FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU May, PW
Doyle, JD
Pullen, JD
David, LT
AF May, Paul W.
Doyle, James D.
Pullen, Julie D.
David, Laura T.
TI Two-Way Coupled Atmosphere-Ocean Modeling of the PhilEx Intensive
Observational Periods
SO OCEANOGRAPHY
LA English
DT Article
ID SOUTH CHINA SEA; DYNAMICS; TOPOGRAPHY; RADAR; WAKE
AB High-resolution coupled atmosphere-ocean simulations of the Philippines show the regional and local nature of atmospheric patterns and ocean response during Intensive Observational Period cruises in January-February 2008 (IOP-08) and February March 2009 (IOP-09) for the Philippine Straits Dynamics Experiment. Winds were stronger and more variable during IOP-08 because the time period covered was near the peak of the northeast monsoon season. Distinct wind jets between islands and wakes behind islands are common northeast monsoon features that are controlled by winds interacting with island topography: The modeled upper-ocean flow associated with Philippine straits during IOP-08 exhibits large (> 1 m s(-1)) westward mean flow through Suriago Strait and highly variable flow through Mindoro Strait. The model shows prominent eddies in the Bohol Sea and Cuyo East Pass that were also observed during the field experiment. A high-resolution nested simulation of the Verde Island Passage finds local wind-driven upwelling that is confirmed by shipboard sea surface temperature measurements and satellite observations of chlorophyll concentration.
C1 [May, Paul W.] Comp Sci Corp, Monterey, CA USA.
[Doyle, James D.] USN, Res Lab, Marine Meteorol Div, Mesoscale Modeling Sect, Monterey, CA USA.
[Pullen, Julie D.] Stevens Inst Technol, Maritime Secur Lab, Hoboken, NJ 07030 USA.
[David, Laura T.] Univ Philippines Diliman, Inst Marine Sci, Quezon City, Philippines.
RP May, PW (reprint author), Comp Sci Corp, Monterey, CA USA.
EM paul.may.ctr@nrlmry.navy.mil
FU Office of Naval Research (ONR) [0601153N, N00014-10-1-0300]; Earth
Institute, Columbia University
FX J. Doyle and P. May were supported by the Office of Naval Research (ONR)
program element 0601153N. Research support for J. Pullen was provided by
a Marie Tharp visiting fellowship at the Earth Institute, Columbia
University; Office of Naval Research (ONR) program element 0601153N; and
ONR grant N00014-10-1-0300. COAMPS is a registered trademark of the
Naval Research Laboratory.
NR 31
TC 11
Z9 11
U1 0
U2 2
PU OCEANOGRAPHY SOC
PI ROCKVILLE
PA P.O. BOX 1931, ROCKVILLE, MD USA
SN 1042-8275
J9 OCEANOGRAPHY
JI Oceanography
PD MAR
PY 2011
VL 24
IS 1
SI SI
BP 48
EP 57
PG 10
WC Oceanography
SC Oceanography
GA 733AY
UT WOS:000288234000005
ER
PT J
AU Pullen, JD
Gordon, AL
Sprintall, J
Lee, CM
Alford, MH
Doyle, JD
May, PW
AF Pullen, Julie D.
Gordon, Arnold L.
Sprintall, Janet
Lee, Craig M.
Alford, Matthew H.
Doyle, James D.
May, Paul W.
TI Atmospheric and Oceanic Processes in the Vicinity of an Island Strait
SO OCEANOGRAPHY
LA English
DT Article
ID WINTER MONSOON SURGES; GRAN-CANARIA; SOUTH CHINA; ARCHIPELAGO; FEATURES;
EDDIES
AB In early February 2008, the mean flow through the Philippines' Mindoro Strait reversed. The flow was southward through the strait during late January and northward during most of February. The flow reversal coincided with the period between two Intensive Observational Period cruises (IOP-08-1 and IOP-08-2) sponsored by the Office of Naval Research as part of the Philippine Straits Dynamics Experiment (PhilEx). Employing high-resolution oceanic and atmospheric models supplemented with in situ ocean and air measurements, we detail the regional and local conditions that influenced this flow reversal. High-resolution air-sea simulations captured the flow reversal and agreed with measured currents from two moorings in the vicinity of Mindoro Strait. A short (January 24-27) easterly monsoon surge and a longer (February 9-16) northerly surge were represented in the model as well as in QuikSCAT and underway wind data taken during IOP-08-2. Mesoscale oceanic dipole eddies off Mindoro and Luzon islands were formed/enhanced and subsequently detached during these wind events. The cyclonic eddy in the dipole pair associated with the easterly surge was opportunistically sampled during the IOP-08-1 cruise, and the modeled eddy characteristics were verified using in situ shipboard data. The predominant geostrophic southward flow through the strait was interrupted by a strong and sustained wind-driven (by the northerly surge) flow reversal in early February. Enhanced upper-ocean stratification in winter 2008 due to anomalously high precipitation served to isolate the observed near-surface flow.
C1 [Pullen, Julie D.] Stevens Inst Technol, Maritime Secur Lab, Hoboken, NJ 07030 USA.
[Gordon, Arnold L.] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA.
[Sprintall, Janet] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
[Lee, Craig M.; Alford, Matthew H.] Univ Washington, Appl Phys Lab, Seattle, WA 98105 USA.
[Doyle, James D.] USN, Res Lab, Marine Meteorol Div, Monterey, CA USA.
[May, Paul W.] Comp Sci Corp, Monterey, CA USA.
RP Pullen, JD (reprint author), Stevens Inst Technol, Maritime Secur Lab, Hoboken, NJ 07030 USA.
EM julie.pullen@stevens.edu
RI Gordon, Arnold/H-1049-2011
OI Gordon, Arnold/0000-0001-6480-6095
FU Office of Naval Research (ONR) [N00014-10-1-0300, N00014-09-1-0582,
N00014-06-1-0690]
FX We are grateful to Pierre Flament for valuable discussions. COAMPS is a
registered trademark of the Naval Research Laboratory The research
support for J. Pullen was provided by a Marie Tharp visiting fellowship
at the Earth Institute, Columbia University, as well as Office of Naval
Research (ONR) program element 0601153N and grant N00014-10-1-0300. A.L.
Gordon was funded by ONR grant N00014-09-1-0582 and this is
Lamont-Doherty Earth Observatory contribution number 7430. J. Sprintall
was funded by ONR grant N00014-06-1-0690. J. Doyle and P. May were
supported by the Office of Naval Research (ONR) program element
0601153N. Thanks to the crew of R/V Melville for their assistance.
NR 19
TC 10
Z9 10
U1 0
U2 3
PU OCEANOGRAPHY SOC
PI ROCKVILLE
PA P.O. BOX 1931, ROCKVILLE, MD USA
SN 1042-8275
J9 OCEANOGRAPHY
JI Oceanography
PD MAR
PY 2011
VL 24
IS 1
SI SI
BP 112
EP 121
PG 10
WC Oceanography
SC Oceanography
GA 733AY
UT WOS:000288234000010
ER
PT J
AU Sanghera, J
Kim, W
Baker, C
Villalobos, G
Frantz, J
Shaw, B
Lutz, A
Sadowski, B
Miklos, R
Hunt, M
Kung, F
Aggarwal, I
AF Sanghera, Jasbinder
Kim, Woohong
Baker, Colin
Villalobos, Guillermo
Frantz, Jesse
Shaw, Brandon
Lutz, Austin
Sadowski, Bryan
Miklos, Robert
Hunt, Michael
Kung, Frederic
Aggarwal, Ishwar
TI Laser oscillation in hot pressed 10% Yb3+:Lu2O3 ceramic
SO OPTICAL MATERIALS
LA English
DT Article; Proceedings Paper
CT 5th Laser Ceramics Symposium - International Symposium on Transparent
Ceramics for Photonics Applications
CY DEC 09-11, 2009
CL Bilbao, SPAIN
DE Lutetia ceramic; Ytterbium doping; Polycrystalline; Oxides; Laser
materials
ID SOLID-STATE LASERS; YB-LU2O3; LU2O3
AB We report the first demonstration of laser oscillation at 1081 nm using a 10% Yb3+ doped Lu2O3 ceramic made by hot pressing of high purity co-precipitated powder. Approximately 2.5 W of output power was obtained with an optical-to-optical efficiency of similar to 10%. This represents the highest output power obtained and the highest concentration of Yb3+ used thus far in a Yb3+ doped Lu2O3 ceramic. Published by Elsevier B.V.
C1 [Sanghera, Jasbinder; Kim, Woohong; Baker, Colin; Villalobos, Guillermo; Frantz, Jesse; Shaw, Brandon; Lutz, Austin; Aggarwal, Ishwar] USN, Res Lab, Washington, DC 20375 USA.
[Sadowski, Bryan; Miklos, Robert] Global Strategies Grp, Crofton, MD 21114 USA.
[Hunt, Michael; Kung, Frederic] Univ Res Fdn, Greenbelt, MD 20770 USA.
RP Sanghera, J (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM jasbinder.sanghera@nrl.navy.mil
RI Baker, Colin/I-6657-2015
NR 14
TC 26
Z9 26
U1 0
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0925-3467
J9 OPT MATER
JI Opt. Mater.
PD MAR
PY 2011
VL 33
IS 5
SI SI
BP 670
EP 674
DI 10.1016/j.optmat.2010.09.012
PG 5
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA 737OQ
UT WOS:000288578500003
ER
PT J
AU Lyckegaard, A
Lauridsen, EM
Ludwig, W
Fonda, RW
Poulsen, HF
AF Lyckegaard, Allan
Lauridsen, Erik Mejdal
Ludwig, Wolfgang
Fonda, Richard Warren
Poulsen, Henning Friis
TI On the Use of Laguerre Tessellations for Representations of 3D Grain
Structures
SO ADVANCED ENGINEERING MATERIALS
LA English
DT Article; Proceedings Paper
CT 2nd Conference on 3D-Imaging of Materials and Systems (3D-IMS2010)
CY SEP 06-10, 2010
CL Hourtin, FRANCE
ID GROWTH; DIMENSIONS
AB Accurate descriptions of 3D grain structures in polycrystalline materials are of key interest as the grain structure is closely correlated to the macroscopic properties of the material. In the present study, we investigate the accuracy of using Laguerre tessellations to represent 3D grain structures from only the spatial center of mass location and the volume of the grains. The ability of Laguerre tessellations to describe accurate grain shapes and topologies of real 3D grain structures are revealed by direct comparison to 3D reconstructions of an un-deformed meta-stable beta -titanium alloy obtained by phase-contrast micro-tomography. This study reveals that (volume weighted) Laguerre tessellations are superior to classical Voronoi tessellations when it comes to providing accurate representations of real 3D grain structures. Furthermore, although the Laguerre tessellations were only able to correctly describe the local arrangements of grains (i.e., the grain neighbors and number of grain facets) for 31.8% of the investigated grains, the Laguerre tessellations were able to accurately describe statistical grain characteristics such as grain size distributions and grain neighbor distributions.
C1 [Lyckegaard, Allan; Lauridsen, Erik Mejdal; Poulsen, Henning Friis] Riso DTU, Ctr Fundamental Res Met Struct 4D, DK-4000 Roskilde, Denmark.
[Ludwig, Wolfgang] European Synchrotron Radiat Facil, F-38043 Grenoble 9, France.
[Fonda, Richard Warren] USN, Res Lab, Washington, DC 20375 USA.
RP Lyckegaard, A (reprint author), Riso DTU, Ctr Fundamental Res Met Struct 4D, Frederiksborgvej 399, DK-4000 Roskilde, Denmark.
EM ally@risoe.dtu.dk
RI Poulsen, Henning/A-4131-2012;
OI Lauridsen, Erik/0000-0002-4923-8373
NR 12
TC 21
Z9 22
U1 1
U2 18
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1438-1656
J9 ADV ENG MATER
JI Adv. Eng. Mater.
PD MAR
PY 2011
VL 13
IS 3
SI SI
BP 165
EP 170
DI 10.1002/adem.201000258
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA 730IS
UT WOS:000288027600011
ER
PT J
AU Miles, EF
Nelson, JW
AF Miles, Edward F.
Nelson, John W.
TI Definitive I-125 prostate brachytherapy implant for low-risk prostate
cancer in a patient with an ileal pouch-anal anastomosis: A case report
SO BRACHYTHERAPY
LA English
DT Article
DE Prostate brachytherapy; Small bowel; Toxicity; Ileal pouch-anal
anastomosis
ID RADICAL PROSTATECTOMY; NORMAL TISSUE
AB PURPOSE: To report on the safe and effective use of a prostate brachytherapy implant for clinically low-risk prostate cancer in a patient with previous ileal pouch anal anastomosis.
METHODS AND MATERIALS: A patient with a previous history of total proctocolectomy with ileal pouch anal anastomosis was diagnosed with low-risk prostate cancer. He underwent prostate brachytherapy implant and his urinary, bowel, and sexual function were monitored preoperatively and regularly after his implant.
RESULTS: Approximately 1-year postimplant, the patient's serum prostate-specific antigen continued to decrease and urinary obstructive symptoms measured via a standardized patient-reported instrument increased transiently but returned to baseline. His sexual function remains slightly diminished. His self-reported bowel function has been essentially unchanged, and he specifically denies increased stool frequency, urgency, incontinence, tenesmus, or hematochezia.
CONCLUSIONS: Prostate brachytherapy appears to be both safe and effective for treating low-risk prostate cancer in patients with a pre-existing deal pouch-anal anastomosis. Although there is a potential for significant late injury to the neorectum, a previous small series indicated that this had not been seen. Models currently used to predict normal tissue complication probabilities do not seem well applied to this case. The developments of algorithms that more correctly model this condition are encouraged. Published by Elsevier Inc. All rights reserved.
C1 [Miles, Edward F.; Nelson, John W.] USN, Div Radiat Oncol, Dept Radiol, Med Ctr Portsmouth, Portsmouth, VA 23708 USA.
RP Miles, EF (reprint author), USN, Div Radiat Oncol, Dept Radiol, Med Ctr Portsmouth, 620 John Paul Jones Circle, Portsmouth, VA 23708 USA.
EM edward.miles@med.navy.mil
NR 19
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1538-4721
J9 BRACHYTHERAPY
JI Brachytherapy
PD MAR-APR
PY 2011
VL 10
IS 2
BP 117
EP 120
DI 10.1016/j.brachy.2010.05.005
PG 4
WC Oncology; Radiology, Nuclear Medicine & Medical Imaging
SC Oncology; Radiology, Nuclear Medicine & Medical Imaging
GA 731LN
UT WOS:000288108400004
PM 20688577
ER
PT J
AU Isken, MW
Ward, TJ
Littig, SJ
AF Isken, Mark W.
Ward, Timothy J.
Littig, Steven J.
TI An open source software project for obstetrical procedure scheduling and
occupancy analysis
SO HEALTH CARE MANAGEMENT SCIENCE
LA English
DT Article
DE Patient flow; Scheduling; Obstetrics; Open source software
ID ELECTIVE INDUCTION; QUEUING THEORY; CESAREAN-SECTION; HOSPITAL BEDS;
HEALTH-CARE; MODEL; LABOR; MANAGEMENT; CHOICE
AB Increases in the rate of births via cesarean section and induced labor have led to challenging scheduling and capacity planning problems for hospital inpatient obstetrical units. We present occupancy and patient scheduling models to help address these challenges. These patient flow models can be used to explore the relationship between procedure scheduling practices and the resulting occupancy on inpatient obstetrical units such as labor and delivery and postpartum. The models capture numerous important characteristics of inpatient obstetrical patient flow such as time of day and day of week dependent arrivals and length of stay, multiple patient types and clinical interventions, and multiple patient care units with inter-unit patient transfers. We have used these models in several projects at different hospitals involving design of procedure scheduling templates and analysis of inpatient obstetrical capacity. In the development of these models, we made heavy use of open source software tools and have released the entire project as a free and open source model and software toolkit.
C1 [Isken, Mark W.] Oakland Univ, Sch Business Adm, Rochester, MI 48063 USA.
[Ward, Timothy J.] USN, Bur Med & Surg, Washington, DC USA.
[Littig, Steven J.] Improvement Path Syst Inc, Farmington Hills, MI USA.
RP Isken, MW (reprint author), Oakland Univ, Sch Business Adm, Rochester, MI 48063 USA.
EM isken@oakland.edu
NR 51
TC 0
Z9 0
U1 1
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1386-9620
J9 HEALTH CARE MANAG SC
JI Health Care Manag. Sci.
PD MAR
PY 2011
VL 14
IS 1
BP 56
EP 73
DI 10.1007/s10729-010-9141-8
PG 18
WC Health Policy & Services
SC Health Care Sciences & Services
GA 714TL
UT WOS:000286831800004
PM 20978855
ER
PT J
AU Roberts, NC
AF Roberts, Nancy C.
TI Tracking and disrupting dark networks: Challenges of data collection and
analysis
SO INFORMATION SYSTEMS FRONTIERS
LA English
DT Article
DE Dark networks; Visual analytics; Data collection; Analysis and fusion
AB The attack on September 11, 2001 set off numerous efforts to counter terrorism and insurgencies. Central to these efforts has been the drive to improve data collection and analysis. Section 1 summarizes some of the more notable improvements among U.S. government agencies as they strive to develop their capabilities. Although progress has been made, daunting challenges remain. Section 2 reviews the basic challenges to data collection and analysis focusing in some depth on the difficulties of data integration. Three general approaches to data integration are identified-discipline-centric, placed-centric and virtual. A summary of the major challenges in data integration confronting field operators in Iraq and Afghanistan illustrates the work that lies ahead. Section 3 shifts gears to focus on the future and introduces the discipline of Visual Analytics-an emerging field dedicated to improving data collection and analysis through the use of computer-mediated visualization techniques and tools. The purpose of Visual Analytics is to maximize human capability to perceive, understand, reason, make judgments and work collaboratively with multidimensional, conflicting, and dynamic data. The paper concludes with two excellent examples of analytic software platforms that have been developed for the intelligence community-Palantir and ORA. They signal the progress made in the field of Visual Analytics to date and illustrate the opportunities that await other IS researchers interested in applying their knowledge and skills to the tracking and disrupting of dark networks.
C1 USN, Postgrad Sch, Dept Def Anal, Sch Operat & Informat Sci, Monterey, CA 93943 USA.
RP Roberts, NC (reprint author), USN, Postgrad Sch, Dept Def Anal, Sch Operat & Informat Sci, Root Hall 103H, Monterey, CA 93943 USA.
EM nroberts@nps.edu
NR 23
TC 6
Z9 6
U1 5
U2 11
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1387-3326
EI 1572-9419
J9 INFORM SYST FRONT
JI Inf. Syst. Front.
PD MAR
PY 2011
VL 13
IS 1
BP 5
EP 19
DI 10.1007/s10796-010-9271-z
PG 15
WC Computer Science, Information Systems; Computer Science, Theory &
Methods
SC Computer Science
GA 732WI
UT WOS:000288220000002
ER
PT J
AU Lewis, AC
Qidwai, SM
Jackson, M
Geltmacher, AB
AF Lewis, A. C.
Qidwai, S. M.
Jackson, M.
Geltmacher, A. B.
TI Strategies for integration of 3-D experimental data with modeling and
simulation
SO JOM
LA English
DT Article
ID TITANIUM-ALLOY; BCC CRYSTALS; FIB-SEM; MICROSTRUCTURES; DEFORMATION;
POLYCRYSTALS; COMPOSITES; MICROSCOPE; PLASTICITY; CURVATURE
AB For the most comprehensive modeling and prediction of materials behavior at the microscale, experimentally measured three-dimensional (3-D) microstructural datasets must be incorporated as initial input into computational models. Although the capability to collect and store large amounts of 3-D microstructural data is advancing continuously, computational resources for the processing and simulation can limit the amount of data that can be analyzed. Depending on the features and properties of interest, several approaches can be applied to optimize processing, reduce the amount of data that needs to be simulated, and increase the efficiency of simulations to maximize the statistical significance of microstructure analyses. This paper presents examples of four such approaches to efficient integration of large 3-D datasets into modeling and simulations of mechanical behavior in an efficient yet statistically significant manner.
C1 [Lewis, A. C.; Qidwai, S. M.; Geltmacher, A. B.] USN, Res Lab, Washington, DC 20375 USA.
[Jackson, M.] BlueQuartz Software, Springboro, OH 45066 USA.
RP Lewis, AC (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM alexis.lewis@nrl.navy.mil; mike.jackson@bluequartz.net
OI Qidwai, Siddiq/0000-0002-2389-118X
FU Office of Naval Research; DARPA [N0001407WX20381]
FX Research described in this manuscript was supported by the Office of
Naval Research and DARPA under grant #N0001407WX20381. FE Simulations
were performed through the DoD High Performance Computing Modernization
Program. The authors wish to acknowledge Professor Y. Zhang of Carnegie
Mellon University for providing the mesh depicted in Figure 5.
NR 41
TC 3
Z9 3
U1 1
U2 9
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1047-4838
J9 JOM-US
JI JOM
PD MAR
PY 2011
VL 63
IS 3
BP 35
EP 39
DI 10.1007/s11837-011-0043-0
PG 5
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Mineralogy; Mining & Mineral Processing
SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy;
Mining & Mineral Processing
GA 733IZ
UT WOS:000288257700006
ER
PT J
AU Rowenhorst, DJ
Lewis, AC
AF Rowenhorst, D. J.
Lewis, A. C.
TI Image processing and analysis of 3-D microscopy data
SO JOM
LA English
DT Article
ID GRAIN-BOUNDARIES; MICROSTRUCTURES
AB While there are many microstructural parameters that can be measured from a planar two-dimensional (2-D) section through a material, there are many measurements that require knowledge of the full three-dimensional (3-D) microstructure, such as true size and shape of individual objects, connectivity and interfacial curvatures. Serial sectioning and reconstruction can reveal the 3-D microstructure but are often considered to be time consuming and labor intensive. However, what is not often realized is that the majority of the time invested in serial sectioning is spent in the image segmentation, wherein individual objects are digitally identified. This article reviews the current state of image segmentation and novel analysis within 3-D materials science. We will also briefly discuss the future possibilities for more efficient segmentation of digital images for a broader range of materials.
C1 [Rowenhorst, D. J.; Lewis, A. C.] USN, Res Lab, Washington, DC 20375 USA.
RP Rowenhorst, DJ (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM david.row-enhorst@nrl.navy.mil
FU Office of Naval Research/DARPA; U.S. Naval Research Laboratory
FX The authors greatly acknowledge the financial support of Office of Naval
Research/DARPA under the D 3-D Digital Structures program and the U.S.
Naval Research Laboratory. The authors also would like to thank Sukbin
Lee and Anthony Rollett at Carnegie Mellon University for the generous
use of the 3MC surface meshing code.
NR 17
TC 10
Z9 10
U1 0
U2 20
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1047-4838
J9 JOM-US
JI JOM
PD MAR
PY 2011
VL 63
IS 3
BP 53
EP 57
DI 10.1007/s11837-011-0046-x
PG 5
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Mineralogy; Mining & Mineral Processing
SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy;
Mining & Mineral Processing
GA 733IZ
UT WOS:000288257700009
ER
PT J
AU Mahon, RT
AF Mahon, Richard T.
TI Exploring the depths of immersion pulmonary edema
SO JOURNAL OF APPLIED PHYSIOLOGY
LA English
DT Editorial Material
ID PRONE EXERCISE; HEMODYNAMICS; ATA
C1 USN, Undersea Med Dept, Med Res Ctr, Silver Spring, MD 20910 USA.
RP Mahon, RT (reprint author), USN, Undersea Med Dept, Med Res Ctr, 503 Robert Grant Ave, Silver Spring, MD 20910 USA.
EM Richard.Mahon@med.navy.mil
NR 6
TC 1
Z9 1
U1 0
U2 0
PU AMER PHYSIOLOGICAL SOC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA
SN 8750-7587
J9 J APPL PHYSIOL
JI J. Appl. Physiol.
PD MAR
PY 2011
VL 110
IS 3
BP 589
EP 590
DI 10.1152/japplphysiol.00019.2011
PG 2
WC Physiology; Sport Sciences
SC Physiology; Sport Sciences
GA 731RN
UT WOS:000288127100004
PM 21233342
ER
PT J
AU Toselli, I
Agrawal, B
Restaino, S
AF Toselli, Italo
Agrawal, Brij
Restaino, Sergio
TI Light propagation through anisotropic turbulence
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND
VISION
LA English
DT Article
ID NON-KOLMOGOROV TURBULENCE; STAR IMAGE MOTION; STRATOSPHERIC TURBULENCE;
OPTICAL PROPAGATION; MARINE-ENVIRONMENT; IRREGULARITIES
AB A wealth of experimental data has shown that atmospheric turbulence can be anisotropic; in this case, a Kolmogorov spectrum does not describe well the atmospheric turbulence statistics. In this paper, we show a quantitative analysis of anisotropic turbulence by using a non-Kolmogorov power spectrum with an anisotropic coefficient. The spectrum we use does not include the inner and outer scales, it is valid only inside the inertial subrange, and it has a power-law slope that can be different from a Kolmogorov one. Using this power spectrum, in the weak turbulence condition, we analyze the impact of the power-law variations alpha on the long-term beam spread and scintillation index for several anisotropic coefficient values zeta. We consider only horizontal propagation across the turbulence cells, assuming circular symmetry is maintained on the orthogonal plane to the propagation direction. We conclude that the anisotropic coefficient influences both the long-term beam spread and the scintillation index by the factor zeta(2-alpha). (C) 2011 Optical Society of America
C1 [Toselli, Italo; Agrawal, Brij] USN, Postgrad Sch, Mech & Astronaut Engn Dept, Monterey, CA 93943 USA.
[Restaino, Sergio] Remote Sensing Div, Albuquerque, NM 87117 USA.
RP Toselli, I (reprint author), USN, Postgrad Sch, Mech & Astronaut Engn Dept, Monterey, CA 93943 USA.
EM itoselli@nps.edu; agrawal@nps.edu; sergio.restaino@gmail.com
FU National Research Council
FX This research was performed while the author I. Toselli held a National
Research Council Research Associateship Award at Spacecraft Research and
Design Center, Department of Mechanical and Astronautical Engineering,
Naval Postgraduate School, Monterey, California.
NR 24
TC 47
Z9 50
U1 0
U2 9
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1084-7529
J9 J OPT SOC AM A
JI J. Opt. Soc. Am. A-Opt. Image Sci. Vis.
PD MAR
PY 2011
VL 28
IS 3
BP 483
EP 488
DI 10.1364/JOSAA.28.000483
PG 6
WC Optics
SC Optics
GA 730DI
UT WOS:000288012400025
PM 21383832
ER
PT J
AU Salvalaggio, PR
Dzebisashvili, N
MacLeod, KE
Lentine, KL
Gheorghian, A
Schnitzler, MA
Hohmann, S
Segev, DL
Gentry, SE
Axelrod, DA
AF Salvalaggio, Paolo R.
Dzebisashvili, Nino
MacLeod, Kara E.
Lentine, Krista L.
Gheorghian, Adrian
Schnitzler, Mark A.
Hohmann, Samuel
Segev, Dorry L.
Gentry, Sommer E.
Axelrod, David A.
TI The Interaction Among Donor Characteristics, Severity of Liver Disease,
and the Cost of Liver Transplantation
SO LIVER TRANSPLANTATION
LA English
DT Article
ID RESOURCE UTILIZATION; ECONOMIC-IMPACT; RISK INDEX; MELD SCORE; DONATION;
MODEL; COMPLICATIONS; ALLOCATION; ALLOGRAFTS; OUTCOMES
AB Accurate assessment of the impact of donor quality on liver transplant (LT) costs has been limited by the lack of a large, multicenter study of detailed clinical and economic data. A novel, retrospective database linking information from the University HealthSystem Consortium and the Organ Procurement and Transplantation Network registry was analyzed using multi-variate regression to determine the relationship between donor quality (assessed through the Donor Risk Index [DRI]), recipient illness severity, and total inpatient costs (transplant and all readmissions) for 1 year following LT. Cost data were available for 9059 LT recipients. Increasing MELD score, higher DRI, simultaneous liver-kidney transplant, female sex, and prior liver transplant were associated with increasing cost of LT (P < 0.05). MELD and DRI interact to synergistically increase the cost of LT (P < 0.05). Donors in the highest DRI quartile added close to $12,000 to the cost of transplantation and nearly $22,000 to posttransplant costs in comparison to the lowest risk donors. Among the individual components of the DRI, donation after cardiac death (increased costs by $20,769 versus brain dead donors) had the greatest impact on transplant costs. Overall, 1-year costs were increased in older donors, minority donors, nationally shared organs, and those with cold ischemic times of 7-13 hours (P < 0.05 for all). In conclusion, donor quality, as measured by the DRI, is an independent predictor of LT costs in the perioperative and postoperative periods. Centers in highly competitive regions that perform transplantation on higher MELD patients with high DRI livers may be particularly affected by the synergistic impact of these factors. Liver Transpl 17:233-242, 2011. (C) 2011 AASLD.
C1 [Dzebisashvili, Nino; Lentine, Krista L.; Gheorghian, Adrian; Schnitzler, Mark A.] St Louis Univ, Ctr Outcomes Res, Sch Med, St Louis, MO 63104 USA.
[Salvalaggio, Paolo R.; MacLeod, Kara E.] Univ Washington, Dept Surg, Seattle, WA 98195 USA.
[MacLeod, Kara E.] Univ Washington, Surg Outcomes Res Ctr, Seattle, WA 98195 USA.
[Hohmann, Samuel] Univ HealthSystem Consortium, Oak Brook, IL USA.
[Segev, Dorry L.] Johns Hopkins Univ, Dept Surg, Baltimore, MD USA.
[Gentry, Sommer E.] USN Acad, Dept Math, Baltimore, MD USA.
[Axelrod, David A.] Dartmouth Hitchcock Med Ctr, Dept Surg, Hanover, NH USA.
RP Lentine, KL (reprint author), St Louis Univ, Ctr Outcomes Res, Sch Med, 3545 Lafayette Ave, St Louis, MO 63104 USA.
EM lentinek@slu.edu
OI Gentry, Sommer/0000-0003-4530-8917
FU National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
[1RC1DK086450, K08DK073036]; Health Resources and Services
Administration [234-2005-370011C]
FX The researchers were supported in part by an American Recovery and
Reinvestment Act Grant from the National Institute of Diabetes and
Digestive and Kidney Diseases (NIDDK), 1RC1DK086450. This work was
supported in part by Health Resources and Services Administration
contract 234-2005-370011C. Dr. Lentine received career development
support from an NIDDK grant, K08DK073036. The content is the
responsibility of the authors alone.
NR 26
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Z9 63
U1 0
U2 3
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1527-6465
J9 LIVER TRANSPLANT
JI Liver Transplant.
PD MAR
PY 2011
VL 17
IS 3
BP 233
EP 242
DI 10.1002/lt.22230
PG 10
WC Gastroenterology & Hepatology; Surgery; Transplantation
SC Gastroenterology & Hepatology; Surgery; Transplantation
GA 732IL
UT WOS:000288178100003
PM 21384505
ER
PT J
AU Liu, JM
Davis, CE
Regin, TM
Brophy, J
AF Liu, John M.
Davis, Carrie E.
Regin, Terri M.
Brophy, Joseph
TI Monitoring the Growth of Hidden Corrosion Discontinuities in a Pipeline
with Complex Geometry Using Torsional Mode Ultrasonic Guided Wave
SO MATERIALS EVALUATION
LA English
DT Article
DE Ultrasonic guided waves; pipes; corrosion monitoring; discontinuity
growth; effects of welds and elbows
ID LONG-RANGE; PROPAGATION; PIPES
AB The peak amplitude of the fundamental torsional mode, T(0,1), ultrasonic guided wave, excited and sensed by commercially available equipment using permanently mounted magnetostrictive transducers, was used to monitor the growth of electrochemically induced, external discontinuities in a steel pipeline (216 mm outside diameter). The pipeline was more than 30.5 m tong, had multiple welds and two 90 degrees elbows. Over the course of eight months, two discontinuities, hidden from ultrasonic testing (UT) technicians, grew systematically in both area and depth, providing the opportunity to experimentally evaluate the effects of complex geometry on signal characteristics. Corrosion around a weld was also studied. The obtained results were compared with a surface discontinuity that was unaffected by intermediate welds located between the transducer and the discontinuity. It was found that the effects of multiple welds and an elbow decreased the sensitivity for discontinuity growth monitoring by a factor of less than two. This was established by examining the scaling of discontinuity signal peak heights against a weld peak instead of using a conventional distance-amplitude-correction (DAC) curve to account for material attenuation, by comparing the signals from a discontinuity viewed along the forward and the reverse direction, and by allowing the discontinuities to change in all three dimensions in the course of this monitoring effort. This controlled study for discontinuity growth monitoring can be useful to guide efforts on discontinuity growth monitoring of complex pipelines in the field.
C1 [Liu, John M.; Davis, Carrie E.] Naval Surface Warfare Ctr Carderock Div, Bethesda, MD USA.
[Regin, Terri M.] Naval Facil Engn Command, Washington, DC USA.
[Brophy, Joseph] B&E Ltd, San Antonio, TX USA.
RP Liu, JM (reprint author), Naval Surface Warfare Ctr Carderock Div, Bethesda, MD USA.
FU Sustainable Infrastructure Panel of the DOD; Ignacio Perez of the Office
of Naval Research
FX This work was supported by the Sustainable Infrastructure Panel of the
DOD Environmental Security Technology Certification Program (ESTCP),
managed by John A. Hall. The support of Ignacio Perez of the Office of
Naval Research for the pursuit of ultrasonic guided wave technology at
NSWCCD is also gratefully acknowledged. The authors wish to thank
Johnnie Deloach, manager of the welding, processing and NDE branch,
Naval Surface Warfare Center Carderock Division, for useful comments
during the preparation of this paper.
NR 14
TC 0
Z9 0
U1 2
U2 4
PU AMER SOC NONDESTRUCTIVE TEST
PI COLUMBUS
PA 1711 ARLINGATE LANE PO BOX 28518, COLUMBUS, OH 43228-0518 USA
SN 0025-5327
J9 MATER EVAL
JI Mater. Eval.
PD MAR
PY 2011
VL 69
IS 3
BP 393
EP 400
PG 8
WC Materials Science, Characterization & Testing
SC Materials Science
GA 733BL
UT WOS:000288235300003
ER
PT J
AU Krowne, CM
Kirchoefer, SW
Chang, W
Pond, JM
Alldredge, LMB
AF Krowne, C. M.
Kirchoefer, S. W.
Chang, W.
Pond, J. M.
Alldredge, L. M. B.
TI Examination of the Possibility of Negative Capacitance Using
Ferroelectric Materials in Solid State Electronic Devices
SO NANO LETTERS
LA English
DT Article
DE Negative capacitance; ferroelectric; energy storage; polarization
behavior
AB We show here, using fundamental energy storage relationships for capacitors, that there are severe constraints upon what can be realized utilizing ferroelectric materials as FET dielectrics. A basic equation governing all small signal behavior is derived, a negative capacitance quality factor is defined based upon it, and thousands of carefully measured devices are evaluated. We show that no instance of negative capacitance occurs within our huge database. Furthermore, we demonstrate that highly nonlinear biasing behavior in a series stack could be misinterpreted as giving a negative capacitance.
C1 [Krowne, C. M.; Kirchoefer, S. W.; Chang, W.; Pond, J. M.; Alldredge, L. M. B.] USN, Res Lab, Microwave Technol Branch, Elect Sci & Technol Div, Washington, DC 20375 USA.
RP Krowne, CM (reprint author), USN, Res Lab, Microwave Technol Branch, Elect Sci & Technol Div, Washington, DC 20375 USA.
EM cliff.krowne@nrl.navy.mil
NR 15
TC 21
Z9 21
U1 3
U2 37
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD MAR
PY 2011
VL 11
IS 3
BP 988
EP 992
DI 10.1021/nl1037215
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 730UY
UT WOS:000288061500012
PM 21280668
ER
PT J
AU Felt, SA
Wasfy, MO
El-Tras, WF
Samir, A
Rahaman, BA
Boshra, M
Parker, TM
Hatem, ME
El-Bassiouny, AA
Murray, CK
Pimentel, G
AF Felt, Stephen A.
Wasfy, Momtaz O.
El-Tras, Wael F.
Samir, Ahmed
Rahaman, Bassem Abdel
Boshra, Marie
Parker, Tina M.
Hatem, Mahmoud Essam
El-Bassiouny, Ahmed Ahmed
Murray, Clinton K.
Pimentel, Guillermo
TI Cross-Species Surveillance of Leptospira in Domestic and Pen-Domestic
Animals in Mahalla City, Gharbeya Governorate, Egypt
SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
LA English
DT Article
ID ACUTE FEBRILE ILLNESS; PATHOGENIC LEPTOSPIRES; CANINE LEPTOSPIROSIS;
INFECTION; SHEEP; EAST; FARM; DOGS; PCR
AB A survey of 179 animals (black rats, dogs, sheep, buffaloes, cattle, donkeys, weasels, and cats) for Leptospira infection was conducted in Mahalla City (Lower Egypt). Blood, urine, and kidney were collected and tested by culture, microscopic agglutination test (MAT), and/or polymerase chain reaction (PCR). Among rats, 26% were positive by PCR, including 7% that were also positive by culture for L. interrogans serovars Grippotyphosa, Pyrogenes, and Icterohaemorrhagiae. L. borpetersenii serovar Polonica was isolated for the first time in Egypt in three rats. MAT titers >= 1:800 were observed in 11% of rats and 12% of dogs. L. interrogans serovar Grippotyphosa was detected in one cat. Sheep and donkeys were negative for leptospirosis by all methods. Buffaloes and cattle were seropositive in 20% and 44% of animals, respectively. Data indicate that several pathogenic serovars are circulating in the animals, which may pose exposure risks and account for high rates of acute febrile illness.
C1 [Wasfy, Momtaz O.; Rahaman, Bassem Abdel; Boshra, Marie; Pimentel, Guillermo] USN, Med Res Unit 3, Lab Unit, Cairo 11517, Egypt.
[Felt, Stephen A.] Stanford Univ, Dept Comparat Med, Stanford, CA 94305 USA.
[Parker, Tina M.] NIAID, TB Leprosy & Other Mycobacterial Dis Resp Dis Bra, DMID, NIH,DHHS, Bethesda, MD 20892 USA.
[El-Tras, Wael F.; El-Bassiouny, Ahmed Ahmed] Kafr El Sheik Univ, Fac Vet Med, Dept Hyg & Prevent Med, Kafr Al Sheikh, Egypt.
[Samir, Ahmed] Cairo Univ, Fac Vet, Dept Microbiol, Coll Med, Cairo, Egypt.
[Hatem, Mahmoud Essam] Cairo Univ, Fac Vet Med, Dept Microbiol, Cairo, Egypt.
[Murray, Clinton K.] Brooke Army Med Ctr, Infect Dis Serv, Ft Sam Houston, TX 78234 USA.
RP Wasfy, MO (reprint author), USN, Med Res Unit 3, Lab Unit, 3A Imtidad Ramses St, Cairo 11517, Egypt.
EM felt@stanford.edu; momtaz.wasfy.eg@med.navy.mil; wael_tras@yahoo.com;
ahmedsamir121@hotmail.com; bassem.abdel-rahman.eg@med.navy.mil;
marie.boshra@gmail.com; parkerti@niaid.nih.gov; essamhatem@yahoo.com;
bassiounya@yahoo.com; clinton.murray@us.army.mil
OI El-Tras, Wael/0000-0003-1276-7164; Pimentel,
Guillermo/0000-0003-2464-1526
FU Global Emerging Infections Surveillance (GEIS); Institutional Animal
Care and Use Committee of the US Naval Medical Research Unit-3 (NAMU-3);
Accreditation of the International Association of Assessment of
Laboratory Animal Care (AAALAC)
FX The opinions and assertions contained herein are the private ones of the
authors and are not to be construed as official or reflecting the views
of the US Navy Department or Egypt. Copyright statement: some of the
authors are employees of the US Government, and this work was prepared
as part of their official duties. Title 17 U.S.C. 105 provides that
"copyright protection under this title is not available for any work of
the United States Government." Title 17 U.S.C. 001 defines a US
Government work as a work prepared by a military service member or
employee of the US Government as part of that person's official duties.
This work was funded by Global Emerging Infections Surveillance (GEIS)
in compliance with the regulations of the Institutional Animal Care and
Use Committee of the US Naval Medical Research Unit-3 (NAMU-3) and
Accreditation of the International Association of Assessment of
Laboratory Animal Care (AAALAC).
NR 39
TC 16
Z9 16
U1 0
U2 7
PU AMER SOC TROP MED & HYGIENE
PI MCLEAN
PA 8000 WESTPARK DR, STE 130, MCLEAN, VA 22101 USA
SN 0002-9637
J9 AM J TROP MED HYG
JI Am. J. Trop. Med. Hyg.
PD MAR
PY 2011
VL 84
IS 3
BP 420
EP 425
DI 10.4269/ajtmh.2011.10-0393
PG 6
WC Public, Environmental & Occupational Health; Tropical Medicine
SC Public, Environmental & Occupational Health; Tropical Medicine
GA 730AK
UT WOS:000287995600011
PM 21363980
ER
PT J
AU Maves, RC
Castillo, R
Guillen, A
Espinosa, B
Meza, R
Espinoza, N
Nunez, G
Sanchez, L
Chacaltana, J
Cepeda, D
Gonzalez, S
Hall, ER
AF Maves, Ryan C.
Castillo, Rosa
Guillen, Alfredo
Espinosa, Benjamin
Meza, Rina
Espinoza, Nereyda
Nunez, Gladys
Sanchez, Luis
Chacaltana, Jesus
Cepeda, David
Gonzalez, Sofia
Hall, Eric R.
TI Antimicrobial Susceptibility of Brucella melitensis Isolates in Peru
SO ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
LA English
DT Article
AB Brucellosis is an important public health problem in Peru. We evaluated 48 human Brucella melitensis biotype 1 strains from Peru between 2000 and 2006. MICs of isolates to doxycycline, azithromycin, gentamicin, rifampin, ciprofloxacin, and trimethoprim-sulfamethoxazole were determined by the Etest method. All isolates were sensitive to tested drugs during the periods of testing. Relapses did not appear to be related to drug resistance.
C1 [Maves, Ryan C.; Castillo, Rosa; Meza, Rina; Espinoza, Nereyda; Nunez, Gladys; Cepeda, David] Naval Med Res Ctr Detachment, Lima, Peru.
[Guillen, Alfredo] Clin San Borja, Lima, Peru.
[Espinosa, Benjamin] USN, Environm & Prevent Med Unit 2, Norfolk, VA USA.
[Chacaltana, Jesus] Hosp Nacl Daniel Alcides Carrion, Callao, Peru.
[Sanchez, Luis] Hosp Arzobispo Loayza, Lima, Peru.
[Gonzalez, Sofia] Ctr Med Naval Cirujano Mayor Santiago Tavara, Callao, Peru.
[Hall, Eric R.] USN, Med Res Ctr, Silver Spring, MD USA.
RP Maves, RC (reprint author), USN, San Diego Med Ctr, Div Infect Dis, 34800 Bob Wilson Dr, San Diego, CA 92134 USA.
EM Ryan.Maves@med.navy.mil
RI Valle, Ruben/A-7512-2013
FU Global Emerging Infections Surveillance and Response System, a Division
of the Armed Forces Health Surveillance Center [60000.000.0.B0017]
FX This work was supported by work unit 60000.000.0.B0017 and funded by the
Global Emerging Infections Surveillance and Response System, a Division
of the Armed Forces Health Surveillance Center.
NR 15
TC 9
Z9 10
U1 0
U2 2
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0066-4804
J9 ANTIMICROB AGENTS CH
JI Antimicrob. Agents Chemother.
PD MAR
PY 2011
VL 55
IS 3
BP 1279
EP 1281
DI 10.1128/AAC.00979-10
PG 3
WC Microbiology; Pharmacology & Pharmacy
SC Microbiology; Pharmacology & Pharmacy
GA 726AD
UT WOS:000287687100048
PM 21199926
ER
PT J
AU Kukhtarev, N
Kukhtareva, T
Gallegos, SC
AF Kukhtarev, Nickolai
Kukhtareva, Tatiana
Gallegos, Sonia C.
TI Holographic interferometry of oil films and droplets in water with a
single-beam mirror-type scheme
SO APPLIED OPTICS
LA English
DT Article
ID SCATTERING; RAINDROPS; EMULSION
AB Application of single-beam reflective laser optical interferometry for oil films and droplets in water detection and characterization is discussed. Oil films can be detected by the appearance of characteristic interference patterns. Analytical expressions describing intensity distribution in these interference patterns allow determination of oil film thickness, size of oil droplets, and distance to the oil film from the observation plane. Results from these analyses indicate that oil spill aging and breakup can be monitored in real time by analyzing time-dependent holographic fringe patterns. Interferometric methods of oil spill detection and characterization can be automated using digital holography with three-dimensional reconstruction of the time-changing oil spill topography. In this effort, the interferometric methods were applied to samples from Chevron oil and British Petroleum MC252 oil obtained during the Deep Water Horizon oil spill in the Gulf of Mexico. (C) 2011 Optical Society of America
C1 [Kukhtarev, Nickolai; Kukhtareva, Tatiana] Alabama A&M Univ, Dept Phys, Normal, AL 35762 USA.
[Gallegos, Sonia C.] USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
RP Kukhtarev, N (reprint author), Alabama A&M Univ, Dept Phys, Normal, AL 35762 USA.
EM nickoly.kukhtarev@aamu.edu
FU Alabama AM University; American Society for Engineering Education/Office
of Naval Research (ONR); NASA-ROSES [NNH08ZDA001N: A28]
FX This work was supported by the Title III Program of the Alabama A&M
University for T. Kukhtareva and an American Society for Engineering
Education/Office of Naval Research (ONR) Summer Fellowship for N.
Kukhtarev. Support for S. C. Gallegos was provided by NASA-ROSES 2008
NNH08ZDA001N: A28: Earth Science for Decision Making: Gulf of Mexico
Region. Special thanks are extended to Chevron Pascagoula refinery for
providing crude oil samples and to M. Ben Kinney from Exponent, Inc. for
supplying the dispersant samples utilized in this study.
NR 15
TC 8
Z9 10
U1 0
U2 9
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD MAR 1
PY 2011
VL 50
IS 7
BP B53
EP B57
DI 10.1364/AO.50.000B53
PG 5
WC Optics
SC Optics
GA 728CN
UT WOS:000287851800010
PM 21364712
ER
PT J
AU Xiao, Y
Zhang, YP
Gibson, JH
Xie, GG
Chen, H
AF Xiao, Yang
Zhang, Yanping
Gibson, John H.
Xie, Geoffrey G.
Chen, Hui
TI Performance analysis of ALOHA and p-persistent ALOHA for multi-hop
underwater acoustic sensor networks
SO CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND
APPLICATIONS
LA English
DT Article
DE Underwater acoustic sensor networks; MAC; ALOHA; p-persistent ALOHA;
Multi-hop
ID IEEE-802.11
AB The extreme conditions under which multi-hop underwater acoustic sensor networks (UASNs) operate constrain the performance of medium access control (MAC) protocols. The MAC protocol employed significantly impacts the operation of the network supported, and such impacts must be carefully considered when developing protocols for networks constrained by both bandwidth and propagation delay.
Time-based coordination, such as TDMA, have limited applicability due to the dynamic nature of the water channel used to propagate the sound signals, as well as the significant effect of relatively small changes in propagation distance on the propagation time. These effects cause inaccurate time synchronization and therefore make time-based access protocols less viable. The large propagation delays also diminish the effectiveness of carrier sense protocols as they do not predict with any certainty the status of the intended recipients at the point when the traffic would arrive. Thus, CSMA protocols do not perform well in UASNs, either.
Reservation-based protocols have seldom been successful in commercial products over the past 50 years due to many drawbacks, such as limited scalability, relatively low robustness, etc. In particular, the impact of propagation delays in UASNs and other such constrained networks obfuscate the operation of the reservation protocols and diminish, if not completely negate, the benefit of reservations. The efficacy of the well-known RTS-CTS scheme, as a reservation-based enhancement to the CSMA protocol, is also adversely impacted by long propagation delays.
An alternative to these MAC protocols is the much less complex ALOHA protocol, or one of its variants. However, the performance of such protocols within the context of multi-hop networks is not well studied. In this paper we identify the challenges of modeling contention-based MAC protocols and present models for analyzing ALOHA and p-persistent ALOHA variants for a simple string topology. As expected, an application of the model suggests that ALOHA variants are very sensitive to traffic loads. Indeed, when the traffic load is small, utilization becomes insensible to p values. A key finding, though, is the significance of the network size on the protocols' performance, in terms of successful delivery of traffic from outlying nodes, indicating that such protocols are only appropriate for very small networks, as measured by hop count.
C1 [Xiao, Yang; Zhang, Yanping] Univ Alabama, Dept Comp Sci, Tuscaloosa, AL 35487 USA.
[Gibson, John H.; Xie, Geoffrey G.] USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
[Chen, Hui] Virginia State Univ, Dept Math & Comp Sci, Petersburg, VA 23806 USA.
RP Xiao, Y (reprint author), Univ Alabama, Dept Comp Sci, Tuscaloosa, AL 35487 USA.
EM yangxiao@ieee.org; yzhang@cs.ua.edu; jhgibson@nps.edu; xie@nps.edu;
huichen@ieee.org
RI Chen, Hui/C-9645-2013
OI Chen, Hui/0000-0002-9840-4876
FU US National Science Foundation (NSF) [CCF-0829827, CNS-0716211,
CNS-0737325]
FX This work is supported in part by the US National Science Foundation
(NSF) under the grant numbers CCF-0829827, CNS-0716211, and CNS-0737325.
NR 62
TC 14
Z9 14
U1 1
U2 6
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1386-7857
EI 1573-7543
J9 CLUSTER COMPUT
JI Cluster Comput.
PD MAR
PY 2011
VL 14
IS 1
SI SI
BP 65
EP 80
DI 10.1007/s10586-009-0093-z
PG 16
WC Computer Science, Information Systems; Computer Science, Theory &
Methods
SC Computer Science
GA 726VH
UT WOS:000287754100006
ER
PT J
AU Strycharz, SM
Malanoski, AP
Snider, RM
Yi, H
Lovley, DR
Tender, LM
AF Strycharz, Sarah M.
Malanoski, Anthony P.
Snider, Rachel M.
Yi, Hana
Lovley, Derek R.
Tender, Leonard M.
TI Application of cyclic voltammetry to investigate enhanced catalytic
current generation by biofilm-modified anodes of Geobacter
sulfurreducens strain DL1 vs. variant strain KN400
SO ENERGY & ENVIRONMENTAL SCIENCE
LA English
DT Article
ID MICROBIAL FUEL-CELLS; EXTRACELLULAR ELECTRON-TRANSFER; SELF-ASSEMBLED
MONOLAYERS; REDOX POLYMER; HARVESTING ELECTRICITY; RESPIRING BACTERIA;
POWER-GENERATION; ACTIVATED CARBON; STEADY-STATE; MODEL
AB A biofilm of Geobacter sulfurreducens will grow on an anode surface and catalyze the generation of an electrical current by oxidizing acetate and utilizing the anode as its metabolic terminal electron acceptor. Here we report qualitative analysis of cyclic voltammetry of anodes modified with biofilms of G. sulfurreducens strains DL1 and KN400 to predict possible rate-limiting steps in current generation. Strain KN400 generates approximately 2 to 8-fold greater current than strain DL1 depending upon the electrode material, enabling comparative electrochemical analysis to study the mechanism of current generation. This analysis is based on our recently reported electrochemical model for biofilm-catalyzed current generation expanded here to a five step model; Step 1 is mass transport of acetate, carbon dioxide and protons into and out of the biofilm, Step 2 is microbial turnover of acetate to carbon dioxide and protons, Step 3 is the non-concerted, 1-electron reduction of 8 equivalents of electron transfer (ET) mediator, Step 4 is extracellular electron transfer (EET) through the biofilm to the electrode surface, and Step 5 is the reversible oxidation of reduced mediator by the electrode. Five idealized voltammetric current vs. potential dependencies (voltammograms) are derived, one for when each step in the model is assumed to limit catalytic current. Comparison to experimental voltammetry of DL1 and KN400 biofilm-modified anodes suggests that for both strains, the microbial oxidation of acetate (Step 2) is fast compared to microbial reduction of ET mediator (Step 3), and either Step 3 or EET through the biofilm (Step 4) limits catalytic current generation. The possible limitation of catalytic current by Step 4 is consistent with proton concentration gradients observed within these biofilms and finite thicknesses achieved by these biofilms. The model presented here has been universally designed for application to biofilms other than G. sulfurreducens and could serve as a platform for future quantitative voltammetric analysis of non-corrosive anode and cathode reactions catalyzed by microorganisms.
C1 [Strycharz, Sarah M.; Malanoski, Anthony P.; Snider, Rachel M.; Tender, Leonard M.] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
[Yi, Hana; Lovley, Derek R.] Univ Massachusetts, Dept Microbiol, Morrill Sci Ctr N 4, Amherst, MA 01003 USA.
RP Strycharz, SM (reprint author), USN, Res Lab, Ctr Biomol Sci & Engn, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM tender@nrl.navy.mil
RI Malanoski, Anthony/C-7814-2011
OI Malanoski, Anthony/0000-0001-6192-888X
FU Naval Research Laboratory; Office of Naval Research [N00014-10-1-0084,
N00014-10-WX20463]
FX This work support by the Naval Research Laboratory (L. M. T.) and the
Office of Naval Research (D. R. L.: No. N00014-10-1-0084, L. M. T: Grant
No. N00014-10-WX20463).
NR 60
TC 92
Z9 92
U1 5
U2 106
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1754-5692
J9 ENERG ENVIRON SCI
JI Energy Environ. Sci.
PD MAR
PY 2011
VL 4
IS 3
BP 896
EP 913
DI 10.1039/c0ee00260g
PG 18
WC Chemistry, Multidisciplinary; Energy & Fuels; Engineering, Chemical;
Environmental Sciences
SC Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology
GA 729CE
UT WOS:000287924700034
ER
PT J
AU Moon, JS
Curtis, D
Zehnder, D
Kim, S
Gaskill, DK
Jernigan, GG
Myers-Ward, RL
Eddy, CR
Campbell, PM
Lee, KM
Asbeck, P
AF Moon, J. S.
Curtis, D.
Zehnder, D.
Kim, S.
Gaskill, D. K.
Jernigan, G. G.
Myers-Ward, R. L.
Eddy, C. R., Jr.
Campbell, P. M.
Lee, K. -M.
Asbeck, P.
TI Low-Phase-Noise Graphene FETs in Ambipolar RF Applications
SO IEEE ELECTRON DEVICE LETTERS
LA English
DT Article
DE Field-effect transistor (FET); frequency multiplier; graphene; mixer;
phase noise; 1/f noise
ID EPITAXIAL GRAPHENE; TRANSISTORS
AB In this letter, we present both the 1/f noise and phase noise performance of top-gated epitaxial graphene field-effect transistors (FETs) in nonlinear circuit applications for the first time. In the case of frequency doublers, the fundamental signal is suppressed by 25 dB below the second harmonic signal. With a phase noise of -110 dBc/Hz measured at a 10-kHz offset, a carrier-to-noise degradation (Delta CNR) of 6 dB was measured for the frequency doubler. This implies noiseless frequency multiplication without additional 1/f noise upconversion during the nonlinear process. The frequency multiplication was demonstrated above the gigahertz range. The 1/f noise of top-gated epitaxial graphene FETs is comparable or lower than that of exfoliated graphene FETs.
C1 [Moon, J. S.; Curtis, D.; Zehnder, D.; Kim, S.] HRL Labs LLC, Malibu, CA 90265 USA.
[Gaskill, D. K.; Jernigan, G. G.; Myers-Ward, R. L.; Eddy, C. R., Jr.; Campbell, P. M.] USN, Res Labs, Washington, DC 20375 USA.
[Lee, K. -M.; Asbeck, P.] Univ Calif San Diego, La Jolla, CA 92093 USA.
RP Moon, JS (reprint author), HRL Labs LLC, Malibu, CA 90265 USA.
FU Defense Advanced Research Projects Agency (DARPA) [N66001-08-C-2048]
FX This work was supported by the Defense Advanced Research Projects Agency
(DARPA) and monitored by Dr. John Albrecht at DARPA under SPAWAR
Contract N66001-08-C-2048. The views, opinions, and/or findings
contained in this letter are those of the author/presenter and should
not be interpreted as representing the official views or policies,
either expressed or implied, of the Defense Advanced Research Projects
Agency or the Department of Defense. The review of this letter was
arranged by Editor L. Selmi.
NR 17
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U1 1
U2 43
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0741-3106
J9 IEEE ELECTR DEVICE L
JI IEEE Electron Device Lett.
PD MAR
PY 2011
VL 32
IS 3
BP 270
EP 272
DI 10.1109/LED.2010.2100074
PG 3
WC Engineering, Electrical & Electronic
SC Engineering
GA 725PR
UT WOS:000287658400016
ER
PT J
AU Nasir, A
Todd, CS
Stanekzai, MR
Bautista, CT
Botros, BA
Scott, PT
Kim, JH
Strathdee, SA
Tjaden, J
AF Nasir, Abdul
Todd, Catherine S.
Stanekzai, Mohammad R.
Bautista, Christian T.
Botros, Boulos A.
Scott, Paul T.
Kim, Jerome H.
Strathdee, Steffanie A.
Tjaden, Jeffrey
TI Implications of hepatitis C viremia vs. antibody alone on transmission
among male injecting drug users in three Afghan cities
SO INTERNATIONAL JOURNAL OF INFECTIOUS DISEASES
LA English
DT Article
DE Afghanistan; Injecting drug user; HCV; Harm reduction; HIV-HCV
co-infection
ID SEXUALLY-TRANSMITTED INFECTIONS; RISK BEHAVIORS; VIRUS REINFECTION; HIGH
PREVALENCE; SPONTANEOUS CLEARANCE; RNA LEVELS; HIV; COHORT;
EPIDEMIOLOGY; COINFECTION
AB Objectives: To assess differences between injecting drug users (IDUs) with hepatitis C virus (HCV) viremia and IDUs with HCV antibody (Ab) or no evidence of prior infection in three Afghan cities.
Methods: IDUs in Hirat, Jalalabad, and Mazar-i-Sharif completed questionnaires and rapid testing for blood-borne infections including HCV Ab. HCV Ab was confirmed with a recombinant immunoblot assay (RIBA); RIBA-positive specimens underwent reverse transcriptase polymerase chain reaction (RT-PCR) for HCV. Risk behaviors associated with viremia were assessed with site-controlled ordinal regression analysis.
Results: Of 609 participants, 223 (36.6%) had confirmed HCV Ab. Of 221 with serum available for PCR evaluation, 127 (57.5%) were viremic. HCV viremia prevalence did not differ by site (range 41.7-59.1%; p = 0.52). Among all IDUs, in age and site-controlled ordinal regression analysis, HCV was independently associated with HIV co-infection (adjusted odds ratio (AOR) 7.16, 95% confidence interval (CI) 4.41-11.64), prior addiction treatment (AOR 1.95, 95% CI 1.57-2.42), ever aspirating and re-injecting blood (AOR 1.62, 95% CI 1.18-2.23), prior incarceration (AOR 1.60, 95% CI 1.04-2.45), and sharing injecting equipment in the last 6 months (AOR 1.35, 95% CI 1.02-1.80).
Conclusion: HCV viremia was present in many participants with prior HCV infection and was associated with some injecting risk behaviors, indicating a substantial risk for transmission. Current harm reduction programs should aim to improve HCV awareness and prevention among IDUs in Afghanistan as a matter of urgency. (C) 2010 International Society for Infectious Diseases. Published by Elsevier Ltd. All rights reserved.
C1 [Todd, Catherine S.] Columbia Univ, Dept Obstet & Gynecol, New York, NY 10032 USA.
[Nasir, Abdul; Stanekzai, Mohammad R.] Int Rescue Comm, Kabul, Afghanistan.
[Bautista, Christian T.; Scott, Paul T.; Kim, Jerome H.] US Mil HIV Res Program, Rockville, MD USA.
[Botros, Boulos A.; Tjaden, Jeffrey] USN, Med Res Unit 3, Virol Res Program, Cairo, Egypt.
[Strathdee, Steffanie A.] Univ Calif San Diego, Div Int Hlth & Cross Cultural Med, La Jolla, CA 92093 USA.
RP Todd, CS (reprint author), Columbia Univ, Dept Obstet & Gynecol, 622W 168th St, New York, NY 10032 USA.
EM cst2121@columbia.edu
FU Walter Reed Army Institute of Research; Fogarty International Center of
the National Institutes of Health [K01TW007408]
FX This study was funded by the Walter Reed Army Institute of Research. The
opinions and assertions made by the authors do not reflect the official
position or opinion of the US Department of the Navy or Army, or of the
respective in-country National HIV/AIDS Control Programs and other
non-governmental organizations (NGOs). Dr Todd appreciates support from
the Fogarty International Center of the National Institutes of Health
(K01TW007408). Study sponsors had no involvement in study design, data
collection or analysis, or in the writing or decision to submit the
manuscript.
NR 33
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U1 0
U2 0
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1201-9712
J9 INT J INFECT DIS
JI Int. J. Infect. Dis.
PD MAR
PY 2011
VL 15
IS 3
BP E201
EP E205
DI 10.1016/j.ijid.2010.11.006
PG 5
WC Infectious Diseases
SC Infectious Diseases
GA 729RD
UT WOS:000287967500008
PM 21190883
ER
PT J
AU Bond, JW
Eliopulos, LN
Brady, TF
AF Bond, John W.
Eliopulos, Louis N.
Brady, Thomas F.
TI Visualization of Latent Fingermark Corrosion of Brass, Climatic
Influence in a Comparison Between the UK and Iraq
SO JOURNAL OF FORENSIC SCIENCES
LA English
DT Article
DE forensic science; latent fingermark; print visualization; metal surface;
electrochemical mechanism; latent fingermark components; climate;
detection
ID OXIDE THIN-FILMS; FINGERPRINT CORROSION; CUPROUS-OXIDE; ZINC; COPPER;
XPS
AB Through a comparison of fingermark sweat corrosion of alpha phase brass in both the U.K. and Iraq, we show how samples from Iraq have improved fingermark corrosion over U.K. samples that require no additional enhancement prior to visualization. Over 50% of Iraqi samples produced fingermark corrosion with full ridge detail compared with 0% from the U.K. X-ray photoelectron spectroscopy analysis of the fingermark corrosion products showed that Iraqi samples exhibit more dezincification with the Zn:Cu ratio averaging 1:1.82 compared with 1:3.07 for U.K. samples. Auger spectroscopy showed the presence of both zinc oxide and copper (I) oxide. No copper (II) was observed on the surface of the corroded brass. Opportunities to exploit the optical properties of these thin film oxides to enhance the visualization of fingermark corrosion are considered, and the potential to use fingermark corrosion of metal as a means of visualizing fingerprints in war zones is discussed.
C1 [Bond, John W.] Northamptonshire Police, Sci Support Unit, Northampton NN4 0JQ, England.
[Bond, John W.] Univ Leicester, Forens Res Ctr, Leicester LE1 7EA, Leics, England.
[Eliopulos, Louis N.] USN, Forens Consultant Div, Criminal Invest Serv, NCIS Headquarters, Washington, DC 20388 USA.
[Brady, Thomas F.] USN, Criminal Invest Serv, Jacksonville, FL 32212 USA.
RP Bond, JW (reprint author), Northamptonshire Police, Sci Support Unit, Wootton Hall, Northampton NN4 0JQ, England.
EM john.bond@northants.police.uk
NR 28
TC 5
Z9 5
U1 2
U2 11
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0022-1198
J9 J FORENSIC SCI
JI J. Forensic Sci.
PD MAR
PY 2011
VL 56
IS 2
BP 506
EP 509
DI 10.1111/j.1556-4029.2010.01680.x
PG 4
WC Medicine, Legal
SC Legal Medicine
GA 725ST
UT WOS:000287667100033
PM 21342194
ER
PT J
AU Haas, DM
Sischy, AC
McCullough, W
Simsiman, AJ
AF Haas, David M.
Sischy, Adam C.
McCullough, William
Simsiman, Amanda J.
TI Maternal ethnicity influences on neonatal respiratory outcomes after
antenatal corticosteroid use for anticipated preterm delivery
SO JOURNAL OF MATERNAL-FETAL & NEONATAL MEDICINE
LA English
DT Article
DE Betamethasone; ethnicity; preterm birth; respiratory distress syndrome
ID DISTRESS-SYNDROME; FILIPINO; PHARMACOGENETICS; POPULATIONS; MORTALITY;
BIRTH; CYP3A
AB Objective. To explore the influence of maternal ethnicity on neonatal outcomes after antenatal corticosteroid administration.
Methods. retrospective review of ethnicity, maternal factors, and neonatal birth outcomes was performed for preterm births at a single institution. Cases were limited to women who received antenatal corticosteroids. The impact of ethnicity on specific neonatal respiratory outcomes and mortality was analyzed by bivariate comparisons and by logistic regression analysis.
Results. Complete ethnicity data were obtained for 548 women. Controlling for gestational age at delivery, diabetes, whether the subject completed a course of steroids, and the dosing of the steroids, logistic regression demonstrated that ethnicity was independently associated with respiratory distress syndrome (compared to Caucasians: African-Americans OR 0.49 (95%% CI 0.29--0.85); Filipinos OR 0.45 (95%% CI 0.21--0.96).
Conclusions. Ethnicity is independently associated with neonatal respiratory outcomes after antenatal corticosteroid use. Perhaps individualized dosing of antenatal corticosteroids is needed to further improve neonatal outcomes.
C1 [Haas, David M.] Indiana Univ Sch Med, Dept OB GYN, Indianapolis, IN USA.
[Sischy, Adam C.; Simsiman, Amanda J.] USN, Med Ctr, Dept OB GYN, San Diego, CA 92152 USA.
[McCullough, William] USN, Med Ctr, Dept Pediat, San Diego, CA 92152 USA.
[McCullough, William] USN, Med Ctr, Dept Radiol, San Diego, CA 92152 USA.
RP Haas, DM (reprint author), 1001 W 10th St,F-5, Indianapolis, IN 46202 USA.
EM dahaas@iupui.edu
FU NIH-NICHD [K23HD055305]; IUPUI Signature Center; Indiana University
Center for Pharmacogenetics and Therapeutics Research in Maternal and
Child Health; Navy Bureau of Medicine and Surgery, Washington, DC
[NMCSD-2009-0033]
FX The authors thank Drs. Daniel T. Shiau, John Richard, Emory A. Fry, and
Michael F. McNamara and Cara Olsen [Ref. 7] for the establishment and
analysis of the original database. This work was supported by grants:
NIH-NICHD K23HD055305 (Haas) and IUPUI Signature Center Grant to
PREGMED, The Indiana University Center for Pharmacogenetics and
Therapeutics Research in Maternal and Child Health. Reprints not
available from authors. The views expressed in this article are those of
the authors and do not reflect the official policy or position of the
Department of the Navy, Department of Defense, or the United States
Government. Three authors are military service members. This work was
prepared as part of their official duties. Title 17 U.S.C. 105 provides
that 'Copyright protection under this title is not available for any
work of the United States Government.' Title 17 U.S.C. 101 defines a
United States Government work as a work prepared by a military service
member as part of that person's official duties. The Chief, Navy Bureau
of Medicine and Surgery, Washington, DC, Clinical Investigation Program
sponsored this study (CIP# NMCSD-2009-0033). The data were presented by
LT Sischy at the 2009 Armed Forces District Meeting in Honolulu, HI
November 2009 as an oral presentation.
NR 20
TC 3
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U1 0
U2 0
PU INFORMA HEALTHCARE
PI LONDON
PA TELEPHONE HOUSE, 69-77 PAUL STREET, LONDON EC2A 4LQ, ENGLAND
SN 1476-7058
J9 J MATERN-FETAL NEO M
JI J. Matern.-Fetal Neonatal Med.
PD MAR
PY 2011
VL 24
IS 3
BP 516
EP 520
DI 10.3109/14767058.2010.506228
PG 5
WC Obstetrics & Gynecology
SC Obstetrics & Gynecology
GA 716SE
UT WOS:000286993000027
PM 20672908
ER
PT J
AU Murrell, GL
AF Murrell, George L.
TI In Reference to Sonic Rhinoplasty
SO LARYNGOSCOPE
LA English
DT Letter
C1 USN Hosp, Dept Otolaryngol, Encinitas, CA USA.
RP Murrell, GL (reprint author), USN Hosp, Dept Otolaryngol, Encinitas, CA USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0023-852X
J9 LARYNGOSCOPE
JI Laryngoscope
PD MAR
PY 2011
VL 121
IS 3
BP 688
EP 688
DI 10.1002/lary.21339
PG 1
WC Medicine, Research & Experimental; Otorhinolaryngology
SC Research & Experimental Medicine; Otorhinolaryngology
GA 727HR
UT WOS:000287789400050
PM 21344451
ER
PT J
AU Griffin, DW
Gonzalez, C
Teigell, N
Petrosky, T
Northup, DE
Lyles, M
AF Griffin, Dale W.
Gonzalez, Cristina
Teigell, Nuria
Petrosky, Terry
Northup, Diana E.
Lyles, Mark
TI Observations on the use of membrane filtration and liquid impingement to
collect airborne microorganisms in various atmospheric environments
SO AEROBIOLOGIA
LA English
DT Article
DE Bacteria; Fungi; Methods; Membrane filtration; Liquid impingement;
Aeromicrobiology; Microbiology
ID SAMPLING TIME; DESERT DUST; BACTERIA; ENUMERATION; AIR; TRANSPORT;
SURVIVAL; VIRUSES; FILTER; SPORES
AB The influence of sample-collection-time on the recovery of culturable airborne microorganisms using a low-flow-rate membrane-filtration unit and a high-flow-rate liquid impinger were investigated. Differences in recoveries were investigated in four different atmospheric environments, one mid-oceanic at an altitude of similar to 10.0 m, one on a mountain top at an altitude of similar to 3,000.0 m, one at similar to 1.0 m altitude in Tallahassee, Florida, and one at similar to 1.0 m above ground in a subterranean-cave. Regarding use of membrane filtration, a common trend was observed: the shorter the collection period, the higher the recovery of culturable bacteria and fungi. These data also demonstrated that lower culturable counts were common in the more remote mid-oceanic and mountain-top atmospheric environments with bacteria, fungi, and total numbers averaging (by sample time or method categories) < 3.0 colony-forming units (CFU) m(-3). At the Florida and subterranean sites, the lowest average count noted was 3.5 bacteria CFU m(-3), and the highest averaged 140.4 total CFU m(-3). When atmospheric temperature allowed use, the high-volume liquid impinger utilized in this study resulted in much higher recoveries, as much as 10x greater in a number of the categories (bacterial, fungal, and total CFU). Together, these data illustrated that (1) the high-volume liquid impinger is clearly superior to membrane filtration for aeromicrobiology studies if start-up costs are not an issue and temperature permits use; (2) although membrane filtration is more cost friendly and has a 'typically' wider operational range, its limits include loss of cell viability with increased sample time and issues with effectively extracting nucleic acids for community-based analyses; (3) the ability to recover culturable microorganisms is limited in 'extreme' atmospheric environments and thus the use of a 'limited' methodology in these environments must be taken into account; and (4) the atmosphere culls, i.e., everything is not everywhere.
C1 [Griffin, Dale W.] US Geol Survey, Geol Discipline, Tallahassee, FL 32303 USA.
[Gonzalez, Cristina; Teigell, Nuria] Univ La Laguna, Univ Inst Trop Dis & Publ Hlth, Tenerife, Canary Islands, Spain.
[Petrosky, Terry] US Geol Survey, Water Resources Discipline, Tallahassee, FL 32303 USA.
[Northup, Diana E.] Univ New Mexico, Albuquerque, NM 87131 USA.
[Lyles, Mark] USN, Res Program Integrat & Mission Dev, Bur Med & Surg, Washington, DC 20372 USA.
RP Griffin, DW (reprint author), US Geol Survey, Geol Discipline, 2639 N Monroe St,Suite A200, Tallahassee, FL 32303 USA.
EM dgriffin@usgs.gov
NR 36
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U1 7
U2 23
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0393-5965
J9 AEROBIOLOGIA
JI Aerobiologia
PD MAR
PY 2011
VL 27
IS 1
BP 25
EP 35
DI 10.1007/s10453-010-9173-z
PG 11
WC Biology; Environmental Sciences
SC Life Sciences & Biomedicine - Other Topics; Environmental Sciences &
Ecology
GA 716AN
UT WOS:000286937300003
ER
PT J
AU Bullock, E
Szkody, P
Mukadam, AS
Borges, BW
Fraga, L
Gansicke, BT
Harrison, TE
Henden, A
Holtzman, J
Howell, SB
Lawson, WA
Levine, S
Plotkin, RM
Seibert, M
Templeton, M
Teske, J
Vrba, FJ
AF Bullock, Eric
Szkody, Paula
Mukadam, Anjum S.
Borges, Bernardo W.
Fraga, Luciano
Gaensicke, Boris T.
Harrison, Thomas E.
Henden, Arne
Holtzman, Jon
Howell, Steve B.
Lawson, Warrick A.
Levine, Stephen
Plotkin, Richard M.
Seibert, Mark
Templeton, Matthew
Teske, Johanna
Vrba, Frederick J.
TI GALEX AND OPTICAL OBSERVATIONS OF GW LIBRAE DURING THE LONG DECLINE FROM
SUPEROUTBURST
SO ASTRONOMICAL JOURNAL
LA English
DT Article
DE novae, cataclysmic variables; stars: individual (GW Lib); stars:
oscillations
ID HUBBLE-SPACE-TELESCOPE; WHITE-DWARF; WZ-SAGITTAE; SPECTROSCOPIC
OBSERVATIONS; TT ARIETIS; NOVAE; PULSATION; OUTBURST; STARS
AB The prototype of accreting, pulsating white dwarfs (GW Lib) underwent a large amplitude dwarf nova outburst in 2007. We used ultraviolet data from Galaxy Evolution Explorer and ground-based optical photometry and spectroscopy to follow GW Lib for three years following this outburst. Several variations are apparent during this interval. The optical shows a superhump modulation in the months following outburst, while a 19 minute quasi-periodic modulation lasting for several months is apparent in the year after outburst. A long timescale (about 4 hr) modulation first appears in the UV a year after outburst and increases in amplitude in the following years. This variation also appears in the optical two years after outburst but is not in phase with the UV. The pre-outburst pulsations are not yet visible after three years, likely indicating the white dwarf has not returned to its quiescent state. The prototype
C1 [Bullock, Eric; Szkody, Paula; Mukadam, Anjum S.; Plotkin, Richard M.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Borges, Bernardo W.] Fundacao Univ Fed Grande Dourados, Fac Ciencias Exatas & Tecnol, BR-79804070 Dourados, Brazil.
[Fraga, Luciano] So Observ Astrophys Res, La Serena, Chile.
[Gaensicke, Boris T.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Harrison, Thomas E.; Holtzman, Jon] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA.
[Henden, Arne; Templeton, Matthew] AAVSO, Cambridge, MA 02138 USA.
[Howell, Steve B.] Natl Opt Astron Observ, Tucson, AZ 85726 USA.
[Lawson, Warrick A.] Univ New S Wales, Australian Def Force Acad, Sch Phys Environm & Math Sci, Canberra, ACT 2600, Australia.
[Levine, Stephen; Vrba, Frederick J.] USN Observ, Flagstaff Stn, Flagstaff, AZ 86001 USA.
[Levine, Stephen] Lowell Observ, Flagstaff, AZ 86001 USA.
[Plotkin, Richard M.] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 XH Amsterdam, Netherlands.
[Seibert, Mark] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA.
[Teske, Johanna] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA.
RP Bullock, E (reprint author), Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA.
EM ericb98@u.washington.edu; szkody@astro.washington.edu;
mukadam@astro.washington.edu; bernardoborges@ufgd.edu.br;
tharriso@nmsu.edu; arne@aavso.org; holtz@nmsu.edu; howell@noao.edu;
w.lawson@adfa.edu.au; sel@lowell.edu; mseibert@obs.carnegiescience.edu;
matthewt@aavso.org; jkteske@email.arizona.edu
RI Gaensicke, Boris/A-9421-2012; 7, INCT/H-6207-2013; Astrofisica,
Inct/H-9455-2013; Borges, Bernardo/O-3483-2014
OI Gaensicke, Boris/0000-0002-2761-3005; Borges,
Bernardo/0000-0002-8590-4564
FU NASA GALEX [NNX08AU43G, NNX09AF87G]; NSF [AST0607840]
FX This research was funded by NASA GALEX grants NNX08AU43G and NNX09AF87G
and NSF grant AST0607840.
NR 41
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U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-6256
EI 1538-3881
J9 ASTRON J
JI Astron. J.
PD MAR
PY 2011
VL 141
IS 3
AR 84
DI 10.1088/0004-6256/141/3/84
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 719TC
UT WOS:000287231000015
ER
PT J
AU Fomalont, E
Johnston, K
Fey, A
Boboltz, D
Oyama, T
Honma, M
AF Fomalont, Ed
Johnston, Kenneth
Fey, Alan
Boboltz, Dave
Oyama, Tamoaki
Honma, Mareki
TI THE POSITION/STRUCTURE STABILITY OF FOUR ICRF2 SOURCES
SO ASTRONOMICAL JOURNAL
LA English
DT Article
DE astrometry; quasars: general; radio continuum: galaxies; surveys
ID RADIO-SOURCES; ASTROMETRY; CALIBRATOR; VLBA
AB Four close radio sources in the International Celestial Reference Frame (ICRF) catalog were observed using phase referencing with the VLBA at 43, 23, and 8.6 GHz, and with VERA at 23 GHz over a one-year period. The goal was to determine the stability of the radio cores and to assess structure effects associated with positions in the ICRF. Although the four sources were compact at 8.6 GHz, the VLBA images at 43 GHz with 0.3 mas resolution showed that all were composed of several components. A component in each source was identified as the radio core using some or all of the following emission properties: compactness, spectral index, location at the end of the extended emission region, and stationary in the sky. Over the observing period, the relative positions between the four radio cores were constant to 0.02 mas, the phase-referencing positional accuracy obtained at 23 and 43 GHz among the sources, suggesting that once a radio core is identified, it remains stationary in the sky to this accuracy. Other radio components in two of the four sources had detectable motion in the radio jet direction. Comparison of the 23 and 43 GHz VLBA images with the VLBA 8.6 GHz images and the ICRF positions suggests that some ICRF positions are dominated by a moving jet component; hence, they can be displaced up to 0.5 mas from the radio core and may also reflect the motion of the jet component. Future astrometric efforts to determine a more accurate quasar reference frame at 23 and 43 GHz and from the VLBI2010 project are discussed, and supporting VLBA or European VLBI Network observations of ICRF sources at 43 GHz are recommended in order to determine the internal structure of the sources. A future collaboration between the radio (ICRF) and the optical frame of GAIA is discussed.
C1 [Fomalont, Ed] Natl Radio Astron Observ, Charlottesville, VA 22903 USA.
[Johnston, Kenneth; Fey, Alan; Boboltz, Dave] USN Observ, Washington, DC 20392 USA.
[Oyama, Tamoaki; Honma, Mareki] Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
RP Fomalont, E (reprint author), Natl Radio Astron Observ, Edgemont Rd, Charlottesville, VA 22903 USA.
EM efomalon@nrao.edu; kenneth.j.johnston@navy.mil; afey@usno.navy.mil;
dboboltz@usno.navy.mil; t.oyama@nao.ac.jp; mareki.honma@nao.ac.jp
NR 21
TC 5
Z9 5
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-6256
J9 ASTRON J
JI Astron. J.
PD MAR
PY 2011
VL 141
IS 3
AR 91
DI 10.1088/0004-6256/141/3/91
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 719TC
UT WOS:000287231000022
ER
PT J
AU Wood, BE
Wu, CC
Howard, RA
Socker, DG
Rouillard, AP
AF Wood, B. E.
Wu, C. -C.
Howard, R. A.
Socker, D. G.
Rouillard, A. P.
TI EMPIRICAL RECONSTRUCTION AND NUMERICAL MODELING OF THE FIRST
GEOEFFECTIVE CORONAL MASS EJECTION OF SOLAR CYCLE 24
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE interplanetary medium; solar wind; Sun: coronal mass ejections (CMEs)
ID MAGNETIC CLOUDS; STEREO MISSION; 1 AU; WIND; HELIOSPHERE; PROPAGATION;
SIMULATION; EVOLUTION; EVENTS; ORIGIN
AB We analyze the kinematics and morphology of a coronal mass ejection (CME) from 2010 April 3, which was responsible for the first significant geomagnetic storm of solar cycle 24. The analysis utilizes coronagraphic and heliospheric images from the two STEREO spacecraft, and coronagraphic images from SOHO/LASCO. Using an empirical three-dimensional (3D) reconstruction technique, we demonstrate that the CME can be reproduced reasonably well at all times with a 3D flux rope shape, but the case for a flux rope being the correct interpretation is not as strong as some events studied with STEREO in the past, given that we are unable to infer a unique orientation for the flux rope. A model with an orientation angle of -80 degrees from the ecliptic plane (i.e., nearly N-S) works best close to the Sun, but a model at 10 degrees (i.e., nearly E-W) works better far from the Sun. Both interpretations require the cross section of the flux rope to be significantly elliptical rather than circular. In addition to our empirical modeling, we also present a fully 3D numerical MHD model of the CME. This physical model appears to effectively reproduce aspects of the shape and kinematics of the CME's leading edge. It is particularly encouraging that the model reproduces the amount of interplanetary deceleration observed for the CME during its journey from the Sun to 1 AU.
C1 [Wood, B. E.; Wu, C. -C.; Howard, R. A.; Socker, D. G.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Rouillard, A. P.] George Mason Univ, Coll Sci, Fairfax, VA 22030 USA.
RP Wood, BE (reprint author), USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
EM brian.wood@nrl.navy.mil; chin-chun.wu@nrl.navy.mil;
russ.howard@nrl.navy.mil; dennis.socker@nrl.navy.mil; arouilla@gmu.edu
FU NASA [NNH10AN83I]; NASA; USAF; ONR
FX This work has been supported by NASA award NNH10AN83I to the Naval
Research Laboratory. The STEREO/SECCHI data are produced by a consortium
of NRL (US), LMSAL (US), NASA/GSFC (US), RAL (UK), UBHAM (UK), MPS
(Germany), CSL (Belgium), IOTA (France), and IAS (France). In addition
to funding by NASA, NRL also received support from the USAF Space Test
Program and ONR. We have also
NR 53
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Z9 36
U1 0
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD MAR 1
PY 2011
VL 729
IS 1
AR 70
DI 10.1088/0004-637X/729/1/70
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 720BN
UT WOS:000287255300070
ER
PT J
AU Mungan, CE
AF Mungan, Carl E.
TI The Bernoulli equation in a moving reference frame
SO EUROPEAN JOURNAL OF PHYSICS
LA English
DT Article
AB Unlike other standard equations in introductory classical mechanics, the Bernoulli equation is not Galilean invariant. The explanation is that, in a reference frame moving with respect to constrictions or obstacles, those surfaces do work on the fluid, constituting an extra term that needs to be included in the work-energy calculation. A quantitative example is presented here for a horizontal tapered pipe. A frame-independent expression for the pressure drop in the pipe is obtained. The concepts discussed in this paper are accessible to introductory undergraduate physics majors.
C1 USN Acad, Dept Phys, Annapolis, MD 21402 USA.
RP Mungan, CE (reprint author), USN Acad, Dept Phys, Annapolis, MD 21402 USA.
EM mungan@usna.edu
NR 8
TC 1
Z9 1
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0143-0807
J9 EUR J PHYS
JI Eur. J. Phys.
PD MAR
PY 2011
VL 32
IS 2
BP 517
EP 520
DI 10.1088/0143-0807/32/2/022
PG 4
WC Education, Scientific Disciplines; Physics, Multidisciplinary
SC Education & Educational Research; Physics
GA 722ZU
UT WOS:000287475700022
ER
PT J
AU Helliwell, TM
Konkowski, DA
AF Helliwell, T. M.
Konkowski, D. A.
TI Classical and quantum properties of a two-sphere singularity
SO GENERAL RELATIVITY AND GRAVITATION
LA English
DT Article
DE Singularity; Quantum singularity; Essentially self-adjoint
ID QUASI-REGULAR SPACETIMES; POWER-LAW SPACETIMES; TIMES
AB Recently Bohmer and Lobo have shown that a metric due to Florides, which has been used as an interior Schwarzschild solution, can be extended to reveal a classical singularity that has the form of a two-sphere. Here the singularity is shown to be a naked scalar curvature singularity that is both timelike and gravitationally weak. It is also shown to be a quantum singularity because the Klein-Gordon operator associated with quantum mechanical particles approaching the singularity is not essentially self-adjoint.
C1 [Konkowski, D. A.] USN Acad, Dept Math, Annapolis, MD 21402 USA.
[Helliwell, T. M.] Harvey Mudd Coll, Dept Phys, Claremont, CA 91711 USA.
RP Konkowski, DA (reprint author), USN Acad, Dept Math, Annapolis, MD 21402 USA.
EM helliwell@hmc.edu; dak@usna.edu
NR 25
TC 2
Z9 2
U1 0
U2 1
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0001-7701
J9 GEN RELAT GRAVIT
JI Gen. Relativ. Gravit.
PD MAR
PY 2011
VL 43
IS 3
BP 695
EP 701
DI 10.1007/s10714-010-1099-9
PG 7
WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles
& Fields
SC Astronomy & Astrophysics; Physics
GA 722TU
UT WOS:000287458700001
ER
PT J
AU Banerjee, A
Person, M
Hofstra, A
Sweetkind, D
Cohen, D
Sabin, A
Unruh, J
Zyvoloski, G
Gable, CW
Crossey, L
Karlstrom, K
AF Banerjee, Amlan
Person, Mark
Hofstra, Albert
Sweetkind, Donald
Cohen, Denis
Sabin, Andrew
Unruh, Jeff
Zyvoloski, George
Gable, Carl W.
Crossey, Laura
Karlstrom, Karl
TI Deep permeable fault-controlled helium transport and limited mantle flux
in two extensional geothermal systems in the Great Basin, United States
SO GEOLOGY
LA English
DT Article
ID NEVADA; CALIFORNIA; TECTONICS; ISOTOPES; BEOWAWE; DEPOSIT; ORIGIN;
FLUIDS; AREA; FLOW
AB This study assesses the relative importance of deeply circulating meteoric water and direct mantle fluid inputs on near-surface He-3/He-4 anomalies reported at the Coso and Beowawe geothermal fields of the western United States. The depth of meteoric fluid circulation is a critical factor that controls the temperature, extent of fluid-rock isotope exchange, and mixing with deeply sourced fluids containing mantle volatiles. The influence of mantle fluid flux on the reported helium anomalies appears to be negligible in both systems. This study illustrates the importance of deeply penetrating permeable fault zones (10(-12) to 10(-15) m(2)) in focusing groundwater and mantle volatiles with high He-3/He-4 ratios to shallow crustal levels. These continental geothermal systems are driven by free convection.
C1 [Banerjee, Amlan; Person, Mark] New Mexico Inst Min & Technol, Dept Earth & Environm Sci, Socorro, NM 87801 USA.
[Hofstra, Albert; Sweetkind, Donald] US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA.
[Cohen, Denis] Iowa State Univ, Dept Geol & Atmospher Sci, Ames, IA 50011 USA.
[Sabin, Andrew] USN, Geothermal Program Off, China Lake, CA 93555 USA.
[Unruh, Jeff] William Lettis & Associates, Walnut Creek, CA 94596 USA.
[Zyvoloski, George; Gable, Carl W.] Los Alamos Natl Lab, Computat Earth Sci Grp, Los Alamos, NM 87545 USA.
[Crossey, Laura; Karlstrom, Karl] Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA.
RP Banerjee, A (reprint author), New Mexico Inst Min & Technol, Dept Earth & Environm Sci, Socorro, NM 87801 USA.
EM mperson@nmt.edu
RI Gable, Carl/B-4689-2011; Crossey, Laura/C-2033-2008; Cohen,
Denis/P-2015-2016; Banerjee, Amlan/P-9658-2016;
OI Gable, Carl/0000-0001-7063-0815; Crossey, Laura/0000-0001-6237-8023;
Cohen, Denis/0000-0002-8262-9798; Banerjee, Amlan/0000-0002-2065-1391;
Sweetkind, Donald/0000-0003-0892-4796
NR 21
TC 7
Z9 7
U1 0
U2 20
PU GEOLOGICAL SOC AMER, INC
PI BOULDER
PA PO BOX 9140, BOULDER, CO 80301-9140 USA
SN 0091-7613
J9 GEOLOGY
JI Geology
PD MAR
PY 2011
VL 39
IS 3
BP 195
EP 198
DI 10.1130/G31557.1
PG 4
WC Geology
SC Geology
GA 721SI
UT WOS:000287374900003
ER
PT J
AU Simeonov, JA
Calantoni, J
AF Simeonov, Julian A.
Calantoni, Joseph
TI A pressure boundary integral method for direct fluid-particle
simulations on Cartesian grids
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Particle-laden flow; Direct numerical simulations; Discontinuous
pressure Poisson equation; Boundary integral method
ID PARTICULATE FLOWS; EQUATIONS
AB We consider a new Cartesian grid method for direct numerical simulations of fully coupled interaction of incompressible flow and spherical particles, based on a discontinuous extension of the pressure Poisson equation (PPE) across particle boundaries. We give a complete mathematical description of the boundary-integral treatment of the discontinuous PPE that includes the derivation of a new pressure boundary condition for accelerating boundaries and the solution of the system of boundary integral equations using spherical harmonics expansions. The model was validated with the standard test for finite Reynolds number flow around a sphere and with a novel test using the analytical solution for the Stokes flow past two adjacent spheres moving with the same velocity. The model capability and numerical efficiency was demonstrated with simulations for the collective settling of groups of 64-512 particles. Published by Elsevier Inc.
C1 [Simeonov, Julian A.; Calantoni, Joseph] USN, Marine Geosci Div, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Simeonov, JA (reprint author), USN, Marine Geosci Div, Res Lab, Code 7434,Bldg 1005, Stennis Space Ctr, MS 39529 USA.
EM simeonov@nrlssc.navy.mil
OI Simeonov, Julian/0000-0002-7554-071X
FU ASEE; Office of Naval Research [PE#61153N]; NAVY DSRC; ERDC DSRC
FX Julian Simeonov was supported through the ASEE postdoctoral fellowship
program. Joseph Calantoni was supported under base funding to the Naval
Research Laboratory from the Office of Naval Research (PE#61153N). This
work was supported in part by a grant of computer time from the DoD High
Performance Computing Modernization Program at the NAVY DSRC and the
ERDC DSRC. We thank the two anonymous reviewers for helpful comments.
NR 22
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Z9 4
U1 1
U2 9
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD MAR 1
PY 2011
VL 230
IS 5
BP 1749
EP 1765
DI 10.1016/j.jcp.2010.11.027
PG 17
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 717OS
UT WOS:000287057900002
ER
PT J
AU Vega, V
Huynh, UN
Holmes, J
DeChellis, J
Stoyanov, P
Piatkowski, D
Lee, EW
Ogren, J
Drusina, N
Es-Said, OS
AF Vega, V.
Huynh, U. Nguyen
Holmes, J.
DeChellis, J.
Stoyanov, P.
Piatkowski, D.
Lee, E. W.
Ogren, J.
Drusina, N.
Es-Said, O. S.
TI Analysis of Heat Effects on Marine Corps AM2 Mat Mechanical Properties
SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
LA English
DT Article
DE AM2 mats; STOVL; 6061-T6 aluminum
ID AL 6061-T6
AB Navy AM2 mats are used as portable aircraft landing platforms for the Short Take-off/Vertical Landing (STOVL) aircraft operations. This investigation presents the study performed to determine whether the surface discoloration is a precursor to degradation in the mechanical property of the AM2 mat material. The red discoloration on the mat surfaces had a clear correlation with the decrease in yield strength, ultimate strength, and hardness properties.
C1 [Vega, V.] Northrop Grumman Corp, El Segundo, CA 90425 USA.
[Huynh, U. Nguyen; Holmes, J.; DeChellis, J.; Stoyanov, P.; Ogren, J.; Es-Said, O. S.] Loyola Marymount Univ, Dept Mech Engn, Los Angeles, CA 90045 USA.
[Piatkowski, D.] Naval Air Syst Command, Naval Air Warfare Ctr, Div Aircraft, Lakehurst, NJ 08733 USA.
[Lee, E. W.] USN, Naval Air Warfare Ctr, Air Syst Command, Patuxent River, MD 20670 USA.
[Drusina, N.] Nortrop Grumman Corp, Redondo Beach, CA 90278 USA.
RP Vega, V (reprint author), Northrop Grumman Corp, 1 Hornet Way, El Segundo, CA 90425 USA.
EM oessaid@lmu.edu
FU National Science Foundation, NSF [EEC-0353668]
FX This study was funded by the National Science Foundation, NSF, Grant No.
EEC-0353668, Research Experience for Undergraduate (REU) site.
NR 7
TC 0
Z9 0
U1 3
U2 5
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1059-9495
J9 J MATER ENG PERFORM
JI J. Mater. Eng. Perform.
PD MAR
PY 2011
VL 20
IS 2
BP 257
EP 264
DI 10.1007/s11665-010-9669-2
PG 8
WC Materials Science, Multidisciplinary
SC Materials Science
GA 719ZL
UT WOS:000287249900015
ER
PT J
AU Schroeder, JW
Vezina, LG
AF Schroeder, Jason W.
Vezina, L. Gilbert
TI Pediatric sellar and suprasellar lesions
SO PEDIATRIC RADIOLOGY
LA English
DT Review
DE Pediatrics; Sella turcica; Suprasellar; Tumors
ID LANGERHANS CELL HISTIOCYTOSIS; OPTIC PATHWAY GLIOMAS; RATHKES CLEFT
CYSTS; HEAD DOLL SYNDROME; IMAGING FINDINGS; ARACHNOID CYST; LYMPHOCYTIC
HYPOPHYSITIS; HYPOTHALAMIC HAMARTOMAS; PILOMYXOID ASTROCYTOMA;
DIENCEPHALIC SYNDROME
AB Masses arising in the sella turcica and the suprasellar region are common in children. The type and frequency of the various lesions encountered in childhood differ from the adult presentation. This article reviews the embryology of the pituitary gland and its normal appearance in childhood as well as the imaging and clinical findings of the common and some of the uncommon lesions arising in the sella turcica, the pituitary stalk, the suprasellar cistern and the lower third ventricle in the pediatric population.
C1 [Schroeder, Jason W.; Vezina, L. Gilbert] Childrens Natl Med Ctr, Dept Diagnost Imaging & Radiol, Washington, DC 20010 USA.
[Schroeder, Jason W.] USN, Washington, DC USA.
RP Vezina, LG (reprint author), Childrens Natl Med Ctr, Dept Diagnost Imaging & Radiol, 111 Michigan Ave NW, Washington, DC 20010 USA.
EM gvezina@cnmc.org
FU NIH [2U10 CA098543-08]
FX This work was supported by NIH grant 2U10 CA098543-08.
NR 75
TC 5
Z9 5
U1 0
U2 5
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0301-0449
J9 PEDIATR RADIOL
JI Pediatr. Radiol.
PD MAR
PY 2011
VL 41
IS 3
BP 287
EP 298
DI 10.1007/s00247-010-1968-0
PG 12
WC Pediatrics; Radiology, Nuclear Medicine & Medical Imaging
SC Pediatrics; Radiology, Nuclear Medicine & Medical Imaging
GA 723IL
UT WOS:000287500000001
PM 21267556
ER
PT J
AU Plant, NG
Holland, KT
AF Plant, Nathaniel G.
Holland, K. Todd
TI Prediction and assimilation of surf-zone processes using a Bayesian
network Part II: Inverse models
SO COASTAL ENGINEERING
LA English
DT Article
DE Wave height; Bathymetry; Field data; Duck94; Parameter estimation
ID 3RD-GENERATION WAVE MODEL; COASTAL REGIONS; NEARSHORE; TRANSFORMATION;
VERIFICATION; DISSIPATION; BATHYMETRY; VALIDATION; FORECASTS; BEHAVIOR
AB A Bayesian network model has been developed to simulate a relatively simple problem of wave propagation in the surf zone (detailed in Part I). Here, we demonstrate that this Bayesian model can provide both inverse modeling and data-assimilation solutions for predicting offshore wave heights and depth estimates given limited wave-height and depth information from an onshore location. The inverse method is extended to allow data assimilation using observational inputs that are not compatible with deterministic solutions of the problem. These inputs include sand bar positions (instead of bathymetry) and estimates of the intensity of wave breaking (instead of wave-height observations). Our results indicate that wave breaking information is essential to reduce prediction errors. In many practical situations, this information could be provided from a shore-based observer or from remote-sensing systems. We show that various combinations of the assimilated inputs significantly reduce the uncertainty in the estimates of water depths and wave heights in the model domain. Application of the Bayesian network model to new field data demonstrated significant predictive skill (R(2) = 0.7) for the inverse estimate of a month-long time series of offshore wave heights. The Bayesian inverse results include uncertainty estimates that were shown to be most accurate when given uncertainty in the inputs (e.g., depth and tuning parameters). Furthermore, the inverse modeling was extended to directly estimate tuning parameters associated with the underlying wave-process model. The inverse estimates of the model parameters not only showed an offshore wave height dependence consistent with results of previous studies but the uncertainty estimates of the tuning parameters also explain previously reported variations in the model parameters. Published by Elsevier B.V.
C1 [Plant, Nathaniel G.] US Geol Survey, St Petersburg, FL 33701 USA.
[Holland, K. Todd] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Plant, NG (reprint author), US Geol Survey, 600 4th St S, St Petersburg, FL 33701 USA.
EM nplant@usgs.gov; todd.holland@nrlssc.navy.mil
RI Holland, K. Todd/A-7673-2011;
OI Holland, K. Todd/0000-0002-4601-6097; Plant,
Nathaniel/0000-0002-5703-5672
FU USGS Coastal Marine Geology; Office of Naval Research [0602435N,
N0001409IP20080]; National Science Foundation
FX This work was supported by USGS Coastal Marine Geology (National
assessment of coastal change hazards project) and the Office of Naval
Research (PE Number: 0602435N for KTH and N0001409IP20080 for NGP). We
are indebted to the researchers at the Field Research Facility (FRF,
Duck, NC) who collected the long time series of bathymetry and wave
conditions used in our models. This debt is extended also to both the
FRF researchers and to Drs. Guza, Gallagher, Herbers, Raubenheimer, and
Elgar who collected the Duck94 field observation used to test our
predictions. That effort was supported by the Office of Naval Research
and the National Science Foundation. We appreciate the thoughtful and
constructive reviews provided by P. Howd, A. Reniers, and B. Lidz.
NR 24
TC 14
Z9 15
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3839
J9 COAST ENG
JI Coast. Eng.
PD MAR
PY 2011
VL 58
IS 3
BP 256
EP 266
DI 10.1016/j.coastaleng.2010.11.002
PG 11
WC Engineering, Civil; Engineering, Ocean
SC Engineering
GA 718GX
UT WOS:000287110200004
ER
PT J
AU Jackson, M
Shukla, A
AF Jackson, Matthew
Shukla, Arun
TI Performance of sandwich composites subjected to sequential impact and
air blast loading
SO COMPOSITES PART B-ENGINEERING
LA English
DT Article
DE Layered structures; Debonding; Impact behavior; Blast loading
ID PANELS; BEHAVIOR
AB An experimental study has been conducted to examine the effects of two different types of impact damage on the blast performance of sandwich composites. Sandwich composite specimens were subjected to impact by either a high velocity projectile or a low velocity drop weight. After impact, a secondary blast loading experiment was performed on the same specimens to evaluate the effects of the impact damage on the blast performance of the sandwich. Controlled blast loading was imparted using a shock tube apparatus while pressure data and high speed images of the dynamic event were captured. The experimental results showed impact damage from high velocity projectiles was most prominent on the exit face sheet of the sandwich specimens wherein damage to the core and impact face sheet, in the form of a hole, was minimal in comparison. Damage created by low velocity drop weights was concentrated on the impact face sheet and within the core adjacent to the impact face sheet. Low velocity impacts also generated de-bonding between the impact face sheet and core. Shear cracking in the core was the dominant effect of all blast loading.
Although the specimens that had been struck by high velocity projectiles absorbed substantially more energy during impact experiments than those impacted by low velocity drop weights the damage created by low velocity impacts had the greatest detrimental effect on the blast performance of the sandwich composites. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Shukla, Arun] Univ Rhode Isl, Dynam Photomech Lab, Dept Mech Ind & Syst Engn, Kingston, RI 02881 USA.
[Jackson, Matthew] USN, Undersea Warfare Ctr, Newport, RI 02841 USA.
RP Shukla, A (reprint author), Univ Rhode Isl, Dynam Photomech Lab, Dept Mech Ind & Syst Engn, Kingston, RI 02881 USA.
EM shuklaa@egr.uri.edu
FU Office of Naval Research [N000140410268]; Department of Homeland
Security [2008-ST-061-ED000]
FX The authors acknowledge the financial support provided by the Office of
Naval Research (Dr. Yapa D.S. Rajapakse) under Grant # N000140410268 and
the Department of Homeland Security under the Cooperative Agreement #
2008-ST-061-ED000. Specimens used in this study were provided by The
Material Science Corporation.
NR 15
TC 21
Z9 23
U1 1
U2 18
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1359-8368
J9 COMPOS PART B-ENG
JI Compos. Pt. B-Eng.
PD MAR
PY 2011
VL 42
IS 2
BP 155
EP 166
DI 10.1016/j.compositesb.2010.09.005
PG 12
WC Engineering, Multidisciplinary; Materials Science, Composites
SC Engineering; Materials Science
GA 722LF
UT WOS:000287433000005
ER
PT J
AU Cotton, NJ
Wilamowski, BM
AF Cotton, Nicholas J.
Wilamowski, Bogdan M.
TI Compensation of Nonlinearities Using Neural Networks Implemented on
Inexpensive Microcontrollers
SO IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
LA English
DT Article
DE Embedded; microcontroller; neural networks; nonlinear sensor
compensation
ID SENSOR LINEARIZATION; MOTOR DRIVE; SYSTEMS
AB This paper describes a method of linearizing the nonlinear characteristics of many sensors and devices using an embedded neural network. The neuron-by-neuron process was developed in assembly language to allow the fastest and shortest code on the embedded system. The embedded neural network also requires an accurate approximation for hyperbolic tangent to be used as the neuron activation function. The proposed method allows for complex neural networks with very powerful architectures to be embedded on an inexpensive 8-b microcontroller. This process was then demonstrated on several examples, including a robotic arm kinematics problem.
C1 [Cotton, Nicholas J.] Auburn Univ, Dept Elect & Comp Engn, Auburn, AL 36849 USA.
[Wilamowski, Bogdan M.] Auburn Univ, Alabama Micro Nano Sci & Technol Ctr, Auburn, AL 36849 USA.
RP Cotton, NJ (reprint author), USN, Sea Syst Command, Panama City, FL 32407 USA.
EM cottonj@ieee.org; wilam@ieee.org
NR 23
TC 27
Z9 27
U1 2
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0278-0046
EI 1557-9948
J9 IEEE T IND ELECTRON
JI IEEE Trans. Ind. Electron.
PD MAR
PY 2011
VL 58
IS 3
BP 733
EP 740
DI 10.1109/TIE.2010.2098377
PG 8
WC Automation & Control Systems; Engineering, Electrical & Electronic;
Instruments & Instrumentation
SC Automation & Control Systems; Engineering; Instruments & Instrumentation
GA 721AM
UT WOS:000287323800003
ER
PT J
AU Tait, GB
Slocum, MB
AF Tait, Gregory B.
Slocum, Michael B.
TI Random-Walk Technique for Measuring the Electromagnetic Environment in
Electrically Large Reflective Spaces
SO IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
LA English
DT Article
DE Complex cavities; electromagnetic measurements; reverberation chamber
ID MODE-STIRRED CHAMBER; REVERBERATION CHAMBER; STATISTICAL-MODEL
AB An efficient and accurate "walk-around" technique is presented for making on-site measurements of the electromagnetic environment in enclosed reflective spaces found in ship below-deck compartments, aircraft cabins and bays, and buildings such as hangars and prefabricated metal storage facilities. To assess the potentially disruptive or harmful effects to electronics equipment or ordnance from accumulated radio frequency emissions, these reverberant spaces are characterized as overmoded complex cavities, and a statistical analysis is exercised to obtain important information about maximum and average power densities in the space and their associated uncertainties. This new technique utilizes lightweight and portable test equipment, and is particularly well suited for measurements in field-operational spaces, where the use of more conventional techniques has been proven to be very difficult due to severe constraints on time, working volume, equipment size and weight, and test costs. The efficiency and accuracy of the walk-around technique are demonstrated in this paper by comparison to measurements obtained by the more conventional techniques in a large reverberation chamber. Results indicate a substantial reduction in test time, a vast improvement in the ease of test execution that can be realized at remote sites, and equal or better accuracy in the characterization of the electromagnetic environment.
C1 [Tait, Gregory B.; Slocum, Michael B.] USN, Surface Warfare Ctr Dahlgren, Electromagnet & Sensor Syst Dept, Assessment & Evaluat Branch Q52 E3, Dahlgren, VA 22448 USA.
RP Tait, GB (reprint author), USN, Surface Warfare Ctr Dahlgren, Electromagnet & Sensor Syst Dept, Assessment & Evaluat Branch Q52 E3, Dahlgren, VA 22448 USA.
EM gregory.tait@navy.mil
NR 22
TC 0
Z9 0
U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9456
J9 IEEE T INSTRUM MEAS
JI IEEE Trans. Instrum. Meas.
PD MAR
PY 2011
VL 60
IS 3
BP 1003
EP 1009
DI 10.1109/TIM.2010.2064930
PG 7
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 717YP
UT WOS:000287085500035
ER
PT J
AU Love, CT
AF Love, Corey T.
TI Thermomechanical analysis and durability of commercial micro-porous
polymer Li-ion battery separators
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Polymer separator; Lithium ion battery; Thermomechanical analysis;
Durability; DMA
ID X-RAY-DIFFRACTION; POLYETHYLENE FILMS; CELLS
AB Static and dynamic thermomechanical analysis was performed with a dynamic mechanical analyzer (DMA) to identify thermal and mechanical transitions for commercially available polymer separators under mechanical loading. Clear transitions in deformation mode were observed at elevated temperatures. These transitions identified the onset of separator "shutdown" which occurred at temperatures below the polymer melting point. Mechanical loading direction was critical to the overall integrity of the separator. Anisotropic separators (Celgard 2320, 2400 and 2500) were mechanically limited when pulled in tensile in the transverse direction. The anisotropy of these separators is a result of the dry technique used to manufacture the micro-porous membranes. Separators prepared using the wet technique (Entek Gold LP) behaved more uniformly, or biaxially, where all mechanical properties were nearly identical within the separator plane. The information provided by the DMA can also be useful for predicting the long-term durability of polymer separators in lithium-ion batteries exposed to electrolyte (solvent and salt), thermal fluctuations and electrochemical cycling. Small losses in mechanical integrity were observed for separators exposed to the various immersion environments over the 4-week immersion time. Published by Elsevier B.V.
C1 USN, Res Lab, Alternat Energy Sect, Washington, DC 20375 USA.
RP Love, CT (reprint author), USN, Res Lab, Alternat Energy Sect, Code 6113,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM corey.love@nrl.navy.mil
FU Naval Research Laboratory
FX Funding for this work was provided by the Jerome Karle Fellowship at the
Naval Research Laboratory. The author acknowledges Celgard LLC and Entek
Membranes LLC for donating the sample materials for testing. The author
would like to thank Dr. James Thomas of NRL for technical expertise and
use of DMA instrument and Dr. Karen Swider-Lyons of NRL for helpful
discussions.
NR 22
TC 29
Z9 29
U1 2
U2 69
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
J9 J POWER SOURCES
JI J. Power Sources
PD MAR 1
PY 2011
VL 196
IS 5
BP 2905
EP 2912
DI 10.1016/j.jpowsour.2010.10.083
PG 8
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 712ZP
UT WOS:000286705100068
ER
PT J
AU Shen, YT
Hess, DE
AF Shen, Young T.
Hess, David E.
TI A Method to Scale the Roughness of Submarine Nonskid Coatings on a
Free-Running Model for Maneuvering Experiments
SO JOURNAL OF SHIP RESEARCH
LA English
DT Article
DE submersibles; coatings; model testing; maneuvering
AB A portion of the upper-deck surface of a submarine can be coated with roughness for crew safety when walking on the hull. The roughness factor for the nonskid coating on a full-scale submarine is very large, on the order of 400 under typical ship operation conditions. Boundary layer development, flow separation, cross-flow drag, hull surface pressure, and ship motion may be modified by the presence of this coating during turning maneuvers. Free-running model (FRM) submarines are routinely employed by the Naval Surface Warfare Center to characterize submarine maneuvering behavior, and the application of an appropriately sized nonskid coating to the model is required for fidelity of model maneuvering experiments. Three methods to scale the coating have been investigated, and conventional geometric scaling and wall shear velocity scaling methods were found to be inadequate. A new scaling method termed the momentum boundary layer thickness (MBLT) method has been developed. This method relates the cross-flow drag on the FRM with that on the full-scale vehicle. Boundary layer velocity profiles on an axisymmetric body at model and full-scale Reynolds numbers have been computed by a RANS code. Velocity profiles encountered by the full-scale nonskid coating are found to match well with those developed on the FRM with roughness sized using the MBLT method. The scaled roughness size compares favorably with two empirically determined roughness sizes that have been previously used on FRMs that have shown good correlation with full-scale maneuvering data.
C1 [Shen, Young T.; Hess, David E.] USN, Ctr Surface Warfare, Bethesda, MD 20817 USA.
RP Shen, YT (reprint author), USN, Ctr Surface Warfare, Code 5700,9500 MacArthur Blvd, Bethesda, MD 20817 USA.
FU Office of Naval Research
FX This work is supported by the Office of Naval Research Turbulence &
Stratified Wakes Program. The program officer is Dr. Ronald D. Joslin,
Code 331. Special thanks are due to Mr. Sam Cubbage for full-scale
nonskid coating measurements and valuable technical discussions and to
Dr C. I. Yang for RANS calculations. Valuable technical comments and
suggestions by Mssrs. Thomas Moran and Kurt Junghans are greatly
appreciated. We would like to express our special thanks to Dr. Edward
Ammeen for his continuous encouragement, guidance, discussions, and
support. We would also like to thank Dr. John Barkyoumb for his support
from within the ILIR program.
NR 9
TC 2
Z9 2
U1 2
U2 3
PU SOC NAVAL ARCH MARINE ENG
PI JERSEY CITY
PA 601 PAVONIA AVENUE, JERSEY CITY, NJ 07306 USA
SN 0022-4502
J9 J SHIP RES
JI J. Ship Res.
PD MAR
PY 2011
VL 55
IS 1
BP 64
EP 69
PG 6
WC Engineering, Marine; Engineering, Civil
SC Engineering
GA 722XQ
UT WOS:000287469000005
ER
PT J
AU Garrett, RK
Anderson, S
Baron, NT
Moreland, JD
AF Garrett, Robert K., Jr.
Anderson, Steve
Baron, Neil T.
Moreland, James D., Jr.
TI Managing the Interstitials, a System of Systems Framework Suited for the
Ballistic Missile Defense System
SO SYSTEMS ENGINEERING
LA English
DT Article
DE System of Systems; complexity; Ballistic Missile Defense; architecture;
modeling and simulation
ID TECHNOLOGY
AB Recent engineering experiences with the Missile Defense Agency (MDA) Ballistic Missile Defense System (BMDS) highlight the need to analyze the BMDS System of Systems (SoS) including the numerous potential interactions between independently developed elements of the system. The term "interstitials" is used to define the domain of interfaces, interoperability, and integration between constituent systems in an SoS. The authors feel that this domain, at an SoS level, has received insufficient attention within systems engineering literature. The BMDS represents a challenging SoS case study as many of its initial elements were assembled from existing programs of record. The elements tend to perform as designed but their performance measures may not be consistent with the higher level SoS requirements. One of the BMDS challenges is interoperability, to focus the independent elements to interact in a number of ways, either subtle or overt, for a predictable and sustainable national capability. New capabilities desired by national leadership may involve modifications to kill chains, Command and Control (C2) constructs, improved coordination, and performance. These capabilities must be realized through modifications to programs of record and integration across elements of the system that have their own independent programmatic momentum. A challenge of SoS Engineering is to objectively evaluate competing solutions and assess the technical viability of tradeoff options. This paper will present a multifaceted technical approach for integrating a complex, adaptive SoS to achieve a functional capability. Architectural frameworks will be explored, a mathematical technique utilizing graph theory will be introduced, adjuncts to more traditional modeling and simulation techniques such as agent based modeling will be explored, and, finally, newly developed technical and managerial metrics to describe design maturity will be introduced. A theater BMDS construct will be used as a representative set of elements together with the interstitials representing the integration domain. Increased attention to the interstitial space of the overarching BMDS SoS construct and applying appropriate technical rigor and engineering due diligence with these added tools should greatly assist the BMDS in realizing its potential. (C) 2010 Wiley Periodicals, Inc. Syst Eng 14: 87-109, 2011
C1 [Garrett, Robert K., Jr.; Anderson, Steve; Baron, Neil T.; Moreland, James D., Jr.] USN, Ctr Surface Warfare, Dahlgren Div NSWCDD, Dahlgren, VA 22448 USA.
RP Garrett, RK (reprint author), USN, Ctr Surface Warfare, Dahlgren Div NSWCDD, 6138 Norc Ave,Bldg 221,Suite 314, Dahlgren, VA 22448 USA.
EM DLGR_NSWC_G25@navy.mil; DLGR_NSWC_K@Navy.mil; DLGR_NSWC_W@navy.mil;
DLGR_NSWC_W@Navy.mil
NR 42
TC 15
Z9 16
U1 3
U2 20
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1098-1241
J9 SYSTEMS ENG
JI Syst. Eng.
PD SPR
PY 2011
VL 14
IS 1
BP 87
EP 109
DI 10.1002/sys.20173
PG 23
WC Engineering, Industrial; Operations Research & Management Science
SC Engineering; Operations Research & Management Science
GA 712EP
UT WOS:000286647800006
ER
PT J
AU Lindley, B
Wang, Q
Zhang, TY
AF Lindley, Brandon
Wang, Qi
Zhang, Tianyu
TI A MULTICOMPONENT MODEL FOR BIOFILM-DRUG INTERACTION
SO DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES B
LA English
DT Article
DE Biofilms; Multicomponent fluids; Phase-field model; Steady states;
Linearized Stability; Nonlinear Dynamics
ID MIXED-CULTURE BIOFILM; PHASE-FIELD MODELS; NONUNIFORM SYSTEM; FREE
ENERGY; SIMULATIONS; STRESS; GROWTH; FLOW
AB We develop a tri-component model for the biofilm and solvent mixture, in which the extracellular polymeric substance (EPS) network, bacteria and effective solvent consisting of the solvent, nutrient, drugs etc. are modeled explicitly. The tri-component mixture is assumed incompressible as a whole while inter-component mixing, dissipation, and conversion are allowed. A linear stability analysis is conducted on constant equilibria revealing up to two unstable modes corresponding to possible bacterial growth induced by the bacterial and EPS production and dependent upon the regime of the model parameters. A 1-D transient simulation is carried out to investigate the non-linear dynamics of the EPS network, bacteria distribution, drug and nutrient distribution in a channel with and without shear. Finally, the transient biofilm dynamics are studied with respect to a host of diffusive properties of the drug and nutrient present in the biofilm.
C1 [Lindley, Brandon] USN, Res Lab, Washington, DC 20375 USA.
[Wang, Qi] Univ S Carolina, Dept Math, Interdisciplinary Math Inst, Columbia, SC 29208 USA.
[Wang, Qi] Univ S Carolina, NanoCtr USC, Columbia, SC 29208 USA.
[Zhang, Tianyu] Montana State Univ, Dept Math Sci, Bozeman, MT 59717 USA.
RP Lindley, B (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM blindley@nlsleah.nrl.navy.mil; qwang@math.sc.edu; zhang@math.montana.edu
NR 29
TC 11
Z9 11
U1 0
U2 6
PU AMER INST MATHEMATICAL SCIENCES
PI SPRINGFIELD
PA PO BOX 2604, SPRINGFIELD, MO 65801-2604 USA
SN 1531-3492
J9 DISCRETE CONT DYN-B
JI Discrete Contin. Dyn. Syst.-Ser. B
PD MAR
PY 2011
VL 15
IS 2
BP 417
EP 456
DI 10.3934/dcdsb.2011.15.417
PG 40
WC Mathematics, Applied
SC Mathematics
GA 701CE
UT WOS:000285791100008
ER
PT J
AU Crainiceanu, A
Linga, P
Machanavajjhala, A
Gehrke, J
Shanmugasundaram, J
AF Crainiceanu, Adina
Linga, Prakash
Machanavajjhala, Ashwin
Gehrke, Johannes
Shanmugasundaram, Jayavel
TI Load Balancing and Range Queries in P2P Systems Using P-Ring
SO ACM TRANSACTIONS ON INTERNET TECHNOLOGY
LA English
DT Article
DE Algorithms; Management; Performance; Peer-to-peer systems; range
queries; load balancing; indexing
AB In peer-to-peer (P2P) systems, computers from around the globe share data and can participate in distributed computation. P2P became famous, and infamous, due to file-sharing systems like Napster. However, the scalability and robustness of these systems make them appealing to a wide range of applications.
This article introduces P-Ring, a new peer-to-peer index structure. P-Ring is fully distributed, fault tolerant, and provides load balancing and logarithmic search performance while supporting both equality and range queries. Our theoretical analysis as well as experimental results, obtained both in a simulated environment and on PlanetLab, show the performance of our system.
C1 [Crainiceanu, Adina] USN Acad, Annapolis, MD 21402 USA.
[Gehrke, Johannes] Cornell Univ, Dept Comp Sci, Ithaca, NY 14853 USA.
RP Crainiceanu, A (reprint author), USN Acad, 121 Blake Rd, Annapolis, MD 21402 USA.
EM adina@usna.edu; plinga@mokafive.com; mvnak@yahoo.inc.com;
johannes@cs.cornell.edu; jayavel.shanmugasundaram@acm.org
FU NSF [0133481]; AFOSR [F49620-02-1-0233, FA9550-10-1-0202]; Naval Academy
Research Council; ONR [N0001406WR20137, N0001408WR40063]; Research
Council of Norway; New York State Foundation for Science, Technology,
and Innovation [C050061]
FX This material is based upon work supported by NSF Grant 0133481, by
AFOSR under Grants F49620-02-1-0233 and FA9550-10-1-0202, by the Naval
Academy Research Council and ONR under Grants N0001406WR20137 and
N0001408WR40063, by the iAd Project funded by the Research Council of
Norway, and by the New York State Foundation for Science, Technology,
and Innovation under Agreement C050061. Any opinions, findings, and
conclusions or recommendations expressed in this material are those of
the authors and do not necessarily reflect the views of the sponsors.
NR 29
TC 5
Z9 5
U1 0
U2 1
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 2 PENN PLAZA, STE 701, NEW YORK, NY 10121-0701 USA
SN 1533-5399
J9 ACM T INTERNET TECHN
JI ACM Trans. Internet. Technol.
PD MAR
PY 2011
VL 10
IS 4
AR 16
DI 10.1145/1944339.1944343
PG 30
WC Computer Science, Information Systems; Computer Science, Software
Engineering
SC Computer Science
GA 741WA
UT WOS:000288895000004
ER
PT J
AU Bruckman, MA
Soto, CM
McDowell, H
Liu, JL
Ratna, BR
Korpany, KV
Zahr, OK
Blum, AS
AF Bruckman, Michael A.
Soto, Carissa M.
McDowell, Heather
Liu, Jinny L.
Ratna, Banahalli R.
Korpany, Katalin V.
Zahr, Omar K.
Blum, Amy Szuchmacher
TI Role of Hexahistidine in Directed Nanoassemblies of Tobacco Mosaic Virus
Coat Protein
SO ACS NANO
LA English
DT Article
DE tobacco mosaic virus; atomic force microscopy; self-assembly;
transmission electron microscopy; His-tagged protein; Escherichia coli
ID METAL CHELATE ADSORBENT; ANILINE POLYMERIZATION; SURFACE MODIFICATION;
NANOSTRUCTURES; NANOTECHNOLOGY; NANOPARTICLES; PURIFICATION; ASSEMBLIES;
TEMPLATES; BOTTOM
AB A common challenge in nanotechnology is the fabrication of materials with well-defined nanoscale structure and properties. Here we report that a genetically engineered tobacco mosaic virus (TMV) coat protein (CP), to which a hexahistidine (His) tag was incorporated, can self-assemble Into disks, hexagonally packed arrays of disks, stacked disks, helical rods, fibers, and elongated rafts. The insertion of a His tag to the C-terminus of TMV-CP was shown to significantly affect the self-assembly In comparison to the wild type, WT-TMV-CP. Furthermore, the His tag Interactions attributed to the alternative self assembly of His-TMV-CP can be controlled through ethanol and nickel-nitrilotriacetic acid, (Ni-NTA) additions as monitored with atomic force microscopy.
C1 [Bruckman, Michael A.; Soto, Carissa M.; McDowell, Heather; Liu, Jinny L.; Ratna, Banahalli R.] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
[Korpany, Katalin V.; Zahr, Omar K.; Blum, Amy Szuchmacher] McGill Univ, Dept Chem, Montreal, PQ H3A 2K6, Canada.
RP Ratna, BR (reprint author), USN, Res Lab, Ctr Biomol Sci & Engn, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM ratna@nrl.navy.mil; amy.blum@mcgill.ca
OI Zahr, Omar/0000-0002-5682-9155; Korpany, Katalin/0000-0002-9058-8500
FU Natural Sciences and Engineering Research Council of Canada; Office of
Naval Research; National Research Council
FX We thank M. Francis for the expression plasmid pTMVP-WT and Q. Wang for
wild-type native TMV. A. S. Blum gratefully acknowledges the support of
the Natural Sciences and Engineering Research Council of Canada. B.
Ratna thanks the Office of Naval Research for financial support and M.
Bruckman and H. McDowell for postdoctoral fellowships from the National
Research Council. CM. Soto thanks M. Archer for technical assistance
with AFM. We thank A. Adams and C. Spillmann for reviewing the
manuscript.
NR 44
TC 34
Z9 34
U1 1
U2 46
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
J9 ACS NANO
JI ACS Nano
PD MAR
PY 2011
VL 5
IS 3
BP 1606
EP 1616
DI 10.1021/nn1025719
PG 11
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 737LP
UT WOS:000288570600008
PM 21361370
ER
PT J
AU Shenenberger, D
Barlow, T
AF Shenenberger, Donald
Barlow, Thomas
TI Ulcer on Lower Lip of Deployed Serviceman
SO AMERICAN FAMILY PHYSICIAN
LA English
DT Editorial Material
C1 [Shenenberger, Donald] Navy Med E, Portsmouth, VA USA.
[Barlow, Thomas] USN, Med Ctr, San Diego, CA 92152 USA.
RP Shenenberger, D (reprint author), Navy Med E, Portsmouth, VA USA.
EM Donald.shenenberger@med.navy.mil
NR 5
TC 0
Z9 0
U1 0
U2 0
PU AMER ACAD FAMILY PHYSICIANS
PI KANSAS CITY
PA 8880 WARD PARKWAY, KANSAS CITY, MO 64114-2797 USA
SN 0002-838X
J9 AM FAM PHYSICIAN
JI Am. Fam. Physician
PD MAR 1
PY 2011
VL 83
IS 5
BP 601
EP 602
PG 2
WC Primary Health Care; Medicine, General & Internal
SC General & Internal Medicine
GA 979ZG
UT WOS:000306862800014
PM 21391527
ER
PT J
AU Forgoston, E
Bianco, S
Shaw, LB
Schwartz, IB
AF Forgoston, Eric
Bianco, Simone
Shaw, Leah B.
Schwartz, Ira B.
TI Maximal Sensitive Dependence and the Optimal Path to Epidemic Extinction
SO BULLETIN OF MATHEMATICAL BIOLOGY
LA English
DT Article
DE Stochastic dynamical systems and Lyapunov exponents; Optimal path to
extinction
ID LAGRANGIAN COHERENT STRUCTURES; TIME LYAPUNOV EXPONENTS; COMMUNITY SIZE;
LARGE FLUCTUATIONS; UNITED-STATES; MEASLES; MODELS; STOCHASTICITY;
PERSISTENCE; MANIFOLDS
AB Extinction of an epidemic or a species is a rare event that occurs due to a large, rare stochastic fluctuation. Although the extinction process is dynamically unstable, it follows an optimal path that maximizes the probability of extinction. We show that the optimal path is also directly related to the finite-time Lyapunov exponents of the underlying dynamical system in that the optimal path displays maximum sensitivity to initial conditions. We consider several stochastic epidemic models, and examine the extinction process in a dynamical systems framework. Using the dynamics of the finite-time Lyapunov exponents as a constructive tool, we demonstrate that the dynamical systems viewpoint of extinction evolves naturally toward the optimal path.
C1 [Forgoston, Eric; Schwartz, Ira B.] USN, Res Lab, Nonlinear Syst Dynam Sect, Div Plasma Phys, Washington, DC 20375 USA.
[Bianco, Simone; Shaw, Leah B.] Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USA.
RP Forgoston, E (reprint author), USN, Res Lab, Nonlinear Syst Dynam Sect, Div Plasma Phys, Code 6792, Washington, DC 20375 USA.
EM eric.forgoston.ctr@nrl.navy.mil; sbianco@wm.edu; lbshaw@wm.edu;
ira.schwartz@nrl.navy.mil
RI Schwartz, Ira/A-8073-2009
FU Office of Naval Research; Army Research Office; Jeffress Memorial Trust;
Air Force Office of Scientific Research; National Research Council;
National Institute Of General Medical Sciences [R01GM090204]
FX We gratefully acknowledge support from the Office of Naval Research, the
Army Research Office, the Jeffress Memorial Trust, and the Air Force
Office of Scientific Research. E. F. is supported by a National Research
Council Research Associateship. L. B. S is supported by Award Number
R01GM090204 from the National Institute Of General Medical Sciences. The
content is solely the responsibility of the authors and does not
necessarily represent the official views of the National Institute Of
General Medical Sciences or the National Institutes of Health. We also
gratefully acknowledge M. Dykman for helpful discussions.
NR 52
TC 9
Z9 9
U1 0
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0092-8240
J9 B MATH BIOL
JI Bull. Math. Biol.
PD MAR
PY 2011
VL 73
IS 3
BP 495
EP 514
DI 10.1007/s11538-010-9537-0
PG 20
WC Biology; Mathematical & Computational Biology
SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational
Biology
GA 733HZ
UT WOS:000288255100002
PM 20352495
ER
PT J
AU Choi, J
MacArthur, AHR
Brookhart, M
Goldman, AS
AF Choi, Jongwook
MacArthur, Amy H. Roy
Brookhart, Maurice
Goldman, Alan S.
TI Dehydrogenation and Related Reactions Catalyzed by Iridium Pincer
Complexes
SO CHEMICAL REVIEWS
LA English
DT Review
ID C-H BONDS; AMINE-BORANE ADDUCTS; METAL-CARBON BONDS; (PCP)IR-CATALYZED
ACCEPTORLESS DEHYDROGENATION; THERMOCHEMICAL ALKANE DEHYDROGENATION;
MOLECULAR-WEIGHT POLYAMINOBORANES; AMIDO HYDRIDE COMPLEX;
X-RAY-STRUCTURE; TRANSITION-METAL; PCP-PINCER
C1 [MacArthur, Amy H. Roy] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
[Choi, Jongwook; Goldman, Alan S.] Rutgers State Univ, Dept Chem & Chem Biol, New Brunswick, NJ 08903 USA.
[Brookhart, Maurice] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA.
RP MacArthur, AHR (reprint author), USN Acad, Dept Chem, Annapolis, MD 21402 USA.
EM macarthu@usna.edu; mbrookhart@unc.edu; alan.goldman@rutgers.edu
RI Goldman, Alan/D-9521-2011;
OI Goldman, Alan/0000-0002-2774-710X
FU National Science Foundation [CHE-0719307]; National Science Foundation
Center for Enabling New Technologies through Catalysis (CENTC)
FX We gratefully acknowledge the National Science Foundation (Grant
CHE-0719307) for supporting J.C. and the National Science Foundation
Center for Enabling New Technologies through Catalysis (CENTC) for
funding aspects of the work discussed in this review and for supporting
A.H.R.M. and (in part) A.S.G. and M.B.
NR 180
TC 425
Z9 426
U1 13
U2 219
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0009-2665
J9 CHEM REV
JI Chem. Rev.
PD MAR
PY 2011
VL 111
IS 3
SI SI
BP 1761
EP 1779
DI 10.1021/cr1003503
PG 19
WC Chemistry, Multidisciplinary
SC Chemistry
GA 740UT
UT WOS:000288820600014
PM 21391566
ER
PT J
AU Greenlaw, R
AF Greenlaw, Raymond
TI Wellness, Social Networking, and Algorithms
SO CHIANG MAI JOURNAL OF SCIENCE
LA English
DT Article; Proceedings Paper
CT International Computer Science and Engineering Conference (ICSEC 2010)
CY NOV 17-19, 2010
CL Chiang Mai, THAILAND
DE algorithms; computational-complexity theory; dynamic matching; social
networking; mobile wellness applications; wellness profile model
ID MAXIMUM; GRAPHS
AB This paper is one of the first written that ties together the areas of wellness, social networking, and computational-complexity theory Our goal is to integrate these three fields in order to develop a system in which we can help people improve their well being. There are over one billion obese people in the world and that number is growing alarmingly fast. We must find a way to motivate unhealthy people to take care of themselves, so as to put less strain on economies around the world, less strain on natural resources, less strain on the health-care system, less strain on nearby individuals, and, most importantly, to save lives and to reduce suffering. We have gone from hunters and gathers to sitters and twitterers. As our standard of living increases, so does our size. While eating high-caloric foods, many people watch TV or play with the Internet all day long. And one particular Internet application, social networking, is amazingly popular-nations around the world have a significant percentage of their populations engaged in social-networking sites such as Facebook, Flickr, Friendster, hi5, LinkedIn, MySpace, Orkut, Qzone, and so on. In this paper we leverage the popularity of social networking to improve people's wellness. We propose a WELLNESS PROFILE MODEL that captures a social-network members' characteristics, preferences, activities, vitals, and other relevant information. We formulate dynamic-matching problems whose focus is to find groups of individuals with similar interests and time constraints, so that they can participate in activities together thereby contributing to each other's well being. We examine the computational complexity of the problems from both the sequential and parallel perspectives. Our results tell us how hard these problems are to solve. That is, we determine the complexity of these problems. The problems defined here involve a new type of dynamic matching, as opposed to traditional matching as is done in many of the current Internet social-networking sites and traditional graph theory. We intend to implement restricted versions of some of the algorithms in the systems being developed by Elbrys Networks, Inc.
C1 [Greenlaw, Raymond] USN Acad, Dept Comp Sci, Annapolis, MD 21402 USA.
[Greenlaw, Raymond] Elbrys Networks Inc, Portsmouth, NH 03801 USA.
RP Greenlaw, R (reprint author), USN Acad, Dept Comp Sci, 572M Holloway Rd,Stop 9F US Naval Acad Annapolis, Annapolis, MD 21402 USA.
EM greenlaw@usna.edu
NR 30
TC 1
Z9 1
U1 1
U2 7
PU CHIANG MAI UNIV
PI CHIANG MAI
PA FACULTY SCIENCE, CHIANG MAI, 50200, THAILAND
SN 0125-2526
J9 CHIANG MAI J SCI
JI Chiang Mai J. Sci.
PD MAR
PY 2011
VL 38
SI SI
BP 17
EP 30
PG 14
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 773RG
UT WOS:000291326100004
ER
PT J
AU Small, RJ
Xie, SP
Maloney, ED
de Szoeke, SP
Miyama, T
AF Small, R. Justin
Xie, Shang-Ping
Maloney, Eric D.
de Szoeke, Simon P.
Miyama, Toru
TI Intraseasonal variability in the far-east pacific: investigation of the
role of air-sea coupling in a regional coupled model
SO CLIMATE DYNAMICS
LA English
DT Article
DE Intraseasonal variability; Madden-Julian oscillation; East Pacific;
Climate; Tropical meteorology; Air-sea interaction; Coupled models;
Regional models
ID MADDEN-JULIAN OSCILLATION; GENERAL-CIRCULATION MODEL;
SURFACE-TEMPERATURE-GRADIENTS; EVAPORATION-WIND FEEDBACK; EQUATORIAL
BETA-PLANE; PART I; TROPICAL PACIFIC; BOREAL SUMMER; WARM POOL;
INTERANNUAL VARIABILITY
AB Intraseasonal variability in the eastern Pacific warm pool in summer is studied, using a regional ocean-atmosphere model, a linear baroclinic model (LBM), and satellite observations. The atmospheric component of the model is forced by lateral boundary conditions from reanalysis data. The aim is to quantify the importance to atmospheric deep convection of local air-sea coupling. In particular, the effect of sea surface temperature (SST) anomalies on surface heat fluxes is examined. Intraseasonal (20-90 day) east Pacific warm-pool zonal wind and outgoing longwave radiation (OLR) variability in the regional coupled model are correlated at 0.8 and 0.6 with observations, respectively, significant at the 99% confidence level. The strength of the intraseasonal variability in the coupled model, as measured by the variance of outgoing longwave radiation, is close in magnitude to that observed, but with a maximum located about 10A degrees further west. East Pacific warm pool intraseasonal convection and winds agree in phase with those from observations, suggesting that remote forcing at the boundaries associated with the Madden-Julian oscillation determines the phase of intraseasonal convection in the east Pacific warm pool. When the ocean model component is replaced by weekly reanalysis SST in an atmosphere-only experiment, there is a slight improvement in the location of the highest OLR variance. Further sensitivity experiments with the regional atmosphere-only model in which intraseasonal SST variability is removed indicate that convective variability has only a weak dependence on the SST variability, but a stronger dependence on the climatological mean SST distribution. A scaling analysis confirms that wind speed anomalies give a much larger contribution to the intraseasonal evaporation signal than SST anomalies, in both model and observations. A LBM is used to show that local feedbacks would serve to amplify intraseasonal convection and the large-scale circulation. Further, Hovmoller diagrams reveal that whereas a significant dynamic intraseasonal signal enters the model domain from the west, the strong deep convection mostly arises within the domain. Taken together, the regional and linear model results suggest that in this region remote forcing and local convection-circulation feedbacks are both important to the intraseasonal variability, but ocean-atmosphere coupling has only a small effect. Possible mechanisms of remote forcing are discussed.
C1 [Small, R. Justin] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Small, R. Justin; Xie, Shang-Ping] Univ Hawaii, Int Pacific Res Ctr, Honolulu, HI 96822 USA.
[Xie, Shang-Ping] Univ Hawaii, Sch Ocean & Earth Sci & Technol, Dept Meteorol, Honolulu, HI 96822 USA.
[Maloney, Eric D.] Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA.
[de Szoeke, Simon P.] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
[Miyama, Toru] Frontier Res Global Change, Yokohama, Kanagawa, Japan.
RP Small, RJ (reprint author), USN, Res Lab, Code 7320,Bldg 1009, Stennis Space Ctr, MS 39529 USA.
EM small.ctr.uk@nrlssc.navy.mil; tmiyama@jamstec.go.jp
RI Xie, Shang-Ping/C-1254-2009; Miyama, Toru/A-3824-2009; Maloney,
Eric/A-9327-2008
OI Xie, Shang-Ping/0000-0002-3676-1325; Miyama, Toru/0000-0002-6400-0312;
Maloney, Eric/0000-0002-2660-2611
FU NASA [NAG-10045, 1216010]; Japan Agency for Marine-Earth Science and
Technology (JAMSTEC) through International Pacific Research Center;
Japan Ministry of Education, Culture, Science and Technology; National
Oceanic and Atmospheric Administration (NOAA) [NA07OAR4310257,
NA05OAR4310006]; National Science Foundation [ATM-0832868, ATM-0828531]
FX The constructive comments of two anonymous reviewers helped improve this
paper. The majority of this work was done whilst R. J. S. and S. P. dS
were at the International Pacific Research Center. S.-P. X. and R. J. S.
were supported by NASA (grant NAG-10045 and JPL contract 1216010). S.-P.
X., S. P. dS and R. J. S. were also supported by the Japan Agency for
Marine-Earth Science and Technology (JAMSTEC) through its sponsorship of
the International Pacific Research Center, and Japan Ministry of
Education, Culture, Science and Technology through the Kyosei-7 Project.
S.-P. X. received additional support from the National Oceanic and
Atmospheric Administration (NOAA) under grant NA07OAR4310257. IPRC
contribution number XXX and SOEST contribution number YYY. EDM was
supported under Award# NA05OAR4310006 from NOAA, and by the Climate and
Large-Scale Dynamics Program of the National Science Foundation under
Grants ATM-0832868 and ATM-0828531. The statements, findings,
conclusions, and recommendations do not necessarily reflect the views of
NSF, NOAA, or the Department of Commerce.
NR 79
TC 16
Z9 16
U1 0
U2 6
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0930-7575
J9 CLIM DYNAM
JI Clim. Dyn.
PD MAR
PY 2011
VL 36
IS 5-6
BP 867
EP 890
DI 10.1007/s00382-010-0786-2
PG 24
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 729CB
UT WOS:000287924400004
ER
PT J
AU Gadlage, MJ
Ahlbin, JR
Narasimham, B
Bhuva, BL
Massengill, LW
Schrimpf, RD
AF Gadlage, Matthew J.
Ahlbin, Jonathan R.
Narasimham, Balaji
Bhuva, Bharat L.
Massengill, Lloyd W.
Schrimpf, Ronald D.
TI Single-Event Transient Measurements in nMOS and pMOS Transistors in a
65-nm Bulk CMOS Technology at Elevated Temperatures
SO IEEE TRANSACTIONS ON DEVICE AND MATERIALS RELIABILITY
LA English
DT Article
DE Pulsewidth; radiation environment; soft error rate (SER); single event;
single-event transient (SET); soft error; temperature
ID FULLY-DEPLETED SOI; PULSE-WIDTHS; DEPENDENCE; LOGIC
AB In this paper, heavy-ion-induced single-event transient (SET) pulsewidths measured in a 65-nm bulk CMOS technology at temperatures ranging from 25 degrees C to 100 degrees C with an autonomous SET capture circuit are presented. The experimental results for the SETs induced in two different inverter chain circuits indicate an increase in the average SET pulsewidth as a function of the operating temperature. Unique SET test structures were also designed to differentiate between SETs induced in an nMOS transistor and those induced in a pMOS transistor. The SET widths induced in a pMOS transistor increase more with temperature than the SETs induced in an nMOS transistor.
C1 [Gadlage, Matthew J.] NAVSEA Crane, Crane, IN 47522 USA.
[Ahlbin, Jonathan R.; Narasimham, Balaji; Massengill, Lloyd W.; Schrimpf, Ronald D.] Vanderbilt Univ, Nashville, TN 37212 USA.
[Narasimham, Balaji] Broadcom Corp, Irvine, CA 92617 USA.
RP Gadlage, MJ (reprint author), NAVSEA Crane, Crane, IN 47522 USA.
EM matthew.gadlage@navy.mil; jon.ahlbin@vanderbilt.edu;
balajin@broadcom.com
RI Schrimpf, Ronald/L-5549-2013
OI Schrimpf, Ronald/0000-0001-7419-2701
FU Defense Threat Reduction Agency [HDTRA1-09-C-0038]; NAVSEA Crane; Cisco
Systems
FX This work was supported in part by NAVSEA Crane through their Ph.D.
program, by Cisco Systems, and by the Defense Threat Reduction Agency
under contract HDTRA1-09-C-0038.
NR 15
TC 23
Z9 23
U1 0
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1530-4388
J9 IEEE T DEVICE MAT RE
JI IEEE Trans. Device Mater. Reliab.
PD MAR
PY 2011
VL 11
IS 1
BP 179
EP 186
DI 10.1109/TDMR.2010.2102354
PG 8
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA 735XT
UT WOS:000288454700026
ER
PT J
AU Laguna-Torres, VA
Sanchez-Largaespada, JF
Lorenzana, I
Forshey, B
Aguilar, P
Jimenez, M
Parrales, E
Rodriguez, F
Garcia, J
Jimenez, I
Rivera, M
Perez, J
Sovero, M
Rios, J
Gamero, ME
Halsey, ES
Kochel, TJ
AF Laguna-Torres, Victor A.
Sanchez-Largaespada, Jose F.
Lorenzana, Ivette
Forshey, Brett
Aguilar, Patricia
Jimenez, Mirna
Parrales, Eduardo
Rodriguez, Francisco
Garcia, Josefina
Jimenez, Ileana
Rivera, Maribel
Perez, Juan
Sovero, Merly
Rios, Jane
Gamero, Maria E.
Halsey, Eric S.
Kochel, Tadeusz J.
TI Influenza and other respiratory viruses in three Central American
countries
SO INFLUENZA AND OTHER RESPIRATORY VIRUSES
LA English
DT Article
DE Adenovirus; Central America; enterovirus; influenza; respiratory
viruses; surveillance
ID PARAINFLUENZA VIRUS; SOUTH-AMERICA; INFECTIONS; CHILDREN; PREVALENCE;
MEXICO
AB Background Despite the disease burden imposed by respiratory diseases on children in Central America, there is a paucity of data describing the etiologic agents of the disease.
Aims To analyze viral etiologic agents associated with influenza-like illness (ILI) in participants reporting to one outpatient health center, one pediatric hospital, and three general hospitals in El Salvador, Honduras, and Nicaragua
Material & Methods Between August 2006 and April 2009, pharyngeal swabs were collected from outpatients and inpatients. Patient specimens were inoculated onto cultured cell monolayers, and viral antigens were detected by indirect and direct immunofluorescence staining.
Results A total of 1,756 patients were enrolled, of whom 1,195 (68.3%) were under the age of 5; and 183 (10.4%) required hospitalization. One or more viral agents were identified in 434 (24.7%) cases, of which 17 (3.9%) were dual infections. The most common viruses isolated were influenza A virus (130; 7.4% of cases), respiratory syncytial virus (122; 6.9%), adenoviruses (63; 3.6%), parainfluenza viruses (57; 3.2%), influenza B virus (47; 2.7% of cases), and herpes simplex virus 1 (22; 1.3%). In addition, human metapneumovirus and enteroviruses (coxsackie and echovirus) were isolated from patient specimens.
Discussion When compared to the rest of the population, viruses were isolated from a significantly higher percentage of patients age 5 or younger. The prevalence of influenza A virus or influenza B virus infections was similar between the younger and older age groups. RSV was the most commonly detected pathogen in infants age 5 and younger and was significantly associated with pneumonia (p < 0.0001) and hospitalization (p < 0.0001).
Conclusion
Genetic analysis of influenza isolates identified A (H3N2), A (H1N1), and B viruses. It also showed that the mutation H274Y conferring resistance to oseltamivir was first detected in Honduran influenza A/H1N1 strains at the beginning of 2008. These data demonstrate that a diverse range of respiratory pathogens are associated with ILI in Honduras, El Salvador, and Nicaragua. RSV infection in particular appears to be associated with severe disease in infants in the region.
C1 [Laguna-Torres, Victor A.; Forshey, Brett; Aguilar, Patricia; Garcia, Josefina; Perez, Juan; Sovero, Merly; Rios, Jane; Gamero, Maria E.; Halsey, Eric S.; Kochel, Tadeusz J.] US Naval Med Res Ctr Detachment, Lima, Peru.
[Sanchez-Largaespada, Jose F.; Jimenez, Ileana] Hosp Infantil Manuel Jesus Rivera La Mascota, Managua Minist Salud Nicaragua, Mascota, Mexico.
[Lorenzana, Ivette] Univ Nacl Utonoma Honduras, Tegucigalpa, Honduras.
[Jimenez, Mirna] Hosp Santa Ana, Metapan Minist Salud El Salvador, Santa Ana, El Salvador.
[Rivera, Maribel] Inst Hondureno Seguridad Social, Tegucigalpa, Honduras.
RP Laguna-Torres, VA (reprint author), USN, Med Res Ctr Detachment, 3230 Lima Pl, Washington, DC 20521 USA.
EM alberto.laguna@med.navy.mil
RI Valle, Ruben/A-7512-2013
FU United States Department of Defense [847705.82000.25GB.B0016]
FX This study was funded by the United States Department of Defense Global
Emerging Infections Systems Research Program, WORK UNIT NUMBER:
847705.82000.25GB.B0016.
NR 20
TC 22
Z9 22
U1 1
U2 3
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1750-2640
J9 INFLUENZA OTHER RESP
JI Influenza Other Respir. Viruses
PD MAR
PY 2011
VL 5
IS 2
BP 123
EP 134
DI 10.1111/j.1750-2659.2010.00182.x
PG 12
WC Infectious Diseases; Virology
SC Infectious Diseases; Virology
GA 719HV
UT WOS:000287196200009
PM 21306576
ER
PT J
AU Voas, J
Hurlburt, GF
Miller, KW
Laplante, PA
Michael, B
AF Voas, Jeffrey
Hurlburt, George F.
Miller, Keith W.
Laplante, Phillip A.
Michael, Bret
TI Thoughts on Higher Education and Scientific Research
SO IT PROFESSIONAL
LA English
DT Editorial Material
C1 [Voas, Jeffrey] US Natl Inst Stand & Technol NIST, Princeton, NJ USA.
[Miller, Keith W.] Univ Illinois, Springfield, IL USA.
[Laplante, Phillip A.] Penn State Univ, University Pk, PA 16802 USA.
[Michael, Bret] USN, Postgrad Sch, Monterey, CA USA.
RP Voas, J (reprint author), US Natl Inst Stand & Technol NIST, Princeton, NJ USA.
EM j.voas@ieee.org; ghurlburt@change-index.com; miller.keith@uis.edu;
plaplante@psu.edu; bmichael@nps.edu
NR 8
TC 0
Z9 0
U1 0
U2 1
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 1520-9202
J9 IT PROF
JI IT Prof.
PD MAR-APR
PY 2011
VL 13
IS 2
BP 6
EP 9
PG 4
WC Computer Science, Information Systems; Computer Science, Software
Engineering; Telecommunications
SC Computer Science; Telecommunications
GA 946CB
UT WOS:000304325500002
ER
PT J
AU Shupe, MD
Walden, VP
Eloranta, E
Uttal, T
Campbell, JR
Starkweather, SM
Shiobara, M
AF Shupe, Matthew D.
Walden, Von P.
Eloranta, Edwin
Uttal, Taneil
Campbell, James R.
Starkweather, Sandra M.
Shiobara, Masataka
TI Clouds at Arctic Atmospheric Observatories. Part I: Occurrence and
Macrophysical Properties
SO JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY
LA English
DT Article
ID RADIATION PROPERTIES; REMOTE SENSORS; STRATUS CLOUDS; LIDAR; SURFACE;
SHEBA; RADAR; MICROPHYSICS; RETRIEVALS; ALGORITHM
AB Cloud observations over the past decade from six Arctic atmospheric observatories are investigated to derive estimates of cloud occurrence fraction, vertical distribution, persistence in time, diurnal cycle, and boundary statistics. Each observatory has some combination of cloud lidar, radar, ceilometer, and/or interferometer for identifying and characterizing clouds. By optimally combining measurements from these instruments, it is found that annual cloud occurrence fractions are 58%-83% at the Arctic observatories. There is a clear annual cycle wherein clouds are least frequent in the winter and most frequent in the late summer and autumn. Only in Eureka, Nunavut, Canada, is the annual cycle shifted such that the annual minimum is in the spring with the maximum in the winter. Intersite monthly variability is typically within 10%-15% of the all-site average. Interannual variability at specific sites is less than 13% for any given month and, typically, is less than 3% for annual total cloud fractions. Low-level clouds are most persistent at the observatories. The median cloud persistence for all observatories is 3-5 h; however, 5% of cloud systems at far western Arctic sites are observed to occur for longer than 100 consecutive hours. Weak diurnal variability in cloudiness is observed at some sites, with a daily minimum in cloud occurrence near solar noon for those seasons for which the sun is above the horizon for at least part of the day.
C1 [Shupe, Matthew D.] Univ Colorado, NOAA, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
[Shupe, Matthew D.; Uttal, Taneil] NOAA, Earth Syst Res Lab, Boulder, CO USA.
[Walden, Von P.] Univ Idaho, Moscow, ID 83843 USA.
[Eloranta, Edwin] Univ Wisconsin, Madison, WI USA.
[Campbell, James R.] Naval Res Lab, Monterey, CA USA.
[Starkweather, Sandra M.] Polar Field Serv Inc, Littleton, CO USA.
[Shiobara, Masataka] Natl Inst Polar Res, Tokyo, Japan.
RP Shupe, MD (reprint author), R-PSD3,325 Broadway, Boulder, CO 80305 USA.
EM matthew.shupe@colorado.edu
RI Campbell, James/C-4884-2012; Shupe, Matthew/F-8754-2011
OI Campbell, James/0000-0003-0251-4550; Shupe, Matthew/0000-0002-0973-9982
FU National Science Foundation Arctic Observing Network [ARC 0632187,
0632177, 0612452]; Office of Science (BER), U.S. Department of Energy
[DE-FG02-05ER63965]
FX This research was supported by the National Science Foundation Arctic
Observing Network Project (ARC 0632187, 0632177, and 0612452) and the
Office of Science (BER), U.S. Department of Energy (DE-FG02-05ER63965).
Observational data used in this study were provided by the Department of
Energy's Atmospheric Radiation Measurement (ARM) Program, the NOAA/Earth
System Research Laboratory (ESRL), the Canadian Network for the
Detection of Arctic Change (CANDAC), the University of Idaho, the
University of Colorado, and the micropulse lidar network (MPLnet). We
thank Karen Johnson, Connor Flynn, and David Turner for providing data
streams for Barrow.
NR 43
TC 62
Z9 62
U1 1
U2 22
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 1558-8424
J9 J APPL METEOROL CLIM
JI J. Appl. Meteorol. Climatol.
PD MAR
PY 2011
VL 50
IS 3
BP 626
EP 644
DI 10.1175/2010JAMC2467.1
PG 19
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 750PK
UT WOS:000289560300011
ER
PT J
AU Hwang, PA
AF Hwang, Paul A.
TI A Note on the Ocean Surface Roughness Spectrum
SO JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
LA English
DT Article
ID MEAN-SQUARE SLOPE; RESONANT WAVE INTERACTIONS; SEA-SURFACE;
GRAVITY-WAVES; RADAR; BACKSCATTER; COMPONENTS; BREAKING
AB In a recent study, the dimensionless surface roughness spectrum has been empirically parameterized as a power-law function of the dimensionless wind speed expressed as the ratio of wind friction velocity and phase speed of the surface roughness wave component. The wave-number-dependent proportionality coefficient, A. and exponent, a, of the power-law function are derived from field measurements of the short-wave spectrum. To extend the roughness spectrum model beyond the wavenumber range of field data, analytical functions are formulated such that A and a approach their asymptotic limits: A(0) and a(0) toward the lowest wavenumber, and A(infinity), and a(infinity) toward the highest wavenumber. Of the four asymptotic values, A(infinity) is considered most questionable for the lack of reference information. When applied to the normalized radar cross-section (NRCS) computation, the results are in good agreement (within about 2 dB) with field data or geophysical model functions (GMFs) for incidence angles between 20 degrees and 40 degrees but significant underestimation occurs for higher incidence angles. The comparison study of NRCS computation offers helpful guidelines for adjusting the asymptotic factors, especially the numerical value of A(infinity). Improved agreement between the computed NRCS (vertical polarization) using the new roughness spectrum with GMF is expanded to incidence angles between 20 degrees and 60 degrees. The wind speed range of good agreement between calculation and GMF is below about 15 m s(-1) for Ku band and about 30 m s(-1) for C band.
C1 USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
RP Hwang, PA (reprint author), USN, Remote Sensing Div, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM paul.hwang@nrl.navy.mil
FU Office of Naval Research (NRL) [61153N]
FX This work is sponsored by the Office of Naval Research (NRL program
element 61153N). I am very grateful for the insightful comments and
suggestions from the two anonymous reviewers.
NR 31
TC 18
Z9 18
U1 2
U2 8
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0739-0572
J9 J ATMOS OCEAN TECH
JI J. Atmos. Ocean. Technol.
PD MAR
PY 2011
VL 28
IS 3
BP 436
EP 443
DI 10.1175/2010JTECHO812.1
PG 8
WC Engineering, Ocean; Meteorology & Atmospheric Sciences
SC Engineering; Meteorology & Atmospheric Sciences
GA 743VD
UT WOS:000289045900012
ER
PT J
AU Bandy, A
Faloona, IC
Blomquist, BW
Huebert, BJ
Clarke, AD
Howell, SG
Mauldin, RL
Cantrell, CA
Hudson, JG
Heikes, BG
Merrill, JT
Wang, YH
O'Sullivan, DW
Nadler, W
Davis, DD
AF Bandy, Alan
Faloona, Ian C.
Blomquist, Byron W.
Huebert, Barry J.
Clarke, Antony D.
Howell, Steven G.
Mauldin, R. L.
Cantrell, Christopher A.
Hudson, James G.
Heikes, Brian G.
Merrill, John T.
Wang, Yuhang
O'Sullivan, Daniel W.
Nadler, Wolfgang
Davis, Douglas D.
TI Pacific Atmospheric Sulfur Experiment (PASE): dynamics and chemistry of
the south Pacific tropical trade wind regime
SO JOURNAL OF ATMOSPHERIC CHEMISTRY
LA English
DT Article
DE Chemistry; Dynamics; Tropical; Trade wind; Aerosol; CCN; CN; SO2; DMS;
H2SO4; MSA; H2O2; CH3OOH; Pacific; SO42-
ID MARINE BOUNDARY-LAYER; EQUATORIAL PACIFIC; DIMETHYL SULFIDE; FIELD
OBSERVATIONS; MODEL SIMULATIONS; DMS; NUCLEATION; OXIDATION; SO2
AB The Pacific Atmospheric Sulfur Experiment (PASE) was a comprehensive airborne study of the chemistry and dynamics of the tropical trade wind regime (TWR) east of the island of Kiritibati (Christmas Island, 157A(0), 20' W, 2A(0) 52' N). Christmas Island is located due south of Hawaii. Geographically it is in the northern hemisphere yet it is 6-12A(0) south of the intertropical convergence zone (ITCZ) which places it in the southern hemisphere meteorologically. Christmas Island trade winds in August and September are from east south east at 3-15 ms(-1). Clouds, if present, are fair weather cumulus located in the middle layer of the TWR which is frequently labeled the buffer layer (BuL). PASE provided clear support for the idea that small particles (80 nm) were subsiding into the tropical trade wind regime (TWR) where sulfur chemistry transformed them to larger particles. Sulfur chemistry promoted the growth of some of these particles until they were large enough to activate to cloud drops. This process, promoted by sulfur chemistry, can produce a cooling effect due to the increase in cloud droplet density and changes in cloud droplet size. These increases in particle size observed in PASE promote additional cooling due to direct scattering from the aerosol. These potential impacts on the radiation balance in the TWR are enhanced by the high solar irradiance and ocean albedo of the TWR. Finally because of the large area involved there is a large factional impact on earth's radiation budget. The TWR region near Christmas Island appears to be similar to the TWR that persists in August and September, from southwest of the Galapagos to at least Christmas Island. Transport in the TWR between the Galapagos and Christmas involves very little precipitation which could have removed the aerosol thus explaining at least in part the high concentrations of CCN (a parts per thousand 300 at 0.5% supersaturation) observed in PASE. As expected the chemistry of sulfur in the trade winds was found to be initiated by the emission of DMS into the convective boundary layer (BL, the lowest of three layers). However, the efficiency with which this DMS is converted to SO2 has been brought into further question by this study. This unusual result has come about as result of our using two totally different approaches for addressing this long standing question. In the first approach, based on accepted kinetic rate constants and detailed steps for the oxidation of DMS reflecting detailed laboratory studies, a DMS to SO2 conversion efficiency of 60-73% was determined. This range of values lies well within the uncertainties of previous studies. However, using a completely different approach, involving a budget analysis, a conversion value of 100% was estimated. The latter value, to be consistent with all other sulfur studies, requires the existence of a completely independent sulfur source which would emit into the atmosphere at a source strength approximately half that measured for DMS under tropical Pacific conditions. At this time, however, there is no credible scientific observation that identifies what this source might be.
Thus, the current study has opened for future scientific investigation the major question: is there yet another major tropical marine source of sulfur? Of equal importance, then, is the related question, is our global sulfur budget significantly in error due to the existence of an unknown marine source of sulfur? Pivotal to both questions may be gaining greater insight about the intermediate DMSoxidation species, DMSO, for which rather unusual measurements have been reported in previous marine sulfur studies. The 3 pptv bromine deficit observed in PASE must be lost over the lifetime of the aerosol which is a few days. This observation suggests that the primary BrO production rate is very small. However, considering the uncertainties in these observations and the possible importance of secondary production of bromine radicals through aerosol surface reactions, to completely rule out the importance of bromine chemistry under tropical conditions at this time cannot be justified. This point has been brought into focus from prior work that even at levels of 1 pptv, the effect of BrO oxidation on DMS can still be quite significant. Thus, as in the case of DMS conversion to SO2, future studies will be needed. In the latter case there will need to be a specific focus on halogen chemistry. Such studies clearly must involve specific measurements of radical species such as BrO.
C1 [Faloona, Ian C.] Univ Calif Davis, Davis, CA 95616 USA.
[Bandy, Alan; Nadler, Wolfgang] Drexel Univ, Philadelphia, PA 19104 USA.
[Blomquist, Byron W.; Huebert, Barry J.; Clarke, Antony D.; Howell, Steven G.] Univ Hawaii, Honolulu, HI 96822 USA.
[Mauldin, R. L.] Univ Helsinki, Dept Phys, Helsinki 00014, Finland.
[Cantrell, Christopher A.] Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307 USA.
[Hudson, James G.] Univ Nevada, Desert Res Inst, Reno, NV 89506 USA.
[Heikes, Brian G.; Merrill, John T.] Univ Rhode Isl, Narragansett, RI USA.
[Wang, Yuhang; Davis, Douglas D.] Georgia Inst Technol, Atlanta, GA 30332 USA.
[O'Sullivan, Daniel W.] USN Acad, Annapolis, MD 21402 USA.
RP Faloona, IC (reprint author), Univ Calif Davis, Davis, CA 95616 USA.
EM icfaloona@ucdavis.edu
RI Wang, Yuhang/B-5578-2014;
OI O'Sullivan, Daniel/0000-0001-9104-5703
NR 16
TC 5
Z9 5
U1 0
U2 33
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0167-7764
J9 J ATMOS CHEM
JI J. Atmos. Chem.
PD MAR
PY 2011
VL 68
IS 1
SI SI
BP 5
EP 25
DI 10.1007/s10874-012-9215-8
PG 21
WC Environmental Sciences; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
GA 908IV
UT WOS:000301485000002
ER
PT J
AU Iliopoulos, AP
Michopoulos, JG
Lambrakos, SG
Bernstein, N
AF Iliopoulos, A. P.
Michopoulos, J. G.
Lambrakos, S. G.
Bernstein, N.
TI Performance of inverse atomistic scale fracture modeling on GPGPU
architectures
SO JOURNAL OF COMPUTATIONAL SCIENCE
LA English
DT Article
DE Inverse analysis; Molecular dynamics; General purpose graphical unit
processor; Multiscale modeling; Performance analysis
AB The present work has been motivated by the continuous growth of General Purpose Graphic Processor Unit (GPGPU) technologies as well as the necessity of linking usability with multiscale materials processing and design. The inverse problem of determining the phenomenological interparticle Lenard-Jones potential governing the fracture dynamics of a two dimensional structure under tension, is used to examine the feasibility and efficiency of utilizing GPGPU architectures. The implementation of this inverse problem under a molecular dynamics framework provides verification of this methodology. The main contribution of this paper is a performance evaluation driven sensitivity analysis that is contacted on GPGPU-enabled hardware in order to examine efficiency relative to various combinations of GPGPU and Central Processing Unit (CPU) cores as a function of problem size. In particular, speedup factors are determined relative to various number of core combinations of a quad core processor. Published by Elsevier B.V.
C1 [Iliopoulos, A. P.] Naval Res Lab, Sci Applicat Int Corp, Syst Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
[Michopoulos, J. G.; Lambrakos, S. G.; Bernstein, N.] Naval Res Lab, Computat Multiphys Syst Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RP Michopoulos, JG (reprint author), Naval Res Lab, Computat Multiphys Syst Lab, Ctr Computat Mat Sci, Code 6394, Washington, DC 20375 USA.
EM john.michopoulos@nrl.navy.mil
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
FU NRL; Office of Naval Research
FX The authors acknowledge the support of this work by NRL's core funding
and the Office of Naval Research.
NR 34
TC 2
Z9 2
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1877-7503
J9 J COMPUT SCI-NETH
JI J. Comput. Sci.
PD MAR
PY 2011
VL 2
IS 1
BP 39
EP 46
DI 10.1016/j.jocs.2010.12.005
PG 8
WC Computer Science, Interdisciplinary Applications; Computer Science,
Theory & Methods
SC Computer Science
GA V30HW
UT WOS:000208808100005
ER
PT J
AU Demchak, CC
AF Demchak, Chris C.
TI 'So, What Surprised You?' Essay on the Seminal Contributions and
Mentorship of Todd R. LaPorte
SO JOURNAL OF CONTINGENCIES AND CRISIS MANAGEMENT
LA English
DT Editorial Material
C1 USN, Strateg Res Dept, War Coll, Newport, RI 02841 USA.
RP Demchak, CC (reprint author), USN, Strateg Res Dept, War Coll, Code 30,686 Cushing Rd, Newport, RI 02841 USA.
EM chris.demchak@usnwc.edu
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0966-0879
J9 J CONTING CRISIS MAN
JI J. Cont. Crisis Manag.
PD MAR
PY 2011
VL 19
IS 1
SI SI
BP 32
EP 33
DI 10.1111/j.1468-5973.2010.00625.x
PG 2
WC Management
SC Business & Economics
GA V27UE
UT WOS:000208637300007
ER
PT J
AU McCarthy, T
AF McCarthy, Tom
TI Ox Cart to Automobile: Social Change in Western New York
SO JOURNAL OF INTERDISCIPLINARY HISTORY
LA English
DT Book Review
C1 [McCarthy, Tom] USN Acad, Annapolis, MD 21402 USA.
RP McCarthy, T (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU MIT PRESS
PI CAMBRIDGE
PA 55 HAYWARD STREET, CAMBRIDGE, MA 02142 USA
SN 0022-1953
J9 J INTERDISCIPL HIST
JI J. Interdiscip. Hist.
PD SPR
PY 2011
VL 41
IS 4
BP 659
EP 660
DI 10.1162/JINH_r_00186
PG 2
WC History
SC History
GA 727UX
UT WOS:000287829400032
ER
PT J
AU Quartararo, AT
AF Quartararo, Anne T.
TI Administration of favors: The State, the Deaf and the Blind (1789-1885)
SO JOURNAL OF MODERN HISTORY
LA English
DT Book Review
C1 [Quartararo, Anne T.] USN Acad, Annapolis, MD 21402 USA.
RP Quartararo, AT (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0022-2801
J9 J MOD HIST
JI J. Mod. Hist.
PD MAR
PY 2011
VL 83
IS 1
BP 183
EP 184
DI 10.1086/658022
PG 4
WC History
SC History
GA 794XS
UT WOS:000292935200029
ER
PT J
AU Radko, T
Stern, ME
AF Radko, Timour
Stern, Melvin E.
TI Finescale Instabilities of the Double-Diffusive Shear Flow
SO JOURNAL OF PHYSICAL OCEANOGRAPHY
LA English
DT Article
ID STRATIFIED TURBULENT FLUID; SALT FINGER CONVECTION; THERMOHALINE
CONVECTION; COLLECTIVE INSTABILITY; OCEAN MICROSTRUCTURE; 3 DIMENSIONS;
STABILITY; LAYERS; THERMOCLINE; BREAKING
AB This study examines dynamics of finescale instabilities in thermohaline-shear flows. It is shown that the presence of the background diapycnal temperature and salinity fluxes due to double diffusion has a destabilizing effect on the basic current. Using linear stability analysis based on the Floquet theory for the sinusoidal basic velocity profile, the authors demonstrate that the well-known Richardson number criterion (Ri < 1/4) cannot be directly applied to doubly diffusive fluids. Rigorous instabilities are predicted to occur for Richardson numbers as high as-or even exceeding-unity. The inferences from the linear theory are supported by the fully nonlinear numerical simulations. Since the Richardson number in the main thermocline rarely drops below 1/4, whereas the observations of turbulent patches are common, the authors hypothesize that some turbulent mixing events can be attributed to the finescale instabilities associated with double-diffusive processes.
C1 [Radko, Timour; Stern, Melvin E.] USN, Dept Oceanog, Postgrad Sch, Monterey, CA 93943 USA.
RP Radko, T (reprint author), USN, Dept Oceanog, Postgrad Sch, Monterey, CA 93943 USA.
EM tradko@nps.edu
FU National Science Foundation [OCE 0547650, AST 0806431, CBET 0933057, ANT
0944536]
FX The paper benefitted from comments by Eric Kunze, William Shaw, Tim
Stanton and reviewers. Support of the National Science Foundation
(Grants OCE 0547650, AST 0806431, CBET 0933057, and ANT 0944536) is
gratefully acknowledged.
NR 69
TC 8
Z9 8
U1 0
U2 6
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0022-3670
EI 1520-0485
J9 J PHYS OCEANOGR
JI J. Phys. Oceanogr.
PD MAR
PY 2011
VL 41
IS 3
BP 571
EP 585
DI 10.1175/2010JPO4459.1
PG 15
WC Oceanography
SC Oceanography
GA 747MX
UT WOS:000289325200012
ER
PT J
AU Brennan, T
AF Brennan, Thomas
TI A Revolution in Taste: The Rise of French Cuisine
SO JOURNAL OF SOCIAL HISTORY
LA English
DT Book Review
C1 [Brennan, Thomas] USN Acad, Annapolis, MD 21402 USA.
RP Brennan, T (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 1
U2 4
PU GEORGE MASON UNIV
PI FAIRFAX
PA DEPT HISTORY & ART HISTORY, CENTER HISTORY & NEW MEDIA, 4400 UNIVERSITY
DR, FAIRFAX, VA 22030 USA
SN 0022-4529
J9 J SOC HIST
JI J. Soc. Hist.
PD SPR
PY 2011
VL 44
IS 3
BP 983
EP 984
PG 2
WC History
SC History
GA 740EX
UT WOS:000288775500039
ER
PT J
AU McCarthy, T
AF McCarthy, Tom
TI The Model T: A Centennial History
SO MICHIGAN HISTORICAL REVIEW
LA English
DT Book Review
C1 [McCarthy, Tom] USN Acad, Annapolis, MD 21402 USA.
RP McCarthy, T (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU CENTRAL MICHIGAN UNIV CLARKE HISTORICAL LIBRARY
PI MT PLEASANT
PA MT PLEASANT, MI 48859 USA
SN 0360-1846
J9 MICH HIST REV
JI Mich. Hist. Rev.
PD SPR
PY 2011
VL 37
IS 1
BP 145
EP 146
PG 2
WC History
SC History
GA 779FW
UT WOS:000291764500009
ER
PT J
AU Aberson, SD
Majumdar, SJ
Reynolds, CA
Etherton, BJ
AF Aberson, Sim D.
Majumdar, Sharanya J.
Reynolds, Carolyn A.
Etherton, Brian J.
TI An Observing System Experiment for Tropical Cyclone Targeting Techniques
Using the Global Forecast System
SO MONTHLY WEATHER REVIEW
LA English
DT Article
ID HURRICANE SYNOPTIC SURVEILLANCE; ADAPTIVE OBSERVATIONS; ENSEMBLE
TRANSFORM; PREDICTION SYSTEM; SINGULAR VECTORS; GUIDANCE; MODEL;
PERTURBATIONS; DOTSTAR; IMPACT
AB In 1997, the National Oceanic and Atmospheric Administration's National Hurricane Center and the Hurricane Research Division began operational synoptic surveillance missions with the Gulfstream IV-SP jet aircraft to improve the numerical guidance for hurricanes that threaten the continental United States, Puerto Rico. the U.S. Virgin Islands, and Hawaii. The dropwindsonde observations from these missions were processed and formatted aboard the aircraft and sent to the National Centers for Environmental Prediction and the Global Telecommunications System to be ingested into the Global Forecasting System. which serves as initial and boundary conditions for regional numerical models that also forecast tropical cyclone track and intensity. As a result of limited aircraft resources, optimal observing strategies for these missions are investigated. An Observing System Experiment in which different configurations of the dropwindsonde data based on three targeting techniques (ensemble variance, ensemble transform Kalman filter, and total energy singular vectors) are assimilated into the model system was conducted. All three techniques show some promise in obtaining maximal forecast improvements while limiting flight time and expendables. The data taken within and around the regions specified by the total energy singular vectors provide the largest forecast improvements, though the sample size is too small to make any operational recommendations. Case studies show that the impact of dropwindsonde data obtained either outside of fully sampled, or within nonfully sampled target regions is generally, though not always, small; this suggests that the techniques are able to discern in which regions extra observations will impact the particular forecast.
C1 [Aberson, Sim D.] NOAA, AOML, Hurricane Res Div, Miami, FL 33149 USA.
[Majumdar, Sharanya J.] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33149 USA.
[Reynolds, Carolyn A.] USN, Res Lab, Monterey, CA USA.
[Etherton, Brian J.] Univ N Carolina, Renaissance Comp Inst, Chapel Hill, NC USA.
RP Aberson, SD (reprint author), NOAA, AOML, Hurricane Res Div, 4301 Rickenbacker Cswy, Miami, FL 33149 USA.
EM sim.aberson@noaa.gov
RI Aberson, Sim/C-4891-2013; Etherton, Brian/E-7419-2015;
OI Aberson, Sim/0000-0002-3670-0100; Etherton, Brian/0000-0002-2760-0095;
Reynolds, Carolyn/0000-0003-4690-4171
FU ONR [PE-0601153N]; Joint Hurricane Testbed
FX The first author thanks NCEP/EMC for help in running the models and in
providing the computer resources to make this study possible. Bob Kohler
and Bill Barry provided computer support at HRD. Altug Aksoy,
Sundararaman Gopalakrishnan, Mike Jankulak, Tomislava Vukicevic, and an
anonymous reviewer improved previous versions of this manuscript. The
authors thank the NOAA/Aircraft Operations Center (AOC) flight crews,
AOC G-IV project manager Jack Parrish, and HRD personnel who
participated in the flights, in addition to Air Force C-130 crews that
also provided surveillance data over the years. CAR gratefully
acknowledges the support from the sponsor, ONR PE-0601153N, and computer
resources provided by the Department of Defense High-performance
Computing program. The Joint Hurricane Testbed funded SJM and BJE for
some of this work.
NR 33
TC 14
Z9 16
U1 0
U2 6
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0027-0644
J9 MON WEATHER REV
JI Mon. Weather Rev.
PD MAR
PY 2011
VL 139
IS 3
BP 895
EP 907
DI 10.1175/2010MWR3397.1
PG 13
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 744UQ
UT WOS:000289120600012
ER
PT J
AU Halliwell, GR
Shay, LK
Brewster, JK
Teague, WJ
AF Halliwell, G. R., Jr.
Shay, L. K.
Brewster, J. K.
Teague, W. J.
TI Evaluation and Sensitivity Analysis of an Ocean Model Response to
Hurricane Ivan
SO MONTHLY WEATHER REVIEW
LA English
DT Article
ID GULF-OF-MEXICO; TROPICAL CYCLONE INTENSITY; SEA-SURFACE TEMPERATURE;
WESTERN NORTH PACIFIC; MIXED-LAYER RESPONSE; VERTICAL DIFFUSIVITIES;
PREDICTION SYSTEM; CLOSURE-MODEL; PART I; HEAT
AB An ocean model response to Hurricane Ivan (2004) over the northwest Caribbean Sea and Gulf of Mexico is evaluated to guide strategies for improving performance during strong forcing events in a region with energetic ocean features with the ultimate goal of improving coupled tropical cyclone forecasts. Based on prior experience, a control experiment is performed using quasi-optimal choices of initial ocean fields, atmospheric forcing fields, air-sea flux parameterizations, vertical mixing parameterizations, and both horizontal and vertical resolutions. Alternate experiments are conducted by altering one single model attribute and comparing the results to SST analyses and moored ADCP current measurements to quantify the sensitivity to that attribute and identify where to concentrate model improvement efforts. Atmospheric forcing that does not resolve the eye and eyewall of the storm (scales > 10 km) substantially degrades the ocean response. Ordering other model attributes from greatest to least sensitivity, ocean model initialization with regard to the accuracy of upper-ocean temperature-salinity profiles along with accurate location of ocean currents and eddies is the most important factor for ensuring good ocean model performance. Ocean dynamics ranks second in this energetic ocean region because a one-dimensional ocean model fails to capture important physical processes that affect SST cooling. Wind stress drag coefficient parameterizations that yield values exceeding 2.5 X 10(-3) at high wind speeds or that remain < 2.0 x 10(-3) over all wind speeds reduce the realism of wind-driven current profiles and have a large impact on both SST cooling and the heat flux from ocean to atmosphere. Turbulent heat flux drag coefficient parameterizations substantially impact the surface heat flux while having little impact on SST cooling, which is primarily controlled by entrainment at the mixed layer base. Vertical mixing parameterizations have a moderate impact on SST cooling but a comparatively larger impact on surface heat flux. The impacts of altering the horizontal and vertical resolutions are small, with horizontal resolution of approximate to 10 km and vertical resolution of approximate to 10 m in the mixed layer being adequate. Optimal choices of all attributes for simulating the ocean response to Ivan are identified.
C1 [Halliwell, G. R., Jr.; Shay, L. K.; Brewster, J. K.] Univ Miami, MPO RSMAS, Miami, FL USA.
[Teague, W. J.] USN, Res Lab, Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
RP Halliwell, GR (reprint author), NOAA AOML PhOD, 4301 Rickenbacker Cswy, Miami, FL 33149 USA.
EM george.halliwell@noaa.gov
RI Halliwell, George/B-3046-2011
OI Halliwell, George/0000-0003-4216-070X
FU National Oceanic and Atmospheric Administration [NA17RJ1226]; National
Science Foundation [ATM0444525]; Office of Naval Research [0601153N]
FX This work was sponsored by the National Oceanic and Atmospheric
Administration (Grant NA17RJ1226) and the National Science Foundation
(Grant ATM0444525). The daily Reynolds blended SST maps were obtained
online
(http://www.ncdc.noaa.gov/oa/climate/research/sst/description.php). The
Office of Naval Research supported the Naval Research Laboratory's basic
research project "Slope to Shelf Energetics and Exchange Dynamics"
(SEED) under Program Element 0601153N.
NR 58
TC 27
Z9 27
U1 0
U2 16
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0027-0644
J9 MON WEATHER REV
JI Mon. Weather Rev.
PD MAR
PY 2011
VL 139
IS 3
BP 921
EP 945
DI 10.1175/2010MWR3104.1
PG 25
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 744UQ
UT WOS:000289120600014
ER
PT J
AU Hite, JK
Twigg, ME
Tedesco, JL
Friedman, AL
Myers-Ward, RL
Eddy, CR
Gaskill, DK
AF Hite, Jennifer K.
Twigg, Mark E.
Tedesco, Joseph L.
Friedman, Adam L.
Myers-Ward, Rachael L.
Eddy, Charles R., Jr.
Gaskill, D. Kurt
TI Epitaxial Graphene Nucleation on C-Face Silicon Carbide
SO NANO LETTERS
LA English
DT Article
DE Graphene; nucleation; dislocation; electron channeling contrast imaging
AB The initial stages of epitaxial graphene growth were studied by characterization of graphene formed in localized areas on C-face 6H-SiC substrates. The graphene areas were determined to lie below the level of the surrounding substrate and showed different morphologies based on size. Employing electron channeling contrast imaging, the presence of threading screw dislocations was indicated near the centers of each of these areas. After the graphene was removed, these dislocations were revealed to lie within the SiC substrate. These observations suggest that screw dislocations act as preferred nucleation sites for graphene growth on C-face SiC.
C1 [Hite, Jennifer K.; Twigg, Mark E.; Tedesco, Joseph L.; Friedman, Adam L.; Myers-Ward, Rachael L.; Eddy, Charles R., Jr.; Gaskill, D. Kurt] USN, Res Lab, Washington, DC 20375 USA.
RP Hite, JK (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM jennifer.hite@nrl.navy.mil
RI Friedman, Adam/D-9610-2011; Hite, Jennifer/L-5637-2015
OI Friedman, Adam/0000-0003-0597-5432; Hite, Jennifer/0000-0002-4090-0826
FU Office of Naval Research at the U.S. Naval Research Laboratory; American
Society for Engineering Education Naval Research Laboratory
FX Work at the U.S. Naval Research Laboratory is supported by the Office of
Naval Research. J.K.H., J.L.T., and A.L.F. acknowledge the support of
the American Society for Engineering Education Naval Research Laboratory
Postdoctoral Fellowship Program.
NR 27
TC 29
Z9 29
U1 2
U2 31
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAR
PY 2011
VL 11
IS 3
BP 1190
EP 1194
DI 10.1021/nl104072y
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 730UY
UT WOS:000288061500048
PM 21322598
ER
PT J
AU Kim, D
Carter, SG
Greilich, A
Bracker, AS
Gammon, D
AF Kim, Danny
Carter, Samuel G.
Greilich, Alex
Bracker, Allan S.
Gammon, Daniel
TI Ultrafast optical control of entanglement between two quantum-dot spins
SO NATURE PHYSICS
LA English
DT Article
ID COUPLED ELECTRON SPINS; STATE; SEMICONDUCTOR; MANIPULATION
AB The interaction between two quantum bits enables the creation of entanglement, the two-particle correlations that are at the heart of quantum information science. In semiconductor quantum dots, much work has focused on demonstrating control over single spin qubits using optical techniques. However, optical control of two spin qubits remains a major challenge for scaling to a fully fledged quantum-information platform. Here, we combine advances in vertically stacked quantum dots with ultrafast laser techniques to achieve optical control of the entangled state of two electron spins. Each electron is in a separate InAs quantum dot, and the spins interact through tunnelling, where the tunnelling rate determines how rapidly entangling operations can be carried out. We achieve two-qubit gates with an interaction rate of 30 GHz, more than an order of magnitude faster than demonstrated in any other system so far. These results demonstrate the viability and advantages of optically controlled quantum-dot spins for multi-qubit systems.
C1 [Kim, Danny; Carter, Samuel G.; Greilich, Alex; Bracker, Allan S.; Gammon, Daniel] USN, Res Lab, Washington, DC 20375 USA.
RP Kim, D (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM gammon@nrl.navy.mil
RI Kim, Danny/A-7066-2009; Carter, Sam/G-4589-2012; Greilich,
Alex/A-8927-2009
OI Kim, Danny/0000-0001-7396-3826;
FU NSA/ARO; ARO MURI; DARPA; ONR
FX This work was supported by NSA/ARO, ARO MURI, DARPA and ONR.
NR 50
TC 107
Z9 107
U1 1
U2 26
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1745-2473
J9 NAT PHYS
JI Nat. Phys.
PD MAR
PY 2011
VL 7
IS 3
BP 223
EP 229
DI 10.1038/NPHYS1863
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 728AC
UT WOS:000287844300021
ER
PT J
AU Rosenberg, M
Bernhardt, PA
Clark, SE
AF Rosenberg, M.
Bernhardt, P. A.
Clark, S. E.
TI Excitation of ion waves by charged dust beams in ionospheric aerosol
release experiments
SO PLANETARY AND SPACE SCIENCE
LA English
DT Article
DE Dusty plasma; Instability; Aerosol release experiments
ID ATMOSPHERIC MODIFICATION EXPERIMENT; LOWER-HYBRID INSTABILITY;
SPACE-SHUTTLE EXHAUST; ROCKET EXHAUST; PLASMA; BACKSCATTER; GENERATION;
PARTICLES; DYNAMICS; ARECIBO
AB Ion waves excited by charged dust beams streaming across or along the geomagnetic field in the ionosphere may be generated by plasma instabilities during aerosol release experiments. The injection speed of the dust and gas is comparable to or larger than the ion thermal speed in the background plasma. The dust grains can get charged by plasma collection from the ambient ionosphere, and can thus act as a charged beam that excites instabilities in the background plasma. The theory is applied to relatively early time scales of the order of similar to 0.1-1 s in the dust-gas cloud expansion, with wave frequencies that are larger than the ion gyrofrequency, and collisions with neutrals are included. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Rosenberg, M.; Clark, S. E.] Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA.
[Bernhardt, P. A.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Rosenberg, M (reprint author), Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA.
EM rosenber@ecepops.ucsd.edu
FU NSF [PHY-0903808, ATM-0907941]; NASA [NNX10AR54G]; Office of Naval
Research
FX The research at UCSD was supported by NSF Grants PHY-0903808 and
ATM-0907941 and NASA Grant NNX10AR54G. The research at the Naval
Research Laboratory was sponsored by the Office of Naval Research.
NR 33
TC 7
Z9 7
U1 3
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0032-0633
J9 PLANET SPACE SCI
JI Planet Space Sci.
PD MAR
PY 2011
VL 59
IS 4
BP 312
EP 318
DI 10.1016/j.pss.2010.11.013
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 727VM
UT WOS:000287831000002
ER
PT J
AU Wasylyshyn, C
Verhaeghen, P
Sliwinski, MJ
AF Wasylyshyn, Christina
Verhaeghen, Paul
Sliwinski, Martin J.
TI Aging and Task Switching: A Meta-Analysis
SO PSYCHOLOGY AND AGING
LA English
DT Article
DE task switching; aging; meta-analysis; executive control
ID ADULT AGE-DIFFERENCES; EXECUTIVE CONTROL; OLDER-ADULTS; LIFE-SPAN;
FIGURAL TRANSFORMATIONS; PREFRONTAL CORTEX; COGNITIVE CONTROL;
WORKING-MEMORY; MENTAL SETS; PERFORMANCE
AB A meta-analysis of 26 published articles (with 36 independent participant groups) was conducted to analyze the relationship between task-switching effects and aging. Latency served as the dependent measure. Multilevel modeling was used to test for additive and multiplicative complexity effects in local and global switch costs. Global task switching was found to add 1 or more stages to processing and resulted in a marked age deficit. Local task-switching costs, on the other hand, showed a multiplicative complexity effect but no specific attention-related age deficits. Cueing or switch predictability did not affect age differences.
C1 [Wasylyshyn, Christina] USN, Res Lab, Washington, DC 20375 USA.
[Verhaeghen, Paul] Georgia Inst Technol, Sch Psychol, Atlanta, GA 30332 USA.
[Sliwinski, Martin J.] Penn State Univ, Dept Human Dev & Family Studies, University Pk, PA 16802 USA.
RP Wasylyshyn, C (reprint author), USN, Res Lab, Code 5512,4555 Overlook Ave, Washington, DC 20375 USA.
EM christina.wasylyshyn@nrl.navy.mil
FU NIA NIH HHS [AG-16201, AG-26728, R01 AG016201, R01 AG026728, R56
AG016201]
NR 56
TC 67
Z9 69
U1 5
U2 21
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 0882-7974
J9 PSYCHOL AGING
JI Psychol. Aging
PD MAR
PY 2011
VL 26
IS 1
BP 15
EP 20
DI 10.1037/a0020912
PG 6
WC Gerontology; Psychology, Developmental
SC Geriatrics & Gerontology; Psychology
GA 737TJ
UT WOS:000288590800002
PM 21261411
ER
PT J
AU Lutgendorf, MA
Johnson, AM
Terpstra, EA
Snider, TC
McKelvey, SA
Magann, EF
AF Lutgendorf, Monica A.
Johnson, Alan M.
Terpstra, Eric A.
Snider, Tracie C.
McKelvey, Samantha A.
Magann, Everett F.
TI Extra Amniotic Balloon for Pre-Induction Cervical Ripening: A Randomized
Comparison of Weighted Traction vs. Non-Weighted
SO REPRODUCTIVE SCIENCES
LA English
DT Meeting Abstract
C1 [Lutgendorf, Monica A.; Terpstra, Eric A.; Snider, Tracie C.] USN, Med Ctr Portsmouth, Portsmouth, VA USA.
[Johnson, Alan M.; McKelvey, Samantha A.; Magann, Everett F.] Univ Arkansas, Little Rock, AR 72204 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1933-7191
J9 REPROD SCI
JI Reprod. Sci.
PD MAR
PY 2011
VL 18
IS 3
SU S
MA S127
BP 331A
EP 332A
PG 2
WC Obstetrics & Gynecology; Reproductive Biology
SC Obstetrics & Gynecology; Reproductive Biology
GA 778RE
UT WOS:000291721701469
ER
PT J
AU Magann, EF
Chauhan, SP
Hitt, WC
Dubil, EA
McKelvey, SA
Morrison, JC
AF Magann, Everett F.
Chauhan, Suneet P.
Hitt, Wilbur C.
Dubil, Elizabeth A.
McKelvey, Samantha A.
Morrison, John C.
TI Borderline or Marginal Amniotic Fluid Index and Peripartum Outcomes: A
Review of the Literature
SO REPRODUCTIVE SCIENCES
LA English
DT Meeting Abstract
C1 [Magann, Everett F.; Hitt, Wilbur C.; McKelvey, Samantha A.] Univ Arkansas, Little Rock, AR 72204 USA.
[Chauhan, Suneet P.] Eastern Virginia Med Sch, Norfolk, VA 23501 USA.
[Dubil, Elizabeth A.] Naval Med Ctr Portsmouth, Portsmouth, VA USA.
[Morrison, John C.] Univ Mississippi, Jackson, MS 39216 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1933-7191
J9 REPROD SCI
JI Reprod. Sci.
PD MAR
PY 2011
VL 18
IS 3
SU S
MA S289
BP 378A
EP 378A
PG 1
WC Obstetrics & Gynecology; Reproductive Biology
SC Obstetrics & Gynecology; Reproductive Biology
GA 778RE
UT WOS:000291721701625
ER
PT J
AU Magann, EF
Lutgendorf, MA
Porter, SR
Siegel, ER
McKelvey, SA
Morrison, JC
AF Magann, Everett F.
Lutgendorf, Monica A.
Porter, Stephanie R.
Siegel, Eric R.
McKelvey, Samatha A.
Morrison, John C.
TI Risk Factors for a Prolonged Third Stage of Labor and for a Postpartum
Hemorrhage
SO REPRODUCTIVE SCIENCES
LA English
DT Meeting Abstract
C1 [Magann, Everett F.; McKelvey, Samatha A.] Univ Arkansas Med Sci, OB GYN, Little Rock, AR 72205 USA.
[Lutgendorf, Monica A.] USN, OB GYN, Med Ctr Portsmouth, Portsmouth, VA USA.
[Porter, Stephanie R.] Univ TN, OB GYN, Knoxville, TN USA.
[Morrison, John C.] Univ Mississippi, OB GYN, Jackson, MS 39216 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1933-7191
J9 REPROD SCI
JI Reprod. Sci.
PD MAR
PY 2011
VL 18
IS 3
SU S
MA S290
BP 378A
EP 378A
PG 1
WC Obstetrics & Gynecology; Reproductive Biology
SC Obstetrics & Gynecology; Reproductive Biology
GA 778RE
UT WOS:000291721701626
ER
PT J
AU Caton, PA
Hamilton, LJ
Cowart, JS
AF Caton, Patrick A.
Hamilton, Leonard J.
Cowart, Jim S.
TI Understanding Ignition Delay Effects With Pure Component Fuels in a
Single-Cylinder Diesel Engine
SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE
ASME
LA English
DT Article
ID TURBULENT JETS; COMBUSTION; HYDROCARBONS; ENTRAINMENT; OXIDATION;
MECHANISM
AB In order to better understand how future candidate diesel fuels may affect combustion characteristics in diesel engines, 21 pure component hydrocarbon fuels were tested in a single-cylinder diesel engine. These pure component fuels included normal alkanes (C6-C16), normal primary alkenes (C6-C18), isoalkanes, cycloalkanes/-enes, and aromatic species. In addition, seven fuel blends were tested, including commercial diesel fuel, U. S. Navy JP-5 aviation fuel, and five Fischer-Tropsch synthetic fuels. Ignition delay was used as a primary combustion metric for each fuel, and the ignition delay period was analyzed from the perspective of the physical delay period followed by the chemical delay period. While fuel properties could not strictly be varied independently of each other, several ignition delay correlations with respect to physical properties were suggested. In general, longer ignition delays were observed for component fuels with lower liquid fuel density, kinematic viscosity, and liquid-air surface tension. Longer ignition delay was also observed for component fuels with higher fuel volatility, as measured by boiling point and vapor pressure. Experimental data show two regimes of operation: For a carbon chain length of 12 or greater, there is little variation in ignition delay for the tested fuels. For shorter chain lengths, a fuel molecular structure is very important. Carbon chain length was used as a scaling variable with an empirical factor to collapse the ignition delay onto a single trend line. Companion detailed kinetic modeling was pursued on the lightest fuel species set (C6) since this fuel set possessed the greatest ignition delay differences. The kinetic model gives a chemical ignition delay time, which, together with the measured experimental ignition delay, suggests that the physical and chemical delay period have comparable importance. However, the calculated chemical delay periods capture the general variation in the overall ignition delay and could be used to predict the ignition delay of possible future synthetic diesel fuels. [DOI: 10.1115/1.4001943]
C1 [Caton, Patrick A.; Hamilton, Leonard J.; Cowart, Jim S.] USN Acad, Annapolis, MD 21402 USA.
RP Caton, PA (reprint author), USN Acad, Annapolis, MD 21402 USA.
EM patcaton@usna.edu; ljhamilt@usna.edu; cowart@usna.edu
FU Office of Naval Research
FX The authors wish to thank Dr. Dave Shifler and the Office of Naval
Research for their support of this work. The excellent technical support
of John Hein, Charles Baesch, and Bob Woody is also acknowledged.
NR 35
TC 5
Z9 5
U1 2
U2 6
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0742-4795
J9 J ENG GAS TURB POWER
JI J. Eng. Gas. Turbines Power-Trans. ASME
PD MAR
PY 2011
VL 133
IS 3
AR 032803
DI 10.1115/1.4001943
PG 11
WC Engineering, Mechanical
SC Engineering
GA 680ZH
UT WOS:000284275500014
ER
PT J
AU Hofmann, T
Herzinger, CM
Tedesco, JL
Gaskill, DK
Woollam, JA
Schubert, M
AF Hofmann, T.
Herzinger, C. M.
Tedesco, J. L.
Gaskill, D. K.
Woollam, J. A.
Schubert, M.
TI Terahertz ellipsometry and terahertz optical-Hall effect
SO THIN SOLID FILMS
LA English
DT Article; Proceedings Paper
CT 5th International Conference on Spectroscopic Ellipsometry
CY MAY 23-29, 2010
CL Univ Albany, Coll Nanoscale & Engn, Albany, NY
HO Univ Albany, Coll Nanoscale & Engn
DE Terahertz; Ellipsometry; Frequency domain; Optical-Hall effect;
Free-charge carrier properties
ID INFRARED MAGNETOOPTIC ELLIPSOMETRY; FREE-ELECTRON LASER; EPITAXIAL
GRAPHENE; EFFECTIVE-MASS; TIME; THZ; SPECTROSCOPY; TRANSISTORS;
TECHNOLOGY; PARAMETERS
AB Ellipsometry has been proven as an excellent tool for the precise and accurate determination of material optical properties in the spectral range from the far infrared to the vacuum ultraviolet. In the terahertz frequency domain, however, ellipsometry is still in its infancy. Here we report on our recent development of rotating optical element frequency domain terahertz ellipsometry using electron-beam based, quasi-optical light sources. We demonstrate that high power backward wave oscillator type sources are readily available for the use in spectroscopic ellipsometry instrumentation for the terahertz spectral range. We review recent results on the application of terahertz ellipsometry. Exemplarily, the contact-free optical determination of free-charge carrier properties for very small doping concentrations and doping profiles in iso- and aniso-type Si homojunctions will be discussed. Furthermore, terahertz optical-Hall effect measurements on high-mobility epitaxial graphene on SiC and very low-doped Si are presented. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Hofmann, T.; Schubert, M.] Univ Nebraska Lincoln, Dept Elect Engn, Lincoln, NE 68588 USA.
[Hofmann, T.; Schubert, M.] Univ Nebraska Lincoln, Nebraska Ctr Mat & Nanosci, Lincoln, NE USA.
[Tedesco, J. L.; Gaskill, D. K.] USN, Res Lab, Washington, DC 20375 USA.
[Herzinger, C. M.; Woollam, J. A.] JA Woollam Co Inc, Lincoln, NE 68508 USA.
RP Hofmann, T (reprint author), Univ Nebraska Lincoln, Dept Elect Engn, Lincoln, NE 68588 USA.
EM thofmann@engr.unl.edu
RI Hofmann, Tino/B-9194-2013; Schubert, Mathias/B-2676-2017
OI Hofmann, Tino/0000-0003-3362-9959; Schubert, Mathias/0000-0001-6238-663X
NR 69
TC 22
Z9 22
U1 4
U2 34
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD FEB 28
PY 2011
VL 519
IS 9
SI SI
BP 2593
EP 2600
DI 10.1016/j.tsf.2010.11.069
PG 8
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 745OG
UT WOS:000289174200006
ER
PT J
AU Gut, IM
Tamilselvam, B
Prouty, AM
Stojkovic, B
Czeschin, S
van der Donk, WA
Blanke, SR
AF Gut, Ian M.
Tamilselvam, Batcha
Prouty, Angela M.
Stojkovic, Bojana
Czeschin, Stephanie
van der Donk, Wilfred A.
Blanke, Steven R.
TI Bacillus anthracis spore interactions with mammalian cells: Relationship
between germination state and the outcome of in vitro
SO BMC MICROBIOLOGY
LA English
DT Article
ID MURINE PRIMARY MACROPHAGES; LUNG EPITHELIAL-CELLS; INHALATION ANTHRAX;
INFECTION; ENDOSPORES; VIVO; INTERNALIZATION; DISSEMINATION;
INACTIVATION; PHAGOCYTOSIS
AB Background: During inhalational anthrax, internalization of Bacillus anthracis spores by host cells within the lung is believed to be a key step for initiating the transition from the localized to disseminated stages of infection. Despite compelling in vivo evidence that spores remain dormant within the bronchioalveolar spaces of the lungs, and germinate only after uptake into host cells, most in vitro studies of infection have been conducted under conditions that promote rapid germination of spores within the culture medium.
Results: Using an in vitro model of infection, we evaluated the influence of the germination state of B. anthracis spores, as controlled by defined culture conditions, on the outcome of infection. Spores prepared from B. anthracis Sterne 7702 germinated in a variety of common cell culture media supplemented with fetal bovine serum (FBS) while, in the absence of FBS, germination was strictly dependent on medium composition. RAW264.7 macrophage-like cells internalized spores to the same extent in either germinating or non-germinating media. However, significantly more viable, intracellular B. anthracis were recovered from cells infected under non-germinating conditions compared to germinating conditions. At the same time, RAW264.7 cells demonstrated a significant loss in viability when infected under non-germinating conditions.
Conclusions: These results suggest that the outcome of host cell infection is sensitive to the germination state of spores at the time of uptake. Moreover, this study demonstrates the efficacy of studying B. anthracis spore infection of host cells within a defined, non-germinating, in vitro environment.
C1 [van der Donk, Wilfred A.] Univ Illinois, Dept Chem, Urbana, IL 61801 USA.
[van der Donk, Wilfred A.] Univ Illinois, Howard Hughes Med Inst, Urbana, IL 61801 USA.
[Gut, Ian M.; Tamilselvam, Batcha; Prouty, Angela M.; Stojkovic, Bojana; Czeschin, Stephanie; Blanke, Steven R.] Univ Illinois, Dept Microbiol, Urbana, IL 61801 USA.
[van der Donk, Wilfred A.; Blanke, Steven R.] Univ Illinois, Inst Genom Biol, Urbana, IL 61801 USA.
[Prouty, Angela M.] USN, Med Res Ctr, Biol Res Directorate, BDRD Annex, Rockville, MD 20852 USA.
[Stojkovic, Bojana] Parkland Coll, Champaign, IL 61821 USA.
RP van der Donk, WA (reprint author), Univ Illinois, Dept Chem, 1209 W Calif St, Urbana, IL 61801 USA.
EM vddonk@illinois.edu; sblanke@life.uiuc.edu
RI Batcha, Tamilselvam/A-8212-2010;
OI Batcha, Tamilselvam/0000-0001-9241-3846; van der Donk,
Wilfred/0000-0002-5467-7071
FU NIH-NIAID [U54AI057156]; National Institutes of Health [5 T32GM070421];
Howard Hughes Medical Institute
FX The authors would like to thank Dr. Barbara Pilas and Ben Montez from
the R. J. Carver Biotechnology Center at the University of
Illinois-Urbana/Champaign (UIUC) for assistance with flow cytometry.
This work was supported by an NIH-NIAID Award to the Western Regional
Center for Excellence for Biodefense and Emerging Infectious Diseases
Research U54AI057156 (SRB; P.I. D. Walker), a Chemical Biology Interface
Training Grant from the National Institutes of Health (5 T32GM070421 to
IMG), and by the Howard Hughes Medical Institute (to WAV).
NR 54
TC 16
Z9 16
U1 1
U2 7
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1471-2180
J9 BMC MICROBIOL
JI BMC Microbiol.
PD FEB 28
PY 2011
VL 11
AR 46
DI 10.1186/1471-2180-11-46
PG 12
WC Microbiology
SC Microbiology
GA 737BZ
UT WOS:000288544600002
PM 21356113
ER
PT J
AU Finkel, P
Bonini, J
Garrity, E
Bussman, K
Gao, J
Li, JF
Lofland, SE
Viehland, D
AF Finkel, P.
Bonini, J.
Garrity, E.
Bussman, K.
Gao, J.
Li, J. F.
Lofland, S. E.
Viehland, D.
TI Enhanced resonant magnetoelectric coupling in frequency-tunable
composite multiferroic bimorph structures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID FILMS
AB We report on a giant tunable enhanced resonant magnetoelectric (ME) coupling in multiferroic magnetostrictive/piezoelectric composite bimorph structures. The approach uses a magnetic/electric field assisted stress-reconfigurable resonance to produce frequency tuning of up to 100%. The studies were performed by laser Doppler spectroscopy. We also show that this principle of a continuously tuned resonance might be used to improve sensitivity for ME magnetic sensors. (C) 2011 American Institute of Physics. [doi:10.1063/1.3560055]
C1 [Finkel, P.] USN, Undersea Warfare Ctr, Newport, RI 02841 USA.
[Bonini, J.; Lofland, S. E.] Rowan Univ, Dept Phys, Glassboro, NJ 08028 USA.
[Garrity, E.] ACR Sci Inc, Lancaster, PA 17491 USA.
[Bussman, K.] USN, Res Lab, Washington, DC 20375 USA.
[Gao, J.; Li, J. F.; Viehland, D.] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA.
RP Finkel, P (reprint author), USN, Undersea Warfare Ctr, Newport, RI 02841 USA.
EM peter.finkel@navy.mil
RI Gao, Junqi/F-2989-2012;
OI Lofland, Samuel/0000-0002-1024-5103
FU NSF [DMR 0520471]
FX The authors would like to acknowledge the full support by the Office of
Naval Research. The authors also appreciate Mr. Kim Benjamin (NUWC) for
discussions and help in sample preparation and design and fabrication of
the loading fixture. S. E. L. acknowledges partial support NSF MRSEC
Grant No. DMR 0520471.
NR 22
TC 13
Z9 13
U1 0
U2 39
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 28
PY 2011
VL 98
IS 9
AR 092905
DI 10.1063/1.3560055
PG 3
WC Physics, Applied
SC Physics
GA 730IJ
UT WOS:000288026700057
ER
PT J
AU Fricker, RD
AF Fricker, Ronald D., Jr.
TI Some methodological issues in biosurveillance
SO STATISTICS IN MEDICINE
LA English
DT Article; Proceedings Paper
CT 12th Biennial Symposium on Statistical Methods
CY APR 06-08, 2009
CL Decatur, GA
DE epidemiologic surveillance; syndromic surveillance; public health
surveillance; bioterrorism
ID PUBLIC-HEALTH SURVEILLANCE; ABERRATION DETECTION METHODS; SYSTEMS;
DISEASE; SIMULATION; OUTBREAKS; MODEL
AB This paper briefly summarizes a short course I gave at the 12th Biennial Centers for Disease Control and Prevention (CDC) and Agency for Toxic Substances and Disease Registry (ATSDR) Symposium held in Decatur, Georgia on April 6, 2009. The goal of this short course was to discuss various methodological issues of biosurveillance detection algorithms, with a focus on the issues related to developing, evaluating, and implementing such algorithms. The PowerPoint slides from the complete talk can be accessed at http://faculty.nps.edu/rdfricke/Biosurveillance.htm. Published in 2011 by John Wiley & Sons, Ltd.
C1 USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
RP Fricker, RD (reprint author), USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
EM rdfricker@nps.edu
NR 33
TC 13
Z9 13
U1 0
U2 7
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0277-6715
EI 1097-0258
J9 STAT MED
JI Stat. Med.
PD FEB 28
PY 2011
VL 30
IS 5
SI SI
BP 403
EP 415
DI 10.1002/sim.3880
PG 13
WC Mathematical & Computational Biology; Public, Environmental &
Occupational Health; Medical Informatics; Medicine, Research &
Experimental; Statistics & Probability
SC Mathematical & Computational Biology; Public, Environmental &
Occupational Health; Medical Informatics; Research & Experimental
Medicine; Mathematics
GA 724YI
UT WOS:000287612000002
PM 21312208
ER
PT J
AU Fricker, RD
AF Fricker, Ronald D., Jr.
TI Rejoinder: Some methodological issues in biosurveillance
SO STATISTICS IN MEDICINE
LA English
DT Article; Proceedings Paper
CT 12th Biennial Symposium on Statistical Methods
CY APR 06-08, 2009
CL Decatur, GA
DE epidemiologic surveillance; syndromic surveillance; public health
surveillance; bioterrorism
ID SURVEILLANCE; HEALTH
AB This paper is a rejoinder to the commentaries on Some Methodological Issues in Biosurveillance. Published in 2011 by John Wiley & Sons, Ltd.
C1 USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
RP Fricker, RD (reprint author), USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
EM rdfricker@nps.edu
NR 13
TC 2
Z9 2
U1 0
U2 0
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0277-6715
EI 1097-0258
J9 STAT MED
JI Stat. Med.
PD FEB 28
PY 2011
VL 30
IS 5
SI SI
BP 434
EP 441
DI 10.1002/sim.3982
PG 8
WC Mathematical & Computational Biology; Public, Environmental &
Occupational Health; Medical Informatics; Medicine, Research &
Experimental; Statistics & Probability
SC Mathematical & Computational Biology; Public, Environmental &
Occupational Health; Medical Informatics; Research & Experimental
Medicine; Mathematics
GA 724YI
UT WOS:000287612000008
ER
PT J
AU Lin, II
Hu, CM
Li, YH
Ho, TY
Fischer, TP
Wong, GTF
Wu, JF
Huang, CW
Chu, DA
Ko, DS
Chen, JP
AF Lin, I. -I.
Hu, Chuanmin
Li, Yuan-Hui
Ho, Tung-Yuan
Fischer, Tobias P.
Wong, George T. F.
Wu, Jingfeng
Huang, Chih-Wei
Chu, D. Allen
Ko, Dong S.
Chen, Jen-Ping
TI Fertilization potential of volcanic dust in the low-nutrient
low-chlorophyll western North Pacific subtropical gyre: Satellite
evidence and laboratory study
SO GLOBAL BIOGEOCHEMICAL CYCLES
LA English
DT Article
ID SOUTH CHINA SEA; ANATAHAN VOLCANO; MARIANA ISLANDS; 2003 ERUPTION;
NITROGEN-FIXATION; MARINE-PHYTOPLANKTON; PHOSPHATE-DEPLETION; COASTAL
WATERS; ATLANTIC-OCEAN; SURFACE OCEAN
AB In the western North Pacific subtropical ocean, the Anatahan volcano of the Mariana Islands erupted on 10 May 2003 for the first time in recorded history. Based on nine different types of remote sensing data provided by NASA, laboratory experiment of the Anatahan samples, and a 3-D ocean circulation model developed by the U.S. Naval Research Laboratory, the postvolcanic ocean biogeochemical response to the Anatahan eruption was explored. It was observed that soon after the eruption, the aerosol optical depth abruptly increased from the pre-eruption loading of similar to 0.1 to similar to 2. In the week following the eruption, a "bloom-like" patch was observed by NASA's Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) ocean color sensor. Based on the chlorophyll a, fluorescence line height (FLH), at-sensor total radiance, and normalized water-leaving radiance data obtained by MODIS, the cause of the bloom-like patch was diagnosed. The results suggest that the patch was most likely a mixture of suspended volcanic particles and a phytoplankton bloom. FLH was found to be similar to 9-17 x 10(-3) mW cm(-2) mu m(-1) sr(-1) in the patch and similar to 3-5 x 10-3 mW cm(-2) mu m(-1) sr(-1) in the ambient water, indicating that a 2-5-fold increase in biological activity occurred during the week following the eruption. Satellite altimetry indicated that the bloom took place in the presence of downwelling and was not a result of upwelled nutrients in this oligotrophic ocean. Analysis of satellite ocean color spectra of the bloom region found similar spectra as the reference Trichodesmium spectra. Laboratory experiments further substantiate the satellite observations which show elevated concentrations of limiting nutrients provided by the Anatahan samples, and the averaged soluble nitrate, phosphate, and Fe were 42, 3.1, and 2.0 nM, respectively. Though it was not possible to obtain in situ observations of the ocean biogeochemical responses that followed the Anatahan eruption, this study provided evidence based on remote sensing data and laboratory experiment that fertilization of volcanic aerosols occurred following this eruption in one of the most oligotrophic low-nutrient low-chlorophyll ocean deserts on Earth.
C1 [Lin, I. -I.; Huang, Chih-Wei; Chen, Jen-Ping] Natl Taiwan Univ, Dept Atmospher Sci, Taipei 106, Taiwan.
[Hu, Chuanmin] Univ S Florida, Coll Marine Sci, St Petersburg, FL 33701 USA.
[Li, Yuan-Hui] Univ Hawaii Manoa, Dept Oceanog, Sch Ocean & Earth Sci & Technol, Honolulu, HI 96822 USA.
[Ho, Tung-Yuan; Wong, George T. F.; Huang, Chih-Wei] Acad Sinica, Res Ctr Environm Changes, Taipei 115, Taiwan.
[Fischer, Tobias P.] Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA.
[Wong, George T. F.] Natl Cent Univ, Inst Hydrol & Ocean Sci, Jhongli, Taiwan.
[Wu, Jingfeng] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33149 USA.
[Chu, D. Allen] NASA, Goddard Space Flight Ctr, Goddard Earth Sci & Technol Ctr, Greenbelt, MD 20771 USA.
[Ko, Dong S.] USN, Res Lab, Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
RP Lin, II (reprint author), Natl Taiwan Univ, Dept Atmospher Sci, 1,Sect 4,Roosevelt Rd, Taipei 106, Taiwan.
EM iilin@as.ntu.edu.tw
RI ChaoMing, Hu/C-3884-2011; Wu, Jingfeng/B-1301-2012; hu,
chuanmin/J-5021-2012; Lin, I-I/J-4695-2013; Chen, Jen-Ping/F-2947-2010;
Ho, Tung-Yuan/F-2323-2017
OI Lin, I-I/0000-0002-8364-8106; Chen, Jen-Ping/0000-0003-4188-6189;
FU National Science Council of Taiwan [NSC97-2111-M-002-014-MY3,
NSC-98-2611-M-002-014-MY3]; U.S. NASA; Academia Sinica, Taiwan
FX We thank the U. S. NASA, Remote Sensing Systems, and the U. S. NOAA for
providing remote sensing data. Thanks to Jennifer A. Wade (Boson
University, USA) for helpful information. This work is primarily
supported by the National Science Council of Taiwan through the
Long-term Observation and Research of the East China Sea grants
NSC97-2111-M-002-014-MY3 (Lin) and NSC-98-2611-M-002-014-MY3 (Lin) and
by the U.S. NASA Ocean Biology and Biogeochemistry program. Additional
support was through NSC 96-2611-M-001-003-MY3 (Wong) and
NSC98-2611-M-001-004-MY3 (Wong) and a thematic research grant entitled
"Atmospheric Forcing on Ocean Biogeochemistry (AFOBi)" by the Academia
Sinica, Taiwan (Wong and Lin).
NR 69
TC 29
Z9 31
U1 1
U2 18
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0886-6236
J9 GLOBAL BIOGEOCHEM CY
JI Glob. Biogeochem. Cycle
PD FEB 26
PY 2011
VL 25
AR GB1006
DI 10.1029/2009GB003758
PG 12
WC Environmental Sciences; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Environmental Sciences & Ecology; Geology; Meteorology & Atmospheric
Sciences
GA 727NP
UT WOS:000287808200001
ER
PT J
AU Opeka, M
Zaykoski, J
Talmy, I
Causey, S
AF Opeka, Mark
Zaykoski, James
Talmy, Inna
Causey, Sam
TI Synthesis and characterization of Zr2SC ceramics
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Ceramics; Zr2SC; Synthesis; Hot pressing; Mechanical characterization;
SEM
AB MAX-phase Zr2SC ceramics were synthesized by hot pressing mixtures containing ZrH2, carbon or ZrC, and ZrS2, WS2, or FeS2 as sulfur sources. The Zr2SC synthesized with FeS2 had a typical MAX-phase laminated structure, good thermal shock resistance, thermal stability to 2100 degrees C, and were readily machineable. The flexural strength was about 250 MPa up to 800 degrees C. The thermal expansion coefficient was 8.8 x 10(-6)/degrees C in the 25-2000 degrees C-temperature range, thermal conductivity was 38 W/m-K at 100 degrees C and about 30 W/m-K at 1100 degrees C, and specific heat at temperatures from 100 to 1100 degrees C ranged from 0.4 to 0.5 kJ/kg degrees C. Load-deflection curves exhibited plastic deformation from RT to 2066 degrees C. The sample deflection at fracture demonstrated significant dependence on temperature with a minimum at 1510 degrees C. In arc heater testing at 2150 degrees C for 23 s, the material developed an adherent, protective scale. Published by Elsevier B.V.
C1 [Opeka, Mark; Zaykoski, James; Talmy, Inna] USN, Ctr Surface Warfare, Carderock Div, Bethesda, MD USA.
[Causey, Sam] So Res Inst, Birmingham, AL 35255 USA.
RP Talmy, I (reprint author), USN, Ctr Surface Warfare, Carderock Div, Bethesda, MD USA.
EM inna.talmy@navy.mil
FU Office of Naval Research; U.S. Department of Energy, Office of Basic
Energy Sciences [DE-AC02-98CH10886]
FX This work was supported by the Office of Naval Research (Dr. S. Fishman
and Dr. D. Shiffler). The authors thank Dr. A. Mansour (NSWCCD) for
conducting and interpreting XAS experiments at the National Synchrotron
Light Source of Brookhaven National Laboratory, which is supported by
the U.S. Department of Energy, Office of Basic Energy Sciences, under
contract No. DE-AC02-98CH10886. The authors also thank the students: R.
Maire, S. Salvati, and J. Langman for participating in the experiments.
NR 12
TC 5
Z9 5
U1 3
U2 19
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD FEB 25
PY 2011
VL 528
IS 4-5
BP 1994
EP 2001
DI 10.1016/j.msea.2010.10.084
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 716UL
UT WOS:000286998900011
ER
PT J
AU Hemmer, PR
Miles, RB
Polynkin, P
Siebert, T
Sokolov, AV
Sprangle, P
Scully, MO
AF Hemmer, Philip R.
Miles, Richard B.
Polynkin, Pavel
Siebert, Torsten
Sokolov, Alexei V.
Sprangle, Phillip
Scully, Marlan O.
TI Standoff spectroscopy via remote generation of a backward-propagating
laser beam
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE air laser; atmospheric surveillance; threat detection; Raman
ID TRANSPARENT MEDIA; AIR; FILAMENTS; PULSES; SUPERRADIANCE; OSCILLATION;
LIGHT
AB In an earlier publication we demonstrated that by using pairs of pulses of different colors (e.g., red and blue) it is possible to excite a dilute ensemble of molecules such that lasing and/or gain-swept superradiance is realized in a direction toward the observer. This approach is a conceptual step toward spectroscopic probing at a distance, also known as standoff spectroscopy. In the present paper, we propose a related but simpler approach on the basis of the backward-directed lasing in optically excited dominant constituents of plain air, N(2) and O(2). This technique relies on the remote generation of a weakly ionized plasma channel through filamentation of an ultraintense femtosecond laser pulse. Subsequent application of an energetic nanosecond pulse or series of pulses boosts the plasma density in the seed channel via avalanche ionization. Depending on the spectral and temporal content of the driving pulses, a transient population inversion is established in either nitrogen- or oxygen-ionized molecules, thus enabling a transient gain for an optical field propagating toward the observer. This technique results in the generation of a strong, coherent, counter-propagating optical probe pulse. Such a probe, combined with a wavelength-tunable laser signal(s) propagating in the forward direction, provides a tool for various remote-sensing applications. The proposed technique can be enhanced by combining it with the gain-swept excitation approach as well as with beam shaping and adaptive optics techniques.
C1 [Hemmer, Philip R.; Siebert, Torsten; Sokolov, Alexei V.; Scully, Marlan O.] Texas A&M Univ, College Stn, TX 77843 USA.
[Miles, Richard B.; Scully, Marlan O.] Princeton Univ, Princeton, NJ 08544 USA.
[Polynkin, Pavel; Scully, Marlan O.] Univ Arizona, Tucson, AZ 85721 USA.
[Siebert, Torsten] Free Univ Berlin, D-14195 Berlin, Germany.
[Sprangle, Phillip] USN, Res Lab, Washington, DC 20375 USA.
RP Scully, MO (reprint author), Texas A&M Univ, College Stn, TX 77843 USA.
EM scully@tamu.edu
FU National Science Foundation [EEC-0540832]; Office of Naval Research;
Robert A. Welch Foundation [A-1261, A-1547]; US Air Force Office of
Scientific Research [FA9550-10-1-0237, FA9550-10-1-0561]
FX We gratefully acknowledge support for this work by National Science
Foundation Grant EEC-0540832 (MIRTHE ERC), the Office of Naval Research,
and the Robert A. Welch Foundation (A-1261 and A-1547). P. P.
acknowledges support from US Air Force Office of Scientific Research
Grants FA9550-10-1-0237 and FA9550-10-1-0561.
NR 23
TC 75
Z9 77
U1 3
U2 33
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD FEB 22
PY 2011
VL 108
IS 8
BP 3130
EP 3134
DI 10.1073/pnas.1014401107
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 724ML
UT WOS:000287580400015
PM 21297033
ER
PT J
AU Noutsos, A
Abdo, AA
Ackermann, M
Ajello, M
Ballet, J
Barbiellini, G
Baring, MG
Bastieri, D
Bechtol, K
Bellazzini, R
Berenji, B
Bonamente, E
Borgland, AW
Bregeon, J
Brez, A
Brigida, M
Bruel, P
Buehler, R
Busetto, G
Caliandro, GA
Cameron, RA
Camilo, F
Caraveo, PA
Casandjian, JM
Cecchi, C
Celik, O
Chaty, S
Chekhtman, A
Chiang, J
Ciprini, S
Claus, R
Cognard, I
Cohen-Tanugi, J
Colafrancesco, S
Cutini, S
Dermer, CD
de Palma, F
Drell, PS
Dumora, D
Ea, CM
Favuzzi, C
Ferrara, EC
Focke, WB
Frailis, M
Freire, PCC
Fukazawa, Y
Funk, S
Fusco, P
Gargano, F
Germani, S
Giglietto, N
Giordano, F
Giroletti, M
Godfrey, G
Grandi, P
Grenier, IA
Grove, JE
Guillemot, L
Guiriec, S
Harding, AK
Hughes, RE
Jackson, MS
Johannesson, G
Johnson, AS
Johnson, TJ
Johnson, WN
Johnston, S
Kamae, T
Katagiri, H
Kataoka, J
Knodlseder, J
Kramer, M
Kuss, M
Lande, J
Lee, SH
Longo, F
Loparco, F
Lovellette, MN
Lubrano, P
Lyne, AG
Makeev, A
Marelli, M
Mazziotta, MN
McEnery, JE
Mehault, J
Michelson, PF
Mizuno, T
Monte, C
Monzani, ME
Morselli, A
Moskalenko, IV
Murgia, S
Naumann-Godo, M
Nolan, PL
Nuss, E
Ohsugi, T
Okumura, A
Omodei, N
Orlando, E
Ormes, JF
Panetta, JH
Parent, D
Pelassa, V
Pepe, M
Persic, M
Pesce-Rollins, M
Piron, F
Porter, TA
Raino, S
Ray, PS
Razzano, M
Reimer, A
Reimer, O
Reposeur, T
Romani, RW
Sadrozinski, HFW
Sander, A
Parkinson, PMS
Sgro, C
Siskind, EJ
Smith, DA
Smith, PD
Spandre, G
Spinelli, P
Stappers, BW
Strickman, MS
Suson, DJ
Takahashi, H
Tanaka, T
Theureau, G
Thompson, DJ
Thorsett, SE
Tibolla, O
Torres, DF
Tramacere, A
Usher, TL
Vandenbroucke, J
Vianello, G
Vilchez, N
Villata, M
Vitale, V
von Kienlin, A
Waite, AP
Wang, P
Watters, K
Weltevrede, P
Winer, BL
Wood, KS
Ziegler, M
AF Noutsos, A.
Abdo, A. A.
Ackermann, M.
Ajello, M.
Ballet, J.
Barbiellini, G.
Baring, M. G.
Bastieri, D.
Bechtol, K.
Bellazzini, R.
Berenji, B.
Bonamente, E.
Borgland, A. W.
Bregeon, J.
Brez, A.
Brigida, M.
Bruel, P.
Buehler, R.
Busetto, G.
Caliandro, G. A.
Cameron, R. A.
Camilo, F.
Caraveo, P. A.
Casandjian, J. M.
Cecchi, C.
Celik, Oe
Chaty, S.
Chekhtman, A.
Chiang, J.
Ciprini, S.
Claus, R.
Cognard, I.
Cohen-Tanugi, J.
Colafrancesco, S.
Cutini, S.
Dermer, C. D.
de Palma, F.
Drell, P. S.
Dumora, D.
Ea, C. M.
Favuzzi, C.
Ferrara, E. C.
Focke, W. B.
Frailis, M.
Freire, P. C. C.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Germani, S.
Giglietto, N.
Giordano, F.
Giroletti, M.
Godfrey, G.
Grandi, P.
Grenier, I. A.
Grove, J. E.
Guillemot, L.
Guiriec, S.
Harding, A. K.
Hughes, R. E.
Jackson, M. S.
Johannesson, G.
Johnson, A. S.
Johnson, T. J.
Johnson, W. N.
Johnston, S.
Kamae, T.
Katagiri, H.
Kataoka, J.
Knoedlseder, J.
Kramer, M.
Kuss, M.
Lande, J.
Lee, S-H.
Longo, F.
Loparco, F.
Lovellette, M. N.
Lubrano, P.
Lyne, A. G.
Makeev, A.
Marelli, M.
Mazziotta, M. N.
McEnery, J. E.
Mehault, J.
Michelson, P. F.
Mizuno, T.
Monte, C.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Murgia, S.
Naumann-Godo, M.
Nolan, P. L.
Nuss, E.
Ohsugi, T.
Okumura, A.
Omodei, N.
Orlando, E.
Ormes, J. F.
Panetta, J. H.
Parent, D.
Pelassa, V.
Pepe, M.
Persic, M.
Pesce-Rollins, M.
Piron, F.
Porter, T. A.
Raino, S.
Ray, P. S.
Razzano, M.
Reimer, A.
Reimer, O.
Reposeur, T.
Romani, R. W.
Sadrozinski, H. F-W
Sander, A.
Parkinson, P. M. Saz
Sgro, C.
Siskind, E. J.
Smith, D. A.
Smith, P. D.
Spandre, G.
Spinelli, P.
Stappers, B. W.
Strickman, M. S.
Suson, D. J.
Takahashi, H.
Tanaka, T.
Theureau, G.
Thompson, D. J.
Thorsett, S. E.
Tibolla, O.
Torres, D. F.
Tramacere, A.
Usher, T. L.
Vandenbroucke, J.
Vianello, G.
Vilchez, N.
Villata, M.
Vitale, V.
von Kienlin, A.
Waite, A. P.
Wang, P.
Watters, K.
Weltevrede, P.
Winer, B. L.
Wood, K. S.
Ziegler, M.
TI RADIO AND gamma-RAY CONSTRAINTS ON THE EMISSION GEOMETRY AND BIRTHPLACE
OF PSR J2043+2740
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE gamma rays: stars; pulsars: individual (PSR J2043+2740)
ID LARGE-AREA TELESCOPE; FERMI-LAT OBSERVATIONS; CYGNUS LOOP; SUPERNOVA
REMNANT; SPACE-TELESCOPE; VELOCITY VECTORS; PROPER-MOTION; LIGHT CURVES;
VELA PULSAR; POLARIZATION
AB We report on the first year of Fermi gamma-ray observations of pulsed high-energy emission from the old PSR J2043 + 2740. The study of the gamma-ray efficiency of such old pulsars gives us an insight into the evolution of pulsars' ability to emit in gamma rays as they age. The gamma-ray light curve of this pulsar above 0.1 GeV is clearly defined by two sharp peaks, 0.353 +/- 0.035 periods apart. We have combined the gamma-ray profile characteristics of PSR J2043 + 2740 with the geometrical properties of the pulsar's radio emission, derived from radio-polarization data, and constrained the pulsar-beam geometry in the framework of a two-pole caustic (TPC) and an outer gap (OG) model. The ranges of magnetic inclination and viewing angle were determined to be {alpha, zeta} similar to {52 degrees-57 degrees, 61 degrees-68 degrees} for the TPC model, and {alpha, zeta} similar to {62 degrees-73 degrees, 74 degrees-81 degrees} and {alpha, zeta} similar to {72 degrees-83 degrees, 60 degrees-75 degrees} for the OG model. Based on this geometry, we assess possible birth locations for this pulsar and derive a likely proper motion, sufficiently high to be measurable with VLBI. At a characteristic age of 1.2 Myr, PSR J2043 + 2740 is the third oldest of all discovered, non-recycled, gamma-ray pulsars: it is twice as old as the next oldest, PSR J0357 + 32, and younger only than the recently discovered PSR J1836 + 5925 and PSR J2055 + 25, both of which are at least five and ten times less energetic, respectively.
C1 [Noutsos, A.; Freire, P. C. C.; Guillemot, L.; Kramer, M.] Max Planck Inst Radioastron, D-53121 Bonn, Germany.
[Noutsos, A.; Ea, C. M.; Kramer, M.; Lyne, A. G.; Stappers, B. W.; Weltevrede, P.] Univ Manchester, Jodrell Bank Ctr Astrophys, Sch Phys & Astron, Manchester M13 9PL, Lancs, England.
[Abdo, A. A.; Chekhtman, A.; Dermer, C. D.; Grove, J. E.; Johnson, W. N.; Lovellette, M. N.; Makeev, A.; Parent, D.; Ray, P. S.; Strickman, M. S.; Wood, K. S.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Abdo, A. A.] Natl Acad Sci, Natl Res Council Res Associate, Washington, DC 20001 USA.
[Ackermann, M.; Ajello, M.; Bechtol, K.; Berenji, B.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Chiang, J.; Claus, R.; Drell, P. S.; Focke, W. B.; Funk, S.; Godfrey, G.; Johannesson, G.; Johnson, A. S.; Kamae, T.; Lande, J.; Lee, S-H.; Michelson, P. F.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Omodei, N.; Panetta, J. H.; Porter, T. A.; Reimer, A.; Reimer, O.; Romani, R. W.; Smith, P. D.; Tanaka, T.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wang, P.; Watters, K.] Stanford Univ, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA.
[Ackermann, M.; Ajello, M.; Bechtol, K.; Berenji, B.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Chiang, J.; Claus, R.; Drell, P. S.; Focke, W. B.; Funk, S.; Godfrey, G.; Johannesson, G.; Johnson, A. S.; Kamae, T.; Lande, J.; Lee, S-H.; Michelson, P. F.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Omodei, N.; Panetta, J. H.; Porter, T. A.; Reimer, A.; Reimer, O.; Romani, R. W.; Smith, P. D.; Tanaka, T.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wang, P.; Watters, K.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[Ballet, J.; Casandjian, J. M.; Chaty, S.; Grenier, I. A.; Naumann-Godo, M.] Univ Paris Diderot, CEA Saclay, Lab AIM,Serv Astrophys, CEA IRFU CNRS, F-91191 Gif Sur Yvette, France.
[Barbiellini, G.; Longo, F.; Persic, M.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Barbiellini, G.; Longo, F.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
[Baring, M. G.] Rice Univ, Dept Phys & Astron, Houston, TX 77251 USA.
[Bastieri, D.; Busetto, G.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Bastieri, D.; Busetto, G.] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
[Bellazzini, R.; Bregeon, J.; Brez, A.; Kuss, M.; Pesce-Rollins, M.; Razzano, M.; Sgro, C.; Spandre, G.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Bonamente, E.; Cecchi, C.; Germani, S.; Lubrano, P.; Pepe, M.] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.
[Bonamente, E.; Cecchi, C.; Ciprini, S.; Germani, S.; Lubrano, P.; Pepe, M.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Univ & Politecn Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; Monte, C.; Raino, S.; Spinelli, P.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Bruel, P.] Ecole Polytech, CNRS, Lab Leprince Ringuet, IN2P3, F-91128 Palaiseau, France.
[Caliandro, G. A.; Torres, D. F.] Inst Ciencies Espai IEEC CSIC, Barcelona 08193, Spain.
[Camilo, F.] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA.
[Caraveo, P. A.; Marelli, M.] INAF Ist Astrofis Spaziale & Fis, I-20133 Milan, Italy.
[Celik, Oe; Ferrara, E. C.; Harding, A. K.; Johnson, T. J.; McEnery, J. E.; Thompson, D. J.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Celik, Oe] CRESST, Greenbelt, MD 20771 USA.
[Celik, Oe] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
[Celik, Oe] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA.
[Chekhtman, A.; Makeev, A.; Parent, D.] George Mason Univ, Fairfax, VA 22030 USA.
[Cognard, I.; Theureau, G.] CNRS, LPCE, UMR 6115, F-45071 Orleans 02, France.
[Cognard, I.; Theureau, G.] Observ Paris, Stn Radioastron Nancay, CNRS, INSU, F-18330 Nancay, France.
[Cohen-Tanugi, J.; Mehault, J.; Nuss, E.; Pelassa, V.; Piron, F.] Univ Montpellier 2, Lab Phys Theor & Astroparticules, CNRS, IN2P3, Montpellier, France.
[Colafrancesco, S.; Cutini, S.] ASI, Sci Data Ctr, I-00044 Frascati, Roma, Italy.
[Dumora, D.; Reposeur, T.; Smith, D. A.] Univ Bordeaux 1, CNRS, Ctr Etud Nucl Bordeaux Gradignan, IN2P3, F-33175 Gradignan, France.
[Frailis, M.] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy.
[Frailis, M.] Ist Nazl Fis Nucl, Sez Trieste, Grp Coll Udine, I-33100 Udine, Italy.
[Frailis, M.; Persic, M.] Osserv Astron Trieste, Ist Nazl Astrofis, I-34143 Trieste, Italy.
[Fukazawa, Y.; Katagiri, H.; Mizuno, T.] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan.
[Giroletti, M.] INAF Ist Radioastron, I-40129 Bologna, Italy.
[Guiriec, S.] Univ Alabama, CSPAR, Huntsville, AL 35899 USA.
[Hughes, R. E.; Sander, A.; Winer, B. L.] Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA.
[Jackson, M. S.] AlbaNova, Dept Phys, Royal Inst Technol KTH, SE-10691 Stockholm, Sweden.
[Jackson, M. S.] AlbaNova, Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.
[Johnson, T. J.; McEnery, J. E.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[Johnson, T. J.; McEnery, J. E.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Johnston, S.] CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia.
[Kataoka, J.] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan.
[Knoedlseder, J.; Vilchez, N.] CNRS, Ctr Etud Spatiale Rayonnements, UPS, F-31028 Toulouse 4, France.
[Morselli, A.; Vitale, V.] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.
[Ohsugi, T.; Takahashi, H.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan.
[Okumura, A.] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan.
[Orlando, E.; von Kienlin, A.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Ormes, J. F.] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria.
[Sadrozinski, H. F-W; Parkinson, P. M. Saz; Thorsett, S. E.; Ziegler, M.] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA.
[Sadrozinski, H. F-W; Parkinson, P. M. Saz; Thorsett, S. E.; Ziegler, M.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Siskind, E. J.] NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA.
[Suson, D. J.] Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA.
[Tibolla, O.] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany.
[Torres, D. F.] ICREA, Barcelona, Spain.
[Tramacere, A.; Vianello, G.] CIFS, I-10133 Turin, Italy.
[Tramacere, A.] INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland.
[Villata, M.] Osserv Astron Torino, INAF, I-10025 Pino Torinese, TO, Italy.
[Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
RP Villata, M (reprint author), Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany.
EM anoutsos@mpifr-bonn.mpg.de; guillemo@mpifr-bonn.mpg.de
RI Mazziotta, Mario /O-8867-2015; Sgro, Carmelo/K-3395-2016; Torres,
Diego/O-9422-2016; Orlando, E/R-5594-2016; Thompson, David/D-2939-2012;
Harding, Alice/D-3160-2012; Loparco, Francesco/O-8847-2015; Gargano,
Fabio/O-8934-2015; Moskalenko, Igor/A-1301-2007; McEnery,
Julie/D-6612-2012; lubrano, pasquale/F-7269-2012; Morselli,
Aldo/G-6769-2011; Kuss, Michael/H-8959-2012; giglietto,
nicola/I-8951-2012; Reimer, Olaf/A-3117-2013; Johnson, Neil/G-3309-2014;
Funk, Stefan/B-7629-2015; Johannesson, Gudlaugur/O-8741-2015
OI Mazziotta, Mario /0000-0001-9325-4672; Torres,
Diego/0000-0002-1522-9065; Grandi, Paola/0000-0003-1848-6013; Giordano,
Francesco/0000-0002-8651-2394; Thorsett, Stephen/0000-0002-2025-9613;
Frailis, Marco/0000-0002-7400-2135; Villata,
Massimo/0000-0003-1743-6946; Caraveo, Patrizia/0000-0003-2478-8018;
Sgro', Carmelo/0000-0001-5676-6214; SPINELLI, Paolo/0000-0001-6688-8864;
Persic, Massimo/0000-0003-1853-4900; Thompson,
David/0000-0001-5217-9135; Loparco, Francesco/0000-0002-1173-5673;
Gargano, Fabio/0000-0002-5055-6395; Moskalenko,
Igor/0000-0001-6141-458X; lubrano, pasquale/0000-0003-0221-4806;
Morselli, Aldo/0000-0002-7704-9553; giglietto,
nicola/0000-0002-9021-2888; Reimer, Olaf/0000-0001-6953-1385; Funk,
Stefan/0000-0002-2012-0080; Johannesson, Gudlaugur/0000-0003-1458-7036
FU Science and Technology Facilities Council of the United Kingdom
FX The Lovell Telescope is owned and operated by the University of
Manchester as part of the Jodrell Bank Centre for Astrophysics with
support from the Science and Technology Facilities Council of the United
Kingdom.
NR 66
TC 6
Z9 6
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 20
PY 2011
VL 728
IS 2
AR 77
DI 10.1088/0004-637X/728/2/77
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 716MP
UT WOS:000286973600004
ER
PT J
AU Tan, LC
Reames, DV
Ng, CK
Shao, X
Wang, LH
AF Tan, Lun C.
Reames, Donald V.
Ng, Chee K.
Shao, Xi
Wang, Linghua
TI WHAT CAUSES SCATTER-FREE TRANSPORT OF NON-RELATIVISTIC SOLAR ELECTRONS?
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE acceleration of particles; magnetohydrodynamics (MHD); Sun: coronal mass
ejections (CMEs); Sun: heliosphere; Sun: particle emission
ID ENERGETIC PARTICLE EVENTS; COSMIC-RAY TRANSPORT; QUASI-LINEAR THEORY;
MAGNETIC-FIELD; INTERPLANETARY TRANSPORT; DISSIPATION RANGE; ALFVEN
WAVES; WIND SPACECRAFT; NEAR-EARTH; TURBULENCE
AB We have examined the cause of the scatter-free transport of non-relativistic solar electrons. Electron scatter-free transport events are compared with the diffusive transport event. The emphasis of our examination is on the energy dependence of electron angular distributions and the steepening of interplanetary magnetic field (IMF) power spectral densities (PSDs). Near and above the proton gyrofrequency, the effects of both R-mode (whistler) and L-mode (electromagnetic ion cyclotron, EMIC) waves need to be taken into account separately. The PSD spectral steepening due to the EMIC wave damping by solar-wind thermal ions becomes essential. In a fast-rise-fast-decay impulsive electron event we have observed such steepening, which significantly reduces PSD levels at frequencies above the proton gyrofrequency. The spectral steepening thus produced favors the occurrence of scatter-free transport of low-energy electrons. Consequently, within the Wind/3D Plasma and Energetic Particle Instrument/Silicon Semiconductor Telescope measured energy range (similar to 25-500 keV), there appears to be an electron energy window, across which the scatter-free transport of lower energy electrons would change to the diffusive transport of higher energy electrons. We have observed such a change and found it is correlated with the occurrence of broken power-law spectra of electrons. Thus the connection between the transition from diffusive to scatter-free electron transport and the concurrent transition from high to low IMF PSD levels with corresponding breaks in the electron power-law energy spectrum and PSD spectrum has been recognized.
C1 [Tan, Lun C.] NASA, Goddard Space Flight Ctr, Heliospher Phys Lab, Greenbelt, MD 20771 USA.
[Reames, Donald V.] Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA.
[Ng, Chee K.] George Mason Univ, Coll Sci, Fairfax, VA 22030 USA.
[Tan, Lun C.; Shao, Xi] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Wang, Linghua] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Ng, Chee K.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Tan, LC (reprint author), NASA, Goddard Space Flight Ctr, Heliospher Phys Lab, Code 672, Greenbelt, MD 20771 USA.
EM ltan@mail.umd.edu
RI Wang, Linghua/C-4938-2014; Shao, Xi/H-9452-2016
OI Wang, Linghua/0000-0001-7309-4325;
FU NASA [NNX10AE90G, NNX08AQ02G, NNX09AU98G, NNX07AF42G, NNX08AE34G]
FX We gratefully acknowledge data provided by the NASA/Space Physics Data
Facility (SPDF) CDAWeb, ACE Science Center, and Wind/3DP Data Center. We
thank A. Szabo for making the Wind/MFI high-resolution data available to
this work. Also, we thank K. Ogilvie, R. Lin, and A. Szabo for their
support of this work, and the anonymous reviewer for his/her valuable
comments. L.C.T. is supported in part by NASA grant NNX10AE90G, D.V.R.
is supported in part by NASA grant NNX08AQ02G. C.K.N. is supported in
part by NASA grant NNX09AU98G. X.S. is supported in part by NASA grant
NNX07AF42G. L.W. is supported in part by NASA grant NNX08AE34G.
NR 58
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U1 1
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 20
PY 2011
VL 728
IS 2
AR 133
DI 10.1088/0004-637X/728/2/133
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 716MP
UT WOS:000286973600059
ER
PT J
AU Borucki, WJ
Koch, DG
Basri, G
Batalha, N
Boss, A
Brown, TM
Caldwell, D
Christensen-Dalsgaard, J
Cochran, WD
DeVore, E
Dunham, EW
Dupree, AK
Gautier, TN
Geary, JC
Gilliland, R
Gould, A
Howell, SB
Jenkins, JM
Kjeldsen, H
Latham, DW
Lissauer, JJ
Marcy, GW
Monet, DG
Sasselov, D
Tarter, J
Charbonneau, D
Doyle, L
Ford, EB
Fortney, J
Holman, MJ
Seager, S
Steffen, JH
Welsh, WF
Allen, C
Bryson, ST
Buchhave, L
Chandrasekaran, H
Christiansen, JL
Ciardi, D
Clarke, BD
Dotson, JL
Endl, M
Fischer, D
Fressin, F
Haas, M
Horch, E
Howard, A
Isaacson, H
Kolodziejczak, J
Li, J
MacQueen, P
Meibom, S
Prsa, A
Quintana, EV
Rowe, J
Sherry, W
Tenenbaum, P
Torres, G
Twicken, JD
Van Cleve, J
Walkowicz, L
Wu, H
AF Borucki, William J.
Koch, David G.
Basri, Gibor
Batalha, Natalie
Boss, Alan
Brown, Timothy M.
Caldwell, Douglas
Christensen-Dalsgaard, Jorgen
Cochran, William D.
DeVore, Edna
Dunham, Edward W.
Dupree, Andrea K.
Gautier, Thomas N., III
Geary, John C.
Gilliland, Ronald
Gould, Alan
Howell, Steve B.
Jenkins, Jon M.
Kjeldsen, Hans
Latham, David W.
Lissauer, Jack J.
Marcy, Geoffrey W.
Monet, David G.
Sasselov, Dimitar
Tarter, Jill
Charbonneau, David
Doyle, Laurance
Ford, Eric B.
Fortney, Jonathan
Holman, Matthew J.
Seager, Sara
Steffen, Jason H.
Welsh, William F.
Allen, Christopher
Bryson, Stephen T.
Buchhave, Lars
Chandrasekaran, Hema
Christiansen, Jessie L.
Ciardi, David
Clarke, Bruce D.
Dotson, Jessie L.
Endl, Michael
Fischer, Debra
Fressin, Francois
Haas, Michael
Horch, Elliott
Howard, Andrew
Isaacson, Howard
Kolodziejczak, Jeffery
Li, Jie
MacQueen, Phillip
Meibom, Soren
Prsa, Andrej
Quintana, Elisa V.
Rowe, Jason
Sherry, William
Tenenbaum, Peter
Torres, Guillermo
Twicken, Joseph D.
Van Cleve, Jeffrey
Walkowicz, Lucianne
Wu, Hayley
TI CHARACTERISTICS OF KEPLER PLANETARY CANDIDATES BASED ON THE FIRST DATA
SET
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE planets and satellites: detection; surveys
ID TRANSITING PLANET; INITIAL CHARACTERISTICS; TERRESTRIAL PLANETS; CADENCE
DATA; PERFORMANCE; SCIENCE; STAR
AB In the spring of 2009, the Kepler Mission commenced high-precision photometry on nearly 156,000 stars to determine the frequency and characteristics of small exoplanets, conduct a guest observer program, and obtain asteroseismic data on a wide variety of stars. On 2010 June 15, the Kepler Mission released most of the data from the first quarter of observations. At the time of this data release, 705 stars from this first data set have exoplanet candidates with sizes from as small as that of Earth to larger than that of Jupiter. Here we give the identity and characteristics of 305 released stars with planetary candidates. Data for the remaining 400 stars with planetary candidates will be released in 2011 February. More than half the candidates on the released list have radii less than half that of Jupiter. Five candidates are present in and near the habitable zone; two near super-Earth size, and three bracketing the size of Jupiter. The released stars also include five possible multi-planet systems. One of these has two Neptune-size (2.3 and 2.5 Earth radius) candidates with near-resonant periods.
C1 [Borucki, William J.; Koch, David G.; Lissauer, Jack J.; Bryson, Stephen T.; Dotson, Jessie L.; Haas, Michael; Rowe, Jason] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
[Basri, Gibor; Marcy, Geoffrey W.; Howard, Andrew; Isaacson, Howard; Walkowicz, Lucianne] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Batalha, Natalie] San Jose State Univ, San Jose, CA 95192 USA.
[Boss, Alan] Carnegie Inst Washington, Washington, DC 20015 USA.
[Brown, Timothy M.] Las Cumbres Observ Global Telescope, Goleta, CA 93117 USA.
[Caldwell, Douglas; DeVore, Edna; Jenkins, Jon M.; Tarter, Jill; Doyle, Laurance; Chandrasekaran, Hema; Christiansen, Jessie L.; Clarke, Bruce D.; Li, Jie; Quintana, Elisa V.; Tenenbaum, Peter; Twicken, Joseph D.; Van Cleve, Jeffrey; Wu, Hayley] SETI Inst, Mountain View, CA 94043 USA.
[Christensen-Dalsgaard, Jorgen; Kjeldsen, Hans] Aarhus Univ, Aarhus, Denmark.
[Cochran, William D.; Endl, Michael; MacQueen, Phillip] Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA.
[Dunham, Edward W.] Lowell Observ, Flagstaff, AZ 86001 USA.
[Dupree, Andrea K.; Geary, John C.; Latham, David W.; Sasselov, Dimitar; Charbonneau, David; Holman, Matthew J.; Buchhave, Lars; Fressin, Francois; Meibom, Soren; Torres, Guillermo] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Gautier, Thomas N., III] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Gilliland, Ronald] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Gould, Alan] Lawrence Hall Sci, Berkeley, CA 94720 USA.
[Howell, Steve B.; Sherry, William] Natl Opt Astron Observ, Tucson, AZ 85719 USA.
[Monet, David G.] USN Observ, Flagstaff, AZ 86001 USA.
[Ford, Eric B.] Univ Florida, Gainesville, FL 32611 USA.
[Fortney, Jonathan] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
[Seager, Sara] MIT, Cambridge, MA 02139 USA.
[Steffen, Jason H.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Welsh, William F.] San Diego State Univ, San Diego, CA 92182 USA.
[Allen, Christopher] Orbital Sci Corp, Mountain View, CA 94043 USA.
[Ciardi, David] Exoplanet Sci Inst Caltech, Pasadena, CA 91125 USA.
[Fischer, Debra] Yale Univ, New Haven, CT 06520 USA.
[Horch, Elliott] So Connecticut State Univ, New Haven, CT 06515 USA.
[Kolodziejczak, Jeffery] MSFC, Huntsville, AL 35805 USA.
[Prsa, Andrej] Villanova Univ, Villanova, PA 19085 USA.
RP Borucki, WJ (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM William.J.Borucki@nasa.gov
RI Caldwell, Douglas/L-7911-2014; Howard, Andrew/D-4148-2015;
OI Caldwell, Douglas/0000-0003-1963-9616; Howard,
Andrew/0000-0001-8638-0320; Fortney, Jonathan/0000-0002-9843-4354;
Buchhave, Lars A./0000-0003-1605-5666; Ciardi,
David/0000-0002-5741-3047; /0000-0001-6545-639X; Fischer,
Debra/0000-0003-2221-0861
FU NASA's Science Mission Directorate; W. M. Keck Foundation
FX Kepler was competitively selected as the 10th Discovery mission. Funding
for this mission is provided by NASA's Science Mission Directorate. Some
of the data presented herein were obtained at the W. M. Keck
Observatory, which is operated as a scientific partnership among the
California Institute of Technology, the University of California, and
the National Aeronautics and Space Administration. The Observatory was
made possible by the generous financial support of the W. M. Keck
Foundation. The authors thank the many people who gave so generously of
their time to make this mission a success.
NR 30
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U1 0
U2 17
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 20
PY 2011
VL 728
IS 2
AR 117
DI 10.1088/0004-637X/728/2/117
PG 20
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 716MP
UT WOS:000286973600043
ER
PT J
AU Gillaspy, JD
Lin, T
Tedesco, L
Tan, JN
Pomeroy, JM
Laming, JM
Brickhouse, N
Chen, GX
Silver, E
AF Gillaspy, J. D.
Lin, T.
Tedesco, L.
Tan, J. N.
Pomeroy, J. M.
Laming, J. M.
Brickhouse, N.
Chen, G. -X.
Silver, E.
TI Fe XVII X-RAY LINE RATIOS FOR ACCURATE ASTROPHYSICAL PLASMA DIAGNOSTICS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE atomic data; atomic processes; line: formation; opacity; plasmas;
X-rays: general
ID BEAM ION-TRAP; PHOTOIONIZATION CROSS-SECTIONS; LABORATORY MEASUREMENTS;
COLLISION STRENGTHS; RELATIVE INTENSITY; RATE COEFFICIENTS; TRANSITIONS;
EMISSION; EBIT; RECOMBINATION
AB New laboratory measurements using an electron beam ion trap and an X-ray microcalorimeter are presented for the n = 3 to n = 2 Fe XVII emission lines in the 15-17 angstrom range, along with new theoretical predictions for a variety of electron energy distributions. This work improves upon our earlier work on these lines by providing measurements at more electron-impact energies (seven values from 846 to 1185 eV), performing an in situ determination of the X-ray window transmission, taking steps to minimize the ion impurity concentrations, correcting the electron energies for space charge shifts, and estimating the residual electron energy uncertainties. The results for the 3C/3D and 3s/3C line ratios are generally in agreement with the closest theory to within 10%, and in agreement with previous measurements from an independent group to within 20%. Better consistency between the two experimental groups is obtained at the lowest electron energies by using theory to interpolate, taking into account the significantly different electron energy distributions. Evidence for resonance collision effects in the spectra is discussed. Renormalized values for the absolute cross sections of the 3C and 3D lines are obtained by combining previously published results and shown to be in agreement with the predictions of converged R-matrix theory. This work establishes consistency between results from independent laboratories and improves the reliability of these lines for astrophysical diagnostics. Factors that should be taken into account for accurate diagnostics are discussed, including electron energy distribution, polarization, absorption/scattering, and line blends.
C1 [Gillaspy, J. D.; Tedesco, L.; Tan, J. N.; Pomeroy, J. M.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
[Lin, T.; Brickhouse, N.; Chen, G. -X.; Silver, E.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Laming, J. M.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Gillaspy, JD (reprint author), Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
EM john.gillaspy@nist.gov
RI Sanders, Susan/G-1957-2011;
OI Brickhouse, Nancy/0000-0002-8704-4473
FU NASA [NNX08AK33G]
FX We thank Stuart Loch and Connor Ballance for their calculations (done in
collaboration with Mitch Pindzola and Don Griffin), and Don Landis, Norm
Madden, Jeff Beeman, Eugene Haller, Gerry Austin, and David Caldwell for
contributing to the development of the microcalorimeter. This work is
supported by NASA grant NNX08AK33G.
NR 52
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U1 1
U2 13
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 20
PY 2011
VL 728
IS 2
AR 132
DI 10.1088/0004-637X/728/2/132
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 716MP
UT WOS:000286973600058
ER
PT J
AU Eriksen, KA
Hughes, JP
Badenes, C
Fesen, R
Ghavamian, P
Moffett, D
Plucinksy, PP
Rakowski, CE
Reynoso, EM
Slane, P
AF Eriksen, Kristoffer A.
Hughes, John P.
Badenes, Carles
Fesen, Robert
Ghavamian, Parviz
Moffett, David
Plucinksy, Paul P.
Rakowski, Cara E.
Reynoso, Estela M.
Slane, Patrick
TI EVIDENCE FOR PARTICLE ACCELERATION TO THE KNEE OF THE COSMIC RAY
SPECTRUM IN TYCHO'S SUPERNOVA REMNANT
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE acceleration of particles; cosmic rays; ISM: individual objects (SN
1572, Tycho); ISM: supernova remnants
ID MAGNETIC-FIELD; SHOCK; AMPLIFICATION; CASSIOPEIA; EMISSION; EXPANSION;
ENERGY
AB Supernova remnants (SNRs) have long been assumed to be the source of cosmic rays (CRs) up to the "knee" of the CR spectrum at 10(15) eV, accelerating particles to relativistic energies in their blast waves by the process of diffusive shock acceleration (DSA). Since CR nuclei do not radiate efficiently, their presence must be inferred indirectly. Previous theoretical calculations and X-ray observations show that CR acceleration significantly modifies the structure of the SNR and greatly amplifies the interstellar magnetic field. We present new, deep X-ray observations of the remnant of Tycho's supernova (SN 1572, henceforth Tycho), which reveal a previously unknown, strikingly ordered pattern of non-thermal high-emissivity stripes in the projected interior of the remnant, with spacing that corresponds to the gyroradii of 10(14)-10(15) eV protons. Spectroscopy of the stripes shows the plasma to be highly turbulent on the (smaller) scale of the Larmor radii of TeV energy electrons. Models of the shock amplification of magnetic fields produce structure on the scale of the gyroradius of the highest energy CRs present, but they do not predict the highly ordered pattern we observe. We interpret the stripes as evidence for acceleration of particles to near the knee of the CR spectrum in regions of enhanced magnetic turbulence, while the observed highly ordered pattern of these features provides a new challenge to models of DSA.
C1 [Eriksen, Kristoffer A.; Hughes, John P.] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
[Badenes, Carles] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel.
[Badenes, Carles] Weizmann Inst Sci, Benoziyo Ctr Astrophys, IL-76100 Rehovot, Israel.
[Fesen, Robert] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA.
[Ghavamian, Parviz] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Moffett, David] Furman Univ, Dept Phys, Greenville, SC 29613 USA.
[Plucinksy, Paul P.; Slane, Patrick] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Rakowski, Cara E.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Reynoso, Estela M.] Inst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, Argentina.
[Reynoso, Estela M.] Univ Buenos Aires, Fac Exact & Nat Sci, RA-1053 Buenos Aires, DF, Argentina.
RP Eriksen, KA (reprint author), Rutgers State Univ, Dept Phys & Astron, POB 849, Piscataway, NJ 08854 USA.
FU Rutgers University [GO9-0078X]; CONICET; UBA; ANPCyT
FX This work was partially supported by Chandra award (grant number
GO9-0078X) to Rutgers University. E.M.R. is a member of the CIC
(CONICET) and is funded by the CONICET, UBA, and ANPCyT projects. J.P.H.
acknowledges helpful discussions with Mario Riquelme, Anatoly
Spitkovsky, Tom Jones, Roger Blandford, and Martin Laming. We also thank
Christopher McKee for contributing to the original Chandra proposal.
NR 26
TC 49
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U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD FEB 20
PY 2011
VL 728
IS 2
AR L28
DI 10.1088/2041-8205/728/2/L28
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 715YI
UT WOS:000286931200004
ER
PT J
AU Eigenbrodt, BC
Pomfret, MB
Steinhurst, DA
Owrutsky, JC
Walker, RA
AF Eigenbrodt, Bryan C.
Pomfret, Michael B.
Steinhurst, Daniel A.
Owrutsky, Jeffrey C.
Walker, Robert A.
TI Direct, In Situ Optical Studies of Ni-YSZ Anodes in Solid Oxide Fuel
Cells Operating with Methanol and Methane
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID ELECTROCHEMICAL IMPEDANCE SPECTRA; GAS-PHASE REACTIONS; SOFC ANODES;
HYDROCARBON FUELS; DIRECT-OXIDATION; NATURAL-GAS; ETHANOL; PERFORMANCE;
STEAM; DEPOSITION
AB Near-infrared imaging and vibrational Raman scattering have been used to measure the susceptibility of Ni-based cermet anodes to carbon formation in solid oxide fuel cells (SOFCs) operating with methane and methanol fuels at 715 degrees C. These two complementary optical methods afford previously unavailable opportunities to monitor chemical and physical processes occurring in situ and in real time with molecular specificity and spatial resolution. Imaging and spectroscopic data show that when the cell is held at open circuit voltage carbon forms within one minute of methanol or methane being introduced to the anode chamber. Raman spectra identify these deposits as highly ordered graphite based on a single sharp feature in the vibrational spectrum near 1580 cm(-1). While graphite formed from methane remains highly ordered regardless of exposure duration, graphite formed from sustained exposure to methanol begins to show evidence of structural disorder inferred from the appearance of a weak feature at 1340 cm-1. This lower frequency vibrational band has been assigned previously to the presence of grain boundaries and/or site defects in a graphite lattice. Correlating the growth of intensity in the Raman spectra with exposure time quantifies the kinetics of carbon deposition and suggests that carbon formed from methanol grows via two distinct mechanisms. Thermal imaging data show that carbon deposition is endothermic and reduces anode temperatures. This effect is more pronounced for methanol (Delta T = -5.5 degrees C) than methane (Delta T = -0.5 degrees C). These results agree with data from vibrational Raman experiments showing that exposure to methanol leads to significantly more carbon deposition. Polarizing the cell reduces the amount of carbon deposited. This effect is reversible and more significant for methanol. The effects of the graphite formed from methanol are evident in electrochemical impedance data but less apparent in voltammetry experiments. In contrast, graphite formed from methane has only modest impact on device performance. Collectively, these studies address long-standing questions about the tendency of methanol to form carbon on eletrocatalytic SOFC anodes and the consequences of this chemistry on device performance.
C1 [Walker, Robert A.] Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA.
[Eigenbrodt, Bryan C.] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA.
[Pomfret, Michael B.; Owrutsky, Jeffrey C.] USN, Div Chem, Res Lab, Washington, DC 20375 USA.
[Steinhurst, Daniel A.] Nova Res Inc, Alexandria, VA 22308 USA.
RP Walker, RA (reprint author), Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA.
EM rawalker@chemistry.montana.edu
RI Owrutsky, Jeffrey/K-7649-2012
FU Office of Naval Research [N00014-08-WX-2-0679, N000014-08-10208]
FX This work is supported by the Office of Naval Research
(N00014-08-WX-2-0679 and N000014-08-10208). The authors gratefully
acknowledge helpful discussions with Professor Bryan W. Eichhorn
(University of Maryland) and Professor Anthony M. Dean (Colorado School
of Mines) as well as instrumentation assistance from David A. Kidwell
(Naval Research Laboratory).
NR 50
TC 42
Z9 42
U1 3
U2 58
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD FEB 17
PY 2011
VL 115
IS 6
BP 2895
EP 2903
DI 10.1021/jp109292r
PG 9
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 717RS
UT WOS:000287065700036
ER
PT J
AU Hackett, EE
Luznik, L
Nayak, AR
Katz, J
Osborn, TR
AF Hackett, Erin E.
Luznik, Luksa
Nayak, Aditya R.
Katz, Joseph
Osborn, Thomas R.
TI Field measurements of turbulence at an unstable interface between
current and wave bottom boundary layers
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID DIRECT NUMERICAL SIMULATIONS; PARTICLE IMAGE VELOCIMETRY; VERTICAL
STRUCTURE; OSCILLATORY FLOW; LOCAL ISOTROPY; CHANNEL FLOW; ROUGH; FLUID;
BED; STATISTICS
AB In situ particle image velocimetry measurements, at a resolution of 3.5 Kolmogorov scales, have been performed in the inner part of the coastal bottom boundary layer. The spatial details enable us to directly determine the vertical distributions of mean velocity, Reynolds shear stress, shear production and dissipation rates, energy spectra, and abundance of eddies. Focusing on cases with wave velocity of similar magnitude as the mean current, velocity profiles have logarithmic distributions in the upper half of the sample area. Below the log layer, but well above the bottom ripples, an inflection point appears, indicating a region of flow instability. Based on data interpretation, which includes variations in wave phase with height, this inflection occurs near the interface between current and thinner wave boundary layer (WBL) below it. Scaling of mean velocity profiles with shear velocity and characteristic roughness is effective only above the inflection point, while turbulence parameters scale reasonably well at all elevations. Instabilities associated with the inflection are manifested by a peak in turbulent shear production rate and a rapid increase in small-scale turbulence, as is evident from trends of the dissipation rate, energy spectra, and distribution of eddies with elevation. Therefore, the presence of a WBL generates a shear production peak and rapid increase in the dissipation rate at higher elevations than those found in rough-wall steady boundary layers. Transition between current and wave boundary layers is also characterized by broad Reynolds stress peaks and shear production exceeding the dissipation rate.
C1 [Hackett, Erin E.; Osborn, Thomas R.] Johns Hopkins Univ, Dept Earth & Planetary Sci, Baltimore, MD 21218 USA.
[Nayak, Aditya R.; Katz, Joseph] Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA.
[Luznik, Luksa] USN Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
RP Hackett, EE (reprint author), Johns Hopkins Univ, Dept Earth & Planetary Sci, 301 Olin Hall,3400 N Charles St, Baltimore, MD 21218 USA.
EM katz@jhu.edu
RI Hang, Chen/H-5336-2011; Katz, Joseph/A-7624-2010;
OI Katz, Joseph/0000-0001-9067-2473; Nayak, Aditya/0000-0002-2936-5607
FU NSF [OCE0648490]; ONR
FX This research is sponsored by the NSF Physical Oceanography Program
under grant OCE0648490. E. E. Hackett would like to also express
gratitude to ONR for providing her with a NDSEG fellowship. The authors
would also like to thank Yury Ronzhes, Stephen King, and the captain and
crew of the R/V Hugh R. Sharp for their assistance during the field
experiments.
NR 64
TC 4
Z9 4
U1 0
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9275
EI 2169-9291
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD FEB 16
PY 2011
VL 116
AR C02022
DI 10.1029/2010JC006138
PG 18
WC Oceanography
SC Oceanography
GA 723QE
UT WOS:000287521100001
ER
PT J
AU Koo, HC
Kwon, JH
Eom, J
Chang, J
Han, SH
Johnson, M
AF Koo, Hyun Cheol
Kwon, Jae Hyun
Eom, Jonghwa
Chang, Joonyeon
Han, Suk Hee
Johnson, Mark
TI Gate modulation of spin precession in a semiconductor channel
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article; Proceedings Paper
CT 2nd International Symposium on Advanced Magnetic Materials and
Applications (ISAMMA)
CY JUL 12-16, 2010
CL Sendai, JAPAN
SP ASAKA RIKEN Co Ltd, Fujikin Incorporated, Furukawa Elect Co Ltd, Hitachi Met Ltd, IZUMI-TEC Co Ltd, Miwa Electric Industrial Co Ltd, MIWA MFG Co Ltd, NEOARK Corp, Optima Corp, PRESTO Co Ltd, SHOWA DENKO K K, TAIYO YUDEN Co Ltd, TDK Corp, TEIJIN Ltd, Ube Mat Industries Ltd, ULVAC Inc, V TEX Corp, SENDAI TOURISM & CONVENT BUR, Iwatani Naoji Fdn, Tohoku Univ Electro-Related Dept Global COE Program Ctr Educ & Res Informat Elect Syst, Murata Sci Fdn, Res Fdn Mat Sci, Nippon Sheet Glass Fdn Mat Sci & Engn, Aoba Fdn Promot Engn
ID NONCENTROSYMMETRIC SEMICONDUCTORS; ORBIT INTERACTION; INJECTION;
HETEROSTRUCTURE; RELAXATION; TRANSPORT; ELECTRONS; CHARGE; METAL
AB Gate control of spin precession is experimentally presented in an InAs quantum well with ferromagnetic spin injector and detector. The gate electric field modulates the spin-orbit interaction and spin precession. As a consequence, spin dependent conductance in the InAs channel is controlled by the gate voltage. Using ballistic spin transport theory, gate modulation results are proved to fit very well with gate voltage dependence of Rashba field strength.
C1 [Koo, Hyun Cheol; Kwon, Jae Hyun; Chang, Joonyeon; Han, Suk Hee] Korea Inst Sci & Technol, Nano Convergence Device Ctr, Seoul 136791, South Korea.
[Kwon, Jae Hyun] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore.
[Eom, Jonghwa] Sejong Univ, Dept Phys, Seoul 143747, South Korea.
[Johnson, Mark] USN, Res Lab, Washington, DC 20375 USA.
RP Koo, HC (reprint author), Korea Inst Sci & Technol, Nano Convergence Device Ctr, Seoul 136791, South Korea.
EM hckoo@kist.re.kr
OI Koo, Hyun Cheol/0000-0001-5044-1355
NR 25
TC 6
Z9 6
U1 1
U2 10
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
EI 1361-6463
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD FEB 16
PY 2011
VL 44
IS 6
SI SI
AR 064006
DI 10.1088/0022-3727/44/6/064006
PG 7
WC Physics, Applied
SC Physics
GA 712IK
UT WOS:000286659800007
ER
PT J
AU Capiro, NL
Granbery, EK
Lebron, CA
Major, DW
McMaster, ML
Pound, MJ
Loffler, FE
Pennell, KD
AF Capiro, Natalie L.
Granbery, Emmie K.
Lebron, Carmen A.
Major, David W.
McMaster, Michaye L.
Pound, Michael J.
Loeffler, Frank E.
Pennell, Kurt D.
TI Liquid-Liquid Mass Transfer of Partitioning Electron Donors in
Chlorinated Solvent Source Zones
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID NONAQUEOUS-PHASE LIQUID; SURFACTANT-ENHANCED SOLUBILIZATION; MICROBIAL
REDUCTIVE DECHLORINATION; 2-SITE 2-REGION MODELS; NAPL SOURCE ZONE;
TETRACHLOROETHENE DNAPL; PERFORMANCE ASSESSMENT; RESIDUAL DODECANE; SOIL
COLUMNS; TRACER TEST
AB A combination of batch and column experiments evaluated the mass transfer of two candidate partitioning electron donors (PEDs), n-hexanol (nHex) and n-butyl acetate (nBA), for enhanced bioremediation of trichloroethene (TCE)-dense nonaqueous phase liquid (DNAPL). Completely mixed batch reactor experiments yielded equilibrium TCE-DNAPL and water partition coefficients (K(NW)) for nHex and nBA of 21.7 +/- 0.27 and 330.43 +/- 6.7, respectively, over a range of initial PED concentrations up to the aqueous solubility limit of ca. 5000 mg/L. First order liquid liquid mass transfer rates determined in batch reactors with nBA or nHex concentrations near the aqueous solubility were 0.22 min(-1) and 0.11 min(-1), respectively. Liquid-liquid mass transfer under dynamic flow conditions was assessed in one-dimensional (1-D) abiotic columns packed with Federal Fine Ottawa sand containing a uniform distribution of residual TCE-DNAPL. Following pulse injection of PED solutions at pore-water velocities (v(p)) ranging from 1.2 to 6.0 m/day, effluent concentration measurements demonstrated that both nHex and nBA partitioned strongly into residual TCE-DNAPL with maximum effluent levels not exceeding 35% and 7%, respectively, of the applied concentrations of 4000 to 5000 mg/L. PEDs persisted at effluent concentrations above 5 mg/L for up to 16 and 80 pore volumes for nHex and nBA, respectively. Mathematical simulations yielded K(NW) values ranging from 44.7 to 48.2 and 247 to 291 and liquid-liquid mass transfer rates of 0.01 to 0.03 min(-1) and 0.001 to 0.006 min(-1) for nHex and nBA, respectively. The observed TCE-DNAPL and water mass transfer behavior suggests that a single PED injection can persist in a treated source zone for prolonged time periods, thereby reducing the need for, or frequency of, repeated electron donor injections to support bacteria that derive reducing equivalents for TCE reductive dechlorination from PED fermentation.
C1 [Capiro, Natalie L.; Pennell, Kurt D.] Tufts Univ, Dept Civil & Environm Engn, Medford, MA 02155 USA.
[Granbery, Emmie K.; Loeffler, Frank E.] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA.
[Lebron, Carmen A.] USN, Facil Engn Command, Engn Serv Ctr, Port Hueneme, CA 93043 USA.
[Major, David W.; McMaster, Michaye L.] Geosyntec Consultants, Guelph, ON N1G 5G3, Canada.
[Pound, Michael J.] USN, Facil Engn Command SW, San Diego, CA 92132 USA.
[Loeffler, Frank E.] Univ Tennessee, Dept Microbiol, Knoxville, TN 37996 USA.
[Loeffler, Frank E.] Univ Tennessee, Dept Civil & Environm Engn, Knoxville, TN 37996 USA.
[Loeffler, Frank E.] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA.
RP Capiro, NL (reprint author), Tufts Univ, Dept Civil & Environm Engn, 200 Coll Ave, Medford, MA 02155 USA.
EM natalie.capiro@tufts.edu; kurt.pennell@tufts.edu
RI Capiro, Natalie/G-5955-2010; Pennell, Kurt/F-6862-2010; Loeffler,
Frank/M-8216-2013
OI Pennell, Kurt/0000-0002-5788-6397;
FU Sealaska Environmental Services, LLC; Naval Facilities Engineering
Command Southwest [CTO-0015]; Environmental Security Technology
Certification Program [ER-0716]
FX The authors thank Gretell Otano and Namory Keita for their assistance
with the experimental sampling and Jed Costanza for his technical
assistance in developing analytical procedures. Funding for this
research was provided by a subcontract through Sealaska Environmental
Services, LLC, Naval Facilities Engineering Command Southwest CTO-0015,
and efforts were performed in support of the Environmental Security
Technology Certification Program Project ER-0716: "Improving
Effectiveness of Bioremediation at DNAPL Source Zone Sites by Applying
Partitioning Electron Donors (PEDs)".
NR 42
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U1 1
U2 15
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0013-936X
J9 ENVIRON SCI TECHNOL
JI Environ. Sci. Technol.
PD FEB 15
PY 2011
VL 45
IS 4
BP 1547
EP 1554
DI 10.1021/es102249x
PG 8
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 718LI
UT WOS:000287122400056
PM 21207963
ER
PT J
AU Klein, LW
Miller, DL
Goldstein, J
Haines, D
Balter, S
Fairobent, L
Norbash, A
AF Klein, Lloyd W.
Miller, Donald L.
Goldstein, James
Haines, David
Balter, Stephen
Fairobent, Lynne
Norbash, Alexander
CA Multispecialty Occupational Hlth
TI The Catheterization Laboratory and Interventional Vascular Suite of the
Future: Anticipating Innovations in Design and Function
SO CATHETERIZATION AND CARDIOVASCULAR INTERVENTIONS
LA English
DT Article
DE imaging; integration; robotics; occupational health; cath lab design
ID OCCUPATIONAL-HEALTH HAZARDS; ATHEROSCLEROTIC PLAQUE; SYSTEM; PATIENT;
MRI
C1 [Klein, Lloyd W.] Rush Med Coll, Dept Med, Chicago, IL 60612 USA.
[Miller, Donald L.] Uniformed Serv Univ Hlth Sci, F Edward Hebert Sch Med, Bethesda, MD 20814 USA.
[Miller, Donald L.] USN, Med Ctr, Dept Radiol, Bethesda, MD 20814 USA.
[Goldstein, James; Haines, David] Beaumont Hosp, Dept Med, Royal Oak, MI USA.
[Balter, Stephen] Columbia Univ, Dept Med, Med Ctr, New York, NY USA.
[Fairobent, Lynne] Amer Assoc Physicists Med, College Pk, MD USA.
[Norbash, Alexander] Boston Univ, Sch Med, Dept Radiol, Boston, MA 02118 USA.
RP Klein, LW (reprint author), Rush Med Coll, Dept Med, Chicago, IL 60612 USA.
EM lloydklein@comcast.net
OI Norbash, Alexander/0000-0003-2986-2563
NR 29
TC 10
Z9 10
U1 0
U2 1
PU WILEY-LISS
PI HOBOKEN
PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 1522-1946
J9 CATHETER CARDIO INTE
JI Catheter. Cardiovasc. Interv.
PD FEB 15
PY 2011
VL 77
IS 3
BP 447
EP 455
DI 10.1002/ccd.22872
PG 9
WC Cardiac & Cardiovascular Systems
SC Cardiovascular System & Cardiology
GA 725QD
UT WOS:000287659800022
PM 21328687
ER
PT J
AU Zamudio, L
Metzger, EJ
Hogan, P
AF Zamudio, Luis
Metzger, E. Joseph
Hogan, Patrick
TI Modeling the seasonal and interannual variability of the northern Gulf
of California salinity
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID 1997-1998 EL-NINO; WATER MASS FORMATION; COLORADO RIVER; PACIFIC;
CIRCULATION; HYDROGRAPHY; WINTER; TEMPERATURE; EXCHANGE; MEXICO
AB The 7 years (2003-2009) of output from a regional version of the Hybrid Coordinate Ocean Model (HYCOM) nested in global HYCOM are used to study the seasonal and interannual variability of the salinity in the northern Gulf of California (NGOC). Previous studies illustrate that the NGOC is characterized by an annual evaporation of similar to 0.9 m/yr. This evaporation generates high-sea-surface-salinity (SSS) water, which reaches a maxima in the NGOC (>37) and decreases to similar to 35 toward the entrance of the Gulf of California. The NGOC surface water is interannually modulated by fluctuations in evaporation and by fluctuations in the low-salinity water transported into the region by poleward eastern boundary currents. The fluctuations in the transport of low-salinity water are linked to the arrival of equatorially originated coastally trapped waves. The crucial role of the transport of low-salinity water for the interannual variability of SSS is illustrated by the 2006 and 2008 fall seasons, which include the lowest simulated salinity of the period 2003-2009. The lowest salinity in 2006 and 2008 cannot be explained solely by evaporation because 2006 was characterized by the largest evaporation of the period 2003-2009. However, the presence of the lowest-salinity environment can be attributed to the evaporation in conjunction with the largest upper ocean transport of low-salinity water carried to the NGOC by the 2006 and 2008 coastally trapped waves intensified poleward eastern boundary currents.
C1 [Zamudio, Luis] Florida State Univ, Ctr Ocean Atmospher Predict Studies, Tallahassee, FL 32306 USA.
[Metzger, E. Joseph; Hogan, Patrick] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Zamudio, L (reprint author), Florida State Univ, Ctr Ocean Atmospher Predict Studies, Tallahassee, FL 32306 USA.
EM luis.zamudio.ctr.mx@nrlssc.navy.mil
FU Office of Naval Research
FX This is a contribution to the projects Eddy Resolving Global Ocean
Prediction Including Tides and Full Column Mixing for Numerical Ocean
Models, both funded by the Office of Naval Research. The numerical
simulations were performed as part of the Eddy Resolving Global Ocean
Prediction Including Tides project using challenge and nonchallenge
grants of computer time from the Department of Defense High Performance
Computing Modernization Office on the Cray XT5 computer at the Navy DOD
Supercomputing Resource Center, Stennis Space Center. Thanks are
extended to Alan Wallcraft (NRL) for his contribution in the development
of HYCOM, Sergio Derada (NRL) who kindly provided the computer code used
to extract the model points along the coast, Adriana Mateos and Jorge
Zavala (UNAM) who kindly provided the computer code used to plot curly
vectors, and two anonymous reviewers for their constructive comments and
suggestions. This paper is the Naval Research Laboratory contribution
number NRL/JA/7320-08-9049.
NR 45
TC 6
Z9 6
U1 0
U2 11
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD FEB 15
PY 2011
VL 116
AR C02017
DI 10.1029/2010JC006631
PG 12
WC Oceanography
SC Oceanography
GA 723QB
UT WOS:000287520800003
ER
PT J
AU Blum, AS
Soto, CM
Sapsford, KE
Wilson, CD
Moore, MH
Ratna, BR
AF Blum, Amy Szuchmacher
Soto, Carissa M.
Sapsford, Kim E.
Wilson, Charmaine D.
Moore, Martin H.
Ratna, Banahalli R.
TI Molecular electronics based nanosensors on a viral scaffold
SO BIOSENSORS & BIOELECTRONICS
LA English
DT Article
DE Molecular electronics; Self-assembly; Avidin-biotin; Electronic sensing;
Nanoparticles
ID COWPEA MOSAIC-VIRUS; CHARGE-TRANSPORT; BUILDING-BLOCKS; NANOSCALE;
WIRES; NANOPARTICLES; DEVICES; COMPLEX; SENSORS
AB Assembling and interconnecting the building blocks of nanoscale devices and being able to electronically address or measure responses at the molecular level remains an important challenge for nanotechnology. Here we show the usefulness of bottom-up self-assembly for building electronic nanosensors from multiple components that have been designed to interact in a controlled manner. Cowpea mosaic virus was used as a scaffold to control the positions of gold nanoparticles. The nanoparticles were then interconnected using thiol-terminated conjugated organic molecules, resulting in a three-dimensional conductive network. Biotin molecules were attached to the virus scaffold using linkers to act as molecular receptors. We demonstrated that binding avidin to the biotin receptors on the self-assembled nanosensors causes a significant change in the network conductance that is dependent on the charge of the avidin protein. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Blum, Amy Szuchmacher] McGill Univ, Dept Chem, Montreal, PQ H3A 2K6, Canada.
[Blum, Amy Szuchmacher; Soto, Carissa M.; Moore, Martin H.; Ratna, Banahalli R.] USN, Res Lab, Washington, DC 20375 USA.
[Sapsford, Kim E.] George Mason Univ, Manassas, VA 20110 USA.
[Wilson, Charmaine D.] GEO Ctr Newton, Newton, MA USA.
RP Blum, AS (reprint author), McGill Univ, Dept Chem, 801 Sherbrooke St W, Montreal, PQ H3A 2K6, Canada.
EM amy.blum@mcgill.ca
FU DARPA; Office of Naval Research, NRL
FX This work was supported by funding from DARPA and the Office of Naval
Research, NRL Early New Start Program. We thank Dr. Anju Chatterji and
Professor John E. Johnson for providing cowpea mosaic virus samples, as
well as Dr. Brad Boos and Dr. Robert Bass for providing the proximal
probe electrode chips.
NR 30
TC 15
Z9 16
U1 1
U2 25
PU ELSEVIER ADVANCED TECHNOLOGY
PI OXFORD
PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON,
OXFORD OX5 1GB, OXON, ENGLAND
SN 0956-5663
J9 BIOSENS BIOELECTRON
JI Biosens. Bioelectron.
PD FEB 15
PY 2011
VL 26
IS 6
BP 2852
EP 2857
DI 10.1016/j.bios.2010.11.021
PG 6
WC Biophysics; Biotechnology & Applied Microbiology; Chemistry, Analytical;
Electrochemistry; Nanoscience & Nanotechnology
SC Biophysics; Biotechnology & Applied Microbiology; Chemistry;
Electrochemistry; Science & Technology - Other Topics
GA 720JT
UT WOS:000287277700007
PM 21185715
ER
PT J
AU Sanghera, J
Frantz, J
Kim, W
Villalobos, G
Baker, C
Shaw, B
Sadowski, B
Hunt, M
Miklos, F
Lutz, A
Aggarwal, I
AF Sanghera, Jas
Frantz, J.
Kim, Woohong
Villalobos, Guillermo
Baker, Colin
Shaw, Brandon
Sadowski, Bryan
Hunt, Michael
Miklos, Fritz
Lutz, Austin
Aggarwal, Ishwar
TI 10% Yb3+-Lu2O3 ceramic laser with 74% efficiency
SO OPTICS LETTERS
LA English
DT Article
ID SOLID-STATE LASERS; CRYSTALS; YB-LU2O3; LU2O3
AB We demonstrate laser oscillation at 1080 nm with more than 16 W of output power and with an optical-to-optical slope efficiency of up to 74% using a 10% Yb3+ doped Lu2O3 ceramic made by hot pressing. This represents the highest output power and efficiency obtained for a Yb3+ doped Lu2O3 ceramic and demonstrates the feasibility for power scaling. (C) 2011 Optical Society of America
C1 [Sanghera, Jas; Frantz, J.; Kim, Woohong; Villalobos, Guillermo; Baker, Colin; Shaw, Brandon; Lutz, Austin; Aggarwal, Ishwar] USN, Res Lab, Washington, DC 20375 USA.
[Sadowski, Bryan; Miklos, Fritz] GTEC Inc, Crofton, MD 21114 USA.
[Hunt, Michael] Inst Univ Res Fdn, Greenbelt, MD 20770 USA.
RP Sanghera, J (reprint author), USN, Res Lab, Code 5620,4555 Overlook Ave, Washington, DC 20375 USA.
EM sanghera@nrl.navy.mil
RI Baker, Colin/I-6657-2015
FU Joint Technology Office for High Energy Lasers (JTO-HEL); Office of
Naval Research (ONR)
FX The authors would like to acknowledge the financial support provided by
the Joint Technology Office for High Energy Lasers (JTO-HEL) and the
Office of Naval Research (ONR).
NR 15
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U1 0
U2 22
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD FEB 15
PY 2011
VL 36
IS 4
BP 576
EP 578
DI 10.1364/OL.36.000576
PG 3
WC Optics
SC Optics
GA 721YX
UT WOS:000287395500050
PM 21326461
ER
PT J
AU Spruce, JP
Sader, S
Ryan, RE
Smoot, J
Kuper, P
Ross, K
Prados, D
Russell, J
Gasser, G
McKellip, R
Hargrove, W
AF Spruce, Joseph P.
Sader, Steven
Ryan, Robert E.
Smoot, James
Kuper, Philip
Ross, Kenton
Prados, Donald
Russell, Jeffrey
Gasser, Gerald
McKellip, Rodney
Hargrove, William
TI Assessment of MODIS NDVI time series data products for detecting forest
defoliation by gypsy moth outbreaks
SO REMOTE SENSING OF ENVIRONMENT
LA English
DT Article
DE MODIS NDVI time series data; Gypsy moth; Regional forest defoliation
detection products; Defoliation classification accuracy; National forest
threat early warning system; Temporal data processing
ID EASTERN-UNITED-STATES; REMOTELY-SENSED DATA; COVER CHANGE; COLOR
COMPOSITES; DISTURBANCES; IMAGERY; WETNESS
AB This paper discusses an assessment of Moderate Resolution Imaging Spectroradiometer (MODIS) time-series data products for detecting forest defoliation from European gypsy moth (Lymantria dispar). This paper describes an effort to aid the United States Department of Agriculture (USDA) Forest Service in developing and assessing MODIS-based gypsy moth defoliation detection products and methods that could be applied in near real time without intensive field survey data collection as a precursor. In our study, MODIS data for 2000-2006 were processed for the mid-Appalachian highland region of the United States. Gypsy moth defoliation maps showing defoliated forests versus non-defoliated areas were produced from temporally filtered and composited MOD02 and MOD13 data using unsupervised classification and image thresholding of maximum value normalized difference vegetation index (NDVI) datasets computed for the defoliation period (June 10-July 27) of 2001 and of the entire time series. These products were validated by comparing stratified random sample locations to relevant Landsat and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) reference data sets. Composites of 250 m daily MOD02 outperformed 16-day MOD13 data in terms of classifying forest defoliation, showing a lower omission error rate (0.09 versus 0.56), a similar Kappa (0.67 versus 0.79), a comparable commission error rate (0.22 versus 0.14), and higher overall classification agreement (88 versus 79%). Results suggest that temporally processed MODIS time-series data can detect with good agreement to available reference data the extent and location of historical regional gypsy moth defoliation patches of 0.25 km(2) or more for 250-meter products. The temporal processing techniques used in this study enabled effective broad regional, "wall to wall" gypsy moth defoliation detection products for a 6.2 million ha region that were not produced previously with either MODIS or other satellite data. This study provides new, previously unavailable information on the relative agreement of temporally processed, gypsy moth defoliation detection products from MODIS NDVI time series data with respect to higher spatial resolution Landsat and ASTER data. These results also provided needed timely information on the potential of MODIS data for contributing near real time defoliation products to a USDA Forest Service Forest Threat Early Warning System. (C) 2010 Elsevier Inc. All rights reserved.
C1 [Spruce, Joseph P.; Smoot, James; Kuper, Philip; Russell, Jeffrey] Comp Sci Corp, John C Stennis Space Ctr, Stennis Space Ctr, MS USA.
[Spruce, Joseph P.; Ryan, Robert E.; Smoot, James; Kuper, Philip; Prados, Donald] Sci Syst & Applicat Inc, John C Stennis Space Ctr, Stennis Space Ctr, MS USA.
[Sader, Steven] Univ Maine, Orono, ME USA.
[Ryan, Robert E.] Innovat Imaging & Res, John C Stennis Space Ctr, Stennis Space Ctr, MS USA.
[Ross, Kenton] Sci Syst & Applicat Inc, Lanham, MD USA.
[Russell, Jeffrey] USN, Res Lab, John C Stennis Space Ctr, Stennis Space Ctr, MS USA.
[Gasser, Gerald] John C Stennis Space Ctr, Lockheed Martin Mission Serv, Civil Programs, Stennis Space Ctr, MS USA.
[McKellip, Rodney] NASA, John C Stennis Space Ctr, Stennis Space Ctr, MS USA.
[Hargrove, William] US Forest Serv, Eastern Forest Environm Threat Assessment Ctr, Asheville, NC USA.
RP Spruce, JP (reprint author), Comp Sci Corp, John C Stennis Space Ctr, Stennis Space Ctr, MS USA.
EM joseph.p.spruce@nasa.gov
OI Ross, Kenton/0000-0002-6381-5894
FU NASA at the John C. Stennis Space Center, Mississippi [NNS04AB54T]
FX Participation in this research by Science Systems and Applications, Inc.
and Computer Sciences Corporation was supported by NASA at the John C.
Stennis Space Center, Mississippi, under Task Order NNS04AB54T. We thank
Slawomir Blonski and two anonymous reviewers for providing constructive
comments on the manuscript.
NR 53
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Z9 47
U1 6
U2 37
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0034-4257
J9 REMOTE SENS ENVIRON
JI Remote Sens. Environ.
PD FEB 15
PY 2011
VL 115
IS 2
BP 427
EP 437
DI 10.1016/j.rse.2010.09.013
PG 11
WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic
Technology
SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science &
Photographic Technology
GA 714BS
UT WOS:000286782500015
ER
PT J
AU Gutfleisch, O
Willard, MA
Bruck, E
Chen, CH
Sankar, SG
Liu, JP
AF Gutfleisch, Oliver
Willard, Matthew A.
Bruck, Ekkes
Chen, Christina H.
Sankar, S. G.
Liu, J. Ping
TI Magnetic Materials and Devices for the 21st Century: Stronger, Lighter,
and More Energy Efficient
SO ADVANCED MATERIALS
LA English
DT Review
ID ROOM-TEMPERATURE APPLICATIONS; B PERMANENT-MAGNETS; ENTROPY CHANGE;
MAGNETOCALORIC PROPERTIES; INTERMETALLIC COMPOUND; PROCESSING ROUTES;
ELECTRIC-POWER; REFRIGERATION; ALLOYS; PERFORMANCE
AB A new energy paradigm, consisting of greater reliance on renewable energy sources and increased concern for energy efficiency in the total energy life-cycle, has accelerated research into energy-related technologies. Due to their ubiquity, magnetic materials play an important role in improving the efficiency and performance of devices in electric power generation, conditioning, conversion, transportation, and other energy-use sectors of the economy. This review focuses on the state-of-the-art hard and soft magnets and magnetocaloric materials, with an emphasis on their optimization for energy applications. Specifically, the impact of hard magnets on electric motor and transportation technologies, of soft magnetic materials on electricity generation and conversion technologies, and of magnetocaloric materials for refrigeration technologies, are discussed. The synthesis, characterization, and property evaluation of the materials, with an emphasis on structure-property relationships, are discussed in the context of their respective markets, as well as their potential impact on energy efficiency. Finally, considering future bottlenecks in raw materials, options for the recycling of rare-earth intermetallics for hard magnets will be discussed.
C1 [Gutfleisch, Oliver] IFW Dresden, Inst Metall Mat, D-01069 Dresden, Germany.
[Willard, Matthew A.] USN, Res Lab, Washington, DC 20375 USA.
[Bruck, Ekkes] Delft Univ Technol, Fac Sci Appl, NL-2629 JB Delft, Netherlands.
[Chen, Christina H.] Univ Dayton, Magnet Lab, Dayton, OH 45469 USA.
[Sankar, S. G.] Adv Mat Corp, Pittsburgh, PA 15220 USA.
[Liu, J. Ping] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA.
RP Gutfleisch, O (reprint author), IFW Dresden, Inst Metall Mat, D-01069 Dresden, Germany.
EM o.gutfleisch@ifw-dresden.de
RI Gutfleisch, Oliver/C-7241-2011; Willard, Matthew/A-8492-2009; Bruck,
Ekkes/E-3365-2014;
OI Gutfleisch, Oliver/0000-0001-8021-3839; Willard,
Matthew/0000-0001-5052-8012; Bruck, Ekkes/0000-0002-5063-3338
FU DFG; BMBF; EU; NRL; ONR; DARPA; STW; FOM; NWO; US Air Force; ARO; NASA;
NSF; US DOE; Naval Air Systems Command, Lakehurst, NJ; Pennsylvania's
DEP; US/DoD/DARPA; University of Texas
FX O.G. thanks the DFG, BMBF, EU, and various industrial partners for their
financial support in the past twelve years to his research effort in
advanced functional magnetic materials. M. A. W. thanks NRL, ONR, and
DARPA for financial support to his research effort in magnetic
materials. E. B. thanks the STW, FOM, and NWO for financial support. CHC
thanks the US Air Force, ARO, DARPA, NASA, and NSF for their support in
the past decade to her research effort in magnetic materials and
computer simulations. S. G. S. acknowledges several grants and contracts
from the US DOE, DARPA, ARO, Naval Air Systems Command, Lakehurst, NJ,
and Pennsylvania's DEP. J.P.L. thanks the US/DoD/DARPA, ARO, ONR, NSF,
and the University of Texas for their financial support in the past ten
years to his research efforts in nanocomposite magnetic materials.
NR 127
TC 539
Z9 553
U1 65
U2 545
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0935-9648
J9 ADV MATER
JI Adv. Mater.
PD FEB 15
PY 2011
VL 23
IS 7
BP 821
EP 842
DI 10.1002/adma.201002180
PG 22
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 725TH
UT WOS:000287668500003
PM 21294168
ER
PT J
AU Saenz, JW
Sams, RW
Jamieson, B
AF Saenz, John Woodrow
Sams, Richard W., II
Jamieson, Barbara
TI Treatment of Hyperhidrosis
SO AMERICAN FAMILY PHYSICIAN
LA English
DT Editorial Material
ID TOXIN TYPE-A; PRIMARY AXILLARY HYPERHIDROSIS; DOUBLE-BLIND TRIAL; PALMAR
HYPERHIDROSIS; FOCAL HYPERHIDROSIS; BOTULINUM; EFFICACY; SAFETY
C1 [Saenz, John Woodrow; Sams, Richard W., II] USN, Hosp Jacksonville Family Med Residency Program, Jacksonville, FL USA.
[Jamieson, Barbara] Med Coll Wisconsin, Milwaukee, WI 53226 USA.
RP Saenz, JW (reprint author), USN, Hosp Jacksonville Family Med Residency Program, Jacksonville, FL USA.
EM John.Saenz@med.navy.mil
NR 11
TC 0
Z9 0
U1 0
U2 2
PU AMER ACAD FAMILY PHYSICIANS
PI KANSAS CITY
PA 8880 WARD PARKWAY, KANSAS CITY, MO 64114-2797 USA
SN 0002-838X
J9 AM FAM PHYSICIAN
JI Am. Fam. Physician
PD FEB 15
PY 2011
VL 83
IS 4
BP 464
EP +
PG 2
WC Primary Health Care; Medicine, General & Internal
SC General & Internal Medicine
GA 979ZE
UT WOS:000306862600017
ER
PT J
AU Crum-Cianflone, N
Stepenosky, J
Medina, S
Wessman, D
Krause, D
Boswell, G
AF Crum-Cianflone, Nancy
Stepenosky, James
Medina, Sheila
Wessman, Dylan
Krause, David
Boswell, Gilbert
TI Clinically Significant Incidental Findings Among Human Immunodeficiency
Virus-Infected Men During Computed Tomography for Determination of
Coronary Artery Calcium
SO AMERICAN JOURNAL OF CARDIOLOGY
LA English
DT Article
ID RECEIVING ANTIRETROVIRAL THERAPY; SIGNIFICANT NONCARDIAC FINDINGS;
INTIMA-MEDIA THICKNESS; EXTRACARDIAC FINDINGS; PULMONARY NODULES; HIV;
PREVALENCE; GYNECOMASTIA; ANGIOGRAPHY; DISEASE
AB Those infected with the human immunodeficiency virus (HIV) have a greater risk of cardiovascular disease and might undergo computed tomographic (CT) scans for early, detection. Incidental findings on cardiac CT imaging are important components of the benefits and costs of testing. We determined the prevalence and factors associated with incidental findings on CT scans performed to screen for coronary artery calcium (CAC) among HIV-infected men. A clinically significant finding was defined as requiring additional workup or a medical referral. A total of 215 HIV-infected men were evaluated. Their median age was 43 years; 17% were current tobacco users; the median CD4 count was 580 cells/mm(3); and 83% were receiving antiretroviral medications. Also, 34% had a positive CAC score of > 0. An incidental finding was noted among 93 participants (43%), with 36 (17%) having >= 1 clinically significant finding. A total of 139 findings were noted, most commonly pulmonary nodules, followed by granulomas, scarring, and hilar adenopathy. Most of the incidental findings were stable on follow-up, and no malignancies were detected. The factors associated with the presence of an incidental finding in the multi-variate model included increasing age (odds ratio 1.6 per 10 years, p < 0.01), positive CAC score (odds ratio 2.3, p < 0.01), and current tobacco use (odds ratio 2.5, p = 0.02). In conclusion, incidental findings were common among HIV-infected men undergoing screening CT imaging for CAC determination. The incidental findings were more common among older patients and those with detectable CAC. (C) 2011 Elsevier Inc. All rights reserved. (Am J Cardiol 2011;107:633-637)
C1 [Crum-Cianflone, Nancy; Medina, Sheila] Uniformed Serv Univ Hlth Sci, Infect Dis Clin Res Program, Bethesda, MD 20814 USA.
[Crum-Cianflone, Nancy; Medina, Sheila] USN, San Diego Med Ctr, Div Infect Dis, San Diego, CA 92152 USA.
[Stepenosky, James; Boswell, Gilbert] USN, San Diego Med Ctr, Dept Radiol, San Diego, CA 92152 USA.
[Wessman, Dylan; Krause, David] USN, San Diego Med Ctr, Dept Cardiol, San Diego, CA 92152 USA.
RP Crum-Cianflone, N (reprint author), Uniformed Serv Univ Hlth Sci, Infect Dis Clin Res Program, Bethesda, MD 20814 USA.
EM nancy.crum@med.navy.mil
FU Department of Defense through the Uniformed Services University of the
Health Sciences; National Institute of Allergy and Infectious Diseases,
National Institutes of Health, Bethesda, Maryland [YI-AI-5072]
FX Support for this study (Infectious Disease Clinical Research
Program-018) was provided by the Infectious Disease Clinical Research
Program, a Department of Defense program executed through the Uniformed
Services University of the Health Sciences. This project was funded in
whole, or in part, with federal funds from the National Institute of
Allergy and Infectious Diseases, National Institutes of Health,
Bethesda, Maryland, under Inter-Agency Agreement YI-AI-5072.
NR 26
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PU EXCERPTA MEDICA INC-ELSEVIER SCIENCE INC
PI BRIDGEWATER
PA 685 ROUTE 202-206 STE 3, BRIDGEWATER, NJ 08807 USA
SN 0002-9149
J9 AM J CARDIOL
JI Am. J. Cardiol.
PD FEB 15
PY 2011
VL 107
IS 4
BP 633
EP 637
DI 10.1016/j.amjcard.2010.10.026
PG 5
WC Cardiac & Cardiovascular Systems
SC Cardiovascular System & Cardiology
GA 728RL
UT WOS:000287892100025
PM 21195379
ER
PT J
AU Friedman, AL
Chun, H
Heiman, D
Jung, YJ
Menon, L
AF Friedman, Adam L.
Chun, Hyunkyung
Heiman, Don
Jung, Yung Joon
Menon, Latika
TI Investigation of electrical transport in hydrogenated multiwalled carbon
nanotubes
SO PHYSICA B-CONDENSED MATTER
LA English
DT Article
DE Carbon nanotubes; Electrical transport; Ferromagnetism; Carbon
ID COULOMB BLOCKADE
AB Highly disordered multiwalled carbon nanotubes of large outer diameter (similar to 60 nm) fabricated by means of chemical vapor deposition process inside porous alumina templates exhibit ferromagnetism when annealed in a H-2/Ar atmosphere. In the presence of an applied magnetic field, there is a transition from positive to negative magnetoresistance. The transition may be explained in terms of the Bright model for ordered and disordered carbon structures. Additionally, temperature dependent electrical transport experiments exhibit a zero-bias anomaly at low temperature. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Friedman, Adam L.] USN, Res Lab, Washington, DC 20375 USA.
[Friedman, Adam L.; Heiman, Don; Menon, Latika] Northeastern Univ, Dept Phys, Boston, MA 02115 USA.
[Chun, Hyunkyung; Jung, Yung Joon] Northeastern Univ, Dept Mech & Ind Engn, Boston, MA 02115 USA.
RP Friedman, AL (reprint author), USN, Res Lab, Code 6876,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM adam.friedman.ctr@nrl.navy.mil
RI Friedman, Adam/D-9610-2011; Jung, Yung Joon/L-2032-2013
OI Friedman, Adam/0000-0003-0597-5432;
FU NSF [ECCS-0551468]
FX The authors acknowledge support from NSF CAREER Grant ECCS-0551468.
NR 21
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U1 2
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4526
J9 PHYSICA B
JI Physica B
PD FEB 15
PY 2011
VL 406
IS 4
BP 841
EP 845
DI 10.1016/j.physb.2010.12.009
PG 5
WC Physics, Condensed Matter
SC Physics
GA 726JO
UT WOS:000287717100023
ER
PT J
AU Sprangle, P
Penano, J
Hafizi, B
Gordon, D
Gold, S
Ting, A
Mitchell, C
AF Sprangle, Phillip
Penano, Joseph
Hafizi, Bahman
Gordon, Daniel
Gold, Steven
Ting, Antonio
Mitchell, Chad
TI High average current electron guns for high-power free electron lasers
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID ENERGY RECOVERY LINACS; INJECTOR DESIGNS; EMISSION; BEAMS
AB High average power free-electron lasers (FELs) require high average current electron injectors capable of generating high quality, short duration electron bunches with a repetition rate equal to the frequency of the rf linac. In this paper we propose, analyze, and simulate an rf-gated, gridded thermionic electron gun for use in high average power FELs. Thermionic cathodes can provide the necessary high current, have long lifetimes, and require modest vacuums. In the proposed configuration the rf-gated grid is modulated at the fundamental and 3rd harmonic of the linac frequency. The addition of the 3rd harmonic on the grid results in shorter electron bunches. In this configuration, every rf bucket of the linac accelerating field contains an electron bunch. Particle-in-cell simulations indicate that this approach can provide the necessary charge per bunch, bunch duration, longitudinal and transverse emittance, and repetition rate for high average power FELs operating in the IR regime.
C1 [Sprangle, Phillip; Penano, Joseph; Hafizi, Bahman; Gordon, Daniel; Gold, Steven; Ting, Antonio; Mitchell, Chad] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Sprangle, P (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
FU Office of Naval Research; National Research Council
FX The authors are grateful to Professor P. Serafim for useful discussions.
This work was supported by the Office of Naval Research. C. Mitchell is
supported by a National Research Council postdoctoral fellowship.
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U1 0
U2 15
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD FEB 14
PY 2011
VL 14
IS 2
AR 020702
DI 10.1103/PhysRevSTAB.14.020702
PG 15
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 721RB
UT WOS:000287371300001
ER
PT J
AU Cramer, JA
Begue, NJ
Morris, RE
AF Cramer, Jeffrey A.
Begue, Nathan J.
Morris, Robert E.
TI Improved peak selection strategy for automatically determining minute
compositional changes in fuels by gas chromatography-mass spectrometry
SO JOURNAL OF CHROMATOGRAPHY A
LA English
DT Article
DE Gas chromatography-mass spectrometry (GC-MS, GCMS); Parallel factor
analysis (PARAFAC); Analysis of variance (ANOVA); Peak selection;
Microbiological contamination (MBC); Diesel fuel
ID PARALLEL FACTOR-ANALYSIS; LIQUID-CHROMATOGRAPHY; GC-MS; RESOLUTION;
PARAFAC; QUANTIFICATION; IDENTIFICATION
AB During the development of automated computational methods to detect minute compositional changes in fuels, it became apparent that peak selection through the spectral deconvolution of gas chromatography-mass spectrometry (GC-MS) data is limited by the complexity and noise levels inherent in the data. Specifically, current techniques are not capable of detecting minute, chemically relevant compositional differences with sufficient sensitivity. Therefore, an alternative peak selection strategy was developed based on spectral interpretation through interval-oriented parallel factor analysis (PARAFAC). It will be shown that this strategy outperforms the deconvolution-based peak selection strategy as well as two control strategies. Successful application of the PARAFAC-based method to detect minute chemical changes produced during microbiological growth in four different inoculated diesel fuels will be discussed. Published by Elsevier B.V.
C1 [Cramer, Jeffrey A.; Begue, Nathan J.; Morris, Robert E.] USN, Res Lab, Chem Sensing & Fuel Technol Sect, Washington, DC 20375 USA.
RP Cramer, JA (reprint author), USN, Res Lab, Chem Sensing & Fuel Technol Sect, Code 6181,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM jeffrey.cramer@nrl.navy.mil
FU Office of Naval Research
FX We thank the Office of Naval Research for their funding and support.
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PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0021-9673
J9 J CHROMATOGR A
JI J. Chromatogr. A
PD FEB 11
PY 2011
VL 1218
IS 6
BP 824
EP 832
DI 10.1016/j.chroma.2010.12.037
PG 9
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 719BV
UT WOS:000287175300009
PM 21211800
ER
PT J
AU Lyapustin, A
Wang, Y
Laszlo, I
Kahn, R
Korkin, S
Remer, L
Levy, R
Reid, JS
AF Lyapustin, A.
Wang, Y.
Laszlo, I.
Kahn, R.
Korkin, S.
Remer, L.
Levy, R.
Reid, J. S.
TI Multiangle implementation of atmospheric correction (MAIAC): 2. Aerosol
algorithm
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID RESOLUTION IMAGING SPECTRORADIOMETER; OPTICAL DEPTH; RETRIEVAL; MODIS;
LAND; VALIDATION; AERONET; PRODUCTS; NETWORK
AB An aerosol component of a new multiangle implementation of atmospheric correction (MAIAC) algorithm is presented. MAIAC is a generic algorithm developed for the Moderate Resolution Imaging Spectroradiometer (MODIS), which performs aerosol retrievals and atmospheric correction over both dark vegetated surfaces and bright deserts based on a time series analysis and image-based processing. The MAIAC look-up tables explicitly include surface bidirectional reflectance. The aerosol algorithm derives the spectral regression coefficient (SRC) relating surface bidirectional reflectance in the blue (0.47 mu m) and shortwave infrared (2.1 mu m) bands; this quantity is prescribed in the MODIS operational Dark Target algorithm based on a parameterized formula. The MAIAC aerosol products include aerosol optical thickness and a fine-mode fraction at resolution of 1 km. This high resolution, required in many applications such as air quality, brings new information about aerosol sources and, potentially, their strength. AERONET validation shows that the MAIAC and MOD04 algorithms have similar accuracy over dark and vegetated surfaces and that MAIAC generally improves accuracy over brighter surfaces due to the SRC retrieval and explicit bidirectional reflectance factor characterization, as demonstrated for several U. S. West Coast AERONET sites. Due to its generic nature and developed angular correction, MAIAC performs aerosol retrievals over bright deserts, as demonstrated for the Solar Village Aerosol Robotic Network (AERONET) site in Saudi Arabia.
C1 [Lyapustin, A.; Kahn, R.; Remer, L.] NASA, Atmospheres Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Laszlo, I.] NOAA, NESDIS, STAR, Camp Springs, MD 20746 USA.
[Levy, R.] Sci Syst & Applicat Inc, Lanham, MD 20706 USA.
[Reid, J. S.] USN, Aerosol & Radiat Sect, Marine Meteorol Div, Res Lab, Monterey, CA 93943 USA.
[Lyapustin, A.; Wang, Y.; Korkin, S.] Univ Maryland Baltimore Cty, Goddard Earth Sci & Technol Ctr, Baltimore, MD 21228 USA.
RP Lyapustin, A (reprint author), NASA, Atmospheres Lab, Goddard Space Flight Ctr, MC 614-4, Greenbelt, MD 20771 USA.
EM alexei.i.lyapustin@nasa.gov
RI Laszlo, Istvan/F-5603-2010; Levy, Robert/M-7764-2013; Reid,
Jeffrey/B-7633-2014; Lyapustin, Alexei/H-9924-2014; Kahn,
Ralph/D-5371-2012
OI Laszlo, Istvan/0000-0002-5747-9708; Levy, Robert/0000-0002-8933-5303;
Reid, Jeffrey/0000-0002-5147-7955; Lyapustin,
Alexei/0000-0003-1105-5739; Kahn, Ralph/0000-0002-5234-6359
FU NASA; NOAA GOES-R; EOS-MISR; Office of Naval Research [322]
FX The research of A. Lyapustin, Y. Wang, and S. Korkin was funded by the
NASA Terrestrial Ecology Program (D. Wickland) and NASA Applications
Program (L. Friedl and B. Doorn) and in part by the NOAA GOES-R program
(M. Goldberg). The work of R. Kahn is supported in part by NASA's
Climate and Radiation Research and Analysis Program, under H. Maring,
NASA's Atmospheric Composition Program, and the EOS-MISR Project. The
contribution of R. Levy and L. Remer to this work is supported by the
NASA Radiation Science Program (H. Maring). J. Reid's contribution was
supported by the Office of Naval Research Code 322. This work strongly
benefited from multiple discussions with our AERONET and NASA GSFC
colleagues (A. Marshak, B. Holben, A. Sinuyk, A. Smirnov, I. Slutsker,
and M. Sorokin). We are grateful to AERONET team for use of their data.
NR 36
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U1 3
U2 35
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
EI 2169-8996
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD FEB 11
PY 2011
VL 116
AR D03211
DI 10.1029/2010JD014986
PG 15
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 721AA
UT WOS:000287322600005
ER
PT J
AU Aggarwal, MM
Ahammed, Z
Alakhverdyants, AV
Alekseev, I
Alford, J
Anderson, BD
Anson, CD
Arkhipkin, D
Averichev, GS
Balewski, J
Beavis, DR
Bellwied, R
Betancourt, MJ
Betts, RR
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Biritz, B
Bland, LC
Borowski, W
Bouchet, J
Braidot, E
Brandin, AV
Bridgeman, A
Brovko, SG
Bruna, E
Bueltmann, S
Bunzarov, I
Burton, TP
Cai, XZ
Caines, H
Sanchez, MCD
Cebra, D
Cendejas, R
Cervantes, MC
Chajecki, Z
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Cheng, J
Cherney, M
Chikanian, A
Choi, KE
Christie, W
Chung, P
Codrington, MJM
Corliss, R
Cramer, JG
Crawford, HJ
Dash, S
Leyva, AD
De Silva, LC
Debbe, RR
Dedovich, TG
Derevschikov, AA
de Souza, RD
Didenko, L
Djawotho, P
Dogra, SM
Dong, X
Drachenberg, JL
Draper, JE
Dunlop, JC
Mazumdar, MRD
Efimov, LG
Elnimr, M
Engelage, J
Eppley, G
Erazmus, B
Estienne, M
Eun, L
Evdokimov, O
Fatemi, R
Fedorisin, J
Fersch, RG
Finch, E
Fine, V
Fisyak, Y
Gagliardi, CA
Gangadharan, DR
Ganti, MS
Geromitsos, A
Geurts, F
Ghosh, P
Gorbunov, YN
Gordon, A
Grebenyuk, O
Grosnick, D
Guertin, SM
Gupta, A
Guryn, W
Haag, B
Hamed, A
Han, LX
Harris, JW
Hays-Wehle, JP
Heinz, M
Heppelmann, S
Hirsch, A
Hjort, E
Hoffmann, GW
Hofman, DJ
Huang, B
Huang, HZ
Humanic, TJ
Huo, L
Igo, G
Jacobs, P
Jacobs, WW
Jena, C
Jin, F
Joseph, J
Judd, EG
Kabana, S
Kang, K
Kapitan, J
Kauder, K
Keane, D
Kechechyan, A
Kettler, D
Kikola, DP
Kiryluk, J
Kisiel, A
Kizka, V
Klein, SR
Knospe, AG
Kocoloski, A
Koetke, DD
Kollegger, T
Konzer, J
Koralt, I
Koroleva, L
Korsch, W
Kotchenda, L
Kouchpil, V
Kravtsov, P
Krueger, K
Krus, M
Kumar, L
Kurnadi, P
Lamont, MAC
Landgraf, JM
LaPointe, S
Lauret, J
Lebedev, A
Lednicky, R
Lee, CH
Lee, JH
Leight, W
LeVine, MJ
Li, C
Li, L
Li, N
Li, W
Li, X
Li, X
Li, Y
Li, ZM
Lisa, MA
Liu, F
Liu, H
Liu, J
Ljubicic, T
Llope, WJ
Longacre, RS
Love, WA
Lu, Y
Lukashov, EV
Luo, X
Ma, GL
Ma, YG
Mahapatra, DP
Majka, R
Mall, OI
Mangotra, LK
Manweiler, R
Margetis, S
Markert, C
Masui, H
Matis, HS
Matulenko, YA
McDonald, D
McShane, TS
Meschanin, A
Milner, R
Minaev, NG
Mioduszewski, S
Mischke, A
Mitrovski, MK
Mohanty, B
Mondal, MM
Morozov, B
Morozov, DA
Munhoz, MG
Naglis, M
Nandi, BK
Nayak, TK
Netrakanti, PK
Ng, MJ
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Ohlson, A
Okorokov, V
Oldag, EW
Olson, D
Pachr, M
Page, BS
Pal, SK
Pandit, Y
Panebratsev, Y
Pawlak, T
Peitzmann, T
Perkins, C
Peryt, W
Phatak, SC
Pile, P
Planinic, M
Ploskon, MA
Pluta, J
Plyku, D
Poljak, N
Poskanzer, AM
Potukuchi, BVKS
Powell, CB
Prindle, D
Pruneau, C
Pruthi, NK
Pujahari, PR
Putschke, J
Qiu, H
Raniwala, R
Raniwala, S
Ray, RL
Redwine, R
Reed, R
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Rose, A
Ruan, L
Sakai, S
Sakrejda, I
Sakuma, T
Salur, S
Sandweiss, J
Sangaline, E
Schambach, J
Scharenberg, RP
Schmah, AM
Schmitz, N
Schuster, TR
Seele, J
Seger, J
Selyuzhenkov, I
Seyboth, P
Shahaliev, E
Shao, M
Sharma, M
Shi, SS
Sichtermann, EP
Simon, F
Singaraju, RN
Skoby, MJ
Smirnov, N
Sorensen, P
Spinka, HM
Srivastava, B
Stanislaus, TDS
Staszak, D
Stevens, JR
Stock, R
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Subba, NL
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Svirida, DN
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarini, LH
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Timoshenko, S
Tlusty, D
Tokarev, M
Trainor, TA
Tram, VN
Trentalange, S
Tribble, RE
Tsai, OD
Ullrich, T
Underwood, DG
Van Buren, G
van Leeuwen, M
van Nieuwenhuizen, G
Vanfossen, JA
Varma, R
Vasconcelos, GMS
Vasiliev, AN
Videbk, F
Viyogi, YP
Vokal, S
Voloshin, SA
Wada, M
Walker, M
Wang, F
Wang, G
Wang, H
Wang, JS
Wang, Q
Wang, XL
Wang, Y
Webb, G
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wissink, SW
Witt, R
Wu, YF
Xie, W
Xu, H
Xu, N
Xu, QH
Xu, W
Xu, Y
Xu, Z
Xue, L
Yang, Y
Yepes, P
Yip, K
Yoo, IK
Yue, Q
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, JB
Zhang, S
Zhang, WM
Zhang, XP
Zhang, Y
Zhang, ZP
Zhao, J
Zhong, C
Zhou, W
Zhu, X
Zhu, YH
Zoulkarneev, R
Zoulkarneeva, Y
AF Aggarwal, M. M.
Ahammed, Z.
Alakhverdyants, A. V.
Alekseev, I.
Alford, J.
Anderson, B. D.
Anson, C. D.
Arkhipkin, D.
Averichev, G. S.
Balewski, J.
Beavis, D. R.
Bellwied, R.
Betancourt, M. J.
Betts, R. R.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Biritz, B.
Bland, L. C.
Borowski, W.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bridgeman, A.
Brovko, S. G.
Bruna, E.
Bueltmann, S.
Bunzarov, I.
Burton, T. P.
Cai, X. Z.
Caines, H.
de la Barca Sanchez, M. Calderon
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chajecki, Z.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Cheng, J.
Cherney, M.
Chikanian, A.
Choi, K. E.
Christie, W.
Chung, P.
Codrington, M. J. M.
Corliss, R.
Cramer, J. G.
Crawford, H. J.
Dash, S.
Leyva, A. Davila
De Silva, L. C.
Debbe, R. R.
Dedovich, T. G.
Derevschikov, A. A.
Derradi de Souza, R.
Didenko, L.
Djawotho, P.
Dogra, S. M.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Dunlop, J. C.
Mazumdar, M. R. Dutta
Efimov, L. G.
Elnimr, M.
Engelage, J.
Eppley, G.
Erazmus, B.
Estienne, M.
Eun, L.
Evdokimov, O.
Fatemi, R.
Fedorisin, J.
Fersch, R. G.
Finch, E.
Fine, V.
Fisyak, Y.
Gagliardi, C. A.
Gangadharan, D. R.
Ganti, M. S.
Geromitsos, A.
Geurts, F.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Grebenyuk, O.
Grosnick, D.
Guertin, S. M.
Gupta, A.
Guryn, W.
Haag, B.
Hamed, A.
Han, L-X.
Harris, J. W.
Hays-Wehle, J. P.
Heinz, M.
Heppelmann, S.
Hirsch, A.
Hjort, E.
Hoffmann, G. W.
Hofman, D. J.
Huang, B.
Huang, H. Z.
Humanic, T. J.
Huo, L.
Igo, G.
Jacobs, P.
Jacobs, W. W.
Jena, C.
Jin, F.
Joseph, J.
Judd, E. G.
Kabana, S.
Kang, K.
Kapitan, J.
Kauder, K.
Keane, D.
Kechechyan, A.
Kettler, D.
Kikola, D. P.
Kiryluk, J.
Kisiel, A.
Kizka, V.
Klein, S. R.
Knospe, A. G.
Kocoloski, A.
Koetke, D. D.
Kollegger, T.
Konzer, J.
Koralt, I.
Koroleva, L.
Korsch, W.
Kotchenda, L.
Kouchpil, V.
Kravtsov, P.
Krueger, K.
Krus, M.
Kumar, L.
Kurnadi, P.
Lamont, M. A. C.
Landgraf, J. M.
LaPointe, S.
Lauret, J.
Lebedev, A.
Lednicky, R.
Lee, C-H.
Lee, J. H.
Leight, W.
LeVine, M. J.
Li, C.
Li, L.
Li, N.
Li, W.
Li, X.
Li, X.
Li, Y.
Li, Z. M.
Lisa, M. A.
Liu, F.
Liu, H.
Liu, J.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Love, W. A.
Lu, Y.
Lukashov, E. V.
Luo, X.
Ma, G. L.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mall, O. I.
Mangotra, L. K.
Manweiler, R.
Margetis, S.
Markert, C.
Masui, H.
Matis, H. S.
Matulenko, Yu. A.
McDonald, D.
McShane, T. S.
Meschanin, A.
Milner, R.
Minaev, N. G.
Mioduszewski, S.
Mischke, A.
Mitrovski, M. K.
Mohanty, B.
Mondal, M. M.
Morozov, B.
Morozov, D. A.
Munhoz, M. G.
Naglis, M.
Nandi, B. K.
Nayak, T. K.
Netrakanti, P. K.
Ng, M. J.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Ohlson, A.
Okorokov, V.
Oldag, E. W.
Olson, D.
Pachr, M.
Page, B. S.
Pal, S. K.
Pandit, Y.
Panebratsev, Y.
Pawlak, T.
Peitzmann, T.
Perkins, C.
Peryt, W.
Phatak, S. C.
Pile, P.
Planinic, M.
Ploskon, M. A.
Pluta, J.
Plyku, D.
Poljak, N.
Poskanzer, A. M.
Potukuchi, B. V. K. S.
Powell, C. B.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Pujahari, P. R.
Putschke, J.
Qiu, H.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Redwine, R.
Reed, R.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Rose, A.
Ruan, L.
Sakai, S.
Sakrejda, I.
Sakuma, T.
Salur, S.
Sandweiss, J.
Sangaline, E.
Schambach, J.
Scharenberg, R. P.
Schmah, A. M.
Schmitz, N.
Schuster, T. R.
Seele, J.
Seger, J.
Selyuzhenkov, I.
Seyboth, P.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, S. S.
Sichtermann, E. P.
Simon, F.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Sorensen, P.
Spinka, H. M.
Srivastava, B.
Stanislaus, T. D. S.
Staszak, D.
Stevens, J. R.
Stock, R.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Subba, N. L.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Svirida, D. N.
Symons, T. J. M.
Szanto de Toledo, A.
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarini, L. H.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Timoshenko, S.
Tlusty, D.
Tokarev, M.
Trainor, T. A.
Tram, V. N.
Trentalange, S.
Tribble, R. E.
Tsai, O. D.
Ullrich, T.
Underwood, D. G.
Van Buren, G.
van Leeuwen, M.
van Nieuwenhuizen, G.
Vanfossen, J. A.
Varma, R., Jr.
Vasconcelos, G. M. S.
Vasiliev, A. N.
Videbk, F.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Walker, M.
Wang, F.
Wang, G.
Wang, H.
Wang, J. S.
Wang, Q.
Wang, X. L.
Wang, Y.
Webb, G.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Wu, Y. F.
Xie, W.
Xu, H.
Xu, N.
Xu, Q. H.
Xu, W.
Xu, Y.
Xu, Z.
Xue, L.
Yang, Y.
Yepes, P.
Yip, K.
Yoo, I-K.
Yue, Q.
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, J. B.
Zhang, S.
Zhang, W. M.
Zhang, X. P.
Zhang, Y.
Zhang, Z. P.
Zhao, J.
Zhong, C.
Zhou, W.
Zhu, X.
Zhu, Y. H.
Zoulkarneev, R.
Zoulkarneeva, Y.
CA STAR Collaboration
TI Measurement of the Parity-Violating Longitudinal Single-Spin Asymmetry
for W-+/- Boson Production in Polarized Proton-Proton Collisions at root
s=500 GeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ELECTROMAGNETIC CALORIMETER; DISTRIBUTIONS; PHYSICS
AB We report the first measurement of the parity-violating single-spin asymmetries for midrapidity decay positrons and electrons from W+ and W- boson production in longitudinally polarized proton-proton collisions at root s = 500 GeV by the STAR experiment at RHIC. The measured asymmetries, A(L)(W+) = -0.27 +/- 0.10(stat.) +/- 0.02(syst.) +/- 0.03(norm.) and A(L)(W-) = 0.14 +/- 0.19(stat.) +/- 0.02(syst.) +/- 0.01(norm.), are consistent with theory predictions, which are large and of opposite sign. These predictions are based on polarized quark and antiquark distribution functions constrained by polarized deep-inelastic scattering measurements.
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RP Aggarwal, MM (reprint author), Panjab Univ, Chandigarh 160014, India.
RI Mischke, Andre/D-3614-2011; Xu, Wenqin/H-7553-2014; Takahashi,
Jun/B-2946-2012; Planinic, Mirko/E-8085-2012; Peitzmann,
Thomas/K-2206-2012; Witt, Richard/H-3560-2012; Yip, Kin/D-6860-2013;
Xue, Liang/F-8077-2013; Voloshin, Sergei/I-4122-2013; Pandit,
Yadav/I-2170-2013; Lednicky, Richard/K-4164-2013; Yang,
Yanyun/B-9485-2014; Bielcikova, Jana/G-9342-2014; Alekseev,
Igor/J-8070-2014; Sumbera, Michal/O-7497-2014; Strikhanov,
Mikhail/P-7393-2014; Bruna, Elena/C-4939-2014; Dogra, Sunil
/B-5330-2013; Chaloupka, Petr/E-5965-2012; Huang, Bingchu/H-6343-2015;
Derradi de Souza, Rafael/M-4791-2013; Suaide, Alexandre/L-6239-2016;
Svirida, Dmitry/R-4909-2016; Inst. of Physics, Gleb
Wataghin/A-9780-2017; Okorokov, Vitaly/C-4800-2017; Ma,
Yu-Gang/M-8122-2013;
OI Xu, Wenqin/0000-0002-5976-4991; Takahashi, Jun/0000-0002-4091-1779;
Peitzmann, Thomas/0000-0002-7116-899X; Yip, Kin/0000-0002-8576-4311;
Xue, Liang/0000-0002-2321-9019; Pandit, Yadav/0000-0003-2809-7943;
Yang, Yanyun/0000-0002-5982-1706; Alekseev, Igor/0000-0003-3358-9635;
Sumbera, Michal/0000-0002-0639-7323; Strikhanov,
Mikhail/0000-0003-2586-0405; Bruna, Elena/0000-0001-5427-1461; Huang,
Bingchu/0000-0002-3253-3210; Derradi de Souza,
Rafael/0000-0002-2084-7001; Suaide, Alexandre/0000-0003-2847-6556;
Okorokov, Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900;
Bhasin, Anju/0000-0002-3687-8179
FU RHIC Operations Group at BNL; RCF at BNL; NERSC Center at LBNL; Open
Science Grid consortium; Offices of NP and HEP within the U.S. DOE
Office of Science; U.S. NSF; Sloan Foundation; DFG "Origin and Structure
of the Universe" of Germany; CNRS/IN2P3; FAPESP CNPq of Brazil; Ministry
of Ed. and Sci. of the Russian Federation; NNSFC of China; CAS of China;
MoST of China; MoE of China; GA of the Czech Republic; MSMT of the Czech
Republic; FOM of the Netherlands; NWO of the Netherlands; DAE of India;
DST of India; CSIR of India; Polish Ministry of Sci. and Higher Ed.;
Korea Research Foundation; Ministry of Sci., Ed. and Sports of the Rep.
Of Croatia; RosAtom of Russia
FX We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at
LBNL, and the Open Science Grid consortium for providing resources and
support. We are grateful to D. de Florian, P. Nadolsky, and W. Vogelsang
for useful discussions. This work was supported in part by the Offices
of NP and HEP within the U.S. DOE Office of Science, the U.S. NSF, the
Sloan Foundation, the DFG cluster of excellence "Origin and Structure of
the Universe" of Germany, CNRS/IN2P3, FAPESP CNPq of Brazil, Ministry of
Ed. and Sci. of the Russian Federation, NNSFC, CAS, MoST, and MoE of
China, GA and MSMT of the Czech Republic, FOM and NWO of the
Netherlands, DAE, DST, and CSIR of India, Polish Ministry of Sci. and
Higher Ed., Korea Research Foundation, Ministry of Sci., Ed. and Sports
of the Rep. Of Croatia, and RosAtom of Russia.
NR 23
TC 33
Z9 33
U1 0
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 11
PY 2011
VL 106
IS 6
AR 062002
DI 10.1103/PhysRevLett.106.062002
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 721LV
UT WOS:000287357100008
PM 21405460
ER
PT J
AU Abdo, AA
Ackermann, M
Ajello, M
Allafort, A
Baldini, L
Ballet, J
Barbiellini, G
Bastieri, D
Bechtol, K
Bellazzini, R
Berenji, B
Blandford, RD
Bloom, ED
Bonamente, E
Borgland, AW
Bouvier, A
Brandt, TJ
Bregeon, J
Brez, A
Brigida, M
Bruel, P
Buehler, R
Buson, S
Caliandro, GA
Cameron, RA
Cannon, A
Caraveo, PA
Casandjian, JM
Celik, O
Charles, E
Chekhtman, A
Cheung, CC
Chiang, J
Ciprini, S
Claus, R
Cohen-Tanugi, J
Costamante, L
Cutini, S
D'Ammando, F
Dermer, CD
de Angelis, A
de Luca, A
de Palma, F
Digel, SW
Silva, EDE
Drell, PS
Drlica-Wagner, A
Dubois, R
Dumora, D
Favuzzi, C
Fegan, SJ
Ferrara, EC
Focke, WB
Fortin, P
Frailis, M
Fukazawa, Y
Funk, S
Fusco, P
Gargano, F
Gasparrini, D
Gehrels, N
Germani, S
Giglietto, N
Giordano, F
Giroletti, M
Glanzman, T
Godfrey, G
Grenier, IA
Grondin, MH
Grove, JE
Guiriec, S
Hadasch, D
Hanabata, Y
Harding, AK
Hayashi, K
Hayashida, M
Hays, E
Horan, D
Itoh, R
Johannesson, G
Johnson, AS
Johnson, TJ
Khangulyan, D
Kamae, T
Katagiri, H
Kataoka, J
Kerr, M
Knodlseder, J
Kuss, M
Lande, J
Latronico, L
Lee, SH
Lemoine-Goumard, M
Longo, F
Loparco, F
Lubrano, P
Madejski, GM
Makeev, A
Marelli, M
Mazziotta, MN
McEnery, JE
Michelson, PF
Mitthumsiri, W
Mizuno, T
Moiseev, AA
Monte, C
Monzani, ME
Morselli, A
Moskalenko, IV
Murgia, S
Nakamori, T
Naumann-Godo, M
Nolan, PL
Norris, JP
Nuss, E
Ohsugi, T
Okumura, A
Omodei, N
Ormes, JF
Ozaki, M
Paneque, D
Parent, D
Pelassa, V
Pepe, M
Pesce-Rollins, M
Pierbattista, M
Piron, F
Porter, TA
Raino, S
Rando, R
Ray, PS
Razzano, M
Reimer, A
Reimer, O
Reposeur, T
Ritz, S
Romani, RW
Sadrozinski, HFW
Sanchez, D
Parkinson, PMS
Scargle, JD
Schalk, TL
Sgro, C
Siskind, EJ
Smith, PD
Spandre, G
Spinelli, P
Strickman, MS
Suson, DJ
Takahashi, H
Takahashi, T
Tanaka, T
Thayer, JB
Thompson, DJ
Tibaldo, L
Torres, DF
Tosti, G
Tramacere, A
Troja, E
Uchiyama, Y
Vandenbroucke, J
Vasileiou, V
Vianello, G
Vitale, V
Wang, P
Wood, KS
Yang, Z
Ziegler, M
AF Abdo, A. A.
Ackermann, M.
Ajello, M.
Allafort, A.
Baldini, L.
Ballet, J.
Barbiellini, G.
Bastieri, D.
Bechtol, K.
Bellazzini, R.
Berenji, B.
Blandford, R. D.
Bloom, E. D.
Bonamente, E.
Borgland, A. W.
Bouvier, A.
Brandt, T. J.
Bregeon, J.
Brez, A.
Brigida, M.
Bruel, P.
Buehler, R.
Buson, S.
Caliandro, G. A.
Cameron, R. A.
Cannon, A.
Caraveo, P. A.
Casandjian, J. M.
Celik, O.
Charles, E.
Chekhtman, A.
Cheung, C. C.
Chiang, J.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Costamante, L.
Cutini, S.
D'Ammando, F.
Dermer, C. D.
de Angelis, A.
de Luca, A.
de Palma, F.
Digel, S. W.
do Couto e Silva, E.
Drell, P. S.
Drlica-Wagner, A.
Dubois, R.
Dumora, D.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Focke, W. B.
Fortin, P.
Frailis, M.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Gasparrini, D.
Gehrels, N.
Germani, S.
Giglietto, N.
Giordano, F.
Giroletti, M.
Glanzman, T.
Godfrey, G.
Grenier, I. A.
Grondin, M. -H.
Grove, J. E.
Guiriec, S.
Hadasch, D.
Hanabata, Y.
Harding, A. K.
Hayashi, K.
Hayashida, M.
Hays, E.
Horan, D.
Itoh, R.
Johannesson, G.
Johnson, A. S.
Johnson, T. J.
Khangulyan, D.
Kamae, T.
Katagiri, H.
Kataoka, J.
Kerr, M.
Knoedlseder, J.
Kuss, M.
Lande, J.
Latronico, L.
Lee, S. -H.
Lemoine-Goumard, M.
Longo, F.
Loparco, F.
Lubrano, P.
Madejski, G. M.
Makeev, A.
Marelli, M.
Mazziotta, M. N.
McEnery, J. E.
Michelson, P. F.
Mitthumsiri, W.
Mizuno, T.
Moiseev, A. A.
Monte, C.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Murgia, S.
Nakamori, T.
Naumann-Godo, M.
Nolan, P. L.
Norris, J. P.
Nuss, E.
Ohsugi, T.
Okumura, A.
Omodei, N.
Ormes, J. F.
Ozaki, M.
Paneque, D.
Parent, D.
Pelassa, V.
Pepe, M.
Pesce-Rollins, M.
Pierbattista, M.
Piron, F.
Porter, T. A.
Raino, S.
Rando, R.
Ray, P. S.
Razzano, M.
Reimer, A.
Reimer, O.
Reposeur, T.
Ritz, S.
Romani, R. W.
Sadrozinski, H. F. -W.
Sanchez, D.
Parkinson, P. M. Saz
Scargle, J. D.
Schalk, T. L.
Sgro, C.
Siskind, E. J.
Smith, P. D.
Spandre, G.
Spinelli, P.
Strickman, M. S.
Suson, D. J.
Takahashi, H.
Takahashi, T.
Tanaka, T.
Thayer, J. B.
Thompson, D. J.
Tibaldo, L.
Torres, D. F.
Tosti, G.
Tramacere, A.
Troja, E.
Uchiyama, Y.
Vandenbroucke, J.
Vasileiou, V.
Vianello, G.
Vitale, V.
Wang, P.
Wood, K. S.
Yang, Z.
Ziegler, M.
TI Gamma-Ray Flares from the Crab Nebula
SO SCIENCE
LA English
DT Article
ID PULSAR WIND NEBULAE; PARTICLE-ACCELERATION; HIGH-ENERGY; SYNCHROTRON
NEBULA; INVERSE COMPTON; EMISSION; TELESCOPE; POLARIZATION; RADIATION;
SPECTRUM
AB A young and energetic pulsar powers the well-known Crab Nebula. Here, we describe two separate gamma-ray (photon energy greater than 100 mega-electron volts) flares from this source detected by the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. The first flare occurred in February 2009 and lasted approximately 16 days. The second flare was detected in September 2010 and lasted approximately 4 days. During these outbursts, the gamma-ray flux from the nebula increased by factors of four and six, respectively. The brevity of the flares implies that the gamma rays were emitted via synchrotron radiation from peta-electron-volt (10(15) electron volts) electrons in a region smaller than 1.4 x 10(-2) parsecs. These are the highest-energy particles that can be associated with a discrete astronomical source, and they pose challenges to particle acceleration theory.
C1 [Ackermann, M.; Ajello, M.; Allafort, A.; Bechtol, K.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Bouvier, A.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Costamante, L.; Digel, S. W.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johnson, A. S.; Kamae, T.; Lande, J.; Lee, S. -H.; Madejski, G. M.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Omodei, N.; Paneque, D.; Porter, T. A.; Reimer, A.; Reimer, O.; Romani, R. W.; Tanaka, T.; Thayer, J. B.; Tramacere, A.; Uchiyama, Y.; Vandenbroucke, J.; Vianello, G.; Wang, P.] Stanford Univ, Dept Phys, Kavli Inst Particle Astrophys & Cosmol, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA.
[Ackermann, M.; Ajello, M.; Allafort, A.; Bechtol, K.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Bouvier, A.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Costamante, L.; Digel, S. W.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johnson, A. S.; Kamae, T.; Lande, J.; Lee, S. -H.; Madejski, G. M.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Omodei, N.; Paneque, D.; Porter, T. A.; Reimer, A.; Reimer, O.; Romani, R. W.; Tanaka, T.; Thayer, J. B.; Tramacere, A.; Uchiyama, Y.; Vandenbroucke, J.; Vianello, G.; Wang, P.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[Abdo, A. A.; Cheung, C. C.] Natl Acad Sci, Natl Res Council, Washington, DC 20001 USA.
[Abdo, A. A.; Cheung, C. C.] USN, Res Lab, Washington, DC 20375 USA.
[Baldini, L.; Bellazzini, R.; Bregeon, J.; Brez, A.; Kuss, M.; Latronico, L.; Pesce-Rollins, M.; Razzano, M.; Spandre, G.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Ballet, J.; Casandjian, J. M.; Grenier, I. A.; Naumann-Godo, M.; Pierbattista, M.; Tibaldo, L.] Univ Paris Diderot, CEA Saclay, Inst Res Fundamental Laws Universe, CNRS,CEA,Lab AIM,Serv Astrophys, F-91191 Gif Sur Yvette, France.
[Barbiellini, G.; Longo, F.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Barbiellini, G.; Longo, F.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
[Bastieri, D.; Buson, S.; Rando, R.; Tibaldo, L.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Bastieri, D.; Buson, S.; Rando, R.; Tibaldo, L.] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
[Bonamente, E.; Germani, S.; Lubrano, P.; Pepe, M.; Tosti, G.] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.
[Bonamente, E.; Ciprini, S.; Germani, S.; Lubrano, P.; Pepe, M.; Tosti, G.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
[Brandt, T. J.; Knoedlseder, J.] UPS, CNRS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 4, France.
[Brandt, T. J.; Smith, P. D.] Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Univ Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Politecn Bari, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; Monte, C.; Raino, S.; Spinelli, P.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Bruel, P.; Fegan, S. J.; Fortin, P.; Horan, D.; Sanchez, D.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Caliandro, G. A.; Hadasch, D.; Torres, D. F.] CSIC, IEEC, Inst Ciencies Espai, Barcelona 08193, Spain.
[Cannon, A.; Celik, O.; Ferrara, E. C.; Gehrels, N.; Harding, A. K.; Hays, E.; Johnson, T. J.; McEnery, J. E.; Moiseev, A. A.; Thompson, D. J.; Troja, E.; Vasileiou, V.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Cannon, A.] Univ Coll Dublin, Sch Phys, Dublin 4, Ireland.
[Caraveo, P. A.; Marelli, M.] Ist Astrofis Spaziale & Fis Cosm, Ist Nazl Astrofis, I-20133 Milan, Italy.
[Celik, O.; Moiseev, A. A.; Vasileiou, V.] CRESST, Greenbelt, MD 20771 USA.
[Celik, O.; Vasileiou, V.] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
[Celik, O.; Vasileiou, V.] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA.
[Chekhtman, A.; Makeev, A.; Parent, D.] George Mason Univ, Coll Sci, Fairfax, VA 22030 USA.
[Cohen-Tanugi, J.; Nuss, E.; Pelassa, V.; Piron, F.] Univ Montpellier 2, CNRS, IN2P3, Lab Phys Theor & Astroparticules, Montpellier, France.
[Cutini, S.; Gasparrini, D.] ASI, Sci Data Ctr, I-00044 Frascati, Roma, Italy.
[D'Ammando, F.] IASF Palermo, I-90146 Palermo, Italy.
[D'Ammando, F.] INAF IASF, I-00133 Rome, Italy.
[Dermer, C. D.; Grove, J. E.; Ray, P. S.; Strickman, M. S.; Wood, K. S.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[de Angelis, A.; Frailis, M.] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy.
[de Angelis, A.; Frailis, M.] Ist Nazl Fis Nucl, Sez Trieste, Grp Collegato Udine, I-33100 Udine, Italy.
[de Luca, A.] IUSS, I-27100 Pavia, Italy.
[Dumora, D.; Grondin, M. -H.; Lemoine-Goumard, M.; Reposeur, T.] Univ Bordeaux 1, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France.
[Frailis, M.] Ist Nazl Astrofis, Osservatorio Astron Trieste, I-34143 Trieste, Italy.
[Fukazawa, Y.; Hanabata, Y.; Hayashi, K.; Itoh, R.; Katagiri, H.; Mizuno, T.] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan.
[Giroletti, M.] INAF Ist Radioastron, I-40129 Bologna, Italy.
[Guiriec, S.] Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35899 USA.
[Johannesson, G.] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland.
[Johnson, T. J.; McEnery, J. E.; Moiseev, A. A.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[Johnson, T. J.; McEnery, J. E.; Moiseev, A. A.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Kataoka, J.; Nakamori, T.] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan.
[Kerr, M.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Morselli, A.; Vitale, V.] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.
[Norris, J. P.; Ormes, J. F.] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA.
[Ohsugi, T.; Takahashi, H.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan.
[Khangulyan, D.; Okumura, A.; Ozaki, M.; Takahashi, T.] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, Kanagawa 2525210, Japan.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria.
[Ritz, S.; Sadrozinski, H. F. -W.; Parkinson, P. M. Saz; Schalk, T. L.; Ziegler, M.] Univ Calif Santa Cruz, Dept Phys, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
[Ritz, S.; Sadrozinski, H. F. -W.; Parkinson, P. M. Saz; Schalk, T. L.; Ziegler, M.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Scargle, J. D.] NASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035 USA.
[Siskind, E. J.] NYCB Real Time Comp, Lattingtown, NY 11560 USA.
[Suson, D. J.] Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA.
[Torres, D. F.] ICREA, Barcelona, Spain.
[Tramacere, A.; Vianello, G.] CIFS, I-10133 Turin, Italy.
[Tramacere, A.] INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland.
[Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
[Yang, Z.] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
[Yang, Z.] Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.
RP Blandford, RD (reprint author), Stanford Univ, Dept Phys, Kavli Inst Particle Astrophys & Cosmol, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA.
EM rdb3@stanford.edu; buehler@stanford.edu; funk@slac.stanford.edu
RI Thompson, David/D-2939-2012; Harding, Alice/D-3160-2012; Rando,
Riccardo/M-7179-2013; Gehrels, Neil/D-2971-2012; McEnery,
Julie/D-6612-2012; Baldini, Luca/E-5396-2012; lubrano,
pasquale/F-7269-2012; Morselli, Aldo/G-6769-2011; Kuss,
Michael/H-8959-2012; giglietto, nicola/I-8951-2012; Reimer,
Olaf/A-3117-2013; Tosti, Gino/E-9976-2013; Saz Parkinson, Pablo
Miguel/I-7980-2013; Ozaki, Masanobu/K-1165-2013; Hays,
Elizabeth/D-3257-2012; Funk, Stefan/B-7629-2015; Loparco,
Francesco/O-8847-2015; Johannesson, Gudlaugur/O-8741-2015; Gargano,
Fabio/O-8934-2015; Moskalenko, Igor/A-1301-2007; Mazziotta, Mario
/O-8867-2015; Sgro, Carmelo/K-3395-2016; Torres, Diego/O-9422-2016;
OI Bastieri, Denis/0000-0002-6954-8862; Omodei, Nicola/0000-0002-5448-7577;
Pesce-Rollins, Melissa/0000-0003-1790-8018; De Luca,
Andrea/0000-0001-6739-687X; Giroletti, Marcello/0000-0002-8657-8852;
Cutini, Sara/0000-0002-1271-2924; Gasparrini, Dario/0000-0002-5064-9495;
Tramacere, Andrea/0000-0002-8186-3793; Thompson,
David/0000-0001-5217-9135; lubrano, pasquale/0000-0003-0221-4806;
Morselli, Aldo/0000-0002-7704-9553; giglietto,
nicola/0000-0002-9021-2888; Reimer, Olaf/0000-0001-6953-1385; Funk,
Stefan/0000-0002-2012-0080; Loparco, Francesco/0000-0002-1173-5673;
Johannesson, Gudlaugur/0000-0003-1458-7036; Gargano,
Fabio/0000-0002-5055-6395; Moskalenko, Igor/0000-0001-6141-458X;
Mazziotta, Mario /0000-0001-9325-4672; Torres,
Diego/0000-0002-1522-9065; De Angelis, Alessandro/0000-0002-3288-2517;
Frailis, Marco/0000-0002-7400-2135; Caraveo,
Patrizia/0000-0003-2478-8018; Sgro', Carmelo/0000-0001-5676-6214;
Baldini, Luca/0000-0002-9785-7726; Ray, Paul/0000-0002-5297-5278
FU NASA; U.S. Department of Energy in the United States; CEA/IRFU;
IN2P3/CNRS in France; ASI; INFN in Italy; Ministry of Education,
Culture, Sports, Science and Technology, High Energy Accelerator
Research Organization (KEK); JAXA in Japan; K.A. Wallenberg Foundation;
Swedish Research Council; National Space Board in Sweden; International
Doctorate on Astroparticle Physics
FX The Fermi LAT Collaboration acknowledges support from a number of
agencies and institutes for both development and the operation of the
LAT as well as scientific data analysis. These include NASA and the U.S.
Department of Energy in the United States; CEA/IRFU and IN2P3/CNRS in
France; ASI and INFN in Italy; the Ministry of Education, Culture,
Sports, Science and Technology, High Energy Accelerator Research
Organization (KEK), and JAXA in Japan; and the K.A. Wallenberg
Foundation, the Swedish Research Council, and the National Space Board
in Sweden. Additional support from INAF in Italy and CNES in France for
science analysis during the operations phase is also gratefully
acknowledged. L.T. was partially supported by the International
Doctorate on Astroparticle Physics program.
NR 39
TC 159
Z9 160
U1 0
U2 15
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
EI 1095-9203
J9 SCIENCE
JI Science
PD FEB 11
PY 2011
VL 331
IS 6018
BP 739
EP 742
DI 10.1126/science.1199705
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 719LH
UT WOS:000287205700062
PM 21212321
ER
PT J
AU Torok, T
Chandra, R
Pariat, E
Demoulin, P
Schmieder, B
Aulanier, G
Linton, MG
Mandrini, CH
AF Toeroek, T.
Chandra, R.
Pariat, E.
Demoulin, P.
Schmieder, B.
Aulanier, G.
Linton, M. G.
Mandrini, C. H.
TI FILAMENT INTERACTION MODELED BY FLUX ROPE RECONNECTION
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE methods: numerical; Sun: corona; Sun: filaments, prominences
ID CORONAL MASS EJECTIONS; SOLAR-FLARES; MAGNETIC-FIELD; ACTIVE-REGION;
TUBES; SIMULATIONS; EVOLUTION; TOPOLOGY; LOOP; CONFIGURATION
AB H alpha observations of solar active region NOAA 10501 on 2003 November 20 revealed a very uncommon dynamic process: during the development of a nearby flare, two adjacent elongated filaments approached each other, merged at their middle sections, and separated again, thereby forming stable configurations with new footpoint connections. The observed dynamic pattern is indicative of "slingshot" reconnection between two magnetic flux ropes. We test this scenario by means of a three-dimensional zero beta magnetohydrodynamic simulation, using a modified version of the coronal flux rope model by Titov and Demoulin as the initial condition for the magnetic field. To this end, a configuration is constructed that contains two flux ropes which are oriented side-by-side and are embedded in an ambient potential field. The choice of the magnetic orientation of the flux ropes and of the topology of the potential field is guided by the observations. Quasi-static boundary flows are then imposed to bring the middle sections of the flux ropes into contact. After sufficient driving, the ropes reconnect and two new flux ropes are formed, which now connect the former adjacent flux rope footpoints of opposite polarity. The corresponding evolution of filament material is modeled by calculating the positions of field line dips at all times. The dips follow the morphological evolution of the flux ropes, in qualitative agreement with the observed filaments.
C1 [Toeroek, T.; Chandra, R.; Pariat, E.; Demoulin, P.; Schmieder, B.; Aulanier, G.] Univ Paris Diderot, UPMC, CNRS, LESIA,Observ Paris, F-92190 Meudon, France.
[Toeroek, T.] Predict Sci Inc, San Diego, CA 92121 USA.
[Chandra, R.] Kumaun Univ, Dept Phys, Naini Tal 263002, Uttarakhand, India.
[Linton, M. G.] USN, Res Lab, Washington, DC 20375 USA.
[Mandrini, C. H.] UBA, CONICET, IAFE, Buenos Aires, DF, Argentina.
[Mandrini, C. H.] UBA, FCEN, Buenos Aires, DF, Argentina.
RP Torok, T (reprint author), Univ Paris Diderot, UPMC, CNRS, LESIA,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France.
OI Demoulin, Pascal/0000-0001-8215-6532
FU European Commission [218816, MTRM-CT-2006-035484]; NASA; Centre
Franco-Indien pour la Promotion de la Recherche Avancee (CEFIPRA);
UBACyT Argentina [X127]; ANPCyT Argentina [PICT 2007-1790]; ONR; NASA
[NNO6AD58I]; ECOS-Sud (France); MINCyT (Argentina) [A08U01]
FX We thank V. S. Titov and the anonymous referee for helpful comments. We
also thank W. Uddin for his contribution in obtaining the
Halpha data shown in Figure 1. The research leading to these
results has received funding from the European Commission's Seventh
Framework Programme (FP7/2007-2013) under the grant agreement n 218816
(SOTERIA project, http://www.soteria-space.eu). Financial support by the
European Commission through the SOLAIRE network (MTRM-CT-2006-035484) is
also gratefully acknowledged. T.T. was partially supported by the NASA
HTP and LWS programs. R.C. thanks the Centre Franco-Indien pour la
Promotion de la Recherche Avancee (CEFIPRA) for his postdoctoral grant.
The authors acknowledge financial support from CEFIPRA. C.H.M. thanks
the Argentinean grants UBACyT X127 and PICT 2007-1790 (ANPCyT). C.H.M.
is a member of the Carrera del Investigador Cientifico, CONICET. M.G.L
acknowledges financial support from ONR and NASA grant NNO6AD58I, and
thanks LESIA for hosting him during the 2010/11 academic year. The
authors acknowledge financial support from ECOS-Sud (France) and MINCyT
(Argentina) through their cooperative science program (No A08U01).
NR 36
TC 30
Z9 30
U1 2
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 10
PY 2011
VL 728
IS 1
AR 65
DI 10.1088/0004-637X/728/1/65
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 712GY
UT WOS:000286655500065
ER
PT J
AU Wilson, TL
Muders, D
Dumke, M
Henkel, C
Kawamura, JH
AF Wilson, T. L.
Muders, D.
Dumke, M.
Henkel, C.
Kawamura, Jonathan H.
TI THE SUBMILLIMETER J=6-5 LINE OF (CO)-C-13 IN ORION
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE ISM: individual objects (Orion BN/KL, Orion Hot Core); ISM: jets and
outflows; ISM: molecules; stars: early-type; submillimeter: stars
ID HEINRICH-HERTZ-TELESCOPE; MOLECULAR CLOUDS; APERTURE SYNTHESIS;
KLEINMANN-LOW; HOT CORE; EMISSION; STAR; KL; NEBULA; OMC-1
AB We present a fully sampled map covering the Orion Hot Core and dense molecular ridge, in the submillimeter J = 6-5 rotational transition of (CO)-C-13, at lambda = 0.45 mm with a resolution of 13 '' and 0.5 km s(-1). The map covers 3' by 2'. The profile centered on the Hot Core peaks at 8.5 km s(-1) and has a peak intensity of 40 K, corrected antenna temperature. It shows line wings from 30 km s(-1) to -20 km s(-1). The map of intensity, integrated from 0 to +18 km s(-1), shows a prominent maximum <5 '' from the center of the Orion Hot Core. The FWHP is 37 '' larger than the regions containing complex molecules. Single dish measurements of lines from the J = 2-1 or J = 1-0 transitions of CO isotopes show no such distinct maximum. Correcting for tau = 1.5 in the J = 6-5 line of (CO)-C-13, and assuming that the level populations are thermalized at 150 K, the beam-averaged column density between 0 to +18 km s(-1) is N((CO)-C-13) = 6.8 x 10(17) cm(-2) and N(CO) = 5.2 x 10(19) cm(-2). When combined with published dust emission data, the CO/H-2 number ratio is 2 x 10(-5), a factor of similar to 5 lower than the canonical value, 10(-4). For the Orion South and Orion Ridge region, the column density of CO is <25% of that found for the Hot Core but CO/H-2 ratios are similar. Models of photon dominated regions, PDRs, predict that CO lines from PDRs are only marginally optically thick. Thus, our map traces warm and dense molecular gas rather than PDRs.
C1 [Wilson, T. L.] USN, Res Lab, Washington, DC 20375 USA.
[Muders, D.; Henkel, C.] Max Planck Inst F Radioastron, D-53121 Bonn, Germany.
[Dumke, M.] European So Observ, Santiago 19, Chile.
[Kawamura, Jonathan H.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Wilson, TL (reprint author), USN, Res Lab, Code 7210, Washington, DC 20375 USA.
EM tom.wilson@nrl.navy.mil
FU Jet Propulsion Laboratory, California Institute of Technology, under a
contract with the National Aeronautics and Space Administration
FX We thank M. Wolfire for advice about the interpretation of PDR emission
in regard to 13CO. We also thank an anonymous referee for a
careful and critical reading of the draft. J.K.'s work was carried out
at the Jet Propulsion Laboratory, California Institute of Technology,
under a contract with the National Aeronautics and Space Administration.
NR 54
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U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 10
PY 2011
VL 728
IS 1
AR 61
DI 10.1088/0004-637X/728/1/61
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 712GY
UT WOS:000286655500061
ER
PT J
AU Radko, T
AF Radko, Timour
TI On the generation of large-scale structures in a homogeneous eddy field
SO JOURNAL OF FLUID MECHANICS
LA English
DT Article
DE instability; ocean processes; vortex interactions
ID MULTIPLE ZONAL JETS; STRATIFIED KOLMOGOROV FLOW; BETA-PLANE;
2-DIMENSIONAL TURBULENCE; NORTH-ATLANTIC; CELLULAR FLOWS; MODEL;
INSTABILITY; DYNAMICS; OCEANS
AB An analytical theory is developed which illustrates dynamics of the spontaneous generation of large-scale structures in the unforced two-dimensional eddying flows. The eddy field is represented by the closely packed array of standing coherent vortices whose intensity is weakly modulated by the long-wavelength perturbations introduced into the system. The asymptotic multiscale analysis makes it possible to identify instabilities resulting from the positive feedback of the background eddies on large-scale perturbations. Initially, these instabilities amplify at a rate proportional to the square root of their wavenumber. Linear growth is arrested when the amplitude of the long-wavelength perturbations reaches the level of background eddies. The subsequent evolutionary pattern is characterized by the emergence of relatively sharp features in the large-scale streamfunction field features suggestive of the coherent jets commonly observed in eddying geophysical flows. The proposed solutions differ substantially from their counterparts in forced-dissipative systems, exemplified by the canonical model of Kolmogorov flow. The asymptotic model is successfully tested against numerical simulations.
C1 USN, Postgrad Sch, Dept Oceanog, Monterey, CA USA.
RP Radko, T (reprint author), USN, Postgrad Sch, Dept Oceanog, Monterey, CA USA.
EM tradko@nps.edu
FU National Science Foundation [OCE 0623524]
FX The author thanks N. Balmforth, P. Berloff, I. Kamenkovich, W. Young and
reviewers for helpful comments. Support of the National Science
Foundation (grant OCE 0623524) is gratefully acknowledged.
NR 45
TC 6
Z9 6
U1 0
U2 2
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-1120
EI 1469-7645
J9 J FLUID MECH
JI J. Fluid Mech.
PD FEB 10
PY 2011
VL 668
BP 76
EP 99
DI 10.1017/S0022112010004568
PG 24
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 725GZ
UT WOS:000287634500005
ER
PT J
AU Gracia-Carpio, J
Sturm, E
Hailey-Dunsheath, S
Fischer, J
Contursi, A
Poglitsch, A
Genzel, R
Gonzalez-Alfonso, E
Sternberg, A
Verma, A
Christopher, N
Davies, R
Feuchtgruber, H
de Jong, JA
Lutz, D
Tacconi, LJ
AF Gracia-Carpio, J.
Sturm, E.
Hailey-Dunsheath, S.
Fischer, J.
Contursi, A.
Poglitsch, A.
Genzel, R.
Gonzalez-Alfonso, E.
Sternberg, A.
Verma, A.
Christopher, N.
Davies, R.
Feuchtgruber, H.
de Jong, J. A.
Lutz, D.
Tacconi, L. J.
TI FAR-INFRARED LINE DEFICITS IN GALAXIES WITH EXTREME L-FIR/M-H2 RATIOS
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE galaxies: evolution; galaxies: ISM; galaxies: starburst; infrared: ISM
ID STAR-FORMATION; INTERACTING GALAXIES; PHYSICAL CONDITIONS; MOLECULAR
GAS; HIGH-REDSHIFT; EMISSION; HERSCHEL; SPECTROSCOPY; PACS; DIAGNOSTICS
AB We report initial results from the far-infrared fine structure line observations of a sample of 44 local starbursts, Seyfert galaxies, and infrared luminous galaxies obtained with the PACS spectrometer on board Herschel. We show that the ratio between the far-infrared luminosity and the molecular gas mass, L-FIR/M-H2, is a much better proxy for the relative brightness of the far-infrared lines than L-FIR alone. Galaxies with high L-FIR/M-H2 ratios tend to have weaker fine structure lines relative to their far-infrared continuum than galaxies with L-FIR/M-H2 less than or similar to 80L(circle dot) M-circle dot(-1). A deficit of the [C II] 158 mu m line relative to L-FIR was previously found with the Infrared Space Observatory, but now we show for the first time that this is a general aspect of all far-infrared fine structure lines, regardless of their origin in the ionized or neutral phase of the interstellar medium. The L-FIR/M-H2 value where these line deficits start to manifest is similar to the limit that separates between the two modes of star formation recently found in galaxies on the basis of studies of their gas-star formation relations. Our finding that the properties of the interstellar medium are also significantly different in these regimes provides independent support for the different star-forming relations in normal disk galaxies and major merger systems. We use the spectral synthesis code Cloudy to model the emission of the lines. The expected increase of the ionization parameter with L-FIR/M-H2 can simultaneously explain the line deficits in the [C II], [N II], and [O I] lines.
C1 [Gracia-Carpio, J.; Sturm, E.; Hailey-Dunsheath, S.; Contursi, A.; Poglitsch, A.; Genzel, R.; Davies, R.; Feuchtgruber, H.; de Jong, J. A.; Lutz, D.; Tacconi, L. J.] Max Planck Inst Extraterr Phys MPE, D-85748 Garching, Germany.
[Fischer, J.] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
[Gonzalez-Alfonso, E.] Univ Alcala de Henares, Madrid 28871, Spain.
[Sternberg, A.] Tel Aviv Univ, Sackler Sch Phys & Astron, IL-69978 Ramat Aviv, Israel.
[Verma, A.; Christopher, N.] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England.
RP Gracia-Carpio, J (reprint author), Max Planck Inst Extraterr Phys MPE, Giessenbachstr 1, D-85748 Garching, Germany.
EM jgracia@mpe.mpg.de
FU BMVIT (Austria); ESA-PRODEX (Belgium); CEA/CNES (France); DLR (Germany);
ASI/INAF (Italy); CICYT/MCYT(Spain); US ONR; NHSC
FX We thank the referee, Greg Bothun, for his comments and suggestions,
which helped to clarify the Letter. PACS has been developed by a
consortium of institutes led by MPE (Germany) and including UVIE
(Austria); KU Leuven, CSL, IMEC (Belgium); CEA, LAM (France); MPIA
(Germany); INAF-IFSI/OAA/OAP/OAT, LENS, SISSA (Italy); IAC (Spain). This
development has been supported by the funding agencies BMVIT (Austria),
ESA-PRODEX (Belgium), CEA/CNES (France), DLR (Germany), ASI/INAF
(Italy), and CICYT/MCYT(Spain). Basic research in IR astronomy at NRL is
funded by the US ONR; J.F. also acknowledges support from the NHSC. E.
G.-A. is a Research Associate at the Harvard-Smithsonian Center for
Astrophysics.
NR 30
TC 92
Z9 92
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD FEB 10
PY 2011
VL 728
IS 1
AR L7
DI 10.1088/2041-8205/728/1/L7
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 711WV
UT WOS:000286623000007
ER
PT J
AU Mazin, II
Kimber, SAJ
Argyriou, DN
AF Mazin, I. I.
Kimber, Simon A. J.
Argyriou, Dimitri N.
TI Quasiparticle interference in antiferromagnetic parent compounds of
iron-based superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; MOTT INSULATOR; STATE
AB Recently reported quasiparticle interference imaging in underdoped Ca(Fe1-xCox)(2)As-2 shows pronounced C-2 asymmetry, which is interpreted as an indication of an electronic nematic phase with a unidirectional electron band, dispersive predominantly along the b axis of this orthorhombic material. On the other hand, even more recent transport measurements on untwinned samples show near isotropy of the resistivity in the ab plane, with slightly larger conductivity along a (and not b). We show that, in fact, both sets of data are consistent with the calculated ab initio Fermi surfaces, which have a decisively broken C-4 and yet similar Fermi velocity in both directions. This reconciles completely the apparent contradiction between the conclusions of the scanning tunneling microscopy and the transport experiments.
C1 [Mazin, I. I.] USN, Res Lab, Washington, DC 20375 USA.
[Kimber, Simon A. J.; Argyriou, Dimitri N.] Helmholtz Zentrum Berlin Mat & Energie, DE-14109 Berlin, Germany.
RP Mazin, II (reprint author), USN, Res Lab, Code 6393, Washington, DC 20375 USA.
RI Mazin, Igor/B-6576-2008;
OI Kimber, Simon/0000-0003-0489-1851
NR 23
TC 7
Z9 7
U1 1
U2 11
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD FEB 9
PY 2011
VL 83
IS 5
AR 052501
DI 10.1103/PhysRevB.83.052501
PG 4
WC Physics, Condensed Matter
SC Physics
GA 718NI
UT WOS:000287129700001
ER
PT J
AU Schwitters, M
Martin, DS
Unsworth, P
Farrell, T
Butler, JE
Marsili, M
Pulci, O
Weightman, P
AF Schwitters, M.
Martin, D. S.
Unsworth, P.
Farrell, T.
Butler, J. E.
Marsili, M.
Pulci, O.
Weightman, P.
TI Contribution of steps to optical properties of vicinal diamond (100):H
surfaces
SO PHYSICAL REVIEW B
LA English
DT Article
ID SCANNING-TUNNELING-MICROSCOPY; REFLECTANCE DIFFERENCE SPECTROSCOPY;
ANISOTROPY SPECTROSCOPY; SI(001) SURFACES; CHARGE-TRANSFER; FILMS;
GROWTH; ORIENTATION; SENSITIVITY; HYDROGEN
AB We apply reflection anisotropy spectroscopy (RAS) to high-quality atomically smooth H/C(100) 2 x 1 surfaces. The optical signal of the H/C(100) 0 degrees flat surface, and of the H/C(100) 2 degrees and H/C(100) 4 degrees vicinal surfaces, is investigated in terms of single and double steps. A comparison of experimental and theoretical results obtained from ab initio calculations shows that, in the energy range considered (1-5 eV), the RAS response can be interpreted in terms of single height S-B and double height D-A steps.
C1 [Schwitters, M.; Martin, D. S.; Unsworth, P.; Farrell, T.; Weightman, P.] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England.
[Schwitters, M.; Martin, D. S.; Unsworth, P.; Farrell, T.; Weightman, P.] Univ Liverpool, Surface Sci Res Ctr, Liverpool L69 7ZE, Merseyside, England.
[Butler, J. E.] USN, Res Labs, Washington, DC 20375 USA.
[Marsili, M.; Pulci, O.] Univ Roma Tor Vergata, Dipartimento Fis, CNR INFM NAST, ETSF, I-00133 Rome, Italy.
RP Schwitters, M (reprint author), Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England.
RI Butler, James/B-7965-2008
OI Butler, James/0000-0002-4794-7176
FU De Beers Diamond Research Committee; European Community [211956, 306]
FX MS and PW would like to acknowledge the De Beers Diamond Research
Committee for the award of a PhD studentship. OP and MM acknowledge CPU
time granted on CINECA, ENEA-CRESCO, and CASPUR supercomputer centers.
The research leading to these results has received funding from the
European Community's Seventh Framework Programme (FP7/2007-2013) under
grant agreement number 211956 (ETSF user project no. 306).
NR 52
TC 3
Z9 3
U1 0
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD FEB 9
PY 2011
VL 83
IS 8
AR 085402
DI 10.1103/PhysRevB.83.085402
PG 7
WC Physics, Condensed Matter
SC Physics
GA 718NZ
UT WOS:000287131900006
ER
PT J
AU Polisensky, E
Ricotti, M
AF Polisensky, Emil
Ricotti, Massimo
TI Constraints on the dark matter particle mass from the number of Milky
Way satellites
SO PHYSICAL REVIEW D
LA English
DT Article
ID SURFACE BRIGHTNESS GALAXIES; GAUSSIAN RANDOM-FIELDS; DIGITAL SKY SURVEY;
1ST BLACK-HOLES; DWARF GALAXIES; STERILE NEUTRINOS; INTERGALACTIC
MEDIUM; ROTATION CURVE; COSMOLOGICAL SIMULATIONS; GALACTIC SATELLITES
AB We have conducted N-body simulations of the growth of Milky Way-sized halos in cold and warm dark matter cosmologies. The number of dark matter satellites in our simulated Milky Ways decreases with decreasing mass of the dark matter particle. Assuming that the number of dark matter satellites exceeds or equals the number of observed satellites of the Milky Way, we derive lower limits on the dark matter particle mass. We find with 95% confidence m(s) > 13.3 keV for a sterile neutrino produced by the Dodelson and Widrow mechanism, m(s) > 8: 9 keV for the Shi and Fuller mechanism, m(s) > 3.0 keV for the Higgs decay mechanism, and m(WDM) > 2.3 keV for a thermal dark matter particle. The recent discovery of many new dark matter dominated satellites of the Milky Way in the Sloan Digital Sky Survey allows us to set lower limits comparable to constraints from the complementary methods of Lyman-alpha forest modeling and x-ray observations of the unresolved cosmic x-ray background and of dark matter halos from dwarf galaxy to cluster scales. Future surveys like LSST, DES, PanSTARRS, and SkyMapper have the potential to discover many more satellites and further improve constraints on the dark matter particle mass.
C1 [Polisensky, Emil] USN, Res Lab, Washington, DC 20375 USA.
[Polisensky, Emil; Ricotti, Massimo] Univ Maryland, Dept Astron, College Pk, MD 20745 USA.
RP Polisensky, E (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM emilp@astro.umd.edu
FU Naval Research Laboratory
FX It is our pleasure to thank Alexander Kusenko, Kev Abazajian, Signe
Riemer-Sorensen, Oleg Ruchayskiy, Maxim Khlopov, H.J. de Vega, N.G.
Sanchez, and Salucci Paolo for helpful discussions, comments, and
suggestions. Emil Polisensky acknowledges support under the Edison
Memorial Graduate Training Program at the Naval Research Laboratory.
NR 127
TC 67
Z9 68
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD FEB 7
PY 2011
VL 83
IS 4
AR 043506
DI 10.1103/PhysRevD.83.043506
PG 18
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 717HV
UT WOS:000287035200004
ER
PT J
AU Prak, DJL
Jahraus, WI
Sims, JM
MacArthur, AHR
AF Prak, Dianne J. Luning
Jahraus, Wesley I.
Sims, Jessica M.
MacArthur, Amy H. Roy
TI An H-1 NMR investigation into the loci of solubilization of
4-nitrotoluene, 2,6-dinitrotoluene, and 2,4,6-trinitrotoluene in
nonionic surfactant micelles
SO COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
LA English
DT Article
DE Aggregation number; Tritons; Tergitols; Brij; Nitroaromatics; NMR
ID POLYCYCLIC AROMATIC-HYDROCARBONS; SODIUM DODECYL-SULFATE; TRITON X-100;
NITROAROMATIC COMPOUNDS; ALCOHOL ETHOXYLATES; CONTAMINATED SOIL; ACTIVE
COMPOUNDS; AQUEOUS-SOLUTION; SELF-DIFFUSION; NMR
AB In this study, the enhancement in solubility of 4-nitrotoluene (4-NT), 2,6-dinitrotoluene (2,6-DNT), and 2,4,6-trinitrotoluene (TNT) and their loci of solubilization were determined in nonionic surfactant solutions containing linear alcohol ethoxylates (Brij-35, Brij-58. Brij-78, Brij-97 and Brij-98), alkylphenol ethoxylates (Tergitol NP-8 to NP-40), and octylphenol ethoxylates (Triton X-100, X-165, and X-305). In all surfactant solutions, 4-NT had the highest molar solubilization ratio (MSR) and TNT the lowest. For all surfactants, increasing the number of ethoxylate groups (EO) while keeping the hydrocarbon chain length constant decreased or did not significantly change the MSR. To determine the locus of solubilizadon. H-1 NMR spectroscopy was used to determine how the presence of a nitroaromatic solute changed the chemical shifts of the various hydrogen atoms on the surfactant molecule. For the linear alcohol ethoxylates, the greatest change in chemical shift for all three nitroarenes occurred at hydrogens in the hydrocarbon core of the micelle. At higher solute concentration, the nitroarenes spread to the first EO group near the core/shell interface. For both the Tritons and Tergitols, the chemical shift for a hydrogen on the phenyl ring changed the most upon the addition of the nitroarenes. As the nitroarene concentration increased, the chemical shifts for the hydrogens on the first DO group changed for all Triton and Tergitol surfactants. For all surfactants with shorter EO chains, the shifts for all ethoxylate hydrogens changed at higher nitroarene concentration. These results suggest that the solutes are preferentially solubilized at the core/shell interface but spread further into the shell and the core as solute concentration increases. Published by Elsevier By.
RP Prak, DJL (reprint author), USN Acad, 572M Holloway Rd, Annapolis, MD 21402 USA.
EM prak@usna.edu; flynavywj@gmail.com; abide3687@gmail.com;
macarthu@usna.edu
RI Luning Prak, Dianne/B-8503-2011
OI Luning Prak, Dianne/0000-0002-5589-7287
FU Office of Naval Research
FX The authors would like to thank Jackie Brown for her assistance in
maintaining the HPLC and the NMR, and the Office of Naval Research for
their financial support.
NR 54
TC 10
Z9 10
U1 1
U2 24
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-7757
J9 COLLOID SURFACE A
JI Colloid Surf. A-Physicochem. Eng. Asp.
PD FEB 5
PY 2011
VL 375
IS 1-3
BP 12
EP 22
DI 10.1016/j.colsurfa.2010.11.017
PG 11
WC Chemistry, Physical
SC Chemistry
GA 720MT
UT WOS:000287285500002
ER
PT J
AU Aggarwal, MM
Ahammed, Z
Alakhverdyants, AV
Alekseev, I
Alford, J
Anderson, BD
Anson, CD
Arkhipkin, D
Averichev, GS
Balewski, J
Beavis, DR
Bellwied, R
Betancourt, MJ
Betts, RR
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Biritz, B
Bland, LC
Borowski, W
Bouchet, J
Braidot, E
Brandin, AV
Bridgeman, A
Brovko, SG
Bruna, E
Bueltmann, S
Bunzarov, I
Burton, TP
Cai, XZ
Caines, H
Sanchez, MCD
Cebra, D
Cendejas, R
Cervantes, MC
Chajecki, Z
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Cheng, J
Cherney, M
Chikanian, A
Choi, KE
Christie, W
Chung, P
Codrington, MJM
Corliss, R
Cramer, JG
Crawford, HJ
Dash, S
Leyva, AD
De Silva, LC
Debbe, RR
Dedovich, TG
Derevschikov, AA
de Souza, RD
Didenko, L
Djawotho, P
Dogra, SM
Dong, X
Drachenberg, JL
Draper, JE
Dunlop, JC
Mazumdar, MRD
Efimov, LG
Elnimr, M
Engelage, J
Eppley, G
Estienne, M
Eun, L
Evdokimov, O
Fatemi, R
Fedorisin, J
Fersch, RG
Finch, E
Fine, V
Fisyak, Y
Gagliardi, CA
Gangadharan, DR
Geromitsos, A
Geurts, F
Ghosh, P
Gorbunov, YN
Gordon, A
Grebenyuk, O
Grosnick, D
Guertin, SM
Gupta, A
Guryn, W
Haag, B
Hajkova, O
Hamed, A
Han, LX
Harris, JW
Hays-Wehle, JP
Heinz, M
Heppelmann, S
Hirsch, A
Hjort, E
Hoffmann, GW
Hofman, DJ
Huang, B
Huang, HZ
Humanic, TJ
Huo, L
Igo, G
Jacobs, P
Jacobs, WW
Jena, C
Jin, F
Joseph, J
Judd, EG
Kabana, S
Kang, K
Kapitan, J
Kauder, K
Keane, D
Kechechyan, A
Kettler, D
Kikola, DP
Kiryluk, J
Kisiel, A
Kizka, V
Klein, SR
Knospe, AG
Koetke, DD
Kollegger, T
Konzer, J
Koralt, I
Koroleva, L
Korsch, W
Kotchenda, L
Kouchpil, V
Kravtsov, P
Krueger, K
Krus, M
Kumar, L
Kurnadi, P
Lamont, MAC
Landgraf, JM
LaPointe, S
Lauret, J
Lebedev, A
Lednicky, R
Lee, JH
Leight, W
LeVine, MJ
Li, C
Li, L
Li, N
Li, W
Li, X
Li, X
Li, Y
Li, ZM
Lisa, MA
Liu, F
Liu, H
Liu, J
Ljubicic, T
Llope, WJ
Longacre, RS
Love, WA
Lu, Y
Lukashov, EV
Luo, X
Ma, GL
Ma, YG
Mahapatra, DP
Majka, R
Mall, OI
Mangotra, LK
Manweiler, R
Margetis, S
Markert, C
Masui, H
Matis, HS
Matulenko, YA
McDonald, D
McShane, TS
Meschanin, A
Milner, R
Minaev, NG
Mioduszewski, S
Mischke, A
Mitrovski, MK
Mohanty, B
Mondal, MM
Morozov, B
Morozov, DA
Munhoz, MG
Naglis, M
Nandi, BK
Nayak, TK
Netrakanti, PK
Ng, MJ
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Oh, K
Ohlson, A
Okorokov, V
Oldag, EW
Olson, D
Pachr, M
Page, BS
Pal, SK
Pandit, Y
Panebratsev, Y
Pawlak, T
Pei, H
Peitzmann, T
Perkins, C
Peryt, W
Phatak, SC
Pile, P
Planinic, M
Ploskon, MA
Pluta, J
Plyku, D
Poljak, N
Poskanzer, AM
Potukuchi, BVKS
Powell, CB
Prindle, D
Pruneau, C
Pruthi, NK
Pujahari, PR
Putschke, J
Qiu, H
Raniwala, R
Raniwala, S
Ray, RL
Redwine, R
Reed, R
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Rose, A
Ruan, L
Rusnak, J
Sakai, S
Sakrejda, I
Sakuma, T
Salur, S
Sandweiss, J
Sangaline, E
Schambach, J
Scharenberg, RP
Schmah, AM
Schmitz, N
Schuster, TR
Seele, J
Seger, J
Selyuzhenkov, I
Seyboth, P
Shahaliev, E
Shao, M
Sharma, M
Shi, SS
Sichtermann, EP
Simon, F
Singaraju, RN
Skoby, MJ
Smirnov, N
Sorensen, P
Speltz, J
Spinka, HM
Srivastava, B
Stanislaus, TDS
Staszak, D
Steadman, SG
Stevens, JR
Stock, R
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Subba, NL
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Svirida, DN
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarini, LH
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Tlusty, D
Tokarev, M
Trainor, TA
Tram, VN
Trentalange, S
Tribble, RE
Tribedy, P
Tsai, OD
Ullrich, T
Underwood, DG
Van Buren, G
van Nieuwenhuizen, G
Vanfossen, JA
Varma, R
Vasconcelos, GMS
Vasiliev, AN
Videbaek, F
Viyogi, YP
Vokal, S
Voloshin, SA
Wada, M
Walker, M
Wang, F
Wang, G
Wang, H
Wang, JS
Wang, Q
Wang, XL
Wang, Y
Webb, G
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wissink, SW
Witt, R
Witzke, W
Wu, YF
Xie, W
Xu, H
Xu, N
Xu, QH
Xu, W
Xu, Y
Xu, Z
Xue, L
Yang, Y
Yepes, P
Yip, K
Yoo, IK
Yue, Q
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, JB
Zhang, S
Zhang, WM
Zhang, XP
Zhang, Y
Zhang, ZP
Zhao, J
Zhong, C
Zhou, W
Zhu, X
Zhu, YH
Zoulkarneev, R
Zoulkarneeva, Y
AF Aggarwal, M. M.
Ahammed, Z.
Alakhverdyants, A. V.
Alekseev, I.
Alford, J.
Anderson, B. D.
Anson, C. D.
Arkhipkin, D.
Averichev, G. S.
Balewski, J.
Beavis, D. R.
Bellwied, R.
Betancourt, M. J.
Betts, R. R.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Biritz, B.
Bland, L. C.
Borowski, W.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bridgeman, A.
Brovko, S. G.
Bruna, E.
Bueltmann, S.
Bunzarov, I.
Burton, T. P.
Cai, X. Z.
Caines, H.
Sanchez, M. Calderon de la Barca
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chajecki, Z.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Cheng, J.
Cherney, M.
Chikanian, A.
Choi, K. E.
Christie, W.
Chung, P.
Codrington, M. J. M.
Corliss, R.
Cramer, J. G.
Crawford, H. J.
Dash, S.
Leyva, A. Davila
De Silva, L. C.
Debbe, R. R.
Dedovich, T. G.
Derevschikov, A. A.
Derradi de Souza, R.
Didenko, L.
Djawotho, P.
Dogra, S. M.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Dunlop, J. C.
Mazumdar, M. R. Dutta
Efimov, L. G.
Elnimr, M.
Engelage, J.
Eppley, G.
Estienne, M.
Eun, L.
Evdokimov, O.
Fatemi, R.
Fedorisin, J.
Fersch, R. G.
Finch, E.
Fine, V.
Fisyak, Y.
Gagliardi, C. A.
Gangadharan, D. R.
Geromitsos, A.
Geurts, F.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Grebenyuk, O.
Grosnick, D.
Guertin, S. M.
Gupta, A.
Guryn, W.
Haag, B.
Hajkova, O.
Hamed, A.
Han, L-X.
Harris, J. W.
Hays-Wehle, J. P.
Heinz, M.
Heppelmann, S.
Hirsch, A.
Hjort, E.
Hoffmann, G. W.
Hofman, D. J.
Huang, B.
Huang, H. Z.
Humanic, T. J.
Huo, L.
Igo, G.
Jacobs, P.
Jacobs, W. W.
Jena, C.
Jin, F.
Joseph, J.
Judd, E. G.
Kabana, S.
Kang, K.
Kapitan, J.
Kauder, K.
Keane, D.
Kechechyan, A.
Kettler, D.
Kikola, D. P.
Kiryluk, J.
Kisiel, A.
Kizka, V.
Klein, S. R.
Knospe, A. G.
Koetke, D. D.
Kollegger, T.
Konzer, J.
Koralt, I.
Koroleva, L.
Korsch, W.
Kotchenda, L.
Kouchpil, V.
Kravtsov, P.
Krueger, K.
Krus, M.
Kumar, L.
Kurnadi, P.
Lamont, M. A. C.
Landgraf, J. M.
LaPointe, S.
Lauret, J.
Lebedev, A.
Lednicky, R.
Lee, J. H.
Leight, W.
LeVine, M. J.
Li, C.
Li, L.
Li, N.
Li, W.
Li, X.
Li, X.
Li, Y.
Li, Z. M.
Lisa, M. A.
Liu, F.
Liu, H.
Liu, J.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Love, W. A.
Lu, Y.
Lukashov, E. V.
Luo, X.
Ma, G. L.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mall, O. I.
Mangotra, L. K.
Manweiler, R.
Margetis, S.
Markert, C.
Masui, H.
Matis, H. S.
Matulenko, Yu. A.
McDonald, D.
McShane, T. S.
Meschanin, A.
Milner, R.
Minaev, N. G.
Mioduszewski, S.
Mischke, A.
Mitrovski, M. K.
Mohanty, B.
Mondal, M. M.
Morozov, B.
Morozov, D. A.
Munhoz, M. G.
Naglis, M.
Nandi, B. K.
Nayak, T. K.
Netrakanti, P. K.
Ng, M. J.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Oh, K.
Ohlson, A.
Okorokov, V.
Oldag, E. W.
Olson, D.
Pachr, M.
Page, B. S.
Pal, S. K.
Pandit, Y.
Panebratsev, Y.
Pawlak, T.
Pei, H.
Peitzmann, T.
Perkins, C.
Peryt, W.
Phatak, S. C.
Pile, P.
Planinic, M.
Ploskon, M. A.
Pluta, J.
Plyku, D.
Poljak, N.
Poskanzer, A. M.
Potukuchi, B. V. K. S.
Powell, C. B.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Pujahari, P. R.
Putschke, J.
Qiu, H.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Redwine, R.
Reed, R.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Rose, A.
Ruan, L.
Rusnak, J.
Sakai, S.
Sakrejda, I.
Sakuma, T.
Salur, S.
Sandweiss, J.
Sangaline, E.
Schambach, J.
Scharenberg, R. P.
Schmah, A. M.
Schmitz, N.
Schuster, T. R.
Seele, J.
Seger, J.
Selyuzhenkov, I.
Seyboth, P.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, S. S.
Sichtermann, E. P.
Simon, F.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Sorensen, P.
Speltz, J.
Spinka, H. M.
Srivastava, B.
Stanislaus, T. D. S.
Staszak, D.
Steadman, S. G.
Stevens, J. R.
Stock, R.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Subba, N. L.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Svirida, D. N.
Symons, T. J. M.
Szanto de Toledo, A.
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarini, L. H.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Tlusty, D.
Tokarev, M.
Trainor, T. A.
Tram, V. N.
Trentalange, S.
Tribble, R. E.
Tribedy, P.
Tsai, O. D.
Ullrich, T.
Underwood, D. G.
Van Buren, G.
van Nieuwenhuizen, G.
Vanfossen, J. A., Jr.
Varma, R.
Vasconcelos, G. M. S.
Vasiliev, A. N.
Videbaek, F.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Walker, M.
Wang, F.
Wang, G.
Wang, H.
Wang, J. S.
Wang, Q.
Wang, X. L.
Wang, Y.
Webb, G.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Witzke, W.
Wu, Y. F.
Xie, W.
Xu, H.
Xu, N.
Xu, Q. H.
Xu, W.
Xu, Y.
Xu, Z.
Xue, L.
Yang, Y.
Yepes, P.
Yip, K.
Yoo, I-K.
Yue, Q.
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, J. B.
Zhang, S.
Zhang, W. M.
Zhang, X. P.
Zhang, Y.
Zhang, Z. P.
Zhao, J.
Zhong, C.
Zhou, W.
Zhu, X.
Zhu, Y. H.
Zoulkarneev, R.
Zoulkarneeva, Y.
CA STAR Collaboration
TI Strange and multistrange particle production in Au plus Au collisions at
root s(NN)=62.4 GeV
SO PHYSICAL REVIEW C
LA English
DT Article
ID ENERGY-DEPENDENCE; HADRON-PRODUCTION; AU+AU COLLISIONS; FREEZE-OUT;
STAR; SPS
AB We present results on strange and multistrange particle production in Au + Au collisions at root s(NN) = 62.4 GeV as measured with the STAR detector at RHIC. Midrapidity transverse momentum spectra and integrated yields of K-S(0), Lambda, Xi, and Omega and their antiparticles are presented for different centrality classes. The particle yields and ratios follow a smooth energy dependence. Chemical freeze-out parameters, temperature, baryon chemical potential, and strangeness saturation factor obtained from the particle yields are presented. Intermediate transverse momentum (p(T)) phenomena are discussed based on the ratio of the measured baryon-to-meson spectra and nuclear modification factor. The centrality dependence of various measurements presented show a similar behavior as seen in Au + Au collisions at root s(NN) = 200 GeV.
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[Bridgeman, A.; Krueger, K.; Spinka, H. M.; Underwood, D. G.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Arkhipkin, D.; Beavis, D. R.; Bland, L. C.; Burton, T. P.; Christie, W.; Debbe, R. R.; Didenko, L.; Dunlop, J. C.; Fine, V.; Fisyak, Y.; Gordon, A.; Guryn, W.; Lamont, M. A. C.; Landgraf, J. M.; Lauret, J.; Lebedev, A.; Lee, J. H.; LeVine, M. J.; Ljubicic, T.; Longacre, R. S.; Love, W. A.; Ogawa, A.; Pile, P.; Ruan, L.; Sorensen, P.; Tang, A. H.; Tlusty, D.; Ullrich, T.; Van Buren, G.; Videbaek, F.; Webb, J. C.; Xu, Z.; Yip, K.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Crawford, H. J.; Engelage, J.; Judd, E. G.; Ng, M. J.; Perkins, C.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
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[Biritz, B.; Cendejas, R.; Gangadharan, D. R.; Guertin, S. M.; Huang, H. Z.; Igo, G.; Kurnadi, P.; Staszak, D.; Tsai, O. D.; Wang, G.; Whitten, C., Jr.; Xu, W.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
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[Cherney, M.; Gorbunov, Y. N.; McShane, T. S.; Seger, J.] Creighton Univ, Omaha, NE 68178 USA.
[Bielcik, J.; Hajkova, O.; Krus, M.; Pachr, M.] Czech Tech Univ, FNSPE, Prague 11519, Czech Republic.
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[Kollegger, T.; Mitrovski, M. K.; Schuster, T. R.; Stock, R.] Goethe Univ Frankfurt, Frankfurt, Germany.
[Dash, S.; Jena, C.; Mahapatra, D. P.; Phatak, S. C.] Inst Phys, Bhubaneswar 751005, Orissa, India.
[Nandi, B. K.; Pujahari, P. R.; Varma, R.] Indian Inst Technol, Bombay 400076, Maharashtra, India.
[Jacobs, W. W.; Page, B. S.; Selyuzhenkov, I.; Stevens, J. R.; Wissink, S. W.] Indiana Univ, Bloomington, IN 47408 USA.
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[Alakhverdyants, A. V.; Averichev, G. S.; Bunzarov, I.; Dedovich, T. G.; Efimov, L. G.; Fedorisin, J.; Kechechyan, A.; Kizka, V.; Lednicky, R.; Panebratsev, Y.; Rogachevskiy, O. V.; Shahaliev, E.; Vokal, S.; Zoulkarneev, R.; Zoulkarneeva, Y.] Joint Inst Nucl Res, Dubna 141980, Russia.
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[Qiu, H.; Sun, Z.; Wang, J. S.; Xu, H.; Yang, Y.; Zhan, W.] Inst Modern Phys, Lanzhou, Peoples R China.
[Ahammed, Z.; Dong, X.; Grebenyuk, O.; Hjort, E.; Jacobs, P.; Kikola, D. P.; Kiryluk, J.; Klein, S. R.; Masui, H.; Matis, H. S.; Naglis, M.; Odyniec, G.; Olson, D.; Ploskon, M. A.; Poskanzer, A. M.; Powell, C. B.; Ritter, H. G.; Rose, A.; Sakai, S.; Sakrejda, I.; Schmah, A. M.; Sichtermann, E. P.; Sun, X. M.; Symons, T. J. M.; Thomas, J. H.; Tribble, R. E.; Wieman, H.; Xu, N.; Zhang, Y.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Balewski, J.; Betancourt, M. J.; Corliss, R.; Hays-Wehle, J. P.; Leight, W.; Milner, R.; Redwine, R.; Sakuma, T.; Seele, J.; Steadman, S. G.; Surrow, B.; van Nieuwenhuizen, G.; Walker, M.] MIT, Cambridge, MA 02139 USA.
[Schmitz, N.; Seyboth, P.; Simon, F.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Tarnowsky, T.; Tram, V. N.; Wang, H.; Westfall, G. D.] Michigan State Univ, E Lansing, MI 48824 USA.
[Brandin, A. V.; Kotchenda, L.; Kravtsov, P.; Lukashov, E. V.; Okorokov, V.; Strikhanov, M.] Moscow Engn Phys Inst, Moscow 115409, Russia.
[Braidot, E.; Mischke, A.; Peitzmann, T.] NIKHEF, Amsterdam, Netherlands.
[Braidot, E.; Mischke, A.; Peitzmann, T.] Univ Utrecht, Amsterdam, Netherlands.
[Anson, C. D.; Chajecki, Z.; Humanic, T. J.; Lisa, M. A.] Ohio State Univ, Columbus, OH 43210 USA.
[Bueltmann, S.; Koralt, I.; Plyku, D.] Old Dominion Univ, Norfolk, VA 23529 USA.
[Eun, L.; Heppelmann, S.] Penn State Univ, University Pk, PA 16802 USA.
[Derevschikov, A. A.; Matulenko, Yu. A.; Meschanin, A.; Minaev, N. G.; Morozov, D. A.; Nogach, L. V.; Nurushev, S. B.; Vasiliev, A. N.] Inst High Energy Phys, Protvino, Russia.
[Hirsch, A.; Konzer, J.; Li, X.; Netrakanti, P. K.; Scharenberg, R. P.; Skoby, M. J.; Srivastava, B.; Stringfellow, B.; Wang, F.; Wang, Q.; Xie, W.] Purdue Univ, W Lafayette, IN 47907 USA.
[Choi, K. E.; Oh, K.; Yoo, I-K.] Pusan Natl Univ, Pusan 609735, South Korea.
[Raniwala, R.; Raniwala, S.] Univ Rajasthan, Jaipur 302004, Rajasthan, India.
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[Munhoz, M. G.; Suaide, A. A. P.; Szanto de Toledo, A.; Tian, J.] Univ Sao Paulo, Sao Paulo, Brazil.
[Chen, H. F.; Huang, B.; Li, C.; Lu, Y.; Luo, X.; Shao, M.; Sun, Y.; Tang, Z.; Tokarev, M.; Wang, X. L.; Xu, Y.; Zhang, Z. P.] Univ Sci & Technol China, Hefei 230026, Peoples R China.
[Li, X.; Xu, Q. H.; Zhou, W.] Shandong Univ, Jinan 250100, Shandong, Peoples R China.
[Cai, X. Z.; Chen, J. H.; Han, L-X.; Jin, F.; Li, W.; Ma, G. L.; Ma, Y. G.; Xue, L.; Zhang, S.; Zhao, J.; Zhong, C.; Zhu, Y. H.] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
[Borowski, W.; Estienne, M.; Geromitsos, A.; Kabana, S.; Speltz, J.] SUBATECH, Nantes, France.
[Cervantes, M. C.; Codrington, M. J. M.; Djawotho, P.; Drachenberg, J. L.; Gagliardi, C. A.; Hamed, A.; Huo, L.; Mioduszewski, S.] Texas A&M Univ, College Stn, TX 77843 USA.
[Leyva, A. Davila; Hoffmann, G. W.; Li, L.; Markert, C.; Oldag, E. W.; Ray, R. L.; Schambach, J.; Thein, D.; Trentalange, S.; Wada, M.] Univ Texas Austin, Austin, TX 78712 USA.
[Cheng, J.; Kang, K.; Li, Y.; Wang, Y.; Yue, Q.; Zhang, X. P.; Zhu, X.] Tsinghua Univ, Beijing 100084, Peoples R China.
[Witt, R.] USN Acad, Annapolis, MD 21402 USA.
[Grosnick, D.; Koetke, D. D.; Manweiler, R.; Stanislaus, T. D. S.] Valparaiso Univ, Valparaiso, IN 46383 USA.
[Chattopadhyay, S.; Mazumdar, M. R. Dutta; Ghosh, P.; Mohanty, B.; Mondal, M. M.; Nayak, T. K.; Pal, S. K.; Singaraju, R. N.; Tribedy, P.; Viyogi, Y. P.] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, India.
[Kisiel, A.; Pawlak, T.; Peryt, W.; Pluta, J.; Zawisza, M.; Zbroszczyk, H.] Warsaw Univ Technol, Warsaw, Poland.
[Bichsel, H.; Cramer, J. G.; Kettler, D.; Prindle, D.] Univ Washington, Seattle, WA 98195 USA.
[Bellwied, R.; De Silva, L. C.; Elnimr, M.; LaPointe, S.; Pruneau, C.; Sharma, M.; Tarini, L. H.; Trainor, T. A.; Voloshin, S. A.] Wayne State Univ, Detroit, MI 48201 USA.
[Chen, J. Y.; Li, N.; Li, Z. M.; Liu, F.; Shi, S. S.; Wu, Y. F.; Zhang, J. B.] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Bruna, E.; Caines, H.; Chikanian, A.; Finch, E.; Harris, J. W.; Heinz, M.; Knospe, A. G.; Majka, R.; Ohlson, A.; Putschke, J.; Sandweiss, J.; Smirnov, N.] Yale Univ, New Haven, CT 06520 USA.
[Planinic, M.; Poljak, N.] Univ Zagreb, HR-10002 Zagreb, Croatia.
RP Aggarwal, MM (reprint author), Panjab Univ, Chandigarh 160014, India.
RI Okorokov, Vitaly/C-4800-2017; Ma, Yu-Gang/M-8122-2013; Pandit,
Yadav/I-2170-2013; Lednicky, Richard/K-4164-2013; Yang,
Yanyun/B-9485-2014; Mischke, Andre/D-3614-2011; Takahashi,
Jun/B-2946-2012; Planinic, Mirko/E-8085-2012; Peitzmann,
Thomas/K-2206-2012; Witt, Richard/H-3560-2012; Yip, Kin/D-6860-2013;
Rusnak, Jan/G-8462-2014; Bielcikova, Jana/G-9342-2014; Xue,
Liang/F-8077-2013; Voloshin, Sergei/I-4122-2013; Alekseev,
Igor/J-8070-2014; Sumbera, Michal/O-7497-2014; Strikhanov,
Mikhail/P-7393-2014; Xu, Wenqin/H-7553-2014; Bruna, Elena/C-4939-2014;
Dogra, Sunil /B-5330-2013; Chaloupka, Petr/E-5965-2012; Huang,
Bingchu/H-6343-2015; Derradi de Souza, Rafael/M-4791-2013; Suaide,
Alexandre/L-6239-2016; Svirida, Dmitry/R-4909-2016; Inst. of Physics,
Gleb Wataghin/A-9780-2017
OI Okorokov, Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900;
Pandit, Yadav/0000-0003-2809-7943; Yang, Yanyun/0000-0002-5982-1706;
Takahashi, Jun/0000-0002-4091-1779; Peitzmann,
Thomas/0000-0002-7116-899X; Yip, Kin/0000-0002-8576-4311; Xue,
Liang/0000-0002-2321-9019; Alekseev, Igor/0000-0003-3358-9635; Sumbera,
Michal/0000-0002-0639-7323; Strikhanov, Mikhail/0000-0003-2586-0405; Xu,
Wenqin/0000-0002-5976-4991; Bruna, Elena/0000-0001-5427-1461; Huang,
Bingchu/0000-0002-3253-3210; Derradi de Souza,
Rafael/0000-0002-2084-7001; Suaide, Alexandre/0000-0003-2847-6556;
FU RHIC Operations Group and RCF at BNL; NERSC Center at LBNL; Open Science
Grid consortium; offices of NP and HEP within the US DOE Office of
Science; US NSF; Sloan Foundation; DFG cluster of excellence "Origin and
Structure of the Universe" of Germany; FAPESP CNPq of Brazil
[CNRS/IN2P3]; Ministry of Education and Science of the Russian
Federation; NNSFC, CAS, MoST, and MoE of China; GA and MSMT of the Czech
Republic; FOM and NWO of the Netherlands; DAE, DST, and CSIR of India;
Polish Ministry of Science and Higher Education; Korea Research
Foundation; Ministry of Science, Education and Sports of the Republic of
Croatia; RosAtom of Russia
FX We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at
LBNL, and the Open Science Grid consortium for providing resources and
support. This work was supported in part by the offices of NP and HEP
within the US DOE Office of Science; the US NSF; the Sloan Foundation;
the DFG cluster of excellence "Origin and Structure of the Universe" of
Germany; CNRS/IN2P3, the FAPESP CNPq of Brazil; the Ministry of
Education and Science of the Russian Federation; NNSFC, CAS, MoST, and
MoE of China; GA and MSMT of the Czech Republic; FOM and NWO of the
Netherlands, DAE, DST, and CSIR of India; the Polish Ministry of Science
and Higher Education; Korea Research Foundation; the Ministry of
Science, Education and Sports of the Republic of Croatia; and RosAtom of
Russia.
NR 41
TC 48
Z9 49
U1 0
U2 11
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD FEB 4
PY 2011
VL 83
IS 2
AR 024901
DI 10.1103/PhysRevC.83.024901
PG 16
WC Physics, Nuclear
SC Physics
GA 716OB
UT WOS:000286982200001
ER
PT J
AU McCormack, JP
Nathan, TR
Cordero, EC
AF McCormack, J. P.
Nathan, T. R.
Cordero, E. C.
TI The effect of zonally asymmetric ozone heating on the Northern
Hemisphere winter polar stratosphere
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID MODELS; NWP
AB Previous modeling studies have found significant differences in winter extratropical stratospheric temperatures depending on the presence or absence of zonally asymmetric ozone heating (ZAOH), yet the physical mechanism causing these differences has not been fully explained. The present study describes the effect of ZAOH on the dynamics of the Northern Hemisphere extratropical stratosphere using an ensemble of free-running atmospheric general circulation model simulations over the 1 December - 31 March period. We find that the simulations including ZAOH produce a significantly warmer and weaker stratospheric polar vortex in mid-February due to more frequent major stratospheric sudden warmings compared to the simulations using only zonal mean ozone heating. This is due to regions of enhanced Eliassen-Palm flux convergence found in the region between 40 degrees N-70 degrees N latitude and 10-0.05 hPa. These results are consistent with changes in the propagation of planetary waves in the presence of ZAOH predicted by an ozone-modified refractive index. Citation: McCormack, J. P., T. R. Nathan, and E. C. Cordero (2011), The effect of zonally asymmetric ozone heating on the Northern Hemisphere winter polar stratosphere, Geophys. Res. Lett., 38, L03802, doi:10.1029/2010GL045937.
C1 [McCormack, J. P.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Nathan, T. R.] Univ Calif Davis, Dept Land Air & Water Resources, Atmospher Sci Program, Davis, CA 95616 USA.
[Cordero, E. C.] San Jose State Univ, Dept Meteorol & Climate Sci, San Jose, CA 95192 USA.
RP McCormack, JP (reprint author), USN, Res Lab, Div Space Sci, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM john.mccormack@nrl.navy.mil
RI Nathan, Terrence/F-5958-2011;
OI McCormack, John/0000-0002-3674-0508
FU Office of Naval Research; NASA [NNH08AI67I]; NSF [ATM-0733698,
ATM-0449996]; NASA/NRL [NNH08AI67I]
FX We thank John Albers helpful discussions during the preparation of this
manuscript. JPM was supported in part by the Office of Naval Research
and in part by the NASA Heliophysics Living With a Star Program award
NNH08AI67I. TRN was supported in part by NSF grant ATM-0733698 and by
NASA/NRL grant NNH08AI67I. ECC was supported by NSF's Faculty Early
Career Development (CAREER) Program, grant ATM-0449996.
NR 15
TC 9
Z9 9
U1 1
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD FEB 3
PY 2011
VL 38
AR L03802
DI 10.1029/2010GL045937
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 717JA
UT WOS:000287038300001
ER
PT J
AU Zhang, JY
Yoganandan, N
Pintar, FA
Guan, YB
Shender, B
Paskoff, G
Laud, P
AF Zhang, Jiangyue
Yoganandan, Narayan
Pintar, Frank A.
Guan, Yabo
Shender, Barry
Paskoff, Glenn
Laud, Purushottam
TI Effects of tissue preservation temperature on high strain-rate material
properties of brain
SO JOURNAL OF BIOMECHANICS
LA English
DT Article
DE Brain tissue; High strain-rate; Material properties; Postmortem; Tissue
preservation
ID FINITE-ELEMENT-ANALYSIS; MECHANICAL-BEHAVIOR; TERRORIST BOMBINGS; BLAST
INJURY; HEAD-INJURY; SHEAR; MODEL; CASUALTIES; EXPLOSION; STEM
AB Postmortem preservation conditions may be one of factors contributing to wide material property variations in brain tissues in literature. The objective of present study was to determine the effects of preservation temperatures on high strain-rate material properties of brain tissues using the split Hopkinson pressure bar (SHPB). Porcine brains were harvested immediately after sacrifice, sliced into 2 mm thickness, preserved in ice cold (group A, 10 samples) and 37 degrees C (group B, 9 samples) saline solution and warmed to 37 degrees C just prior to the test. A SHPB with tube aluminum transmission bar and semiconductor strain gauges were used to enhance transmitted wave signals. Data were gathered using a digital acquisition system and processed to obtain stress-strain curves. All tests were conducted within 4 h postmortem. The mean strain-rate was 2487 +/- 72 s(-1). A repeated measures model with specimen-level random effects was used to analyze log transformed stress-strain responses through the entire loading range. The mean stress-strain curves with +/- 95% confidence bands demonstrated typical power relationships with the power value of 2.4519 (standard error, 0.0436) for group A and 2.2657 (standard error, 0.0443) for group B, indicating that responses for the two groups are significantly different. Stresses and tangent moduli rose with increasing strain levels in both groups. These findings indicate that storage temperatures affected brain tissue material properties and preserving tissues at 37 degrees C produced a stiffer response at high strain-rates. Therefore, it is necessary to incorporate material properties obtained from appropriately preserved tissues to accurately predict the responses of brain using stress analyses models, such as finite element simulations. Published by Elsevier Ltd.
C1 [Zhang, Jiangyue; Yoganandan, Narayan; Pintar, Frank A.; Guan, Yabo] Med Coll Wisconsin, Dept Neurosurg, Milwaukee, WI 53226 USA.
[Laud, Purushottam] Med Coll Wisconsin, Dept Biostat, Milwaukee, WI 53226 USA.
[Shender, Barry; Paskoff, Glenn] USN, Air Warfare Ctr, Div Aircraft, Patuxent River, MD USA.
RP Zhang, JY (reprint author), Med Coll Wisconsin, Dept Neurosurg, Milwaukee, WI 53226 USA.
EM jyzhang918@gmail.com
FU Office of Naval Research through Naval Air Warfare Center Aircraft
Division [N00421-06-C-0046]; VA Medical Research
FX This research was supported in part by the Office of Naval Research
through Naval Air Warfare Center Aircraft Division contract
N00421-06-C-0046 and VA Medical Research.
NR 35
TC 13
Z9 13
U1 0
U2 6
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0021-9290
J9 J BIOMECH
JI J. Biomech.
PD FEB 3
PY 2011
VL 44
IS 3
BP 391
EP 396
DI 10.1016/j.jbiomech.2010.10.024
PG 6
WC Biophysics; Engineering, Biomedical
SC Biophysics; Engineering
GA 724BL
UT WOS:000287551000005
PM 21055756
ER
PT J
AU Kim, Y
Best, RB
Mittal, J
AF Kim, Youngchan
Best, Robert B.
Mittal, Jeetain
TI Bind'NGO: Flexible Docking Model for Multiprotein Complexes with
Intrinsically Disordered Segments
SO BIOPHYSICAL JOURNAL
LA English
DT Meeting Abstract
CT 55th Annual Meeting of the Biophysical-Society
CY MAR 05-09, 2011
CL Baltimore, MD
SP Biophys Soc
C1 [Kim, Youngchan] USN, Res Lab, Washington, DC 20375 USA.
[Best, Robert B.] Univ Cambridge, Cambridge, England.
[Mittal, Jeetain] Lehigh Univ, Bethlehem, PA 18015 USA.
RI Best, Robert/H-7588-2016
OI Best, Robert/0000-0002-7893-3543
NR 0
TC 0
Z9 0
U1 0
U2 1
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD FEB 2
PY 2011
VL 100
IS 3
SU 1
BP 198
EP 198
PG 1
WC Biophysics
SC Biophysics
GA 972PF
UT WOS:000306288601457
ER
PT J
AU Weber, PW
Howle, LE
Murray, MM
Corless, JM
AF Weber, Paul W.
Howle, Laurens E.
Murray, Mark M.
Corless, Joseph M.
TI A Simplified Mass-Transfer Model for Visual Pigments in Amphibian
Retinal-Cone Outer Segments
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID 3-DIMENSIONAL MEMBRANE CRYSTALS; TERMINAL LOOP REGION; DISK MEMBRANES;
DISTAL INVAGINATIONS; STRUCTURAL FEATURES; LATERAL DIFFUSION; RENEWAL;
FROG; MORPHOGENESIS; PROTEIN
AB When radiolabeled precursors and autoradiography are used to investigate turnover of protein components in photoreceptive cone outer segments (COSs), the labeled components primarily visual pigment molecules (opsins)-are diffusely distributed along the COS. To further assess this COS labeling pattern, we derive a simplified mass-transfer model for quantifying the contributions of advective and diffusive mechanisms to the distribution of opsins within COSs of the frog retina. Two opsin-containing regions of the COS are evaluated: the core axial array of disks and the plasmalemma. Numerical solutions of the mass-transfer model indicate three distinct stages of system evolution. In the first stage, plasmalemma diffusion is dominant. In the second stage, the plasmalemma density reaches a metastable state and transfer between the plasmalemma and disk region occurs, which is followed by an increase in density that is qualitatively similar for both regions. The final stage consists of both regions slowly evolving to the steady-state solution. Our results indicate that autoradiographic and cognate approaches for tracking labeled opsins in the COS cannot be effective methodologies for assessing new disk formation at the base of the COS.
C1 [Weber, Paul W.; Howle, Laurens E.] Duke Univ, Dept Mech Engn & Mat Sci, Durham, NC 27706 USA.
[Howle, Laurens E.] Duke Univ, Ctr Nonlinear & Complex Syst, Durham, NC USA.
[Murray, Mark M.] USN Acad, Dept Mech Engn, Annapolis, MD USA.
[Corless, Joseph M.] Duke Univ, Med Ctr, Dept Cell Biol, Durham, NC 27710 USA.
[Corless, Joseph M.] Duke Univ, Med Ctr, Dept Neurobiol, Durham, NC 27710 USA.
[Corless, Joseph M.] Duke Univ, Med Ctr, Dept Ophthalmol, Durham, NC 27710 USA.
RP Howle, LE (reprint author), Duke Univ, Dept Mech Engn & Mat Sci, Durham, NC 27706 USA.
EM laurens.howle@duke.edu
FU Whitaker Foundation [RG-98-0246]; Office of Naval Research
FX This work is supported by a Whitaker Foundationgrant (RG-98-0246).
P.W.W. is supported by a National Defense Science and Engineering
Graduate (NDSEG) Fellowship through the Office of Naval Research.
NR 29
TC 2
Z9 2
U1 0
U2 1
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD FEB 2
PY 2011
VL 100
IS 3
BP 525
EP 534
DI 10.1016/j.bpj.2010.11.085
PG 10
WC Biophysics
SC Biophysics
GA 716GN
UT WOS:000286957200002
PM 21281566
ER
PT J
AU Heltemes, KJ
Dougherty, AL
MacGregor, AJ
Galameau, MR
AF Heltemes, Kevin J.
Dougherty, Amber L.
MacGregor, Andrew J.
Galameau, Michael R.
TI Alcohol Abuse Disorders Among US Service Members With Mild Traumatic
Brain Injury
SO MILITARY MEDICINE
LA English
DT Article
ID OPERATION-IRAQI-FREEDOM; COMBAT DEPLOYMENT; SUBSTANCE-ABUSE; NECK
INJURIES; DRUG-USE; VETERANS; WAR; AFGHANISTAN; DRINKING; OUTCOMES
AB Traumatic brain injury (TBI) has emerged as a preeminent injury in Iraq and Afghanistan. The relationship between TBI and post-injury alcohol use in military personnel has not been clearly defined. The aim of this study was to examine the prevalence of alcohol abuse disorders among combat-injured service members with mild TB! (MTBI). Male U.S. service members with combat injuries were identified from the Expeditionary Medical Encounter Database (n = 3,123). Diagnoses of alcohol abuse disorders were collected from the standard inpatient and ambulatory data records. Overall, a slightly higher proportion of service members with MTBI were diagnosed with an alcohol abuse disorder compared to those with other injury (6.1% vs. 4.9%). In a multivariate analysis, however, it was found that MTBI was not associated with higher levels of alcohol abuse (odds ratio, 1.24; 95% confidence interval, 0.90, 1.70). To better define the consequences of MTBI, future research should include other alcohol dependency measures along with comorbid mental health disorders.
C1 [Heltemes, Kevin J.; Dougherty, Amber L.; MacGregor, Andrew J.; Galameau, Michael R.] USN, Hlth Res Ctr, San Diego, CA 92106 USA.
RP Heltemes, KJ (reprint author), USN, Hlth Res Ctr, 140 Sylvester Rd, San Diego, CA 92106 USA.
FU U.S. Navy Bureau of Medicine and Surgery, Washington, DC, under Work
Unit [60808]
FX The authors thank Science Applications International Corporation for its
contributions to this work. This study was supported by the U.S. Navy
Bureau of Medicine and Surgery, Washington, DC, under Work Unit No.
60808.
NR 34
TC 14
Z9 14
U1 1
U2 7
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD FEB
PY 2011
VL 176
IS 2
BP 147
EP 150
PG 4
WC Medicine, General & Internal
SC General & Internal Medicine
GA 825BL
UT WOS:000295245800008
PM 21366075
ER
PT J
AU Williams, IW
Kennedy, BS
AF Williams, Isaiah W.
Kennedy, Byron S.
TI Texting tendinitis in a teenager
SO JOURNAL OF FAMILY PRACTICE
LA English
DT Article
C1 [Williams, Isaiah W.] Naval Hosp, Dept Family Med, Lemoore, CA USA.
[Kennedy, Byron S.] Monroe Cty Dept Publ Hlth, Rochester, NY USA.
RP Williams, IW (reprint author), 790 Sunset Ave 4, Suisun City, CA 94585 USA.
EM iwwilliams16@hotmail.com
NR 11
TC 4
Z9 4
U1 0
U2 2
PU DOWDEN HEALTH MEDIA
PI MONTVALE
PA 110 SUMMIT AVE, MONTVALE, NJ 07645-1712 USA
SN 0094-3509
J9 J FAM PRACTICE
JI J. Fam. Pract.
PD FEB
PY 2011
VL 60
IS 2
BP 66
EP 68
PG 3
WC Primary Health Care; Medicine, General & Internal
SC General & Internal Medicine
GA 811LD
UT WOS:000294210700006
PM 21301640
ER
PT J
AU Pee, EY
Royset, JO
AF Pee, E. Y.
Royset, J. O.
TI On Solving Large-Scale Finite Minimax Problems Using Exponential
Smoothing
SO JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS
LA English
DT Article
DE Finite minimax; Exponential smoothing technique; Rate of convergence;
Run-time complexity
ID SEMI-INFINITE OPTIMIZATION; ENGINEERING DESIGN; SQP ALGORITHM;
COMPLEXITY; CONVERGENCE
AB This paper focuses on finite minimax problems with many functions, and their solution by means of exponential smoothing. We conduct run-time complexity and rate of convergence analysis of smoothing algorithms and compare them with those of SQP algorithms. We find that smoothing algorithms may have only sublinear rate of convergence, but as shown by our complexity results, their slow rate of convergence may be compensated by small computational work per iteration. We present two smoothing algorithms with active-set strategies and novel precision-parameter adjustment schemes. Numerical results indicate that the algorithms are competitive with other algorithms from the literature, and especially so when a large number of functions are nearly active at stationary points.
C1 [Pee, E. Y.; Royset, J. O.] USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
RP Royset, JO (reprint author), USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
EM joroyset@nps.edu
FU AFOSR [F1ATA08337G003]
FX The second author acknowledges support from AFOSR Young Investigator
grant F1ATA08337G003.
NR 36
TC 13
Z9 15
U1 0
U2 4
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-3239
J9 J OPTIMIZ THEORY APP
JI J. Optim. Theory Appl.
PD FEB
PY 2011
VL 148
IS 2
BP 390
EP 421
DI 10.1007/s10957-010-9759-1
PG 32
WC Operations Research & Management Science; Mathematics, Applied
SC Operations Research & Management Science; Mathematics
GA 752FR
UT WOS:000289676800009
ER
PT J
AU Clifton, GT
Sears, AK
Clive, KS
Holmes, JP
Mittendorf, EA
Ioannides, CG
Ponniah, S
Peoples, GE
AF Clifton, Guy T.
Sears, Alan K.
Clive, Kevin S.
Holmes, Jarrod P.
Mittendorf, Elizabeth A.
Ioannides, Constantine G.
Ponniah, Sathibalan
Peoples, George E.
TI Folate receptor alpha A storied past and promising future in
immunotherapy
SO HUMAN VACCINES
LA English
DT Review
DE folate receptor alpha; folate binding protein; immunotherapy
ID MONOCLONAL-ANTIBODY MOV18; CYTOTOXIC T-LYMPHOCYTE; CARCINOMA-ASSOCIATED
ANTIGENS; OVARIAN-CANCER PATIENTS; BINDING-PROTEIN; TUMOR-CELLS;
ANTITUMOR-ACTIVITY; DENDRITIC CELLS; BREAST-CANCER; PHASE-I
AB Folate receptor alpha (FR alpha) is a membrane-bound transport protein with several features which make it an attractive target for cancer immunotherapy. FR alpha is largely shielded from the immune system in normal tissue but exposed while expressed on a variety of malignancies; it is functionally active in cancer pathogenesis; and it is immunogenic. A variety of different immunotherapeutic methods targeting FR alpha are being explored to treat cancer. Passive immunotherapy includes monoclonal antibodies, antibodies modified to deliver treatments and modified T cell therapy. Active immunotherapy has focused on using FR alpha to increase the immunogenicity of cancer or to generate active FR alpha-directed immunity through a range of vaccination techniques. We will review the rationale behind targeting immunotherapy to FR alpha and cover the various techniques designed to do this.
Folate Receptor alpha (FR alpha) is a unique tumor-associated antigen (TAA) with many characteristics that make it an attractive target for immunotherapy in cancer. Many different immunotherapeutic modalities utilizing FR alpha are being explored to treat cancer. The research is in various stages: some are just beyond conception, others have been tried and abandoned, and others still are progressing through human clinical trials. This review will cover immunotherapeutic methods, both active and passive, that target FR alpha.
C1 [Clifton, Guy T.; Sears, Alan K.; Clive, Kevin S.; Peoples, George E.] Brooke Army Med Ctr, Gen Surg Serv, Dept Surg, Ft Sam Houston, TX 78234 USA.
[Holmes, Jarrod P.] USN, Dept Med, Div Hematol & Med Oncol, San Diego Med Ctr, San Diego, CA 92152 USA.
[Ioannides, Constantine G.] UTMD Anderson Canc Ctr, Dept Expt Therapeut, Houston, TX USA.
[Mittendorf, Elizabeth A.] UTMD Anderson Canc Ctr, Dept Surg, Houston, TX USA.
[Ponniah, Sathibalan] Uniformed Serv Univ Hlth Sci, Canc Vaccine Dev Program, US Mil Canc Inst, Bethesda, MD 20814 USA.
RP Peoples, GE (reprint author), Brooke Army Med Ctr, Gen Surg Serv, Dept Surg, Ft Sam Houston, TX 78234 USA.
EM george.peoples@us.army.mil
NR 89
TC 8
Z9 9
U1 1
U2 6
PU LANDES BIOSCIENCE
PI AUSTIN
PA 1806 RIO GRANDE ST, AUSTIN, TX 78702 USA
SN 1554-8600
J9 HUM VACCINES
JI Hum. Vaccines
PD FEB
PY 2011
VL 7
IS 2
BP 183
EP 190
DI 10.4161/hv.7.2.13784
PG 8
WC Biotechnology & Applied Microbiology; Immunology
SC Biotechnology & Applied Microbiology; Immunology
GA 743BQ
UT WOS:000288990900007
PM 21321484
ER
PT J
AU Schlosser, LZ
Lyons, HZ
Talleyrand, RM
Kim, BSK
Johnson, WB
AF Schlosser, Lewis Z.
Lyons, Heather Z.
Talleyrand, Regine M.
Kim, Bryan S. K.
Johnson, W. Brad
TI Advisor-Advisee Relationships in Graduate Training Programs
SO JOURNAL OF CAREER DEVELOPMENT
LA English
DT Article
DE advising relationships; graduate training; mentoring relationships;
multiculturalism; career development
ID NEGATIVE MENTORING EXPERIENCES; CAREER-DEVELOPMENT; QUALITATIVE
EXAMINATION; CLINICAL-PSYCHOLOGY; DOCTORAL PROGRAMS; WORKING-ALLIANCE;
PROFESSIONALS; PRODUCTIVITY; PERSPECTIVES; SUCCESS
AB Advisor-advisee relationships are an important aspect of the career development of professionals in many fields; however, limited scholarship has focused on these relationships. In the three articles of this special section, the authors attempt to help remedy this situation by articulating a culturally infused model of advising relationships in graduate training. This article lays the foundation for the authors' model by reviewing the literature relevant to advising and mentoring. In the subsequent articles, the authors propose that it is critical to understand how within-group cultural variables affect the advising relationship. Articulating a framework for understanding the advising relationship as a multicultural endeavor may help educators prepare the next generations of professionals and facilitate increased empirical attention to this important, yet underexamined construct.
C1 [Schlosser, Lewis Z.] Seton Hall Univ, Dept Profess Psychol & Family Therapy, PhD Program Counseling Psychol, S Orange, NJ 07079 USA.
[Lyons, Heather Z.] Loyola Univ Maryland, Dept Psychol, Practitioner Track Masters Program, Baltimore, MD USA.
[Talleyrand, Regine M.] George Mason Univ, Grad Sch Educ, Coll Educ & Human Dev, Counseling & Dev MED Program, Fairfax, VA 22030 USA.
[Talleyrand, Regine M.] George Mason Univ, Grad Sch Educ, Coll Educ & Human Dev, PhD Program, Fairfax, VA 22030 USA.
[Kim, Bryan S. K.] Univ Hawaii, Dept Psychol, MA Program Counseling Psychol, Hilo, HI 96720 USA.
[Johnson, W. Brad] USN Acad, Dept Leadership Eth & Law, Annapolis, MD 21402 USA.
RP Schlosser, LZ (reprint author), Seton Hall Univ, Dept Profess Psychol & Family Therapy, PhD Program Counseling Psychol, 400 S Orange Ave, S Orange, NJ 07079 USA.
EM schlosle@shu.edu
RI George, Sarah/D-4782-2012
NR 42
TC 8
Z9 8
U1 2
U2 12
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0894-8453
J9 J CAREER DEV
JI J. Career Dev.
PD FEB
PY 2011
VL 38
IS 1
BP 3
EP 18
DI 10.1177/0894845309358887
PG 16
WC Psychology, Applied
SC Psychology
GA 731SP
UT WOS:000288129900001
ER
PT J
AU Schlosser, LZ
Talleyrand, RM
Lyons, HZ
Kim, BSK
Johnson, WB
AF Schlosser, Lewis Z.
Talleyrand, Regine M.
Lyons, Heather Z.
Kim, Bryan S. K.
Johnson, W. Brad
TI Multicultural Issues in Graduate Advising Relationships
SO JOURNAL OF CAREER DEVELOPMENT
LA English
DT Article
DE advising relationships; graduate training; mentoring relationships;
multiculturalism; career development
ID FACULTY ROLE-MODEL; MENTORING RELATIONSHIPS; PROFESSIONAL PSYCHOLOGY;
COUNSELING PSYCHOLOGY; WORKING-ALLIANCE; RACIAL IDENTITY; DEVELOPMENTAL
RELATIONSHIPS; ORGANIZATIONAL DEMOGRAPHY; QUALITATIVE EXAMINATION;
PERCEIVED SIMILARITY
AB Although advisor-advisee relationships are ubiquitous to graduate training, there is relatively little scholarship bearing on advising relationships. Not surprisingly, the intersection between multiculturalism and advising relationships is also sparse. Given the potential increase in the numbers of People of Color entering graduate training due to the changing demographics in the United States and the influence of advising relationships on advisees' personal and professional development, it is imperative to address the role of culture in the advising relationship-in this article, we will address race, sex, and sexual orientation. Hence, in this article, we address the potential impact of racial and cultural socialization processes on the advising relationship and organizational contexts.
C1 [Schlosser, Lewis Z.] Seton Hall Univ, Dept Profess Psychol & Family Therapy, PhD Program Counseling Psychol, S Orange, NJ 07079 USA.
[Talleyrand, Regine M.] George Mason Univ, Coll Educ & Human Dev, Counseling & Dev MED Program, Fairfax, VA 22030 USA.
[Talleyrand, Regine M.] George Mason Univ, Coll Educ & Human Dev, PhD Program, Fairfax, VA 22030 USA.
[Lyons, Heather Z.] Loyola Univ Maryland, Dept Psychol, Practitioner Track Masters Program, Baltimore, MD USA.
[Kim, Bryan S. K.] Univ Hawaii, Dept Psychol, MA Program Counseling Psychol, Hilo, HI 96720 USA.
[Johnson, W. Brad] USN Acad, Dept Leadership Eth & Law, Annapolis, MD 21402 USA.
RP Schlosser, LZ (reprint author), Seton Hall Univ, Dept Profess Psychol & Family Therapy, PhD Program Counseling Psychol, 400 S Orange Ave, S Orange, NJ 07079 USA.
EM lewis.schlosser@shu.edu
NR 89
TC 7
Z9 7
U1 1
U2 11
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0894-8453
J9 J CAREER DEV
JI J. Career Dev.
PD FEB
PY 2011
VL 38
IS 1
BP 19
EP 43
DI 10.1177/0894845309359285
PG 25
WC Psychology, Applied
SC Psychology
GA 731SP
UT WOS:000288129900002
ER
PT J
AU Schlosser, LZ
Lyons, HZ
Talleyrand, RM
Kim, BSK
Johnson, WB
AF Schlosser, Lewis Z.
Lyons, Heather Z.
Talleyrand, Regine M.
Kim, Bryan S. K.
Johnson, W. Brad
TI A Multiculturally Infused Model of Graduate Advising Relationships
SO JOURNAL OF CAREER DEVELOPMENT
LA English
DT Article
DE advising relationships; graduate training; mentoring relationships;
multiculturalism; career development
ID DEVELOPMENTAL RELATIONSHIPS; QUALITATIVE EXAMINATION; MENTORING
RELATIONSHIPS; PSYCHOLOGY PROGRAMS; WORKING-ALLIANCE; PERSPECTIVE;
COMPETENCE; GUIDELINES; EDUCATION; STUDENTS
AB In this final article of the special section, the authors offer their beginning theoretical model of graduate advising relationships. The authors' framework characterizes the advising relationship as a multicultural endeavor. The authors offer eight theoretical propositions with the intent to articulate aspects of good advising and those variables that appear to be related to successful advising relationships. As part of this model, the authors attend to both the process and the outcome of advising relationships. The authors close with implications for research, training, and practice, and offer suggestions for future research.
C1 [Schlosser, Lewis Z.] Seton Hall Univ, Dept Profess Psychol & Family Therapy, PhD Program Counseling Psychol, S Orange, NJ 07079 USA.
[Lyons, Heather Z.] Loyola Univ Maryland, Dept Psychol, Practitioner Track Masters Program, Baltimore, MD USA.
[Talleyrand, Regine M.] George Mason Univ, Coll Educ & Human Dev, Counseling & Dev MED Program, Fairfax, VA 22030 USA.
[Talleyrand, Regine M.] George Mason Univ, Coll Educ & Human Dev, PhD Program, Fairfax, VA 22030 USA.
[Kim, Bryan S. K.] Univ Hawaii, Dept Psychol, MA Program Counseling Psychol, Hilo, HI 96720 USA.
[Johnson, W. Brad] USN Acad, Dept Leadership Eth & Law, Annapolis, MD 21402 USA.
RP Schlosser, LZ (reprint author), Seton Hall Univ, Dept Profess Psychol & Family Therapy, PhD Program Counseling Psychol, S Orange, NJ 07079 USA.
EM lewis.schlosser@shu.edu
NR 44
TC 6
Z9 6
U1 0
U2 12
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0894-8453
J9 J CAREER DEV
JI J. Career Dev.
PD FEB
PY 2011
VL 38
IS 1
BP 44
EP 61
DI 10.1177/0894845309359286
PG 18
WC Psychology, Applied
SC Psychology
GA 731SP
UT WOS:000288129900003
ER
PT J
AU Hattendorf, JB
AF Hattendorf, John B.
TI The United States Navy in the Twenty-first Century: Thoughts on naval
theory, strategic constraints and opportunities
SO MARINERS MIRROR
LA English
DT Article
C1 [Hattendorf, John B.] USN, War Coll, Newport, RI 02841 USA.
[Hattendorf, John B.] Maritime Hist Dept, Kingston Upon Hull, N Humberside, England.
[Hattendorf, John B.] Naval War Coll Museum, Newport, RI USA.
[Hattendorf, John B.] Univ Oxford, Pembroke Coll, Oxford OX1 2JD, England.
RP Hattendorf, JB (reprint author), USN, War Coll, Newport, RI 02841 USA.
NR 25
TC 1
Z9 1
U1 0
U2 0
PU SOC NAUTICAL RESEARCH
PI LONDON
PA NATIONAL MARITIME MUSEUM GREENWICH, LONDON SE10 9NF, ENGLAND
SN 0025-3359
J9 MARINERS MIRROR
JI Mar. Mirror
PD FEB
PY 2011
VL 97
IS 1
BP 285
EP 297
PG 13
WC History
SC History
GA 730AQ
UT WOS:000287996200021
ER
PT J
AU Mclay, JG
AF Mclay, Justin G.
TI Diagnosing the Relative Impact of "Sneaks," "Phantoms," and Volatility
in Sequences of Lagged Ensemble Probability Forecasts with a Simple
Dynamic Decision Model
SO MONTHLY WEATHER REVIEW
LA English
DT Article
ID LOSS RATIO SITUATION; PREDICTIONS
AB Monte Carlo simulation of sequences of lagged ensemble probability forecasts is undertaken using Markov transition law estimated from a reforecast ensemble. A simple three-state, three-action dynamic decision model is then applied to the Monte Carlo sequence realizations using a basket of cost functions, and the resulting expense incurred by the decision model is conditioned upon the structure of the sequence realizations. Findings show that the greatest average expense is incurred by "sneak" and "volatile" sequence structures, which are structures characterized by large and rapid increases in event probability at short lag times. These findings are simple quantitative illustration of the adage that large run-to-run variability of forecasts can be troublesome to a decision maker. The experiments also demonstrate how even small improvements in the amount of advance warning of an event can translate into a substantial reduction in decision expense. In general, the conditioned decision expense is found to be sensitive to sequence structure for a given cost function, to the parameters of a given cost function, and to the choice of cost function itself.
C1 USN, Res Lab, Monterey, CA 93943 USA.
RP Mclay, JG (reprint author), USN, Res Lab, 7 Grace Hopper Ave, Monterey, CA 93943 USA.
EM justin.mclay@nrlmry.navy.mil
FU Naval Research Laboratory; Office of Naval Research [0601153N,
BE-033-03-04M]
FX This research was sponsored by the Naval Research Laboratory and the
Office of Naval Research under Program Element 0601153N and Project
BE-033-03-04M. The author thanks Drs. Gregory Postel, Jonathan Martin,
and Michael Morgan of the University of Wisconsin for bringing the
problem of sneak and phantom forecast events to his attention.
NR 30
TC 1
Z9 1
U1 0
U2 2
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0027-0644
EI 1520-0493
J9 MON WEATHER REV
JI Mon. Weather Rev.
PD FEB
PY 2011
VL 139
IS 2
BP 387
EP 402
DI 10.1175/2010MWR3449.1
PG 16
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 739PE
UT WOS:000288729300005
ER
PT J
AU Bishop, CH
Hodyss, D
Steinle, P
Sims, H
Clayton, AM
Lorenc, AC
Barker, DM
Buehner, M
AF Bishop, Craig H.
Hodyss, Daniel
Steinle, Peter
Sims, Holly
Clayton, Adam M.
Lorenc, Andrew C.
Barker, Dale M.
Buehner, Mark
TI Efficient Ensemble Covariance Localization in Variational Data
Assimilation
SO MONTHLY WEATHER REVIEW
LA English
DT Article
ID TRANSFORM KALMAN FILTER; SYSTEM; INTERPOLATION; NWP
AB Previous descriptions of how localized ensemble covariances can be incorporated into variational (VAR) data assimilation (DA) schemes provide few clues as to how this might be done in an efficient way. This article serves to remedy this hiatus in the literature by deriving a computationally efficient algorithm for using nonadaptively localized four-dimensional (4D) or three-dimensional (3D) ensemble covariances in variational DA. The algorithm provides computational advantages whenever (i) the localization function is a separable product of a function of the horizontal coordinate and a function of the vertical coordinate, (ii) and/or the localization length scale is much larger than the model grid spacing, (iii) and/or there are many variable types associated with each grid point, (iv) and/or 4D ensemble covariances are employed.
C1 [Bishop, Craig H.] USN, Res Lab, Marine Meteorol Div, Monterey, CA 93943 USA.
[Steinle, Peter; Sims, Holly] Bur Meteorol, Melbourne, Vic, Australia.
[Clayton, Adam M.; Lorenc, Andrew C.; Barker, Dale M.] Met Off, Exeter, Devon, England.
[Buehner, Mark] Environm Canada, Meteorol Res Div, Dorval, PQ, Canada.
RP Bishop, CH (reprint author), USN, Res Lab, Marine Meteorol Div, 7 Grace Hopper Ave,Stop 2,Bldg 702,Room 212, Monterey, CA 93943 USA.
EM bishop@nrlmry.navy.mil
FU ONR [0602435N, BE-435-003, N0001407WX30012]
FX The authors wish to acknowledge the contributions of Ricardo Todling
whose comments, as a reviewer, significantly improved the paper. Among
other things, Ricardo improved the conciseness of the proof of the
square root theorem. The authors also acknowledge the helpful criticism
of the Editor, Herschel Mitchell, and the insightful suggestions of an
anonymous reviewer. CHB expresses his gratitude to the "Centre for
Australia Weather and Climate RESEARCH-a collaboration between the
Bureau of Meteorology and CSIRO" for their support of a visit to the
Centre during which this paper was conceived. CHB and DH gratefully
acknowledge financial support from ONR Project Element 0602435N, Project
BE-435-003, and ONR Grant N0001407WX30012.
NR 17
TC 19
Z9 19
U1 0
U2 9
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0027-0644
J9 MON WEATHER REV
JI Mon. Weather Rev.
PD FEB
PY 2011
VL 139
IS 2
BP 573
EP 580
DI 10.1175/2010MWR3405.1
PG 8
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 739PE
UT WOS:000288729300016
ER
PT J
AU Snyder, A
Pu, ZX
Reynolds, CA
AF Snyder, Andrew
Pu, Zhaoxia
Reynolds, Carolyn A.
TI Impact of Stochastic Convection on Ensemble Forecasts of Tropical
Cyclone Development
SO MONTHLY WEATHER REVIEW
LA English
DT Article
ID ATMOSPHERIC PREDICTION SYSTEM; TRANSFORM; NCEP; SCHEME
AB Two versions of the Navy Operational Global Atmospheric Prediction System (NOGAPS) global ensemble, with and without a stochastic convection scheme, are compared regarding their performance in predicting the development and evolution of tropical cyclones. Forecasts of four typhoons, one tropical storm, and two selected nondeveloping tropical systems from The Observing System Research and Predictability Experiment (THORPEX) Pacific Asian Regional Campaign and Tropical Cyclone Structure 2008 (T-PARC/TCS-08) field program during August and September 2008 are evaluated. It is found that stochastic convection substantially increases the spread in ensemble storm tracks and in the vorticity and height fields in the vicinity of the storm. Stochastic convection also has an impact on the number of ensemble members predicting genesis. One day prior to the system being declared a tropical depression, on average, 31% of the ensemble members predict storm development when the ensemble includes initial perturbations only. When stochastic convection is included, this percentage increases to 50%, but the number of "false alarms" for two nondeveloping systems also increases. However, the increase in false alarms is smaller than the increase in correct development predictions, indicating that stochastic convection may have the potential for improving tropical cyclone forecasting.
C1 [Snyder, Andrew; Pu, Zhaoxia] Univ Utah, Dept Atmospher Sci, Salt Lake City, UT 84112 USA.
[Reynolds, Carolyn A.] USN, Res Lab, Monterey, CA USA.
RP Pu, ZX (reprint author), Univ Utah, Dept Atmospher Sci, 135 S 1460 E,Rm 819, Salt Lake City, UT 84112 USA.
EM zhaoxia.pu@utah.edu
OI Reynolds, Carolyn/0000-0003-4690-4171
FU Office of Naval Research (ONR) [N00014-08-1-0308, 0601153N]; Department
of Defense
FX This study is supported by the Office of Naval Research (ONR) Grant
N00014-08-1-0308. The third author (CR) gratefully acknowledges support
from ONR 0601153N and the Department of Defense High-performance
Computing Challenge program, which provided access to real-time
computational resources.
NR 11
TC 5
Z9 6
U1 0
U2 1
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0027-0644
J9 MON WEATHER REV
JI Mon. Weather Rev.
PD FEB
PY 2011
VL 139
IS 2
BP 620
EP 626
DI 10.1175/2010MWR3341.1
PG 7
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 739PE
UT WOS:000288729300019
ER
PT J
AU Johnson, WB
Johnson, SJ
Sullivan, GR
Bongar, B
Miller, L
Sammons, MT
AF Johnson, W. Brad
Johnson, Shannon J.
Sullivan, Glenn R.
Bongar, Bruce
Miller, Laurence
Sammons, Morgan T.
TI Psychology in Extremis: Preventing Problems of Professional Competence
in Dangerous Practice Settings
SO PROFESSIONAL PSYCHOLOGY-RESEARCH AND PRACTICE
LA English
DT Article
DE competence; ethics; psychologist; professional; in extremis
ID SELF-CARE; ETHICAL CONSIDERATIONS; NATIONAL SURVEY; IMPAIRMENT;
DISTRESS; PSYCHOTHERAPY; THERAPISTS; BELIEFS; EMPATHY
AB When a psychologist provides services in a dangerous context a work setting defined by persistent threat to the psychologist's own personal safety and well-being the psychologist is said to practice in extremis. Psychologists who routinely function in extremis, such as those in correctional, disaster response, military, and police psychology among other specialties-may be at increased risk for troubling experiences such as direct or vicarious traumatization, compassion fatigue, and empathy failure. Over time, in extremis experiences may contribute to decrements in professional competence. When psychologists become aware of personal problems that interfere with their work, they must take steps to ameliorate the problem while protecting consumers. In this Focus on Ethics, we discuss the difficulty inherent in self-identifying and correcting problems of professional competence when working in a high-threat environment. Three expert commentaries further elucidate in extremis competency concerns from the perspective of disaster response, police, and military psychology. The authors provide numerous recommendations for helping psychologists to ensure ongoing competence in in extremis jobs.
C1 [Johnson, W. Brad] USN Acad, Dept Leadership Eth & Law, Annapolis, MD 21402 USA.
[Johnson, Shannon J.] USN Hosp, Camp Pendleton, CA USA.
[Sullivan, Glenn R.] Virginia Mil Inst, Dept Psychol & Philosophy, Lexington, VA USA.
[Bongar, Bruce] Palo Alto Univ, Pacific Grad Sch Psychol, Palo Alto, CA USA.
[Bongar, Bruce] Stanford Univ, Sch Med, Dept Psychiat & Behav Sci, Stanford, CA 94305 USA.
[Sammons, Morgan T.] Alliant Int Univ, Calif Sch Profess Psychol, San Diego, CA USA.
RP Johnson, WB (reprint author), USN Acad, Dept Leadership Eth & Law, Luce Hall,7B, Annapolis, MD 21402 USA.
EM johnsonb@usna.edu
NR 28
TC 5
Z9 5
U1 3
U2 16
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 0735-7028
EI 1939-1323
J9 PROF PSYCHOL-RES PR
JI Prof. Psychol.-Res. Pract.
PD FEB
PY 2011
VL 42
IS 1
SI SI
BP 94
EP 98
DI 10.1037/a0022365
PG 5
WC Psychology, Multidisciplinary
SC Psychology
GA 733TE
UT WOS:000288285100013
ER
PT J
AU Waibel, J
Davis, S
Graber, E
Uebelhoer, N
AF Waibel, Jill
Davis, Stephen
Graber, Emmy
Uebelhoer, Nathan
TI TREATMENT OF SCARS USING LASER AND LASER ASSISTED CORTICOSTEROID
DELIVERY
SO LASERS IN SURGERY AND MEDICINE
LA English
DT Meeting Abstract
C1 Univ Miami, Miller Sch Med, Miami Dermatol & Laser Inst, Miami, FL 33136 USA.
Boston Univ, Sch Med, Boston, MA 02118 USA.
Boston Med Ctr, Boston, MA USA.
USN, San Diego Med Ctr, San Diego, CA 92152 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0196-8092
J9 LASER SURG MED
JI Lasers Surg. Med.
PD FEB
PY 2011
VL 43
SU 23
MA 57
BP 924
EP 924
PG 1
WC Dermatology; Surgery
SC Dermatology; Surgery
GA 735EK
UT WOS:000288396000053
ER
PT J
AU Reeder, DB
Bryan, CL
Everett, KR
Batteen, ML
Guest, AA
AF Reeder, D. B.
Bryan, C. L.
Everett, K. R.
Batteen, M. L.
Guest, A. A.
TI Quantitative ocean characterisation: Acoustically analogous environments
SO JOURNAL OF OPERATIONAL OCEANOGRAPHY
LA English
DT Article
AB Characterisation of the oceanic environment is of interest to many different scientific and engineering disciplines, including geologists, fisheries managers, marine mammal biologists, ocean resource managers, conservationists and ocean acousticians. Quantitative environmental characterisation requires a robust and efficient methodology to evaluate vast amounts of spatiotemporal environmental data. Presented here is such a methodology - flexible and robust enough to be used in multiple applications. The case presented is the determination of acoustically analogous environments in the ocean. A key element of this work is the construction of a set of acoustically relevant parameters which characterise acoustical properties of the water column, based on the sound speed profile. Results of this methodology demonstrate that this set of acoustically significant parameters accurately represent the acoustic propagation characteristics of the ocean environment.
C1 [Reeder, D. B.; Bryan, C. L.; Everett, K. R.; Batteen, M. L.; Guest, A. A.] USN, Postgrad Sch, Dept Oceanog, Monterey, CA USA.
RP Reeder, DB (reprint author), USN, Postgrad Sch, Dept Oceanog, Monterey, CA USA.
NR 13
TC 0
Z9 0
U1 1
U2 4
PU INST MARINE ENGINEERING, SCI & TECHNOL
PI LONDON
PA 80 COLEMAN ST, LONDON EC2R 5BJ, ENGLAND
SN 1755-876X
J9 J OPER OCEANOGR
JI J. Oper. Oceanogr.
PD FEB
PY 2011
VL 4
IS 1
BP 3
EP 12
PG 10
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 736GS
UT WOS:000288479600002
ER
PT J
AU Galanis, G
Chu, PC
Kallos, G
AF Galanis, G.
Chu, P. C.
Kallos, G.
TI Statistical post processes for the improvement of the results of
numerical wave prediction models. A combination of Kolmogorov-Zurbenko
and Kalman filters
SO JOURNAL OF OPERATIONAL OCEANOGRAPHY
LA English
DT Article
ID TEMPERATURE; FORECASTS; SCALES
AB A new mathematical technique for adaptation of the results of numerical wave prediction models to local conditions is proposed. The main aim is to reduce the systematic part of the prediction error in the direct model outputs by taking advantage of the availability of local measurements in the area of interest. The methodology is based on a combination of two different statistical tools: Kolmogorov-Zurbenko (KZ) and Kalman filters. The first smoothes the observation time series as well as that of model direct outputs in order to be comparable via a Kalman filter. This is not the case in general, since forecasted values are smoothed spatially and temporarily by the model itself while observations are point records where no smoothing procedure is applied. The direct application of a Kalman filter to such qualitatively different series may lead to serious instabilities of the method and discontinuities in the results. The proper utilisation of KZ-filters turn the two series into a compatible mode and, therefore, makes possible the exploitation of Kalman filters for the identification and subtraction of systematic errors. The proposed method was tested in an open sea area for significant wave height forecasts using the wave model WAM and six buoys as observational stations.
C1 [Galanis, G.] Hellen Naval Acad, Sect Math, Xatzikyriakion, Piraeus, Greece.
[Galanis, G.; Kallos, G.] Univ Athens, Sch Phys, Div Appl Phys, Atmospher Modeling & Weather Forecasting Grp, Athens, Greece.
[Chu, P. C.] USN, Postgrad Sch, Dept Oceanog, Grad Sch Engn, Monterey, CA USA.
RP Galanis, G (reprint author), Hellen Naval Acad, Sect Math, Xatzikyriakion, Piraeus, Greece.
NR 20
TC 9
Z9 9
U1 1
U2 4
PU INST MARINE ENGINEERING, SCI & TECHNOL
PI LONDON
PA 80 COLEMAN ST, LONDON EC2R 5BJ, ENGLAND
SN 1755-876X
J9 J OPER OCEANOGR
JI J. Oper. Oceanogr.
PD FEB
PY 2011
VL 4
IS 1
BP 23
EP 31
PG 9
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 736GS
UT WOS:000288479600004
ER
PT J
AU Benavides, LC
Sears, AK
Gates, JD
Clifton, GT
Clive, KS
Carmichael, MG
Holmes, JP
Mittendorf, EA
Ponniah, S
Peoples, GE
AF Benavides, Linda C.
Sears, Alan K.
Gates, Jeremy D.
Clifton, Guy T.
Clive, Kevin S.
Carmichael, Mark G.
Holmes, Jarrod P.
Mittendorf, Elizabeth A.
Ponniah, Sathibalan
Peoples, George E.
TI Comparison of different HER2/neu vaccines in adjuvant breast cancer
trials: implications for dosing of peptide vaccines
SO EXPERT REVIEW OF VACCINES
LA English
DT Review
DE AE37 peptide; dose reduction; E75 peptide; GM-CSF; GP2 peptide; HER2/neu
peptide vaccine
ID GROUP-STUDY I-01; T-CELL IMMUNITY; I CLINICAL-TRIAL; E75 VACCINE;
PROSTATE-CANCER; INVARIANT CHAIN; RECURRENCE; RESPONSES; EPITOPE;
IMMUNIZATION
AB We have performed multiple adjuvant clinical trials using immunogenic peptides from the HER2/neu protein (AE37/E75/GP2) plus (GM-CSF) given intradermally to breast cancer patients. Four trials were performed with similar dose-escalation design with increasing doses of peptide (AE37/E75/GP2) and varying amounts of GM-CSF. Dose reductions (DRs) were made for significant local and/or systemic toxicity by decreasing GM-CSF for subsequent inoculations. Ex vivo and in vivo immunologic responses were used to compare groups. Of 132 patients, 39 required DR (30 for robust local reactions [DR-L]). DR patients, particularly DR-L, had greater immune responses both ex vivo and in vivo. Postvaccine delayed-type hypersensitivity in DR-L patients compared with all others was larger for E75 (p = 0.001), AE37 (p = 0.077) and GP2 (p = 0.076). All three peptide vaccines were safe and well-tolerated. These findings have led to a clinically relevant optimal vaccine dosing strategy, which may be applicable to other peptide-based cancer vaccines.
C1 [Benavides, Linda C.; Sears, Alan K.; Gates, Jeremy D.; Clifton, Guy T.; Clive, Kevin S.; Peoples, George E.] Brooke Army Med Ctr, Gen Surg Serv, Dept Surg, Houston, TX 78234 USA.
[Carmichael, Mark G.; Ponniah, Sathibalan] Uniformed Serv Univ Hlth Sci, Dept Surg, United States Mil Canc Inst, Canc Vaccine Dev Program, Bethesda, MD 20814 USA.
[Holmes, Jarrod P.] USN, San Diego Med Ctr, Dept Hematol & Med Oncol, San Diego, CA 92134 USA.
[Mittendorf, Elizabeth A.] Univ Texas MD Anderson Canc Ctr, Dept Surg Oncol, Houston, TX 77230 USA.
RP Peoples, GE (reprint author), Brooke Army Med Ctr, Gen Surg Serv, Dept Surg, 3851 Roger Brooke Dr, Houston, TX 78234 USA.
EM george.peoples@us.army.mil
FU United States Military Cancer Institute; Department of Surgery;
Uniformed Services University of the Health Sciences; Department of
Clinical Investigation, Walter Reed Army Medical Center, Washington DC,
USA; Antigen Express, Inc., Worchester, MA, USA [I-01, I-02, I-03]
FX Supported by the United States Military Cancer Institute, Department of
Surgery, Uniformed Services University of the Health Sciences, and the
Department of Clinical Investigation, Walter Reed Army Medical Center,
Washington DC, USA. Study I-01 and I-02 are primarily funded by the
Clinical Breast Care Project. Study I-03 is funded by Antigen Express,
Inc., Worchester, MA, USA. This work represents original research that
has not been submitted elsewhere for publication. George E Peoples has
partial inventor rights to all three vaccines which have been licensed
for commercial development based on these results. George E Peoples is
entitled to financial proceeds associated with these licenses per
Federal policy and may assist these companies in the development of the
vaccines. The authors have no other relevant affiliations or financial
involvement with any organization or entity with a financial interest in
or financial conflict with the subject matter or materials discussed in
the manuscript apart from those disclosed.
NR 31
TC 12
Z9 16
U1 1
U2 8
PU EXPERT REVIEWS
PI LONDON
PA UNITEC HOUSE, 3RD FL, 2 ALBERT PLACE, FINCHLEY CENTRAL, LONDON N3 1QB,
ENGLAND
SN 1476-0584
J9 EXPERT REV VACCINES
JI Expert Rev. Vaccines
PD FEB
PY 2011
VL 10
IS 2
BP 201
EP 210
DI 10.1586/ERV.10.167
PG 10
WC Immunology
SC Immunology
GA 732NM
UT WOS:000288192200012
PM 21332269
ER
PT J
AU Trejo, M
Jessen, GH
Chabak, KD
Gillespie, JK
Crespo, A
Kossler, M
Trimble, V
Langley, D
Heller, ER
Claflin, B
Walker, DE
Poling, B
Gilbert, R
Via, GD
Hoelscher, J
Roussos, J
Ejeckam, F
Zimmer, J
AF Trejo, Manuel
Jessen, Gregg H.
Chabak, Kelson D.
Gillespie, James K.
Crespo, Antonio
Kossler, Mauricio
Trimble, Virginia
Langley, Derrick
Heller, Eric R.
Claflin, Bruce
Walker, Dennis E.
Poling, Brian
Gilbert, Ryan
Via, Glen D.
Hoelscher, John
Roussos, Jason
Ejeckam, Felix
Zimmer, Jerry
TI Progress towards III-nitrides HEMTs on free-standing diamond substrates
for thermal management
SO PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
LA English
DT Article
DE CVD; diamond; gallium nitride; high electron mobility transistor;
thermal
AB In this paper, we discuss the progress in the application of silicon-on-diamond (SOD) and chemically vapour deposited (CVD) diamond wafers as an alternative solution to silicon and silicon carbide (SiC) substrates to enhance heat dissipation away from the active region of AlGaN/GaN high electron mobility transistors (HEMT) while decreasing thermal degradation due to thermal effects. The superior thermal conductivity and insulating properties of polycrystalline diamond (815 Wcm/K) free-standing wafers have demonstrated certain advantages, mostly evident in the device performance and reliability. Two unique diamond growth applications engineered by sp(3) Diamond Technologies Inc., and Group4 Labs Inc., are discussed and device performance data is presented from early attempts to our most current device research efforts. As single-crystalline diamond wafers (similar to 20 Wcm/K) become more accessible and affordable, it is expected to see significant improvement over the current state of this technology.
[GRAPHICS]
C1 [Trejo, Manuel; Jessen, Gregg H.; Chabak, Kelson D.; Gillespie, James K.; Crespo, Antonio; Kossler, Mauricio; Trimble, Virginia; Langley, Derrick; Heller, Eric R.; Claflin, Bruce; Walker, Dennis E.; Poling, Brian; Gilbert, Ryan; Via, Glen D.; Hoelscher, John] USAF, Res Lab, Wright Patterson AFB, OH 45431 USA.
[Roussos, Jason] USN, Res Lab, Washington, DC 20357 USA.
[Ejeckam, Felix] Grp4 Labs Inc, Fremont, CA 94539 USA.
[Zimmer, Jerry] Sp3 Diamond Technol Inc, Santa Clara, CA 95050 USA.
RP Trejo, M (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45431 USA.
EM manuel.trejo@wpafb.af.mil; gregg.jessen@aoard.af.mil
NR 8
TC 2
Z9 2
U1 0
U2 20
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1862-6300
J9 PHYS STATUS SOLIDI A
JI Phys. Status Solidi A-Appl. Mat.
PD FEB
PY 2011
VL 208
IS 2
BP 439
EP 444
DI 10.1002/pssa.201000601
PG 6
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
Condensed Matter
SC Materials Science; Physics
GA 731DS
UT WOS:000288087100019
ER
PT J
AU Pisacane, VL
Dolecek, QE
Malak, H
Cucinotta, FA
Zaider, M
Rosenfeld, AB
Rusek, A
Sivertz, M
Dicello, JF
AF Pisacane, V. L.
Dolecek, Q. E.
Malak, H.
Cucinotta, F. A.
Zaider, M.
Rosenfeld, A. B.
Rusek, A.
Sivertz, M.
Dicello, J. F.
TI MICRODOSEMETER INSTRUMENT (MIDN) FOR ASSESSING RISK IN SPACE
SO RADIATION PROTECTION DOSIMETRY
LA English
DT Article; Proceedings Paper
CT 15th International Symposium on Microdosimetry
CY OCT 25-30, 2009
CL Verona, ITALY
SP INFN Lab Nazl Legnaro, NASA Johnson Space Ctr, CERN, Univ Oxford, Gray Inst Radiat Oncol & Biol
AB Radiation in space generally produces higher dose rates than that on the Earth's surface, and contributions from primary galactic and solar events increase with altitude within the magnetosphere. Presently, no personnel monitor is available to astronauts for real-time monitoring of dose, radiation quality and regulatory risk. This group is developing a prototypic instrument for use in an unknown, time-varying radiation field. This microdosemeter-dosemeter nucleon instrument is for use in a spacesuit, spacecraft, remote rover and other applications. It provides absorbed dose, dose rate and dose equivalent in real time so that action can be taken to reduce exposure. Such a system has applications in health physics, anti-terrorism and radiation-hardening of electronics as well. The space system is described and results of ground-based studies are presented and compared with predictions of transport codes. An early prototype in 2007 was successfully launched, the only solid-state microdosemeter to have flown in space.
C1 [Pisacane, V. L.; Dicello, J. F.] USN Acad, Aerosp Engn Dept Mail Stop 11B, Annapolis, MD 21402 USA.
[Dolecek, Q. E.] QED Associates, Georgetown, DE 19947 USA.
[Malak, H.] Amer Environm Syst Inc, Ellicott City, MD 21043 USA.
[Cucinotta, F. A.] NASA, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA.
[Zaider, M.] Mem Sloan Kettering Canc Ctr, New York, NY 10021 USA.
[Rosenfeld, A. B.] Univ Wollongong, Ctr Med Radiat Phys, Wollongong, NSW 2522, Australia.
[Rusek, A.; Sivertz, M.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Pisacane, VL (reprint author), USN Acad, Aerosp Engn Dept Mail Stop 11B, 590 Holloway Rd, Annapolis, MD 21402 USA.
EM pisacane@usna.edu
RI Rosenfeld, Anatoly/D-1989-2014;
OI Zaider, Marco/0000-0002-5113-7862
NR 4
TC 2
Z9 2
U1 0
U2 3
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0144-8420
J9 RADIAT PROT DOSIM
JI Radiat. Prot. Dosim.
PD FEB
PY 2011
VL 143
IS 2-4
BP 398
EP 401
DI 10.1093/rpd/ncq525
PG 4
WC Environmental Sciences; Public, Environmental & Occupational Health;
Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical
Imaging
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
GA 730GR
UT WOS:000288022300053
PM 21199825
ER
PT J
AU Dicello, JF
Gersey, BB
Gridley, DS
Coutrakon, GB
Lesyna, D
Pisacane, VL
Robertson, JB
Schulte, RW
Slater, JD
Wroe, AJ
Slater, JM
AF Dicello, John F.
Gersey, Bradford B.
Gridley, Daila S.
Coutrakon, George B.
Lesyna, David
Pisacane, Vincent L.
Robertson, James B.
Schulte, Reinhard W.
Slater, Jerry D.
Wroe, Andrew J.
Slater, James M.
TI MICRODOSIMETRIC COMPARISON OF SCANNED AND CONVENTIONAL PROTON BEAMS USED
IN RADIATION THERAPY
SO RADIATION PROTECTION DOSIMETRY
LA English
DT Article; Proceedings Paper
CT 15th International Symposium on Microdosimetry
CY OCT 25-30, 2009
CL Verona, ITALY
SP INFN Lab Nazl Legnaro, NASA Johnson Space Ctr, CERN, Univ Oxford, Gray Inst Radiat Oncol & Biol
ID BIOL-PHYS 2006/65/1-7; PROSTATE-CANCER; 2ND CANCERS; FIELD;
RADIOTHERAPY; IMPACT; RISK
AB Multiple groups have hypothesised that the use of scanning beams in proton therapy will reduce the neutron component of secondary radiation in comparison with conventional methods with a corresponding reduction in risks of radiation-induced cancers. Loma Linda University Medical Center (LLUMC) has had FDA marketing clearance for scanning beams since 1988 and an experimental scanning beam has been available at the LLUMC proton facility since 2001. The facility has a dedicated research room with a scanning beam and fast switching that allows its use during patient treatments. Dosimetric measurements and microdosimetric distributions for a scanned beam are presented and compared with beams produced with the conventional methods presently used in proton therapy.
C1 [Dicello, John F.] Loma Linda Univ, Med Ctr, Dept Radiat Med, Lutherville Timonium, MD 21093 USA.
[Gersey, Bradford B.] Prairie View A&M Univ, Ctr Appl Radiat Res, NASA, Prairie View, TX 77446 USA.
[Gridley, Daila S.; Coutrakon, George B.; Schulte, Reinhard W.; Slater, Jerry D.; Wroe, Andrew J.; Slater, James M.] Loma Linda Univ, Med Ctr, Dept Radiat Med, Loma Linda, CA 92354 USA.
[Lesyna, David] Optivus Proton Therapy Inc, Loma Linda, CA 92354 USA.
[Pisacane, Vincent L.] USN Acad, Aerosp Engn Dept Mail Stop 11B, Annapolis, MD 21402 USA.
[Robertson, James B.] E Carolina Univ, Chocowinity, NC 27817 USA.
RP Dicello, JF (reprint author), Loma Linda Univ, Med Ctr, Dept Radiat Med, 25 Westminster Bridge Way, Lutherville Timonium, MD 21093 USA.
EM dicello@usna.edu
RI Gridley, Daila/P-7711-2015
NR 17
TC 5
Z9 5
U1 0
U2 5
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0144-8420
J9 RADIAT PROT DOSIM
JI Radiat. Prot. Dosim.
PD FEB
PY 2011
VL 143
IS 2-4
BP 513
EP 518
DI 10.1093/rpd/ncq513
PG 6
WC Environmental Sciences; Public, Environmental & Occupational Health;
Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical
Imaging
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
GA 730GR
UT WOS:000288022300075
PM 21362697
ER
PT J
AU Ryan, MAK
Jacobson, IG
Sevick, CJ
Smith, TC
Gumbs, GR
Conlin, AMS
AF Ryan, Margaret A. K.
Jacobson, Isabel G.
Sevick, Carter J.
Smith, Tyler C.
Gumbs, Gia R.
Conlin, Ava Marie S.
CA United States Dept Def Birth Infan
TI Health Outcomes among Infants Born to Women Deployed to United States
Military Operations during Pregnancy
SO BIRTH DEFECTS RESEARCH PART A-CLINICAL AND MOLECULAR TERATOLOGY
LA English
DT Article
DE congenital abnormalities; military personnel; reproductive history;
women's health
ID GULF-WAR VETERANS; CONGENITAL-DEFECTS PROGRAM; BIRTH-DEFECTS;
REPRODUCTIVE OUTCOMES; PRENATAL-DIAGNOSIS; SMALLPOX VACCINE; RISK;
VIETNAM; ATLANTA; COMBAT
AB BACKGROUND: Military professionals who deploy to combat operations may encounter hazards that could adversely affect reproductive health. Pregnant woman are generally exempt from deployment to military operations, however, exposures to such environments may inadvertently occur. We investigated whether maternal deployment during pregnancy was associated with adverse health outcomes in infants. METHODS: The United States Department of Defense Birth and Infant Health Registry identified infants born to military service women between 2002 and 2005, and defined their health outcomes at birth and in the first year of life. Multivariable modeling was applied to investigate preterm birth and birth defects among infants, based on maternal deployment experience during pregnancy. RESULTS: Among 63,056 infants born to military women from 2002 to 2005, 22,596 were born to women with deployment experience in support of the current military operations before, during, or after their pregnancy. These included 2941 infants born to women who appeared to have been deployed some time during their first trimester of pregnancy. Compared to infants born to women who deployed at other times, or never deployed, exposed infants were not more likely to be born preterm, diagnosed with a major birth defect, or diagnosed with a malignancy. CONCLUSIONS: In this exploratory analysis, infants born to women who inadvertently deployed to military operations during their pregnancy were not at increased risk of adverse birth or infant health outcomes. Future analyses should examine outcomes related to specific maternal exposures during deployment, and outcomes among the growing number of infants conceived after deployment. Birth Defects Research (Part A) 91: 117-124, 2011. Published 2010 Wiley-Liss, Inc.(dagger)
C1 [Ryan, Margaret A. K.] USN, Hosp Camp Pendleton, Camp Pendleton, CA 92055 USA.
[Jacobson, Isabel G.; Sevick, Carter J.; Smith, Tyler C.; Gumbs, Gia R.; Conlin, Ava Marie S.] US Dept Def, Ctr Deployment Hlth Res, USN, Hlth Res Ctr, San Diego, CA USA.
RP Ryan, MAK (reprint author), USN, Hosp Camp Pendleton, Occupat Med 5N, Camp Pendleton, CA 92055 USA.
EM margaret.ryan@med.navy
FU U.S. Department of Defense [60504]; Henry M. Jackson Foundation for the
Advancement of Military Medicine, Rockville, Maryland
FX This represents report 09-19, supported by the U.S. Department of
Defense, under work unit no. 60504.; In addition to the authors, members
of the DoD Birth and Infant Health Registry team include Ania
Bukowinski, Kathy Snell, and Brian Feldman. The authors thank Scott L.
Seggerman and Greg D. Boyd from the United States Defense Manpower Data
Center, Monterey Bay, California, for providing demographic and
deployment data, and Michelle Stoia, from the Naval Health Research
Center, San Diego, California, for editorial assistance. The authors
appreciate the support of the Henry M. Jackson Foundation for the
Advancement of Military Medicine, Rockville, Maryland.
NR 47
TC 7
Z9 7
U1 0
U2 5
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1542-0752
EI 1542-0760
J9 BIRTH DEFECTS RES A
JI Birth Defects Res. Part A-Clin. Mol. Teratol.
PD FEB
PY 2011
VL 91
IS 2
BP 117
EP 124
DI 10.1002/bdra.20746
PG 8
WC Developmental Biology; Toxicology
SC Developmental Biology; Toxicology
GA 730LU
UT WOS:000288035600007
PM 21319279
ER
PT J
AU Tait, GB
Richardson, RE
Slocum, MB
Hatfield, MO
Rodriguez, MJ
AF Tait, Gregory B.
Richardson, Robert E.
Slocum, Michael B.
Hatfield, Michael O.
Rodriguez, Manuel J.
TI Reverberant Microwave Propagation in Coupled Complex Cavities
SO IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
LA English
DT Article
DE Coupled cavities; reverberant propagation
ID CHAMBERS
AB A simple model for the analysis of microwave propagation in coupled complex cavities is presented. The cumulative build-up and full exchange of electromagnetic energy between coupled spaces are important issues for wireless systems in reverberant environments, such as below-deck compartments in ships and aircraft cabins and bays. Based on conservation of average energy in the steady state among multiple cavities, the general model formulation is valid for both strong and weak couplings between the cavities caused by window materials, open apertures, closed and open hatches, and cable/pipe penetrations through bulkheads. Application of the model is demonstrated in conjunction with measurements conducted in nested reverberation chambers in the laboratory and in the coupled main weapons bays of a fighter aircraft.
C1 [Tait, Gregory B.; Richardson, Robert E.; Slocum, Michael B.; Hatfield, Michael O.] USN, Ctr Surface Warfare, Dahlgren, VA 22448 USA.
[Rodriguez, Manuel J.] Aeronaut Syst Ctr, Wright Patterson AFB, OH 45433 USA.
RP Tait, GB (reprint author), USN, Ctr Surface Warfare, Dahlgren, VA 22448 USA.
EM gregory.tait@navy.mil
NR 16
TC 13
Z9 14
U1 1
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9375
J9 IEEE T ELECTROMAGN C
JI IEEE Trans. Electromagn. Compat.
PD FEB
PY 2011
VL 53
IS 1
BP 229
EP 232
DI 10.1109/TEMC.2010.2051442
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 722CF
UT WOS:000287407300027
ER
PT J
AU Kwon, YW
Tan, KS
AF Kwon, Y. W.
Tan, K. S.
TI Failure of Ductile Materials Subject to Varying Strain Rates
SO JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME
LA English
DT Article
ID FIBER-REINFORCED COMPOSITES; GLASS/EPOXY COMPOSITES;
MECHANICAL-PROPERTIES; STRENGTH; ALLOYS; STRESS
AB Strain rate affects the mechanical properties of ductile materials in terms of their stiffness and strength. In particular, yield and failure strengths and strains depend on the strain rate applied to the materials. When a metallic material is subjected to a typical dynamic loading, the material usually undergoes various strain-rate loading conditions. One of the main questions is whether the material is going to fail or not. To the authors' best knowledge, there has been no failure criterion proposed for a varying strain-rate loading condition. This paper presents a failure criterion under nonuniform strain-rate loading conditions. Experiments were conducted to support the proposed failure criterion using aluminum alloy AA3003-H14. This study also investigated the that failure envelops in terms of strain rates and the normalized failure strengths. Furthermore, the effects of strain rates on strength and stiffness properties were also examined. [DOI: 10.1115/1.4002054]
C1 [Kwon, Y. W.; Tan, K. S.] USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93940 USA.
RP Kwon, YW (reprint author), USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93940 USA.
NR 16
TC 2
Z9 2
U1 0
U2 1
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0094-9930
J9 J PRESS VESS-T ASME
JI J. Press. Vessel Technol.-Trans. ASME
PD FEB
PY 2011
VL 133
IS 1
AR 011402
DI 10.1115/1.4002054
PG 7
WC Engineering, Mechanical
SC Engineering
GA 709VX
UT WOS:000286470600011
ER
PT J
AU Ward, J
Jarvis, S
Moretti, D
Morrissey, R
DiMarzio, N
Johnson, M
Tyack, P
Thomas, L
Marques, T
AF Ward, Jessica
Jarvis, Susan
Moretti, David
Morrissey, Ronald
DiMarzio, Nancy
Johnson, Mark
Tyack, Peter
Thomas, Len
Marques, Tiago
TI Beaked whale (Mesoplodon densirostris) passive acoustic detection in
increasing ambient noise
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID ECHOLOCATION CLICKS; SOUND
AB Passive acoustic detection is being increasingly used to monitor visually cryptic cetaceans such as Blainville's beaked whales (Mesoplodon densirostris) that may be especially sensitive to underwater sound. The efficacy of passive acoustic detection is traditionally characterized by the probability of detecting the animal's sound emissions as a function of signal-to-noise ratio. The probability of detection can be predicted using accepted, but not necessarily accurate, models of the underwater acoustic environment. Recent field studies combining far-field hydrophone arrays with on-animal acoustic recording tags have yielded the location and time of each sound emission from tagged animals, enabling in-situ measurements of the probability of detection. However, tagging studies can only take place in calm seas and so do not reflect the full range of ambient noise conditions under which passive acoustic detection may be used. Increased surface-generated noise from wind and wave interaction degrades the signal-to-noise ratio of animal sound receptions at a given distance leading to a reduction in probability of detection. This paper presents a case study simulating the effect of increasing ambient noise on detection of M. densirostris foraging clicks recorded from a tagged whale swimming in the vicinity of a deep-water, bottom-mounted hydrophone array. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3531844]
C1 [Ward, Jessica; Jarvis, Susan; Moretti, David; Morrissey, Ronald; DiMarzio, Nancy] USN, Undersea Warfare Ctr, Div Newport, Newport, RI USA.
[Johnson, Mark; Tyack, Peter] Woods Hole Oceanog Inst, Dept Biol, Woods Hole, MA 02543 USA.
[Thomas, Len; Marques, Tiago] Univ St Andrews, Ctr Res Ecol & Environm Modelling, St Andrews KY16 9LZ, Fife, Scotland.
RP Ward, J (reprint author), USN, Undersea Warfare Ctr, Div Newport, 1176 Howell St, Newport, RI USA.
EM jessica.ward@navy.mil
RI Tyack, Peter/D-6209-2013; Marques, Tiago/A-5530-2010;
OI Tyack, Peter/0000-0002-8409-4790; Marques, Tiago/0000-0002-2581-1972;
Thomas, Len/0000-0002-7436-067X
FU Office of Naval Research [N45]; Integrated Warfare Systems 5 (IWS5);
Strategic Environmental Research and Development Program; National
Oceanographic Partnership Program; U.S. National Marine Fisheries
Service; Office of Protected Resources; International Association of Oil
and Gas Producers Joint Industry Programme on Exploration and Production
Sound and Marine Life
FX These data were collected during the 2007 Behavioral Response Study
(BRS) funded by N45, Office of Naval Research, Integrated Warfare
Systems 5 (IWS5) and Strategic Environmental Research and Development
Program. We would like to thank the entire field team that participated
in the 2007 BRS for supporting the effort that provided the data used in
this study. This work was funded by two partners under the National
Oceanographic Partnership Program: The Ocean Acoustics Program of the
U.S. National Marine Fisheries Service, Office of Protected Resources,
and the International Association of Oil and Gas Producers Joint
Industry Programme on Exploration and Production Sound and Marine Life.
The research permits were issued to John Boreman (U.S. National Marine
Fisheries Service (NMFS) 1121-1900), Peter Tyack (U.S. NMFS 981-1578),
and Ian Boyd (Bahamas permit #02/07). The tagging research was approved
by the WHOI Institutional Animal Care and Use Committee. In addition,
this work would not have been possible without the contributions of
David Deveau, who provided the historical ambient noise measurements,
and the late Jim Pazera, who generously shared his expertise as system
engineer of the AUTEC hydrophones shortly before his untimely death. Jim
is greatly missed by all his colleagues at NUWC.
NR 28
TC 9
Z9 9
U1 0
U2 21
PU ACOUSTICAL SOC AMER AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0001-4966
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD FEB
PY 2011
VL 129
IS 2
BP 662
EP 669
DI 10.1121/1.3531844
PG 8
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 726HB
UT WOS:000287709700016
PM 21361425
ER
PT J
AU Schlundt, CE
Dear, RL
Houser, DS
Bowles, AE
Reidarson, T
Finneran, JJ
AF Schlundt, Carolyn E.
Dear, Randall L.
Houser, Dorian S.
Bowles, Ann E.
Reidarson, Tom
Finneran, James J.
TI Auditory evoked potentials in two short-finned pilot whales
(Globicephala macrorhynchus)
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID DOLPHINS TURSIOPS-TRUNCATUS; HEARING MEASUREMENTS; OTOTOXICITY;
COHERENCE; AUDIOGRAMS; AUDIOMETRY; RESPONSES; AMIKACIN
AB The hearing sensitivities of two short-finned pilot whales (Globicephala macrorhynchus) were investigated by measuring auditory evoked potentials generated in response to clicks and sinusoidal amplitude modulated (SAM) tones. The first whale tested, an adult female, was a long-time resident at SeaWorld San Diego with a known health history. Click-evoked responses in this animal were similar to those measured in other echolocating odontocetes. Auditory thresholds were comparable to dolphins of similar age determined with similar evoked potential methods. The region of best sensitivity was near 40 kHz and the upper limit of functional hearing was between 80 and 100 kHz. The second whale tested, a juvenile male, was recently stranded and deemed non-releasable. Click-evoked potentials were not detected in this animal and testing with SAM tones suggested severe hearing loss above 10 kHz. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3531875]
C1 [Schlundt, Carolyn E.] ITT Corp, San Diego, CA 92110 USA.
[Dear, Randall L.; Houser, Dorian S.] Natl Marine Mammal Fdn, San Diego, CA 92106 USA.
[Bowles, Ann E.] Hubbs SeaWorld Res Inst, San Diego, CA 92109 USA.
[Reidarson, Tom] SeaWorld San Diego, San Diego, CA 92109 USA.
[Finneran, James J.] USN, Space & Naval Warfare Syst Ctr Pacific, Biosci Div, San Diego, CA 92152 USA.
RP Schlundt, CE (reprint author), ITT Corp, 3276 Rosecrans St, San Diego, CA 92110 USA.
EM Carolyn.Melka@itt.com
OI Houser, Dorian/0000-0002-0960-8528
FU US Office of Naval Research; SeaWorld of California at San Diego
FX Veterinary, Animal Training, Animal Care, and facilities staff of
SeaWorld of California at San Diego provided invaluable cooperation and
support for the hearing tests, as did G. Kieffer of the Sea Aquarium and
the Southern Caribbean Cetacean Network (SCCN) in Curacao, Netherlands
Antilles. Financial support was provided by the US Office of Naval
Research. Hearing tests were conducted as routine health screenings for
the two subjects; restraint and handling protocols were approved and
supervised by SeaWorld veterinarians.
NR 33
TC 8
Z9 8
U1 0
U2 15
PU ACOUSTICAL SOC AMER AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0001-4966
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD FEB
PY 2011
VL 129
IS 2
BP 1111
EP 1116
DI 10.1121/1.3531875
PG 6
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 726HB
UT WOS:000287709700058
PM 21361467
ER
PT J
AU Sadananda, K
Vasudevan, AK
AF Sadananda, K.
Vasudevan, A. K.
TI Review of Environmentally Assisted Cracking
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT International Symposium on the Stress Corrosion Cracking in Structural
Materials at Ambient Temperatures
CY SEP, 2009
CL Padua, ITALY
ID LIQUID-METAL EMBRITTLEMENT; STRESS-CORROSION CRACKING; HYDROGEN
EMBRITTLEMENT; GROWTH; STEEL; FRACTURE; MECHANISM; PROPAGATION; FATIGUE;
ALLOY
AB Many efforts have been made in the past by several researchers to arrive at some unifying principles governing the embrittlement phenomena. An inescapable conclusion reached by all these efforts was that the behavior is very complex. Hence, recognizing the complexity of material/environment behavior, we focus our attention here only in extracting some similarities in the experimental trends to arrive at some generic principles of behavior. Crack nucleation and growth are examined under static load in the presence of internal and external environments. Stress concentration, either pre-existing or in-situ generated, appears to be a requirement for embrittlement. A chemical stress concentration factor is defined for a given material/environment system as the ratio of failure stress with and without the damaging chemical environment. All factors that affect the buildup of the required stress concentration, such as planarity of slip, stacking fault energy, etc., also affect the stress-corrosion behavior. The chemical stress concentration factor is coupled with the mechanical stress concentration factor. In addition, generic features for all systems appear to be (a) an existence of a threshold stress as a function of concentration of the damaging environment and flow properties of the material, and (b) an existence of a limiting threshold as a function of concentration, indicative of a damage saturation for that environment. Kinetics of crack growth also depends on concentration and the mode of crack growth. In general, environment appears to enhance crack tip ductility on one side by the reduction of energy for dislocation nucleation and glide, and to reduce cohesive energy for cleavage, on the other. These two opposing factors are coupled to provide environmentally induced crack nucleation and growth. The relative ratio of these two opposing factors depends on concentration and flow properties, thereby affecting limiting thresholds. The limiting concentration or saturation depends on the relative chemistry of environment and material. A dynamic dislocation model is suggested to account for crack growth.
C1 [Sadananda, K.] Tech Data Anal, Falls Church, VA 22042 USA.
[Vasudevan, A. K.] Off Naval Res, Arlington, VA 22203 USA.
RP Sadananda, K (reprint author), Tech Data Anal, Falls Church, VA 22042 USA.
EM kuntimaddisada@yahoo.com
NR 95
TC 18
Z9 18
U1 3
U2 30
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD FEB
PY 2011
VL 42A
IS 2
BP 279
EP 295
DI 10.1007/s11661-010-0472-3
PG 17
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 714WO
UT WOS:000286839900004
ER
PT J
AU Sadananda, K
Vasudevan, AK
AF Sadananda, K.
Vasudevan, A. K.
TI Failure Diagram for Chemically Assisted Crack Growth
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT International Symposium on the Stress Corrosion Cracking in Structural
Materials at Ambient Temperatures
CY SEP, 2009
CL Padua, ITALY
ID CORROSION CRACKING; FRACTURE; STRESS; EMBRITTLEMENT; DUCTILE
AB A failure diagram that combines the thresholds for failure of a smooth specimen to that of a fracture mechanics specimen, similar to the modified Kitagawa diagram in fatigue, is presented. For a given material/environment system, the diagram defines conditions under which a crack initiated at the threshold stress in a smooth specimen becomes a propagating crack, by satisfying the threshold stress intensity of a long crack. In analogy with fatigue, it is shown that internal stresses or local stress concentrations are required to provide the necessary mechanical crack tip driving forces, on one hand, and reaction/transportation kinetics to provide the chemical potential gradients, on the other. Together, they help in the initiation and propagation of the cracks. The chemical driving forces can be expressed as equivalent mechanical stresses using the failure diagram. Both internal stresses and their gradients, in conjunction with the chemical driving forces, have to meet the minimum magnitude and the minimum gradients to sustain the growth of a microcrack formed. Otherwise, nonpropagating conditions will prevail or a crack formed will remain dormant. It is shown that the processes underlying the crack nucleation in a smooth specimen and the crack growth of a fracture mechanics specimen are essentially the same. Both require building up of internal stresses by local plasticity. The process involves intermittent crack tip blunting and microcrack nucleation until the crack becomes unstable under the applied stress.
C1 [Sadananda, K.] Tech Data Anal, Falls Church, VA 22143 USA.
[Vasudevan, A. K.] Off Naval Res, Arlington, VA 22203 USA.
RP Sadananda, K (reprint author), Tech Data Anal, Falls Church, VA 22143 USA.
EM kuntimaddisada@yahoo.com
NR 30
TC 4
Z9 4
U1 4
U2 9
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD FEB
PY 2011
VL 42A
IS 2
BP 296
EP 303
DI 10.1007/s11661-010-0469-y
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 714WO
UT WOS:000286839900005
ER
PT J
AU Goswami, R
Spanos, G
Pao, PS
Holtz, RL
AF Goswami, R.
Spanos, G.
Pao, P. S.
Holtz, R. L.
TI Microstructural Evolution and Stress Corrosion Cracking Behavior of
Al-5083
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT International Symposium on the Stress Corrosion Cracking in Structural
Materials at Ambient Temperatures
CY SEP, 2009
CL Padua, ITALY
ID AL-MG ALLOY; PRECIPITATION
AB The fine scale microstructure of Al-5083 (H-131) sensitized at 448 K (175 degrees C) for 1, 10, 25, 50, 100, 240, 500, and 1000 hours has been investigated using transmission electron microscopy (TEM) to study the evolution of the beta phase (Al(3)Mg(2)) at grain boundaries and on pre-existing intragranular particles. In fully sensitized Al-5083, the beta phase (Al(3)Mg(2)) forms heterogeneously both at grain boundaries and on pre-existing particles, which are enriched in manganese. TEM observations showed that the grain boundary precipitation of the beta phase initially occurs between 0 to 1 hour of aging at 448 K (175 degrees C), and that the beta phase grows with a ribbonlike morphology. The grain boundary planes are covered by the beta phase after 240 hours of aging. The contribution of microstructure, defects, and environment on the stress corrosion cracking (SCC) behavior is discussed.
C1 [Goswami, R.; Spanos, G.; Pao, P. S.; Holtz, R. L.] USN, Res Lab, Washington, DC 20375 USA.
RP Goswami, R (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM ramasis.goswami@nrl.navy.mil
NR 14
TC 35
Z9 36
U1 3
U2 28
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD FEB
PY 2011
VL 42A
IS 2
BP 348
EP 355
DI 10.1007/s11661-010-0262-y
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 714WO
UT WOS:000286839900010
ER
PT J
AU Kujawski, D
Yerramilli, S
Vasudevan, AK
AF Kujawski, Daniel
Yerramilli, Sindhoora
Vasudevan, A. K.
TI Role of Viscosity on Capillary Flow and Stress Corrosion Cracking
Behavior
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT International Symposium on the Stress Corrosion Cracking in Structural
Materials at Ambient Temperatures
CY SEP, 2009
CL Padua, ITALY
ID EMBRITTLEMENT
AB It is documented that the viscosity has a significant effect on stress corrosion cracking (SCC) behavior in terms of the K-da/dt relation. In order to better understand the role of viscosity and its effect on transport of aqueous solution to the crack tip due to capillary action at the crack tip, experiments were conducted using a glass-metal setup. The confined space between the crack-mouth faces was simulated using wedge-type geometry between a glass slide and 7475 aluminum plate. The space between the glass and aluminum crevice was carefully controlled using spacers. The effect of viscosity was modeled using water, glycerin, and its mixture. According to our best knowledge, this article presents the first simple model of experimental simulation of the capillary flow phenomenon with a goal of arriving at a better understanding of how the viscosity affects the SCC behavior. Experimental results of several materials taken from the literature support the role of viscosity on SCC behavior.
C1 [Kujawski, Daniel] Western Michigan Univ, Dept Mech & Aeronaut Engn, Kalamazoo, MI 49008 USA.
[Yerramilli, Sindhoora] Western Michigan Univ, Dept Ind & Mfg Engn, Kalamazoo, MI 49008 USA.
[Vasudevan, A. K.] Off Naval Res, Arlington, VA 22203 USA.
RP Kujawski, D (reprint author), Western Michigan Univ, Dept Mech & Aeronaut Engn, Kalamazoo, MI 49008 USA.
EM daniel.kujawski@wmich.edu
NR 13
TC 0
Z9 0
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD FEB
PY 2011
VL 42A
IS 2
BP 373
EP 376
DI 10.1007/s11661-010-0374-4
PG 4
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 714WO
UT WOS:000286839900013
ER
PT J
AU Vasudevan, AK
Sadananda, K
AF Vasudevan, A. K.
Sadananda, K.
TI Role of Internal Stresses on the Incubation Times during Stress
Corrosion Cracking
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT International Symposium on the Stress Corrosion Cracking in Structural
Materials at Ambient Temperatures
CY SEP, 2009
CL Padua, ITALY
ID 3.0-PERCENT NACL SOLUTION; LOW-ALLOY STEEL; GROWTH BEHAVIOR; ALUMINUM
AB We have examined the incubation times in two alloys, 7075-T651 aluminum alloy and 4140 steel, as a function of applied K, using the published data in aqueous environment. The role of overloads was compared with the results from those without overloads, for a given environment. Effect of environment (NaCl vs deionized water) was also examined. The results show that in a constant K test, the incubation time increases with decreasing K. When a single overload cycle was applied, the time increased with percent overload for a constant background K, indicating that overload cycle affected the crack tip driving forces. These effects varied with the environment. The changes in the incubation times are analyzed considering one-to-one correspondence between the crack tip driving force and the times. Overloads contributed to compressive residual or internal stresses, thereby affecting the crack tip driving force. The stresses are related to changes in the plastic zone (PZ) sizes formed before and after the overloads. The effective stress intensity due to internal stress, K(int), is defined and is shown to be a function of PZ size. Similarly, condition for crack initiation is expressed as K(total) = K(app) +/- K(int) >= K(Iscc). A detailed methodology for the determination of K(int) is outlined.
C1 [Vasudevan, A. K.] Off Naval Res, Arlington, VA 22203 USA.
[Sadananda, K.] Tech Data Anal Inc, Falls Church, VA 22042 USA.
RP Vasudevan, AK (reprint author), Off Naval Res, Arlington, VA 22203 USA.
EM vasudea@onr.navy.mil
NR 16
TC 7
Z9 7
U1 0
U2 8
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD FEB
PY 2011
VL 42A
IS 2
BP 396
EP 404
DI 10.1007/s11661-010-0470-5
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 714WO
UT WOS:000286839900016
ER
PT J
AU Vasudevan, AK
Sadananda, K
AF Vasudevan, A. K.
Sadananda, K.
TI Role of Slip Mode on Stress Corrosion Cracking Behavior
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT International Symposium on the Stress Corrosion Cracking in Structural
Materials at Ambient Temperatures
CY SEP, 2009
CL Padua, ITALY
ID FRACTURE TOUGHNESS; REAGING TREATMENTS; MARAGING STEEL; MG ALLOY;
RETROGRESSION; STRENGTH
AB In this article, we examine the effect of aging treatment and the role of planarity of slip on stress corrosion cracking (SCC) behavior in precipitation-hardened alloys. With aging, the slip mode can change from a planar slip in the underage (UA) to a wavy slip in the overage (OA) region. This, in turn, results in sharpening the crack tip in the UA compared to blunting in the OA condition. We propose that the planar slip enhances the stress concentration effects by making the alloys more susceptible to SCC. In addition, the planarity of slip enhances plateau velocities, reduces thresholds for SCC, and reduces component life. We show that the effect of slip planarity is somewhat similar to the effects of mechanically induced stress concentrations such as due to the presence of sharp notches. Aging treatment also causes variations in the matrix and grain boundary (GB) microstructures, along with typical mechanical and SCC properties. These properties include yield stress, work hardening rate, fracture toughness K-IC, thresholds K-Iscc, and steady-state plateau velocity (da/dt). The SCC data for a wide range of ductile alloys including 7050, 7075, 5083, 5456 Al, MAR M steels, and solid solution copper-base alloys are collected from the literature. Our assertion is that slip mode and the resulting stress concentration are important factors in SCC behavior. This is further supported by similar observations in many other systems including some steels, Al alloys, and Cu alloys.
C1 [Vasudevan, A. K.] Off Naval Res, Arlington, VA 22203 USA.
[Sadananda, K.] Tech Data Anal Inc, Falls Church, VA 22042 USA.
RP Vasudevan, AK (reprint author), Off Naval Res, Arlington, VA 22203 USA.
EM vasudea@onr.navy.mil
NR 46
TC 6
Z9 6
U1 0
U2 7
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD FEB
PY 2011
VL 42A
IS 2
BP 405
EP 414
DI 10.1007/s11661-010-0471-4
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 714WO
UT WOS:000286839900017
ER
PT J
AU Lee, EU
Goswami, R
Jones, M
Vasudevan, AK
AF Lee, E. U.
Goswami, R.
Jones, M.
Vasudevan, A. K.
TI Environment-Assisted Cracking in Custom 465 Stainless Steel
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT International Symposium on the Stress Corrosion Cracking in Structural
Materials at Ambient Temperatures
CY SEP, 2009
CL Padua, ITALY
ID STRESS-CORROSION CRACKING; HIGH STRENGTH STEELS; MARAGING STEEL;
FRACTURE TOUGHNESS; SOLUTION CHEMISTRY; SUSCEPTIBILITY; BEHAVIOR
AB The influence of cold work and aging on the environment-assisted cracking (EAC) behavior and mechanical properties of Custom 465 stainless steel (SS) was studied. Four sets of specimens were made and tested. All specimens were initially solution annealed, rapidly cooled, and refrigerated (SAR condition). The first specimen set was steel in the SAR condition. The second specimen set was aged to the H1000 condition. The third specimen set was 60 pct cold worked, and the fourth specimen set was 60 pct cold worked and aged at temperatures ranging from 755 K to 825 K (482 degrees C to 552 degrees C) for 4 hours in air. The specimens were subsequently subjected to EAC and mechanical testing. The EAC testing was conducted, using the rising step load (RSL) technique, in aqueous solutions of NaCl of pH 7.3 with concentrations ranging from 0.0035 to 3.5 pct at room temperature. The microstructure, dislocation substructure, and crack paths, resulting from the cold work, aging, or subsequent EAC testing, were examined by optical microscopy, transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The aging of the cold-worked specimens induced carbide precipitation within the martensite lath, but not at the lath or packet boundaries. In the aged specimens, as aging temperature rose, the threshold stress intensity for EAC (K-IEAC), elongation, and fracture toughness increased, but the strength and hardness decreased. The K-IEAC also decreased with increasing yield strength and NaCl concentration. In the SAR and H1000 specimens, the EAC propagated along the prior austenite grain boundary, while in the cold-worked and cold-worked and aged specimens, the EAC propagated along the martensite lath, and its packet and prior austenite grain boundaries. The controlling mechanism for the observed EAC was identified to be hydrogen embrittlement.
C1 [Lee, E. U.; Jones, M.] USN, Air Warfare Ctr, Div Aircraft, Patuxent River, MD 20670 USA.
[Goswami, R.] USN, Res Lab, Washington, DC 20375 USA.
[Goswami, R.] Sci Applicat Int Corp, Mclean, VA 22102 USA.
[Vasudevan, A. K.] Off Naval Res, Arlington, VA 22203 USA.
RP Lee, EU (reprint author), USN, Air Warfare Ctr, Div Aircraft, Patuxent River, MD 20670 USA.
EM eun.lee@navy.mil
NR 44
TC 4
Z9 5
U1 1
U2 10
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD FEB
PY 2011
VL 42A
IS 2
BP 415
EP 423
DI 10.1007/s11661-010-0401-5
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 714WO
UT WOS:000286839900018
ER
PT J
AU Abdel-Hamid, TK
AF Abdel-Hamid, Tarek K.
TI Single-Loop Project Controls: Reigning Paradigms or Straitjackets?
SO PROJECT MANAGEMENT JOURNAL
LA English
DT Article
DE feedback; mental models; multiloop nonlinear systems; planning and
control; simulation; system dynamics
ID DYNAMIC DECISION-MAKING; SYSTEMS; HEALTH
AB This article reports on the results from an ongoing research program to study the role mental models play in project decision making. Project management belongs to the class of multiloop nonlinear feedback systems, but most managers do not see it that way. Our experimental results suggest that managers adopt simplistic single-loop views of causality, ignore multiple feedback interactions, and are insensitive to nonlinearities. Specifically, the article examines single-loop models of project planning and control, discusses their limitations, and proposes tools to address them.
C1 USN, Postgrad Sch, Dept Informat Sci, Monterey, CA USA.
RP Abdel-Hamid, TK (reprint author), USN, Postgrad Sch, Dept Informat Sci, Monterey, CA USA.
NR 28
TC 2
Z9 2
U1 1
U2 6
PU WILEY PERIODICALS, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN STREET, MALDEN, MA 02148-529 USA
SN 8756-9728
J9 PROJ MANAG J
JI Proj. Manag. J.
PD FEB
PY 2011
VL 42
IS 1
BP 17
EP 30
DI 10.1002/pmj.20176
PG 14
WC Management
SC Business & Economics
GA 713BQ
UT WOS:000286710400003
ER
PT J
AU McBeth, JM
Little, BJ
Ray, RI
Farrar, KM
Emerson, D
AF McBeth, Joyce M.
Little, Brenda J.
Ray, Richard I.
Farrar, Katherine M.
Emerson, David
TI Neutrophilic Iron-Oxidizing "Zetaproteobacteria" and Mild Steel
Corrosion in Nearshore Marine Environments
SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID RICH MICROBIAL MATS; BACTERIAL DIVERSITY; AQUATIC SEDIMENTS; DEEP-SEA;
REDUCTION; AMPLIFICATION; COMMUNITIES; ENRICHMENT; DEPOSITION; SEQUENCES
AB Microbiologically influenced corrosion (MIC) of mild steel in seawater is an expensive and enduring problem. Little attention has been paid to the role of neutrophilic, lithotrophic, iron-oxidizing bacteria (FeOB) in MIC. The goal of this study was to determine if marine FeOB related to Mariprofundus are involved in this process. To examine this, field incubations and laboratory microcosm experiments were conducted. Mild steel samples incubated in nearshore environments were colonized by marine FeOB, as evidenced by the presence of helical iron-encrusted stalks diagnostic of the FeOB Mariprofundus ferrooxydans, a member of the candidate class "Zetaproteobacteria." Furthermore, Mariprofundus-like cells were enriched from MIC biofilms. The presence of Zetaproteobacteria was confirmed using a Zetaproteobacteria-specific small-subunit (SSU) rRNA gene primer set to amplify sequences related to M. ferrooxydans from both enrichments and in situ samples of MIC biofilms. Temporal in situ incubation studies showed a qualitative increase in stalk distribution on mild steel, suggesting progressive colonization by stalk-forming FeOB. We also isolated a novel FeOB, designated Mariprofundus sp. strain GSB2, from an iron oxide mat in a salt marsh. Strain GSB2 enhanced uniform corrosion from mild steel in laboratory microcosm experiments conducted over 4 days. Iron concentrations (including precipitates) in the medium were used as a measure of corrosion. The corrosion in biotic samples (7.4 +/- 0.1 mM) was significantly higher than that in abiotic controls (5.0 +/- 0.1 mM). These results have important implications for the role of FeOB in corrosion of steel in nearshore and estuarine environments. In addition, this work shows that the global distribution of Zetaproteobacteria is far greater than previously thought.
C1 [McBeth, Joyce M.; Farrar, Katherine M.; Emerson, David] Bigelow Lab Ocean Sci, W Boothbay Harbor, ME 04575 USA.
[Little, Brenda J.; Ray, Richard I.] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Farrar, Katherine M.] Bowdoin Coll, Brunswick, ME 04011 USA.
RP McBeth, JM (reprint author), Bigelow Lab Ocean Sci, Box 475,180 McKown Point Rd, W Boothbay Harbor, ME 04575 USA.
EM jmcbeth@bigelow.org
RI McBeth, Joyce/A-7454-2008
OI McBeth, Joyce/0000-0002-9022-1178
FU U.S. Office of Naval Research [N0001410WX20247]
FX Funding for this project was provided by the U.S. Office of Naval
Research (award number N0001410WX20247).
NR 51
TC 52
Z9 53
U1 2
U2 33
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0099-2240
J9 APPL ENVIRON MICROB
JI Appl. Environ. Microbiol.
PD FEB
PY 2011
VL 77
IS 4
BP 1405
EP 1412
DI 10.1128/AEM.02095-10
PG 8
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 717WM
UT WOS:000287078100031
PM 21131509
ER
PT J
AU Tieu, KD
MacGregor, JL
AF Tieu, Kathy D.
MacGregor, Jennifer L.
TI Successful Treatment of Vulvodynia With Botulinum Toxin A
SO ARCHIVES OF DERMATOLOGY
LA English
DT Letter
C1 [Tieu, Kathy D.] USN, San Diego Med Ctr, Dept Dermatol, San Diego, CA 92152 USA.
[MacGregor, Jennifer L.] Georgetown Univ, Dept Dermatol, Washington, DC USA.
[MacGregor, Jennifer L.] Washington Inst Dermatol Laser Surg, Washington, DC USA.
RP Tieu, KD (reprint author), 34520 Bob Wilson Dr,Ste 300, San Diego, CA 92134 USA.
EM kathy.tieu@med.navy.mil
NR 5
TC 3
Z9 3
U1 0
U2 0
PU AMER MEDICAL ASSOC
PI CHICAGO
PA 515 N STATE ST, CHICAGO, IL 60654-0946 USA
SN 0003-987X
J9 ARCH DERMATOL
JI Arch. Dermatol.
PD FEB
PY 2011
VL 147
IS 2
BP 251
EP 252
DI 10.1001/archdermatol.2010.443
PG 2
WC Dermatology
SC Dermatology
GA 723VX
UT WOS:000287536500025
PM 21339463
ER
PT J
AU Dennis, JA
Martinez, OV
Landy, DC
Malinin, TI
Morris, PR
Fox, WP
Buck, BE
Temple, HT
AF Dennis, Jeremy A.
Martinez, Octavio V.
Landy, David C.
Malinin, Theodore I.
Morris, Paul R.
Fox, William P.
Buck, Billy E.
Temple, H. Thomas
TI A comparison of two microbial detection methods used in aseptic
processing of musculoskeletal allograft tissues
SO CELL AND TISSUE BANKING
LA English
DT Article
DE Allograft; Musculoskeletal tissue; Culture; Microbial; Sensitivity
ID TENDON-BONE ALLOGRAFTS; GAMMA-IRRADIATION; CULTURES
AB Tissues from 78 musculoskeletal donors were concurrently tested for microorganisms using both a swab and liquid culture method. An aggregate total of 20 organisms were detected by both methods. The swab detected 4/20 organisms while the liquid culture detected 18/20 organisms. The swab method yielded sensitivity and negative predictive values of 20 and 92.3%, respectively. Comparatively, the liquid culture displayed a sensitivity of 90% and a negative predictive value of 99%. These results clearly demonstrate that the liquid culture method is superior to swab cultures in microbial detection. Additional studies are necessary to determine the optimal culture conditions for different types of tissues when utilizing the liquid culture method.
C1 [Dennis, Jeremy A.; Martinez, Octavio V.; Malinin, Theodore I.; Morris, Paul R.; Buck, Billy E.; Temple, H. Thomas] Univ Miami, Miller Sch Med, Dept Orthopaed, Tissue Bank, Miami, FL 33136 USA.
[Landy, David C.] Univ Miami, Miller Sch Med, MD PhD Program, Miami, FL 33136 USA.
[Fox, William P.] USN, Postgrad Sch, Dept Def Anal, Monterey, CA 93943 USA.
RP Temple, HT (reprint author), Univ Miami, Miller Sch Med, Dept Orthopaed, Tissue Bank, 1600 NW 10th Ave,8th Floor R-12, Miami, FL 33136 USA.
EM htemple@med.miami.edu
NR 12
TC 6
Z9 6
U1 0
U2 0
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1389-9333
J9 CELL TISSUE BANK
JI Cell Tissue Banking
PD FEB
PY 2011
VL 12
IS 1
SI SI
BP 45
EP 50
DI 10.1007/s10561-009-9158-8
PG 6
WC Cell Biology; Engineering, Biomedical
SC Cell Biology; Engineering
GA 726UU
UT WOS:000287752700014
PM 19806469
ER
PT J
AU Liu, XA
Feldman, JL
Cahill, DG
Yang, HS
Crandall, RS
Bernstein, N
Photiadis, DM
Mehl, MJ
Papaconstantopoulos, DA
AF Liu, Xiao
Feldman, J. L.
Cahill, D. G.
Yang, Ho-Soon
Crandall, R. S.
Bernstein, N.
Photiadis, D. M.
Mehl, M. J.
Papaconstantopoulos, D. A.
TI Anomalously High Thermal Conductivity of Amorphous Silicon Films
Prepared by Hot-wire Chemical Vapor Deposition
SO CHINESE JOURNAL OF PHYSICS
LA English
DT Article
ID LOW-ENERGY EXCITATIONS; THIN-FILMS; ACOUSTIC ATTENUATION; NOBLE-METALS;
GLASSES; SOLIDS; SI; TRANSITION; CRYSTALS; MODEL
AB We report anomalously high thermal conductivities of amorphous Si (a-Si) films prepared by hot-wire chemical-vapor deposition (HWCVD) at the National Renewable Energy laboratory (NREL), that is a factor of 4 similar to 6 higher than predicted by the model of minimum thermal conductivity. The temperature dependent thermal conductivities are measured with the time-domain thermoreflectance method on two thin films and with the 3 omega method on a thick film. For all these films, the thermal conductivity shows a strong phonon mean free path dependence that has So far only been found in crystalline semiconductor alloys. Similar HWCVD a-Si films prepared at the U. Illinois do not show an enhanced thermal conductivity even though the Raman spectra of the NREL and the U. Illinois samples are essentially identical. We also applied a Kubo based theory using a tight-binding method on three 1000 atom continuous random network models. The theory gives higher thermal conductivity for more ordered models, but not high enough to explain our results, even after extrapolating to lower frequencies with a Boltzmann approach. Our results show that the thermal conductivity of a-Si depends strongly on the details of their microstructure that are not revealed by vibrational spectroscopy.
C1 [Liu, Xiao; Feldman, J. L.; Bernstein, N.; Photiadis, D. M.; Mehl, M. J.; Papaconstantopoulos, D. A.] USN, Res Lab, Washington, DC 20375 USA.
[Feldman, J. L.; Papaconstantopoulos, D. A.] George Mason Univ, Dept Computat & Data Sci, Fairfax, VA 22030 USA.
[Cahill, D. G.] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA.
[Cahill, D. G.] Univ Illinois, Mat Res Lab, Urbana, IL 61801 USA.
[Yang, Ho-Soon] Pusan Natl Univ, Dept Phys, Pusan 609735, South Korea.
[Crandall, R. S.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Liu, XA (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM xiao.liu@nrl.navy.mil
RI Cahill, David/B-3495-2014; Mehl, Michael/H-8814-2016
FU U.S. Department of Energy [DEFG02-91-ER45439]; office of Naval Research
FX This research was supported by the U.S. Department of Energy grant No.
DEFG02-91-ER45439 and the office of Naval Research.
NR 34
TC 0
Z9 0
U1 1
U2 10
PU PHYSICAL SOC REPUBLIC CHINA
PI TAIPEI
PA CHINESE JOURNAL PHYSICS PO BOX 23-30, TAIPEI 10764, TAIWAN
SN 0577-9073
J9 CHINESE J PHYS
JI Chin. J. Phys.
PD FEB
PY 2011
VL 49
IS 1
SI SI
BP 359
EP 368
PG 10
WC Physics, Multidisciplinary
SC Physics
GA 710DC
UT WOS:000286490100044
ER
PT J
AU Wachs, JP
Kolsch, M
Stern, H
Edan, Y
AF Wachs, Juan Pablo
Koelsch, Mathias
Stern, Helman
Edan, Yael
TI Vision-Based Hand-Gesture Applications
SO COMMUNICATIONS OF THE ACM
LA English
DT Article
ID RECOGNITION; GAMES
C1 [Wachs, Juan Pablo] Purdue Univ, Sch Ind Engn, W Lafayette, IN 47907 USA.
[Koelsch, Mathias] USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
[Koelsch, Mathias] USN, Postgrad Sch, Modeling Virtual Environm & Simulat Inst, Monterey, CA USA.
[Stern, Helman; Edan, Yael] Ben Gurion Univ Negev, Dept Ind Engn & Management, Beer Sheva, Israel.
RP Wachs, JP (reprint author), Purdue Univ, Sch Ind Engn, W Lafayette, IN 47907 USA.
EM jpwachs@purdue.edu; kolsch@nps.edu; helman@bgumail.bgu.ac.il;
yael@bgu.ac.il
RI EDAN, YAEL/F-2112-2012;
OI Wachs, Juan/0000-0002-6425-5745
FU National Research Council at the Naval Postgraduate School, Monterey,
CA; Paul Ivanier Center for Robotics Research & Production Management at
Ben-Gurion University of the Negev
FX This research was performed while the first author held a National
Research Council Research Associateship Award at the Naval Postgraduate
School, Monterey, CA. It was partially supported by the Paul Ivanier
Center for Robotics Research & Production Management at Ben-Gurion
University of the Negev.
NR 54
TC 164
Z9 182
U1 0
U2 16
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 2 PENN PLAZA, STE 701, NEW YORK, NY 10121-0701 USA
SN 0001-0782
EI 1557-7317
J9 COMMUN ACM
JI Commun. ACM
PD FEB
PY 2011
VL 54
IS 2
BP 60
EP 71
DI 10.1145/1897816.1897838
PG 12
WC Computer Science, Hardware & Architecture; Computer Science, Software
Engineering; Computer Science, Theory & Methods
SC Computer Science
GA 726DQ
UT WOS:000287699400028
ER
PT J
AU Kragalott, M
Kluskens, MS
Zolnick, DA
Dorsey, WM
Valenzi, JA
AF Kragalott, Mark
Kluskens, Michael S.
Zolnick, Dale A.
Dorsey, W. Mark
Valenzi, John A.
TI A Toolset Independent Hybrid Method for Calculating Antenna Coupling
SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
LA English
DT Article
DE Electromagnetic coupling; electromagnetic interference (EMI);
reciprocity theorem; surface equivalence
ID EQUIVALENT CURRENTS; ALGORITHMS; SURFACES
AB Calculation of the electromagnetic interference (EMI) between electrically large antennas mounted on ships is important for a variety of Navy problems. This paper presents a toolset independent hybrid method for calculating the power at receive antenna terminals relative to the power incident on transmit antenna terminals. The hybrid method coupling results are validated against full-wave computational electromagnetic (CEM) simulations and measurements. An advantage of the proposed hybrid approach is that CEM calculations for antenna near-fields and propagation between antennas can be executed with user-preferred tools. In addition, transmit and receive antenna calculations are executed in transmit mode independent of ship structures. Thus, antenna calculations can be stored in a library for calculation reuse and optimization of antenna placement for EMI reduction.
C1 [Kragalott, Mark; Kluskens, Michael S.; Zolnick, Dale A.; Dorsey, W. Mark; Valenzi, John A.] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
RP Kragalott, M (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
EM mark.kragalott@nrl.navy.mil
NR 33
TC 4
Z9 4
U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-926X
EI 1558-2221
J9 IEEE T ANTENN PROPAG
JI IEEE Trans. Antennas Propag.
PD FEB
PY 2011
VL 59
IS 2
BP 443
EP 451
DI 10.1109/TAP.2010.2096403
PG 9
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 715YN
UT WOS:000286931700012
ER
PT J
AU Killian, TN
Rao, SM
Baginski, ME
AF Killian, Tyler N.
Rao, Sadasiva M.
Baginski, Michael E.
TI Electromagnetic Scattering From Electrically Large Arbitrarily-Shaped
Conductors Using the Method of Moments and a New Null-Field Generation
Technique
SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
LA English
DT Article
DE Fast method; large-body problems; method of moments (MoM); RWG basis
AB In this work, a new numerical procedure is developed to apply the well-known method of moments (MoM) formulation to electrically large conducting bodies of arbitrary shape. The numerical procedure involves developing a combination of subdomain-entire domain basis functions which result in a sparse moment matrix as opposed to a full matrix in the traditional method. Moreover, the zeros in the MoM matrix are precisely at the same locations where one would have encountered the most significant values. The solution of the new matrix may be obtained using the simple Gauss-Seidel iterative procedure with only two or three iterations. All the traditional advantages of the MoM procedure are retained including the solution for multiple incident fields. Several numerical results are presented to illustrate the validity of the new approach.
C1 [Killian, Tyler N.] Georgia Inst Technol, Signature Technol Lab, Atlanta, GA 30332 USA.
[Rao, Sadasiva M.] USN, Res Lab, Washington, DC 20375 USA.
[Baginski, Michael E.] Auburn Univ, Dept Elect & Comp Engn, Auburn, AL 36849 USA.
RP Killian, TN (reprint author), Georgia Inst Technol, Signature Technol Lab, Atlanta, GA 30332 USA.
EM tyler.killian@gtri.gatech.edu; sadasiva.rao@nrl.navy.mil
NR 9
TC 8
Z9 8
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-926X
J9 IEEE T ANTENN PROPAG
JI IEEE Trans. Antennas Propag.
PD FEB
PY 2011
VL 59
IS 2
BP 537
EP 545
DI 10.1109/TAP.2010.2096186
PG 9
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 715YN
UT WOS:000286931700022
ER
PT J
AU Amatucci, WE
Blackwell, DD
Tejero, EM
Cothran, CD
Rudakov, L
Ganguli, GI
Walker, DN
AF Amatucci, W. E.
Blackwell, David D.
Tejero, Erik M.
Cothran, Christopher D.
Rudakov, L.
Ganguli, Gurudas I.
Walker, David N.
TI Whistler Wave Resonances in Laboratory Plasma
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE Laboratory plasma; standing wave; whistler wave
ID CONE; RADIATION
AB Standing whistler wave patterns have been investigated in the Naval Research Laboratory's Space Physics Simulation Chamber. In the original experimental configuration, partial reflection of the antenna-launched whistler waves from the chamber end boundaries occurs, setting up a combination of standing and traveling waves. By controlling the axial magnetic field strength profile, cyclotron absorption of the whistler waves can be induced before reflection occurs, leaving only the forward propagating waves. By comparing standing-wave amplitudes to that when the wave is prevented from reflecting, cavity Q's in excess of 30 have been observed. Under uniform axial magnetic field conditions, the addition of planar conducting grids across the vacuum chamber cross section at the ends of the plasma column provides improved reflecting surfaces and corresponding increases in the value of Q.
C1 [Amatucci, W. E.; Blackwell, David D.; Ganguli, Gurudas I.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Tejero, Erik M.; Cothran, Christopher D.; Walker, David N.] Global Strategies Grp N Amer Inc, Crofton, MD 21114 USA.
[Rudakov, L.] Icarus Res Inc, Bethesda, MD 20824 USA.
RP Amatucci, WE (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM bill.amatucci@nrl.navy.mil
FU Office of Naval Research; Defense Advanced Research Projects Agency
FX This work was supported in part by the Office of Naval Research and in
part by the Defense Advanced Research Projects Agency.
NR 13
TC 7
Z9 7
U1 0
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0093-3813
EI 1939-9375
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD FEB
PY 2011
VL 39
IS 2
BP 637
EP 643
DI 10.1109/TPS.2010.2096235
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 717ZN
UT WOS:000287088000002
ER
PT J
AU Venn-Watson, SK
Jensen, ED
Ridgway, SH
AF Venn-Watson, Stephanie K.
Jensen, Eric D.
Ridgway, Sam H.
TI Evaluation of population health among bottlenose dolphins (Tursiops
truncatus) at the United States Navy Marine Mammal Program
SO JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION
LA English
DT Article
ID AGE STRUCTURE; SEA LIONS; MORTALITY; PATTERNS; GROWTH; RATES
AB Objective-To evaluate health indicators for a population of bottlenose dolphins in the US Navy Marine Mammal Program (MMP) by use of data acquired from 1988 through 2007.
Design-Retrospective cohort study.
Animals-167 bottlenose dolphins.
Procedures-The following indicators were used to evaluate the health of dolphins during the 20-year period: 5-year age structure, median survival age, annual survival rates, mortality rates, and neonatal and calf survival and mortality rates. Limitations of these population measurements as health indicators for dolphins were assessed.
Results-Crude mortality rates of dolphins for 1988 through 1992, 1993 through 1997, 1998 through 2002, and 2003 through 2007 were 3.1%, 4.7%, 3.6%, and 2.4%, respectively; during these same 4 study periods, median survival ages were 14.3, 14.4, 17.7, and 26.1 years, respectively, and mean survival rates were 0.98, 0.97, 0.97, and 0.99, respectively. From 1988 through 1997, 1998 through 2002, and 2003 through 2007, neonatal mortality rates were 4 of 16, 5 of 20, and 2 of 14 neonates, respectively. During these 3 study periods, mean annual survival rates for calves < 3 years old (excluding neonates that died at <= 30 days old) were 0.97 0.92, and 0.99, respectively.
Conclusions and Clinical Relevance-Although there were limitations to the measurement of some health indicators, use of multiple methods indicated that the health of dolphins in the MMP population was comparable to, if not better than, that published for other dolphin populations. The MMP population of dolphins may provide useful reference values of health indicators for use in assessment of other managed dolphin populations. (J Am Vet Med Assoc 2011;238:356-360)
C1 [Venn-Watson, Stephanie K.; Ridgway, Sam H.] Natl Marine Mammal Fdn, San Diego, CA 92106 USA.
[Jensen, Eric D.] USN, Marine Mammal Program, San Diego, CA 92106 USA.
RP Venn-Watson, SK (reprint author), Natl Marine Mammal Fdn, 2240 Shelter Isl Dr, San Diego, CA 92106 USA.
EM stephanie@epitracker.com
NR 25
TC 11
Z9 11
U1 0
U2 17
PU AMER VETERINARY MEDICAL ASSOC
PI SCHAUMBURG
PA 1931 N MEACHAM RD SUITE 100, SCHAUMBURG, IL 60173-4360 USA
SN 0003-1488
J9 JAVMA-J AM VET MED A
JI JAVMA-J. Am. Vet. Med. Assoc.
PD FEB 1
PY 2011
VL 238
IS 3
BP 356
EP 360
DI 10.2460/javma.238.3.356
PG 5
WC Veterinary Sciences
SC Veterinary Sciences
GA 712CR
UT WOS:000286642800045
PM 21281220
ER
PT J
AU Reddy, ALM
Kumar, A
Currano, LJ
Churaman, W
Dubey, M
Ajayan, PM
AF Reddy, Arava Leela Mohana
Kumar, Ashavani
Currano, Luke J.
Churaman, Wayne
Dubey, Madan
Ajayan, Pulickel M.
TI Thermal Decomposition Properties of NaClO4 Functionalized CNT Arrays
SO JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
LA English
DT Article
DE Multi-Walled Carbon Nanotubes (MWNT); Chemical Vapor Deposition; Thermal
Properties; Functionalization and Sodiumperchlorate
ID SINGLE-WALLED NANOTUBES; CARBON NANOTUBES; COMPOSITE; NANOCRYSTALLINE;
MANAGEMENT
AB Aligned CNT mats were prepared by thermal chemical vapor deposition (CVD) method by exposing a mixture of ferrocene and xylene vapor to the SiO2/Si substrates. Aligned CNT mats functionalized with reactive chemicals without disturbing CNT alignment were characterized by SEM, XRD, FT-IR, FT-Raman and XPS. The thermal stability of the CNT, CNT-OH and CNT-NaClO4 are investigated using TG-DSC analysis. Oxidation and combustion temperatures of CNT mats were found to be decreased by functionalizing the CNT mats with NaClO4.
C1 [Reddy, Arava Leela Mohana; Kumar, Ashavani; Ajayan, Pulickel M.] Rice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77005 USA.
[Currano, Luke J.; Churaman, Wayne; Dubey, Madan] USN, Res Lab, Adelphi, MD 20783 USA.
RP Reddy, ALM (reprint author), Rice Univ, Dept Mech Engn & Mat Sci, 6100 Main St, Houston, TX 77005 USA.
RI Arava, Leela Mohana Reddy/J-3180-2015
FU US Army Research Laboratory; Rice University
FX The authors acknowledge funding support from the US Army Research
Laboratory and Rice University.
NR 20
TC 0
Z9 0
U1 0
U2 4
PU AMER SCIENTIFIC PUBLISHERS
PI VALENCIA
PA 26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA
SN 1533-4880
J9 J NANOSCI NANOTECHNO
JI J. Nanosci. Nanotechnol.
PD FEB
PY 2011
VL 11
IS 2
BP 1111
EP 1116
DI 10.1166/jnn.2011.3054
PG 6
WC Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials
Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 718ZZ
UT WOS:000287167900029
PM 21456147
ER
PT J
AU Liacouras, P
Garnes, J
Roman, N
Petrich, A
Grant, GT
AF Liacouras, Peter
Garnes, Jonathan
Roman, Norberto
Petrich, Anton
Grant, Gerald T.
TI DESIGNING AND MANUFACTURING AN AURICULAR PROSTHESIS USING COMPUTED
TOMOGRAPHY, 3-DIMENSIONAL PHOTOGRAPHIC IMAGING, AND ADDITIVE
MANUFACTURING: A CLINICAL REPORT
SO JOURNAL OF PROSTHETIC DENTISTRY
LA English
DT Article
ID DEVELOPING FACIAL PROSTHESES; CAD/CAM TECHNIQUES; FABRICATION; EAR;
INTEGRATION; CAD
AB The method of fabricating an auricular prosthesis by digitally positioning a mirror image of the soft tissue, then designing and using rapid prototyping to produce the mold, can reduce the steps and time needed to create a prosthesis by the traditional approach of sculpting either wax or clay. The purpose of this clinical report is to illustrate how the use of 3-dimensional (3-D) photography, computer technology, and additive manufacturing can extensively reduce many of the preliminary procedures currently used to create an auricular prosthesis. (J Prosthet Dent 2011;105:78-82)
C1 [Liacouras, Peter] Walter Reed Army Med Ctr, Med Applicat Ctr 3D, Dept Radiol, Washington, DC 20307 USA.
[Petrich, Anton] USN, Sch Postgrad Dent, Natl Naval Med Ctr, Maxillofacial Prosthet Dept, Bethesda, MD 20084 USA.
[Grant, Gerald T.] Natl Naval Med Ctr, Dept Radiol, Bethesda, MD USA.
RP Liacouras, P (reprint author), Walter Reed Army Med Ctr, Med Applicat Ctr 3D, Dept Radiol, Bldg 2,Room 1X36,6900 Georgia Ave, Washington, DC 20307 USA.
EM Peter.liacouras@amedd.army.mil
NR 11
TC 18
Z9 22
U1 2
U2 23
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0022-3913
J9 J PROSTHET DENT
JI J. Prosthet. Dent.
PD FEB
PY 2011
VL 105
IS 2
BP 78
EP 82
DI 10.1016/S0022-3913(11)60002-4
PG 5
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 727GC
UT WOS:000287784900002
PM 21262404
ER
PT J
AU Wu, C
Rogers, D
Olson, G
Cerilli, L
AF Wu, C.
Rogers, D.
Olson, G.
Cerilli, L.
TI Development of a Comprehensive Surgical Pathology Website for Teaching
and Self-Assessment at the Resident and Clinical Practice Level
SO LABORATORY INVESTIGATION
LA English
DT Meeting Abstract
CT 100th Annual Meeting of the United States and
Canadian-Academy-of-Pathology
CY FEB 26-MAR 04, 2011
CL San Antonio, TX
SP Canadian Acad Pathol
C1 Univ New Mexico, Albuquerque, NM 87131 USA.
USN, Hosp Pensacola, Pensacola, FL USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 0023-6837
J9 LAB INVEST
JI Lab. Invest.
PD FEB
PY 2011
VL 91
SU 1
MA 555
BP 133A
EP 133A
PG 1
WC Medicine, Research & Experimental; Pathology
SC Research & Experimental Medicine; Pathology
GA 716ZG
UT WOS:000287011400557
ER
PT J
AU Brown, GG
Cox, LA
AF Brown, Gerald G.
Cox, Louis Anthony (Tony), Jr.
TI Making Terrorism Risk Analysis Less Harmful and More Useful: Another Try
Response
SO RISK ANALYSIS
LA English
DT Letter
C1 [Brown, Gerald G.] USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
RP Brown, GG (reprint author), USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
EM ggbrown@nps.navy.mil; TCoxDenver@aol.com
NR 6
TC 6
Z9 6
U1 1
U2 9
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0272-4332
EI 1539-6924
J9 RISK ANAL
JI Risk Anal.
PD FEB
PY 2011
VL 31
IS 2
BP 193
EP 195
DI 10.1111/j.1539-6924.2010.01563.x
PG 3
WC Public, Environmental & Occupational Health; Mathematics,
Interdisciplinary Applications; Social Sciences, Mathematical Methods
SC Public, Environmental & Occupational Health; Mathematics; Mathematical
Methods In Social Sciences
GA 727BH
UT WOS:000287771800003
ER
PT J
AU Brown, GG
Cox, LA
AF Brown, Gerald G.
Cox, Louis Anthony (Tony), Jr.
TI How Probabilistic Risk Assessment Can Mislead Terrorism Risk Analysts
SO RISK ANALYSIS
LA English
DT Article
DE Decision analysis; expert elicitation; terrorism risk analysis
AB Traditional probabilistic risk assessment (PRA), of the type originally developed for engineered systems, is still proposed for terrorism risk analysis. We show that such PRA applications are unjustified in general. The capacity of terrorists to seek and use information and to actively research different attack options before deciding what to do raises unique features of terrorism risk assessment that are not adequately addressed by conventional PRA for natural and engineered systems-in part because decisions based on such PRA estimates do not adequately hedge against the different probabilities that attackers may eventually act upon. These probabilities may differ from the defender's (even if the defender's experts are thoroughly trained, well calibrated, unbiased probability assessors) because they may be conditioned on different information. We illustrate the fundamental differences between PRA and terrorism risk analysis, and suggest use of robust decision analysis for risk management when attackers may know more about some attack options than we do.
C1 [Cox, Louis Anthony (Tony), Jr.] Cox Associates, Denver, CO 80218 USA.
[Brown, Gerald G.] USN, Postgrad Sch, Dept Operat Res, Monterey, CA USA.
RP Cox, LA (reprint author), Cox Associates, 503 Franklin St, Denver, CO 80218 USA.
EM TCoxDenver@aol.com
NR 9
TC 29
Z9 29
U1 2
U2 12
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0272-4332
J9 RISK ANAL
JI Risk Anal.
PD FEB
PY 2011
VL 31
IS 2
BP 196
EP 204
DI 10.1111/j.1539-6924.2010.01492.x
PG 9
WC Public, Environmental & Occupational Health; Mathematics,
Interdisciplinary Applications; Social Sciences, Mathematical Methods
SC Public, Environmental & Occupational Health; Mathematics; Mathematical
Methods In Social Sciences
GA 727BH
UT WOS:000287771800004
PM 20846169
ER
PT J
AU Tsai, HC
Lu, KC
Elsberry, RL
Lu, MM
Sui, CH
AF Tsai, Hsiao-Chung
Lu, Kuo-Chen
Elsberry, Russell L.
Lu, Mong-Ming
Sui, Chung-Hsiung
TI Tropical Cyclone-like Vortices Detection in the NCEP 16-Day Ensemble
System over the Western North Pacific in 2008: Application and Forecast
Evaluation
SO WEATHER AND FORECASTING
LA English
DT Article
ID EXTRATROPICAL TRANSITION; INITIAL PERTURBATIONS; PREDICTION SYSTEMS;
CLIMATE MODEL; ATLANTIC; FREQUENCY; CYCLOGENESIS; CIRCULATION;
SIMULATION; HEMISPHERE
AB An automated technique has been developed for the detection and tracking of tropical cyclone like vortices (TCLVs) in numerical weather prediction models, and especially for ensemble-based models. A TCLV is detected in the model grid when selected dynamic and thermodynamic fields meet specified criteria. A backward-and-forward extension from the mature stage of the track is utilized to complete the track. In addition, a fuzzy logic approach is utilized to calculate the TCLV fuzzy combined-likelihood value (TFCV) for representing the TCLV characteristics in the ensemble forecast outputs. The primary objective of the TCLV tracking and TFCV maps is for use as an evaluation tool for the operational forecasters. It is demonstrated that this algorithm efficiently extracts western North Pacific TCLV information from the vast amount of ensemble data from the NCEP Global Ensemble Forecast System (GEFS). The predictability of typhoon formation and activity during June December 2008 is also evaluated. The TCLV track numbers and TFCV averages around the formation locations during the 0-96-h period are more skillful than for the 102-384-h forecasts. Compared to weak tropical cyclones (TCs; maximum intensity <= 50 kt), the storms that eventually become stronger TCs do have larger TFCVs. Depending on the specified domain size and the ensemble track numbers to define a forecast event, some skill is indicated in predicting the named TC activity. Although this evaluation with the 2008 typhoon season indicates some potential, an evaluation with a larger sample is necessary to statistically verify the reliability of the GEFS forecasts.
C1 [Tsai, Hsiao-Chung; Lu, Kuo-Chen; Lu, Mong-Ming] Cent Weather Bur, Weather Forecast Ctr, Taipei 10048, Taiwan.
[Elsberry, Russell L.] USN, Postgrad Sch, Dept Meteorol, Grad Sch Engn & Appl Sci, Monterey, CA 93943 USA.
[Sui, Chung-Hsiung] Natl Cent Univ, Inst Hydrol & Ocean Sci, Jhongli, Taiwan.
[Sui, Chung-Hsiung] Natl Cent Univ, Dept Atmospher Sci, Jhongli, Taiwan.
RP Lu, KC (reprint author), Cent Weather Bur, Weather Forecast Ctr, 64 Gongyuan Rd, Taipei 10048, Taiwan.
EM gcleu@cwb.gov.tw
OI SUI, CHUNG-HSIUNG/0000-0003-2842-5660
NR 43
TC 4
Z9 5
U1 1
U2 5
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0882-8156
J9 WEATHER FORECAST
JI Weather Forecast.
PD FEB
PY 2011
VL 26
IS 1
BP 77
EP 93
DI 10.1175/2010WAF2222415.1
PG 17
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 725FR
UT WOS:000287631100005
ER
PT J
AU Pande, CS
Cooper, KP
AF Pande, C. S.
Cooper, K. P.
TI On the analytical solution for self-similar grain size distributions in
two dimensions
SO ACTA MATERIALIA
LA English
DT Article
DE Grain size distribution; Grain growth; Stochastic model
ID STOCHASTIC-THEORY; GROWTH; EVOLUTION; FILMS
AB In a recent publication an analytical solution of the Fokker-Planck continuity equation for the grain size distribution for two-dimensional grain growth in the long time limit (self-similar state) was provided. It used von Neumann-Mullins law and the results of Rios and Glicksman, but was based on a stochastic formulation first proposed by Pande. In this paper this analytical solution is compared with experimental and computer simulation distributions. It is found that grain size distribution, as obtained by simulations of two-dimensional grain growth, although in agreement with our analytical results, may in fact differ from experimentally obtained grain size distributions in thin films. It is also shown mathematically that in the two limiting cases the general solution is reduced to the Hillert or Rayleigh distributions. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
C1 [Pande, C. S.; Cooper, K. P.] USN, Res Lab, Washington, DC 20375 USA.
RP Cooper, KP (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM khershed.cooper@nrl.navy.mil
NR 26
TC 2
Z9 3
U1 0
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
EI 1873-2453
J9 ACTA MATER
JI Acta Mater.
PD FEB
PY 2011
VL 59
IS 3
BP 955
EP 961
DI 10.1016/j.actamat.2010.10.019
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 712TW
UT WOS:000286690100010
ER
PT J
AU Slabaugh, MMA
Frank, RM
Van Thiel, GS
Bell, RM
Wang, VM
Trenhaile, S
Provencher, MT
Romeo, AA
Verma, NN
AF Slabaugh, Maj Mark A.
Frank, Rachel M.
Van Thiel, Geoffrey S.
Bell, Rebecca M.
Wang, Vincent M.
Trenhaile, Scott
Provencher, Matthew T.
Romeo, Anthony A.
Verma, Nikhil N.
TI Biceps Tenodesis With Interference Screw Fixation: A Biomechanical
Comparison of Screw Length and Diameter
SO ARTHROSCOPY-THE JOURNAL OF ARTHROSCOPIC AND RELATED SURGERY
LA English
DT Article
ID LONG-HEAD; PORCINE MODEL; FIT FIXATION; TENDON; BRACHII; TENOTOMY;
STRENGTH; REPAIR
AB Purpose: To evaluate the effect of screw length and diameter on the mechanical properties of biceps tenodesis (BT) with an interference screw in 2 different locations (proximal and distal). Methods: We randomized 42 fresh-frozen human cadaveric shoulders (mean age, 65 8 years) into 6 groups (n = 7): arthroscopic proximal BT using 7 x 15-, 7 x 25-, 8 x 15-, or 8 x 25-mm interference screws or distal subpectoral BT with 7 x 15-or 8 x 15-mm interference screws. Each repaired specimen was mounted onto a materials testing machine, preloaded to 5 N for 2 minutes, cycled from 5 to 70 N for 500 cycles (1 Hz), and loaded to failure (1 mm/s). Displacement during cyclical loading, pullout stiffness, and ultimate load to failure were computed, and the mechanism of failure was noted. Results: All failures occurred at the tendon-screw interface. There was no statistically significant difference in ultimate displacement among all groups in the ultimate load to failure, displacement at peak load, and stiffness. Conclusions: There is no difference in ultimate load to failure, displacement at peak load, and stiffness of BT with regard to screw length or diameter at both proximal and distal tenodesis locations. These data would support use of a smaller-diameter and shorter implant for BT both proximally and distally. Clinical Relevance: The results may serve as a guide to the orthopaedic surgeon performing proximal BT in selecting the appropriate interference screw. When possible, we recommend using the smallest screw size available to minimize risk of stress fracture at the tenodesis site.
C1 [Slabaugh, Maj Mark A.; Frank, Rachel M.; Van Thiel, Geoffrey S.; Bell, Rebecca M.; Wang, Vincent M.; Romeo, Anthony A.; Verma, Nikhil N.] Rush Univ, Med Ctr, Dept Orthoped Surg, Rush Med Coll,Div Sports Med, Chicago, IL 60612 USA.
[Trenhaile, Scott] Rockford Orthoped Associates, Rockford, IL USA.
[Provencher, Matthew T.] USN, Med Ctr, Div Shoulder & Sports Surg, Dept Orthopaed Surg, San Diego, CA USA.
RP Verma, NN (reprint author), Rush Univ, Med Ctr, Dept Orthoped Surg, Rush Med Coll,Div Sports Med, 1725 W Harrison Ave,Ste 1063, Chicago, IL 60612 USA.
EM nverma@rushortho.com
OI Frank, Rachel/0000-0002-1120-0521; Romeo, Anthony/0000-0003-4848-3411
FU Arthrex, Naples, Florida
FX The specimens and implants were provided by Smith & Nephew, Andover,
Massachusetts. N.N.V. is a consultant and receives research support from
Smith & Nephew. A.A.R. is a consultant and receives research support
from Arthrex, Naples, Florida. The other authors report no conflict of
interest.
NR 25
TC 23
Z9 24
U1 2
U2 4
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 0749-8063
J9 ARTHROSCOPY
JI Arthroscopy
PD FEB
PY 2011
VL 27
IS 2
BP 161
EP 166
DI 10.1016/j.arthro.2010.07.004
PG 6
WC Orthopedics; Surgery
SC Orthopedics; Surgery
GA 709SD
UT WOS:000286460800005
PM 21030205
ER
PT J
AU Anderson, GE
Gaensler, BM
Kaplan, DL
Posselt, B
Slane, PO
Murray, SS
Mauerhan, JC
Benjamin, RA
Brogan, CL
Chakrabarty, D
Drake, JJ
Drew, JE
Grindlay, JE
Hong, J
Lazio, TJW
Lee, JC
Steeghs, DTH
van Kerkwijk, MH
AF Anderson, Gemma E.
Gaensler, B. M.
Kaplan, David L.
Posselt, Bettina
Slane, Patrick O.
Murray, Stephen S.
Mauerhan, Jon C.
Benjamin, Robert A.
Brogan, Crystal L.
Chakrabarty, Deepto
Drake, Jeremy J.
Drew, Janet E.
Grindlay, Jonathan E.
Hong, Jaesub
Lazio, T. Joseph W.
Lee, Julia C.
Steeghs, Danny T. H.
van Kerkwijk, Marten H.
TI IDENTIFICATION OF A POPULATION OF X-RAY-EMITTING MASSIVE STARS IN THE
GALACTIC PLANE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE stars: winds, outflows; stars: Wolf-Rayet; supergiants; X-rays:
binaries; X-rays: individual (AX J163252-4746, AX J184738-0156, AX
J144701-5919, AX J144547-5931); X-rays: stars
ID H-II REGIONS; CARINA OB1 ASSOCIATION; RADIO-EMISSION MODELS; WIND
BINARY-SYSTEMS; COLLIDING WINDS; NONTHERMAL EMISSION; SOURCE CATALOG;
VIITH CATALOG; INNER GALAXY; HOT STARS
AB We present X-ray, infrared, optical, and radio observations of four previously unidentified Galactic plane X-ray sources: AX J163252-4746, AX J184738-0156, AX J144701-5919, and AX J144547-5931. Detection of each source with the Chandra X-ray Observatory has provided sub-arcsecond localizations, which we use to identify bright infrared counterparts to all four objects. Infrared and optical spectroscopy of these counterparts demonstrate that all four X-ray sources are extremely massive stars, with spectral classifications: Ofpe/WN9 (AX J163252-4746), WN7 (AX J184738-0156 = WR121a), WN7-8h (AX J144701-5919), and OIf(+) (AX J144547-5931). AX J163252-4746 and AX J184738-0156 are both luminous, hard, X-ray emitters with strong Fe XXV emission lines in their X-ray spectra at similar to 6.7 keV. The multi-wavelength properties of AX J163252-4746 and AX J184738-0156 are not consistent with isolated massive stars or accretion onto a compact companion; we conclude that their X-ray emission is most likely generated in a colliding-wind binary (CWB) system. For both AX J144701-5919 and AX J144547-5931, the X-ray emission is an order of magnitude less luminous and with a softer spectrum. These properties are consistent with a CWB interpretation for these two sources also, but other mechanisms for the generation of X-rays cannot be excluded. There are many other as yet unidentified X-ray sources in the Galactic plane, with X-ray properties similar to those seen for AX J163252-4746, AX J184738-0156, AX J144701-5919, and AX J144547-5931. This may indicate a substantial population of X-ray-emitting massive stars and CWBs in the Milky Way.
C1 [Anderson, Gemma E.; Gaensler, B. M.] Univ Sydney, Sydney Inst Astron, Sch Phys A29, Sydney, NSW 2006, Australia.
[Kaplan, David L.] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA.
[Posselt, Bettina; Slane, Patrick O.; Murray, Stephen S.; Drake, Jeremy J.; Grindlay, Jonathan E.; Hong, Jaesub; Lee, Julia C.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Mauerhan, Jon C.] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA.
[Benjamin, Robert A.] Univ Wisconsin, Dept Phys, Whitewater, WI 53190 USA.
[Brogan, Crystal L.] Natl Radio Astron Observ, Charlottesville, VA 22903 USA.
[Chakrabarty, Deepto] MIT, MIT Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.
[Chakrabarty, Deepto] MIT, Dept Phys, Cambridge, MA 02139 USA.
[Drew, Janet E.] Univ Hertfordshire, STRI, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England.
[Lazio, T. Joseph W.] USN, Res Lab, Washington, DC 20375 USA.
[Steeghs, Danny T. H.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[van Kerkwijk, Marten H.] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada.
RP Anderson, GE (reprint author), Univ Sydney, Sydney Inst Astron, Sch Phys A29, Sydney, NSW 2006, Australia.
EM g.anderson@physics.usyd.edu.au
RI Steeghs, Danny/C-5468-2009; Gaensler, Bryan/F-8655-2010; Lee,
Julia/G-2381-2015;
OI Steeghs, Danny/0000-0003-0771-4746; Lee, Julia/0000-0002-7336-3588;
Anderson, Gemma/0000-0001-6544-8007; Posselt,
Bettina/0000-0003-2317-9747; Gaensler, Bryan/0000-0002-3382-9558; Drew,
Janet/0000-0003-1192-7082
FU Australian Postgraduate Award; Australian Research Council [FF0561298];
NASA, STScI [51230.01-A, NAS 5-26555]; NASA [NAS8-03060, NAS8-39073,
GO9-0155X]; STFC; NRL; Commonwealth of Australia for operation; NFS
FX Special thanks goes to Michael Muno for his encouragement, expertise,
and participation in this project. We also thank Sean Farrell, Stan
Owocki, and Nathan Smith for their advice and help with this research
and the referee for his or her constructive response and suggestions. G.
E. A acknowledges the support of an Australian Postgraduate Award. B. M.
G. acknowledges the support of a Federation Fellowship from the
Australian Research Council through grant FF0561298. D. L. K. was
supported by NASA through Hubble Fellowship grant 51230.01-A awarded by
the STScI, which is operated by AURA, for NASA, under contract NAS
5-26555. P.O.S. acknowledges partial support from NASA Contract
NAS8-03060. D. T. H. S. acknowledges an STFC Advanced Fellowship. J.J.D
was supported by NASA contract NAS8-39073 to the Chandra X-ray Center
(CXC). Basic research in radio astronomy at the NRL is supported by 6.1
Base funding. Support for this work was also provided by NASA through
Chandra Award Number GO9-0155X issued by the CXC, which is operated by
the Smithsonian Astrophysical Observatory for and on behalf of NASA.
This research makes use of data obtained with the Chandra X-ray
Observatory, and software provided by the CXC in the application
packages CIAO and Sherpa. OSIRIS is a collaborative project between Ohio
State University and CTIO. Observing time on the 6.5m Clay and Baade
Magellan Telescopes, located at Las Campanas Observatory, was allocated
through the Harvard-Smithsonian Center for Astrophysics. The ATCA, part
of the Australia Telescope, is funded by the Commonwealth of Australia
for operation as a National Facility managed by CSIRO. This publication
makes use of data products from the second catalogue of serendipitous
X-ray sources (2XMMi) from the European Space Agency's (ESA) XMM-Newton
observatory. These data were accessed through the Leicester Database and
Archive Service at Leicester University, UK. 2MASS is a joint project of
the University of Massachusetts and the IPAC/Caltech, funded by the NASA
and NFS. GLIMPSE survey data are part of the Spitzer Legacy Program. The
Spitzer Space Telescope is operated by the JPL/Caltech under a contract
with NASA. This research has made use of NASA's Astrophysics Data
System.
NR 88
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PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 1
PY 2011
VL 727
IS 2
AR 105
DI 10.1088/0004-637X/727/2/105
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 712JE
UT WOS:000286662000044
ER
PT J
AU Kraemer, SB
Schmitt, HR
Crenshaw, DM
Melendez, M
Turner, TJ
Guainazzi, M
Mushotzky, RF
AF Kraemer, S. B.
Schmitt, H. R.
Crenshaw, D. M.
Melendez, M.
Turner, T. J.
Guainazzi, M.
Mushotzky, R. F.
TI MULTI-WAVELENGTH PROBES OF OBSCURATION TOWARD THE NARROW-LINE REGION IN
SEYFERT GALAXIES
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: Seyfert
ID ACTIVE GALACTIC NUCLEI; HIGH-RESOLUTION SPECTROSCOPY; INFRARED-SELECTED
SAMPLE; SPACE-TELESCOPE SURVEY; X-RAY-EMISSION; PHYSICAL CONDITIONS;
NEARBY GALAXIES; SPITZER-IRS; MU-M; CIRCUMNUCLEAR DUST
AB We present a study of reddening and absorption toward the narrow line regions (NLRs) in active galactic nuclei (AGNs) selected from the Revised Shapley-Ames, 12 mu m, and Swift/Burst Alert Telescope samples. For the sources in host galaxies with inclinations of b/a > 0.5, we find that the mean ratio of [O III] lambda 5007, from ground-based observations, and [O IV] 28.59 mu m, from Spitzer/Infrared Spectrograph observations, is a factor of two lower in Seyfert 2s than Seyfert 1s. The combination of low [O III]/[O IV] and [O III] lambda 4363/lambda 5007 ratios in Seyfert 2s suggests more extinction of emission from the NLR than in Seyfert 1s. Similar column densities of dusty gas, N-H similar to several x 10(21) cm(-2), can account for the suppression of both [O III] lambda 5007 and [O III] lambda 4363, as compared to those observed in Seyfert 1s. Also, we find that the X-ray line O VII lambda 22.1 angstrom is weaker in Seyfert 2s, consistent with absorption by the same gas that reddens the optical emission. Using a Hubble Space Telescope/Space Telescope Imaging Spectrograph slitless spectrum of the Seyfert 1 galaxy NGC 4151, we estimate that only similar to 30% of the [O III] lambda 5007 comes from within 30 pc of the central source, which is insufficient to account for the low [O III]/[O IV] ratios in Seyfert 2s. If Seyfert 2 galaxies have similar intrinsic [O III] spatial profiles, the external dusty gas must extend further out along the NLR, perhaps in the form of nuclear dust spirals that have been associated with fueling flows toward the AGN.
C1 [Kraemer, S. B.] Catholic Univ Amer, Dept Phys, Inst Astrophys & Computat Sci, Washington, DC 20064 USA.
[Kraemer, S. B.] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
[Schmitt, H. R.] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
[Schmitt, H. R.] Computat Phys Inc, Springfield, VA 22151 USA.
[Crenshaw, D. M.] Georgia State Univ, Astron Off, Dept Phys & Astron, Atlanta, GA 30303 USA.
[Melendez, M.] Johns Hopkins Univ, Henry A Rowland Dept Phys & Astron, Baltimore, MD 21218 USA.
[Turner, T. J.] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
[Guainazzi, M.] European Space Agcy, European Space Astron Ctr, E-28691 Madrid, Spain.
[Mushotzky, R. F.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
RP Kraemer, SB (reprint author), Catholic Univ Amer, Dept Phys, Inst Astrophys & Computat Sci, Washington, DC 20064 USA.
FU NRL; National Aeronautics and Space Administration
FX Basic research in Astronomy at the NRL is supported by 6.1 base funding.
This research has made use of the NASA/IPAC Extragalactic Database (NED)
which is operated by the Jet Propulsion Laboratory, California Institute
of Technology, under contract with the National Aeronautics and Space
Administration. We thank Juliette Buet for her assistance with this
project. We thank an anonymous referee for valuable suggestions.
NR 114
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 1
PY 2011
VL 727
IS 2
AR 130
DI 10.1088/0004-637X/727/2/130
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 712JE
UT WOS:000286662000069
ER
PT J
AU Wik, DR
Sarazin, CL
Finoguenov, A
Baumgartner, WH
Mushotzky, RF
Okajima, T
Tueller, J
Clarke, TE
AF Wik, Daniel R.
Sarazin, Craig L.
Finoguenov, Alexis
Baumgartner, Wayne H.
Mushotzky, Richard F.
Okajima, Takashi
Tueller, Jack
Clarke, Tracy E.
TI THE LACK OF DIFFUSE, NON-THERMAL HARD X-RAY EMISSION IN THE COMA
CLUSTER: THE SWIFT BURST ALERT TELESCOPE'S EYE VIEW
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: clusters: general; galaxies: clusters: individual (Coma);
intergalactic medium; magnetic fields; radiation mechanisms:
non-thermal; X-rays: galaxies: clusters
ID OPHIUCHUS GALAXY CLUSTER; MAGNETIC-FIELD; XMM-NEWTON; COSMOLOGICAL
SIMULATIONS; SPATIAL-DISTRIBUTION; INTEGRAL IBIS/ISGRI;
FARADAY-ROTATION; CRAB-NEBULA; ENERGY; SPECTRUM
AB The Coma Cluster of galaxies hosts the brightest radio halo known and has therefore been the target of numerous searches for associated inverse Compton (IC) emission, particularly at hard X-ray energies where the IC signal must eventually dominate over thermal emission. The most recent search with the Suzaku Hard X-ray Detector failed to confirm previous IC detections with RXTE and BeppoSAX, instead setting an upper limit 2.5 times below their non-thermal flux. However, this discrepancy can be resolved if the IC emission is very extended, beyond the scale of the cluster radio halo. Using reconstructed sky images from the 58-month Swift Burst Alert Telescope (BAT) all-sky survey, the feasibility of such a solution is investigated. Building on Renaud et al., we test and implement a method for extracting the fluxes of extended sources, assuming specified spatial distributions. BAT spectra are jointly fit with an XMM-Newton EPIC-pn spectrum derived from mosaic observations. We find no evidence for large-scale IC emission at the level expected from the previously detected non-thermal fluxes. For all non-thermal spatial distributions considered, which span the gamut of physically reasonable IC models, we determine upper limits for which the largest (most conservative) limit is less than or similar to 4.2x10(-12) erg s(-1) cm(-2) (20-80 keV), which corresponds to a lower limit on the magnetic field B > 0.2 mu G. A nominal flux upper limit of <2.7x10(-12) erg s(-1) cm(-2), with corresponding B > 0.25 mu G, is derived for the most probable IC distribution given the size of the radio halo and likely magnetic field radial profile.
C1 [Wik, Daniel R.; Baumgartner, Wayne H.; Okajima, Takashi; Tueller, Jack] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, High Energy Astrophys Lab, Greenbelt, MD 20771 USA.
[Sarazin, Craig L.] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.
[Finoguenov, Alexis] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Finoguenov, Alexis] Univ Maryland, Baltimore, MD 21250 USA.
[Mushotzky, Richard F.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Clarke, Tracy E.] USN, Res Lab, Washington, DC 20375 USA.
RP Wik, DR (reprint author), NASA, Goddard Space Flight Ctr, Astrophys Sci Div, High Energy Astrophys Lab, Code 662, Greenbelt, MD 20771 USA.
EM daniel.r.wik@nasa.gov
RI Tueller, Jack/D-5334-2012; XRAY, SUZAKU/A-1808-2009
FU University of Virginia; NASA [NNX08AZ99G, NNX09AH25G, NNX09AH74G,
NNX08AZ34G, NNX08AW83G]; Basic research in radio astronomy at the NRL
FX We thank W. Reich who kindly provided us with the Deiss et al. (1997)
radio image, C. B. Markwardt who explained to us (and wrote) many of the
BAT software analysis routines used in this work, D. Kushnir and E.
Waxman for helpful comments and pointing out a small error, and the
referee D. Eckert for helpful comments that particularly improved the
clarity of the paper. D. R. W. was supported by a University of Virginia
GSAS Dissertation Year Fellowship and a Virginia Space Grant Consortium
Fellowship. D. R. W. and C. L. S. were supported in part by NASA through
Suzaku grants NNX08AZ99G, NNX09AH25G, and NNX09AH74G, and XMM-Newton
grants NNX08AZ34G and NNX08AW83G. Basic research in radio astronomy at
the NRL is supported by 6.1 Base funding.
NR 52
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U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 1
PY 2011
VL 727
IS 2
AR 119
DI 10.1088/0004-637X/727/2/119
PG 17
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 712JE
UT WOS:000286662000058
ER
PT J
AU Kao, CH
Robertson, C
Kragh, F
Lin, K
AF Kao, Chi-Han
Robertson, Clark
Kragh, Frank
Lin, Kyle
TI Performance analysis and simulations of 32-ary cyclic code-shift keying
SO INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS
LA English
DT Article
DE cyclic code-shift keying (CCSK); joint tactical information distribution
system (JTIDS); link-16
AB Cyclic code-shift keying (CCSK) is the baseband 32-ary symbol modulation scheme used by the Joint Tactical Information Distribution System (JTIDS), the communication terminal for Link-16. CCSK is not orthogonal and an analytic expression for the probability of symbol error for CCSK has thus far been elusive. In this paper, an analytic upper bound on the probability of symbol error of CCSK is derived for the 32-chip CCSK starting sequence chosen for JTIDS. The analytically obtained probability of symbol error is compared with two different Monte Carlo simulations for additive white Gaussian noise. The results of both simulations match the analytic results very well and show that the analytic method yields a tight upper bound. A new 32-chip CCSK starting sequence which has a smaller maximum off-peak cross-correlation value than the current JTIDS starting sequence is proposed and evaluated both analytically and by simulation. The results obtained for the new CCSK starting sequence compare favorably with the CCSK starting sequence chosen for JTIDS. Published in 2010 by John Wiley & Sons, Ltd.
C1 [Robertson, Clark; Kragh, Frank] USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
[Kao, Chi-Han] Chinese Naval Acad, Dept Elect Engn, Kaohsiung 81300, Taiwan.
[Lin, Kyle] USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
RP Kragh, F (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
EM frank.kragh@ieee.org
OI Lin, Kyle/0000-0002-3769-1891
NR 13
TC 2
Z9 2
U1 0
U2 5
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1074-5351
J9 INT J COMMUN SYST
JI Int. J. Commun. Syst.
PD FEB
PY 2011
VL 24
IS 2
BP 258
EP 268
DI 10.1002/dac.1153
PG 11
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 718YB
UT WOS:000287161400008
ER
PT J
AU Hair, LC
Deyle, G
AF Hair, Leslie C.
Deyle, Gail
TI Eosinophilic Granuloma in a Patient With Hip Pain
SO JOURNAL OF ORTHOPAEDIC & SPORTS PHYSICAL THERAPY
LA English
DT Editorial Material
C1 [Hair, Leslie C.] USN, Special Warfare Grp 4, Virginia Beach, VA USA.
[Deyle, Gail] Baylor Univ, Grad Sch, Ft Sam Houston, TX USA.
[Deyle, Gail] Army Baylor Univ, Ft Sam Houston, TX USA.
[Deyle, Gail] Brooke Army Med Ctr, Ft Sam Houston, TX 78234 USA.
RP Hair, LC (reprint author), USN, Special Warfare Grp 4, Virginia Beach, VA USA.
NR 0
TC 1
Z9 1
U1 0
U2 1
PU J O S P T,
PI ALEXANDRIA
PA 1111 NORTH FAIRFAX ST, STE 100, ALEXANDRIA, VA 22314-1436 USA
SN 0190-6011
J9 J ORTHOP SPORT PHYS
JI J. Orthop. Sports Phys. Ther.
PD FEB
PY 2011
VL 41
IS 2
BP 119
EP 119
DI 10.2519/jospt.2011.0404
PG 1
WC Orthopedics; Rehabilitation; Sport Sciences
SC Orthopedics; Rehabilitation; Sport Sciences
GA 718ZG
UT WOS:000287164600012
PM 21285527
ER
PT J
AU Bradshaw, R
Wolstenholme, R
Blackledge, RD
Clench, MR
Ferguson, LS
Francese, S
AF Bradshaw, Robert
Wolstenholme, Rosalind
Blackledge, Robert D.
Clench, Malcolm R.
Ferguson, Leesa S.
Francese, Simona
TI A novel matrix-assisted laser desorption/ionisation mass spectrometry
imaging based methodology for the identification of sexual assault
suspects
SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY
LA English
DT Article
ID DUSTED LATENT FINGERMARKS; PERSONAL LUBRICANTS; FORENSIC ANALYSIS;
CONDOM; SURFACTANTS; CASEWORK; SAMPLES; DRUGS; TIME; MS
AB An increase in the use of condoms by sexual offenders has been observed. This is likely to be due both to the risk of sexually transmitted diseases and to prevent the transfer of DNA evidence. In this scenario the detection of condom lubricants at a crime scene could aid in proving corpus delicti. Here we show a novel application of Matrix-Assisted Laser Desorption/Ionisation Mass Spectrometry Imaging (MALDI MSI) for mapping the fingermark ridge pattern simultaneously to the detection of the condom lubricant within the fingermark itself. Two condom brands have been investigated to prove the concept. Condoms were handled producing lubricant-contaminated fingermarks. Images of the ridge pattern were obtained simultaneously to the detection of two lubricants, even several weeks after the fingermark deposition. The results therefore show the potential of MALDI MSI to link the suspect (identification through fingermark ridge pattern) to the crime (detection of condom lubricant) in one analysis. This would enable forensic scientists to provide evidence with stronger support in alleged cases of sexual assault. Copyright (C) 2011 John Wiley & Sons, Ltd.
C1 [Bradshaw, Robert; Wolstenholme, Rosalind; Clench, Malcolm R.; Ferguson, Leesa S.; Francese, Simona] Sheffield Hallam Univ, Biomed Res Ctr, Sheffield S1 1WB, S Yorkshire, England.
[Blackledge, Robert D.] USN, Criminal Invest Serv, Reg Forens Lab, San Diego, CA USA.
RP Francese, S (reprint author), Sheffield Hallam Univ, Biomed Res Ctr, Howard St, Sheffield S1 1WB, S Yorkshire, England.
EM s.francese@shu.ac.uk
OI Clench, Malcolm/0000-0002-0798-831X
NR 31
TC 33
Z9 33
U1 4
U2 27
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0951-4198
J9 RAPID COMMUN MASS SP
JI Rapid Commun. Mass Spectrom.
PD FEB
PY 2011
VL 25
IS 3
BP 415
EP 422
DI 10.1002/rcm.4858
PG 8
WC Biochemical Research Methods; Chemistry, Analytical; Spectroscopy
SC Biochemistry & Molecular Biology; Chemistry; Spectroscopy
GA 718LY
UT WOS:000287124300003
PM 21213360
ER
PT J
AU Olson, TY
Schwartzberg, AM
Liu, JL
Zhang, JZ
AF Olson, Tammy Y.
Schwartzberg, Adam M.
Liu, Jinny L.
Zhang, Jin Z.
TI Raman and Surface-Enhanced Raman Detection of Domoic Acid and Saxitoxin
SO APPLIED SPECTROSCOPY
LA English
DT Article
DE Surface-enhanced Raman spectroscopy; SERS; Silver nanoparticles; Domoic
acid; Saxitoxin; Detection
ID WALLED CARBON NANOTUBES; RECEPTOR-BINDING ASSAY; HARMFUL ALGAL BLOOMS;
PFIESTERIA-PISCICIDA; SCATTERING SERS; PHYTOPLANKTON ABSORPTION; GOLD
ELECTRODES; RAPID DETECTION; SILVER SOL; AMINO-ACID
AB The use of surface-enhanced Raman scattering (SERS) for detecting domoic acid and saxitoxin was demonstrated and vibrational modes have been assigned based on the current literature. Silver nanoparticles were used to obtain the SERS spectra of domoic acid for the first time, which displayed enhancement of nearly 70 times the normal Raman spectra. Unique features in the SERS spectrum of domoic acid allowed the binding effect and orientation of the domoic acid to the metal surface to be analyzed. Saxitoxin exhibited an undetectable normal Raman signal but revealed very prominent SERS peaks. SERS peak positions closely matched published experimental and theoretical values, but with different peak ratios, indicating variance in molecule-nanoparticle interaction depending on the SERS substrate utilized. SERS is demonstrated as a powerful analytical tool for detecting toxins at low concentration with molecular specificity and shows immense potential for fast and remote sensing of toxins in various applications.
C1 [Olson, Tammy Y.; Zhang, Jin Z.] Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA.
[Olson, Tammy Y.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Schwartzberg, Adam M.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Liu, Jinny L.] USN, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
RP Zhang, JZ (reprint author), Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA.
EM zhang@chemistry.ucsc.edu
FU National Science Foundation; University Affiliated Research Center at
NASA Ames; Lawrence Livermore National Laboratory
FX We are grateful for financial support from the National Science
Foundation, University Affiliated Research Center at NASA Ames, and the
Lawrence Scholar Program at Lawrence Livermore National Laboratory. We
would like to thank Dr. Christian Grant for his helpful discussions and
Drs. Nikolai Lebedev and Chris Spillmann for their helpful review
comments.
NR 66
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U2 23
PU SOC APPLIED SPECTROSCOPY
PI FREDERICK
PA 5320 SPECTRUM DRIVE SUITE C, FREDERICK, MD 21703 USA
SN 0003-7028
J9 APPL SPECTROSC
JI Appl. Spectrosc.
PD FEB
PY 2011
VL 65
IS 2
BP 159
EP 164
DI 10.1366/10-05910
PG 6
WC Instruments & Instrumentation; Spectroscopy
SC Instruments & Instrumentation; Spectroscopy
GA 710XE
UT WOS:000286549500005
ER
PT J
AU Holmes, JP
Clifton, GT
Patil, R
Benavides, LC
Gates, JD
Stojadinovic, A
Mittendorf, EA
Ponniah, S
Peoples, GE
AF Holmes, Jarrod P.
Clifton, Guy T.
Patil, Ritesh
Benavides, Linda C.
Gates, Jeremy D.
Stojadinovic, Alexander
Mittendorf, Elizabeth A.
Ponniah, Sathibalan
Peoples, George E.
TI Use of Booster Inoculations to Sustain the Clinical Effect of an
Adjuvant Breast Cancer Vaccine From US Military Cancer Institute
Clinical Trials Group Study I-01 and I-02
SO CANCER
LA English
DT Article
DE breast cancer; HER-2/neu peptide vaccine; E75; booster
ID T-CELL MEMORY; COLONY-STIMULATING FACTOR; HER2/NEU E75 VACCINE; PHASE-II
TRIAL; ANTITUMOR IMMUNITY; MELANOMA VACCINE; PEPTIDE VACCINE; DENDRITIC
CELLS; OVARIAN-CANCER; IN-VIVO
AB BACKGROUND: The authors are conducting clinical trials of the HER-2/neu E75-peptide vaccine in clinically disease-free breast cancer (BC) patients. Their phase 1-2 trials revealed that the E75 + granulocyte-macrophage colony-stimulating factor (GM-CSF) vaccine is safe and effective in stimulating clonal expansion of E75-specific CD8(+) T cells. They assessed the need for and response to a booster after completion of primary vaccination series. METHODS: BC patients enrolled in the E75 vaccine trials who were >= 6 months from completion of their primary vaccination series were offered boosters with E75 + GM-CSF. Patients were monitored for toxicity. E75-specific CD8(+) T cells were quantified using the human leukocyte antigen-A2: immunoglobulin G dimer before and after boosting. RESULTS: Fifty-three patients received the vaccine booster. Median time from primary vaccination series was 9 months (range, 6-35 months), and median residual E75-specific immunity was 0.70% (range, 0-3.49%) CD8(+) lymphocytes. Elevated residual immunity (ERI) (CD8(+) E75-specific T cells >0.5%) was seen in 94.4% of patients at 6 months from primary vaccination series versus 48% of patients at >6 months (P = .002). The booster was well tolerated, with only grade 1 and 2 toxicity observed. Local reactions were more robust in patients receiving the booster at 6 months from primary vaccination series compared with those at >6 months (99.4 +/- 6.1 mm vs 81.8 +/- 4.1 mm, P = .01). In patients lacking ERI, 85% had increased ERI after vaccination (P = .0014). CONCLUSIONS: The HER-2/neu E75 peptide vaccine E75 stimulates specific immunity in disease-free BC patients. However, immunity wanes with time. A vaccine booster is safe and effective in stimulating E75-specific immunity in those patients without ERI. These results suggest that the booster may be most effective at 6 months after completion of the primary vaccination series. Cancer 2011;117:463-71. Published 2010 by the American Cancer Society.*
C1 [Clifton, Guy T.; Benavides, Linda C.; Gates, Jeremy D.; Peoples, George E.] Brooke Army Med Ctr, Dept Surg, Gen Surg Serv, Ft Sam Houston, TX 78234 USA.
[Holmes, Jarrod P.] USN, Dept Hematol & Med Oncol, San Diego Med Ctr, San Diego, CA 92152 USA.
[Patil, Ritesh] Joyce Murtha Breast Canc Ctr, Windber, PA USA.
[Stojadinovic, Alexander] Walter Reed Army Med Ctr, Dept Surg, Washington, DC 20307 USA.
[Mittendorf, Elizabeth A.] Univ Texas MD Anderson Canc Ctr, Dept Surg Oncol, Houston, TX 77030 USA.
[Ponniah, Sathibalan; Peoples, George E.] US Mil Canc Inst, Canc Vaccine Dev Program, Bethesda, MD USA.
[Ponniah, Sathibalan; Peoples, George E.] Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD 20814 USA.
RP Peoples, GE (reprint author), Brooke Army Med Ctr, Dept Surg, Gen Surg Serv, 3851 Roger Brooke Dr, Ft Sam Houston, TX 78234 USA.
EM george.peoples@amedd.army.mil
FU United States Military Cancer Institute, Department of Surgery,
Uniformed Services University of the Health Sciences; Department of
Clinical Investigation, Walter Reed Army Medical Center
FX Supported by the United States Military Cancer Institute, Department of
Surgery, Uniformed Services University of the Health Sciences, and the
Department of Clinical Investigation, Walter Reed Army Medical Center.
Dr. Peoples has inventor rights. The E75 vaccine is licensed to Apthera,
Inc.
NR 35
TC 20
Z9 20
U1 0
U2 4
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0008-543X
J9 CANCER-AM CANCER SOC
JI Cancer
PD FEB 1
PY 2011
VL 117
IS 3
BP 463
EP 471
DI 10.1002/cncr.25586
PG 9
WC Oncology
SC Oncology
GA 709JC
UT WOS:000286433300010
PM 20845479
ER
PT J
AU McIlhany, KL
Wiggins, S
AF McIlhany, Kevin L.
Wiggins, Stephen
TI Optimizing mixing in channel flows: kinematic aspects associated with
secondary flows in the cross-section
SO MICROFLUIDICS AND NANOFLUIDICS
LA English
DT Article
DE Mixing; Chaotic advection; Channel flow; Kinematic model; Secondary
flow; Eulerian indicators
ID CHAOTIC ADVECTION; MICROMIXERS; DESIGN; MIXER
AB We consider an Eulerian predictor of optimal mixing appropriate for steady, three-dimensional channel flow of the type that is commonly used in a variety of microfluidic mixing applications. This Eulerian indicator is applied to a kinematic model of the channel flow that allows one to control the flow structure of the secondary flows and the number of distinct secondary flows. The cases of two and three distinct secondary flows are considered and the Eulerian indicator predicts the optimal flow structure in the two secondary flow case and in the three secondary flow case that result in the best mixing. Moreover, it is shown that the case of three secondary flows mixes "optimally" (i.e., faster and more completely) than the case of two secondary flows. An explanation of this difference is given in terms of the Eulerian flow structure.
C1 [McIlhany, Kevin L.] USN Acad, Dept Phys, Annapolis, MD 21402 USA.
[Wiggins, Stephen] Univ Bristol, Sch Math, Bristol BS8 1TW, Avon, England.
RP McIlhany, KL (reprint author), USN Acad, Dept Phys, Stop 9C,572C Holloway RD, Annapolis, MD 21402 USA.
EM mcilhany@usna.edu; s.wiggins@bristol.ac.uk
FU ONR [N00014-01-1-0769, N00014-09-WR-2-0256]; NSF
FX We have benefited very much from conversations with Elaine Oran and
David Mott of the Naval Research Laboratory and Greg Voth from Wesleyan
University. This research was supported by ONR grant no.
N00014-01-1-0769 and No. N00014-09-WR-2-0256. SW would like to
acknowledge the stimulating environment of the NSF sponsored Institute
for Mathematics and its Applications (IMA) at the University of
Minnesota, where this work was begun. KLM would like to thank Jeremy
Bruch and Reza Malek-Madani for so many useful conversations.
NR 16
TC 4
Z9 5
U1 1
U2 7
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 1613-4982
J9 MICROFLUID NANOFLUID
JI Microfluid. Nanofluid.
PD FEB
PY 2011
VL 10
IS 2
BP 249
EP 262
DI 10.1007/s10404-010-0656-6
PG 14
WC Nanoscience & Nanotechnology; Instruments & Instrumentation; Physics,
Fluids & Plasmas
SC Science & Technology - Other Topics; Instruments & Instrumentation;
Physics
GA 711TZ
UT WOS:000286615600002
ER
PT J
AU DiCarlo-Meacham, LTA
Dahlke, LCDRJ
AF DiCarlo-Meacham, L. T. Angela
Dahlke, L. C. D. R. Joshua
TI Atrial Fibrillation in Pregnancy
SO OBSTETRICS AND GYNECOLOGY
LA English
DT Article
AB BACKGROUND: Physiologic changes of pregnancy can predispose women to cardiac arrhythmias. Atrial fibrillation is rare in pregnancy and usually occurs in women with underlying cardiac anomalies.
CASE: A young woman at 22 weeks of gestation presented with new-onset atrial fibrillation with rapid ventricular response. Thorough evaluation revealed atrial fibrillation with no underlying cause and ultimately required treatment with electrical cardioversion.
CONCLUSION: Lone atrial fibrillation in pregnancy requires exclusion of all possible etiologies before diagnosis. Cardioversion is the treatment of choice. Women with persistent atrial fibrillation require anticoagulation and rate control, as well as fetal growth surveillance and antenatal testing. (Obstet Gynecol 2011; 117: 489-92) DOI: 10.1097/AOG.0b013e31820561ef
C1 [DiCarlo-Meacham, L. T. Angela; Dahlke, L. C. D. R. Joshua] USN, Med Ctr Portsmouth, Norfolk, VA USA.
RP DiCarlo-Meacham, LTA (reprint author), 620 John Paul Jones Circle, Portsmouth, VA 23708 USA.
EM angela.dicarlo@med.navy.mil
NR 8
TC 2
Z9 3
U1 1
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0029-7844
J9 OBSTET GYNECOL
JI Obstet. Gynecol.
PD FEB
PY 2011
VL 117
IS 2
SU S
BP 489
EP 492
DI 10.1097/AOG.0b013e31820561ef
PN 2
PG 4
WC Obstetrics & Gynecology
SC Obstetrics & Gynecology
GA 714KQ
UT WOS:000286808900024
PM 21252800
ER
PT J
AU Gresens, J
Rhodes, D
Smith, J
Gentry, A
AF Gresens, J.
Rhodes, D.
Smith, J.
Gentry, A.
TI EVALUATION OF POSSIBLE ASSOCIATION BETWEEN STATINS AND ABNORMAL
ESOPHAGEAL MOTILITY
SO JOURNAL OF INVESTIGATIVE MEDICINE
LA English
DT Meeting Abstract
CT Southern Regional Meeting
CY FEB 17-19, 2011
CL New Orleans, LA
C1 [Gresens, J.; Rhodes, D.; Smith, J.; Gentry, A.] Naval Med Ctr Portsmouth, Portsmouth, VA USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1081-5589
J9 J INVEST MED
JI J. Invest. Med.
PD FEB
PY 2011
VL 59
IS 2
MA 601
BP 541
EP 542
PG 2
WC Medicine, General & Internal; Medicine, Research & Experimental
SC General & Internal Medicine; Research & Experimental Medicine
GA 709SK
UT WOS:000286461500610
ER
PT J
AU Lambrakos, SG
Cooper, KP
AF Lambrakos, S. G.
Cooper, K. P.
TI Path-Weighted Diffusivity Functions for Parameterization of Heat
Deposition Processes
SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
LA English
DT Article
DE fabricated metal; joining; modeling processes
AB General parameterizations are constructed for spatial modulation of heat diffusion patterns according to energy deposition characteristics occurring within a volume of material where there exist inhomogeneous or anisotropic thermal diffusivity. These parameterizations are formulated in terms of path-weighted diffusivity functions. The construction of a general parameterization of energy deposition processes where spatially dependent thermal diffusivity exists is necessary for their inverse analysis. The structure of such a parameterization follows from the concepts of model and data spaces that imply the existence of an optimal parametric representation for a given class of inverse problems. Accordingly, the optimal parametric representation is determined by the characteristics of the available data, which, in principle, can contain both experimental measurements and numerical simulation data. Parameterizations for spatial modulation of heat diffusion follow from the observation that many different types of energy deposition processes can be represented by weighted sums of basis functions whose general forms are that of spatially modulated diffusion. The parameterizations presented are constructed according to a specific definition of the inverse heat deposition problem that provides a rigorous foundation for a highly flexible and general parameterization of energy deposition processes, which is essential for their inverse analysis.
C1 [Lambrakos, S. G.; Cooper, K. P.] USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
RP Lambrakos, SG (reprint author), USN, Res Lab, Div Mat Sci & Technol, Code 6390, Washington, DC 20375 USA.
EM lambrakos@nrl.navy.mil
FU Office of Naval Research
FX The authors thank the Office of Naval Research for its support in
performing this research.
NR 23
TC 2
Z9 2
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1059-9495
J9 J MATER ENG PERFORM
JI J. Mater. Eng. Perform.
PD FEB
PY 2011
VL 20
IS 1
BP 31
EP 39
DI 10.1007/s11665-010-9661-x
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA 706IV
UT WOS:000286212500004
ER
PT J
AU Cooper, KP
Lambrakos, SG
AF Cooper, K. P.
Lambrakos, S. G.
TI Thermal Modeling of Direct Digital Melt-Deposition Processes
SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
LA English
DT Article
DE melt deposition; microstructure; solidification; thermal modeling
AB Additive manufacturing involves creating three-dimensional (3D) objects by depositing materials layer-by-layer. The freeform nature of the method permits the production of components with complex geometry. Deposition processes provide one more capability, which is the addition of multiple materials in a discrete manner to create "heterogeneous" objects with locally controlled composition and microstructure. The result is direct digital manufacturing (DDM) by which dissimilar materials are added voxel-by-voxel (a voxel is volumetric pixel) following a predetermined tool-path. A typical example is functionally gradient material such as a gear with a tough core and a wear-resistant surface. The inherent complexity of DDM processes is such that process modeling based on direct physics-based theory is difficult, especially due to a lack of temperature-dependent thermophysical properties and particularly when dealing with melt-deposition processes. In order to overcome this difficulty, an inverse problem approach is proposed for the development of thermal models that can represent multi-material, direct digital melt deposition. This approach is based on the construction of a numerical-algorithmic framework for modeling anisotropic diffusivity such as that which would occur during energy deposition within a heterogeneous workpiece. This framework consists of path-weighted integral formulations of heat diffusion according to spatial variations in material composition and requires consideration of parameter sensitivity issues.
C1 [Cooper, K. P.; Lambrakos, S. G.] USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
RP Cooper, KP (reprint author), USN, Res Lab, Div Mat Sci & Technol, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM lambrakos@anvil.nrl.navy.mil
FU Office of Naval Research
FX The authors thank the Office of Naval Research for its support in
performing this research.
NR 7
TC 5
Z9 5
U1 2
U2 19
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1059-9495
J9 J MATER ENG PERFORM
JI J. Mater. Eng. Perform.
PD FEB
PY 2011
VL 20
IS 1
BP 48
EP 56
DI 10.1007/s11665-010-9659-4
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA 706IV
UT WOS:000286212500006
ER
PT J
AU Schubbe, JJ
AF Schubbe, Joel J.
TI Plate Thickness Variation Effects on Crack Growth Rates in 7050-T7451
Alloy Thick Plate
SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
LA English
DT Article
DE aerospace vehicles; aluminum alloys; delamination; fatigue crack growth;
fractography; fracture mechanics; mixed mode fracture
AB A study has been accomplished to characterize the fatigue crack growth rates and mechanisms in thick plate (16.51 cm) commercial grade 7050-T7451 aluminum plate in the L-S orientation. Examination of the effects of potential property gradients in the plate material was accomplished through hardness measurements along the short transverse direction and with compact tension tests. Tests exhibited a distinct trend of reduced center plane hardness in the plates. Compact tension specimens and the compliance method were used to determine crack growth rates for specimens machined from the t/4 and t/2 planar locations and oriented for L-S crack growth. Crack growth rate data (long crack) from the tests highlighted significant growth rate differences between the t/4 and t/2 locations. No significant effect of R-ratio was observed in the 0.05-0.3 range tested. Additionally, crack front splitting was noted in all specimens to differing degrees with data showing significant retardation of growth rate curves for the L-S orientation above 13 MPa aem in the center plane, and 10 MPa aem at quarter plane, where branching and splitting parallel to the load axis are dominant growth mechanisms.
C1 USN Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
RP Schubbe, JJ (reprint author), USN Acad, Dept Mech Engn, 590 Holloway Rd, Annapolis, MD 21402 USA.
EM Schubbe@usna.edu
FU US Navy; US Air Force
FX This work was supported by the US Navy, the US Air Force, and their
respective laboratories. Special thanks to USN LTs Ethan Lust and Paul
Coco for joining in the exploration of material characterization.
NR 10
TC 2
Z9 2
U1 1
U2 7
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1059-9495
J9 J MATER ENG PERFORM
JI J. Mater. Eng. Perform.
PD FEB
PY 2011
VL 20
IS 1
BP 147
EP 154
DI 10.1007/s11665-010-9657-6
PG 8
WC Materials Science, Multidisciplinary
SC Materials Science
GA 706IV
UT WOS:000286212500020
ER
PT J
AU Knipling, KE
Seidman, DN
Dunand, DC
AF Knipling, Keith E.
Seidman, David N.
Dunand, David C.
TI Ambient- and high-temperature mechanical properties of isochronally aged
Al-0.06Sc, Al-0.06Zr and Al-0.06Sc-0.06Zr (at.%) alloys
SO ACTA MATERIALIA
LA English
DT Article
DE Aluminum alloys; Precipitation; Isochronal heat-treatments; Scandium;
Zirconium
ID AL-SC ALLOYS; ELECTRICAL-RESISTIVITY MEASUREMENTS; LI-TI ALLOYS;
ALUMINUM-ALLOYS; DISPERSOID PRECIPITATION; AL(SC) ALLOYS; ZR ALLOYS;
RECRYSTALLIZATION RESISTANCE; ELEVATED-TEMPERATURES; TEMPORAL EVOLUTION
AB Ambient- and high-temperature precipitation strengthening are investigated in Al-0.06Sc, Al-0.06Zr and Al-0.06Sc-0.06Zr (at.%) alloys. Following solidification, Sc is concentrated at the dendrite peripheries while Zr is segregated at the dendrite cores. During isochronal aging, precipitation of Al3Sc (L1(2)) commences between 250 and 300 degrees C for Al-0.06Sc, and reaches a 429 MPa peak microhardness at 325 degrees C. For Al-0.06Zr, precipitation of Al3Zr (L1(2)) first occurs between 400 and 425 degrees C and reaches a 295 MPa peak microhardness at 475 degrees C. A pronounced synergistic effect is observed when both Sc and Zr are present. Above 325 degrees C, Zr additions provide a secondary strength increase that is attributed to precipitation of Zr-enriched outer shells onto the Al3Sc precipitates, leading to a peak microhardness of 618 MPa at 400 degrees C for Al-0.06Sc-0.06Zr. Upon compressive creep deformation at 300-400 degrees C, Al-0.06Sc-0.06Zr exhibits threshold stresses of 7-12 MPa; these values may be further improved by optimal heat-treatments. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
C1 [Knipling, Keith E.] USN, Res Lab, Multifunct Mat Branch, Washington, DC 20375 USA.
[Knipling, Keith E.; Seidman, David N.; Dunand, David C.] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
[Seidman, David N.] Northwestern Univ, Ctr Atom Probe Tomog NUCAPT, Evanston, IL 60208 USA.
RP Knipling, KE (reprint author), USN, Res Lab, Multifunct Mat Branch, Washington, DC 20375 USA.
EM keith.knipling@nrl.navy.mil
RI Seidman, David/B-6697-2009; Dunand, David/B-7515-2009;
OI Dunand, David/0000-0001-5476-7379
FU US Department of Energy, Basic Sciences Division [DEF-G0298ER45721]
FX This research is supported by the US Department of Energy, Basic
Sciences Division, under contract DEF-G0298ER45721. We thank Prof. R. J.
Tracy and Mr. C. Loehn (Virginia Tech) for performing the EPMA
linescans. We are pleased to acknowledge Profs. M.E. Fine and D. Isheim
(Northwestern University) and Dr. R.A. Karnesky (Sandia National Lab)
for useful discussions.
NR 98
TC 69
Z9 73
U1 2
U2 53
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD FEB
PY 2011
VL 59
IS 3
BP 943
EP 954
DI 10.1016/j.actamat.2010.10.017
PG 12
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 712TW
UT WOS:000286690100009
ER
PT J
AU Lunsford, VW
AF Lunsford, Virginia W.
TI The Invisible Hook: The Hidden Economics of Pirates
SO AMERICAN HISTORICAL REVIEW
LA English
DT Book Review
C1 [Lunsford, Virginia W.] USN Acad, Annapolis, MD 21402 USA.
RP Lunsford, VW (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0002-8762
J9 AM HIST REV
JI Am. Hist. Rev.
PD FEB
PY 2011
VL 116
IS 1
BP 143
EP 144
DI 10.1086/ahr.116.1.143
PG 2
WC History
SC History
GA 722II
UT WOS:000287425500012
ER
PT J
AU Herrera, S
Solarte, Y
Jordan-Villegas, A
Echavarria, JF
Rocha, L
Palacios, R
Ramirez, O
Velez, JD
Epstein, JE
Richie, TL
Arevalo-Herrera, M
AF Herrera, Socrates
Solarte, Yezid
Jordan-Villegas, Alejandro
Fernando Echavarria, Juan
Rocha, Leonardo
Palacios, Ricardo
Ramirez, Oscar
Velez, Juan D.
Epstein, Judith E.
Richie, Thomas L.
Arevalo-Herrera, Myriam
TI Consistent Safety and Infectivity in Sporozoite Challenge Model of
Plasmodium vivax in Malaria-Naive Human Volunteers
SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
LA English
DT Article
ID FALCIPARUM-INFECTED MOSQUITOS; WILD AFROTROPICAL ANOPHELES; GAMETOCYTE
CARRIERS; CELLULAR-RESPONSES; TRANSMISSION; DIVERSITY; VACCINE;
INFECTIOUSNESS; QUANTITATION; INDIVIDUALS
AB A safe and reproducible Plasmodium vivax infectious challenge method is required to evaluate the efficacy of malaria vaccine candidates. Seventeen healthy Duffy (+) and five Duffy (-) subjects were randomly allocated into three (A-C) groups and were exposed to the bites of 2-4 Anopheles albimanus mosquitoes infected with Plasmodium vivax derived from three donors. Duffy (-) subjects were included as controls for each group. Clinical manifestations of malaria and parasitemia were monitored beginning 7 days post-challenge. All Duffy (+) volunteers developed patent malaria infection within 16 days after challenge. Prepatent period determined by thick smear, was longer for Group A (median 14.5 d) than for Groups B and C (median 10 d/each). Infected volunteers recovered rapidly after treatment with no serious adverse events. The bite of as low as two P vivax-infected mosquitoes provides safe and reliable infections in malaria-naive volunteers, suitable for assessing antimalarial and vaccine efficacy trials.
C1 [Herrera, Socrates] Malaria Vaccine & Drug Dev Ctr, Cali, Colombia.
[Herrera, Socrates; Solarte, Yezid; Jordan-Villegas, Alejandro; Fernando Echavarria, Juan; Rocha, Leonardo; Arevalo-Herrera, Myriam] Univ Valle, Fac Salud, Inst Inmunol, Cali, Colombia.
[Palacios, Ricardo] Univ Fed Sao Paulo, Div Infect Dis, Sao Paulo, Brazil.
[Ramirez, Oscar; Velez, Juan D.] Fdn Clin Valle del Lili, Cali, Colombia.
USN, Med Res Ctr, US Mil Malaria Vaccine Program, Silver Spring, MD USA.
RP Herrera, S (reprint author), Malaria Vaccine & Drug Dev Ctr, Carrera 37,2Bis 5E-08, Cali, Colombia.
EM sherrera@inmuno.org; ysolarte@inmuno.org; alejovi@hotmail.com;
jechavarria@inmuno.org; lrocha94@yahoo.com; ricardopalacios@gmx.net;
oramirez@fcvl.org; jdvelez@telesat.com.co; Judith.Epstein@med.navy.mil;
Thomas.Richie@med.navy.mil; marevalo@inmuno.org
RI Solarte, Yezid/C-1196-2013; Rocha Orjuela, Raul Leonardo/L-6378-2016
OI Solarte, Yezid/0000-0003-4173-0256; Richie, Thomas/0000-0002-2946-5456;
Rocha Orjuela, Raul Leonardo/0000-0001-6887-7421
FU World Health Organization Initiative for Vaccine Research [LA35735G];
National Institute of Allergy and Infectious Diseases (NIAID)
[49486/TMRC]; Colombian National Research Council; COLCIENCIAS; Ministry
for Social Protection [253-2005, 207-2007]; Malaria Vaccine and Drug
Development Center Foundation
FX This work was supported by World Health Organization Initiative for
Vaccine Research (grant no. LA35735G), National Institute of Allergy and
Infectious Diseases (NIAID grant no. 49486/TMRC), Colombian National
Research Council, COLCIENCIAS and the Ministry for Social Protection
(contract nos. 253-2005 and 207-2007), and the Malaria Vaccine and Drug
Development Center Foundation.
NR 39
TC 23
Z9 24
U1 0
U2 4
PU AMER SOC TROP MED & HYGIENE
PI MCLEAN
PA 8000 WESTPARK DR, STE 130, MCLEAN, VA 22101 USA
SN 0002-9637
J9 AM J TROP MED HYG
JI Am. J. Trop. Med. Hyg.
PD FEB
PY 2011
VL 84
IS 2
SU 2
BP 4
EP 11
DI 10.4269/ajtmh.2011.09-0498
PG 8
WC Public, Environmental & Occupational Health; Tropical Medicine
SC Public, Environmental & Occupational Health; Tropical Medicine
GA 716WL
UT WOS:000287004100002
PM 21292872
ER
PT J
AU Jordan-Villegas, A
Perdomo, AB
Epstein, JE
Lopez, J
Castellanos, A
Manzano, MR
Hernandez, MA
Soto, L
Mendez, F
Richie, TL
Hoffman, SL
Arevalo-Herrera, M
Herrera, S
AF Jordan-Villegas, Alejandro
Bonelo Perdomo, Anilza
Epstein, Judith E.
Lopez, Jesus
Castellanos, Alejandro
Manzano, Maria R.
Hernandez, Miguel A.
Soto, Liliana
Mendez, Fabian
Richie, Thomas L.
Hoffman, Stephen L.
Arevalo-Herrera, Myriam
Herrera, Socrates
TI Immune Responses and Protection of Aotus Monkeys Immunized with
Irradiated Plasmodium vivax Sporozoites
SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
LA English
DT Article
ID CD8(+) T-CELLS; MALARIA SPOROZOITES; CIRCUMSPOROZOITE PROTEIN;
FALCIPARUM SPOROZOITES; ATTENUATED SPOROZOITES; INTERFERON-GAMMA; LIVER
STAGES; BERGHEI; PARASITES; VACCINE
AB A non-human primate model for the induction of protective immunity against the pre-erythrocytic stages of Plasmodium vivax malaria using radiation-attenuated P vivax sporozoites may help to characterize protective immune mechanisms and identify novel malaria vaccine candidates. Immune responses and protective efficacy induced by vaccination with irradiated P vivax sporozoites were evaluated in malaria-naive Aotus monkeys. Three groups of six monkeys received two, five, or ten intravenous inoculations, respectively, of 100,000 irradiated P vivax sporozoites; control groups received either 10 doses of uninfected salivary gland extract or no inoculations. Immunization resulted in the production low levels of antibodies that specifically recognized P vivax sporozoites and the circumsporozoite protein. Additionally, immunization induced low levels of antigen-specific IFN-gamma responses. Intravenous challenge with viable sporozoites resulted in partial protection in a dose-dependent manner. These findings suggest that the Aotus monkey model may be able to play a role in preclinical development of P vivax pre-erythrocytic stage vaccines.
C1 [Herrera, Socrates] Malaria Vaccine & Drug Dev Ctr, Cali, Colombia.
[Jordan-Villegas, Alejandro; Bonelo Perdomo, Anilza; Castellanos, Alejandro; Hernandez, Miguel A.; Soto, Liliana; Mendez, Fabian; Arevalo-Herrera, Myriam; Herrera, Socrates] Univ Valle, Fac Salud, Inst Inmunol, Cali, Colombia.
[Epstein, Judith E.; Richie, Thomas L.] USN, Malaria Program, Med Res Ctr, US Mil Malaria Vaccine Program, Silver Spring, MD USA.
[Lopez, Jesus] Hosp Univ Valle, Cali, Colombia.
[Manzano, Maria R.] Univ Nacl Colombia, Dept Ciencias Agr, Palmira, Colombia.
[Hoffman, Stephen L.] Sanaria Inc, Rockville, MD USA.
RP Herrera, S (reprint author), Malaria Vaccine & Drug Dev Ctr, Carrera 37,2Bis 5E-08, Cali, Colombia.
EM alejovi@hotmail.com; anbonelo@yahoo.com; Judith.Epstein@med.navy.mil;
jesus.lopez@hotmail.com; alejcaste@yahoo.com;
mrmanzanom@palmira.unal.edu.co; mhernandez@inmuno.org; lsoto@inmuno.org;
famendez@univalle.edu.co; Thomas.Richie@med.navy.mil;
slhoffman@sanaria.com; marevalo@inmuno.org; sherrera@inmuno.org
RI Manzano, Maria/D-3955-2011;
OI Manzano, Maria/0000-0002-0858-2426; Richie, Thomas/0000-0002-2946-5456
FU Special Programme for Research and Training in Tropical Diseases; U.S.
National Institute of Allergy and Infectious Diseases (NIAID/TMRC)
[AI49486-02]; UNDP/World Bank/World Health Organization; Instituto
Colombian Francisco Jose de Caldas para la Ciencia y la Tecnologia
(COLCIENCIAS)
FX This work was supported by grants from the Special Programme for
Research and Training in Tropical Diseases, and by the U.S. National
Institute of Allergy and Infectious Diseases (NIAID/TMRC contract no.
AI49486-02), the UNDP/World Bank/World Health Organization, and the
Instituto Colombian Francisco Jose de Caldas para la Ciencia y la
Tecnologia (COLCIENCIAS).
NR 44
TC 7
Z9 7
U1 0
U2 4
PU AMER SOC TROP MED & HYGIENE
PI MCLEAN
PA 8000 WESTPARK DR, STE 130, MCLEAN, VA 22101 USA
SN 0002-9637
EI 1476-1645
J9 AM J TROP MED HYG
JI Am. J. Trop. Med. Hyg.
PD FEB
PY 2011
VL 84
IS 2
SU 2
BP 43
EP 50
DI 10.4269/ajtmh.2011.09-0759
PG 8
WC Public, Environmental & Occupational Health; Tropical Medicine
SC Public, Environmental & Occupational Health; Tropical Medicine
GA 716WL
UT WOS:000287004100007
PM 21292877
ER
PT J
AU Jordan, PM
Fulford, JK
AF Jordan, P. M.
Fulford, J. K.
TI A NOTE ON POROACOUSTIC TRAVELING WAVES UNDER DARCY'S LAW: EXACT
SOLUTIONS
SO APPLICATIONS OF MATHEMATICS
LA English
DT Article
DE poroacoustics; Darcy's law; traveling waves; shock and acceleration
waves
ID POROUS SOLIDS; FLOW; PROPAGATION
AB A mathematical analysis of poroacoustic traveling wave phenomena is presented. Assuming that the fluid phase satisfies the perfect gas law and that the drag offered by the porous matrix is described by Darcy's law, exact traveling wave solutions (TWS)s, as well as asymptotic/approximate expressions, are derived and examined. In particular, stability issues are addressed, shock and acceleration waves are shown to arise, and special/limiting cases are noted. Lastly, connections to other fields are pointed out and possible extensions of this work are briefly discussed.
C1 [Jordan, P. M.; Fulford, J. K.] USN, Res Lab, Acoust Div, Stennis Space Ctr, MS 39529 USA.
RP Jordan, PM (reprint author), USN, Res Lab, Acoust Div, Stennis Space Ctr, MS 39529 USA.
EM pjordan@nrlssc.navy.mil; jim.fulford@nrlssc.navy.mil
FU ONR/NRL [PE 061153N]
FX This work was supported by ONR/NRL funding (PE 061153N). All figures
appearing herein were generated using the software package MATHEMATICA.
NR 26
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Z9 5
U1 2
U2 5
PU ACAD SCIENCES CZECH REPUBLIC, INST MATHEMATICS
PI PRAHA 1
PA ZITNA 25, PRAHA 1, 115 67, CZECH REPUBLIC
SN 0862-7940
J9 APPL MATH-CZECH
JI Appl. Mat.
PD FEB
PY 2011
VL 56
IS 1
BP 99
EP 115
PG 17
WC Mathematics, Applied
SC Mathematics
GA 889GD
UT WOS:000300060700006
ER
PT J
AU Cooper, JB
Larkin, CM
Schmitigal, J
Morris, RE
Abdelkader, MF
AF Cooper, John B.
Larkin, Christopher M.
Schmitigal, Joel
Morris, Robert E.
Abdelkader, Mohamed F.
TI Rapid Analysis of Jet Fuel Using a Handheld Near-Infrared (NIR) Analyzer
SO APPLIED SPECTROSCOPY
LA English
DT Article
DE Jet fuel; Multivariate analysis; Partial least squares; PLS;
Near-infrared spectroscopy; NIR spectroscopy; Handheld instrumentation
ID PARTIAL LEAST-SQUARES; SPECTROSCOPY DATA; MULTIVARIATE CALIBRATION;
GASOLINE CLASSIFICATION; QUALITY; MODELS; PREDICTION; REGRESSION;
SPECTRA; VISCOSITY
AB A handheld near-infrared (NIR) analyzer was used to build partial least squares (PLS) models relating jet fuel properties to the spectral data (880-1570 nm). The properties included: API gravity, % aromatics, cetane index, density, 10%/50%/90% recovered distillation temperatures, freezing point, flashpoint, hydrogen content, and % saturates. The models were validated using leave-one-out validation of the training sets and by predicting an independent test set of fuels. The repeatability of the developed NIR methods was determined by performing replicate measurements on a single master analyzer. The reproducibility of the NIR methods was determined by performing measurements on multiple samples using five different analyzers. The results indicate that the NIR methods are useful for rapid monitoring of jet fuel quality at commercial airports during transport, storage, and distribution.
C1 [Cooper, John B.; Abdelkader, Mohamed F.] Old Dominion Univ, Dept Chem, Norfolk, VA 23529 USA.
[Larkin, Christopher M.] Bruker Opt, The Woodlands, TX 77381 USA.
[Schmitigal, Joel] USA, RDECOM TARDEC, Warren, MI 48397 USA.
[Morris, Robert E.] USN, Res Lab, Washington, DC 20375 USA.
RP Cooper, JB (reprint author), Old Dominion Univ, Dept Chem, Norfolk, VA 23529 USA.
EM jbc@brukeroptics.com
NR 53
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Z9 7
U1 2
U2 17
PU SOC APPLIED SPECTROSCOPY
PI FREDERICK
PA 5320 SPECTRUM DRIVE SUITE C, FREDERICK, MD 21703 USA
SN 0003-7028
J9 APPL SPECTROSC
JI Appl. Spectrosc.
PD FEB
PY 2011
VL 65
IS 2
BP 187
EP 192
DI 10.1366/10-06076
PG 6
WC Instruments & Instrumentation; Spectroscopy
SC Instruments & Instrumentation; Spectroscopy
GA 710XE
UT WOS:000286549500009
ER
PT J
AU Green, LM
Kliem, B
Wallace, AJ
AF Green, L. M.
Kliem, B.
Wallace, A. J.
TI Photospheric flux cancellation and associated flux rope formation and
eruption
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE Sun: activity; Sun: coronal mass ejections (CMEs); magnetic fields;
magnetic reconnection; Sun: photosphere; Sun: magnetic topology
ID CORONAL MASS EJECTIONS; SOLAR ACTIVE REGIONS; MAGNETIC-FLUX; IMAGING
SPECTROMETER; ELECTRIC-CURRENTS; HINODE; FIELD; EVOLUTION; FLARES;
PROMINENCES
AB Aims. We study an evolving bipolar active region that exhibits flux cancellation at the internal polarity inversion line, the formation of a soft X-ray sigmoid along the inversion line and a coronal mass ejection. The aim is to investigate the quantity of flux cancellation that is involved in flux rope formation in the time period leading up to the eruption.
Methods. The active region is studied using its extreme ultraviolet and soft X-ray emissions as it evolves from a sheared arcade to flux rope configuration. The evolution of the photospheric magnetic field is described and used to estimate how much flux is reconnected into the flux rope.
Results. About one third of the active region flux cancels at the internal polarity inversion line in the 2.5 days leading up to the eruption. In this period, the coronal structure evolves from a weakly to a highly sheared arcade and then to a sigmoid that crosses the inversion line in the inverse direction. These properties suggest that a flux rope has formed prior to the eruption. The amount of cancellation implies that up to 60% of the active region flux could be in the body of the flux rope. We point out that only part of the cancellation contributes to the flux in the rope if the arcade is only weakly sheared, as in the first part of the evolution. This reduces the estimated flux in the rope to similar to 30% or less of the active region flux. We suggest that the remaining discrepancy between our estimate and the limiting value of similar to 10% of the active region flux, obtained previously by the flux rope insertion method, results from the incomplete coherence of the flux rope, due to nonuniform cancellation along the polarity inversion line. A hot linear feature is observed in the active region which rises as part of the eruption and then likely traces out the field lines close to the axis of the flux rope. The flux cancellation and changing magnetic connections at one end of this feature suggest that the flux rope reaches coherence by reconnection immediately before and early in the impulsive phase of the associated flare. The sigmoid is destroyed in the eruption but reforms quickly, with the amount of cancellation involved being much smaller than in the course of its original formation.
C1 [Green, L. M.; Kliem, B.; Wallace, A. J.] Univ Coll London, Mullard Space Sci Lab, Surrey RH5 6NT, England.
[Kliem, B.] Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany.
[Kliem, B.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Green, LM (reprint author), Univ Coll London, Mullard Space Sci Lab, Surrey RH5 6NT, England.
EM lmg@mssl.ucl.ac.uk
FU Royal Society; Leverhulme Fellowship; STFC; DFG; NASA [NNH06AD58I,
NNX08AG44G]; JAXA (Japan); NAOJ (Japan); STFC (UK); NASA (USA); ESA; NSC
(Norway)
FX We thank the referee, G. Aulanier, for the very constructive reports
that significantly helped improve the clarity of this paper and Duncan
Mackay for helpful discussions and comments on the manuscript. L. M. G.
was supported by a Royal Society Dorothy Hodgkin Fellowship and a
Leverhulme Fellowship. A.J.W. was supported by STFC via a Ph.D.
studentship. B. K. acknowledges support by the DFG, the STFC, and NASA
grants NNH06AD58I and NNX08AG44G. Hinode is a Japanese mission developed
and launched by ISAS/JAXA, collaborating with NAOJ as a domestic
partner, NASA and STFC (UK) as international partners. Scientific
operation of the Hinode mission is conducted by the Hinode science team
organised at ISAS/JAXA. This team mainly consists of scientists from
institutes in the partner countries. Support for the post-launch
operation is provided by JAXA and NAOJ (Japan), STFC (UK), NASA (USA),
ESA, and NSC (Norway). This research has made use of the LASCO CME
catalog, generated and maintained at the CDAW Data Center by NASA and
The Catholic University of America in cooperation with the NRL. SOHO is
a project of international cooperation between ESA and NASA.
NR 52
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U1 0
U2 9
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD FEB
PY 2011
VL 526
AR A2
DI 10.1051/0004-6361/201015146
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 709RF
UT WOS:000286458400014
ER
PT J
AU Stenborg, G
Marsch, E
Vourlidas, A
Howard, R
Baldwin, K
AF Stenborg, G.
Marsch, E.
Vourlidas, A.
Howard, R.
Baldwin, K.
TI A novel technique to measure intensity fluctuations in EUV images and to
detect coronal sound waves nearby active regions
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE methods: observational; Sun: corona; waves
ID VACUUM-ULTRAVIOLET WAVELENGTHS; SLOW MAGNETOACOUSTIC WAVES; SOLAR-WIND;
MAGNETIC-FIELDS; TRANSITION REGION; PLASMA FLOWS; IMAGING SPECTROMETER;
POLAR PLUMES; SPACED DATA; HINODE-EIS
AB Context. In the past years, evidence for the existence of outward-moving (Doppler blue-shifted) plasma and slow-mode magneto-acoustic propagating waves in various magnetic field structures (loops in particular) in the solar corona has been found in ultraviolet images and spectra. Yet their origin and possible connection to and importance for the mass and energy supply to the corona and solar wind is still unclear. There has been increasing interest in this problem thanks to the high-resolution observations available from the extreme ultraviolet (EUV) imagers on the Solar TErrestrial RElationships Observatory (STEREO) and the EUV spectrometer on the Hinode mission.
Aims. Flows and waves exist in the corona, and their signatures appear in EUV imaging observations but are extremely difficult to analyse quantitatively because of their weak intensity. Hence, such information is currently available mostly from spectroscopic observations that are restricted in their spatial and temporal coverage. To understand the nature and origin of these fluctuations, imaging observations are essential. Here, we present measurements of the speed of intensity fluctuations observed along apparently open field lines with the Extreme UltraViolet Imagers (EUVI) onboard the STEREO mission. One aim of our paper is to demonstrate that we can make reliable kinematic measurements from these EUV images, thereby complementing and extending the spectroscopic measurements and opening up the full corona for such an analysis. Another aim is to examine the assumptions that lead to flow versus wave interpretation for these fluctuations.
Methods. We have developed a novel image-processing method by fusing well established techniques for the kinematic analysis of coronal mass ejections (CME) with standard wavelet analysis. The power of our method lies with its ability to recover weak intensity fluctuations along individual magnetic structures at any orientation, anywhere within the full solar disk, and using standard synoptic observing sequences (cadence <3 min) without the need for special observation plans.
Results. Using information from both EUVI imagers, we obtained wave phase speeds with values on the order of 60-90 km s(-1), compatible with those obtained by other previous measurements. Moreover, we studied the periodicity of the observed fluctuations and established a predominance of a 16-min period, and other periods that seem to be multiples of an underlying 8-min period.
Conclusions. The validation of our analysis technique opens up new possibilities for the study of coronal flows and waves, by extending it to the full disk and to a larger number of coronal structures than has been possible previously. It opens up a new scientific capability for the EUV observations from the recently launched Solar Dynamics Observatory. Here we clearly establish the ubiquitous existence of sound waves which continuously propagate along apparently open magnetic field lines.
C1 [Stenborg, G.] Interferometrics Inc, Herndon, VA 20171 USA.
[Marsch, E.] Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany.
[Vourlidas, A.; Howard, R.] USN, Res Lab, Washington, DC 20375 USA.
[Baldwin, K.] Praxis Inc, Alexandria, VA 22303 USA.
RP Stenborg, G (reprint author), Interferometrics Inc, Herndon, VA 20171 USA.
EM guillermo.stenborg.ctr.ar@nrl.navy.mil
RI Vourlidas, Angelos/C-8231-2009
OI Vourlidas, Angelos/0000-0002-8164-5948
NR 46
TC 11
Z9 11
U1 0
U2 4
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD FEB
PY 2011
VL 526
AR A58
DI 10.1051/0004-6361/201014369
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 709RF
UT WOS:000286458400070
ER
PT J
AU Abdo, AA
Ackermann, M
Ajello, M
Allafort, A
Baldini, L
Ballet, J
Barbiellini, G
Baring, MG
Bastieri, D
Bechtol, K
Bellazzini, R
Berenji, B
Blandford, RD
Bloom, ED
Bonamente, E
Borgland, AW
Bouvier, A
Brandt, TJ
Bregeon, J
Brez, A
Brigida, M
Bruel, P
Buehler, R
Buson, S
Caliandro, GA
Cameron, RA
Cannon, A
Caraveo, PA
Carrigan, S
Casandjian, JM
Cavazzuti, E
Cecchi, C
Celik, O
Charles, E
Chekhtman, A
Cheung, CC
Chiang, J
Ciprini, S
Claus, R
Cohen-Tanugi, J
Conrad, J
Cutini, S
Dermer, CD
de Palma, F
Silva, EDE
Drell, PS
Dubois, R
Dumora, D
Favuzzi, C
Fegan, SJ
Ferrara, EC
Focke, WB
Fortin, P
Frailis, M
Fuhrmann, L
Fukazawa, Y
Funk, S
Fusco, P
Gargano, F
Gasparrini, D
Gehrels, N
Germani, S
Giglietto, N
Giordano, F
Giroletti, M
Glanzman, T
Godfrey, G
Grenier, IA
Guillemot, L
Guiriec, S
Hayashida, M
Hays, E
Horan, D
Hughes, RE
Johannesson, G
Johnson, AS
Johnson, WN
Kadler, M
Kamae, T
Katagiri, H
Kataoka, J
Knodlseder, J
Kuss, M
Lande, J
Latronico, L
Lee, SH
Lemoine-Goumard, M
Longo, F
Loparco, F
Lott, B
Lovellette, MN
Lubrano, P
Madejski, GM
Makeev, A
Max-Moerbeck, W
Mazziotta, MN
McEnery, JE
Mehault, J
Michelson, PF
Mitthumsiri, W
Mizuno, T
Moiseev, AA
Monte, C
Monzani, ME
Morselli, A
Moskalenko, IV
Murgia, S
Naumann-Godo, M
Nishino, S
Nolan, PL
Norris, JP
Nuss, E
Ohsugi, T
Okumura, A
Omodei, N
Orlando, E
Ormes, JF
Paneque, D
Panetta, JH
Parent, D
Pavlidou, V
Pearson, TJ
Pelassa, V
Pepe, M
Pesce-Rollins, M
Piron, F
Porter, TA
Raino, S
Rando, R
Razzano, M
Readhead, A
Reimer, A
Reimer, O
Richards, JL
Ripken, J
Ritz, S
Roth, M
Sadrozinski, HFW
Sanchez, D
Sander, A
Scargle, JD
Sgro, C
Siskind, EJ
Smith, PD
Spandre, G
Spinelli, P
Stawarz, L
Stevenson, M
Strickman, MS
Sokolovsky, KV
Suson, DJ
Takahashi, H
Takahashi, T
Tanaka, T
Thayer, JB
Thayer, JG
Thompson, DJ
Tibaldo, L
Torres, F
Tosti, G
Tramacere, A
Uchiyama, Y
Usher, TL
Vandenbroucke, J
Vasileiou, V
Vilchez, N
Vitale, V
Waite, AP
Wang, P
Wehrle, AE
Winer, BL
Wood, KS
Yang, Z
Ylinen, T
Zensus, JA
Ziegler, M
Aleksic, J
Antonelli, LA
Antoranz, P
Backes, M
Barrio, JA
Gonzalez, JB
Bednarek, W
Berdyugin, A
Berger, K
Bernardini, E
Biland, A
Blanch, O
Bock, RK
Boller, A
Bonnoli, G
Bordas, P
Tridon, DB
Bosch-Ramon, V
Bose, D
Braun, I
Bretz, T
Camara, M
Carmona, E
Carosi, A
Colin, P
Colombo, E
Contreras, JL
Cortina, J
Covino, S
Dazzi, F
de Angelis, A
del Pozo, ED
De Lotto, B
De Maria, M
De Sabata, F
Mendez, CD
Ortega, AD
Doert, M
Dominguez, A
Prester, DD
Dorner, D
Doro, M
Elsaesser, D
Ferenc, D
Fonseca, MV
Font, L
Lopen, RJG
Garczarczyk, M
Gaug, M
Giavitto, G
Godinovi, N
Hadasch, D
Herrero, A
Hildebrand, D
Hohne-Monch, D
Hose, J
Hrupec, D
Jogler, T
Klepser, S
Krahenbuhl, T
Kranich, D
Krause, J
La Barbera, A
Leonardo, E
Lindfors, E
Lombardi, S
Lopez, M
Lorenz, E
Majumdar, P
Makariev, E
Maneva, G
Mankuzhiyil, N
Mannheim, K
Maraschi, L
Mariotti, M
Martinez, M
Mazin, D
Meucci, M
Miranda, JM
Mirzoyan, R
Miyamoto, H
Moldon, J
Moralejo, A
Nieto, D
Nilsson, K
Orito, R
Oya, I
Paoletti, R
Paredes, JM
Partini, S
Pasanen, M
Pauss, F
Pegna, RG
Perez-Torres, MA
Persic, M
Peruzzo, J
Pochon, J
Moroni, PGP
Prada, F
Prandini, E
Puchades, N
Puljak, I
Reichardt, T
Reinthal, R
Rhode, W
Ribo, M
Rico, J
Rissi, M
Rugamer, S
Saggion, A
Saito, K
Saito, TY
Salvati, M
Sanchez-Conde, M
Satalecka, K
Scalzotto, V
Scapin, V
Schultz, C
Schweizer, T
Shayduk, M
Shore, SN
Sierpowska-Bartosik, A
Sillanpaa, A
Sitarek, J
Sobczynska, D
Spanier, F
Spiro, S
Stamerra, A
Steinke, B
Storz, J
Strah, N
Struebig, JC
Suric, T
Takalo, LO
Tavecchio, F
Temnikov, P
Terzic, T
Tescaro, D
Teshima, M
Vankov, H
Wagner, RM
Weitzel, Q
Zabalza, V
Zandanel, F
Zanin, R
Acciari, VA
Arlen, T
Aune, T
Benbow, W
Boltuch, D
Bradbury, SM
Buckley, JH
Bugaev, V
Cannon, A
Cesarini, A
Ciupik, L
Cui, W
Dickherber, R
Errando, M
Falcone, A
Finley, JP
Finnegan, G
Fortson, L
Furniss, A
Galante, N
Gall, D
Gillanders, GH
Godambe, S
Grube, J
Guenette, R
Gyuk, G
Hanna, D
Holder, J
Huang, D
Hui, CM
Humensky, TB
Kaaret, P
Karlsson, N
Kertzman, M
Kieda, D
Konopelko, A
Krawczynski, H
Krennrich, F
Lang, MJ
Maier, G
McArthur, S
McCann, A
McCutcheon, M
Moriarty, P
Mukherjee, R
Ong, R
Otte, N
Pandel, D
Perkins, JS
Pichel, A
Pohl, M
Quinn, J
Ragan, K
Reyes, LC
Reynolds, PT
Roache, E
Rose, HJ
Rovero, AC
Schroedter, M
Sembroski, GH
Senturk, GD
Steele, D
Swordy, SP
Tesic, G
Theiling, M
Thibadeau, S
Varlotta, A
Vincent, S
Wakely, SP
Ward, JE
Weekes, TC
Weinstein, A
Weisgarber, T
Williams, DA
Wood, M
Zitzer, B
Villata, M
Raiteri, CM
Aller, HD
Aller, MF
Arkharov, AA
Blinov, DA
Calcidese, P
Chen, WP
Efimova, NV
Kimeridze, G
Konstantinova, TS
Kopatskaya, EN
Koptelova, E
Kurtanidze, OM
Kurtanidze, SO
Lahteenmaki, A
Larionov, VM
Larionova, EG
Larionova, LV
Ligustri, R
Morozova, DA
Nikolashvili, MG
Sigua, LA
Troitsky, IS
Angelakis, E
Capalbi, M
Carraminana, A
Carrasco, L
Cassaro, P
de la Fuente, E
Gurwell, MA
Kovalev, YY
Kovalev, YA
Krichbaum, TP
Krimm, HA
Leto, P
Lister, ML
Maccaferri, G
Moody, JW
Mori, Y
Nestoras, I
Orlati, A
Pagani, C
Pace, C
Pearson, R
Perri, M
Piner, BG
Pushkarev, AB
Ros, E
Sadun, AC
Sakamoto, T
Tornikoski, M
Yatsu, Y
Zook, A
AF Abdo, A. A.
Ackermann, M.
Ajello, M.
Allafort, A.
Baldini, L.
Ballet, J.
Barbiellini, G.
Baring, M. G.
Bastieri, D.
Bechtol, K.
Bellazzini, R.
Berenji, B.
Blandford, R. D.
Bloom, E. D.
Bonamente, E.
Borgland, A. W.
Bouvier, A.
Brandt, T. J.
Bregeon, J.
Brez, A.
Brigida, M.
Bruel, P.
Buehler, R.
Buson, S.
Caliandro, G. A.
Cameron, R. A.
Cannon, A.
Caraveo, P. A.
Carrigan, S.
Casandjian, J. M.
Cavazzuti, E.
Cecchi, C.
Celik, O. .
Charles, E.
Chekhtman, A.
Cheung, C. C.
Chiang, J.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Conrad, J.
Cutini, S.
Dermer, C. D.
de Palma, F.
do Couto e Silva, E.
Drell, P. S.
Dubois, R.
Dumora, D.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Focke, W. B.
Fortin, P.
Frailis, M.
Fuhrmann, L.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Gasparrini, D.
Gehrels, N.
Germani, S.
Giglietto, N.
Giordano, F.
Giroletti, M.
Glanzman, T.
Godfrey, G.
Grenier, I. A.
Guillemot, L.
Guiriec, S.
Hayashida, M.
Hays, E.
Horan, D.
Hughes, R. E.
Johannesson, G.
Johnson, A. S.
Johnson, W. N.
Kadler, M.
Kamae, T.
Katagiri, H.
Kataoka, J.
Knoedlseder, J.
Kuss, M.
Lande, J.
Latronico, L.
Lee, S. -H.
Lemoine-Goumard, M.
Longo, F.
Loparco, F.
Lott, B.
Lovellette, M. N.
Lubrano, P.
Madejski, G. M.
Makeev, A.
Max-Moerbeck, W.
Mazziotta, M. N.
McEnery, J. E.
Mehault, J.
Michelson, P. F.
Mitthumsiri, W.
Mizuno, T.
Moiseev, A. A.
Monte, C.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Murgia, S.
Naumann-Godo, M.
Nishino, S.
Nolan, P. L.
Norris, J. P.
Nuss, E.
Ohsugi, T.
Okumura, A.
Omodei, N.
Orlando, E.
Ormes, J. F.
Paneque, D.
Panetta, J. H.
Parent, D.
Pavlidou, V.
Pearson, T. J.
Pelassa, V.
Pepe, M.
Pesce-Rollins, M.
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Moody, J. W.
Mori, Y.
Nestoras, I.
Orlati, A.
Pagani, C.
Pace, C.
Pearson, R., III
Perri, M.
Piner, B. G.
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CA Fermi-LAT Collaboration
MAGIC Collaboration
VERITAS Collaboration
TI INSIGHTS INTO THE HIGH-ENERGY gamma-RAY EMISSION OF MARKARIAN 501 FROM
EXTENSIVE MULTIFREQUENCY OBSERVATIONS IN THE FERMI ERA
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE acceleration of particles; BL Lacertae objects: general; BL Lacertae
objects: individual (Mrk 501); galaxies: active; gamma rays: general;
radiation mechanisms: non-thermal
ID BL LACERTAE OBJECTS; CHERENKOV TELESCOPE SYSTEM; MAGNETOSONIC
SHOCK-WAVES; ACTIVE GALACTIC NUCLEI; LOG-PARABOLIC SPECTRA; LARGE-AREA
TELESCOPE; EARLY-TYPE GALAXIES; X-RAY; PARTICLE-ACCELERATION; TEV
VARIABILITY
AB We report on the gamma-ray activity of the blazar Mrk 501 during the first 480 days of Fermi operation. We find that the average Large Area Telescope (LAT) gamma-ray spectrum of Mrk 501 can be well described by a single power-law function with a photon index of 1.78 +/- 0.03. While we observe relatively mild flux variations with the Fermi-LAT (within less than a factor of two), we detect remarkable spectral variability where the hardest observed spectral index within the LAT energy range is 1.52 +/- 0.14, and the softest one is 2.51 +/- 0.20. These unexpected spectral changes do not correlate with the measured flux variations above 0.3 GeV. In this paper, we also present the first results from the 4.5 month long multifrequency campaign (2009 March 15-August 1) on Mrk 501, which included the Very Long Baseline Array (VLBA), Swift, RXTE, MAGIC, and VERITAS, the F-GAMMA, GASP-WEBT, and other collaborations and instruments which provided excellent temporal and energy coverage of the source throughout the entire campaign. The extensive radio to TeV data set from this campaign provides us with the most detailed spectral energy distribution yet collected for this source during its relatively low activity. The average spectral energy distribution of Mrk 501 is well described by the standard one-zone synchrotron self-Compton (SSC) model. In the framework of this model, we find that the dominant emission region is characterized by a size less than or similar to 0.1 pc (comparable within a factor of few to the size of the partially resolved VLBA core at 15-43 GHz), and that the total jet power (similar or equal to 10(44) erg s(-1)) constitutes only a small fraction (similar to 10(-3)) of the Eddington luminosity. The energy distribution of the freshly accelerated radiating electrons required to fit the time-averaged data has a broken power-law form in the energy range 0.3 GeV-10 TeV, with spectral indices 2.2 and 2.7 below and above the break energy of 20 GeV. We argue that such a form is consistent with a scenario in which the bulk of the energy dissipation within the dominant emission zone of Mrk 501 is due to relativistic, proton-mediated shocks. We find that the ultrarelativistic electrons and mildly relativistic protons within the blazar zone, if comparable in number, are in approximate energy equipartition, with their energy dominating the jet magnetic field energy by about two orders of magnitude.
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[Bordas, P.; Bosch-Ramon, V.; Paredes, J. M.; Ribo, M.; Zabalza, V.] Univ Barcelona ICC IEED, E-08028 Barcelona, Spain.
[Bretz, T.; Elsaesser, D.; Hoehne-Moench, D.; Mannheim, K.; Ruegamer, S.; Spanier, F.; Storz, J.; Struebig, J. C.] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany.
[De Lotto, B.; De Maria, M.; De Sabata, F.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[De Lotto, B.; De Maria, M.; De Sabata, F.] Univ Trieste, I-34127 Trieste, Italy.
[Mendez, C. Delgado] Ctr Invest Energet Medioambientales & Tecnol CIE, Madrid, Spain.
[Dominguez, A.; Perez-Torres, M. A.; Prada, F.; Zandanel, F.] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain.
[Prester, D. Dominis; Ferenc, D.; Godinovi, N.; Hrupec, D.; Puljak, I.; Suric, T.; Terzic, T.] Univ Rijeka, Rudjer Boskovic Inst, Croatian MAGIC Consortium, HR-10000 Zagreb, Croatia.
[Font, L.] Univ Autonoma Barcelona, E-08193 Barcelona, Spain.
[Makariev, E.; Maneva, G.; Temnikov, P.; Vankov, H.] Inst Nucl Energy Res, BG-1784 Sofia, Bulgaria.
[Maraschi, L.; Tavecchio, F.] INAF Osservatorio Astron Brera, I-23807 Merate, Italy.
[Persic, M.] INAF Osservatorio Astron Trieste, I-34143 Trieste, Italy.
[Antonelli, L. A.; Bonnoli, G.; Carosi, A.; Covino, S.; La Barbera, A.; Salvati, M.; Spiro, S.] INAF Natl Inst Astrophys, I-00136 Rome, Italy.
[Shore, S. N.] Univ Pisa, Dipartimento Fis Enrico Fermi, I-56127 Pisa, Italy.
[Acciari, V. A.; Benbow, W.; Galante, N.; Perkins, J. S.; Roache, E.; Theiling, M.; Weekes, T. C.] Harvard Smithsonian Ctr Astrophys, Fred Lawrence Whipple Observ, Amado, AZ 85645 USA.
[Arlen, T.; Ong, R.; Weinstein, A.; Wood, M.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
[Boltuch, D.; Holder, J.] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA.
[Boltuch, D.; Holder, J.] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA.
[Bradbury, S. M.; Rose, H. J.] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England.
[Buckley, J. H.; Bugaev, V.; Dickherber, R.; Krawczynski, H.; McArthur, S.; Thibadeau, S.] Washington Univ, Dept Phys, St Louis, MO 63130 USA.
[Cesarini, A.; Gillanders, G. H.; Lang, M. J.] Natl Univ Ireland Galway, Galway, Ireland.
[Ciupik, L.; Fortson, L.; Grube, J.; Gyuk, G.; Karlsson, N.; Steele, D.] Adler Planetarium & Astron Museum, Chicago, IL 60605 USA.
[Cui, W.; Finley, J. P.; Gall, D.; Sembroski, G. H.; Varlotta, A.; Zitzer, B.; Lister, M. L.] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
[Errando, M.; Mukherjee, R.] Columbia Univ, Barnard Coll, Dept Phys & Astron, New York, NY 10027 USA.
[Falcone, A.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Finnegan, G.; Godambe, S.; Hui, C. M.; Kieda, D.; Vincent, S.] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA.
[Guenette, R.; Hanna, D.; Maier, G.; McCann, A.; McCutcheon, M.; Ragan, K.; Tesic, G.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
[Huang, D.; Konopelko, A.] Pittsburg State Univ, Dept Phys, Pittsburg, KS 66762 USA.
[Humensky, T. B.; Swordy, S. P.; Wakely, S. P.; Weisgarber, T.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Kaaret, P.; Pandel, D.] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
[Kertzman, M.] Depauw Univ, Dept Phys & Astron, Greencastle, IN 46135 USA.
[Krennrich, F.; Schroedter, M.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Moriarty, P.] Galway Mayo Inst Technol, Dept Life & Phys Sci, Galway, Ireland.
[Pichel, A.; Rovero, A. C.] Parbellon IAFE, Inst Astron & Fis Espacio, Buenos Aires, DF, Argentina.
[Pohl, M.] Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany.
[Reyes, L. C.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
[Reynolds, P. T.] Cork Inst Technol, Dept Appl Phys & Instrumentat, Cork, Ireland.
[Senturk, G. D.] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA.
[Steele, D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Villata, M.; Raiteri, C. M.] Osserv Astron Torino, INAF, I-10025 Pino Torinese, TO, Italy.
[Aller, H. D.; Aller, M. F.] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
[Arkharov, A. A.; Blinov, D. A.; Efimova, N. V.; Larionov, V. M.; Pushkarev, A. B.] Pulkovo Observ, St Petersburg 196140, Russia.
[Chen, W. P.; Koptelova, E.] Natl Cent Univ, Grad Inst Astron, Jhongli 32054, Taiwan.
[Efimova, N. V.; Konstantinova, T. S.; Kopatskaya, E. N.; Larionov, V. M.; Larionova, E. G.; Larionova, L. V.; Morozova, D. A.; Nikolashvili, M. G.; Troitsky, I. S.] St Petersburg State Univ, Astron Inst, St Petersburg, Russia.
[Kimeridze, G.; Kurtanidze, O. M.; Kurtanidze, S. O.; Sigua, L. A.] Abastumani Observ, GE-0301 Abastumani, Rep of Georgia.
[Lahteenmaki, A.; Tornikoski, M.] Aalto Univ, Metsahovi Radio Observ, FIN-02540 Kylmala, Finland.
[Larionov, V. M.] Isaac Newton Inst Chile, St Petersburg Branch, St Petersburg, Russia.
[Ligustri, R.] Circolo Astrofili Talmassons, I-33030 Campoformido, UD, Italy.
[Carraminana, A.; Carrasco, L.] Inst Nacl Astrofis Opt & Electr, Puebla 72840, Mexico.
[Cassaro, P.] Ist Radioastron, Sez Noto, INAF, I-96017 Noto, SR, Italy.
[de la Fuente, E.] Univ Guadalajara, CUCEI, Dpto Fis, Inst Astron & Meteorol, Jalisco, Mexico.
[Gurwell, M. A.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Leto, P.] Osserv Astrofis Catania, I-95123 Catania, Italy.
[Maccaferri, G.; Orlati, A.] Ist Radioastron, INAF, Staz Radioastron Med, I-40059 Bologna, Italy.
[Moody, J. W.; Pace, C.; Pearson, R., III] Brigham Young Univ, Dept Phys & Astron, Provo, UT 84602 USA.
[Mori, Y.; Yatsu, Y.] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan.
[Pagani, C.] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
[Piner, B. G.] Whittier Coll, Dept Phys & Astron, Whittier, CA USA.
[Pushkarev, A. B.] Crimean Astrophys Observ, UA-98409 Nauchnyi, Crimea, Ukraine.
[Ros, E.] Univ Valencia, Valencia 46010, Spain.
[Sadun, A. C.] Univ Colorado, Dept Phys, Denver, CO 80220 USA.
[Zook, A.] Pomona Coll, Dept Phys & Astron, Claremont, CA 91711 USA.
[Conrad, J.] Royal Swedish Acad Sci, Stockholm, Sweden.
RP Paneque, D (reprint author), Stanford Univ, Dept Phys, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA.
EM dpaneque@mppmu.mpg.de; stawarz@astro.isas.jaxa.jp
RI Tosti, Gino/E-9976-2013; Larionov, Valeri/H-1349-2013; Kopatskaya,
Evgenia/H-4720-2013; Larionova, Elena/H-7287-2013; Efimova,
Natalia/I-2196-2013; Blinov, Dmitry/G-9925-2013; Rando,
Riccardo/M-7179-2013; Lahteenmaki, Anne/L-5987-2013; Hays,
Elizabeth/D-3257-2012; Johnson, Neil/G-3309-2014; Kurtanidze,
Omar/J-6237-2014; Rico, Javier/K-8004-2014; Fernandez,
Ester/K-9734-2014; Lopez Moya, Marcos/L-2304-2014; GAug,
Markus/L-2340-2014; Moralejo Olaizola, Abelardo/M-2916-2014; Ribo,
Marc/B-3579-2015; Kovalev, Yuri/J-5671-2013; Funk, Stefan/B-7629-2015;
Pavlidou, Vasiliki/C-2944-2011; Sokolovsky, Kirill/D-2246-2015;
Antoranz, Pedro/H-5095-2015; Delgado, Carlos/K-7587-2014; Nieto,
Daniel/J-7250-2015; Kovalev, Yuri/N-1053-2015; Pearson,
Timothy/N-2376-2015; Prada Moroni, Pier Giorgio/G-5565-2011; giglietto,
nicola/I-8951-2012; Braun, Isabel/C-9373-2012; Reimer, Olaf/A-3117-2013;
Thompson, David/D-2939-2012; Gehrels, Neil/D-2971-2012; McEnery,
Julie/D-6612-2012; Baldini, Luca/E-5396-2012; Mannheim,
Karl/F-6705-2012; lubrano, pasquale/F-7269-2012; Morselli,
Aldo/G-6769-2011; Kuss, Michael/H-8959-2012; Doro, Michele/F-9458-2012;
Morozova, Daria/H-1298-2013; Troitskiy, Ivan/K-7979-2013; Grishina,
Tatiana/H-6873-2013; Loparco, Francesco/O-8847-2015; Johannesson,
Gudlaugur/O-8741-2015; Gargano, Fabio/O-8934-2015; Pushkarev,
Alexander/M-9997-2015; Miranda, Jose Miguel/F-2913-2013; Font,
Lluis/L-4197-2014; Moskalenko, Igor/A-1301-2007; Contreras Gonzalez,
Jose Luis/K-7255-2014; Mazziotta, Mario /O-8867-2015; Sgro,
Carmelo/K-3395-2016; Maneva, Galina/L-7120-2016; Backes,
Michael/N-5126-2016; Torres, Diego/O-9422-2016; Temnikov,
Petar/L-6999-2016; Orlando, E/R-5594-2016; Barrio, Juan/L-3227-2014;
Cortina, Juan/C-2783-2017; Fonseca Gonzalez, Maria Victoria/I-2004-2015;
OI Larionov, Valeri/0000-0002-4640-4356; Kopatskaya,
Evgenia/0000-0001-9518-337X; Larionova, Elena/0000-0002-2471-6500;
Efimova, Natalia/0000-0002-8071-4753; Blinov,
Dmitry/0000-0003-0611-5784; Rico, Javier/0000-0003-4137-1134; Lopez
Moya, Marcos/0000-0002-8791-7908; GAug, Markus/0000-0001-8442-7877;
Moralejo Olaizola, Abelardo/0000-0002-1344-9080; Kovalev,
Yuri/0000-0001-9303-3263; Funk, Stefan/0000-0002-2012-0080; Pavlidou,
Vasiliki/0000-0002-0870-1368; Sokolovsky, Kirill/0000-0001-5991-6863;
Antoranz, Pedro/0000-0002-3015-3601; Delgado,
Carlos/0000-0002-7014-4101; Nieto, Daniel/0000-0003-3343-0755; Pearson,
Timothy/0000-0001-5213-6231; giglietto, nicola/0000-0002-9021-2888;
Braun, Isabel/0000-0002-9389-0502; Reimer, Olaf/0000-0001-6953-1385;
Thompson, David/0000-0001-5217-9135; lubrano,
pasquale/0000-0003-0221-4806; Morselli, Aldo/0000-0002-7704-9553; Doro,
Michele/0000-0001-9104-3214; Morozova, Daria/0000-0002-9407-7804;
Troitskiy, Ivan/0000-0002-4218-0148; Grishina,
Tatiana/0000-0002-3953-6676; Loparco, Francesco/0000-0002-1173-5673;
Johannesson, Gudlaugur/0000-0003-1458-7036; Gargano,
Fabio/0000-0002-5055-6395; Miranda, Jose Miguel/0000-0002-1472-9690;
Font, Lluis/0000-0003-2109-5961; Moskalenko, Igor/0000-0001-6141-458X;
Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Mazziotta, Mario
/0000-0001-9325-4672; Backes, Michael/0000-0002-9326-6400; Torres,
Diego/0000-0002-1522-9065; Temnikov, Petar/0000-0002-9559-3384; Barrio,
Juan/0000-0002-0965-0259; Cortina, Juan/0000-0003-4576-0452; Villata,
Massimo/0000-0003-1743-6946; Larionova, Liudmila/0000-0002-0274-1481;
Leto, Paolo/0000-0003-4864-2806; Cassaro, Pietro/0000-0001-5139-9662;
Giordano, Francesco/0000-0002-8651-2394; Orlati,
Andrea/0000-0001-8737-255X; Prada Moroni, Pier
Giorgio/0000-0001-9712-9916; De Angelis, Alessandro/0000-0002-3288-2517;
LA BARBERA, ANTONINO/0000-0002-5880-8913; Cui, Wei/0000-0002-6324-5772;
Frailis, Marco/0000-0002-7400-2135; Cesarini,
Andrea/0000-0002-8611-8610; leonardo, elvira/0000-0003-0271-7673;
Fonseca Gonzalez, Maria Victoria/0000-0003-2235-0725; Caraveo,
Patrizia/0000-0003-2478-8018; De Lotto, Barbara/0000-0003-3624-4480;
Sgro', Carmelo/0000-0001-5676-6214; SPINELLI, Paolo/0000-0001-6688-8864;
Rando, Riccardo/0000-0001-6992-818X; Persic,
Massimo/0000-0003-1853-4900; Ward, John E/0000-0003-1973-0794
FU K. A. Wallenberg Foundation; International Doctorate on Astroparticle
Physics (IDAPP) program; INFN Padova; Academy of Finland [212656,
210338]; National Radio Astronomy Observatory's Very Long Baseline Array
(VLBA) [BK150, BP143, MOJAVE]; Russian RFBR foundation [09-02-00092];
Georgian National Science Foundation [GNSF/ST07/4-180]; NASA
[NNX08AW31G]; NSF [AST-0808050]
FX Royal Swedish Academy of Sciences Research Fellow, funded by a grant
from the K. A. Wallenberg Foundation.; Partially supported by the
International Doctorate on Astroparticle Physics (IDAPP) program.;
Supported by INFN Padova.; We acknowledge the use of public data from
the Swift and RXTE data archive. The Metsahovi team acknowledges the
support from the Academy of Finland to the observing projects (numbers
212656, 210338, among others). This research has made use of data
obtained from the National Radio Astronomy Observatory's Very Long
Baseline Array (VLBA), projects BK150, BP143, and MOJAVE. The National
Radio Astronomy Observatory is a facility of the National Science
Foundation operated under cooperative agreement by Associated
Universities, Inc. St. Petersburg University team acknowledges support
from Russian RFBR foundation via grant 09-02-00092. AZT-24 observations
are made within an agreement between Pulkovo, Rome and Teramo
observatories. This research is partly based on observations with the
100-m telescope of the MPIfR (Max-Planck-Institut fur Radioastronomie)
at Effelsberg, as well as with the Medicina and Noto telescopes operated
by INAF-Istituto di Radioastronomia. The Submillimeter Array is a joint
project between the Smithsonian Astrophysical Observatory and the
Academia Sinica Institute of Astronomy and Astrophysics and is funded by
the Smithsonian Institution and the Academia Sinica. M. Villata
organized the optical-to-radio observations by GASP-WEBT as the
president of the collaboration. Abastumani Observatory team acknowledges
financial support by the Georgian National Science Foundation through
grant GNSF/ST07/4-180. The OVRO 40 m program was funded in part by NASA
(NNX08AW31G) and the NSF (AST-0808050).
NR 122
TC 92
Z9 92
U1 4
U2 39
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 1
PY 2011
VL 727
IS 2
AR 129
DI 10.1088/0004-637X/727/2/129
PG 26
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 712JE
UT WOS:000286662000068
ER
PT J
AU Fischer, TC
Crenshaw, DM
Kraemer, SB
Schmitt, HR
Mushotsky, RF
Dunn, JP
AF Fischer, T. C.
Crenshaw, D. M.
Kraemer, S. B.
Schmitt, H. R.
Mushotsky, R. F.
Dunn, J. P.
TI HUBBLE SPACE TELESCOPE OBSERVATIONS OF THE DOUBLE-PEAKED EMISSION LINES
IN THE SEYFERT GALAXY MARKARIAN 78: MASS OUTFLOWS FROM A SINGLE ACTIVE
GALACTIC NUCLEUS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: individual (Mrk 78); galaxies: Seyfert
ID JET-GAS INTERACTIONS; O-III LAMBDA-5007; IONIZED-GAS; NGC 1068; REGION;
KINEMATICS; NGC-1068; DIRECTIONS; EXTINCTION; DISCOVERY
AB Previous ground-based observations of the Seyfert 2 galaxy Mrk 78 revealed a double set of emission lines, similar to those seen in several active galactic nuclei (AGNs) from recent surveys. Are the double lines due to two AGNs with different radial velocities in the same galaxy, or are they due to mass outflows from a single AGN? We present a study of the outflowing ionized gas in the resolved narrow-line region (NLR) of Mrk 78 using observations from the Space Telescope Imaging Spectrograph (STIS) and Faint Object Camera aboard the Hubble Space Telescope as part of an ongoing project to determine the kinematics and geometries of AGN outflows. From the spectroscopic information, we determined the fundamental geometry of the outflow via our kinematics modeling program by recreating radial velocities to fit those seen in four different STIS slit positions. We determined that the double emission lines seen in ground-based spectra are due to an asymmetric distribution of outflowing gas in the NLR. By successfully fitting a model for a single AGN to Mrk 78, we show that it is possible to explain double emission lines with radial velocity offsets seen in AGN similar to Mrk 78 without requiring dual supermassive black holes.
C1 [Fischer, T. C.; Crenshaw, D. M.] Georgia State Univ, Dept Phys & Astron, Astron Off, Atlanta, GA 30303 USA.
[Kraemer, S. B.] Catholic Univ Amer, Inst Astrophys & Computat Sci, Dept Phys, Washington, DC 20064 USA.
[Schmitt, H. R.] Computat Phys Inc, Springfield, VA 22151 USA.
[Schmitt, H. R.] USN, Res Lab, Washington, DC 20375 USA.
[Mushotsky, R. F.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Dunn, J. P.] Augusta State Univ, Dept Chem & Phys, Augusta, GA 30904 USA.
RP Fischer, TC (reprint author), Georgia State Univ, Dept Phys & Astron, Astron Off, 1 Pk Pl S SE,Suite 700, Atlanta, GA 30303 USA.
EM fischer@chara.gsu.edu
FU NASA [NAS 5-26555]
FX Based on observations made with the NASA/ESA Hubble Space Telescope,
obtained at the Space Telescope Science Institute, which is operated by
the Association of Universities for Research in Astronomy, Inc. under
NASA contract NAS 5-26555.
NR 39
TC 49
Z9 50
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 1
PY 2011
VL 727
IS 2
AR 71
DI 10.1088/0004-637X/727/2/71
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 712JE
UT WOS:000286662000010
ER
PT J
AU Strycharz, SM
Glaven, RH
Coppi, MV
Gannon, SM
Perpetua, LA
Liu, A
Nevin, KP
Lovley, DR
AF Strycharz, Sarah M.
Glaven, Richard H.
Coppi, Maddalena V.
Gannon, Sarah M.
Perpetua, Lorrie A.
Liu, Anna
Nevin, Kelly P.
Lovley, Derek R.
TI Gene expression and deletion analysis of mechanisms for electron
transfer from electrodes to Geobacter sulfurreducens
SO BIOELECTROCHEMISTRY
LA English
DT Article
DE Microbial fuel cell; Geobacter sulfurreducens; Cathode; Electron donor;
Microarray
ID MICROBIAL FUEL-CELLS; REDUCED NEUTRAL RED; C-TYPE CYTOCHROME; REDUCTIVE
DECHLORINATION; FE(III) REDUCTION; SUBSURFACE ENVIRONMENTS;
ELECTRICITY-GENERATION; ANAEROBIC RESPIRATION; OXIDATIVE STRESS;
ORGANIC-MATTER
AB Geobacter sulfurreducens is one of the few microorganisms available in pure culture known to directly accept electrons from a negatively poised electrode. Microarray analysis was used to compare gene transcript abundance in biofilms of G. sulfurreducens using a graphite electrode as the sole electron donor for fumarate reduction compared with transcript abundance in biofilms growing on the same material, but not consuming current. Surprisingly, genes for putative cell-electrode connections, such as outer-surface cytochromes and pili. which are highly expressed in current-producing biofilms, were not highly expressed in current-consuming biofilms. Microarray analysis of G. sulfurreducens gene transcript abundance in current-consuming biofilms versus current-producing biofilms gave similar results. In both comparative studies current-consuming biofilms had greater transcript abundance for a gene (GSU3274) encoding a putative monoheme, c-type cytochrome. Deletion of genes for outer-surface proteins previously shown to be essential for optimal electron transfer to electrodes had no impact on electron transfer from electrodes. Deletion of GSU3274 completely inhibited electron transfer from electrodes, but had no impact on electron transfer to electrodes. These differences in gene expression patterns and the impact of gene deletions suggest that the mechanisms for electron transfer from electrodes to G. sulfurreducens differ significantly from the mechanisms for electron transfer to electrodes. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Strycharz, Sarah M.; Glaven, Richard H.; Coppi, Maddalena V.; Gannon, Sarah M.; Perpetua, Lorrie A.; Liu, Anna; Nevin, Kelly P.; Lovley, Derek R.] Univ Massachusetts, Dept Microbiol, Morrill Sci Ctr IVN 203N, Amherst, MA 01003 USA.
RP Strycharz, SM (reprint author), USN, Res Lab, Ctr Bio Mol Sci & Engn, Bldg 42,Room 304,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM sarah.strycharz.ctr@nrl.navy.mil
FU Office of Science (BER), U. S. Department of Energy [DE-FC02-02ER63446];
Office of Naval Research [N00014-10-1-0084]
FX This research was supported by the Office of Science (BER), U. S.
Department of Energy, Cooperative Agreement No. DE-FC02-02ER63446 and
Office of Naval Research Grant N00014-10-1-0084.
NR 71
TC 61
Z9 64
U1 6
U2 58
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 1567-5394
J9 BIOELECTROCHEMISTRY
JI Bioelectrochemistry
PD FEB
PY 2011
VL 80
IS 2
BP 142
EP 150
DI 10.1016/j.bioelechem.2010.07.005
PG 9
WC Biochemistry & Molecular Biology; Biology; Biophysics; Electrochemistry
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Biophysics; Electrochemistry
GA 715AA
UT WOS:000286851600007
PM 20696622
ER
PT J
AU Poludnenko, AY
Oran, ES
AF Poludnenko, A. Y.
Oran, E. S.
TI The interaction of high-speed turbulence with flames: Turbulent flame
speed
SO COMBUSTION AND FLAME
LA English
DT Article
DE Turbulent premixed combustion; Turbulence; Flamelet; Turbulent flame
speed; Hydrogen-air combustion
ID HYPERBOLIC CONSERVATION-LAWS; NUMERICAL-SIMULATION; PREMIXED COMBUSTION;
IA SUPERNOVAE; MHD; DISSIPATION; CHEMISTRY; TRANSPORT
AB Direct numerical simulations of the interaction of a premixed flame with driven, subsonic, homogeneous, isotropic, Kolmogorov-type turbulence in an unconfined system are used to study the mechanisms determining the turbulent flame speed. S-T, in the thin reaction zone regime. High intensity turbulence is considered with the r.m.s. velocity 35 times the laminar flame speed, S-L, resulting in the Damkohler number Da = 0.05. The simulations were performed with Athena-RFX, a massively parallel, fully compressible, high-order, dimensionally unsplit, reactive-flow code. A simplified reaction-diffusion model, based on the one-step Arrhenius kinetics, represents a stoichiometric H-2-air mixture under the assumption of the Lewis number Le = 1. Global properties and the internal structure of the flame were analyzed in an earlier paper, which showed that this system represents turbulent combustion in the thin reaction zone regime. This paper demonstrates that: (1) The flame brush has a complex internal structure, in which the isosurfaces of higher fuel mass fractions are folded on progressively smaller scales. (2) Global properties of the turbulent flame are best represented by the structure of the region of peak reaction rate, which defines the flame surface. (3) In the thin reaction zone regime, S-T is predominantly determined by the increase of the flame surface area, A(T), caused by turbulence. (4) The observed increase of S-T relative to S-L exceeds the corresponding increase of A(T) relative to the surface area of the planar laminar flame, on average, by approximate to 14%, varying from only a few percent to as high as approximate to 30%. (5) This exaggerated response is the result of tight flame packing by turbulence, which causes frequent flame collisions and formation of regions of high flame curvature greater than or similar to 1/delta(L), or "cusps," where delta(L) is the thermal width of the laminar flame. (6) The local flame speed in the cusps substantially exceeds its laminar value, which results in a disproportionately large contribution of cusps to S-T compared with the flame surface area in them. (7) A criterion is established for transition to the regime significantly influenced by cusp formation. In particular, at Karlovitz numbers Ka greater than or similar to 20, flame collisions provide an important mechanism controlling S-T, in addition to the increase of A(T) by large-scale motions and the potential enhancement of diffusive transport by small-scale turbulence. Published by Elsevier Inc. on behalf of The Combustion Institute.
C1 [Poludnenko, A. Y.; Oran, E. S.] USN, Res Lab, Lab Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
RP Poludnenko, AY (reprint author), USN, Res Lab, Lab Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
EM apol@lcp.nrl.navy.mil
FU Naval Research Laboratory, the Office of Naval Research, the Air Force
Office of Scientific Research [F1ATA09114G005]; National Science
Foundation [TG-AST080006N]
FX We are deeply grateful to Forman Williams for numerous valuable inputs
that have greatly improved this paper. We also thank Craig Wheeler,
Vadim Gamezo, and James Driscoll for stimulating discussions. This work
was supported in part by the Naval Research Laboratory, the Office of
Naval Research, the Air Force Office of Scientific Research under the
Grant F1ATA09114G005, and by the National Science Foundation through
TeraGrid resources provided by NCSA and TACC under the Grant
TG-AST080006N. Additional computing facilities were provided by the
Department of Defense High Performance Computing Modernization Program.
We also gratefully acknowledge the hospitality and support of the Nordic
Institute for Theoretical Physics, and in particular of Axel
Brandenburg, during the "Turbulent Combustion" program where parts of
this work were done.
NR 44
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U1 1
U2 28
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0010-2180
J9 COMBUST FLAME
JI Combust. Flame
PD FEB
PY 2011
VL 158
IS 2
BP 301
EP 326
DI 10.1016/j.combustflame.2010.09.002
PG 26
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 710ZU
UT WOS:000286556300010
ER
PT J
AU Mahmoud, KD
de Smet, BJGL
Zijlstra, F
Rihal, CS
Holmes, DR
AF Mahmoud, Karim D.
de Smet, Bart J. G. L.
Zijlstra, Felix
Rihal, Charanjit S.
Holmes, David R., Jr.
TI Sudden Cardiac Death: Epidemiology, Circadian Variation, and Triggers
SO CURRENT PROBLEMS IN CARDIOLOGY
LA English
DT Review
ID ACUTE MYOCARDIAL-INFARCTION; VENTRICULAR SYSTOLIC DYSFUNCTION; MULTIPLE
SOURCE SURVEILLANCE; ACUTE CARDIOVASCULAR-DISEASE; POPULATION-BASED
ANALYSIS; CORONARY-ARTERY-DISEASE; BLOOD-PRESSURE; RISK STRATIFICATION;
UNEXPECTED DEATH; HEART-DISEASE
AB Sudden cardiac death (SCD) remains a major health issue accounting for over 5% of annual mortality in the Western world. There are several causes of SCD, most commonly, coronary artery disease. Although identifying the prodrome of SCD has attracted considerable interest, a large proportion of patients die before any medical contact is established. SCD onset seems to follow a circadian pattern, most likely because of exposure to endogenous and exogenous triggers. The aim of the present report is to review the current knowledge of epidemiology, patterns of onset, and triggers of SCD and present directions for future research with a focus on coronary artery disease. (Curr Probl Cardiol 2011; 36:56-80.)
C1 [Mahmoud, Karim D.; de Smet, Bart J. G. L.] Univ Groningen, Univ Med Ctr Groningen, Cardiac Catheterizat Lab, NL-9713 AV Groningen, Netherlands.
[Mahmoud, Karim D.] Mayo Clin, Dept Cardiovasc Dis, Rochester, MN USA.
[de Smet, Bart J. G. L.] Emory Univ, Atlanta, GA 30322 USA.
[de Smet, Bart J. G. L.] Eemland Hosp, Amersfoort, Netherlands.
[de Smet, Bart J. G. L.] Univ Med Ctr Utrecht, Utrecht, Netherlands.
[Zijlstra, Felix] Erasmus MC, Dept Cardiol, Rotterdam, Netherlands.
[Zijlstra, Felix] Weezenlanden Hosp, Zwolle, Netherlands.
[Zijlstra, Felix] Univ Groningen, Univ Med Ctr Groningen, Ctr Thorax, NL-9713 AV Groningen, Netherlands.
[Rihal, Charanjit S.] Mayo Clin, Div Cardiovasc Dis, Rochester, MN USA.
[Holmes, David R., Jr.] Mayo Clin, Coll Med, Rochester, MN USA.
[Holmes, David R., Jr.] Mayo Clin & Mayo Fdn, Dept Internal Med, Div Cardiovasc Dis, Rochester, MN USA.
[Holmes, David R., Jr.] Virginia Mason Hosp, Seattle, WA USA.
[Holmes, David R., Jr.] USN, Natl Naval Med Ctr, Bethesda, MD 20084 USA.
RP Mahmoud, KD (reprint author), Univ Groningen, Univ Med Ctr Groningen, Cardiac Catheterizat Lab, NL-9713 AV Groningen, Netherlands.
FU Netherlands Heart Foundation (The Hague, the Netherlands); Groningen
University Fund (Groningen, the Netherlands); Marco Polo Fund
(Groningen, the Netherlands); Jan Kornelis de Kock Foundation
(Groningen, the Netherlands)
FX Grant sponsors (to KDM): Netherlands Heart Foundation (The Hague, the
Netherlands), Groningen University Fund (Groningen, the Netherlands),
Marco Polo Fund (Groningen, the Netherlands), Jan Kornelis de Kock
Foundation (Groningen, the Netherlands).
NR 91
TC 5
Z9 8
U1 0
U2 5
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0146-2806
J9 CURR PROB CARDIOLOGY
JI Curr. Probl. Cardiol.
PD FEB
PY 2011
VL 36
IS 2
BP 56
EP 80
DI 10.1016/j.cpcardiol.2011.01.002
PG 25
WC Cardiac & Cardiovascular Systems
SC Cardiovascular System & Cardiology
GA 735JF
UT WOS:000288409500002
PM 21356429
ER
PT J
AU Wichman, CL
Ehlers, SL
Wichman, SE
Weaver, AL
Coddington, C
AF Wichman, Christina L.
Ehlers, Shawna L.
Wichman, Scott E.
Weaver, Amy L.
Coddington, Charles
TI Comparison of multiple psychological distress measures between men and
women preparing for in vitro fertilization
SO FERTILITY AND STERILITY
LA English
DT Article
DE Infertility; in vitro fertilization; psychological distress; depression;
anxiety; stress
ID ARTIFICIAL-INSEMINATION; INVITRO FERTILIZATION; DONOR INSEMINATION;
LESBIAN COUPLES; EMBRYO TRANSFER; SINGLE WOMEN; INFERTILITY; STRESS;
IVF; ADJUSTMENT
AB Objective: To compare multiple measures of psychological distress between men and women preparing for IVF.
Design: Retrospective cohort study.
Setting: Outpatient, academic infertility clinic.
Patient(s): One hundred sixty-two consecutive couples presenting for infertility treatment with IVF.
Intervention(s): Measures were completed as part of a routine, infertility-focused psychological evaluation, including the Beck Depression Inventory, State-Trait Anxiety Inventory, State-Trait Anger Inventory, and Impact of Events Scale.
Main Outcome Measure(s): Scores of above psychological questionnaires.
Result(s): Psychological distress scores were statistically significantly higher among women than men for symptoms of depression, state anxiety, infertility specific distress, and general perceived stress. However, aside from infertility-specific distress (d = .43), effect sizes for the paired differences between females and males ranged from d = .18 to .23.
Conclusion(s): Women consistently scored higher on multiple measures of psychological distress than their male partners in the context of preparing for IVF. Comparison of infertility-specific distress scores yielded the largest statistically and clinically significant difference compared with traditional measures of general depression and anxiety symptoms. (Fertil Steril(R) 2011;95:717-21. (C) 2011 by American Society for Reproductive Medicine.)
C1 [Wichman, Christina L.] Med Coll Wisconsin, Dept Psychiat & Behav Med, Milwaukee, WI 53226 USA.
[Ehlers, Shawna L.] Mayo Clin, Dept Psychiat & Psychol, Rochester, MN USA.
[Wichman, Scott E.] USN, Great Lakes, IL USA.
[Weaver, Amy L.] Mayo Clin, Dept Biostat, Rochester, MN USA.
[Coddington, Charles] Mayo Clin, Dept Obstet & Gynecol, Rochester, MN USA.
RP Wichman, CL (reprint author), Med Coll Wisconsin, Dept Psychiat & Behav Med, 1155 N Mayfair Rd, Milwaukee, WI 53226 USA.
EM cwichman@mcw.edu
NR 25
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Z9 33
U1 2
U2 13
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0015-0282
J9 FERTIL STERIL
JI Fertil. Steril.
PD FEB
PY 2011
VL 95
IS 2
BP 717
EP 721
DI 10.1016/j.fertnstert.2010.09.043
PG 5
WC Obstetrics & Gynecology; Reproductive Biology
SC Obstetrics & Gynecology; Reproductive Biology
GA 709EA
UT WOS:000286419000060
PM 21067728
ER
PT J
AU Wallace, DL
AF Wallace, Donald L.
TI Hermann Broch's literary Friendships
SO GERMAN STUDIES REVIEW
LA English
DT Book Review
C1 [Wallace, Donald L.] USN Acad, Annapolis, MD 21402 USA.
RP Wallace, DL (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU ARIZ STATE UNIV
PI TEMPE
PA ARIZONA STATE UNIV, BOX 873204, TEMPE, AZ 85287-3204 USA
SN 0149-7952
J9 GER STUD REV
JI Ger. Stud. Rev.
PD FEB
PY 2011
VL 34
IS 1
BP 223
EP 224
PG 2
WC Area Studies; Humanities, Multidisciplinary
SC Area Studies; Arts & Humanities - Other Topics
GA 725YI
UT WOS:000287682400058
ER
PT J
AU Gao, XS
Zhang, TT
Zhou, J
Graham, SM
Hayden, M
Roe, C
AF Gao, Xiaosheng
Zhang, Tingting
Zhou, Jun
Graham, Stephen M.
Hayden, Matthew
Roe, Charles
TI On stress-state dependent plasticity modeling: Significance of the
hydrostatic stress, the third invariant of stress deviator and the
non-associated flow rule
SO INTERNATIONAL JOURNAL OF PLASTICITY
LA English
DT Article
DE Plasticity modeling; Stress triaxiality; Lode angle; Modified Gurson
model; Non-associated flow rule
ID DEFORMATION-BEHAVIOR; NUMERICAL-SIMULATION; FRACTURE INITIATION; DUCTILE
MATERIALS; YIELD CRITERION; PRESSURE; SOLIDS; METALS; LOCALIZATION;
FRICTION
AB It has been shown that the plastic response of many materials, including some metallic alloys, depends on the stress state. In this paper, we describe a plasticity model for isotropic materials, which is a function of the hydrostatic stress as well as the second and third invariants of the stress deviator, and present its finite element implementation, including integration of the constitutive equations using the backward Euler method and formulation of the consistent tangent moduli. Special attention is paid for the adoption of the non-associated flow rule. As an application, this model is calibrated and verified for a 5083 aluminum alloy. Furthermore, the Gurson-Tvergaard-Needleman porous plasticity model, which is widely used to simulate the void growth process of ductile fracture, is extended to include the effects of hydrostatic stress and the third invariant of stress deviator on the matrix material. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Gao, Xiaosheng; Zhang, Tingting; Zhou, Jun] Univ Akron, Dept Mech Engn, Akron, OH 44325 USA.
[Graham, Stephen M.] USN Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
[Hayden, Matthew; Roe, Charles] USN, Alloy Dev & Mech Branch, Ctr Surface Warfare, Bethesda, MD 20817 USA.
RP Gao, XS (reprint author), Univ Akron, Dept Mech Engn, Akron, OH 44325 USA.
EM xgao@uakron.edu
FU Office of Naval Research [N00014-09-1-0553]
FX This research is made possible by the funding from the Office of Naval
Research N00014-09-1-0553 (Program Manager: Dr. Paul Hess).
NR 51
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U1 3
U2 33
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0749-6419
J9 INT J PLASTICITY
JI Int. J. Plast.
PD FEB
PY 2011
VL 27
IS 2
BP 217
EP 231
DI 10.1016/j.ijplas.2010.05.004
PG 15
WC Engineering, Mechanical; Materials Science, Multidisciplinary; Mechanics
SC Engineering; Materials Science; Mechanics
GA 689IR
UT WOS:000284921800004
ER
PT J
AU Chowdhury, I
Chandrasekhar, MVS
Klein, PB
Caldwell, JD
Sudarshan, T
AF Chowdhury, Iftekhar
Chandrasekhar, M. V. S.
Klein, Paul B.
Caldwell, Joshua D.
Sudarshan, Tangali
TI High growth rate 4H-SiC epitaxial growth using dichlorosilane in a
hot-wall CVD reactor
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE Doping; Etching; Chemical vapor deposition processes; Hot-wall epitaxy;
Semiconducting materials
ID CHEMICAL-VAPOR-DEPOSITION; GAS-PHASE NUCLEATION; SURFACE-MORPHOLOGY;
SILICON PRECURSOR; HIGH-PURITY; EPILAYERS; FILMS; 4H
AB Thick, high quality 4H-SiC epilayers have been grown in a vertical hot-wall chemical vapor deposition system at a high growth rate on (0 0 0 1)8 degrees off-axis substrates. We discuss the use of dichlorosilane as the Si-precursor for 4H-SiC epitaxial growth as it provides the most direct decomposition route into SiCl2, which is the predominant growth species in chlorinated chemistries. A specular surface morphology was attained by limiting the hydrogen etch rate until the system was equilibrated at the desired growth temperature. The RMS roughness of the grown films ranged from 0.5-2.0 nm with very few morphological defects (carrots, triangular defects, etc.) being introduced, while enabling growth rates of 30-100 mu m/h, 5-15 times higher than most conventional growths. Site-competition epitaxy was observed over a wide range of C/Si ratios, with doping concentrations < 1 x 10(14) cm(-3) being recorded. X-ray rocking curves indicated that the epilayers were of high crystallinity, with linewidths as narrow as 7.8 arcsec being observed, while microwave photoconductive decay (mu PCD) measurements indicated that these films had high injection (ambipolar) carrier lifetimes in the range of 2 mu s. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Chowdhury, Iftekhar; Chandrasekhar, M. V. S.; Sudarshan, Tangali] Univ S Carolina, Dept Elect Engn, Columbia, SC 29208 USA.
[Klein, Paul B.; Caldwell, Joshua D.] USN, Res Lab, Washington, DC 20375 USA.
RP Sudarshan, T (reprint author), Univ S Carolina, Dept Elect Engn, 301 S Main St,Rm 3A80, Columbia, SC 29208 USA.
EM chowdhui@cec.sc.edu
RI Caldwell, Joshua/B-3253-2008
OI Caldwell, Joshua/0000-0003-0374-2168
FU Office of Naval Research [N000140910619]
FX This work was supported by the Office of Naval Research, Grant no.
N000140910619. The authors thank contract monitor Dr. H. Scott Coombe of
ONR for his support in this research. The authors also thank Dr. Chris
Williams for the use of his Raman Spectroscopy setup and Dr. Peter
Muzykov for his assistance in the XRD measurements.
NR 33
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U1 5
U2 22
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD FEB 1
PY 2011
VL 316
IS 1
BP 60
EP 66
DI 10.1016/j.jcrysgro.2010.11.128
PG 7
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA 724EJ
UT WOS:000287558600013
ER
PT J
AU Sanders, BF
Bradford, SF
AF Sanders, Brett F.
Bradford, Scott F.
TI Network Implementation of the Two-Component Pressure Approach for
Transient Flow in Storm Sewers
SO JOURNAL OF HYDRAULIC ENGINEERING-ASCE
LA English
DT Article
DE Sewer model; Godunov-type method; Finite volume method; St. Venant
equations; Free-surface flow; Pressurized flow
ID SHALLOW-WATER EQUATIONS; HIGH-RESOLUTION; FREE-SURFACE; MODEL;
SIMULATION; PIPES; INTEGRATION; TRANSITION; POROSITY; SYSTEMS
AB The two-component pressure approach (TPA) is an alternative to the Preissman slot method (PSM) for modeling highly transient sewer flow, including transitions between free-surface and pressurized conditions. TPA and PSM resolve intralink wave action by discretizing sewers with numerous elements and solving one-dimensional flow equations in contrast to link-node models, such as the popular storm water management model, which resolve only interlink wave action. Here, improvements of TPA are reported to support storm sewer network modeling. These include a source term discretization to preserve stationarity, a wetting and drying scheme, and a local time-stepping scheme to coordinate solution updates across many links and enable coupling to a two-dimensional overland flow model. A unique variant of the Harten, Lax and van Leer (HLL) Riemann solver is also introduced, and a boundary solver is developed to accommodate the wide range of possible flow regimes and transitions. The boundary solver is explicit to facilitate the extension of TPA to large networks and coupling with an overland flow model. Promising results are obtained in a varied set of test problems involving simple sewer networks.
C1 [Sanders, Brett F.] Univ Calif Irvine, Dept Civil & Environm Engn, Irvine, CA 92697 USA.
[Bradford, Scott F.] USN, Res Lab, Image Sci & Applicat Branch, Washington, DC 20375 USA.
RP Sanders, BF (reprint author), Univ Calif Irvine, Dept Civil & Environm Engn, Irvine, CA 92697 USA.
RI Sanders, Brett/K-7153-2012
FU National Science Foundation [CMMI 0825165]
FX B.F.S. was supported by a grant from the National Science Foundation
(Grant No. CMMI 0825165), whose support is gratefully acknowledged. The
authors thank J. Vasconcelos for graciously sharing experimental and
modeling data reported in this paper, and Bernardo Trindade for
reviewing the manuscript and offering suggestions for improvements.
NR 41
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U1 1
U2 12
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 0733-9429
J9 J HYDRAUL ENG-ASCE
JI J. Hydraul. Eng.-ASCE
PD FEB
PY 2011
VL 137
IS 2
BP 158
EP 172
DI 10.1061/(ASCE)HY.1943-7900.0000293
PG 15
WC Engineering, Civil; Engineering, Mechanical; Water Resources
SC Engineering; Water Resources
GA 706LB
UT WOS:000286218800003
ER
PT J
AU Rukhin, A
Priebe, CE
AF Rukhin, Andrey
Priebe, Carey E.
TI A comparative power analysis of the maximum degree and size invariants
for random graph inference
SO JOURNAL OF STATISTICAL PLANNING AND INFERENCE
LA English
DT Article
DE Erdos-Renyi random graphs; Statistical inference; Comparative power
analysis
AB Let p,s is an element of (0,1] with s > p, let m, n is an element of N with 1 < m < n, and define V = {1, ..., n}. Let ER(n,p) denote the random graph model on V where each edge is independently included in the graph with probability p. Let kappa(n,p,m,s) denote the random graph model on V where each edge among the m vertices {1, ..., m} is independently included in the graph with probability s and all other edges are independently included with probability p. We view graphs from the ER(n,p) model as "homogeneous": the probability of the presence of an edge is the same throughout such a graph. On the other hand, we view a graph generated by the kappa model as "anomalous": such a graph possesses increased edge probability among a certain subset of its vertices.
Our inference setting is to determine whether an observed graph G is "homogeneous" (with some known p) or "anomalous". In this article, we analyze the statistical power beta of the size invariant vertical bar E(G)vertical bar (the number of edges in the graph) and the maximum degree invariant, Delta(G) in detecting such anomalies. In particular, we demonstrate an interesting phenomenon when comparing the powers of these statistics: the limit theory can be at odds with the finite-sample evidence even for astronomically large graphs. For example, under certain values of p,s and m = m(n), we show that the maximum degree statistic is more powerful (beta(Delta) > beta(vertical bar E vertical bar)) for n <= 10(24) while lim(n ->infinity)beta(Delta)/beta(vertical bar E vertical bar) < 1. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Priebe, Carey E.] Johns Hopkins Univ, Dept Appl Math & Stat, Baltimore, MD 21218 USA.
[Rukhin, Andrey] USN, Ctr Surface Warfare, Dahlgren Div, Dahlgren, VA 22448 USA.
RP Priebe, CE (reprint author), Johns Hopkins Univ, Dept Appl Math & Stat, Baltimore, MD 21218 USA.
EM cep@jhu.edu
RI Priebe, Carey E./A-3305-2010
NR 5
TC 2
Z9 2
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3758
J9 J STAT PLAN INFER
JI J. Stat. Plan. Infer.
PD FEB
PY 2011
VL 141
IS 2
BP 1041
EP 1046
DI 10.1016/j.jspi.2010.09.013
PG 6
WC Statistics & Probability
SC Mathematics
GA 682FJ
UT WOS:000284386500041
ER
PT J
AU Tanyi, JA
Nitzling, KD
Lodwick, CJ
Huston, AL
Justus, BL
AF Tanyi, James A.
Nitzling, Kevin D.
Lodwick, Camille J.
Huston, Alan L.
Justus, Brian L.
TI Characterization of a gated fiber-optic-coupled detector for application
in clinical electron beam dosimetry
SO MEDICAL PHYSICS
LA English
DT Article
DE real-time dosimetry; pulsed electron beam; gated fiber optics; in vivo
dosimetry
ID REAL-TIME; CERENKOV RADIATION; PHOTON BEAMS; RADIOTHERAPY; SENSITIVITY;
DEPENDENCE; LIGHT; OSL
AB Purpose: Assessment of the fundamental dosimetric characteristics of a novel gated fiber-optic-coupled dosimetry system for clinical electron beam irradiation.
Methods: The response of fiber-optic-coupled dosimetry system to clinical electron beam, with nominal energy range of 6-20 MeV, was evaluated for reproducibility, linearity, and output dependence on dose rate, dose per pulse, energy, and field size. The validity of the detector system's response was assessed in correspondence with a reference ionization chamber.
Results: The fiber-optic-coupled dosimetry system showed little dependence to dose rate variations (coefficient of variation +/-0.37%) and dose per pulse changes (with 0.54% of reference chamber measurements). The reproducibility of the system was +/-0.55% for dose fractions of similar to 100 cGy. Energy dependence was within +/-1.67% relative to the reference ionization chamber for the 6-20 MeV nominal electron beam energy range. The system exhibited excellent linear response (R(2) = 1.000) compared to reference ionization chamber in the dose range of 1-1000 cGy. The output factors were within +/-0.54% of the corresponding reference ionization chamber measurements.
Conclusions: The dosimetric properties of the gated fiber-optic-coupled dosimetry system compare favorably to the corresponding reference ionization chamber measurements and show considerable potential for applications in clinical electron beam radiotherapy. (C) 2011 American Association of Physicists in Medicine. [DOI: 10.1118/1.3539737]
C1 [Tanyi, James A.] Oregon Hlth & Sci Univ, Dept Radiat Med, Portland, OR 97239 USA.
[Tanyi, James A.; Nitzling, Kevin D.; Lodwick, Camille J.] Oregon State Univ, Dept Nucl Engn & Radiat Hlth Phys, Corvallis, OR 97331 USA.
[Huston, Alan L.; Justus, Brian L.] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
RP Tanyi, JA (reprint author), Oregon Hlth & Sci Univ, Dept Radiat Med, Portland, OR 97239 USA.
EM tanyij@ohsu.edu
NR 23
TC 4
Z9 4
U1 0
U2 3
PU AMER ASSOC PHYSICISTS MEDICINE AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0094-2405
J9 MED PHYS
JI Med. Phys.
PD FEB
PY 2011
VL 38
IS 2
BP 961
EP 967
DI 10.1118/1.3539737
PG 7
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 716DI
UT WOS:000286945000042
PM 21452732
ER
PT J
AU Vasudevan, AK
Moody, NR
Holroyd, NJH
Ricker, RE
AF Vasudevan, A. K.
Moody, N. R.
Holroyd, N. J. H.
Ricker, R. E.
TI Foreword: International Symposium on the Stress Corrosion Cracking in
Structural Materials at Ambient Temperatures
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Editorial Material
C1 [Vasudevan, A. K.] Off Naval Res, Arlington, VA 22217 USA.
[Moody, N. R.] Sandia Natl Labs, Livermore, CA USA.
[Holroyd, N. J. H.] Luxfer Gas Cylinders, Riverside, CA USA.
[Ricker, R. E.] Natl Inst Sci & Technol, Gaithersburg, MD USA.
RP Vasudevan, AK (reprint author), Off Naval Res, Arlington, VA 22217 USA.
RI Ricker, Richard/H-4880-2011
OI Ricker, Richard/0000-0002-2871-4908
NR 0
TC 1
Z9 1
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD FEB
PY 2011
VL 42A
IS 2
BP 249
EP 249
PG 1
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 714WO
UT WOS:000286839900001
ER
PT J
AU Heltemes, KJ
Dougherty, AL
MacGregor, AJ
Galameau, MR
AF Heltemes, Kevin J.
Dougherty, Amber L.
MacGregor, Andrew J.
Galameau, Michael R.
TI Inpatient Hospitalizations of U.S. Military Personnel Medically
Evacuated From Iraq and Afghanistan With Combat-Related Traumatic Brain
Injury
SO MILITARY MEDICINE
LA English
DT Article
ID POSTTRAUMATIC-STRESS-DISORDER; NECK INJURIES; DEPRESSION; FREEDOM; HEAD;
WAR
AB Traumatic brain injury (TBI) has been called the signature wound of Operation Iraqi Freedom (OIF) and Operation Enduring Freedom (OEF). The aim of the present study was to describe and assess the incidence of inpatient hospitalizations of U.S. military personnel who were medically evacuated from OIF and OEF with combat-related TBI. Inpatient medical records from 2003 to 2008 were used to determine incident episodes of TBI requiring hospitalization in Landstuhl or CONUS Regional Medical Centers. Denominator data for calculating incidence rates were available from the Defense Manpower Data Center. During the study period, 1,213 U.S. military personnel from OIF and OEF were hospitalized with combat-related TBI. Of these, the largest proportion (40.9%) occurred in 2007. The rate of inpatient hospitalization with TBI was 10.4 per 10,000 troop strength (95% confidence interval: 9.9, 10.9). Future research should examine the incidence of TBI in-theater and include an analysis by injury severity.
C1 [Heltemes, Kevin J.; Dougherty, Amber L.; MacGregor, Andrew J.; Galameau, Michael R.] USN, Hlth Res Ctr, San Diego, CA 92106 USA.
RP Heltemes, KJ (reprint author), USN, Hlth Res Ctr, 140 Sylvester Rd, San Diego, CA 92106 USA.
FU U.S. Navy Bureau of Medicine and Surgery, Washington, DC under Work Unit
[60808]
FX We thank Science Applications International Corporation for its
contributions to this work. This work was supported by the U.S. Navy
Bureau of Medicine and Surgery, Washington, DC, under Work Unit No.
60808.
NR 27
TC 9
Z9 9
U1 0
U2 1
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD FEB
PY 2011
VL 176
IS 2
BP 132
EP 135
PG 4
WC Medicine, General & Internal
SC General & Internal Medicine
GA 825BL
UT WOS:000295245800005
PM 21366072
ER
PT J
AU Johnson, DC
Polusny, MA
Erbes, CR
King, D
King, L
Litz, BT
Schnurr, PP
Friedman, M
Pietrzak, RH
Southwick, SM
AF Johnson, Douglas C.
Polusny, Melissa A.
Erbes, Christopher R.
King, Daniel
King, Lynda
Litz, Brett T.
Schnurr, Paula P.
Friedman, Matthew
Pietrzak, Robert H.
Southwick, Steven M.
TI Development and Initial Validation of the Response to Stressful
Experiences Scale
SO MILITARY MEDICINE
LA English
DT Article
ID DAVIDSON RESILIENCE SCALE; PSYCHOLOGICAL RESILIENCE; CONSTRUCT-VALIDITY;
JOB-SATISFACTION; SOCIAL SUPPORT; LIFE EVENTS; CD-RISC; HARDINESS;
PREDICTORS; MODEL
AB This report describes the development and initial validation of the Response to Stressful Experiences Scale (RSES), a measure of individual differences in cognitive, emotional, and behavioral responses to stressful life events. We validated this instrument with active-duty and reserve components of military and veterans samples (N = 1,014). The resulting 22-item scale demonstrated sound internal consistency (alpha = 0.91-0.93) and good test-retest reliability (r = 0.87). Factor analysis suggested 5 protective factors: (a) meaning-making and restoration, (b) active coping, (c) cognitive flexibility, (d) spirituality, and (e) self-efficacy. Associations with other measures supported convergent, discriminant, and concurrent validity. In separate military samples, the RSES accounted for unique variance in posttraumatic stress disorder symptoms above and beyond existing scales measuring resilience-related constructs, thereby demonstrating incremental validity. The RSES provides a brief, reliable, and valid measure of individual differences in cognitive, emotional, and behavioral responses to life's most stressful events.
C1 [Johnson, Douglas C.] USN, Hlth Res Ctr, San Diego, CA 92106 USA.
[Johnson, Douglas C.] Univ Calif San Diego, Sch Med, Dept Psychiat, La Jolla, CA 92037 USA.
[Polusny, Melissa A.] Minneapolis VA Med Ctr, Posttraumat Stress Recovery Program, Minneapolis, MN 55417 USA.
[Polusny, Melissa A.] Minneapolis VA Med Ctr, Ctr Chron Dis Outcome Res, Minneapolis, MN 55417 USA.
[Polusny, Melissa A.; Erbes, Christopher R.] Univ Minnesota, Sch Med, Dept Psychiat, Minneapolis, MN 55454 USA.
[King, Daniel; Litz, Brett T.] VA Boston Healthcare Syst 116B2, Natl Ctr Posttraumat Stress Disorder, Behav Sci Div, Boston, MA 02130 USA.
[King, Daniel; King, Lynda; Litz, Brett T.] Boston Univ, Sch Med, Dept Psychiat, Boston, MA 02118 USA.
[King, Lynda] VA Boston Healthcare Syst 116B3, Natl Ctr Posttraumat Stress Disorder, Womens Hlth Sci Div, Boston, MA 02130 USA.
[Schnurr, Paula P.; Friedman, Matthew] VA Med Ctr, Natl Ctr Posttraumat Stress Disorder, Execut Div, White River Jct, VT 05009 USA.
[Schnurr, Paula P.; Friedman, Matthew] Dartmouth Med Sch, Dept Psychiat, Hanover, NH 03755 USA.
[Friedman, Matthew] Dartmouth Med Sch, Dept Pharmacol, Hanover, NH 03755 USA.
[Pietrzak, Robert H.; Southwick, Steven M.] Vet Adm Med Ctr, Natl Ctr Posttratimat Stress Disorder, Clin Neurosci Div, West Haven, CT 06516 USA.
[Pietrzak, Robert H.; Southwick, Steven M.] Yale Univ, Sch Med, Dept Psychiat, New Haven, CT 06511 USA.
RP Johnson, DC (reprint author), USN, Hlth Res Ctr, 140 Sylvester Rd,Bldg 328, San Diego, CA 92106 USA.
FU Department of Defense [W81XWH-07-2-003]
FX This material is the result of work supported with resources and the use
of facilities at the Minneapolis VA Medical Center, Minneapolis, MN; VA
Connecticut Healthcare System, West Haven, CT; and VA Boston Healthcare
System, Boston, MA. This research was supported in part by a grant from
the Department of Defense Congressionally Directed Medical Research
Program (CDMRP; W81XWH-07-2-003).
NR 35
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U1 3
U2 8
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD FEB
PY 2011
VL 176
IS 2
BP 161
EP 169
PG 9
WC Medicine, General & Internal
SC General & Internal Medicine
GA 825BL
UT WOS:000295245800011
PM 21366078
ER
PT J
AU Mastro, MA
Mazeina, L
Kim, BJ
Prokes, SM
Hite, J
Eddy, CR
Kim, J
AF Mastro, Michael A.
Mazeina, Lena
Kim, Byung-Jae
Prokes, Sharka M.
Hite, Jennifer
Eddy, Charles R., Jr.
Kim, Jihyun
TI Vertical zinc oxide nanowires embedded in self-assembled photonic
crystal
SO PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
LA English
DT Article
DE Zinc Oxide; Nanowire; Photonic crystal
AB A dense array of vertical ZnO nanowires was grown on an Al0.3Ga0.7N/AlN distributed Bragg reflector. The ZnO nanowires were embedded in a photonic crystal formed by self-assembly of SiO2 nanospheres into a close-packed fcc structure. The photonic crystal modified the spontaneous emission spectrum of the ZnO nanowires. A calculation confirmed that a close spacing in the ZnO nanowires will lead to coupling in the wire-to-wire electromagnetic fields. Published by Elsevier B.V.
C1 [Mastro, Michael A.; Mazeina, Lena; Prokes, Sharka M.; Hite, Jennifer; Eddy, Charles R., Jr.] USN, Res Lab, Washington, DC 20375 USA.
[Kim, Byung-Jae; Kim, Jihyun] Korea Univ, Dept Chem & Biol Engn, Seoul 136701, South Korea.
RP Mastro, MA (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM michael.mastro@nrl.navy.mil; hyunhyun7@korea.ac.kr
RI Kim, Jihyun/F-6940-2013; Hite, Jennifer/L-5637-2015
OI Hite, Jennifer/0000-0002-4090-0826
FU ONR-Global [N62909-09-1-4060]
FX The work at NRL was supported by ONR and ONR-Global (N62909-09-1-4060).
LM thanks National Research Council for administrative support.
NR 11
TC 4
Z9 5
U1 2
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1569-4410
EI 1569-4429
J9 PHOTONIC NANOSTRUCT
JI Photonics Nanostruct.
PD FEB
PY 2011
VL 9
IS 1
BP 91
EP 94
DI 10.1016/j.photonics.2010.12.001
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Optics; Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Optics; Physics
GA 743JX
UT WOS:000289015700013
ER
PT J
AU Henderson, DR
AF Henderson, David R.
TI At Home: A Short History of Private Life
SO POLICY REVIEW
LA English
DT Book Review
C1 [Henderson, David R.] Hoover Inst War Revolut & Peace, Stanford, CA 94305 USA.
[Henderson, David R.] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Monterey, CA 93943 USA.
RP Henderson, DR (reprint author), Hoover Inst War Revolut & Peace, Stanford, CA 94305 USA.
NR 1
TC 0
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U1 1
U2 1
PU HOOVER INST
PI STANFORD
PA STANFORD UNIV, STANFORD, CA 94305-601 USA
SN 0146-5945
J9 POLICY REV
JI Policy Rev.
PD FEB-MAR
PY 2011
IS 165
BP 108
EP 112
PG 5
WC Political Science
SC Government & Law
GA 722HB
UT WOS:000287422100011
ER
PT J
AU Delzer, JA
Romanyukha, A
Benevides, LA
AF Delzer, J. A.
Romanyukha, A.
Benevides, L. A.
TI Long-term neutron dose fading study of LiF: Mg,Cu,P TLD
SO RADIATION MEASUREMENTS
LA English
DT Article
DE TLD; Dosimetry; Neutron; Dose fading; TLD-600H; TLD-700H
ID RESIDUAL SIGNAL; PERSONNEL DOSIMETRY; LIF-MG,CU,P; LIMIT
AB An extensive study of neutron dose fading in LiF:Mg,Cu,P thermoluminescent dosimeters (TLD) using commercially-available dosimeters and equipment for their processing was undertaken. During the 52 week study, three thousand TLDs were stored for various lengths of time before and after being exposed to a plutonium beryllium radiation source. The TLDs were subsequently processed and the resulting doses were compared to the reference exposure. Both a loss of signal and a loss of sensitivity were evaluated. The results of this study have shown that the commercially produced LiF:Mg,Cu,P TLD has no statistically significant change in sensitivity or change in signal with up to 52 weeks of pre-irradiation or post-irradiation time. The results of this study will provide the technical basis for increasing the exposure record accuracy, and extending the usable lifetime of dosimeters. Published by Elsevier Ltd.
C1 [Romanyukha, A.; Benevides, L. A.] USN, Dosimerty Ctr, Bethesda, MD 20889 USA.
[Delzer, J. A.] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
RP Romanyukha, A (reprint author), USN, Dosimerty Ctr, 8901 Wisconsin Ave, Bethesda, MD 20889 USA.
EM aromanyukha@usuhs.mil
FU U.S. Department of Defense operational and maintenance budget
FX The study was funded through U.S. Department of Defense operational and
maintenance budget.
NR 17
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U1 0
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1350-4487
J9 RADIAT MEAS
JI Radiat. Meas.
PD FEB
PY 2011
VL 46
IS 2
BP 199
EP 204
DI 10.1016/j.radmeas.2010.11.012
PG 6
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 725DS
UT WOS:000287626000006
ER
PT J
AU O'Connor, P
O'Dea, A
Kennedy, Q
Buttrey, SE
AF O'Connor, Paul
O'Dea, Angela
Kennedy, Quinn
Buttrey, Samuel E.
TI Measuring safety climate in aviation: A review and recommendations for
the future
SO SAFETY SCIENCE
LA English
DT Review
DE Safety climate; Aviation; Validity
ID HIGH-RELIABILITY ORGANIZATIONS; INITIAL VALIDATION; CULTURE; PROGRAMS
AB This paper reviews 23 studies that have examined safety climate within commercial and military aviation. The safety climate factors identified in the aviation safety climate questionnaires were found to be consistent with the literature examining safety climate in non-aviation high reliability organizations. Therefore, it was concluded that the aviation safety climate tools had some construct validity (the extent to which the questionnaire measures what it is intended to measure). However, the majority of the studies made no attempt to establish the discriminate validity (the ability of the tool to differentiate between organizations or personnel with different levels of safety performance) of the tools. It is recommended that rather than constructing more aviation safety climate questionnaires, researchers should focus on establishing the construct and discriminate validity of existing measures by correlating safety climate with other metrics of safety performance. It is recognized that the accident rate in commercial aviation is too low to provide a sufficiently sensitive measure of safety performance. However, there are other measures of safety performance, collected as part of a company's Aviation Safety Action Program or Flight Operational Quality Assurance, which could be used to assess the discriminate validity of an aviation safety climate tool. (c) 2010 Elsevier Ltd. All rights reserved.
C1 [O'Connor, Paul] Natl Univ Ireland, JE Cairnes Sch Business & Econ, Ctr Innovat & Struct Change, Galway, Ireland.
[O'Dea, Angela] USN, Postgrad Sch, Res Dept, Monterey, CA 93943 USA.
[Kennedy, Quinn; Buttrey, Samuel E.] USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
RP O'Connor, P (reprint author), Natl Univ Ireland, JE Cairnes Sch Business & Econ, Ctr Innovat & Struct Change, Galway, Ireland.
EM poc73@hotmail.com; aodea69@hotmail.com; mqkenned@nps.edu;
buttrey@nps.edu
RI OConnor, Paul/H-1221-2011
OI OConnor, Paul/0000-0001-9036-098X
FU Defense Safety Oversight Council (DSOC)
FX This work was funded by the Defense Safety Oversight Council (DSOC). All
opinions stated in this paper are those of the authors and do not
necessarily represent the opinion or position of the US Navy, the Naval
Postgraduate School, or the National University of Ireland, Galway.
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U1 4
U2 22
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0925-7535
J9 SAFETY SCI
JI Saf. Sci.
PD FEB
PY 2011
VL 49
IS 2
BP 128
EP 138
DI 10.1016/j.ssci.2010.10.001
PG 11
WC Engineering, Industrial; Operations Research & Management Science
SC Engineering; Operations Research & Management Science
GA 692BF
UT WOS:000285125800004
ER
PT J
AU Fletcher, M
Alexson, DM
Prokes, S
Glembocki, O
Vivoni, A
Hosten, C
AF Fletcher, Melissa
Alexson, D. M.
Prokes, Sharka
Glembocki, Orest
Vivoni, Alberto
Hosten, Charles
TI Surface-enhanced Raman scattering of a Ag/oligo(phenyleneethynylene)/Ag
sandwich
SO SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
LA English
DT Article
DE Surface-enhanced Raman; Oligo(phenyleneethynylenes); Nanosandwich
ID SELF-ASSEMBLED MONOLAYERS; CHARGE-TRANSFER MECHANISM; SILVER
NANOPARTICLES; MOLECULAR ELECTRONICS; SPECTROSCOPY; GOLD; SERS;
STABILITY; FILMS; ARRAYS
AB alpha,omega-Dithiols are a useful class of compounds in molecular electronics because of their ability to easily adsorb to two metal surfaces, producing a molecular junction. We have prepared Ag nanosphere/oligo(phenyleneethynylene)/Ag sol (AgNS/OPE/Ag sol) and Ag nanowire/oligo(phenyleneethynylene)/Ag sol (AgNW/OPE/Ag sol) sandwiches to simulate the architecture of a molecular electronic device. This was achieved by self-assembly of OPE on the silver nanosurface, deprotection of the terminal sulfur, and deposition of Ag sol atop the monolayer. These sandwiches were then characterized by surface-enhanced Raman scattering (SERS) spectroscopy. The resulting spectra were compared to the bulk spectrum of the dimer and to the Ag nanosurface/OPE SERS spectra. The intensities of the SERS spectra in both systems exhibit a strong dependence on Ag deposition time and the results are also suggestive of intense interparticle coupling of the electromagnetic fields in both the AgNW/OPE/Ag and the AgNS/OPE/Ag systems. Three previously unobserved bands (1219, 1234, 2037 cm(-1)) arose in the SER spectra of the sandwiches and their presence is attributed to the strong enhancement of the electromagnetic field which is predicted from the COSMOL computational package. The 544cm(-1) disulfide bond which is observed in the spectrum of solid OPE but is absent in the AgNS/OPE/Ag and AgNW/OPE/Ag spectra is indicative of chemisorption of OPE to the nanoparticles through oxidative dissociation of the disulfide bond. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Fletcher, Melissa; Hosten, Charles] Howard Univ, Dept Chem, Washington, DC 20059 USA.
[Alexson, D. M.; Prokes, Sharka; Glembocki, Orest] USN, Res Lab, Washington, DC 20375 USA.
[Vivoni, Alberto] Inter Amer Univ, Dept Biol Chem & Environm Sci, Bayamon, PR USA.
RP Hosten, C (reprint author), Howard Univ, Dept Chem, Washington, DC 20059 USA.
EM chosten@howard.edu
FU CREST Nanoscale Analytical Sciences Education and Research Center [NSF
0833127]; NSF AGEP/Bridge; Department of Chemistry at Howard University
FX The authors would like to thank the CREST Nanoscale Analytical Sciences
Education and Research Center Grant Number NSF 0833127. M.F. would like
to thank the NSF AGEP/Bridge to the Doctorate Program and the Department
of Chemistry at Howard University for financial support. C.M.H. would
like to acknowledge the ASEE/Summer Faculty Research Program at the
Naval Research Laboratory.
NR 44
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U1 0
U2 17
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1386-1425
J9 SPECTROCHIM ACTA A
JI Spectroc. Acta Pt. A-Molec. Biomolec. Spectr.
PD FEB
PY 2011
VL 78
IS 2
BP 706
EP 711
DI 10.1016/j.saa.2010.11.053
PG 6
WC Spectroscopy
SC Spectroscopy
GA 724ZH
UT WOS:000287614500023
PM 21190893
ER
PT J
AU Flores, C
Bounds, DL
Ruby, DE
AF Flores, Conception
Bounds, Dixie L.
Ruby, Douglas E.
TI Does Prescribed Fire Benefit Wetland Vegetation?
SO WETLANDS
LA English
DT Article
DE Biomass; Distichlis spicata; Marsh; Schoenoplectus americanus; Spartina
alterniflora; Spartina patens; Stem density
ID PLANT COMMUNITY; BIOMASS; MARSH; MANAGEMENT; HERBIVORY; TEXAS
AB The effects of fire on wetland vegetation in the mid-Atlantic region of the United States are poorly known, despite the historical use of fire by federal, state, and private landowners in the Chesapeake Bay Region. Prescribed fire is widely used by land managers to promote vegetation that is beneficial to migratory waterfowl, muskrats, and other native wildlife and to reduce competition from less desirable plant species. We compared vegetative response to two fire rotations, annual burns and 3-year burns, and two control sites, Control 1 and Control 2. We tested the effects of fire within six tidal marsh wetlands at Blackwater National Wildlife Refuge and Fishing Bay Wildlife Management Area in Maryland. We examined changes in total live biomass (all species), total stem density, litter, and changes in live biomass and stem density of four dominant wetland plant species (11 variables). Our results suggest that annual prescribed fires will decrease the accumulation of litter, increase the biomass and stem densities of some wetland plants generally considered less desirable for wildlife, and have little or no effect on other wetland plants previously thought to benefit from fire.
C1 [Flores, Conception; Bounds, Dixie L.] Univ Maryland Eastern Shore, US Geol Survey, Biol Resources Div, Maryland Cooperat Fish & Wildlife Res Unit, Princess Anne, MD 21853 USA.
[Ruby, Douglas E.] Univ Maryland Eastern Shore, Dept Nat Sci, Princess Anne, MD 21853 USA.
RP Flores, C (reprint author), USN, Facil Engn Command SW, 1220 Pacific Highway, San Diego, CA 92132 USA.
EM conception.flores@navy.mil; dixie_birch@fws.gov; deruby@umes.edu
FU U. S. Fish and Wildlife Service
FX We thank the U. S. Fish and Wildlife Service for funding the project. We
are grateful to Bjorn Burgeson, Katherine Thorington, Fred Adams, and
Alice Brown for assistance in biomass collection. Thanks to the
Blackwater NWR staff, especially, Glenn Carowan, Bill Giese, Keith
Morris, Roger Stone, and the Blackwater Fire Crew. Statistical
assistance and support was provided by Jeff S. Hatfield, USGS Patuxent
Wildlife Research Center; Dr. Mary Christman, University of Maryland
College Park; Dr. Patricia Jones, University of Arizona; Dr. David
Turner, USFS Rocky Mountain Research Station; and Dawn Lawson and Toni
Mizerek, Naval Facilities Engineering Command Southwest. The findings
and conclusions in this article are those of the author(s) and do not
necessarily represent the views of the U.S. Fish and Wildlife Service.
NR 46
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U1 1
U2 25
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0277-5212
EI 1943-6246
J9 WETLANDS
JI Wetlands
PD FEB
PY 2011
VL 31
IS 1
BP 35
EP 44
DI 10.1007/s13157-010-0131-x
PG 10
WC Ecology; Environmental Sciences
SC Environmental Sciences & Ecology
GA 741ZO
UT WOS:000288907700004
ER
PT J
AU Bargmann, S
Jordan, PM
AF Bargmann, S.
Jordan, P. M.
TI A second-sound based, hyperbolic SIR model for high-diffusivity spread
SO PHYSICS LETTERS A
LA English
DT Article
DE SIR models; Inertial-type II theory of second-sound; Traveling wave
solutions; Singular surfaces; Lambert W-function
ID NONLINEAR MEDIA; TRAVELING-WAVES; GROWTH; SHOCK; THERMODYNAMICS;
PROPAGATION; DYNAMICS
AB We present an analytical study of one-dimensional (1D) kinematic wave phenomena under a hyperbolic SIR model based not on Fick's diffusion law, but rather on the inertial-type II flux law of second-sound theory. Unlike in the Ficken context, we are able to derive exact traveling wave solutions (TWS)s, as well as explicit asymptotic/approximate expressions, for both the susceptibles and infectives. We also determine, using singular surface theory, how shock-fronts resulting from initial jump discontinuities propagate and evolve under this model. In particular, critical values and special cases are examined and possible mitigation methods, which take the form of parameter-value manipulation(s), are noted. (C) 2011 Elsevier B.V. All rights reserved.
C1 [Bargmann, S.] TU Dortmund, Inst Mech, D-44227 Dortmund, Germany.
[Jordan, P. M.] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Jordan, PM (reprint author), TU Dortmund, Inst Mech, Leonhard Euler Str 5, D-44227 Dortmund, Germany.
EM pjordan@nrlssc.navy.mil
FU German Science Foundation (DFG); ONR/NRL
FX The authors are grateful to Prof. F. Porcelli and the two anonymous
referees for their helpful comments and suggestions. Partial financial
support for this work provided by the German Science Foundation (DFG) is
greatly acknowledged (S.B.). P.M.J. was supported by ONR/NRL funding.
NR 26
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U1 1
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9601
J9 PHYS LETT A
JI Phys. Lett. A
PD JAN 31
PY 2011
VL 375
IS 5
BP 898
EP 907
DI 10.1016/j.physleta.2010.12.059
PG 10
WC Physics, Multidisciplinary
SC Physics
GA 716II
UT WOS:000286961900007
ER
PT J
AU Xia, L
Boos, JB
Bennett, BR
Ancona, MG
del Alamo, JA
AF Xia, Ling
Boos, J. Brad
Bennett, Brian R.
Ancona, Mario G.
del Alamo, Jesus A.
TI Hole mobility enhancement in In0.41Ga0.59Sb quantum-well field-effect
transistors
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID CHANNEL; SEMICONDUCTORS; REPRESENTATION; SILICON; STRAIN
AB The impact of < 110 > uniaxial strain on the characteristics of p-channel In0.41Ga0.59Sb quantum-well field-effect transistors (QW-FETs) is studied through chip-bending experiments. Uniaxial strain is found to affect the linear-regime drain current and the threshold voltage of the FET through the modulation of the hole mobility of the two-dimensional hole gas (2DHG) in the QW-FET. The piezoresistance coefficients of the 2DHG have been determined to be pi(parallel to)(< 110 >) = 1.17 x 10(-10) cm(2)/dyn and pi(perpendicular to)(< 110 >) =-1.9 x 10(-11) cm(2)/dyn. The value of pi(parallel to)(< 110 >) is 1.5 times that of holes in Si metal-oxide-semiconductor (MOS) field-effect transistors and establishes InGaSb as a promising material system for a future III-V complementary MOS (CMOS) technology. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3552963]
C1 [Xia, Ling; del Alamo, Jesus A.] MIT, Microsyst Technol Labs, Cambridge, MA 02139 USA.
[Boos, J. Brad; Bennett, Brian R.; Ancona, Mario G.] USN, Res Lab, Washington, DC 20375 USA.
RP Xia, L (reprint author), MIT, Microsyst Technol Labs, Cambridge, MA 02139 USA.
EM lingxia@mit.edu
RI Bennett, Brian/A-8850-2008; Xia, Ling/G-5573-2012;
OI Bennett, Brian/0000-0002-2437-4213; del Alamo, Jesus/0000-0003-4003-7863
FU FCRP-MSD; Intel Corp.; Office of Naval Research
FX The MIT portion of this work was sponsored by FCRP-MSD and Intel Corp.
The NRL authors thank the Office of Naval Research for support.
NR 20
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Z9 17
U1 1
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 31
PY 2011
VL 98
IS 5
AR 053505
DI 10.1063/1.3552963
PG 3
WC Physics, Applied
SC Physics
GA 716QK
UT WOS:000286988400080
ER
PT J
AU Smith, TC
Jacobson, IG
Hooper, TI
LeardMann, CA
Boyko, EJ
Smith, B
Gackstetter, GD
Wells, TS
Amoroso, PJ
Gray, GC
Riddle, JR
Ryan, MAK
AF Smith, Tyler C.
Jacobson, Isabel G.
Hooper, Tomoko I.
LeardMann, Cynthia A.
Boyko, Edward J.
Smith, Besa
Gackstetter, Gary D.
Wells, Timothy S.
Amoroso, Paul J.
Gray, Gregory C.
Riddle, James R.
Ryan, Margaret A. K.
CA Millennium Cohort Study Team
TI Health impact of US military service in a large population-based
military cohort: findings of the Millennium Cohort Study, 2001-2008
SO BMC PUBLIC HEALTH
LA English
DT Article
ID GULF-WAR VETERANS; POSTTRAUMATIC-STRESS-DISORDER; SELF-REPORTED
SYMPTOMS; MENTAL-HEALTH; SMALLPOX VACCINATION; COMBAT DEPLOYMENT;
LONGITUDINAL ASSESSMENT; CIGARETTE-SMOKING; VIETNAM VETERANS; ERA
VETERANS
AB Background: Combat-intense, lengthy, and multiple deployments in Iraq and Afghanistan have characterized the new millennium. The US military's all-volunteer force has never been better trained and technologically equipped to engage enemy combatants in multiple theaters of operations. Nonetheless, concerns over potential lasting effects of deployment on long-term health continue to mount and are yet to be elucidated. This report outlines how findings from the first 7 years of the Millennium Cohort Study have helped to address health concerns related to military service including deployments.
Methods: The Millennium Cohort Study was designed in the late 1990s to address veteran and public concerns for the first time using prospectively collected health and behavioral data.
Results: Over 150 000 active-duty, reserve, and National Guard personnel from all service branches have enrolled, and more than 70% of the first 2 enrollment panels submitted at least 1 follow-up survey. Approximately half of the Cohort has deployed in support of operations in Iraq and Afghanistan.
Conclusion: The Millennium Cohort Study is providing prospective data that will guide public health policymakers for years to come by exploring associations between military exposures and important health outcomes. Strategic studies aim to identify, reduce, and prevent adverse health outcomes that may be associated with military service, including those related to deployment.
C1 [Smith, Tyler C.; Jacobson, Isabel G.; LeardMann, Cynthia A.; Smith, Besa] USN, Hlth Res Ctr, Ctr Deployment Hlth Res, Dept Def, San Diego, CA 92106 USA.
[Hooper, Tomoko I.] Uniformed Serv Univ Hlth Sci, Dept Prevent Med & Biometr, Bethesda, MD 20814 USA.
[Boyko, Edward J.] Seattle Epidemiol Res & Informat Ctr, Dept Vet Affairs Puget Sound Healthcare Syst, Seattle, WA USA.
[Gackstetter, Gary D.] Analyt Serv Inc ANSER, Arlington, VA USA.
[Wells, Timothy S.; Riddle, James R.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Amoroso, Paul J.] Madigan Army Med Ctr, Tacoma, WA 98431 USA.
[Gray, Gregory C.] Univ Florida, Coll Publ Hlth & Hlth Profess, Dept Environm & Global Hlth, Gainesville, FL USA.
[Ryan, Margaret A. K.] Naval Hosp Camp Pendleton, Camp Pendleton, CA USA.
RP Smith, TC (reprint author), USN, Hlth Res Ctr, Ctr Deployment Hlth Res, Dept Def, 140 Sylvester Rd, San Diego, CA 92106 USA.
EM tyler.c.smith@med.navy.mil
FU Department of Defense [60002]; M. Jackson Foundation for the Advancement
of Military Medicine, Rockville, Maryland; VA Puget Sound
FX This work represents report 09-14, supported by the Department of
Defense, under work unit no. 60002. The views expressed in this article
are those of the authors and do not reflect the official policy or
position of the Department of the Navy, Department of the Army,
Department of the Air Force, Department of Defense, Department of
Veterans Affairs, nor the US Government.; We are indebted to all
Millennium Cohort Study participants. We thank Scott L. Seggermanfrom
the Management Information Division, Defense Manpower Data Center,
Monterey, California. Additionally, we thank Millennium Cohort Team
Members Melissa Bagnell, MPH; Gina Creaven, MBA; James Davies; Lacy
Farnell; Nisara Granado, MPH, PhD; Gia Gumbs, MPH; Jaime Horton; Sydney
Lee, MS; Travis Leleu; Gordon Lynch; Jamie McGrew; Hope McMaster, MA,
PhD; Amanda Pietrucha, MPH; Teresa Powell, MS; Amber Seelig, MPH;
Katherine Snell; Steven Speigle; Kari Sausedo, MA; Martin White, MPH;
James Whitmer; and Charlene Wong, MPH; from the Department of Deployment
Health Research and Michelle LeWark, from the Naval Health Research
Center, San Diego, California. We also thank the professionals from the
US Army Medical Research and Materiel Command, especially those from the
Military Operational Medicine Research Program, Fort Detrick, Maryland.
We appreciate the support of the Henry M. Jackson Foundation for the
Advancement of Military Medicine, Rockville, Maryland. VA Puget Sound
provided support for Dr. Boyko's participation in this research.
NR 75
TC 16
Z9 16
U1 4
U2 9
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1471-2458
J9 BMC PUBLIC HEALTH
JI BMC Public Health
PD JAN 31
PY 2011
VL 11
AR 69
DI 10.1186/1471-2458-11-69
PG 10
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 723LM
UT WOS:000287508000002
PM 21281496
ER
PT J
AU Chavko, M
Watanabe, T
Adeeb, S
Lankasky, J
Ahlers, ST
McCarron, RM
AF Chavko, Mikulas
Watanabe, Tomas
Adeeb, Saleena
Lankasky, Jason
Ahlers, Stephen T.
McCarron, Richard M.
TI Relationship between orientation to a blast and pressure wave
propagation inside the rat brain
SO JOURNAL OF NEUROSCIENCE METHODS
LA English
DT Article
DE Explosion; Blast overpressure; Transmission; Rat brain
ID INDUCED NEUROTRAUMA; INJURY; SYSTEM; IRAQ
AB Exposure to a blast wave generated during an explosion may result in brain damage and related neurological impairments. Several mechanisms by which the primary blast wave can damage the brain have been proposed, including: (1) a direct effect of the shock wave on the brain causing tissue damage by skull flexure and propagation of stress and shear forces; and (2) an indirect transfer of kinetic energy from the blast, through large blood vessels and cerebrospinal fluid (CSF), to the central nervous system. To address a basic question related to the mechanisms of blast brain injury, pressure was measured inside the brains of rats exposed to a low level of blast (similar to 35 kPa), while positioned in three different orientations with respect to the primary blast wave; head facing blast, right side exposed to blast and head facing away from blast. Data show different patterns and durations of the pressure traces inside the brain, depending on the rat orientation to blast. Frontal exposures (head facing blast) resulted in pressure traces of higher amplitude and longer duration, suggesting direct transmission and reflection of the pressure inside the brain (dynamic pressure transfer). The pattern of the pressure wave inside the brain in the head facing away from blast exposures assumes contribution of the static pressure, similar to hydrodynamic pressure to the pressure wave inside the brain. Published by Elsevier B.V.
C1 [Chavko, Mikulas; Watanabe, Tomas; Adeeb, Saleena; Lankasky, Jason; Ahlers, Stephen T.; McCarron, Richard M.] USN, NeuroTrauma Dept, Med Res Ctr, Silver Spring, MD 20910 USA.
RP Chavko, M (reprint author), USN, NeuroTrauma Dept, Med Res Ctr, 503 Robert Grant Ave, Silver Spring, MD 20910 USA.
EM Mikulas.Chayko@med.navy.mil
FU CDMRP Work Unit [2780.00000.22.A0810]
FX This work was supported by CDMRP Work Unit #2780.00000.22.A0810. The
experiments reported herein were conducted according to the principles
set forth in the "Guide for the Care and Use of Laboratory Animals",
Institute of Laboratory Animal Resources, National Research Council,
National Academy Press, 1996 and was approved by WRAIR/NMRC IACUC
Committee. The opinions expressed in this presentation are those of the
authors and do not reflect the official policy of the Department of
Navy, Department of Defense, of the U.S. Government.
NR 26
TC 52
Z9 53
U1 1
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0165-0270
J9 J NEUROSCI METH
JI J. Neurosci. Methods
PD JAN 30
PY 2011
VL 195
IS 1
BP 61
EP 66
DI 10.1016/j.jneumeth.2010.11.019
PG 6
WC Biochemical Research Methods; Neurosciences
SC Biochemistry & Molecular Biology; Neurosciences & Neurology
GA 717UR
UT WOS:000287073400008
PM 21129403
ER
PT J
AU Dunlap, BI
Schweigert, IV
AF Dunlap, Brett I.
Schweigert, Igor V.
TI Self-consistent, constrained linear-combination-of-atomic-potentials
approach to quantum mechanics
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; ELECTRONIC-STRUCTURE CALCULATIONS; AUXILIARY
BASIS-SETS; HARTREE-FOCK; PERTURBATION-THEORY; ENERGY DERIVATIVES;
OPTICAL-PROPERTIES; X-ALPHA; APPROXIMATIONS; SYSTEMS
AB Variational fitting gives a stationary linear-combination of atomic potentials (LCAP) approximation to the Kohn-Sham (KS) potential, V. That potential is central to density-functional theory because it generates all orbitals, occupied as well as virtual. Perturbation theory links two self-consistent field (SCF) calculations that differ by the perturbation. Using the same variational LCAP methods and basis sets in the two SCF calculations gives precise KS potentials for each order. Variational V perturbation theory, developed herein through second order, gives stationary potentials at each order and stationary even-order perturbed energies that precisely link the two SCF calculations. Iterative methods are unnecessary because the dimension of the matrix that must be inverted is the KS basis size, not the number of occupied times virtual orbitals of coupled-perturbed methods. With variational perturbation theory, the precision of derivatives and the fidelity of the LCAP KS potential are not related. Finite differences of SCF calculations allow the precision of analytic derivatives from double-precision code to be verified to roughly seven significant digits. For a simple functional, the fourth derivatives of the energy and the first and second derivative of the KS potentials with respect to orbital occupation are computed for a standard set of molecules and basis sets, with and without constraints on the fit to the KS potential. There is no significant difference between the constrained and unconstrained calculations. (C) 2011 American Institute of Physics. [doi:10.1063/1.3524340]
C1 [Dunlap, Brett I.; Schweigert, Igor V.] USN, Res Lab, Theoret Chem Sect, Washington, DC 20375 USA.
RP Dunlap, BI (reprint author), USN, Res Lab, Theoret Chem Sect, Code 6189, Washington, DC 20375 USA.
EM dunlap@nrl.navy.mil
RI Schweigert, Igor/B-5750-2008;
OI Dunlap, Brett/0000-0003-1356-6559
FU Office of Naval Research; Naval Research Laboratory; Naval Research
Laboratory through the National Research Council of the National Academy
of Sciences
FX This work was supported and by the Office of Naval Research, both
directly and through the Naval Research Laboratory, and by the Naval
Research Laboratory through the National Research Council of the
National Academy of Sciences.
NR 69
TC 6
Z9 6
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JAN 28
PY 2011
VL 134
IS 4
AR 044122
DI 10.1063/1.3524340
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 715PY
UT WOS:000286897600027
PM 21280702
ER
PT J
AU Fragiadakis, D
Roland, CM
AF Fragiadakis, D.
Roland, C. M.
TI On the density scaling of liquid dynamics
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID MOLECULAR-DYNAMICS; HIGH-PRESSURE; CHAIN-LENGTH; RELAXATION; SIMULATION;
VISCOSITY; POLYMERS; MODELS; FLUID
AB Superpositioning of relaxation data as a function of the product variable TV(gamma), where T is temperature, V the specific volume, and gamma a material constant, is an experimental fact demonstrated for approximately 100 liquids and polymers. Such scaling behavior would result from the intermolecular potential having the form of an inverse power law (IPL), suggesting that an IPL is a good approximation for certain relaxation properties over the relevant range of intermolecular distances. However, the derivation of the scaling property of an IPL liquid is based on reduced quantities, for example, the reduced relaxation time equal to T(1/2V-1/3) times the actual relaxation time. The difference between scaling using reduced rather than unreduced units is negligible in the supercooled regime; however, at higher temperature the difference can be substantial, accounting for the purported breakdown of the scaling and giving rise to different values of the scaling exponent. Only the gamma obtained using reduced quantities can be sensibly related to the intermolecular potential. (C) 2011 American Institute of Physics. [doi:10.1063/1.3532545]
C1 [Fragiadakis, D.; Roland, C. M.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
RP Fragiadakis, D (reprint author), USN, Res Lab, Div Chem, Code 6120, Washington, DC 20375 USA.
EM roland@nrl.navy.mil
RI Fragiadakis, Daniel/A-4510-2009
FU Office of Naval Research; National Research Council
FX This work was supported by the Office of Naval Research. D.F.
acknowledges a National Research Council postdoctoral fellowship.
NR 26
TC 43
Z9 43
U1 1
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JAN 28
PY 2011
VL 134
IS 4
AR 044504
DI 10.1063/1.3532545
PG 3
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 715PY
UT WOS:000286897600070
PM 21280745
ER
PT J
AU Nedoluha, GE
Connor, BJ
Barrett, J
Mooney, T
Parrish, A
Boyd, I
Wrotny, JE
Gomez, RM
Koda, J
Santee, ML
Froidevaux, L
AF Nedoluha, Gerald E.
Connor, Brian J.
Barrett, James
Mooney, Thomas
Parrish, Alan
Boyd, Ian
Wrotny, Jonathan E.
Gomez, R. Michael
Koda, Jin
Santee, Michelle L.
Froidevaux, Lucien
TI Ground-based measurements of ClO from Mauna Kea and intercomparisons
with Aura and UARS MLS
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID CHLORINE MONOXIDE; STRATOSPHERE; VALIDATION; CHEMISTRY; OZONE;
ANTARCTICA; MESOSPHERE; SATELLITE; HALOE; MODEL
AB The ground-based measurements of upper stratospheric ClO, made with a ground-based millimeter wave instrument at Mauna Kea, Hawaii (19.8 degrees N, 204.5 degrees E) starting in 1992, are compared with UARS (Upper Atmosphere Research Satellite) MLS ClO measurements (1991-1998) and the Aura MLS ClO measurements (2004-2009). The ground-based measurements are made as part of the Network for the Detection of Atmospheric Composition Change (NDACC). Intercomparisons between the ground-based measurements and the Aura MLS measurements show that both instruments retrieve similar seasonal variations over Mauna Kea. The seasonal variation in ClO is also compared with measurements of variations in stratospheric CH4, which affects the partitioning of total inorganic chlorine. Using the ground-based instruments as a transfer standard, we find that the agreement between UARS and Aura MLS ClO measurements near the peak of the mixing ratio profile is within similar to 1%. Combining the uncertainties in the biases calculated from the coincident ground-based and satellite measurements, we find that using the ground-based data as a transfer standard allows us to provide a 2 sigma limit to the bias between the UARS and Aura measurements of 3%-4% near the peak of the ClO profile. Given agreement between UARS and Aura MLS of similar to 1%+/- 4%, there is no reason to apply any bias correction in order to use the UARS and Aura MLS ClO measurements as a single data set.
C1 [Nedoluha, Gerald E.; Gomez, R. Michael] USN, Res Lab, Washington, DC 20375 USA.
[Connor, Brian J.] BC Consulting, Alexandra, New Zealand.
[Barrett, James; Mooney, Thomas; Koda, Jin] SUNY Stony Brook, Stony Brook, NY 11794 USA.
[Parrish, Alan] Univ Massachusetts, Amherst, MA 01003 USA.
[Santee, Michelle L.; Froidevaux, Lucien] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Boyd, Ian] Natl Inst Water & Atmospher Res, Auckland 1149, New Zealand.
[Wrotny, Jonathan E.] Atmospher & Environm Res Inc, Lexington, MA 02421 USA.
RP Nedoluha, GE (reprint author), USN, Res Lab, 4555 Overlook Ave, Washington, DC 20375 USA.
EM nedoluha@nrl.navy.mil
FU National Aeronautics and Space Administration; NASA [NNX09AF40G]
FX We are deeply indebted to Prof. Philip Solomon of Stony Brook
University, who was one of the first to envision that stratospheric ClO
could be monitored by ground-based remote measurements. Subsequently, he
led this program from its inception in the 1980s until his death in
April 2008. Work at the Jet Propulsion Laboratory, California Institute
of Technology, was done under contract with the National Aeronautics and
Space Administration. The ground-based measurement program is funded by
NASA grant NNX09AF40G.
NR 22
TC 6
Z9 6
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD JAN 27
PY 2011
VL 116
AR D02307
DI 10.1029/2010JD014732
PG 9
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 713SI
UT WOS:000286757300010
ER
PT J
AU Nedoluha, GE
Gomez, RM
Hicks, BC
Helmboldt, J
Bevilacqua, RM
Lambert, A
AF Nedoluha, Gerald E.
Gomez, R. Michael
Hicks, Brian C.
Helmboldt, Joe
Bevilacqua, Richard M.
Lambert, Alyn
TI Ground-based microwave measurements of water vapor from the
midstratosphere to the mesosphere
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID TEMPERATURE; ATMOSPHERE
AB We present 5 months of retrievals from a new Water Vapor Millimeter-wave Spectrometer (WVMS) instrument that has been deployed at Table Mountain, California (34.4 degrees N, 242.3 degrees E). The single most important improvement over previous WVMS instruments is that instead of a set of 90 filters, this instrument has a fast Fourier transform spectrometer that provides 16,384 channels across 500 MHz, with a channel bandwidth of similar to 30 kHz. The additional information provided by this spectrometer makes it possible to extend the altitude range of the WVMS measurements from the current similar to 40-80 km range to similar to 26-80 km. We present details of the retrieval scheme and study the effects on the retrieved profiles of fitting instrumental baseline components. We compare the retrievals to coincident measurements from the NASA Aura Microwave Limb Sounder (MLS) instrument with a particular emphasis on understanding the stability of the 26 km retrievals. While the retrieval is sensitive to variations at this altitude, neither the MLS-retrieved water vapor mixing ratios nor those retrieved by WVMS show much variation over the 5 month period: a good indication of the stability of both instruments.
C1 [Nedoluha, Gerald E.; Gomez, R. Michael; Hicks, Brian C.; Helmboldt, Joe; Bevilacqua, Richard M.] USN, Res Lab, Washington, DC 20375 USA.
[Lambert, Alyn] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Nedoluha, GE (reprint author), USN, Res Lab, 4555 Overlook Ave,Code 7227, Washington, DC 20375 USA.
EM nedoluha@nrl.navy.mil
RI Helmboldt, Joseph/C-8105-2012
FU National Aeronautics and Space Administration; NASA; Naval Research
Laboratory
FX We wish to thank S. McDermid, D. Walsh, and T. LeBlanc at Mauna Loa for
their technical assistance. Work at the Jet Propulsion Laboratory,
California Institute of Technology, was carried out under a contract
with the National Aeronautics and Space Administration. This project was
funded by NASA under the Upper Atmosphere Research Program and by the
Naval Research Laboratory.
NR 17
TC 12
Z9 12
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD JAN 27
PY 2011
VL 116
AR D02309
DI 10.1029/2010JD014728
PG 11
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 713SI
UT WOS:000286757300009
ER
PT J
AU Shulman, I
Moline, MA
Penta, B
Anderson, S
Oliver, M
Haddock, SHD
AF Shulman, Igor
Moline, Mark A.
Penta, Bradley
Anderson, Stephanie
Oliver, Matthew
Haddock, Steven H. D.
TI Observed and modeled bio-optical, bioluminescent, and physical
properties during a coastal upwelling event in Monterey Bay, California
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID DATA ASSIMILATION; ECOSYSTEM MODELS; OCEAN; SEA
AB During spring and summer time, coastal upwelling influences circulation and ecosystem dynamics of the Monterey Bay, California, which is recognized as a National Marine Sanctuary. Observations of physical, bio-optical properties (including bioluminescence) together with results from dynamical biochemical and bioluminescence models are used to interpret the development of the upwelling event during August 2003 in Monterey Bay, California. Observations and the biochemical model show the development of a phytoplankton bloom in the southern portion of Monterey Bay. Model results show an increase of nutrients in the southern portion of the bay, where nutrient-rich water masses are brought in by the southward flow and cyclonic circulation inside the bay. This increase in nutrients together with the sluggish circulation in the southern portion of the bay provides favorable conditions for phytoplankton growth. Our observations and models suggest that with the development of upwelling the offshore water masses with the subsurface layer of bioluminescent zooplankton were replaced by water masses advected from the northern coast of the bay with a relatively high presence of mostly nonbioluminescent phytoplankton. Inshore observations from autonomous underwater vehicles (AUVs) show consistent coincidence of chlorophyll, backscatter, and bioluminescence maxima during upwelling development. Offshore AUV observations (taken at the entrance to the bay) show a deeper bioluminescence maximum below the surface layers of high chlorophyll and backscatter values during the earlier stages of upwelling development. Later, the observed deep offshore bioluminescence maximum disappeared and became a shallower and much weaker signal, coinciding with high chlorophyll and backscatter values offshore. Based on the biochemical and bioluminescence models, a methodology for estimating the nighttime water-leaving radiance due to stimulated bioluminescence is demonstrated and evaluated.
C1 [Shulman, Igor; Penta, Bradley; Anderson, Stephanie] USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
[Haddock, Steven H. D.] Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039 USA.
[Moline, Mark A.] Calif Polytech State Univ San Luis Obispo, Ctr Marine & Coastal Sci, Dept Biol Sci, San Luis Obispo, CA 93407 USA.
[Oliver, Matthew] Univ Delaware, Coll Marine & Earth Sci, Lewes, DE 19958 USA.
RP Shulman, I (reprint author), USN, Res Lab, Div Oceanog, Bldg 1009, Stennis Space Ctr, MS 39529 USA.
EM igor.shulman@nrlssc.navy.mil
FU Office of Naval Research [N0001409WX20966, N0001410WX20482,
N0001409AF00002, N0001410AF00002]; Department of Defense High
Performance Computing Initiative
FX This research was funded through the Naval Research Laboratory (NRL)
project, "Bio-optical Studies of Predictability and Assimilation in the
Coastal Environment" under program element 61153N and grants
N0001409WX20966, N0001410WX20482, N0001409AF00002, and N0001410AF00002,
sponsored by the Office of Naval Research, Marine Mammals and Biology
Program. We are grateful to the whole AOSN team for discussions and
their collaborations. We thank Jeff Paduan of NPS for collaborations on
HF radar surface currents and Dmitri Nechaev of USM for helpful
discussions about adjoint. Our thanks also go to Fei Chai and Lei Shi of
UMaine for help with the biochemical model. Mooring data were provided
by Francisco Chavez of MBARI. We thank Peter Sakalaukus of USM for
programming and computer support. Computer time for the numerical
simulations was provided through a grant from the Department of Defense
High Performance Computing Initiative. This manuscript is NRL
contribution 7330-10-398.
NR 30
TC 8
Z9 8
U1 3
U2 12
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9275
EI 2169-9291
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD JAN 27
PY 2011
VL 116
AR C01018
DI 10.1029/2010JC006525
PG 13
WC Oceanography
SC Oceanography
GA 713UM
UT WOS:000286762900002
ER
PT J
AU Lau, KC
Dunlap, BI
AF Lau, Kah Chun
Dunlap, Brett I.
TI Molecular dynamics simulation of yttria-stabilized zirconia (YSZ)
crystalline and amorphous solids
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID MONTE-CARLO-SIMULATION; OXIDE FUEL-CELLS; OXYGEN-ION TRANSPORT; DEFECT
STRUCTURE; ELECTRICAL-CONDUCTIVITY; COMPUTER-SIMULATION;
ROOM-TEMPERATURE; CUBIC ZIRCONIA; THIN-FILMS; DIFFUSION
AB An empirically fitted atomic potential allows a classical molecular dynamics study of the static and dynamic properties of both crystalline and amorphous yttria-stabilized zirconia (YSZ) with typical dilute Y2O3 concentrations (i.e. 3.0-12.0 mol% Y2O3) in the temperature range 300-1400 K. Based on the rigid ion model approximation, we find, regardless of the distinctly different geometries, that the oxygen ionic conductivity shows a maximum at similar to 8.0 mol% Y2O3, close to the experimental maximum. A lower absolute ionic conductivity is found for the high density YSZ amorphous solid, relative to crystalline YSZ, consistent with the trends observed in crystalline and stabilized amorphous thin films of YSZ reported in experiments. Different from YSZ crystals, intriguing features of mutual diffusion among the heavy cations and mobile anions are found in the amorphous phase.
C1 [Lau, Kah Chun] George Washington Univ, Dept Chem, Washington, DC 20052 USA.
[Dunlap, Brett I.] USN, Res Lab, Washington, DC 20375 USA.
RP Lau, KC (reprint author), George Washington Univ, Dept Chem, Washington, DC 20052 USA.
EM kclau@anl.gov
RI Lau, Kah Chun/A-9348-2013;
OI Lau, Kah Chun/0000-0002-4925-3397; Dunlap, Brett/0000-0003-1356-6559
FU Office of Naval Research through the Naval Research Laboratory
FX We thank the Naval Research Laboratory's High Performance Computing
Project Investment Center for a large amount of computer time. The
Office of Naval Research, directly and through the Naval Research
Laboratory, supported this research.
NR 82
TC 21
Z9 21
U1 1
U2 31
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD JAN 26
PY 2011
VL 23
IS 3
AR 035401
DI 10.1088/0953-8984/23/3/035401
PG 16
WC Physics, Condensed Matter
SC Physics
GA 702UJ
UT WOS:000285921100007
PM 21406863
ER
PT J
AU Hong, JR
Katz, J
Schultz, MP
AF Hong, Jiarong
Katz, Joseph
Schultz, Michael P.
TI Near-wall turbulence statistics and flow structures over
three-dimensional roughness in a turbulent channel flow
SO JOURNAL OF FLUID MECHANICS
LA English
DT Article
DE boundary layers; boundary layer structure; turbulent boundary layers
ID PARTICLE IMAGE VELOCIMETRY; DIRECT NUMERICAL-SIMULATION; SMALL-SCALE
TURBULENCE; BOUNDARY-LAYERS; REYNOLDS-NUMBER; SURFACE-ROUGHNESS; FULLY
ROUGH; TRANSITIONALLY-ROUGH; EXPERIMENTAL SUPPORT; SPATIAL-RESOLUTION
AB Utilizing an optically index-matched facility and high-resolution particle image velocimetry measurements, this paper examines flow structure and turbulence in a rough-wall channel flow for Re-t in the 3520-5360 range. The scales of pyramidal roughness elements satisfy the 'well-characterized' flow conditions, with h/k approximate to 50 and k+ = 60 similar to 100, where h is half height of the channel and k is the roughness height. The near-wall turbulence measurements are sensitive to spatial resolution, and vary with Reynolds number. Spatial variations in the mean flow, Reynolds stresses, as well as the turbulent kinetic energy (TKE) production and dissipation rates are confined to y < 2k. All the Reynolds stress components have local maxima at slightly higher elevations, but the streamwise-normal component increases rapidly at y < k, peaking at the top of the pyramids. The TKE production and dissipation rates along with turbulence transport also peak near the wall. The spatial energy and shear spectra show an increasing contribution of large-scale motions and a diminishing role of small motions with increasing distance from the wall. As the spectra steepen at low wavenumbers, they flatten and develop bumps in wavenumbers corresponding to k - 3k, which fall in the dissipation range. Instantaneous realizations show that roughness-scale eddies are generated near the wall, and lifted up rapidly by large-scale structures that populate the outer layer. A linear stochastic estimation-based analysis shows that the latter share common features with hairpin packets. This process floods the outer layer with roughness-scale eddies, in addition to those generated by the energy-cascading process. Consequently, although the imprints of roughness diminish in the outer-layer Reynolds stresses, consistent with the wall similarity hypothesis, the small-scale turbulence contains a clear roughness signature across the entire channel.
C1 [Hong, Jiarong; Katz, Joseph] Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA.
[Schultz, Michael P.] USN Acad, Dept Naval Architecture & Ocean Engn, Annapolis, MD 21402 USA.
RP Katz, J (reprint author), Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA.
EM katz@jhu.edu
RI Schultz, Michael/C-3670-2008; Hang, Chen/H-5336-2011; Katz,
Joseph/A-7624-2010
OI Katz, Joseph/0000-0001-9067-2473
FU Office of Naval Research [N00014-06-1-0650]; ONR [N00014-06-1-0160];
DURIP [N00014-06-1-0556]
FX This research has been funded by the Office of Naval Research under
grant N00014-06-1-0650. The programme officer is Ronald Joslin.
Construction of the optically index-matched facility has been funded by
ONR, in part under grant N00014-06-1-0160, and in part by DURIP grant
N00014-06-1-0556. The programme officer is Ki Han Kim. The authors would
like to thank Yury Ronzhes for designing the new facility, as well as
Siddharth Talapatra, Joshi Pranav and Huixuan Wu for their help during
the experiments.
NR 70
TC 52
Z9 53
U1 4
U2 30
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-1120
EI 1469-7645
J9 J FLUID MECH
JI J. Fluid Mech.
PD JAN 25
PY 2011
VL 667
BP 1
EP 37
DI 10.1017/S0022112010003988
PG 37
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 717MU
UT WOS:000287052900001
ER
PT J
AU Hofmann, T
Boosalis, A
Kuhne, P
Herzinger, CM
Woollam, JA
Gaskill, DK
Tedesco, JL
Schubert, M
AF Hofmann, T.
Boosalis, A.
Kuehne, P.
Herzinger, C. M.
Woollam, J. A.
Gaskill, D. K.
Tedesco, J. L.
Schubert, M.
TI Hole-channel conductivity in epitaxial graphene determined by terahertz
optical-Hall effect and midinfrared ellipsometry
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID GAS
AB We report noncontact, optical determination of free-charge carrier mobility, sheet density, and resistivity parameters in epitaxial graphene at room temperature using terahertz and midinfrared ellipsometry and optical-Hall effect measurements. The graphene layers are grown on Si- and C-terminated semi-insulating 6H silicon carbide polar surfaces. Data analysis using classical Drude functions and multilayer modeling render the existence of a p-type channel with different sheet densities and effective mass parameters for the two polar surfaces. The optically obtained parameters are in excellent agreement with results from electrical Hall effect measurements. (c) 2011 American Institute of Physics. [doi:10.1063/1.3548543]
C1 [Hofmann, T.; Boosalis, A.; Kuehne, P.; Schubert, M.] Univ Nebraska, Dept Elect Engn, Lincoln, NE 68588 USA.
[Hofmann, T.; Boosalis, A.; Kuehne, P.; Schubert, M.] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE USA.
[Herzinger, C. M.; Woollam, J. A.] JA Woollam Co Inc, Lincoln, NE 68508 USA.
[Gaskill, D. K.; Tedesco, J. L.] USN, Res Lab, Washington, DC 20375 USA.
RP Hofmann, T (reprint author), Univ Nebraska, Dept Elect Engn, Lincoln, NE 68588 USA.
EM thofmann@engr.unl.edu
RI Hofmann, Tino/B-9194-2013; Schubert, Mathias/B-2676-2017; Kuhne,
Philipp/D-1840-2017
OI Hofmann, Tino/0000-0003-3362-9959; Schubert,
Mathias/0000-0001-6238-663X; Kuhne, Philipp/0000-0002-8827-7404
FU Army Research Office [W911NF-09-C-0097]; National Science Foundation
[MRSEC DMR-0820521, MRI DMR-0922937, DMR-0907475]; University of
Nebraska-Lincoln; J.A. Woollam Foundation; Office of Naval Research;
American Society for Engineering Education-Naval Research Laboratory
FX The authors would like to acknowledge financial support from the Army
Research Office (D. Woolard, Contract No. W911NF-09-C-0097), the
National Science Foundation (Grant Nos. MRSEC DMR-0820521, MRI
DMR-0922937, DMR-0907475), the University of Nebraska-Lincoln, the J.A.
Woollam Foundation, and the Office of Naval Research. J.L.T.
acknowledges support from the American Society for Engineering
Education-Naval Research Laboratory Postdoctoral Fellowship Program.
NR 22
TC 24
Z9 24
U1 3
U2 31
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 24
PY 2011
VL 98
IS 4
AR 041906
DI 10.1063/1.3548543
PG 3
WC Physics, Applied
SC Physics
GA 712OR
UT WOS:000286676600013
ER
PT J
AU Mehl, MJ
Hart, GLW
Curtarolo, S
AF Mehl, Michael J.
Hart, Gus L. W.
Curtarolo, Stefano
TI Density functional study of the L1(0)-alpha IrV transition in IrV and
RhV
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE Structural phase transitions; Jahn-Teller; Electronic structure; Density
functional theory; Ordered intermetallic alloys
ID INITIO MOLECULAR-DYNAMICS; HIGH-THROUGHPUT; CONSTITUTION DIAGRAM;
PERTURBATION-THEORY; METALS; ALLOYS; SURFACES; SYSTEMS; PHASES; ENERGY
AB Both IrV and RhV crystallize in the alpha IrV structure, with a transition to the higher symmetry L1(0) structure at high temperature, or with the addition of excess Ir or Rh. Here we present evidence that this transition is driven by the lowering of the electronic density of states at the Fermi level of the alpha IrV structure. The transition has long been thought to be second order, with a simple doubling of the L1(0) unit cell due to an unstable phonon at the R point (0 1/2 1/2). We use first-principles calculations to show that all phonons at the R point are, in fact, stable, but do find a region of reciprocal space where the L1(0) structure has unstable (imaginary frequency) phonons. We use the frozen phonon method to examine two of these modes, relaxing the structures associated with the unstable phonon modes to obtain new structures which are lower in energy than L1(0) but still above alpha IrV. We examine the phonon spectra of these structures as well, looking for instabilities, and find further instabilities, and more relaxed structures, all of which have energies above the alpha IrV phase. In addition, we find that all of the relaxed structures, stable and unstable, have a density comparable to the L1(0) phase (and less than the alpha IrV phase), so that any transition from one of these structures to the ground state will have a volume change as well as an energy discontinuity. We conclude that the transition from L1(0) to alpha IrV is probably weakly first order. We also examine the behavior of similar compounds, and show that the alpha IrV structures of both IrTi and RhTi are lower in energy than the experimentally observed high-temperature L1(0) structure. Published by Elsevier B.V.
C1 [Mehl, Michael J.] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
[Hart, Gus L. W.] Brigham Young Univ, Dept Phys & Astron, Provo, UT 84602 USA.
[Curtarolo, Stefano] Duke Univ, Dept Mech Engn & Mat Sci, Durham, NC 27708 USA.
[Curtarolo, Stefano] Duke Univ, Dept Phys, Durham, NC 27708 USA.
RP Mehl, MJ (reprint author), USN, Res Lab, Ctr Computat Mat Sci, Code 6390, Washington, DC 20375 USA.
EM Michael.Mehl@nrl.navy.mil
RI Mehl, Michael/H-8814-2016
FU United States Office of Naval Research (ONR); United States National
Science Foundation (NSF) [DMR-0639822]; NSF [DMR-0650406, DMR-0908753];
ONR [N00014-07-1-0878, N00014-07-1-1085, N00014-09-1-0921,
N00014-10-1-0436]
FX M.J. Mehl is supported by the United States Office of Naval Research
(ONR). S. Curtarolo acknowledges support by ONR (N00014-07-1-0878,
N00014-07-1-1085, N00014-09-1-0921, and N00014-10-1-0436), and the
United States National Science Foundation (NSF) (DMR-0639822). G.L.W.
Hart is grateful for support from the NSF through grants DMR-0650406 and
DMR-0908753 Many of the computations reported here, including all of the
VASP calculations, were performed at the Air Force Research Laboratory
Department of Defense Supercomputing Resource Center, Wright-Patterson
Air Force Base, Dayton OH, under a grant from the DoD High Performance
Computing Modernization Program.
NR 47
TC 1
Z9 1
U1 0
U2 3
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD JAN 21
PY 2011
VL 509
IS 3
BP 560
EP 567
DI 10.1016/j.jallcom.2010.08.102
PG 8
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 694SF
UT WOS:000285318400005
ER
PT J
AU Grappin, R
Wang, YM
Pantellini, F
AF Grappin, R.
Wang, Y. -M.
Pantellini, F.
TI TWO-TEMPERATURE MODELS FOR POLAR PLUMES: COOLING BY MEANS OF STRONG BASE
HEATING
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE solar wind; Sun: corona; Sun: heliosphere; Sun: magnetic topology; Sun:
transition region; Sun: UV radiation
ID SOLAR-WIND; CORONAL HOLE; NETWORK; ACCELERATION; TEMPERATURE; EXPANSION;
FLUX; MASS
AB In earlier one-fluid hydrodynamical calculations incorporating heat conduction and radiative losses, it was shown that the high densities in polar plumes could be reproduced by including a concentrated heat source near the plume base, in addition to the global heating required in both the plume and interplume regions of the coronal hole. The extra heating (attributed to interchange reconnection between the open flux and an underlying magnetic bipole) results in lower flow speeds and temperatures relative to the interplume gas, predictions that have since been confirmed by spectroscopic measurements. Here, the model is extended to the two-fluid case, in which ions and electrons are allowed to have different temperatures, coupling is via Coulomb collisions, and heat transport is mainly by electrons. Again, we find that depositing energy very close to the coronal base, in either the protons or electrons (or both), raises the densities and decreases the flow speeds everywhere along the flux tube. The higher densities in turn act to lower the ion temperatures by coupling the protons more closely to the energy-losing electrons. In addition, we find that energy must be deposited globally in both the electrons and the ions; without this direct heating, the electrons would end up cooler in the interplume region than in the plume, contrary to observations. Increasing the rate of flux-tube expansion has the effect of lowering the electron and ion temperatures and reducing the asymptotic flow speed, both in the plume and the interplume region; the observed densities and temperatures can be matched by taking the magnetic field to fall off with radius roughly as r(-4).
C1 [Grappin, R.] Univ Paris Diderot, LUTH, Observ Paris, CNRS, F-92195 Meudon, France.
[Grappin, R.] Ecole Polytech, CNRS, LPP, F-91128 Palaiseau, France.
[Wang, Y. -M.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Pantellini, F.] Univ Paris Diderot, LESIA, Observ Paris, CNRS, F-92195 Meudon, France.
RP Grappin, R (reprint author), Univ Paris Diderot, LUTH, Observ Paris, CNRS, F-92195 Meudon, France.
EM roland.grappin@obspm.fr; yi.wang@nrl.navy.mil;
filippo.pantellini@obspm.fr
FU CNRS; NASA; Office of Naval Research
FX We thank G. Belmont for stimulating discussions and the referee for
helpful comments. This work was supported by CNRS, NASA, and the Office
of Naval Research.
NR 23
TC 6
Z9 6
U1 0
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 20
PY 2011
VL 727
IS 1
AR 30
DI 10.1088/0004-637X/727/1/30
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 703PT
UT WOS:000285992000030
ER
PT J
AU Lean, JL
Woods, TN
Eparvier, FG
Meier, RR
Strickland, DJ
Correira, JT
Evans, JS
AF Lean, J. L.
Woods, T. N.
Eparvier, F. G.
Meier, R. R.
Strickland, D. J.
Correira, J. T.
Evans, J. S.
TI Solar extreme ultraviolet irradiance: Present, past, and future
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID XUV PHOTOMETER SYSTEM; EUV IRRADIANCE; MAUNDER MINIMUM; REFERENCE
SPECTRUM; MGII INDEX; QUIET SUN; NEW-MODEL; VARIABILITY; DAYGLOW; FLUX
AB New models of solar extreme ultraviolet (EUV) irradiance variability are constructed in 1 nm bins from 0 to 120 nm using multiple regression of the Mg II and F-10.7 solar activity indices with irradiance observations made during the descending phase of cycle 23. The models have been used to reconstruct EUV spectra daily since 1950, annually since 1610, to forecast daily EUV irradiance and to estimate future levels in cycle 24. A two-component model developed by scaling the observed rotational modulation of the two solar indices underestimates the solar cycle changes that the Solar EUV Experiment (SEE) reports at wavelengths shorter than 40 nm and longer than 80 nm. A three-component model implemented by including an additional term derived from the smoothed Mg II index better reproduces the measurements at all wavelengths. The three-component model is consistent with variations in the EUV energy from 0 to 45 nm that produces the far ultraviolet (FUV) terrestrial dayglow observed by the Global Ultraviolet Imager (GUVI). However, the spectral structure of this third component is complex, and its origin is uncertain. Analogous two-and three-component models are also developed with absolute scales determined by the NRLEUV2 spectrum of the quiet Sun rather than by the SEE average spectrum. Assessment of the EUV absolute spectrum and variability of the four different models indicate that during solar cycle 23, the EUV irradiance (0 to 120 nm) increased 100 +/- 30%, from 2.9 +/- 0.2 to 5.8 +/- 0.9 mWm(-2), and may have been as low as 1.9 +/- 0.5 mWm(-2) during the 17th-century Maunder Minimum. Near the peak of upcoming solar cycle 24, EUV irradiance is expected to increase 40% to 80% above the 2008 minimum values.
C1 [Lean, J. L.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Strickland, D. J.; Correira, J. T.; Evans, J. S.] Computat Phys Inc, Springfield, VA 22151 USA.
[Woods, T. N.; Eparvier, F. G.] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80303 USA.
[Meier, R. R.] George Mason Univ, Dept Phys & Astron, Fairfax, VA 22030 USA.
RP Lean, JL (reprint author), USN, Res Lab, Div Space Sci, Code 7605,4555 Overlook Ave, Washington, DC 20375 USA.
EM judith.lean@nrl.navy.mil
RI Meier, Robert/G-4749-2014;
OI Meier, Robert/0000-0001-8497-7115; Lean, Judith/0000-0002-0087-9639
FU NASA; ONR
FX NASA and ONR funded this work. Harry Warren made available the NRLEUV2
quiet Sun solar spectrum. The NRLSSI model is available on the LISIRD
and SOLARIS web sites.
NR 53
TC 43
Z9 44
U1 1
U2 9
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD JAN 20
PY 2011
VL 116
AR A01102
DI 10.1029/2010JA015901
PG 18
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 710PD
UT WOS:000286522800005
ER
PT J
AU Adams, JT
Gray, DJ
AF Adams, James T.
Gray, Deric J.
TI Neutral points in an atmosphere-ocean system. 2: Downwelling light field
SO APPLIED OPTICS
LA English
DT Article
ID RADIANCE DISTRIBUTION MEASUREMENT; SKY POLARIZATION; RADIATION;
SKYLIGHT; SURFACE; RAYLEIGH; WATER
AB We use a Monte Carlo code that calculates the complete Stokes vector to predict the degree of polarization in the complete observable solid angle at any level in an atmosphere-ocean system. Using the Stokes vector components, we can find the positions of neutral points in a simulated plane-parallel atmosphere-ocean system for various conditions. We examine the locations and behavior of these neutral points for an observer placed directly above and beneath the air-water boundary and show how their positions are influenced by different atmospheric and oceanic conditions. (C) 2011 Optical Society of America
C1 [Adams, James T.] ISPA Technol, Alexandria, VA 22315 USA.
[Gray, Deric J.] USN, Res Lab, Washington, DC 20375 USA.
RP Adams, JT (reprint author), ISPA Technol, 5901 Kingstowne Village Pkwy, Alexandria, VA 22315 USA.
EM james_t_adams@hotmail.com
FU Naval Research Laboratory (NRL) [72-9857]
FX We thank George W. Kattawar, Charles N. Adams, and Keith Hall for useful
discussions, support, and advice. We also thank the two reviewers whose
suggestions significantly improved this paper. This project was
supported in part by the Naval Research Laboratory (NRL) through project
72-9857.
NR 36
TC 9
Z9 10
U1 0
U2 4
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD JAN 20
PY 2011
VL 50
IS 3
BP 335
EP 346
DI 10.1364/AO.50.000335
PG 12
WC Optics
SC Optics
GA 710JK
UT WOS:000286507600017
PM 21263732
ER
PT J
AU Torres, G
Fressin, F
Batalha, NM
Borucki, WJ
Brown, TM
Bryson, ST
Buchhave, LA
Charbonneau, D
Ciardi, DR
Dunham, EW
Fabrycky, DC
Ford, EB
Gautier, TN
Gilliland, RL
Holman, MJ
Howell, SB
Isaacson, H
Jenkins, JM
Koch, DG
Latham, DW
Lissauer, JJ
Marcy, GW
Monet, DG
Prsa, A
Quinn, SN
Ragozzine, D
Rowe, JF
Sasselov, DD
Steffen, JH
Welsh, WF
AF Torres, Guillermo
Fressin, Francois
Batalha, Natalie M.
Borucki, William J.
Brown, Timothy M.
Bryson, Stephen T.
Buchhave, Lars A.
Charbonneau, David
Ciardi, David R.
Dunham, Edward W.
Fabrycky, Daniel C.
Ford, Eric B.
Gautier, Thomas N., III
Gilliland, Ronald L.
Holman, Matthew J.
Howell, Steve B.
Isaacson, Howard
Jenkins, Jon M.
Koch, David G.
Latham, David W.
Lissauer, Jack J.
Marcy, Geoffrey W.
Monet, David G.
Prsa, Andrej
Quinn, Samuel N.
Ragozzine, Darin
Rowe, Jason F.
Sasselov, Dimitar D.
Steffen, Jason H.
Welsh, William F.
TI MODELING KEPLER TRANSIT LIGHT CURVES AS FALSE POSITIVES: REJECTION OF
BLEND SCENARIOS FOR KEPLER-9, AND VALIDATION OF KEPLER-9 d, A
SUPER-EARTH-SIZE PLANET IN A MULTIPLE SYSTEM
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE binaries: eclipsing; planetary systems; stars: individual (Kepler-9, KIC
3323887, KOI-377); stars: statistics
ID STAR; CANDIDATES; MASS; PARAMETERS; EVOLUTION
AB Light curves from the Kepler Mission contain valuable information on the nature of the phenomena producing the transit-like signals. To assist in exploring the possibility that they are due to an astrophysical false positive, we describe a procedure (BLENDER) to model the photometry in terms of a "blend" rather than a planet orbiting a star. A blend may consist of a background or foreground eclipsing binary (or star-planet pair) whose eclipses are attenuated by the light of the candidate and possibly other stars within the photometric aperture. We apply BLENDER to the case of Kepler-9 (KIC 3323887), a target harboring two previously confirmed Saturn-size planets (Kepler-9 b and Kepler-9 c) showing transit timing variations, and an additional shallower signal with a 1.59 day period suggesting the presence of a super-Earth-size planet. Using BLENDER together with constraints from other follow-up observations we are able to rule out all blends for the two deeper signals and provide independent validation of their planetary nature. For the shallower signal, we rule out a large fraction of the false positives that might mimic the transits. The false alarm rate for remaining blends depends in part (and inversely) on the unknown frequency of small-size planets. Based on several realistic estimates of this frequency, we conclude with very high confidence that this small signal is due to a super-Earth-size planet (Kepler-9 d) in a multiple system, rather than a false positive. The radius is determined to be 1.64(-0.14)(+0.19) R-circle plus, and current spectroscopic observations are as yet insufficient to establish its mass.
C1 [Torres, Guillermo; Fressin, Francois; Charbonneau, David; Fabrycky, Daniel C.; Holman, Matthew J.; Latham, David W.; Quinn, Samuel N.; Ragozzine, Darin; Sasselov, Dimitar D.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Batalha, Natalie M.] San Jose State Univ, San Jose, CA 95192 USA.
[Borucki, William J.; Bryson, Stephen T.; Koch, David G.; Lissauer, Jack J.; Rowe, Jason F.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
[Brown, Timothy M.] Las Cumbres Observ Global Telescope, Goleta, CA 93117 USA.
[Buchhave, Lars A.] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark.
[Ciardi, David R.] CALTECH, NASA Exoplanet Sci Inst, Pasadena, CA 91125 USA.
[Dunham, Edward W.] Lowell Observ, Flagstaff, AZ 86001 USA.
[Ford, Eric B.] Univ Florida, Gainesville, FL 32611 USA.
[Gautier, Thomas N., III] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Gilliland, Ronald L.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Howell, Steve B.] Natl Opt Astron Observ, Tucson, AZ 85719 USA.
[Isaacson, Howard] San Francisco State Univ, San Francisco, CA 94132 USA.
[Jenkins, Jon M.] NASA, Ames Res Ctr, SETI Inst, Moffett Field, CA 94035 USA.
[Marcy, Geoffrey W.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Monet, David G.] USN, Observ, Flagstaff, AZ 86001 USA.
[Prsa, Andrej] Villanova Univ, Villanova, PA 19085 USA.
[Steffen, Jason H.] Fermilab Ctr Particle Astrophys, Batavia, IL 60510 USA.
[Welsh, William F.] San Diego State Univ, San Diego, CA 92182 USA.
RP Torres, G (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM gtorres@cfa.harvard.edu
RI Ragozzine, Darin/C-4926-2013;
OI Buchhave, Lars A./0000-0003-1605-5666; Ciardi,
David/0000-0002-5741-3047; Charbonneau, David/0000-0002-9003-484X;
Fabrycky, Daniel/0000-0003-3750-0183
FU NASA
FX Funding for this Discovery mission is provided by NASA's Science Mission
Directorate. We are grateful to Leo Girardi for computing isochrones for
this work in the Kepler passband, to Frederic Pont for very helpful
discussions on false alarm probabilities, and to David Sing for advice
on limb-darkening coefficients. We also thank the anonymous referee for
insightful comments on the original version of this paper.
NR 44
TC 117
Z9 119
U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 20
PY 2011
VL 727
IS 1
AR 24
DI 10.1088/0004-637X/727/1/24
PG 18
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 703PT
UT WOS:000285992000024
ER
PT J
AU Warren, HP
Ugarte-Urra, I
Young, PR
Stenborg, G
AF Warren, Harry P.
Ugarte-Urra, Ignacio
Young, Peter R.
Stenborg, Guillermo
TI THE TEMPERATURE DEPENDENCE OF SOLAR ACTIVE REGION OUTFLOWS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: corona
ID ULTRAVIOLET IMAGING SPECTROMETER; HELIOSPHERIC MAGNETIC-FIELDS;
NONTHERMAL VELOCITIES; TRANSITION REGION; ATOMIC DATABASE;
EMISSION-LINES; HINODE-EIS; LOOPS; CORONA; FLOWS
AB Spectroscopic observations with the EUV Imaging Spectrometer (EIS) on Hinode have revealed large areas of high-speed outflows at the periphery of many solar active regions. These outflows are of interest because they may connect to the heliosphere and contribute to the solar wind. In this paper, we use slit rasters from EIS in combination with narrowband slot imaging to study the temperature dependence and morphology of an outflow region and show that it is more complicated than previously thought. Outflows are observed primarily in emission lines from Fe XI to Fe XV. Observations at lower temperatures (Si VII), in contrast, show bright fan-like structures that are dominated by inflows. These data also indicate that the morphology of the outflows and the fans is different, outflows are observed in regions where there is no emission in Si VII. This suggests that the fans, which are often associated with outflows in studies involving imaging data, are not directly related to the active region outflows.
C1 [Warren, Harry P.; Ugarte-Urra, Ignacio; Young, Peter R.; Stenborg, Guillermo] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Ugarte-Urra, Ignacio; Young, Peter R.] George Mason Univ, Coll Sci, Fairfax, VA 22030 USA.
[Stenborg, Guillermo] Interferometrics Inc, Herndon, VA 20171 USA.
RP Warren, HP (reprint author), USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RI Ugarte-Urra, Ignacio/B-1241-2009;
OI Ugarte-Urra, Ignacio/0000-0001-5503-0491
NR 30
TC 40
Z9 40
U1 0
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 20
PY 2011
VL 727
IS 1
AR 58
DI 10.1088/0004-637X/727/1/58
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 703PT
UT WOS:000285992000058
ER
PT J
AU Brooks, DH
Warren, HP
AF Brooks, David H.
Warren, Harry P.
TI ESTABLISHING A CONNECTION BETWEEN ACTIVE REGION OUTFLOWS AND THE SOLAR
WIND: ABUNDANCE MEASUREMENTS WITH EIS/HINODE
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE solar wind; Sun: abundances; Sun: corona
ID EUV IMAGING SPECTROMETER; HELIOSPHERIC MAGNETIC-FIELDS; EMISSION-LINES;
NONTHERMAL VELOCITIES; ELEMENTAL ABUNDANCES; TRANSITION REGION; ATOMIC
DATABASE; CORONAL HOLE; HINODE-EIS; ATMOSPHERE
AB One of the most interesting discoveries from Hinode is the presence of persistent high-temperature high-speed outflows from the edges of active regions (ARs). EUV imaging spectrometer (EIS) measurements indicate that the outflows reach velocities of 50 km s (1) with spectral line asymmetries approaching 200 km s (1). It has been suggested that these outflows may lie on open field lines that connect to the heliosphere, and that they could potentially be a significant source of the slow speed solar wind. A direct link has been difficult to establish, however. We use EIS measurements of spectral line intensities that are sensitive to changes in the relative abundance of Si and S as a result of the first ionization potential (FIP) effect, to measure the chemical composition in the outflow regions of AR 10978 over a 5 day period in 2007 December. We find that Si is always enhanced over S by a factor of 3-4. This is generally consistent with the enhancement factor of low FIP elements measured in situ in the slow solar wind by non-spectroscopic methods. Plasma with a slow wind-like composition was therefore flowing from the edge of the AR for at least 5 days. Furthermore, on December 10 and 11, when the outflow from the western side was favorably oriented in the Earth direction, the Si/S ratio was found to match the value measured a few days later by the Advanced Composition Explorer/Solar Wind Ion Composition Spectrometer. These results provide strong observational evidence for a direct connection between the solar wind, and the coronal plasma in the outflow regions.
C1 [Brooks, David H.] George Mason Univ, Coll Sci, Fairfax, VA 22030 USA.
[Warren, Harry P.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Brooks, DH (reprint author), ISAS JAXA, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2298510, Japan.
EM dhbrooks@ssd5.nrl.navy.mil
FU Naval Research Laboratory; NASA
FX We thank Yuan Kuen-Ko for very helpful discussions. This work was
performed under contract with the Naval Research Laboratory and was
funded by the NASA Hinode program. Hinode is a Japanese mission
developed and launched by ISAS/JAXA, with NAOJ as domestic partner and
NASA and STFC (UK) as international partners. It is operated by these
agencies in co-operation with ESA and NSC (Norway).
NR 46
TC 45
Z9 45
U1 0
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD JAN 20
PY 2011
VL 727
IS 1
AR L13
DI 10.1088/2041-8205/727/1/L13
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 703QG
UT WOS:000285993800013
ER
PT J
AU Ransom, SM
Ray, PS
Camilo, F
Roberts, MSE
Celik, O
Wolff, MT
Cheung, CC
Kerr, M
Pennucci, T
DeCesar, ME
Cognard, I
Lyne, AG
Stappers, BW
Freire, PCC
Grove, JE
Abdo, AA
Desvignes, G
Donato, D
Ferrara, EC
Gehrels, N
Guillemot, L
Gwon, C
Harding, AK
Johnston, S
Keith, M
Kramer, M
Michelson, PF
Parent, D
Parkinson, PMS
Romani, RW
Smith, DA
Theureau, G
Thompson, DJ
Weltevrede, P
Wood, KS
Ziegler, M
AF Ransom, S. M.
Ray, P. S.
Camilo, F.
Roberts, M. S. E.
Celik, Oe.
Wolff, M. T.
Cheung, C. C.
Kerr, M.
Pennucci, T.
DeCesar, M. E.
Cognard, I.
Lyne, A. G.
Stappers, B. W.
Freire, P. C. C.
Grove, J. E.
Abdo, A. A.
Desvignes, G.
Donato, D.
Ferrara, E. C.
Gehrels, N.
Guillemot, L.
Gwon, C.
Harding, A. K.
Johnston, S.
Keith, M.
Kramer, M.
Michelson, P. F.
Parent, D.
Parkinson, P. M. Saz
Romani, R. W.
Smith, D. A.
Theureau, G.
Thompson, D. J.
Weltevrede, P.
Wood, K. S.
Ziegler, M.
TI THREE MILLISECOND PULSARS IN FERMI LAT UNASSOCIATED BRIGHT SOURCES
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE pulsars: general; pulsars: individual (J0614-3329, J1231-1411,
J2214+3000)
ID LARGE-AREA TELESCOPE; DATA-ANALYSIS SYSTEMS; RAY-SPACE-TELESCOPE; X-RAY;
POPULATION; EMISSION; BINARY; DISCOVERY; RADIO
AB We searched for radio pulsars in 25 of the non-variable, unassociated sources in the Fermi LAT Bright Source List with the Green Bank Telescope at 820 MHz. We report the discovery of three radio and gamma-ray millisecond pulsars (MSPs) from a high Galactic latitude subset of these sources. All of the pulsars are in binary systems, which would have made them virtually impossible to detect in blind gamma-ray pulsation searches. They seem to be relatively normal, nearby (<= 2 kpc) MSPs. These observations, in combination with the Fermi detection of gamma-ray from other known radio MSPs, imply that most, if not all, radio MSPs are efficient gamma-ray producers. The gamma-ray spectra of the pulsars are power law in nature with exponential cutoffs at a few GeV, as has been found with most other pulsars. The MSPs have all been detected as X-ray point sources. Their soft X-ray luminosities of similar to 10(30)-10(31) erg s(-1) are typical of the rare radio MSPs seen in X-rays.
C1 [Ransom, S. M.] Natl Radio Astron Observ, Charlottesville, VA 22903 USA.
[Ray, P. S.; Wolff, M. T.; Grove, J. E.; Gwon, C.; Wood, K. S.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Camilo, F.] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA.
[Roberts, M. S. E.] Eureka Sci, Oakland, CA 94602 USA.
[Celik, Oe.; DeCesar, M. E.; Donato, D.; Ferrara, E. C.; Gehrels, N.; Harding, A. K.; Thompson, D. J.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Celik, Oe.; Donato, D.] CRESST, Greenbelt, MD 20771 USA.
[Celik, Oe.] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
[Celik, Oe.] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA.
[Cheung, C. C.; Abdo, A. A.] Natl Acad Sci, Natl Res Council Res Associate, Washington, DC 20001 USA.
[Kerr, M.; Michelson, P. F.; Romani, R. W.] Stanford Univ, Dept Phys, Kavli Inst Particle Astrophys & Cosmol, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA.
[Kerr, M.; Michelson, P. F.; Romani, R. W.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[Pennucci, T.] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.
[DeCesar, M. E.; Donato, D.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[DeCesar, M. E.; Donato, D.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Cognard, I.; Theureau, G.] CNRS, UMR 6115, LPCE, F-45071 Orleans 02, France.
[Cognard, I.; Theureau, G.] CNRS INSU, Observ Paris, Stn Radioastron Nancay, F-18330 Nancay, France.
[Lyne, A. G.; Stappers, B. W.; Kramer, M.; Weltevrede, P.] Univ Manchester, Jodrell Bank, Ctr Astrophys, Sch Phys & Astron, Manchester M13 9PL, Lancs, England.
[Freire, P. C. C.; Guillemot, L.; Kramer, M.] Max Planck Inst Radioastron, D-53121 Bonn, Germany.
[Desvignes, G.] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
[Desvignes, G.] Univ Calif Berkeley, Radio Astron Lab, Berkeley, CA 94720 USA.
[Johnston, S.; Keith, M.] Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Epping, NSW 1710, Australia.
[Parent, D.] George Mason Univ, Coll Sci, Fairfax, VA 22030 USA.
[Parkinson, P. M. Saz; Ziegler, M.] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA.
[Smith, D. A.] Univ Bordeaux 1, CNRS IN2p3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France.
RP Ransom, SM (reprint author), Natl Radio Astron Observ, Edgemont Rd, Charlottesville, VA 22903 USA.
EM sransom@nrao.edu; Paul.Ray@nrl.navy.mil
RI Thompson, David/D-2939-2012; Harding, Alice/D-3160-2012; Gehrels,
Neil/D-2971-2012;
OI Thompson, David/0000-0001-5217-9135; Roberts,
Mallory/0000-0002-9396-9720; Ransom, Scott/0000-0001-5799-9714; Ray,
Paul/0000-0002-5297-5278
FU NASA [NNG09EE57I]
FX We acknowledge helpful discussions with Natalie Webb and Lynne Valencic.
The National Radio Astronomy Observatory is a facility of the National
Science Foundation operated under cooperative agreement by Associated
Universities, Inc. This work was partially supported by NASA Grant No.
NNG09EE57I. The Fermi LAT Collaboration acknowledges support from a
number of agencies and institutes for both development and the operation
of the LAT as well as scientific data analysis. These include NASA and
DOE in the US, CEA/Irfu and IN2P3/CNRS in France, ASI and INFN in Italy,
MEXT, KEK, and JAXA in Japan, and the K.A. Wallenberg Foundation, the
Swedish Research Council and the National Space Board in Sweden.
Additional support from INAF in Italy and CNES in France for science
analysis during the operations phase is also gratefully acknowledged.
NR 33
TC 77
Z9 77
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD JAN 20
PY 2011
VL 727
IS 1
AR L16
DI 10.1088/2041-8205/727/1/L16
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 703QG
UT WOS:000285993800016
ER
PT J
AU Stavis, C
Clare, TL
Butler, JE
Radadia, AD
Carr, R
Zeng, HJ
King, WP
Carlisle, JA
Aksimentiev, A
Bashir, R
Hamers, RJ
AF Stavis, Courtney
Clare, Tami Lasseter
Butler, James E.
Radadia, Adarsh D.
Carr, Rogan
Zeng, Hongjun
King, William P.
Carlisle, John A.
Aksimentiev, Aleksei
Bashir, Rashid
Hamers, Robert J.
TI Surface functionalization of thin-film diamond for highly stable and
selective biological interfaces
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE biointerfaces; surface chemistry; cells
ID SELF-ASSEMBLED MONOLAYERS; NANOMETER-SCALE ROUGHNESS; ALIGNED CARBON
NANOFIBERS; PROTEIN ADSORPTION; PHOTOCHEMICAL FUNCTIONALIZATION;
ELECTRICAL DETECTION; MEDICAL APPLICATIONS; AMORPHOUS-CARBON; ADSORBED
PROTEIN; SILICON
AB Carbon is an extremely versatile family of materials with a wide range of mechanical, optical, and mechanical properties, but many similarities in surface chemistry. As one of the most chemically stable materials known, carbon provides an outstanding platform for the development of highly tunable molecular and biomolecular interfaces. Photochemical grafting of alkenes has emerged as an attractive method for functionalizing surfaces of diamond, but many aspects of the surface chemistry and impact on biological recognition processes remain unexplored. Here we report investigations of the interaction of functionalized diamond surfaces with proteins and biological cells using X-ray photoelectron spectroscopy (XPS), atomic force microscopy, and fluorescence methods. XPS data show that functionalization of diamond with short ethylene glycol oligomers reduces the nonspecific binding of fibrinogen below the detection limit of XPS, estimated as >97% reduction over H-terminated diamond. Measurements of different forms of diamond with different roughness are used to explore the influence of roughness on nonspecific binding onto H-terminated and ethylene glycol (EG)-terminated surfaces. Finally, we use XPS to characterize the chemical stability of Escherichia coli K12 antibodies on the surfaces of diamond and amine-functionalized glass. Our results show that antibody-modified diamond surfaces exhibit increased stability in XPS and that this is accompanied by retention of biological activity in cell-capture measurements. Our results demonstrate that surface chemistry on diamond and other carbon-based materials provides an excellent platform for biomolecular interfaces with high stability and high selectivity.
C1 [Stavis, Courtney; Clare, Tami Lasseter; Hamers, Robert J.] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA.
[Butler, James E.] USN, Res Lab, Washington, DC 20375 USA.
[Radadia, Adarsh D.; Bashir, Rashid] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA.
[Radadia, Adarsh D.; King, William P.; Bashir, Rashid] Univ Illinois, Micro & Nano Technol Lab, Urbana, IL 61801 USA.
[Carr, Rogan; Aksimentiev, Aleksei] Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
[Zeng, Hongjun; Carlisle, John A.] Adv Diamond Technol Inc, Romeoville, IL 60446 USA.
[King, William P.] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Bashir, Rashid] Univ Illinois, Dept Bioengn, Urbana, IL 61801 USA.
RP Hamers, RJ (reprint author), Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA.
EM rjhamers@wisc.edu
RI Butler, James/B-7965-2008; Hamers, Robert/C-6466-2008
OI Radadia, Adarsh/0000-0002-2791-0421; Aksimentiev,
Aleksei/0000-0002-6042-8442; Clare, Tami/0000-0003-2154-6275; Butler,
James/0000-0002-4794-7176; Hamers, Robert/0000-0003-3821-9625
FU National Science Foundation [CHE-0613010, CHE-0911543]; Defense Threat
Reduction Agency (DTRA) [HDTRA1-09-C-0007]; Naval Research
Laboratory/Office of Naval Research
FX This work was supported in part by the National Science Foundation
Grants CHE-0613010 and CHE-0911543, by the Defense Threat Reduction
Agency (DTRA) under Contract HDTRA1-09-C-0007, and by the Naval Research
Laboratory/Office of Naval Research.
NR 58
TC 38
Z9 38
U1 5
U2 72
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD JAN 18
PY 2011
VL 108
IS 3
BP 983
EP 988
DI 10.1073/pnas.1006660107
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 707TF
UT WOS:000286310300021
PM 20884854
ER
PT J
AU Buchowicz, G
Stone, PR
Robinson, JT
Cress, CD
Beeman, JW
Dubon, OD
AF Buchowicz, Grant
Stone, Peter R.
Robinson, Jeremy T.
Cress, Cory D.
Beeman, Jeffrey W.
Dubon, Oscar D.
TI Correlation between structure and electrical transport in ion-irradiated
graphene grown on Cu foils
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID AMORPHOUS-CARBON; DEFECTS; FILMS
AB Graphene grown by chemical vapor deposition and supported on SiO2 and sapphire substrates was studied following the controlled introduction of defects induced by 35 keV carbon ion irradiation. Changes in Raman spectra for fluences ranging from 10(12) to 10(15) cm(-2) indicate that the structure of graphene evolves from a highly ordered layer, to a patchwork of disordered domains, to an essentially amorphous film. These structural changes result in a dramatic decrease in the Hall mobility by orders of magnitude while, remarkably, the Hall concentration remains almost unchanged, suggesting that the Fermi level is pinned at a hole concentration near 1 x 10(13) cm(-2). A model for scattering by resonant scatterers is in good agreement with mobility measurements up to an ion fluence of 1 x 10(14) cm(-2). (C) 2011 American Institute of Physics. [doi:10.1063/1.3536529]
C1 [Buchowicz, Grant; Stone, Peter R.; Beeman, Jeffrey W.; Dubon, Oscar D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Buchowicz, Grant; Stone, Peter R.; Dubon, Oscar D.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Robinson, Jeremy T.; Cress, Cory D.] USN, Res Lab, Washington, DC 20375 USA.
RP Buchowicz, G (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM oddubon@berkeley.edu
RI Robinson, Jeremy/F-2748-2010;
OI Cress, Cory/0000-0001-7563-6693
FU Office of Science, Office of Basic Energy Sciences, and Division of
Materials Sciences and Engineering of the U.S. Department of Energy
[De-Ac02-05Ch11231]; National Science Foundation [DMR-0349257]; Office
of Naval Research; Defense Threat Reduction Agency under MIPR
[10-2197M]; NRL's Nanoscience Institute
FX The work at the Lawrence Berkeley National Laboratory (ion irradiation
and electrical characterization of graphene on SiO2) was
supported by the Director, Office of Science, Office of Basic Energy
Sciences, and Division of Materials Sciences and Engineering of the U.S.
Department of Energy under Contract No. De-Ac02-05Ch11231. O.D.D.
acknowledges support from the National Science Foundation under Contract
No. DMR-0349257 for electrical measurements of graphene on sapphire.
This work was supported in part by the Office of Naval Research, NRL's
Nanoscience Institute, and the Defense Threat Reduction Agency under
MIPR Grant No. 10-2197M.
NR 21
TC 26
Z9 27
U1 3
U2 22
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 17
PY 2011
VL 98
IS 3
AR 032102
DI 10.1063/1.3536529
PG 3
WC Physics, Applied
SC Physics
GA 709WC
UT WOS:000286471100020
ER
PT J
AU He, L
Tao, GH
Parrish, DA
Shreeve, JM
AF He, Ling
Tao, Guo-Hong
Parrish, Damon A.
Shreeve, Jean'ne M.
TI Liquid Dinitromethanide Salts
SO INORGANIC CHEMISTRY
LA English
DT Article
ID ENERGETIC IONIC LIQUIDS; NITROGEN-RICH SALTS; THEORETICAL-MODELS;
TRANSITION; CATALYSIS; SOLVENTS; SYSTEMS; ACID
AB The dinitromethanide (DNM) anion is a useful component of room temperature ionic liquids. Eight DNM ionic liquids with substituted imidazolium cations including 1-butyl-3-methylimidazolium (1), 1-allyl-3-methylimidazolium (2), 1-allyl-3-butylimidazolium (3), 1,3-diallylimidazolium (4), 1-(2'-methoxyl)ethyl-3-methylimidazolium (5), 1-(ethoxyl-methyl)-3-methylimidazolium (6), 1-(hydroxyethyl)-3-methylimidazolium (7), and 1,3-dimethylimidazolium (8) were obtained. DNM ionic liquids 1-8 were synthesized by metathesis reactions from the corresponding imidazolium halides with potassium dinitromethanide or silver dinitromethanide. These DNM ionic liquids have been fully characterized by IR NMR, elemental analysis, thermal stability, phase behavior, and viscosity. The molecular structure of 8 was determined by single-crystal X-ray diffraction. Compound 8 crystallizes in, the triclinic space group P (1) over bar, with a density of 1.453 g cm(-3) (a = 7.1402(19) angstrom, b = 9.376(3) angstrom, c = 13.793(4) angstrom, alpha = 103.759(4)degrees, beta = 90.757(4)degrees, gamma = 96.874(4)degrees, V = 889.6(4) angstrom(3), and Z = 4). Delocalization of both the DNM anion and dimethylimidazolium cation was found from the single-crystal structure data of 8. The heats of formation of 1-8 along with their detonation properties were investigated and analyzed. Their sensitivities toward impact were determined by BAM standards and found to be impact-insensitive (>40 J). The DNM-containing ionic liquids 1-7 are liquids at room temperature with desirable low viscosities. The temperature dependence of the viscosities for 1-7 was studied. These DNM ionic liquids were found to be a significant feature of glass-forming liquids. They also exhibit good liquid characteristics with desirable long liquidus ranges of more than 200 degrees C.
C1 [Shreeve, Jean'ne M.] Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
[He, Ling; Tao, Guo-Hong] Sichuan Univ, Coll Chem, Chengdu 610064, Sichuan, Peoples R China.
[Parrish, Damon A.] USN, Res Lab, Washington, DC 20375 USA.
RP Shreeve, JM (reprint author), Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
EM jshreeve@uidaho.edu
FU DTRA [HDTRA1-07-1-0024]; ONR [N00014-10-1-0097]
FX The authors gratefully acknowledge the support of DTRA (Grant
HDTRA1-07-1-0024) and ONR (Grant N00014-10-1-0097).
NR 52
TC 23
Z9 24
U1 0
U2 20
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
J9 INORG CHEM
JI Inorg. Chem.
PD JAN 17
PY 2011
VL 50
IS 2
BP 679
EP 685
DI 10.1021/ic101959r
PG 7
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 703EJ
UT WOS:000285956600037
PM 21142114
ER
PT J
AU Coslovich, D
Roland, CM
AF Coslovich, D.
Roland, C. M.
TI Heterogeneous slow dynamics and the interaction potential of
glass-forming liquids
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article
DE Density scaling; Fragility; Dynamic heterogeneity; Pressure-energy
correlations; Lennard-Jones potential; Mixtures; Network glass
ID PRESSURE
AB The role of the intermolecular interaction potential on the dynamic and thermodynamic properties of model glass-forming mixtures is investigated through molecular dynamics simulations. Variations of the repulsive exponent m in the well-studied Lennard-Jones Kob-Andersen mixture are shown to have a negligible effect on the fragility and dynamic correlation volumes when quenches are performed at constant pressure. The number of dynamically correlated particles, estimated from the temperature derivative of a two-point dynamic correlation function, is approximately invariant to m at any fixed relaxation time. Further, the density scaling property of a model tetrahedral network glass-former, based on inverse power law and Lennard-Jones potentials, is investigated. The optimal scaling exponent gamma is close to zero and does not superpose the data well. The breakdown of density scaling is consistent with the absence of correlation between fluctuations of the virial and the potential energy. These results emphasize the crucial role of structural many-body correlations in glass-forming systems and show the need of investigations of more complex and realistic model liquids. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Coslovich, D.] Vienna Univ Technol, Inst Theoret Phys, A-1060 Vienna, Austria.
[Roland, C. M.] USN, Res Lab, Washington, DC 20375 USA.
RP Coslovich, D (reprint author), Vienna Univ Technol, Inst Theoret Phys, A-1060 Vienna, Austria.
EM coslovich@cmt.tuwien.ac.at; roland@nrl.navy.mil
FU Austrian Science Fund (FWF) [P19890-N16]; Office of Naval Research
FX D.C. acknowledges financial support by the Austrian Science Fund (FWF)
(Project number: P19890-N16). The work at NRL was supported by the
Office of Naval Research.
NR 8
TC 5
Z9 5
U1 0
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD JAN 15
PY 2011
VL 357
IS 2
SI SI
BP 397
EP 400
DI 10.1016/j.jnoncrysol.2010.07.050
PG 4
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 725JK
UT WOS:000287640800027
ER
PT J
AU Habasaki, J
Ngai, KL
AF Habasaki, J.
Ngai, K. L.
TI Multifractal nature of heterogeneous dynamics and structures in glass
forming ionic liquids
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article
DE Ionic liquids; Molecular dynamics simulations; Dynamic heterogeneity;
Levy distribution; Multifractality
ID MOLECULAR-DYNAMICS; METASILICATE GLASS; TRANSITION; SIMULATIONS; FLUIDS
AB Complex dynamics and structures of ionic liquids exemplified in 1-ethyl-3-methylimidazolium nitrate (EMIM-NO(3)) are examined by molecular dynamics simulations. Correlation length of the radial charge distribution function and density distribution function show different temperature dependence. Density profiles are obtained from the accumulated positions visited by ions during the MD runs. The profile originating from the coexistence of layered structures of density (density wave) and those of charges (charge density wave), shows complicated heterogeneity, which is proven to be multifractal in nature. Thus, present is more than one characteristic length scale together with their mixing. The multifractal density profiles are formed by the multifractal walks with fast and slow ions. Generally, the coexistence of different length scales due to the different species or the different local structures can be the mechanism to form similar multifractal dynamics and structures. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Habasaki, J.] Tokyo Inst Technol, Dept Innovat & Engn Mat, Yokohama, Kanagawa 2268502, Japan.
[Ngai, K. L.] USN, Res Lab, Washington, DC 20375 USA.
RP Habasaki, J (reprint author), Tokyo Inst Technol, Dept Innovat & Engn Mat, 4259 Nagatsuta Cho, Yokohama, Kanagawa 2268502, Japan.
EM habasaki@echem.titech.ac.jp
RI Habasaki, Junko/B-9283-2015
OI Habasaki, Junko/0000-0002-2887-2340
FU Office of Naval Research
FX The work performed at the Naval Research Laboratory was supported by the
Office of Naval Research.
NR 43
TC 7
Z9 7
U1 2
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD JAN 15
PY 2011
VL 357
IS 2
SI SI
BP 446
EP 453
DI 10.1016/j.jnoncrysol.2010.06.047
PG 8
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 725JK
UT WOS:000287640800036
ER
PT J
AU Pereira, PS
Calliari, LJ
Holman, R
Holland, KT
Guedes, RMC
Amorin, CK
Cavalcanti, PG
AF Pereira, P. S.
Calliari, L. J.
Holman, R.
Holland, K. T.
Guedes, R. M. C.
Amorin, C. K.
Cavalcanti, P. G.
TI Video and field observations of wave attenuation in a muddy surf zone
SO MARINE GEOLOGY
LA English
DT Article
DE wave attenuation; mud transgressed beach; remote sensing; double layer
formation
ID PATOS LAGOON; CASSINO BEACH; SEDIMENT TRANSPORT; COAST; DYNAMICS;
ENVIRONMENTS; SURINAM; SYSTEM; BRAZIL; MODEL
AB Besides the different scales within which coastal processes manifest their energy, the majority of the world's coastal regions exhibit forms of sediment heterogeneity that are physically significant. One example of a heterogeneous environment is Cassino beach, located at the southernmost part of Brazil, a fine-grain-sized sandy beach where fluid mud sporadically is transported to the nearshore and eventually onto the beach. At this site in 2005, as part of a field experiment, a video system was installed. Three years after the installation, a large mud transgression event took place in February 2008 and had 5 km of extension. In this context, the goal of the present work is to characterize the mud deposition pattern across the surf zone, describing the consequences of mud on nearshore dynamics using remote sensing techniques, beach profiles and suspended matter concentration. The surveyed beach profiles registered the deposition of fluid mud at the inner surf zone with concentrations up to 12 mg/l. The material was deposited close to the shoreline and had a cross-shore width of 100 m during the first deposition day occupying the entire water column. From surf zone time series of pixel intensity, it was possible to detect the attenuation of the surface wave spectra due to the presence of fluid mud. The combination of video techniques and field data allowed one to follow the formation of a double-layer system, where fluid mud overlays the sandy bottom. The video-based system at Cassino demonstrated that remote detection of fluid mud and quantification of its effect on the nearshore dynamics is feasible. The combination of beach profiles, measurements of suspended matter concentration and intensity timestacks allowed the analysis of the short-term evolution of the mud depositional processes. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Pereira, P. S.; Calliari, L. J.; Amorin, C. K.] Fed Univ Rio Grande, Inst Oceanog, Lab Geol Oceanog, BR-96201900 Rio Grande, RS, Brazil.
[Holman, R.] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
[Holland, K. T.] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Guedes, R. M. C.] Univ Waikato, Dept Earth & Ocean Sci, Hamilton, New Zealand.
[Cavalcanti, P. G.] Univ Fed Rio Grande do Sul, Inst Informat, Porto Alegre, RS, Brazil.
RP Pereira, PS (reprint author), Univ Fed Pernambuco, Dept Oceanog, Lab Geol Oceanog, Av Arquitetura S-N, BR-50740550 Recife, PE, Brazil.
EM praia@log.furg.br
RI Holland, K. Todd/A-7673-2011; Pereira, Pedro/A-6656-2013;
OI Holland, K. Todd/0000-0002-4601-6097; Guedes, Rafael/0000-0002-1726-1739
FU CAPES; Office of Naval Research [N00173-05-1-G26, N00173-04-1-G901,
N00014-04-1-0274, N00014-06-1-0977]
FX Special thanks to Timothy Kooney, John Stanley and Steven Spansel, who
helped the Argus station Cassy to become alive and see a mud deposition
event. We would like also to thank Neusa Pacheco and Gloria Canteiro for
their help with the suspended matter analysis, as well as Susana Vinzon
for her collaboration over all the phases of the present work. The first
author would like to express his gratitude to CAPES for the scholarship
and for the Rio Grande Pilot's Station for making wind data available
through a collaborative effort with the LocFis/FURG. This work was made
possible through grants by the Office of Naval Research
(N00173-05-1-G26, N00173-04-1-G901, N00014-04-1-0274 and
N00014-06-1-0977) administered through the ONR International Field
Office.
NR 32
TC 7
Z9 7
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0025-3227
J9 MAR GEOL
JI Mar. Geol.
PD JAN 15
PY 2011
VL 279
IS 1-4
BP 210
EP 221
DI 10.1016/j.margeo.2010.11.004
PG 12
WC Geosciences, Multidisciplinary; Oceanography
SC Geology; Oceanography
GA 717OR
UT WOS:000287057800017
ER
PT J
AU Prokopuk, N
Chafin, A
Gilardi, R
Deschamps, JR
AF Prokopuk, Nicholas
Chafin, Andrew
Gilardi, Richard
Deschamps, Jeffrey R.
TI Unsymmetric diruthenium complexes
SO INORGANICA CHIMICA ACTA
LA English
DT Article
DE Charge transfer; Electronic coupling; Ruthenium; Cyclic voltammetry; DFT
calculations
ID NONLINEAR-OPTICAL PROPERTIES; TRANSITION-METAL-COMPLEXES; EFFECTIVE CORE
POTENTIALS; MOLECULAR QUADRATIC HYPERPOLARIZABILITIES; DIPOLAR
RUTHENIUM(II) COMPLEXES; CHARGE-TRANSFER TRANSITIONS; SCHIFF-BASE
COMPLEXES; AMMINE ELECTRON-DONOR; TRANS-TETRAAMMINERUTHENIUM(II)
COMPLEXES; ELECTROABSORPTION SPECTROSCOPY
AB The new diruthenium complexes trans-[(NH3)(5)Ru(L-L)Ru(NH3)(4)(bpy-Me)](PF6)(5) (L-L are the bridging ligands pyrazine, 2a; 4,4'dipyridyl, 2b; and trans-1,2-bis(4-pyridyl)-ethylene, 2c; bpy-Me is N-methylpyridyl-pyridinium) are generated from the new complexes (L-L)Ru(NH3)(4)(bpy-Me)](PF6)(3) (1a-c) and [(NH3)(5)Ru(H2O)](PF6)(2). Cyclic voltammetry on the new compounds in acetonitrile electrolyte reveals two quasi-reversible oxidation steps corresponding to the two Ru-II/III couples in 2b and 2c and a single oxidations for 1a-c. In addition, two reduction waves are observed for the bpy-Me ligands of 1a-c and 2a-c. All of the new compounds exhibit multiple metal-to-ligand charge transfer (MLCT) bands in the visible region of the spectrum. For compounds 1a-c the most intense absorption in the visible region decreases in energy as the length of the aromatic bridging ligands increases. By contrast the strongest absorption band of 2a is lower in energy than the most intense bands of both 2b and 2c. Single crystal X-ray analysis of 2a reveals that the bridging pyridine is coplanar with the pyridyl ring of the bpy-Me ligand that is attached to the Ru center. DFT calculations on 2a indicate that the HOMO is localized predominately on the {(NH3)(5)Ru-pyz-Ru(NH3)(4)} portion of the complex and the LUMO has slightly more contribution from the bpy-Me ligand. Published by Elsevier B.V.
C1 [Prokopuk, Nicholas; Chafin, Andrew] Navair, Res Dept, China Lake, CA USA.
[Gilardi, Richard; Deschamps, Jeffrey R.] USN, Res Lab, Washington, DC 20375 USA.
RP Prokopuk, N (reprint author), Navair, Res Dept, China Lake, CA USA.
EM nicholas.prokopuk@navy.mil
OI Deschamps, Jeffrey/0000-0001-5845-0010
FU Office of Naval Research
FX This research was funded by the Navair In House Laboratory Independent
Research Program sponsored by the Office of Naval Research.
NR 48
TC 0
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U1 0
U2 2
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0020-1693
J9 INORG CHIM ACTA
JI Inorg. Chim. Acta
PD JAN 15
PY 2011
VL 365
IS 1
BP 439
EP 446
DI 10.1016/j.ica.2010.09.059
PG 8
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 698WF
UT WOS:000285624200064
ER
PT J
AU Gutteridge, CE
Hoffman, MM
Bhattacharjee, AK
Milhous, WK
Gerena, L
AF Gutteridge, Clare E.
Hoffman, Marshall M.
Bhattacharjee, Apurba K.
Milhous, Wilbur K.
Gerena, Lucia
TI In vitro efficacy of 7-benzylamino-1-isoquinolinamines against
Plasmodium falciparum related to the efficacy of chalcones
SO BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
LA English
DT Article
DE Plasmodium; Malaria; In vitro efficacy; Quinolinamine; Chalcone
ID ANTIMALARIAL ACTIVITY; MALARIA; DERIVATIVES; LICOCHALCONE; ANTAGONISTS;
AGENTS; DRUGS; MODEL; VIVO
AB A series of 1,7-diaminoisoquinolinamines, that are expected to mediate antimalarial activity by the same mechanism employed by the chalcones, were produced. Six 7-benzylamino-1-isoquinolinamines were found to be submicromolar inhibitors in vitro of drug-resistant Plasmodium falciparum, with the best possessing activity comparable to chloroquine. Despite being developed from a lead that is a DHFR inhibitor, these compounds do not mediate their antimalarial effects by inhibition of DHFR. Published by Elsevier Ltd.
C1 [Gutteridge, Clare E.; Hoffman, Marshall M.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
[Bhattacharjee, Apurba K.; Milhous, Wilbur K.; Gerena, Lucia] Walter Reed Army Inst Res, Div Expt Therapeut, Silver Spring, MD 20910 USA.
RP Gutteridge, CE (reprint author), USN Acad, Dept Chem, Annapolis, MD 21402 USA.
EM gutterid@usna.edu
FU Military Infectious Diseases Research Program; Office of Naval Research;
United States Naval Academy; Naval Academy Research Council
FX We are grateful for support of this work by the Military Infectious
Diseases Research Program; the Office of Naval Research; and the United
States Naval Academy, including from the Naval Academy Research Council.
Research was conducted in compliance with the U.S. Animal Welfare Act
and other federal statutes and regulations relating to animals and
experiments involving animals and adheres to principles stated in the
Guide for the Care and Use of Laboratory Animals, NRC Publication, 1996
edition. Material has been reviewed by the Walter Reed Army Institute of
Research. There is no objection to its publication. The opinions or
assertions contained herein are the private views of the authors and are
not to be construed as official, or reflecting true views of the
Department of the Army or the Department of Defense.
NR 26
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U1 0
U2 1
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0960-894X
J9 BIOORG MED CHEM LETT
JI Bioorg. Med. Chem. Lett.
PD JAN 15
PY 2011
VL 21
IS 2
BP 786
EP 789
DI 10.1016/j.bmcl.2010.11.099
PG 4
WC Chemistry, Medicinal; Chemistry, Organic
SC Pharmacology & Pharmacy; Chemistry
GA 703RC
UT WOS:000285998000037
PM 21168330
ER
PT J
AU Ruocco, G
Ngai, KL
AF Ruocco, Giancarlo
Ngai, K. L.
TI 6th International discussion meeting on relaxations in complex systems
New results, directions and opportunities August 30th-September 5th
2009, Rome, Italy Preface
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Editorial Material
C1 [Ruocco, Giancarlo] Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy.
[Ngai, K. L.] NRL, Washington, DC USA.
[Ngai, K. L.] Univ Pisa, Polylab, Pisa, Italy.
RP Ruocco, G (reprint author), Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy.
RI Ruocco, Giancarlo/A-6245-2010
OI Ruocco, Giancarlo/0000-0002-2762-9533
NR 0
TC 2
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U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD JAN 15
PY 2011
VL 357
IS 2
SI SI
BP 241
EP 242
DI 10.1016/j.jnoncrysol.2010.08.022
PG 2
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 725JK
UT WOS:000287640800001
ER
PT J
AU Casalini, R
Roland, CM
AF Casalini, R.
Roland, C. M.
TI Aging of a low molecular weight poly(methyl methacrylate)
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article
DE Dielectric relaxation; Glass transition; Poly(methylmethacrylate)
ID DIELECTRIC-RELAXATION; TRANSLATIONAL DIFFUSION; GLASS-TRANSITION;
DYNAMICS; LIQUIDS; ALPHA; TEMPERATURE
AB Dielectric relaxation of a low molecular weight PMMA was measured in both the equilibrium and glassy states. The intense beta process, due to motion of the pendant ester moiety, exhibits a change in T-dependence of both its relaxation time and dielectric strength at T(g), reflecting the coupling of this high frequency process to the backbone conformational changes underlying the a dynamics. Consequently, we can exploit the change in the properties of the beta process during physical aging to quantify the alpha relaxation time and its T-dependence for glassy PMMA. The obtained values, T(alpha)>10(4), are too long for direct measurement. Published by Elsevier B.V.
C1 [Casalini, R.; Roland, C. M.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
RP Casalini, R (reprint author), USN, Res Lab, Div Chem, Code 6120, Washington, DC 20375 USA.
EM casalini@ccs.nrl.navy.mil
FU Office of Naval Research
FX The authors acknowledge support of the Office of Naval Research.
NR 19
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U1 2
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD JAN 15
PY 2011
VL 357
IS 2
SI SI
BP 282
EP 285
DI 10.1016/j.jnoncrysol.2010.07.048
PG 4
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 725JK
UT WOS:000287640800009
ER
PT J
AU Bendier, JT
Fontanella, JJ
Shlesinger, MF
Wintersgill, MC
AF Bendier, J. T.
Fontanella, J. J.
Shlesinger, M. F.
Wintersgill, M. C.
TI The defect diffusion model, scaling, E*(V)/H* and monomer volume and
correlation lengths for glass-formers
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article
DE Dielectric relaxation; High pressure; Scaling; Correlation length
ID FORMING LIQUIDS; DYNAMIC HETEROGENEITIES; HYDROSTATIC-PRESSURE;
TRANSITION DYNAMICS; D-SORBITOL; RELAXATION; TEMPERATURE; DEPENDENCE;
FRAGILITY; VISCOSITY
AB Four topics are treated within the framework of the defect diffusion model (DDM). First, it is shown how the relationship between E*(V)/H*. (ratio of the apparent isochoric activation energy to the isobaric activation enthalpy) and monomer volume for polymers that has been pointed out by Floudas and co-workers [G. Floudas, K. Mpoukouvalas and P. Papadopoulos, J. Chem. Phys. 124 (2006) 074905] is predicted. Next, it is shown that in the DDM, scaling arises because the critical temperature can be represented approximately by a power law. Consequently, in the DDM scaling is always approximate and significant departures from scaling, as is observed in the case of hydrogen bonded materials for example, are matters of degree. It is also shown how the connection of scaling with E*(V)/H*. is a natural consequence of the DDM. Finally, DDM calculations of the defect correlation length are carried out and compared with experimental dynamical correlation lengths measured using the 4D3CP solid state NMR method. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Fontanella, J. J.; Shlesinger, M. F.; Wintersgill, M. C.] USN Acad, Dept Phys, Annapolis, MD 21402 USA.
[Bendier, J. T.] BSC Inc, Rapid City, SD 57702 USA.
[Shlesinger, M. F.] Off Naval Res, Arlington, VA 22203 USA.
RP Fontanella, JJ (reprint author), USN Acad, Dept Phys, Annapolis, MD 21402 USA.
EM jbendler@usna.edu; jjf@usna.edu; shlesing@usna.edu; mwinter@usna.edu
FU U.S. Office of Naval Research; Department of Defense-Army Research
Office [DAAD19-01-1-0482]
FX This work was supported in part by the U.S. Office of Naval Research.
JTB gratefully acknowledges financial support by the Department of
Defense-Army Research Office (grant no. DAAD19-01-1-0482). MFS would
like to thank the Kinnear Chair of Physics for support.
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U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD JAN 15
PY 2011
VL 357
IS 2
SI SI
BP 404
EP 410
DI 10.1016/j.jnoncrysol.2010.07.031
PG 7
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 725JK
UT WOS:000287640800029
ER
PT J
AU Capaccioli, S
Ngai, KL
Ancherbak, S
Rolla, PA
Shinyashiki, N
AF Capaccioli, S.
Ngai, K. L.
Ancherbak, S.
Rolla, P. A.
Shinyashiki, N.
TI The role of primitive relaxation in the dynamics of aqueous mixtures,
nano-confined water and hydrated proteins
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article
DE Relaxation; Water; Aqueous mixtures; Glass transition; Hydrated proteins
ID INELASTIC NEUTRON-SCATTERING; GOLDSTEIN BETA-RELAXATION; GLASS LIQUID
TRANSITION; BOVINE SERUM-ALBUMIN; DIELECTRIC-RELAXATION; SECONDARY
RELAXATIONS; SUPERCOOLED WATER; TEMPERATURE-DEPENDENCE;
MOLECULAR-DYNAMICS; ALPHA-RELAXATION
AB The relaxation scenario in aqueous systems, such as mixtures of water with hydrophilic solutes, nano-confined water and hydrated biomolecules, has been shown to exhibit general features, in spite of the huge differences in structure, chemical composition and complexity. Dynamics, in all these systems, invariably shows at least two relaxations: (i) a slower process, related to cooperative and structural motions of water and solute molecules (in the case of mixtures) or related to interfacial processes in the case of confined water and (ii) a faster process, with non-cooperative character originating from water. The latter has properties including timescale and temperature dependence similar or related in all the aqueous systems. This water-specific relaxation can be identified as the primitive relaxation, or the Johari-Goldstein beta-relaxation. The primitive process is the precursor of the many-body relaxation process which increases in length-scale with time until the terminal a-relaxation is reached.
Using new experimental data (at atmospheric and high pressure) along with a revision of most of the recent literature on the dynamics of confined water and aqueous mixtures, we show that the two abovementioned relaxation processes are inter-related as evidenced by correlations in their properties. For instance, both relaxation time and dielectric strength of the water-specific relaxation exhibit a crossover from a stronger to a weaker dependence with decreasing T, at the temperature where the slow process attains a very long timescale (>1 ks) and becomes structurally arrested, exactly analogous to that found for beta-relaxation in van der Waals liquids. Moreover, the primitive relaxation of water is shown to play a pivotal role in determining the dynamics of hydrated biomolecules in general, including the "dynamic transition" observed by neutron scattering and Mossbauer spectroscopy. We show that the primitive relaxation of the solvent is responsible for the dynamic transition, even in the case that the solvent is not pure water or an aqueous mixture. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Capaccioli, S.; Ancherbak, S.; Rolla, P. A.] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy.
[Capaccioli, S.; Ancherbak, S.; Rolla, P. A.] CNR IPCF, I-56127 Pisa, Italy.
[Ngai, K. L.] USN, Res Lab, Washington, DC 20375 USA.
[Shinyashiki, N.] Tokai Univ, Dept Phys, Kanagawa 2591292, Japan.
RP Capaccioli, S (reprint author), Univ Pisa, Dipartimento Fis, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy.
EM capacci@df.unipi.it
RI Capaccioli, Simone/A-8503-2012;
OI Capaccioli, Simone/0000-0003-4866-8918; Shinyashiki,
Naoki/0000-0003-0486-2911
FU NRL by the Office of Naval Research; Galilei Ph.D. School
FX The work was supported at NRL by the Office of Naval Research. S.A.
acknowledges the support of Galilei Ph.D. School.
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U2 21
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
EI 1873-4812
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD JAN 15
PY 2011
VL 357
IS 2
SI SI
BP 641
EP 654
DI 10.1016/j.jnoncrysol.2010.07.054
PG 14
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 725JK
UT WOS:000287640800071
ER
PT J
AU Urban, S
Roland, CM
AF Urban, Stanislaw
Roland, C. Michael
TI Low frequency relaxation in liquid crystals in relation to structural
relaxation in glass-formers
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article
DE Liquid crystals; Glass-formers; Molecular dynamic; High pressure
ID ISOTHIOCYANATO-BIPHENYL 8BT; THERMAL-ANALYSIS DTA; HIGH-PRESSURE;
ORIENTATIONAL ORDER; SUPERCOOLED LIQUIDS; ELEVATED PRESSURES; PVT
MEASUREMENTS; DIELECTRIC-RELAXATION; MOLECULAR-DYNAMICS; SMECTIC-A
AB Liquid crystals (LC) are the state of matter intermediate between isotropic liquids and the crystalline state. LC-forming molecules have strongly anisotropic shapes (rod-like in most cases). This leads to an interaction potential that consists of distance-dependent and orientation-dependent parts. Rotational dynamics of LC molecules falls into two frequency regions. Rotations about the short axes are strongly hindered by the potential barrier and thus coupled to fluctuations of the molecular centers of mass. This in turn causes these longitudinal or "flip-flop" motions, characterized by a relatively large relaxation time T-parallel to, to exhibit considerable temperature, pressure and volume dependences. Experimental relaxation times determined to date for various LC phases (nematic, smectic A. C, and E) for different thermodynamic conditions (isobaric, isothermal and isochoric) are discussed herein, adopting the formulae applied for characterization of the structural relaxation times of glass-formers (GF). This analysis appears fruitful: in particular. the strength parameter characterizing the steepness of the interaction potential can be determined from the relaxation times, and T-parallel to is independent of temperature and pressure along the nematic-isotropic transition line, similar to the behavior of the structural relaxation time along certain transitions in GFs. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Urban, Stanislaw] Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland.
[Roland, C. Michael] USN, Res Lab, Washington, DC 20375 USA.
RP Urban, S (reprint author), Jagiellonian Univ, Inst Phys, Reymonta 4, PL-30059 Krakow, Poland.
EM ufurban@cyf-kr.edu.pl; roland@nrl.navy.mil
FU Office of Naval Research
FX The work at NRL was supported by the Office of Naval Research.
NR 64
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U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD JAN 15
PY 2011
VL 357
IS 2
SI SI
BP 740
EP 745
DI 10.1016/j.jnoncrysol.2010.05.093
PG 6
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 725JK
UT WOS:000287640800087
ER
PT J
AU Reeder, DB
Ma, BB
Yang, YJ
AF Reeder, D. Benjamin
Ma, Barry B.
Yang, Yiing Jang
TI Very large subaqueous sand dunes on the upper continental slope in the
South China Sea generated by episodic, shoaling deep-water internal
solitary waves
SO MARINE GEOLOGY
LA English
DT Article
DE sediment waves; sand dunes; bedforms; internal solitary waves; South
China Sea
ID SEDIMENT WAVES; GLOBAL INSTABILITY; NEPHELOID LAYERS; LARGE-SCALE;
RUN-UP; TRANSPORT; SHELF; SOLITONS; BOTTOM; RESUSPENSION
AB Very large subaqueous sand dunes were discovered on the upper continental slope of the northern South China Sea. The dunes were observed along a single 40 km long transect southeast of 21.93 degrees N, 117.53 degrees E on the upper continental slope in water depths of 160 m to 600 m. The sand dunes are composed of fine to medium sand, with amplitudes exceeding 16 m and crest-to-crest wavelengths exceeding 350 m. The dunes' apparent formation mechanism is the world's largest observed internal solitary waves which generate from tidal forcing on the Luzon Ridge on the east side of the South China Sea, propagate west across the deep basin with amplitudes regularly exceeding 100 m, and dissipate extremely large amounts of energy via turbulent interaction with the continental slope, suspending and redistributing the bottom sediment. While subaqueous dunes are found in many locations throughout the world's oceans and coastal zones, these particular dunes appear to be unique for two principal reasons: their location on the upper continental slope (away from the influence of shallow-water tidal forcing, deep basin bottom currents and topographically-amplified canyon flows), and their distinctive formation mechanism (approximately 60 episodic, extremely energetic, large amplitude events each lunar cycle). Published by Elsevier B.V.
C1 [Reeder, D. Benjamin] USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
[Ma, Barry B.] Univ Washington, Appl Phys Lab, Seattle, WA 98105 USA.
[Yang, Yiing Jang] Naval Acad, Dept Marine Sci, Kaohsiung 813, Taiwan.
RP Reeder, DB (reprint author), USN, Postgrad Sch, Dept Oceanog, 833 Dyer Rd, Monterey, CA 93943 USA.
EM dbreeder@nps.edu; barry@apl.washington.edu; yjyang@cna.edu.tw
OI Yang, Yiing-Jang/0000-0002-6637-9311
FU National Science Council of Taiwan; Office of Naval Research
FX The skill and enthusiasm of the officers and crew of the R/V Ocean
Researcher I are gratefully acknowledged. We thank Dr. J. Y. Lou for
analyzing the sediment samples, and the reviewers for their very
thoughtful and helpful comments. Funding was provided by the National
Science Council of Taiwan and the Office of Naval Research.
NR 71
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U2 27
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0025-3227
EI 1872-6151
J9 MAR GEOL
JI Mar. Geol.
PD JAN 15
PY 2011
VL 279
IS 1-4
BP 12
EP 18
DI 10.1016/j.margeo.2010.10.009
PG 7
WC Geosciences, Multidisciplinary; Oceanography
SC Geology; Oceanography
GA 717OR
UT WOS:000287057800002
ER
PT J
AU Kopp, G
Lean, JL
AF Kopp, Greg
Lean, Judith L.
TI A new, lower value of total solar irradiance: Evidence and climate
significance
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID MONITOR TIM; VARIABILITY; TREND
AB The most accurate value of total solar irradiance during the 2008 solar minimum period is 1360.8 +/- 0.5 W m(-2) according to measurements from the Total Irradiance Monitor (TIM) on NASA's Solar Radiation and Climate Experiment (SORCE) and a series of new radiometric laboratory tests. This value is significantly lower than the canonical value of 1365.4 +/- 1.3 W m(-2) established in the 1990s, which energy balance calculations and climate models currently use. Scattered light is a primary cause of the higher irradiance values measured by the earlier generation of solar radiometers in which the precision aperture defining the measured solar beam is located behind a larger, view-limiting aperture. In the TIM, the opposite order of these apertures precludes this spurious signal by limiting the light entering the instrument. We assess the accuracy and stability of irradiance measurements made since 1978 and the implications of instrument uncertainties and instabilities for climate research in comparison with the new TIM data. TIM's lower solar irradiance value is not a change in the Sun's output, whose variations it detects with stability comparable or superior to prior measurements; instead, its significance is in advancing the capability of monitoring solar irradiance variations on climate-relevant time scales and in improving estimates of Earth energy balance, which the Sun initiates. Citation: Kopp, G., and J. L. Lean (2011), A new, lower value of total solar irradiance: Evidence and climate significance, Geophys. Res. Lett., 38, L01706, doi:10.1029/2010GL045777.
C1 [Kopp, Greg] Lab Atmospher & Space Phys, Boulder, CO 80303 USA.
[Lean, Judith L.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
RP Kopp, G (reprint author), Lab Atmospher & Space Phys, 1234 Innovat Dr, Boulder, CO 80303 USA.
EM greg.kopp@lasp.colorado.edu
OI Lean, Judith/0000-0002-0087-9639
FU NASA Earth Sciences
FX NASA Earth Sciences supported this work under the SORCE and Glory
programs. Discussions with the SORCE and Glory TIM teams and with David
Rind are gratefully acknowledged, as are thoughtful comments from Peter
Pilewskie's, Wolfgang Finsterle's, and an unidentified reviewer's
careful reading of the paper.
NR 24
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PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD JAN 14
PY 2011
VL 38
AR L01706
DI 10.1029/2010GL045777
PG 7
WC Geosciences, Multidisciplinary
SC Geology
GA 707XG
UT WOS:000286323900002
ER
PT J
AU Rozycki, B
Kim, YC
Hummer, G
AF Rozycki, Bartosz
Kim, Young C.
Hummer, Gerhard
TI SAXS Ensemble Refinement of ESCRT-III CHMP3 Conformational Transitions
SO STRUCTURE
LA English
DT Article
ID X-RAY-SCATTERING; SMALL-ANGLE SCATTERING; STRUCTURAL BASIS; BIOLOGICAL
MACROMOLECULES; PROTEIN; COMPLEXES; DOMAIN; AUTOINHIBITION; BINDING; NMR
AB We developed and implemented an ensemble-refinement method to study dynamic biomolecular assemblies with intrinsically disordered segments. Data from small angle X-ray scattering (SAXS) experiments and from coarse-grained molecular simulations were combined by using a maximum-entropy approach. The method was applied to CHMP3 of ESCRT-III, a protein with multiple helical domains separated by flexible linkers. Based on recent SAXS data by Lata et al. (J. Mol. Biol. 378, 818, 2008), we constructed ensembles of CHMP3 at low- and high-salt concentration to characterize its closed autoinhibited state and open active state. At low salt, helix alpha(5) is bound to the tip of helices alpha(1) and alpha(2), in excellent agreement with a recent crystal structure. Helix alpha(6) remains free in solution and does not appear to be part of the autoinhibitory complex. The simulation-based ensemble refinement is general and effectively increases the resolution of SAXS beyond shape information to atomically detailed structures.
C1 [Rozycki, Bartosz; Hummer, Gerhard] NIDDKD, Chem Phys Lab, NIH, Bethesda, MD 20892 USA.
[Kim, Young C.] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RP Hummer, G (reprint author), NIDDKD, Chem Phys Lab, NIH, Bldg 2, Bethesda, MD 20892 USA.
EM hummer@helix.nih.gov
RI Rozycki, Bartosz/B-7005-2009; Hummer, Gerhard/A-2546-2013
OI Rozycki, Bartosz/0000-0001-5938-7308; Hummer,
Gerhard/0000-0001-7768-746X
FU NIH, NIDDK; European Community
FX We thank Dr. James Hurley and Dr. Alexander Grishaev for many helpful
discussions. This work used the Biowulf computing cluster at the NIH.
The research was supported by the Intramural Research Program of the
NIH, NIDDK, and by a Marie Curie International Outgoing Fellowship
within the 7th European Community Framework Programme (to B.R.).
NR 47
TC 94
Z9 95
U1 3
U2 34
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0969-2126
J9 STRUCTURE
JI Structure
PD JAN 12
PY 2011
VL 19
IS 1
BP 109
EP 116
DI 10.1016/j.str.2010.10.006
PG 8
WC Biochemistry & Molecular Biology; Biophysics; Cell Biology
SC Biochemistry & Molecular Biology; Biophysics; Cell Biology
GA 708FP
UT WOS:000286348000014
PM 21220121
ER
PT J
AU Buchanan, JL
Gilbert, RP
Ou, MJY
AF Buchanan, James L.
Gilbert, Robert P.
Ou, Miao-jung Y.
TI Wavelet decomposition of transmitted ultrasound wave through a 1-D
muscle-bone system
SO JOURNAL OF BIOMECHANICS
LA English
DT Article
DE Ultrasound; Muscle-cortical-cancellous bone; Biot-Johnson-Koplik-Dashen
model; Transfer functions; Travel-time exponentials decomposition
ID CANCELLOUS BONE; FREQUENCY RANGE; ELASTIC WAVES; POROUS-MEDIA;
PROPAGATION
AB In the attempt for using ultrasound as a diagnostic device for osteoporosis, several authors have described the result of the in vitro experiment in which ultrasound is passed through a cancellous bone specimen placed in a water tank. However, in the in vivo setting, a patient's cancellous bone is surrounded by cortical and muscle layers. This paper considers in the one-dimensional case (1) what effect the cortical bone segments surrounding the cancellous segment would have on the received signal and (2) what the received signal would be when a source and receiver are placed on opposite sides of a structure consisting of a cancellous segment surrounded by cortical and muscle layers. Mathematically this is accomplished by representing the received signal as a sum of wavelets which go through different reflection-transmission histories at the muscle-cortical bone and cortical-cancellous bone interfaces. The muscle and cortical bone are modeled as elastic materials and the cancellous bone as a poroelastic material described by the Biot-Johnson-Koplik-Dashen model. The approach presented here permits the assessment of which possible paths of transmission and reflection through the cortical-cancellous or muscle-cortical-cancellous complex will result in significant contributions to the received waveform. This piece of information can be useful for solving the inverse problem of non-destructive assessment of material properties of bone. Our methodology can be generalized to three-dimensional parallelly layered structure by first applying Fourier transform in the directions perpendicular to the transverse direction. (C) 2010 Elsevier Ltd. All rights reserved.
C1 [Ou, Miao-jung Y.] Oak Ridge Natl Lab, Joint Inst Computat Sci, Oak Ridge, TN 37831 USA.
[Gilbert, Robert P.] Univ Delaware, Dept Math Sci, Newark, DE 19711 USA.
[Buchanan, James L.] USN Acad, Dept Math, Annapolis, MD 21402 USA.
RP Ou, MJY (reprint author), Oak Ridge Natl Lab, Joint Inst Computat Sci, Oak Ridge, TN 37831 USA.
EM mou@utk.edu
NR 10
TC 4
Z9 4
U1 0
U2 3
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0021-9290
J9 J BIOMECH
JI J. Biomech.
PD JAN 11
PY 2011
VL 44
IS 2
SI SI
BP 352
EP 358
DI 10.1016/j.jbiomech.2010.10.030
PG 7
WC Biophysics; Engineering, Biomedical
SC Biophysics; Engineering
GA 722WP
UT WOS:000287466300021
PM 21092969
ER
PT J
AU Frajtag, P
El-Masry, NA
Nepal, N
Bedair, SM
AF Frajtag, P.
El-Masry, N. A.
Nepal, N.
Bedair, S. M.
TI Embedded voids approach for low defect density in epitaxial GaN films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID DISLOCATION DENSITY; LAYERS
AB We have developed a technique for defect reduction in GaN epitaxial films grown on sapphire substrates. This technique relies on the generation of high densities of embedded microvoids (similar to 10(8)/cm(2)), a few microns long and less than a micron in diameter. These voids are located near the sapphire substrate, where high densities of dislocations are present. Network of embedded voids offer free surfaces that act as dislocation sinks or termination sites for the dislocations generated at the GaN/sapphire interface. Both transmission electron and atomic force microscopy results confirm the uniform reduction of the dislocation density by two orders of magnitude. (c) 2011 American Institute of Physics. [doi:10.1063/1.3540680]
C1 [Nepal, N.; Bedair, S. M.] N Carolina State Univ, Dept Elect & Comp Engn, Raleigh, NC 27695 USA.
[Frajtag, P.; El-Masry, N. A.] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA.
[Nepal, N.] USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
RP Bedair, SM (reprint author), N Carolina State Univ, Dept Elect & Comp Engn, Raleigh, NC 27695 USA.
EM bedair@ncsu.edu
FU Army Research Office
FX The authors would like to thank K.C. Wong, C.B. Mooney and A.M. Hosalli
for their technical assistances. This work is partially supported by the
Army Research Office.
NR 9
TC 12
Z9 12
U1 1
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 10
PY 2011
VL 98
IS 2
AR 023115
DI 10.1063/1.3540680
PG 3
WC Physics, Applied
SC Physics
GA 709VZ
UT WOS:000286470800064
ER
PT J
AU Deen, DA
Storm, DF
Bass, R
Meyer, DJ
Katzer, DS
Binari, SC
Lacis, JW
Gougousi, T
AF Deen, D. A.
Storm, D. F.
Bass, R.
Meyer, D. J.
Katzer, D. S.
Binari, S. C.
Lacis, J. W.
Gougousi, T.
TI Atomic layer deposited Ta2O5 gate insulation for enhancing breakdown
voltage of AlN/GaN high electron mobility transistors
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID MOLECULAR-BEAM EPITAXY; HETEROSTRUCTURES; GROWTH
AB AlN/GaN heterostructures with a 3.5 nm AlN cap have been grown by molecular beam epitaxy followed by a 6 nm thick atomic layer deposited Ta2O5 film. Transistors fabricated with 150 nm length gates showed drain current density of 1.37 A/mm, transconductance of 315 mS/mm, and sustained drain-source biases up to 96 V while in the off-state before destructive breakdown as a result of the Ta2O5 gate insulator. Terman's method has been modified for the multijunction capacitor and allowed the measurement of interface state density (similar to 10(13) cm(-2) eV(-1)). Small-signal frequency performance of 75 and 115 GHz was obtained for f(t) and f(max), respectively. (C) 2011 American Institute of Physics. [doi:10.1063/1.3531551]
C1 [Deen, D. A.; Storm, D. F.; Bass, R.; Meyer, D. J.; Katzer, D. S.; Binari, S. C.] USN, Div Elect Sci & Technol, Res Lab, Washington, DC 20375 USA.
[Lacis, J. W.; Gougousi, T.] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
RP Deen, DA (reprint author), USN, Div Elect Sci & Technol, Res Lab, Washington, DC 20375 USA.
EM david.deen@nrl.navy.mil
RI Katzer, D. Scott/N-7841-2013; Gougousi, Theodosia/C-8156-2014
FU Office of Naval Research; NSF [DMR 0846445]
FX The authors acknowledge N. Green for his assistance with processing. D.
A. Deen thanks J. G. Champlain and M. G. Ancona for technical
discussions. This work was supported by the Office of Naval Research.
The Ta2O5 ALD work at UMBC was supported in part
by NSF (Grant No. DMR 0846445).
NR 18
TC 15
Z9 15
U1 1
U2 16
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 10
PY 2011
VL 98
IS 2
AR 023506
DI 10.1063/1.3531551
PG 3
WC Physics, Applied
SC Physics
GA 709VZ
UT WOS:000286470800077
ER
PT J
AU Ackermann, M
Ajello, M
Baldini, L
Ballet, J
Barbiellini, G
Bastieri, D
Bechtol, K
Bellazzini, R
Berenji, B
Bloom, ED
Bonamente, E
Borgland, AW
Brandt, TJ
Bregeon, J
Brez, A
Brigida, M
Bruel, P
Buehler, R
Buson, S
Caliandro, GA
Cameron, RA
Caraveo, PA
Casandjian, JM
Cecchi, C
Charles, E
Chekhtman, A
Chiang, J
Ciprini, S
Claus, R
Cohen-Tanugi, J
Conrad, J
Dermer, CD
de Palma, F
Digel, SW
Drell, PS
Dubois, R
Favuzzi, C
Ferrara, EC
Focke, WB
Fukazawa, Y
Funk, S
Fusco, P
Gargano, F
Germani, S
Giglietto, N
Giordano, F
Giroletti, M
Glanzman, T
Godfrey, G
Grenier, IA
Guiriec, S
Hadasch, D
Hanabata, Y
Harding, AK
Hayashi, K
Hayashida, M
Hughes, RE
Itoh, R
Johannesson, G
Johnson, AS
Johnson, WN
Kamae, T
Katagiri, H
Kataoka, J
Knodlseder, J
Kuss, M
Lande, J
Latronico, L
Lee, SH
Garde, ML
Longo, F
Loparco, F
Lovellette, MN
Lubrano, P
Makeev, A
Martin, P
Mazziotta, MN
McEnery, JE
Mehault, J
Michelson, PF
Mizuno, T
Monte, C
Monzani, ME
Morselli, A
Moskalenko, IV
Murgia, S
Naumann-Godo, M
Nishino, S
Nolan, PL
Norris, JP
Nuss, E
Ohsugi, T
Okumura, A
Omodei, N
Orlando, E
Ormes, JF
Ozaki, M
Parent, D
Pelassa, V
Pepe, M
Pesce-Rollins, M
Piron, F
Porter, TA
Raino, S
Rando, R
Razzano, M
Reimer, A
Reimer, O
Ripken, J
Sada, T
Sadrozinski, HFW
Sgro, C
Siskind, EJ
Spandre, G
Spinelli, P
Strickman, MS
Strong, AW
Suson, DJ
Takahashi, H
Takahashi, T
Tanaka, T
Thayer, JB
Thompson, DJ
Tibaldo, L
Torres, DF
Tramacere, A
Uchiyama, Y
Uehara, T
Usher, TL
Vandenbroucke, J
Vasileiou, V
Vilchez, N
Vitale, V
Vladimirov, AE
Waite, AP
Wang, P
Wood, KS
Yang, Z
Ziegler, M
AF Ackermann, M.
Ajello, M.
Baldini, L.
Ballet, J.
Barbiellini, G.
Bastieri, D.
Bechtol, K.
Bellazzini, R.
Berenji, B.
Bloom, E. D.
Bonamente, E.
Borgland, A. W.
Brandt, T. J.
Bregeon, J.
Brez, A.
Brigida, M.
Bruel, P.
Buehler, R.
Buson, S.
Caliandro, G. A.
Cameron, R. A.
Caraveo, P. A.
Casandjian, J. M.
Cecchi, C.
Charles, E.
Chekhtman, A.
Chiang, J.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Conrad, J.
Dermer, C. D.
de Palma, F.
Digel, S. W.
Drell, P. S.
Dubois, R.
Favuzzi, C.
Ferrara, E. C.
Focke, W. B.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Germani, S.
Giglietto, N.
Giordano, F.
Giroletti, M.
Glanzman, T.
Godfrey, G.
Grenier, I. A.
Guiriec, S.
Hadasch, D.
Hanabata, Y.
Harding, A. K.
Hayashi, K.
Hayashida, M.
Hughes, R. E.
Itoh, R.
Johannesson, G.
Johnson, A. S.
Johnson, W. N.
Kamae, T.
Katagiri, H.
Kataoka, J.
Knoedlseder, J.
Kuss, M.
Lande, J.
Latronico, L.
Lee, S. -H.
Garde, M. Llena
Longo, F.
Loparco, F.
Lovellette, M. N.
Lubrano, P.
Makeev, A.
Martin, P.
Mazziotta, M. N.
McEnery, J. E.
Mehault, J.
Michelson, P. F.
Mizuno, T.
Monte, C.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Murgia, S.
Naumann-Godo, M.
Nishino, S.
Nolan, P. L.
Norris, J. P.
Nuss, E.
Ohsugi, T.
Okumura, A.
Omodei, N.
Orlando, E.
Ormes, J. F.
Ozaki, M.
Parent, D.
Pelassa, V.
Pepe, M.
Pesce-Rollins, M.
Piron, F.
Porter, T. A.
Raino, S.
Rando, R.
Razzano, M.
Reimer, A.
Reimer, O.
Ripken, J.
Sada, T.
Sadrozinski, H. F. -W.
Sgro, C.
Siskind, E. J.
Spandre, G.
Spinelli, P.
Strickman, M. S.
Strong, A. W.
Suson, D. J.
Takahashi, H.
Takahashi, T.
Tanaka, T.
Thayer, J. B.
Thompson, D. J.
Tibaldo, L.
Torres, D. F.
Tramacere, A.
Uchiyama, Y.
Uehara, T.
Usher, T. L.
Vandenbroucke, J.
Vasileiou, V.
Vilchez, N.
Vitale, V.
Vladimirov, A. E.
Waite, A. P.
Wang, P.
Wood, K. S.
Yang, Z.
Ziegler, M.
TI CONSTRAINTS ON THE COSMIC-RAY DENSITY GRADIENT BEYOND THE SOLAR CIRCLE
FROM FERMI gamma-RAY OBSERVATIONS OF THE THIRD GALACTIC QUADRANT
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmic rays; gamma rays: ISM; ISM: general
ID LARGE-AREA TELESCOPE; RADIAL-DISTRIBUTION; MOLECULAR CLOUDS; MILKY-WAY;
CO SURVEY; EGRET OBSERVATIONS; OUTER GALAXY; EMISSION; MONOCEROS; GAS
AB We report an analysis of the interstellar gamma-ray emission in the third Galactic quadrant measured by the Fermi Large Area Telescope. The window encompassing the Galactic plane from longitude 210 degrees to 250 degrees has kinematically well-defined segments of the Local and the Perseus arms, suitable to study the cosmic-ray (CR) densities across the outer Galaxy. We measure no large gradient with Galactocentric distance of the gamma-ray emissivities per interstellar H atom over the regions sampled in this study. The gradient depends, however, on the optical depth correction applied to derive the H I column densities. No significant variations are found in the interstellar spectra in the outer Galaxy, indicating similar shapes of the CR spectrum up to the Perseus arm for particles with GeV to tens of GeV energies. The emissivity as a function of Galactocentric radius does not show a large enhancement in the spiral arms with respect to the interarm region. The measured emissivity gradient is flatter than expectations based on a CR propagation model using the radial distribution of supernova remnants and uniform diffusion properties. In this context, observations require a larger halo size and/or a flatter CR source distribution than usually assumed. The molecular mass calibrating ratio, X-CO = N(H-2)/W-CO, is found to be (2.08 +/- 0.11) x 10(20) cm(-2)(K km s(-1))(-1) in the Local arm clouds and is not significantly sensitive to the choice of Hi spin temperature. No significant variations are found for clouds in the interarm region.
C1 [Ackermann, M.; Ajello, M.; Bechtol, K.; Berenji, B.; Bloom, E. D.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Digel, S. W.; Drell, P. S.; Dubois, R.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johannesson, G.; Johnson, A. S.; Kamae, T.; Lande, J.; Lee, S. -H.; Michelson, P. F.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Omodei, N.; Porter, T. A.; Reimer, A.; Reimer, O.; Tanaka, T.; Thayer, J. B.; Tramacere, A.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vladimirov, A. E.; Waite, A. P.; Wang, P.] Stanford Univ, Dept Phys, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA.
[Ackermann, M.; Ajello, M.; Bechtol, K.; Berenji, B.; Bloom, E. D.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Digel, S. W.; Drell, P. S.; Dubois, R.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johannesson, G.; Johnson, A. S.; Kamae, T.; Lande, J.; Lee, S. -H.; Michelson, P. F.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Omodei, N.; Porter, T. A.; Reimer, A.; Reimer, O.; Tanaka, T.; Thayer, J. B.; Tramacere, A.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vladimirov, A. E.; Waite, A. P.; Wang, P.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[Baldini, L.; Bellazzini, R.; Bregeon, J.; Brez, A.; Kuss, M.; Latronico, L.; Pesce-Rollins, M.; Razzano, M.; Sgro, C.; Spandre, G.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Ballet, J.; Casandjian, J. M.; Grenier, I. A.; Naumann-Godo, M.; Tibaldo, L.] Univ Paris Diderot, Lab AIM, CEA IRFU, CEA Saclay,CNRS,Serv Astrophys, F-91191 Gif Sur Yvette, France.
[Barbiellini, G.; Longo, F.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Barbiellini, G.; Longo, F.] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
[Bastieri, D.; Buson, S.; Rando, R.; Tibaldo, L.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Bastieri, D.; Buson, S.; Rando, R.; Tibaldo, L.] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
[Bonamente, E.; Cecchi, C.; Germani, S.; Lubrano, P.; Pepe, M.] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.
[Bonamente, E.; Cecchi, C.; Ciprini, S.; Germani, S.; Lubrano, P.; Pepe, M.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
[Brandt, T. J.; Knoedlseder, J.; Vilchez, N.] CNRS UPS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 4, France.
[Brandt, T. J.; Hughes, R. E.] Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Univ Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Politecn Bari, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; Monte, C.; Raino, S.; Spinelli, P.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Bruel, P.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Caliandro, G. A.; Hadasch, D.; Torres, D. F.] IEEC CSIC, Inst Ciencies Espai, Barcelona 08193, Spain.
[Caraveo, P. A.] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy.
[Chekhtman, A.; Dermer, C. D.; Johnson, W. N.; Lovellette, M. N.; Makeev, A.; Parent, D.; Strickman, M. S.; Wood, K. S.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Chekhtman, A.; Makeev, A.; Parent, D.] George Mason Univ, Fairfax, VA 22030 USA.
[Cohen-Tanugi, J.; Mehault, J.; Nuss, E.; Pelassa, V.; Piron, F.] Univ Montpellier 2, CNRS, IN2P3, Lab Phys Theor & Astroparticules, Montpellier, France.
[Conrad, J.; Garde, M. Llena; Ripken, J.; Yang, Z.] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
[Conrad, J.; Garde, M. Llena; Ripken, J.; Yang, Z.] Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.
[Ferrara, E. C.; Harding, A. K.; McEnery, J. E.; Thompson, D. J.; Vasileiou, V.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Fukazawa, Y.; Hanabata, Y.; Hayashi, K.; Itoh, R.; Katagiri, H.; Mizuno, T.; Nishino, S.; Sada, T.; Uehara, T.] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan.
[Giroletti, M.] INAF Ist Radioastron, I-40129 Bologna, Italy.
[Guiriec, S.] Univ Alabama, CSPAR, Huntsville, AL 35899 USA.
[Kataoka, J.] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan.
[Martin, P.; Orlando, E.; Strong, A. W.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[McEnery, J. E.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[McEnery, J. E.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Morselli, A.; Vitale, V.] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.
[Norris, J. P.; Ormes, J. F.] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA.
[Ohsugi, T.; Takahashi, H.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan.
[Okumura, A.; Ozaki, M.; Takahashi, T.] JAXA, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria.
[Sadrozinski, H. F. -W.; Ziegler, M.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Sadrozinski, H. F. -W.; Ziegler, M.] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA.
[Siskind, E. J.] NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA.
[Suson, D. J.] Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA.
[Torres, D. F.] ICREA, Barcelona, Spain.
[Tramacere, A.] CIFS, I-10133 Turin, Italy.
[Tramacere, A.] INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland.
[Vasileiou, V.] CRESST, Greenbelt, MD 20771 USA.
[Vasileiou, V.] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA.
[Vasileiou, V.] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
[Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
RP Ackermann, M (reprint author), Stanford Univ, Dept Phys, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA.
EM isabelle.grenier@cea.fr; mizuno@hep01.hepl.hiroshima-u.ac.jp;
luigi.tibaldo@pd.infn.it
RI Loparco, Francesco/O-8847-2015; Johannesson, Gudlaugur/O-8741-2015;
Moskalenko, Igor/A-1301-2007; Mazziotta, Mario /O-8867-2015; Sgro,
Carmelo/K-3395-2016; Torres, Diego/O-9422-2016; Orlando, E/R-5594-2016;
Gargano, Fabio/O-8934-2015; Thompson, David/D-2939-2012; Harding,
Alice/D-3160-2012; McEnery, Julie/D-6612-2012; Baldini,
Luca/E-5396-2012; lubrano, pasquale/F-7269-2012; Morselli,
Aldo/G-6769-2011; Kuss, Michael/H-8959-2012; giglietto,
nicola/I-8951-2012; Reimer, Olaf/A-3117-2013; Ozaki,
Masanobu/K-1165-2013; Rando, Riccardo/M-7179-2013; Johnson,
Neil/G-3309-2014; Funk, Stefan/B-7629-2015
OI Loparco, Francesco/0000-0002-1173-5673; Johannesson,
Gudlaugur/0000-0003-1458-7036; Moskalenko, Igor/0000-0001-6141-458X;
Mazziotta, Mario /0000-0001-9325-4672; Torres,
Diego/0000-0002-1522-9065; Giordano, Francesco/0000-0002-8651-2394;
Caraveo, Patrizia/0000-0003-2478-8018; Sgro',
Carmelo/0000-0001-5676-6214; Rando, Riccardo/0000-0001-6992-818X;
Gargano, Fabio/0000-0002-5055-6395; Thompson, David/0000-0001-5217-9135;
lubrano, pasquale/0000-0003-0221-4806; Morselli,
Aldo/0000-0002-7704-9553; giglietto, nicola/0000-0002-9021-2888; Reimer,
Olaf/0000-0001-6953-1385; Funk, Stefan/0000-0002-2012-0080
FU K. A. Wallenberg Foundation; International Doctorate on Astroparticle
Physics (IDAPP) program; NASA [NNX09AC15G]
FX Royal Swedish Academy of Sciences Research Fellow, funded by a grant
from the K. A. Wallenberg Foundation.; Partially supported by the
International Doctorate on Astroparticle Physics (IDAPP) program.; This
paper makes use of a development version of GALPROP provided by the
GALPROP team to the LAT collaboration solely for interpretation of the
LAT data. GALPROP development is supported by NASA Grant NNX09AC15G.
NR 51
TC 51
Z9 51
U1 0
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 10
PY 2011
VL 726
IS 2
AR 81
DI 10.1088/0004-637X/726/2/81
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 698WB
UT WOS:000285623600025
ER
PT J
AU McLaughlin, SS
Peckham, SJ
Enis, JA
Koebbe, C
Smith, BD
AF McLaughlin, Sandra S.
Peckham, Steven J.
Enis, John A.
Koebbe, Christopher
Smith, Benjamin D.
TI Young Woman With Thymoma Metastatic to the Brain Controlled With Gross
Total Resection and Stereotactic Radiosurgery, With a Subsequent
Uncomplicated Pregnancy
SO JOURNAL OF CLINICAL ONCOLOGY
LA English
DT Editorial Material
ID MALIGNANT THYMOMA; INVASIVE THYMOMA; THYMIC CARCINOMA
C1 [McLaughlin, Sandra S.] USN, Hlth Clin Patuxent River, Patuxent River, MD USA.
[Peckham, Steven J.; Enis, John A.; Koebbe, Christopher] Wilford Hall USAF Med Ctr, Lackland AFB, TX USA.
[Smith, Benjamin D.] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA.
RP McLaughlin, SS (reprint author), USN, Hlth Clin Patuxent River, Patuxent River, MD USA.
OI Smith, Benjamin/0000-0001-7866-1093
NR 30
TC 1
Z9 1
U1 0
U2 0
PU AMER SOC CLINICAL ONCOLOGY
PI ALEXANDRIA
PA 2318 MILL ROAD, STE 800, ALEXANDRIA, VA 22314 USA
SN 0732-183X
J9 J CLIN ONCOL
JI J. Clin. Oncol.
PD JAN 10
PY 2011
VL 29
IS 2
BP E30
EP E33
DI 10.1200/JCO.2010.31.0003
PG 4
WC Oncology
SC Oncology
GA 703GC
UT WOS:000285965400004
PM 20940185
ER
PT J
AU Fok, MC
Moore, TE
Slinker, SP
Fedder, JA
Delcourt, DC
Nose, M
Chen, SH
AF Fok, Mei-Ching
Moore, Thomas E.
Slinker, Steve P.
Fedder, Joel A.
Delcourt, Dominique C.
Nose, Masahito
Chen, Sheng-Hsien
TI Modeling the superstorm in November 2003
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID GLOBAL MHD SIMULATION; ION-CYCLOTRON WAVES; RING CURRENT IONS; INNER
MAGNETOSPHERE; GEOMAGNETIC STORMS; ELECTRIC-FIELDS; MAGNETIC-FIELD;
IONOSPHERE; PARTICLES; ENERGY
AB The superstorm on 20-21 November 2003 was the largest geomagnetic storm in solar cycle 23 as measured by Dst, which attained a minimum value of -422 nT. We have simulated this storm to understand how particles originating from the solar wind and ionosphere get access to the magnetosphere and how the subsequent transport and energization processes contribute to the buildup of the ring current. The global electromagnetic configuration and the solar wind H+ distribution are specified by the Lyon-Fedder-Mobarry (LFM) magnetohydrodynamics model. The outflow of H+ and O+ ions from the ionosphere are also considered. Their trajectories in the magnetosphere are followed by a test-particle code. The particle distributions at the inner plasma sheet established by the LFM model and test-particle calculations are then used as boundary conditions for a ring current model. Our simulations reproduce the rapid decrease of Dst during the storm main phase and the fast initial phase of recovery. Shielding in the inner magnetosphere is established at early main phase. This shielding field lasts several hours and then breaks down at late main phase. At the peak of the storm, strong penetration of ions earthward to L shell of 1.5 is revealed in the simulation. It is surprising that O+ is significant but not the dominant species in the ring current in our calculation for this major storm. It is very likely that substorm effects are not well represented in the models and O+ energization is underestimated. Ring current simulation with O+ energy density at the boundary set comparable to Geotail observations produces excellent agreement with the observed symH. As expected in superstorms, ring current O+ is the dominant species over H+ during the main to midrecovery phase of the storm.
C1 [Fok, Mei-Ching; Moore, Thomas E.; Chen, Sheng-Hsien] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Delcourt, Dominique C.] Ecole Polytech, CNRS, UMR 7648, Lab Phys Plasmas, F-94107 St Maur Des Fosses, France.
[Fedder, Joel A.] Leading Edge Technol Inc, Alexandria, VA 22308 USA.
[Nose, Masahito] Kyoto Univ, Grad Sch Sci, Data Anal Ctr Geomagnetism & Space Magnetism, Sakyo Ku, Kyoto 6068502, Japan.
[Slinker, Steve P.] USN, Res Lab, Washington, DC 20375 USA.
RP Fok, MC (reprint author), NASA, Goddard Space Flight Ctr, Code 673,Bldg 21,Rm 248, Greenbelt, MD 20771 USA.
EM mei-ching.h.fok@nasa.gov
RI Moore, Thomas/D-4675-2012; Fok, Mei-Ching/D-1626-2012; Nose,
Masahito/B-1900-2015
OI Moore, Thomas/0000-0002-3150-1137; Nose, Masahito/0000-0002-2789-3588
FU NASA Heliophysics Division [936723.02.01.03.82, 955518.02.01.02.57];
NASA [R0608]
FX We gratefully acknowledge use of the ACE solar wind data provided
through OMNI and Geotail data from http://sd-www.jhuapl.edu/Geotail/.
The Dst and symH data are provided by the World Data Center for
Geomagnetism, Kyoto, Japan. We would like to thank Natalia Buzulukova
for valuable comments. We also thank Manuel Buenfil and Robert Wiegand
for performing the test-particle and bulk parameter calculations. We
acknowledge support from the NASA Heliophysics Division through the
ROSES program under Work Breakdown Structures 936723.02.01.03.82 and
955518.02.01.02.57, and NASA's High Performance Computing Program under
task R0608.
NR 55
TC 12
Z9 12
U1 0
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD JAN 7
PY 2011
VL 116
AR A00J17
DI 10.1029/2010JA015720
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 704NS
UT WOS:000286060300001
ER
PT J
AU Garg, S
Gao, HX
Parrish, DA
Shreeve, JM
AF Garg, Sonali
Gao, Haixiang
Parrish, Damon A.
Shreeve, Jean'ne M.
TI FOX-7 (1,1-Diamino-2,2-dinitroethene): Trapped by Copper and Amines
SO INORGANIC CHEMISTRY
LA English
DT Article
ID CRYSTAL-STRUCTURE; ENERGETIC MOLECULES; IMPACT SENSITIVITY;
THERMAL-BEHAVIOR; REACTIVITY; DADNE; DERIVATIVES; SALTS
AB Syntheses of the first Cu(NH3)(2)(FOX)(2) and various Cu(amine)(2)(FOX)(2) (methyl, propyl, and dimethyl amine) complexes were achieved by using metathetical reactions which add a new chapter to the metal chemistry of FOX-7 (1,1-diamino-2,2-dintroethene). The crystal structures of Cu(NH3)(2)(FOX)(2) and Cu(C3H7NH2)(2)(FOX)(2) which show square planar geometry at copper aid in the understanding of the bonding modes in FOX-7 copper complexes which is supported by natural bond orbital (NBO) calculations. Water-free K-FOX was also structured.
C1 [Garg, Sonali; Shreeve, Jean'ne M.] Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
[Gao, Haixiang] China Agr Univ, Dept Appl Chem, Beijing 100193, Peoples R China.
[Parrish, Damon A.] USN, Res Lab, Washington, DC 20375 USA.
RP Shreeve, JM (reprint author), Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
EM jshreeve@uidaho.edu
FU DTRA [HDTRA1-07-1-0024]; ONR [N00014-10-1-0097]
FX The authors gratefully acknowledge the support of the DTRA
(HDTRA1-07-1-0024), and ONR (N00014-10-1-0097).
NR 47
TC 23
Z9 29
U1 1
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
J9 INORG CHEM
JI Inorg. Chem.
PD JAN 3
PY 2011
VL 50
IS 1
BP 390
EP 395
DI 10.1021/ic102136r
PG 6
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 697ZK
UT WOS:000285559800043
PM 21138305
ER
PT S
AU Ferguson, J
Sodhi, M
AF Ferguson, James
Sodhi, Manbir
BE Hu, B
Morasch, K
Pickl, S
Siegle, M
TI Using Simulation for Setting Terms of Performance Based Contracts
SO OPERATIONS RESEARCH PROCEEDINGS 2010
SE Operations Research Proceedings
LA English
DT Proceedings Paper
CT Annual International Conference of the
German-Operations-Research-Society (GOR)
CY SEP 01-03, 2010
CL Univ Bundeswehr Munchen, Neubiberg, GERMANY
SP German Operat Res Soc (GOR), Italian Operat Res Soc (AIRO)
HO Univ Bundeswehr Munchen
AB This paper discusses the use of a simulation model for setting terms of performance based contracts. Metrics commonly used in measuring service and supply performance are examined for their utility in achieving the outcomes of interest for contracts, and the correlations amongst these metrics are determined using simulation models. These correlations are used to highlight the most significant measurable quantities, and the performance limits for these are specified so as to achieve desired outcomes for various system performance indicators. The impact of penalties and incentives are also evaluated using the simulations. Practical issues such as obsolescence, reliability, and cost are also discussed. The exploration of this concept in setting terms for a contract at the Naval Undersea Warfare Center is also illustrated.
C1 [Ferguson, James] USN, Undersea Warfare Ctr, Code 81 Torpedoes, Narragansett, RI 02882 USA.
[Sodhi, Manbir] Univ Rhode Isl, Dept Mech & Ind Syst Eng, Kingston, RI 02881 USA.
RP Ferguson, J (reprint author), USN, Undersea Warfare Ctr, Code 81 Torpedoes, Narragansett, RI 02882 USA.
EM james.c.ferguson@navy.mil; sodhi@uri.edu
NR 9
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0721-5924
BN 978-3-642-20009-0; 978-3-642-20008-3
J9 OPERAT RES PROCEED
PY 2011
BP 465
EP 470
DI 10.1007/978-3-642-20009-0_74
PG 6
WC Operations Research & Management Science
SC Operations Research & Management Science
GA BCT20
UT WOS:000311337700087
ER
PT S
AU Guth, PL
AF Guth, Peter L.
BA Smith, MJ
Paron, P
Griffiths, JS
BF Smith, MJ
Paron, P
Griffiths, JS
TI Military Applied Geomorphological Mapping: Normandy Case Study
SO GEOMORPHOLOGICAL MAPPING: METHODS AND APPLICATIONS
SE Developments in Earth Surface Processes
LA English
DT Article; Book Chapter
C1 USN Acad, Dept Oceanog, Annapolis, MD 21402 USA.
RP Guth, PL (reprint author), USN Acad, Dept Oceanog, Annapolis, MD 21402 USA.
NR 19
TC 2
Z9 2
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0928-2025
BN 978-0-44-453536-8
J9 DEV EARTH S
PY 2011
VL 15
BP 577
EP 588
DI 10.1016/B978-0-444-53446-0.00023-9
PG 12
WC Geology; Geosciences, Multidisciplinary
SC Geology
GA BCO87
UT WOS:000310920700023
ER
PT S
AU Swope, K
Wielgus, R
Schmitt, P
Cadigan, J
AF Swope, Kurtis
Wielgus, Ryan
Schmitt, Pamela
Cadigan, John
BE Isaac, RM
Norton, DA
TI CONTRACTS, BEHAVIOR, AND THE LAND-ASSEMBLY PROBLEM: AN EXPERIMENTAL
STUDY
SO EXPERIMENTS ON ENERGY, THE ENVIRONMENT, AND SUSTAINABILITY
SE Research in Experimental Economics
LA English
DT Article; Book Chapter
DE Land assembly; land fragmentation; holdout problem; holdup problem
ID HOLD-UP PROBLEM; ULTIMATUM GAME; INFORMATION; FAIRNESS; FRAGMENTATION;
COMPETITION; EVOLUTION; OPTIONS
AB Purpose - Land assembly can mitigate the negative environmental impacts of land fragmentation on urban areas, agriculture, and wildlife. However, the assembler faces several obstacles including transactions costs and the strategic bargaining behavior of landowners. The purpose of this chapter is to examine how the order of bargaining and the nature of contracts may impact the land assembler's problem.
Methodology - We develop theoretical predictions of subjects' behavior and compare these to behavior in a laboratory land-assembly game with monetary incentives.
Findings - Sellers bargain more aggressively when bargaining is sequential compared to simultaneous. Noncontingent contracts increase bargaining delay and the likelihood of failed agreements. Buyers and sellers act more aggressively when there are multiple bargaining periods, leading to significant bargaining delay. When a seller has an earnings advantage in the laboratory, it is the first seller to bargain in noncontingent contract treatments. In sequential bargaining treatments, most sellers preferred to be the first seller to bargain.
Research limitations - Our laboratory experiments involved only two sellers, complete information, and costless delay. Land assembly in the field may involve many sellers, incomplete information, and costly delay.
Practical implications - Some of our results contradict conventional wisdom and a common result from the land-assembly literature that it is advantageous to be the last seller to bargain, a so-called "holdout.'' Our results also imply that fully overcoming the holdout problem may require subsidies or compulsory acquisition.
Originality - This chapter is one of the first to experimentally investigate the land-assembly problem, and the first to specifically examine the role of bargaining order and contract type.
C1 [Swope, Kurtis; Wielgus, Ryan; Schmitt, Pamela] USN Acad, Annapolis, MD 21402 USA.
[Cadigan, John] Gettysburg Coll, Gettysburg, PA USA.
RP Swope, K (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 35
TC 6
Z9 6
U1 0
U2 5
PU EMERALD GROUP PUBLISHING LTD
PI BINGLEY
PA HOWARD HOUSE, WAGON LANE, BINGLEY, W YORKSHIRE BD16 1WA, ENGLAND
SN 0193-2306
BN 978-0-85724-747-6
J9 RES EXP ECON
PY 2011
VL 14
BP 151
EP 180
DI 10.1108/S0193-2306(2011)0000014008
PG 30
WC Environmental Studies
SC Environmental Sciences & Ecology
GA BBK87
UT WOS:000307230500006
ER
PT S
AU Caldwell, JD
Stahlbush, RE
Mahadik, NA
AF Caldwell, J. D.
Stahlbush, R. E.
Mahadik, N. A.
BE Shenai, K
Garg, R
Ma, R
Dudley, M
Khan, A
TI Mitigating Defects within Silicon Carbide Epitaxy
SO GALLIUM NITRIDE AND SILICON CARBIDE POWER TECHNOLOGIES
SE ECS Transactions
LA English
DT Proceedings Paper
CT Symposium on GaN and SiC Power Technologies held during the 220th
Meeting of the Electrochemical-Society
CY OCT 09-14, 2011
CL Boston, MA
SP Electrochem Soc, Dielect Sci & Technol, Elect & Photon
ID INDUCED STACKING-FAULTS; 4H-SIC PIN DIODES; I-N-DIODES; DISLOCATIONS;
GROWTH; PROPAGATION; SUBSTRATE; BREAKDOWN; DEVICES; DRIFT
AB Over the past decade, significant progress has been made in reducing the density of several extended and point defects within silicon carbide substrates and epitaxy. For instance, great success has been achieved in the elimination of micropipes and reductions in the lifetime killing point defect Z(1/2). However, a wide-array of extended defects persist, ranging from various types of stacking faults and threading dislocations. An overview of the current status of these efforts is outlined here.
C1 [Caldwell, J. D.; Stahlbush, R. E.] USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
RP Caldwell, JD (reprint author), USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
RI Caldwell, Joshua/B-3253-2008
OI Caldwell, Joshua/0000-0003-0374-2168
NR 66
TC 0
Z9 0
U1 1
U2 2
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-262-2
J9 ECS TRANSACTIONS
PY 2011
VL 41
IS 8
BP 261
EP 271
DI 10.1149/1.3631503
PG 11
WC Electrochemistry; Engineering, Electrical & Electronic; Physics, Applied
SC Electrochemistry; Engineering; Physics
GA BCB39
UT WOS:000309600300024
ER
PT J
AU Jensen, KL
Yater, JE
Shaw, JL
Pate, BB
Montgomery, EJ
Feldman, DW
O'Shea, PG
AF Jensen, K. L.
Yater, J. E.
Shaw, J. L.
Pate, B. B.
Montgomery, E. J.
Feldman, D. W.
O'Shea, P. G.
BE Klumper, A
TI Time Dependent Emission From Coated Metals and Semiconductors
SO 2011 24TH INTERNATIONAL VACUUM NANOELECTRONICS CONFERENCE (IVNC)
LA English
DT Proceedings Paper
CT 24th International Vacuum Nanoelectronics Conference (IVNC)
CY JUL 18-22, 2011
CL Wuppertal, GERMANY
SP Bergische Univ Wuppertal, IEEE - Electron Device Soc (EDS), Gesellschaft Freunde Bergischen Univ (GFBU), Comp Simulat Technol AG (CST), Bruker Adv Supercon GmbH (BRUKER), Keyence Deutschland GmbH (KEYENCE)
AB Photoemission predictions are often based on a Three Step (absorption, transport, emission) model. The transport calculation therein generally assumes that scattering events are fatal to electron emission. Using Monte Carlo and material dependent scattering terms for metals and semiconductors, the "fatal approximation" is assessed. Photoemission data from cesiated tungsten dispenser photocathodes is reexamined with respect to the new models. The emitted current is segregated into two groups: electrons which do not scatter before emission and those that do. Each has a characteristic time response for which simple models are developed. A simple extension to semiconductors will be proposed in the presentation.
C1 [Jensen, K. L.; Yater, J. E.; Shaw, J. L.; Pate, B. B.] US Navy, Res Lab, Washington, DC 20375 USA.
[Montgomery, E. J.; Feldman, D. W.; O'Shea, P. G.] Univ Maryland, College Pk, MD USA.
RP Jensen, KL (reprint author), US Navy, Res Lab, Washington, DC 20375 USA.
EM kljensen@ieee.org
RI Jensen, Kevin/I-1269-2015; Pate, Bradford/B-4752-2010
OI Jensen, Kevin/0000-0001-8644-1680; Pate, Bradford/0000-0002-3288-2947
FU Joint Technology Office and the Office of Naval Research
FX We gratefully acknowledge support from the Joint Technology Office and
the Office of Naval Research.
NR 2
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-3-00-035081-8
PY 2011
BP 91
EP +
PG 2
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BCC50
UT WOS:000309723000046
ER
PT J
AU Shaw, JL
Wood, FN
Yater, JE
Jensen, KL
Pate, BB
Hanna, JM
Feygelson, TI
Butler, JE
AF Shaw, J. L.
Wood, F. N.
Yater, J. E.
Jensen, K. L.
Pate, B. B.
Hanna, J. M.
Feygelson, T. I.
Butler, J. E.
BE Klumper, A
TI Images of Electron Transmission through Thin Diamond Films
SO 2011 24TH INTERNATIONAL VACUUM NANOELECTRONICS CONFERENCE (IVNC)
LA English
DT Proceedings Paper
CT 24th International Vacuum Nanoelectronics Conference (IVNC)
CY JUL 18-22, 2011
CL Wuppertal, GERMANY
SP Bergische Univ Wuppertal, IEEE - Electron Device Soc (EDS), Gesellschaft Freunde Bergischen Univ (GFBU), Comp Simulat Technol AG (CST), Bruker Adv Supercon GmbH (BRUKER), Keyence Deutschland GmbH (KEYENCE)
DE diamond; negative electron affinity; emission microscope; electron beam
amplifier; surface transport
AB Images of electron emission from an 8 micron thick diamond sheet, resulting from electron bombardment on a limited area of the back side, reveal emission from the entire negative electron affinity surface. This shows electrons move several hundred microns from the generation volume before being emitted, probably in states at the surface.
C1 [Shaw, J. L.; Wood, F. N.; Yater, J. E.; Jensen, K. L.; Pate, B. B.] USN, Res Lab, Washington, DC 20375 USA.
[Hanna, J. M.] Beam Wave Res, Silver Spring, MD USA.
[Feygelson, T. I.; Butler, J. E.] SAIC, Mclean, VA USA.
RP Shaw, JL (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM jon.shaw@nrl.navy.mil
RI Jensen, Kevin/I-1269-2015; Pate, Bradford/B-4752-2010
OI Jensen, Kevin/0000-0001-8644-1680; Pate, Bradford/0000-0002-3288-2947
FU Office of Naval Research through the Naval Research Lab
FX This work was supported by the Office of Naval Research through the
Naval Research Lab.
NR 4
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-3-00-035081-8
PY 2011
BP 169
EP +
PG 2
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BCC50
UT WOS:000309723000085
ER
PT S
AU Mastro, MA
Kim, HY
Ahn, J
Kim, J
Hite, JK
Eddy, CR
AF Mastro, M. A.
Kim, H. -Y.
Ahn, J.
Kim, J.
Hite, J. K.
Eddy, C. R., Jr.
BE Overberg, ME
LaRoche, J
Mishra, K
Johnson, W
TI Space Charge Limited Current and Polarization in AlGaN/GaN Nanowires
SO STATE-OF-THE-ART PROGRAM ON COMPOUND SEMICONDUCTORS 53 (SOTAPOCS 53)
SE ECS Transactions
LA English
DT Proceedings Paper
CT Symposium on State-of-the-Art Program on Compound Semiconductors 53
(SOTAPOCS) held during the 220th Meeting of the Electrochemical-Society
(ECS)
CY OCT 09-14, 2011
CL Boston, MA
SP Electrochem Soc (ECS), Elect & Photon, Luminescence & Display Mat
AB An undoped AlGaN/GaN nanowire displayed a transition at approximately 2V from Ohmic conduction at low drain-source voltage to space charge limited conduction at high drain-source voltage. Growth of the nanowire from a metal seed manifests as a triangular cross-section with one Ga-polar (0001) facet and two semi-polar {-110-1} facets. Conduction was based on a polarization induced two-dimensional electron gas that formed at the (0001) AlGaN/GaN interface. A simulation showed that the surface and the opposing polarization field at the semi-polar AlGaN/GaN interface will distort and reduce the carrier concentration at the (0001) AlGaN/GaN interface.
C1 [Mastro, M. A.; Hite, J. K.; Eddy, C. R., Jr.] USN, Res Lab, Washington, DC 20375 USA.
RP Mastro, MA (reprint author), USN, Res Lab, Washington, DC 20375 USA.
RI Hite, Jennifer/L-5637-2015
OI Hite, Jennifer/0000-0002-4090-0826
NR 7
TC 0
Z9 0
U1 0
U2 4
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-260-8
J9 ECS TRANSACTIONS
PY 2011
VL 41
IS 6
BP 33
EP 38
DI 10.1149/1.3629951
PG 6
WC Electrochemistry; Nanoscience & Nanotechnology; Physics, Applied
SC Electrochemistry; Science & Technology - Other Topics; Physics
GA BCB08
UT WOS:000309536900003
ER
PT S
AU Chu, PC
Wheatley, NS
AF Chu, P. C.
Wheatley, N. S.
BE Benassai, G
Brebbia, CA
Rodriguez, G
TI Temporal and spatial variability of bottom sedimentation for survey
periodicity
SO COASTAL PROCESSES II
SE WIT Transactions on Ecology and the Environment
LA English
DT Proceedings Paper
CT 2nd International Conference on Physical Coastal Processes, Management
and Engineering
CY APR 27-29, 2011
CL Naples, ITALY
SP Univ Las Palmas, Wessex Inst Technol, Univ Parthenope, WIT, Transact Ecol & Environm, ASCE UK Grp
DE survey periodicity; sediment; bedforms; San Francisco Bay; suitability
model
AB Bedforms determine survey periodicity. Sediment grain size, tides, currents, and wind-generated waves are influential in bedform formation. To investigate if sediment properties change over time, localized grab samples for a three-year period in San Francisco Bay were analyzed. The analysis showed little variability in sediment characteristics at a given location. A weighted suitability model based on the United Kingdom Hydrographic Office (UKHO) model has been constructed. Three layers were developed including sediment grain size, interpolated from 174 grab samples, tidal and current data from over 50 current stations and ripple height inferred from wind generated wave height. A weighting for each layer was determined. Regions indicating the presence of bedforms were assigned a low survey periodicity; as bedforms reduced, survey periodicity was increased.
C1 [Chu, P. C.; Wheatley, N. S.] USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
RP Chu, PC (reprint author), USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
NR 8
TC 0
Z9 0
U1 0
U2 1
PU WIT PRESS
PI SOUTHAMPTON
PA ASHURST LODGE, SOUTHAMPTON SO40 7AA, ASHURST, ENGLAND
SN 1743-3541
BN 978-1-84564-534-2
J9 WIT TRANS ECOL ENVIR
JI WIT Trans. Ecol. Environ.
PY 2011
VL 149
BP 203
EP 214
DI 10.2495/CP110171
PG 12
WC Environmental Sciences; Water Resources
SC Environmental Sciences & Ecology; Water Resources
GA BCA36
UT WOS:000309430200017
ER
PT S
AU Burke, AA
Carreiro, LG
AF Burke, A. A.
Carreiro, L. G.
BE ShaoHorn, Y
Dudney, N
Fuller, T
TI Electrochemical Reduction of Sulfur Hexafluoride in Novel,
Air-Independent Power Systems
SO METAL/AIR, METAL/SULFUR, AND METAL/WATER BATTERIES
SE ECS Transactions
LA English
DT Proceedings Paper
CT Symposium on Metal/Air, Metal/Sulfur, and Metal/Water Batteries held
during the 219th Meeting of the Electrochemical-Society (ECS)
CY MAY 01-06, 2011
CL Montreal, CANADA
SP Electrochem Soc (ECS), Battery, Energy Technol
AB The electrochemical reduction of sulfur hexafluoride (SF6) was investigated in cells using 1-n-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide electrolyte with additives to enhance SF6 solubility and anode activity. Magnesium was used as the counter electrode (anode) in these cells. In post run analyses, metal fluoride formations at the anode and sulfur deposits at the cathode were found. These findings are possible evidence of SF6 decomposition; however, degradation of the electrolyte may have also been the source of these reaction by-products. Output power over 1 mW was demonstrated in the cell.
C1 [Burke, A. A.; Carreiro, L. G.] USN, Undersea Warfare Ctr, Div Newport, Newport, RI 02841 USA.
RP Burke, AA (reprint author), USN, Undersea Warfare Ctr, Div Newport, Newport, RI 02841 USA.
NR 8
TC 0
Z9 0
U1 0
U2 1
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-293-6
J9 ECS TRANSACTIONS
PY 2011
VL 35
IS 33
BP 3
EP 10
DI 10.1149/1.3655432
PG 8
WC Electrochemistry
SC Electrochemistry
GA BCA85
UT WOS:000309511600001
ER
PT S
AU Chervin, CN
Long, JW
Brandell, NL
Rolison, DR
AF Chervin, C. N.
Long, J. W.
Brandell, N. L.
Rolison, D. R.
BE ShaoHorn, Y
Dudney, N
Fuller, T
TI Carbon Nanofoam-Based Cathodes for Li-O-2 Batteries: Correlation of Pore
square Solid Architecture and Electrochemical Performance
SO METAL/AIR, METAL/SULFUR, AND METAL/WATER BATTERIES
SE ECS Transactions
LA English
DT Proceedings Paper
CT Symposium on Metal/Air, Metal/Sulfur, and Metal/Water Batteries held
during the 219th Meeting of the Electrochemical-Society (ECS)
CY MAY 01-06, 2011
CL Montreal, CANADA
SP Electrochem Soc (ECS), Battery, Energy Technol
ID AIR BATTERIES; LI-AIR; LITHIUM; ELECTRODES
AB We investigated the effect of cathode pore-size distribution on the specific capacity of Li-O-2 cells using binder-free, catalyst-free carbon nanofoam architectures prepared by infiltrating carbon fiber papers with a resorcinol-formaldehyde sol. Four sets of carbon nanofoam papers were synthesized with pore-size distributions ranging from mesopores (5-50 nm) to small macropores (50-200 nm) by selecting the weight fraction of solids as either 50 or 40 wt% and setting the molar ratio of resorcinol to catalyst at either 1500 or 500. The specific capacity of Li-O-2 cells tracked the average pore size of the pore network in the carbon nanofoam of the air cathode, rather than the specific surface area of the nanoscale carbon network. The macroporous nanofoams yield cell capacities of 400-500 mAh g(-1), similar to 2x that of the mesoporous nanofoams (similar to 200 mA h g(-1)), even though the macroporous foams had lower specific surface areas (similar to 350-450 vs. similar to 500 m(2) g(-1)). For the four nanofoam architectures studied, the capacity is limited by pore occlusion arising from solid product electrogenerated near the O-2-facing boundary and not the respective total pore volumes.
C1 [Chervin, C. N.; Long, J. W.; Brandell, N. L.; Rolison, D. R.] USN, Res Lab, Washington, DC 20375 USA.
RP Chervin, CN (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 14
TC 6
Z9 6
U1 0
U2 11
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-293-6
J9 ECS TRANSACTIONS
PY 2011
VL 35
IS 33
BP 33
EP 42
DI 10.1149/1.3655435
PG 10
WC Electrochemistry
SC Electrochemistry
GA BCA85
UT WOS:000309511600004
ER
PT S
AU Bernstein, ES
Barrett, FJ
AF Bernstein, Ethan S.
Barrett, Frank J.
BE Shani, AB
Woodman, RW
Pasmore, WA
TI STRATEGIC CHANGE AND THE JAZZ MINDSET: EXPLORING PRACTICES THAT ENHANCE
DYNAMIC CAPABILITIES FOR ORGANIZATIONAL IMPROVISATION
SO RESEARCH IN ORGANIZATIONAL CHANGE AND DEVELOPMENT, VOL 19
SE Research in Organizational Change and Development
LA English
DT Article; Book Chapter
ID INNOVATION; AMBIDEXTERITY; EVOLUTION; PRODUCT; ANTECEDENTS; PERFORMANCE;
DELIBERATE; ADVANTAGE; FAILURE; STILL
AB How can leaders adopt a mindset that maximizes learning, remains responsive to short-term emergent opportunities, and simultaneously strengthens longer-term dynamic capabilities of the organization? This chapter explores the organizational decisions and practices leaders can initiate to extend, strengthen, or transform "ordinary capabilities'' (Winter, 2003) into enhanced improvisational competence and dynamic capabilities. We call this leadership logic the "jazz mindset.'' We draw upon seven characteristics of jazz bands as outlined by Barrett (1998) to show that strategic leaders of business organizations can enhance dynamic capabilities by strengthening practices observed in improvising jazz bands.
C1 [Bernstein, Ethan S.] Harvard Univ, Sch Business, Management Program, Boston, MA 02163 USA.
[Barrett, Frank J.] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Monterey, CA USA.
RP Bernstein, ES (reprint author), Harvard Univ, Sch Business, Management Program, Boston, MA 02163 USA.
NR 76
TC 5
Z9 5
U1 0
U2 5
PU EMERALD GROUP PUBLISHING LTD
PI BINGLEY
PA HOWARD HOUSE, WAGON LANE, BINGLEY, W YORKSHIRE BD16 1WA, ENGLAND
SN 0897-3016
BN 978-1-78052-022-3
J9 RES ORGAN CHAN DEV
PY 2011
VL 19
BP 55
EP 90
DI 10.1108/S0897-3016(2011)0000019005
PG 36
WC Psychology, Applied; Management
SC Psychology; Business & Economics
GA BZO78
UT WOS:000302271200003
ER
PT J
AU Brabec, C
Lane, P
Kafafi, ZH
AF Brabec, Christoph
Lane, Paul
Kafafi, Zakya H.
TI Guest Editorial: Special Section on Organic Photovoltaics
SO JOURNAL OF PHOTONICS FOR ENERGY
LA English
DT Editorial Material
C1 [Brabec, Christoph] Univ Erlangen Nurnberg, D-91058 Erlangen, Germany.
[Brabec, Christoph] ZAE Bavaria, Div 3, D-91058 Erlangen, Germany.
[Lane, Paul] USN, Res Lab, Washington, DC 20375 USA.
[Kafafi, Zakya H.] Natl Sci Fdn, Div Mat Res, Arlington, VA 22230 USA.
RP Brabec, C (reprint author), Univ Erlangen Nurnberg, Martenstr 7, D-91058 Erlangen, Germany.
RI Brabec, Christoph/N-1897-2013
NR 0
TC 1
Z9 1
U1 0
U2 0
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 1947-7988
J9 J PHOTON ENERGY
JI J. Photonics Energy
PY 2011
VL 1
SI 2
AR 011199
DI 10.1117/1.3576111
PG 1
WC Materials Science, Multidisciplinary; Optics; Physics, Applied
SC Materials Science; Optics; Physics
GA 014FZ
UT WOS:000309361900025
ER
PT J
AU Lane, PA
Chen, S
So, F
AF Lane, Paul A.
Chen, Song
So, Franky
TI Electromodulated doping of the hole transport layer in a small molecule
organic light-emitting diode
SO JOURNAL OF PHOTONICS FOR ENERGY
LA English
DT Article
DE organic electroluminescence; organic light-emitting diode;
electroabsorption; spectroscopy; doping
ID ELECTRIC-FIELD DISTRIBUTION; ELECTROABSORPTION SPECTROSCOPY;
ELECTROLUMINESCENT DEVICES; BUFFER LAYER; POLYMER; INJECTION;
PERFORMANCE; INSERTION; ALUMINUM; BARRIERS
AB Electromodulation spectroscopy has been used to probe the effect of a polymer hole injection layer on electric fields and charge injection in vacuum-deposited organic light-emitting diodes. The electromodulation spectrum consists of electroabsorption of the transport layers and excited state absorption of trapped cations in the hole transport layer. Field-dependent modulation of trapped charge at the interface between the injection and transport layers substantially modifies the electric field distribution within the device. In reverse bias, the electric field strength is suppressed within the hole transport layer and concentrated in the electron transport layer. In forward bias, field-dependent doping of the hole transport layer dominates the electromodulation spectrum. The field-dependent trap density is calculated to be of order 10(13) cm(-2), equivalent to mu C/cm(2) charge density. The built-in potential is estimated to be between 2.2 and 2.5 V, consistent with low carrier injection barriers. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3569109]
C1 [Lane, Paul A.] USN, Res Lab, Washington, DC 20375 USA.
[Chen, Song; So, Franky] Univ Florida, Dept Mat Sci & Engn, Athens, AL 35611 USA.
RP Lane, PA (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM paul.lane@nrl.navy.mil
RI Chen, Song/G-5195-2011
OI Chen, Song/0000-0001-8225-7560
NR 36
TC 6
Z9 6
U1 0
U2 8
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 1947-7988
J9 J PHOTON ENERGY
JI J. Photonics Energy
PY 2011
VL 1
SI 1
AR 011020
DI 10.1117/1.3569109
PG 12
WC Materials Science, Multidisciplinary; Optics; Physics, Applied
SC Materials Science; Optics; Physics
GA 014FW
UT WOS:000309361600020
ER
PT S
AU McCarthy, DD
AF McCarthy, Dennis D.
BE Seago, JH
Seaman, RL
Allen, SL
TI USING UTC TO DETERMINE THE EARTH'S ROTATION ANGLE
SO DECOUPLING CIVIL TIMEKEEPING FROM EARTH ROTATION
SE Science and Technology Series
LA English
DT Proceedings Paper
CT Colloquium Exploring Implications of Redefining Coordinated Universal
Time (UTC)
CY OCT 05-07, 2011
CL Analyt Graph Inc, Exton, PA
SP Amer Astronaut Soc, Amer Inst Aeronaut & Astronaut, Natl Opt Astron Observ, Virtual Astronom Observ
HO Analyt Graph Inc
AB The Earth's rotation angle is a critical component of the suite of five Earth orientation parameters used to transform between terrestrial and celestial reference systems. This angle is defined mathematically using an adopted conventional relationship between UT1 and the mathematical quantity known as "Earth Rotation Angle" (ERA). For practical purposes, then, UT1 UTC provides a convenient means to obtain UT1, knowing UTC, and thus the ERA. Because the Earth's rotational speed is variable, it is not practical to model UT1 as a function of time with the accuracy needed for many applications. Consequently astronomical and geodetic institutions from around the world share observations of the Earth's rotation angle and these data are then used to provide users the latest observations of UT1 UTC as well as predicted estimates with accuracy that depends on the prediction interval. This process can provide users with daily updates of UT1 UTC with accuracy of the order of tens of microseconds and predictions with accuracy better than 1 millisecond up to ten days in advance. The International Earth Rotation and Reference Systems Service (IERS) was established in 1987 by the International Astronomical Union and the International Union of Geodesy and Geophysics to provide this information operationally. In addition to the services routinely providing UT1 with sub-millisecond accuracy, UTC is currently adjusted to keep [UT1-UTC] < 0.9 seconds, and this definition provides a means to access UT1 automatically with accuracy of the order of one second. Should UTC be defined without the restriction keeping [UT1-UTC] < 0.9 seconds, the low accuracy estimate of UT1 (+/- 1 second) would no longer be assured. However the existing national and international services can be expected to provide the current products as they do now via paper bulletin and electronic means. It is assumed that the accuracy of those products will always reflect the state of the art. In the future, high-speed transfer of high-quality observational astronomical, meteorological, oceanic and geophysical data promise to decrease the latency of the observations and provide UT1 UTC at sub-daily intervals with increasingly improving accuracy. In addition to the current means of distribution, increasing access to electronic communication services has the potential to provide near real-time, state of the art UT1-UTC to users when and wherever it is needed. If there were sufficient demand, we might even envision a UT1-UTC application being made available for future hand-held devices.
C1 USN Observ, Washington, DC 20392 USA.
RP McCarthy, DD (reprint author), USN Observ, 3450 Massachusetts Ave NW, Washington, DC 20392 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU AMER ASTRONAUTICAL SOC
PI SAN DIEGO
PA PUBLICATIONS OFFICE PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 0278-4017
BN 978-0-87703-575-6
J9 SCI TECH
PY 2011
VL 113
BP 105
EP 116
PG 12
WC Astronomy & Astrophysics; Instruments & Instrumentation
SC Astronomy & Astrophysics; Instruments & Instrumentation
GA BBY78
UT WOS:000308895700008
ER
PT B
AU Jasparro, C
Taylor, J
AF Jasparro, Christopher
Taylor, Jonathan
BE Karan, PP
Subbiah, SP
TI Transnational Geopolitical Competition and Natural Disasters Lessons
from the Indian Ocean Tsunami
SO INDIAN OCEAN TSUNAMI: THE GLOBAL RESPONSE TO A NATURAL DISASTER
LA English
DT Article; Book Chapter
C1 [Jasparro, Christopher] USN, War Coll, Newport, RI USA.
[Taylor, Jonathan] Calif State Univ Fullerton, Fullerton, CA 92634 USA.
RP Jasparro, C (reprint author), USN, War Coll, Newport, RI USA.
NR 68
TC 0
Z9 0
U1 0
U2 0
PU UNIV PRESS KENTUCKY
PI LEXINGTON
PA 102 LAFFERTY HALL, UNIVERSITY OF KENTUCKY, LEXINGTON, KY 40506 USA
BN 978-0-8131-2653-1
PY 2011
BP 283
EP 299
PG 17
WC Environmental Sciences; Environmental Studies; Geosciences,
Multidisciplinary
SC Environmental Sciences & Ecology; Geology
GA BAR58
UT WOS:000305292600015
ER
PT J
AU Griffiths, JM
King, DW
AF Griffiths, Jose-Marie
King, Donald W.
BE Baker, D
Evans, W
TI The future of librarians in the workforce: a US perspective
SO LIBRARIES AND SOCIETY: ROLE, RESPONSIBILITY AND FUTURE IN AN AGE OF
CHANGE
SE Chandos Information Professional Series
LA English
DT Article; Book Chapter
C1 [Griffiths, Jose-Marie; King, Donald W.] Bryant Univ, Smithfield, RI 02917 USA.
[Griffiths, Jose-Marie] Natl Sci Board, Arlington, VA USA.
[Griffiths, Jose-Marie] Presidents Informat Technol Advisory Comm, Arlington, VA USA.
[Griffiths, Jose-Marie] US Natl Commiss Lib & Informat Sci, Washington, DC USA.
[Griffiths, Jose-Marie] Natl Acad Sci, Washington, DC USA.
[Griffiths, Jose-Marie] NASA, Washington, DC USA.
[Griffiths, Jose-Marie] US DOE, Washington, DC 20560 USA.
[Griffiths, Jose-Marie] US Dept Commerce, Washington, DC 20230 USA.
[Griffiths, Jose-Marie] US Geol Survey, Reston, VA USA.
[Griffiths, Jose-Marie] USN, Washington, DC USA.
[Griffiths, Jose-Marie] Amer Assoc Advancement Sci, Washington, DC USA.
[King, Donald W.] Westat Corp, Gaithersburg, MD USA.
[King, Donald W.] Amer Stat Assoc, Alexandria, VA 22314 USA.
RP Griffiths, JM (reprint author), Bryant Univ, Smithfield, RI 02917 USA.
NR 28
TC 0
Z9 0
U1 0
U2 1
PU CHANDOS PUBL
PI SAWSTON
PA 80 HIGH ST, SAWSTON, CAMBRIDGE CB22 3HJ, ENGLAND
BN 978-1-84334-131-4
J9 CHANDOS INF PROF SER
PY 2011
BP 279
EP 302
D2 10.1533/9781780632636
PG 24
WC Information Science & Library Science
SC Information Science & Library Science
GA BYR59
UT WOS:000299894500021
ER
PT S
AU Christophersen, M
Philips, BF
AF Christophersen, Marc
Philips, Bernard F.
GP IEEE
TI Alumina, Al2O3, Layers as Effective P-Stops for Silicon Radiation
Detectors
SO 2011 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE
(NSS/MIC)
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium/Medical Imaging Conference (NSS/MIC)/18th
International Workshop on Room-Temperature Semiconductor X-Ray and
Gamma-Ray Detectors
CY OCT 23-29, 2011
CL Valencia, SPAIN
SP IEEE, Inst Elect & Elect Engineers Nucl & Plasma Sci Soc (IEEE NPSS)
AB Inter-strip shortening due to electron accumulation is a problem for any segmented p-type and double-sided n-type detectors. The standard approach for inter-strip or interpixel isolation is an implanted and annealed p-type layer, called p-stop. We show that alumina layer can be used as effective p-stops due to a negative surface charge at the silicon-alumina interface. We used ALD (atomic layer deposition) and e-beam evaporated alumina layers as inter-strip dielectrics for n-on-n strips. We fabricated a double sided strip detector (DSSD) on n-type silicon with alumina as a p-stop and tested the DSSD under gamma-ray irradiation. We compare ALD alumina layers with standard silicon oxide for isolating n-on-n strips. Equivalents to "p-stop" and "p-spray" were fabricated and evaluated with respect to their leakage currents. Finite element simulations support our experimental findings.
C1 [Christophersen, Marc; Philips, Bernard F.] USN, Res Lab, Washington, DC 20375 USA.
RP Christophersen, M (reprint author), USN, Res Lab, Code 7654, Washington, DC 20375 USA.
EM marc.christophersen@nrl.navy.mil; phlips@nrl.navy.mil
RI Christophersen, Marc/B-6795-2008
NR 6
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4673-0120-6
J9 IEEE NUCL SCI CONF R
PY 2011
BP 113
EP 117
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied; Imaging Science
& Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging
SC Engineering; Physics; Imaging Science & Photographic Technology;
Radiology, Nuclear Medicine & Medical Imaging
GA BAM64
UT WOS:000304755600021
ER
PT S
AU Wulf, EA
Hutcheson, AL
Phlips, BF
Mitchell, LJ
Leas, BE
AF Wulf, Eric A.
Hutcheson, Anthony L.
Phlips, Bernard F.
Mitchell, Lee J.
Leas, Byron E.
GP IEEE
TI Stand-Off Detection with an Active Interrogation Photon Beam
SO 2011 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE
(NSS/MIC)
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium/Medical Imaging Conference (NSS/MIC)/18th
International Workshop on Room-Temperature Semiconductor X-Ray and
Gamma-Ray Detectors
CY OCT 23-29, 2011
CL Valencia, SPAIN
SP IEEE, Inst Elect & Elect Engineers Nucl & Plasma Sci Soc (IEEE NPSS)
ID DELAYED GAMMA-RAYS; PHOTOFISSION
AB Active interrogation measurements with a bremsstrahlung photon beam were taken using a hybrid coded imaging and spectroscopic identification system developed at the Naval Research Laboratory (NRL). Measurements were taken using a bremsstrahlung photon beam produced by the Photonuclear Inspection and Threat Assessment System (PITAS) bremsstrahlung photon source at the Idaho Accelerator Center's (IAC) Pocatello Airport facility. The 3 to 7 MeV delayed gamma-ray signature for depleted uranium (DU) was observed and was not seen with a lead target. The delayed gamma-rays were localized to the position of the DU using the coded imager.
C1 [Wulf, Eric A.; Hutcheson, Anthony L.; Phlips, Bernard F.; Mitchell, Lee J.] USN, Res Lab, Washington, DC 20375 USA.
RP Wulf, EA (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM wulf@nrl.navy.mil
FU Naval Research's Maritime WMD Detection program
FX SuperMISTI and this active interrogation demonstration are sponsored by
the Office of Naval Research's Maritime WMD Detection program. The
authors gratefully acknowledge the Defense Threat Reduction Agency and
the Idaho Accelerator Center for their cooperation and use of the PITAS
accelerator
NR 8
TC 1
Z9 1
U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4673-0120-6
J9 IEEE NUCL SCI CONF R
PY 2011
BP 315
EP 318
PG 4
WC Engineering, Electrical & Electronic; Physics, Applied; Imaging Science
& Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging
SC Engineering; Physics; Imaging Science & Photographic Technology;
Radiology, Nuclear Medicine & Medical Imaging
GA BAM64
UT WOS:000304755600066
ER
PT S
AU Mitchell, LJ
Phlips, BF
Wulf, EA
Hutcheson, AL
Leas, BE
AF Mitchell, Lee J.
Phlips, Bernard F.
Wulf, Eric A.
Hutcheson, Anthony L.
Leas, Byron E.
GP IEEE
TI Cross Country Background Measurements with High Purity Germanium
SO 2011 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE
(NSS/MIC)
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium/Medical Imaging Conference (NSS/MIC)/18th
International Workshop on Room-Temperature Semiconductor X-Ray and
Gamma-Ray Detectors
CY OCT 23-29, 2011
CL Valencia, SPAIN
SP IEEE, Inst Elect & Elect Engineers Nucl & Plasma Sci Soc (IEEE NPSS)
DE Gamma-Ray Spectroscopy; High Purity Germanium Detectors; Nuclear
Detection; Homeland Security; Naturally Occurring Radioactive Materials
(NORM) Background Studies
AB Background measurements were made with twenty-eight high purity germanium detectors (HPGe) on the Mobil Imaging and Spectroscopic Threat Identification (MISTI) system across a portion of the Continental United States (CONUS). MISTI was developed by the Naval Research Laboratory(NRL) for the Domestic Nuclear Detection Office (DNDO) as part of the Stand off Radiation Detection Systems (SORDS) program. Measurements were made from Washington D. C. to Pocatello, Idaho, during the dates of Mar 25, 2011 to Mar 28, 2011. The effect of variable backgrounds on detection sensitivities will be discussed. An opportunity was also afforded to measure the radioactive materials released from Japan's Fukushima I Nuclear Plant across a significant portion of CONUS. A description of the instrument and results are discussed.
C1 [Mitchell, Lee J.; Phlips, Bernard F.; Wulf, Eric A.; Hutcheson, Anthony L.] NRL, High Energy Space Environm Branch, Code 7654, Washington, DC 20375 USA.
RP Mitchell, LJ (reprint author), NRL, High Energy Space Environm Branch, Code 7654, Washington, DC 20375 USA.
FU Naval Research
FX Manuscript received November 4, 2011. This work was supported by the
Office of Naval Research. We would like to thank the Domestic Nuclear
Detection Office for the use of MI STI.
NR 5
TC 1
Z9 1
U1 0
U2 5
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4673-0120-6
J9 IEEE NUCL SCI CONF R
PY 2011
BP 319
EP 323
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied; Imaging Science
& Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging
SC Engineering; Physics; Imaging Science & Photographic Technology;
Radiology, Nuclear Medicine & Medical Imaging
GA BAM64
UT WOS:000304755600067
ER
PT S
AU Swanekamp, SB
Young, FC
Jackson, SL
Commisso, RJ
AF Swanekamp, S. B.
Young, F. C.
Jackson, S. L.
Commisso, R. J.
GP IEEE
TI Neutron Detector Designs for Detecting Fission Neutrons in Intense
Pulsed Environments
SO 2011 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE
(NSS/MIC)
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium/Medical Imaging Conference (NSS/MIC)/18th
International Workshop on Room-Temperature Semiconductor X-Ray and
Gamma-Ray Detectors
CY OCT 23-29, 2011
CL Valencia, SPAIN
SP IEEE, Inst Elect & Elect Engineers Nucl & Plasma Sci Soc (IEEE NPSS)
ID GLASS DETECTOR; DIAGNOSTICS; PLASMA
AB In this paper, the MCNPX code is used to optimize the moderator materials and thicknesses for a neutron detector based on a Li-6-loaded glass scintillator. It is shown that the response of the Li-6 detector to a delayed-neutron-fission spectrum is comparable to a He-3-based gas proportional counter that is configured with a similar active area and moderator materials. For a delayed-neutron spectrum, a polyethylene thickness between 4 cm and 5 cm optimizes the number of Li-6(n,alpha)H-3 reactions in the glass. Furthermore, when the polyethylene is surrounded by additional thickness of 2-cm of Flexi-boron the response of the detector to neutrons with energies of 1-100 eV (where the emission of delayed fission neutrons is small) is reduced by a factor of two or more while reducing the response at the peak of the delayed spectrum by only 20-30%. The addition of this thick Flexi-boron layer can be an effective way to reduce the unwanted signals from cosmic-ray neutrons and other background sources. A good neutron detector should also be able to distinguish between high-energy gamma-rays and neutrons. In a pulsed-power environment, the bremsstrahlung from the generator can also temporarily blind the detector. Lead shielding can be used to reduce these effects so that the detector can recover fast enough to measure delayed fission neutrons. We have used MCNPX to address the effects of lead shielding on the response of the 6Li detector to delayed fission neutrons. It is found that the addition of lead has little effect on the optimum polyethylene thickness. The addition of 5-cm-thick lead (10-cm) reduces the response to the delayed neutron spectrum by about 30% (50%) while reducing the effects of 1 MeV gamma-rays by a factor of 30 (1000).
C1 [Swanekamp, S. B.; Jackson, S. L.] USN, Div Plasma Phys, Res Lab, Washington, DC 20375 USA.
RP Swanekamp, SB (reprint author), USN, Div Plasma Phys, Res Lab, Washington, DC 20375 USA.
EM Steve.Swanekamp@nrl.navy.mil; Frank.Young@nrl.navy.mil;
Stuart.Jackson@nrl.navy.mil
NR 13
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4673-0120-6
J9 IEEE NUCL SCI CONF R
PY 2011
BP 363
EP 369
PG 7
WC Engineering, Electrical & Electronic; Physics, Applied; Imaging Science
& Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging
SC Engineering; Physics; Imaging Science & Photographic Technology;
Radiology, Nuclear Medicine & Medical Imaging
GA BAM64
UT WOS:000304755600078
ER
PT S
AU Christophersen, M
Phlips, BF
Woolf, RS
Jackson, LA
AF Christophersen, Marc
Phlips, Bernard F.
Woolf, Richard S.
Jackson, Lori A.
GP IEEE
TI Micromachined Tantalum Collimators for Space Applications
SO 2011 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE
(NSS/MIC)
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium/Medical Imaging Conference (NSS/MIC)/18th
International Workshop on Room-Temperature Semiconductor X-Ray and
Gamma-Ray Detectors
CY OCT 23-29, 2011
CL Valencia, SPAIN
SP IEEE, Inst Elect & Elect Engineers Nucl & Plasma Sci Soc (IEEE NPSS)
AB We present the prototype-development of a tantalum X-ray collimator for AXTAR (Advanced X-ray Timing Array), a mission concept for an advanced X-ray timing experiment. The collimator is micro-fabricated in a two step process: (i) laser-machining of a hole array in Ta and (ii) chemical etching of the hole with the desired porosity (hole vs. bulk volume). The collimator design was studied by Monte Carlo simulation using GEANT4. The anticipated collimator performance shows 2 orders of magnitude rejection over 2 degrees. The angular response of the collimator was measured with an Americum-241 source and a commercial silicon detector. The prototype collimates over +/-3 degrees.
C1 [Christophersen, Marc; Phlips, Bernard F.] USN, Res Lab, Code 7654, Washington, DC 20375 USA.
[Woolf, Richard S.] USN, Res Lab, Washington, DC 7654 USA.
[Jackson, Lori A.] Praxis Inc, Alexandria, VA 22303 USA.
RP Christophersen, M (reprint author), USN, Res Lab, Code 7654, Washington, DC 20375 USA.
EM marc.christophersen@nrl.navy.mil; phlips@nrl.navy.mil;
richard.woolf.ctr@nrl.navy.mil; lori.jackson.ctr@nrl.navy.mil
RI Christophersen, Marc/B-6795-2008
FU ONR (Office of Navy Research)
FX This work was supported in part by the ONR (Office of Navy Research).
NR 4
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4673-0120-6
J9 IEEE NUCL SCI CONF R
PY 2011
BP 1222
EP 1225
PG 4
WC Engineering, Electrical & Electronic; Physics, Applied; Imaging Science
& Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging
SC Engineering; Physics; Imaging Science & Photographic Technology;
Radiology, Nuclear Medicine & Medical Imaging
GA BAM64
UT WOS:000304755601089
ER
PT S
AU Ferraro, MS
Mahon, R
Rabinovich, WS
Freeman, WT
Murphy, JL
Goetz, PG
Burris, HR
Moore, CI
Thomas, LM
Clark, WR
Waters, WD
AF Ferraro, Mike S.
Mahon, Rita
Rabinovich, William S.
Freeman, Wade T.
Murphy, James L.
Goetz, Peter G.
Burris, Harris R.
Moore, Christopher I.
Thomas, Linda M.
Clark, William R.
Waters, William D.
BE Majumdar, AK
Davis, CC
TI InGaAs Avalanche Photodiode Arrays for Simultaneous Communications and
Tracking
SO FREE-SPACE AND ATMOSPHERIC LASER COMMUNICATIONS XI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Free-Space and Atmospheric Laser Communications XI
CY AUG 24-25, 2011
CL San Diego, CA
SP SPIE
DE free-space laser communication; avalanche photodiode arrays; position
sensitive detector; quadrant cell
AB Free space optical communication uses photodetectors for two purposes: as communications receivers and, in the form of a quadrant cell or a position sensitive detector, for tracking. Generally two separate detectors are used. In this work we describe combining these functions into one device through the use of heterostructure avalanche photodiode (APD) arrays. Combined functionality more efficiently uses the available light and allows for large area communications detector arrays that maintain the bandwidth and sensitivity of smaller, single-element, devices. In this paper we describe a prototype 2x2 arrays and associated electronics and processing. The design tradeoffs in balancing both functions are explored and future geometries that are more effective than square arrays are described.
C1 [Ferraro, Mike S.; Mahon, Rita; Rabinovich, William S.; Murphy, James L.; Goetz, Peter G.; Burris, Harris R.; Moore, Christopher I.; Thomas, Linda M.] USN, Res Lab, Washington, DC 20375 USA.
RP Ferraro, MS (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 5
TC 2
Z9 2
U1 5
U2 8
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-8772-8
J9 PROC SPIE
PY 2011
VL 8162
AR 81620D
DI 10.1117/12.895116
PG 8
WC Engineering, Electrical & Electronic; Optics; Telecommunications
SC Engineering; Optics; Telecommunications
GA BBA74
UT WOS:000306314800011
ER
PT S
AU Mahon, R
Moore, CI
Ferraro, MS
Rabinovich, WS
Suite, MR
AF Mahon, Rita
Moore, Christopher I.
Ferraro, Mike S.
Rabinovich, William S.
Suite, Michele R.
BE Majumdar, AK
Davis, CC
TI Optical Scintillation Measurements in a Desert Environment 1: Direct
Link Ranges of 2 to 24 km
SO FREE-SPACE AND ATMOSPHERIC LASER COMMUNICATIONS XI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Free-Space and Atmospheric Laser Communications XI
CY AUG 24-25, 2011
CL San Diego, CA
SP SPIE
DE scintillation; saturated fluctuations; coherence radius
AB Experiments have been carried out over a series of ranges at China Lake in which the irradiance fluctuations, angle-of-arrival variance and images of the scintillation patterns were recorded, together with meteorological parameters. The decrease in scintillation index associated with the lower turbulence conditions at sunset was observed for the shorter ranges but not for the longer ranges of 19 and 24km where the propagation was in the saturated regime.
C1 [Mahon, Rita; Moore, Christopher I.; Ferraro, Mike S.; Rabinovich, William S.; Suite, Michele R.] USN, Res Lab, Washington, DC 20375 USA.
RP Mahon, R (reprint author), USN, Res Lab, Code 5654,4555 Overlook Ave, Washington, DC 20375 USA.
NR 6
TC 1
Z9 1
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-8772-8
J9 PROC SPIE
PY 2011
VL 8162
AR 816208
DI 10.1117/12.895223
PG 7
WC Engineering, Electrical & Electronic; Optics; Telecommunications
SC Engineering; Optics; Telecommunications
GA BBA74
UT WOS:000306314800006
ER
PT S
AU Mahon, R
Moore, CI
Ferraro, MS
Rabinovich, WS
Suite, MR
AF Mahon, Rita
Moore, Christopher I.
Ferraro, Mike S.
Rabinovich, William S.
Suite, Michele R.
BE Majumdar, AK
Davis, CC
TI Optical Scintillation Measurements in a Desert Environment 3: High speed
imaging of scintillation patterns and their application to aperture
averaging
SO FREE-SPACE AND ATMOSPHERIC LASER COMMUNICATIONS XI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Free-Space and Atmospheric Laser Communications XI
CY AUG 24-25, 2011
CL San Diego, CA
SP SPIE
DE scintillation; aperture averaging
AB The spatial scale of variations of intensity imposed on a propagating beam as it transits the turbulent atmosphere is of importance in designing free space laser communications receivers. Consecutive images of the entrance pupil of a 125mm diameter telescope have been acquired at a rate of 328fps over a series of ranges from 2km to 24km. The images are analyzed with respect to the aperture averaging available to a given receiver system.
C1 [Mahon, Rita; Moore, Christopher I.; Ferraro, Mike S.; Rabinovich, William S.; Suite, Michele R.] USN, Res Lab, Washington, DC 20375 USA.
RP Mahon, R (reprint author), USN, Res Lab, Code 5654,4555 Overlook Ave, Washington, DC 20375 USA.
NR 4
TC 1
Z9 1
U1 1
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-8772-8
J9 PROC SPIE
PY 2011
VL 8162
AR 81620A
DI 10.1117/12.895243
PG 6
WC Engineering, Electrical & Electronic; Optics; Telecommunications
SC Engineering; Optics; Telecommunications
GA BBA74
UT WOS:000306314800008
ER
PT S
AU Rabinovich, WS
Mahon, R
Moore, CI
Ferraro, MS
Suite, MR
Burris, HR
Thomas, LM
AF Rabinovich, William S.
Mahon, Rita
Moore, Christopher I.
Ferraro, Mike S.
Suite, Michele R.
Burris, H. R.
Thomas, L. M.
BE Majumdar, AK
Davis, CC
TI Optical Scintillation Measurements in a Desert Environment 2:
Retro-reflector Links
SO FREE-SPACE AND ATMOSPHERIC LASER COMMUNICATIONS XI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Free-Space and Atmospheric Laser Communications XI
CY AUG 24-25, 2011
CL San Diego, CA
SP SPIE
DE Free space optical communication; Modulating retro-reflector;
scintillation; desert
AB Transportable Atmospheric Testing Suite (TATS) system was used to measure time resolved scintillation over a variety of different ranges at China Lake in December 2010. In this paper an analysis of scintillation effects on retro-reflector links is presented. Scintillation index, power spectral density and probability distribution functions are deduced from the measured irradiance fluctuations. Effects of aperture averaging using multiple retro-reflectors is examined as well as the contribution to the irradiance fluctuations due to enhanced backscatter.
C1 [Rabinovich, William S.; Mahon, Rita; Moore, Christopher I.; Ferraro, Mike S.; Suite, Michele R.; Burris, H. R.; Thomas, L. M.] USN, Res Lab, Washington, DC 20375 USA.
RP Rabinovich, WS (reprint author), USN, Res Lab, Code 5654,4555 Overlook Ave, Washington, DC 20375 USA.
NR 9
TC 4
Z9 4
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-8772-8
J9 PROC SPIE
PY 2011
VL 8162
AR 816209
DI 10.1117/12.895240
PG 10
WC Engineering, Electrical & Electronic; Optics; Telecommunications
SC Engineering; Optics; Telecommunications
GA BBA74
UT WOS:000306314800007
ER
PT S
AU Suite, M
Rabinovich, WS
Mahon, R
Moore, C
Ferraro, M
Burris, HR
Thomas, LM
AF Suite, Michele
Rabinovich, W. S.
Mahon, Rita
Moore, Christopher
Ferraro, Mike
Burris, H. R.
Thomas, L. M.
BE Majumdar, AK
Davis, CC
TI Optical Scintillation Measurements in a Desert Environment 4: Simulated
Effects of Scintillation on Communications Links
SO FREE-SPACE AND ATMOSPHERIC LASER COMMUNICATIONS XI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Free-Space and Atmospheric Laser Communications XI
CY AUG 24-25, 2011
CL San Diego, CA
SP SPIE
DE Free space optical communication; Lasercom; Modulating retro-reflector;
Retro-modulator; fade rate; protocol; gigabit Ethernet; high bandwidth;
frequency allocation; desert; low probability of intercept; anti-jam
AB Optical scintillation is an effect that limits the performance of many optical systems including imagers and free space optical communication links. The Naval Research Laboratory is undertaking a series of measurement campaigns of optical scintillation in a variety of environments. In December of 2010 measurements were made over a one week period in the desert at China Lake, CA. The NRL TATS system was used to measure time resolved scintillation over a variety of different ranges and terrains. This data has been used to determine fade rate and duration as a function of weather and link margin. Temporal correlation of fades has also been calculated. This data allows simulation of a variety of communication protocols and the effects of those protocols on link throughput. In this paper we present a comparison of different protocols for both direct and retroreflector links
C1 [Suite, Michele; Rabinovich, W. S.; Mahon, Rita; Moore, Christopher; Ferraro, Mike; Burris, H. R.; Thomas, L. M.] USN, Res Lab, Washington, DC 20375 USA.
RP Suite, M (reprint author), USN, Res Lab, Code 8123,4555 Overlook Ave, Washington, DC 20375 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-8772-8
J9 PROC SPIE
PY 2011
VL 8162
AR 81620B
DI 10.1117/12.895244
PG 16
WC Engineering, Electrical & Electronic; Optics; Telecommunications
SC Engineering; Optics; Telecommunications
GA BBA74
UT WOS:000306314800009
ER
PT J
AU Nissen, ME
Bordetsky, A
AF Nissen, Mark E.
Bordetsky, Alex
BE Trentin, G
TI Leveraging mobile network technologies to accelerate tacit knowledge
flows across organisations and distances
SO TECHNOLOGY AND KNOWLEDGE FLOW: THE POWER OF NETWORKS
SE Chandos Information Professional Series
LA English
DT Article; Book Chapter
DE knowledge flow theory; tacit knowledge; explicit knowledge; mobile
network technologies; communities of professionals
ID DYNAMIC THEORY; FIRM
AB Knowledge is key to sustainable competitive advantage, but different kinds of knowledge affect competitive advantage differently, and they exhibit qualitatively different dynamic properties and behaviours. This pertains in particular to tacit and explicit knowledge.
Tacit knowledge is rich and powerful, enabling rapid, expert-level action in many circumstances, but it tends to be highly situated and to flow slowly and narrowly across people, organisations, places and times.
Alternatively, explicit knowledge tends to be more generally applicable and to flow broadly and rapidly, but it is diluted and less powerful than its tacit counterpart. Mobile network technologies are becoming increasingly powerful and ubiquitous, but like most information technologies, they maintain a predominant focus on explicit knowledge. In contrast, advancing capabilities to facilitate remote and multiparty collaboration offer increasing potential to support tacit knowledge flows as well.
The research described in this chapter builds upon Knowledge Flow Theory to conceptualise an approach to accelerating tacit knowledge flows through mobile network technologies, and it illustrates such an approach through field research to examine how rich, situated tacit knowledge can be induced to flow rapidly across organisations and distances. For example, mobile network technologies can enable domain experts to apply their rich tacit knowledge even across great geographical distances, as though they were collocated physically.
This chapter offers a theoretical contribution and elucidates an exciting path for continued research along these lines, and it highlights practical application as well, through demonstration of how network technologies can be leveraged to accelerate tacit knowledge flows.
C1 [Nissen, Mark E.; Bordetsky, Alex] USN, Postgrad Sch, Monterey, CA USA.
[Nissen, Mark E.] Univ So Calif, Los Angeles, CA 90089 USA.
RP Nissen, ME (reprint author), USN, Postgrad Sch, Monterey, CA USA.
NR 26
TC 0
Z9 0
U1 0
U2 0
PU CHANDOS PUBL
PI SAWSTON
PA 80 HIGH ST, SAWSTON, CAMBRIDGE CB22 3HJ, ENGLAND
BN 978-1-84334-646-3
J9 CHANDOS INF PROF SER
PY 2011
BP 1
EP 25
D2 10.1533/9781780632674
PG 25
WC Information Science & Library Science; Management
SC Information Science & Library Science; Business & Economics
GA BZD86
UT WOS:000301196500002
ER
PT B
AU Szabat, KA
O'Connor, A
Tavana, M
AF Szabat, Kathryn A.
O'Connor, Aidan
Tavana, Madjid
BA Tavana, M
BF Tavana, M
TI Managing Adaptability, Intervention, and People in Enterprise
Information Systems Preface
SO MANAGING ADAPTABILITY, INTERVENTION, AND PEOPLE IN ENTERPRISE
INFORMATION SYSTEMS
LA English
DT Editorial Material; Book Chapter
C1 [Szabat, Kathryn A.; Tavana, Madjid] La Salle Univ, Dept Management, Philadelphia, PA 19141 USA.
[O'Connor, Aidan] Ecole Super Commerce & Management, Paris, France.
[Tavana, Madjid] Management Informat Syst & Decis Sci, Philadelphia, PA USA.
[Tavana, Madjid] La Salle Univ, Ctr Technol & Management, Philadelphia, PA USA.
[Tavana, Madjid] Kennedy Space Ctr, Kennedy Space Ctr, FL USA.
[Tavana, Madjid] Johnson Space Ctr, Houston, TX USA.
[Tavana, Madjid] Naval Res Lab, Washington, DC USA.
[Tavana, Madjid] Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
[Tavana, Madjid] AF Res Lab, Wright Patterson AFB, OH USA.
RP Szabat, KA (reprint author), La Salle Univ, Dept Management, Philadelphia, PA 19141 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IGI GLOBAL
PI HERSEY
PA 701 E CHOCOLATE AVE, STE 200, HERSEY, PA 17033-1240 USA
BN 978-1-60960-530-8; 978-1-60960-529-2
PY 2011
BP XII
EP +
D2 10.4018/978-1-60960-529-2
PG 39
WC Business; Management
SC Business & Economics
GA BZV42
UT WOS:000303059500001
ER
PT S
AU Dermer, CD
AF Dermer, Charles D.
CA Fermi LAT Collaboration
BE Romero, GE
Sunyaev, RA
Belloni, TM
TI Blazar jet physics in the age of Fermi
SO JETS AT ALL SCALES
SE IAU Symposium Proceedings Series
LA English
DT Proceedings Paper
CT 275th Symposium of the International-Astronomical-Union on Jets at All
Scales
CY SEP 13-17, 2010
CL Buenos Aires, ARGENTINA
SP IAU Div 10, IAU Div 11, Inst Argentino Radioastronomia
DE galaxies: jets; gamma rays: observations; gamma rays: theory
ID LARGE-AREA TELESCOPE; ACTIVE GALACTIC NUCLEI; GAMMA-RAY ABSORPTION;
RADIO GALAXY; 3C 454.3; CATALOG; ACCELERATION; UNIFICATION; EMISSION;
SPECTRUM
AB The impact of the Fermi Gamma-ray Space Telescope on blazar research is reviewed. This includes a brief description of the Fermi Large Area Telescope, a summary of the various classes of extragalactic sources found in the First Large Area Telescope AGN Catalog, and more detailed discussion of the fiat spectrum radio quasar 3C454.3 and the BL Lac object PKS 2155-304. Some theoretical studies related to ongoing blazar research with Fermi are mentioned, including implications of gamma-ray observations of radio galaxies on blazar unification scenarios, variability in colliding shells, and whether blazars are sources of ultra-high energy cosmic rays.
C1 [Dermer, Charles D.] USN, Res Lab, Washington, DC 20375 USA.
RP Dermer, CD (reprint author), USN, Res Lab, Code 7653,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM charles.dermer@nrl.navy.mil
NR 48
TC 0
Z9 0
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
SN 1743-9213
BN 978-0-52176-607-4
J9 IAU SYMP P SERIES
JI IAU Symposium Proc. Series
PY 2011
VL 275
BP 111
EP 121
DI 10.1017/S1743921310015772
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BAP08
UT WOS:000304974800020
ER
PT J
AU Byram, S
Hackman, C
Tracey, J
AF Byram, Sharyl
Hackman, Christine
Tracey, Jeffrey
GP ION
TI Computation of a High-Precision GPS-Based Troposphere Product by the
USNO
SO PROCEEDINGS OF THE 24TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE
DIVISION OF THE INSTITUTE OF NAVIGATION (ION GNSS 2011)
LA English
DT Proceedings Paper
CT 24th International Technical Meeting of the Satellite Division of the
Institute of Navigation (ION GNSS)
CY SEP 20-23, 2010
CL Portland, OR
SP Inst Navigat, Satellite Div
ID PATH DELAY
AB In addition to contributing to the IGS ultra rapid and rapid GPS products, the USNO Analysis Center (AC) has undertaken the task of computing the high-precision IGS final troposphere product, expanding its GPS product family in July 2011. A precise point position (PPP) estimation of the zenith path delay (ZPD) and the North and East gradient components is performed using the Bernese GPS Version 5.0 software [4]. In an effort to measure the quality of the final troposphere product produced by the USNO with this setup, a test was performed by processing 18 IGS reference stations and comparing the result to the final troposphere product published by the IGS over a time span of 25 days. The zenith path delay estimates in comparison to the IGS product seem to agree overall with most of the stations averaging less than 3 mm in standard deviation with an average mean near 1 mm for the 25 day period. The gradient component estimates show more variability in the standard deviation from station to station, however the average mean is near zero.
A station position repeatability test for a portion of this same comparison testing period was also performed in an effort to determine the internal quality of the USNO products. The test analyzed a 14 day period (days 058-071 in 2011) with the results shown in Table 2. These repeatability values demonstrate a good internal consistency for the 18 stations analyzed. Overall the repeatability for the North the East coordinates was on average near 2 mm while the Up coordinate has a repeatability of approximately 5 mm. Ongoing station repeatability checks are done in blocks of 10 days for USNO produced IGS final troposphere products.
C1 [Byram, Sharyl; Hackman, Christine; Tracey, Jeffrey] USN Observ, GPS Anal Div, Earth Orientat Dept, Washington, DC USA.
RP Byram, S (reprint author), USN Observ, GPS Anal Div, Earth Orientat Dept, Washington, DC USA.
NR 6
TC 5
Z9 5
U1 0
U2 2
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2011
BP 572
EP 578
PG 7
WC Computer Science, Hardware & Architecture; Telecommunications
SC Computer Science; Telecommunications
GA BAF73
UT WOS:000304032000037
ER
PT B
AU Livingston, MA
Rosenblum, LJ
Brown, DG
Schmidt, GS
Julier, SJ
Baillot, Y
Swan, JE
Ai, ZM
Maassel, P
AF Livingston, Mark A.
Rosenblum, Lawrence J.
Brown, Dennis G.
Schmidt, Gregory S.
Julier, Simon J.
Baillot, Yohan
Swan, J. Edward, II
Ai, Zhuming
Maassel, Paul
BE Furht, B
TI Military Applications of Augmented Reality
SO HANDBOOK OF AUGMENTED REALITY
LA English
DT Article; Book Chapter
AB This chapter reviews military benefits and requirements that have led to a series of research efforts in augmented reality (AR) and related systems for the military over the past few decades, beginning with the earliest specific application of AR. While by no means a complete list, we note some themes from the various projects and discuss ongoing research at the Naval Research Laboratory. Two of the most important thrusts within these applications are the user interface and human factors. We summarize our research and place it in the context of the field.
C1 [Livingston, Mark A.; Rosenblum, Lawrence J.; Brown, Dennis G.; Schmidt, Gregory S.; Julier, Simon J.; Baillot, Yohan; Swan, J. Edward, II; Ai, Zhuming; Maassel, Paul] USN, Res Lab, Washington, DC 20375 USA.
RP Livingston, MA (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM mark.livingston@nrl.navy.mil
NR 59
TC 5
Z9 5
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4614-0063-9
PY 2011
BP 671
EP 706
DI 10.1007/978-1-4614-0064-6_31
D2 10.1007/978-1-4614-0064-6
PG 36
WC Computer Science, Cybernetics; Imaging Science & Photographic Technology
SC Computer Science; Imaging Science & Photographic Technology
GA BYW48
UT WOS:000300642100031
ER
PT B
AU Moniz, LJ
Nichols, JD
Nichols, JM
Cooch, EG
Pecora, LM
AF Moniz, L. J.
Nichols, J. D.
Nichols, J. M.
Cooch, E. G.
Pecora, L. M.
BE Dehmer, M
EmmertStreib, F
Mehler, A
TI Inferences About Coupling from Ecological Surveillance Monitoring:
Approaches Based on Nonlinear Dynamics and Information Theory
SO TOWARDS AN INFORMATION THEORY OF COMPLEX NETWORKS: STATISTICAL METHODS
AND APPLICATIONS
LA English
DT Article; Book Chapter
DE 37M10 Time-Series Analysis; 37M99 Computational Methods; 37N99
Application of Dynamical Systems; 92D40 Ecology
ID RECURRENCE QUANTIFICATION ANALYSIS; TIME-SERIES ANALYSIS;
POPULATION-DYNAMICS; SPATIOTEMPORAL SYSTEMS; STRANGE ATTRACTORS; MUTUAL
PREDICTION; DELAY EMBEDDINGS; FORCED SYSTEMS; NOISY WORLD; MODELS
AB Some monitoring programs for ecological resources are developed as components of larger science or management programs and are thus guided by a priori hypotheses. More commonly, ecological monitoring programs are initiated for the purpose of surveillance with no a priori hypotheses in mind. No conceptual framework currently exists to guide the development of surveillance monitoring programs, resulting in substantial debate about program design. We view surveillance monitoring programs as providing information about system dynamics and focus on methods for extracting such information from time series of monitoring data. We briefly describe methods from the general field of nonlinear dynamics that we believe may be useful in extracting information about system dynamics. In looking at the system as a network of locations or components, we emphasize methods for assessing coupling between system components for use in understanding system dynamics and interactions and in detecting changes in system dynamics. More specifically, these methods hold promise for such ecological problems as identifying indicator species, developing informative spatial monitoring designs, detecting ecosystem change and damage, and investigating such topics as population synchrony, species interactions, and environmental drivers. We believe that these ideas and methods provide a useful conceptual framework for surveillance monitoring and can be used with model systems to draw inferences about the design of surveillance monitoring programs. In addition, some of the current methods should be useful with some actual ecological monitoring data, and methodological extensions and modifications should increase the applicability of these approaches to additional sources of actual ecological data.
C1 [Moniz, L. J.] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA.
[Nichols, J. D.] US Geol Survey, Patuxent Wildlife Res Ctr, Laurel, MD 20708 USA.
[Nichols, J. M.] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
[Cooch, E. G.] Cornell Univ, Dept Nat Resources, Ithaca, NY 14853 USA.
RP Moniz, LJ (reprint author), Johns Hopkins Univ, Appl Phys Lab, 11100 Johns Hopkins Rd, Laurel, MD 20723 USA.
EM Linda.Moniz@jhuapl.edu; jnichols@usgs.gov;
jonathan.nichols@nrl.navy.mil; evan.cooch@cornell.edu;
pecora@anvil.nrl.navy.mil
NR 105
TC 0
Z9 0
U1 0
U2 5
PU BIRKHAUSER BOSTON
PI CAMBRIDGE
PA 675 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139-2333 USA
BN 978-0-8176-4903-6
PY 2011
BP 169
EP 198
DI 10.1007/978-0-8176-4904-3_8
D2 10.1007/978-0-8176-4904-3
PG 30
WC Computer Science, Theory & Methods; Statistics & Probability
SC Computer Science; Mathematics
GA BYL98
UT WOS:000299298200008
ER
PT B
AU Wu, ST
Wang, AH
Wu, CC
Hill, F
Hernandez, IG
Feng, XS
Dryer, M
AF Wu, S. T.
Wang, A. H.
Wu, Chin-Chun
Hill, F.
Hernandez, I. Gonzalez
Feng, X. S.
Dryer, M.
BE Pogorelov, NV
Audit, E
Zank, GP
TI A Global Solar Wind Model Based on Surface Measurements of Magnetic
Field and Transverse Velocity from GONG
SO NUMERICAL MODELING OF SPACE PLASMA FLOWS - ASTRONUM 2010
SE Astronomical Society of the Pacific Conference Series
LA English
DT Proceedings Paper
CT 5th Annual International Conference on Numerical Modeling of Space
Plasma Flows (ASTRONUM 2010)
CY JUN 13-18, 2010
CL San Diego, CA
ID CONSERVATION-LAWS; EVOLUTION; MHD; FORMULATION; SCHEMES; CORONA; SPEED
AB We present a solar wind model based on a three-dimensional (3D) data-driven, time-dependent, magnetohydrodynamic (MHD) model. The inputs to the model are the measured line-of-sight (LOS) magnetic field of SOLIS and transverse velocity from the Global Oscillation Network Group (GONG) on the lower boundary without heating and momentum additions. The results show that both slow and fast components of the solar wind are produced without arbitrarily specifying additional heating and momentum due to the employment of multiple sets of observations. In addition, the global distribution of the coronal holes responsible for the formation of co-rotating interaction regions (CIRs) is also consistently presented.
C1 [Wu, S. T.; Wang, A. H.; Dryer, M.] Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35899 USA.
[Wu, Chin-Chun] Naval Res Lab, Washington, DC 20375 USA.
[Hill, F.; Hernandez, I. Gonzalez] Natl Opt Astron Observ, Tucson, AZ 85719 USA.
[Feng, X. S.] Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100080, Peoples R China.
[Wu, S. T.] Univ Alabama Huntsville, Dept Mech & Aerosp Engn, Huntsville, AL 35899 USA.
RP Wu, ST (reprint author), Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35899 USA.
NR 28
TC 1
Z9 1
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-768-1
J9 ASTR SOC P
PY 2011
VL 444
BP 143
EP +
PG 2
WC Astronomy & Astrophysics; Mathematics, Applied
SC Astronomy & Astrophysics; Mathematics
GA BAH66
UT WOS:000304180200023
ER
PT J
AU Aguilar, CO
Krener, AJ
AF Aguilar, Cesar O.
Krener, Arthur J.
GP IEEE
TI Power series solutions to the time-varying dynamic programming equations
SO 2011 50TH IEEE CONFERENCE ON DECISION AND CONTROL AND EUROPEAN CONTROL
CONFERENCE (CDC-ECC)
LA English
DT Proceedings Paper
CT 50th IEEE Conference of Decision and Control (CDC)/European Control
Conference (ECC)
CY DEC 12-15, 2011
CL Orlando, FL
SP Honeywell, MathWorks, United Technol Res Ctr, HYCON2, IEEE, Contrl Syst Soc (CSS), EUCA
ID SYSTEMS
AB In this paper we construct high-order approximate solutions to the value function and optimal control for a finite-horizon optimal control problem for time-varying discrete-time nonlinear systems. The method consists in expanding the dynamic programming equations (DPE) in a power series, collecting homogeneous polynomial terms and solving for the unknown coefficients from the known and previously computed data. The resulting high-order equations are linear difference equations for the unknown homogeneous terms and are solved backwards in time. The method is applied to construct high-order perturbation controllers around a nominal optimal trajectory.
C1 [Aguilar, Cesar O.; Krener, Arthur J.] USN, Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
RP Aguilar, CO (reprint author), USN, Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
EM coaguila@nps.edu; ajkrener@nps.edu
FU AFOSR; NSF
FX Research supported in part by AFOSR and NSF
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-61284-801-3
PY 2011
BP 397
EP 402
PG 6
WC Automation & Control Systems
SC Automation & Control Systems
GA BAA55
UT WOS:000303506200065
ER
PT J
AU Galloway, KS
Justh, EW
Krishnaprasad, PS
AF Galloway, K. S.
Justh, E. W.
Krishnaprasad, P. S.
GP IEEE
TI Portraits of cyclic pursuit
SO 2011 50TH IEEE CONFERENCE ON DECISION AND CONTROL AND EUROPEAN CONTROL
CONFERENCE (CDC-ECC)
LA English
DT Proceedings Paper
CT 50th IEEE Conference of Decision and Control (CDC)/European Control
Conference (ECC)
CY DEC 12-15, 2011
CL Orlando, FL
SP Honeywell, MathWorks, United Technol Res Ctr, HYCON2, IEEE, Contrl Syst Soc (CSS), EUCA
AB The study of cyclic pursuit as a means to collective behavior in nature and in artificial multi-agent systems is of current interest. Here we examine the nonlinear closed loop dynamics of planar cyclic pursuit based on the constant bearing (CB) strategy. We show that there exists a family of rectilinear relative equilibria that admit nearby periodic orbits in an appropriate low dimensional space found by methods of symmetry, reduction and constraint. We also demonstrate the existence of other families of rectilinear equilibria that exhibit attractivity or instability.
C1 [Galloway, K. S.; Krishnaprasad, P. S.] Univ Maryland, Syst Res Inst, College Pk, MD 20742 USA.
[Justh, E. W.] Naval Res Lab, Washington, DC 20375 USA.
RP Galloway, KS (reprint author), Univ Maryland, Syst Res Inst, College Pk, MD 20742 USA.
EM kgallow1@umd.edu; krishna@umd.edu
FU Air Force Office of Scientific Research under AFOS [FA95501010250];
ODDRE MURI2007 [N000140710734]; Office of Naval Research
FX This research was supported in part by the Air Force Office of
Scientific Research under AFOSR grant FA95501010250; by an L-3
Communications Graduate Fellowship; by the ODDR&E MURI2007 Program Grant
N000140710734 (through the Office of Naval Research); and by the Office
of Naval Research
NR 11
TC 8
Z9 8
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-61284-801-3
PY 2011
BP 2724
EP 2731
PG 8
WC Automation & Control Systems
SC Automation & Control Systems
GA BAA55
UT WOS:000303506203054
ER
PT J
AU Klaus, C
Chung, TH
AF Klaus, Christian
Chung, Timothy H.
GP IEEE
TI Optimized Graph Topologies for Probabilistic Search
SO 2011 50TH IEEE CONFERENCE ON DECISION AND CONTROL AND EUROPEAN CONTROL
CONFERENCE (CDC-ECC)
LA English
DT Proceedings Paper
CT 50th IEEE Conference of Decision and Control (CDC)/European Control
Conference (ECC)
CY DEC 12-15, 2011
CL Orlando, FL
SP Honeywell, MathWorks, United Technol Res Ctr, HYCON2, IEEE, Contrl Syst Soc (CSS), EUCA
ID ALGEBRAIC CONNECTIVITY
AB This paper investigates the effect on the performance of a mobile searcher caused by altering the search environment. We model the search environment as a simple connected undirected graph. By adding non-existing edges to the graph we change the search environment's model. Our objective is to optimize search performance, that is, to minimize the (expected) time needed to find the target, in the context of probabilistic search. We first analyze two different methods to generate random connected graphs, then evaluate a number of methods to augment a graph by means of the algebraic connectivity of the graph and its associated (Fiedler) eigenvector. The relationship between the graph topology and the performance of the search is highlighted, including a comparative evaluation of different search strategies employed by the mobile searcher. Extensive simulation studies and resulting statistical and theoretical models show that adding a few wisely chosen edges to a sparse graph is sufficient to dramatically increase search performance. Further, we propose a novel method for incorporating prior information about the target's likely location by defining a subgraph on which the presented approach is performed, resulting in even greater improvements in search performance.
C1 [Klaus, Christian] Naval Post Grad Sch, Dept Operat Res, Monterey, CA 93943 USA.
[Chung, Timothy H.] Naval Post Grad Sch, Dept Syst Engn, Monterey, CA USA.
RP Klaus, C (reprint author), Naval Post Grad Sch, Dept Operat Res, Monterey, CA 93943 USA.
EM cklaus@nps.edu; thchung@nps.edu
NR 19
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-61284-801-3
PY 2011
BP 2913
EP 2919
PG 7
WC Automation & Control Systems
SC Automation & Control Systems
GA BAA55
UT WOS:000303506203084
ER
PT J
AU Li, CD
Park, C
Pattipati, KR
Kleinman, DL
AF Li, Chendong
Park, Chulwoo
Pattipati, Krishna R.
Kleinman, David L.
GP IEEE
TI Distributed Algorithms for Biobjective Assignment Problems
SO 2011 50TH IEEE CONFERENCE ON DECISION AND CONTROL AND EUROPEAN CONTROL
CONFERENCE (CDC-ECC)
LA English
DT Proceedings Paper
CT 50th IEEE Conference of Decision and Control (CDC)/European Control
Conference (ECC)
CY DEC 12-15, 2011
CL Orlando, FL
SP Honeywell, MathWorks, United Technol Res Ctr, HYCON2, IEEE, Contrl Syst Soc (CSS), EUCA
AB In this paper, we study the biobjective assignment problem, a NP-hard version of the classical assignment problem. We employ an effective two-phase method with certain enhancements: in Phase I, we use a distributed auction algorithm to solve the single objective assignment problems to obtain the so-called supported Pareto optimal solutions; we apply a ranking approach with tight upper/lower bounds in Phase II to obtain the non-supported Pareto optimal solutions. Moreover, a randomized algorithm for Phase II is proposed that supports finding the approximation on a polynomial time basis. Extensive experiments are conducted using SGI Altix 3700 and computational results are reported based on a large set of randomly generated problem instances. Also, some experimental results of the distributed auction algorithm on large data-size assignment problems are provided.
C1 [Li, Chendong] Univ Connecticut, Comp Sci Engn Dept, Storrs, CT 06029 USA.
[Kleinman, David L.] Naval Postgrad Sch, Dept Informat Sci, Monterey, CA 93943 USA.
RP Li, CD (reprint author), Univ Connecticut, Comp Sci Engn Dept, Storrs, CT 06029 USA.
EM chendong.li@engr.uconn.edu; chp06004@engr.uconn.edu;
krishna@engr.uconn.edu; dlkleinm@nps.edu
FU U.S. Office of Naval Research [N00014-09-1-0062]
FX This work was supported by the U.S. Office of Naval Research under Grant
N00014-09-1-0062
NR 46
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-61284-801-3
PY 2011
BP 5893
EP 5898
PG 6
WC Automation & Control Systems
SC Automation & Control Systems
GA BAA55
UT WOS:000303506206084
ER
PT S
AU Karpenko, M
Bedrossian, N
Bhatt, S
Fleming, A
Ross, IM
AF Karpenko, M.
Bedrossian, N.
Bhatt, S.
Fleming, A.
Ross, I. M.
BE Jah, MK
Guo, YP
Bowes, AL
Lai, PC
TI FIRST FLIGHT RESULTS ON TIME-OPTIMAL SPACECRAFT SLEWS
SO SPACEFLIGHT MECHANICS 2011, PTS I-III
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 21st AAS/AIAA Space Flight Mechanics Meeting
CY FEB 13-17, 2011
CL New Orleans, LA
SP AAS, AIAA
ID RIGID SPACECRAFT; REORIENTATION; MANEUVERS
AB This paper describes the design and flight implementation of off-eigenaxis time-optimal reorientation maneuvers for the NASA Transition Region and Coronal Explorer (TRACE) spacecraft. Time-optimal reorientation maneuvers have obvious application for improving the maneuver performance of spacecraft systems. Yet, this type of maneuvering capability has never before been demonstrated in flight. Constrained time-optimal maneuvering of a rigid body is studied first in order to demonstrate the potential for enhancing the performance of the TRACE spacecraft. Issues related to the experimental flight implementation of time-optimal maneuvers on board TRACE are discussed. A description of an optimal control problem formulation found to be suitable for reaction wheel spacecraft maneuver design is given. The optimization model is solved using the pseudospectral optimal control method and includes practical constraints such as the nonlinear reaction wheel torque-momentum envelope and rate gyro saturation limits. Flight results, presented for a typical large angle time-optimal reorientation maneuver, show that time-optimal maneuvers can be implemented without any modification of the existing spacecraft attitude control system and demonstrate a clear improvement in spacecraft maneuver performance as compared to conventional eigenaxis maneuvering.
C1 [Karpenko, M.; Ross, I. M.] USN, Postgrad Sch, Dept Mech & Aerosp Engn, Monterey, CA 93943 USA.
RP Karpenko, M (reprint author), USN, Postgrad Sch, Dept Mech & Aerosp Engn, Monterey, CA 93943 USA.
NR 22
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-569-5
J9 ADV ASTRONAUT SCI
PY 2011
VL 140
BP 111
EP 126
PN 1-3
PG 16
WC Engineering, Aerospace
SC Engineering
GA BAC15
UT WOS:000303779600008
ER
PT S
AU Colon, MA
Sankaranarayanan, S
AF Colon, Michael A.
Sankaranarayanan, Sriram
BE Barthe, G
TI Generalizing the Template Polyhedral Domain
SO PROGRAMMING LANGUAGES AND SYSTEMS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 20th European Symposium on Programming (ESOP)
CY MAR 26-APR 03, 2011
CL Saarbrucken, GERMANY
ID NUMERICAL ABSTRACT DOMAINS; STATIC ANALYSIS; ITERATION; SYSTEMS;
SOFTWARE; LIBRARY
AB Template polyhedra generalize weakly relational domains by specifying arbitrary fixed linear expressions on the left-hand sides of inequalities and undetermined constants on the right. The domain operations required for analysis over template polyhedra can be computed in polynomial time using linear programming. In this paper, we introduce the generalized template polyhedral domain that extends template polyhedra using fixed left-hand side expressions with bilinear forms involving program variables and unknown parameters to the right. We prove that the domain operations over generalized templates can be defined as the "best possible abstractions" of the corresponding polyhedral domain operations. The resulting analysis can straddle the entire space of linear relation analysis starting from the template domain to the full polyhedral domain.
We show that analysis in the generalized template domain can be performed by dualizing the join, post-condition and widening operations. We also investigate the special case of template polyhedra wherein each bilinear form has at most two parameters. For this domain, we use the special properties of two dimensional polyhedra and techniques from fractional linear programming to derive domain operations that can be implemented in polynomial time over the number of variables in the program and the size of the polyhedra. We present applications of generalized template polyhedra to strengthen previously obtained invariants by converting them into templates. We describe an experimental evaluation of an implementation over several benchmark systems.
C1 [Colon, Michael A.] USN, Res Lab, Washington, DC 20375 USA.
[Sankaranarayanan, Sriram] Univ Colorado, Boulder, CO USA.
RP Colon, MA (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM colon@itd.nrl.navy.mil; srirams@colorado.edu
FU National Science Foundation (NSF) [0953941]; Office of Naval Research
(ONR)
FX This material is based upon work supported by the National Science
Foundation (NSF) under Grant No. 0953941 and the Office of Naval
Research (ONR). Any opinions, findings, and conclusions or
recommendations expressed in this material are those of the author(s)
and do not necessarily reflect the views of NSF or ONR.
NR 38
TC 7
Z9 7
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-642-19717-8
J9 LECT NOTES COMPUT SC
PY 2011
VL 6602
BP 176
EP +
PG 3
WC Computer Science, Software Engineering; Computer Science, Theory &
Methods
SC Computer Science
GA BAC37
UT WOS:000303792300010
ER
PT B
AU Joyner, D
Kim, JL
AF Joyner, David
Kim, Jon-Lark
BA Joyner, D
Kim, JL
BF Joyner, D
Kim, JL
TI Background on Information Theory and Coding Theory
SO SELECTED UNSOLVED PROBLEMS IN CODING THEORY
SE Applied and Numerical Harmonic Analysis
LA English
DT Article; Book Chapter
C1 [Joyner, David] USN Acad, Dept Math, Annapolis, MD 21402 USA.
[Kim, Jon-Lark] Univ Louisville, Dept Math, Louisville, KY 40292 USA.
RP Joyner, D (reprint author), USN Acad, Dept Math, Chauvenet Hall,Holloway Rd 572C, Annapolis, MD 21402 USA.
EM wdjoyner@gmail.com; jl.kim@louisville.edu; wdjoyner@gmail.com;
jl.kim@louisville.edu
NR 0
TC 0
Z9 0
U1 1
U2 1
PU BIRKHAUSER BOSTON
PI CAMBRIDGE
PA 675 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139-2333 USA
BN 978-0-8176-8255-2
J9 APPL NUMER HARMON AN
PY 2011
BP 1
EP +
DI 10.1007/978-0-8176-8256-9_1
D2 10.1007/978-0-8176-8256-9
PG 36
WC Mathematics
SC Mathematics
GA BYR72
UT WOS:000299905100001
ER
PT B
AU Joyner, D
Kim, JL
AF Joyner, David
Kim, Jon-Lark
BA Joyner, D
Kim, JL
BF Joyner, D
Kim, JL
TI Self-dual Codes, Lattices, and Invariant Theory
SO SELECTED UNSOLVED PROBLEMS IN CODING THEORY
SE Applied and Numerical Harmonic Analysis
LA English
DT Article; Book Chapter
C1 [Joyner, David] USN Acad, Dept Math, Annapolis, MD 21402 USA.
[Kim, Jon-Lark] Univ Louisville, Dept Math, Louisville, KY 40292 USA.
RP Joyner, D (reprint author), USN Acad, Dept Math, Chauvenet Hall,Holloway Rd 572C, Annapolis, MD 21402 USA.
EM wdjoyner@gmail.com; jl.kim@louisville.edu; wdjoyner@gmail.com;
jl.kim@louisville.edu
NR 0
TC 0
Z9 0
U1 1
U2 1
PU BIRKHAUSER BOSTON
PI CAMBRIDGE
PA 675 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139-2333 USA
BN 978-0-8176-8255-2
J9 APPL NUMER HARMON AN
PY 2011
BP 29
EP 46
DI 10.1007/978-0-8176-8256-9_2
D2 10.1007/978-0-8176-8256-9
PG 18
WC Mathematics
SC Mathematics
GA BYR72
UT WOS:000299905100002
ER
PT B
AU Joyner, D
Kim, JL
AF Joyner, David
Kim, Jon-Lark
BA Joyner, D
Kim, JL
BF Joyner, D
Kim, JL
TI Kittens, Mathematical Blackjack, and Combinatorial Codes
SO SELECTED UNSOLVED PROBLEMS IN CODING THEORY
SE Applied and Numerical Harmonic Analysis
LA English
DT Article; Book Chapter
C1 [Joyner, David] USN Acad, Dept Math, Annapolis, MD 21402 USA.
[Kim, Jon-Lark] Univ Louisville, Dept Math, Louisville, KY 40292 USA.
RP Joyner, D (reprint author), USN Acad, Dept Math, Chauvenet Hall,Holloway Rd 572C, Annapolis, MD 21402 USA.
EM wdjoyner@gmail.com; jl.kim@louisville.edu; wdjoyner@gmail.com;
jl.kim@louisville.edu
NR 0
TC 0
Z9 0
U1 1
U2 1
PU BIRKHAUSER BOSTON
PI CAMBRIDGE
PA 675 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139-2333 USA
BN 978-0-8176-8255-2
J9 APPL NUMER HARMON AN
PY 2011
BP 47
EP 70
DI 10.1007/978-0-8176-8256-9_3
D2 10.1007/978-0-8176-8256-9
PG 24
WC Mathematics
SC Mathematics
GA BYR72
UT WOS:000299905100003
ER
PT B
AU Joyner, D
Kim, JL
AF Joyner, David
Kim, Jon-Lark
BA Joyner, D
Kim, JL
BF Joyner, D
Kim, JL
TI The Riemann Hypothesis and Coding Theory
SO SELECTED UNSOLVED PROBLEMS IN CODING THEORY
SE Applied and Numerical Harmonic Analysis
LA English
DT Article; Book Chapter
C1 [Joyner, David] USN Acad, Dept Math, Annapolis, MD 21402 USA.
[Kim, Jon-Lark] Univ Louisville, Dept Math, Louisville, KY 40292 USA.
RP Joyner, D (reprint author), USN Acad, Dept Math, Chauvenet Hall,Holloway Rd 572C, Annapolis, MD 21402 USA.
EM wdjoyner@gmail.com; jl.kim@louisville.edu; wdjoyner@gmail.com;
jl.kim@louisville.edu
NR 0
TC 0
Z9 0
U1 1
U2 1
PU BIRKHAUSER BOSTON
PI CAMBRIDGE
PA 675 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139-2333 USA
BN 978-0-8176-8255-2
J9 APPL NUMER HARMON AN
PY 2011
BP 71
EP 121
DI 10.1007/978-0-8176-8256-9_4
D2 10.1007/978-0-8176-8256-9
PG 51
WC Mathematics
SC Mathematics
GA BYR72
UT WOS:000299905100004
ER
PT B
AU Joyner, D
Kim, JL
AF Joyner, David
Kim, Jon-Lark
BA Joyner, D
Kim, JL
BF Joyner, D
Kim, JL
TI Hyperelliptic Curves and Quadratic Residue Codes
SO SELECTED UNSOLVED PROBLEMS IN CODING THEORY
SE Applied and Numerical Harmonic Analysis
LA English
DT Article; Book Chapter
C1 [Joyner, David] USN Acad, Dept Math, Annapolis, MD 21402 USA.
[Kim, Jon-Lark] Univ Louisville, Dept Math, Louisville, KY 40292 USA.
RP Joyner, D (reprint author), USN Acad, Dept Math, Chauvenet Hall,Holloway Rd 572C, Annapolis, MD 21402 USA.
EM wdjoyner@gmail.com; jl.kim@louisville.edu; wdjoyner@gmail.com;
jl.kim@louisville.edu
NR 0
TC 0
Z9 0
U1 1
U2 1
PU BIRKHAUSER BOSTON
PI CAMBRIDGE
PA 675 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139-2333 USA
BN 978-0-8176-8255-2
J9 APPL NUMER HARMON AN
PY 2011
BP 123
EP 143
DI 10.1007/978-0-8176-8256-9_5
D2 10.1007/978-0-8176-8256-9
PG 21
WC Mathematics
SC Mathematics
GA BYR72
UT WOS:000299905100005
ER
PT B
AU Joyner, D
Kim, JL
AF Joyner, David
Kim, Jon-Lark
BA Joyner, D
Kim, JL
BF Joyner, D
Kim, JL
TI Codes from Modular Curves
SO SELECTED UNSOLVED PROBLEMS IN CODING THEORY
SE Applied and Numerical Harmonic Analysis
LA English
DT Article; Book Chapter
C1 [Joyner, David] USN Acad, Dept Math, Annapolis, MD 21402 USA.
[Kim, Jon-Lark] Univ Louisville, Dept Math, Louisville, KY 40292 USA.
RP Joyner, D (reprint author), USN Acad, Dept Math, Chauvenet Hall,Holloway Rd 572C, Annapolis, MD 21402 USA.
EM wdjoyner@gmail.com; jl.kim@louisville.edu; wdjoyner@gmail.com;
jl.kim@louisville.edu
NR 0
TC 0
Z9 0
U1 1
U2 1
PU BIRKHAUSER BOSTON
PI CAMBRIDGE
PA 675 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139-2333 USA
BN 978-0-8176-8255-2
J9 APPL NUMER HARMON AN
PY 2011
BP 145
EP 176
DI 10.1007/978-0-8176-8256-9_6
D2 10.1007/978-0-8176-8256-9
PG 32
WC Mathematics
SC Mathematics
GA BYR72
UT WOS:000299905100006
ER
PT B
AU Joyner, D
Kim, JL
AF Joyner, David
Kim, Jon-Lark
BA Joyner, D
Kim, JL
BF Joyner, D
Kim, JL
TI Appendices
SO SELECTED UNSOLVED PROBLEMS IN CODING THEORY
SE Applied and Numerical Harmonic Analysis
LA English
DT Article; Book Chapter
C1 [Joyner, David] USN Acad, Dept Math, Annapolis, MD 21402 USA.
[Kim, Jon-Lark] Univ Louisville, Dept Math, Louisville, KY 40292 USA.
RP Joyner, D (reprint author), USN Acad, Dept Math, Chauvenet Hall,Holloway Rd 572C, Annapolis, MD 21402 USA.
EM wdjoyner@gmail.com; jl.kim@louisville.edu; wdjoyner@gmail.com;
jl.kim@louisville.edu
NR 0
TC 0
Z9 0
U1 1
U2 1
PU BIRKHAUSER BOSTON
PI CAMBRIDGE
PA 675 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139-2333 USA
BN 978-0-8176-8255-2
J9 APPL NUMER HARMON AN
PY 2011
BP 177
EP 188
DI 10.1007/978-0-8176-8256-9_7
D2 10.1007/978-0-8176-8256-9
PG 12
WC Mathematics
SC Mathematics
GA BYR72
UT WOS:000299905100007
ER
PT S
AU Dermer, CD
AF Dermer, Charles D.
BE McEnery, JE
Racusin, JL
Gehrels, N
TI Are Gamma-Ray Bursts the Sources of the Ultra-High Energy Cosmic Rays?
SO GAMMA RAY BURSTS 2010
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT Conference of the Gamma Ray Bursts
CY NOV 01-04, 2010
CL Annapolis, MD
DE Gamma-ray bursts; blazars; ultra-high energy cosmic rays
ID ACCELERATION; LUMINOSITY; NUCLEI; FERMI; ERA
AB A checklist of criteria is presented to help establish the sources of ultra-high energy cosmic rays (UHECRs). These criteria are applied to long-duration GRBs in order to determine if they are UHECR sources. The evidence seems to favor blazars and radio galaxies (or other sources) over GRBs.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Dermer, CD (reprint author), USN, Res Lab, Code 7653,4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 29
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0916-3
J9 AIP CONF PROC
PY 2011
VL 1358
DI 10.1063/1.3621804
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BZU09
UT WOS:000302963100079
ER
PT S
AU Yee, SC
Anderson, CR
Charles, HK
Firebaugh, SL
Mechtel, DM
AF Yee, Steven C.
Anderson, Christopher R.
Charles, Harry K.
Firebaugh, Samara L.
Mechtel, Deborah M.
GP IEEE
TI Microstrip Antenna Tuning using Variable Reactive Microelectromechanical
Systems
SO 2011 IEEE 61ST ELECTRONIC COMPONENTS AND TECHNOLOGY CONFERENCE (ECTC)
SE Electronic Components and Technology Conference
LA English
DT Proceedings Paper
CT IEEE 61st Electronic Components and Technology Conference (ECTC)
CY MAY 31-JUN 03, 2011
CL Lake Buena Vista, FL
SP IEEE, IEEE Components, Packaging & Mfg Technol Soc (CPMT)
AB Due to their small size, low loss, and compatibility with integrated circuits, microelectromechanical systems (MEMS) have been the focus of recent efforts at developing frequency reconfigurable patch antennas able to operate at a number of different user-selected frequencies. Although reactive loading with MEMS variable capacitors is a well-documented method in reconfigurable antenna design [1], MEMS variable inductors have not received the same attention in that role. Designs for frequency tunable patch antennas using MEMS variable inductors and capacitors are presented here. Variations on previous thermally actuated MEMS variable inductors [2] and electrostatically actuated MEMS variable capacitors fabricated through a multi-user surface micromachining process are tested and shown to successfully vary reactance when actuated. Microstrip-fed patch antennas loaded with discrete surface-mount reactive components were successfully tested to demonstrate the principle of this MEMS application.
C1 [Yee, Steven C.; Anderson, Christopher R.; Charles, Harry K.; Firebaugh, Samara L.; Mechtel, Deborah M.] USN Acad, Annapolis, MD 21401 USA.
RP Yee, SC (reprint author), USN Acad, Annapolis, MD 21401 USA.
NR 5
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0569-5503
BN 978-1-61284-498-5
J9 ELEC COMP C
PY 2011
BP 1828
EP 1833
PG 6
WC Engineering, Electrical & Electronic
SC Engineering
GA BZP73
UT WOS:000302341400281
ER
PT J
AU Garzarella, A
Wu, DH
AF Garzarella, Anthony
Wu, Dong Ho
GP IEEE
TI Non Intrusive Electromagnetic Sensors for Ultra Wideband Applications
Using Electro-Optic and Magneto-Optic Materials
SO 2011 IEEE INTERNATIONAL CONFERENCE ON ULTRA-WIDEBAND (ICUWB)
LA English
DT Proceedings Paper
CT IEEE International Conference on Ultra-Wideband (ICUWB)
CY SEP 14-16, 2011
CL Bologna, ITALY
SP IEEE
AB We have developed and tested fiber optic electric and magnetic field sensors for ultra wideband (UWB) applications. The sensors are based on nonlinear effects in electro-optic (EO) and magneto-optic (MO) crystals. Unlike conventional antenna-based probes, EO and MO sensors are composed of all-dielectric materials and do not perturb the very fields that they measure. The sensors are small in size (less than 5mm in diameter), allowing them to be used in confined spaces and can be used with over 50 meters of optical fibers. These features make the sensor very well-suited for UWB applications and attractive for potential commercial use.
C1 [Garzarella, Anthony; Wu, Dong Ho] USN, Res Lab, Washington, DC 20375 USA.
RP Garzarella, A (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM tony.garzarella@nrl.navy.mil
NR 2
TC 1
Z9 1
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4577-1764-2
PY 2011
BP 240
EP 242
PG 3
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BZR09
UT WOS:000302462400051
ER
PT S
AU Vanhoy, JR
Guardala, NA
Glass, GA
AF Vanhoy, J. R.
Guardala, N. A.
Glass, G. A.
BE McDaniel, FD
Doyle, BL
TI Directed Neutron Beams From Inverse Kinematic Reactions
SO APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY: TWENTY-FIRST
INTERNATIONAL CONFERENCE
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 21st International Conference on Application of Accelerators in Research
and Industry (CAARI)
CY AUG 08-13, 2010
CL Ft Worth, TX
SP Univ N Texas, Sandia Natl Labs, Los Alamos Natl Lab, AccSys Technol Inc, High Voltage Engn Europa BV, Natl Electrostat Corp, TDK-Lambda Amer
DE Neutron beam; Heavy Ion Reactions; Directed Beams; Inverse Kinematics
ID DEUTERATED POLYETHYLENE TARGETS; EMISSION COMPUTED-TOMOGRAPHY;
DECOMPOSITION
AB Kinematic focusing of an emitted fairly mono-energetic neutron beam by the use of inverse-kinematic reactions, i.e. where the projectile mass is greater than the target atom's mass, can provide for the utilization of a significant fraction of the fast neutron yield and also provide for a safer radiation environment. We examine the merit of various neutron production reactions and consider the practicalities of producing the primary beam using the suitable accelerator technologies. Preliminary progress at the NSWC-Carderock Positive Ion Accelerator Facility is described. Possible important applications for this type of neutron-based system can be both advanced medical imaging techniques and active "stand-off" interrogation of contraband items.
C1 [Vanhoy, J. R.] USN Acad, Dept Phys, 572C Holloway Rd, Annapolis, MD 21402 USA.
[Guardala, N. A.] NSWC, Carderock Div, Positive Ion Accelerator Facil, Bethesda, MD 20817 USA.
[Glass, G. A.] Univ Louisiana Lafayette, Louisiana Accelerator Ctr, Dept Phys, Lafayette, LA 70504 USA.
RP Vanhoy, JR (reprint author), USN Acad, Dept Phys, 572C Holloway Rd, Annapolis, MD 21402 USA.
FU Internal Research Investment of the Naval Surface Warfare Center; Office
of Naval Research
FX This work was funded in part by the Internal Research Investment of the
Naval Surface Warfare Center, and the Office of Naval Research.
NR 25
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0891-3
J9 AIP CONF PROC
PY 2011
VL 1336
BP 463
EP 468
DI 10.1063/1.3586142
PG 6
WC Physics, Applied
SC Physics
GA BZT55
UT WOS:000302912900096
ER
PT S
AU Hicks, SF
Kersting, LJ
Lueck, CJ
McDonough, P
Crider, BP
McEllistrem, MT
Peters, EE
Vanhoy, JR
AF Hicks, S. F.
Kersting, L. J.
Lueck, C. J.
McDonough, P.
Crider, B. P.
McEllistrem, M. T.
Peters, E. E.
Vanhoy, J. R.
BE McDaniel, FD
Doyle, BL
TI Undergraduate Measurements For Fission Reactor Applications
SO APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY: TWENTY-FIRST
INTERNATIONAL CONFERENCE
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 21st International Conference on Application of Accelerators in Research
and Industry (CAARI)
CY AUG 08-13, 2010
CL Ft Worth, TX
SP Univ N Texas, Sandia Natl Labs, Los Alamos Natl Lab, AccSys Technol Inc, High Voltage Engn Europa BV, Natl Electrostat Corp, TDK-Lambda Amer
DE Undergraduate research; neutron spectroscopy; elastic and inelastic
neutron scattering differential cross sections
AB Undergraduate students at the University of Dallas (UD) have investigated elastic and inelastic neutron scattering cross sections on structural materials important for criticality considerations in nuclear fission processes. Neutrons scattered off of Na-23 and Fe-Nat were detected using neutron time-of-flight techniques at the University of Kentucky Low-Energy Nuclear Accelerator Facility. These measurements are part of an effort to increase the efficiency of power generation from existing fission reactors in the US and in the design of new fission systems. Students have learned the basics of how to operate the Model CN Van de Graaff generator at the laboratory, setup detectors and electronics, use data acquisition systems, and they are currently analyzing the angular dependence of the scattered neutrons for incident neutron energies of 3.57 and 3.80 MeV. Most students participating in the project will use the research experience as the material for their undergraduate research thesis required for all Bachelor of Science students at the University of Dallas. The first student projects on this topic were completed during the summer of 2010; an overview of student participation in this investigation and their preliminary results will be presented.
C1 [Hicks, S. F.; Kersting, L. J.; Lueck, C. J.; McDonough, P.] Univ Dallas, Dept Phys, Irving, TX 75019 USA.
[Crider, B. P.; McEllistrem, M. T.; Peters, E. E.] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
[Vanhoy, J. R.] US Naval Acad, Dept Phys, Annapolis, MD 21402 USA.
RP Hicks, SF (reprint author), Univ Dallas, Dept Phys, Irving, TX 75019 USA.
FU Department of Energy through the NEUP; Cowan Physics Fund at the
University of Dallas
FX This work was supported in part by the Department of Energy through the
NEUP program and by the Cowan Physics Fund at the University of Dallas.
We acknowledge with appreciation the contributions of Harvey Baber the
UK accelerator engineer and UK Professor Steven W. Yates for his many
contributions to this project.
NR 4
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0891-3
J9 AIP CONF PROC
PY 2011
VL 1336
BP 738
EP 741
DI 10.1063/1.3586200
PG 4
WC Physics, Applied
SC Physics
GA BZT55
UT WOS:000302912900154
ER
PT S
AU Correll, FD
Edsall, DW
DePooter, KA
Maskell, ND
Vanhoy, JR
AF Correll, Francis D.
Edsall, Douglas W.
DePooter, Katherine A.
Maskell, Nicholas D.
Vanhoy, Jeffrey R.
BE McDaniel, FD
Doyle, BL
TI An Apparatus For Student Projects Using External-Beam PIXE And PIGE
SO APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY: TWENTY-FIRST
INTERNATIONAL CONFERENCE
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 21st International Conference on Application of Accelerators in Research
and Industry (CAARI)
CY AUG 08-13, 2010
CL Ft Worth, TX
SP Univ N Texas, Sandia Natl Lab, Los Alamos Natl Labs, AccSys Technol Inc, High Voltage Engn Europa BV, Natl Electrostat Corp, TDK-Lambda Amer
DE student projects; external-beam; PIXE; PIGE; archaeometry; cultural
heritage
AB We recently installed a simple endstation at the Naval Academy Tandem Accelerator Laboratory to support student projects using external-beam PIXE and PIGE. It consists of a short, graphite-lined beamline extension with a thin window, an interlocked box that surrounds the target, detectors for x-and gamma rays, provision for flooding the target with helium gas, easily changed x-ray absorbers, and a compact video camera for monitoring the position of the beam spot. We used this system to measure the elemental composition of colonial-era architectural materials, principally bricks and mortar, from James Madison's Montpelier, the reconstructed Virginia estate of the fourth President of the United States. We describe the design and construction of the system, relate some of our experiences using it, and present some preliminary data from our investigations.
C1 [Correll, Francis D.; Edsall, Douglas W.; DePooter, Katherine A.; Maskell, Nicholas D.; Vanhoy, Jeffrey R.] USN Acad, Dept Phys, Annapolis, MD 21402 USA.
RP Correll, FD (reprint author), USN Acad, Dept Phys, 572C Holloway Rd, Annapolis, MD 21402 USA.
NR 5
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0891-3
J9 AIP CONF PROC
PY 2011
VL 1336
BP 758
EP 762
DI 10.1063/1.3586205
PG 5
WC Physics, Applied
SC Physics
GA BZT55
UT WOS:000302912900159
ER
PT J
AU Coy, L
Eckermann, SD
Hoppel, KW
Sassi, F
AF Coy, L.
Eckermann, S. D.
Hoppel, K. W.
Sassi, F.
TI Mesospheric Precursors to the Major Stratospheric Sudden Warming of
2009: Validation and Dynamical Attribution Using a
Ground-to-Edge-of-Space Data Assimilation System
SO JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
LA English
DT Article
AB Global meteorological analyses from an assimilation of operational and research observations spanning the similar to 0-90 km altitude range confirm earlier tentative suggestions that high-altitude winds throughout the upper mesosphere reversed a week before the major stratospheric sudden warming (SSW) of January 2009. Analyzed winds reveal descent of mean easterlies from the upper mesosphere to the lower stratosphere, followed by more easterly winds throughout the Arctic troposphere in the weeks after the SSW, indicating that these descending Northern Annular Mode (NAM) anomalies reached the surface. Eliassen-Palm fluxes reveal that the mesospheric precursor to this event was driven by transient nonstationary wave-2 planetary waves that propagated rapidly from the troposphere into the upper mesosphere, where they dissipated and produced easterly mean-flow accelerations. This early SSW phase was characterized by both descending mesospheric easterlies and poleward expansion of subtropical stratospheric easterlies, which eventually merged in the extratropical upper stratosphere. These wind structures may in turn have focused transient wave-2 planetary wave activity emerging from the troposphere in ways that intensified the SSW.
C1 [Coy, L.; Eckermann, S. D.; Sassi, F.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Hoppel, K. W.] USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
RP Coy, L (reprint author), USN, Div Space Sci, Res Lab, Code 7646,4555 Overlook Ave, Washington, DC 20375 USA.
EM lawrence.coy@nrl.navy.mil
FU NASA [NNH09AK64I]; Office of Naval Research
FX This research was supported by NASA's Heliophysics Guest Investigator
Program (award NNH09AK64I), the Office of Naval Research, and a grant of
computer time from the DoD High Performance Computing Modernization
Program at the Navy DoD Supercomputing Resource Center.
NR 12
TC 23
Z9 23
U1 0
U2 9
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 1942-2466
J9 J ADV MODEL EARTH SY
JI J. Adv. Model. Earth Syst.
PY 2011
VL 3
AR M10002
DI 10.1029/2011MS000067
PG 7
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 931EM
UT WOS:000303198400010
ER
PT J
AU vanZanten, MC
Stevens, B
Nuijens, L
Siebesma, AP
Ackerman, AS
Burnet, F
Cheng, A
Couvreux, F
Jiang, H
Khairoutdinov, M
Kogan, Y
Lewellen, DC
Mechem, D
Nakamura, K
Noda, A
Shipway, BJ
Slawinska, J
Wang, S
Wyszogrodzki, A
AF vanZanten, Margreet C.
Stevens, Bjorn
Nuijens, Louise
Siebesma, A. Pier
Ackerman, A. S.
Burnet, F.
Cheng, A.
Couvreux, F.
Jiang, H.
Khairoutdinov, M.
Kogan, Y.
Lewellen, D. C.
Mechem, D.
Nakamura, K.
Noda, A.
Shipway, B. J.
Slawinska, J.
Wang, S.
Wyszogrodzki, A.
TI Controls on precipitation and cloudiness in simulations of trade-wind
cumulus as observed during RICO
SO JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
LA English
DT Article
ID LARGE-EDDY SIMULATIONS; MARINE BOUNDARY-LAYER; SHALLOW CUMULUS; CLOUDS;
PARAMETERIZATION; CONVECTION; STRATOCUMULUS; MODEL; MICROPHYSICS; RADAR
AB Twelve large-eddy simulations, with a wide range of microphysical representations, are compared to each other and to independent measurements. The measurements and the initial and forcing data for the simulations are taken from the undisturbed period of the Rain in Cumulus over the Ocean (RICO) field study. A regional downscaling of meteorological analyses is performed so as to provide forcing data consistent with the measurements. The ensemble average of the simulations plausibly reproduces many features of the observed clouds, including the vertical structure of cloud fraction, profiles of cloud and rain water, and to a lesser degree the population density of rain drops. The simulations do show considerable departures from one another in the representation of the cloud microphysical structure and the ensuant surface precipitation rates, increasingly so for the more simplified microphysical models. There is a robust tendency for simulations that develop rain to produce a shallower, somewhat more stable cloud layer. Relations between cloud cover and precipitation are ambiguous.
C1 [Stevens, Bjorn; Nuijens, Louise] Max Planck Inst Meteorol, D-20146 Hamburg, Germany.
[vanZanten, Margreet C.; Siebesma, A. Pier] Royal Netherlands Meteorol Inst KNMI De Bilt, De Bilt, Netherlands.
[Stevens, Bjorn; Nuijens, Louise] Univ Calif Los Angeles, Dept Atmos & Ocean Sci, Los Angeles, CA USA.
[Siebesma, A. Pier] Delft Univ Technol, Dept Multiscale Phys, Delft, Netherlands.
[Ackerman, A. S.] NASA, Goddard Inst Space Studies, New York, NY 10025 USA.
[Burnet, F.; Couvreux, F.] Meteo France, CNRS, GAME, Toulouse, France.
[Cheng, A.] SSAI Inc, Langley Res Ctr, Washington, DC USA.
[Jiang, H.] Colorado State Univ, CIRA, Ft Collins, CO 80523 USA.
[Khairoutdinov, M.] SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY USA.
[Kogan, Y.] Univ Oklahoma, Cooperat Inst Mesoscale Meteorol Studies, Norman, OK 73019 USA.
[Lewellen, D. C.] W Virginia Univ, Dept Mech & Aero Engn, Morgantown, WV 26506 USA.
[Mechem, D.] Univ Kansas, Dept Geog, Lawrence, KS 66045 USA.
[Shipway, B. J.] Met Off, Exeter, Devon, England.
[Slawinska, J.] Univ Warsaw, Inst Geophys, Warsaw, Poland.
[Wang, S.] USN, Res Lab, Monterey, CA USA.
[Wyszogrodzki, A.] Res Applicat Lab, NCAR, Boulder, CO USA.
RP Stevens, B (reprint author), Max Planck Inst Meteorol, Bundesstr 53, D-20146 Hamburg, Germany.
EM bjorn.stevens@zmaw.de
RI Couvreux, Fleur/B-3996-2010; Ackerman, Andrew/D-4433-2012; Stevens,
Bjorn/A-1757-2013; Shipway, Ben/E-1375-2011; Jiang, Hongli/N-3281-2014
OI Ackerman, Andrew/0000-0003-0254-6253; Stevens,
Bjorn/0000-0003-3795-0475; Shipway, Ben/0000-0002-7419-0789;
FU Netherlands Organisation for Scientific Research (NWO) [857.00.007]
FX We thank all of those who participated in RICO and helped collect and
prepare the data that made this study possible, in particular Robert
Rauber and Larry Di Girolamo are thanked for the discussions that helped
frame the present study. The Goddard Institute for Space Studies is
thanked for hosting an initial workshop to help organize the
intercomparison. Computing resources for ASA were provided by the NASA
High-End Computing Program through the NASA Advanced Supercomputing
Division at Ames Research Center. MvZ would like to acknowledge the
financial support of Grant 857.00.007 of the Netherlands Organisation
for Scientific Research (NWO). Brian Medeiros and Chiara Antoniazzi are
thanked for help in preparing some of the analysis of lidar data. Peter
Bogenschutz, Christopher S. Bretherton, Wojciech Grabowski and Steve
Krueger are thanked for their contributions to the discussion of the
case study, Irina Sandu and Wojciech Grabowski are thanked for comments
on a draft version of this manuscript. Three constructive and thoughtful
reviews greatly improved the manuscript.
NR 46
TC 96
Z9 96
U1 3
U2 21
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 1942-2466
J9 J ADV MODEL EARTH SY
JI J. Adv. Model. Earth Syst.
PY 2011
VL 3
AR M06001
DI 10.1029/2011MS000056
PG 19
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 931EM
UT WOS:000303198400003
ER
PT S
AU Gould, RW
McCarthy, SC
Shulman, I
Coelho, E
Richman, J
AF Gould, Richard W., Jr.
McCarthy, Sean C.
Shulman, Igor
Coelho, Emanuel
Richman, James
BE Bostater, CR
Mertikas, SP
Neyt, X
VelezReyes, M
TI Estimating uncertainties in bio-optical products derived from satellite
ocean color imagery using an ensemble approach
SO REMOTE SENSING OF THE OCEAN, SEA ICE, COASTAL WATERS, AND LARGE WATER
REGIONS 2011
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and
Large Water Regions
CY SEP 21-22, 2011
CL Prague, CZECH REPUBLIC
SP SPIE
DE remote sensing; bio-optics; ocean color; error analysis; uncertainties;
ensembles; forecasting
AB We propose a methodology to quantify errors and produce uncertainty maps for satellite-derived ocean color bio-optical products using ensemble simulations. Ensemble techniques have been used by the environmental numerical modeling community to propagate initialization, forcing, and algorithm error sources through-out the full simulation process, but similar approaches have not yet been applied to satellite optical properties. Uncertainties in retrievals of bio-optical properties from satellite ocean color imagery are related to a variety of factors, including sensor calibration, atmospheric correction, and the bio-optical inversion algorithms. Errors propagate, amplify, and intertwine along the processing path, so it is important to understand how the errors cascade through each step of the analysis, to assess their impact and identify the main factors contributing to the uncertainties in the final products. Also, we are interested in producing short-term forecasts of the bio-optical property distributions, by coupling the satellite imagery with physical circulation models. So, in addition to the uncertainties in the satellite-derived bio-optical properties due to the above-mentioned factors, the uncertainties in the model currents used to advect the bio-optical properties add another layer of complexity to the problem. We outline these processes and present preliminary results for this approach.
C1 [Gould, Richard W., Jr.; McCarthy, Sean C.; Shulman, Igor; Richman, James] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Gould, RW (reprint author), USN, Res Lab, Code 7331, Stennis Space Ctr, MS 39529 USA.
EM Richard.Gould@nrlssc.navy.mil
NR 16
TC 3
Z9 3
U1 1
U2 5
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-802-2
J9 PROC SPIE
PY 2011
VL 8175
AR 817506
DI 10.1117/12.897614
PG 10
WC Remote Sensing; Optics; Imaging Science & Photographic Technology
SC Remote Sensing; Optics; Imaging Science & Photographic Technology
GA BZS31
UT WOS:000302739200006
ER
PT S
AU Myrabo, LN
Lyons, PW
Jones, RA
Liu, S
Manka, C
AF Myrabo, L. N.
Lyons, P. W.
Jones, R. A.
Liu, S.
Manka, C.
BE Eckel, HA
Scharring, S
TI Airbreathing Laser Propulsion Experiments with 1 mu m Terawatt Pharos
III Laser: Part 1
SO BEAMED ENERGY PROPULSION: SEVENTH INTERNATIONAL SYMPOSIUM
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 7th International Symposium on Beamed Energy Propulsion (ISBEP)
CY APR 10-14, 2011
CL Ludwigsburg, GERMANY
SP German Aerosp Ctr
DE Lasers; Lightcraft; Laser propulsion
ID MERCURY LIGHTCRAFT; INTEGRATION; ENGINE
AB This basic research study examines the physics of airbreathing laser propulsion at the extreme flux range of 1-2x10(11) W/cm(2) - within the air breakdown threshold for 1 mu m radiation - using the terawatt PHAROS III neodymium-glass pulsed laser. Six different experimental setups were tested using a 34 mm line focus with 66 mu m focal waist, positioned near the flat impulse surface. The first campaign investigated impulse generation with the beam oriented almost normal to the target surface, with energies ranging from 23 to 376 J, and pulses of 5 to 30 ns FWHM. Air breakdown/ plasma dynamics were diagnosed with GOI cameras and color photography. Laser generated impulse was quantified with both vertical pendulums and piezoelectric pressure transducers using the standard performance metric, C-M - the momentum coupling coefficient. Part 1 of this 2-part paper covers Campaign #1 results including laser plasma diagnostics, pressure gage and vertical pendulum data.
C1 [Myrabo, L. N.; Lyons, P. W.; Jones, R. A.; Liu, S.] Rensselaer Polytech Inst, Dept Mech Aerosp & Nucl Engn, Troy, NY 12180 USA.
[Manka, C.] Naval Res Lab, Space Plasma Branch, Washington, DC USA.
RP Myrabo, LN (reprint author), Rensselaer Polytech Inst, Dept Mech Aerosp & Nucl Engn, Troy, NY 12180 USA.
FU former Laser Propulsion Program of the SDIO (through LLNL); NASA Glenn
Research Center; NASA/USRA Advanced Design Program
FX The authors wish to acknowledge Dr. Barry Ripin and the Naval Research
Laboratory (Space Plasma Branch) for granting two weeks of test time on
the terawatt PHAROS III laser facility. Much thanks is due to
W. Mielke, E. Muzzey, D. Messitt, S. Mullady, and the RPI Central
Machine Shop for help in fabricating custom LP test equipment. A special
thank you is owed to H.T. Nagamatsu (now deceased) for his thoughtful
guidance, insight, and help in designing test equipment and evaluating
pressure data. The present research was co-sponsored under grants from
the former Laser Propulsion Program of the SDIO (through LLNL), NASA
Glenn Research Center (formerly NASA Lewis), and the NASA/USRA
Advanced Design Program.
NR 14
TC 1
Z9 1
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0974-3
J9 AIP CONF PROC
PY 2011
VL 1402
DI 10.1063/1.3657026
PG 20
WC Physics, Applied
SC Physics
GA BZL58
UT WOS:000301940500015
ER
PT S
AU Bewley, WW
Kim, CS
Kim, M
Merritt, CD
Canedy, CL
Vurgaftman, I
Abell, J
Meyer, JR
AF Bewley, W. W.
Kim, C. S.
Kim, M.
Merritt, C. D.
Canedy, C. L.
Vurgaftman, I.
Abell, J.
Meyer, J. R.
BE Khodaparast, GA
Santos, MB
Stanton, CJ
TI A New Generation of Interband Cascade Lasers
SO 15TH INTERNATIONAL CONFERENCE ON NARROW GAP SYSTEMS (NGS15)
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 15th International Conference on Narrow Gap Systems (NGS)
CY AUG 01-05, 2011
CL Campus Virginia Tech, Blacksburg, VA
SP Virginia Tech, Bradley Dept Elect & Comp Engn, Dept Phys, Virginia Tech, Advance VT, Coll Sci, Dept Mat Sci & Engn, Virginia Tech, Off Vice President Res, Virginia Tech, Inst Crit Technol & Appl Sci (ICTAS), Univ Oklahoma, Coll Engn, BAE Syst, Coherent Inc, Oxford Instruments, Janis Res, Wiley, Cryo Industries, Nikon Instruments, STAIB Instruments, Pearson Educ, Amer Elements
HO Campus Virginia Tech
DE Interband cascade laser; diode laser; infrared laser; antimonide III-V
materials
AB We report on recent antimonide-based type-II interband cascade lasers emitting at wavelengths from 3 mu m to 5.5 mu m, which display pulsed threshold current densities at 300 K as low as 170 A/cm(2). Narrow ridge devices yield CW operation to 109 degrees C. Up to 158 mW of cw power and up to 13.5 % wallplug efficiency are observed at room temperature..
C1 [Bewley, W. W.; Kim, C. S.; Kim, M.; Merritt, C. D.; Canedy, C. L.; Vurgaftman, I.; Abell, J.; Meyer, J. R.] USN, Res Lab, Washington, DC 20375 USA.
RP Bewley, WW (reprint author), USN, Res Lab, Code 5613, Washington, DC 20375 USA.
EM jerry.meyer@nrl.navy.mil
NR 5
TC 0
Z9 0
U1 1
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0993-4
J9 AIP CONF PROC
PY 2011
VL 1416
BP 46
EP 48
DI 10.1063/1.3671694
PG 3
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BZC63
UT WOS:000301110800010
ER
PT S
AU Shay, LK
Jaimes, B
Brewster, JK
Meyers, P
McCaskill, EC
Uhlhorn, E
Marks, F
Halliwell, GR
Smedstad, OM
Hogan, P
AF Shay, Lynn K.
Jaimes, Benjamin
Brewster, Jodi K.
Meyers, Patrick
McCaskill, E. Claire
Uhlhorn, Eric
Marks, Frank
Halliwell, George R., Jr.
Smedstad, Ole Martin
Hogan, Patrick
BE Liu, Y
MacFadyen, A
Ji, ZG
Weisberg, RH
TI Airborne Ocean Surveys of the Loop Current Complex From NOAA WP-3D in
Support of the Deepwater Horizon Oil Spill
SO MONITORING AND MODELING THE DEEPWATER HORIZON OIL SPILL: A
RECORD-BREAKING ENTERPRISE
SE Geophysical Monograph Series
LA English
DT Article; Book Chapter
ID GULF-OF-MEXICO; EQUIVALENT POTENTIAL TEMPERATURE; VERTICAL COORDINATE;
ANTICYCLONIC RINGS; CYCLONIC EDDIES; HURRICANE-OPAL; MODEL HYCOM;
PROPAGATION; VARIABILITY; COMPUTATION
AB At the time of the Deepwater Horizon oil rig explosion, the Loop Current (LC), a warm ocean current in the Gulf of Mexico (GoM), extended to 27.5 degrees N just south of the rig. To measure the regional scale variability of the LC, oceanographic missions were flown on a NOAA WP-3D research aircraft to obtain ocean structural data during the spill and provide thermal structure profiles to ocean forecasters aiding in the oil spill disaster at 7 to 10 day intervals. The aircraft flew nine grid patterns over the eastern GoM between May and July 2010 deploying profilers to measure atmospheric and oceanic properties such as wind, humidity, temperature, salinity, and current. Ocean current profilers sampled as deep as 1500 m, conductivity, temperature, and depth profilers sampled to 1000 m, and bathythermographs sampled to either 350 or 800 m providing deep structural measurements. Profiler data were provided to modeling centers to predict possible trajectories of the oil and vector ships to regions of anomalous signals. In hindcast mode, assimilation of temperature profiles into the Hybrid Coordinate Ocean Model improved the fidelity of the simulations by reducing RMS errors by as much as 30% and decreasing model biases by half relative to the simulated thermal structure from models that assimilated only satellite data. The synoptic snapshots also provided insight into the evolving LC variability, captured the shedding of the warm core eddy Franklin, and measured the small-scale cyclones along the LC periphery.
C1 [Shay, Lynn K.; Jaimes, Benjamin; Brewster, Jodi K.; Meyers, Patrick; McCaskill, E. Claire] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Meteorol & Phys Oceanog, Miami, FL 33149 USA.
[Halliwell, George R., Jr.] NOAA, Atlantic Oceanog & Meteorol Lab, Phys Oceanog Div, Miami, FL 33149 USA.
[Hogan, Patrick] USN, Res Lab, Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
[Uhlhorn, Eric; Marks, Frank] NOAA, Atlantic Oceanog & Meteorol Lab, Hurricane Res Div, Miami, FL 33149 USA.
[Smedstad, Ole Martin] QinetiQ N Amer, Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
RP Shay, LK (reprint author), Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Meteorol & Phys Oceanog, 4600 Rickenbacker Causeway, Miami, FL 33149 USA.
EM nshay@rsmas.miami.edu
RI Uhlhorn, Eric/B-1336-2014; Halliwell, George/B-3046-2011; Marks,
Frank/A-5733-2011;
OI Uhlhorn, Eric/0000-0002-4759-5342; Halliwell,
George/0000-0003-4216-070X; Marks, Frank/0000-0003-0371-5514; Jaimes,
Benjamin/0000-0002-5286-0972
NR 49
TC 14
Z9 14
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0065-8448
BN 978-0-87590-485-6
J9 GEOPHYS MONOGR SER
PY 2011
VL 195
BP 131
EP 151
DI 10.1029/2011GM001101
D2 10.1029/GM195
PG 21
WC Geochemistry & Geophysics; Environmental Sciences
SC Geochemistry & Geophysics; Environmental Sciences & Ecology
GA BYW60
UT WOS:000300646700013
ER
PT S
AU Ancona, MG
Binari, SC
Meyer, D
AF Ancona, M. G.
Binari, S. C.
Meyer, D.
BA Wetzel, C
Khan, A
BF Wetzel, C
Khan, A
TI Fully-coupled electromechanical analysis of stress-related failure in
GaN HEMTs
SO PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 8,
NO 7-8
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT International Workshop on Nitride Semiconductors (IWN)/Fall Meeting of
the European-Materials-Research-Society (E-MRS)/Symposium N/Symposium H
CY SEP 19-24, 2010
CL Tampa, FL
SP European Mat Res Soc (EMRS)
DE GaN; HEMT; electromechanics; stress; piezoelectric; reliability
ID TRANSISTORS
AB A multi-dimensional model for simulating the electromechanics of GaN HEMTs under bias is presented and illustrated. The model's equations are those of linear electroelasticity and diffusion-drift transport with full coupling of all variables included. The important benefit of not being restricted to one-dimension is that these simulations capture various field/stress concentrations that occur especially near corners. To illustrate the simulation tool, we discuss the potential importance of electron injection, the inverse piezoelectric effect, and SiN intrinsic stress in triggering electrical and mechanical failure. Among other things, we argue that stress concentration makes it likely that cracks, once initiated, will propagate and fracture the AlGaN barrier. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Ancona, M. G.; Binari, S. C.; Meyer, D.] USN, Res Lab, Washington, DC 20375 USA.
RP Ancona, MG (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM ancona@estd.nrl.navy.mil
NR 8
TC 1
Z9 1
U1 1
U2 7
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2011
VL 8
IS 7-8
DI 10.1002/pssc.201001056
PG 3
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
Condensed Matter
SC Materials Science; Physics
GA BZG94
UT WOS:000301581500085
ER
PT S
AU Deen, D
Storm, D
Meyer, D
Katzer, DS
Bass, R
Binari, S
Gougousi, T
AF Deen, David
Storm, David
Meyer, David
Katzer, D. Scott
Bass, Robert
Binari, Steven
Gougousi, Theodosia
BA Wetzel, C
Khan, A
BF Wetzel, C
Khan, A
TI AlN/GaN HEMTs with high-kappa ALD HfO2 or Ta2O5 gate insulation
SO PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 8,
NO 7-8
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT International Workshop on Nitride Semiconductors (IWN)/Fall Meeting of
the European-Materials-Research-Society (E-MRS)/Symposium N/Symposium H
CY SEP 19-24, 2010
CL Tampa, FL
SP European Mat Res Soc (EMRS)
DE HEMT; atomic layer deposition; Ta2O5; HfO2
AB AlN/GaN Metal-Insulator-Semiconductor High Electron Mobility Transistors (HEMTs) have been grown and fabricated which utilize a 6 nm thick atomic layer deposited film of either Ta2O5 or HfO2 for gate insulation. Drain, transfer, and gate current characteristics are compared between both structures, showing a measurable difference in threshold voltage and transconductance. The cause is highlighted by the results of capacitance-voltage analysis which showed 10 MHz dielectric constants of 8.7 and 11.7 for the HfO2 and Ta2O5 films, respectively. Furthermore, interface trap state density was extracted by Terman's method and compared between films. HEMT small signal frequency performance was representative of the different sub-micron gate lengths. Consideration of the compared electrical results suggests that at this stage in ALD development, Ta2O5 appears better suited for gate insulation of AlN/GaN HEMTs. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Deen, David; Storm, David; Meyer, David; Katzer, D. Scott; Bass, Robert; Binari, Steven] USN, Res Lab, Div Elect Sci & Technol, 4555 Overlook Ave, Washington, DC 20375 USA.
[Gougousi, Theodosia] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
RP Deen, D (reprint author), USN, Res Lab, Div Elect Sci & Technol, 4555 Overlook Ave, Washington, DC 20375 USA.
EM david.deen@nrl.navy.mil
RI Katzer, D. Scott/N-7841-2013
FU Officeof Naval Research; NSF [DMR 0846445]
FX This work was supported by the Officeof Naval Research. The ALD work at
UMBC was supported in part by NSF (DMR 0846445).
NR 16
TC 15
Z9 15
U1 0
U2 18
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2011
VL 8
IS 7-8
DI 10.1002/pssc.201001071
PG 4
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
Condensed Matter
SC Materials Science; Physics
GA BZG94
UT WOS:000301581500129
ER
PT S
AU Nepal, N
Frajtag, P
Zavada, JM
El-Masry, NA
Bedair, SM
AF Nepal, N.
Frajtag, P.
Zavada, J. M.
El-Masry, N. A.
Bedair, S. M.
BA Wetzel, C
Khan, A
BF Wetzel, C
Khan, A
TI Light emitting diodes based on sidewall m-plane epitaxy of etched
GaN/sapphire templates
SO PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 8,
NO 7-8
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT International Workshop on Nitride Semiconductors (IWN)/Fall Meeting of
the European-Materials-Research-Society (E-MRS)/Symposium N/Symposium H
CY SEP 19-24, 2010
CL Tampa, FL
SP European Mat Res Soc (EMRS)
DE GaN; sidewall epitaxy; semi-polar plane; sidewall LEDs
ID QUANTUM-WELLS; ELECTROLUMINESCENCE; FIELDS; GREEN
AB Light emitting diodes (LEDs) were grown on the etched m-plane of c-plane GaN/sapphire templates by metal organic chemical vapor deposition (MOCVD). The LEDs, with InxGa1-xN/GaN quantum wells (QWs), were studied and current-voltage measurements show p-n diode behavior. TEM image analysis established that the QWs are on the {1 (1) over bar 01} sidewall semi-polar plane. Electroluminescence measurements on the fabricated LEDs display an emission peak at 487 nm, with a blue shift of only 4 nm on increasing injected current density from 0.3 to 100 A/cm(2). The demonstrated sidewall approach significantly reduces the quantum confined Stark Effect found in QWs grown on c-plane substrates. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Nepal, N.; Zavada, J. M.; Bedair, S. M.] North Carolina State Univ, Dept Elect & Comp Engn, Raleigh, NC 27695 USA.
[Frajtag, P.; El-Masry, N. A.] North Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA.
[Nepal, N.] Naval Res Lab, Washington, DC USA.
RP Bedair, SM (reprint author), North Carolina State Univ, Dept Elect & Comp Engn, Raleigh, NC 27695 USA.
EM bedair@ncsu.edu
FU United State Army Research Office
FX Dr. N. Nepal is a former fellow of the NRC-ARO Postdoctoral
Associateship Program. The work is supported by the United State Army
Research Office. Authors would like to acknowledge Mr. A. Hosalli for
his help in electrical measurements. NEM and JMZ acknowledge support
from NSF under the IR&D programs.
NR 9
TC 3
Z9 3
U1 0
U2 8
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2011
VL 8
IS 7-8
DI 10.1002/pssc.201000983
PG 3
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
Condensed Matter
SC Materials Science; Physics
GA BZG94
UT WOS:000301581500108
ER
PT S
AU Tadjer, MJ
Horcajo, SM
Anderson, TJ
Cuerdo, R
Hobart, KD
Calle, F
AF Tadjer, Marko J.
Martin Horcajo, Sara
Anderson, Travis J.
Cuerdo, Roberto
Hobart, Karl D.
Calle, Fernando
BA Wetzel, C
Khan, A
BF Wetzel, C
Khan, A
TI Temperature and time dependent threshold voltage characterization of
AlGaN/GaN high electron mobility transistors
SO PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 8,
NO 7-8
SE Physica Status Solidi C-Current Topics in Solid State Physics
LA English
DT Proceedings Paper
CT International Workshop on Nitride Semiconductors (IWN)/Fall Meeting of
the European-Materials-Research-Society (E-MRS)/Symposium N/Symposium H
CY SEP 19-24, 2010
CL Tampa, FL
SP European Mat Res Soc (EMRS)
DE AlGaN/GaN; enhancement mode; fluorine; plasma; ion implantation;
threshold voltage
ID HEMTS
AB High electron mobility transistors (HEMTs) based on the AlGaN/GaN heterostructure were fabricated with treatments of either CF4 plasma or F-19(+) implantation prior to gate deposition. The post-treatment threshold voltage V-T was shifted positively from -4.06 V to 0.25 V and -0.34 V, respectively. Subsequent 400 degrees C, up to 10 min furnace annealing increased the transconductance g(m) in both samples, leading to a two order of magnitude increase in drain current density. The implanted sample improved its V-T to -0.16 V, whereas the V-T of the CF4 plasma-treated one reverted to -1.95 V. Annealing a commercial power HEMT (EPC1012, Efficient Power Conversion Corp.) under identical conditions resulted in stable V-T within 1.4% (V-T,V- Rated = 1.4 V). As the ambient temperature was increased to 150 degrees C, V-T of our samples remained within 10% of the room-temperature values. Reliability stress measurements were performed by applying a V-STRESS of +/-1 V or +/-2 V for up to 10 minutes. V-T of EPC HEMTs increased with temperature and stress polarity, but remained close to specification up to the maximum rated temperature (125 C). (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
C1 [Tadjer, Marko J.; Martin Horcajo, Sara; Cuerdo, Roberto; Calle, Fernando] Univ Politecn Madrid, Inst Syst Based Optoelect & Microtechnol ISOM, E-28040 Madrid, Spain.
[Anderson, Travis J.; Hobart, Karl D.] Naval Res Lab, Power Elect Branch, Washington, DC 20375 USA.
RP Tadjer, MJ (reprint author), Univ Politecn Madrid, Inst Syst Based Optoelect & Microtechnol ISOM, E-28040 Madrid, Spain.
EM mtadjer@die.upm.es
OI CALLE GOMEZ, FERNANDO/0000-0001-7869-6704
FU Spanish Ministerio de Ciencia e Innovacion [RUE (CSD2009-00046)]; AEGaN
FX The authors would like to acknowledge the following ISOM-UPM staff: Ms.
Maria del Carmen Sabido Siller and Mr. David Lopez-Romero for device
processing, and Dr. Fatima Romero and Dr. Elias Munoz Merino for
insightful discussions. M. J. T. acknowledges Dr. Fritz Kub (NRL) for
the collaborative efforts. This work has been supported by the Spanish
Ministerio de Ciencia e Innovacion under projects Consolider RUE
(CSD2009-00046) and AEGaN
NR 10
TC 1
Z9 1
U1 3
U2 19
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
SN 1862-6351
J9 PHYS STATUS SOLIDI C
PY 2011
VL 8
IS 7-8
DI 10.1002/pssc.201001102
PG 3
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
Condensed Matter
SC Materials Science; Physics
GA BZG94
UT WOS:000301581500071
ER
PT S
AU Oran, ES
AF Oran, E. S.
BE Li, J
Fu, S
TI Stochasticity and Dynamics of High-Speed Reactive Flows
SO RECENT PROGRESSES IN FLUID DYNAMICS RESEARCH - PROCEEDINGS OF THE SIXTH
INTERNATIONAL CONFERENCE ON FLUID MECHANICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 6th International Conference on Fluid Mechanics
CY JUN 30-JUL 03, 2011
CL Guangzhou, PEOPLES R CHINA
SP Chinese Soc Theoret & Appl Mech (CSTAM), Sun Yat-Sen Univ (SYSU), Gesellschaft Angewandte Mathematik & Mechanik (GAMM), U S Natl Comm Biomech (NCB US), Engn Mech Inst/ASCE (EMI/ASCE), Appl Mech Div/ASME (AMD/ASME), Japan Soc Mech Engn (JSME), Japan Soc Fluid Mech (JSFM), Int Assoc Hydraul Res (IAHR), K C Wong Educ Fdn, Natl Nat Sci Fdn China, Inst Mech, Chinese Acad Sci (IMECH CAS), Hong Kong Soc Theoret & Appl Mech (HKSTAM), Guangdong Soc Theoret & Appl Mech (GDSTAM), S China Univ Technol (SCUT), S China Sea Inst Oceanol, Chinese Acad Sci (SCSIOCAS), Guangzhou Inst Energy Convers, Chinese Acad Sci (GZIECCAS)
DE turbulence; flame-turbulence interactions; deflagrations;
deflagration-to-detonation transition (DDT)
ID TO-DETONATION TRANSITION; FLAME ACCELERATION; NUMERICAL-SIMULATION;
HOT-SPOTS; DEFLAGRATION; DDT; EXPLOSIONS; MECHANISM; CHANNELS
AB This paper uses selected results from compressible multidimensional reactive-flow simulations to show how flame acceleration and possible deflagration-to-detonation transition (DDT) evolve in spatially confined system. The approach is to describe the evolution of hydrogen-air flames in relatively small channels (order of centimeters) from the very early stages, just after ignition, through to the formation of a turbulent flame, and then to the development of shocks. Shock-flame interactions are responsible for the development of a shock-flame complex that propagates at a relatively steady speed of half of the Chapman-Jouguet detonation velocity. DDT arises from to the development of "hot spots," or gradients of reactivity. The system is an example of one controlled by multiple stochastic processes, turbulence and hot-spot formation, and in this cases, the turbulence is non-Kolmogorov, nonequilibrium, and can not be fully described by the terms of classical turbulence.
C1 USN, Res Lab, Lab Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
RP Oran, ES (reprint author), USN, Res Lab, Lab Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
EM elaine.oran@nrl.navy.mil
NR 20
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0936-1
J9 AIP CONF PROC
PY 2011
VL 1376
PG 7
WC Mechanics
SC Mechanics
GA BZM71
UT WOS:000302054700007
ER
PT J
AU Hough, JJ
AF Hough, Jeffrey J.
TI THE GOLD MEDAL AWARD
SO NAVAL ENGINEERS JOURNAL
LA English
DT Article
C1 [Hough, Jeffrey J.] USN, CISD, Surface Warfare Ctr Carderock NSWC CD, Keedysville, MD 21756 USA.
[Hough, Jeffrey J.] Future Concepts & Surface Ship Design Grp, Future Fleet & Force Concepts Div, Washington, DC USA.
RP Hough, JJ (reprint author), USN, CISD, Surface Warfare Ctr Carderock NSWC CD, Keedysville, MD 21756 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0028-1425
J9 NAV ENG J
JI Nav. Eng. J.
PY 2011
VL 123
IS 4
BP 8
EP 9
DI 10.1111/j.1559-3584.2012.00350.x
PG 2
WC Engineering, Marine; Engineering, Civil; Oceanography
SC Engineering; Oceanography
GA 909OJ
UT WOS:000301573700002
ER
PT J
AU Flynn, CL
AF Flynn, Craig L.
TI THE FRANK C. JONES AWARD
SO NAVAL ENGINEERS JOURNAL
LA English
DT Article
C1 [Flynn, Craig L.] USN, Ctr Underwater Syst, New London, CT 06320 USA.
[Flynn, Craig L.] USN, Undersea Warfare Ctr Div, Newport, RI USA.
RP Flynn, CL (reprint author), USN, Ctr Underwater Syst, New London, CT 06320 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0028-1425
J9 NAV ENG J
JI Nav. Eng. J.
PY 2011
VL 123
IS 4
BP 20
EP 21
DI 10.1111/j.1559-3584.2012.00350_5.x
PG 2
WC Engineering, Marine; Engineering, Civil; Oceanography
SC Engineering; Oceanography
GA 909OJ
UT WOS:000301573700007
ER
PT J
AU Kadmiri, MM
AF Kadmiri, Monique M.
TI THE ROSENBLATT YOUNG NAVAL ENGINEER AWARD
SO NAVAL ENGINEERS JOURNAL
LA English
DT Article
C1 [Kadmiri, Monique M.] USN, Sea Syst Command NAVSEA, New In Serv Ship Design Div, Stennis Space Ctr, MS 39529 USA.
[Kadmiri, Monique M.] USN, Ctr Surface Warfare, Carderock Div, Bethesda, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0028-1425
J9 NAV ENG J
JI Nav. Eng. J.
PY 2011
VL 123
IS 4
BP 27
EP 29
DI 10.1111/j.1559-3584.2012.00350_8.x
PG 3
WC Engineering, Marine; Engineering, Civil; Oceanography
SC Engineering; Oceanography
GA 909OJ
UT WOS:000301573700010
ER
PT J
AU Millar, RC
Olwell, DH
AF Millar, Richard C.
Olwell, David H.
TI Parametric Models for Aircraft Engine Removals Resulting from Foreign
Object Damage
SO NAVAL ENGINEERS JOURNAL
LA English
DT Article
AB An earlier nonparametric statistical study of GE F414 engine removals from operational F/A-18 aircraft in US Navy service provided insights into the lifetime patterns of engine removals for various causes. Inspection of the estimated hazard function for engine removals for foreign object damage (FOD) suggested that a parametric analysis using Erlang distributions might be fruitful, bolstered by a hypothesized relevance to the maintenance procedures governing engine removals for this cause, and their outcomes. The objective was both a better model to forecast engine removals and to provide insight into the number of FOD incidents it took to drive an engine removal. Gamma and Erlang distributions did better fit the removals data and provide a tool for predicting engine removals, aircraft availability impact, and the resultant maintenance workload. A parametric model using a cascade of Erlang functions was developed to simulate the combined FOD/line maintenance process, which provides insight into the outcomes expected under reasonable simplifying assumptions. This model predicts that the key research issue, the probability that a typical FOD event prompts a removal, cannot be estimated from engine removals data alone. Field data must be collected to gain understanding of the underlying frequency of FOD and the utility of the present inspection criteria.
C1 [Millar, Richard C.] Naval Postgraduate Sch, Dept Syst Engn, Monterey, CA USA.
RP Millar, RC (reprint author), Naval Postgraduate Sch, Dept Syst Engn, Monterey, CA USA.
NR 7
TC 0
Z9 0
U1 0
U2 1
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0028-1425
J9 NAV ENG J
JI Nav. Eng. J.
PY 2011
VL 123
IS 4
BP 99
EP 107
DI 10.1111/j.1559-3584.2011.00337.x
PG 9
WC Engineering, Marine; Engineering, Civil; Oceanography
SC Engineering; Oceanography
GA 909OJ
UT WOS:000301573700017
ER
PT S
AU Wisher, RA
AF Wisher, Robert A.
BE Frunzeti, T
Popescu, V
Jugureanu, R
Stefan, V
Radu, C
TI ADL: FOUNDATIONS FOR GLOBAL E-LEARNING INTEROPERABILITY
SO ANYWHERE, ANYTIME - EDUCATION ON DEMAND, VOL I
SE eLearning and Software for Education
LA English
DT Proceedings Paper
CT 7th International Scientific Conference eLearning and Software for
Education
CY APR 28-29, 2011
CL Bucharest, ROMANIA
DE ADL elearning interoperability; training; military education
AB The lack of interoperability in the early years of application hindered a deeper penetration of technology into the world of learning. The ADL Initiative has grown from a concept in 1997 to a global undertaking for interoperability. An unexpected consequence is the extent of global adoption of the ADL approach by other governments, for military as well as civilian training and education.
C1 [Wisher, Robert A.] USN, Postgrad Sch, Monterey, CA USA.
EM robert.wisher@adlnet.gov
NR 13
TC 0
Z9 0
U1 0
U2 0
PU EDITURA UNIVERSITARA
PI BUCHAREST
PA BD NICOLAE BALCESCU NO 27-33, BUCHAREST, 00000, ROMANIA
SN 2066-026X
J9 ELEARN SOFTW EDUC
PY 2011
BP 33
EP 41
PG 9
WC Education & Educational Research
SC Education & Educational Research
GA BYQ77
UT WOS:000299797400004
ER
PT S
AU Hamlington, PE
Krasnov, D
Boeck, T
Schumacher, J
AF Hamlington, P. E.
Krasnov, D.
Boeck, T.
Schumacher, J.
GP IOP
TI Dissipation-scale fluctuations in the inner region of turbulent channel
flow
SO 13TH EUROPEAN TURBULENCE CONFERENCE (ETC13): STATISTICAL ASPECTS,
MODELLING AND SIMULATIONS OF TURBULENCE
SE Journal of Physics Conference Series
LA English
DT Proceedings Paper
CT 13th European Turbulence Conference (ETC)
CY SEP 12-15, 2011
CL Univ Warsaw, Warsaw, POLAND
HO Univ Warsaw
AB The statistics of intense energy dissipation events in wall-bounded shear flows are studied using highly resolved direct numerical simulations of turbulent channel flow at three different friction Reynolds numbers. Distributions of the energy dissipation rate and local dissipation scales are computed at various distances from the channel walls, with an emphasis on the behavior of the statistics in the near-wall region. The dependence of characteristic mean and local dissipation scales on wall distance is also examined over the full channel height. Systematic variations in these statistics are found close to the walls due to the anisotropy generated by mean shear and coherent vortical structures. Results near the channel centerline are consistent with those found in homogeneous isotropic turbulence.
C1 [Hamlington, P. E.] USN, Res Lab, Computat Phys & Fluid Dynam Lab, Washington, DC 20375 USA.
RP Hamlington, PE (reprint author), USN, Res Lab, Computat Phys & Fluid Dynam Lab, Washington, DC 20375 USA.
EM peterh@lcp.nrl.navy.mil; dmitry.krasnov@tu-ilmenau.de;
thomas.boeck@tu-ilmenau.de; joerg.schumacher@tu-ilmenau.de
RI Boeck, Thomas/C-2188-2017
OI Boeck, Thomas/0000-0002-0814-7432
NR 17
TC 0
Z9 0
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1742-6588
J9 J PHYS CONF SER
PY 2011
VL 318
AR 042019
DI 10.1088/1742-6596/318/4/042019
PG 5
WC Mechanics; Physics, Applied; Statistics & Probability
SC Mechanics; Physics; Mathematics
GA BZF17
UT WOS:000301304500019
ER
PT S
AU Seigenthaler, T
Weatherford, T
Porterl, M
AF Seigenthaler, T.
Weatherford, T.
Porterl, M.
GP IEEE
TI TCAD-Based Failure Analysis and Modeling of Pit Formation in GaN HEMTs
SO 2011 IEEE INTERNATIONAL INTEGRATED RELIABILITY WORKSHOP FINAL REPORT
(IRW)
SE IEEE International Integrated Reliability Workshop Final Report
LA English
DT Proceedings Paper
CT IEEE International Integrated Reliability Workshop Final Report (IIRW)
CY OCT 16-20, 2011
CL S Lake Tahoe, CA
SP IEEE Electron Devices Soc, IEEE Reliabil Soc, Stanford Univ, Univ California Berkeley, IEEE
AB High field DC life testing of Gallium Nitride (GaN) High Electron Mobility Transistors (HEMTs) has shown that degradation of the devices leads to the formation of morphological pits near the gate edges of the device, which have been proposed to be a cause of drain current collapse and threshold voltage shift. In order to test various proposed physical mechanisms of pit formation in GaN HEMTs, we have utilized the Silvaco ATLAS (c), ATHENA (c) and DevEdit (c) TCAD software packages to create a model of pit formation in the AIGaN layer corresponding to experimental observations. The model allows for multiple theories of pit formation to be tested by correlating progressive expansion of the pit area with quantities such as vertical electric field magnitude and thermal gradients. Utilizing vertical electric field as the impetus for pit formation, along with a set pit growth rate of 10 angstrom/iteration, the simulation shows complete drain current collapse in three iterations, corresponding to 7x10(3) hours of DC stress based on experimentally observed square-root growth of the pit area with time. Suggestions for further uses of the model for investigation of pit formation in GaN HEMTs are discussed in the conclusion.
C1 [Seigenthaler, T.; Weatherford, T.; Porterl, M.] USN, Postgrad Sch, Code EC WT, Monterey, CA 93943 USA.
RP Seigenthaler, T (reprint author), USN, Postgrad Sch, Code EC WT, Monterey, CA 93943 USA.
NR 7
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-8841
BN 978-1-4577-0115-3
J9 INT INTEG REL WRKSP
PY 2011
BP 107
EP 110
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BYV54
UT WOS:000300607100027
ER
PT S
AU Brunton, J
Yamada, T
Weatherford, T
AF Brunton, J.
Yamada, T.
Weatherford, T.
GP IEEE
TI TCAD Analysis of Breakdown During Voltage Sweep in a Carbon Nanofiber
(CNF) Interconnect
SO 2011 IEEE INTERNATIONAL INTEGRATED RELIABILITY WORKSHOP FINAL REPORT
(IRW)
SE IEEE International Integrated Reliability Workshop Final Report
LA English
DT Proceedings Paper
CT IEEE International Integrated Reliability Workshop Final Report (IIRW)
CY OCT 16-20, 2011
CL S Lake Tahoe, CA
SP IEEE Electron Devices Soc, IEEE Reliabil Soc, Stanford Univ, Univ California Berkeley, IEEE
C1 [Brunton, J.; Weatherford, T.] USN, Postgrad Sch, Code EC WT, Monterey, CA 93943 USA.
[Yamada, T.] Santa Clara Univ, Sch Engn Santa Clara, Santa Clara, CA 95053 USA.
RP Brunton, J (reprint author), USN, Postgrad Sch, Code EC WT, Monterey, CA 93943 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-8841
BN 978-1-4577-0115-3
J9 INT INTEG REL WRKSP
PY 2011
BP 125
EP 128
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BYV54
UT WOS:000300607100032
ER
PT J
AU Sakarya, FA
Nagel, GS
Tran, LH
Molnar, JA
AF Sakarya, F. Ayhan
Nagel, George S.
Tran, Lan H.
Molnar, Joseph A.
GP IEEE
TI Wideband Compressed Sensing for Cognitive Radios
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
DE compressed sensing; compressive sensing; cognitive radio(CR); dynamic
spectrum access (DSA); dynamic spectrum management; universal software
radio peripheral (USRP); GNU radio companion (GRC); regularized
orthogonal matching pursuit (ROMP); basis pursuit (BP); primal dual
(PD); spectral projected-gradient (SPG)
AB Efficient utilization of spectral bands in a dynamic environment with a continuously changing occupation rate is challenging. Static spectral allocations preclude the use of unoccupied spectrum, unless the spectrum manager has released the allocation to another mission. Standard spectral sensing techniques employ swept narrowband receivers. While effective in creating a composite, these techniques are ineffective at identifying short duration signals. Real-time spectral analysis techniques are effective at capturing short duration transmissions, but usually have narrow band capabilities, limited dynamic range and are relatively expensive. Timely accurate sensing of wide spectral band using traditional spectral estimations at the Nyquist rate (or higher) is another challenge due to the high data rate. Compressed sensing (CS) techniques utilize signal-to-information rate processing when signals are sparse in a specific domain. Dynamic spectrum access (often considered a critical component of a cognitive radio (CR)) can reutilize temporally unoccupied spectrum. An accurate estimate of the current state of spectral occupancy is critical to the autonomous decision processes involved in dynamic spectrum access. From this perspective, CS is being studied as an enhancement to dynamic spectrum access strategies.
This study addresses feasibility issues for the development of autonomous CS-CR systems that are capable of performing spectrum sensing and recovery without a priori information about the spectral occupancy. Since recovery requires computationally intense non-linear optimization, we perform a single platform trade study on CS methodologies (BP-PD, BP-SPG, ROMP, Edge Detection, and Sequential Recovery) for efficient wideband recovery relative to execution time and reconstruction error. We propose adaptive coarse detection, and exact recovery based on adaptive edge detection. We present the results using continuous waves and pulses (MATLAB or GRC generated, or USRP measured), and show favorable conditions for BP-PD, BP-SPG, ROMP, adaptive recovery performance, and discuss potential for application of CS in a CR architecture.
C1 [Sakarya, F. Ayhan; Tran, Lan H.; Molnar, Joseph A.] USN, Res Lab, Networks & Commun Syst Branch, Div Informat Technol, Washington, DC 20375 USA.
[Nagel, George S.] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA.
RP Sakarya, FA (reprint author), USN, Res Lab, Networks & Commun Syst Branch, Div Informat Technol, Washington, DC 20375 USA.
NR 23
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 31
EP 36
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500006
ER
PT J
AU Jarvis, L
McEachen, J
Loomis, H
AF Jarvis, Leslie
McEachen, John
Loomis, Herschel
GP IEEE
TI Geolocation of LTE Subscriber Stations Based on the Timing Advance
Ranging Parameter
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
DE Long Term Evolution (LTE); geolocation; ranging
AB This paper investigates geolocating a Long Term Evolution (LTE) subscriber station based on the timing advance ranging parameter within the network signal internals. The basic approach to geolocation based on radial distances from multiple base stations is outlined. Specifics of the timing parameters used during LTE network entry are examined as they relate to calculating these distances. Computer simulation is used to demonstrate expected geolocation accuracy in multiple base station networks when estimating likely locations of subscriber stations on a two-dimensional coordinate mapping system. Computer simulation is further refined to demonstrate expected geolocation accuracy in multiple base station networks when estimating likely locations of subscriber stations on a three-dimensional coordinate mapping scheme. Results show the possibility of fixes with ten times greater accuracy than in previous results in the literature when applying timing advance techniques to Global System for Mobile communications networks when using a two-dimensional coordinate mapping scheme, and accuracy approaching fifty centimeters when using a three-dimensional coordinate mapping scheme, accuracy that is comparable to the accuracy in Global Positioning System technologies.
C1 [Jarvis, Leslie] USN, Washington, DC 20350 USA.
[McEachen, John; Loomis, Herschel] US Navy, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
RP Jarvis, L (reprint author), USN, Washington, DC 20350 USA.
EM mceachen@nps.edu; loomis@nps.edu
NR 11
TC 2
Z9 2
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 180
EP 187
PG 8
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500032
ER
PT J
AU Islam, MN
Mandayam, N
Kompella, S
AF Islam, Muhammad Nazmul
Mandayam, Narayan
Kompella, Sastry
GP IEEE
TI Optimal Resource Allocation in a Bandwidth Exchange Enabled Relay
Network
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
DE Radio Resource Management; Incentivized Forwarding; Relay Network;
Convex Optimization
ID AD HOC NETWORKS; WIRELESS NETWORKS; COOPERATION; STRATEGIES; DIVERSITY
AB We investigate an incentive mechanism called Bandwidth Exchange (BE) for cooperative forwarding where transmission bandwidth is used as a flexible resource. We focus on a network where two nodes, communicating with the base station (BS) / access point (AP), initially get optimal amount of bandwidth based on direct path transmission and then use their individual bandwidths as flexible incentives for two hop relaying. In our proposed scenario, the forwarder node sends its own data along with the data of the sender in exchange for additional transmission bandwidth, provided by the sender. We compare the performance of the proposed mechanism with optimal bandwidth and power allocation based direct transmission. We use sum rate, max-min rate and min-max power as the evaluation criteria and prove the convex/concave nature of the optimization problem formulations. Our numerical analysis shows that the BE based cooperative forwarding extends the coverage in wireless networks when the far node falls in outage under direct transmission. Further, BE significantly improves the max-min rate and min-max power performance of the network.
C1 [Islam, Muhammad Nazmul; Mandayam, Narayan] Rutgers State Univ, WINLAB, Piscataway, NJ 08855 USA.
[Kompella, Sastry] US Navy, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
RP Islam, MN (reprint author), Rutgers State Univ, WINLAB, Piscataway, NJ 08855 USA.
EM mnislam@winlab.rutgers.edu; narayan@winlab.rutgers.edu; sk@ieee.org
FU Office of Naval Research [N00014-11-1-0132]
FX This work is supported by the Office of Naval Research under grant
N00014-11-1-0132.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 242
EP 247
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500042
ER
PT J
AU Kao, CH
Robertson, C
AF Kao, Chi-Han
Robertson, Clark
GP IEEE
TI An Improved Link-16/JTIDS Receiver in Pulsed-Noise Interference
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
DE Errors-and-erasures decoding; Joint Tactical Information Distribution
System; Link-16; noise-normalization combining; pulsed-noise
interference
AB Link-16 provides presumably secure and jam-resistant tactical information for land, sea, and air platforms. Its communication terminal, Joint Tactical Information Distribution System (JTIDS), is a hybrid direct-sequence/frequency-hopping spread spectrum system and features Reed-Solomon (RS) codes for channel coding, cyclic code-shift keying (CCSK) for 32-ary baseband symbol modulation, and minimum-shift keying (MSK) for waveform modulation. In this paper, a noise-normalization combining MSK chip demodulator and an errors-and-erasures RS decoder (EED) are proposed in the JTIDS receiver to replace the original MSK chip demodulator and errors-only RS decoder in order to enhance the anti-jam capability of JTIDS. The symbol error rate (SER) performances of the proposed JTIDS receiver are investigated in pulsed-noise interference (PNI) by a combination of analysis and simulation assuming perfect frequency de-hopping, sequence and chip synchronization, and de-scrambling. Given various fraction of time the jammer is on, the SER performances obtained with the proposed JTIDS receiver are compared to those obtained with the original JTIDS receiver. The results show that the proposed JTIDS receiver not only significantly outperforms the original system as the fraction of time the jammer is on is large, but completely eliminates the effect caused by PNI as the fraction of time the jammer is on is small.
C1 [Kao, Chi-Han] ROC Naval Acad, Dept Elect Engn, Kaohsiung, Taiwan.
[Robertson, Clark] US Navy, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
RP Kao, CH (reprint author), ROC Naval Acad, Dept Elect Engn, Kaohsiung, Taiwan.
NR 10
TC 2
Z9 3
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 341
EP 346
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500059
ER
PT J
AU Kam, C
Kompella, S
Nguyen, GD
Ephremides, A
Jiang, ZH
AF Kam, Clement
Kompella, Sastry
Nguyen, Gam D.
Ephremides, Anthony
Jiang, Zaihan
GP IEEE
TI Impact of Relay Placement on Energy Efficiency in Underwater Acoustic
Networks
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
AB In spite of the body of work in modeling the underwater channel, there is still considerable lack of fundamental understanding that is required to enable the widespread deployment of Underwater Acoustic Networks (UANs). In this paper we study one such aspect, namely the impact of relay placement on the overall transmit power required to maintain a certain quality of communication between two nodes, in a multi-hop underwater line network. We start by analyzing a simple case involving one relay and a common signal frequency over all hops. We then extend the analysis to include different signal frequencies over different hops. Specifically, in each case, we find through analysis and numerical evaluation the optimal relay placement that minimizes total transmit power, thereby improving energy efficiency. We observe that the optimal relay locations are not always equidistant, especially when each hop can choose from a set of signal frequencies for transmission.
C1 [Kam, Clement; Kompella, Sastry; Nguyen, Gam D.] USN, Div Informat Technol, Res Lab, Washington, DC 20375 USA.
[Ephremides, Anthony] Univ Maryland, Dept Elect & Comp Engn, College Pk, MD 20742 USA.
[Jiang, Zaihan] Naval Res Lab, Div Acoust, Washington, DC 20375 USA.
RP Kam, C (reprint author), USN, Div Informat Technol, Res Lab, Washington, DC 20375 USA.
FU Office of Naval Research
FX This work was supported by the Office of Naval Research.
NR 8
TC 2
Z9 2
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 424
EP 429
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500073
ER
PT J
AU Nguyen, GD
Wieselthier, JE
Kompella, S
Ephremides, A
AF Nguyen, Gam D.
Wieselthier, Jeffrey E.
Kompella, Sastry
Ephremides, Anthony
GP IEEE
TI TRANSMISSION STRATEGIES FOR SINGLE-DESTINATION WIRELESS NETWORKS
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
ID PACKET RADIO NETWORKS; SENSE MULTIPLE-ACCESS; CHANNELS
AB We consider the media-access control problem for nodes with heavy traffic in single-destination wireless networks. We assume that each source transmits in each time slot according to a transmission probability, which is a continuous value between 0 and 1. Our goal is to determine the values of the transmission probabilities so that the network throughput is maximized. In this paper, we show that the maximum throughput is achieved only if these values are either 0 or 1. We obtain closed-form results for optimal throughput for networks that operate under a homogenous situation in which the expected value of the received power at the destination is the same for each source. We then extend our studies to more general networks, which rely on exhaustive search for the optimal set of transmissions. The search has exponential complexity and is feasible only for networks with small or moderate sizes. Thus, we also develop heuristic algorithms, which have polynomial-time complexity and are suitable for large and general networks.
C1 [Nguyen, Gam D.; Kompella, Sastry] USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
[Wieselthier, Jeffrey E.] Wieselthier Res, Silver Spring, MD USA.
[Ephremides, Anthony] Univ Maryland, Dept Elect & Comp Engn, College Pk, MD USA.
RP Nguyen, GD (reprint author), USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
FU Office of Naval Research
FX This work was supported by the Office of Naval Research.
NR 9
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 483
EP 488
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500083
ER
PT J
AU Spyridis, K
Robertson, C
AF Spyridis, Konstantinos
Robertson, Clark
GP IEEE
TI Performance Simulation and Analysis of M-ary Frequency-Shift Keying with
Reed Solomon Encoding, Noncoherent Demodulation, and Hybrid
Soft-Decision Hard Decision Decoding
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
DE forward error correction coding; reliability information matrix; hard
decision decoding; soft decision decoding; orthogonal signaling;
noncoherent demodulation
ID MATHEMATICAL-THEORY; CODES; COMMUNICATION
AB Hybrid hard decision-soft decision (HD SD) decoding is a novel decoding technique for Reed Solomon (RS) codes. HD SD decoding utilizes traditional hard decision RS decoding where the received block is either decoded correctly or a decoding failure exists. In the event of a decoding failure, channel reliability information is used to identify received code symbols with a low probability of being correctly received and to generate new code symbol estimates that are used in the traditional RS decoding algorithm. HD SD RS decoding was developed for use with bandwidth efficient modulation schemes such as M-ary phase-shift keying). Since many communication systems use orthogonal modulation schemes such as M-ary frequency-shift keying (MFSK) for more robust communication links, this paper presents the performance simulation and analysis of MFSK with RS encoding, hybrid HD SD decoding, and noncoherent demodulation. In addition to AWGN, the effects of pulse-noise interference (PNI) are considered. An interesting result is that hybrid HD SD decoding has better performance and error correction capability than either traditional HD decoding or other RS SD techniques that have been examined in the literature, especially when PNI is present.
C1 [Spyridis, Konstantinos; Robertson, Clark] USN, Postgrad Sch, Dept Elect & Comp Engn, Grad Sch Engn & Appl Sci, Monterey, CA 93943 USA.
RP Spyridis, K (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, Grad Sch Engn & Appl Sci, Monterey, CA 93943 USA.
NR 18
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 610
EP 615
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500105
ER
PT J
AU Dean, J
Claypool, D
Macker, JP
AF Dean, Justin
Claypool, David
Macker, Joseph P.
GP IEEE
TI Temporally Robust Relay Sets for Mobile Wireless Networks
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
AB Existing relay set election algorithms used for self-organizing mobile ad hoc network (MANET) [I] routing control and data forwarding are often designed to continuously minimize the relay set at topological snapshots in time. Due to errors in wireless link sensing and the potential for significant neighbor adjacency fluctuation, present distributed relay set. election algorithms can cause significant reelection churn for a unicast or multicast routing protocol since the algorithm is attempting to optimize the relay set for each topological instance. This paper illustrates an investigation of improvements in temporal robustness by minimizing reelection churn caused by these algorithms. In this paper several existing relay set election algorithms are compared. This includes presentation of performance results in time when undergoing increasing congestion and dynamics due to mobility. Simple techniques designed to improve the temporal stability of the relay set population undergoing significant dynamics are presented and tested. Initial results from modeling demonstrating that temporal robustness improvement to these algorithms is achievable and that more work is needed to understand the tradeoffs, such as the additional network overhead required to achieve stability and the effect of different styles of link fluctuation and topological dynamics.
C1 [Dean, Justin; Claypool, David; Macker, Joseph P.] USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
RP Dean, J (reprint author), USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
EM justin.dean@nrl.navy.mil; david.claypool@nrl.navy.mil;
joseph.macker@nrl.navy.mil
NR 19
TC 4
Z9 4
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 655
EP 660
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500112
ER
PT J
AU Sharma, S
Shi, Y
Hou, YT
Kompella, S
Midkiff, SF
AF Sharma, Sushant
Shi, Yi
Hou, Y. Thomas
Kompella, Sastry
Midkiff, Scott F.
GP IEEE
TI Optimal Grouping and Matching for Network-Coded Cooperative
Communications
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
DE Cooperative communications; network coding; grouping; node selection;
matching; optimization
ID WIRELESS NETWORKS; RELAY NETWORKS; DIVERSITY
AB Network-coded cooperative communications (NCCC) is a new advance in wireless networking that exploits network coding (NC) to improve the performance of cooperative communications (CC). However, there remains very limited understanding of this new hybrid technology, particularly at the link layer and above. This paper fills in this gap by studying a network optimization problem that requires joint optimization of session grouping, relay node grouping, and matching of session/relay groups. After showing that this problem is NP-hard, we present a polynomial time heuristic algorithm to this problem. Using simulation results, we show that our algorithm is highly competitive and can produce near-optimal results.
C1 [Sharma, Sushant] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Shi, Yi; Hou, Y. Thomas; Midkiff, Scott F.] Virginia Tech, Blacksburg, VA 24061 USA.
[Kompella, Sastry] Naval Res Lab, Washington, DC 20375 USA.
RP Sharma, S (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
OI Midkiff, Scott/0000-0003-4933-7360
FU NSF [CNS-1064953]; ONR
FX The work of Y.T. Hou, S.F. Midkiff, S. Sharma, and Y. Shi was supported
in part by NSF under Grant CNS-1064953. The work of S. Kompella was
supported in part by the ONR.
NR 23
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 722
EP 728
PG 7
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500123
ER
PT J
AU Scott, K
Refaei, T
Trivedi, N
Trinh, J
Macker, JP
AF Scott, Keith
Refaei, Tamer
Trivedi, Nirav
Trinh, Jenny
Macker, Joseph P.
GP IEEE
TI Robust Communications for Disconnected, Intermittent, Low-Bandwidth
(DIL) Environments
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
DE DIL; SMF; NORM; DTN
AB Battlefield communications can be disrupted by a number of factors including environmental constraints, wireless dynamics and mobility, and both intentional and non-intentional interference. Robust, reliable, and efficient mechanisms are needed in such environments to ensure that critical data is delivered in the face of disruptions, intermittent connectivity, and low-bandwidth (DIL). In this paper, we examine a tiered approach to providing reliable communication in DIL environments. We model a tactical network scenario in which nodes in a low bandwidth loosely-connected ad-hoc network periodically send position/location information (PLI) messages to a shore base station. We utilize this scenario to quantify the differences in performance between a number of layered approaches that utilize mechanisms such as the Simplified Multicast Forwarding (SMF) protocol, the NACK-oriented Reliable Multicast (NORM), and Delay/Disruption Tolerant Networking (DTN) in mitigating the challenges of DIL environments. Our evaluation of the layered approaches considers metrics relevant to two broad classes of data: 'ephemeral' and 'persistent': ephemeral data (e. g. instantaneous position-location information of a node) has a relatively short lifetime and older data is obviated by newer data; by contrast, persistent data (e. g. exact mobility track of a node) has a longer useful lifetime and is not obviated by newer data. We examine the latency and staleness for ephemeral data and the message delivery ratio for persistent data. Our results show that SMF at the IP layer provides robust delivery to a single connected component of the network whereas NACKing and retransmission by NORM addresses short disruptions. For long-term disruptions, a DTN gossiping (i.e. anti-entropy) router can effectively bridge the gap between disconnected components. Our evaluation leverages the Common Open Research Emulator (CORE) tool and the mobility scripting tools from the Naval Research Laboratory (NRL).
C1 [Scott, Keith; Refaei, Tamer; Trivedi, Nirav; Trinh, Jenny] Mitre Corp, Commun Network Engn & Anal Dept, Mclean, VA 22102 USA.
[Macker, Joseph P.] Naval Res Lab, Div Informat Technol, Washington, DC 20375 USA.
RP Scott, K (reprint author), Mitre Corp, Commun Network Engn & Anal Dept, Mclean, VA 22102 USA.
EM kscott@mitre.org; mrefaei@mitre.org; ntrivedi@mitre.org;
jtrinh@mitre.org; joseph.macker@nrl.navy.mil
NR 12
TC 6
Z9 6
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 1009
EP 1014
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500170
ER
PT J
AU Phillips, B
Tummala, M
McEachen, JC
AF Phillips, Brian
Tummala, Murali
McEachen, John C.
GP IEEE
TI State Based Multiple Channel Selection in Multi-Channel Wireless
Networks
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
DE Multi-channel wireless networks; ad hoc networks; channel selection;
state based; wireless networks
AB In this paper, we present an innovative scheme to favor the selection of M out of N available high-performing channels in multi-channel wireless networks through the application of states to individual channels. One channel selection scheme is random selection, which can lead to poor network performance when one or more data channels are disadvantaged. This is due to the inability of random selection to discriminate between high performing and disadvantaged channels. The novel proposed channel selection scheme is shown to perform nearly as well as the highest performing of N channels when one or more channels are disadvantaged. We develop a Markov-chain-based theoretical model and then present simulation results validating a significant performance increase of the proposed channel selection scheme.
C1 [Phillips, Brian; Tummala, Murali; McEachen, John C.] USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
RP Phillips, B (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
EM bephilli@nps.edu; mtummala@nps.edu; mceachen@nps.edu
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 1061
EP 1066
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500178
ER
PT J
AU Huchton, S
Xie, G
Beverly, R
AF Huchton, Scott
Xie, Geoffrey
Beverly, Robert
GP IEEE
TI Building and Evaluating a k-Resilient Mobile Distributed File System
Resistant to Device Compromise
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
AB Deploying mobile devices to frontline troops presents many potential benefits, e. g. situational awareness, enhanced communication capabilities, etc. However, security remains an impediment to realizing such capability. In this research, we develop and evaluate an approach to securing the non-volatile storage of a collection of mobile devices. Our technique relies on well-established cryptographic primitives, combining them in a unique way to meet military mission specific security and resiliency requirements. Specifically, we create MDFS, a distributed mobile file system using erasure coding, Shamir's threshold secret sharing, and the symmetric AES block cipher. The resulting system provides two important properties: (1) data at rest is protected even after total compromise of up to k devices, and (2) data is replicated within an infrastuctureless ad hoc network and, as such, resilient to device outages. We implement MDFS on Android mobile devices and achieve similar or equal to 10Mbps throughput in real-world performance experiments, suggesting that MDFS is suitable for a variety of practical workloads.
C1 [Huchton, Scott; Xie, Geoffrey; Beverly, Robert] USN, Dept Comp Sci, Postgrad Sch, Monterey, CA USA.
RP Huchton, S (reprint author), USN, Dept Comp Sci, Postgrad Sch, Monterey, CA USA.
EM sthuchto@nps.edu; xie@nps.edu; rbeverly@nps.edu
NR 20
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 1315
EP 1320
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500220
ER
PT J
AU Luo, J
Kang, M
AF Luo, Jim
Kang, Myong
GP IEEE
TI Risk Based Mobile Access Control (RiBMAC) Policy Framework
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
DE mobility; security; tactical; access control
AB Mobile devices are increasingly being deployed by enterprises, governments, and the military. Protecting sensitive data that will invariably reside on them is critical. Mobile devices cannot be protected by physical security the same way as stationary systems. Therefore, they must deploy strong internal protection mechanisms for access control. Policies for access control must be driven by context and risk in the environmental in which they operate. This is inherently different from traditional policy models that focus on the multi-user access control. We propose the Risk Based Mobile Access Control (RiBMAC) policy framework for mobile device access control. It uses risk factor abstractions to break down the complexity in the specification, management and evaluation of risk based policies. Its agent-centric approach can effectively integrate a large number of onboard sensors and risk assessment components in different hardware and operational configurations. RiBMAC is a simple yet powerful policy framework that is expressive, practical and scalable. RiBMAC, in conjunction with the appropriate enforcement mechanisms, can greatly improve security for tactical mobile devices.
C1 [Luo, Jim; Kang, Myong] USN, Res Lab, Ctr High Assurance Comp, Washington, DC 20375 USA.
RP Luo, J (reprint author), USN, Res Lab, Ctr High Assurance Comp, Washington, DC 20375 USA.
EM Jim.Luo@nrl.navy.mil; Myong.Kang@nrl.navy.mil
NR 17
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 1448
EP 1453
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500243
ER
PT J
AU Macker, J
Taylor, I
AF Macker, Joseph
Taylor, Ian
GP IEEE
TI INDI: Adapting the Multicast DNS Service Discovery Infrastructure in
Mobile Wireless Networks
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
AB Service-based discovery mechanisms for dynamic mobile ad-hoc and mesh networks require additional robustness and performance features beyond present practices. However, leveraging existing standards and application service interfaces where possible will aid in wider deployment. To achieve the latter, supporting standardized protocols is desirable, but present approaches focus on fixed Internet use and do not provide solutions suitable for self-organizing wireless architectures. We have previously reported on the merits of different profiles (proactive, reactive and opportunistic caching), the use of limited multi-hop multicast, and information exchange reduction to improve service discovery in wireless ad hoc environments, using our Independent Network Discovery Interface (INDI) discovery system. In this paper, we describe the integration of INDI functionality with an already widely deployed localized service discovery method, multicast DNS (mDNS). We show resulting INDI interoperability with mDNS and compare and contrast the underlying approaches, through the use of networking tools, to provide empirical evidence illustrating the advantages of INDI-mDNS, when applied in a MANET context.
C1 [Macker, Joseph] USN, Res Lab, Washington, DC 20375 USA.
[Taylor, Ian] Cardiff Univ, Sch Comp Sci, Cardiff, S Glam, Wales.
RP Macker, J (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM joseph.macker@nrl.navy.mil; Ian.J.Taylor@cs.cardiff.ac.uk
FU Office of Naval Research (ONR) Service Oriented Networks Operating in
MANET (SONOMA); Groupwise Tactical Edge networking (GTEN); Office of the
Assistant Secretary of Defense (OASD)
FX INDI work has been funded in part by the Office of Naval Research (ONR)
Service Oriented Networks Operating in MANET (SONOMA) project. Work in
developing mDNS interpoperability has been supported in part by the
Groupwise Tactical Edge networking (GTEN) effort under Networks Programs
within the Office of the Assistant Secretary of Defense (OASD), Research
and Engineering. The authors wish like to thank Brian Adamson for his
advice and SMF implementation used as an experimentation tool. We would
also like to thank Andrew Harrison and Justin Dean for their work on the
initial INDI implementation and experimentation efforts. Finally, we
would like to thank the JmDNS team, and in particular, Pierre Frisch,
who provided insight, guidance and exposed the timing interfaces for
JmDNS tasks that made this work possible.
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 1616
EP 1621
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500271
ER
PT J
AU Rickenbach, B
Griffin, P
Rush, J
Flanagan, J
Adamson, B
Macker, J
AF Rickenbach, Brent
Griffin, Peter
Rush, Jason
Flanagan, John
Adamson, Brian
Macker, Joseph
GP IEEE
TI Adaptive Data Delivery Over Disadvantaged, Dynamic Networks
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
AB Most applications and network protocols are designed under the assumption of a stable and consistent physical network infrastructure. However, the communications infrastructures of most military tactical networks are dynamic and dependent on mission CONOPS and network topology. Further, they are highly variable in their capabilities from one data link to the next. Consequently, it is difficult for standard applications and services to maintain reliable quality of service when transiting to a dynamic tactical network, or crossing the borders between different classes of military networks. Ultimately, this lack of network awareness impacts the quality and timeliness of actionable intelligence delivered to the warfighter.
General Dynamics and the Naval Research Laboratory (NRL) have collaborated on efforts to improve the reliable delivery of live video data across these disadvantaged tactical networks. We address the development of a network-aware video server, which senses network characteristics and dynamically transcodes video to meet the capacity of network between the server and clients.
End-to-end network characteristics are required to drive the video transcoder. These network attributes can either be derived from software methods by analyzing the network protocol, or using specialized network hardware (e.g. tactical radios, routers, or QoS devices). For this effort end-to-end network awareness was collected from the NACK- Oriented Reliable Multicast (NORM) [1] protocol operation. Hooks in the NORM protocol provide a network information service with access to path bandwidth, delay, and lost packets. The video server uses the network information service to adapt the video by adjusting frame size, frame rate, and compression according to current network conditions to deliver the video with minimal delay.
A comparison of how video is streamed over enterprise networks and the improved delivery methods made by General Dynamics and NRL for tactical networks is presented.
C1 [Rickenbach, Brent; Griffin, Peter; Rush, Jason; Flanagan, John] Gen Dynam Adv Informat Syst, Bloomington, MN USA.
[Adamson, Brian; Macker, Joseph] Naval Res Lab, Washington, DC USA.
RP Rickenbach, B (reprint author), Gen Dynam Adv Informat Syst, Bloomington, MN USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 1628
EP 1632
PG 5
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500273
ER
PT J
AU Lass, RN
Nguyen, DN
Millar, DW
Regli, WC
Macker, J
Adamson, RB
AF Lass, Robert N.
Nguyen, Duc N.
Millar, David W.
Regli, William C.
Macker, Joseph
Adamson, R. Brian
GP IEEE
TI An Evaluation of Serverless Group Chat
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
AB This paper presents empirical analysis of serverless, multi-user chat in multicast-capable tactical environments. The implemented group communications middleware is based on serverless XMPP messaging. We compare the effectiveness and performance of serverless messaging over multicast, as well as typical client server TCP messaging. The experiments are performed using the Common Open Research Emulator in conjunction with the Extendable Mobile Ad-Hoc Network Emulator, to provide a higher-fidelity emulation than previous work.
C1 [Lass, Robert N.; Nguyen, Duc N.; Millar, David W.; Regli, William C.] Drexel Univ, AJ Drexel ACIN Inst, Philadelphia, PA 19104 USA.
[Macker, Joseph; Adamson, R. Brian] Naval Res Lab, Div Informat Technol, Washington, DC 20375 USA.
RP Lass, RN (reprint author), Drexel Univ, AJ Drexel ACIN Inst, Philadelphia, PA 19104 USA.
EM urlass@drexel.edu; dn53@drexel.edu; dwm27@drexel.edu; regli@drexel.edu;
joseph.macker@nrl.navy.mil; brian.adamson@nrl.navy.mil
FU Groupwise Tactical Edge Networking (GTEN); Office of the Assistant
Secretary of Defense (OASD)
FX This XO serverless prototype development and analysis work has been
supported in part by the Groupwise Tactical Edge Networking (GTEN)
effort under Networks Programs within the Office of the Assistant
Secretary of Defense (OASD), Research and Engineering. The authors would
also like to thank Dr. Ian Taylor for the use of GUMP and other software
developments that support the XO work.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 1639
EP 1644
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500275
ER
PT J
AU Molnar, JA
Corretjer, I
Tavik, G
AF Molnar, Joseph A.
Corretjer, Ivan
Tavik, Gregory
GP IEEE
TI Integrated Topside - Integration of Narrowband and Wideband Array
Antennas for Shipboard Communications
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
DE Multifunction; Common Data Link; resource allocation; phased array; AESA
AB The Integrated Topside (INTOP) Program is an Innovative Naval Prototype effort initiated by the Office of Naval Research (ONR) to develop wideband multifunction RF system technology that will enable increased functionality through the employment of shared hardware and software resources to execute the mission objectives. An Electronic Warfare/Information Operations/Communications (EW/IO/Comm) Advanced Development Model (ADM) is one of the prototypes being developed under the INTOP program. ONR is also developing low cost narrow band phased arrays as part of the High Throughput Networking Infrastructure (HTNI) program to support communications in the Common Data Link (CDL) frequency range. This paper explores the challenges and benefits that could be achieved through an integration of both technologies.
The INTOP EW/IO/Comm program effort functionality encompasses the existing CDL spectrum with broader frequency coverage. Both the narrowband CDL array and the wideband INTOP array provide multi-beam array technology. However, the INTOP array provides greater flexibility in beam forming, interference nulling, and frequency coverage. Depending on the specific requirement for the communications link support, the CDL array set (four per ship) may provide as many as eight receive beams when used individually, or four beams when used in an elevation diversity configuration to mitigate multipath and other atmospheric effects. The INTOP receive array set (4 per ship) has the potential to support as many as 16 communication links or as few as four, when supporting the most distant communication links. As a combined asset, the receive antenna capacity addresses the Navy projections for the number of links to support Intelligence, Surveillance, and Reconnaissance (ISR) platforms. The transmit array is sized to similarly support the required number of links. In addition to the combined link support, the integration of the two arrays provides redundancy, multipath mitigation, frequency diversity, the potential to employ spatial separation to achieve the desired number of links within the existing frequency constraints, and the ability to allocate receive assets to enhance the frequency management of the ship to prevent interference and contention.
C1 [Molnar, Joseph A.] USN, Res Lab, Networks & Commun Syst Branch, Washington, DC 20375 USA.
[Corretjer, Ivan] Naval Res Lab, Transmiss Technol Branch, Washington, DC 20375 USA.
[Tavik, Gregory] Naval Res Lab, INTOP, Washington, DC 20375 USA.
RP Molnar, JA (reprint author), USN, Res Lab, Networks & Commun Syst Branch, Washington, DC 20375 USA.
FU Office of Naval Research
FX The authors would like to thank Betsy DeLong and Douglas Crowder of the
Office of Naval Research for their support of this research.
NR 7
TC 4
Z9 4
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 1802
EP 1807
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500301
ER
PT J
AU Ahrenholz, J
Goff, T
Adamson, B
AF Ahrenholz, Jeff
Goff, Tom
Adamson, Brian
GP IEEE
TI Integration of the CORE and EMANE Network Emulators
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
AB Researchers who evaluate networking protocols and applications can benefit significantly from the availability of flexible, open source tools. Network emulation has been one of the tools of choice for conducting experiments on commodity hardware, and for wireless MANET environments, in the absence of a possibly large number of radio devices. We present an easy-to-use system based on a combination of two such open source emulation tools. We describe integrating the Common Open Research Emulator (CORE), providing virtualization controlled by a graphical user interface, with the Extendable Mobile Ad-hoc Network Emulator (EMANE) framework that provides for more detailed radio models and scenarios. We discuss the benefits of integrating the two tools, along with challenges of this approach and how they were addressed. We address the performance experienced when using these more detailed link-and physical-layer models. Finally, we conclude with open issues and future directions.
C1 [Ahrenholz, Jeff; Goff, Tom] Boeing Res & Technol, Networked Syst Technol, Seattle, WA 98124 USA.
[Adamson, Brian] Naval Res Lab, Washington, DC 20375 USA.
RP Ahrenholz, J (reprint author), Boeing Res & Technol, Networked Syst Technol, Seattle, WA 98124 USA.
FU Network Communications Capability Program (NCCP) [5522]
FX This work was done in cooperation with the NRL Protean Research Group,
Code 5522 under the OSD-sponsored Network Communications Capability
Program (NCCP).
NR 14
TC 10
Z9 10
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 1870
EP 1875
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500312
ER
PT J
AU Claypool, DJ
Dean, J
AF Claypool, David J.
Dean, Justin
GP IEEE
TI ENHANCING THE SPECIFICATION OF NODE MOBILITY IN MOBILE AD-HOC NETWORKS
USING THE MOTION PLANNING FRAMEWORK
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
AB When modeling and simulating Mobile Ad-hoc Networks (MANETs), the importance of the represented mobility of the nodes has too often been downplayed: oversimplified, contrived to relatively simplistic random motion, and limited to a small set of notional motion patterns. Even when realistic motion is used, the scenarios are often highly static and deterministic. As such, there exists a need to be able to clearly define the motion of nodes in more complex patterns: both in the context of conceptual testing patterns, and also in realistic operational scenarios. This work introduces the features and usability of a ongoing development effort termed the Motion Planning Framework created by the US Naval Research Laboratory. The framework enables modelers, independent of a specific simulation environment, to succinctly express the motion of nodes in a scenario. The extensible language permits users to quickly and universally create arbitrarily complex node movements representing scenarios that more aptly represent real world behavior or more appropriately exercise a given system under test. This work introduces our approach towards creating this framework and gives several examples of how the language can be used.
C1 [Claypool, David J.; Dean, Justin] USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
RP Claypool, DJ (reprint author), USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
EM david.claypool@nrl.navy.mil; justin.dean@nrl.navy.mil
NR 12
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 2036
EP 2041
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500340
ER
PT J
AU Olds, K
Cole, R
Lord, B
Duke, M
Sherman, M
Spaulding, J
Boyd, J
AF Olds, Keith
Cole, Raymond, Jr.
Lord, Bruce
Duke, Martin
Sherman, Mathew
Spaulding, John
Boyd, John
GP IEEE
TI The DirecNet (TM) Standard Reference Architecture: A Roadmap for
Interoperability
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
AB The Open Group's DirecNet (TM) Task Force is an industry-led consortium consisting of twelve major aerospace firms. Its goal is to develop a vendor-neutral interoperability standard for a next generation directional networking waveform. The waveform developed will be IP-enabled, support the use of directional high bandwidth links, and the use of ad hoc mobile mesh networking. A key objective of the Task Force is to bring the advantages of commercial interoperability and standards development processes into the government arena. At this time, the Task Force has completed and released an overview and reference architecture volume as well the standard for a bandwidth-efficient PHY layer. This paper reviews the selected DirecNet architecture and on-going technical work of the consortium.
C1 [Olds, Keith] Harris Corp, Melbourne, FL 32919 USA.
[Cole, Raymond, Jr.] Naval Res Lab, Washington, DC 20002 USA.
[Lord, Bruce; Duke, Martin] Boeing Co, Chicago, IL 60602 USA.
[Sherman, Mathew] BAE Syst, Preston, Lancs, England.
[Spaulding, John] The Open Grp, Burlington, MA 01803 USA.
[Boyd, John] Cubic, San Diego, CA 92123 USA.
RP Olds, K (reprint author), Harris Corp, Melbourne, FL 32919 USA.
NR 2
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 2105
EP 2110
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500351
ER
PT J
AU Brock, D
Wasylyshyn, C
McClimens, B
Perzanowski, D
AF Brock, Derek
Wasylyshyn, Christina
McClimens, Brian
Perzanowski, Dennis
GP IEEE
TI Facilitating the Watchstander's Voice Communications Task in Future Navy
Operations
SO 2011 - MILCOM 2011 MILITARY COMMUNICATIONS CONFERENCE
LA English
DT Proceedings Paper
CT Military Communications Conference (MILCOM)
CY NOV 07-10, 2011
CL Baltimore, MD
DE concurrent voice communications; watchstander; serialized communications
monitoring; speech rate acceleration; intelligibility; attention;
comprehension; effort
AB Recent human performance research at the Naval Surface Warfare Center, Dahlgren Division (NSWCDD) has shown that increasing the number of concurrent voice communications tasks individual Navy watchstanders must handle is an uncompromising empirical barrier to streamlining crew sizes in future shipboard combat information centers. Subsequent work on this problem at the Naval Research Laboratory (NRL) has resulted in a serialized communications monitoring prototype (U.S. Patent Application Pub. No. US. 2007/0299657) that uses a patented NRL technology known as "pitch synchronous segmentation" (U.S. Patent 5,933,808) to accelerate buffered human speech up to 100% faster than its normal rate without a meaningful decline in intelligibility. In conjunction with this research effort, a series of ongoing human subjects studies at NRL has shown that rate-accelerated, serialized communications monitoring overwhelmingly improves performance measures of attention, comprehension, and effort in comparison to concurrent listening in the same span of time. This paper provides an overview of NRL's concurrent communications monitoring solution and summarizes the empirical performance questions addressed by, and the outcomes of, the Lab's associated program of listening studies.
C1 [Brock, Derek; Wasylyshyn, Christina; McClimens, Brian; Perzanowski, Dennis] USN, Res Lab, Navy Ctr Appl Res Artificial Intelligence, Washington, DC 20375 USA.
RP Brock, D (reprint author), USN, Res Lab, Navy Ctr Appl Res Artificial Intelligence, Code 5512, Washington, DC 20375 USA.
EM derek.brock@nrl.navy.mil
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0081-0
PY 2011
BP 2222
EP 2226
PG 5
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BYT03
UT WOS:000300083500371
ER
PT J
AU Rowe, N
Garfinkel, S
Beverly, R
Yannakogeorgos, P
AF Rowe, Neil
Garfinkel, Simson
Beverly, Robert
Yannakogeorgos, Panayotis
BE Ottis, R
TI Steps towards Monitoring Cyberarms Compliance
SO PROCEEDINGS OF THE 10TH EUROPEAN CONFERENCE ON INFORMATION WARFARE AND
SECURITY
LA English
DT Proceedings Paper
CT 10th European Conference on Information Warfare and Security (ECIW)
CY JUL 07-08, 2011
CL Tallinn Univ Technol, Inst Cybernet (IoC), Tallinn, ESTONIA
HO Tallinn Univ Technol, Inst Cybernet (IoC)
DE cyberweapons; cyberattacks; agreements; monitoring; forensics;
reversibility
AB Cyberweapons are difficult weapons to control and police. Nonetheless, technology is becoming available that can help. We propose here the underlying technology necessary to support cyberarms agreements. Cyberweapons usage can be distinguished from other malicious Internet traffic in that they are aimed precisely at targets which we can often predict in advance and can monitor. Unlike cybercriminals, cyberweapons use will have political goals, and thus attackers will likely not try hard to conceal themselves. Furthermore, cyberweapons are temperamental weapons that depend on flaws in software, and flaws can get fixed. This means that cyberweapons testing will be seen before a serious attack. As well, we may be able to find evidence of cyberweapons on computers seized during or after hostilities since cyberweapons have important differences from other software and are difficult to conceal on their development platforms. Recent advances in quick methods for assessing the contents of a disk drive can be used to rule out irrelevant data quickly. We also discuss methods for making cyberweapons more responsible by attribution and reversibility, and we discuss the kinds of international agreements we need to control them.
C1 [Rowe, Neil; Garfinkel, Simson; Beverly, Robert] USN, Postgrad Sch, Monterey, CA USA.
RP Rowe, N (reprint author), USN, Postgrad Sch, Monterey, CA USA.
EM ncrowe@nps.edu; slgarfin@nps.edu; rbeverly@nps.edu; yannakog1@gmail.com
NR 36
TC 0
Z9 0
U1 1
U2 1
PU ACAD CONFERENCES LTD
PI NR READING
PA CURTIS FARM, KIDMORE END, NR READING, RG4 9AY, ENGLAND
BN 978-1-908272-06-5
PY 2011
BP 221
EP 227
PG 7
WC Computer Science, Cybernetics; Computer Science, Theory & Methods
SC Computer Science
GA BYT87
UT WOS:000300245200028
ER
PT S
AU Gatewood, DS
Turner, CH
Dunlap, BI
AF Gatewood, Daniel S.
Turner, C. Heath
Dunlap, Brett. I.
BE Singhal, SC
Eguchi, K
TI Self-consistent-field Electrochemistry
SO SOLID OXIDE FUEL CELLS 12 (SOFC XII)
SE ECS Transactions
LA English
DT Proceedings Paper
CT 12th International Symposium on Solid Oxide Fuel Cells (SOFC)
CY MAY 01-06, 2011
CL Montreal, CANADA
SP Electrochem Soc, Inc (ECS), High Temp Mat, Battery & Energy Technol Div, SOFC Soc, Electrochem Soc (ECS), Dokiya Mem Fund
ID OXIDE FUEL-CELL; MONTE-CARLO SIMULATIONS; PT(111) SURFACE; OXYGEN;
ADSORPTION; KINETICS; ELECTROLYTE; IMPEDANCE; PLATINUM; SYSTEM
AB Two self-consistent-field Kinetic Monte Carlo (KMC) models are developed to simulate the operating cathode and anode of 9 mol% Yttria Stabilized Zirconia (YSZ) solid oxide fuel cells (SOFCs) using a database of elementary reaction rates obtained from experimental and first-principles rates. The rates are used in the unit cells of two asymmetrical YSZ lattices for the cathode and anode. KMC then gives the current-voltage (I-V) characteristics of this sequential set of elementary chemical reactions. The resistance of a single electrolyte lattice layer added to either simulation cell is extracted by Taylor-series interpolation of the I-V curves for simulation cells of different thickness. Its conductivity is obtained from this resistance using the cross-sectional area of the simulation cells. These conductivities are compared to experiment and a statistically independent model of this set of chemical reactions.
C1 [Gatewood, Daniel S.; Dunlap, Brett. I.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
RP Gatewood, DS (reprint author), USN, Res Lab, Div Chem, Code 6189, Washington, DC 20375 USA.
OI Dunlap, Brett/0000-0003-1356-6559
NR 26
TC 0
Z9 0
U1 0
U2 2
PU ELECTROCHEMICAL SOCIETY INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-212-7
J9 ECS TRANSACTIONS
PY 2011
VL 35
IS 1
BP 1055
EP 1063
DI 10.1149/1.3570086
PG 9
WC Electrochemistry
SC Electrochemistry
GA BYZ11
UT WOS:000300770102007
ER
PT S
AU Pomfret, MB
Steinhurst, DA
Owrutsky, JC
AF Pomfret, Michael B.
Steinhurst, Daniel A.
Owrutsky, Jeffrey C.
BE Singhal, SC
Eguchi, K
TI Thermal Imaging of Solid Oxide Fuel Cell Anode Degradation with Dry and
Wet Ethanol Fuel Flows
SO SOLID OXIDE FUEL CELLS 12 (SOFC XII)
SE ECS Transactions
LA English
DT Proceedings Paper
CT 12th International Symposium on Solid Oxide Fuel Cells (SOFC)
CY MAY 01-06, 2011
CL Montreal, CANADA
SP Electrochem Soc, Inc (ECS), High Temp Mat, Battery & Energy Technol Div, SOFC Soc, Electrochem Soc (ECS), Dokiya Mem Fund
ID IN-SITU; DIRECT-ALCOHOL; METHANOL; STEAM; SOFC; DECOMPOSITION;
CONVERSION; OXIDATION; CATALYSTS; SYSTEM
AB Near-infrared thermal imaging has been used to study the effects of humidifying ethanol fuel flows on the surface temperature of SOFC anodes. Temperatures were monitored for SOFCs operating with dry and wet ethanol fuel flows at 800 degrees C. The results indicate a dramatic decrease in the amount of carbon that is formed when ethanol flows are humidified. Humidifying the fuel stream reduces both the cooling observed under ethanol fuel flow conditions and the heating observed under post-fuel flow electrochemical oxidation conditions. The spatial variation of the temperature is also reduced. Thermal imaging is capable of detecting fatigue in functioning cells because temperature variations observed in situ provide early signs of SOFC failure, therefore thermal imaging is a viable system diagnostic.
C1 [Pomfret, Michael B.; Owrutsky, Jeffrey C.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
RP Pomfret, MB (reprint author), USN, Res Lab, Div Chem, 4555 Overlook Ave SW, Washington, DC 20375 USA.
RI Owrutsky, Jeffrey/K-7649-2012
NR 25
TC 2
Z9 2
U1 0
U2 9
PU ELECTROCHEMICAL SOCIETY INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-212-7
J9 ECS TRANSACTIONS
PY 2011
VL 35
IS 1
BP 1563
EP 1570
DI 10.1149/1.3570141
PG 8
WC Electrochemistry
SC Electrochemistry
GA BYZ11
UT WOS:000300770103007
ER
PT S
AU Burke, AA
Carreiro, LG
AF Burke, A. A.
Carreiro, L. G.
BE Singhal, SC
Eguchi, K
TI Analysis of Fuel Options for SOFC-based Power Systems in Undersea
Vehicles
SO SOLID OXIDE FUEL CELLS 12 (SOFC XII)
SE ECS Transactions
LA English
DT Proceedings Paper
CT 12th International Symposium on Solid Oxide Fuel Cells (SOFC)
CY MAY 01-06, 2011
CL Montreal, CANADA
SP Electrochem Soc, Inc (ECS), High Temp Mat, Battery & Energy Technol Div, SOFC Soc, Electrochem Soc (ECS), Dokiya Mem Fund
ID NI CATALYSTS; CELL; METHANOL
AB Previously demonstrated studies using anode recycle and carbon dioxide sequestration showed promising results for solid oxide fuel cell (SOFC) systems in unmanned undersea vehicles (UUVs). However, multiple heaters were used to maintain system temperature, and recent tests of a Delphi Corporation SOFC stack and fuel processor has uncovered thermal management issues regarding steam reformer operation in an anode-recycle loop. An experiment was attempted in which the fuel reformer was placed downstream of the SOFC stack and was to be driven (heated) by the anode exhaust from the stack. However, the maximum temperature achievable was only 400 degrees C, much lower than the 600 degrees C minimum for steam reforming of liquid hydrocarbon fuels. In order to provide more heat to the steam reformer, the combustor channel of Delphi's reformer was employed, and suitable conversion of JP-10 and S-8 liquid fuels was demonstrated. However, in a UUV application, continual operation of a burner (or CPOX reformer) will consume the limited supply of oxygen that is available. This extra consumption of oxygen for combustion detracts from the intended benefits of using energy-dense logistics fuels and highly efficient SOFCs. In a departure from NUWCDIVNPT's original focus on diesel-type (logistics) fuels, methane is looking more attractive for UUV applications, at least for first generation SOFC-powered UUVs. Even though the energy density for methane is roughly half that of diesel-type fuel, the savings in oxygen and carbon dioxide sorbent storage result in system energy metrics similar to those for S-8-based systems. In addition, the fuel processor control and system start-up can be greatly facilitated by using methane instead of a liquid hydrocarbon fuel. Switching to a methane fuel feed has the following advantages: high hydrogen-to-carbon ratio (this lowers O-2 and CO2 sorbent storage requirements); facilitates steam reforming versus diesel-type fuels; greater ease of start-up and system power transient control; risk mitigation for potential SOFC coking; and low boiling point, thus avoiding logistics of vaporizing diesel-type fuels and producing carbon residue.
C1 [Burke, A. A.; Carreiro, L. G.] USN, Undersea Warfare Ctr, Div Newport, Newport, RI 02841 USA.
RP Burke, AA (reprint author), USN, Undersea Warfare Ctr, Div Newport, Newport, RI 02841 USA.
NR 8
TC 3
Z9 3
U1 0
U2 6
PU ELECTROCHEMICAL SOCIETY INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-212-7
J9 ECS TRANSACTIONS
PY 2011
VL 35
IS 1
BP 2815
EP 2823
DI 10.1149/1.3570281
PG 9
WC Electrochemistry
SC Electrochemistry
GA BYZ11
UT WOS:000300770105034
ER
PT S
AU Srinivas, U
Monga, V
Raj, RG
AF Srinivas, Umamahesh
Monga, Vishal
Raj, Raghu G.
GP IEEE
TI AUTOMATIC TARGET RECOGNITION USING DISCRIMINATIVE GRAPHICAL MODELS
SO 2011 18TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)
SE IEEE International Conference on Image Processing ICIP
LA English
DT Proceedings Paper
CT 18th IEEE International Conference on Image Processing (ICIP)
CY SEP 11-14, 2011
CL Brussels, BELGIUM
SP IEEE, IEEE Signal Proc Soc (SPS)
ID CLASSIFIERS; NETWORKS
AB Of recent interest in automatic target recognition (ATR) is the problem of combining the merits of multiple classifiers. This is commonly done by "fusing" the soft-outputs of several classifiers into making a single decision. We observe that the improvement in recognition rates afforded by these approaches is due to the complementary yet correlated information captured by different features/signal representations that these individual classifiers employ. We present the use of probabilistic graphical models in modeling and capturing feature dependencies that are crucial for target classification. In particular, we develop a two-stage target recognition framework that combines the merits of distinct and sparse signal representations with discriminatively learnt graphical models. The first stage designs multiple projections yielding M > 1 sparse representations, while the second stage models each individual representation using graphs and combines these initially disjoint and simple graphical models into a thicker probabilistic graphical model. Experimental results show that our approach outperforms state-of-the art target classification techniques in terms of recognition rates. The use of graphical models is particularly meritorious when feature dimensionality is high and training is limited - a commonly observed constraint in synthetic aperture radar (SAR) imagery based target recognition.
C1 [Srinivas, Umamahesh; Monga, Vishal] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA.
[Raj, Raghu G.] US Naval Res Lab, Washington, DC USA.
RP Srinivas, U (reprint author), Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA.
RI chen, zhu/K-5923-2013
NR 16
TC 4
Z9 4
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-4880
BN 978-1-4577-1303-3
J9 IEEE IMAGE PROC
PY 2011
BP 33
EP 36
PG 4
WC Engineering, Electrical & Electronic; Imaging Science & Photographic
Technology
SC Engineering; Imaging Science & Photographic Technology
GA BYI89
UT WOS:000298962500009
ER
PT S
AU Zhang, W
Guo, YL
Meth, R
Sokoloff, H
Pope, A
Strat, T
Chellappa, R
AF Zhang, Wei
Guo, Yanlin
Meth, Reuven
Sokoloff, Harvey
Pope, Art
Strat, Tom
Chellappa, Rama
GP IEEE
TI VARIABLE REMAPPING OF IMAGES FROM VERY DIFFERENT SOURCES
SO 2011 18TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)
SE IEEE International Conference on Image Processing ICIP
LA English
DT Proceedings Paper
CT 18th IEEE International Conference on Image Processing (ICIP)
CY SEP 11-14, 2011
CL Brussels, BELGIUM
SP IEEE, IEEE Signal Proc Soc (SPS)
AB We present a system which registers image sequences acquired by very different sources, so that multiple views could be transformed to the same coordinates system. This enables the functionality of automatic object identification and confirmation across views and platforms. The capability of the system comes from three ingredients: 1) image context enlargement through temporal integration; 2) robust motion estimation using the G-RANSAC framework with a relaxed correspondence criteria; 3) constrained motion estimation within the G-RANSAC framework. The proposed system has worked successfully on thousands of frames from multiple collections with significant variations in scale and resolution.(1)
C1 [Zhang, Wei; Guo, Yanlin; Meth, Reuven; Pope, Art; Strat, Tom] SET Corp, 1005 Glebe Rd, Arlington, VA USA.
[Sokoloff, Harvey] Naval Air Syst Command, Patuxent River, MD USA.
[Chellappa, Rama] Univ Maryland, Ctr Automat Res CfAR, College Pk, MD 20742 USA.
RP Zhang, W (reprint author), SET Corp, 1005 Glebe Rd, Arlington, VA USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-4880
BN 978-1-4577-1303-3
J9 IEEE IMAGE PROC
PY 2011
BP 1501
EP 1504
PG 4
WC Engineering, Electrical & Electronic; Imaging Science & Photographic
Technology
SC Engineering; Imaging Science & Photographic Technology
GA BYI89
UT WOS:000298962501157
ER
PT S
AU Mace, M
Abdullah-Al-Mamun, K
Wang, SY
Gupta, L
Vaidyanathan, R
AF Mace, Michael
Abdullah-Al-Mamun, Khondaker
Wang, Shouyan
Gupta, Lalit
Vaidyanathan, Ravi
GP IEEE
TI Ensemble classification for robust discrimination of multi-channel,
multi-class tongue-movement ear pressure signals
SO 2011 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE
AND BIOLOGY SOCIETY (EMBC)
SE IEEE Engineering in Medicine and Biology Society Conference Proceedings
LA English
DT Proceedings Paper
CT 33rd Annual International Conference of the IEEE
Engineering-in-Medicine-and-Biology-Society (EMBS)
CY AUG 30-SEP 03, 2011
CL Boston, MA
SP IEEE, Engn Med & Biol Soc (EMBS)
AB In this paper we introduce a robust classification framework for tongue-movement ear pressure signals based around an ensemble voting methodology. The ensemble members are comprised of different combinations of sensor inputs i.e. two in-ear microphones and an acoustic gel sensor positioned under the chin of the individual and classification using three different base models. It is shown that by using all nine ensemble members when compared to the individual (base) models, the average misclassification rate can be reduced from 23% to 2.8% when using the majority voting strategy. The correct classification rate is improved from 76% to 92.4% when utilizing either the borda count or condorcet methods. This is achieved through a combination of rejection based on ambiguity in the ensemble and diversity in the misclassified instances across the ensemble members.
C1 [Mace, Michael; Vaidyanathan, Ravi] Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, London SW7 2AZ, England.
[Vaidyanathan, Ravi] US Navy, Postgrad Sch, Monterey, CA 93943 USA.
[Abdullah-Al-Mamun, Khondaker; Wang, Shouyan] Univ Southampton, Inst Sound & Vibrat Res, Southampton SO17 1BJ, Hants, England.
[Gupta, Lalit] Southern Illinois Univ, Dept Elect & Comp Engn, Carbondale, IL 62901 USA.
RP Mace, M (reprint author), Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, London SW7 2AZ, England.
EM m.mace11@imperial.ac.uk; kam1e08@soton.ac.uk; sy.wang@soton.ac.uk;
lgupta@siu.edu; rxv@case.edu
OI Mace, Michael/0000-0001-9599-448X
FU UK Engineering and Physical Sciences Research Council (EPSRC)
[EP/F01869X]
FX This research was supported by the UK Engineering and Physical Sciences
Research Council (EPSRC), grant EP/F01869X
NR 7
TC 3
Z9 3
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1557-170X
BN 978-1-4244-4122-8
J9 IEEE ENG MED BIO
PY 2011
BP 1733
EP 1736
PG 4
WC Engineering, Biomedical; Engineering, Electrical & Electronic
SC Engineering
GA BYH52
UT WOS:000298810001216
ER
PT S
AU Burton, TMW
Vaidyanathan, R
Burgess, SC
Turton, AJ
Melhuish, C
AF Burton, T. M. W.
Vaidyanathan, R.
Burgess, S. C.
Turton, A. J.
Melhuish, C.
GP IEEE
TI Development of a Parametric Kinematic Model of the Human Hand and a
Novel Robotic Exoskeleton
SO 2011 IEEE INTERNATIONAL CONFERENCE ON REHABILITATION ROBOTICS (ICORR)
SE International Conference on Rehabilitation Robotics ICORR
LA English
DT Proceedings Paper
CT IEEE International Conference on Rehabilitation Robotics
(ICORR)/International Neurorehabilitation Symposium (INRS)/International
Conference on Virtual Rehabilitation (ICVR)
CY JUN 27-JUL 01, 2011
CL ETH Zurich, Zurich, SWITZERLAND
SP IEEE, RA, EMB, Hocoma, You Rehab, Int Soc Virtual Rehabil (ISVR), Zentrum Ambulante Rehabil, MUNDUS, RITZ
HO ETH Zurich
ID BIOMECHANICAL MODEL; UPPER-LIMB; STROKE; THUMB; MOVEMENTS; THERAPY;
DESIGN; GRIP; ARM
AB This paper reports the integration of a kinematic model of the human hand during cylindrical grasping, with specific focus on the accurate mapping of thumb movement during grasping motions, and a novel, multi-degree-of-freedom assistive exoskeleton mechanism based on this model. The model includes thumb maximum hyper-extension for grasping large objects (similar to>50mm). The exoskeleton includes a novel four-bar mechanism designed to reproduce natural thumb opposition and a novel synchro-motion pulley mechanism for coordinated finger motion. A computer aided design environment is used to allow the exoskeleton to be rapidly customized to the hand dimensions of a specific patient. Trials comparing the kinematic model to observed data of hand movement show the model to be capable of mapping thumb and finger joint flexion angles during grasping motions. Simulations show the exoskeleton to be capable of reproducing the complex motion of the thumb to oppose the fingers during cylindrical and pinch grip motions.
C1 [Burton, T. M. W.] Univ Bristol, Bristol Robot Lab, Bristol BS8 1TH, Avon, England.
[Burton, T. M. W.] Univ West England, Bristol BS16 1QD, Avon, England.
[Vaidyanathan, R.; Burgess, S. C.] Univ Bristol, Dept Mech Engn, Bristol BSR 1TR, Avon, England.
[Vaidyanathan, R.] US Navy, Postgrad Sch, Dept Syst Engn, Monterey, CA 93940 USA.
RP Burton, TMW (reprint author), Univ Bristol, Bristol Robot Lab, Bristol BS8 1TH, Avon, England.
EM thomas.m.burton@bristol.ac.uk; r.vaidyanathan@bristol.ac.uk;
s.c.burgess@bristol.ac.uk
RI Turton, Ailie/C-1960-2014
FU University of the West of England, Faculty of Health and Life Sciences;
EPSRC Doctoral Training Apprenticeship
FX This work was supported by the University of the West of England,
Faculty of Health and Life Sciences under the direction of Dr Kevin
Foreman and an EPSRC Doctoral Training Apprenticeship.
NR 44
TC 0
Z9 0
U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1945-7898
BN 978-1-4244-9862-8
J9 INT C REHAB ROBOT
PY 2011
PG 7
WC Robotics; Rehabilitation
SC Robotics; Rehabilitation
GA BYK51
UT WOS:000299169800010
ER
PT S
AU Madgwick, SOH
Harrison, AJL
Vaidyanathan, R
AF Madgwick, Sebastian O. H.
Harrison, Andrew J. L.
Vaidyanathan, Ravi
GP IEEE
TI Estimation of IMU and MARG orientation using a gradient descent
algorithm
SO 2011 IEEE INTERNATIONAL CONFERENCE ON REHABILITATION ROBOTICS (ICORR)
SE International Conference on Rehabilitation Robotics ICORR
LA English
DT Proceedings Paper
CT IEEE International Conference on Rehabilitation Robotics
(ICORR)/International Neurorehabilitation Symposium (INRS)/International
Conference on Virtual Rehabilitation (ICVR)
CY JUN 27-JUL 01, 2011
CL ETH Zurich, Zurich, SWITZERLAND
SP IEEE, RA, EMB, Hocoma, You Rehab, Int Soc Virtual Rehabil (ISVR), Zentrum Ambulante Rehabil, MUNDUS, RITZ
HO ETH Zurich
ID KALMAN FILTER; TRACKING; ACCELEROMETER; CALIBRATION; ATTITUDE; SENSORS;
FUSION; SYSTEM
AB This paper presents a novel orientation algorithm designed to support a computationally efficient, wearable inertial human motion tracking system for rehabilitation applications. It is applicable to inertial measurement units (IMUs) consisting of tri-axis gyroscopes and accelerometers, and magnetic angular rate and gravity (MARG) sensor arrays that also include tri-axis magnetometers. The MARG implementation incorporates magnetic distortion compensation. The algorithm uses a quaternion representation, allowing accelerometer and magnetometer data to be used in an analytically derived and optimised gradient descent algorithm to compute the direction of the gyroscope measurement error as a quaternion derivative. Performance has been evaluated empirically using a commercially available orientation sensor and reference measurements of orientation obtained using an optical measurement system. Performance was also benchmarked against the propriety Kalman-based algorithm of orientation sensor. Results indicate the algorithm achieves levels of accuracy matching that of the Kalman based algorithm; < 0.8 degrees static RMS error, < 1.7 degrees dynamic RMS error. The implications of the low computational load and ability to operate at small sampling rates significantly reduces the hardware and power necessary for wearable inertial movement tracking, enabling the creation of lightweight, inexpensive systems capable of functioning for extended periods of time.
C1 [Madgwick, Sebastian O. H.; Harrison, Andrew J. L.; Vaidyanathan, Ravi] Univ Bristol, Dept Mech Engn, Bristol BS8 1TH, Avon, England.
[Vaidyanathan, Ravi] US Navy, Postgrad Sch, Dept Syst Engn, Monterey, CA 93940 USA.
RP Madgwick, SOH (reprint author), Univ Bristol, Dept Mech Engn, Bristol BS8 1TH, Avon, England.
EM s.madgwick@bristol.ac.uk; andrew.j.l.harrison@bristol.ac.uk;
r.vaidyanathan@bristol.ac.uk
NR 43
TC 0
Z9 0
U1 3
U2 14
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1945-7898
BN 978-1-4244-9862-8
J9 INT C REHAB ROBOT
PY 2011
PG 7
WC Robotics; Rehabilitation
SC Robotics; Rehabilitation
GA BYK51
UT WOS:000299169800011
ER
PT S
AU Lee, JS
Ainsworth, TL
Wang, YT
AF Lee, Jong-Sen
Ainsworth, Thomas L.
Wang, Yanting
GP IEEE
TI RECENT ADVANCES IN SCATTERING MODEL-BASED DECOMPOSITIONS: AN OVERVIEW
SO 2011 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 24-29, 2011
CL Vancouver, CANADA
SP IEEE, Inst Elect & Elect Engineers Geosci & Remote Sensing Soc (IEEE GRSS)
DE Polarimetric SAR; Model-based scattering decomposition
ID COMPENSATION; POLSAR
AB In the last decade, the three-component polarimetric scattering decomposition by Freeman and Durden has stimulated research and applications in model-based decompositions. In this paper, we will review recent advances in the scattering models, focusing on the negative power problem and its mitigation, the problem of the reflection symmetry assumption, and the effect of orientation angle compensation. An extended decomposition based on the extended Bragg model is also proposed. Polarimetric SAR images illustrate our approach.
C1 [Lee, Jong-Sen; Ainsworth, Thomas L.; Wang, Yanting] USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
RP Lee, JS (reprint author), USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
EM jong_sen_lee@hotmail.com
NR 19
TC 8
Z9 9
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4577-1005-6
J9 INT GEOSCI REMOTE SE
PY 2011
BP 9
EP 12
DI 10.1109/IGARSS.2011.6048884
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BXX72
UT WOS:000297496300003
ER
PT S
AU Hwang, PA
Perrie, W
Zhang, BA
AF Hwang, Paul A.
Perrie, William
Zhang, Biao
GP IEEE
TI WIND RETRIEVAL WITH CROSS-POLARIZED SAR RETURNS
SO 2011 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 24-29, 2011
CL Vancouver, CANADA
SP IEEE, Inst Elect & Elect Engineers Geosci & Remote Sensing Soc (IEEE GRSS)
C1 [Hwang, Paul A.] USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
[Perrie, William; Zhang, Biao] Bedford Inst Oceanograp, Fisheries & Oceans Canada, Bedford, NS, Canada.
RP Hwang, PA (reprint author), USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
EM paul.hwang@nrl.navy.mil; perriew@mar.dfo-mpo.gc.ca;
iocas.zhangbiao@yahoo.com
FU Office of Naval Research; NRL [NRL/PP/7260-11-0186]
FX This work is sponsored by the Office of Naval Research; NRL contribution
number NRL/PP/7260-11-0186.
NR 4
TC 0
Z9 0
U1 2
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4577-1005-6
J9 INT GEOSCI REMOTE SE
PY 2011
BP 1330
EP 1333
DI 10.1109/IGARSS.2011.6049445
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BXX72
UT WOS:000297496301097
ER
PT S
AU Lee, JS
Ainsworth, TL
Chen, KS
Hajnsek, I
AF Lee, Jong-Sen
Ainsworth, Thomas L.
Chen, Kun-Shan
Hajnsek, Irena
GP IEEE
TI TERRAIN CATEGORIZATION BASED ON SCATTERING MECHANISMS FOR SINGLE-POL
HIGH-RESOLUTION TERRASAR-X IMAGES
SO 2011 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 24-29, 2011
CL Vancouver, CANADA
SP IEEE, Inst Elect & Elect Engineers Geosci & Remote Sensing Soc (IEEE GRSS)
DE Single-Pol SAR; Image analysis
ID SAR IMAGERY
AB In this paper, we propose a terrain categorization algorithm for single-polarization high-resolution SAR imagery, and coded the terrain categories by colors that resemble Pauli decomposition color coding based on scattering mechanisms of PolSAR data. The proposed algorithm emphasizes preserving high resolution and making information dissemination easier for single-pol SAR data.
C1 [Lee, Jong-Sen; Ainsworth, Thomas L.] USN, Res Lab, Washington, DC 20375 USA.
[Chen, Kun-Shan] Natl Cent Univ, Chungli, Taiwan.
[Hajnsek, Irena] German Aerosp Ctr DLR, Wessling, Germany.
RP Lee, JS (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 4
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4577-1005-6
J9 INT GEOSCI REMOTE SE
PY 2011
BP 3606
EP 3609
DI 10.1109/IGARSS.2011.6050004
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BXX72
UT WOS:000297496303147
ER
PT S
AU Ainsworth, TL
Williams, ML
AF Ainsworth, T. L.
Williams, M. L.
GP IEEE
TI A SIMULATION STUDY OF TOPOGRAPHIC EFFECTS ON POLSAR CLASSIFICATION OF
FORESTS AND CROPS
SO 2011 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 24-29, 2011
CL Vancouver, CANADA
SP IEEE, Inst Elect & Elect Engineers Geosci & Remote Sensing Soc (IEEE GRSS)
DE Polarimetry; Synthetic Aperture Radar; Classification
ID SCATTERING MODEL; DECOMPOSITION
AB We investigate the dependence of polarimetric decomposition techniques upon terrain and vegetation canopy properties. We establish a physics-based model which highlights the interdependence of scattering mechanisms, and employ a simulation which encapsulates this combination of scattering theory and Synthetic Aperture Radar (SAR) imaging theory. We use the simulation to calculate polarimetric SAR images of forested terrain with high fidelity, and perform polarimetric decomposition analysis on the simulated data. Correcting for terrain azimuth slope leaves a residual dependence in polarimetric response that can be interpreted through the dependence of scattering on the terrain and imaging geometry. We will apply a similar analysis to POLSAR data from RADARSAT-2 and PALSAR to collaborate the model predictions.
C1 [Ainsworth, T. L.] USN, Res Lab, Washington, DC 20375 USA.
[Williams, M. L.] Cooperative Res Ctr Spatial Informat, Melbourne, Vic, Australia.
RP Ainsworth, TL (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 11
TC 2
Z9 2
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4577-1005-6
J9 INT GEOSCI REMOTE SE
PY 2011
BP 4107
EP 4110
DI 10.1109/IGARSS.2011.6050136
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BXX72
UT WOS:000297496304018
ER
PT S
AU Flynn, L
Rault, D
Jaross, G
Petropavlovskikh, I
Long, C
Hornstein, J
Beach, E
Yu, W
Niu, J
Swales, D
AF Flynn, L.
Rault, D.
Jaross, G.
Petropavlovskikh, I.
Long, C.
Hornstein, J.
Beach, E.
Yu, W.
Niu, J.
Swales, D.
GP IEEE
TI NPOESS PREPARATORY PROJECT VALIDATION PLANS FOR THE OZONE MAPPING AND
PROFILER SUITE
SO 2011 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 24-29, 2011
CL Vancouver, CANADA
SP IEEE, Inst Elect & Elect Engineers Geosci & Remote Sensing Soc (IEEE GRSS)
DE Ozone; Remote Sensing; Validation
ID OMPS
AB NOAA, through the Joint Polar Satellite System (JPSS) program, in partnership with National Aeronautical Space Administration (NASA), will launch the NPOESS Preparatory Project (NPP) satellite, a risk reduction and data continuity mission, prior to the first operational JPSS launch. The JPSS program will execute the NPP Calibration and Validation (Cal/Val) program to ensure the data products comply with the requirements of the sponsoring agencies.
The Ozone Mapping and Profiler Suite (OMPS) consists of two telescopes feeding three detectors measuring solar radiance scattered by the Earth's atmosphere and solar irradiance by using diffusers. The measurements are used to generate estimates of total column ozone and vertical ozone profiles. The validation efforts will make use of external resources in the form of ground-based and satellite measurements for comparisons and internal consistency methods developed over the last thirty years.
This paper provides information and references for the OMPS instrument, measurements, and products and some examples of components of the Cal/Val Plan with emphasis on the collaborative data and analysis techniques for the validation of the NPP OMPS environmental data products. Results for existing/proxy data sets are described to demonstrate the progress made in developing tools, creating and collecting test data, and expanding monitoring capabilities in preparation for the post-launch activities.
C1 [Flynn, L.] NOAA NESDIS, 5200 Auth Rd, Camp Springs, MD 20746 USA.
[Rault, D.] NASA, LaRC, Hampton 23681, VA USA.
[Jaross, G.] SSAI, Greenbelt, MD 20771 USA.
[Petropavlovskikh, I.] NOAA, ESRL, CIRES, Boulder, CO 80303 USA.
[Long, C.] NOAA, NWS Camp Springs, Camp Springs, MD 20746 USA.
[Hornstein, J.] Naval Res Lab, Washington, DC 20375 USA.
[Beach, E.; Niu, J.; Swales, D.] IMSG, Camp Springs, MD 20746 USA.
[Yu, W.] Dell Syst, Camp Springs, MD 20746 USA.
RP Flynn, L (reprint author), NOAA NESDIS, 5200 Auth Rd, Camp Springs, MD 20746 USA.
RI Beach, Eric/F-5576-2010; Flynn, Lawrence/B-6321-2009
OI Flynn, Lawrence/0000-0001-6856-2614
NR 10
TC 1
Z9 2
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4577-1005-6
J9 INT GEOSCI REMOTE SE
PY 2011
BP 4161
EP 4163
DI 10.1109/IGARSS.2011.6050148
PG 3
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BXX72
UT WOS:000297496304032
ER
PT S
AU Saintval, WJ
Hayward, TJ
AF Saintval, Wendell J.
Hayward, Thomas J.
GP IEEE
TI Modulation of a high-frequency shallow-water acoustic channel by sea
surface waves: 3-D PE-based modeling
SO 2011 IEEE - OCEANS SPAIN
SE OCEANS-IEEE
LA English
DT Proceedings Paper
CT IEEE OCEANS Conference
CY JUN 06-09, 2011
CL Santander, SPAIN
SP IEEE
ID ROUGH BOUNDARIES; SCATTERING; PROPAGATION
AB The three-dimensional parabolic equation acoustic propagation model (3DPE) of Collins and Chin-Bing is adapted to investigate the propagation of a high-frequency (2-kHz) signal in a shallow-water acoustic channel under two-dimensional ocean surfaces disturbed by gravity and capillary waves. Empirically-derived surface wave-number spectra of Pierson and Moskowitz and of Donelan and Pierson are used to construct realizations of stationary Gaussian models of the sea surface. The modified 3DPE model is applied to compute the acoustic field in a waveguide consisting of two isovelocity layers (water and thick sediment). The effects of scattering by the sea surface on the vertical/azimuthal distribution of energy arriving at the receiver are investigated by (1) beamforming the computed acoustic field over subsets of the 2-D computational mesh at the receiver range and (2) computing horizontal and vertical field correlation across subsets of the mesh. For the case of an isotropic surface wave spectrum, the field correlation estimates are derived by averaging correlation samples over multiple 2-D subarrays placed over 360 degrees of azimuth. The angle dependence of the beam responses and the depth and cross-range dependence of the field correlation are interpreted in terms of the surface scattering effects.
C1 [Saintval, Wendell J.] ASEE NRL Postdoctoral Fellowship Program, Washington, DC 20375 USA.
[Hayward, Thomas J.] Naval Res Lab, Washington, DC 20375 USA.
RP Saintval, WJ (reprint author), ASEE NRL Postdoctoral Fellowship Program, Washington, DC 20375 USA.
FU Office of Naval Research
FX This work was supported by the Office of Naval Research.
NR 11
TC 0
Z9 0
U1 1
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0197-7385
J9 OCEANS-IEEE
PY 2011
PG 6
WC Automation & Control Systems; Engineering, Electrical & Electronic;
Robotics
SC Automation & Control Systems; Engineering; Robotics
GA BYN28
UT WOS:000299429000036
ER
PT S
AU Yang, TC
AF Yang, T. C.
GP IEEE
TI Output SNR of Time-Reversal Based Underwater Acoustic Communications
SO 2011 IEEE - OCEANS SPAIN
SE OCEANS-IEEE
LA English
DT Proceedings Paper
CT IEEE OCEANS Conference
CY JUN 06-09, 2011
CL Santander, SPAIN
SP IEEE
ID DECISION-FEEDBACK EQUALIZER; PASSIVE-PHASE CONJUGATION
AB While one generally expects the output signal-to-noise ratio (OSNR) to increase with the number of receivers and decrease with increasing channel estimation error, to determine their exact relationship for a given channel, a channel model is normally required as the OSNR is dependent on the number of tap coefficients which are different for different channels having different multipath spread. This paper shows, supported by experimental data from different oceans, that the increase of OSNR with the number of diverse (or effective) receivers, and the decrease of OSNR with the channel estimation (data estimation) error follow a universal relationship using the time-reversal or correlation-based equalizer, despite the fact that the channels have very different properties. The reason is due to the fact that the OSNR is a function of the q function, the auto-correlation of the received impulse responses summed over all receiver channels, and the q function is approximately the same for all the data.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Yang, TC (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 13
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0197-7385
J9 OCEANS-IEEE
PY 2011
PG 6
WC Automation & Control Systems; Engineering, Electrical & Electronic;
Robotics
SC Automation & Control Systems; Engineering; Robotics
GA BYN28
UT WOS:000299429000027
ER
PT S
AU Yang, TC
AF Yang, T. C.
GP IEEE
TI Characteristics of underwater acoustic communication channels in shallow
water
SO 2011 IEEE - OCEANS SPAIN
SE OCEANS-IEEE
LA English
DT Proceedings Paper
CT IEEE OCEANS Conference
CY JUN 06-09, 2011
CL Santander, SPAIN
SP IEEE
ID VARIABILITY
AB Underwater acoustic channels are band-limited and reverberant, posing many obstacles to reliable, phase-coherent acoustic communications. While many high frequency communication experiments have been conducted in shallow water, few have carried out systematic studies on the channel properties at a time scale relevant for communications. To aid the communication system design, this paper analyzes at-sea data collected in shallow water under various conditions to illustrate how the ocean environments (sea surface waves, and random ocean medium) can affect the signal properties. Channel properties studied include amplitude and phase variations, and temporal coherence of individual paths as well as the temporal and spatial coherence of multipaths at different time scales. Reasons for the coherence loss are hypothesized.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Yang, TC (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 8
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0197-7385
J9 OCEANS-IEEE
PY 2011
PG 8
WC Automation & Control Systems; Engineering, Electrical & Electronic;
Robotics
SC Automation & Control Systems; Engineering; Robotics
GA BYN28
UT WOS:000299429000026
ER
PT J
AU Grbovic, D
Alves, F
Kearney, B
Apostolos, K
Karunasiri, G
AF Grbovic, Dragoslav
Alves, Fabio
Kearney, Brian
Apostolos, Karamitros
Karunasiri, Gamani
GP IEEE
TI Optimization of THz Absorption in Thin Films
SO 2011 IEEE SENSORS
LA English
DT Proceedings Paper
CT 10th IEEE Conference on Sensors
CY OCT 28-31, 2011
CL Limerick, IRELAND
SP IEEE, IEEE SENSORS Council, ANALOG DEVICES, Failte Ireland, irelandinspires.com, Silicon Labs, Sci Fdn Ireland (SFI), Intel, Competence Ctr, Microelect
ID QUANTUM CASCADE LASER
AB In this paper, we report on experimentally verified models, which assist in the design and fabrication of either thin metal films, with high broad-band absorption in the 3-5 THz spectral region, or thin metatamaterial structures of nearly 100% absorption at a specific, resonant, THz frequency. The THz absorption properties of the structures were modeled using COMSOL finite element modeling software. Optimized thin metal films and thin metamaterial structures were fabricated using standard microfabrication processes on Si substrates. The THz spectral characteristics of the structures were probed using FTIR spectrometer in the reflection mode. The measured THz reflection, from thin film of both broad-band and resonant metamaterial structures, exhibit excellent agreement with their respective models. Both types of absorbers can be incorporated in the fabrication of MEMS-based THz thermal sensors operating in active mode with quantum cascade laser (QCL) sources.
C1 [Grbovic, Dragoslav; Alves, Fabio; Kearney, Brian; Apostolos, Karamitros; Karunasiri, Gamani] USN, Postgrad Sch, Dept Phys, Monterey, CA 93943 USA.
RP Grbovic, D (reprint author), USN, Postgrad Sch, Dept Phys, Monterey, CA 93943 USA.
EM dgrbovic@nps.edu
NR 6
TC 0
Z9 0
U1 1
U2 7
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-9289-3
PY 2011
BP 172
EP 175
PG 4
WC Engineering, Electrical & Electronic; Instruments & Instrumentation;
Physics, Applied
SC Engineering; Instruments & Instrumentation; Physics
GA BYR66
UT WOS:000299901200042
ER
PT J
AU Mah, ML
Armstrong, PR
Kim, SS
Carney, JR
Lightstone, JM
Talghader, JJ
AF Mah, Merlin L.
Armstrong, Philip R.
Kim, Sangho S.
Carney, Joel R.
Lightstone, James M.
Talghader, Joseph J.
GP IEEE
TI Thermal History Sensing inside High-Explosive Environments using
Thermoluminescent Microparticles
SO 2011 IEEE SENSORS
LA English
DT Proceedings Paper
CT 10th IEEE Conference on Sensors
CY OCT 28-31, 2011
CL Limerick, IRELAND
SP IEEE, IEEE SENSORS Council, ANALOG DEVICES, Failte Ireland, irelandinspires.com, Silicon Labs, Sci Fdn Ireland (SFI), Intel, Competence Ctr, Microelect
ID LIF TLD-100; KINETICS; LUMINESCENCE; ORDER
AB Thermoluminescent LiF:Mg,Ti (TLD-100) microparticle sensors are demonstrated to record the thermal history of the region near a detonated high explosive. Microparticles were gamma-irradiated to fill their charge-carrier traps and then exposed to the detonation of 20 g of a plastic bonded explosive formulation containing HMX and Al particles at a test distance of approximately 22 cm from the center of the detonation. The thermal history was reconstructed by measuring the thermoluminescent signature of the traps and matching it to appropriate models. The trap populations derived from luminescence measurements and modeling indicate that the particles experienced a maximum temperature of 240 degrees C, then cooled to 1 degrees C above ambient temperature within 0.4 seconds. The resulting glow curve intensity is calculated to match the observed post-detonation signal to 3% averaged over the comparison values used for reconstruction.
C1 [Mah, Merlin L.; Armstrong, Philip R.; Kim, Sangho S.; Talghader, Joseph J.] Univ Minnesota, Minneapolis, MN 55455 USA.
[Carney, Joel R.; Lightstone, James M.] Indian Head Div, Naval Surface Warfare Ctr, Indian Head, MD 20640 USA.
RP Mah, ML (reprint author), Univ Minnesota, Minneapolis, MN 55455 USA.
EM joey@umn.edu
FU Defense Threat Reduction Agency [HDTRA1-10-0007]; NSF NNIN; MRFN
FX This work was supported by the Defense Threat Reduction Agency
(HDTRA1-10-0007). Portions of this work were performed at facilities in
the NSF NNIN and MRFN programs.
NR 8
TC 2
Z9 2
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-9289-3
PY 2011
BP 1269
EP 1272
PG 4
WC Engineering, Electrical & Electronic; Instruments & Instrumentation;
Physics, Applied
SC Engineering; Instruments & Instrumentation; Physics
GA BYR66
UT WOS:000299901200307
ER
PT J
AU Cranch, GA
Miller, GA
Askins, CG
Kirkendall, CK
Bartolo, RE
AF Cranch, G. A.
Miller, G. A.
Askins, C. G.
Kirkendall, C. K.
Bartolo, R. E.
GP IEEE
TI Remotely-interrogated three-axis fiber laser magnetometer
SO 2011 IEEE SENSORS
LA English
DT Proceedings Paper
CT 10th IEEE Conference on Sensors
CY OCT 28-31, 2011
CL Limerick, IRELAND
SP IEEE, IEEE SENSORS Council, ANALOG DEVICES, Failte Ireland, irelandinspires.com, Silicon Labs, Sci Fdn Ireland (SFI), Intel, Competence Ctr, Microelect
AB A novel fiber laser magnetometer, designed for seabed-mounted surveillance arrays, is described. The sensor, comprising a metalized fiber laser attached to a nonmagnetic bridge, utilizes the Lorentz force generated in a magnetic field to detect small changes in the earth's field. Three orthogonally mounted sensors measure each component of the field through high-resolution strain measurements, encoded as frequency shifts of the fiber lasers. The sensor node, incorporating three orthogonally mounted magnetic field sensors and a MEMS inclinometer, is qualified to an operating depth of 100 m and connected by a 1 km fiber-optic cable to the interrogation electronics.
C1 [Cranch, G. A.; Miller, G. A.; Askins, C. G.; Kirkendall, C. K.] USN, Res Lab, Div Opt Sci, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[Bartolo, R. E.] Univ Maryland, Dept Elect & Comp Engn, College Pk, MD 20742 USA.
RP Cranch, GA (reprint author), USN, Res Lab, Div Opt Sci, 4555 Overlook Ave SW, Washington, DC 20375 USA.
FU U.S. Naval Research Laboratory 6.2 Base Program; Navy International
Programs Office
FX This work was supported in part by the U.S. Naval Research Laboratory
6.2 Base Program and the Navy International Programs Office. The
associate editor coordinating the review of this paper and approving it
for publication was Prof. Elfed Lewis.
NR 9
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-9289-3
PY 2011
BP 2006
EP 2009
PG 4
WC Engineering, Electrical & Electronic; Instruments & Instrumentation;
Physics, Applied
SC Engineering; Instruments & Instrumentation; Physics
GA BYR66
UT WOS:000299901200490
ER
PT S
AU Foley, MP
Seo, DM
Boyle, PD
Henderson, WA
De Long, HC
Trulove, PC
AF Foley, M. P.
Seo, D. M.
Boyle, P. D.
Henderson, W. A.
De Long, H. C.
Trulove, P. C.
BE Minteer, S
TI Phase Behavior and Solvation of Lithium Triflate in gamma-Butyrolactone
SO GRAHAME AWARD SYMPOSIUM AND PHYSICAL AND ANALYTICAL ELECTROCHEMISTRY
(GENERAL) - 219TH ECS MEETING
SE ECS Transactions
LA English
DT Proceedings Paper
CT Grahame Award Symposium/Physical and Analytical Electrochemistry General
Session/219th Meeting of the Electrochemical-Society
CY MAY 01-06, 2011
CL Montreal, CANADA
SP Electrochem Soc (ECS), Phys & Analyt Electrochem
ID POLYMER ELECTROLYTES; POLY(PROPYLENE OXIDE); NACF3SO3; CRYSTALLINE;
TEMPERATURE; COMPLEXES; LICF3SO3; LICLO4
AB Data describing the concentration and temperature dependent solvation and phase behavior of lithium trifluoromethanesulfonate (LiTf) in gamma-butyrolactone (GBL) is presented. Differential scanning calorimetry (DSC), Raman spectroscopy and X-ray diffraction measurements are employed to elucidate the electrolyte interactions. DSC analysis show the presence of a crystallinity gap at concentrations between 2.56:1 and 5.00:1 GBL:LiTf (mole: mole) and a high melting solvate in more concentrated samples. Raman spectroscopic analysis indicates that the coordination of ions in the high melting solvate undergoes temperature dependent transitions. X-ray diffraction analysis showed that lithium triflate forms a 1:1 aggregated solvate having 6 ion pair coordinated by 6 solvent molecules. Taken together, data suggest ion transport in electrolytes is influenced by solvation.
C1 [Foley, M. P.; Trulove, P. C.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
RP Foley, MP (reprint author), USN Acad, Dept Chem, Annapolis, MD 21402 USA.
NR 18
TC 3
Z9 3
U1 0
U2 12
PU ELECTROCHEMICAL SOCIETY INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-289-9
J9 ECS TRANSACTIONS
PY 2011
VL 35
IS 29
BP 3
EP 8
DI 10.1149/1.3645607
PG 6
WC Chemistry, Analytical; Chemistry, Physical; Electrochemistry
SC Chemistry; Electrochemistry
GA BYZ92
UT WOS:000300874500001
ER
PT S
AU Calhoun, RL
Bard, AJ
AF Calhoun, R. L.
Bard, A. J.
BE Minteer, S
TI Study of the EC' Mechanism by Scanning Electrochemical Microscopy (SECM)
SO GRAHAME AWARD SYMPOSIUM AND PHYSICAL AND ANALYTICAL ELECTROCHEMISTRY
(GENERAL) - 219TH ECS MEETING
SE ECS Transactions
LA English
DT Proceedings Paper
CT Grahame Award Symposium/Physical and Analytical Electrochemistry General
Session/219th Meeting of the Electrochemical-Society
CY MAY 01-06, 2011
CL Montreal, CANADA
SP Electrochem Soc (ECS), Phys & Analyt Electrochem
ID ELECTRON-TRANSFER KINETICS; WATER OXIDATION; POLYNUCLEOTIDE BINDING;
METAL-COMPLEXES; FEEDBACK MODE; VOLTAMMETRY; RUTHENIUM; CYSTEINE; RATES
AB Scanning electrochemical microscopy (SECM) experiments were undertaken to study the EC'mechanism, e.g. where a product of the electrode reaction reacts to regenerate the starting material. Digital simulations of the two dimensional SECM were carried out and the results tested with the known EC' system of Fe(CN)(6)(4-) / cysteine for validation. The results were then used in SECM experiments with Ru(phen)(2)dppz(2+), a known DNA intercalator, to study the instability of the oxidized form in the absence and presence of DNA.
C1 [Calhoun, R. L.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
RP Calhoun, RL (reprint author), USN Acad, Dept Chem, Annapolis, MD 21402 USA.
NR 31
TC 4
Z9 4
U1 1
U2 8
PU ELECTROCHEMICAL SOCIETY INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-289-9
J9 ECS TRANSACTIONS
PY 2011
VL 35
IS 29
BP 39
EP 51
DI 10.1149/1.3645611
PG 13
WC Chemistry, Analytical; Chemistry, Physical; Electrochemistry
SC Chemistry; Electrochemistry
GA BYZ92
UT WOS:000300874500005
ER
PT J
AU Brown, G
Kline, J
Thomas, A
Washburn, A
Wood, K
AF Brown, Gerald
Kline, Jeff
Thomas, Adam
Washburn, Alan
Wood, Kevin
TI A Game-Theoretic Model for Defense of an Oceanic Bastion Against
Submarines
SO MILITARY OPERATIONS RESEARCH
LA English
DT Article
AB We develop a game-theoretic model called BASTION to guide the employment of antisubmarine warfare (ASW) platforms such as ships and aircraft that are defending a stationary oceanic bastion from attack by hostile submarines. The model is an example of a two-person zero-sum game with some additional variables (ship locations) that are under the control of the maximizing defender, but known to the minimizing attacker. The attacker, knowing the ship locations, but not the locations of other platforms such as aircraft, must select a path to the bastion. The probability of detecting the attacker as it follows this path is the objective shared by the opponents.
C1 [Brown, Gerald; Kline, Jeff; Thomas, Adam; Washburn, Alan; Wood, Kevin] Naval Postgrad Sch, Dept Operat Res, Monterey, CA USA.
RP Brown, G (reprint author), Naval Postgrad Sch, Dept Operat Res, Monterey, CA USA.
EM gbrown@nps.edu; jekline@nps.edu; athomas@nps.edu; awashburn@nps.edu;
kwood@nps.edu
OI Wood, Kevin/0000-0002-0311-8712
NR 18
TC 6
Z9 6
U1 1
U2 8
PU MILITARY OPERATIONS RESEARCH SOC
PI ALEXANDRIA
PA 1703 N BEAUREGARD ST, STE 450, ALEXANDRIA, VA 22311-1717 USA
SN 0275-5823
J9 MIL OPER RES
JI Mil. Oper. Res.
PY 2011
VL 16
IS 4
BP 25
EP 40
DI 10.5711/1082598316425
PG 16
WC Operations Research & Management Science
SC Operations Research & Management Science
GA 902FF
UT WOS:000301023300002
ER
PT J
AU Barton, RJ
Moss, GR
Smith, KB
AF Barton, Robert J., III
Moss, Geoffrey R.
Smith, Kevin B.
GP IEEE
TI Scattered Acoutic Intensity Field Measurements of a Rigid Motionless
Sphere and Cylinder
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
DE acoustic vector fields; scattering; acoustic intensity
AB In this study, the properties of the scattered acoustic vector fields generated by a simple rigid motionless sphere and cylinder are investigated. Analytical solutions are derived from general acoustic pressure scattering models, and analyzed for wave numbers in the resonance region. The separable active and reactive components of the acoustic intensity are used to investigate the structural features of the scattered field components. The ability to extract scattered field features is illustrated with measurements obtained from in-air experiments using an anechoic chamber and acoustic intensity probes to measure the scattered acoustic vector field resulting from continuous plane wave illumination.
C1 [Barton, Robert J., III; Moss, Geoffrey R.] USN, Undersea Warfare Ctr, Div Newport, Newport, RI 02841 USA.
[Smith, Kevin B.] US Navy, Postgrad Sch, Dept Phys, Monterey, CA 93943 USA.
RP Barton, RJ (reprint author), USN, Undersea Warfare Ctr, Div Newport, Newport, RI 02841 USA.
EM robert.barton@navy.mil; geoffrey.moss@navy.mil
FU Office of Navel Research; Maritime Surveillance Division; Naval Undersea
Warfare Center
FX Support for this research efforts is sponsored in part by the Office of
Navel Research, Code 3211, Maritime Surveillance Division and Code 322
Speceal Research Award (SRA) in Ocean Acoustics Program, and the Naval
Undersea Warfare Center, Division Newport Internal Laboratory
Independent Research (ILIR) program.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 4
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005800011
ER
PT J
AU Baylog, JG
Wettergren, TA
AF Baylog, John G.
Wettergren, Thomas A.
GP IEEE
TI Performance Bounds for Coordinated AUV Search Planning
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
AB This paper establishes plausible limits on search performance for a set of AUVs participating in a coordinated undersea search operation. We build on previously developed cell based methods for evaluating search performance under conditions of geospatial non-homogeneity in detection likelihood and search object placement. To establish performance bounds, a theoretical template provided in the communications channel is adapted for development of an analogous AUV search channel. The concept of search capacity is introduced and developed in this paper. From a simple cell search capacity, search channel configurations are devised to suit specific search performance objectives and to demonstrate the generality of the performance bound when applied to search. This information theoretic performance measure is shown to support decomposition over search subspaces allowing for plausible inference in AUV search planning and post operation evaluation under geospatial non-homogeneity. Results are presented to demonstrate the validity of the performance bounds and their inherent capability to measure the collaboration potential among searchers.
C1 [Baylog, John G.; Wettergren, Thomas A.] USN, Undersea Warfare Ctr, Newport, RI 02841 USA.
RP Baylog, JG (reprint author), USN, Undersea Warfare Ctr, 1176 Howell St, Newport, RI 02841 USA.
EM john.baylog@navy.mil; t.a.wettergren@ieee.org
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 10
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005800086
ER
PT J
AU Cipolla, K
Keith, W
Foley, A
AF Cipolla, Kimberly
Keith, William
Foley, Alia
GP IEEE
TI EXPERIMENTAL INVESTIGATION OF AXISYMMETRIC TURBULENT BOUNDARY LAYERS
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
DE turbulent boundary layers; tow tank experiment; towed arrays
ID WALL-PRESSURE-FLUCTUATIONS; CYLINDER
AB Measurements of the turbulent boundary layer over an experimental towed array were made at the David Taylor Model Basin, Naval Surface Warfare Center Carderock Division using a stationary stereo- particle image velocimetry (SPIV) system. Data were collected at discrete transverse planes along the length of the array at tow speeds between 6.2 and 15.4 m/s. The corresponding momentum thickness Reynolds numbers Re-theta varied from 4.8 x 10(5) to 1.1 x 10(6). This range is representative of values occurring in Navy applications and is much greater than those typically achieved in laboratory or with computational investigations. Instantaneous three-dimensional velocity fields and profiles have been published by the authors. However, the streamwise growth of the boundary layer and the variation with speed were not determined. The goal of this analysis is to provide additional insight into the development of axisymmetric boundary layers over long lengths and at moderate to high Reynolds numbers.
A stationary stereo-particle image velocimetry (SPIV) system was used to obtain three-dimensional velocity measurements and evaluate the boundary layer flow development along full-scale fleet towed array modules. Measurements were collected at discrete transverse planes along the length at tow speeds between 6.2 and 15.4 m/s. Algorithms for image preprocessing and filtering were applied to enhance the instantaneous images and maximize the data extracted from the images. Mean velocity profiles and relevant boundary layer parameters are extracted. This information is necessary to refine the scaling of the wall pressure measurements obtained simultaneously [1] and flow noise models. Independent load cell measurements of the total drag on the towed model provided the momentum thickness at the end of the model and the spatially-averaged friction velocity u(tau).
In order to average multiple images and compute statistics of the boundary layer parameters, new algorithms for identifying the array and its shadow are being developed. This facilitates the computation of relevant boundary layer parameters and the evaluation of the axisymmetry of the boundary layer. Trends in the data with Reynolds number will be also determined. The growth of the turbulent boundary layer over the length of the array is an important metric with regard to estimating the maximum turbulent boundary layer thickness which exists on a fleet towed array. The underlying structure of the axisymmetric boundary layer, which leads to significant increases in wall shear stress with respect to flat plate cases, is of primary importance. These new insights will facilitate efforts toward towed array reliability and an accurate prediction of drag and flow noise for any towed array application.
C1 [Cipolla, Kimberly; Keith, William; Foley, Alia] USN, Undersea Warfare Ctr, Sensors & Sonar Syst Dept, Newport, RI 02841 USA.
RP Cipolla, K (reprint author), USN, Undersea Warfare Ctr, Sensors & Sonar Syst Dept, Newport, RI 02841 USA.
EM Kimberly.cipolla@navy.mil
NR 10
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 6
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005800113
ER
PT J
AU Cochenour, B
Mullen, L
AF Cochenour, Brandon
Mullen, Linda
GP IEEE
TI Channel response measurements for diffuse non-line-of-sight (NLOS)
optical communication links underwater
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
DE underwater optical communications; underwater laser communications;
turbid water; non-line-of-sight (NLOS)
ID MODULATED LIGHT; PROPAGATION; WATER
AB Presented are experimental measurements comparing the frequency (i.e. - impulse) response (up to 1GHz) for an underwater optical communications channel as a function of water clarity using collimated or diffuse laser light. The measurement technique used is adapted from a previously reported method used for measuring the channel response of collimated laser beam [1,2]. These measurements establish the bandwidth limitations for non-line-of-sight (NLOS) optical links underwater as a function of their operating environment. Comparisons to direct line-of-sight links using collimated beams are also presented.
C1 [Cochenour, Brandon; Mullen, Linda] USN, Air Syst Command NAVAIR, Patuxent River, MD USA.
RP Cochenour, B (reprint author), USN, Air Syst Command NAVAIR, Patuxent River, MD USA.
EM brandon.cochenour@navy.mil
NR 18
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 5
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005801165
ER
PT J
AU Donovan, GT
AF Donovan, Glenn T.
GP IEEE
TI Development and Testing of a Real-Time Terrain Navigation Method for
AUVs
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
DE Inertial Navigation; Monte Carlo methods; Particle Filters; Position
Measurement; Robot Motion; Sonar Applications (key words)
AB Underwater localization is still a significant challenge for an Autonomous Underwater Vehicle (AUV) during long endurance missions. Typically the vehicle must rely on external infrastructure such as Global Positioning System (GPS) satellites or underwater acoustic positioning system transponders to provide navigation corrections. These options will not always be feasible during some missions. This paper describes applied research into addressing this challenge through the development of a Monte Carlo Localization (MCL), or particle filter framework. The goal is to supplement an AUV navigation system with independent position fixes based on environmental observations. A particle filter framework for bathymetric terrain navigation is developed and tested using real in-water vehicle and sensor data collected with NUWCs 123/4" Mid-Size Autonomous Reconfigurable Vehicle (MARV) AUV. The results illustrate how this technique can be successfully applied to allow an AUV to recover from significant position uncertainty and errors during a mission. Additionally it is concluded that extending the particle filter to three dimensions to account for depth measurement bias is preferable to other techniques for handling tidal bias.
C1 USN, Undersea Warfare Ctr NUWC, Newport, RI 02841 USA.
RP Donovan, GT (reprint author), USN, Undersea Warfare Ctr NUWC, Newport, RI 02841 USA.
EM Glenn.donovan@navy.mil
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 9
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005800114
ER
PT J
AU Edwards, K
Veeramony, J
Nguyen, T
Sitton, D
AF Edwards, Kacey
Veeramony, Jay
Tiffany Nguyen
Sitton, David
GP IEEE
TI An Evaluation of Boundary Condition Specification for a Littoral
Hydrodynamic Model
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
DE Nearshore; circulation; littoral; hydrodynamic; model; Delft3D
AB Littoral hydrodynamic models are valuable tools for characterizing near shore waves and currents. There are a number of ways to prescribe boundary conditions for the model. A tide model is used to obtain astronomic boundary conditions, or among other sources, a regional model can provide time series boundary conditions. We investigate the differences imposed by these two types of boundary conditions for 4 model cases-two- and three-dimensional cases at two locations. Furthermore, we investigate how changing the temporal resolution of the time series boundary condition and how varying the horizontal resolution of the regional model affects the model results.
C1 [Edwards, Kacey; Veeramony, Jay] USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
[Tiffany Nguyen; Sitton, David] QinetiQ N Amer, Stennis Space Ctr, MS USA.
RP Edwards, K (reprint author), USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 4
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005800099
ER
PT J
AU Fribance, DB
Wijesekera, HW
Teague, WJ
AF Fribance, Diane Bennett
Wijesekera, Hemantha W.
Teague, William J.
GP IEEE
TI Measurements of hurricane induced high-frequency currents
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
DE Hurricane; High-frequency waves; Dissipation; Super-inertial
ID INTERNAL WAVE-FIELD; DEEP-OCEAN; THERMOCLINE; ENERGY; IVAN
AB Hurricanes are powerful, energetic storms that can be fueled by warm ocean waters, while simultaneously driving transport and mixing under their path. Wind-driven mixing is an important mechanism for generating internal waves, and hurricanes are capable of generating particularly high levels of mixing. The internal waves in turn allow diapycnal mixing in the ocean, accelerating heat transfer from the near surface to deeper waters. This plays a role in global thermohaline circulation, affecting heat transfer and therefore density properties throughout the oceans. However, while the importance of internal waves is well established, direct measurements of hurricane-generated internal waves over the shelf and slope regions are scarce. As a result, the mechanisms for the generation of these waves by storms are poorly understood. Here we examine the high frequency response and generation of internal waves by Hurricane Ivan as it travelled over the continental shelf edge and slope in the Gulf of Mexico. Velocity data were collected as part of the Naval Research Laboratory's Shelf Energetics and Exchange Dynamics (SEED) experiment. Moorings consisted of Trawl Resistant Bottom Mounts (TRBMs) in the form of a dome-shaped pod known as a Barny due to its barnacle-like shape. The Barnies housed ADCPs and wave/tide gauges, and during the hurricane were subject to extreme current conditions. In particular, over the shelf where water depths are 60 - 90m and surface waves reached significant wave heights of at least 20 m, bottom currents generated by these waves were over 2 m s(-1). Despite these extreme conditions, which set the nearby National Data Buoy Center (NDBC) buoy 42040 adrift, the Barnies proved themselves to be robust, and continued to measure water velocity and pressure both during and after the hurricane's presence in the region. This was the first test of the instrumentation setup under these extreme conditions, and their survival allowed a unique suite of measurements to be made which would not have otherwise been possible.
Two distinct responses were observed over the shallow shelf edge (similar to 90 m) and the deep slope (similar to 500 - 1000 m). During the forcing stage of the hurricane over the shelf edge, internal wave motions were found to be three-dimensional, and after the passage of the hurricane velocity fluctuations became primarily horizontal and lasted about 3 days. Over the slope, inertial (f) and super-inertial waves with frequencies of 2f, 3f, 4f and higher were excited by the hurricane. These super-inertial waves persisted for 2-4 days while near-inertial waves lasted more than a week. The super-inertial fluctuations were found near bottom over the slope (500 - 1000 m) where kinetic energy levels were at least 25 times larger than the kinetic energy level during calm weather, indicating that turbulent dissipation rates and eddy diffusivities increased by two orders of magnitude. The storm-generated super-inertial motions have the potential to enhance mixing in the deeper part of the thermocline. The storm-generated super-inertial motions lead to mixing both along and across isopycnals, acting as a potential vector for warmer waters to reach the deep ocean.
C1 [Fribance, Diane Bennett; Wijesekera, Hemantha W.; Teague, William J.] USN, Ocean Sci Branch, Res Labs, Stennis Space Ctr, MS 39529 USA.
RP Fribance, DB (reprint author), USN, Ocean Sci Branch, Res Labs, Stennis Space Ctr, MS 39529 USA.
EM diane.bennett.ctr@nrlssc.navy.mil
NR 20
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 7
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005801013
ER
PT J
AU Jensen, TG
Rogers, WE
Gravois, U
Campbell, T
Allard, R
AF Jensen, T. G.
Rogers, W. E.
Gravois, U.
Campbell, T.
Allard, R.
GP IEEE
TI Wave-current interaction in the Florida Current in a coupled
atmosphere-ocean-wave model
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
ID TIDES
AB The interaction of waves and currents are investigated in the Florida Current region in two events in early April 2005 using a state-of-the-art coupled atmosphere-ocean forecast model that includes assimilation of observations. During the first event, strong northerly winds force swell southward opposing the Florida Current. Current-wave interaction results in larger significant wave heights than found without currents. The second event has south-easterly winds with a significant component along the current direction. In that case, significant wave heights are smaller for the simulation that includes wave-current interaction than without that feed-back. Wave heights at buoy locations near the coast is generally in good agreement with the models results, which implies that inclusion of wave-current interaction may not be important near the shore. The simulation includes events where the maximum winds reach 20 m/s and significant wave heights exceed 2 m.
C1 [Jensen, T. G.; Rogers, W. E.; Campbell, T.; Allard, R.] USN, Res Lab, NRL, Code 7320, Stennis Space Ctr, MS 39529 USA.
[Gravois, U.] Univ Florida, Dept Civil & Coastal Engn, Gainesville, FL USA.
RP Jensen, TG (reprint author), USN, Res Lab, NRL, Code 7320, Stennis Space Ctr, MS 39529 USA.
EM Tommy.Jensen@nrlssc.navy.mil
FU Office of Naval Research
FX This work was sponsored by Office of Naval Research. We thank Travis A.
Smith, NRL Stennis Space Center and Jason Nachamkin, NRL Monterey for
their assistance with model setup and providing data for boundary and
initial conditions. Brian Haus, University of Miami, provided access to
the buoy observations.
NR 13
TC 0
Z9 0
U1 2
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 9
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005800120
ER
PT J
AU Keith, W
Foley, A
Cipolla, K
AF Keith, William
Foley, Alia
Cipolla, Kimberly
GP IEEE
TI Wavenumber-Frequency Analysis of Turbulent Wall Pressure Fluctuations
over a Wide Reynolds Number Range of Turbulent Pipe Flows
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
DE turbulence; wavenumber frequency analsysis; pipe flow
ID SPECTRA
AB Measurements of the autospectra and coherence of turbulent wall pressure fluctuations were made in the circular test section of the Quiet Water Tunnel Facility at the Naval Undersea Warfare Center in Newport, Rhode Island. The pipe diameter Reynolds numbers varied from 2.09 x 10(5) to 1.85 x 10(6). The coherence measurements are shown to collapse well with the similarity scaling over the entire range of Reynolds numbers. Wavenumber-frequency spectra are estimated by computing the spatial Fourier transform of the measured coherence, using the model of Corcos. The results are shown to accurately represent the convective ridge portion of the wavernumber-frequency spectra where the dominant energy exists.
C1 [Keith, William; Foley, Alia; Cipolla, Kimberly] USN, Undersea Warfare Ctr, Sensors & Sonar Syst Dept, Newport, RI USA.
RP Keith, W (reprint author), USN, Undersea Warfare Ctr, Sensors & Sonar Syst Dept, Newport, RI USA.
EM william.keith@navy.mil
NR 9
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 5
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005800072
ER
PT J
AU Laws, K
Vesecky, J
Paduan, J
AF Laws, Kenneth
Vesecky, John
Paduan, Jeffrey
GP IEEE
TI Predicting the Capabilities of Ship Monitoring by HF Radar in Coastal
Regions
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
DE HF radar; ship monitoring; marine domain awareness; capability
simulation
ID SURFACE-WAVE RADAR; SURVEILLANCE
AB Maritime domain awareness is important for coastal nations in terms of applications to coastal conservancy, security, fishery and stewardship of their exclusive economic zones (EEZs). Maritime situational awareness involves knowing the location, speed and bearing of ships and boats in the EEZ. HF radar is a useful tool in providing ship information in real time. It is especially effective when combined with information from ship-borne AIS beacons. It is important to be able to simulate HF radar (as well as AIS) performance in a ship-monitoring role, so that the cost-effectiveness of a network of HF radars and AIS beacon receivers can be estimated. A good performance simulation model also allows design trade studies that lead to effective and efficient system design. We describe a radar performance simulation model based on well-known principles and specialized to the Codar SeaSonde HF radar as installed at the Pescadero California station in the California Ocean Current Monitoring Program (COCMP). We include a parameter to account for the loss in propagation across the land-sea transition as well as coupling HF radar waves between antennas and the ground wave propagation mode. We compare performance simulation results in terms of signal to noise ratio with radar observations of ships by the Pescadero HF radar station. We find good qualitative agreement in terms of the ranges at which ships are detected and not detected.
C1 [Laws, Kenneth; Vesecky, John] Univ Calif Santa Cruz, Dept Elect Engn, Santa Cruz, CA 95064 USA.
[Paduan, Jeffrey] Naval Postgrad Sch, Oceanography Dept, Monterey, CA 93943 USA.
RP Laws, K (reprint author), Univ Calif Santa Cruz, Dept Elect Engn, Santa Cruz, CA 95064 USA.
EM kip@soe.ucsc.edu; vesecky@soe.ucsc.edu; paduan@nps.navy.mil
FU Coastal Ocean Currents Monitoring Program of California Coastal
Conservancy, State of California
FX Supported in part by the Coastal Ocean Currents Monitoring Program of
California Coastal Conservancy, State of California
NR 21
TC 0
Z9 0
U1 1
U2 5
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 5
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005801008
ER
PT J
AU Midtgaard, O
Hansen, RE
Saebo, TO
Myers, V
Dubberley, JR
Quidu, I
AF Midtgaard, Oivind
Hansen, Roy Edgar
Saebo, Torstein Olsmo
Myers, Vincent
Dubberley, John R.
Quidu, Isabelle
GP IEEE
TI Change Detection Using Synthetic Aperture Sonar: Preliminary Results
from the Larvik Trial
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
AB In April of 2011, FFI led a sea trial near Larvik, Norway on FFIs research vessel the H. U. Sverdrup II with participation by representatives from Canada, United States, and France. One objective of the sea trial was to acquire a data set suitable for examining incoherent and coherent change detection and automated target recognition (ATR) algorithms applied to Synthetic Aperture Sonar (SAS) imagery. The end goal is to produce an automated tool for detecting recently placed objects on the seafloor. To test these algorithms two areas were chosen, one with a comparatively benign seafloor and one with a boulder strewn complex seafloor. Each area was surveyed before and after deployment of objects. The survey time intervals varied from two days to eight days. In this paper we present the trial and show examples of SAS images and change detection of the images.
C1 [Midtgaard, Oivind; Hansen, Roy Edgar; Saebo, Torstein Olsmo] Norwegian Def Res Estab FFI, POB 25, NO-2027 Kjeller, Norway.
[Myers, Vincent] Def R&D Canada, Halifax, NS B2Y 3Z7, Canada.
[Dubberley, John R.] Naval Res Lab, Stennis Space Ctr, MS 39529 USA.
[Quidu, Isabelle] ENSTA Bretagne, E3I2 lab, F-29806 Brest, France.
RP Midtgaard, O (reprint author), Norwegian Def Res Estab FFI, POB 25, NO-2027 Kjeller, Norway.
EM Oivind.Midtgaard@ffi.no
NR 22
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 8
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005801173
ER
PT J
AU Mobasseri, BG
Sankepelly, S
Lynch, RS
AF Mobasseri, Bijan G.
Sankepelly, Shruthi
Lynch, Robert S.
GP IEEE
TI Sonar Detection Performance Improvement Using Embedded Watermark
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
ID CHANNELS
AB Embedding of a digital watermark in a sonar waveform has been recently proposed. The detection of the watermark is subsequently used for identification and authentication. Generally, a matched filter receiver is used for the detection of unmarked pulses. However, if the pulse carries a watermark we can exploit the knowledge of the watermark to improve the detection rate of the sonar pulse itself. This operation takes place in the proposed joint detector. If the received pulse is unmarked, we show that the detection rate is virtually identical to the matched filter receiver.
C1 [Mobasseri, Bijan G.; Sankepelly, Shruthi] Villanova Univ, Villanova, PA 19085 USA.
[Lynch, Robert S.] Naval Undersea Warfare Ctr, Signal Proc Branch, Newport, RI 02841 USA.
RP Mobasseri, BG (reprint author), Villanova Univ, Villanova, PA 19085 USA.
EM bijan.mobasseri@villanova.edu; shruthi.sankepelly@villanova.edu;
robert.s.lynch@navy.mil
FU Office of Naval Research; Naval Undersea Warfare Center
[N66604-09-M-0050]
FX This research is funded by the Office of Naval Research and the Naval
Undersea Warfare Center, contract N66604-09-M-0050. The authors
gratefully acknowledge this support.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 6
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005801095
ER
PT B
AU Nguyen, TC
Watson, KP
AF Nguyen, Thai C.
Watson, Kennard P.
GP IEEE
TI Development of a Collision Model for Mine Clearing Darts
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
DE collision modeling; aerodynamic interference; rigid body 6-DOF
AB This paper describes the development of a collision model for mine clearing darts and its implementation in a six-degree-of-freedom (6-DOF) code for predicting dart trajectories from dispense to ground impact. Previous 6-DOF simulations did not include dart collisions but only mimicked its effects by initializing the darts with random tipoff angles. These simulations provided good predictions of dart impact pattern size and density distribution when compared with flight test data. However, the impact velocity distribution was poorly predicted. To improve results for impact velocities, a collision model is implemented and presented here. The collision detection is based on the algorithm of [ 1] for collisions between finite circular cylinders. By treating the darts as cylinders, geometric features can be exploited for quicker detection, which is very important for keeping the simulation time to a reasonable level. Additional efficiency is achieved by dividing the darts into overlapping rectangular bins. The collision search is performed for dart pairs in individual bins instead of searching the entire dart cloud. With collision modeling implemented, the 6-DOF now provides excellent agreement with flight test data for impact pattern size, density and velocity distribution.
C1 [Nguyen, Thai C.; Watson, Kennard P.] USN, Ctr Surface Warfare, Panama City Div, Automat Dynam & Special Programs Branch, Panama City, FL 32407 USA.
RP Nguyen, TC (reprint author), USN, Ctr Surface Warfare, Panama City Div, Automat Dynam & Special Programs Branch, Panama City, FL 32407 USA.
NR 3
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 6
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005800085
ER
PT J
AU Posey, PG
Hebert, DA
Metzger, EJ
Wallcraft, AJ
Cummings, JA
Preller, RH
Smedstad, OM
Phelps, MW
AF Posey, P. G.
Hebert, D. A.
Metzger, E. J.
Wallcraft, A. J.
Cummings, J. A.
Preller, R. H.
Smedstad, O. M.
Phelps, M. W.
GP IEEE
TI Real-time Data Assimilation of Satellite Derived Ice Concentration into
the Arctic Cap Nowcast/Forecast System (ACNFS)
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
ID OCEAN MODEL HYCOM; VERTICAL COORDINATE
AB Over the last decade, ice conditions in the Arctic have changed dramatically resulting in the Arctic having a minimum in ice extent during the summers of 2007, 2008 and 2010. With this rapidly changing polar environment, the need for accurate ice forecasts is essential. The Naval Research Laboratory (NRL) has developed the Arctic Cap Nowcast/Forecast System (ACNFS), a two-way coupled ice/ocean system, to forecast ice conditions in the polar regions. This system applies the Los Alamos Community Ice CodE (CICE) coupled via the Earth System Modeling Framework (ESMF) to the HYbrid Coordinate Ocean Model (HYCOM). The Navy Coupled Ocean Data Assimilation (NCODA), a 3-Dimensional VARiational analysis (3DVAR) scheme, is used to assimilate ice and ocean observations into the forecast system. Ice concentration data from two sources: the Defense Meteorological Satellite Program (DMSP) Special Sensor Microwave/Imager (SSM/I) and the Advanced Microwave Scanning Radiometer for Earth Observation System (AMSR-E) are used as observations for the ice analysis. Results from the coupled system using both concentration input datasets will be discussed.
C1 [Posey, P. G.; Hebert, D. A.; Metzger, E. J.; Wallcraft, A. J.; Cummings, J. A.; Preller, R. H.] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Smedstad, O. M.] QinetiQ North Amer, Technol Solut Grp, Stennis Space Ctr, MS 39529 USA.
[Phelps, M. W.] Jacobs Engn, Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
RP Posey, PG (reprint author), USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
FU National Oceanographic Partnership Program; Office of Naval Research
FX This work was funded as part of the National Oceanographic Partnership
Program and the Office of Naval Research. The numerical simulations were
performed on the NAVY DSRC IBM P6 using grants of computer time from the
Department of Defense High Performance Computing Modernization Program.
This paper is NRL contribution NRL/PP/7320--11-0762 and is approved for
public release; distribution is unlimited.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 4
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005800125
ER
PT B
AU Prater, JL
Marston, TM
AF Prater, James L.
Marston, Timothy M.
GP IEEE
TI Partial Synthetic Aperture Beamformer
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
DE synthetic aperture sonar; autonomatic target recognition; beamforming
AB Synthetic Aperture Sonar (SAS) was developed as a means to produce long apertures that can create images at high resolution, usually achieved by collecting data on a platform with a predictable trajectory However, Autonomous Underwater Vehicle (AUV) technology has matured and now includes operational conditions where system trajectory is not predictable (e. g. autonomous redirection behavior). Partial aperture SAS (PSAS) can be used to provide image data for autonomous behaviors with relatively low data latency and can be used to minimize the effects of non-linear trajectories on SAS image production by providing imagery with minimal latency, but at lower resolution compared to full aperture imagery. This paper explores a technique that uses a range invariant aperture to form SAS images to provide the highest achievable resolution given a specified maximum aperture length (or data latency). A simulation is used to measure the effect of the range-invariant aperture on resolution and results are compared with theoretical values. PSAS techniques are also used to produce imagery from an existing SAS system, and imagery produced at various aperture lengths is compared. Results show that the effects of PSAS on image quality and resolution are predictable. Therefore, future efforts to develop image queued autonomous behaviors can trade data latency and image resolution to optimize system performance.
C1 [Prater, James L.; Marston, Timothy M.] USN, Ctr Surface Warfare, Panama City Div, Panama City, FL USA.
RP Prater, JL (reprint author), USN, Ctr Surface Warfare, Panama City Div, Panama City, FL USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 5
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005801145
ER
PT J
AU Shivarudrappa, S
Briggs, K
Hartmann, V
AF Shivarudrappa, Shivakumar
Briggs, Kevin
Hartmann, Valerie
GP IEEE
TI Effects of Hypoxia on the Trophic Structure of the Polychaete
Communities in the Northern Gulf of Mexico
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
DE hypoxia; polychaetes; benthos; diversity; feeding guild
ID CONTINENTAL-SHELF; BAY
AB Annelid polychaetes are the most abundant marine benthic invertebrates; they play significant functional roles in any aquatic system. Among many roles, their feeding mode promotes transfer of energy to the next trophic level. Polychaetes exhibit five different feeding guilds: herbivores, carnivores, filter-feeders, surface deposit feeders, and subsurface deposit feeders. The predominance of a feeding mode depends on abiotic factors such as rates of sedimentation, sediment type, organic carbon content, organic matter availability on and within sediments, redox potential, and biochemical oxygen consumption.
This study investigates the polychaete community structure and feeding guild pattern in four different provinces with varying hypoxia frequency and history in the northern Gulf of Mexico. Macrobenthos and sediment samples were collected during September 2009 from the northern Gulf of Mexico between the Atchafalaya and Mississippi Rivers to study the effect of hypoxia on feeding guild pattern, abundance and species diversity. Macrobenthos samples were dominated by polychaetes at all four provinces; more than 28 families of polychaetes are represented. The abundance and diversity data were compared with the sediment properties of grain size, organic matter concentration, and sedimentation rate, to help explain the variability in the biological data among provinces using principal component analysis (PCA). The polychaete data were statistically analyzed for species richness and diversity using the Shannon-Wiener index. Bray-Curtis cluster analysis was performed to determine the similarity of the polychaetes communities.
C1 [Shivarudrappa, Shivakumar; Hartmann, Valerie] Univ So Mississippi, Dept Marine Sci, Stennis Space Ctr, MS 39529 USA.
[Briggs, Kevin] Naval Res Lab, Sea Floor Sci Branch, Stennis Space Ctr, MS 39529 USA.
RP Shivarudrappa, S (reprint author), Univ So Mississippi, Dept Marine Sci, Stennis Space Ctr, MS 39529 USA.
EM schivaks@gmail.com
FU Office of Naval Research; Naval Research Laboratory
FX This work was supported by the Office of Naval Research and by the Naval
Research Laboratory, program element 61153N
NR 17
TC 0
Z9 0
U1 0
U2 7
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 6
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005801054
ER
PT J
AU Sternlicht, DD
Fernandez, JE
Holtzapple, R
Kucik, DP
Montgomery, TC
Loeffler, CM
AF Sternlicht, Daniel D.
Fernandez, Jose E.
Holtzapple, Richard
Kucik, Daniel P.
Montgomery, Thomas C.
Loeffler, Charles M.
GP IEEE
TI Advanced Sonar Technologies for Autonomous Mine Countermeasures
SO OCEANS 2011
LA English
DT Proceedings Paper
CT MTS/IEEE OCEANS Conference
CY SEP 19-22, 2011
CL Kona, HI
SP Marine Technol Soc (MTS), IEEE, OES
AB The U.S. Office of Naval Research is developing synthetic aperture sonars for the detection, localization, and classification of mines, for protection of sea lines of communication and Naval operating areas, and for support of amphibious operations. This paper reviews several evolving mine countermeasures sonars deployed on autonomous undersea vehicles that operate stand-alone and in coordination with complementary sensors, including the Small Synthetic Aperture Minehunter (SSAM), the Autonomous Topographic & Large Area Survey (ATLAS) sonar, and the Buried Object Scanning Sonar (BOSS).
C1 [Sternlicht, Daniel D.; Fernandez, Jose E.; Holtzapple, Richard; Kucik, Daniel P.] USN, Ctr Surface Warfare, Panama City Div, 110 Vernon Ave, Panama City, FL 32407 USA.
[Montgomery, Thomas C.] Penn State Univ, Appl Res Lab, State Coll, PA 16804 USA.
[Loeffler, Charles M.] Univ Texas Austin, Appl Res Labs, Austin, TX 78713 USA.
RP Sternlicht, DD (reprint author), USN, Ctr Surface Warfare, Panama City Div, 110 Vernon Ave, Panama City, FL 32407 USA.
NR 6
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-933957-39-8
PY 2011
PG 5
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA BYJ22
UT WOS:000299005801055
ER
PT S
AU Sanchez, PJ
White, KP
AF Sanchez, Paul J.
White, K. Preston, Jr.
BE Jain, S
Creasey, R
Himmelspach, J
TI INTERVAL ESTIMATION USING REPLICATION/DELETION AND MSER TRUNCATION
SO PROCEEDINGS OF THE 2011 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)/Conference on Modeling and Analysis
for Semiconductor Manufacturing (MASM)
CY DEC 11-14, 2011
CL Phoenix, AZ
SP Amer Stat Assoc (ASA), Assoc Comp Machinery-Special Interest Grp Simulat (ACM/SIGSIM), Inst Elect & Electron Engineers-Syst, Man, & Cybernet Soc (IEEE/SMC), Inst Ind Engineers (IIE), Inst Operat Res & Management Sci-Simulat Soc (INFORMS-SIM), Natl Inst Stand & Technol (NIST), Soc Modeling & Simulat Int (SCS)
ID SIMULATION; TRANSIENT
AB This paper addresses the construction of a consistent interval estimator for the steady-state mean within a replication/deletion framework for output analysis when MSER truncation is applied. Because the MSER truncation point is a random variable, the truncated output sequences for each replication typically are unequal in length. A weighting scheme is applied to the replication means to correct for unequal sample sizes, as is standard in ANOVA. A numerical example is provided to illustrate the procedure and consequences.
C1 [Sanchez, Paul J.] USN, Postgrad Sch, Dept Operat Res, 1411 Cunningham Rd, Monterey, CA 93943 USA.
[White, K. Preston, Jr.] Univ Virginia, Dept Syst Engn, Charlottesville, VA 22976 USA.
RP Sanchez, PJ (reprint author), USN, Postgrad Sch, Dept Operat Res, 1411 Cunningham Rd, Monterey, CA 93943 USA.
EM pjsanche@nps.edu; kpwhite@virginia.edu
FU Naval Postgraduate School
FX This work was completed while the second author was on leave as Visiting
Professor in the Operations Research Department at the Naval
Postgraduate School.
NR 24
TC 2
Z9 2
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4577-2109-0
J9 WINT SIMUL C PROC
PY 2011
BP 488
EP 494
PG 7
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BYU80
UT WOS:000300520800044
ER
PT S
AU Schruben, L
Singham, D
AF Schruben, Lee
Singham, Dashi
BE Jain, S
Creasey, R
Himmelspach, J
TI AGENT BASED SIMULATION OUTPUT ANALYSIS
SO PROCEEDINGS OF THE 2011 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)/Conference on Modeling and Analysis
for Semiconductor Manufacturing (MASM)
CY DEC 11-14, 2011
CL Phoenix, AZ
SP Amer Stat Assoc (ASA), Assoc Comp Machinery-Special Interest Grp Simulat (ACM/SIGSIM), Inst Elect & Electron Engineers-Syst, Man, & Cybernet Soc (IEEE/SMC), Inst Ind Engineers (IIE), Inst Operat Res & Management Sci-Simulat Soc (INFORMS-SIM), Natl Inst Stand & Technol (NIST), Soc Modeling & Simulat Int (SCS)
AB In most realistic simulations there are multiple outputs of interest and the overall performance of the system can only be estimated in terms of these multiple outputs. We propose a method that uses agent-based modeling to determine a truncation point to remove significant initialization bias. Mapping the output of multiple replications into agent paths that traverse the sample space helps determine when a near steady state has been reached. By viewing these paths in reversed time, qualitative and quantitative methods can be used to determine when the multivariate output is leaving its near-steady state regime as the paths coalesce back towards their common initialization state. The methodology is more efficient and general than typical approaches for finding a truncation point for scalar outputs of individual replicates. Artificial bootstrap-like re-sampling of simulation runs is proposed for expensive simulations to estimate system performance sensitivity.
C1 [Schruben, Lee] Univ Calif Berkeley, 4141 Etcheverry Hall, Berkeley, CA 94720 USA.
[Singham, Dashi] Naval Postgrad Sch, Monterey, CA 93943 USA.
RP Schruben, L (reprint author), Univ Calif Berkeley, 4141 Etcheverry Hall, Berkeley, CA 94720 USA.
EM lees@berkeley.edu; dsingham@nps.edu
NR 10
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4577-2109-0
J9 WINT SIMUL C PROC
PY 2011
BP 540
EP 548
PG 9
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BYU80
UT WOS:000300520800049
ER
PT S
AU Hyden, P
Ioup, E
Russell, S
AF Hyden, Paul
Ioup, Elias
Russell, Stephen
BE Jain, S
Creasey, R
Himmelspach, J
TI COMMUNICATING UNCERTAINTY INFORMATION ACROSS CONCEPTUAL BOUNDARIES
SO PROCEEDINGS OF THE 2011 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)/Conference on Modeling and Analysis
for Semiconductor Manufacturing (MASM)
CY DEC 11-14, 2011
CL Phoenix, AZ
SP Amer Stat Assoc (ASA), Assoc Comp Machinery-Special Interest Grp Simulat (ACM/SIGSIM), Inst Elect & Electron Engineers-Syst, Man, & Cybernet Soc (IEEE/SMC), Inst Ind Engineers (IIE), Inst Operat Res & Management Sci-Simulat Soc (INFORMS-SIM), Natl Inst Stand & Technol (NIST), Soc Modeling & Simulat Int (SCS)
ID WEATHER FORECASTS; PROBABILITY
AB Information about data collection and modeling risks are frequently locked with information providers rather than shared with downstream information consumers. Information consumers often ingest products automatically. Without protocols to inject uncertainty, the ensemble modeling products common in the modeling discipline cannot accurately account for the input uncertainty inherent to those products. Future work to establish use cases and incorporate practitioner-driven rules and protocols for transmitting tiered uncertainty information between information product producers and consumers will advance the needs of environmental, social, and economic actors in the ensemble modeling production chain. This in turn will allow for improved error transmission throughout the decision making enterprise.
C1 [Hyden, Paul; Russell, Stephen] Naval Res Lab, Code 5585,4555 Overlook Ave SW, Washington, DC 20375 USA.
[Ioup, Elias] Naval Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Hyden, P (reprint author), Naval Res Lab, Code 5585,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM paul.hyden@nrl.navy.mil; elias.ioup@nrlssc.navy.mil;
ste-phen.russell@nrl.navy.mil
FU Naval Research Laboratory
FX This work was funded in part by the Naval Research Laboratory base
funding program.
NR 49
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4577-2109-0
J9 WINT SIMUL C PROC
PY 2011
BP 1096
EP 1102
PG 7
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BYU80
UT WOS:000300520801034
ER
PT S
AU Sanchez, SM
Wan, H
AF Sanchez, Susan M.
Wan, Hong
BE Jain, S
Creasey, R
Himmelspach, J
TI BETTER THAN A PETAFLOP: THE POWER OF EFFICIENT EXPERIMENTAL DESIGN
SO PROCEEDINGS OF THE 2011 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)/Conference on Modeling and Analysis
for Semiconductor Manufacturing (MASM)
CY DEC 11-14, 2011
CL Phoenix, AZ
SP Amer Stat Assoc (ASA), Assoc Comp Machinery-Special Interest Grp Simulat (ACM/SIGSIM), Inst Elect & Electron Engineers-Syst, Man, & Cybernet Soc (IEEE/SMC), Inst Ind Engineers (IIE), Inst Operat Res & Management Sci-Simulat Soc (INFORMS-SIM), Natl Inst Stand & Technol (NIST), Soc Modeling & Simulat Int (SCS)
ID SIMULATION EXPERIMENTS; OPTIMIZATION
AB Recent advances in high-performance computing have pushed computational capabilities to a petaflop (a thousand trillion operations per second) in a single computing cluster. This breakthrough has been hailed as a way to fundamentally change science and engineering by letting people perform experiments that were previously beyond reach. But for those interested in exploring the I/O behavior of their simulation model, efficient experimental design has a much higher payoff at a much lower cost. A well-designed experiment allows the analyst to examine many more factors than would otherwise be possible, while providing insights that cannot be gleaned from trial-and-error approaches or by sampling factors one at a time. We present the basic concepts of experimental design, the types of goals it can address, and why it is such an important and useful tool for simulation. Ideally, this tutorial will entice you to use experimental designs in your upcoming simulation studies.
C1 [Sanchez, Susan M.] USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
[Wan, Hong] Purdue Univ, Sch Ind Engn, W Lafayette, IN 47907 USA.
RP Sanchez, SM (reprint author), USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
EM ssanchez@nps.edu; hwan@purdue.edu
FU U.S. Army Training and Doctrine Command Analysis Center Monterey
(TRAC-MTRY); Department of Defense's Modeling & Simulation Coordination
Office (MSCO); Netcentric Systems Test Science & Technology focus area
(NST ST)
FX This tutorial is an updated version of Sanchez and Wan (2009). This work
was supported in part by the U.S. Army Training and Doctrine Command
Analysis Center Monterey (TRAC-MTRY), the Department of Defenses
Modeling & Simulation Coordination Office (M&SCO), and the Netcentric
Systems Test Science & Technology focus area (NST S&T). Portions of this
tutorial appeared earlier in Sanchez (2008a, 2008b). Thanks to David
Kelton and Paul Sanchez for helpful comments.
NR 35
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4577-2109-0
J9 WINT SIMUL C PROC
PY 2011
BP 1436
EP 1450
PG 15
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BYU80
UT WOS:000300520801066
ER
PT S
AU Al Rowaei, AA
Buss, AH
Lieberman, S
AF Al Rowaei, Ahmed A.
Buss, Arnold H.
Lieberman, Stephen
BE Jain, S
Creasey, R
Himmelspach, J
TI THE EFFECTS OF TIME ADVANCE MECHANISM ON SIMPLE AGENT BEHAVIORS IN
COMBAT SIMULATIONS
SO PROCEEDINGS OF THE 2011 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)/Conference on Modeling and Analysis
for Semiconductor Manufacturing (MASM)
CY DEC 11-14, 2011
CL Phoenix, AZ
SP Amer Stat Assoc (ASA), Assoc Comp Machinery-Special Interest Grp Simulat (ACM/SIGSIM), Inst Elect & Electron Engineers-Syst, Man, & Cybernet Soc (IEEE/SMC), Inst Ind Engineers (IIE), Inst Operat Res & Management Sci-Simulat Soc (INFORMS-SIM), Natl Inst Stand & Technol (NIST), Soc Modeling & Simulat Int (SCS)
ID EVENT
AB We investigate the effects of time advance mechanisms on the behavior of agents in combat simulations using some simple scenarios relevant to combat and agent-based models. We implement these simulation designs in two modeling packages that illustrate the differences between discrete-time simulation (DTS) and discrete-event simulation (DES) methodologies. Many combat models use DTS as their simulation time advance mechanism. We demonstrate that the presence and size of the time step as a modeling component can have a substantial impact on the basic characteristics of agent and simulation performance. We show that the use of a DTS method can degrade the modeling accuracy of changes in agent sensor range and detection outcomes, and also can compromise the ability of agents to travel to specific target destinations in a spatial simulation environment. We conclude that DES methodology successfully addresses these problems and is preferred as a time advance mechanism in these situations.
C1 [Al Rowaei, Ahmed A.; Buss, Arnold H.; Lieberman, Stephen] USN, Postgrad Sch, MOVES Inst, Monterey, CA 93943 USA.
RP Al Rowaei, AA (reprint author), USN, Postgrad Sch, MOVES Inst, 700 Dyer Rd, Monterey, CA 93943 USA.
EM aalrowae@nps.edu; abuss@nps.edu; stephen-lieberman@gmail.com
NR 14
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4577-2109-0
J9 WINT SIMUL C PROC
PY 2011
BP 2426
EP 2437
PG 12
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BYU80
UT WOS:000300520802067
ER
PT S
AU Singham, D
Therkildsen, M
Schruben, L
AF Singham, Dashi
Therkildsen, Meredith
Schruben, Lee
BE Jain, S
Creasey, R
Himmelspach, J
TI APPLICATIONS OF FLOCKING ALGORITHMS TO INPUT MODELING FOR AGENT MOVEMENT
SO PROCEEDINGS OF THE 2011 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)/Conference on Modeling and Analysis
for Semiconductor Manufacturing (MASM)
CY DEC 11-14, 2011
CL Phoenix, AZ
SP Amer Stat Assoc (ASA), Assoc Comp Machinery-Special Interest Grp Simulat (ACM/SIGSIM), Inst Elect & Electron Engineers-Syst, Man, & Cybernet Soc (IEEE/SMC), Inst Ind Engineers (IIE), Inst Operat Res & Management Sci-Simulat Soc (INFORMS-SIM), Natl Inst Stand & Technol (NIST), Soc Modeling & Simulat Int (SCS)
AB Simulation flocking has been introduced as a method for generating simulation input from multivariate dependent time series for sensitivity and risk analysis. It can be applied to data for which a parametric model is not readily available or imposes too many restrictions on the possible inputs. This method uses techniques from agent-based modeling to generate a flock of boids that follow the data. In this paper, we apply simulation flocking to a border crossing scenario to determine if waypoints simulated from flocking can be used to provide improved information on the number of hostiles successfully crossing the border. Analysis of the output reveals scenario limitations and potential areas of improvement in the patrol strategy.
C1 [Singham, Dashi; Therkildsen, Meredith] USN, Postgrad Sch, 1411 Cunningham Rd, Monterey, CA 93943 USA.
[Schruben, Lee] Univ Calif Berkeley, Berkeley, CA 94720 USA.
RP Singham, D (reprint author), USN, Postgrad Sch, 1411 Cunningham Rd, Monterey, CA 93943 USA.
EM dsingham@nps.edu; matherki@nps.edu; lees@berkeley.edu
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4577-2109-0
J9 WINT SIMUL C PROC
PY 2011
BP 2438
EP 2444
PG 7
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BYU80
UT WOS:000300520802068
ER
PT S
AU Blais, C
AF Blais, Curtis
BE Jain, S
Creasey, R
Himmelspach, J
TI APPLICATION OF COALITION BATTLE MANAGEMENT LANGUAGE (C-BML) AND C-BML
SERVICES TO LIVE, VIRTUAL, AND CONSTRUCTIVE (LVC) SIMULATION
ENVIRONMENTS
SO PROCEEDINGS OF THE 2011 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)/Conference on Modeling and Analysis
for Semiconductor Manufacturing (MASM)
CY DEC 11-14, 2011
CL Phoenix, AZ
SP Amer Stat Assoc (ASA), Assoc Comp Machinery-Special Interest Grp Simulat (ACM/SIGSIM), Inst Elect & Electron Engineers-Syst, Man, & Cybernet Soc (IEEE/SMC), Inst Ind Engineers (IIE), Inst Operat Res & Management Sci-Simulat Soc (INFORMS-SIM), Natl Inst Stand & Technol (NIST), Soc Modeling & Simulat Int (SCS)
AB Information sharing is a key requirement in Live, Virtual, and Constructive (LVC) simulation environments. Operational plans, orders, and requests from live, virtual, or constructive command and control systems or simulations need to be received by and operated on by receiving LVC systems. Situational reports from the LVC systems need to be received and interpreted or displayed by receiving LVC systems. Many simulation systems have not been developed with capabilities for robust interactions with other simulations beyond federation capabilities obtained through such protocols as the High Level Architecture (HLA) or the Distributed Interactive Simulation (DIS). The Coalition Battle Management Language (C-BML) is an emerging standard from the Simulation Interoperability Standards Organization (SISO) developed to address the need for such information sharing across real-world command and control systems and simulations in LVC environments. This paper provides an overview of the C-BML standard and describes its application to information interchange across LVC systems.
C1 USN, Postgrad Sch, Modeling Virtual Environm & Simulat MOVES Inst, Monterey, CA 93943 USA.
RP Blais, C (reprint author), USN, Postgrad Sch, Modeling Virtual Environm & Simulat MOVES Inst, Monterey, CA 93943 USA.
EM clblais@nps.edu
NR 20
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4577-2109-0
J9 WINT SIMUL C PROC
PY 2011
BP 2582
EP 2594
PG 13
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BYU80
UT WOS:000300520802081
ER
PT S
AU Hyland, JC
Smith, CM
AF Hyland, John C.
Smith, Cheryl M.
BE Jain, S
Creasey, R
Himmelspach, J
TI SYSTEM PERFORMANCE AND LAYERED ANALYSIS TOOL
SO PROCEEDINGS OF THE 2011 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)/Conference on Modeling and Analysis
for Semiconductor Manufacturing (MASM)
CY DEC 11-14, 2011
CL Phoenix, AZ
SP Amer Stat Assoc (ASA), Assoc Comp Machinery-Special Interest Grp Simulat (ACM/SIGSIM), Inst Elect & Electron Engineers-Syst, Man, & Cybernet Soc (IEEE/SMC), Inst Ind Engineers (IIE), Inst Operat Res & Management Sci-Simulat Soc (INFORMS-SIM), Natl Inst Stand & Technol (NIST), Soc Modeling & Simulat Int (SCS)
AB Naval Surface Warfare Center Panama City Division (NSWC-PCD) has developed a System Performance and Layered Analysis Tool (SPLAT) using MATLAB. The overall goal is to detect terrorist threats, particularly in an open crowded area, in a timely manner. Given a sensor configuration and a scenario specification, it combines a layered set of threat detection sensors to determine overall system performance in terms of probability of detection, probability of false alarm, and cost. SPLAT avoids overly optimistic performance estimates inherent when a series of closely spaced detection events are modeled as discrete, independent Bernoulli trials. SPLAT describes all sensors using multi-dimensional lookup tables, thereby circumventing the need to mathematically model complex sensor performance functions. This methodology is sufficiently general that it can be applied to a broad class of problems where multiple stationary sensors attempt to detect a moving target.
C1 [Hyland, John C.; Smith, Cheryl M.] USN, Ctr Surface Warfare, Panama City Div, Panama City, FL 32407 USA.
RP Hyland, JC (reprint author), USN, Ctr Surface Warfare, Panama City Div, 110 Vernon Ave, Panama City, FL 32407 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4577-2109-0
J9 WINT SIMUL C PROC
PY 2011
BP 2595
EP 2606
PG 12
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BYU80
UT WOS:000300520802082
ER
PT S
AU Floore, TE
Gilman, GH
AF Floore, Timothy E.
Gilman, George H.
BE Jain, S
Creasey, R
Himmelspach, J
TI DESIGN AND CAPABILITIES OF AN ENHANCED NAVAL MINE WARFARE SIMULATION
FRAMEWORK
SO PROCEEDINGS OF THE 2011 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)/Conference on Modeling and Analysis
for Semiconductor Manufacturing (MASM)
CY DEC 11-14, 2011
CL Phoenix, AZ
SP Amer Stat Assoc (ASA), Assoc Comp Machinery-Special Interest Grp Simulat (ACM/SIGSIM), Inst Elect & Electron Engineers-Syst, Man, & Cybernet Soc (IEEE/SMC), Inst Ind Engineers (IIE), Inst Operat Res & Management Sci-Simulat Soc (INFORMS-SIM), Natl Inst Stand & Technol (NIST), Soc Modeling & Simulat Int (SCS)
AB The Naval Surface Warfare Center, Panama City Division (NSWC PCD) designed and implemented a new tool, The Rapid Mine Simulation System Enterprise Architecture (RMSSEA), to support existing naval mine warfare simulations and to provide enhanced future mine warfare capabilities. RMSSEA supports existing physics-based models of Navy assets and threats in order to provide ship susceptibility and sweep effectiveness measures. The tool expands support for modeling of future systems, including ma-neuverable surface and underwater unmanned systems. Additionally, RMSSEA allows for simulations of distributed sensor and mobile warhead devices. The tool incorporates improved automation and visualization, which reduces simulation setup time and supports increased focus on results analysis.
C1 [Floore, Timothy E.; Gilman, George H.] USN, Ctr Surface Warfare, Panama City Div, Panama City, FL 32407 USA.
RP Floore, TE (reprint author), USN, Ctr Surface Warfare, Panama City Div, 110 Vernon Ave, Panama City, FL 32407 USA.
EM timothy.floore@navy.mil; george.gilman@navy.mil
NR 0
TC 0
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4577-2109-0
J9 WINT SIMUL C PROC
PY 2011
BP 2607
EP 2613
PG 7
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BYU80
UT WOS:000300520802083
ER
PT S
AU Heath, SK
Brailsford, SC
Buss, A
Macal, CM
AF Heath, Susan K.
Brailsford, Sally C.
Buss, Arnold
Macal, Charles M.
BE Jain, S
Creasey, R
Himmelspach, J
TI CROSS-PARADIGM SIMULATION MODELING: CHALLENGES AND SUCCESSES
SO PROCEEDINGS OF THE 2011 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)/Conference on Modeling and Analysis
for Semiconductor Manufacturing (MASM)
CY DEC 11-14, 2011
CL Phoenix, AZ
SP Amer Stat Assoc (ASA), Assoc Comp Machinery-Special Interest Grp Simulat (ACM/SIGSIM), Inst Elect & Electron Engineers-Syst, Man, & Cybernet Soc (IEEE/SMC), Inst Ind Engineers (IIE), Inst Operat Res & Management Sci-Simulat Soc (INFORMS-SIM), Natl Inst Stand & Technol (NIST), Soc Modeling & Simulat Int (SCS)
ID DYNAMICS; SYSTEM
AB This paper addresses the broad topic area of cross-paradigm simulation modeling with a focus on the discrete-event, system dynamics and agent-based paradigms. It incorporates contributions from four panel members with diverse perspectives and areas of expertise. First, each paradigm is described and definitions are presented. The difference between the process-oriented worldview and the event-oriented worldview within discrete-event simulation modeling, and the importance of this difference for cross-paradigm modeling, are discussed. Following the definitions, discussion of cross-paradigm modeling is given for each pair of these paradigms, highlighting current challenges and early successes in these areas. The basic time-advance mechanisms used in simulation modeling are also discussed, and the implications of these mechanisms for each paradigm is explored.
C1 [Heath, Susan K.] USN, Grad Sch Business & Publ Policy, Postgrad Sch, 555 Dyer Rd, Monterey, CA 93943 USA.
[Brailsford, Sally C.] Univ Southampton, Sch Management, Southampton SO171BJ, Hants, England.
[Buss, Arnold] MOVES Inst, Naval PostGrad Sch, Monterey, CA 93943 USA.
[Macal, Charles M.] Argonne Natl Lab, CAS2, Argonne, IL 60439 USA.
RP Heath, SK (reprint author), USN, Grad Sch Business & Publ Policy, Postgrad Sch, 555 Dyer Rd, Monterey, CA 93943 USA.
EM skheath@nps.edu; s.c.brailsford@soton.ac.uk; abuss@nps.edu;
macal@anl.gov
NR 40
TC 3
Z9 3
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4577-2109-0
J9 WINT SIMUL C PROC
PY 2011
BP 2783
EP 2797
PG 15
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BYU80
UT WOS:000300520803008
ER
PT S
AU Vieira, H
Sanchez, SM
Kienitz, KH
Belderrain, MCN
AF Vieira, Helcio, Jr.
Sanchez, Susan M.
Kienitz, Karl Heinz
Neyra Belderrain, Mischel Carmen
BE Jain, S
Creasey, R
Himmelspach, J
TI IMPROVED EFFICIENT, NEARLY ORTHOGONAL, NEARLY BALANCED MIXED DESIGNS
SO PROCEEDINGS OF THE 2011 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)/Conference on Modeling and Analysis
for Semiconductor Manufacturing (MASM)
CY DEC 11-14, 2011
CL Phoenix, AZ
SP Amer Stat Assoc (ASA), Assoc Comp Machinery-Special Interest Grp Simulat (ACM/SIGSIM), Inst Elect & Electron Engineers-Syst, Man, & Cybernet Soc (IEEE/SMC), Inst Ind Engineers (IIE), Inst Operat Res & Management Sci-Simulat Soc (INFORMS-SIM), Natl Inst Stand & Technol (NIST), Soc Modeling & Simulat Int (SCS)
AB Designed experiments are powerful ways to gain insights into the behavior of complex simulation models. In recent years, many new designs have been created to address the large number of factors and complex response surfaces that often arise in simulation studies, but handling discrete-valued or qualitative factors remains problematic. We proposed a framework for generating, with a (given) limited number of design points n, a design which is nearly orthogonal and also nearly balanced for any mix of factor types (categorical, numerical discrete, and numerical continuous) and/or mix of factor levels.
Our approach can be used to create designs with low maximum absolute pairwise correlation, low imbalance level, and high D-optimality for simulation problems with mixed factor types. Our mixed designs are much more efficient than existing alternatives.
C1 [Vieira, Helcio, Jr.; Kienitz, Karl Heinz; Neyra Belderrain, Mischel Carmen] Technol Inst Aeronaut, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, Brazil.
[Sanchez, Susan M.] Univ Circle 1, Naval Postgrad Sch, Monterey, CA 93943 USA.
RP Vieira, H (reprint author), Technol Inst Aeronaut, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, Brazil.
EM junior_hv@yahoo.com.br; ssanchez@nps.edu; kienitz@ita.br; carmen@ita.br
RI Kienitz, Karl/J-8773-2013
NR 20
TC 4
Z9 4
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4577-2109-0
J9 WINT SIMUL C PROC
PY 2011
BP 3600
EP 3611
PG 12
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Operations Research & Management Science
SC Computer Science; Engineering; Operations Research & Management Science
GA BYU80
UT WOS:000300520803079
ER
PT S
AU Cheek, GT
AF Cheek, G. T.
BE Fuchigami, T
Cheek, GT
Fry, A
TI Voltammetric Study of Fluorenone Complexation by Lewis Acids in an Ionic
Liquid
SO RECENT PROGRESS IN SYNTHETIC AND MECHANISTIC ORGANIC ELECTROCHEMISTRY
SE ECS Transactions
LA English
DT Proceedings Paper
CT 219th Meeting of the Electrochemical-Society (ECS)/Symposium on Recent
Progress in Synthetic and Mechanistic Organic Electrochemistry/Symposium
on Organic and Biological Electrochemistry General Poster
Session/Nanotechnology General Session
CY MAY 01-06, 2011
CL Montreal, CANADA
SP Electrochem Soc (ECS), Organ & Biolog Electrochem, New Technol Subcomm
AB The complexation of fluorenone by various Lewis acid triflates has been investigated in the ionic liquid 1-butyl-1-methylpyrrolidinium trifluoromethansulfonate (BMPY TfO). Addition of Yb(TfO)(3), La(TfO)(3), and Sc(TfO)(3) produce an approximately 400 mV positive potential shift in the initial fluorenone reduction process. This process occurs as two merged peaks, probably due to fluorenone complexes having varying numbers of triflate ligands. By contrast, Hf(TfO)(4) produces a single reduction peak shifted by +1.0 V from uncomplexed fluorenone.
C1 USN Acad, Dept Chem, Annapolis, MD 21402 USA.
RP Cheek, GT (reprint author), USN Acad, Dept Chem, Annapolis, MD 21402 USA.
NR 9
TC 3
Z9 3
U1 0
U2 2
PU ELECTROCHEMICAL SOCIETY INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-56677-918-0
J9 ECS TRANSACTIONS
PY 2011
VL 35
IS 16
BP 17
EP 21
DI 10.1149/1.3646928
PG 5
WC Electrochemistry
SC Electrochemistry
GA BYV56
UT WOS:000300609100003
ER
PT J
AU Kim, M
Kim, CS
Merritt, CD
Canedy, CL
Bewley, WW
Abell, J
Vurgaftman, I
Meyer, JR
AF Kim, M.
Kim, C. S.
Merritt, C. D.
Canedy, C. L.
Bewley, W. W.
Abell, J.
Vurgaftman, I.
Meyer, J. R.
GP IEEE
TI High-Performance Interband Cascade Lasers for lambda=3-5.5 mu m
SO 2011 IEEE PHOTONICS CONFERENCE (PHO)
LA English
DT Proceedings Paper
CT IEEE Photonics Conference (PHO)
CY OCT 09-13, 2011
CL Arlington, VA
SP IEEE
C1 [Kim, M.; Kim, C. S.; Merritt, C. D.; Canedy, C. L.; Bewley, W. W.; Abell, J.; Vurgaftman, I.; Meyer, J. R.] USN, Res Lab, Washington, DC 20375 USA.
RP Kim, M (reprint author), USN, Res Lab, Code 5613, Washington, DC 20375 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-8939-8
PY 2011
BP 676
EP 677
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BYQ41
UT WOS:000299750700338
ER
PT S
AU Chen, X
Rowe, NC
AF Chen, Xiao
Rowe, Neil C.
GP IEEE
TI An Energy-Efficient Communication Scheme in Wireless Cable Sensor
Networks
SO 2011 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC)
SE IEEE International Conference on Communications
LA English
DT Proceedings Paper
CT IEEE International Conference on Communications (ICC)
CY JUN 05-09, 2011
CL Kyoto, JAPAN
SP IEEE, IEEE Commun Soc, IEICE Commun Soc, Sci Council Japan
AB Nowadays wireless sensor networks (WSNs) have attracted a great deal of study due to their low cost and wide-range applications. Most of the sensors used so far are point sensors which have a disc-shaped sensing region. In this paper, we study a new type of sensor: the fiber optic cable sensor. Unlike a traditional point sensor, this type of sensor has a rectangular sensing region with a processor installed on it to do processing and communication. Like wireless sensor networks with point sensors, energy-efficient communication is still an important issue in wireless sensor networks with cable sensors because of the need to efficiently use limited resources. To address the issue, we propose a Cable Mode Transition (CMT) algorithm, which determines the minimal number of active sensors to maintain K-coverage of a terrain as well as K-connectivity of the network. Specifically, it allocates periods of inactivity for cable sensors without affecting the coverage and connectivity requirements of the network based only on local information. Before presenting CMT, we first show the relationship between coverage and connectivity, then the eligibility algorithm permitting a cable sensor to decide whether to stay active. CMT calls the eligibility algorithm to schedule cables. Simulation results show that our scheme is efficient in saving energy and thus can prolong the lifetime of wireless cable sensor networks.
C1 [Chen, Xiao] Southwest Texas State Univ, Dept Comp Sci, San Marcos, TX 78666 USA.
[Rowe, Neil C.] US Naval Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
RP Chen, X (reprint author), Southwest Texas State Univ, Dept Comp Sci, San Marcos, TX 78666 USA.
EM xc10@txstate.edu; ncrowe@nps.edu
FU NSF [CBET 0729696]
FX This research was supported by NSF grant CBET 0729696. This work
represents the opinions of the authors only and does not necessarily
represent the views of the U.S. Government.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-3607
BN 978-1-61284-233-2
J9 IEEE ICC
PY 2011
PG 5
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BXG34
UT WOS:000296057103154
ER
PT S
AU Boeneman, K
Prasuhn, DE
Blanco-Canosa, JB
Dawson, PE
Melinger, JS
Ancona, M
Stewart, MH
Susumu, K
Huston, A
Medintz, IL
AF Boeneman, Kelly
Prasuhn, Duane E.
Blanco-Canosa, Juan B.
Dawson, Philip E.
Melinger, Joseph S.
Ancona, Mario
Stewart, Michael H.
Susumu, Kimihiro
Huston, Alan
Medintz, Igor L.
BE Parak, WJ
Yamamoto, K
Osinski, M
TI Quantum dots as a FRET donor and nanoscaffold for multivalent DNA
photonic wires
SO COLLOIDAL QUANTUM DOTS/NANOCRYSTALS FOR BIOMEDICAL APPLICATIONS VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Colloidal Quantum Dots/Nanocrystals for Biomedical
Applications VI
CY JAN 22-24, 2011
CL San Francisco, CA
SP SPIE
DE Quantum dots; organic dyes; FRET; DNA
ID RESONANCE ENERGY-TRANSFER; NANOCRYSTALS; STABILITY; LIGANDS; PRIMERS;
CDSE
AB We demonstrate Forster resonance energy transfer (FRET) through DNA photonic wires self-assembled around a central CdSe/ZnS semiconductor quantum dot (QD). The central QD acts as a nanoscaffold and FRET donor to a series of acceptor dyes along a DNA strand. By utilizing a DNA intercalating dye, altering the location of the dyes and using a series of increasingly red-shifted dyes along the DNA, we are able to track the efficiency of energy transfer through the DNA photonic structure via steady-state spectroscopy. Data suggests that limiting factors for efficient energy transfer are the sub-obtimal photophysical properties of acceptor dyes, including low quantum yields. These issues may be addressed with improved configurations of QDs, DNA and dyes. The development of biophotonic wire assemblies utilizing the superior photophysical properties of QDs will have widespread application in nanotechnology.
C1 [Boeneman, Kelly; Prasuhn, Duane E.; Medintz, Igor L.] USN, Ctr Bio Mol Sci & Engn, Res Lab, Washington, DC 20375 USA.
RP Boeneman, K (reprint author), USN, Ctr Bio Mol Sci & Engn, Res Lab, Code 6900, Washington, DC 20375 USA.
RI Gemmill, Kelly/G-2167-2012; Parak, Wolfgang J./M-3998-2014
OI Parak, Wolfgang J./0000-0003-1672-6650
NR 21
TC 0
Z9 0
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-446-8
J9 PROC SPIE
PY 2011
VL 7909
AR 79090R
DI 10.1117/12.879272
PG 8
WC Engineering, Biomedical; Nanoscience & Nanotechnology; Optics
SC Engineering; Science & Technology - Other Topics; Optics
GA BXZ87
UT WOS:000297729500013
ER
PT S
AU Kanaev, AV
Hou, W
Woods, S
AF Kanaev, A. V.
Hou, W.
Woods, S.
BE Huckridge, DA
Ebert, RR
TI Multi-frame Underwater Image Restoration
SO ELECTRO-OPTICAL AND INFRARED SYSTEMS: TECHNOLOGY AND APPLICATIONS VIII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Electro-Optical and Infrared Systems - Technology and
Applications VIII
CY SEP 21-22, 2011
CL Prague, CZECH REPUBLIC
SP SPIE
DE underwater imaging; multi-frame restoration; imaging through turbulence
AB Ability to image underwater is highly desired for scientific and military applications, including optical communications, submarine awareness, diver visibility, and mine detection. Underwater imaging is severely impaired by scattering and optical turbulence associated with refraction index fluctuations. This work introduces novel approach to restoration of degraded underwater imagery based on multi-frame correction technique developed for atmospheric distortions. The method represents synthesis of "lucky-region" fusion and optical flow based image warping. Developed multi-frame image restoration algorithm is applied to sets of images collected in laboratory under controlled conditions as well as field test data. Reliance of image restoration on sophistication of the optical flow algorithm is shown. Variable degrees of image degradation mitigation which manifest themselves as high spatial frequency content recovery are demonstrated depending on imaging conditions and ratio of typical image spatial frequency scale to typical degradation spatial frequency scale.
C1 [Kanaev, A. V.] USN, Res Lab, Washington, DC 20375 USA.
RP Kanaev, AV (reprint author), USN, Res Lab, 4555 Overlook Ave, Washington, DC 20375 USA.
NR 18
TC 0
Z9 0
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-813-8
J9 PROC SPIE
PY 2011
VL 8185
AR 81850O
DI 10.1117/12.898914
PG 8
WC Remote Sensing; Optics; Physics, Applied
SC Remote Sensing; Optics; Physics
GA BXY49
UT WOS:000297622500022
ER
PT J
AU Giuseppe, JS
Hager, C
Tait, GB
AF Giuseppe, John S.
Hager, Carl
Tait, Gregory B.
TI Wireless RF Energy Propagation in Multiply-Connected Reverberant Spaces
SO IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
LA English
DT Article
DE Coupled cavities; reverberant energy propagation
AB Electromagnetic compatibility of electronic systems in reverberant environments is an important issue in the deployment of wireless communications and sensor networks in below-deck compartments of ships and in aircraft cabins and bays. The cumulative buildup and full exchange of radiated electromagnetic energy between multiply-connected reverberant spaces are examined using a simple model adapted from the field of acoustics. Based on conservation of average energy in the diffuse fields, the general model formulation is valid for both weak and strong couplings between the cavities caused by window materials, open apertures, closed and open hatches, seams, and cable/pipe penetrations through bulkheads. Physical energy loss and coupling parameters in three connected chambers are determined from an overlay of model solutions to time-resolved received power measurements, and they can subsequently be used to assess wireless emission coverage and shielding of structures in the connected spaces.
C1 [Giuseppe, John S.; Hager, Carl; Tait, Gregory B.] USN, Ctr Surface Warfare, Dahlgren Div, Dahlgren, VA 22448 USA.
RP Giuseppe, JS (reprint author), USN, Ctr Surface Warfare, Dahlgren Div, Dahlgren, VA 22448 USA.
NR 10
TC 2
Z9 2
U1 1
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1536-1225
J9 IEEE ANTENN WIREL PR
JI IEEE Antennas Wirel. Propag. Lett.
PY 2011
VL 10
BP 1251
EP 1254
DI 10.1109/LAWP.2011.2175195
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 852PT
UT WOS:000297370600002
ER
PT S
AU Cooper, KP
Wachter, RF
AF Cooper, Khershed P.
Wachter, Ralph F.
BE Postek, MT
Coleman, VA
TI Challenges and Opportunities in Nanomanufacturing
SO INSTRUMENTATION, METROLOGY, AND STANDARDS FOR NANOMANUFACTURING, OPTICS,
AND SEMICONDUCTORS V
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Instrumentation, Metrology, and Standards for
Nanomanufacturing, Optics, and Semiconductors V
CY AUG 24-25, 2011
CL San Diego, CA
SP SPIE, Natl Inst Stand & Technol (NIST)
DE nanomaterials; nanopatterning; nanostructures; direct digital
nanomanufacturing; system-level integration; high-speed
nanomanufacturing
ID METHANOL FUEL-CELLS; BLEND MEMBRANES
AB Nanomanufacturing is the fabrication of materials and components with nanoscale features and resolution and their integration into useful engineered systems. Through the precise control of materials and processes at the nanoscale, new features, functional capabilities, and properties, controlled by physics at the nanoscale, may be realized. The challenges for nanomanufacturing are achieving the desired functionality, product quality, process repeatability, production scalability and cost affordability. The ONR Manufacturing Science Program is meeting these challenges though basic research in nano-scale direct digital manufacturing, massively parallel nanoscale processing, and high-throughput (e. g., roll-to-roll) nanofabrication that encourages system-level integration. These concepts along with research examples will be described.
C1 [Cooper, Khershed P.] USN, Res Lab, Washington, DC 20375 USA.
RP Cooper, KP (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM khershed.cooper@nrl.navy.mil
NR 15
TC 1
Z9 1
U1 1
U2 6
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-715-5
J9 PROC SPIE
PY 2011
VL 8105
AR 810503
DI 10.1117/12.894415
PG 6
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Optics
SC Engineering; Science & Technology - Other Topics; Optics
GA BXY02
UT WOS:000297587400001
ER
PT S
AU Crane, NJ
O'Brien, FP
Forsberg, JA
Potter, BK
Elster, EA
AF Crane, Nicole J.
O'Brien, Frederick P.
Forsberg, Jonathan A.
Potter, Benjamin K.
Elster, Eric A.
BE Alfano, RR
Demos, SG
TI Developing a toolbox for analysis of warrior wound biopsies: vibrational
spectroscopy
SO OPTICAL BIOPSY IX
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Optical Biopsy IX
CY JAN 24-26, 2011
CL San Francisco, CA
SP SPIE
DE combat wounds; biopsies; wound effluent; Raman spectroscopy; FT-IR
imaging
ID TRANSFORM INFRARED-SPECTROSCOPY; TARGET ENTROPY MINIMIZATION;
SURFACE-ENHANCED RAMAN; IN-VIVO; HETEROTOPIC OSSIFICATION; RAPID
IDENTIFICATION; SECONDARY STRUCTURE; RELEVANT MICROORGANISMS;
RISK-FACTORS; BONE TISSUE
AB The management of modern traumatic war wounds remains a significant challenge for clinicians. This is a reflection of the extensive osseous and soft-tissue damage caused by blasts and high-energy projectiles. The ensuing inflammatory response ultimately dictates the pace of wound healing and tissue regeneration. Consequently, the eventual timing of wound closure or definitive coverage is often subjectively based. Some wounds require an extended period of time to close or fail to remain closed, despite the use and application of novel wound-specific treatment modalities. Aside from impaired wound healing, additional wound complications include wound infection, biofilm formation, and heterotopic ossification (the pathological mineralization of soft tissues). An understanding of the molecular environment of acute wounds throughout the debridement process can provide valuable insight into the mechanisms associated with the eventual wound outcome. The analysis of Raman spectra of ex vivo wound biopsy tissue obtained from serial traumatic wound debridements reveals a decreased 1665 cm(-1)/1445 cm(-1) band area ratio in impaired healing wounds, indicative of an impaired remodeling process, in addition to a decreased 1240 cm(-1)/1270cm(-1). The examination of debrided tissue exhibits mineralization during the early development of heterotopic ossification. Finally, preliminary results suggest that Fourier transform infrared (FT-IR) images of wound effluent may be able to provide early microbiological information about the wound.
C1 [Crane, Nicole J.; Elster, Eric A.] USN, Med Res Ctr, Operat & Undersea Med Directorate, Dept Regenerat Med, Silver Spring, MD USA.
RP Crane, NJ (reprint author), USN, Med Res Ctr, Operat & Undersea Med Directorate, Dept Regenerat Med, Silver Spring, MD USA.
OI Potter, MD, Benjamin K./0000-0002-8771-0317
NR 70
TC 1
Z9 1
U1 0
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-8432-1
J9 PROC SPIE
PY 2011
VL 7895
AR 78950O
DI 10.1117/12.877478
PG 14
WC Engineering, Biomedical; Optics
SC Engineering; Optics
GA BXY50
UT WOS:000297622800017
ER
PT S
AU Lane, PA
Richardson, TH
AF Lane, Paul A.
Richardson, Tim H.
BE Shinar, R
Kymissis, I
TI Fluorescent Detection of NO2 by Free Base Tetraphenyl Porphyrins
SO ORGANIC SEMICONDUCTORS IN SENSORS AND BIOELECTRONICS IV
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Organic Semiconductors in Sensors and Bioelectronics IV
CY AUG 24-25, 2011
CL San Diego, CA
SP SPIE
DE Optical sensor; NO2; fluorescence; absorption; porphyrin
ID NITROGEN-DIOXIDE; SENSOR; DERIVATIVES; POLYMER; FILMS
AB The absorption and fluorescence of free base, tetraphenyl-substituted porphyrins are shown to be sensitive to exposure to NO2. The Soret band absorption red-shifts and fluorescence is quenched by an order of magnitude. The fluorescence spectrum of a gassed sample is also red-shifted and broadened following exposure. Several solid state embodiments of a fluorescent sensor based upon free base porphyrins are proposed.
C1 [Lane, Paul A.] USN, Res Lab, Washington, DC 20375 USA.
RP Lane, PA (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 24
TC 0
Z9 0
U1 3
U2 10
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-728-5
J9 PROC SPIE
PY 2011
VL 8118
AR 81180J
DI 10.1117/12.896192
PG 6
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BXY54
UT WOS:000297625300007
ER
PT S
AU Zeller, J
Manzur, T
AF Zeller, John
Manzur, Tariq
BE Carapezza, EM
TI Effects of evaporation layer on free-space optical communication links
near sea surface at 1.55 mu m
SO UNMANNED/UNATTENDED SENSORS AND SENSOR NETWORKS VIII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Unmanned/Unattended Sensors and Sensor Networks VIII
CY SEP 20-21, 2011
CL Prague, CZECH REPUBLIC
SP SPIE
DE Free-space optics; evaporation layer; communication networks; infrared
lasers; MODTRAN; Fried parameter
ID PARAMETER
AB Free-space optics (FSO) holds the potential for high bandwidth communication in situations where landline communication is not practical, with relatively low cost and maintenance. For FSO communication in maritime environments, laser beams propagating through the evaporation layer near the sea surface are affected by turbulence, the scattering coefficients of the water particles, and the salt water itself. To better gauge and understand the effects of turbulence on FSO communication, the refractive index structure parameter C-n(2), which relates to scintillation strength, is determined from database of environmental parameters experimentally measured near the sea surface. A high speed Shack-Hartmann wavefront sensor is utilized to measure wavefront distortion of a beam transmitted though the evaporation layer, and thus determine the extent of turbulence encountered along the optical pathway. Through the use of adaptive optics, the wavefront of a transmitted beam is modulated in real time to compensate for turbulence, thereby providing optimal FSO reception. The Kalman filter method is also employed to reconstruct an original undistorted image from a series of sequential transmitted images altered by turbulence. In addition, atmospheric, free-space, and scintillation losses are analyzed and predicted for extended optical path lengths in view of their impact on FSO data transfer and communication. Furthermore, the effects of weather conditions on FSO transmission are investigated through MODTRAN based modeling at 1.55 mu m wavelength, where multiple elevation angles are considered. Using advanced techniques, many limitations associated with infrared FSO transmission and reception in the evaporation layer may be overcome or circumvented.
C1 [Zeller, John; Manzur, Tariq] USN, Undersea Warfare Ctr, Newport, RI 02841 USA.
RP Zeller, J (reprint author), USN, Undersea Warfare Ctr, 1176 Howell St, Newport, RI 02841 USA.
NR 13
TC 0
Z9 0
U1 1
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-812-1
J9 PROC SPIE
PY 2011
VL 8184
DI 10.1117/12.902685
PG 12
WC Optics; Telecommunications
SC Optics; Telecommunications
GA BXY51
UT WOS:000297623200006
ER
PT S
AU Ge, HY
Kirsteins, IP
AF Ge, Hongya
Kirsteins, Ivars P.
GP IEEE
TI MULTI-RANK PROCESSING FOR PASSIVE RANGING IN UNDERWATER ACOUSTIC
ENVIRONMENTS SUBJECT TO SPATIAL COHERENCE LOSS
SO 2011 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL
PROCESSING
SE International Conference on Acoustics Speech and Signal Processing
ICASSP
LA English
DT Proceedings Paper
CT IEEE International Conference on Acoustics, Speech, and Signal
Processing (ICASSP)
CY MAY 22-27, 2011
CL Prague Congress Ctr, Prague, CZECH REPUBLIC
SP Inst Elect & Elect Engineers Signal Processing Soc, IEEE
HO Prague Congress Ctr
DE Passive Source Localization; Parameter Estimation Performance
ID ARRIVAL ESTIMATION; WAVE-FRONTS; DIRECTION
AB In this work we derive the maximum likelihood estimator for passive wavefront curvature ranging systems operating in environments subject to a spatial coherence loss. As a consequence of the spatial coherence loss, the optimum processor is no longer a rank-1 matched filter and now instead involves a multi-rank weighted combination of the data based on the coherence matrix eigenvectors and eigenvalues. We also establish an interesting connection of our proposed multi-rank processor to the conventional rank-1 processor, and to the non-coherence sub-array processor, under different operating conditions. A comparative study is carried out in evaluating the performance of the proposed processors.
C1 [Ge, Hongya] New Jersey Inst Technol, Dept ECE, Newark, NJ 07102 USA.
[Kirsteins, Ivars P.] Naval Undersea Warfare Ctr, Newport, RI 02841 USA.
RP Ge, HY (reprint author), New Jersey Inst Technol, Dept ECE, Newark, NJ 07102 USA.
FU THE ONR AND NUWC
FX THIS WORK HAS BEEN PARTIALLY SUPPORTED BY THE ONR AND NUWC.
NR 6
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1520-6149
BN 978-1-4577-0539-7
J9 INT CONF ACOUST SPEE
PY 2011
BP 2692
EP 2695
PG 4
WC Acoustics; Engineering, Electrical & Electronic; Imaging Science &
Photographic Technology
SC Acoustics; Engineering; Imaging Science & Photographic Technology
GA BXG36
UT WOS:000296062403027
ER
PT S
AU Wagner, KT
Doroslovacki, MI
AF Wagner, Kevin T.
Doroslovacki, Milos I.
GP IEEE
TI PROPORTIONATE-TYPE NORMALIZED LEAST MEAN SQUARE ALGORITHM WITH GAIN
ALLOCATION MOTIVATED BY MINIMIZATION OF MEAN-SQUARE-WEIGHT DEVIATION FOR
COLORED INPUT
SO 2011 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL
PROCESSING
SE International Conference on Acoustics Speech and Signal Processing
ICASSP
LA English
DT Proceedings Paper
CT IEEE International Conference on Acoustics, Speech, and Signal
Processing (ICASSP)
CY MAY 22-27, 2011
CL Prague Congress Ctr, Prague, CZECH REPUBLIC
SP Inst Elect & Elect Engineers Signal Processing Soc, IEEE
HO Prague Congress Ctr
DE Adaptive filtering; convergence; proportionate-type normalized least
mean square (PtNLMS) algorithm
AB In previous work, a water-filling algorithm was proposed which sought to minimize the mean square error (MSE) at any given time by optimally choosing the gains (i.e. step-sizes) each time instance. This work relied on the assumption that the input signal was white. In this paper, an algorithm is derived which operates when the input signal is colored. The proposed algorithm minimizes the mean square weight deviation which is important in many applications such as system identification. Additionally, it is shown that by minimizing the mean square weight deviation, an upper bound on the MSE is also minimized. The proposed algorithm offers improved misalignment and learning curve convergence rates relative to other standard algorithms.
C1 [Wagner, Kevin T.] Naval Res Lab, Div Radar, Washington, DC 20375 USA.
[Doroslovacki, Milos I.] George Washington Univ, Dept Elect & Comp Engn, Washington, DC 20052 USA.
RP Wagner, KT (reprint author), Naval Res Lab, Div Radar, Washington, DC 20375 USA.
NR 6
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1520-6149
BN 978-1-4577-0539-7
J9 INT CONF ACOUST SPEE
PY 2011
BP 4124
EP 4127
PG 4
WC Acoustics; Engineering, Electrical & Electronic; Imaging Science &
Photographic Technology
SC Acoustics; Engineering; Imaging Science & Photographic Technology
GA BXG36
UT WOS:000296062404158
ER
PT J
AU Deng, Y
AF Deng, Yong
BE Volgy, TJ
Corbetta, R
Grant, KA
Baird, RG
TI The Power and Politics of Recognition: Status in China's Foreign
Relations
SO MAJOR POWERS AND THE QUEST FOR STATUS IN INTERNATIONAL POLITICS: GLOBAL
AND REGIONAL PERSPECTIVES
SE Evolutionary Processes in World Politics
LA English
DT Article; Book Chapter
C1 USN Acad, Annapolis, MD 21402 USA.
RP Deng, Y (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 0
TC 1
Z9 1
U1 1
U2 1
PU PALGRAVE
PI BASINGSTOKE
PA HOUNDMILLS, BASINGSTOKE RG21 6XS, ENGLAND
BN 978-0-23011-931-4
J9 EVOL PROC WORLD POL
PY 2011
BP 77
EP 95
D2 10.1057/9780230119314
PG 19
WC International Relations; Political Science
SC International Relations; Government & Law
GA BWT11
UT WOS:000294769700005
ER
PT J
AU Lillibridge, J
Scharroo, R
Jacobs, G
Russell, L
Tabor, V
AF Lillibridge, John
Scharroo, Remko
Jacobs, Gregg
Russell, Lamar
Tabor, Vincent
TI Quality Assessment of the Jason-2 Operational and Interim Geophysical
Data Records
SO MARINE GEODESY
LA English
DT Article
DE Near real-time sea level; Jason-2; satellite altimetry; calibration
ID OCEAN; ALTIMETRY; MISSION
AB The Ocean Surface Topography Mission onboard the Jason-2 satellite represents a transition fromthe Topex/Poseidon and Jason-1 research altimetry missions, operated by NASA and CNES, to an operational mission that now includes NOAA and EUMETSAT. The near real-time (NRT) data production and distribution is shared by NOAA and EUMETSAT. This paper describes how the Jason-2 data are shared within the United States between NOAA and Navy entities. Differences between the NRT products and offline products are assessed to determine if the NRT products are accurate enough to meet the operational needs of wind/wave and sea surface height applications.
C1 [Lillibridge, John] NOAA, Lab Satellite Altimetry, Silver Spring, MD 20910 USA.
[Scharroo, Remko] Altimetrics LLC, Cornish, NH USA.
[Jacobs, Gregg] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Russell, Lamar] USN, Oceanog Off, Ocean Measurements Dept, Stennis Space Ctr, MS 39529 USA.
[Tabor, Vincent] NOAA, Comp Operat Branch, Suitland, MD USA.
RP Lillibridge, J (reprint author), NOAA, Lab Satellite Altimetry, 1335 EW Hwy,E-RA31, Silver Spring, MD 20910 USA.
EM John.Lillibridge@noaa.gov
RI Scharroo, Remko/F-5623-2010; Lillibridge, John/F-5606-2010
OI Lillibridge, John/0000-0001-9102-171X
FU NASA
FX This investigation was supported in part by the NASA Ocean Surface
Topography program. The views, opinions, and findings contained in this
report are those of the authors and should not be construed as an
official NOAA or U.S. Government position, policy, or decision.
NR 11
TC 4
Z9 4
U1 0
U2 3
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0149-0419
J9 MAR GEOD
JI Mar. Geod.
PY 2011
VL 34
IS 3-4
SI SI
BP 191
EP 213
DI 10.1080/01490419.2011.584827
PG 23
WC Geochemistry & Geophysics; Oceanography; Remote Sensing
SC Geochemistry & Geophysics; Oceanography; Remote Sensing
GA 855CQ
UT WOS:000297541600002
ER
PT S
AU Zhang, P
Lau, YY
Tang, W
Gomez, MR
French, DM
Zier, JC
Gilgenbach, RM
AF Zhang, Peng
Lau, Y. Y.
Tang, W.
Gomez, M. R.
French, D. M.
Zier, J. C.
Gilgenbach, R. M.
GP IEEE
TI Contact Resistance with Dissimilar Materials: Bulk Contacts and Thin
Film Contacts
SO 2011 IEEE 57TH HOLM CONFERENCE ON ELECTRICAL CONTACTS
SE Electrical Contacts-IEEE Holm Conference on Electrical Contacts
LA English
DT Proceedings Paper
CT 57th IEEE Holm Conference on Electrical Contacts
CY SEP 11-14, 2011
CL Minneapolis, MN
SP Inst Elect & Elect Engineers (IEEE), IEEE Components, Packaging & Mfg Technol Soc (CPMT)
DE contact resistance; electrical contacts; contact potential; thin films;
dissimilar materials; constriction resistance; spreading resistance
AB Contact resistance is important to integrated circuits and thin film devices, carbon nanotube based cathodes and interconnects, field emitters, wire-array z-pinches, metal-insulator-vacuum junctions, and high power microwave sources, etc. In other applications, the electrical contacts are formed by thin film structures of a few microns thickness, such as in micro-electromechanical system (MEMS) relays and microconnector systems. This paper summarizes the recent modeling efforts at the University of Michigan, addressing the effect of dissimilar materials and of finite dimensions on the contact resistance of both bulk contacts and thin film contacts. The Cartesian and cylindrical geometries are analyzed. Accurate analytical scaling laws are constructed for the contact resistance of both bulk contacts and thin film contacts over a large range of aspect ratios and resistivity ratios. These were validated against known limiting cases and spot-checks with numerical simulations.
C1 [Zhang, Peng; Lau, Y. Y.; Gilgenbach, R. M.] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA.
[Zhang, Peng; Tang, W.; French, D. M.] Air Force Res Lab, Kirtland AFB, NM USA.
[Gomez, M. R.] Sandia Natl Labs, Livermore, CA 94550 USA.
[Zier, J. C.] Naval Res Lab, Washington, DC 20375 USA.
RP Zhang, P (reprint author), Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA.; Zhang, P (reprint author), Air Force Res Lab, Kirtland AFB, NM USA.
EM yylau@umich.edu
RI Zhang, Peng/C-8257-2011
OI Zhang, Peng/0000-0003-0606-6855
FU AFOSR grant on the Basic Physics of Distributed Plasma Discharges; L-3
Communications Electron Device Division; Northrop-Grumman Corporation;
University of Michigan Institute for Plasma Science and Engineering
FX This work was supported by an AFOSR grant on the Basic Physics of
Distributed Plasma Discharges, L-3 Communications Electron Device
Division, and Northrop-Grumman Corporation. Two of us (PZ and DMF)
gratefully acknowledge a fellowship from the University of Michigan
Institute for Plasma Science and Engineering.
NR 18
TC 0
Z9 0
U1 2
U2 6
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1062-6808
BN 978-1-61284-648-4
J9 ELECTR CONTACT
PY 2011
DI 10.1109/HOLM.2011.6034777
PG 6
WC Engineering, Electrical & Electronic
SC Engineering
GA BXU61
UT WOS:000297131500005
ER
PT S
AU Shannon, R
Modi, M
Stanco, J
AF Shannon, Russell
Modi, Mukund
Stanco, Joe
GP IEEE
TI Achieving Optimum Test by Applying Standardization
SO IEEE AUTOTESTCON 2011: SYSTEMS READINESS TECHNOLOGY CONFERENCE
SE IEEE Autotestcon
LA English
DT Proceedings Paper
CT IEEE AUTOTESTCON - Systems Readiness Technology Conference
CY SEP 12-15, 2011
CL Baltimore, MD
SP Inst Elect & Elect Engineers (IEEE), IEEE Aerosp & Elect Syst Soc (AESS), IEEE Instrumentat & Measurement Soc (IMS)
DE component; ATS Framework; diagnostics; prognostics; testability
AB Over the past two decades, the US Department of Defense (DoD) has seen the introduction of weapon systems that do not meet their diagnostic requirements when initially fielded. Some suffer false alarm rates over eighty percent [ 1]. During a product's lifecycle, the ability to determine how well it performs is based on the capability to test and the evaluation of those tests. Different tests and evaluations are required throughout the product's lifecycle. These tests must, therefore, have the standards that define parameters, techniques and procedures for measurements that present an accurate and precise communication of information. In order to effectively accomplish this task, the development of quality tests capable of supporting these tasks must be defined and documented for the design, production, and operations-and-support phases of a system's lifecycle. As a product proceeds through its life cycle, the information collected at each phase must be used for the support of subsequent phases.
Demonstrations of avionics system and subsystem diagnostic capability are performed before a system or subsystem is verified. This ordinarily happens during the System Design and Demonstration phase of a program. In the case of aircraft or ground vehicles, there are several subsystem demonstrations, followed by a single system-level event. A major issue plaguing the development of aircraft avionics systems is the lack of standardized methods to demonstrate full testability in a scientific and efficient manner before an aircraft is fielded. This is usually due to budgetary, schedule and knowledge constraints. Shannon and Knecht [1] surveyed diagnostic managers in government and Industry regarding the current state of test on major aircraft acquisition programs. The authors reported that there was "agreement that current guidance was insufficient to prevent erroneous, incomplete or insufficient testing at the system or subsystem level" before an aircraft was fielded.
Each phase of the acquisition process can be decomposed into a set of processes that can be grouped together. These groups can be further decomposed until there is sufficient information to completely describe the process. Using this technique, a hierarchical set of data items and their associated processes can be defined. From this group, the processes involved in testing can now be identified and used in activities that have multiple applications. In this paper, the authors present the process flows associated with the development and testing of a system. The authors identify where those processes typically break down "in the real world", due to constraints such as budget, schedule, lack of training/guidance for those involved, and other factors. The authors then recommend use of existing standards, at appropriate "break points", and suggest where new industry-wide standards need to be developed if one does not currently exist.
C1 [Shannon, Russell; Modi, Mukund] USN, Air Syst Command, Lakehurst, NJ USA.
[Stanco, Joe] Support Sys Associat, Lakehurst, NJ USA.
RP Shannon, R (reprint author), USN, Air Syst Command, Lakehurst, NJ USA.
EM russell.shannon@navy.mil; mukund.modi@navy.mil; jstanco@ssai.org
NR 16
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1088-7725
BN 978-1-4244-9361-6
J9 IEEE AUTOTESTCON
PY 2011
BP 130
EP 134
PG 5
WC Engineering, Electrical & Electronic
SC Engineering
GA BXU56
UT WOS:000297105600021
ER
PT S
AU Modi, M
Stanco, J
AF Modi, Mukund
Stanco, Joe
GP IEEE
TI Demonstrating the capabilities of IEEE SIMICA standards in support of
the DoD ATS Framework in a net-centric maintenance environment
SO IEEE AUTOTESTCON 2011: SYSTEMS READINESS TECHNOLOGY CONFERENCE
SE IEEE Autotestcon
LA English
DT Proceedings Paper
CT IEEE AUTOTESTCON - Systems Readiness Technology Conference
CY SEP 12-15, 2011
CL Baltimore, MD
SP Inst Elect & Elect Engineers (IEEE), IEEE Aerosp & Elect Syst Soc (AESS), IEEE Instrumentat & Measurement Soc (IMS)
DE net-centric; semantic awarness
AB A family of standards, Software Interface for Maintenance Information Collection and Analysis (SIMICA), that meets the needs and objectives of the ATS Framework Working Group's [1] Maintenance Test Data and Services requirement has been developed by the Diagnostic Maintenance Committee (DMC) of IEEE SCC20. SIMICA is an implementation independent specification for a software interface between information systems that contain diagnosis and maintenance data. The SIMICA standard [2] addresses the collection, exchange, and analysis of the data. Two approved trial use standards were the focus of the Phase III demonstration that took place at AUTOTESTCON in 2010. This demonstration showed the utilization of these standards in the documentation of the maintenance actions associated with the removal, repair, and replacement of system components required to maintain / support an operational system and the test results that allows for the recording of the test execution and observations. This paper outlines the processes and the application of the standards required to share information in a net-centric environment and demonstrates this capability.
C1 [Modi, Mukund] Naval A Sys Command, Lakehurst, NJ USA.
[Stanco, Joe] Support Syst Associat, Lakehurst, NJ USA.
RP Modi, M (reprint author), Naval A Sys Command, Lakehurst, NJ USA.
EM mukund.modi@navy.mil; jstanco@ssai.org
NR 16
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1088-7725
BN 978-1-4244-9361-6
J9 IEEE AUTOTESTCON
PY 2011
BP 189
EP 196
PG 8
WC Engineering, Electrical & Electronic
SC Engineering
GA BXU56
UT WOS:000297105600030
ER
PT S
AU Headrick, WJ
Davis, TW
Bodkin, MA
Dusch, K
Fox, RR
Wolfe, D
AF Headrick, William J.
Davis, Timothy W.
Bodkin, Michael A.
Dusch, Kevin
Fox, Robert R.
Wolfe, Dan
GP IEEE
TI Signal Based Domain Specific Language (SBDSL) a proposal for a Next
Generation Test
SO IEEE AUTOTESTCON 2011: SYSTEMS READINESS TECHNOLOGY CONFERENCE
SE IEEE Autotestcon
LA English
DT Proceedings Paper
CT IEEE AUTOTESTCON - Systems Readiness Technology Conference
CY SEP 12-15, 2011
CL Baltimore, MD
SP Inst Elect & Elect Engineers (IEEE), IEEE Aerosp & Elect Syst Soc (AESS), IEEE Instrumentat & Measurement Soc (IMS)
AB Signal Based Domain Specific Language (SBDSL) is a domain specific language which combines the use of ATLAS Signal statements with high-level programming language constructs. The goals of this new language are: facilitate the writing of concurrent test programs, provide a language that is easy to extend with new constructs, maintain backwards compatibility with ATLAS Family of languages, enable interoperability between test stations, and enable engineers' fresh out of college to quickly become productive with a test programming language. This paper will cover how the design of the SBDSL language, SBDSL Integrated Development Environment (IDE) and runtime executable will accomplish these goals and present results from the technology demonstration developed.
C1 [Headrick, William J.; Bodkin, Michael A.] Lockheed Martin Global Training & Logist GTL, 100 Global Innovat Circle, Orlando, FL 32825 USA.
[Davis, Timothy W.; Fox, Robert R.] NAVAIR, Jacksonville, FL 32221 USA.
[Dusch, Kevin] NAVAIR, Kevin Dusch, MD 20620 USA.
[Wolfe, Dan] NAVAIR Support Contract, Jacksonville, FL 32221 USA.
RP Headrick, WJ (reprint author), Lockheed Martin Global Training & Logist GTL, 100 Global Innovat Circle, Orlando, FL 32825 USA.
EM William.J.Headrick@lmco.com; Timothy.W.Davis1@navy.mil;
Michael.A.Bodkin@lmco.com; Kevin.Dusch@navy.mil; Robert.R.Fox@navy.mil;
Dan.Wolfe@navy.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1088-7725
BN 978-1-4244-9361-6
J9 IEEE AUTOTESTCON
PY 2011
BP 240
EP 244
PG 5
WC Engineering, Electrical & Electronic
SC Engineering
GA BXU56
UT WOS:000297105600038
ER
PT S
AU Burger, M
Jaworowski, C
Meseroll, R
AF Burger, Michael
Jaworowski, Christopher
Meseroll, Robert
GP IEEE
TI V-22 Aircraft Flight Data Mining
SO IEEE AUTOTESTCON 2011: SYSTEMS READINESS TECHNOLOGY CONFERENCE
SE IEEE Autotestcon
LA English
DT Proceedings Paper
CT IEEE AUTOTESTCON - Systems Readiness Technology Conference
CY SEP 12-15, 2011
CL Baltimore, MD
SP Inst Elect & Elect Engineers (IEEE), IEEE Aerosp & Elect Syst Soc (AESS), IEEE Instrumentat & Measurement Soc (I&M)
DE V-22; data-mining; text-mining; maintenance actions; diagnostics
AB The Naval Air Systems Command (NAVAIR) produces and supports highly complex aircraft weapons systems which provide advanced capabilities required to defend U. S. freedoms. Supporting said complex systems such as the MV-22/CV-22 aircraft requires being able to troubleshoot and mitigate complex failure modes in dynamic operational environments. Since an aircraft is comprised of multiple systems designed by specialty sub-vendors and subsequently brought together by an aircraft integrator, diagnostics at the aircraft level are usually "good enough" but not capable of 100% fault isolation to a single component. Today's system components must be highly integrated and are required to communicate via high speed data-bus conduits which require precise synchronization between systems. Failure modes of aircraft are identified via design, analysis and test prior to fielding of the weapon system. However, not all failure modes are typically known at the time of system Initial Operational Capability, but rather are found in the field by maintainers/pilots and then subsequently mitigated with aircraft engineering changes or system replacements. Also, the requirement for increased capabilities can drive the need for new systems to be integrated into an aircraft system that may not have been considered in the initial design and support concept. There is a plethora of maintenance action detail collected by pilots, maintenance officers (MO) and engineers that can and should be used to identify failure mode trends that come to light during the operational phase of an aircraft. New troubleshooting techniques can be developed to address underlying failure modes to increase efficiency of future maintenance actions thus reducing the logistics trail required to support the aircraft. The elements available for analysis are maintenance results input by the MO/pilot, (including free form comments regarding problems and resulting actions), Built-In-Test (BIT) fault codes recorded during a flight, and off-aircraft test equipment (such as Consolidated Automated Support System CASS) historical test results. The Integrated Support Environment (ISE) is collecting the data required to perform analysis of underlying maintenance trends that can be identified using some specialized software data mining tools such as text mining of corrective action and maintainer comments data fields from maintenance results. The findings or knowledge extracted from text mining can be correlated back to fault codes recorded during flight and historical maintenance results to help mitigate issues with broken troubleshooting procedures causing headaches to the our Sailors and Marines in the field. By tagging key phrases from the maintainer's/pilot's remarks, knowledge can be gleaned into how the aircraft fails in vigorous environments. The premise of this research is to first choose an apparent high failure avionics system on the V-22 aircraft that is experiencing a high removal rate from the aircraft but subsequently found to be fully operational when tested on CASS. The results of this analysis should present potential root causes for "Cannot Duplicate" situations by recommending an augmentation of diagnostics at the aircraft level to avoid removing and replacing a system that has not failed even though it has reported bad via the aircraft diagnostics. This research will utilize the Net-Centric Diagnostics Framework (NCDF) to retrieve past Smart Test Program Set (TPS) results/BIT sequence strings as a variable for identifying trends in V-22 aircraft maintenance actions.
The results of theresearch will be socialized with the V-22 avionics Fleet Support Team and the Comprehensive Automated Maintenance Environment Optimized (CAMEO) for validation of findings before any troubleshooting changes are recommended. If required, the Integrated Diagnostics and Automated Test Systems group will perform an engineering analysis of problem and suggest an enhanced diagnostic technique to mitigate the issue.
C1 [Burger, Michael; Jaworowski, Christopher; Meseroll, Robert] USN, Air Syst Command, Lakehurst, NJ USA.
RP Burger, M (reprint author), USN, Air Syst Command, Lakehurst, NJ USA.
NR 5
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1088-7725
BN 978-1-4244-9361-6
J9 IEEE AUTOTESTCON
PY 2011
BP 443
EP 447
PG 5
WC Engineering, Electrical & Electronic
SC Engineering
GA BXU56
UT WOS:000297105600072
ER
PT S
AU Pollock, SS
Alt, JK
Darken, CJ
AF Pollock, Shawn S.
Alt, Jonathan K.
Darken, Christian J.
BE Salerno, J
Yang, SJ
Nau, D
Chai, SK
TI Representing Trust in Cognitive Social Simulations
SO SOCIAL COMPUTING, BEHAVIORAL-CULTURAL MODELING AND PREDICTION
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 4th International Conference on Social Computing, Behavioral-Cultural
Modeling and Prediction
CY MAR 29-31, 2011
CL Coll Pk, MD
DE trust; cognition; society
AB Trust plays a critical role in communications, strength of relationships, and information processing at the individual and group level. Cognitive social simulations show promise in providing an experimental platform for the examination of social phenomena such as trust formation. This paper describes the initial attempts at representation of trust in a cognitive social simulation using reinforcement learning algorithms centered around a cooperative Public Commodity game within a dynamic social network.
C1 [Pollock, Shawn S.; Alt, Jonathan K.; Darken, Christian J.] USN, MOVES Inst, Postgrad Sch, Monterey, CA 93943 USA.
RP Pollock, SS (reprint author), USN, MOVES Inst, Postgrad Sch, Monterey, CA 93943 USA.
EM sspolloc@nps.edu; jkalt@nps.edu; cjdarken@nps.edu
NR 10
TC 0
Z9 0
U1 0
U2 3
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-642-19655-3
J9 LECT NOTES COMPUT SC
PY 2011
VL 6589
BP 301
EP 308
PG 8
WC Computer Science, Information Systems; Computer Science, Software
Engineering; Computer Science, Theory & Methods
SC Computer Science
GA BXT86
UT WOS:000297039300042
ER
PT S
AU Chung, H
Polak, E
Royset, JO
Sastry, SS
AF Chung, H.
Polak, E.
Royset, J. O.
Sastry, S. S.
GP IEEE
TI Optimal Periodic Patrolling Trajectories of UUVs Guarding a Channel
SO 2011 AMERICAN CONTROL CONFERENCE
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUN 29-JUL 01, 2011
CL San Francisco, CA
SP Boeing, Bosch, Corning, Eaton, GE Global Res, Honeywell, Lockheed Martin, MathWorks, Natl Instruments, NT-MDT, United Technol
ID OPTIMAL SEARCH; TARGET
AB Given a number of patrollers, the channel patrol problem consists of determining the periodic trajectories that the patrollers must trace out so as to maximize the probability of detection of the intruder. We formulate this problem as an optimal control problem. We assume that the patrollers' sensors are imperfect and that their motions are subject to turn-rate constraints, and that the intruder travels straight down a channel with constant speed.
Using discretization of time and space, we approximate the optimal control problem with a large-scale nonlinear programming problem which we solve to obtain an approximately stationary solution and a corresponding optimized trajectory for each patroller. In numerical tests, we obtain new insight not easily obtained using geometric calculations - into efficient patrol trajectory design for up to two patrollers in a narrow channel where interaction between the patrollers is unavoidable due to their limited turn rate.
C1 [Chung, H.] Monash Univ, Dept Mech & Aerosp Enigneering, Clayton, Vic 3800, Australia.
[Polak, E.; Sastry, S. S.] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA.
[Royset, J. O.] Naval Postgrad Sch, Dept Operat Res, Monterey, CA USA.
RP Chung, H (reprint author), Monash Univ, Dept Mech & Aerosp Enigneering, Clayton, Vic 3800, Australia.
EM Hoam.Chung@monash.edu; polak@eecs.berkeley.edu; joroyset@nps.edu;
sastry@eecs.berkeley.edu
FU ONR MURI "Computational Methods for Collaborative Motion" (CoMotion);
ARO MURI "Scalable SWARMS of Autonomous Robots and Mobile Sensors"
(SWARMS); AFOSR Young Investigator [F1ATA08337G003]
FX The first, second, and fourth authors were partially supported by ONR
MURI Computational Methods for Collaborative Motion (CoMotion), and ARO
MURI Scalable SWARMS of Autonomous Robots and Mobile Sensors (SWARMS).
The third author is supported by AFOSR Young Investigator grant
F1ATA08337G003.
NR 13
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4577-0081-1
J9 P AMER CONTR CONF
PY 2011
BP 888
EP 893
PG 6
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA BWZ06
UT WOS:000295376001067
ER
PT S
AU Selbach-Allen, ME
McIlhany, KL
Gentry, SE
AF Selbach-Allen, Megan E.
McIlhany, Kevin L.
Gentry, Sommer E.
GP IEEE
TI Optimization and Pose Selection for a Lindy Hop Partnered Spin
SO 2011 AMERICAN CONTROL CONFERENCE
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUN 29-JUL 01, 2011
CL San Francisco, CA
SP Boeing, Bosch, Corning, Eaton, GE Global Res, Honeywell, Lockheed Martin, MathWorks, Natl Instruments, NT-MDT, United Technol
AB Swing dancers often talk about using the laws of physics in performing their physically rigorous jumps, lifts, and spins. Do expert swing dancers physically optimize their pose for a partnered spin? In a partnered spin, two dancers connect hands and spin as a unit around a single vertical axis. We describe the pose of a couple by the angles of their joints in a two-dimensional plane and compare expert and novice dancers' actual poses to the approximately ideal poses generated from a biomechanical optimization model.
The optimization objective is to maximize rotational acceleration, by minimizing the resistance to spin, but still producing torque. The model considers only external forces and neglects internal forces. It consists of equations derived from physical principles such as Newton's laws and moment of inertia calculations. Using numerical non-linear optimization we find the pose for each couple that maximizes their rotational acceleration. Different dancers are differently sized, so every couple has a unique optimal pose. Each couple's optimal pose is compared to the pose they actually assumed for the spin.
We used motion capture to determine the angles of the joints in the couple's actual pose. The couple's actual pose is used to calculate a predicted rotational acceleration. This predicted acceleration is then compared to the optimal acceleration to determine a fraction of optimal for each couple. We hypothesized that expert swing dancers would achieve a higher fraction of their optimal acceleration than beginners. Our results did not achieve statistical significance with a simplified model and a small sample of 10 couples.
C1 [Selbach-Allen, Megan E.] Univ Liverpool, Dept Math, Liverpool L69 3BX, Merseyside, England.
[McIlhany, Kevin L.] US Naval Acad, Dept Phys, Annapolis, MD 21402 USA.
[Gentry, Sommer E.] US Naval Acad, Dept Math, Annapolis, MD 21402 USA.
RP Selbach-Allen, ME (reprint author), Univ Liverpool, Dept Math, Liverpool L69 3BX, Merseyside, England.
NR 7
TC 0
Z9 0
U1 1
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4577-0081-1
J9 P AMER CONTR CONF
PY 2011
BP 3831
EP 3836
PG 6
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA BWZ06
UT WOS:000295376004108
ER
PT S
AU Aguilar, CO
Krener, AJ
AF Aguilar, Cesar O.
Krener, Arthur J.
GP IEEE
TI Piecewise smooth solutions to the nonlinear output regulation PDE
SO 2011 AMERICAN CONTROL CONFERENCE
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUN 29-JUL 01, 2011
CL San Fransisco, CA
SP Boeing, Bosch, Corning, Eaton, GE Global Res, Honeywell, Lockheed Martin, MathWorks, Natl Instruments, NT-MDT, United Technol
AB The solution to the nonlinear output regulation problem requires one to solve a first order PDE, known as the Francis-Byrnes-Isidori (FBI) equations. In this paper we propose a method to compute approximate solutions to the FBI equations when the zero dynamics of the plant are hyperbolic and the exosystem is two-dimensional. Our method relies on the periodic nature of two-dimensional analytic center manifolds.
C1 [Aguilar, Cesar O.; Krener, Arthur J.] USN, Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
RP Aguilar, CO (reprint author), USN, Postgrad Sch, Dept Appl Math, 833 Dyer Rd,Bldg 232, Monterey, CA 93943 USA.
EM coaguila@nps.edu; ajkrener@nps.edu
NR 6
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4577-0081-1
J9 P AMER CONTR CONF
PY 2011
PG 2
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA BWZ06
UT WOS:000295376002007
ER
PT J
AU Sekhavat, P
Yan, H
Fleming, A
Ross, IM
Alfriend, KT
AF Sekhavat, Pooya
Yan, Hui
Fleming, Andrew
Ross, I. Michael
Alfriend, Kyle T.
TI Closed-Loop Time-Optimal Attitude Maneuvering of Magnetically Actuated
Spacecraft
SO JOURNAL OF THE ASTRONAUTICAL SCIENCES
LA English
DT Article
ID REORIENTATION; FEEDBACK
AB This paper examines the performance of the pseudospectral optimal control scheme for closed-loop time-optimal attitude maneuvering of the NPSAT1 spacecraft, a magnetically actuated spacecraft designed and built at the Naval Postgraduate School. The closed-loop control is devised and implemented using the notion of Caratheodory-pi solutions: repeated computation and update of the complete open-loop control solution in real-time. The performance of the pseudospectral feedback-control scheme is compared to a standard state feedback-control technique. It is shown that the use of standard state feedback control leads to significantly slower convergence time and may lead to substantially lower performance metrics. The substantial performance gains when using closed-loop optimal control are attributed to the optimal scheme's ability to exploit the full maneuverability envelope of the spacecraft by applying bang-bang controls in all three directions. In contrast, traditional gain-based feedback control laws substantially limit the performance of the vehicle to well below its physical capabilities. The feasibility of each open-loop optimal control solution is verified by numerical propagation while Pontryagin's necessary conditions for optimality are used to verify the solution's optimality.
C1 [Sekhavat, Pooya; Yan, Hui; Alfriend, Kyle T.] Texas A&M Univ, Dept Aerosp Engn, College Stn, TX 77843 USA.
[Fleming, Andrew] Leffler Consulting LLC, Chantilly, VA 20151 USA.
[Ross, I. Michael] USN, Postgrad Sch, Dept Mech & Astronaut Engn, Code ME Ro, Monterey, CA 93943 USA.
RP Sekhavat, P (reprint author), Texas A&M Univ, Dept Aerosp Engn, College Stn, TX 77843 USA.
EM psekhava@nps.edu; imross@nps.edu; alfriend@tamu.edu
NR 36
TC 2
Z9 2
U1 0
U2 2
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 0021-9142
EI 2195-0571
J9 J ASTRONAUT SCI
JI J. Astronaut. Sci.
PD JAN-MAR
PY 2011
VL 58
IS 1
BP 81
EP 97
PG 17
WC Engineering, Aerospace
SC Engineering
GA 827IZ
UT WOS:000295423500006
ER
PT J
AU Lin, K
Dayton, J
AF Lin, Kyle
Dayton, Jeffrey
TI Game-Theoretic Models for Jamming Radio-Controlled Improvised Explosive
Devices
SO MILITARY OPERATIONS RESEARCH
LA English
DT Article
AB Radio-controlled improvised explosive devices (RCIEDs) have been a major weapon of choice by Iraqi insurgents since 2003. One effective way to prevent an RCIED attack is to use electronic jamming devices to interfere with the communication between the trigger and the bomb itself. Due to power constraints and other considerations, however, a jammer usually cannot jam all triggers simultaneously. In this paper, we develop game-theoretic models to study both active jamming and reactive jamming. For active jamming, we compute the optimal mixed strategy by linear programming; for reactive jamming, we use an iterative method. Finally, we numerically demonstrate our models and their applications.
C1 [Lin, Kyle] Naval Postgrad Sch, Monterey, CA USA.
RP Lin, K (reprint author), Naval Postgrad Sch, Monterey, CA USA.
EM kylin@nps.edu; jeffrey.dayton@us.army.mil
OI Lin, Kyle/0000-0002-3769-1891
NR 6
TC 0
Z9 0
U1 0
U2 2
PU MILITARY OPERATIONS RESEARCH SOC
PI ALEXANDRIA
PA 1703 N BEAUREGARD ST, STE 450, ALEXANDRIA, VA 22311-1717 USA
SN 0275-5823
J9 MIL OPER RES
JI Mil. Oper. Res.
PY 2011
VL 16
IS 3
BP 5
EP 13
DI 10.5711/1082598316305
PG 9
WC Operations Research & Management Science
SC Operations Research & Management Science
GA 847BP
UT WOS:000296947200001
ER
PT J
AU Gallacher, PC
Hebert, DA
Schaferkotter, MR
AF Gallacher, P. C.
Hebert, D. A.
Schaferkotter, M. R.
TI Nesting a nonhydrostatic model in a hydrostatic model: The boundary
interface
SO OCEAN MODELLING
LA English
DT Article
DE Nonhydrostatic model; Boundary conditions; Nested models; Prediction;
Internal waves; Nonlinear waves
ID OCEAN MODEL; RESOLUTION; IMPLEMENTATION; AREA
AB A method is developed for adjusting the values of the prognostic variables near the interface between a nonhydrostatic, high resolution model embedded in a hydrostatic, coarser resolution model. It incorporates a method of conditioning the outer domain lateral boundary values to enforce conservation of volume when the variables are interpolated onto the inner domain grid. This is accomplished by adjusting the baroclinic normal velocities at the open boundaries after interpolation. The method also includes a relaxation scheme which matches the values of the prognostic variables across a narrow zone near the open boundaries of the submesoscale inner domain. This prevents the development of discontinuities, reflections and perimeter currents at the periphery of the inner domain. Submesoscale hindcasts are conducted in areas of high Nonlinear Internal Wave (NLIW) activity. Since NLIWs have amplitudes, O(100 m), which are not small relative to their wavelengths, O(100 - 1000 m) these hindcasts require a nonhydrostatic model in the inner domain. Since the hydrostatic model lacks the physics and resolution to support NLIWs there will be discrepancies between the values of the hydrostatic and nonhydrostatic prognostic variables at the boundaries. It is shown that the application of these method for adjusting the values of the prognostic variables near the interface allows the computation of a nonhydrostatic, submesoscale hindcast forced by a nested hydrostatic forecasting system. Published by Elsevier Ltd.
C1 [Gallacher, P. C.; Hebert, D. A.] USN, Res Lab, Ocean Sci Div, Stennis Space, MS 39529 USA.
[Schaferkotter, M. R.] Jacobs Technol Inc, Ft Walton Beach, FL 32547 USA.
RP Gallacher, PC (reprint author), USN, Res Lab, Ocean Sci Div, Code 7331,Bldg 1009, Stennis Space Ctr, MS 39529 USA.
EM Patrick.Gallacher@nrlssc.navy.mil
FU ONR Internal Waves in Straits Experiment DRI (IWISE) [N0001409WX20632];
ONR Philippines Straits Experiment (PhilEx) DRI [N0001411AF00002]; ONR
Non Linear Waves Initiative (NLIWI) DRI [N0001408WX20931]; High
Performance Computing Modernization Program (HPCMP) project
Nonhydrostatic Ocean Modeling [NRLSS30275065]
FX This research was supported by the ONR Internal Waves in Straits
Experiment DRI (IWISE - N0001409WX20632), the ONR Philippines Straits
Experiment (PhilEx) DRI (N0001411AF00002) and the ONR Non Linear Waves
Initiative (NLIWI) DRI (N0001408WX20931). The numerical experiments were
conducted at the NAVY DoD Supercomputer Resource Center (DSRC) and the
ERDC DSRC and were supported by the High Performance Computing
Modernization Program (HPCMP) project Nonhydrostatic Ocean Modeling
(NRLSS30275065).
NR 27
TC 3
Z9 3
U1 0
U2 4
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1463-5003
J9 OCEAN MODEL
JI Ocean Model.
PY 2011
VL 40
IS 2
BP 190
EP 198
DI 10.1016/j.ocemod.2011.08.006
PG 9
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 847EP
UT WOS:000296955000006
ER
PT S
AU Butler, JT
Sasao, T
AF Butler, Jon T.
Sasao, Tsutomu
BE Koch, A
Krishnamurthy, R
McAllister, J
Woods, R
ElGhazawi, T
TI Index to Constant Weight Codeword Converter
SO RECONFIGURABLE COMPUTING: ARCHITECTURES, TOOLS AND APPLICATIONS
SE Lecture Notes in Computer Science
LA English
DT Proceedings Paper
CT 7th International Symposium on Applied Reconfigurable Computing, ARC
2011
CY MAR 23-25, 2011
CL Belfast, NORTH IRELAND
SP Queens Univ Belfast
ID CODES
AB A constant weight codeword is a binary n-tuple with exactly r 1's. We show two circuits that generate constant; weight codewords. The first is based on the combinatorial number system. Its input is an index to the codeword. That is, there are ((n)(T)) n-bit codewords with exactly r l's. The index generates a unique codeword, and is a binary number between 0 and ((n)(r)) - 1. Such a circuit is useful for encoding data. If a random constant weight codeword is needed, as in Monte Carlo simulations, then the index is random. If a random constant weight codeword only is needed, then our other circuit is even more compact. It is based on a trellis configuration. Both designs can be pipelined to produce one constant weight codeword per clock period. We give experimental results showing the efficiency of our designs on the SRC-6 reconfigurable computer.
C1 [Butler, Jon T.] Naval Postgrad Sch, Monterey, CA 93921 USA.
[Sasao, Tsutomu] Kyushu Inst Technol, Iizuka, Fukuoka 820, Japan.
RP Butler, JT (reprint author), Naval Postgrad Sch, Monterey, CA 93921 USA.
EM jon_butler@msn.com; sasao@cse.kyutech.ac.jp
FU Japan Society for the Promotion of Science (JSPS); Knowledge Cluster
Initiative of MEXT (Ministry of Education, Culture, Sports, Science and
Technology)
FX We thank Jon Huppenthal, President and CEO of SRC Computers, Inc.,
Colorado Springs, CO for data used in this paper. This research is
supported by a Grant-in-Aid for Scientific Research of the Japan Society
for the Promotion of Science (JSPS) and a Knowledge Cluster Initiative
(the second stage) of MEXT (Ministry of Education, Culture, Sports,
Science and Technology). Two referees provided suggestions that improved
the manuscript.
NR 22
TC 2
Z9 2
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-642-19474-0
J9 LECT NOTES COMPUT SC
PY 2011
VL 6578
BP 193
EP +
PG 3
WC Computer Science, Information Systems; Computer Science, Software
Engineering; Computer Science, Theory & Methods
SC Computer Science
GA BXS07
UT WOS:000296894200021
ER
PT S
AU Peil, S
Crane, S
Hanssen, J
Swanson, TB
Ekstrom, CR
AF Peil, Steven
Crane, Scott
Hanssen, James
Swanson, Thomas B.
Ekstrom, Christopher R.
GP IEEE
TI Measurements with Multiple Operational Fountain Clocks
SO 2011 JOINT CONFERENCE OF THE IEEE INTERNATIONAL FREQUENCY CONTROL
SYMPOSIUM/EUROPEAN FREQUENCY AND TIME FORUM PROCEEDINGS
SE IEEE International Frequency Control Symposium
LA English
DT Proceedings Paper
CT 5th Joint Conference of the 65th IEEE International Frequency Control
Symposium/25th European Frequency and Time Forum
CY MAY 01-05, 2011
CL San Fransisco, CA
SP IEEE, IEEE UFFC, EFTF
AB Performance of the first two operational rubidium fountains at the USNO is presented using relative measurements and comparisons against other timescales. Recent results with four fountains indicate frequency agreement at the 10(-15) level and good agreement with the primary frequency standards contributing to TAI.
C1 [Peil, Steven; Crane, Scott; Hanssen, James; Swanson, Thomas B.; Ekstrom, Christopher R.] USN Observ, Clock Dev Div, Washington, DC 20392 USA.
RP Peil, S (reprint author), USN Observ, Clock Dev Div, Washington, DC 20392 USA.
EM steven.peil@usno.navy.mil
NR 3
TC 3
Z9 3
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1075-6787
BN 978-1-61284-110-6
J9 P IEEE INT FREQ CONT
PY 2011
BP 58
EP 60
PG 3
WC Engineering, Electrical & Electronic; Physics, Applied;
Telecommunications
SC Engineering; Physics; Telecommunications
GA BWX38
UT WOS:000295261600014
ER
PT S
AU Hanssen, JL
Crane, SG
Ekstrom, CR
AF Hanssen, J. L.
Crane, S. G.
Ekstrom, C. R.
GP IEEE
TI One-Way Temperature Compensated Fiber Link
SO 2011 JOINT CONFERENCE OF THE IEEE INTERNATIONAL FREQUENCY CONTROL
SYMPOSIUM/EUROPEAN FREQUENCY AND TIME FORUM PROCEEDINGS
SE IEEE International Frequency Control Symposium
LA English
DT Proceedings Paper
CT 5th Joint Conference of the 65th IEEE International Frequency Control
Symposium/25th European Frequency and Time Forum
CY MAY 01-05, 2011
CL San Fransisco, CA
SP IEEE, IEEE UFFC, EFTF
ID UNCERTAINTY
AB We will discuss our work on a one-way optical fiber frequency transfer system. The link removes thermally generated delays through sensing the difference in temperature dependent changes in the group index of the fiber for two wavelengths. The system monitors the phase difference between two amplitude-modulated lasers at the edges of the C-band. Using this signal, a temperature controlled spool of fiber compensates for thermally induced phase excursions in the link. We will present preliminary results as well as a discussion of performance limitations.
C1 [Hanssen, J. L.; Crane, S. G.; Ekstrom, C. R.] USN Observ, Time Serv Dept, Washington, DC 20392 USA.
RP Hanssen, JL (reprint author), USN Observ, Time Serv Dept, Washington, DC 20392 USA.
EM james.hanssen@usno.navy.mil
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1075-6787
BN 978-1-61284-110-6
J9 P IEEE INT FREQ CONT
PY 2011
BP 939
EP 943
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied;
Telecommunications
SC Engineering; Physics; Telecommunications
GA BWX38
UT WOS:000295261600214
ER
PT S
AU Proia, A
Cibiel, G
White, J
Wilson, D
Senior, K
AF Proia, Amandine
Cibiel, Gilles
White, J.
Wilson, D.
Senior, K.
GP IEEE
TI Absolute calibration of GNSS time transfer systems: NRL and CNES
techniques comparison
SO 2011 JOINT CONFERENCE OF THE IEEE INTERNATIONAL FREQUENCY CONTROL
SYMPOSIUM/EUROPEAN FREQUENCY AND TIME FORUM PROCEEDINGS
SE IEEE International Frequency Control Symposium
LA English
DT Proceedings Paper
CT 5th Joint Conference of the 65th IEEE International Frequency Control
Symposium / 25th European Frequency and Time Forum
CY MAY 01-05, 2011
CL San Francisco, CA
SP IEEE, IEEE UFFC, EFTF
AB The GNSS reception chains (timing receiver + antenna + antenna cable) are used to perform time comparisons of remote atomic clocks. This time transfer system represents the basis of the time laboratories contributions for the realization of the Temps Atomique International (TAI). The calibration of these chains are necessary to ensure accuracy and long term stability of time links used in TAI but also in precise time station (PTS) dedicated to GALILEO.
Currently, the most widely used approach to determine the electrical-delay of these devices is the differential method developed by the BIPM (Bureau des Poids et Mesures). Another solution is the absolute calibration of each reception chain element in using artificial signals. This method was first defined and put into operation by NRL (Naval Research Laboratory) and the University of Colorado. In 2005, CNES (Centre National d'Etudes Spatiales) decided to develop this technique with a similar approach.
This paper will compare the results of NRL and CNES absolute calibrations performed on two different time transfer systems. First of all, it will describe the calibration method used by each laboratory and the differences which characterize them. An uncertainty budget will be presented for the results of both calibration techniques. Then, both time transfer systems, composed of different receivers and antennas models, will be described briefly. Finally, the absolute calibrations results performed using the NRL and the CNES methods will be compared..
C1 [Proia, Amandine; Cibiel, Gilles] Ctr Natl Etud Spatiales, 18 Ave Edouard Belin, F-31055 Toulouse, France.
[Proia, Amandine] Bur Int Poids & Mesures, Sevres, France.
[White, J.; Wilson, D.; Senior, K.] Naval Res Lab, Washington, DC USA.
RP Proia, A (reprint author), Ctr Natl Etud Spatiales, 18 Ave Edouard Belin, F-31055 Toulouse, France.
EM amandine.proia@cnes.fr
NR 8
TC 2
Z9 2
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1075-6787
BN 978-1-61284-110-6
J9 P IEEE INT FREQ CONT
PY 2011
BP 1058
EP 1063
PG 6
WC Engineering, Electrical & Electronic; Physics, Applied;
Telecommunications
SC Engineering; Physics; Telecommunications
GA BWX38
UT WOS:000295261600237
ER
PT J
AU Hardy, CG
Larsen, CT
Holladay, SD
Johnson, MS
Gogal, RM
AF Hardy, Chistopher G.
Larsen, Calvert T.
Holladay, Steven D.
Johnson, Mark S.
Gogal, Robert M., Jr.
TI A comparison of plasma and tissue ascorbic acid levels in turkeys, quail
and chickens using a rapid, modified reduction-based colorimetric assay
SO AVIAN BIOLOGY RESEARCH
LA English
DT Article
DE ascorbic acid; chicken; feed; plasma; quail; spleen; turkey
ID VITAMIN-C; HEAT-STRESS; ANTIOXIDANT STATUS; BROILER-CHICKENS; IN-VITRO;
SUPPLEMENTATION; PERFORMANCE; RESPONSES; OXIDASE; DAMAGE
AB Ascorbic acid (AA) enhances innate immunity, alters gene expression and functions as a co-factor in specific enzyme reactions. Birds are unique in that they can synthesise ascorbic acid whereas humans and rodents lack this ability. Diagnostic tests that currently exist to measure ascorbic acid levels in birds are time-consuming and expensive. In the present study, a modified and improved reduction-based colorimetric assay was evaluated in turkeys, quail and chickens. The assay was rapid for quantifying ascorbic acid in plasma and tissue samples, and generated values consistent with those obtained using HPLC. Five breeds of heritage turkeys were studied, showing significant plasma AA differences among breeds and, within breeds, by sex. Quail displayed plasma AA levels similar to the corresponding values that were highest in turkeys, which again were significantly greater in males than females. Chicken plasma AA levels were comparable to the turkeys and quail. However, the spleens of chickens had AA levels more than 12-fold higher than plasma, which increased significantly with a 150 mg/kg AA feed supplement. These collective results show a broad utility for the modified AA assay, and demonstrate differences in birds by breed, sex and diet.
C1 [Hardy, Chistopher G.] USN, Med Ctr, Portsmouth, VA 23708 USA.
[Larsen, Calvert T.] Virginia Maryland Reg Coll Vet Med, Ctr Mol Med & Infect Dis, Blacksburg, VA 24060 USA.
[Holladay, Steven D.; Gogal, Robert M., Jr.] Univ Georgia, Coll Vet Med, Athens, GA 30602 USA.
[Johnson, Mark S.] USA, Ctr Hlth Promot & Prevent Med, Aberdeen Proving Ground, MD 21010 USA.
RP Hardy, CG (reprint author), USN, Med Ctr, Portsmouth, VA 23708 USA.
EM rgogal@uga.edu
FU USDA-SSARE
FX Thanks go to Margie Bender of the American Livestock Breeds Conservancy
for help with this study which was supported by a grant from the
USDA-SSARE.
NR 24
TC 0
Z9 0
U1 0
U2 3
PU SCIENCE REVIEWS 2000 LTD
PI ST ALBANS
PA PO BOX 314, ST ALBANS AL1 4ZG, HERTS, ENGLAND
SN 1758-1559
J9 AVIAN BIOL RES
JI Avian Biol. Res.
PY 2011
VL 4
IS 3
BP 103
EP 109
DI 10.3184/175815511X13142036933137
PG 7
WC Agriculture, Dairy & Animal Science; Ornithology; Zoology
SC Agriculture; Zoology
GA 843XD
UT WOS:000296709300002
ER
PT S
AU Leski, TA
Ansumana, R
Jimmy, DH
Bangura, U
Malanoski, AP
Lin, B
Stenger, DA
AF Leski, T. A.
Ansumana, R.
Jimmy, D. H.
Bangura, U.
Malanoski, A. P.
Lin, B.
Stenger, D. A.
BE Southern, SO
Montgomery, KN
Taylor, CW
Weigl, BH
Kumar, BVKV
Prabhakar, S
Ross, AA
TI Massively multiplexed microbial identification using resequencing DNA
microarrays for outbreak investigation
SO SENSING TECHNOLOGIES FOR GLOBAL HEALTH, MILITARY MEDICINE, DISASTER
RESPONSE, AND ENVIRONMENTAL MONITORING AND BIOMETRIC TECHNOLOGY FOR
HUMAN IDENTIFICATION VIII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Sensing Technologies for Global Health, Military Medicine,
Disaster Response, and Environmental Monitoring and Biometric Technology
for Human Identification VIII
CY APR 25-27, 2011
CL Orlando, FL
SP SPIE
DE outbreak investigation; influenza; resequencing microarray; broad range
pathogen detection; poultry infections
ID AVIAN INFLUENZA-VIRUS; PATHOGEN IDENTIFICATION; BROAD-SPECTRUM;
PANDEMICS; AGENTS
AB Multiplexed microbial diagnostic assays are a promising method for detection and identification of pathogens causing syndromes characterized by nonspecific symptoms in which traditional differential diagnosis is difficult. Also such assays can play an important role in outbreak investigations and environmental screening for intentional or accidental release of biothreat agents, which requires simultaneous testing for hundreds of potential pathogens.
The resequencing pathogen microarray (RPM) is an emerging technological platform, relying on a combination of massively multiplex PCR and high-density DNA microarrays for rapid detection and high-resolution identification of hundreds of infectious agents simultaneously.
The RPM diagnostic system was deployed in Sierra Leone, West Africa in collaboration with Njala University and Mercy Hospital Research Laboratory located in Bo.
We used the RPM-Flu microarray designed for broad-range detection of human respiratory pathogens, to investigate a suspected outbreak of avian influenza in a number of poultry farms in which significant mortality of chickens was observed. The microarray results were additionally confirmed by influenza specific real-time PCR. The results of the study excluded the possibility that the outbreak was caused by influenza, but implicated Klebsiella pneumoniae as a possible pathogen.
The outcome of this feasibility study confirms that application of broad-spectrum detection platforms for outbreak investigation in low-resource locations is possible and allows for rapid discovery of the responsible agents, even in cases when different agents are suspected. This strategy enables quick and cost effective detection of low probability events such as outbreak of a rare disease or intentional release of a biothreat agent.
C1 [Leski, T. A.; Malanoski, A. P.; Lin, B.; Stenger, D. A.] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
RP Leski, TA (reprint author), USN, Res Lab, Ctr Biomol Sci & Engn, Code 6900, Washington, DC 20375 USA.
EM tomasz.leski@nrl.navy.mil
RI Leski, Tomasz/K-6916-2013; Lin, Baochuan/A-8390-2009;
OI Leski, Tomasz/0000-0001-7688-9887; Lin, Baochuan/0000-0002-9484-0785;
Malanoski, Anthony/0000-0001-6192-888X
NR 25
TC 0
Z9 0
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-8603-5
J9 PROC SPIE
PY 2011
VL 8029
AR 802904
DI 10.1117/12.884782
PG 7
WC Computer Science, Information Systems; Remote Sensing; Optics
SC Computer Science; Remote Sensing; Optics
GA BXF13
UT WOS:000295931800004
ER
PT S
AU Coleman, JO
AF Coleman, Jeffrey O.
GP IEEE
TI Nonseparable Nth-Band Filters as Overlapping-Subarray Tapers
SO 2011 IEEE RADAR CONFERENCE (RADAR)
SE IEEE National Radar Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Radar Conference (RADAR)
CY MAY 23-27, 2011
CL Kansas City, MO
SP IEEE, IEEE Aerosp & Elect Syst Soc (AESS), IEEE Kansas City Sect, IEEE Microwave Theory & Tech Soc, IEEE Geosci & Remote Sensing Soc, KURSL
AB In a receive array "overlapped subarrays" refers to an array output formed as a weighted sum of subarray outputs themselves formed as identically weighted combinations of the outputs of overlapping element subsets. The system array factor becomes a product of two array factors with different periods, one associated with each sum, just as the frequency response of a two-stage IFIR filter in a DSP system is the product of two frequency responses with different periods. It is well known that an Nth-band filter can be the most efficient choice for an IFIR filter's first stage, but the corresponding array idea appears unknown.
Design examples apply modern optimization to nonseparable tapers, with three of four examples featuring Nth-band subarray tapers. Whether an Nth-band approach is best is not settled here and is properly context dependent: designs should be carried out both ways and compared. Further, a very small subarray taper can easily be Nth-band entirely by accident, so designers should be aware of the associated array-factor features that necessarily result and cannot be optimized away.
C1 USN, Res Lab, Div Radar, Washington, DC 20375 USA.
RP Coleman, JO (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
NR 7
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5659
BN 978-1-4244-8902-2
J9 IEEE NATL RADAR CONF
PY 2011
BP 141
EP 146
PG 6
WC Engineering, Electrical & Electronic; Remote Sensing; Telecommunications
SC Engineering; Remote Sensing; Telecommunications
GA BWZ74
UT WOS:000295457000029
ER
PT S
AU Srinivas, U
Monga, V
Raj, RG
AF Srinivas, Umamahesh
Monga, Vishal
Raj, Raghu G.
GP IEEE
TI META-CLASSIFIERS FOR EXPLOITING FEATURE DEPENDENCIES IN AUTOMATIC TARGET
RECOGNITION
SO 2011 IEEE RADAR CONFERENCE (RADAR)
SE IEEE National Radar Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Radar Conference (RADAR)
CY MAY 23-27, 2011
CL Kansas City, MO
SP IEEE, IEEE Aerosp & Elect Syst Soc (AESS), IEEE Kansas City Sect, IEEE Microwave Theory & Tech Soc, IEEE Geosci & Remote Sensing Soc, KURSL
ID SUPPORT VECTOR MACHINES
AB Of active interest in automatic target recognition (ATR) is the problem of combining the complementary merits of multiple classifiers. This is inspired by decades of research in the area which has seen a variety of fairly successful feature extraction techniques as well as decision engines being developed. While heuristically based fusion techniques are omnipresent, this paper explores a principled meta-classification strategy that is based on the exploitation of correlation between multiple feature extractors as well as decision engines. We present two learning algorithms respectively based on support vector machines and AdaBoost, which combine soft-outputs of state of the art individual classifiers to yield an overall improvement in recognition rates. Experimental results obtained from benchmark SAR image databases reveal that the proposed meta-classification strategies are not only asymptotically superior but also have better robustness to choice of training over state-of-the art individual classifiers.
C1 [Srinivas, Umamahesh; Monga, Vishal] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA.
[Raj, Raghu G.] US Navy, Res Lab, Washington, DC 20375 USA.
RP Srinivas, U (reprint author), Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA.
NR 20
TC 3
Z9 3
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5659
BN 978-1-4244-8902-2
J9 IEEE NATL RADAR CONF
PY 2011
BP 147
EP 151
PG 5
WC Engineering, Electrical & Electronic; Remote Sensing; Telecommunications
SC Engineering; Remote Sensing; Telecommunications
GA BWZ74
UT WOS:000295457000030
ER
PT S
AU Scholnik, DP
AF Scholnik, Dan P.
GP IEEE
TI Range-Ambiguous Clutter Suppression with Pulse-Diverse Waveforms
SO 2011 IEEE RADAR CONFERENCE (RADAR)
SE IEEE National Radar Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Radar Conference (RADAR)
CY MAY 23-27, 2011
CL Kansas City, MO
SP IEEE, IEEE Aerosp & Elect Syst Soc (AESS), IEEE Kansas City Sect, IEEE Microwave Theory & Tech Soc, IEEE Geosci & Remote Sensing Soc, KURSL
AB Conventional pulse-Doppler waveforms are the standard for radar detection in clutter due to their inherent robustness, especially to extended-range ambiguous clutter. The attendant drawbacks include coherent ambiguities and blind zones in range and/or Doppler, which require multiple coherent precessing intervals to resolve. Pulse-diverse waveforms, using techniques such as phase coding and nonuniform time offsets, can mitigate these drawbacks but at the cost of a significant reduction in clutter suppression using matched filtering. It is shown here that receive filtering optimized on a per-interval or per-range/Doppler-cell basis can provide these waveforms with clutter suppression over multiple range intervals, at the cost of significantly increased computation. Several examples illustrate the tradeoffs between different types of pulse diversity.
C1 USN, Res Lab, Div Radar, Washington, DC 20375 USA.
RP Scholnik, DP (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
NR 9
TC 3
Z9 5
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5659
BN 978-1-4244-8902-2
J9 IEEE NATL RADAR CONF
PY 2011
BP 336
EP 341
PG 6
WC Engineering, Electrical & Electronic; Remote Sensing; Telecommunications
SC Engineering; Remote Sensing; Telecommunications
GA BWZ74
UT WOS:000295457000068
ER
PT S
AU Chance, Z
Raj, RG
Love, DJ
AF Chance, Zachary
Raj, Raghu G.
Love, David J.
GP IEEE
TI Information-Theoretic Structure of Multistatic Radar Imaging
SO 2011 IEEE RADAR CONFERENCE (RADAR)
SE IEEE National Radar Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Radar Conference (RADAR)
CY MAY 23-27, 2011
CL Kansas City, MO
SP IEEE, IEEE Aerosp & Elect Syst Soc (AESS), IEEE Kansas City Sect, IEEE Microwave Theory & Tech Soc, IEEE Geosci & Remote Sensing Soc, KURSL
ID MIMO RADAR; ANTENNAS
AB Using an information theoretical perspective, we explore quantitative methods for exploiting the spatial diversity offered by multiple widely separated antennas for radar imaging applications. While decomposing the operation of multistatic radar into multiple bistatic components, we proceed to characterize relevant conditional mutual information quantities between the underlying channel and bistatic output signals. The target scene is statistically characterized to be imaged as following a GSM (Gaussian Scale Mixture) distribution with respect to a dictionary in which the image is sparse. Under these assumptions we derive a useful upper bound on the conditional mutual information structure of bistatic channels which we then deploy to optimize the transmitted waveform via a convex optimization algorithm. Simulation results demonstrate the utility of our information theoretic characterization of multistatic channels for radar imaging applications.
C1 [Chance, Zachary; Love, David J.] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA.
[Raj, Raghu G.] US Navy, Res Lab, Div Radar, Washington, DC USA.
RP Chance, Z (reprint author), Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA.
EM zchance@purdue.edu; raghu.raj@ieee.org; djlove@ecn.purdue.edu
RI Love, David/B-6205-2011
OI Love, David/0000-0001-5922-4787
NR 9
TC 2
Z9 2
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5659
BN 978-1-4244-8902-2
J9 IEEE NATL RADAR CONF
PY 2011
BP 853
EP 858
PG 6
WC Engineering, Electrical & Electronic; Remote Sensing; Telecommunications
SC Engineering; Remote Sensing; Telecommunications
GA BWZ74
UT WOS:000295457000171
ER
PT S
AU Vouras, P
AF Vouras, Peter
GP IEEE
TI ADAPTIVE TRANSMIT NULLING USING WAVEFORM EMBEDDED DITHERS
SO 2011 IEEE RADAR CONFERENCE (RADAR)
SE IEEE National Radar Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Radar Conference (RADAR)
CY MAY 23-27, 2011
CL Kansas City, MO
SP IEEE, IEEE Aerosp & Elect Syst Soc (AESS), IEEE Kansas City Sect, IEEE Microwave Theory & Tech Soc, IEEE Geosci & Remote Sensing Soc, KURSL
DE narrowband dithers; transmit nulling; adaptive beamforming; gradient
estimation
AB This paper describes a novel concept for performing adaptive transmit nulling in radars. Typically, the average depth of open-loop transmit nulls is limited by the Error Sidelobe Level (ESL) of an array. The ESL is determined by random errors in the array manifold, such as the residual calibration errors. Theoretically, it is possible to null below the ESL by using the backscatter from a target to create a null adaptively. The objective function to be minimized in this case is the power of the received backscatter in the direction of the target, which is assumed to be the same as the desired null direction. A potential drawback to this nulling approach would be long radar dwell times on the target to estimate the gradient of the objective function.
To accelerate the convergence of a closed-loop transmit nulling algorithm, this paper proposes a theoretical technique for estimating the gradient of the array beamformer output in near real time by embedding narrowband sinusoidal dithers in the transmitted waveform. Dithers are externally applied disturbances that have been used in control system and signal processing applications to mitigate the effects of nonlinearity, hysteresis, and quantization [1, 2]. Typically the dithers applied are wideband random signals, essentially additive noise. The dithers described in this paper are different however in that they are narrowband sinusoids. The proposed dithering technique has been successfully applied to optical communication links to achieve adaptation speeds on the order of microseconds, [3] - [7]. The simulated results in this paper are intended to demonstrate the feasibility of using narrowband dithers to perform adaptive transmit nulling in near real time on radars.
C1 USN, Div Radar, Res Lab, Washington, DC 20375 USA.
RP Vouras, P (reprint author), USN, Div Radar, Res Lab, Washington, DC 20375 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5659
BN 978-1-4244-8902-2
J9 IEEE NATL RADAR CONF
PY 2011
BP 874
EP 878
PG 5
WC Engineering, Electrical & Electronic; Remote Sensing; Telecommunications
SC Engineering; Remote Sensing; Telecommunications
GA BWZ74
UT WOS:000295457000175
ER
PT S
AU Higgins, T
Gerlach, K
Shackelford, AK
Blunt, SD
AF Higgins, Thomas
Gerlach, Karl
Shackelford, Aaron K.
Blunt, Shannon D.
GP IEEE
TI Aspects of Non-Identical Multiple Pulse Compression
SO 2011 IEEE RADAR CONFERENCE (RADAR)
SE IEEE National Radar Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Radar Conference (RADAR)
CY MAY 23-27, 2011
CL Kansas City, MO
SP IEEE, IEEE Aerosp & Elect Syst Soc (AESS), IEEE Kansas City Sect, IEEE Microwave Theory & Tech Soc, IEEE Geosci & Remote Sensing Soc, KURSL
AB Some radar systems utilize pulse agility to achieve higher range resolution or mitigate range ambiguities. However, transmitting different waveforms on a pulse-to-pulse basis can have deleterious effects when traditional pulse-Doppler processing is employed. In this paper a non-adaptive technique, entitled Non-Identical Multiple Pulse Compression (NIMPC), is derived that facilitates pulse-agile clutter cancellation and is readily implementable via fast convolution techniques. The new method is extended to account for clutter-Doppler spread as well as multiple range-ambiguous clutter intervals. NIMPC is assessed via simulation of a synthetic wideband pulse train.
C1 [Higgins, Thomas] Univ Kansas, Lawrence, KS 66045 USA.
[Higgins, Thomas; Shackelford, Aaron K.] US Navy, Res Lab, Div Radar, Washington, DC USA.
[Gerlach, Karl] ITT Corp, Mclean, VA USA.
[Blunt, Shannon D.] Univ Kansas, EECS Dept, Radar Syst Lab, Lawrence, KS USA.
RP Higgins, T (reprint author), Univ Kansas, Lawrence, KS 66045 USA.
FU Office of Naval Research Base Program; Radar Division of the Naval
Research Laboratory
FX This work was sponsored by the Office of Naval Research Base Program and
the Radar Division of the Naval Research Laboratory
NR 5
TC 2
Z9 2
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5659
BN 978-1-4244-8902-2
J9 IEEE NATL RADAR CONF
PY 2011
BP 895
EP 900
PG 6
WC Engineering, Electrical & Electronic; Remote Sensing; Telecommunications
SC Engineering; Remote Sensing; Telecommunications
GA BWZ74
UT WOS:000295457000179
ER
PT S
AU Romero, RA
Goodman, NA
AF Romero, Ric A.
Goodman, Nathan A.
GP IEEE
TI Adaptive Beamsteering for Search-and-Track Application with Cognitive
Radar Network
SO 2011 IEEE RADAR CONFERENCE (RADAR)
SE IEEE National Radar Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Radar Conference (RADAR)
CY MAY 23-27, 2011
CL Kansas City, MO
SP IEEE, IEEE Aerosp & Elect Syst Soc (AESS), IEEE Kansas City Sect, IEEE Microwave Theory & Tech Soc, IEEE Geosci & Remote Sensing Soc, KURSL
DE Cognitive Radar; Cognitive Radar Network; Search and Track; Matched
Illumination; Adaptive Beamsteering
AB In this paper, we introduce the concept of a Cognitive Radar Network (CRN). The goal of the radar platforms in a CRN is to cooperate in illuminating the radar channel in an efficient manner in an effort to search for moving targets. Moreover, when a detection is declared, the CRN should incorporate the tracking requirement into the illumination strategy. That is, the beamsteering strategy must exploit the radar channel uncertainty, which is a function of probabilistic representation of the channel. The radar channel uncertainty is dynamic and as such the CRN's beamsteering strategy should be dynamic. Here, we demonstrate a CRN by utilizing two static radar platforms that form a dynamic integrated search-and-track beamsteering strategy matched to the radar channel uncertainty.
C1 [Romero, Ric A.] USN, Postgrad Sch, Monterey, CA 93940 USA.
[Goodman, Nathan A.] Univ Arizona, Dept Elect & Comp Engn, Tucson, AZ USA.
RP Romero, RA (reprint author), USN, Postgrad Sch, Monterey, CA 93940 USA.
EM rnromero@nps.edu; goodman@ece.arizona.edu
FU ONR [N000140910338]
FX The authors acknowledge support from the ONR via grant #N000140910338.
NR 5
TC 7
Z9 7
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5659
BN 978-1-4244-8902-2
J9 IEEE NATL RADAR CONF
PY 2011
BP 1091
EP 1095
PG 5
WC Engineering, Electrical & Electronic; Remote Sensing; Telecommunications
SC Engineering; Remote Sensing; Telecommunications
GA BWZ74
UT WOS:000295457000216
ER
PT S
AU Kessler, DA
Oran, ES
Kaplan, CR
AF Kessler, D. A.
Oran, E. S.
Kaplan, C. R.
BE Levin, DA
Wysong, IJ
Garcia, AL
TI Improving the Efficiency of a Multiscale Method for Rarefied Flows
SO 27TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS, 2010, PTS ONE AND
TWO
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 27th International Symposium on Rarefied Gas Dynamics
CY JUL 10-15, 2010
CL Asilomar Conf Grounds, Pacific Grove, CA
SP Air Force Off Sci Res, Natl Sci Fdn, Pennsylvania State Univ, Dept Aerospace Engn, Pennsylvania State Univ, Coll Engn, San Jose State Univ Res Fdn, Spectral Sci, Inc, Amer Inst Aeronaut & Astronaut (AIAA), Pennsylvania State Univ, Conf & Inst, Outreach
HO Asilomar Conf Grounds
DE multiscale methods; direct simulation Monte Carlo; transition-regime
flows; Boltzmann
ID SMOOTH TRANSITION MODEL; GAS-KINETIC-THEORY; HYDRODYNAMICS; EQUATIONS
AB The coupled multiscale, multiphysics method, CM3, is a novel method for simulating transition-regime gas flows. The basic idea of the method is to incorporate physics from the small-scale molecular motions into the continuum framework of the Navier-Stokes equations. CM3 uses a Monte Carlo procedure to solve the Boltzmann equation at various instants in time and calculates the viscous stress tensor, t, and heat flux vector, q, from the molecular velocities. The computed t and q are then substituted into the Navier-Stokes equations and these equations are advanced forward in time using a finite-volume method. A difficulty in implementing multiscale methods of this type lies in initializing the velocity distribution functions used in the Monte Carlo solver at the beginning of each integration cycle. In this paper, we describe a method of particle velocity reinitialization that is significantly more efficient than using a standard velocity distribution function.
C1 [Kessler, D. A.; Oran, E. S.; Kaplan, C. R.] USN, Res Lab, Lab Computat Phys & Fluid Dynam, Stennis Space Ctr, MS 39529 USA.
RP Kessler, DA (reprint author), USN, Res Lab, Lab Computat Phys & Fluid Dynam, Stennis Space Ctr, MS 39529 USA.
NR 20
TC 0
Z9 0
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0889-0
J9 AIP CONF PROC
PY 2011
VL 1333
BP 266
EP 271
DI 10.1063/1.3562659
PG 6
WC Physics, Multidisciplinary
SC Physics
GA BXE34
UT WOS:000295855300039
ER
PT J
AU Moskowitz, IS
Cotae, P
Kang, MH
Safier, PN
AF Moskowitz, Ira S.
Cotae, Paul
Kang, Myong H.
Safier, Pedro N.
TI Capacity Approximations for a Deterministic MIMO Channel
SO ADVANCES IN ELECTRICAL AND COMPUTER ENGINEERING
LA English
DT Article
DE MIMO; transmitter optimization; channel capacity; Telatar conjecture;
water filling
AB In this paper, we derive closed form approximations for the capacity of a point-to-point, deterministic Gaussian MIMO communication channel. We focus on the behavior of the inverse eigenvalues of the Gram matrix associated with the gain matrix of the MIMO channel, by considering small variance and large power assumptions. We revisit the concept of deterministic MIMO capacity by pointing out that, under transmitter power constraint, the optimal transmit covariance matrix is not necessarily diagonal. We discuss the water filling algorithm for obtaining the optimal eigenvalues of the transmitter covariance matrix, and the water fill level in conjunction with the Karush-Kuhn-Tucker optimality conditions. We revise the Telatar conjecture for the capacity of a non-ergodic channel. We also provide deterministic examples and numerical simulations of the capacity, which are discussed in terms of our mathematical framework.
C1 [Moskowitz, Ira S.; Kang, Myong H.] USN, Res Lab, Ctr High Assurance Comp Syst, Washington, DC 20375 USA.
[Cotae, Paul] Univ Dist Columbia, Sch Engn & Appl Sci, Dept Elect & Comp Engn, Washington, DC 20008 USA.
[Safier, Pedro N.] S&J Solut LLC, Alexandria, VA 22314 USA.
RP Moskowitz, IS (reprint author), USN, Res Lab, Ctr High Assurance Comp Syst, Code 5540, Washington, DC 20375 USA.
EM moskowitz@itd.nrl.navy.mil; pcotae@udc.edu; mkang@itd.nrl.navy.mil;
Pedro-safier@sj-solutions.com
FU Office of Naval Research; University of the District of Columbia;
Department of Defense [W911NF-11-1-0144]
FX We thank Ruth Shulamite for her helpful comments. The second author
wishes to acknowledge the support of the Office of Naval Research 2010
ONR-ASEE Fellowship Summer Program, the University of the District of
Columbia 2010 Seed Grant Program and, Department of Defense Grant
W911NF-11-1-0144.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU UNIV SUCEAVA, FAC ELECTRICAL ENG
PI SUCEAVA
PA UNIV SUCEAVA, FAC ELECTRICAL ENG, STEFAN CEL MARE, UNIVERSITATII 13,
SUCEAVA, 720229, ROMANIA
SN 1582-7445
J9 ADV ELECTR COMPUT EN
JI Adv. Electr. Comput. Eng.
PY 2011
VL 11
IS 3
BP 3
EP 10
DI 10.4316/AECE.2011.03001
PG 8
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA 837IC
UT WOS:000296186700001
ER
PT J
AU Khot, LR
Miller, DR
Hiscox, AL
Salyani, M
Walker, TW
Farooq, M
AF Khot, Lav R.
Miller, David R.
Hiscox, April L.
Salyani, Masoud
Walker, Todd W.
Farooq, Muhammad
TI EXTRAPOLATION OF DROPLET CATCH MEASUREMENTS IN AEROSOL APPLICATION
TREATMENTS
SO ATOMIZATION AND SPRAYS
LA English
DT Article
DE elastic-backscatter LIDAR; LIDAR calibration; spray plume flux; droplet
dispersion; ULV sprayer
ID SPRAY DRIFT; AERIAL APPLICATIONS; DISPERSION; DEPOSITION
AB This paper reports on the methodology to quantify remote measurements of airborne aerosols using a light detection and ranging (LIDAR) system. Calibration with both active and passive sampling techniques was examined in a field study to define the use of calibrated LIDAR to quantify spray distribution across both space and time. The LIDAR was used to scan vertical cross-sections of the spray plume downwind from a moving sprayer path. Active and passive field samplers were used to obtain the spray collection at 10 m from the sprayer path (at 500 m from LIDAR). A thermal fogger and two ultra-low-volume aerosol applicators were used to produce aerosol spray in both day and nighttime applications. The results showed linear relationships between LIDAR backscatter from the spray plume and spray tracer collection on samplers (R(2) approximate to 0.77). A linear transfer function from the active samplers was applied to quantify spray plume flux across scanned cross-sections at various distances from the spray path. Plume-to-plume variability statistics were consistent with previous studies in turbulent atmospheres. Examples of LIDAR plume cross-section scans with extrapolated plume fluxing downwind are presented.
C1 [Khot, Lav R.; Salyani, Masoud] Univ Florida, IFAS, Ctr Citrus Res & Educ, Lake Alfred, FL 33850 USA.
[Miller, David R.] Univ Connecticut, Dept Nat Resources & Environm, Storrs, CT USA.
[Hiscox, April L.] Univ S Carolina, Dept Geog, Columbia, SC 29208 USA.
[Walker, Todd W.; Farooq, Muhammad] USN, Entomol Ctr Excellence, NAS Jax, Jacksonville, FL 32212 USA.
RP Salyani, M (reprint author), Univ Florida, IFAS, Ctr Citrus Res & Educ, Lake Alfred, FL 33850 USA.
EM msi@ufl.edu
RI Hiscox, April/C-2509-2008
OI Hiscox, April/0000-0001-8791-1488
FU U.S. Armed Forces Pest Management Board, Deployed War-Fighter Protection
(AFPMB/DWFP); University of Florida; WAS; University of Connecticut;
Storrs Agricultural Experiment Station; U.S. Navy Entomology Center of
Excellence; New Mexico State University Agricultural Experiment Station
FX This study was partially supported by a grant from the U.S. Armed Forces
Pest Management Board, Deployed War-Fighter Protection (AFPMB/DWFP)
research program. Support was also received from the University of
Florida, WAS, University of Connecticut, Storrs Agricultural Experiment
Station, U.S. Navy Entomology Center of Excellence, and the New Mexico
State University Agricultural Experiment Station. The authors
acknowledge the technical assistance of Roy Sweeb (UF/IFAS), Vincent
Smith and Cathy Robinson (NECE), Junming Wang and Mark Pacheco (NMSU),
and David Ganucci (UConn).
NR 18
TC 8
Z9 8
U1 0
U2 4
PU BEGELL HOUSE INC
PI REDDING
PA 50 CROSS HIGHWAY, REDDING, CT 06896 USA
SN 1044-5110
J9 ATOMIZATION SPRAY
JI Atom. Sprays
PY 2011
VL 21
IS 2
BP 149
EP 158
PG 10
WC Engineering, Multidisciplinary; Engineering, Chemical; Engineering,
Mechanical; Materials Science, Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA 837RA
UT WOS:000296219700005
ER
PT J
AU Carman, JC
McClean, JL
AF Carman, Jessie C.
McClean, Julie L.
TI Investigation of IPCC AR4 coupled climate model North Atlantic mode
water formation
SO OCEAN MODELLING
LA English
DT Article
DE Coupled climate models; Ocean heat budget; Heat flux; Mode water
formation; Ocean mixed layer; Subpolar Mode Water; Subtropical Mode
Water; North Atlantic
ID OCEAN CIRCULATION MODELS; MASS TRANSFORMATION RATES; BOUNDARY-LAYER; SST
ANOMALIES; MIXED-LAYER; SEA; VARIABILITY; FLUXES; PARAMETERIZATION;
SIMULATIONS
AB The formation of mode waters in the North Atlantic was examined in the suite of ocean models that comprise the World Climate Research Programme (WCRP) Coupled Model Intercomparison Project phase 3 (CMIP3). We constructed model climatologies for 1980-1999 from the 20th century simulations, and compared their mode water properties (temperature, salinity, formation rate, volume, turnover time, heat content) with data. In these models, we found biases in both the properties of the mode waters and their formation rates. For Subpolar Mode Water (SPMW), property biases principally involved salinity errors; additionally, some models form SPMW in an anomalous region west of the British Isles, shifting the source location of waters entering the overturning cell and altering the Nordic Seas' involvement in the Meridional Overturning Circulation. For Subtropical Mode Water (STMW), property biases involved both salinity and temperature errors, while positioning of heat and water fluxes relative to the Gulf Stream and northwest Sargasso Sea influenced STMW formation rate. Deficiencies in STMW formation rate and volume produced a turnover time of 1-2 years, approximately half of that observed; these variations in mode water bulk properties imply variation in ocean heat storage and advection, and hence deficiencies in all the models' abilities to adequately respond to changes in climatic forcing. Published by Elsevier Ltd.
C1 [Carman, Jessie C.] USN Acad, Annapolis, MD 21402 USA.
[McClean, Julie L.] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
[Carman, Jessie C.; McClean, Julie L.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Carman, JC (reprint author), USN Acad, 572C Holloway Rd, Annapolis, MD 21402 USA.
EM carman@usna.edu
FU Lawrence Livermore Military Academic Research Associate program; DOE
Office of Biological and Environmental Research; DOE Office of
Biological and Environmental Research through a sub-contract from
LLNL/PCMDI
FX We acknowledge the modelling groups, the Program for Climate Model
Diagnosis and Intercomparison (PCMDI) and the WCRP's Working Group on
Coupled Modelling (WGCM) for their roles in making available the WCRP
CMIP3 multi-model dataset. Support of this dataset is provided by the
Office of Science, US Department of Energy. NODC_WOA94 data were
provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their
Web site at http://www.cdc.noaa.gov/. J.C.C.'s funding was provided by
the Lawrence Livermore Military Academic Research Associate program and
the DOE Office of Biological and Environmental Research. J.L.M. was
supported by the DOE Office of Biological and Environmental Research
through a sub-contract from LLNL/PCMDI to SIO. The authors greatly
appreciate the helpful comments of Lynne Talley (SIO), Peter Gleckler
(LLNL), Ivana Cerovecki (SIO), and Detelina Ivanova (LLNL) as well as
the reviewers and the Editor for their comments and suggestions, which
greatly improved the quality of this work. Young-Oh Kwon (WHOI) provided
measures of the STMW overturn and heat content from data sources. Frank
Bryan (NCAR) provided the water mass transformation code. The authors
additionally thank Peter Braccio for his help with the generation of the
final figures.
NR 67
TC 5
Z9 5
U1 0
U2 1
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1463-5003
EI 1463-5011
J9 OCEAN MODEL
JI Ocean Model.
PY 2011
VL 40
IS 1
BP 14
EP 34
DI 10.1016/j.ocemod.2011.07.001
PG 21
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 836RN
UT WOS:000296128900002
ER
PT S
AU Buckley, M
Vaidyanathan, R
Mayol-Cuevas, W
AF Buckley, Martin
Vaidyanathan, Ravi
Mayol-Cuevas, Walterio
BE Olive, M
Solomonides, T
TI Sensor Suites For Assistive Arm Prosthetics
SO 2011 24TH INTERNATIONAL SYMPOSIUM ON COMPUTER-BASED MEDICAL SYSTEMS
(CBMS)
SE IEEE International Symposium on Computer-Based Medical Systems
LA English
DT Proceedings Paper
CT 24th International Symposium on Computer-Based Medical Systems (CBMS)
CY JUN 27-30, 2011
CL Univ W England, Bristol, ENGLAND
SP IEEE, IEEE Engn Med & Biol Soc (EMBS), British Comp Soc, Bristol Branch, ACM, IFIP
HO Univ W England
DE Prosthesis; Hand Eye Co-ordination; Virtual Environment; Gaze Tracking;
Tongue Control; Assistive Device; Rehabilitation; Kinect
AB This paper introduces a sensor suite framework for the partial automation of prosthetic arm control allowing high level control with a reduction of cognitive burden placed upon the user. Automation aims to replicate the hand eye co-ordination through the synergy of a virtual 7DOF arm prosthesis together with the development of a gaze tracking system. The interactions between elements of the suite are detailed and a selection of sensors implemented to control a simple simulation. Use of the novel tongue control system is used to provide discrete input to the system. Initial tests are made of of the system together with a users ability to learn to use the system with promising user feedback on ease of interaction and potential for reduced cognitive burden.
C1 [Buckley, Martin] Univ Bristol, Bristol Robot Lab, Frenchay Campus, Bristol BS16 1QD, Avon, England.
[Buckley, Martin] Univ West England, Bristol BS16 1QD, Avon, England.
[Vaidyanathan, Ravi] Imperial Coll London, Dept Mech Engn, London SW7 2AZ, England.
[Vaidyanathan, Ravi] US Navy, Postgrad Sch, Dept Syst Engn, Monterey, CA 93940 USA.
[Mayol-Cuevas, Walterio] Univ Bristol, Dept Comp Sci, Bristol BS8 1UB, Avon, England.
RP Buckley, M (reprint author), Univ Bristol, Bristol Robot Lab, Frenchay Campus, Bristol BS16 1QD, Avon, England.
EM memsb@bristol.ac.uk; rxv@case.edu; wmayol@cs.bris.ac.uk
FU UK Engineering and Physical Sciences Research Council (EPSRC)
FX This research was supported by the UK Engineering and Physical Sciences
Research Council (EPSRC), grant
NR 11
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2372-9198
BN 978-1-4577-1190-9
J9 COMP MED SY
PY 2011
PG 6
WC Computer Science, Information Systems; Computer Science,
Interdisciplinary Applications
SC Computer Science
GA BWZ98
UT WOS:000295472700068
ER
PT J
AU Laws, K
Vesecky, J
Paduan, J
AF Laws, Kenneth
Vesecky, John
Paduan, Jeffrey
GP IEEE
TI Monitoring Coastal Vessels for Environmental Applications: Application
of Kalman Filtering
SO 2011 IEEE/OES/CWTM TENTH WORKING CONFERENCE ON CURRENT, WAVES AND
TURBULENCE MEASUREMENT (CWTM)
LA English
DT Proceedings Paper
CT IEEE/OES/CWTM 10th Working Conference on Current, Waves and Turbulence
Measurement (CWTM)
CY MAR 20-23, 2011
CL Monterey, CA
SP Inst Elect Elect Engn (IEEE), IEEE Ocean Engn Soc (OES), Current, Waves & Turbulence Measurement Comm (CWTMC)
DE HF radar; ship monitoring; marine domain awareness; Kalman filtering
ID SURFACE-WAVE RADAR; SURVEILLANCE; SHIPS
AB Maritime domain awareness is important for coastal nations in terms of applications to coastal conservancy, security, fishery and stewardship of their exclusive economic zones (EEZs). Maritime situational awareness involves knowing the location, speed and bearing of ships and boats in the EEZ. HF radar is a useful tool in providing ship information in real time. It is especially effective when combined with information from ship-borne AIS beacons. Our previously developed HF radar and AIS ship detection models estimate signal to noise ratio (SNR) as a function of range, including ducted propagation for the AIS radio signals. However, ship detection is hampered by false targets related to wave echoes, interference and the high variability of HF echoes from ships. This is due in part to the aspect and frequency dependence of ship radar cross-section and to the presence of clutter bands at known Doppler shifts from both the ground and ocean surfaces. Distinguishing ship echoes from false alarm echoes is significantly aided by identifying radar targets with ship-like behavior. Thus, tracking ships using their HF radar echoes becomes an important means for effectively monitoring the presence of ships in the coastal ocean. We demonstrate the application of Kalman filtering to the ship-tracking problem with examples using data from the COCMP HF radar network along the California coast. As with other radar tracking problems, the Kalman approach proves effective in this application as well.
C1 [Laws, Kenneth; Vesecky, John] Univ Calif Santa Cruz, Dept Elect Engn, Santa Cruz, CA 95064 USA.
[Paduan, Jeffrey] US Navy, Postgrad Sch, Oceanog Dept, Monterey, CA 93943 USA.
RP Laws, K (reprint author), Univ Calif Santa Cruz, Dept Elect Engn, Santa Cruz, CA 95064 USA.
EM kip@soe.ucsc.edu; vesecky@soe.ucsc.edu; paduan@nps.navy.mil
NR 18
TC 0
Z9 0
U1 2
U2 7
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4577-0022-4
PY 2011
BP 38
EP 45
PG 8
WC Engineering, Electrical & Electronic
SC Engineering
GA BXB44
UT WOS:000295584600007
ER
PT J
AU Laws, KE
Vesecky, JF
Paduan, JD
AF Laws, Kenneth E.
Vesecky, John F.
Paduan, Jeffrey D.
GP IEEE
TI Error assessment of HF radar-based ocean current measurements: an error
model based on sub-period measurement variance
SO 2011 IEEE/OES/CWTM TENTH WORKING CONFERENCE ON CURRENT, WAVES AND
TURBULENCE MEASUREMENT (CWTM)
LA English
DT Proceedings Paper
CT IEEE/OES/CWTM 10th Working Conference on Current, Waves and Turbulence
Measurement (CWTM)
CY MAR 20-23, 2011
CL Monterey, CA
SP Inst Elect Elect Engn (IEEE), IEEE Ocean Engn Soc (OES), Current, Waves & Turbulence Measurement Comm (CWTMC)
DE High frequency radar; HF radar; ocean currents; current measurement;
errors
AB Data from CODAR-type ocean current sensing radar systems are used here to evaluate the performance of an error indicator provided as part of the available radar data. Investigations are based on data from pairs of radar systems with over-water baselines. Approximately year-long time series are used. The radar data are the typical hourly radial measurements provided by CODAR systems. These measurements are actually the median (or mean) of anywhere between 2 and 7 sub-hourly measurements collected by the radar system. The error indicator under examination is based on the standard deviation (std) of the sub-hourly radials, divided by the square root of the number of sub-hourly radials. These values are recorded in the hourly data files produced by recent versions of the CODAR data processing software. Examination of the model demonstrates a positive correlation between the model and the measured baseline difference std for all baseline pairs examined. The predictive capability of the error model is demonstrated by presenting its use as a data discriminator and by examination of time series of sliding boxcar samples of radar data. Baseline difference std for data rejected by a threshold based on the error model is shown to be significantly higher than for the data retained. The results presented here demonstrate potential to improve assessment of the HF radar current measurement uncertainty. Such improvement has potential to benefit all applications of HF radar data, including for example, Lagrangian particle tracking and surface current assimilation into numerical models.
C1 [Laws, Kenneth E.; Vesecky, John F.] Univ Calif Santa Cruz, Baskin Sch Engn, Santa Cruz, CA 95064 USA.
[Paduan, Jeffrey D.] US Navy, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
RP Laws, KE (reprint author), Univ Calif Santa Cruz, Baskin Sch Engn, Santa Cruz, CA 95064 USA.
EM kip@soe.ucsc.edu; paduan@nps.edu
FU National Oceanic and Atmospheric Administration
FX This work was sponsored by the National Oceanic and Atmospheric
Administration
NR 17
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4577-0022-4
PY 2011
BP 69
EP 75
PG 7
WC Engineering, Electrical & Electronic
SC Engineering
GA BXB44
UT WOS:000295584600012
ER
PT J
AU Woods, S
Hou, W
Goode, W
Jarosz, E
Weidemann, A
AF Woods, S.
Hou, W.
Goode, W.
Jarosz, E.
Weidemann, A.
GP IEEE
TI Measurements of turbulence for quantifying the impact of turbulence on
underwater imaging
SO 2011 IEEE/OES/CWTM TENTH WORKING CONFERENCE ON CURRENT, WAVES AND
TURBULENCE MEASUREMENT (CWTM)
LA English
DT Proceedings Paper
CT IEEE/OES/CWTM 10th Working Conference on Current, Waves and Turbulence
Measurement (CWTM)
CY MAR 20-23, 2011
CL Monterey, CA
SP Inst Elect Elect Engn (IEEE), IEEE Ocean Engn Soc (OES), Current, Waves & Turbulence Measurement Comm (CWTMC)
DE turbulence; underwater imaging; dissipation rate; microstructure;
acoustic doppler velocimeter
ID OCEANIC TURBULENCE; LIGHT-SCATTERING
AB It has long been acknowledged that turbulence affects propagation of light in the ocean. Physically, this is because turbulent inhomogeneities of the flow are associated with fluctuations in temperature and salinity. Variations in these passive scalars alter the water density, inducing variations in the refractive index, which result in near-forward scattering from turbulent inhomogeneities. In applications such as underwater imaging, the near-forward scattering from turbulence becomes a limiting factor over longer ranges and under conditions of stronger turbulence. The magnitude of this degrading effect depends upon the underwater environment, and can rapidly degrade the quality of underwater imaging under certain conditions. Overcoming this degradation through enhancement of imaging systems and post processing is important for such applications as diving, navigation, robotics, communication and target and mine detection and identification. To investigate the impact of turbulence upon underwater imaging and to compare with our previously developed model, quantified observation of the image degradation concurrent with characterization of the turbulent flow is necessary, spanning a variety of turbulent strengths. Therefore, we present field measurements of turbulence from the Skaneateles Optical Turbulence Exercise (SOTEX, July 2010), during which images of a target were collected over a 5 m path length at various depths in the water column, concurrent with profiles of the turbulent strength, optical properties, temperature, and conductivity. Turbulence was characterized by the turbulent kinetic energy dissipation (TKED) and thermal dissipation (TD) rates, which were obtained in close proximity using both a Rockland Scientific Vertical Microstructure Profiler (VMP) and a Nortek Vector velocimeter in combination with a PME CT sensor. While the two instrumental setups demonstrate reasonable agreement, some irregularities highlight the difficulties of accurately quantifying the desired parameters, which are likely associated with the spatial and temporal variability of the turbulence field. Supplementary measurements with the Vector/CT in a controlled laboratory convective tank will shed additional light on the quantitative relationship between image degradation and turbulence strength.
C1 [Woods, S.; Hou, W.; Goode, W.; Jarosz, E.; Weidemann, A.] USN, Res Lab, Ocean Sci Branch, Stennis Space Ctr, MS 39529 USA.
RP Woods, S (reprint author), USN, Res Lab, Ocean Sci Branch, Stennis Space Ctr, MS 39529 USA.
NR 12
TC 1
Z9 1
U1 0
U2 5
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4577-0022-4
PY 2011
BP 179
EP 183
PG 5
WC Engineering, Electrical & Electronic
SC Engineering
GA BXB44
UT WOS:000295584600028
ER
PT S
AU Gorzkowski, EP
Pan, MJ
Bender, BA
AF Gorzkowski, E. P.
Pan, M. -J.
Bender, B. A.
GP IEEE
TI Prototype Capacitor Produced by Freeze Tape-Casting
SO 2011 INTERNATIONAL SYMPOSIUM ON APPLICATIONS OF FERROELECTRICS
(ISAF/PFM) AND 2011 INTERNATIONAL SYMPOSIUM ON PIEZORESPONSE FORCE
MICROSCOPY AND NANOSCALE PHENOMENA IN POLAR MATERIALS
SE IEEE International Symposium on Applications of Ferroelectrics
LA English
DT Proceedings Paper
CT Joint Conference on IEEE International Symposium on Applications of
Ferroelectrics (ISAF/PFM)/ International Symposium on Piezoresponse
Force Microscopy and Nanoscale Phenomena in Polar Materials
CY JUL 24-27, 2011
CL Vancouver, CANADA
SP IEEE
DE Freeze casting; capacitor; composites
ID SUBLIMABLE VEHICLES; CERAMICS; COMPOSITES
AB In previous research freeze casting was used to construct ceramic-polymer composites in which the two phases are arranged in an electrically parallel configuration. By doing so, the composites exhibit dielectric constant (K) up to two orders of magnitude higher than that of composites with ceramic particles randomly dispersed in a polymer matrix. This technique has been successful with both an aqueous and camphene based ceramic slurry that is frozen uni-directionally to form a template such that ceramic aggregates are aligned in the temperature gradient direction. This technique has also been modified to process the slurry at room temperature using a tape caster. This alleviates the need for liquid nitrogen and a freeze-dryer. Transitioning the directional freezing technique to use a tape caster was successful and 20 vol.% BaTiO3 X7R ceramic plates were produced from camphene based tapes fired at 1300 degrees C for 2hrs. A 10 layer prototype capacitor was produced with a capacitance of 1.4 nF (K similar to 490) and low loss. This work shows that it is viable to scale the freezing technology up for future high K composite capacitor production.
C1 [Gorzkowski, E. P.; Pan, M. -J.; Bender, B. A.] USN, Res Lab, Washington, DC 20375 USA.
RP Gorzkowski, EP (reprint author), USN, Res Lab, Code 6351, Washington, DC 20375 USA.
EM gorzkows@anvil.nrl.navy.mil
NR 7
TC 0
Z9 0
U1 0
U2 13
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1099-4734
BN 978-1-4577-1161-9
J9 IEEE INT FERRO
PY 2011
PG 3
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BWZ36
UT WOS:000295404500072
ER
PT S
AU Pan, MJ
Gorzkowski, E
McAllister, K
AF Pan, Ming-Jen
Gorzkowski, Edward
McAllister, Kelly
GP IOP
TI Dielectric properties of polyhedral oligomeric silsesquioxane
(POSS)-based nanocomposites at 77k
SO 3RD INTERNATIONAL CONGRESS ON CERAMICS (ICC3): HYBRID AND
NANO-STRUCTURED MATERIALS
SE IOP Conference Series-Materials Science and Engineering
LA English
DT Proceedings Paper
CT 3rd International Congress on Ceramics (ICC)/23rd Fall Meeting of the
Ceramic-Society-of-Japan/20th Iketani Conference
CY NOV 14-18, 2010
CL Osaka, JAPAN
SP Ceram Soc Japan (CerSJ), Iketani Sci & Technol Fdn
AB The goal of this study is to develop dielectric nanocomposites for high energy density applications at liquid nitrogen temperature by utilizing a unique nano-material polyhedral oligomeric silsesquioxanes (POSS). A POSS molecule is consisted of a silica cage core with 8 silicon and 12 oxygen atoms and organic functional groups attached to the corners of the cage. In this study, we utilize POSS for the fabrication of nanocomposites both as a silica nanoparticle filler to enhance the breakdown strength and as a surfactant for effective dispersion of high permittivity ceramic nanoparticles in a polymer matrix. The matrix materials selected for the study are polyvinylidene fluoride (PVDF) and poly(methyl methacrylate) (PMMA). The ceramic nanoparticles are barium strontium titanate (BST 50/50) and strontium titanate. The dielectric properties of the solution-cast nanocomposites films were correlated to the composition and processing conditions. We determined that the addition of POSS did not provide enhanced dielectric performance in PVDF- and PMMA-based materials at either room temperature or 77K. In addition, we found that the dielectric breakdown strength of PMMA is lower at 77K than at room temperature, contradicting literature data.
C1 [Pan, Ming-Jen; Gorzkowski, Edward; McAllister, Kelly] USN, Res Lab, Multifunct Mat Branch, Code 6350, Washington, DC 20375 USA.
RP Pan, MJ (reprint author), USN, Res Lab, Multifunct Mat Branch, Code 6350, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM pan@anvil.nrl.navy.mil
NR 7
TC 2
Z9 2
U1 2
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1757-8981
J9 IOP CONF SER-MAT SCI
PY 2011
VL 18
AR 082006
DI 10.1088/1757-899X/18/8/082006
PG 4
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA BXD43
UT WOS:000295800200006
ER
PT J
AU Choi, WH
Kim, SI
Keum, MS
Han, W
Ko, H
Han, DK
AF Choi, Woo-Hyun
Kim, Seung-Il
Keum, Min-Seok
Han, Wang
Ko, Hanseok
Han, David K.
GP IEEE
TI Acoustic and Visual Signal Based Context Awareness System for Mobile
Application
SO IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS (ICCE 2011)
LA English
DT Proceedings Paper
CT IEEE International Conference on Consumer Electronics (ICCE 2011)
CY JAN 09-12, 2011
CL Las Vegas, NV
SP IEEE
AB In this paper, an acoustic and visual signal based context awareness system is proposed for a mobile application. The proposed system senses and determines, in real time, user contextual information, such as where the user is or what the user does, by processing signals from the microphone and the camera embedded in the mobile device. An initial implementation of the algorithms into a smart phone demonstrated effectiveness of the proposed system.
C1 [Choi, Woo-Hyun; Kim, Seung-Il; Keum, Min-Seok; Han, Wang; Ko, Hanseok] Korea Univ, Sch Elect Engn, Seoul, South Korea.
[Han, David K.] Off Naval Res, Arlington, VA USA.
[Ko, Hanseok] Korea Univ, Sch Elect Engn, Seoul 136713, South Korea.
RP Choi, WH (reprint author), Korea Univ, Sch Elect Engn, Seoul, South Korea.
FU Seoul RBD
FX This research was supported by Seoul R&BD.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-8712-7
PY 2011
BP 627
EP +
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BWW05
UT WOS:000295128300314
ER
PT S
AU Prokes, SM
Glembocki, OJ
Cleveland, E
Qi, H
AF Prokes, S. M.
Glembocki, O. J.
Cleveland, Erin
Qi, Hua
BE Kobayashi, NP
Talin, AA
Islam, MS
TI Growth of ZnO nanowires on retroreflector microspheres and the resulting
light channeling and plasmonic properties
SO NANOEPITAXY: MATERIALS AND DEVICES III
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Nanoepitaxy - Materials and Devices III
CY AUG 24-25, 2011
CL San Diego, CA
SP SPIE
AB We have investigated the growth of ZnO nanowires on curved BaTiO3 retroreflector beads, as well as growth of ZnO nanowires on flat substrates. Results indicate that the growth of ZnO aligned nanowire arrays occurs farther away from the Zn source in the retroreflectors, while the results are opposite for the flat Si substrates. In the case of the ZnO nanowires on flat Si, the nanowires formed in nearly aligned arrays are short and significantly thicker, suggesting that the growth occurs both longitudinally and laterally in this process, which is not the case for the growth on the retroreflector beads. The SERS response of the nanowire arrays on the retroreflectors has been compared to random nanowires on flat Si substrates, and results show that the signal strength is 29 times greater in the case of the wires grown on the retroreflectors. Since one would only expect a factor of 4 enhancement due to the light reflecting properties of the retroreflector, it is believed that the enhancement in the SERS signal is due to light channeling by the aligned nanowire arrays.
C1 [Prokes, S. M.; Glembocki, O. J.; Cleveland, Erin; Qi, Hua] USN, Res Lab, Washington, DC 20375 USA.
RP Prokes, SM (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 4
TC 0
Z9 0
U1 1
U2 6
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-716-2
J9 PROC SPIE
PY 2011
VL 8106
AR 81060L
DI 10.1117/12.899412
PG 10
WC Nanoscience & Nanotechnology; Optics; Physics, Applied
SC Science & Technology - Other Topics; Optics; Physics
GA BXD01
UT WOS:000295777800008
ER
PT S
AU Alves, F
Karamitros, A
Grbovic, D
Kearney, B
Karunasiri, G
AF Alves, Fabio
Karamitros, Apostolos
Grbovic, Dragoslav
Kearney, Brian
Karunasiri, Gamani
BE Razeghi, M
PereLaperne, N
Everitt, HO
Zavada, JM
Manzur, T
TI Highly absorbing nano-scale metal films for terahertz
SO TERAHERTZ EMITTERS, RECEIVERS, AND APPLICATIONS II
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Terahertz Emitters, Receivers, and Applications II
CY AUG 21, 2011
CL San Diego, CA
SP SPIE
DE thin films; terahertz; sensors; metal films
ID QUANTUM CASCADE LASER
AB Our work aims to identify nano-scale metal films with enhanced absorption between 1 to 10 THz for use in thermal imagers operating in this spectral band. Absorption measurements of chromium and nickel films with different thicknesses (8 - 30 nm) revealed absorption as high as 40% (Cr) and 27% (Ni) between 3 and 9 THz. Further analysis showed that it is possible to optimize absorption by controlling conductivity of metal films by patterning them to reduce fill factor. This design flexibility allows tailoring of the absorbing layer to reduce residual stress of membranes used in microbolmeter and bi-material thermal sensors.
C1 [Alves, Fabio; Karamitros, Apostolos; Grbovic, Dragoslav; Kearney, Brian; Karunasiri, Gamani] USN, Dept Phys, Postgrad Sch, Monterey, CA 93943 USA.
RP Alves, F (reprint author), USN, Dept Phys, Postgrad Sch, Monterey, CA 93943 USA.
NR 11
TC 0
Z9 0
U1 1
U2 5
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-729-2
J9 PROC SPIE
PY 2011
VL 8119
AR 81190K
DI 10.1117/12.894088
PG 7
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BXB30
UT WOS:000295580400013
ER
PT S
AU Freeman, W
Karunasiri, G
AF Freeman, Will
Karunasiri, Gamani
BE Razeghi, M
PereLaperne, N
Everitt, HO
Zavada, JM
Manzur, T
TI Temperature effects in terahertz step well quantum cascade structures
with diagonal optical transitions
SO TERAHERTZ EMITTERS, RECEIVERS, AND APPLICATIONS II
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Terahertz Emitters, Receivers, and Applications II
CY AUG 21, 2011
CL San Diego, CA
SP SPIE
DE THz; quantum cascade; step well; diagonal optical transition; lattice
temperature; optical gain spectra; electron transport; density matrix;
coherence
ID LASERS; SEMICONDUCTORS; SUPERLATTICE; TRANSPORT
AB Temperature effects in terahertz (THz) step well quantum cascade (QC) structures are investigated. Step well QC structures with diagonal optical transitions that use fast intrawell electron-longitudinal optical (LO) phonon scattering for depopulation are considered. A density matrix method is used to model the electron transport coherence and is incorporated into the Monte Carlo simulations of these structures. A phenomenological dephasing time is also included. The influence of the lattice temperature on the population inversion is modeled and the effects due to gain spectral broadening are also considered. Optical gain greater than typical waveguide resonator thresholds are estimated out to T similar to 200 K.
C1 [Freeman, Will] USN, Div Phys, Air Warfare Ctr, China Lake, CA 93555 USA.
RP Freeman, W (reprint author), USN, Div Phys, Air Warfare Ctr, China Lake, CA 93555 USA.
NR 31
TC 2
Z9 2
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-729-2
J9 PROC SPIE
PY 2011
VL 8119
AR 81190A
DI 10.1117/12.894223
PG 7
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BXB30
UT WOS:000295580400006
ER
PT J
AU Martins, JV
Marshak, A
Remer, LA
Rosenfeld, D
Kaufman, YJ
Fernandez-Borda, R
Koren, I
Correia, AL
Zubko, V
Artaxo, P
AF Martins, J. V.
Marshak, A.
Remer, L. A.
Rosenfeld, D.
Kaufman, Y. J.
Fernandez-Borda, R.
Koren, I.
Correia, A. L.
Zubko, V.
Artaxo, P.
TI Remote sensing the vertical profile of cloud droplet effective radius,
thermodynamic phase, and temperature
SO ATMOSPHERIC CHEMISTRY AND PHYSICS
LA English
DT Article
ID DEEP CONVECTIVE CLOUDS; SOLAR-RADIATION MEASUREMENTS; EFFECTIVE PARTICLE
RADIUS; SUPERCOOLED LIQUID WATER; OPTICAL-THICKNESS; MICROWAVE
RADIOMETER; POLLUTION AEROSOL; PHOTON TRANSPORT; CUMULUS CLOUDS;
AIR-POLLUTION
AB Cloud-aerosol interaction is a key issue in the climate system, affecting the water cycle, the weather, and the total energy balance including the spatial and temporal distribution of latent heat release. Information on the vertical distribution of cloud droplet microphysics and thermodynamic phase as a function of temperature or height, can be correlated with details of the aerosol field to provide insight on how these particles are affecting cloud properties and their consequences to cloud lifetime, precipitation, water cycle, and general energy balance. Unfortunately, today's experimental methods still lack the observational tools that can characterize the true evolution of the cloud microphysical, spatial and temporal structure in the cloud droplet scale, and then link these characteristics to environmental factors and properties of the cloud condensation nuclei.
Here we propose and demonstrate a new experimental approach (the cloud scanner instrument) that provides the microphysical information missed in current experiments and remote sensing options. Cloud scanner measurements can be performed from aircraft, ground, or satellite by scanning the side of the clouds from the base to the top, providing us with the unique opportunity of obtaining snapshots of the cloud droplet microphysical and thermodynamic states as a function of height and brightness temperature in clouds at several development stages. The brightness temperature profile of the cloud side can be directly associated with the thermodynamic phase of the droplets to provide information on the glaciation temperature as a function of different ambient conditions, aerosol concentration, and type. An aircraft prototype of the cloud scanner was built and flew in a field campaign in Brazil.
The CLAIM-3D (3-Dimensional Cloud Aerosol Interaction Mission) satellite concept proposed here combines several techniques to simultaneously measure the vertical profile of cloud microphysics, thermodynamic phase, brightness temperature, and aerosol amount and type in the neighborhood of the clouds. The wide wavelength range, and the use of multi-angle polarization measurements proposed for this mission allow us to estimate the availability and characteristics of aerosol particles acting as cloud condensation nuclei, and their effects on the cloud microphysical structure. These results can provide unprecedented details on the response of cloud droplet microphysics to natural and anthropogenic aerosols in the size scale where the interaction really happens.
C1 [Martins, J. V.] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21228 USA.
[Martins, J. V.] Univ Maryland Baltimore Cty, Joint Ctr Earth Syst Technol, Baltimore, MD 21228 USA.
[Martins, J. V.; Marshak, A.; Remer, L. A.; Kaufman, Y. J.; Fernandez-Borda, R.] NASA, Goddard Space Flight Ctr, Atmospheres Lab, Greenbelt, MD 20771 USA.
[Rosenfeld, D.] Hebrew Univ Jerusalem, Inst Earth Sci, IL-91905 Jerusalem, Israel.
[Fernandez-Borda, R.] Univ Maryland Baltimore Cty, Joint Ctr Earth Syst Technol, Baltimore, MD 21228 USA.
[Koren, I.] Weizmann Inst Sci, Dept Environm Sci, IL-76100 Rehovot, Israel.
[Zubko, V.] USN Observ, Washington, DC 20392 USA.
[Correia, A. L.; Artaxo, P.] Univ Sao Paulo, Inst Phys, BR-05508 Sao Paulo, Brazil.
RP Martins, JV (reprint author), Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21228 USA.
EM martins@umbc.edu
RI Koren, Ilan/K-1417-2012; Marshak, Alexander/D-5671-2012; Rosenfeld,
Daniel/F-6077-2016; Artaxo, Paulo/E-8874-2010
OI Koren, Ilan/0000-0001-6759-6265; Rosenfeld, Daniel/0000-0002-0784-7656;
Artaxo, Paulo/0000-0001-7754-3036
FU NASA Goddard Space Flight Center New Opportunities Office; CPTEC/INPE;
CNPq; FAPESP
FX This work was partially supported by NASA Goddard Space Flight Center
New Opportunities Office. We thank Keith Gendreau, Juan Carlos Ceballos,
Karla Longo and Gilberto K. Nishioka for the essential help in
collecting the aircraft data, and the CPTEC/INPE support on weather
forecast during the CLAIM-2005 campaign in Brazil. P. Artaxo
acknowledges financial support from CNPq and FAPESP. We also thank
Graham Feingold, Anthony Davis, Bernhard Mayer, Steve Platnick and Zev
Levin for the numerous stimulating discussions on this subject.
NR 80
TC 14
Z9 14
U1 3
U2 23
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 1680-7316
J9 ATMOS CHEM PHYS
JI Atmos. Chem. Phys.
PY 2011
VL 11
IS 18
BP 9485
EP 9501
DI 10.5194/acp-11-9485-2011
PG 17
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 826QL
UT WOS:000295368700004
ER
PT J
AU Kilic, E
Stanica, P
AF Kilic, Emrah
Stanica, Pantelimon
TI FACTORIZATIONS AND REPRESENTATIONS OF BINARY POLYNOMIAL RECURRENCES BY
MATRIX METHODS
SO ROCKY MOUNTAIN JOURNAL OF MATHEMATICS
LA English
DT Article
DE Second order recurrences; factorization; Chebyshev polynomials;
tridiagonal matrix; matrix methods
ID DISCRETE COSINE
AB In this paper we derive factorizations and representations of a polynomial analogue of an arbitrary binary sequence by matrix methods. It generalizes various results on Fibonacci, Lucas, Chebyshev and Morgan-Voyce polynomials.
C1 [Kilic, Emrah] Econ & Technol Univ, Dept Math, TR-06560 Ankara, Turkey.
[Stanica, Pantelimon] USN, Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
RP Kilic, E (reprint author), Econ & Technol Univ, Dept Math, TR-06560 Ankara, Turkey.
EM ekilic@etu.edu.tr; pstanica@nps.edu
NR 11
TC 2
Z9 2
U1 0
U2 1
PU ROCKY MT MATH CONSORTIUM
PI TEMPE
PA ARIZ STATE UNIV, DEPT MATH, TEMPE, AZ 85287-1904 USA
SN 0035-7596
J9 ROCKY MT J MATH
JI Rocky Mt. J. Math.
PY 2011
VL 41
IS 4
BP 1247
EP 1264
DI 10.1216/RMJ-2011-41-4-1247
PG 18
WC Mathematics
SC Mathematics
GA 830ZN
UT WOS:000295698500013
ER
PT J
AU Hafez, MM
AF Hafez, Mohammed M.
BE Moghadam, A
Fishman, B
TI Takfir and violence against Muslims
SO FAULT LINES IN GLOBAL JIHAD: ORGANIZATIONAL, STRATEGIC AND IDEOLOGICAL
FISSURES
SE Political Violence
LA English
DT Article; Book Chapter
C1 USN, Postgrad Sch, Monterey, CA 93943 USA.
RP Hafez, MM (reprint author), USN, Postgrad Sch, Monterey, CA 93943 USA.
NR 0
TC 1
Z9 1
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-203-81492-5
J9 POLITICAL VIOLENCE
PY 2011
BP 25
EP 46
PG 22
WC Political Science; Religion
SC Government & Law; Religion
GA BVA02
UT WOS:000290852900002
ER
PT B
AU Sanford, S
AF Sanford, Scott
BE Moghadam, A
Fishman, B
TI Fault lines in cyberspace
SO FAULT LINES IN GLOBAL JIHAD: ORGANIZATIONAL, STRATEGIC AND IDEOLOGICAL
FISSURES
SE Political Violence
LA English
DT Article; Book Chapter
C1 [Sanford, Scott] Jihadica Com, Brea, CA 92821 USA.
[Sanford, Scott] USN, Arlington, VA USA.
RP Sanford, S (reprint author), Jihadica Com, Brea, CA 92821 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-203-81492-5
J9 POLITICAL VIOLENCE
PY 2011
BP 220
EP 231
PG 12
WC Political Science; Religion
SC Government & Law; Religion
GA BVA02
UT WOS:000290852900011
ER
PT J
AU Davis, ZS
AF Davis, Zachary S.
BE Davis, ZS
TI CONCLUSION: LESSONS LEARNED AND UNLEARNED
SO INDIA-PAKISTAN MILITARY STANDOFF: CRISIS AND ESCALATION IN SOUTH ASIA
SE Initiatives in Strategic Studies-Issues and Policies
LA English
DT Editorial Material; Book Chapter
C1 [Davis, Zachary S.] Lawrence Livermore Natl Lab, Ctr Global Secur Res, Livermore, CA 94550 USA.
[Davis, Zachary S.] Naval Postgrad Sch, Monterey, CA USA.
RP Davis, ZS (reprint author), Lawrence Livermore Natl Lab, Ctr Global Secur Res, Livermore, CA 94550 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU PALGRAVE
PI BASINGSTOKE
PA HOUNDMILLS, BASINGSTOKE RG21 6XS, ENGLAND
BN 978-0-23011-876-8
J9 INITIAT STRATEG STUD
PY 2011
BP 229
EP 236
D2 10.1057/9780230118768
PG 8
WC International Relations; Political Science
SC International Relations; Government & Law
GA BWU33
UT WOS:000294866200010
ER
PT B
AU Stubbs, BB
Truver, SC
AF Stubbs, Bruce B.
Truver, Scott C.
BE Tan, ATH
TI Towards a New Understanding of Maritime Power
SO POLITICS OF MARITIME POWER: A SURVEY, 1ST EDITION
LA English
DT Article; Book Chapter
C1 [Truver, Scott C.] USN Acad, Annapolis, MD 21402 USA.
RP Stubbs, BB (reprint author), Sci Applicat Int Corp, Mclean, VA 22102 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-1-85743-404-0
PY 2011
BP 3
EP 28
PG 26
WC International Relations; Political Science
SC International Relations; Government & Law
GA BWE21
UT WOS:000293732600002
ER
PT B
AU Tangredi, SJ
AF Tangredi, Sam J.
BE Tan, ATH
TI Navies and Expeditionary Warfare
SO POLITICS OF MARITIME POWER: A SURVEY, 1ST EDITION
LA English
DT Article; Book Chapter
C1 [Tangredi, Sam J.] USN, Int Program Off, Stennis Space Ctr, MS 39529 USA.
RP Tangredi, SJ (reprint author), USN, Int Program Off, Stennis Space Ctr, MS 39529 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-1-85743-404-0
PY 2011
BP 80
EP 94
PG 15
WC International Relations; Political Science
SC International Relations; Government & Law
GA BWE21
UT WOS:000293732600006
ER
PT J
AU Moran, D
AF Moran, Daniel
BE Tan, ATH
TI The Maritime Governance System
SO POLITICS OF MARITIME POWER: A SURVEY, 1ST EDITION
LA English
DT Article; Book Chapter
C1 [Moran, Daniel] USN, Dept Natl Secur Affairs, Postgrad Sch, Monterey, CA 93943 USA.
RP Moran, D (reprint author), USN, Dept Natl Secur Affairs, Postgrad Sch, Monterey, CA 93943 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-1-85743-404-0
PY 2011
BP 115
EP 130
PG 16
WC International Relations; Political Science
SC International Relations; Government & Law
GA BWE21
UT WOS:000293732600008
ER
PT B
AU Tangredi, SJ
AF Tangredi, Sam J.
BE Tan, ATH
TI The Future of Maritime Power
SO POLITICS OF MARITIME POWER: A SURVEY, 1ST EDITION
LA English
DT Article; Book Chapter
C1 [Tangredi, Sam J.] USN, Int Program Off, Stennis Space Ctr, MS 39529 USA.
RP Tangredi, SJ (reprint author), USN, Int Program Off, Stennis Space Ctr, MS 39529 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-1-85743-404-0
PY 2011
BP 131
EP 146
PG 16
WC International Relations; Political Science
SC International Relations; Government & Law
GA BWE21
UT WOS:000293732600009
ER
PT J
AU Huntley, WL
AF Huntley, Wade L.
BE Sadeh, E
TI Moderate Space Powers
SO POLITICS OF SPACE: A SURVEY, 1ST EDITION
LA English
DT Article; Book Chapter
C1 [Huntley, Wade L.] USN, Postgrad Sch, Natl Secur Affairs Dept, Monterey, CA USA.
[Huntley, Wade L.] Univ British Columbia, Simons Ctr Disarmament & Nonproliferat Res, Vancouver, BC V5Z 1M9, Canada.
[Huntley, Wade L.] Hiroshima Peace Inst, Hiroshima, Japan.
[Huntley, Wade L.] Nautilus Inst, Global Peace & Secur Program, Berkeley, CA USA.
RP Huntley, WL (reprint author), USN, Postgrad Sch, Natl Secur Affairs Dept, Monterey, CA USA.
NR 63
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-1-85743-419-4
PY 2011
BP 77
EP 103
PG 27
WC International Relations; Political Science
SC International Relations; Government & Law
GA BWE18
UT WOS:000293731000005
ER
PT S
AU Daniel, B
Wilson, ML
Edelberg, J
Jensen, M
Johnson, T
Anderson, S
AF Daniel, Brian
Wilson, Michael L.
Edelberg, Jason
Jensen, Mark
Johnson, Troy
Anderson, Scott
BE Henry, DJ
Cheng, BT
VonBerg, DCL
Young, DL
TI Autonomous collection of dynamically-cued multi-sensor imagery
SO AIRBORNE INTELLIGENCE, SURVEILLANCE, RECONNAISSANCE (ISR) SYSTEMS AND
APPLICATIONS VIII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Airborne Intelligence, Surveillance, Reconnaissance (ISR)
Systems and Applications VIII
CY APR 27-28, 2011
CL Orlando, FL
SP SPIE
DE UAV; sensor; collaboration; MWIR; visible; autonomous; networked
AB The availability of imagery simultaneously collected from sensors of disparate modalities enhances an image analyst's situational awareness and expands the overall detection capability to a larger array of target classes. Dynamic cooperation between sensors is increasingly important for the collection of coincident data from multiple sensors either on the same or on different platforms suitable for UAV deployment. Of particular interest is autonomous collaboration between wide area survey detection, high-resolution inspection, and RF sensors that span large segments of the electromagnetic spectrum. The Naval Research Laboratory (NRL) in conjunction with the Space Dynamics Laboratory (SDL) is building sensors with such networked communications capability and is conducting field tests to demonstrate the feasibility of collaborative sensor data collection and exploitation. Example survey / detection sensors include: NuSAR (NRL Unmanned SAR), a UAV compatible synthetic aperture radar system; microHSI, an NRL developed lightweight hyper-spectral imager; RASAR (Real-time Autonomous SAR), a lightweight podded synthetic aperture radar; and N-WAPSS-16 (Nighttime Wide-Area Persistent Surveillance Sensor-16Mpix), a MWIR large array gimbaled system. From these sensors, detected target cues are automatically sent to the NRL/SDL developed EyePod, a high-resolution, narrow FOV EO/IR sensor, for target inspection. In addition to this cooperative data collection, EyePod's real-time, autonomous target tracking capabilities will be demonstrated. Preliminary results and target analysis will be presented.
C1 [Daniel, Brian; Wilson, Michael L.; Edelberg, Jason] USN, Res Lab, Washington, DC 20375 USA.
RP Daniel, B (reprint author), USN, Res Lab, 4555 Overlook Ave, Washington, DC 20375 USA.
NR 6
TC 1
Z9 1
U1 1
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-594-6
J9 PROC SPIE
PY 2011
VL 8020
AR 80200A
DI 10.1117/12.882926
PG 9
WC Engineering, Aerospace; Optics
SC Engineering; Optics
GA BWU69
UT WOS:000294911100010
ER
PT B
AU Forsberg, JA
Brown, TS
Potter, BK
AF Forsberg, Jonathan Agner
Brown, Trevor S.
Potter, Benjamin K.
BE Owens, BD
Belmont, PJ
TI BASIC SCIENCE OF WAR WOUNDS
SO COMBAT ORTHOPEDIC SURGERY: LESSONS LEARNED IN IRAQ AND AFGHANISTAN
LA English
DT Article; Book Chapter
ID INTERFERON-GAMMA-PRODUCTION; SYME ANKLE DISARTICULATION;
COLONY-STIMULATING FACTOR; TOTAL HIP-ARTHROPLASTY;
TUMOR-NECROSIS-FACTOR; MATRIX METALLOPROTEINASES; GROWTH-FACTOR;
HETEROTOPIC OSSIFICATION; INDUCIBLE PROTEIN-10; ORTHOPEDIC INJURIES
C1 [Forsberg, Jonathan Agner] USN, Operat & Undersea Med Directorate, Med Res Ctr, Silver Spring, MD USA.
[Forsberg, Jonathan Agner] Walter Reed Natl Mil Med Ctr, Integrated Dept Orthopaed Surg, Washington, DC USA.
[Forsberg, Jonathan Agner; Potter, Benjamin K.] Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD 20814 USA.
[Brown, Trevor S.] USN, Regenerat Med Dept, Med Res Ctr, Silver Spring, MD USA.
[Potter, Benjamin K.] Walter Reed Natl Mil Med Ctr, Integrated Dept Orthopaed & Rehabil, Amputee Patient Care Program, Washington, DC USA.
RP Forsberg, JA (reprint author), USN, Operat & Undersea Med Directorate, Med Res Ctr, Silver Spring, MD USA.
NR 105
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-965-1
PY 2011
BP 77
EP 84
PG 8
WC Orthopedics; Surgery
SC Orthopedics; Surgery
GA BTZ12
UT WOS:000288484200009
ER
PT B
AU Potter, BK
Forsberg, JA
AF Potter, Benjamin K.
Forsberg, Jonathan Agner
BE Owens, BD
Belmont, PJ
TI HETEROTOPIC OSSIFICATION
SO COMBAT ORTHOPEDIC SURGERY: LESSONS LEARNED IN IRAQ AND AFGHANISTAN
LA English
DT Article; Book Chapter
ID TOTAL HIP-ARTHROPLASTY; SPINAL-CORD-INJURY; NONSTEROIDAL
ANTIINFLAMMATORY DRUGS; TRAUMATIC BRAIN-INJURY; DISTAL HUMERAL
FRACTURES; ECTOPIC-BONE-FORMATION; ACETABULAR FRACTURES;
RADIATION-THERAPY; RANDOMIZED-TRIAL; EARLY EXCISION
C1 [Potter, Benjamin K.] Walter Reed Natl Mil Med Ctr, Amputee Patient Care Program, Integrated Dept Orthopaed & Rehabil, Washington, DC USA.
[Potter, Benjamin K.; Forsberg, Jonathan Agner] Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD 20814 USA.
[Forsberg, Jonathan Agner] USN, Operat & Undersea Med Directorate, Med Res Ctr, Silver Spring, MD USA.
RP Potter, BK (reprint author), Walter Reed Natl Mil Med Ctr, Amputee Patient Care Program, Integrated Dept Orthopaed & Rehabil, Washington, DC USA.
NR 111
TC 0
Z9 0
U1 0
U2 1
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-965-1
PY 2011
BP 85
EP 92
PG 8
WC Orthopedics; Surgery
SC Orthopedics; Surgery
GA BTZ12
UT WOS:000288484200010
ER
PT B
AU Carney, J
Covey, DC
AF Carney, Joseph
Covey, D. C.
BE Owens, BD
Belmont, PJ
TI EXTERNAL FIXATION PRINCIPLES
SO COMBAT ORTHOPEDIC SURGERY: LESSONS LEARNED IN IRAQ AND AFGHANISTAN
LA English
DT Article; Book Chapter
ID MECHANICAL PERFORMANCE; FRACTURES
C1 [Carney, Joseph; Covey, D. C.] USN, Dept Orthopaed Surg, San Diego Med Ctr, San Diego, CA 92152 USA.
RP Carney, J (reprint author), USN, Dept Orthopaed Surg, San Diego Med Ctr, San Diego, CA 92152 USA.
NR 20
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-965-1
PY 2011
BP 129
EP 133
PG 5
WC Orthopedics; Surgery
SC Orthopedics; Surgery
GA BTZ12
UT WOS:000288484200015
ER
PT B
AU Hofmeister, EP
Hanna, KH
Kroonen, LT
AF Hofmeister, Eric P.
Hanna, Kathryn H.
Kroonen, Leo T.
BE Owens, BD
Belmont, PJ
TI UPPER EXTREMITY NERVE INJURIES
SO COMBAT ORTHOPEDIC SURGERY: LESSONS LEARNED IN IRAQ AND AFGHANISTAN
LA English
DT Article; Book Chapter
ID OPERATION IRAQI FREEDOM; ULNAR NERVE; COMPLETE LESIONS; BRACHIAL-PLEXUS;
SCIATIC-NERVE; REPAIR; RECONSTRUCTION; CONDUITS; REGENERATION; AVULSION
C1 [Hofmeister, Eric P.; Hanna, Kathryn H.; Kroonen, Leo T.] USN, Dept Orthopaed Surg, San Diego Med Ctr, San Diego, CA 92152 USA.
[Hofmeister, Eric P.; Kroonen, Leo T.] Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD 20814 USA.
RP Hofmeister, EP (reprint author), USN, Dept Orthopaed Surg, San Diego Med Ctr, San Diego, CA 92152 USA.
NR 38
TC 1
Z9 1
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-965-1
PY 2011
BP 137
EP 146
PG 10
WC Orthopedics; Surgery
SC Orthopedics; Surgery
GA BTZ12
UT WOS:000288484200016
ER
PT B
AU Kumar, AR
Lim, AA
Tintle, S
Bradley, JP
AF Kumar, Anand R.
Lim, Alan A.
Tintle, Scott
Bradley, James P.
BE Owens, BD
Belmont, PJ
TI UPPER EXTREMITY COVERAGE: MANAGEMENT OF COMBAT-RELATED SOFT TISSUE
INJURY OF THE UPPER EXTREMITY
SO COMBAT ORTHOPEDIC SURGERY: LESSONS LEARNED IN IRAQ AND AFGHANISTAN
LA English
DT Article; Book Chapter
ID OPERATION-IRAQI-FREEDOM; ANTEROLATERAL THIGH FLAP; VACUUM-ASSISTED
CLOSURE; EXTERNAL FIXATION; TIBIAL FRACTURES; ILIAC CREST; VIETNAM-WAR;
FOLLOW-UP; RECONSTRUCTION; TRAUMA
C1 [Kumar, Anand R.] Walter Reed Natl Mil Med Ctr, Dept Plast & Reconstruct Surg, Bethesda, MD USA.
[Lim, Alan A.] Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD 20814 USA.
[Lim, Alan A.] USN, Med Ctr Portsmouth, Portsmouth, VA USA.
[Tintle, Scott] Walter Reed Natl Mil Med Ctr, Dept Orthopaed & Rehabil, Washington, DC USA.
[Bradley, James P.] Univ Calif Los Angeles, Dept Surg, Div Plast & Reconstruct Surg, Los Angeles, CA 90024 USA.
RP Kumar, AR (reprint author), Walter Reed Natl Mil Med Ctr, Dept Plast & Reconstruct Surg, Bethesda, MD USA.
NR 50
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-965-1
PY 2011
BP 157
EP 168
PG 12
WC Orthopedics; Surgery
SC Orthopedics; Surgery
GA BTZ12
UT WOS:000288484200018
ER
PT B
AU Potter, BK
Tintle, S
Forsberg, JA
AF Potter, Benjamin K.
Tintle, Scott
Forsberg, Jonathan Agner
BE Owens, BD
Belmont, PJ
TI COMBAT-RELATED LOWER EXTREMITY AMPUTATIONS
SO COMBAT ORTHOPEDIC SURGERY: LESSONS LEARNED IN IRAQ AND AFGHANISTAN
LA English
DT Article; Book Chapter
ID BELOW-KNEE AMPUTATION; OPERATION ENDURING FREEDOM; LOWER-LIMB
AMPUTATIONS; QUALITY-OF-LIFE; TERM-FOLLOW-UP; SYMES AMPUTATION;
TRANSTIBIAL AMPUTATIONS; TRAUMATIC AMPUTATIONS; VIETNAM-WAR; FREE FLAPS
C1 [Potter, Benjamin K.] Walter Reed Natl Mil Med Ctr, Amputee Patient Care Program, Integrated Dept Orthopaed & Rehabil, Washington, DC USA.
[Potter, Benjamin K.; Forsberg, Jonathan Agner] Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD 20814 USA.
[Tintle, Scott] Walter Reed Natl Mil Med Ctr, Dept Orthopaed & Rehabil, Washington, DC USA.
[Forsberg, Jonathan Agner] USN, Operat & Undersea Med Directorate, Med Res Ctr, Silver Spring, MD USA.
[Forsberg, Jonathan Agner] Walter Reed Natl Mil Med Ctr, Integrated Dept Orthopaed Surg, Washington, DC USA.
RP Potter, BK (reprint author), Walter Reed Natl Mil Med Ctr, Amputee Patient Care Program, Integrated Dept Orthopaed & Rehabil, Washington, DC USA.
NR 117
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-965-1
PY 2011
BP 205
EP 219
PG 15
WC Orthopedics; Surgery
SC Orthopedics; Surgery
GA BTZ12
UT WOS:000288484200022
ER
PT B
AU Kumar, AR
Lim, AA
Tintle, S
Bradley, JP
AF Kumar, Anand R.
Lim, Alan A.
Tintle, Scott
Bradley, James P.
BE Owens, BD
Belmont, PJ
TI LOWER EXTREMITY COVERAGE: MANAGEMENT OF COMBAT-RELATED SOFT TISSUE
INJURY OF THE LOWER EXTREMITY
SO COMBAT ORTHOPEDIC SURGERY: LESSONS LEARNED IN IRAQ AND AFGHANISTAN
LA English
DT Article; Book Chapter
ID OPERATION-IRAQI-FREEDOM; ANTEROLATERAL THIGH FLAP; OPEN TIBIAL
FRACTURES; VACUUM-ASSISTED CLOSURE; FOOT RECONSTRUCTION; WAR WOUNDS;
FOLLOW-UP; TRAUMA; EXPERIENCE; MUSCLE
C1 [Kumar, Anand R.] Walter Reed Natl Mil Med Ctr, Dept Plast & Reconstruct Surg, Bethesda, MD USA.
[Lim, Alan A.] Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD 20814 USA.
[Lim, Alan A.] USN, Med Ctr Portsmouth, Portsmouth, VA USA.
[Tintle, Scott] Walter Reed Natl Mil Med Ctr, Dept Orthopaed & Rehabil, Bethesda, MD USA.
[Bradley, James P.] Univ Calif Los Angeles, Dept Surg, Div Plast & Reconstruct Surg, Los Angeles, CA 90024 USA.
RP Kumar, AR (reprint author), Walter Reed Natl Mil Med Ctr, Dept Plast & Reconstruct Surg, Bethesda, MD USA.
NR 63
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-965-1
PY 2011
BP 253
EP 267
PG 15
WC Orthopedics; Surgery
SC Orthopedics; Surgery
GA BTZ12
UT WOS:000288484200025
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Myth: Entrepreneurs are visionaries
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 2
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 2
EP 9
PG 8
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100002
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Effectual Entrepreneurship Introduction
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Editorial Material; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP IX
EP +
PG 7
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100001
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI I don't have a good idea
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 10
EP 19
PG 10
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100003
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Myth: Entrepreneurs are risk takers
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 1
U2 2
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 20
EP 29
PG 10
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100004
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI I don't have enough money
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 30
EP 35
PG 6
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100005
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Myth: Entrepreneurs are extraordinary forecasters
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 36
EP 43
PG 8
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100006
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI I don't know how to take the plunge
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 44
EP 50
PG 7
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100007
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Myth: Entrepreneurs are not like the rest of us
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 1
U2 2
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 51
EP 60
PG 10
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100008
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI I'm human: I'm afraid of failing
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 61
EP 70
PG 10
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100009
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI The bird-in-hand principle: Start with what you have
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 72
EP 82
PG 11
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100010
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Worldmaking: Understand transformation
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 83
EP 95
PG 13
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100011
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI The affordable loss principle: Risk little, fail cheap
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 96
EP 104
PG 9
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100012
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Financing: Bootstrap the venture
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 105
EP 112
PG 8
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100013
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI The crazy quilt principle: Form partnerships
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 113
EP 124
PG 12
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100014
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Ownership and control: Manage investors
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 125
EP 139
PG 15
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100015
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI The lemonade principle: Leverage surprise
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 140
EP 150
PG 11
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100016
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Business plans and business models: Make pitches
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 151
EP 162
PG 12
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100017
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Venture identity: Build brand
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 163
EP 172
PG 10
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100018
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI The pilot-on-the-plane principle: Apply non-predictive control
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 173
EP 186
PG 14
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100019
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI When the venture grows up
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 189
EP 199
PG 11
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100020
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Entrepreneurship as a technology for social change
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Article; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 200
EP 207
PG 8
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100021
ER
PT J
AU Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, AV
AF Read, Stuart
Sarasvathy, Saras
Dew, Nick
Wiltbank, Robert
Ohlsson, Anne-Valerie
BA Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
BF Read, S
Sarasvathy, S
Dew, N
Wiltbank, R
Ohlsson, A
TI Effectual Entrepreneurship Conclusion
SO EFFECTUAL ENTREPRENEURSHIP
LA English
DT Editorial Material; Book Chapter
C1 [Sarasvathy, Saras] Univ Virginia, Darden Sch, Charlottesville, VA 22903 USA.
[Dew, Nick] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Stennis Space Ctr, MS 39529 USA.
[Wiltbank, Robert] Willamette Univ, Atkinson Sch Management, Salem, OR 97301 USA.
RI OHLSSON, Anne-Valerie/H-1127-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
BN 978-0-20383-690-3
PY 2011
BP 208
EP 209
PG 2
WC Business; Management
SC Business & Economics
GA BUO94
UT WOS:000289946100022
ER
PT B
AU Barlow, BT
Harris, EB
AF Barlow, Brian T.
Harris, Eric B.
BE Rihn, JA
Harris, EB
TI PHYSICAL EXAMINATION OF THE THORACOLUMBAR SPINE
SO MUSCULOSKELETAL EXAMINATION OF THE SPINE: MAKING THE COMPLEX SIMPLE
LA English
DT Article; Book Chapter
ID SCOLIOSIS
C1 [Barlow, Brian T.] USN, Med Ctr, San Diego, CA 92152 USA.
[Harris, Eric B.] USN, San Diego Med Ctr, Multidisciplinary Spine Ctr, San Diego, CA 92152 USA.
[Harris, Eric B.] Thomas Jefferson Univ, Sch Med, Philadelphia, PA USA.
RP Barlow, BT (reprint author), USN, Med Ctr, San Diego, CA 92152 USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-996-5
PY 2011
BP 18
EP 41
PG 24
WC Orthopedics
SC Orthopedics
GA BWS05
UT WOS:000294697300003
ER
PT B
AU Ponton, RP
Harris, EB
AF Ponton, Ryan P.
Harris, Eric B.
BE Rihn, JA
Harris, EB
TI CERVICAL TRAUMA UPPER CERVICAL SPINE
SO MUSCULOSKELETAL EXAMINATION OF THE SPINE: MAKING THE COMPLEX SIMPLE
LA English
DT Article; Book Chapter
ID MULTIPLE IMAGING TECHNIQUES; ANTERIOR SCREW FIXATION; ODONTOID
FRACTURES; ATLANTOOCCIPITAL DISLOCATION; NONOPERATIVE MANAGEMENT;
EMERGENCY-DEPARTMENT; EASTERN ASSOCIATION; COMPUTED-TOMOGRAPHY; PRACTICE
GUIDELINES; PLAIN RADIOGRAPHY
C1 [Ponton, Ryan P.] USN, Dept Orthoped, Med Ctr, San Diego, CA 92152 USA.
[Harris, Eric B.] USN, Multidisciplinary Spine Ctr, San Diego Med Ctr, San Diego, CA 92152 USA.
[Harris, Eric B.] Thomas Jefferson Univ, Sch Med, Philadelphia, PA USA.
RP Ponton, RP (reprint author), USN, Dept Orthoped, Med Ctr, San Diego, CA 92152 USA.
NR 33
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-996-5
PY 2011
BP 98
EP 124
PG 27
WC Orthopedics
SC Orthopedics
GA BWS05
UT WOS:000294697300008
ER
PT B
AU Hanna, KH
Harris, EB
AF Hanna, Kathryn H.
Harris, Eric B.
BE Rihn, JA
Harris, EB
TI SCHEUERMANN KYPHOSIS
SO MUSCULOSKELETAL EXAMINATION OF THE SPINE: MAKING THE COMPLEX SIMPLE
LA English
DT Article; Book Chapter
ID MILWAUKEE-BRACE TREATMENT; JUVENILE KYPHOSIS; FOLLOW-UP; DISEASE;
INSTRUMENTATION; COMPRESSION
C1 [Hanna, Kathryn H.] USN, Dept Orthopaed Surg, Med Ctr, San Diego, CA 92152 USA.
[Harris, Eric B.] USN, Multidisciplinary Spine Ctr, San Diego Med Ctr, San Diego, CA 92152 USA.
[Harris, Eric B.] Thomas Jefferson Univ, Sch Med, Philadelphia, PA USA.
RP Hanna, KH (reprint author), USN, Dept Orthopaed Surg, Med Ctr, San Diego, CA 92152 USA.
NR 21
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-996-5
PY 2011
BP 261
EP 275
PG 15
WC Orthopedics
SC Orthopedics
GA BWS05
UT WOS:000294697300016
ER
PT B
AU Saldua, NS
Harrop, JS
AF Saldua, Nelson S.
Harrop, James S.
BE Rihn, JA
Harris, EB
TI PRIMARY BONE TUMORS OF THE SPINE
SO MUSCULOSKELETAL EXAMINATION OF THE SPINE: MAKING THE COMPLEX SIMPLE
LA English
DT Article; Book Chapter
ID GIANT-CELL TUMORS; ARTERIAL EMBOLIZATION; OSTEOID OSTEOMA;
MUSCULOSKELETAL SARCOMA; VERTEBRAL TUMORS; LUMBAR SPINE; CYST;
OSTEOBLASTOMA; MANAGEMENT; SYSTEM
C1 [Saldua, Nelson S.] USN, Dept Orthoped Surg, Med Ctr, San Diego, CA 92152 USA.
[Harrop, James S.] Thomas Jefferson Univ, Jefferson Med Coll, Dept Neurol, Philadelphia, PA 19107 USA.
[Harrop, James S.] Thomas Jefferson Univ, Jefferson Med Coll, Dept Orthoped Surg, Philadelphia, PA 19107 USA.
RP Saldua, NS (reprint author), USN, Dept Orthoped Surg, Med Ctr, San Diego, CA 92152 USA.
NR 31
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-996-5
PY 2011
BP 292
EP 312
PG 21
WC Orthopedics
SC Orthopedics
GA BWS05
UT WOS:000294697300018
ER
PT B
AU Cummings, JA
AF Cummings, James A.
BE Schiller, A
Brassington, GB
TI Ocean Data Quality Control
SO OPERATIONAL OCEANOGRAPHY IN THE 21ST CENTURY
LA English
DT Article; Book Chapter
ID SEA-SURFACE TEMPERATURE; DATA ASSIMILATION; RETRIEVALS; VALIDATION;
ACCURACY
AB Automated ocean data quality procedures are presented. The procedures are logically grouped into four stages of processing, which when taken together form a complete sensor-to-prediction quality control system. The main features of the different ocean observing systems assimilated by GODAE are presented along with sources and types of errors that can occur in the data. Specific quality control procedures are described that test for these errors as well as more general procedures that estimate the consistency of the data across observing systems. Performance of the external data checks in the U.S. Navy real-time ocean data quality system is described. Finally, the importance of real-time ocean data quality control as an observing system monitoring tool is emphasized, and some specific examples are given of new quality control techniques developed in numerical weather prediction that have direct applicability in ocean data assimilation and forecasting systems.
C1 USN, Div Oceanog, Res Lab, Monterey, CA 93943 USA.
RP Cummings, JA (reprint author), USN, Div Oceanog, Res Lab, Monterey, CA 93943 USA.
EM james.cummings@nrlmry.navy.mil
NR 16
TC 11
Z9 11
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
BN 978-94-007-0331-5
PY 2011
BP 91
EP 121
DI 10.1007/978-94-007-0332-2_4
D2 10.1007/978-94-007-0332-2
PG 31
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA BWL57
UT WOS:000294197300004
ER
PT B
AU Hurlburt, HE
Metzger, EJ
Richman, JG
Chassignet, EP
Drillet, Y
Hecht, MW
Le Galloudec, O
Shriver, JF
Xu, XB
Zamudio, L
AF Hurlburt, Harley E.
Metzger, E. Joseph
Richman, James G.
Chassignet, Eric P.
Drillet, Yann
Hecht, Matthew W.
Le Galloudec, Olivier
Shriver, Jay F.
Xu, Xiaobiao
Zamudio, Luis
BE Schiller, A
Brassington, GB
TI Dynamical Evaluation of Ocean Models Using the Gulf Stream as an Example
SO OPERATIONAL OCEANOGRAPHY IN THE 21ST CENTURY
LA English
DT Article; Book Chapter
ID WESTERN BOUNDARY CURRENT; NORTH-ATLANTIC CIRCULATION;
NUMERICAL-SIMULATION; GENERAL-CIRCULATION; DATA ASSIMILATION;
CAPE-HATTERAS; WIND STRESS; WORLD OCEAN; RESOLUTION; TRANSPORT
AB The Gulf Stream is the focus of an effort aimed at dynamical understanding and evaluation of current systems simulated by eddy-resolving Ocean General Circulation Models (OGCMs), including examples with and without data assimilation and results from four OGCMs (HYCOM, MICOM, NEMO, and POP), the first two including Lagrangian isopycnal coordinates in the vertical and the last two using fixed depths. The Gulf Stream has been challenging to simulate and understand. While different non-assimilative models have at times simulated a realistic Gulf Stream pathway, the simulations are very sensitive to small changes, such as subgrid-scale parameterizations and parameter values. Thus it is difficult to obtain consistent results and serious flaws are often simulated upstream and downstream of Gulf Stream separation from the coast at Cape Hatteras. In realistic simulations, steering by a key abyssal current and a Gulf Stream feedback mechanism constrain the latitude of the Gulf Stream near 68.5 degrees W. Additionally, the Gulf Stream follows a constant absolute vorticity (CAV) trajectory from Cape Hatteras to similar to 70 degrees W, but without the latitudinal constraint near 68.5 degrees W, the pathway typically develops a northern or southern bias. A shallow bias in the southward abyssal flow of the Atlantic Meridional Overturning Circulation (AMOC) creates a serious problem in many simulations because it results in abyssal currents along isobaths too shallow to feed into the key abyssal current or other abyssal currents that provide a similar pathway constraint. Pathways with a southern bias are driven by a combination of abyssal currents crossing under the Gulf Stream near the separation point and the increased opportunity for strong flow instabilities along the more southern route. The associated eddy-driven mean abyssal currents constrain the mean pathway to the east. Due to sloping topography, flow instabilities are inhibited along the more northern routes west of similar to 69 degrees W, especially for pathways with a northern bias. The northern bias occurs when the abyssal current steering constraint needed for a realistic pathway is missing or too weak and the simulation succumbs to the demands of linear dynamics for an overshoot pathway. Both the wind forcing and the upper ocean branch of the AMOC contribute to those demands. Simulations with a northern pathway bias were all forced by a wind product particularly conducive to that result and they have a strong or typical AMOC transport with a shallow bias in the southward flow. Simulations forced by the same wind product (or other wind products) that have a weak AMOC with a shallow bias in the southward limb exhibit Gulf Stream pathways with a southern bias. Data assimilation has a very positive impact on the model dynamics by increasing the strength of a previously weak AMOC and by increasing the depth range of the deep southward branch. The increased depth range of the southward branch generates more realistic abyssal currents along the continental slope. This result in combination with vortex stretching and compression generated by the data-assimilative approximation to meanders in the Gulf Stream and related eddies in the upper ocean yield a model response that simulates the Gulf Stream-relevant abyssal current features seen in historical in situ observations, including the key abyssal current near 68.5 degrees W, a current not observed in the assimilated data set or corresponding simulations without data assimilation.
In addition, the model maintains these abyssal currents in a mean of 48 14-day forecasts, butdoes not maintain the strength of the Gulf Stream east of the western boundary.
C1 [Hurlburt, Harley E.] USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
RP Hurlburt, HE (reprint author), USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
EM harley.hurlburt@nrlsse.navy.mil
NR 65
TC 7
Z9 7
U1 1
U2 9
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
BN 978-94-007-0331-5
PY 2011
BP 545
EP 609
DI 10.1007/978-94-007-0332-2_21
D2 10.1007/978-94-007-0332-2
PG 65
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA BWL57
UT WOS:000294197300021
ER
PT B
AU Provencher, MT
Hsu, AR
Ghodadra, NS
Romeo, AA
AF Provencher, Matthew T.
Hsu, Andrew R.
Ghodadra, Neil S.
Romeo, Anthony A.
BE DiGiacomo, G
Costantini, A
DeVita, A
DeGasperis, N
TI ILIAC-CREST GRAFT AND DISTAL TIBIA ALLOGRAFT PROCEDURE
SO SHOULDER INSTABILITY: ALTERNATIVE SURGICAL TECHNIQUES
LA English
DT Article; Book Chapter
ID ANTERIOR GLENOHUMERAL INSTABILITY; ANATOMICAL GLENOID RECONSTRUCTION;
SHOULDER INSTABILITY; BONE LOSS; BANKART; DISLOCATION; LATARJET;
DEFECTS; REPAIRS
C1 [Provencher, Matthew T.] USN, Dept Orthopaed Surg, San Diego Med Ctr, San Diego, CA 92152 USA.
[Hsu, Andrew R.; Ghodadra, Neil S.; Romeo, Anthony A.] Rush Univ, Med Ctr, Dept Orthopaed Surg, Chicago, IL 60612 USA.
RP Provencher, MT (reprint author), USN, Dept Orthopaed Surg, San Diego Med Ctr, San Diego, CA 92152 USA.
NR 24
TC 3
Z9 3
U1 0
U2 0
PU SPRINGER-VERLAG ITALIA
PI MILAN
PA MILAN, ITALY
BN 978-88-470-2034-4
PY 2011
BP 117
EP 146
PG 30
WC Orthopedics; Surgery
SC Orthopedics; Surgery
GA BWR86
UT WOS:000294692400006
ER
PT B
AU Hoffer, ME
Balaban, C
AF Hoffer, Michael E.
Balaban, Carey
BE Moller, AR
Langguth, B
DeRidder, D
Kleinjung, T
TI Traumatic Brain Injury and Blast Exposures: Auditory and Vestibular
Pathology
SO TEXTBOOK OF TINNITUS
LA English
DT Article; Book Chapter
DE Tinnitus; Traumatic brain injury; Tinnitus; Vestibular disorders;
Hearing loss
ID SUBARACHNOID HEMORRHAGE; TINNITUS; PRESSURE
C1 [Hoffer, Michael E.] USN, San Diego Med Ctr, Spatial Orientat Ctr, Dept Otolaryngol, San Diego, CA 92134 USA.
[Balaban, Carey] Univ Pittsburgh, Inst Eye & Ear, Dept Otolaryngol, Pittsburgh, PA 15213 USA.
RP Hoffer, ME (reprint author), USN, San Diego Med Ctr, Spatial Orientat Ctr, Dept Otolaryngol, 34800 Bob Wilson Dr, San Diego, CA 92134 USA.
EM Michael.hoffer@med.navy.mil; cbalaban@pitt.edu
OI Balaban, Carey/0000-0002-3570-3844
NR 17
TC 1
Z9 1
U1 1
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-60761-144-8
PY 2011
BP 517
EP 520
DI 10.1007/978-1-60761-145-5_67
PG 4
WC Otorhinolaryngology
SC Otorhinolaryngology
GA BSR36
UT WOS:000285539700067
ER
PT S
AU Cobb, JT
Principe, J
AF Cobb, J. Tory
Principe, Jose
BE Harmon, RS
Holloway, JH
Broach, JT
TI Seabed Segmentation in Synthetic Aperture Sonar Images
SO DETECTION AND SENSING OF MINES, EXPLOSIVE OBJECTS, AND OBSCURED TARGETS
XVI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Detection and Sensing of Mines, Explosive Objects, and
Obscured Targets XVI
CY APR 25-29, 2011
CL Orlando, FL
SP SPIE
DE Synthetic Aperture Sonar; Image Segmentation; K-Distribution; Parameter
Estimation; Autocorrelation Function
ID K-DISTRIBUTED CLUTTER; MRF MODEL; TEXTURES
AB A synthetic aperture sonar (SAS) image segmentation algorithm using features from a parameterized intensity image autocorrelation function (ACF) is presented. A modification over previous parameterized ACF models that better characterizes periodic or rippled seabed textures is presented and discussed. An unsupervised multiclass k-means segmentation algorithm is proposed and tested against a set of labeled SAS images. Segmentation results using the various models are compared against sand, rock, and rippled seabed environments.
C1 [Cobb, J. Tory] USN, Ctr Surface Warfare, Panama City, FL USA.
RP Cobb, JT (reprint author), USN, Ctr Surface Warfare, 110 Vernon Ave, Panama City, FL USA.
NR 18
TC 0
Z9 0
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-591-5
J9 PROC SPIE
PY 2011
VL 8017
AR 80170M
DI 10.1117/12.883048
PG 11
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BWS83
UT WOS:000294758600021
ER
PT S
AU Isaacs, JC
AF Isaacs, Jason C.
BE Harmon, RS
Holloway, JH
Broach, JT
TI Laplace-Beltrami Eigenfunctions for 3D Shape Matching
SO DETECTION AND SENSING OF MINES, EXPLOSIVE OBJECTS, AND OBSCURED TARGETS
XVI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Detection and Sensing of Mines, Explosive Objects, and
Obscured Targets XVI
CY APR 25-29, 2011
CL Orlando, FL
SP SPIE
DE 3D Shape analysis; Laplace-Beltrami; manifold learning
ID DIMENSIONALITY REDUCTION; EIGENMAPS
AB Assuming that a 2D surface is a representation of a manifold embedded in 3-space then metrics of the eigenfunctions of the diffusion maps of that manifold represent the shape of that manifold with invariance to rotation, scale, and translation. Diffusion maps is said to preserve the local proximity between data points by constructing a representation for the underlying manifold by an approximation of the Laplace-Beltrami operator acting on the graph of this surface. This work examines 3D shape clustering problems using metrics of the projections onto the natural and nodal sets of the Laplace-Betrami eigenfunctions for shape analysis of closed surfaces. Results demonstrate that the metrics allow for good class separation over multiple targets with noise.
C1 USN, Ctr Surface Warfare, Adv Signal Proc & ATR, Panama City, FL 32407 USA.
RP Isaacs, JC (reprint author), USN, Ctr Surface Warfare, Adv Signal Proc & ATR, X-13,110 Vernon Ave, Panama City, FL 32407 USA.
EM jason.c.isaacs1@navy.mil
NR 12
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-591-5
J9 PROC SPIE
PY 2011
VL 8017
AR 80170Q
DI 10.1117/12.885642
PG 10
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BWS83
UT WOS:000294758600025
ER
PT S
AU Isaacs, JC
AF Isaacs, Jason C.
BE Harmon, RS
Holloway, JH
Broach, JT
TI Optimal Frame Pursuit for Pattern Classification
SO DETECTION AND SENSING OF MINES, EXPLOSIVE OBJECTS, AND OBSCURED TARGETS
XVI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Detection and Sensing of Mines, Explosive Objects, and
Obscured Targets XVI
CY APR 25-29, 2011
CL Orlando, FL
SP SPIE
DE Over-complete basis; projection pursuit; basis pursuit; genetic
algorithms; cross-entropy
ID CROSS-ENTROPY METHOD; OPTIMIZATION
AB Frame methods, basis expansion methods, or kernel methods provide a higher-dimensional representation of a given dataset within a feature space for discrimination applications. Frame pursuit addresses the problem of searching for optimal frames to improve classification for pattern recognition applications. In this paper, the results of two stochastic optimization techniques applied to the optimal frame problem are presented. The cost function is a k-nearest-neighbor function. These techniques are tested here over six datasets. Empirical results demonstrate the utility of frame transformations for improving performance results in pattern recognition applications.
C1 USN, Ctr Surface Warfare, Adv Signal Proc & ATR, Panama City, FL 32407 USA.
RP Isaacs, JC (reprint author), USN, Ctr Surface Warfare, Adv Signal Proc & ATR, X-13,110 Vernon Ave, Panama City, FL 32407 USA.
NR 18
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-591-5
J9 PROC SPIE
PY 2011
VL 8017
AR 80170N
DI 10.1117/12.885641
PG 7
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BWS83
UT WOS:000294758600022
ER
PT S
AU Matthews, CA
Sternlicht, DD
AF Matthews, Cameron A.
Sternlicht, Daniel D.
BE Harmon, RS
Holloway, JH
Broach, JT
TI Seabed Change Detection in Challenging Environments
SO DETECTION AND SENSING OF MINES, EXPLOSIVE OBJECTS, AND OBSCURED TARGETS
XVI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Detection and Sensing of Mines, Explosive Objects, and
Obscured Targets XVI
CY APR 25-29, 2011
CL Orlando, FL
SP SPIE
AB Automatic Change Detection (ACD) compares new and stored terrain images for alerting to changes occurring over time. These techniques, long used in airborne radar, are just beginning to be applied to sidescan sonar. Under the right conditions ACD by image correlation-comparing multi-temporal image data at the pixel or parcel level-can be used to detect new objects on the seafloor. Synthetic aperture sonars (SAS)-coherent sensors that produce fine-scale, range-independent resolution seafloor images-are well suited for this approach; however, dynamic seabed environments can introduce "clutter" to the process. This paper explores an ACD method that uses salience mapping in a global-to-local analysis architecture. In this method, termed Temporally Invariant Saliency (TIS), variance ratios of median-filtered repeat-pass images are used to detect new objects, while deemphasizing modest environmental or radiometric-induced changes in the background. Successful tests with repeat-pass data from two SAS systems mounted on autonomous undersea vehicles (AUV) demonstrate the feasibility of the technique.
C1 [Matthews, Cameron A.; Sternlicht, Daniel D.] USN, Ctr Surface Warfare, Panama City Div, Panama City, FL 32407 USA.
RP Matthews, CA (reprint author), USN, Ctr Surface Warfare, Panama City Div, 110 Vernon Ave, Panama City, FL 32407 USA.
NR 8
TC 0
Z9 0
U1 2
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-591-5
J9 PROC SPIE
PY 2011
VL 8017
AR 80170P
DI 10.1117/12.881644
PG 6
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BWS83
UT WOS:000294758600024
ER
PT S
AU Miller, JB
AF Miller, Joel B.
BE Harmon, RS
Holloway, JH
Broach, JT
TI Nuclear Quadrupole Resonance Detection of Explosives: An Overview
SO DETECTION AND SENSING OF MINES, EXPLOSIVE OBJECTS, AND OBSCURED TARGETS
XVI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Detection and Sensing of Mines, Explosive Objects, and
Obscured Targets XVI
CY APR 25-29, 2011
CL Orlando, FL
SP SPIE
DE Nuclear Quadrupole Resonance; NQR; explosives; detection
ID CHEMICAL APPLICATIONS; MAGNETIC-RESONANCE; N-14 NQR; SPECTROSCOPY;
INTERFERENCE; LANDMINES
AB Nuclear Quadrupole Resonance (NQR) is a spectroscopic technique closely related to Nuclear Magnetic Resonance (NMR) and Magnetic Resonance Imaging (MRI). These techniques, and NQR in particular, induce signals from the material being interrogated that are very specific to the chemical and physical structure of the material, but are relatively insensitive to the physical form of the material. NQR explosives detection exploits this specificity to detect explosive materials, in contrast to other well known techniques that are designed to detect explosive devices. The past two decades have seen a large research and development effort in NQR explosives detection in the United States aimed at transportation security and military applications. Here, I will briefly describe the physical basis for NQR before discussing NQR developments over the past decade, with particular emphasis on landmine detection and the use of NQR in combating IED's. Potential future directions for NQR research and development are discussed.
C1 USN, Res Lab, Div Chem, Washington, DC 20375 USA.
RP Miller, JB (reprint author), USN, Res Lab, Div Chem, Code 6120,4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 21
TC 2
Z9 2
U1 1
U2 10
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-81948-591-5
J9 PROC SPIE
PY 2011
VL 8017
AR 801715
DI 10.1117/12.887213
PG 7
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BWS83
UT WOS:000294758600038
ER
EF