+V%3BHayes%2C+D+K&rft.aulast=Monahan&rft.aufirst=Shean&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=854&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - Safeguards and Security Integration for Fuel Cycle Facilities AN - 1692300329; PQ0001263200 AB - Safety, Security, and Safeguards by Design (3SBD) for nuclear facilities has in the past been discussed with the intention of developing a fully integrated plant monitoring system. However, full integration is not necessary and could lead to problems associated with data overload. Instead, 3SBD can be achieved by maintaining separate systems that share only pertinent information to improve overall plant monitoring. This work examines one aspect of 3SBD, the integration of domestic safeguards and security in reprocessing plants though sharing of accountancy data with the physical protection system (PPS). This work has shown an increase in the potential response force effectiveness through timely sharing of safeguards data that may indicate material loss. JF - Transactions of the American Nuclear Society AU - Cipiti, Benjamin B AU - Parks, M Jordan AU - Duran, Felicia A AD - Sandia National Laboratories, PO Box 5800 MS 0747, Albuquerque, NM 87185-0747 Y1 - 2014 PY - 2014 DA - 2014 SP - 1023 EP - 1024 PB - American Nuclear Society, Inc. VL - 111 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Security KW - Plant monitoring KW - Nuclear safety KW - Domestic KW - Computer information security KW - Reprocessing KW - Protection systems KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692300329?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Safeguards+and+Security+Integration+for+Fuel+Cycle+Facilities&rft.au=Cipiti%2C+Benjamin+B%3BParks%2C+M+Jordan%3BDuran%2C+Felicia+A&rft.aulast=Cipiti&rft.aufirst=Benjamin&rft.date=2014-01-01&rft.volume=111&rft.issue=&rft.spage=1023&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2015-07-01 ER - TY - JOUR T1 - Hydrogeology of deep borehole disposal for high-level radioactive waste AN - 1664439118; 2015-024035 AB - Deep borehole disposal of high-level radioactive waste and spent nuclear fuel is under consideration as a potential alternative to shallower mined repository options. The disposal concept consists of drilling a borehole into crystalline basement rocks to a depth of 5 km, emplacement of canisters containing solid waste in the lower 2 km, and sealing the upper 3 km of the borehole. A number of factors suggest that deep borehole disposal is viable and safe, including large areas in stable continental regions with depths to crystalline basement of less than 2 km, availability of adequate drilling technology, low bulk permeability and high salinity in deep crystalline rocks, and geochemically reducing conditions, which limit the solubility and mobility of many radionuclides. Indications are that groundwater in the tectonically stable, deep crystalline basement is very old, has a long history of chemical interaction with the rock matrix, and is unlikely to interact with shallower groundwater resources at many locations. Such indications of hydrogeological isolation are critical to establishing the safety of deep borehole disposal; however, data on bulk permeability, hydrochemistry, groundwater age and fluid history in crystalline rocks at depths of several kilometers is limited. A deep borehole disposal research, development, and demonstration project is planned by the U.S. Department of Energy to address scientific questions in the deep subsurface related to disposal safety and to demonstrate engineering operations of a deep borehole disposal system. Groundwater age, history, and fluid flux can be constrained with multiple environmental tracers, such as radiogenic isotopes of noble gases. Data on groundwater salinity and geochemistry are important in evaluating the stability of density-stratified fluids and predicting waste package corrosion, waste form degradation, and chemical interactions with borehole seals. Potentially overpressured conditions and permeability of the disturbed rock zone near the borehole can be evaluated with shut-in pressure measurements and hydraulic testing. Chemical and mineralogical alteration of borehole seals material can be determined using laboratory testing. JF - Abstracts with Programs - Geological Society of America AU - Arnold, Bill W AU - Gardner, W Payton AU - Brady, Patrick V AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 369 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664439118?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Hydrogeology+of+deep+borehole+disposal+for+high-level+radioactive+waste&rft.au=Arnold%2C+Bill+W%3BGardner%2C+W+Payton%3BBrady%2C+Patrick+V%3BAnonymous&rft.aulast=Arnold&rft.aufirst=Bill&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=369&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2014 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-03-19 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Geologic controls on subsurface mechanical and hydrologic properties; implications for seal failure and induced seismicity AN - 1656039321; 2015-016076 AB - Deep injection of large volumes of disposal fluids and CO (sub 2) injection schemes focuses on a suite of rocks that have been overlooked, and place attention on the integration of hydrogeology, geomechanics, and subsurface structural geology as never before. Uncertainty regarding the strength and mode of failure of reservoirs and the potential for seismicity and seal failure is significantly reduced by combining geologic analyses, rock mechanics, and hydromechanical modeling. W argue that such systems are tractable, and Hintzman et al. (2012) suggest maintaining a fluid volume balance (injection=withdrawal) is one of the most effective means of reducing the risk of induced seismicity. Basal reservoir injection promotes downward propagation of elevated fluid pressures into the crystalline basement where large, damaging earthquakes occur. Experimental analyses of fine-grained clastic rocks, representative of unconventional reservoir and seals, reveal that siltstones exhibit a range of tensile and uniaxial compressive strengths. Coupled with variation in coefficients of friction this results in a range of failure envelopes that predict mode I, hybrid shear, and shear failure within a stratigraphic sequence, confirmed by field observation. Analyses of sedimentary interfacial seals reveal a range of structural and sedimentary features that affect caprock integrity, provide short circuits for fluid flow (seal-bypass) and influencing the propagation of fractures across interfaces. Coupled numerical hydrogeomechanical models incorporate experimental and field derived fluid flow properties and structure of faulted sedimentary-basement sequences will hind cast induced seismic events may provide insights to the factors controlling induced seismicity, and provide information on the permeability structure of the crystalline basement and potential for seal failure. The "frac gradient" analysis of the response of the subsurface around the few high P and Q deep injectors does not capture this behavior. Integrated analyses of the pressure changes up to 10-20 km from a wellbore together with sedimentological and structural heterogeneity in the subsurface provides a more a robust method to enhance insights into seismic and environmental safety considerations and addresses economic and societal demands. JF - Abstracts with Programs - Geological Society of America AU - Evans, James P AU - Petrie, Elizabeth S AU - Person, Mark AU - Bauer, Stephen AU - Mozley, Peter S AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 230 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 6 SN - 0016-7592, 0016-7592 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656039321?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Geologic+controls+on+subsurface+mechanical+and+hydrologic+properties%3B+implications+for+seal+failure+and+induced+seismicity&rft.au=Evans%2C+James+P%3BPetrie%2C+Elizabeth+S%3BPerson%2C+Mark%3BBauer%2C+Stephen%3BMozley%2C+Peter+S%3BAnonymous&rft.aulast=Evans&rft.aufirst=James&rft.date=2014-01-01&rft.volume=46&rft.issue=6&rft.spage=230&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2014 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-02-19 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Experimental and thermodynamic modeling solubility of lead in the carbonate system to high ionic strengths AN - 1656034661; 2015-015343 JF - V.M. Goldschmidt Conference - Program and Abstracts AU - Xiong, Yongliang AU - Kirkes, Leslie AU - Westfall, Terry AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 2751 PB - Goldschmidt Conference, [varies] VL - 24 SN - 1042-7287, 1042-7287 KW - United States KW - experimental studies KW - Eddy County New Mexico KW - Paleozoic KW - lead KW - New Mexico KW - EQ3/6 KW - solubility KW - Permian KW - ions KW - radioactive waste KW - models KW - Upper Permian KW - ligands KW - metals KW - brines KW - Waste Isolation Pilot Plant KW - waste disposal KW - thermodynamic properties KW - southeastern New Mexico KW - Salado Formation KW - Castile Formation KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656034661?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.atitle=Experimental+and+thermodynamic+modeling+solubility+of+lead+in+the+carbonate+system+to+high+ionic+strengths&rft.au=Xiong%2C+Yongliang%3BKirkes%2C+Leslie%3BWestfall%2C+Terry%3BAnonymous&rft.aulast=Xiong&rft.aufirst=Yongliang&rft.date=2014-01-01&rft.volume=24&rft.issue=&rft.spage=2751&rft.isbn=&rft.btitle=&rft.title=V.M.+Goldschmidt+Conference+-+Program+and+Abstracts&rft.issn=10427287&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2014 N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 2 N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - brines; Castile Formation; Eddy County New Mexico; EQ3/6; experimental studies; ions; lead; ligands; metals; models; New Mexico; Paleozoic; Permian; radioactive waste; Salado Formation; solubility; southeastern New Mexico; thermodynamic properties; United States; Upper Permian; waste disposal; Waste Isolation Pilot Plant ER - TY - JOUR T1 - Lunar basin-forming projectiles AN - 1648907987; 2015-010732 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Schultz, P H AU - Crawford, D AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 EP - Abstract 1961 PB - Lunar and Planetary Science Conference, Houston, TX VL - 45 KW - cratering KW - asteroids KW - igneous rocks KW - simulation KW - iron KW - plutonic rocks KW - oblique orientation KW - basins KW - Mare Nectaris KW - dunite KW - Mare Moscoviense KW - numerical models KW - projectiles KW - Moon KW - Schrodinger Crater KW - Mare Orientale KW - differentiation KW - trajectories KW - impacts KW - ring structures KW - ejecta KW - anorthosite KW - ultramafics KW - size KW - Mare Imbrium KW - metals KW - lunar crust KW - peridotites KW - core KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648907987?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Lunar+basin-forming+projectiles&rft.au=Schultz%2C+P+H%3BCrawford%2C+D%3BAnonymous&rft.aulast=Schultz&rft.aufirst=P&rft.date=2014-01-01&rft.volume=45&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2014/pdf/1961.pdf LA - English DB - GeoRef N1 - Conference title - 45th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Number of references - 15 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Aug. 4, 2014 N1 - Last updated - 2015-01-29 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - anorthosite; asteroids; basins; core; cratering; differentiation; dunite; ejecta; igneous rocks; impacts; iron; lunar crust; Mare Imbrium; Mare Moscoviense; Mare Nectaris; Mare Orientale; metals; Moon; numerical models; oblique orientation; peridotites; plutonic rocks; projectiles; ring structures; Schrodinger Crater; simulation; size; trajectories; ultramafics ER - TY - JOUR T1 - Carbon dioxide as a control on competition between iron- and sulfate-reducing microorganisms AN - 1648906104; 2015-009467 AB - Understanding controls on competition between iron and sulfate-reducing microorganisms is important because they are widespread and strongly influence the biogeochemistry of aqueous systems. Here we examine CO (sub 2) as a control on competition between each group using semi-continuous bioreactors inoculated with a mixed-microbial community from a freshwater aquifer. We performed two sets of experiments: one with low CO (sub 2) partial pressure ( approximately 0.02 atm) in the headspace of the reactors and one with high CO (sub 2) partial pressure ( approximately 1 atm). The aqueous medium consisted of groundwater amended with small amounts of acetate (250 mu M), phosphate (1 mu M), and ammonium (50 mu M) to stimulate microbial activity. Each reactor was also supplied with synthetic goethite (1 mmol) and sulfate (500 mu M influent concentration), electron acceptors for iron and sulfate reducers, respectively. Our results demonstrate that iron reducers were better able to compete with sulfate reducers in reactors with high CO (sub 2) content. Mass-balance calculations and pyrosequencing results show that sulfate reducers were dominant in reactors with low CO (sub 2) content. They consumed 85% of the acetate after acetate consumption stabilized while iron reducers consumed only 15% on average. In contrast, iron reducers were dominant during that same interval in reactors with high CO (sub 2) content, consuming at least 90% of the acetate while sulfate reducers consumed a negligible amount (<1%). Thermodynamic calculations suggest that this shift in microbial activity occurred in response to differences in the free energy yield of iron reduction between reactors. Additional research is currently being conducted to examine this possible mechanism in more detail. This material is based upon work supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - Abstracts with Programs - Geological Society of America AU - Kirk, Matthew F AU - Sanford, Robert A AU - Santillan, Eugenio F U AU - Altman, Susan J AU - Jin, Qusheng AU - Anonymous Y1 - 2014 PY - 2014 DA - 2014 SP - 8 PB - Geological Society of America (GSA), Boulder, CO VL - 46 IS - 4 SN - 0016-7592, 0016-7592 KW - 02B:Hydrochemistry KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648906104?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Carbon+dioxide+as+a+control+on+competition+between+iron-+and+sulfate-reducing+microorganisms&rft.au=Kirk%2C+Matthew+F%3BSanford%2C+Robert+A%3BSantillan%2C+Eugenio+F+U%3BAltman%2C+Susan+J%3BJin%2C+Qusheng%3BAnonymous&rft.aulast=Kirk&rft.aufirst=Matthew&rft.date=2014-01-01&rft.volume=46&rft.issue=4&rft.spage=8&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2014NC/webprogram/Paper236788.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, North-Central Section, 48th annual meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2015-01-01 N1 - PubXState - CO N1 - Last updated - 2015-01-29 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - A method for analysis of linear dynamic systems driven by stationary non-Gaussian noise with applications to turbulence-induced random vibration AN - 1547865514; 19979044 AB - A method is developed for approximating the properties of the state of a linear dynamic system driven by a broad class of non-Gaussian noise, namely, by polynomials of filtered Gaussian processes. The method involves four steps. First, the mean and correlation functions of the state of the system are calculated from those of the input noise. Second, higher order moments of the state are calculated based on Ito's formula for continuous semimartingales. It is shown that equations governing these moments are closed, so that moment of any order of the state can be calculated exactly. Third, a conceptually simple technique, which resembles the Galerkin method for solving differential equations, is proposed for constructing approximations for the marginal distribution of the state from its moments. Fourth, translation models are calibrated to representations of the marginal distributions of the state as well as its second moment properties. The resulting models can then be utilized to estimate properties of the state, such as the mean rate at which the state exits a safe set. The implementation of the proposed method is demonstrated by numerous examples, including the turbulence-induced random vibration of a flexible plate. JF - Applied Mathematical Modelling AU - Grigoriu, M AU - Field, R V, Jr AD - Cornell University, Ithaca, NY 14853, USA, rvfield@sandia.gov Y1 - 2014/01/01/ PY - 2014 DA - 2014 Jan 01 SP - 336 EP - 354 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 38 IS - 1 SN - 0307-904X, 0307-904X KW - Meteorological & Geoastrophysical Abstracts; Pollution Abstracts KW - Non-Caussian models KW - Random vibration KW - Stochastic processes KW - Turbulence KW - Vibration KW - Acoustic waves KW - Noise levels KW - Correlation function KW - Noise pollution KW - P 7000:NOISE KW - M2 551.511:Mechanics and Thermodynamics of the Atmosphere (551.511) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1547865514?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Mathematical+Modelling&rft.atitle=A+method+for+analysis+of+linear+dynamic+systems+driven+by+stationary+non-Gaussian+noise+with+applications+to+turbulence-induced+random+vibration&rft.au=Grigoriu%2C+M%3BField%2C+R+V%2C+Jr&rft.aulast=Grigoriu&rft.aufirst=M&rft.date=2014-01-01&rft.volume=38&rft.issue=1&rft.spage=336&rft.isbn=&rft.btitle=&rft.title=Applied+Mathematical+Modelling&rft.issn=0307904X&rft_id=info:doi/10.1016%2Fj.apm.2013.05.055 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-07-01 N1 - Number of references - 36 N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - Acoustic waves; Correlation function; Noise pollution; Vibration; Noise levels DO - http://dx.doi.org/10.1016/j.apm.2013.05.055 ER - TY - JOUR T1 - Evaluating the performance of parallel subsurface simulators; an illustrative example with PFLOTRAN AN - 1545407853; 2014-055236 AB - To better inform the subsurface scientist on the expected performance of parallel simulators, this work investigates performance of the reactive multiphase flow and multicomponent biogeochemical transport code PFLOTRAN as it is applied to several realistic modeling scenarios run on the Jaguar supercomputer. After a brief introduction to the code's parallel layout and code design, PFLOTRAN's parallel performance (measured through strong and weak scalability analyses) is evaluated in the context of conceptual model layout, software and algorithmic design, and known hardware limitations. PFLOTRAN scales well (with regard to strong scaling) for three realistic problem scenarios: (1) in situ leaching of copper from a mineral ore deposit within a 5-spot flow regime, (2) transient flow and solute transport within a regional doublet, and (3) a real-world problem involving uranium surface complexation within a heterogeneous and extremely dynamic variably saturated flow field. Weak scalability is discussed in detail for the regional doublet problem, and several difficulties with its interpretation are noted. Abstract Copyright (2013), . The Authors. Water Resources Research published by Wiley on behalf of the American Geophysical Union. JF - Water Resources Research AU - Hammond, G E AU - Lichtner, P C AU - Mills, R T Y1 - 2014/01// PY - 2014 DA - January 2014 SP - 208 EP - 228 PB - American Geophysical Union, Washington, DC VL - 50 IS - 1 SN - 0043-1397, 0043-1397 KW - solute transport KW - PFLOTRAN KW - numerical models KW - complexing KW - data processing KW - ground water KW - computer programs KW - computers KW - biogenic processes KW - transport KW - metals KW - mathematical methods KW - digital simulation KW - multiphase flow KW - reactive transport KW - uranium KW - algorithms KW - actinides KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545407853?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Evaluating+the+performance+of+parallel+subsurface+simulators%3B+an+illustrative+example+with+PFLOTRAN&rft.au=Hammond%2C+G+E%3BLichtner%2C+P+C%3BMills%2C+R+T&rft.aulast=Hammond&rft.aufirst=G&rft.date=2014-01-01&rft.volume=50&rft.issue=1&rft.spage=208&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2012WR013483 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 58 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-07-17 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - actinides; algorithms; biogenic processes; complexing; computer programs; computers; data processing; digital simulation; ground water; mathematical methods; metals; multiphase flow; numerical models; PFLOTRAN; reactive transport; solute transport; transport; uranium DO - http://dx.doi.org/10.1002/2012WR013483 ER - TY - JOUR T1 - Development of a native Escherichia coli induction system for ionic liquid tolerance. AN - 1542651005; 24983352 AB - The ability to solubilize lignocellulose makes certain ionic liquids (ILs) very effective reagents for pretreating biomass prior to its saccharification for biofuel fermentation. However, residual IL in the aqueous sugar solution can inhibit the growth and function of biofuel-producing microorganisms. In E. coli this toxicity can be partially overcome by the heterologous expression of an IL efflux pump encoded by eilA from Enterobacter lignolyticus. In the present work, we used microarray analysis to identify native E. coli IL-inducible promoters and develop control systems for regulating eilA gene expression. Three candidate promoters, PmarR', PydfO', and PydfA', were selected and compared to the IPTG-inducible PlacUV5 system for controlling expression of eilA. The PydfA' and PmarR' based systems are as effective as PlacUV5 in their ability to rescue E. coli from typically toxic levels of IL, thereby eliminating the need to use an IPTG-based system for such tolerance engineering. We present a mechanistic model indicating that inducible control systems reduce target gene expression when IL levels are low. Selected-reaction monitoring mass spectrometry analysis revealed that at high IL concentrations EilA protein levels were significantly elevated under the control of PydfA' and PmarR' in comparison to the other promoters. Further, in a pooled culture competition designed to determine fitness, the strain containing pPmarR'-eilA outcompeted strains with other promoter constructs, most significantly at IL concentrations above 150 mM. These results indicate that native promoters such as PmarR' can provide effective systems for regulating the expression of heterologous genes in host engineering and simplify the development of industrially useful strains. JF - PloS one AU - Frederix, Marijke AU - Hütter, Kimmo AU - Leu, Jessica AU - Batth, Tanveer S AU - Turner, William J AU - Rüegg, Thomas L AU - Blanch, Harvey W AU - Simmons, Blake A AU - Adams, Paul D AU - Keasling, Jay D AU - Thelen, Michael P AU - Dunlop, Mary J AU - Petzold, Christopher J AU - Mukhopadhyay, Aindrila AD - Joint BioEnergy Institute, Emeryville, California, United States of America; Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, United States of America. ; School of Engineering, University of Vermont, Burlington, Vermont, United States of America. ; Joint BioEnergy Institute, Emeryville, California, United States of America; Botanical Institute, University of Basel, Basel, Switzerland; Biology and Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, United States of America. ; Joint BioEnergy Institute, Emeryville, California, United States of America; Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, United States of America; Department of Chemistry, College of Chemistry, University of California, Berkeley, California, United States of America. ; Joint BioEnergy Institute, Emeryville, California, United States of America; Biological and Materials Science Center, Sandia National Laboratories, Livermore, California, United States of America. ; Joint BioEnergy Institute, Emeryville, California, United States of America; Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, United States of America; Department of Chemistry, College of Chemistry, University of California, Berkeley, California, United States of America; Department of Chemical & Biomolecular Engineering, College of Chemistry, University of California, Berkeley, California, United States of America. ; Joint BioEnergy Institute, Emeryville, California, United States of America; Biology and Biotechnology Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, United States of America. Y1 - 2014 PY - 2014 DA - 2014 SP - 1 VL - 9 IS - 7 KW - EilA protein, E coli KW - 0 KW - Escherichia coli Proteins KW - Ionic Liquids KW - RNA, Bacterial KW - Index Medicus KW - Promoter Regions, Genetic KW - RNA, Bacterial -- genetics KW - Transcriptome KW - Escherichia coli Proteins -- genetics KW - Ionic Liquids -- pharmacology KW - Escherichia coli -- drug effects KW - Escherichia coli -- genetics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542651005?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=PloS+one&rft.atitle=Development+of+a+native+Escherichia+coli+induction+system+for+ionic+liquid+tolerance.&rft.au=Frederix%2C+Marijke%3BH%C3%BCtter%2C+Kimmo%3BLeu%2C+Jessica%3BBatth%2C+Tanveer+S%3BTurner%2C+William+J%3BR%C3%BCegg%2C+Thomas+L%3BBlanch%2C+Harvey+W%3BSimmons%2C+Blake+A%3BAdams%2C+Paul+D%3BKeasling%2C+Jay+D%3BThelen%2C+Michael+P%3BDunlop%2C+Mary+J%3BPetzold%2C+Christopher+J%3BMukhopadhyay%2C+Aindrila&rft.aulast=Frederix&rft.aufirst=Marijke&rft.date=2014-01-01&rft.volume=9&rft.issue=7&rft.spage=e101115&rft.isbn=&rft.btitle=&rft.title=PloS+one&rft.issn=1932-6203&rft_id=info:doi/10.1371%2Fjournal.pone.0101115 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2015-12-03 N1 - Date created - 2014-07-02 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Mol Gen Genet. 1999 Sep;262(2):342-50 [10517331] J Bacteriol. 1997 Oct;179(19):6122-6 [9324261] Curr Issues Mol Biol. 2006 Jan;8(1):51-62 [16450885] Nat Methods. 2006 Aug;3(8):623-8 [16862137] Mol Cell Proteomics. 2007 Sep;6(9):1527-50 [17446557] J Hazard Mater. 2008 Feb 28;151(1):268-73 [18063302] J Mol Biol. 2008 Mar 28;377(3):655-67 [18272181] Biotechnol Bioeng. 2009 Sep 1;104(1):68-75 [19489027] PLoS One. 2009;4(7):e6441 [19649325] BMC Biotechnol. 2009;9:97 [19939278] Cell. 2010 Jan 8;140(1):19-23 [20085699] Water Res. 2010 Jan;44(2):352-72 [19854462] Bioinformatics. 2010 Apr 1;26(7):966-8 [20147306] Appl Microbiol Biotechnol. 2010 Jun;87(1):117-26 [20182710] Bioresour Technol. 2010 Dec;101(23):8923-30 [20667722] J Bacteriol. 2010 Sep;192(18):4786-9 [20639340] Nat Struct Mol Biol. 2011 Mar;18(3):262-9 [21317898] Metab Eng. 2011 Mar;13(2):194-203 [21215324] Nat Commun. 2010;1:147 [21266997] Biotechnol Bioeng. 2011 Jun;108(6):1229-45 [21337342] Mol Syst Biol. 2011 May 10;7:487 [21556065] BMC Mol Biol. 2011;12:18 [21513543] Proc Natl Acad Sci U S A. 2012 Aug 7;109(32):E2173-82 [22586090] Nat Biotechnol. 2013 Nov;31(11):1039-46 [24142050] Nat Commun. 2014;5:3490 [24667370] J Bacteriol. 2000 Jun;182(12):3467-74 [10852879] Semin Cell Dev Biol. 2001 Jun;12(3):225-37 [11428915] Methods. 2001 Dec;25(4):402-8 [11846609] Mol Microbiol. 2002 Jun;44(6):1611-24 [12067348] J Mol Biol. 1991 Jul 5;220(1):35-48 [1712397] J Biol Chem. 1992 Dec 5;267(34):24253-8 [1447175] J Bacteriol. 1995 May;177(9):2305-14 [7730258] Bioresour Technol. 2005 Dec;96(18):2026-32 [16112491] N1 - Last updated - 2017-02-23 DO - http://dx.doi.org/10.1371/journal.pone.0101115 ER - TY - JOUR T1 - Thermal and collisional history of Tishomingo iron meteorite; more evidence for early disruption of differentiated planetesimals AN - 1510396653; 2014-021646 AB - Tishomingo is a chemically and structurally unique iron with 32.5 wt.% Ni that contains 20% residual taenite and 80% martensite plates, which formed on cooling to between -75 and -200 degrees C, probably the lowest temperature recorded by any meteorite. Our studies using transmission (TEM) and scanning electron microscopy (SEM), X-ray microanalysis (AEM) and electron backscatter diffraction (EBSD) show that martensite plates in Tishomingo formed in a single crystal of taenite and decomposed during reheating forming 10-100 nm taenite particles with approximately 50 wt.% Ni, kamacite with approximately 4 wt.%Ni, along with martensite or taenite with 32 wt.% Ni. EBSD data and experimental constraints show that Tishomingo was reheated to 320-400 degrees C for about a year transforming some martensite to kamacite and to taenite particles and some martensite directly to taenite without composition change. Fizzy-textured intergrowths of troilite, kamacite with 2.7 wt.% Ni and 2.6 wt.% Co, and taenite with 56 wt.% Ni and 0.15 wt.% Co formed by localized shock melting. A single impact probably melted the sub-mm sulfides, formed stishovite, and reheated and decomposed the martensite plates. Tishomingo and its near-twin Willow Grove, which has 28 wt.% Ni, differ from IAB-related irons like Santa Catharina and San Cristobal that contain 25-36 wt.% Ni, as they are highly depleted in moderately volatile siderophiles and enriched in Ir and other refractory elements. Tishomingo and Willow Grove therefore resemble IVB irons but are chemically distinct. The absence of cloudy taenite in these two irons shows that they cooled through 250 degrees C abnormally fast at >0.01 degrees C/yr. Thus this grouplet, like the IVA and IVB irons, suffered an early impact that disrupted their parent body when it was still hot. Our noble gas data show that Tishomingo was excavated from its parent body about 100 to 200 Myr ago and exposed to cosmic rays as a meteoroid with a radius of approximately 50-85 cm. Abstract Copyright (2014) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Yang, Jijin AU - Goldstein, Joseph I AU - Scott, Edward R D AU - Michael, Joseph R AU - Kotula, Paul G AU - Grimberg, Ansgar AU - Leya, Ingo Y1 - 2014/01/01/ PY - 2014 DA - 2014 Jan 01 SP - 34 EP - 53 PB - Elsevier, New York, NY VL - 124 SN - 0016-7037, 0016-7037 KW - experimental studies KW - accretion KW - textures KW - parent bodies KW - differentiation KW - martensite KW - crystal growth KW - cosmochemistry KW - Santa Catharina Meteorite KW - kamacite KW - San Cristobal Meteorite KW - planetesimals KW - thermal history KW - TEM data KW - meteorites KW - Tishomingo Meteorite KW - X-ray data KW - mineral composition KW - taenite KW - iron meteorites KW - alloys KW - chemical composition KW - SEM data KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510396653?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Thermal+and+collisional+history+of+Tishomingo+iron+meteorite%3B+more+evidence+for+early+disruption+of+differentiated+planetesimals&rft.au=Yang%2C+Jijin%3BGoldstein%2C+Joseph+I%3BScott%2C+Edward+R+D%3BMichael%2C+Joseph+R%3BKotula%2C+Paul+G%3BGrimberg%2C+Ansgar%3BLeya%2C+Ingo&rft.aulast=Yang&rft.aufirst=Jijin&rft.date=2014-01-01&rft.volume=124&rft.issue=&rft.spage=34&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2013.09.023 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 32 N1 - PubXState - NY N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2014-03-27 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - accretion; alloys; chemical composition; cosmochemistry; crystal growth; differentiation; experimental studies; iron meteorites; kamacite; martensite; meteorites; mineral composition; parent bodies; planetesimals; San Cristobal Meteorite; Santa Catharina Meteorite; SEM data; taenite; TEM data; textures; thermal history; Tishomingo Meteorite; X-ray data DO - http://dx.doi.org/10.1016/j.gca.2013.09.023 ER - TY - JOUR T1 - Proceedings of the National Academy of Sciences of the United States of America AN - 1849300396; 2016-104832 JF - Proceedings of the National Academy of Sciences of the United States of America AU - Bosolugh, Mark Y1 - 2013/12/24/ PY - 2013 DA - 2013 Dec 24 SP - 1 PB - National Academy of Sciences, Washington, DC VL - 110 IS - 52 SN - 0027-8424, 0027-8424 KW - Cape York Meteorite KW - West Greenland KW - GISP2 KW - platinum group KW - paleoclimatology KW - iridium KW - climate change KW - upper Pleistocene KW - fires KW - Cenozoic KW - upper Weichselian KW - meteorites KW - Greenland KW - Weichselian KW - iron meteorites KW - Clovis KW - geochemical anomalies KW - Younger Dryas KW - ice cores KW - Quaternary KW - Arctic region KW - impacts KW - abrupt climate change KW - platinum KW - metals KW - Pleistocene KW - stratigraphic boundary KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849300396?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.atitle=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.au=Bosolugh%2C+Mark&rft.aulast=Bosolugh&rft.aufirst=Mark&rft.date=2013-12-24&rft.volume=110&rft.issue=52&rft.spage=E5035&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.issn=00278424&rft_id=info:doi/10.1073%2Fpnas.1320328111 L2 - http://www.pnas.org/content/by/year LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 5 N1 - PubXState - DC N1 - SuppNotes - For reference to original see Petaev, M. I., et. al., 2013, Proceedings of the National Academy of Sciences of the United States of America, Vol. 110, No. 32, p. 12917-12920, DOI: 10.1073/pnas.1303924110 N1 - Last updated - 2016-12-16 N1 - CODEN - PNASA6 N1 - SubjectsTermNotLitGenreText - abrupt climate change; Arctic region; Cape York Meteorite; Cenozoic; climate change; Clovis; fires; geochemical anomalies; GISP2; Greenland; ice cores; impacts; iridium; iron meteorites; metals; meteorites; paleoclimatology; platinum; platinum group; Pleistocene; Quaternary; stratigraphic boundary; upper Pleistocene; upper Weichselian; Weichselian; West Greenland; Younger Dryas DO - http://dx.doi.org/10.1073/pnas.1320328111 ER - TY - JOUR T1 - WO3-enhanced TiO2 nanotube photoanodes for solar water splitting with simultaneous wastewater treatment. AN - 1467636708; 24195676 AB - Composite WO3/TiO2 nanostructures with optimal properties that enhance solar photoconversion reactions were developed, characterized, and tested. The TiO2 nanotubes were prepared by anodization of Ti foil and used as substrates for WO3 electrodeposition. The WO3 electrodeposition parameters were controlled to develop unique WO3 nanostructures with enhanced photoelectrochemical properties. Scanning electron microscopy (SEM) images showed that the nanomaterials with optimal photocurrent density have the same ordered structure as TiO2 nanotubes, with an external tubular nanostructured WO3 layer. Diffuse reflectance spectra showed an increase in the visible absorption relative to bare TiO2 nanotubes and in the UV absorption relative to bare WO3 films. Incident simulated solar photon-to-current efficiency (IPCE) increased from 30% (for bare WO3) to 50% (for tubular WO3/TiO2 composites). With the addition of diverse organic pollutants, the photocurrent densities exhibited more than a 5-fold increase. Chemical oxygen demand measurements showed the simultaneous photodegradation of organic pollutants. The results of this work showed that the unique structure and composition of these composite WO3/TiO2 materials enhance the IPCE efficiencies, optical properties, and photodegradation performance compared with the parent materials. JF - ACS applied materials & interfaces AU - Reyes-Gil, Karla R AU - Robinson, David B AD - Sandia National Laboratories , P.O. Box 969, Livermore, California 94551-MS9403, United States. Y1 - 2013/12/11/ PY - 2013 DA - 2013 Dec 11 SP - 12400 EP - 12410 VL - 5 IS - 23 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1467636708?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+applied+materials+%26+interfaces&rft.atitle=WO3-enhanced+TiO2+nanotube+photoanodes+for+solar+water+splitting+with+simultaneous+wastewater+treatment.&rft.au=Reyes-Gil%2C+Karla+R%3BRobinson%2C+David+B&rft.aulast=Reyes-Gil&rft.aufirst=Karla&rft.date=2013-12-11&rft.volume=5&rft.issue=23&rft.spage=12400&rft.isbn=&rft.btitle=&rft.title=ACS+applied+materials+%26+interfaces&rft.issn=1944-8252&rft_id=info:doi/10.1021%2Fam403369p LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2014-07-23 N1 - Date created - 2013-12-11 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1021/am403369p ER - TY - JOUR T1 - Using the international monitoring system to validate SALSA3D; a global 3D P-velocity model of the crust and mantle for improved seismic event location AN - 1707526129; 2015-080599 AB - We demonstrate the ability of SALSA3D (SAndia LoS Alamos 3D) version 2.1, a global 3D P-wave velocity model of the Earth's crust and mantle, to reduce mislocations compared to those derived from standard 1D and 2-2.5D models, for a set of realizations using only IMS stations - an example of a sparse network whose locations depend heavily on the velocity model employed - and a carefully chosen group of globally-distributed ground truth (GT) events. Our model is derived from the latest version of the GT catalog of P/Pn travel-time picks assembled by Los Alamos National Laboratory. The model uses the GeoTess triangular tessellation system described by Ballard et al. (2009; www.sandia.gov/geotess), which incorporates variable resolution both laterally and radially. For our starting model, we use a simplified version of the NNSA Unified model in Eurasia and the Crust 2.0 model elsewhere. Damping reduces velocity adjustments so that ray path changes between iterations are small. We obtain proper model smoothness via progressive grid refinement using the diagonal of the model resolution matrix to determine where the data warrant such a refinement. Our approach provides more consistent and continuous areas of refinement, producing a smooth, multi-resolution model with node density appropriate to both ray coverage and the velocity gradients required by the data. This scheme is computationally expensive, so we use a distributed computing framework of nearly equal 400 processors. The global IMS network consists of approximately 150 primary and auxiliary stations, forming a pre-defined, sparse network with which to locate seismic events. We compare the travel-time prediction and location capabilities of SALSA3D to standard 1D and 2/2.5D models via location tests on a global event set with GT of 5 km or better. Using Pn and P picks from IMS stations only, we generate different realizations of station distributions, yielding a range of azimuthal coverage and ratios of teleseismic to regional arrivals, with which we test the accuracy and precision of relocation. We test using the full 3D covariance matrix of the current model to calculate path-dependent travel time uncertainty, rather than applying standard, 1D, distance-dependent uncertainty. SALSA3D reduces mislocation over the standard 1D ak135 model regardless of Pn to P ratio, with the most pronounced improvement at higher azimuthal gaps. SALSA3D also reduces mislocation compared to the combined RSTT/ak135 model (2.5D - RSTT for regional phases), with minimal improvement over RSTT when only regional Pn phases are used to compute locations. JF - American Geophysical Union Fall Meeting AU - Begnaud, M L AU - Ballard, S AU - Young, C J AU - Hipp, J R AU - Encarnacao, A AU - Phillips, W AU - Chael, E P AU - Rowe, C A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S21B EP - 2392 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707526129?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Using+the+international+monitoring+system+to+validate+SALSA3D%3B+a+global+3D+P-velocity+model+of+the+crust+and+mantle+for+improved+seismic+event+location&rft.au=Begnaud%2C+M+L%3BBallard%2C+S%3BYoung%2C+C+J%3BHipp%2C+J+R%3BEncarnacao%2C+A%3BPhillips%2C+W%3BChael%2C+E+P%3BRowe%2C+C+A%3BAnonymous&rft.aulast=Begnaud&rft.aufirst=M&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Multi-station broad regional event detection using waveform correlation AN - 1707526114; 2015-080609 AB - Previous waveform correlation studies have established the occurrence of repeating seismic events in various regions, and the utility of waveform-correlation event-detection on broad regional or even global scales to find events currently not included in traditionally-prepared bulletins. The computational burden, however, is high, limiting previous experiments to relatively modest template libraries and/or processing time periods. We have developed a distributed computing waveform correlation event detection utility that allows us to process years of continuous waveform data with template libraries numbering in the thousands. We have used this system to process several years of waveform data from IRIS stations in East Asia, using libraries of template events taken from global and regional bulletins. Detections at a given station are confirmed by 1) comparison with independent bulletins of seismicity, and 2) consistent detections at other stations. We find that many of the detected events are not in traditional catalogs, hence the multi-station comparison is essential. In addition to detecting the similar events, we also estimate magnitudes very precisely based on comparison with the template events (when magnitudes are available). We have investigated magnitude variation within detected families of similar events, false alarm rates, and the temporal and spatial reach of templates. JF - American Geophysical Union Fall Meeting AU - Slinkard, M AU - Stephen, H AU - Young, C J AU - Eckert, R AU - Schaff, D P AU - Richards, P G AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S21B EP - 2402 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707526114?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Multi-station+broad+regional+event+detection+using+waveform+correlation&rft.au=Slinkard%2C+M%3BStephen%2C+H%3BYoung%2C+C+J%3BEckert%2C+R%3BSchaff%2C+D+P%3BRichards%2C+P+G%3BAnonymous&rft.aulast=Slinkard&rft.aufirst=M&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - International collaboration to improve the Regional Seismic Travel Time (RSTT) model AN - 1707526105; 2015-080598 AB - The Regional Seismic Travel Time (RSTT) method (Myers et al., 2010) was developed to facilitate the use of regional data in routine seismic monitoring. RSTT improves prediction accuracy for Pn, Pg, Sn, and Lg travel times using a 3-dimensional model of the Earth's crust and laterally varying seismic wave speed in the upper mantle. Upper mantle velocity is parameterization as a linear function of depth, so that travel times can be computed accurately and in real time. Real-time computation on readily available computers is key to the usefulness of the method by seismic centers that utilize today's flexible networks. In areas where the RSTT model is well constrained by tomography (Eurasia and North America) we have demonstrated improvement in event location accuracy. Extension of RSTT tomographic datasets to new regions is being pursued through international outreach efforts that are coordinated between the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) and the International Seismological Centre (ISC). Our efforts to date have expanded the collection of regionally recorded events with well-constrained hypocenters in South America, Australia, and Africa. We have also incorporated recently published models of crust and upper mantle structure into the RSTT model. Tests in regions sampled by newly compiled data suggest that the RSTT model improves travel time predictions with respect to the ak135 model (Kennett et al., 1995), which is the global standard for travel time prediction. We are continuing to collect and freely distribute ground-truth data in new regions as well as updates to the RSTT model. This work performed in part under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. JF - American Geophysical Union Fall Meeting AU - Myers, S C AU - Begnaud, M L AU - Ballard, S AU - Bondar, I AU - Storchak, D A AU - Given, Jeffrey W AU - Guendel, F AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S21B EP - 2391 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707526105?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=International+collaboration+to+improve+the+Regional+Seismic+Travel+Time+%28RSTT%29+model&rft.au=Myers%2C+S+C%3BBegnaud%2C+M+L%3BBallard%2C+S%3BBondar%2C+I%3BStorchak%2C+D+A%3BGiven%2C+Jeffrey+W%3BGuendel%2C+F%3BAnonymous&rft.aulast=Myers&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Integrated mapping and imaging at a legacy test site AN - 1707526034; 2015-080733 AB - A team of multi-disciplinary geoscientists was tasked to characterize and evaluate a legacy nuclear detonation site in order to develop research locations with the long-term goal of improving treaty monitoring, verification, and other national security applications. There was a test at the site of interest that was detonated on June 12, 1985 in a vertical emplacement borehole at a depth of 608m below the surface in rhyolites. With announced yield of 20-150 kt, the event did not collapse to the surface and form a crater, but rather experienced a subsurface collapse with more subtle surface expressions of deformation. This result provides the team with an opportunity to evaluate a number of surface and subsurface inspection technologies in a broad context. The team collected ground-based visual observation, ground penetrating radar, electromagnetic, ground-based and airborne LiDAR, ground-based and airborne hyperspectral, gravity and magnetics, dc and induction electrical methods, and active seismic data during field campaigns in the summers of 2012 and 2013. Detection of features was performed using various approaches that were assessed for accuracy, efficiency and diversity of target features. For example, whereas the primary target of the ground-based visual observation survey was to map the surface features, the target of the gravity survey was to attempt the detection of a possible subsurface collapse zone which might be located as little as 200 meters below the surface. The datasets from surveys described above are integrated into a geographical information system (GIS) database for analysis and visualization. Other presentations during this session provide further details as to some of the work conducted. JF - American Geophysical Union Fall Meeting AU - Sussman, A J AU - Schultz-Fellenz, E S AU - Kelley, R E AU - Sweeney, J J AU - Vigil, S AU - DiBenedetto, J AU - Chipman, V AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S31E EP - 03 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707526034?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Integrated+mapping+and+imaging+at+a+legacy+test+site&rft.au=Sussman%2C+A+J%3BSchultz-Fellenz%2C+E+S%3BKelley%2C+R+E%3BSweeney%2C+J+J%3BVigil%2C+S%3BDiBenedetto%2C+J%3BChipman%2C+V%3BAnonymous&rft.aulast=Sussman&rft.aufirst=A&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - Refinement and testing of the probabilisitic event detection association and location algorithm AN - 1707524880; 2015-080612 AB - We present results of testing of the latest version of our Probabilistic Event Detection, Association, and Location algorithm (PEDAL). As before, in our method, the Earth is discretized into a dense 3D grid of 427,265 nodes, extended to 4D by the addition of a time dimension. Given a set of seismic observations (arrival time, horizontal slowness, and azimuth), a "fitness" value is calculated at each grid node, assuming that each observation was generated by a refracted P wave. The node with peak fitness value is accepted as a hypothetical seismic event location, subject to some peak criteria and minimal fitness value. Once we have identified the peak, we solve for the corresponding origin time and then associate individual arrivals with the event, considering many different phases. In the new method, we have made several improvements: 1) we incorporate a prior probability of detecting each phase of interest at each station; 2) we do association in two stages, P first, then later phases; 3) after the P phase association, we calculate an mb and perform association with secondary phases based on magnitude, depth, and distance from event to station. We tested the new version on a 14-day period of time that has been processed by the IDC and that have also been carefully examined by an analyst to identify all legitimate events. A sophisticated bulletin review algorithm is used to compare PEDAL results to both the automatically-generated IDC SEL3 event list, a product of the Global Associator (GA) software, and the analyst-reviewed LEB. We show that our latest version of PEDAL significantly exceeds the performance of GA on IDC data. JF - American Geophysical Union Fall Meeting AU - Draelos, T J AU - Ballard, S AU - Young, C J AU - Brogan, Ronald A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S21B EP - 2405 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707524880?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Refinement+and+testing+of+the+probabilisitic+event+detection+association+and+location+algorithm&rft.au=Draelos%2C+T+J%3BBallard%2C+S%3BYoung%2C+C+J%3BBrogan%2C+Ronald+A%3BAnonymous&rft.aulast=Draelos&rft.aufirst=T&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 ER - TY - JOUR T1 - RoMi; refraction microtremor using rotational seismometers AN - 1703686904; 2015-078021 AB - We present the results of a shallow shear-wave velocity study that utilized both traditional geophones and a newly developed rotational seismometer (Applied Technology Associates ARS-16). We used Refraction Microtremor (ReMi), a method developed by John N. Louie, during processing to determine both Rayleigh and Love wave dispersion curves using both vertical and horizontal sources. ReMi uses a distance-time (x-t) wavefield transformation technique to image the dispersion curve in slowness-frequency (p-f) space. In the course of the ReMi processing, unwanted P waves are transformed into p-f space. As rotational seismometers are insensitive to P waves, they should prove to be superior sensors for Love wave studies, as those P waves would not interfere with interpretation of the p-f wavefield. Our results show that despite having one-fifth the geophone signal-to-noise ratio in the distance-time wavefield, the ARS-16 produced superior results in the p-f wavefield. Specifically, we found increases of up to 50% in ReMi spectral ratio along the dispersion curve. This implies that as more quiet and sensitive rotational sensors are developed, deploying rotational seismometers instead of traditional sensors will yield significantly better results. This will ultimately improve shallow shear-wave velocity resolution, which is vital for calculating seismic hazard. This data was collected at Sandia National Laboratories' Facility for Analysis, Calibration, and Testing (FACT) located in Albuquerque, NM. JF - American Geophysical Union Fall Meeting AU - Clark, B AU - Abbott, R E AU - Knox, Hunter A AU - Eimer, M O AU - Hart, D M AU - Skaggs, J AU - Denning, J T AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract NS21A EP - 1563 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703686904?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=RoMi%3B+refraction+microtremor+using+rotational+seismometers&rft.au=Clark%2C+B%3BAbbott%2C+R+E%3BKnox%2C+Hunter+A%3BEimer%2C+M+O%3BHart%2C+D+M%3BSkaggs%2C+J%3BDenning%2C+J+T%3BAnonymous&rft.aulast=Clark&rft.aufirst=B&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - Investigating the thermal limit of clay minerals for applications in nuclear waste repository design AN - 1696874896; 2015-066306 AB - Clay minerals are likely candidates to aid in nuclear waste isolation due to their low permeability, favorable swelling properties, and high cation sorption capacities. Establishing the thermal limit for clay minerals in a nuclear waste repository is a potentially important component of repository design, as flexibility of the heat load within the repository can have a major impact on the selection of repository design. For example, the thermal limit plays a critical role in the time that waste packages would need to cool before being transferred to the repository. Understanding the chemical and physical changes that occur in clay minerals at various temperatures above the current thermal limit (of 100 degrees C) can enable decision-makers with information critical to evaluating the potential trade-offs of increasing the thermal limit within the repository. Most critical is gaining understanding of how varying thermal conditions in the repository will impact radionuclide sorption and transport in clay materials either as engineered barriers or as disposal media. A variety of clays (illite, mixed layer illite/smectite, montmorillonite, and palygorskite) were heated for a range of temperatures between 100-500 degrees C. These samples were characterized by a variety of methods, including nitrogen adsorption, x-ray diffraction, thermogravimetric analysis, barium chloride exchange for cation exchange capacity (CEC), and iodide sorption. The nitrogen porosimetry shows that for all the clays, thermally-induced changes in BET surface area are dominated by collapse/creation of the microporosity, i.e. pore diameters < 17 angstroms. Changes in micro porosity (relative to no heat treatment) are most significant for heat treatments 300 degrees C and above. Alterations are also seen in the chemical properties (CEC, XRD, iodide sorption) of clays, and like pore size distribution changes, are most significant above 300 degrees C. Overall, the results imply that changes seen in pores size distribution correlate with cation exchange capacity and cation exchange processes. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's Nation Nuclear Security Administration under contract DE-AC04-94AL85000. SAND Number: 2013-6352A. JF - American Geophysical Union Fall Meeting AU - Matteo, E N AU - Miller, A W AU - Kruichak, J AU - Mills, M AU - Tellez, H AU - Wang, Y AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H31E EP - 1236 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696874896?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Investigating+the+thermal+limit+of+clay+minerals+for+applications+in+nuclear+waste+repository+design&rft.au=Matteo%2C+E+N%3BMiller%2C+A+W%3BKruichak%2C+J%3BMills%2C+M%3BTellez%2C+H%3BWang%2C+Y%3BAnonymous&rft.aulast=Matteo&rft.aufirst=E&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Pore-scale investigation on stress-dependent characteristics of granular packs and their impact on multiphase fluid distribution AN - 1696873579; 2015-066299 AB - The pore-scale dynamics that govern multiphase flow under variable stress conditions are not well understood. This lack of fundamental understanding limits our ability to quantitatively predict multiphase flow and fluid distributions in natural geologic systems. In this research, we focus on pore-scale, single and multiphase flow properties that impact displacement mechanisms and residual trapping of non-wetting phase under varying stress conditions. X-ray micro-tomography is used to image pore structures and distribution of wetting and non-wetting fluids in water-wet synthetic granular packs, under dynamic load. Micro-tomography images are also used to determine structural features such as medial axis, surface area, and pore body and throat distribution; while the corresponding transport properties are determined from Lattice-Boltzmann simulations performed on lattice replicas of the imaged specimens. Results are used to investigate how inter-granular deformation mechanisms affect fluid displacement and residual trapping at the pore-scale. This will improve our understanding of the dynamic interaction of mechanical deformation and fluid flow during enhanced oil recovery and geologic CO2 sequestration. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Torrealba, V AU - Karpyn, Z AU - Yoon, H AU - Hart, D B AU - Klise, K A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H31E EP - 1229 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696873579?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Pore-scale+investigation+on+stress-dependent+characteristics+of+granular+packs+and+their+impact+on+multiphase+fluid+distribution&rft.au=Torrealba%2C+V%3BKarpyn%2C+Z%3BYoon%2C+H%3BHart%2C+D+B%3BKlise%2C+K+A%3BAnonymous&rft.aulast=Torrealba&rft.aufirst=V&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Modeling the Chelyabinsk airburst AN - 1696872652; 2015-066561 AB - In the early morning hours of Feb. 15, 2013, a small asteroid exploded over a rural area about 40 km SSW of the Russian city of Chelyabinsk. Its proximity to a population center led to many injuries and widespread blast damage, but also yielded a plethora of serendipitous data in the form of video footage from security and dashboard cameras. Combined with seismic, infrasound, and satellite records, this data provides a rich and multi-faceted means to determine the projectile size and entry parameters, and to develop a self-consistent model of the airburst. The best estimate of the kinetic yield (explosive energy) is 400-500 kilotons, making Chelyabinsk the most powerful such event observed since the 1908 Tunguska explosion (3-5 megatons). Analysis of videos combined with subsequent on-site stellar calibrations have enabled precise estimates of entry velocity (19 km/s), angle (17 degrees from the horizontal) and altitude of peak brightness (29 km). This implies a pre-entry diameter of approximately 20 m and mass of approximately 1200 tonnes. Satellite sensors recorded the emission peak at 03:20:33 UT, with a total radiated energy of 3.75 X 10 (super 14) J ( approximately 90 kilotons). A typical bolide luminous efficiency of 20% implies a total yield of about 450 kilotons, consistent with infrasound and other observations. The maximum radiant intensity was 2.7 X 10 (super 13) W/ster, corresponding to a magnitude of -28. The shallow entry angle led to a very long duration of the bolide (16.5 s) and energy was deposited over hundreds of km, leading to an extended, near-horizontal, high-altitude linear explosion. The blast wave was distributed over a large area, and because of divergence it was much weaker than it would have been for a steep entry and a more concentrated explosion closer to the surface. The orientation also led to different phenomena than expected for a more vertical entry. There was no ballistic plume as observed from Shoemaker-Levy 9 impacts on Jupiter (45 degrees ) and calculated for Tunguska ( approximately 35 degrees ). Instead, buoyant instabilities grew into mushroom clouds and the trail bifurcated into two contra-rotating vortices. We have now used the information gained from observational data to initialize hydrodynamic simulations with extremely accurate energy depositions at well-defined locations. Results can be compared to observations (such as timing and distribution of blast energy at the surface, and evolution of the trail). This leads to better validation of the models and understanding of the physical phenomena associated with airbursts. Finally, according to observation-based size/frequency curves, Chelyabinsk is approximately a once-per-century event and Tunguska is about once-per-millennium. These two high-end outliers suggest that the frequency of large airbursts has been underestimated. Models also show that they are more damaging than nuclear explosions of the same magnitude (traditionally used to estimate impact risk). The risk from airbursts is therefore greater than previously thought. JF - American Geophysical Union Fall Meeting AU - Boslough, M AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract NH21D EP - 03 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696872652?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Modeling+the+Chelyabinsk+airburst&rft.au=Boslough%2C+M%3BAnonymous&rft.aulast=Boslough&rft.aufirst=M&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Constraining paleo-hydrologic flow fields from iron oxide cementation patterns AN - 1692746175; 2015-063081 AB - Fine-grained sandstone in Mesozoic sedimentary red beds of the Colorado Plateau (southwestern United States) contain iron oxides cements (e.g., hematite and goethite) that display spectacular pattern formation, including evenly spaced nodule formation and banding with nested scales spanning about two to three orders of magnitude. These nodules are commonly referred to as concretions, which are cemented mineral masses. The size of concretions typically ranges from millimeters to centimeters, while the spacing of bands ranges from millimeters to sub-meters. Spatial transition of one pattern to another or one pattern superimposed on another is also observed. Such patterns may embed important information about paleo-environments of sediment diagenesis, especially regarding the fluid migration and geochemical conditions involved. Field evidence indicates that the formation of iron oxide bands in sandstone seems closely related to groundwater flows. Here we show that such patterns can autonomously emerge from a previously unrecognized Ostwald ripening mechanism and they capture rich information regarding ancient chemical and hydrologic environments. Using a linear stability analysis, we demonstrate that the pattern transition from nodules to bands results from symmetry breaking triggered by groundwater advection. Nodules tend to develop under nearly stagnant hydrologic conditions, while repetitive bands tend to form in the presence of persistent water flows. The banding is formed perpendicularly to the flow direction, and the flow rate is expected to be proportional to the square of banding spacing. Therefore, careful mapping of cementation patterns and banding spacing over rock outcrops will allow us to reconstruct a detail map of water flow field for a sandstone aquifer. Concretion nodules formed in Jurassic Navajo Sandstone have been proposed as a terrestrial analogue to hematite spherules detected by the rover Opportunity at the Meridiani Planum site on the Mars. Since persistent water circulation is generally required for a sustainable subsurface life, a site with the presence of iron oxide bands, if any exists, may offer a better chance for detecting extraterrestrial biosignatures on Mars. JF - American Geophysical Union Fall Meeting AU - Wang, Y AU - Chan, Marjorie A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract NG43A EP - 1665 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692746175?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Constraining+paleo-hydrologic+flow+fields+from+iron+oxide+cementation+patterns&rft.au=Wang%2C+Y%3BChan%2C+Marjorie+A%3BAnonymous&rft.aulast=Wang&rft.aufirst=Y&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Integrated energy-water planning in the western and Texas interconnections AN - 1692743046; 2015-059059 AB - While thermoelectric power generation accounts for less than one percent of total water consumption in the western U.S, steady growth in demand is projected for this sector. Complexities and heterogeneity in water supply, water demand, and institutional controls make water development a challenging proposition throughout the West. A consortium of National Laboratories, the University of Texas and the Electric Power Research Institute are working with the Western Governors' Association and Western States Water Council to assist the Western Electricity Coordinating Council and the Electric Reliability Council of Texas to integrate water related issues into long-term transmission planning. Specifically, water withdrawal and consumption have been estimated for each western power plant and their susceptibility to climate impacts assessed. To assist with transmission planning, water availability and cost data have been mapped at the 8-digit Hydrologic Unit Code level for the conterminous western U.S. (1208 watersheds). Five water sources were individually considered, including unappropriated surface water, unappropriated groundwater, appropriated water, municipal wastewater and brackish groundwater. Also mapped is projected growth in consumptive water demand to 2030. The relative costs (capital and O&M) to secure, convey, and treat the water as necessary have also been estimated for each source of water. These data configured into watershed level supply curves were subsequently used to constrain West-wide transmission planning. Results across a range of alternative energy futures indicate the impact of water availability and cost on the makeup and siting of future power generation. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Tidwell, V C AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H14F EP - 05 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692743046?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Integrated+energy-water+planning+in+the+western+and+Texas+interconnections&rft.au=Tidwell%2C+V+C%3BAnonymous&rft.aulast=Tidwell&rft.aufirst=V&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Multirate transport of natural tracers in a fractured system AN - 1692742986; 2015-059174 AB - Flow and transport in fractured systems is important in both groundwater applications and low-permeability hydrocarbon systems. We apply the multirate solute transport model to the flow of single-phase natural tracers in low-permeability hydrocarbon source rocks. We explore the effects of fracture and domain geometry, reservoir boundary conditions, and initial conditions of both the flow and transport problems using analytical and semi-analytical solutions. The flow and transport solutions will be combined to optimize reservoir characterization using a Bayesian framework. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Kuhlman, K L AU - Malama, B AU - Heath, J E AU - Gardner, P AU - Robinson, D G AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H53A EP - 1405 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692742986?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Multirate+transport+of+natural+tracers+in+a+fractured+system&rft.au=Kuhlman%2C+K+L%3BMalama%2C+B%3BHeath%2C+J+E%3BGardner%2C+P%3BRobinson%2C+D+G%3BAnonymous&rft.aulast=Kuhlman&rft.aufirst=K&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Krypton-81 and groundwater flow in the culebra dolomite near the Waste Isolation Pilot Plant, New Mexico AN - 1692740820; 2015-059007 AB - The Waste Isolation Pilot Plant (WIPP) in New Mexico is the first geologic repository for disposal of transuranic nuclear waste from defense-related programs of the US Department of Energy. It is constructed within halite beds of the Permian-age Salado Formation. The Culebra Dolomite, confined within Rustler Formation evaporites, is a potential pathway for radionuclide transport from the repository to the accessible environment in the human-disturbed repository scenario. Although extensive subsurface characterization and numerical flow modeling of groundwater has been done in the vicinity of the WIPP, few studies have used natural isotopic tracers to validate the flow models at this site. We performed measurements of the cosmogenic isotopic tracer (super 81) Kr (half-life 229,000 yr) in two Culebra monitoring wells near the WIPP site, and compared (super 81) Kr model ages with the results of an ensemble of flow models. The (super 81) Kr model ages were approximately 130,000 and approximately 330,000 yr for high-transmissivity and low-transmissivity portions of the aquifer, respectively. These model ages are in broad agreement with flow model results, when taking into account diffusive exchange of Kr between the aquifer and the stagnant zones of the confining formations. JF - American Geophysical Union Fall Meeting AU - Sturchio, N C AU - Kuhlman, K L AU - Yokochi, R AU - Jiang, W AU - Lu, Z AU - Mueller, P AU - Yang, G AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H13I EP - 1490 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692740820?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Krypton-81+and+groundwater+flow+in+the+culebra+dolomite+near+the+Waste+Isolation+Pilot+Plant%2C+New+Mexico&rft.au=Sturchio%2C+N+C%3BKuhlman%2C+K+L%3BYokochi%2C+R%3BJiang%2C+W%3BLu%2C+Z%3BMueller%2C+P%3BYang%2C+G%3BAnonymous&rft.aulast=Sturchio&rft.aufirst=N&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Transient streaming potentials associated with brine flow in rock salt AN - 1692740723; 2015-058905 AB - Experimental data collected in falling-head permeameter tests using brine flow through crushed rock salt are presented. The brine was obtained by recirculating what was initially deionized water through a column of crushed rock salt until saturation (specific gravity = 1.205) was attained. The column was then repacked with fresh crushed salt. Brine flow through the salt was then monitored with a pressure transducer and silver-silver chloride (Ag/AgCl) electrodes, measuring the pressure and voltage drops, respectively, across the length of the salt column. The measurements are reported. Preliminary analysis of the data is performed with a recently developed model for transient streaming potentials in falling-head permeameters. JF - American Geophysical Union Fall Meeting AU - Malama, B AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H13D EP - 1351 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692740723?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Transient+streaming+potentials+associated+with+brine+flow+in+rock+salt&rft.au=Malama%2C+B%3BAnonymous&rft.aulast=Malama&rft.aufirst=B&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - High performance simulation of environmental tracers in heterogeneous formations AN - 1692740715; 2015-059159 AB - Environmental tracers provide information on fluid flux, yielding important information for use in groundwater studies. Currently environmental tracer interpretation has been limited by computational expense. Here we use a scalable, massively parallel, flow and reactive transport code PFLOTRAN to simulate the concentrations of (super 3) H, (super 3) He, CFC-11, CFC-12, CFC-113, SF (sub 6) , (super 39) Ar, (super 81) Kr, (super 4) He and the mean groundwater age in 2D and 3D heterogeneous fields on grids with an excess of 10 million nodes. We utilize this computational platform to simulate the spatial distribution of environmental tracer concentration, tracer derived ages and modeled mean ground water age in heterogeneous aquifers. Modeled concentrations are then used to calculate tracer derived ages. The deviation of the tracer derived age distribution from the true groundwater age distribution increases with increasing heterogeneity of the system. The separation between the apparent age derived from different tracers also increases with increasing system heterogeneity. Age distributions in 3D aquifers differ significantly from 2D simulations with similar spatial statistics. The addition of the 3rd dimension increases connectivity, decreasing mean age and reducing age variability. High performance computation allows for investigation of tracer and groundwater age spatial distribution in unprecedented detail, providing a foundation for the next generation of environmental tracer interpretation. JF - American Geophysical Union Fall Meeting AU - Gardner, P AU - Hammond, G E AU - Lichtner, Peter C AU - Arnold, B W AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H52F EP - 08 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692740715?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=High+performance+simulation+of+environmental+tracers+in+heterogeneous+formations&rft.au=Gardner%2C+P%3BHammond%2C+G+E%3BLichtner%2C+Peter+C%3BArnold%2C+B+W%3BAnonymous&rft.aulast=Gardner&rft.aufirst=P&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Evaluation of parameter uncertainty reduction in groundwater flow modeling using multiple environmental tracers AN - 1689591325; 2015-056488 AB - Calibration of groundwater flow models for the purpose of evaluating flow and aquifer heterogeneity typically uses observations of hydraulic head in wells and appropriate boundary conditions. Environmental tracers have a wide variety of decay rates and input signals in recharge, resulting in a potentially broad source of additional information to constrain flow rates and heterogeneity. A numerical study was conducted to evaluate the reduction in uncertainty during model calibration using observations of various environmental tracers and combinations of tracers. A synthetic data set was constructed by simulating steady groundwater flow and transient tracer transport in a high-resolution, 2-D aquifer with heterogeneous permeability and porosity using the PFLOTRAN software code. Data on pressure and tracer concentration were extracted at well locations and then used as observations for automated calibration of a flow and transport model using the pilot point method and the PEST code. Optimization runs were performed to estimate parameter values of permeability at 30 pilot points in the model domain for cases using 42 observations of: 1) pressure, 2) pressure and CFC11 concentrations, 3) pressure and Ar-39 concentrations, and 4) pressure, CFC11, Ar-39, tritium, and He-3 concentrations. Results show significantly lower uncertainty, as indicated by the 95% linear confidence intervals, in permeability values at the pilot points for cases including observations of environmental tracer concentrations. The average linear uncertainty range for permeability at the pilot points using pressure observations alone is 4.6 orders of magnitude, using pressure and CFC11 concentrations is 1.6 orders of magnitude, using pressure and Ar-39 concentrations is 0.9 order of magnitude, and using pressure, CFC11, Ar-39, tritium, and He-3 concentrations is 1.0 order of magnitude. Data on Ar-39 concentrations result in the greatest parameter uncertainty reduction because its half-life of 269 years is similar to the range of transport times (hundreds to thousands of years) in the heterogeneous synthetic aquifer domain. The slightly higher uncertainty range for the case using all of the environmental tracers simultaneously is probably due to structural errors in the model introduced by the pilot point regularization scheme. It is concluded that maximum information and uncertainty reduction for constraining a groundwater flow model is obtained using an environmental tracer whose half-life is well matched to the range of transport times through the groundwater flow system. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Arnold, B W AU - Gardner, P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H53F EP - 1487 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1689591325?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Evaluation+of+parameter+uncertainty+reduction+in+groundwater+flow+modeling+using+multiple+environmental+tracers&rft.au=Arnold%2C+B+W%3BGardner%2C+P%3BAnonymous&rft.aulast=Arnold&rft.aufirst=B&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-06-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - (super 220) Rn as a method for identifying point sources of groundwater discharge; expanding the dissolved gas tool kit in groundwater stream water interactions AN - 1686061549; 2015-049000 AB - The most commonly used dissolved gas environmental tracer technique for estimating groundwater discharge to streams is (super 222) Rn. (super 222) Rn has very low background in surface water and has a relatively long retention time in stream water, providing a high sensitivity for detecting groundwater discharge. Given the gas exchange velocity and half-life of (super 222) Rn groundwater input signal can persist for over 5 km, making identification of point source discharge difficult. (super 220) Rn (Thoron), is produced in the subsurface along with (super 222) Rn, but has a half-life of 55.6s and decays away rapidly once it enters stream water. Thus, (super 220) Rn is an ideal tracer for identifying point locations of groundwater discharge. (super 220) can be measured in conjunction with (super 222) Rn providing a convenient methodology for identifying diffuse and point discharges of groundwater. The conditions required for measuring (super 220) Rn, methodology for measuring (super 220) Rn and characteristics of (super 222) Rn and (super 220) Rn signals in groundwater-stream water applications will be discussed. Initial results from a field investigation utilizing these tracers in the Jemez River in Northern New Mexico will be presented. JF - American Geophysical Union Fall Meeting AU - Gardner, P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H23N EP - 05 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686061549?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=%28super+220%29+Rn+as+a+method+for+identifying+point+sources+of+groundwater+discharge%3B+expanding+the+dissolved+gas+tool+kit+in+groundwater+stream+water+interactions&rft.au=Gardner%2C+P%3BAnonymous&rft.aulast=Gardner&rft.aufirst=P&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-06-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Characterization of hydraulic fractures and reservoir properties of shale using natural tracers AN - 1686061362; 2015-049053 AB - Hydraulic fracturing plays a major role in the economic production of hydrocarbon from shale. Current fracture characterization techniques are limited in diagnosing the transport properties of the fractures on the near wellbore scale to that of the entire stimulated reservoir volume. Microseismic reveals information on fracture geometries, but not transport properties. Production analysis (e.g., rate transient analysis using produced fluids) estimates fracture and reservoir flow characteristics, but often relies on simplified models in terms of fracture geometries and fluid storage and transport. We present the approach and potential benefits of incorporating natural tracers with production data analysis for fracture and reservoir characterization. Hydraulic fracturing releases omnipresent natural tracers that accumulate in low permeability rocks over geologic time (e.g., radiogenic 4He and 40Ar). Key reservoir characteristics govern the tracer release, which include: the number, connectivity, and geometry of fractures; the distribution of fracture-surface-area to matrix-block-volume; and the nature of hydrocarbon phases within the reservoir (e.g., methane dissolved in groundwater or present as a separate gas phase). We explore natural tracer systematics using numerical techniques under relevant shale-reservoir conditions. We evaluate the impact on natural tracer transport due to a variety of conceptual models of reservoir-transport properties and boundary conditions. Favorable attributes for analysis of natural tracers include the following: tracer concentrations start with a well-defined initial condition (i.e., equilibrium between matrix and any natural fractures); there is a large suite of tracers that cover a range of at least 7X in diffusion coefficients; and diffusive mass-transfer out of the matrix into hydraulic fractures will cause elemental and isotopic fractionation. JF - American Geophysical Union Fall Meeting AU - Heath, J E AU - Gardner, P AU - Kuhlman, K L AU - Malama, B AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR11A EP - 2213 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686061362?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Characterization+of+hydraulic+fractures+and+reservoir+properties+of+shale+using+natural+tracers&rft.au=Heath%2C+J+E%3BGardner%2C+P%3BKuhlman%2C+K+L%3BMalama%2C+B%3BAnonymous&rft.aulast=Heath&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-06-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Combined AC-STEM and FIB-SEM characterization of shale AN - 1686060565; 2015-049056 AB - We examine shale samples with state-of-the-art aberration corrected scanning transmission electron microscopy (AC-STEM) and focused ion beam-scanning electron (FIB-SEM) microscopy. Three-dimensional reconstruction of pore space incorporates electron tomography using the AC-TEM and serial sectioning by FIB-SEM. Chemical analysis by X-ray energy dispersive microscopy reveals composition of pore-lining phases at approximately 1 nm resolution. Our methods reveal the left tail of the pore size distribution that FIB-SEM techniques typically do not capture (pore sizes <7 nm). Water in pores of this size will deviate from those of bulk water, which can influence non-Darcy flow and mechanical response. The impact of these small pores on fluid and coupled tracer transport is examined by computation fluid dynamics using 3D pore reconstructions. JF - American Geophysical Union Fall Meeting AU - Dewers, T A AU - Heath, J E AU - Kotula, P AU - Yoon, H AU - Gardner, P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR11A EP - 2216 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686060565?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Combined+AC-STEM+and+FIB-SEM+characterization+of+shale&rft.au=Dewers%2C+T+A%3BHeath%2C+J+E%3BKotula%2C+P%3BYoon%2C+H%3BGardner%2C+P%3BAnonymous&rft.aulast=Dewers&rft.aufirst=T&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-06-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Geomechanical modeling to predict wellbore stresses and strains for the design of wellbore seal repair materials AN - 1686057194; 2015-046432 AB - A critical aspect of designing effective wellbore seal repair materials is predicting thermo-mechanical perturbations in local stress that can compromise seal integrity. For the DOE-NETL project "Wellbore Seal Repair Using Nanocomposite Materials", we are especially interested in the stress-strain history of abandoned wells, as well as changes in local pressure, stress, and temperature conditions that accompany carbon dioxide injection or brine extraction. Building on existing thermo-hydro-mechanical (THM) finite element modeling of wellbore casings subject to significant tensile and shear loads, we advance a conceptual and numerical methodology to assess responses of annulus cement and casing. Bench-scale models complement bench-top experiments of an integrated seal system in an idealized scaled wellbore mock-up being used to test candidate seal repair materials. Field scale models use the stratigraphy from a pilot CO2 injection operation to estimate the necessary mechanical properties needed for a successful repair material. We report on approaches used for adapting existing wellbore models and share preliminary results of field scale models. JF - American Geophysical Union Fall Meeting AU - Gomez, S P AU - Sobolik, S R AU - Matteo, E N AU - Dewers, T A AU - Taha, M R AU - Stormont, J C AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H23B EP - 1241 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686057194?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Geomechanical+modeling+to+predict+wellbore+stresses+and+strains+for+the+design+of+wellbore+seal+repair+materials&rft.au=Gomez%2C+S+P%3BSobolik%2C+S+R%3BMatteo%2C+E+N%3BDewers%2C+T+A%3BTaha%2C+M+R%3BStormont%2C+J+C%3BAnonymous&rft.aulast=Gomez&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-06-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Extent and effect of fault-controlled CO (sub 2) alteration on reservoir and seal rocks and implications for geomechanical failure at Crystal Geyser, Green River, Utah AN - 1686057177; 2015-046433 AB - A structural diagenesis approach involving the coupled chemical and mechanical properties of reservoir and seal rocks is necessary for assessing the short and long term security of sequestered CO2. Current numerical models used to model subsurface CO2 reservoirs do not account for such processes, and typically these use only linear-elastic geomechanical properties, ignoring failure parameters such as fracture toughness. In addition, numerical models normally lack constraints on long-term, geologic time scales. Study of fossil and active CO2 seeps found at Little Grand Wash and Salt Wash fault systems near Green River, Utah are invaluable to assess long-term storage and leakage behavior in natural systems. Observations from the site and geomechanical testing also indicate that fracture systems play a crucial role in leakage, and the extent of fracturing and CO2-related alteration extends from tens to over one-hundred meters. Failure parameters of reservoir and seal rocks under variable environmental conditions, such as fracture toughness should also be quantified as they likely play a role in fracturing and leakage. Subcritical fracture growth may also be involved. Transects across the Little Grand Wash fault show distinct mineralogical and isotopic trends related to alteration by CO2-rich fluids. Calcite is the dominant precipitated mineral, both in reservoir (sandstone) and seal (siltstone & mudrock) lithologies. Precipitated calcite is isotopically distinct and observed in bulk rock isotopic trends. Fracture toughness testing using the short rod method indicates that CO2-related alteration of rocks exposed at the field site has weakened one reservoir lithology by half (0.57 versus 0.27 MPam). A full suite of lithologies are being tested and compared with the double torsion test method under ambient air conditions. These same samples are also being tested in environmental conditions more like those encountered in a CO2 sequestration scenario. These data can and should be integrated into more sophisticated numerical models in order to assess their impact on the overall risk analysis of CO2 injection sites and provide more geologically realistic and accurate results. JF - American Geophysical Union Fall Meeting AU - Major, J R AU - Eichhubl, Peter AU - Dewers, T A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H23B EP - 1242 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686057177?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Extent+and+effect+of+fault-controlled+CO+%28sub+2%29+alteration+on+reservoir+and+seal+rocks+and+implications+for+geomechanical+failure+at+Crystal+Geyser%2C+Green+River%2C+Utah&rft.au=Major%2C+J+R%3BEichhubl%2C+Peter%3BDewers%2C+T+A%3BAnonymous&rft.aulast=Major&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-06-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Vertical flume testing of WIPP surrogate waste materials AN - 1680756659; 2015-043038 AB - The Waste Isolation Pilot Plant (WIPP) is a U.S. Department of Energy geological repository for the permanent disposal of defense-related transuranic (TRU) waste. The waste is emplaced in rooms excavated in the bedded Salado salt formation at a depth of 655 m below ground surface. After emplacement of the waste, the repository will be sealed and decommissioned. The DOE demonstrates compliance with 40 CFR 194 by means of performance assessment (PA) calculations conducted by Sandia National Laboratories. WIPP PA calculations estimate the probability and consequences of radionuclide releases for a 10,000 year regulatory period. Human intrusion scenarios include cases in which a future borehole is drilled through the repository. Drilling mud flowing up the borehole will apply a hydrodynamic shear stress to the borehole wall which could result in erosion of the waste and radionuclides being carried up the borehole. WIPP PA uses the parameter TAUFAIL to represent the shear strength of the degraded waste. The hydrodynamic shear strength can only be measured experimentally by flume testing. Flume testing is typically performed horizontally, mimicking stream or ocean currents. However, in a WIPP intrusion event, the drill bit would penetrate the degraded waste and drilling mud would flow up the borehole in a predominantly vertical direction. In order to simulate this, a flume was designed and built so that the eroding fluid enters an enclosed vertical channel from the bottom and flows up past a specimen of surrogate waste material. The sample is pushed into the current by a piston attached to a step motor. A qualified data acquisition system controls and monitors the fluid's flow rate, temperature, pressure, and conductivity and the step motor's operation. The surrogate materials used correspond to a conservative estimate of degraded TRU waste at the end of the regulatory period. The recipes were previously developed by SNL based on anticipated future states of the waste considering inventory, changes in the underground environment, and theoretical and experimental results. The recipes represent the degraded waste in its weakest condition; simulating 50, 75, and 100% degradation by weight. The percent degradation indicates the anticipated amount of iron corrosion and decomposition of cellulosics, plastics, and rubbers. Samples were die compacted to two pressures, 2.3 and 5.0 MPa. Testing has established that the less degraded the surrogate material is and the higher the compaction stress it undergoes, the stronger the sample is. The 50% degraded surrogate waste material was accepted for use in obtaining input parameters for another WIPP PA model by a conceptual model peer review panel and the EPA. The use of a 50% degraded surrogate waste in vertical flume testing would provide an improved estimate of the waste shear strength and establish consistency between PA models in the approach used to obtain input parameters. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. This research is funded by WIPP programs administered by the Office of Environmental Management (EM) of the U.S Department of Energy. JF - American Geophysical Union Fall Meeting AU - Herrick, C G AU - Schuhen, M AU - Kicker, D AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract EP53B EP - 0806 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680756659?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Vertical+flume+testing+of+WIPP+surrogate+waste+materials&rft.au=Herrick%2C+C+G%3BSchuhen%2C+M%3BKicker%2C+D%3BAnonymous&rft.aulast=Herrick&rft.aufirst=C&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Impact of hydrogeological and geomechanical properties on surface uplift at a CO2 injection site; parameter estimation and uncertainty quantification AN - 1680755888; 2015-043287 AB - It is essential to couple multiphase flow and geomechanical response in order to predict a consequence of geological storage of CO2. In this study, we estimate key hydrogeologic features to govern the geomechanical response (i.e., surface uplift) at a large-scale CO2 injection project at In Salah, Algeria using the Sierra Toolkit--a multi-physics simulation code developed at Sandia National Laboratories. Importantly, a jointed rock model is used to study the effect of postulated fractures in the injection zone on the surface uplift. The In Salah Gas Project includes an industrial-scale demonstration of CO2 storage in an active gas field where CO2 from natural gas production is being re-injected into a brine-filled portion of the structure downdip of the gas accumulation. The observed data include millimeter scale surface deformations (e.g., uplift) reported in the literature and injection well locations and rate histories provided by the operators. Our preliminary results show that the intrinsic permeability and Biot coefficient of the injection zone are important. Moreover pre-existing fractures within the injection zone affect the uplift significantly. Estimation of additional (i.e., anisotropy ratio) and coupled parameters will help us to develop models, which account for the complex relationship between mechanical integrity and CO2 injection-induced pressure changes. Uncertainty quantification of model predictions will be also performed using various algorithms including null-space Monte Carlo and polynomial-chaos expansion methods. This work will highlight that our coupled reservoir and geomechanical simulations associated with parameter estimation can provide a practical solution for designing operating conditions and understanding subsurface processes associated with the CO2 injection. JF - American Geophysical Union Fall Meeting AU - Newell, P AU - Yoon, H AU - Martinez, M J AU - Bishop, J E AU - Arnold, B W AU - Bryant, S AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H11M EP - 06 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680755888?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Impact+of+hydrogeological+and+geomechanical+properties+on+surface+uplift+at+a+CO2+injection+site%3B+parameter+estimation+and+uncertainty+quantification&rft.au=Newell%2C+P%3BYoon%2C+H%3BMartinez%2C+M+J%3BBishop%2C+J+E%3BArnold%2C+B+W%3BBryant%2C+S%3BAnonymous&rft.aulast=Newell&rft.aufirst=P&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Finite-difference algorithm for simulating 3D electromagnetic wavefields in conductive media AN - 1680750457; 2015-040948 AB - Electromagnetic (EM) wavefields are routinely used in geophysical exploration for detection and characterization of subsurface geological formations of economic interest. Recorded EM signals depend strongly on the current conductivity of geologic media. Hence, they are particularly useful for inferring fluid content of saturated porous bodies. In order to enhance understanding of field-recorded data, we are developing a numerical algorithm for simulating three-dimensional (3D) EM wave propagation and diffusion in heterogeneous conductive materials. Maxwell's equations are combined with isotropic constitutive relations to obtain a set of six, coupled, first-order partial differential equations governing the electric and magnetic vectors. An advantage of this system is that it does not contain spatial derivatives of the three medium parameters electric permittivity, magnetic permeability, and current conductivity. Numerical solution methodology consists of explicit, time-domain finite-differencing on a 3D staggered rectangular grid. Temporal and spatial FD operators have order 2 and N, where N is user-selectable. We use an artificially-large electric permittivity to maximize the FD timestep, and thus reduce execution time. For the low frequencies typically used in geophysical exploration, accuracy is not unduly compromised. Grid boundary reflections are mitigated via convolutional perfectly matched layers (C-PMLs) imposed at the six grid flanks. A shared-memory-parallel code implementation via OpenMP directives enables rapid algorithm execution on a multi-thread computational platform. Good agreement is obtained in comparisons of numerically-generated data with reference solutions. EM wavefields are sourced via point current density and magnetic dipole vectors. Spatially-extended inductive sources (current carrying wire loops) are under development. We are particularly interested in accurate representation of high-conductivity sub-grid-scale features that are common in industrial environments (borehole casing, pipes, railroad tracks). Present efforts are oriented toward calculating the EM responses of these objects via a First Born Approximation approach. JF - American Geophysical Union Fall Meeting AU - Aldridge, D F AU - Bartel, L C AU - Knox, Hunter A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract GP51C EP - 1086 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 26A:Economic geology, general, deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1680750457?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Finite-difference+algorithm+for+simulating+3D+electromagnetic+wavefields+in+conductive+media&rft.au=Aldridge%2C+D+F%3BBartel%2C+L+C%3BKnox%2C+Hunter+A%3BAnonymous&rft.aulast=Aldridge&rft.aufirst=D&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2016-10-25 N1 - CODEN - #07548 ER - TY - JOUR T1 - Recovering seismic Green's functions using icequake coda interferometry at Erebus Volcano, Antarctica AN - 1676579355; 2015-037166 AB - Seismic interferometry has emerged in the past decade as a powerful technique for interpreting passive seismic data and has been particularly useful for retrieving portions of elastic Green's functions in continental settings and for detailing structure and monitoring temporal variations at microseism periods (e.g., near 8 Hz) at volcanoes. Coda wave interferometry studies to retrieve body waves have previously been performed on Erebus volcano utilizing Strombolian eruption coda signals to image the internal structure of the volcano using short period body waves. Here we demonstrate that short-period surface and body wave Green's functions can also be recovered by correlating icequake coda signals on this highly glaciated volcano. A dense network of 99 short-period, three-component seismometers were deployed in a 3X3-km array surrounding the summit crater during the 2008-2009 austral summer. Coda data from 44 small, near-surface source icequakes (likely crevassing events) recorded during the month of December 2008 were cross-correlated revealing both body- and surface-wave portions of the Green's functions across the array. Recovery of Green's functions from a small number of icequakes lends merit to the utilization of icequake coda to enhance recovery of structural details and possible monitoring applications on glaciated volcanoes. JF - American Geophysical Union Fall Meeting AU - McMahon, N D AU - Chaput, J A AU - Knox, H A AU - Aster, R C AU - Kyle, P R AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S43B EP - 2516 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1676579355?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Recovering+seismic+Green%27s+functions+using+icequake+coda+interferometry+at+Erebus+Volcano%2C+Antarctica&rft.au=McMahon%2C+N+D%3BChaput%2C+J+A%3BKnox%2C+H+A%3BAster%2C+R+C%3BKyle%2C+P+R%3BAnonymous&rft.aulast=McMahon&rft.aufirst=N&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - High pressure and temperature electrical resistivity of iron and implications for planetary cores AN - 1673368701; 2015-033114 AB - Electrical resistivity measurements of polycrystalline iron have been performed at 5, 7 and 15 GPa and in the temperature range 293-2200 K by employing a four-wired method. The kinks in electrical resistivity associated with solid iron phase transitions and the solid to liquid transition were clearly observed upon increasing temperature. Geometry corrections due to volume variations with pressure and temperature were applied to the entire data set. High pressure and temperature thermal conductivity were calculated by fitting resistivity data through the Wiedemann-Franz law. The temperature dependences of electrical resistivity and thermal conductivity for alpha , gamma and epsilon solid iron have been determined at high pressure conditions. Our study provides the first experimental constraint on the heat flux conducted at Mercury's outmost core, estimated to be 0.29-0.36 TW, assuming an adiabatic core. Extrapolations of our data to Martian outer core conditions yield a series of heat transport parameters (eg. electrical resistivity, thermal conductivity and heat flux), which are in reasonable comparison with various geophysical estimates. JF - American Geophysical Union Fall Meeting AU - Deng, L AU - Seagle, C T AU - Fei, Y AU - Shahar, A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract DI34A EP - 04 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673368701?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=High+pressure+and+temperature+electrical+resistivity+of+iron+and+implications+for+planetary+cores&rft.au=Deng%2C+L%3BSeagle%2C+C+T%3BFei%2C+Y%3BShahar%2C+A%3BAnonymous&rft.aulast=Deng&rft.aufirst=L&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Linking material properties and microstructures to characterize damage associated with an underground explosion in granite AN - 1664436114; 2015-023154 AB - The Source Physics Experiment, conducted in granite in Nevada, is a series of explosive tests designed to study the generation and propagation of seismic waves. Extensive seismic monitoring and site rock characterization are being used to improve the predictive capability of models for detecting and characterizing underground explosions. Site rock characterization includes geomechanical and material properties testing, core-scale fracture identification, and optical microscopy studies. Geomechanical and material properties determined via laboratory testing of the site rocks include unconfined compressive strength, Young's modulus, Poisson's ratio, and bulk density. Detailed fracture mapping and characterization of meso- and micro-scale fractures in recovered cores are being conducted and include mineralization changes and the extent of crushed or fractured zone away from the source. We report on the analysis of microfractures in these cores, which provide a detailed and quantitative dataset on the extent and nature of damage in the recovered cores. Microfracture density and character (open, sealed, healed) are recorded in order to differentiate sets of microfractures associated with explosive tests. Densities (mf/mm) of open microfractures correlate with source-related damage, and increase from pre- to post-test samples. Microfracture densities are affected by pre-existing fractures, depending on fracture-zone mineralogy and alteration. These microfracture density data, linked to the bulk material properties, geomechanical properties, and the structural features of the rock at the core-scale, define a damage zone surrounding the source at depth. This link is essential to understanding how the bulk material properties manifest themselves in the rock and how that might affect energy propagation. Work by Los Alamos National Laboratory was sponsored by the National Nuclear Security Administration Award No. DE-AC52-06NA25946/NST10-NCNS-PD00. Work by National Security Technologies, LLC, was performed under Contract No. DE AC52 06NA25946 with the U.S. Department of Energy. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. LA-UR-13-26203. JF - American Geophysical Union Fall Meeting AU - Wilson, J E AU - Broome, S AU - Sussman, A J AU - Townsend, M AU - Schultz-Fellenz, E S AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S33B EP - 2421 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664436114?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Linking+material+properties+and+microstructures+to+characterize+damage+associated+with+an+underground+explosion+in+granite&rft.au=Wilson%2C+J+E%3BBroome%2C+S%3BSussman%2C+A+J%3BTownsend%2C+M%3BSchultz-Fellenz%2C+E+S%3BAnonymous&rft.aulast=Wilson&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Variation in hydraulic conductivity with decreasing pH in a biologically-clogged porous medium AN - 1664435187; 2015-025244 AB - Microbial biomass can clog porous media and ultimately affect both structural and mineral trapping of CO (sub 2) in geological carbon storage reservoirs. Whether biomass can remain intact following a sudden decrease in groundwater pH, a geochemical change associated with CO (sub 2) injection, is unclear. We examined this question using twelve biologically-active and three control column-reactor experiments. Cell abundance and distribution was monitored using confocal microscopy, plating, and direct counting. Hydraulic conductivity (K) was monitored using pressure sensors. Growth occurred for four days at neutral pH. During that time, K within the clogged portion of the reactors decreased from 0.013 to 0.0006 cm s (super -1) on average, a 1.47 log reduction. Next, the pH of the inflowing aqueous medium was lowered to pH 4 in six experiments and pH 5.7 in six experiments. As a result, K increased in five of the pH 4 experiments and two of the pH 5.7 experiments. Despite this increase, however, the columns remained largely clogged. Compared to pre-inoculation K values, log reductions averaged 1.13 and 1.44 in pH 4 and pH 5.7 experiments, respectively. Our findings show that biomass can largely remain intact following acidification and continue to reduce K, even when considerable cell stress and death occurs. This material is based upon work supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Altman, S J AU - Kirk, M F AU - Santillan, E U AU - McGrath, L K AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract B13A EP - 0455 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664435187?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Variation+in+hydraulic+conductivity+with+decreasing+pH+in+a+biologically-clogged+porous+medium&rft.au=Altman%2C+S+J%3BKirk%2C+M+F%3BSantillan%2C+E+U%3BMcGrath%2C+L+K%3BAnonymous&rft.aulast=Altman&rft.aufirst=S&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Site characterization of the source physics experiment phase II location using seismic reflection data AN - 1664434719; 2015-023163 AB - An objective of the Source Physics Experiment (SPE) is to identify low-yield nuclear explosions from a regional distance. Low-yield nuclear explosions can often be difficult to discriminate among the clutter of natural and man-made explosive events (e.g., earthquakes and mine blasts). The SPE is broken into three phases. Phase I has provided the first of the physics-based data to test the empirical models that have been used to discriminate nuclear events. The Phase I series of tests were placed within a highly fractured granite body. The evolution of the project has led to development of Phase II, to be placed within the opposite end member of geology, an alluvium environment, thereby increasing the database of waveforms to build upon in the discrimination models. Both the granite and alluvium sites have hosted nearby nuclear tests, which provide comparisons for the chemical test data. Phase III of the SPE is yet to be determined. For Phase II of the experiment, characterization of the location is required to develop the geologic/geophysical models for the execution of the experiment. Criteria for the location are alluvium thickness of approximately 170 m and a water table below 170 m; minimal fracturing would be ideal. A P-wave mini-vibroseis survey was conducted at a potential site in alluvium to map out the subsurface geology. The seismic reflection profile consisted of 168 geophone stations, spaced 5 m apart. The mini-vibe was a 7,000-lb peak-force source, starting 57.5 m off the north end of the profile and ending 57.5 m past the southern-most geophone. The length of the profile was 835 m. The source points were placed every 5 m, equally spaced between geophones to reduce clipping. The vibroseis sweep was from 20 Hz down to 180 Hz over 8 seconds, and four sweeps were stacked at each shot location. The shot gathers show high signal-to-noise ratios with clear first arrivals across the entire spread and the suggestion of some shallow reflectors. The data were processed using Seismic Processing Workshop in a standard reflection processing flow. The results from this vibroseis survey will contribute to the characterization of the location for Phase II of the SPE in order to appropriately execute the experiment. JF - American Geophysical Union Fall Meeting AU - Sexton, E A AU - Snelson, C M AU - Chipman, V AU - Emer, D F AU - White, R L AU - Emmitt, R AU - Wright, A A AU - Drellack, S AU - Huckins-Gang, H AU - Mercadante, J AU - Floyd, M AU - McGowin, C AU - Cothrun, C AU - Bonal, N AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S33B EP - 2430 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664434719?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Site+characterization+of+the+source+physics+experiment+phase+II+location+using+seismic+reflection+data&rft.au=Sexton%2C+E+A%3BSnelson%2C+C+M%3BChipman%2C+V%3BEmer%2C+D+F%3BWhite%2C+R+L%3BEmmitt%2C+R%3BWright%2C+A+A%3BDrellack%2C+S%3BHuckins-Gang%2C+H%3BMercadante%2C+J%3BFloyd%2C+M%3BMcGowin%2C+C%3BCothrun%2C+C%3BBonal%2C+N%3BAnonymous&rft.aulast=Sexton&rft.aufirst=E&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Using spectral losses to map a damage zone for the source physics experiments (SPE) AN - 1664434180; 2015-023155 AB - We performed a series of cross-borehole seismic experiments in support of the Source Physics Experiments (SPE). These surveys, which were conducted in a granitic body using a sparker source and hydrophone string, were designed to image the damage zone from two underground explosions (SPE2 and SPE3). We present results here from a total of six boreholes (the explosive shot emplacement hole and 5 satellite holes, 20-35 meters away) where we found a marked loss of high frequency energy in ray paths traversing the region near the SPE explosions. Specifically, the frequencies above approximately 400 Hz were lost in a region centered around 45 meters depth, coincident with SPE2 and SPE3 shots. We further quantified these spectral losses, developed a map of where they occur, and evaluated the attenuation effects of raypath length (i.e. source-receiver offset). We attribute this severe attenuation to the inelastic damage (i.e. cracking and pulverizing) caused by the large chemical explosions and propose that frequency attenuation of this magnitude provides yet another tool for detecting the damage due to large underground explosions. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Knox, H A AU - Abbott, R E AU - Bonal, N AU - Preston, L A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S33B EP - 2422 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664434180?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Using+spectral+losses+to+map+a+damage+zone+for+the+source+physics+experiments+%28SPE%29&rft.au=Knox%2C+H+A%3BAbbott%2C+R+E%3BBonal%2C+N%3BPreston%2C+L+A%3BAnonymous&rft.aulast=Knox&rft.aufirst=H&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Numerical and theoretical analyses of underground explosion cavity decoupling AN - 1664434173; 2015-023148 AB - It has long been established that the amplitudes of seismic waves radiated from an underground explosion can be reduced by detonating the explosive within a fluid-filled cavity of adequate size. Significant amplitude reduction occurs because the reflection coefficient at the fluid/rock interface (i.e., the cavity wall) is large. In fact, the DC frequency limit of the reflection coefficient for a spherically-diverging seismic wave incident upon a concentric spherical interface is -1.0, independent of radius of curvature and all material properties. In order to quantify to the degree of amplitude reduction expected in various realistic scenarios, we are conducting mathematical and numerical investigations into the so-called "cavity decoupling problem" for a buried explosion. Our working tool is a numerical algorithm for simulating fully-coupled seismic and acoustic wave propagation in mixed solid/fluid media. Solution methodology involves explicit, time-domain, finite differencing of the elastodynamic velocity-stress partial differential system on a three-dimensional staggered spatial grid. Conditional logic is used to avoid shear stress updating within fluid zones; this approach leads to computational efficiency gains for models containing a significant proportion of ideal fluid. Numerical stability and accuracy are maintained at air/rock interfaces (where the contrast in mass density is on the order of 1 to 2000) via an FD operator "order switching" formalism. The fourth-order spatial FD operator used throughout the bulk of the earth model is reduced to second-order in the immediate vicinity of a high-contrast interface. Point explosions detonated at the center of an air-filled or water-filled spherical cavity lead to strong resonant oscillations in radiated seismic energy, with period controlled by cavity radius and sound speed of the fill fluid. If the explosion is off-center, or the cavity is non-spherical, shear waves are generated in the surrounding elastic wholespace. Equilibrating the moment magnitudes of explosions for differing fill materials leads to misleading results in the amplitudes of the radiated elastic waves. The proper procedure entails equalizing the intrinsic energies of the explosions. Numerically-calculated results are in reasonable agreement with a theoretical model based on acoustic and elastic spherical wave propagation from a point center of symmetry. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the US Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Jensen, R AU - Aldridge, D F AU - Chael, E P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S33B EP - 2415 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664434173?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Numerical+and+theoretical+analyses+of+underground+explosion+cavity+decoupling&rft.au=Jensen%2C+R%3BAldridge%2C+D+F%3BChael%2C+E+P%3BAnonymous&rft.aulast=Jensen&rft.aufirst=R&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Seismic characterization using joint body wave, surface wave and gravity inversion AN - 1664433162; 2015-023162 AB - As part of the ongoing series of Source Physics Experiments (SPE), we have developed a local-to-regional scale seismic model using a joint inversion of travel times from P- and S-body waves, surface wave dispersion curves and gravity measurements. Over 800,000 travel times collected from local earthquakes and active sources, including three SPE shots, were augmented with approximately 25,000 on-site gravity measurements and fundamental mode Rayleigh wave dispersion curves, derived from analysis of ambient noise cross-correlograms among pairs of stations in the area. These data are combined in a linearized iterative tomographic inversion procedure to solve for the optimal 3-D P- and S-wave velocity structures and hypocentral locations given the travel times and subject to model smoothness constraints. A density-P-wave-velocity relation is assumed in order to predict gravity values and the sensitivity of P-wave velocity to gravity perturbations. Both P- and S-wave sensitivities are utilized to connect surface wave dispersion measurements to the 3-D velocity structure. In general, the top 1-2 km of the surface is relatively poorly sampled by the body waves alone, especially for S-waves due to the lack of controlled S sources. However, the addition of gravity and surface waves to the body wave dataset greatly enhances structural resolvability at this shallow depth. Both basins and ranges that were not resolved at all with the body-wave-only dataset become clearly resolved when these complementary data are utilized, showing excellent correlation with topography and known shallow structural features. We will present the results of this joint inversion as well as resolution and error analyses of these results. This work was sponsored by the NNSA under award number DE-AC52-06NA25946. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Preston, L A AU - Chael, E P AU - Hipp, J R AU - Ballard, S AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract S33B EP - 2429 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664433162?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Seismic+characterization+using+joint+body+wave%2C+surface+wave+and+gravity+inversion&rft.au=Preston%2C+L+A%3BChael%2C+E+P%3BHipp%2C+J+R%3BBallard%2C+S%3BAnonymous&rft.aulast=Preston&rft.aufirst=L&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-03-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Seismic spatial autocorrelation as a technique to track changes in the permafrost active layer AN - 1566814786; 2014-076167 AB - We present preliminary results from an effort to continuously track freezing and thawing of the permafrost active layer using a small-aperture seismic array. The 7-element array of three-component posthole seismometers is installed on permafrost at Poker Flat Research Range, near Fairbanks, Alaska. The array is configured in two three-station circles with 75 and 25 meter radii that share a common center station. This configuration is designed to resolve omnidirectional, high-frequency seismic microtremor (i.e. ambient noise). Microtremor is continuously monitored and the data are processed using the spatial autocorrelation (SPAC) method. The resulting SPAC coefficients are then inverted for shear-wave velocity structure versus depth. Thawed active-layer soils have a much slower seismic velocity than frozen soils, allowing us to track the depth and intensity of thawing. Persistent monitoring on a permanent array would allow for a way to investigate year-to-year changes without costly site visits. Results from the seismic array will compared to, and correlated with, other measurement techniques, such as physical probing and remote sensing methods. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Abbott, R E AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract C43A EP - 0661 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566814786?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Seismic+spatial+autocorrelation+as+a+technique+to+track+changes+in+the+permafrost+active+layer&rft.au=Abbott%2C+R+E%3BAnonymous&rft.aulast=Abbott&rft.aufirst=R&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Comparison of ensemble filtering algorithms and null-space Monte Carlo for parameter estimation and uncertainty quantification using CO (sub 2) sequestration data AN - 1520104937; 2014-028388 AB - Geological storage of CO (sub 2) requires multiphase flow models coupled with key hydrogeologic features to accurately predict the long-term consequences. The prediction uncertainty during geological CO (sub 2) storage requires a computationally efficient and practically useful framework. This paper presents a comparative study between ensemble-based filtering algorithms (En-As) and calibration-constrained null-space Monte Carlo (NSMC) methods. For the En-As, we use the ensemble Kalman filter (EnKF), ensemble smoother (ES), ES with multiple data assimilation (ES-MDA), and EnKF and ES with the pilot point method. For the NSMC calibrated models with various parameterization, schemes are tested and single and multiple NSMC (M-NSMC) methods are used. A synthetic case with two layers was developed to mimic an actual CO (sub 2) injection pilot test where one injection and two observation wells are located within a short distance. Observed data include bottom hole pressure at injection well and gas saturation (S (sub g) ) at two observation wells in the upper layer. Model parameters include horizontal permeability and porosity. Comparison of results shows that both methodologies yield good history match and reasonable prediction results in a computationally efficient way. In particular, the ES-MDA and M-NSMC resulted in smaller objective function values and lower prediction uncertainties of S (sub g) profiles compared to other variants tested in this work. The En-As with the pilot point method have higher variability of permeability compared to those without one, but the En-As show smoother permeability fields compared to the NSMC methods. This is because stochastic randomness at a grid scale was included to generate NSMC fields. Both ensemble-based and NSMC algorithms are unable to correct the structural orientation of the prior ensemble members using only the sparse dynamic data from wells, while they obtain reasonable history match, suggesting that structural uncertainty should be incorporated into prior information. Overall, the ES-MDA has an advantage in terms of computational efficiency, but at the expense of additional computation M-NSMC shows applicability for highly nonlinear problems such as multiphase flow problems. Abstract Copyright (2013), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Tavakoli, Reza AU - Yoon, Hongkyu AU - Delshad, Mojdeh AU - Elsheikh, Ahmed H AU - Wheeler, Mary F AU - Arnold, Bill W Y1 - 2013/12// PY - 2013 DA - December 2013 SP - 8108 EP - 8127 PB - American Geophysical Union, Washington, DC VL - 49 IS - 12 SN - 0043-1397, 0043-1397 KW - carbon sequestration KW - numerical models KW - underground storage KW - engineering properties KW - Bayesian analysis KW - Monte Carlo analysis KW - statistical analysis KW - Kalman filters KW - prediction KW - fluid flow KW - mathematical models KW - geostatistics KW - calibration KW - carbon dioxide KW - digital simulation KW - underground installations KW - multiphase flow KW - algorithms KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520104937?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Comparison+of+ensemble+filtering+algorithms+and+null-space+Monte+Carlo+for+parameter+estimation+and+uncertainty+quantification+using+CO+%28sub+2%29+sequestration+data&rft.au=Tavakoli%2C+Reza%3BYoon%2C+Hongkyu%3BDelshad%2C+Mojdeh%3BElsheikh%2C+Ahmed+H%3BWheeler%2C+Mary+F%3BArnold%2C+Bill+W&rft.aulast=Tavakoli&rft.aufirst=Reza&rft.date=2013-12-01&rft.volume=49&rft.issue=12&rft.spage=8108&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2F2013WR013959 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 80 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2014-07-17 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - algorithms; Bayesian analysis; calibration; carbon dioxide; carbon sequestration; digital simulation; engineering properties; fluid flow; geostatistics; Kalman filters; mathematical models; Monte Carlo analysis; multiphase flow; numerical models; prediction; statistical analysis; underground installations; underground storage DO - http://dx.doi.org/10.1002/2013WR013959 ER - TY - JOUR T1 - Decision framework for evaluating the macroeconomic risks and policy impacts of cyber attacks AN - 1496886425; 19001220 AB - Increased reliance on the Internet for critical infrastructure and the global nature of supply chains provides an opportunity for adversaries to leverage dependencies and gain access to vital infrastructure. Traditional approaches to assessing risk in the cyber domain, including estimation of impacts, fall short due to uncertainty in how interconnected systems react to cyber attack. This paper describes a method to represent the pathways of disruption propagation, evaluate the macroeconomic impact of cyber threats and aid in selecting among various cybersecurity policies. Based on state of the art agent-based modeling, multicriteria decision analysis, and macroeconomic modeling tools, this framework provides dynamic macroeconomic, demographic and fiscal insights regarding shocks caused by cyber attacks to the regional economy over time. The interlinkage of these models will provide a robust and adaptive system that allows policy makers to evaluate complex issues such as cybersecurity threats and their impacts on the geopolitical, social, environmental, and macroeconomic landscape. JF - Environment Systems & Decisions AU - Kelic, Andjelka AU - Collier, Zachary A AU - Brown, Christopher AU - Beyeler, Walter E AU - Outkin, Alexander V AU - Vargas, Vanessa N AU - Ehlen, Mark A AU - Judson, Christopher AU - Zaidi, Ali AU - Leung, Billy AU - Linkov, Igor AD - Sandia National Laboratories, Albuquerque, NM, USA akelic@sandia.gov Y1 - 2013/12// PY - 2013 DA - December 2013 SP - 544 EP - 560 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 33 IS - 4 SN - 2194-5403, 2194-5403 KW - Environmental Engineering Abstracts (EN); Computer and Information Systems Abstracts (CI); CSA / ASCE Civil Engineering Abstracts (CE) KW - Infrastructure KW - Risk KW - Policies KW - Mathematical models KW - Economics KW - Computer information security KW - Internet KW - Dynamics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1496886425?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environment+Systems+%26+Decisions&rft.atitle=Decision+framework+for+evaluating+the+macroeconomic+risks+and+policy+impacts+of+cyber+attacks&rft.au=Kelic%2C+Andjelka%3BCollier%2C+Zachary+A%3BBrown%2C+Christopher%3BBeyeler%2C+Walter+E%3BOutkin%2C+Alexander+V%3BVargas%2C+Vanessa+N%3BEhlen%2C+Mark+A%3BJudson%2C+Christopher%3BZaidi%2C+Ali%3BLeung%2C+Billy%3BLinkov%2C+Igor&rft.aulast=Kelic&rft.aufirst=Andjelka&rft.date=2013-12-01&rft.volume=33&rft.issue=4&rft.spage=544&rft.isbn=&rft.btitle=&rft.title=Environment+Systems+%26+Decisions&rft.issn=21945403&rft_id=info:doi/10.1007%2Fs10669-013-9479-9 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-03-01 N1 - Number of references - 66 N1 - Last updated - 2016-08-08 DO - http://dx.doi.org/10.1007/s10669-013-9479-9 ER - TY - JOUR T1 - CO (sub 2) -induced shift in microbial activity affects carbon trapping and water quality in anoxic bioreactors AN - 1464887610; 2013-093501 AB - Microbial activity is a potentially important yet poorly understood control on the fate and environmental impact of CO (sub 2) that leaks into aquifers from deep storage reservoirs. In this study we examine how variation in CO (sub 2) abundance affected competition between Fe(III) and SO (sub 4) (super 2-) -reducers in anoxic bioreactors inoculated with a mixed-microbial community from a freshwater aquifer. We performed two sets of experiments: one with low CO (sub 2) partial pressure ( approximately 0.02 atm) in the headspace of the reactors and one with high CO (sub 2) partial pressure ( approximately 1atm). A fluid residence time of 35 days was maintained in the reactors by replacing one-fifth of the aqueous volume with fresh medium every seven days. The aqueous medium was composed of groundwater amended with small amounts of acetate (250mu M), phosphate (1mu M), and ammonium (50mu M) to stimulate microbial activity. Synthetic goethite (1 mmol) and SO (sub 4) (super 2-) (500mu M influent concentration) were also available in each reactor to serve as electron acceptors. Results of this study show that higher CO (sub 2) abundance increased the ability of Fe(III) reducers to compete with SO (sub 4) (super 2-) reducers, leading to significant shifts in CO (sub 2) trapping and water quality. Mass-balance calculations and pyrosequencing results demonstrate that SO (sub 4) (super 2-) reducers were dominant in reactors with low CO (sub 2) content. They consumed 85% of the acetate after acetate consumption reached steady state while Fe(III) reducers consumed only 15% on average. In contrast, Fe(III) reducers were dominant during that same interval in reactors with high CO (sub 2) content, consuming at least 90% of the acetate while SO (sub 4) (super 2-) reducers consumed a negligible amount (<1%). The higher rate of Fe(III) reduction in the high-CO (sub 2) bioreactors enhanced CO (sub 2) solubility trapping relative to the low-CO (sub 2) bioreactors by increasing alkalinity generation (6X). Hence, the shift in microbial activity we observed was a positive feedback on CO (sub 2) trapping. More rapid Fe(III) reduction degraded water quality, however, by leading to high Fe(II) concentration. Abstract Copyright (2013) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Kirk, Matthew F AU - Santillan, Eugenio F U AU - Sanford, Robert A AU - Altman, Susan J Y1 - 2013/12/01/ PY - 2013 DA - 2013 Dec 01 SP - 198 EP - 208 PB - Elsevier, New York, NY VL - 122 SN - 0016-7037, 0016-7037 KW - United States KW - water quality KW - east-central Illinois KW - mass spectra KW - fresh water KW - ground water KW - carbon dioxide KW - mineral composition KW - mass balance KW - carbon KW - leaky aquifers KW - alkalinity KW - spectra KW - reduction KW - chemical composition KW - water pollution KW - Mahomet Aquifer KW - Illinois KW - secondary minerals KW - biochemistry KW - pollution KW - solubility KW - hydrochemistry KW - aquifers KW - ICP mass spectra KW - biogenic processes KW - traps KW - bioreactors KW - microorganisms KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1464887610?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=CO+%28sub+2%29+-induced+shift+in+microbial+activity+affects+carbon+trapping+and+water+quality+in+anoxic+bioreactors&rft.au=Kirk%2C+Matthew+F%3BSantillan%2C+Eugenio+F+U%3BSanford%2C+Robert+A%3BAltman%2C+Susan+J&rft.aulast=Kirk&rft.aufirst=Matthew&rft.date=2013-12-01&rft.volume=122&rft.issue=&rft.spage=198&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2013.08.018 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 65 N1 - PubXState - NY N1 - Document feature - illus. N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-12-05 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - alkalinity; aquifers; biochemistry; biogenic processes; bioreactors; carbon; carbon dioxide; chemical composition; east-central Illinois; fresh water; ground water; hydrochemistry; ICP mass spectra; Illinois; leaky aquifers; Mahomet Aquifer; mass balance; mass spectra; microorganisms; mineral composition; pollution; reduction; secondary minerals; solubility; spectra; traps; United States; water pollution; water quality DO - http://dx.doi.org/10.1016/j.gca.2013.08.018 ER - TY - JOUR T1 - System Security: Rethinking Security for Facilities with Nuclear Materials AN - 1671601314; 20460470 AB - Security at facilities holding special nuclear materials (SNM) has been a concern since the discovery of fission and more countries pursuing nuclear power as an alternative energy source (the United Arab Emirates and Vietnam, e.g.) or developing suspected nuclear weapons programs (North Korea and Iran, e.g.) only increases the pressure to develop effective security systems. Two recent, high-profile incidents - the 2007 armed incursion of South Africa's Pelindaba Nuclear Research Center [1] and the 2012 security breach at the U.S. Y-12 National Security Complex in Tennessee [2] - make this pressure a stark reality. The first demonstrates the advanced capabilities of today's adversaries and the second the ability for mild-mannered protesters to defeat an 'insurmountable' security system - both cases illustrate shortcomings in traditional approaches to nuclear security. JF - Transactions of the American Nuclear Society AU - Williams, Adam D AD - Engineering Systems Division, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139; Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185-1234 adwilli@mit.edu Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 1946 EP - 1947 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear power KW - Security KW - Nuclear research KW - Security systems KW - Alternative energy sources KW - Nuclear weapons KW - Vietnam KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671601314?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=System+Security%3A+Rethinking+Security+for+Facilities+with+Nuclear+Materials&rft.au=Williams%2C+Adam+D&rft.aulast=Williams&rft.aufirst=Adam&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=1946&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2015-04-09 ER - TY - JOUR T1 - Deep Borehole Disposal of Nuclear Waste AN - 1671585420; 20460183 AB - Spent fuel and other nuclear waste can potentially be disposed of in boreholes ~ 5 km deep using modified oil and gas drilling technology. Radionuclide isolation in the bottom 2 km disposal zone of crystalline basement rock (Figure 1) is favored by the scarcity of water, low permeabilities, reducing conditions, and a thermohaline density stratification. Deep borehole disposal is also attractive because it might be implemented in a modular and/or regional manner. Siting should be easier than traditional mined geologic repositories because many areas possess the requisite characteristics: tectonically stable regions that have low heat flow and crystalline basement rock within 3 km of the surface. JF - Transactions of the American Nuclear Society AU - Arnold, Bill W AU - Brady, Patrick V AU - MacKinnon, Robert J AD - Sandia National Laboratories, 1515 Eubank SE, Albuquerque, NM 87185-0747 Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 921 EP - 922 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Modular KW - Nuclear waste KW - Rock KW - Density KW - Crystal structure KW - Basements KW - Waste disposal KW - Boreholes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671585420?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Deep+Borehole+Disposal+of+Nuclear+Waste&rft.au=Arnold%2C+Bill+W%3BBrady%2C+Patrick+V%3BMacKinnon%2C+Robert+J&rft.aulast=Arnold&rft.aufirst=Bill&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=921&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2015-04-09 ER - TY - JOUR T1 - Experimental Measurement of Uranium Hexafluoride Enrichment using Fast Neutron Spectroscopy AN - 1671574793; 20460208 AB - Safeguards activities at uranium enrichment facilities require accurate, independent measurements of uranium mass for each UF sub(6) cylinder with contents that are either a process input or output. Current technology tends to rely upon gamma measurements (186 keV from super(235)U decay) or thermal neutron counting using super(3)He detectors [1]. Both methods are sensitive to geometrical perturbations of the UF sub(6) within the cylinder, giving rise to potentially significant systematic measurement uncertainties; also, given the short path length of low-energy gammas and neutrons through UF sub(6), these methods tend to be insensitive to material in the center of the cylinder. In the context of international safeguards, it is undesirable to rely upon a measurement technique that is effectively a measurement of the outer material skin; a full-volume assay is important for material balance at an enrichment facility. JF - Transactions of the American Nuclear Society AU - Kiff, Scott AU - Gerling, Mark AU - Marleau, Peter AU - Mrowka, Stanley AU - Streicher, Michael AD - Sandia National Laboratories, 7011 East Avenue, Livermore, CA 94550 skiff@sandia.gov Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 1013 EP - 1016 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Solid State and Superconductivity Abstracts (SO); Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Uranium hexafluoride KW - Fast neutrons KW - Cylinders KW - Uranium KW - Thermal neutrons KW - Decay KW - Enrichment KW - Counting UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671574793?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Experimental+Measurement+of+Uranium+Hexafluoride+Enrichment+using+Fast+Neutron+Spectroscopy&rft.au=Kiff%2C+Scott%3BGerling%2C+Mark%3BMarleau%2C+Peter%3BMrowka%2C+Stanley%3BStreicher%2C+Michael&rft.aulast=Kiff&rft.aufirst=Scott&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=1013&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2015-04-09 ER - TY - JOUR T1 - Source Term Evaluation for a Spent Fuel Reprocessing Facility AN - 1567093987; 20460184 AB - Spent fuel reprocessing is a backend fuel cycle option that has been employed in several countries. In the U.S., there is no commercial spent fuel reprocessing facility currently in operation. However, the U.S. has had two facilities that were built in the mid-1960s to early 1970s. The Atomic Energy Commission, the predecessor of Nuclear Regulatory Commission (NRC), used 10 CFR Part 50 to grant an operating license for the Nuclear Fuel Services reprocessing facility at West Valley, New York, in 1966 and to issue a construction permit for the Barnwell Nuclear Fuel Plant (BNFP) Separation Facility in 1970 [1]. Only the West Valley facility was operated for a period of time. The BNFP was built but never operated. JF - Transactions of the American Nuclear Society AU - Bixler, Nathan E AU - Louie, David AU - Gelbard, Fred AD - Sandia National Laboratories, PO Box 5800, Albuquerque, NM, 87185 nbixler@sandia.gov Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 923 EP - 925 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Regulatory agencies KW - Construction KW - Fuel cycles KW - Nuclear fuels KW - Licenses KW - Reprocessing KW - Valleys KW - Spent fuels UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567093987?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Source+Term+Evaluation+for+a+Spent+Fuel+Reprocessing+Facility&rft.au=Bixler%2C+Nathan+E%3BLouie%2C+David%3BGelbard%2C+Fred&rft.aulast=Bixler&rft.aufirst=Nathan&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=923&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2014-11-05 ER - TY - JOUR T1 - A Basic Principles Approach for Determining Radionuclide Aerosol Releases from Accidental Explosions in Reprocessing Facilities AN - 1567088039; 20460185 AB - Spent nuclear fuel reprocessing is a back-end fuel cycle option for recovering useable actinides and reducing the volume of high-level radioactive waste. The chemical processing involves several steps that under accident situations may result in the release of radioactive respirable aerosol. An overview of the issues with modeling hypothetical accidents in reprocessing facilities is given in a companion paper [1]. A common feature in some of these accidents is that an explosive mixture is formed in a processing vessel, and the explosion not only ruptures the vessel but also aerosolizes some of the contents of the vessel. These accidents have been well documented, but data on the aerosol concentration and particle size distribution of the aerosol formed have not been found. Furthermore, we also have not found aerosol data for systems of the scale typical of reprocessing facilities. Clearly for safety analysis, determining the generation of aerosol particles as a function of the processing fluid properties, equipment dimension, and explosive energy are needed. JF - Transactions of the American Nuclear Society AU - Gelbard, Fred AU - Brown, Alexander L AU - Louie, David L Y AU - Feng, Chengcheng AU - Bixler, Nathan E AD - Sandia National Laboratories: 1515 Eubank SE, Albuquerque, NM 87123 Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 926 EP - 927 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Radioactive waste KW - Aerosols KW - Accidents KW - Explosive forming KW - Vessels KW - Reprocessing KW - Accidental release KW - Explosions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567088039?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=A+Basic+Principles+Approach+for+Determining+Radionuclide+Aerosol+Releases+from+Accidental+Explosions+in+Reprocessing+Facilities&rft.au=Gelbard%2C+Fred%3BBrown%2C+Alexander+L%3BLouie%2C+David+L+Y%3BFeng%2C+Chengcheng%3BBixler%2C+Nathan+E&rft.aulast=Gelbard&rft.aufirst=Fred&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=926&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2014-11-05 ER - TY - JOUR T1 - Benchmark Experiments in Water-Moderated Fully-Reflected 6.90% Enriched UO sub(2) Fuel Rod Lattices with a Fuel-to-Water Volume Ratio of 0.52 AN - 1567059929; 20460318 AB - The Seven Percent Critical Experiment (7uPCX) was designed to provide benchmark criticality and reactor physics data for water-moderated pin-fueled nuclear reactor cores. The enrichment of the fuel was chosen to explore the enrichment range above the current 5% ceiling for US commercial PWRs. The experiment was part of the US Department of Energy (DOE) Nuclear Energy Research Initiative (NERI) Project 01-124 titled "Reactor Physics and Criticality Benchmark Evaluations for Advanced Nuclear Fuel" [1]. JF - Transactions of the American Nuclear Society AU - Harms, Gary A AU - Miller, Allison D AU - Ford, John T AD - Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185-1146 gaharms@sandia.gov Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 1416 EP - 1420 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear reactors KW - Energy (nuclear) KW - Fuels KW - Benchmarking KW - Enrichment KW - Ceilings KW - Reactor physics KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567059929?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Benchmark+Experiments+in+Water-Moderated+Fully-Reflected+6.90%25+Enriched+UO+sub%282%29+Fuel+Rod+Lattices+with+a+Fuel-to-Water+Volume+Ratio+of+0.52&rft.au=Harms%2C+Gary+A%3BMiller%2C+Allison+D%3BFord%2C+John+T&rft.aulast=Harms&rft.aufirst=Gary&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=1416&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2014-11-05 ER - TY - JOUR T1 - Results and Insights from the US HRA Empirical Study AN - 1567059067; 20460489 AB - As an effort to improve the robustness of human reliability analysis (HRA), the US Nuclear Regulatory Commission (NRC) participated and supported the International HRA Empirical Study [1-4] (referred to as the International Study in the paper), in which HRA predictions of different analysts and methods were compared to observed crew performance data at Halden Reactor Project's HAMMLAB (HAlden huMan-Machine LABoratory) simulator facilities. The study produced important findings; however, since there was only one case in the International Study where the same HRA method was applied by different teams, it was difficult to clearly separate method specific effects from variability created by the analysts' application of a given method. Therefore, the US HRA Empirical Study (referred to as the US Study in the paper), which was performed on a US nuclear power plant (NPP) simulator, was conducted to improve the insights developed from the International Study. One major objective of the study was to test the consistency and accuracy of HRA predictions among different analyst teams using the same methods JF - Transactions of the American Nuclear Society AU - Liao, Huafei AU - Forester, John AU - Dang, Vinh N AU - Bye, Andreas AU - Lois, Erasmia AU - Chang, James AD - Sandia National Laboratories, Albuquerque, NM, USA, 87185 hnliao@sandia.gov Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 2019 EP - 2022 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Production methods KW - Paper KW - Nuclear power generation KW - Simulation KW - Robustness KW - Consistency KW - Empirical analysis KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567059067?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Results+and+Insights+from+the+US+HRA+Empirical+Study&rft.au=Liao%2C+Huafei%3BForester%2C+John%3BDang%2C+Vinh+N%3BBye%2C+Andreas%3BLois%2C+Erasmia%3BChang%2C+James&rft.aulast=Liao&rft.aufirst=Huafei&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=2019&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2014-11-05 ER - TY - JOUR T1 - A 500-kiloton airburst over Chelyabinsk and an enhanced hazard from small impactors AN - 1469629325; 2013-098164 JF - Nature (London) AU - Brown, P G AU - Assink, J D AU - Astiz, L AU - Blaauw, R AU - Boslough, M B AU - Borovicka, J AU - Brachet, N AU - Brown, D AU - Campbell-Brown, M AU - Ceranna, L AU - Cooke, W AU - de Groot-Hedlin, C AU - Drob, D P AU - Edwards, W AU - Evers, L G AU - Garces, M AU - Gill, J AU - Hedlin, M AU - Kingery, A AU - Laske, G AU - Le Pichon, A AU - Mialle, P AU - Moser, D E AU - Saffer, A AU - Silber, E AU - Smets, P AU - Spalding, R E AU - Spurny, P AU - Tagliaferri, E AU - Uren, D AU - Weryk, R J AU - Whitaker, R AU - Krzeminski, Z Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 238 EP - 241 PB - Macmillan Journals, London VL - 503 IS - 7475 SN - 0028-0836, 0028-0836 KW - overpressure KW - power law KW - geologic hazards KW - asteroids KW - explosions KW - damage KW - bolides KW - atmosphere KW - Russian Federation KW - frequency KW - impacts KW - airbursts KW - Chelyabinsk Meteorite KW - models KW - meteors KW - brightness KW - meteorites KW - Chelyabinsk Russian Federation KW - Commonwealth of Independent States KW - natural hazards KW - nuclear explosions KW - energy KW - 05B:Petrology of meteorites and tektites KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469629325?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+%28London%29&rft.atitle=A+500-kiloton+airburst+over+Chelyabinsk+and+an+enhanced+hazard+from+small+impactors&rft.au=Brown%2C+P+G%3BAssink%2C+J+D%3BAstiz%2C+L%3BBlaauw%2C+R%3BBoslough%2C+M+B%3BBorovicka%2C+J%3BBrachet%2C+N%3BBrown%2C+D%3BCampbell-Brown%2C+M%3BCeranna%2C+L%3BCooke%2C+W%3Bde+Groot-Hedlin%2C+C%3BDrob%2C+D+P%3BEdwards%2C+W%3BEvers%2C+L+G%3BGarces%2C+M%3BGill%2C+J%3BHedlin%2C+M%3BKingery%2C+A%3BLaske%2C+G%3BLe+Pichon%2C+A%3BMialle%2C+P%3BMoser%2C+D+E%3BSaffer%2C+A%3BSilber%2C+E%3BSmets%2C+P%3BSpalding%2C+R+E%3BSpurny%2C+P%3BTagliaferri%2C+E%3BUren%2C+D%3BWeryk%2C+R+J%3BWhitaker%2C+R%3BKrzeminski%2C+Z&rft.aulast=Brown&rft.aufirst=P&rft.date=2013-11-14&rft.volume=503&rft.issue=7475&rft.spage=238&rft.isbn=&rft.btitle=&rft.title=Nature+%28London%29&rft.issn=00280836&rft_id=info:doi/10.1038%2Fnature12741 L2 - http://www.nature.com/nature/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 27 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2013-12-20 N1 - CODEN - NATUAS N1 - SubjectsTermNotLitGenreText - airbursts; asteroids; atmosphere; bolides; brightness; Chelyabinsk Meteorite; Chelyabinsk Russian Federation; Commonwealth of Independent States; damage; energy; explosions; frequency; geologic hazards; impacts; meteorites; meteors; models; natural hazards; nuclear explosions; overpressure; power law; Russian Federation DO - http://dx.doi.org/10.1038/nature12741 ER - TY - JOUR T1 - Younger Dryas impact model confuses comet facts, defies airburst physics; discussion AN - 1524612497; 2014-033414 JF - Proceedings of the National Academy of Sciences of the United States of America AU - Boslough, Mark AU - Harris, Alan W AU - Chapman, Clark AU - Morrison, David Y1 - 2013/11/05/ PY - 2013 DA - 2013 Nov 05 SP - 1 PB - National Academy of Sciences, Washington, DC VL - 110 IS - 45 SN - 0027-8424, 0027-8424 KW - physics KW - Russian Federation KW - temperature KW - upper Pleistocene KW - Cenozoic KW - upper Weichselian KW - Tunguska Basin KW - spatial distribution KW - melting KW - Commonwealth of Independent States KW - Weichselian KW - velocity KW - Younger Dryas KW - Asia KW - shock waves KW - Earth KW - Quaternary KW - trajectories KW - Shoemaker-Levy 9 Comet KW - atmosphere KW - impacts KW - airbursts KW - comets KW - Pleistocene KW - stratigraphic boundary KW - 24:Quaternary geology KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524612497?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.atitle=Younger+Dryas+impact+model+confuses+comet+facts%2C+defies+airburst+physics%3B+discussion&rft.au=Boslough%2C+Mark%3BHarris%2C+Alan+W%3BChapman%2C+Clark%3BMorrison%2C+David&rft.aulast=Boslough&rft.aufirst=Mark&rft.date=2013-11-05&rft.volume=110&rft.issue=45&rft.spage=E4170&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.issn=00278424&rft_id=info:doi/10.1073%2Fpnas.1313495110 L2 - http://www.ncbi.nlm.nih.gov/pmc/journals/2/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 5 N1 - PubXState - DC N1 - SuppNotes - For reference to originals see Wittke, J. H., et. al., Proceedings of the National Academy of Sciences of the United States of America, Vol. 110, No. 23, p. E2088-E2097, DOI: 10.1073/pnas.1301760110, 2013; and Firestone, R. B., et. al., Proceedings of the National Academy of Sciences of the United States of America, Vol. 104, No. 41, p. 16016-16021, DOI: 10.1073/pnas.0706977104, 2007 N1 - Last updated - 2014-05-15 N1 - CODEN - PNASA6 N1 - SubjectsTermNotLitGenreText - airbursts; Asia; atmosphere; Cenozoic; comets; Commonwealth of Independent States; Earth; impacts; melting; physics; Pleistocene; Quaternary; Russian Federation; shock waves; Shoemaker-Levy 9 Comet; spatial distribution; stratigraphic boundary; temperature; trajectories; Tunguska Basin; upper Pleistocene; upper Weichselian; velocity; Weichselian; Younger Dryas DO - http://dx.doi.org/10.1073/pnas.1313495110 ER - TY - CPAPER T1 - Droplet Microfluidic Systems For Single Cell Whole Genome Amplificiation T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490520726; 6253827 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Rhee, Minsoung AU - Meagher, Robert AU - Light, Yooli AU - Yilmaz, Suzan AU - Sustarich, Jess AU - Singh, Anup Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Genomes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490520726?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Droplet+Microfluidic+Systems+For+Single+Cell+Whole+Genome+Amplificiation&rft.au=Rhee%2C+Minsoung%3BMeagher%2C+Robert%3BLight%2C+Yooli%3BYilmaz%2C+Suzan%3BSustarich%2C+Jess%3BSingh%2C+Anup&rft.aulast=Rhee&rft.aufirst=Minsoung&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - A Parametric Study of Light-Duty Natural Gas Vehicle Competitiveness in the United States Through 2050 T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490520534; 6253643 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Peterson, Meghan AU - Barter, Garrett AU - West, Todd AU - Manley, Dawn Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - USA UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490520534?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=A+Parametric+Study+of+Light-Duty+Natural+Gas+Vehicle+Competitiveness+in+the+United+States+Through+2050&rft.au=Peterson%2C+Meghan%3BBarter%2C+Garrett%3BWest%2C+Todd%3BManley%2C+Dawn&rft.aulast=Peterson&rft.aufirst=Meghan&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Mechanical Strengthening of Poly(ethylene terephthalate) By Nitration T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490518864; 6252348 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Dial, Brent AU - Pinon III, Victor AU - Dirk, Shawn AU - Anderson, Benjamin Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Nitration UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490518864?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Mechanical+Strengthening+of+Poly%28ethylene+terephthalate%29+By+Nitration&rft.au=Dial%2C+Brent%3BPinon+III%2C+Victor%3BDirk%2C+Shawn%3BAnderson%2C+Benjamin&rft.aulast=Dial&rft.aufirst=Brent&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Modeling Polyurethane Foam Expansion and Cure T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490516288; 6249856 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Mondy, Lisa AU - Rao, Rekha AU - Celina, Mathew AU - Wyatt, Nicholas AU - Grillet, Anne AU - O'Hern, Timothy AU - Soehnel, Melissa AU - Russick, Edward Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - polyurethane UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490516288?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Modeling+Polyurethane+Foam+Expansion+and+Cure&rft.au=Mondy%2C+Lisa%3BRao%2C+Rekha%3BCelina%2C+Mathew%3BWyatt%2C+Nicholas%3BGrillet%2C+Anne%3BO%27Hern%2C+Timothy%3BSoehnel%2C+Melissa%3BRussick%2C+Edward&rft.aulast=Mondy&rft.aufirst=Lisa&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Synthesis of Nanoporous Palladium Powder With Controlled Pore and Particle Size for Hydrogen Storage Applications T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490516255; 6249610 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Cappillino, Patrick AU - Jones, Christopher AU - Hattar, Khalid AU - Clark, Blythe AU - Hekmaty, Michelle AU - Jacobs, Benjamin AU - Robinson, David Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Hydrogen UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490516255?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Synthesis+of+Nanoporous+Palladium+Powder+With+Controlled+Pore+and+Particle+Size+for+Hydrogen+Storage+Applications&rft.au=Cappillino%2C+Patrick%3BJones%2C+Christopher%3BHattar%2C+Khalid%3BClark%2C+Blythe%3BHekmaty%2C+Michelle%3BJacobs%2C+Benjamin%3BRobinson%2C+David&rft.aulast=Cappillino&rft.aufirst=Patrick&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Atomistic Molecular Dynamics Simulations of Precise Ionomers T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490514566; 6252247 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Bolintineanu, Dan AU - Stevens, Mark AU - Frischknecht, Amalie Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Simulation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490514566?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Atomistic+Molecular+Dynamics+Simulations+of+Precise+Ionomers&rft.au=Bolintineanu%2C+Dan%3BStevens%2C+Mark%3BFrischknecht%2C+Amalie&rft.aulast=Bolintineanu&rft.aufirst=Dan&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Towards a Scalable, Strongly Coupled Core Simulator for Light Water Nuclear Reactors T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490514193; 6252428 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Pawlowski, Roger AU - Hooper, Russell Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Nuclear reactors UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490514193?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Towards+a+Scalable%2C+Strongly+Coupled+Core+Simulator+for+Light+Water+Nuclear+Reactors&rft.au=Pawlowski%2C+Roger%3BHooper%2C+Russell&rft.aulast=Pawlowski&rft.aufirst=Roger&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Insights Into Ionic Liquids Pretreatment On Lignocellulosic Biomass From Molecular Modeling Studies T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490514060; 6252251 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Parthasarathi, Ramakrishnan AU - Shi, Jian AU - Sun, Ning AU - Sale, Kenneth AU - Simmons, Blake AU - Singh, Seema Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Biomass UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490514060?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Insights+Into+Ionic+Liquids+Pretreatment+On+Lignocellulosic+Biomass+From+Molecular+Modeling+Studies&rft.au=Parthasarathi%2C+Ramakrishnan%3BShi%2C+Jian%3BSun%2C+Ning%3BSale%2C+Kenneth%3BSimmons%2C+Blake%3BSingh%2C+Seema&rft.aulast=Parthasarathi&rft.aufirst=Ramakrishnan&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Metal Complexes With Redox-Active Ligands As High Energy Density Nonaqueous Redox Flow Battery Electrolytes T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490512631; 6249407 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Cappillino, Patrick AU - Pratt III, Harry AU - Hudak, Nicholas AU - Tomson, Neil AU - Anderson, Travis AU - Anstey, Mitchell Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490512631?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Metal+Complexes+With+Redox-Active+Ligands+As+High+Energy+Density+Nonaqueous+Redox+Flow+Battery+Electrolytes&rft.au=Cappillino%2C+Patrick%3BPratt+III%2C+Harry%3BHudak%2C+Nicholas%3BTomson%2C+Neil%3BAnderson%2C+Travis%3BAnstey%2C+Mitchell&rft.aulast=Cappillino&rft.aufirst=Patrick&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Microdevices and Materials for Genomic Analysis of Single Microbial Cells T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490510159; 6251072 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Meagher, Robert AU - Light, Yooli AU - Yilmaz, Suzan AU - Rhee, Minsoung AU - Singh, Anup AU - Liu, Peng Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Genomic analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490510159?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Microdevices+and+Materials+for+Genomic+Analysis+of+Single+Microbial+Cells&rft.au=Meagher%2C+Robert%3BLight%2C+Yooli%3BYilmaz%2C+Suzan%3BRhee%2C+Minsoung%3BSingh%2C+Anup%3BLiu%2C+Peng&rft.aulast=Meagher&rft.aufirst=Robert&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Modeling Hydrogen Transport Into Palladium Hydride With Detailed Surface Reaction Chemistry T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490509431; 6250399 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Salloum, Maher AU - James, Scott AU - Robinson, David Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Hydrogen UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490509431?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Modeling+Hydrogen+Transport+Into+Palladium+Hydride+With+Detailed+Surface+Reaction+Chemistry&rft.au=Salloum%2C+Maher%3BJames%2C+Scott%3BRobinson%2C+David&rft.aulast=Salloum&rft.aufirst=Maher&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Polyoxometalate Antiplasticization of An Epoxy Cured Thermoset Network T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490509079; 6250670 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Anderson, Benjamin Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Chemical engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490509079?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Polyoxometalate+Antiplasticization+of+An+Epoxy+Cured+Thermoset+Network&rft.au=Anderson%2C+Benjamin&rft.aulast=Anderson&rft.aufirst=Benjamin&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Rheology, Adhesion, and Debonding of Lightly Cross-Linked Polymer Gels T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490508967; 6250668 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Wyatt, Nicholas AU - Grillet, Anne Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Adhesion UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490508967?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Rheology%2C+Adhesion%2C+and+Debonding+of+Lightly+Cross-Linked+Polymer+Gels&rft.au=Wyatt%2C+Nicholas%3BGrillet%2C+Anne&rft.aulast=Wyatt&rft.aufirst=Nicholas&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Semi-Preparative Isotachoporesis for Fractionation of RNA From Blood T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490505213; 6251718 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Meagher, Robert Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Fractionation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490505213?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Semi-Preparative+Isotachoporesis+for+Fractionation+of+RNA+From+Blood&rft.au=Meagher%2C+Robert&rft.aulast=Meagher&rft.aufirst=Robert&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Modeling of Liquid-Liquid Extraction for Uranyl Nitrate Separation T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490503915; 6252562 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Rao, Rekha AU - Jove-Colon, Carlos AU - Moffat, Harry Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Nitrate UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490503915?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Modeling+of+Liquid-Liquid+Extraction+for+Uranyl+Nitrate+Separation&rft.au=Rao%2C+Rekha%3BJove-Colon%2C+Carlos%3BMoffat%2C+Harry&rft.aulast=Rao&rft.aufirst=Rekha&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Molecular Dynamics Simulations of Alkanethiol-Coated Gold Nanoparticles T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490503144; 6251037 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Bolintineanu, Dan AU - Lane, J AU - Grest, Gary Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Simulation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490503144?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Molecular+Dynamics+Simulations+of+Alkanethiol-Coated+Gold+Nanoparticles&rft.au=Bolintineanu%2C+Dan%3BLane%2C+J%3BGrest%2C+Gary&rft.aulast=Bolintineanu&rft.aufirst=Dan&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Simulation Tools for Nanoparticle-Based Composite Processing and Property Prediction T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490503135; 6251042 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Bolintineanu, Dan AU - Lechman, Jeremy AU - Schunk, P Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Prediction UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490503135?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Simulation+Tools+for+Nanoparticle-Based+Composite+Processing+and+Property+Prediction&rft.au=Bolintineanu%2C+Dan%3BLechman%2C+Jeremy%3BSchunk%2C+P&rft.aulast=Bolintineanu&rft.aufirst=Dan&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Direct Observation of Effective Atomic Diffusion Distances In Zr/2Al Multilayers Due To Self-Propagating Reactions T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490502714; 6253102 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Reeves, Robert AU - Kotula, Paul AU - Adams, David Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Diffusion UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490502714?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Direct+Observation+of+Effective+Atomic+Diffusion+Distances+In+Zr%2F2Al+Multilayers+Due+To+Self-Propagating+Reactions&rft.au=Reeves%2C+Robert%3BKotula%2C+Paul%3BAdams%2C+David&rft.aulast=Reeves&rft.aufirst=Robert&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - JOUR T1 - Helpful or Harmful? Potential Effects of Exercise on Select Inflammatory Conditions AN - 1560102548; 20248516 AB - Inflammation has been characterized as a double-edged sword, requiring a balance between health as maintained by regular exercise and activities that would exacerbate inflammatory diseases. The influence of exercise on inflammation is complex and has been widely studied in both healthy patient populations as well as populations of patients with many inflammatory and/or autoimmune rheumatic diseases. Inflammatory markers can be affected by the type of exercise and muscle contraction, as well as the intensity, duration, and consistency of the exercise sessions. Because of these potentially important effects, many members of the general public, as well as some clinicians, believe that exercise could exacerbate symptoms and accelerate the progression of such conditions. The effects of different types of exercise have been studied among patients with inflammatory conditions such as ankylosing spondylitis, systemic lupus erythematosus, rheumatoid arthritis, osteoarthritis, fibromyalgia, and idiopathic inflammatory myopathies, as well as congestive heart failure, type 2 diabetes mellitus, and metabolic syndrome, which are considered low-grade systemic inflammatory diseases. This review will help exercise professionals and clinicians understand the effects of exercise on inflammatory markers, as well as offer effective treatment options and recommendations for patients exercising with rheumatic or inflammatory conditions. JF - Physician and Sportsmedicine AU - Thomas, Jennifer L AD - Health Educator, Sandia National Laboratories, Albuquerque, NM; Department of Health, Exercise, and Sports Sciences, University of New Mexico, Albuquerque, NM, jothling@unm.edu Y1 - 2013/11// PY - 2013 DA - Nov 2013 SP - 93 EP - 100 PB - McGraw-Hill Inc., McGraw-Hill Building, 1221 Avenue of the Americas New York NY 10020 United States VL - 41 IS - 4 SN - 0091-3847, 0091-3847 KW - Physical Education Index KW - inflammation KW - exercise KW - rheumatic diseases KW - cytokines KW - physical activity KW - Exercise (duration) KW - Exercise (intensity) KW - Arthritis KW - Patients KW - Health KW - Diseases KW - Activities KW - Inflammation KW - Diabetes KW - PE 030:Exercise, Health & Physical Fitness UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560102548?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aphysicaleducation&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Physician+and+Sportsmedicine&rft.atitle=Helpful+or+Harmful%3F+Potential+Effects+of+Exercise+on+Select+Inflammatory+Conditions&rft.au=Thomas%2C+Jennifer+L&rft.aulast=Thomas&rft.aufirst=Jennifer&rft.date=2013-11-01&rft.volume=41&rft.issue=4&rft.spage=93&rft.isbn=&rft.btitle=&rft.title=Physician+and+Sportsmedicine&rft.issn=00913847&rft_id=info:doi/10.3810%2Fpsm.2013.11.2040 LA - English DB - Physical Education Index N1 - Date revised - 2014-09-01 N1 - Last updated - 2015-04-02 N1 - SubjectsTermNotLitGenreText - Exercise (duration); Exercise (intensity); Arthritis; Health; Patients; Diseases; Activities; Diabetes; Inflammation DO - http://dx.doi.org/10.3810/psm.2013.11.2040 ER - TY - JOUR T1 - Generating reproducible microscale heterogeneity for transmitted-light flow visualization experiments AN - 1477830721; 2014-002229 AB - We developed and evaluated a new approach for constructing reproducible, "geologically realistic" heterogeneity for near-two-dimensional transmitted-light experiments. By using an apparatus with a computer-controlled arm, mixtures of sand were deposited in an experimental chamber through a tube. Mechanical segregation processes within the tube and the chamber led to stratification that mimicked that produced by sedimentary processes. By varying the arm speed, stratum thickness and angle could be controlled. By using different sand mixtures, the grain size at the top and bottom of a stratum could be varied. Through the use of carefully designed computer programs, a variety of reproducible microheterogeneous and macroheterogeneous structures could be produced. A spectral evaluation of 10 sample chambers produced with a single program showed negligible differences between sample chambers. JF - Vadose Zone Journal AU - Griffith, B Clark AU - Holt, Robert M AU - Glass, Robert J Y1 - 2013/11// PY - 2013 DA - November 2013 SP - 8 PB - Soil Science Society of America, Madison, WI VL - 12 IS - 4 KW - segregation KW - optical spectra KW - thin sections KW - physical models KW - layered materials KW - visualization KW - size distribution KW - scale models KW - transport KW - sampling KW - sediments KW - thickness KW - spectra KW - sedimentary structures KW - cross-bedding KW - sand KW - near two-dimensional models KW - experimental studies KW - clastic sediments KW - grain size KW - sedimentation KW - porosity KW - two-dimensional models KW - transmitted light method KW - planar bedding structures KW - optical properties KW - heterogeneous materials KW - stratification KW - microlayering KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1477830721?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Generating+reproducible+microscale+heterogeneity+for+transmitted-light+flow+visualization+experiments&rft.au=Griffith%2C+B+Clark%3BHolt%2C+Robert+M%3BGlass%2C+Robert+J&rft.aulast=Griffith&rft.aufirst=B&rft.date=2013-11-01&rft.volume=12&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0182 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2014-01-01 N1 - Number of references - 33 N1 - PubXState - WI N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2014-01-16 N1 - SubjectsTermNotLitGenreText - clastic sediments; cross-bedding; experimental studies; grain size; heterogeneous materials; layered materials; microlayering; near two-dimensional models; optical properties; optical spectra; physical models; planar bedding structures; porosity; sampling; sand; scale models; sedimentary structures; sedimentation; sediments; segregation; size distribution; spectra; stratification; thickness; thin sections; transmitted light method; transport; two-dimensional models; visualization DO - http://dx.doi.org/10.2136/vzj2011.0182 ER - TY - JOUR T1 - Multiphase hydrodynamic lubrication flow using a three-dimensional shell finite element model AN - 1475524645; 18810042 AB - Reynolds' lubrication theory has been widely used to study thin-region fluid flows for a variety of scientific and manufacturing applications. In this work, we set forth an extension of this theory to model the effect of free fluid interfaces and fluid-structural interactions in lubrication films. This model is implemented using curvilinear shell elements in a general three-dimensional finite element code, allowing the study of lubrication flows in arbitrarily complex geometries. This implementation also allows coupling with continuum mechanics, such as solid body deformation, through lubrication-based and fluid-structural interactions. Simulations using this model are compared to analytical solutions and experimental results for a number of model problems. JF - Computers & Fluids AU - Roberts, SA AU - Noble AU - Benner, E M AU - Schunk, PR AD - Thermal and Fluid Processes Department, Sandia National Laboratories, PO Box 5800, MS-0836, Albuquerque, NM 87185-0836, United States, sarober@sandia.gov Y1 - 2013/10/25/ PY - 2013 DA - 2013 Oct 25 SP - 12 EP - 25 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 87 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Hydrodynamics KW - Fluid Flow KW - Computers KW - Interfaces KW - Solids KW - Model Studies KW - Finite Element Method KW - Fluid flow KW - Films KW - Deformation KW - Modelling KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475524645?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computers+%26+Fluids&rft.atitle=Multiphase+hydrodynamic+lubrication+flow+using+a+three-dimensional+shell+finite+element+model&rft.au=Roberts%2C+SA%3BNoble%3BBenner%2C+E+M%3BSchunk%2C+PR&rft.aulast=Roberts&rft.aufirst=SA&rft.date=2013-10-25&rft.volume=87&rft.issue=&rft.spage=12&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Hydrodynamics; Fluid flow; Modelling; Deformation; Fluid Flow; Interfaces; Computers; Finite Element Method; Solids; Films; Model Studies ER - TY - JOUR T1 - Using the suspension balance model in a finite-element flow solver AN - 1475524524; 18810047 AB - A suspension balance model (SBM) is implemented to describe the shear-driven migration of particles in noncolloidal suspensions in the context of a finite element (FE) solver. Before developing the FE methodology, the SBM is analyzed in the context of a rigorous two-phase averaging procedure, in which the traditional SBM model can be thought of as an approximate closure relationship for the rigorous two-phase equations. It is shown that the standard SBM equations are inconsistent, which is demonstrated analytically for the case of Couette flow. A FE model is developed using a corrected set of SBM equations, and the numerical techniques needed to handle the anisotropic Q-tensor and FE stabilization are detailed. The resultant FE-SBM method is tested using a Couette geometry and compared with existing models and experiments. A high level of sensitivity of the particle migration to the chosen viscosity model is noted, as well as the influence of excess diffusion caused by the FE stabilization procedure. The FE-SBM method is also used in conjunction with an arbitrary Lagrangian-Eulerian formulation to simulate the deflection of the free surface in a Couette cell. Secondary flows are observed in the free-surface simulation results, and the underlying mechanisms driving these secondary flows are explored. JF - Computers & Fluids AU - Clausen, J R AD - Sandia National Laboratories, Albuquerque, NM 87185, United States, jclause@sandia.gov Y1 - 2013/10/25/ PY - 2013 DA - 2013 Oct 25 SP - 67 EP - 78 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 87 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Suspension KW - Mathematical models KW - Computers KW - Model Testing KW - Deflection KW - Migration KW - Stabilizing KW - Model Studies KW - Resuspended sediments KW - Viscosity KW - Couette flow KW - Standards KW - Free Surfaces KW - Modelling KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475524524?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computers+%26+Fluids&rft.atitle=Using+the+suspension+balance+model+in+a+finite-element+flow+solver&rft.au=Clausen%2C+J+R&rft.aulast=Clausen&rft.aufirst=J&rft.date=2013-10-25&rft.volume=87&rft.issue=&rft.spage=67&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Resuspended sediments; Mathematical models; Couette flow; Deflection; Stabilizing; Modelling; Viscosity; Suspension; Computers; Standards; Model Testing; Migration; Free Surfaces; Model Studies ER - TY - JOUR T1 - A multiscale DEM-LBM analysis on permeability evolutions inside a dilatant shear band AN - 1637542530; 2014-104273 AB - This paper presents a multiscale analysis of a dilatant shear band using a three-dimensional discrete element method and a lattice Boltzmann/finite element hybrid scheme. In particular, three-dimensional simple shear tests are conducted via the discrete element method. A spatial homogenization is performed to recover the macroscopic stress from the micro-mechanical force chains. The pore geometries of the shear band and host matrix are quantitatively evaluated through morphology analyses and lattice Boltzmann/finite element flow simulations. Results from the discrete element simulations imply that grain sliding and rotation occur predominately with the shear band. These granular motions lead to dilation of pore space inside the shear band and increases in local permeability. While considerable anisotropy in the contact fabric is observed with the shear band, anisotropy of the permeability is, at most, modest in the assemblies composed of spherical grains. Copyright 2013 Springer-Verlag Berlin Heidelberg and Springer-Verlag Berlin Heidelberg (outside the USA) JF - Acta Geotechnica (Berlin) AU - Sun, Waiching AU - Kuhn, Matthew R AU - Rudnicki, John W Y1 - 2013/10// PY - 2013 DA - October 2013 SP - 465 EP - 480 PB - Springer-Verlag, co-published with Versita, Heidelberg-Berlin VL - 8 IS - 5 SN - 1861-1125, 1861-1125 KW - soil mechanics KW - sand KW - discrete element analysis KW - lattice KW - three-dimensional models KW - strain KW - clastic sediments KW - stress KW - mechanical properties KW - mathematical models KW - deformation KW - bifurcation KW - boundary conditions KW - granular materials KW - dilatancy KW - shear KW - sediments KW - constitutive equations KW - permeability KW - anisotropy KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542530?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Acta+Geotechnica+%28Berlin%29&rft.atitle=A+multiscale+DEM-LBM+analysis+on+permeability+evolutions+inside+a+dilatant+shear+band&rft.au=Sun%2C+Waiching%3BKuhn%2C+Matthew+R%3BRudnicki%2C+John+W&rft.aulast=Sun&rft.aufirst=Waiching&rft.date=2013-10-01&rft.volume=8&rft.issue=5&rft.spage=465&rft.isbn=&rft.btitle=&rft.title=Acta+Geotechnica+%28Berlin%29&rft.issn=18611125&rft_id=info:doi/10.1007%2Fs11440-013-0210-2 L2 - http://www.springerlink.com/content/1861-1133/?p LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 45 N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - anisotropy; bifurcation; boundary conditions; clastic sediments; constitutive equations; deformation; dilatancy; discrete element analysis; granular materials; lattice; mathematical models; mechanical properties; permeability; sand; sediments; shear; soil mechanics; strain; stress; three-dimensional models DO - http://dx.doi.org/10.1007/s11440-013-0210-2 ER - TY - JOUR T1 - Zinc and nickel removal in limestone-based treatment of acid mine drainage; the relative role of adsorption and co-precipitation AN - 1502293201; 2014-014094 AB - Mining influenced water may contain high metal and sulfate loads, and have low pH (acid mine drainage). Removal of these metals prior to environmental discharge is critical to maintain ecosystem vitality. Limestone based passive treatment systems are commonly used for pH neutralization. The same conditions that lead to pH neutralization may also remove a substantial amount of metals from solution, but the connection between treatment conditions and metal removal are not well understood. In this study, zinc and nickel removals are quantified in batch reactor simulated limestone treatment of acid mine drainage. The resulting solid phase is characterized with a sequential extraction procedure, and the removals are interpreted using surface complexation and surface precipitation models. Zinc and nickel removals are closely linked to the initial iron concentration in the mine water, but are also affected by pH, alkalinity, calcium and sulfate concentrations. The surface complexation model was based on literature descriptions of hydrous ferric oxide. In order to obtain a sufficient fit to the data, the surface site density was increased to an unrealistically high value. Uptake data was also fit to an existing surface precipitation model. The values used are similar to those found in previous studies. Both models indicate that adsorption is not the dominant removal process in the treatment system. Using adsorption only models will generally underpredict metal removals within limestone based treatment systems. Abstract Copyright (2013) Elsevier, B.V. JF - Applied Geochemistry AU - Miller, Andrew AU - Wildeman, Thomas AU - Figueroa, Linda Y1 - 2013/10// PY - 2013 DA - October 2013 SP - 57 EP - 63 PB - Elsevier, Oxford-New York-Beijing VL - 37 SN - 0883-2927, 0883-2927 KW - limestone KW - zinc KW - PHREEQC KW - acid mine drainage KW - pollutants KW - complexing KW - pollution KW - adsorption KW - simulation KW - remediation KW - models KW - sedimentary rocks KW - precipitation KW - metals KW - water treatment KW - sequential extraction KW - nickel KW - carbonate rocks KW - water pollution KW - pH KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502293201?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Geochemistry&rft.atitle=Zinc+and+nickel+removal+in+limestone-based+treatment+of+acid+mine+drainage%3B+the+relative+role+of+adsorption+and+co-precipitation&rft.au=Miller%2C+Andrew%3BWildeman%2C+Thomas%3BFigueroa%2C+Linda&rft.aulast=Miller&rft.aufirst=Andrew&rft.date=2013-10-01&rft.volume=37&rft.issue=&rft.spage=57&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/10.1016%2Fj.apgeochem.2013.07.001 L2 - http://www.sciencedirect.com/science/journal/08832927 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 26 N1 - Document feature - illus. incl. 6 tables N1 - Last updated - 2014-02-27 N1 - SubjectsTermNotLitGenreText - acid mine drainage; adsorption; carbonate rocks; complexing; limestone; metals; models; nickel; pH; PHREEQC; pollutants; pollution; precipitation; remediation; sedimentary rocks; sequential extraction; simulation; water pollution; water treatment; zinc DO - http://dx.doi.org/10.1016/j.apgeochem.2013.07.001 ER - TY - JOUR T1 - Snow shielding factors for cosmogenic nuclide dating inferred from Monte Carlo neutron transport simulations AN - 1492588441; 2014-007662 AB - Conventional formulations of changes in cosmogenic nuclide production rates with snow cover are based on a mass-shielding approach, which neglects the role of neutron moderation by hydrogen. This approach can produce erroneous correction factors and add to the uncertainty of the calculated cosmogenic exposure ages. We use a Monte Carlo particle transport model to simulate fluxes of secondary cosmic-ray neutrons near the surface of the Earth and vary surface snow depth to show changes in neutron fluxes above rock or soil surface. To correspond with shielding factors for spallation and low-energy neutron capture, neutron fluxes are partitioned into high-energy, epithermal and thermal components. The results suggest that high-energy neutrons are attenuated by snow cover at a significantly higher rate (shorter attenuation length) than indicated by the commonly-used mass-shielding formulation. As thermal and epithermal neutrons derive from the moderation of high-energy neutrons, the presence of a strong moderator such as hydrogen in snow increases the thermal neutron flux both within the snow layer and above it. This means that low-energy production rates are affected by snow cover in a manner inconsistent with the mass-shielding approach and those formulations cannot be used to compute snow correction factors for nuclides produced by thermal neutrons. Additionally, as above-ground low-energy neutron fluxes vary with snow cover as a result of reduced diffusion from the ground, low-energy neutron fluxes are affected by snow even if the snow is at some distance from the site where measurements are made. Abstract Copyright (2013) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Zweck, Christopher AU - Zreda, Marek AU - Desilets, Darin Y1 - 2013/10/01/ PY - 2013 DA - 2013 Oct 01 SP - 64 EP - 71 PB - Elsevier, Amsterdam VL - 379 SN - 0012-821X, 0012-821X KW - volcanic rocks KW - snow cover KW - isotopes KW - igneous rocks KW - granites KW - halogens KW - cosmogenic elements KW - dolostone KW - simulation KW - production KW - exposure age KW - sedimentary rocks KW - radioactive isotopes KW - plutonic rocks KW - mass shielding KW - chronology KW - snow KW - basalts KW - absolute age KW - cosmic rays KW - uncertainty KW - spallation KW - chlorine KW - Monte Carlo analysis KW - Cl-36 KW - statistical analysis KW - neutrons KW - corrections KW - carbonate rocks KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492588441?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Earth+and+Planetary+Science+Letters&rft.atitle=Snow+shielding+factors+for+cosmogenic+nuclide+dating+inferred+from+Monte+Carlo+neutron+transport+simulations&rft.au=Zweck%2C+Christopher%3BZreda%2C+Marek%3BDesilets%2C+Darin&rft.aulast=Zweck&rft.aufirst=Christopher&rft.date=2013-10-01&rft.volume=379&rft.issue=&rft.spage=64&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2013.07.023 L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 38 N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-01-30 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - absolute age; basalts; carbonate rocks; chlorine; chronology; Cl-36; corrections; cosmic rays; cosmogenic elements; dolostone; exposure age; granites; halogens; igneous rocks; isotopes; mass shielding; Monte Carlo analysis; neutrons; plutonic rocks; production; radioactive isotopes; sedimentary rocks; simulation; snow; snow cover; spallation; statistical analysis; uncertainty; volcanic rocks DO - http://dx.doi.org/10.1016/j.epsl.2013.07.023 ER - TY - JOUR T1 - Reactive Rayleigh-Taylor turbulent mixing: a one-dimensional-turbulence study AN - 1464598361; 18789294 AB - We study the problem of reactive Rayleigh-Taylor turbulence in the Boussinesq framework using one-dimensional-turbulence (ODT) simulations. In this problem a reaction zone between overlying heavy/cold reactants and underlying light/hot products moves against gravity. First, we show that ODT results for global quantities in non-reactive Rayleigh-Taylor turbulence are within those from direct numerical simulations (DNS). This comparison give us confidence in using ODT to study unexplored flow regimes in the reactive case. Then, we show how ODT predicts an early stage of reactive Rayleigh-Taylor turbulence that behaves similarly to the non-reactive case, as observed in previous DNS. More importantly, ODT indicates a later stage where the growth of the reaction zone reduces considerably. The present work can be seen as a step towards the study of supernova flames with ODT. JF - Geophysical and Astrophysical Fluid Dynamics AU - Gonzalez-Juez, ED AU - Kerstein, A R AU - Lignell, DO AD - Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551, USA, estebandgj@gmail.com Y1 - 2013/10/01/ PY - 2013 DA - 2013 Oct 01 SP - 506 EP - 525 PB - Taylor & Francis Group Ltd., 2 Park Square Oxford OX14 4RN United Kingdom VL - 107 IS - 5 SN - 0309-1929, 0309-1929 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Hydrological Regime KW - Hydrodynamics KW - Supernova KW - Growth Stages KW - Turbulent mixing KW - turbulence KW - Mixing KW - Growth KW - Numerical simulations KW - Fluid dynamics KW - Boussinesq approximation KW - SW 0810:General KW - M2 524:Stars, Universe (524) KW - Q2 09183:Physics and chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1464598361?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+and+Astrophysical+Fluid+Dynamics&rft.atitle=Reactive+Rayleigh-Taylor+turbulent+mixing%3A+a+one-dimensional-turbulence+study&rft.au=Gonzalez-Juez%2C+ED%3BKerstein%2C+A+R%3BLignell%2C+DO&rft.aulast=Gonzalez-Juez&rft.aufirst=ED&rft.date=2013-10-01&rft.volume=107&rft.issue=5&rft.spage=506&rft.isbn=&rft.btitle=&rft.title=Geophysical+and+Astrophysical+Fluid+Dynamics&rft.issn=03091929&rft_id=info:doi/10.1080%2F03091929.2012.736504 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-12-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Growth; Fluid dynamics; Boussinesq approximation; Numerical simulations; Supernova; Turbulent mixing; Hydrological Regime; Hydrodynamics; Growth Stages; turbulence; Mixing DO - http://dx.doi.org/10.1080/03091929.2012.736504 ER - TY - CPAPER T1 - Electromechanical Emulation of Hydrokinetic Generators for Renewable Energy Research T2 - OCEANS 201313 MTS/IEEE Conference in San Diego AN - 1441646706; 6237332 JF - OCEANS 201313 MTS/IEEE Conference in San Diego AU - Neely, Jason AU - Ruehl, Kelley AU - Roberts, Jesse AU - Glover, Steven AU - White, Forest AU - Horry, Michael Y1 - 2013/09/23/ PY - 2013 DA - 2013 Sep 23 KW - Resource management KW - Renewable energy KW - Conservation KW - Environment management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1441646706?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=OCEANS+201313+MTS%2FIEEE+Conference+in+San+Diego&rft.atitle=Electromechanical+Emulation+of+Hydrokinetic+Generators+for+Renewable+Energy+Research&rft.au=Neely%2C+Jason%3BRuehl%2C+Kelley%3BRoberts%2C+Jesse%3BGlover%2C+Steven%3BWhite%2C+Forest%3BHorry%2C+Michael&rft.aulast=Neely&rft.aufirst=Jason&rft.date=2013-09-23&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=OCEANS+201313+MTS%2FIEEE+Conference+in+San+Diego&rft.issn=&rft_id=info:doi/ L2 - http://www.oceans13mtsieeesandiego.org/glance.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-30 N1 - Last updated - 2013-11-11 ER - TY - JOUR T1 - Multi-sensor magnetoencephalography with atomic magnetometers AN - 1823946032; PQ0001754075 AB - The authors have detected magnetic fields from the human brain with two independent, simultaneously operating rubidium spin-exchange-relaxation-free magnetometers. Evoked responses from auditory stimulation were recorded from multiple subjects with two multi-channel magnetometers located on opposite sides of the head. Signal processing techniques enabled by multi-channel measurements were used to improve signal quality. This is the first demonstration of multi-sensor atomic magnetometer magnetoencephalography and provides a framework for developing a non-cryogenic, whole-head magnetoencephalography array for source localization. JF - Physics in Medicine & Biology AU - Johnson, Cort N AU - Schwindt, P D D AU - Weisend, M AD - Sandia National Laboratories, PO Box 5800, Albuquerque, NM 87185-1082, USA, cort.johnson@alum.mit.edu Y1 - 2013/09/07/ PY - 2013 DA - 2013 Sep 07 SP - 6065 EP - 6077 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 58 IS - 17 SN - 0031-9155, 0031-9155 KW - Biotechnology and Bioengineering Abstracts KW - Magnetoencephalography KW - Magnetic fields KW - Data processing KW - Head KW - Brain KW - Rubidium KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1823946032?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Physics+in+Medicine+%26+Biology&rft.atitle=Multi-sensor+magnetoencephalography+with+atomic+magnetometers&rft.au=Johnson%2C+Cort+N%3BSchwindt%2C+P+D+D%3BWeisend%2C+M&rft.aulast=Johnson&rft.aufirst=Cort&rft.date=2013-09-07&rft.volume=58&rft.issue=17&rft.spage=6065&rft.isbn=&rft.btitle=&rft.title=Physics+in+Medicine+%26+Biology&rft.issn=00319155&rft_id=info:doi/10.1088%2F0031-9155%2F58%2F17%2F6065 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-09-01 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Magnetic fields; Magnetoencephalography; Data processing; Head; Brain; Rubidium DO - http://dx.doi.org/10.1088/0031-9155/58/17/6065 ER - TY - JOUR T1 - Electromechanical emulation of hydrokinetic generators for renewable energy research AN - 1701031108; PQ0001164054 AB - The pace of research and development efforts to integrate renewable power sources into modern electric utilities continues to increase. These efforts are motivated by a desire for cleaner, cheaper and more diverse sources of energy. As new analyses and controls approaches are developed to manage renewable sources and tie them into the grid, the need for these controls to be tested in hardware becomes paramount. In particular, hydrokinetic power is appealing due to its high energy density and superior forecastability; however, its development has lagged behind that of wind and solar due in part to the difficulty of acquiring hardware results on an integrated system. Thus, as an alternative to constructing an elaborate wave-tank or locating a power lab riverside, this paper presents a method based on electromechanical emulation of the energy source using a commercially available induction motor drive. Using an electromechanical emulator provides an option for universities and other laboratories to expand their research on hydrokinetics in a typical laboratory setting. JF - IEEE Conferences AU - Neely, Jason C AU - Ruehl, Kelley M AU - Jepsen, Richard A AU - Roberts, Jesse D AU - Glover, Steven F AU - White, Forest E AU - Horry, Michael L AD - Sandia National Laboratories, Albuquerque, NM, 87123, USA PY - 2013 SP - 1 EP - 8 PB - Institute of Electrical and Electronics Engineers, Inc. KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Control equipment KW - Research and development KW - Solar power generation KW - Renewable energy KW - Laboratories KW - Hardware KW - Alternative energy sources KW - Electric utilities KW - Energy density UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701031108?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=IEEE+Conferences&rft.atitle=Electromechanical+emulation+of+hydrokinetic+generators+for+renewable+energy+research&rft.au=Neely%2C+Jason+C%3BRuehl%2C+Kelley+M%3BJepsen%2C+Richard+A%3BRoberts%2C+Jesse+D%3BGlover%2C+Steven+F%3BWhite%2C+Forest+E%3BHorry%2C+Michael+L&rft.aulast=Neely&rft.aufirst=Jason&rft.date=2013-09-01&rft.volume=&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=IEEE+Conferences&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2016-02-03 ER - TY - JOUR T1 - pH modification for silica control AN - 1642290726; 19411253 AB - Lowering solution pH slows the polymerization of silica and formation of silica scale. In batch systems, lowering the pH of approximately 200 ppm silica solutions prevents scale formation for over 300 h. Silica scale forms most quickly near pH 8. Solutions with pH 3.6-3.7 can maintain silica levels of 1,000-3,000 ppm for roughly 90 h. Bench-scale membrane testing showed that silica scale formation lag times of approximately 72 h were achievable after lowering the pH to 4.5-4.7, which might allow flushing of silica-laden solutions through, for example, flow reversal, before scale formation occurs during water treatment. JF - Desalination and Water Treatment AU - Brady, Patrick V AU - Altman, Susan J AU - McGrath, Lucas K AU - Krumhansl, James L AU - Anderson, Howard L AD - Sandia National Laboratories, Albuquerque, NM 87185-0750, USA pvbrady@sandia.gov Y1 - 2013/09// PY - 2013 DA - September 2013 SP - 5901 EP - 5908 PB - European Desalination Society, Tosti 28 1-67100 L'Aquila Italy VL - 51 IS - 31-33 SN - 1944-3994, 1944-3994 KW - Solid State and Superconductivity Abstracts (SO); Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Silica KW - Scale formation KW - Nanofiltration KW - Polymerization KW - Membranes KW - Water treatment KW - Lag time KW - Desalination KW - pH KW - Silicon dioxide UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1642290726?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Desalination+and+Water+Treatment&rft.atitle=pH+modification+for+silica+control&rft.au=Brady%2C+Patrick+V%3BAltman%2C+Susan+J%3BMcGrath%2C+Lucas+K%3BKrumhansl%2C+James+L%3BAnderson%2C+Howard+L&rft.aulast=Brady&rft.aufirst=Patrick&rft.date=2013-09-01&rft.volume=51&rft.issue=31-33&rft.spage=5901&rft.isbn=&rft.btitle=&rft.title=Desalination+and+Water+Treatment&rft.issn=19443994&rft_id=info:doi/10.1080%2F19443994.2013.766905 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2016-04-04 DO - http://dx.doi.org/10.1080/19443994.2013.766905 ER - TY - JOUR T1 - Diagnostic potential of the pulsed discharged helium ionization detector (PDHID) for pathogenic Mycobacterial volatile biomarkers AN - 1439231460; 18555095 AB - Pathogenic Mycobacteria cause diseases in animals and humans with significant economic and societal consequences. Current methods for Mycobacterial detection relies upon time- and labor-intensive techniques such as culturing or DNA analysis. Using gas chromatography and mass spectrometry, four volatile compounds (methyl phenylacetate, methyl p-anisate, methyl nicotinate and o-phenyl anisole) were recently proposed as potential biomarkers for Mycobacteria. We demonstrate for the first time the capabilities of a field-deployable, pulsed discharge helium ionization detector (PDHID) for sensing these volatiles. We determined the analytical performance of the PDHID toward these Mycobacterial volatiles. Detector performance was moderately affected over the temperature range of 150 to 350 degree C. The linear dynamic range for all four analytes exceeded three orders of magnitude. The limits of detection (LOD) and quantitation (LOQ) were calculated as 150 and 450 pg respectively, for all compounds, except methyl phenylacetate (LOD and LOQ, 90 and 270 pg, respectively). Control charts revealed that the PDHID detection system was generally stable, and deviations could be traced to common causes and excluded special causes. Grob tests and ionization potential data suggest that the PDHID is capable of detecting Mycobacterial volatiles in a complex milieu such as culture headspace or breath samples from tuberculosis patients. The diagnostic potential of the PDHID is critical to our goal of a handheld, field-deployable 'sniffer' system for biological pathogens and chemical warfare agents. JF - Journal of Breath Research AU - Manginell, R P AU - Pimentel, A S AU - Mowry, C D AU - Mangan, MA AU - Moorman, M W AU - Allen, A AU - Schares, E S AU - Achyuthan, KE AD - Microsystems-Enabled Detection Department, Sandia National Laboratories, PO Box 5800, MS0892, Albuquerque, NM 87185-0892, USA, rpmangi@sandia.gov Y1 - 2013/09// PY - 2013 DA - Sep 2013 SP - 037107 EP - 1-9 VL - 7 IS - 3 SN - 1752-7155, 1752-7155 KW - Microbiology Abstracts B: Bacteriology KW - Temperature effects KW - Data processing KW - Mycobacterium KW - Anisole KW - Chemical warfare agents KW - Pathogens KW - biomarkers KW - Mass spectroscopy KW - Volatiles KW - Gas chromatography KW - Economics KW - Headspace KW - DNA KW - Helium KW - Tuberculosis KW - Ionization KW - Quantitation KW - J 02400:Human Diseases UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1439231460?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Breath+Research&rft.atitle=Diagnostic+potential+of+the+pulsed+discharged+helium+ionization+detector+%28PDHID%29+for+pathogenic+Mycobacterial+volatile+biomarkers&rft.au=Manginell%2C+R+P%3BPimentel%2C+A+S%3BMowry%2C+C+D%3BMangan%2C+MA%3BMoorman%2C+M+W%3BAllen%2C+A%3BSchares%2C+E+S%3BAchyuthan%2C+KE&rft.aulast=Manginell&rft.aufirst=R&rft.date=2013-09-01&rft.volume=7&rft.issue=3&rft.spage=037107&rft.isbn=&rft.btitle=&rft.title=Journal+of+Breath+Research&rft.issn=17527155&rft_id=info:doi/10.1088%2F1752-7155%2F7%2F3%2F037107 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-10-01 N1 - Last updated - 2013-12-16 N1 - SubjectsTermNotLitGenreText - Temperature effects; Data processing; Anisole; Pathogens; Chemical warfare agents; biomarkers; Mass spectroscopy; Gas chromatography; Volatiles; Headspace; Economics; DNA; Helium; Tuberculosis; Quantitation; Ionization; Mycobacterium DO - http://dx.doi.org/10.1088/1752-7155/7/3/037107 ER - TY - JOUR T1 - Blind test of methods for obtaining 2-D near-surface seismic velocity models from first-arrival traveltimes AN - 1438968222; 2013-078132 AB - Seismic refraction methods are used in environmental and engineering studies to image the shallow subsurface. We present a blind test of inversion and tomographic refraction analysis methods using a synthetic first-arrival-time dataset that was made available to the community in 2010. The data are realistic in terms of the near-surface velocity model, shot-receiver geometry and the data's frequency and added noise. Fourteen estimated models were determined by ten participants using eight different inversion algorithms, with the true model unknown to the participants until it was revealed at a session at the 2011 SAGEEP meeting. The estimated models are generally consistent in terms of their large-scale features, demonstrating the robustness of refraction data inversion in general, and the eight inversion algorithms in particular. When compared to the true model, all of the estimated models contain a smooth expression of its two main features: a large offset in the bedrock and the top of a steeply dipping low-velocity fault zone. The estimated models do not contain a subtle low-velocity zone and other fine-scale features, in accord with conventional wisdom. Together, the results support confidence in the reliability and robustness of modern refraction inversion and tomographic methods. JF - Journal of Environmental & Engineering Geophysics AU - Zelt, Colin A AU - Haines, Seth AU - Powers, Michael H AU - Sheehan, Jacob AU - Rohdewald, Siegfried AU - Link, Curtis AU - Hayashi, Koichi AU - Zhao, Don AU - Zhou, Hua-wei AU - Burton, Bethany L AU - Petersen, Uni K AU - Bonal, Nedra D AU - Doll, William E Y1 - 2013/09// PY - 2013 DA - September 2013 SP - 183 EP - 194 PB - Environmental and Engineering Geophysical Society, Englewood, CO VL - 18 IS - 3 SN - 1083-1363, 1083-1363 KW - tomography KW - P-waves KW - body waves KW - geophysical methods KW - elastic waves KW - refraction methods KW - two-dimensional models KW - seismic methods KW - velocity structure KW - blind test method KW - traveltime KW - seismic waves KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1438968222?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Environmental+%26+Engineering+Geophysics&rft.atitle=Blind+test+of+methods+for+obtaining+2-D+near-surface+seismic+velocity+models+from+first-arrival+traveltimes&rft.au=Zelt%2C+Colin+A%3BHaines%2C+Seth%3BPowers%2C+Michael+H%3BSheehan%2C+Jacob%3BRohdewald%2C+Siegfried%3BLink%2C+Curtis%3BHayashi%2C+Koichi%3BZhao%2C+Don%3BZhou%2C+Hua-wei%3BBurton%2C+Bethany+L%3BPetersen%2C+Uni+K%3BBonal%2C+Nedra+D%3BDoll%2C+William+E&rft.aulast=Zelt&rft.aufirst=Colin&rft.date=2013-09-01&rft.volume=18&rft.issue=3&rft.spage=183&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+%26+Engineering+Geophysics&rft.issn=10831363&rft_id=info:doi/10.2113%2FJEEG18.3.183 L2 - http://jeeg.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, copyright, Environmental & Engineering Geophysical Society | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 34 N1 - PubXState - CO N1 - Document feature - illus. N1 - Last updated - 2013-10-03 N1 - SubjectsTermNotLitGenreText - blind test method; body waves; elastic waves; geophysical methods; P-waves; refraction methods; seismic methods; seismic waves; tomography; traveltime; two-dimensional models; velocity structure DO - http://dx.doi.org/10.2113/JEEG18.3.183 ER - TY - JOUR T1 - Nanopore structures, statistically representative elementary volumes, and transport properties of chalk AN - 1542644901; 2014-048255 AB - Dual focused ion beam-scanning electron microscopy (FIB-SEM) is frequently being used to characterize nano-scale pore structures observed in carbonate and shale gas rocks. However, applications are limited to qualitative analysis of nanopore structures. Herein, the concept of statistical representative elementary volumes (SREV) is applied to FIB-SEM data of a Cretaceous chalk sample. Lattice-Boltzmann (LB) simulations with multiple relaxation time and topological analysis show that the size of the SREV for this chalk sample can be established at approximately 10 microns based on anisotropic permeability, tortuosity, and specific surface area. This work confirms that the FIB-SEM technique can be used for the quantitative analysis of nanopore structures and highlights nano-scale basis for strong anisotropy in the presence of fractures. In addition, nanopores and pore throats are not resolved at voxel dimensions less than approximately 80 nm, resulting in significant underestimation of surface area and permeability. Abstract Copyright (2013), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Yoon, Hongkyu AU - Dewers, Thomas A Y1 - 2013/08/28/ PY - 2013 DA - 2013 Aug 28 SP - 4294 EP - 4298 PB - American Geophysical Union, Washington, DC VL - 40 IS - 16 SN - 0094-8276, 0094-8276 KW - fractured materials KW - experimental studies KW - lattice KW - shale gas KW - Cretaceous KW - natural gas KW - fluid flow KW - petroleum KW - crystal structure KW - porosity KW - Mesozoic KW - laboratory studies KW - chalk KW - physical properties KW - sedimentary rocks KW - reservoir properties KW - crystal chemistry KW - carbonate rocks KW - SEM data KW - permeability KW - 06A:Sedimentary petrology KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542644901?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Nanopore+structures%2C+statistically+representative+elementary+volumes%2C+and+transport+properties+of+chalk&rft.au=Yoon%2C+Hongkyu%3BDewers%2C+Thomas+A&rft.aulast=Yoon&rft.aufirst=Hongkyu&rft.date=2013-08-28&rft.volume=40&rft.issue=16&rft.spage=4294&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1002%2Fgrl.50803 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 35 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-07-04 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - carbonate rocks; chalk; Cretaceous; crystal chemistry; crystal structure; experimental studies; fluid flow; fractured materials; laboratory studies; lattice; Mesozoic; natural gas; permeability; petroleum; physical properties; porosity; reservoir properties; sedimentary rocks; SEM data; shale gas DO - http://dx.doi.org/10.1002/grl.50803 ER - TY - JOUR T1 - Fundamental issues in the representation and propagation of uncertain equation of state information in shock hydrodynamics AN - 1448716741; 18610553 AB - Uncertainty quantification (UQ) deals with providing reasonable estimates of the uncertainties associated with an engineering model and propagating them to final engineering quantities of interest. We present a conceptual UQ framework for the case of shock hydrodynamics with Euler's equations where the uncertainties are assumed to lie principally in the equation of state (EOS). In this paper we consider experimental data as providing both data and an estimate of data uncertainty. We propose a specific Bayesian inference approach for characterizing EOS uncertainty in thermodynamic phase space. We show how this approach provides a natural and efficient methodology for transferring data uncertainty to engineering outputs through an EOS representation that understands and deals consistently with parameter correlations as sensed in the data. Historically, complex multiphase EOSs have been built utilizing tables as the delivery mechanism in order to amortize the cost of creation of the tables over many subsequent continuum scale runs. Once UQ enters into the picture, however, the proper operational paradigm for multiphase tables become much less clear. Using a simple single-phase Mie-Grueneisen model we experiment with several approaches and demonstrate how uncertainty can be represented. We also show how the quality of the tabular representation is of key importance. As a first step, we demonstrate a particular tabular approach for the Mie-Grueneisen model which when extended to multiphase tables should have value for designing a UQ-enabled shock hydrodynamic modeling approach that is not only theoretically sound but also robust, useful, and acceptable to the modeling community. We also propose an approach to separate data uncertainty from modeling error in the EOS. JF - Computers & Fluids AU - Robinson, A C AU - Berry, R D AU - Carpenter, J H AU - Debusschere, B AU - Drake, R R AU - Mattsson, A E AU - Rider, W J AD - Computational Shock & Multiphysics Department, Sandia National Laboratories, P.O. Box 5800, MS-1323, Albuquerque, NM 87185-1323, United States, acrobin@sandia.gov Y1 - 2013/08/16/ PY - 2013 DA - 2013 Aug 16 SP - 187 EP - 193 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 83 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Experimental Data KW - Mathematical models KW - Hydrodynamics KW - Thermodynamics KW - Computers KW - Errors KW - Equations of state KW - Model Studies KW - Costs KW - Engineering KW - Sounds KW - Q2 09422:Storage and transport KW - SW 6010:Structures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1448716741?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computers+%26+Fluids&rft.atitle=Fundamental+issues+in+the+representation+and+propagation+of+uncertain+equation+of+state+information+in+shock+hydrodynamics&rft.au=Robinson%2C+A+C%3BBerry%2C+R+D%3BCarpenter%2C+J+H%3BDebusschere%2C+B%3BDrake%2C+R+R%3BMattsson%2C+A+E%3BRider%2C+W+J&rft.aulast=Robinson&rft.aufirst=A&rft.date=2013-08-16&rft.volume=83&rft.issue=&rft.spage=187&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Mathematical models; Thermodynamics; Hydrodynamics; Equations of state; Costs; Experimental Data; Engineering; Computers; Sounds; Errors; Model Studies ER - TY - JOUR T1 - Multi-material pressure relaxation methods for Lagrangian hydrodynamics AN - 1448716023; 18610547 AB - In Arbitrary Lagrangian-Eulerian (ALE) methods for hydrodynamics with several materials, multiple-material Lagrangian cells invariably arise when the flow field is remapped onto a new mesh. One must close the system of equations for multi-material cells; this, in effect, constitutes a model-either explicit or implicit-for the sub-scale dynamics. We discuss several different multi-material closure model algorithms for Lagrangian hydrodynamics under the assumption of a single velocity for 1D, multiple-material cells. Russian researchers at the All-Russian Research Institute of Experimental Physics (VNIIEF) have developed several models, which we describe in some detail; recent work by US researchers was developed independent of the details of these models. This work contains a comparison of these different approaches, which we believe is unique in the literature. We compare these methods on two standard test problems and discuss the results. JF - Computers & Fluids AU - Yanilkin, Y V AU - Goncharov, E A AU - Kolobyanin, VY AU - Sadchikov, V V AU - Kamm, J R AU - Shashkov, MJ AU - Rider, W J AD - Sandia National Laboratories, Albuquerque, NM 87185, USA, jrkamm@sandia.gov Y1 - 2013/08/16/ PY - 2013 DA - 2013 Aug 16 SP - 137 EP - 143 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 83 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Testing Procedures KW - Mathematical models KW - Hydrodynamics KW - Computers KW - Algorithms KW - Velocity KW - Relaxation Method KW - Model Studies KW - Methodology KW - Standards KW - Pressure KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1448716023?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computers+%26+Fluids&rft.atitle=Multi-material+pressure+relaxation+methods+for+Lagrangian+hydrodynamics&rft.au=Yanilkin%2C+Y+V%3BGoncharov%2C+E+A%3BKolobyanin%2C+VY%3BSadchikov%2C+V+V%3BKamm%2C+J+R%3BShashkov%2C+MJ%3BRider%2C+W+J&rft.aulast=Yanilkin&rft.aufirst=Y&rft.date=2013-08-16&rft.volume=83&rft.issue=&rft.spage=137&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Mathematical models; Hydrodynamics; Pressure; Methodology; Testing Procedures; Computers; Algorithms; Relaxation Method; Velocity; Standards; Model Studies ER - TY - JOUR T1 - A high resolution Lagrangian method using nonlinear hybridization and hyperviscosity AN - 1448708829; 18610537 AB - Classical artificial viscosity methods often suffer from excessive numerical viscosity both at and away from shocks. While a proper amount of dissipation is necessary at the shock wave, it should be minimized away from the shock and disappear where the flow is smooth. The common approach to remove the excessive dissipation is to introduce a limiter. We use a limiting methodology based on nonlinear hybridization, which generalizes to multiple dimensions naturally. Moreover, the properties of the limiter are made mesh independent through abiding by important symmetry and invariance characteristics. A secondary impact of the approach is the use of more optimal coefficients for the viscosity itself. The coefficients can be derived directly through analysis of the Rankine-Hugoniot relations. We can further refine our approach with the use of hyperviscous dissipation that helps to more effectively control oscillations. The hyperviscosity is defined by applying a filter to the original unlimited viscosity, which is then combined using the original limiter. The combination of the limiter with the hyperviscosity produces sharp shock transitions while effectively reducing the amount of high frequency noise emitted by the shock. These characteristics are demonstrated computationally and we show that the limiter returns the overall method to second-order accuracy with or without the contribution of the hyperviscosity. JF - Computers & Fluids AU - Rider, W J AU - Love, E AU - Scovazzi, G AU - Weirs, V G AD - Computational Shock & Multi-Physics Department, Sandia National Laboratories, MS-1323, P.O. Box 5800, Albuquerque, NM 87185-0378, United States, wjrider@sandia.gov Y1 - 2013/08/16/ PY - 2013 DA - 2013 Aug 16 SP - 25 EP - 32 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 83 SN - 0045-7930, 0045-7930 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Filters KW - Viscosity KW - Computers KW - Wave dissipation KW - Noise KW - Waves KW - Hybridization KW - SW 0810:General KW - Q2 09182:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1448708829?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computers+%26+Fluids&rft.atitle=A+high+resolution+Lagrangian+method+using+nonlinear+hybridization+and+hyperviscosity&rft.au=Rider%2C+W+J%3BLove%2C+E%3BScovazzi%2C+G%3BWeirs%2C+V+G&rft.aulast=Rider&rft.aufirst=W&rft.date=2013-08-16&rft.volume=83&rft.issue=&rft.spage=25&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Fluids&rft.issn=00457930&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-09-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Wave dissipation; Hybridization; Filters; Viscosity; Computers; Noise; Waves ER - TY - JOUR T1 - A polyoxometalate flow battery AN - 1448762282; 18680369 AB - A redox flow battery utilizing two, three-electron polyoxometalate redox couples (SiV super(V) sub(3)W super(V) sub(9) super(I)O super(7) sub(4) super(-) sub(0)/SiV super(I) sub(3) super(V)W super(V) sub(9) super(I)O super(1) sub(4) super(0) sub(0) super(-) and SiV super(I) sub(3) super(V)W super(V) sub(9) super(I)O super(1) sub(4) super(0) sub(0) super(-) /SiV super(I) sub(3) super(V)W super(V) sub(6) super(I)O super(1) sub(4) super(3) sub(0) super(-)) was investigated for use in stationary storage in either aqueous or non-aqueous conditions. The aqueous battery had coulombic efficiencies greater than 95% with relatively low capacity fading over 100 cycles. Infrared studies showed there was no decomposition of the compound under these conditions. The non-aqueous analog had a higher operating voltage but at the expense of coulombic efficiency. The spontaneous formation of these clusters by self-assembly facilitates recovery of the battery after being subjected to reversed polarity. Polyoxometalates offer a new approach to stationary storage materials because they are capable of undergoing multi-electron reactions and are stable over a wide range of pH values and temperatures. JF - Journal of Power Sources AU - Pratt, HD III AU - Hudak, N S AU - Fang, X AU - Anderson, T M AD - Sandia National Laboratories, Albuquerque, NM 87185, USA, tmander@sandia.gov Y1 - 2013/08/15/ PY - 2013 DA - 2013 Aug 15 SP - 259 EP - 264 PB - Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 236 SN - 0378-7753, 0378-7753 KW - Environment Abstracts KW - Storage KW - Batteries KW - Temperature KW - Decomposition KW - pH KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1448762282?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Power+Sources&rft.atitle=A+polyoxometalate+flow+battery&rft.au=Pratt%2C+HD+III%3BHudak%2C+N+S%3BFang%2C+X%3BAnderson%2C+T+M&rft.aulast=Pratt&rft.aufirst=HD&rft.date=2013-08-15&rft.volume=236&rft.issue=&rft.spage=259&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Storage; Batteries; Temperature; Decomposition; pH ER - TY - JOUR T1 - Suitability Assessment of Non-Potable Water to Meet the Electricity Generation Demands in 2030 AN - 1505335659; 19283954 AB - Large amounts of water are required for electricity generation, and demand for thermoelectric power is predicted to increase significantly over the next several decades. Of concern, is that nearly half of this new demand is in regions currently subject to fresh water shortages due to over-appropriation, drought, and climatic drivers. This study explores the suitability of using non-traditional sources of water, namely wastewater and brackish ground water for future thermoelectric cooling in 22 continental Electricity Market Module Regions. Both sources pose unique financial, technical, and management challenges, but are widely available and in the majority of instances economically feasible. While neither resource can meet all future demand by thermoelectric generation, when added to the existing water supply and management portfolio, they provide significant augmentation to existing traditional water supplies. JF - Journal of Contemporary Water Research & Education AU - Zemlick, Katie AU - Tidwell, Vincent C AU - Roberts, Barry L AU - Castillo, Cesar R AD - Sandia National Laboratories, Albuquerque, NM. Y1 - 2013/08// PY - 2013 DA - Aug 2013 SP - 95 EP - 105 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 151 IS - 1 SN - 1936-7031, 1936-7031 KW - ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts; Environment Abstracts KW - Non-potable water KW - thermoelectric KW - electricity KW - municipal wastewater KW - brackish ground water KW - Resource management KW - Water Supply KW - Drought KW - Electricity KW - Water supplies KW - Assessments KW - Portfolios KW - Droughts KW - Financial management KW - Climate KW - Cooling KW - Water supply KW - Education KW - Water management KW - Water Shortage KW - Groundwater KW - Wastewater KW - Q5 08503:Characteristics, behavior and fate KW - SW 3040:Wastewater treatment processes KW - AQ 00008:Effects of Pollution KW - Q2 09406:Energy from the sea KW - ENA 04:Environmental Education UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1505335659?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Contemporary+Water+Research+%26+Education&rft.atitle=Suitability+Assessment+of+Non-Potable+Water+to+Meet+the+Electricity+Generation+Demands+in+2030&rft.au=Zemlick%2C+Katie%3BTidwell%2C+Vincent+C%3BRoberts%2C+Barry+L%3BCastillo%2C+Cesar+R&rft.aulast=Zemlick&rft.aufirst=Katie&rft.date=2013-08-01&rft.volume=151&rft.issue=1&rft.spage=95&rft.isbn=&rft.btitle=&rft.title=Journal+of+Contemporary+Water+Research+%26+Education&rft.issn=19367031&rft_id=info:doi/10.1111%2Fj.1936-704X.2013.03155.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-03-01 N1 - Last updated - 2015-01-21 N1 - SubjectsTermNotLitGenreText - Education; Resource management; Water management; Climate; Financial management; Electricity; Droughts; Water supply; Portfolios; Groundwater; Water supplies; Wastewater; Assessments; Water Shortage; Water Supply; Drought; Cooling DO - http://dx.doi.org/10.1111/j.1936-704X.2013.03155.x ER - TY - JOUR T1 - Molecular dynamics studies of material property effects on thermal boundary conductance. AN - 1367507743; 23715116 AB - Thermal boundary resistance (inverse of conductance) between different material layers can dominate the overall thermal resistance in nanostructures and therefore impact the performance of the thermal property limiting nano devices. Because relationships between material properties and thermal boundary conductance have not been fully understood, optimum devices cannot be developed through a rational selection of materials. Here we develop generic interatomic potentials to enable material properties to be continuously varied in extremely large molecular dynamics simulations to explore the dependence of thermal boundary conductance on the characteristic properties of materials such as atomic mass, stiffness, and interfacial crystallography. To ensure that our study is not biased to a particular model, we employ different types of interatomic potentials. In particular, both a Stillinger-Weber potential and a hybrid embedded-atom-method + Stillinger-Weber potential are used to study metal-on-semiconductor compound interfaces, and the results are analyzed considering previous work based upon a Lennard-Jones (LJ) potential. These studies, therefore, reliably provide new understanding of interfacial transport phenomena particularly in terms of effects of material properties on thermal boundary conductance. Our most important finding is that thermal boundary conductance increases with the overlap of the vibrational spectra between metal modes and the acoustic modes of the semiconductor compound, and increasing the metal stiffness causes a continuous shift of the metal modes. As a result, the maximum thermal boundary conductance occurs at an intermediate metal stiffness (best matched to the semiconductor stiffness) that maximizes the overlap of the vibrational modes. JF - Physical chemistry chemical physics : PCCP AU - Zhou, X W AU - Jones, R E AU - Duda, J C AU - Hopkins, P E AD - Mechanics of Materials Department, Sandia National Laboratories, Livermore, California 94550, USA. xzhou@sandia.gov Y1 - 2013/07/14/ PY - 2013 DA - 2013 Jul 14 SP - 11078 EP - 11087 VL - 15 IS - 26 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1367507743?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Physical+chemistry+chemical+physics+%3A+PCCP&rft.atitle=Molecular+dynamics+studies+of+material+property+effects+on+thermal+boundary+conductance.&rft.au=Zhou%2C+X+W%3BJones%2C+R+E%3BDuda%2C+J+C%3BHopkins%2C+P+E&rft.aulast=Zhou&rft.aufirst=X&rft.date=2013-07-14&rft.volume=15&rft.issue=26&rft.spage=11078&rft.isbn=&rft.btitle=&rft.title=Physical+chemistry+chemical+physics+%3A+PCCP&rft.issn=1463-9084&rft_id=info:doi/10.1039%2Fc3cp51131f LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2014-01-16 N1 - Date created - 2013-06-12 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1039/c3cp51131f ER - TY - JOUR T1 - Chemical explosion experiments to improve nuclear test monitoring AN - 1510394369; 2014-019363 AB - A series of chemical explosions, called the Source Physics Experiments (SPE, see Table), is being conducted under the auspices of the U.S. Department of Energy's National Nuclear Security Administration (NNSA) to develop a new, more physics-based paradigm for nuclear test monitoring. Improvements in technical capabilities resulting from such development have the potential to help the United States keep better tabs on underground nuclear tests being conducted worldwide and to enhance treaty monitoring. Abstract Copyright This paper is not subject to U.S. copyright. Published in 2013 by the American Geophysical Union. JF - Eos, Transactions, American Geophysical Union AU - Snelson, Catherine M AU - Abbott, Robert E AU - Broome, Scott T AU - Mellors, Robert J AU - Patton, Howard J AU - Sussman, Aviva J AU - Townsend, Margaret J AU - Walter, William R Y1 - 2013/07/02/ PY - 2013 DA - 2013 Jul 02 SP - 237 EP - 239 PB - American Geophysical Union, Washington, DC VL - 94 IS - 27 SN - 0096-3941, 0096-3941 KW - bedrock KW - body waves KW - monitoring KW - numerical models KW - explosions KW - igneous rocks KW - granites KW - data processing KW - prediction KW - elastic waves KW - seismic sources KW - plutonic rocks KW - digital simulation KW - propagation KW - seismic waves KW - seismic networks KW - nuclear explosions KW - S-waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510394369?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Eos%2C+Transactions%2C+American+Geophysical+Union&rft.atitle=Chemical+explosion+experiments+to+improve+nuclear+test+monitoring&rft.au=Snelson%2C+Catherine+M%3BAbbott%2C+Robert+E%3BBroome%2C+Scott+T%3BMellors%2C+Robert+J%3BPatton%2C+Howard+J%3BSussman%2C+Aviva+J%3BTownsend%2C+Margaret+J%3BWalter%2C+William+R&rft.aulast=Snelson&rft.aufirst=Catherine&rft.date=2013-07-02&rft.volume=94&rft.issue=27&rft.spage=237&rft.isbn=&rft.btitle=&rft.title=Eos%2C+Transactions%2C+American+Geophysical+Union&rft.issn=00963941&rft_id=info:doi/10.1002%2F2013EO270002 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292324-9250 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 5 N1 - PubXState - DC N1 - Document feature - 1 table N1 - Last updated - 2014-03-27 N1 - CODEN - EOSTAJ N1 - SubjectsTermNotLitGenreText - bedrock; body waves; data processing; digital simulation; elastic waves; explosions; granites; igneous rocks; monitoring; nuclear explosions; numerical models; plutonic rocks; prediction; propagation; S-waves; seismic networks; seismic sources; seismic waves DO - http://dx.doi.org/10.1002/2013EO270002 ER - TY - JOUR T1 - Bridging the gap between HRA research and HRA practice: A Bayesian network version of SPAR-H AN - 1458538429; 18726561 AB - The shortcomings of Human Reliability Analysis (HRA) have been a topic of discussion for over two decades. Repeated attempts to address these limitations have resulted in over 50 HRA methods, and the HRA research community continues to develop new methods. However, there remains a gap between the methods developed by HRA researchers and those actually used by HRA practitioners. Bayesian Networks (BNs) have become an increasingly popular part of the risk and reliability analysis framework over the past decade. BNs provide a framework for addressing many of the shortcomings of HRA from a researcher perspective and from a practitioner perspective. Several research groups have developed advanced HRA methods based on BNs, but none of these methods has been adopted by HRA practitioners in the U.S. nuclear power industry or at the U.S. Nuclear Regulatory Commission. In this paper we bridge the gap between HRA research and HRA practice by building a BN version of the widely used SPAR-H method. We demonstrate how the SPAR-H BN can be used by HRA practitioners, and we also demonstrate how it can be modified to incorporate data and information from research to advance HRA practice. The SPAR-H BN can be used as a starting point for translating HRA research efforts and advances in scientific understanding into real, timely benefits for HRA practitioners. JF - Reliability Engineering & System Safety AU - Groth, K M AU - Swiler, L P AD - Sandia National Laboratories, Albuquerque, NM 87185-0748, USA, kgroth@sandia.gov Y1 - 2013/07// PY - 2013 DA - Jul 2013 SP - 33 EP - 42 PB - Elsevier B.V., The Boulevard Langford Lane Kidlington Oxford OX5 1GB United Kingdom VL - 115 SN - 0951-8320, 0951-8320 KW - Health & Safety Science Abstracts KW - USA KW - Safety engineering KW - Commissions KW - H 6000:Natural Disasters/Civil Defense/Emergency Management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1458538429?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Bridging+the+gap+between+HRA+research+and+HRA+practice%3A+A+Bayesian+network+version+of+SPAR-H&rft.au=Groth%2C+K+M%3BSwiler%2C+L+P&rft.aulast=Groth&rft.aufirst=K&rft.date=2013-07-01&rft.volume=115&rft.issue=&rft.spage=33&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Safety engineering; Commissions; USA ER - TY - JOUR T1 - Sr- and Mn-doped LaAlO sub(3- delta ) for solar thermochemical H sub(2) and CO production AN - 1419368871; 18277599 AB - The increasing global appetite for energy within the transportation sector will inevitably result in the combustion of more fossil fuel. A renewable-derived approach to carbon-neutral synthetic fuels is therefore needed to offset the negative impacts of this trend, which include climate change. In this communication we report the use of nonstoichiometric perovskite oxides in two-step, solar-thermochemical water or carbon dioxide splitting cycles. We find that LaAlO sub(3) doped with Mn and Sr will efficiently split both gases. Moreover the H sub(2) yields are 9 greater, and the CO yields 6 greater, than those produced by the current state-of-the-art material, ceria, when reduced at 1350 degree C and re-oxidized at 1000 degree C. The temperature at which O sub(2) begins to evolve from the perovskite is fully 300 degree C below that of ceria. The materials are also very robust, maintaining their redox activity over at least 80 CO sub(2) splitting cycles. This discovery has profound implications for the development of concentrated solar fuel technologies. JF - Energy & Environmental Science AU - McDaniel, Anthony H AU - Miller, Elizabeth C AU - Arifin, Darwin AU - Ambrosini, Andrea AU - Coker, Eric N AU - O'Hayre, Ryan AU - Chueh, William C AU - Tong, Jianhua AD - Sandia National Laboratories; Livermore; California 94551; USA; +1 925 294 1440; , amcdani@sandia.gov Y1 - 2013/07// PY - 2013 DA - July 2013 SP - 2424 EP - 2428 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 6 IS - 8 SN - 1754-5692, 1754-5692 KW - Sustainability Science Abstracts; Environment Abstracts KW - Fuel technology KW - Transportation KW - Gases KW - Fossil fuels KW - Fuels KW - Climate change KW - Temperature KW - Carbon dioxide KW - Combustion KW - M3 1010:Issues in Sustainable Development KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1419368871?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+%26+Environmental+Science&rft.atitle=Sr-+and+Mn-doped+LaAlO+sub%283-+delta+%29+for+solar+thermochemical+H+sub%282%29+and+CO+production&rft.au=McDaniel%2C+Anthony+H%3BMiller%2C+Elizabeth+C%3BArifin%2C+Darwin%3BAmbrosini%2C+Andrea%3BCoker%2C+Eric+N%3BO%27Hayre%2C+Ryan%3BChueh%2C+William+C%3BTong%2C+Jianhua&rft.aulast=McDaniel&rft.aufirst=Anthony&rft.date=2013-07-01&rft.volume=6&rft.issue=8&rft.spage=2424&rft.isbn=&rft.btitle=&rft.title=Energy+%26+Environmental+Science&rft.issn=17545692&rft_id=info:doi/10.1039%2Fc3ee41372a LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-08-01 N1 - Number of references - 26 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Fuel technology; Gases; Transportation; Fossil fuels; Fuels; Climate change; Temperature; Carbon dioxide; Combustion DO - http://dx.doi.org/10.1039/c3ee41372a ER - TY - JOUR T1 - Ion-Aerosol Flux Coefficients and the Steady-State Charge Distribution of Aerosols in a Bipolar Ion Environment AN - 1770354989; 17909637 AB - Fuchs' theory, as corrected by Hoppel and Frick, is widely used to compute flux coefficients of ions to aerosol particles and the resultant charge distribution. We have identified approximations made in previous works that limit the theory's accuracy. Hoppel and Frick used two characteristic speeds or kinetic energies to calculate the flux coefficients of ions to aerosol particles in lieu of an average of the flux coefficients over the Maxwell-Boltzmann distribution of ion speeds. In the present work, we show that this approximation artificially reduces the number of multiply charged particles. Ion capture may be enhanced by three-body trapping, a process wherein an ion has a collision with a neutral gas molecule and loses sufficient kinetic energy to be captured by the particle. The gas kinetic theory approach to three-body trapping has been refined to better account for the collision between the ion and a neutral gas molecule within the potential presented by the particle. Approximations to the calculation of energy losses and the probability of ion capture have been relaxed. The possibility that an image charge may be induced on the ion as well as on the particle is allowed. While the previous work was limited to electrically conductive particles, both the ion and the particle are allowed to have any dielectric constant in the present work, and the finite size of the ions is taken into account when calculating minimum capture radii for the ion-particle interactions. The resulting ion flux coefficients differ from previous results both in the low nanometer regime and in the continuum regime. We explore the influence of key parameters on the charge distribution, including dielectric constant, temperature, and pressure, to understand how operating conditions may affect the interpretation of differential mobility analyzer measurements of particle size distributions. Finally, an empirical expression for the new charge distribution is given to facilitate rapid calculations. Copyright 2013 American Association for Aerosol Research JF - Aerosol Science & Technology AU - Lopez-Yglesias, Xerxes AU - Flagan, Richard C AD - Sandia National Laboratories, Livermore, California, USA Y1 - 2013/06/01/ PY - 2013 DA - 2013 Jun 01 SP - 688 EP - 704 PB - Taylor & Francis Group Ltd., 2 Park Square Oxford OX14 4RN United Kingdom VL - 47 IS - 6 SN - 0278-6826, 0278-6826 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN) KW - Charge distribution KW - Aerosols KW - Kinetic energy KW - Flux KW - Collision dynamics KW - Approximation KW - Trapping KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1770354989?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Aerosol+Science+%26+Technology&rft.atitle=Ion-Aerosol+Flux+Coefficients+and+the+Steady-State+Charge+Distribution+of+Aerosols+in+a+Bipolar+Ion+Environment&rft.au=Lopez-Yglesias%2C+Xerxes%3BFlagan%2C+Richard+C&rft.aulast=Lopez-Yglesias&rft.aufirst=Xerxes&rft.date=2013-06-01&rft.volume=47&rft.issue=6&rft.spage=688&rft.isbn=&rft.btitle=&rft.title=Aerosol+Science+%26+Technology&rft.issn=02786826&rft_id=info:doi/10.1080%2F02786826.2013.783684 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-01 N1 - Last updated - 2016-03-04 DO - http://dx.doi.org/10.1080/02786826.2013.783684 ER - TY - JOUR T1 - Performance impact of solar gain on photovoltaic inverters and utility-scale energy generation systems AN - 1770324606; PQ0001164865 AB - Accurate performance and reliability evaluation of utility-scale photovoltaic (PV) systems requires accountability of solar gain contributions. A novel solar gain utility-scale inverter model has been developed to characterize inverter efficiency with respect to solar resource, general ambient conditions and thermal system losses. A sensitivity analysis was performed to evaluate the robustness of the model based on four assumed material properties. This analysis revealed 22.9% modeled internal inverter temperature sensitivity to surface absorptivity, with significantly less sensitivity to other parameters studied, indicating the impact of proper surface coating material selection on solar thermal absorption. This analysis was applied to a large utility-scale PV plant, assessing performance data from twelve 500kW inverters, and environmental data from twelve respective meteorological test stations. An RMSE value of 6.1% was found between the model and measured inner inverter temperatures. The results also suggest a negative 3.610 super(-4) [W/m super(2)] super(-1) normalized inverter efficiency correspondence with solar gain heat adsorption across the twelve inverters for a one-day, clear-sky time period. JF - IEEE Conferences AU - Armijo, Kenneth M AD - Sandia National Laboratories, Albuquerque, NM 87185 USA Y1 - 2013/06// PY - 2013 DA - June 2013 SP - 0740 EP - 0745 PB - Institute of Electrical and Electronics Engineers, Inc. KW - Solid State and Superconductivity Abstracts (SO); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA) KW - Solar heating KW - Inverters KW - Sensitivity analysis KW - Gain KW - Solar cells KW - Photovoltaic cells KW - Materials selection KW - Surface chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1770324606?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=IEEE+Conferences&rft.atitle=Performance+impact+of+solar+gain+on+photovoltaic+inverters+and+utility-scale+energy+generation+systems&rft.au=Armijo%2C+Kenneth+M&rft.aulast=Armijo&rft.aufirst=Kenneth&rft.date=2013-06-01&rft.volume=&rft.issue=&rft.spage=0740&rft.isbn=&rft.btitle=&rft.title=IEEE+Conferences&rft.issn=&rft_id=info:doi/10.1109%2FPVSC.2013.6744256 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-03-04 DO - http://dx.doi.org/10.1109/PVSC.2013.6744256 ER - TY - JOUR T1 - A Study of Initial Hydrogen Uptake in Zr-Based Cladding Alloys AN - 1671535667; 18278173 AB - Due to its low neutron cross section and high corrosion resistance, Zr-based alloys are currently used as cladding for the nuclear fuel in light water reactors. During service, the Zr-based cladding experiences hydrogen uptake due to corrosion at the cladding/water interface; any hydrogen in excess of hydrogen solubility in Zr-alloys precipitates out as hydrides. In the absence of an applied stress, hydride precipitation is governed by the texture of Zr-matrix and tends to be oriented circumferentially within the cladding. Circumferential hydrides, although brittle relative to the matrix, as such do not adversely influence axial or hoop tensile properties of claddings. However, when used fuel is removed from wet storage to be dried for long term storage, it experiences a considerably increase in temperature as a result of the drying process itself. Currently, the NRC limits the maximum temperature that the cladding is permitted to attain to 400 degree C during normal storage conditions, including the drying process. As the temperature increases, the solubility of hydrogen in the Zr matrix increases, and a portion of circumferential hydrides dissolves into the Zr-matrix. Once the drying process is complete, and during its storage in the dry state, the cladding temperature gradually decreases, thereby reducing the solubility of hydrogen in the Zr matrix and eventually resulting in re-precipitation of hydrides. Since the cladding is under a hoop stress during cooling, the new hydrides tend to be oriented radially within the cladding. Due to their brittle nature, and because these radial hydrides experience a stress perpendicular to the hydride/matrix interface, a significant decrease in the hoop tensile properties of the cladding may result. This represents a significant concern during dry storage and particularly when subsequent transport of used nuclear fuel cladding rods is considered. JF - Transactions of the American Nuclear Society AU - Rajasekhara, Shreyas AU - Enos David, G AU - Doyle Barney, L AU - Clark Blythe, G AD - Sandia National Laboratories, PO Box 5800/MS 1423, Albuquerque, NM-87185 Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 335 EP - 338 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); METADEX (MD); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); Corrosion Abstracts (CO); CSA / ASCE Civil Engineering Abstracts (CE) KW - Zirconium base alloys KW - Hydrogen storage KW - Cladding KW - Hydrides KW - Drying KW - Zirconium KW - Hydrogen embrittlement KW - Texture UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671535667?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=A+Study+of+Initial+Hydrogen+Uptake+in+Zr-Based+Cladding+Alloys&rft.au=Rajasekhara%2C+Shreyas%3BEnos+David%2C+G%3BDoyle+Barney%2C+L%3BClark+Blythe%2C+G&rft.aulast=Rajasekhara&rft.aufirst=Shreyas&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=335&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 26 N1 - Last updated - 2015-04-09 ER - TY - JOUR T1 - Using environmental tracers and numerical simulation to investigate regional hydrothermal basins-Norris Geyser Basin area, Yellowstone National Park, USA AN - 1639993935; 21012248 AB - Heat and fluid flow fields are simulated for several conceptual permeability fields and compared to processes inferred from environmental tracers in springs around Norris Geyser Basin, Yellowstone National Park. Large hydrothermal basins require specific permeability distributions in the upper crust. High permeability connections must exist between the land surface and high-temperature environments at depths of up to 5 km. The highest modeled temperatures are produced with a vertical conduit permeability of 10 super(-15)m super(2). Permeability at depths of 3-5 km must be within one order of magnitude of the near-surface permeability and must be greater than or equal to 10 super(-16)m super(2). Environmental tracers from springs are used to develop a plausible numerical model of the local to regional groundwater flow field for the Norris Geyser Basin area. The model simulations provide insight into the dynamics of heat and fluid flow in a large regional hydrothermal system. Key Points * Numerical simulation of regional hydrothermal basins * Reproduces processes inferred from geochemical signals * Integrated local to regional groundwater and heat flow in high heat flow area JF - Journal of Geophysical Research: Solid Earth AU - Gardner, WPayton AU - Susong, David D AU - Solomon, DKip AU - Heasler, Henry P AD - Sandia National Laboratories, Albuquerque, New Mexico, USA. Y1 - 2013/06// PY - 2013 DA - June 2013 SP - 2777 EP - 2787 PB - Blackwell Publishing Ltd., 9600 Garsington Road Oxford OX4 2DQ United States VL - 118 IS - 6 SN - 2169-9313, 2169-9313 KW - Water Resources Abstracts; Aqualine Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Fluid Flow KW - Geysers KW - Hot springs KW - Groundwater Basins KW - Environmental Tracers KW - Permeability KW - Numerical analysis KW - Tracers KW - Mathematical models KW - Heat flow KW - Model Studies KW - USA KW - Heat KW - Groundwater KW - Fluid flow KW - Hydrothermal fields KW - Q2 09266:Tectonics and crustal structure KW - AQ 00006:Sewage KW - SW 6010:Structures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1639993935?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.atitle=Using+environmental+tracers+and+numerical+simulation+to+investigate+regional+hydrothermal+basins-Norris+Geyser+Basin+area%2C+Yellowstone+National+Park%2C+USA&rft.au=Gardner%2C+WPayton%3BSusong%2C+David+D%3BSolomon%2C+DKip%3BHeasler%2C+Henry+P&rft.aulast=Gardner&rft.aufirst=WPayton&rft.date=2013-06-01&rft.volume=118&rft.issue=6&rft.spage=2777&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Solid+Earth&rft.issn=21699313&rft_id=info:doi/10.1002%2Fjgrb.50210 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-12-01 N1 - Last updated - 2016-10-26 N1 - SubjectsTermNotLitGenreText - Tracers; Numerical analysis; Permeability; Mathematical models; Heat flow; Hot springs; Fluid flow; Hydrothermal fields; Fluid Flow; Heat; Geysers; Groundwater Basins; Groundwater; Model Studies; Environmental Tracers; USA DO - http://dx.doi.org/10.1002/jgrb.50210 ER - TY - JOUR T1 - Core-scale solute transport model selection using Monte Carlo analysis AN - 1566845416; 20688815 AB - Model applicability to core-scale solute transport is evaluated using breakthrough data from column experiments conducted with conservative tracers tritium [Formulaomitted] and sodium-22 [Formulaomitted], and the retarding solute uranium-232 [Formulaomitted]. The three models considered are single-porosity, double-porosity with single-rate mobile-immobile mass-exchange, and the multirate model, which is a deterministic model that admits the statistics of a random mobile-immobile mass-exchange rate coefficient. The experiments were conducted on intact Culebra Dolomite core samples. Previously, data were analyzed using single-porosity and double-porosity models although the Culebra Dolomite is known to possess multiple types and scales of porosity, and to exhibit multirate mobile-immobile-domain mass transfer characteristics at field scale. The data are reanalyzed here and null-space Monte Carlo analysis is used to facilitate objective model selection. Prediction (or residual) bias is adopted as a measure of the model structural error. The analysis clearly shows single-porosity and double-porosity models are structurally deficient, yielding late-time residual bias that grows with time. On the other hand, the multirate model yields unbiased predictions consistent with the late-time [Formulaomitted] slope diagnostic of multirate mass transfer. The analysis indicates the multirate model is better suited to describing core-scale solute breakthrough in the Culebra Dolomite than the other two models. Key Points * Analyze applicability of three distinct models to core-scale transport * Parameter estimation and fit of the three models to data * Model selection using predictive uncertainty analysis JF - Water Resources Research AU - Malama, Bwalya AU - Kuhlman, Kristopher L AU - James, Scott C AD - Performance Assessment Department, Sandia National Laboratories, 4100 National Parks Highway, Carlsbad, New Mexico, USA. Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 3133 EP - 3147 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 49 IS - 6 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Water Resources Abstracts; Aqualine Abstracts KW - multirate mass transfer KW - model selection KW - model structural error KW - predictive analysis KW - solute transport KW - Prediction KW - Statistics KW - Statistical analysis KW - Water resources KW - Monte Carlo method KW - Solutes KW - Greater Antilles, Puerto Rico, Culebra KW - Slopes KW - Mathematical models KW - Porosity KW - Mass Transfer KW - Model Studies KW - Solute Transport KW - Tritium KW - Dolomite KW - Mass transfer KW - Water resources research KW - SW 0810:General KW - M2 556.18:Water Management (556.18) KW - Q5 08502:Methods and instruments KW - AQ 00003:Monitoring and Analysis of Water and Wastes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566845416?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Core-scale+solute+transport+model+selection+using+Monte+Carlo+analysis&rft.au=Malama%2C+Bwalya%3BKuhlman%2C+Kristopher+L%3BJames%2C+Scott+C&rft.aulast=Malama&rft.aufirst=Bwalya&rft.date=2013-06-01&rft.volume=49&rft.issue=6&rft.spage=3133&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2Fwrcr.20273 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2014-12-11 N1 - SubjectsTermNotLitGenreText - Prediction; Solutes; Mathematical models; Tritium; Porosity; Dolomite; Statistical analysis; Water resources; Mass transfer; Monte Carlo method; Water resources research; Statistics; Solute Transport; Mass Transfer; Slopes; Model Studies; Greater Antilles, Puerto Rico, Culebra DO - http://dx.doi.org/10.1002/wrcr.20273 ER - TY - JOUR T1 - Footprint diameter for a cosmic-ray soil moisture probe: Theory and Monte Carlo simulations AN - 1566840586; 20688803 AB - We used a combination of diffusion theory and neutron transport simulations to estimate the lateral footprint for a cosmic-ray soil moisture probe. The footprint is radial and can be described by an exponential function. Our theory assumes, and our simulations confirm that the corresponding exponential folding length is closely related to the moderation length in air, which in this work is defined as the average net displacement experienced by neutrons while traveling from the point of emission from soil to the point of detection in air. These simulations indicate that the effective moderation length is 150 m in dry air at sea level, and that this value is fairly constant over a wide range of detection energies--from 10 super(0) to 10 super(5) eV. If we define the lateral footprint as the area encompassing two e-fold distances, i.e., the area from which 86% of the recorded neutrons originate, then the footprint diameter is nearly 600 m in dry air. Both theory and simulations indicate that the footprint is inversely proportional to air density and linearly proportional to the height of the sensor above the ground for heights up to 125 m. Furthermore, our simulations indicate that the dependence on soil moisture is small, but the dependence on atmospheric humidity is significant, with a decrease in the footprint diameter of 40 m for every 0.01 kg kg super(-1) increase in specific humidity. The good agreement between our theory and transport simulations suggests that the lateral footprint is determined mainly by the properties of air. Key Points * Footprint diameter for a cosmic-ray soil moisture probe. * Theory and transport simulations. * Environmental factors influencing the footprint. JF - Water Resources Research AU - Desilets, Darin AU - Zreda, Marek AD - Department of Geophysics and Atmospheric Sciences, Sandia National Laboratories, Albuquerque, New Mexico, USA. Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 3566 EP - 3575 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 49 IS - 6 SN - 0043-1397, 0043-1397 KW - Meteorological & Geoastrophysical Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Water Resources Abstracts; Aqualine Abstracts KW - cosmic-ray probe KW - soil moisture KW - COSMOS KW - footprint KW - neutron KW - MCNP KW - Specific humidity KW - Sea level KW - Sensors KW - Probes KW - Statistical analysis KW - Water resources KW - Monte Carlo method KW - Soil Water KW - Diffusion theories KW - Environmental factors KW - Sea Level KW - Dry air KW - Statistical Analysis KW - Specific Humidity KW - Marine KW - Density KW - Humidity KW - Numerical simulations KW - Moisture Content KW - Soil moisture KW - Water resources research KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - Q5 08503:Characteristics, behavior and fate KW - M2 556.14:Infiltration/Soil Moisture (556.14) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566840586?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Footprint+diameter+for+a+cosmic-ray+soil+moisture+probe%3A+Theory+and+Monte+Carlo+simulations&rft.au=Desilets%2C+Darin%3BZreda%2C+Marek&rft.aulast=Desilets&rft.aufirst=Darin&rft.date=2013-06-01&rft.volume=49&rft.issue=6&rft.spage=3566&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2Fwrcr.20187 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2014-12-11 N1 - SubjectsTermNotLitGenreText - Specific humidity; Sea level; Sensors; Statistical analysis; Water resources; Humidity; Environmental factors; Numerical simulations; Dry air; Monte Carlo method; Diffusion theories; Water resources research; Soil moisture; Sea Level; Density; Statistical Analysis; Probes; Moisture Content; Soil Water; Specific Humidity; Marine DO - http://dx.doi.org/10.1002/wrcr.20187 ER - TY - JOUR T1 - Resilience certification for commercial buildings: a study of stakeholder perspectives AN - 1496888835; 19001163 AB - Infrastructure resilience has become a primary objective for homeland and national security organizations over the past decade. Recent initiatives have focused on resilient building design, and one approach under consideration is a voluntary resilience certification program for commercial buildings. The intent of this program would be to encourage the adoption of resilient design practices in construction and planning of the buildings. While resilience may be a frequently discussed concept within the security communities, its level of awareness within the construction, design, insurance, and building owner communities is not well known. Given the voluntary nature of the certification program under consideration, program development requires a comprehensive understanding of resilience as defined by the commercial building stakeholders. Toward this end, Sandia National Laboratories conducted a study of stakeholder perspectives on resilience to ascertain factors that would serve as motivation for participation in the resilience certification program. This paper describes how Sandia performed the study and the resulting conclusions. One of the key conclusions that the study found is that the term resilience is unfamiliar to many and inconsistently defined across the industries. Those familiar with the term frequently linked it to sustainability concepts. The study also found that increased participation in the resilience certification program is very likely affected by demonstrable returns on resilience investments and a public-private partnership model for program administration. JF - Environment Systems & Decisions AU - Jennings, Barbara J AU - Vugrin, Eric D AU - Belasich, Deborah K AD - Sandia National Laboratories, Policy and Decision Analytics Department, P.O. Box 5800, Albuquerque, NM, 87185-1137, USA Y1 - 2013/06// PY - 2013 DA - June 2013 SP - 184 EP - 194 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 33 IS - 2 SN - 2194-5403, 2194-5403 KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Resilience KW - Security KW - Communities KW - Commercial buildings KW - Design engineering KW - Construction KW - Certification KW - Sustainability UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1496888835?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environment+Systems+%26+Decisions&rft.atitle=Resilience+certification+for+commercial+buildings%3A+a+study+of+stakeholder+perspectives&rft.au=Jennings%2C+Barbara+J%3BVugrin%2C+Eric+D%3BBelasich%2C+Deborah+K&rft.aulast=Jennings&rft.aufirst=Barbara&rft.date=2013-06-01&rft.volume=33&rft.issue=2&rft.spage=184&rft.isbn=&rft.btitle=&rft.title=Environment+Systems+%26+Decisions&rft.issn=21945403&rft_id=info:doi/10.1007%2Fs10669-013-9440-y LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-03-01 N1 - Number of references - 32 N1 - Last updated - 2016-08-08 DO - http://dx.doi.org/10.1007/s10669-013-9440-y ER - TY - JOUR T1 - Risk-Informed Analysis Applied to Small Modular Reactor Security AN - 1419367949; 18278235 AB - The traditional approach of determining a range of possible security threats to a nuclear facility using probability of attack is extremely difficult to model. Recent work at Sandia National Laboratories (SNL) characterizes a facility's security risk for a scenario in terms of level of difficulty an adversary would encounter in order to be reasonably sure of success. Scenarios with lower levels of difficulty can then be addressed through design changes or improvements to the physical protection system. This work evaluated the level of difficulty of a number of attack scenarios for Small Modular Reactors (SMRs), and provides insight to help designers optimize the protection of their facilities. JF - Transactions of the American Nuclear Society AU - Cipiti Benjamin, B AU - Wyss Gregory, D AU - Duran Felicia, A AD - Sandia National Laboratories, PO Box 5800 MS 0747, Albuquerque, NM 87185-0747, bbcipit@sandia.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 573 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Risk Abstracts; Health & Safety Science Abstracts KW - Security KW - Nuclear reactors KW - H 8000:Radiation Safety/Electrical Safety KW - R2 23020:Technological risks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1419367949?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Risk-Informed+Analysis+Applied+to+Small+Modular+Reactor+Security&rft.au=Cipiti+Benjamin%2C+B%3BWyss+Gregory%2C+D%3BDuran+Felicia%2C+A&rft.aulast=Cipiti+Benjamin&rft.aufirst=B&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=573&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-08-01 N1 - Number of references - 2 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Security; Nuclear reactors ER - TY - JOUR T1 - The cost of meeting increased cooling-water demands for CO (sub 2) capture and storage utilizing non-traditional waters from geologic saline formations AN - 1400618687; 2013-055490 AB - Deep (> approximately 800 m) saline water-bearing formations in the United States have substantial pore volume that is targeted for storage of carbon dioxide (CO (sub 2) ) and the associated saline water can be extracted to increase CO (sub 2) storage efficiency, manage pressure build up, and create a new water source that, once treated, can be used for power-plant cooling or other purposes. Extraction, treatment and disposal costs of saline formation water to meet added water demands from CO (sub 2) capture and storage (CCS) are discussed. This underutilized water source may be important in meeting new water demand associated with CCS. For a representative natural gas combined-cycle (NGCC) power plant, simultaneous extraction of brine from the storage formation could provide enough water to meet all CCS-related cooling demands for 177 out of the 185 (96 %) saline formations analyzed in this study. Calculated total cost of water extraction, treatment and disposal is less than 4.00 US Dollars (USD) m (super -3) for 93 % of the 185 formations considered. In 90 % of 185 formations, treated water costs are less than 10.00 USD tonne (super -1) of CO (sub 2) injected. On average, this represents approximately 6 % of the total CO (sub 2) capture and injection costs for the NGCC scenario. Copyright 2013 Springer-Verlag Berlin Heidelberg and Springer-Verlag Berlin Heidelberg (outside the USA) JF - Hydrogeology Journal AU - Klise, Geoffrey T AU - Roach, Jesse D AU - Kobos, Peter H AU - Heath, Jason E AU - Gutierrez, Karen A Y1 - 2013/05// PY - 2013 DA - May 2013 SP - 587 EP - 604 PB - Springer, Berlin - Heidelberg VL - 21 IS - 3 SN - 1431-2174, 1431-2174 KW - United States KW - Kansas Geological Survey data base KW - aquifer vulnerability KW - contaminant plumes KW - data processing KW - sandstone KW - power plants KW - storage coefficient KW - KGS data base KW - climate change KW - reservoir rocks KW - ground water KW - data management KW - carbon dioxide KW - waste management KW - mitigation KW - sedimentary rocks KW - water treatment KW - data bases KW - stratigraphic units KW - sedimentary structures KW - saline composition KW - demand KW - water use KW - carbon sequestration KW - injection KW - pollution KW - porous materials KW - information management KW - hydroelectric energy KW - cost KW - aquifers KW - regional KW - greenhouse gases KW - waste disposal KW - carbonate rocks KW - water resources KW - clastic rocks KW - salinization KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1400618687?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=The+cost+of+meeting+increased+cooling-water+demands+for+CO+%28sub+2%29+capture+and+storage+utilizing+non-traditional+waters+from+geologic+saline+formations&rft.au=Klise%2C+Geoffrey+T%3BRoach%2C+Jesse+D%3BKobos%2C+Peter+H%3BHeath%2C+Jason+E%3BGutierrez%2C+Karen+A&rft.aulast=Klise&rft.aufirst=Geoffrey&rft.date=2013-05-01&rft.volume=21&rft.issue=3&rft.spage=587&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/10.1007%2Fs10040-012-0951-2 L2 - http://www.springerlink.com/content/102028/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2013-01-01 N1 - Number of references - 50 N1 - Document feature - illus. incl. 4 tables, sketch maps N1 - Last updated - 2013-07-18 N1 - SubjectsTermNotLitGenreText - aquifer vulnerability; aquifers; carbon dioxide; carbon sequestration; carbonate rocks; clastic rocks; climate change; contaminant plumes; cost; data bases; data management; data processing; demand; greenhouse gases; ground water; hydroelectric energy; information management; injection; Kansas Geological Survey data base; KGS data base; mitigation; pollution; porous materials; power plants; regional; reservoir rocks; saline composition; salinization; sandstone; sedimentary rocks; sedimentary structures; storage coefficient; stratigraphic units; United States; waste disposal; waste management; water resources; water treatment; water use DO - http://dx.doi.org/10.1007/s10040-012-0951-2 ER - TY - JOUR T1 - Analysis of high pressure premixed flames using Equivalent Reactor Networks for predicting NOx emissions AN - 1458547069; 18742367 AB - This paper describes a computational study of lean premixed high pressure methane-air flames, using Computational Fluid Dynamics (CFD) together with a reactor network approach. A detailed chemical reaction mechanism is employed to predict pollutant concentrations, placing emphasis on nitrogen oxide emissions. The reacting flow field is divided into separate zones in which homogeneity of the physical and chemical conditions prevails. The defined zones are interconnected forming an Equivalent Reactor Network (ERN). Three flames are examined for which experimental data is available. Flame A is characterised by an equivalence ratio of 0.43 while Flames B and C are richer with equivalence ratios of 0.5 and 0.56 respectively. Computations are performed for a range of operating conditions, quantifying the effect in the emitted NOx levels. Model predictions are compared against the available experimental data. Sensitivity analysis is performed to investigate the effect of the network size, in order to define the optimum number of reactors for accurate predictions of the species mass fractions. JF - Fuel AU - Lyra, S AU - Cant, R S AD - Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK, snlyra@sandia.gov Y1 - 2013/04/22/ PY - 2013 DA - 2013 Apr 22 SP - 261 EP - 268 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 107 SN - 0016-2361, 0016-2361 KW - Pollution Abstracts KW - Prediction KW - Photochemicals KW - Sensitivity analysis KW - Chemical reactions KW - Fuels KW - Emissions KW - Fluid dynamics KW - Nitrogen oxides KW - P 0000:AIR POLLUTION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1458547069?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Fuel&rft.atitle=Analysis+of+high+pressure+premixed+flames+using+Equivalent+Reactor+Networks+for+predicting+NOx+emissions&rft.au=Lyra%2C+S%3BCant%2C+R+S&rft.aulast=Lyra&rft.aufirst=S&rft.date=2013-04-22&rft.volume=107&rft.issue=&rft.spage=261&rft.isbn=&rft.btitle=&rft.title=Fuel&rft.issn=00162361&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-01 N1 - Number of references - 25 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Prediction; Photochemicals; Sensitivity analysis; Chemical reactions; Fuels; Fluid dynamics; Emissions; Nitrogen oxides ER - TY - JOUR T1 - Computing gravity-driven viscous fingering in complex subsurface geometries: A high-order discontinuous Galerkin approach AN - 1832583358; 669161-10 AB - We present a formulation of the discontinuous Galerkin method aimed for simulations of gravity-driven viscous fingering instabilities occurring in porous media flow. Specifically, we are targeting applications characterized by complex geometrical features. Viscous fingering instabilities play a very important role in carbon sequestration in brine aquifers. The proposed method has the ability to preserve high order of accuracy on completely unstructured meshes, a feature that makes it ideal for high-fidelity computations of the challenging fingering flow patterns and very complex geometries of actual reservoirs and aquifers. An extensive set of numerical computations is also included, to confirm the stability, accuracy, and robustness of the method. Copyright 2013 Springer Science+Business Media Dordrecht JF - Computational Geosciences AU - Gerstenberger, A AU - Scovazzi, G AU - Collis, S S Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 351 EP - 372 PB - Springer, Dordrecht VL - 17 IS - 2 SN - 1420-0597, 1420-0597 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832583358?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computational+Geosciences&rft.atitle=Computing+gravity-driven+viscous+fingering+in+complex+subsurface+geometries%3A+A+high-order+discontinuous+Galerkin+approach&rft.au=Gerstenberger%2C+A%3BScovazzi%2C+G%3BCollis%2C+S+S&rft.aulast=Gerstenberger&rft.aufirst=A&rft.date=2013-04-01&rft.volume=17&rft.issue=2&rft.spage=351&rft.isbn=&rft.btitle=&rft.title=Computational+Geosciences&rft.issn=14200597&rft_id=info:doi/10.1007%2Fs10596-012-9334-y L2 - http://www.springerlink.com/content/101744/ LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - SuppNotes - Sandia National Laboratories is a multiprogram laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin company, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1007/s10596-012-9334-y ER - TY - JOUR T1 - Observations of volcanic activity at Kilauea Volcano, Hawaii using rotational seismometers AN - 1416690995; 2013-058882 JF - Seismological Research Letters AU - Abbott, R E AU - Hart, D AU - Thelen, W A AU - Koper, Keith AU - Wong, Ivan Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 344 PB - Seismological Society of America, El Cerrito, CA VL - 84 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - precursors KW - monitoring KW - Hawaii Island KW - geologic hazards KW - Hawaii County Hawaii KW - Hawaii KW - East Pacific Ocean Islands KW - seismographs KW - volcanic risk KW - eruptions KW - Oceania KW - natural hazards KW - ground motion KW - risk assessment KW - Polynesia KW - Kilauea KW - earthquakes KW - instruments KW - 24:Quaternary geology KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416690995?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Observations+of+volcanic+activity+at+Kilauea+Volcano%2C+Hawaii+using+rotational+seismometers&rft.au=Abbott%2C+R+E%3BHart%2C+D%3BThelen%2C+W+A%3BKoper%2C+Keith%3BWong%2C+Ivan&rft.aulast=Abbott&rft.aufirst=R&rft.date=2013-04-01&rft.volume=84&rft.issue=2&rft.spage=344&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - Seismological Society of America annual meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - PubXState - CA N1 - Last updated - 2016-09-16 N1 - SubjectsTermNotLitGenreText - earthquakes; East Pacific Ocean Islands; eruptions; geologic hazards; ground motion; Hawaii; Hawaii County Hawaii; Hawaii Island; instruments; Kilauea; monitoring; natural hazards; Oceania; Polynesia; precursors; risk assessment; seismographs; United States; volcanic risk ER - TY - JOUR T1 - Applying waveform correlation to three aftershock sequences AN - 1328506201; 2013-035166 AB - For nuclear explosion seismic monitoring, major aftershock sequences can be a significant problem because each event must be analyzed. Fortunately, the high degree of waveform similarity expected within aftershock sequences offers a way to more quickly and robustly process these events than is possible using traditional methods (e.g., short-term average/long-term average detection). We explore how waveform correlation can be incorporated into an automated event detection system to improve both the timeliness and the quality of the resultant bulletin. With our Waveform Correlation Detector we processed three aftershock sequences: the 1994 Northridge earthquake, the 2005 Kashmir earthquake, and the 2008 Wenchuan earthquake. Our system compared incoming waveform data to a library of known master events and identified incoming waveform data that correlated well with a master event as a repeating event. We break down our results to show how many master events found matches, the distribution in family size, and the effect of distance and fault characteristics on the results. Between 24% and 92% of the events in each sequence were recognized as similar events. JF - Bulletin of the Seismological Society of America AU - Slinkard, Megan E AU - Carr, Dorthe B AU - Young, Christopher J Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 675 EP - 693 PB - Seismological Society of America, Berkeley, CA VL - 103 IS - 2A SN - 0037-1106, 0037-1106 KW - United States KW - technology KW - Pakistan KW - monitoring KW - Far East KW - explosions KW - magnitude KW - waveforms KW - California KW - aftershocks KW - detection KW - Indian Peninsula KW - Wenchuan earthquake 2008 KW - propagation KW - Northridge earthquake 1994 KW - Kashmir earthquake 2005 KW - algorithms KW - nuclear explosions KW - Asia KW - earthquakes KW - faults KW - China KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1328506201?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Applying+waveform+correlation+to+three+aftershock+sequences&rft.au=Slinkard%2C+Megan+E%3BCarr%2C+Dorthe+B%3BYoung%2C+Christopher+J&rft.aulast=Slinkard&rft.aufirst=Megan&rft.date=2013-04-01&rft.volume=103&rft.issue=2A&rft.spage=675&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120120058 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 22 N1 - PubXState - CA N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2013-04-19 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - aftershocks; algorithms; Asia; California; China; detection; earthquakes; explosions; Far East; faults; Indian Peninsula; Kashmir earthquake 2005; magnitude; monitoring; Northridge earthquake 1994; nuclear explosions; Pakistan; propagation; technology; United States; waveforms; Wenchuan earthquake 2008 DO - http://dx.doi.org/10.1785/0120120058 ER - TY - JOUR T1 - REAcct: a scenario analysis tool for rapidly estimating economic impacts of major natural and man-made hazards AN - 1500799391; 19001156 AB - The REAcct (for Regional Economic Accounting) tool was developed for estimating order-of-magnitude economic impacts within DHS scenario analysis. REAcct uses input-output modeling, geo-spatial data computational tools, and publically available economic data and allows for detailed specification of sectors, regions, and disruption intervals. Direct impacts are estimated as changes in output and employment; total (direct plus indirect) impacts are calculated using regional total and final demand multipliers. In total, the REAcct framework and software allow for scenario analysts to understand and assess the interdependent relationships between critical infrastructures, economic industries, and consumers that are essential to broader homeland security scenario analysis. JF - Environment Systems & Decisions AU - Vargas, Vanessa N AU - Ehlen, Mark A AD - Sandia National Laboratories, P.O. Box 1515, Albuquerque, NM, 87123-1137, USA Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 76 EP - 88 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 33 IS - 1 SN - 2194-5403, 2194-5403 KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Estimating KW - Economics KW - Economic analysis KW - Regional KW - Homeland security KW - Economic impact KW - Tools KW - Decisions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1500799391?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environment+Systems+%26+Decisions&rft.atitle=REAcct%3A+a+scenario+analysis+tool+for+rapidly+estimating+economic+impacts+of+major+natural+and+man-made+hazards&rft.au=Vargas%2C+Vanessa+N%3BEhlen%2C+Mark+A&rft.aulast=Vargas&rft.aufirst=Vanessa&rft.date=2013-03-01&rft.volume=33&rft.issue=1&rft.spage=76&rft.isbn=&rft.btitle=&rft.title=Environment+Systems+%26+Decisions&rft.issn=21945403&rft_id=info:doi/10.1007%2Fs10669-012-9430-5 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-03-01 N1 - Number of references - 28 N1 - Last updated - 2016-08-08 DO - http://dx.doi.org/10.1007/s10669-012-9430-5 ER - TY - JOUR T1 - Design for resilience in infrastructure distribution networks AN - 1500758901; 19001154 AB - The recognition that resilience is a critical aspect of infrastructure security has caused the national and homeland security communities to ask "How does one ensure infrastructure resilience?" Previous network resilience analysis methods have generally focused on either pre-disruption prevention investments or post-disruption recovery strategies. This paper expands on those methods by introducing a stochastic optimization model for designing network infrastructure resilience that simultaneously considers pre- and post-disruption activities. The model seeks investment-recovery combinations that minimize the overall cost to a distribution network across a set of disruption scenarios. A set of numerical experiments illustrates how changes to disruption scenarios probabilities affect the optimal resilient design investments. JF - Environment Systems & Decisions AU - Turnquist, Mark AU - Vugrin, Eric AD - Sandia National Laboratories, Albuquerque, NM, USA Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 104 EP - 120 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 33 IS - 1 SN - 2194-5403, 2194-5403 KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Resilience KW - Infrastructure KW - Mathematical models KW - Investments KW - Design engineering KW - Networks KW - Homeland security KW - Optimization UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1500758901?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environment+Systems+%26+Decisions&rft.atitle=Design+for+resilience+in+infrastructure+distribution+networks&rft.au=Turnquist%2C+Mark%3BVugrin%2C+Eric&rft.aulast=Turnquist&rft.aufirst=Mark&rft.date=2013-03-01&rft.volume=33&rft.issue=1&rft.spage=104&rft.isbn=&rft.btitle=&rft.title=Environment+Systems+%26+Decisions&rft.issn=21945403&rft_id=info:doi/10.1007%2Fs10669-012-9428-z LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-03-01 N1 - Number of references - 46 N1 - Last updated - 2016-08-08 DO - http://dx.doi.org/10.1007/s10669-012-9428-z ER - TY - JOUR T1 - Multi-hazard, multi-infrastructure, economic scenario analysis AN - 1496886051; 19001158 AB - Over the past 10 years, the National Infrastructure Simulation and Analysis Center (NISAC) has conducted over 150 detailed multi-hazard, multi-infrastructure scenario analyses of a wide range of man-made and natural disasters. Using a model-based implementation of the Department of Homeland Security risk management framework, NISAC analyzes scenarios ranging from extreme-event situational awareness to long-term strategic policy for improved homeland security and resilience to these events. This article describes the essential elements of the NISAC scenario analysis process, the toolkit of subject-matter expertise and models used, with a particular focus on the economics component. An example set of Hurricane Katrina economic-analysis results is used to illustrate basic elements of NISAC economics scenario analysis. JF - Environment Systems & Decisions AU - Ehlen, Mark A AU - Vargas, Vanessa N AD - Sandia National Laboratories, P.O. Box 1515, Albuquerque, NM, 87123-1137, USA maehlen@sandia.gov Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 60 EP - 75 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 33 IS - 1 SN - 2194-5403, 2194-5403 KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Resilience KW - Situational awareness KW - Mathematical models KW - Computer simulation KW - Economic analysis KW - Homeland security KW - Tools KW - Natural disasters UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1496886051?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environment+Systems+%26+Decisions&rft.atitle=Multi-hazard%2C+multi-infrastructure%2C+economic+scenario+analysis&rft.au=Ehlen%2C+Mark+A%3BVargas%2C+Vanessa+N&rft.aulast=Ehlen&rft.aufirst=Mark&rft.date=2013-03-01&rft.volume=33&rft.issue=1&rft.spage=60&rft.isbn=&rft.btitle=&rft.title=Environment+Systems+%26+Decisions&rft.issn=21945403&rft_id=info:doi/10.1007%2Fs10669-013-9432-y LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-03-01 N1 - Number of references - 22 N1 - Last updated - 2016-08-08 DO - http://dx.doi.org/10.1007/s10669-013-9432-y ER - TY - JOUR T1 - Internal structure of Erebus Volcano, Antarctica imaged by high-resolution active-source seismic tomography and coda interferometry AN - 1366815707; 2013-046052 AB - Erebus volcano, Antarctica has hosted a persistent convecting phonolite lava lake for over 40 years. The lake produces small (VEI 0-1) Strombolian eruptions resulting from gas slugs rising through the upper conduit system. High-resolution (to scale lengths of several hundreds of meters) three-dimensional P-wave tomographic velocity images were obtained to a depth of approximately 600 m below the volcano surface. Data were collected using 91 seismographs deployed over an approximately 4 by 4 km area of the summit region. Seismic illumination was provided by 12 chemical shots emplaced in shallow snow and ice boreholes. P-wave direct arrival travel-time measurements were used to invert for strong velocity anomalies (with spatial variations in V (sub p) exceeding + or -1 km/s) associated with the uppermost few km. Shallow anomalies correlate with fumarolic ice caves, a prominent radial chilled dike, and ring structures associated with the caldera rim. Conduit structures feeding the lava lake and other vents within the Inner Crater are evidently too small (e.g., less than many 10 s of meters) to be imaged under the resolution limits of this experiment. However, combined velocity and coda interferometry scattering intensity images identify near-summit regions with both low velocity and high scattering that are candidates for magma accommodation. Results indicate a nonaxisymmetric near-summit magmatic system that is likely constrained by heterogeneous structures in the uppermost volcano. The most extensive volume of near-summit magma likely resides approximately 500 m NW of the active Inner Crater vents at depths of 500 m and more below the surface. Abstract Copyright (2013), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research AU - Zandomeneghi, D AU - Aster, R AU - Kyle, P AU - Barclay, A AU - Chaput, J AU - Knox, H Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 1067 EP - 1078 PB - American Geophysical Union, Washington, DC VL - 118 IS - 3 SN - 0148-0227, 0148-0227 KW - tomography KW - high-resolution methods KW - geophysical surveys KW - guided waves KW - geophysical methods KW - coda waves KW - elastic waves KW - Ross Island KW - interferometry KW - seismic methods KW - calderas KW - volcanic features KW - surface waves KW - Antarctica KW - volcanoes KW - surveys KW - seismic waves KW - geomorphology KW - Mount Erebus KW - 23:Geomorphology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1366815707?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research&rft.atitle=Internal+structure+of+Erebus+Volcano%2C+Antarctica+imaged+by+high-resolution+active-source+seismic+tomography+and+coda+interferometry&rft.au=Zandomeneghi%2C+D%3BAster%2C+R%3BKyle%2C+P%3BBarclay%2C+A%3BChaput%2C+J%3BKnox%2C+H&rft.aulast=Zandomeneghi&rft.aufirst=D&rft.date=2013-03-01&rft.volume=118&rft.issue=3&rft.spage=1067&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research&rft.issn=01480227&rft_id=info:doi/10.1002%2Fjgrb.50073 L2 - http://www.agu.org/journals/jgr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2013-01-01 N1 - Number of references - 43 N1 - PubXState - DC N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - Antarctica; calderas; coda waves; elastic waves; geomorphology; geophysical methods; geophysical surveys; guided waves; high-resolution methods; interferometry; Mount Erebus; Ross Island; seismic methods; seismic waves; surface waves; surveys; tomography; volcanic features; volcanoes DO - http://dx.doi.org/10.1002/jgrb.50073 ER - TY - JOUR T1 - Influence of pressure change during hydraulic tests on fracture aperture AN - 1366813975; 2013-045941 AB - In a series of field experiments, we evaluate the influence of a small water pressure change on fracture aperture during a hydraulic test. An experimental borehole is instrumented at the Korea Atomic Energy Research Institute (KAERI) Underground Research Tunnel (KURT). The target fracture for testing was found from the analyses of borehole logging and hydraulic tests. A double packer system was developed and installed in the test borehole to directly observe the aperture change due to water pressure change. Using this packer system, both aperture and flow rate are directly observed under various water pressures. Results indicate a slight change in fracture hydraulic head leads to an observable change in aperture. This suggests that aperture change should be considered when analyzing hydraulic test data from a sparsely fractured rock aquifer. Abstract Copyright (2012), National Ground Water Association. JF - Ground Water AU - Ji, Sung-Hoon AU - Koh, Yong-Kwon AU - Kuhlman, Kristopher L AU - Lee, Moo Yul AU - Choi, Jong Won Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 298 EP - 304 PB - Wiley-Blackwell on behalf of National Ground Water Association, Westerville, OH VL - 51 IS - 2 SN - 0017-467X, 0017-467X KW - Far East KW - isotopes KW - data acquisition KW - data processing KW - preferential flow KW - reservoir rocks KW - radioactive waste KW - ground water KW - fractures KW - radioactive isotopes KW - Korean Underground Research Tunnel KW - Asia KW - toxic materials KW - monitoring KW - connectivity KW - pollution KW - porous materials KW - migration of elements KW - Korea KW - borehole televiewers KW - aquifers KW - boreholes KW - transmissivity KW - biosphere KW - Daejeon South Korea KW - underground installations KW - hydraulic conductivity KW - waste disposal KW - South Korea KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1366813975?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ground+Water&rft.atitle=Influence+of+pressure+change+during+hydraulic+tests+on+fracture+aperture&rft.au=Ji%2C+Sung-Hoon%3BKoh%2C+Yong-Kwon%3BKuhlman%2C+Kristopher+L%3BLee%2C+Moo+Yul%3BChoi%2C+Jong+Won&rft.aulast=Ji&rft.aufirst=Sung-Hoon&rft.date=2013-03-01&rft.volume=51&rft.issue=2&rft.spage=298&rft.isbn=&rft.btitle=&rft.title=Ground+Water&rft.issn=0017467X&rft_id=info:doi/10.1111%2Fj.1745-6584.2012.00968.x L2 - http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1745-6584 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2013-01-01 N1 - Number of references - 19 N1 - PubXState - OH N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-09-16 N1 - CODEN - GRWAAP N1 - SubjectsTermNotLitGenreText - aquifers; Asia; biosphere; borehole televiewers; boreholes; connectivity; Daejeon South Korea; data acquisition; data processing; Far East; fractures; ground water; hydraulic conductivity; isotopes; Korea; Korean Underground Research Tunnel; migration of elements; monitoring; pollution; porous materials; preferential flow; radioactive isotopes; radioactive waste; reservoir rocks; South Korea; toxic materials; transmissivity; underground installations; waste disposal DO - http://dx.doi.org/10.1111/j.1745-6584.2012.00968.x ER - TY - JOUR T1 - The molecular mystique of tetrodotoxin. AN - 1284623841; 23261990 AB - In many respects tetrodotoxin (TTX) is the quintessential natural toxin. It is unequivocally toxic to mammals with LD(50) values for mice in the range of 10 μg/kg (intraperitoneal), 16 μg/kg (subcutaneous), and 332 μg/kg (oral) (Kao, 1966). Its biothreat status is recognized by its listing as a "Select Agent" by the US Department of Health and Human Services which includes regulated agents "determined to have the potential to pose a severe threat to both human and animal health" (http://www.selectagents.gov/). It has a well-defined cellular target (i.e., NaV channels) and pharmacological mode of action (i.e., block of nerve and muscle action potentials), and it is an indispensable chemical tool in neuroscience. It is widely distributed in marine and terrestrial ecosystems where it plays a role in the chemical ecology of predator-prey relationships and drives evolutionary selection of TTX-resistance (Hanifin, 2010; Williams, 2010; Zimmer and Ferrer, 2007). Lastly, TTX has acquired a certain mystique in scientific lore attributable to many fascinating aspects of its natural history and molecular interactions as presented in selected summary below. Additional information may be found in other excellent reviews (Fozzard and Lipkind, 2010; Kao, 1966; Lee and Ruben, 2008; Narahashi, 2001, 2008). JF - Toxicon : official journal of the International Society on Toxinology AU - Moczydlowski, Edward G AD - Nanobiology, Sandia National Laboratories, P.O. Box 5800, MS1413, Albuquerque, NM 87185-1413, USA. Y1 - 2013/03/01/ PY - 2013 DA - 2013 Mar 01 SP - 165 EP - 183 VL - 63 KW - Sodium Channel Blockers KW - 0 KW - Sodium Channels KW - Saxitoxin KW - 35523-89-8 KW - Tetrodotoxin KW - 4368-28-9 KW - Index Medicus KW - Rats KW - Molecular Structure KW - Animals KW - Sodium Channels -- genetics KW - Humans KW - Molecular Sequence Data KW - Saxitoxin -- toxicity KW - Mice KW - Amino Acid Sequence KW - Protein Structure, Tertiary KW - Sodium Channels -- drug effects KW - Tetrodotoxin -- metabolism KW - Sodium Channel Blockers -- metabolism KW - Tetrodotoxin -- toxicity KW - Sodium Channel Blockers -- toxicity KW - Tetrodotoxin -- chemistry KW - Tetraodontiformes -- physiology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1284623841?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Toxicon+%3A+official+journal+of+the+International+Society+on+Toxinology&rft.atitle=The+molecular+mystique+of+tetrodotoxin.&rft.au=Moczydlowski%2C+Edward+G&rft.aulast=Moczydlowski&rft.aufirst=Edward&rft.date=2013-03-01&rft.volume=63&rft.issue=&rft.spage=165&rft.isbn=&rft.btitle=&rft.title=Toxicon+%3A+official+journal+of+the+International+Society+on+Toxinology&rft.issn=1879-3150&rft_id=info:doi/10.1016%2Fj.toxicon.2012.11.026 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-07-23 N1 - Date created - 2013-02-05 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1016/j.toxicon.2012.11.026 ER - TY - JOUR T1 - Self-limiting lithiation in silicon nanowires. AN - 1313429879; 23272994 AB - The rates of charging and discharging in lithium-ion batteries (LIBs) are critically controlled by the kinetics of Li insertion and extraction in solid-state electrodes. Silicon is being intensively studied as a high-capacity anode material for LIBs. However, the kinetics of Li reaction and diffusion in Si remain unclear. Here we report a combined experimental and theoretical study of the lithiation kinetics in individual Si nanowires. By using in situ transmission electron microscopy, we measure the rate of growth of a surface layer of amorphous Li(x)Si in crystalline Si nanowires during the first lithiation. The results show the self-limiting lithiation, which is attributed to the retardation effect of the lithiation-induced stress. Our work provides a direct measurement of the nanoscale growth kinetics in lithiated Si, and has implications on nanostructures for achieving the high capacity and high rate in the development of high performance LIBs. JF - ACS nano AU - Liu, Xiao Hua AU - Fan, Feifei AU - Yang, Hui AU - Zhang, Sulin AU - Huang, Jian Yu AU - Zhu, Ting AD - Center for Integrated Nanotechnologies-CINT, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA. lxhua99@gmail.com Y1 - 2013/02/26/ PY - 2013 DA - 2013 Feb 26 SP - 1495 EP - 1503 VL - 7 IS - 2 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313429879?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+nano&rft.atitle=Self-limiting+lithiation+in+silicon+nanowires.&rft.au=Liu%2C+Xiao+Hua%3BFan%2C+Feifei%3BYang%2C+Hui%3BZhang%2C+Sulin%3BHuang%2C+Jian+Yu%3BZhu%2C+Ting&rft.aulast=Liu&rft.aufirst=Xiao&rft.date=2013-02-26&rft.volume=7&rft.issue=2&rft.spage=1495&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/10.1021%2Fnn305282d LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-08-22 N1 - Date created - 2013-02-27 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1021/nn305282d ER - TY - CPAPER T1 - Exploring Combustion Chemistry in Laboratory-Based Flames T2 - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AN - 1369227323; 6213432 JF - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AU - Hansen, Nils Y1 - 2013/02/14/ PY - 2013 DA - 2013 Feb 14 KW - Combustion UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1369227323?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2013%29&rft.atitle=Exploring+Combustion+Chemistry+in+Laboratory-Based+Flames&rft.au=Hansen%2C+Nils&rft.aulast=Hansen&rft.aufirst=Nils&rft.date=2013-02-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2013%29&rft.issn=&rft_id=info:doi/ L2 - http://aaas.confex.com/aaas/2013/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-31 N1 - Last updated - 2013-06-19 ER - TY - JOUR T1 - Enrichment of stable Cs and Rb in Savannah River Site soils AN - 1442373473; 2013-081912 AB - The Savannah River Site (SRS) in South Carolina is the focus of an extensive remediation project. Cs-137 is a well-known fission product that has been produced, stored, and handled in this and other US Department of Energy facilities. Documenting the mobility of (super 137) Cs and its sorption by geologic materials is important to predict long-term behavior of (super 137) Cs migrating from contaminated sites such as the SRS. Three uncontaminated (radionuclide free) soil cores were used to study Cs and other alkali metals in the SRS soils. Based on the mineralogy, clay content, and parent material, each core is known to represent a different stage of weathering. For each core, depth profiles of (1) mineral composition, (2) acid-extractable Cs, Rb, K, Sr, and Ba ions, and (3) clay content were collected. These data permit a test of our hypotheses that (1) Cs has been favorably enriched with respect to K in the soils as a result of long-term weathering processes and (2) that this Cs will affect the ability of soils at the SRS to adsorb (super 137) Cs and (3) interlayer wedge zones in highly weathered mica particles, now mostly hydroxy-interlayered vermiculite (HIV), may be responsible for selective uptake of Cs and Rb from soil solution and for their fixation. Rietveld modeling of synchrotron powder X-Ray diffractograms provides a quantitative determination of the clay fraction (< 2um). Acid extractions of ions from soil fine fractions show that the ion concentrations vary sympathetically with depth. The peak in extracted ion concentration in each core peaks not far below the point where the clay content becomes more than 10% of the soil (going downward) and thus seems to be controlled more by clay content than by clay mineralogy. Stable Cs is significantly enriched with respect to K in all three soil cores. During soil formation, K is increasingly removed as weathering progresses, and Cs and Rb are preferentially retained in the soils. The longer a soil has undergone weathering at the SRS, the more enriched it has become in Cs/K (and Rb/K) with respect to the average for upper continental crust. Preliminary molecular modeling results support the hypothesis that Cs is the sterically most favored ion in the interlayer wedge zone of HIV. These preliminary results suggest that Cs can be sorbed effectively at the wedge-apex sites of HIV by electrostatic attraction. JF - Abstracts with Programs - Geological Society of America AU - Zaunbrecher, Laura K AU - Elliott, W Crawford AU - Cygan, Randall T AU - Perdrial, Nicolas AU - Wampler, J Marion AU - Kaplan, Daniel I AU - Teich-McGoldrick, Stephanie AU - Anonymous Y1 - 2013/02// PY - 2013 DA - February 2013 SP - 25 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 2 SN - 0016-7592, 0016-7592 KW - United States KW - soils KW - alkaline earth metals KW - South Carolina KW - isotopes KW - enrichment KW - rubidium KW - alkali metals KW - pollution KW - cores KW - radioactive isotopes KW - Cs-137 KW - cesium KW - barium KW - soil pollution KW - metals KW - potassium KW - Savannah River Site KW - strontium KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1442373473?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Enrichment+of+stable+Cs+and+Rb+in+Savannah+River+Site+soils&rft.au=Zaunbrecher%2C+Laura+K%3BElliott%2C+W+Crawford%3BCygan%2C+Randall+T%3BPerdrial%2C+Nicolas%3BWampler%2C+J+Marion%3BKaplan%2C+Daniel+I%3BTeich-McGoldrick%2C+Stephanie%3BAnonymous&rft.aulast=Zaunbrecher&rft.aufirst=Laura&rft.date=2013-02-01&rft.volume=45&rft.issue=2&rft.spage=25&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Southeastern Section, 62nd annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-10-17 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; barium; cesium; cores; Cs-137; enrichment; isotopes; metals; pollution; potassium; radioactive isotopes; rubidium; Savannah River Site; soil pollution; soils; South Carolina; strontium; United States ER - TY - JOUR T1 - Pore-scale evaluation of uranyl phosphate precipitation in a model groundwater system AN - 1434008584; 2013-072304 AB - The abiotic precipitation of uranium (U(VI)) was evaluated in a microfluidic pore network (i.e., micromodel) to assess the efficacy of using a phosphate amendment to immobilize uranium in groundwater. U(VI) was mixed transverse to the direction of flow with hydrogen phosphate (HPO (sub 4) (super 2-) ), in the presence or absence of calcium (Ca (super 2+) ) or sulfate (SO (sub 4) (super 2-) ), in order to identify precipitation rates, morphology and types of minerals formed, and effects of mineral precipitates on pore blockage. Precipitation occurred over the time scale of hours to days. Relative to when only U(VI) and HPO (sub 4) (super 2-) were present, precipitation rates were 2.3 times slower when SO (sub 4) (super 2-) was present, and 1.4 times faster when Ca (super 2+) was present; larger crystals formed in the presence of SO (sub 4) (super 2-) . Raman backscattering spectroscopy and micro-X-ray diffraction results both showed that the only mineral precipitated was chernikovite, UO (sub 2) HPO (sub 4) . 4H (sub 2) O; energy dispersive X-ray spectroscopy results indicate that Ca and S are not incorporated into the chernikovite lattice. A pore-scale model was developed, and simulation results of saturation ratio (SR = Q/K (sub sp) ) suggest that chernikovite is the least thermodynamically favored mineral to precipitate (0 10 (super 5) ). Fluorescent tracer studies and laser confocal microscopy images showed that densely aggregated precipitates blocked pores and reduced permeability. The results suggest that uranium precipitation with phosphate as chernikovite is rapid on the time scale of remediation for the conditions considered and can block pores, alter fluid flow paths, and potentially limit mixing and precipitation. Abstract Copyright (2013), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Fanizza, Michael F AU - Yoon, Hongkyu AU - Zhang, Changyong AU - Oostrom, Martinus AU - Wietsma, Thomas W AU - Hess, Nancy J AU - Bowden, Mark E AU - Strathmann, Timothy J AU - Finneran, Kevin T AU - Werth, Charles J Y1 - 2013/02// PY - 2013 DA - February 2013 SP - 874 EP - 890 PB - American Geophysical Union, Washington, DC VL - 49 IS - 2 SN - 0043-1397, 0043-1397 KW - calcium KW - autunite KW - remediation KW - ground water KW - mixing KW - valency KW - spectra KW - mobility KW - alkaline earth metals KW - experimental studies KW - sulfate ion KW - numerical models KW - secondary minerals KW - uranyl ion KW - phosphates KW - migration of elements KW - uranium minerals KW - Raman spectra KW - precipitation KW - metals KW - chernikovite KW - uranyl phosphate KW - uranium KW - actinides KW - pore water KW - permeability KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434008584?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Pore-scale+evaluation+of+uranyl+phosphate+precipitation+in+a+model+groundwater+system&rft.au=Fanizza%2C+Michael+F%3BYoon%2C+Hongkyu%3BZhang%2C+Changyong%3BOostrom%2C+Martinus%3BWietsma%2C+Thomas+W%3BHess%2C+Nancy+J%3BBowden%2C+Mark+E%3BStrathmann%2C+Timothy+J%3BFinneran%2C+Kevin+T%3BWerth%2C+Charles+J&rft.aulast=Fanizza&rft.aufirst=Michael&rft.date=2013-02-01&rft.volume=49&rft.issue=2&rft.spage=874&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2Fwrcr.20088 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2013-01-01 N1 - Number of references - 84 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-09-20 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - actinides; alkaline earth metals; autunite; calcium; chernikovite; experimental studies; ground water; metals; migration of elements; mixing; mobility; numerical models; permeability; phosphates; pore water; precipitation; Raman spectra; remediation; secondary minerals; spectra; sulfate ion; uranium; uranium minerals; uranyl ion; uranyl phosphate; valency DO - http://dx.doi.org/10.1002/wrcr.20088 ER - TY - JOUR T1 - Response of Castlegate Sandstone to true triaxial states of stress AN - 1416689341; 2013-061289 AB - A suite of true triaxial tests were performed on Castlegate sandstone to assess the influence of the intermediate principal stress on mechanical response and failure. Five independent deviatoric stress states were employed, for which the intermediate principal stress ranged from equal to minimum compression (axisymmetric compression) to maximum compression (axisymmetric extension). For each deviatoric stress state, five constant mean stress tests were conducted, covering mean stresses ranging from brittle to ductile failure. At low mean stresses, shear bands formed, and the peak stress required to induce failure decreased with increasing intermediate principal stress. Thus, failure at low mean stresses depends on the third invariant of deviatoric stress. Shear bands formed under all deviatoric stress states and over a wide range of mean stresses. The band angle (defined as the angle between the band normal and the direction of maximum compression) decreased with increasing mean stress. There was no clear trend in band angle with respect to intermediate principal stress; however, a small trend would be obscured by data scatter due to specimen variability. At higher mean stresses, no localization was observed. The upper bound mean stress at which shear localization occurred increased with increasing intermediate principal stress. Therefore, the mean stress that demarcates the brittle-ductile transition depends on the third invariant of deviatoric stress. Abstract Copyright (2013), . American Geophysical Union. All Rights Reserved. JF - Journal of Geophysical Research AU - Ingraham, M D AU - Issen, K A AU - Holcomb, D J Y1 - 2013/02// PY - 2013 DA - February 2013 SP - 536 EP - 552 PB - American Geophysical Union, Washington, DC VL - 118 IS - 2 SN - 0148-0227, 0148-0227 KW - failures KW - experimental studies KW - Castlegate Sandstone KW - Cretaceous KW - Mesaverde Group KW - sandstone KW - mechanical properties KW - deformation KW - Upper Cretaceous KW - triaxial tests KW - Mesozoic KW - rock mechanics KW - laboratory studies KW - sedimentary rocks KW - ductility KW - clastic rocks KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1416689341?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research&rft.atitle=Response+of+Castlegate+Sandstone+to+true+triaxial+states+of+stress&rft.au=Ingraham%2C+M+D%3BIssen%2C+K+A%3BHolcomb%2C+D+J&rft.aulast=Ingraham&rft.aufirst=M&rft.date=2013-02-01&rft.volume=118&rft.issue=2&rft.spage=536&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research&rft.issn=01480227&rft_id=info:doi/10.1002%2Fjgrb.50084 L2 - http://www.agu.org/journals/jgr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2013-01-01 N1 - Number of references - 42 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2015-02-19 N1 - SubjectsTermNotLitGenreText - Castlegate Sandstone; clastic rocks; Cretaceous; deformation; ductility; experimental studies; failures; laboratory studies; mechanical properties; Mesaverde Group; Mesozoic; rock mechanics; sandstone; sedimentary rocks; triaxial tests; Upper Cretaceous DO - http://dx.doi.org/10.1002/jgrb.50084 ER - TY - JOUR T1 - Kinetics and mechanism of solar-thermochemical H sub(2) production by oxidation of a cobalt ferrite-zirconia composite AN - 1323233444; 17736670 AB - Accurate knowledge of water splitting kinetics is essential for the design and optimization of high-temperature thermochemical cycles for solar-driven fuel production, but such crucial data are unavailable for virtually all redox materials of potential practical value. We describe an investigation of the redox activity and oxidation kinetics of cobalt ferrite, a promising material for this application that is representative of a broader class of metal-substituted ferrites. To enable repetitive cycling, ferrites must be supported on another oxide to avoid sintering and deactivation. Consequently, we synthesized a composite material using atomic layer deposition of cobalt and iron oxides on zirconia, a commonly used ferrite "support", to create a well-controlled, uniformly distributed composition. Our results show that the support is not an innocent bystander and that dissolved iron within it reacts by a different mechanism than embedded iron oxide particles in the matrix. Samples were thermally reduced at 1450 degree C under helium and oxidized with steam at realistic process temperatures ranging from 900 degree C to 1400 degree C. Experiments within a fluid-dynamically well-behaved stagnation-flow reactor, coupled with detailed numerical modelling of the transient H sub(2) production rates, allow us to effectively deconvolve experimental artefacts from intrinsic material behaviour over the entire time domain of the oxidation reaction. We find that second-order reaction and diffusion-limited mechanisms occur simultaneously at different oxidation rates and involve iron in two separate phases: (1) reduced Fe dissolved in the ZrO sub(2) support and (2) iron oxide located at the interface between embedded ferrite particles and the zirconia matrix. Surprisingly, we also identified a catalytic mechanism occurring at the highest temperatures by which steady-state production of H sub(2) and O sub(2) occurs. The results reported here, which include Arrhenius rate constants for both oxidation mechanisms, will enable high-fidelity computational simulation of this complex, but promising approach to renewable fuel production. JF - Energy & Environmental Science AU - Scheffe, Jonathan R AU - McDaniel, Anthony H AU - Allendorf, Mark D AU - Weimer, Alan W AD - Department of Chemical and Biological Engineering; 3415 Colorado Avenue, JSCBB Campus Box 596; Boulder; Colorado 80309-0424; USA; , amcdani@sandia.gov Y1 - 2013/02// PY - 2013 DA - Feb 2013 SP - 963 EP - 973 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 6 IS - 3 SN - 1754-5692, 1754-5692 KW - Environment Abstracts KW - Composite materials KW - Kinetics KW - Cobalt KW - Oxidation KW - Temperature KW - Simulation KW - Helium KW - Particulates KW - Iron KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1323233444?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+%26+Environmental+Science&rft.atitle=Kinetics+and+mechanism+of+solar-thermochemical+H+sub%282%29+production+by+oxidation+of+a+cobalt+ferrite-zirconia+composite&rft.au=Scheffe%2C+Jonathan+R%3BMcDaniel%2C+Anthony+H%3BAllendorf%2C+Mark+D%3BWeimer%2C+Alan+W&rft.aulast=Scheffe&rft.aufirst=Jonathan&rft.date=2013-02-01&rft.volume=6&rft.issue=3&rft.spage=963&rft.isbn=&rft.btitle=&rft.title=Energy+%26+Environmental+Science&rft.issn=17545692&rft_id=info:doi/10.1039%2Fc3ee23568h LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-04-01 N1 - Number of references - 37 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Composite materials; Cobalt; Kinetics; Oxidation; Temperature; Helium; Simulation; Particulates; Iron DO - http://dx.doi.org/10.1039/c3ee23568h ER - TY - JOUR T1 - The near-term risk of climate uncertainty among the U.S. states AN - 1291620921; 17671117 AB - This article describes a study employing a risk-assessment methodology for evaluating uncertain future climatic conditions. To understand the implications of uncertainty on risk and to provide a near-term rationale for policy interventions, the study estimated the impacts from responses to climate change on U.S. state- and national-level economic activity. The study used results of the climate-model CMIP3 dataset developed for the Intergovernmental Panel on Climate Change's (IPCC) Fourth Assessment Report to 1) estimate a proxy for representing climate uncertainty over the next 40 years, 2) map the simulated weather from the climate models hydrologically to the county level to determine the physical consequences on economic activity at the state level, and 3) perform a detailed, economy-wide, 70-industry analysis of economic impacts among the interdependent lower-48 states for the years 2010 through 2050. The analysis determined the interacting industry-level effects, employment impacts at the state level, interstate population migration, consequences to personal income, and ramifications for the U.S. trade balance. When compared to a baseline economic forecast, the calculations produced an average risk of damage of $1 trillion to the U.S. economy from climate change over the next 40 years, with losses in employment equivalent to nearly 7 million full-time jobs. Added uncertainty would increase the estimated risk. JF - Climatic Change AU - Backus, George A AU - Lowry, Thomas S AU - Warren, Drake E AD - Discrete Mathematics and Complex Systems Department, Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM, 87185, USA Y1 - 2013/02// PY - 2013 DA - February 2013 SP - 495 EP - 522 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 116 IS - 3-4 SN - 0165-0009, 0165-0009 KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); ANTE: Abstracts in New Technologies and Engineering (AN) KW - Uncertainty KW - Risk KW - Policies KW - Economics KW - Climate change KW - Climate KW - Hydrology KW - Employment KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1291620921?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climatic+Change&rft.atitle=The+near-term+risk+of+climate+uncertainty+among+the+U.S.+states&rft.au=Backus%2C+George+A%3BLowry%2C+Thomas+S%3BWarren%2C+Drake+E&rft.aulast=Backus&rft.aufirst=George&rft.date=2013-02-01&rft.volume=116&rft.issue=3-4&rft.spage=495&rft.isbn=&rft.btitle=&rft.title=Climatic+Change&rft.issn=01650009&rft_id=info:doi/10.1007%2Fs10584-012-0511-8 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-03-01 N1 - Number of references - 52 N1 - Last updated - 2016-10-04 DO - http://dx.doi.org/10.1007/s10584-012-0511-8 ER - TY - JOUR T1 - The application of systems engineering principles to the prioritization of sustainable nuclear fuel cycle options AN - 1282038529; 4390755 AB - We investigate the implementation of the principles of systems engineering in the U.S. Department of Energy's Fuel Cycle Technologies (FCT) Program to provide a framework for achieving its long-term mission of demonstrating and deploying sustainable nuclear fuel cycle options. A fuel cycle ''screening'' methodology is introduced that provides a systematic, objective, and traceable method for evaluating and categorizing nuclear fuel cycles according to their performance in meeting sustainability objectives. The goal of the systems engineering approach is to transparently define and justify the research and development (R&D) necessary to deploy sustainable fuel cycle technologies for a given set of national policy objectives. The approach provides a path for more efficient use of limited R&D resources and facilitates dialog among a variety of stakeholder groups interested in U.S. energy policy. Furthermore, the use of systems engineering principles will allow the FCT Program to more rapidly adapt to future policy changes, including any decisions based on recommendations of the Blue Ribbon Commission on America's Nuclear Future. Specifically, if the relative importance of policy objectives changes, the FCT Program will have a structured process to rapidly determine how this impacts potential fuel cycle performance and the prioritization of needed R&D for associated technologies. All rights reserved, Elsevier JF - Energy policy AU - Price, R R AU - Singh, B P AU - MacKinnon, R J AU - Sevougian, S David AD - Sandia National Laboratories Y1 - 2013/02// PY - 2013 DA - Feb 2013 SP - 205 EP - 217 VL - 53 SN - 0301-4215, 0301-4215 KW - Political Science KW - Energy policy KW - Research and development KW - Nuclear fuels KW - Nuclear energy KW - Decision analysis KW - Performance KW - U.S.A. KW - Sustainability UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282038529?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aibss&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+policy&rft.atitle=The+application+of+systems+engineering+principles+to+the+prioritization+of+sustainable+nuclear+fuel+cycle+options&rft.au=Price%2C+R+R%3BSingh%2C+B+P%3BMacKinnon%2C+R+J%3BSevougian%2C+S+David&rft.aulast=Price&rft.aufirst=R&rft.date=2013-02-01&rft.volume=53&rft.issue=&rft.spage=205&rft.isbn=&rft.btitle=&rft.title=Energy+policy&rft.issn=03014215&rft_id=info:doi/10.1016%2Fj.enpol.2012.10.051 LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2013-06-12 N1 - Last updated - 2013-09-16 N1 - SubjectsTermNotLitGenreText - 3321 971 6071 1542 11325; 4261 5574 10472; 10904 10902; 8762 5336 4246; 12434; 9390; 8759 4246; 433 293 14 DO - http://dx.doi.org/10.1016/j.enpol.2012.10.051 ER - TY - JOUR T1 - Contributions of Garrison Sposito to clay science AN - 1832680309; 768086-67 JF - Program and Abstracts - Annual Meeting of the Clay Minerals Society AU - Greathouse, Jeffrey A AU - ? Y1 - 2013 PY - 2013 DA - 2013 SP - 82 PB - Clay Minerals Society, Aurora, CO VL - 50 SN - 1550-2244, 1550-2244 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832680309?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.atitle=Contributions+of+Garrison+Sposito+to+clay+science&rft.au=Greathouse%2C+Jeffrey+A%3B%3F&rft.aulast=Greathouse&rft.aufirst=Jeffrey&rft.date=2013-01-01&rft.volume=50&rft.issue=&rft.spage=82&rft.isbn=&rft.btitle=&rft.title=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.issn=15502244&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Annual meeting of the Clay Minerals Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - CO N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Heterogeneous nucleation of methane hydrates in the presence of clay mineral surfaces AN - 1832675064; 768087-100 JF - Program and Abstracts - Annual Meeting of the Clay Minerals Society AU - Teich-McGoldrick, Stephanie L AU - Beckham, Gregg T AU - Greathouse, Jeffery A AU - Cygan, Randall T Y1 - 2013 PY - 2013 DA - 2013 SP - 236 PB - Clay Minerals Society, Aurora, CO VL - 50 SN - 1550-2244, 1550-2244 KW - silicates KW - methane KW - gas hydrates KW - clay mineralogy KW - aliphatic hydrocarbons KW - crystal structure KW - alkanes KW - clathrates KW - clay minerals KW - organic compounds KW - nucleation KW - heterogeneous materials KW - hydrocarbons KW - sheet silicates KW - molecular dynamics KW - crystal chemistry KW - geochemistry KW - mineral surface KW - 01A:General mineralogy KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832675064?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.atitle=Heterogeneous+nucleation+of+methane+hydrates+in+the+presence+of+clay+mineral+surfaces&rft.au=Teich-McGoldrick%2C+Stephanie+L%3BBeckham%2C+Gregg+T%3BGreathouse%2C+Jeffery+A%3BCygan%2C+Randall+T&rft.aulast=Teich-McGoldrick&rft.aufirst=Stephanie&rft.date=2013-01-01&rft.volume=50&rft.issue=&rft.spage=236&rft.isbn=&rft.btitle=&rft.title=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.issn=15502244&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; clathrates; clay mineralogy; clay minerals; crystal chemistry; crystal structure; gas hydrates; geochemistry; heterogeneous materials; hydrocarbons; methane; mineral surface; molecular dynamics; nucleation; organic compounds; sheet silicates; silicates ER - TY - JOUR T1 - Molecular simulation of clay hydration; structure and thermodynamics as a function of temperature and pressure AN - 1832675032; 768086-68 JF - Program and Abstracts - Annual Meeting of the Clay Minerals Society AU - Greathouse, Jeffrey A AU - Teich-McGoldrick, Stephanie L AU - Colon, Carlos F Jove AU - Cygan, Randall T AU - ? Y1 - 2013 PY - 2013 DA - 2013 SP - 83 PB - Clay Minerals Society, Aurora, CO VL - 50 SN - 1550-2244, 1550-2244 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832675032?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.atitle=Molecular+simulation+of+clay+hydration%3B+structure+and+thermodynamics+as+a+function+of+temperature+and+pressure&rft.au=Greathouse%2C+Jeffrey+A%3BTeich-McGoldrick%2C+Stephanie+L%3BColon%2C+Carlos+F+Jove%3BCygan%2C+Randall+T%3B%3F&rft.aulast=Greathouse&rft.aufirst=Jeffrey&rft.date=2013-01-01&rft.volume=50&rft.issue=&rft.spage=83&rft.isbn=&rft.btitle=&rft.title=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.issn=15502244&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Annual meeting of the Clay Minerals Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - CO N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Molecular models of carbon dioxide intercalation in montmorillonite AN - 1832674715; 768086-34 JF - Program and Abstracts - Annual Meeting of the Clay Minerals Society AU - Cygan, Randall T AU - Myshakin, Evgeniy M AU - Romanov, Vyacheslav N AU - Saidi, Wissam A AU - Jordan, Kenneth D AU - ? Y1 - 2013 PY - 2013 DA - 2013 SP - 40 PB - Clay Minerals Society, Aurora, CO VL - 50 SN - 1550-2244, 1550-2244 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832674715?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.atitle=Molecular+models+of+carbon+dioxide+intercalation+in+montmorillonite&rft.au=Cygan%2C+Randall+T%3BMyshakin%2C+Evgeniy+M%3BRomanov%2C+Vyacheslav+N%3BSaidi%2C+Wissam+A%3BJordan%2C+Kenneth+D%3B%3F&rft.aulast=Cygan&rft.aufirst=Randall&rft.date=2013-01-01&rft.volume=50&rft.issue=&rft.spage=40&rft.isbn=&rft.btitle=&rft.title=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.issn=15502244&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Annual meeting of the Clay Minerals Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - CO N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Enrichment of stable cesium and rubidium in Savannah River site soils AN - 1549617577; 2014-059917 AB - The mineralogy, soil texture, and chemical enrichment of elements (Cs, Rb, K, Ba, and Sr) are examined in three uncontaminated (radionuclide-free) soils cores from the Savannah River Site (SRS), SC. The SRS is the focus of an extensive remediation project by the US Department of Energy; due the production and storage of (super 137) Cs and other radionuclides at this facility. Documenting the mobility of (super 137) Cs and its sorption by geologic materials is important to predict long-term behavior of (super 137) Cs migrating from the SRS and other contaminated sites. Unique depth profiles of (1) mineral composition, (2) soil texture, and (3) acid-extractable alkalis were collected. Mineralogical characterization of the soils suggests that each core represents a different stage of weathering progression. These data enable a test of our hypotheses that (1) Cs has been favorably enriched wrt K in the soils as a result of long-term weathering, (2) this Cs will affect the ability of soils at the SRS to adsorb (super 137) Cs and, (3) interlayer wedge zones in weathered mica particles, now mostly hydroxy-interlayered vermiculite (HIV), may be responsible for selective uptake of Cs and Rb from soil solution and for their fixation. Clay (10% clay. Stable Cs is significantly enriched with respect to K in all three soil cores. K is increasingly removed as weathering progresses, and Cs and Rb are preferentially retained. The Cs/K and Rb/K ratio of acid-leachates are interpreted to show that SRS soils have sorbed and retained Cs and Rb in non-exchangeable sites in clay minerals during pedogenesis. Preliminary molecular modeling results support the hypothesis that Cs is the sterically most favored ion in the interlayer wedge zone of HIV. These preliminary results suggest that Cs can be sorbed effectively at the wedge-apex sites of HIV by electrostatic attraction. JF - Abstracts with Programs - Geological Society of America AU - Zaunbrecher, Laura K AU - Elliott, W Crawford AU - Perdrial, Nicolas AU - Wampler, J Marion AU - Cygan, Randall T AU - Kaplan, Daniel I AU - Teich-McGoldrick, Stephanie AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 769 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617577?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Enrichment+of+stable+cesium+and+rubidium+in+Savannah+River+site+soils&rft.au=Zaunbrecher%2C+Laura+K%3BElliott%2C+W+Crawford%3BPerdrial%2C+Nicolas%3BWampler%2C+J+Marion%3BCygan%2C+Randall+T%3BKaplan%2C+Daniel+I%3BTeich-McGoldrick%2C+Stephanie%3BAnonymous&rft.aulast=Zaunbrecher&rft.aufirst=Laura&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=769&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper233925.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-31 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Failure of caprock seals; mechanical stratigraphy, stress history and tensile failure analysis of exhumed analogs AN - 1549617258; 2014-057519 AB - The varied sedimentologic and tectonic histories of terrigenous caprock seals and their inherent mechanical properties control the distribution and morphology of permeable fractures within these lithologic units. The migration of fluids or gas through mm- to cm-scale discontinuity networks comprised of bedding planes, stratigraphic interfaces, and vertical fracture networks can result in focused fluid flow which compromises seal integrity. We examine four failed caprock seals, Paleozoic and Mesozoic analog formations in Utah that exhibit evidence for subsurface fluid flow via permeable fracture networks, as evidenced by mineralized extension and shear fractures. We identify features in outcrop that suggest failure due to extensional-shear and hydraulic extension and subsequent fluid flow. Tensile rock strength, derived from indirect tensile strength tests range from 2.3 MPa in siltstone to 11.5 MPa in calcareous shale, and are lithology dependent. Burial history models suggest that the caprock seal analogs reached a maximum burial depth greater than 1.6 km and experienced an overburden stress of up to 70 MPa. Analysis of the evolution of the pore-fluid factor, lambda , through time shows changes in expected failure mode of extensional shear or hydraulic extension, and the failure type depends on a combination of mechanical rock properties and differential stress at different points in the burial history. With increasing lithostatic load, lambda decreases for all intact rock scenarios, however differences in mechanical properties due to lithology can inhibit formation of extensional shear failure by increased pore fluid pressure alone. When these datasets are combined with simple three-dimensional finite element modeling, we can predict how the fine-scale mechanical stratigraphy of the seal influences the potential for failure due to localized strain accumulation at mechanical boundaries. JF - Abstracts with Programs - Geological Society of America AU - Petrie, Elizabeth S AU - Evans, James P AU - Bauer, Stephen AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 448 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617258?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Failure+of+caprock+seals%3B+mechanical+stratigraphy%2C+stress+history+and+tensile+failure+analysis+of+exhumed+analogs&rft.au=Petrie%2C+Elizabeth+S%3BEvans%2C+James+P%3BBauer%2C+Stephen%3BAnonymous&rft.aulast=Petrie&rft.aufirst=Elizabeth&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=448&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper228761.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-31 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Illite surface chemistry and shale oil reservoirs AN - 1542647610; 2014-048406 AB - Illite clay is a large component of unconventional shale reservoirs such as the Eagle Ford, Bakken, Marcellus Shale, Utica Shale, and Rhine Street Shale. Because of illite's high surface area, illite-oil adhesion is a potential control over oil production. Here we develop a surface complexation model of illite-oil interaction and use it to consider the impact of frack water, flowback, and connate water chemistry on potential oil adhesion mechanisms. Key model inputs are illite edge vs. basal plane exposure, illite surface complexation constants, ambient water chemistry and oil acid and base numbers. The model also accounts for the impacts of secondary mineral equilibria (e.g. calcite) and variable salinity on illite and oil surface charge and electrostatic attraction. Key uncertainties are the surface acidity of shale oils and the reversibility of adhesion mechanisms. JF - Abstracts with Programs - Geological Society of America AU - Bihl, Jeremiah I AU - Brady, Patrick V AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 106 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542647610?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Illite+surface+chemistry+and+shale+oil+reservoirs&rft.au=Bihl%2C+Jeremiah+I%3BBrady%2C+Patrick+V%3BAnonymous&rft.aulast=Bihl&rft.aufirst=Jeremiah&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=106&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper228871.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-04 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Potential seal bypass features produced by deformation-band fault to opening-mode fracture transition at the reservoir-caprock interface AN - 1542645946; 2014-048408 AB - The reservoir-caprock interface is often considered a no-flow boundary in reservoir models; however, when deformation features are present at the interface, reservoir fluids can potentially use these features as pathways to travel into and through the caprock. We identify a number of structural and diagenetic features potentially capable of influencing CO (sub 2) and hydrocarbon transmission in eolian-mudstone systems. We focus on the most common of these interface features: zones of deformation bands in reservoir lithologies that transition to opening-mode fractures in caprock lithologies. The sedimentology, diagenesis, and petrophysical properties of interface sites were described in detail to infer the history of fluid flow across the interfaces and allow numerical single- and multi-phase flow modeling. The presence of pyrite within the fractures, bleached fracture margins, and the presence of hydrocarbon inclusions within fracture-filling calcite demonstrate that strongly reducing, hydrocarbon-bearing fluids at least partially penetrated the caprocks. The permeability and pore-size distribution of the deformation bands within the reservoir lithologies indicate that they are capable of greatly impeding flow of supercritical CO (sub 2) . The deformation band faults have 2 to 4 orders of magnitude lower permeability than the host sandstones. Mercury porosimetry indicates that they are capable of forming a capillary seal--supporting up to a 3-m column of CO (sub 2) or hydrocarbons for the case of subhorizonatal bands. Single-phase FEMOC (finite element method of characteristics) modeling demonstrates that the fracture systems can transmit significant volumes of fluids, particularly when the fracture network in the caprock is associated with a deformation-band fault zone in the reservoir lithology. Such flow into the caprock is enhanced by initial pressure buildup in the sandstone due to the low permeability deformation band. We are investigating the potential impact of such features on the integrity of carbon sequestration sites. JF - Abstracts with Programs - Geological Society of America AU - Raduha, Stefan AU - Butler, David AU - Mozley, Peter S AU - Person, Mark AU - Evans, James P AU - Flores, Santiago AU - Heath, Jason AU - Dewers, Thomas A AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 107 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542645946?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Potential+seal+bypass+features+produced+by+deformation-band+fault+to+opening-mode+fracture+transition+at+the+reservoir-caprock+interface&rft.au=Raduha%2C+Stefan%3BButler%2C+David%3BMozley%2C+Peter+S%3BPerson%2C+Mark%3BEvans%2C+James+P%3BFlores%2C+Santiago%3BHeath%2C+Jason%3BDewers%2C+Thomas+A%3BAnonymous&rft.aulast=Raduha&rft.aufirst=Stefan&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=107&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper231140.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-04 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Sans investigation of pore structure in natural and engineered materials for nuclear waste repository systems AN - 1542645095; 2014-050998 AB - The pore characteristics and fluid transport behavior from the nano- to micrometer scale of natural and engineered materials at field conditions provide fundamental insights into their performance efficiency in regulating radionuclide transport in nuclear waste repositories. Small-angle neutron scattering (SANS) is the canonical technique to be used when probing the pore structure of condensed matters in the 1 to 1000 nm range. In this study, we have characterized the pore features of representative natural and engineered materials for nuclear waste repository systems including clays, rock salt, and clay-cement using SANS, and their evolution over the relevant ranges of humidity, temperature, and pressure, composition, and length scale. Our results demonstrate that each material shows unique pore features. The effects that impact on pore features include sample form and sample environment including humidity, temperature, and pressure. Analysis of the SANS data indicates significant alteration of clays on water diffusion and absorption behavior. These results suggest that SANS is particularly suited for in-situ studies of pore-scale characteristics of low-permeability media and the factors that impact their pore features. As emergent property, nano- to micro-scale structural characterization is crucial in providing insights into pore-scale processes, which are pertinent to upscale continuum model development for field applications. JF - Abstracts with Programs - Geological Society of America AU - Ding, Mei AU - Hartl, Monika A AU - Xu, Hongwu AU - Hjelm, Rex AU - Wang, Yifeng AU - Jove-Colon, Carlos AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 488 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542645095?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Sans+investigation+of+pore+structure+in+natural+and+engineered+materials+for+nuclear+waste+repository+systems&rft.au=Ding%2C+Mei%3BHartl%2C+Monika+A%3BXu%2C+Hongwu%3BHjelm%2C+Rex%3BWang%2C+Yifeng%3BJove-Colon%2C+Carlos%3BAnonymous&rft.aulast=Ding&rft.aufirst=Mei&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=488&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper232378.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-04 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - The Chelyabinsk airburst; observations and models AN - 1529794574; 2014-036405 AB - On Feb. 15, 2013, an asteroid exploded about 40 km SSW of the Russian city of Chelyabinsk. Its proximity led to many injuries and widespread blast damage, but also yielded a plethora of data from security and dashboard cameras. Combined with seismic, infrasound, and satellite records, this provides a rich and multi-faceted means to determine the projectile size and entry parameters, and develop a self-consistent model. We will present results of the first physics simulations to be initialized with accurate energy deposition derived from observations. The best estimate of the explosive yield is 400-500 kilotons, making Chelyabinsk the most powerful such event observed since Tunguska (3-5 megatons). Analysis of video combined with subsequent on-site stellar calibrations enable precise estimates of entry velocity (19 km/s), angle (17 degrees elevation) and altitude of peak brightness (29 km). This implies a pre-entry diameter of approximately 20 m and mass of approximately 1200 tonnes. Satellite sensors recorded the emission peak at 03:20:33 UT, with a total radiated energy of 3.75X10 (super 14) J ( approximately 90 kilotons). A typical bolide luminous efficiency of 20% implies a total energy of approximately 450 kilotons, consistent with infrasound and other observations. The maximum radiant intensity was 2.7X10 (super 13) W/ster, corresponding to a magnitude of -28. The shallow entry angle led to a long bolide duration (16.5 s) and energy was deposited over hundreds of km leading to an extended, near-horizontal, linear explosion. The blast was distributed over a large area, and was much weaker than for a steep entry and a more concentrated explosion closer to the surface. The orientation also led to different phenomena than expected for a more vertical entry. There was no ballistic plume as observed from SL9 impacts (45 degrees ) or calculated for Tunguska ( approximately 35 degrees ). Instead, buoyant instabilities grew into mushroom clouds and bifurcated the trail into two contra-rotating vortices. Chelyabinsk and Tunguska are "once-per-century" and "once-per-millennium" events, respectively. These outliers imply that the frequency of large airbursts is underestimated. Models also suggest that they are more damaging than nuclear explosions of the same yield (traditionally used to estimate impact risk). The risk from airbursts is therefore greater than previously thought. JF - Abstracts with Programs - Geological Society of America AU - Boslough, Mark B AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 543 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529794574?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=The+Chelyabinsk+airburst%3B+observations+and+models&rft.au=Boslough%2C+Mark+B%3BAnonymous&rft.aulast=Boslough&rft.aufirst=Mark&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=543&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper232635.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-05-29 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Cometary coma collisions on the Moon AN - 1469625299; 2013-097649 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Bruck, Syal M AU - Schultz, P H AU - Crawford, D A AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 2569 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - water KW - lunar swirls KW - cratering KW - pressure KW - numerical models KW - Moon KW - atmosphere KW - water vapor KW - impacts KW - simulation KW - comae KW - temperature KW - comets KW - dynamics KW - heating KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469625299?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Cometary+coma+collisions+on+the+Moon&rft.au=Bruck%2C+Syal+M%3BSchultz%2C+P+H%3BCrawford%2C+D+A%3BAnonymous&rft.aulast=Bruck&rft.aufirst=Syal&rft.date=2013-01-01&rft.volume=44&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2013/pdf/2569.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 15 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Aug. 7, 2013 N1 - Last updated - 2013-12-20 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - atmosphere; comae; comets; cratering; dynamics; heating; impacts; lunar swirls; Moon; numerical models; pressure; regolith; simulation; temperature; water; water vapor ER - TY - JOUR T1 - Verification of impact melt and vapor determination methods in CTH AN - 1469621631; 2013-097644 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Quintana, S N AU - Crawford, D A AU - Schultz, P H AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 1733 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - cratering KW - pressure KW - numerical models KW - impact features KW - strength KW - one-dimensional models KW - entropy KW - CTH computer program KW - melts KW - two-dimensional models KW - temperature KW - computer programs KW - volatilization KW - impact melts KW - gravity field KW - planetology KW - hydrodynamics KW - impact craters KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469621631?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Verification+of+impact+melt+and+vapor+determination+methods+in+CTH&rft.au=Quintana%2C+S+N%3BCrawford%2C+D+A%3BSchultz%2C+P+H%3BAnonymous&rft.aulast=Quintana&rft.aufirst=S&rft.date=2013-01-01&rft.volume=44&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2013/pdf/1733.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 7 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on July 25, 2013 N1 - Last updated - 2013-12-20 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - computer programs; cratering; CTH computer program; entropy; gravity field; hydrodynamics; impact craters; impact features; impact melts; melts; numerical models; one-dimensional models; planetology; pressure; strength; temperature; two-dimensional models; volatilization ER - TY - JOUR T1 - RNA-Seq analysis and targeted mutagenesis for improved free fatty acid production in an engineered cyanobacterium AN - 1434030378; 18551627 AB - Background: High-energy-density biofuels are typically derived from the fatty acid pathway, thus establishing free fatty acids (FFAs) as important fuel precursors. FFA production using photosynthetic microorganisms like cyanobacteria allows for direct conversion of carbon dioxide into fuel precursors. Recent studies investigating cyanobacterial FFA production have demonstrated the potential of this process, yet FFA production was also shown to have negative physiological effects on the cyanobacterial host, ultimately limiting high yields of FFAs. Results: Cyanobacterial FFA production was shown to generate reactive oxygen species (ROS) and lead to increased cell membrane permeability. To identify genetic targets that may mitigate these toxic effects, RNA-seq analysis was used to investigate the host response of Synechococcus elongatus PCC 7942. Stress response, nitrogen metabolism, photosynthesis, and protein folding genes were up-regulated during FFA production while genes involved in carbon and hydrogen metabolisms were down-regulated. Select genes were targeted for mutagenesis to confirm their role in mitigating FFA toxicity. Gene knockout of two porins and the overexpression of ROS-degrading proteins and hypothetical proteins reduced the toxic effects of FFA production, allowing for improved growth, physiology, and FFA yields. Comparative transcriptomics, analyzing gene expression changes associated with FFA production and other stress conditions, identified additional key genes involved in cyanobacterial stress response. Conclusions: A total of 15 gene targets were identified to reduce the toxic effects of FFA production. While single-gene targeted mutagenesis led to minor increases in FFA production, the combination of these targeted mutations may yield additional improvement, advancing the development of high-energy-density fuels derived from cyanobacteria. JF - Biotechnology for Biofuels AU - Ruffing, Anne M AD - Sandia National Laboratories, Department of Bioenergy and Defense Technologies, MS 1413, P.O. Box 5800, 87185-1413, Albuquerque, NM, USA Y1 - 2013 PY - 2013 DA - 2013 SP - 113 PB - BioMed Central Ltd., Floor 6 London WC1X 8HL United Kingdom VL - 6 IS - 1 SN - 1754-6834, 1754-6834 KW - Toxicology Abstracts; Biochemistry Abstracts 2: Nucleic Acids; Microbiology Abstracts C: Algology, Mycology & Protozoology; Biotechnology and Bioengineering Abstracts KW - Free fatty acid biosynthesis, FFA biosynthesis, Cyanobacterial biofuels, Algal biofuels, Cyanobacteria, Free fatty acid, RNA-seq KW - FFA toxicity KW - Photosynthesis KW - Porins KW - Fuels KW - Synechococcus elongatus KW - Stress KW - Membrane permeability KW - Hydrogen KW - Toxicity KW - Mutagenesis KW - Cyanobacteria KW - Cell membranes KW - Carbon KW - Protein folding KW - Reactive oxygen species KW - Fatty acids KW - Microorganisms KW - targeted mutagenesis KW - Protein turnover KW - Carbon dioxide KW - Mutation KW - Biofuels KW - Nitrogen KW - W 30905:Medical Applications KW - N 14845:Miscellaneous KW - K 03310:Genetics & Taxonomy KW - X 24300:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434030378?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biotechnology+for+Biofuels&rft.atitle=RNA-Seq+analysis+and+targeted+mutagenesis+for+improved+free+fatty+acid+production+in+an+engineered+cyanobacterium&rft.au=Ruffing%2C+Anne+M&rft.aulast=Ruffing&rft.aufirst=Anne&rft.date=2013-01-01&rft.volume=6&rft.issue=1&rft.spage=113&rft.isbn=&rft.btitle=&rft.title=Biotechnology+for+Biofuels&rft.issn=17546834&rft_id=info:doi/10.1186%2F1754-6834-6-113 L2 - http://www.biotechnologyforbiofuels.com/content/6/1/113 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 43 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Photosynthesis; Fuels; Porins; Membrane permeability; Stress; Toxicity; Hydrogen; Mutagenesis; Carbon; Cell membranes; Reactive oxygen species; Protein folding; Microorganisms; Fatty acids; Protein turnover; targeted mutagenesis; Carbon dioxide; Mutation; Biofuels; Nitrogen; Cyanobacteria; Synechococcus elongatus DO - http://dx.doi.org/10.1186/1754-6834-6-113 ER - TY - JOUR T1 - Parameter estimation and predictive uncertainty in stochastic inverse modeling of groundwater flow; comparing null-space Monte Carlo and multiple starting point methods AN - 1434008392; 2013-072280 AB - Given a highly parameterized groundwater model in which the conceptual model of the heterogeneity is stochastic, a set of inverse calibrations from multiple starting points (MSPs) provide an ensemble of calibrated parameters and follow-on transport predictions. However, the multiple calibrations are computationally expensive. A recently developed null-space Monte Carlo (NSMC) method combines the calibration solution-space parameters with the ensemble of null-space parameters, creating sets of calibration-constrained parameters for input to follow-on transport predictions. The consistency between probabilistic ensembles of parameter estimates and predictions created using the MSP calibration and the NSMC approaches is examined using a highly parameterized (>1300 parameters) model of the Culebra dolomite previously developed for the Waste Isolation Pilot Plant project in New Mexico as a test case. A total of 100 estimated fields are retained from the MSP approach, and the ensemble of results defining the model fit to the data and prediction of an advective travel time are compared with the same results obtained using NSMC. We demonstrate that the NSMC fields based on a single calibrated model can be significantly constrained by the calibrated solution space, and the resulting distribution of advective travel times is biased toward the travel time from the single calibrated field. To overcome this, newly proposed strategies to employ a multiple calibration-constrained NSMC (M-NSMC) approach are evaluated. Comparison of the M-NSMC and MSP methods demonstrates that M-NSMC can provide a computationally efficient and practical solution for predictive uncertainty analysis in highly nonlinear and complex subsurface flow and transport models. Abstract Copyright (2013), American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Yoon, Hongkyu AU - Hart, David B AU - McKenna, Sean A Y1 - 2013/01// PY - 2013 DA - January 2013 SP - 536 EP - 553 PB - American Geophysical Union, Washington, DC VL - 49 IS - 1 SN - 0043-1397, 0043-1397 KW - United States KW - null-space Monte Carlo method KW - numerical models KW - Eddy County New Mexico KW - Paleozoic KW - Monte Carlo analysis KW - statistical analysis KW - waste disposal sites KW - prediction KW - New Mexico KW - preferential flow KW - Permian KW - radioactive waste KW - ground water KW - stochastic processes KW - quantitative analysis KW - Waste Isolation Pilot Plant KW - waste disposal KW - Culebra Dolomite Member KW - underground disposal KW - uncertainty KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434008392?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Parameter+estimation+and+predictive+uncertainty+in+stochastic+inverse+modeling+of+groundwater+flow%3B+comparing+null-space+Monte+Carlo+and+multiple+starting+point+methods&rft.au=Yoon%2C+Hongkyu%3BHart%2C+David+B%3BMcKenna%2C+Sean+A&rft.aulast=Yoon&rft.aufirst=Hongkyu&rft.date=2013-01-01&rft.volume=49&rft.issue=1&rft.spage=536&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2Fwrcr.20064 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2013-01-01 N1 - Number of references - 88 N1 - PubXState - DC N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2013-09-20 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - Culebra Dolomite Member; Eddy County New Mexico; ground water; Monte Carlo analysis; New Mexico; null-space Monte Carlo method; numerical models; Paleozoic; Permian; prediction; preferential flow; quantitative analysis; radioactive waste; statistical analysis; stochastic processes; uncertainty; underground disposal; United States; waste disposal; waste disposal sites; Waste Isolation Pilot Plant DO - http://dx.doi.org/10.1002/wrcr.20064 ER - TY - JOUR T1 - Subsurface shear failure in spherical bodies; a possible formation mechanism for the surface trough on 4 Vesta AN - 1400620777; 2013-057263 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Stickle, Angela M AU - Schultz, P H AU - Crawford, D A AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract No. 2417 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - failures KW - experimental studies KW - shock waves KW - numerical models KW - asteroids KW - Vesta Asteroid KW - shear stress KW - damage KW - tensile strength KW - stress fields KW - impacts KW - fracturing KW - simulation KW - Dawn Mission KW - troughs KW - laboratory studies KW - hypervelocity impacts KW - oblique orientation KW - shear KW - faults KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1400620777?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Subsurface+shear+failure+in+spherical+bodies%3B+a+possible+formation+mechanism+for+the+surface+trough+on+4+Vesta&rft.au=Stickle%2C+Angela+M%3BSchultz%2C+P+H%3BCrawford%2C+D+A%3BAnonymous&rft.aulast=Stickle&rft.aufirst=Angela&rft.date=2013-01-01&rft.volume=44&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2013/pdf/2417.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 12 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 6, 2013 N1 - Last updated - 2013-07-18 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - asteroids; damage; Dawn Mission; experimental studies; failures; faults; fracturing; hypervelocity impacts; impacts; laboratory studies; numerical models; oblique orientation; shear; shear stress; shock waves; simulation; stress fields; tensile strength; troughs; Vesta Asteroid ER - TY - JOUR T1 - Lunar-forming impacts; high-resolution SPH and AMR-CTH simulations AN - 1320158208; 2013-030568 AB - We present results of the highest-resolution simulations to date of potential Moon-forming impacts using a Lagrangian, particle-based method (smooth particle hydrodynamics, or SPH) and an Eulerian, grid-based method with adaptive mesh refinement (AMR-CTH). We consider a few candidate impacts advocated by recent works, directly comparing simulations performed at varying resolutions and with both numerical methods and their predictions for the properties of resulting protolunar disks. For a fixed set of impact conditions, simulations with either method and with different resolutions yield very similar results for the initial impact and the first few hours of the post-impact period. The subsequent disk properties in the approximately 5-20 h time period can vary substantially from case-to-case, depending on the orbits of and mutual interactions between large bound clumps of ejecta that often form after the initial impact. After such clumps have completed at least one orbit (which typically requires approximately 25-50 h), the predicted protolunar disk mass and its angular momentum converge to within about 10% for simulations of very similar impact conditions using different resolutions or methods. The disks produced by the CTH simulations are consistently about 10% less massive than those produced by SPH simulations, due presumably to inherent differences between the codes. The two methods predict broadly similar values for the fraction of the protolunar disk that originates from the target vs. the impactor, and for the initial disk radial surface density and temperature profiles. JF - Icarus AU - Canup, R M AU - Barr, A C AU - Crawford, D A Y1 - 2013/01// PY - 2013 DA - January 2013 SP - 200 EP - 219 PB - Elsevier, New York, NY VL - 222 IS - 1 SN - 0019-1035, 0019-1035 KW - Lagrangian analysis KW - angular momentum KW - numerical models KW - Moon KW - orbits KW - numerical analysis KW - Eulerian KW - impacts KW - simulation KW - Earth-Moon couple KW - hydrodynamics KW - protolunar disk KW - giant impact theory KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1320158208?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Icarus&rft.atitle=Lunar-forming+impacts%3B+high-resolution+SPH+and+AMR-CTH+simulations&rft.au=Canup%2C+R+M%3BBarr%2C+A+C%3BCrawford%2C+D+A&rft.aulast=Canup&rft.aufirst=R&rft.date=2013-01-01&rft.volume=222&rft.issue=1&rft.spage=200&rft.isbn=&rft.btitle=&rft.title=Icarus&rft.issn=00191035&rft_id=info:doi/10.1016%2Fj.icarus.2012.10.011 L2 - http://www.sciencedirect.com/science/journal/00191035 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 54 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-07-18 N1 - CODEN - ICRSA5 N1 - SubjectsTermNotLitGenreText - angular momentum; Earth-Moon couple; Eulerian; giant impact theory; hydrodynamics; impacts; Lagrangian analysis; Moon; numerical analysis; numerical models; orbits; protolunar disk; simulation DO - http://dx.doi.org/10.1016/j.icarus.2012.10.011 ER - TY - JOUR T1 - A thermodynamic model for silica and aluminum in alkaline solutions with high ionic strength at elevated temperatures up to 100 degrees C; applications to zeolites AN - 1270038565; 2013-010957 AB - In this study, a thermodynamic model for silica and aluminum in high ionic strength solutions at elevated temperatures up to 100 degrees C is constructed. Pitzer equations are utilized for the thermodynamic model construction. This model is valid up to ionic strengths of approximately 24 molal (m) in NaOH solutions with silicate concentrations up to approximately 1.5 m. The speciation of silica (including monomers and polymers) and aluminum at elevated temperatures is taken into account. Also, the equilibrium constants for silicic acid and its polymer species (H (sub 4) SiO (sub 4) , H (sub 5) Si (sub 2) O (sub 7) (super -) , H (sub 4) Si (sub 2) O (sub 7) (super 2-) , and H (sub 5) Si (sub 3) O (sub 7) (super 3-) ) at elevated temperatures up to 100 degrees C, are obtained based on theoretical calculations. Using this thermodynamic model, thermodynamic properties, including equilibrium constants, and respective reaction enthalpies are obtained for sodium silicates, zeolite A, and the amorphous form of zeolite A, based on solubility experiments at elevated temperatures. The equilibrium constants for zeolite A and amorphous precursor of zeolite A regarding the following reactions up to 100 degrees C, NaAlSiO (sub 4) . 2.25H (sub 2) O(cr)+4H (super +) =Na (super +) +Al (super 3+) +H (sub 4) SiO (sub 4) (aq) + 2.25H (sub 2) O(L) (1) and NaAlSiO (sub 4) . 2.25H (sub 2) O(am)+4H (super +) =Na (super +) Al (super 3+) +H (sub 4) SiO (sub 4) (aq) + 2.25H (sub 2) O(l) (2) can be expressed as follows logK (sub 1) =7963+ or -327/T-16.46+ or -0.96 (3) and logK (sub 2) =12971+ or -160/T-30.80+ or -0.50 (4) where T is temperature in Kelvin. The enthalpy of formation from elements, Gibbs free energy of formation from elements, and standard entropy derived for zeolite A and the amorphous form of zeolite A with the chemical formulas mentioned above at 25 degrees C and 1 bar are -2738+ or -5 kJ/mol, -2541+ or -2 kJ/mol, 373+ or -10 J/(K.mol); and -2642+ or -3 kJ/mol, -2527+ or -2 kJ/mol, and 648+ or -10 J/(K.mol), respectively. The enthalpy of formation from elements for zeolite A derived in this study based on solubility experiments in hydrothermal solutions agrees well with those obtained by calorimetric measurements and by theoretical calculations. JF - American Mineralogist AU - Xiong, Yongliang Y1 - 2013/01// PY - 2013 DA - January 2013 SP - 141 EP - 153 PB - Mineralogical Society of America, Washington, DC VL - 98 IS - 1 SN - 0003-004X, 0003-004X KW - silicates KW - solutions KW - free energy KW - silicon KW - ions KW - temperature KW - alkalic composition KW - enthalpy KW - Pitzer equations KW - silica KW - metals KW - aluminum KW - zeolite group KW - theoretical models KW - framework silicates KW - applications KW - thermodynamic properties KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270038565?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Mineralogist&rft.atitle=A+thermodynamic+model+for+silica+and+aluminum+in+alkaline+solutions+with+high+ionic+strength+at+elevated+temperatures+up+to+100+degrees+C%3B+applications+to+zeolites&rft.au=Xiong%2C+Yongliang&rft.aulast=Xiong&rft.aufirst=Yongliang&rft.date=2013-01-01&rft.volume=98&rft.issue=1&rft.spage=141&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam.2013.4089 L2 - http://ammin.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 60 N1 - PubXState - DC N1 - Document feature - illus. incl. 6 tables N1 - Last updated - 2013-01-17 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - alkalic composition; aluminum; applications; enthalpy; framework silicates; free energy; ions; metals; Pitzer equations; silica; silicates; silicon; solutions; temperature; theoretical models; thermodynamic properties; zeolite group DO - http://dx.doi.org/10.2138/am.2013.4089 ER - TY - CPAPER T1 - Frameworks for Assessing the Quality of Modeling and Simulation Capabilities T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313123984; 6194892 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Rider, William Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Simulation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313123984?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Frameworks+for+Assessing+the+Quality+of+Modeling+and+Simulation+Capabilities&rft.au=Rider%2C+William&rft.aulast=Rider&rft.aufirst=William&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Nanogeochemistry: Size-dependent mineral-fluid interface chemistry T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313117794; 6181145 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Wang, Yifeng Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313117794?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Nanogeochemistry%3A+Size-dependent+mineral-fluid+interface+chemistry&rft.au=Wang%2C+Yifeng&rft.aulast=Wang&rft.aufirst=Yifeng&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Experimental Evaluation of Water Films on Mineral Surfaces in Hydrous Supercritical CO2 T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313117498; 6191526 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Bryan, Charles AU - Matteo, Edward AU - Dewers, Thomas AU - Heath, Jason AU - Wang, Yifeng Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Minerals KW - Carbon dioxide KW - Films UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313117498?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Experimental+Evaluation+of+Water+Films+on+Mineral+Surfaces+in+Hydrous+Supercritical+CO2&rft.au=Bryan%2C+Charles%3BMatteo%2C+Edward%3BDewers%2C+Thomas%3BHeath%2C+Jason%3BWang%2C+Yifeng&rft.aulast=Bryan&rft.aufirst=Charles&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Modeling fluid flow in deformation bands with stabilized localization mixed finite elements T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313116793; 6191178 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Sun, Waiching AU - Ostien, Jakob AU - Foulk, James AU - Abdeljawad, Fadi Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Deformation KW - Fluid flow UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313116793?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Modeling+fluid+flow+in+deformation+bands+with+stabilized+localization+mixed+finite+elements&rft.au=Sun%2C+Waiching%3BOstien%2C+Jakob%3BFoulk%2C+James%3BAbdeljawad%2C+Fadi&rft.aulast=Sun&rft.aufirst=Waiching&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Coupled Flow and Mechanics in Porous and Fractured Media T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313116711; 6191172 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Martinez, Mario AU - Newell, Pania AU - Bishop, Joseph Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Fractures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313116711?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Coupled+Flow+and+Mechanics+in+Porous+and+Fractured+Media&rft.au=Martinez%2C+Mario%3BNewell%2C+Pania%3BBishop%2C+Joseph&rft.aulast=Martinez&rft.aufirst=Mario&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Infrasound Observations from the Source Physics Experiment (Tests 1, 2, and 3) at the Nevada National Security Site T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313094763; 6191755 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Jones, Kyle AU - Arrowsmith, Stephen AU - Whitaker, Rodney Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - USA, Nevada KW - Security KW - Infrasound UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313094763?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Infrasound+Observations+from+the+Source+Physics+Experiment+%28Tests+1%2C+2%2C+and+3%29+at+the+Nevada+National+Security+Site&rft.au=Jones%2C+Kyle%3BArrowsmith%2C+Stephen%3BWhitaker%2C+Rodney&rft.aulast=Jones&rft.aufirst=Kyle&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Using the Sandia Z Machine to Probe Water at Planetary Conditions: Redefining the Properties of Water in the Ice Giants T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313092942; 6194284 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Knudson, Marcus AU - Desjarlais, Michael AU - Lemke, Raymond AU - Mattsson, Thomas AU - French, Martin AU - Nettelmann, Nadine AU - Redmer, Ronlad Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Ice KW - Probes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313092942?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Using+the+Sandia+Z+Machine+to+Probe+Water+at+Planetary+Conditions%3A+Redefining+the+Properties+of+Water+in+the+Ice+Giants&rft.au=Knudson%2C+Marcus%3BDesjarlais%2C+Michael%3BLemke%2C+Raymond%3BMattsson%2C+Thomas%3BFrench%2C+Martin%3BNettelmann%2C+Nadine%3BRedmer%2C+Ronlad&rft.aulast=Knudson&rft.aufirst=Marcus&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Characteristics of pore structures in Selma Chalk using dual FIB-SEM 3D imaging and Lattice Boltzmann Modeling T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313081580; 6179644 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Yoon, Hongkyu AU - Dewers, Thomas Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Imaging techniques KW - Chalk KW - Pores UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313081580?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Characteristics+of+pore+structures+in+Selma+Chalk+using+dual+FIB-SEM+3D+imaging+and+Lattice+Boltzmann+Modeling&rft.au=Yoon%2C+Hongkyu%3BDewers%2C+Thomas&rft.aulast=Yoon&rft.aufirst=Hongkyu&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Bayesian calibration of the Community Land Model using surrogates T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313068903; 6184538 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Ray, Jaideep AU - Sargsyan, Khachik AU - Huang, Maoyi AU - Hou, Zhangshuan Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Mathematical models KW - Bayesian analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313068903?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Bayesian+calibration+of+the+Community+Land+Model+using+surrogates&rft.au=Ray%2C+Jaideep%3BSargsyan%2C+Khachik%3BHuang%2C+Maoyi%3BHou%2C+Zhangshuan&rft.aulast=Ray&rft.aufirst=Jaideep&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Parameter estimation uncertainty: Comparing apples and apples? T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313065477; 6183910 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Hart, David AU - Yoon, Hongkyu AU - McKenna, Sean Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313065477?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Parameter+estimation+uncertainty%3A+Comparing+apples+and+apples%3F&rft.au=Hart%2C+David%3BYoon%2C+Hongkyu%3BMcKenna%2C+Sean&rft.aulast=Hart&rft.aufirst=David&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Elasto-Plastic Constitutive Behavior in Three Lithofacies of the Cambrian Mt. Simon Sandstone, Illinois Basin, USA T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313057107; 6189760 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Dewers, Thomas AU - Newell, Pania AU - Broome, Scott AU - Heath, Jason AU - Bauer, Stephen Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - USA, Illinois, Illinois Basin KW - Sandstone KW - Cambrian KW - Basins KW - Paleo studies KW - Lithofacies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313057107?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Elasto-Plastic+Constitutive+Behavior+in+Three+Lithofacies+of+the+Cambrian+Mt.+Simon+Sandstone%2C+Illinois+Basin%2C+USA&rft.au=Dewers%2C+Thomas%3BNewell%2C+Pania%3BBroome%2C+Scott%3BHeath%2C+Jason%3BBauer%2C+Stephen&rft.aulast=Dewers&rft.aufirst=Thomas&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - An Integrated Risk Approach for Assessing the Use of Ensemble Streamflow Forecasts in Hydroelectric Reservoir Operations T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313042303; 6192675 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Lowry, Thomas AU - Wigmosta, Mark AU - Barco, Janet AU - Voisin, Nathalie AU - Bier, Asmeret AU - Coleman, Andre AU - Skaggs, Richard Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Flow rates KW - Reservoirs KW - Stream flow KW - Reservoir UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313042303?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=An+Integrated+Risk+Approach+for+Assessing+the+Use+of+Ensemble+Streamflow+Forecasts+in+Hydroelectric+Reservoir+Operations&rft.au=Lowry%2C+Thomas%3BWigmosta%2C+Mark%3BBarco%2C+Janet%3BVoisin%2C+Nathalie%3BBier%2C+Asmeret%3BColeman%2C+Andre%3BSkaggs%2C+Richard&rft.aulast=Lowry&rft.aufirst=Thomas&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Bistatic radar observations of the Moon using the Arecibo Observatory & Mini-RF on LRO AN - 1668228660; 2015-027231 AB - The Mini-RF team is acquiring bi-static radar measurements that will test the hypothesis that permanently shadowed areas near the lunar poles contain water ice. These bistatic observations (where the Arecibo Observatory Planetary Radar (AO) transmits a 12.6 cm wavelength signal, which is reflected off of the lunar surface and received by the Mini-RF instrument on LRO) have produced the first lunar non beta-zero radar images ever collected. Rationale: Typically, orbital radar observations use the same antenna to both transmit and receive a signal. The angle between the transmitted and received signals (the bistatic, or beta angle) for these observations is therefore zero, and they are referred to as monostatic observations. By using the AO radar as the transmitter and Mini-RF as the receiver, we have the opportunity to collect data for the Moon with beta angles other than zero. These measurements provide a new and unique test of the water ice hypothesis for the Moon. A common science product produced using planetary radar is the Circular Polarization Ratio (CPR). CPR is the ratio of the powers of received signal in the same sense transmitted divided by the opposite sense. Typical dry lunar surface has a CPR value less than unity. Higher CPR signals can result from multiple-bounce backscatter from rocky surfaces or from the combined volume scattering and coherent backscatter opposition effects (CBOE) from an ice/regolith mixture. The physics of radar scattering predict that high CPR caused by a rocky surface will be relatively insensitive to the beta angle, whilst high CPR caused by ice will be very sensitive to beta, with elevated CPR values dropping off abruptly at beta angles greater than about 1-2 degrees . Mini-RF monostatic data shows many craters with high CPR values. Most of these features are associated with fresh, young craters and display elevated CPR both inside and outside their rims. Some permanently shadowed craters near both poles show elevated CPR inside the crater rims but low CPR outside the crater rim. This has been interpreted as being consistent with RF backscatter caused by surface roughness in the former case and water ice in the latter. We are imaging both po-lar, and non-polar targets that have high monostatic CPR values. By acquiring non beta zero data of equatorial high-CPR regions (which we can safely assume have high CPR due to the presence of surface rocks) we can confirm the hypothesis that high CPR caused by rocks is reasonably invariant to the beta angle. We are looking to see if monostatic high-CPR polar craters have high or low values in the bistatic data. If we find areas that become low only in the bistatic data then this provides strong supporting evidence that these are ice deposits. Using Arecibo and Mini-RF we are acquiring the first ever planetary bistatic radar images at non beta =0 angles. These data provide a unique new piece of evidence to determine if the Moon's polar craters contain ice. JF - American Geophysical Union Fall Meeting AU - Bussey, B AU - Schulze, R AU - Wahl, D AU - Patterson, Gerald W AU - Nolan, M C AU - Jensen, R AU - Turner, Scott AU - Yocky, D AU - Cahill, Joshua T AU - Jakowatz, J AU - Carter, Lynn M AU - Neish, Catherine AU - Spudis, P AU - Raney, R Keith AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract P43B EP - 1919 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668228660?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Bistatic+radar+observations+of+the+Moon+using+the+Arecibo+Observatory+%26amp%3B+Mini-RF+on+LRO&rft.au=Bussey%2C+B%3BSchulze%2C+R%3BWahl%2C+D%3BPatterson%2C+Gerald+W%3BNolan%2C+M+C%3BJensen%2C+R%3BTurner%2C+Scott%3BYocky%2C+D%3BCahill%2C+Joshua+T%3BJakowatz%2C+J%3BCarter%2C+Lynn+M%3BNeish%2C+Catherine%3BSpudis%2C+P%3BRaney%2C+R+Keith%3BAnonymous&rft.aulast=Bussey&rft.aufirst=B&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - cDNA normalization by hydroxyapatite chromatography to enrich transcriptome diversity in RNA-seq applications AN - 1660430725; PQ0001000586 AB - Second-generation sequencing (SGS) has become the preferred method for RNA transcriptome profiling of organisms and single cells. However, SGS analysis of transcriptome diversity (including protein-coding transcripts and regulatory non-coding RNAs) is inefficient unless the sample of interest is first depleted of nucleic acids derived from ribosomal RNA (rRNA), which typically account for up to 95% of total intracellular RNA content. Here we describe a novel microscale hydroxyapatite chromatography (HAC) normalization method to remove eukaryotic and prokaryotic high abundant rRNA species, thereby increasing sequence coverage depth and transcript diversity across non-rRNA populations. RNA-seq analysis of Escherichia coli K-12 and human intracellular total RNA showed that HAC-based normalization enriched for all non-ribosomal RNA species regardless of RNA transcript abundance or length when compared with untreated controls. Microcolumn HAC normalization generated rRNA-depleted cDNA libraries comparable to the well-established duplex specific nuclease (DSN) normalization and Ribo-Zero rRNA-depletion methods, thus establishing microscale HAC as an effective, cost saving, and non-destructive alternative normalization technique. JF - BioTechniques AU - VanderNoot, Victoria A AU - Langevin, Stanley A AU - Solberg, Owen D AU - Lane, Pamela D AU - Curtis, Deanna J AU - Bent, Zachary W AU - Williams, Kelly P AU - Patel, Kamlesh D AU - Schoeniger, Joseph S AU - Branda, Steven S AU - Lane, Todd W AD - Biotechnology and Bioengineering Department, Sandia National Laboratories, Livermore, CA, USA Y1 - 2012/12// PY - 2012 DA - December 2012 SP - 373 EP - 380 PB - Eaton Publishing Co., One Research Drive, Suite 400A Westboro MA 01581 United States VL - 53 IS - 6 SN - 0736-6205, 0736-6205 KW - Biochemistry Abstracts 2: Nucleic Acids; Biotechnology and Bioengineering Abstracts KW - Gene expression KW - rRNA KW - Hydroxyapatite KW - nucleic acids KW - Chromatography KW - Abundance KW - Escherichia coli KW - non-coding RNA KW - Nuclease KW - W 30910:Imaging KW - N 14810:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660430725?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=BioTechniques&rft.atitle=cDNA+normalization+by+hydroxyapatite+chromatography+to+enrich+transcriptome+diversity+in+RNA-seq+applications&rft.au=VanderNoot%2C+Victoria+A%3BLangevin%2C+Stanley+A%3BSolberg%2C+Owen+D%3BLane%2C+Pamela+D%3BCurtis%2C+Deanna+J%3BBent%2C+Zachary+W%3BWilliams%2C+Kelly+P%3BPatel%2C+Kamlesh+D%3BSchoeniger%2C+Joseph+S%3BBranda%2C+Steven+S%3BLane%2C+Todd+W&rft.aulast=VanderNoot&rft.aufirst=Victoria&rft.date=2012-12-01&rft.volume=53&rft.issue=6&rft.spage=373&rft.isbn=&rft.btitle=&rft.title=BioTechniques&rft.issn=07366205&rft_id=info:doi/10.2144%2F000113937 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2016-04-29 N1 - SubjectsTermNotLitGenreText - Gene expression; Hydroxyapatite; rRNA; nucleic acids; Chromatography; Abundance; non-coding RNA; Nuclease; Escherichia coli DO - http://dx.doi.org/10.2144/000113937 ER - TY - JOUR T1 - Near-surface seismic refraction methods to characterize areas of karst geology near Carlsbad, NM AN - 1656035923; 2015-012449 AB - Near-surface seismic refraction methods applied to karst geology can give some ideas as to the nature of the void spaces as well as the stratigraphy of the area. A seismic geophone array was laid out near Carlsbad, NM, an area known to contain karst features. Using an impact (sledge hammer), seismic data was collected along two intersecting lines of geophones as well as two gridded areas to get three-dimensional information. The data was picked for the first arrivals of the P-wave, which were graphed and examined for changes in slope and inconsistencies in shape. The data analyzed shows a two-layer model and some inconsistencies such as polarity reversals and delayed arrival times that may represent karst features. Additional processing is used to enhances these features and map them in three-dimensions. The mapped features are compared with known karst features in the area (e.g. sinkholes) for ground-truth information. These methods may be used in the future for detection and classification of other near-surface voids. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Cafferky, S AU - Bonal, N D AU - Barnhart, K AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract NS13B EP - 1609 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656035923?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Near-surface+seismic+refraction+methods+to+characterize+areas+of+karst+geology+near+Carlsbad%2C+NM&rft.au=Cafferky%2C+S%3BBonal%2C+N+D%3BBarnhart%2C+K%3BAnonymous&rft.aulast=Cafferky&rft.aufirst=S&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-02-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Improved cavity detection from coupled seismic and hydrologic models AN - 1656033807; 2015-012508 AB - Seismic methods hold much promise for cavity detection, but the results from field measurements have been frustratingly inconsistent between field sites. The reasons for the inconsistencies are not fully understood, though water saturation in the near-surface may be responsible to some extent. The conventional approach has been to focus on reflections and refractions generated from the impedance contrast of the cavity wall itself, where the dimensions and geometry of the cavity should play key roles. Here, we instead focus on the influence of impedance contrasts that are generated by hydrologic processes in the adjacent porous medium. These contrasts can potentially increase or decrease the reflection/refraction footprint of the cavity itself. Detectable hydrologic anomalies can be created by the simple drainage of groundwater into the cavity (initially saturated conditions) or by the creation of a capillary barrier around the cavity (initially unsaturated conditions). Because both processes ultimately involve unsaturated conditions we use HYDRUS 2D to numerically solve the Richard's equation and simulate flow through the vadose zone. Using the generated soil moisture information and Brutsaert's (1964) saturation-velocity relation, we constructed velocity models. Our simulations suggest several scenarios where changes in saturation due to the cavity may be utilized to enhance cavity detection with seismic waves. One simulation is for unsaturated conditions in the top 10 meters of soil, where capillary forces exert a major influence on velocity. In this case, the impedance contrast is greatest for near-saturated soils. Deeper cavities (100s of meters) in permeable saturated materials are also favorable due to the sharp impedance contrast between saturated and unsaturated material. Our hydrology-determined velocity models are then used in finite-difference wave propagation simulations to determine the effects on seismic waves at various depths and saturations. Saturation features in the seismic data can then be utilized to detect cavities rather than relying on traditional yet inconsistent reflection/refraction approach. In ongoing work, we will ground-truth these models with both laboratory and experimental results. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Desilets, S AU - Bonal, N D AU - Desilets, D AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract NS31C EP - 1692 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656033807?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Improved+cavity+detection+from+coupled+seismic+and+hydrologic+models&rft.au=Desilets%2C+S%3BBonal%2C+N+D%3BDesilets%2C+D%3BAnonymous&rft.aulast=Desilets&rft.aufirst=S&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-02-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Modeling fluid flow in deformation bands with stabilized localization mixed finite elements AN - 1648909222; 2015-008660 AB - Deformation bands in geological materials refer to narrow zones of inhomogeneous strain. Their onset and propagation may cause significant changes in microstructures and therefore profoundly enhance or suppress fluid flow and induce anisotropy. These changes in hydraulic properties have strong implications in geotechnical engineering, carbon dioxide sequestration and nuclear waste storage. The difficulty in modeling such multiphysics phenomena is threefold. 1. Monolithically coupled promechanics formulation may lead to non-physical oscillation in pore pressure near the undrained limit if identical mesh and basis functions are used for pore pressure and displacement. 2. Onsets of deformation bands may lead to non-converging mesh-dependent results if no length scale is introduced to the finite element formulation. 3. Modeling anisotropy induced by the deformation band may require a very fine mesh to capture the sharp pore pressure gradient and results in a computational intensive system. In this study, we introduce a projection-based technique to stabilize a large deformation finite element model that eliminates the non-physical oscillation in pore pressure. Using a 1D analytical solution as guideline, we introduce a simple scheme that can adaptively update the optimal value for the stabilization parameter that can restore stability without over-diffusing the system. This stabilized model is coupled with a localization element technique used to introduce proper length scale to regularize the governing equations and resolve the fluid flow jumps across the deformation bands. Numerical examples are presented to demonstrate the properties and performance of the proposed localized models. JF - American Geophysical Union Fall Meeting AU - Sun, W AU - Ostien, J T AU - Foulk, J W AU - Abdeljawad, F AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H41N EP - 07 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648909222?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Modeling+fluid+flow+in+deformation+bands+with+stabilized+localization+mixed+finite+elements&rft.au=Sun%2C+W%3BOstien%2C+J+T%3BFoulk%2C+J+W%3BAbdeljawad%2C+F%3BAnonymous&rft.aulast=Sun&rft.aufirst=W&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Coupled flow and mechanics in porous and fractured media AN - 1648908810; 2015-008654 AB - Numerical models describing subsurface flow through deformable porous materials are important for understanding and enabling energy security and climate security. Some applications of current interest come from such diverse areas as geologic sequestration of anthropogenic CO2, hydro-fracturing for stimulation of hydrocarbon reservoirs, and modeling electrochemistry-induced swelling of fluid-filled porous electrodes. Induced stress fields in any of these applications can lead to structural failure and fracture. The ultimate goal of this research is to model evolving faults and fracture networks and flow within the networks while coupling to flow and mechanics within the intact porous structure. We report here on a new computational capability for coupling of multiphase porous flow with geomechanics including assessment of over-pressure-induced structural damage. The geomechanics is coupled to the flow via the variation in the fluid pore pressures, whereas the flow problem is coupled to mechanics by the concomitant material strains which alter the pore volume (porosity field) and hence the permeability field. For linear elastic solid mechanics a monolithic coupling strategy is utilized. For nonlinear elastic/plastic and fractured media, a segregated coupling is presented. To facilitate coupling with disparate flow and mechanics time scales, the coupling strategy allows for different time steps in the flow solve compared to the mechanics solve. If time steps are synchronized, the controller allows user-specified intra-time-step iterations. The iterative coupling is dynamically controlled based on a norm measuring the degree of variation in the deformed porosity. The model is applied for evaluation of the integrity of jointed caprock systems during CO2 sequestration operations. Creation or reactivation of joints can lead to enhanced pathways for leakage. Similarly, over-pressures can induce flow along faults. Fluid flow rates in fractures are strongly dependent on the effective hydraulic aperture, which is a non-linear function of effective normal stress. The dynamically evolving aperture field updates the effective, anisotropic permeability tensor, thus resulting in a highly coupled multiphysics problem. Two models of geomechanical damage are discussed: critical shear-slip criteria and a sub-grid joint model. Leakage rates through the caprock resulting from the joint model are compared to those assuming intact material, allowing a correlation between potential for leakage and injection rates/pressures, for various in-situ stratigraphies. JF - American Geophysical Union Fall Meeting AU - Martinez, M J AU - Newell, P AU - Bishop, J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H41N EP - 01 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648908810?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Coupled+flow+and+mechanics+in+porous+and+fractured+media&rft.au=Martinez%2C+M+J%3BNewell%2C+P%3BBishop%2C+J%3BAnonymous&rft.aulast=Martinez&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Cometary coma collisions on the Moon AN - 1648908492; 2015-010611 AB - Though the cometary impact flux at the Moon, relative to the flux of asteroidal impactors, remains relatively uncertain, past impacts of short-and long-period comets have undoubtedly contributed to the lunar cratering record. For instance, applying values published by Weissman (2007) for the combined impact fluxes of short-and long-period comets with a cumulative size-frequency distribution power law exponent of b = 0.5 (mean value for JFC observations) yields a mean time interval of just 0.294 Myr between cometary impacts of 200 meters or larger in diameter. These volatile-rich impactors are of interest as potential contributors to the lunar water budget; hydrogen isotope ratios recently measured in lunar rock samples suggest that comets are a likely source for lunar water. Identifying surface signatures of cometary impacts at the moon can provide observational constraints on estimates of the number of recent cometary impact events. While past studies have numerically modeled cometary nuclei impacts at the moon, the role of an active comet's atmosphere (coma) during the impact process has not been rigorously assessed. This work investigates how the presence of a tenuous inner coma affects cometary impact processes at the moon. Numerical calculations with CTH (McGlaun et al., 1990) are used to simulate the hypervelocity impact of an active comet by including a radial density decay profile for the coma structure surrounding the nucleus. Shock wave propagation is first initiated within the impacting coma, which precedes (and follows) an active comet nucleus during an impact. Modeling the complex interactions between the shocked coma, the porous cometary nucleus, and the lunar surface is necessary to assess possible surface signatures of such events at the moon. Accurate modeling of the impacting cometary structure as a whole (including its atmosphere) is also relevant to the efficacy of volatile delivery by comets. Initial calculations employing an axially symmetric, 2-D geometry (vertical impact) will be followed by fully 3-D models to simulate non-vertical impact angles. JF - American Geophysical Union Fall Meeting AU - Bruck Syal, M AU - Schultz, P H AU - Crawford, D A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract P11A EP - 1798 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648908492?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Cometary+coma+collisions+on+the+Moon&rft.au=Bruck+Syal%2C+M%3BSchultz%2C+P+H%3BCrawford%2C+D+A%3BAnonymous&rft.aulast=Bruck+Syal&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Modeling and experimental investigations of mixing-controlled geochemical and biological reactions at the pore scale AN - 1648908363; 2015-008672 AB - Several studies have demonstrated the important role played by mixing-controlled reactions in porous media. For example, transverse mixing of nutrients along the fringes of a contaminant plume is often the limiting step that controls overall degradation rate during natural or engineered in situ bioremediation. Similar mixing processes can promote precipitation/dissolution reactions during geological sequestration of carbon dioxide. Field and laboratory investigations have demonstrated that the length scale of transverse mixing zones can be very small, often on the order of centimeters or less. To study dispersion, mixing and reaction at this scale, we use pore-scale numerical simulation models and micro-fluidics laboratory experiments. An overview of our methods and findings, including comparisons between direct numerical simulations and laboratory experiments will be presented. The presentation will emphasize recent results including: (a) coupling of precipitation/dissolution with porosity reduction under different geochemical conditions, and (b) impact of pore structure on biodegradation and biofilm growth patterns. Our work has improved understanding of coupled flow, transport and reaction processes; however, there remain significant challenges in extending the results to larger field scales. JF - American Geophysical Union Fall Meeting AU - Valocchi, A J AU - Werth, C J AU - Yoon, H AU - Tang, Y AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H42E EP - 01 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648908363?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Modeling+and+experimental+investigations+of+mixing-controlled+geochemical+and+biological+reactions+at+the+pore+scale&rft.au=Valocchi%2C+A+J%3BWerth%2C+C+J%3BYoon%2C+H%3BTang%2C+Y%3BAnonymous&rft.aulast=Valocchi&rft.aufirst=A&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Capturing 3D resistivity of semi-arid karstic subsurface in varying moisture conditions using a wireless sensor network AN - 1648907947; 2015-010378 AB - The dissolution of soluble bedrock results in surface and subterranean karst channels, which comprise 7-10% of the dry Earth's surface. Karst serves as a preferential conduit to focus surface and subsurface water but it is difficult to exploit as a water resource or protect from pollution because of irregular structure and nonlinear hydrodynamic behavior. Geophysical characterization of karst commonly employs resistivity and seismic methods, but difficulties arise due to low resistivity contrast in arid environments and insufficient resolution of complex heterogeneous structures. To help reduce these difficulties, we employ a state-of-the-art wireless geophysical sensor array, which combines low-power radio telemetry and solar energy harvesting to enable long-term in-situ monitoring. The wireless aspect removes topological constraints common with standard wired resistivity equipment, which facilitates better coverage and/or sensor density to help improve aspect ratio and resolution. Continuous in-situ deployment allows data to be recorded according to nature's time scale; measurements are made during infrequent precipitation events which can increase resistivity contrast. The array is coordinated by a smart wireless bridge that continuously monitors local soil moisture content to detect when precipitation occurs, schedules resistivity surveys, and periodically relays data to the cloud via 3G cellular service. Traditional 2/3D gravity and seismic reflection surveys have also been conducted to clarify and corroborate results. JF - American Geophysical Union Fall Meeting AU - Barnhart, K AU - Oden, C P AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract NS33A EP - 02 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648907947?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Capturing+3D+resistivity+of+semi-arid+karstic+subsurface+in+varying+moisture+conditions+using+a+wireless+sensor+network&rft.au=Barnhart%2C+K%3BOden%2C+C+P%3BAnonymous&rft.aulast=Barnhart&rft.aufirst=K&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Simulations of the influence of MHK-turbine operation on hydrodynamics and sediment transport for Scotlandville Bend, Mississippi River AN - 1641013259; 2015-000819 AB - Water-current MHK turbines are receiving growing interest in many parts of the world with hydrokinetic resources. However, little is known about the potential effects of MHK device operation in coastal waters, estuaries, or rivers, or of the cumulative impacts of these devices on aquatic ecosystems over years or decades of operation. This lack of knowledge affects the actions of regulatory agencies, the opinions of stakeholder groups, and the commitment of energy project developers and investors. There is an urgent need for practical, accessible tools and peer-reviewed publications to help industry and regulators evaluate environmental impacts and mitigation measures and to establish best siting and design practices. This study presents a methodology to assess the hydrokinetic potential and its environmental effects in a reach of the Mississippi river. The potential changes to the physical environment imposed by operation of MHK turbine arrays were evaluated using the modeling platform SNL-EFDC. Energy extraction is simulated using momentum sinks recently coded into SNL-EFDC, which is an augmented version of US EPA's Environmental Fluid Dynamics Code (EFDC). Three different scenarios (4-, 23- and 112-piling arrays) were development for SNL-EFDC simulations. The four-piling array included 12 turbines; the 23-piling, 132 turbines; and the 112-piling, 638 turbines. As expected, average velocities decrease downstream of each MHK device due to energy removal and blunt-body form drag from the MHK support structures. Furthermore, the velocity profiles exhibit a wake velocity deficit downstream of the last MHK row, which disappears within about 15 array widths downstream. This mirrors the approximate recovery of the wake for a single MHK turbine in a straight channel, which recovers to a approximately 10% deficit around 15 device diameters downstream. Changes in the flow field also alter sediment transport dynamics around and downstream of an MHK array. Model results with and without an MHK array were compared to facilitate an understanding of how MHK-turbine arrays might alter the river environment. These simulations and scenario analyses can assist cost-effective planning before proceeding to detailed siting, engineering designs, and deployment of devices. JF - American Geophysical Union Fall Meeting AU - Barco, J AU - Johnson, E AU - Roberts, J D AU - James, S C AU - Jones, C AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract OS51C EP - 1886 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641013259?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Simulations+of+the+influence+of+MHK-turbine+operation+on+hydrodynamics+and+sediment+transport+for+Scotlandville+Bend%2C+Mississippi+River&rft.au=Barco%2C+J%3BJohnson%2C+E%3BRoberts%2C+J+D%3BJames%2C+S+C%3BJones%2C+C%3BAnonymous&rft.aulast=Barco&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Determination of thermal conductivity of reconsolidated crushed salt to 200 degrees C AN - 1641011124; 2015-002034 AB - Thermal, mechanical, and fluid transport properties of reconsolidating granular salt are important for design, analysis and performance assessment of potential salt repositories for heat-generating nuclear waste. Properties such as thermal conductivity (lambda ) and permeability (k) are functions of porosity. To inform salt repository evaluations, where salt creep at elevated pressures and temperatures will reduce the porosity of salt enclosures, we have undertaken an experimental program to determine lambda of reconsolidated granular salt as a function of porosity, with the secondary intent of quantifying temperature dependence over a range of temperatures from 100-200 degrees C. Mine-run salt from the Waste Isolation Pilot Program (WIPP) was first dried at 100 degrees C until weight loss ceased. The disaggregated salt was compacted at room temperature by quasistatic die compression into samples with porosities ranging from 40% (unconsolidated) to 5%. Thermal conductivity was also measured on intact domal salt, WIPP bedded salt, and commercially available salt licks in order to determine lambda in salt with porosity as low as 1-8%. For every sample, measurements were made at 100, 125, 150, 175, and 200 degrees C using a guarded heat flow meter. Thermal conductivity was found to decrease by a factor of about 4-5 for the porosity range studied. The lambda versus porosity relationship is well represented by a simple mixture model. A temperature dependence is also observed, the effect of which increases at lower porosities. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Urquhart, A AU - Bauer, S J AU - Hansen, F D AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR33A EP - 2435 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011124?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Determination+of+thermal+conductivity+of+reconsolidated+crushed+salt+to+200+degrees+C&rft.au=Urquhart%2C+A%3BBauer%2C+S+J%3BHansen%2C+F+D%3BAnonymous&rft.aulast=Urquhart&rft.aufirst=A&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Reconsolidation of crushed salt to 250 degrees C under hydrostatic and shear stress conditions AN - 1641011121; 2015-002033 AB - Design, analysis and performance assessment of potential salt repositories for heat-generating nuclear waste require knowledge of thermal, mechanical, and fluid transport properties of reconsolidating granular salt. Mechanical properties, Bulk (K) and Elastic (E) Moduli and Poisson's ratio (nu ) are functions of porosity which decreases as the surrounding salt creeps inward and compresses granular salt within the rooms, drifts or shafts. To inform salt repository evaluations, we have undertaken an experimental program to determine K, E, and nu of reconsolidated granular salt as a function of porosity and temperature and to establish the deformational processes by which the salt reconsolidates. The experiments will be used to populate the database used in the reconsolidation model developed by Callahan (1999) which accounts for the effects of moisture through pressure solution and dislocation creep, with both terms dependent on effective stress to account for the effects of porosity. Mine-run salt from the Waste Isolation Pilot Program (WIPP) was first dried at 105 degrees C for a few days. Undeformed right-circular cylindrical sample assemblies of unconsolidated granular salt with an initial porosity of approximately 40%, nominally 10 cm in diameter and 17.5 cm in length, are jacketed in lead. Samples are placed in a pressure vessel and kept at test temperatures of 100, 175 or 250 degrees C; samples are vented to the atmosphere during the entire test procedure. At these test conditions the consolidating salt is always creeping, the creep rate increases with increasing temperature and stress and decreases as porosity decreases. In hydrostatic tests, confining pressure is increased to 20 MPa with periodic unload/reload loops to determine K. Volume strain increases with increasing temperature. In shear tests at 2.5 and 5 MPa confining pressure, after confining pressure is applied, the crushed salt is subjected to a differential stress, with periodic unload/reload loops to determine E and nu . At predetermined differential stress levels the stress is held constant and the salt consolidates. Displacement gauges mounted on the samples show little lateral deformation until the samples reach a porosity of approximately 10%. Interestingly, vapor is vented in tests at 250 degrees C and condenses at the vent port. Release of water is not observed in the lower two test temperatures. It is hypothesized that the water originates from fluid inclusions, which were made accessible by intragranular deformational processes including decrepitation. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Broome, S T AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR33A EP - 2434 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011121?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Reconsolidation+of+crushed+salt+to+250+degrees+C+under+hydrostatic+and+shear+stress+conditions&rft.au=Broome%2C+S+T%3BAnonymous&rft.aulast=Broome&rft.aufirst=S&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Microstructural analysis of reconsolidated crushed salt at 250 degrees C AN - 1641011016; 2015-002036 AB - Reconsolidation of crushed salt is a very important physical phenomenon when backfilling or sealing nuclear waste repositories in salt is considered. There is a long history of testing crushed salt backfill for salt repository applications. Over the years, salt reconsolidation has been a topic of great interest to international salt repository studies. A preponderance of these studies was conducted at room temperature, with a few tests at elevated temperatures up to 100 degrees C. Today there is a renewed national and international interest in salt reconsolidation at elevated temperature, particularly as applied to disposal of heat-generating nuclear waste. Mine-run salt was first dried at 105 degrees C until no further weight loss was observed. Several reconsolidated granular salt specimens were deformed at 250 degrees C in a triaxial apparatus under hydrostatic-quasistatic, shear-quasistatic, and creep conditions. Nominally, these test specimens were consolidated from 35% to approximately 10% porosity, which is estimated from random point counting and mechanical test data. Deformation mechanisms are inferred from microstructural observations made using optical and electron microscopy on fragments of the tested specimen, polished thin sections, and etched cleavage chips. Extensive deformation is exhibited in the final state. While naturally occurring salt grains are easily cleaved, individual granules extracted from the reconsolidated mass post-test were very difficult to cleave because the internal crystal structure is highly distorted. We assume initial porosity is removed by grain boundary sliding and attendant comminution because unsutured grain boundaries are decorated with fine particles. Widespread crystal plasticity is manifested in elongate and sinuous grain fabric. Etching techniques highlight heavily deformed grains that exhibit wavy slip band microstructures, and climb recovery processes with an associated minute subgrain size. Free dislocation density is sparse in the highly deformed grains. Despite massive tangles of substructure and hence potentially high internal strain energy, only minor dynamic recrystallization is observed. And, despite drying the granular salt to an accepted dry condition, apparently sufficient brine remains within the crystal lattice as fluid inclusions to facilitate fluid assisted diffusional transfer. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Wells, R K AU - Bauer, S J AU - Hansen, F D AU - Broome, S T AU - Urquhart, A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR33A EP - 2437 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011016?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Microstructural+analysis+of+reconsolidated+crushed+salt+at+250+degrees+C&rft.au=Wells%2C+R+K%3BBauer%2C+S+J%3BHansen%2C+F+D%3BBroome%2C+S+T%3BUrquhart%2C+A%3BAnonymous&rft.aulast=Wells&rft.aufirst=R&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Estimating fracture spacing from natural tracers in shale-gas production AN - 1641011011; 2015-002056 AB - Resource appraisal and long-term recovery potential of shale gas relies on the characteristics of the fracture networks created within the formation. Both well testing and analysis of micro-seismic data can provide information on fracture characteristics, but approaches that directly utilize observations of gas transport through the fractures are not well-developed. We examine transport of natural tracers and analyze the breakthrough curves (BTC's) of these tracers with a multi-rate mass transfer (MMT) model to elucidate fracture characteristics. The focus here is on numerical simulation studies to determine constraints on the ability to accurately estimate fracture network characteristics as a function of the diffusion coefficients of the natural tracers, the number and timing of observations, the flow rates from the well, and the noise in the observations. Traditional tracer testing approaches for dual-porosity systems analyze the BTC of an injected tracer to obtain fracture spacing considering a single spacing value. An alternative model is the MMT model where diffusive mass transfer occurs simultaneously over a range of matrix block sizes defined by a statistical distribution (e.g., log-normal, gamma, or power-law). The goal of the estimation is defining the parameters of the fracture spacing distribution. The MMT model has not yet been applied to analysis of natural in situ natural tracers. Natural tracers are omnipresent in the subsurface, potentially obviating the needed for introduced tracers, and could be used to improve upon fracture characteristics estimated from pressure transient and decline curve production analysis. Results of this study provide guidance for data collection and analysis of natural tracers in fractured shale formations. Parameter estimation on simulated BTC's will provide guidance on the necessary timing of BTC sampling in field experiments. The MMT model can result in non-unique or nonphysical parameter estimates. We address this with Bayesian estimation approaches that can define uncertainty in estimated parameters as a posterior probability distribution. We will also use Bayesian estimation to examine model identifiability (e.g., selecting between parametric distributions of fracture spacing) from various BTC's. Application of the MMT model to natural tracers and hydraulic fractures in shale will require extension of the model to account for partitioning of the tracers between multiple phases and different mass transfer behavior in mixed gas-liquid (e.g., oil or groundwater rich) systems. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Bauer, S J AU - McKenna, S A AU - Heath, J E AU - Gardner, P AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR33B EP - 2457 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011011?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Estimating+fracture+spacing+from+natural+tracers+in+shale-gas+production&rft.au=Bauer%2C+S+J%3BMcKenna%2C+S+A%3BHeath%2C+J+E%3BGardner%2C+P%3BAnonymous&rft.aulast=Bauer&rft.aufirst=S&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Using the Sandia Z Machine to probe water at planetary conditions; redefining the properties of water in the ice giants AN - 1641011008; 2015-002022 AB - Recently, there has been a tremendous increase in the number of identified extrasolar planetary systems. Our understanding of their formation is tied to exoplanet internal structure models, which rely upon equation of state (EOS) models of light elements and compounds such as water at multi-Mbar pressure conditions. For the past decade, a large, interdisciplinary team at Sandia National Laboratories has been refining the Z Machine (20+ MA and 10+ MGauss) into a mature, robust, and precise platform for material dynamics experiments in the multi-Mbar pressure regime. In particular, significant effort has gone into effectively coupling condensed matter theory, magneto-hydrodynamic simulation, and electromagnetic modeling to produce a fully self-consistent simulation capability able to very accurately predict the performance of the Z machine and various experimental load configurations. This capability has been instrumental in the ability to develop experimental platforms to routinely perform magnetic ramp compression experiments to over 4 Mbar, and magnetically accelerate flyer plates to over 40 km/s, creating over 20 Mbar impact pressures. Furthermore, a strong tie has been developed between the condensed matter theory and the experimental program. This coupling has been proven time and again to be extremely fruitful, with the capability of both theory and experiment being challenged and advanced through this close interrelationship. This presentation will provide a short overview of the material dynamics platform and discuss in more detail the use of Z to perform extreme material dynamics studies with unprecedented accuracy on water in support of basic science, planetary astrophysics, and the emerging field of high energy density laboratory physics. It was found that widely used EOSs for water are much too compressible (up to 30 percent) at pressures and temperatures relevant to planetary interiors. Furthermore, it is shown that the behavior of water at these conditions, including its reflectivity and isentropic response, is well-described by an EOS for water based on recent first-principles calculations. These findings advocate that this water model be used as the standard for modeling Neptune, Uranus, and "hot Neptune" exoplanets, and should improve our understanding of these types of planetary systems. Sandia National Laboratories is a multiprogram laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under Contract No. DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Knudson, M D AU - Desjarlais, M AU - Lemke, R AU - Mattsson, T AU - French, Martin AU - Nettelmann, Nadine AU - Redmer, Ronald AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR32A EP - 03 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011008?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Using+the+Sandia+Z+Machine+to+probe+water+at+planetary+conditions%3B+redefining+the+properties+of+water+in+the+ice+giants&rft.au=Knudson%2C+M+D%3BDesjarlais%2C+M%3BLemke%2C+R%3BMattsson%2C+T%3BFrench%2C+Martin%3BNettelmann%2C+Nadine%3BRedmer%2C+Ronald%3BAnonymous&rft.aulast=Knudson&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Variation of mudstone mechanical properties by lithofacies, upper Mancos Shale, San Juan Basin, NM AN - 1641011006; 2015-002048 AB - Predicting mechanical behavior of mudstones in the subsurface is a critical need for underground waste storage and resource extraction. To meet this need and to advance knowledge of the details of mudstone deformation, we are currently testing 6 muddy lithofacies from a traditional rock core in the Upper Mancos Shale, Gavilan Oil Pool, Eastern San Juan Basin, NM. The lithofacies include a laminated weakly bioturbated and a fully bioturbated muddy very fine sandstone, a weakly bioturbated thinly laminated and a fully bioturbated fossiliferous calcareous mudstone, and a weakly bioturbated thinly laminated and a fully bioturbated quartz-rich silty calcareous mudstone. For each lithofacies, we are performing a series of drained compression tests with the samples equilibrated and held at a constant relative humidity (76%). A compression test series includes an unconfined constant stress test, a hydrostatic compression test, and two constant mean stress tests, with an additional test in each series to confirm reproducibility. Each test includes measurements of axial and lateral displacement, axial force, confining pressure, and acoustic emission (AE) and ultrasonic monitoring (UM). The AE and UM monitoring occur on the same array of piezoelectric transducers, including 12 1-MHz PZT-5A compressional transducers arranged in 3 circumferential rings, and 4 1 MHz cross-cut quartz compressional transducers mounted in the sample end pieces. AE monitoring is continuous through each test, and UM monitoring occurs before and after each unload-load loop during the test. Pre- and post-test thin sections and a detailed lithologic description are being performed on each sample, as well as pre- and post-test medical grade x-ray CT scans. When the study is complete, we hope to provide the community with detailed understanding of mudstone deformation, as well as coupling classical lithofacies descriptions with rock tests to help predict the variation of mechanical properties in mudstones. This material is based upon work supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Rinehart, A J AU - Broome, S T AU - Holcomb, D AU - Dewers, T A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR33B EP - 2449 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641011006?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Variation+of+mudstone+mechanical+properties+by+lithofacies%2C+upper+Mancos+Shale%2C+San+Juan+Basin%2C+NM&rft.au=Rinehart%2C+A+J%3BBroome%2C+S+T%3BHolcomb%2C+D%3BDewers%2C+T+A%3BAnonymous&rft.aulast=Rinehart&rft.aufirst=A&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Prediction of hydraulic and electrical transport properties of sandstone with multiscale lattice Boltzmann/finite element simulation on microtomographic images AN - 1641010985; 2015-002037 AB - Microcomputed tomography can be used to characterize the geometry of the pore space of a sedimentary rock, with resolution that is sufficiently refined for the realistic simulation of physical properties based on the 3D image. Significant advances have been made on the characterization of pore size distribution and connectivity, development of techniques such as lattice Boltzmann method to simulate permeability, and its upscaling. Sun, Andrade and Rudnicki (2011) recently introduced a multiscale method that dynamically links these three aspects, which were often treated separately in previous computational schemes. In this study, we improve the efficiency of this multiscale method by introducing a flood-fill algorithm to determine connectivity of the pores, followed by a multiscale lattice Boltzmann/finite element calculation to obtain homogenized effective anisotropic permeability. The improved multiscale method also includes new capacity to consistently determine electrical conductivity and formation factor from CT images. Furthermore, we also introduce a level set based method that transforms pore geometry to finite element mesh and thus enables direct simulation of pore-scale flow with finite element method. When applied to the microCT data acquired by Lindquist et al. (2000) for four Fontainebleau sandstone samples with porosities ranging from 7.5% to 22%, this multiscale method has proved to be computationally efficient and our simulations has provided new insights into the relation among permeability, pore geometry and connectivity. JF - American Geophysical Union Fall Meeting AU - Wong, T AU - Sun, W AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR33A EP - 2438 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641010985?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Prediction+of+hydraulic+and+electrical+transport+properties+of+sandstone+with+multiscale+lattice+Boltzmann%2Ffinite+element+simulation+on+microtomographic+images&rft.au=Wong%2C+T%3BSun%2C+W%3BAnonymous&rft.aulast=Wong&rft.aufirst=T&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Network representation of pore scale imagery for percolation models AN - 1637543085; 2014-104067 AB - Multiphase flow under capillary dominated flow regimes is driven by an intricate relationship between pore geometry, material and fluid properties. In this research, high-resolution micro-computed tomography (CT) imaging experiments are used to investigate structural and surface properties of bead packs, and how they influence percolation pathways. Coreflood experiments use a mix of hydrophilic and hydrophobic beads to track the influence of variable contact angle on capillary flow. While high-resolution CT images can render micron scale representation of the pore space, data must be upscaled to capture pore and pore throat geometry for use in percolation models. In this analysis, the pore space is upscaled into a network representation based on properties of the medial axis. Finding the medial axis using micron scale images is computationally expensive. Here, we compare the efficiency and accuracy of medial axes using erosion-based and watershed algorithms. The resulting network representation is defined as a ball-and-stick model which represents pores and pore throats. The ball-and-stick model can be further reduced by eliminating sections of the network that fall below a capillary pressure threshold. In a system of mixed hydrophilic and hydrophobic beads, capillary pressure can change significantly throughout the network based on the interaction between surface and fluid properties. The upscaled network representations are used in percolation models to estimate transport pathway. Current results use a basic percolation model that sequentially fills neighboring pores with the highest potential. Future work will expand the percolation model to include additional mechanics, such as trapping, vacating pores, and viscous fingering. Results from the coreflood experiments will be used to validate upscaling techniques and percolation models. Preliminary results show that the relative strength of water-wet and oil-wet surfaces has a significant impact on percolation. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Klise, K A AU - McKenna, S A AU - Read, E AU - Karpyn, Z T AU - Celauro, J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H53G EP - 1611 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637543085?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Network+representation+of+pore+scale+imagery+for+percolation+models&rft.au=Klise%2C+K+A%3BMcKenna%2C+S+A%3BRead%2C+E%3BKarpyn%2C+Z+T%3BCelauro%2C+J%3BAnonymous&rft.aulast=Klise&rft.aufirst=K&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H53G/abstracts/H53G-1611.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Coupled multi-physics analysis of caprock integrity and fault reactivation during CO (sub 2) sequestration AN - 1637543000; 2014-103947 AB - Structural/stratigraphic trapping beneath a low-permeable caprock layer is the primary trapping mechanism for long-term subsurface sequestration of CO2. Pre-existing fracture networks, injection induced fractures, and faults are of concern for possible CO2 leakage both during and after injection. In this work we model the effects of both caprock jointing and a fault on the caprock sealing integrity during various injection scenarios. The modeling effort uses a three-dimensional finite-element based coupled multiphase flow and geomechanics simulator. The joints within the caprock are idealized as equally spaced and parallel. Both the mechanical and flow behavior of the joint network are treated within an effective continuum formulation. The mechanical behavior of the joint network is linear elastic in shear and nonlinear elastic in the normal direction. The flow behavior of the joint network is treated using the classical cubic-law relating flow rate and aperture. The flow behavior is then upscaled to obtain an effective permeability. The fault is modeled as a finite-thickness layer with multiple joint sets. The joint sets within the fault region are modeled following the same mechanical and flow formulation as the joints within the caprock. Various injection schedules as well as fault and caprock jointing configurations within a proto-typical sequestration site have been investigated. The resulting leakage rates through the caprock and fault are compared to those assuming intact material. The predicted leakage rates are a strong nonlinear function of the injection rate. JF - American Geophysical Union Fall Meeting AU - Newell, P AU - Martinez, M J AU - Bishop, J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H51H EP - 1448 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637543000?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Coupled+multi-physics+analysis+of+caprock+integrity+and+fault+reactivation+during+CO+%28sub+2%29+sequestration&rft.au=Newell%2C+P%3BMartinez%2C+M+J%3BBishop%2C+J%3BAnonymous&rft.aulast=Newell&rft.aufirst=P&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Thermoreflectance of gold; a temperature gauge for ramp compression experiments AN - 1637542178; 2014-104231 AB - Temperature measurements in dynamic studies are typically accomplished with streaked visible pyrometry; shocked samples often reach thousands to tens of thousands of degrees and emit copious amounts of Planck radiation. The development of ramp compression methods has led to the ability to quasi-isentropically compress materials; with this load path, temperatures are typically too low to measure with conventional streaked pyrometry. An alternative method, based on the thermoreflectance of gold is being evaluated at Sandia. The spectral reflectance of gold changes dramatically in the visible - hence the color of gold. The position of the steepest slope in the reflectivity spectrum, and the relative magnitude of the reflectivity in the red and blue regions are found to be strong functions of temperature suggesting the possibility of a temperature diagnostic for ramp compression studies based on the reflectance of an embedded gold gauge. Quantitative measurements of the pressure and temperature effects on the thermoreflectance of gold will be presented, and the outlook for this temperature diagnostic discussed. Sandia National Laboratories is a multi-program laboratory operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Seagle, C T AU - Dolan, D H AU - Ao, T AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR23B EP - 2413 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542178?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Thermoreflectance+of+gold%3B+a+temperature+gauge+for+ramp+compression+experiments&rft.au=Seagle%2C+C+T%3BDolan%2C+D+H%3BAo%2C+T%3BAnonymous&rft.aulast=Seagle&rft.aufirst=C&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Modeling transient streaming potentials in coupled saturated-unsaturated zone flow to a pumping well AN - 1637531418; 2014-101132 AB - A semi-analytical model for transient response of streaming potentials (SP) to pumping in an unconfined aquifer, taking into account unsaturated zone flow, is presented. Flow in the unsaturated zone is modeled with a linearized Richards' equation with the moisture retention curve and unsaturated hydraulic conductivity assumed to be exponential functions of matric potential. For the case presented here, the same sorption number is assumed for moisture retention and unsaturated hydraulic conductivity. The ratio of the unsaturated to saturated electrokinetic coupling coefficient is described by C (sub {\ell,r}) =k (sub r) S (sub w) (super {(d+1)}) , where k (sub r) is relative hydraulic conductivity, S (sub w) is saturation, and d is Archie's second exponent. Hence, based on the assumption of an exponential moisture retention curve, C (sub {\ell,r}) is also an exponential function of matric potential. Model predicted responses in the saturated and unsaturated zones are compared with measured SP responses to pumping in a bench-scale experimental setup that simulates a radially bounded unconfined aquifer. Potential for using SP responses to estimate saturated and unsaturated hydraulic parameters is evaluated. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. This research is funded by WIPP programs administered by the Office of Environmental Management (EM) of the U.S Department of Energy. JF - American Geophysical Union Fall Meeting AU - Malama, B AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H43D EP - 1369 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637531418?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Modeling+transient+streaming+potentials+in+coupled+saturated-unsaturated+zone+flow+to+a+pumping+well&rft.au=Malama%2C+B%3BAnonymous&rft.aulast=Malama&rft.aufirst=B&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H43D/abstracts/H43D-1369.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Radial flow towards well in leaky unconfined aquifer AN - 1637531250; 2014-101138 AB - An analytical solution is developed for three-dimensional flow towards a partially penetrating large- diameter well in an unconfined aquifer bounded below by a leaky aquitard of finite or semi-infinite extent. The analytical solution is derived using Laplace and Hankel transforms, then inverted numerically. Existing solutions for flow in leaky unconfined aquifers neglect the unsaturated zone following an assumption of instantaneous drainage due to Neuman. We extend the theory of leakage in unconfined aquifers by (1) including water flow and storage in the unsaturated zone above the water table, and (2) allowing the finite-diameter pumping well to partially penetrate the aquifer. The investigation of model-predicted results shows that aquitard leakage leads to significant departure from the unconfined solution without leakage. The investigation of dimensionless time-drawdown relationships shows that the aquitard drawdown also depends on unsaturated zone properties and the pumping-well wellbore storage effects. JF - American Geophysical Union Fall Meeting AU - Mishra, P K AU - Kuhlman, K L AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H43D EP - 1375 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637531250?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Radial+flow+towards+well+in+leaky+unconfined+aquifer&rft.au=Mishra%2C+P+K%3BKuhlman%2C+K+L%3BAnonymous&rft.aulast=Mishra&rft.aufirst=P&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H43D/abstracts/H43D-1375.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Effects of a potash mine roof fall observed in nearby monitoring wells AN - 1637531001; 2014-101137 AB - At approximately 5 AM on March 18, 2012, a significant collapse occurred in a potash mine near the Department of Energy's Waste Isolation Pilot Plant (WIPP). The US Geological Survey estimated the event to be magnitude 2.9. Two wells in the WIPP regional groundwater monitoring network experienced oscillatory water level fluctuations greater than 5 feet in response to the event. The changes in water level decayed slowly over several weeks following the event. The potash mine is located in the McNutt Potash zone of the Salado Formation, which is 1000-1400 feet below ground surface (BGS) near the location of the roof fall. The monitoring wells are completed in the semi-confined Culebra Dolomite member of the Rustler Formation, which is 375 feet BGS. The observed response is compared to published well responses to earthquakes and other seismic events. We explore the potential for using the event to characterize aquifer parameters. This research is funded by WIPP programs administered by the Office of Environmental Management (EM) of the U.S Department of Energy. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000 JF - American Geophysical Union Fall Meeting AU - Kuhlman, K L AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H43D EP - 1374 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637531001?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Effects+of+a+potash+mine+roof+fall+observed+in+nearby+monitoring+wells&rft.au=Kuhlman%2C+K+L%3BAnonymous&rft.aulast=Kuhlman&rft.aufirst=K&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H43D/abstracts/H43D-1374.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Upscaling of U(VI) desorption modeling from batch scale to decimeter scale AN - 1637530946; 2014-101086 AB - Uranium (VI) is a contaminant of concern in several groundwater aquifers at many former uranium mills and processing facilities. Understanding the migration of U(VI) is important in assessing the risk of groundwater contamination and the efficacy of treatment options. Accurate prediction of field-scale migration is difficult because often key model parameters such as adsorption equilibrium and rate parameters are determined in batch scale experiments. These parameters need to be upscaled when used to simulate larger scale simulations. To better understand the impact of scale on transport, this research incorporates previous batch scale experimental data in the interpretation of decimeter scale tank experiments involving uranium desorption. In the decimeter scale experiments, different grain size fractions were used to create porous media systems with known physical and chemical heterogeneity. Tracer results allowed hydraulic parameters to be calibrated independently of chemical equilibrium parameters. Geochemical observations were used to evaluate alternative adsorption and mass transfer models with varying complexity. Surface complexation models derived from batch experiments were evaluated under different decimeter scale model conditions. A two dimensional reactive transport model was calibrated to the decimeter scale experiments and the model reproduced the observed transport. The flux-averaged concentrations exiting the tank were also reproduced by a one dimensional model that included a dual porosity formulation to account for heterogeneity. The decimeter scale model calibrations help determine the effectiveness of these methods of reducing complexity, which can later be applied to improve predictions of tracer and site scale systems. JF - American Geophysical Union Fall Meeting AU - Kannappan, R AU - Hay, M B AU - Miller, A W AU - Kohler, M AU - Rodriguez, D AU - Davis, J A AU - Curtis, G P AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H34C EP - 02 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637530946?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Upscaling+of+U%28VI%29+desorption+modeling+from+batch+scale+to+decimeter+scale&rft.au=Kannappan%2C+R%3BHay%2C+M+B%3BMiller%2C+A+W%3BKohler%2C+M%3BRodriguez%2C+D%3BDavis%2C+J+A%3BCurtis%2C+G+P%3BAnonymous&rft.aulast=Kannappan&rft.aufirst=R&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Streaming potential response during pumping in a fractured rock aquifer AN - 1637530859; 2014-100988 AB - When water flows through a geologic medium in the subsurface, an electric field is generated in the flow field due to direct electrokinetic coupling attributed to existence of the electric double layer (EDL) at the rock-water interface. The electric potentials, referred to as streaming potentials (SP), associated with such an electric field can be measured and used to characterize the groundwater flow-field. Although there have been several attempts to quantify aquifer properties such as transmissivity and storativity using responses of SP to pumping of groundwater, the correlation between SP and in situ groundwater flow in fractured rock has not been investigated thoroughly. To quantify their correlation, nine vertical boreholes with 10 m length were radially installed in an underground tunnel whose host rock is fractured granite. Geophysical logging such as acoustic televiewing and hydraulic testing were conducted to characterize the hydrogeologic properties of the host rock at the test boreholes. Electrodes were installed in each borehole and SP responses were observed with the electrodes during pumping at the central borehole in the test borehole nest. Results show that a small-scale permeable fracture zone with a transmissivity of approximately m2/s crosses five boreholes including the pumping borehole. The SP response at each borehole indicates connectivity between the fracture zone and boreholes well. JF - American Geophysical Union Fall Meeting AU - Ji, S AU - Lee, H AU - Kim, B AU - Malama, B AU - Koh, Y AU - Lee, M AU - Choi, J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H33D EP - 1359 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637530859?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Streaming+potential+response+during+pumping+in+a+fractured+rock+aquifer&rft.au=Ji%2C+S%3BLee%2C+H%3BKim%2C+B%3BMalama%2C+B%3BKoh%2C+Y%3BLee%2C+M%3BChoi%2C+J%3BAnonymous&rft.aulast=Ji&rft.aufirst=S&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Experimental evaluation of water films on mineral surfaces in hydrous supercritical CO (sub 2) AN - 1629942830; 2014-098187 AB - For geologic CO (sub 2) sequestration, supercritical CO (sub 2) is pumped underground in an anhydrous state, but hydrates by dissolution of water from pore fluids into the supercritical phase. Hydration in the plume changes spatially and temporally as pumping continues, areas near the well-bore dry out, and porewaters become more concentrated by CO (sub 2) absorption and water loss to the supercritical phase. As the concentration and activity of water in the supercritical phase changes, water film thicknesses on reservoir mineral surfaces, controlled by adsorptive and capillary processes will change. Recently, models for these processes in scCO (sub 2) , based on vadose zone models, have been developed and indicate that at corresponding water activities, water films will be much thinner in scCO (sub 2) than in vadose zone (air-water) systems. Here, quartz crystal microbalance measurements of water film development on silica are presented, showing that water adsorption is much less in scCO (sub 2) than in ambient pressure N (sub 2) and CO (sub 2) systems. Water sorption by cation-substituted montmorillonite clays as a function of water activity was also measured. In this case, water sorption combines the effects of interlayer sorption, surface adsorption, and intergranular capillarity. As with the silica, sorption is much lower in scCO (sub 2) than in ambient pressure systems. These results confirm the modeling results that predict thinner water films in scCO (sub 2) , and imply that capillary and pore rewetting processes (e.g. snapoff) will be much less important than in vadose systems with similar pore structures. Moreover, water activities in the supercritical phase will be limited due to dissolution of CO (sub 2) into the contacting aqueous phase and the solute content of the aqueous phase, further affecting capillary and saturation processes. On the reservoir-scale, changes in rock saturation with water activity in the supercritical phase will affect reservoir rock CO (sub 2) and water permeabilities and CO (sub 2) injectivities. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Bryan, C R AU - Matteo, E AU - Dewers, T A AU - Heath, J E AU - Wang, Y AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H21K EP - 02 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629942830?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Experimental+evaluation+of+water+films+on+mineral+surfaces+in+hydrous+supercritical+CO+%28sub+2%29&rft.au=Bryan%2C+C+R%3BMatteo%2C+E%3BDewers%2C+T+A%3BHeath%2C+J+E%3BWang%2C+Y%3BAnonymous&rft.aulast=Bryan&rft.aufirst=C&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H21K/abstracts/H21K-02.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Reactivity of reservoir-caprock minerals in the context of geologic carbon sequestration AN - 1629941906; 2014-098211 AB - Alteration of mineral surfaces during a geologic carbon sequestration project may have significant effects on reservoir/caprock porosity, permeability, and mineral wetting properties, indirectly affecting CO2 injectivity or distribution of the injection plume. Experimental studies were carried out to assess the potential for surface alteration of reservoir-caprock minerals upon exposure to humidified CO2/air atmosphere, CO2-saturated water, and wet supercritical CO2 (scCO2). Mineral samples (albite, orthoclase, labradorite, and muscovite) were exposed to a varying environmental conditions including immersed systems, in equilibrium with ambient-pressure air and with CO2 at 40 degrees C and 50 degrees C; samples exposed to wet CO2 at relative humidity of 60% (40 degrees C) and 80% (50 degrees C); and wet scCO2 at 50 degrees C and 12 MPa (1750 psi). The ambient pressure conditions provide a baseline for comparison of the surface alteration for the experiments at geologically relevant temperature and pressure (1750 psi and 50 degrees C), where the mineral samples were exposed to wet scCO2 at 80% P/Psat. All samples were analyzed by SEM/EDX, and in the case of samples immersed in water, by ICP-OES. For samples prepared under ambient pressure, immersed samples showed variable degrees of pitting and secondary mineral formation. Under humid conditions, only albite showed clear evidence of surface dissolution and secondary mineral formation; the surface alteration increased with increasing RH. Immersed samples under ambient pressure show extensive pitting for both air and CO2 atmospheres, while the 1 bar CO2 atmosphere produced much less secondary mineral formation relative to the 1 bar air atmosphere. In ambient pressure systems, secondary mineral formation was localized, while samples exposed to humid scCO2 samples exhibited secondary mineralization that is widespread over the mineral surface. These results imply that wet scCO2 has a greater potential for surface alteration than samples exposed to humid CO2 at ambient pressure or those in CO2-saturated aqueous solutions. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Matteo, E AU - Bryan, C R AU - Wang, Y AU - Dewers, T A AU - Heath, J E AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H23A EP - 1315 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629941906?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Reactivity+of+reservoir-caprock+minerals+in+the+context+of+geologic+carbon+sequestration&rft.au=Matteo%2C+E%3BBryan%2C+C+R%3BWang%2C+Y%3BDewers%2C+T+A%3BHeath%2C+J+E%3BAnonymous&rft.aulast=Matteo&rft.aufirst=E&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H23A/abstracts/H23A-1315.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Parameter estimation uncertainty; comparing apples and apples? AN - 1629940136; 2014-095977 AB - Given a highly parameterized ground water model in which the conceptual model of the heterogeneity is stochastic, an ensemble of inverse calibrations from multiple starting points (MSP) provides an ensemble of calibrated parameters and follow-on transport predictions. However, the multiple calibrations are computationally expensive. Parameter estimation uncertainty can also be modeled by decomposing the parameterization into a solution space and a null space. From a single calibration (single starting point) a single set of parameters defining the solution space can be extracted. The solution space is held constant while Monte Carlo sampling of the parameter set covering the null space creates an ensemble of the null space parameter set. A recently developed null-space Monte Carlo (NSMC) method combines the calibration solution space parameters with the ensemble of null space parameters, creating sets of calibration-constrained parameters for input to the follow-on transport predictions. Here, we examine the consistency between probabilistic ensembles of parameter estimates and predictions using the MSP calibration and the NSMC approaches. A highly parameterized model of the Culebra dolomite previously developed for the WIPP project in New Mexico is used as the test case. A total of 100 estimated fields are retained from the MSP approach and the ensemble of results defining the model fit to the data, the reproduction of the variogram model and prediction of an advective travel time are compared to the same results obtained using NSMC. We demonstrate that the NSMC fields based on a single calibration model can be significantly constrained by the calibrated solution space and the resulting distribution of advective travel times is biased toward the travel time from the single calibrated field. To overcome this, newly proposed strategies to employ a multiple calibration-constrained NSMC approach (M-NSMC) are evaluated. Comparison of the M-NSMC and MSP methods suggests that M-NSMC can provide a computationally efficient and practical solution for predictive uncertainty analysis in highly nonlinear and complex subsurface flow and transport models. This material is based upon work supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Hart, D AU - Yoon, H AU - McKenna, S A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H24D EP - 05 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940136?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Parameter+estimation+uncertainty%3B+comparing+apples+and+apples%3F&rft.au=Hart%2C+D%3BYoon%2C+H%3BMcKenna%2C+S+A%3BAnonymous&rft.aulast=Hart&rft.aufirst=D&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Inverse modeling of experiments to support more realistic simulations of sorbing radionuclide transport AN - 1629938826; 2014-095944 AB - A series of adsorption, desorption, and column transport experiments were conducted to evaluate the transport of uranium (U) and neptunium (Np) through saturated volcanic tuffs. For potential high-level radioactive waste sites, these experiments demonstrate that slow radionuclide desorption processes, which are typically not accounted for in transport models implementing simple partition coefficients (Kd values), may dominate field-scale transport. A complimentary interpretive numerical model couples a simplified geochemical description of the system with transport calculations where heterogeneities are represented as an ensemble of sorption sites with characteristic adsorption and desorption rate constants that have widely varying values. Adsorption and desorption rate constants were estimated through inverse modeling such that reliable upscaled predictions of reactive transport in field settings could be simulated. The inverse modeling software, PEST, was also used to perform advanced uncertainty quantification. The multicomponent model/parameters matching the combined data sets suggest that over much longer time and distance scales the transport of U and Np under the experimental conditions would result in very little transport over field scales because even a small number of strong sorption sites will have an exaggerated retarding influence on the transport of a radionuclide plume. Modeling of combined sorption/desorption experiments and column transport experiments that involve both the measurement of column effluent breakthrough curves and the distribution of radionuclides remaining in the column at the conclusion of the experiments holds significant promise for supporting an improved approach to properly account for mineralogical heterogeneity over long time and distance scales in reactive radionuclide transport models. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Arnold, B W AU - James, S C AU - Reimus, P W AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H23E EP - 1431 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629938826?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Inverse+modeling+of+experiments+to+support+more+realistic+simulations+of+sorbing+radionuclide+transport&rft.au=Arnold%2C+B+W%3BJames%2C+S+C%3BReimus%2C+P+W%3BAnonymous&rft.aulast=Arnold&rft.aufirst=B&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - The role of water activity and capillarity in partially saturated porous media at geologic CO (sub 2) storage sites AN - 1629938667; 2014-095913 AB - The activity of water in supercritical CO (sub 2) may affect performance of geologic CO (sub 2) storage, including CO (sub 2) injectivity, and shrink-swell properties and sealing efficiency of clayey caprocks. We present a pore-scale unit cell model of water film adsorption and capillary condensation as an explicit function of water activity in supercritical CO (sub 2) . This model estimates water film configuration in slit to other pore shapes with edges and corners. With the model, we investigate water saturation in porous media in mineral-CO (sub 2) -water systems under different water activities. Maximum water activities in equilibrium with an aqueous phase are significantly less than unity due to dissolution of CO (sub 2) in water (i.e., the mole fraction of water in the aqueous phase is much less than one) and variable dissolved salt concentration. The unit cell approach is used to upscale from the single pore to the core-sample-scale, giving saturation curves as a function of water activity in the supercritical phase and the texture of the porous media. We evaluate the model and the importance of water activity through ongoing small angle neutron scattering experiments and other column experiments, which investigate shrink-swell properties and capillarity under realistic in situ stresses. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Heath, J E AU - Bryan, C R AU - Matteo, E N AU - Dewers, T A AU - Wang, Y AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H23D EP - 1397 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629938667?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+role+of+water+activity+and+capillarity+in+partially+saturated+porous+media+at+geologic+CO+%28sub+2%29+storage+sites&rft.au=Heath%2C+J+E%3BBryan%2C+C+R%3BMatteo%2C+E+N%3BDewers%2C+T+A%3BWang%2C+Y%3BAnonymous&rft.aulast=Heath&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Self-organized geodynamics of karst limestone landscapes and coupled terra rossa/bauxite formation AN - 1618132903; 2014-086005 AB - Why do flat limestones overlain by terra rossa or bauxite systematically adopt so-called karst geomorphology, which consists of sets of roughly regularly spaced wormholes, or funnels, or sinkholes, or tower karst? The idea that the funnels and sinkholes are located at the intersections of preexisting sets of subvertical fractures is untenable. New field and petrographic evidence (Merino & Banerjee, J. Geology, 2008) revealed that, rather than 'residual' or 'detrital' (the only options that have been on the table for decades), the terra rossa/bauxite clays and Al- and Fe-oxyhydroxides grow authigenically at the base of the terra rossa, replacing the underlying limestone at a generally downward-moving reaction front several centimeters thick. The clay-for-limestone replacement, which preserves solid volume (because it takes place by clay-growth-driven pressure solution of calcite), releases H+ ions. These dissolve more calcite, generating considerable leached porosity in a narrow zone that travels with the replacement front. We proposed (Merino & Banerjee, J. Geology, 2008) that the moving leached-porosity maximum created at the front could trigger the reactive-infiltration instability (Chadam et al, IMA J. Appl. Math., 1986), causing the replacement-and-leaching reaction front to become regularly fingered, with the fingers jumping in scale to funnels, these to sinks, and these, when deep enough and merged together laterally, to tower karst. This new geodynamics would account both for the world-wide association of terra rossa and bauxite with karst limestones, and for the stunning, self-organized geomorphology of karst itself. We are testing these ideas through linear stability analysis of a simplified reaction-transport system of equations and through numerical solution of the full non-linear system of reaction-transport equations applicable, including aqueous speciation. Preliminary calculations (Banerjee & Merino, J. Geology, 2011) suggest that the replacement-and-leaching front is self-accelerating. The linear stability analysis may help to delineate climatic and hydrologic conditions for the development of spatial patterns of karst landscape and to predict the spacing of the patterns. JF - American Geophysical Union Fall Meeting AU - Merino, E AU - Wang, Y AU - Banerjee, A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract NG13B EP - 1524 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618132903?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Self-organized+geodynamics+of+karst+limestone+landscapes+and+coupled+terra+rossa%2Fbauxite+formation&rft.au=Merino%2C+E%3BWang%2C+Y%3BBanerjee%2C+A%3BAnonymous&rft.aulast=Merino&rft.aufirst=E&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Elasto-plastic constitutive behavior in three lithofacies of the Cambrian Mt. Simon Sandstone, Illinois Basin, USA AN - 1612267972; 2014-081978 AB - The Mt. Simon Formation, a basal Cambrian sandstone underlying the Illinois Basin in the Central US, is a target for underground storage and waste injection which require an assessment of geomechanical behavior. The range of depositional environments, from braided streams and minor eolean features in the lower Mt Simon, to tidally-influenced near- and on-shore sands in the upper Mt. Simon, yield a heterogeneous formation with a range in porosity, permeability, and mechanical properties. We examine the experimental deformational behavior of three distinct Mt. Simon lithofacies via axisymmetric compressional testing. Initial yielding is confirmed with acoustic emissions in many of the tests and failure envelopes are determined for each lithofacies. The evolution of (assumed) isotropic elastic moduli are examined during testing by use of unload-reload cycles, which permit the separation of total measured strains into elastic and plastic (permanent) strains. The upper Mt Simon samples deform largely elastically at stresses encountered in the Illinois Basin, with very little modulus degradation. The lower Mt. Simon facies are weaker and deform plastically, with varying amounts of modulus degradation. Results are interpreted via petrographic observation of textural contrasts. This range in constitutive response is captured up to failure with a phenomenological elasto-plasticity model. Essential aspects to describe observed behavior used in the model include non-associative plasticity, stress-invariant dependent failure, an elliptical cap surface capturing shear effects on pore collapse, kinematic and isotropic hardening, nonlinear elasticity and elastic-plastic coupling, among other features. Static moduli derived from laboratory tests are compared to dynamic moduli from wellbore log response which can allow experimental results and model to be extrapolated to Mt. Simon occurrences across the basin. This work was funded in part by the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114 and by the Department of Energy Office of Electricity. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Dewers, T AU - Newell, P AU - Broome, S AU - Heath, J E AU - Bauer, S J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract T12B EP - 01 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1612267972?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Elasto-plastic+constitutive+behavior+in+three+lithofacies+of+the+Cambrian+Mt.+Simon+Sandstone%2C+Illinois+Basin%2C+USA&rft.au=Dewers%2C+T%3BNewell%2C+P%3BBroome%2C+S%3BHeath%2C+J+E%3BBauer%2C+S+J%3BAnonymous&rft.aulast=Dewers&rft.aufirst=T&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - American Geophysical Union 2012 fall meeting AN - 1612263035; 2014-080520 AB - Seismic event locations can be made more accurate and precise by computing predictions of seismic travel time through high fidelity 3D models of the wave speed in the Earth's interior. Given the variable data quality and uneven data sampling associated with this type of model, it is essential that there be a means to calculate high-quality estimates of the path-dependent variance and covariance associated with the predicted travel times of ray paths through the model. In this paper, we describe a methodology for accomplishing this by exploiting the full model covariance matrix and show examples of path-dependent travel time prediction uncertainty computed from SALSA3D, our global, seamless 3D tomographic P-velocity model. Typical global 3D models have on the order of 1/2 million nodes, so the challenge in calculating the covariance matrix is formidable: 0.9 TB storage for 1/2 of a symmetric matrix, necessitating an Out-Of-Core (OOC) blocked matrix solution technique. With our approach the tomography matrix (G which includes Tikhonov regularization terms) is multiplied by its transpose (GTG) and written in a blocked sub-matrix fashion. We employ a distributed parallel solution paradigm that solves for (GTG)-1 by assigning blocks to individual processing nodes for matrix decomposition update and scaling operations. We first find the Cholesky decomposition of GTG which is subsequently inverted. Next, we employ OOC matrix multiplication methods to calculate the model covariance matrix from (GTG)-1 and an assumed data covariance matrix. Given the model covariance matrix, we solve for the travel-time covariance associated with arbitrary ray-paths by summing the model covariance along both ray paths. Setting the paths equal and taking the square root yields the travel prediction uncertainty for the single path. JF - American Geophysical Union Fall Meeting AU - Ballard, S AU - Hipp, J R AU - Encarnacao, A AU - Young, C J AU - Begnaud, M L AU - Phillips, W S AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S41A EP - 2423 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1612263035?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=American+Geophysical+Union+2012+fall+meeting&rft.au=Ballard%2C+S%3BHipp%2C+J+R%3BEncarnacao%2C+A%3BYoung%2C+C+J%3BBegnaud%2C+M+L%3BPhillips%2C+W+S%3BAnonymous&rft.aulast=Ballard&rft.aufirst=S&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Synthesis of mesoporous palladium with tunable porosity and demonstration of its thermal stability by in situheating and environmental transmission electron microscopy AN - 1567095556; 20518062 AB - Palladium and its alloys have high-value applications as materials for high-performance hydrogen storage, chromatographic separation of hydrogen isotopes, electrocatalysis and catalysis. These materials can be formed by chemical or electrochemical reduction in a lyotropic liquid crystalline template that constrains their growth on the nanometer scale. This approach works for a variety of metals, but Pd presents special challenges due to the autocatalytic nature of its growth, which can disrupt the template structure, resulting in disordered pores. Presented herein is a scaleable synthesis that overcomes these challenges, yielding mesoporous Pd powder having pore diameters of 7 or 13 nm. Pore size control is effected by varying the size of the molecular template, polystyrene-block-polyethylene oxide. We have used heated-stage TEM for in situobservation of the materials in vacuum and in the presence of H sub(2) gas, demonstrating that both pore diameter and the chemical state of the surface play important roles in determining thermal stability. Improved stability compared to previously reported examples facilitates preparation of scalable quantities of regularly mesoporous Pd that retains porosity at the elevated temperatures required for applications in hydrogen charge/discharge and catalysis. JF - Journal of materials chemistry. A, Materials for energy and sustainability AU - Cappillino, Patrick J AU - Hattar, Khalid M AU - Clark, Blythe G AU - Hartnett, Ryan J AU - Stavila, Vitalie AU - Hekmaty, Michelle A AU - Jacobs, Benjamin W AU - Robinson, David B AD - Sandia National Laboratories; PO Box 969, Mail Stop 9291; Livermore; CA; USA; +1 925-294-6613; , drobins@sandia.gov Y1 - 2012/12// PY - 2012 DA - Dec 2012 SP - 602 EP - 610 PB - Royal Society of Chemistry VL - 1 IS - 3 SN - 2050-7488, 2050-7488 KW - Sustainability Science Abstracts KW - Metals KW - Porosity KW - Temperature KW - Hydrogen KW - Sustainability KW - Hydrogen isotopes KW - Storage KW - Energy KW - Microscopy KW - Alloys KW - Electrochemistry KW - Palladium KW - Catalysis KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567095556?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.atitle=Synthesis+of+mesoporous+palladium+with+tunable+porosity+and+demonstration+of+its+thermal+stability+by+in+situheating+and+environmental+transmission+electron+microscopy&rft.au=Cappillino%2C+Patrick+J%3BHattar%2C+Khalid+M%3BClark%2C+Blythe+G%3BHartnett%2C+Ryan+J%3BStavila%2C+Vitalie%3BHekmaty%2C+Michelle+A%3BJacobs%2C+Benjamin+W%3BRobinson%2C+David+B&rft.aulast=Cappillino&rft.aufirst=Patrick&rft.date=2012-12-01&rft.volume=1&rft.issue=3&rft.spage=602&rft.isbn=&rft.btitle=&rft.title=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.issn=20507488&rft_id=info:doi/10.1039%2Fc2ta00190j LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Number of references - 43 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Metals; Porosity; Temperature; Hydrogen; Sustainability; Hydrogen isotopes; Storage; Energy; Microscopy; Alloys; Electrochemistry; Palladium; Catalysis DO - http://dx.doi.org/10.1039/c2ta00190j ER - TY - JOUR T1 - Next generation analysis software for component evaluation; results of rotational seismometer evaluation AN - 1566816384; 2014-078005 AB - The Component Evaluation project at Sandia National Laboratories supports the Ground-based Nuclear Explosion Monitoring program by performing testing and evaluation of the components that are used in seismic and infrasound monitoring systems. In order to perform this work, Component Evaluation maintains a testing facility called the FACT (Facility for Acceptance, Calibration, and Testing) site, a variety of test bed equipment, and a suite of software tools for analyzing test data. Recently, Component Evaluation has successfully integrated several improvements to its software analysis tools and test bed equipment that have substantially improved our ability to test and evaluate components. The software tool that is used to analyze test data is called TALENT: Test and AnaLysis EvaluatioN Tool. TALENT is designed to be a single, standard interface to all test configuration, metadata, parameters, waveforms, and results that are generated in the course of testing monitoring systems. It provides traceability by capturing everything about a test in a relational database that is required to reproduce the results of that test. TALENT provides a simple, yet powerful, user interface to quickly acquire, process, and analyze waveform test data. The software tool has also been expanded recently to handle sensors whose output is proportional to rotation angle, or rotation rate. As an example of this new processing capability, we show results from testing the new ATA ARS-16 rotational seismometer. The test data was collected at the USGS ASL. Four datasets were processed: 1) 1 Hz with increasing amplitude, 2) 4 Hz with increasing amplitude, 3) 16 Hz with increasing amplitude and 4) twenty-six discrete frequencies between 0.353 Hz to 64 Hz. The results are compared to manufacture-supplied data sheets. JF - American Geophysical Union Fall Meeting AU - Hart, D M AU - Merchant, B J AU - Abbott, R E AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S51C EP - 2435 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566816384?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Next+generation+analysis+software+for+component+evaluation%3B+results+of+rotational+seismometer+evaluation&rft.au=Hart%2C+D+M%3BMerchant%2C+B+J%3BAbbott%2C+R+E%3BAnonymous&rft.aulast=Hart&rft.aufirst=D&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - SALSA3D; validating a global 3D P-velocity model of the Earth's crust and mantle for improved event location AN - 1566816003; 2014-078070 AB - We are developing a global 3D P wave velocity model of the Earth's crust and mantle using seismic tomography to assess improvement to seismic event locations obtained using high quality 3D Earth models in lieu of 1D and 2/2.5D models. We present the most recent version of SALSA3D (SAndia LoS Alamos 3D) version 1.9, and demonstrate its ability to reduce mislocations for a large set of realizations derived from a carefully chosen set of globally-distributed ground truth (GT) events. Our model is derived from the latest version of the GT catalog of P/Pn travel-time picks assembled by Los Alamos National Laboratory. For this current version, we employ more robust data quality control measures than previously used, as well as additional global GT data sources. To prevent over-weighting due to ray path redundancy and to reduce the computational burden, we cluster rays into representative rays. The model is represented using the triangular tessellation system described by Ballard et al. (2009), which incorporates variable resolution in both the geographic and radial dimensions. For our starting model, we use a simplified layer crustal model derived from the NNSA Unified model in Eurasia and Crust 2.0 model everywhere else, overlying a uniform ak135 mantle. Sufficient damping is used to reduce velocity adjustments so that ray path changes between iterations are small. We obtain proper model smoothness by using progressive grid refinement, refining the grid only in areas where the data warrant such a refinement. In previous versions, we based this refinement on velocity changes from previous model iterations. For the current version, we utilize the diagonal of the model resolution matrix to control where grid refinement occurs, resulting in more consistent and continuous areas of refinement than before. In addition to the changes in grid refinement, we also employ a more robust convergence criterion between successive grid refinements, allowing a better fit to first broader model features, then progressively to finer ones. Our approach produces a smooth, multi-resolution model with node density appropriate to both ray coverage and the velocity gradients required by the data. This scheme is computationally expensive, so we use a distributed computing framework based on the Java Parallel Processing Framework, providing us with nearly equal 400 processors. We compare the travel-time prediction and location capabilities to standard 1D and 2/2.5D models via location tests on a global event set with GT of 5 km or better. These events generally possess hundreds of Pn and P picks from which we generate different realizations of station distributions, yielding a range of azimuthal coverage and ratios of teleseismic to regional arrivals, with which we test the robustness and quality of relocation. For the current version of the model, we test using the full 3D covariance matrix to calculate path-dependent travel time uncertainty rather than standard 1D, distance-dependent uncertainty. The SALSA3D model reduces mislocation over the standard 1D ak135 model regardless of Pn to P ratio, with the improvement being most pronounced at higher azimuthal gaps. SALSA3D also reduces mislocation compared to the combined RSTT/ak135 model (2.5D - RSTT for regional phases), with SALSA3D and RSTT performing about the same when using only Pn arrivals in location tests. JF - American Geophysical Union Fall Meeting AU - Begnaud, M L AU - Ballard, S AU - Young, C J AU - Hipp, J R AU - Encarnacao, A AU - Phillips, W S AU - Chael, E P AU - Rowe, C A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract S52D EP - 02 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566816003?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=SALSA3D%3B+validating+a+global+3D+P-velocity+model+of+the+Earth%27s+crust+and+mantle+for+improved+event+location&rft.au=Begnaud%2C+M+L%3BBallard%2C+S%3BYoung%2C+C+J%3BHipp%2C+J+R%3BEncarnacao%2C+A%3BPhillips%2C+W+S%3BChael%2C+E+P%3BRowe%2C+C+A%3BAnonymous&rft.aulast=Begnaud&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Effects of fault-controlled CO2 alteration on mineralogical and geomechanical properties of reservoir and seal rocks, Crystal Geyser, Green River, Utah AN - 1560082194; 2014-067065 AB - An understanding of the coupled chemical and mechanical properties of reservoir and seal units undergoing CO2 injection is critical for modeling reservoir behavior in response to the introduction of CO2. The implementation of CO2 sequestration as a mitigation strategy for climate change requires extensive risk assessment that relies heavily on computer models of subsurface reservoirs. Numerical models are fundamentally limited by the quality and validity of their input parameters. Existing models generally lack constraints on diagenesis, failing to account for the coupled geochemical or geomechanical processes that affect reservoir and seal unit properties during and after CO2 injection. For example, carbonate dissolution or precipitation after injection of CO2 into subsurface brines may significantly alter the geomechanical properties of reservoir and seal units and thus lead to solution-enhancement or self-sealing of fractures. Acidified brines may erode and breach sealing units. In addition, subcritical fracture growth enhanced by the presence of CO2 could ultimately compromise the integrity of sealing units, or enhance permeability and porosity of the reservoir itself. Such unknown responses to the introduction of CO2 can be addressed by laboratory and field-based observations and measurements. Studies of natural analogs like Crystal Geyser, Utah are thus a critical part of CO2 sequestration research. The Little Grand Wash and Salt Wash fault systems near Green River, Utah, host many fossil and active CO2 seeps, including Crystal Geyser, serving as a faulted anticline CO2 reservoir analog. The site has been extensively studied for sequestration and reservoir applications, but less attention has been paid to the diagenetic and geomechanical aspects of the fault zone. XRD analysis of reservoir and sealing rocks collected along transects across the Little Grand Wash Fault reveal mineralogical trends in the Summerville Fm (a siltstone seal unit) with calcite and smectite increasing toward to the fault, whereas illite decreases. These trends are likely the result of CO2-related diagenesis, and similar trends are also observed in sandstone units at the site. Fracture mechanics testing of unaltered and CO2-altered sandstone and siltstone samples shows that CO2-related diagenesis, which is indicated by bleaching of the Entrada Fm, has significantly decreased the fracture resistance. The subcritical fracture index is similarly affected by alteration. These compositional and mechanical changes are expected to affect the extent, geometry, and flow properties of fracture networks in CO2 sequestration systems, and thus may significantly affect reservoir and seal performance in CO2 reservoirs. This work was funded in part by the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Major, J R AU - Eichhubl, P AU - Urquhart, A AU - Dewers, T A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract T21A EP - 2554 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560082194?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Effects+of+fault-controlled+CO2+alteration+on+mineralogical+and+geomechanical+properties+of+reservoir+and+seal+rocks%2C+Crystal+Geyser%2C+Green+River%2C+Utah&rft.au=Major%2C+J+R%3BEichhubl%2C+P%3BUrquhart%2C+A%3BDewers%2C+T+A%3BAnonymous&rft.aulast=Major&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-09-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Iodide interactions with clay minerals; batch and diffusion studies AN - 1549620182; 2014-057197 AB - Clay minerals are likely candidates to aid in nuclear waste isolation due to their low permeability, favorable swelling properties, and high cation sorption capacities. Iodine-129 is often the major driver of exposure risk from nuclear waste repositories at timescales >10,000 years. Therefore, understanding the geochemical cycling of iodine in clays is critical in developing defensible quantitative descriptions of nuclear waste disposal. Anions are not typically considered to interact with most clays as it is assumed that the fixed negative charge of clays actively repels the dissoloved anion. This is corroborated by many batch studies, but diffusion experiments in compacted clays have shown iodide retardation relative to chloride. The reasons for this are unknown; however, several possible hypotheses include: redox transformation controls on sorption behavior, complex surface charge environments due to overlapping charge domains, and sorption to ancillary minerals or weathering products. Seven different clay minerals have been examined using several techniques to chracterize the surface charge environment and iodide uptake. The use of a series of clays shifts the independent variable away from water chemistry characteristics (pH, contaminant concentration), and toward structural characteristics of clay minerals including isomorphous substitution and clay texture. Iodide uptake batch experiments were completed with the clay minerals in a range of swamping electrolytes. The results give evidence for a novel uptake mechanism involving ion pair formation and iodide concentration within nano-confined environments. These results were further tested using diffusional columns where nano-confined regimes make up a larger proportion of the total porosity. These columns were compacted to different hydrostatic pressures and saturated with different ionic compositions. Porosity distributions were characterized with a fluoride tracer. Iodide diffusion characteristics were found to be dependent on ionic composition and confining pressure. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's Nation Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Miller, A W AU - Kruichak, J AU - Mills, M AU - Wang, Y AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract V51A EP - 2763 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549620182?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Iodide+interactions+with+clay+minerals%3B+batch+and+diffusion+studies&rft.au=Miller%2C+A+W%3BKruichak%2C+J%3BMills%2C+M%3BWang%2C+Y%3BAnonymous&rft.aulast=Miller&rft.aufirst=A&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-07-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Nanogeochemistry; size-dependent mineral-fluid interface chemistry AN - 1542646633; 2014-047637 AB - Nanostructures and nanometer mineral phases, both widely present in geologic materials, can potentially affect many geochemical processes. It is known that at nanometer scales a material tends to exhibit chemical properties distinct from the corresponding bulk phase. Understanding of this size-dependent property change will help us to bridge the existing knowledge gap between the molecular level understanding and the macro-scale laboratory/field observations of a geochemical process. In this presentation, I will review of the recent progresses in nanoscience and provide a perspective on how these progresses can potentially impact geochemical studies. My presentation will be focused the following areas: (1) the characterization of nanostructures in natural systems, (2) the study of fluids and chemical species in nanoconfinement, (3) the effects of nanopores on geochemical reaction and mass transfers, and (4) the use nanostructured materials for environmental management. I will demonstrate that the nanopore confinement can significantly modify geochemical reactions in porous geologic media. As the pore size is reduced to a few nanometers, the difference between surface acidity constants of a mineral (pK2-pK1) decreases, giving rise to a higher surface charge density on a nanopore surface than that on an unconfined mineral-water interface. The change in surface acidity constants results in a shift of ion sorption edges and enhances ion sorption on nanopore surfaces. This effect causes preferential enrichment of trace elements in nanopores. I will then discuss the implications of this emergent nanometer-scale property to radionuclide transport and carbon dioxide storage in geologic media. This work was performed at Sandia National Laboratories, which is a multiprogram laboratory operated by Sandia Corporation, a Lockheed-Martin Company, for the DOE under contract DE-AC04-94AL8500. JF - American Geophysical Union Fall Meeting AU - Wang, Y AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract V54A EP - 04 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542646633?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Nanogeochemistry%3B+size-dependent+mineral-fluid+interface+chemistry&rft.au=Wang%2C+Y%3BAnonymous&rft.aulast=Wang&rft.aufirst=Y&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-07-04 N1 - CODEN - #07548 ER - TY - CPAPER T1 - Ductility of Al Alloys under Various States of Stress Triaxiality T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313122243; 6172915 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Lu, Wei-Yang AU - Jin, Helena Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Stress KW - Alloys KW - alloys UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313122243?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Ductility+of+Al+Alloys+under+Various+States+of+Stress+Triaxiality&rft.au=Lu%2C+Wei-Yang%3BJin%2C+Helena&rft.aulast=Lu&rft.aufirst=Wei-Yang&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Experimental Characterizing Size Effects of Micro-Diameter Copper Wires on Torsion Plasticity T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313122235; 6172913 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Song, Bo AU - Lu, Wei-Yang Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Copper KW - Plasticity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313122235?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Experimental+Characterizing+Size+Effects+of+Micro-Diameter+Copper+Wires+on+Torsion+Plasticity&rft.au=Song%2C+Bo%3BLu%2C+Wei-Yang&rft.aulast=Song&rft.aufirst=Bo&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Temperature-Dependent Small Strain Plasticity Behavior of 304L Stainless Steel in Glass-to-Metal Seal Applications T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313114955; 6173125 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Antoun, Bonnie AU - Chambers, Robert AU - Emery, John Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Steel KW - Seals KW - Temperature effects KW - Marine mammals KW - Stainless steel KW - Plasticity KW - Strains KW - stainless steel UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313114955?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Temperature-Dependent+Small+Strain+Plasticity+Behavior+of+304L+Stainless+Steel+in+Glass-to-Metal+Seal+Applications&rft.au=Antoun%2C+Bonnie%3BChambers%2C+Robert%3BEmery%2C+John&rft.aulast=Antoun&rft.aufirst=Bonnie&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Single Element Raman Thermometry for Increased Temperature Sensitivity and Thermal Properties Measurements T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313114673; 6172783 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Saltonstall, Christopher AU - Serrano, Justin AU - Beechem, Thomas AU - Norris, Pamela AU - Hopkins, Patrick Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Temperature effects KW - Sensitivity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313114673?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Single+Element+Raman+Thermometry+for+Increased+Temperature+Sensitivity+and+Thermal+Properties+Measurements&rft.au=Saltonstall%2C+Christopher%3BSerrano%2C+Justin%3BBeechem%2C+Thomas%3BNorris%2C+Pamela%3BHopkins%2C+Patrick&rft.aulast=Saltonstall&rft.aufirst=Christopher&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Modeling and Validation of Post Buckling Behavior in Imperfection Sensitive Annular Spherical Shells Using Zernike Polynomials T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313107635; 6173172 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Ford, Kurtis AU - Brake, Matthew Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Shells UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313107635?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Modeling+and+Validation+of+Post+Buckling+Behavior+in+Imperfection+Sensitive+Annular+Spherical+Shells+Using+Zernike+Polynomials&rft.au=Ford%2C+Kurtis%3BBrake%2C+Matthew&rft.aulast=Ford&rft.aufirst=Kurtis&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Tracking the deformation evolution of a polycrystalline material using EBSD T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313099322; 6172709 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Buchheit, Thomas AU - Clark, Blythe AU - Carroll, Jay AU - Boyce, Brad Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Deformation KW - Tracking KW - Evolution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313099322?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Tracking+the+deformation+evolution+of+a+polycrystalline+material+using+EBSD&rft.au=Buchheit%2C+Thomas%3BClark%2C+Blythe%3BCarroll%2C+Jay%3BBoyce%2C+Brad&rft.aulast=Buchheit&rft.aufirst=Thomas&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Twisted Bilayer Graphene: Altering Band Structure via misorientation and strain T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313097520; 6173218 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Beechem, Thomas AU - Ohta, Taisuke AU - Robinson, Jeremy AU - Kellogg, Gary Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Strains UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313097520?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Twisted+Bilayer+Graphene%3A+Altering+Band+Structure+via+misorientation+and+strain&rft.au=Beechem%2C+Thomas%3BOhta%2C+Taisuke%3BRobinson%2C+Jeremy%3BKellogg%2C+Gary&rft.aulast=Beechem&rft.aufirst=Thomas&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Peridigm: A New Paradigm in Computational Peridynamics T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313096264; 6173367 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Parks, Michael AU - Littlewood, David AU - Mitchell, John AU - Silling, Stewart Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Computer applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313096264?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Peridigm%3A+A+New+Paradigm+in+Computational+Peridynamics&rft.au=Parks%2C+Michael%3BLittlewood%2C+David%3BMitchell%2C+John%3BSilling%2C+Stewart&rft.aulast=Parks&rft.aufirst=Michael&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Physically-Based Single Crystal and Polycrystal Models for Low-Temperature Plasticity in BCC Metals T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313087476; 6173183 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Weinberger, Christopher AU - Battaile, Corbett AU - Lim, Hojun AU - Buchheit, Thomas AU - Holm, Elizabeth Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Metals KW - Plasticity KW - Crystals KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313087476?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Physically-Based+Single+Crystal+and+Polycrystal+Models+for+Low-Temperature+Plasticity+in+BCC+Metals&rft.au=Weinberger%2C+Christopher%3BBattaile%2C+Corbett%3BLim%2C+Hojun%3BBuchheit%2C+Thomas%3BHolm%2C+Elizabeth&rft.aulast=Weinberger&rft.aufirst=Christopher&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Thermal Conductivity Reduction in Phononic Crystals: Interplay of Coherent versus Incoherent Scattering T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313084443; 6173265 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - El-Kady, Ihab AU - Reinke, Charles AU - Su, Mehmet AU - Kim, Bongsang AU - Goettler, Drew AU - Alaie, Seyedhamidreza AU - Leseman, Zayd Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Thermal conductivity KW - Crystals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313084443?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Thermal+Conductivity+Reduction+in+Phononic+Crystals%3A+Interplay+of+Coherent+versus+Incoherent+Scattering&rft.au=El-Kady%2C+Ihab%3BReinke%2C+Charles%3BSu%2C+Mehmet%3BKim%2C+Bongsang%3BGoettler%2C+Drew%3BAlaie%2C+Seyedhamidreza%3BLeseman%2C+Zayd&rft.aulast=El-Kady&rft.aufirst=Ihab&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - The Mechanics of a Molten Salt Battery Separator Material T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313083550; 6173314 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Long, Kevin AU - Roberts, Scott AU - Roberts, Christine AU - Grillet, Anne Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Salts KW - Batteries KW - Separators UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313083550?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=The+Mechanics+of+a+Molten+Salt+Battery+Separator+Material&rft.au=Long%2C+Kevin%3BRoberts%2C+Scott%3BRoberts%2C+Christine%3BGrillet%2C+Anne&rft.aulast=Long&rft.aufirst=Kevin&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Nanoindentation and Sub-Micro-Pillar Compression Tests on Nanocrystalline Nickel Tribofilms T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313081077; 6172869 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Battaile, Corbett AU - Boyce, Brad AU - Buchheit, Thomas AU - Clark, Blythe AU - Michael, Joe AU - Prasad, Somuri AU - Weinberger, Christopher Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Nickel KW - Mechanical properties KW - Compression UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313081077?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Nanoindentation+and+Sub-Micro-Pillar+Compression+Tests+on+Nanocrystalline+Nickel+Tribofilms&rft.au=Battaile%2C+Corbett%3BBoyce%2C+Brad%3BBuchheit%2C+Thomas%3BClark%2C+Blythe%3BMichael%2C+Joe%3BPrasad%2C+Somuri%3BWeinberger%2C+Christopher&rft.aulast=Battaile&rft.aufirst=Corbett&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Investigating the role of grain boundaries during the plastic deformation of bicrystalline nanowires using molecular dynamics T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313081052; 6172868 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Tucker, Garritt AU - Aitken, Zachary AU - Greer, Julia AU - Weinberger, Christopher Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Grains KW - Deformation KW - Grain KW - nanotechnology KW - Plastics KW - Boundaries UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313081052?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Investigating+the+role+of+grain+boundaries+during+the+plastic+deformation+of+bicrystalline+nanowires+using+molecular+dynamics&rft.au=Tucker%2C+Garritt%3BAitken%2C+Zachary%3BGreer%2C+Julia%3BWeinberger%2C+Christopher&rft.aulast=Tucker&rft.aufirst=Garritt&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Calculation of the thermal conductivity of micro-scale phononic crystals using continuum mechanics and lattice dynamics T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313041864; 6171961 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Reinke, Charles AU - Su, Mehmet AU - Kim, Bongsang AU - Davis, Bruce AU - Hussein, Mahmoud AU - Leseman, Zayd AU - Olsson, III, Roy AU - El-Kady, Ihab Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Thermal conductivity KW - Crystals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313041864?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Calculation+of+the+thermal+conductivity+of+micro-scale+phononic+crystals+using+continuum+mechanics+and+lattice+dynamics&rft.au=Reinke%2C+Charles%3BSu%2C+Mehmet%3BKim%2C+Bongsang%3BDavis%2C+Bruce%3BHussein%2C+Mahmoud%3BLeseman%2C+Zayd%3BOlsson%2C+III%2C+Roy%3BEl-Kady%2C+Ihab&rft.aulast=Reinke&rft.aufirst=Charles&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Modeling Strain Localization within a Class of Finite Deformation Fully Coupled Thermo-Diffusion-Mechanical Systems T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313040533; 6171683 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Sun, Waiching AU - Ostien, Jakob AU - Foulk III, James Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Deformation KW - Strains UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313040533?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Modeling+Strain+Localization+within+a+Class+of+Finite+Deformation+Fully+Coupled+Thermo-Diffusion-Mechanical+Systems&rft.au=Sun%2C+Waiching%3BOstien%2C+Jakob%3BFoulk+III%2C+James&rft.aulast=Sun&rft.aufirst=Waiching&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Algal Photobioreactor Model for Design Optimization and Strain Selection T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313038090; 6171040 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Gharagozloo, Patricia Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Strains KW - Models KW - photobioreactors KW - Algae UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313038090?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Algal+Photobioreactor+Model+for+Design+Optimization+and+Strain+Selection&rft.au=Gharagozloo%2C+Patricia&rft.aulast=Gharagozloo&rft.aufirst=Patricia&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - A Coupled Transport and Solid Mechanics Formulation for Modeling Oxidation and Decomposition in a Uranium Hydride Bed T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313035686; 6173159 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Salloum, Maher AU - Kanouff, Mike AU - Shugard, Andrew AU - Gharagozloo, Patricia Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Oxidation KW - Uranium KW - Decomposition KW - Degradation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313035686?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=A+Coupled+Transport+and+Solid+Mechanics+Formulation+for+Modeling+Oxidation+and+Decomposition+in+a+Uranium+Hydride+Bed&rft.au=Salloum%2C+Maher%3BKanouff%2C+Mike%3BShugard%2C+Andrew%3BGharagozloo%2C+Patricia&rft.aulast=Salloum&rft.aufirst=Maher&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Exploring Grain Growth Kinematics and Plastic Deformation Mechanisms in Nanocrystalline Nickel with Microscale Metrics and Molecular Dynamics T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313035469; 6173277 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Tucker, Garritt AU - Foiles, Stephen Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Grains KW - Nickel KW - Growth rate KW - Deformation KW - Kinematics KW - Grain KW - Plastics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313035469?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Exploring+Grain+Growth+Kinematics+and+Plastic+Deformation+Mechanisms+in+Nanocrystalline+Nickel+with+Microscale+Metrics+and+Molecular+Dynamics&rft.au=Tucker%2C+Garritt%3BFoiles%2C+Stephen&rft.aulast=Tucker&rft.aufirst=Garritt&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Predicting Shape Memory Behavior of Amorphous Thermosets From a Potential Energy Clock Driven Non-Linear Viscoelastic Model T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313034431; 6172678 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Long, Kevin AU - Chambers, Robert AU - Kropka, Jamie Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Potential energy KW - Chronometers KW - viscoelasticity KW - Models KW - Memory UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313034431?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Predicting+Shape+Memory+Behavior+of+Amorphous+Thermosets+From+a+Potential+Energy+Clock+Driven+Non-Linear+Viscoelastic+Model&rft.au=Long%2C+Kevin%3BChambers%2C+Robert%3BKropka%2C+Jamie&rft.aulast=Long&rft.aufirst=Kevin&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Simulation Study of Low Temperature Bonding of Metallic Nanoparticles T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313031393; 6172887 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Chandross, Michael AU - Clark, Blythe AU - Boyle, Timothy AU - Lu, Ping Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Low temperature KW - Simulation KW - Adhesion KW - nanoparticles UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313031393?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Simulation+Study+of+Low+Temperature+Bonding+of+Metallic+Nanoparticles&rft.au=Chandross%2C+Michael%3BClark%2C+Blythe%3BBoyle%2C+Timothy%3BLu%2C+Ping&rft.aulast=Chandross&rft.aufirst=Michael&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - The Effect of the Contact Model on the Design of Mechanical Systems T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313027782; 6172244 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Brake, Matthew AU - Aragon, Dannelle AU - VanGoethem, Doug AU - Sumali, Anton Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Mechanical engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313027782?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=The+Effect+of+the+Contact+Model+on+the+Design+of+Mechanical+Systems&rft.au=Brake%2C+Matthew%3BAragon%2C+Dannelle%3BVanGoethem%2C+Doug%3BSumali%2C+Anton&rft.aulast=Brake&rft.aufirst=Matthew&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Manage MEMS/Open-Cavity Device Packaging Seal Reliability Through Simulations and Experimentations T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313026610; 6173201 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Buchheit, Thomas AU - Tandon, Rajan AU - Newton, Clay AU - Chao, Nen-Hua AU - DeAngelis, Mario Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Simulation KW - Seals KW - Packaging KW - Marine mammals KW - Microelectromechanical systems UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313026610?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Manage+MEMS%2FOpen-Cavity+Device+Packaging+Seal+Reliability+Through+Simulations+and+Experimentations&rft.au=Buchheit%2C+Thomas%3BTandon%2C+Rajan%3BNewton%2C+Clay%3BChao%2C+Nen-Hua%3BDeAngelis%2C+Mario&rft.aulast=Buchheit&rft.aufirst=Thomas&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Experimental Measurements of Rebound for the Validation of an Elastic-Plastic Contact Model T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313024008; 6170839 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Brake, Matthew AU - Aragon, Dannelle AU - Sumali, Anton AU - Bejarano, Michael AU - Reu, Phillip AU - VanGoethem, Doug Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313024008?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Experimental+Measurements+of+Rebound+for+the+Validation+of+an+Elastic-Plastic+Contact+Model&rft.au=Brake%2C+Matthew%3BAragon%2C+Dannelle%3BSumali%2C+Anton%3BBejarano%2C+Michael%3BReu%2C+Phillip%3BVanGoethem%2C+Doug&rft.aulast=Brake&rft.aufirst=Matthew&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - The Mechanics of Amorphous Polymer Networks with Reversible Cross-links T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313013699; 6171328 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Long, Kevin Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Polymers UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313013699?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=The+Mechanics+of+Amorphous+Polymer+Networks+with+Reversible+Cross-links&rft.au=Long%2C+Kevin&rft.aulast=Long&rft.aufirst=Kevin&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Multiscale Modeling of Fracture with Peridynamics T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313012557; 6171210 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Silling, Stewart Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Fractures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313012557?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Multiscale+Modeling+of+Fracture+with+Peridynamics&rft.au=Silling%2C+Stewart&rft.aulast=Silling&rft.aufirst=Stewart&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Constraining Groundwater Discharge to the Gibbon River near Norris Geyser Basin Using Dissolved Helium, Radon and Chloride in Stream Water, Yellowstone National Park, Usa T2 - 2012 Annual Meeting of the Geological Society of America AN - 1313122937; 6174435 JF - 2012 Annual Meeting of the Geological Society of America AU - Gardner, W AU - Susong, David AU - Heasler, Henry AU - Mahoney, Dan Y1 - 2012/11/04/ PY - 2012 DA - 2012 Nov 04 KW - Radon KW - National parks KW - Chloride KW - Helium KW - Streams KW - Ground water KW - Basins KW - Hot springs KW - Stream KW - River discharge UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313122937?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+Geological+Society+of+America&rft.atitle=Constraining+Groundwater+Discharge+to+the+Gibbon+River+near+Norris+Geyser+Basin+Using+Dissolved+Helium%2C+Radon+and+Chloride+in+Stream+Water%2C+Yellowstone+National+Park%2C+Usa&rft.au=Gardner%2C+W%3BSusong%2C+David%3BHeasler%2C+Henry%3BMahoney%2C+Dan&rft.aulast=Gardner&rft.aufirst=W&rft.date=2012-11-04&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+Geological+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2012AM/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Experimental Observation and Computational Analysis of Electrostatically Charged Impact Ejecta T2 - 2012 Annual Meeting of the Geological Society of America AN - 1313118624; 6175804 JF - 2012 Annual Meeting of the Geological Society of America AU - Crawford, David Y1 - 2012/11/04/ PY - 2012 DA - 2012 Nov 04 KW - Computer applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313118624?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+Geological+Society+of+America&rft.atitle=Experimental+Observation+and+Computational+Analysis+of+Electrostatically+Charged+Impact+Ejecta&rft.au=Crawford%2C+David&rft.aulast=Crawford&rft.aufirst=David&rft.date=2012-11-04&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+Geological+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2012AM/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Experimental Determination of Solubilities of Sodium Tetraborate (Borax) in Nacl Solutions to High Ionic Strengths, and Thermodynamic Model for the Na-B(Oh)3-Cl-so4 System T2 - 2012 Annual Meeting of the Geological Society of America AN - 1313117822; 6174220 JF - 2012 Annual Meeting of the Geological Society of America AU - Xiong, Yongliang AU - Kirkes, Leslie AU - Westfall, Terry AU - Olivas, Taya Y1 - 2012/11/04/ PY - 2012 DA - 2012 Nov 04 KW - Sodium chloride KW - Thermodynamics KW - Borax KW - Ionic strength KW - sodium tetraborate KW - Solubility UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313117822?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+Geological+Society+of+America&rft.atitle=Experimental+Determination+of+Solubilities+of+Sodium+Tetraborate+%28Borax%29+in+Nacl+Solutions+to+High+Ionic+Strengths%2C+and+Thermodynamic+Model+for+the+Na-B%28Oh%293-Cl-so4+System&rft.au=Xiong%2C+Yongliang%3BKirkes%2C+Leslie%3BWestfall%2C+Terry%3BOlivas%2C+Taya&rft.aulast=Xiong&rft.aufirst=Yongliang&rft.date=2012-11-04&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+Geological+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2012AM/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Thirty-Minute Total Synthesis of Microfluidic Systems and Functionalized Porous Elements via "Living" Radical Photo-Polymerization AN - 1776669205; PQ0002753925 AB - A "living" radical photo-polymerization (LRPP) technique is used to rapidly fabricate microfluidic channels and micro-patterned porous polymer monoliths. Surface-initiated LRPP is then used to functionalize porous elements in a robust one-step surface modification process. Assay-ready platforms can be fully realized in less than 30 minutes. An application relevant to clinical diagnostics is presented. JF - Advanced Healthcare Materials AU - Abhyankar, Vinay V AU - Hatch, Anson V AD - Sandia National Laboratories, Department of Biotechnology & Bioengineering, Livermore, CA 94551, USA. Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 773 EP - 778 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 1 IS - 6 SN - 2192-2640, 2192-2640 KW - Biotechnology and Bioengineering Abstracts KW - Microfluidics KW - Radicals KW - W 30910:Imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1776669205?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advanced+Healthcare+Materials&rft.atitle=Thirty-Minute+Total+Synthesis+of+Microfluidic+Systems+and+Functionalized+Porous+Elements+via+%22Living%22+Radical+Photo-Polymerization&rft.au=Abhyankar%2C+Vinay+V%3BHatch%2C+Anson+V&rft.aulast=Abhyankar&rft.aufirst=Vinay&rft.date=2012-11-01&rft.volume=1&rft.issue=6&rft.spage=773&rft.isbn=&rft.btitle=&rft.title=Advanced+Healthcare+Materials&rft.issn=21922640&rft_id=info:doi/10.1002%2Fadhm.201200127 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-04-13 N1 - SubjectsTermNotLitGenreText - Microfluidics; Radicals DO - http://dx.doi.org/10.1002/adhm.201200127 ER - TY - JOUR T1 - Verification of impact melt and vapor determination methods in CTH AN - 1447103129; 2013-084674 AB - CTH is an Eulerian shock physics analysis code with a variety of applications, including planetary impacts, e.g. [1-2], that require accurate melt and vapor representation. Verification studies allow a comparison of melt and vapor determination methods in order to better understand the strengths and limitations of using such methods. Although the ANEOS equation of state (EOS) is able to provide phase and entropy, CTH until recently was unable to pass them through to the end user. Instead, analyses used maximum pressure, P (sub max) , as a surrogate for entropy, S, or final release-state temperature, T (sub f) , to determine melt and vapor within CTH and other hydrocodes [3]. This work compares the use of methods based on P (sub max) , S, and T (sub f) to determine melt and vapor mass, and verifies the results of [3] in preparation for studying multi-dimensional, strength and porosity effects. A series of 1-D and 2-D impact calculations using CTH with ANEOS provided a comparison of melt and vapor determination methods. In the 1-D calculations, pressure, temperature, and entropy of melting for several materials and impact velocities were examined. Comparison between the P-S Hugoniots from ANEOS and the melt/vapor entropy used in Pierazzo et al.'s work verified that ANEOS and CTH are performing as expected. In the 2-D calculations, we recorded the impact melt and vapor mass determined from P (sub max) , S, and T (sub f) from several impact velocities and materials. For verification with Pierazzo et al. results, initial calculations used no strength, gravity or porosity. Melt and vapor masses recorded from the P (sub max) and T (sub f) methods agreed for most materials modeled. These results demonstrate that with a good EOS, both maximum pressure and final release temperature can be used to determine melt and vapor mass in an impact scenario. Because final release temperature can be used, multi-dimensional, strength, and porosity effects can be explored in more detail than with the Pierazzo et al. method based on P (sub max) alone. Future work will extend these properties to 3-D for better understanding of multi-dimensional effects, especially associated with impact obliquity. [1] Crawford, D. A. (2011), LPSC 42, Abs. #2112. [2] Schultz, P. H. & Wrobel (2012), K. E., JGR-Planets 117. [3] Pierazzo et al. (1997), Icarus 127. JF - Abstracts with Programs - Geological Society of America AU - Quintana, Stephanie N AU - Crawford, David AU - Schultz, Peter H AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 482 EP - 483 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - methods KW - CTH KW - materials KW - extraterrestrial geology KW - one-dimensional models KW - velocity KW - impacts KW - melts KW - two-dimensional models KW - P-T conditions KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1447103129?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Verification+of+impact+melt+and+vapor+determination+methods+in+CTH&rft.au=Quintana%2C+Stephanie+N%3BCrawford%2C+David%3BSchultz%2C+Peter+H%3BAnonymous&rft.aulast=Quintana&rft.aufirst=Stephanie&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=482&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 3 N1 - PubXState - CO N1 - Last updated - 2013-10-31 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - CTH; extraterrestrial geology; impacts; materials; melts; methods; one-dimensional models; P-T conditions; two-dimensional models; velocity ER - TY - JOUR T1 - Experimental observation and computational analysis of electrostatically charged impact ejecta AN - 1447103100; 2013-084676 AB - I have had the great privilege of knowing Pete Schultz as an advisor and mentor and as a colleague and collaborator. Here I will present work that started in my student days but continues to the present. Pete has been interested in lunar magnetic anomalies for a long time. This work grew from that. In experiments performed with Pete at the NASA Ames Vertical Gun Range, electrostatic charge separation during hypervelocity impact has been characterized for a variety of impactor and target geometries. Early time ejecta are negatively charged and impact-generated plasma, late-time ejecta and materials left in the transient cavity are positively charged. Charge separation can lead to large electrostatic fields with implications for dust motion, especially in low gravity environments. The motion of charged ejecta can create transient magnetic fields with potential implications for paleomagnetism. The experiments demonstrate that total charge separation is a function of impactor kinetic energy with a near linear mass dependence and velocity dependence proportional to v (super 2.6) . The mass dependence, especially, has significant implications for the production of magnetostatic fields during planetary-scale impacts. For example, crater scaling relations can be used to extrapolate from laboratory scale to a 100 m impact crater on the Moon, predicting a approximately 10 (super 10) V/m electric field and approximately 10 (super -4) T magnetic field (comparable to Earth's surface field) lasting for approximately 0.05 s at the crater rim. If this scaling estimate is true, the electric field is large enough to significantly perturb the motion of micron-sized dust particles even in high gravity environments. In lower gravity environments, lower field strengths from smaller impacts would have a similar effect. Computational studies using the CTH hydrocode have shown that a simple two dimensional model based on electrostatic probe theory can match the experimentally observed charge separation. We are extending the CTH model to three dimensions to refine our estimates of charge separation during planetary impacts and to directly simulate its implications for ejecta transport and paleomagnetism. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under Contract DE-AC04-94AL85000. JF - Abstracts with Programs - Geological Society of America AU - Crawford, David AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 483 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - experimental studies KW - kinetic energy KW - impact features KW - Moon KW - strength KW - paleomagnetism KW - simulation KW - ejecta KW - two-dimensional models KW - observations KW - velocity KW - impact craters KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1447103100?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Experimental+observation+and+computational+analysis+of+electrostatically+charged+impact+ejecta&rft.au=Crawford%2C+David%3BAnonymous&rft.aulast=Crawford&rft.aufirst=David&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=483&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-10-31 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - ejecta; experimental studies; impact craters; impact features; kinetic energy; Moon; observations; paleomagnetism; simulation; strength; two-dimensional models; velocity ER - TY - JOUR T1 - Impacts into porous and nonporous water ice targets AN - 1447102521; 2013-084673 AB - For many solar system bodies, impact cratering events occur in targets comprised primarily of water ice. The amount of energy spent in irreversible heating of these icy targets is of particular interest to workers looking to constrain the amount of melt and/or vaporization associated with such impacts. The prevalence of porous, low-density ice in small icy bodies (e.g., comets, Kuiper belt objects) presents an added challenge for accurate modeling of the impact process, as the crushing of pore space partitions a greater fraction of the initial impact energy into heat while simultaneously attenuating the shock wave. Recent progress in the development of water equations of state, coupled with increasingly efficient 3-D hydrocode calculations, has been used to construct careful numerical studies of melt and vapor generation for water ice targets. These studies generally rely on the pressure-entropy Hugoniot to determine the critical shock pressures for which phase changes will occur and do not include material strength effects. This approach assumes that dissipative heating is unaffected by the propagation of transverse waves through the target. However, a non-negligible role for the effects of shear heating has been supported in previous hypervelocity impact experiments. Here, we report on laboratory results for hypervelocity impacts ( approximately 5 km/s) into porous (phi approximately 0.5) and nonporous water ice. Experimental work was conducted at the NASA Ames Vertical Gun Range (AVGR) for a range of impact incidence angles. Time-resolved images of the expanding plume front allow the internal energy of the plume to be estimated; this derived energy provides a useful metric for detecting enhancements in target heating. In addition, the use of quarter-space target geometries with porous ice targets provides a detailed record of shock wave propagation through the target material. Results from these experiments will be directly compared with CTH hydrocode calculations for laboratory-scale impacts into porous and nonporous ice targets. JF - Abstracts with Programs - Geological Society of America AU - Bruck Syal, Megan AU - Schultz, Peter H AU - Crawford, David AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 482 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - water KW - solar system KW - experimental studies KW - pressure KW - three-dimensional models KW - entropy KW - porous materials KW - impacts KW - vaporization KW - melts KW - laboratory studies KW - extraterrestrial geology KW - ice KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1447102521?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Impacts+into+porous+and+nonporous+water+ice+targets&rft.au=Bruck+Syal%2C+Megan%3BSchultz%2C+Peter+H%3BCrawford%2C+David%3BAnonymous&rft.aulast=Bruck+Syal&rft.aufirst=Megan&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=482&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-10-31 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - entropy; experimental studies; extraterrestrial geology; ice; impacts; laboratory studies; melts; porous materials; pressure; solar system; three-dimensional models; vaporization; water ER - TY - JOUR T1 - Subsurface failure in spherical bodies; implications for linear features on Vesta AN - 1447102451; 2013-084669 AB - This study presents a new, time-resolved study of damage evolution in spherical targets using a combination of laboratory and numerical experiments. The comparison reveals details about subsurface failure within spherical PMMA targets: incipient spallation occurs near the surface at the farside of the target, rarefaction waves coalesce to form a central column of damage centered on the impact point antipode, and deep failure planes result from shear deformation following passage of the shock wave. The orientation of the planar damage features, the number of sub-parallel failure planes, and the location and extent of shallow hazy failure depend on impact angle. Laboratory experiments performed at the NASA Ames Vertical Gun Range (AVGR) provide a clear view of damage growth and insight about particular damage structures. Three main regions characterize the damage in experiments: the intensely fractured and spalled region surrounding the impact point; central and antipodal failure planes; and shallow, near-surface incipient spallation and shear downrange from the impact point. Numerical simulations reveal that deep failure planes result from shear deformation following passage of the shock wave. Intuition gained from the laboratory combined with small-scale numerical experiments then prompts a new interpretation of surface features observed on asteroids. Large-scale comparisons focus on the grooved terrain observed by the Dawn spacecraft at 4 Vesta. Three-dimensional CTH calculations of large, oblique impacts onto a differentiated Vesta induce damage over large regions of the subsurface. Such simulations indicate that the linear features are likely surface expressions of subsurface failure planes and faulting. A combination of tensile damage and high values of shear stress reveal that these features are consistent with shear localization in subsurface failure planes (similar to what is seen in laboratory experiments). Comparison between the orientation of damage structures in the laboratory and failure regions within Vesta can be used to constrain impact parameters for the large south-pole basins on Vesta (e.g., the impact point and impact angle). JF - Abstracts with Programs - Geological Society of America AU - Stickle, Angela M AU - Schultz, Peter H AU - Crawford, David AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 482 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - laboratory studies KW - failures KW - experimental studies KW - asteroids KW - Vesta Asteroid KW - damage KW - impacts KW - observations KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1447102451?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Subsurface+failure+in+spherical+bodies%3B+implications+for+linear+features+on+Vesta&rft.au=Stickle%2C+Angela+M%3BSchultz%2C+Peter+H%3BCrawford%2C+David%3BAnonymous&rft.aulast=Stickle&rft.aufirst=Angela&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=482&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-10-31 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - asteroids; damage; experimental studies; failures; impacts; laboratory studies; observations; Vesta Asteroid ER - TY - JOUR T1 - Distinguishing regional-scale groundwater discharge to a perennial river using a suite of environmental tracers AN - 1429841669; 2013-068719 AB - A mix of older regional groundwater and modern local groundwater was identified as the sources of baseflow for the Daly River in the Northern Territory of Australia. This study used a suite of environmental tracers to identify the location of groundwater discharge ( (super 222) Rn) and to differentiate water of different residence times (CFCs, SF (sub 6) , (super 4) He). Tracer concentrations were measured in the river, groundwater, and springs along a 60 km reach of the Daly River. At the location where a group of springs intersected the river, groundwater discharge contained elevated (super 4) He and very low concentrations of CFCs and SF (sub 6) . The group of springs is located at the terminus of an extensive dolostone aquifer, and the measured (super 4) He concentrations indicate residence times on the order of 10,000 yrs. Elevated (super 4) He in waters discharging from the springs and from a well completed deep in the geologic basin clearly indicates a regional-scale groundwater source. Upstream and downstream of the springs, the source of baseflow was composed of waters containing SF (sub 6) and CFCs from local groundwater sources adjacent to the river. Close to the river a redox fence was detected in groundwater, and reducing conditions are hypothesized to have degraded CFCs. CFC degradation could have masked the contribution of local groundwater sources without comparison with SF (sub 6) . Using the suite of environmental tracers, we conclude that 45% of baseflow originated from a regional groundwater for the 60 km river reach. This study demonstrates that in order to identify multiple sources of baseflow and waters having different residence times, multiple tracers are needed. The knowledge gained from identifying sources of baseflow and mixing between local and regional groundwater advances the conceptual understanding of water cycling in catchments. JF - Abstracts with Programs - Geological Society of America AU - Smerdon, Brian AU - Gardner, W Payton AU - Harrington, Glenn AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 154 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - Australasia KW - tracers KW - springs KW - Northern Territory Australia KW - Australia KW - Daly River KW - discharge KW - geochemistry KW - ground water KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429841669?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Distinguishing+regional-scale+groundwater+discharge+to+a+perennial+river+using+a+suite+of+environmental+tracers&rft.au=Smerdon%2C+Brian%3BGardner%2C+W+Payton%3BHarrington%2C+Glenn%3BAnonymous&rft.aulast=Smerdon&rft.aufirst=Brian&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=154&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-09-05 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Australasia; Australia; Daly River; discharge; geochemistry; ground water; Northern Territory Australia; springs; tracers ER - TY - JOUR T1 - Constraining groundwater discharge to the Gibbon River near Norris Geyser basin using dissolved helium, radon and chloride in stream water, Yellowstone National Park, USA AN - 1429841411; 2013-068722 AB - We use dissolved concentration of (super 222) Rn, (super 3) He, (super 4) He and chloride measured in stream water to identify areas of groundwater discharge to Gibbon River along a near Norris Geyser Basin in Yellowstone National Park. Dissolved noble gas, (super 222) Rn and chloride concentrations were measured synoptically at approximately 1km spacing along a approximately 35 km reach. Distinct zones of groundwater discharge can be detected by elevated (super 222) Rn and increases in chloride. Using concentrations of He, Cl and Rn observed in cool and hydrothermal groundwater in the vicinity, constraints can be placed on the volumes of cool local groundwater discharge versus hydrothermal discharge to the Gibbon River. These results have significant implications for monitoring hydrothermal discharge at the watershed scale, and for separating locally derived water from deeper-circulating, regionally derived groundwater in volcanic terrains. JF - Abstracts with Programs - Geological Society of America AU - Gardner, W Payton AU - Susong, David D AU - Heasler, Henry P AU - Mahoney, Dan AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 154 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - United States KW - halides KW - radon KW - ground water KW - Wyoming KW - Gibbon River KW - noble gases KW - Yellowstone National Park KW - chlorides KW - Norris Geyser KW - helium KW - discharge KW - geochemistry KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429841411?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Constraining+groundwater+discharge+to+the+Gibbon+River+near+Norris+Geyser+basin+using+dissolved+helium%2C+radon+and+chloride+in+stream+water%2C+Yellowstone+National+Park%2C+USA&rft.au=Gardner%2C+W+Payton%3BSusong%2C+David+D%3BHeasler%2C+Henry+P%3BMahoney%2C+Dan%3BAnonymous&rft.aulast=Gardner&rft.aufirst=W&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=154&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-09-05 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - chlorides; discharge; geochemistry; Gibbon River; ground water; halides; helium; noble gases; Norris Geyser; radon; United States; Wyoming; Yellowstone National Park ER - TY - JOUR T1 - Experimental determination of solubilities of sodium tetraborate (borax) in NaCl solutions to high ionic strengths, and thermodynamic model for the Na-B(OH)3-Cl-SO4 system AN - 1429840110; 2013-068615 AB - In this study, solubility experiments on sodium tetraborate (Na (sub 2) B (sub 4) O (sub 7) .10H (sub 2) O, borax) are conducted in NaCl solutions up to 5.0 m at room temperature (22.5 + or - 1.5 degrees C). In combination with solubility data of sodium tetraborate in Na (sub 2) SO (sub 4) solutions from literature, the solubility constant (log K) for sodium tetraborate regarding the following reaction, Na (sub 2) B (sub 4) O (sub 7) .10H (sub 2) O = 2Na (super +) + 4B(OH) (sub 4) (super -) + 2H (super +) + H (sub 2) O (l) is determined as -24.88 + or - 0.10 degrees C based on the Pitzer model. In addition, the lambda parameter (lambda (sub NaB(OH)4(aq), Na+) ) for the interaction between NaB(OH) (sub 4) (aq) and Na (super +) is evaluated as 0.09192. It is also discovered that it is necessary to revise theta (sub B(OH)4-, SO42-) of the Felmy and Weare (1986) model and include Psi (sub B(OH)4-, SO42-, Na+) in order to accurately model solubility of sodium tetraborate in Na (sub 2) SO (sub 4) medium. The revised Theta (sub B(OH)4-, SO42-) is 0.1697 in comparison with the value of -0.012 in the Felmy and Weare (1986) model, and Psi (sub B(OH)4-, SO42-, Na+) is 0.096. The model developed in this study, which incorporates NaB(OH) (sub 4) (aq), Psi (sub B(OH)4-, SO42-, Na+) and revised values for log K for sodium tetraborate and for Theta (sub B(OH)4-, SO42-') , can precisely model solubility of sodium tetraborate to high ionic strengths. The comparison of the current model with that of Felmy and Weare (1986) demonstrates that there is a significant improvement associated with the current model in predicting solubilities of sodium tetraborate in both NaCl and Na (sub 2) SO (sub 4) media. The current model is also validated by comparison of model predicted solubilities of sodium tetraborate in the mixtures of NaCl + Na (sub 2) SO (sub 4) to ionic strengths of 8.0 m with independent experimental values from the literature. The validation test indicates that the differences between solubilities predicted by the current model and experimental solubilities are less than 0.05 m with an error less than 30%. JF - Abstracts with Programs - Geological Society of America AU - Xiong, Yongliang AU - Kirkes, Leslie AU - Westfall, Terry AU - Olivas, Taya AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 136 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - models KW - experimental studies KW - Na-B(OH)3-Cl-SO4 KW - sodium tetraborate KW - borax KW - thermodynamic properties KW - solubility KW - borates KW - geochemistry KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429840110?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Experimental+determination+of+solubilities+of+sodium+tetraborate+%28borax%29+in+NaCl+solutions+to+high+ionic+strengths%2C+and+thermodynamic+model+for+the+Na-B%28OH%293-Cl-SO4+system&rft.au=Xiong%2C+Yongliang%3BKirkes%2C+Leslie%3BWestfall%2C+Terry%3BOlivas%2C+Taya%3BAnonymous&rft.aulast=Xiong&rft.aufirst=Yongliang&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=136&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-09-05 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - borates; borax; experimental studies; geochemistry; models; Na-B(OH)3-Cl-SO4; sodium tetraborate; solubility; thermodynamic properties ER - TY - JOUR T1 - Multiparameter Spectral Representation of Noise-Induced Competence in Bacillus Subtilis AN - 1257786754; 17480815 AB - In this work, the problem of representing a stochastic forward model output with respect to a large number of input parameters is considered. The methodology is applied to a stochastic reaction network of competence dynamics in Bacillus subtilis bacterium. In particular, the dependence of the competence state on rate constants of underlying reactions is investigated. We base our methodology on Polynomial Chaos (PC) spectral expansions that allow effective propagation of input parameter uncertainties to outputs of interest. Given a number of forward model training runs at sampled input parameter values, the PC modes are estimated using a Bayesian framework. As an outcome, these PC modes are described with posterior probability distributions. The resulting expansion can be regarded as an uncertain response function and can further be used as a computationally inexpensive surrogate instead of the original reaction model for subsequent analyses such as calibration or optimization studies. Furthermore, the methodology is enhanced with a classification-based mixture PC formulation that overcomes the difficulties associated with representing potentially nonsmooth input-output relationships. Finally, the global sensitivity analysis based on the multiparameter spectral representation of an observable of interest provides biological insight and reveals the most important reactions and their couplings for the competence dynamics. JF - IEEE/ACM Transactions on Computational Biology and Bioinformatics AU - Sargsyan, Khachik AU - Safta, Cosmin AU - Debusschere, Bert AU - Najm, Habib AD - Sandia National Laboratories, Livermore Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 1709 EP - 1723 PB - Institute of Electrical and Electronics Engineers, Inc., 3 Park Avenue, 17th Fl New York NY 10016-5997 United States VL - 9 IS - 6 SN - 1545-5963, 1545-5963 KW - Microbiology Abstracts B: Bacteriology; Biotechnology and Bioengineering Abstracts KW - Computer programs KW - Bacillus subtilis KW - Mathematical models KW - Bayesian analysis KW - Bioinformatics KW - Computer applications KW - Stochasticity KW - Models KW - W 30960:Bioinformatics & Computer Applications KW - J 02450:Ecology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1257786754?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=IEEE%2FACM+Transactions+on+Computational+Biology+and+Bioinformatics&rft.atitle=Multiparameter+Spectral+Representation+of+Noise-Induced+Competence+in+Bacillus+Subtilis&rft.au=Sargsyan%2C+Khachik%3BSafta%2C+Cosmin%3BDebusschere%2C+Bert%3BNajm%2C+Habib&rft.aulast=Sargsyan&rft.aufirst=Khachik&rft.date=2012-11-01&rft.volume=9&rft.issue=6&rft.spage=1709&rft.isbn=&rft.btitle=&rft.title=IEEE%2FACM+Transactions+on+Computational+Biology+and+Bioinformatics&rft.issn=15455963&rft_id=info:doi/10.1109%2FTCBB.2012.107 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-12-01 N1 - Last updated - 2016-04-13 N1 - SubjectsTermNotLitGenreText - Computer programs; Mathematical models; Bayesian analysis; Bioinformatics; Computer applications; Stochasticity; Models; Bacillus subtilis DO - http://dx.doi.org/10.1109/TCBB.2012.107 ER - TY - JOUR T1 - Thermally programmable pH buffers. AN - 1220793414; 23130670 AB - Many reactions in both chemistry and biology rely on the ability to precisely control and fix the solution concentrations of either protons or hydroxide ions. In this report, we describe the behavior of thermally programmable pH buffer systems based on the copolymerization of varying amounts of acrylic acid (AA) groups into N-isopropylacrylamide polymers. Because the copolymers undergo phase transitions upon heating and cooling, the local environment around the AA groups can be reversibly switched between hydrophobic and hydrophilic states affecting the ionization behavior of the acids. Results show that moderate temperature variations can be used to change the solution pH by two units. However, results also indicate that the nature of the transition and its impact on the pH values are highly dependent on the AA content and the degree of neutralization. JF - ACS applied materials & interfaces AU - Van Gough, Dara AU - Bunker, Bruce C AU - Roberts, Mark E AU - Huber, Dale L AU - Zarick, Holly F AU - Austin, Mariah J AU - Wheeler, Jill S AU - Moore, Diana AU - Spoerke, Erik D AD - Electronic, Optical, and Nanostructures, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA. dgough@sandia.gov Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 6247 EP - 6251 VL - 4 IS - 11 KW - Acrylamides KW - 0 KW - Acrylates KW - N-isopropylacrylamide KW - B7GFF17L9U KW - acrylic acid KW - J94PBK7X8S KW - Index Medicus KW - Materials Testing KW - Phase Transition KW - Hot Temperature KW - Acrylamides -- chemistry KW - Hydrogen-Ion Concentration KW - Acrylates -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1220793414?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+applied+materials+%26+interfaces&rft.atitle=Thermally+programmable+pH+buffers.&rft.au=Van+Gough%2C+Dara%3BBunker%2C+Bruce+C%3BRoberts%2C+Mark+E%3BHuber%2C+Dale+L%3BZarick%2C+Holly+F%3BAustin%2C+Mariah+J%3BWheeler%2C+Jill+S%3BMoore%2C+Diana%3BSpoerke%2C+Erik+D&rft.aulast=Van+Gough&rft.aufirst=Dara&rft.date=2012-11-01&rft.volume=4&rft.issue=11&rft.spage=6247&rft.isbn=&rft.btitle=&rft.title=ACS+applied+materials+%26+interfaces&rft.issn=1944-8252&rft_id=info:doi/10.1021%2Fam301836p LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-05-30 N1 - Date created - 2012-11-28 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1021/am301836p ER - TY - JOUR T1 - An examination of fuel consumption trends in construction projects AN - 1114289117; 4353121 AB - Recent estimates of fuel consumption in construction projects are highly variable. Lack of standards for reporting at both the equipment and project levels make it difficult to quantify the magnitude of fuel consumption and the associated opportunities for efficiency improvements in construction projects. In this study, we examined clusters of Environmental Impact Reports for seemingly similar construction projects in California. We observed that construction projects are not characterized consistently by task or equipment. We found wide variations in estimates for fuel use in terms of tasks, equipment, and overall projects, which may be attributed in part to inconsistencies in methodology and parameter ranges. Our analysis suggests that standardizing fuel consumption reporting and estimation methodologies for construction projects would enable quantification of opportunities for efficiency improvements at both the equipment and project levels. With increasing emphasis on reducing fossil fuel consumption, it will be important to quantify opportunities to increase fuel efficiency, including across the construction sector. All rights reserved, Elsevier JF - Energy policy AU - Peters, V A AU - Manley, D K AD - Sandia National Laboratories Y1 - 2012/11// PY - 2012 DA - Nov 2012 SP - 496 EP - 506 VL - 50 SN - 0301-4215, 0301-4215 KW - Economics KW - U.S.A. KW - California KW - Development projects KW - Energy efficiency KW - Equipment KW - Fossil fuels KW - Fuels KW - Energy consumption UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1114289117?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aibss&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+policy&rft.atitle=An+examination+of+fuel+consumption+trends+in+construction+projects&rft.au=Peters%2C+V+A%3BManley%2C+D+K&rft.aulast=Peters&rft.aufirst=V&rft.date=2012-11-01&rft.volume=50&rft.issue=&rft.spage=496&rft.isbn=&rft.btitle=&rft.title=Energy+policy&rft.issn=03014215&rft_id=info:doi/10.1016%2Fj.enpol.2012.07.048 LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2013-06-12 N1 - Last updated - 2013-09-16 N1 - SubjectsTermNotLitGenreText - 4249 2805 3872 554 971; 5336 4246; 4255 4276 4249 2805 3872 554 971; 5255 5336 4246; 3507 3502 7584 3977 5574 10472 5200; 4379; 72 433 293 14 DO - http://dx.doi.org/10.1016/j.enpol.2012.07.048 ER - TY - CPAPER T1 - Multiscale Modeling of Nanoparticle Suspensions: Rheology, Drying and Bulk Properties T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313108222; 6167334 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Bolintineanu, Dan AU - Lechman, Jeremy AU - Grest, Gary AU - Schunk, P Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Rheology KW - Drying KW - nanoparticles UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313108222?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Multiscale+Modeling+of+Nanoparticle+Suspensions%3A+Rheology%2C+Drying+and+Bulk+Properties&rft.au=Bolintineanu%2C+Dan%3BLechman%2C+Jeremy%3BGrest%2C+Gary%3BSchunk%2C+P&rft.aulast=Bolintineanu&rft.aufirst=Dan&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Thermochemical Cycle of a Mixed Metal Oxide for Augmentation of Thermal Energy Storage in Solid Particles T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313107321; 6165981 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Ehrhart, Brian AU - Siegel, Nathan AU - Coker, Eric AU - Weimer, Alan Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Particulates KW - Metals KW - Storage KW - oxides KW - Energy storage UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313107321?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Thermochemical+Cycle+of+a+Mixed+Metal+Oxide+for+Augmentation+of+Thermal+Energy+Storage+in+Solid+Particles&rft.au=Ehrhart%2C+Brian%3BSiegel%2C+Nathan%3BCoker%2C+Eric%3BWeimer%2C+Alan&rft.aulast=Ehrhart&rft.aufirst=Brian&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Highly Porous Ceramic Foams From Magnesium Oxide Stabilized Pickering Emulsions T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313106041; 6165888 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Roberts, Christine AU - Gloe, Lindsey AU - Mondy, Lisa AU - Grillet, Anne AU - Fitchett, Stephanie AU - Diantonio, Christopher AU - Chavez, Tom AU - Ingersoll, David Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Magnesium KW - Emulsions KW - Ceramics KW - oxides KW - Foams UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313106041?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Highly+Porous+Ceramic+Foams+From+Magnesium+Oxide+Stabilized+Pickering+Emulsions&rft.au=Roberts%2C+Christine%3BGloe%2C+Lindsey%3BMondy%2C+Lisa%3BGrillet%2C+Anne%3BFitchett%2C+Stephanie%3BDiantonio%2C+Christopher%3BChavez%2C+Tom%3BIngersoll%2C+David&rft.aulast=Roberts&rft.aufirst=Christine&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Multi-Phase Drop Size Distribution Determination in a Centrifugal Contactor T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313072531; 6168329 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Wyatt, Nicholas AU - O'Hern, Timothy AU - Shelden, Bion Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Size distribution KW - Body size UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313072531?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Multi-Phase+Drop+Size+Distribution+Determination+in+a+Centrifugal+Contactor&rft.au=Wyatt%2C+Nicholas%3BO%27Hern%2C+Timothy%3BShelden%2C+Bion&rft.aulast=Wyatt&rft.aufirst=Nicholas&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Atomistic Molecular Dynamics Simulations of Model Ionomers T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313018859; 6166569 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Bolintineanu, Dan AU - Stevens, Mark AU - Frischknecht, Amalie Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Simulation KW - Molecular modelling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313018859?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Atomistic+Molecular+Dynamics+Simulations+of+Model+Ionomers&rft.au=Bolintineanu%2C+Dan%3BStevens%2C+Mark%3BFrischknecht%2C+Amalie&rft.aulast=Bolintineanu&rft.aufirst=Dan&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Using excess super(4)He to quantify variability in aquitard leakage AN - 1113217314; 17235379 AB - Fluid flux through aquitards controls the rate of recharge, discharge, cross-formational fluid flow and contaminant transport in subsurface systems. In this paper, concentrations of super(4)He are used to investigate the spatial distribution of vertical fluid flux through the regionally extensive Great Artesian Basin aquitard system in northern South Australia. Two vertical profiles of super(4)He concentration in aquitard pore water, augmented with regional sampling of aquifers above and below the aquitard were used to estimate fluid flux at multiple locations over a large spatial area. 4He concentrations in the shallow aquifer above the Great Artesian Basin range from atmospheric equilibrium to 1000 times enriched over atmosphere. Fluid flux through the aquitard was estimated by fitting observed helium concentrations at each sampling site with a 1-D model of helium transport through the aquitard. Estimated fluid fluxes through the aquitard vary over three orders of magnitude across the study area. In areas of competent aquitard, fluid fluxes are less than 0.003mm/yr, and mass transport of helium is dominated by molecular diffusion. Preferential discharge zones are clearly identifiable with fluid fluxes up to 3mm/yr. Our results show that fluid flux through a regionally extensive aquitard can be highly variable at large spatial scales, and that 4He concentrations in aquifers bounding the aquitard system provide a convenient and sensitive method for investigating aquitard flux at the regional scale. JF - Journal of Hydrology (Amsterdam) AU - Gardner, WPayton AU - Harrington, Glenn A AU - Smerdon, Brian D AD - Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM, USA, wpgardn@sandia.gov Y1 - 2012/10/25/ PY - 2012 DA - 2012 Oct 25 SP - 63 EP - 75 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 468-469 SN - 0022-1694, 0022-1694 KW - Pollution Abstracts; Environment Abstracts; Aqualine Abstracts; Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts KW - Aquifers KW - Pore water KW - Spatial distribution KW - Molecular diffusion KW - Australia, South Australia KW - Pollution dispersion KW - Basins KW - Mass transport KW - Freshwater KW - Australia, Great Artesian Basin KW - Hydrologic Models KW - Ground water KW - Hydrology KW - Diffusion KW - Sampling KW - Recharge KW - Leakage KW - Aquitards KW - River discharge KW - Vertical profiles KW - Artesian Basins KW - Groundwater pollution KW - Helium KW - Groundwater KW - Fluctuations KW - Fluid flow KW - SW 5010:Network design KW - AQ 00006:Sewage KW - P 0000:AIR POLLUTION KW - M2 556.38:Groundwater Basins (556.38) KW - Q2 09171:Dynamics of lakes and rivers KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1113217314?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology+%28Amsterdam%29&rft.atitle=Using+excess+super%284%29He+to+quantify+variability+in+aquitard+leakage&rft.au=Gardner%2C+WPayton%3BHarrington%2C+Glenn+A%3BSmerdon%2C+Brian+D&rft.aulast=Gardner&rft.aufirst=WPayton&rft.date=2012-10-25&rft.volume=468-469&rft.issue=&rft.spage=63&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology+%28Amsterdam%29&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2012.08.014 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-10-01 N1 - Number of references - 1 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Molecular diffusion; Pollution dispersion; River discharge; Ground water; Hydrology; Helium; Mass transport; Fluid flow; Vertical profiles; Aquifers; Spatial distribution; Aquitards; Pore water; Leakage; Basins; Groundwater pollution; Diffusion; Recharge; Hydrologic Models; Artesian Basins; Sampling; Groundwater; Fluctuations; Australia, Great Artesian Basin; Australia, South Australia; Freshwater DO - http://dx.doi.org/10.1016/j.jhydrol.2012.08.014 ER - TY - CPAPER T1 - Validating infrasound sensor performance: Requirements, specifications, and calibration T2 - 164th Meeting of the Acoustical Society of America AN - 1313119699; 6196584 JF - 164th Meeting of the Acoustical Society of America AU - Hart, Darren AU - Whitaker, Rod AU - Parks, Harold Y1 - 2012/10/22/ PY - 2012 DA - 2012 Oct 22 KW - Sensors KW - Infrasound UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313119699?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=164th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Validating+infrasound+sensor+performance%3A+Requirements%2C+specifications%2C+and+calibration&rft.au=Hart%2C+Darren%3BWhitaker%2C+Rod%3BParks%2C+Harold&rft.aulast=Hart&rft.aufirst=Darren&rft.date=2012-10-22&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=164th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - http://acousticalsociety.org/sites/default/files/KC_fullweek.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Inverse acoustic source identification in a massively parallel finite element framework T2 - 164th Meeting of the Acoustical Society of America AN - 1313116225; 6196485 JF - 164th Meeting of the Acoustical Society of America AU - Walsh, Timothy AU - Aquino, Wilkins AU - Ridzal, Denis AU - Young, Joe Y1 - 2012/10/22/ PY - 2012 DA - 2012 Oct 22 KW - Acoustics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313116225?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=164th+Meeting+of+the+Acoustical+Society+of+America&rft.atitle=Inverse+acoustic+source+identification+in+a+massively+parallel+finite+element+framework&rft.au=Walsh%2C+Timothy%3BAquino%2C+Wilkins%3BRidzal%2C+Denis%3BYoung%2C+Joe&rft.aulast=Walsh&rft.aufirst=Timothy&rft.date=2012-10-22&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=164th+Meeting+of+the+Acoustical+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - http://acousticalsociety.org/sites/default/files/KC_fullweek.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Wave Energy Development Roadmap: Design to Commercialization T2 - OCEANS 2012 MTS/IEEE AN - 1313101148; 6173644 JF - OCEANS 2012 MTS/IEEE AU - Ruehl, Kelley AU - Bull, Diana Y1 - 2012/10/14/ PY - 2012 DA - 2012 Oct 14 KW - Wave energy KW - Marketing KW - Waves UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313101148?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=OCEANS+2012+MTS%2FIEEE&rft.atitle=Wave+Energy+Development+Roadmap%3A+Design+to+Commercialization&rft.au=Ruehl%2C+Kelley%3BBull%2C+Diana&rft.aulast=Ruehl&rft.aufirst=Kelley&rft.date=2012-10-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=OCEANS+2012+MTS%2FIEEE&rft.issn=&rft_id=info:doi/ L2 - http://www.oceans12mtsieeehamptonroads.org/docs/conference-program.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - A thermodynamic perspective of the metastability of holey sheets: the role of curvature. AN - 1040998206; 22930037 AB - Producing nanostructures with high surface area that are stable is important to accomplish sustained use of catalytic materials in practical settings. Avoiding the processes of ripening and sintering that typically hinder stability has long been recognized as a significant challenge and much research is focused on addressing these issues. In this article, we investigate a Pt nanostructure-a holey nanosheet-that exhibits high surface area and stability. The findings from lattice gas simulations produce a stability diagram that relates a critical hole diameter to sheet thickness. The stability is now addressed from a thermodynamic point of view, and, in particular, the crucial role of curvature is considered. We find that the stability of certain sized holes is due to the near zero mean curvature of the surface of the holes and of the surrounding flat sheet. Molecular dynamics simulations of Pt (using an embedded atom potential) are reported for small nanoclusters and model holes in sheets to illustrate the strong effects of curvature on thermodynamic properties such as the lowering of melting and surface melting temperatures. JF - Physical chemistry chemical physics : PCCP AU - van Swol, Frank AU - Challa, Sivakumar R AU - Shelnutt, John A AD - Sandia National Laboratories, Albuquerque, NM 87185-1411, USA. fbvansw@sandia.gov Y1 - 2012/10/14/ PY - 2012 DA - 2012 Oct 14 SP - 13309 EP - 13318 VL - 14 IS - 38 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1040998206?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Physical+chemistry+chemical+physics+%3A+PCCP&rft.atitle=A+thermodynamic+perspective+of+the+metastability+of+holey+sheets%3A+the+role+of+curvature.&rft.au=van+Swol%2C+Frank%3BChalla%2C+Sivakumar+R%3BShelnutt%2C+John+A&rft.aulast=van+Swol&rft.aufirst=Frank&rft.date=2012-10-14&rft.volume=14&rft.issue=38&rft.spage=13309&rft.isbn=&rft.btitle=&rft.title=Physical+chemistry+chemical+physics+%3A+PCCP&rft.issn=1463-9084&rft_id=info:doi/10.1039%2Fc2cp41446e LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-02-04 N1 - Date created - 2012-09-17 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1039/c2cp41446e ER - TY - JOUR T1 - Cytotoxicity and inflammation in human alveolar epithelial cells following exposure to occupational levels of gold and silver nanoparticles AN - 1171884752; 17340828 AB - While inhalation represents one of the most likely routes of exposure, the toxicity and response of nanoparticles at concentrations expected from such an exposure are not well understood. Here we characterized the in vitro response of human A549 adenocarcinomic alveolar epithelial cells following exposure to gold (AuNP) and silver (AgNP) nanoparticles at levels approximating an occupational exposure. Changes in neither oxidative stress nor cytotoxicity were significantly affected by exposure to AgNPs and AuNPs, regardless of NP type (Ag vs. Au), concentration, surface ligand (citrate or tannic acid), or size. An inflammatory response was, however, observed in response to 20 nm AgNPs and 20 nm AuNPs, where significant differences in the release of interleukin (IL)-8 but not IL-6 were observed. Additional data demonstrated that increased IL-8 secretion was strongly dependent on both nanoparticle size and concentration. Overall these data suggest that, while not acutely toxic, occupational exposure to AuNPs and AgNPs may trigger a significant inflammatory response in alveolar epithelium. Moreover, the differential responses in IL-8 and IL-6 secretion suggest that NPs may induce a response pathway that is distinct from those commonly elicited by allergens and pathogens. JF - Journal of Nanoparticle Research AU - Bachand, George D AU - Allen, Amy AU - Bachand, Marlene AU - Achyuthan, Komandoor E AU - Seagrave, Jean Clare AU - Brozik, Susan M AD - Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, NM, USA, gdbacha@sandia.gov Y1 - 2012/10// PY - 2012 DA - Oct 2012 SP - 1 EP - 10 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 14 IS - 10 SN - 1388-0764, 1388-0764 KW - Toxicology Abstracts; Health & Safety Science Abstracts KW - Interleukin 6 KW - Inhalation KW - Epithelial cells KW - Interleukin 8 KW - Oxidative stress KW - Allergens KW - Gold KW - Epithelium KW - Tannic acid KW - Occupational exposure KW - Toxicity KW - Pathogens KW - Alveoli KW - Inflammation KW - Cytotoxicity KW - Silver KW - nanoparticles KW - Citric acid KW - H 1000:Occupational Safety and Health KW - X 24350:Industrial Chemicals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1171884752?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxicologyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nanoparticle+Research&rft.atitle=Cytotoxicity+and+inflammation+in+human+alveolar+epithelial+cells+following+exposure+to+occupational+levels+of+gold+and+silver+nanoparticles&rft.au=Bachand%2C+George+D%3BAllen%2C+Amy%3BBachand%2C+Marlene%3BAchyuthan%2C+Komandoor+E%3BSeagrave%2C+Jean+Clare%3BBrozik%2C+Susan+M&rft.aulast=Bachand&rft.aufirst=George&rft.date=2012-10-01&rft.volume=14&rft.issue=10&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nanoparticle+Research&rft.issn=13880764&rft_id=info:doi/10.1007%2Fs11051-012-1212-y LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-11-01 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Inhalation; Interleukin 6; Epithelial cells; Pathogens; Toxicity; Alveoli; Interleukin 8; Inflammation; Cytotoxicity; Oxidative stress; Allergens; Gold; Epithelium; Tannic acid; nanoparticles; Silver; Occupational exposure; Citric acid DO - http://dx.doi.org/10.1007/s11051-012-1212-y ER - TY - JOUR T1 - The saturated zone hydrology of Yucca Mountain and the surrounding area, southern Nevada and adjacent areas of California, USA AN - 1151912819; 2012-101401 AB - In 2002, Yucca Mountain, Nevada, was selected as the proposed site for the U.S. high-level nuclear waste repository. Yucca Mountain lies within a large topographically closed basin, in which surface water is internally drained. Groundwater, however, can and does flow into and out of this basin at depth through a regional carbonate-rock aquifer (commonly referred to as the lower carbonate-rock aquifer). Most groundwater recharge (water infiltrating downward through the unsaturated zone into the water table) originates in the highlands north of Yucca Mountain and flows generally southward. Some groundwater discharges within the basin, as in Oasis Valley and the southern Amargosa Desert, but the ultimate discharge is in Death Valley, where water is returned to the atmosphere by evapotranspiration. Groundwater flows through a heterogeneous medium produced by a complex geologic history including both compressional and extensional tectonics. For hydrologic purposes, the rocks and alluvium are divided into 25 hydrogeologic units. Regionally, the most important unit for regional groundwater flow is composed of Paleozoic carbonate rocks, which are locally separated into two aquifers by an intervening shale. Rocks of the southwestern Nevada volcanic field form thick deposits in the northern part of the basin, and these rocks host both aquifers and confining units. The potentiometric surface of the site-scale flow system contains areas of large hydraulic gradient (as great as 0.13) and small hydraulic gradient (as small as 0.0001). Both extremes are found within the Yucca Mountain site area, where they are well constrained by numerous boreholes. At Yucca Mountain, a single borehole penetrates to the regional carbonate-rock aquifer, and, at this locality, the hydraulic head at depth is 20 m greater than in the overlying volcanic rocks. This head difference is likely widespread, as indicated by thermal highs at the groundwater table in the vicinity of block-bounding faults, where upward leakage of water from the regional carbonate-rock aquifer is postulated. Since the early 1980s, numerous two- and three-dimensional flow models have been developed to depict regional groundwater flow. A 2004 transient flow model of the Death Valley region has 16 layers and a 1500 m/side horizontal grid; it is composed of 194 rows and 160 columns. The model was first calibrated to a steady-state condition and then to transient conditions. The model matches observed flow patterns well, and it generally agrees with measured water levels except in areas of large hydraulic gradient. The regional model provides the boundary conditions for a detailed site-scale flow model. The finite-element heat and mass transfer code, FEHM v2.24, was used to simulate flow through the saturated zone at Yucca Mountain. Cells in the site-scale model are 250 m/side in the horizontal grid; it is composed of 181 rows and 121 columns. The model may use as many as 67 layers, but the framework model allows a stair-stepped ground surface, so the number of layers is variable. Layer thickness ranges from 600 m at the bottom of the model to 10 m south of Yucca Mountain. The site-scale flow model was constructed and calibrated, matching observed hydrologic data well. The site-scale flow model provides a means for assessing the hypothetical flow path for any radioactive materials originating from the proposed repository. JF - Memoir - Geological Society of America AU - Belcher, Wayne R AU - Stuckless, John S AU - James, Scott C Y1 - 2012/10// PY - 2012 DA - October 2012 SP - 73 EP - 142 PB - Geological Society of America (GSA), Boulder, CO VL - 209 SN - 0072-1069, 0072-1069 KW - United States KW - potentiometric surface KW - properties KW - Oasis Valley KW - Nye County Nevada KW - seepage KW - boundary conditions KW - ground water KW - aquifers KW - models KW - California KW - water table KW - saturated zone KW - recharge KW - movement KW - Death Valley KW - Amargosa Desert KW - hydraulic conductivity KW - discharge KW - Yucca Mountain KW - Nevada KW - faults KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1151912819?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Memoir+-+Geological+Society+of+America&rft.atitle=The+saturated+zone+hydrology+of+Yucca+Mountain+and+the+surrounding+area%2C+southern+Nevada+and+adjacent+areas+of+California%2C+USA&rft.au=Belcher%2C+Wayne+R%3BStuckless%2C+John+S%3BJames%2C+Scott+C&rft.aulast=Belcher&rft.aufirst=Wayne&rft.date=2012-10-01&rft.volume=209&rft.issue=&rft.spage=73&rft.isbn=9780813712093&rft.btitle=&rft.title=Memoir+-+Geological+Society+of+America&rft.issn=00721069&rft_id=info:doi/10.1130%2F2012.1209%2803%29 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2012-01-01 N1 - Number of references - 191 N1 - PubXState - CO N1 - Document feature - illus. incl. 11 tables, sketch maps N1 - Last updated - 2012-11-15 N1 - CODEN - GSAMAQ N1 - SubjectsTermNotLitGenreText - Amargosa Desert; aquifers; boundary conditions; California; Death Valley; discharge; faults; ground water; hydraulic conductivity; models; movement; Nevada; Nye County Nevada; Oasis Valley; potentiometric surface; properties; recharge; saturated zone; seepage; United States; water table; Yucca Mountain DO - http://dx.doi.org/10.1130/2012.1209(03) ER - TY - JOUR T1 - ACCEPTABLE SEISMIC-INDUCED RISKS PER U.S. DEPARTMENT OF ENERGY STANDARDS AT NUCLEAR FACILITIES AN - 1136541621; 17260994 AB - This paper investigates the potential impacts of the transition to the U.S. Department of Energy (DOE) Order 420.1B requirements and the criteria promulgated by the new DOE-STD-1189 on the current practice for seismic design of structures, systems, and components (SSCs). Addressed in the review is the modification of the prescribed methodology provided in ANSI/ANS-2.6-2004 by the new DOE standard. The new ANSI/ANS standards provide criteria and guidance in selecting the seismic design category (SDC) and the limit state (LS) for the SSCs that are important to safety. An unmitigated consequence analysis considering the uncertainties in estimating failure and the safety consequences of the failure may be performed to determine the SDC and the LS, which then are used to establish the level of peak ground acceleration and design response spectra. The new DOE-STD-1189 modifies the prescribed methodology provided in ANSI/ANS-2.6-2004 for calculation of unmitigated radiological dose consequence. Unmitigated consequence analysis is a procedure that has been used by the DOE for the purpose of incorporating safety in the design and operation of its nuclear facilities and is also used in 10 CFR 70, the U.S. Nuclear Regulatory Commission regulation applicable to fuel cycle facilities, and the associated Standard Review Plan (NUREG-1520). This paper identifies the iterative DOE double-pronged approach to seismic design, and a simplified example demonstrates the unmitigated seismic hazard consequence analysis. JF - Nuclear Technology AU - Dahl, James J AU - Singh, Shivi AU - Zimmerman, Marvin G AD - Sandia National Laboratory, Nuclear Safety Analysis, Albuquerque, New Mexico 87185, Shising@sandia.gov Y1 - 2012/10// PY - 2012 DA - Oct 2012 SP - 1 EP - 17 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 180 IS - 1 SN - 0029-5450, 0029-5450 KW - Risk Abstracts; Health & Safety Science Abstracts KW - USA KW - Safety engineering KW - Reviews KW - Commissions KW - Seismic activity KW - Nuclear energy KW - R2 23030:Natural hazards KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1136541621?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Technology&rft.atitle=ACCEPTABLE+SEISMIC-INDUCED+RISKS+PER+U.S.+DEPARTMENT+OF+ENERGY+STANDARDS+AT+NUCLEAR+FACILITIES&rft.au=Dahl%2C+James+J%3BSingh%2C+Shivi%3BZimmerman%2C+Marvin+G&rft.aulast=Dahl&rft.aufirst=James&rft.date=2012-10-01&rft.volume=180&rft.issue=1&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Nuclear+Technology&rft.issn=00295450&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-03-01 N1 - Number of references - 42 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Safety engineering; Reviews; Commissions; Seismic activity; Nuclear energy; USA ER - TY - JOUR T1 - e-Readers, Our Readers, and Electronic Collections: A Pilot Study at a National Laboratory Library AN - 1541990822; 201406132 AB - In 2010, the Technical Library at Sandia National Laboratories conducted a six-month pilot study to evaluate various electronic reader devices and their potential for use within the Sandia environment. Five of the most popular dedicated e-reader models on the market, as well as Apple's iPad, were evaluated for their compatibility with existing Technical Library electronic collections, largely composed of scientific and technical documents in PDF format, as well as their perceived usability by Sandia researchers. This article describes the pilot study including recommendations and suggested areas for further research. [Copyright Elsevier Inc.] JF - Serials Review AU - Pollock, Danielle E AD - Sandia National Laboratories, P.O. Box 5800 MS0899, Albuquerque, NM 87185-5820, USA Y1 - 2012/09// PY - 2012 DA - September 2012 SP - 188 EP - 193 PB - Taylor & Francis Group Ltd. VL - 38 IS - 3 SN - 0098-7913, 0098-7913 KW - Electronic books KW - iPad KW - e-Reader KW - Digital collections KW - User study KW - Evaluation KW - Electronic book readers KW - Product design KW - Special libraries KW - Government agencies KW - article KW - 5.18: ELECTRONIC MEDIA UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1541990822?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Alisa&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Serials+Review&rft.atitle=e-Readers%2C+Our+Readers%2C+and+Electronic+Collections%3A+A+Pilot+Study+at+a+National+Laboratory+Library&rft.au=Pollock%2C+Danielle+E&rft.aulast=Pollock&rft.aufirst=Danielle&rft.date=2012-09-01&rft.volume=38&rft.issue=3&rft.spage=188&rft.isbn=&rft.btitle=&rft.title=Serials+Review&rft.issn=00987913&rft_id=info:doi/10.1016%2Fj.serrev.2012.08.003 LA - English DB - Library & Information Science Abstracts (LISA) N1 - Date revised - 2014-07-01 N1 - Last updated - 2016-09-27 N1 - SubjectsTermNotLitGenreText - Government agencies; Electronic book readers; Product design; Special libraries; Evaluation DO - http://dx.doi.org/10.1016/j.serrev.2012.08.003 ER - TY - JOUR T1 - Nanotechnology policy and education AN - 1114288982; 4351627 AB - Nanotechnology has been a focal area of United States (US) Science and Technology policy since President Clinton's administration. The Unites States is investing more funds in nanotechnology research and development than any other nation. The US National Laboratory community and Sandia National Laboratories in particular is responding to their country's interest by generating exceptional Nano-based science and technology and focusing these efforts on national security and safety concerns. The United States and others are finding that the technological, safety, ethical, economic, and policy considerations centered on nanotechnology are complex and interconnected. Further, that tomorrow's decision makers need an expanded educational background for them to make optimal choices concerning nanotechnology. Sandia National Laboratories responded to this need by initiating the National Institute for Nanotechnology Engineering (NINE). NINE is prototype educational effort designed to provide an exceptional foundation for the next generation of US nanotechnology decision makers. Reprinted by permission of Springer JF - Journal of business ethics AU - Stinnett, Regan AD - Sandia National Laboratories Y1 - 2012/09// PY - 2012 DA - Sep 2012 SP - 551 EP - 552 VL - 109 IS - 4 SN - 0167-4544, 0167-4544 KW - Economics KW - Entrepreneurship KW - Research centres KW - Decision making KW - Scientific research KW - Education KW - Government policy KW - U.S.A. KW - Science and technology KW - Nanotechnology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1114288982?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aibss&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+business+ethics&rft.atitle=Nanotechnology+policy+and+education&rft.au=Stinnett%2C+Regan&rft.aulast=Stinnett&rft.aufirst=Regan&rft.date=2012-09-01&rft.volume=109&rft.issue=4&rft.spage=551&rft.isbn=&rft.btitle=&rft.title=Journal+of+business+ethics&rft.issn=01674544&rft_id=info:doi/10.1007%2Fs10551-012-1429-9 LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2013-06-12 N1 - Last updated - 2013-09-16 N1 - SubjectsTermNotLitGenreText - Nanotechnology; 4049; 4306 3872 554 971; 5574 10472; 11326 11325 12622; 3322 6071 1542 11325; 10906 10902; 11347 10902; 433 293 14 DO - http://dx.doi.org/10.1007/s10551-012-1429-9 ER - TY - JOUR T1 - Physiological effects of free fatty acid production in genetically engineered Synechococcus elongatus PCC 7942. AN - 1030077020; 22473793 AB - The direct conversion of carbon dioxide into biofuels by photosynthetic microorganisms is a promising alternative energy solution. In this study, a model cyanobacterium, Synechococcus elongatus PCC 7942, is engineered to produce free fatty acids (FFA), potential biodiesel precursors, via gene knockout of the FFA-recycling acyl-ACP synthetase and expression of a thioesterase for release of the FFA. Similar to previous efforts, the engineered strains produce and excrete FFA, but the yields are too low for large-scale production. While other efforts have applied additional metabolic engineering strategies in an attempt to boost FFA production, we focus on characterizing the engineered strains to identify the physiological effects that limit cell growth and FFA synthesis. The strains engineered for FFA-production show reduced photosynthetic yields, chlorophyll-a degradation, and changes in the cellular localization of the light-harvesting pigments, phycocyanin and allophycocyanin. Possible causes of these physiological effects are also identified. The addition of exogenous linolenic acid, a polyunsaturated FFA, to cultures of S. elongatus 7942 yielded a physiological response similar to that observed in the FFA-producing strains with only one notable difference. In addition, the lipid constituents of the cell and thylakoid membranes in the FFA-producing strains show changes in both the relative amounts of lipid components and the degree of saturation of the fatty acid side chains. These changes in lipid composition may affect membrane integrity and structure, the binding and diffusion of phycobilisomes, and the activity of membrane-bound enzymes including those involved in photosynthesis. Thus, the toxicity of unsaturated FFA and changes in membrane composition may be responsible for the physiological effects observed in FFA-producing S. elongatus 7942. These issues must be addressed to enable the high yields of FFA synthesis necessary for large-scale biofuel production. JF - Biotechnology and bioengineering AU - Ruffing, Anne M AU - Jones, Howland D T AD - Sandia National Laboratories, Department of Bioenergy and Defense Technologies, Albuquerque, NM 87185-1413, USA. aruffin@sandia.gov Y1 - 2012/09// PY - 2012 DA - September 2012 SP - 2190 EP - 2199 VL - 109 IS - 9 KW - Biofuels KW - 0 KW - Fatty Acids, Nonesterified KW - Plant Oils KW - Phycocyanin KW - 11016-15-2 KW - Index Medicus KW - Phycocyanin -- metabolism KW - Plant Oils -- metabolism KW - Phycocyanin -- analysis KW - Photosynthesis -- drug effects KW - Plant Oils -- analysis KW - Cell Membrane -- chemistry KW - Cell Membrane -- metabolism KW - Biomass KW - Metabolic Engineering -- methods KW - Fatty Acids, Nonesterified -- genetics KW - Synechococcus -- chemistry KW - Fatty Acids, Nonesterified -- biosynthesis KW - Synechococcus -- metabolism KW - Synechococcus -- drug effects KW - Synechococcus -- genetics KW - Fatty Acids, Nonesterified -- metabolism UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1030077020?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biotechnology+and+bioengineering&rft.atitle=Physiological+effects+of+free+fatty+acid+production+in+genetically+engineered+Synechococcus+elongatus+PCC+7942.&rft.au=Ruffing%2C+Anne+M%3BJones%2C+Howland+D+T&rft.aulast=Ruffing&rft.aufirst=Anne&rft.date=2012-09-01&rft.volume=109&rft.issue=9&rft.spage=2190&rft.isbn=&rft.btitle=&rft.title=Biotechnology+and+bioengineering&rft.issn=1097-0290&rft_id=info:doi/10.1002%2Fbit.24509 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-01-28 N1 - Date created - 2012-07-26 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Eur J Biochem. 1998 Feb 1;251(3):641-8 [9490036] J Bacteriol. 1994 May;176(10):2814-21 [7910602] Appl Opt. 2006 Aug 20;45(24):6283-91 [16892134] Microbiology. 2006 Sep;152(Pt 9):2529-36 [16946248] Science. 2007 Feb 9;315(5813):801-4 [17289987] Proc Natl Acad Sci U S A. 2008 Mar 11;105(10):4050-5 [18316743] J Bacteriol. 2008 May;190(10):3738-46 [18344369] Bioresour Technol. 2009 Jan;100(1):261-8 [18693011] Appl Spectrosc. 2009 Mar;63(3):271-9 [19281642] Nat Biotechnol. 2009 Dec;27(12):1177-80 [19915552] Appl Microbiol Biotechnol. 2010 Feb;85(6):1629-42 [19956944] Nature. 2010 Jan 28;463(7280):559-62 [20111002] Plant Physiol. 2010 Mar;152(3):1598-610 [20061450] Science. 2010 Jul 30;329(5991):559-62 [20671186] Bioresour Technol. 2011 Jan;102(1):159-65 [20675125] Metab Eng. 2011 Mar;13(2):169-76 [21220042] Proc Natl Acad Sci U S A. 2011 Apr 26;108(17):6905-8 [21482802] Proc Natl Acad Sci U S A. 2011 Apr 26;108(17):6899-904 [21482809] Appl Biochem Biotechnol. 2000 Spring;84-86:991-1002 [10849853] J Biol Chem. 2001 Dec 14;276(50):46830-4 [11590154] J Biol Chem. 1983 Apr 25;258(8):4759-61 [6833274] Methods Enzymol. 1987;153:215-31 [3123881] Proc Natl Acad Sci U S A. 1992 Oct 15;89(20):9959-63 [1409727] Microbiol Mol Biol Rev. 1998 Sep;62(3):667-83 [9729605] N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1002/bit.24509 ER - TY - JOUR T1 - Inconsistent impact hypotheses for the Younger Dryas AN - 1542646773; 2014-047679 JF - Proceedings of the National Academy of Sciences of the United States of America AU - Boslough, Mark Y1 - 2012/08/21/ PY - 2012 DA - 2012 Aug 21 SP - 1 PB - National Academy of Sciences, Washington, DC VL - 109 IS - 34 SN - 0027-8424, 0027-8424 KW - fragmentation KW - Quaternary KW - impact features KW - impacts KW - airbursts KW - upper Pleistocene KW - Cenozoic KW - upper Weichselian KW - Mexico KW - Weichselian KW - central Mexico KW - Pleistocene KW - Lake Cuitzeo KW - impact craters KW - Younger Dryas KW - kinetics KW - Michoacan Mexico KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542646773?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.atitle=Inconsistent+impact+hypotheses+for+the+Younger+Dryas&rft.au=Boslough%2C+Mark&rft.aulast=Boslough&rft.aufirst=Mark&rft.date=2012-08-21&rft.volume=109&rft.issue=34&rft.spage=E2241&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.issn=00278424&rft_id=info:doi/10.1073%2Fpnas.1206739109 L2 - http://www.pnas.org/content/by/year LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 3 N1 - PubXState - DC N1 - SuppNotes - For reference to original see Israde-Alcantara, I., Proceedings of the National Academy of Sciences of the United States of America, Vol. 109, No. 13, p. E738-E747, DOI: 10.1073/pnas.1110614109, 2012 N1 - Last updated - 2014-07-04 N1 - CODEN - PNASA6 N1 - SubjectsTermNotLitGenreText - airbursts; Cenozoic; central Mexico; fragmentation; impact craters; impact features; impacts; kinetics; Lake Cuitzeo; Mexico; Michoacan Mexico; Pleistocene; Quaternary; upper Pleistocene; upper Weichselian; Weichselian; Younger Dryas DO - http://dx.doi.org/10.1073/pnas.1206739109 ER - TY - JOUR T1 - Thermophilic fungi in an aridland ecosystem AN - 1765989161; PQ0002618272 AB - We report a comprehensive multi-year study of thermophilic fungi at the Sevilleta National Wildlife Refuge in central New Mexico. Recovery of thermophilic fungi from soils showed seasonal fluctuations, with greater abundance correlating with spring and summer precipitation peaks. In addition to grassland soils, we obtained and characterized isolates from grassland and riparian litter, herbivore dung and biological soil crusts. All strains belonged to either the Eurotiales or Sordariales (Chaetomiaceae). No particular substrate or microhabitat associations were detected. Molecular typing of strains revealed substantial phylogenetic diversity, eight ad hoc phylogroups across the two orders were identified and genetic diversity was present within each phylogroup. Growth tests over a range of temperatures showed substantial variation in maximum growth rates among strains and across phylogroups but consistency within phylogroups. Results demonstrated that 45-50 C represents the optimal temperature for growth of most isolates, with a dramatic decline at 60 C. Most strains grew at 60 C, albeit slowly, whereas none grew at 65 C, providing empirical confirmation that 60 C presents an evolutionary threshold for fungal growth. Our results support the hypothesis that fungal thermophily is an adaptation to transient seasonal and diurnal high temperatures, rather than simply an adaptation to specialized high-temperature environments. We note that the diversity observed among strains and the frequently confused taxonomy within these groups highlight the need for comprehensive biosystematic revision of thermophilic taxa in both orders. JF - Mycologia AU - Powell, Amy J AU - Parchert, Kylea J AU - Bustamante, Joslyn M AU - Ricken, J Bryce AU - Hutchinson, Miriam I AU - Natvig, Donald O AD - Sandia National Laboratories, Albuquerque, New Mexico 87123, ajpowel@sandia.gov Y1 - 2012/08// PY - 2012 DA - August 2012 SP - 813 EP - 825 PB - Allen Press, Inc., 810 East Tenth St. Lawrence KS 66044 United States VL - 104 IS - 4 SN - 0027-5514, 0027-5514 KW - Ecology Abstracts; Microbiology Abstracts C: Algology, Mycology & Protozoology KW - biological soil crust KW - Chaetomiaceae KW - Eurotiales KW - optimal growth temperature KW - Sordariales KW - thermophilic fungi KW - Growth rate KW - Temperature effects KW - Phylogeny KW - Litter KW - Adaptations KW - Abundance KW - Wildlife KW - Genetic diversity KW - Precipitation KW - Soil microorganisms KW - Soil KW - Grasslands KW - Thermophilic fungi KW - Herbivores KW - Typing KW - Dung KW - Microenvironments KW - Taxonomy KW - Evolution KW - D 04040:Ecosystem and Ecology Studies KW - K 03310:Genetics & Taxonomy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765989161?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mycologia&rft.atitle=Thermophilic+fungi+in+an+aridland+ecosystem&rft.au=Powell%2C+Amy+J%3BParchert%2C+Kylea+J%3BBustamante%2C+Joslyn+M%3BRicken%2C+J+Bryce%3BHutchinson%2C+Miriam+I%3BNatvig%2C+Donald+O&rft.aulast=Powell&rft.aufirst=Amy&rft.date=2012-08-01&rft.volume=104&rft.issue=4&rft.spage=813&rft.isbn=&rft.btitle=&rft.title=Mycologia&rft.issn=00275514&rft_id=info:doi/10.3852%2F11-298 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Phylogeny; Temperature effects; Growth rate; Litter; Adaptations; Wildlife; Abundance; Genetic diversity; Precipitation; Soil microorganisms; Soil; Grasslands; Thermophilic fungi; Typing; Herbivores; Dung; Microenvironments; Taxonomy; Evolution; Eurotiales; Sordariales DO - http://dx.doi.org/10.3852/11-298 ER - TY - JOUR T1 - Broadband Rayleigh-wave dispersion curve and shear-wave velocity structure for Yucca Flat, Nevada AN - 1270039220; 2013-009293 AB - The geology near a seismic source has a major effect on seismic waves recorded at distance. This can be especially true in the case of man-made explosions, due to increased geologic heterogeneity at shallow depths and interactions with the free surface. Yucca Flat (YF), a sedimentary basin on the Nevada National Security Site, has hosted hundreds of well-recorded underground nuclear tests. As such, it should be an ideal natural laboratory for the study of shallow explosions. Unfortunately, basin-wide models of such important physical properties as compressive- and shear-wave velocity are not available with sufficient fidelity to maximize the potential of the studies. We attempt to remedy this situation by creating a new shear-wave velocity model of YF. This model was generated by inverting Rayleigh-wave phase-velocity dispersion measurements. Because no single dataset provided a dispersion curve of the necessary frequency bandwidth for shallow, intermediate, and deep basin depths simultaneously, we combined three dispersion curves with complementary bandwidths from three data sources. The datasets, in order of low frequency to high, were (1) underground nuclear tests at YF, recorded on regional seismic networks (0.14-0.4 Hz); (2) a multimode spatially averaged coherency microtremor array located on YF (0.2-20 Hz); and (3) several refraction microtremor (ReMi) linear arrays, also on YF (2.5-50 Hz). Compared to previous work, our model is characterized by slower velocities. The known geologic boundaries such as the depth of the basin and water table are prominent at reasonable locations. JF - Bulletin of the Seismological Society of America AU - Schramm, Kimberly A AU - Abbott, Robert E AU - Asten, Michael AU - Bilek, Susan AU - Pancha, Aasha AU - Patton, Howard J Y1 - 2012/08// PY - 2012 DA - August 2012 SP - 1361 EP - 1372 PB - Seismological Society of America, Berkeley, CA VL - 102 IS - 4 SN - 0037-1106, 0037-1106 KW - United States KW - elastic waves KW - frequency KW - seismic sources KW - surface waves KW - ground truth KW - seismicity KW - crosscorrelation KW - Yucca Flat KW - algorithms KW - nuclear explosions KW - Nevada KW - seismograms KW - body waves KW - guided waves KW - explosions KW - statistical analysis KW - Rayleigh waves KW - depth KW - boreholes KW - velocity structure KW - ground motion KW - seismic waves KW - wave dispersion KW - seismic networks KW - earthquakes KW - S-waves KW - arrays KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270039220?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Seismological+Society+of+America&rft.atitle=Broadband+Rayleigh-wave+dispersion+curve+and+shear-wave+velocity+structure+for+Yucca+Flat%2C+Nevada&rft.au=Schramm%2C+Kimberly+A%3BAbbott%2C+Robert+E%3BAsten%2C+Michael%3BBilek%2C+Susan%3BPancha%2C+Aasha%3BPatton%2C+Howard+J&rft.aulast=Schramm&rft.aufirst=Kimberly&rft.date=2012-08-01&rft.volume=102&rft.issue=4&rft.spage=1361&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.issn=00371106&rft_id=info:doi/10.1785%2F0120110296 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 25 N1 - PubXState - CA N1 - Document feature - illus. incl. 4 tables, sketch maps N1 - Last updated - 2013-01-17 N1 - CODEN - BSSAAP N1 - SubjectsTermNotLitGenreText - algorithms; arrays; body waves; boreholes; crosscorrelation; depth; earthquakes; elastic waves; explosions; frequency; ground motion; ground truth; guided waves; Nevada; nuclear explosions; Rayleigh waves; S-waves; seismic networks; seismic sources; seismic waves; seismicity; seismograms; statistical analysis; surface waves; United States; velocity structure; wave dispersion; Yucca Flat DO - http://dx.doi.org/10.1785/0120110296 ER - TY - JOUR T1 - Molecular models of birnessite and related hydrated layered minerals AN - 1039338392; 2012-079918 AB - Birnessite and other charged layered manganese oxide minerals exhibit interlayers with variable cation-water behavior that controls many environmentally important cation exchange, adsorption, and redox processes. The occurrence of birnessite phases as fine-grained materials with corresponding high-surface areas makes them effective in controlling soil sediment and groundwater compositions, but difficult to structurally characterize using conventional analytical methods. Molecular simulations provide an alternative approach in which many details of bulk and interlayer structure can be ascertained to supplement and interpret the experimental findings. Classical and electronic structure methods are used to evaluate Na-, K-, and Ba-birnessite phases. Computational results compare favorably with structures obtained by synchrotron X-ray diffraction and difference electron Fourier mapping of the interlayer region. Based on the analysis of the 1 ns atomic trajectories, dynamics of water molecules is enhanced in the interlayer of K-birnessite relative to the limited motion of water molecules and cations in the other birnessite phases. Molecular dynamics simulations of rancieite, a complex layered manganese oxide having octahedral vacancies, indicate multiple sites for Ca (super 2+) in the interlayer. In addition to manganese layer charge and layer structure, the hydration enthalpy for the interlayer cation affects the structure and dynamics of the interlayer in birnessite minerals. JF - American Mineralogist AU - Cygan, Randall T AU - Post, Jeffrey E AU - Heaney, Peter J AU - Kubicki, James D Y1 - 2012/08// PY - 2012 DA - August 2012 SP - 1505 EP - 1514 PB - Mineralogical Society of America, Washington, DC VL - 97 IS - 8-9 SN - 0003-004X, 0003-004X KW - calcium KW - alkaline earth metals KW - X-ray diffraction data KW - density functional theory KW - crystal structure KW - manganese KW - synchrotron radiation KW - hydration KW - rancieite KW - enthalpy KW - birnessite KW - metals KW - water of crystallization KW - oxides KW - molecular dynamics KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1039338392?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Mineralogist&rft.atitle=Molecular+models+of+birnessite+and+related+hydrated+layered+minerals&rft.au=Cygan%2C+Randall+T%3BPost%2C+Jeffrey+E%3BHeaney%2C+Peter+J%3BKubicki%2C+James+D&rft.aulast=Cygan&rft.aufirst=Randall&rft.date=2012-08-01&rft.volume=97&rft.issue=8-9&rft.spage=1505&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam.2012.3957 L2 - http://ammin.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2012-01-01 N1 - Number of references - 63 N1 - PubXState - DC N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2012-09-14 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - alkaline earth metals; birnessite; calcium; crystal structure; density functional theory; enthalpy; hydration; manganese; metals; molecular dynamics; oxides; rancieite; synchrotron radiation; water of crystallization; X-ray diffraction data DO - http://dx.doi.org/10.2138/am.2012.3957 ER - TY - JOUR T1 - MOVING RADIATION PROTECTION TO A MORE SCIENCE-BASED FOUNDATION: A CALL TO ACTION! AN - 1032892126; 16966827 AB - We have debated for decades whether the Linear Non-Threshold Theory (LNT) has a scientific basis for low-dose or low-dose-rate radiation exposure. There are very significant costs associated with basing the practice of our profession on the paradigm. The costs are not only financial but psychological and social. Yet, for all of our agonizing over the issue as individuals and a Society, we have generally chosen not to confront it head-on. We do not all need to be in agreement with regard to the validity of LNT to move to a science-based foundation for radiation protection. This paper outlines the problem (including the confusing U.S. regulatory structure), and proposes a path forward to enable us to safely use radioactive materials for the benefit of mankind, and to further the science and practice of radiation safety. JF - Health Physics AU - Miller, M AU - Meyer, H AU - Johnson, J AD - Sandia National Laboratories, Albuquerque, NM 87185, USA Y1 - 2012/08// PY - 2012 DA - Aug 2012 SP - 1 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 103 IS - 2 SN - 0017-9078, 0017-9078 KW - Pollution Abstracts; Health & Safety Science Abstracts KW - USA KW - Psychology KW - Radioactive materials KW - H 8000:Radiation Safety/Electrical Safety KW - P 8000:RADIATION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1032892126?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Health+Physics&rft.atitle=MOVING+RADIATION+PROTECTION+TO+A+MORE+SCIENCE-BASED+FOUNDATION%3A+A+CALL+TO+ACTION%21&rft.au=Miller%2C+M%3BMeyer%2C+H%3BJohnson%2C+J&rft.aulast=Miller&rft.aufirst=M&rft.date=2012-08-01&rft.volume=103&rft.issue=2&rft.spage=S67&rft.isbn=&rft.btitle=&rft.title=Health+Physics&rft.issn=00179078&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-08-01 N1 - Last updated - 2015-08-05 N1 - SubjectsTermNotLitGenreText - Psychology; Radioactive materials; USA ER - TY - JOUR T1 - Bayesian reconstruction of binary media with unresolved fine-scale spatial structures AN - 1028033677; 16881405 AB - We present a Bayesian technique to estimate the fine-scale properties of a binary medium from multiscale observations. The binary medium of interest consists of spatially varying proportions of low and high permeability material with an isotropic structure. Inclusions of one material within the other are far smaller than the domain sizes of interest, and thus are never explicitly resolved. We consider the problem of estimating the spatial distribution of the inclusion proportion, F(x), and a characteristic length-scale of the inclusions, delta , from sparse multiscale measurements. The observations consist of coarse-scale (of the order of the domain size) measurements of the effective permeability of the medium (i.e., static data) and tracer breakthrough times (i.e., dynamic data), which interrogate the fine scale, at a sparsely distributed set of locations. This ill-posed problem is regularized by specifying a Gaussian process model for the unknown field F(x) and expressing it as a superposition of Karhunen-Loeve modes. The effect of the fine-scale structures on the coarse-scale effective permeability i.e., upscaling, is performed using a subgrid-model which includes delta as one of its parameters. A statistical inverse problem is posed to infer the weights of the Karhunen-Loeve modes and delta , which is then solved using an adaptive Markov Chain Monte Carlo method. The solution yields non-parametric distributions for the objects of interest, thus providing most probable estimates and uncertainty bounds on latent structures at coarse and fine scales. The technique is tested using synthetic data. The individual contributions of the static and dynamic data to the inference are also analyzed. JF - Advances in Water Resources AU - Ray, J AU - McKenna, SA AU - van Bloemen Waanders, B AU - Marzouk, Y M AD - MS 9159, P.O. Box 969, Sandia National Laboratories, Livermore, CA 94550-0969, United States, jairay@sandia.gov Y1 - 2012/08// PY - 2012 DA - Aug 2012 SP - 1 EP - 19 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 44 SN - 0309-1708, 0309-1708 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts; Water Resources Abstracts; Aqualine Abstracts KW - Monte Carlo simulation KW - Spatial distribution KW - Statistical analysis KW - Water resources KW - Monte Carlo method KW - Monte Carlo Method KW - Spatial Distribution KW - Permeability KW - Tracers KW - Yield KW - Weight KW - Model Studies KW - Markov Process KW - SW 5010:Network design KW - AQ 00006:Sewage KW - Q2 09391:Tools, rigging and deck machinery KW - M2 551.5:General (551.5) KW - ENA 16:Renewable Resources-Water UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1028033677?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=Bayesian+reconstruction+of+binary+media+with+unresolved+fine-scale+spatial+structures&rft.au=Ray%2C+J%3BMcKenna%2C+SA%3Bvan+Bloemen+Waanders%2C+B%3BMarzouk%2C+Y+M&rft.aulast=Ray&rft.aufirst=J&rft.date=2012-08-01&rft.volume=44&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/10.1016%2Fj.advwatres.2012.04.009 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-07-01 N1 - Number of references - 4 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Tracers; Permeability; Statistical analysis; Water resources; Spatial distribution; Monte Carlo method; Monte Carlo simulation; Yield; Markov Process; Weight; Spatial Distribution; Monte Carlo Method; Model Studies DO - http://dx.doi.org/10.1016/j.advwatres.2012.04.009 ER - TY - JOUR T1 - Microfluidically-unified cell culture, sample preparation, imaging and flow cytometry for measurement of cell signaling pathways with single cell resolution AN - 1399913504; 17023069 AB - We have developed a microfluidic platform that enables, in one experiment, monitoring of signaling events spanning multiple time-scales and cellular locations through seamless integration of cell culture, stimulation and preparation with downstream analysis. A combination of two single-cell resolution techniques-on-chip multi-color flow cytometry and fluorescence imaging provides multiplexed and orthogonal data on cellular events. Automated, microfluidic operation allows quantitatively- and temporally-precise dosing leading to fine time-resolution and improved reproducibility of measurements. The platform was used to profile the toll-like receptor (TLR4) pathway in macrophages challenged with lipopolysaccharide (LPS)-beginning with TLR4 receptor activation by LPS, through intracellular MAPK signaling, RelA/p65 translocation in real time, to TNF- alpha cytokine production, all in one small macrophage population (< 5000 cells) while using minute reagent volume (540 nL/condition). The platform is easily adaptable to many cell types including primary cells and provides a generic platform for profiling signaling pathways. JF - Lab On a Chip AU - Wu, Meiye AU - Perroud, Thomas D AU - Srivastava, Nimisha AU - Branda, Catherine S AU - Sale, Kenneth L AU - Carson, Bryan D AU - Patel, Kamlesh D AU - Branda, Steven S AU - Singh, Anup K AD - Biotechnology and Bioengineering Department; Sandia National Laboratory; P.O. Box 969; Livermore; CA; 94551; United States; 925-294-1260; , aksingh@sandia.gov Y1 - 2012/07// PY - 2012 DA - Jul 2012 SP - 2823 EP - 2831 PB - The Royal Society of Chemistry, Thomas Graham House, Milton Road Cambridge CB4 0WF United Kingdom VL - 12 IS - 16 SN - 1473-0197, 1473-0197 KW - Biotechnology and Bioengineering Abstracts KW - Cell culture KW - Signal transduction KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1399913504?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Lab+On+a+Chip&rft.atitle=Microfluidically-unified+cell+culture%2C+sample+preparation%2C+imaging+and+flow+cytometry+for+measurement+of+cell+signaling+pathways+with+single+cell+resolution&rft.au=Wu%2C+Meiye%3BPerroud%2C+Thomas+D%3BSrivastava%2C+Nimisha%3BBranda%2C+Catherine+S%3BSale%2C+Kenneth+L%3BCarson%2C+Bryan+D%3BPatel%2C+Kamlesh+D%3BBranda%2C+Steven+S%3BSingh%2C+Anup+K&rft.aulast=Wu&rft.aufirst=Meiye&rft.date=2012-07-01&rft.volume=12&rft.issue=16&rft.spage=2823&rft.isbn=&rft.btitle=&rft.title=Lab+On+a+Chip&rft.issn=14730197&rft_id=info:doi/10.1039%2Fc2lc40344g LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-07-01 N1 - Number of references - 1 N1 - Last updated - 2014-02-21 N1 - SubjectsTermNotLitGenreText - Signal transduction DO - http://dx.doi.org/10.1039/c2lc40344g ER - TY - JOUR T1 - NAPL source zone depletion model and its application to railroad-tank-car spills AN - 1112673445; 2012-088486 AB - We developed a new semi-analytical source zone depletion model (SZDM) for multicomponent light nonaqueous phase liquids (LNAPLs) and incorporated this into an existing screening model for estimating cleanup times for chemical spills from railroad tank cars that previously considered only single-component LNAPLs. Results from the SZDM compare favorably to those from a three-dimensional numerical model, and from another semi-analytical model that does not consider source zone depletion. The model was used to evaluate groundwater contamination and cleanup times for four complex mixtures of concern in the railroad industry. Among the petroleum hydrocarbon mixtures considered, the cleanup time of diesel fuel was much longer than E95, gasoline, and crude oil. This is mainly due to the high fraction of low solubility components in diesel fuel. The results demonstrate that the updated screening model with the newly developed SZDM is computationally efficient, and provides valuable comparisons of cleanup times that can be used in assessing the health and financial risk associated with chemical mixture spills from railroad-tank-car accidents. Abstract Copyright (2011), National Ground Water Association. JF - Ground Water AU - Marruffo, Amanda AU - Yoon, Hongkyu AU - Schaeffer, David J AU - Barkan, Christopher P L AU - Saat, Mohd Rapik AU - Werth, Charles J Y1 - 2012/07// PY - 2012 DA - July 2012 SP - 627 EP - 632 PB - Wiley-Blackwell on behalf of National Ground Water Association, Westerville, OH VL - 50 IS - 4 SN - 0017-467X, 0017-467X KW - pollutants KW - pollution KW - light nonaqueous phase liquids KW - petroleum products KW - cost KW - ground water KW - nonaqueous phase liquids KW - models KW - environmental management KW - organic compounds KW - railroads KW - soil pollution KW - oil spills KW - mathematical methods KW - hydrocarbons KW - water pollution KW - roads KW - public health KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1112673445?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ground+Water&rft.atitle=NAPL+source+zone+depletion+model+and+its+application+to+railroad-tank-car+spills&rft.au=Marruffo%2C+Amanda%3BYoon%2C+Hongkyu%3BSchaeffer%2C+David+J%3BBarkan%2C+Christopher+P+L%3BSaat%2C+Mohd+Rapik%3BWerth%2C+Charles+J&rft.aulast=Marruffo&rft.aufirst=Amanda&rft.date=2012-07-01&rft.volume=50&rft.issue=4&rft.spage=627&rft.isbn=&rft.btitle=&rft.title=Ground+Water&rft.issn=0017467X&rft_id=info:doi/10.1111%2Fj.1745-6584.2011.00863.x L2 - http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1745-6584 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2012-01-01 N1 - Number of references - 24 N1 - PubXState - OH N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2016-10-25 N1 - CODEN - GRWAAP N1 - SubjectsTermNotLitGenreText - cost; environmental management; ground water; hydrocarbons; light nonaqueous phase liquids; mathematical methods; models; nonaqueous phase liquids; oil spills; organic compounds; petroleum products; pollutants; pollution; public health; railroads; roads; soil pollution; water pollution DO - http://dx.doi.org/10.1111/j.1745-6584.2011.00863.x ER - TY - JOUR T1 - Parametric analysis of technology and policy tradeoffs for conventional and electric light-duty vehicles AN - 1019879236; 4301549 AB - A parametric analysis is used to examine the supply demand interactions between the US light-duty vehicle (LDV) fleet, its fuels, and the corresponding primary energy sources through 2050. The analysis emphasizes competition between conventional internal combustion engine (ICE) vehicles, including hybrids, and electric vehicles (EVs), represented by both plug-in hybrid and battery electric vehicles. We find that EV market penetration could double relative to our baseline case with policies to extend consumers' effective payback period to 7 years. EVs can also reduce per vehicle petroleum consumption by up to 5% with opportunities to increase that fraction at higher adoption rates. However, EVs have limited ability to reduce LDV greenhouse gas (GHG) emissions with the current energy source mix. Alone, EVs cannot drive compliance with the most aggressive GHG emission reduction targets, even if the electricity grid shifts towards natural gas powered sources. Since ICEs will dominate the LDV fleet for up to 40 years, conventional vehicle efficiency improvements have the greatest potential for reductions in LDV GHG emissions and petroleum consumption over this time. Specifically, achieving fleet average efficiencies of 72mpg or greater can reduce average GHG emissions by 70% and average petroleum consumption by 81%. All rights reserved, Elsevier JF - Energy policy AU - Barter, Garrett E AU - Reichmuth, D AU - Westbrook, J AU - Malczynski, L A AU - West, T H AU - Manley, D K AU - Guzman, K D AU - Edwards, D M AD - Sandia National Laboratories Y1 - 2012/07// PY - 2012 DA - Jul 2012 SP - 473 EP - 488 VL - 46 SN - 0301-4215, 0301-4215 KW - Economics KW - Energy efficiency KW - Petrol KW - Energy policy KW - Automobile industry KW - Alternative technology KW - Greenhouse effect KW - Energy consumption KW - Carbon emissions KW - Supply and demand UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1019879236?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aibss&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+policy&rft.atitle=Parametric+analysis+of+technology+and+policy+tradeoffs+for+conventional+and+electric+light-duty+vehicles&rft.au=Barter%2C+Garrett+E%3BReichmuth%2C+D%3BWestbrook%2C+J%3BMalczynski%2C+L+A%3BWest%2C+T+H%3BManley%2C+D+K%3BGuzman%2C+K+D%3BEdwards%2C+D+M&rft.aulast=Barter&rft.aufirst=Garrett&rft.date=2012-07-01&rft.volume=46&rft.issue=&rft.spage=473&rft.isbn=&rft.btitle=&rft.title=Energy+policy&rft.issn=03014215&rft_id=info:doi/10.1016%2Fj.enpol.2012.04.013 LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2013-06-12 N1 - Last updated - 2013-09-16 N1 - SubjectsTermNotLitGenreText - 12402 4025 3934; 1418 6431; 5625 5515 2382 2381 8560 9511 4309 4313; 4261 5574 10472; 4255 4276 4249 2805 3872 554 971; 936 12622; Carbon emissions; 9450 9451; 4249 2805 3872 554 971 DO - http://dx.doi.org/10.1016/j.enpol.2012.04.013 ER - TY - JOUR T1 - Digital elevation model uncertainty and hazard analysis using a geophysical flow model AN - 1112668749; 2012-091747 AB - This paper describes a new methodology to quantify the variation in the output of a computational fluid dynamics model for block and ash flows, when the digital elevation model (DEM) of the terrain and other inputs are given as a range of possible values with a prescribed uncertainty. Integrating these variations in the possible flows as a function of input uncertainties provides well-defined hazard probabilities at specific locations, i.e. a hazard map. Earlier work provided a methodology for assessing hazards based on variations in flow initiation and friction parameters. This paper extends this approach to include the effect of terrain error and uncertainty. The results are based on potential flows at Mammoth Mountain, CA, and Galeras Volcano, Colombia. The analysis establishes the soundness of the approach and the effect of including the uncertainty in DEMs in the construction of probabilistic hazard maps. JF - Proceedings - Royal Society. Mathematical, Physical and Engineering Sciences AU - Stefanescu, E R AU - Bursik, M AU - Cordoba, G AU - Dalbey, K AU - Jones, M D AU - Patra, A K AU - Pieri, D C AU - Pitman, E B AU - Sheridan, M F Y1 - 2012/06/08/ PY - 2012 DA - 2012 Jun 08 SP - 1543 EP - 1563 PB - Royal Society of London, London VL - 468 IS - 2142 SN - 1364-5021, 1364-5021 KW - United States KW - Andes KW - numerical models KW - geologic hazards KW - digital terrain models KW - debris flows KW - Colombia KW - Galeras KW - case studies KW - California KW - South America KW - volcanic risk KW - TITAN2D model KW - pyroclastic flows KW - mass movements KW - digital simulation KW - natural hazards KW - Mammoth Mountain KW - volcanoes KW - risk assessment KW - uncertainty KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1112668749?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+-+Royal+Society.+Mathematical%2C+Physical+and+Engineering+Sciences&rft.atitle=Digital+elevation+model+uncertainty+and+hazard+analysis+using+a+geophysical+flow+model&rft.au=Stefanescu%2C+E+R%3BBursik%2C+M%3BCordoba%2C+G%3BDalbey%2C+K%3BJones%2C+M+D%3BPatra%2C+A+K%3BPieri%2C+D+C%3BPitman%2C+E+B%3BSheridan%2C+M+F&rft.aulast=Stefanescu&rft.aufirst=E&rft.date=2012-06-08&rft.volume=468&rft.issue=2142&rft.spage=1543&rft.isbn=&rft.btitle=&rft.title=Proceedings+-+Royal+Society.+Mathematical%2C+Physical+and+Engineering+Sciences&rft.issn=13645021&rft_id=info:doi/10.1098%2Frspa.2011.0711 L2 - http://rspa.royalsocietypublishing.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Royal Society, London, United Kingdom N1 - Date revised - 2012-01-01 N1 - Number of references - 53 N1 - Document feature - illus. N1 - Last updated - 2012-10-18 N1 - CODEN - PRLAAZ N1 - SubjectsTermNotLitGenreText - Andes; California; case studies; Colombia; debris flows; digital simulation; digital terrain models; Galeras; geologic hazards; Mammoth Mountain; mass movements; natural hazards; numerical models; pyroclastic flows; risk assessment; South America; TITAN2D model; uncertainty; United States; volcanic risk; volcanoes DO - http://dx.doi.org/10.1098/rspa.2011.0711 ER - TY - JOUR T1 - Use of radium isotopes to evaluate naturally-occurring uranium and radium sources and behavior in New Mexico groundwaters; examples from three sites AN - 1356357889; 2013-042285 AB - Elevated Ra activities and U concentrations occur in some New Mexico groundwaters, and represent health hazards as Ra can be a significant contributor to the total radioactivity, and U is a nephrotoxin. Data are presented here from three contrasting sites in bedrock aquifers: (1) Wells sampled in Permian sandstones near Glorieta have elevated U (8.5 to 24.2 mu g/L) and in one case, elevated Ra (up to >14 pCi/L); (2) a deep well near the Zuni Mountains has highly elevated Ra (>20 pCi/L) and low U; and (3) wells sampled near Laguna Pueblo, in the Jackpile and Brushy Basin Members of the Morrison Formation (units hosting roll-front U deposits nearby), are reducing and have low U and Ra. Trends in Ra isotope ratios ( (super 224) Ra/ (super 228) Ra and (super 228) Ra/ (super 226) Ra) provide insights into the sources and mobility of U and Ra in these wells, and can influence decisions about water treatment vs. obtaining alternative water sources to meet drinking water standards. The Glorieta waters are oxic, with variable (super 228) Ra/ (super 226) Ra values, indicating a variable degree of U enrichment in the aquifer sandstones, while (super 224) Ra/ (super 228) Ra ratios close to one suggest that Ra is labile, sorbing and desorbing rapidly relative to the half-life of (super 224) Ra (3.6 days). In reducing groundwaters near the Zuni Mountains, U concentrations are low. Ra is low in one well but highly elevated in a nearby well, and (super 228) Ra/ (super 226) Ra values are very low (<0.25), implying enrichment of U in the aquifer sediments. Although U concentrations were low in reducing groundwaters from the Laguna area, low (super 228) Ra/ (super 226) Ra values (<0.4) suggest enrichment of U relative to Th in the clastic sedimentary aquifer units. (super 224) Ra/ (super 228) Ra values are variable but overall close to 1. This study used an innovative low-cost method for (super 226) Ra analyses. Radium was concentrated onto Mn oxide coated fibers and counted via decay products after a 20 day incubation period using an inexpensive radon-in-air detector. This technique could be used for low-cost long-term monitoring of water sources or pilot tests for radium treatment. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - Abstracts with Programs - Geological Society of America AU - Bryan, Charles R AU - Siegel, Malcolm AU - Vinson, David S AU - Raanan-Kiperwas, Hadas AU - Vengosh, Avner AU - Dwyer, Gary AU - Anonymous Y1 - 2012/05// PY - 2012 DA - May 2012 SP - 77 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - water quality KW - isotopes KW - radioactivity KW - sandstone KW - New Mexico KW - Ra-228/Ra-226 KW - ground water KW - sedimentary rocks KW - radioactive isotopes KW - Morrison Formation KW - bedrock KW - concentration KW - alkaline earth metals KW - monitoring KW - Upper Jurassic KW - radium KW - Jurassic KW - Paleozoic KW - isotope ratios KW - Permian KW - Mesozoic KW - Zuni Mountains KW - metals KW - uranium KW - water resources KW - clastic rocks KW - actinides KW - 21:Hydrogeology KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1356357889?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Use+of+radium+isotopes+to+evaluate+naturally-occurring+uranium+and+radium+sources+and+behavior+in+New+Mexico+groundwaters%3B+examples+from+three+sites&rft.au=Bryan%2C+Charles+R%3BSiegel%2C+Malcolm%3BVinson%2C+David+S%3BRaanan-Kiperwas%2C+Hadas%3BVengosh%2C+Avner%3BDwyer%2C+Gary%3BAnonymous&rft.aulast=Bryan&rft.aufirst=Charles&rft.date=2012-05-01&rft.volume=44&rft.issue=6&rft.spage=77&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Rocky Mountain Section, 64th annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-05-30 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - actinides; alkaline earth metals; bedrock; clastic rocks; concentration; ground water; isotope ratios; isotopes; Jurassic; Mesozoic; metals; monitoring; Morrison Formation; New Mexico; Paleozoic; Permian; Ra-228/Ra-226; radioactive isotopes; radioactivity; radium; sandstone; sedimentary rocks; United States; Upper Jurassic; uranium; water quality; water resources; Zuni Mountains ER - TY - JOUR T1 - CHALLENGES IN DETERMINING THE ISOTOPIC MIXTURE FOR THE FUKUSHIMA DAIICHI NUCLEAR POWER PLANT ACCIDENT AN - 1017963956; 16644556 AB - This paper discusses the challenges and lessons learned associated with the analysis of field collected samples and gamma spectra in an attempt to determine the isotopic mixture present on the ground around the Fukushima Daiichi Nuclear Power Plant There were several interesting and surprising lessons to be learned from the sample analysis portion of the response. The paper discusses several elements of the response that were unique to the event occurring in Japan, as well as several elements that would have occurred even in a U.S. nuclear reactor event. In addition, there are specific sections discussing details of the specific analytical challenges faced during the efforts to analyze samples and try to understand the overall release source term. JF - Health Physics AU - Shanks, A AU - Fournier, S AU - Shanks, S AD - Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185, USA, ashank@sandia.gov Y1 - 2012/05// PY - 2012 DA - May 2012 SP - 527 EP - 534 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 102 IS - 5 SN - 0017-9078, 0017-9078 KW - Risk Abstracts KW - Nuclear power plants KW - USA KW - Accidents KW - Nuclear reactors KW - R2 23020:Technological risks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1017963956?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Health+Physics&rft.atitle=CHALLENGES+IN+DETERMINING+THE+ISOTOPIC+MIXTURE+FOR+THE+FUKUSHIMA+DAIICHI+NUCLEAR+POWER+PLANT+ACCIDENT&rft.au=Shanks%2C+A%3BFournier%2C+S%3BShanks%2C+S&rft.aulast=Shanks&rft.aufirst=A&rft.date=2012-05-01&rft.volume=102&rft.issue=5&rft.spage=527&rft.isbn=&rft.btitle=&rft.title=Health+Physics&rft.issn=00179078&rft_id=info:doi/10.1097%2FHP.0b013e31824cc01a LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-05-01 N1 - Last updated - 2013-08-12 N1 - SubjectsTermNotLitGenreText - Nuclear power plants; Accidents; Nuclear reactors; USA DO - http://dx.doi.org/10.1097/HP.0b013e31824cc01a ER - TY - JOUR T1 - False event screening using data mining in historical archives AN - 959101686; 2012-034042 JF - Seismological Research Letters AU - Draelos, Timothy J AU - Procopio, Michael J AU - Lewis, Jennifer E AU - Young, Christopher J Y1 - 2012/04// PY - 2012 DA - April 2012 SP - 267 EP - 274 PB - Seismological Society of America, El Cerrito, CA VL - 83 IS - 2 SN - 0895-0695, 0895-0695 KW - history KW - technology KW - monitoring KW - seismicity KW - explosions KW - classification KW - nuclear explosions KW - information management KW - data management KW - Comprehensive Test Ban Treaty KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/959101686?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=False+event+screening+using+data+mining+in+historical+archives&rft.au=Draelos%2C+Timothy+J%3BProcopio%2C+Michael+J%3BLewis%2C+Jennifer+E%3BYoung%2C+Christopher+J&rft.aulast=Draelos&rft.aufirst=Timothy&rft.date=2012-04-01&rft.volume=83&rft.issue=2&rft.spage=267&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/10.1785%2Fgssrl.83.2.267 L2 - http://srl.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Seismological Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2012-01-01 N1 - Number of references - 11 N1 - PubXState - CA N1 - Document feature - illus. incl. 2 tables, sketch map N1 - Last updated - 2016-10-25 N1 - CODEN - EAQNAT N1 - SubjectsTermNotLitGenreText - classification; Comprehensive Test Ban Treaty; data management; explosions; history; information management; monitoring; nuclear explosions; seismicity; technology DO - http://dx.doi.org/10.1785/gssrl.83.2.267 ER - TY - JOUR T1 - Defying Borders In Future Conflict In East Asia: Chinese Capabilities In The Realm Of Information Warfare And Cyber Space AN - 1126525469; 201228937 AB - Information Warfare (IW) especially in the digital ether of cyberspace has become a realm that defies borders, challenges state boundaries, and most significantly, provides the military of a nation to realize certain political goals, allowing for a more precise form of propaganda, With the world heavily slipping into, and relying upon, the age of information, a future conflict within Asia, more specifically East Asia, could witness tactics of cyber war becoming a key component and feature. Potential future conflicts of the 21st century will not simply be restricted to the traditional military sphere, and growing reliance on cyberspace has made issues pertaining to national security even more susceptible. The tactics of cyber war are relatively low-cost and readily available, thus making it all the more attractive for states as well as non-state actors to exploit the skills of hackers or so-called 'patriotic cyber-warriors', The increasing use of asymmetric techniques which will define future conflict, exhibits the use of cyber warfare as the foremost tool, The central premise in current Chinese military thinking tends to revolve around the scenario that if Beijing needed to win future wars, it would have to prepare for conducting warfare "beyond all boundaries and limitations." Perhaps the most crucial among the 'beyond rules' criteria is manifested in the form of "asymmetric warfare," for instance, guerrilla war (mostly urban), terrorist activities and cyber attacks directed against data networks. China in all probability is likely to develop greater depth and sophistication in its understanding and handling of information warfare techniques and information operations. Given that China views the Middle Kingdom as the center of the world, it would attempt to dominate the information space, and gain an 'information advantage.'. Adapted from the source document. JF - The Journal of East Asian Affairs AU - Chansoria, Monika AD - Cooperative Monitoring Center (CMC), Sandia National Laboratories, Albuquerque, United States of America Y1 - 2012/04// PY - 2012 DA - April 2012 SP - 105 EP - 127 PB - Research Institute for International Affairs, Seoul Korea VL - 26 IS - 1 SN - 1010-1608, 1010-1608 KW - Information Warfare, Cyber Attacks, China's Campaign of "Informationization", Information Dominance (zhixinxiquan), Cyber Cops, Global Digital Warfare KW - Borders KW - Peoples Republic of China KW - East Asia KW - War KW - Boundaries KW - Asia KW - National Security KW - Armed Forces KW - Conflict KW - article KW - 9063: international relations; international relations UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1126525469?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awpsa&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+Journal+of+East+Asian+Affairs&rft.atitle=Defying+Borders+In+Future+Conflict+In+East+Asia%3A+Chinese+Capabilities+In+The+Realm+Of+Information+Warfare+And+Cyber+Space&rft.au=Chansoria%2C+Monika&rft.aulast=Chansoria&rft.aufirst=Monika&rft.date=2012-04-01&rft.volume=26&rft.issue=1&rft.spage=105&rft.isbn=&rft.btitle=&rft.title=The+Journal+of+East+Asian+Affairs&rft.issn=10101608&rft_id=info:doi/ LA - English DB - Worldwide Political Science Abstracts N1 - Date revised - 2013-02-01 N1 - Last updated - 2016-09-28 N1 - SubjectsTermNotLitGenreText - War; Peoples Republic of China; Conflict; Armed Forces; Boundaries; Borders; East Asia; National Security; Asia ER - TY - JOUR T1 - Predicting the acidity constant of a goethite hydroxyl group from first principles. AN - 927691777; 22395040 AB - Accurate predictions of the acid-base behavior of hydroxyl groups at mineral surfaces are critical for understanding the trapping of toxic and radioactive ions in soil samples. In this work, we apply ab initio molecular dynamics (AIMD) simulations and potential-of-mean-force techniques to calculate the pK(a) of a doubly protonated oxygen atom bonded to a single Fe atom (Fe(I)OH(2)) on the goethite (101) surface. Using formic acid as a reference system, pK(a) = 7.0 is predicted, suggesting that isolated, positively charged groups of this type are marginally stable at neutral pH. Similarities and differences between AIMD and the more empirical multi-site complexation methodology are highlighted, particularly with respect to the treatment of hydrogen bonding with water and proton sharing among surface hydroxyl groups. We also highlight the importance of an electronic structure method that can accurately predict transition metal ion properties for goethite pK(a) calculations. JF - Journal of physics. Condensed matter : an Institute of Physics journal AU - Leung, Kevin AU - Criscenti, Louise J AD - Sandia National Laboratories, MS 1415 and 0754, Albuquerque, NM 87185, USA. kleung@sandia.gov Y1 - 2012/03/28/ PY - 2012 DA - 2012 Mar 28 SP - 124105 VL - 24 IS - 12 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/927691777?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+physics.+Condensed+matter+%3A+an+Institute+of+Physics+journal&rft.atitle=Predicting+the+acidity+constant+of+a+goethite+hydroxyl+group+from+first+principles.&rft.au=Leung%2C+Kevin%3BCriscenti%2C+Louise+J&rft.aulast=Leung&rft.aufirst=Kevin&rft.date=2012-03-28&rft.volume=24&rft.issue=12&rft.spage=124105&rft.isbn=&rft.btitle=&rft.title=Journal+of+physics.+Condensed+matter+%3A+an+Institute+of+Physics+journal&rft.issn=1361-648X&rft_id=info:doi/10.1088%2F0953-8984%2F24%2F12%2F124105 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2012-09-19 N1 - Date created - 2012-03-08 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1088/0953-8984/24/12/124105 ER - TY - JOUR T1 - Modeling subsurface water resource systems involving heterogeneous porous media using the variational multiscale formulation AN - 1026860567; 2012-067164 AB - This work compares two popular mixed finite element formulations used to model subsurface flow and transport in heterogeneous porous media, namely, the lowest order Raviart-Thomas and the variational multiscale stabilized formulations. Comparison is made based on performance for several problems of engineering relevance that involve highly heterogeneous material properties (permeability ratios of up to 1X10 (super 5) ), open flow boundary conditions (pressure driven flows), and large scale domains in two dimensions. Numerical experiments are performed to show the degree to which mass conservation is violated when a flow field computed using either element is used as the advection velocity in a transport model. The results reveal that the equal-order interpolation under the variational multiscale formulation shows considerable mass production or loss for problems that involve flow tangential to layers of differing permeability. But the violation of local mass balance is marginal for problems in which flow is orthogonal to the layers of differing permeability. For problems involving pressure dependent viscosity, we show that models with a high degree of pressure dependence exhibit improved performance for the variational multiscale method. The results are useful in establishing rudimentary estimates of the error produced by using the variational multiscale formulation for several different types of problems related to subsurface water resource systems. JF - Journal of Hydrology AU - Turner, D Z AU - Nakshatrala, K B AU - Martinez, M J AU - Notz, P K Y1 - 2012/03/27/ PY - 2012 DA - 2012 Mar 27 SP - 1 EP - 14 PB - Elsevier, Amsterdam VL - 428-429 SN - 0022-1694, 0022-1694 KW - experimental studies KW - pressure KW - numerical analysis KW - injection KW - porous materials KW - mathematical models KW - properties KW - advection KW - boundary conditions KW - reservoir rocks KW - ground water KW - aquifers KW - models KW - finite element analysis KW - heterogeneous materials KW - viscosity KW - transport KW - mass balance KW - mathematical methods KW - velocity KW - water resources KW - accuracy KW - permeability KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1026860567?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology&rft.atitle=Modeling+subsurface+water+resource+systems+involving+heterogeneous+porous+media+using+the+variational+multiscale+formulation&rft.au=Turner%2C+D+Z%3BNakshatrala%2C+K+B%3BMartinez%2C+M+J%3BNotz%2C+P+K&rft.aulast=Turner&rft.aufirst=D&rft.date=2012-03-27&rft.volume=428-429&rft.issue=&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2011.12.024 L2 - http://www.sciencedirect.com/science/journal/00221694 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 37 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2012-07-19 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - accuracy; advection; aquifers; boundary conditions; experimental studies; finite element analysis; ground water; heterogeneous materials; injection; mass balance; mathematical methods; mathematical models; models; numerical analysis; permeability; porous materials; pressure; properties; reservoir rocks; transport; velocity; viscosity; water resources DO - http://dx.doi.org/10.1016/j.jhydrol.2011.12.024 ER - TY - JOUR T1 - Lithiation Induced Stress and Failure of Anode Materials in Lithium Ion Batteries AN - 1372609725; 18028855 AB - Lithiation induced stress and failure in anode materials were observed by in-situ electron microscopy. The stress and failure were strongly materials, size, and orientation dependent. Upon charging of SnO2 nanowires, we observed high density of dislocations in the reaction front, while in charging of ZnO nanowires, we observed discrete cracks in the reaction front. In charging Si nanowires, we found the volume expansion was highly anisotropic, resulting in a dumbbell-shaped cross-section and cracking, eventually splitting the single nanowire into sub-wires. Carbon coating not only increases rate performance but also alters the lithiation-induced strain of SnO2 nanowires. The radial expansion of the coated nanowires was completely suppressed. The lithiation process of individual Si nanoparticles was strongly size-dependent, i.e., there exists a critical particle size with a diameter of ~150 nm, below which the particles neither cracked nor fractured upon lithiation, above which the particles first formed cracks and then fractured. JF - AIP Conference Proceedings AU - Huang, Jianyu AD - Sandia National Laboratories Y1 - 2012/03/15/ PY - 2012 DA - 2012 Mar 15 PB - American Institute of Physics, Ste. 1NO1 Melville NY 11747-4502 United States SN - 0094-243X, 0094-243X KW - Environment Abstracts KW - Particle size KW - Conferences KW - Batteries KW - Microscopy KW - Zinc KW - Stress KW - Particulates KW - Lithium KW - Coatings KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1372609725?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=AIP+Conference+Proceedings&rft.atitle=Lithiation+Induced+Stress+and+Failure+of+Anode+Materials+in+Lithium+Ion+Batteries&rft.au=Huang%2C+Jianyu&rft.aulast=Huang&rft.aufirst=Jianyu&rft.date=2012-03-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=AIP+Conference+Proceedings&rft.issn=0094243X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Particle size; Batteries; Conferences; Zinc; Microscopy; Stress; Particulates; Lithium; Coatings ER - TY - JOUR T1 - In-Situ Ion Irradiation TEM and Nanoindentation Studies of 316L and HT9 AN - 1372609651; 18028429 AB - To validate new cladding materials or predict the properties of existing reactors under extended life conditions, techniques are needed that permit insight into the microstructural and mechanical property evolution that occurs under these extreme environments. This presentation will highlight the recent improvements made to the in-situ ion irradiation TEM at Sandia and the resulting additional capabilities. To highlight these capabilities, in-situ ion irradiation of both 316L and HT9 samples prepared by FIB lift-out will be presented. In addition, the nanoindentation results from 316L stainless steel and HT9 irradiated under various conditions, as well as diffusion coupled with various refractory metals, will be presented. To relate the microstructural evolution to the nanoindentation results, a FEM incorporating a SRIM-based vacancy distribution profile will be provided. The combination of in-situ ion irradiation TEM and small scale mechanical property testing of ion irradiated materials provides a rapid method for characterizing microstructural evolution. JF - AIP Conference Proceedings AU - Hattar, Khalid AU - Mcginnis, Alexander AU - Buchheit, Thomas AD - Sandia National Laboratories Y1 - 2012/03/15/ PY - 2012 DA - 2012 Mar 15 PB - American Institute of Physics, Ste. 1NO1 Melville NY 11747-4502 United States SN - 0094-243X, 0094-243X KW - Environment Abstracts KW - Austenitic stainless steels KW - Heat resistant steels KW - Duplex stainless steels KW - Ferritic stainless steels KW - Martensitic stainless steels KW - 316L KW - HT9 KW - Metals KW - Conferences KW - Irradiation KW - Diffusion KW - Steel KW - Technology KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1372609651?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=AIP+Conference+Proceedings&rft.atitle=In-Situ+Ion+Irradiation+TEM+and+Nanoindentation+Studies+of+316L+and+HT9&rft.au=Hattar%2C+Khalid%3BMcginnis%2C+Alexander%3BBuchheit%2C+Thomas&rft.aulast=Hattar&rft.aufirst=Khalid&rft.date=2012-03-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=AIP+Conference+Proceedings&rft.issn=0094243X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Metals; Conferences; Irradiation; Diffusion; Steel; Technology ER - TY - JOUR T1 - Investigating the Role of Grain Boundaries during the Plastic Deformation of Bicrystalline Nanowires Using Molecular Dynamics AN - 1372609133; 18028861 AB - The competition between free surfaces and grain boundaries to act as preferred sites for dislocation nucleation in aluminum nanowires is investigated using molecular dynamics simulations at room temperature. A number of bicrystalline nanowires containing various minimum energy boundaries are studied under uniaxial compression, providing a broad, inclusive look on the competition between the two types of sources. The simulation results provide insight into recent micro-compression experiments on bicrystals, suggesting the role of the vertical grain boundaries as sinks rather than sources for dislocations. Furthermore, this work compares the behavior of nanowires containing both low and highangle symmetric tilt boundaries with those containing random high-angle boundaries. JF - AIP Conference Proceedings AU - Tucker, Garritt AU - Aitken, Zachary AU - Greer, Julia AU - Weinberger, Christopher AD - Sandia National Laboratories Y1 - 2012/03/15/ PY - 2012 DA - 2012 Mar 15 PB - American Institute of Physics, Ste. 1NO1 Melville NY 11747-4502 United States SN - 0094-243X, 0094-243X KW - Environment Abstracts KW - Conferences KW - Aluminum KW - Temperature KW - Simulation KW - Grains KW - Competition KW - Technology KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1372609133?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=AIP+Conference+Proceedings&rft.atitle=Investigating+the+Role+of+Grain+Boundaries+during+the+Plastic+Deformation+of+Bicrystalline+Nanowires+Using+Molecular+Dynamics&rft.au=Tucker%2C+Garritt%3BAitken%2C+Zachary%3BGreer%2C+Julia%3BWeinberger%2C+Christopher&rft.aulast=Tucker&rft.aufirst=Garritt&rft.date=2012-03-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=AIP+Conference+Proceedings&rft.issn=0094243X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Conferences; Aluminum; Temperature; Simulation; Grains; Competition; Technology ER - TY - JOUR T1 - The Impact of Sidewall Roughness on the Macroscopic Tensile Strength of Polycrystalline Silicon AN - 1372606927; 18027879 AB - In order to design efficient, reliable microelectromechanical systems (MEMS), one must understand the statistics of failure. For brittle systems, we can better understand strength distributions through flaw distributions. Specifically, we seek to investigate the role of sidewall flaw depth and curvature on the macroscopic tensile strength of polycrystalline silicon through targeted atomic force microscopy (AFM) and finite element (FE) simulations. The coupled AFM/FE approach hinges on accurate surface representations and predictive analysis methods. Crack initiation and propagation are modeled through a cohesive zone approach and the predicted strengths are parameterized to determine that grain boundary grooves, both deep and sharp, are the dominant sidewall defects.Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - AIP Conference Proceedings AU - Foulk, James AU - Boyce, Brad AU - Reedy, Earl AU - Ohlhausen, James AD - Sandia National Laboratories Y1 - 2012/03/15/ PY - 2012 DA - 2012 Mar 15 PB - American Institute of Physics, Ste. 1NO1 Melville NY 11747-4502 United States SN - 0094-243X, 0094-243X KW - Environment Abstracts KW - Security KW - USA KW - Silicon KW - Conferences KW - Contracts KW - Microscopy KW - Simulation KW - Nuclear energy KW - Grains KW - Technology KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1372606927?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=AIP+Conference+Proceedings&rft.atitle=The+Impact+of+Sidewall+Roughness+on+the+Macroscopic+Tensile+Strength+of+Polycrystalline+Silicon&rft.au=Foulk%2C+James%3BBoyce%2C+Brad%3BReedy%2C+Earl%3BOhlhausen%2C+James&rft.aulast=Foulk&rft.aufirst=James&rft.date=2012-03-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=AIP+Conference+Proceedings&rft.issn=0094243X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Security; Silicon; Contracts; Conferences; Microscopy; Simulation; Nuclear energy; Grains; Technology; USA ER - TY - JOUR T1 - The Effect of Microstructure on Strain Field Inhomogeneities in Fatigue Crack Growth AN - 1372601798; 18026931 AB - Variability in fatigue lifetimes can largely be attributed to microstructure, but at this time, most microstructural effects are known only in a qualitative sense. A better quantitative understanding of the relationship between microstructure and inhomogeneous deformation behavior in fatigue could provide more accurate predictions of variability in fatigue crack growth rates and fatigue lifetimes. In this work, multiscale strain measurements from a high-resolution digital image correlation technique were used to study fatigue crack growth in a nickel based superalloy, Hastelloy X. Both sub-grain-level and macroscale strain fields were captured at intervals of fatigue crack growth. Lobes of elevated strain emanating asymmetrically from the crack were observed. The relationship between these inhomogeneities and microstructure was examined by comparing strain fields to full-field microstructural measurements obtained through electron backscatter diffraction. Additionally, the relationship between these strain fields and mode mixity was considered. This work was inspired by Robert Ritchie's compelling multiscale research on fatigue cracks. JF - AIP Conference Proceedings AU - Carroll, Jay AU - Abuzaid, Wael AU - Casperson, Mallory AU - Lambros, John AU - Sehitoglu, Huseyin AU - Chona, Ravinder AU - Boyce, Brad AD - Sandia National Laboratories Y1 - 2012/03/15/ PY - 2012 DA - 2012 Mar 15 PB - American Institute of Physics, Ste. 1NO1 Melville NY 11747-4502 United States SN - 0094-243X, 0094-243X KW - Environment Abstracts KW - Nickel base alloys KW - Superalloys KW - Hastelloy KW - Hastelloy X KW - Prediction KW - Fatigue KW - Conferences KW - Nickel KW - Deformation KW - Technology KW - ENA 06:Food & Drugs UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1372601798?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=AIP+Conference+Proceedings&rft.atitle=The+Effect+of+Microstructure+on+Strain+Field+Inhomogeneities+in+Fatigue+Crack+Growth&rft.au=Carroll%2C+Jay%3BAbuzaid%2C+Wael%3BCasperson%2C+Mallory%3BLambros%2C+John%3BSehitoglu%2C+Huseyin%3BChona%2C+Ravinder%3BBoyce%2C+Brad&rft.aulast=Carroll&rft.aufirst=Jay&rft.date=2012-03-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=AIP+Conference+Proceedings&rft.issn=0094243X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Prediction; Fatigue; Conferences; Nickel; Technology; Deformation ER - TY - JOUR T1 - Laser diagnostics of soot precursors in a heavy-duty diesel engine at low-temperature combustion conditions AN - 1010902508; 16188595 AB - To better understand in-cylinder soot formation processes for modern, low-emissions, low-temperature combustion (LTC) operating conditions in diesel engines, soot and its precursors are imaged by laser diagnostics in a heavy duty optical engine. Virtually simultaneous images of planar laser-induced incandescence of soot (soot-PLII) using 1064 nm excitation and combined soot-PLII and planar laser-induced fluorescence of poly-cyclic aromatic hydrocarbons (PAH-PLIF) using 532 nm excitation reveal the temporal and spatial evolution of soot and its precursors during combustion. With increasing dilution of the intake air stream by various levels of nitrogen to simulate the use of exhaust-gas recirculation (EGR) to achieve LTC, the residence time of PAH increases as soot formation is delayed. At zero dilution (21% intake oxygen), soot appears nearly simultaneously with PAH, while at higher dilution (12.7% or 9.5% intake oxygen), soot formation is delayed by hundreds of microseconds to a millisecond or more. At all dilution levels, at its onset, PAH rapidly fills most of the downstream cross-section of the jet, with a relatively uniform fluorescence intensity distribution. The spatial evolution of soot, however, shifts from a relatively rapid filling of the downstream head of the jet at low dilution, to inception at the midstream periphery of the jet followed by a gradual progression downstream at high dilution. Effects of fuel-bound aromatics are also explored by comparing soot and PAH formation for a representative diesel fuel containing 27% aromatics by weight to that for neat n-heptane. The residence time of PAH before the onset of soot is slightly longer with the non-aromatic fuel, but otherwise the spatial and temporal evolution of PAH-PLIF and soot-PLII are indistinguishable from that of the diesel fuel at LTC conditions. Spectral analysis shows a characteristic soot emission spectra from 1064 nm excitation, while 532 nm excitation yields significant short-wavelength emission that cannot be attributed solely to soot incandescence, and is likely due to fluorescence of large PAH soot precursors. No narrow spectral features, such as from C2 or C3 emission, are apparent in the spectra, even at high laser fluence. JF - Combustion and Flame AU - Bobba, Mohan Krishna AU - Musculus, Mark Paul Blobaum AD - Sandia National Laboratories, Engine Combustion Div., Combustion Research Facility, 7011 East Avenue, Livermore, CA 94550, United States Y1 - 2012/02// PY - 2012 DA - Feb 2012 SP - 832 EP - 843 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 159 IS - 2 SN - 0010-2180, 0010-2180 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Aerospace & High Technology Database (AH) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1010902508?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Combustion+and+Flame&rft.atitle=Laser+diagnostics+of+soot+precursors+in+a+heavy-duty+diesel+engine+at+low-temperature+combustion+conditions&rft.au=Bobba%2C+Mohan+Krishna%3BMusculus%2C+Mark+Paul+Blobaum&rft.aulast=Bobba&rft.aufirst=Mohan&rft.date=2012-02-01&rft.volume=159&rft.issue=2&rft.spage=832&rft.isbn=&rft.btitle=&rft.title=Combustion+and+Flame&rft.issn=00102180&rft_id=info:doi/10.1016%2Fj.combustflame.2011.07.017 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-05-01 N1 - Last updated - 2012-05-04 DO - http://dx.doi.org/10.1016/j.combustflame.2011.07.017 ER - TY - JOUR T1 - Membrane treatment of side-stream cooling tower water for reduction of water usage AN - 920791417; 16166092 AB - A pilot study was conducted to determine whether membrane treatment on a side stream of recirculating cooling-tower water could reduce overall water usage and discharge. The treated permeate was returned to the cooling tower while the concentrate was discharged to the sanitary sewer. Flow rates, pressures and water chemistry were monitored. The pilot demonstrated potential substantial water savings. Maximum make-up water and discharge reduction were 16% and 49%, respectively. As high as possible permeate recovery is needed to maximize water conservation. Silica scaling on the membranes limited water savings in this pilot. Development of membranes with a solute-rejection capacity less than the 92% average of the membranes used in the pilot would assist in optimizing water savings. Decreased water outlays compensated for the additional energy used by membrane treatment. Scaling control is critical for economic operation. JF - Desalination AU - Altman, Susan J AU - Jensen, Richard P AU - Cappelle, Malynda A AU - Sanchez, Andres L AU - Everett, Randy L AU - Anderson, Howard L AU - McGrath, Lucas K AD - Geochemistry Department, Sandia National Laboratories, P.O. Box 5800, MS-0754, Albuquerque, NM 87185-0754, USA, sjaltma@sandia.gov Y1 - 2012/01/31/ PY - 2012 DA - 2012 Jan 31 SP - 177 EP - 183 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 285 SN - 0011-9164, 0011-9164 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts; Aqualine Abstracts; Water Resources Abstracts KW - Water conservation KW - Desalination KW - Streams KW - Flow rates KW - Sanitation KW - Flow Rates KW - silica KW - Water Chemistry KW - Economics KW - Cooling systems KW - water use KW - Towers KW - Membranes KW - River discharge KW - Water Conservation KW - scaling KW - Silica KW - Stream KW - Capacity KW - Scaling KW - Water chemistry KW - Cooling Towers KW - AQ 00001:Water Resources and Supplies KW - ENA 03:Energy KW - SW 1010:Saline water conversion KW - Q2 09182:Methods and instruments KW - M2 551.5:General (551.5) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/920791417?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Desalination&rft.atitle=Membrane+treatment+of+side-stream+cooling+tower+water+for+reduction+of+water+usage&rft.au=Altman%2C+Susan+J%3BJensen%2C+Richard+P%3BCappelle%2C+Malynda+A%3BSanchez%2C+Andres+L%3BEverett%2C+Randy+L%3BAnderson%2C+Howard+L%3BMcGrath%2C+Lucas+K&rft.aulast=Altman&rft.aufirst=Susan&rft.date=2012-01-31&rft.volume=285&rft.issue=&rft.spage=177&rft.isbn=&rft.btitle=&rft.title=Desalination&rft.issn=00119164&rft_id=info:doi/10.1016%2Fj.desal.2011.09.052 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-02-01 N1 - Number of references - 5 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Towers; Water Chemistry; Stream; Water conservation; River discharge; Water chemistry; water use; Sanitation; Membranes; silica; Economics; Cooling systems; Flow rates; scaling; Silica; Flow Rates; Desalination; Capacity; Water Conservation; Streams; Scaling; Cooling Towers DO - http://dx.doi.org/10.1016/j.desal.2011.09.052 ER - TY - CPAPER T1 - Radial Bulk-Mode Vibrations in a Gate-All-around Silicon Nanowire Transistor T2 - 25th International Conference on Micro Electro Mechanical Systems (IEEE MEMS 2012) AN - 1313103270; 6148682 JF - 25th International Conference on Micro Electro Mechanical Systems (IEEE MEMS 2012) AU - Ziaei-Moayyed, M AU - Resnick, P AU - Draper, B AU - Okandan, M Y1 - 2012/01/29/ PY - 2012 DA - 2012 Jan 29 KW - Vibration KW - Silicon KW - nanotechnology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313103270?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=25th+International+Conference+on+Micro+Electro+Mechanical+Systems+%28IEEE+MEMS+2012%29&rft.atitle=Radial+Bulk-Mode+Vibrations+in+a+Gate-All-around+Silicon+Nanowire+Transistor&rft.au=Ziaei-Moayyed%2C+M%3BResnick%2C+P%3BDraper%2C+B%3BOkandan%2C+M&rft.aulast=Ziaei-Moayyed&rft.aufirst=M&rft.date=2012-01-29&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=25th+International+Conference+on+Micro+Electro+Mechanical+Systems+%28IEEE+MEMS+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://www.mems2012.org/program/MEMS2012_TechnicalProgram.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Thermal Conductivity Manipulation in Single Crystal Silicon via Lithographycally Defined Phononic Crystals T2 - 25th International Conference on Micro Electro Mechanical Systems (IEEE MEMS 2012) AN - 1313102223; 6148389 JF - 25th International Conference on Micro Electro Mechanical Systems (IEEE MEMS 2012) AU - Kim, B AU - Nguyen, J AU - Clews, P AU - Reinke, C AU - Goettler, D AU - Leseman, Z AU - El-Kady, I AU - Olsson III, R. Y1 - 2012/01/29/ PY - 2012 DA - 2012 Jan 29 KW - Silicon KW - Thermal conductivity KW - Crystals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313102223?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=25th+International+Conference+on+Micro+Electro+Mechanical+Systems+%28IEEE+MEMS+2012%29&rft.atitle=Thermal+Conductivity+Manipulation+in+Single+Crystal+Silicon+via+Lithographycally+Defined+Phononic+Crystals&rft.au=Kim%2C+B%3BNguyen%2C+J%3BClews%2C+P%3BReinke%2C+C%3BGoettler%2C+D%3BLeseman%2C+Z%3BEl-Kady%2C+I%3BOlsson+III%2C+R.&rft.aulast=Kim&rft.aufirst=B&rft.date=2012-01-29&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=25th+International+Conference+on+Micro+Electro+Mechanical+Systems+%28IEEE+MEMS+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://www.mems2012.org/program/MEMS2012_TechnicalProgram.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Diffusional exchange of isotopes in a metal hydride sphere AN - 1671453194; 16070519 AB - A model is developed that simulates exchange of one hydrogen isotope with another hydrogen isotope in a spherical metal hydride particle. This is one of the fundamental physical processes operative during isotope exchange in a bed of spherical metal particles and is thus one of the key components in any comprehensive physics-based model of exchange. A critical aspect that must be considered is that the diffusion of one isotope depends not only on its own concentration gradient, but also on the concentration gradient of the other isotope. This coupling arises because the chemical potential of each isotope depends on the concentrations of all isotopes as well as the presence of vacancies within the metal hydride. This thermodynamic coupling is derived from the Gibbs free energy of mixing and the excess chemical potential due to elastic and electronic interactions. Unknown diffusion coefficients appearing in this formulation of isotope transport are determined by fitting to available experimental data. Example calculations illustrate times required for isotope exchange and the asymmetries observed between forward and reverse exchanges due to differences in isotope stoichiometry and diffusivity. JF - Chemical Engineering Science AU - James, Scott C AU - Hamilton, John AU - Wolfer, Wilhelm G AD - Sandia National Laboratories, Thermal/Fluids Science and Engineering Department, P.O. Box 969, Livermore, CA 94551-0969, United States scjames@sandia.gov Y1 - 2012/01/22/ PY - 2012 DA - 2012 Jan 22 SP - 250 EP - 257 PB - Elsevier B.V., P.O. Box 800 Kidlington Oxford OX5 1DX United Kingdom VL - 68 IS - 1 SN - 0009-2509, 0009-2509 KW - Solid State and Superconductivity Abstracts (SO); Environmental Engineering Abstracts (EN); ANTE: Abstracts in New Technologies and Engineering (AN) KW - Metal hydride KW - Hydrogen isotope exchange KW - Hydrogen diffusion in metals KW - Exchange kinetics KW - Hydrogen interdiffusion on a metal lattice KW - Hydrogen chemical potentials KW - Isotopes KW - Mathematical models KW - Concentration gradient KW - Diffusion KW - Electronics KW - Metal hydrides KW - Hydrogen isotopes KW - Chemical potential KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671453194?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Engineering+Science&rft.atitle=Diffusional+exchange+of+isotopes+in+a+metal+hydride+sphere&rft.au=James%2C+Scott+C%3BHamilton%2C+John%3BWolfer%2C+Wilhelm+G&rft.aulast=James&rft.aufirst=Scott&rft.date=2012-01-22&rft.volume=68&rft.issue=1&rft.spage=250&rft.isbn=&rft.btitle=&rft.title=Chemical+Engineering+Science&rft.issn=00092509&rft_id=info:doi/10.1016%2Fj.ces.2011.09.038 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-04-01 N1 - Last updated - 2016-05-18 DO - http://dx.doi.org/10.1016/j.ces.2011.09.038 ER - TY - JOUR T1 - Automatic transport model data assimilation in Laplace space AN - 920792971; 16222808 AB - Emerging in situ sensors and distributed network technologies have the potential to monitor dynamic hydrological and environmental processes more effectively than traditional monitoring and data acquisition techniques by sampling at greater spatial and temporal resolutions. Since sensor networks supply data with little or no delay, applications exist where automatic or real-time assimilation of this data would be useful, for example, during smart remediation procedures where tracking of the plume response will reinforce real-time decisions. As a foray into this new data context, we consider the estimation of hydraulic conductivity when incorporating subsurface plume concentration data. Current practice optimizes the model in the time domain, which is often slow and very nonlinear. Instead, we perform model inversion in Laplace space and are able to do so because data gathered using new technologies can be sampled densely in time. An intermediate-scale synthetic aquifer is used to illustrate the developed technique. JF - Water Resources Research AU - Barnhart, K S AU - Illangasekare, TH AD - Sandia National Laboratories, Carlsbad, New Mexico, USA Y1 - 2012/01/13/ PY - 2012 DA - 2012 Jan 13 PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 48 IS - 01 SN - 0043-1397, 0043-1397 KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - 1832 Hydrology: Groundwater transport KW - 1846 Hydrology: Model calibration KW - 1848 Hydrology: Monitoring networks KW - Laplace transform KW - model inversion KW - parameter estimation KW - wireless sensor networks KW - Aquifers KW - Hydraulic conductivity KW - Hydraulics KW - Aquifer KW - Groundwater hydrology KW - Bioremediation KW - Sensors KW - Ecological distribution KW - Automation KW - Water resources KW - Data assimilation KW - Hydrologic Models KW - Networks KW - Sampling KW - Plumes KW - Data acquisition KW - Data collection KW - Hydrologic analysis KW - Tracking KW - Inversions KW - Inversion KW - Remediation KW - Groundwater pollution KW - Groundwater KW - Monitoring KW - Water resources research KW - Technology KW - AQ 00001:Water Resources and Supplies KW - Q2 09123:Conservation KW - P 2000:FRESHWATER POLLUTION KW - M2 556.18:Water Management (556.18) KW - SW 6010:Structures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/920792971?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Automatic+transport+model+data+assimilation+in+Laplace+space&rft.au=Barnhart%2C+K+S%3BIllangasekare%2C+TH&rft.aulast=Barnhart&rft.aufirst=K&rft.date=2012-01-13&rft.volume=48&rft.issue=01&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2011WR010955 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-02-01 N1 - Number of references - 33 N1 - Last updated - 2014-11-12 N1 - SubjectsTermNotLitGenreText - Aquifer; Sensors; Ecological distribution; Remediation; Water resources; Data acquisition; Inversions; Tracking; Hydraulic conductivity; Aquifers; Groundwater hydrology; Hydrologic analysis; Groundwater pollution; Water resources research; Data assimilation; Hydraulics; Data collection; Bioremediation; Inversion; Plumes; Technology; Hydrologic Models; Networks; Automation; Sampling; Monitoring; Groundwater DO - http://dx.doi.org/10.1029/2011WR010955 ER - TY - JOUR T1 - Quantifying DNS namespace influence AN - 964168606; 201203884 AB - Name resolution using the Domain Name System (DNS) is integral to today's Internet. The resolution of a domain name is often dependent on namespace outside the control of the domain's owner. In this article we review the DNS protocol and several DNS server implementations. Based on our examination, we propose a formal model for analyzing the name dependencies inherent in DNS. Using our name dependency model we derive metrics to quantify the extent to which domain names affect other domain names. It is found that under certain conditions, more than half of the queries for a domain name are influenced by namespaces not expressly configured by administrators. This result serves to quantify the degree of vulnerability of DNS due to dependencies that administrators are unaware of. When we apply metrics from our model to production DNS data, we show that the set of domains whose resolution affects a given domain name is much smaller than previously thought. However, behaviors such as using cached addresses for querying authoritative servers and chaining domain name aliases increase the number and diversity of influential domains, thereby making the DNS infrastructure more vulnerable. Adapted from the source document. JF - Computer Networks AU - Deccio, Casey AU - Sedayao, Jeff AU - Kant, Krishna AU - Mohapatra, Prasant AD - Sandia National Laboratories, P.O. Box 969, Livermore, CA, United States Y1 - 2012///0, PY - 2012 DA - 0, 2012 SP - 780 EP - 794 PB - Elsevier B.V., Amsterdam, The Netherlands VL - 56 IS - 2 SN - 1389-1286, 1389-1286 KW - DNS KW - Networks KW - Dependencies KW - Graphs KW - Internet KW - Models KW - Domain names KW - article KW - 14.11: COMMUNICATIONS AND INFORMATION TECHNOLOGY - NETWORKS UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/964168606?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Alisa&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computer+Networks&rft.atitle=Quantifying+DNS+namespace+influence&rft.au=Deccio%2C+Casey%3BSedayao%2C+Jeff%3BKant%2C+Krishna%3BMohapatra%2C+Prasant&rft.aulast=Deccio&rft.aufirst=Casey&rft.date=2012-01-01&rft.volume=56&rft.issue=2&rft.spage=780&rft.isbn=&rft.btitle=&rft.title=Computer+Networks&rft.issn=13891286&rft_id=info:doi/10.1016%2Fj.comnet.2011.11.005 LA - English DB - Library & Information Science Abstracts (LISA) N1 - Date revised - 2012-04-01 N1 - Last updated - 2016-09-27 N1 - CODEN - CNETDP N1 - SubjectsTermNotLitGenreText - Domain names; Models; Internet DO - http://dx.doi.org/10.1016/j.comnet.2011.11.005 ER - TY - JOUR T1 - Mechanisms of trace metal sorption in Pseudomonas putida-birnessite assemblages AN - 1832587105; 650184-3 JF - Geophysical Research Abstracts AU - Pena, J AU - Kwon, K D AU - Bargar, J R AU - Sposito, G AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - Abstract EGU2012 EP - 9149-2 PB - Copernicus GmbH on behalf of the European Geosciences Union (EGU), Katlenburg-Lindau VL - 14 SN - 1029-7006, 1029-7006 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832587105?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Abstracts&rft.atitle=Mechanisms+of+trace+metal+sorption+in+Pseudomonas+putida-birnessite+assemblages&rft.au=Pena%2C+J%3BKwon%2C+K+D%3BBargar%2C+J+R%3BSposito%2C+G%3BAnonymous&rft.aulast=Pena&rft.aufirst=J&rft.date=2012-01-01&rft.volume=14&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Abstracts&rft.issn=10297006&rft_id=info:doi/ L2 - http://meetingorganizer.copernicus.org/EGU2012/EGU2012-9149-2.pdf http://www.copernicus.org/EGU/gra/gra.html LA - English DB - GeoRef N1 - Conference title - European Geosciences Union general assembly 2012 N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - A seismic event detection and signal association algorithm AN - 1793206430; 2016-047901 JF - Geophysical Research Abstracts AU - Draelos, T J AU - Ballard, S AU - Young, C J AU - Gonzales, M AU - Brogan, R AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - Abstract EGU2012 EP - 6831 PB - Copernicus GmbH on behalf of the European Geosciences Union (EGU), Katlenburg-Lindau VL - 14 SN - 1029-7006, 1029-7006 KW - P-waves KW - body waves KW - numerical models KW - three-dimensional models KW - global KW - statistical analysis KW - elastic waves KW - seismicity KW - SALSA3D KW - probability KW - seismic waves KW - algorithms KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206430?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Abstracts&rft.atitle=A+seismic+event+detection+and+signal+association+algorithm&rft.au=Draelos%2C+T+J%3BBallard%2C+S%3BYoung%2C+C+J%3BGonzales%2C+M%3BBrogan%2C+R%3BAnonymous&rft.aulast=Draelos&rft.aufirst=T&rft.date=2012-01-01&rft.volume=14&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Abstracts&rft.issn=10297006&rft_id=info:doi/ L2 - http://meetingorganizer.copernicus.org/EGU2012/EGU2012-6831.pdf http://www.copernicus.org/EGU/gra/gra.html LA - English DB - GeoRef N1 - Conference title - European Geosciences Union general assembly 2012 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - SuppNotes - Accessed on March 15, 2016 N1 - Last updated - 2016-06-02 N1 - SubjectsTermNotLitGenreText - algorithms; body waves; elastic waves; global; numerical models; P-waves; probability; SALSA3D; seismic waves; seismicity; statistical analysis; three-dimensional models ER - TY - JOUR T1 - Improving event locations using a global 3D P-velocity model of the Earth's crust and mantle AN - 1793206336; 2016-047890 JF - Geophysical Research Abstracts AU - Ballard, S AU - Begnaud, M L AU - Young, C J AU - Hipp, J R AU - Encarnacao, A V AU - Chael, E P AU - Phillips, W S AU - Steck, L K AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - Abstract EGU2012 EP - 6817 PB - Copernicus GmbH on behalf of the European Geosciences Union (EGU), Katlenburg-Lindau VL - 14 SN - 1029-7006, 1029-7006 KW - P-waves KW - body waves KW - three-dimensional models KW - statistical analysis KW - mantle KW - elastic waves KW - seismicity KW - traveltime KW - SALSA3D KW - seismic waves KW - earthquakes KW - uncertainty KW - crust KW - covariance analysis KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1793206336?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Abstracts&rft.atitle=Improving+event+locations+using+a+global+3D+P-velocity+model+of+the+Earth%27s+crust+and+mantle&rft.au=Ballard%2C+S%3BBegnaud%2C+M+L%3BYoung%2C+C+J%3BHipp%2C+J+R%3BEncarnacao%2C+A+V%3BChael%2C+E+P%3BPhillips%2C+W+S%3BSteck%2C+L+K%3BAnonymous&rft.aulast=Ballard&rft.aufirst=S&rft.date=2012-01-01&rft.volume=14&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Abstracts&rft.issn=10297006&rft_id=info:doi/ L2 - http://meetingorganizer.copernicus.org/EGU2012/EGU2012-6817.pdf http://www.copernicus.org/EGU/gra/gra.html LA - English DB - GeoRef N1 - Conference title - European Geosciences Union general assembly 2012 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - SuppNotes - Accessed on March 14, 2016 N1 - Last updated - 2016-06-02 N1 - SubjectsTermNotLitGenreText - body waves; covariance analysis; crust; earthquakes; elastic waves; mantle; P-waves; SALSA3D; seismic waves; seismicity; statistical analysis; three-dimensional models; traveltime; uncertainty ER - TY - JOUR T1 - A the end of the line; diffuse groundwater discharge and palaeohydrology at the terminus of the Great Artesian Basin AN - 1542644655; 2014-048112 JF - Proceedings - International Association of Hydrogeologists Congress AU - Harrington, Glenn A AU - Smerdon, Brian D AU - Gardner, W Payton AU - Hendry, M Jim AU - Holysh, Steve AU - Howard, Ken Y1 - 2012 PY - 2012 DA - 2012 SP - 172 PB - [publisher varies], [location varies] VL - 39 KW - isotopes KW - halogens KW - preferential flow KW - He-4 KW - Great Artesian Basin KW - stable isotopes KW - ground water KW - chloride ion KW - noble gases KW - tracers KW - helium KW - Australia KW - deuterium KW - discharge KW - diffusivity KW - chlorine KW - concentration KW - Australasia KW - paleohydrology KW - aquitards KW - aquifers KW - recharge KW - hydrogen KW - pore water KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542644655?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+-+International+Association+of+Hydrogeologists+Congress&rft.atitle=A+the+end+of+the+line%3B+diffuse+groundwater+discharge+and+palaeohydrology+at+the+terminus+of+the+Great+Artesian+Basin&rft.au=Harrington%2C+Glenn+A%3BSmerdon%2C+Brian+D%3BGardner%2C+W+Payton%3BHendry%2C+M+Jim%3BHolysh%2C+Steve%3BHoward%2C+Ken&rft.aulast=Harrington&rft.aufirst=Glenn&rft.date=2012-01-01&rft.volume=39&rft.issue=&rft.spage=172&rft.isbn=&rft.btitle=&rft.title=Proceedings+-+International+Association+of+Hydrogeologists+Congress&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 39th International Association of Hydrogeologists congress N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-07-04 N1 - CODEN - #06122 N1 - SubjectsTermNotLitGenreText - aquifers; aquitards; Australasia; Australia; chloride ion; chlorine; concentration; deuterium; diffusivity; discharge; Great Artesian Basin; ground water; halogens; He-4; helium; hydrogen; isotopes; noble gases; paleohydrology; pore water; preferential flow; recharge; stable isotopes; tracers ER - TY - JOUR T1 - Iodide and iodate interactions with clay minerals AN - 1520103493; 2014-027824 AB - Clay minerals are likely candidates to aid in waste isolation due to their low permeability, favorable swelling properties, and high cation sorption capacities. Iodine-129 is often the major driver of exposure risk from nuclear waste repositories at timescales >10,000 years. Therefore, understanding the geochemical cycling of iodine in clays is critical in developing defensible quantitative descriptions of nuclear waste disposal. Anions are not typically considered to interact with most clays as it is assumed that the fixed negative charge of clays actively repels the dissolved anion. This is corroborated by many batch studies, but diffusion experiments in compacted clays have shown iodide retardation relative to chloride. The reasons for this are unknown; however, several possible hypotheses include: redox transformation controls on sorption behavior, complex surface charge environments due to overlapping charge domains, and sorption to ancillary minerals or weathering products. A series of clay minerals have been examined using several techniques to characterize the surface charge environment of the clays, as well as to discern the potential for redox transformation and variable sorption behavior of different iodine oxidation states. Surface charge environments were examined through surface titrations and cation exchange capacity determination with methylene blue. Batch sorption experiments were completed with illite and palygorskite samples with both iodide and iodate. The batch experiments were completed at a range of pH values from 4-10, and at a constant ionic strength of 0.1M NaCl. Sorption experiments were performed at 20g/L solid:solution ratios to exacerbate sorption properties. The results show a range of sorption behaviors based on the clay mineral involved, as well as chemical conditions such as pH. Palygorskite has a higher sorption affinity for iodide compared to illite. There is evidence for some anion exchange capacity on palygorskite; iodide sorption led to fluoride release. While not typically considered as a disposal medium, this result points to the use of alternative clay minerals to further isolate anionic components in nuclear waste. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's Nation Nuclear Security Administration under contract DE-AC04-94AL85000. JF - Mineralogical Magazine AU - Miller, Andrew AU - Kruichak, Jessica AU - Tellez, Hernesto AU - Wang, Yifeng AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 2109 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - silicates KW - halides KW - isotopes KW - iodides KW - halogens KW - iodates KW - clay minerals KW - waste management KW - iodine KW - radioactive isotopes KW - I-129 KW - chemical reactions KW - sheet silicates KW - waste disposal KW - chemical composition KW - geochemistry KW - 06A:Sedimentary petrology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520103493?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Iodide+and+iodate+interactions+with+clay+minerals&rft.au=Miller%2C+Andrew%3BKruichak%2C+Jessica%3BTellez%2C+Hernesto%3BWang%2C+Yifeng%3BAnonymous&rft.aulast=Miller&rft.aufirst=Andrew&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=2109&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://minmag.geoscienceworld.org/content/76/6/2045.full.pdf+html http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-05-01 N1 - CODEN - MNLMBB N1 - SubjectsTermNotLitGenreText - chemical composition; chemical reactions; clay minerals; geochemistry; halides; halogens; I-129; iodates; iodides; iodine; isotopes; radioactive isotopes; sheet silicates; silicates; waste disposal; waste management ER - TY - JOUR T1 - Alkali and alkaline earth metal adsorption to goethite AN - 1507177132; 2014-017508 AB - The adsorption of metals to Fe-hydroxides such as goethite influences contaminant migration in the subsurface environment. Many surface complexes have been proposed for cation adsorption to goethite. In this study, we use classical molecular dynamics (MD) simulations to investigate the specific location of surface species with respect to both the mineral surface and to the structured water at the interface. Simulations are conducted for a range of NaCl, MgCl (sub 2) and BaCl (sub 2) concentrations to evaluate the impact of ion adsorption on the interfacial water structure, and to evaluate how surface speciation might change with increased surface loading. Comparisons will be made between the adsorption of Na (super +) , Mg2+, Ba2+ from NaCl, MgCl (sub 2) and BaCl (sub 2) solutions of different concentrations. Atomic density profiles, partition coefficients, statistics on the types of species formed on the surfaces (i.e., inner- vs. outer-sphere, ion-pairs), and water dipole orientation data will be presented. Differences in the electric double layer formed at the (100) and (101) surfaces will be discussed. This research is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration contract DE-AC04-94AL85000. JF - Mineralogical Magazine AU - Criscenti, Louise J AU - Hart, David AU - Kwon, Kideok AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 1606 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - soils KW - goethite KW - pollutants KW - pollution KW - adsorption KW - iron hydroxides KW - ground water KW - alkalic composition KW - hydroxides KW - oxides KW - cations KW - alkalinity KW - chemical composition KW - geochemistry KW - 02C:Geochemistry of rocks, soils, and sediments KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1507177132?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Alkali+and+alkaline+earth+metal+adsorption+to+goethite&rft.au=Criscenti%2C+Louise+J%3BHart%2C+David%3BKwon%2C+Kideok%3BAnonymous&rft.aulast=Criscenti&rft.aufirst=Louise&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=1606&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://minmag.geoscienceworld.org/content/76/6/1534.full.pdf+html http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-03-14 N1 - CODEN - MNLMBB N1 - SubjectsTermNotLitGenreText - adsorption; alkalic composition; alkalinity; cations; chemical composition; geochemistry; goethite; ground water; hydroxides; iron hydroxides; oxides; pollutants; pollution; soils ER - TY - JOUR T1 - Geologic disposal options for high-level radioactive waste and the potential impacts of reprocessing spent nuclear fuel AN - 1371765515; 2013-051499 AB - Arguments have been made that various strategies for treating high-level radioactive wastes, including the reprocessing of spent nuclear fuel, can provide significant benefits for the long-term performance of geologic disposal systems. Published results of detailed safety assessments for deep geologic disposal concepts in multiple countries, including the United States, Sweden, and France, provide insight into those aspects of the waste form that are most important to the long-term performance of the repository system. Review of those insights leads to inferences about the extent to which hypothetical modifications to the wastes, including processing to remove and reuse fissile material, possible separation and transmutation of other transuranic elements, and the creation of durable waste forms, could impact long-term disposal system performance. Metrics of interest include waste volume, thermal loading, radionuclide inventory, waste-form lifetime, and estimates of long-term radionuclide releases from the disposal system. Available information supports a conclusion that multiple geologic disposal options can provide robust and safe isolation for a broad range of waste forms, including spent nuclear fuel, without the need for further processing. Sandia National Laboratories is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - International Geological Congress, Abstracts = Congres Geologique International, Resumes AU - Swift, Peter N AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 2630 PB - [International Geological Congress], [location varies] VL - 34 KW - high-level waste KW - underground storage KW - underground installations KW - waste disposal KW - reprocessing KW - environmental effects KW - radioactive waste KW - 30:Engineering geology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1371765515?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Geological+Congress%2C+Abstracts+%3D+Congres+Geologique+International%2C+Resumes&rft.atitle=Geologic+disposal+options+for+high-level+radioactive+waste+and+the+potential+impacts+of+reprocessing+spent+nuclear+fuel&rft.au=Swift%2C+Peter+N%3BAnonymous&rft.aulast=Swift&rft.aufirst=Peter&rft.date=2012-01-01&rft.volume=34&rft.issue=&rft.spage=2630&rft.isbn=&rft.btitle=&rft.title=International+Geological+Congress%2C+Abstracts+%3D+Congres+Geologique+International%2C+Resumes&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 34th international geological congress N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by International Geological Congress Organizational Committee N1 - Date revised - 2013-01-01 N1 - Last updated - 2013-06-27 N1 - CODEN - IGABBY N1 - SubjectsTermNotLitGenreText - environmental effects; high-level waste; radioactive waste; reprocessing; underground installations; underground storage; waste disposal ER - TY - JOUR T1 - Reference design and operations for deep borehole disposal of high-level radioactive waste AN - 1371764597; 2013-051500 AB - The deep borehole disposal concept consists of drilling a 5-km borehole into continental crystalline basement rocks, emplacement of waste canisters containing used nuclear fuel or high-level radioactive waste in the lower 2 km, and sealing of the upper 3 km of the borehole. Low permeability, high salinity, and geochemically reducing conditions at depth in many locations indicate low mobility of radionucides and negligible interaction of deep groundwater with the near-surface environment. Thermal-hydrologic modeling shows limited groundwater circulation from waste heat. A reference design and operations for a deep borehole disposal system were developed based on current drilling methods and engineering technology. Waste canisters are designed to withstand hydrostatic pressures and heat output from waste during the operational phase. Borehole seals consist of compacted bentonite, cement plugs, and backfill. The total cost of drilling, borehole construction, waste canister loading, emplacement, and borehole sealing is estimated to be $40 million per borehole. Assuming fuel assemblies are dismantled and consolidated, each borehole would have a capacity for the disposal of about 240 metric tons of uranium in used nuclear fuel. An estimated 585 boreholes would be required for disposal of the existing and projected waste from the current commercial reactor fleet in the U.S. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under Contract DE-AC04-94AL85000. JF - International Geological Congress, Abstracts = Congres Geologique International, Resumes AU - Arnold, Bill AU - Brady, Pat AU - Vaughn, Palmer AU - Orrell, S Andrew AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 2631 PB - [International Geological Congress], [location varies] VL - 34 KW - United States KW - high-level waste KW - basement KW - techniques KW - salinity KW - deep borehole method KW - radioactive waste KW - ground water KW - boreholes KW - metals KW - heat flow KW - movement KW - crystalline rocks KW - uranium KW - waste disposal KW - actinides KW - permeability KW - Eh KW - design KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1371764597?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Geological+Congress%2C+Abstracts+%3D+Congres+Geologique+International%2C+Resumes&rft.atitle=Reference+design+and+operations+for+deep+borehole+disposal+of+high-level+radioactive+waste&rft.au=Arnold%2C+Bill%3BBrady%2C+Pat%3BVaughn%2C+Palmer%3BOrrell%2C+S+Andrew%3BAnonymous&rft.aulast=Arnold&rft.aufirst=Bill&rft.date=2012-01-01&rft.volume=34&rft.issue=&rft.spage=2631&rft.isbn=&rft.btitle=&rft.title=International+Geological+Congress%2C+Abstracts+%3D+Congres+Geologique+International%2C+Resumes&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 34th international geological congress N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by International Geological Congress Organizational Committee N1 - Date revised - 2013-01-01 N1 - Last updated - 2013-06-27 N1 - CODEN - IGABBY N1 - SubjectsTermNotLitGenreText - actinides; basement; boreholes; crystalline rocks; deep borehole method; design; Eh; ground water; heat flow; high-level waste; metals; movement; permeability; radioactive waste; salinity; techniques; United States; uranium; waste disposal ER - TY - JOUR T1 - Geological disposal options and site selection in the USA AN - 1371763884; 2013-051496 AB - The United States contain many geologic formations likely to be technically suitable for deep geologic disposal of nuclear waste. Potential repository environments were evaluated with respect to first-order attributes that relate to repository development and performance. Given appropriate repository designs, there is substantial confidence that compliance with regulatory standards for waste isolation can be demonstrated for several geologic settings, disposal concepts, and rock types. Discriminating characteristics of each geologic setting (depth, unit thickness, structure, seismicity, plastic deformation, etc.) and associated variations in disposal methodology were evaluated, noting that technical site screening and suitability evaluations depend on the disposal concept. Based on international programs and decades of experience in repository development, it is highly likely that a suitable, compliant repository can be developed within many geologic surroundings. Given suitable geologic settings, other considerations such as waste locations, existence of transportation and other infrastructure, stakeholder acceptance, data density, etc. are combined to identify potentially preferable domains for subsequent repository development. This review of national scale considerations in site selection is relevant to others that are embarking on repository development programs, whether for nuclear waste or other disposal challenges such as carbon sequestration. JF - International Geological Congress, Abstracts = Congres Geologique International, Resumes AU - Hansen, Francis D AU - Hardin, Ernest AU - Orrell, Andrew AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 2627 PB - [International Geological Congress], [location varies] VL - 34 KW - United States KW - technology KW - carbon sequestration KW - site exploration KW - waste disposal sites KW - waste disposal KW - design KW - storage KW - radioactive waste KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1371763884?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Geological+Congress%2C+Abstracts+%3D+Congres+Geologique+International%2C+Resumes&rft.atitle=Geological+disposal+options+and+site+selection+in+the+USA&rft.au=Hansen%2C+Francis+D%3BHardin%2C+Ernest%3BOrrell%2C+Andrew%3BAnonymous&rft.aulast=Hansen&rft.aufirst=Francis&rft.date=2012-01-01&rft.volume=34&rft.issue=&rft.spage=2627&rft.isbn=&rft.btitle=&rft.title=International+Geological+Congress%2C+Abstracts+%3D+Congres+Geologique+International%2C+Resumes&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 34th international geological congress N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by International Geological Congress Organizational Committee N1 - Date revised - 2013-01-01 N1 - Last updated - 2013-06-27 N1 - CODEN - IGABBY N1 - SubjectsTermNotLitGenreText - carbon sequestration; design; radioactive waste; site exploration; storage; technology; United States; waste disposal; waste disposal sites ER - TY - JOUR T1 - Arguments and evidence against a Younger Dryas impact event AN - 1328506187; 2013-033751 JF - Geophysical Monograph AU - Boslough, M AU - Nicoll, Kathleen AU - Holliday, V AU - Daulton, T L AU - Meltzer, D AU - Pinter, N AU - Scott, A C AU - Surovell, T AU - Claeys, P AU - Gill, J AU - Paquay, F AU - Marlon, J AU - Bartlein, P AU - Whitlock, C AU - Grayson, D AU - Tull, A J T Y1 - 2012 PY - 2012 DA - 2012 SP - 13 EP - 26 PB - American Geophysical Union, Washington, DC VL - 198 SN - 0065-8448, 0065-8448 KW - archaeology KW - Quaternary KW - impacts KW - paleoclimatology KW - climate change KW - paleoecology KW - upper Pleistocene KW - Cenozoic KW - upper Weichselian KW - Weichselian KW - Clovis KW - Pleistocene KW - mass extinctions KW - Younger Dryas KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1328506187?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Monograph&rft.atitle=Arguments+and+evidence+against+a+Younger+Dryas+impact+event&rft.au=Boslough%2C+M%3BNicoll%2C+Kathleen%3BHolliday%2C+V%3BDaulton%2C+T+L%3BMeltzer%2C+D%3BPinter%2C+N%3BScott%2C+A+C%3BSurovell%2C+T%3BClaeys%2C+P%3BGill%2C+J%3BPaquay%2C+F%3BMarlon%2C+J%3BBartlein%2C+P%3BWhitlock%2C+C%3BGrayson%2C+D%3BTull%2C+A+J+T&rft.aulast=Boslough&rft.aufirst=M&rft.date=2012-01-01&rft.volume=198&rft.issue=&rft.spage=13&rft.isbn=9781118704325&rft.btitle=&rft.title=Geophysical+Monograph&rft.issn=00658448&rft_id=info:doi/10.1029%2F2012GM001209 LA - English DB - GeoRef N1 - Conference title - AGU Chapman conference on Climates, past landscapes, and civilizations N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 100 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-03-14 N1 - CODEN - GPMGAD N1 - SubjectsTermNotLitGenreText - archaeology; Cenozoic; climate change; Clovis; impacts; mass extinctions; paleoclimatology; paleoecology; Pleistocene; Quaternary; upper Pleistocene; upper Weichselian; Weichselian; Younger Dryas DO - http://dx.doi.org/10.1029/2012GM001209 ER - TY - JOUR T1 - Inverse modeling of experiments to support more realistic simulations of sorbing radionuclide transport AN - 1328505428; 2013-033347 AB - A series of adsorption, desorption, and column transport experiments were conducted to evaluate the transport of uranium (U) and neptunium (Np) through saturated volcanic tuffs. For potential high-level radioactive waste sites, these experiments demonstrate that slow radionuclide desorption processes, which are typically not accounted for in transport models implementing simple partition coefficients (Kd values), may dominate field-scale transport. A complimentary interpretive numerical model couples a simplified geochemical description of the system with transport calculations where heterogeneities are represented as an ensemble of sorption sites with characteristic adsorption and desorption rate constants that have widely varying values. Adsorption and desorption rate constants were estimated through inverse modeling such that reliable upscaled predictions of reactive transport in field settings could be simulated. The inverse modeling software, PEST, was also used to perform advanced uncer tainty quantification. The multicomponent model/parameters matching the combined data sets suggest that over much longer time and distance scales the transport of U and Np under the experimental conditions would result in very little transport over field scales because even a small number of strong sorption sites will have an exaggerated retarding influence on the transport of a radionuclide plume. Modeling of combined sorption/desorption experiments and column transport experiments that involve both the measurement of column effluent breakthrough curves and the distribution of radionuclides remaining in the column at the conclusion of the experiments holds significant promise for supporting an improved approach to properly account for mineralogical heterogeneity over long time and distance scales in reactive radionuclide transport models. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - International Geological Congress, Abstracts = Congres Geologique International, Resumes AU - James, Scott C AU - Reimus, Paul W AU - Arnold, Bill W AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 3618 PB - [International Geological Congress], [location varies] VL - 34 KW - sorption KW - desorption KW - neptunium KW - volcanic rocks KW - contaminant plumes KW - isotopes KW - igneous rocks KW - simulation KW - radioactive isotopes KW - transport KW - tuff KW - breakthrough curves KW - heterogeneity KW - high-level waste KW - experimental studies KW - numerical models KW - effluents KW - pollution KW - rates KW - adsorption KW - pyroclastics KW - metals KW - uranium KW - actinides KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1328505428?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Geological+Congress%2C+Abstracts+%3D+Congres+Geologique+International%2C+Resumes&rft.atitle=Inverse+modeling+of+experiments+to+support+more+realistic+simulations+of+sorbing+radionuclide+transport&rft.au=James%2C+Scott+C%3BReimus%2C+Paul+W%3BArnold%2C+Bill+W%3BAnonymous&rft.aulast=James&rft.aufirst=Scott&rft.date=2012-01-01&rft.volume=34&rft.issue=&rft.spage=3618&rft.isbn=&rft.btitle=&rft.title=International+Geological+Congress%2C+Abstracts+%3D+Congres+Geologique+International%2C+Resumes&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 34th international geological congress N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by International Geological Congress Organizational Committee N1 - Date revised - 2013-01-01 N1 - Last updated - 2013-04-19 N1 - CODEN - IGABBY N1 - SubjectsTermNotLitGenreText - actinides; adsorption; breakthrough curves; contaminant plumes; desorption; effluents; experimental studies; heterogeneity; high-level waste; igneous rocks; isotopes; metals; neptunium; numerical models; pollution; pyroclastics; radioactive isotopes; rates; simulation; sorption; transport; tuff; uranium; volcanic rocks ER - TY - JOUR T1 - Update on DOE's Safety and Regulatory Crosscut Work AN - 1268656043; 17431883 AB - The Department of Energy's (DOE) Fuel Cycle Technologies (FCT) program has a goal of conducting research with the objective of developing a sustainable nuclear fuel cycle. With this objective in mind, the FCT created the Safety and Regulatory Crosscut work package (WP) so that issues which cut across multiple WPs within the program can be addressed in a systematic manner. Sandia National Laboratories has been tasked with executing this WP. JF - Transactions of the American Nuclear Society AU - Middleton, Bobby D AU - Burns, Shawn P AD - Sandia National Laboratories, PO Box 5800 MS 1136, Albuquerque, NM 87123, bmiddle@sandia.gov Y1 - 2012 PY - 2012 DA - 2012 SP - 217 EP - 218 PB - American Nuclear Society, Inc. VL - 106 SN - 0003-018X, 0003-018X KW - Sustainability Science Abstracts; Health & Safety Science Abstracts KW - Fuels KW - Nuclear fuels KW - Sustainable development KW - Nuclear energy KW - Technology KW - H 8000:Radiation Safety/Electrical Safety KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1268656043?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Update+on+DOE%27s+Safety+and+Regulatory+Crosscut+Work&rft.au=Middleton%2C+Bobby+D%3BBurns%2C+Shawn+P&rft.aulast=Middleton&rft.aufirst=Bobby&rft.date=2012-01-01&rft.volume=106&rft.issue=&rft.spage=217&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-01-01 N1 - Number of references - 1 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Fuels; Nuclear fuels; Sustainable development; Nuclear energy; Technology ER - TY - JOUR T1 - Effect of asteroid decapitation on craters and basins AN - 1244699863; 2013-006747 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Schultz, P H AU - Stickle, A M AU - Crawford, D A AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 EP - Abstract 2428 PB - Lunar and Planetary Science Conference, Houston, TX VL - 43 KW - cratering KW - failures KW - experimental studies KW - numerical models KW - impact features KW - asteroids KW - Moon KW - trajectories KW - Mare Crisium KW - impacts KW - ring structures KW - laboratory studies KW - gravity anomalies KW - Mare Imbrium KW - oblique orientation KW - basins KW - impact craters KW - symmetry KW - Mare Moscoviense KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1244699863?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Effect+of+asteroid+decapitation+on+craters+and+basins&rft.au=Schultz%2C+P+H%3BStickle%2C+A+M%3BCrawford%2C+D+A%3BAnonymous&rft.aulast=Schultz&rft.aufirst=P&rft.date=2012-01-01&rft.volume=43&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2428.pdf LA - English DB - GeoRef N1 - Conference title - Forty-third lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 16 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Sept. 24, 2012 N1 - Last updated - 2012-12-27 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - asteroids; basins; cratering; experimental studies; failures; gravity anomalies; impact craters; impact features; impacts; laboratory studies; Mare Crisium; Mare Imbrium; Mare Moscoviense; Moon; numerical models; oblique orientation; ring structures; symmetry; trajectories ER - TY - JOUR T1 - Pore-scale simulation of mixing-induced calcium carbonate precipitation and dissolution in a microfluidic pore network AN - 1244675109; 2013-008093 AB - We develop a 2-D pore scale model of coupled fluid flow, reactive transport, and calcium carbonate (CaCO (sub 3) ) precipitation and dissolution. The model is used to simulate transient experimental results of CaCO (sub 3) precipitation and dissolution under supersaturated conditions in a microfluidic pore network (i.e., micromodel) in order to improve understanding of coupled reactive transport systems perturbed by geological CO (sub 2) injection. In the micromodel, precipitation is induced by transverse mixing along the centerline in pore bodies. The reactive transport model includes the impact of pH upon carbonate speciation and a CaCO (sub 3) reaction rate constant, the effect of changing reactive surface area upon the reaction, and the impact of pore blockage from CaCO (sub 3) precipitation on diffusion and flow. Overall, the pore scale model qualitatively captured the precipitate morphology, precipitation rate, and maximum precipitation area using parameter values from the literature. In particular, we found that proper estimation of the effective diffusion coefficient (D (sub eff) ) and the reactive surface area is necessary to adequately simulate precipitation and dissolution rates. In order to match the initial phase of fast precipitation, it was necessary to consider the top and bottom of the micromodel as additional reactive surfaces. In order to match a later phase when dissolution occurred, it was necessary to increase the dissolution rate compared to the precipitation rate, but the simulated precipitate area was still higher than the experimental results after approximately 30 min, highlighting the need for future study. The model presented here allows us to simulate and mechanistically evaluate precipitation and dissolution of CaCO (sub 3) observed in a micromodel pore network. This study leads to improved understanding of the fundamental physicochemical processes of CaCO (sub 3) precipitation and dissolution under far-from-equilibrium conditions. JF - Water Resources Research AU - Yoon, Hongkyu AU - Valocchi, Albert J AU - Werth, Charles J AU - Dewers, Thomas Y1 - 2012 PY - 2012 DA - 2012 EP - Citation W02524 PB - American Geophysical Union, Washington, DC VL - 48 IS - 2 SN - 0043-1397, 0043-1397 KW - diffusion KW - numerical models KW - data processing KW - preferential flow KW - solution KW - porosity KW - two-dimensional models KW - ground water KW - transient phenomena KW - transport KW - precipitation KW - digital simulation KW - reactive transport KW - calcium carbonate KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1244675109?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Pore-scale+simulation+of+mixing-induced+calcium+carbonate+precipitation+and+dissolution+in+a+microfluidic+pore+network&rft.au=Yoon%2C+Hongkyu%3BValocchi%2C+Albert+J%3BWerth%2C+Charles+J%3BDewers%2C+Thomas&rft.aulast=Yoon&rft.aufirst=Hongkyu&rft.date=2012-01-01&rft.volume=48&rft.issue=2&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2011WR011192 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 71 N1 - PubXState - DC N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2012-12-27 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - calcium carbonate; data processing; diffusion; digital simulation; ground water; numerical models; porosity; precipitation; preferential flow; reactive transport; solution; transient phenomena; transport; two-dimensional models DO - http://dx.doi.org/10.1029/2011WR011192 ER - TY - JOUR T1 - An implicit differential equation governing lumped capacitance, radiation dominated, unsteady, heat transfer AN - 1221886361; 17365644 AB - Purpose - Although most physical problems in fluid mechanics and heat transfer are governed by nonlinear differential equations, it is less common to be confronted with a "so - called" implicit differential equation, i.e. a differential equation where the highest order derivative cannot be isolated. The purpose of this paper is to derive and analyze an implicit differential equation that arises from a simple model for radiation dominated heat transfer based upon an unsteady lumped capacitance approach. Design/methodology/approach - Here we discuss an implicit differential equation that arises from a simple model for radiation dominated heat transfer based upon an unsteady lumped capacitance approach. Due to the implicit nature of this problem, standard integration schemes, e.g. Runge-Kutta, are not conveniently applied to this problem. Moreover, numerical solutions do not provide the insight afforded by an analytical solution. Findings - A predictor predictor-corrector scheme with secant iteration is presented which readily integrates differential equations where the derivative cannot be explicitly obtained. These solutions are compared to numerical integration of the equations and show good agreement. Originality/value - The paper emphasizes that although large-scale, multi-dimensional time-dependent heat transfer simulation tools are routinely available, there are instances where unsteady, engineering models such as the one discussed here are both adequate and appropriate. JF - International Journal of Numerical Methods for Heat & Fluid Flow AU - De Chant, Lawrence AD - Sandia National Laboratories, Albuquerque, New Mexico, USA, ljdecha@sandia.gov Y1 - 2012///0, PY - 2012 DA - 0, 2012 SP - 896 EP - 906 PB - Emerald Group Publishing Limited, 60-62 Toller Lane Bradford West Yorkshire BD8 9BY United Kingdom VL - 22 IS - 7 SN - 0961-5539, 0961-5539 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Differential equations KW - Radiation KW - Capacitance KW - Heat transfer KW - Radiation dominated KW - Lumped capacitance KW - Implicit differential equation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1221886361?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Numerical+Methods+for+Heat+%26+Fluid+Flow&rft.atitle=An+implicit+differential+equation+governing+lumped+capacitance%2C+radiation+dominated%2C+unsteady%2C+heat+transfer&rft.au=De+Chant%2C+Lawrence&rft.aulast=De+Chant&rft.aufirst=Lawrence&rft.date=2012-01-01&rft.volume=22&rft.issue=7&rft.spage=896&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Numerical+Methods+for+Heat+%26+Fluid+Flow&rft.issn=09615539&rft_id=info:doi/10.1108%2F09615531211255770 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-02-01 N1 - Number of references - 18 N1 - Last updated - 2016-02-18 DO - http://dx.doi.org/10.1108/09615531211255770 ER - TY - JOUR T1 - The value of utilising stochastic mapping of food distribution networks for understanding risks and tracing contaminant pathways AN - 1113219567; 17229588 AB - Difficulties in adequately characterising food supply chain topologies contribute major uncertainty to risk assessments of the food sector. The capability to trace contaminated foods forward (to consumers) and back (to providers) is needed for rapid recalls during food contamination events. The objective of this work is to develop an approach for risk mitigation that protects us from an attack on the food distribution system. This paper presents a general methodology for the stochastic mapping of fresh produce supply chains and an application to a single, relatively simple case - edible sprouts in one region. The case study demonstrates how mapping the network topology and modelling the potential relationships allows users to determine the likely contaminant pathways and sources of contamination. The stochastic network representation improves the ability to explicitly incorporate uncertainties and identify vulnerabilities. JF - International Journal of Critical Infrastructures AU - Conrad, Stephen H AU - Beyeler, Walter E AU - Brown, Theresa J AD - Sandia National Laboratories, Albuquerque, NM 87185, USA. Y1 - 2012 PY - 2012 DA - 2012 SP - 216 EP - 224 PB - Inderscience Publishers Ltd., PO Box 735 Olney Bucks MK46 5WB United Kingdom VL - 8 IS - 2-3 SN - 1475-3219, 1475-3219 KW - Health & Safety Science Abstracts; Risk Abstracts KW - SCIENCE, ENGINEERING AND TECHNOLOGY KW - ENERGY AND ENVIRONMENT KW - RISK, SAFETY AND EMERGENCY MANAGEMENT KW - Civil Engineering and Structures KW - Infrastructures KW - Risk, Reliability and Safety KW - Security and Emergency Management KW - Risk assessment KW - Infrastructure KW - Mitigation KW - Food supply KW - Case studies KW - Mapping KW - Vulnerability KW - Contaminants KW - Food contamination KW - R2 23060:Medical and environmental health KW - H 4000:Food and Drugs UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1113219567?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Critical+Infrastructures&rft.atitle=The+value+of+utilising+stochastic+mapping+of+food+distribution+networks+for+understanding+risks+and+tracing+contaminant+pathways&rft.au=Conrad%2C+Stephen+H%3BBeyeler%2C+Walter+E%3BBrown%2C+Theresa+J&rft.aulast=Conrad&rft.aufirst=Stephen&rft.date=2012-01-01&rft.volume=8&rft.issue=2-3&rft.spage=216&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Critical+Infrastructures&rft.issn=14753219&rft_id=info:doi/10.1504%2FIJCIS.2012.049041 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-10-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Infrastructure; Risk assessment; Mitigation; Case studies; Food supply; Vulnerability; Mapping; Food contamination; Contaminants DO - http://dx.doi.org/10.1504/IJCIS.2012.049041 ER - TY - JOUR T1 - Solar Selective Coatings for Concentrating Solar Power Central Receivers AN - 1010918500; 16310626 AB - Concentrating solar power (CSP) is a renewable energy technology that converts solar thermal energy to mechanical work via a heat engine, which is then converted to electricity through a generator. These systems are typically large-capable of generating tens to hundreds of megawatts of electricity. Nearly 500 MW of concentrating solar power are currently installed in the U.S. JF - Advanced Materials & Processes AU - Hall, A AU - Ambrosini, A AU - Ho, C AD - Sandia National Laboratories Albuquerque, N. Mex., USA, achall@sandia.gov Y1 - 2012/01// PY - 2012 DA - Jan 2012 SP - 28 EP - 29 PB - ASM International VL - 170 IS - 1 SN - 0882-7958, 0882-7958 KW - Sustainability Science Abstracts KW - USA KW - Renewable energy KW - Solar energy KW - Coatings KW - Technology KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1010918500?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advanced+Materials+%26+Processes&rft.atitle=Solar+Selective+Coatings+for+Concentrating+Solar+Power+Central+Receivers&rft.au=Hall%2C+A%3BAmbrosini%2C+A%3BHo%2C+C&rft.aulast=Hall&rft.aufirst=A&rft.date=2012-01-01&rft.volume=170&rft.issue=1&rft.spage=28&rft.isbn=&rft.btitle=&rft.title=Advanced+Materials+%26+Processes&rft.issn=08827958&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-05-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Renewable energy; Solar energy; Technology; Coatings; USA ER - TY - JOUR T1 - Releases from hydrogen fuel-cell vehicles in tunnels AN - 1010891510; 16184788 AB - An important issue concerning the safe use of hydrogen-powered fuel-cell vehicles is the possibility of accidents inside tunnels resulting in the release of hydrogen. To investigate the potential consequences, a combined experimental and modeling study has been performed to characterize releases from a hydrogen fuel-cell vehicle inside a tunnel. In the scenario studied, all three of the fuel-cell vehicle's onboard hydrogen tanks were simultaneously released through three thermal pressure relief devices (TPRDs) toward the road surface. Computation fluid dynamics (CFD) simulations were used to model the release of hydrogen from the fuel-cell vehicle and to study the behavior of the ignitable hydrogen cloud inside the tunnel. Deflagration overpressure simulations of the hydrogen cloud within the tunnel were also performed for different ignition delay times and ignition locations. To provide model validation data for these simulations, experiments were performed in a scaled tunnel test facility at the SRI Corral Hollow Experiment Site (CHES). The scaled tunnel tests were designed to resemble the full-scale tunnel simulations using Froude scaling. The scale factor, based on the square route of the ratio of the SRI tunnel area to the full-scale tunnel area was 1/2.53. The same computational models used in the full-scale tunnel simulations were applied to these scaled tunnel tests to validate the modeling approach. JF - International Journal of Hydrogen Energy AU - Houf, William G AU - Evans, Greg H AU - Merilo, Erik AU - Groethe, Mark AU - James, Scott C AD - Sandia National Laboratories, Livermore, CA 94551-0969, USA Y1 - 2012/01// PY - 2012 DA - Jan 2012 SP - 715 EP - 719 PB - Elsevier B.V. VL - 37 IS - 1 SN - 0360-3199, 0360-3199 KW - Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); Aerospace & High Technology Database (AH) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1010891510?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Hydrogen+Energy&rft.atitle=Releases+from+hydrogen+fuel-cell+vehicles+in+tunnels&rft.au=Houf%2C+William+G%3BEvans%2C+Greg+H%3BMerilo%2C+Erik%3BGroethe%2C+Mark%3BJames%2C+Scott+C&rft.aulast=Houf&rft.aufirst=William&rft.date=2012-01-01&rft.volume=37&rft.issue=1&rft.spage=715&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Hydrogen+Energy&rft.issn=03603199&rft_id=info:doi/10.1016%2Fj.ijhydene.2011.09.110 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-05-01 N1 - Last updated - 2012-05-04 DO - http://dx.doi.org/10.1016/j.ijhydene.2011.09.110 ER - TY - JOUR T1 - ENVIRONMENTAL REVIEWS & CASE STUDIES: Engaging the Public and Decision Makers in Cooperative Modeling for Regional Water Management AN - 1777118345; 14296828 AB - In cooperative modeling projects, a group of people work together to develop a model to better understand a complex system and explore consequences of various "what if" scenarios. This report describes a case study from New Mexico in which representatives from diverse organizations and institutions employed system dynamics-based cooperative modeling enhanced by computer-supported cooperative work (CSCW) to design a model that could be used as a tool in making water management decisions. In this case, CSCW was necessitated by the geographically dispersed nature of the participating stakeholders. The case study reflects that, although it is no panacea, cooperative modeling can be a successful way to create a sense of community, even among geographically dispersed citizens and decision makers, to understand contentious and complex water management issues. The purpose of this article is to highlight lessons learned for applying cooperative modeling with CSCW to assist other practitioners and broaden possibilities for improved water management decisions. Environmental Practice 12:316-327 (2010) JF - Environmental Practice AU - Cockerill, Kristan AU - Tidwell, Vincent AU - Daniel, Lacy AU - Sun, Amy AD - Earth Systems Department , Sandia National Laboratories , Albuquerque, New Mexico cockerillkm@appstate.edu Y1 - 2011/12/07/ PY - 2011 DA - 2011 Dec 07 SP - 316 EP - 327 PB - Cambridge University Press, The Edinburgh Building, Cambridge CB2 2RU UK VL - 12 IS - 4 SN - 1466-0466, 1466-0466 KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Decision making KW - Mathematical models KW - Cooperative work KW - Water management KW - Computer aided instruction KW - Complex systems KW - Dynamical systems KW - Dispersion UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777118345?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Practice&rft.atitle=ENVIRONMENTAL+REVIEWS+%26amp%3B+CASE+STUDIES%3A+Engaging+the+Public+and+Decision+Makers+in+Cooperative+Modeling+for+Regional+Water+Management&rft.au=Cockerill%2C+Kristan%3BTidwell%2C+Vincent%3BDaniel%2C+Lacy%3BSun%2C+Amy&rft.aulast=Cockerill&rft.aufirst=Kristan&rft.date=2011-12-07&rft.volume=12&rft.issue=4&rft.spage=316&rft.isbn=&rft.btitle=&rft.title=Environmental+Practice&rft.issn=14660466&rft_id=info:doi/10.1017%2FS1466046610000372 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-04-01 N1 - Number of references - 37 N1 - Last updated - 2016-10-04 DO - http://dx.doi.org/10.1017/S1466046610000372 ER - TY - JOUR T1 - Combined chemical and topographical guidance cues for directing cytoarchitectural polarization in primary neurons AN - 902370029; 15763836 AB - Chemical and topographical cues can be used to guide dissociated neurons into user-defined network geometries on artificial substrates, yet control of neuron polarity (differentiation into axons and dendrites) remains an elusive goal. We developed a dual guidance cue strategy for directing morphological maturity in neurons in vitro using combined chemical and topographical guidance cues on glass substrates. The surface chemistry provides chemical attraction and repulsion for controlling neuron placement and outgrowth, while the topography provides additional surface area for neuron attachment. Poly-l-lysine (PLL) was adsorbed into etched trenches in glass substrates, and an acetone liftoff process was used to produce bifunctional surfaces with a hydrophobic hexamethyldisilazane (HMDS) background and trench patterns of PLL. We examined the cytoarchitectural polarization of dissociated hippocampal pyramidal neurons on guidance cues designed to promote rapid outgrowth of neurites onto continuous line features and delayed neurite outgrowth onto interrupted line features. An optimum distance of approximately 5 mu m between the cell body attachment node and the first interrupted line guidance cue led to specific cytoarchitectural polarization of greater than or equal to 60% of neurons by 3 days of culture in vitro. JF - Biomaterials AU - Greene, Adrienne C AU - Washburn, Cody M AU - Bachand, George D AU - James, Conrad D Y1 - 2011/12// PY - 2011 DA - Dec 2011 SP - 8860 EP - 8869 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 32 IS - 34 SN - 0142-9612, 0142-9612 KW - CSA Neurosciences Abstracts; Biotechnology and Bioengineering Abstracts KW - Neural cell KW - Cell polarity KW - Micropatterning KW - Neural network KW - Hippocampus KW - Surface area KW - Axon guidance KW - Cell culture KW - Hydrophobicity KW - Dendrites KW - Polarization KW - Poly-L-lysine KW - Differentiation KW - Neurons KW - Cell body KW - Axonogenesis KW - Polarity KW - Maturity KW - Acetone KW - Nodes KW - Pyramidal cells KW - Topography KW - W 30920:Tissue Engineering KW - N3 11006:Neuroanatomy, histology & cytology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/902370029?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biomaterials&rft.atitle=Combined+chemical+and+topographical+guidance+cues+for+directing+cytoarchitectural+polarization+in+primary+neurons&rft.au=Greene%2C+Adrienne+C%3BWashburn%2C+Cody+M%3BBachand%2C+George+D%3BJames%2C+Conrad+D&rft.aulast=Greene&rft.aufirst=Adrienne&rft.date=2011-12-01&rft.volume=32&rft.issue=34&rft.spage=8860&rft.isbn=&rft.btitle=&rft.title=Biomaterials&rft.issn=01429612&rft_id=info:doi/10.1016%2Fj.biomaterials.2011.08.003 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-11-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Hippocampus; Surface area; Axon guidance; Hydrophobicity; Cell culture; Dendrites; Polarization; Poly-L-lysine; Differentiation; Neurons; Cell body; Axonogenesis; Polarity; Acetone; Maturity; Nodes; Pyramidal cells; Topography DO - http://dx.doi.org/10.1016/j.biomaterials.2011.08.003 ER - TY - JOUR T1 - Model resolution, model covariance, and travel time prediction uncertainty for a global tomographic P-velocity model AN - 1824215342; 2016-084051 AB - Global 3D models of the compression wave speed in the Earth can provide superior travel time predictions at both regional and teleseismic distances. However, given the variable data quality and highly uneven data sampling associated with this type of model, the uncertainty of predicted travel times computed through these models will vary significantly with position in the Earth. Seismic event location codes require good estimates of the prediction uncertainty in order to apply appropriate weights to the various observations used to compute the locations and to calculate reliable estimates of the uncertainty of the resulting locations. The approach that we are adopting is to calculate prediction uncertainties from the tomographic matrices. Quantities that are computed along the way include the model resolution matrix, the model covariance matrix and, finally, the travel time uncertainties. We have found it necessary to include a previously ignored term in the determination of the model covariance matrix that we call the 'a priory covariance of the change in slowness', which we will describe in detail. We will also show results of all of these quantities obtained by applying the calculations to our SALSA3D model, a global P-velocity model of the Earth's mantle. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Ballard, S AU - Young, C J AU - Hipp, J R AU - Encarnacao, A AU - Chang, M AU - Begnaud, M L AU - Phillips, W S AU - Anderson, D AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract S51D EP - 01 PB - American Geophysical Union, Washington, DC VL - 2011 KW - tomography KW - P-waves KW - body waves KW - monitoring KW - Earth KW - statistical analysis KW - prediction KW - elastic waves KW - teleseismic signals KW - models KW - phase velocity KW - earthquake prediction KW - traveltime KW - velocity KW - seismic waves KW - covariance analysis KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1824215342?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Model+resolution%2C+model+covariance%2C+and+travel+time+prediction+uncertainty+for+a+global+tomographic+P-velocity+model&rft.au=Ballard%2C+S%3BYoung%2C+C+J%3BHipp%2C+J+R%3BEncarnacao%2C+A%3BChang%2C+M%3BBegnaud%2C+M+L%3BPhillips%2C+W+S%3BAnderson%2C+D%3BAnonymous&rft.aulast=Ballard&rft.aufirst=S&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-09-29 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - body waves; covariance analysis; Earth; earthquake prediction; elastic waves; models; monitoring; P-waves; phase velocity; prediction; seismic waves; statistical analysis; teleseismic signals; tomography; traveltime; velocity ER - TY - JOUR T1 - Influence of intermediate principal stress on deformation band formation in porous sandstone AN - 1812216023; 2016-071179 AB - In recent years, field observations of volumetric deformation bands (compaction bands and dilation bands) have prompted renewed laboratory and theoretical research efforts to understand conditions for deformation band formation. Historically, laboratory experiments have been conducted on cylindrical cores using axisymmetric stress states, where the intermediate principal stress is equal to either minimum or maximum compression. While experimentally convenient, it is not clear that these specialized stress states are common in field settings, where the intermediate principal stress likely falls between minimum and maximum compression. Additionally, theoretical predictions developed using a bifurcation approach to strain localization (Rudnicki and Rice, 1975) suggest that the deformation band type predicted to form (compaction, compactant shear, dilatant shear, dilation), and the orientation of the band relative to maximum compression, both depend on the magnitude of the intermediate principal stress relative to maximum and minimum compression. To examine the role of the intermediate principal stress in deformation band formation, a suite of true triaxial tests were conducted on Castlegate sandstone; this paper focuses on comparing theoretical predictions with experimental observations. Tests covered a wide range of mean stresses, from dilatant to compactant response. For a given mean stress, five stress states were tested, in which the intermediate principal stress was: A) equal to minimum compression, B) greater than the minimum but less than halfway to maximum compression, C) halfway between minimum and maximum compression, D) greater than halfway but less than maximum compression, and E) equal to maximum compression. Overall, reasonable agreement was found between predicted and observed band angles (defined as the angle between the band normal and maximum compression). Low mean stress tests produced the predicted high angles bands; at intermediate stresses, predicted and observed band angles were lower. For a given mean stress, theory predicts that band angles should increase for a series of tests with increasing intermediate principal stresses; (i.e., band angle for test E is predicted to be higher than D, etc.). Experimentally, this trend was observed, providing preliminary confirmation that the intermediate principal stress does influence the band orientation. Future work will examine deformation inside the band to assess the relationship between intermediate principal stress and band type (compaction, dilation, shear). Understanding the relationships between band type, band orientation and intermediate principal stress could ultimately aid in interpretation of deformation bands in field settings. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Issen, K A AU - Ingraham, M D AU - Dewers, T A AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract T33C EP - 2431 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - experimental studies KW - Castlegate Sandstone KW - Cretaceous KW - stress KW - banded materials KW - deformation KW - compactness KW - Upper Cretaceous KW - Mesozoic KW - cores KW - rock mechanics KW - laboratory studies KW - shear KW - compression KW - 30:Engineering geology KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812216023?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Influence+of+intermediate+principal+stress+on+deformation+band+formation+in+porous+sandstone&rft.au=Issen%2C+K+A%3BIngraham%2C+M+D%3BDewers%2C+T+A%3BAnonymous&rft.aulast=Issen&rft.aufirst=K&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-08-18 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - banded materials; Castlegate Sandstone; compactness; compression; cores; Cretaceous; deformation; experimental studies; laboratory studies; Mesozoic; rock mechanics; shear; stress; United States; Upper Cretaceous ER - TY - JOUR T1 - Failure of Castlegate Sandstone under true triaxial loading AN - 1812211399; 2016-071178 AB - Understanding the stress conditions that cause deformation bands to form can provide insight into the geologic processes in a given location. In particular, understanding the relationship of the intermediate principal stress with respect to maximum and minimum compression when bands form, could provide useful information about the intermediate principal stress in field settings. Therefore, a series of tests were performed to investigate the effect of the intermediate principal stress on the mechanical response and failure of Castlegate sandstone under true triaxial states of stress. Constant mean stress tests were run at five different stress states ranging from: 1) intermediate principal stress equal to minimum compression to 2) intermediate principal stress equal to maximum compression. Failure occurred either through deformation band formation or apparent bulk compaction. Specimens that formed a deformation band experienced a stress drop at band formation. For a given level of intermediate principal stress, the peak stress increases with increasing mean stress. Additionally, as intermediate principal stress increases, the peak stress decreases for a given mean stress. Acoustic emissions (AE) recorded during testing were used to locate failure events in three-dimensional space within the sample. This allowed for more detailed investigation of the formation and propagation of the band(s) within the specimen. In specimens that appear to have undergone bulk compaction, AE events were randomly distributed throughout the sample. For specimens with bands, the band angles were measured as the angle between the maximum principal stress direction and the normal to the band that formed. Band angles tend to increase with increasing intermediate principal stress, and decrease with increasing mean stress. Results from the AE data shows that the band angle evolves during testing and the band that is expressed on the surface of the specimen at the conclusion of testing is not always the band that initially formed. AE results also show that low angle bands tend to be more diffuse than higher angle bands. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Ingraham, M D AU - Issen, K A AU - Holcomb, D J AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract T33C EP - 2430 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - programs KW - failures KW - experimental studies KW - Castlegate Sandstone KW - acoustical properties KW - Cretaceous KW - stress KW - mechanical properties KW - deformation KW - research KW - compactness KW - Upper Cretaceous KW - triaxial tests KW - Mesozoic KW - rock mechanics KW - laboratory studies KW - acoustical emissions KW - 30:Engineering geology KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1812211399?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Failure+of+Castlegate+Sandstone+under+true+triaxial+loading&rft.au=Ingraham%2C+M+D%3BIssen%2C+K+A%3BHolcomb%2C+D+J%3BAnonymous&rft.aulast=Ingraham&rft.aufirst=M&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-08-18 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - acoustical emissions; acoustical properties; Castlegate Sandstone; compactness; Cretaceous; deformation; experimental studies; failures; laboratory studies; mechanical properties; Mesozoic; programs; research; rock mechanics; stress; triaxial tests; United States; Upper Cretaceous ER - TY - JOUR T1 - Node Resource Manager; a distributed computing software framework used for solving geophysical problems AN - 1765874788; 2016-015210 AB - With the rapid growth of multi-core computing hardware, it is now possible for scientific researchers to run complex, computationally intensive software on affordable, in-house commodity hardware. Multi-core CPUs (Central Processing Unit) and GPUs (Graphics Processing Unit) are now commonplace in desktops and servers. Developers today have access to extremely powerful hardware that enables the execution of software that could previously only be run on expensive, massively-parallel systems. It is no longer cost-prohibitive for an institution to build a parallel computing cluster consisting of commodity multi-core servers. In recent years, our research team has developed a distributed, multi-core computing system and used it to construct global 3D earth models using seismic tomography. Traditionally, computational limitations forced certain assumptions and shortcuts in the calculation of tomographic models; however, with the recent rapid growth in computational hardware including faster CPU's, increased RAM, and the development of multi-core computers, we are now able to perform seismic tomography, 3D ray tracing and seismic event location using distributed parallel algorithms running on commodity hardware, thereby eliminating the need for many of these shortcuts. We describe Node Resource Manager (NRM), a system we developed that leverages the capabilities of a parallel computing cluster. NRM is a software-based parallel computing management framework that works in tandem with the Java Parallel Processing Framework (JPPF, http://www.jppf.org/), a third party library that provides a flexible and innovative way to take advantage of modern multi-core hardware. NRM enables multiple applications to use and share a common set of networked computers, regardless of their hardware platform or operating system. Using NRM, algorithms can be parallelized to run on multiple processing cores of a distributed computing cluster of servers and desktops, which results in a dramatic speedup in execution time. NRM is sufficiently generic to support applications in any domain, as long as the application is parallelizable (i.e., can be subdivided into multiple individual processing tasks). At present, NRM has been effective in decreasing the overall runtime of several algorithms: 1) the generation of a global 3D model of the compressional velocity distribution in the Earth using tomographic inversion, 2) the calculation of the model resolution matrix, model covariance matrix, and travel time uncertainty for the aforementioned velocity model, and 3) the correlation of waveforms with archival data on a massive scale for seismic event detection. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Lawry, B J AU - Encarnacao, A AU - Hipp, J R AU - Chang, M AU - Young, C J AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract IN13A EP - 1321 PB - American Geophysical Union, Washington, DC VL - 2011 KW - tomography KW - distributed processing KW - computer programs KW - Node Resource Manager KW - Java Parallel Processing Framework KW - parallel processing KW - geophysical methods KW - data processing KW - applications KW - algorithms KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765874788?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Node+Resource+Manager%3B+a+distributed+computing+software+framework+used+for+solving+geophysical+problems&rft.au=Lawry%2C+B+J%3BEncarnacao%2C+A%3BHipp%2C+J+R%3BChang%2C+M%3BYoung%2C+C+J%3BAnonymous&rft.aulast=Lawry&rft.aufirst=B&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - algorithms; applications; computer programs; data processing; distributed processing; geophysical methods; Java Parallel Processing Framework; Node Resource Manager; parallel processing; tomography ER - TY - JOUR T1 - Calculating path-dependent travel time prediction variance and covariance for the SALSA3D global tomographic P-velocity model with a distributed parallel multi-core computer AN - 1765872214; 2016-015211 AB - Recently our combined SNL-LANL research team has succeeded in developing a global, seamless 3D tomographic P-velocity model (SALSA3D) that provides superior first P travel time predictions at both regional and teleseismic distances. However, given the variable data quality and uneven data sampling associated with this type of model, it is essential that there be a means to calculate high-quality estimates of the path-dependent variance and covariance associated with the predicted travel times of ray paths through the model. In this paper, we show a methodology for accomplishing this by exploiting the full model covariance matrix. Our model has on the order of 1/2 million nodes, so the challenge in calculating the covariance matrix is formidable: 0.9 TB storage for 1/2 of a symmetric matrix, necessitating an Out-Of-Core (OOC) blocked matrix solution technique. With our approach the tomography matrix (G which includes Tikhonov regularization terms) is multiplied by its transpose (GTG) and written in a blocked sub-matrix fashion. We employ a distributed parallel solution paradigm that solves for (GTG)-1 by assigning blocks to individual processing nodes for matrix decomposition update and scaling operations. We first find the Cholesky decomposition of GTG which is subsequently inverted. Next, we employ OOC matrix multiply methods to calculate the model covariance matrix from (GTG)-1 and an assumed data covariance matrix. Given the model covariance matrix we solve for the travel-time covariance associated with arbitrary ray-paths by integrating the model covariance along both ray paths. Setting the paths equal gives variance for that path. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Hipp, J R AU - Encarnacao, A AU - Ballard, S AU - Young, C J AU - Phillips, W S AU - Begnaud, M L AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract IN13A EP - 1322 PB - American Geophysical Union, Washington, DC VL - 2011 KW - tomography KW - raypaths KW - distributed processing KW - P-waves KW - body waves KW - three-dimensional models KW - global KW - statistical analysis KW - data processing KW - elastic waves KW - teleseismic signals KW - computers KW - regional KW - traveltime KW - parallel processing KW - velocity KW - SALSA3D KW - seismic waves KW - covariance analysis KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765872214?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Calculating+path-dependent+travel+time+prediction+variance+and+covariance+for+the+SALSA3D+global+tomographic+P-velocity+model+with+a+distributed+parallel+multi-core+computer&rft.au=Hipp%2C+J+R%3BEncarnacao%2C+A%3BBallard%2C+S%3BYoung%2C+C+J%3BPhillips%2C+W+S%3BBegnaud%2C+M+L%3BAnonymous&rft.aulast=Hipp&rft.aufirst=J&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - body waves; computers; covariance analysis; data processing; distributed processing; elastic waves; global; P-waves; parallel processing; raypaths; regional; SALSA3D; seismic waves; statistical analysis; teleseismic signals; three-dimensional models; tomography; traveltime; velocity ER - TY - JOUR T1 - Acoustic emission and ultrasonic characterization of Jurassic Navajo Formation deformation during axisymmetric compression testing AN - 1765872147; 2016-015346 AB - Linking continuum-scale and microscale brittle damage in rock remains a challenge impacting CO2 sequestration, secondary recovery, structural monitoring, and other geotechnical engineering applications. We examine if the mode of micromechanical failure scales directly up to continuum-scale damage-induced velocity anisotropy. Axisymmetric drained lab-dry compression experiments are performed on facies of moderately cemented finely laminated quartz arenite from the Jurassic Navajo Formation, a target reservoir rock for CO2 sequestration in Utah. The tests are 1 unconfined uniaxial compression test, 1 hydrostatic compression test, and 3 triaxial compression tests. Microscale damage is monitored using acoustic emissions (AE) and continuum scale damage is monitored with ultrasonic velocity scans. During the non-hydrostatic tests, three to five unload loops are performed pre-failure, with one unload loop performed post-failure. While stresses are increasing, AEs are monitored continuously using 1.6-mm diameter, 0.5-mm thick PZT-5A pins attached circumferentially around the cylindrical sample, and with 6-mm diameter, 2-mm thick PZT-5A discs at the ends of the sample. Before and after each unload loop, the test is paused and the AE transducers sequentially emit an ultrasonic pulse to measure wave speeds. The resulting elastic wave is detected by the other AE transducers. Post-test, the changing anisotropic velocity structure of the rock during compression and failure is compared to the locations, frequency, and relative moment tensors of the AEs measured between ultrasonic scans. Pre- and post-test visual and x-ray CT scan observations of the sample are compared to the acoustic metrics. These tiered observations of rock damage will further elucidate the scaling of microscale brittle failure to the continuum-scale This work was supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Rinehart, A J AU - Dewers, T A AU - Holcomb, D J AU - Broome, S T AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract T33C EP - 2418 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - carbon sequestration KW - underground storage KW - Jurassic KW - injection KW - characterization KW - Navajo Sandstone KW - elastic waves KW - deformation KW - ultrasonic methods KW - Mesozoic KW - uniaxial tests KW - rock mechanics KW - reservoir rocks KW - carbon dioxide KW - velocity structure KW - underground installations KW - transducers KW - Utah KW - compression KW - acoustical emissions KW - anisotropy KW - 30:Engineering geology KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765872147?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Acoustic+emission+and+ultrasonic+characterization+of+Jurassic+Navajo+Formation+deformation+during+axisymmetric+compression+testing&rft.au=Rinehart%2C+A+J%3BDewers%2C+T+A%3BHolcomb%2C+D+J%3BBroome%2C+S+T%3BAnonymous&rft.aulast=Rinehart&rft.aufirst=A&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-05-19 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - acoustical emissions; anisotropy; carbon dioxide; carbon sequestration; characterization; compression; deformation; elastic waves; injection; Jurassic; Mesozoic; Navajo Sandstone; reservoir rocks; rock mechanics; transducers; ultrasonic methods; underground installations; underground storage; uniaxial tests; United States; Utah; velocity structure ER - TY - JOUR T1 - Connecting microstructural attributes and macroscopic permeability of a natural shear-enhanced compaction band using multiscale computations AN - 1765869515; 2016-015348 AB - Tomographic images have been taken inside and outside a shear enhanced compaction band in a field specimen of Aztec sandstone. These images are analyzed using an integrated method that incorporated concepts from graph theory, level sets, and hybrid lattice Boltzmann/finite element techniques. Multi-scale flow simulation results reveal approximately an order of magnitude permeability reduction normal to the shear enhanced compaction band. This is less than the several orders of magnitude reduction measured from hydraulic experiments on compaction bands formed in laboratory experiments and about one order of magnitude less than inferences from two-dimensional images of Aztec sandstone. Surprisingly, the permeability parallel to the shear band is also reduced by an order of magnitude, and, hence, the band does not provide a channel for enhanced flow. Geometrical analysis concludes that the elimination of connected pore space and increased tortuosity due to the porosity decrease are major factors contributing to the permeability reduction. In addition, permeability calculations are conducted at various image resolutions to quantify how limitations on resolution of tomographic images affect the accuracy of the predictions. JF - American Geophysical Union Fall Meeting AU - Sun, W AU - Andrade, J AU - Rudnicki, J W AU - Eichhubl, Peter AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract T33C EP - 2420 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - tomography KW - imagery KW - experimental studies KW - Jurassic KW - sandstone KW - porous materials KW - fluid dynamics KW - simulation KW - Mesozoic KW - rock mechanics KW - California KW - laboratory studies KW - finite element analysis KW - sedimentary rocks KW - Aztec Sandstone KW - clastic rocks KW - permeability KW - 30:Engineering geology KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765869515?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Connecting+microstructural+attributes+and+macroscopic+permeability+of+a+natural+shear-enhanced+compaction+band+using+multiscale+computations&rft.au=Sun%2C+W%3BAndrade%2C+J%3BRudnicki%2C+J+W%3BEichhubl%2C+Peter%3BAnonymous&rft.aulast=Sun&rft.aufirst=W&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - Aztec Sandstone; California; clastic rocks; experimental studies; finite element analysis; fluid dynamics; imagery; Jurassic; laboratory studies; Mesozoic; permeability; porous materials; rock mechanics; sandstone; sedimentary rocks; simulation; tomography; United States ER - TY - JOUR T1 - Laboratory testing of Waste Isolation Pilot Plant surrogate waste materials AN - 1707530216; 2015-079529 AB - The Waste Isolation Pilot Plant (WIPP) is a U. S. Department of Energy geological repository for the permanent disposal of defense-related transuranic (TRU) waste. The waste is emplaced in rooms excavated in the bedded Salado salt formation at a depth of 655 m below the ground surface. After emplacement of the waste, the repository will be sealed and decommissioned. WIPP Performance Assessment modeling of the underground material response requires a full and accurate understanding of coupled mechanical, hydrological, and geochemical processes and how they evolve with time. This study was part of a broader test program focused on room closure, specifically the compaction behavior of waste and the constitutive relations to model this behavior. The goal of this study was to develop an improved waste constitutive model. The model parameters are developed based on a well designed set of test data. The constitutive model will then be used to realistically model evolution of the underground and to better understand the impacts on repository performance. The present study results are focused on laboratory testing of surrogate waste materials. The surrogate wastes correspond to a conservative estimate of the degraded containers and TRU waste materials after the 10,000 year regulatory period. Testing consists of hydrostatic, uniaxial, and triaxial tests performed on surrogate waste recipes that were previously developed by Hansen et al. (1997). These recipes can be divided into materials that simulate 50% and 100% degraded waste by weight. The percent degradation indicates the anticipated amount of iron corrosion, as well as the decomposition of cellulosics, plastics, and rubbers. Axial, lateral, and volumetric strain and axial and lateral stress measurements were made. Two unique testing techniques were developed during the course of the experimental program. The first involves the use of dilatometry to measure sample volumetric strain under a hydrostatic condition. Bulk moduli of the samples measured using this technique were consistent with those measured using more conventional methods. The second technique involved performing triaxial tests under lateral strain control. By limiting the lateral strain to zero by controlling the applied confining pressure while loading the specimen axially in compression, one can maintain a right-circular cylindrical geometry even under large deformations. This technique is preferred over standard triaxial testing methods which result in inhomogeneous deformation or "barreling". Manifestations of the inhomogeneous deformation included non-uniform stress states, as well as unrealistic Poisson's ratios (> 0.5) or those that vary significantly along the length of the specimen. Zero lateral strain controlled tests yield a more uniform stress state, and admissible and uniform values of Poisson's ratio. Hansen, F. D., Knowles, M. K., et al. 1997. Description and Evaluation of a Mechanistically Based Conceptual Model for Spall. SAND97-1369. Sandia National Laboratories, Albuquerque. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Broome, S AU - Bronowski, D AU - Pfeifle, T AU - Herrick, C G AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract MR53A EP - 08 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - high-level waste KW - experimental studies KW - degradation KW - strain KW - Eddy County New Mexico KW - Paleozoic KW - stress KW - coupling KW - mechanical properties KW - New Mexico KW - deformation KW - Permian KW - triaxial tests KW - uniaxial tests KW - rock mechanics KW - models KW - laboratory studies KW - Upper Permian KW - Waste Isolation Pilot Plant KW - underground disposal KW - Salado Formation KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707530216?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Laboratory+testing+of+Waste+Isolation+Pilot+Plant+surrogate+waste+materials&rft.au=Broome%2C+S%3BBronowski%2C+D%3BPfeifle%2C+T%3BHerrick%2C+C+G%3BAnonymous&rft.aulast=Broome&rft.aufirst=S&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - coupling; deformation; degradation; Eddy County New Mexico; experimental studies; high-level waste; laboratory studies; mechanical properties; models; New Mexico; Paleozoic; Permian; rock mechanics; Salado Formation; strain; stress; triaxial tests; underground disposal; uniaxial tests; United States; Upper Permian; Waste Isolation Pilot Plant ER - TY - JOUR T1 - Detecting repeated seismicity in the Tohoku-Oki earthquake using waveform correlation AN - 1707524118; 2015-082962 AB - The Tohoku-Oki earthquake generated a tremendous number of aftershocks. Fortunately, the high degree of waveform similarity expected within aftershock sequences offers a way to process these events more quickly and robustly than is possible using traditional methods (e.g. STA/LTA detection). Previously we have discussed our Waveform Correlation Detector which detects and clusters similar events during an aftershock sequence. Our system compares incoming waveform data at one station to a continuously updating library of waveforms from known events. Incoming waveform data that correlates above a specified threshold with a library event is marked as a repeating event and assigned to a family of similar waveforms. Using our detector on other large earthquake sequences (Northridge, Kashmir, Wenchuan), we have shown that 47%-92% of the events in the sequence can be recognized as repeating events. We will demonstrate the results of applying our Waveform Correlation Detector on the Tohuku-Oki aftershocks. We will discuss the number of events detected as repeated events, and the characteristics of the family groups. Results will be analyzed in terms of location along the fault, rate of activity of families in time, and improved efficiency in detection. JF - American Geophysical Union Fall Meeting AU - Carr, D B AU - Slinkard, M AU - Stephen, H AU - Young, C J AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract U51B EP - 0010 PB - American Geophysical Union, Washington, DC VL - 2011 KW - Tohoku-Oki earthquake 2011 KW - Far East KW - data processing KW - elastic waves KW - correlation KW - waveforms KW - Tohoku KW - aftershocks KW - seismicity KW - seismic waves KW - Honshu KW - Asia KW - earthquakes KW - Japan KW - faults KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707524118?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Detecting+repeated+seismicity+in+the+Tohoku-Oki+earthquake+using+waveform+correlation&rft.au=Carr%2C+D+B%3BSlinkard%2C+M%3BStephen%2C+H%3BYoung%2C+C+J%3BAnonymous&rft.aulast=Carr&rft.aufirst=D&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2011/FM/sections/U/sessions/U51B/abstracts/U51B-0010.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - SuppNotes - Accessed on Sept. 9, 2014 N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - aftershocks; Asia; correlation; data processing; earthquakes; elastic waves; Far East; faults; Honshu; Japan; seismic waves; seismicity; Tohoku; Tohoku-Oki earthquake 2011; waveforms ER - TY - JOUR T1 - Behavior of water in supercritical CO (sub 2) ; adsorption and capillary condensation in porous media AN - 1703685944; 2015-077298 AB - The chemical potential of water in supercritical CO (sub 2) (scCO (sub 2) ) may play an important role in water adsorption, capillary condensation, and evaporation under partially saturated conditions at geologic CO (sub 2) storage sites, especially if initially anhydrous CO (sub 2) is injected. Such processes may affect residual water saturations, relative permeability, shrink/swell of clays, and colloidal transport. We have developed a thermodynamic model of water or brine film thickness as a function of water relative humidity in scCO (sub 2) . The model is based on investigations of liquid water configuration in the vadose zone and uses the augmented Young-Laplace equation, which incorporates both adsorptive and capillary components. The adsorptive component is based on the concept of disjoining pressure, which reflects force per area normal to the solid and water/brine-scCO (sub 2) interfaces. The disjoining pressure includes van der Waals, electrostatic, and structural interactions. The van der Waals term includes the effects of mutual dissolution of CO (sub 2) and water in the two fluid phases on partial molar volumes, dielectric coefficients, and refractive indices. Our approach treats the two interfaces as asymmetric surfaces in terms of charge densities and electrostatic potentials. We use the disjoining pressure isotherm to evaluate the type of wetting (e.g., total or partial wetting) for common reservoir and caprock minerals and kerogen. The capillary component incorporates water activity and is applied to simple pore geometries with slits and corners. Finally, we compare results of the model to a companion study by the coauthors on measurement of water adsorption to mineral phases using a quartz-crystal microbalance. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Heath, J E AU - Bryan, C R AU - Dewers, T A AU - Wang, Y AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract V21A EP - 2476 PB - American Geophysical Union, Washington, DC VL - 2011 KW - water KW - carbon sequestration KW - numerical models KW - supercritical materials KW - engineering properties KW - condensation KW - porous materials KW - gas storage KW - capillary water KW - adsorption KW - carbon dioxide KW - reservoir properties KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703685944?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Behavior+of+water+in+supercritical+CO+%28sub+2%29+%3B+adsorption+and+capillary+condensation+in+porous+media&rft.au=Heath%2C+J+E%3BBryan%2C+C+R%3BDewers%2C+T+A%3BWang%2C+Y%3BAnonymous&rft.aulast=Heath&rft.aufirst=J&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2011/FM/sections/V/sessions/V21A/abstracts/V21A-2476.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - SuppNotes - Accessed on Sept. 24, 2014 N1 - Last updated - 2015-08-13 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - adsorption; capillary water; carbon dioxide; carbon sequestration; condensation; engineering properties; gas storage; numerical models; porous materials; reservoir properties; supercritical materials; water ER - TY - JOUR T1 - Breaking it into pieces for storage; an engineering approach to enhancing supercritical CO (sub 2) entrapment AN - 1703685706; 2015-077250 AB - Geologic carbon sequestration and storage (CSS) is a possible option for the mitigation of carbon dioxide (CO (sub 2) ) emissions to the atmosphere. Residual trapping of a non-wetting liquid phase in a brine reservoir is considered as an important mechanism for long-term CSS, because similar processes have been observed in a variety of fields such as oil recovery and groundwater remediation of non-aqueous phase liquids. Residual trapping can potentially relax stringent requirements for the integrity of cap rocks and allow utilization of open or dipping structures for carbon storage. Here, we propose an engineering approach to enhancing the immobilization of supercritical CO (sub 2) (scCO (sub 2) ) in a brine reservoir. This approach is based on the concept of viscous instability of immiscible flow and the dynamics of the movement of scCO (sub 2) ganglia in porous media. The movement of a non-wetting ganglion is inversely dependent on its dimension: the smaller the ganglion, the more difficult to move. The critical size (l (sub c) ) for a ganglion to become immobilized, given its buoyancy, is determined by: l (sub c) =2beta sigma /(rk (sub rw) Delta rho g) where beta is the geometric factor characterizing the grain size and pore neck radius (r), sigma is the interfacial tension between scCO (sub 2) and water, rk (sub rw) is the relative permeability to water, Delta rho is the density difference between water and scCO (sub 2) , and g is the gravity. This suggests that, by dispersing injected scCO (sub 2) into small ganglia, we can potentially immobilize the injected scCO (sub 2) for very long times. The dispersal of scCO (sub 2) into small ganglia could be accomplished by controlling the injection rate and the alternating injection of scCO (sub 2) and water. The injection rate is required to be high enough to ensure the scCO (sub 2) at the advancing front to be broken into pieces, small enough for immobilization, through viscous instability: v>(2pi (super 2) r (super 2) krk (sub rw) Delta rho (super 2) g (super 2) )/(mu beta (super 2) sigma ) where v is the velocity of the advancement of scCO2 front, k is the permeability of water and mu is the viscosity of water. Spatial heterogeneity within a geologic formation also affects the stability of the advancing front, and scCO (sub 2) migration and immobilization. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration. This work is supported by DOE Sandia LDRD Program. JF - American Geophysical Union Fall Meeting AU - Wang, Y AU - Bryan, C R AU - Dewers, T A AU - Heath, J E AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract V13E EP - 04 PB - American Geophysical Union, Washington, DC VL - 2011 KW - water KW - methods KW - carbon sequestration KW - density KW - supercritical materials KW - gas storage KW - fluid dynamics KW - carbon dioxide KW - fluid injection KW - viscosity KW - brines KW - permeability KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703685706?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Breaking+it+into+pieces+for+storage%3B+an+engineering+approach+to+enhancing+supercritical+CO+%28sub+2%29+entrapment&rft.au=Wang%2C+Y%3BBryan%2C+C+R%3BDewers%2C+T+A%3BHeath%2C+J+E%3BAnonymous&rft.aulast=Wang&rft.aufirst=Y&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2011/FM/sections/V/sessions/V13E/abstracts/V13E-04.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - SuppNotes - Accessed on Sept. 24, 2014 N1 - Last updated - 2015-08-13 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - brines; carbon dioxide; carbon sequestration; density; fluid dynamics; fluid injection; gas storage; methods; permeability; supercritical materials; viscosity; water ER - TY - JOUR T1 - Measuring water adsorption on mineral surfaces in air, CO2, and supercritical CO2 with a quartz-crystal microbalance AN - 1703685436; 2015-077274 AB - Carbon sequestration via underground storage in geologic formations is a proposed approach for reducing industrial CO2 emissions. However, current models for carbon injection and long-term storage of supercritical CO2 (scCO2) do not consider the development and stability of adsorbed water films at the scCO2-hydrophilic mineral interface. The thickness and properties of the water films control the surface tension and wettability of the mineral surface, and on the core scale, affect rock permeability, saturation, and capillary properties. The film thickness is strongly dependent upon the activity of water in the supercritical fluid, which will change as initially anhydrous scCO2 absorbs water from formation brine. As described in a companion paper by the coauthors, the thickness of the adsorbed water layer is controlled by the disjoining pressure; structural and van der Waals components dominate at low water activity, while electrostatic forces become more important with increasing film thickness (higher water activities). As scCO2 water activity and water layer thickness increase, concomitant changes in mineral surface properties and reservoir/caprock hydrologic properties will affect the mobility of the aqueous phase and of scCO2. Moreover, the development of a water layer may be critical to mineral dissolution reactions in scCO2. Here, we describe the use of a quartz-crystal microbalance (QCM) to monitor adsorption of water by mineral surfaces. QCMs utilize a piezoelectrically-stimulated quartz wafer to measure adsorbed or deposited mass via changes in vibrational frequency. When used to measure the mass of adsorbed liquid films, the frequency response of the crystal must be corrected for the viscoelastic, rather than elastic, response of the adsorbed layer. Results are presented for adsorption to silica in N2 and CO2 at one bar, and in scCO2. Additional data are presented for water uptake by clays deposited on a QCM wafer. In this case, water uptake occurs by the combined processes of interlayer cation hydration, surface adsorption, and capillary condensation. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. This work is supported by the DOE Sandia LDRD Program. JF - American Geophysical Union Fall Meeting AU - Bryan, C R AU - Wells, R K AU - Burton, P D AU - Heath, J E AU - Dewers, T A AU - Wang, Y AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract V14A EP - 04 PB - American Geophysical Union, Washington, DC VL - 2011 KW - water KW - methods KW - clay KW - experimental studies KW - carbon sequestration KW - supercritical materials KW - clastic sediments KW - mineral-water interface KW - adsorption KW - carbon dioxide KW - laboratory studies KW - silica KW - sediments KW - quartz-crystal microbalances KW - instruments KW - 30:Engineering geology KW - 02B:Hydrochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1703685436?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Measuring+water+adsorption+on+mineral+surfaces+in+air%2C+CO2%2C+and+supercritical+CO2+with+a+quartz-crystal+microbalance&rft.au=Bryan%2C+C+R%3BWells%2C+R+K%3BBurton%2C+P+D%3BHeath%2C+J+E%3BDewers%2C+T+A%3BWang%2C+Y%3BAnonymous&rft.aulast=Bryan&rft.aufirst=C&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2011/FM/sections/V/sessions/V14A/abstracts/V14A-04.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - SuppNotes - Accessed on Sept. 24, 2014 N1 - Last updated - 2015-08-13 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - adsorption; carbon dioxide; carbon sequestration; clastic sediments; clay; experimental studies; instruments; laboratory studies; methods; mineral-water interface; quartz-crystal microbalances; sediments; silica; supercritical materials; water ER - TY - JOUR T1 - Bayesian inference of multiscale structures in porous media AN - 1696872250; 2015-065712 AB - We demonstrate how to probabilistically infer properties of a porous medium, in particular, their spatial variations with a model that only partially resolves them. We consider a binary porous medium, with a spatially varying proportion of the high permeability phase such that inclusions of either phase can be embedded within each other. The inclusions are too small to be resolved with a mesh and are distributed in an uneven fashion in the entire domain. Available data include measurements of upscaled permeability at a handful of locations in the domain, as well as breakthrough times from a tracer test. We use these observations to reconstruct the spatial distribution of the proportions of the phases in the domain, and to estimate the size of the unresolved inclusions. We overlay a coarse 30 X 20 Cartesian mesh on the region of interest and use it to impose a separation of scales. The inclusions, which are about ten times smaller than the mesh resolution, form the fine-scale. Their spatial distribution can be resolved by the mesh and is the coarse-scale variable. The proportionality field and the inclusion size are the targets of the inversion. The key to this multiscale inversion lies in constructing a parametric subgrid model that links the coarse- and fine-scales together. We do so by exploiting elements of truncated Gaussian random fields and Poisson point-processes to represent inclusions geometrically. Existing distance-based upscaling theory of binary media is used to create a model for effective permeability of a mesh gridblock. The inference is performed by solving a Bayesian inverse problem, predicated on sparse observations. The high-permeability proportionality field is modeled as a multiGaussian and approximated as a 30-term Karhunen-Loeve (KL) expansion. Darcy flow is used to estimate breakthrough times, given an upscaled permeability field. The Bayesian inverse problem is solved using an adaptive Markov chain Monte Carlo method for 30 KL mode weights and a lengthscale proxy for the inclusion size. Probability density functions are developed for the quantities being inferred. We use this inversion scheme to investigate the information content of the measurements. The measurements are generated as synthetic data i.e., we have access to the "ground truth". We find that the measurements of upscaled permeability can provide information about the large spatial scales only. The breakthrough times contain information about both large and small-scale resolved spatial structures, but it is difficult to separate the two, without using the permeability measurements simultaneously to constrain the large scale features. We choose twenty samples from the posterior distribution to reconstruct instances of the fine-scale binary media and then use them to predict the flow and breakthrough times. The ensemble of predictions is combined using Bayesian Model Averaging (BMA). We compare the BMA predictions and those from the raw ensemble versus the "ground truth" and find that BMA improves predictions slightly. The problem is redone with fewer samples to gauge the robustness of the BMA predictions. We find that with fewer samples arithmetic averaging provides slightly better predictions than BMA. JF - American Geophysical Union Fall Meeting AU - Lefantzi, S AU - McKenna, S A AU - Ray, J AU - van Bloemen Waanders, B AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H11J EP - 06 PB - American Geophysical Union, Washington, DC VL - 2011 KW - hydraulics KW - Bayesian analysis KW - Darcy's law KW - Monte Carlo analysis KW - statistical analysis KW - fluid flow KW - fluid dynamics KW - porosity KW - spatial variations KW - probability KW - permeability KW - Markov chain analysis KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696872250?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Bayesian+inference+of+multiscale+structures+in+porous+media&rft.au=Lefantzi%2C+S%3BMcKenna%2C+S+A%3BRay%2C+J%3Bvan+Bloemen+Waanders%2C+B%3BAnonymous&rft.aulast=Lefantzi&rft.aufirst=S&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-17 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - Bayesian analysis; Darcy's law; fluid dynamics; fluid flow; hydraulics; Markov chain analysis; Monte Carlo analysis; permeability; porosity; probability; spatial variations; statistical analysis ER - TY - JOUR T1 - Predictive uncertainty analysis of a highly heterogeneous field-scale groundwater model using null-space Monte Carlo AN - 1686063390; 2015-050306 AB - Quantification of prediction uncertainty resulting from estimated parameters is critical to provide accurate predictive models for field-scale groundwater flow and transport problems. We examine and compare two approaches to defining predictive uncertainty where both approaches utilize pilot points to parameterize spatially heterogeneous fields. The first approach is the independent calibration of multiple initial "seed" fields created through geostatistical simulation and conditioned to observation data, resulting in an ensemble of calibrated property fields that defines uncertainty in the calibrated parameters. The second approach is the null-space Monte Carlo (NSMC) method that employs a decomposition of the Jacobian matrix from a single calibration to define a minimum number of linear combinations of parameters that account for the majority of the sensitivity of the overall calibration to the observed data. Random vectors are applied to the remaining linear combinations of parameters, the null space, to create an ensemble of fields, each of which remains calibrated to the data. We compare these two approaches using a highly-parameterized groundwater model of the Culebra dolomite in southeastern New Mexico. Observation data include two decades of steady-state head measurements and pumping test results. The predictive performance measure is advective travel time from a point to a prescribed boundary. Calibrated parameters at a set of pilot points include transmissivity, the horizontal hydraulic anisotropy, the storativity, and a section of recharge (> 1200 parameters in total). First, we calibrate 200 multiple random seed fields generated through geostatistical simulation conditioned to observation data. The 11 fields that contain the best and worst scenarios in terms of calibration and travel time analysis among the best 100 calibrated results provide a basis for the NSMC method. The NSMC method is used to generate 200 calibration-constrained parameter fields from each of the 11 selected fields, which are used to quantify predictive uncertainty. In particular, the effect of the dimensionality of the solution space on calibration and predictive uncertainty is evaluated for both methods. Comparison of the NSMC and multiple starting fields methods defines the effectiveness of the NSMC method. The strategy of selecting the calibrated fields for input to the NSMC method will be discussed from the perspective of developing a practical means of addressing uncertainty without having 100's of calibrations from multiple starting fields. This material is based upon work supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Hart, D AU - Yoon, H AU - McKenna, S A AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H12D EP - 05 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - Paleozoic KW - Monte Carlo analysis KW - statistical analysis KW - prediction KW - geostatistics KW - storage coefficient KW - New Mexico KW - simulation KW - Permian KW - ground water KW - flows KW - pump tests KW - recharge KW - transport KW - isotropy KW - hydrodynamics KW - hydraulic conductivity KW - Culebra Dolomite Member KW - uncertainty KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686063390?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Predictive+uncertainty+analysis+of+a+highly+heterogeneous+field-scale+groundwater+model+using+null-space+Monte+Carlo&rft.au=Hart%2C+D%3BYoon%2C+H%3BMcKenna%2C+S+A%3BAnonymous&rft.aulast=Hart&rft.aufirst=D&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-06-05 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - Culebra Dolomite Member; flows; geostatistics; ground water; hydraulic conductivity; hydrodynamics; isotropy; Monte Carlo analysis; New Mexico; Paleozoic; Permian; prediction; pump tests; recharge; simulation; statistical analysis; storage coefficient; transport; uncertainty; United States ER - TY - JOUR T1 - Quantitative risk assessment for enhanced geothermal systems AN - 1686059678; 2015-050359 AB - This study uses a quantitative risk-assessment approach to place the uncertainty associated with enhanced geothermal systems (EGS) development into meaningful context and to identify points of attack that can reduce risk the most. Using the integrated geothermal assessment tool, GT-Mod, we calculate the complimentary cumulative distribution function of the levelized cost of electricity (LCOE) that results from uncertainty in a variety of geologic and economic input parameter values. EGS is a developing technology that taps deep (2-10km) geologic heat sources for energy production by "enhancing" non-permeable hot rock through hydraulic stimulation. Despite the promise of EGS, uncertainties in predicting the physical end economic performance of a site has hindered its development. To address this, we apply a quantitative risk-assessment approach that calculates risk as the sum of the consequence, C, multiplied by the range of the probability, Delta P, over all estimations of a given exceedance probability, n, over time, t. The consequence here is defined as the deviation from the best estimate LCOE, which is calculated using the "best-guess" input parameter values. The analysis assumes a realistic but fictitious EGS site with uncertainties in the exploration success rate, the sub-surface thermal gradient, the reservoir fracture pattern, and the power plant performance. Uncertainty in the exploration, construction, O&M, and drilling costs are also included. The depth to the resource is calculated from the thermal gradient and a target resource temperature of 225 degrees C. Thermal performance is simulated using the Gringarten analytical solution. The mass flow rate is set to produce 30 MWe of power for the given conditions and is adjusted over time to maintain that rate over the plant lifetime of 30 years. Simulations are conducted using GT-Mod, which dynamically links the physical systems of a geothermal site to simulate, as an integrated, multi-system component, the collective performance of each system over time. It is dynamically linked to the Geothermal Energy Technology Evaluation Model (GETEM - www1.eere.energy.gov/geothermal/getem.html) that calculates the LCOE based on time-series performance output from GT-Mod. A Monte Carlo approach propagates input uncertainties to the output by describing uncertain inputs with probability density functions (PDF's) and then simultaneously varying the PDF's via a Latin Hypercube Sampling (LHS) technique. Exceedance probabilities for the LCOE are calculated as a post-processing exercise. Results show that for the given set of uncertainties, the LCOE assumes a lognormal distribution with the tail skewed towards the higher values and a mean LCOE that is almost 2 cents/kWh higher than the best estimate; this despite the fact that the "best-guess" parameter values are the mean values of the input PDF's. This is a result of component feedback that can amplify the system's dynamics and implies that the best estimate LCOE may considerably under-estimate the risk of developing that site. Correlation analysis indicates that reductions in drilling costs and better characterization of the sub-surface environment will reduce risk the most. JF - American Geophysical Union Fall Meeting AU - Lowry, T S AU - McKenna, S A AU - Hadgu, T AU - Kalinina, E AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H13B EP - 1215 PB - American Geophysical Union, Washington, DC VL - 2011 KW - statistical analysis KW - characterization KW - geothermal engineering KW - enhanced recovery KW - correlation KW - simulation KW - production KW - cost KW - geothermal energy KW - geothermal systems KW - quantitative analysis KW - heat sources KW - risk assessment KW - reservoir properties KW - probability KW - hydraulic conductivity KW - drilling KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686059678?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Quantitative+risk+assessment+for+enhanced+geothermal+systems&rft.au=Lowry%2C+T+S%3BMcKenna%2C+S+A%3BHadgu%2C+T%3BKalinina%2C+E%3BAnonymous&rft.aulast=Lowry&rft.aufirst=T&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-06-05 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - characterization; correlation; cost; drilling; enhanced recovery; geothermal energy; geothermal engineering; geothermal systems; heat sources; hydraulic conductivity; probability; production; quantitative analysis; reservoir properties; risk assessment; simulation; statistical analysis ER - TY - JOUR T1 - The influence of pump-and-treat problem formulation on the performance of a hybrid global-local optimizer AN - 1686058192; 2015-045730 AB - Pump-and-treat systems are a common strategy for groundwater remediation, wherein a system of extraction wells is installed at an affected site to address pollutant migration. In this context, the likely performance of candidate remedial systems is often assessed using groundwater flow modeling. When linked with an optimizer, these models can be utilized to identify a least-cost system design that nonetheless satisfies remediation goals. Moreover, the resulting design problems serve as important tools in the development and testing of optimization algorithms. For example, consider EAGLS (Evolutionary Algorithm Guiding Local Search), a recently developed derivative-free simulation-optimization code that seeks to efficiently solve nonlinear problems by hybridizing local and global search techniques. The EAGLS package was designed to specifically target mixed variable problems and has a limited ability to intelligently adapt its behavior to given problem characteristics. For instance, to solve problems in which there are no discrete or integer variables, the EAGLS code defaults to a multi-start asynchronous parallel pattern search. Therefore, to better understand the behavior of EAGLS, the algorithm was applied to a representative dual-plume pump-and-treat containment problem. A series of numerical experiments were performed involving four different formulations of the underlying pump-and-treat optimization problem, namely: (1) optimization of pumping rates, given fixed number of wells at fixed locations; (2) optimization of pumping rates and locations of a fixed number of wells; (3) optimization of pumping rates and number of wells at fixed locations; and (4) optimization of pumping rates, locations, and number of wells. Comparison of the performance of the EAGLS software with alternative search algorithms across different problem formulations yielded new insights for improving the EAGLS algorithm and enhancing its adaptive behavior. JF - American Geophysical Union Fall Meeting AU - Matott, L S AU - Gray, G A AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H21H EP - 05 PB - American Geophysical Union, Washington, DC VL - 2011 KW - solute transport KW - water quality KW - pump tests KW - migration KW - numerical models KW - transport KW - water treatment KW - pollution KW - optimization KW - simulation KW - remediation KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686058192?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+influence+of+pump-and-treat+problem+formulation+on+the+performance+of+a+hybrid+global-local+optimizer&rft.au=Matott%2C+L+S%3BGray%2C+G+A%3BAnonymous&rft.aulast=Matott&rft.aufirst=L&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-06-05 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - migration; numerical models; optimization; pollution; pump tests; remediation; simulation; solute transport; transport; water quality; water treatment ER - TY - JOUR T1 - Influence of the pressure on a fracture aperture controlling a fracture transmissivity AN - 1673365298; 2015-034694 AB - Groundwater flow through fractures is one of major pathways for radioactive contaminants from a subsurface repository to the biosphere. The cubic law introduces that a small change of the aperture can make a big change in the flow rate thus the transmissivity of a fracture. It is known that a sufficiently large water pressure during hydrofracturing makes a change in a fracture aperture thus a fracture transmissivity, and a small change in water pressure during the hydrogeologic characterization works maybe also affect a fracture aperture. In this study, we evaluate the influence of the water pressure on the fracture aperture with a series of field experiments. For the experiments, a borehole is installed in the KAERI underground research tunnel (KURT), and the test interval is determined through the analyses of borehole logging and hydraulic tests. Then, a double packer system, which is able to directly observe the change of an aperture, is developed and installed in the test borehole. Using the double packer system, the aperture of a fracture in the test interval and the flow rate are observed under various water pressures, and the relation between the water pressure and the aperture is quantified. JF - American Geophysical Union Fall Meeting AU - Ji, S AU - Lee, M AU - Koh, Y AU - Choi, J AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H21B EP - 1083 PB - American Geophysical Union, Washington, DC VL - 2011 KW - hydraulic fracturing KW - fractures KW - water pressure KW - transmissivity KW - biosphere KW - well-logging KW - characterization KW - hydraulic conductivity KW - ground water KW - flows KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673365298?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Influence+of+the+pressure+on+a+fracture+aperture+controlling+a+fracture+transmissivity&rft.au=Ji%2C+S%3BLee%2C+M%3BKoh%2C+Y%3BChoi%2C+J%3BAnonymous&rft.aulast=Ji&rft.aufirst=S&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-16 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - biosphere; characterization; flows; fractures; ground water; hydraulic conductivity; hydraulic fracturing; transmissivity; water pressure; well-logging ER - TY - JOUR T1 - The impact of geologic heterogeneity on CO (sub 2) injection with simultaneous brine extraction and economic uncertainty for large-scale CO (sub 2) sequestration AN - 1664436562; 2015-024846 AB - Performance assessment of CO (sub 2) sequestration opportunities at the scale of the United States presents challenges for coping with geologic and economic uncertainties. Inaccurate estimation of suitable flow properties could result in drilling wells in parts of a formation that could not physically accommodate the needed injection rates and storage volumes. Data paucity and heterogeneity in geologic properties necessitates probabilistic approaches for estimating CO (sub 2) injection and simultaneous brine extraction rates (for beneficial use such as power-plant cooling or pressure management) and associated costs. We present an Integrated Assessment Model (IAM) that assesses CO (sub 2) injection rates with or without simultaneous brine extraction for the saline reservoirs identified in the National Carbon Sequestration Database (NatCarb). We have linked NatCarb reservoirs to injectivity rock types. We define these rock types quantitatively by probability distribution functions (PDFs) of permeability and porosity, and spatial correlation models. Thus, IAM has flexibility in calculating CO (sub 2) injectivity and brine productivity while coping with heterogeneity, and then determining the uncertainty in well-associated costs. For computational efficiency, IAM performs injectivity and productivity calculations with analytical solutions that have been validated by numerical simulation and comparison to available field data. The solutions incorporate spatially varying properties through PDFs that are based on upscaling of geostatistical realizations of the injectivity rock types. A key method of the geostatistics is linear coregionalization, which defines the linear relationship between porosity and log permeability with a specified correlation coefficient, r, of the regression while maintaining the spatial correlation of each variable. The major finding is high sensitivity of well-associated costs to permeability. Error in field prediction of an order of magnitude in permeability may be the difference between an economically and physically viable or unfeasible site due to potentially order of magnitude change in the number of required injection wells. Finally, we present the affects of varying the correlation between permeability and porosity on injectivity and productivity estimates. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Kobos, P H AU - Heath, J E AU - Roach, J D AU - McKenna, S A AU - Dewers, T A AU - Gutierrez, K AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H24B EP - 04 PB - American Geophysical Union, Washington, DC VL - 2011 KW - carbon sequestration KW - numerical models KW - statistical analysis KW - injection KW - power plants KW - geostatistics KW - NatCarb KW - porosity KW - carbon dioxide KW - brines KW - waste disposal KW - saline composition KW - permeability KW - National Carbon Sequestration Database KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664436562?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+impact+of+geologic+heterogeneity+on+CO+%28sub+2%29+injection+with+simultaneous+brine+extraction+and+economic+uncertainty+for+large-scale+CO+%28sub+2%29+sequestration&rft.au=Kobos%2C+P+H%3BHeath%2C+J+E%3BRoach%2C+J+D%3BMcKenna%2C+S+A%3BDewers%2C+T+A%3BGutierrez%2C+K%3BAnonymous&rft.aulast=Kobos&rft.aufirst=P&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2011/FM/sections/H/sessions/H24B/abstracts/H24B-04.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-03-19 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - brines; carbon dioxide; carbon sequestration; geostatistics; injection; NatCarb; National Carbon Sequestration Database; numerical models; permeability; porosity; power plants; saline composition; statistical analysis; waste disposal ER - TY - JOUR T1 - Iodide sorption to clays and the relationship to the surface charge environment AN - 1645575545; 2015-005239 AB - In performance assessments of nuclear waste repositories, iodine-129 is often the major contributor to dose at time scales > or =10,000 years. The breakthrough behavior of iodine is determined by the monovalent, anionic nature and the assumed lack of surface reactivity of the iodide ion. This assumption is corroborated by batch sorption data where iodide sorption to clays is typically very small, and only measurable under specific conditions. This result is consistent with charge repulsion arguments due to the fixed negative charge of clays repelling the anionic iodide. However, in compacted column diffusion experiments, iodide is routinely retarded relative to tritium, and is described with K (sub d) values from nearly equal 0.001-2.9 ml/g. While small, these values can dramatically change the dose profile in performance assessment calculations. We hypothesize that contributions from the basal plane and edge charge of individual clay particles as well as the physical morphology of the clay particles are contributing to the conflicting behavior. In a series of experiments involving a wide range of clay minerals from the clay bank repository, both surface charge and iodide sorption were examined using surface titrations and batch sorption experiments. The clay minerals studied include: kaolinite, ripidolite, illite, montmorillonite, palygorskite, sepiolite, and an illite/smectite mixed layer clay. Each of these clays was characterized using XRD, and surface titrations in 0.01, 0.1, and 0.5 M NaCl electrolyte. The titrations spanned the pH range from 2.5-10.5 and were automated using an autotitrator. For reference, similar titrations were performed on pure forms of an Al-O powder. The titration curves were interpreted using an inversion method to attain the pK (sub a) distribution for each clay and metal oxide at each ionic strength. The pK (sub a) distribution for the Al-O shows two distinct peaks at 4.8 and 7.5, which are invariant with ionic strength. The pK (sub a) distribution of clays was highly variable between the different minerals and, more importantly, the distribution for an individual clay mineral changed as a function of ionic strength. This behavior implies a more complicated vision of clay surface chemistry than traditional surface complexation descriptions allow. Iodide sorption experiments were completed at relatively high solid:solution ratios to exacerbate sorption properties. The results show a range of sorption behaviors across the clay minerals based on solid:solution ratio, pH, and ionic strength. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Miller, A W AU - Wang, Y AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H53I EP - 1525 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - silicates KW - Sandia National Laboratories KW - halides KW - high-level waste KW - sorption KW - experimental studies KW - isotopes KW - iodides KW - complexing KW - halogens KW - radioactive waste KW - clay minerals KW - waste management KW - iodine KW - radioactive isotopes KW - I-129 KW - sheet silicates KW - waste disposal KW - underground disposal KW - diffusivity KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645575545?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Iodide+sorption+to+clays+and+the+relationship+to+the+surface+charge+environment&rft.au=Miller%2C+A+W%3BWang%2C+Y%3BAnonymous&rft.aulast=Miller&rft.aufirst=A&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2011/FM/sections/H/sessions/H53I/abstracts/H53I-1525.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-15 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - clay minerals; complexing; diffusivity; experimental studies; halides; halogens; high-level waste; I-129; iodides; iodine; isotopes; radioactive isotopes; radioactive waste; Sandia National Laboratories; sheet silicates; silicates; sorption; underground disposal; United States; waste disposal; waste management ER - TY - JOUR T1 - The anisotropic, elastic-decohesive constitutive law in CICE; implementation and results AN - 1645571410; 2015-003120 AB - In today's sea ice models, the internal stress, mechanical properties and deformation of the ice pack are typically represented using an isotropic, viscous-plastic-type rheology. In this approach, the ice is in a continual state of plastic flow except when strain rates approach zero as the ice pack becomes rigid. In the latter case, a viscous "creep" behavior is imposed to regularize singularities in the standard viscous-plastic approach; elastic waves regularize the singularities in the elastic-viscous-plastic variant of the model. In contrast, large-scale sea ice observations indicate that the ice moves as large, rigid plates with high shear values along long, narrow fractures between the plates. These fractures often represent open water areas within the ice pack, where ocean-atmosphere fluxes of heat and water predominate. To better represent the dynamics of these important features within the ice pack, we have implemented an anisotropic, fracture-mechanics based constitutive law, the elastic-decohesive rheology, into the Los Alamos Sea Ice Model, CICE. We compare results from this model with the original elastic-viscous-plastic rheology in CICE, with the original elastic-decohesive "MPM" sea ice model (solved with the Material Point Method using Lagrangian particles), and with observed data from the RADARSAT Geophysical Processor System. JF - American Geophysical Union Fall Meeting AU - Hunke, E C AU - Peterson, K J AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract C33G EP - 02 PB - American Geophysical Union, Washington, DC VL - 2011 KW - hydrology KW - cryosphere KW - Los Alamos Sea Ice Model KW - heat flux KW - isotropic materials KW - sea ice KW - CICE KW - stress KW - mechanical properties KW - air-sea interface KW - fluid dynamics KW - deformation KW - hydrosphere KW - models KW - viscosity KW - dynamics KW - rheology KW - ice KW - plasticity KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645571410?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+anisotropic%2C+elastic-decohesive+constitutive+law+in+CICE%3B+implementation+and+results&rft.au=Hunke%2C+E+C%3BPeterson%2C+K+J%3BAnonymous&rft.aulast=Hunke&rft.aufirst=E&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2011/FM/sections/C/sessions/C33G/abstracts/C33G-02.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-15 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - air-sea interface; CICE; cryosphere; deformation; dynamics; fluid dynamics; heat flux; hydrology; hydrosphere; ice; isotropic materials; Los Alamos Sea Ice Model; mechanical properties; models; plasticity; rheology; sea ice; stress; viscosity ER - TY - JOUR T1 - CO (sub 2) injection performance in the Fruitland Coal Fairway, San Juan Basin; results of a field pilot AN - 1637530113; 2014-103216 AB - The Pump Canyon CO (sub 2) -enhanced coalbed methane (ECBM)/sequestration demonstration in New Mexico has the primary objective of demonstrating the feasibility of CO (sub 2) sequestration in deep, unmineable coal seams through a small-scale geologic sequestration pilot. This project is not the first of its kind; several small- or large-scale pilots were already conducted previously in the United States [Allison Unit (Reeves et al. 2003) in the San Juan, Appalachian, and Warrior basins] as well as intemationally [the Recopol (Reeves and Oudinot 2002) project in Poland, and the Yubari project in Japan, Canada, and Australia]. Additional pilots are currently under way. At the project site, a new CO (sub 2) -injection well was drilled within an existing pattern of coalbed-methane-production wells. Primarily operated by ConocoPhillips, these wells produce from the Late Cretaceous Fruitland coals. CO (sub 2) injection into these coal seams was initiated in late July 2008 and ceased in August 2009. A variety of monitoring, verification, and accounting (MVA) methods were employed to track the movement of the CO (sub 2) in order to determine the occurrence of leakage. Within the injection well, MVA methods included continuous measurement of injection volumes, pressures, and temperatures. The offset production wells sampled gas-production rates, pressures, and gas composition through CO (sub 2) sensors, tracers in the injected CO (sub 2) , time-lapse vertical seismic profiling, and surface tiltmeter arrays. A detailed study of the overlying Kirtland shale was also conducted to investigate the integrity of this primary caprock. This information was used to develop a detailed geologic characterization and reservoir model that has been used to further understand the behavior of this reservoir. The CO (sub 2) -injection pilot has ended with no significant CO (sub 2) buildup occurring in the offset production wells. However, a small but steady increase in CO (sub 2) and N (sub 2) at two of the offset wells may have been an indication of imminent breakthrough. More recent gas samples are, however, showing a decrease in CO (sub 2) and N (sub 2) content at those wells. This paper describes the project, covering the regulatory process and injection-well construction, the differ-ent techniques used to monitor for CO (sub 2) leakage, and the results of the modeling work. JF - SPE Journal AU - Oudinot, Anne Y AU - Koperna, George J, Jr AU - Philip, Zeno G AU - Liu, Ning AU - Heath, Jason E AU - Wells, Arthur AU - Young, Genevieve B AU - Wilson, Tom Y1 - 2011/12// PY - 2011 DA - December 2011 SP - 864 EP - 878 PB - Society of Petroleum Engineers, Richardson, TX VL - 16 IS - 4 SN - 1086-055X, 1086-055X KW - United States KW - Rio Arriba County New Mexico KW - La Plata County Colorado KW - Cretaceous KW - natural gas KW - San Juan County New Mexico KW - petroleum KW - gas storage KW - New Mexico KW - coal seams KW - Upper Cretaceous KW - pipelines KW - reservoir rocks KW - carbon dioxide KW - air pollution KW - environmental management KW - sedimentary rocks KW - conservation KW - coal KW - San Juan Basin KW - mining legislation KW - carbon sequestration KW - Pump Canyon KW - Fairway New Mexico KW - pollutants KW - pollution KW - Mesozoic KW - Fruitland Formation KW - gas injection KW - natural resources KW - archaeological sites KW - coalbed methane KW - reservoir properties KW - Colorado KW - 29A:Economic geology, geology of energy sources KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637530113?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=SPE+Journal&rft.atitle=CO+%28sub+2%29+injection+performance+in+the+Fruitland+Coal+Fairway%2C+San+Juan+Basin%3B+results+of+a+field+pilot&rft.au=Oudinot%2C+Anne+Y%3BKoperna%2C+George+J%2C+Jr%3BPhilip%2C+Zeno+G%3BLiu%2C+Ning%3BHeath%2C+Jason+E%3BWells%2C+Arthur%3BYoung%2C+Genevieve+B%3BWilson%2C+Tom&rft.aulast=Oudinot&rft.aufirst=Anne&rft.date=2011-12-01&rft.volume=16&rft.issue=4&rft.spage=864&rft.isbn=&rft.btitle=&rft.title=SPE+Journal&rft.issn=1086055X&rft_id=info:doi/10.2118%2F127073-PA L2 - http://www.spe.org/papers/pubs/SPEjournal.php LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 32 N1 - PubXState - TX N1 - Document feature - illus. incl. 4 tables, sketch map N1 - Last updated - 2014-12-18 N1 - SubjectsTermNotLitGenreText - air pollution; archaeological sites; carbon dioxide; carbon sequestration; coal; coal seams; coalbed methane; Colorado; conservation; Cretaceous; environmental management; Fairway New Mexico; Fruitland Formation; gas injection; gas storage; La Plata County Colorado; Mesozoic; mining legislation; natural gas; natural resources; New Mexico; petroleum; pipelines; pollutants; pollution; Pump Canyon; reservoir properties; reservoir rocks; Rio Arriba County New Mexico; San Juan Basin; San Juan County New Mexico; sedimentary rocks; United States; Upper Cretaceous DO - http://dx.doi.org/10.2118/127073-PA ER - TY - JOUR T1 - Pore-scale simulation of calcium carbonate precipitation and dissolution under highly supersaturated conditions in a microfluidic pore network AN - 1566812364; 2014-074569 AB - Dissolved CO2 during geological CO2 storage may react with minerals in fractured rocks or confined aquifers and cause mineral precipitation. The overall rate of reaction can be affected by coupled processes among hydrodynamics, transport, and reactions at pore-scale. Pore-scale models of coupled fluid flow, reactive transport, and CaCO3 precipitation and dissolution are applied to account for transient experimental results of CaCO3 precipitation and dissolution under highly supersaturated conditions in a microfluidic pore network (i.e., micromodel). Pore-scale experiments in the micromodel are used as a basis for understanding coupled physics of systems perturbed by geological CO2 injection. In the micromodel, precipitation is induced by transverse mixing along the centerline in pore bodies. Overall, the pore-scale model qualitatively captured the governing physics of reactions such as precipitate morphology, precipitation rate, and maximum precipitation area in first few pore spaces. In particular, we found that proper estimation of the effective diffusion coefficient and the reactive surface area is necessary to adequately simulate precipitation and dissolution rates. As the model domain increases, the effect of flow patterns affected by precipitation on the overall reaction rate also increases. The model is also applied to account for the effect of different reaction rate laws on mineral precipitation and dissolution at pore-scale. Reaction rate laws tested include the linear rate law, nonlinear power law, and newly-developed rate law based on in-situ measurements at nano scale in the literature. Progress on novel methods for upscaling pore-scale models for reactive transport are discussed, and are being applied to mineral precipitation patterns observed in natural analogues. H.Y. and T. D. were supported as part of the Center for Frontiers of Subsurface Energy Security, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Yoon, H AU - Dewers, T A AU - Valocchi, A J AU - Werth, C J AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H31E EP - 1217 PB - American Geophysical Union, Washington, DC VL - 2011 KW - fractured materials KW - patterns KW - carbon sequestration KW - confined aquifers KW - injection KW - solutes KW - coupling KW - suspended materials KW - porous materials KW - fluid dynamics KW - ground water KW - carbon dioxide KW - aquifers KW - physical properties KW - chemical reactions KW - transport KW - saturation KW - precipitation KW - reactive transport KW - hydrodynamics KW - calcium carbonate KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566812364?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Pore-scale+simulation+of+calcium+carbonate+precipitation+and+dissolution+under+highly+supersaturated+conditions+in+a+microfluidic+pore+network&rft.au=Yoon%2C+H%3BDewers%2C+T+A%3BValocchi%2C+A+J%3BWerth%2C+C+J%3BAnonymous&rft.aulast=Yoon&rft.aufirst=H&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2011/FM/sections/H/sessions/H31E/abstracts/H31E-1217.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - aquifers; calcium carbonate; carbon dioxide; carbon sequestration; chemical reactions; confined aquifers; coupling; fluid dynamics; fractured materials; ground water; hydrodynamics; injection; patterns; physical properties; porous materials; precipitation; reactive transport; saturation; solutes; suspended materials; transport ER - TY - JOUR T1 - An overview of the source physics experiments (SPE) at the Nevada national security site (NNSS) AN - 1549621275; 2014-056897 AB - Modeling of explosion phenomenology has been primarily empirically based when looking at the seismic, infrasound, and acoustic signals. In order to detect low-yield nuclear explosions under the Comprehensive Nuclear Test-Ban Treaty (CTBT), we must be able to understand and model the explosive source in settings beyond where we have empirical data. The Source Physics Experiments (SPE) at the Nevada National Security Site are the first step in this endeavor to link the empirically based with the physics-based modeling to develop this predictive capability. The current series of tests is being conducted in a granite body called the Climax Stock. This location was chosen for several reasons, including the site's expected "simple geology"--the granite is a fairly homogeneous body. In addition, data are available from underground nuclear tests that were conducted in the same rock body, and the nature of the geology has been well-documented. Among the project goals for the SPE is to provide fully coupled seismic energy to the seismic and acoustic seismic arrays so that the transition between the near and far-field data can be modeled and our scientists can begin to understand how non-linear effects and anisotropy control seismic energy transmission and partitioning. The first shot for the SPE was conducted in May 2011 as a calibration shot (SPE1) with 220 lb (100 kg) of chemical explosives set at a depth of 180 ft (55 m). An array of sensors and diagnostics recorded the shot data, including accelerometers, geophones, rotational sensors, short-period and broadband seismic sensors, Continuous Reflectometry for Radius vs. Time Experiment (CORRTEX), Time of Arrival (TOA), Velocity of Detonation (VOD) as well as infrasound sensors. The three-component accelerometer packages were set at depths of 180 ft (55 m), 150 ft (46 m), and 50 ft (15 m) in two rings around ground zero (GZ); the inner ring was at 10 m and the outer ring was 20 m from GZ. Six sets of surface accelerometers (100 and 500 g) were placed along in an azimuth of SW from GZ every 10 m. Seven infrasound sensors were placed in an array around the GZ, extending from tens of meters to kilometers. Over 100 seismic stations were positioned, most of which were in five radial lines from GZ out to 2 km. Over 400 data channels were recorded for SPE1, and data recovery was about 95% with high signal to noise ratio. Future tests will be conducted in the same shot hole as SPE1. The SPE2 experiment will consist of 2200 lb (1000 kg) of chemical explosives shot at 150 ft (46 m) depth utilizing the above-described instrumentation. Subsequent SPE shots will be the same size, within the same shot hole, and within the damage zone. The ultimate goal of the SPE Project is to develop predictive capability for using seismic energy as a tool for CTBT issues. This work was done by National Security Technologies, LLC, under Contract No. DE AC52 06NA25946 with the U.S. Department of Energy. JF - American Geophysical Union Fall Meeting AU - Snelson, C M AU - Barker, D L AU - White, R L AU - Emmitt, R F AU - Townsend, M J AU - Graves, T E AU - Becker, S A AU - Teel, M G AU - Lee, P AU - Antoun, T H AU - Rodgers, A AU - Walter, W R AU - Mellors, R J AU - Brunish, W M AU - Bradley, C R AU - Patton, H J AU - Hawkins, W L AU - Corbell, B H AU - Abbott, R E AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract S42A EP - 02 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - experimental studies KW - explosions KW - igneous rocks KW - Climax Porphyry KW - granites KW - geophysical methods KW - seismic sources KW - seismic methods KW - Cenozoic KW - Nevada Test Site KW - acoustical methods KW - Tertiary KW - plutonic rocks KW - nuclear explosions KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549621275?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=An+overview+of+the+source+physics+experiments+%28SPE%29+at+the+Nevada+national+security+site+%28NNSS%29&rft.au=Snelson%2C+C+M%3BBarker%2C+D+L%3BWhite%2C+R+L%3BEmmitt%2C+R+F%3BTownsend%2C+M+J%3BGraves%2C+T+E%3BBecker%2C+S+A%3BTeel%2C+M+G%3BLee%2C+P%3BAntoun%2C+T+H%3BRodgers%2C+A%3BWalter%2C+W+R%3BMellors%2C+R+J%3BBrunish%2C+W+M%3BBradley%2C+C+R%3BPatton%2C+H+J%3BHawkins%2C+W+L%3BCorbell%2C+B+H%3BAbbott%2C+R+E%3BAnonymous&rft.aulast=Snelson&rft.aufirst=C&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-07-31 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - acoustical methods; Cenozoic; Climax Porphyry; experimental studies; explosions; geophysical methods; granites; igneous rocks; Nevada; Nevada Test Site; nuclear explosions; plutonic rocks; seismic methods; seismic sources; Tertiary; United States ER - TY - JOUR T1 - Seismo-acoustic observations of explosive sources AN - 1549621155; 2014-056926 AB - Since January 2011, the Sandia National Laboratories Facility for Acceptance, Calibration and Testing (FACT) has operated a seismo-acoustic station with the purpose of recording local explosions on Kirtland Air Force Base (KAFB). Our immediate goals are to develop a catalog of events and a database of seismo-acoustic waveforms from ordnance disposal and Defense Threat Reduction Agency (DTRA) events. The catalog of events will include metadata such as shot time, size, type and location. The waveform archive includes a three-channel GS-13 seismometer and a single infrasound sensor (Chaparral 25 with 50' porous hose wind reduction system). In June of 2011 a weather station was added to complement the monitoring system by providing accurate wind conditions at the times of the explosive events. Monthly internal reports compiled by KAFB provided us with the metadata for the ordnance disposal explosions, and an agreement with DTRA has enabled us to obtain metadata on their events. To date 157 explosions have been identified, including 153 ordnance disposal events and 4 DTRA tests. Along with the catalog of events we have developed automated processing routines to extract both seismic and infrasound arrivals and measure basic waveform characteristics. These include amplitudes of pre-event noise, the direct seismic arrival, air-coupled seismic arrival, infrasound arrival, and wind speed/direction. Using the waveform measurements from the pre-event noise and air-coupled seismic arrival we calculate the SNR for the seismic component of the event. We also calculate the SNR for the infrasonic component of the event using pre-event noise and the direct infrasound arrival. Using the metadata and seismic and infrasonic SNR values we are able to calculate an air-to-ground coupling ratio for each event. For local (<10 km) explosion monitoring, the wind speed and direction can influence all of the analysis parameters. It will affect the pre-event noise level as well as the infrasound peak amplitude, effectively changing the seismo-acoustic SNR ratio. JF - American Geophysical Union Fall Meeting AU - Chael, E P AU - Hart, D M AU - Jones, K R AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract S43A EP - 2224 PB - American Geophysical Union, Washington, DC VL - 2011 KW - seismograms KW - monitoring KW - explosions KW - geophysical methods KW - data processing KW - elastic waves KW - waveforms KW - seismic sources KW - seismic methods KW - noise KW - acoustical methods KW - data bases KW - signal-to-noise ratio KW - catalogs KW - winds KW - amplitude KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549621155?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Seismo-acoustic+observations+of+explosive+sources&rft.au=Chael%2C+E+P%3BHart%2C+D+M%3BJones%2C+K+R%3BAnonymous&rft.aulast=Chael&rft.aufirst=E&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-07-31 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - acoustical methods; amplitude; catalogs; data bases; data processing; elastic waves; explosions; geophysical methods; monitoring; noise; seismic methods; seismic sources; seismograms; signal-to-noise ratio; waveforms; winds ER - TY - JOUR T1 - The role of pre-stress in shear wave generation from explosions AN - 1549621118; 2014-056916 AB - Seismic waves propagating within the Earth are small perturbations in stress and strain superimposed on an existing three-dimensional (3D) stress field. This ambient stress state, commonly referred to as "tectonic stress" or "pre-stress", may be significant in or near zones of active tectonic deformation, such as the Nevada Test Site. The effect of pre-stress on seismic waveforms generated by and propagated from an underground explosion (chemical or nuclear) is poorly understood at present. However, seismologists reasonably speculate that pre-stress may contribute to the anomalously large amount of shear wave energy often observed from such sources. In order to quantitatively investigate the effects of pre-stress, we are developing an explicit, time-domain, finite-difference (FD) algorithm for simulating 3D seismic wave propagation within an isotropic elastic medium subject to an existing static stress state. The usual stress-strain constitutive relations are augmented with additional terms involving both the ambient stress tensor and its gradient. The elastic medium is represented by nine 3D fields (i.e., mass density, two Lame parameters, and six independent pre-stress tensor components). The numerical algorithm is implemented on a conventional 3D staggered grid using centered FD operators that are second-order accurate in time and fourth-order accurate in space. We are also developing mathematical dispersion relations, for both continuous and discrete space-time, characterizing seismic wave propagation within a 3D isotropic elastic medium under pre-stress. In the continuous case, the phase speed(s) of a plane wave propagating within a homogeneous and isotropic elastic body are obtained by extracting the appropriate roots of a cubic polynomial. Although the phase speed is independent of frequency (as in the usual zero-pre-stress situation), it depends on propagation direction, analogous to an anisotropic elastic medium. In the discrete case, phase speed depends on both frequency and direction. Important questions regarding the level of pre-stress required to produce noticeable effects on seismic waveforms need to be investigated. Of particular interest is quantification of the coupling between pure pressure and shear to understand how an ambient stress field generates shear waves from explosions. Although this effect is expected to be small, given the location of many test sites in tectonically active regions, it may be significant. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. JF - American Geophysical Union Fall Meeting AU - Preston, L A AU - Aldridge, D F AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract S43A EP - 2214 PB - American Geophysical Union, Washington, DC VL - 2011 KW - body waves KW - numerical models KW - explosions KW - finite difference analysis KW - stress KW - elastic waves KW - waveforms KW - stress fields KW - tectonic stress KW - time domain analysis KW - seismic waves KW - S-waves KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549621118?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+role+of+pre-stress+in+shear+wave+generation+from+explosions&rft.au=Preston%2C+L+A%3BAldridge%2C+D+F%3BAnonymous&rft.aulast=Preston&rft.aufirst=L&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-07-31 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - body waves; elastic waves; explosions; finite difference analysis; numerical models; S-waves; seismic waves; stress; stress fields; tectonic stress; time domain analysis; waveforms ER - TY - JOUR T1 - Analytical solution for two-phase flow in a wellbore using the drift-flux model AN - 1549620995; 2014-056770 AB - This paper presents analytical solutions for steady-state, compressible two-phase flow through a wellbore under isothermal conditions using the drift flux conceptual model. Although only applicable to highly idealized systems, the analytical solutions are useful for verifying numerical simulation capabilities that can handle much more complicated systems, and can be used in their own right for gaining insight about two-phase flow processes in wells. The analytical solutions are obtained by solving the mixture momentum equation of steady-state, two-phase flow with an assumption that the two phases are immiscible. These analytical solutions describe the steady-state behavior of two-phase flow in the wellbore, including profiles of phase saturation, phase velocities, and pressure gradients, as affected by the total mass flow rate, phase mass fraction, and drift velocity (i.e., the slip between two phases). Close matching between the analytical solutions and numerical solutions for a hypothetical CO (sub 2) leakage problem as well as to field data from a CO (sub 2) production well indicates that the analytical solution is capable of capturing the major features of steady-state two-phase flow through an open wellbore, and that the related assumptions and simplifications are justified for many actual systems. In addition, we demonstrate the utility of the analytical solution to evaluate how the bottomhole pressure in a well in which CO (sub 2) is leaking upward responds to the mass flow rate of CO (sub 2) -water mixture. Abstract Copyright (2011) Elsevier, B.V. JF - Advances in Water Resources AU - Pan, Lehua AU - Webb, Stephen W AU - Oldenburg, Curtis M Y1 - 2011/12// PY - 2011 DA - December 2011 SP - 1656 EP - 1665 PB - Elsevier, Oxford VL - 34 IS - 12 SN - 0309-1708, 0309-1708 KW - functions KW - two-phase models KW - carbon sequestration KW - pressure KW - numerical models KW - fluid flow KW - equations KW - production KW - seepage KW - carbon dioxide KW - boreholes KW - saturation KW - steady-state processes KW - multiphase flow KW - velocity KW - reservoir properties KW - field studies KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549620995?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=Analytical+solution+for+two-phase+flow+in+a+wellbore+using+the+drift-flux+model&rft.au=Pan%2C+Lehua%3BWebb%2C+Stephen+W%3BOldenburg%2C+Curtis+M&rft.aulast=Pan&rft.aufirst=Lehua&rft.date=2011-12-01&rft.volume=34&rft.issue=12&rft.spage=1656&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/10.1016%2Fj.advwatres.2011.08.009 L2 - http://www.sciencedirect.com/science/journal/03091708 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 21 N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2014-07-31 N1 - SubjectsTermNotLitGenreText - boreholes; carbon dioxide; carbon sequestration; equations; field studies; fluid flow; functions; multiphase flow; numerical models; pressure; production; reservoir properties; saturation; seepage; steady-state processes; two-phase models; velocity DO - http://dx.doi.org/10.1016/j.advwatres.2011.08.009 ER - TY - JOUR T1 - Comparison of laboratory and modeling results for high strain rates in support of the source physics experiment AN - 1549620925; 2014-056913 AB - The Source Physics Experiment program, conducted in Climax Stock Granite at the Nevada Test Site, will provide ground truth data to create and improve strong ground motion and seismic S-wave generation and propagation models. Modeling using advanced simulation codes will be performed both a priori and after each experiment; a key component in the predictive capability and ultimate validation of the models is the full understanding of the intervening geology between the source and instrumented bore holes including the geomechanical behavior of the site rock/structural features. Mechanical properties determined via laboratory testing of site rocks leads to the parameterization of constitutive models used in the simulations. The combined finite-discrete element method by Munjiza is an excellent tool to address a wide range of problems involving fracturing and fragmentation of solids and has been applied to many complex rock mechanics problems such as block caving, deep mining techniques, rock blasting, and seismic wave propagation. Since most of the problems involving fracture and fragmentation of solids are three dimensional, an improved 2D/3D FEM/DEM capability has been developed at Los Alamos National Laboratory. In this paper, Split Hopkinson Pressure Bar experiments, performed on the Climax Stock Granite by Sandia National Laboratories, are simulated using this improved 2D/3D FEM/DEM approach, implemented on LANL's MUNROU (Munjiza-Rougier) code and show excellent agreement. JF - American Geophysical Union Fall Meeting AU - Sussman, A AU - Rougier, E AU - Broome, S AU - Knight, E AU - Pfeifle, T AU - Schultz-Fellenz, E S AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract S43A EP - 2211 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - discrete element analysis KW - body waves KW - experimental studies KW - igneous rocks KW - Climax Porphyry KW - granites KW - geophysical methods KW - elastic waves KW - seismic sources KW - seismic methods KW - models KW - Cenozoic KW - Nevada Test Site KW - laboratory studies KW - finite element analysis KW - Tertiary KW - plutonic rocks KW - ground truth KW - seismic waves KW - S-waves KW - Nevada KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549620925?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Comparison+of+laboratory+and+modeling+results+for+high+strain+rates+in+support+of+the+source+physics+experiment&rft.au=Sussman%2C+A%3BRougier%2C+E%3BBroome%2C+S%3BKnight%2C+E%3BPfeifle%2C+T%3BSchultz-Fellenz%2C+E+S%3BAnonymous&rft.aulast=Sussman&rft.aufirst=A&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-07-31 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - body waves; Cenozoic; Climax Porphyry; discrete element analysis; elastic waves; experimental studies; finite element analysis; geophysical methods; granites; ground truth; igneous rocks; laboratory studies; models; Nevada; Nevada Test Site; plutonic rocks; S-waves; seismic methods; seismic sources; seismic waves; Tertiary; United States ER - TY - JOUR T1 - SALSA3D; improving event locations using a global 3D P-velocity model of the Earth's crust and mantle AN - 1549620014; 2014-056891 AB - To test the hypothesis that high quality 3D Earth models will produce seismic event locations that are more accurate and more precise than currently used 1D and 2/2.5D models, we are developing a global 3D P wave velocity model of the Earth's crust and mantle using seismic tomography. In this paper, we present the most recent version of our model, SALSA3D (SAndia LoS Alamos 3D) version 1.7, and demonstrate its ability to reduce mislocations for a large set of realizations derived from a carefully chosen set of globally-distributed ground truth (GT) events, compared to existing models and/or systems. Our model is derived from the latest version of the GT catalog of P and Pn travel time picks assembled by Los Alamos National Laboratory. To prevent over-weighting due to ray path redundancy and to reduce the computational burden, we cluster rays to produce representative rays. Reduction in the total number of ray paths is approximately 50%. The model is represented using the triangular tessellation system described by Ballard et al. (2009), which incorporates variable resolution in both the geographic and radial dimensions. For our starting model, we use a simplified layer crustal model derived from the NNSA Unified model in Eurasia and Crust 2.0 model elsewhere, over a uniform ak135 mantle. Sufficient damping is used to reduce velocity adjustments so that ray path changes between iterations are small. We obtain proper model smoothness by using progressive grid refinement, refining the grid only in areas where the data warrant it. In previous versions of SALSA3D, we based this refinement on velocity changes from previous model iterations. For version 1.7, we utilize the diagonal of the model resolution matrix to control where grid refinement occurs, resulting in more consistent and continuous areas of refinement than before. Our approach produces a smooth, multi-resolution model with node density appropriate to both ray coverage and the velocity gradients required by the data. We compare the travel-time prediction and location capabilities of SALSA3D to standard 1D and 2/2.5D models via location tests on a global event set with GT of 5 km or better. These events generally possess hundreds of Pn and P picks from which we generate different realizations of station distributions, yielding a range of azimuthal coverage and ratios of teleseismic to regional arrivals, with which we test the robustness and quality of relocation. The SALSA3D model reduces mislocation over the standard 1D ak135 model regardless of Pn to P ratio, with improvement most pronounced at higher azimuthal gaps. We currently are testing the use of the full model covariance matrix to produce realistic path-dependent travel time uncertainty during location tests, replacing the standard, distance-dependent, path-independent uncertainty typically used in location algorithms. JF - American Geophysical Union Fall Meeting AU - Begnaud, M L AU - Ballard, S AU - Young, C J AU - Hipp, J R AU - Chang, M AU - Encarnacao, A AU - Rowe, C A AU - Phillips, W S AU - Steck, L AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract S41E EP - 04 PB - American Geophysical Union, Washington, DC VL - 2011 KW - tomography KW - P-waves KW - body waves KW - three-dimensional models KW - geophysical methods KW - mantle KW - elastic waves KW - seismic methods KW - models KW - velocity KW - seismic waves KW - crust KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549620014?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=SALSA3D%3B+improving+event+locations+using+a+global+3D+P-velocity+model+of+the+Earth%27s+crust+and+mantle&rft.au=Begnaud%2C+M+L%3BBallard%2C+S%3BYoung%2C+C+J%3BHipp%2C+J+R%3BChang%2C+M%3BEncarnacao%2C+A%3BRowe%2C+C+A%3BPhillips%2C+W+S%3BSteck%2C+L%3BAnonymous&rft.aulast=Begnaud&rft.aufirst=M&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-07-31 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - body waves; crust; elastic waves; geophysical methods; mantle; models; P-waves; seismic methods; seismic waves; three-dimensional models; tomography; velocity ER - TY - JOUR T1 - Data-intensive discovery methods for seismic monitoring AN - 1545408997; 2014-054171 AB - For most regions of our planet, earthquakes and explosions are still located one-at-a-time using seismic phase picks--a procedure that has not fundamentally changed for more than a century. But methods that recognize and use seismogram archives as a major resource, enabling comparisons of waveforms recorded from neighboring events and relocating numerous events relative to each other, have been successfully demonstrated, especially for California, where they have enabled new insights into earthquake physics and Earth structure, and have raised seismic monitoring to new levels. We are beginning a series of projects to evaluate such data-intensive methods on ever-larger scales, using cross correlation (CC) to analyze seismicity in three different ways: (1) to find repeating earthquakes (whose waveforms are very similar, so the CC value measured over long windows must be high); (2) to measure time differences and amplitude differences to enable precise relocations and relative amplitude studies, of seismic events with respect to their neighboring events (then CC can be much lower, yet still give a better estimate of arrival time differences and relative amplitudes, compared to differencing phase picks and magnitudes); and, perhaps most importantly, (3) as a detector, to find new events in current data streams that are similar to events already in the archive, or to add to the number of detections of an already known event. Experience documented by Schaff and Waldhauser (2005) for California and Schaff (2009) for China indicates that the great majority of events in seismically active regions generate waveforms that are sufficiently similar to the waveforms of neighboring events to allow CC methods to be used to obtain relative locations. Schaff (2008, 2010) has demonstrated the capability of CC methods to achieve detections, with minimal false alarms, down to more than a magnitude unit below conventional STA/LTA detectors though CC methods are far more computationally-intensive. Elsewhere at this meeting Cleveland, Ammon, and Van DeMark report in more detail on greatly-improved event locations along oceanic fracture zones using CC methods applied to 40-80s Rayleigh waves; and Slinkard, Carr, Heck and Young at Sandia have reported greatly-improved computational approaches that reduce CPU demands from hours using a fast workstation to minutes using a GPU, when a continuous data stream lasting several days is searched (using CC methods) for seismic signals similar to those of hundreds of previously documented events. From diverse results such as these, it seems appropriate to consider the future possibility of radical improvement in monitoring virtually all seismically active areas, using archives of prior events as the major resource--though we recognize that such an approach does not directly help to characterize seismic events in inactive regions, or events in active regions which are dissimilar to previously recorded events. JF - American Geophysical Union Fall Meeting AU - Richards, P G AU - Schaff, D P AU - Young, C J AU - Slinkard, M AU - Heck, S AU - Ammon, C J AU - Cleveland, M AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract S32A EP - 06 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - seismograms KW - monitoring KW - geophysical methods KW - data processing KW - elastic waves KW - correlation KW - seismic methods KW - California KW - computers KW - seismicity KW - arrival time KW - earthquakes KW - 19:Seismology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545408997?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Data-intensive+discovery+methods+for+seismic+monitoring&rft.au=Richards%2C+P+G%3BSchaff%2C+D+P%3BYoung%2C+C+J%3BSlinkard%2C+M%3BHeck%2C+S%3BAmmon%2C+C+J%3BCleveland%2C+M%3BAnonymous&rft.aulast=Richards&rft.aufirst=P&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-07-17 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - arrival time; California; computers; correlation; data processing; earthquakes; elastic waves; geophysical methods; monitoring; seismic methods; seismicity; seismograms; United States ER - TY - JOUR T1 - High-resolution, parallel, continental ice sheet modelling using nonlinearly consistent solution algorithms AN - 1020540115; 2012-056430 AB - A parallel capability and Jacobian-Free Newton-Krylov solution method has been implemented into the higher-order velocity dynamical core within the Community Ice Sheet Model (CISM), a three dimensional, thermomechanical, continental scale ice sheet model coupled to the Community Earth System Model (CESM). Using these new capabilities, we present an analysis of the accuracy, convergence behavior, and efficiency gains for several standard test cases as well as for high-resolution Greenland simulations. Progress toward high-resolution simulations using the parallel CISM within the CESM will be discussed, including an outline of existing and future algorithmic and logistical challenges. JF - American Geophysical Union Fall Meeting AU - Evans, K J AU - Price, S F AU - Salinger, A G AU - Worley, P H AU - Nichols, J A AU - Norman, M AU - Lipscomb, W H AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract DI14A EP - 06 PB - American Geophysical Union, Washington, DC VL - 2011 KW - models KW - Greenland KW - three-dimensional models KW - ice KW - Arctic region KW - Greenland ice sheet KW - ice cover KW - thermomechanical properties KW - glacial geology KW - algorithms KW - ice sheets KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1020540115?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=High-resolution%2C+parallel%2C+continental+ice+sheet+modelling+using+nonlinearly+consistent+solution+algorithms&rft.au=Evans%2C+K+J%3BPrice%2C+S+F%3BSalinger%2C+A+G%3BWorley%2C+P+H%3BNichols%2C+J+A%3BNorman%2C+M%3BLipscomb%2C+W+H%3BAnonymous&rft.aulast=Evans&rft.aufirst=K&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2012-01-01 N1 - PubXState - DC N1 - Last updated - 2014-09-18 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - algorithms; Arctic region; glacial geology; Greenland; Greenland ice sheet; ice; ice cover; ice sheets; models; thermomechanical properties; three-dimensional models ER - TY - JOUR T1 - A continuum damage mechanics approach to simulation of creep and fracture in ice sheets AN - 1020537767; 2012-056316 AB - We investigate iceberg calving from grounded tidewater and outlet glaciers using a novel creep continuum damage model for polycrystalline ice, which is valid for low stresses or strain rates. The proposed three-dimensional model is based on a thermo-viscoelastic constitutive law for ice creep and a local damage accumulation law for tension, compression and shear loadings. The model has been validated by published experimental data and is implemented in the commercially available finite element code ABAQUS by adopting a strain-based algorithm in a Lagrangian description. The model is then used to investigate conditions that enable surface, englacial and basal crevasse formation resulting from different boundary conditions applied to an idealized rectangular slab of ice in contact with the ocean. Preliminary simulations, based on imposed stress fields, suggest that a low tensile stress is required for crevasse (crack) opening and propagation to the bottom of the ice slab. In all the subsequent simulations the internal stress field is explicitly calculated. Basal boundary condition of the ice slab is varied from free slip to Newtonian frictional slip to study its effect on crack growth. The simulation results suggest that in the case of deeper (thicker) ice sheets compression failure of ice at the bottom is a possible mode of failure and that the height of the sea water level influences the depth of the crevasses. JF - American Geophysical Union Fall Meeting AU - Duddu, R AU - Bassis, J N AU - Waisman, H AU - Tuminaro, R AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract C11A EP - 0664 PB - American Geophysical Union, Washington, DC VL - 2011 KW - tidewater glaciers KW - icebergs KW - three-dimensional models KW - strain KW - glaciers KW - ice mechanics KW - ice sheets KW - models KW - fractures KW - ice KW - creep KW - calving KW - polycrystalline materials KW - glacial geology KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1020537767?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+continuum+damage+mechanics+approach+to+simulation+of+creep+and+fracture+in+ice+sheets&rft.au=Duddu%2C+R%3BBassis%2C+J+N%3BWaisman%2C+H%3BTuminaro%2C+R%3BAnonymous&rft.aulast=Duddu&rft.aufirst=R&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2012-01-01 N1 - PubXState - DC N1 - Last updated - 2014-09-18 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - calving; creep; fractures; glacial geology; glaciers; ice; ice mechanics; ice sheets; icebergs; models; polycrystalline materials; strain; three-dimensional models; tidewater glaciers ER - TY - CPAPER T1 - Materials Degradation in Silicon Microsystems at High Temperatures T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313102358; 6112743 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Phinney, Leslie AU - Buchheit, Thomas AU - Boyce, Brad Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Degradation KW - Silicon KW - high temperature KW - Temperature effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313102358?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Materials+Degradation+in+Silicon+Microsystems+at+High+Temperatures&rft.au=Phinney%2C+Leslie%3BBuchheit%2C+Thomas%3BBoyce%2C+Brad&rft.aulast=Phinney&rft.aufirst=Leslie&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - In-situ Observations and Measurements of Thread Failure in Thin Walled Aluminum Alloy Joints T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313082978; 6113676 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Antoun, Bonnie AU - Wellman, Gerald AU - Dempsey, J AU - Grange, Spencer AU - Connelly, Kevin AU - Jin, Helena AU - Korellis, John Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Aluminum KW - Alloys KW - Joints KW - alloys KW - Failures UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313082978?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=In-situ+Observations+and+Measurements+of+Thread+Failure+in+Thin+Walled+Aluminum+Alloy+Joints&rft.au=Antoun%2C+Bonnie%3BWellman%2C+Gerald%3BDempsey%2C+J%3BGrange%2C+Spencer%3BConnelly%2C+Kevin%3BJin%2C+Helena%3BKorellis%2C+John&rft.aulast=Antoun&rft.aufirst=Bonnie&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Uncertainty Enabled Design of an Acceleration Switch T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313082109; 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6113415 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Dowding, Kevin Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Fluid dynamics KW - heat transfer KW - Heat transfer KW - Computer applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313081908?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=ASME+V%26amp%3BV+20+Verification+and+Validation+in+Computational+Fluid+Dynamics+and+Heat+Transfer%2C+upcoming+supplements&rft.au=Dowding%2C+Kevin&rft.aulast=Dowding&rft.aufirst=Kevin&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Imperfection Analysis of a Bistable Shell T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313073215; 6113895 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Ford, Kurtis AU - Brake, Mathew AU - VanGoethem, Douglas AU - Cobert, Austin Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Shells UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313073215?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Imperfection+Analysis+of+a+Bistable+Shell&rft.au=Ford%2C+Kurtis%3BBrake%2C+Mathew%3BVanGoethem%2C+Douglas%3BCobert%2C+Austin&rft.aulast=Ford&rft.aufirst=Kurtis&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Experimental Investigation of Selective Withdrawal and Light Layer Entrainment of Stratified Immiscible Liquids T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313072295; 6113422 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Hartenberger, Joel AU - O'Hern, Tim Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Entrainment KW - Light effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313072295?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Experimental+Investigation+of+Selective+Withdrawal+and+Light+Layer+Entrainment+of+Stratified+Immiscible+Liquids&rft.au=Hartenberger%2C+Joel%3BO%27Hern%2C+Tim&rft.aulast=Hartenberger&rft.aufirst=Joel&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Materials and Microsystems - What's New Under the Sun?" T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313057202; 6112566 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Tatro, Margie Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - sun KW - Sun UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313057202?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Materials+and+Microsystems+-+What%27s+New+Under+the+Sun%3F%22&rft.au=Tatro%2C+Margie&rft.aulast=Tatro&rft.aufirst=Margie&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Physically-Based Single Crystal and Polycrystal Models for Low-Temperature Plasticity in BCC Metals T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313055093; 6113571 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Weinberger, Christopher Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Metals KW - Plasticity KW - Crystals KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313055093?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Physically-Based+Single+Crystal+and+Polycrystal+Models+for+Low-Temperature+Plasticity+in+BCC+Metals&rft.au=Weinberger%2C+Christopher&rft.aulast=Weinberger&rft.aufirst=Christopher&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Controlling Surface Patterns in Light-Activated Polymer Films Via Photo-Induced Eigenstrains T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313050110; 6113709 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Long, Kevin AU - Scott, Timothy AU - Dunn, Martin AU - Qi, Jerry Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Polymers KW - Films UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313050110?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Controlling+Surface+Patterns+in+Light-Activated+Polymer+Films+Via+Photo-Induced+Eigenstrains&rft.au=Long%2C+Kevin%3BScott%2C+Timothy%3BDunn%2C+Martin%3BQi%2C+Jerry&rft.aulast=Long&rft.aufirst=Kevin&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Silicon Carbide Phononic Crystals for RF and Microwave Communication Systems T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313031165; 6112689 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Ziaei-Moayyed, Maryam AU - Reinke, Charles AU - Su, Mehmet AU - El-Kady, Ihab AU - Olsson, Roy Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Silicon carbide KW - Communication KW - Crystals KW - Communication systems KW - Microwave radiation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313031165?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Silicon+Carbide+Phononic+Crystals+for+RF+and+Microwave+Communication+Systems&rft.au=Ziaei-Moayyed%2C+Maryam%3BReinke%2C+Charles%3BSu%2C+Mehmet%3BEl-Kady%2C+Ihab%3BOlsson%2C+Roy&rft.aulast=Ziaei-Moayyed&rft.aufirst=Maryam&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Micro Fabricated Phononic Crystal Devices for Radio Frequency Communications T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313031128; 6112688 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Olsson, Roy AU - Ziaei-Moayyed, Maryam AU - Kim, Bongsang AU - Reinke, Charles AU - Su, Mehmet AU - Goettler, Drew AU - Leseman, Zayd AU - El-kady, Ihab Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Communication KW - Crystals KW - Radio UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313031128?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Micro+Fabricated+Phononic+Crystal+Devices+for+Radio+Frequency+Communications&rft.au=Olsson%2C+Roy%3BZiaei-Moayyed%2C+Maryam%3BKim%2C+Bongsang%3BReinke%2C+Charles%3BSu%2C+Mehmet%3BGoettler%2C+Drew%3BLeseman%2C+Zayd%3BEl-kady%2C+Ihab&rft.aulast=Olsson&rft.aufirst=Roy&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - High-rate Characterization of 304L Stainless Steel at Elevated Temperatures T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313028924; 6113600 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Song, Bo AU - Antoun, Bonnie AU - Brown, Arthur Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Temperature effects KW - Steel KW - stainless steel KW - Stainless steel UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313028924?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=High-rate+Characterization+of+304L+Stainless+Steel+at+Elevated+Temperatures&rft.au=Song%2C+Bo%3BAntoun%2C+Bonnie%3BBrown%2C+Arthur&rft.aulast=Song&rft.aufirst=Bo&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Experimental Validation of an Elastic-Plastic Impact Model T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313028062; 6113873 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Brake, Mathew AU - Reu, Phillip AU - VanGoethem, Douglas AU - Bejarano, Michael AU - Sumali, Anton Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313028062?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Experimental+Validation+of+an+Elastic-Plastic+Impact+Model&rft.au=Brake%2C+Mathew%3BReu%2C+Phillip%3BVanGoethem%2C+Douglas%3BBejarano%2C+Michael%3BSumali%2C+Anton&rft.aulast=Brake&rft.aufirst=Mathew&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - An Analytical Elastic-Plastic Contact Model T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313028042; 6113872 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Brake, Mathew Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313028042?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=An+Analytical+Elastic-Plastic+Contact+Model&rft.au=Brake%2C+Mathew&rft.aulast=Brake&rft.aufirst=Mathew&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Unified Creep Plasticity Damage (UCPD) Model for Solder T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313026495; 6113574 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Neilsen, Mike AU - Vianco, Paul Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - creep KW - Plasticity KW - Models KW - Creep UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313026495?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Unified+Creep+Plasticity+Damage+%28UCPD%29+Model+for+Solder&rft.au=Neilsen%2C+Mike%3BVianco%2C+Paul&rft.aulast=Neilsen&rft.aufirst=Mike&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Characterization of SOI MEMS Sidewall Roughness T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1313025595; 6112593 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Phinney, Leslie AU - McKenzie, Bonnie AU - Ohlhausen, James AU - Buchheit, Thomas AU - Shul, Randy Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Microelectromechanical systems UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313025595?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Characterization+of+SOI+MEMS+Sidewall+Roughness&rft.au=Phinney%2C+Leslie%3BMcKenzie%2C+Bonnie%3BOhlhausen%2C+James%3BBuchheit%2C+Thomas%3BShul%2C+Randy&rft.aulast=Phinney&rft.aufirst=Leslie&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Tribology of Pure Metals and Alloys T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312996405; 6113752 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Chandross, Michael AU - Cheng, Shengfeng Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Metals KW - Alloys KW - alloys UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312996405?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Tribology+of+Pure+Metals+and+Alloys&rft.au=Chandross%2C+Michael%3BCheng%2C+Shengfeng&rft.aulast=Chandross&rft.aufirst=Michael&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Double-blind Benchmarking of Ductile Tearing Simulations: II. Crack Propagation. T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312996308; 6113749 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Boyce, Brad Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Simulation KW - Crack propagation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312996308?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Double-blind+Benchmarking+of+Ductile+Tearing+Simulations%3A+II.+Crack+Propagation.&rft.au=Boyce%2C+Brad&rft.aulast=Boyce&rft.aufirst=Brad&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Modeling Constrained Layer Frictional Interfaces with Discontinuous Basis Functions T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312995715; 6113881 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Brake, Mathew AU - Starr, Michael AU - Segalman, Daniel Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Mechanical engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312995715?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Modeling+Constrained+Layer+Frictional+Interfaces+with+Discontinuous+Basis+Functions&rft.au=Brake%2C+Mathew%3BStarr%2C+Michael%3BSegalman%2C+Daniel&rft.aulast=Brake&rft.aufirst=Mathew&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Reduction in thermal boundary conductance due to proton implantation in silicon and sapphire T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312987258; 6113179 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Hopkins, Patrick AU - Hattar, Khalid AU - Duda, John AU - Beechem, Thomas AU - Ihlefeld, Jon AU - Medlin, Douglas AU - Piekos, Edward Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Silicon KW - Conductance KW - Protons KW - Boundaries UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312987258?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Reduction+in+thermal+boundary+conductance+due+to+proton+implantation+in+silicon+and+sapphire&rft.au=Hopkins%2C+Patrick%3BHattar%2C+Khalid%3BDuda%2C+John%3BBeechem%2C+Thomas%3BIhlefeld%2C+Jon%3BMedlin%2C+Douglas%3BPiekos%2C+Edward&rft.aulast=Hopkins&rft.aufirst=Patrick&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Predicting Structure/Property Relationships for Interfacial Thermal Transport of SiGe/Si Boundaries T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312987166; 6113178 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Beechem, Thomas AU - Hopkins, Patrick AU - Duda, John AU - Hattar, Khalid AU - Ihlefeld, Jon AU - Medlin, Douglas AU - Piekos, Edward Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Boundaries KW - Immunoglobulin E UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312987166?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Predicting+Structure%2FProperty+Relationships+for+Interfacial+Thermal+Transport+of+SiGe%2FSi+Boundaries&rft.au=Beechem%2C+Thomas%3BHopkins%2C+Patrick%3BDuda%2C+John%3BHattar%2C+Khalid%3BIhlefeld%2C+Jon%3BMedlin%2C+Douglas%3BPiekos%2C+Edward&rft.aulast=Beechem&rft.aufirst=Thomas&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Alteration of Thermal Boundary Conductance in SiGe/Si Boundaries Using Ion Beam Irradiation T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312987113; 6113177 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Beechem, Thomas AU - Hattar, Khalid AU - Hopkins, Patrick AU - Duda, John AU - Ihlefeld, Jon AU - Medlin, Douglas AU - Piekos, Edward Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Irradiation KW - Boundaries KW - Radiation KW - Conductance KW - Immunoglobulin E UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312987113?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Alteration+of+Thermal+Boundary+Conductance+in+SiGe%2FSi+Boundaries+Using+Ion+Beam+Irradiation&rft.au=Beechem%2C+Thomas%3BHattar%2C+Khalid%3BHopkins%2C+Patrick%3BDuda%2C+John%3BIhlefeld%2C+Jon%3BMedlin%2C+Douglas%3BPiekos%2C+Edward&rft.aulast=Beechem&rft.aufirst=Thomas&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Manipulating Thermal Phonons: A Phononic Crystal Rout to Hi-ZT Thermoelectrics T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312984874; 6112684 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - El-kady, Ihab AU - Su, Mehmet AU - Reinke, Charles AU - Hopkins, Patrick AU - Goettler, Drew AU - Leseman, Zayd AU - Shaner, Eric AU - Olsson, Roy Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Crystals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312984874?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Manipulating+Thermal+Phonons%3A+A+Phononic+Crystal+Rout+to+Hi-ZT+Thermoelectrics&rft.au=El-kady%2C+Ihab%3BSu%2C+Mehmet%3BReinke%2C+Charles%3BHopkins%2C+Patrick%3BGoettler%2C+Drew%3BLeseman%2C+Zayd%3BShaner%2C+Eric%3BOlsson%2C+Roy&rft.aulast=El-kady&rft.aufirst=Ihab&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Exploring bulk and surface methods for regularizing damage evolution in ductile metals T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312984727; 6113566 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Foulk III, J Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Metals KW - Evolution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312984727?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Exploring+bulk+and+surface+methods+for+regularizing+damage+evolution+in+ductile+metals&rft.au=Foulk+III%2C+J&rft.aulast=Foulk+III&rft.aufirst=J&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Strongly Coupled Thermo-Elastoplasticity T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312984640; 6113563 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Ostien, Jake Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Mechanical engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312984640?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Strongly+Coupled+Thermo-Elastoplasticity&rft.au=Ostien%2C+Jake&rft.aulast=Ostien&rft.aufirst=Jake&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Nanoengineering for Energy and Sustainability T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312981632; 6112590 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Shinn, Neal Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Sustainability KW - Energy KW - Resource management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312981632?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Nanoengineering+for+Energy+and+Sustainability&rft.au=Shinn%2C+Neal&rft.aulast=Shinn&rft.aufirst=Neal&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Computationally Efficient Plane-Wave Expansion Band Structure Calculations for Phononic Crystal Devices T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312978613; 6113990 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Reinke, Charles AU - Su, Mehmet AU - Olsson, Roy AU - Leseman, Zayd AU - Hussein, Mahmoud AU - El-kady, Ihab Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Crystals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312978613?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Computationally+Efficient+Plane-Wave+Expansion+Band+Structure+Calculations+for+Phononic+Crystal+Devices&rft.au=Reinke%2C+Charles%3BSu%2C+Mehmet%3BOlsson%2C+Roy%3BLeseman%2C+Zayd%3BHussein%2C+Mahmoud%3BEl-kady%2C+Ihab&rft.aulast=Reinke&rft.aufirst=Charles&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Thermal Conductivity Measurements of Silicon Thin Films with Periodically Arrayed Nanoscale Perforations T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312977295; 6113190 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Harris, Charles AU - Kim, Bongsang AU - Reinke, Charles AU - Hopkins, Patrick AU - Olsson, Roy AU - El-kady, Ihab AU - Shaner, Eric AU - Sullivan, John Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Silicon KW - thermal conductivity KW - Films KW - Thermal conductivity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312977295?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Thermal+Conductivity+Measurements+of+Silicon+Thin+Films+with+Periodically+Arrayed+Nanoscale+Perforations&rft.au=Harris%2C+Charles%3BKim%2C+Bongsang%3BReinke%2C+Charles%3BHopkins%2C+Patrick%3BOlsson%2C+Roy%3BEl-kady%2C+Ihab%3BShaner%2C+Eric%3BSullivan%2C+John&rft.aulast=Harris&rft.aufirst=Charles&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Lithiation induced stress and failure of anode materials in lithium ion batteries T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312956231; 6112546 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Huang, Jianyu Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Lithium KW - Stress KW - Batteries KW - Anodes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312956231?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Lithiation+induced+stress+and+failure+of+anode+materials+in+lithium+ion+batteries&rft.au=Huang%2C+Jianyu&rft.aulast=Huang&rft.aufirst=Jianyu&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Measurements in Solid Propellant Plumes at Ambient Conditions T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312956142; 6112544 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Height, Jonathan AU - Donaldson, Burl AU - Gill, Walter AU - Parigger, Christian Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Plumes KW - Propellants UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312956142?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=Measurements+in+Solid+Propellant+Plumes+at+Ambient+Conditions&rft.au=Height%2C+Jonathan%3BDonaldson%2C+Burl%3BGill%2C+Walter%3BParigger%2C+Christian&rft.aulast=Height&rft.aufirst=Jonathan&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - A Finite Element Method for Ablation Problems T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312950833; 6113431 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Gartling, David Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Finite element method KW - Ablation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312950833?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=A+Finite+Element+Method+for+Ablation+Problems&rft.au=Gartling%2C+David&rft.aulast=Gartling&rft.aufirst=David&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - The Enhancement of Grain Growth in FCC Metals Under Deformation at Low Temperatures T2 - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AN - 1312949476; 6113744 JF - 2011 ASME International Mechanical Engineering Congress & Exposition (ASME 2011) AU - Battaile, Corbett AU - Boyce, Brad AU - Foiles, Stephen AU - Holm, Elizabeth AU - Homer, Eric AU - Padilla, Henry Y1 - 2011/11/11/ PY - 2011 DA - 2011 Nov 11 KW - Low temperature KW - Metals KW - Grains KW - Deformation KW - Grain KW - Growth UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312949476?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.atitle=The+Enhancement+of+Grain+Growth+in+FCC+Metals+Under+Deformation+at+Low+Temperatures&rft.au=Battaile%2C+Corbett%3BBoyce%2C+Brad%3BFoiles%2C+Stephen%3BHolm%2C+Elizabeth%3BHomer%2C+Eric%3BPadilla%2C+Henry&rft.aulast=Battaile&rft.aufirst=Corbett&rft.date=2011-11-11&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+ASME+International+Mechanical+Engineering+Congress+%26+Exposition+%28ASME+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2011/TechnicalProgramOverview.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Shear Stress Measurements and Erosion Implications for Wave and Combined Wave-Current Generated Flows AN - 1827896701; PQ0003647985 AB - Sediment transport in wave-dominated environments is of great interest for dredged material placement, contaminated sediments, habitat protection, and other issues. The shear stress at the sediment-water interface during a wave event is an important parameter in determining erosion and transport for both experimental and model simulation applications. Sandia National Laboratories has developed a laboratory and field device called the sediment erosion actuated by wave oscillations and linear flow (SEAWOLF) flume in which high-resolution, particle-image velocimetry (PIV) has been applied to investigate turbulent flow shear stresses for a variety of flow conditions. The results of the PIV analysis for a wave cycle demonstrate a fully developed turbulent flow, relaminarization, and an explosive transition back to turbulence. In many cases, the results of the flume tests did not show good agreement with previously reported computational fluid dynamic results and existing theories, such as Blasius, for wave-current interactions, which raises the question of whether similar phenomena are present in real environments. These results implore more studies to be conducted with similarly high-resolution field measurements and modeling efforts to determine shear stress time history for oscillatory flows and the subsequent effects on erosion and sediment transport in wave-dominated environments. JF - Journal of Waterway, Port, Coastal and Ocean Engineering AU - Jepsen, Richard A AU - Roberts, Jesse D AU - Kearney, Sean P AU - Dimiduk, Thomas G AU - O'Hern, Timothy J AU - Gailani, Joseph Z AD - Sandia National Laboratories, Albuquerque, NM 87185., rajepse@sandia.gov Y1 - 2011/11/03/ PY - 2011 DA - 2011 Nov 03 SP - 323 EP - 329 PB - American Society of Civil Engineers, 345 E. 47th St. New York NY 10017-2398 United States VL - 138 IS - 4 SN - 0733-950X, 0733-950X KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts KW - Technical Notes KW - Technical Note KW - Waves KW - Sediment KW - Erosion KW - Oscillations KW - Shear stress KW - Measurement KW - PIV KW - Oscillation KW - Laminar KW - Turbulent KW - Flow KW - Turbulent Flow KW - turbulence KW - Environmental factors KW - Flumes KW - Shear Stress KW - Sediment transport KW - Sediment Transport KW - Marine KW - Turbulent flow KW - Sediment-water interface KW - Numerical simulations KW - Coastal oceanography KW - Fluid dynamics KW - Waterways KW - Wave generation KW - Wave-current interaction KW - AQ 00001:Water Resources and Supplies KW - Q2 09102:Institutes and organizations KW - SW 0810:General KW - M2 551.511:Mechanics and Thermodynamics of the Atmosphere (551.511) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1827896701?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Waterway%2C+Port%2C+Coastal+and+Ocean+Engineering&rft.atitle=Shear+Stress+Measurements+and+Erosion+Implications+for+Wave+and+Combined+Wave-Current+Generated+Flows&rft.au=Jepsen%2C+Richard+A%3BRoberts%2C+Jesse+D%3BKearney%2C+Sean+P%3BDimiduk%2C+Thomas+G%3BO%27Hern%2C+Timothy+J%3BGailani%2C+Joseph+Z&rft.aulast=Jepsen&rft.aufirst=Richard&rft.date=2011-11-03&rft.volume=138&rft.issue=4&rft.spage=323&rft.isbn=&rft.btitle=&rft.title=Journal+of+Waterway%2C+Port%2C+Coastal+and+Ocean+Engineering&rft.issn=0733950X&rft_id=info:doi/10.1061%2F%28ASCE%29WW.1943-5460.0000137 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-10-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Shear stress; Sediment-water interface; Turbulent flow; Flumes; Fluid dynamics; Sediment transport; Wave generation; Environmental factors; Wave-current interaction; Erosion; Numerical simulations; Coastal oceanography; Sediment Transport; Flow; Turbulent Flow; Shear Stress; Waves; Waterways; turbulence; Marine DO - http://dx.doi.org/10.1061/(ASCE)WW.1943-5460.0000137 ER - TY - JOUR T1 - Understanding ignition processes in spray-guided gasoline engines using high-speed imaging and the extended spark-ignition model SparkCIMM. Part A: Spark channel processes and the turbulent flame front propagation AN - 926322560; 15792825 AB - Recent high-speed imaging of ignition processes in spray-guided gasoline engines has motivated the development of the physically-based spark channel ignition monitoring model SparkCIMM, which bridges the gap between a detailed spray/vaporization model and a model for fully developed turbulent flame front propagation. Previously, both SparkCIMM and high-speed optical imaging data have shown that, in spray-guided engines, the spark plasma channel is stretched and wrinkled by the local turbulence, excessive stretching results in spark re-strikes, large variations occur in turbulence intensity and local equivalence ratio along the spark channel, and ignition occurs in localized regions along the spark channel (based upon a Karlovitz-number criteria). In this paper, SparkCIMM is enhanced by: (1) an extended flamelet model to predict localized ignition spots along the spark plasma channel, (2) a detailed chemical mechanism for gasoline surrogate oxidation, and (3) a formulation of early flame kernel propagation based on the G-equation theory that includes detailed chemistry and a local enthalpy flamelet model to consider turbulent enthalpy fluctuations. In agreement with new experimental data from broadband spark and hot soot luminosity imaging, the model establishes that ignition prefers to occur in fuel-rich regions along the spark channel. In this highly-turbulent highly-stratified environment, these ignition spots burn as quasi-laminar flame kernels. In this paper, the laminar burning velocities and flame thicknesses of these kernels are calculated along the mean turbulent flame front, using tabulated detailed chemistry flamelets over a wide range of stoichiometry and exhaust gas dilution. The criteria for flame propagation include chemical (cross-over temperature based) and turbulence (Karlovitz-number based) effects. Numerical simulations using ignition models of different physical complexity demonstrate the significance of turbulent mixture fraction and enthalpy fluctuations in the prediction of early flame front propagation. A third paper on SparkCIMM (companion paper to this one) focuses on the importance of molecular fuel properties and flame curvature on early flame propagation and compares computed flame propagation with high speed combustion imaging and computed heat release rates with cylinder pressure analysis. The goals of SparkCIMM development are to (a) enhance our fundamental understanding of ignition and combustion processes in highly-turbulent highly-stratified engine conditions, (b) incorporate that understanding into a physically-based submodel for RANS engine calculations that can be reliably used without modification for a wide range of conditions (i.e., homogeneous or stratified, low or high turbulence, low or high dilution), and (c) provide a submodel that can be incorporated into a future LES model for physically-based modeling of cycle-to-cycle variability in engines. JF - Combustion and Flame AU - Dahms, Rainer N AU - Drake, Michael C AU - Fansler, Todd D AU - Kuo, T-W AU - Peters, N AD - Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551, USA Rndahms@sandia.gov Y1 - 2011/11// PY - 2011 DA - Nov 2011 SP - 2229 EP - 2244 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 158 IS - 11 SN - 0010-2180, 0010-2180 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Aerospace & High Technology Database (AH) KW - Channels KW - Computational fluid dynamics KW - Engines KW - High speed KW - Ignition KW - Imaging KW - Mathematical models KW - Turbulence UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/926322560?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Combustion+and+Flame&rft.atitle=Understanding+ignition+processes+in+spray-guided+gasoline+engines+using+high-speed+imaging+and+the+extended+spark-ignition+model+SparkCIMM.+Part+A%3A+Spark+channel+processes+and+the+turbulent+flame+front+propagation&rft.au=Dahms%2C+Rainer+N%3BDrake%2C+Michael+C%3BFansler%2C+Todd+D%3BKuo%2C+T-W%3BPeters%2C+N&rft.aulast=Dahms&rft.aufirst=Rainer&rft.date=2011-11-01&rft.volume=158&rft.issue=11&rft.spage=2229&rft.isbn=&rft.btitle=&rft.title=Combustion+and+Flame&rft.issn=00102180&rft_id=info:doi/10.1016%2Fj.combustflame.2011.03.012 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-03-01 N1 - Last updated - 2012-12-05 DO - http://dx.doi.org/10.1016/j.combustflame.2011.03.012 ER - TY - JOUR T1 - Group IVA irons; new constraints on the crystallization and cooling history of an asteroidal core with a complex history AN - 921717124; 2012-024227 AB - We report analyses of 14 group IVA iron meteorites, and the ungrouped but possibly related, Elephant Moraine (EET) 83230, for siderophile elements by laser ablation ICP-MS and isotope dilution. EET was also analyzed for oxygen isotopic composition and metallographic structure, and Fuzzy Creek, currently the IVA with the highest Ni concentration, was analyzed for metallographic structure. Highly siderophile elements (HSE) Re, Os and Ir concentrations vary by nearly three orders of magnitude over the entire range of IVA irons, while Ru, Pt and Pd vary by less than factors of five. Chondrite normalized abundances of HSE form nested patterns consistent with progressive crystal-liquid fractionation. Attempts to collectively model the HSE abundances resulting from fractional crystallization achieved best results for 3 wt.% S, compared to 0.5 or 9 wt.% S. Consistent with prior studies, concentrations of HSE and other refractory siderophile elements estimated for the bulk IVA core and its parent body are in generally chondritic proportions. Projected abundances of Pd and Au, relative to more refractory HSE, are slightly elevated and modestly differ from L/LL chondrites, which some have linked with group IVA, based on oxygen isotope similarities. Abundance trends for the moderately volatile and siderophile element Ga cannot be adequately modeled for any S concentration, the cause of which remains enigmatic. Further, concentrations of some moderately volatile and siderophile elements indicate marked, progressive depletions in the IVA system. However, if the IVA core began crystallization with approximately 3 wt.% S, depletions of more volatile elements cannot be explained as a result of prior volatilization/condensation processes. The initial IVA core had an approximately chondritic Ni/Co ratio, but a fractionated Fe/Ni ratio of approximately 10, indicates an Fe-depleted core. This composition is most easily accounted for by assuming that the surrounding silicate shell was enriched in iron, consistent with an oxidized parent body. The depletions in Ga may reflect decreased siderophilic behavior in a relatively oxidized body, and more favorable partitioning into the silicate portion of the parent body. Phosphate inclusions in EET show Delta (super 17) O values within the range measured for silicates in IVA iron meteorites. EET has a typical ataxitic microstructure with precipitates of kamacite within a matrix of plessite. Chemical and isotopic evidence for a genetic relation between EET and group IVA is strong, but the high Ni content and the newly determined, rapid cooling rate of this meteorite show that it should continue to be classified as ungrouped. Previously reported metallographic cooling rates for IVA iron meteorites have been interpreted to indicate an inwardly crystallizing, approximately 150 km radius metallic body with little or no silicate mantle. Hence, the IVA group was likely formed as a mass of molten metal separated from a much larger parent body that was broken apart by a large impact. Given the apparent genetic relation with IVA, EET was most likely generated via crystal-liquid fractionation in another, smaller body spawned from the same initial liquid during the impact event that generated the IVA body. JF - Geochimica et Cosmochimica Acta AU - McCoy, T J AU - Walker, R J AU - Goldstein, J I AU - Yang, J AU - McDonough, W F AU - Rumble, D AU - Chabot, N L AU - Ash, R D AU - Corrigan, C M AU - Michael, J R AU - Kotula, P G Y1 - 2011/11// PY - 2011 DA - November 2011 SP - 6821 EP - 6843 PB - Elsevier, New York, NY VL - 75 IS - 22 SN - 0016-7037, 0016-7037 KW - ordinary chondrites KW - Fuzzy Creek Meteorite KW - stony meteorites KW - oxygen KW - asteroids KW - isotopes KW - rhenium KW - mass spectra KW - phase transitions KW - Elephant Moraine Meteorites KW - platinum group KW - L chondrites KW - stable isotopes KW - meteorites KW - radioactive isotopes KW - water-rock interaction KW - inclusions KW - Re-187/Os-188 KW - cooling KW - spectra KW - crystal fractionation KW - chondrites KW - chemical composition KW - geochemistry KW - liquid phase KW - gallium KW - isotope ratios KW - LL chondrites KW - cosmochemistry KW - siderophile elements KW - O-18/O-16 KW - ICP mass spectra KW - EET 83230 KW - Antarctica KW - metals KW - magmas KW - sulfur KW - crystallization KW - osmium KW - fractional crystallization KW - 05B:Petrology of meteorites and tektites KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/921717124?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Group+IVA+irons%3B+new+constraints+on+the+crystallization+and+cooling+history+of+an+asteroidal+core+with+a+complex+history&rft.au=McCoy%2C+T+J%3BWalker%2C+R+J%3BGoldstein%2C+J+I%3BYang%2C+J%3BMcDonough%2C+W+F%3BRumble%2C+D%3BChabot%2C+N+L%3BAsh%2C+R+D%3BCorrigan%2C+C+M%3BMichael%2C+J+R%3BKotula%2C+P+G&rft.aulast=McCoy&rft.aufirst=T&rft.date=2011-11-01&rft.volume=75&rft.issue=22&rft.spage=6821&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2011.09.006 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 73 N1 - PubXState - NY N1 - Document feature - illus. incl. 6 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - Antarctica; asteroids; chemical composition; chondrites; cooling; cosmochemistry; crystal fractionation; crystallization; EET 83230; Elephant Moraine Meteorites; fractional crystallization; Fuzzy Creek Meteorite; gallium; geochemistry; ICP mass spectra; inclusions; isotope ratios; isotopes; L chondrites; liquid phase; LL chondrites; magmas; mass spectra; metals; meteorites; O-18/O-16; ordinary chondrites; osmium; oxygen; phase transitions; platinum group; radioactive isotopes; Re-187/Os-188; rhenium; siderophile elements; spectra; stable isotopes; stony meteorites; sulfur; water-rock interaction DO - http://dx.doi.org/10.1016/j.gca.2011.09.006 ER - TY - JOUR T1 - Structure of n-heptane/air triple flames in partially-premixed mixing layers AN - 1709771676; 15792830 AB - Results of a detailed numerical analysis of an n-heptane/air edge flame are presented. The equations of a low-Mach number reacting flow are solved in a two-dimensional domain using detailed models for species transport and chemical reactions. The reaction mechanism involves 560 species and 2538 reversible reactions. We consider an edge flame that is established in a mixing layer with a uniform velocity field. The mixing layer spans the equivalence ratios between pure air and 3.5. The detailed model enables us to analyze the chemical structure of the n-heptane edge flame. We identify major species profiles, discuss reactions causing the heat-release, and exploit Computational Singular Perturbation (CSP) to discuss the main fuel-consumption pathways and the structure of explosive modes in the edge flame. This analysis is performed for several regions in the edge flame to discuss the different processes at work in the premixed branches and the trailing diffusion flame. We compare different cuts through the 2D edge flame to canonical 1D premixed and diffusion flames. We also analyze the accuracy of a skeletal mechanism which was previously developed using CSP from homogeneous ignition calculations of n-heptane and show that a significant reduction in size of the mechanism can be achieved without a significant decrease in accuracy of the edge flame computation. This skeletal mechanism is then used to study the effects of increasing the equivalence ratio in the partially-premixed fuel stream. JF - Combustion and Flame AU - Prager, J AU - Najm, H N AU - Valorani, M AU - Goussis, DA AD - Sandia National Laboratories, Livermore, CA 94551-0969, USA jprager@sandia.gov Y1 - 2011/11// PY - 2011 DA - November 2011 SP - 2128 EP - 2144 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 158 IS - 11 SN - 0010-2180, 0010-2180 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Aerospace & High Technology Database (AH) KW - Edge flames KW - Triple flames KW - n-heptane KW - Reduction KW - Diffusion flames KW - Computation KW - Mathematical models KW - Two dimensional KW - Accuracy KW - Equivalence ratio KW - Combustion UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1709771676?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Combustion+and+Flame&rft.atitle=Structure+of+n-heptane%2Fair+triple+flames+in+partially-premixed+mixing+layers&rft.au=Prager%2C+J%3BNajm%2C+H+N%3BValorani%2C+M%3BGoussis%2C+DA&rft.aulast=Prager&rft.aufirst=J&rft.date=2011-11-01&rft.volume=158&rft.issue=11&rft.spage=2128&rft.isbn=&rft.btitle=&rft.title=Combustion+and+Flame&rft.issn=00102180&rft_id=info:doi/10.1016%2Fj.combustflame.2011.03.017 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-03-01 N1 - Last updated - 2016-11-03 DO - http://dx.doi.org/10.1016/j.combustflame.2011.03.017 ER - TY - CPAPER T1 - Membrane deformation: optical sensing and modeling of cellular mechanics T2 - 63rd Southeast Regional Meeting of the American Chemical Society (SERMACS 2011) AN - 1312932514; 6040831 JF - 63rd Southeast Regional Meeting of the American Chemical Society (SERMACS 2011) AU - Sasaki, Darryl Y1 - 2011/10/26/ PY - 2011 DA - 2011 Oct 26 KW - deformation KW - Membranes KW - Deformation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312932514?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=63rd+Southeast+Regional+Meeting+of+the+American+Chemical+Society+%28SERMACS+2011%29&rft.atitle=Membrane+deformation%3A+optical+sensing+and+modeling+of+cellular+mechanics&rft.au=Sasaki%2C+Darryl&rft.aulast=Sasaki&rft.aufirst=Darryl&rft.date=2011-10-26&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=63rd+Southeast+Regional+Meeting+of+the+American+Chemical+Society+%28SERMACS+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://abstracts.acs.org/chem/sermacs/program/divisionindex.php?act=session&val=102602&prog=102602 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Hydrofluoroether electrolytes for lithium-ion batteries: Reduced gas decomposition and nonflammable AN - 918046509; 15614026 AB - The optimum combination of high energy density at the desired power sets lithium-ion battery technology apart from the other well known secondary battery chemistries. However, this is besieged by thermal instability of the electrolyte. This "Achilles heel" still remains a significant safety issue and unless this propensity is improved the promise of widespread adoption of Li-ion batteries for Transportation application may not be realized. With this in mind we launched a systematic study to evaluate fluoro solvents that are known to be nonflammable, for thermal and electrochemical performances. We investigated hydro-fluoro-ethers (HFE) (1) 2-trifluoromethyl-3-methoxyperfluoropentane {TMMP} and (2) 2-trifluoro-2-fluoro-3-difluoropropoxy-3-difluoro-4-fluoro-5-trifl u oropentane {TPTP} in Sandia-built cells. Thermal properties under near abuse conditions that exist in thermal runaway environment and the electrochemical characteristics for these electrolytes were measured. In the thermal ramp (TR) measurement, EC:DEC:TPTP-1 M LiBETI (or TFSI or LiPF sub(6) electrolytes exhibited no ignition/fire. Similar behavior was observed for the EC:DEC:TMMP-1 M LiBETI. Further, in ARC studies the HFE electrolytes generated less gas by 50% compared to the EC:EMC-1.2 M LiPF) sub(6) {CAR-1} electrolyte. Although in all cases the HFEs generated less gas, the onset of gas generation appears to depend on the salt. For the LiBETI and TFSI containing HFEs the onset is pushed out by [not, vert, similar]80 degree C and for the LiPF sub(6 the onset is comparable to that of the CAR-1. The solution ionic conductivity of these HFE electrolytes was lower (4-5 times) than that of the CAR-1 electrolyte however, the electrochemical performance was comparable. For example, full cells in 2032 type coin cells containing LiMN) sub(0).33Ni sub(0.33Co) sub(0).33O sub(2 cathode and carbon anode showed around 5 mA h capacity and the computed specific capacity was [not, vert, similar]154 mA h for all the electrolytes. In half-cells against lithium the cathode and anode gave specific capacity on the order of 170 mA h and 340 mA h respectively. These electrolytes when tested in 18,650 cells containing the above cathode and anode also showed comparable capacity. Further, the voltage stability window was not compromised by the HFEs. ARC measurements on 18,650 full cells showed less gas generation for the HFE electrolytes compared to CAR-1 electrolyte.) JF - Journal of Power Sources AU - Nagasubramanian, Ganesan AU - Orendorff, Christopher J Y1 - 2011/10/15/ PY - 2011 DA - 2011 Oct 15 SP - 8604 EP - 8609 PB - Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 196 IS - 20 SN - 0378-7753, 0378-7753 KW - Environment Abstracts KW - Hydro fluoro ether KW - Nonflammable KW - Cathode KW - Anode KW - 18,650-cell KW - Fires KW - Salts KW - Transportation KW - Batteries KW - Solvents KW - electrolytes KW - Electrochemistry KW - Decomposition KW - Lithium KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/918046509?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Power+Sources&rft.atitle=Hydrofluoroether+electrolytes+for+lithium-ion+batteries%3A+Reduced+gas+decomposition+and+nonflammable&rft.au=Nagasubramanian%2C+Ganesan%3BOrendorff%2C+Christopher+J&rft.aulast=Nagasubramanian&rft.aufirst=Ganesan&rft.date=2011-10-15&rft.volume=196&rft.issue=20&rft.spage=8604&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/10.1016%2Fj.jpowsour.2011.05.078 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-01-01 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Salts; Fires; Transportation; Batteries; Solvents; electrolytes; Electrochemistry; Decomposition; Lithium DO - http://dx.doi.org/10.1016/j.jpowsour.2011.05.078 ER - TY - JOUR T1 - Preparation of the liquid lithium divertor plates for NSTX AN - 918062571; 16136241 AB - Each of the four toroidal panels of the liquid lithium divertor being installed in NSTX for operation in the 2010 campaign is a conical section inclined at 22 degree like the previous graphite divertor tiles. Each panel is a copper plate clad with stainless steel and a surface layer of porous plasma sprayed molybdenum (Mo) that will host lithium deposited from an evaporator. This paper describes the processes in fabrication; these include cutting to rough shape, die pressing into conical sections, machining to near final shape with holes for electrical heaters, thermocouples and a groove for a cooling tube, brazing of the 0.25-mm cladding and vacuum plasma spraying of the Mo coating. JF - Journal of Nuclear Materials AU - Nygren, R E AU - McKee, G R AU - Fordham, JA AU - Lewis, SA AU - Kugel, H AU - Ellis, R A AU - Viola, ME AU - O'Dell, J S AD - Sandia National Laboratories, PO Box 5800, Albuquerque, NM 87185, USA, renygre@sandia.gov Y1 - 2011/10/01/ PY - 2011 DA - 2011 Oct 01 SP - 592 EP - 596 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 417 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Molybdenum KW - Radioactive materials KW - Copper KW - Steel KW - Lithium KW - Coatings KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/918062571?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Preparation+of+the+liquid+lithium+divertor+plates+for+NSTX&rft.au=Nygren%2C+R+E%3BMcKee%2C+G+R%3BFordham%2C+JA%3BLewis%2C+SA%3BKugel%2C+H%3BEllis%2C+R+A%3BViola%2C+ME%3BO%27Dell%2C+J+S&rft.aulast=Nygren&rft.aufirst=R&rft.date=2011-10-01&rft.volume=417&rft.issue=1-3&rft.spage=592&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2010.12.107 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-01-01 N1 - Last updated - 2015-08-05 N1 - SubjectsTermNotLitGenreText - Radioactive materials; Molybdenum; Steel; Copper; Lithium; Coatings DO - http://dx.doi.org/10.1016/j.jnucmat.2010.12.107 ER - TY - JOUR T1 - Monodisperse and polydisperse colloid transport in water-saturated fractures with various orientations: Gravity effects AN - 899165957; 15751178 AB - Numerical experiments are conducted to examine the effects of gravity on monodisperse and polydisperse colloid transport in water-saturated fractures with uniform aperture. Dense colloids travel in water-saturated fractures by advection and diffusion while subject to the influence of gravity. Colloids are assumed to neither attach onto the fracture walls nor penetrate the rock matrix based on the assumptions that they are inert and their size is larger than the pore size of the surrounding solid matrix. Both the size distribution of a colloid plume and colloid density are shown to be significant factors impacting their transport when gravitational forces are important. A constant-spatial-step particle-tracking code simulates colloid plumes with increasing densities transporting in water-saturated fractures while accounting for three forces acting on each particle: a deterministic advective force due to the Poiseuille flow field within the fracture, a random force caused by Brownian diffusion, and the gravitational force. Integer angles of fracture orientation with respect to the horizontal ranging from +/-90 degree are considered: three lognormally distributed colloid plumes with mean particle size of 1 mu m (averaged on a volumetric basis) and standard deviation of 0.6, 1.2 and 1.8 mu m are examined. Colloid plumes are assigned densities of 1.25, 1.5, 1.75 and 2.0g/cm3. The first four spatial moments and the first two temporal moments are estimated as functions of fracture orientation angle and colloid density. Several snapshots of colloid plumes in fractures of different orientations are presented. In all cases, larger particles tend to spread over wider sections of the fracture in the flow direction, but smaller particles can travel faster or slower than larger particles depending on fracture orientation angle. JF - Advances in Water Resources AU - James, Scott C AU - Chrysikopoulos, Constantinos V AD - Sandia National Laboratories, Thermal/Fluid Science & Engineering, P.O. Box 969, Livermore, CA 94551-0969, USA, scjames@sandia.gov Y1 - 2011/10// PY - 2011 DA - October 2011 SP - 1249 EP - 1255 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 34 IS - 10 SN - 0309-1708, 0309-1708 KW - Environment Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Meteorological & Geoastrophysical Abstracts KW - Travel KW - Colloids KW - gravity effects KW - Water resources KW - Particulates KW - Orientation behaviour KW - Advection KW - Standard Deviation KW - Diffusion KW - Plumes KW - Particle size KW - Geologic Fractures KW - Pore Size KW - Density KW - Fractures KW - Numerical experiments KW - Solids KW - advection KW - Accounting KW - Laminar flow KW - Gravity effects KW - Size distribution KW - AQ 00001:Water Resources and Supplies KW - Q2 09267:Gravity and geodesy KW - SW 0810:General KW - M2 551.511:Mechanics and Thermodynamics of the Atmosphere (551.511) KW - ENA 16:Renewable Resources-Water UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/899165957?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=Monodisperse+and+polydisperse+colloid+transport+in+water-saturated+fractures+with+various+orientations%3A+Gravity+effects&rft.au=James%2C+Scott+C%3BChrysikopoulos%2C+Constantinos+V&rft.aulast=James&rft.aufirst=Scott&rft.date=2011-10-01&rft.volume=34&rft.issue=10&rft.spage=1249&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/10.1016%2Fj.advwatres.2011.06.001 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-10-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Particle size; Laminar flow; Colloids; Gravity effects; Fractures; Water resources; Size distribution; Orientation behaviour; Numerical experiments; Advection; Travel; gravity effects; Diffusion; Particulates; advection; Plumes; Geologic Fractures; Standard Deviation; Pore Size; Density; Solids; Accounting DO - http://dx.doi.org/10.1016/j.advwatres.2011.06.001 ER - TY - JOUR T1 - Resource demand implications for US algae biofuels production scale-up AN - 1777165025; 15113966 AB - Photosynthetic microalgae with the potential for high biomass and oil productivities have long been viewed as a promising class of feedstock for biofuels to displace petroleum-based transportation fuels. Algae offer the additional benefits of potentially being produced without using high-value arable land and fresh water, thereby reducing the competition for those resources between expanding biofuels production and conventional agriculture. Algae growth can also be enhanced by the use of supplemental CO sub(2 that could be supplied by redirecting concentrated CO) sub(2) emissions from stationary industrial sources such as fossil-fired power plants, cement plants, fermentation industries, and others. In this way, algae may offer an effective means to capture carbon emissions for reuse in renewable fuels and co-products, while at the same time displacing fossil carbon fuels to help bring about a net reduction in overall carbon emissions. Significant displacement of petroleum fuels will require that algae feedstock production reach large volumes that will put demands on key resources. This scenario-based analysis provides a high-level assessment of land, water, CO sub(2 and nutrient (nitrogen, phosphorus) demands resulting from algae biofuel feedstock production reaching target levels of 10 billion gallons per year (BGY), 20 BGY, 50 BGY, and 100 BGY for four different geographical regions of the United States. Different algae productivities are assumed for each scenario region, where relative productivities are nominally based on annual average solar insolation. The projected resource demands are compared with data that provide an indication of the resource level potentially available in each of the scenario regions. The results suggest that significant resource supply challenges can be expected to emerge as regional algae biofuel production capacity approaches levels of about 10 BGY. The details depend on the geographic region, the target feedstock production volume, and the level of algae productivity that can be achieved. The implications are that the supply of CO) sub(2), nutrients, and water, in particular, can be expected to severely limit the extent to which US production of algae biofuel can be sustainably expanded unless approaches are developed to mitigate these resource constraints in parallel to emergence of a viable algae technology. Land requirements appear to be the least restrictive, particularly in the Western half of the country where larger quantities of potentially suitable classes of land exist. Within the limited scope and assumptions of this analysis, sustainable photosynthetic microalgae biofuel feedstock production in the US in excess of about 10 BGY will likely be a challenge due to other water, CO sub(2 and nutrient resource limitations. Developing algae production approaches that can effectively use non-fresh water resources and minimize both water and nutrient requirements will help reduce resource constraints. Providing adequate CO) sub(2) resources for enhanced algae production appears the biggest challenge, and could emerge as a constraint at oil production levels below 10 BGY. JF - Applied Energy AU - Pate, Ron AU - Klise, Geoff AU - Wu, Ben AD - Earth Systems Analysis, Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185-0735, United States Y1 - 2011/10// PY - 2011 DA - October 2011 SP - 3377 EP - 3388 PB - Elsevier Science, The Boulevard Kidlington Oxford OX5 1GB UK VL - 88 IS - 10 SN - 0306-2619, 0306-2619 KW - Materials Business File (MB); Environmental Engineering Abstracts (EN) KW - Algae KW - Biofuel KW - Land KW - Water KW - CO sub(2) KW - Nutrients KW - Fuels KW - Marketing KW - Feedstock KW - Carbon dioxide KW - Productivity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777165025?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Energy&rft.atitle=Resource+demand+implications+for+US+algae+biofuels+production+scale-up&rft.au=Pate%2C+Ron%3BKlise%2C+Geoff%3BWu%2C+Ben&rft.aulast=Pate&rft.aufirst=Ron&rft.date=2011-10-01&rft.volume=88&rft.issue=10&rft.spage=3377&rft.isbn=&rft.btitle=&rft.title=Applied+Energy&rft.issn=03062619&rft_id=info:doi/10.1016%2Fj.apenergy.2011.04.023 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-10-01 N1 - Last updated - 2016-05-18 DO - http://dx.doi.org/10.1016/j.apenergy.2011.04.023 ER - TY - JOUR T1 - Repository performance modeling in the United States after Yucca Mountain AN - 1011394629; 2012-045314 AB - The total system performance assessment (TSPA) for the proposed Yucca Mountain repository formed one of the primary technical bases for the June 2008 License Application submitted by the United States Department of Energy (DOE) to the Nuclear Regulatory Commission (NRC). The 2008 Yucca Mountain TSPA represented the culmination of more than two decades of advances both in underlying scientific understanding of the site and its engineered barrier systems, and in the application of probabilistic risk assessment methods to the long-term behavior of geologic repositories. The probabilistic estimates of million-year annual radiation doses to hypothetical humans living near the site considered a full range of uncertainties in the performance of natural and engineered systems and the consequences of unlikely disruptive events, as required by NRC regulations, and represented the most complete and detailed development to date of a system-level modeling approach adopted in various forms by most repository programs worldwide. Although the details of the 2008 TSPA were unavoidably site-specific and cannot be readily transferred to other potential disposal concepts, the approach remains broadly applicable and is likely to be an important part of the site selection, characterization, and licensing processes as the United States repository program moves forward. The Department of Energy's Used Fuel Disposition Campaign (within the Office of Nuclear Energy) is currently using simplified modeling tools to evaluate the potential performance of generic disposal concepts including mined repositories in crystalline rocks, clay/shale rocks, and salt, as well as deep boreholes in crystalline rocks. Although greatly simplified by necessity to apply to generic concepts, these performance assessment models build on the insights gained from the Yucca Mountain TSPA and other similar analyses in the US and internationally. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. This abstract is Sandia publication SAND2011-4972A. JF - Abstracts with Programs - Geological Society of America AU - Swift, Peter N AU - Nutt, Mark AU - Anonymous Y1 - 2011/10// PY - 2011 DA - October 2011 SP - 197 PB - Geological Society of America (GSA), Boulder, CO VL - 43 IS - 5 SN - 0016-7592, 0016-7592 KW - United States KW - programs KW - risk management KW - site exploration KW - waste disposal sites KW - Nye County Nevada KW - environmental analysis KW - radioactive waste KW - models KW - environmental management KW - waste management KW - mitigation KW - land management KW - waste disposal KW - Yucca Mountain KW - Nevada KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1011394629?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Repository+performance+modeling+in+the+United+States+after+Yucca+Mountain&rft.au=Swift%2C+Peter+N%3BNutt%2C+Mark%3BAnonymous&rft.aulast=Swift&rft.aufirst=Peter&rft.date=2011-10-01&rft.volume=43&rft.issue=5&rft.spage=197&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - http://gsa.confex.com/gsa/2011AM/finalprogram/abstract_197542.htm LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2011 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2012-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - environmental analysis; environmental management; land management; mitigation; models; Nevada; Nye County Nevada; programs; radioactive waste; risk management; site exploration; United States; waste disposal; waste disposal sites; waste management; Yucca Mountain ER - TY - CPAPER T1 - Verifying Marine-Hydro-Kinetic Energy Generation Simulations Using Snl-Efdc T2 - OCEANS 2011 MTS/IEEE (OCEANS 2011) AN - 1312896032; 6035911 JF - OCEANS 2011 MTS/IEEE (OCEANS 2011) AU - James, Scott AU - Lefantzi, Sophia AU - Barco, Janet AU - Johnson, Erick AU - Roberts, Jesse Y1 - 2011/09/19/ PY - 2011 DA - 2011 Sep 19 KW - Simulation KW - Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312896032?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=OCEANS+2011+MTS%2FIEEE+%28OCEANS+2011%29&rft.atitle=Verifying+Marine-Hydro-Kinetic+Energy+Generation+Simulations+Using+Snl-Efdc&rft.au=James%2C+Scott%3BLefantzi%2C+Sophia%3BBarco%2C+Janet%3BJohnson%2C+Erick%3BRoberts%2C+Jesse&rft.aulast=James&rft.aufirst=Scott&rft.date=2011-09-19&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=OCEANS+2011+MTS%2FIEEE+%28OCEANS+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.oceans11mtsieeekona.org/technical_program.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Modeling slug tests in unconfined aquifers taking into account water table kinematics, wellbore skin and inertial effects AN - 916840128; 2012-013939 AB - Two models for slug tests conducted in unconfined aquifers are developed by (a) extending the unconfined KGS solution to oscillatory responses, yielding a model referred to herein as the unified model, and (b) replacing the constant head condition with the linearized kinematic condition at the water table. The models can be used to analyze the full range of responses from highly oscillatory to overdamped. The second model, referred to as the moving water table (MWT) model, is only applicable when effects of well bore skin are negligible. The models are validated by comparison with published solutions, and by application to a published case study of field tests conducted in wells without skin in an unconfined aquifer at the MSEA site in Nebraska. In this regard (a) the MWT model essentially yields the same results as the confined KGS model, except very close to the water table, and (b) the unified model yields slightly smaller aquifer K-values relative to the MWT model at all positions in the well. All model solutions yield comparable results when fitted to published field data obtained in an unconfined fluvial aquifer at the MSEA site in Nebraska. The unified model is fitted to field data collected in wells known to exhibit positive skin effects at the Boise Hydrogeophysical Research Site (BHRS) in Boise, Idaho. It is shown to yield hydraulic conductivity estimates of comparable magnitude to those obtained with the KGS model for overdamped responses, and the Springer-Gelhar model for oscillatory responses. Sensitivity of the MWT model to specific yield, S (sub y) , and hydraulic anisotropy, kappa is evaluated and the results, when plotted in log-log space and with consideration of log-scale time derivatives of the response, indicate that these two parameters should be estimable from slug test data, though challenges still remain. JF - Journal of Hydrology AU - Malama, Bwalya AU - Kuhlman, Kristopher L AU - Barrash, Warren AU - Cardiff, Michael AU - Thoma, Michael Y1 - 2011/09// PY - 2011 DA - September 2011 SP - 113 EP - 126 PB - Elsevier, Amsterdam VL - 408 IS - 1-2 SN - 0022-1694, 0022-1694 KW - United States KW - slug tests KW - prediction KW - boundary conditions KW - ground water KW - aquifers KW - models KW - water table KW - kinematics KW - sensitivity analysis KW - mathematical methods KW - Nebraska KW - unconfined aquifers KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/916840128?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology&rft.atitle=Modeling+slug+tests+in+unconfined+aquifers+taking+into+account+water+table+kinematics%2C+wellbore+skin+and+inertial+effects&rft.au=Malama%2C+Bwalya%3BKuhlman%2C+Kristopher+L%3BBarrash%2C+Warren%3BCardiff%2C+Michael%3BThoma%2C+Michael&rft.aulast=Malama&rft.aufirst=Bwalya&rft.date=2011-09-01&rft.volume=408&rft.issue=1-2&rft.spage=113&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2011.07.028 L2 - http://www.sciencedirect.com/science/journal/00221694 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 23 N1 - Document feature - illus. incl. 5 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - aquifers; boundary conditions; ground water; kinematics; mathematical methods; models; Nebraska; prediction; sensitivity analysis; slug tests; unconfined aquifers; United States; water table DO - http://dx.doi.org/10.1016/j.jhydrol.2011.07.028 ER - TY - JOUR T1 - Quantification of margins and uncertainties: Example analyses from reactor safety and radioactive waste disposal involving the separation of aleatory and epistemic uncertainty AN - 879480380; 15128019 AB - In 2001, the National Nuclear Security Administration (NNSA) of the U.S. Department of Energy (DOE) in conjunction with the national security laboratories (i.e., Los Alamos National Laboratory, Lawrence Livermore National Laboratory, and Sandia National Laboratories) initiated development of a process designated quantification of margins and uncertainties (QMU) for the use of risk assessment methodologies in the certification of the reliability and safety of the nation's nuclear weapons stockpile. A previous presentation, "Quantification of Margins and Uncertainties: Conceptual and Computational Basis," describes the basic ideas that underlie QMU and illustrates these ideas with two notional examples. The basic ideas and challenges that underlie NNSA's mandate for QMU are present, and have been successfully addressed, in a number of past analyses for complex systems. To provide perspective on the implementation of a requirement for QMU in the analysis of a complex system, three past analyses are presented as examples: (i) the probabilistic risk assessment carried out for the Surry Nuclear Power Station as part of the U.S. Nuclear Regulatory Commission's (NRC's) reassessment of the risk from commercial nuclear power in the United States (i.e., the NUREG-1150 study), (ii) the performance assessment for the Waste Isolation Pilot Plant carried out by the DOE in support of a successful compliance certification application to the U.S. Environmental Agency, and (iii) the performance assessment for the proposed high-level radioactive waste repository at Yucca Mountain, Nevada, carried out by the DOE in support of a license application to the NRC. Each of the preceding analyses involved a detailed treatment of uncertainty and produced results used to establish compliance with specific numerical requirements on the performance of the system under study. As a result, these studies illustrate the determination of both margins and the uncertainty in margins in real analyses. JF - Reliability Engineering & System Safety AU - Helton, Jon C AU - Johnson, Jay D AU - Sallaberry, Cedric J AD - Department of Mathematics and Statistics, Arizona State University, Tempe, AZ 85287-1804, USA, jchelto@sandia.gov Y1 - 2011/09// PY - 2011 DA - Sep 2011 SP - 1014 EP - 1033 PB - Elsevier Science, The Boulevard Kidlington Oxford OX5 1GB UK VL - 96 IS - 9 SN - 0951-8320, 0951-8320 KW - Risk Abstracts; Health & Safety Science Abstracts KW - Aleatory uncertainty KW - Epistemic uncertainty KW - Performance assessment KW - Quantification of margins and uncertainties KW - Radioactive waste disposal KW - Reactor safety KW - Risk assessment KW - Uncertainty analysis KW - USA, Nevada, Yucca Mt. KW - Compliance KW - Radioactive wastes KW - USA, Nevada KW - USA, New Mexico, Los Alamos KW - security KW - certification KW - Nuclear power plants KW - safety engineering KW - performance assessment KW - Hazardous wastes KW - H 8000:Radiation Safety/Electrical Safety KW - R2 23020:Technological risks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/879480380?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Quantification+of+margins+and+uncertainties%3A+Example+analyses+from+reactor+safety+and+radioactive+waste+disposal+involving+the+separation+of+aleatory+and+epistemic+uncertainty&rft.au=Helton%2C+Jon+C%3BJohnson%2C+Jay+D%3BSallaberry%2C+Cedric+J&rft.aulast=Helton&rft.aufirst=Jon&rft.date=2011-09-01&rft.volume=96&rft.issue=9&rft.spage=1014&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/10.1016%2Fj.ress.2011.02.012 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-07-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Risk assessment; Nuclear power plants; certification; safety engineering; Compliance; Radioactive wastes; security; performance assessment; Hazardous wastes; USA, Nevada, Yucca Mt.; USA, New Mexico, Los Alamos; USA, Nevada DO - http://dx.doi.org/10.1016/j.ress.2011.02.012 ER - TY - JOUR T1 - Ideas underlying the Quantification of Margins and Uncertainties AN - 879480379; 15128015 AB - Key ideas underlying the application of Quantification of Margins and Uncertainties (QMU) to nuclear weapons stockpile lifecycle decisions are described. While QMU is a broad process and methodology for generating critical technical information to be used in U.S. nuclear weapon stockpile management, this paper emphasizes one component, which is information produced by computational modeling and simulation. In particular, the following topics are discussed: (i) the key principles of developing QMU information in the form of Best Estimate Plus Uncertainty, (ii) the need to separate aleatory and epistemic uncertainty in QMU, and (iii) the properties of risk-informed decision making (RIDM) that are best suited for effective application of QMU. The paper is written at a high level, but provides an extensive bibliography of useful papers for interested readers to deepen their understanding of the presented ideas. JF - Reliability Engineering & System Safety AU - Pilch, Martin AU - Trucano, Timothy G AU - Helton, Jon C AD - Department 1514, Sandia National Laboratories, Albuquerque, NM 87185-0828, USA, mpilch@sandia.gov Y1 - 2011/09// PY - 2011 DA - Sep 2011 SP - 965 EP - 975 PB - Elsevier Science, The Boulevard Kidlington Oxford OX5 1GB UK VL - 96 IS - 9 SN - 0951-8320, 0951-8320 KW - Risk Abstracts; Health & Safety Science Abstracts KW - Aleatory uncertainty KW - Epistemic uncertainty KW - Margins KW - Performance assessment KW - QMU KW - Reliability KW - Risk analysis KW - USA KW - Weapons KW - safety engineering KW - Bibliographies KW - life cycle analysis KW - Nuclear weapons KW - Simulation KW - H 8000:Radiation Safety/Electrical Safety KW - R2 23010:General: Models, forecasting UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/879480379?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Ideas+underlying+the+Quantification+of+Margins+and+Uncertainties&rft.au=Pilch%2C+Martin%3BTrucano%2C+Timothy+G%3BHelton%2C+Jon+C&rft.aulast=Pilch&rft.aufirst=Martin&rft.date=2011-09-01&rft.volume=96&rft.issue=9&rft.spage=965&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/10.1016%2Fj.ress.2011.03.016 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-07-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Weapons; safety engineering; life cycle analysis; Bibliographies; Nuclear weapons; Simulation; USA DO - http://dx.doi.org/10.1016/j.ress.2011.03.016 ER - TY - JOUR T1 - Quantification of margins and uncertainties: Conceptual and computational basis AN - 879478909; 15128021 AB - In 2001, the National Nuclear Security Administration of the U.S. Department of Energy in conjunction with the national security laboratories (i.e., Los Alamos National Laboratory, Lawrence Livermore National Laboratory and Sandia National Laboratories) initiated development of a process designated Quantification of Margins and Uncertainties (QMU) for the use of risk assessment methodologies in the certification of the reliability and safety of the nation's nuclear weapons stockpile. This presentation discusses and illustrates the conceptual and computational basis of QMU in analyses that use computational models to predict the behavior of complex systems. The following topics are considered: (i) the role of aleatory and epistemic uncertainty in QMU, (ii) the representation of uncertainty with probability, (iii) the probabilistic representation of uncertainty in QMU analyses involving only epistemic uncertainty, and (iv) the probabilistic representation of uncertainty in QMU analyses involving aleatory and epistemic uncertainty. JF - Reliability Engineering & System Safety AU - Helton, Jon C AD - Department of Mathematics and Statistics, Arizona State University, Tempe, AZ 85287-1804, USA, jchelto@sandia.gov Y1 - 2011/09// PY - 2011 DA - Sep 2011 SP - 976 EP - 1013 PB - Elsevier Science, The Boulevard Kidlington Oxford OX5 1GB UK VL - 96 IS - 9 SN - 0951-8320, 0951-8320 KW - Risk Abstracts; Health & Safety Science Abstracts KW - Aleatory uncertainty KW - Epistemic uncertainty KW - Performance assessment KW - Quantification of margins and uncertainties KW - Risk assessment KW - Sensitivity analysis KW - Uncertainty analysis KW - certification KW - USA KW - Weapons KW - safety engineering KW - Nuclear weapons KW - Nuclear energy KW - USA, New Mexico, Los Alamos KW - security KW - H 8000:Radiation Safety/Electrical Safety KW - R2 23020:Technological risks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/879478909?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reliability+Engineering+%26+System+Safety&rft.atitle=Quantification+of+margins+and+uncertainties%3A+Conceptual+and+computational+basis&rft.au=Helton%2C+Jon+C&rft.aulast=Helton&rft.aufirst=Jon&rft.date=2011-09-01&rft.volume=96&rft.issue=9&rft.spage=976&rft.isbn=&rft.btitle=&rft.title=Reliability+Engineering+%26+System+Safety&rft.issn=09518320&rft_id=info:doi/10.1016%2Fj.ress.2011.03.017 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-07-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Risk assessment; certification; Weapons; safety engineering; Nuclear weapons; Nuclear energy; security; USA; USA, New Mexico, Los Alamos DO - http://dx.doi.org/10.1016/j.ress.2011.03.017 ER - TY - JOUR T1 - Computational issues and applications of line-elements to model subsurface flow governed by the modified Helmholtz equation AN - 1686059144; 2015-050404 AB - Two new approaches are presented for the accurate computation of the potential due to line elements that satisfy the modified Helmholtz equation with complex parameters. The first approach is based on fundamental solutions in elliptical coordinates and results in products of Mathieu functions. The second approach is based on the integration of modified Bessel functions. Both approaches allow evaluation of the potential at any distance from the element. The computational approaches are applied to model transient flow with the Laplace transform analytic element method. The Laplace domain solution is computed using a combination of point elements and the presented line elements. The time domain solution is obtained through a numerical inversion. Two applications are presented to transient flow fields, which could not be modeled with the Laplace transform analytic element method prior to this work. The first application concerns transient single-aquifer flow to wells near impermeable walls modeled with line-doublets. The second application concerns transient two-aquifer flow to a well near a stream modeled with line-sinks. Abstract Copyright (2011) Elsevier, B.V. JF - Advances in Water Resources AU - Bakker, Mark AU - Kuhlman, Kristopher L Y1 - 2011/09// PY - 2011 DA - September 2011 SP - 1186 EP - 1194 PB - Elsevier, Oxford VL - 34 IS - 9 SN - 0309-1708, 0309-1708 KW - functions KW - numerical analysis KW - sinks KW - pumping KW - injection KW - fluid flow KW - inverse problem KW - equations KW - Laplace transformations KW - ground water KW - aquifers KW - drawdown KW - hydraulic head KW - transient phenomena KW - streams KW - algorithms KW - water wells KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686059144?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=Computational+issues+and+applications+of+line-elements+to+model+subsurface+flow+governed+by+the+modified+Helmholtz+equation&rft.au=Bakker%2C+Mark%3BKuhlman%2C+Kristopher+L&rft.aulast=Bakker&rft.aufirst=Mark&rft.date=2011-09-01&rft.volume=34&rft.issue=9&rft.spage=1186&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/10.1016%2Fj.advwatres.2011.02.008 L2 - http://www.sciencedirect.com/science/journal/03091708 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2015-01-01 N1 - Last updated - 2015-06-05 N1 - SubjectsTermNotLitGenreText - algorithms; aquifers; drawdown; equations; fluid flow; functions; ground water; hydraulic head; injection; inverse problem; Laplace transformations; numerical analysis; pumping; sinks; streams; transient phenomena; water wells DO - http://dx.doi.org/10.1016/j.advwatres.2011.02.008 ER - TY - JOUR T1 - Low-hazard metallography of moisture-sensitive electrochemical cells AN - 910649350; 15451979 AB - A low-hazard approach is presented to prepare metallographic cross-sections of moisture-sensitive battery components. The approach is tailored for evaluation of thermal (molten salt) batteries composed of thin pressed-powder pellets, but has general applicability to other battery electrochemistries. Solution-cast polystyrene is used to encapsulate cells before embedding in epoxy. Nonaqueous grinding and polishing are performed in an industrial dry room to increase throughput. Lapping oil is used as a lubricant throughout grinding. Hexane is used as the solvent throughout processing; occupational exposure levels are well below the limits. Light optical and scanning electron microscopy on cross-sections are used to analyse a thermal battery cell. Spatially resolved X-ray diffraction on oblique angle cut cells complement the metallographic analysis. JF - Journal of Microscopy (Oxford) AU - Wesolowski, De AU - Rodriguez, Ma AU - McKenzie, B B AU - PAPENGUTH, H W AD - Power Sources Technology Group, Sandia National Laboratories, U.S.A. Y1 - 2011/08// PY - 2011 DA - Aug 2011 SP - 197 EP - 205 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 243 IS - 2 SN - 0022-2720, 0022-2720 KW - Health & Safety Science Abstracts KW - Oil KW - Salts KW - Batteries KW - Microscopy KW - Solvents KW - Electrochemistry KW - X-ray diffraction KW - Occupational exposure KW - H 1000:Occupational Safety and Health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/910649350?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Microscopy+%28Oxford%29&rft.atitle=Low-hazard+metallography+of+moisture-sensitive+electrochemical+cells&rft.au=Wesolowski%2C+De%3BRodriguez%2C+Ma%3BMcKenzie%2C+B+B%3BPAPENGUTH%2C+H+W&rft.aulast=Wesolowski&rft.aufirst=De&rft.date=2011-08-01&rft.volume=243&rft.issue=2&rft.spage=197&rft.isbn=&rft.btitle=&rft.title=Journal+of+Microscopy+%28Oxford%29&rft.issn=00222720&rft_id=info:doi/10.1111%2Fj.1365-2818.2011.03494.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-10-01 N1 - Number of references - 3 N1 - Document feature - figure 8 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Oil; Salts; Batteries; Microscopy; Solvents; X-ray diffraction; Electrochemistry; Occupational exposure DO - http://dx.doi.org/10.1111/j.1365-2818.2011.03494.x ER - TY - JOUR T1 - Sedimentary underplating at the Cascadia mantle-wedge corner revealed by seismic imaging AN - 894807818; 2011-080400 JF - Nature Geoscience AU - Calvert, Andrew J AU - Preston, Leiph A AU - Farahbod, Amir M Y1 - 2011/08// PY - 2011 DA - August 2011 SP - 545 EP - 548 PB - Nature Publishing Group, London VL - 4 IS - 8 SN - 1752-0894, 1752-0894 KW - velocity analysis KW - United States KW - tomography KW - oceanic crust KW - subduction zones KW - mantle KW - waveforms KW - low-velocity zones KW - Western U.S. KW - mantle wedges KW - seismic profiles KW - three-dimensional models KW - geophysical methods KW - British Columbia KW - teleseismic signals KW - seismic methods KW - plate tectonics KW - Canada KW - underplating KW - Western Canada KW - geophysical profiles KW - Cascadia subduction zone KW - image analysis KW - crust KW - 18:Solid-earth geophysics KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/894807818?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+Geoscience&rft.atitle=Sedimentary+underplating+at+the+Cascadia+mantle-wedge+corner+revealed+by+seismic+imaging&rft.au=Calvert%2C+Andrew+J%3BPreston%2C+Leiph+A%3BFarahbod%2C+Amir+M&rft.aulast=Calvert&rft.aufirst=Andrew&rft.date=2011-08-01&rft.volume=4&rft.issue=8&rft.spage=545&rft.isbn=&rft.btitle=&rft.title=Nature+Geoscience&rft.issn=17520894&rft_id=info:doi/10.1038%2FNGEO1195 L2 - http://www.nature.com/ngeo/index.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2011-01-01 N1 - Number of references - 30 N1 - Document feature - sects., geol. sketch maps N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - British Columbia; Canada; Cascadia subduction zone; crust; geophysical methods; geophysical profiles; image analysis; low-velocity zones; mantle; mantle wedges; oceanic crust; plate tectonics; seismic methods; seismic profiles; subduction zones; teleseismic signals; three-dimensional models; tomography; underplating; United States; velocity analysis; waveforms; Western Canada; Western U.S. DO - http://dx.doi.org/10.1038/NGEO1195 ER - TY - JOUR T1 - Comparative cost analysis of algal oil production for biofuels AN - 893265563; 15589360 AB - Economic analysis is an essential evaluation for considering feasibility and viability of large-scale, photoautotrophic algae-based, biofuel production. Thus far, economic analysis has been conducted on a scenario-by-scenario basis which does not allow for cross-comparisons. In 2008, a comparative study was carried out using a cross-section of cost analyses consisting of 12 public studies. The resulting triacylglyceride cost had a spread of two orders of magnitude excluding two studies which were intended for specialty chemicals. The cost spread can be largely attributed to disparate assumptions and uncertainties in economic and process inputs. To address this disparity, four partners from research, academia, and industry collaborated on a harmonization study to estimate algal oil production costs based on a common framework. The updated cost comparison based on a normalized set of input assumptions was found to greatly reduce economic variability, resulting in algal oil production costs ranging from $10.87 gallon super(-1 to $13.32 gallon) super(-)1. JF - Energy AU - Sun, Amy AU - Davis, Ryan AU - Starbuck, Meghan AU - Ben-Amotz, Ami AU - Pate, Ron AU - Pienkos, Philip T Y1 - 2011/08// PY - 2011 DA - Aug 2011 SP - 5169 EP - 5179 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 36 IS - 8 SN - 0360-5442, 0360-5442 KW - Microbiology Abstracts C: Algology, Mycology & Protozoology; Environment Abstracts; Sustainability Science Abstracts KW - Algae KW - Triacylglyceride KW - Economics KW - Autotrophic KW - Scale-up biofuel production KW - Chemicals KW - Feasibility studies KW - Fuel technology KW - comparative studies KW - biofuels KW - Oil KW - Energy KW - cost analysis KW - Oil and gas production KW - Biofuels KW - economic analysis KW - ENA 03:Energy KW - M3 1010:Issues in Sustainable Development KW - K 03400:Human Diseases UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/893265563?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy&rft.atitle=Comparative+cost+analysis+of+algal+oil+production+for+biofuels&rft.au=Sun%2C+Amy%3BDavis%2C+Ryan%3BStarbuck%2C+Meghan%3BBen-Amotz%2C+Ami%3BPate%2C+Ron%3BPienkos%2C+Philip+T&rft.aulast=Sun&rft.aufirst=Amy&rft.date=2011-08-01&rft.volume=36&rft.issue=8&rft.spage=5169&rft.isbn=&rft.btitle=&rft.title=Energy&rft.issn=03605442&rft_id=info:doi/10.1016%2Fj.energy.2011.06.020 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-09-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Oil; Energy; Economics; Biofuels; Algae; Feasibility studies; Chemicals; Fuel technology; comparative studies; cost analysis; biofuels; Oil and gas production; economic analysis DO - http://dx.doi.org/10.1016/j.energy.2011.06.020 ER - TY - JOUR T1 - Kinetics of elementary reactions in low-temperature autoignition chemistry AN - 889438888; 14978952 AB - Advanced low-temperature combustion concepts that rely on compression ignition have placed new technological demands on the modeling of low-temperature oxidation in general and particularly on fuel effects in autoignition. Furthermore, the increasing use of alternative and non-traditional fuels presents new challenges for combustion modeling and demands accurate rate coefficients and branching fractions for a wider range of reactants. New experimental techniques, as well as modern variants on venerable methods, have recently been employed to investigate the fundamental reactions underlying autoignition in great detail. At the same time, improvements in theoretical kinetics and quantum chemistry have made theory an indispensible partner in reaction kinetics, particularly for complex reaction systems like the alkyl + O sub(2) reactions. This review concentrates on recent developments in the study of elementary reaction kinetics in relation to the modeling and prediction of low-temperature combustion and autoignition, with specific focus placed on the emerging understanding of the critical alkylperoxy and hydroperoxyalkyl reactions. We especially highlight the power of cooperative theoretical and experimental efforts in establishing a rigorous mechanistic understanding of these fundamental reactions. JF - Progress in Energy and Combustion Science AU - Zador, Judit AU - Taatjes, Craig A AU - Fernandes, Ravi X AD - Combustion Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, CA 94551-0969 USA, cataatj@sandia.gov Y1 - 2011/08// PY - 2011 DA - Aug 2011 SP - 371 EP - 421 PB - Pergamon VL - 37 IS - 4 SN - 0360-1285, 0360-1285 KW - Environment Abstracts KW - Chemical kinetics KW - Theoretical kinetics KW - Low-temperature combustion KW - Autoignition KW - Quantum chemistry KW - Biofuels KW - Peroxy radicals KW - Hydroperoxyalkyl radicals KW - Hydrocarbon oxidation KW - Kinetics KW - Fuels KW - Reviews KW - Oxidation KW - cooperatives KW - Combustion KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/889438888?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Progress+in+Energy+and+Combustion+Science&rft.atitle=Kinetics+of+elementary+reactions+in+low-temperature+autoignition+chemistry&rft.au=Zador%2C+Judit%3BTaatjes%2C+Craig+A%3BFernandes%2C+Ravi+X&rft.aulast=Zador&rft.aufirst=Judit&rft.date=2011-08-01&rft.volume=37&rft.issue=4&rft.spage=371&rft.isbn=&rft.btitle=&rft.title=Progress+in+Energy+and+Combustion+Science&rft.issn=03601285&rft_id=info:doi/10.1016%2Fj.pecs.2010.06.006 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-01-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Reviews; Fuels; Kinetics; Oxidation; cooperatives; Combustion DO - http://dx.doi.org/10.1016/j.pecs.2010.06.006 ER - TY - JOUR T1 - Experimental triggers for internal short circuits in lithium-ion cells AN - 889394720; 14946836 AB - Lithium-ion cell field failures due to internal short circuits are a significant concern to the entire lithium-ion cell market from consumer electronics to electric vehicles. While the probability of these failure events occurring is estimated to be very low (1 in 5-10 million), the consequences of a cell failure due to an internal short in a high energy battery system have the potential to be catastrophic. The statistical probability of one of these events is very low and they are difficult to predict and simulate in a laboratory using some external test; which makes cell failure due to an internal short circuit a unique challenge to overcome. Several of the experiments designed to simulate internal shorts have been adopted as testing protocols across the industry; in general, they do not accurately simulate an internal short. This work highlights our efforts to experimentally trigger an internal short circuit in a lithium-ion cell. This work describes the development of an experimental technique to trigger internal short circuits in lithium-ion cells. This technique involves the introduction of a low melting point metal foil during the construction of a cell that causes an internal short after a phase change. Internal shorts can be triggered in 2032 coin cells and 18,650 cells using this approach. Work will continue to develop this technique to control the type and magnitude of the internal short circuit in small and large format lithium-ion cells. JF - Journal of Power Sources AU - Orendorff, Christopher J AU - Roth, EPeter AU - Nagasubramanian, Ganesan AD - Sandia National Laboratories, PO Box 5800, Albuquerque, NM 87185, United States, corendo@sandia.gov Y1 - 2011/08/01/ PY - 2011 DA - 2011 Aug 01 SP - 6554 EP - 6558 PB - Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 196 IS - 15 SN - 0378-7753, 0378-7753 KW - Environment Abstracts KW - Lithiuim-ion cell KW - Battery safety KW - Internal short circuit KW - Metals KW - Electronics industry wastes KW - melting point KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/889394720?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Power+Sources&rft.atitle=Experimental+triggers+for+internal+short+circuits+in+lithium-ion+cells&rft.au=Orendorff%2C+Christopher+J%3BRoth%2C+EPeter%3BNagasubramanian%2C+Ganesan&rft.aulast=Orendorff&rft.aufirst=Christopher&rft.date=2011-08-01&rft.volume=196&rft.issue=15&rft.spage=6554&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/10.1016%2Fj.jpowsour.2011.03.035 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-01-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Metals; Electronics industry wastes; melting point DO - http://dx.doi.org/10.1016/j.jpowsour.2011.03.035 ER - TY - JOUR T1 - Radiation Boundary Conditions for Computational Fluid Dynamics Models of High-Temperature Cavity Receivers AN - 1777145800; 16066725 AB - Rigorous computational fluid dynamics (CFD) codes can accurately simulate complex coupled processes within an arbitrary geometry. CFD can thus be a cost-effective and time-efficient method of guiding receiver design and testing for concentrating solar power technologies. However, it can be computationally prohibitive to include a large multifaceted dish concentrator or a field of hundreds or thousands of heliostats in the model domain. This paper presents a method to allow the CFD code to focus on a cavity receiver domain alone, by rigorously transforming radiance distributions calculated on the receiver aperture into radiance boundary conditions for the CFD simulations. This method allows the incoming radiation to interact with participating media such as falling solid particles in a high-temperature cavity receiver. The radiance boundary conditions of the CFD model can take into consideration complex beam features caused by sun shape, limb darkening, slope errors, heliostat facet shape, multiple heliostats, off-axis aberrations, atmospheric effects, blocking, shading, and multiple focal points. This paper also details implementation examples in ansys fluent for a heliostat field and a dish concentrator, which are validated by comparison to results from delsol and the ray-tracing code asap, respectively. JF - Journal of Solar Energy Engineering (Transactions of the ASME) AU - Khalsa, Siri Sahib S AU - Ho, Clifford K AD - Sandia Staffing Alliance, Under Contract to Sandia National Laboratories, Concentrating Solar Technologies Department, P.O. Box 5800, Albuquerque, NM 87185-1127 Y1 - 2011/08// PY - 2011 DA - August 2011 PB - American Society of Mechanical Engineers, United Engineering Center, 345 E. 47th St. New York NY 10017 United States VL - 133 IS - 3 SN - 0199-6231, 0199-6231 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE); ANTE: Abstracts in New Technologies and Engineering (AN) KW - Radiance KW - Computational fluid dynamics KW - Mathematical models KW - Computer simulation KW - Heliostats KW - Boundary conditions KW - Receivers KW - Holes KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777145800?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Solar+Energy+Engineering+%28Transactions+of+the+ASME%29&rft.atitle=Radiation+Boundary+Conditions+for+Computational+Fluid+Dynamics+Models+of+High-Temperature+Cavity+Receivers&rft.au=Khalsa%2C+Siri+Sahib+S%3BHo%2C+Clifford+K&rft.aulast=Khalsa&rft.aufirst=Siri+Sahib&rft.date=2011-08-01&rft.volume=133&rft.issue=3&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Journal+of+Solar+Energy+Engineering+%28Transactions+of+the+ASME%29&rft.issn=01996231&rft_id=info:doi/10.1115%2F1.4004274 L2 - http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO000133000003031020000001&idtype=cvips&gifs=Yes LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-04-01 N1 - Last updated - 2016-05-18 DO - http://dx.doi.org/10.1115/1.4004274 ER - TY - JOUR T1 - AIMFAST: An Alignment Tool Based on Fringe Reflection Methods Applied To Dish Concentrators AN - 1777145579; 16066723 AB - The proper alignment of facets on a dish engine concentrated solar power system is critical to the performance of the system. These systems are generally highly concentrating to produce high temperatures for maximum thermal efficiency so there is little tolerance for poor optical alignment. Improper alignment can lead to poor performance and shortened life through excessively high flux on the receiver surfaces, imbalanced power on multicylinder engines, and intercept losses at the aperture. Alignment approaches used in the past are time consuming field operations, typically taking 4-6 h per dish with 40-80 facets on the dish. Production systems of faceted dishes will need rapid, accurate alignment implemented in a fraction of an hour. In this paper, we present an extension to our Sandia Optical Fringe Analysis Slope Technique mirror characterization system that will automatically acquire data, implement an alignment strategy, and provide real-time mirror angle corrections to actuators or labor beneath the dish. The Alignment Implementation for Manufacturing using Fringe Analysis Slope Technique (AIMFAST) has been implemented and tested at the prototype level. In this paper we present the approach used in AIMFAST to rapidly characterize the dish system and provide near-real-time adjustment updates for each facet. The implemented approach can provide adjustment updates every 5 s, suitable for manual or automated adjustment of facets on a dish assembly line. JF - Journal of Solar Energy Engineering (Transactions of the ASME) AU - Andraka, Charles E AU - Yellowhair, Julius AU - Trapeznikov, Kirill AU - Carlson, Jeff AU - Myer, Brian AU - Stone, Brad AU - Hunt, Kirby AD - Sandia National Laboratories, P.O. 5800 Albuquerque, NM 87185-1127, USA Department of Physics & Astronomy, CAP 231, Appalachian State University, 525 Rivers St, Boone NC 28608, USA Stirling Energy Systems, 4800 N Scottsdale Road, Suite 5500 Scottsdale, AZ 82521, USA Y1 - 2011/08// PY - 2011 DA - August 2011 PB - American Society of Mechanical Engineers, United Engineering Center, 345 E. 47th St. New York NY 10017 United States VL - 133 IS - 3 SN - 0199-6231, 0199-6231 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE); ANTE: Abstracts in New Technologies and Engineering (AN) KW - Engines KW - Fringe analysis KW - Apertures KW - Flux KW - Bulging KW - Reflection KW - Alignment KW - Tools KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777145579?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Solar+Energy+Engineering+%28Transactions+of+the+ASME%29&rft.atitle=AIMFAST%3A+An+Alignment+Tool+Based+on+Fringe+Reflection+Methods+Applied+To+Dish+Concentrators&rft.au=Andraka%2C+Charles+E%3BYellowhair%2C+Julius%3BTrapeznikov%2C+Kirill%3BCarlson%2C+Jeff%3BMyer%2C+Brian%3BStone%2C+Brad%3BHunt%2C+Kirby&rft.aulast=Andraka&rft.aufirst=Charles&rft.date=2011-08-01&rft.volume=133&rft.issue=3&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Journal+of+Solar+Energy+Engineering+%28Transactions+of+the+ASME%29&rft.issn=01996231&rft_id=info:doi/10.1115%2F1.4004357 L2 - http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO000133000003031018000001&idtype=cvips&gifs=Yes LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-04-01 N1 - Last updated - 2016-05-18 DO - http://dx.doi.org/10.1115/1.4004357 ER - TY - JOUR T1 - Evaluation of Annual Performance of 2-Tank and Thermocline Thermal Storage Systems for Trough Plants AN - 1671411361; 16066728 AB - A study was performed to compare the annual performance of 50 MWe Andasol-like trough plants that employ either a 2-tank or a thermocline-type molten-salt thermal storage system. trnsys software was used to create the plant models and to perform the annual simulations. The annual performance of each plant was found to be nearly identical in the base-case comparison. The reason that the thermocline exhibited nearly the same performance is primarily due to the ability of many trough power blocks to operate at a temperature that is significantly below the design point. However, if temperatures close to the design point are required, the performance of the 2-tank plant would be significantly better than the thermocline. JF - Journal of Solar Energy Engineering (Transactions of the ASME) AU - Kolb, Gregory J AD - Distinguished Member of Technical Staff, Sandia National Laboratories, MS1127, Albuquerque, NM 87185 Y1 - 2011/08// PY - 2011 DA - August 2011 PB - American Society of Mechanical Engineers, United Engineering Center, 345 E. 47th St. New York NY 10017 United States VL - 133 IS - 3 SN - 0199-6231, 0199-6231 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE); ANTE: Abstracts in New Technologies and Engineering (AN) KW - Software KW - Computer programs KW - Computer simulation KW - Design engineering KW - Thermoclines KW - Power plants KW - Thermal storage KW - Solar energy KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671411361?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Solar+Energy+Engineering+%28Transactions+of+the+ASME%29&rft.atitle=Evaluation+of+Annual+Performance+of+2-Tank+and+Thermocline+Thermal+Storage+Systems+for+Trough+Plants&rft.au=Kolb%2C+Gregory+J&rft.aulast=Kolb&rft.aufirst=Gregory&rft.date=2011-08-01&rft.volume=133&rft.issue=3&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Journal+of+Solar+Energy+Engineering+%28Transactions+of+the+ASME%29&rft.issn=01996231&rft_id=info:doi/10.1115%2F1.4004239 L2 - http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO000133000003031023000001&idtype=cvips&gifs=Yes LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-04-01 N1 - Last updated - 2016-05-18 DO - http://dx.doi.org/10.1115/1.4004239 ER - TY - JOUR T1 - Methodology to Assess Potential Glint and Glare Hazards From Concentrating Solar Power Plants: Analytical Models and Experimental Validation AN - 1671287813; 16066726 AB - With a growing number of concentrating solar power systems being designed and developed, the potential impact of glint and glare from concentrating solar collectors and receivers is receiving increased attention as a potential hazard or as a distraction for motorists, pilots, and pedestrians. This paper provides analytical methods to evaluate the irradiance originating from specularly and diffusely reflecting sources as a function of distance and characteristics of the source. Sample problems are provided for both specular and diffuse sources, and validation of the models is performed via testing. In addition, a summary of safety metrics is compiled from the literature to evaluate the potential hazards of calculated irradiances from glint and glare for short-term exposures. Previous safety metrics have focused on prevention of permanent eye damage (e.g., retinal burn). New metrics used in this paper account for temporary after-image, which can occur at irradiance values several orders of magnitude lower than the irradiance values required for irreversible eye damage. JF - Journal of Solar Energy Engineering (Transactions of the ASME) AU - Ho, Clifford K AU - Ghanbari, Cheryl M AU - Diver, Richard B AD - Concentrating Solar Technologies Department, Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185-1127 Y1 - 2011/08// PY - 2011 DA - August 2011 PB - American Society of Mechanical Engineers, United Engineering Center, 345 E. 47th St. New York NY 10017 United States VL - 133 IS - 3 SN - 0199-6231, 0199-6231 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE); ANTE: Abstracts in New Technologies and Engineering (AN) KW - Hazards KW - Glint KW - Damage KW - Mathematical models KW - Irradiance KW - Diffusion KW - Mathematical analysis KW - Glare KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671287813?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Solar+Energy+Engineering+%28Transactions+of+the+ASME%29&rft.atitle=Methodology+to+Assess+Potential+Glint+and+Glare+Hazards+From+Concentrating+Solar+Power+Plants%3A+Analytical+Models+and+Experimental+Validation&rft.au=Ho%2C+Clifford+K%3BGhanbari%2C+Cheryl+M%3BDiver%2C+Richard+B&rft.aulast=Ho&rft.aufirst=Clifford&rft.date=2011-08-01&rft.volume=133&rft.issue=3&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Journal+of+Solar+Energy+Engineering+%28Transactions+of+the+ASME%29&rft.issn=01996231&rft_id=info:doi/10.1115%2F1.4004349 L2 - http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO000133000003031021000001&idtype=cvips&gifs=Yes LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-04-01 N1 - Last updated - 2016-05-18 DO - http://dx.doi.org/10.1115/1.4004349 ER - TY - JOUR T1 - Fabrication of a nanostructure thermal property measurement platform. AN - 868997434; 21602618 AB - Measurements of the electrical and thermal transport properties of one-dimensional nanostructures (e.g. nanotubes and nanowires) are typically obtained without detailed knowledge of the specimen's atomic-scale structure or defects. To address this deficiency, we have developed a microfabricated, chip-based characterization platform that enables both transmission electron microscopy (TEM) of the atomic structure and defects as well as measurement of the thermal transport properties of individual nanostructures. The platform features a suspended heater line that physically contacts the center of a suspended nanostructure/nanowire that was placed using in situ scanning electron microscope nanomanipulators. Suspension of the nanostructure across a through-hole enables TEM characterization of the atomic and defect structure (dislocations, stacking faults, etc) of the test sample. This paper explains, in detail, the processing steps involved in creating this thermal property measurement platform. As a model study, we report the use of this platform to measure the thermal conductivity and defect structure of a GaN nanowire. JF - Nanotechnology AU - Harris, C T AU - Martinez, J A AU - Shaner, E A AU - Huang, J Y AU - Swartzentruber, B S AU - Sullivan, J P AU - Chen, G AD - Sandia National Laboratories, PO Box 5800, Albuquerque, NM 87185, USA. ctharri@sandia.gov Y1 - 2011/07/08/ PY - 2011 DA - 2011 Jul 08 SP - 275308 VL - 22 IS - 27 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/868997434?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nanotechnology&rft.atitle=Fabrication+of+a+nanostructure+thermal+property+measurement+platform.&rft.au=Harris%2C+C+T%3BMartinez%2C+J+A%3BShaner%2C+E+A%3BHuang%2C+J+Y%3BSwartzentruber%2C+B+S%3BSullivan%2C+J+P%3BChen%2C+G&rft.aulast=Harris&rft.aufirst=C&rft.date=2011-07-08&rft.volume=22&rft.issue=27&rft.spage=275308&rft.isbn=&rft.btitle=&rft.title=Nanotechnology&rft.issn=1361-6528&rft_id=info:doi/10.1088%2F0957-4484%2F22%2F27%2F275308 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2011-11-28 N1 - Date created - 2011-05-26 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1088/0957-4484/22/27/275308 ER - TY - JOUR T1 - Application of Transfer to American Football: From Observation of Raw Video to Control in a Simulated Environment AN - 907922233; 201109730 AB - Automatic transfer of learned knowledge from one task or domain to another offers great potential to simplify and expedite the construction and deployment of intelligent systems. In practice however, there are many barriers to achieving this goal. In this article, we present a prototype system for the real-world context of transferring knowledge of American football from video through execution and adaptation in the simulator, highlighting the system's component algorithms along with issues of complexity, generality, and scale. We then conclude with a discussion of the implications of this work for other applications, along with several possible improvements. Adapted from the source document. JF - AI Magazine AU - Stracuzzi, David J AU - Fern, Alan AU - Ali, Kamal AU - Hess, Robin AU - Pinto, Jervis AU - Li, Nan AU - Konik, Tolga AU - Shapiro, Dan AD - Sandia National Laboratories Y1 - 2011/07// PY - 2011 DA - July 2011 SP - 107 EP - 125 PB - American Association for Artificial Intelligence VL - 32 IS - 2 SN - 0738-4602, 0738-4602 KW - Artificial intelligence KW - Intelligent systems KW - Simulations KW - Sports KW - Video KW - article KW - 14.12: COMPUTER SCIENCE UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/907922233?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Alisa&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=AI+Magazine&rft.atitle=Application+of+Transfer+to+American+Football%3A+From+Observation+of+Raw+Video+to+Control+in+a+Simulated+Environment&rft.au=Stracuzzi%2C+David+J%3BFern%2C+Alan%3BAli%2C+Kamal%3BHess%2C+Robin%3BPinto%2C+Jervis%3BLi%2C+Nan%3BKonik%2C+Tolga%3BShapiro%2C+Dan&rft.aulast=Stracuzzi&rft.aufirst=David&rft.date=2011-07-01&rft.volume=32&rft.issue=2&rft.spage=107&rft.isbn=&rft.btitle=&rft.title=AI+Magazine&rft.issn=07384602&rft_id=info:doi/ LA - English DB - Library & Information Science Abstracts (LISA) N1 - Date revised - 2011-12-01 N1 - Last updated - 2016-09-27 N1 - SubjectsTermNotLitGenreText - Artificial intelligence; Video; Intelligent systems; Simulations; Sports ER - TY - JOUR T1 - ANSI/HPS CONSENSUS STANDARD N13.3: DOSIMETRY FOR CRITICALITY ACCIDENTS AN - 899171592; 15691944 AB - ANSI/HPS N13.3 provides the acceptable criteria for the design, implementation, and operation of a nuclear accident or criticality dosimeter system. This standard is specific to any dosimeter system used for the assessment of personnel radiation doses that result from the exposure to an accidental nuclear criticality. These dosimeters are part of the emergency preparation program at any facility that has the potential for such accidents. This standard is currently undergoing revision. A brief review of the existing version of the standard, followed by the current status of the new draft and proposed changes will be presented. JF - Health Physics AU - Ward, P AD - Sandia National Laboratories, Albuquerque, NM 87185, USA Y1 - 2011/07// PY - 2011 DA - Jul 2011 SP - 1 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 101 IS - 1 SN - 0017-9078, 0017-9078 KW - Health & Safety Science Abstracts KW - Accidents KW - Reviews KW - Dosimetry KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/899171592?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Health+Physics&rft.atitle=ANSI%2FHPS+CONSENSUS+STANDARD+N13.3%3A+DOSIMETRY+FOR+CRITICALITY+ACCIDENTS&rft.au=Ward%2C+P&rft.aulast=Ward&rft.aufirst=P&rft.date=2011-07-01&rft.volume=101&rft.issue=1&rft.spage=S55&rft.isbn=&rft.btitle=&rft.title=Health+Physics&rft.issn=00179078&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-10-01 N1 - Last updated - 2013-08-12 N1 - SubjectsTermNotLitGenreText - Accidents; Reviews; Dosimetry ER - TY - JOUR T1 - Organic species of lanthanum in natural environments; implications to mobility of rare earth elements in low temperature environments AN - 877850957; 2011-061404 AB - Naturally occurring organic ligands, such as acetate, citrate, malonate, oxalate, and succinate, play important roles in mobility and accumulation of La and other rare earth elements in low temperature systems under Earth surface conditions. However, a comprehensive and consistent thermodynamic database covering the complexes of rare earth elements with those naturally occurring organic ligands is lacking. In this study, thermodynamic data of organic species of rare earth elements (REE) represented by La, with an emphasis on their aqueous complexes with organic ligands, are critically reviewed. The organic ligands covered by this study include acetate, citrate, malonate, oxalate and succinate. In this critical review, the Specific Interaction Theory (SIT) model is adopted for extrapolation to infinite dilution. This model is a reliable activity coefficient model valid for a wide range of ionic strengths. These critically reviewed data, including complex formation constants, SIT interaction coefficients and solubility product constants, would enable accurate modeling of the speciation and solubility of REE in various environments including high ionic strength environments, providing insight into mobility and enrichment of REE in various environments. JF - Applied Geochemistry AU - Xiong, Yongliang Y1 - 2011/07// PY - 2011 DA - July 2011 SP - 1130 EP - 1137 PB - Elsevier, Oxford-New York-Beijing VL - 26 IS - 7 SN - 0883-2927, 0883-2927 KW - esters KW - acetates KW - biochemistry KW - solubility KW - temperature KW - models KW - organic compounds KW - ligands KW - lanthanum KW - phase equilibria KW - dilution KW - metals KW - low temperature KW - rare earths KW - mobilization KW - thermodynamic properties KW - geochemistry KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/877850957?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Geochemistry&rft.atitle=Organic+species+of+lanthanum+in+natural+environments%3B+implications+to+mobility+of+rare+earth+elements+in+low+temperature+environments&rft.au=Xiong%2C+Yongliang&rft.aulast=Xiong&rft.aufirst=Yongliang&rft.date=2011-07-01&rft.volume=26&rft.issue=7&rft.spage=1130&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/10.1016%2Fj.apgeochem.2011.04.003 L2 - http://www.sciencedirect.com/science/journal/08832927 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2011-01-01 N1 - Number of references - 40 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - acetates; biochemistry; dilution; esters; geochemistry; lanthanum; ligands; low temperature; metals; mobilization; models; organic compounds; phase equilibria; rare earths; solubility; temperature; thermodynamic properties DO - http://dx.doi.org/10.1016/j.apgeochem.2011.04.003 ER - TY - JOUR T1 - Uncovering Hidden Phylogenetic Consensus in Large Data Sets AN - 876240440; 15010695 AB - Many of the steps in phylogenetic reconstruction can be confounded by "rogue" taxa-taxa that cannot be placed with assurance anywhere within the tree, indeed, whose location within the tree varies with almost any choice of algorithm or parameters. Phylogenetic consensus methods, in particular, are known to suffer from this problem. In this paper, we provide a novel framework to define and identify rogue taxa. In this framework, we formulate a bicriterion optimization problem, the relative information criterion, that models the net increase in useful information present in the consensus tree when certain taxa are removed from the input data. We also provide an effective greedy heuristic to identify a subset of rogue taxa and use this heuristic in a series of experiments, with both pathological examples from the literature and a collection of large biological data sets. As the presence of rogue taxa in a set of bootstrap replicates can lead to deceivingly poor support values, we propose a procedure to recompute support values in light of the rogue taxa identified by our algorithm; applying this procedure to our biological data sets caused a large number of edges to move from "unsupported" to "supported" status, indicating that many existing phylogenies should be recomputed and reevaluated to reduce any inaccuracies introduced by rogue taxa. We also discuss the implementation issues encountered while integrating our algorithm into RAxML v7.2.7, particularly those dealing with scaling up the analyses. This integration enables practitioners to benefit from our algorithm in the analysis of very large data sets (up to 2,500 taxa and 10,000 trees, although we present the results of even larger analyses). JF - IEEE/ACM Transactions on Computational Biology and Bioinformatics AU - Pattengale, Nicholas AU - Aberer, Andre AU - Swenson, Krister AU - Stamatakis, Alexandros AU - Moret, Bernard AD - Sandia National Laboratories, Albuquerque Y1 - 2011/07// PY - 2011 DA - Jul 2011 SP - 902 EP - 911 PB - Institute of Electrical and Electronics Engineers, Inc., 3 Park Avenue, 17th Fl New York NY 10016-5997 USA VL - 8 IS - 4 SN - 1545-5963, 1545-5963 KW - Biotechnology and Bioengineering Abstracts KW - Phylogeny KW - Integration KW - Data processing KW - Algorithms KW - Problem solving KW - Bioinformatics KW - Computer applications KW - Scaling KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/876240440?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=IEEE%2FACM+Transactions+on+Computational+Biology+and+Bioinformatics&rft.atitle=Uncovering+Hidden+Phylogenetic+Consensus+in+Large+Data+Sets&rft.au=Pattengale%2C+Nicholas%3BAberer%2C+Andre%3BSwenson%2C+Krister%3BStamatakis%2C+Alexandros%3BMoret%2C+Bernard&rft.aulast=Pattengale&rft.aufirst=Nicholas&rft.date=2011-07-01&rft.volume=8&rft.issue=4&rft.spage=902&rft.isbn=&rft.btitle=&rft.title=IEEE%2FACM+Transactions+on+Computational+Biology+and+Bioinformatics&rft.issn=15455963&rft_id=info:doi/10.1109%2FTCBB.2011.28 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-07-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Phylogeny; Integration; Data processing; Algorithms; Problem solving; Bioinformatics; Computer applications; Scaling DO - http://dx.doi.org/10.1109/TCBB.2011.28 ER - TY - JOUR T1 - Human performance in control rooms of nuclear power plants: A survey study AN - 1017974924; 16706764 AB - Driven by the increasing demand for reliable and clean energy, the nuclear industry is booming worldwide three decades after the Three Mile Island accident. The transition of technology in nuclear power plants has raised many important human performance issues in every aspect of control systems. To obtain insights on how to meet the challenges imposed by new technologies, a survey was conducted to examine the causal factors of the human-system interface-related human errors in NPP plant control rooms. The survey results can help us identify error categories in terms of the interrelationships among the error causal factors. Moreover, an investigation of the error causal factors can enable us to better understand the nature of the errors and then propose effective corrective action guidelines to mitigate their consequences and enhance human reliability. A five-factor structure was identified through an exploratory factor analysis: Invisibility of System Status, Incorrect System Interface Design, Insufficient Support for System Diagnosis and Decision Making, Misoperations, and Manual Actions. The five factors are discussed in the context of the decision-action model developed in this study to derive corrective actions for each type of potential human error. ? 2011 Wiley Periodicals, Inc. JF - Human Factors and Ergonomics in Manufacturing AU - Liao, Huafei AU - Chang, Jo-Ling AD - Sandia National Laboratories, Albuquerque, New Mexico, hnliao@sandia.gov Y1 - 2011/07// PY - 2011 DA - Jul 2011 SP - 412 EP - 428 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 USA, [mailto:info@wiley.com], [URL:http://www.wiley.com/WileyCDA/Brand/id-35.html] VL - 21 IS - 4 SN - 1090-8471, 1090-8471 KW - Risk Abstracts; Health & Safety Science Abstracts KW - Accidents KW - Control systems KW - Ergonomics KW - Human factors KW - Nuclear energy KW - Nuclear power plants KW - Technology KW - guidelines KW - H 6000:Natural Disasters/Civil Defense/Emergency Management KW - R2 23020:Technological risks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1017974924?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Human+Factors+and+Ergonomics+in+Manufacturing&rft.atitle=Human+performance+in+control+rooms+of+nuclear+power+plants%3A+A+survey+study&rft.au=Liao%2C+Huafei%3BChang%2C+Jo-Ling&rft.aulast=Liao&rft.aufirst=Huafei&rft.date=2011-07-01&rft.volume=21&rft.issue=4&rft.spage=412&rft.isbn=&rft.btitle=&rft.title=Human+Factors+and+Ergonomics+in+Manufacturing&rft.issn=10908471&rft_id=info:doi/10.1002%2Fhfm.20260 L2 - http://onlinelibrary.wiley.com/doi/10.1002/hfm.20260/abstract LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-05-01 N1 - Last updated - 2013-01-11 N1 - SubjectsTermNotLitGenreText - Nuclear power plants; Accidents; guidelines; Control systems; Nuclear energy; Human factors; Ergonomics; Technology DO - http://dx.doi.org/10.1002/hfm.20260 ER - TY - JOUR T1 - Fluxes across double-diffusive interfaces: a one-dimensional-turbulence study AN - 902359457; 15768722 AB - This work is a parametric study of the fluxes of heat and salt across unsheared and sheared double-diffusive interfaces using one-dimensional-turbulence (ODT) simulations. It is motivated by the need to understand how these fluxes scale with parameters related to the fluid molecular properties and background shear. Comparisons are made throughout with previous models and available measurements. In unsheared interfaces, ODT simulations show that the dimensionless heat flux Nu scales with the stability parameter R rho , Rayleigh number Ra and Prandtl number Pr as Nu ~ (Ra/R rho )0.37+/-0.03 when Pr varies from 3 to 100 and as Nu ~ (Ra/R rho )0.31Pr0.22+/-0.04 when Pr varies from 0.01 to 1. Here Ra/R rho can be seen as the ratio of destabilizing and stabilizing effects. The simulation results also indicate that the ratio of salt and heat fluxes Rf is independent of Pr, scales with the Lewis number Le as Rf ~ Le0.41+/-0.04 when R rho is large enough and deviates from this expression for low values of R rho , when the interface becomes heavily eroded. In sheared interfaces, the simulations show three flow regimes. When the Richardson number Ri 1, shear-induced mixing dominates, the heat flux scales with the horizontal velocity difference across the interface and Rf = R rho . Near Ri ~ 1 the heat and salt fluxes are seen to increase abruptly as the shear increases. The flow structure and scaling of the fluxes are similar to those of unsheared interfaces when Ri 1. JF - Journal of Fluid Mechanics AU - Gonzalez-Juez, Esteban AU - Kerstein, Alan R AU - Lignell, David O AD - Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551-0969, USA, arkerst@sandia.gov arkerst@sandia.gov Y1 - 2011/06/25/ PY - 2011 DA - 2011 Jun 25 SP - 218 EP - 254 PB - Cambridge University Press, The Edinburgh Building, Cambridge CB2 2RU United Kingdom VL - 677 SN - 0022-1120, 0022-1120 KW - Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Shear KW - Heat flux KW - Interfaces KW - Velocity KW - Flow structures KW - Prandtl number KW - Mixing KW - Stabilizing KW - Fluid Mechanics KW - Model Studies KW - Heat transfer KW - Fluid mechanics KW - Salts KW - Rayleigh number KW - Numerical simulations KW - Heat KW - Richardson number KW - Fluctuations KW - Richardson's number KW - SW 6050:Rock mechanics and geology KW - M2 551.5:General (551.5) KW - Q2 09265:Sedimentary structures and stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/902359457?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Fluid+Mechanics&rft.atitle=Fluxes+across+double-diffusive+interfaces%3A+a+one-dimensional-turbulence+study&rft.au=Gonzalez-Juez%2C+Esteban%3BKerstein%2C+Alan+R%3BLignell%2C+David+O&rft.aulast=Gonzalez-Juez&rft.aufirst=Esteban&rft.date=2011-06-25&rft.volume=677&rft.issue=&rft.spage=218&rft.isbn=&rft.btitle=&rft.title=Journal+of+Fluid+Mechanics&rft.issn=00221120&rft_id=info:doi/10.1017%2Fjfm.2011.78 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-11-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Fluid mechanics; Prandtl number; Flow structures; Richardson number; Stabilizing; Heat transfer; Rayleigh number; Heat flux; Numerical simulations; Richardson's number; Shear; Salts; Heat; Interfaces; Velocity; Mixing; Fluctuations; Fluid Mechanics; Model Studies DO - http://dx.doi.org/10.1017/jfm.2011.78 ER - TY - JOUR T1 - Bioinformatic processing to identify single nucleotide polymorphism that potentially affect Ape1 function AN - 899144901; 15160934 AB - Inactivation of DNA damage response mechanisms is associated with several disease syndromes, including cancer, aging and neurodegeneration. A major corrective pathway for alkylation or oxidative DNA damage is base excision repair (BER). As part of an effort to identify variation in DNA repair genes, we used the expressed sequence tag (EST) database to identify amino acid variation in Ape1, an essential gene in the BER repair pathway. Nucleotide substitutions were considered valid only if the amino acid changes were observed in at least two independent EST sequencing runs (i.e. two independent EST reports). In total eighty amino acid variants were identified for the Ape1 gene. Using software tools SIFT and PolyPhen, which predict impacts of amino acid substitutions on protein structure and function, twenty-six variants were predicted by both algorithms to be deleterious to protein function. Majority of these intolerant mutations such as V206C and F240S, lie within the core of the protein and may affect the stability and folding of Ape1, or in the case of N212H, N212K, and Y171N, are close to the enzyme's active site and could drastically affect its function. A few of the intolerant mutations, i.e., G178V and E217R, are surface residues and are far from the active site, and as such, the predicted effect on Ape1 stability or function is not evident. These variants are reagents for further protein function studies and molecular epidemiology studies of cancer susceptibility. JF - Mutation Research/Genetic Toxicology and Environmental Mutagenesis AU - Yu, Eizadora T AU - Hadi, Masood Z AD - Biosystems Research Department, Sandia National Laboratories, Livermore, CA 94551-0969, USA, mzhadi@sandia.gov Y1 - 2011/06/17/ PY - 2011 DA - 2011 Jun 17 SP - 140 EP - 146 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 722 IS - 2 SN - 1383-5718, 1383-5718 KW - Biochemistry Abstracts 2: Nucleic Acids; Genetics Abstracts; Toxicology Abstracts KW - Amino acid substitution KW - Nucleotide sequence KW - Aging KW - Algorithms KW - DNA repair KW - expressed sequence tags KW - Neurodegeneration KW - Cancer KW - Alkylation KW - Mutagenesis KW - Protein structure KW - Computer programs KW - DNA damage KW - Databases KW - software KW - Epidemiology KW - Protein folding KW - Single-nucleotide polymorphism KW - Base excision repair KW - Bioinformatics KW - Mutation KW - Amino acid sequence KW - N 14820:DNA Metabolism & Structure KW - G 07710:Chemical Mutagenesis & Radiation KW - X 24490:Other UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/899144901?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxicologyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mutation+Research%2FGenetic+Toxicology+and+Environmental+Mutagenesis&rft.atitle=Bioinformatic+processing+to+identify+single+nucleotide+polymorphism+that+potentially+affect+Ape1+function&rft.au=Yu%2C+Eizadora+T%3BHadi%2C+Masood+Z&rft.aulast=Yu&rft.aufirst=Eizadora&rft.date=2011-06-17&rft.volume=722&rft.issue=2&rft.spage=140&rft.isbn=&rft.btitle=&rft.title=Mutation+Research%2FGenetic+Toxicology+and+Environmental+Mutagenesis&rft.issn=13835718&rft_id=info:doi/10.1016%2Fj.mrgentox.2010.06.015 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-10-01 N1 - Last updated - 2012-03-29 N1 - SubjectsTermNotLitGenreText - Amino acid substitution; Nucleotide sequence; Aging; Algorithms; DNA repair; Neurodegeneration; expressed sequence tags; Cancer; Mutagenesis; Alkylation; Protein structure; Databases; DNA damage; Computer programs; software; Protein folding; Epidemiology; Single-nucleotide polymorphism; Base excision repair; Bioinformatics; Mutation; Amino acid sequence DO - http://dx.doi.org/10.1016/j.mrgentox.2010.06.015 ER - TY - CPAPER T1 - DHS Overview of Critical Spares Project, "Cyber Security Triage" T2 - 130th Annual Conference and Exposition of the American Water Works Association (ACE 11) AN - 1313013484; 6065008 JF - 130th Annual Conference and Exposition of the American Water Works Association (ACE 11) AU - Dawson, Lon Y1 - 2011/06/12/ PY - 2011 DA - 2011 Jun 12 KW - Security KW - Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313013484?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=130th+Annual+Conference+and+Exposition+of+the+American+Water+Works+Association+%28ACE+11%29&rft.atitle=DHS+Overview+of+Critical+Spares+Project%2C+%22Cyber+Security+Triage%22&rft.au=Dawson%2C+Lon&rft.aulast=Dawson&rft.aufirst=Lon&rft.date=2011-06-12&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=130th+Annual+Conference+and+Exposition+of+the+American+Water+Works+Association+%28ACE+11%29&rft.issn=&rft_id=info:doi/ L2 - http://apps.awwa.org/ebusmain/default.aspx?tabid=265&viewer=dates&meetingid=A11 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Delaminated titanate and peroxotitanate photocatalysts AN - 1777145789; 14947941 AB - Delaminated layered titanates are effective, versatile, robust and practical photocatalytic materials for degradation of organic and microbiological contaminants. In prior studies, these have generally been obtained from Cs-titanate lepidocrocite-analogue parent materials. In this study we show that delaminated sodium nonatitanate (SNT) is equally effective as the delaminated Cs-titanate; yet it is cheaper to synthesize and is obtained in about one-third as many processing steps. Two chemical modifications; ligation with peroxide and treatment with phosphate resulted in improved photodegradation of common dyes; bromophenol-blue and methyl-orange. Together these two dyes provided experimental conditions ranging from pH [inline image]4.5-9. All layered titanate materials proved to be more effective colloidal suspension photocatalysts than standard TiO sub(2). Although most common characterization techniques could not distinguish significant differences between the different delaminated titanates (from different parent materials, with chemical modifications), band-gap measurement via UV-vis spectroscopy proved informative. Generally the closer the match between the band-gap and the UV-light source, the more effective the catalyst. Finally, these layered titanates were electrostatically adhered to a surface, and photocatalytic activity was retained in this form. Furthermore, in this surface-adsorbed form we could see clear morphological differences between the Cs-titanate and SNT derived materials, as well as measure the height of the adsorbed layers. All observations by Atomic Force Microscopy indicated that the titanates layers that adhere to mica have a thickness of 1-10 layers thick (1-4 nm). These materials in their surface-fixed forms are very promising for water treatment technologies. AB: JF - Applied Catalysis B: Environmental AU - Stewart, Tom A AU - Nyman, May AU - DeBoer, Maarten P AD - Sandia National Laboratories, Albuquerque, NM 87185-0754, United States Y1 - 2011/06/09/ PY - 2011 DA - 2011 Jun 09 SP - 69 EP - 76 PB - Elsevier Science, P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 105 IS - 1-2 SN - 0926-3373, 0926-3373 KW - Solid State and Superconductivity Abstracts (SO); METADEX (MD); Advanced Polymers Abstracts (EP); Environmental Engineering Abstracts (EN); Composites Industry Abstracts (ED); Engineered Materials Abstracts, Ceramics (EC); CSA / ASCE Civil Engineering Abstracts (CE) KW - Photocatalysis KW - Layered-titanates KW - Peroxide KW - Sodium nonatitanate KW - Cs-titanate lepidocrocite KW - Titanium dioxide KW - Dyes KW - Delaminating KW - Microorganisms KW - Parents KW - Photocatalysts KW - Titanates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777145789?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Catalysis+B%3A+Environmental&rft.atitle=Delaminated+titanate+and+peroxotitanate+photocatalysts&rft.au=Stewart%2C+Tom+A%3BNyman%2C+May%3BDeBoer%2C+Maarten+P&rft.aulast=Stewart&rft.aufirst=Tom&rft.date=2011-06-09&rft.volume=105&rft.issue=1-2&rft.spage=69&rft.isbn=&rft.btitle=&rft.title=Applied+Catalysis+B%3A+Environmental&rft.issn=09263373&rft_id=info:doi/10.1016%2Fj.apcatb.2011.03.036 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-09-01 N1 - Last updated - 2016-05-18 DO - http://dx.doi.org/10.1016/j.apcatb.2011.03.036 ER - TY - JOUR T1 - A coupled fluid-solid model for problems in geomechanics; application to sand production AN - 894810644; 2011-082852 AB - Some of the most challenging problems in geomechanics involve the coupling between fluid flow and solid deformation. In this paper we briefly present an overview of existing coupling methods to problems involving fluid flow and deformation and describe testing of a new discrete-based coupling method for problems in porous media. Modeled permeability and porosity distributions are compared to idealized packed assemblies and results are presented for simulations of steady flow through porous media. Previously published results for the coupled model focused on few or multiple particles in a fluid, whereas our results show good agreement to packed assemblies of particles (i.e. porous media). Finally, the two-dimensional model is applied to sand production, a common problem in geomechanics. Sand production is defined as the co-production of both a fluid and solid phase in oil and gas wells. In our models, we capture initial sand production associated with early-time drawdown. Later-time results show episodic sanding rates associated with formation stability and instabilities. Both observations are qualitatively consistent with laboratory and field observations. We find that high confining pressure inhibits the production of sand, through elevated interparticle contact forces. It is argued that these physically based models have a use in testing and evaluating competing hypotheses of sand production but their applicability is currently limited to small spatial and temporal scales. We believe these models bridge an important gap between the underlying physics of micro-mechanical interactions of fluid and solid grains and the continuum descriptions of those systems. Abstract Copyright (2010), John Wiley & Sons, Ltd. JF - International Journal for Numerical and Analytical Methods in Geomechanics AU - Boutt, D F AU - Cook, B K AU - Williams, J R Y1 - 2011/06// PY - 2011 DA - June 2011 SP - 997 EP - 1018 PB - Wiley, Chichester VL - 35 IS - 9 SN - 0363-9061, 0363-9061 KW - soil mechanics KW - sand KW - discrete element analysis KW - three-dimensional models KW - clastic sediments KW - Darcy's law KW - stress KW - sandstone KW - coupling KW - porous materials KW - mechanical properties KW - fluid dynamics KW - porosity KW - sedimentary rocks KW - sediments KW - constitutive equations KW - clastic rocks KW - permeability KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/894810644?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+for+Numerical+and+Analytical+Methods+in+Geomechanics&rft.atitle=A+coupled+fluid-solid+model+for+problems+in+geomechanics%3B+application+to+sand+production&rft.au=Boutt%2C+D+F%3BCook%2C+B+K%3BWilliams%2C+J+R&rft.aulast=Boutt&rft.aufirst=D&rft.date=2011-06-01&rft.volume=35&rft.issue=9&rft.spage=997&rft.isbn=&rft.btitle=&rft.title=International+Journal+for+Numerical+and+Analytical+Methods+in+Geomechanics&rft.issn=03639061&rft_id=info:doi/10.1002%2Fnag.938 L2 - http://www3.interscience.wiley.com/journal/3312/home LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2011-01-01 N1 - Number of references - 60 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - clastic rocks; clastic sediments; constitutive equations; coupling; Darcy's law; discrete element analysis; fluid dynamics; mechanical properties; permeability; porosity; porous materials; sand; sandstone; sedimentary rocks; sediments; soil mechanics; stress; three-dimensional models DO - http://dx.doi.org/10.1002/nag.938 ER - TY - JOUR T1 - Truncated multiGaussian fields and effective conductance of binary media AN - 876226035; 14882664 AB - Research highlightsao Excursion sets of truncated multiGaussian fields extend distance-based upscaling. ao Accurate results at all proportions of high K material. ao Full-width at half maximum (FWHM) models distance between inclusions. ao Percolation behavior impacts effective values at high conductivity contrasts. Truncated Gaussian fields provide a flexible model for defining binary media with dispersed (as opposed to layered) inclusions. General properties of excursion sets on these truncated fields are coupled with a distance-based upscaling algorithm and approximations of point process theory to develop an estimation approach for effective conductivity in two-dimensions. Estimation of effective conductivity is derived directly from knowledge of the kernel size used to create the multiGaussian field, defined as the full-width at half maximum (FWHM), the truncation threshold and conductance values of the two modes. Therefore, instantiation of the multiGaussian field is not necessary for estimation of the effective conductance. The critical component of the effective medium approximation developed here is the mean distance between high conductivity inclusions. This mean distance is characterized as a function of the FWHM, the truncation threshold and the ratio of the two modal conductivities. Sensitivity of the resulting effective conductivity to this mean distance is examined for two levels of contrast in the modal conductances and different FWHM sizes. Results demonstrate that the FWHM is a robust measure of mean travel distance in the background medium. The resulting effective conductivities are accurate when compared to numerical results and results obtained from effective media theory, distance-based upscaling and numerical simulation. JF - Advances in Water Resources AU - McKenna, Sean A AU - Ray, Jaideep AU - Marzouk, Youssef AU - van Bloemen Waanders, Bart AD - Sandia National Laboratories, Geoscience Research and Applications Group, P.O. Box 5800 MS 0751, Albuquerque, NM 87185-0751, USA, samcken@sandia.gov Y1 - 2011/05// PY - 2011 DA - May 2011 SP - 617 EP - 626 PB - Elsevier Science, The Boulevard Kidlington Oxford OX5 1GB UK VL - 34 IS - 5 SN - 0309-1708, 0309-1708 KW - Environment Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Meteorological & Geoastrophysical Abstracts KW - Sensitivity KW - Mathematical models KW - Conductance KW - Conductivity KW - Algorithms KW - Simulation KW - Water resources KW - Model Studies KW - Percolation KW - Behavior KW - Numerical simulations KW - AQ 00001:Water Resources and Supplies KW - ENA 06:Food & Drugs KW - Q2 09403:Chemicals from sea water KW - SW 0810:General KW - M2 551.579.1:Water supply from precipitation (551.579.1) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/876226035?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=Truncated+multiGaussian+fields+and+effective+conductance+of+binary+media&rft.au=McKenna%2C+Sean+A%3BRay%2C+Jaideep%3BMarzouk%2C+Youssef%3Bvan+Bloemen+Waanders%2C+Bart&rft.aulast=McKenna&rft.aufirst=Sean&rft.date=2011-05-01&rft.volume=34&rft.issue=5&rft.spage=617&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/10.1016%2Fj.advwatres.2011.02.011 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-07-01 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Percolation; Mathematical models; Water resources; Numerical simulations; Algorithms; Sensitivity; Simulation; Behavior; Conductance; Conductivity; Model Studies DO - http://dx.doi.org/10.1016/j.advwatres.2011.02.011 ER - TY - JOUR T1 - Thermocouple Response in Fires, Part 2: Validation of Virtual Thermocouple Model for Fire Codes AN - 876225145; 14876741 AB - A virtual thermocouple model for high fidelity multiphysics computer simulation is introduced in this article. Detailed thermocouple and gas temperature (Coherent Anti-Stokes Raman Scattering) measurements were performed using a well-controlled, adiabatic, flat-flame Hencken burner, which provided data for validating the thermocouple model in a Sandia National Laboratories fire code. Comparison of simulation results to test data indicated a mean error of 6% between the thermocouple reading and predicted temperature. JF - Journal of Fire Sciences AU - Brundage, Aaron L AU - Burl Donaldson, A AU - Gill, Walt AU - Kearney, Sean P AU - Nicolette, Vern F AU - Yilmaz, Nadir AD - Fire Sciences and Technologies, Sandia National Laboratories, Albuquerque, NM 87123, USA, yilmaznadir@yahoo.com Y1 - 2011/05// PY - 2011 DA - May 2011 SP - 213 EP - 226 PB - Sage Publications Ltd., 6 Bonhill St. London EC2A 4PU UK VL - 29 IS - 3 SN - 0734-9041, 0734-9041 KW - Health & Safety Science Abstracts KW - virtual thermocouple model KW - thermocouple heat balance KW - fire code development KW - fire temperature measurements. KW - Fires KW - building codes KW - Temperature KW - Simulation KW - H 7000:Fire Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/876225145?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Fire+Sciences&rft.atitle=Thermocouple+Response+in+Fires%2C+Part+2%3A+Validation+of+Virtual+Thermocouple+Model+for+Fire+Codes&rft.au=Brundage%2C+Aaron+L%3BBurl+Donaldson%2C+A%3BGill%2C+Walt%3BKearney%2C+Sean+P%3BNicolette%2C+Vern+F%3BYilmaz%2C+Nadir&rft.aulast=Brundage&rft.aufirst=Aaron&rft.date=2011-05-01&rft.volume=29&rft.issue=3&rft.spage=213&rft.isbn=&rft.btitle=&rft.title=Journal+of+Fire+Sciences&rft.issn=07349041&rft_id=info:doi/10.1177%2F0734904110386188 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-07-01 N1 - Number of references - 16 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Fires; building codes; Temperature; Simulation DO - http://dx.doi.org/10.1177/0734904110386188 ER - TY - JOUR T1 - Thermocouple Response in Fires, Part 1: Considerations in Flame Temperature Measurements by a Thermocouple AN - 876225132; 14876740 AB - This PIRT exercise identifies a number of factors which can influence thermocouple readings made in fires. Identified factors are: (a) the fuel/oxidizer equivalence ratio and its effect on readings, (b) the influence of the state of oxidation and variation with time for the thermocouple sheath, (c) the convection coefficient models and how experimental readings are influenced by thermocouple diameter and yaw angle, (d) response time of a MIMS thermocouple, and (e) thermocouple end effects. JF - Journal of Fire Sciences AU - Brundage, Aaron L AU - Burl Donaldson, A AU - Gill, Walt AU - Kearney, Sean P AU - Nicolette, Vern F AU - Yilmaz, Nadir AD - Fire Sciences and Technologies, Sandia National Laboratories, Albuquerque, NM 87123, USA, yilmaznadir@yahoo.com Y1 - 2011/05// PY - 2011 DA - May 2011 SP - 195 EP - 211 PB - Sage Publications Ltd., 6 Bonhill St. London EC2A 4PU UK VL - 29 IS - 3 SN - 0734-9041, 0734-9041 KW - Health & Safety Science Abstracts KW - thermocouple response KW - temperature measurement KW - fire modeling. KW - Fires KW - Fuels KW - Oxidation KW - convection KW - H 7000:Fire Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/876225132?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Fire+Sciences&rft.atitle=Thermocouple+Response+in+Fires%2C+Part+1%3A+Considerations+in+Flame+Temperature+Measurements+by+a+Thermocouple&rft.au=Brundage%2C+Aaron+L%3BBurl+Donaldson%2C+A%3BGill%2C+Walt%3BKearney%2C+Sean+P%3BNicolette%2C+Vern+F%3BYilmaz%2C+Nadir&rft.aulast=Brundage&rft.aufirst=Aaron&rft.date=2011-05-01&rft.volume=29&rft.issue=3&rft.spage=195&rft.isbn=&rft.btitle=&rft.title=Journal+of+Fire+Sciences&rft.issn=07349041&rft_id=info:doi/10.1177%2F0734904110386187 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-07-01 N1 - Number of references - 13 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Fires; Fuels; Oxidation; temperature measurement; convection DO - http://dx.doi.org/10.1177/0734904110386187 ER - TY - JOUR T1 - Experimental determination of solubility constant of hydromagnesite (5424) in NaCl solutions up to 4.4 m at room temperature AN - 875015300; 2011-054892 AB - This study reports the solubility constants of both synthetic and natural hydromagnesite (5424) determined in NaCl solutions with a wide range of ionic strength regarding the following reaction: Mg (sub 5) (CO (sub 3) ) (sub 4) (OH) (sub 2) X4H (sub 2) O(cr) + 10H+) 5Mg (super 2+) + 4CO (sub 21(g)+10H (sub 2) O(l). Solubility experiments were conducted from undersaturation in deionized water and 0.10-4.4 m NaCl solutions at P (sub CO2) of 10 (super -3.4) atm and 22.5 degrees C, and lasting up to 1870 days. Based on the specific interaction theory, the weighted average solubility constant at infinite dilution calculated from the experimental results in 0.10-3.2m NaCl solutions using the natural hydromagnesite (5424) from Staten Island, New York, is 58.39+ or -0.40 (2sigma ) in logarithmic units at 22.5 degrees C with a corresponding value of 57.93+ or -0.40 (2sigma ) at 25 degrees C. Similarly, the weighted average solubility constant using the natural hydromagnesite (5424) from Gabbs, Nevada, is 59.54+ or -0.72 (2sigma ) in logarithmic units at 22.5 degrees C with a corresponding value of 59.07+ or -0.72 (2sigma ) at 25 degrees C. The weighted average solubility constant of synthetic hydromagnesite (5424) determined from experiments in 0.10-4.4 m NaCl solutions is 61.53+ or -0.59 (2sigma ) in logarithmic units at 22.5 degrees C with a corresponding value of 61.04+ or -0.59 (2sigma ) at 25 degrees C. The natural hydromagnesite has lower solubilities because of its higher crystallinity related to their origins than synthetic hydromagnesite. The solubility constant of synthetic hydromagnesite is about one order of magnitude lower than the literature values. The Gibbs free energies of formation at the reference state (25 degrees C, 1 bar) are -5896+ or -2 kJ mol (super -1) , -5889+ or -4 kJ mol (super -1) , and -5,878+ or -3 kJ mol (super -1) for the natural hydromagnesite from Staten Island, New York, from Gabbs, Nevada, and for the synthetic hydromagnesite, respectively. JF - Chemical Geology AU - Xiong, Yongliang Y1 - 2011/05// PY - 2011 DA - May 2011 SP - 262 EP - 269 PB - Elsevier, Amsterdam VL - 284 IS - 3-4 SN - 0009-2541, 0009-2541 KW - hazardous waste KW - sodium chloride KW - experimental studies KW - hydromagnesite KW - pollution KW - free energy KW - aqueous solutions KW - solubility KW - temperature KW - radioactive waste KW - environmental management KW - waste disposal KW - crystal chemistry KW - geochemistry KW - carbonates KW - synthetic materials KW - 01C:Mineralogy of non-silicates KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/875015300?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Experimental+determination+of+solubility+constant+of+hydromagnesite+%285424%29+in+NaCl+solutions+up+to+4.4+m+at+room+temperature&rft.au=Xiong%2C+Yongliang&rft.aulast=Xiong&rft.aufirst=Yongliang&rft.date=2011-05-01&rft.volume=284&rft.issue=3-4&rft.spage=262&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2011.03.005 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2011-01-01 N1 - Number of references - 42 N1 - Document feature - illus. incl. 6 tables N1 - Last updated - 2012-06-07 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - aqueous solutions; carbonates; crystal chemistry; environmental management; experimental studies; free energy; geochemistry; hazardous waste; hydromagnesite; pollution; radioactive waste; sodium chloride; solubility; synthetic materials; temperature; waste disposal DO - http://dx.doi.org/10.1016/j.chemgeo.2011.03.005 ER - TY - JOUR T1 - Minimize Impact or Maximize Benefit: The Role of Objective Function in Approximately Optimizing Sensor Placement for Municipal Water Distribution Networks AN - 1285085127; 15357005 AB - We consider the design of a sensor network to serve as an early warning system against a potential suite of contamination incidents. Given any measure for evaluating the quality of a sensor placement, there are two ways to model the objective. One is to minimize the impact or damage to the network, the other is to maximize the reduction in impact compared to the network without sensors. These objectives are the same when the problem is solved optimally. But when given equally-good approximation algorithms for each of this pair of complementary objectives, either one might be a better choice. The choice generally depends upon the quality of the approximation algorithms, the impact when there are no sensors, and the number of sensors available. We examine when each objective is better than the other by examining multiple real world networks. When assuming perfect sensors, minimizing impact is frequently superior for virulent contaminants. But when there are long response delays, or it is very difficult to reduce impact, maximizing impact reduction may be better. JF - Reston, VA: ASCE Proceedings of the 2011 World Environmental and Water Resources Congress; May 22.26, 2011, Palm Springs, California, d 20110000 AU - Hart, William E AU - Murray, Regan AU - Phillips, Cynthia A AD - Sandia National Laboratories, Albuquerque, New Mexico, USA. Y1 - 2011/05// PY - 2011 DA - May 2011 SP - 330 EP - 339 PB - American Society of Civil Engineers KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality KW - Optimization KW - Municipal water KW - Water distribution systems KW - Pollution detection KW - Sensors KW - Contamination KW - Objective Function KW - Algorithms KW - Water resources KW - Warning systems KW - Pollutants KW - Municipal Water KW - Networks KW - Warning Systems KW - Q5 08503:Characteristics, behavior and fate KW - SW 5010:Network design KW - AQ 00006:Sewage KW - Q2 09381:Cables UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1285085127?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Reston%2C+VA%3A+ASCE+Proceedings+of+the+2011+World+Environmental+and+Water+Resources+Congress%3B+May+22.26%2C+2011%2C+Palm+Springs%2C+California+%7Cd+20110000&rft.atitle=Minimize+Impact+or+Maximize+Benefit%3A+The+Role+of+Objective+Function+in+Approximately+Optimizing+Sensor+Placement+for+Municipal+Water+Distribution+Networks&rft.au=Hart%2C+William+E%3BMurray%2C+Regan%3BPhillips%2C+Cynthia+A&rft.aulast=Hart&rft.aufirst=William&rft.date=2011-05-01&rft.volume=&rft.issue=&rft.spage=330&rft.isbn=9780784411735&rft.btitle=&rft.title=Reston%2C+VA%3A+ASCE+Proceedings+of+the+2011+World+Environmental+and+Water+Resources+Congress%3B+May+22.26%2C+2011%2C+Palm+Springs%2C+California+%7Cd+20110000&rft.issn=&rft_id=info:doi/10.1061%2F41173%28414%2936 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Pollution detection; Contamination; Sensors; Water resources; Warning systems; Municipal Water; Pollutants; Objective Function; Algorithms; Networks; Warning Systems DO - http://dx.doi.org/10.1061/41173(414)36 ER - TY - CPAPER T1 - Integrated Energy-Water Planning for the U.S. T2 - 2011 American Water Resources Association Spring Specialty Conference (AWRA 2011) AN - 1313016549; 6065919 JF - 2011 American Water Resources Association Spring Specialty Conference (AWRA 2011) AU - Tidwell, Vincent AU - Malczynski, Len AU - Kobos, Peter AU - Klise, Geoff Y1 - 2011/04/18/ PY - 2011 DA - 2011 Apr 18 KW - USA KW - Ecology KW - Geography KW - Earth sciences KW - Water resources KW - Food UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313016549?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2011+American+Water+Resources+Association+Spring+Specialty+Conference+%28AWRA+2011%29&rft.atitle=Integrated+Energy-Water+Planning+for+the+U.S.&rft.au=Tidwell%2C+Vincent%3BMalczynski%2C+Len%3BKobos%2C+Peter%3BKlise%2C+Geoff&rft.aulast=Tidwell&rft.aufirst=Vincent&rft.date=2011-04-18&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2011+American+Water+Resources+Association+Spring+Specialty+Conference+%28AWRA+2011%29&rft.issn=&rft_id=info:doi/ L2 - http://www.awra.org/meetings/Baltimore2011/doc/Baltimore2011FinalProgram.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Lithographically defined 3D nanoporous nonenzymatic glucose sensors AN - 869835216; 14608941 AB - Nonenzymatic glucose oxidation is demonstrated on highly faceted palladium nanowflower-modified porous carbon electrodes fabricated by interference lithography. Varying electrodeposition parameters were used to control the final shape and morphology of the deposited nanoparticles on the 3D porous carbon which showed a 12 times increase in the electrochemically active surface area over analogous planar electrodes. Extremely fast amperometric glucose responses (achieving 95% of the steady state limiting current in less than 5s) with a linear range from 1 to 10mM and a detection limit of 10I14M were demonstrated. The unusual surface properties of the pyrolyzed photoresist films produced strongly adhered palladium crystal structures that were stable for hundreds of cycles towards glucose oxidation without noticeable current decay. JF - Biosensors and Bioelectronics AU - Xiao, Xiaoyin AU - Montano, Gabriel A AU - Edwards, Thayne L AU - Washburn, Cody M AU - Brozik, Susan M AU - Wheeler, David R AU - Burckel, DBruce AU - Polsky, Ronen AD - Department of Biosensors & Nanomaterials, Sandia National Laboratories, PO Box 5800, MS-0892 Albuquerque, NM 87185, USA, rpolsky@sandia.gov Y1 - 2011/04/15/ PY - 2011 DA - 2011 Apr 15 SP - 3641 EP - 3646 PB - Elsevier Advanced Technology, 660 White Plains Rd. Tarrytown NY 10591-5153 USA VL - 26 IS - 8 SN - 0956-5663, 0956-5663 KW - Biotechnology and Bioengineering Abstracts KW - Porous carbon KW - Interference lithography KW - Palladium nanoflowers KW - Glucose KW - Biosensors KW - palladium KW - Surface properties KW - Carbon KW - Surface area KW - Electrodes KW - Oxidation KW - Crystal structure KW - nanoparticles KW - Films KW - W 30955:Biosensors UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/869835216?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biosensors+and+Bioelectronics&rft.atitle=Lithographically+defined+3D+nanoporous+nonenzymatic+glucose+sensors&rft.au=Xiao%2C+Xiaoyin%3BMontano%2C+Gabriel+A%3BEdwards%2C+Thayne+L%3BWashburn%2C+Cody+M%3BBrozik%2C+Susan+M%3BWheeler%2C+David+R%3BBurckel%2C+DBruce%3BPolsky%2C+Ronen&rft.aulast=Xiao&rft.aufirst=Xiaoyin&rft.date=2011-04-15&rft.volume=26&rft.issue=8&rft.spage=3641&rft.isbn=&rft.btitle=&rft.title=Biosensors+and+Bioelectronics&rft.issn=09565663&rft_id=info:doi/10.1016%2Fj.bios.2011.02.020 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-03-01 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Biosensors; Surface properties; palladium; Carbon; Surface area; Oxidation; Electrodes; Crystal structure; Glucose; nanoparticles; Films DO - http://dx.doi.org/10.1016/j.bios.2011.02.020 ER -