FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Yu, ZN
Fossum, E
Wang, DH
Tan, LS
AF Yu, Zhenning
Fossum, Eric
Wang, David H.
Tan, Loon-Seng
TI Alternative approach to an AB(2) monomer for hyperbranched poly(arylene
ether ketone imide)s
SO SYNTHETIC COMMUNICATIONS
LA English
DT Article
DE branched polymer; monomers; selectivity
ID PHOSPHINE OXIDE)S; AROMATIC-SUBSTITUTION; POLY(ETHER SULFONE)S;
POLYMERS; FUNCTIONALIZATION; COPOLYMERIZATION; REACTIVITY
AB An alternative approach to an AB(2) monomer, N-[3,5-bis(4-hydroxybenzoyl)benzene]-4-fluorophthalimde, 4, for hyperbranched poly(arylene ether ketone imide)s has been developed. The key steps were a para-position selective electrophilic aromatic substitution of fluorobenzene with 5-nitroisophthaloyl dichloride and a subsequent clean conversion of the aryl fluorides to phenol groups using potassium hydroxide as the nucleophile. The overall yield for the synthesis of 4 was 51.6%.
C1 [Yu, Zhenning] Wright State Univ, Dept Chem, Dayton, OH 45435 USA.
[Wang, David H.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Tan, Loon-Seng] USAF, Res Lab, Mfg Technol Directorate, Polymer Branch,Mat & Mfg Directorate,MLBP, Dayton, OH USA.
RP Fossum, E (reprint author), Wright State Univ, Dept Chem, 3640 Colonel Glenn Hwy, Dayton, OH 45435 USA.
EM eric.fossum@wright.edu
RI Yu, Zhenning/A-2011-2010; Wang, David/F-7492-2013; Tan,
Loon-Seng/F-6985-2012
OI Wang, David/0000-0001-6710-7265; Tan, Loon-Seng/0000-0002-2134-9290
NR 25
TC 6
Z9 6
U1 0
U2 6
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0039-7911
J9 SYNTHETIC COMMUN
JI Synth. Commun.
PY 2008
VL 38
IS 3
BP 419
EP 427
DI 10.1080/00397910701771157
PG 9
WC Chemistry, Organic
SC Chemistry
GA 260WX
UT WOS:000253042200013
ER
PT J
AU Belletire, JL
Bills, RA
Shackelford, SA
AF Belletire, John L.
Bills, Robert A.
Shackelford, Scott A.
TI Practical methylation procedure for (1H)-1,2,4-triazole
SO SYNTHETIC COMMUNICATIONS
LA English
DT Article
DE 1-methyl-1,2,4-triazole; regioselective alkylation; sequential
continuous extraction; short-path distillation; 1,2,4-triazole sodium
salt
ID ANTIFUNGAL AGENTS; 1-ALKYL-1,2,4-TRIAZOLES; AZOLES
AB Conversion of (1H)-1,2,4-triazole to its sodium salt with methanolic sodium methoxide is followed by reaction with iodomethane. A scalable approach that overcomes problems associated with water-soluble starting material and water-soluble product combined continuous extraction (chloroform/water) with a final short-path distillation under a controlled vacuum to obtain spectroscopically pure 1-methyl-1,2,4-triazole in 63% yield. Adaptation to microwave synthesis conditions, while providing a faster reaction time, offers no product yield or purification advantages over the conventional approach described. Conversions of this product to related derivatives such as 1,4-dimethyl-1,2,4-triazolium iodide and 1-methyl-1,2,4-triazolium hydrochloride are readily achieved.
C1 [Belletire, John L.] ERC Inc, USAF, Res Lab, Edwards AFB, CA USA.
[Bills, Robert A.; Shackelford, Scott A.] Air Force Res Lab, Propellants Branch, Space & Missile Propuls, Edwards AFB, CA USA.
RP Shackelford, SA (reprint author), USAF, Res Lab, Propellants Branch, 10 E Satrun Blvd,Bldg 8451, Edwards AFB, CA 93524 USA.
EM scott.shackelford@edwards.af.mil
NR 13
TC 8
Z9 8
U1 1
U2 6
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0039-7911
J9 SYNTHETIC COMMUN
JI Synth. Commun.
PY 2008
VL 38
IS 5
BP 738
EP 745
DI 10.1080/00397910701820319
PG 8
WC Chemistry, Organic
SC Chemistry
GA 265BT
UT WOS:000253334800009
ER
PT S
AU Lowry, HS
Breeden, MF
Crider, DH
Steely, SL
Nicholson, RA
Labello, JM
AF Lowry, H. S.
Breeden, M. F.
Crider, D. H.
Steely, S. L.
Nicholson, R. A.
Labello, J. M.
BE Murrer, RL
TI Technical issues in the development of scene-projection systems for
sensor calibration, characterization, and HWIL testing at AEDC
SO TECHNOLOGIES FOR SYNTHETIC ENVIRONMENTS: HARDWARE-IN-THE-LOOP TESTING
XIII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Technologies for Synthetic Environments -
Hardware-in-the-Loop Testing XIII
CY MAR 17-18, 2008
CL Orlando, FL
SP SPIE
DE space simulation; radiometric calibration and characterization; space
sensor testing; vacuum chamber
AB The characterization, calibration, and mission simulation testing of space-based, interceptor, and airborne sensors require a continual involvement in the development and evaluation of radiometric projection technologies. Recent efforts at the Arnold Engineering Development Center (AEDC) include hardware-in-the-loop (HWIL) testing with high-fidelity, complex scene projection technologies integrated into a low-cryovacuum (similar to 20 K) environment as well as improvements in the radiometric source calibration systems. The latest scene simulation and projection technologies are being investigated, technologies that can produce desired target temperatures and target-to-sensor ranges that will make it possible to evaluate sensor mission performance. These technologies include multiple-band source subsystems and special spectral tailoring methods, as well as comprehensive analysis and optical properties measurements of the components involved. This paper discusses the implementation of such techniques at AEDC.
C1 [Lowry, H. S.; Breeden, M. F.; Crider, D. H.; Steely, S. L.; Nicholson, R. A.; Labello, J. M.] Aeros Testing Alliance, Arnold Engn Dev Ctr, Arnold AFB, TN 37389 USA.
RP Lowry, HS (reprint author), Aeros Testing Alliance, Arnold Engn Dev Ctr, 1077 Ave Schriever, Arnold AFB, TN 37389 USA.
EM heard.lowry@arnold.af.mil
NR 7
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 978-0-8194-7133-8
J9 PROC SPIE
PY 2008
VL 6942
AR 69420M
DI 10.1117/12.776884
PG 12
WC Computer Science, Hardware & Architecture; Optics
SC Computer Science; Optics
GA BHW94
UT WOS:000257113800017
ER
PT J
AU Minchin, RE
Hammons, MI
Ahn, J
Choubane, B
AF Minchin, R. Edward, Jr.
Hammons, Michael I.
Ahn, Junyong
Choubane, Bouzid
TI Highway Construction Quality Index for Florida
SO TRANSPORTATION RESEARCH RECORD
LA English
DT Article
ID PAY FACTORS; PERFORMANCE; MODEL
AB The Florida Department of Transportation (FDOT) is developing strategies to improve the quality of transportation infrastructure while coping with changes in business models and reductions in agency personnel. Nationwide, policy is changing more quickly than ever, and every policy change reinforces the need for contractors who perform high-quality work. There have been several initiatives in the past to develop some kind of rational, objective system of rating the quality of highway construction projects. There have also been initiatives to utilize these ratings for substantial issues such as contractor qualification and bidding purposes, but not one state uses their quality ratings for anything more substantial than setting contractors' bidding ceilings. Some states do not use these ratings at all and some states do not even rate the quality of their projects. One of the chief complaints against current systems is their subjectivity. The construction quality index, developed through a grant from FDOT, is a rating of the quality of materials and workmanship on highway projects that, unlike current quality rating models used by state highway agencies, is totally objective. Under limited validation testing, the model assigned quality index values consistent with the owner's level of satisfaction with the project.
C1 [Ahn, Junyong] Univ Florida, Dept Civil & Coastal Engn, Gainesville, FL 32611 USA.
[Hammons, Michael I.] Appl Res Associates Inc, Tyndall AFB, FL 32403 USA.
[Choubane, Bouzid] Florida Dept Transportat, Gainesville, FL 32609 USA.
EM minch@ufl.edu
NR 16
TC 1
Z9 1
U1 0
U2 3
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0361-1981
J9 TRANSP RES RECORD
JI Transp. Res. Record
PY 2008
IS 2081
BP 29
EP 37
DI 10.3141/2081-03
PG 9
WC Engineering, Civil; Transportation; Transportation Science & Technology
SC Engineering; Transportation
GA 395AB
UT WOS:000262493200003
ER
PT J
AU Miyoshi, K
Jeffrey, HSB
Hager, CH
Zabinski, JS
Wal, RLV
Andrews, R
Street, KW
Lerch, BA
Abel, PB
AF Miyoshi, Kazuhisa
Sanders, Jeffrey H.
Hager, Carl H., Jr.
Zabinski, Jeffrey S.
Wal, Randall L. Vander
Andrews, Rodney
Street, Kenneth W.
Lerch, Bradley A.
Abel, Phillip B.
TI Wear behavior of low-cost, lightweight TiC/Ti-6Al-4V composite under
fretting: Effectiveness of solid-film lubricant counterparts
SO TRIBOLOGY INTERNATIONAL
LA English
DT Article
DE fretting wear; TiC/Ti-6Al-4V; anti-galling coatings
ID FATIGUE
AB The wear behavior of low-cost, lightweight 10 wt% titanium carbide (TiC)-particulate-reinforced Ti-6Al-4V matrix composite (TiC/Ti-6Al-4V) was examined under fretting at 296, 423, and 523 K in air. Bare 10 wt% TiC/Ti-6Al-4V hemispherical pins were used in contact with dispersed multiwalled carbon nanotubes (MWNTs), magnetron-sputtered diamond-like carbon/chromium (DLC/Cr), magnetron-sputtered graphite-like carbon/chromium (GLC/Cr), and magnetron-sputtered molybdenum disulfide/titanium (MoS2/Ti) deposited on Ti-6Al-4V, Ti-48Al-2Cr-2Nb, and nickel-based superalloy 718. When TiC/Ti-6Al-4V was brought into contact with bare Ti-6Al-4V, bare Ti-48Al-2Cr-2Nb, and bare nickel-based superalloy 718, strong adhesion, severe galling, and severe wear occurred. However, when TiC/Ti-6Al-4V was brought into contact with MWNT, DLC/Cr, GLC/Cr, and MoS2,/Ti coatings, no galling occurred in the contact, and relatively minor wear was observed regardless of the coating. All the MWNT, DLC/Cr, GLC/Cr, and MoS2/Ti coatings on Ti-6Al-4V were effective from 296 to 523 K, but the effectiveness of the MWNT, DLC/Cr, GLC/Cr, and MoS2/Ti coatings decreased as temperature increased. Published by Elsevier Ltd.
C1 NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
USAF, Wright Patterson AFB, OH 45433 USA.
Natl Ctr Space Explorat Res, Glenn Res Ctr, Cleveland, OH 44135 USA.
Univ Kentucky, Lexington, KY 40511 USA.
RP Miyoshi, K (reprint author), NASA, Glenn Res Ctr, 21000 Brookpk Rd, Cleveland, OH 44135 USA.
EM Kazuhisa.Miyoshi@nasa.gov
NR 20
TC 11
Z9 11
U1 0
U2 11
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0301-679X
J9 TRIBOL INT
JI Tribol. Int.
PD JAN
PY 2008
VL 41
IS 1
BP 24
EP 33
DI 10.1016/j.triboint.2007.04.006
PG 10
WC Engineering, Mechanical
SC Engineering
GA 222CU
UT WOS:000250274500004
ER
PT J
AU Kang, YS
Sharma, SK
Sanders, JH
Voevodin, AA
AF Kang, Young S.
Sharma, Shashi K.
Sanders, Jeffrey H.
Voevodin, Andrey A.
TI Finite Element Analysis of Multilayered and Functionally Gradient
Tribological Coatings with Measured Material Properties
SO TRIBOLOGY TRANSACTIONS
LA English
DT Article
DE Coatings; Wear-Resistant; Solid Lubricants; Dynamic Modeling; Stress
Analysis; Nanoindentation
ID PULSED-LASER DEPOSITION; ELASTIC HALF-SPACE; THIN-FILMS; SLIDING
CONTACT; MECHANICAL-PROPERTIES; LAYERED MEDIA; STRESS; NANOINDENTATION;
SYSTEMS; HARDNESS
AB A model has been developed to study the stress distribution in Ti(1-x)C(x) multilayered functionally gradient (FG) coatings, with a top coating of diamond-like carbon (DLC), on 440C stainless steel substrates. Using the finite element method, these gradient coatings were assumed as a series of perfectly bonded layers with unique material properties and layer thickness. In addition, a matrix of nanoindentation experiments were performed to measure material properties of each Ti(1-x)C(x) layer on separate coating blocks. The yield strength of the coating materials was then determined by coupling the finite element analysis model in connection with the nanoindentation technique. Once developed, this model was used to examine the threshold of plasticity and identify the plastic deformation zone inside the multilayered coatings and substrate. This work shows how the multilayered FG Ti/TiC/DLC coating system improves the coating integrity under heavy loading conditions.
C1 [Kang, Young S.] Universal Technol Corp, Dayton, OH 45432 USA.
[Sharma, Shashi K.; Sanders, Jeffrey H.; Voevodin, Andrey A.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Kang, YS (reprint author), Timken Co, Canton, OH 44706 USA.
RI Voevodin, Andrey/I-6684-2013
FU Materials and Manufacturing Directorate of the Air Force Research
Laboratory
FX This work was conducted at Wright-Patterson Air Force Base, Ohio, and
was supported by the Materials and Manufacturing Directorate of the Air
Force Research Laboratory.
NR 32
TC 2
Z9 2
U1 1
U2 12
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1040-2004
J9 TRIBOL T
JI Tribol. Trans.
PY 2008
VL 51
IS 6
BP 817
EP 828
DI 10.1080/10402000802302482
PG 12
WC Engineering, Mechanical
SC Engineering
GA 506XB
UT WOS:000270809700008
ER
PT S
AU Mantravadi, S
Cain, S
AF Mantravadi, Samuel
Cain, Stephen
BE Dolne, JJ
Karr, TJ
Gamiz, VL
TI Analysis and Verification of Resolution Limits of a Hyperspectral Imager
Using Computed Tomography
SO UNCONVENTIONAL IMAGING IV
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Unconventional Imaging IV
CY AUG 11, 2008
CL San Diego, CA
SP SPIE
DE C hromotomographic Hyperspectral Imaging Sensor; Hyperspectral Sensor;
Computed Tomography
AB In recent work,(1) the resolution limits of two variations of chromo-tomographic hyperspectral imaging sensors were discussed. In this paper, we examine another variation of this type of hyperspectral sensor the present a reconstruction method using computed tomography to estimate a hyperspectral data cube and examine the limits of resolution. The resolution analysis is then compared with a simulation to determine the validity of the calculated resolution bounds. The simulation setup is discussed and results are presented.
C1 [Mantravadi, Samuel; Cain, Stephen] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Mantravadi, S (reprint author), USAF, Inst Technol, 3550 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Samuel.Mantravadi@afit.edu; Stephen.Cain@afit.edu
NR 7
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 978-0-8194-7314-1
J9 P SOC PHOTO-OPT INS
PY 2008
VL 7094
AR 709408
DI 10.1117/12.799236
PG 11
WC Optics; Imaging Science & Photographic Technology
SC Optics; Imaging Science & Photographic Technology
GA BJA99
UT WOS:000264283600007
ER
PT S
AU Mitra, AK
Westbrook, L
Corgan, J
Young, S
Nagar, J
Bariagaber, T
AF Mitra, Atindra K.
Westbrook, Lamar
Corgan, Johnathan
Young, Sean
Nagar, Jogender
Bariagaber, Tedros
BE Gerhart, GR
Gage, DW
Shoesmaker, CM
TI Integrated RF modules for cooperative UGV/UAV tandems - art. no. 69621Y
SO UNMANNED SYSTEMS TECHNOLOGY X
SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE)
LA English
DT Proceedings Paper
CT Conference on Unmanned Systems Technology X
CY MAR 17-20, 2008
CL Orlando, FL
SP SPIE
DE cooperative UAV tandems; low-cost RF sensors; lightweight RF sensors;
software radar; wi-fi radar; micro-impulse radar antennas
AB This paper addresses a number of design issues that are associated with integrating lightweight and low-cost RF (Radio Frequency) sensors onto small UGV's (Unmanned Ground Vehicles) and UAV's (Unmanned Aerial Vehicles). Modular\integrated RF sub-systems functions that are discussed include lightweight software programmable radar (or software radar) using COTS software radio components and compact microstrip antenna design concepts for low-frequency surface penetration radars. A discussion on the potential for implementing lightweight multi-function RF systems as well as a discussion on novel futuristic concepts that explore the limits of sensor/platform integration is included.
C1 [Mitra, Atindra K.; Westbrook, Lamar; Young, Sean; Nagar, Jogender] USAF, Res Lab, SNRR, Wright Patterson AFB, OH 45433 USA.
RP Mitra, AK (reprint author), USAF, Res Lab, SNRR, Bldg 620,2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
NR 5
TC 1
Z9 1
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 978-0-8194-7153-6
J9 P SOC PHOTO-OPT INS
PY 2008
VL 6962
BP Y9621
EP Y9621
DI 10.1117/12.785258
PG 15
WC Robotics; Remote Sensing; Optics; Imaging Science & Photographic
Technology
SC Robotics; Remote Sensing; Optics; Imaging Science & Photographic
Technology
GA BHY01
UT WOS:000257316300060
ER
PT J
AU Weld, KJ
Arze, J
Montiglio, C
Bush, AC
Cespedes, RD
AF Weld, Kyle J.
Arze, Jorge
Montiglio, Csasduo
Bush, Anneke C.
Cespedes, R. Daoane
TI Lapra-Ty holding strength and slippage with various suture types and
sizes
SO UROLOGY
LA English
DT Article
AB OBJECTIVES To investigate the holding strength and slippage of Lapra-Ty clips on various suture types and sizes.
METHODS Using an automated materials testing system with the Lapra-Ty in a fixed position, Lapra-Ty holding strength and displacement were determined with 0, 2-0, 3-0, and 4-0 Vicryl, Monocryl, and polydioxanone suture (PDS). To simulate clinical application, Lapra-Tys were also tested by applying a load to these sutures after being passed through a full-thickness layer of tautly suspended fresh porcine bladder tissue. Three trials were performed with each suture type and size.
RESULTS The Lapra-Ty holding strength with Vicryl suture was significantly higher than with Monocryl or PDS of the same suture size in bladder tissue trials. Monocryl suture had a significantly higher displacement than Vicryl or PDS of the same suture size in bladder tissue trials (except for 4-0 Monocryl and PDS having insignificantly different displacements). Lapra-Tys slipped off Vicryl, Monocryl, and PDS in 25%, 67%, and 67% of their respective trials. Lapra-Tys did not slip during any of the trials with 2-0 suture of any type or 3-0 Vicryl. Lapra-Tys with holding strengths on suture less than approximately 8 Newtons (N) slipped and greater than 8 N pulled through the bladder tissue without slipping.
CONCLUSIONS The optimal suture type and size to maximize Lapra-Ty holding strength and minimize slippage was determined to be 2-0 and 3-0 Vicryl, 2-0 Monocryl, and 2-0 PDS. Monocryl suture stretches more than Vicryl and PDS at higher loads.
C1 [Weld, Kyle J.; Arze, Jorge; Montiglio, Csasduo; Bush, Anneke C.; Cespedes, R. Daoane] Wilford Hall USAF Med Ctr, Dept Urol, MCSU, Lackland AFB, TX 78236 USA.
RP Weld, KJ (reprint author), Wilford Hall USAF Med Ctr, Dept Urol, MCSU, 2200 Bergquist Dr, Lackland AFB, TX 78236 USA.
EM Kyle.weld@lackland.af.mil
NR 4
TC 3
Z9 3
U1 0
U2 1
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0090-4295
J9 UROLOGY
JI Urology
PD JAN
PY 2008
VL 71
IS 1
BP 32
EP 35
DI 10.1016/j.urology.2007.08.061
PG 4
WC Urology & Nephrology
SC Urology & Nephrology
GA 263CH
UT WOS:000253194700009
PM 18242360
ER
PT J
AU Ashworth, ARS
Vuong, QC
Rossion, B
Tarr, MJ
AF Ashworth, Alan R. S., III
Vuong, Quoc C.
Rossion, Bruno
Tarr, Michael J.
TI Recognizing rotated faces and Greebles: What properties drive the face
inversion effect?
SO VISUAL COGNITION
LA English
DT Article
ID UPSIDE-DOWN FACES; OBJECT RECOGNITION; THATCHER ILLUSION; NATURAL
OBJECTS; MENTAL ROTATION; INVERTED FACES; ORIENTATION; IDENTIFICATION;
PERCEPTION; CONTEXT
AB The fact that faces are strongly affected by picture-plane inversion has often been cited as evidence for face-specific mechanisms. It is unclear, however, whether this face inversion effect is driven by properties shared by faces or whether the effect is specific to faces as a category. To address this issue, we compared the recognition of faces and novel Greebles, which were specifically matched to faces along various stimulus dimensions. In two experiments, participants were required to name individual faces or Greebles following training at either single or multiple orientations. We found that performance systematically decreased with increasing misorientation from either the upright (Experiment 1) or nearest trained orientation (Experiment 2). Importantly, the magnitude of this orientation effect was similar for both faces and Greebles. Taken together, these results suggest that the face inversion effect may be a consequence of the visual homogeneity of the stimulus category, regardless of the category.
C1 [Tarr, Michael J.] Brown Univ, Dept Cognit & Linguist Sci, Providence, RI 02912 USA.
[Rossion, Bruno] Catholic Univ Louvain, Unite Cognit & Dev, B-3000 Louvain, Belgium.
[Rossion, Bruno] Catholic Univ Louvain, Neurophysiol Lab, B-3000 Louvain, Belgium.
[Vuong, Quoc C.] Max Planck Inst Biol Cybernet, Dept Cognit & Computat Psychophys, Tubingen, Germany.
[Ashworth, Alan R. S., III] Yale Univ, New Haven, CT USA.
[Ashworth, Alan R. S., III] USAF, Brooks AF Base, AF Res Lab, San Antonio, TX USA.
RP Vuong, QC (reprint author), Univ Newcastle, Div Psychol, Henry Wellcome Bldg Neuroecol, Newcastle Upon Tyne NE2 4HH, Tyne & Wear, England.
EM q.c.vuong@ncl.ac.uk
NR 46
TC 14
Z9 15
U1 1
U2 9
PU PSYCHOLOGY PRESS
PI HOVE
PA 27 CHURCH RD, HOVE BN3 2FA, EAST SUSSEX, ENGLAND
SN 1350-6285
J9 VIS COGN
JI Vis. Cogn.
PY 2008
VL 16
IS 6
BP 754
EP 784
DI 10.1080/13506280701381741
PG 31
WC Psychology, Experimental
SC Psychology
GA 318SY
UT WOS:000257114300004
ER
PT S
AU Arnold, G
Ross, T
Westerkamp, L
Carin, L
Moses, R
AF Arnold, Gregory
Ross, Timothy
Westerkamp, Lori
Carin, Lawrence
Moses, Randolph
BE Rahman, Z
Reichenbach, SE
Neifeld, MA
TI The ATR Center and ATRpedia
SO VISUAL INFORMATION PROCESSING XVII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Visual Information Processing XVII
CY MAR 18-19, 2008
CL Orlando, FL
SP SPIE
DE target recognition; computer vision; pattern recognition; ATR theory;
ATRpedia; challenge problems
AB The purpose of the Automatic Target Recognition (ATR) Center is to develop an environment conducive to producing theoretical and practical advances in the field of ATR. This will be accomplished by fostering intellectual growth of ATR practitioners at all levels. From an initial focus on students and performance modeling, the Center's efforts are extending to professionals in government, academia, and industry. The ATR Center will advance the state of the art in ATR through collaboration between these researchers.
To monitor how well the Center is achieving its goals, several. tangible products have been identified: graduate student research, publicly available data and associated challenge problems, a wiki to capture the body of knowledge associated with ATR, development of stronger relationships with the users of ATR technology, development of a curriculum for ATR system development, and maintenance of documents that describe the state-of-the-art in ATR.
This presentation and accompanying paper develop the motivation for the ATR Center, provide detail on the Center's products, describe the Center's business model, and highlight several new data sets and challenge problems. The "persistent and layered sensing" context and other technical themes in Which this research is couched are also presented.
Finally, and most importantly, we will discuss how industry, academia, and government can participate in this alliance and invite comments on the plans for the third phase of the Center.
C1 [Arnold, Gregory; Ross, Timothy; Westerkamp, Lori] USAF, Res Lab, Sensors Directorate, Washington, DC 20330 USA.
RP Arnold, G (reprint author), USAF, Res Lab, Sensors Directorate, Washington, DC 20330 USA.
EM lcarin@ece.duke.edu; moses.2@osu.edu
NR 5
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 978-0-8194-7169-7
J9 PROC SPIE
PY 2008
VL 6978
AR 69780T
DI 10.1117/12.783439
PG 15
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic; Optics; Imaging Science & Photographic Technology
SC Computer Science; Engineering; Optics; Imaging Science & Photographic
Technology
GA BIA03
UT WOS:000257876900023
ER
PT S
AU Rodriguez, JD
Bauer, KW
Miller, JO
Neher, RE
AF Rodriguez, June D.
Bauer, Kenneth W., Jr.
Miller, John O.
Neher, Robert E., Jr.
BE Rahman, Z
Reichenbach, SE
Neifeld, MA
TI Building prediction models of large hierarchical simulation models with
artificial neural networks and other statistical techniques
SO VISUAL INFORMATION PROCESSING XVII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Visual Information Processing XVII
CY MAR 18-19, 2008
CL Orlando, FL
SP SPIE
DE aggregation; metamodeling; artificial neural network; prediction
AB The purpose of this research is to examine how to achieve suitable aggregation in the simulation of large systems. More specifically, investigating how to accurately aggregate hierarchical lower-level (higher resolution) models into the next higher-level in order to reduce the complexity of the overall simulation model. The initial approach used in this research was to use a realistic simulation model of a complex flying training model to apply the model aggregation methodologies using artificial neural networks and other statistical techniques. In order to test the techniques proposed, we modified a flying training model built for another study to suit the needs of our experiment. The study examines the effectiveness of three types of artificial neural networks as a metamodel in predicting outputs of the flying training model. Feed-forward, radial basis function, and generalized regression. neural networks are considered and are compared to the truth simulation model, where the truth model is when actual lower-level model outputs are used as a direct input into the next higher-level model. The desired real-world application of the developed simulation aggregation process will be applied to military combat modeling in the area of combat identification (CID).
C1 [Rodriguez, June D.; Bauer, Kenneth W., Jr.; Miller, John O.] USAF, Dept Operat Sci, AFIT ENS, Wright Patterson AFB, OH 45433 USA.
RP Rodriguez, JD (reprint author), USAF, Dept Operat Sci, AFIT ENS, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM jiune.rodriguez@us.af.mil
NR 27
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 978-0-8194-7169-7
J9 PROC SPIE
PY 2008
VL 6978
AR 69780M
DI 10.1117/12.776715
PG 12
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic; Optics; Imaging Science & Photographic Technology
SC Computer Science; Engineering; Optics; Imaging Science & Photographic
Technology
GA BIA03
UT WOS:000257876900017
ER
PT S
AU Schweitzer, D
Baird, L
Bahn, W
AF Schweitzer, D.
Baird, L.
Bahn, W.
BE Goodall, JR
TI Visually understanding jam resistant communication
SO VIZSEC 2007
SE MATHEMATICS AND VISUALIZATION
LA English
DT Proceedings Paper
CT 4th International Workshop on Computer Security
CY OCT 29, 2007
CL Sacramento, CA
AB The primary goal of information security is to ensure the confidentiality, integrity, authenticity, and availability of information. Availability is often relegated to a discussion of denial of service attacks on network resources. Another form of denying availability is to prevent communication through the use of traditional jamming techniques. At the United States Air Force Academy Center for Information Security, we have been working on a new algorithm, BBC, which is based on a new type of coding theory known as concurrent codes that is resistant to traditional jamming techniques. While the formal definition and proofs of concurrent codes can be daunting, the algorithm's effectiveness can be easily conveyed and appreciated through visual demonstration. This paper briefly introduces concurrent codes and describes an interactive applet that visually demonstrates the algorithm's effectiveness in a noisy environment.
C1 [Schweitzer, D.; Baird, L.; Bahn, W.] USAF Acad, Colorado Springs, CO 80840 USA.
RP Schweitzer, D (reprint author), USAF Acad, Colorado Springs, CO 80840 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 1612-3786
BN 978-3-540-78242-1
J9 MATH VISUAL
PY 2008
BP 175
EP 186
DI 10.1007/978-3-540-78243-8_12
PG 12
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods; Mathematics
SC Computer Science; Mathematics
GA BIC21
UT WOS:000258328500012
ER
PT J
AU Troe, J
Miller, TM
Viggiano, AA
AF Troe, Juergen
Miller, Thomas M.
Viggiano, Albert A.
TI Low-energy electron attachment to SF(6). II. Temperature and pressure
dependences of dissociative attachment
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID RATE CONSTANTS K(E,J); UNIMOLECULAR REACTIONS; SULFUR-HEXAFLUORIDE;
N-BUTYLBENZENE; NEGATIVE-IONS; AB-INITIO; MOLECULES; THERMOCHEMISTRY;
DECOMPOSITION; ACTIVATION
AB Low-energy electron-molecule collisions, leading to dissociative attachment through metastable anionic states, are kinetically modeled within the framework of statistical unimolecular rate theory. The reaction e(-)+SF(6)-->SF(5)(-)+F is used as an illustrative example. The modeling is applied to new measurements of branching fractions for SF(5)(-) formation in the bath gas He between 360 and 670 K at 1 and 2 Torr, and between 490 and 620 K over the range of 0.3-9 Torr. The analysis of the data follows the previous kinetic modeling of the nondissociative electron attachment, e(-)+SF(6)-->SF(6)(-), from Part I of this series. Experimental results from the present work and the literature on branching fractions and total cross sections for anion formation as functions of electron energies, bath gas temperatures and pressures, as well as observation times are analyzed. The assumption of a participation of the electronic ground state of SF(6)(-) alone suffices to model the available experimental data. A value of the dissociation energy of SF(6)(-) into SF(5)(-)+F of E(0,dis)=1.61(+/- 0.05) eV is determined, which may be compared to the electron affinity of SF(6), EA=1.20(+/- 0.05) eV, such as derived in Part III of this series. (C) 2007 American Institute of Physics.
C1 [Troe, Juergen] Univ Gottingen, Inst Phys Chem, D-37077 Gottingen, Germany.
[Miller, Thomas M.; Viggiano, Albert A.] USAF, Res Lab, Space Vehicles Directorate, Bedford, MA 01731 USA.
RP Troe, J (reprint author), Univ Gottingen, Inst Phys Chem, Tammannstr 6, D-37077 Gottingen, Germany.
EM shoff@gwdg.de
NR 57
TC 32
Z9 32
U1 1
U2 8
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 DEC 28
PY 2007
VL 127
IS 24
AR 244304
DI 10.1063/1.2804762
PG 13
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 246DN
UT WOS:000251987800010
PM 18163672
ER
PT J
AU Troe, J
Miller, TM
Viggiano, AA
AF Troe, Juergen
Miller, Thomas M.
Viggiano, Albert A.
TI Low-energy electron attachment to SF(6). I. Kinetic modeling of
nondissociative attachment
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID DISSOCIATIVE ATTACHMENT; POLYATOMIC-MOLECULES; SULFUR-HEXAFLUORIDE;
SUPERSONIC BEAM; RATE CONSTANTS; TEMPERATURE; DEPENDENCE; RESOLUTION;
STABILIZATION; AFFINITIES
AB Low-energy electron-molecule collisions are analyzed by kinetic modeling within the framework of statistical unimolecular rate theory. Nondissociative electron attachment to SF(6) is used to illustrate the approach. An internally consistent representation is provided for attachment cross sections and rate coefficients in relation to detachment lifetimes, and both thermal and specific rate coefficients for detachment. By inspecting experimental data, the contributions of intramolecular vibrational redistribution and vibrationally inelastic collisions can be characterized quantitatively. This allows for a prediction of attachment rate coefficients as a function of electron and gas temperature as well as gas pressure over wide ranges of conditions. The importance of carefully controlling all experimental parameters, including the carrier gas pressure, is illustrated. The kinetic modeling in Part II of this series is extended to dissociative electron attachment to SF(6). (C) 2007 American Institute of Physics.
C1 [Troe, Juergen] Univ Gottingen, Inst Phys Chem, D-37077 Gottingen, Germany.
[Miller, Thomas M.; Viggiano, Albert A.] USAF, Res Lab, Space Vehicles Directorate, Bedford, MA 01731 USA.
RP Troe, J (reprint author), Univ Gottingen, Inst Phys Chem, Tammannstr 6, D-37077 Gottingen, Germany.
EM shoff@gwdg.de
NR 55
TC 44
Z9 44
U1 0
U2 5
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 DEC 28
PY 2007
VL 127
IS 24
AR 244303
DI 10.1063/1.2804761
PG 12
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 246DN
UT WOS:000251987800009
PM 18163671
ER
PT J
AU Viggiano, AA
Miller, TM
Friedman, JF
Troe, J
AF Viggiano, Albert A.
Miller, Thomas M.
Friedman, Jeffrey F.
Troe, Juergen
TI Low-energy electron attachment to SF(6). III. From thermal detachment to
the electron affinity of SF(6)
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID UNIMOLECULAR REACTIONS; DISSOCIATION; FORMALDEHYDE; KINETICS
AB The thermal attachment of electrons to SF(6) is measured in a flowing-afterglow Langmuir-probe apparatus monitoring electron concentrations versus axial position in the flow tube. Temperatures between 300 and 670 K and pressures of the bath gas He in the range of 0.3-9 Torr are employed. Monitoring the concentrations of SF(6)(-) and SF(5)(-), the latter of which does not detach electrons under the applied conditions, an onset of thermal detachment and dissociation of SF(6) at temperatures above about 530 K is observed. Analysis of the mechanism allows one to deduce thermal detachment rate coefficients. Thermal dissociation rate coefficients for the reaction SF(6)(-)-->SF(5)(-)+F can only be estimated by unimolecular rate theory based on the results from Part I and II of this series. Under the applied conditions they are found to be smaller than detachment rate coefficients. Combining thermal attachment and detachment rates in a third-law analysis, employing calculated vibrational frequencies of SF(6) and SF(6)(-), leads to the electron affinity (EA) of SF(6)(-). The new value of EA=1.20(+/- 0.05) eV is significantly higher than previous recommendations which were based on less direct methods. (C) 2007 American Institute of Physics.
C1 [Viggiano, Albert A.; Miller, Thomas M.] USAF, Res Lab, Space Vehicles Directorate, Bedford, MA 01731 USA.
[Friedman, Jeffrey F.] Univ Puerto Rico, Dept Phys, Mayaguez, PR 00681 USA.
[Troe, Juergen] Univ Gottingen, Inst Phys Chem, D-37077 Gottingen, Germany.
RP Viggiano, AA (reprint author), USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, Bedford, MA 01731 USA.
EM shoff@gwdg.de
NR 32
TC 33
Z9 33
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 DEC 28
PY 2007
VL 127
IS 24
AR 244305
DI 10.1063/1.2804764
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 246DN
UT WOS:000251987800011
PM 18163673
ER
PT J
AU Maynard, NC
Burke, WJ
Ober, DM
Farrugia, CJ
Kucharek, H
Lester, M
Mozer, FS
Russell, CT
Siebert, KD
AF Maynard, N. C.
Burke, W. J.
Ober, D. M.
Farrugia, C. J.
Kucharek, H.
Lester, M.
Mozer, F. S.
Russell, C. T.
Siebert, K. D.
TI Interaction of the bow shock with a tangential discontinuity and solar
wind density decrease: Observations of predicted fast mode waves and
magnetosheath merging
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID INTERPLANETARY MAGNETIC-FIELD; LATITUDE BOUNDARY-LAYER; DAYSIDE
MAGNETOPAUSE; MAGNETOSPHERIC RESPONSE; AMPTE/IRM OBSERVATIONS; EARTHS
MAGNETOPAUSE; ION-ACCELERATION; ELECTRIC-FIELD; SOUTHWARD IMF; MACH
NUMBER
AB Shortly after 0600 UT on 7 April 2000 a tangential discontinuity (TD) in the solar wind passed the Advanced Composition Explorer satellite (ACE). It was characterized by a rotation of the interplanetary magnetic field (IMF) by similar to 145 degrees and more than a factor-of-2 decrease in the plasma density. About 50 min later, Polar encountered more complex manifestations of the discontinuity near noon in the magnetosheath outside the Northern Hemisphere cusp. On the basis of Polar observations, theoretical modeling, and MHD simulations we interpret the event as demonstrating that (1) a fast mode rarefaction wave was generated during the TD-bow shock interaction, (2) the fast wave carried a significant fraction of the density change to the magnetopause while the remainder stayed with the transmitted discontinuity, and (3) magnetic merging occurred between IMF field lines within the magnetosheath on opposite sides of the discontinuity's surface as it approached the magnetopause. Before the discontinuity passed the spacecraft, Polar detected ions accelerated antiparallel to B in the fast wave and perpendicular to B in a weak slow mode structure located adjacent to and just downstream of the fast wave. The antiparallel accelerated ions in the fast wave had no measurable ion-velocity dispersion signature, placing their source a few R(E) equatorward of Polar. Simulation results, a Walen test, detections of wave Poynting flux parallel to B, bidirectional electron heat flux, and ion velocity enhancements all indicate that the three ion bursts associated with the passage of the discontinuity were signatures of time-dependent, magnetic merging events within the magnetosheath.
C1 [Maynard, N. C.; Farrugia, C. J.; Kucharek, H.] Univ New Hampshire, Ctr Space Sci, Durham, NH 03842 USA.
[Burke, W. J.] Space Vehicles Directorate, AF Res Lab, Hanscom AFB, MA 01731 USA.
[Burke, W. J.; Ober, D. M.] Boston Coll, Inst Sci Res, Chestnut Hill, MA 02467 USA.
[Lester, M.] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
[Mozer, F. S.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Russell, C. T.] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA.
[Siebert, K. D.] Sparta Syst Inc, Nashua, NH 03060 USA.
RP Maynard, NC (reprint author), Univ New Hampshire, Ctr Space Sci, 39 Coll Rd, Durham, NH 03842 USA.
EM nelson.maynard@unh.edu
NR 57
TC 14
Z9 14
U1 2
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD DEC 27
PY 2007
VL 112
IS A12
AR A12219
DI 10.1029/2007JA012293
PG 20
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 246OH
UT WOS:000252015900002
ER
PT J
AU Nagel, JR
Warnick, KF
Jeffs, BD
Fisher, JR
Bradley, R
AF Nagel, James R.
Warnick, Karl F.
Jeffs, Brian D.
Fisher, J. Richard
Bradley, Richard
TI Experimental verification of radio frequency interference mitigation
with a focal plane array feed
SO RADIO SCIENCE
LA English
DT Article
ID ANTENNA
AB [1] We demonstrate the use of spatial filtering algorithms for radio frequency interference (RFI) mitigation in conjunction with a focal plane array of electrically small elements. The array consists of a seven-element hexagonal arrangement of thickened dipole antennas with 1600 MHz designed center frequency backed by a circular ground plane at the focal plane of a 3 m parabolic reflector. Rooftop-mounted signal sources were used to simulate a weak signal of interest at boresight and a strong, broadband interferer in the reflector sidelobes. Using an adaptive beamformer, the amplitude of the interfering signal was reduced sufficiently to recover the signal of interest. For an interference to noise ratio of 15 dB as measured at the center array element, the interferer was suppressed to the level of the fluctuations of the 10-s integrated noise floor (the minimum detectable signal level was interference-limited and no longer decreased after 10 s integration). Similar cancellation performance was demonstrated for a nonstationary interferer moving at an angular velocity of 0.1 degrees per second. Pattern rumble due to beamformer adaptation was observed and quantified. For a moving RFI source, the degree of pattern rumble was found to be unacceptably large in terms of its effects on the maximum stable integration time and receiver sensitivity. An array feed with more elements together with specialized signal processing algorithms designed to suppress pattern rumble will likely be required in order to use adaptive spatial filtering for astronomical observations.
C1 [Nagel, James R.] Lockheed Martin Inc, Vandenberg AFB, CA USA.
[Warnick, Karl F.; Jeffs, Brian D.] Brigham Young Univ, Dept Elect & Comp Engn, Provo, UT 84602 USA.
[Fisher, J. Richard; Bradley, Richard] Natl Radio Astron Observ, Charlottesville, VA USA.
RP Nagel, JR (reprint author), Lockheed Martin Inc, Vandenberg AFB, CA USA.
NR 15
TC 7
Z9 7
U1 0
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0048-6604
J9 RADIO SCI
JI Radio Sci.
PD DEC 27
PY 2007
VL 42
IS 6
AR RS6013
DI 10.1029/2007RS003630
PG 8
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
GA 246OM
UT WOS:000252016400001
ER
PT J
AU Bonvicino, A
Hultron, S
Fadare, O
AF Bonvicino, Amanda
Hultron, Sonny
Fadare, Oluwole
TI Papanicolaou test interpretations of "atypical squamous cells, cannot
exclude high-grade squamous intraepithelial lesion"
SO CANCER CYTOPATHOLOGY
LA English
DT Article
DE colposcopy; CIN2+; Papanicolaou (Pap) test; high-grade squamous
intraepithelial lesion; atypical squamous cells; cervix; ASC-H
ID ASC-H; FOLLOW-UP; UNDETERMINED SIGNIFICANCE; CLINICAL-SIGNIFICANCE;
CYTOLOGIC DIAGNOSIS; CERVICAL CYTOLOGY; BETHESDA SYSTEM; PAP TEST;
WOMEN; HSIL
AB BACKGROUND. Management guidelines for women with Papanicolaou (Pap) test interpretations of ASC-H (atypical squamous cells, cannot exclude high-grade squamous intraepithelial lesion) reflect substantial risk, which ranges from 10% to 68%, of a cervical intraepithelial neoplasia grade 2 or worse (CIN2+) in their follow-up histologic samples. The present study was initiated to determine the number of colposcopic procedures and the time frame that are typically required for a definitive diagnosis of a CIN2+ lesion after a Papanicolaou (Pap) test interpretation of ASC-H in routine practice.
METHODS. Clinicopathologic data on consecutive ASC-H interpretations, 97% of which were on liquid-based preparations, were reviewed. The number of biopsies (which was used in this context as a surrogate indicator for the number of colposcopic procedures) as well as the average duration required for a follow-up histologic diagnosis of CIN2+ were determined.
RESULTS. Of 500 ASC-H interpretations, 75 were excluded for a variety of reasons and 165 lacked follow-up in our records. The average age and follow-up duration for the remaining 260 patients was 35.6 years and 18.5 months, respectively. CIN2+ was diagnosed in 49 (40%) of the 122 patients with at least 1 histologic follow-up. Of these 49 patients, 72% (35 of 49) were diagnosed on the first follow-up cervical biopsy, 14% (7 of 49) and 8% (4 of 49) were diagnosed on the second and third follow-up biopsies, respectively; in only 6% (3 of 49) was a fourth follow-up biopsy required. Overall, an average of 1.53 biopsies (range, 1-4) was required to attain a definitive diagnosis of CIN2+, and 28% of patients required more than 1 follow-up biopsy. The average period between the index ASC-H interpretations and CIN2+ diagnoses was 5.5 months. The average time to CIN2+ diagnoses by the first follow-up biopsy was 3 months; for diagnoses made on subsequent biopsies, the average additional follow-up duration was 8 months. Of the eventual CIN2+ diagnoses, 84% were rendered within 12 months of their associated index ASC-H interpretations.
CONCLUSIONS. 1) A substantial subset-28%-of patients with biopsy-proven CIN2+ after ASC-H interpretations required more than 1 colposcopy for a definitive diagnosis of a high-grade dysplastic lesion. 2) If a CIN2+ lesion is present, the vast majority can be diagnosed in a biopsy performed within 1 year of the ASC-H interpretation.
C1 [Bonvicino, Amanda; Hultron, Sonny; Fadare, Oluwole] Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA.
[Bonvicino, Amanda; Hultron, Sonny] Brooke Army Med Ctr, Dept Pathol, Ft Sam Houston, TX USA.
[Bonvicino, Amanda; Hultron, Sonny] San Antonio Uniformed Serv Hlth Educ Consortium, Pathol Program, San Antonio, TX USA.
[Fadare, Oluwole] Univ Texas Hlth Sci Ctr San Antonio, Dept Pathol, San Antonio, TX USA.
RP Fadare, O (reprint author), Wilford Hall USAF Med Ctr, Dept Pathol, 220 Bergquist Dr, Ste 1, Lackland AFB, TX 78236 USA.
EM oluwolefadare@yahoo.com
NR 30
TC 19
Z9 20
U1 0
U2 0
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0008-543X
J9 CANCER CYTOPATHOL
JI Cancer Cytopathol.
PD DEC 25
PY 2007
VL 111
IS 6
BP 477
EP 481
DI 10.1002/cncr.23121
PG 5
WC Oncology; Pathology
SC Oncology; Pathology
GA 244TS
UT WOS:000251888800004
PM 17932941
ER
PT J
AU Rosario, D
Zahn, CM
Bush, AC
Kendall, BS
AF Rosario, Domingo
Zahn, Christopher M.
Bush, Anneke C.
Kendall, Brian S.
TI The significance of high-risk human papillomavirus detection in women
aged >= 50 years with atypical squamous cells of undetermined
significance cytologic preparations
SO CANCER CYTOPATHOLOGY
LA English
DT Article
DE cytology; papillomavirus infection; cervix uteri; cervix dysplasia
ID MANAGEMENT
AB BACKGROUND. The use of high-risk human papillomavirus (HRHPV) testing in the triage of women with a cytologic diagnosis of atypical squamous cells of undetermined significance (ASC-US) has gained widespread acceptance. To date, very little has been reported on the significance of the detection of HRHPV in elderly women.
METHODS. Results of HRHPV testing performed on women aged >= 50 years were examined for a 20-month period. Reflex testing for HRHPV was performed on residual liquid-based cytology specimens from women who were diagnosed with ASCUS by using the Digene Hybrid Capture method. Follow-up information on women who had HRHPV detected was obtained from subsequent pathology reports (cytology and surgical).
RESULTS. HRHPV testing was performed on 762 specimens from women aged >= 50 years; virus was detected in 105 specimens (13.8%), and follow-up was available in 63 of those women (60%). Follow-up results included negative tests in 32 women (50.8% of those with follow-up available), low-grade squamous intraepithelial lesion in 26 women (41.3%), and high-grade squamous intraepithelial lesion (HSIL) in 5 women (7.9%). No glandular neoplasia or invasive carcinoma was identified. Relative light units/cutoff (RLU/CO) values ranged from 1 RLU/CO to 1705 RLU/ CO; no significant associations were identified between RLU/CO values and follow-up results.
CONCLUSIONS. Although HRHPV was detected in a minority of samples, HSIL was present in 7.9% of those with HRHPV. This confirms that the presence of HRHPV in women aged >= 50 years with ASC-US specimens needs clinical follow-up. There were no significant differences in RLU/CO values between women with positive versus negative follow-up to allow for further discrimination for follow-up.
C1 [Rosario, Domingo; Kendall, Brian S.] Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA.
[Zahn, Christopher M.] Uniformed Serv Univ Hlth Sci, Dept Obstet & Gynecol, Bethesda, MD USA.
[Bush, Anneke C.] Wilford Hall USAF Med Ctr, Dept Clin Res & Biostat, Lackland AFB, TX USA.
RP Kendall, BS (reprint author), Wilford Hall USAF Med Ctr, Dept Pathol, 2200 Bergquist Dr, Ste 1, Lackland AFB, TX 78236 USA.
EM brian.kendall@lackland.af.mil
NR 8
TC 2
Z9 2
U1 0
U2 1
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0008-543X
J9 CANCER CYTOPATHOL
JI Cancer Cytopathol.
PD DEC 25
PY 2007
VL 111
IS 6
BP 487
EP 490
DI 10.1002/cncr.23118
PG 4
WC Oncology; Pathology
SC Oncology; Pathology
GA 244TS
UT WOS:000251888800006
PM 17973252
ER
PT J
AU Liao, L
Dai, LM
Smith, A
Durstock, M
Lu, JP
Ding, JF
Tao, Y
AF Liao, Liang
Dai, Liming
Smith, Adam
Durstock, Michael
Lu, Jianping
Ding, Jianfu
Tao, Ye
TI Photovoltaic-active dithienosilole-containing polymers
SO MACROMOLECULES
LA English
DT Article
ID ORGANIC SOLAR-CELLS; ELECTRON-TRANSPORTING PROPERTIES; SILICON-BRIDGED
BITHIOPHENES; LIGHT-EMITTING-DIODES; EL DEVICES; ELECTROLUMINESCENT
DEVICES; CONJUGATED OLIGOMERS; THERMAL-STABILITY; EMISSION;
OLIGOTHIOPHENE
AB Silole-containing polymers consisting of a dithienosilole homopolymer backbone (12) or an alternating dithienosilole and 4,7-bis(2-thienyl)-2,1,3-benzothiadiazole copolymer backbone (13) were synthesized. The presence of planar dithienosilole tricyclic units along these g.-conjugated polymer backbones lowered the band gap and led to strong absorption in the visible region of the solar spectrum. The introduction of electron-withdrawing benzothiadiazole moieties along the dithienosilole backbone further reduced the optical band gap and increased the interchain interaction. Bulk-heterojunction organic solar cells using 1:1 w/w polymer 12 or 13:PCBM (methanofullerene [6.6]-phenyl C61-butyric acid methyl ester) blends as the photoactive layers were prepared. Photovoltaic cells with copolymer 13 as the electron donor and PCBM as the electron acceptor exhibited an increased energy conversion efficiency by a factor of 3 up to 0.18% under an AM 1.5 simulated solar light at 100 mW/cm(2) after thermal annealing at 140 degrees C.
C1 [Liao, Liang; Dai, Liming] Univ Dayton, Dept Chem & Mat Engn, Dayton, OH 45469 USA.
[Smith, Adam; Durstock, Michael] Wright Paterson AFB, AF Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Lu, Jianping; Ding, Jianfu; Tao, Ye] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada.
RP Dai, LM (reprint author), Univ Dayton, Dept Chem & Mat Engn, 300 Coll Pk, Dayton, OH 45469 USA.
EM ldai@udayton.edu; Michael.durstock@wpafb.af.mil;
Jianping.Lu@nrc-cnrc.gc.ca
NR 34
TC 123
Z9 124
U1 0
U2 29
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD DEC 25
PY 2007
VL 40
IS 26
BP 9406
EP 9412
DI 10.1021/ma071825x
PG 7
WC Polymer Science
SC Polymer Science
GA 242KT
UT WOS:000251724700029
ER
PT J
AU Iacono, ST
Budy, SM
Mabry, JM
Smith, DW
AF Iacono, Scott T.
Budy, Stephen M.
Mabry, Joseph M.
Smith, Dennis W., Jr.
TI Synthesis, characterization, and surface morphology of pendant
polyhedral oligomeric silsesquioxane perfluorocyclobutyl aryl ether
copolymers
SO MACROMOLECULES
LA English
DT Article
ID HIGHLY EFFICIENT; SOLID-SURFACES; POLYMERS; FLUOROPOLYMERS;
NANOSTRUCTURE; WETTABILITY; WATER
AB The synthesis and characterization of solution processable, semi-fluorinated perfluorocyclobutyl (PFCB) aryl ether polymers possessing covalently bound pendant polyhedral oligomeric silsesquioxanes (POSS) cages is reported. The synthesis of POSS aryl trifluorovinyl ether (TFVE) monomers was accomplished by the condensation of commercial monosilanolalkyl-POSS with a TFVE-functionalized chlorosilane. POSS TFVE monomers were elucidated by (1)H, (19)F, (13)C, and (29)Si NMR spectroscopy, ATR-FTIR analysis, and elemental (C, H, and F) combustion analysis. Bulk thermal copolymerization of POSS TFVE monomers afforded random and block PFCB aryl ether copolymers functionalized with various POSS loadings. Quantitative monomer conversion was monitored by 19F NMR, which produced copolymer number-average molecular weights (M(n)) of (19.5-24.9) x 10(3) (in CHCl(3) using polystyrene as standard) determined by gel permeation chromatography (GPC). Thermal properties of POSS PFCB aryl ether copolymers were evaluated by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). Transmission electron microscope (TEM) analysis of spin cast optically transparent, flexible POSS PFCB aryl ether copolymer films revealed the presence of 5-20 nm-sized POSS agglomerates. Optical profilometer analysis of spin and drop cast film surfaces exhibited a modest increase in surface roughness of POSS PFCB aryl ether copolymers as compared to PFCB aryl ether homopolymers without POSS inclusion. The POSS copolymers exhibited a modest increase in hydrophobicity as measured by static water contact angle analysis. Synthesis, characterization, thermal analysis, and unique surface features of POSS PFCB aryl ether copolymers are discussed.
C1 [Iacono, Scott T.; Budy, Stephen M.; Smith, Dennis W., Jr.] Clemson Univ, Dept Chem, Clemson, SC 29634 USA.
[Iacono, Scott T.; Budy, Stephen M.; Smith, Dennis W., Jr.] Clemson Univ, COMSET, Adv Mat Res Lab, Clemson, SC 29634 USA.
[Mabry, Joseph M.] AF Res Lab, Propils Directorate, Edwards AFB, CA 93524 USA.
RP Smith, DW (reprint author), Clemson Univ, Dept Chem, Clemson, SC 29634 USA.
EM dwsmith@clemson.edu
NR 38
TC 48
Z9 48
U1 4
U2 30
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD DEC 25
PY 2007
VL 40
IS 26
BP 9517
EP 9522
DI 10.1021/ma071732f
PG 6
WC Polymer Science
SC Polymer Science
GA 242KT
UT WOS:000251724700044
ER
PT J
AU Terry, NB
Alley, TG
Russell, TH
AF Terry, Nathan B.
Alley, Thomas G.
Russell, Timothy H.
TI An explanation of SRS beam cleanup in graded-index fibers and the
absence of SRS beam cleanup in step-index fibers
SO OPTICS EXPRESS
LA English
DT Article
ID STIMULATED RAMAN-SCATTERING; MULTIMODE FIBER; OPTICAL FIBERS;
HIGH-POWER; LASER; COMBINATION; PULSES
AB Beam cleanup via stimulated Raman scattering in multimode fibers is modeled by numerically considering the competition between the Stokes modes of graded-index and step-index fibers. The relative gain of each Stokes mode is calculated by considering the overlap the various pump and Stokes modes of the fibers. Mode competition in a graded-index fiber favors the LP01 Stokes mode while mode competition in a step-index fiber does not favor the LP01 Stokes mode. This model explains why beam cleanup has only been reported for graded-index fibers and not for step-index fibers. (C) 2007 Optical Society of America.
C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Terry, Nathan B.; Alley, Thomas G.; Russell, Timothy H.] USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Terry, NB (reprint author), USAF, Res Lab, 2241 Avion Circle, Wright Patterson AFB, OH 45433 USA.
EM nathan.terry@wpafb.af.mil
NR 17
TC 18
Z9 19
U1 3
U2 6
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD DEC 24
PY 2007
VL 15
IS 26
BP 17509
EP 17519
DI 10.1364/OE.15.017509
PG 11
WC Optics
SC Optics
GA 246YX
UT WOS:000252045400005
PM 19551044
ER
PT J
AU DeBoer, GD
Dodd, JA
AF DeBoer, Gary D.
Dodd, James A.
TI Ab initio energies and product branching ratios for the O+C3H6 reaction
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID CROSSED MOLECULAR-BEAM; GAS-PHASE COLLISIONS; SET MODEL CHEMISTRY; FAST
O(P-3) ATOMS; LOW-EARTH-ORBIT; CHEMICAL-REACTIONS; REACTION SYSTEMS;
VINOXY RADICALS; PHOTODISSOCIATION; SPECTROSCOPY
AB Intermediate and transition-state energies have been calculated for the O + C3H6 (propene) reaction using the compound ab initio CBS-QB3 and G3 methods in combination with density functional theory. The lowest-lying triplet and singlet potential energy surfaces of the O-C3H6 system were investigated. RRKM statistical theory was used to predict product branching fractions over the 300-3000 K temperature and 0.001-760 Torr pressure ranges. The oxygen atom adds to the C3H6 terminal olefinic carbon in the primary step to generate a nascent triplet biradical, CH3CHCH2O. On the triplet surface, unimolecular dissociation of CH3CHCH2O to yield H + CH3CHCHO is favored over the entire temperature range, although the competing H2CO + CH3CH product channel becomes significant at high temperature. Rearrangement of triplet CH3CHCH2O to CH3CH2CHO (propanal) via a 1,2 H-atom shift has a barrier of 122.3 kJ mol(-1), largely blocking this reaction channel and any subsequent dissociation products. Intersystem crossing of triplet CH3CHCH2O to the singlet surface, however, leads to facile rearrangement to singlet CH3CH2CHO, which dissociates via numerous product channels. Pressure was found to have little influence over the branching ratios under most conditions, suggesting that the vibrational self-relaxation rates for p <= 1 atm are negligible compared to the dissociation rates.
C1 [Dodd, James A.] AF Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA.
[DeBoer, Gary D.] LeTourneau Univ, Dept Chem & Phys, Longview, TX 75602 USA.
RP Dodd, JA (reprint author), AF Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA.
EM James.Dodd@hanscom.af.mil
NR 53
TC 8
Z9 8
U1 0
U2 5
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD DEC 20
PY 2007
VL 111
IS 50
BP 12977
EP 12984
DI 10.1021/jp0755037
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 240VG
UT WOS:000251615700016
PM 17999472
ER
PT J
AU Shore, RA
Yaghjian, AD
AF Shore, Robert A.
Yaghjian, Arthur D.
TI Traveling waves on two- and three-dimensional periodic arrays of
lossless scatterers
SO RADIO SCIENCE
LA English
DT Article
ID ELECTROMAGNETIC-WAVES; SCHLOMILCH SERIES; SPHERES; MATRIX
AB The kd-ss d ( dispersion) equations are found for traveling waves on two- and three-dimensional infinite periodic arrays of small lossless acoustic monopoles, electric or magnetic dipoles, and magnetodielectric spheres. Using Floquet mode expansions and then expressions for the rapid summation of Schlomilch series, prohibitively slowly convergent summations are converted to forms that can be used for the efficient calculation of the kd-ss d equations. Computer programs have been written to obtain the kd-ss d diagrams for all the arrays treated, and representative numerical results are presented and discussed. Expressions, more accurate than the Clausius-Mossotti relations, are obtained for the effective or bulk permittivity and permeability of the arrays utilizing quantities readily available from the solutions of the kd-ss d equations. Exact computable expressions for the fields of three-dimensional lossless or lossy magnetodielectric sphere arrays that are finite in the direction of the array axis, illuminated by a plane wave parallel to the array axis, are obtained from the analyses performed to obtain the kd-ss d curves for the infinite arrays.
C1 [Shore, Robert A.; Yaghjian, Arthur D.] Air Force Res Lab, Hanscom AFB, MA USA.
RP Shore, RA (reprint author), Air Force Res Lab, Hanscom AFB, MA USA.
NR 40
TC 42
Z9 42
U1 1
U2 8
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0048-6604
EI 1944-799X
J9 RADIO SCI
JI Radio Sci.
PD DEC 19
PY 2007
VL 42
IS 6
AR RS6S21
DI 10.1029/2007RS003647
PG 40
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
GA 244RT
UT WOS:000251883700001
ER
PT J
AU Lu, YL
Knize, RJ
AF Lu, Yalin
Knize, R. J.
TI Laser-assisted fabrication of new slab-coupled lithium niobate optical
waveguide
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Laser Synthesis and Processing of Advanced Materials held
at the E-MRS 2007 Spring Meeting
CY 2007
CL Strasbourg, FRANCE
SP European Mat Res Soc
DE slab-coupled waveguide; pulsed laser deposition; lithium niobate film
ID LINBO3
AB Recently a new type of lithium niobate waveguide was suggested for potential nonlinear optic applications. The waveguide consists of a uniform large core and a leaky coupled slab for realizing a lateral optical confinement to support the fundamental spatial mode propagation. Inside the waveguide, the slab layer is required to have a refractive index slightly lower than that of the core, but higher than that of the substrate. Lithium niobate doped with magnesium oxides shows an increased refractive index that is dependent on the dopant's concentration. Therefore, in order to fabricate such waveguides, the pulsed laser deposition approach was used to study the growth of such composition-modified lithium niobate as the slab layer. The as-grown films were characterized on its expitaxy, structure, and optical performance, via X-ray diffraction analysis, optical guiding experiment, etc. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Lu, Yalin; Knize, R. J.] USAF Acad, LORC, Colorado Springs, CO 80840 USA.
RP Lu, YL (reprint author), USAF Acad, LORC, 2354 Fairchild Dr 2A31, Colorado Springs, CO 80840 USA.
EM yalin.lu@usafa.edu
NR 9
TC 0
Z9 0
U1 1
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD DEC 15
PY 2007
VL 254
IS 4
BP 1079
EP 1082
DI 10.1016/j.apsusc.2007.08.035
PG 4
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 250KT
UT WOS:000252299500059
ER
PT J
AU Lu, Y
Knize, RJ
AF Lu, Yalin
Knize, R. J.
TI Modified laser ablation process for nanostructured thermoelectric
nanomaterial fabrication
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Laser Synthesis and Processing of Advanced Materials held
at the E-MRS 2007 Spring Meeting
CY 2007
CL Strasbourg, FRANCE
SP European Mat Res Soc
DE thermoelectric effect; Bi2Te3 nanocrystals; nanostructured nanocrystals;
modified pulsed laser deposition process
ID THERMAL-CONDUCTIVITY
AB A modified pulsed laser deposition process was used to enhance the nanostructure generation inside Bi2Te3 nanocrystals. In this process, an additional femotosecond laser beam was used to add an energy shock on the ablated flume, which can result in rich nanostructures embedded inside Bi2Te3 nanocrystals. A large Si wafer was used to 'freeze' such nanostructures and to effectively collect such nanostructured nanocrystals for further processing. The generated nanocrystals were studied by X-ray diffraction and scanning transmission electron microscopy, and the results prove the existence of such embedded nanostructures. Such nanocrystals were also characterized electrically and thermally for the conductivity measurements. Published by Elsevier B.V.
C1 [Lu, Yalin; Knize, R. J.] USAF Acad, Laser Optics Res Ctr LORC, Colorado Springs, CO 80840 USA.
RP Lu, YL (reprint author), USAF Acad, Laser Optics Res Ctr LORC, 2345 Fairchild Dr 2A31, Colorado Springs, CO 80840 USA.
EM yalin.lu@usafa.edu; yalin.lu@usafa.af.mil
NR 7
TC 1
Z9 1
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD DEC 15
PY 2007
VL 254
IS 4
BP 1211
EP 1214
DI 10.1016/j.apsusc.2007.06.040
PG 4
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 250KT
UT WOS:000252299500085
ER
PT J
AU Krishnamoorti, R
Vaia, RA
AF Krishnamoorti, Ramanan
Vaia, Richard A.
TI Polymer nanocomposites
SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
LA English
DT Editorial Material
DE crystallization; glass transition; nanocomposites; nanotechnology;
structure-property relations
ID LAYERED SILICATE NANOCOMPOSITES; POLY(ETHYLENE OXIDE); SEGMENTAL
DYNAMICS; CARBON NANOTUBES; RADICAL POLYMERIZATION; CLAY NANOCOMPOSITES;
GLASS-TRANSITION; CRYSTALLIZATION; CONFINEMENTS; HYBRID
AB Polymer nanocomposites are distinguished by the convergence of length scales corresponding to the radius of gyration of the polymer chains, a dimension of the nanoparticle and the mean distance between the nanoparticles. The consequences of this convergence on the physics of the polymer chains are considered, and some of the outstanding issues and their potential consequences on structure-property relations for polymer nanocomposites are highlighted. (c) 2007 Wiley Periodicals, Inc.
C1 [Krishnamoorti, Ramanan] Univ Houston, Dept Chem & Biomol Engn, Houston, TX 77204 USA.
[Krishnamoorti, Ramanan] Univ Houston, Dept Chem, Houston, TX 77204 USA.
[Vaia, Richard A.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Krishnamoorti, R (reprint author), Univ Houston, Dept Chem & Biomol Engn, Houston, TX 77204 USA.
EM Ramanan@uh.edu; richard.vaia@wpafb.af.mil
RI Krishnamoorti, Ramanan/F-7914-2011
OI Krishnamoorti, Ramanan/0000-0001-5831-502X
NR 41
TC 141
Z9 145
U1 8
U2 60
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0887-6266
J9 J POLYM SCI POL PHYS
JI J. Polym. Sci. Pt. B-Polym. Phys.
PD DEC 15
PY 2007
VL 45
IS 24
BP 3252
EP 3256
DI 10.1002/polb.21319
PG 5
WC Polymer Science
SC Polymer Science
GA 239ZK
UT WOS:000251556600007
ER
PT J
AU Zhang, ZY
Keppens, V
Senkov, ON
Miracle, DB
AF Zhang, Zhiying
Keppens, Veerle
Senkov, Oleg N.
Miracle, Daniel B.
TI Elastic properties of Ca-based bulk metallic glasses studied by resonant
ultrasound spectroscopy
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE elastic properties; Ca-based bulk metallic glasses; resonant ultrasound
spectroscopy; internal friction
ID THERMAL-STABILITY; MG-ZN; FORMING ABILITY; ALLOYS; FRAGILITY
AB We report measurements of the elastic properties and internal friction of Ca-based bulk metallic glasses (BMGs), Ca50Mg20Cu30, Ca55Mg18Zn11Cu16 and Ca65Mg15Zn2O (numbers indicate at.%), as a function of temperature between 5 and 400K. Below the glass transition temperature, both Young's modulus and shear modulus decrease with increasing temperature, and the Poisson ratio increases with increasing temperature. Above the glass transition temperature, these trends reverse due to crystallization. At temperatures close to the glass transition temperature, we observe the onset of a peak in the internal friction Q(-1), attributed to crystallization. (C) 2007 Elsevier B.V. All rights reserved.
C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
Universal Energy Syst Inc, Dayton, OH 45432 USA.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Keppens, V (reprint author), Univ Tennessee, Dept Mat Sci & Engn, 434 Dougherty Hall, Knoxville, TN 37996 USA.
EM vkeppens@utk.edu
RI Senkov, Oleg/C-7197-2012
OI Senkov, Oleg/0000-0001-5587-415X
NR 15
TC 13
Z9 13
U1 0
U2 7
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 DEC 15
PY 2007
VL 471
IS 1-2
BP 151
EP 154
DI 10.1016/j.msea.2007.01.157
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 220PF
UT WOS:000250168000023
ER
PT J
AU Tuomisto, F
Look, DC
Farlow, GC
AF Tuomisto, F.
Look, D. C.
Farlow, G. C.
TI Defect studies in electron-irradiated ZnO and GaN
SO PHYSICA B-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT 24th International Conference on Defects in Semiconductors
CY JUL 22-27, 2007
CL Albuquerque, NM
DE positron annihilation; vacancy defects; GaN; ZnO
ID POSITRON-ANNIHILATION SPECTROSCOPY; OPTICAL-DETECTION; ZINC VACANCY;
RESONANCE
AB We present experimental results obtained with positron annihilation spectroscopy in room-temperature electron-irradiated n-type ZnO and GaN. The cation vacancies act as important compensating centers in 2 MeV electron-irradiated samples, even though their introduction rates are different by 2 orders of magnitude. In addition, negatively charged non-open volume defects that also compensate the n-type conductivity are produced together with the cation vacancies at similar introduction rates. The low introduction rates of compensating defects in ZnO demonstrate the radiation hardness of the material. Isochronal thermal annealings were performed to study the dynamics of the irradiation-induced defects. In 2 MeV electron-irradiated ZnO, all the defects introduced in the irradiation disappear already at 600 K, while 1100 K is needed in GaN. Several separate annealing stages of the defects are observed in both materials, the first at 400 K. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Tuomisto, F.] Helsinki Univ Technol, Phys Lab, Espoo 02015, Finland.
[Look, D. C.] Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
[Look, D. C.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Farlow, G. C.] Wright State Univ, Dept Phys, Dayton, OH 45435 USA.
RP Tuomisto, F (reprint author), Helsinki Univ Technol, Phys Lab, Espoo 02015, Finland.
EM filip.tuomisto@tkk.fi
RI Tuomisto, Filip/B-8189-2008
OI Tuomisto, Filip/0000-0002-6913-5654
NR 29
TC 10
Z9 11
U1 2
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4526
J9 PHYSICA B
JI Physica B
PD DEC 15
PY 2007
VL 401
BP 604
EP 608
DI 10.1016/j.physb.2007.09.032
PG 5
WC Physics, Condensed Matter
SC Physics
GA 246XF
UT WOS:000252041000143
ER
PT J
AU Howe, B
Bareno, J
Sardela, M
Wen, JG
Greene, JE
Hultman, L
Voevodin, AA
Petrov, I
AF Howe, B.
Bareno, J.
Sardela, M.
Wen, J. G.
Greene, J. E.
Hultman, L.
Voevodin, A. A.
Petrov, I.
TI Growth and physical properties of epitaxial metastable Hf1-xAlxN alloys
deposited on MgO(001) by ultrahigh vacuum reactive magnetron sputtering
SO SURFACE & COATINGS TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 34th International Conference on Metallurgical Coatings and Thin Films
CY APR 23-27, 2007
CL San Diego, CA
SP Amer Vacuum Soc, Adv Surface Engn Div
DE magnetron sputtering; HfN; hard coatings; XRD; TEM
ID NANOCOMPOSITE COATINGS; LAYERS; SUPERHARD; HARDNESS; FIELD; PVD
AB Epitaxial metastable Hf1-xAlxN alloys with 0 <= x <= 0.50 were grown on MgO(001) substrates at 600 degrees C by ultrahigh vacuum reactive magnetron sputtering from Hf and Al targets in 90% Ar+ 10%N-2 discharges at 7 mTorr. X-Ray diffraction and cross-sectional transmission electron microscopy show that Hf1-xAlxN alloys are single crystals with the Bl-NaCl structure. Rutherford backscattering spectroscopy investigations reveal that all films are slightly overstochiometric with N/(Hf+Al)= 1.05 +/- 0.05. The relaxed lattice parameter decreased linearly from 0.4519 nm with x=0 to 0.4438 nm with x=0.50, compared to 0.4320 nm expected from the linear Vegard's rule. We find a metastable single phase field that is remarkably broad given the large lattice mismatch (similar or equal to 9%) between the two alloy components. Alloying HfN with AIN leads to an increase in hardness (similar or equal to 30% to 32.4 +/- 0.7 GPa), as well as nanostructured compositional modulations due to the onset of spinodal decomposition. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Howe, B.; Bareno, J.; Sardela, M.; Wen, J. G.; Greene, J. E.; Petrov, I.] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA.
[Howe, B.; Bareno, J.; Sardela, M.; Wen, J. G.; Greene, J. E.; Petrov, I.] Univ Illinois, Dept Mat Sci, Urbana, IL 61801 USA.
[Hultman, L.] Linkoping Univ, Dept Phys, S-58183 Linkoping, Sweden.
[Howe, B.; Voevodin, A. A.] AF Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
RP Petrov, I (reprint author), Univ Illinois, Frederick Seitz Mat Res Lab, 104 S Goodwin, Urbana, IL 61801 USA.
EM petrov@uiuc.edu
RI Voevodin, Andrey/I-6684-2013; Petrov, Ivan/D-4910-2011;
OI Petrov, Ivan/0000-0002-2955-4897; Bareno, Javier/0000-0003-1230-9278
NR 28
TC 13
Z9 13
U1 1
U2 5
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0257-8972
J9 SURF COAT TECH
JI Surf. Coat. Technol.
PD DEC 15
PY 2007
VL 202
IS 4-7
BP 809
EP 814
DI 10.1016/j.surfcoat.2007.05.079
PG 6
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA 240WM
UT WOS:000251618900040
ER
PT J
AU Tuteja, A
Choi, W
Ma, ML
Mabry, JM
Mazzella, SA
Rutledge, GC
McKinley, GH
Cohen, RE
AF Tuteja, Anish
Choi, Wonjae
Ma, Minglin
Mabry, Joseph M.
Mazzella, Sarah A.
Rutledge, Gregory C.
McKinley, Gareth H.
Cohen, Robert E.
TI Designing superoleophobic surfaces
SO SCIENCE
LA English
DT Article
ID OIL-REPELLENT SURFACES; ROUGH SURFACES; WATER; FILMS
AB Understanding the complementary roles of surface energy and roughness on natural nonwetting surfaces has led to the development of a number of biomimetic superhydrophobic surfaces, which exhibit apparent contact angles with water greater than 150 degrees and low contact angle hysteresis. However, superoleophobic surfaces-those that display contact angles greater than 150 degrees with organic liquids having appreciably lower surface tensions than that of water-are extremely rare. Calculations suggest that creating such a surface would require a surface energy lower than that of any known material. We show how a third factor, re-entrant surface curvature, in conjunction with chemical composition and roughened texture, can be used to design surfaces that display extreme resistance to wetting from a number of liquids with low surface tension, including alkanes such as decane and octane.
C1 MIT, Dept Mech Engn, Cambridge, MA 02139 USA.
MIT, Dept Chem Engn, Cambridge, MA 02139 USA.
USAF, Res Lab, Edwards AFB, CA 93524 USA.
RP McKinley, GH (reprint author), MIT, Dept Mech Engn, Cambridge, MA 02139 USA.
EM gareth@mit.edu; recohen@mit.edu
RI McKinley, Gareth/G-4872-2011
OI McKinley, Gareth/0000-0001-8323-2779
NR 35
TC 1216
Z9 1247
U1 121
U2 893
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD DEC 7
PY 2007
VL 318
IS 5856
BP 1618
EP 1622
DI 10.1126/science.1148326
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 238BG
UT WOS:000251421700044
PM 18063796
ER
PT J
AU Ogrin, D
Anderson, RE
Colorado, R
Maruyama, B
Pender, MJ
Moore, VC
Pheasant, ST
McJilton, L
Schmidt, HK
Hauge, RH
Billups, WE
Tour, JM
Smalley, RE
Barron, AR
AF Ogrin, Douglas
Anderson, Robin E.
Colorado, Ramon, Jr.
Maruyama, Benji
Pender, Mark J.
Moore, Valerie C.
Pheasant, Sean T.
McJilton, Laura
Schmidt, Howard K.
Hauge, Robert H.
Billups, W. Edward
Tour, James M.
Smalley, Richard E.
Barron, Andrew R.
TI Amplification of single-walled carbon nanotubes from designed seeds:
Separation of nucleation and growth
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID NANOCLUSTER HXPMO12O40-SUBSET-OF-H4MO72FE30(O2CME)(15)O-254(H2O)(98);
QUANTUM WIRES; CATALYST; ROUTE
AB Single-walled carbon nanotubes (SWNTs) may be grown from designed seeds containing an SWNT and the catalyst required for continued growth. Dodecyl side-walled functionalized SWNTs (DD-SWNTs) are endfunctionalized with 4-hydroxypyridine via dicyclohexylcarbodiimide coupling to allow covalent coordination of an inorganic cluster pro-catalyst (FeMoC). DD-SWNT-py-FeMoC on spin-on glass was exposed to H-2/CH4 at 800 degrees C, resulting in 3-fold growth in the length of 40% of the seed S"Ts. Only similar to 1% of the procatalyst alone nucleate SWNTs under the same conditions, suggesting effective separation of the nucleation and growth processes.
C1 Rice Univ, Carbon Nanotechnol Lab, Richard E Smalley Inst Nanoscale Sci & Technol, Houston, TX 77005 USA.
Rice Univ, Dept Chem, Houston, TX 77005 USA.
AF Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Barron, AR (reprint author), Rice Univ, Carbon Nanotechnol Lab, Richard E Smalley Inst Nanoscale Sci & Technol, Houston, TX 77005 USA.
EM arb@rice.edu
RI Hauge, Robert/A-7008-2011; Maruyama, Benji/E-3634-2010;
OI Hauge, Robert/0000-0002-3656-0152; Barron, Andrew/0000-0002-2018-8288;
Tour, James/0000-0002-8479-9328
NR 16
TC 16
Z9 16
U1 2
U2 22
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 DEC 6
PY 2007
VL 111
IS 48
BP 17804
EP 17806
DI 10.1021/jp0712506
PG 3
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 236GV
UT WOS:000251291900020
ER
PT J
AU Singamaneni, S
McConney, ME
LeMieux, MC
Jiang, H
Enlow, JO
Bunning, TJ
Naik, RR
Tsukruk, VV
AF Singamaneni, Srikanth
McConney, Michael E.
LeMieux, Melburne C.
Jiang, Hao
Enlow, Jesse O.
Bunning, Timothy J.
Naik, Rajesh R.
Tsukruk, Vladimir V.
TI Polymer-silicon flexible structures for fast chemical vapor detection
SO ADVANCED MATERIALS
LA English
DT Article
ID CANTILEVER ARRAY; RESONATING MICROCANTILEVERS; COATED MICROCANTILEVER;
HYDRAZINE DETECTION; ARTIFICIAL NOSE; THIN-FILMS; SENSOR; SENSITIVITY;
STRESS; SPECTROSCOPY
AB Stimuli-responsive microactuators controlled by the interfacial stress across the polymer/silicon interface are introduced as simple, miniature, and flexible sensing platforms for chemical vapor detection. The sensors detect water vapor with sensitivities of 10 parts per billion (+/-0.00005% relative humidity) and faster than previously recorded response times. These characteristics make the bimaterial silicon cantilevers excellent candidates for critical security and defense needs as well as for environmental monitoring.
C1 [Singamaneni, Srikanth; McConney, Michael E.; Tsukruk, Vladimir V.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
[LeMieux, Melburne C.] Georgia Inst Technol, Sch Polymer Textile & Fiber Engn, Atlanta, GA 30332 USA.
[Jiang, Hao; Enlow, Jesse O.; Bunning, Timothy J.; Naik, Rajesh R.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Tsukruk, VV (reprint author), Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
EM vladimir@mse.gatech.edu
RI Singamaneni, Srikanth/A-8010-2008; McConney, Michael/A-1680-2011
NR 60
TC 38
Z9 38
U1 4
U2 26
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0935-9648
J9 ADV MATER
JI Adv. Mater.
PD DEC 3
PY 2007
VL 19
IS 23
BP 4248
EP +
DI 10.1002/adma.200701419
PG 9
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 245BS
UT WOS:000251910100024
ER
PT J
AU Nesterov, VN
Sarkisov, SS
Curley, MJ
Urbas, A
Ruiz, T
AF Nesterov, Vladimir N.
Sarkisov, Sergey S.
Curley, Michael J.
Urbas, Augustine
Ruiz, Tania
TI 3,5-Bis[4-(diethylamino)benzylidene]-1,1-dimethyl-4-oxopiperidinium
iodide: a prospective biophotonic material
SO ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE
LA English
DT Article
AB In the title compound, C29H40N3O+center dot I-, the heterocyclic ring in the two independent molecules exhibits a sofa conformation, with the N atom deviating from the plane through the other ring atoms. The dihedral angles between the planar part of the heterocycle and the two almost planar fragments, which include the benzene rings and bridging atoms, are 29.21 (9)/5.43 (8) and 21.44 (10)/25.17 (10)degrees in the two independent molecules. Weak intermolecular C-H center dot center dot center dot O and C-H center dot center dot center dot I contacts link the cations and anions in the crystal structure.
C1 New Mexico Highlands Univ, Dept Nat Sci, Las Vegas, NM 87701 USA.
SSS Opt Technol LLC, Huntsville, AL 35816 USA.
Alabama A&M Univ, Dept Phys, Normal, AL 35762 USA.
Air Force Res Lab, MLPJ, Wright Patterson AFB, OH 45433 USA.
RP Nesterov, VN (reprint author), New Mexico Highlands Univ, Dept Nat Sci, Las Vegas, NM 87701 USA.
EM vnesterov@nmhu.edu
NR 11
TC 4
Z9 4
U1 0
U2 8
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 1600-5368
J9 ACTA CRYSTALLOGR E
JI Acta Crystallogr. Sect. E.-Struct Rep. Online
PD DEC
PY 2007
VL 63
BP O4784
EP U5749
DI 10.1107/S1600536807058667
PN 12
PG 17
WC Crystallography
SC Crystallography
GA 236DD
UT WOS:000251282300535
ER
PT J
AU Vibert, D
Redfield, RC
Hausler, R
AF Vibert, Dominique
Redfield, Robin C.
Hausler, Rudolf
TI Benign paroxysmal positional vertigo in mountain bikers
SO ANNALS OF OTOLOGY RHINOLOGY AND LARYNGOLOGY
LA English
DT Article
DE benign paroxysmal positional vertigo; inner ear; mountain bike;
otoconia; sport; vertigo
ID BIKING INJURIES; TRAUMA
AB We evaluated 4 men who had benign paroxysmal positional vertigo (BPPV) that occured several hours after intensive mountain biking but without head trauma. The positional maneuvers in the planes of the posterior and horizontal canals elicited BPPV, as well as transitory nystagmus. This was attributed to both the posterior and horizontal semicircular canals (SCCs) on the left side in 1 patient, in these 2 SCCs on the right side in another patient, and to the right posterior SCC in the other 2 patients. The symptoms disappeared after physiotherapeutic maneuvers in 2 patients and spontaneously in the other 2 patients. Cross-country or downhill mountain biking generates frequent vibratory impacts, which are only partially filtered through the suspension fork and the upper parts of the body. Biomechanically, during a moderate jump, before landing, the head is subjected to an acceleration close to negative 1g, and during impact it is subjected to an upward acceleration of more than 2g. Repeated acceleration-deceleration events during intensive off-road biking might generate displacement and/or dislocation of otoconia from the otolithic organs, inducing the typical symptoms of BPPV. This new cause of posttraumatic BPPV should be considered as an injury of minor severity attributed to the practice of mountain biking.
C1 [Vibert, Dominique; Hausler, Rudolf] Univ Bern, Inselspital, Dept Otolaryngol Head & Neck Surg, CH-3010 Bern, Switzerland.
[Redfield, Robin C.] USAF Acad, Dept Engn Mech, Colorado Springs, CO USA.
RP Vibert, D (reprint author), Univ Bern, Inselspital, Dept ENT Head & Neck Surg, CH-3010 Bern, Switzerland.
NR 17
TC 10
Z9 10
U1 0
U2 0
PU ANNALS PUBL CO
PI ST LOUIS
PA 4507 LACLEDE AVE, ST LOUIS, MO 63108 USA
SN 0003-4894
J9 ANN OTO RHINOL LARYN
JI Ann. Otol. Rhinol. Laryngol.
PD DEC
PY 2007
VL 116
IS 12
BP 887
EP 890
PG 4
WC Otorhinolaryngology
SC Otorhinolaryngology
GA 243VI
UT WOS:000251825000005
PM 18217506
ER
PT J
AU Haji-Saeed, B
Sengupta, SK
Goodhue, WD
Khoury, J
Woods, CL
Kierstead, J
AF Haji-Saeed, Bahareh
Sengupta, Sandip K.
Goodhue, William D.
Khoury, Jed
Woods, Charles L.
Kierstead, John
TI Spectrally variable two-beam coupling nonlinear deconvolution
SO APPLIED OPTICS
LA English
DT Article
ID JOINT-TRANSFORM CORRELATOR; NOISE-REDUCTION; DYNAMIC-RANGE
AB In previous work, we introduced a dynamic range compression-based technique for image correction using nonlinear deconvolution; the impulse response of the distortion function and the distorted image are jointly transformed to pump a clean reference beam in a photorefractive two-beam coupling arrangement. The Fourier transform of the pumped reference beam contains the deconvolved image and its conjugate. Here we extend our work to spectrally variable dynamic range compression. This approach allows the retrieval of distorted. signals embedded in a very high noise environment and does not require one to work with a very high beam ratio as in our previous work. Resolution recovery of blurred noisy images is demonstrated for several different types of image blur. (c) 2007 Optical Society of America.
C1 [Haji-Saeed, Bahareh; Sengupta, Sandip K.] Univ Massachusetts, Dept Elect & Comp Engn, Lowell, MA 01854 USA.
[Goodhue, William D.] Univ Massachusetts, Dept Phys, Lowell, MA 01854 USA.
[Khoury, Jed; Woods, Charles L.] USAF, Res Lab, Optoelect Technol Branch, AFB, Bedford, MA 01731 USA.
[Haji-Saeed, Bahareh; Sengupta, Sandip K.; Kierstead, John] Solid State Sci Corp, Hollis, NH 03049 USA.
RP Haji-Saeed, B (reprint author), Univ Massachusetts, Dept Elect & Comp Engn, Lowell, MA 01854 USA.
EM bahareh.haji-saeed@hanscom.af.mil
NR 16
TC 2
Z9 2
U1 0
U2 0
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 DEC 1
PY 2007
VL 46
IS 34
BP 8244
EP 8249
DI 10.1364/AO.46.008244
PG 6
WC Optics
SC Optics
GA 283ZB
UT WOS:000254673900004
PM 18059663
ER
PT J
AU Crabtree, P
Woods, CL
Khoury, J
Goda, M
AF Crabtree, Peter
Woods, Charles L.
Khoury, Jed
Goda, Matthew
TI Binary phase-only filtering for turbulence compensation in fiber-coupled
free-space laser communication systems
SO APPLIED OPTICS
LA English
DT Article
ID CODING TECHNIQUE
AB Binary wavefront control in the focal plane (i.e., binary phase-only filtering) for partial compensation of atmospheric turbulence in fiber-coupled free-space laser communication systems is investigated. Numerical results from wave-optics simulations show that in an air-to-air scenario, the combination of binary phase-only filtering and centroid tracking provides mean fiber coupling efficiency close to that resulting from ideal least-squares adaptive optics, but without the requirement for direct wavefront sensing. This result suggests a simpler and less computationally demanding turbulence mitigation system that is more readily applied to tactical applications. (c) 2007 Optical Society of America.
C1 [Crabtree, Peter] USAF, Space Vehicles Directorate, Res Lab, Hanscom AFB, MA 01731 USA.
[Woods, Charles L.; Khoury, Jed] USAF, Sensors Directorate, Res Lab, Hanscom AFB, MA 01731 USA.
USAF, Sensors Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Crabtree, P (reprint author), USAF, Space Vehicles Directorate, Res Lab, 29 Randolph Rd, Hanscom AFB, MA 01731 USA.
EM peter.crabtree@hanscom.af.mil
NR 19
TC 3
Z9 3
U1 1
U2 2
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 DEC 1
PY 2007
VL 46
IS 34
BP 8335
EP 8345
DI 10.1364/AO.46.008335
PG 11
WC Optics
SC Optics
GA 283ZB
UT WOS:000254673900018
PM 18059677
ER
PT J
AU Wisman, DL
Marcum, SD
Ganguly, BN
AF Wisman, D. L.
Marcum, S. D.
Ganguly, B. N.
TI Electrical control of the thermodiffusive instability in premixed
propane-air flames
SO COMBUSTION AND FLAME
LA English
DT Article
DE hydrocarbon combustion; electric field; ionic recombination;
thermodiffusive instability; flame speed
ID HEAT RELEASE; COMBUSTION; CRITERION; LAMINAR; IONS
AB This work focuses upon the effects of DC electric fields on the stability of downward propagating atmospheric pressure premixed propane-air flames under experimental conditions that provide close coupling of the electric field to the flame. With the appropriate electrode geometry, modest applied voltages are shown to drive a stable conical flame first into a wrinkled-laminar flamelet geometry, and then further toward either a highly unstable distributed flamelet regime or a collective oscillation of the flame front. Applied potentials up through +5 kV over a 40-mm gap encompassing the flame front have been used to force the above transition sequence in flames with equivalence ratios between 0.8 and 1.3 and flow velocities up to 1.7 m/s. Experiments are reported that characterize the field-induced changes in the geometry of the reaction zone and the structure of the resulting unstable flame. The former is quantified by combustion intensity enhancement estimates derived from high-speed two-dimensional direct and spectroscopic imaging of chemiluminescence signals. The flame fluid mechanical response to the applied field, brought about by forcing positive flame ions counter to the flow, drives the effective flame Lewis number to values suitable for the onset of the thermodiffusive instability, even near stoichiometrie conditions. Possible field-driven flame ion recombination chemistry that would produce light reactants near the burner head and precipitate the onset of the thermodiffusive instability is proposed. Electrical measurements are also reported that establish that minimal electrical power input is required to produce the observed flame instabilities. Current continuity-based calculations allow estimates of the level of deficient light reactant necessary to cause the flame to become unstable. This applied-electric-field-induced modification of the thermodiffusive effect could serve as a potentially attractive means of controlling flame fluid-mechanical characteristics and validating combustion instability models over a wide range of equivalence ratios. Published by Elsevier Inc. on behalf of The Combustion Institute.
C1 Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
Miami Univ, Dept Phys, Oxford, OH 45056 USA.
RP Ganguly, BN (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM biswa.ganguly@wpafb.af.mil
NR 33
TC 32
Z9 39
U1 0
U2 10
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 DEC
PY 2007
VL 151
IS 4
BP 639
EP 648
DI 10.1016/j.combustflame.2007.06.021
PG 10
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 238WN
UT WOS:000251479000007
ER
PT J
AU Bhandari, Y
Sarkar, S
Groeber, M
Uchic, MD
Dimiduk, DM
Ghosh, S
AF Bhandari, Y.
Sarkar, S.
Groeber, M.
Uchic, M. D.
Dimiduk, D. M.
Ghosh, S.
TI 3D polycrystalline microstructure reconstruction from FIB generated
serial sections for FE analysis
SO COMPUTATIONAL MATERIALS SCIENCE
LA English
DT Article
DE FIB-SEM; 3D microstructure reconstruction; parametric surface; NURBS;
mesh generation
ID CRYSTAL PLASTICITY; CRYSTALLOGRAPHIC TEXTURE; FCC METALS; DEFORMATION;
COMPOSITE; EVOLUTION; FATIGUE; ALLOYS; NURBS; CREEP
AB This paper develops a comprehensive methodology for generating realistic 3D polycrystalline microstructures followed by discretization into a 3D tetrahedral mesh for finite element (FE) analysis. With input data on crystallographic orientations for a series of grain sections, created by a dual beam focused ion beam-scanning electron microscope (DB-FIB) system, the reconstruction method uses primitives in CAD modeling based on hierarchical geometrical representation. It involves steps of data cleanup, interface point identification, parametric polynomial and NURBS function based surface patch reconstruction, generalized cell-decomposition, geometric defeaturing and gap-overlap removal. The implementation of the entire procedure is done with the user-programming facilities of a commercial CAD package Unigraphics NX3. The reconstruction algorithms are validated with various error criteria. Subsequently, a finite mesh generator is developed to consistently discretize the reconstructed polycrystalline domain into a finite element mesh with resolution control that is necessary for meaningful computational analysis in microstructure-property evaluation. The mesh generator is enriched with mesh quality improvement and degree of freedom reduction tools. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Bhandari, Y.; Sarkar, S.; Groeber, M.] Ohio State Univ, Dept Mech Engn, Computat Mech Res Lab, Columbus, OH 43210 USA.
[Uchic, M. D.; Dimiduk, D. M.] USAF, Res Lab, AFRL MLLMD, Wright Patterson AFB, OH 45433 USA.
[Ghosh, S.] Ohio State Univ, Dept Mech Engn, Columbus, OH 43202 USA.
RP Ghosh, S (reprint author), Ohio State Univ, Dept Mech Engn, Computat Mech Res Lab, Columbus, OH 43210 USA.
EM ghosh.5@osu.edu
RI Ghosh, Somnath/A-2867-2012
NR 36
TC 47
Z9 50
U1 4
U2 26
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-0256
J9 COMP MATER SCI
JI Comput. Mater. Sci.
PD DEC
PY 2007
VL 41
IS 2
BP 222
EP 235
DI 10.1016/j.commatsci.2007.04.007
PG 14
WC Materials Science, Multidisciplinary
SC Materials Science
GA 240NK
UT WOS:000251594100013
ER
PT J
AU Stanek, MJ
Visbal, MR
Rizzetta, DP
Rubin, SG
Khosla, PK
AF Stanek, Michael J.
Visbal, Miguel R.
Rizzetta, Donald P.
Rubin, Stanley G.
Khosla, Prein K.
TI On a mechanism of stabilizing turbulent free shear layers in cavity
flows
SO COMPUTERS & FLUIDS
LA English
DT Article
ID DELTA-WING ROLL; NUMERICAL-SIMULATION; FLOWFIELDS
AB Turbulent free shear flows are subject to the well-known Kelvin-Helmholtz type [Panton RL. Incompressible flow. John Wiley and Sons; 1984. p. 675] instability, and it is well-known that any free shear flow which approximates a thin vorticity layer will be unstable to a wide range of amplitudes and frequencies of disturbance. In fact, much of what constitutes flow control in turbulent free shear layers consists of feeding a prescribed destabilizing disturbance to these layers. The question in the control of free shear flows is not whether the shear layer will be stable, but whether you can influence how the layer becomes unstable. In most cases, since these flows are so receptive to forcing input, and naturally tend toward instability, large changes in flow conditions can be achieved with very small amplitude periodic inputs. Recently, it has been discovered that turbulent free shear flows can also be stabilized using periodic forcing. This is, at first glance, counter-intuitive, considering our long history of considering these flows to be very unstable to forcing input. It is a phenomenon not described in modern fluid dynamic text books. The forcing required to achieve this effect (which we will call turbulent shear layer stabilization) is of a much higher amplitude and frequency than the more traditional type of shear layer flow control effect seen in the literature (which we will call turbulent shear layer destabilization). A numerical study is undertaken to investigate the effect of frequency of pulsed mass injection on the nature of stabilization, destabilization and acoustic suppression in high speed cavity flows. An implicit, 2nd-order in space and time flow solver, coupled with a recently developed hybrid RANS-LES (Reynolds Averaged Navier Stokes-Large Eddy Simulation) turbulence model by Nichols and Nelson [Nichols RH Nelson CC. Weapons bay acoustic predictions using a multi-scale turbulence model. In: Proceedings of the ITEA 2001 aircraft-stores compatibility symposium, March 2001], is utilized in a Chimera-based parallel format. This tool is used to numerically simulate both an unsuppressed cavity in resonance, as well as the effect of mass-addition pulsed jet flow control on cavity flow physics and ultimately, cavity acoustic levels. Frequency (and in a limited number of cases, amplitude) of pulse is varied, from 0 Hz (steady) up to 5000 Hz. The change in the character of the flow control effect as pulsing frequency is changed is described, and linked to changes in acoustic levels. Limited comparison to 1/10th scale experiments is presented. The observed local stabilization of the cavity turbulent shear layer, when subjected to high frequency pulsed blowing, is shown in simulation to be the result of a violent instability and breakdown of a pair of opposite sign vortical structures created with each high frequency "pulse". This unique shear layer stabilization behavior is only observed in simulation above a certain critical pulsing frequency. Below this critical frequency, pulsing is shown in simulation to provide little benefit with respect to suppression of high cavity acoustic levels. (C) 2007 Published by Elsevier Ltd.
C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
Univ Cincinnati, Cincinnati, OH USA.
RP Stanek, MJ (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM Michael.Stanek@wpafb.af.mil
NR 39
TC 10
Z9 12
U1 1
U2 6
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0045-7930
J9 COMPUT FLUIDS
JI Comput. Fluids
PD DEC
PY 2007
VL 36
IS 10
BP 1621
EP 1637
DI 10.1016/j.compfluid.2007.03.011
PG 17
WC Computer Science, Interdisciplinary Applications; Mechanics
SC Computer Science; Mechanics
GA 227XB
UT WOS:000250690000010
ER
PT J
AU Durham, ME
Fallot, A
Podberesky, D
Spinella, P
AF Durham, Megan E.
Fallot, Andre
Podberesky, Daniel
Spinella, Philip
TI The effect of flexible bronchoscopy and pulmozyme on pediatric patients
during extra-corporeal membrane oxygenation
SO CRITICAL CARE MEDICINE
LA English
DT Meeting Abstract
CT 37th Critical Care Congress of the Society-of-Critical-Care-Medicine
CY FEB 02-08, 2008
CL Honolulu, HI
SP Soc Crit Care Med
C1 [Durham, Megan E.; Fallot, Andre; Podberesky, Daniel; Spinella, Philip] Wilford Hall USAF Med Ctr, San Antonio, TX 78236 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 0090-3493
J9 CRIT CARE MED
JI Crit. Care Med.
PD DEC
PY 2007
VL 35
IS 12
SU S
MA 837
BP A232
EP A232
PG 1
WC Critical Care Medicine
SC General & Internal Medicine
GA 237TI
UT WOS:000251398901310
ER
PT J
AU Matos, RI
Spinella, PC
AF Matos, Renee I.
Spinella, Phillip C.
TI Comparison of mortality in children and adults at a US Military Hospital
in Iraq
SO CRITICAL CARE MEDICINE
LA English
DT Meeting Abstract
CT 37th Critical Care Congress of the Society-of-Critical-Care-Medicine
CY FEB 02-08, 2008
CL Honolulu, HI
SP Soc Crit Care Med
C1 [Matos, Renee I.] Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
[Spinella, Phillip C.] Childrens Med Ctr, Hartford, CT USA.
NR 0
TC 2
Z9 2
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0090-3493
J9 CRIT CARE MED
JI Crit. Care Med.
PD DEC
PY 2007
VL 35
IS 12
SU S
MA 564
BP A156
EP A156
PG 1
WC Critical Care Medicine
SC General & Internal Medicine
GA 237TI
UT WOS:000251398901045
ER
PT J
AU Yun, HC
Ellis, MW
Jorgensen, JH
AF Yun, Heather C.
Ellis, Michael W.
Jorgensen, James H.
TI Activity of ceftobiprole against community-associated
methicillin-resistant Staphylococcus aureus isolates recently recovered
from US military trainees
SO DIAGNOSTIC MICROBIOLOGY AND INFECTIOUS DISEASE
LA English
DT Article
DE ceftobiprole; MRSA; CA-MRSA; military
ID BROAD-SPECTRUM CEPHALOSPORIN; IN-VIVO; BETA-LACTAMS; VANCOMYCIN;
INFECTION; COLONIZATION; ENDOCARDITIS; TIGECYCLINE; DAPTOMYCIN;
RO-63-9141
AB Ceftobiprole MICs at which 50% and 90% of isolates were inhibited (MIC50 and MIC90), determined by the Clinical and Laboratory Standards Institute broth microdilution method, were both 1 mu g/mL (range, 0.5-1 mu g/mL) against 143 community-associated methicillin-resistant Staphylococcus aureus isolates and 0.5 mu g/mL (range, 0.25-0.5 mu g/mL) with 29 methicillin-susceptible isolates recovered from military trainees during 2 prospective investigations. (c) 2007 Elsevier Inc. All rights reserved.
C1 [Yun, Heather C.; Ellis, Michael W.] Brooke Army Med Ctr, MCHE MDI, Infect Dis Serv, Dept Med Infect Dis, Ft Sam Houston, TX 78234 USA.
[Yun, Heather C.] Wilford Hall USAF Med Ctr, Dept Infect Dis, Lackland AFB, TX 78236 USA.
[Jorgensen, James H.] Univ Texas Hlth Sci Ctr San Antonio, Dept Pathol, San Antonio, TX 78229 USA.
RP Yun, HC (reprint author), Brooke Army Med Ctr, MCHE MDI, Infect Dis Serv, Dept Med Infect Dis, Ft Sam Houston, TX 78234 USA.
EM heather.yun@amedd.army.mil
NR 32
TC 10
Z9 11
U1 0
U2 1
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0732-8893
J9 DIAGN MICR INFEC DIS
JI Diagn. Microbiol. Infect. Dis.
PD DEC
PY 2007
VL 59
IS 4
BP 463
EP 466
DI 10.1016/j.diagmicrobio.2007.06.023
PG 4
WC Infectious Diseases; Microbiology
SC Infectious Diseases; Microbiology
GA 243PK
UT WOS:000251809600018
PM 17911001
ER
PT J
AU Schrand, AM
Dai, L
Schlager, JJ
Hussain, SM
Osawa, E
AF Schrand, Amanda M.
Dai, Liming
Schlager, John J.
Hussain, Saber M.
Osawa, Eiji
TI Differential biocompatibility of carbon nanotubes and nanodiamonds
SO DIAMOND AND RELATED MATERIALS
LA English
DT Article; Proceedings Paper
CT Joint International Conference on Nanocarbon and Nanodiamond 2006
CY SEP 11-15, 2006
CL St Petersburg, RUSSIA
SP RAS, Ioffe Physico Tech Inst, St Petersburg Inst Technol, Fed State Unitary Enterprise
DE carbon nanomaterials; cell culture; viability; MTT; MMP; ROS
ID IN-VITRO CYTOTOXICITY; CELLULAR TOXICITY; DIAMOND SURFACES;
NANOPARTICLES; CELLS; RAT; IMMOBILIZATION; NANOMATERIALS; ANTIOXIDANTS;
MACROPHAGES
AB Carbon nanomaterials are being produced in increasingly larger quantities for many applications due to their novel characteristics such as enhanced thermal, electrical, mechanical, and biological properties. However, there is a lack of data on biological interactions to assess their biocompatibility before they will be accepted as non-toxic in industrial or biomedical arenas. In the present study, we examined both neuronal and lung cell lines for biocompatibility in aqueous suspensions of carbon nanomaterials, such as nanodiamonds (NDs), single- and multi-walled carbon nanotubes (SWNTs, MWNTs), and carbon black (CB), at concentrations ranging from 25-100 mu g/ml for 24 h. Our results indicated that these carbon nanomaterials displayed differential biocompatibility in these two different cell lines. The greatest biocompatibility was found after incubation with NDs and both cell types followed the trend: ND>CB>MWNT>SWNT. Macrophages were found to be more sensitive to the nanomaterials with up to five times the generation of reactive oxygen species after incubation with MWNTs or SWNTs. However, there was a lack of ROS generation from either cell line incubated with ND-raw, as well as intact mitochondrial membranes, suggesting that NDs may be useful as a benchmark nanoparticle non-toxic control in replacement of CB, and should be further investigated for use in medical applications. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Schrand, Amanda M.; Dai, Liming] Univ Dayton, Dept Chem & Mat Engn, Dayton, OH 45469 USA.
[Schlager, John J.; Hussain, Saber M.] USAF, Res Lab, Human Effectiveness Directorate, Appl Biotechnol Branch, Wright Patterson AFB, OH 45433 USA.
[Osawa, Eiji] Nanocarbon Res Inst Ltd, Kashiwa, Chiba 2770882, Japan.
RP Dai, L (reprint author), Univ Dayton, Dept Chem & Mat Engn, 300 Coll Pk, Dayton, OH 45469 USA.
EM ldai@udayton.edu; saber.hussain@wpafb.af.mil
NR 41
TC 174
Z9 185
U1 3
U2 31
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-9635
EI 1879-0062
J9 DIAM RELAT MATER
JI Diam. Relat. Mat.
PD DEC
PY 2007
VL 16
IS 12
BP 2118
EP 2123
DI 10.1016/j.diamond.2007.07.020
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA 245TJ
UT WOS:000251961400027
ER
PT J
AU Burton, AC
Carson, KS
Chilton, SM
Hutchinson, WG
AF Burton, Anthony C.
Carson, Katherine S.
Chilton, Susan M.
Hutchinson, W. George
TI Resolving questions about bias in real and hypothetical referenda
SO ENVIRONMENTAL & RESOURCE ECONOMICS
LA English
DT Article
DE experimental economics; real referenda; hypothetical referenda; demand
revelation; hypothetical bias; non-market valuation
ID CONTINGENT VALUATION METHOD; TESTS
AB Despite 10 years of research on behavior in hypothetical referenda, conflict remains in the literature on whether or not the mechanism generates biased responses compared to real referenda, and the nature and source of any such bias. Almost all previous inquiry in respect of this issue has concentrated on bias at the aggregate level. This paper reports a series of three experiments which focuses on bias at the individual level and how this can translate to bias at the aggregate level. The authors argue that only an individual approach to hypothetical bias is consistent with the concept of incentive compatibility. The results of these experiments reflect these previous conflicting findings but go on to show that individual hypothetical bias is a robust result driven by the differing influence of pure self-interest and other-regarding preferences in real and hypothetical situations, rather than by a single behavioral theory such as free riding. In a hypothetical situation these preferences cause yea-saying and non-demand revealing voting. This suggests that investigation of individual respondents in other hypothetical one-shot binary choices may also provide us with insights into aggregate behavior in these situations.
C1 Queens Univ Belfast, Gibson Inst, Belfast BT9 5AG, Antrim, North Ireland.
Dept Hlth, London SE1 6TE, England.
USAF Acad, Dept Econ & Geog, Colorado Springs, CO 80840 USA.
Univ Newcastle Upon Tyne, Sch Business, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England.
RP Hutchinson, WG (reprint author), Queens Univ Belfast, Gibson Inst, Room 1209,David Keir Bldg,Stranmillis Rf, Belfast BT9 5AG, Antrim, North Ireland.
EM Kate.Carson@usafa.af.mil; G.Hutchinson@qub.ac.uk
OI Silz Carson, Katherine/0000-0002-2446-1368; Hutchinson, W
George/0000-0003-0028-7868
NR 14
TC 15
Z9 15
U1 4
U2 11
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0924-6460
J9 ENVIRON RESOUR ECON
JI Environ. Resour. Econ.
PD DEC
PY 2007
VL 38
IS 4
BP 513
EP 525
DI 10.1007/s10640-007-9095-6
PG 13
WC Economics; Environmental Studies
SC Business & Economics; Environmental Sciences & Ecology
GA 230NC
UT WOS:000250882200006
ER
PT J
AU Wilson, GF
Russell, CA
AF Wilson, Glenn F.
Russell, Christopher A.
TI Performance enhancement in an uninhabited air vehicle task using
psychophysiologically determined adaptive aiding
SO HUMAN FACTORS
LA English
DT Article
ID MENTAL WORKLOAD; WORKING-MEMORY; TRAFFIC-CONTROL; EEG INDEXES;
AUTOMATION; SYSTEM; FLIGHT; ALLOCATION; DIFFICULTY; PILOTS
AB Objective: We show that psychophysiologically driven real-time adaptive aiding significantly enhances performance in a complex aviation task. A further goal was to assess the importance of individual operator capabilities when providing adaptive aiding. Background: Psychophysiological measures are useful for monitoring cognitive workload in laboratory and real-world settings. They can be recorded without intruding into task performance and can be analyzed in real time, making them candidates for providing operator functional state estimates. These estimates could be used to determine if and when system intervention should be provided to assist the operator to improve system performance. Methods: Adaptive automation was implemented while operators performed an uninhabited aerial vehicle task. Psychophysiological data were collected and an artificial neural network was used to detect periods of high and low mental workload in real time. The high-difficulty task levels used to initiate the adaptive automation were determined separately for each operator, and a group-derived mean difficulty level was also used. Results: Psychophysiologically determined aiding significantly improved performance when compared with the no-aiding conditions. Improvement was greater when adaptive aiding was provided based on individualized criteria rather than on group-derived criteria. The improvements were significantly greater than when the aiding was randomly provided. Conclusion: These results show that psychophysiologically determined operator functional state assessment in real time led to performance improvement when included in closed loop adaptive automation with a complex task. Application: Potential future applications of this research include enhanced workstations using adaptive aiding that would be driven by operator functional state.
C1 Air Force Res Lab, Wright Patterson AFB, OH USA.
RP Wilson, GF (reprint author), Physiometrex, 2845 Poplar Dr, Springfield, OH 45504 USA.
EM glennwilson@woh.rr.com
NR 41
TC 84
Z9 86
U1 3
U2 17
PU HUMAN FACTORS SOC
PI SANTA MONICA
PA BOX 1369, SANTA MONICA, CA 90406 USA
SN 0018-7208
J9 HUM FACTORS
JI Hum. Factors
PD DEC
PY 2007
VL 49
IS 6
BP 1005
EP 1018
DI 10.1518/001872007X249875
PG 14
WC Behavioral Sciences; Engineering, Industrial; Ergonomics; Psychology,
Applied; Psychology
SC Behavioral Sciences; Engineering; Psychology
GA 232UC
UT WOS:000251044200004
PM 18074700
ER
PT J
AU Ebel, JL
Hyman, DJ
Newman, HS
AF Ebel, John L.
Hyman, Daniel J.
Newman, Harvey S.
TI RF MEMS testing - Beyond the S-parameters
SO IEEE MICROWAVE MAGAZINE
LA English
DT Article
ID SWITCHES; VOLTAGE; TIME
C1 [Ebel, John L.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Hyman, Daniel J.] XCOM Wireless Inc, Signal Hill, CA USA.
[Newman, Harvey S.] Naval Res Lab, Washington, DC USA.
RP Ebel, JL (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM john.ebel@wpafb.at.mil
NR 23
TC 6
Z9 6
U1 0
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1527-3342
J9 IEEE MICROW MAG
JI IEEE Microw. Mag.
PD DEC
PY 2007
VL 8
IS 6
BP 76
EP 88
DI 10.1109/MMM.2007.907737
PG 13
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 245YN
UT WOS:000251974800015
ER
PT J
AU Kim, KT
AF Kim, Kristopher T.
TI Efficient recursive generation of the scalar spherical multipole
translation matrix
SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
LA English
DT Article
DE antenna theory; efficient computation; recursive relations; scattering;
spherical multipole fields; translation matrix
ID RECURRENCE RELATIONS; COEFFICIENTS; SCATTERERS
AB New efficient recursive procedures for generating the translation matrix of the scalar spherical multipole field are describd. They are based on a new set of recurrence relations that result when the angular-momentum operator is applied to the spherical multipole field. Their efficiency and accuracy are compared analytically and through a computer experiment with those of the brute-force method and an existing recursive procedure.
C1 [Kim, Kristopher T.] AF Res Lab, Sensors Directorate, Electromagnet Scattering Branch, Hanscom AFB, MA 01731 USA.
RP Kim, KT (reprint author), AF Res Lab, Sensors Directorate, Electromagnet Scattering Branch, Hanscom AFB, MA 01731 USA.
EM trout@ieee.org
NR 16
TC 1
Z9 1
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-926X
J9 IEEE T ANTENN PROPAG
JI IEEE Trans. Antennas Propag.
PD DEC
PY 2007
VL 55
IS 12
BP 3484
EP 3494
DI 10.1109/TAP.2007.910358
PG 11
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 240XC
UT WOS:000251620500013
ER
PT J
AU Fontanari, JF
Perlovsky, LI
AF Fontanari, Jose Fernando
Perlovsky, Leonid I.
TI Evolving compositionality in evolutionary language games
SO IEEE TRANSACTIONS ON EVOLUTIONARY COMPUTATION
LA English
DT Article
DE complexity theory; game theory; genetic algorithms; simulation
ID UNIVERSAL GRAMMAR; COMMUNICATION; SYNTAX
AB Evolutionary language games have proved a useful tool to study the evolution of communication codes in communities of agents that interact among themselves by transmitting and interpreting a fixed repertoire of signals. Most studies have focused on the emergence of Saussurean codes (i.e., codes characterized by an arbitrary one-to-one correspondence between meanings and signals). In this contribution, we argue that the standard evolutionary language game framework cannot explain the emergence of compositional codes-communication codes that preserve neighborhood relationships by mapping similar signals into similar meanings-even though use of those codes would result in a much higher payoff in the case that signals are noisy. We introduce an alternative evolutionary setting in which the meanings are assimilated sequentially and show that the gradual building of the meaning-signal mapping leads to the emergence of mappings with the desired compositional property.
C1 Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil.
Harvard Univ, Cambridge, MA 02138 USA.
USAF, Res Lab, Bedford, MA 01731 USA.
RP Fontanari, JF (reprint author), Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil.
EM fontanari@ifsc.usp.br; Leonid.Perlovsky@hanscom.af.mil
RI Fontanari, Jose/A-4511-2008; Sao Carlos Institute of Physics,
IFSC/USP/M-2664-2016
OI Fontanari, Jose/0000-0001-9413-1922;
NR 45
TC 26
Z9 26
U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1089-778X
J9 IEEE T EVOLUT COMPUT
JI IEEE Trans. Evol. Comput.
PD DEC
PY 2007
VL 11
IS 6
BP 758
EP 769
DI 10.1109/TEVC.2007.892763
PG 12
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA 237LY
UT WOS:000251376600005
ER
PT J
AU McClory, JW
Petrosky, JC
Sattler, JA
Jarzen, TA
AF McClory, John W.
Petrosky, James C.
Sattler, James A.
Jarzen, Thomas A.
TI An analysis of the effects of low-energy electron irradiation of
AlGaN/GaN HFETs
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT 44th Annual IEEE International Nuclear and Space Radiation Effects
Conference
CY JUL 23-27, 2007
CL Waikiki Beach, HI
SP IEEE
DE electron irradiation; gallium nitride; heterojunction field effect
transistors
ID FIELD-EFFECT TRANSISTORS; MOBILITY TRANSISTORS; PROTON; GAN; RADIATION
AB The effects of low energy (0.45 MeV) electron radiation on the gate and drain currents of Al0.27Ga0.73N/GaN HFETs are investigated using IV and CV measurements. Following irradiation, the gate and drain currents increase at low temperatures and reach a saturation level. The gate leakage currents do not fully account for the drain current increase. Following a room temperature anneal, the gate and drain currents return to pre-irradiation levels. These results are explained by the buildup of positive charge in the AlGaN layer at low temperature and traps formed via a complexing precursor in the AlGaN layer near the interface. The positive charge increases the carrier concentration in the 2DEG and hence the drain current. The traps act as trap-assisted-tunneling centers that increase the gate leakage current.
C1 [McClory, John W.; Petrosky, James C.] USAF, Inst Technol, Wright Patterson AFB, OH 45322 USA.
[Sattler, James A.] USAF, Res Lab, Sensors Directorate, Hanscom Afb, MA 01731 USA.
[Jarzen, Thomas A.] Def Threat Reduct Agcy, Ft Belvoir, VA 22060 USA.
RP McClory, JW (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45322 USA.
EM john.mcclory@afit.edu; james.petrosky@afit.edu;
James.Sattler@hanscom.af.mil; thomas.jarzen@us.army.mil
OI McClory, John/0000-0002-4303-2729
NR 23
TC 11
Z9 15
U1 0
U2 12
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2007
VL 54
IS 6
BP 1946
EP 1952
DI 10.1109/TNS.2007.910121
PN 1
PG 7
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 242RV
UT WOS:000251744300014
ER
PT J
AU McClory, JW
Petrosky, JC
AF McClory, John W.
Petrosky, James C.
TI Temperature dependent electrical characteristics of neutron irradiated
AlGaN/GaN HFETs
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT 44th Annual IEEE International Nuclear and Space Radiation Effects
Conference
CY JUL 23-27, 2007
CL Waikiki Beach, HI
SP IEEE
DE gallium nitride; heterostructure field effect transistor (HFET); high
electron mobility transistor (HEMT); neutron radiation effects
ID MOBILITY TRANSISTORS
AB Low temperature neutron irradiated Al0.27Ga0.73N/GaN heterostructures reveal a complex temperature dependent displacement damage formation process. This process results in differences in drain currents at low (80 K) versus high (294 K) temperatures. Irradiation increases the gate and drain currents at 80 K, and decreases the drain current at room temperature. These effects saturate at similar to 3 x 10(10) n/cm(2) indicating complexing with a native impurity. After a room temperature anneal, the effect on the gate current persists and the drain current partially recovers. A two-step persistent interface trap formation model is presented that explains these results. This model is further supported by CV measurements at 80 K and 294 K after annealing.
C1 [McClory, John W.; Petrosky, James C.] USAF, Inst Technol, Wright Patterson AFB, OH 45322 USA.
EM john.mcclory@afit.edu; james.petrosky@afit.edu
OI McClory, John/0000-0002-4303-2729
NR 14
TC 13
Z9 16
U1 2
U2 16
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2007
VL 54
IS 6
BP 1969
EP 1974
DI 10.1109/TNS.2007.910852
PN 1
PG 6
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 242RV
UT WOS:000251744300017
ER
PT J
AU Ginet, GP
Dichter, BK
Brautigam, DH
Madden, D
AF Ginet, Gregory P.
Dichter, Bronislaw K.
Brautigam, Donald H.
Madden, Dan
TI Proton flux anisotropy in low Earth orbit
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT 44th Annual IEEE International Nuclear and Space Radiation Effects
Conference
CY JUL 23-27, 2007
CL Waikiki Beach, HI
SP IEEE
DE radiation belts; radiation effects; South Atlantic Anomaly
ID GEOMAGNETICALLY TRAPPED PROTONS
AB Proton flux anisotropy as a function of altitude in the South Atlantic Anomaly is investigated using data from the Compact Environment Anomaly Sensor (CEASE) flown onboard the Tri-Service Experiment-5 (TSX-5) satellite from June 2000 to July 2006. In a 410 km x 1710 km, 69 degree inclination orbit, TSX-5 spanned a broad range of the low Earth orbit regime. Using measurements of total dose, integral energy flux > 40 MeV and the differential flux at 40 MeV sorted into 3 degree latitude x 3 degree longitude x 50 km altitide bins and averaged over the entire mission, the components arising from eastward and westward traveling protons have been determined in areas of the SAA where CEASE detection efficiency is not compromised. For the first time, ratios of these components have been compared to predictions of East-West effect models above 400 km. There is good agreement in general with the anisotropy becoming apparent at approximately 1200 km (moving down) and increasing rapidly starting at approximately 1000 km, the magnitude and rate depending on location within the anomaly. Measurements of the differential flux at 40 MeV are compared to predictions of standard radiation belt models as a function of altitude and found to be substantially higher in magnitude than AP8, though a comprehensive survey has not yet been performed.
C1 [Ginet, Gregory P.; Dichter, Bronislaw K.; Brautigam, Donald H.] USAF, Res Lab, Space Vehicles Directorate, Hanscom Afb, MA 01731 USA.
[Madden, Dan] Boston Coll, Inst Sci Res, Boston, MA 02467 USA.
RP Ginet, GP (reprint author), USAF, Res Lab, Space Vehicles Directorate, Hanscom Afb, MA 01731 USA.
EM afrl.rvb.pa@hanscom.af.mil; dichter@assurtech.com;
afrl.rvb.pa@hanscom.af.mil
NR 18
TC 7
Z9 7
U1 1
U2 7
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2007
VL 54
IS 6
BP 1975
EP 1980
DI 10.1109/TNS.2007.910041
PN 1
PG 6
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 242RV
UT WOS:000251744300018
ER
PT J
AU Krause, LH
Cooke, DL
Enloe, CL
Font, GI
Lai, ST
McHarg, MG
Putz, V
AF Krause, Linda Habash
Cooke, David L.
Enloe, C. L.
Font, Gabriel I.
Lai, Shu T.
McHarg, M. G.
Putz, Victor
TI Bootstrap surface charging at GEO: Modeling and on-orbit observations
from the DSCS-III B7 satellite
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT 44th Annual IEEE International Nuclear and Space Radiation Effects
Conference
CY JUL 23-27, 2007
CL Waikiki Beach, HI
SP IEEE
DE bootstrap charging; Defense Satellite Communication System (DSCS-III);
differential charging; GEO satellite charging; spacecraft surface
charging
ID SPACECRAFT
AB We present an analysis of the charging interactivity between surrounding surface materials aboard a spacecraft at geosynchronous altitudes. In particular, bootstrap charging of a small surface may occur if is surrounded by a large negatively charged surface. Here, a negative potential barrier forms above the small surface, resulting in suppression of photo- and secondary electron emission from that surface. Additionally, the small surface experiences an enhancement of the collection of the photo-and secondary electrons emitted from the surrounding surface. This mechanism results in the charging of the small surface to higher levels than that of the patch in isolation, and in many cases the final potential will reach that of the potential of the larger surrounding surface. With this study we examine bootstrap charging behavior with model data and with data collected on orbit. We have modeled the DSCS-III B7 geosynchronous satellite with realistic geometry and spacecraft materials. Additionally a previous study has shown that bootstrap charging has been observed on the DSCS-III B7 geosynchronous spacecraft. Both Astroquartz and Kapton cloth patches charged up to the frame potential of the satellite during periods of severe frame charging. The results of modeling bootstrap charging of a small Kapton patch floating relative to the DSCS-III frame fixed at a potential of -1,000 V show that the patch will indeed charge up negatively to match the frame potential, with the temporal increase in negative potential following an exponential time characteristic.
C1 [Krause, Linda Habash; Enloe, C. L.; Font, Gabriel I.; McHarg, M. G.] USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
[Cooke, David L.; Lai, Shu T.] USAF, Res Lab, Hanscom Afb, MA 01731 USA.
[Putz, Victor] Univ Oxford, Oxford OX1 2JD, England.
RP Krause, LH (reprint author), USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
EM Linda.Krause@usafa.af.mil
NR 6
TC 1
Z9 1
U1 0
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2007
VL 54
IS 6
BP 1997
EP 2003
DI 10.1109/TNS.2007.909911
PN 1
PG 7
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 242RV
UT WOS:000251744300022
ER
PT J
AU Morton, YT
Miller, M
Tsui, J
Lin, D
Zhou, QH
AF Morton, Yu T.
Miller, Mikel
Tsui, James
Lin, David
Zhou, Qihou
TI GPS civil signal self-interference mitigation during weak signal
acquisition
SO IEEE TRANSACTIONS ON SIGNAL PROCESSING
LA English
DT Article
DE global positioning system (GPS) receiver; partitioned subspace
projection; self-interference mitigation; weak signal acquisition
ID CANCELLATION
AB Current global positioning system receivers, can acquire weak satellite signals with C/N-0 = 15 dB/Hz if there is no self-interference from other strong satellite signals. This correspondence presents a computational efficient partitioned subspace projection method to mitigate the self-interference. The method is evaluated using simulated signals and a block-based weak signal acquisition algorithm.
C1 Miami Univ, Dept Elect & Comp Engn, Oxford, OH 45056 USA.
USAF, Res Lab, Eglin AFB, FL 32542 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Morton, YT (reprint author), Miami Univ, Dept Elect & Comp Engn, Oxford, OH 45056 USA.
EM mortonyt@muohio.edu; mikel.miller@eglin.af.mil; James.Tsui@wpafb.af.mil;
david.lin@wpafb.af.mil; zhouq@muohio.edu
NR 14
TC 21
Z9 25
U1 2
U2 7
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1053-587X
J9 IEEE T SIGNAL PROCES
JI IEEE Trans. Signal Process.
PD DEC
PY 2007
VL 55
IS 12
BP 5859
EP 5863
DI 10.1109/TSP.2007.900761
PG 5
WC Engineering, Electrical & Electronic
SC Engineering
GA 238OH
UT WOS:000251456600027
ER
PT J
AU Savona, MR
Dela Cruz, WP
Thornton, JA
Danaher, PJ
AF Savona, Michael R.
Dela Cruz, Wilfred P.
Thornton, Jennifer A.
Danaher, Patrick J.
TI Comparison of a semipermeable dressing bonded to an absorbent pad and a
semipermeable dressing over a separate gauze pad for containment of
vaccinia virus at the vaccination site
SO INFECTION CONTROL AND HOSPITAL EPIDEMIOLOGY
LA English
DT Article
ID SMALLPOX VACCINATION; TRIAL
AB OBJECTIVE. To compare the ability of 2 types of dressings to contain vaccinia virus after smallpox vaccination.
DESIGN. Prospective, nonrandomized trial.
SETTING. The smallpox vaccination clinic in a medium-sized military hospital.
PARTICIPANTS. Ninety-seven active-duty military members who received smallpox vaccination in accordance with US Department of Defense and Centers for Disease Control and Prevention guidelines.
METHODS. The first 40 participants enrolled were instructed to cover their vaccination sites with a semipermeable membrane placed over a separate gauze pad, and the subsequent 57 participants were given a semipermeable membrane bonded to an absorbent pad. Swab samples of the external surface of the dressing were collected 7 and 21 days after vaccination. Real-time quantitative polymerase chain reaction was used to detect vaccinia DNA in the samples.
RESULTS. The rate of vaccinia DNA detection was significantly higher for samples obtained from vaccinees who were using the separate gauze and semipermeable membrane, compared with the vacinees who were using the gauze-impregnated semipermeable membrane (22% vs 2.2%;; odds ratio, 12.3 [95% confidence interval, 1.4-567.4]).
CONCLUSION. A gauze-impregnated semipermeable membrane more effectively reduced viral passage to the external surface of the dressing than did a semipermeable membrane placed over a separate gauze pad. Routine use of such dressings following smallpox vaccination might reduce the incidence of autoinoculation and secondary transmission.
C1 Univ Michigan, Dept Internal Med, Div Hematol & Oncol, Ann Arbor, MI 48109 USA.
USAF, Med Ctr, Clin Invest Facil, Travis Air Force Base, Eglin AFB, FL 32542 USA.
Eglin USAF, Dept Infect Dis, Reg Hosp, Eglin AFB, FL USA.
RP Danaher, PJ (reprint author), USAF, Med Ctr, Clin Invest Facil, Travis Air Force Base, 96 MDG-96 MDOS SGOMI,307 Boatner Rd,Suite 114, Eglin AFB, FL 32542 USA.
EM patrick.danaher@eglin.af.mil
OI Delacruz, Wilfred/0000-0001-5363-6975
NR 19
TC 1
Z9 1
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0899-823X
J9 INFECT CONT HOSP EP
JI Infect. Control Hosp. Epidemiol.
PD DEC
PY 2007
VL 28
IS 12
BP 1339
EP 1343
DI 10.1086/523277
PG 5
WC Public, Environmental & Occupational Health; Infectious Diseases
SC Public, Environmental & Occupational Health; Infectious Diseases
GA 226VG
UT WOS:000250616000006
PM 17952843
ER
PT J
AU Lanning, DB
Nicholas, T
AF Lanning, David B.
Nicholas, Theodore
TI Constant-life diagram modified for notch plasticity
SO INTERNATIONAL JOURNAL OF FATIGUE
LA English
DT Article
DE high cycle fatigue; notches; plasticity; Haigh diagram; Ti-6Al-4V
ID HIGH-CYCLE FATIGUE; STRESS; TI-6AL-4V
AB A modified constant-life Haigh diagram has been formulated to account for plasticity occurring at stress concentrations under cyclic loading at sufficiently high stress ratios. The notch plasticity is assumed to occur within a range of elastic stress concentration factors, k(t), and cycles to failure, N-f, such that plastic straining occurs only during the first cycle of constant-amplitude cycling and straining remains elastic thereafter. This condition is expected to occur in high cycle fatigue at stress concentrations of moderate k(t) loaded at high stress ratio. The validity of the model is assessed by means of fatigue data from Ti-6Al-4V notched specimens having a range of k(t). The model, purposely kept simple for ease of use as a design tool, is found to capture trends in the fatigue data not predicted using traditional straight-line models on a mean stress versus alternating stress constant-life plot. (C) 2007 Elsevier Ltd. All rights reserved.
C1 Embry Riddle Aeronaut Univ, Coll Engn, Prescott, AZ 86301 USA.
USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Lanning, DB (reprint author), Embry Riddle Aeronaut Univ, Coll Engn, 3700 Willow Creek Rd, Prescott, AZ 86301 USA.
EM lannind@erau.edu
NR 12
TC 2
Z9 2
U1 0
U2 2
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0142-1123
J9 INT J FATIGUE
JI Int. J. Fatigue
PD DEC
PY 2007
VL 29
IS 12
BP 2163
EP 2169
DI 10.1016/j.ijfatigue.2006.12.014
PG 7
WC Engineering, Mechanical; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA 238QA
UT WOS:000251461100008
ER
PT J
AU Gai, Y
Carney, LH
Abrams, KS
Idrobo, F
Harrison, JM
Gilkey, RH
AF Gai, Yan
Carney, Laurel H.
Abrams, Kristina S.
Idrobo, Fabio
Harrison, J. Michael
Gilkey, Robert H.
TI Detection of tones in reproducible noise maskers by rabbits and
comparison to detection by humans
SO JARO-JOURNAL OF THE ASSOCIATION FOR RESEARCH IN OTOLARYNGOLOGY
LA English
DT Article
DE energy; envelope; operant; bias; masking
ID AUDITORY-NERVE FIBERS; BINAURAL DETECTION; NARROW-BAND;
SIGNAL-DETECTION; PHENOMENOLOGICAL MODEL; RESPONSES; MASKING; FEATURES;
STIMULI; HEARING
AB Processing mechanisms used for detection of tones in noise can be revealed by using reproducible noise maskers and analyzing the pattern of results across masker waveforms. This study reports detection of a 500-Hz tone in broadband reproducible noise by rabbits using a set of masker waveforms for which human results are available. An appetitive-reinforcement, operant-conditioning procedure with bias control was used. Both fixed-level and roving-level noises were used to explore the utility of energy-related cues for detection. An energy-based detection model was able to partially explain the fixed-level results across reproducible noise waveforms for both rabbit and human. A multiple-channel energy model was able to explain fixed-level results, as well as the robust performance observed with roving-level noises. Further analysis using the energy model indicated a difference between species: human detection was influenced most by the noise spectrum surrounding the tone frequency, whereas rabbit detection was influenced most by the noise spectrum at frequencies above that of the tone. In addition, a temporal envelope-based model predicted detection by humans as well as the single-channel energy model did, but the envelope-based model failed to predict detection by rabbits. This result indicates that the contributions of energy and temporal cues to auditory processing differ across species. Overall, these findings suggest that caution must be used when evaluating neural encoding mechanisms in one species on the basis of behavioral results in another.
C1 Syracuse Univ, Dept Biomed & Chem Engn, Syracuse, NY 13244 USA.
Syracuse Univ, Inst Sensory Res, Syracuse, NY 13244 USA.
Syracuse Univ, Dept Elect Engn & Comp Sci, Syracuse, NY 13244 USA.
Boston Univ, Dept Psychol, Boston, MA 02215 USA.
USAF, Res Lab, Wright Patterson AFB, Human Effectiveness Directorate, Wright Patterson AFB, OH 45433 USA.
RP Carney, LH (reprint author), Univ Rochester, Dept Neurobiol & Anat, 601 Elmwood Ave,Box 603, Rochester, NY 14642 USA.
EM laurel_carney@urmc.rochester.edu
FU NIDCD NIH HHS [R01 DC001641, DC01641, R01 DC001641-17]
NR 38
TC 3
Z9 3
U1 0
U2 4
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 1525-3961
J9 JARO-J ASSOC RES OTO
JI JARO
PD DEC
PY 2007
VL 8
IS 4
BP 522
EP 538
DI 10.1007/s10162-007-0096-5
PG 17
WC Neurosciences; Otorhinolaryngology
SC Neurosciences & Neurology; Otorhinolaryngology
GA 232MP
UT WOS:000251024100010
PM 17899269
ER
PT J
AU Carroll, MB
AF Carroll, Matthew B.
TI MELAS masquerading as a systemic vasculitis
SO JCR-JOURNAL OF CLINICAL RHEUMATOLOGY
LA English
DT Article
DE MELAS; systemic vasculitis; stroke-like events; encephalopathy; ragged
red fibers; headache; lactic acidosis
ID ALTERED MENTAL STATUS; STROKE-LIKE EPISODES; DISTURBED GAIT; SEIZURE;
DISEASE; WOMAN
AB Mitochondrial encephalomyopathy, lactic acidosis, and stroke (MELAS) is a mitochondrial genetic disorder caused by a point mutation, resulting in the substitution of guanine for adenine at nucleotide 3243 (A3243G). It is a multisystem disorder with variable manifestations and typically presents between the first and third decades of life. It should be suspected if a patient exhibits stroke-like episodes before age 40, encephalopathy characterized by seizures, dementia, or both, and lactic acidosis, ragged-red fibers in muscle, or both. We present the case of a 26-year-old white man suspected with primary central nervous system vasculitis admitted to our facility with profound constipation from severe intestinal dysmotility. Although his gastrointestinal and neurologic symptoms did not meet criteria for a specific vasculitic syndrome, his symptoms and blood test abnormalities were concerning for such a process. MELAS was included in our differential diagnosis because his symptoms failed to fit a defined vasculitic process. When genetic testing documented the presence of the point mutation A3243G, his diagnosis was changed. This case illustrates the importance of considering a mitochondrial genetic disorder in the differential diagnosis of patients who present to Rheumatologists with suspected unusual or atypical vasculitic symptoms.
C1 [Carroll, Matthew B.] Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
RP Carroll, MB (reprint author), Keesler Med Ctr, 301 Fisher St, Keesler AFB, MS 39534 USA.
EM matthew.carroll@keesler.af.mil
NR 11
TC 5
Z9 8
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1076-1608
J9 JCR-J CLIN RHEUMATOL
JI JCR-J. Clin. Rheumatol.
PD DEC
PY 2007
VL 13
IS 6
BP 334
EP 337
DI 10.1097/REU.0b013e31815c2516
PG 4
WC Rheumatology
SC Rheumatology
GA 244AV
UT WOS:000251839300008
PM 18176143
ER
PT J
AU Merrill, J
Senft, DC
AF Merrill, John
Senft, Donna Cowell
TI Directions and materials challenges in high-performance photovoltaics
SO JOM
LA English
DT Article
ID THIN-FILM PHOTOVOLTAICS; SOLAR-CELLS; MULTIJUNCTION; EFFICIENCY
AB More efficient and higher performance photovoltaic solar cells continue to be developed for spacecraft power and are beginning to be developed for terrestrial concentrators. The need for high-efficiency and low-cost solar cells drives research into new materials and new materials applications. An overview of active areas of research into high-performance solar cells is presented in this article.
C1 USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87122 USA.
RP Merrill, J (reprint author), USAF, Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87122 USA.
EM AFRL.VSSV@kirtiand.af.mil
NR 27
TC 2
Z9 2
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 1047-4838
J9 JOM-US
JI JOM
PD DEC
PY 2007
VL 59
IS 12
BP 26
EP 30
DI 10.1007/s11837-007-0148-7
PG 5
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Mineralogy; Mining & Mineral Processing
SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy;
Mining & Mineral Processing
GA 237IW
UT WOS:000251368400004
ER
PT J
AU Hayes, TF
AF Hayes, Tammy Flo
TI Compassion around the world
SO JOURNAL OF EMERGENCY NURSING
LA English
DT Letter
C1 USAF, Robertsdale, AL 36567 USA.
RP Hayes, TF (reprint author), USAF, Robertsdale, AL 36567 USA.
EM ernurs2@hotmail.com
NR 0
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 0099-1767
J9 J EMERG NURS
JI J. Emerg. Nurs.
PD DEC
PY 2007
VL 33
IS 6
BP 527
EP 528
DI 10.1016/j.jen.2007.01.021
PG 2
WC Emergency Medicine; Nursing
SC Emergency Medicine; Nursing
GA 239BX
UT WOS:000251494200004
PM 18035165
ER
PT J
AU Ray, JJ
Kirkpatrick, TC
Rutledge, RE
AF Ray, Jarom J.
Kirkpatrick, Timothy C.
Rutledge, Richard E.
TI Cyclic fatigue of EndoSequence and K3 rotary files in a dynamic model
SO JOURNAL OF ENDODONTICS
LA English
DT Article
DE EndoSequence; fatigue; fracture; K3; rotary files
ID TITANIUM ENDODONTIC INSTRUMENTS; TORSIONAL PROPERTIES; CLINICAL-USE;
FRACTURE; FAILURE
AB The cyclic fatigue resistance of K3 and EndoSequence files was compared by rotating files against a highly polished surface inclined at 15 degrees to the horizontal. For each brand, files with a 25 tip in .04 and .06 taper and files with a 40 tip in .04 and .06 taper were tested at both 300 and 600 rpm. A 3-mm axial movement simulated a clinical pecking motion at 1 cycle per second. The number of rotations to failure was calculated and analyzed by using analysis of variance and Independent Student's t tests, with results confirmed by nonparametric Mann-Whitney U tests with a Bonferroni correction. At both 300 and 600 rpm, K3 files exhibited statistically significantly more cycles to fracture than their EndoSequence counterparts with the same tip size and taper. Scanning electron microscopy images demonstrated surface features consistent with fracture due to cyclic fatigue. In this model, file design appeared to be the most important determinant of cyclic fatigue resistance.
C1 [Ray, Jarom J.; Kirkpatrick, Timothy C.; Rutledge, Richard E.] Wilford Hall USAF Med Ctr, Dept Endodont, Dent Training Squadron SGDRN 59, Lackland AFB, TX 78236 USA.
RP Kirkpatrick, TC (reprint author), Wilford Hall USAF Med Ctr, Dept Endodont, Dent Training Squadron SGDRN 59, Endodont Residency,2450 Pepperrell St, Lackland AFB, TX 78236 USA.
EM Timothy.Kirkpatrick@lackland.af.mil
NR 26
TC 18
Z9 21
U1 0
U2 2
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0099-2399
J9 J ENDODONT
JI J. Endod.
PD DEC
PY 2007
VL 33
IS 12
BP 1469
EP 1472
DI 10.1016/j.joen.2007.07.041
PG 4
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 240LS
UT WOS:000251589700018
PM 18037061
ER
PT J
AU Dalal, KM
Woo, Y
Galanis, C
Gonen, M
Tang, L
Allen, P
DeMatteo, R
Fong, Y
Coit, DG
AF Dalal, Kimberly Moore
Woo, Yanghee
Galanis, Charles
Gonen, Mithat
Tang, Laura
Allen, Peter
DeMatteo, Ronald
Fong, Yuman
Coit, Daniel G.
TI Detection of micrometastases in peritoneal washings of pancreatic cancer
patients by the reverse transcriptase polymerase chain reaction
SO JOURNAL OF GASTROINTESTINAL SURGERY
LA English
DT Article; Proceedings Paper
CT 48th Annual Meeting of the Society-for-Surgery-of-the-Alimentary-Tract
CY MAY 19-23, 2007
CL Washington, DC
SP Soc Surg Alimentary Tract
DE pancreatic cancer; peritoneal washings; cytology; micrometastases;
RT-PCR
ID DUCTAL ADENOCARCINOMA; CURATIVE RESECTION; GASTRIC-CARCINOMA; PROGNOSTIC
VALUE; CYTOLOGY; SURVIVAL; CELLS; DIAGNOSIS; AMPULLA; BILE
AB Objective: Pancreatic cancer patients with positive (+) peritoneal cytology have a prognosis similar to stage IV patients. We studied the ability of quantitative real time-polymerase chain reaction (RT-PCR) to detect micrometastases in patients undergoing staging laparoscopy.
Methods: Peritoneal washes were obtained prospectively from 35 consecutive patients with pancreatic adenocarcinoma undergoing staging laparoscopy and 16 patients undergoing laparoscopy for benign disease. Each sample was assessed by cytologic examination and RT-PCR analysis for tumor markers: CEA, CK7, Kras2, and MUC1. Markers and their combinations were evaluated on the basis of their deviance from the ideal marker.
Results: Pathologic stages for pancreatic cancer patients were: 1A-1 (3%), IB-1 (3%), IIA-5 (15%), IIB-13 (38%), III-5 (15%), IV-9 (26%). Eight patients were cytology (+) and stages IIA-1, IIB-2, IV-5. Twenty-five patients were RT-PCR (+). The optimal threshold for cycle amplification was 35 based on a receiver operating characteristic curve. CEA had the best profile of sensitivity, specificity, PPV, NPV, and the smallest deviance.
Conclusions: RT-PCR using a panel of tumor markers, including CEA, was comparable in sensitivity, specificity, PPV, and NPV to cytology. RT-PCR could represent a more sensitive method for detection of subclinical peritoneal tumor dissemination; this may be useful in patient selection for operative management and clinical trials.
C1 Mem Sloan Kettering Canc Ctr, Dept Surg, New York, NY 10021 USA.
USAF, David Grant Med Ctr, Dept Surg, Travis AFB, CA USA.
Mem Sloan Kettering Canc Ctr, Dept Pathol, New York, NY 10021 USA.
Mem Sloan Kettering Canc Ctr, Dept Epidemiol & Biostat, New York, NY 10021 USA.
RP Coit, DG (reprint author), Mem Sloan Kettering Canc Ctr, Dept Surg, 1275 York Ave, New York, NY 10021 USA.
EM coitd@mskcc.org
RI Gonen, Mithat/E-4826-2012
NR 16
TC 7
Z9 8
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 1091-255X
J9 J GASTROINTEST SURG
JI J. Gastrointest. Surg.
PD DEC
PY 2007
VL 11
IS 12
BP 1598
EP 1605
DI 10.1007/s11605-007-0283-z
PG 8
WC Gastroenterology & Hepatology; Surgery
SC Gastroenterology & Hepatology; Surgery
GA 231BW
UT WOS:000250922500004
PM 17879123
ER
PT J
AU Soref, R
Kouvetakis, J
Tolle, J
Menendez, J
D'Costa, V
AF Soref, Richard
Kouvetakis, John
Tolle, John
Menendez, Jose
D'Costa, Vijay
TI Advances in SiGeSn technology
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID GROUP-IV SEMICONDUCTORS; BAND-GAP; ALLOYS; HETEROSTRUCTURES; SILICON
AB We recently reported the chemical vapor deposition growth of binary Ge1-ySny and ternary Ge1-ySixSny alloys directly on Si wafers using SnD4, Ge2H6 (di-germane), SiH3GeH3, and (GeH3)(2)SiH2 sources. Ge1-ySny is an intriguing infrared (IR) material that undergoes an indirect-to-direct band-gap transition for y < 0.1. In addition, we have found that Ge1-ySny layers have ideal properties as templates for the subsequent deposition of other semiconductors: (i) they are strain-relaxed and have low threading-defect densities (10(5) cm(-2)) even for films thinner than 1 mu m; (ii) their low growth temperatures between 250 and 350 degrees C are compatible with selective growth, and the films possess the necessary thermal stability for conventional semiconductor processing (up to 750 degrees C, depending on composition); (iii) they exhibit tunable lattice constants between 5.65 angstrom and at least 5.8 angstrom, matching InGaAs an related III-V systems; (iv) their surfaces are extremely flat; (v) they grow selectively on Si and not on SiO2; and (vi) the film surface can be prepared by simple chemical cleaning for subsequent ex situ epitaxy. The incorporation of Sn lowers the absorption edges of Ge. Therefore, Ge1-ySny is attractive for detector and photovoltaic applications that require band gaps lower than that of Ge. Spectroscopic ellipsometry and photoreflectance experiments show that the direct band gap is halved for as little as y = 0.15. Studies of a Ge0.98Sn0.02 sample yield an absorption coefficient of 3500 cm(-1) at 1675 nm (0.74 eV). Thus, IR detectors based on Ge0.98Sn0.02 could easily cover the L-(1565-1625 nm) and C-(1530-1565 nm) telecomm bands. Photoluminescence studies show band-gap emission on thin GeSn layers sandwiched between higher band-gap SiGeSn barriers. We have made advances in p- and n-doping of GeSn and present results on electrical characterizations. Hall measurements reveal mobilities as high as of 600 cm(2)/V-s and background p-dopant concentrations in the 10(16) cm(-3) range for samples with nominal composition and thickness of Ge0.98Sn0.02 and similar to 500 nm, respectively. GeSn also has application in band-to-band laser heterodiodes. The ternary system Ge1-x-ySixSny grows on Ge1-ySny-buffered Si. It represents the first practical group IV ternary alloy, because C can only be incorporated in minute amounts to the Ge-Si network. The most significant feature of Ge1-x-ySixSny, is the possibility of independent adjustment of the lattice constant and band gap. For the same value of the lattice constant, one can obtain band gaps differing by >0.2 eV, even if the Sn concentration is limited to the range y < 0.2. This property can be used to develop a variety of novel devices, from multicolor detectors to multiple-junction photovoltaic cells. A linear interpolation of band-gap lattice constants between Si, Ge, and alpha-Sn shows that it is possible to obtain SiGeSn with a band gap and a lattice constant larger than that of Ge. We shall use this feature to make a tensile-strained Ge-on-SiGeSn telecomm detector with improved performance. To date, record high tensile strain (0.
40%) has been achieved in Ge layers gron on GeSn-buffered Si where the strain is systematically tuned by adjusting the lattice constant in the buffer. A tensile-strain-induced direct gap of Ge can be used also for laser diodes and electroptical modulators.
C1 Hanscom AFB, Sensors Directorate, USAF, Res Lab, Bedford, MA 01731 USA.
Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287 USA.
Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA.
RP Soref, R (reprint author), Hanscom AFB, Sensors Directorate, USAF, Res Lab, Bedford, MA 01731 USA.
EM Richard.Soref@hanscom.af.mil
RI Menendez, Jose/C-1034-2009
OI Menendez, Jose/0000-0001-8739-9197
NR 15
TC 44
Z9 45
U1 5
U2 37
PU MATERIALS RESEARCH SOC
PI WARRENDALE
PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA
SN 0884-2914
J9 J MATER RES
JI J. Mater. Res.
PD DEC
PY 2007
VL 22
IS 12
BP 3281
EP 3291
DI 10.1557/JMR.2007.0415
PG 11
WC Materials Science, Multidisciplinary
SC Materials Science
GA 238ZL
UT WOS:000251487100001
ER
PT J
AU Mass, J
Avella, M
Jimenez, J
Callahan, M
Bliss, D
Wang, BG
AF Mass, J.
Avella, M.
Jimenez, J.
Callahan, M.
Bliss, D.
Wang, Buguo
TI Cathodoluminescence study of defects created by Vickers indentation in
hydrothermal ZnO crystals
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID PHOTOLUMINESCENCE; LUMINESCENCE; GROWTH
AB Vickers indentations of ZnO crystals grown by the hydrothermal method were studied by cathodoluminescence. The defects induced by indentation influenced the luminescence spectrum, indicating the generation of non radiative recombination centers and a band close to the first phonon replica of the free exciton, in the surrounding area near the indentation. The possible nature of the defects responsible for such band is discussed. A comparison with polishing induced damage is also presented.
C1 ETSII, Valladolid 47011, Spain.
Univ Norte, Dpto Matemat & Fis, Barranquilla, Colombia.
USAF, Sensors Directorate, Res Lab, Hanscom AFB, Bedford, MA 01731 USA.
Solid State Sci Corp, Hollis, NH 03049 USA.
RP Jimenez, J (reprint author), ETSII, Valladolid 47011, Spain.
EM jimenez@fmc.uva.es
NR 18
TC 4
Z9 4
U1 0
U2 4
PU MATERIALS RESEARCH SOC
PI WARRENDALE
PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA
SN 0884-2914
J9 J MATER RES
JI J. Mater. Res.
PD DEC
PY 2007
VL 22
IS 12
BP 3526
EP 3530
DI 10.1557/JMR.2007.0444
PG 5
WC Materials Science, Multidisciplinary
SC Materials Science
GA 238ZL
UT WOS:000251487100031
ER
PT J
AU Serak, SV
Tabiryan, NV
Bunning, TJ
AF Serak, Svetlana V.
Tabiryan, Nelson V.
Bunning, Timothy J.
TI Nonlinear transmission of photosensitive cholesteric liquid crystals due
to spectral bandwidth auto-tuning or restoration
SO JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS
LA English
DT Article
DE cholesteric liquid crystals; azobenzene; lasers; nonlinear optics;
tunable photonic bandgaps
ID PITCH
AB Cholesteric liquid crystals (CLCs) which possess a periodicity in the visible portion of the spectra, exhibit selective reflection of circularly polarized light. The ability to modulate this color through a variety of means has been explored, including work which incorporated azobenzene LCs. Two types of systems have recently been explored utilizing wavelength-specific cis-trans isomerization processes, which enable unprecedented photosensitivity. The first system exhibits large blue or red-shifted changes in reflection wavelength upon visible irradiation. The second system exploits the metastable, long-lived photoinduced isotropic state, whose return to the reflective Grandjean texture can be induced by wavelength-specific radiation. We demonstrate nonlinear transmission from both types of systems, starting with submicrowatt power levels and spanning over four orders of magnitude dynamic range. The power dependence and temporal evolution of this effect (10 - 100ms) is documented here for red or green laser wavelengths. The effect for the former case is due to bandgap auto-tuning, when the laser beam is tuning the CLC Bragg reflection band to its own wavelength. For the latter case, autonomous, optical feedback due to bandgap restoration is the cause of the nonlinear transmission properties.
C1 [Serak, Svetlana V.; Tabiryan, Nelson V.] Beam Engn Adv Measurements Co, Winter Pk, FL 32789 USA.
[Bunning, Timothy J.] Wright Patterson AFB, AF Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Serak, SV (reprint author), Beam Engn Adv Measurements Co, 809 S Orlando Ave,Suite 1, Winter Pk, FL 32789 USA.
EM nelson@beamco.com
NR 17
TC 14
Z9 14
U1 0
U2 6
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0218-8635
J9 J NONLINEAR OPT PHYS
JI J. Nonlinear Opt. Phys. Mater.
PD DEC
PY 2007
VL 16
IS 4
BP 471
EP 483
DI 10.1142/S0218863507003895
PG 13
WC Optics; Physics, Applied
SC Optics; Physics
GA 253MD
UT WOS:000252521400004
ER
PT J
AU Kaziska, D
Srivastava, A
AF Kaziska, David
Srivastava, Anuj
TI Gait-based human recognition by classification of cyclostationary
processes on nonlinear shape manifolds
SO JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION
LA English
DT Article
DE biometrics; gait recognition; shape analysis; shape classification;
statistics on shape manifolds
ID STOCHASTIC CALCULUS APPROACH; SPACES; DIFFUSION; METRICS
AB We study the problem of analyzing and classifying human gait by modeling it as a stochastic process on a shape space. We consider gait as a evolution of human silhouettes as seen in video sequences, and focus on their shapes. More specifically, we define a shape space of planar, closed curves and model a human gait as a stochastic process on this space. Due to the periodic nature of human walk, this process is naturally constrained to be cyclostationary, that is, its mean path is assumed to be cyclic. We compare two subjects using a metric that quantifies differences between average gait cycles of each subject. This computation uses several tools from differential geometry of the shape space, including computation of geodesics, estimation of means of observed shapes, interpolation between observed shapes, and temporal registration of two gait cycles. Finally, we apply a nearest-neighbor classifier, using the gait metric, to perform human recognition, and present results from an experiment involving 26 subjects.
C1 [Kaziska, David] Air Force Inst Technol, Wright Patterson Air Force Base, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
[Srivastava, Anuj] Florida State Univ, Dept Stat, Tallahassee, FL 32306 USA.
RP Kaziska, D (reprint author), Air Force Inst Technol, Wright Patterson Air Force Base, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
EM david.kaziska@afit.edu; anuj@stat.fsu.edu
RI Srivastava, Anuj/F-7417-2011
NR 34
TC 12
Z9 12
U1 0
U2 0
PU AMER STATISTICAL ASSOC
PI ALEXANDRIA
PA 1429 DUKE ST, ALEXANDRIA, VA 22314 USA
SN 0162-1459
J9 J AM STAT ASSOC
JI J. Am. Stat. Assoc.
PD DEC
PY 2007
VL 102
IS 480
BP 1114
EP 1124
DI 10.1198/016214507000000464
PG 11
WC Statistics & Probability
SC Mathematics
GA 243WY
UT WOS:000251829200005
ER
PT J
AU Kaziska, DM
Srivastava, A
AF Kaziska, David M.
Srivastava, Anuj
TI Gait-based human recognition by classification of cyclostationary
processes on nonlinear shape manifolds - Rejoinder
SO JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION
LA English
DT Editorial Material
C1 [Kaziska, David M.] Wright Patterson Air Force Base, Air Force Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
[Srivastava, Anuj] Florida State Univ, Dept Stat, Tallahassee, FL 32306 USA.
RP Kaziska, DM (reprint author), Wright Patterson Air Force Base, Air Force Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
EM david.kaziska@afit.edu; anaj@stat.fsu.edu
RI Srivastava, Anuj/F-7417-2011
NR 7
TC 0
Z9 0
U1 0
U2 0
PU AMER STATISTICAL ASSOC
PI ALEXANDRIA
PA 732 N WASHINGTON ST, ALEXANDRIA, VA 22314-1943 USA
SN 0162-1459
EI 1537-274X
J9 J AM STAT ASSOC
JI J. Am. Stat. Assoc.
PD DEC
PY 2007
VL 102
IS 480
BP 1127
EP 1128
DI 10.1198/016214507000001238
PG 2
WC Statistics & Probability
SC Mathematics
GA 243WY
UT WOS:000251829200008
ER
PT J
AU Wang, X
Pan, E
Roy, AK
AF Wang, X.
Pan, E.
Roy, A. K.
TI New phenomena concerning a screw dislocation interacting with two
imperfect interfaces
SO JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
LA English
DT Article
DE screw dislocation; imperfect interface; image force; equilibrium
position; dislocation mobility and stability
ID CIRCULAR INCLUSION; ANTIPLANE SHEAR; NANOCRYSTALS; BIMATERIALS;
COMPOSITES; INTERPHASE; STABILITY; MEDIA; FIBER; MODEL
AB Dislocation mobility and stability in nanocrystals and electronic materials are influenced by the material composition and interface conditions. Its mobility and stability then affect the mechanical behaviors of the composites. In this paper, we first address, in detail, the problem of a screw dislocation located in an annular coating layer which is imperfectly bonded to the inner circular inhomogeneity and to the outer unbounded matrix. Both the inhomogeneity-coating interface and coating matrix interface are modeled by a linear spring with vanishing thickness to account for the possible damage occurring on the interface. An analytic solution in series form is derived by means of complex variable method, with all the unknown constants being determined explicitly. The solution is then applied to the study of the dislocation mobility and stability due to its interaction with the two imperfect interfaces. The most interesting finding is that when the middle coating layer is more compliant than both the inner inhomogeneity and the outer unbounded matrix and when the interface rigidity parameters for the two imperfect interfaces are greater than certain values, one stable and two unstable equilibrium positions can exist for the dislocation. Furthermore, under certain conditions an equilibrium position, which can be either stable or unstable (i.e., a saddle point), can exist, which has never been observed in previous studies. Results for a screw dislocation interacting with two parallel straight imperfect interfaces are also presented as the limiting case where the radius of the inner inhomogeneity approaches infinity while the thickness of the coating layer is fixed. (c) 2007 Elsevier Ltd. All rights reserved.
C1 [Wang, X.; Pan, E.] Univ Akron, Dept Civil Engn, Akron, OH 44325 USA.
[Wang, X.; Pan, E.] Univ Akron, Dept Appl Math, Akron, OH 44325 USA.
[Roy, A. K.] USAF, Res Lab, AFRL MLBCM, Wright Patterson AFB, OH 45433 USA.
RP Pan, E (reprint author), Univ Akron, Dept Civil Engn, Akron, OH 44325 USA.
EM pan2@uakron.edu
RI Pan, Ernian/F-4504-2011
OI Pan, Ernian/0000-0001-6640-7805
NR 31
TC 15
Z9 16
U1 0
U2 3
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0022-5096
J9 J MECH PHYS SOLIDS
JI J. Mech. Phys. Solids
PD DEC
PY 2007
VL 55
IS 12
BP 2717
EP 2734
DI 10.1016/j.jmps.2007.03.017
PG 18
WC Materials Science, Multidisciplinary; Mechanics; Physics, Condensed
Matter
SC Materials Science; Mechanics; Physics
GA 246MP
UT WOS:000252011400008
ER
PT J
AU Peck, MA
Rasmussen, TE
AF Peck, Michael A.
Rasmussen, Todd E.
TI Recognition of Air Force surgeons at Wilford Hall Medical
Center-supported 332nd EMDG/Air Force Theater Hospital, Balad Air Base,
Iraq - Reply
SO JOURNAL OF VASCULAR SURGERY
LA English
DT Letter
C1 [Peck, Michael A.; Rasmussen, Todd E.] Uniformed Serv Univ Hlth Sci, F Edward Hebert Sch Med, Bethesda, MD 20814 USA.
[Peck, Michael A.] Massachusetts Gen Hosp, Div Vasc & Endovasc Surg, Boston, MA 02114 USA.
[Rasmussen, Todd E.] Wilford Hall USAF Med Ctr, Chief San Antonio Mil Vasc Surg Serv, Lackland AFB, TX USA.
RP Peck, MA (reprint author), Uniformed Serv Univ Hlth Sci, F Edward Hebert Sch Med, Bethesda, MD 20814 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0741-5214
J9 J VASC SURG
JI J. Vasc. Surg.
PD DEC
PY 2007
VL 46
IS 6
BP 1313
EP 1313
DI 10.1016/j.jvs.2007.08.065
PG 1
WC Surgery; Peripheral Vascular Disease
SC Surgery; Cardiovascular System & Cardiology
GA 241IG
UT WOS:000251649500039
ER
PT J
AU Olson, SE
DeSimio, MP
Derriso, MP
AF Olson, Steven E.
DeSimio, Martin P.
Derriso, Mark M.
TI Beam forming of lamb waves for structural health monitoring
SO JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
LA English
DT Article
ID PLATES; DAMAGE
AB Structural health monitoring techniques are being developed to reduce operations and support costs, increase availability, and maintain safety of current and future air vehicle systems. The use of Lamb waves, guided elastic waves in a plate, has shown promise in detecting localized damage, such as cracking or corrosion, due to the short wavelengths of the propagating waves. Lamb wave techniques have been utilized for structural health monitoring of simple plate and shell structures. However most aerospace structures are significantly more complex and advanced techniques may be required. One advanced technique involves using an array of piezoelectric transducers to generate or sense elastic waves in the structure under inspection. By adjusting the spacing and/or phasing between the piezoelectric transducers, transmitted or received waves can be focused in a specific direction. This paper presents beam forming details based on analytical modeling, using the finite element method, and experimental testing, using an array of piezoelectric transducers on an aluminum panel. Results are shown to compare well to theoretical predictions.
C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA.
ATK Space Syst & Sensors, Dayton, OH 45430 USA.
USAF, Res Lab, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA.
RP Olson, SE (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
NR 25
TC 11
Z9 11
U1 0
U2 2
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 1048-9002
J9 J VIB ACOUST
JI J. Vib. Acoust.-Trans. ASME
PD DEC
PY 2007
VL 129
IS 6
BP 730
EP 738
DI 10.1115/1.2731404
PG 9
WC Acoustics; Engineering, Mechanical; Mechanics
SC Acoustics; Engineering; Mechanics
GA 231HH
UT WOS:000250936900006
ER
PT J
AU Paredes, R
Marconi, VC
Campbell, TB
Kuritzkes, DR
AF Paredes, Roger
Marconi, Vincent C.
Campbell, Thomas B.
Kuritzkes, Daniel R.
TI Systematic evaluation of allele-specific real-time PCR for the detection
of minor HIV-1 variants with pol and env resistance mutations
SO JOURNAL OF VIROLOGICAL METHODS
LA English
DT Article
DE HIV-1; antiretroviral drug resistance; allele-specific PCR; real-time
PCR; minority variants; quasispecies
ID IMMUNODEFICIENCY-VIRUS TYPE-1; DRUG-RESISTANCE; ANTIRETROVIRAL THERAPY;
ZIDOVUDINE RESISTANCE; GENOTYPE ANALYSIS; GENETIC-VARIATION; RANDOMIZED
TRIAL; INDIVIDUALS; MANAGEMENT; DNA
AB Allele-specificPCR(ASPCR) is a highly sensitive, and reproducible method for the study of minor HIV-1 variants harboring resistance mutations and is significantly less labor-intensive and time-consuming than other techniques used for similar purposes. Furthermore, ASPCR has multiple applications in HIV research: it provides earlier and more sensitive detection of evolving resistance mutations, a more accurate assessment of transmitted drug-resistant mutants and a better evaluation of resistance selection after post-exposure or mother-to-child-transmission prophylaxis programs. This article outlines the principles of ASPCR and illustrates technical challenges in the design and application of ASPCR protocols by describing ASPCR assays developed for detecting resistance mutations in the protease (PR)- and reverse transcriptase (RT)-coding regions of pol and env. The assays achieved sensitivities of <1% for the D30N mutation in HIV-1 PR, M184V and I mutations in RT, and V38A in gp41. This method can be easily adapted to the quantitative detection of other mutations in HIV-1 or other viruses by introducing minor modifications to the methods described. In addition, ASPCR can be used to assess the dynamics of mutant populations in the viral quasispecies in response to changing selection pressures, allowing inferences on viral fitness in vivo through mathematical modeling. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Paredes, Roger; Marconi, Vincent C.; Kuritzkes, Daniel R.] Harvard Univ, Sch Med, Brigham & Womens Hosp, Sect Retroviral Therapeut, Boston, MA USA.
[Paredes, Roger; Marconi, Vincent C.; Kuritzkes, Daniel R.] Harvard Univ, Sch Med, Div Aids, Boston, MA USA.
[Paredes, Roger] Univ Autonoma Barcelona, Hosp Univ Germans Trias Pujol, Fdn irsiCaixa Lluita Contra SIDA, Badalona, Catalonia, Spain.
[Marconi, Vincent C.] Wilford Hall USAF Med Ctr, San Antonio, TX USA.
[Campbell, Thomas B.] Univ Colorado, Hlth Sci Ctr, Dept Med, Div Infect Dis, Denver, CO 80202 USA.
RP Kuritzkes, DR (reprint author), Brigham & Womens Hosp, Sect Retroviral Therapeut, 65 Landsdowne St,Room 449, Cambridge, MA USA.
EM dkuritzkes@partners.org
RI Marconi, Vincent/N-3210-2014
OI Marconi, Vincent/0000-0001-8409-4689
FU NCRR NIH HHS [K24 RR016482, K24 RR016482-07, K24 RR16482]; NIAID NIH HHS
[UM1 AI068636, AI68636, P30 AI060354, P30 AI060354-04, P30 AI60354, U01
AI 38858, U01 AI038858, U01 AI038858-09, U01 AI068636, U01 AI068636-02]
NR 40
TC 44
Z9 46
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0166-0934
J9 J VIROL METHODS
JI J. Virol. Methods
PD DEC
PY 2007
VL 146
IS 1-2
BP 136
EP 146
DI 10.1016/j.jviromet.2007.06.012
PG 11
WC Biochemical Research Methods; Biotechnology & Applied Microbiology;
Virology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Virology
GA 241HV
UT WOS:000251648400019
PM 17662474
ER
PT J
AU Salas, W
Alba-Baena, NG
Murr, LE
AF Salas, W.
Alba-Baena, N. G.
Murr, L. E.
TI Explosive shock-wave consolidation of aluminum powder/carbon nanotube
aggregate mixtures: Optical and electron metallography
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT 4th Symposium on the Dynamic Behavior of Materials held at the 2007 TMS
Annual Meeting and Exhibition
CY FEB 25-MAR 01, 2007
CL Orlando, FL
SP TMS Structural Mat Div, TMS/ASM Mech Behav Mat Comm
ID COMPOSITES; FABRICATION
AB The formation of conventional metal-matrix composites reinforced with carbon nanotubes (CNTs) has proven difficult because of the agglomeration and inability of CNTs to disperse. We have explored the explosive consolidation of 150-mu m aluminum powder/multiwalled carbon nanotube (MWCNT) aggregates (including multiconcentric fullerenes) at volume percentages of 2 and 5 pct. These consolidated mixtures formed two-phase, monolithic systems (TPSs) with the MWCNT aggregate material spreading along the Al grains and forming carbon phases mainly at the AI particle triple points. The Al powder particle (or grain) hardness increased from HRE 22 to HRE 40 for the consolidated Al, while the two-phase system hardness dropped from H RE 40 to HRE 39 and 33, respectively, for 2 and 5 vol pct MWCNT aggregate additions. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) observations illustrate a laminate-like structure of the consolidated MWCNT aggregate material, which is easily delaminated, causing intergranular (Al) failure. The Al grains exhibited a shock-induced dislocation substructure (0.5 to 3 mu m) and recrystallized subgrains, which increased the individual particle/grain Vickers hardness from 24 to 43 HV.
C1 Tinker AFB, Oklahoma City, OK USA.
Univ Autonoma Ciudad Juarez, Juarez, Mexico.
Univ Texas El Paso, El Paso, TX 79907 USA.
RP Salas, W (reprint author), Tinker AFB, Oklahoma City, OK USA.
EM nalba@uacj.mx
RI Alba-Baena, Noe/C-3315-2012;
OI Murr, Lawrence/0000-0001-5942-8376
NR 11
TC 21
Z9 21
U1 0
U2 10
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD DEC
PY 2007
VL 38A
IS 12
BP 2928
EP 2935
DI 10.1007/s11661-007-9336-x
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 238BQ
UT WOS:000251422700009
ER
PT J
AU Nicolaou, PD
Semiatin, SL
AF Nicolaou, P. D.
Semiatin, S. L.
TI Effect of strain-path reversal on microstructure evolution and
cavitation during hot torsion testing of Ti-6Al-4V
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID TITANIUM-ALLOYS; FLOW BEHAVIOR; CAVITY-GROWTH; SUPERPLASTIC DEFORMATION;
WORKING; DEPENDENCE; POWDER
AB Hot torsion testing comprising multiple twist reversals was used to establish the effect of strain-path changes on concurrent dynamic globularization and cavitation of Ti-6Al-4V with a colony-alpha starting microstructure. Optical microscopy was used to quantify the cavity area fraction and the effect of globularization on cavitation. The deformation of the hard and soft colonies surrounding the largest cavities and self-consistent-model calculations of strain partitioning were used to estimate the macroscopic and local strains at which colonies with different strengths globularize. It was found that both hard and soft colonies undergo dynamic globularization at the same local strain (i.e., strain within the colony). In addition, cavitation behavior during torsion with multiple strain-path changes was interpreted by taking into account the break up of the colonies into a globular structure. It was found that cavity growth (or shrinkage) persisted as long as there was a flow-stress difference in adjacent regions/colonies surrounding a given cavity. When the microstructure became uniform (as in the case of full globularization), the cavity area fraction did not measurably change with subsequent additional deformation.
C1 Universal Energy Syst Inc, Mat & Proc Div, Dayton, OH 45432 USA.
USAF, Res Lab, Mat & Mfg Directorate, AFRL MLLM,Wright Patterson AFB, Dayton, OH 45433 USA.
RP Nicolaou, PD (reprint author), Universal Energy Syst Inc, Mat & Proc Div, Dayton, OH 45432 USA.
EM nicolaoup@aget.gr
RI SEMIATIN, SHELDON/E-7264-2017
NR 26
TC 9
Z9 9
U1 0
U2 9
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD DEC
PY 2007
VL 38A
IS 12
BP 3023
EP 3031
DI 10.1007/s11661-007-9343-y
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 238BQ
UT WOS:000251422700020
ER
PT J
AU Sorenson, DS
AF Sorenson, David S.
TI Civil-military relations in North Africa
SO MIDDLE EAST POLICY
LA English
DT Article
C1 USAF, Air War Coll, Maxwell AFB, AL USA.
RP Sorenson, DS (reprint author), USAF, Air War Coll, Maxwell AFB, AL USA.
NR 0
TC 5
Z9 5
U1 2
U2 2
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 1061-1924
J9 MIDDLE EAST POLICY
JI Middle East Policy
PD WIN
PY 2007
VL 14
IS 4
BP 99
EP 114
DI 10.1111/j.1475-4967.2007.00327.x
PG 16
WC Area Studies; International Relations
SC Area Studies; International Relations
GA 235RL
UT WOS:000251251900008
ER
PT J
AU Peterson, AL
Severson, HH
Andrews, JA
Gott, SP
Cigrang, JA
Gordon, JS
Hunter, CM
Martin, GC
AF Peterson, Alan L.
Severson, Herb H.
Andrews, Judy A.
Gott, Sherrie P.
Cigrang, Jeffrey A.
Gordon, Judith S.
Hunter, Christine M.
Martin, Gary C.
TI Smolkeless tobacco use in military personnel
SO MILITARY MEDICINE
LA English
DT Article
ID SMOKELESS TOBACCO; UNITED-STATES; CIGARETTE-SMOKING; ORAL LEUKOPLAKIA;
YOUNG-ADULTS; CANCER; POPULATION; RISK; PREVALENCE; PREDICTORS
AB Military personnel are more than twice as likely as civilians to use smokeless tobacco (ST), and recent studies indicate that military prevalence rates are rising. However, few studies have examined factors related to ST use in the military. The present study evaluated the characteristics of ST use in 785 active duty military personnel. The results indicated that the average age of initiation was 17.7 years, participants had used ST for 12.3 years, and they used approximately four tins or pouches of tobacco per week. Army personnel were more likely than Air Force personnel to be older, to have used ST longer, and to be heavier users. Officers had used ST longer than enlisted personnel and were more likely to have had a recent quit attempt. Enlisted personnel were more than three times as likely to report concurrent cigarette smoking. These results indicate that there are significant differences in ST use patterns in military personnel, and cessation programs should be tailored to meet these differences.
C1 [Peterson, Alan L.; Gott, Sherrie P.] Univ Texas, Hlth Sci Ctr, Dept Psychiat, San Antonio, TX 78229 USA.
[Peterson, Alan L.; Gott, Sherrie P.; Cigrang, Jeffrey A.; Hunter, Christine M.] Wilford Hall USAF Med Ctr, Dept Psychol, Lackland AFB, TX 78236 USA.
[Severson, Herb H.; Andrews, Judy A.; Gordon, Judith S.] Oregon Res Inst, Eugene, OR 97403 USA.
[Martin, Gary C.] TRICARE Management Activity, Falls Church, VA 22041 USA.
RP Peterson, AL (reprint author), Univ Texas, Hlth Sci Ctr, Dept Psychiat, San Antonio, TX 78229 USA.
NR 42
TC 12
Z9 12
U1 1
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 DEC
PY 2007
VL 172
IS 12
BP 1300
EP 1305
PG 6
WC Medicine, General & Internal
SC General & Internal Medicine
GA 242RQ
UT WOS:000251743700017
PM 18274033
ER
PT J
AU Dolan, MJ
Kulkarni, H
Camargo, JF
He, W
Smith, A
Anaya, JM
Miura, T
Hecht, FM
Mamtani, M
Pereyra, F
Marconi, V
Mangano, A
Sen, L
Bologna, R
Clark, RA
Anderson, SA
Delmar, J
O'Connell, RJ
Lloyd, A
Martin, J
Ahuja, SS
Agan, BK
Walker, BD
Deeks, SG
Ahuja, SK
AF Dolan, Matthew J.
Kulkarni, Hemant
Camargo, Jose F.
He, Weijing
Smith, Alison
Anaya, Juan-Manuel
Miura, Toshiyuki
Hecht, Frederick M.
Mamtani, Manju
Pereyra, Florencia
Marconi, Vincent
Mangano, Andrea
Sen, Luisa
Bologna, Rosa
Clark, Robert A.
Anderson, Stephanie A.
Delmar, Judith
O'Connell, Robert J.
Lloyd, Andrew
Martin, Jeffrey
Ahuja, Seema S.
Agan, Brian K.
Walker, Bruce D.
Deeks, Steven G.
Ahuja, Sunil K.
TI CCL3L1 and CCR5 influence cell-mediated immunity and affect HIV-AIDS
pathogenesis via viral entry-independent mechanisms
SO NATURE IMMUNOLOGY
LA English
DT Article
ID HUMAN-IMMUNODEFICIENCY-VIRUS; CD8(+) T-CELLS; TYPE-1 INFECTION; DISEASE
PROGRESSION; IN-VITRO; HYPERSENSITIVITY; CHEMOKINES; PLASMA; RNA;
SUSCEPTIBILITY
AB Although host defense against human immunodeficiency virus 1 (HIV- 1) relies mainly on cell-mediated immunity (CMI), the determinants of CMI in humans are poorly understood. Here we demonstrate that variations in the genes encoding the chemokine CCL3L1 and HIV coreceptor CCR5 influence CMI in both healthy and HIV- infected individuals. CCL3L1-CCR5 genotypes associated with altered CMI in healthy subjects were similar to those that influence the risk of HIV transmission, viral burden and disease progression. However, CCL3L1-CCR5 genotypes also modify HIV clinical course independently of their effects on viral load and CMI. These results identify CCL3L1 and CCR5 as major determinants of CMI and demonstrate that these host factors influence HIV pathogenesis through their effects on both CMI and other viral entry-independent mechanisms.
C1 Univ Texas Hlth Sci Ctr San Antonio, S Texas Vet Hlth Care Syst, Vet Adm Res Ctr AIDS & HIV Infect 1, San Antonio, TX 78229 USA.
Univ Texas Hlth Sci Ctr San Antonio, Dept Med, San Antonio, TX 78229 USA.
Wilford Hall USAF Med Ctr, Infect Dis Clin Res Program, Lackland AFB, TX 78236 USA.
Wilford Hall USAF Med Ctr, Infect Dis Serv, Lackland AFB, TX 78236 USA.
Wilford Hall USAF Med Ctr, Henry M Jackson Fdn, Lackland AFB, TX 78236 USA.
Univ Western Sydney, Sch Psychol, Penrith, NSW 1797, Australia.
Univ Rosario, Corporac Invest Biol, Cellular Biol & Immunogenet Unit, Medellin, Colombia.
Massachusetts Gen Hosp, Partners AIDS Res Ctr, Boston, MA 02114 USA.
Harvard Univ, Massachusetts Gen Hosp, Sch Med, Div AIDS, Boston, MA 02114 USA.
Univ Calif San Francisco, Dept Med, San Francisco, CA 20815 USA.
San Francisco Gen Hosp, San Francisco, CA 20815 USA.
Hosp Pediat JP Garrahan, Lab Biol Celular & Retrovirus, RA-1245 Buenos Aires, DF, Argentina.
Hosp Pediat JP Garrahan, Serv Infectol, RA-1245 Buenos Aires, DF, Argentina.
Univ New S Wales, Sch Med Sci, Sydney, NSW 2052, Australia.
Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94107 USA.
Univ Texas Hlth Sci Ctr San Antonio, Dept Microbiol & Immunol, San Antonio, TX 78229 USA.
Univ Texas Hlth Sci Ctr San Antonio, Dept Biochem, San Antonio, TX 78229 USA.
Howard Hughes Med Inst, Chevy Chase, MD 20815 USA.
RP Ahuja, SK (reprint author), Univ Texas Hlth Sci Ctr San Antonio, S Texas Vet Hlth Care Syst, Vet Adm Res Ctr AIDS & HIV Infect 1, San Antonio, TX 78229 USA.
EM mdolan@hjf.org; ahujas@uthscsa.edu
RI Marconi, Vincent/N-3210-2014; Anaya, Juan-Manuel/J-1960-2016;
OI Marconi, Vincent/0000-0001-8409-4689; Anaya,
Juan-Manuel/0000-0002-6444-1249; Universidad del Rosario,
Biblioteca/0000-0003-3491-9392; Agan, Brian/0000-0002-5114-1669
NR 53
TC 118
Z9 119
U1 3
U2 12
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1529-2908
J9 NAT IMMUNOL
JI Nat. Immunol.
PD DEC
PY 2007
VL 8
IS 12
BP 1324
EP 1336
DI 10.1038/ni1521
PG 13
WC Immunology
SC Immunology
GA 235XG
UT WOS:000251267000013
PM 17952079
ER
PT J
AU Lopez, J
Raines, RA
Temple, MA
Baldwin, RO
Stephens, JP
AF Lopez, Juan, Jr.
Raines, Richard A.
Temple, Michael A.
Baldwin, Rusty O.
Stephens, James P., Sr.
TI An investigation on the effects of emerging 4G transmissions on 3G
networks
SO OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
LA English
DT Article
DE telecommunications; wireless communications; 3G; 4G; UWB; WiFi
AB Within the last 10 years, technological advances have allowed personal wireless communications to become part of our global, information-centric culture. Cellular telephones, personal digital assistants, and wireless computer networks allow for tetherless use anytime and almost anywhere. These wireless communication advances have quickly matured through three technological generations. Currently, wireless communications are considered to be in the third generation (3G) of deployment and are rapidly approaching the fourth (4G). As these wireless technologies advance to meet market demand, careful pre-market technical analysis of these new capabilities must be made to understand potential impact on existing communication systems. This paper provides a novel examination into the effects of 4G ultrawide band (UWB) signaling on a 3G wireless fidelity (WiFi) system. Through empirical and statistical analyses, we show that the throughput performance of the Wi-Fi system can be negatively impacted by up to 20%. We conclude that careful implementation of emerging 4G UWB systems must occur to mitigate the detriments to existing 3G communication systems. (c) 2006 Elsevier Ltd. All rights reserved.
C1 USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
US Marine Corps, Norfolk, VA USA.
USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Raines, RA (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, 2956 Hobson Way,Bldg 642, Wright Patterson AFB, OH 45433 USA.
EM richard.raines@afit.edu
NR 9
TC 4
Z9 4
U1 1
U2 8
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0305-0483
J9 OMEGA-INT J MANAGE S
JI Omega-Int. J. Manage. Sci.
PD DEC
PY 2007
VL 35
IS 6
BP 706
EP 714
DI 10.1016/j.omega.2006.03.006
PG 9
WC Management; Operations Research & Management Science
SC Business & Economics; Operations Research & Management Science
GA 151PA
UT WOS:000245301400008
ER
PT J
AU Strong, DM
Cain, SC
AF Strong, David M.
Cain, Stephen C.
TI Maximum a priori estimation of focus aberration in imaging systems
SO OPTICAL ENGINEERING
LA English
DT Article
DE maximum a priori estimation; metrology; focus aberration; detection
AB A maximum a priori (MAP) estimation technique for the detection of focus aberrations in electro-optical imaging systems is developed. The technique simplifies the equipment required in focus aberration detection over previous methodologies. The magnitude of the focus aberration is estimated from a single image. The MAP estimation technique uses a Poisson distribution of the photons arriving at the detector from the object. A Gaussian distribution is added to the statistical model to account for the focus aberration. Using the imaging system statistical model and real laboratory images from a charge-coupled device (CCD) camera, the focus aberration detection (FAD) algorithm produces estimates of the focus aberrations. The results demonstrate a viable approach for estimation and potential removal of focus aberrations in electro-optical systems, without the need to divert any light from the primary channel, or for additional complicated equipment and associated calibration requirements. (C) 2007 Society of Photo-Optical Instrumentation Engineers.
C1 [Strong, David M.; Cain, Stephen C.] USAF, Inst Technol, Dept Elect & Comp Engn, Grad Sch Engn & Management, Wright Patterson AFB, OH 45433 USA.
RP Strong, DM (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, Grad Sch Engn & Management, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM David.Strong@maui.afmc.af.mil
NR 12
TC 0
Z9 0
U1 0
U2 0
PU SPIE-SOC PHOTOPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
J9 OPT ENG
JI Opt. Eng.
PD DEC
PY 2007
VL 46
IS 12
AR 127006
DI 10.1117/1.2823493
PG 11
WC Optics
SC Optics
GA 258CS
UT WOS:000252846600031
ER
PT J
AU Zhdanov, BV
Kontur, F
Phipps, S
Hallada, F
Elsbernd, P
Miller, W
Peay, A
Knize, RJ
AF Zhdanov, B. V.
Kontur, F.
Phipps, S.
Hallada, F.
Elsbernd, P.
Miller, W.
Peay, A.
Knize, R. J.
TI Tunable single frequency cesium laser
SO OPTICS COMMUNICATIONS
LA English
DT Article
DE alkali lasers; optically pumped lasers
ID TRANSITION
AB We present an optically pumped ring cavity Cs vapor laser with output power of 80 mW operating in a single longitudinal mode at 894 nm and tunable over 14 GHz. This laser can be used for laser cooling, production of a spin polarized atoms, spectroscopy and quantum optics. Published by Elsevier B.V.
C1 USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
RP Zhdanov, BV (reprint author), USAF Acad, Dept Phys, 2354 Fairchild Dr, Suite 2A31, Colorado Springs, CO 80840 USA.
EM boris.zhdanov.ctr@usafa.edu
OI Kontur, Frederick/0000-0002-8802-5653
NR 9
TC 14
Z9 17
U1 3
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0030-4018
J9 OPT COMMUN
JI Opt. Commun.
PD DEC 1
PY 2007
VL 280
IS 1
BP 161
EP 164
DI 10.1016/j.optcom.2007.08.009
PG 4
WC Optics
SC Optics
GA 231LC
UT WOS:000250947300025
ER
PT J
AU Stadler, P
Oppelt, K
Singh, TB
Grote, JG
Schwodiauer, R
Bauer, S
Piglmayer-Brezina, H
Bauerle, D
Sariciftci, NS
AF Stadler, Philipp
Oppelt, Kerstin
Singh, Thokchom Birendra
Grote, James G.
Schwoediauer, Reinhard
Bauer, Siegfried
Piglmayer-Brezina, Heidi
Baeuerle, Dieter
Sariciftci, Niyazi Serdar
TI Organic field-effect transistors and memory elements using
deoxyribonucleic acid (DNA) gate dielectric
SO ORGANIC ELECTRONICS
LA English
DT Article
DE deoxyribonucleic acid; organic transistors; hysteresis; organic
dielectric; persistent polarization
ID THIN-FILM TRANSISTORS; POLYMERIC INSULATING LAYERS; ELECTRONICS;
ELECTRET; DEVICES
AB Deoxyribonucleic acid (DNA) bio-polymers derived from fish waste products are employed as gate dielectric in n-type methanofullerene as well as p-type pentacene based organic field-effect transistors working at low voltage levels and low gate leakage currents. Based on the large hysteresis in the transfer characteristics, operation of the transistor as a non-volatile memory element is shown. Practically hysteresis free operation of DNA based transistors is obtained at low voltage levels by adding an additional aluminium oxide blocking layer between the organic semiconductor and the DNA gate dielectric. (c) 2007 Elsevier B.V. All rights reserved.
C1 Johannes Kepler Univ Linz, Linz Inst Organ Solar Cells, A-4040 Linz, Austria.
AFRL MLPS, Wright Patterson Air Force Base, Wright Patterson AFB, OH 45433 USA.
Johannes Kepler Univ Linz, SOMAP, A-4040 Linz, Austria.
Johannes Kepler Univ Linz, Inst Angew Phys, A-4040 Linz, Austria.
RP Singh, TB (reprint author), Johannes Kepler Univ Linz, Linz Inst Organ Solar Cells, A-4040 Linz, Austria.
EM birendra.singh@jku.at
RI Bauer, Siegfried/A-2354-2009; Singh, Birendra/H-1595-2011; Stadler,
Philipp/F-6773-2014
OI Stadler, Philipp/0000-0001-6459-5574
NR 31
TC 71
Z9 73
U1 1
U2 32
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1566-1199
J9 ORG ELECTRON
JI Org. Electron.
PD DEC
PY 2007
VL 8
IS 6
BP 648
EP 654
DI 10.1016/j.orgel.2007.05.003
PG 7
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 234XZ
UT WOS:000251199200002
ER
PT J
AU Browder, DA
Childs, JD
Cleland, JA
Fritz, JM
AF Browder, David A.
Childs, John D.
Cleland, Joshua A.
Fritz, Julie M.
TI Effectiveness of an extension-oriented treatment approach in a subgroup
of subjects with low back pain: A randomized clinical trial
SO PHYSICAL THERAPY
LA English
DT Article
ID PRIMARY-CARE; CENTRALIZATION PHENOMENON; INTERRATER RELIABILITY;
CLASSIFICATION APPROACH; PHYSICAL-THERAPY; PREDICTION RULE; SPINAL
FLEXION; EXERCISES; OUTCOMES; RESPONSIVENESS
AB Background and Purpose
The purpose of this multicenter randomized clinical trial was to examine the effectiveness of an extension-oriented treatment approach (EOTA) in a subgroup of subjects with low back pain (LBP) who were hypothesized to benefit from the treatment compared with similar subjects who received a lumbar spine strengthening exercise program.
Methods
Subjects with LBP and symptoms distal to the buttocks that centralized with extension movements were included. Forty-eight subjects were randomly assigned to groups that received an EOTA (n=26) or a strengthening exercise program(n=22). Subjects attended 8 physical therapy sessions and completed a home exercise program. Follow-up data were obtained at 1 week, 4 weeks, and 6 months after randomization. Primary outcome measures were disability (modified Oswestry Low Back Pain Disability Questionnaire) and pain (Numeric Pain Rating Scale).
Results
Subjects in the EOTA group experienced greater improvements in disability compared with subjects who received trunk strengthening exercises at 1 week (mean difference between groups from baseline=8.9, 95% confidence interval [CI]=2.0, 15.9), 4 weeks, (mean difference= 14.4, 95% CI=4-8, 23.9), and 6 months (mean difference= 14.6, 95% CI=4.6, 24.6). The EOTA group demonstrated greater change in pain at the 1-week follow-up only.
Discussion and Conclusion
An EOTA was more effective than trunk strengthening exercise in a subgroup of subjects hypothesized to benefit from this treatment approach. Additional research is needed to explore whether an EOTA may benefit other subgroups of patients.
C1 59 CSG 59 DTS SGOYP, Lackland AFB, TX 78154 USA.
[Browder, David A.; Childs, John D.] USA Baylor Univ Doctoral Program Phys Therapy, San Antonio, TX USA.
[Cleland, Joshua A.] Franklin Pierce Univ, Concord, NH USA.
[Cleland, Joshua A.] Concord Hosp, Rehabil Serv, Concord, NH USA.
[Fritz, Julie M.] Univ Utah, Div Phys Therapy, Salt Lake City, UT USA.
[Fritz, Julie M.] Intermt Healthcare, Salt Lake City, UT USA.
[Browder, David A.] Wilford Hall USAF Med Ctr, Dept Phys Therapy, San Antonio, TX 78236 USA.
RP Browder, DA (reprint author), 59 CSG 59 DTS SGOYP, 2200 Bergquist Dr,Ste 1, Lackland AFB, TX 78154 USA.
EM david.browder@lackland.af.mil
NR 42
TC 52
Z9 55
U1 0
U2 14
PU AMER PHYSICAL THERAPY ASSOC
PI ALEXANDRIA
PA 1111 N FAIRFAX ST, ALEXANDRIA, VA 22314 USA
SN 0031-9023
J9 PHYS THER
JI Phys. Ther.
PD DEC
PY 2007
VL 87
IS 12
BP 1608
EP 1618
DI 10.2522/pti.20060297
PG 11
WC Orthopedics; Rehabilitation
SC Orthopedics; Rehabilitation
GA 240EX
UT WOS:000251571100005
PM 17895350
ER
PT J
AU Sochava, LS
Basun, SA
Bursian, VE
Razdobarin, AG
Evans, DR
AF Sochava, L. S.
Basun, S. A.
Bursian, V. E.
Razdobarin, A. G.
Evans, D. R.
TI Electric field effects in the EPR spectrum of low-spin Ni3+ centers in
the KTaO3 crystal
SO PHYSICS OF THE SOLID STATE
LA English
DT Article
AB The electric field effects in the EPR spectra of low-spin (S = 1/2) Ni3+ tetragonal centers in KTaO3 single crystals are investigated. It is revealed that the resonance lines are split and the centers are oriented as a result of the interaction of the external field with the electric dipole moment of the center. The dipole moment of the center is determined to be p = 100D = 21 e angstrom. An analysis of the set of experimental data obtained permits one to choose correctly the microscopic models for two nickel centers in KTAO(3) crystals among the models discussed in the literature.
C1 [Sochava, L. S.; Basun, S. A.; Bursian, V. E.; Razdobarin, A. G.] Russian Acad Sci, AF Ioffe Physicotech Inst, R-194021 St Petersburg, Russia.
[Evans, D. R.] USAF Res Lab Mat & Mfg Directore, Wright Patterson Air Force Base, Wright Patterson AFB, OH 45433 USA.
RP Sochava, LS (reprint author), Russian Acad Sci, AF Ioffe Physicotech Inst, Politekhnicheskaya Ul 26, R-194021 St Petersburg, Russia.
EM Lev.Sochava@mail.ioffe.ru
NR 9
TC 3
Z9 3
U1 0
U2 3
PU MAIK NAUKA/INTERPERIODICA/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA
SN 1063-7834
J9 PHYS SOLID STATE+
JI Phys. Solid State
PD DEC
PY 2007
VL 49
IS 12
BP 2262
EP 2265
DI 10.1134/S1063783407120086
PG 4
WC Physics, Condensed Matter
SC Physics
GA 242HU
UT WOS:000251717000008
ER
PT J
AU Ganguly, BN
AF Ganguly, B. N.
TI Hydrocarbon combustion enhancement by applied electric field and plasma
kinetics
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article; Proceedings Paper
CT 34th European-Physical-Society Conference on Plasma Physics
CY JUL 02-06, 2007
CL Palace Culture & Sci, Warsaw, POLAND
SP European Phys Soc, Inst Plasma Phys & Laser Microfusion, Assoc EURATOM-IPPLM
HO Palace Culture & Sci
ID PREMIXED FLAMES; IONS
AB Hydrocarbon flame speed and flame structure modifications have been studied using a low dc applied electric field opposing the gas flow directions. Our electrode configuration leads to a relatively high conduction current with a low applied voltage drop in the flame that permits to collect similar to 10(11) cm(-3) chemi-ion density at the pre-heat flame zone, which seems to simulate DBDs and other plasma assisted combustion enhancement conditions. The dissociative recombination of major positive chemi-ions H3O+ and HCO+ produces 10(11) cm(-3) H, O and OH radicals modifying both combustion kinetics and fluidics. Also, flame electrical conductivity measurement was found to correlate very well with the CH, OH and C-2 chemiluminescence intensity fluctuations.
C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Ganguly, BN (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM Biswa.ganguly@us.af.mil
NR 14
TC 12
Z9 12
U1 0
U2 18
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD DEC
PY 2007
VL 49
IS 12B
BP B239
EP B246
DI 10.1088/0741-3335/49/12B/S22
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 256QY
UT WOS:000252745900024
ER
PT J
AU Modesti, M
Besco, S
Lorenzetti, A
Causin, V
Marega, C
Gilman, JW
Fox, DM
Trulove, PC
De Long, HC
Zammarano, M
AF Modesti, M.
Besco, S.
Lorenzetti, A.
Causin, V.
Marega, C.
Gilman, J. W.
Fox, D. M.
Trulove, P. C.
De Long, H. C.
Zammarano, M.
TI ABS/clay nanocomposites obtained by a solution technique: Influence of
clay organic modifiers
SO POLYMER DEGRADATION AND STABILITY
LA English
DT Article; Proceedings Paper
CT International Conference on Polymer Modification, Degradation and
Stabilisation
CY SEP, 2006
CL San Sebastian, SPAIN
SP Inst Ciencia & Tecnol Polimeros, CSIC, Madrid & Dpto Ciencia & Tecnol Polimeros, Univ Pais Vasco
DE ABS; nanocomposites; solution; organic modifiers
ID ABS/MONTMORILLONITE NANOCOMPOSITE; MECHANICAL-PROPERTIES;
THERMAL-PROPERTIES; LAYERED SILICATES; MORPHOLOGY; MONTMORILLONITE;
DEGRADATION; BEHAVIOR; POLYPROPYLENE; MIXTURES
AB Acrylonitrile-butadiene-styrene (ABS) polymer/clay nanocomposites were produced using an intercalation-adsorption technique from poly mer in solution: polymer/clay suspensions were subjected to ultrasonic processing to increase the effectiveness of mixing. Several kinds of organically modified layered silicates (OMLS) were used to understand the influence of the surfactant nature on the intercalation-exfoliatio. mechanism. We show that only imidazolium-treated montmorillonite (DMHDIM-MMT) is stable at the processing temperature of 200 C used for hot-pressing, whereas alkyl-ammonium modified clays show significant degradation. The morphology of ABS based polymer nanocomposites prepared in this work was characterized by means of wide angle X-ray diffraction. (WAXD) and transmission electron microscopy (TEM). Dynamic-mechanical analysis (DMA) was used to determine the storage modulus an, damping coefficient as a function of temperature, and to investigate the correlations between mechanical properties and morphology of the nano composites. The thermal stability was assessed by means of thermogravimetric analysis (TGA). DMA and TGA show that the nanocomposite based on imidazolium-modified clay out-perform the nanocomposites based on quaternary-ammonium-modified clays in terms of mechanics properties and thermal stability. (C) 2007 Elsevier Ltd. All rights reserved.
C1 [Modesti, M.; Besco, S.; Lorenzetti, A.] Univ Padua, Dept Chem Proc Engn, I-35131 Padua, Italy.
[Causin, V.; Marega, C.] Univ Padua, Dept Chem Sci, I-35131 Padua, Italy.
[Gilman, J. W.; Zammarano, M.] Natl Inst Stand & Technol, Bldg & Fire Res Lab, Gaithersburg, MD 20899 USA.
[Fox, D. M.] American Univ, Dept Chem, Washington, DC 20016 USA.
[Trulove, P. C.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
[De Long, H. C.] USAF, Off Sci Res, Directorate Chem & Life Sci, Arlington, VA 22203 USA.
RP Modesti, M (reprint author), Univ Padua, Dept Chem Proc Engn, Via Marzolo 9, I-35131 Padua, Italy.
EM michele.modesti@unipd.it
OI causin, valerio/0000-0002-2581-8445
NR 25
TC 30
Z9 32
U1 2
U2 18
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0141-3910
J9 POLYM DEGRAD STABIL
JI Polym. Degrad. Stabil.
PD DEC
PY 2007
VL 92
IS 12
BP 2206
EP 2213
DI 10.1016/j.polymdegradstab.2007.01.036
PG 8
WC Polymer Science
SC Polymer Science
GA 250GY
UT WOS:000252289200010
ER
PT J
AU Weaver, DS
Semiatin, SL
AF Weaver, D. S.
Semiatin, S. L.
TI Recrystallization and grain-growth behavior of a nickel-base superalloy
during multi-hit deformation
SO SCRIPTA MATERIALIA
LA English
DT Article
DE nickel; recrystallization; particle-stimulated nucleation; grain-growth;
high-temperature deformation
AB The initial breakdown behavior of Waspaloy ingot material with a coarse, columnar-grain structure was established via isothermal hot compression of double-cone samples. Temperature (1177 degrees C), strain rate (0.1 s(-1)), dwell time between increments of deformation (30 or 60 s), and forging direction relative to the columnar structure were typical of industrial practice. Recrystallization kinetics were more rapid during multi-hit than during monotonic testing. The recrystallization and grain-growth behavior showed a complex dependence on imposed strain, test orientation and dwell time. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
C1 USAF, Res Lab, Mat & Mfg Directorate, AFRL MLLM, Wright Patterson AFB, OH 45433 USA.
RP Weaver, DS (reprint author), USAF, Res Lab, Mat & Mfg Directorate, AFRL MLLM, Wright Patterson AFB, OH 45433 USA.
EM donald.weaver@wpafb.af.mil
RI SEMIATIN, SHELDON/E-7264-2017
NR 9
TC 20
Z9 26
U1 0
U2 12
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD DEC
PY 2007
VL 57
IS 11
BP 1044
EP 1047
DI 10.1016/j.scriptamat.2007.07.033
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 221QJ
UT WOS:000250242100018
ER
PT J
AU Blackwood, B
AF Blackwood, Buck
TI Snatch skill transfer exercises
SO STRENGTH AND CONDITIONING JOURNAL
LA English
DT Article
DE snatch; power snatch; snatch skill transfer exercises
AB Many coaches exclude snatches because of technical and time demands. The inclusion of progressive snatch skill transfer exercises can accelerate the snatch learning process.
C1 [Blackwood, Buck] USAF Acad, Colorado Springs, CO USA.
RP Blackwood, B (reprint author), USAF Acad, Colorado Springs, CO USA.
NR 7
TC 1
Z9 1
U1 0
U2 2
PU ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS
PI LAWRENCE
PA 810 EAST 10TH STREET, LAWRENCE, KS 66044 USA
SN 1524-1602
J9 STRENGTH COND J
JI Strength Cond. J.
PD DEC
PY 2007
VL 29
IS 6
BP 62
EP 66
DI 10.1519/1533-4295(2007)29[62:SSTE]2.0.CO;2
PG 5
WC Sport Sciences
SC Sport Sciences
GA 240AO
UT WOS:000251559600010
ER
PT J
AU Ross, MD
AF Ross, Michael D.
TI Preventing low back pain with athlete education and the prone press-up
exercise
SO STRENGTH AND CONDITIONING JOURNAL
LA English
DT Article
AB Low back pain is a concern for athletes,so implementing a back education program and having athletes add the prone press-up exercise to their existing training program may assist with preventing low back pain.
C1 [Ross, Michael D.] Davis Grant US Air Force Med Ctr, Travis AFB, CA 94535 USA.
RP Ross, MD (reprint author), Davis Grant US Air Force Med Ctr, Travis AFB, CA 94535 USA.
NR 3
TC 0
Z9 0
U1 0
U2 3
PU ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS
PI LAWRENCE
PA 810 EAST 10TH STREET, LAWRENCE, KS 66044 USA
SN 1524-1602
J9 STRENGTH COND J
JI Strength Cond. J.
PD DEC
PY 2007
VL 29
IS 6
BP 78
EP 80
PG 3
WC Sport Sciences
SC Sport Sciences
GA 240AO
UT WOS:000251559600013
ER
PT J
AU Levin, GA
Barnes, PN
AF Levin, George A.
Barnes, Paul N.
TI The normal zone in YBa2Cu3O6+x-coated conductors
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
ID O COATED CONDUCTORS; YBCO TAPES; PROPAGATION; SUPERCONDUCTORS; BEHAVIOR
AB We consider the distribution of an electric field in YBa2Cu3O7-x (YBCO)-coated conductors for a situation in which the DC transport current is forced into the copper stabilizer due to a weak link -a section of the superconducting film with a critical current less than the transport current. The electric field in the metal substrate is also discussed. The results are compared with recent experiments on normal zone propagation in coated conductors in which the substrate and stabilizer are insulated from each other. The potential difference between the substrate and stabilizer, and the electric field in the substrate outside the normal zone, can be accounted for by a large screening length in the substrate, comparable to the length of the sample. During a quench, the electric field inside the interface between YBCO and the stabilizer, as well as in the buffer layer, can be several orders of magnitude greater than the longitudinal macroscopic electric field inside the normal zone. We speculate on the possibility of using microscopic electric discharges caused by this large (similar to kV cm(-1)) electric field as a means to detect a quench.
C1 [Levin, George A.; Barnes, Paul N.] USAF, Res Lab, Propuls Directorate, Wright Patterson AFB, OH 45433 USA.
RP Levin, GA (reprint author), USAF, Res Lab, Propuls Directorate, Wright Patterson AFB, OH 45433 USA.
NR 19
TC 18
Z9 18
U1 1
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD DEC
PY 2007
VL 20
IS 12
BP 1101
EP 1107
DI 10.1088/0953-2048/20/12/003
PG 7
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 248XJ
UT WOS:000252190200004
ER
PT J
AU Look, DC
AF Look, D. C.
TI Quantitative analysis of surface donors in ZnO
SO SURFACE SCIENCE
LA English
DT Article
DE zinc oxide; hall-effect; temperature dependence; surface conductivity;
donors; acceptors
ID DEVICES
AB At low temperatures, typically up to 30 K or even higher, the electrical properties of bulk ZnO samples are nearly always dominated by a conductive near-surface region. Here we show that a single, low-temperature Hall-effect measurement, say at 20 K, and a reasonable assumption regarding the upper limit of the surface compensation ratio, yields a value of surface donor concentration N-D,N-surf accurate to within about a factor two. Examples are given for bulk materials grown by the vapor-phase, melt, and hydrothermal processes. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Look, D. C.] Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
[Look, D. C.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Look, DC (reprint author), Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
EM david.look@wpafb.af.mil
NR 12
TC 35
Z9 35
U1 5
U2 22
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD DEC 1
PY 2007
VL 601
IS 23
BP 5315
EP 5319
DI 10.1016/j.susc.2007-09.030
PG 5
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 240WT
UT WOS:000251619600007
ER
PT J
AU Weld, KJ
Montiglio, C
Morris, MS
Bush, AC
Cespedes, RD
AF Weld, Kyle J.
Montiglio, Claudio
Morris, Michael S.
Bush, Anneke C.
Cespedes, R. Duane
TI Stones based on patient and stone computed tomography characteristics
shock wave lithotripsy success for renal
SO UROLOGY
LA English
DT Article
ID PERCUTANEOUS NEPHROLITHOTOMY; URETERAL CALCULI; URINARY CALCULI;
EXTRACORPOREAL; EXPERIENCE; LITHOSTAR; EFFICACY; DORNIER-HM3; CLEARANCE;
FRAGMENTS
AB OBJECTIVES To determine the patient and noncontrast computed tomography (NCCT) stone characteristics that predict either of 2 extracorporeal shock wave lithotripsy (ESWL) outcomes: stone-free (SF) status or ESWL success.
METHODS The records of 200 consecutive patients with nephrolithiasis treated with ESWL were reviewed. Patient age, sex, stone laterality, body surface area, body mass index, maximal stone dimension, mean stone Hounsfield units (HU), stone Hounsfield density, skin-to-stone distance (SSD), and intrarenal stone location were studied as potential predictors. Patients with no calcifications on postoperative kidneys, ureters, and bladder (KUB) at 6 weeks were defined as SF ESWL success was defined as SF or remaining stone fragments less than 4 mm.
RESULTS Intrarenal stone location was found to be the only predictor of SF status. Renal pelvic/ ureteropelvic junction (UPJ) stones cleared better than calyceal stones, and upper/middle calyceal stones cleared better than lower calyceal stones. Stone size, mean HU, and location predicted ESWL fragmentation success. Smaller stones and stones with lower mean HU levels were more successfully fragmented. Higher SF and ESWL success rates were found with a shorter SSD among calyceal stones when renal pelvic/UPJ stones were excluded from analysis.
CONCLUSIONS Stone location is the most important factor in achieving SF status after ESWL. NCCT stone characteristics such as stone size, mean HU, and intrarenal location are important predictors of ESWL success.
C1 [Weld, Kyle J.; Montiglio, Claudio; Morris, Michael S.; Bush, Anneke C.; Cespedes, R. Duane] MCSU, Wilford Hall USAF Med Ctr, Dept Urol, Lackland AFB, TX 78236 USA.
RP Weld, KJ (reprint author), MCSU, Wilford Hall USAF Med Ctr, Dept Urol, 220 Berquist Dr, Lackland AFB, TX 78236 USA.
EM Kyle.weld@lackland.af.mil
NR 27
TC 50
Z9 50
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0090-4295
J9 UROLOGY
JI Urology
PD DEC
PY 2007
VL 70
IS 6
BP 1043
EP 1046
DI 10.1016/j.urology.2007.07.074
PG 4
WC Urology & Nephrology
SC Urology & Nephrology
GA 263CE
UT WOS:000253194400002
PM 18158009
ER
PT J
AU Schaefer, DW
Justice, RS
AF Schaefer, Dale W.
Justice, Ryan S.
TI How nano are nanocomposites?
SO MACROMOLECULES
LA English
DT Review
ID ANGLE NEUTRON-SCATTERING; POLYMER/LAYERED SILICATE NANOCOMPOSITES;
SINGLE-WALLED NANOTUBES; CARBON NANOTUBES; POLYMER NANOCOMPOSITES;
ELASTIC PROPERTIES; MECHANICAL-PROPERTIES; ASPECT-RATIO; COMPOSITES;
MORPHOLOGY
AB Composite materials loaded with nanometer-sized reinforcing fillers are widely believed to have the potential to push polymer mechanical properties to extreme values. Realization of anticipated properties, however, has proven elusive. The analysis presented here traces this shortfall to the large-scale morphology of the filler as determined by small-angle X-ray scattering, light scattering, and electron imaging. We examine elastomeric, thermoplastic, and thermoset composites loaded with a variety of nanoscale reinforcing fillers such as precipitated silica, carbon nanotubes (single and multiwalled), and layered silicates. The conclusion is that large-scale disorder is ubiquitous in nanocomposites regardless of the level of dispersion, leading to substantial reduction of mechanical properties (modulus) compared to predictions based on idealized filler morphology.
C1 Univ Cincinnati, Dept Chem & Mat Engn, Cincinnati, OH 45221 USA.
USAF, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Schaefer, DW (reprint author), Univ Cincinnati, Dept Chem & Mat Engn, Cincinnati, OH 45221 USA.
EM dale.schaefer@uc.edu
RI USAXS, APS/D-4198-2013
NR 73
TC 383
Z9 398
U1 17
U2 143
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD NOV 27
PY 2007
VL 40
IS 24
BP 8501
EP 8517
DI 10.1021/ma070356w
PG 17
WC Polymer Science
SC Polymer Science
GA 233MH
UT WOS:000251094500001
ER
PT J
AU Smith, TC
Zamorski, M
Smith, B
Riddle, JR
LeardMann, CA
Wells, TS
Engel, CC
Hoge, CW
Adkins, J
Blaze, D
AF Smith, Tyler C.
Zamorski, Mark
Smith, Besa
Riddle, James R.
LeardMann, Cynthia A.
Wells, Timothy S.
Engel, Charles C.
Hoge, Charles W.
Adkins, Joyce
Blaze, Dan
CA Millennium Cohort Study Team
TI The physical and mental health of a large military cohort: baseline
functional health status of the Millennium Cohort
SO BMC PUBLIC HEALTH
LA English
DT Article
ID QUALITY-OF-LIFE; GULF-WAR VETERANS; IRAQ-WAR; GENDER DIFFERENCES; CARE
UTILIZATION; WOMEN VETERANS; WHITEHALL-II; US MILITARY; SF-36; PERSONNEL
AB Background: The US military is currently involved in large, lengthy, and complex combat operations around the world. Effective military operations require optimal health of deployed service members, and both mental and physical health can be affected by military operations.
Methods: Baseline data were collected from 77,047 US service members during 2001-2003 as part of a large, longitudinal, population-based military health study (the Millennium Cohort Study). The authors calculated unadjusted, adjusted, and weighted means for the Medical Outcomes Study Short Form 36-item Survey for Veterans physical (PCS) and mental component summary (MCS) scores over a variety of demographic and military characteristics at baseline.
Results: The unadjusted mean PCS and MCS scores for this study were 53.4 (95% confidence interval: 53.3-53.4) and 52.8 (95% confidence interval: 52.7-52.9). Average PCS and MCS scores were slightly more favorable in this military sample compared to those of the US general population of the same age and sex. Factors independently associated with more favorable health status included male gender, being married, higher educational attainment, higher military rank, and Air Force service. Combat specialists had similar health status compared to other military occupations. Having been deployed to Southwest Asia, Bosnia, or Kosovo between 1998 and 2000 was not associated with diminished health status.
Conclusion: The baseline health status of this large population-based military cohort is better than that of the US general population of the same age and sex distribution over the same time period, especially in older age groups. Deployment experiences during the period of 1998-2001 were not associated with decreased health status. These data will serve as a useful reference for other military health studies and for future longitudinal analyses.
C1 [Smith, Tyler C.; Smith, Besa; LeardMann, Cynthia A.] USN, Hlth Res Ctr, US Dept Def, Ctr Deployment Hlth Res, San Diego, CA USA.
[Zamorski, Mark] Univ Ottawa, Dept Family Med, Ottawa, ON, Canada.
[Zamorski, Mark] Canadian Forces Hlth Serv Grp Headquarters, Directorate Med Policy, Deployment Hlth Sect, Ottawa, ON, Canada.
[Engel, Charles C.] Walter Reed Army Med Ctr, Deployment Hlth Clin Ctr, Silver Spring, MD USA.
[Riddle, James R.; Wells, Timothy S.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Hoge, Charles W.] Walter Reed Army Inst Res, Dept Psychiat & Behav Sci, Silver Spring, MD USA.
[Adkins, Joyce] Pentagon, Off Assistant Secretary Def Hlth Affairs, Force Hlth Protect, Washington, DC USA.
[Blaze, Dan] Duke Univ, Med Ctr, Durham, NC USA.
RP Smith, TC (reprint author), USN, Hlth Res Ctr, US Dept Def, Ctr Deployment Hlth Res, San Diego, CA USA.
EM Tyler.Smith2@med.navy.mil; Zamorski.MA@forces.gc.ca;
Besa.Smith@med.navy.mil; James.Riddle@wpafb.af.mil;
Cynthia.LeardMann@med.navy.mil; Timothy.Wells@wpafb.af.mil;
Charles.Engel@na.amedd.army.mil; Charles.Hoge@na.amedd.army.mil;
Joyce.Adkins@deploymenthealth.osd.mil; blaze001@mc.duke.edu
NR 64
TC 45
Z9 46
U1 1
U2 2
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 NOV 26
PY 2007
VL 7
AR 340
DI 10.1186/1471-2458-7-340
PG 13
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 256LD
UT WOS:000252729400001
PM 18039387
ER
PT J
AU Yeom, S
Javidi, B
Lee, CW
Watson, E
AF Yeom, Seokwon
Javidi, Bahram
Lee, Chae-wook
Watson, Edward
TI Photon-counting passive 3D image sensing for reconstruction and
recognition of partially occluded objects
SO OPTICS EXPRESS
LA English
DT Article
ID PHOTODIODES; DISPLAY; DESIGN; ARRAY
AB In this paper, we discuss the reconstruction and the recognition of partially occluded objects using photon counting integral imaging (II). Irradiance scenes are numerically reconstructed for the reference target in three-dimensional (3D) space. Photon counting scenes are estimated for unknown input objects using maximum likelihood estimation (MLE) of Poisson parameter. We propose nonlinear matched filtering in 3D space to recognize partially occluded targets. The recognition performance is substantially improved from the nonlinear matched filtering of elemental images without 3D reconstruction. The discrimination capability is analyzed in terms of Fisher ratio (FR) and receiver operating characteristic (ROC) curves. (c) 2007 Optical Society of America.
C1 Daegu Univ, Sch Comp & Commun Engn, Gyeongbuk 712714, South Korea.
Univ Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Yeom, S (reprint author), Daegu Univ, Sch Comp & Commun Engn, Gyeongbuk 712714, South Korea.
EM yeom@daegu.ac.kr; bahram@engr.uconn.edu; cwlee@daegu.ac.kr;
Edward.Watson@wpafb.af.mil
NR 24
TC 15
Z9 15
U1 0
U2 3
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD NOV 26
PY 2007
VL 15
IS 24
BP 16189
EP 16195
DI 10.1364/OE.15.016189
PG 7
WC Optics
SC Optics
GA 235HI
UT WOS:000251223900057
PM 19550906
ER
PT J
AU Shackelford, SA
Menapace, JA
Goldman, JF
AF Shackelford, S. A.
Menapace, J. A.
Goldman, J. F.
TI Liquid state thermochemical decomposition of neat
1,3,5,5-tetranitrohexahydropyrimidine (DNNC) and its DNNC-d(2),
DNNC-d(4), DNNC-d(6) structural isotopomers: Mechanistic entrance into
the DNNC molecule
SO THERMOCHIMICA ACTA
LA English
DT Article; Proceedings Paper
CT 35th International Conference of ICT
CY JUN 29-JUL 02, 2004
CL Karlsruhe, GERMANY
DE 1,3,5,5-tetranitrohexahydropyrimidine; DNNC; liquid state decomposition;
deuterium isotope effect; KDIE
ID CONDENSED-PHASE DECOMPOSITION; GASEOUS PYROLYSIS PRODUCTS;
THERMAL-DECOMPOSITION; ENERGETIC MATERIALS; TEMPORAL BEHAVIORS; IMPACT
REACTIVITY; LABELED ANALOG;
OCTAHYDRO-1,3,5,7-TETRANITRO-1,3,5,7-TETRAZOCINE;
1,3,5-TRINITROHEXAHYDRO-S-TRIAZINE; RATES
AB Global kinetics for the liquid state thermochemical decomposition of neat 1,3,5,5-tetranitrohexahydropyrimidine (DNNC), perdeuterio-labeled DNNC-d(6), and partially deuterium-labeled DNNC-d(2) and DNNC-d(4) isotopomers were obtained by isothermal differential scanning calorimetry (IDSC). Molecular kinetic deuterium isotope effect (KDIE) values obtained with DNNC and DNNC-d6 from 174 to 194 degrees C revealed that C-H bond rupture regulates both an endothermic catalytic initiation and the exothermic propagation of the liquid thermochemical decomposition process. Using IDSC-based KDIE comparisons with the DNNC-d2, DNNC-d4, and DNNC-d6 isotopomers, a more detailed chemical structure/mechanistic relationship emerged by entering the interior of the DNNC molecule. Here structural kinetic KDIE results showed the rate-controlling C-H bond rupture has its origin at the non-equivalent C-2 methylene group sandwiched between the two nitrated DNNC nitrogen ring atoms, versus at the chemically equivalent C-4 and C-6 methylene ring positions located elsewhere in the DNNC molecule. Elucidation of such mechanistic features should aid in the structural design of new high-energy compounds with improved thermochemical properties. A 170.0 kJ/mol activation energy appeared for the endothermic induction period, and a lower 104.2 kJ/mol activation energy was determined for the exothermic acceleratory portion of the DNNC decomposition process. The global liquid and solid state thermochemical decomposition processes for DNNC are compared. Published by Elsevier B.V.
C1 AFRL, PRSP, Edwards AFB, CA 93524 USA.
USAF Acad, FJSRL, Directorate Chem Sci, Colorado Springs, CO 80840 USA.
USAF Acad, Dept Chem, Colorado Springs, CO 80840 USA.
RP Shackelford, SA (reprint author), AFRL, PRSP, 10 E Saturn Blvd, Edwards AFB, CA 93524 USA.
EM scott.shackelford@edwards.af.mil
NR 47
TC 1
Z9 1
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0040-6031
J9 THERMOCHIM ACTA
JI Thermochim. Acta
PD NOV 25
PY 2007
VL 464
IS 1-2
BP 42
EP 58
DI 10.1016/j.tca.2007.08.005
PG 17
WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical
SC Thermodynamics; Chemistry
GA 230NT
UT WOS:000250883900007
ER
PT J
AU Dirama, TE
Johnson, JA
AF Dirama, Taner E.
Johnson, Joel A.
TI Conformation and dynamics of arylthiol self-assembled monolayers on
Au(111)
SO LANGMUIR
LA English
DT Article
ID CHAIN-LENGTH DEPENDENCE; MOLECULAR-DYNAMICS; FORCE-FIELD; ALKANETHIOL
MONOLAYERS; IN-SITU; GOLD; SURFACE; SPECTROSCOPY; SIMULATIONS;
MICROSCOPY
AB We report a computational investigation of the conformation and the dynamics of self-assembled monolayers (SAMs) of a set of aromatic thiols arranged in the (root 3 x root 3)-R30 degrees packing ratio on a Au(111) surface using molecular dynamics (MD) simulations. It was found that the molecular conformations were better defined for the arylthiol with two phenyl groups as compared to those with a single phenyl group and that the chemical structure of the head and tail groups had a considerable influence on the system geometry. In line with the density functional theory (DFT) calculations of small thiol molecules, we found for the SAMs that the face-centered cubic (fee) site on the Au(111) surface was the most preferred, followed by the hexagonal close-packed (hcp) site, while the bridge position showed the characteristics of a local energy maximum. The dynamics of thiol head groups on these three Au sites was found to govern the overall dynamics of SAMs as measured by the mean square displacement. We also report that both the conformation and the dynamics on the studied time scale were driven by the SAM formation energy.
C1 Universal Technol Corp, Dayton, OH 45432 USA.
USAF, Res Lab, Coatings Res Grp,Mat & Mfg Directorate, Nonstruct Mat Branch,Nonmet Mat Div, Wright Patterson AFB, OH 45433 USA.
RP Dirama, TE (reprint author), Universal Technol Corp, 1270 N Fairfield Rd, Dayton, OH 45432 USA.
EM taner.dirama@afmcx.net
NR 47
TC 14
Z9 14
U1 2
U2 20
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD NOV 20
PY 2007
VL 23
IS 24
BP 12208
EP 12216
DI 10.1021/la7015963
PG 9
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 231VG
UT WOS:000250976700046
PM 17958384
ER
PT J
AU Zheng, X
Forest, MG
Vaia, R
Arlen, M
Zhou, R
AF Zheng, Xiaoyu
Forest, M. Gregory
Vaia, Richard
Arlen, Michael
Zhou, Ruhai
TI A strategy for dimensional percolation in sheared nanorod dispersions
SO ADVANCED MATERIALS
LA English
DT Article
ID SHORT-FIBER COMPOSITES; ELECTRICAL-CONDUCTIVITY; NEMATIC POLYMERS;
CONTINUUM PERCOLATION; EXCLUDED-VOLUME; PHASE-DIAGRAM; WEAK SHEAR;
STICKS; NANOCOMPOSITES; ANISOTROPY
AB Dimensional percolation thresholds of sheared nanorod dispersions are characterized with a novel 3-part numerical strategy. Nanorod probability distribution functions (PDFs) are computed versus shear rate and volume fraction, including rotational diffusion and excluded-volume interactions. A Monte Carlo algorithm draws from each PDF to populate physical shear-processed monodomains. A data-mining algorithm yields nanoparticle percolation statistics in all directions relative to the flow (x), flow-gradient (y), and vorticity (z) axes.
C1 Univ N Carolina, Dept Math, Chapel Hill, NC 27515 USA.
Univ N Carolina, Inst Adv Mat, Chapel Hill, NC USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
Kent State Univ, Dept Math Sci, Kent, OH 44242 USA.
Old Dominion Univ, Dept Math & Stat, Norfolk, VA 23529 USA.
RP Forest, MG (reprint author), Univ N Carolina, Dept Math, Chapel Hill, NC 27515 USA.
EM forest@amath.unc.edu; richard.vaia@wpafb.af.mil
NR 38
TC 26
Z9 26
U1 1
U2 16
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0935-9648
J9 ADV MATER
JI Adv. Mater.
PD NOV 19
PY 2007
VL 19
IS 22
BP 4038
EP +
DI 10.1002/adma.200700011
PG 7
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 237OE
UT WOS:000251383900051
ER
PT J
AU Carlson, HC
Pedersen, T
Basu, S
Keskinen, M
Moen, J
AF Carlson, Herbert C.
Pedersen, Todd
Basu, Santimay
Keskinen, Mike
Moen, Joran
TI Case for a new process, not mechanism, for cusp irregularity production
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID INTERPLANETARY MAGNETIC-FIELD; GRADIENT DRIFT INSTABILITY; HIGH-LATITUDE
IONOSPHERE; HF RADAR BACKSCATTER; POLAR-CAP; NONLINEAR EVOLUTION;
F-REGION; PLASMA; DENSITY; PATCHES
AB Two plasma instability mechanisms are currently thought to dominate formation of plasma irregularities in the F region high-latitude and polar ionosphere: the gradient-drift driven instability and velocity-shear driven instability. The former mechanism is accepted as accounting for structuring plasma in polar cap patches and the latter for structuring plasma in polar cap Sun-aligned arcs. Recent work has established a dominant patch formation process, involving magnetic reconnection driving strong plasma shears repeatedly observed in the cusp. Proceeding from this, we present the case for a needed new plasma structuring process (not new mechanism), whereby shear-driven instabilities first rapidly structure the entering plasma, after which gradient drift instabilities build on these large '' seed '' irregularities. Correct modeling of cusp and early polar cap patch structuring will not be accomplished without allowing for this compound process. This compound process also explains previously unexplained characteristics of cusp and early polar cap patch irregularities.
C1 [Carlson, Herbert C.] Utah State Univ, Ctr Atmospher & Space Sci, Logan, UT 84322 USA.
[Pedersen, Todd; Basu, Santimay] AF Res Lab, VSBXI, Hanscom AFB, MA USA.
[Keskinen, Mike] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Moen, Joran] Univ Ctr Svalbard, Longyearbyen, Svalbard, Norway.
[Moen, Joran] Univ Oslo, Dept Phys, Oslo, Norway.
RP Carlson, HC (reprint author), Utah State Univ, Ctr Atmospher & Space Sci, 4405 Old Main Hill, Logan, UT 84322 USA.
EM berb.carlson@afosr.af.mil
OI Pedersen, Todd/0000-0002-6940-0112
NR 35
TC 31
Z9 31
U1 0
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD NOV 16
PY 2007
VL 112
IS A11
AR A11304
DI 10.1029/2007JA012384
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 233AO
UT WOS:000251063000005
ER
PT J
AU Conrad, AR
Dumas, C
Merline, WJ
Drummond, JD
Campbell, RD
Goodrich, RW
Le Mignant, D
Chaffee, FH
Fusco, T
Kwok, SH
Knight, RI
AF Conrad, A. R.
Dumas, C.
Merline, W. J.
Drummond, J. D.
Campbell, R. D.
Goodrich, R. W.
Le Mignant, D.
Chaffee, F. H.
Fusco, T.
Kwok, S. H.
Knight, R. I.
TI Direct measurement of the size, shape, and pole of 511 Davida with Keck
AO in a single night
SO ICARUS
LA English
DT Article
DE asteroids, rotation; adaptive optics
ID ADAPTIVE OPTICS IMAGES; ASTEROID 253 MATHILDE; COLLISIONAL HISTORY; BELT
AB Using the high-quality data set of 165 images taken at 11 epochs over the 5.13 h rotation of the large C-type Asteroid 511 Davida, we find the dimensions of its triaxial ellipsoid model to be 357 +/- 2 x 294 +/- 2 x 231 +/- 50 km. The images were acquired with the adaptive optics system on the 10 m Keck II telescope on December 27, 2002. The a and b diameters are much better determined than previously estimated from speckle interferometry and indirect measurements, and our mean diameter, (abc)(1/3) = 289 +/- 21 km, is 19% below previous estimates. We find the pole to lie within 2 degrees of [RA = 295 degrees; Dec = 0 degrees] or in Ecliptic coordinates [lambda = 297 degrees; beta = +21 degrees], a significant improvement to the pole direction. Otherwise, previous determinations of the axial ratios agree with our new results. These observations illustrate that our technique of finding the dimensions and pole of an asteroid from its changing projected size and shape is very powerful because it can be done in essentially one night as opposed to decades of lightcurves. Average departures of 3% (5 km) of the asteroid's mean radius from a smooth outline are detected, with at least two local positive-relief features and at least one flat facet showing approximately 15 km deviations from the reference best-fit ellipsoid. The facet is reminiscent of large global-scale craters on Asteroid 253 Mathilde (also a C-type) when seen edge-on in close-up images from the NEAR mission flyby. We show that giant craters (up to 150 km diameter, the size of the largest facets seen on Davida) can be expected from the impactor size distribution, without likelihood of catastrophic disruption of Davida. (C) 2007 Elsevier Inc. All rights reserved.
C1 [Conrad, A. R.; Campbell, R. D.; Goodrich, R. W.; Le Mignant, D.; Chaffee, F. H.; Kwok, S. H.] WM Keck Observ, Kamuela, HI 96743 USA.
[Dumas, C.] European So Observ, ESO Very Large Telescope, Santiago 19, Chile.
[Merline, W. J.] SW Res Inst, Boulder, CO 80302 USA.
[Drummond, J. D.] AF Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Fusco, T.] Off Natl Etud & Rech Aerosp, DOTA E, F-92322 Chatillon, France.
[Knight, R. I.] Univ Hawaii, Hilo, HI 96720 USA.
RP Conrad, AR (reprint author), WM Keck Observ, 65-1120 Mamalahoa Highway, Kamuela, HI 96743 USA.
EM aconrad@keck.hawaii.edu
NR 27
TC 14
Z9 14
U1 0
U2 0
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0019-1035
J9 ICARUS
JI Icarus
PD NOV 15
PY 2007
VL 191
IS 2
BP 616
EP 627
DI 10.1016/j.icarus.2007.05.004
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 240LQ
UT WOS:000251589500014
ER
PT J
AU Bai, ZW
Price, GE
Yoonessi, M
Juhl, SB
Durstock, MF
Dang, TD
AF Bai, Zongwu
Price, Gary E.
Yoonessi, Mitra
Juhl, Shane B.
Durstock, Michael F.
Dang, Thuy D.
TI Proton exchange membranes based on sulfonated
polyarylenethioethersulfone and sulfonated polybenzimidazole for fuel
cell applications
SO JOURNAL OF MEMBRANE SCIENCE
LA English
DT Article
ID COMPOSITE MEMBRANES; CONDUCTIVITY; ELECTROLYTES; POLYMERS; BLENDS
AB Novel polymer composite membranes composed of sulfonated polyarylenethioether sulfone (SPTES) and sulfonated polybenzimidazole (SPBI) were prepared by solution casting with the composition of SPTES in the varied range from 30 to 70 wt%. The proton conductivity of the composite membranes was measured by four probe impedance spectroscopy at different temperatures. The highest proton conductivity (up to 100 mS/cm) was found for the SPTES/SPBI (70/30) polymer composite membrane at 85 degrees C, 85% relative humidity, and proton conductivity increased when the SPTES content increased. X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and Atomic Force Microscopy (AFM) were used to confirm the presence of SPBI in the composite membranes as well as the dispersion of SPBI The results indicated that membranes showed a good perspective as proton exchange membrane (PEM) for fuel cell applications. (c) 2007 Elsevier B.V. All rights reserved.
C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA.
MLBP, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Bai, ZW (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
EM zongwu.bai@wpafb.af.mil; thuy.dang@wpatb.af.mil
NR 16
TC 41
Z9 43
U1 2
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0376-7388
J9 J MEMBRANE SCI
JI J. Membr. Sci.
PD NOV 15
PY 2007
VL 305
IS 1-2
BP 69
EP 76
DI 10.1016/j.memsci.2007.07.034
PG 8
WC Engineering, Chemical; Polymer Science
SC Engineering; Polymer Science
GA 230QI
UT WOS:000250890600009
ER
PT J
AU Jeon, IY
Tan, LS
Baek, JB
AF Jeon, In-Yup
Tan, Loon-Seng
Baek, Jong-Beom
TI Synthesis of linear and hyperbranched poly(etherketone)s containing
flexible oxyethylene spacers
SO JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
LA English
DT Article
DE electrophilic substitution reaction; high performance polymers;
hyperbranched linear; poly(etherketone); polyphosphoric acid
ID MULTIWALLED CARBON NANOTUBES; POLYPHOSPHORIC ACID; NANOFIBERS;
POLY(OXY-1,3-PHENYLENECARBONYL-1,4-PHENYLENE); POLYETHERKETONES;
ACID/P2O5
AB As an alternative to strong acid reaction media for the Friedel-Crafts acylation for a polymer-forming reaction, a mild polyphosphoric acid (PPA) with optimized amount of phosphorous pentoxide (P2O5) has been tested for the polymerization of AB monomers 4-(2-phenoxyethoxy)benzoic acid and 3-(2-phenoxyethoxy) benzoic acid, and an AB(2) monomer 3,5-bis(2-phenoxyethoxy)benzoic acid. The reaction progress of AB2 monomer was conveniently traced by FTIR spectroscopy monitoring aromatic ketone (C=O) stretching bands arisen from carboxylic acid groups at the chain ends and carbonyl groups in the backbone as a function of reaction time at 110 CC. The resultant linear and hyperbranched polymers containing flexible oxyethylene spacers, which were prone to be hydrolyzed in strong acids at elevated temperature, displayed high intrinsic viscosities. Thus, the reaction medium PPA/P2O5 mixture as an electrophilic substitution reaction was indeed benign not to depolymerize growing polymer molecules but strong enough for the direct generation of carbonium ion from carboxylic acid to promote efficient polymerization. The resultant hyperbranched poly(etherketone) (PEK) displayed the best solubility among samples. All PEKs showed good thermal stability; glass transition temperatures were in the range of 90-117 degrees C 5% weight loss generally occurred at greater than 345 degrees C in air. (c) 2007 Wiley Periodicals, Inc.
C1 Chungbuk Natl Univ, Sch Chem Engn, Cheongju 361763, Chungbuk, South Korea.
USAF, Polymer Branch, Mat & Mfg Directorate, AFRL MLBP,Res Lab, Dayton, OH 45433 USA.
RP Baek, JB (reprint author), Chungbuk Natl Univ, Sch Chem Engn, Cheongju 361763, Chungbuk, South Korea.
EM jbbaek@chungbuk.ac.kr
RI Baek, Jong-Beom/E-5883-2010; Tan, Loon-Seng/F-6985-2012
OI Baek, Jong-Beom/0000-0003-4785-2326; Tan, Loon-Seng/0000-0002-2134-9290
NR 25
TC 3
Z9 3
U1 1
U2 4
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0887-624X
J9 J POLYM SCI POL CHEM
JI J. Polym. Sci. Pol. Chem.
PD NOV 15
PY 2007
VL 45
IS 22
BP 5112
EP 5122
DI 10.1002/pola.22253
PG 11
WC Polymer Science
SC Polymer Science
GA 229FN
UT WOS:000250788600009
ER
PT J
AU Khalfan, AN
Sanchez, LM
Kodiweera, C
Greenbaum, SG
Bai, ZW
Dang, TD
AF Khalfan, Amish N.
Sanchez, Luz M.
Kodiweera, Chandana
Greenbaum, Steve G.
Bai, Zongwu
Dang, Thuy D.
TI Water and proton transport properties of hexafluorinated sulfonated
poly(arylenethioethersulfone) copolymers for applications to proton
exchange membrane fuel cells
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE proton exchange membrane; pulsed-field gradient; water transport; proton
conductivity; water retention; nuclear magnetic resonance
ID POLYARYLENETHIOETHER SULFONES; METHANOL; NAFION
AB In the present study, we examine the water and proton transport properties of hexafluorinated sulfortated poly(arylenethioethersulfone) (6F-SPTES) copolymer membranes for applications to proton exchange membrane fuel cells (PEMFCs). The 6F-SPTES copolymer membranes build upon the structures of previously studied sulfonated poly(arylenethioethersulfone) (SPTES) copolymer membranes to include CF3 functional groups in efforts to strengthen water retention and extend membrane performance at elevated temperatures (above 120 degrees C. The 6F-SPTES copolymer membranes sustain higher water self-diffusion and greater proton conductivities than the commercial Nalion (R) membrane. Water diffusion studies of the 6F-SPTES copolymer membranes using the pulsed-field gradient spin-echo NMR technique reveal, however, the fluorinated membranes to be somewhat unfavorable over their non-fluorinated counterparts as high temperature membranes. In addition, proton conductivity measurements of the fluorinated membranes up to 85 degrees C show comparable results with the non-fluorinated SPTES membranes. (C) 2007 Elsevier B.V. All rights reserved.
C1 CUNY Hunter Coll, Dept Phys, New York, NY 10021 USA.
Univ Dayton, Res Inst, Dayton, OH 45469 USA.
USAF, Res Lab, MLBP, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Greenbaum, SG (reprint author), CUNY Hunter Coll, Dept Phys, 695 Pk Ave, New York, NY 10021 USA.
EM steve.greenbaum@hunter.cuny.edu
OI Kodiweera, Chandana/0000-0002-6576-8534
NR 16
TC 8
Z9 8
U1 0
U2 4
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 NOV 15
PY 2007
VL 173
IS 2
BP 853
EP 859
DI 10.1016/j.jpowsour.2007.08.016
PG 7
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 231FQ
UT WOS:000250932300031
ER
PT J
AU Shaw, LL
Larsen, JM
Liaw, PK
Mughrabi, H
Endo, M
Kostorz, G
AF Shaw, Leon L.
Larsen, James M.
Liaw, Peter K.
Mughrabi, Hael
Endo, Masahiro
Kostorz, Gernot
TI Special Issue - The McEvily symposium: Fatigue and fracture of
traditional and advanced materials, TMS 2006
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Editorial Material
C1 Univ Connecticut, Storrs, CT 06269 USA.
AF Res Lab, Wright Patterson AFB, OH USA.
Univ Tennessee, Knoxville, TN 37996 USA.
Univ Erlangen Nurnberg, D-8520 Erlangen, Germany.
Fukuoka Univ, Fukuoka, Japan.
Swiss Fed Inst Technol, Zurich, Switzerland.
RP Shaw, LL (reprint author), Univ Connecticut, Storrs, CT 06269 USA.
EM leon.shaw@uconn.edu
RI kostorz, gernot/B-6489-2009
NR 0
TC 0
Z9 0
U1 0
U2 2
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 NOV 15
PY 2007
VL 468
SI SI
BP 1
EP 1
DI 10.1016/j.msea.2007.02.013
PG 1
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 222EJ
UT WOS:000250278600001
ER
PT J
AU Golden, PJ
Shepard, MJ
AF Golden, Patrick J.
Shepard, Michael J.
TI Life prediction of fretting fatigue with advanced surface treatments
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT McEvily Symposium on Fatigue and Fracture of Traditional and Advanced
Materials
CY MAR 12-16, 2006
CL San Antonio, TX
SP TMS
DE fretting; Ti-6AI-4V; DLC; laser shock processing; low plasticity
burnishing; life prediction
ID DIAMOND-LIKE CARBON; FRACTURE-MECHANICS; TI-6AL-4V; COATINGS; CONTACTS;
WEAR; STRESS; CRACK; DLC
AB Laboratory fretting results with diamond like carbon coating, low plasticity burnishing, and laser shock processing as well as with no surface treatments are presented. A method of life prediction for a dovetail type specimen is demonstrated with the laboratory results. In general, the life prediction calculations agree with the laboratory results when the appropriate coefficient of friction and compressive residual stresses are accounted for in the analysis. The assumptions made in the analysis are qualitatively confirmed with experimental observations. Published by Elsevier B.V.
C1 AFRL, MLLMN, Wright Patterson AFB, OH 45433 USA.
RP Golden, PJ (reprint author), AFRL, MLLMN, Wright Patterson AFB, OH 45433 USA.
EM patrick.golden@wpafb.af.mil
NR 30
TC 19
Z9 20
U1 4
U2 21
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 NOV 15
PY 2007
VL 468
SI SI
BP 15
EP 22
DI 10.1016/j.msea.2006.10.168
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 222EJ
UT WOS:000250278600004
ER
PT J
AU Jha, SK
Caton, MJ
Larsen, JM
AF Jha, S. K.
Caton, M. J.
Larsen, J. M.
TI A new paradigm of fatigue variability behavior and implications for life
prediction
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT McEvily Symposium on Fatigue and Fracture of Traditional and Advanced
Materials
CY MAR 12-16, 2006
CL San Antonio, TX
SP TMS
DE fatigue variability; alpha plus beta titanium alloy; nickel-base
superalloy; life-limiting behavior; microstructure; probability of
failure
ID CRACK INITIATION PROCESS; P/M SUPER-ALLOYS; CYCLE FATIGUE;
TITANIUM-ALLOY; FAILURE MODES; PM ALLOYS; DEFECTS; SURFACE; ORIGINS
AB The treatment of the fatigue variability behavior has traditionally been based on the understanding of the mean-lifetime behavior. With reference to two turbine engine materials, an alpha + beta titanium alloy and a nickel-based superalloy, it is shown that the traditional approach may not accurately describe the fatigue variability behavior of these materials. Decreases in stress level, or microstructurral change directed at increasing the mean lifetime, were found to affect mean and worst-case (life-limiting) fatigue behavior differently, and these differences could not be accounted for in the traditional understanding. In particular, the life-limiting mechanism was controlled by crack growth although the mean-lifetime response was increasingly dominated by crack initiation with decreasing stress level. A new paradigm of fatigue variability was therefore suggested, in which the total uncertainty in lifetime breaks down into the variability in (1) the worst-case mechanism and that in (2) the classical, mean-lifetime governing response. The effects of microstructure and temperature on the fatigue variability behavior were studied with respect to the new paradigm and found to have a very systematic effect on the worst-case and the mean behavior, depending on the degree of influence of these variables on the crack initiation and the growth regime. (c) 2007 Elsevier B.V. All rights reserved.
C1 Universal Technol Corp, Dayton, OH 45432 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45431 USA.
RP Jha, SK (reprint author), Universal Technol Corp, Dayton, OH 45432 USA.
EM Sushantjha@hotmail.com
NR 34
TC 46
Z9 46
U1 2
U2 13
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 NOV 15
PY 2007
VL 468
SI SI
BP 23
EP 32
DI 10.1016/j.msea.2006.10.171
PG 10
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 222EJ
UT WOS:000250278600005
ER
PT J
AU Millwater, H
Larsen, J
John, R
AF Millwater, Harry
Larsen, James
John, Reji
TI Effects of residual stresses on probabilistic lifing of engine disk
materials
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT McEvily Symposium on Fatigue and Fracture of Traditional and Advanced
Materials
CY MAR 12-16, 2006
CL San Antonio, TX
SP TMS
DE probabilistic residual stress; shot peening; compressor disk;
probabilistic sensitivities
ID COLD-FORMED STEEL; STRUCTURAL RELIABILITY
AB Residual stresses are known to be beneficial with respect to fatigue life of metal components. Shot peening or other techniques are frequently used to improve fatigue performance. This study uses a probabilistic methodology to examine the significance of the residual stress, obtained from shot peening, on the crack growth fatigue life. Specifically, the residual stress at a bolthole in a compressor disk composed of a superalloy is modeled as a random variable in addition to the initial crack size, crack propagation scatter and stress scatter random variables. The probabilistic sensitivities of the predicted probability-of-fracture with respect to the parameters of the random variables are computed and comprise a metric for assessing the significance of the residual stress on reducing the probability-of-fracture. Published by Elsevier B.V.
C1 Univ Texas, Dept Engn Mech, San Antonio, TX 78285 USA.
USAF, Res Lab, MLLM AFRL, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Millwater, H (reprint author), Univ Texas, Dept Engn Mech, San Antonio, TX 78285 USA.
EM harry.millwater@utsa.edu
NR 22
TC 3
Z9 6
U1 0
U2 4
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 NOV 15
PY 2007
VL 468
SI SI
BP 129
EP 136
DI 10.1016/j.msea.2006.10.169
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 222EJ
UT WOS:000250278600019
ER
PT J
AU Jiang, XP
Man, CS
Shepard, MJ
Zhai, T
AF Jiang, X. P.
Man, C.-S.
Shepard, M. J.
Zhai, T.
TI Effects of shot-peening and re-shot-peening on four-point bend fatigue
behavior of Ti-6Al-4V
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT McEvily Symposium on Fatigue and Fracture of Traditional and Advanced
Materials
CY MAR 12-16, 2006
CL San Antonio, TX
SP TMS
DE shot-peening; re-shot-peening; four-point bend fatigue; Ti-6Al-4V alloy
ID RESIDUAL-STRESS RELAXATION; HIGH-CYCLE FATIGUE; FRETTING FATIGUE;
MICROSTRUCTURE; TITANIUM; GROWTH
AB The application of shot-peening to improve performance and reduce scatter in the high cycle fatigue regime is common in aerospace production practice. Frequently, aerospace components are re-shot-peened during refit to "restore" compressive stresses that may have redistributed in service. Since shot-peening is an impact process that can cause various surface artifacts, it is not clear what effect this re-shot-peening process has on fatigue properties. In the current study, the effects of shot-peening and re-shot-peening on the profile of surface residual stress and the four-point bend fatigue behavior of Ti-6Al-4V(wt.%) alloy were investigated at room temperature and 150 degrees C. A step-test method was used to determine the fatigue strength of the shot-peened and re-shot-peened specimens in different conditions. Shot-peening improved the fatigue strength of the alloy from about 65% sigma(y) to 71% sigma(y) (sigma(y) is the yield strength of this alloy at room temperature). The fatigue limits of the shot-peened Ti-6Al-4V alloy at room temperature and 150 degrees C were found to be almost identical. Residual stresses did not seem to redistribute significantly under the fatigue loading at room temperature and 150 degrees C. Both shot-peening and re-shot-peening significantly enhanced the fatigue strength over that of the un-shot-peened alloy. No negative effects of re-shot-peening were observed. (c) 2007 Elsevier B.V. All rights reserved.
C1 Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA.
Univ Kentucky, Dept Math, Lexington, KY 40506 USA.
USAF, Res Lab, Mat & Mfg Directorate, WPAFB, Wright Patterson AFB, OH 45433 USA.
RP Zhai, T (reprint author), Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA.
EM tzhai@engr.uky.edu
RI Man, Chi-Sing/E-4794-2011
OI Man, Chi-Sing/0000-0001-9166-2832
NR 23
TC 26
Z9 29
U1 2
U2 27
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 NOV 15
PY 2007
VL 468
SI SI
BP 137
EP 143
DI 10.1016/j.msea.2007.01.156
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 222EJ
UT WOS:000250278600020
ER
PT J
AU Klingenberg, ML
Naguy, DA
Naguy, TA
Straw, RJ
Joseph, C
Mongelli, GA
Nelson, GC
Denny, SL
Arthur, JJ
AF Klingenberg, Melissa L.
Naguy, Debora A.
Naguy, Thomas A.
Straw, Randall J.
Joseph, Christopher
Mongelli, Gerard A.
Nelson, Georgette C.
Denny, Shanna L.
Arthur, James J.
TI Transitioning laser technology to support air force depot transformation
needs
SO SURFACE & COATINGS TECHNOLOGY
LA English
DT Article
DE laser decoating; Nd : YAG; carbon dioxide; laser; portable hand-held
laser coating removal system; coating removal rate; mechanical
properties
AB The U.S. Air Force and the Environmental Security Technology Certification Program (ESTCP) funded a multi-year collaborative project to test the ability of portable hand-held laser coating removal systems (PLCRS) to remove organic coatings from metallic and non-metallic substrates in an effort to reduce the use of hazardous chemicals and/or solid waste generated from more conventional removal methods. A 250 W carbon dioxide, 40 W neodymium: yttrium, aluminum, garnet (Nd:YAG), and 120 W Nd:YAG laser systems were evaluated for removing a variety of primer and topcoat combinations on 2024 T-3 and 7075 T-6 (bare and aluminum clad with chromate conversion coatings or chromic acid anodize), 4130 steel, honeycomb materials, Kevlar, graphite epoxy, and fiberglass epoxy substrates. Engineering tests were conducted to assess coating removal rate, physical substrate damage, modification of substrate properties, and impact on subsequent paint adhesion. The results of engineering tests were compared to baseline data (i.e., virgin material) and test data available in the literature for conventional coating removal techniques. (C) 2007 Published by Elsevier B.V.
C1 Concurrent Technol Corp, Johnstown, PA 15904 USA.
USAF, Mat Command A4N, Wright Patterson AFB, OH 45433 USA.
USAF, Res Lab, MLSC, Wright Patterson AFB, OH 45433 USA.
Univ Dayton, Res Inst, Dayton, OH 45469 USA.
Concurrent Technol Corp, Fairborn, OH 45324 USA.
Concurrent Technol Corp, Pittsburgh, PA 15219 USA.
RP Klingenberg, ML (reprint author), Concurrent Technol Corp, 100 CTC Dr, Johnstown, PA 15904 USA.
EM klingenb@ctc.com
NR 11
TC 2
Z9 2
U1 0
U2 1
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0257-8972
J9 SURF COAT TECH
JI Surf. Coat. Technol.
PD NOV 15
PY 2007
VL 202
IS 1
BP 45
EP 57
DI 10.1016/j.surfcoat.2007.04.056
PG 13
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA 230QA
UT WOS:000250889800005
ER
PT J
AU Demidov, VI
DeJoseph, CA
Simonov, VY
AF Demidov, V. I.
DeJoseph, C. A., Jr.
Simonov, V. Ya.
TI Gas-discharge plasma sources for nonlocal plasma technology
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID AFTERGLOW
AB Nonlocal plasma technology is based on the effect of self-trapping of fast electrons in the plasma volume [V. I. Demidov, C. A. DeJoseph, Jr., and A. A. Kudryavtsev, Phys. Rev. Lett. 95, 215002 (2006)]. This effect can be achieved by changing the ratio of fast electron flux to ion flux incident on the plasma boundaries. This in turn leads to a significant change in plasma properties and therefore can be useful for technological applications. A gas-discharge device which demonstrates control of the plasma properties by this method is described. (c) 2007 American Institute of Physics.
C1 Universal Energy Syst Inc, Dayton, OH 45432 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
St Petersburg Mining Tech Univ, St Petersburg 199026, Russia.
RP Demidov, VI (reprint author), Universal Energy Syst Inc, Dayton-Xenia Rd, Dayton, OH 45432 USA.
EM vladimir.demidov@wpafb.af.mil
RI Demidov, Vladimir/A-4247-2013
OI Demidov, Vladimir/0000-0002-2672-7684
NR 16
TC 7
Z9 7
U1 0
U2 3
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
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD NOV 12
PY 2007
VL 91
IS 20
AR 201503
DI 10.1063/1.2815930
PG 3
WC Physics, Applied
SC Physics
GA 232FK
UT WOS:000251003500021
ER
PT J
AU Tyo, JS
Ratliff, BM
Boger, JK
Black, WT
Bowers, DL
Fetrow, MP
AF Tyo, J. Scott
Ratliff, Bradley M.
Boger, James K.
Black, Wiley T.
Bowers, David L.
Fetrow, Matthew P.
TI The effects of thermal equilibrium and contrast in LWIR polarimetric
images
SO OPTICS EXPRESS
LA English
DT Article
ID EMISSION POLARIZATION; VISION
AB Long-wave infrared (LWIR) polarimetric signatures provide the potential for day-night detection and identification of objects in remotely sensed imagery. The source of optical energy in the LWIR is usually due to thermal emission from the object in question, which makes the signature dependent primarily on the target and not on the external environment. In this paper we explore the impact of thermal equilibrium and the temperature of (unseen) background objects on LWIR polarimetric signatures. We demonstrate that an object can completely lose its polarization signature when it is in thermal equilibrium with its optical background, even if it has thermal contrast with the objects that appear behind it in the image. (c) 2007 Optical Society of America.
C1 Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA.
Appl Technol Assoc, Albuquerque, NM 87123 USA.
USAF, Res Lab, VSSS, Kirtland AFB, NM 87117 USA.
RP Tyo, JS (reprint author), Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA.
EM tyo@ieee.org
NR 19
TC 21
Z9 21
U1 1
U2 5
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD NOV 12
PY 2007
VL 15
IS 23
BP 15161
EP 15167
DI 10.1364/OE.15.015161
PG 7
WC Optics
SC Optics
GA 235HF
UT WOS:000251223600025
PM 19550799
ER
PT J
AU Tang, TY
Averett, KL
Albrecht, JD
Shiao, WY
Chen, YS
Yang, CC
Hsu, CW
Chen, LC
AF Tang, Tsung-Yi
Averett, Kent L.
Albrecht, John D.
Shiao, Wen-Yu
Chen, Yung-Sheng
Yang, C. C.
Hsu, Chih-Wei
Chen, L. C.
TI Coalescence overgrowth of GaN nano-columns with metalorganic chemical
vapor deposition
SO NANOTECHNOLOGY
LA English
DT Article
ID MOLECULAR-BEAM EPITAXY; MOVPE GROWTH; SI(111); LUMINESCENCE;
NANOCOLUMNS; LAYERS
AB The authors demonstrate the coalescence overgrowth of GaN nano-columns on a (111) Si substrate with metalorganic chemical vapor deposition to show high-quality optical properties in the overgrown film. Plan-view scanning electron microscopy (SEM) shows coalesced surface morphology, although hexagonal structures are still visible in the images. The cross-section cathodoluminescence (CL) image shows more efficient emission in the overgrowth layer than from the nano-column layer. The plan-view CL image demonstrates that the emitted light is mainly from the hexagonal structures. The photoluminescence measurement result indicates that the emission efficiency of the overgrown layer is even higher than that of an undoped GaN thin film of high quality. The presence of hexagonal structures correlates to surface roughness values in the range of several nanometres.
C1 Natl Taiwan Univ, Inst Photon & Optoelect, Taipei 10764, Taiwan.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
Natl Taiwan Univ, Inst Photon & Optoelect, Taipei 10764, Taiwan.
Natl Taiwan Univ, Dept Elect Engn, Taipei 10764, Taiwan.
Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10764, Taiwan.
RP Tang, TY (reprint author), Natl Taiwan Univ, Inst Photon & Optoelect, Taipei 10764, Taiwan.
EM ccy@cc.ee.ntu.edu.tw
RI Hsu, Chih-Wei/L-6801-2015; Chen, Li-Chyong/B-1705-2015;
OI Hsu, Chih-Wei/0000-0002-6661-2603; Chen, Li-Chyong/0000-0001-6373-7729;
Yang, Chih-Chung/0000-0002-3476-3802
NR 17
TC 11
Z9 11
U1 1
U2 14
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
EI 1361-6528
J9 NANOTECHNOLOGY
JI Nanotechnology
PD NOV 7
PY 2007
VL 18
IS 44
AR 445601
DI 10.1088/0957-4484/18/44/445601
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 220EA
UT WOS:000250138500012
ER
PT J
AU Morgan, PE
Rizzetta, DP
Visbal, MR
AF Morgan, Philip E.
Rizzetta, Donald P.
Visbal, Miguel R.
TI Large-eddy simulation of separation control for flow over a wall-mounted
hump
SO AIAA JOURNAL
LA English
DT Article; Proceedings Paper
CT AIAA 35th Fluid Dynamics Conference
CY JUN 06-09, 2005
CL Toronto, CANADA
SP Amer Inst Aeronaut & Astronaut
ID HIGH REYNOLDS-NUMBERS; SCHEMES
AB This work describes an implicit large-eddy simulation for active control of flow over a wall-mounted hump. Results are presented for the baseline simulation without flow control and for both steady-suction and oscillatory blowing- and-suction flow control. Results are compared with Reynolds-averaged Navier-Stokes solutions and experimental data from NASA's 2004 Computational Fluid Dynamics Validation on Synthetic Jets and Turbulent Separation Control Workshop. The baseline and steady-suction cases achieved significantly better agreement with experimental flowfield characteristics than the Reynolds-averaged Navier-Stokes simulations in the separated region downstream of the hump. Because the large-eddy simulation was accomplished at one-fifth of the experimental Reynolds number, the oscillatory flow control displayed less effectiveness than the experiment. Using a larger oscillatory amplitude exerts more control on the separation bubble.. Comparing the baseline flow solution with cases using How control clearly demonstrates the ability to reduce the size of the separated flow region in the wake of the hump.
C1 USAF, Res Lab, Ohio Aerosp Inst, Wright Patterson AFB, OH 45433 USA.
USAF, Res Lab, Computat Sci Branch, Wright Patterson AFB, OH 45433 USA.
RP Morgan, PE (reprint author), USAF, Res Lab, Ohio Aerosp Inst, Wright Patterson AFB, OH 45433 USA.
NR 28
TC 9
Z9 10
U1 0
U2 3
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
J9 AIAA J
JI AIAA J.
PD NOV
PY 2007
VL 45
IS 11
BP 2643
EP 2660
DI 10.2514/1.22660
PG 18
WC Engineering, Aerospace
SC Engineering
GA 229AD
UT WOS:000250772800006
ER
PT J
AU Birman, V
Byrd, LW
AF Birman, Victor
Byrd, Larry W.
TI Vibrations of damaged cantilevered beams manufactured from functionally
graded materials
SO AIAA JOURNAL
LA English
DT Article
ID DELAMINATED BEAMS; FINITE-ELEMENT; FABRICATION; ACTUATORS; PANELS
AB This paper is concerned with the effect of damage on free and forced vibrations of a functionally graded cantilever beam. The modes of damage considered in the paper include a region with degraded stiffness adjacent to the root of the beam, a single delamination crack, and a single crack at the root cross section of the beam propagating in the thickness direction. Closed-form solutions are suggested for all cases considered, including both forced and free. vibrations; in the case of free vibrations, these solutions are exact. The peculiarities of the frequency analysis of nonprismatic and/or axially graded beams with the root crack in the presence of static thermal loads are also discussed and it is shown that neglecting axial inertia may lead to a qualitative error (this conclusion remains valid in prismatic functionally graded material beams). Numerical examples concentrate on the effect of a single root crack on the fundamental frequency, because such damage was observed in numerous loading scenarios. It is shown that the presence of a crack that has propagated through about one-third of the thickness of the beam significantly affects the fundamental frequency.
C1 Univ Missouri, Engn Educ Ctr, St Louis, MO 63121 USA.
USAF, Res Lab, Struct Sci Ctr, Analyt Struct Mech Branch, Wright Patterson AFB, OH 45433 USA.
RP Birman, V (reprint author), Univ Missouri, Engn Educ Ctr, 1 Univ Blvd, St Louis, MO 63121 USA.
NR 25
TC 5
Z9 5
U1 3
U2 7
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
J9 AIAA J
JI AIAA J.
PD NOV
PY 2007
VL 45
IS 11
BP 2747
EP 2757
DI 10.2514/1.30076
PG 11
WC Engineering, Aerospace
SC Engineering
GA 229AD
UT WOS:000250772800016
ER
PT J
AU Chatterjee, K
Poggie, J
AF Chatterjee, Kausik
Poggie, Jonathan
TI A parallelized Monte Carlo algorithm for the nonlinear Poisson-Boltzmann
equation in two dimensions
SO APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL
LA English
DT Article
DE Monte Carlo; random walk; stochastic algorithm; nonlinear
Poisson-Boltzmann equation; modeling of plasma sheaths; semiconductor
device modeling; modeling of biomolecular structure and dynamics
ID RANDOM-WALK ALGORITHM; STOCHASTIC ALGORITHM
AB This paper presents the parallelization of a previously-developed two-dimensional floating random walk (FRW) algorithm for the solution of the nonlinear Poisson-Boltzmann (NPB) equation. Historically, the FRW method has not been applied efficiently to the solution of the NPB equation which can be attributed to the absence of analytical expressions for volumetric Green's functions. Stochastic approaches to solving nonlinear equations (in particular the NPB equation) that have been suggested in literature involve an iterative solution of a series of linear problems. As a result, previous applications of the FRW method have examined only the linearized Poisson-Boltzmann equation. In our proposed approach, an approximate (yet accurate) expression for the Green's function for the nonlinear problem is obtained through perturbation theory, which gives rise to an integral formulation that is valid for the entire nonlinear problem. As a result, our algorithm does not have any iteration steps, and thus has a lower computational cost. A unique advantage of the FRW method is that it requires no discretization of either the volume or the surface of the problem domains. Furthermore, each random walk is independent, so that the computational procedure is highly parallelizable. In previously published work, we have presented the fundamentals of our algorithm and in this paper we report the parallelization of this algorithm in two dimensions. The solution of the NPB equation has many interesting applications, including the modeling of plasma discharges, semiconductor device modeling and the modeling of biomolecules.
C1 Dept Elect & Comp Engn, Cooper Union, New York, NY 10003 USA.
Ctr Comp Sci, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Chatterjee, K (reprint author), Dept Elect & Comp Engn, Cooper Union, New York, NY 10003 USA.
NR 21
TC 1
Z9 1
U1 1
U2 2
PU APPLIED COMPUTATIONAL ELECTROMAGNETICS SOC
PI UNIVERSITY
PA UNIV MISSISSIPPI, DEPT ELECTRICAL ENGINEERING, UNIVERSITY, MS 38677 USA
SN 1054-4887
J9 APPL COMPUT ELECTROM
JI Appl. Comput. Electromagn. Soc. J.
PD NOV
PY 2007
VL 22
IS 3
BP 333
EP 339
PG 7
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 237DC
UT WOS:000251352200005
ER
PT J
AU Meyer, TR
Roy, S
Gord, JR
AF Meyer, Terrence R.
Roy, Sukesh
Gord, James R.
TI Improving signal-to-interference ratio in rich hydrocarbon-air flames
using picosecond coherent anti-stokes Raman scattering
SO APPLIED SPECTROSCOPY
LA English
DT Article
DE coherent anti-stokes Raman scattering; CARS; picosecond; ultrafast;
non-resonant background; hydrocarbon-air flames
ID MOLE-FRACTION; SPECTROSCOPY; LASER; CARS; TEMPERATURE
AB There is growing interest in the use of short-pulse lasers for coherent anti-Stokes Raman scattering (CARS) to minimize non-resonant background (NRB) contributions in a variety of applications. Using time-coincident picosecond (ps) pump and Stokes beams and a time-delayed ps probe beam, we show that a three orders of magnitude reduction in NRB interference can be achieved in rich hydrocarbon-air flames while preserving 60% to 80% of the CARS signal. This represents a significant improvement in signal-to-interference ratio compared with previous measurements in room temperature air and is attributable to reduced rates of collisional dephasing and relaxation at flame temperatures. Measurements within the flame zone of a laminar flat-flame burner are used to investigate the characteristics of time-coincident and probe-delayed broadband ps N-2-CARS spectra for C2H4-air equivalence ratios of 0.5 to 1.2. Up to three ro-vibrational bands of N-2 are excited with each laser shot using 135 ps pump and 106 ps Stokes beams, and the CARS signal is generated using a 135 ps probe beam delayed by 165 ps. The enhanced signal-to-interference ratio achieved in the current work is one to two orders of magnitude higher than that previously achieved using polarization-selection techniques without sensitivity to the effects of birefringence caused by density gradients or test cell windows. Moreover, the use of a 135 ps laser source in this study enables frequency domain "broadband" CARS with sufficient resolution to extract ro-vibrational spectral features under various flame conditions. The effect of probe delay and NRB suppression on characteristics of these broadband CARS spectra are investigated, and evidence of preferential collisional dephasing and relaxation of different ro-vibrational transitions is not detected. This is a promising but preliminary result to be investigated further in future work.
C1 Iowa State Univ, Dept Mech Engn, Ames, IA 50011 USA.
Innovat Sci Solut Inc, Dayton, OH 45440 USA.
USAF, Res Lab, Propuls Directorate, Wright Patterson AFB, OH 45433 USA.
RP Meyer, TR (reprint author), Iowa State Univ, Dept Mech Engn, Ames, IA 50011 USA.
EM trm@iastate.edu
RI Meyer, Terrence/F-1556-2011
NR 20
TC 31
Z9 31
U1 0
U2 5
PU SOC APPLIED SPECTROSCOPY
PI FREDERICK
PA 201B BROADWAY ST, FREDERICK, MD 21701 USA
SN 0003-7028
J9 APPL SPECTROSC
JI Appl. Spectrosc.
PD NOV
PY 2007
VL 61
IS 11
BP 1135
EP 1140
DI 10.1366/000370207782596996
PG 6
WC Instruments & Instrumentation; Spectroscopy
SC Instruments & Instrumentation; Spectroscopy
GA 230PH
UT WOS:000250887900002
PM 18028690
ER
PT J
AU Lopez, MA
Arnholt, JL
AF Lopez, Manuel A.
Arnholt, Jonathan L.
TI Safety of definitive in-theater repair of facial fractures
SO ARCHIVES OF FACIAL PLASTIC SURGERY
LA English
DT Article; Proceedings Paper
CT 9th International Symposium of Facial Plastic Surgery
CY MAY 01-04, 2006
CL Las Vegas, NV
ID OPERATION-IRAQI-FREEDOM; INJURIES; WAR; ACINETOBACTER; AFGHANISTAN;
EXPERIENCE; TEAM; TIME
AB Objective: To determine the safety of definitive in-theater facial fracture repair on American military personnel wounded during Operation Iraqi Freedom.
Methods: A retrospective review of all patients with head and neck trauma treated at the 322nd Expeditionary Medical Group/Air Force Theater Hospital, Balad Air Base, Iraq, from May 7, 2005, through September 18, 2005, was performed. This study focused on the outcomes of wounded American military personnel whose facial fractures were definitively repaired in theater. The criteria used to determine candidacy for definitive in-theater facial fracture repair on American military personnel were (1) the fracture site was exposed through either a soft tissue wound or because of an adjacent surgical approach, (2) treatment would not delay evacuation from theater, and (3) treatment would allow the military member to remain in theater.
Results: From May 2005 to September 2005, 207 patients were taken to the operating room and required 388 procedures. A total of 175 patients (85%) were operated on for traumatic injuries, and 52 of these patients required open reduction and internal fixation (ORIF) of a facial fracture. Of the 52 patients who underwent an ORIF, 17 were American military personnel. Of the 17 American patients who were definitively treated for their facial fractures in theater, 16 were contacted and/or followed up on the global military medical database. None of these patients developed an Acinetobacter baumannii infection or had a complication caused by the definitive in-theater ORIF. The range of follow-up was 2 months to 11 months, with a mean of 8.3 months.
Conclusions: Definitive repair of facial fractures with ORIF on American military personnel in theater is advised when the aforementioned criteria are observed. An otolaryngologist is a crucial member of the head and neck trauma team.
C1 Wilford Hall USAF Med Ctr, Dept Otolaryngol, Facial Plast & Reconstruct Surg Serv, San Antonio, TX USA.
RP Lopez, MA (reprint author), 2200 Bergquist Dr, Lackland AFB, TX 78236 USA.
EM manuel.lopez@lackland.af.mil
NR 15
TC 17
Z9 18
U1 0
U2 2
PU AMER MEDICAL ASSOC
PI CHICAGO
PA 515 N STATE ST, CHICAGO, IL 60610-0946 USA
SN 1521-2491
J9 ARCH FACIAL PLAST S
JI Arch. Facial Plast. Surg.
PD NOV-DEC
PY 2007
VL 9
IS 6
BP 400
EP 405
DI 10.1001/archfaci.9.6.400
PG 6
WC Surgery
SC Surgery
GA 231QE
UT WOS:000250963300005
PM 18025350
ER
PT J
AU Chelette, TL
AF Chelette, Tamara L.
TI 3D interpretation of Imaging every pixel a database
SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE
LA English
DT Article
C1 USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Chelette, TL (reprint author), USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 0095-6562
J9 AVIAT SPACE ENVIR MD
JI Aviat. Space Environ. Med.
PD NOV
PY 2007
VL 78
IS 11
BP 1088
EP 1088
PG 1
WC Public, Environmental & Occupational Health; Medicine, General &
Internal; Sport Sciences
SC Public, Environmental & Occupational Health; General & Internal
Medicine; Sport Sciences
GA 228EX
UT WOS:000250711300015
PM 18018446
ER
PT J
AU Grabinski, C
Hussain, S
Lafdi, K
Braydich-Stolle, L
Schlager, J
AF Grabinski, Christin
Hussain, Saber
Lafdi, Khalid
Braydich-Stolle, Laura
Schlager, John
TI Effect of particle dimension on biocompatibility of carbon nanomaterials
SO CARBON
LA English
DT Article
ID HUMAN EPIDERMAL-KERATINOCYTES; IN-VITRO; PULMONARY TOXICITY; OXIDATIVE
STRESS; NANOTUBES; CELLS; CYTOTOXICITY; GROWTH; NANOPARTICLES;
TRANSPORTERS
AB With various emerging applications ranging from medicine to materials and electronics, the risk of exposure to nanomaterials is rapidly increasing. Several routes of exposure to nanomaterials exist; the most important being dermal contact and inhalation. In this dermal toxicity study, the cellular effects of carbon-based materials with diameters ranging from micro- to nano-dimension were investigated using mouse keratinocytes (HEL-30). The carbon materials tested included carbon fibers (CF; 10 mu m, diameter), carbon nanofibers (CNF; 100 nm diameter), multi-walled carbon nanotubes (MWCNT; 10 nm diameter), and single-walled carbon nanotubes (SWCNT; 1 nm diameter). CF and CNF did not significantly affect cell viability; however, MWCNT and SWCNT reduced cell viability in a time-dependent manner up to 48 h, with full recovery of mitochondrial function by the 72 h time point. After a 24 h exposure, cells exposed to MWCNT produced up to 3-fold higher increase in reactive oxygen species than those exposed to SWCNT. The results of this study suggest that high-aspect ratio carbon material toxicity is dependent on dimension and composition. (C) 2007 Elsevier Ltd. All rights reserved.
C1 [Grabinski, Christin; Hussain, Saber; Braydich-Stolle, Laura; Schlager, John] USAF, Res Lab, AFRL HEPB, Wright Patterson AFB, OH 45433 USA.
[Grabinski, Christin; Lafdi, Khalid] Univ Dayton, Dayton, OH 45469 USA.
RP Hussain, S (reprint author), USAF, Res Lab, AFRL HEPB, Wright Patterson AFB, OH 45433 USA.
EM saber.hussain@wpafb.af.mil
NR 45
TC 58
Z9 59
U1 1
U2 21
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0008-6223
J9 CARBON
JI Carbon
PD NOV
PY 2007
VL 45
IS 14
BP 2828
EP 2835
DI 10.1016/j.carbon.2007.08.039
PG 8
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 244MP
UT WOS:000251870300016
ER
PT J
AU Larsow, SP
Bowers, SP
Palekar, NA
Ward, JA
Pulcini, JP
Harrison, SA
AF Larsow, Steven P.
Bowers, Steven P.
Palekar, Nicole A.
Ward, John A.
Pulcini, Joseph P.
Harrison, Stephen A.
TI Histopathologic variability between the right and left lobes of the
liver in morbidly obese patients undergoing roux-en-Y bypass
SO CLINICAL GASTROENTEROLOGY AND HEPATOLOGY
LA English
DT Article
ID SAMPLING VARIABILITY; UNITED-STATES; HEPATITIS-C; DISEASE; BIOPSY;
PREVALENCE; FIBROSIS; IMPACT
AB Background & Aims: Nonalcoholic fatty liver disease (NAFLD) has been shown to occur in > 90% of significantly obese patients. At present, diagnosis of the more severe form of NAFLD, nonalcoholic steatohepatitis (NASH), requires a liver biopsy. Conflicting data exist on the degree of sampling variability seen with percutaneous liver biopsy. Our aim was to assess for significant regional differences in histopathology between the right and left lobes of the liver in morbidly obese patients undergoing bariatric surgery. Methods: Morbidly obese patients undergoing bariatric surgery at Wilford Hall Medical Center were eligible for study enrollment. Patients with chronic liver disease other than NAFLD were excluded. All patients underwent intra-operative liver biopsy, one from the right lobe and one from the left lobe, with a 14-gauge Tru-cut biopsy needle. Histopathologic features of NAFLD were compared by a hepatopathologist who examined biopsy specimens from the 2 hepatic lobes and was blinded to patient identification and site of origin of biopsy. Agreement between the 2 biopsy specimens was assessed by using the kappa coefficient. Results: Forty-three patients (predominantly female) with body mass index median of 46.2 kg/m(2) were enrolled. Agreement for steatosis was 93% (kappa = 0.91), inflammation 74% (kappa = 0.58), ballooning necrosis 84% (kappa = 0.73), fibrosis 98% (kappa=0.96), and for the NAFLD activity score :5 was 93% (kappa = 0.83). Conclusions: Minimal variability was found for steatosis, NAFLD activity score >= 5, and fibrosis in samples of liver obtained from the right and left lobes of the liver in a group of morbidly obese, predominately female patients undergoing bariatric surgery. Histopathologic findings of necroinflammation appear to have the greatest degree of sampling variability. In contrast with previously published data, excellent agreement was seen for fibrosis in biopsy specimens obtained at surgery from right and left lobes of the liver.
C1 Wilford Hall USAF Med Ctr, Div Gastroenterol & Hepatol, San Antonio, TX 78236 USA.
Wilford Hall USAF Med Ctr, Dept Surg, San Antonio, TX 78236 USA.
Wilford Hall USAF Med Ctr, Dept Clin Invest, San Antonio, TX 78236 USA.
Brooke Army Med Ctr, Dept Pathol, Ft Sam Houston, TX 78234 USA.
Brooke Army Med Ctr, Div Gastroenterol & Hepatol, Ft Sam Houston, TX 78234 USA.
RP Harrison, SA (reprint author), Brooke Army Med Ctr, Dept Gastroenterol, 3851 Roger Brooke Dr, Ft Sam Houston, TX 78234 USA.
EM stephen.harrison@amedd.army.mil
NR 10
TC 38
Z9 38
U1 0
U2 2
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1542-3565
J9 CLIN GASTROENTEROL H
JI Clin. Gastroenterol. Hepatol.
PD NOV
PY 2007
VL 5
IS 11
BP 1329
EP 1332
DI 10.1016/j.cgh.2007.06.005
PG 4
WC Gastroenterology & Hepatology
SC Gastroenterology & Hepatology
GA 231KF
UT WOS:000250944900017
PM 17702661
ER
PT J
AU Gorrell, SE
van de Wall, A
Tsung, FL
AF Gorrell, Steven E.
van de Wall, Allan
Tsung, Fu-Lin
TI High-Performance Computing for Defense
SO COMPUTING IN SCIENCE & ENGINEERING
LA English
DT Article
ID STATOR-ROTOR INTERACTIONS; TRANSONIC COMPRESSOR; FLOWS
AB Applying computational science and engineering to the design and analysis of high-performance compressors makes it possible to understand unsteady flow effects in gas turbine engines. Simulations have produced numerical data of greatly improved geometric, physical, and numerical fidelity than previously possible, helping next-generation engines achieve unprecedented performance.
C1 Brigham Young Univ, US Air Force Res Lab, Provo, UT 84602 USA.
Case Western Reserve Univ, Cleveland, OH 44106 USA.
RP Gorrell, SE (reprint author), Brigham Young Univ, US Air Force Res Lab, Provo, UT 84602 USA.
EM sgorrell@byu.edu; allan.vadewall@ge.com; fu-lin.tsung@ge.com
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 1521-9615
J9 COMPUT SCI ENG
JI Comput. Sci. Eng.
PD NOV-DEC
PY 2007
VL 9
IS 6
BP 12
EP 17
DI 10.1109/MCSE.2007.130
PG 6
WC Computer Science, Interdisciplinary Applications
SC Computer Science
GA 221TB
UT WOS:000250249100007
ER
PT J
AU Spinella, PC
Perkins, JG
Grathwohl, KW
Repine, T
Beekley, AC
Sebesta, J
Jenkins, D
Azarow, K
Holcomb, JB
AF Spinella, Philip C.
Perkins, Jeremy G.
Grathwohl, Kurt W.
Repine, Thomas
Beekley, Alec C.
Sebesta, James
Jenkins, Donald
Azarow, Kenneth
Holcomb, John B.
CA 31st Combat Support Hosp Res Worki
TI Risks associated with fresh whole blood and red blood cell transfusions
in a combat support hospital
SO CRITICAL CARE MEDICINE
LA English
DT Article
DE trauma; transfusion; hemorrhage; coagulopathy; war; whole blood
ID MULTIPLE ORGAN FAILURE; CRITICALLY-ILL; MASSIVE TRANSFUSION;
OXYGEN-CONSUMPTION; STORED-BLOOD; STORAGE; SURGERY; SEPSIS; TRAUMA;
RESUSCITATION
AB Objective. Fresh whole blood (FWB) and red blood cells (RBCs) are transfused to injured casualties in combat support hospitals. We evaluated the risks of FWB and RBCs transfused to combat-related casualties.
Design: Retrospective chart review.
Setting. Deployed U.S. Army combat support hospitals.
Subjects. Donors of FWB and recipients of FWB and RBCs.
Measurements and Results: The storage age of RBCs at transfusion was measured as an indicator of overall risk associated with the storage lesion of RBCs between January 2004 and December 2004 at one combat support hospital. Between April 2004 and December 2004, FWB was prescreened only at one combat support hospital for human immunodeficiency virus, hepatitis C virus, and hepatitis B surface antigen before transfusion. To estimate the general incidence of infectious agent contamination in FWB units, samples collected between May 2001 and February 2006 were tested retrospectively for human immunodeficiency virus, hepatitis B surface antigen, hepatitis C virus, and human lymphotropic virus. Results were compared between FWB samples prescreened and not prescreened for infectious agents before transfusion. At one combat support hospital in 2004, 87 patents were transfused 545 units of FWB and 685 patients were transfused 5,294 units of RBCs with mean age at transfusion of 33 days (+/- 6 days). Retrospective testing of 2,831 samples from FWB donor Units transfused in Iraq and Afghanistan between May 2003 and February 2006 indicated that three of 2,831 (0.110/6) were positive for hepatitis C virus recombinant immunoblot assay, two of 2,831 (0.07%) were positive for human lymphotropic virus enzyme immunoassay, and none of 2,831 were positive for both human immunodeficiency virus 1/2 and hepatitis B surface antigen by Western blot and neutralization methods, respectively. The differences in the incidence of hepatitis C virus contamination of FWB donor units between those prescreened for hepatitis C virus (zero of 406; 0%) and not prescreened (three of 2,425; 0.12%) were not significant (p =.48).
Conclusions: The risk of infectious disease transmission with FWB transfusion can be minimized by rapid screening tests before transfusion. Because of the potential adverse outcomes of transfusing RBCs of increased storage age to combat-related trauma patents, the risks and benefits of FWB transfusions must be balanced with those of transfusing old RBCs in patients with life-threatening traumatic injuries.
C1 USA, Inst Surg Res, San Antonio, TX USA.
Walter Reed Army Med Ctr, Washington, DC 20307 USA.
Brooke Army Med Ctr, San Antonio, TX USA.
William Beaumont Army Med Ctr, El Paso, TX 79920 USA.
Madigan Army Med Ctr, Tacoma, WA 98431 USA.
Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
Childrens Med Ctr, Hartford, CT USA.
EM pspinella@ccmckids.org
NR 65
TC 69
Z9 74
U1 0
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0090-3493
J9 CRIT CARE MED
JI Crit. Care Med.
PD NOV
PY 2007
VL 35
IS 11
BP 2576
EP 2581
DI 10.1097/01.CCM.0000285996.65226.A9
PG 6
WC Critical Care Medicine
SC General & Internal Medicine
GA 224CN
UT WOS:000250423500014
PM 17828033
ER
PT J
AU Yun, S
Palazotto, A
AF Yun, S.
Palazotto, A.
TI Damage mechanics incorporating two back stress kinematic hardening
constitutive models
SO ENGINEERING FRACTURE MECHANICS
LA English
DT Article
DE finite deformation; damage; two-back stress; kinematic hardening
ID FINITE DEFORMATION PLASTICITY; 2-COMPONENT MODEL; YIELD SURFACES; SPIN;
LOCALIZATION; FRAMEWORK; BEHAVIOR
AB In the present work, damage mechanics is incorporated into the plastic constitutive relation in order to describe the localized plastic deformation and damage experienced in a tensile test of the high strength VascoMax 300 steel specimen. The results obtained on the VascoMax 300 steel are also compared with 1080 steel. In order to identify the effect of damage on the shear band formation, one-dimensional simple shear analysis is carried out with non-isothermal visco-plasticity using a finite difference modeling assuming isotropic hardening. The results depicts that the damage evolution within a work piece accelerates the plastic deformation localization and the temperature variation plays less significant role in a shear band formation compared with damage mechanics. A coupling between damage mechanics and isothermal rate independent plasticity is proposed using the kinematic hardening constitutive relation which in turn is formulated by combining the nonlinear Armstrong-Frederick rule and the linear Phillips rule. The effects of the various hardening parameters on plastic deformation localization are investigated within the J(2) deformation theory. The material with a lower hardening exponent results in a rapid shear band formation, and the results from the numerical analysis reflected closely with the micro-structures around the fractured regime. However, the material with a higher hardening exponent is less affected by damage evolution in the plastic deformation behavior. Moreover, as the nonlinear strain rate description in the back stress evolution becomes dominant, the plastic strain localization becomes intensified as well as damage. It is also possible to describe a wide range of plastic deformation and damage behavior by selecting a simple combination of two back stress evolution rules. (C) 2007 Elsevier Ltd. All rights reserved.
C1 Agcy Def Dev, Taejon 305600, South Korea.
USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Yun, S (reprint author), Agcy Def Dev, Tech 4-4,POB 35, Taejon 305600, South Korea.
EM sjy4541@Yahoo.com
NR 33
TC 3
Z9 5
U1 2
U2 4
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0013-7944
J9 ENG FRACT MECH
JI Eng. Fract. Mech.
PD NOV
PY 2007
VL 74
IS 17
BP 2844
EP 2863
DI 10.1016/j.engfracmech.2006.12.032
PG 20
WC Mechanics
SC Mechanics
GA 219IJ
UT WOS:000250077800012
ER
PT J
AU Horne, SK
Michaelson, PG
Weitzel, E
AF Horne, Stefanie K.
Michaelson, Peter G.
Weitzel, Erik
TI Bifid epiglottis
SO ENT-EAR NOSE & THROAT JOURNAL
LA English
DT Editorial Material
C1 Wilford Hall USAF Med Ctr, Dept Otolaryngol Head & Neck Surg, Lackland AFB, TX 78236 USA.
RP Horne, SK (reprint author), Wilford Hall USAF Med Ctr, Dept Otolaryngol Head & Neck Surg, Lackland AFB, TX 78236 USA.
OI Weitzel, Erik/0000-0001-9155-3556
NR 3
TC 0
Z9 0
U1 0
U2 0
PU VENDOME GROUP LLC
PI NEW YORK
PA 149 FIFTH AVE, 10TH FLOOR, NEW YORK, NY 10010 USA
SN 0145-5613
J9 ENT-EAR NOSE THROAT
JI ENT-Ear Nose Throat J.
PD NOV
PY 2007
VL 86
IS 11
BP 660
EP 661
PG 2
WC Otorhinolaryngology
SC Otorhinolaryngology
GA 236KT
UT WOS:000251302600012
PM 18225620
ER
PT J
AU Katariya, KO
Bates, GW
Robinson, RD
Arthur, NJ
Propst, AM
AF Katariya, Kathleen O.
Bates, G. Wright
Robinson, Randal D.
Arthur, Nancy J.
Propst, Anthony M.
TI Does the timing of mock embryo transfer affect in vitro fertilization
implantation and pregnancy rates?
SO FERTILITY AND STERILITY
LA English
DT Editorial Material
ID TRANSFER CATHETER; INVITRO FERTILIZATION; IMPROVES; BLOOD
AB The timing of a mock embryo transfer does not affect in vitro fertilization implantation or pregnancy rates. Performing a mock embryo transfer at the time of oocyte retrieval, 3 to 5 days before embryo transfer, does not have a deleterious effect on the endometrium.
C1 Wilford Hall USAF Med Ctr, San Antonio Uniformed Hlth Educ Consortium, Div Reprod Endocrinol & Infertil, Lackland AFB, TX USA.
RP Katariya, KO (reprint author), Wilford Hall USAF Med Ctr, Dept Obstet & Gynecol, 2200 Bergquest Dr,Suite 1-MMNO, Lackland AFB, TX 78236 USA.
EM kkatariya@satx.rr.com
NR 23
TC 6
Z9 6
U1 0
U2 0
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 NOV
PY 2007
VL 88
IS 5
BP 1462
EP 1464
DI 10.1016/j.fertnstert.2006.12.057
PG 3
WC Obstetrics & Gynecology; Reproductive Biology
SC Obstetrics & Gynecology; Reproductive Biology
GA 231XA
UT WOS:000250981300034
PM 17362942
ER
PT J
AU LeardMann, CA
Smith, B
Smith, TC
Wells, TS
Ryan, MAK
AF LeardMann, Cynthia A.
Smith, Besa
Smith, Tyler C.
Wells, Timothy S.
Ryan, Margaret A. K.
CA Millennium Cohort Study Team
TI Smallpox vaccination
SO HUMAN VACCINES
LA English
DT Article
DE smallpox vaccine; questionnaires; military medicine; quality of life;
validation studies
ID MILLENNIUM COHORT; HEALTH SURVEY; PNEUMOCOCCAL VACCINATION; ELDERLY
OUTPATIENTS; ANTHRAX VACCINATION; MILITARY SERVICE; SELF-REPORT;
VALIDATION; INFLUENZA; PROGRAM
AB In December 2002, the US Government implemented policy to immunize health workers, first responders and military personnel against smallpox in preparation for a possible bioterrorist attack. Self-reported vaccination data are commonly used in epidemiologic research and may be used to determine vaccination status in a public health emergency. To establish a measure of reliability, the agreement between self-reported smallpox vaccination and electronic vaccination records was examined using data from the Millennium Cohort Study. Descriptive measures and a kappa statistic were calculated for data from 54,066 Millennium Cohort Study participants. Multivariable modeling adjusting for potential confounders was used to investigate vaccination agreement status and health metrics, as measured by the Short Form 36-Item Health Survey for Veterans ( SF-36V) and hospitalization data. Substantial agreement (kappa = 0.62) was found between self-report and electronic recording of smallpox vaccination. Of all participants with an electronic record of smallpox vaccination, 90% self-reported being vaccinated; and of all participants with no electronic record of vaccination, 82% self-reported not receiving a vaccination. There was no significant difference in hospitalization experience prior to questionnaire completion between vaccinated and unvaccinated participants. While overall scores on the SF-36V suggested a healthy population, participants whose self-reported vaccination status did not match electronic records had slightly lower adjusted mean scores for some scales. These results indicate strong reliability in self-reported smallpox vaccination and also suggest that discordant reporting of smallpox vaccination is not associated with substantial differences in health among Millennium Cohort participants.
C1 [LeardMann, Cynthia A.; Smith, Besa; Smith, Tyler C.; Ryan, Margaret A. K.] Naval Hlth Res Ctr, Dept Def, Ctr Deployment Hlth Res, San Diego, CA 92186 USA.
[Wells, Timothy S.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP LeardMann, CA (reprint author), Naval Hlth Res Ctr, Dept Def, Ctr Deployment Hlth Res, POB 85122, San Diego, CA 92186 USA.
EM cynthia.leard@med.navy.mil
NR 36
TC 42
Z9 42
U1 0
U2 2
PU LANDES BIOSCIENCE
PI AUSTIN
PA 1002 WEST AVENUE, 2ND FLOOR, AUSTIN, TX 78701 USA
SN 1554-8619
J9 HUM VACCINES
JI Hum. Vaccines
PD NOV-DEC
PY 2007
VL 3
IS 6
BP 245
EP 251
PG 7
WC Biotechnology & Applied Microbiology; Immunology
SC Biotechnology & Applied Microbiology; Immunology
GA 269SG
UT WOS:000253669900003
PM 17700077
ER
PT J
AU Maciel, JJ
Slocum, JF
Smith, JK
Turtle, J
AF Maciel, John J.
Slocum, John F.
Smith, John K.
Turtle, John
TI MEMS Electronically Steerable Antennas for fire control radars
SO IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE
LA English
DT Article
AB Large apertures are of great benefit to applications that are prime powered limited as is found on aerostat and other airborne platforms. Electronically scanned array antennas are often proposed for these applications. However, increasing the aperture area with conventional array technology is met with prohibitive cost, weight, and prime power increases because of the dense spacing of phase shifters and/or active T/R modules. This discusses the recent development of RF MEMS (Microelectromechanical System) switch technology and the use of these switches in a Radant(TM) lens configuration for arrays of approximately 10m(2) at X-band. A proof-of-concept 0.4m(2) MEMS Electronically Steerable Antenna (ESA) containing 25,000 MEMS switches has been successfully designed, fabricated, and tested. The 0.4m(2) MEMS ESA was then integrated with an AN/APG-67 radar system to form the MEMS Demonstration Radar System. The MEMS Demonstration Radar System successfully detected both airborne and ground moving targets during a series of extensive radar demonstrations. This is believed to be the first large scale employment of MEMS switches in a scanning antenna and radar system. The low-cost, lightweight, and low power technology demonstrated can enable weight and power constrained platforms with electronic steering.
C1 Radant Technologies & Radant MEMS Inc, Stow, MA 01775 USA.
Lockheed Martin Corp, Syracuse, NY USA.
USAF, Res Lab, Hanscom AFB, MA USA.
RP Maciel, JJ (reprint author), Radant Technologies & Radant MEMS Inc, Stow, MA 01775 USA.
NR 0
TC 12
Z9 13
U1 0
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0885-8985
J9 IEEE AERO EL SYS MAG
JI IEEE Aerosp. Electron. Syst. Mag.
PD NOV
PY 2007
VL 22
IS 11
BP 17
EP 20
DI 10.1109/MAES.2007.4408522
PG 4
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA 234VG
UT WOS:000251191600004
ER
PT J
AU Wei, L
Batalama, SN
Pados, DA
Suter, BW
AF Wei, Lili
Batalama, Stella N.
Pados, Dimitris A.
Suter, Bruce W.
TI Upward scaling of minimum-TSC binary signature sets
SO IEEE COMMUNICATIONS LETTERS
LA English
DT Article
DE binary sequences; code-division multiple-access (CDMA); signal design;
total squared correlation; Welch bound
ID TOTAL-SQUARED-CORRELATION; SYNCHRONOUS CDMA SYSTEMS; KARYSTINOS-PADOS
BOUNDS; DS-CDMA; OPTIMAL SEQUENCES; USER-CAPACITY; SUM CAPACITY;
INTERFERENCE AVOIDANCE; WIRELESS SYSTEMS; MULTIPATH
AB We develop a binary signature design procedure to scale upwards overloaded minimum total-squared-correlation (TSC) binary signature sets. The quality of the design is measured against the recently published binary TSC bounds.
C1 SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA.
USAF, Res Lab, Griffiss AFB, NY 13441 USA.
RP Wei, L (reprint author), SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA.
EM liliwei@eng.buffalo.edu; batalama@eng.buffalo.edu;
pados@eng.buffalo.edu; bruce.suter@rl.af.mil
NR 22
TC 2
Z9 2
U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1089-7798
J9 IEEE COMMUN LETT
JI IEEE Commun. Lett.
PD NOV
PY 2007
VL 11
IS 11
BP 889
EP 891
DI 10.1109/LCOMM.2007.070917
PG 3
WC Telecommunications
SC Telecommunications
GA 231ES
UT WOS:000250929900020
ER
PT J
AU Bruno, JG
Alls, JL
Kiel, JL
AF Bruno, John G.
Alls, John L.
Kiel, Johnathan L.
TI Feasibility of a DNA-based combinatorial array recognition surface
(CARS) in a polyacrylamide gel matrix
SO IEEE SENSORS JOURNAL
LA English
DT Article
DE aptamer; array; deoxyribonucleic acid (DNA); electrophoresis; pattern
recognition; universal sensor
ID DIAZOLUMINOMELANIN DALM; OLIGONUCLEOTIDE ARRAYS; APTAMERS;
ELECTROCHEMILUMINESCENCE; AMPLIFICATION; BIOPOLYMER; BIOSENSOR;
SELECTION; CHIPS
AB We report initial attempts at developing a self-assembled combinatorial DNA biosensor array which may be capable of binding and identifying virtually any soluble analyte that binds the array by pattern recognition, in effect making it a universal biosensor surface. Data are presented for differential binding patterns of various analytes to 1-D arrays of combinatorial deoxyribonucleic acid (DNA) concatamer libraries which are spatially separated according to size and charge by electrophoresis in polyacrylamide gels. These DNA concatamer libraries are essentially composed of single-stranded (ss) random DNA 60 mers, which form a "smear" pattern in gels following electrophoresis. When used to bind and detect various analytes or mixtures of analytes in the gel, we refer to the DNA smear as a "combinatorial array recognition surface" (CARS). Differences in intrinsic fluorescence scanning patterns of CARS gel strips were compared before and after addition of various analytes to the arrays to detect binding patterns. Scans revealed a high level of reproducibility for individual CARS arrays in a given gel with or without bound analytes. Scan patterns between different CARS gel strips were initially less reproducible, but purification of the DNA library using spin columns prior to electrophoresis improved gel-to-gel reproducibility.
C1 Operat Technol Corp, San Antonio, TX 78284 USA.
USAF, Air Force Res Lab, HEPC, Brooks City Base, TX 78235 USA.
RP Bruno, JG (reprint author), Operat Technol Corp, San Antonio, TX 78284 USA.
NR 28
TC 0
Z9 0
U1 1
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1530-437X
J9 IEEE SENS J
JI IEEE Sens. J.
PD NOV-DEC
PY 2007
VL 7
IS 11-12
BP 1609
EP 1616
DI 10.1109/JSEN.2007.908501
PG 8
WC Engineering, Electrical & Electronic; Instruments & Instrumentation;
Physics, Applied
SC Engineering; Instruments & Instrumentation; Physics
GA 236HV
UT WOS:000251294700018
ER
PT J
AU Farr, EG
Bowen, LH
Baum, CE
Prather, WD
AF Farr, Everett G.
Bowen, Leland H.
Baum, Carl E.
Prather, William D.
TI The folded horn antenna
SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
LA English
DT Article
DE antenna gain; antenna radiation patterns; horn antennas; weapons.
AB Antennas for radiating high-power mesoband (medium-bandwidth) electromagnetic signals are critical to the mission of upsetting electronics at a distance. When operated at frequencies of a few hundred megahertz, RF weapons require highly efficient antennas that can fit into a small volume. Most of the existing antennas, such as pyramidal horns, are too large to fit onto certain platforms of interest. To address this challenge, we investigate the folded horn, which has aperture dimensions of 0.5 X 2 wavelengths, and a depth of 1.5-2 wavelengths. This antenna has a nearly focused aperture field, due to a parabolic fold in the H-plane. We report here on the fabrication and testing of the first folded horn, operating at 3 GHz. After a number of iterations, we obtained a realized gain of at least 10 dBi over 3-5 GHz, an aperture efficiency of 80 %, and a return loss below - 10 dB over 2.8-3.35 GHz. This design could be adapted to high voltages, and it could work well in a 2-antenna array, with two antennas positioned back-to-back, driven by a differential source.
C1 Farr Res Inc, Albuquerque, NM 87123 USA.
Univ New Mexico, Albuquerque, NM 87131 USA.
USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RP Farr, EG (reprint author), Farr Res Inc, Albuquerque, NM 87123 USA.
EM efarr@farr-research.com
NR 3
TC 2
Z9 3
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-926X
J9 IEEE T ANTENN PROPAG
JI IEEE Trans. Antennas Propag.
PD NOV
PY 2007
VL 55
IS 11
BP 3341
EP 3344
DI 10.1109/TAP.2007.908854
PN 2
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 231EQ
UT WOS:000250929700027
ER
PT J
AU Sohn, KJ
Li, HB
Himed, B
AF Sohn, Kwang June
Li, Hongbin
Himed, Braham
TI Parametric GLRT for multichannel adaptive signal detection
SO IEEE TRANSACTIONS ON SIGNAL PROCESSING
LA English
DT Article; Proceedings Paper
CT 4th IEEE Sensor Array and Multichannel Signal Processing Workshop
CY JUL 12-14, 2006
CL Waltham, MA
SP IEEE Signal Proc Soc, IEEE Boston Sect, Air Force Res Lab, Def Adv Res Projects Agcy, Air Force Off Sci Res, Off Naval Res
DE generalized likelihood ratio test (GLRT); maximum likelihood (ML)
parameter estimation; multichannel signal detection; parametric models;
space-time adaptive processing (STAP)
ID RADAR
AB This paper considers the problem of detecting a multichannel signal in the presence of spatially and temporally colored disturbance. A parametric generalized likelihood ratio test (GLRT) is developed by modeling the disturbance as a multichannel autoregressive (AR) process. Maximum likelihood (ML) parameter estimation underlying the parametric GLRT is examined. It is shown that the ML estimator for the alternative hypothesis is nonlinear and there exists no closed-form expression. To address this issue, an asymptotic ML (AML) estimator is presented, which yields asymptotically optimum parameter estimates at reduced complexity. The performance of the parametric GLRT is studied by considering challenging cases with limited or no training signals for parameter estimation. Such cases (especially when training is unavailable) are of great interest in detecting signals in heterogeneous, fast changing, or dense-target environments, but generally cannot be handled by most existing multichannel detectors which rely more heavily on training at an adequate level. Compared with the recently introduced parametric adaptive matched filter (PAMF) and parametric Rao detectors, the parametric GLRT achieves higher data efficiency, offering improved detection performance in general.
C1 Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA.
USAF, Res Lab, SNRT, Rome, NY 13441 USA.
RP Sohn, KJ (reprint author), Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA.
EM ksohn@stevens.edu; hli@stevens.edu; braham.himed@signal-labs.com
NR 25
TC 37
Z9 37
U1 1
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1053-587X
J9 IEEE T SIGNAL PROCES
JI IEEE Trans. Signal Process.
PD NOV
PY 2007
VL 55
IS 11
BP 5351
EP 5360
DI 10.1109/TSP.2007.896068
PG 10
WC Engineering, Electrical & Electronic
SC Engineering
GA 223MH
UT WOS:000250374300019
ER
PT J
AU Wang, X
Pan, E
Roy, AK
AF Wang, X.
Pan, E.
Roy, A. K.
TI Three-dimensional Green's functions for a steady point heat source in a
functionally graded half-space and some related problems
SO INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
LA English
DT Article
DE Green's function; heat conduction; functionally graded material;
electric field gradient effects; strain gradient effect; half-space;
Helmholtz equation
ID GRADIENT ELASTICITY
AB Three-dimensional Green's functions are derived for a steady point heat source in a functionally graded half-space where the thermal conductivity varies exponentially along an arbitrary direction. We first introduce an auxiliary function which satisfies an inhomogeneous Helmholtz equation. Then by virtue of the image method which was first proposed by Sommerfeld for the homogeneous half-space Green's function of a steady point heat source, we arrive at an explicit expression for this function. Finally with this auxiliary function, we derive the three-dimensional Green's functions due to a steady point heat source in a functionally graded half-space. Also investigated in. this paper. are the temperature field induced by a point heat source moving at a constant speed in a functionally graded full-space; the electric potential due to a static point electric charge in a dielectric full-space with electric field gradient effects; and the two-dimensional time-harmonic dynamic Green's function for homogeneous and functionally graded materials with strain gradient effects. (C) 2007 Elsevier Ltd. All rights reserved.
C1 Univ Akron, Dept Civil Engn, Akron, OH 44325 USA.
Univ Akron, Dept Appl Math, Akron, OH 44325 USA.
USAF, Res Lab, AFRL, MLBCM, Wright Patterson AFB, OH 45433 USA.
RP Pan, E (reprint author), Univ Akron, Dept Civil Engn, Akron, OH 44325 USA.
EM pan2@uakron.edu
RI Pan, Ernian/F-4504-2011
OI Pan, Ernian/0000-0001-6640-7805
NR 16
TC 11
Z9 13
U1 1
U2 4
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0020-7225
J9 INT J ENG SCI
JI Int. J. Eng. Sci.
PD NOV
PY 2007
VL 45
IS 11
BP 939
EP 950
DI 10.1016/j.ijengsci.2007.07.003
PG 12
WC Engineering, Multidisciplinary
SC Engineering
GA 226LP
UT WOS:000250590900005
ER
PT J
AU Bryan, CJ
AF Bryan, Craig J.
TI Re: Neuropsychology of BPI and BPII
SO JOURNAL OF AFFECTIVE DISORDERS
LA English
DT Letter
C1 Wilford Hall USAF Med Ctr, San Antonio, TX USA.
RP Bryan, CJ (reprint author), Wilford Hall USAF Med Ctr, San Antonio, TX USA.
EM craig.btyan@lackland.af.mil
OI Bryan, Craig/0000-0002-9714-0733
NR 4
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0165-0327
J9 J AFFECT DISORDERS
JI J. Affect. Disord.
PD NOV
PY 2007
VL 103
IS 1-3
BP 283
EP 283
DI 10.1016/j.jad.2007.02.002
PG 1
WC Clinical Neurology; Psychiatry
SC Neurosciences & Neurology; Psychiatry
GA 223UC
UT WOS:000250396800037
PM 17360042
ER
PT J
AU Parga, JR
Reeder, MF
Leveron, T
Blackburn, K
AF Parga, Jose Rivera
Reeder, Mark F.
Leveron, Troy
Blackburn, Ken
TI Experimental study of a micro air vehicle with a rotatable tail
SO JOURNAL OF AIRCRAFT
LA English
DT Article; Proceedings Paper
CT AIAA 17th Computational Fluid Dynamics Conference
CY JUN 06-09, 2005
CL Toronto, CANADA
SP Amer Inst Aeronaut & Astronaut
AB An experimental study of a rotatable tail mechanism applied to a small unmanned aerial vehicle was performed using a six-component wind-tunnel balance in the U.S. Air Force Institute of Technology low-speed wind tunnel. Attributes of the control and stability characteristics of the original vehicle, which were documented in an earlier study, are compared with those of a unique control methodology, a tail consisting of a single surface, with controllable elevation and rotation. An advantage of this change is a reduction in the storage length of the vehicle. Because there are similarities in the rotatable tail mechanism and the tail of many birds, the rotatable tail reflects a biomimetric feature. Measured force and moment coefficient measurements for the actual vehicle at-a typical flight speed. indicated that a rotatable tail provides a sufficient yaw moment for turning. For example, yaw moment coefficients C-n, ranging from -0.02 to +0.02, which is typical for a rudder, were achievable as long as the absolute value of the tail elevation angle was large. The dependence of the yaw moment coefficient on the elevator angle and angle of attack, in addition to the tail rotation angle, indicates that there would be significant challenges in applying a robust flight control scheme with the current actuator configuration. An additional feature of the tail design is that by deflecting the tail upward, it could also function effectively as an air brake. A more than twofold increase in drag coefficient for constant angle of attack was measured when the tail elevation angle was increased to nearly 70 deg.
C1 [Parga, Jose Rivera; Reeder, Mark F.; Leveron, Troy] USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
[Blackburn, Ken] USAF, Res Lab, Munit Directorate, Flight Vehicles Integrat Branch, Eglin AFB, FL 32542 USA.
RP Parga, JR (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
NR 15
TC 1
Z9 1
U1 1
U2 6
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
J9 J AIRCRAFT
JI J. Aircr.
PD NOV-DEC
PY 2007
VL 44
IS 6
BP 1761
EP 1768
DI 10.2514/1.24192
PG 8
WC Engineering, Aerospace
SC Engineering
GA 242DE
UT WOS:000251703900001
ER
PT J
AU Morton, SA
Cummings, RM
Kholodar, DB
AF Morton, Scott A.
Cummings, Russell M.
Kholodar, Denis B.
TI High resolution turbulence treatment of F/A-18 tail buffet
SO JOURNAL OF AIRCRAFT
LA English
DT Article; Proceedings Paper
CT AIAA/ASME/ASCE/AHS/ASC 45th Structures, Structural Dynamics and
Materials Conference
CY APR 19-22, 2004
CL Palm Springs, CA
SP Amer Inst Aeronaut & Astronaut, ASME, ASCE, AHS, ASC
ID DETACHED-EDDY SIMULATION; AIRCRAFT
AB Unsteady tail loads of the F/A-18 are computed using various turbulence models at an angle of attack consistent with buffet induced by leading-edge extension vortex breakdown. Comparison of these industry-standard Reynolds-averaged Navier-Stokes turbulence models with the detached-eddy simulation hybrid approach reveals the inadequacies of Reynolds-averaged Navier-Stokes methods and the ability of detached-eddy simulation to reproduce the observed unsteadiness at these conditions. Computed vortex breakdown position and frequencies of the detached-eddy simulation method are shown to be accurate by comparison to flight-test and experimental results. Finally, comparison of the detached-eddy simulation unsteady tail pressures with flight-test tail pressures reveal the ability of the method to accurately reproduce F/A-18 tail buffet loads and its readiness for inclusion in a fluid-structure interaction method.
C1 [Morton, Scott A.; Cummings, Russell M.; Kholodar, Denis B.] USAF Acad, Colorado Springs, CO 80840 USA.
RP Morton, SA (reprint author), USAF, Seek Eagle Off, Colorado Springs, CO 80840 USA.
NR 27
TC 5
Z9 6
U1 0
U2 4
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
J9 J AIRCRAFT
JI J. Aircr.
PD NOV-DEC
PY 2007
VL 44
IS 6
BP 1769
EP 1775
DI 10.2514/1.29577
PG 7
WC Engineering, Aerospace
SC Engineering
GA 242DE
UT WOS:000251703900002
ER
PT J
AU Pokines, JT
Peterhans, JCK
AF Pokines, James T.
Peterhans, Julian C. Kerbis
TI Spotted hyena (Crocuta crocuta) den use and taphonomy in the Masai Mara
National Reserve, Kenya
SO JOURNAL OF ARCHAEOLOGICAL SCIENCE
LA English
DT Article
DE spotted hyena; crocuta crocuta; taphonomy; bone accumulation; denning
behavior; Masai mara; Kenya
ID HYAENA-BRUNNEA; STRIPED HYENA; NAMIB DESERT; BEHAVIOR; HOMINID; ECOLOGY;
CAVE; ASSEMBLAGES; PATTERNS; AFRICA
AB Hyena taphonomy is of great importance to studies of hominid evolution, since these carnivore taxa have the highest potential both to produce large osseous assemblages and to modify existing hominid-accumulated assemblages throughout the Old World. The three extant hyena species (brown: Parahyaena brunnea; striped: Hyaena hyaena; and spotted: Crocuta crocuta) are all significant bone collectors and modifiers. Spotted hyenas generally have the lowest potential to accumulate osseous remains, and the rate of accumulation varies based upon the type of den. The present research examines the remains accumulated by spotted hyenas in Masai Mara Cave, Masai Mara National Reserve, Kenya. The contents of this den were collected twice by the authors, with an 11 -year span interceding. The taphonomic signatures of spotted hyena interaction with bone are presented, including species and skeletal element representation, breakage patterns, tooth marks, tooth puncture, edge polish, and gastric corrosion. Other taphonomic factors examined include rodent gnawing and weathering stage. The cave den assemblage was accumulated at a rate of 30.4 identified specimens and a minimum of 4.1 prey individuals per year. In addition, the osseous remains accumulated by spotted hyenas at multiple burrow dens within the Reserve were examined for taxonomic representation and multiple taphonomic parameters. Rates of accumulation at this type of den tend to be very low, due to differential usage by spotted hyenas and the more ephemeral nature of earthen dens. (c) 2007 Published by Elsevier Ltd.
C1 Cent Identificat Lab, Joint POW MIA Accounting Command, Hickam AFB, HI 96853 USA.
Roosevelt Univ, Univ Coll, Chicago, IL 60605 USA.
Field Museum Nat Hist, Div Mammals, Chicago, IL 60605 USA.
RP Pokines, JT (reprint author), Cent Identificat Lab, Joint POW MIA Accounting Command, 310 Worchester Ave, Hickam AFB, HI 96853 USA.
EM jamespokines@hotmail.com
OI Pokines, James/0000-0002-0406-420X
NR 66
TC 43
Z9 53
U1 0
U2 10
PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0305-4403
J9 J ARCHAEOL SCI
JI J. Archaeol. Sci.
PD NOV
PY 2007
VL 34
IS 11
BP 1914
EP 1931
DI 10.1016/j.jas.2007.01.012
PG 18
WC Anthropology; Archaeology; Geosciences, Multidisciplinary
SC Anthropology; Archaeology; Geology
GA 221XH
UT WOS:000250260200017
ER
PT J
AU Westmoreland, D
Kiltie, RA
AF Westmoreland, David
Kiltie, Richard A.
TI Egg coloration and selection for crypsis in open-nesting blackbirds
SO JOURNAL OF AVIAN BIOLOGY
LA English
DT Article
ID DEFENSE; REFLECTANCE; ADAPTATION; PREDATION; INCREASE; SUCCESS; BIRDS
AB High variation in egg coloration among birds has traditionally been explained as adaptation for camouflage. We tested this hypothesis by conducting reciprocal clutch exchanges (n=301) among Brewer's blackbirds Euphagous cyanocephalus, red-winged blackbirds Agelaius phoeniceus, and yellow-headed blackbirds Xanthocephalus xanthocephalus. We predicted that clutches placed against their natural nest backgrounds would have higher survival rates than heterospecific clutches. Intraspecific clutch exchanges were used as a control. Clutch survival was monitored for a 9-d period at all nests, during which time incubation rhythm and nest defense were quantified. Intraspecific clutch exchanges did not influence incubation or nest defense. For two of the species, intraspecific clutch exchanges did not influence clutch survival; in red-winged blackbirds, however, intraspecifically exchanged clutches had somewhat depressed survival curves relative to control clutches (P=0.08). The effect of interspecific clutch exchanges differed by host species. In Brewer's nests, eggs of the yellow-headed blackbird had lower survival than Brewer's eggs (P=0.02), but survival of red-winged blackbird eggs did not differ from Brewer's eggs (P=0.50). In nests of red-winged blackbirds, all three clutch types had approximately equal survival. In yellow-headed blackbird nests, eggs of the red-winged blackbird had lower survival than yellow-headed blackbird eggs (P=0.06), and survival of Brewer's eggs did not differ from yellow-headed blackbird eggs (P=0.31). These findings support a role for egg coloration as camouflage in two of the three species studied.
C1 USAF Acad, Dept Biol, Colorado Springs, CO 80840 USA.
FWC FWRI Wildlife Res Lab, Gainesville, FL 32601 USA.
RP Westmoreland, D (reprint author), USAF Acad, Dept Biol, Colorado Springs, CO 80840 USA.
EM david.westmoreland@usafa.edu; richard.kiltie@myfwc.com
NR 31
TC 11
Z9 12
U1 2
U2 8
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0908-8857
J9 J AVIAN BIOL
JI J. Avian Biol.
PD NOV
PY 2007
VL 38
IS 6
BP 682
EP 689
DI 10.1111/j.2007.0908-8857.04066.x
PG 8
WC Ornithology
SC Zoology
GA 230ZY
UT WOS:000250916700006
ER
PT J
AU Commander, C
Pardalos, PM
Ryabchenko, V
Uryasev, S
Zrazhevsky, G
AF Commander, ClaytonW.
Pardalos, Panos M.
Ryabchenko, Valeriy
Uryasev, Stan
Zrazhevsky, Grigoriy
TI The wireless network jamming problem
SO JOURNAL OF COMBINATORIAL OPTIMIZATION
LA English
DT Article
DE network interdiction; integer programming; jamming; NP-hard; percentile
constraints
AB In adversarial environments, disabling the communication capabilities of the enemy is a high priority. We introduce the problem of determining the optimal number and locations for a set of jamming devices in order to neutralize a wireless communication network. This problem is known as the WIRELESS NETWORK JAMMING PROBLEM. We develop several mathematical programming formulations based on covering the communication nodes and limiting the connectivity index of the nodes. Two case studies are presented comparing the formulations with the addition of various percentile constraints. Finally, directions of further research are addressed.
C1 USAF, Res Lab, Munit Directorate, Gainesville, FL USA.
Univ Florida, Dept Ind & Syst Engn, Ctr Appl Optimizat, Gainesville, FL 32611 USA.
Univ Florida, Dept Ind & Syst Engn, Risk Management & Financial Engn Lab, Gainesville, FL 32611 USA.
RP Commander, C (reprint author), USAF, Res Lab, Munit Directorate, Gainesville, FL USA.
EM clayton.commander@eglin.af.mil; pardalos@ufl.edu; valeriy@ufl.edu;
uryasev@ufl.edu
RI Pardalos, Panos/D-3645-2009; URYASEV, Stan/O-5231-2014;
OI URYASEV, Stan/0000-0001-6950-3966; Commander,
Clayton/0000-0001-8477-932X
NR 12
TC 19
Z9 23
U1 0
U2 1
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1382-6905
J9 J COMB OPTIM
JI J. Comb. Optim.
PD NOV
PY 2007
VL 14
IS 4
BP 481
EP 498
DI 10.1007/s10878-007-9071-7
PG 18
WC Computer Science, Interdisciplinary Applications; Mathematics, Applied
SC Computer Science; Mathematics
GA 215EV
UT WOS:000249792000008
ER
PT J
AU Irwin, JA
Leney, MD
Loreille, O
Barritt, SM
Christensen, AF
Holland, TD
Smith, BC
Parsons, TJ
AF Irwin, Jodi A.
Leney, Mark D.
Loreille, Odile
Barritt, Suzanne M.
Christensen, Alexander F.
Holland, Thomas D.
Smith, Brion C.
Parsons, Thomas J.
TI Application of low copy number STR typing to the identification of aged,
degraded skeletal remains
SO JOURNAL OF FORENSIC SCIENCES
LA English
DT Article
DE forensic sciences; DNA typing; low copy number; Y chromosome;
mitochondrial DNA; short tandem repeat; degraded skeletal remains
ID ANCIENT DNA; SEQUENCE-ANALYSIS; SAMPLES; GENOME
AB Low copy number (LCN) STR typing was successfully applied to four interesting cases during developmental validation of the approach for degraded skeletal remains. Specific questions were addressed in each case, with the acquisition of STR data largely serving as additional confirmatory or investigatory information in any specific situation, and not necessarily providing the definitive evidence to establish identity. The cases involve missing U. S. service members from World War I, World War II, and the Vietnam War. The variety of these cases, in terms of the questions addressed, the age of the remains, and the type of reference material available for comparison, demonstrates the broad utility of LCN STR typing in the identification of degraded skeletal remains from missing persons.
C1 [Irwin, Jodi A.; Loreille, Odile; Barritt, Suzanne M.; Smith, Brion C.; Parsons, Thomas J.] Armed Forces Inst Pathol, Armed Forces DNA Identificat Lab, AFIP Annex, Rockville, MD 20850 USA.
[Leney, Mark D.; Christensen, Alexander F.; Holland, Thomas D.] Cent Identificat Lab, Joint POW MIA Accounting Command, Hickam AFB, HI 96853 USA.
RP Irwin, JA (reprint author), Armed Forces Inst Pathol, Armed Forces DNA Identificat Lab, AFIP Annex, 1413 Res Blvd,Bldg 101, Rockville, MD 20850 USA.
EM jodi.irwin@afip.osd.mil
OI Christensen, Alexander/0000-0002-5601-7982
NR 21
TC 23
Z9 23
U1 0
U2 6
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0022-1198
J9 J FORENSIC SCI
JI J. Forensic Sci.
PD NOV
PY 2007
VL 52
IS 6
BP 1322
EP 1327
DI 10.1111/j.1556-4029.2007.00561.x
PG 6
WC Medicine, Legal
SC Legal Medicine
GA 239YH
UT WOS:000251553700013
PM 17944905
ER
PT J
AU Shaffer, PJ
Ross, IM
Oppenheimer, MW
Doman, DB
Bollino, KP
AF Shaffer, Patrick J.
Ross, I. Michael
Oppenheimer, Michael W.
Doman, David B.
Bollino, Kevin P.
TI Fault-tolerant optimal trajectory generation for reusable launch
vehicles
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID CONTROL ALLOCATION; ADAPTIVE GUIDANCE; REENTRY VEHICLES; OPTIMIZATION;
CONSTRAINTS
AB Reconfigurable inner-loop control laws improve the fault tolerance of a vehicle to control effector failures. The control effectors can produce significant perturbations to the nominal forces and can also affect the flight conditions over which the vehicle can be controlled. Three-degree-of-freedom dynamical models typically include wing-body aerodynamic force effects but ignore the aerodynamic forces produced by the control surfaces. These trim effects are a component of 6-degree-of-freedom models; however, such models are cumbersome for the purposes of trajectory optimization. In this work, a method for including the trim effects as well as control-induced trajectory constraints in a 3-degree-of-freedom model is presented. The method uses nonlinear control allocation to determine the control effector positions, required to rotationally balance the vehicle, and uses that information to compute force perturbations and new control-induced trajectory constraints. The contributions of the control effectors to the vehicle lift and drag are computed, as well as constraints that define regions of the flight envelope where the vehicle cannot be rotationally balanced. An example is presented that includes control failure effects in a maximum downrange trajectory optimization problem. Constrained trajectories are planned by solving an optimal control problem using a Legendre pseudospectral method and state-dependent constraints, resulting from a control failure, are included. Results show that these methods hold the potential to enhance safety margins even when control effectors have failed.
C1 USN, Postgrad Sch, Monterey, CA 93943 USA.
USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
USAF, Control Design & Anal Branch, Wright Patterson AFB, OH 45433 USA.
RP Shaffer, PJ (reprint author), USN, Postgrad Sch, Monterey, CA 93943 USA.
EM imross@nps.edu; Michael.Oppenheimer@wpafb.af.mil;
David.Doman@wpafb.af.mil; kpbollin@nps.edu
NR 32
TC 8
Z9 9
U1 1
U2 11
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD NOV-DEC
PY 2007
VL 30
IS 6
BP 1794
EP 1802
DI 10.2514/1.27699
PG 9
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 230OJ
UT WOS:000250885500022
ER
PT J
AU Atkins, BZ
Trachtenberg, MS
Prince-Petersen, R
Vess, G
Bush, EL
Balsara, KR
Lin, SS
Davis, RD
AF Atkins, B. Zane
Trachtenberg, Melissa S.
Prince-Petersen, Rebecca
Vess, Gina
Bush, Errol L.
Balsara, Keki R.
Lin, Shu S.
Davis, R. Duane, Jr.
TI Assessing oropharyngeal dysphagia after lung transplantation: Altered
swallowing mechanisms and increased morbidity
SO JOURNAL OF HEART AND LUNG TRANSPLANTATION
LA English
DT Article
ID GASTROESOPHAGEAL-REFLUX DISEASE; LARYNGOPHARYNGEAL SENSORY DEFICITS;
FIBEROPTIC ENDOSCOPIC EVALUATION; VOCAL FOLD MEDIALIZATION;
BRONCHIOLITIS OBLITERANS; ALLOGRAFT DYSFUNCTION; ASPIRATION; PREVALENCE;
PARALYSIS; PATHOPHYSIOLOGY
AB Background: Gastroesophageal reflux is associated with lung transplantation (LT) and bronchiolitis obliterans syndrome, limiting allograft functional longevity. LT patients may also develop post-operative oropharyngeal dysphagia, exposing the allograft to further risk. However, the magnitude of this problem is unknown. We examined LT recipients Post-operatively for swallowing disorders and correlated findings with pre- and post-operative variables.
Methods: Two hundred sixty-three LT patients (January 2001 to July 2005) at a single center were retrospectively reviewed. Each underwent clinical swallowing assessment. Provocative swallowing evaluation (SE) was performed in 149 patients (Group 1); 114 patients did not receive formal SE (Group 2). SE studies were considered positive with laryngeal penetration (PEN) or tracheal aspiration (ASP) of thin liquids. Groups were compared with respect to pre-, peri- and post-operative variables using analysis of variance (ANOVA) and chi-square tests.
Results: After LT, 56.7% of patients underwent post-operative SE (mean 19 +/- - 20 days), most of whom (87.9%) had fiber-optic endoscopic studies. SE was positive for PEN or ASP in 70.5% (n = 105). Aspiration occurred in 63.8% (n = 67) of positive SEs; 77..6% (n = 52) of ASP assessments were clinically silent. Pre-operative gastroesophageal reflux disease (GERD) and post-operative complications, including vocal cord paresis, pleural processes, venous thromboses and severe rejection episodes, were more common among Group 1. Group 2 had a significantly reduced hospital length of stay (p = 0.004).
Conclusions: Prospective SE identified strikingly high rates of dysphagia after LT. Because many of these deficits are silent, aggressive pulmonary toilet is especially important after post-operative LT. Pre-operative SE may clarify those at increased risk for new-onset oropharyngeal dysphagia after LT. J Heart Lung Transplant 2007;26:1144-8. Copyright (c) 2007 by the International Society for Heart and Lung Transplantation.
C1 Duke Univ, Sch Med, Dept Surg, Durham, NC 27706 USA.
RP Atkins, BZ (reprint author), 301 Fisher St Keesler AFB, Ocean Springs, MS 39564 USA.
EM broadus.atkins@keester.af.mil
NR 29
TC 12
Z9 12
U1 1
U2 2
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1053-2498
J9 J HEART LUNG TRANSPL
JI J. Heart Lung Transplant.
PD NOV
PY 2007
VL 26
IS 11
BP 1144
EP 1148
DI 10.1016/j.healun.2007.07.038
PG 5
WC Cardiac & Cardiovascular Systems; Respiratory System; Surgery;
Transplantation
SC Cardiovascular System & Cardiology; Respiratory System; Surgery;
Transplantation
GA 237VJ
UT WOS:000251404200010
PM 18022080
ER
PT J
AU Chen, JK
Ching, HK
Allahdadi, FA
AF Chen, J. K.
Ching, Hsu-Kuang
Allahdadi, Firooz A.
TI Shock-induced detonation of high explosives by high velocity impact
SO JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES
LA English
DT Article
DE explosive detonation; high velocity impact; Lee-Tarver ignition and
growth model; Jones-Wilkins-Lee equation of state; Johnson-Cook model;
finite element analysis
ID PROJECTILE; INITIATION; CONTAINER; WAVES
AB We investigate shock-induced detonation of high explosives confined in an open-ended steel cylinder by a normal impact to the cylindrical surface using three-dimensional finite element analysis. Three types of steel projectiles are considered: a cube, a sphere and a square plate. For the encased LX-17 explosive the calculated threshold impact velocities that lead to deflagration and detonation are higher for a sphere than for a cube of the same mass. It is found that detonation of the encased PBXN-110 explosive with the cubical projectile could occur immediately once a full reaction is initiated in the region near the impact site. The threshold detonation velocity is much lower for PBXN-110 than for LX-17. In addition, we discuss the threshold conditions of detonation predicted by different equations of state and failure models for the steel casing and projectile.
C1 [Chen, J. K.; Ching, Hsu-Kuang] Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA.
[Allahdadi, Firooz A.] USAF, Safety Ctr, Kirtland AFB, NM USA.
RP Chen, JK (reprint author), Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA.
EM ChenJnK@missouri.edu; hching@vt.edu; Firooz.Allahdadi@kirtland.af.mil
NR 24
TC 2
Z9 5
U1 0
U2 12
PU MATHEMATICAL SCIENCE PUBL
PI BERKELEY
PA UNIV CALIFORNIA, DEPT MATHEMATICS, BERKELEY, CA 94720-3840 USA
SN 1559-3959
J9 J MECH MATER STRUCT
JI J. Mech. Mater. Struct.
PD NOV
PY 2007
VL 2
IS 9
BP 1701
EP 1721
DI 10.2140/jomms.2007.2.1701
PG 21
WC Materials Science, Multidisciplinary; Mechanics
SC Materials Science; Mechanics
GA 308RE
UT WOS:000256406900003
ER
PT J
AU McAdams, RM
Milhoan, KA
AF McAdams, R. M.
Milhoan, K. A.
TI Diagnosis of patent ductus arteriosus by a neonatologist
SO JOURNAL OF PERINATOLOGY
LA English
DT Letter
C1 US Naval Hosp Okinawa, Dept Neonatol, Okinawa, Japan.
18 Med Grp, Okinawa, Japan.
Wilford Hall USAF Med Ctr, Div Cardiol, Dept Pediat, San Antonio, TX 78236 USA.
RP McAdams, RM (reprint author), US Naval Hosp Okinawa, Dept Neonatol, Okinawa, Japan.
EM ryan.mcadams@.med.navy.mil
NR 2
TC 0
Z9 0
U1 0
U2 0
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK STREET, 9TH FLOOR, NEW YORK, NY 10013-1917 USA
SN 0743-8346
J9 J PERINATOL
JI J. Perinatol.
PD NOV
PY 2007
VL 27
IS 11
BP 734
EP 735
DI 10.1038/sj.jp.7211813
PG 2
WC Obstetrics & Gynecology; Pediatrics
SC Obstetrics & Gynecology; Pediatrics
GA 224JY
UT WOS:000250444500014
PM 17960148
ER
PT J
AU Kobayashi, K
Bowersox, RDW
Srinivasan, R
Carter, CD
Hsu, KY
AF Kobayashi, Kan
Bowersox, Rodney D. W.
Srinivasan, Ravichandra
Carter, Campbell D.
Hsu, Kuan-Yu
TI Flowfield studies of a diamond-shaped fuel injector in a supersonic flow
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article; Proceedings Paper
CT AIAA/ASME/SAE/ASEE 43rd Joint Propulsion Conference
CY JUL 08-11, 2007
CL Cincinnati, OH
SP Amer Inst Aeronaut & Astronaut, ASME, SAE, ASEE
ID SONIC INJECTION; CROSS-FLOW; ORIFICES
AB Studies were performed to characterize the flow structure and the mixing characteristics of a diamond-port flush-wall fuel injector at Mach 2.0 airflow. The goals were to examine the flow structure in the near-field region of the diamond- and circular-port injectors and to quantify the effects of igniter torch flow on the near-field How structure with and without torch gas. Planar laser-induced fluorescence was used to document the flow trajectories and the injector-barrel shock shape for the injectors. For the inert mixing studies, the flow was seeded with a nitric-oxide-trace probe molecule, whereas for the reacting experiments, naturally occurring hydroxyl was used. The present experiments confirmed recent computation results that implied that under certain conditions, a diamond-shaped injector port could be tailored to improve mixing and produce an additional secondary flow structure with gasdynamic flame-holding potential. It was also shown that an igniter torch system could be incorporated without adversely affecting the tailored flow structure.
C1 Japan Aerosp Explorat Agcy, Combined Propuls Res Grp, Combust & Control Sect, Kakuda, Miyagi 9811525, Japan.
Texas A&M Univ, College Stn, TX 77843 USA.
USAF, Res Lab, Aerosp Propuls Div, Wright Patterson AFB, OH 45433 USA.
Innovat Sci Soult Inc, Dayton, OH 45440 USA.
RP Kobayashi, K (reprint author), Japan Aerosp Explorat Agcy, Combined Propuls Res Grp, Combust & Control Sect, Kakuda, Miyagi 9811525, Japan.
NR 18
TC 12
Z9 12
U1 0
U2 3
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
J9 J PROPUL POWER
JI J. Propul. Power
PD NOV-DEC
PY 2007
VL 23
IS 6
BP 1168
EP 1176
DI 10.2514/1.30000
PG 9
WC Engineering, Aerospace
SC Engineering
GA 231HD
UT WOS:000250936400003
ER
PT J
AU Heiser, WH
Pratt, DT
Mattingly, JD
AF Heiser, W. H.
Pratt, D. T.
Mattingly, J. D.
TI Comment on "Single-cycle unsteady nozzle phenomena in pulse detonation
engines"
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Editorial Material
C1 USAF Acad, Colorado Springs, CO 80840 USA.
Univ Washington, Seattle, WA 98105 USA.
Mattingly Consulting, Bothell, WA 98011 USA.
RP Heiser, WH (reprint author), USAF Acad, Colorado Springs, CO 80840 USA.
NR 3
TC 0
Z9 0
U1 1
U2 2
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
J9 J PROPUL POWER
JI J. Propul. Power
PD NOV-DEC
PY 2007
VL 23
IS 6
BP 1327
EP 1328
DI 10.2514/1.33867
PG 2
WC Engineering, Aerospace
SC Engineering
GA 231HD
UT WOS:000250936400021
ER
PT J
AU Forbes, JM
Bruinsma, S
Lemoine, FG
Bowman, BR
Konopliv, A
AF Forbes, Jeffrey M.
Bruinsma, Sean
Lemoine, Frank G.
Bowman, Bruce R.
Konopliv, Alex
TI Satellite drag variability at Earth, Mars, and Venus due to solar
rotation
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article; Proceedings Paper
CT AIAA/AAS Astrodynamics Specialist Conference
CY AUG 21-24, 2006
CL Keystone, CO
SP AIAA, AAS
ID TERRESTRIAL PLANET THERMOSPHERES; CYCLE VARIATION; MODEL
AB Thermosphere densities from precise orbit determination of Mars Global Surveyor, Pioneer Venus Orbiter, and Magellan are used with contemporaneous data from six Earth-orbiting satellites to investigate the responses of these planetary satellite drag environments to changes in solar flux due to the sun's rotation. For comparative purposes, these results are cast in the form of equivalent exosphere temperature variations. Per 10-unit change in 10.7-cm radioflux (used as a proxy for extreme ultraviolet flux) reaching each planet, we find temperature changes of 20.6,7.0, and 2.0 K for Earth, Mars, and Venus, respectively. The different responses are thought to reflect the differing efficiencies Of CO(2) cooling and extreme ultraviolet heating in these upper atmospheres, and thus provide an important constraint on planetary atmosphere models that seek to self-consistently and interconsistently simulate the thermospheres of these planets. Our results also provide new data for empirical density models that are used to predict the satellite drag environments of these planets.
C1 [Forbes, Jeffrey M.] Univ Colorado, Dept Aerosp Engn Sci, UCB 429, Boulder, CO 80309 USA.
[Bruinsma, Sean] Ctr Natl Etud Spatiales, Dept Terr & Planetary Geodesy, F-31401 Toulouse, France.
[Lemoine, Frank G.] NASA, Goddard Space Flight Ctr, Planetary Geodynam Lab Code 698, Greenbelt, MD 20771 USA.
[Bowman, Bruce R.] USAF, Space Anal Div A9A, Colorado Springs, CO 80914 USA.
[Konopliv, Alex] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Forbes, JM (reprint author), Univ Colorado, Dept Aerosp Engn Sci, UCB 429, Boulder, CO 80309 USA.
RI Lemoine, Frank/D-1215-2013;
OI FORBES, JEFFREY/0000-0001-6937-0796
NR 15
TC 2
Z9 2
U1 0
U2 1
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD NOV-DEC
PY 2007
VL 44
IS 6
BP 1160
EP 1164
DI 10.2514/1.28013
PG 5
WC Engineering, Aerospace
SC Engineering
GA 241JN
UT WOS:000251652800003
ER
PT J
AU Pan, E
Wang, X
Albrecht, JD
AF Pan, E.
Wang, X.
Albrecht, J. D.
TI Decay rates for a transversely isotropic piezoelectric hollow circular
nanocolumn
SO JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN
LA English
DT Article
DE nanocolumn; decay rate; Saint-Venant's principle; transverse isotropy;
piezoelectricity; circular cylinder; three-dimensional elasticity
solution
ID GAN NANOCOLUMNS; CYLINDERS; STRAIN; SOLIDS
AB The decay rate of the elastic and electric fields along the growth direction of a transversely isotropic piezoelectric hollow or solid circular nanocolumn is investigated by developing the general solution for the corresponding three-dimensional problems. While the proposed method can be applied to asymmetric deformation, only axisymmetric deformation is considered in this paper. The derived results are first verified by comparison with existing elastic isotropic solutions. Then, the locus of smaller roots is plotted for different wall thicknesses, including also the limiting solid circular nanocolumn case. Owing to the material anisotropy and the coupling between the mechanical and electric fields, there exists an intriguing interaction of real and complex root loci for the torsionless axisymmetric deformation. The numerical results also show that the geometric parameter, material anisotropy, and piezoelectricity of the hollow or solid nanocolumn can substantially influence the decay rates, which can be applied to the strain relaxation analysis in novel semiconductor structures containing self-assembled nanoposts and nanocolumns.
C1 [Pan, E.; Wang, X.] Univ Akron, Dept Civil Engn, Akron, OH 44325 USA.
[Albrecht, J. D.] AF Res Lab, Wright Patterson AFB, OH USA.
RP Pan, E (reprint author), Univ Akron, Dept Civil Engn, Akron, OH 44325 USA.
EM pan2@uakron.edu
RI Pan, Ernian/F-4504-2011
OI Pan, Ernian/0000-0001-6640-7805
NR 22
TC 3
Z9 3
U1 1
U2 3
PU PROFESSIONAL ENGINEERING PUBLISHING LTD
PI WESTMINISTER
PA 1 BIRDCAGE WALK, WESTMINISTER SW1H 9JJ, ENGLAND
SN 0309-3247
J9 J STRAIN ANAL ENG
JI J. Strain Anal. Eng. Des.
PD NOV
PY 2007
VL 42
IS 8
BP 557
EP 567
DI 10.1243/03093247JSA324
PG 11
WC Engineering, Mechanical; Mechanics; Materials Science, Characterization
& Testing
SC Engineering; Mechanics; Materials Science
GA 242CL
UT WOS:000251702000002
ER
PT J
AU Hogan, FS
Krishnegowda, NK
Mikhailova, M
Kahlenberg, MS
AF Hogan, Fawn S.
Krishnegowda, Naveen K.
Mikhailova, Margarita
Kahlenberg, Morton S.
TI Flavonoid, silibinin, inhibits proliferation and promotes cell-cycle
arrest of human colon cancer
SO JOURNAL OF SURGICAL RESEARCH
LA English
DT Article
DE silibinin; milk; thistle; colon cancer; fet; geo; HCT116
ID DEPENDENT KINASE INHIBITORS; GROWTH-FACTOR-ALPHA; CARCINOMA-CELLS;
DNA-SYNTHESIS; MILK THISTLE; SILYMARIN; APOPTOSIS; ANTIOXIDANT;
EXPRESSION; DOXORUBICIN
AB Background. Anti-oxidative extracts from the milk thistle plant (Silybum marianum) have been shown to have antiproliferative effects in several tumor types. Silibinin is the primary active component isolated from the crude seed extract, silymarin. It has been used as a dietary supplement for hepatoprotection for over 2000 years. Silibinin has been shown to be safe in multiple animal models and has had no significant adverse events in human studies. We investigated the potential for this nontoxic flavolignan to inhibit proliferation of human colon cancer.
Materials and methods. Three well-characterized cell lines, Fet, Geo, and HCT116, were studied. The MTT cell-viability assay was performed to study the effect of silibinin on proliferation. Fluorescence-activated cell sorter (FACS) analysis was used to determine the effects of silibinin on cell cycle and apoptosis. 4', 6'-diamidine-2'-phenylindole (DAPI) staining with confocal microscopy was used to morphologically confirm these results. Poly ADP-ribose polymerase (PARP) cleavage and expression levels of p21, p27, cyclins B1/D1, and CDK-2 were measured. Cyclooxygenase-2 (COX-2) levels were also measured. The experiments were performed in triplicate and reported as mean values with standard errors. Means were contrasted using analysis of variance with Dunnet's correction for multiple testing. All statistical testing was two-sided with a significance level of 5%.
Results. The MTT assay revealed a strong dose-dependent inhibitory effect. Treatment with 75 mu g/mL resulted in 50% inhibition of cell-viability (IC-50) in Fet and Geo lines at 72 h. An IC50 dose of 40 ug/mL was obtained in HCT116, a poorly-differentiated cell line, at 72 h. FACS analysis demonstrated statistically significant cell-cycle arrest in all cell lines. G(2)-M phase arrests in Fet and Geo cell lines (P < 0.001) and a G1 arrest in HCT116 (P = 0.005) were noted. Trivial increases in early apoptotic rates (2% to 3%) for Geo and HCT116 were noted on FACS analysis via annexin V-propidium. iodide technique (P < 0.05), but no evidence for apoptosis was seen on Western blot for PARP cleavage or DAPI. Cyclin B1/D1 and CDK-2 levels were inhibited. Increased expression of cell cycle inhibitors, p21 or p27, was noted, and there was no effect on COX-2 expression.
Conclusions. Silibinin significantly inhibits proliferation through cell-cycle arrest via inhibition of cyclin-CDK promoter activity. Despite its antioxidant profile, there is no effect on COX-2 expression. Apoptosis does not appear to be greatly increased in human colon cancer cell lines Fet, Geo, and HCT116. Rather, inhibition of cell cycle regulatory proteins plays a fundamental role in silibinin's mechanism of action, and this may serve as a basis for combined use with conventional chemotherapeutics. (c) 2007 Elsevier Inc. All rights reserved.
C1 Univ Texas, Hlth Sci Ctr, Dept Surg, Sect Surg Oncol, San Antonio, TX 78229 USA.
Lackland AFB, Wilford Hall USAF Med Ctr, Dept Gen Surg, San Antonio, TX USA.
RP Hogan, FS (reprint author), Univ Texas, Hlth Sci Ctr, Dept Surg, Sect Surg Oncol, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA.
EM hoganf@uthscsa.edu
FU NCI NIH HHS [P30 CA54147]; NIA NIH HHS [P30 AG013319, P01AG19316]
NR 27
TC 84
Z9 87
U1 0
U2 14
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-4804
J9 J SURG RES
JI J. Surg. Res.
PD NOV
PY 2007
VL 143
IS 1
BP 58
EP 65
DI 10.1016/j.jss.2007.04.080
PG 8
WC Surgery
SC Surgery
GA 224MF
UT WOS:000250450400008
PM 17950073
ER
PT J
AU McFarland, MJ
Olivas, AC
Atkins, SG
Kennedy, RL
Patel, K
AF McFarland, Michael J.
Olivas, Arthur C.
Atkins, Sally G.
Kennedy, Robert L.
Patel, Kalpesh
TI Fugitive emissions opacity determination using the digital opacity
compliance system (DOCS)
SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
LA English
DT Article
AB Maintenance of Department of Defense (DoD) weapon systems, conducting battlefield training exercises as well as meeting military construction and/or demolition schedules, invariably generate fugitive air emissions, many of which are visible. Although there is no codified federal method for quantifying fugitive emissions opacity, many state and local air regulatory agencies have instituted enforceable fugitive emission opacity standards at DoD facilities. The current study focused on comparing the performance of the digital opacity compliance system (DOCS) with U.S. Environment Protection Agency Method 9 (Method 9) certified human observers in quantifying the visible opacity associated with fugitive emissions produced using a commercial fog generator. By systematically repositioning both DOCS cameras and Method 9-certified observers during field testing, differences in method performance as a function of observational locations were documented. At both the 30- and 300-ft off-set distances, opacity levels reported by the DOCS technology and Method 9-certified smoke readers were found to be statistically different at the 99% confidence level. Alternatively, at the 90- and 150-ft off-set distances, results suggested that there was an insignificant difference at the 99% confidence level between the two methods. Comparing the magnitude of the each method's standard deviation suggested that, at the 30-ft off-set distance, the DOCS technology was consistently more precise than Method 9-certified readers regardless of the observer's downwind distance. However, at the 90, 150, and 300-ft off-set distances, method precision seemed to vary as a function of both off-set and downwind distance. The primary factor affecting the consistency in opacity measurements appeared to be the impact of ground-level air turbulence on fog plume dispersion and transport. Field observations demonstrated that localized wind shear played a critical and decisive role in how and to what extent fugitive emissions opacity could be determined, regardless of the method selected.
C1 Utah State Univ, Dept Civil & Environm Engn, Logan, UT 84321 USA.
Hill AFB, UT Environm Management Directorate, Hill AFB, UT 84056 USA.
URS Corp, Herndon, VA USA.
Environm Div, Ft Hood, TX USA.
Washington Navy Yard, Naval Facil Engn Serv Ctr, Washington, DC USA.
RP McFarland, MJ (reprint author), Utah State Univ, Dept Civil & Environm Engn, 1405 Mt Logan Dr, Logan, UT 84321 USA.
EM farlandm@msn.com
NR 12
TC 2
Z9 2
U1 0
U2 1
PU AIR & WASTE MANAGEMENT ASSOC
PI PITTSBURGH
PA ONE GATEWAY CENTER, THIRD FL, PITTSBURGH, PA 15222 USA
SN 1047-3289
J9 J AIR WASTE MANAGE
JI J. Air Waste Manage. Assoc.
PD NOV
PY 2007
VL 57
IS 11
BP 1317
EP 1325
DI 10.3155/1047-3289.57.11.1317
PG 9
WC Engineering, Environmental; Environmental Sciences; Meteorology &
Atmospheric Sciences
SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric
Sciences
GA 228YL
UT WOS:000250768400004
PM 18069455
ER
PT J
AU Raley, JA
Yeo, YK
Hengehold, RL
Ryu, MY
Lu, YC
Wu, P
AF Raley, Jeremy A.
Yeo, Yung Kee
Hengehold, Robert L.
Ryu, Mee-Yi
Lu, Yicheng
Wu, Pan
TI Ferromagnetic properties of nickel implanted Al0.35Ga0.65N
SO JOURNAL OF THE KOREAN PHYSICAL SOCIETY
LA English
DT Article
DE AlGaN; dilute magnetic semiconductor (DMS); ferromagnetism;
implantation; superconducting quantum interference device (SQUID);
cathodoluminescence (CL); X-ray diffraction (XRD)
ID DILUTED MAGNETIC SEMICONDUCTORS; STRUCTURAL-PROPERTIES; SINGLE-CRYSTALS;
GAN; ALXGA1-XN; GROWTH; FILMS; ZNO; CO
AB Magnetic characterization studies of Ni-implanted Al0.35Ga0.65N have been made for various magnetic fields and sample temperatures by using a superconducting quantum interference device (SQUID). Ni ions were implanted at 200 keV to a dose of 3 x 1016 cm(-2) at room temperature. The material was found to show clear signs of ferromagnetism after annealing between 675 and 775 degrees C for 5 min. The ferromagnetic property persisted above room temperature, and a coercive field width of 118 Oe and a remanent field of 16 % of the saturation magnetization of 2.6 x 10(-5) emu were obtained at 300 K after annealing at an optimum annealing temperature of around 750 degrees C. This ferromagnetic property was also confirmed with field-cooled and zero-field-cooled magnetization measurements, and the Curie temperature was estimated to be around 350 K. Cathodoluminescence and X-ray diffraction (XRD) measurements showed that the significant implantation-related damage was recovered after annealing at 750 degrees C, indicating a good Ni incorporation in the Al0.35Ga0.65N. Furthermore, the XRD measurements also showed no indication of secondary phase formation or Ni clusters, which implies that we had observed a dilute ferromagnetic semiconductor behavior.
C1 Wright Patterson AFB, AF Inst Technol, Wright Patterson AFB, OH 45433 USA.
Kangwon Natl Univ, Dept Phys, Chunchon 200701, South Korea.
Rutgers State Univ, Piscataway, NJ 08854 USA.
RP Ryu, MY (reprint author), Wright Patterson AFB, AF Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM myryu@kangwon.ac.kr
NR 23
TC 2
Z9 2
U1 3
U2 5
PU KOREAN PHYSICAL SOC
PI SEOUL
PA 635-4, YUKSAM-DONG, KANGNAM-KU, SEOUL 135-703, SOUTH KOREA
SN 0374-4884
J9 J KOREAN PHYS SOC
JI J. Korean Phys. Soc.
PD NOV
PY 2007
VL 51
IS 5
BP 1707
EP 1712
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 232BF
UT WOS:000250992400017
ER
PT J
AU Deming, RW
AF Deming, Ross W.
TI Phase retrieval from intensity-only data by relative entropy
minimization
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND
VISION
LA English
DT Article
ID MINIMUM CROSS-ENTROPY; IMAGE-RECONSTRUCTION; QUADRATIC APPROACH;
FOURIER-TRANSFORM; ALGORITHM; DECONVOLUTION; CONVERGENCE; INFORMATION;
TOMOGRAPHY; HOLOGRAPHY
AB recursive algorithm, which appears to be new, is presented for estimating the amplitude and phase of a wave field from intensity-only measurements on two or more scan planes at different axial positions. The problem is framed as a nonlinear optimization, in which the angular spectrum of the complex field model is adjusted in order to minimize the relative entropy, or Kullback-Leibler divergence, between the measured and reconstructed intensities. The most common approach to this so-called phase retrieval problem is a variation of the well-known Gerchberg-Saxton algorithm devised by Misell (J. Phys. D 6, L6, 1973), which is efficient and extremely simple to implement. The new algorithm has a computational structure that is very similar to Misell's approach, despite the fundamental difference in the optimization criteria used for each. Based upon results from noisy simulated data, the new algorithm appears to be more robust than Misell's approach and to produce better results from low signal-to-noise ratio data. The convergence of the new algorithm is examined. (c) 2007 Optical Society of America.
C1 USAF, Res Lab, Electromagnet Scattering Branch, Bedford, MA 01731 USA.
Gen Dynam Informat Technol, Dayton, OH 45431 USA.
RP Deming, RW (reprint author), USAF, Res Lab, Electromagnet Scattering Branch, 80 Scott Drive,Hanscom Air Force Base, Bedford, MA 01731 USA.
EM ross.derning@hanscom.af.mil
NR 49
TC 5
Z9 5
U1 1
U2 4
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1084-7529
EI 1520-8532
J9 J OPT SOC AM A
JI J. Opt. Soc. Am. A-Opt. Image Sci. Vis.
PD NOV
PY 2007
VL 24
IS 11
BP 3666
EP 3679
DI 10.1364/JOSAA.24.003666
PG 14
WC Optics
SC Optics
GA 236WW
UT WOS:000251335100029
PM 17975593
ER
PT J
AU O'Connor, CFG
Deuster, PA
Henry, KA
Martindale, VE
Talbot, L
Jonas, W
Friedl, K
AF O'Connor, Francis G.
Deuster, Patricia A.
Henry, Kurt A.
Martindale, Valerie E.
Talbot, Laura
Jonas, Wayne
Friedl, Karl
TI Human performance optimization: An evolving charge to the department of
Defense
SO MILITARY MEDICINE
LA English
DT Article
AB Uniformed Services University of the Health Sciences hosted a conference in June 2006 entitled "Human Performance Optimization in the Department of Defense: Charting a Course for the Future" with the goal of developing a strategic plan for human performance optimization (HPO) within the Department of Defense (DoD). The conference identified key issues: (1) advocating for HPO at all DoD levels, (2) defining HPO specific to DoD requirements, (3) developing valid and standardized metrics for HPO, (4) translating HPO research into the operational community, and (5) establishing effective communication and coordination across military services and within the medical, research and operational communities. The program objectives should enhance mental and physical resilience of the war fighter; accelerate recovery; reduce injury and illness; provide seamless knowledge transfer from laboratory to line; improve the human system contribution to mission success; and allow the U.S. to remain in the lead in this area.
C1 Uniformed Serv Univ Hlth Sci, Dept Mil & Emergency Med, Bethesda, MD 20814 USA.
USN, Med Res Ctr, Silver Spring, MD 20910 USA.
USAF, Off Surgeon Gen, Washington, DC 20332 USA.
Uniformed Serv Univ Hlth Sci, Sch Nursing, Bethesda, MD 20814 USA.
Samueli Inst, Alexandria, VA 22314 USA.
Telemed & Adv Technol Res Ctr, Ft Detrick, MD 21702 USA.
RP O'Connor, CFG (reprint author), Uniformed Serv Univ Hlth Sci, Dept Mil & Emergency Med, 4301 Jones Bridge Rd, Bethesda, MD 20814 USA.
RI Deuster, Patricia/G-3838-2015;
OI Deuster, Patricia/0000-0002-7895-0888; Friedl, Karl/0000-0002-3134-8427
NR 6
TC 3
Z9 3
U1 0
U2 2
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 NOV
PY 2007
VL 172
IS 11
BP 1133
EP 1137
PG 5
WC Medicine, General & Internal
SC General & Internal Medicine
GA 232FS
UT WOS:000251004300001
ER
PT J
AU Yamane, GK
AF Yamane, Grover K.
TI Obesity in civilian adults: Potential impact on eligibility for US
military enlistment
SO MILITARY MEDICINE
LA English
DT Article
ID WEIGHT STANDARDS; UNITED-STATES; RISK
AB Objective: This study measures the prevalence in the civilian adult population of obesity for military enlistment. Methods: The National Health and Nutrition Examination Survey for 2001-2004 was used to obtain a sample of civilian adults 17 to 42 years of age. Weight standards for each branch of service were applied to determine the proportion of subjects who were over maximal weight limits and thus ineligible for enlistment. Results: Depending on the branch of service and the age range, 17.9% to 54.4% of men and 20.8% to 54.9% of women were overweight for enlistment. Generally, there were higher prevalence rates in the older age groups and among women. Prevalence rates for non-Caucasian subjects were not higher among men but were higher among women. Conclusion: Large proportions of civilian adults are over the weight limits for military enlistment. The currently increasing prevalence of obesity in the civilian population may pose a challenge for military recruitment programs.
C1 USAF, Inst Operat Hlth, Epidemiol Serv Branch, Brooks AFB, TX 78235 USA.
RP Yamane, GK (reprint author), USAF, Inst Operat Hlth, Epidemiol Serv Branch, Brooks AFB, TX 78235 USA.
NR 14
TC 14
Z9 14
U1 1
U2 2
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 NOV
PY 2007
VL 172
IS 11
BP 1160
EP 1165
PG 6
WC Medicine, General & Internal
SC General & Internal Medicine
GA 232FS
UT WOS:000251004300006
PM 18062389
ER
PT J
AU Allred, CL
Borenstein, JT
Hobbs, LW
AF Allred, Clark L.
Borenstein, Jeffrey T.
Hobbs, Linn W.
TI Neutron irradiation-induced dimensional changes in MEMS glass substrates
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article
DE glass; MEMS; radiation damage
ID VITREOUS SILICA; RADIATION
AB A study is made of radiation-induced expansion/compaction in Pyrex(R) (Corning 7740) and Hoya SD-2(R) glasses, which are used as substrates for MEMS devices. Glass samples were irradiated with a neutron fluence composed primarily of thermal neutrons, and a flotation technique was employed to measure the resulting density changes in the glass. Transport of Ions in Matter (TRIM) calculations were performed to relate fast (similar to 1 MeV) neutron atomic displacement damage to that of boron thermal neutron capture events, and measured density changes in the glass samples were thus proportionally attributed to thermal and fast neutron fluences. Pyrex was shown to compact at a rate of (in Delta rho/rho per n/cm(2)) 8.14 x 10(-20) (thermal) and 1.79 x 10(-20) (fast). The corresponding results for Hoya SD-2 were 2.21 X 10(-21) and 1.71 X 10(-21), respectively. On a displacement per atom (dpa) basis, the compaction of the Pyrex was an order of magnitude greater than that of the Hoya SD-2. Our results are the first reported measurement of irridiation-induced densification in Hoya SD-2. The compaction of Pyrex agreed with a previous study. Hoya SD-2 is of considerable importance to MEMS, owing to its close thermal expansivity match to silicon from 25 to 500 degrees C. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Allred, Clark L.] USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
[Borenstein, Jeffrey T.] Charles Stark Draper Lab Inc, Cambridge, MA 02139 USA.
[Hobbs, Linn W.] MIT, Cambridge, MA 02139 USA.
RP Allred, CL (reprint author), USAF Acad, Dept Phys, 2354 Fairchild Dr, Colorado Springs, CO 80840 USA.
EM allredcs@comcast.net
NR 21
TC 6
Z9 6
U1 1
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD NOV
PY 2007
VL 264
IS 1
BP 66
EP 72
DI 10.1016/j.nimb.2007.07.019
PG 7
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 242PI
UT WOS:000251737300011
ER
PT J
AU Baillargeon, J
Langevin, AM
Lewis, M
Estrada, J
Grady, JJ
Mullins, J
Pitney, A
Pollock, BH
AF Baillargeon, Jacques
Langevin, Anne-Marie
Lewis, Margaret
Estrada, Jaime
Grady, James J.
Mullins, Judith
Pitney, Aaron
Pollock, Brad H.
TI Demographic correlates of body size changes in children undergoing
treatment for acute lymphoblastic leukemia
SO PEDIATRIC BLOOD & CANCER
LA English
DT Article
DE acute lymphoblastic leukemia; body mass index; obesity; cancer risk;
hispanic
ID CRANIAL IRRADIATION; ENERGY-EXPENDITURE; ADOLESCENT OBESITY; METABOLIC
SYNDROME; CHILDHOOD; SURVIVORS; THERAPY; WEIGHT; CHEMOTHERAPY;
PREVALENCE
AB Introduction. While it is known that leukemia therapy is associated with obesity in survivorship, limited information is available on its time-related pattern of development and its variation across patient subgroups. The goal of the present study was to examine demographic correlates of body mass index (BMI) changes over time from diagnosis through chemotherapy for children with B-precursor acute lymphoblastic leukemia (ALL). Methods. The study cohort consisted of 307 pediatric patients diagnosed with ALL who were treated at four South Texas pediatric oncology centers between 1990 and 2002. To minimize treatment-related variability, we excluded patients who received cranial irradiation as part of their treatment. Variation in age- and gender-standardized BMI z-scores according to age at diagnosis, gender, and ethnicity were assessed. Results. The overall study cohort exhibited an increase in age- and gender-adjusted BMI z-scores for the first 24 months of chemotherapy followed by a slight decrease in BMI at 30 months (end of therapy). A repeated measures analysis indicated a statistically significant difference in the time-related pattern of BMI changes for age at diagnosis (P=0.001) but no significant effect for gender (P=0.32) or Hispanic versus non-Hispanic ethnicity (P=0.89). Discussion. In our cohort of ALL patients, BMI was elevated at diagnosis (mean standardized BMI z-score = 0.22, standard deviation = 1 A) then increased and remained elevated for the entire duration of chemotherapy. Children who were 2-9 years of age at diagnosis began therapy with a substantially lower BMI and remained lower over the course of chemotherapy than patients aged 10-18 years at diagnosis. It will be important for future investigations to explore the biological and behavioral factors that may underlie such differential patterns of BMI change over time. Pediatr Blood Cancer 2007;49:793-796. (c) 2006 Wiley-Liss, Inc.
C1 Univ Texas, Hlth Sci Ctr, Dept Epidemiol & Biostat, San Antonio, TX 78229 USA.
Univ Texas, Hlth Sci Ctr, Dept Pediat, San Antonio, TX 78284 USA.
CHRISTUS Santa Rosa Childrens Hosp, San Antonio, TX USA.
Methodist Childrens Hosp S Texas, San Antonio, TX USA.
Univ Texas, Med Branch, Dept Prevent Med & Community Hlth, Galveston, TX 77555 USA.
Driscoll Childrens Hosp, Corpus Christi, TX USA.
Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
RP Baillargeon, J (reprint author), Univ Texas, Hlth Sci Ctr, Dept Epidemiol & Biostat, 7703 Floyd Curl Dr,MSC 7933, San Antonio, TX 78229 USA.
EM baillargeon@uthscsa.edu
FU NCI NIH HHS [CA11078]
NR 34
TC 12
Z9 12
U1 1
U2 1
PU WILEY-LISS
PI HOBOKEN
PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 1545-5009
J9 PEDIATR BLOOD CANCER
JI Pediatr. Blood Cancer
PD NOV
PY 2007
VL 49
IS 6
BP 793
EP 796
DI 10.1002/pbc.21063
PG 4
WC Oncology; Hematology; Pediatrics
SC Oncology; Hematology; Pediatrics
GA 216ME
UT WOS:000249881300006
PM 17066457
ER
PT J
AU Bogdanov, EA
DeJoseph, CA
Demidov, VI
Kudryavtsev, AA
Serditov, KY
AF Bogdanov, E. A.
DeJoseph, C. A., Jr.
Demidov, V. I.
Kudryavtsev, A. A.
Serditov, K. Yu
TI Influence of an additional ballast volume on a pulsed ICP discharge
SO PLASMA SOURCES SCIENCE & TECHNOLOGY
LA English
DT Article
ID INDUCTIVELY-COUPLED PLASMAS; ENERGY DISTRIBUTION FUNCTION; XENON EXCIMER
LAMP; POSITIVE-COLUMN; METASTABLE ATOMS; OXYGEN DISCHARGE;
GLOW-DISCHARGE; ARGON PLASMA; GLOBAL-MODEL; HIGH-DENSITY
AB A spatial and temporal numerical simulation has been carried out of a pulsed (100% modulated), rf inductively coupled plasma discharge in argon, connected to an additional (ballast) diffusion chamber of much larger volume. It is demonstrated that during the active phase, the presence of the large ballast volume has a small impact on the parameters of the plasma in the smaller discharge chamber. In this case the plasma parameters in the discharge chamber can be estimated separately from the diffusion chamber by a standard method using the characteristic ambipolar diffusion time (for example, using a global model). However, during the afterglow phase, the situation is changed significantly. In the afterglow, the densities of charged particles in the discharge chamber become lower than in the large ballast chamber due to more rapid diffusion loss. As a result, the reverse of the active phase situation occurs, namely, the plasma does not flow from the small to the large chamber, but in the opposite direction, from diffusive to discharge volume, and both the plasma density gradient and the self-consistent ambipolar electric field in the small chamber change directions. This phenomenon leads to new effects in the discharge volume, in particular a decreasing rate of decay of densities of charged particles and electron temperature. Thus, in the afterglow the presence of a large additional ballast volume has a significant impact on the plasma transport. In this case, a simple treatment of the plasma in the discharge chamber in the framework of a spatially averaged model (for example, the global model) is inadequate.
C1 St Petersburg State Univ, St Petersburg 198904, Russia.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA.
RP DeJoseph, CA (reprint author), St Petersburg State Univ, St Petersburg 198904, Russia.
EM charles.dejoseph@wpafb.af.mil
RI Demidov, Vladimir/A-4247-2013; Bogdanov, Evgeny/I-3232-2012;
Kudryavtsev, Anatoly/I-3413-2012
OI Demidov, Vladimir/0000-0002-2672-7684; Bogdanov,
Evgeny/0000-0002-3397-3162; Kudryavtsev, Anatoly/0000-0002-2232-2954
NR 32
TC 6
Z9 6
U1 1
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0963-0252
EI 1361-6595
J9 PLASMA SOURCES SCI T
JI Plasma Sources Sci. Technol.
PD NOV
PY 2007
VL 16
IS 4
BP 697
EP 702
DI 10.1088/0963-0252/16/4/002
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 228JX
UT WOS:000250727300004
ER
PT J
AU Sands, BL
Siefert, NS
Ganguly, BN
AF Sands, Brian L.
Siefert, Nicholas S.
Ganguly, Biswa N.
TI Design and measurement considerations of hairpin resonator probes for
determining electron number density in collisional plasmas
SO PLASMA SOURCES SCIENCE & TECHNOLOGY
LA English
DT Article
ID MICROWAVE; FLUOROCARBON; IONIZATION
AB The hairpin resonator probe has been developed in recent years into a sophisticated diagnostic technique capable of measuring spatially resolved electron number densities in sub-Torr discharges. In this paper, we extend the use of this technique to discharges at pressures greater than 1 Torr. In this regime, the effects of electron-neutral collisions become significant and a suitable correction is applied in conjunction with the sheath correction. We also describe elements of hairpin design and coupling that need to be more carefully controlled in order to maximize the range of electron densities that can be detected at higher pressures. Finally, we discuss limitations to the transmission-line model used routinely to interpret hairpin data as they apply to measurements in a nonuniform plasma.
C1 UES Inc, Wright Patterson AFB, OH 45433 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Sands, BL (reprint author), UES Inc, Wright Patterson AFB, OH 45433 USA.
EM brian.sands@wpafb.af.mil; nsiefert@mit.edu
NR 18
TC 13
Z9 15
U1 1
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0963-0252
J9 PLASMA SOURCES SCI T
JI Plasma Sources Sci. Technol.
PD NOV
PY 2007
VL 16
IS 4
BP 716
EP 725
DI 10.1088/0963-0252/16/4/005
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 228JX
UT WOS:000250727300007
ER
PT J
AU Putthanarat, S
Tandon, GP
Schoeppner, GA
AF Putthanarat, S.
Tandon, G. P.
Schoeppner, G. A.
TI Influence of polishing time on thermo-oxidation characterization of
isothermally aged PMR-15 resin
SO POLYMER DEGRADATION AND STABILITY
LA English
DT Article
DE nanoindentation; modulus; surface profile; optical microscopy
ID WHITE-LIGHT INTERFEROMETRY; MECHANICAL-PROPERTIES; SURFACE-ROUGHNESS;
MICRO-INDENTATION; NANO-INDENTATION; NANOINDENTATION; OXIDATION;
MODULUS; COMPOSITES; POLYMERS
AB The effect of polishing time on measured oxidation thickness and elastic modulus of isothermally aged PMR-15 neat resin was investigated. A specimen aged 956 h in ambient air at 288 degrees C (550 degrees F) was selected for this study. Thermo-oxidation of the specimen results in a surface oxidation layer with different stiffness and polishing characteristics than the interior of the specimen. The specimen was repolished at consecutive time periods from a quick polishing time to extensive polishing time. A white light interferometer was used as a surface profiler to measure height variations from the specimen edges into the interior of the material. Subsequently, optical microscopy and nanoindentation experiments were conducted to correlate observations of oxidation thickness and elastic modulus measurements with polishing time. The modulus profiles obtained from nanoindentation experiments indicate formation of an outer brittle layer followed by a sharp drop in the transition region to the unoxidized interior. The oxidized material is polished at a greater rate than the unoxidized material. The maximum variation in the surface profile from polishing was limited to 5 mu m across the oxidation layer (similar to 150 mu m), which results in a slope of similar to 2 degrees over the oxidized region. Optical measurements of thickness of oxidized layer and transition region are in good agreement with the height and modulus profiles obtained using the interferometer and nanoindenter, respectively. Results from three techniques show that the measured oxidation thickness and elastic modulus are relatively independent of the polishing time. (c) 2007 Elsevier Ltd. All rights reserved.
C1 [Putthanarat, S.; Tandon, G. P.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Schoeppner, G. A.] USAF, Res Lab, MLBC, WPAFB, Wright Patterson AFB, OH USA.
RP Tandon, GP (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
EM g.tandon@wpafb.af.mil
NR 31
TC 13
Z9 13
U1 1
U2 2
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0141-3910
J9 POLYM DEGRAD STABIL
JI Polym. Degrad. Stabil.
PD NOV
PY 2007
VL 92
IS 11
BP 2110
EP 2120
DI 10.1016/j.polymdegradstab.2007.07.007
PG 11
WC Polymer Science
SC Polymer Science
GA 241OD
UT WOS:000251664800018
ER
PT J
AU Beall, DP
Googe, JD
Moss, JT
Ly, JQ
Greer, BJ
Stapp, AM
Martin, HD
AF Beall, Douglas P.
Googe, J. David
Moss, Jason T.
Ly, Justin Q.
Greer, Barry J.
Stapp, Annette M.
Martin, Hal D.
TI Magnetic resonance imaging of the collateral ligaments and the anatomic
quadrants of the knee (Reprinted form Radio Clin N Am, vol 45, pg
983-1002, 2007)
SO RADIOLOGIC CLINICS OF NORTH AMERICA
LA English
DT Reprint
ID MEDIAL PATELLOFEMORAL LIGAMENT; SOFT-TISSUE RESTRAINTS; ROTATORY
INSTABILITY; PATELLAR DISLOCATION; POSTEROLATERAL ASPECT; POSTEROMEDIAL
CORNER; CRUCIATE LIGAMENT; POPLITEUS TENDON; ILIOTIBIAL TRACT; TIBIAL
CONDYLE
AB Injuries to the lateral and medial supporting structures of the knee can be significantly disabling and somewhat difficult to detect and evaluate clinically. An accurate imaging evaluation of these structures requires the use of the appropriate MR imaging sequences and the detailed knowledge of the anatomic structures that are present in these locations. Normal function is dependent on the integrity of the complex functional structures and effective clinical treatment, including surgical repair, of these structures is predicated on an optimal diagnostic evaluation. A successful diagnostic evaluation can expedite treatment and provide the best opportunity for a favorable long-term outcome.
C1 Clin Radiol Oklahoma, Oklahoma City, OK 73103 USA.
Univ Oklahoma, Hlth Sci Ctr, Dept Orthoped, Oklahoma City, OK 73118 USA.
Texas Tech Univ, Coll Med, Lubbock, TX 79416 USA.
Wilford Hall USAF Med Ctr, Dept Radiol, Lackland AFB, TX 78236 USA.
Clin Radiol Oklahoma, Edmond, OK 73003 USA.
Oklahoma Sports Sci & Orthopaed, Edmond, OK 73118 USA.
RP Beall, DP (reprint author), Clin Radiol Oklahoma, 610 NW 14th St, Oklahoma City, OK 73103 USA.
EM dpb@okss.com
NR 50
TC 7
Z9 8
U1 0
U2 0
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 0033-8389
J9 RADIOL CLIN N AM
JI Radiol. Clin. N. Am.
PD NOV
PY 2007
VL 45
IS 6
BP 983
EP +
DI 10.1016/j.rcl.2007.08.006
PG 21
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 237HK
UT WOS:000251364600006
PM 17981179
ER
PT J
AU Qu, LT
Chen, W
Dai, LM
Roy, A
Tolle, TB
AF Qu, Liangti
Chen, Wei
Dai, Liming
Roy, Ajit
Tolle, Tia Benson
TI Polymer and aligned carbon nanotube nanocomposites and nanodevices
SO SAMPE JOURNAL
LA English
DT Article
ID METAL NANOPARTICLES; CONDUCTING POLYMERS; TECHNOLOGY; COMPOSITES;
SENSORS; ARRAYS
AB We have previously developed a simplepyrolytic method for large-scale production of aligned carbon nanotube arrays perpendicular to the substrate. These aligned carbon nanotube arrays can be transferred onto various substrates of particular interest in either a patterned or non-patterned fashion. The well-aligned structure provides additional advantages for not only an efficient device construction but also surface functionalization (both the inner and outer wall). The surface functionalization of aligned carbon nanotubes is particularly attractive, as it allows surface characteristics of the aligned carbon nanotubes to be tuned to meet specific requirements for particular applications while their alignment structure can be largely retained. These aligned carbon nanotubes with tunable surface characteristics are of great significance to various practical applications, including nanotube sensors and optoelectronics. For instance, we have previously immobilized glucose oxidase (GOX) onto the aligned multi-wall carbon nanotube arrays by electropolymerization of pyrrole in the presence of GOX The resultant GOX-containing polypyrrole-carbon nanotube coaxial nanowires were shown to be promising new sensing active materials for making advanced glucose sensors with a high sensitivity. Also, single-strand DNA chains have recently been chemically grafted onto aligned carbon nanotube electrodes, leading to novel aligned carbon nanotube-DNA sensors of a high sensitivity and selectivity for probing complementary DNA and target DNA chains of specific sequences. More recently, we have also developed a rational approach to partially coat perpendicularly-aligned carbon nanotube arrays with an appropriate polymer thin film along their tube length to create synergetic effects, which provide the basis for developing novel sensors for the detection of chemical vapors, thermal and mechanical stimuli with a high sensitivity, good selectivity, excellent environmental stability, and low power consumption. In this talk, we will summarize our work on the preparation of polymer and aligned carbon nanotube nanocomposites and nanodevices. Potential applications of polymer and aligned carbon nanotube nanocomposites in other areas will also be discussed.
C1 Univ Dayton, Sch Engn, Dept Chem & Mat Engn, Dayton, OH 45469 USA.
Univ Dayton, UDRI, Dayton, OH 45469 USA.
MLBC, AF Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH USA.
RP Qu, LT (reprint author), Univ Dayton, Sch Engn, Dept Chem & Mat Engn, Dayton, OH 45469 USA.
EM ldai@udayton.edu
NR 25
TC 1
Z9 1
U1 2
U2 27
PU SAMPE PUBLISHERS
PI COVINA
PA 1161 PARKVIEW DRIVE, COVINA, CA 91722 USA
SN 0091-1062
J9 SAMPE J
JI Sampe J.
PD NOV-DEC
PY 2007
VL 43
IS 6
BP 38
EP 46
PG 9
WC Engineering, Multidisciplinary; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA 223FU
UT WOS:000250355900005
ER
PT J
AU Choi, YS
Uchic, MD
Parthasarathy, TA
Dimiduk, DM
AF Choi, Y. S.
Uchic, M. D.
Parthasarathy, T. A.
Dimiduk, D. M.
TI Numerical study on microcompression tests of anisotropic single crystals
SO SCRIPTA MATERIALIA
LA English
DT Article
DE microcompression; elastic behavior; slip; finite element analysis;
simulation
ID DEPENDENCE; PLASTICITY; SCALE
AB Using a crystallographic elastic-viscoplastic finite element method, the present study investigated two primary factors influencing the measured properties from microcompression tests for anisotropic single crystals: the effect of the sample geometry on the measured elastic response, and the effect of misalignment between the compression platen and the sample on the measured elastic and plastic response. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
C1 AFRL MLLM, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
Universal Energy Syst Inc, Dayton, OH 45432 USA.
RP Choi, YS (reprint author), AFRL MLLM, Air Force Res Lab, 2230 Tent St, Wright Patterson AFB, OH 45433 USA.
EM Yoon-Suk.Choi@wpafb.af.mil
RI Parthasarathy, Triplicane/B-7146-2011
OI Parthasarathy, Triplicane/0000-0002-5449-9754
NR 10
TC 31
Z9 31
U1 2
U2 14
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD NOV
PY 2007
VL 57
IS 9
BP 849
EP 852
DI 10.1016/j.scriptamat.2007.06.057
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 208ZB
UT WOS:000249356800016
ER
PT J
AU Voevodin, AA
Vaia, RA
Patton, ST
Diamanti, S
Pender, M
Yoonessi, M
Brubaker, J
Hu, JJ
Sanders, JH
Phillips, BS
MacCuspie, RI
AF Voevodin, Andrey A.
Vaia, Richard A.
Patton, Steven T.
Diamanti, Steven
Pender, Mark
Yoonessi, Mitra
Brubaker, Jennifer
Hu, Jian-Jun
Sanders, Jeffrey H.
Phillips, Benjamin S.
MacCuspie, Robert I.
TI Nanoparticte-wetted surfaces for relays and energy transmission contacts
SO SMALL
LA English
DT Article
DE nanoparticles; gold; platinum; relays
ID LIQUID-LIKE BEHAVIOR; MECHANICAL-PROPERTIES; ADHESION
AB Submonolayer coatings of noble-metal nanoparticle liquids (NPLs) are shown to provide replenishable surfaces with robust asperities and metallic conductivity that extends the durability of electrical relays by 10 to 100 times (depending on the current driven through the contact) as compared to alternative approaches. NPLs are single-component materials consisting of a metal nanoparticle core (5-20 nn Au or Pt nanoparticles) surrounded by a covalently tethered ionic-liquid corona of 1.5 to 2 nm. Common relay failure modes, such as stiction, surface distortion, and contact shorting, are suppressed with the addition of a submonolayer of NPLs to the contact surfaces. This distribution of NPLs results in a force profile for a contact-retraction cycle that is distinct from bare Au contacts and thicker, multilayer coatings of NPLs. Postmortem examination reveals a substantial decrease in topological change of the electrode surface relative to bare contacts, as well as an indication of lateral migration of the nanoparticles from the periphery towards the contact. A general extension of this concept to dynamic physical interfaces experiencing impact, sliding, or rolling affords alternatives to increase reliability and reduced losses for transmittance of electrical and mechanical energy.
C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Voevodin, AA (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM andrey.voevodin@wpafb.af.mil
RI Voevodin, Andrey/I-6684-2013;
OI MacCuspie, Robert/0000-0002-6618-6499
NR 21
TC 26
Z9 27
U1 0
U2 9
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1613-6810
J9 SMALL
JI Small
PD NOV
PY 2007
VL 3
IS 11
BP 1957
EP 1963
DI 10.1002/smll.200700500
PG 7
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 232SD
UT WOS:000251038800020
PM 17963285
ER
PT J
AU Luckarift, HR
Greenwald, R
Bergin, MH
Spain, JC
Johnson, GR
AF Luckarift, Heather R.
Greenwald, Roby
Bergin, Mike H.
Spain, Jim C.
Johnson, Glenn R.
TI Biosensor system for continuous monitoring of organophosphate aerosols
SO BIOSENSORS & BIOELECTRONICS
LA English
DT Article
DE enzyme immobilization; butyrylcholinesterase; organophosphate hydrolase;
biosensor; impinger; aerosol sampling
ID GAS-CHROMATOGRAPHY; INDOOR AIR; HYDROLASE; CHOLINESTERASE;
ACETYLCHOLINESTERASE; IMMOBILIZATION; REACTIVATION; NEUROTOXINS;
HYDROLYSIS; PESTICIDES
AB An enzyme-based monitoring system provides the basis for continuous sampling of organophosphate contamination in air. The enzymes butyrylcholinesterase (BuChE) and organophosphate hydrolase (OPH) are stabilized by encapsulation in biomimetic silica nanoparticles, entrained within a packed bed column. The resulting immobilized enzyme reactors (IMERs) were integrated with an impinger-based aerosol sampling system for collection of chemical. contaminants in air. The sampling system was operated continuously and organophosphate detection was performed in real-time by single wavelength analysis of enzyme hydrolysis products. The resulting sensor system detects organophosphates based on either enzyme inhibition (of BuChE) or substrate hydrolysis (by OPH). The detection Limits of the IMERs for specific organophosphates are presented and discussed. The system proved suitable for detection of a range of organophosphates including paraoxon, demeton-S and malathion. (c) 2007 Elsevier B.V. All rights reserved.
C1 AF Res Lab, Tyndall AFB, FL 32403 USA.
Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA.
Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA.
RP Luckarift, HR (reprint author), AF Res Lab, 139 Barnes Dr,Suite 2, Tyndall AFB, FL 32403 USA.
EM hluckarift@gtcom.net
NR 21
TC 29
Z9 30
U1 1
U2 15
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 OCT 31
PY 2007
VL 23
IS 3
BP 400
EP 406
DI 10.1016/j.bios.2007.04.023
PG 7
WC Biophysics; Biotechnology & Applied Microbiology; Chemistry, Analytical;
Electrochemistry; Nanoscience & Nanotechnology
SC Biophysics; Biotechnology & Applied Microbiology; Chemistry;
Electrochemistry; Science & Technology - Other Topics
GA 226TZ
UT WOS:000250612700013
PM 17582755
ER
PT J
AU Svalgaard, L
Cliver, EW
AF Svalgaard, Leif
Cliver, Edward W.
TI Interhourly variability index of geomagnetic activity and its use in
deriving the long-term variation of solar wind speed
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID INTERPLANETARY MAGNETIC-FIELD; SEMIANNUAL VARIATION; AA INDEX; CYCLE;
DISTURBANCES; STRENGTH; MINIMUM; IHV; SUN
AB We describe the detailed derivation of the interhourly variability (IHV) index of geomagnetic activity. The IHV index for a given geomagnetic element is mechanically derived from hourly values or means as the sum of the unsigned differences between adjacent hours over a 7-hour interval centered on local midnight. The index is derived separately for stations in both hemispheres within six longitude sectors spanning the Earth using only local night hours. It is intended as a long- term index and available data allows derivation of the index back well into the 19th century. On a timescale of a 27-day Bartels rotation, IHV averages for stations with corrected geomagnetic latitude less than 55 degrees are strongly correlated with midlatitude range indices (R-2 = 0.96 for the am index since 1959; R-2 = 0.95 for the aa index since 1980). We find that observed yearly averages of aa before the year 1957 are similar to 3 nT too small compared to values calculated from IHV using the regression constants based on 1980-2004. We interpret this discrepancy as an indication that the calibration of the aa index is in error before 1957. There is no systematic discrepancy between observed and similarly calculated ap values back to 1932. Bartels rotation averages of IHV are also strongly correlated with solar wind parameters (R-2 = 0.79 with BV2). On a timescale of a year combining the IHV index (giving BV2 with R-2 = 0.93) and the recently developed interdiurnal variability (IDV) index (giving interplanetary magnetic field magnitude, B, with R-2 = 0.74) allows determination of solar wind speed, V, from 1890 to present. Over the similar to 120- year series, the yearly mean solar wind speed varied from a low (inferred) of 303 km/ s in 1902 to a high (observed) value of 545 km/ s in 2003. The calculated yearly values of the product BV using B and V separately derived from IDV and IHV agree quantitatively with (completely independent) BV values derived from the amplitude of the diurnal variation of the horizontal component in the polar caps since 1926 (and sporadically further back).
C1 Easy Toolkit Inc, Houston, TX USA.
Hanscom AFB, AF Res Lab, Space Vehicles Directorate, Bedford, MA 01731 USA.
RP Svalgaard, L (reprint author), Easy Toolkit Inc, 6927 Lawler Ridge, Houston, TX USA.
EM leif@leif.org; edward.cliver@hanscom.af.mil
NR 61
TC 54
Z9 54
U1 0
U2 2
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 OCT 31
PY 2007
VL 112
IS A10
AR A10111
DI 10.1029/2007JA012437
PG 32
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 228EP
UT WOS:000250710500004
ER
PT J
AU Li, Q
Green, L
Venkataraman, N
Shiyanovskaya, I
Khan, A
Urbas, A
Doane, JW
AF Li, Quan
Green, Lisa
Venkataraman, Nithya
Shiyanovskaya, Irina
Khan, Asad
Urbas, Augustine
Doane, J. William
TI Reversible photoswitchable axially chiral dopants with high helical
twisting power
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID LIQUID-CRYSTALS; PHASE-TRANSITION; AZOBENZENE; PHOTOISOMERIZATION; LIGHT
AB A new class of photoswitchable axially chiral dopants with high helical twisting power was synthesized. Their reversible photoresponsive properties were well demonstrated. These materials are found suitable for dopants in chiral nematic materials for applications in novel optically addressed displays, i.e., photodisplay. Optically addressed images were demonstrated. The dopants were sufficiently responsive to an addressing light source such that a high-resolution image with gray scale could be imaged in a few seconds of irradiation time. It was further found that an image could be retained on the screen at room temperature for 24 h before being thermally erased. The high solubility of these materials in a nematic host is also of commercial interest for stability in display applications. It is worth noting here that the photodisplay device can display a high-resolution image without the need of attached drive and control electronics, substantially reducing the cost of the display unit for use in applications where paper is currently used. Their high twisting power and large solubility in common nematic liquid crystal host can facilitate small amounts of doping to induce mesophase chirality and magnify the photocontrol effect.
C1 Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA.
Kent Displays Inc, Kent, OH 44240 USA.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Li, Q (reprint author), Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA.
EM quan@lci.kent.edu
NR 19
TC 113
Z9 114
U1 8
U2 52
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD OCT 31
PY 2007
VL 129
IS 43
BP 12908
EP +
DI 10.1021/ja0747573
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 229QK
UT WOS:000250818900004
PM 17927184
ER
PT J
AU Battula, A
Lu, YL
Knize, RJ
Reinhardt, K
Chen, SC
AF Battula, Arvind
Lu, Yalin
Knize, R. J.
Reinhardt, Kitt
Chen, Shaochen
TI Tunable transmission at 100 THz through a metallic hole array with a
varying hole channel shape
SO OPTICS EXPRESS
LA English
DT Article
ID TERAHERTZ TRANSMISSION; OPTICAL-TRANSMISSION; LIGHT TRANSMISSION;
SURFACE-PLASMONS; GRATINGS; CRYSTAL; DEPTH; FILMS; SIZE; THIN
AB Extraordinary optical transmission spectrum for a two-dimensional metallic hole array (2D-MHA) changes with the hole channel shape. In this paper a new converging-diverging channel (CDC) shape is proposed. A three-dimensional (3D) finite element method is utilized to analyze the transmission characteristics of the 2D-MHA with CDC. The transmission peaks are blue-shifted when the gap at the throat of CDC is reduced. Similar blue-shift in the transmission peaks are observed for a straight channel MHA when the aperture size is reduced. The transmission for the straight channel MHA is not sensitive to the metal film thickness. But, for a CDC MHA the transmission varies with the metal film thickness. Also, the CDC shape gives an extra degree of geometrical variable to 2D-MHA for tuning the transmission peak location with potential applications in nanolithography, imaging and biosensing. (C) 2007 Optical Society of America.
C1 Univ Texas, Dept Mech Engn, Austin, TX 78712 USA.
Univ Texas Austin, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA.
USAF Acad, Dept Phys, Laser Opt Res Ctr, Colorado Springs, CO 80840 USA.
AFOSR NE, Arlington, VA 22203 USA.
RP Chen, SC (reprint author), Univ Texas, Dept Mech Engn, Austin, TX 78712 USA.
EM scchen@mail.utexas.edu
NR 33
TC 13
Z9 13
U1 0
U2 5
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD OCT 29
PY 2007
VL 15
IS 22
BP 14629
EP 14635
DI 10.1364/OE.15.014629
PG 7
WC Optics
SC Optics
GA 235HD
UT WOS:000251223400039
PM 19550743
ER
PT J
AU Tang, XN
Houchins, C
Lau, KC
Ng, CY
Dressler, RA
Chiu, YH
Chu, TS
Han, KL
AF Tang, Xiaonan
Houchins, Cassidy
Lau, Kai-Chung
Ng, C. Y.
Dressler, Rainer A.
Chiu, Yu-Hui
Chu, Tian-Shu
Han, Ke-Li
TI A time-dependent wave packet quantum scattering study of the reaction
HD+ (v=0-3; j(0)=1)+He -> HeH+(HeD+)+D(H)
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID POTENTIAL-ENERGY SURFACES; COLLINEAR REACTION HE+H-2(+)->HEH++H;
COLLISION-INDUCED DISSOCIATION; TRANSITION-STATE RESONANCES;
PROTON-TRANSFER REACTION; ION-MOLECULE REACTIONS; MECHANICAL
CALCULATIONS; REACTION PROBABILITIES; VIBRATIONAL-EXCITATION;
CROSS-SECTIONS
AB Time-dependent wave packet quantum scattering (TWQS) calculations are presented for HD+(v=0-3;j(0)=1)+He collisions in the center-of-mass collision energy (E-T) range of 0.0-2.0 eV. The present TWQS approach accounts for Coriolis coupling and uses the ab initio potential energy surface of Palmieri [Mol. Phys. 98, 1839 (2000)]. For a fixed total angular momentum J, the energy dependence of reaction probabilities exhibits quantum resonance structure. The resonances are more pronounced for low J values and for the HeH++D channel than for the HeD++H channel and are particularly prominent near threshold. The quantum effects are no longer discernable in the integral cross sections, which compare closely to quasiclassical trajectory calculations conducted on the same potential energy surface. The integral cross sections also compare well to recent state-selected experimental values over the same reactant and translational energy range. Classical impulsive dynamics and steric arguments can account for the significant isotope effect in favor of the deuteron transfer channel observed for HD+(v < 3) and low translational energies. At higher reactant energies, angular momentum constraints favor the proton-transfer channel, and isotopic differences in the integral cross sections are no longer significant. The integral cross sections as well as the J dependence of partial cross sections exhibit a significant alignment effect in favor of collisions with the HD+ rotational angular momentum vector perpendicular to the Jacobi R coordinate. This effect is most pronounced for the proton-transfer channel at low vibrational and translational energies.
C1 Univ Calif Davis, Dept Chem, Davis, CA 95616 USA.
USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA.
Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China.
RP Tang, XN (reprint author), Univ Calif Davis, Dept Chem, 1 Shields Ave, Davis, CA 95616 USA.
EM cyng@chem.ucdavis.edu; afrl.rvb.pa@hanscom.af.mil; klhan@dicp.ac.cn
RI Chu, Tianshu/B-8782-2011; Han, Keli/M-4569-2015;
OI Han, Keli/0000-0001-9239-1827; LAU, Kai Chung /0000-0003-2125-6841
NR 50
TC 12
Z9 13
U1 2
U2 9
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 OCT 28
PY 2007
VL 127
IS 16
AR 164318
DI 10.1063/1.2800009
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 226LA
UT WOS:000250589400039
PM 17979349
ER
PT J
AU Kay, J
Miller, R
Lucio, L
Morales, E
Smith, SW
Hickman, JR
Kendall, B
Barnicott, PR
AF Kay, Joel, Jr.
Miller, Rosalyn
Lucio, Larry
Morales, Elizabeth
Smith, Steven W.
Hickman, John R.
Kendall, Brian
Barnicott, Paul R.
TI Impact of consolidation of gynecologic cytology: The US air force
experience
SO CANCER CYTOPATHOLOGY
LA English
DT Meeting Abstract
C1 [Kay, Joel, Jr.; Miller, Rosalyn; Lucio, Larry; Morales, Elizabeth; Smith, Steven W.; Hickman, John R.; Kendall, Brian; Barnicott, Paul R.] Wilford Hall USAF Med Ctr, Lackland AFB, TX USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0008-543X
J9 CANCER CYTOPATHOL
JI Cancer Cytopathol.
PD OCT 25
PY 2007
VL 111
IS 5
SU S
MA 38
BP 377
EP 377
PG 1
WC Oncology; Pathology
SC Oncology; Pathology
GA 222YV
UT WOS:000250335700053
ER
PT J
AU Jameson, D
Dierking, M
Duncan, B
AF Jameson, Douglas
Dierking, Matthew
Duncan, Bradley
TI Effects of spatial modes on ladar vibration signature estimation
SO APPLIED OPTICS
LA English
DT Article
AB Ladar-based vibrometry has been shown to be a powerful technique in enabling the plant identification of machines. Rather than sensing the geometric shape of a target laser vibrometers sense motions of the target induced by moving parts within the system. Since the target need not be spatially resolved, vibration can be sensed reliably and provide positive identification at ranges beyond the imaging limits of the aperture. However, as the range of observation increases, the diffraction-limited beam size on the target increases as well, and may encompass multiple vibrational modes on the target's surface. As a result, vibration estimates formed from large laser footprints illuminating multiple modes on a vibrating target will experience a degradation. This degradation is manifest as a spatial low-pass filtering effect: high-order mode shapes, associated with high-frequency vibrations, will be averaged out while low-frequency vibrations will be affected less. A model to predict this phenomenology is proposed for both pulse-pair and cw vibrometry systems. The cw model is compared to results obtained using an off-thes-helf laser vibrometry system. (c) 2007 Optical Society of America
C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
Univ Dayton, Eletro Opt Program, Dayton, OH 45469 USA.
RP Jameson, D (reprint author), USAF, Res Lab, 3109 Hobson Way St, Wright Patterson AFB, OH 45433 USA.
EM Douglas.Jameson@wpafb.af.mil; Matthew.Dierking@wpafb.af.mil;
Bradley.Duncan@notes.udayton.edu
NR 11
TC 4
Z9 4
U1 0
U2 2
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 OCT 20
PY 2007
VL 46
IS 30
BP 7365
EP 7373
DI 10.1364/AO.46.007365
PG 9
WC Optics
SC Optics
GA 232VC
UT WOS:000251047200003
PM 17952170
ER
PT J
AU Sherer, SE
Visbal, AR
AF Sherer, S. E.
Visbal, A. R.
TI Multi-resolution implicit large eddy simulations using a high-order
overset-grid approach
SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
LA English
DT Article
ID TURBULENT CHANNEL FLOW; FINITE-DIFFERENCE SCHEMES; NAVIER-STOKES
EQUATIONS; REYNOLDS-NUMBER; B-SPLINE; RESOLUTION; ALGORITHM
AB A parallel, high-order, overset-grid method is validated for use in large eddy simulation (LES) through its application to fundamental turbulent flow problems. The current method employs a high-order, compact finite-difference approach to evaluate spatial derivatives, with up to tenth-order low-pass filters used to remove high-frequency spurious wave content. These filters have also been found to be effective in modelling the dissipation that occurs at the unresolved scales in the flow for LES simulations. Temporal integration is based on an implicit, approximately factored and diagonalized, second-order algorithm, which reduces the time-step constraints present in explicit time-marching methods for wall-bounded viscous flows. Parallelization, geometric complexity, and local grid refinement are all addressed through the use of an overset-grid approach, with grid communication provided by high-order Lagrangian interpolation. The problems investigated in this work include fully turbulent channel flow at Re-tau = 590 and 1017, and the transitional wake generated by flow over a single circular cylinder at Re-D = 3900. The results obtained with the current approach are validated against well-resolved benchmark calculations or experiments and the impact of the order-of-accuracy of the interpolation method is investigated. The benefits obtained by using the general overset-grid technique to reduce grid point requirements compared to single-grid simulations are also examined. It is shown that for the problems considered in this work, substantial grid-point savings may be obtained with an overset-grid approach compared to a single-grid approach, and that the use of high-order interpolation at overset boundaries is important in maintaining overall solution accuracy. Published in 2007 by John Wiley & Sons, Ltd.
C1 USAF, Res Lab, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA.
RP Sherer, SE (reprint author), Rm 225 Bldg 146,2210 8th St, Wright Patterson AFB, OH 45433 USA.
EM scott.sherer@wpafb.af.mil
NR 35
TC 7
Z9 7
U1 0
U2 2
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0271-2091
J9 INT J NUMER METH FL
JI Int. J. Numer. Methods Fluids
PD OCT 20
PY 2007
VL 55
IS 5
BP 455
EP 482
DI 10.1002/fld.1463
PG 28
WC Computer Science, Interdisciplinary Applications; Mathematics,
Interdisciplinary Applications; Mechanics; Physics, Fluids & Plasmas
SC Computer Science; Mathematics; Mechanics; Physics
GA 217PO
UT WOS:000249960000003
ER
PT J
AU Hrozhyk, UA
Serak, SV
Tabiryan, NV
Bunning, TJ
AF Hrozhyk, Uladzimir A.
Serak, Svetlana V.
Tabiryan, Nelson V.
Bunning, Timothy J.
TI Photoinduced isotropic state of cholesteric liquid crystals: Novel
dynamic photonic materials
SO ADVANCED MATERIALS
LA English
DT Article
ID COLOR; AZOBENZENE; PITCH; CHIRALITY; MIXTURES; LIGHT
AB The photoinduced isotropic (PHI) state of cholesteric liquid crystals (CLCs) induced by the UV irradiation of a highly doped (azobenzene liquid crystal) CLC can be stable for tens of hours dominated by the lifetime of the cis isomers. Low-power laser light can be used to write complex 2D images (a car is shown), where the contrast arises from restoration of the reflective cholesteric phase.
C1 Beam Engn Adv Measurements Co, Winter Pk, FL 32789 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Hrozhyk, UA (reprint author), Beam Engn Adv Measurements Co, 809 S Orlando Ave,Suite 1, Winter Pk, FL 32789 USA.
EM nelson@beamco.com
NR 21
TC 64
Z9 65
U1 2
U2 22
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0935-9648
J9 ADV MATER
JI Adv. Mater.
PD OCT 19
PY 2007
VL 19
IS 20
BP 3244
EP +
DI 10.1002/adma.200700209
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 228NC
UT WOS:000250735600024
ER
PT J
AU Bai, ZW
Houtz, MD
Mirau, PA
Dang, TD
AF Bai, Zongwu
Houtz, Marlene D.
Mirau, Peter A.
Dang, Thuy D.
TI Structures and properties of highly sulfonated
poly(arylenethioethersulfone)s as proton exchange membranes
SO POLYMER
LA English
DT Article
DE proton exchange membrane (PEM); thermal stability; dimensional stability
ID FUEL-CELLS; POLYARYLENETHIOETHER SULFONES; POLYMER ELECTROLYTE;
TRANSPORT; CONDUCTIVITY; IONOMER
AB A series of sulfonated poly(sulfonium cation) polymers, sulfonated poly(arylenethioettiersulfone)s (SPTES)s possess up to two sulfonate groups per repeat unit, and can be easily converted into corresponding acid form of the SPTES polymer to form a tough, ductile, free-standing, pinhole-free membranes with excellent mechanical properties. The SPTES polymers exhibit good water affinity and excellent proton conductivity due to the high water uptake. Proton conductivities between 100 and 300 mS/cm (at 65 degrees C, 85% relative humidity) were observed for the SPTES polymers with 50 mol% (SPTES-50) to 100 mol% (SPTES-100) of sulfonated monomer. The evaluation by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC, dynamic mechanical analysis (DMA), and thermomechanical analysis (TMA) showed that the SPTES polymers have excellent thermal stability, mechanical properties, and dimensional stability, making them excellent candidates for the next generation of proton exchange membranes (PEMs) in fuel cell applications. Published by Elsevier Ltd.
C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA.
Wright Patterson Air Force Base, AFRL, MLBP, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Dang, TD (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
EM thuy.dang@wpafb.af.mil
NR 14
TC 32
Z9 33
U1 1
U2 12
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0032-3861
J9 POLYMER
JI Polymer
PD OCT 19
PY 2007
VL 48
IS 22
BP 6598
EP 6604
DI 10.1016/j.polymer.2007.08.052
PG 7
WC Polymer Science
SC Polymer Science
GA 230TU
UT WOS:000250899600014
ER
PT J
AU Shell, MSL
Calabria, CW
AF Shell, Mark S. La
Calabria, Christopher W.
TI Dexamethasone for bronchiolitis
SO NEW ENGLAND JOURNAL OF MEDICINE
LA English
DT Letter
ID RHINOVIRUS INFECTION
C1 Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
RP Shell, MSL (reprint author), Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
EM mark.lashell@lackland.af.mil
NR 4
TC 0
Z9 0
U1 0
U2 0
PU MASSACHUSETTS MEDICAL SOC
PI WALTHAM
PA WALTHAM WOODS CENTER, 860 WINTER ST,, WALTHAM, MA 02451-1413 USA
SN 0028-4793
J9 NEW ENGL J MED
JI N. Engl. J. Med.
PD OCT 18
PY 2007
VL 357
IS 16
BP 1659
EP 1659
PG 1
WC Medicine, General & Internal
SC General & Internal Medicine
GA 221AY
UT WOS:000250200500015
ER
PT J
AU Luckarift, HR
Ku, BS
Dordick, JS
Spain, JC
AF Luckarift, Heather R.
Ku, Bosung S.
Dordick, Jonathan S.
Spain, Jim C.
TI Silica-immobilized enzymes for multi-step synthesis in microfluidic
devices
SO BIOTECHNOLOGY AND BIOENGINEERING
LA English
DT Article
DE microfluidics; immobilized enzyme; amino-phenoxazinone; chips;
sequential catalysis
ID PHENOXAZINONE SYNTHASE; REACTORS; CHIP; POLYMERIZATION; HYDROXYLATION;
PEROXIDASE; CHEMISTRY; MECHANISM; MICROCHIP; OXIDATION
AB The combinatorial synthesis of 2-aminophenoxazin-3-one (APO) in a microfluidic device is reported. Individual microfluidic chips containing metallic zinc, silica-immobilized hydroxylaminobenzene mutase and silica-immobilized soybean peroxidase are connected in series to create a chemo-enzymatic system for synthesis. Zinc catalyzes the initial reduction of nitrobenzene to hydroxylaminobenzene which undergoes a biocatalytic conversion to 2-aminophenol, followed by enzymatic polymerization to APO. Silica-immobilization of enzymes allows the rapid stabilization and integration of the biocatalyst within a microfluidic device with minimal preparation. The system proved suitable for synthesis of a complex natural product (APO) from a simple substrate (nitrobenzene) under continuous flow conditions.
C1 Rensselaer Polytech Inst, Dept Chem & Biol Engn, Troy, NY 12180 USA.
USAF, Res Lab, Tyndall AFB, FL 32403 USA.
Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA.
RP Spain, JC (reprint author), Rensselaer Polytech Inst, Dept Chem & Biol Engn, Troy, NY 12180 USA.
EM jspain@ce.gatech.edu
FU NIGMS NIH HHS [GM66712]
NR 36
TC 44
Z9 47
U1 0
U2 32
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0006-3592
J9 BIOTECHNOL BIOENG
JI Biotechnol. Bioeng.
PD OCT 15
PY 2007
VL 98
IS 3
BP 701
EP 705
DI 10.1002/bit.21447
PG 5
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 214ZB
UT WOS:000249775800019
PM 17415802
ER
PT J
AU Slagle, JE
Cooper, TM
Krein, DM
Rogers, JE
McLean, DG
Urbas, AM
AF Slagle, Jonathan E.
Cooper, Thomas M.
Krein, Douglas M.
Rogers, Joy E.
McLean, Daniel G.
Urbas, Augustine M.
TI Triplet excimer formation in a platinum acetylide
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID COMPLEXES; OLIGOMERS; SERIES; POLYMERS; EXCITON; SINGLET; STATE
AB To prove the source of self-quenching in trans-Pt(P(C8H17)(3))(2)(C CC6H4C CC6H5)(2) is a result of triplet excimer formation, we carried out nanosecond transient absorption measurements on multiple concentrations. By examining the kinetics we were able to determine rate constants for the formation and decay of the triplet excimer, 4.7 x 10(6) M-1 s(-1) and 6.9 x 10(5) s-(1,) respectively. We determined the transient absorption spectrum for the excimer which has an extinction coefficient maximum per excimer unit of 95 680 M-1 cm(-1) at 600 nm. Experimental analysis suggests that the formation of the triplet excimer is largely due to ligand-ligand interactions. (c) 2007 Elsevier B.V. All rights reserved.
C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
AT & T Govt Solut, Dayton, OH 45324 USA.
Gen Dynam Informat Technol, Dayton, OH 45431 USA.
Universal Energy Syst Inc, Dayton, OH 45432 USA.
Sci Applicat Int Corp, Dayton, OH 45432 USA.
RP Slagle, JE (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Bldg 651,3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Jonathan.Slagle@wpafb.af.mil
NR 16
TC 14
Z9 14
U1 2
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD OCT 15
PY 2007
VL 447
IS 1-3
BP 65
EP 68
DI 10.1016/j.cplett.2007.09.005
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 228DR
UT WOS:000250708000013
ER
PT J
AU Ignatov, AY
Losovyj, YB
Carlson, L
LaGraffe, D
Brand, JI
Dowben, PA
AF Ignatov, A. Yu.
Losovyj, Ya. B.
Carlson, L.
LaGraffe, D.
Brand, J. I.
Dowben, P. A.
TI Pairwise cobalt doping of boron carbides with cobaltocene
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID BETA-RHOMBOHEDRAL BORON; X-RAY-ABSORPTION; CHEMICAL-VAPOR-DEPOSITION;
RICH NEUTRON DETECTORS; THIN-FILMS; ELECTRONIC-STRUCTURE;
PHOTOELECTRON-SPECTROSCOPY; MOLECULAR FILMS; NICKEL; SEMICONDUCTORS
AB We have performed Co K-edge x-ray absorption fine structure and x-ray absorption near edge structure measurements of Co-doped plasma enhanced chemical vapor phase deposition (PECVD) grown "C2B10Hx" semiconducting boron carbides, using cobaltocene. Cobalt does not dope PECVD grown boron carbides as a random fragment of the cobaltocene source gas. The Co atoms are fivefold boron coordinated (R=2.10 +/- 0.02 angstrom) and are chemically bonded to the icosahedral cages of B10CHx or B9C2Hy. Pairwise Co doping occurs, with the cobalt atoms favoring sites some 5.28 +/- 0.02 angstrom apart. (C) 2007 American Institute of Physics.
C1 Louisiana State Univ, Ctr Adv Microstruct & Dev, Baton Rouge, LA 70806 USA.
Air Force Inst Technol, Wright Patterson Air Force Base, Wright Patterson AFB, OH 45433 USA.
Univ Nebraska, Coll Engn & Technol, Walter Scott Engn Ctr, Lincoln, NE 68588 USA.
Univ Nebraska, Dept Phys & Astron, Behlen Lab Phys, Lincoln, NE 68588 USA.
Univ Nebraska, Nebraska Ctr Mat & Nanosci, Behlen Lab Phys, Lincoln, NE 68588 USA.
RP Dowben, PA (reprint author), Louisiana State Univ, Ctr Adv Microstruct & Dev, 6980 Jefferson Highway, Baton Rouge, LA 70806 USA.
EM pdowben@unl.edu
NR 43
TC 7
Z9 7
U1 0
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD OCT 15
PY 2007
VL 102
IS 8
AR 083520
DI 10.1063/1.2799053
PG 6
WC Physics, Applied
SC Physics
GA 226KZ
UT WOS:000250589300037
ER
PT J
AU Yoonessi, M
Bai, ZW
Dang, TD
AF Yoonessi, Mitra
Bai, Zongwu
Dang, Thuy D.
TI Nanostructure and properties of sulfonated polyarylenethioethersulfone
copolymers as proton exchange fuel cell membranes
SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
LA English
DT Article
DE AFM; membrane morphology; polymer electrolyte fuel cell membrane; X-ray
scattering
ID PERFLUORINATED IONOMER MEMBRANES; X-RAY-SCATTERING; POLYMER ELECTROLYTE;
NAFION; CONDUCTIVITY; SWOLLEN; TRANSPORT; FILMS
AB A systematic investigation of properties and nanostructure of sulfonated polyarylenethioethersulfone (SPTES) copolymer proton exchange membranes for fuel cell applications has been presented. SPTES copolymers are high temperature resistant (250 degrees C) and form tough films with excellent proton conductivity up to 170 5 mS/cm (SPTES 70 @ 85 degrees C, 85%RH). Small angle X-ray scattering of hydrated SPTES 70 revealed the presence of local water domains (diameter similar to 5 nm) within the copolymer. The high proton conductivity of the membranes is attributed to the formation of these ionic aggregates containing water molecules, which facilitate proton transfer. AFM studies of SPTES 70 as a function of humidity (25-65%RH) showed an increase in hydrophilic domains with increasing humidity at 22 degrees C. (c) 2007 Wiley Periodicals, Inc.
C1 Univ New Hampshire, Dept Chem Engn, Durham, NH 03824 USA.
Univ Dayton, Res Inst, Dayton, OH 45469 USA.
Air Force Labs, Wright Lab, Wright Patterson AFB, OH 45433 USA.
RP Yoonessi, M (reprint author), Univ New Hampshire, Dept Chem Engn, Durham, NH 03824 USA.
EM mitra.yoonessi@gmail.com
NR 47
TC 5
Z9 5
U1 0
U2 4
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0887-6266
J9 J POLYM SCI POL PHYS
JI J. Polym. Sci. Pt. B-Polym. Phys.
PD OCT 15
PY 2007
VL 45
IS 20
BP 2813
EP 2822
DI 10.1002/polb.21279
PG 10
WC Polymer Science
SC Polymer Science
GA 221PU
UT WOS:000250240600001
ER
PT J
AU DeJoseph, CA
Demidov, VI
Blessington, J
Koepke, ME
AF DeJoseph, C. A., Jr.
Demidov, V. I.
Blessington, J.
Koepke, M. E.
TI Investigation of a radio-frequency inductive-coupled-plasma discharge
afterglow in noble gases
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article
ID ICP DISCHARGE
AB It has been shown (Demidov et al 2005 Phys. Rev. Lett. 95 215002) that even a small number of nonlocal fast electrons, which do not significantly affect the overall mean electron energy, can dramatically change both the plasma and near-wall sheath properties. In this work, Langmuir probe measurements of the electron energy distribution function (EEDF) show the presence of fast electrons created due to collisions of pairs of metastable atoms and collisions of the second kind between metastable atoms and bulk electrons. These measurements were made in the afterglow of a 100% modulated radio-frequency inductive-coupled-plasma discharge in argon, neon and helium. It is shown that this fast component of the EEDF can be controlled independently of the slow electrons, which is a direct consequence of the EEDF nonlocality. Both EEDF and plasma emission spectroscopy measurements are presented for the helium afterglow. These data allow us to determine the absolute density of metastable atoms and their temporal decay during the afterglow. It is shown that under the experimental conditions, stepwise excitation of helium metastable atoms is the primary process for populating excited states and, therefore, decay of the excited atoms is governed by the decay of metastable states. The presence of a trace amount of nitrogen in the system, which does not significantly change the properties of the helium discharge, allowed us to independently measure the decay of helium metastables by monitoring the N-2(+) (B-X) emission resulting from Penning ionization of N-2(X) and confirmed the above conclusions regarding the presence and importance of metastable atoms.
C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA.
RP DeJoseph, CA (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM Charles.DeJoseph@wpafb.af.mil
RI Demidov, Vladimir/A-4247-2013
OI Demidov, Vladimir/0000-0002-2672-7684
NR 21
TC 5
Z9 5
U1 1
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-4075
EI 1361-6455
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD OCT 14
PY 2007
VL 40
IS 19
BP 3823
EP 3833
DI 10.1088/0953-4075/40/19/003
PG 11
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 216FZ
UT WOS:000249865200003
ER
PT J
AU Ober, DM
Wilson, GR
Burke, WJ
Maynard, NC
Siebert, KD
AF Ober, D. M.
Wilson, G. R.
Burke, W. J.
Maynard, N. C.
Siebert, K. D.
TI Magnetohydrodynamic simulations of transient transpolar potential
responses to solar wind density changes
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID MAGNETOSPHERE-IONOSPHERE SYSTEM; INTERPLANETARY MAGNETIC-FIELD;
HIGH-LATITUDE IONOSPHERE; DYNAMIC PRESSURE; JANUARY 10; ELECTRIC
POTENTIALS; HILL MODEL; BOW SHOCK; RECONNECTION; MAGNETOPAUSE
AB Magnetohydrodynamic (MHD) simulations are used to examine the response of the transpolar potential (Phi(TP)) to changes in the solar wind density during periods of constant solar wind electric field. For increases ( decreases) in the solar wind density Phi(TP) responds immediately by increasing ( decreasing) from the steady state values. In both cases the response of Phi(TP) is transient, decaying to near initial steady state values even when the density change persists. The magnitude of the Phi(TP) response is proportional to both the rate of erosion of the dayside magnetopause and the ionospheric Pedersen conductance. In our MHD simulations Phi(TP) is driven entirely by the dayside merging rate and is insensitive to changes in the nightside reconnection rate. The observed relationship between the modeled dayside merging rate and Phi(TP) is well characterized by an L-R circuit equation derived from integrating Faraday's Law around the Region 1 current loop. The inductive time constant for variations in the transpolar potential was found to be 6.5 ( 13) minutes for simulations using ionospheric Pedersen conductances of 6 ( 12) mhos. This corresponds in both cases to a magnetosphere-ionosphere inductance of 65 Henries. Observations of the transpolar potential derived using the assimilative mapping of ionospheric electrodynamics (AMIE) model are presented and shown to be consistent with the simulation results.
C1 USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA.
Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA.
Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA.
Sparta, Nashua, NH USA.
Univ Alabama, CSPAR, Huntsville, AL 35899 USA.
RP Ober, DM (reprint author), USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA.
EM daniel.ober@hanscom.af.mil
NR 40
TC 7
Z9 7
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD OCT 12
PY 2007
VL 112
IS A10
AR A10212
DI 10.1029/2006JA012169
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 221IU
UT WOS:000250221400002
ER
PT J
AU Pedersen, T
Mishin, E
Oksavik, K
AF Pedersen, T.
Mishin, E.
Oksavik, K.
TI Observations of structured optical emissions and particle precipitation
equatorward of the traditional auroral oval
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID DETACHED ARCS; ELECTRIC-FIELD; TROUGH REGION; ART.; PLASMASPHERE;
PATCHES; MAGNETOSPHERE; PLASMAPAUSE; CONVECTION; DENSITY
AB High-sensitivity all-sky images from south-central Alaska show the common occurrence of slow-moving, faint optical emissions at 557.7 and 427.8 nm well equatorward of the discrete aurora. These emissions appear over a continuum of forms ranging from homogenous longitudinal bands to bands with irregular structure on their poleward edge to widely distributed arrays of vortex-like curls and widely spaced spots on the order of 10 km in diameter. These forms appear to correspond to various stages in the temporal evolution of nearly corotating precipitation regions populated by particles injected from more distant areas of the magnetosphere and may exhibit morphological control by an instability operating on cold plasma near the plasmapause. Although these phenomena are most common in the evening hours and typically persist for hours at a time, one case demonstrates that the features can remain throughout the night on occasion. These faint optical features appear to be colocated with regions of enhanced background counts in DMSP particle measurements and to be associated with the ring current/outer radiation belt region equatorward of subauroral polarization streams ( SAPS). The features can occur in conjunction with HF and MF radio frequency absorption, at levels which are often too low to show up on routine absorption instruments such as the riometer. This has practical implications on the operation and interpretation of ionospheric interaction experiments carried out in the subauroral region.
C1 USAF, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA.
Boston Coll, Inst Sci Res, Chestnut Hill, MA 02467 USA.
Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA.
RP Pedersen, T (reprint author), USAF, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA.
EM todd.pedersen@hanscom.af.mil; evgenii.mishin@hanscom.af.mil;
kjellmar.oksavik@jhuapl.edu
OI Oksavik, Kjellmar/0000-0003-4312-6992
NR 41
TC 7
Z9 7
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD OCT 12
PY 2007
VL 112
IS A10
AR A10208
DI 10.1029/2007JA012299
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 221IU
UT WOS:000250221400004
ER
PT J
AU Li, LX
Marolla, TV
Nadeau, LJ
Spain, JC
AF Li, Lixiong
Marolla, Theodore V.
Nadeau, Lloyd J.
Spain, Jim C.
TI Probing the role of promoters in zinc reduction of nitrobenzene:
Continuous production of hydroxylaminobenzene
SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
LA English
DT Article; Proceedings Paper
CT 1st Mediterranean Congress on Chemical Engineering for the Environment
CY OCT, 2006
CL Venice, ITALY
SP Grp Univ Researchers Chem Engn Italy, Italian Assoc Chem Engineers
ID ZERO-VALENT IRON; AROMATIC NITRO-COMPOUNDS; AMMONIUM FORMATE;
CHEMOSELECTIVE REDUCTION; NITROAROMATIC COMPOUNDS; OXIDATION; WATER;
METAL
AB Production of hydroxylaminobenzene (HAB) via zinc reduction of nitrobenzene (NB) is an established batch process based on aqueous electrolytic reactions involving an electrolyte as the promoter. This experimental study explored continuous production of HAB that is needed as an intermediate in a novel zinc/biocatalyst processing train, recently demonstrated by Luckarift et al. to obtain aminophenols. Experiments were conducted using a Zn packed bed to probe the role of promoters under continuous-flow conditions at a temperature of 60 degrees C and promoter/NB molar ratios of 0.75, 1.15, and 1.5. In addition to the conventional NH4Cl, ammonium formate and acetate were used as promoters. The best HAB yield was 95%, as compared to the batch yield of 68%. The formation of oxidized zinc species caused the packed bed to build back pressure, which appeared to enhance the selectivity of HAB/aniline. The formation of NB and ammonium/zinc complexes, as supported by voltammetric evidence, appears to be one of the key roles of promoters. These findings demonstrated efficacy and advantages of the continuous HAB production process.
C1 Appl Res Associates Inc, Panama City, FL 32401 USA.
USAF, Res Lab, Tyndall AFB, FL 32403 USA.
Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA.
RP Li, LX (reprint author), Appl Res Associates Inc, 430 W 5th St,Suite 700, Panama City, FL 32401 USA.
EM lli@ara.com
NR 20
TC 1
Z9 3
U1 0
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0888-5885
J9 IND ENG CHEM RES
JI Ind. Eng. Chem. Res.
PD OCT 10
PY 2007
VL 46
IS 21
BP 6840
EP 6846
DI 10.1021/ie061531k
PG 7
WC Engineering, Chemical
SC Engineering
GA 218AC
UT WOS:000249987400031
ER
PT J
AU Howell, DL
Ward, KC
Austin, HD
Young, JL
Woods, WG
AF Howell, Della L.
Ward, Kevin C.
Austin, Harland D.
Young, John L.
Woods, William G.
TI Access to pediatric cancer care by age, race, and diagnosis, and
outcomes of cancer treatment in pediatric and adolescent patients in the
state of Georgia
SO JOURNAL OF CLINICAL ONCOLOGY
LA English
DT Article; Proceedings Paper
CT 18th Annual Meeting of the
American-Society-of-Pediatric-Hematology-Oncology
CY MAY 13-17, 2005
CL Washington, DC
SP Amer Soc Pediat Hematol Oncol
ID ACUTE LYMPHOBLASTIC-LEUKEMIA; ACUTE MYELOID-LEUKEMIA; CHILDHOOD-CANCER;
CLINICAL-TRIALS; ONCOLOGY-GROUP; SURVIVAL; CHILDREN; RHABDOMYOSARCOMA;
ADULTS; PLACE
AB Purpose There have been concerns among pediatric oncologists that adolescent and minority patients are not getting adequate access to care. This study examines access to cancer care and survival outcomes based on age, race, and type of cancer in patients in Georgia.
Patients and Methods We performed a retrospective review of 1,751 cancer patients aged 0 to 19 years, diagnosed between 1998 and 2002, in the Georgia Comprehensive Cancer Registry, which identified patients who were treated at one of five Georgia pediatric cancer centers (Children's Oncology Group [COG] members) at any point in their treatment. Data were further analyzed for age at diagnosis, race, county of residence, and 5-year survival.
Results Eighty-seven percent of patients aged 0 to 14 years and 36% of those aged 15 to 19 years were treated at a COG institution. Twenty-five percent of all patients were of African descent, with 75.4% of black versus 70.3% of white patients (age 0 to 19 years) treated at a COG institution (P < .01); 97.1% of other minorities were treated at a COG institution (P < .05). The 5-year actuarial survival rates for more pediatric-specific cancers were significantly lower in all leukemias (75.1% v 46.4%; P = .0015), and acute lymphoblastic leukemia specifically (86.3% v 53.3%; P < .05) for patients not treated at a COG institution. Actuarial survival rates were much lower for blacks than whites in all cancers as a whole (70% v 82%; P < .001) and for many specific subtypes.
Conclusion Adolescent-aged patients are less likely to be referred to a COG institution, potentially exposing them to worse outcomes in some cancer subtypes. Reassuringly, minority populations are receiving adequate access to pediatric cancer care; unfortunately their survival rates are lower.
C1 Emory Univ, Dept Epidemiol, Atlanta, GA 30322 USA.
Childrens Healthcare Atlanta, Aflac Canc Ctr, Atlanta, GA USA.
Childrens Healthcare Atlanta, Blood Disordere Serv, Atlanta, GA USA.
Georgia Ctr Canc Stat, Atlanta, GA USA.
RP Howell, DL (reprint author), 2200 Bergquist Dr,Suite 1A,MMNP, Lackland AFB, TX 78236 USA.
EM Della.Howell@lackland.af.mil
NR 23
TC 48
Z9 49
U1 0
U2 3
PU AMER SOC CLINICAL ONCOLOGY
PI ALEXANDRIA
PA 330 JOHN CARLYLE ST, STE 300, ALEXANDRIA, VA 22314 USA
SN 0732-183X
J9 J CLIN ONCOL
JI J. Clin. Oncol.
PD OCT 10
PY 2007
VL 25
IS 29
BP 4610
EP 4615
DI 10.1200/JCO.2006.07.6992
PG 6
WC Oncology
SC Oncology
GA 233EQ
UT WOS:000251073600019
PM 17925556
ER
PT J
AU Smetana, AB
Wang, JS
Boeckl, J
Brown, GJ
Wai, CM
AF Smetana, Alexander B.
Wang, Joanna Shaofen
Boeckl, John
Brown, Gail J.
Wai, Chien M.
TI Fine-tuning size of gold nanoparticles by cooling during reverse micelle
synthesis
SO LANGMUIR
LA English
DT Article
ID SILVER NANOPARTICLES; AQUEOUS-SOLUTION; MICROEMULSIONS; SUPERLATTICES;
REDUCTION; COBALT; GROWTH; AGENTS; WATER; AOT
AB By lowering the reaction temperature during metal ion reduction in a reverse micelle system, gold nanoparticle size can be subtly tuned from 6.6 to 2.2 nm in diameter. Under these reaction conditions, the water-to-surfactant ratio (W value) also plays an important role in controlling the particle size, enabling a wide range of products obtainable via a simple, quick, reproducible synthesis. Particle sizes were measured by HRTEM, and size trends were supported by UV-vis spectroscopy.
C1 Univ Idaho, Dept Chem, Moscow, ID 83843 USA.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Wai, CM (reprint author), Univ Idaho, Dept Chem, Moscow, ID 83843 USA.
EM cwai@uidaho.edu
NR 26
TC 45
Z9 45
U1 1
U2 17
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD OCT 9
PY 2007
VL 23
IS 21
BP 10429
EP 10432
DI 10.1021/la701229q
PG 4
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 217LF
UT WOS:000249948700001
PM 17854207
ER
PT J
AU Parthasarathy, TA
Rapp, RA
Opeka, M
KeranS, RJ
AF Parthasarathy, T. A.
Rapp, R. A.
Opeka, M.
Kerans, R. J.
TI A model for the oxidation of ZrB2, HfB2 and TiB2
SO ACTA MATERIALIA
LA English
DT Article
DE model; oxidation; ZrB2; HfB2; TiB2
ID HIGH TEMPERATURE CERAMICS; SOLID ELECTROLYTES; MIXED CONDUCTION;
ZIRCONIUM; PROTECTION; DIBORIDES; HAFNIUM
AB A mechanistic model that interprets the oxidation behavior of the diborides of Zr, Hf and Ti in the temperature range of similar to 1000-1800 degrees C was formulated. Available thermodynamic data and literature data for vapor pressures and diffusivities were used to evaluate the model. Good correspondence was obtained between theory and experiments for weight gain, recession and scale thickness as functions of temperature and oxygen partial pressure. At temperatures below about 1400 degrees C, the rate-limiting step is the diffusion of dissolved oxygen through a film of liquid boria in capillaries at the base of the oxidation product. At higher temperatures, the boria is lost by evaporation, and the oxidation rate is limited by Knudsen diffusion of molecular oxygen through the capillaries between nearly columnar blocks of the oxide, MO2. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 UES Inc, Dayton, OH 45432 USA.
Ohio State Univ, Columbus, OH 43210 USA.
Naval Surface Warfare Ctr, Carderock Div, Bethesda, MD USA.
USAF, Res Lab, Mat & Mfg Directorate, AFRL MLLN, Wright Patterson AFB, OH 45433 USA.
RP Parthasarathy, TA (reprint author), UES Inc, Dayton, OH 45432 USA.
EM Triplicane.parthasarathy@wpafb.af.mil
RI Parthasarathy, Triplicane/B-7146-2011
OI Parthasarathy, Triplicane/0000-0002-5449-9754
NR 27
TC 106
Z9 123
U1 7
U2 73
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 OCT
PY 2007
VL 55
IS 17
BP 5999
EP 6010
DI 10.1016/j.actamat.2007.07.027
PG 12
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 223FS
UT WOS:000250355700032
ER
PT J
AU Wang, X
Pan, E
Roy, AK
AF Wang, X.
Pan, E.
Roy, A. K.
TI Scattering of antiplane shear wave by a piezoelectric circular cylinder
with an imperfect interface
SO ACTA MECHANICA
LA English
DT Article
ID 3-DIMENSIONAL GREENS-FUNCTIONS; GENERAL BOUNDARY-CONDITIONS; EFFECTIVE
CONDUCTIVITY; HALF-SPACE; INCLUSION; COMPOSITES; CONTACT
AB We present analytical solutions for the scattering of an antiplane shear wave by a piezoelectric circular cylinder with an imperfect interface. We first consider the simple case in which the imperfection is homogeneous along the interface. Two typical imperfect interfaces are addressed: 1) mechanically compliant and dielectrically weakly conducting interface, and 2) mechanically compliant and dielectrically highly conducting interface. The expressions for the directivity pattern and scattering cross-section of the scattered shear waves are derived. We then investigate the more difficult problem in which the imperfection is circumferentially inhomogeneous along the interface. A concise expression for an inhomogeneously compliant and weakly conducting interface is derived by means of matrix notation. Numerical examples are presented to demonstrate the effect of the imperfection and the circumferential inhomogeneity of the interface on the directivity patterns and scattering cross-sections of the scattered shear wave. The circumferentially inhomogeneous interface is also utilized to model the interface where an arbitrary number of cracks exist. Results show that when every part of the interface is rather compliant, large low-frequency peaks of the scattered cross-sections, which correspond to the resonance scattering, can be observed no matter if the interface is homogeneous or inhomogeneous. The appearance of large low-frequency peaks can be well explained by estimating the natural frequency of the corresponding reduced mass-spring system where the cylinder is assumed as a rigid body. Peaks of the scattered cross-sections spanning from low frequencies to high frequencies can be observed for a cylinder with a partially debonded interface.
C1 Univ Akron, Dept Civil Engn, Akron, OH 44325 USA.
USAF, Res Lab, AFRL, MLBCM, Wright Patterson AFB, OH 45433 USA.
RP Wang, X (reprint author), Univ Akron, Dept Civil Engn, Akron, OH 44325 USA.
EM pan2@uakron.edu
RI Pan, Ernian/F-4504-2011
OI Pan, Ernian/0000-0001-6640-7805
NR 25
TC 22
Z9 24
U1 1
U2 7
PU SPRINGER WIEN
PI WIEN
PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 WIEN, AUSTRIA
SN 0001-5970
J9 ACTA MECH
JI Acta Mech.
PD OCT
PY 2007
VL 193
IS 3-4
BP 177
EP 195
DI 10.1007/s00707-007-0465-5
PG 19
WC Mechanics
SC Mechanics
GA 213PX
UT WOS:000249680700004
ER
PT J
AU Rizzetta, DP
Visbal, MR
AF Rizzetta, Donald P.
Visbal, Miguel R.
TI Numerical investigation of plasma-based flow control for transitional
highly loaded low-pressure turbine
SO AIAA JOURNAL
LA English
DT Article; Proceedings Paper
CT AIAA 45th Aerospace Sciences Meeting and Exhibit
CY JAN 08-11, 2007
CL Reno, NV
SP Amer Inst Aeronaut & Astronaut
ID LARGE-EDDY SIMULATION; VORTEX-GENERATOR JETS; DELTA-WING ROLL;
SEPARATION CONTROL; FLUID-DYNAMICS; BLADES; FLOWFIELDS; ACTUATORS;
SCHEMES; DNS
AB Plasma-based active flow control was simulated numerically for the subsonic flow through a highly loaded lowpressure turbine. The configuration corresponded to previous experiments and computations which considered flow at a Reynolds number of 25,000 based upon axial chord and inlet conditions. In this situation, massive separation occurs on the suction surface of each blade due to uncovered turning. The present exploratory numerical study was performed to investigate the use of asymmetric dielectric-barrier-discharge actuators for mitigating separation, thereby decreasing turbine wake losses and increasing efficiency. Solutions were obtained for the Navier-Stokes equations, which were augmented by a phenomenological model that was used to represent plasma-induced body forces imparted by the actuator on the fluid. The numerical method used a high-fidelity time-implicit scheme, employing domain decomposition to carry out calculations on a parallel computing platform. A high-order overset grid approach preserved spatial accuracy in a locally refined embedded region. The magnitude of the plasmainduced body force required for control is examined, and both continuous and pulse-modulated actuations are considered. Novel use of counterflow actuation is also investigated, and the effects of pulsing frequency and duty cycle are considered. Features of the flowfields are described, and resultant solutions are compared with each other, with previous mass-injection control cases, and with the baseline situation where no control was enforced.
C1 USAF, Res Lab, Computat Sci Branch, Wright Patterson AFB, OH 45433 USA.
RP Rizzetta, DP (reprint author), USAF, Res Lab, Computat Sci Branch, Wright Patterson Air Force Base, Wright Patterson AFB, OH 45433 USA.
NR 60
TC 27
Z9 27
U1 2
U2 8
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
J9 AIAA J
JI AIAA J.
PD OCT
PY 2007
VL 45
IS 10
BP 2554
EP 2564
DI 10.2514/1.29602
PG 11
WC Engineering, Aerospace
SC Engineering
GA 223CJ
UT WOS:000250346900018
ER
PT J
AU Fadare, O
Cardoza-Favarato, G
AF Fadare, Oluwole
Cardoza-Favarato, Gabriella
TI The significance of disease extent in high-grade cervical
intraepithelial neoplasia excised with negative margins by loop
electrosurgical excision procedure
SO AMERICAN JOURNAL OF CLINICAL PATHOLOGY
LA English
DT Meeting Abstract
CT Annual Meeting of the Amerian-Society-for-Clinical-Pathology
CY OCT 18-21, 2007
CL New Orleans, LA
SP Amer Soc Clin Pathol
C1 Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA.
Univ Texas, Hlth Sci Ctr, Dept Pathol, San Antonio, TX 78284 USA.
San Antonio Uniformed Serv Hlth Educ Consortium, Pathol Program, San Antonio, TX USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC CLINICAL PATHOLOGY
PI CHICAGO
PA 2100 W HARRISON ST, CHICAGO, IL 60612 USA
SN 0002-9173
J9 AM J CLIN PATHOL
JI Am. J. Clin. Pathol.
PD OCT
PY 2007
VL 128
IS 4
MA 16
BP 686
EP 686
PG 1
WC Pathology
SC Pathology
GA 212IM
UT WOS:000249589900037
ER
PT J
AU Carlson, L
Lagraffe, D
Balaz, S
Ignatov, A
Losovyj, YB
Choi, J
Dowben, PA
Brand, JI
AF Carlson, L.
Lagraffe, D.
Balaz, S.
Ignatov, A.
Losovyj, Y. B.
Choi, J.
Dowben, P. A.
Brand, J. I.
TI Doping of boron carbides with cobalt, using cobaltocene
SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
LA English
DT Article
ID BETA-RHOMBOHEDRAL BORON; CHEMICAL-VAPOR-DEPOSITION; RICH NEUTRON
DETECTORS; MOLECULAR ICOSAHEDRA; ELECTRONIC-STRUCTURE; THIN-FILMS;
PHOTOELECTRON-SPECTROSCOPY; PYROLYTIC-GRAPHITE; SURFACE; NICKEL
AB The decomposition of cobaltocene under low energy electron irradiation appears facile, and evidence suggests that the decomposition products lead to an increase in the carrier concentration in semiconducting boron carbides. Using cobaltocene to introduce dopants, we fabricated a semiconducting boron carbide homojunction.
C1 Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA.
Univ Nebraska, Nebraska Ctr Mat & Nanosci, Behlen Lab Phys, Lincoln, NE 68588 USA.
USAF, Wright Patterson AFB, OH 45433 USA.
Univ Nebraska, Walter Scott Engn Ctr N245, Coll Engn & Technol, Lincoln, NE 68588 USA.
Louisiana State Univ, Ctr Adv Microstruct & Devices, Baton Rouge, LA 70806 USA.
RP Dowben, PA (reprint author), Univ Nebraska, Dept Phys & Astron, POB 880111, Lincoln, NE 68588 USA.
EM pdowben@unl.edu
RI Balaz, Snjezana/B-7668-2013
OI Balaz, Snjezana/0000-0002-0439-9472
NR 50
TC 17
Z9 17
U1 0
U2 10
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0947-8396
J9 APPL PHYS A-MATER
JI Appl. Phys. A-Mater. Sci. Process.
PD OCT
PY 2007
VL 89
IS 1
BP 195
EP 201
DI 10.1007/s00339-007-4086-6
PG 7
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 201KP
UT WOS:000248830500032
ER
PT J
AU Ziegler, A
Cinibulk, MK
Kisielowski, C
Ritchie, RO
AF Ziegler, A.
Cinibulk, M. K.
Kisielowski, C.
Ritchie, R. O.
TI Atomic-scale observation of the grain-boundary structure of Yb-doped and
heat-treated silicon nitride ceramics
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID TRANSMISSION ELECTRON-MICROSCOPY; INTERGRANULAR FILM THICKNESS;
MICROSTRUCTURAL DESIGN; COMPRESSIVE CREEP; SI3N4-MGO ALLOYS; RESOLUTION;
CHEMISTRY; OXIDATION; STRENGTH; FRACTURE
AB The effect of secondary sintering additives and/or a post-sintering heat treatment on the semicrystalline atomic structure of the intergranular phase in silicon nitride ceramics is investigated. Three different Yb-doped Si(3)N(4) ceramic compositions are examined using a scanning transmission electron microscope, whereby the intergranular atomic structure is directly imaged with Angstrom resolution. The resulting high-resolution images show that the atomic arrangement of the Yb takes very periodic positions along the interface between the intergranular phase and the matrix grains, and that a postsintering 1250 degrees C heat treatment, as well as a change of the secondary sintering additives (Al(2)O(3) vs SiO(2)), does not alter the atomic positions of Yb. This result has implications for the understanding of how the mechanical properties of ceramics are influenced by the presence of the nanoscale intergranular phase, and for associated computational modeling of its precise role and atomic structure.
C1 Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
Wright Patterson AF Base, AF Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Ziegler, A (reprint author), Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
EM roritchie@lbl.gov
RI Ritchie, Robert/A-8066-2008
OI Ritchie, Robert/0000-0002-0501-6998
NR 30
TC 2
Z9 2
U1 1
U2 5
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 OCT 1
PY 2007
VL 91
IS 14
AR 141906
DI 10.1063/1.2789390
PG 3
WC Physics, Applied
SC Physics
GA 217UZ
UT WOS:000249974100031
ER
PT J
AU Coletta, D
AF Coletta, Damon
TI Courage in the service of virtue - The case of General Shinseki's
testimony before the Iraq war
SO ARMED FORCES & SOCIETY
LA English
DT Article
DE civilian control; Iraq crisis; Goldwater-Nichols; joint chiefs of staff
AB Army Chief of Staff Eric Shinseki testified to the Senate Armed Services Committee before Operation Iraqi Freedom that several hundred thousand American Army soldiers were needed to occupy Iraq following a successful completion of the war. In hindsight, after many postwar problems occurred during Army and Marine efforts to stabilize Iraq, General Shinseki's action has been almost universally praised as prescient and courageous. This article counters that, from a civil-military relations perspective, Shinseki's testimony was neither sufficiently accurate nor sufficiently respectful of civilian control to serve as a healthy model for future officers. The U.S. civil-military relationship framed by the 1986 Goldwater-Nichols Act, which preserved the power of individual service chiefs to provide independent testimony, is better served when high-ranking officers adopt a notion of courage in light of military authority delegated to regional combatant commands and in consideration of the political vulnerabilities of their civilian masters.
C1 USAF Acad, Colorado Springs, CO 80840 USA.
RP Coletta, D (reprint author), USAF Acad, 2354 Fairchild Dr,Suite 6L116, Colorado Springs, CO 80840 USA.
EM damon.coletta@usafa.af.mil
NR 3
TC 5
Z9 5
U1 0
U2 1
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0095-327X
J9 ARMED FORCES SOC
JI Armed Forces Soc.
PD OCT
PY 2007
VL 34
IS 1
BP 109
EP 121
DI 10.1177/0095327X07304191
PG 13
WC Political Science; Sociology
SC Government & Law; Sociology
GA 209TX
UT WOS:000249412000006
ER
PT J
AU Westmoreland, D
Krell, RW
Self, BP
AF Westmoreland, David
Krell, Robert W.
Self, Brian P.
TI Physiological responses to the Coriolis illusion: Effects of head
position and vision
SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE
LA English
DT Article
DE coriolis illusion; spatial disorientation; cardiovascular; sympathetic
outflow
ID MOTION SICKNESS; STIMULATION; SIMULATOR; GENDER; FLIGHT; PITCH
AB introduction: Changes in sympathetic outflow during Type 11 spatial disorientation are well documented. in this study we investigated the influences of head position and eye state (open or closed) on sympathetic activation. Methods: There were I I naive subjects (6 men, 5 women) who were tested in a General Aviation Trainer that accelerated at a subthreshold rate for 60 s until a constant angular velocity of 90 degrees center dot s(-1) was reached. Approximately 40 s later, subjects were instructed to tilt their heads along either the pitch or roll axis, stimulating a Coriolis illusion. Subjects reported the perceived intensity and duration of disorientation. Heart rate, heart rate variability, and electrodermal responses were recorded before, during, and after the period of disorientation. Each subject completed four trials, which were crossed combinations of head position and eye state. Results: There were significant increases in heart rate and the electrodermal response during disorientation, but no significant change in heart rate variability. Head position had no significant effect on any physiological parameters or on the perceived intensity of disorientation; subjects reported a shorter duration of disorientation when the head was tilted into the roll versus the pitch axis. Eye state had no effect on heart rate, heart rate variability, or the intensity of disorientation, but the electrodermal response was somewhat greater, and the duration of disorientation shorter when eyes were open. Conclusions: The results suggest that head position and eye state (open or closed) do not need to be included as factors when investigating sympathetic outflow during a mild Coriolis illusion.
C1 USAF Acad, Dept Biol, Colorado Springs, CO 80840 USA.
Univ Virginia, Sch Med, Charlottesville, VA 22908 USA.
Calif Polytech State Univ San Luis Obispo, Dept Engn Mech, San Luis Obispo, CA 93407 USA.
RP Westmoreland, D (reprint author), USAF Acad, Dept Biol, 2355 Fac Dr,Suite 2P389, Colorado Springs, CO 80840 USA.
EM david.westmoreland@usafa.edu
NR 14
TC 1
Z9 1
U1 0
U2 0
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 0095-6562
J9 AVIAT SPACE ENVIR MD
JI Aviat. Space Environ. Med.
PD OCT
PY 2007
VL 78
IS 10
BP 985
EP 989
DI 10.3357/ASEM.2010.2007
PG 5
WC Public, Environmental & Occupational Health; Medicine, General &
Internal; Sport Sciences
SC Public, Environmental & Occupational Health; General & Internal
Medicine; Sport Sciences
GA 215UJ
UT WOS:000249834200012
PM 17955949
ER
PT J
AU Fessler, HE
Derdak, S
Ferguson, ND
Hager, DN
Kacmarek, RM
Thompson, BT
Brower, RG
AF Fessler, Henry E.
Derdak, Stephen
Ferguson, Niall D.
Hager, David N.
Kacmarek, Robert M.
Thompson, B. Taylor
Brower, Roy G.
TI Lessons from pediatric high-frequency oscillatory ventilation may extend
the application in critically ill adults - Reply
SO CRITICAL CARE MEDICINE
LA English
DT Letter
ID INJURY; MODEL
C1 Johns Hopkins Med Inst, Div Pulm & Crit Care Med, Baltimore, MD 21205 USA.
Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
Univ Toronto, Interdepartmental Div Crit Care Med, Toronto, ON, Canada.
Massachusetts Gen Hosp, Dept Resp Care, Boston, MA 02114 USA.
Massachusetts Gen Hosp, Div Pulm & Crit Care Med, Boston, MA 02114 USA.
RP Fessler, HE (reprint author), Johns Hopkins Med Inst, Div Pulm & Crit Care Med, Baltimore, MD 21205 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0090-3493
J9 CRIT CARE MED
JI Crit. Care Med.
PD OCT
PY 2007
VL 35
IS 10
BP 2473
EP 2473
DI 10.1097/01.CCM.0000284749.75867.DB
PG 1
WC Critical Care Medicine
SC General & Internal Medicine
GA 217HH
UT WOS:000249938500069
ER
PT J
AU Vernin, J
Trinquet, H
Jumper, G
Murphy, E
Ratkowski, A
AF Vernin, Jean
Trinquet, Herve
Jumper, George
Murphy, Edmund
Ratkowski, Anthony
TI OHP02 gravity wave campaign in relation to optical turbulence
SO ENVIRONMENTAL FLUID MECHANICS
LA English
DT Article
DE gravity waves; atmospheric optics; atmospheric turbulence effects
AB Herein we present a campaign dedicated to the detection and the characterization of Gravity Waves (GW) in the Earth's atmosphere in relation to the generation of Optical Turbulence (OT). The observations took place in France from 17 to 24 July 2002 at the Haute Provence Observatory (OHP) and simultaneously at the Sirene Observatory, some 20 km apart. From both sites, several balloons were launched that measured the classical PTU-Wind profiles and additionally the structure constant of the temperature field C-T(2) vertical profiles. A Generalized Scidar (GS) technique was implemented at the 1.93 m-diameter OHP telescope, providing C-N(2) (n) profiles every minute. From our observations, a significant amount of GW activity was observed at both sites, but without clear evidence of correlation between the two sites. It seems from our observations that a wide spectrum of GW is present at a given altitude and that this could result in a lack of correlation between observations made from two sites 20 km apart. Most GW are non-stationary with long horizontal wavelengths (lambda similar to 100-200 km), kilometric vertical wavelengths (lambda similar to 0.5-2 km) and long intrinsic period (T similar to 2-15 h). They belong in the category of "hydrostatic rotating or non-rotating waves". Layers of optical turbulence detected by balloons and the Scidar technique correlate well with regions of GW activity.
C1 Univ Nice, LUAN, UMR 6525, F-06108 Nice, France.
US Air Force Res Lab, Bedford, MA 01731 USA.
RP Vernin, J (reprint author), Univ Nice, LUAN, UMR 6525, Parc Valrose, F-06108 Nice, France.
EM vernin@unice.fr
NR 7
TC 8
Z9 8
U1 0
U2 0
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1567-7419
J9 ENVIRON FLUID MECH
JI Environ. Fluid Mech.
PD OCT
PY 2007
VL 7
IS 5
BP 371
EP 382
DI 10.1007/s10652-007-9032-9
PG 12
WC Environmental Sciences; Mechanics; Meteorology & Atmospheric Sciences;
Oceanography; Water Resources
SC Environmental Sciences & Ecology; Mechanics; Meteorology & Atmospheric
Sciences; Oceanography; Water Resources
GA 219VR
UT WOS:000250116800003
ER
PT J
AU Estevadeordal, J
Gogineni, S
Kimmel, RL
Hayes, JR
AF Estevadeordal, Jordi
Gogineni, Sivaram
Kimmel, Roger L.
Hayes, James R.
TI Investigation of low-density hypersonic and plasma flows by schlieren
system using various light sources
SO EXPERIMENTAL THERMAL AND FLUID SCIENCE
LA English
DT Article
DE schlieren; LED; laser; hypersonics; plasma
AB The results of an experimental investigation of low-density hypersonic and plasma flows using a schlieren system with various light sources are reported. In addition to the commonly used Nanopulser, two other pulsed light sources - LED and laser breakdown - are employed. As expected, the Nanopulser furnishes excellent, short-duration illumination pulses although illumination varies from shot-to-shot. Laser breakdown supplies short-duration, incoherent illumination that is constant from pulse-to-pulse. LED systems provide excellent steady illumination with significant advantages such as lower cost, monochromatic light and pulsed- and continuous-mode operation. (c) 2007 Elsevier Inc. All rights reserved.
C1 Innovat Sci Solut Inc, Dayton, OH 45440 USA.
Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Estevadeordal, J (reprint author), Innovat Sci Solut Inc, Dayton, OH 45440 USA.
EM jordie@innssi.com
NR 12
TC 2
Z9 2
U1 1
U2 5
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0894-1777
J9 EXP THERM FLUID SCI
JI Exp. Therm. Fluid Sci.
PD OCT
PY 2007
VL 32
IS 1
BP 98
EP 106
DI 10.1016/j.expthermflusci.2007.02.005
PG 9
WC Thermodynamics; Engineering, Mechanical; Physics, Fluids & Plasmas
SC Thermodynamics; Engineering; Physics
GA 225DU
UT WOS:000250498100011
ER
PT J
AU Van Horne, AK
Bates, GW
Robinson, RD
Arthur, NJ
Propst, AM
AF Van Horne, Anne K.
Bates, G. Wright
Robinson, Randal D.
Arthur, Nancy J.
Propst, Anthony M.
TI Recombinant follicle-stimulating hormone (rFSH) supplemented with
low-dose human chorionic gonadotropin compared with rFSH alone for
ovarian stimulation for in vitro fertilization
SO FERTILITY AND STERILITY
LA English
DT Editorial Material
ID HUMAN LH SUPPLEMENTATION; LUTEINIZING-HORMONE; NORMOGONADOTROPHIC WOMEN;
PROFOUND SUPPRESSION; CYCLES; ANTAGONISTS
AB Low-dose hCG supplementation was administered at the start of ovarian stimulation, concomitantly with recombinant FSH (rFSH) in GnRH antagonist cycles, and these were compared with GnRH-a cycles that used rFSH alone. The low-dose hCG group had similar implantation and pregnancy rates but had significantly reduced rFSH requirements, allowing for an average cost savings of $600 per cycle.
C1 Wilford Hall USAF Med Ctr, San Antonio Uniformed Serv Hlth Educt Consortium, Div Reprod Endocrinol & Infertil, Lackland AFB, TX USA.
RP Propst, AM (reprint author), 2200 Bergquist Dr,MMNO, Lackland AFB, TX 78236 USA.
EM anthony.propst@lackland.af.mil
NR 14
TC 11
Z9 11
U1 0
U2 0
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 OCT
PY 2007
VL 88
IS 4
BP 1010
EP 1013
DI 10.1016/j.fertnstert.2006.12.051
PG 4
WC Obstetrics & Gynecology; Reproductive Biology
SC Obstetrics & Gynecology; Reproductive Biology
GA 220YI
UT WOS:000250192800042
PM 17434503
ER
PT J
AU Welbourne, TM
Cycyota, CS
Ferrante, CJ
AF Welbourne, Theresa M.
Cycyota, Cynthia S.
Ferrante, Claudia J.
TI Wall street reaction to women in IPOs: An examination of gender
diversity in top management teams
SO GROUP & ORGANIZATION MANAGEMENT
LA English
DT Article
DE IPOs; diversity; TMT; market signaling
ID INITIAL PUBLIC OFFERINGS; FIRM PERFORMANCE; PRODUCT INNOVATION;
MODERATING ROLE; POWERFUL WOMEN; BLACK-BOX; DEMOGRAPHY; BUSINESS;
INDUSTRY; HETEROGENEITY
AB The authors examine the effect of having women on the top management teams of initial public offering (IPO) firms on the organizations' short- and long-term financial performance. Looking at three different samples, the authors found that trend data indicated IPO firms were gaining in the number of women they employ in their top management teams. Using data from 534 IPO firms, results suggest one reason why the trend is growing; women appear to have a positive association with the firms' short-term performance (Tobin's Q, which is market price to book value per share), 3-year stock price growth, and growth in earnings per share. Possible reasons for the positive effect of women on performance include better innovation and problem-solving processes in more diverse top management teams and the possibility that, on average, the women on these teams are higher performers than are the men on the same teams.
C1 Univ Michigan, Ross Sch Business, Ann Arbor, MI 48103 USA.
USAF Acad, Dept Management, Colorado Springs, CO USA.
RP Welbourne, TM (reprint author), Univ Michigan, Ross Sch Business, 905 W Eisenhower Circle,Suite 110, Ann Arbor, MI 48103 USA.
EM twelbour@umich.edu
NR 77
TC 23
Z9 26
U1 7
U2 31
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1059-6011
J9 GROUP ORGAN MANAGE
JI Group Organ. Manage.
PD OCT
PY 2007
VL 32
IS 5
BP 524
EP 547
DI 10.1177/1059601106291071
PG 24
WC Psychology, Applied; Management
SC Psychology; Business & Economics
GA 211YQ
UT WOS:000249560600002
ER
PT J
AU Chen, B
O'Dell, DC
Thomsen, SL
Thomas, RJ
Welch, AJ
AF Chen, Bo
O'Dell, Daniel C.
Thomsen, Sharon L.
Thomas, Robert J.
Welch, Ashley J.
TI Effect of pigmentation density upon 2.0 mu m laser irradiation thermal
response
SO HEALTH PHYSICS
LA English
DT Article
DE skin dose; maximum permissible exposures; lasers; health effects
ID SKIN; MELANIN; REGION; DAMAGE
AB Yucatan mini-pigs with predominantly dark skin have been used to determine skin safety standards for infrared (IR) wavelength irradiation due to its anatomical similarity to all human skin. It has generally been argued that water is the principle absorber in the IR-B band and melanin has relatively low absorbance. To accept dark pigmented damage thresholds for skin with various melanin densities, it is necessary to investigate the potential role of melanin in producing skin injury as characterized by an erythermal response. A Yucatan mini-pig covered with lightly pigmented pink and darkly pigmented brown skin was used in this study. The significance of skin pigmentation was investigated by comparing the transient thermal response, absorption coefficient, and the threshold damage of instant redness within 1 min and persistent redness at 48 It post exposure for dark and light skin areas at 2.0 mu m wavelength. The density of melanin granules did not significantly alter the thermal and optical properties of in vivo skin exposed to 2.0 mu m laser irradiation. For Gaussian shaped beam radiation at 1 s exposure duration and 4.83 mm 1/e(2) Spot diameter, the average radiant exposures at instant and persistent redness thresholds were 3.88 J cm(-2) and 5.08 J cm(-2) for dark skin, respectively, as well as 4.09 J cm(-2) and 4.09 J cm(-2) for light colored skin. Subjectively speaking, however, lightly pigmented mini-pig skin was more suitable for damage threshold estimation because of the increased contrast for visual determination of redness on light skin.
C1 Univ Texas, Biomed Engn Laser Lab, Austin, TX 78712 USA.
USAF, AFRL HEDO, Brooks AFB, TX 78235 USA.
RP Chen, B (reprint author), Univ Texas, Biomed Engn Laser Lab, Austin, TX 78712 USA.
EM chenbo@mail.utexas.edu
NR 12
TC 1
Z9 1
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0017-9078
EI 1538-5159
J9 HEALTH PHYS
JI Health Phys.
PD OCT
PY 2007
VL 93
IS 4
BP 273
EP 278
DI 10.1097/01.HP.0000264936.67385.04
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 211HU
UT WOS:000249515700004
PM 17846523
ER
PT J
AU Jessen, GH
Fitch, RC
Gillespie, JK
Via, G
Crespo, A
Langley, D
Denninghoff, DJ
Trejo, M
Heller, ER
AF Jessen, Gregg H.
Fitch, Robert C., Jr.
Gillespie, James K.
Via, Glen
Crespo, Antonio
Langley, Derrick
Denninghoff, Daniel J.
Trejo, Manuel, Jr.
Heller, Eric R.
TI Short-channel effect limitations on high-frequency operation of
AlGaN/GaN HEMTs for T-Gate devices
SO IEEE TRANSACTIONS ON ELECTRON DEVICES
LA English
DT Article
ID ELECTRON-MOBILITY TRANSISTORS; FIELD-EFFECT TRANSISTORS; LAYER CRYSTAL
QUALITY; GAIN CUTOFF FREQUENCY; GAAS-MESFETS; RF CHARACTERISTICS;
PERFORMANCE; LENGTH; DC; GHZ
AB AlGaN/GaN high-electron mobility transistors (HEMTs) were fabricated on SiC substrates with epitaxial layers grown by multiple suppliers and methods. Devices with gate lengths varying from 0.50 to 0.09 mu m were fabricated on each sample. We demonstrate the impact of varying the gate lengths and show that the unity current gain frequency response (f(T)) is limited by short-channel effects for all samples measured. We present an empirically based physical model that can predict the expected extrinsic f(T) for many combinations of gate length and commonly used barrier layer thickness (t(bar) ) on silicon nitride passivated T-gated AlGaN/GaN HEMTs. The result is that even typical high-aspect-ratio (gate length to barrier thickness) devices show device performance limitations due to short-channel effects. We present the design tradeoffs; and show the parameter space required to achieve optimal frequency performance for GaN technology. These design rules differ from the traditional as technology by requiring a significantly higher aspect ratio to mitigate the short-channel effects.
C1 AF Res Lab, Wright Patterson AFB, OH 45433 USA.
Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
RP Jessen, GH (reprint author), AF Res Lab, Wright Patterson AFB, OH 45433 USA.
NR 39
TC 122
Z9 131
U1 3
U2 38
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9383
J9 IEEE T ELECTRON DEV
JI IEEE Trans. Electron Devices
PD OCT
PY 2007
VL 54
IS 10
BP 2589
EP 2597
DI 10.1109/TED.2007.904476
PG 9
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA 216UI
UT WOS:000249904100003
ER
PT J
AU Beccue, PB
Pekarek, SD
AF Beccue, Philip B.
Pekarek, Steve D.
TI A coupled Piezoelectric/Single-Hall-Sensor position observer for
permanent magnet synchronous machines
SO IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
LA English
DT Article
DE permaneut magnet machines; position measurement; torque control; torque
measurement
ID TORQUE RIPPLE MINIMIZATION; VIBRATION; MOTOR; CONTROLLER; DRIVES
AB In recent years, several control methods have been proposed to reduce the torque ripple produced by permanent magnet synchronous machines [sinusoidal and trapezoidal back electromotive force (EMF)]. In these approaches, a drive system is used to control current harmonics based upon measured machine parameters or measured torque ripple. In general, the methods presented have utilized high-precision position encoders and thus a common perception is that such encoders are required for successful mitigation. In this paper, a position observer is developed that is shown to be suitable for control-based torque ripple mitigation. Additional advantages of the observer are that it achieves excellent start-up performance, requires no knowledge of the machine parameters, and is applicable to machines with an arbitrary back EMF waveform and stator slot configuration.
C1 USAF, Aeronaut Syst Ctr Engn Directorate, Wright Patterson Air Force Base, Wright Patterson AFB, OH 45433 USA.
Purdue Univ, W Lafayette, IN 47907 USA.
RP Beccue, PB (reprint author), USAF, Aeronaut Syst Ctr Engn Directorate, Wright Patterson Air Force Base, Wright Patterson AFB, OH 45433 USA.
EM Philip.beccue@wpafb.af.mil; spekarek@purdue.edu
NR 23
TC 2
Z9 2
U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0278-0046
J9 IEEE T IND ELECTRON
JI IEEE Trans. Ind. Electron.
PD OCT
PY 2007
VL 54
IS 5
BP 2389
EP 2397
DI 10.1109/TIE.2007.900323
PG 9
WC Automation & Control Systems; Engineering, Electrical & Electronic;
Instruments & Instrumentation
SC Automation & Control Systems; Engineering; Instruments & Instrumentation
GA 215XF
UT WOS:000249841600004
ER
PT J
AU Ruan, Y
Hong, L
Wicker, D
AF Ruan, Y.
Hong, L.
Wicker, D.
TI Analytic performance prediction of feature-aided global nearest
neighbour algorithm in dense target scenarios
SO IET RADAR SONAR AND NAVIGATION
LA English
DT Article
ID HRR MEASUREMENTS; TRACKING; ENVIRONMENTS; CLUTTER
AB An analytic performance prediction method for the feature-aided global nearest neighbour tracking algorithm in multi-target tracking (MTT) scenarios is proposed. The approach serves as an alternative to the costly Monte Carlo simulation method. In MTT, evaluation of interference among multiple targets remains a crucial issue on tracking performance study. This issue is investigated in dense target scenarios with feature information and unrestrictive motion. Analytic expressions are developed for tracking performance in terms of the probability of correct association and estimation accuracy. Feature information of targets is incorporated in the formulation which provides us an insight on how the tracking performance is impacted by features. In the derivations, a series of simplification assumptions are made and the results are not intended to be used directly in practical tracking applications. The major contribution of the paper is to provide a theoretical exploration and a methodology for analytic performance prediction of MTT.
C1 Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
USAF, Res Lab, SNAT, WPAFB, Wright Patterson AFB, OH 45433 USA.
RP Ruan, Y (reprint author), Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
EM lang.hong@wright.edu
NR 13
TC 5
Z9 5
U1 0
U2 1
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 1751-8784
J9 IET RADAR SONAR NAV
JI IET Radar Sonar Navig.
PD OCT
PY 2007
VL 1
IS 5
BP 369
EP 376
DI 10.1049/iet-rsn:20050110
PG 8
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 212CE
UT WOS:000249570400006
ER
PT J
AU Fadare, O
Rodriguez, R
AF Fadare, Oluwole
Rodriguez, Rosemarie
TI Squamous dysplasia of the uterine cervix: Tissue sampling-related
diagnostic considerations in 600 consecutive biopsies
SO INTERNATIONAL JOURNAL OF GYNECOLOGICAL PATHOLOGY
LA English
DT Article; Proceedings Paper
CT 96th Annual Meeting of the
United-States-and-Canadian-Academy-of-Pathology
CY MAR 24-30, 2007
CL San Diego, CA
SP US & Canadian Acad Pathol
DE biopsy; cervical intraepithelial neoplasia; cervix; quality assurance;
serial sectioning; squamous intraepithelial lesion; step sectioning
ID CORE NEEDLE BIOPSIES; COLPOSCOPIC IMPRESSION; EPITHELIAL LESIONS; BREAST
BIOPSIES; SPECIMENS; PROSTATE; HISTOLOGY; SECTIONS; REPRODUCIBILITY;
ABNORMALITIES
AB Despite the technological advances in colposcopic techniques, there continues to be a 10% to 20% discordance rate between the colposcopic findings and the histological diagnoses on the resultant biopsies. One of the many factors to which this may be theoretically attributable is related to sampling error from the paraffin-embedded tissue block. In this study, we evaluated the clinical efficacy of routinely obtaining 6 sections in cervical biopsies, using the frequency with which dysplastic lesions would be missed with various levels of sectioning as the sole benchmark determinant of clinical efficacy. Our database was searched for all cervical biopsies in which a diagnosis of squamous dysplastic lesion was made for the period February 1, 2006 to April 28, 2006. All cases were processed in 6-level sectioning, which entails cutting and staining (hematoxylin-eosin) 6 consecutive sections from the paraffin block without preserving or discarding any intervening unstained sections. The first level at which a diagnosis of dysplastic lesion could be unequivocally made by a gynecologic pathologist was determined. Six hundred consecutive biopsies from 404 patients were reviewed. For the whole cohort, the average level at which a dysplastic lesion was unequivocally diagnosable was 1.9 (median, 1). Three hundred fifty-seven (59.5%), 97 (16.2%), 41 (6.8%), 55 (9.2%), 34 (5.7%), and 16 (2.6%) of the 600 lesions were diagnosable at levels 1, 2, 3, 4, 5, and 6, respectively. The cervical intraepithelial neoplasia (CIN) 2 and 3 (n = 89) was, on average, diagnosable at an earlier level (1.35) compared with CIN 1 (level, 2.025; P < 0.001 [n = 511]). Indeed, 79.8% of the CIN 2-3 cases were diagnosable at level 1, as compared with 56% of the CIN 1 cases (P < 0.001); 87, 38, 52, 32, and 16 cases of CIN 1 and 10; 3, 3, 2, and 0 cases of CIN 2-3 were diagnosable at levels 2, 3, 4, 5, and 6, respectively. Therefore, if sectioning were limited to 3 levels, 17.5% (105/600) of all dysplastic lesions would have been missed, including 19.6% (100/511) of CIN 1 and 5.6%0 (5/89) of CIN 2-3. Because not more than 3 levels are routinely evaluated in most laboratories, our findings suggest that sampling error is indeed at least 1 significant factor contributing to colposcopic/histological discrepancies. Using our clinical efficacy standard, when no pathologic findings are initially identified in a colposcopic-directed biopsy, at least 5 levels (a priori or in recuts) are required to ensure a 100% diagnostic accuracy for CIN 2-3.
C1 Wilford Hall USAF Med Ctr, Dept Pathol, Lakeland AF Base, Lackland AFB, TX 78236 USA.
Univ Texas, Hlth Sci Ctr, Dept Pathol, San Antonio, TX 78284 USA.
San Antonio Uniformed Hlth Educ Consortium, Pathol Program, San Antonio, TX USA.
RP Fadare, O (reprint author), Wilford Hall USAF Med Ctr, Dept Pathol, Lakeland AF Base, 2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA.
EM oluwolefadare@yahoo.com
NR 48
TC 8
Z9 9
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0277-1691
J9 INT J GYNECOL PATHOL
JI Int. J. Gynecol. Pathol.
PD OCT
PY 2007
VL 26
IS 4
BP 469
EP 474
DI 10.1097/pgp.0b013e318038154d
PG 6
WC Obstetrics & Gynecology; Pathology
SC Obstetrics & Gynecology; Pathology
GA 213KV
UT WOS:000249666700017
PM 17885500
ER
PT J
AU Jiao, CQ
DeJoseph, CA
Garscadden, A
AF Jiao, C. Q.
DeJoseph, C. A., Jr.
Garscadden, A.
TI Dissociative ionization of JP-10 (C10H16) by electron impact
SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE JP-10; fuel; ionization; electron impact; fragmentation
ID CARBON SLURRY DROPLETS; ION-MOLECULE REACTIONS; MASS-SPECTROMETRY;
COMBUSTION; IGNITION; FUELS; MICROEXPLOSION; ENTHALPIES; KINETICS
AB Ionization of JP-10 (C10H16, exo-tricycle [5.2.1.0(2.6)] decane) by electron impact has been studied using Fourier transform mass spectrometry. Absolute total and partial ionization cross-sections have been measured as functions of the electron energy in the range of 10-200 eV. The major channel of parent ion fragmentation at low energies (<27 eV) produces C9H13+, and at higher energies, C5H7+. Possible fragmentation mechanisms are discussed. Published by Elsevier B.V.
C1 USAF, Res Lab, Prop Directorate, AFRL,PR, Wright Patterson AFB, OH 45433 USA.
Innovat Sci Solut Inc, Dayton, OH 45440 USA.
RP Garscadden, A (reprint author), USAF, Res Lab, Prop Directorate, AFRL,PR, Bldg 18A,1950 5th St,Area B, Wright Patterson AFB, OH 45433 USA.
EM alan.garscadden@wpafb.af.mil
NR 40
TC 5
Z9 5
U1 2
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1387-3806
J9 INT J MASS SPECTROM
JI Int. J. Mass Spectrom.
PD OCT 1
PY 2007
VL 266
IS 1-3
BP 92
EP 96
DI 10.1016/j.ijms.2007.07.012
PG 5
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA 217JP
UT WOS:000249944500011
ER
PT J
AU Chen, L
Lee, H
Guo, ZJ
McGruer, NE
Gilbert, KW
Mall, S
Leedy, KD
Adams, GG
AF Chen, L.
Lee, H.
Guo, Z. J.
McGruer, N. E.
Gilbert, K. W.
Mall, S.
Leedy, K. D.
Adams, G. G.
TI Contact resistance study of noble metals and alloy films using a
scanning probe microscope test station
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID MEMS SWITCHES
AB The proper selection of electrical contact materials is one of the critical steps in designing a metal contact microelectromechanical system (MEMS) switch. Ideally, the contact should have both very low contact resistance and high wear resistance. Unfortunately this combination cannot be easily achieved with the contact materials currently used in macroswitches because the available contact force in microswitches is generally insufficient (less than 1 mN) to break through nonconductive surface layers. As a step in the materials selection process, three noble metals, platinum (Pt), rhodium (Rh), ruthenium (Ru), and their alloys with gold (Au) were deposited as thin films on silicon (Si) substrates. The contact resistances of these materials and their evolution with cycling were measured using a specially developed scanning probe microscope test station. These results were then compared to measurements of material hardness and resistivity. The initial contact resistances of the noble metals alloyed with Au are roughly proportional to their resistivities. Measurements of contact resistance during cycling of different metal films were made under a contact force of 200-250 mu N in a room air environment. It was found that the contact resistance increases with cycling for alloy films with a low concentration of gold due to the buildup of contamination on the contact. However, for alloy films with a high gold content, the contact resistance increase due to contamination is insignificant up to 10(8) cycles. These observations suggest that Rh, Ru, and Pt and their gold alloys of low gold content are prone to contamination failure as contact materials in MEMS switches. (C) 2007 American Institute of Physics.
C1 Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA.
Andong Natl Univ, Sch Adv Mat Engn, Andong 760749, Kyungbuk, South Korea.
AF Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
AF Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
Northeastern Univ, Dept Mech & Ind Engn, Boston, MA 02115 USA.
RP Chen, L (reprint author), Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA.
EM mcgruer@ece.neu.edu
RI Chen, Lei/F-6435-2012
NR 23
TC 49
Z9 50
U1 3
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD OCT 1
PY 2007
VL 102
IS 7
AR 074910
DI 10.1063/1.2785951
PG 7
WC Physics, Applied
SC Physics
GA 220HL
UT WOS:000250147700155
ER
PT J
AU Schwartz, Z
Denison, TA
Bannister, SR
Cochran, DL
Liu, YH
Lohmann, CH
Wieland, M
Boyan, BD
AF Schwartz, Z.
Denison, T. A.
Bannister, S. R.
Cochran, D. L.
Liu, Y. H.
Lohmann, C. H.
Wieland, M.
Boyan, B. D.
TI Osteoblast response to fluid induced shear depends on substrate
microarchitecture and varies with time
SO JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
LA English
DT Article
DE osteoblast; fluid shear; substrate microstructure; titanium
ID TITANIUM SURFACE-ROUGHNESS; ACID-ETCHED SURFACE; GROWTH-FACTOR-BETA;
PROTEIN-KINASE-A; MECHANICAL STRAIN; BONE-CELLS; PHOSPHOLIPASE A(2);
SIGNALING PATHWAY; MG63 CELLS; IN-VITRO
AB Osteoblasts are exposed to fluid shear in vivo but the effects are not well understood, particularly how substrate properties or length of exposure modify the response. Short exposure (1 h) to shear reduces the stimulatory effect of micron-scale surface structure on osteoblast differentiation, but the effects of longer term exposures are not known. To test the hypothesis that substrate-dependent responses of osteoblasts to shear depend on the length of exposure to fluid flow, MG63 osteoblasts were grown on tissue culture glass, which has an average roughness (Ra) < 0.2 mu m; machined Ti disks (PT, Ra < 0.6 mu m); Ti disks with a complex microarchitecture [sand blasted acid etched (SLA), Ra = 4-5 mu m); and Ti plasma-sprayed surfaces [Ti via plasma spray (TPS), Ra = 7 mu m]. Confluent cultures were exposed to pulsatile flow at shear forces of 0, 1, and 14 dynes/cm(2) for 0, 6, 12, and 24 h. Shear reduced cell number on all surfaces, with greatest effects on TPS. Shear had no effect on alkaline phosphatase on smooth surfaces but increased enzyme activity on SLA and TPS in a time-dependent manner. Its effects on osteocalcin, TGF-beta 1, and PGE(2) in the conditioned media were greatest on these surfaces as well. Responses to fluid-induced shear were blocked by the general Cox inhibitor indomethacin and the Cox-2 inhibitor meloxicam, indicating that response to shear is mediated by prostaglandin produced via a Cox-2 dependent mechanism. These results show that the effects of fluid induced shear change with time and are substrate dependent, suggesting that substrate microarchitecture regulates the osteoblast phenotype and effects of shear are determined by the maturation state of the responding population. (c) 2007 Wiley Periodicals.
C1 Georgia Inst Tech, Petit Inst Bioengn & Biosci, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA.
Hebrew Hadassah Fac Dental Med, Dept Perinatol, Jerusalem, Israel.
Univ Texas, Hlth Sci Ctr, Dept Periodont, San Antonio, TX USA.
Lackland AFB, Wilford Hall USAF Med Ctr, Dept Periodont, San Antonio, TX USA.
Univ Hamburg Eppendorf, Dept Orthopaed, Hamburg, Germany.
Inst Strauman AG, Basel, Switzerland.
RP Boyan, BD (reprint author), Georgia Inst Tech, Petit Inst Bioengn & Biosci, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA.
EM barbara.boyan@bme.gatech.edu
FU PHS HHS [1246638]
NR 48
TC 12
Z9 14
U1 0
U2 5
PU WILEY-LISS
PI HOBOKEN
PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 1549-3296
J9 J BIOMED MATER RES A
JI J. Biomed. Mater. Res. Part A
PD OCT
PY 2007
VL 83A
IS 1
BP 20
EP 32
DI 10.1002/jbm.a.31185
PG 13
WC Engineering, Biomedical; Materials Science, Biomaterials
SC Engineering; Materials Science
GA 209KL
UT WOS:000249387300003
PM 17340600
ER
PT J
AU Adekore, BT
Callahan, MJ
Bouthillette, L
Dalmau, R
Sitar, Z
AF Adekore, B. T.
Callahan, M. J.
Bouthillette, L.
Dalmau, R.
Sitar, Z.
TI Synthesis of erbium-doped gallium nitride crystals by the ammonothermal
route
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE ammonothermal; bulk GaN; growth from solution; nitrides; rare earth
compounds; semiconducting III-V materials
ID MOLECULAR-BEAM EPITAXY; VAPOR-PHASE EPITAXY; GAN SINGLE-CRYSTALS; YELLOW
LUMINESCENCE; SUPERCRITICAL AMMONIA; ALUMINUM NITRIDE; III-NITRIDES;
POLARITY DETERMINATION; SURFACE POLARITY; IMPLANTED GAN
AB Gallium nitride (GaN) crystals doped with erbium, were grown via the ammonothermal processes on hydride vapor phase epitaxy (HVPE) GaN seeds. The crystallization conducted in alkaline solutions of supercritical ammonia and potassium azide (KN3) at temperatures between 525 and 550 degrees C yielded growth rates of 15 and 50 pin day on the gallium and nitrogen polar faces, respectively. X-ray diffraction studies indicated single-crystalline growth on the N-polar surface while the Ga-polar surfaces resulted in polycrystalline growth. Photoluminescence spectra acquired at 15 K showed optical transitions corresponding to the inner shell transitions of erbium centers as well as a strong band edge and blue luminescence peaks centered at 3.495 and 2.90 eV, respectively. The incorporation of unintentional impurities, such as oxygen, was found by secondary ion mass spectroscopy (SIMS) to be mitigated to similar to 1 x 1019 and similar to 7 x 10(19)cm(-3) on the gallium and nitrogen polar faces, respectively. Published by Elsevier B.V.
C1 N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA.
USAF, Res Lab, Sensors Directorate, Bedford, MA 01730 USA.
RP Adekore, BT (reprint author), N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA.
EM bainitic@mac.com
NR 62
TC 2
Z9 2
U1 2
U2 13
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 OCT 1
PY 2007
VL 308
IS 1
BP 71
EP 79
DI 10.1016/j.jcrysgro.2007.07.058
PG 9
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA 227DP
UT WOS:000250637700012
ER
PT J
AU Haugan, TJ
Barnes, PN
Campbell, TA
Pierce, NA
Baca, FJ
Locke, MF
Brockman, I
Westerfield, AL
Evans, JM
Morgan, R
Klenk, P
Harrison, BC
Chaney, AD
Maartense, I
AF Haugan, T. J.
Barnes, P. N.
Campbell, T. A.
Pierce, N. A.
Baca, F. J.
Locke, M. F.
Brockman, I.
Westerfield, A. L.
Evans, J. M.
Morgan, R.
Klenk, P.
Harrison, B. C.
Chaney, A. D.
Maartense, I.
TI Superconducting properties of (M-X/YBa2Cu3O7-delta y)(N) multilayer
films with variable layer thickness X
SO JOURNAL OF ELECTRONIC MATERIALS
LA English
DT Article; Proceedings Paper
CT Materials Science and Technology Conference and Exhibition 2006
CY OCT, 2006
CL Cincinnati, OH
DE superconductor; thin film; YBa2Cu3O7-delta; multilayer; nanoparticle;
flux pinning; critical current density; magnetic field; pulsed laser
deposition
ID THIN-FILMS; NANOPARTICLE DISPERSIONS; ENHANCEMENT; YBA2CU3O7-D; STATE
AB The superconducting properties of (M-x/YBa2Cu3O7-delta y)(N) multilayer films were studied for varying layer thickness x. Different M phases were examined including green-phase Y2BaCuO5 (211), Y2O3, BaZrO3, CeO2, SmBa2Cu3O7-delta (Sm123), brown-phase La2BaCuO5 (La211), and MgO. Multilayer (M-x/YBa2 Cu3O7-delta y)(N) structures were grown by pulsed laser deposition onto SrTiO3 or LaAlO3 single-crystal substrates by alternate ablation of separate YBa2Cu3O7-delta (123) and M targets, at temperatures of 750 degrees C to 790 degrees C. The x layer thickness was varied from 0.1 nm to 4.5 nm, and the y 123 layer thickness was kept constant within a given range of 10 to 25 nm. Different M phase and x layer thicknesses caused large variations of the microstructural and superconducting properties, including superconducting transition (T-c), critical current density as a function of applied magnetic field J(c)(H), self-field J(c)(77 K), and nanoparticle layer coverage. Strong flux-pinning enhancement up to 1 to 3x was observed to occur for M additions of 211 and BaZrO3 at 65 to 77 K, Y2O3 at 65 K, and CeO2 for H < 0.5 T. BaZrO3 had a noticeably different epitaxy forming smaller size nanoparticles similar to 8 nm with 3 to 4x higher areal surface article densities than other M phases, reaching 5 x 10(11) nanoparticles cm(-2). To optimize flux pinning and J(c) (65 to 77 K, H = 2 to 3 T), the M layer thickness had to be reduced below a critical value that correlated with a nanoparticle surface coverage <15% by area. Unusual effects were observed for poor pinning materials including Sm123 and La211, where properties such as self-field J(c) unexpectedly increased with increasing x layer thickness.
C1 USAF, Res Lab, Power Div, Wright Patterson AFB, OH 45433 USA.
Univ Dayton, AFRL MLPSE, Wright Patterson AFB, OH 45433 USA.
RP Haugan, TJ (reprint author), USAF, Res Lab, Power Div, Wright Patterson AFB, OH 45433 USA.
EM timothy.haugan@wpafb.af.mil
NR 24
TC 3
Z9 3
U1 1
U2 5
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA
SN 0361-5235
J9 J ELECTRON MATER
JI J. Electron. Mater.
PD OCT
PY 2007
VL 36
IS 10
BP 1234
EP 1242
DI 10.1007/s11664-007-0229-y
PG 9
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA 220IA
UT WOS:000250149200003
ER
PT J
AU Lu, R
Wu, JZ
Varanasi, C
Burke, J
Maartense, I
Barnes, PN
AF Lu, Rongtao
Wu, Judy Z.
Varanasi, Chakrapani
Burke, Jack
Maartense, Iman
Barnes, Paul N.
TI Textured ion-beam assisted deposition: Magnesium oxide template on
non-metallic flexible ceraflex for epitaxial growth of perovskite films
SO JOURNAL OF ELECTRONIC MATERIALS
LA English
DT Article; Proceedings Paper
CT Materials Science and Technology Conference and Exhibition 2006
CY OCT, 2006
CL Cincinnati, OH
SP Amer Ceram Soc, Assoc Iron & Steel Technol, ASME Int, Minerals, Met & Mat Soc
DE IBAD-MgO; textured template; ceraflex; perovskite films
ID BUFFER LAYERS; SUPERCONDUCTING PROPERTIES; COATED CONDUCTORS; MGO
TEMPLATE; BICRYSTALS; TAPES; GLASS
AB This paper reports on a systematic study of the development of bi-axially textured magnesium oxide (MgO) templates on flexible ceramic polycrystalline ceraflex substrates by ion-beam assisted deposition (IBAD) and the preliminary test of the growth of YBa(2)Cu(3)o(7) on top. The rough surface of the original ceraflex, with a typical roughness of about 100 nm, presented a serious challenge in the development of textured IBAD-MgO. By a coating of multiple layers of spin-on-glass (SOG), the surface roughness has been reduced to about a few nanometers. After an amorphous Y(2)O(3) buffer had been deposited on multilayer SOG coated ceraflex, IBAD-MgO and homo-epitaxial MgO were grown with good in-plane texture of Delta phi similar to 9.3 degrees An epitaxial SrTiO(3) film was subsequently deposited on this textured template with in-plane Delta phi similar to 10.8 degrees Finally, an epitaxial YBa(2)Cu(3)O(7) superconducting film was grown on LaMnO(3) buffered and IBAD-MgO textured ceraflex, and AC susceptibility examination indicated the transition temperature was 88 K. The results have demonstrated that an IBAD-MgO textured template on ceraflex can be used for the epitaxial growth of perovskite films.
C1 Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA.
Univ Dayton, Res Inst, Dayton, OH 45469 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Lu, R (reprint author), Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA.
EM rtlu@ku.edu
NR 19
TC 3
Z9 3
U1 1
U2 4
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0361-5235
J9 J ELECTRON MATER
JI J. Electron. Mater.
PD OCT
PY 2007
VL 36
IS 10
BP 1258
EP 1264
DI 10.1007/s11664-007-0196-3
PG 7
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA 220IA
UT WOS:000250149200006
ER
PT J
AU Varanasi, CV
Chuck, L
Brunke, L
Burke, J
Chaney, AD
Barnes, PN
AF Varanasi, Chakrapani V.
Chuck, Leon
Brunke, Lyle
Burke, Jack
Chaney, Andrew D.
Barnes, Paul N.
TI Yield strengths of biaxially textured metallic substrates (Ni and its
alloys) determined using a simplified test method
SO JOURNAL OF ELECTRONIC MATERIALS
LA English
DT Article; Proceedings Paper
CT Materials Science and Technology Conference and Exhibition 2006
CY OCT, 2006
CL Cincinnati, OH
SP Amer Ceram Soc, Assoc Iron & Steel Technol, ASME Int, Minerals, Met & Mat Soc
DE coated conductors; bi-axial textured metal substrates; Ni and its
alloys; yield strength
ID YBA2CU3O7-X COATED CONDUCTORS; TAPES; YBCO; RABITS; FABRICATION;
DEPOSITION; CU; PROGRESS; COPPER; BUFFER
AB A simple testing method is used to compare the yield strengths (YS) of biaxially textured metallic substrates (Ni and its alloys) presently under development for YBa2Cu3O7, coated conductors. This method is based on a retired ASTM D3379 tensile test standard method that was originally recommended for single filament materials. Several common textured substrates, such as Ni, Ni-3at.%W, and Ni-5at.%W, procured from different manufacturers, were tested using this method, and the data were compared with the values reported in the literature. A new alloy substrate (constantan (Cu55-Ni44-Mn1wt.%)) that is biaxially textured in-house was also tested using this method, and the YS data were compared with those of other substrates. For the substrates used in this study, the data obtained using this method indicated that Ni substrates have YS of similar to 52 MPa, Ni-3at.%W substrates have YS of similar to 106 MPa, Ni-5at.%W substrates have YS 163 MPa, and Cu55-Ni44-Mn1 wt.% substrates have YS of 74 MPa.
C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Varanasi, CV (reprint author), Univ Dayton, Res Inst, 300 Coll Pk, Dayton, OH 45469 USA.
EM chakrapani.varanasi@wpafb.af.mil
NR 22
TC 2
Z9 2
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0361-5235
EI 1543-186X
J9 J ELECTRON MATER
JI J. Electron. Mater.
PD OCT
PY 2007
VL 36
IS 10
BP 1265
EP 1269
DI 10.1007/s11664-007-0215-4
PG 5
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA 220IA
UT WOS:000250149200007
ER
PT J
AU Hoffman, GJ
Thal, AE
Webb, TS
Weir, JD
AF Hoffman, Greg J.
Thal, Alfred E., Jr.
Webb, Timothy S.
Weir, Jeffery D.
TI Estimating performance time for construction projects
SO JOURNAL OF MANAGEMENT IN ENGINEERING
LA English
DT Article
AB The prediction of performance time for construction projects is a problem of interest to both researchers and practitioners. This research seeks to gain insight into the significant factors impacting construction duration by developing a regression model. Data were collected for 856 facility projects completed between 1988 and 2004. These data were analyzed using Bromilow's time-cost (BTC) model (1969) as well as multiple linear regression. The multiple linear regression model was found to provide the most acceptable prediction. As in the BTC model and previous research reported in the literature, a significant correlation was found to exist between cost and duration. However, several other factors were also identified that resulted in significantly lower than average construction durations. These include projects completed within certain management groupings, managed by a certain construction agent, and designed by in-house personnel.
C1 Readiness Flight Commander, Hill AFB, UT 84056 USA.
USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Hoffman, GJ (reprint author), Readiness Flight Commander, 775th Civil Engn Squadron,7340 Wardleigh Rd,Bldg, Hill AFB, UT 84056 USA.
EM greg.hoffman1@hill.af.mil; al.thal@afit.edu; timothy.webb@afit.edu;
jeffery.weir@afit.edu
NR 17
TC 18
Z9 18
U1 2
U2 9
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 0742-597X
J9 J MANAGE ENG
JI J. Manage. Eng.
PD OCT
PY 2007
VL 23
IS 4
BP 193
EP 199
DI 10.1061/(ASCE)0742-597X(2007)23:4(193)
PG 7
WC Engineering, Industrial; Engineering, Civil
SC Engineering
GA 214AT
UT WOS:000249709100005
ER
PT J
AU Zhong, YC
Wong, KS
Zhang, WL
Look, DC
AF Zhong, Yongchun
Wong, Kam Sing
Zhang, Weili
Look, D. C.
TI Surface and bulk exciton recombination dynamics in GaN freestanding
films via one- and two-photon excitations
SO JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
LA English
DT Article; Proceedings Paper
CT International Conference on Optical and Optelectronic Properties of
Materials and Applications
CY JUL 16-21, 2006
CL Darwin, AUSTRALIA
SP Charles Darwin Univ, Australian Res Council Nanotechnol Network, Springer, Wiley, OzOpt, Perkin Elmer
ID VAPOR-PHASE EPITAXY; TIME-RESOLVED PHOTOLUMINESCENCE;
MOLECULAR-BEAM-EPITAXY; QUANTUM-WELLS; LUMINESCENCE; LIFETIME;
TEMPERATURE; DEPOSITION; DEPENDENCE; GAAS
AB We have measured the photoluminescence (PL) lifetime of a freestanding GaN film using one- and two-photon excitations to demonstrate the dramatic difference in exciton recombination dynamics at the surface and in the bulk. An ultra-long exciton PL lifetime of 17.2 ns at 295 K is observed from a GaN freestanding film using two-photon excitation, whereas less than 100 ps lifetime is observed for one-photon excitation, suggesting that nonradiative processes from surface defects account for the short PL lifetime measured. The room temperature exciton lifetime of 17.2 ns is the longest ever reported for GaN film. A monotonic increase in two-photon excited PL lifetime with increasing temperature and the linear dependence of the exciton lifetime with emission wavelength show good agreement with the theoretical predictions, indicating that radiative recombination dominates for bulk excited state relaxation processes.
C1 Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China.
Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA.
Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Zhong, YC (reprint author), Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China.
EM vzhong@ust.hk; phkswong@ust.hk; w_wzhang@yahoo.com
RI Zhang, Weili/C-5416-2011;
OI Zhang, Weili/0000-0002-8591-0200; Zhong, Yongchun/0000-0001-9919-1430
NR 27
TC 1
Z9 1
U1 2
U2 10
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0957-4522
J9 J MATER SCI-MATER EL
JI J. Mater. Sci.-Mater. Electron.
PD OCT
PY 2007
VL 18
SU 1
BP S453
EP S457
DI 10.1007/s10854-007-9253-1
PG 5
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied; Physics, Condensed Matter
SC Engineering; Materials Science; Physics
GA 201AG
UT WOS:000248803300092
ER
PT J
AU Kundu, T
Das, S
Jata, KV
AF Kundu, Tribikram
Das, Samik
Jata, Kumar V.
TI Point of impact prediction in isotropic and anisotropic plates from the
acoustic emission data
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID COMPOSITE STRUCTURES; WAVE-PROPAGATION; DAMAGE; VIBRATION
AB It is shown in this paper that the conventional triangulation technique is not very reliable for locating the impact point even in isotropic plates when the sensors are placed close to the point of strike for two reasons: First, it is difficult to pinpoint the exact time of arrival of the signal and, second, the Lamb modes in a plate are dispersive. Dispersive signals attenuate differently at various frequencies and propagate with different speeds causing distortions in the received signals, and thus introduce error in the time of flight measurement. The triangulation technique assumes that wave speeds in all directions are the same, which is not true for anisotropic plates. Here an alternative approach based on an optimization scheme is proposed to locate the point of impact in isotropic and anisotropic plates. A formulation is presented for the general anisotropic case. Experiments are carried out with an aluminum plate by dropping balls on the plate and picking up acoustic signals at different locations. The impact points predicted by the conventional triangulation technique and the proposed modified method are compared for this isotropic plate. Then it is investigated how the prediction would change if the plate is assumed to have some anisotropy. (C) 2007 Acoustical Society of America.
C1 Univ Arizona, Dept Civil Engn & Engn Mech, Tucson, AZ 85721 USA.
USAF, Res Lab, MLLP, NDE Branch, Wright Patterson AFB, OH 45433 USA.
RP Kundu, T (reprint author), Univ Arizona, Dept Civil Engn & Engn Mech, Tucson, AZ 85721 USA.
EM tkundu@email.arizona.edu; samik@email.arizona.edu;
kumar.jata@wpafb.af.mil
NR 14
TC 51
Z9 51
U1 1
U2 7
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 OCT
PY 2007
VL 122
IS 4
BP 2057
EP 2066
DI 10.1121/1.2775322
PG 10
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 218PI
UT WOS:000250027000022
PM 17902843
ER
PT J
AU Mogilevsky, P
Kerans, RJ
Lee, HD
Keller, KA
Parthasarathyz, TA
AF Mogilevsky, Pavel
Kerans, Ronald J.
Lee, Hee Dong
Keller, Kristin A.
Parthasarathyz, Triplicane A.
TI On densification of porous materials using precursor solutions
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID PORE-SIZE DISTRIBUTIONS; MECHANICAL-PROPERTIES; POWDER COMPACTS;
INFILTRATION; ALUMINA; SPHERES; COMPOSITE; PARTICLE; PACKING; MATRIX
AB A quantitative model describing the densification of porous compacts using liquid solutions that takes into account the gradual sealing-off of the porosity has been proposed. The model was applied to experimental data on densification of alumina compacts and alumina fiber-reinforced ceramic composites infiltrated by an aqueous CrO3 solution. The results obtained with the present model were in good agreement with those expected based on the statistical models and computer simulations of the packing of spheres. Recommendations to improve the efficiency of the densification of porous materials using precursor solutions are suggested based on the results of the present work.
C1 Universal Energy Syst Inc, Dayton, OH 45432 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Mogilevsky, P (reprint author), Universal Energy Syst Inc, Dayton, OH 45432 USA.
EM Pavel.Mogilevsky@wpafb.af.mil
NR 38
TC 7
Z9 7
U1 0
U2 6
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0002-7820
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD OCT
PY 2007
VL 90
IS 10
BP 3073
EP 3084
DI 10.1111/j.1551-2916.2007.01889.x
PG 12
WC Materials Science, Ceramics
SC Materials Science
GA 213JL
UT WOS:000249663000007
ER
PT J
AU Wang, X
Ma, N
Bliss, DF
Isler, GW
Becla, P
AF Wang, X.
Ma, N.
Bliss, D. F.
Isler, G. W.
Becla, P.
TI Combining static and rotating magnetic fields during modified vertical
bridgman crystal growth
SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
LA English
DT Article
AB Static magnetic fields have been widely used to control the heat and mass transfer during crystal growth, whereas rotating magnetic fields are attracting a growing attention for crystal-growth technologies from the melt. A combination of static and rotating magnetic fields can be used to control the transport phenomena during semiconductor crystal growth. This paper treats the flow of molten gallium-antimonide and the dopant transport during the vertical Bridgman process using submerged heater growth in this combination of externally applied fields. This paper investigates the effects of these fields on the transport in the melt and on the dopant distributions in the crystal.
C1 Scroll Labs Inc, Bolingbrook, IL 60440 USA.
N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA.
USAF, Res Lab, SNHC, Optoelect Technol Branch, Hanscom AFB, MA 01731 USA.
Iseler Assoc, Chelmsford, MA 01824 USA.
Solid State Sci, Hollis, NH 03049 USA.
RP Wang, X (reprint author), Scroll Labs Inc, 479 Quadrangle Dr,Unit G, Bolingbrook, IL 60440 USA.
EM nancy_ma@ncsu.edu
NR 0
TC 1
Z9 2
U1 0
U2 3
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0887-8722
J9 J THERMOPHYS HEAT TR
JI J. Thermophys. Heat Transf.
PD OCT-DEC
PY 2007
VL 21
IS 4
BP 736
EP 743
DI 10.2514/1.28772
PG 8
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA 222FQ
UT WOS:000250281900009
ER
PT J
AU Clark, JP
Grover, EA
AF Clark, J. P.
Grover, E. A.
TI Assessing convergence in predictions of periodic-unsteady flowfields
SO JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
LA English
DT Article; Proceedings Paper
CT International-Gas-Turbine-Institute Turbo Expo Conference of the
American-Society-of-Mechanical-Engineers
CY MAY 08-11, 2006
CL Barcelona, SPAIN
SP Amer Soc Mech Engineers, Int Gas Turbine Inst
ID NAVIER-STOKES SIMULATIONS; ROTOR-STATOR INTERACTION; HEAT-TRANSFER;
BLADE
AB Predictions of time-resolved flowfields are now commonplace within the gas-turbine industry, and the results of such simulations are often used to make design decisions during the development of new products. Hence it is necessary for design engineers to have a robust method to determine the level of convergence in design predictions. Here we report on a method developed to determine the level of convergence in a predicted flowfield that is characterized by periodic unsteadiness. The method relies on fundamental concepts from digital signal processing including the discrete Fourier transform, cross correlation, and Parseval's theorem. Often in predictions of vane-blade interaction in turbomachines, the period of the unsteady fluctuations is expected. In this method, the development of time-mean quantities, Fourier components (both magnitude and phase), cross correlations, and integrated signal power are tracked at locations of interest from one period to the next as the solution progresses. Each of these separate quantities yields some relative measure of convergence that is subsequently processed to form a fuzzy set. Thus the overall level of convergence in the solution is given by the intersection of these sets. Examples of the application of this technique to several predictions of unsteady flows from two separate solvers are given. These include a prediction of hot-streak migration as well as more typical cases. It is shown that the method yields a robust determination of convergence. Also, the results of the technique can guide further analysis and/or post-processing of the flowfield. Finally, the method is useful for the detection of inherent unsteadiness in the flowfield, and as such it can be used to prevent design escapes.
C1 USAF, Res Lab, Propuls Directorate, Turbine Engine Div,urbine Branch, Wright Patterson AFB, OH 45433 USA.
United Technol Pratt & Whitney, Turbine Aerodynam, E Hartford, CT 06108 USA.
RP Clark, JP (reprint author), USAF, Res Lab, Propuls Directorate, Turbine Engine Div,urbine Branch, Bldg 18,Room 136D,1950 5th St, Wright Patterson AFB, OH 45433 USA.
EM john.clark@pr.wpafb.af.mil; eric.grover@pw.utc.com
NR 40
TC 18
Z9 18
U1 0
U2 4
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0889-504X
J9 J TURBOMACH
JI J. Turbomach.-Trans. ASME
PD OCT
PY 2007
VL 129
IS 4
BP 740
EP 749
DI 10.1115/1.2720504
PG 10
WC Engineering, Mechanical
SC Engineering
GA 228PY
UT WOS:000250743200011
ER
PT J
AU Baughman, SM
Richardson, RR
Podberesky, DJ
Dalrymplet, NC
Yerkes, EB
AF Baughman, Steven M.
Richardson, Randy R.
Podberesky, Daniel J.
Dalrymplet, Neal C.
Yerkes, Elizabeth B.
TI 3-dimensional magnetic resonance genitography: A different look at
cloacal malformations
SO JOURNAL OF UROLOGY
LA English
DT Article; Proceedings Paper
CT 58th Annual Meeting of the American-Academy-of-Pediatrics
CY OCT 07-10, 2006
CL Atlanta, GA
SP Amer Acad Pediat
DE abnormalities; cloaca; anatomy; magnetic resonance imaging; imaging;
three-dimensional
ID ANORECTAL-MALFORMATIONS; UROGRAPHY
AB Purpose: Standard contrast genitography and endoscopy have been the cornerstone of preoperative investigation of anatomy in complex cloacal malformations. In many cases standard genitography is ambiguous and lengthy endoscopy may be required to define the anatomy. Nonenhanced magnetic resonance imaging lacks definition of the nondistended common channel and confluence. To our knowledge we introduce 3-dimensional magnetic resonance genitography for delineating the unique anatomical features of these complex anomalies.
Materials and Methods: Contrast genitography, endoscopy and 3-dimensional magnetic resonance genitography were performed preoperatively in 4 female infants with cloacal malformations. Three-dimensional magnetic resonance genitography was performed using a 3-dimensional spoiled gradient technique after the instillation of gadolinium-diethylenetetramine pentaacetic acid solution via the common channel and cutaneous vesicostomy, when present. Augmented pressure distal colostogram with gadolinium via the mucous fistula was included. Three-dimensional images were constructed using a commercially available workstation.
Results: Three-dimensional magnetic resonance genitography yielded anatomical information far superior to that of standard genitography in all cases and it provided information on female genital tract anomalies and hindgut confluence that were not fully appreciated at initial endoscopy. The confluence was most accurately represented by augmented pressure colostogram. The length of the common channel was consistent with that on endoscopy. Rotating 3-dimensional images illustrated the unique anatomical relationships. No magnetic resonance imaging specific complications were observed.
Conclusions: Three-dimensional magnetic resonance genitography provides superior anatomical detail for the preoperative assessment of cloacal malformations. It augments the information obtained by standard magnetic resonance imaging of the pelvic organs, levators and lumbosacral spine. Three-dimensional magnetic resonance genitography has great potential as a standard for preoperative anatomical evaluation and it will likely simplify preoperative endoscopy rather than supplant it.
C1 Wilford Hall USAF Med Ctr, Dept Urol, Lackland AFB, TX 78236 USA.
Wilford Hall USAF Med Ctr, Dept Radiol, Lackland AFB, TX 78236 USA.
RP Yerkes, EB (reprint author), Childrens Mem Hosp, Dept Urol, 2300 Childrens Plaza,Box 24, Chicago, IL 60613 USA.
NR 7
TC 7
Z9 8
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0022-5347
J9 J UROLOGY
JI J. Urol.
PD OCT
PY 2007
VL 178
IS 4
BP 1675
EP 1678
DI 10.1016/j.juro.2007.03.196
PN 2
PG 4
WC Urology & Nephrology
SC Urology & Nephrology
GA 212BK
UT WOS:000249568400038
PM 17707025
ER
PT J
AU Redfield, RC
AF Redfield, Robin C.
TI Random response relationships to transfer function and state-space
properties
SO JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
LA English
DT Article
DE dynamic systems; stochastic response; random vibration; mean-square
response
AB Output variables of dynamic systems subject to random inputs are often quantified by mean-square calculations. Computationally for linear systems, these typically involve integration of the output spectral densin over frequency. Numerically, this is a straightforward task and, analytically, methods exist to find mean-square values as functions of transfer Junction (frequency response) coefficients. These formulations offer analytical relationships between system parameters and mean-square response. This paper develops further analytical relationships in calculating mean-square values as functions of transfer function and state-space properties. Specifically, mean-square response is formulated from (i) system pole-zero locations, (ii) as a spectral decomposition, and (iii) in terms of a system matrix transfer function. Direct, closed-form relationships between response and these properties are afforded. These new analytical representations of the mean-square calculation can provide significant insight into dynamic system response and optimal design/tuning of dynamic systems.
C1 USAF Acad, Dept Engn Mech, Colorado Springs, CO 80840 USA.
RP Redfield, RC (reprint author), USAF Acad, Dept Engn Mech, Colorado Springs, CO 80840 USA.
EM Rob.Redfield@Usafa.Af.Mil
NR 9
TC 0
Z9 0
U1 0
U2 1
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 1048-9002
J9 J VIB ACOUST
JI J. Vib. Acoust.-Trans. ASME
PD OCT
PY 2007
VL 129
IS 5
BP 672
EP 677
DI 10.1115/1.2748458
PG 6
WC Acoustics; Engineering, Mechanical; Mechanics
SC Acoustics; Engineering; Mechanics
GA 217PY
UT WOS:000249961000016
ER
PT J
AU LeLoup, JW
Ponterio, R
AF LeLoup, Jean W.
Ponterio, Robert
TI On the net - LiTgloss
SO LANGUAGE LEARNING & TECHNOLOGY
LA English
DT Editorial Material
C1 USAF Acad, Scott Afb, IL 62225 USA.
SUNY Coll Cortland, Cortland, NY 13045 USA.
RP LeLoup, JW (reprint author), USAF Acad, Scott Afb, IL 62225 USA.
NR 4
TC 2
Z9 2
U1 0
U2 1
PU UNIV HAWAII, NATL FOREIGN LANGUAGE RESOURCE CENTER
PI HONOLULU
PA 1859 EAST WEST RD, 106, HONOLULU, HI 96822 USA
SN 1094-3501
J9 LANG LEARN TECHNOL
JI Lang. Learn. Technol.
PD OCT
PY 2007
VL 11
IS 3
BP 4
EP 7
PG 4
WC Education & Educational Research; Linguistics
SC Education & Educational Research; Linguistics
GA 236QK
UT WOS:000251318300003
ER
PT J
AU Brothers, MD
Hilger, K
Carson, JM
Sullivan, L
Byrnes, WC
AF Brothers, Michael D.
Hilger, Kristin
Carson, John M.
Sullivan, Luisa
Byrnes, William C.
TI GXT responses in altitude-acclimatized cyclists during sea-level
simulation
SO MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
LA English
DT Article
DE chronic hypobaric hypoxia; altitude acclimatization; exercise-induced
arterial hypoxemia; maximal aerobic capacity; lactate threshold
ID INDUCED ARTERIAL HYPOXEMIA; MODERATE-ALTITUDE; YOUNG-WOMEN; TRAIN LOW;
EXERCISE; PERFORMANCE; EFFICIENCY; ENDURANCE; RUNNERS; HYPOXIA
AB Purpose: This study examined the effects of gender on graded exercise stress test (GXT) response in moderate-altitude (MA)-acclimatized cyclists during sea-level (SL) simulation. It was hypothesized that alterations in arterial saturation would relate to changes in (V) over dot O-2peak. Methods: Twenty competitive cyclists (12 males, 8 females) who were residents of MA locations underwent two randomized bicycle GXTs: one under local normoxic hypobaria, and the other under simulated SL conditions. Results: Under the SL condition, the cyclists demonstrated a significant increase (2-3%) in absolute and relative (V) over dot O-2peak, improved (4%) economy at lactate threshold (LT), and time-adjusted peak power (7%); the range of improvement between individuals varied from -6% to +25%. Simulated SL also resulted in a greater arterial saturation (SaO2) at rest and (V) over dot O-2peak, and significantly less desaturation (4 vs 8%) from rest to (V) over dot O-2peak. The individual variability in the change (Delta) in (V) over dot O-2peak was not significantly correlated to SL SaO2 or any other SaO2 variable analyzed, regardless of whether we examined each gender individually or combined. Significant correlations were found between Delta-peak power and Delta-economy as well as Delta-(V) over dot O-2peak and Delta-GXT time. These correlations as well as degree of improvement varied by gender. Conclusions: These data suggest that chronic residence at MA may attenuate the occurrence of exercise-induced arterial hypoxemia and eliminate the relationship between SaO2 and Delta-(V) over dot O-2peak that has been reported among SL residents acutely exposed to altitude. Additionally, the improvements that occur in predictors of aerobic performance when MA residents are exposed acutely to SL conditions have a large degree of individual variability, and the mechanism(s) for improvement may vary by gender.
C1 Univ Colorado, Dept Integrat Physiol, Boulder, CO 80309 USA.
RP Brothers, MD (reprint author), USAF Acad, ADML Human Performance Lab, 2169 Field House Dr, Colorado Springs, CO 80840 USA.
EM michael.brothers@colorado.edu
NR 31
TC 1
Z9 1
U1 0
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0195-9131
J9 MED SCI SPORT EXER
JI Med. Sci. Sports Exerc.
PD OCT
PY 2007
VL 39
IS 10
BP 1727
EP 1735
DI 10.1249/mss.0b013e3181238a3f
PG 9
WC Sport Sciences
SC Sport Sciences
GA 217RD
UT WOS:000249964100008
PM 17909399
ER
PT J
AU Tschopp, MA
Spearot, DE
McDowell, DL
AF Tschopp, M. A.
Spearot, D. E.
McDowell, D. L.
TI Atomistic simulations of homogeneous dislocation nucleation in single
crystal copper
SO MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
LA English
DT Article
ID TILT GRAIN-BOUNDARIES; STACKING-FAULT ENERGIES; PLASTIC-DEFORMATION; FCC
METALS; BICRYSTAL INTERFACES; MESOSCOPIC SCALE; STRUCTURAL-UNIT; STRESS;
DYNAMICS; ALUMINUM
AB Atomistic simulations are used to investigate how the stress required for homogeneous nucleation of partial dislocations in single crystal copper under uniaxial tension changes as a function of crystallographic orientation. Molecular dynamics is employed based on an embedded-atom method potential for Cu at 10 and 300 K. Results indicate that non-Schmid parameters are required to describe dislocation nucleation for certain single crystal orientations. Specifically, we find that the stereographic triangle can be divided into two regions: a region where dislocation nucleation is dominated by the conventional Schmid factor ( the resolved shear stress in the direction of slip) and a region where dislocation nucleation is dominated by the normal factor ( the resolved stress normal to the slip plane). A continuum relationship that incorporates Schmid and non-Schmid terms to correlate the stress required for dislocation nucleation over all tensile axis orientations within the stereographic triangle is presented. The significance of this work is that simulation results are cast into an atomistically inspired continuum formulation for partial dislocation loop nucleation in face-centered cubic single crystals.
C1 Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA.
Univ Arkansas, Dept Mech Engn, Fayetteville, AR 72701 USA.
Universal Technol Corp, Dayton, OH 45432 USA.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Tschopp, MA (reprint author), Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
EM david.mcdowell@me.gatech.edu
RI Tschopp, Mark/B-1594-2008
OI Tschopp, Mark/0000-0001-8471-5035
NR 48
TC 63
Z9 65
U1 2
U2 37
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0965-0393
J9 MODEL SIMUL MATER SC
JI Model. Simul. Mater. Sci. Eng.
PD OCT
PY 2007
VL 15
IS 7
BP 693
EP 709
DI 10.1088/0965-0393/15/7/001
PG 17
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 220ER
UT WOS:000250140200001
ER
PT J
AU Birnkrant, MJ
Li, CY
Natarajan, LV
Tondiglia, VP
Sutherland, RL
Lloyd, PF
Bunning, TJ
AF Birnkrant, Michael J.
Li, Christopher Y.
Natarajan, Lalgudi V.
Tondiglia, Vincent P.
Sutherland, Richard L.
Lloyd, Pamela F.
Bunning, Timothy J.
TI Layer-in-layer hierarchical nanostructures fabricated by combining
holographic polymerization and block copolymer self-assembly
SO NANO LETTERS
LA English
DT Article
ID DISPERSED LIQUID-CRYSTALS; PHOTONIC CRYSTALS; DIBLOCK COPOLYMER;
BOTTOM-UP; LITHOGRAPHY; NANOPARTICLES; TEMPLATES
AB We report the combination of top-down and bottom-up nanomanufacturing techniques to fabricate active, hierarchically structured volume reflection gratings. Holographic polymerization (H-P) formed lamellar structures of similar to 200 nm in thickness, confining a block copolymer (BCP) to similar to 100 nm domains. Subsequently, the BCP self-assembles into nanolayers with a period of similar to 21 nm. We envisage that this approach opens a gateway to fabricating hierarchical nanostructures at different length scales.
C1 Drexel Univ, AJ Drexel Nanotechnol Inst, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
Sci Applicat Int Corp, Dayton, OH 45431 USA.
Universal Energy Syst Inc, Dayton, OH 45432 USA.
Air Force Res Lab, Mat & Manufacturing Directorate, Wright Patterson AFB, OH 45433 USA.
RP Li, CY (reprint author), Drexel Univ, AJ Drexel Nanotechnol Inst, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
EM Bunning@wpafb.af.mil; Chrisli@drexel.edu
RI Li, Christopher/A-1603-2012
NR 34
TC 19
Z9 19
U1 1
U2 14
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 OCT
PY 2007
VL 7
IS 10
BP 3128
EP 3133
DI 10.1021/nl071673j
PG 6
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 220FU
UT WOS:000250143400034
PM 17854228
ER
PT J
AU Klimo, P
Slotkin, JR
Brockmeyer, D
AF Klimo, Paul, Jr.
Slotkin, Jonathan R.
Brockmeyer, Douglas
TI Pediatric spine surgery (part II) - Trauma, tumors and surgical strategy
- Preface
SO NEUROSURGERY CLINICS OF NORTH AMERICA
LA English
DT Editorial Material
C1 USAF, Wright Patterson AFB, OH 45433 USA.
Harvard Univ, Sch Med, Brigham & Womens Hosp, Dept Neurosurg, Boston, MA 02215 USA.
Univ Utah, Primary Childrens Med Ctr, Div Pediat Neurosurg, Dept Neurosurg, Salt Lake City, UT 84113 USA.
RP Klimo, P (reprint author), USAF, 4881 Sugar Maple Dr, Wright Patterson AFB, OH 45433 USA.
EM atomkpnk@yahoo.com; jslotkin@partners.org;
douglas.brockmeyer@hsc.utah.edu
NR 0
TC 0
Z9 0
U1 0
U2 0
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 1042-3680
J9 NEUROSURG CLIN N AM
JI Neurosurg. Clin. N. Am.
PD OCT
PY 2007
VL 18
IS 4
BP IX
EP IX
DI 10.1016/j.nec.2007.10.002
PG 1
WC Clinical Neurology; Surgery
SC Neurosciences & Neurology; Surgery
GA 237HO
UT WOS:000251365000001
ER
PT J
AU Peelle, MW
Luhmann, SJ
AF Peelle, Michael W.
Luhmann, Scott J.
TI Management of adolescent idiopathic scoliosis
SO NEUROSURGERY CLINICS OF NORTH AMERICA
LA English
DT Article
ID CLASSIFICATION; RELIABILITY; FUSION; INSTRUMENTATION; INTRAOBSERVER;
INTEROBSERVER; ANTERIOR; PATIENT; CURVE; LENKE
AB This article outlines several critical areas in the contemporary evaluation and treatment of the adolescent patient who has idiopathic scoliosis. Highlights of the physical examination combined with key radiographic measurements provide a framework for the algorithm of operative versus nonoperative treatment. The basics of the Lenke classification system are presented in a step-by-step outline, and the surgical treatment options based on this classification are summarized. This article provides a core knowledge base to facilitate a more thorough comprehension of adolescent scoliosis and allow readers to understand emerging publications more readily.
C1 Med Grp 88th, Orthopaed Spine Surg, Dayton, OH 45433 USA.
Wright State Univ, Dept Orthopaed Surg, Dayton, OH 45435 USA.
Washington Univ, Sch Med, Dept Orthopaed Surg, St Louis, MO 63110 USA.
RP Peelle, MW (reprint author), 88 SGOS-SGCO,4881 Sugar Maple Dr, Wright Patterson AFB, OH 45433 USA.
EM michael.peelle@wpafb.af.mil
NR 20
TC 5
Z9 5
U1 0
U2 1
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 1042-3680
J9 NEUROSURG CLIN N AM
JI Neurosurg. Clin. N. Am.
PD OCT
PY 2007
VL 18
IS 4
BP 575
EP +
DI 10.1016/j.nec.2007.07.004
PG 10
WC Clinical Neurology; Surgery
SC Neurosciences & Neurology; Surgery
GA 237HO
UT WOS:000251365000002
PM 17991584
ER
PT J
AU Klimo, P
Ware, ML
Gupta, N
Brockmeyer, D
AF Klimo, Paul, Jr.
Ware, Marcus L.
Gupta, Nalin
Brockmeyer, Douglas
TI Cervical spine trauma in the pediatric patient
SO NEUROSURGERY CLINICS OF NORTH AMERICA
LA English
DT Review
ID ATLANTO-OCCIPITAL DISLOCATION; ANTERIOR SCREW FIXATION; SUSPECTED
CHILD-ABUSE; ATLANTOOCCIPITAL DISLOCATION; HANGMANS-FRACTURE;
CORD-INJURY; RADIOGRAPHIC ABNORMALITY; ODONTOID PROCESS; ROTATORY
FIXATION; YOUNG-CHILDREN
AB Injuries to the pediatric cervical spine occur infrequently. Numerous unique anatomic and biomechanical features of the pediatric spine render it much more flexible than the adult spine. These features give rise to significant differences in the presentation, diagnosis, treatment, and prognosis of pediatric cervical trauma compared with adults. Younger children more often suffer injury to the upper cervical spine with greater neurologic injury and fewer fractures. Once the child reaches the age of 10 years, he or she develops a more adult-type spine, and injuries are thus more similar to those seen in the adult population. The unique anatomic and biornechanical differences in the pediatric spine are discussed, along with the various common and unique injuries.
C1 Med Grp 88th, Wright Patterson AFB, OH 45431 USA.
Tulane Univ, Sch Med, Dept Neurosurg, New Orleans, LA 70112 USA.
Univ Calif San Francisco, Dept Neurosurg, San Francisco, CA 94143 USA.
Univ Utah, Dept Neurosurg, Salt Lake City, UT 84132 USA.
RP Klimo, P (reprint author), Med Grp 88th, 4881 Sugar Maple Dr, Wright Patterson AFB, OH 45431 USA.
EM paul.klimo@wpafb.af.mil
RI Ware, Marcus/E-4981-2011
NR 153
TC 17
Z9 17
U1 0
U2 2
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 1042-3680
J9 NEUROSURG CLIN N AM
JI Neurosurg. Clin. N. Am.
PD OCT
PY 2007
VL 18
IS 4
BP 599
EP +
DI 10.1016/j.nec.2007.09.004
PG 23
WC Clinical Neurology; Surgery
SC Neurosciences & Neurology; Surgery
GA 237HO
UT WOS:000251365000004
PM 17991586
ER
PT J
AU Olsen, TG
Barnes, AA
King, JA
AF Olsen, Tandy G.
Barnes, Amy A.
King, Jeremy A.
TI Elevated hCG outside of pregnancy - Diagnostic considerations and
laboratory evaluation
SO OBSTETRICAL & GYNECOLOGICAL SURVEY
LA English
DT Article
ID HUMAN CHORIONIC-GONADOTROPIN; FREE BETA-SUBUNIT; GESTATIONAL
TROPHOBLASTIC DISEASES; HUMAN PITUITARY; SERUM-LEVELS; RELIABLE MARKER;
WOMEN; MANAGEMENT; RADIOIMMUNOASSAY; SECRETION
AB Human chorionic gonadotropin (hCG) is a glycoprotein hormone produced by trophoblastic tissues, and its identification is frequently relied upon to establish the diagnosis of pregnancy. Entities other than pregnancy, such as false-positive hCG results, pituitary hCG, exogenous hCG, and both trophoblastic and nontrophoblastic neoplasias, can also cause laboratory assays for hCG to show positive results. Because of their rarity, these conditions are not commonly recognized, and the steps to differentiate between them are not widely known. Discriminating between the causes of elevated hCG in nonpregnant patients can be confusing. An understanding of the differential diagnosis and awareness of available diagnostic modalities are essential for accurate diagnosis and avoidance of potentially harmful treatments.
Target Audience: Obstetricians & Gynecologists, Family Physicians
Learning Objectives: After completion of this article, the reader should be able to state the importance of types of human chorionic gonadotropin (hCG), recall their presence in both trophoblastic and nontrophoblastic neoplasias, and explain how important it is to distinguish between the various causes of an elevated serum hCG to avoid harmful treatments.
C1 Uniformed Serv Univ Hlth Sci, Dept Obstet & Gynecol, Bethesda, MD 20814 USA.
Uniformed Serv Hlth Educ Consortium, Dept Obstet & Gynecol, San Antonio, TX USA.
Uniformed Serv Hlth Educ Consortium, Dept Reprod Endocrinol & Infertil, San Antonio, TX USA.
RP Olsen, TG (reprint author), 2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA.
EM tandyolsen@hotmail.com
NR 27
TC 6
Z9 6
U1 1
U2 3
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0029-7828
J9 OBSTET GYNECOL SURV
JI Obstet. Gynecol. Surv.
PD OCT
PY 2007
VL 62
IS 10
BP 669
EP 674
PG 6
WC Obstetrics & Gynecology
SC Obstetrics & Gynecology
GA 215ML
UT WOS:000249812600001
PM 17868485
ER
PT J
AU Kontur, FJ
Dajani, I
Lu, YL
Knize, RJ
AF Kontur, F. J.
Dajani, I.
Lu, Yalin
Knize, R. J.
TI Frequency-doubling of a CW fiber laser using PPKTP, PPMgSLT, and PPMgLN
SO OPTICS EXPRESS
LA English
DT Article
ID GREEN-LIGHT GENERATION; CRYSTALS; POWER
AB Second-harmonic generation (SHG) in PPKTP, PPMgSLT, and PPMgLN crystals is analyzed by frequency-doubling CW light from a 1064 nm fiber laser over a range of powers up to 10 W. Data for fundamental powers less than 3 W is used to determine the effects of the fundamental laser linewidth on SHG and to identify imperfections in the periodicity and boundary sharpness of the crystals' poled domains which can reduce SHG. Data for fundamental powers greater than 3 W is used to diagnose and model limiting effects on SHG such as pump depletion and thermal dephasing. Thermal dephasing was found to reduce second-harmonic power by 25% or more for input fundamental powers approaching 10 W. (c) 2007 Optical Society of America.
C1 USAF Acad, Dept Phys, Laser & Opt Res Ctr, Colorado Springs, CO 80840 USA.
RP Kontur, FJ (reprint author), USAF Acad, Dept Phys, Laser & Opt Res Ctr, 2354 Fairchild Dr,Ste 2A31, Colorado Springs, CO 80840 USA.
EM frederick.kontur.ctr@usafa.af.mil
OI Kontur, Frederick/0000-0002-8802-5653
NR 13
TC 38
Z9 43
U1 0
U2 3
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD OCT 1
PY 2007
VL 15
IS 20
BP 12882
EP 12889
DI 10.1364/OE.15.012882
PG 8
WC Optics
SC Optics
GA 218HN
UT WOS:000250006700033
PM 19550556
ER
PT J
AU Nesselroad, TD
AF Nesselroad, Teresa D.
TI Concerns for food allergen intradermal skin testing in nasal polyposis
patients
SO OTOLARYNGOLOGY-HEAD AND NECK SURGERY
LA English
DT Letter
ID DIAGNOSIS
C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
RP Nesselroad, TD (reprint author), 655 7th St, Robins AFB, GA 31098 USA.
EM teresa.nesselroad@robins.af.mil
NR 6
TC 1
Z9 1
U1 0
U2 0
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0194-5998
J9 OTOLARYNG HEAD NECK
JI Otolaryngol. Head Neck Surg.
PD OCT
PY 2007
VL 137
IS 4
BP 692
EP 693
DI 10.1016/j.otohns.2007.05.015
PG 2
WC Otorhinolaryngology; Surgery
SC Otorhinolaryngology; Surgery
GA 218MO
UT WOS:000250019800038
PM 17903601
ER
PT J
AU Alsing, PM
Cardimona, DA
Huang, DH
AF Alsing, P. M.
Cardimona, D. A.
Huang, D. H.
TI Quantum interference near a photonic band edge beyond the weak-field
approximation
SO PHYSICAL REVIEW A
LA English
DT Article
ID ELECTROMAGNETICALLY INDUCED TRANSPARENCY; SPONTANEOUS EMISSION; GAP;
SUPERRADIANCE; FLUCTUATIONS; OPTICS
AB We investigate spontaneous emission and quantum interference effects involving a three-level atom in the vicinity of a photonic band edge beyond the weak-driving-field approximation. We consider two different three-level atoms, each subject to a probe field from the ground state and each embedded within a different photonic crystal (PhC). The first atom has the two excited states separated by a dipole transition in the optical frequency range, with this frequency being close to the surrounding PhC's band edge. The probe field couples the ground state and the highest excited state, and is well outside the PhC band gap. If a coupling field is applied between the two upper levels, electromagnetically induced transparency (EIT) may occur, depending on the position of the band edge. The second atom has the two upper levels each dipole-coupled to the ground state and close enough that the emissions from each can coherently interfere. This atom is embedded within a PhC whose band edge lies near the lower of the two excited states, and a probe field is applied that lies just beyond this band edge. This atom exhibits a quantum interference phenomenon related to EIT called field-induced transparency, again depending on the position of the band edge relative to the lower excited state.
C1 [Alsing, P. M.; Cardimona, D. A.; Huang, D. H.] USAF, Res Lab, Space Vehicle Directorate, Kirtland AFB, NM 87117 USA.
RP Alsing, PM (reprint author), USAF, Res Lab, Space Vehicle Directorate, 3550 Aberdeen Ave, Kirtland AFB, NM 87117 USA.
EM paul.alsing@kirtland.af.mil; dave.cardimona@kirtland.af.mil;
danhong.huang@kirtland.af.mil
NR 18
TC 5
Z9 5
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD OCT
PY 2007
VL 76
IS 4
AR 043802
DI 10.1103/PhysRevA.76.043802
PG 14
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 226WR
UT WOS:000250619700171
ER
PT J
AU Tuomisto, F
Ranki, V
Look, DC
Farlow, GC
AF Tuomisto, F.
Ranki, V.
Look, D. C.
Farlow, G. C.
TI Introduction and recovery of Ga and N sublattice defects in
electron-irradiated GaN
SO PHYSICAL REVIEW B
LA English
DT Article
ID VAPOR-PHASE-EPITAXY; BULK-LIKE GAN; VACANCIES; ACCEPTORS; CRYSTALS;
DONOR
AB We have used positron annihilation spectroscopy to study the introduction and recovery of point defects introduced by 0.45 and 2 MeV electron irradiation at room temperature in n-type GaN. Isochronal annealings were performed up to 1220 K. We observe vacancy defects with specific lifetime of tau(V)=190 +/- 15 ps that we tentatively identify as N vacancies or related complexes in the neutral charge state in the samples irradiated with 0.45 MeV electrons. The N vacancies are produced at a rate Sigma(0.45)(N)similar or equal to 0.25 cm(-1). The irradiation with 2 MeV electrons produces negatively charged Ga vacancies and negative nonopen volume defects (negative ions) originating from the Ga sublattice, at a rate Sigma(2.0)(Ga)similar or equal to 5 cm(-1). The irradiation-induced N vacancies anneal out of the samples at around 600 K, possibly due to the motion of the irradiation-induced N interstitials. Half of the irradiation-induced Ga vacancies anneal out of the samples also around 600 K, and this is interpreted as the isolated Ga vacancies becoming mobile with a migration barrier of E(M)(V,Ga)=1.8 +/- 0.1 eV. Interestingly, we observe a change of charge state of the irradiation-induced negative ions from 2- to 1- likely due to a reconstruction of the defects in two stages at annealing temperatures of about 600 and 700 K. The negative ions anneal out of the samples together with the other half of the Ga vacancies (stabilized by, e.g., N vacancies and/or hydrogen) in thermal annealings at 800-1100 K.
C1 [Tuomisto, F.; Ranki, V.] Helsinki Univ Technol, Phys Lab, FIN-02015 Helsinki, Finland.
Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Farlow, G. C.] Wright State Univ, Dept Phys, Dayton, OH 45435 USA.
RP Tuomisto, F (reprint author), Helsinki Univ Technol, Phys Lab, PO Box 1100, FIN-02015 Helsinki, Finland.
RI Tuomisto, Filip/B-8189-2008
OI Tuomisto, Filip/0000-0002-6913-5654
NR 30
TC 49
Z9 51
U1 2
U2 18
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 OCT
PY 2007
VL 76
IS 16
AR 165207
DI 10.1103/PhysRevB.76.165207
PG 10
WC Physics, Condensed Matter
SC Physics
GA 226XA
UT WOS:000250620600061
ER
PT J
AU Wang, X
Pan, E
Albrecht, JD
AF Wang, X.
Pan, E.
Albrecht, J. D.
TI Anisotropic elasticity of multilayered crystals deformed by a biperiodic
network of misfit dislocations
SO PHYSICAL REVIEW B
LA English
DT Article
ID PIEZOELECTRIC SOLIDS; GREENS-FUNCTIONS; HALF-SPACES; FIELD;
SUPERLATTICES; COMPOSITES; BICRYSTAL; FRACTURE; ARRAY
AB We investigate the displacement and stress fields associated with a biperiodic misfit dislocation network located along a single interface in a multilayered crystal composite of (N-1) thin bonded anisotropic elastic layers sandwiched between two semi-infinite anisotropic media. Specifically, dislocation networks of coplanar, biperiodic, hexagonal-based linear misfit are considered within continuum elasticity theory. While the homogeneous solutions are obtained by using the double Fourier series and the Stroh formalism, the solutions for multilayered structures are expressed in terms of a transfer matrix technique and the generalized Barnett-Lothe tensors. The transfer matrix technique lends itself to composites containing large numbers of bonded crystal layers because only a 3x3 matrix inversion is required. The use of the generalized Barnett-Lothe tensor facilitates the treatment of inherent elastic anisotropy in the constituent crystals. The correctness and the versatility of the method are illustrated by calculating the stress field associated with a multilayer formed by alternating GaAs and Si layers (N=5) containing a single array of edge misfit dislocations along one interface. To further demonstrate the influence of the material anisotropy, numerical examples for the misfit dislocation induced stresses are given for the (N=5) multilayered structure (formed by GaAs and Si) and for the induced surface displacements for an InAs thin film over a GaAs substrate. Both cubic and simplified isotropic materials are considered.
C1 [Wang, X.; Pan, E.] Univ Akron, Dept Appl Math, Dept Engn, Akron, OH 44325 USA.
[Albrecht, J. D.] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Wang, X (reprint author), Univ Akron, Dept Appl Math, Dept Engn, Akron, OH 44325 USA.
RI Pan, Ernian/F-4504-2011
OI Pan, Ernian/0000-0001-6640-7805
NR 27
TC 6
Z9 6
U1 1
U2 4
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 OCT
PY 2007
VL 76
IS 13
AR 134112
DI 10.1103/PhysRevB.76.134112
PG 9
WC Physics, Condensed Matter
SC Physics
GA 226WS
UT WOS:000250619800041
ER
PT J
AU Lilly, TC
Duncan, JA
Nothnagel, SL
Gimelshein, SF
Gimelshein, NE
Ketsdever, AD
Wysong, IJ
AF Lilly, T. C.
Duncan, J. A.
Nothnagel, S. L.
Gimelshein, S. F.
Gimelshein, N. E.
Ketsdever, A. D.
Wysong, I. J.
TI Numerical and experimental investigation of microchannel flows with
rough surfaces
SO PHYSICS OF FLUIDS
LA English
DT Article
ID MONTE-CARLO METHOD; GAS-FLOW; SCATTERING KERNEL; HEAT-TRANSFER;
SIMULATION
AB A conical surface roughness model applicable to particle simulations has been developed. The model has been experimentally validated for channel flows using helium and nitrogen gases at Reynolds numbers from 0.01 to 10 based on inlet conditions. To efficiently simulate gas-surface interaction, molecular collisions with the actual rough surface are simulated by collisions with a randomly positioned conical hole having a fixed opening angle. This model requires only one surface parameter, average surface roughness angle. This model has also been linked to the Cercignani-Lampis scattering kernel as a required reference for use in deterministic kinetic solvers. Experiments were conducted on transitional flows through a 150 mu m tall, 1 cm wide, 1.5 cm long microchannel where the mean free path is on the order of the roughness size. The channel walls were made of silicon with: (i) polished smooth surfaces, (ii) regular triangular roughness, and (iii) regular square roughness with characteristic roughness scales of < 1 mu m, 11 mu m, and 29 mu m, respectively. For the triangular roughness, mass flow reductions ranged from 6% at the higher stagnation pressures tested to 25% at the lower stagnation pressures tested when compared to the smooth channel. (C) 2007 American Institute of Physics.
C1 Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA.
ERC Inc, Edwards Air Force Base, Edwards AFB, CA 93524 USA.
Propuls Directorate, Air Force Res Lab, Edwards AFB, CA 93524 USA.
RP Lilly, TC (reprint author), 854 E 36th Pl RRB 101, Los Angeles, CA 90089 USA.
EM tlilly@usc.edu
RI Wysong, Ingrid/E-6592-2011
OI Wysong, Ingrid/0000-0003-0591-6862
NR 27
TC 19
Z9 19
U1 0
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-6631
J9 PHYS FLUIDS
JI Phys. Fluids
PD OCT
PY 2007
VL 19
IS 10
AR 106101
DI 10.1063/1.2775977
PG 9
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 226LC
UT WOS:000250589600054
ER
PT J
AU Sarosi, PM
Wang, B
Simmons, JP
Wang, Y
Mills, MJ
AF Sarosi, P. M.
Wang, B.
Simmons, J. P.
Wang, Y.
Mills, M. J.
TI Formation of multimodal size distributions of gamma ' in a nickel-base
superalloy during interrupted continuous cooling
SO SCRIPTA MATERIALIA
LA English
DT Article
DE superalloy; cooling; phase-field; nickel; nucleation
ID PRECIPITATION
AB This paper reports an investigation, both experimental and via computer simulation, of a nickel-based superalloy in order to study how different single cooling profiles affect microstructural development of gamma' during linear cooling and subsequent quenching at different interrupt-temperatures. The air-quench rates used in this study only demonstrate the concept of affecting microstructures via single-staae cooling with two cooling-rate regimes and are not likely to prove viable thermal processes for current commercial heat treatments. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 Ohio State Univ, Columbus, OH 43210 USA.
Wright Patterson AFB, Wright Patterson AFB, OH 45433 USA.
RP Sarosi, PM (reprint author), Ohio State Univ, Columbus, OH 43210 USA.
EM sarosi@matsceg.ohio-state.edu
RI Wang, Yunzhi/B-2557-2010
NR 19
TC 35
Z9 36
U1 2
U2 14
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD OCT
PY 2007
VL 57
IS 8
BP 767
EP 770
DI 10.1016/j.scriptamat.2007.06.014
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 203UO
UT WOS:000248999700026
ER
PT J
AU Ullrich, B
Munshi, SR
Brown, GJ
AF Ullrich, B.
Munshi, S. R.
Brown, G. J.
TI Photoluminescence analysis of p-doped GaAs using the Roosbroeck-Shockley
relation
SO SEMICONDUCTOR SCIENCE AND TECHNOLOGY
LA English
DT Article
ID TEMPERATURE-DEPENDENCE; SINGLE-PHOTON; N-TYPE; GAP; ABSORPTION;
EMISSION; LUMINESCENCE; DEPOSITION
AB Linking absorption with emission, the Roosbroeck-Shockley relation (RSR) expresses a fundamental principle of semiconductor optics. Despite its elementary character, the RSR is hardly advocated since it is commonly understood that the relation holds for intrinsic materials only. However, we demonstrate that the RSR reproduces very well the photoluminescence of p-doped GaAs over the temperature range of 5-300 K. The fitting parameters used, such as energy position and doping-induced band gap shrinkage, satisfactorily coincide with the literature. The presented results show that the RSR can have a much broader impact in semiconductor analysis than generally presumed.
C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Ullrich, B (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
NR 20
TC 10
Z9 10
U1 1
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0268-1242
J9 SEMICOND SCI TECH
JI Semicond. Sci. Technol.
PD OCT
PY 2007
VL 22
IS 10
BP 1174
EP 1177
DI 10.1088/0268-1242/22/10/016
PG 4
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Condensed Matter
SC Engineering; Materials Science; Physics
GA 214RO
UT WOS:000249756000016
ER
PT J
AU Usak, P
Polak, M
Kvitkovic, J
Levin, GA
Barnes, PN
AF Usak, P.
Polak, M.
Kvitkovic, J.
Levin, G. A.
Barnes, P. N.
TI The current distribution in a striated YBCO tape subjected to both a
magnetization and a transport current
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
ID AC CURRENT DISTRIBUTIONS; FAULT CURRENT LIMITER; PICKUP COIL METHOD;
CURRENT-DENSITY; THIN-FILMS; SUPERCONDUCTING TAPES; COATED CONDUCTORS;
BI-2223/AG TAPES; LOSS REDUCTION; FIELD
AB In this work we have quantified the results concerning the current distribution and the values of the full magnetization current If during a complete cycle of an externally applied magnetic field, B-ext. A YBa2Cu3O7-x-coated conductor in the form of a striated tape 12 mm wide and 100 mm long, with unstriated ends, was exposed to a gradually changing external magnetic field. For every selected phase of the initial cycle of the magnetic field ( first cycle after cool-down), the perpendicular component of the self-field profile over the center of the tape was measured. The Tikhonov method of regularization was used in the inverse calculation of the current distribution. For every quarter of the cycle the magnetization current distribution profiles corresponding to different levels of gradually changing external magnetic field Bext were plotted. After finishing the whole cycle, the external magnetic field was eliminated upon returning to a zero level and the gradual ramping of a transport current was commenced. The change in current distribution because of the increasing transport current took place only in the non-saturated half-width of the tape current profile.
C1 Slovak Acad Sci, Inst Elect Engn, Bratislava 84104, Slovakia.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Usak, P (reprint author), Slovak Acad Sci, Inst Elect Engn, Dubravska Cesta 9, Bratislava 84104, Slovakia.
EM Pavol.Usak@savba.sk
NR 37
TC 4
Z9 4
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD OCT
PY 2007
VL 20
IS 10
BP 994
EP 1001
DI 10.1088/0953-2048/20/10/018
PG 8
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 212KY
UT WOS:000249596400021
ER
PT J
AU Varanasi, CV
Barnes, PN
Burke, J
AF Varanasi, C. V.
Barnes, P. N.
Burke, J.
TI Enhanced flux pinning force and uniquely shaped flux pinning force plots
observed in YBa2Cu3O7-x films with BaSnO3 nanoparticles
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
ID T-C SUPERCONDUCTORS; COATED CONDUCTORS; MECHANISMS; DEPOSITION; DEFECTS;
DENSITY
AB We demonstrate that the maximum of the bulk pinning force (F-p, max) of YBCO films with BaSnO3 nanoparticles (YBCO + BSO) can be more than twice the value of Fp, max of regular YBCO films of similar thickness at 77 or 65 K. Also, in YBCO + BSO films, the position of the F-p, max is shifted to higher fields occurring at more than 4 T at 77 K, as opposed to typical 1.5 - 2 T in good-quality YBCO films. Further, we show that a unique, distinguishable dual-peak structure in F-p versus H plots in YBCO + BSO samples can exist, possibly due to the presence of simultaneously operative dual pinning mechanisms.
C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA.
USAF, Res Lab AFRL, Wright Patterson AFB, OH 45433 USA.
RP Varanasi, CV (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
NR 28
TC 25
Z9 25
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD OCT
PY 2007
VL 20
IS 10
BP 1071
EP 1075
DI 10.1088/0953-2048/20/10/029
PG 5
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 212KY
UT WOS:000249596400032
ER
PT J
AU Ellason, JL
Clouse, WD
AF Ellason, Jonathan L.
Clouse, W. Darrin
TI Current management of infrarenal abdominal aortic aneurysms
SO SURGICAL CLINICS OF NORTH AMERICA
LA English
DT Article
ID RANDOMIZED CONTROLLED-TRIAL; ENDOVASCULAR TREATMENT; CLINICAL-TRIAL;
OPEN REPAIR; SURVEILLANCE; SURGERY; TERM; EXPERIENCE; ENDOGRAFTS;
MIGRATION
AB Since the concept of endovascular aneurysm repair (EVAR) was introduced more than 15 years ago, many technological advances and multiple generations of aortic stent-graft devices have been used to manage infrarenal abdominal aortic aneurysms. In this rapidly changing environment, the determination of the optimal management of patients with aneurysmal disease can be difficult. In this article, the current management of infrarenal abdominal aortic aneurysms is outlined. Consistent data revealing short-term advantages in morbidity and mortality make EVAR a very appealing option for practitioners and patients. However, mid-and long-term data proving an all-cause mortality benefit are lacking. Open repair has proven durability, and should be strongly considered in younger and lower-risk patients.
C1 [Ellason, Jonathan L.] Univ Michigan Hlth Syst, Dept Surg, Vasc Surg Sect, Ann Arbor, MI 48109 USA.
[Clouse, W. Darrin] Wilford Hall USAF Med Ctr, Div Vasc, Lackland AFB, TX 78236 USA.
[Clouse, W. Darrin] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
RP Ellason, JL (reprint author), Univ Michigan Hlth Syst, Dept Surg, Vasc Surg Sect, CVC 5463,1500 E Med Ctr Dr,SPC 5867, Ann Arbor, MI 48109 USA.
EM jonaelia@med.umich.edu
NR 38
TC 1
Z9 1
U1 0
U2 0
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 0039-6109
J9 SURG CLIN N AM
JI Surg. Clin.-North Am.
PD OCT
PY 2007
VL 87
IS 5
BP 1017
EP +
DI 10.1016/j.sue.2007.08.002
PG 18
WC Surgery
SC Surgery
GA 249ES
UT WOS:000252210700005
ER
PT J
AU Toner, C
AF Toner, Christopher
TI Was Aquinas an egoist? (Aristotle and Aquinas)
SO THOMIST
LA English
DT Article
ID VIRTUE ETHICS
C1 USAF Acad, USAF Acad, CO 80840 USA.
RP Toner, C (reprint author), USAF Acad, USAF Acad, CO 80840 USA.
NR 17
TC 3
Z9 3
U1 0
U2 0
PU THOMIST PRESS
PI WASHINGTON
PA 487 MICHIGAN AVE NE, WASHINGTON, DC 20017 USA
SN 0040-6325
J9 THOMIST
JI Thomist
PD OCT
PY 2007
VL 71
IS 4
BP 577
EP 608
PG 32
WC Philosophy; Religion
SC Philosophy; Religion
GA 263PJ
UT WOS:000253228700004
ER
PT J
AU Lee, H
Mall, S
Murray, KN
AF Lee, Hyukjae
Mall, Shankar
Murray, Karl N.
TI Fretting wear behavior of cu-al coating on Ti-6Al-4V substrate under dry
and wet (lubricated) contact condition
SO TRIBOLOGY LETTERS
LA English
DT Article
DE coating; Cu-Al; wear; fretting; dissipated energy; relative displacement
ID ENERGY DESCRIPTION; FATIGUE; MECHANISMS
AB The fretting wear behavior of Cu-Al coating was investigated with and without fatigue load under the dry and wet (lubricated) contact conditions. The Cu-Al coating was plasma deposited on titanium alloy, Ti-6Al-4V. Fretting regime was determined from the shape of fretting hysteresis loop. Fretting regime changed from partial slip to total (gross) slip at similar to 15 mu m of the applied relative displacement, and this transition point was independent of fatigue loading and contact surface (lubricated versus dry) conditions. Wet contact condition reduced frictional force during cycling, as evidenced by the lower-tangential force. Wear analysis using the accumulated dissipated energy approach did not show any effect of contact surface condition. In other words, the relationship between the accumulated dissipated energy and wear volume showed a linear relationship, and it was independent of loading and contact surface conditions, as well as of the fretting regime. Further, the relationship between the wear depth and accumulated dissipated energy did not show any effect of loading and contact surface conditions, as well as of the fretting regime up to instant when the maximum wear depth was equal to the coating thickness.
C1 USAF, Inst Technol, ENY, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
Andong Natl Univ, Sch Adv Mat Engn, Andong 760749, Gyungbuk, South Korea.
RP Mall, S (reprint author), USAF, Inst Technol, ENY, Dept Aeronaut & Astronaut, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Shankar.Mall@afit.edu
NR 17
TC 11
Z9 11
U1 4
U2 13
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1023-8883
J9 TRIBOL LETT
JI Tribol. Lett.
PD OCT
PY 2007
VL 28
IS 1
BP 19
EP 25
DI 10.1007/s11249-007-9243-8
PG 7
WC Engineering, Chemical; Engineering, Mechanical
SC Engineering
GA 202ZJ
UT WOS:000248943500003
ER
PT J
AU Jin, O
Mall, S
Hager, CH
AF Jin, O.
Mall, S.
Hager, C. H., Jr.
TI Fretting fatigue Behavior of cu-al-coated Ti-6AI-4V
SO TRIBOLOGY TRANSACTIONS
LA English
DT Article; Proceedings Paper
CT Joint Tribology Conference of the
American-Society-of-Mechanical-Engineers/Society-of-Tribologists-and-Lub
rication-Engineers
CY OCT 24-27, 2004
CL Long Beach, CA
SP Amer Soc Mech Engineers, Soc Tribologists & Lubricat Engineers
DE fretting fatigue; cu-a1 coatings; friction; delamination; aviation gas
turbine engines
ID INDEPENDENT PAD DISPLACEMENT; CONTACT PRESSURE; TI-6AL-4V; COATINGS;
WEAR; AMPLITUDE; TITANIUM; RESISTANCE; INITIATION; SUBSTRATE
AB Fretting fatigue of a Cu-Al coating deposited on an aluminagritted Ti-6Al-4V substrate was investigated. Two types of tests were conducted: one series involved fretting fatigue tests at different bulk stress amplitudes under a constant contact load and the second series was run at different contact loads under a constant bulk stress amplitude. The coefficient of friction (COF) was lower on the coated substrate than on the bare substrate before fretting. However, COFs of the coated and the bare (i.e., uncoated) substrates were identical after the exposure to fretting fatigue cycles since fretting fatigue caused wear of the coating. The coating thickness as a function of fretting fatigue cycles was monitored. The coating damage increased as the applied bulk stress amplitude increased. At lower bulk stress amplitudes, the coating damage was gradual and it survived over one million cycles. However, the coating delaminated from the gritted surface and/or caused premature specimen failure at higher stress amplitudes. At the lowest contact load used in the present study, the contact condition was gross slip and the life of the coating was the shortest due to fretting wear. On the other hand, the higher contact loads induced a partial slip contact condition that caused less coating damage, and the coating life increased with increasing contact load.
C1 Mercer Univ, Dept Mech & Ind Engn, Macon, GA 31207 USA.
AF Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH USA.
Mat & Mfg Directorate, AF Res Lab, Wright Patterson AFB, OH USA.
Universal Technol Corp, Dayton, OH 45432 USA.
RP Jin, O (reprint author), Mercer Univ, Dept Mech & Ind Engn, Macon, GA 31207 USA.
NR 25
TC 4
Z9 4
U1 1
U2 6
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1040-2004
J9 TRIBOL T
JI Tribol. Trans.
PD OCT-DEC
PY 2007
VL 50
IS 4
BP 497
EP 506
DI 10.1080/10402000701613393
PG 10
WC Engineering, Mechanical
SC Engineering
GA 227VA
UT WOS:000250684700007
ER
PT J
AU Coster, AJ
Colerico, MJ
Foster, JC
Rideout, W
Rich, F
AF Coster, A. J.
Colerico, M. J.
Foster, J. C.
Rideout, W.
Rich, F.
TI Longitude sector comparisons of storm enhanced density
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID SUBAURORAL POLARIZATION STREAM; IONOSPHERIC SIGNATURES; ELECTRIC
POTENTIALS; ART.; GRADIENTS; MODEL
AB [1] Examples of storm enhanced density ( SED) formation over Russia and Northern Europe are presented. These events, which persisted 15-20 hours, were fixed in local time near noon over Europe and then later observed over the American sector. The amount of total electron content ( TEC) at the base of the SED erosion plume is found to be greatest in the American sector. A persistent, repeatable pattern is apparent in the time evolution of the latitude location of the SED plume base, although the latitudinal rate of change differs between the two sectors. In the European sector the invariant latitude (Lambda) of the SED plume base is observed to be between 61 degrees-63 degrees Lambda and at a time close to local noon. In the American sector, the position of the base of the plume shifts from local noon towards dusk, and moves to a lower latitude at a nearly fixed longitude.
C1 MIT, Haystack Observ, Westford, MA 01886 USA.
Atmospher & Environm Res Inc, Lexington, MA USA.
AF Res Lab, Hanscom AFB, Wright Patterson AFB, OH 45433 USA.
RP Coster, AJ (reprint author), MIT, Haystack Observ, Westford, MA 01886 USA.
EM ajc@haystack.mit.edu
NR 24
TC 23
Z9 24
U1 0
U2 2
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 SEP 27
PY 2007
VL 34
IS 18
AR L18105
DI 10.1029/2007GL030682
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 216AU
UT WOS:000249850900004
ER
PT J
AU Lodes, MJ
Suciu, D
Wilmoth, JL
Ross, M
Munro, S
Dix, K
Bernards, K
Stover, AG
Quintana, M
Iihoshi, N
Lyon, WJ
Danley, DL
McShea, A
AF Lodes, Michael J.
Suciu, Dominic
Wilmoth, Jodi L.
Ross, Marty
Munro, Sandra
Dix, Kim
Bernards, Karen
Stoever, Axel G.
Quintana, Miguel
Iihoshi, Naomi
Lyon, Wanda J.
Danley, David L.
McShea, Andrew
TI Identification of Upper Respiratory Tract Pathogens Using
Electrochemical Detection on an Oligonucleotide Microarray
SO PLOS ONE
LA English
DT Article
AB Bacterial and viral upper respiratory infections (URI) produce highly variable clinical symptoms that cannot be used to identify the etiologic agent. Proper treatment, however, depends on correct identification of the pathogen involved as antibiotics provide little or no benefit with viral infections. Here we describe a rapid and sensitive genotyping assay and microarray for URI identification using standard amplification and hybridization techniques, with electrochemical detection (ECD) on a semiconductor-based oligonucleotide microarray. The assay was developed to detect four bacterial pathogens (Bordetella pertussis, Streptococcus pyogenes, Chlamydia pneumoniae and Mycoplasma pneumoniae) and 9 viral pathogens (adenovirus 4, coronavirus OC43, 229E and HK, influenza A and B, parainfluinza types 1, 2, and 3 and respiratory syncytial virus. This new platform forms the basis for a fully automated diagnostics system that is very flexible and can be customized to suit different or additional pathogens. Multiple probes on a flexible platform allow one to test probes empirically and then select highly reactive probes for further iterative evaluation. Because ECD uses an enzymatic reaction to create electrical signals that can be read directly from the array, there is no need for image analysis or for expensive and delicate optical scanning equipment. We show assay sensitivity and specificity that are excellent for a multiplexed format.
C1 [Lodes, Michael J.; Suciu, Dominic; Wilmoth, Jodi L.; Ross, Marty; Munro, Sandra; Dix, Kim; Bernards, Karen; Stoever, Axel G.; Danley, David L.; McShea, Andrew] CombiMatrix Corp, Mukilteo, WA USA.
[Quintana, Miguel; Iihoshi, Naomi] USA, Ctr Hlth Promot & Prevent Med W, Ft Lewis, WA USA.
[Lyon, Wanda J.] USAF, Res Lab, Human Effectiveness Directorate, Appl Biotechnol Branch, Wright Patterson AFB, OH 45433 USA.
RP Lodes, MJ (reprint author), CombiMatrix Corp, Mukilteo, WA USA.
EM mlodes@combimatrix.com
FU CombiMatrix Corporation
FX This is a research and development project funded by CombiMatrix
Corporation (MJL, DS, JLW, AGS, MR, SM, KD, KB, DLD, and AM). MQ and NI
are employees of CHPPM-West at Fort Lewis, Washington and WJL is an
employee of the US Air Force Research Laboratory, Wright-Patterson AFB,
OH.
NR 44
TC 37
Z9 39
U1 1
U2 16
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD SEP 26
PY 2007
VL 2
IS 9
AR e924
DI 10.1371/journal.pone.0000924
PG 13
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA V10HT
UT WOS:000207455800004
PM 17895966
ER
PT J
AU Bunker, CE
Novak, KC
Guliants, EA
Harruff, BA
Meziani, MJ
Lin, Y
Sun, YP
AF Bunker, Christopher E.
Novak, Kyle C.
Guliants, Elena A.
Harruff, Barbara A.
Meziani, M. Jaouad
Lin, Yi
Sun, Ya-Ping
TI Formation of protein-metal oxide nanostructures by the sonochemical
method: Observation of nanofibers and nanoneedles
SO LANGMUIR
LA English
DT Article
ID BOVINE SERUM-ALBUMIN; NANOPARTICLES; CARBONYLS; MICROSPHERES;
TEMPERATURE; CAVITATION; SONOLUMINESCENCE; NANOCOMPOSITES;
SONOCATALYSIS; DECOMPOSITION
AB The sonochemical reaction of iron pentacarbonyl is explored in water and in water with the protein BSA (bovine serum albumen). In water, the reaction is found to produce spherical nanoparticles of magnetite (Fe(3)O(4)) with a particle size distribution of < 10 to similar to 60 nm. In water with BSA, the reaction produces either nanofibers or nanoneedles, depending on the concentration of BSA. The nanofiber and nanoneedle samples are found to be mixtures of goethite, lepidocrocite, and hematite (alpha-FeOOH, gamma-FeOOH, and alpha-Fe(2)O(3), respectively). The sonochemical reaction of iron pentacarbonyl with BSA in water is thought to proceed through the thermal decomposition mechanism for iron pentacarbonyl with BSA acting as a templating agent.
C1 USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
Univ Dayton, Inst Res, Nonmet Mat Div, Dayton, OH 45469 USA.
Clemson Univ, Dept Chem, Howard L Hunter Chem Lab, Clemson, SC 29634 USA.
RP Bunker, CE (reprint author), USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
NR 58
TC 6
Z9 6
U1 0
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD SEP 25
PY 2007
VL 23
IS 20
BP 10342
EP 10347
DI 10.1021/la7013682
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 211YL
UT WOS:000249560100056
PM 17713934
ER
PT J
AU Fan, L
Hessenius, C
Fallahi, M
Hader, J
Li, H
Moloney, JV
Stolz, W
Koch, SW
Murray, JT
Bedford, R
AF Fan, Li
Hessenius, Chris
Fallahi, Mahmoud
Hader, Joerg
Li, Hongbo
Moloney, Jerome V.
Stolz, Wolfgang
Koch, Stephan W.
Murray, James T.
Bedford, Robert
TI Highly strained InGaAs/GaAs multiwatt vertical-external-cavity
surface-emitting laser emitting around 1170 nm
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SEMICONDUCTOR DISK LASER; YELLOW LASER; FREQUENCY; GENERATION; POWER
AB We develop and demonstrate a multiwatt highly strained InGaAs/GaAs vertical-external-cavity surface-emitting laser with a free lasing wavelength of around 1170 nm. This laser can be tuned from similar to 1147 to similar to 1197 nm. This low-cost compact wavelength agile laser can potentially provide high-power coherent light in a wide yellow-orange band by the intracavity frequency doubling. (C) 2007 American Institute of Physics.
C1 Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA.
Univ Arizona, Coll Opt Sci, Arizona Ctr Math Sci, Tucson, AZ 85721 USA.
Univ Marburg, Dept Phys, Ctr Mat Sci, D-35032 Marburg, Germany.
Arete Associates, Longmont, CO 80501 USA.
USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA.
RP Fan, L (reprint author), Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA.
EM lifan@optics.arizona.edu
NR 18
TC 42
Z9 42
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD SEP 24
PY 2007
VL 91
IS 13
AR 131114
DI 10.1063/1.2790838
PG 3
WC Physics, Applied
SC Physics
GA 215CX
UT WOS:000249787000014
ER
PT J
AU Maass, R
Van Petegem, S
Grolimund, D
Van Swygenhoven, H
Uchic, MD
AF Maass, R.
Van Petegem, S.
Grolimund, D.
Van Swygenhoven, H.
Uchic, M. D.
TI A strong micropillar containing a low angle grain boundary
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID CRYSTAL PLASTICITY; SIZE; DEFORMATION; STRENGTH; SCALE; AU
AB In situ white beam Laue diffraction experiments on focused ion beam machined single crystal 10 mu m Ni pillars are performed to explore the relation between the initial and evolving microstructures and the subsequent flow response. The pillar has a flow stress that is at least in the upper bound of the scatter of the flow stresses obtained for similar Ni pillars. Detailed analysis of the Laue pattern suggests that the strength is in part due to the low angle grain boundary acting as a dislocation barrier. (c) 2007 American Institute of Physics.
C1 ASQ, NUM Mat Sci & Simulat, Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Maass, R (reprint author), ASQ, NUM Mat Sci & Simulat, Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
EM helena.vs@psi.ch
RI Maass, Robert/F-6306-2011; Van Petegem, Steven/D-5908-2014; Van Petegem,
Steven/E-9807-2016
OI Van Petegem, Steven/0000-0002-3015-7725
NR 15
TC 19
Z9 20
U1 2
U2 18
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 SEP 24
PY 2007
VL 91
IS 13
AR 131909
DI 10.1063/1.2784938
PG 3
WC Physics, Applied
SC Physics
GA 215CX
UT WOS:000249787000032
ER
PT J
AU Kress, BT
Hudson, MK
Looper, MD
Albert, J
Lyon, JG
Goodrich, CC
AF Kress, B. T.
Hudson, M. K.
Looper, M. D.
Albert, J.
Lyon, J. G.
Goodrich, C. C.
TI Global MHD test particle simulations of > 10 MeV radiation belt
electrons during storm sudden commencement
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID MARCH 24; RELATIVISTIC ELECTRONS; DIFFUSION-COEFFICIENTS; GEOMAGNETIC
STORMS; PITCH ANGLE; 1991 SSC; MAGNETOSPHERE; ENERGY; ENERGIZATION;
ACCELERATION
AB Prior to 2003, there are two known cases where ultrarelativistic (greater than or similar to 10 MeV) electrons appeared in the Earth's inner zone radiation belts in association with high speed interplanetary shocks: the 24 March 1991 and the less well studied 21 February 1994 storms. During the March 1991 event electrons were injected well into the inner zone on a timescale of minutes, producing a new stably trapped radiation belt population that persisted for similar to 10 years. More recently, at the end of solar cycle 23, a number of violent geomagnetic disturbances resulted in large variations in ultrarelativistic electrons in the inner zone, indicating that these events are less rare than previously thought. Here we present results from a numerical study of shock-induced transport and energization of outer zone electrons in the 1-7 MeV range, resulting in a newly formed 10-20 MeV electron belt near L similar to 3. Test particle trajectories are followed in time-dependent fields from an MHD magnetospheric model simulation of the 29 October 2003 storm sudden commencement (SSC) driven by solar wind parameters measured at ACE. The newly formed belt is predominantly equatorially mirroring. This result is in part due to an SSC electric field pulse that is strongly peaked in the equatorial plane, preferentially accelerating equatorially mirroring particles. The timescale for subsequent pitch angle diffusion of the new belt, calculated using quasi-linear bounce-averaged diffusion coefficients, is in agreement with the observed delay in the appearance of peak fluxes at SAMPEX in low Earth orbit. We also present techniques for modeling radiation belt dynamics using test particle trajectories in MHD fields. Simulations are performed using code developed by the Center for Integrated Space Weather Modeling.
C1 Dartmouth Coll, Dept Phys & Astron, Wilder Lab 6127, Hanover, NH 03755 USA.
Aerosp Corp, Dept Space Sci, Los Angeles, CA 90009 USA.
Boston Univ, Ctr Integrated Space Weather Modeling, Boston, MA 02155 USA.
USAF, Space Vehicles Directorate, Res Lab, Hanscom AFB, MA 01731 USA.
RP Kress, BT (reprint author), Dartmouth Coll, Dept Phys & Astron, Wilder Lab 6127, Hanover, NH 03755 USA.
EM bkress@northstar.dartmouth.edu
OI Albert, Jay/0000-0001-9494-7630
NR 37
TC 42
Z9 44
U1 0
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD SEP 22
PY 2007
VL 112
IS A9
AR A09215
DI 10.1029/2006JA012218
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 213TP
UT WOS:000249690300004
ER
PT J
AU Howard, TA
Fry, CD
Johnston, JC
Webb, DF
AF Howard, T. A.
Fry, C. D.
Johnston, J. C.
Webb, D. F.
TI On the evolution of coronal mass ejections in the interplanetary medium
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE interplanetary medium; solar; terrestrial relations; solar wind; Sun :
coronal mass ejections (CMEs)
ID HELIOSPHERIC PLASMA SHEET; SOLAR-WIND DISTURBANCES; MAGNETIC CLOUDS;
IMAGER SMEI; GLOBAL PROPERTIES; SHOCK; EARTH; SUN; PROPAGATION;
SIMULATION
AB Two coronal mass ejections (CMEs) are presented which were tracked through the LASCO field of view (FOV) within 30 R-circle dot and later as interplanetary CMEs (ICMEs) through the SMEI FOV from 80 to 150 R-circle dot. They were also associated with erupting filaments observed by EIT, providing information on trajectory of propagation. This allowed three-dimensional reconstructions of CME/ICME geometry, along with corrected (not sky plane projected) measurements of distance-time (DT) plots for each event to similar to 0.5 AU. An investigation of morphology was conducted. The results suggest that fine structures of the CMEs are eroded by the solar wind, and curvature becomes more sharply convex outward, suggesting that ICME footpoints remain fixed to the Sun even at 0.5 AU. We also present two models describing the evolution of CMEs/ICMEs at large distances from the Sun (far from the launch mechanism and effects of gravity and solar pressure) and consider two drag models: aerodynamic drag and snowplow. There was little difference between these, and their DT profiles matched well with the SMEI data for event 1. Event 2 showed a net acceleration between the LASCO and SMEI FOVs and we could match the data for this event well by introducing a driving Lorentz force. ICME mass almost doubled as a result of swept-up solar wind material from the snowplow model. Finally, we compared the geometry and kinematics of the ICME with that produced by the HAFv2 model and found that the model reasonably matched the geometry, but overestimated the ICME speed.
C1 Montana State Univ, Dept Phys, Bozeman, MT 59715 USA.
Explorat Phys Int Inc, Huntsville, AL 35806 USA.
USAF, Res Lab, Space Weather Ctr Excellence, Space Vehicles Directorate, Bedford, MA 01731 USA.
Boston Coll, Inst Sci Res, Chestnut Hill, MA 02467 USA.
RP Howard, TA (reprint author), Montana State Univ, Dept Phys, Bozeman, MT 59715 USA.
EM thoward@solar.physics.montana.edu
NR 67
TC 59
Z9 60
U1 0
U2 4
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 SEP 20
PY 2007
VL 667
IS 1
BP 610
EP 625
DI 10.1086/519758
PN 1
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 210KU
UT WOS:000249455900054
ER
PT J
AU Tavakoli, B
Panah, MD
Javidi, B
Watson, E
AF Tavakoli, Behnoosh
Panah, Mehdi Danesh
Javidi, Bahram
Watson, Edward
TI Performance of 3D integral imaging with position uncertainty
SO OPTICS EXPRESS
LA English
DT Article
ID RESOLUTION LIMITATION; PHOTOGRAPHY; SYSTEM; DEPTH; RECOGNITION; ARRAYS;
SENSOR; FIELD
AB We present the theoretical and simulation results on the analysis of Synthetic Aperture Integral Imaging (SAII) technique and its sensitivity to pickup position uncertainty. SAII is a passive three dimensional imaging technique based on multiple image acquisitions with different perspective of the scene under incoherent or natural illumination. In practical SAII applications, there is always an uncertainty associated with the position at which each sensor captures the elemental image. We present a theoretical analysis that quantifies image degradation in terms of Mean Square Error (MSE) metric. Simulation results are also presented to identify the parameters affecting the reconstruction degradation and to confirm the analysis. We show that in SAII with a given uncertainty in the sensor locations, the high spatial frequency content of the 3D reconstructed images are most degraded. We also show an inverse relationship between the reconstruction distance and degradation metric. To the best of our knowledge, this is the first time that the effects of sensor position uncertainty on 3D computational reconstruction in synthetic aperture integral imaging systems have been quantitatively analyzed. (C) 2007 Optical Society of America.
C1 Univ Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Tavakoli, B (reprint author), Univ Connecticut, Dept Elect & Comp Engn, U-2157, Storrs, CT 06269 USA.
EM Bahram@engr.uconn.edu; Edward.Watson@wpafb.af.mil
NR 29
TC 17
Z9 17
U1 1
U2 6
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD SEP 17
PY 2007
VL 15
IS 19
BP 11889
EP 11902
DI 10.1364/OE.15.011889
PG 14
WC Optics
SC Optics
GA 218HK
UT WOS:000250006400015
PM 19547552
ER
PT J
AU Bandyopadhyay, A
Ray, AK
Sharma, AK
AF Bandyopadhyay, A.
Ray, A. K.
Sharma, A. K.
TI Use of DNA in the fabrication of solid state dye sensitized solar cells
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID TITANIA THIN-FILMS; POLYMER ELECTROLYTE
AB Double stranded calf-thymus deoxyribonucleic acid (DNA) and elementary adenine DNA base were employed as solid state electrolytes in a dye sensitized nanocrystalline titanium dioxide (TiO2) solar cell, where the sensitizing dye was Rose Bengal. Depending upon the type of the DNA used, the short circuit currents in the cells increases between 200% and 400%. The stability of adenine based devices was found to be higher than those made of calf-thymus DNAs. Thus self-refueling of solid-state dye-sensitized solar cells using DNA has been demonstrated.
C1 Indian Assoc Cultivat Sci, Dept Solid State Phys, Kolkata 700032, W Bengal, India.
Univ London, Nanotechnol Res Labs, Dept Mat, London E1 4NS, England.
USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
RP Bandyopadhyay, A (reprint author), Indian Assoc Cultivat Sci, Dept Solid State Phys, Kolkata 700032, W Bengal, India.
NR 27
TC 2
Z9 2
U1 0
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD SEP 15
PY 2007
VL 102
IS 6
AR 064508
DI 10.1063/1.2781472
PG 5
WC Physics, Applied
SC Physics
GA 215CZ
UT WOS:000249787200102
ER
PT J
AU Varanasi, CV
Burke, J
Brunke, L
Wang, H
Sumption, M
Barnes, PN
AF Varanasi, C. V.
Burke, J.
Brunke, L.
Wang, H.
Sumption, M.
Barnes, P. N.
TI Enhancement and angular dependence of transport critical current density
in pulsed laser deposited YBa2Cu3O7-x+BaSnO3 films in applied magnetic
fields
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID COATED CONDUCTORS; THIN-FILMS; YBA2CU3O7-DELTA FILMS; AB-PLANE;
DISPERSIONS; PERFORMANCE
AB YBa2Cu3O7-x (YBCO) films with nanoparticles of BaSnO3 (BSO) were processed using pulsed laser ablation of a special target made with dual phase sectors of YBCO and BSO. Transport critical current density (J(ct)) of these YBCO+BSO films in applied magnetic fields and angular dependence of J(ct) on the applied field orientation was measured. It was observed that in the YBCO+BSO films, the J(ct) (H parallel to c orientation) increased considerably as compared to regular YBCO films and was 1.3 times higher than J(ct) in H parallel to ab orientation. Cross-sectional transmission electron microscopy images on YBCO+BSO films showed the presence of high density (3.5x10(11) cm(-2)) of nanoparticles (similar to 10 nm size) and nanocolumns that extended throughout the thickness of the films with high density of dislocations and stacking faults (1000 mu m(-2)). The observed results of enhancements in J(ct) in H parallel to c and J(ct) in H parallel to ab orientations were discussed in the light of the observed microstructural details.
C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA.
Texas A&M Univ, College Stn, TX 77843 USA.
Ohio State Univ, Columbus, OH 43210 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Varanasi, CV (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
EM chakrapani.varanasi@wpafb.af.mil
RI Wang, Haiyan/P-3550-2014; Sumption, Mike/N-5913-2016
OI Wang, Haiyan/0000-0002-7397-1209; Sumption, Mike/0000-0002-4243-8380
NR 16
TC 45
Z9 45
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD SEP 15
PY 2007
VL 102
IS 6
AR 063909
DI 10.1063/1.2783783
PG 5
WC Physics, Applied
SC Physics
GA 215CZ
UT WOS:000249787200075
ER
PT J
AU Battula, A
Chen, S
Lu, Y
Knize, RJ
Reinhardt, K
AF Battula, Arvind
Chen, Shaochen
Lu, Yalin
Knize, R. J.
Reinhardt, Kitt
TI Tuning the extraordinary optical transmission through subwavelength hole
array by applying a magnetic field
SO OPTICS LETTERS
LA English
DT Article
ID LIGHT TRANSMISSION; CRYSTALS; FILMS
AB The transmission of light through a thin Ag film with a periodic subwavelength hole array can be influenced by the presence of the externally applied magnetic field H. Using a three-dimensional finite element method, we show that the spectral locations of the transmission peak resonances can be shifted by varying the magnitude and direction of the H. The transmission peaks have blueshift, and the higher the magnitude of H the larger the blueshift. The shift is due to the change of cavity resonance condition as a result of the magneto-induced anisotropy in the optical properties of the Ag film. Hence, high transmittance for any desired wavelength can be achieved by applying an appropriate H to the metallic film of optimized material and hole parameters. (c) 2007 Optical Society of America.
C1 Univ Texas, Ctr Nano & Mol Sci & Technol, Dept Mech Engn, Austin, TX 78712 USA.
USAF Acad, Laser Opt Res Ctr, Dept Phys, Colorado Springs, CO 80840 USA.
AFOSR, NE, Arlington, VA 22203 USA.
RP Chen, S (reprint author), Univ Texas, Ctr Nano & Mol Sci & Technol, Dept Mech Engn, Austin, TX 78712 USA.
EM scchen@mail.utexas.edu
NR 18
TC 30
Z9 30
U1 0
U2 7
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 SEP 15
PY 2007
VL 32
IS 18
BP 2692
EP 2694
DI 10.1364/OL.32.002692
PG 3
WC Optics
SC Optics
GA 220JB
UT WOS:000250151900020
PM 17873937
ER
PT J
AU Akdim, B
Kar, T
Duan, XF
Pachter, R
AF Akdim, Brahim
Kar, Tapas
Duan, Xiaofeng
Pachter, Ruth
TI Density functional theory calculations of ozone adsorption on sidewall
single-wall carbon nanotubes with Stone-Wales defects
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID CHEMISTRY; REACTIVITY; OZONATION; OXIDATION
AB In this study, we employed density functional theory to investigate the adsorption mechanisms of O-3 on the sidewalls of C(5,5), C(8,8), and C(10,0) single-wall carbon nanotubes (SWCNTs), also having Stone-Wales (SW) defects with different orientations. An understanding of the adsorption of O-3 on SWCNT sidewalls with SW defects was obtained by examining local structural changes, described by the pyramid alization angle, while in investigating the electronic structure of ozonized SWCNT, the results were found to be consistent with experimental observations in some cases. (C) 2007 Published by Elsevier B.V.
C1 Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
Utah State Univ, Dept Chem & Biochem, Logan, UT 84322 USA.
RP Akdim, B (reprint author), Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
EM Brahim.Akdim@wpafb.af.mil; Ruth.Pachter@wpafb.af.mil
NR 23
TC 32
Z9 32
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD SEP 13
PY 2007
VL 445
IS 4-6
BP 281
EP 287
DI 10.1016/j.cplett.2007.08.001
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 223JU
UT WOS:000250367100040
ER
PT J
AU Zhdanov, BV
Knize, RJ
AF Zhdanov, B. V.
Knize, R. J.
TI Hydrocarbon-free potassium laser
SO ELECTRONICS LETTERS
LA English
DT Article
ID 795-NM RUBIDIUM LASER; VAPOR LASER
C1 USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
RP Zhdanov, BV (reprint author), USAF Acad, Dept Phys, 2354 Fairchild Dr,Ste 2A31, Colorado Springs, CO 80840 USA.
EM boris.zhdanov@usafa.edu
NR 11
TC 34
Z9 36
U1 2
U2 4
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 0013-5194
J9 ELECTRON LETT
JI Electron. Lett.
PD SEP 13
PY 2007
VL 43
IS 19
BP 1024
EP 1025
DI 10.1049/el:20071587
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA 225OC
UT WOS:000250526200011
ER
PT J
AU Ramos, C
Dagdigian, PJ
AF Ramos, Christopher
Dagdigian, Paul J.
TI Effect of photochemistry on molecular detection by cavity ringdown
spectroscopy: case study of an explosive-related compound
SO APPLIED OPTICS
LA English
DT Article
ID DOWN SPECTROSCOPY; SIMULTANEOUS KINETICS; NITRO-COMPOUNDS; IONIZATION;
FRAGMENTATION; ULTRAVIOLET; STATES
AB Explosives and explosive-related compounds usually have dissociative excited electronic states. We consider the effect of excited-state dissociation upon an absorption event on the IN cavity ringdown spectroscopy (CRDS) detection of these molecules. A change in the photon decay lifetime with increasing laser energy is demonstrated with vapors of 2,6-dinitrotoluene in the open atmosphere. The magnitude of the effect is modeled with coupled equations describing the time-dependent light intensity and molecular concentration within the cavity. The light intensities required within this model to explain the observed changes in the photon decay lifetimes are consistent with the light intensities expected within the cavity under our experimental conditions. It was also found that the slow diffusion of the molecules in static air can magnify the effect of photochemistry on UV CRDS trace detection of molecules with dissociative excited states. (c) 2007 Optical Society of America.
C1 Johns Hopkins Univ, Dept Chem, Baltimore, MD 21218 USA.
RP Dagdigian, PJ (reprint author), Patrick AFB, 1030 S Highway A1A, Patrick AFB, FL 32925 USA.
EM pjdagdigian@jhu.edu
NR 26
TC 2
Z9 2
U1 1
U2 5
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 SEP 10
PY 2007
VL 46
IS 26
BP 6526
EP 6532
DI 10.1364/AO.46.006526
PG 7
WC Optics
SC Optics
GA 220PP
UT WOS:000250169000005
PM 17846646
ER
PT J
AU Hager, CH
Sanders, J
Sharma, S
Voevodin, A
AF Hager, C. H., Jr.
Sanders, J.
Sharma, S.
Voevodin, A.
TI Gross slip fretting wear of CrCN, TiAlN, Ni, and CuNiIn coatings on
Ti6Al4V interfaces
SO WEAR
LA English
DT Article; Proceedings Paper
CT 16th International Conference on Wear of Materials
CY APR 15-19, 2007
CL Montreal, CANADA
DE fretting wear; Ti6Al4V; gross slip; coatings; CrCN; TiAlN
ID SLIDING METALS; TITANIUM; ALLOYS; TEMPERATURE; MECHANISM; FRICTION;
BEHAVIOR
AB Fretting is a low amplitude oscillatory wear that occurs at component interfaces and can accelerate crack initiation as well as interfacial degradation. Prevalent in Ti-alloy contacts, fretting wear often occurs at the blade/disk interfaces of fan and compressor stages in turbine engines, causing premature component failure. In many cases, plasma sprayed CuNiIn (copper-nickel-indium) coatings and solid lubricants are applied to blade roots to mitigate the fretting problem. However, the CuNiIn coatings can cause severe damage to the uncoated Ti-alloy counter parts once the solid lubricants wear out. In this study, bench level gross slip fretting wear tests were conducted at room temperature on unlubricated Ti6A14V (titanium, 6% aluminum, 4% vanadium) surfaces mated with CuNiln and commercially pure Ni plasma sprayed surfaces. Upon analysis, it was determined that the uncoated Ti6A14V surfaces initially gall. Then the resulting adherent wear particles break up causing a transition into a third body type wear mode over time. This leads to an accumulation of wear that is similar to that of uncoated Ti6A14V mating surfaces. Additional tests were conducted after applying 2-mu m thick PVD deposited TiAlN (titanium-aluminium-nitride) and CrCN (chrome-carbon-nitride) coatings to the surfaces of a second set of Ti6A14V mating pairs. When worn against the unlubricated CuNiln and Ni coatings, the thin TiAlN and CrCN coatings wore gradually without delaminating or cracking and were able to mitigate galling and extend test life. The application of the hard coatings lead to a reduction in wear in all of the tests except with the combination of TiAlN worn against CuNiln. Published by Elsevier B.V.
C1 United Technol Corp, Dayton, OH 45432 USA.
MLBT, AFRL, Wright Patterson AFB, OH 45433 USA.
RP Hager, CH (reprint author), United Technol Corp, 1270 N fairrffield Rd, Dayton, OH 45432 USA.
EM carl.hager@wpafb.af.mil
RI Voevodin, Andrey/I-6684-2013
NR 14
TC 13
Z9 15
U1 1
U2 16
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0043-1648
J9 WEAR
JI Wear
PD SEP 10
PY 2007
VL 263
SI SI
BP 430
EP 443
DI 10.1016/j.wear.2006.12.085
PN 1
PG 14
WC Engineering, Mechanical; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA 217LY
UT WOS:000249950600053
ER
PT J
AU Newell, PT
Wing, S
Rich, FJ
AF Newell, P. T.
Wing, S.
Rich, F. J.
TI Cusp for high and low merging rates
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID INTERPLANETARY MAGNETIC-FIELD; MAGNETOSHEATH PLASMA; DAYSIDE
MAGNETOPAUSE; POLAR CUSP; PRECIPITATION; MAGNETOSPHERE; RECONNECTION;
ALTITUDE; MANTLE; REGION
AB The traditional distinction between the cusp for northward and southward interplanetary magnetic field ( IMF) conditions is deficient in that many, if not most, ``northward'' IMF cusp encounters closely resemble southward IMF encounters. Partly for that reason, ``southward'' IMF cusps have been far more often examined than ``northward. ''Recently, Newell et al. ( 2007) showed that the magnetopause merging rate, d Phi (MP)/dt, much better predicts cusp latitude than does B-z ( or Bs). Here, we investigate the extent to which high and low merging rate conditions better separates cusp encounters into mutually distinct classes. Indeed, high merging rate cusps ( those with d Phi (MP)/dt > 2* < d Phi (MP)/dt >) differ from low merging rate cusps ( those with dF MP/dt < 0.5 < d Phi(MP)/dt >) in several quantitative and even qualitative ways. High-energy ( tens of keV) ions, apparently of magnetospheric origin, do not extend into the high merging rate cusp but frequently do for low merging rates. However, the dispersion curve for ions, apparently of magnetosheath origin, extends to several keV for high merging rates but only to 1-2 keV for low merging rates. The local time extent of the cusp is 2.33 hours MLT for low merging rate conditions and 3.45 hours MLT for high merging rate conditions. All high merging rate cusps show clear forward dispersion ( declining energy with increasing latitude) with low-energy ion cutoffs within that dispersion. Low merging rates cusps rarely show forward dispersion, but about half, or slightly less, show reverse dispersion ( declining energy with decreasing latitude) at the poleward edge of the cusp. Low-energy ion cutoffs in the low-merging rate cusp primarily occur only within that reverse dispersion. ``Double'' cusps, some with very clear latitudinal separation, occur in some high merging rate cases, but no low merging rate cases. The high merging rates cases also typically have a ``shadow'' region of electron-only precipitation at roughly polar rain energies and intensities, lying immediately equatorward of the main cusp. For low-merging rate conditions, the region immediately equatorward of the cusp ( main magnetosheath ion population) contains ions as well as electrons, and forms a boundary layer.
C1 Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA.
USAF, Hanscom Air Force Base, Space Vehicles Directorate, Bedford, MA USA.
RP Newell, PT (reprint author), Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA.
EM patrick.newell@jhuapl.edu
NR 30
TC 7
Z9 7
U1 1
U2 3
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD SEP 8
PY 2007
VL 112
IS A9
AR A09205
DI 10.1029/2007JA012353
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 209FE
UT WOS:000249373600008
ER
PT J
AU Barnes, G
Leka, KD
Schumer, EA
Della-, DJ
AF Barnes, G.
Leka, K. D.
Schumer, E. A.
Della-Rose, D. J.
TI Probabilistic forecasting of solar flares from vector magnetogram data
SO SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
LA English
DT Article
ID MAGNETIC-FIELD PROPERTIES; QUIET ACTIVE REGIONS; SAMPLE
AB Discriminant analysis is a statistical approach for assigning a measurement to one of several mutually exclusive groups. Presented here is an application of the approach to solar flare forecasting, adapted to provide the probability that a measurement belongs to either group, the groups in this case being solar active regions which produced a flare within 24 hours and those that remained flare quiet. The technique is demonstrated for a large database of vector magnetic field measurements obtained by the University of Hawai'i Imaging Vector Magnetograph. For a large combination of variables characterizing the photospheric magnetic field, the results are compared to a Bayesian approach for solar flare prediction, and to the method employed by the U. S. Space Environment Center (SEC). Although quantitative comparison is difficult as the present application provides active region (rather than whole-Sun) forecasts, and the present database covers only part of one solar cycle, the performance of the method appears comparable to the other approaches.
C1 [Barnes, G.; Leka, K. D.] Northwest Res Associates Inc, Colorado Res Associates Div, Boulder, CO USA.
[Schumer, E. A.] AF Inst Technol, Wright Patterson AFB, OH USA.
[Della-Rose, D. J.] USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
RP Barnes, G (reprint author), Northwest Res Associates Inc, Colorado Res Associates Div, Boulder, CO USA.
NR 24
TC 24
Z9 25
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 1542-7390
J9 SPACE WEATHER
JI Space Weather
PD SEP 7
PY 2007
VL 5
IS 9
AR S09002
DI 10.1029/2007SW000317
PG 9
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
GA 261JR
UT WOS:000253075400003
ER
PT J
AU Stricker, JT
Gudmundsdottir, AD
Smith, AP
Taylor, BE
Durstock, MF
AF Stricker, Jeffery T.
Gudmundsdottir, Anna D.
Smith, Adam P.
Taylor, Barney E.
Durstock, Michael F.
TI Bistability in doped organic thin film transistors
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID FIELD-EFFECT DEVICES; CONDUCTING POLYMER; ELECTRIC-FIELD; CHEMICAL
DERIVATIZATION; FABRICATION; REDOX; PH;
POLY(3,4-ETHYLENEDIOXYTHIOPHENE); DEPENDENCE; TRANSPORT
AB Organic thin film transitors (TFTs) with the conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid), PEDOT:PSS, as the active layer and cross-linked, layer-by-layer assembled poly(allylamine hydrochloride)/poly(acrylic acid) (PAH/PAA) multilayers as the gate dielectric layer were investigated. A combination of spectroscopic data and device performance characteristics was used to study the behavior of these TFT devices under a variety of controlled environmental test conditions. It was shown that depletion and recovery of the device can be induced to occur by a means that is consistent with the electrochemical oxidation and reduction of water contained in the film. In addition to acting as a reactant, moisture also acts as a plasticizer to control the mobility of other species contained in the film and thereby permits bistable operation of these devices. Raman spectroscopy was used to show that the observed device switching behavior is due to a change in the PEDOT doping level.
C1 Univ Cincinnati, Dept Chem, Cincinnati, OH 45221 USA.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
Univ Dayton, Res Inst, Dayton, OH 45469 USA.
UES Inc, Beavercreek, OH USA.
RP Durstock, MF (reprint author), Univ Cincinnati, Dept Chem, Cincinnati, OH 45221 USA.
EM Michael.Durstock@wpafb.af.mil
NR 36
TC 3
Z9 3
U1 0
U2 7
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD SEP 6
PY 2007
VL 111
IS 35
BP 10397
EP 10401
DI 10.1021/jp070177g
PG 5
WC Chemistry, Physical
SC Chemistry
GA 206FR
UT WOS:000249169800009
PM 17696384
ER
PT J
AU Wang, JS
Wai, CM
Shimizu, K
Cheng, F
Boeckl, JJ
Maruyama, B
Brown, G
AF Wang, Joanna S.
Wai, Chien M.
Shimizu, Kenichi
Cheng, Frank
Boeckl, John J.
Maruyama, Benji
Brown, Gail
TI Purification of single-walled carbon nanotubes using a supercritical
fluid extraction method
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID URANIUM-DIOXIDE; NITRIC-ACID; DISSOLUTION; GAS; DIAMETER; COMPLEX;
GROWTH; TUBES; CO2
AB Metal catalyst used in the production of single-walled carbon nanotubes (SWNTs) can be effectively removed from the as-grown nanotubes by an in situ chelation/supercritical fluid carbon dioxide extraction method. A pretreatment procedure using bulk electrolysis with ethylenediaminetetraacetic acid significantly improve, the efficiency of supercritical fluid extraction probably by removing the amorphous carbon associated with the metal from the SWNTs. More than 98% of the iron impurity can be removed from the as-grown SWNTs using this two-step purification method without obvious damage to the nanotube structures according to our spectroscopic data.
C1 Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Wai, CM (reprint author), Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
EM cwai@uidaho.edu
RI Maruyama, Benji/E-3634-2010;
OI Shimizu, Kenichi/0000-0001-8261-8098
NR 31
TC 11
Z9 12
U1 0
U2 9
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 SEP 6
PY 2007
VL 111
IS 35
BP 13007
EP 13012
DI 10.1021/jp073374o
PG 6
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 206FS
UT WOS:000249169900021
ER
PT J
AU Jiang, CY
Wang, XY
Gunawidjaja, R
Lin, YH
Gupta, MK
Kaplan, DL
Naik, RR
Tsukruk, VV
AF Jiang, Chaoyang
Wang, Xianyan
Gunawidjaja, Ray
Lin, Yen-Hsi
Gupta, Maneesh K.
Kaplan, David L.
Naik, Rajesh R.
Tsukruk, Vladimir V.
TI Mechanical properties of robust ultrathin silk fibroin films
SO ADVANCED FUNCTIONAL MATERIALS
LA English
DT Article
ID BOMBYX-MORI SILK; FREELY SUSPENDED NANOMEMBRANES; GOLD NANOPARTICLE
ARRAYS; SPIDER SILK; SECONDARY STRUCTURE; THERMAL-PROPERTIES;
NEPHILA-CLAVIPES; MULTILAYER FILMS; DRAGLINE SILK; THIN-FILMS
AB Robust ultrathin multilayer films of silk fibroin were fabricated by spin coating and spin-assisted layer-by-layer assembly and their mechanical properties Were studied both in tensile and compression modes for the first time. The ultrathin films were characterized by a high elastic modulus of 6-8 GPa- (after treatment with methanol) with the ultimate tensile strength reaching MPa. The superior toughness is times higher than that usually observed for conventional, polymer composites (328 kJ m(-3) for the silk material studied, here versus typical values of < 100 kJ m(-3)). These outstanding properties are suggested to be caused by the gradual development of the self-reinforcing microstructure of highly crystalline beta-sheets, serving as reinforcing fillers and physical crosslinks, a process that is well known for bulk silk materials but it is demonstrated here to occur in ultrathin films as well, despite their limited dimensions. However, the confined state within films thinner than the lengths of the extended domains causes a significantly reduced elasticity which should be considered in the design of nanosized films from silk materials. Such regenerated silk fibrbirt with outstanding mechanical strength have potential applications in microscale films biodevices, biocompatible implants, and synthetic coatings for artificial skin.
C1 Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
Tufts Univ, Dept Biomed Engn, Boston, MA 02125 USA.
Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
USAF, Res Lab, Mat & Mfg Directrote, Wright Patterson AFB, OH 45433 USA.
RP Jiang, CY (reprint author), Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
EM viadimir@mse.gatech.edu
RI Jiang, Chaoyang/E-4925-2010; Gupta, Maneesh/E-7492-2010
NR 75
TC 176
Z9 180
U1 19
U2 171
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1616-301X
J9 ADV FUNCT MATER
JI Adv. Funct. Mater.
PD SEP 3
PY 2007
VL 17
IS 13
BP 2229
EP 2237
DI 10.1002/adfm.200601136
PG 9
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 212ZY
UT WOS:000249636900029
ER
PT J
AU Shterengas, L
Kaspi, R
Ongstad, AP
Suchalkin, S
Belenky, G
AF Shterengas, L.
Kaspi, R.
Ongstad, A. P.
Suchalkin, S.
Belenky, G.
TI Carrier capture in InGaAsSb/InAs/InGaSb type-II laser heterostructures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB Experimental studies of the electron and hole concentration dynamics in the barrier of GaSb-based type-II quantum-well (QW) heterostructures were performed. Capture of electrons and holes was studied separately in specially designed and grown laser heterostructures with QWs only for electrons or only for holes. The difference between electron and hole relaxation rates is explained by corresponding QW carrier confinement energies. (c) 2007 American Institute of Physics.
C1 SUNY Stony Brook, Stony Brook, NY 11794 USA.
USAF, Res Lab, Direct Energy Directorate, Adv Tact Lasers Syst Branch,AFRL DELS, Albuquerque, NM 87117 USA.
RP Belenky, G (reprint author), SUNY Stony Brook, Stony Brook, NY 11794 USA.
EM garik@ece.sunysb.edu
NR 5
TC 8
Z9 8
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 SEP 3
PY 2007
VL 91
IS 10
AR 101106
DI 10.1063/1.2771037
PG 3
WC Physics, Applied
SC Physics
GA 208MH
UT WOS:000249322900006
ER
PT J
AU Simpson, TB
Doft, F
Peterson, PR
Gavrielides, A
AF Simpson, T. B.
Doft, F.
Peterson, P. R.
Gavrielides, A.
TI Coherent combining of spectrally broadened fiber lasers
SO OPTICS EXPRESS
LA English
DT Article
ID CAVITY
AB We demonstrate that fiber lasers spectrally broadened by cross mode coupling can be coherently combined with high efficiency. The spectral broadening that it induces suppresses stimulated Brillouin scattering. Using long cavity length lasers, > 800 m, we induce spectral broadening of > 50 GHz and show mode by mode coherence in the output of four intracavity coupled fiber lasers. (c) 2007 Optical Society of America.
C1 L 3 Commun Jaycor, San Diego, CA 92121 USA.
USAF, Res Labs, Directed Energy Directorate DELO, Kirtland AFB, NM 87117 USA.
RP Simpson, TB (reprint author), L 3 Commun Jaycor, 3394 Carmel Mt Rd, San Diego, CA 92121 USA.
EM thomas.simpson@l-3com.com
NR 12
TC 15
Z9 15
U1 0
U2 0
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD SEP 3
PY 2007
VL 15
IS 18
BP 11731
EP 11740
DI 10.1364/OE.15.011731
PG 10
WC Optics
SC Optics
GA 208SP
UT WOS:000249339800074
PM 19547534
ER
PT J
AU Ren, SP
Yu, Y
Chen, NN
Tsai, JJP
Kwiat, K
AF Ren, Shangping
Yu, Yue
Chen, Nianen
Tsai, Jeffrey J. -P.
Kwiat, Kevin
TI The Role of Roles in Supporting Reconfigurability and Fault
Localizations for Open Distributed and Embedded Systems
SO ACM TRANSACTIONS ON AUTONOMOUS AND ADAPTIVE SYSTEMS
LA English
DT Article
DE Design; Performance; Reliability; Security; Coordination; open
distributed embedded systems; actors; roles; coordinators
AB One of the main characteristics of open distributed embedded systems is that the involved entities are often very dynamic-different individual entities may join or leave the systems frequently. Therefore, systems built of these dynamic entities must be runtime reconfigurable. In addition, large classes of open embedded systems often have high availability and dependability requirements. However, the openness makes these requirements more difficult to achieve and the system more vulnerable to attacks.
This article presents a coordination model, the Actor, Role and Coordinator (ARC) model, that aims to support reconfigurability and fault localization for open distributed embedded software systems. In particular, the actor model is used to model concurrent embedded entities, while the system's reconfigurability and dependability requirements are encapsulated within coordination objects: roles and coordinators, and are achieved through coordination among the actors. Roles, as a key thrust in the ARC model not only represent an abstraction for a set of behaviors shared by a group of actors so that reconfiguration within the roles becomes transparent to entities outside the roles, but also assume coordination responsibilities among the member actors. The article also argues from both analytical and empirical perspectives that with the support of the role, faults can be localized within actors, and actor level reconfiguration becomes transparent to the system.
C1 [Ren, Shangping; Yu, Yue; Chen, Nianen] IIT, Dept CS, Chicago, IL 60616 USA.
[Tsai, Jeffrey J. -P.] UIC, Dept CS, Chicago, IL 60607 USA.
[Kwiat, Kevin] USAF, Res Lab, Rome, NY 13441 USA.
RP Ren, SP (reprint author), IIT, Dept CS, 10 W 31st St, Chicago, IL 60616 USA.
EM ren@iit.edu
NR 51
TC 1
Z9 1
U1 0
U2 0
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 2 PENN PLAZA, STE 701, NEW YORK, NY 10121-0701 USA
SN 1556-4665
EI 1556-4703
J9 ACM T AUTON ADAP SYS
JI ACM Trans. Auton. Adapt. Syst.
PD SEP
PY 2007
VL 2
IS 3
AR 10
DI 10.1145/1278460.1278464
PG 27
WC Computer Science, Artificial Intelligence; Computer Science, Information
Systems; Computer Science, Theory & Methods
SC Computer Science
GA V03ZR
UT WOS:000207029200004
ER
PT J
AU Sen, I
Tamirisakandala, S
Miracle, DB
Ramamurty, U
AF Sen, Indrani
Tamirisakandala, S.
Miracle, D. B.
Ramamurty, U.
TI Microstructural effects on the mechanical behavior of B-modified
Ti-6Al-4V alloys
SO ACTA MATERIALIA
LA English
DT Article
DE titanium alloys; microstructure; mechanical properties; fracture
toughness; fatigue
ID FATIGUE-CRACK GROWTH; CAST TITANIUM-ALLOYS; BORON ADDITION; STRESS;
TOUGHNESS
AB Small additions of B (<= 0.4 wt.%) to Ti alloys refine the as-east microstructure significantly and improve the alloys' mechanical performance. In this work, tensile, fracture and fatigue properties of the as-cast and hot isostatically pressed Ti-6Al-4V alloy with 0, 0.05, 0.10 and 0.40 wt.% B additions have been examined, with particular emphasis on identifying the microstructural length scale (grain size vs. lath size) that controls the mechanical properties of these alloys. Microstructural observations indicate an order of magnitude reduction in the prior beta grain size, d, as well as a significant reduction in the alpha lath size, lambda, with B additions. It was observed that d and lambda are correlated. With the refinement in the microstructure, the yield and ultimate tensile strengths, sigma(y) and sigma(u) respectively, increase whereas the fracture toughness, K-IC, decreases. Application of the Rice-Knott-Ritchie model for quasi-brittle cleavage fracture indicates that the reduction in K-IC with increasing B content is due primarily to the reduced lambda. Fatigue crack growth measurements show a gradual reduction in the threshold for fatigue crack propagation with sigma(y)root lambda dependence. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Ramamurty, U (reprint author), Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India.
EM ramu@materials.iisc.ernet.in
RI Ramamurty, Upadrasta/E-5623-2011; Sen, Indrani/C-9419-2012
NR 22
TC 162
Z9 168
U1 9
U2 52
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 SEP
PY 2007
VL 55
IS 15
BP 4983
EP 4993
DI 10.1016/j.actamat.2007.05.009
PG 11
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 216RG
UT WOS:000249896100006
ER
PT J
AU Fadare, O
Tavassoli, FA
AF Fadare, Oluwole
Tavassoli, Fattaneh A.
TI The phenotypic spectrum of basal-like breast cancers: a critical
appraisal
SO ADVANCES IN ANATOMIC PATHOLOGY
LA English
DT Review
DE breast; basal-like; basal-type; basaloid; carcinoma; gene expression
profiling; pathology
ID CARCINOMA IN-SITU; ADENOID CYSTIC CARCINOMA; GENE-EXPRESSION PROFILES;
COMPARATIVE GENOMIC HYBRIDIZATION; INVASIVE DUCTAL CARCINOMAS; GERMLINE
BRCA1 MUTATIONS; CENTRAL ACELLULAR ZONES; GROWTH-FACTOR RECEPTOR;
ESTROGEN-RECEPTOR; HIGH-GRADE
AB There are 2 well-recognized cell populations lining the mammary duct system: the epithelial cells lining the lumen and the myoepithelial cells surrounding them. The mammary stem cell, a putative third cell type, has not yet been well characterized. It is not established whether the putative stem cell expresses the full complement, a subset, or none of the markers of normal epithelial and/or myoepithelial cells. However, it is likely that they would have distinctive markers of their own; whether these are retained or lost in their neoplastic progeny is unknown. All 3 cell types may theoretically undergo malignant transformation. Until recently, however, nearly all attention has been focused on carcinomas of epithelial derivation/differentiation. The advent of oligonucleotide and cDNA microarrays has facilitated gene expression profiling of breast cancers, revealing molecular subclasses that may be prognostically relevant. One such subclass, the basal-like breast carcinomas, has been found in numerous independent datasets to be associated with a comparatively worse overall and disease-free survival. These cancers show expression of molecules characteristic of the normal myoepithelial cell, such as basal cytokeratins, and reduced expression of estrogen receptor-related and Erb-B2-related genes and proteins. The classifier genes that formed the basis for the delineation of basal-like carcinomas were derived from datasets that were composed predominantly of ductal type cancers. Therefore, the clinical significance of a basal-like gene expression or immunohistochemical profile in the other breast cancer subtypes is presently unknown. Herein, we evaluate in detail the current state of knowledge on the pathologic features of breast carcinomas classified as basal-like by immunohistochemical and/or gene expression profiling criteria, with an emphasis on their full phenotypic spectrum and also previously underemphasized areas of heterogeneity and ambiguity where present. There seems to be a phenotypic and biologic spectrum of basal-like or myoepithelial-type carcinomas, just as there is a wide range among tumors of luminal epithelial derivation/differentiation. It is critical to promote lucid morphologic definitions of the molecular subtypes, if this information is intended for use in targeted therapies and patient management.
C1 Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA.
Univ Texas, Hlth Sci Ctr, San Antonio, TX 78285 USA.
Yale Univ, Sch Med, Dept Pathol, New Haven, CT 06520 USA.
Yale New Haven Med Ctr, Dept Pathol, New Haven, CT 06504 USA.
RP Fadare, O (reprint author), Wilford Hall USAF Med Ctr, Dept Pathol, 2200 Bergquisst Dr,Ste 1, Lackland AFB, TX 78236 USA.
EM oluwolefadare@yahoo.com
NR 151
TC 52
Z9 56
U1 0
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1072-4109
J9 ADV ANAT PATHOL
JI Adv. Anat. Pathol.
PD SEP
PY 2007
VL 14
IS 5
BP 358
EP 373
DI 10.1097/PAP.0b013e31814b26fe
PG 16
WC Pathology
SC Pathology
GA 204ED
UT WOS:000249025500008
PM 17717437
ER
PT J
AU Fadare, O
AF Fadare, Oluwole
TI Perivascular epithelioid cell tumors (PEComas) and smooth muscle tumors
of the uterus
SO AMERICAN JOURNAL OF SURGICAL PATHOLOGY
LA English
DT Letter
ID NEURAL CREST; IN-VITRO
C1 Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA.
RP Fadare, O (reprint author), Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA.
NR 21
TC 10
Z9 10
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0147-5185
J9 AM J SURG PATHOL
JI Am. J. Surg. Pathol.
PD SEP
PY 2007
VL 31
IS 9
BP 1454
EP 1455
DI 10.1097/PAS.0b013e318039b218
PG 2
WC Pathology; Surgery
SC Pathology; Surgery
GA 206FW
UT WOS:000249170300022
PM 17721205
ER
PT J
AU Bebarta, VS
Little, C
Fragoso, M
Heard, K
AF Bebarta, V. S.
Little, C.
Fragoso, M.
Heard, K.
TI A swine model for poison-induced cardiac arrest using intravenous
potassium cyanide
SO ANNALS OF EMERGENCY MEDICINE
LA English
DT Meeting Abstract
CT Research Forum of the American-College-of-Emergency-Physicians
CY OCT 08-09, 2007
CL Seattle, WA
SP Amer Coll Emergency Phys
C1 Wilford Hall USAF Med Ctr, Dept Emergency Med, San Antonio, TX 78236 USA.
Univ Colorado, Hlth Sci Ctr, Div Emergency Med, Denver, CO USA.
Univ Colorado, Hlth Sci Ctr, Dept Surg, Denver, CO USA.
Rocky Mt Poison & Drug Ctr, Denver Hlth, Denver, CO USA.
RI Bebarta, Vikhyat/M-1513-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0196-0644
J9 ANN EMERG MED
JI Ann. Emerg. Med.
PD SEP
PY 2007
VL 50
IS 3
SU S
BP S7
EP S7
DI 10.1016/j.annemergmed.2007.06.047
PG 1
WC Emergency Medicine
SC Emergency Medicine
GA 211PL
UT WOS:000249535600020
ER
PT J
AU Ferre, RM
Wasielewski, JN
Perron, AD
Strout, TD
AF Ferre, R. M.
Wasielewski, J. N.
Perron, A. D.
Strout, T. D.
TI The efficacy of tamsulosin in the treatment of ureteral stones in
emergency department patients
SO ANNALS OF EMERGENCY MEDICINE
LA English
DT Meeting Abstract
CT Research Forum of the American-College-of-Emergency-Physicians
CY OCT 08-09, 2007
CL Seattle, WA
SP Amer Coll Emergency Phys
C1 Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
Maine Med Ctr, Portland, ME 04102 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0196-0644
J9 ANN EMERG MED
JI Ann. Emerg. Med.
PD SEP
PY 2007
VL 50
IS 3
SU S
MA 28
BP S9
EP S10
DI 10.1016/j.annemergmed.2007.06.059
PG 2
WC Emergency Medicine
SC Emergency Medicine
GA 211PL
UT WOS:000249535600029
ER
PT J
AU Holder, AD
Kennebeck, G
AF Holder, A. D.
Kennebeck, G.
TI Cervical spine fractures: A consequence of mounted operations in Iraq
SO ANNALS OF EMERGENCY MEDICINE
LA English
DT Meeting Abstract
CT Research Forum of the American-College-of-Emergency-Physicians
CY OCT 08-09, 2007
CL Seattle, WA
SP Amer Coll Emergency Phys
C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0196-0644
J9 ANN EMERG MED
JI Ann. Emerg. Med.
PD SEP
PY 2007
VL 50
IS 3
SU S
MA 339
BP S106
EP S106
DI 10.1016/j.annemergmed.2007.06.400
PG 1
WC Emergency Medicine
SC Emergency Medicine
GA 211PL
UT WOS:000249535600341
ER
PT J
AU Mehta, SG
McNeill, CR
Kolkebeck, T
AF Mehta, S. G.
McNeill, C. R.
Kolkebeck, T.
TI An observational study of emergency medicine bedside ultrasound in a
far-forward deployed military operational environment
SO ANNALS OF EMERGENCY MEDICINE
LA English
DT Meeting Abstract
CT Research Forum of the American-College-of-Emergency-Physicians
CY OCT 08-09, 2007
CL Seattle, WA
SP Amer Coll Emergency Phys
C1 Brooke Army Med Ctr, Ft Sam Houston, TX 78234 USA.
Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0196-0644
J9 ANN EMERG MED
JI Ann. Emerg. Med.
PD SEP
PY 2007
VL 50
IS 3
SU S
MA 212
BP S67
EP S67
DI 10.1016/j.annemergmed.2007.06.364
PG 1
WC Emergency Medicine
SC Emergency Medicine
GA 211PL
UT WOS:000249535600212
ER
PT J
AU Greiner, MA
Duncan, BD
Dierking, MP
AF Greiner, Michael A.
Duncan, Bradley D.
Dierking, Matthew P.
TI Bidirectional scattering distribution functions of maple and cottonwood
leaves
SO APPLIED OPTICS
LA English
DT Article
ID LIGHT; REFLECTANCE
AB We present our investigations into the optical scattering properties of both sugar maple (Acer saccarum) and eastern cottonwood (Populus deltoides) leaves in the near-IR wavelength regime. The bidirectional scattering distribution function (BSDF) describes the fractions of light reflected by and transmitted through a leaf for a given set of illumination and observation angles. Experiments were performed to measure the BSDF of each species at a discrete set of illumination and observation angles. We then modeled the BSDFs in such a way that other researchers may interpolate their values for scattering in any direction under illumination at any angle. (c) 2007 Optical Society of America.
C1 Univ Dayton, Electroopt Program, Dayton, OH 45469 USA.
USAF, Res Lab, AFRl SNJM, Wright Patterson AFB, OH 45433 USA.
RP Greiner, MA (reprint author), Univ Dayton, Electroopt Program, 300 Coll Pk, Dayton, OH 45469 USA.
EM Michael.Greiner@wpafb.af.mil; Bradley.Duncan@notes.udayton.edu;
Matthew.Dierking@wpafb.af.mil
NR 9
TC 5
Z9 5
U1 2
U2 6
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 SEP 1
PY 2007
VL 46
IS 25
BP 6485
EP 6494
DI 10.1364/AO.46.006485
PG 10
WC Optics
SC Optics
GA 221ZP
UT WOS:000250266200040
PM 17805392
ER
PT J
AU Lucarelli, A
Frey, A
Yang, R
Lupke, G
Grilli, F
Haugan, T
Levin, G
Barnes, P
AF Lucarelli, A.
Frey, A.
Yang, R.
Luepke, G.
Grilli, F.
Haugan, T.
Levin, G.
Barnes, P.
TI AC current driven dynamic vortex state in YBa2Cu3O7-x
SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
LA English
DT Article
ID INDUCED ORGANIZATION; SUPERCONDUCTORS; FILMS; BI2SR2CACU2O8; CRYSTALS;
LATTICE; MOTION; MEMORY; PHASES; MATTER
AB Time-resolved magneto-optical imaging measurements show that an ac current enables the vortex matter in YBa2Cu3O7-x thin films to reorganize into two coexisting steady states of driven vortex motion with different characteristics: a quasi-static disordered glassy state in the sample interior and a dynamic state of plastic motion near the edges. Finite-element calculations consistent with the critical state model show good agreement with the measured field profiles in the quasi-static state but predict a larger hysteretic behavior in the dynamic state.
C1 Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USA.
Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA.
Wright Patterson AFB, AF Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Lucarelli, A (reprint author), Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USA.
EM axluca@wm.edu
RI Lucarelli, Andrea/A-5411-2010
NR 25
TC 3
Z9 3
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0947-8396
J9 APPL PHYS A-MATER
JI Appl. Phys. A-Mater. Sci. Process.
PD SEP
PY 2007
VL 88
IS 4
BP 601
EP 604
DI 10.1007/s00339-007-4018-5
PG 4
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 190MW
UT WOS:000248064100002
ER
PT J
AU Osswald, SS
Gaffney, FA
Kruyer, WB
Pickard, JS
Jackson, WG
AF Osswald, Sandra S.
Gaffney, F. Andrew
Kruyer, William B.
Pickard, Jeb S.
Jackson, William G.
TI Military aviators with mitral valve prolapse: Long-term follow-up and
aeromedical endpoints
SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE
LA English
DT Article
DE mitral valve prolapse; mitral regurgitation; valvular heart disease;
aviators; longitudinal study
ID ACCELERATION TOLERANCE; ASYMPTOMATIC AIRCREW; NATURAL-HISTORY;
DYSRHYTHMIAS
AB Introduction: Mitral valve prolapse (MVP) is a disqualifying condition for USAF aviators. Trained USAF aviators, and in recent years flying training applicants, may be granted waiver for initial or continued flying duties following extensive, periodic evaluation. This study examines the usefulness of the various tests performed in that evaluation process and provides long-term follow-up from 404 USAF flyers with MVP. Methods: We retrospectively reviewed 2-dimensional echocardiography, Holter monitoring, treadmill exercise, thallium imaging, coronary fluoroscopy, cardiac catheterization, and centrifuge testing results from 404 military aviators evaluated at the Aeromedical Consultation Service between 1 January 1972 and 31 October 1993. Follow-up was achieved through questionnaires (91%) and death certificates, etc. Results: Mean follow-up was 8.6 yr (range 1-21 yr). Age at study entry was 21 to 64 yr (mean = 36 yr). The occurrence rate for suddenly incapacitating events (sudden cardiac death, syncope, pre-syncope, and cerebral ischemic episodes) was 0.32%/yr. Conclusions: Echocardiographic MVP in military aviators is associated with a low but statistically increased prevalence of "incapacitating" aeromedical events. Univariate predictors of adverse outcome included study entry with an enlarged left ventricle or left atrium, cardiovascular symptoms or findings, or MVP with thickened leaflets. Evaluation of coronary artery disease (CAD) in this population, absent specific indicators of CAD risk, is not indicated. Keywords: mitral valve prolapse, mitral regurgitation, valvular heart disease, aviators, longitudinal study.
C1 Aeromed Consultant Serv, Brooks AFB, TX USA.
Vanderbilt Univ, Dept Med Educ & Adm, Nashville, TN USA.
Air Force Hlth Study, Brooks AFB, TX USA.
RP Gaffney, FA (reprint author), Vanderbilt Univ, 221 Kirkland Hall, Nashville, TN 37232 USA.
EM drew.gaffney@vanderbilt.edu
NR 21
TC 4
Z9 5
U1 0
U2 0
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 0095-6562
J9 AVIAT SPACE ENVIR MD
JI Aviat. Space Environ. Med.
PD SEP
PY 2007
VL 78
IS 9
BP 845
EP 851
PG 7
WC Public, Environmental & Occupational Health; Medicine, General &
Internal; Sport Sciences
SC Public, Environmental & Occupational Health; General & Internal
Medicine; Sport Sciences
GA 206HZ
UT WOS:000249175800001
PM 17891893
ER
PT J
AU Glisan, EW
Uribe, D
Adair-Hauck, B
AF Glisan, Eileen W.
Uribe, Daniel
Adair-Hauck, Bonnie
TI Research on integrated performance assessment at the post-secondary
level: Student performance across the modes of communication
SO CANADIAN MODERN LANGUAGE REVIEW-REVUE CANADIENNE DES LANGUES VIVANTES
LA English
DT Article
DE integrated performance assessment; three modes of; communication;
post-secondary language assessment; integration of teaching and
assessment
ID 2ND-LANGUAGE; LEARNERS
AB This article reports on a performance-based assessment research project conducted at the US Air Force Academy during the 2004-2005 academic year. The primary purpose of the research project was to measure post-secondary students' progress towards meeting the Standards for Foreign Language Learning in the 21st Century - specifically the three modes of communication. The article explains how Integrated Performance Assessment measures learners' language performance in light of current research in foreign language assessment. The paper demonstrates a sample Integrated Performance Assessment for a post-secondary Spanish culture and civilization course, and shares data on the students' performance for the interpretive, interpersonal, and presentational modes of communication. Correlational data on the impact of middle and high school language learning on post-secondary language performance is also shared. Finally, the paper argues that, unlike traditional testing formats, integrated performance assessment connects teaching, learning, and assessment seamlessly.
C1 [Glisan, Eileen W.] Indiana Univ Penn, Indiana, PA 15705 USA.
[Uribe, Daniel] USAF, Izmir, Turkey.
[Adair-Hauck, Bonnie] Univ Pittsburgh, Europeon Union, Ctr Excellence, Pittsburgh, PA 15260 USA.
[Adair-Hauck, Bonnie] Ctr European Studies, French Immers Program, Pittsburgh, PA USA.
RP Glisan, EW (reprint author), Indiana Univ Penn, Indiana, PA 15705 USA.
EM glisan@iup.edu
NR 62
TC 8
Z9 8
U1 1
U2 2
PU CANADIAN MODERN LANGUAGE REV
PI N YORK
PA UNIV TORONTO PRESS, JOURNALS DIVISION, 5201 DUFFERIN ST,, N YORK,
ONTARIO M3H 5T8, CANADA
SN 0008-4506
J9 CAN MOD LANG REV
JI Can. Mod. Lang. Rev.-Rev. Can. Lang. Vivantes
PD SEP
PY 2007
VL 64
IS 1
SI SI
BP 39
EP 67
DI 10.3138/cmlr.64.1.039
PG 29
WC Linguistics
SC Linguistics
GA 280ZT
UT WOS:000254466400003
ER
PT J
AU Bebarta, VS
Little, C
Fragoso, M
Heard, K
AF Bebarta, V. S.
Little, C.
Fragoso, M.
Heard, K.
TI A swine model for poison-induced cardiac arrest using intravenous
potassium cyanide
SO CLINICAL TOXICOLOGY
LA English
DT Meeting Abstract
C1 Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
Univ Colorado, Hlth Sci Ctr, Denver, CO 80202 USA.
Denver Hlth, Rocky Mt Poison & Drug Ctr, Denver, CO USA.
RI Bebarta, Vikhyat/M-1513-2015
NR 0
TC 2
Z9 2
U1 0
U2 1
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0731-3810
J9 CLIN TOXICOL
JI Clin. Toxicol.
PD SEP
PY 2007
VL 45
IS 6
MA 8
BP 606
EP 606
PG 1
WC Toxicology
SC Toxicology
GA 214UE
UT WOS:000249762900009
ER
PT J
AU Stanford, CF
Bebarta, VS
Holstege, CP
Bush, SP
Richardson, WH
Olsen, D
Dart, RC
AF Stanford, C. F.
Bebarta, V. S.
Holstege, C. P.
Bush, S. P.
Richardson, W. H.
Olsen, D.
Dart, R. C.
TI Is crotaline Fab antivenom efficacious for severe envenomations?
SO CLINICAL TOXICOLOGY
LA English
DT Meeting Abstract
C1 RMPDC Denver Hlth, Denver, CO USA.
Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA.
Univ Virginia, Charlottesville, VA USA.
Loma Linda Univ, Loma Linda, CA 92350 USA.
Palmetto Hlth Richland, Columbia, SC USA.
St Barnabas Hosp, Bronx, NY USA.
RI Bebarta, Vikhyat/M-1513-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU INFORMA HEALTHCARE
PI NEW YORK
PA 52 VANDERBILT AVE, NEW YORK, NY 10017 USA
SN 1556-3650
J9 CLIN TOXICOL
JI Clin. Toxicol.
PD SEP
PY 2007
VL 45
IS 6
MA 84
BP 619
EP 620
PG 2
WC Toxicology
SC Toxicology
GA 214UE
UT WOS:000249762900084
ER
PT J
AU Cheng, TS
Wehrmeyer, JA
Pitz, RW
AF Cheng, T. S.
Wehrmeyer, J. A.
Pitz, R. W.
TI Conditional analysis of lifted hydrogen jet diffusion flame experimental
data and comparison to laminar flame solutions
SO COMBUSTION AND FLAME
LA English
DT Article
DE lifted jet flame; Raman scattering; conditional means; laminar flame
calculations
ID MOMENT CLOSURE; TURBULENT FLAME; NITRIC-OXIDE; TEMPERATURE
AB Simultaneous point measurements of temperature, mixture fraction, major species, and OH concentrations in a lifted turbulent hydrogen jet flame are reprocessed to obtain the Favre average and conditional mean profiles. Large discrepancies between the Favre average and the ensemble average temperature, H2O, and OH mole fractions are found at the lifted flame base, due to density weighting of fairly large samples of unreacted mixtures. Conditional statistics are used to reveal the reaction zone structure in mixture fraction coordinates. The cross-stream dependence of conditional reactive scalars, which is most notable at the lifted flame base and decreases to negligible levels with increasing streamwise positions, could be attributed to radial differences in both the Damkohler number and the level of partial premixing. Conditional results indicate that the lifted flame is stabilized at the outer region of the jet characterized by low strain rates and lean mixtures. Comparison of the measured conditional mean OH vs H2O with a series of stretched laminar partially premixed flame and diffusion flame calculations reveals that strong partial premixing takes place at the lifted flame base and the strain rates vary from a = 14,000 to 100 s(-1). The level of partial premixing and the strain rate decrease with increasing downstream locations. The range of estimated scalar dissipation rates (X approximate to 1-0. 13 s(-1)) at a further downstream location (x/D = 33.3) is in agreement with reported values and the flame composition reaches an equilibrium condition at x/D = 194.4. These results combined with previously reported data provide a benchmark data set for evaluation and refinement of turbulent combustion models for lifted hydrogen jet flame predictions. (c) 2007 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 Chung Hua Univ, Dept Mech Engn, Hsinchu 300, Taiwan.
Aerospace Testing Alliance, Arnold AFB, TN 37389 USA.
Vanderbilt Univ, Dept Mech Engn, Nashville, TN 37235 USA.
RP Cheng, TS (reprint author), Chung Hua Univ, Dept Mech Engn, Hsinchu 300, Taiwan.
EM tscheng@chu.edu.tw
RI Pitz, Robert/H-7868-2016
OI Pitz, Robert/0000-0001-6435-5618
NR 27
TC 11
Z9 11
U1 0
U2 3
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 SEP
PY 2007
VL 150
IS 4
BP 340
EP 354
DI 10.1016/j.combustflame.2007.04.013
PG 15
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 203QT
UT WOS:000248989800005
ER
PT J
AU Mall, S
Cunningham, SR
AF Mall, S.
Cunningham, S. R.
TI Fatigue behavior of integrally fabricated Joints between titanium matrix
composite and titanium alloy
SO COMPOSITE STRUCTURES
LA English
DT Article
DE metal matrix composites; titanium matrix composites; integrally
fabricated joint; titanium alloy; fatigue; scarf joint
ID STRAIN-CONTROLLED MODE; ELEVATED-TEMPERATURE; FRACTURE MECHANISMS;
TENSILE
AB An integrally fabricated double scarf joint, with a taper ratio of 20: 1, between the monolithic titanium alloy and the silicon carbide fiber reinforced titanium matrix composite was studied under the monotonic and fatigue loading (both tension-tension and tension-compression) conditions. Further, the two parent materials forming this functionally graded material system were characterized under the similar loading conditions to compare their performance. In general, the mechanical response of the functionally graded material system was in-between those of the alloy and the composite under all loading conditions. The ultimate tensile strength of the functionally graded material showed a small improvement over that of the alloy; however, its modulus of elasticity in the joint region was about the average of its counterparts of alloy and composite. There was also a small improvement in fatigue life of the functionally graded material relative to that of the monolithic alloy in both tension-tension and tension-compression conditions. The fatigue damage initiated at fiber ends in the joint region and then progressed in the monolithic alloy section. The functionally graded material system containing the integrally fabricated joint between the monolithic titanium alloy and the titanium matrix composite provided the expected performance, i.e., it performed at least similar to its weakest link, i.e., titanium alloy, and it has potential to provide the practical benefits of cost, durability etc. Published by Elsevier Ltd.
C1 USAF, Inst Technol, Dept Aeronaut & Astronaut, AFIT ENY, Wright Patterson AFB, OH 45433 USA.
RP Mall, S (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, AFIT ENY, Bldg 640,2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM Shankar.Mall@afit.edu
NR 18
TC 2
Z9 3
U1 0
U2 3
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0263-8223
J9 COMPOS STRUCT
JI Compos. Struct.
PD SEP
PY 2007
VL 80
IS 1
BP 65
EP 72
DI 10.1016/j.compstruct.2006.02.032
PG 8
WC Materials Science, Composites
SC Materials Science
GA 179NI
UT WOS:000247296200007
ER
PT J
AU Phillips, CA
Repperger, DW
Kinsler, R
Bharwani, G
Kender, D
AF Phillips, Chandler A.
Repperger, Daniel W.
Kinsler, Rachel
Bharwani, Gavind
Kender, David
TI A quantitative model of the human-machine interaction and multi-task
performance: A strategy function and the unity model paradigm
SO COMPUTERS IN BIOLOGY AND MEDICINE
LA English
DT Article
DE human-machine interaction; multiple tasking; strategy; human operator
performance; information processing; MATB
ID INFORMATION; CAPACITY
AB A human-machine-interaction (HMI) model is developed for the human operator (HO) performing five simultaneous tasks and characterized by a strategy function. Five levels of total machine-initiated baud rate (B-IN) are generated by the multi-attribute task battery (MATB) and five HO baud rates (B-O) are then recorded. Total baud ratio ((B) over bar) is defined as the ratio of B-O to B-IN. Results indicate that with increasing B-IN levels: (1) there is an overall increase in B-O, and (2) there is an overall decrease in (B) over bar. These results are due to a decreasing HMI performance and divergence of the strategy function from a unity model paradigm. (C) 2007 Elsevier Ltd. All rights reserved.
C1 Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA.
USAF, Res Lab, AFRL HECP, Wright Patterson AFB, OH 45433 USA.
RP Phillips, CA (reprint author), Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA.
EM chandler.phillips@wright.edu
NR 21
TC 4
Z9 4
U1 2
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0010-4825
J9 COMPUT BIOL MED
JI Comput. Biol. Med.
PD SEP
PY 2007
VL 37
IS 9
BP 1259
EP 1271
DI 10.1016/j.compbiomed.2006.12.007
PG 13
WC Biology; Computer Science, Interdisciplinary Applications; Engineering,
Biomedical; Mathematical & Computational Biology
SC Life Sciences & Biomedicine - Other Topics; Computer Science;
Engineering; Mathematical & Computational Biology
GA 210XU
UT WOS:000249489700006
PM 17316596
ER
PT J
AU Czaplicki, R
Krupka, O
Meghea, A
Grote, JG
Kajzar, F
Sahraoui, B
AF Czaplicki, R.
Krupka, O.
Meghea, A.
Grote, J. G.
Kajzar, F.
Sahraoui, B.
TI Nonlinear optical cubic effects in functionalized DNA
SO DIGEST JOURNAL OF NANOMATERIALS AND BIOSTRUCTURES
LA English
DT Article
DE deoyribonucleic acid; DNA-surfactant complex; NLO properties; third
harmonic generation; degenerate four wave mixing; functionalized DNA
ID 3RD-HARMONIC GENERATION; SUSCEPTIBILITY; BIOPOLYMER; FILMS
AB In this paper we investigate the third-order nonlinear optical properties of DNA-based complexes using the optical third harmonic generation (THG) and degenerate four wave mixing (DFWM) techniques at a wavelength of 1064 nm and 532 nm, respectively. We found that the third- order susceptibility (chi((3))) of DNA-based films in the case of THG was about one order of magnitude larger than that of our reference, a pure silica slab. In thin films doped with 5% of the chromophore Disperse Red 1 (DR1), a two order of magnitude larger value of chi((3)) was observed. Also, in the case of DFWM the chi((3)) values of the guest-host system DNA-CTMA-DR1 was one (10%) or two (15%) orders of magnitude larger than for guest or host systems alone.
C1 [Czaplicki, R.; Krupka, O.; Kajzar, F.; Sahraoui, B.] Univ Angers, Lab POMA, CNRS, UMR 6136, F-49045 Lavoisier, France.
[Meghea, A.] Univ Politehn Bucuresti, Fac Appl Chem & Mat Sci, Bucharest 011061, Romania.
[Grote, J. G.] USAF, Mat Res Lab, Wright Patterson AFB, OH 45433 USA.
[Grote, J. G.] USAF, Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Czaplicki, R (reprint author), Univ Angers, Lab POMA, CNRS, UMR 6136, France 2Bd, F-49045 Lavoisier, France.
RI Meghea, Aurelia/C-2573-2011; Czaplicki, Robert/B-4201-2014
OI Czaplicki, Robert/0000-0003-1197-1614
FU European Office for Aerospace Research and Development in London
[064003]; Brancusi PAI [14935 YC]
FX The authors would like to thank European Office for Aerospace Research
and Development in London (grant SPC # 064003) for financial support.;
The authors are also grateful to Brancusi PAI for financial support
(grant no 14935 YC).
NR 17
TC 1
Z9 1
U1 0
U2 2
PU INST MATERIALS PHYSICS
PI BUCHAREST
PA NATL INST R&D MATERIALS PHYSICS, ATOMISTILOR STR, 105 BIS, BUCHAREST,
077125, ROMANIA
SN 1842-3582
J9 DIG J NANOMATER BIOS
JI Dig. J. Nanomater. Biostruct.
PD SEP
PY 2007
VL 2
IS 3
BP 277
EP 283
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 348EK
UT WOS:000259193600004
ER
PT J
AU Okolica, JS
Peterson, GL
Mills, RF
AF Okolica, James S.
Peterson, Gilbert L.
Mills, Robert F.
TI Using Author Topic to detect insider threats from email traffic
SO DIGITAL INVESTIGATION
LA English
DT Article
DE Author Topic (AT); insider threat; datamining; social networks; large
data set
AB One means of preventing insider theft is by stopping potential insiders from becoming actual thieves. This article discusses an approach to assist managers in identifying potential insider threats. By using the Author Topic [Rosen-Zvi Michal, Griffiths Thomas, Steyvers Mark, Smyth Padhraic. The author-topic model for authors and documents. In: Proceedings of the 20th conference on uncertainty in artificial intelligence; 2004. p. 487-94.] clustering algorithm, we discern employees' interests from their daily emails. These interests then provide a means to create an implicit and an explicit social network graph. This approach locates potential insiders by finding individuals who either (1) feel alienated from the organization (a key warning sign of a possible disgruntled worker) or (2) have a hidden interest in a sensitive (e. g. proprietary or classified) topic. In both cases, this is revealed when someone demonstrates an interest in a topic but does not share that interest with anyone in the organization. By applying this technique to the Enron email corpus, we produce coherent, sensible topics and reveal Sherron Watkins, the famous Enron whistleblower, as a potential insider threat from the viewpoint of the individuals behind the Enron scandal. Published by Elsevier Ltd.
C1 [Okolica, James S.; Peterson, Gilbert L.; Mills, Robert F.] USAF, Inst Technol, AFIT ENG, Wright Patterson AFB, OH 45433 USA.
RP Peterson, GL (reprint author), USAF, Inst Technol, AFIT ENG, Bldg 641,Room 220,2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM james.okolica@afit.edu; gilbert.peterson@afit.edu; robert.mills@afit.edu
NR 17
TC 2
Z9 2
U1 0
U2 3
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1742-2876
J9 DIGIT INVEST
JI Digit. Investig.
PD SEP-DEC
PY 2007
VL 4
IS 3-4
BP 158
EP 164
DI 10.1016/j.diin.2007.10.002
PG 7
WC Computer Science, Information Systems; Computer Science,
Interdisciplinary Applications
SC Computer Science
GA 293YY
UT WOS:000255372500024
ER
PT J
AU Corporan, E
DeWitt, MJ
Belovich, V
Pawlik, R
Lynch, AC
Gord, JR
Meyer, TR
AF Corporan, Edwin
DeWitt, Matthew J.
Belovich, Vincent
Pawlik, Robert
Lynch, Amy C.
Gord, James R.
Meyer, Terrence R.
TI Emissions characteristics of a turbine engine and research combustor
burning a Fischer-Tropsch jet fuel
SO ENERGY & FUELS
LA English
DT Article
ID DIESEL
AB The emissions characteristics of two combustion platforms, a T63 turboshaft engine and an atmospheric swirl-stabilized research combustor, fueled with conventional military jet fuel (JP-8), a natural-gas-derived Fischer-Tropsch synthetic jet fuel (also referred herein as synjet or FT), and blends of the two were investigated. Nonvolatile particulate matter (PM) and gaseous emissions were analyzed to assess the impacts of the aromatic and sulfur-free synjet fuel on the combustion products of the two platforms. The engine was operated at two power settings, and the combustor at several equivalence ratios, to evaluate the emission production over a wide range of combustion temperatures. Conventional aerosol instrumentation was used to quantify particle number (PN), size, and PM mass emissions, while a Fourier Transform Infrared analyzer was used to quantify the gaseous species. Planar laser-induced fluorescence and laser-induced incandescence techniques were employed on the research combustor to study the effects of the FT fuel on the formation and oxidation of particles in the combustor primary zone. Test results show dramatic reductions in particle concentrations and mean size on both combustion platforms with the neat FT and synjet fuel blends relative to operation with JP-8. Reductions of over 90% in PN were observed on both platforms for several operating conditions with neat FT fuel. For the engine, over an 80% reduction in smoke number was observed with neat synjet relative to operation on JP-8. As expected, reductions in sulfur oxide emissions and slight increases in water vapor (measured only in the atmospheric combustor) resulted due to the sulfur-free nature and higher hydrogeri-to-carbon ratio of the synthetic fuel. Minor impacts were observed for other gaseous emissions. American Society for Testing and Materials fuel specification tests showed that JP-8/synjet blends up to 50/50% by volume satisfied the JP-8 military fuel requirements and that only the minimum specific gravity requirement was not satisfied at higher synjet concentrations. Impacts of the synjet fuel on the emissions of the atmospheric combustor and the T63 engine, a comparison of emissions between the two platforms, and results of in situ laser-based measurements in the combustor reaction zone are discussed.
C1 AFRL, PRTG, Wright Patterson AFB, OH 45433 USA.
Univ Dayton, Res Inst, Dayton, OH 45469 USA.
Iowa State Univ, Ames, IA 50011 USA.
RP Corporan, E (reprint author), AFRL, PRTG, Loop Rd N Bldg 490, Wright Patterson AFB, OH 45433 USA.
EM edwin.corporan@wpafb.af.mil
RI Meyer, Terrence/F-1556-2011
NR 38
TC 74
Z9 74
U1 4
U2 19
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0887-0624
J9 ENERG FUEL
JI Energy Fuels
PD SEP-OCT
PY 2007
VL 21
IS 5
BP 2615
EP 2626
DI 10.1021/ef070015j
PG 12
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA 212PC
UT WOS:000249608300019
ER
PT J
AU Beesley, R
Robinson, R
Propst, A
Arthur, N
Retzloff, M
AF Beesley, R.
Robinson, R.
Propst, A.
Arthur, N.
Retzloff, M.
TI Impact of day 3 or day 5 embryo transfer on pregnancy rates and multiple
gestations.
SO FERTILITY AND STERILITY
LA English
DT Meeting Abstract
CT 63rd Annual Meeting of the American-Society-for-Reproductive-Medicine
CY OCT 13-17, 2007
CL Washington, DC
SP Amer Soc Reproduct Med
C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
NR 0
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 0015-0282
J9 FERTIL STERIL
JI Fertil. Steril.
PD SEP
PY 2007
VL 88
SU 1
BP S329
EP S329
DI 10.1016/j.fertnstert.2007.07.1102
PG 1
WC Obstetrics & Gynecology; Reproductive Biology
SC Obstetrics & Gynecology; Reproductive Biology
GA 216PC
UT WOS:000249889800942
ER
PT J
AU Propst, AM
Thoppil, JJ
Groll, JM
Frattarelli, JL
Robinson, RD
Retzloff, MG
AF Propst, A. M.
Thoppil, J. J.
Groll, J. M.
Frattarelli, J. L.
Robinson, R. D.
Retzloff, M. G.
TI Pre-ovulatory vs. ovulatory intrauterine insemination in controlled
ovarian hyperstimulation cycles.
SO FERTILITY AND STERILITY
LA English
DT Meeting Abstract
CT 63rd Annual Meeting of the American-Society-for-Reproductive-Medicine
CY OCT 13-17, 2007
CL Washington, DC
SP Amer Soc Reproduct Med
C1 Wilford Hall USAF Med Ctr, San Antonio, TX USA.
Wright Patterson Med Ctr, Dayton, OH USA.
Tripler Army Med Ctr, Obstet & Gynecol, Honolulu, HI USA.
Keesler Med Ctr, Biloxi, MS USA.
NR 0
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 0015-0282
J9 FERTIL STERIL
JI Fertil. Steril.
PD SEP
PY 2007
VL 88
SU 1
BP S172
EP S173
DI 10.1016/j.fertnstert.2007.07.597
PG 2
WC Obstetrics & Gynecology; Reproductive Biology
SC Obstetrics & Gynecology; Reproductive Biology
GA 216PC
UT WOS:000249889800477
ER
PT J
AU Endriss, DA
Hellgren, EC
Fox, SF
Moody, RW
AF Endriss, Debora A.
Hellgren, Eric C.
Fox, Stanley F.
Moody, Raymond W.
TI Demography of an urban population of the Texas horned lizard (Phrynosoma
cohnutum) in central Oklahoma
SO HERPETOLOGICA
LA English
DT Article
DE clutch size; demography; life-table analysis; Phrynosoma cornutum;
survival; texas horned lizard
ID COMPARATIVE LIFE-HISTORY; HABITAT FRAGMENTATION; BERGMANNS RULE;
SCELOPORUS-UNDULATUS; UTA-STANSBURIANA; SOUTHERN TEXAS; CORNUTUM;
ECTOTHERMS; SURVIVAL; ECOLOGY
AB The dynamics of reptile populations in urban landscapes are poorly understood. We studied demography of an urban population of the Texas homed lizard (Phrynosoma cornutum), a species that apparently declines in abundance following urban development but may persist in localized areas. We located and captured lizards within an urban reserve at Tinker Air Force Base, Oklahoma, from June 2003 to October 2005. Lizards were monitored using radiotelemetry, and data were collected on morphometrics, survival, and reproduction. These data were applied to a life-table analysis that estimated the hatchling survival rate necessary to maintain a stable population. Females were larger than males in adult and juvenile cohorts. Mark-recapture sessions resulted in estimates (+/- 1 SE) of 53 +/- 11 individuals in the population and a density of 5.00 +/- 1.04 lizards/ha. Annual rates of survival were estimated to be 0.59-0.70 for adult lizards and 0.45 for juvenile lizards. Mean (+/- 1 SE) clutch size was 17.4 +/- 0.8 eggs, incubation periods ranged from 49 to 68 days, and 60% of nests survived to hatching. Assuming a single clutch per year, fecundity of adult females was 5.22 female hatchlings/female/year. From application of Euler's equation, the hatchling survival rate needed for population stability ranged from 0.19 to 0.25. Relative to other, more southerly populations of P. cornutum, our study population had higher survival but lower reproductive rates. Reduced reproduction was likely due to latitudinal trends associated with body size, but we could not separate confounded influences of urban environment and latitude on survival. Relative to other phrynosomatine lizards, Texas horned lizards in our study population were characterized by high survival, moderate reproductive output, and delayed maturation.
C1 So Illinois Univ, Dept Zool, Cooperat Wildlife Res Lab, Carbondale, IL 62901 USA.
Oklahoma State Univ, Dept Zool, Stillwater, OK 74078 USA.
Oklahoma State Univ, Oklahoma Cooperat Fish & Wildlife Res Unit, Stillwater, OK 74078 USA.
Nat Resource Program, Tinker AFB, OK 73145 USA.
RP Hellgren, EC (reprint author), So Illinois Univ, Dept Zool, Cooperat Wildlife Res Lab, Mailcode 6504, Carbondale, IL 62901 USA.
EM hellgren@siu.edu
OI Hellgren, Eric/0000-0002-3870-472X
NR 51
TC 11
Z9 12
U1 7
U2 45
PU HERPETOLOGISTS LEAGUE
PI EMPORIA
PA EMPORIA STATE UNIV, DIVISION BIOLOGICAL SCIENCES, 1200 COMMERCIAL ST,
EMPORIA, KS 66801-5087 USA
SN 0018-0831
J9 HERPETOLOGICA
JI Herpetologica
PD SEP
PY 2007
VL 63
IS 3
BP 320
EP 331
DI 10.1655/0018-0831(2007)63[320:DOAUPO]2.0.CO;2
PG 12
WC Zoology
SC Zoology
GA 220CA
UT WOS:000250133300009
ER
PT J
AU Brothers, MD
Wilber, RL
Byrnes, WC
AF Brothers, Michael D.
Wilber, Randall L.
Byrnes, William C.
TI Physical fitness and Hematological changes during acclimatization to
moderate altitude: A retrospective study
SO HIGH ALTITUDE MEDICINE & BIOLOGY
LA English
DT Article
DE hypobaric hypoxia; altitude acclimatization; long-term moderate altitude
exposure; erythropoiesis
ID HIGH-TRAINING LOW; RED-CELL VOLUME; HEMOGLOBIN MASS; PERFORMANCE
CAPACITY; EXERCISE PERFORMANCE; INDIVIDUAL VARIATION; DISTANCE RUNNERS;
OXYGEN-TRANSPORT; MUSCLE; HYPOXIA
AB Brothers, Michael D., Randall L. Wilber, and William C. Byrnes. Physical fitness and hematological changes during acclimatization to moderate altitude: A retrospective study. High Alt. Med. Biol. 8:213-224, 2007.-While high altitude adaptations have been studied extensively, limited research has examined moderate altitude (MA: 1500 to 3000 m) adaptations and their time course, despite the fact that millions of people sojourn to or reside at MA. We retrospectively examined long-term MA acclimatization by analyzing recurring physical fitness test results and hematological data among 2147 college-age male cadets previously residing at either sea level (SL) or MA and currently attending the U.S. Air Force Academy (USAFA), a unique, regimented, and well-controlled military university located at 2210 m. Significant (p < 0.01) differences were found in aerobic and anaerobic fitness test scores between former SL and MA subjects, with MA subjects scoring 27 points (8%) higher during a 1.5-mile aerobic fitness run and 18 points (6%) higher than SL subjects in the anaerobic fitness test for 2 yr. These differences may be partly explained by the hematological differences observed. Hemoglobin concentration ([Hb]) was significantly (p < 0.001) higher (6.3%; similar to 1 g/dL) in MA subjects prior to arrival at USAFA and acutely, but the difference between altitude conditions was gone at the next retrospective blood draw (+17 months). After 2.5 yr at USAFA, former SL residents had significantly (p < 0.001) higher [Hb] by +10%, or 1.5 g/dL versus prearrival values. This study suggests that significant hematological acclimatization occurs with MA exposure and requires greater than 7 months to reach stability. The altitude-induced erythropoiesis may explain in part the improvements in aerobic performance, but altitude-related anaerobic differences still remain after hematological acclimatization.
C1 USAF Acad, AHML, Human Performance Lab, Colorado Springs, CO 80840 USA.
Univ Colorado, Dept Integrat Physiol, Boulder, CO 80309 USA.
US Olymp Training Ctr, Colorado Springs, CO USA.
RP Brothers, MD (reprint author), USAF Acad, AHML, Human Performance Lab, 2169 Field House Dr, Colorado Springs, CO 80840 USA.
EM michael-brothers@colorado.edu
NR 34
TC 11
Z9 11
U1 0
U2 5
PU MARY ANN LIEBERT INC
PI NEW ROCHELLE
PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA
SN 1527-0297
J9 HIGH ALT MED BIOL
JI High Alt. Med. Biol.
PD FAL
PY 2007
VL 8
IS 3
BP 213
EP 224
DI 10.1089/ham.2007.8308
PG 12
WC Biophysics; Public, Environmental & Occupational Health; Sport Sciences
SC Biophysics; Public, Environmental & Occupational Health; Sport Sciences
GA 209XF
UT WOS:000249420600006
PM 17824822
ER
PT J
AU Mullins, BE
Lacey, TH
Mills, RF
Trechter, JM
Bass, SD
AF Mullins, Barry E.
Lacey, Timothy H.
Mills, Robert F.
Trechter, Joseph M.
Bass, Samuel D.
TI How the Cyber Defense Exercise shaped an information-assurance
curriculum
SO IEEE SECURITY & PRIVACY
LA English
DT Article
C1 USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
RP Mullins, BE (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
EM barry.mullins@afit.edu; timothy.lacey.ctr@afit.edu;
robert.miils@afit.edu; joseph.trechter@pentagon.af.mil;
somuel.bass@js.pentagon.mil
NR 13
TC 4
Z9 4
U1 0
U2 2
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 1540-7993
J9 IEEE SECUR PRIV
JI IEEE Secur. Priv.
PD SEP-OCT
PY 2007
VL 5
IS 5
BP 40
EP 49
DI 10.1109/MSP.2007.111
PG 10
WC Computer Science, Information Systems; Computer Science, Software
Engineering
SC Computer Science
GA 217JT
UT WOS:000249944900009
ER
PT J
AU Gustafson, SC
Parker, DR
Martin, RK
AF Gustafson, Steven C.
Parker, David R.
Martin, Richard K.
TI Cardinal interpolation
SO IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE
LA English
DT Article
DE Bayesian statistics; interpolation; modeling and prediction; probability
and statistics; regression
ID KERNEL REGRESSION; NETWORKS
AB A Bayesian probability density for an interpolating function is developed, and its desirable properties and practical potential are demonstrated. This density has an often needed but previously unachieved property, here called cardinal interpolation, which ensures extrapolation to the density of the least-squares linear model. In particular, the mean of the cardinal interpolation density is a smooth function that intersects given (x, y) points and which extrapolates to their least-squares line, and the variance of this density is a smooth function that is zero at the point x values, that increases with distance from the nearest point x value, and that extrapolates to the well-known quadratic variance function for the least-squares line. The new cardinal interpolation density is developed for Gaussian radial basis interpolators using fully Bayesian methods that optimize interpolator smoothness. This optimization determines the basis function widths and yields an interpolating density that is non-Gaussian except for large magnitude x and which is therefore not the outcome of a Gaussian process. Further, new development shows that the salient property of extrapolation to the density of the least-squares linear model can be achieved for more general approximating (not just interpolating) functions.
C1 USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Gustafson, SC (reprint author), USAF, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM steven.gustafson@afit.edu; david.parker2@wpafb.af.mil;
richard.martin@afit.edu
NR 27
TC 0
Z9 0
U1 0
U2 2
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 0162-8828
EI 1939-3539
J9 IEEE T PATTERN ANAL
JI IEEE Trans. Pattern Anal. Mach. Intell.
PD SEP
PY 2007
VL 29
IS 9
BP 1538
EP 1545
DI 10.1109/TPAMI.2007.1170
PG 8
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA 189CD
UT WOS:000247965600004
PM 17627042
ER
PT J
AU Morrissey, RJ
Golden, PJ
AF Morrissey, Ryan J.
Golden, Patrick J.
TI Fatigue strength of a single crystal in the gigacycle regime
SO INTERNATIONAL JOURNAL OF FATIGUE
LA English
DT Article; Proceedings Paper
CT 6th International Conference on Fatique Damage of Structural Materials
CY SEP 17-22, 2006
CL Hyannis, MA
SP Off Naval Res Headquarters, USA Res Lab, Off Naval Res Global
DE superalloy; high cycle fatigue; ultrasonic
ID FREQUENCY
AB The objective of this work is to investigate the fatigue behavior of a single crystal nickel-based superalloy in the gigacycle regime. Testing from 10(6) to 10(9) cycles at 593 degrees C was performed using an ultrasonic fatigue system operating at 20 kHz. Multiple tests were performed at stresses near the fatigue limit to determine the variability in fatigue life in this regime. Endurance limit results were compared to similar data generated on conventional servohydraulic test systems to determine if there are any frequency effects. Scanning electron microscopy was then used to determine the initiation sites and the failure mechanisms. Initial results indicate little or no frequency effect on the fatigue strength or failure mechanisms of PWA 1484 at 593 degrees C. (C) 2007 Published by Elsevier Ltd.
C1 USAF, Res Lab, MLLMN, Wright Patterson AFB, OH 45433 USA.
RP Morrissey, RJ (reprint author), USAF, Res Lab, MLLMN, Wright Patterson AFB, OH 45433 USA.
EM Ryan.Morrissey@wpafb.af.mil
NR 9
TC 4
Z9 5
U1 0
U2 1
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0142-1123
J9 INT J FATIGUE
JI Int. J. Fatigue
PD SEP-NOV
PY 2007
VL 29
IS 9-11
BP 2079
EP 2084
DI 10.1016/j.ijfatigue.2007.04.003
PG 6
WC Engineering, Mechanical; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA 215YO
UT WOS:000249845100058
ER
PT J
AU Zineddin, M
Krauthammer, T
AF Zineddin, M.
Krauthammer, T.
TI Dynamic response and behavior of reinforced concrete slabs under impact
loading
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article
DE slabs; impact loading; drop heights; soft impact; precision tests
AB Reinforced concrete slabs are among the most common structural elements. In spite of the large number of slabs designed and built, the effect of their details on their behavior under impact loads are not always appreciated or properly taken into account. This experimental study was aimed at understanding the dynamic behavior of structural concrete slabs under impact loading to improve the state of the art of protective design. This study investigated the effects of different types of slab reinforcements and the applied impact loads on the dynamic response and behavior of reinforced concrete slabs.
Three different types of 90 x 1524 x 3353 mm (3-1/2" x 5' x 11') slabs were tested, as follows: First; using two 152 x 152 mm (6" x 6") meshes of welded steel wires located under 25 mm (1") of concrete cover on both faces of the slab; second, with one 152 x 152 mm (6" x 6") mesh of No. 3 steel bars located at the middle of the slab thickness; and third, with two 152 x 152 mm (6" x 6") meshes of No. 3 steel bars located under 25 mm (1") of concrete cover on both faces of the slab. The drop heights of the impact weight were 152, 305, and 610 mm (6", 12", and 24"), respectively. Published by Elsevier Ltd.
C1 USAF Acad, DFCE, Dept Civil & Environm Engn, Colorado Springs, CO 80840 USA.
Univ Florida, Ctr Infrastruct Protect & Phys Secur, Gainesville, FL 32611 USA.
RP Zineddin, M (reprint author), USAF Acad, DFCE, Dept Civil & Environm Engn, 2354 Fairchild Dr,Suite 6H-173,HQ USAFA, Colorado Springs, CO 80840 USA.
EM mohamad.zineddin@usafa.af.mil; tedk@ufl.edu
NR 1
TC 41
Z9 50
U1 3
U2 14
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD SEP
PY 2007
VL 34
IS 9
BP 1517
EP 1534
DI 10.1016/j.ijimpeng.2006.10.012
PG 18
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 174KD
UT WOS:000246939900005
ER
PT J
AU Chiu, YH
Gaeta, G
Levandier, DJ
Dressler, RA
Boatz, JA
AF Chiu, Y.-H.
Gaeta, G.
Levandier, D. J.
Dressler, R. A.
Boatz, J. A.
TI Vacuum electrospray ionization study of the ionic liquid, [Emim][Im]
SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE electrospray; ionic liquid; Taylor cone; electrochemistry;
ethyl-methyl-imidazolium ion
ID TAYLOR CONES; ELECTRONIC-STRUCTURE; MASS-SPECTROMETRY; BASIS-SET;
EVAPORATION; FIELD; DROPLETS; PROPULSION; ENERGIES; SURFACES
AB An analysis is presented of positive and negative vacuum electrospray currents from the ionic liquid, [Emim][Im], wetted on a sharp tungsten needle. The source is operated in a cone-jet configuration established with a low extraction voltage of approximately +/- 1 kV. Emission current and mass flow are measured as a function of the emitter angle with respect to the instrument axis. Mass spectra of field evaporated ions and mass-resolved energy distributions of emitted charges are recorded as a function of emitter angle. The measurements at both source polarities indicate that the cone-jet emits a mixture of ions and charged droplets. While the charged droplets are emitted with a narrow angular distribution centered on axis, the angular distributions of ions are significantly broader than those of the droplets and centered off axis. Pure ion emission is observed at emission angles larger than similar to 15 degrees. The main mass spectral peaks are from X-+/-{[Emim] [Im]}(n), ions (X = Emim or Im for positive and negative polarities, respectively) with n = 0, 1, and 2. Quantum chemical calculations of the n = 0 and I ions and the isolated ion pairs are presented, yielding thermochemical information on the observed ionic species. The present results demonstrate that the cone-jet emits droplets from the tip of the jet, and provide direct evidence that ions are produced in an Iribarne-Thomson field-evaporation mechanism at the transition region between the Taylor cone and jet. Electrochemical modification of the cone-jet emitter properties are observed when maintaining the emitter at a positive polarity for a prolonged (minutes to hours) period. New ions emerge consisting of clusters containing a neutralized Im(-). The associated current suppression can be mitigated through polarity alternation at 1 Hz. Measurements are also presented with the tungsten needle heated to 373 K, thereby reducing the liquid viscosity and increasing the flow rate. The average mass of the droplets is observed to increase with temperature while the mass distributions of the ions are not found to change noticeably. Published by Elsevier B.V.
C1 Hanscom AFB, AF Res Lab, Space Vehicles Directorate, Bedford, MA 01731 USA.
Boston Coll, Inst Sci Res, Chestnut Hill, MA 02159 USA.
Edwards AFB, Propuls Directorate, AF Res Lab, Edwards AFB, CA 93524 USA.
RP Chiu, YH (reprint author), Hanscom AFB, AF Res Lab, Space Vehicles Directorate, Bedford, MA 01731 USA.
EM Yu-Hui.Chiu@Hanscom.af.mil
NR 44
TC 27
Z9 27
U1 1
U2 22
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1387-3806
EI 1873-2798
J9 INT J MASS SPECTROM
JI Int. J. Mass Spectrom.
PD SEP 1
PY 2007
VL 265
IS 2-3
BP 146
EP 158
DI 10.1016/j.ijms.2007.02.010
PG 13
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA 202XA
UT WOS:000248936500008
ER
PT J
AU Groeber, M
Ghosh, S
Uchic, MD
Dimiduk, DM
AF Groeber, Michael
Ghosh, Somnath
Uchic, Michael D.
Dimiduk, Dennis M.
TI Developing a robust 3-d characterization representation framework for
modeling polycrystalline materials
SO JOM
LA English
DT Article
ID CRYSTAL PLASTICITY; MICROSTRUCTURAL CHARACTERIZATION; 3-DIMENSIONAL
MICROSTRUCTURES; FIB-SEM; DEFORMATION; SECTION; GRAINS; STEELS
AB This paper introduces a methodology for generating virtual grain-level microstructural volumes for computational modeling and simulation. The methodology, which allows for the incorporation of higher-fidelity descriptions of microstructures depends upon robust three-dimensional data collection, detailed microstructural quantification, and virtual microstructure generation using microstructural-based constraints.
C1 Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA.
Ohio State Univ, Dept Mech Engn, Columbus, OH 43210 USA.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Groeber, M (reprint author), Ohio State Univ, Dept Mat Sci & Engn, 477 Coll Rd, Columbus, OH 43210 USA.
EM groeber.9@osu.edu
RI Ghosh, Somnath/A-2867-2012
NR 29
TC 13
Z9 13
U1 0
U2 5
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1047-4838
J9 JOM-US
JI JOM
PD SEP
PY 2007
VL 59
IS 9
BP 32
EP 36
DI 10.1007/s11837-007-0113-5
PG 5
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Mineralogy; Mining & Mineral Processing
SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy;
Mining & Mineral Processing
GA 208LZ
UT WOS:000249322100004
ER
PT J
AU Gebbie, DA
Reeder, MF
Tyler, C
Fonov, V
Crafton, J
AF Gebbie, David A.
Reeder, Mark F.
Tyler, Charles
Fonov, Vladimir
Crafton, Jim
TI Lift and drag characteristics of a blended-wing body aircraft
SO JOURNAL OF AIRCRAFT
LA English
DT Article; Proceedings Paper
CT AIAA 23rd Applied Aerodynamics Conference
CY JUN 06-09, 2005
CL Toronto, CANADA
SP AIAA
AB The aerodynamic characteristics of a blended-wing body aircraft were assessed in the Air Force Institute of Technology low-speed wind tunnel. The scaled-down model (Re-c similar to 10(5) and M = 0.10 to 0.20) of a strike tanker consisted of a shaped fuselage and slender, sweptback wings. The model evaluation and analysis process included force and moment measurements acquired from a wind-tunnel balance along with complementary pressure sensitive paint measurements and computational fluid dynamics solutions for a few cases. The force and moment coefficient data suggested that the aircraft is affected by both vortex lift and potential How lift mechanisms. This was manifested in an apparent stall mechanism with a significant dependence on airspeed. One of the most intriguing aspects of the results was the striking difference in the force and moment measurements before and after the paint was applied to the surface. Although the roughness for both models was below the threshold suggested by 2-D boundary layer theory for all data acquired, the application of the paint led to a clear and repeatable effect on the force coefficient data. The lift slope was steeper and the onset of stall, when it occurred, was sudden across the entire wing for sufficiently smooth models. By contrast, the lift slope was reduced and stall was indicated only through a mild change in lift slope for the measurements corresponding to the rougher surface.
C1 USAF, Inst Technol, AFRL PRTT, Wright Patterson AFB, OH 45433 USA.
USAF, Res Lab, AFRL VAAC, Wright Patterson AFB, OH 45433 USA.
Innovat Sci Solut Inc, Dayton, OH 45440 USA.
RP Gebbie, DA (reprint author), USAF, Inst Technol, AFRL PRTT, Wright Patterson AFB, OH 45433 USA.
NR 19
TC 2
Z9 2
U1 0
U2 7
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
J9 J AIRCRAFT
JI J. Aircr.
PD SEP-OCT
PY 2007
VL 44
IS 5
BP 1409
EP 1421
DI 10.2514/1.22356
PG 13
WC Engineering, Aerospace
SC Engineering
GA 223IK
UT WOS:000250363300001
ER
PT J
AU Shearer, CM
Cesnik, CES
AF Shearer, Christopher M.
Cesnik, Carlos E. S.
TI Nonlinear flight dynamics of very flexible aircraft
SO JOURNAL OF AIRCRAFT
LA English
DT Article; Proceedings Paper
CT AIAA Atmospheric Flight Mechanics Conference
CY AUG 15-18, 2005
CL San Francisco, CA
SP Amer Inst Aeronaut & Astronaut
ID GENERALIZED-ALPHA METHOD; ASPECT-RATIO WINGS; AEROELASTICITY; FUTURE;
FLOW
AB This paper focuses on the characterization of the response of a very flexible aircraft in flight. The six-degree-of-freedom equations of motion of a reference point on the aircraft are coupled with the aeroelastic equations that govern the geometrically nonlinear structural response of the vehicle. A low-order strain-based nonlinear structural analysis coupled with unsteady finite state potential-flow aerodynamics form the basis for the aeroelastic model. The nonlinear beam structural model assumes constant strain over an element in extension, twist, and in/out-of-plane bending. The geometrically nonlinear structural formulation, the finite state aerodynamic model, and the nonlinear rigid-body equations together provide a low-order complete nonlinear aircraft analysis tool. The equations of motion are integrated using an implicit modified Newmark method. The method incorporates both first- and second-order nonlinear equations without the necessity of transforming the equations to first order and incorporates a Newton-Raphson subiteration scheme at each time step. Using the developed tool, analyses and simulations can be conducted that encompass nonlinear rigid-body, nonlinear rigid-body coupled with linearized structural solutions, and full nonlinear rigid-body and structural solutions. Simulations are presented that highlight the importance of nonlinear structural modeling compared with rigid-body and linearized structural analyses in a representative high-altitude long-endurance vehicle. Results show significant differences in the three reference point axes (pitch, roll, and yaw) not previously captured by linearized or rigid-body approaches. The simulations using both full and empty fuel states include level gliding descent, low-pass-filtered square aileron, input rolling/gliding descent, and low-pass square elevator input gliding descent. Results are compared for rigid-body, linearized structural, and nonlinear structural response.
C1 Univ Michigan, Ann Arbor, MI 48109 USA.
RP Shearer, CM (reprint author), USAF, Inst Technol, Dayton, OH USA.
EM christopher.shearer@afit.edu; cesnik@umich.edu
NR 45
TC 44
Z9 47
U1 1
U2 9
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
J9 J AIRCRAFT
JI J. Aircr.
PD SEP-OCT
PY 2007
VL 44
IS 5
BP 1528
EP 1545
DI 10.2514/1.27606
PG 18
WC Engineering, Aerospace
SC Engineering
GA 223IK
UT WOS:000250363300012
ER
PT J
AU Schwertner, HA
Rios, DC
AF Schwertner, Harvey A.
Rios, Deborah C.
TI High-performance liquid chromatographic analysis of 6-gingerol,
8-gingerol, 10-gingerol, and 6-shogaol in ginger-containing dietary
supplements, spices, teas, and beverages
SO JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL
AND LIFE SCIENCES
LA English
DT Article
DE HPLC analysis; ginger dietary supplements; 6-Gingerol; 6-Shogaol;
8-Gingerol; 10-Gingerol; ginger spices; ginger beverages
ID PREGNANCY-INDUCED NAUSEA; ZINGIBERIS-RHIZOMA; CONTROLLED-TRIAL;
CONSTITUENTS; PRINCIPLES; EXTRACT
AB Ginger root powder is widely used as a dietary supplement as well as a spice and flavoring agent in foods and beverages. In this study, we developed a high-performance liquid chromatographic (HPLC) method that is suitable for the analysis of 6-gingerol, 6-shogaol, 8-gingerol, and 10-gingerol in a wide variety of ginger-containing dietary supplements, spices, teas, mints, and beverages. 6-Gingerol, 6-shogaol, 8-gingerol, and 10-gingerol were extracted from various ginger-containing products with ethyl acetate and analyzed by HPLC on a C-8 reversed phase column at 282 nm. The recoveries of 6-, 8-, and 10-gingerol, and 6-shogaol from the ginger dietary supplements and ginger-containing products were 94.7 +/- 4.1, 93.6 +/- 3.4, 94.9 +/- 4.0, 97.1 +/- 3.8%, respectively. The within-day coefficients of variation for 6-gingerol, 6-shogaol, 8-gingerol, and 10-gingerol standards at 50.0 mu g/mL were 2.54, 2.38, 2.55, and 2.31%, respectively. The lower limit of quantitation was 25ng injected. The standard curves for 6-, 8-, and 10-gingerol and 6-shogaol were linear from 10.0 to 1000 mu g/mL. The variation (CV's) in the 6-gingerol, 6-shogaol, 8-gingerol, and 10-gingerol concentrations of nine different ginger root dietary supplements were 115.2, 45.7, 72.3, and 141.7%, respectively. The gingerol composition of various ginger-containing spices, teas, and beverages also were found to vary widely. The proposed method can be used for the analysis and standardization of 6-, 8-, and 10-gingerol in ginger-containing dietary supplements, spices, food products and beverages and as a method for deter-mining the amounts of 6-shogaol as a marker for 6-gingerol stability. Published by Elsevier B.V.
C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
RP Schwertner, HA (reprint author), 2200 Bergquist Dr, Lackland AFB, TX 78236 USA.
EM harvey.schwertner@lackland.af.mil
NR 18
TC 54
Z9 57
U1 5
U2 33
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1570-0232
J9 J CHROMATOGR B
JI J. Chromatogr. B
PD SEP 1
PY 2007
VL 856
IS 1-2
BP 41
EP 47
DI 10.1016/j.jchromb.2007.05.011
PG 7
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 212RS
UT WOS:000249615100007
PM 17561453
ER
PT J
AU Osswald, SS
Kulick, KB
Tomaszewski, MM
Sperling, LC
AF Osswald, Sandra S.
Kulick, Kevin B.
Tomaszewski, Maria-Magdalena
Sperling, Leonard C.
TI Viral-associated trichodysplasia in a patient with lymphoma: a case
report and review
SO JOURNAL OF CUTANEOUS PATHOLOGY
LA English
DT Review
ID SPINULOSA
AB Viral-associated trichodysplasia is a recently described entity associated with immunosuppression. We describe a 68-year-old man with a history of treated lymphoma who developed numerous, disfiguring, papular and spiny lesions involving most of the central face. Both facial and body alopecia was noted. Histopathologic findings of a facial papule showed dramatic alterations of the hair bulbs, including bulbar distention, lack of hair shaft formation and a marked expansion of inner root sheath type epithelium. These findings were identical to those of previously described cases, so electron microscopy was performed. Numerous intranuclear virus particles were identified. Shortly after the diagnosis of trichodysplasia was made, the patient was found to have a relapse of his lymphoma, which may represent the source of his immunosuppression. Based on his skin biopsy findings, successful antiviral therapy was initiated. This case and a review of previously reported cases are discussed in this study.
Osswald SS, Kulick KB, Tomaszewski M-M, Sperling LC. Viral-associated trichodysplasia in a patient with lymphoma: a case report and review. (c) Blackwell Munksgaard 2007.
C1 Brooke Army Med Ctr, USAF, Dept Dermatol, Ft Sam Houston, TX 78234 USA.
SUNY Buffalo, Sch Med & Biomed Sci, Dept Dermatol, Buffalo, NY 14260 USA.
Armed Forces Inst Pathol, Dept Dermatopathol, Washington, DC 20306 USA.
Uniformed Serv Univ Hlth Sci, Dept Dermatol, Bethesda, MD 20814 USA.
RP Osswald, SS (reprint author), Brooke Army Med Ctr, USAF, Dept Dermatol, Ft Sam Houston, TX 78234 USA.
EM ssosswald@aol.com
NR 6
TC 35
Z9 35
U1 0
U2 1
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0303-6987
J9 J CUTAN PATHOL
JI J. Cutan. Pathol.
PD SEP
PY 2007
VL 34
IS 9
BP 721
EP 725
DI 10.1111/j.1600-0560.2006.00693.x
PG 5
WC Dermatology; Pathology
SC Dermatology; Pathology
GA 203IR
UT WOS:000248968800010
PM 17696921
ER
PT J
AU Shima, T
Rasmussen, SJ
Chandler, P
AF Shima, Tal
Rasmussen, Steven J.
Chandler, Phillip
TI UAV team decision and control using efficient collaborative estimation
SO JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE
ASME
LA English
DT Article
ID COORDINATION; CONSTRAINT; AGENTS
AB A novel decision-estimation methodology for a team of agents cooperating under communication imperfections is presented. The scenario of interest is that of a group of uninhabited aerial vehicles (UAVs) cooperatively performing, under communication delays, multiple tasks oil multiple ground targets. In the proposed architecture, each UAV in the group runs an identical centralized decision algorithm and multiple information filters in parallel oil its own states, its teammates' states, and its own states as viewed by its teammates. Under perfect information, the decision architecture allows implicit coordination. Under imperfect information, the estimation of team members' states enables predicting their cost to prosecute new tasks. Thus, the group performance under communication imperfections can be improved. Two different algorithms arc, proposed for the estimation process. The first is communication efficient, in which asynchronous information updates are sent to the network by individual members based on the value of the information to the rest of the group. The second is computation efficient utilizing synchronous information updates. Taking into account that the plan and plant of each UAV are known to the group improves the overall estimation process. Utilizing the MULTIUAV2 simulation testbed, a Monte Carlo study is presented. The benefit of using the proposed algorithms is shown with regard to the target prosecution rate and the communication bandwidth required for cooperation.
C1 Technion Israel Inst Technol, Dept Aerosp Engn, IL-32000 Haifa, Israel.
USAF, Res Lab, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
RP Shima, T (reprint author), Technion Israel Inst Technol, Dept Aerosp Engn, IL-32000 Haifa, Israel.
EM tal.shima@technion.ac.il; steven.rasmussen@wpafb.af.mil;
phillip.chandler@wpafb.af.mil
NR 40
TC 17
Z9 19
U1 2
U2 13
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0022-0434
J9 J DYN SYST-T ASME
JI J. Dyn. Syst. Meas. Control-Trans. ASME
PD SEP
PY 2007
VL 129
IS 5
BP 609
EP 619
DI 10.1115/1.2764504
PG 11
WC Automation & Control Systems; Instruments & Instrumentation
SC Automation & Control Systems; Instruments & Instrumentation
GA 213ZH
UT WOS:000249705300005
ER
PT J
AU Berg, GE
Ta'ala, SC
Kontanis, EJ
Leney, SS
AF Berg, Gregory E.
Ta'ala, Sabrina C.
Kontanis, Elias J.
Leney, Sardiaa S.
TI Measuring the intercondylar shelf angle using radiographs: Intra- and
inter-observer error tests of reliability
SO JOURNAL OF FORENSIC SCIENCES
LA English
DT Article
DE forensic science; forensic anthropology; intercondylar shelf angle;
reliability; racial determination; distal femur
ID UTILITY; FEMUR; RACE
AB This study presents a test of intra- and inter-observer measurement error rates of the intercondylar shelf angle of the distal femur, as measured on lateral radiographs. This measurement is the central element of a method to determine racial affiliation from the distal femur. Four observers independently radiographed a set of 33 complete and partial femora from collections housed at the Joint POW/MIA Accounting Command, Central Identification Laboratory. Each observer then measured the intercondylar shelf angles in each radiograph, following the original method's guidelines. A supplementary inter-observer error test was conducted by four additional observers on one set of radiographs. Statistically significant differences were found for both intra- and inter-observer error based on the results of Student's t-tests, paired samples t-tests, and ANOVA analyses. The results of this study indicate that further experimentation should be undertaken in order to develop refined measurement techniques that may help improve standardization and reduce the observer error rates.
C1 JPAC, CIL, Hickam AFB, HI 96853 USA.
RP Berg, GE (reprint author), JPAC, CIL, 310 Worchester Ave, Hickam AFB, HI 96853 USA.
EM greg.berg@ds.jpac.pacom.mil
NR 9
TC 1
Z9 1
U1 1
U2 1
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0022-1198
J9 J FORENSIC SCI
JI J. Forensic Sci.
PD SEP
PY 2007
VL 52
IS 5
BP 1020
EP 1024
DI 10.1111/j.1556-4029.2007.00509.x
PG 5
WC Medicine, Legal
SC Legal Medicine
GA 208LT
UT WOS:000249321500003
PM 17645489
ER
PT J
AU Irwin, JA
Edson, SM
Loreille, O
Just, RS
Barritt, SM
Lee, DA
Holland, TD
Parsons, TJ
Leney, MD
AF Irwin, Jodi A.
Edson, Suni M.
Loreille, Odile
Just, Rebecca S.
Barritt, Suzanne M.
Lee, Demris A.
Holland, Thomas D.
Parsons, Thomas J.
Leney, Mark D.
TI DNA identification of "Earthquake McGoon" 50 years postmortem
SO JOURNAL OF FORENSIC SCIENCES
LA English
DT Article
DE forensic science; DNA typing; low copy number; Y chromosome; single
nucleotide polymorphism; mitochondrial DNA; short tandem repeat;
degraded skeletal remains
ID GENOME
AB This report describes the genetic identification of James "Earthquake McGoon" McGovern, a WWII fighter ace who perished in Laos while providing supplies to French troops during the French Indochina war. Because reference samples were unavailable for all of the potential casualties, testing of the entire mitochondrial genome, autosomal STRs and Y-chromosomal STRs was performed to increase the genetic information available for analysis. Kinship analyses performed on the evidentiary data and numerous indirect family references for McGovern excluded other possible casualties and definitively established McGovern's identity. This particular case demonstrates the practical utility of novel research technologies and aggressive genetic typing protocols in the identification of aged, degraded remains.
C1 AFIP Annex, Armed Forces Inst Pathol, Armed Forces DNA Identificat Lab, Rockville, MD 20850 USA.
Joint POW MIA Accounting Command, Cent Identificat Lab, Hickam AFB, HI 96853 USA.
RP Irwin, JA (reprint author), AFIP Annex, Armed Forces Inst Pathol, Armed Forces DNA Identificat Lab, 1413 Res Blvd, Rockville, MD 20850 USA.
EM jodi.a.irwin@us.army.mil
NR 10
TC 13
Z9 13
U1 0
U2 1
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0022-1198
J9 J FORENSIC SCI
JI J. Forensic Sci.
PD SEP
PY 2007
VL 52
IS 5
BP 1115
EP 1118
DI 10.1111/j.1556-4029.2007.00506.x
PG 4
WC Medicine, Legal
SC Legal Medicine
GA 208LT
UT WOS:000249321500019
PM 17645740
ER
PT J
AU Kish, BA
Jacques, DR
Pachter, M
AF Kish, Brian A.
Jacques, David R.
Pachter, Meir
TI Optimal control of sensor threshold for autonomous wide-area-search
munitions
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article; Proceedings Paper
CT AIAA Guidance, Navigation and Control Conference
CY AUG 15-18, 2005
CL San Francisco, CA
SP AIAA
AB The optimal employment of autonomous wide-area-search munitions is addressed. The scenario considered involves an airborne munition searching a battle space for stationary targets in the presence of false targets. Targets are modeled with uniform, Poisson, and normal distributions. False targets are modeled with Poisson distributions. All relevant parameters can be extracted from intelligence information on the enemy's order of battle and the sensor performance specification. Analytic weapon-effectiveness measures are derived using applied probability theory. The effectiveness measures derived in this paper handle time-varying parameters that characterize the battle-space environment and the performance of the munition's sensor. This allows the formulation and solution of optimization problems that maximize the probability of a target attack while constraining the probability of a false-target attack. Optimal schedules for controlling the sensor threshold during the flight are derived and compared with the optimal constant-threshold results. An increase in weapon effectiveness is demonstrated when the sensor threshold is dynamically controlled during the flight.
C1 USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Kish, BA (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
OI Kish, Brian/0000-0002-7131-060X
NR 6
TC 6
Z9 8
U1 0
U2 1
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD SEP-OCT
PY 2007
VL 30
IS 5
BP 1239
EP 1248
DI 10.2514/1.18782
PG 10
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 213XQ
UT WOS:000249701000003
ER
PT J
AU McNeely, RL
Iyer, RV
Chandler, PR
AF McNeely, Rachelle L.
Iyer, Ram V.
Chandler, Phillip R.
TI Tour planning for an unmanned air vehicle under wind conditions
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
AB A very important subproblem in the task assignment problem for unmanned air vehicles is the evaluation of costs for the state transitions of a directed graph. Usually a Dubins vehicle flying in the absence of wind is considered in the computation of costs. However, when a prevailing wind vector field is considered, the costs taken on very different values and the task assignment problem can have very different solutions. In this paper, we consider the problem of constructing minimum-time trajectories for a Dubins vehicle in the presence of a time-varying wind vector field. We present results on the existence and uniqueness of minimum-time solutions for a Dubins vehicle flying in a general time-varying wind vector field under some technical conditions. These results extend the conclusions of the well-known Dubins theorem. We also propose an algorithm for obtaining the minimum-time solution for an unmanned air vehicle and prove its convergence. We also present the results of numerical experiments that show that the importance of considering wind vector fields while planning the tour for an unmanned air vehicle.
C1 Texas Tech Univ, Dept Math & Stat, Lubbock, TX 79409 USA.
USAF, Res Lab, Wright Patterson AFB, Wright Patterson AFB, OH 45433 USA.
RP McNeely, RL (reprint author), Texas Tech Univ, Dept Math & Stat, Lubbock, TX 79409 USA.
EM rachelle.mcneely@ttu.edu; ram.iyer@ttu.edu;
phillip.chandler@wpafb.af.mil
NR 18
TC 23
Z9 23
U1 1
U2 2
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD SEP-OCT
PY 2007
VL 30
IS 5
BP 1299
EP 1306
DI 10.2514/1.26055
PG 8
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 213XQ
UT WOS:000249701000009
ER
PT J
AU Dogan, A
Kim, E
Blake, W
AF Dogan, Atilla
Kim, Eunyoung
Blake, William
TI Control and simulation of relative motion for aerial refueling in
racetrack maneuvers
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article; Proceedings Paper
CT AIAA Guidance, Navigation, and Control Conference
CY AUG 21-24, 2006
CL Keystone, CO
C1 Univ Texas, Dept Mech & Aerosp Engn, Arlington, TX 76019 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Dogan, A (reprint author), Univ Texas, Dept Mech & Aerosp Engn, Arlington, TX 76019 USA.
OI Dogan, Atilla/0000-0002-6283-2086
NR 5
TC 17
Z9 20
U1 0
U2 3
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0731-5090
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD SEP-OCT
PY 2007
VL 30
IS 5
BP 1551
EP 1557
DI 10.2514/1.29487
PG 7
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 213XQ
UT WOS:000249701000037
ER
PT J
AU Evans, DR
Cook, G
AF Evans, D. R.
Cook, G.
TI Bragg-matched photorefractive two-beam coupling in organic-inorganic
hybrids
SO JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS
LA English
DT Article
DE hybrid; photorefractive; liquid crystals; beam coupling
ID HIGH-GAIN; PRE-TILT; LIQUID; AMPLIFICATION; NIOBATE; LIGHT
AB This review article presents the concept of photorefractive beam coupling in hybrid photorefractive cells comprising a liquid crystal layer adjacent to inorganic photorefractive windows. The roles of the liquid crystal layer and the photorefractive windows, as well as the overall advantages of this architecture, are explained. The mechanism involved and the required window parameters to break the local alignment symmetry in order to achieve Bragg-matched two-beam coupling in a liquid crystal layer are discussed.
C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
Universal Technol Corp, Dayton, OH 45432 USA.
RP Evans, DR (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM dean.evans@wpafb.af.mil
NR 14
TC 19
Z9 19
U1 0
U2 4
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0218-8635
J9 J NONLINEAR OPT PHYS
JI J. Nonlinear Opt. Phys. Mater.
PD SEP
PY 2007
VL 16
IS 3
BP 271
EP 280
DI 10.1142/S0218863507003767
PG 10
WC Optics; Physics, Applied
SC Optics; Physics
GA 232FQ
UT WOS:000251004100001
ER
PT J
AU Slabaugh, MA
Bents, RT
Tokish, JM
AF Slabaugh, Mark A.
Bents, Robert T.
Tokish, John M.
TI Timing of return of subscapularis function in open capsular shift
patients
SO JOURNAL OF SHOULDER AND ELBOW SURGERY
LA English
DT Article
ID TOTAL SHOULDER REPLACEMENT; LIFT-OFF TEST; ISOLATED RUPTURE; ROTATOR
CUFF; MUSCLE; TENDON; VALIDATION; REPAIR
AB Loss of subscapularis function can be a significant complication after any surgery that involves its tenotomy. Recently, this complication has received more recognition after anterior approaches for shoulder replacement. It is unclear, however, whether this occurs in younger patients, and if so, how long it persists postoperatively. This study investigated the time it takes for subscapularis function to return after open tenotomy in young patients with instability. Sixteen consecutive patients underwent an anterior stabilization procedure for glenohumeral instability in which the subscapularis was taken down to perform an anterior capsular shift. Each patient was followed up prospectively for return of subscapularis function as determined by the belly-press and lift-off tests. The average time for subscapularis function to return was 8.4 weeks for the lift-off test and 8.8 weeks for the belly-press test. All patients had a negative belly-press test by 12 weeks and a negative lift-off test by 20 weeks.
C1 Orthopaed Ctr Sports Med, Rockville, MD USA.
USAFA Hosp, Colorado Springs, CO 80840 USA.
RP Slabaugh, MA (reprint author), 1050 W Perimeter Rd,79th MSGS-SGCXO, Andrews AFB, MD 20762 USA.
EM mark.slabaugh@andrews.af.mil
NR 12
TC 3
Z9 3
U1 0
U2 1
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1058-2746
J9 J SHOULDER ELB SURG
JI J. Shoulder Elbow Surg.
PD SEP-OCT
PY 2007
VL 16
IS 5
BP 544
EP 547
DI 10.1016/j.jse.2006.11.005
PG 4
WC Orthopedics; Sport Sciences; Surgery
SC Orthopedics; Sport Sciences; Surgery
GA 220IX
UT WOS:000250151500008
PM 17583539
ER
PT J
AU Lane, SA
Kennedy, S
Richard, R
AF Lane, Steven A.
Kennedy, Scott
Richard, Robert
TI Noise transmission studies of an advanced grid-stiffened composite
fairing
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
ID LAUNCH VEHICLE ACOUSTICS
AB Interior fairing noise is an important consideration for payload launch survivability and has been studied extensively since the beginning of the space program. This work presents acoustic transmission studies conducted by the Air Force Research Laboratory, Space Vehicles Directorate, on a composite, grid-stiffened, Minotaur payload fairing. These tests were performed in an acoustics laboratory and examined the effects of acoustic flanking paths, the thermal protection system, and melamine-type acoustic blanket treatments on fairing noise. The data showed that acoustic flanking paths significantly increase noise transmission, especially at low frequency. The bare fairing with thermal protection system provided approximately 14 dB of noise reduction over the 5000 Hz bandwidth relative to external levels. Acoustic blanket performance was measured as a function of bandwidth, surface area coverage, and mass. It was observed that small amounts of treatment (2 kg) significantly increased noise reduction (3.6 dB), even at low frequency.
C1 USAF, Res Lab, Kirtland AFB, NM 87117 USA.
CSA Engn, Albuquerque, NM 87123 USA.
Boeing SVS, Albuquerque, NM 87109 USA.
RP Lane, SA (reprint author), USAF, Res Lab, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
EM steven.lane@kirtiand.af.mil
NR 20
TC 2
Z9 5
U1 0
U2 0
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD SEP-OCT
PY 2007
VL 44
IS 5
BP 1131
EP 1139
DI 10.2514/1.28590
PG 9
WC Engineering, Aerospace
SC Engineering
GA 223YF
UT WOS:000250411400014
ER
PT J
AU Iyer, N
Brungart, DS
Simpson, BD
AF Iyer, Nandini
Brungart, Douglas S.
Simpson, Brian D.
TI Effects of periodic masker interruption on the intelligibility of
interrupted speech
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID 2 SIMULTANEOUS TALKERS; SPATIAL SEPARATION; ENERGETIC MASKING; NOISE;
CONTINUITY; PERCEPTION; IDENTIFICATION; FREQUENCY; THRESHOLD; TONES
AB When listeners hear a target signal in the presence of competing sounds, they are quite good at extracting information at instances when the local signal-to-noise ratio of the target is most favorable. Previous research suggests that listeners can easily understand a periodically interrupted taraet when it is interleaved with noise. It is not clear if this ability extends to the case where an interrupted target is alternated with a speech masker rather than noise. This study examined speech intelligibility in the presence of noise or speech maskers, which were either continuous or interrupted at one of six rates between 4 and 128 Hz. Results indicated that with noise maskers, listeners performed significantly better with interrupted, rather than continuous maskers. With speech maskers, however, performance was better in continuous, rather than interrupted masker conditions. Presumably the listeners used continuity as a cue to distinguish the continuous masker from the interrupted target. Intelligibility in the interrupted masker condition was improved by introducing a pitch difference between the target and speech masker. These results highlight the role that taroet-masker differences in continuity and pitch play in the segregation of competing speech signals.
C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Iyer, N (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM nandini.iyer@wpafb.af.mil
NR 27
TC 9
Z9 9
U1 0
U2 2
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 SEP
PY 2007
VL 122
IS 3
BP 1693
EP 1701
DI 10.1121/1.2756177
PG 9
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 208LV
UT WOS:000249321700037
PM 17927429
ER
PT J
AU Brungart, DS
Simpson, BD
AF Brungart, Douglas S.
Simpson, Brian D.
TI Effect of target-masker similarity on across-ear interference in a
dichotic cocktail-party listening task
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID SPEECH-INTELLIGIBILITY; INFORMATIONAL MASKING; ATTENTION
AB Similarity between the target and masking voices is known to have a strong influence on performance in monaural and binaural selective attention tasks, but little is known about the role it might play in dichotic listening tasks with a target signal and one masking voice in the one ear and a second independent masking voice in the opposite ear. This experiment examined performance in a dichotic listening task with a target talker in one ear and same-talker, same-sex, or different-sex maskers in both the target and the unattended ears. The results indicate that listeners were most susceptible to across-ear interference with a different-sex within-ear masker and least susceptible with a same-talker within-ear masker, suggesting that the amount of across-ear interference cannot be predicted from the difficulty of selectively attending to the within-ear masking voice. The results also show that the amount of across-ear interference consistently increases when the acros s-ear masking voice is more similar to the target speech than the within-ear masking voice is, but that no corresponding decline in across-ear interference occurs when the across-ear voice is less'similar to the target than the within-ear voice. These results are consistent with an "integrated strategy" model of speech perception where the listener chooses a segregation strategy based on the characteristics of the masker present in the target ear and the amount of across-ear interference is determined by the extent to which this strategy can also effectively be used to suppress the masker in the unattended ear.
C1 USAF, Wright Patterson AFB, OH 45433 USA.
RP Brungart, DS (reprint author), USAF, Wright Patterson AFB, OH 45433 USA.
EM douglas.brungart@wpafb.af.mil
NR 18
TC 18
Z9 18
U1 0
U2 6
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 SEP
PY 2007
VL 122
IS 3
BP 1724
EP 1734
DI 10.1121/1.2756797
PG 11
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 208LV
UT WOS:000249321700040
PM 17927432
ER
PT J
AU Shalita, EA
Wells, RD
AF Shalita, Eric A.
Wells, Ryan D.
TI Treatment of yellow scorpion (Leiurus quinquestriatus) sting: A case
report
SO JOURNAL OF THE AMERICAN PHARMACISTS ASSOCIATION
LA English
DT Article
DE scorpion envenomation; antivenin agents; case report
ID ENVENOMATION; CHILDREN
AB Objectives: To report the treatment given to a 26-year-old Air Force medic who was stung twice by a yellow scorpion (Leiurus quinquestriatus) while stationed in Iraq and to describe the problems and issues related to the use of the scorpion antivenin.
Patient case: The patient presented 2 hours after envenomation to the local military treatment facility, where she was minimally symptomatic initially. Shortness of breath and anxiety developed, and the patient was sedated, intubated, and evacuated to a large Air Force medical facility for more advanced care. Vasopressor support was required during flight. At the medical facility, antivenin was administered, and the patient's cardiac condition was stabilized with norepinephrine drip, mild hydration, and vasopressor support. A second dose of antivenin diluted in sodium chloride and further pressor support were required. ST-segment depression eventually resolved, and the patient was gradually taken off norepinephrine and extubated. She recovered fully within 2 weeks and returned to active duty.
Discussion: Because the antivenin used is not licensed by the Food and Drug Administration, informed consent was needed; however, it could not be obtained because the patient was unconscious, intubated, and in a life-or-death situation. Antivenin selection is based on the species of scorpion and symptom severity; therefore, the scorpion should be, with great care, killed for identification. In the military setting, inventory control, storage, and accountability are vital issues surrounding antivenin use, and these are discussed in this article.
Conclusion: Immediate action and effective communication, along with timely antivenin administration and well-equipped intensive care facilities, were integral in saving the life of this victim of a yellow scorpion envenomation. All level 3 facilities in Southwest Asia must be familiar with ordering, administering, and documenting this antivenin because it is difficult to obtain and infrequently available.
C1 [Shalita, Eric A.; Wells, Ryan D.] 332nd Expeditionary Med Grp, Emergency Dept, Balad Air Base, Iraq.
RP Shalita, EA (reprint author), 99 MDSS SGSP,4700 Las Vegas Blvd, Nellis AFB, NV 89191 USA.
EM eric.shalita@nellis.af.mil
NR 9
TC 5
Z9 5
U1 1
U2 2
PU AMER PHARMACEUTICAL ASSOC
PI WASHINGTON
PA 2215 CONSTITUTION AVE NW, WASHINGTON, DC 20037 USA
SN 1544-3191
J9 J AM PHARM ASSOC
JI J. Am. Pharm. Assoc.
PD SEP-OCT
PY 2007
VL 47
IS 5
BP 616
EP 619
DI 10.1331/JAPhA.2007.07051
PG 4
WC Pharmacology & Pharmacy
SC Pharmacology & Pharmacy
GA 266QR
UT WOS:000253452600013
PM 17848352
ER
PT J
AU Thomas, JP
Montheillet, F
Semiatin, SL
AF Thomas, J. P.
Montheillet, F.
Semiatin, S. L.
TI A geometric framework for mesoscale models of recrystallization
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID PARTICLE STIMULATED NUCLEATION; DYNAMIC RECRYSTALLIZATION;
CELLULAR-AUTOMATA; SIMULATION; NICKEL; INGOT
AB Geometric aspects are a major issue in models of recrystallization that rely on statistical grain-population descriptions, because the growth of recrystallized grains has to be compensated by the loss of volume of deformed grains, thus leading to concomitant variations in all geometric variables. A geometric framework for such models was thus designed. It is based on mesostructure units (MSUs), each of which represents an aggregate of similar grains. The evolution of MSUs is controlled by two kinds of inputs, nucleation rates and grain-boundary velocities, from which the evolution of microstructure is described in an internally consistent fashion. The geometric framework was applied initially to the necklace recrystallization of fine-grain microstructures, viz., the usual form of recrystallization comprising nucleation on initial grain boundaries. It was extended to describe particle-stimulated nucleation (PSN) in order to treat geometric effects related to intragranular recrystallization, as is found in coarse ingot microstructures. For both the necklace-only and necklace-and-PSN cases, test cases using simple inputs were performed to validate the behavior of the geometric framework.
C1 United Technol Corp, Dayton, OH 45432 USA.
Ecole Natl Super Mines, Ctr SMS, CNRS, UMR 5146, F-42023 St Etienne 2, France.
USAF, Mat & Mfg Directorate, AFRL MLLP, Wright Patterson AFB, OH 45433 USA.
RP Thomas, JP (reprint author), United Technol Corp, Dayton, OH 45432 USA.
EM lee.semiatin@wpafb.af.mil
RI SEMIATIN, SHELDON/E-7264-2017
NR 16
TC 8
Z9 8
U1 0
U2 5
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD SEP
PY 2007
VL 38A
IS 9
BP 2095
EP 2109
DI 10.1007/s11661-007-9247-x
PG 15
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 211QR
UT WOS:000249538900027
ER
PT J
AU Stringham, JM
Hammond, BR
AF Stringham, James M.
Hammond, Billy R., Jr.
TI The glare hypothesis of macular pigment function
SO OPTOMETRY AND VISION SCIENCE
LA English
DT Article
DE visual function assessment/performance; visual optics; visual science;
spatial vision and contrast sensitivity; physiology and biochemistry
ID HETEROCHROMATIC FLICKER PHOTOMETRY; CONTRAST SENSITIVITY;
SPATIAL-DISTRIBUTION; OPTICAL-DENSITY; DEGENERATION; PHOTOPHOBIA;
FILTERS; DISEASE; LIGHT; EYES
AB Purpose. Discomfort and reduced visual performance due to glaring light conditions are common complaints for most individuals. Past studies have shown that macular pigment (MP) reduces discomfort due to glare. In this study, we evaluated whether MP was related to visual performance under glare conditions.
Methods. Thirty-six healthy subjects participated (age range, 18 to 41). Spatial profiles of MP optical density were measured using heterochromatic flicker photometry with a Newtonian-view macular densitometer. Photostress recovery and grating visibility under veiling conditions were assessed in a Maxwellian-view optical system. Both experiments used six monochromatic lights (from 440 to 620 nm) and a broadband xenon white. For the veiling glare experiment, subjects fixated a 1 degrees-diameter disk containing a black and white 100% contrast grating stimulus. The intensity of an annulus (the glare source) with an 11 degrees inner and 12 degrees outer diameter was adjusted by the subject until the grating stimulus was no longer seen. For the photostress recovery experiment, the time required to detect a 1 degrees-diameter grating stimulus (detailed above) after a 5-s exposure to a 2.5 mu W/cm(2), 5 degrees-diameter disk was recorded. Both central and eccentric (10 degrees temporal retina) viewing conditions were assessed.
Results. MP at 30 ' eccentricity ranged from 0.08 to 1.04 OD, and was found to dramatically reduce the deleterious effects of glare. Visual thresholds under glare conditions were strongly related to MP density (e.g., r = 0.76, p = 0.0001 when using white light). Photostress recovery time, after exposure to xenon-white light, was significantly shorter for subjects with higher MP levels (r = -0.79, p = 0.0001). Both photostress recovery and veiling glare functions were well-described by the photopic spectral sensitivity function (V-lambda).
Conclusions. MP is strongly related to improvements in glare disability and photostress recovery in a manner consistent with its spectral absorption and spatial profile.
C1 Univ Georgia, Vis Sci Lab, Athens, GA 30602 USA.
RP Stringham, JM (reprint author), USAF, Res Lab, Northrop Grumman Corp, Brooks AFB, TX USA.
EM bhammond@uga.edu
NR 25
TC 66
Z9 66
U1 0
U2 11
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1040-5488
J9 OPTOMETRY VISION SCI
JI Optom. Vis. Sci.
PD SEP
PY 2007
VL 84
IS 9
BP 859
EP 864
PG 6
WC Ophthalmology
SC Ophthalmology
GA 212NN
UT WOS:000249604200006
PM 17873771
ER
PT J
AU Hivnor, CM
Yan, AC
Honig, PJ
AF Hivnor, Chad M.
Yan, Albert C.
Honig, Paul J.
TI Acne arising in an epidermal nevus
SO PEDIATRIC DERMATOLOGY
LA English
DT Article
AB Epidermal nevi are benign congenital lesions that follow Blaschko lines. Epidermal nevi can demonstrate a variety of histologic patterns and contain hamartomatous hyperplasia of any epidermal or adnexal structure. We present the first reported instance of acne arising strictly within a preexisting keratinocytic epidermal nevus during puberty, which is a demonstration of genetic mosaicism in pilosebaceous units.
C1 USAF, Nellis AFB, NV 89191 USA.
Univ Penn, Sch Med, Dept Dermatol, Philadelphia, PA 19104 USA.
Childrens Hosp Philadelphia, Dept Pediat, Dermatol Sect, Philadelphia, PA 19104 USA.
RP Hivnor, CM (reprint author), USAF, 4700 N Las Vegas Blvd, Nellis AFB, NV 89191 USA.
NR 5
TC 3
Z9 4
U1 0
U2 0
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0736-8046
J9 PEDIATR DERMATOL
JI Pediatr. Dermatol.
PD SEP-OCT
PY 2007
VL 24
IS 5
BP 534
EP 535
DI 10.1111/j.1525-1470.2007.00511.x
PG 2
WC Dermatology; Pediatrics
SC Dermatology; Pediatrics
GA 236QO
UT WOS:000251318700015
PM 17958804
ER
PT J
AU Digeronimo, RJ
Mustafa, SB
Ryan, RM
Sternberg, ZZ
Ashton, DJ
Seidner, SR
AF Digeronimo, Robert J.
Mustafa, Shamimunisa B.
Ryan, Rita M.
Sternberg, Zohara Z.
Ashton, Daniel J.
Seidner, Steven R.
TI Mechanical ventilation down-regulates surfactant protein a and
keratinocyte growth factor expression in premature rabbits
SO PEDIATRIC RESEARCH
LA English
DT Article
ID RESPIRATORY-DISTRESS-SYNDROME; EPITHELIAL-CELLS; FETAL LUNG; SP-B;
BRONCHOPULMONARY DYSPLASIA; GENE-EXPRESSION; IN-VITRO; SP-C; INJURY;
CORTICOSTEROIDS
AB Surfactant-associated proteins (SP-A, SP-B, and SP-C) are critical for the endogenous function of surfactant. Keratinocyte growth factor (KGF) and vascular endothelial growth factor (VEGF) are key regulators of lung development. The objective of this study was to evaluate the effects of early mechanical ventilation on the expression of these important regulatory proteins in a preterm, rabbit model. Premature fetuses were delivered at 29 d of gestation and randomized to necropsy at birth, i.e. no ventilation (NV), spontaneous breathing (SB), or mechanical ventilation (MV) for 16 h. MV animals were further randomized to treatment with dexamethasone (dex). Our findings showed that SB rabbits increased their expression of SP-A mRNA and protein after birth compared with NV controls. MV significantly attenuated this response in the absence of dex. Exposure to dex elevated SP-B mRNA expression in both SB and MV rabbits. KGF protein levels were markedly increased in SB animals compared with MV counterparts. VEGF levels were similar in SB and MV animals, but were significantly increased compared with NV controls. These data suggest that MV alters surfactant-associated protein and growth factor expression, which may contribute to injury in the developing lung.
C1 USAF, Med Ctr, Dept Pediat, Lackland AFB, TX 78236 USA.
Univ Texas, Hlth Sci Ctr, San Antonio, TX 78229 USA.
SUNY Buffalo, Dept Pediat, Buffalo, NY 14222 USA.
RP Digeronimo, RJ (reprint author), 2220 Bergquist Dr,Suite 1,859 MDOS MMNP, Lackland AFB, TX 78236 USA.
EM Robert.DiGeronimo@lackland.af.mil
NR 40
TC 9
Z9 10
U1 1
U2 4
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 0031-3998
EI 1530-0447
J9 PEDIATR RES
JI Pediatr. Res.
PD SEP
PY 2007
VL 62
IS 3
BP 277
EP 282
DI 10.1203/PDR.0b013e3181256aeb
PG 6
WC Pediatrics
SC Pediatrics
GA 203KJ
UT WOS:000248973200009
PM 17622950
ER
PT J
AU Harville, DL
AF Harville, Donald L.
TI Mastering virtual teams, 3rd edition
SO PERSONNEL PSYCHOLOGY
LA English
DT Book Review
C1 AF Res Lab, Brooks City Base, TX 78235 USA.
RP Harville, DL (reprint author), AF Res Lab, Brooks City Base, TX 78235 USA.
NR 2
TC 0
Z9 0
U1 3
U2 6
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0031-5826
J9 PERS PSYCHOL
JI Pers. Psychol.
PD FAL
PY 2007
VL 60
IS 3
BP 790
EP 793
PG 4
WC Psychology, Applied; Management
SC Psychology; Business & Economics
GA 215WY
UT WOS:000249840900015
ER
PT J
AU Clark, BM
Homeyer, DC
Glass, KR
D'Avignon, LC
AF Clark, Brychan M.
Homeyer, Diane C.
Glass, Kristen R.
D'Avignon, Laurie C.
TI Clindamycin-induced Sweet's syndrome
SO PHARMACOTHERAPY
LA English
DT Article; Proceedings Paper
CT Scientific Meeting of the American-College-of-Physicians
CY NOV 16, 2006
CL Arlington, VA
SP Amer Coll Phys, Army Chapter
DE clindamycin; Sweet's syndrome; acute febrile neutrophilic; dermatosis
ID FEBRILE NEUTROPHILIC DERMATOSIS; ADVERSE DRUG-REACTIONS; PATIENT;
MANIFESTATIONS; DIAGNOSIS; LEUKEMIA; CRITERIA; DISEASE
AB Drug-induced acute febrile neutrophilic dermatosis, or Sweet's syndrome, is rare and, to our knowledge, has not previously been associated with clindamycin therapy We describe a 47-year-old woman with type 2 diabetes mellitus and end-stage renal disease requiring hemodialysis who developed Sweet's syndrome after receiving oral and intravenous clindamycin for a tooth infection. After the clindamycin was discontinued, the patient's clinical symptoms resolved over several days. Use of the Naranjo adverse drug reaction probability scale indicated a probable relationship between the patient's development of Sweet's syndrome and clindamycin therapy. Clinicians should be aware that Sweet's syndrome can occur with clindamycin treatment. Early recognition of this condition in conjunction with cessation of drug exposure, with or without antiinflammatory therapy, can produce complete recovery.
C1 Wilford Hall USAF Med Ctr, Dept Infect Dis, Lackland AFB, TX 78236 USA.
Wilford Hall USAF Med Ctr, Dept Internal Med, Lackland AFB, TX 78236 USA.
RP Clark, BM (reprint author), Wilford Hall USAF Med Ctr, Dept Infect Dis, 759 MDOS MMII,220 Bergquist Dr,Suite 1,, Lackland AFB, TX 78236 USA.
EM Brychan.Clark@lackland.af.mil
NR 31
TC 6
Z9 8
U1 1
U2 2
PU PHARMACOTHERAPY PUBLICATIONS INC
PI BOSTON
PA NEW ENGLAND MEDICAL CENTER, 806, 750 WASHINGTON ST, BOSTON, MA 02111 USA
SN 0277-0008
J9 PHARMACOTHERAPY
JI Pharmacotherapy
PD SEP
PY 2007
VL 27
IS 9
BP 1343
EP 1346
DI 10.1592/phco.27.9.1343
PG 4
WC Pharmacology & Pharmacy
SC Pharmacology & Pharmacy
GA 204SC
UT WOS:000249063300015
PM 17723089
ER
PT J
AU Travis, WJ
Combs-Orme, T
AF Travis, Wendy J.
Combs-Orme, Terri
TI Resilient parenting: Overcoming poor parental bonding
SO SOCIAL WORK RESEARCH
LA English
DT Article
DE infants; latent cluster analysis; parenting; resilience
ID ADULT ATTACHMENT INTERVIEW; INTERGENERATIONAL TRANSMISSION; MEDIATIONAL
ANALYSIS; HOME INVENTORY; SELF-EFFICACY; CHILD-ABUSE; MOTHERS; STRESS;
INSTRUMENT; BEHAVIOR
AB This study identified groups of mothers with varying patterns of adaptive functioning and bonds with their own parents. These patterns were related to mothers' parenting of their own children to understand how some mothers avoid repeating the cycle of poor parenting. Data from 210 new mothers were analyzed before hospital discharge about bonding with their caregivers during childhood and six to 12 months later about adaptive functioning, life circumstances, and parenting. Latent cluster analysis identified four distinct groups of mothers with regard to parental bonds and adaptive functioning: positive-adaptive mothers (good bonding and good adaptive functioning), positive-maladaptive mothers (good bonding and poor adaptive functioning), resilient mothers (poor bonding and good adaptive functioning), and vulnerable mothers (poor bonding and poor adaptive functioning). Despite poor parental bonds, resilient mothers were coping as well as the positive-adaptive mothers and were significantly less likely to experience parenting stress related to the parenting role, unsatisfying interactions with their infants, and attributions of their children as difficult to care for. Some mothers were able to overcome poor bonds with their own caregivers to develop good adaptive functioning in adulthood and provide good parenting to their own children.
C1 Robins AFB, Warner Robins, GA 31098 USA.
Univ Tennessee, Knoxville, TN 37996 USA.
RP Travis, WJ (reprint author), Robins AFB, Warner Robins, GA 31098 USA.
EM tcombs-orme@utk.edu
NR 53
TC 5
Z9 5
U1 3
U2 17
PU NATL ASSOC SOCIAL WORKERS
PI WASHINGTON
PA 750 FIRST ST, NE, STE 700, WASHINGTON, DC 20002-4241 USA
SN 1070-5309
J9 SOC WORK RES
JI Soc. Work Res.
PD SEP
PY 2007
VL 31
IS 3
BP 135
EP 149
PG 15
WC Social Work
SC Social Work
GA 213OY
UT WOS:000249678200002
ER
PT J
AU Polak, M
Kvitkovic, J
Mozola, P
Usak, E
Barnes, PN
Levin, GA
AF Polak, M.
Kvitkovic, J.
Mozola, P.
Usak, E.
Barnes, P. N.
Levin, G. A.
TI Frequency dependence of hysteresis loss in YBCO tapes
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT Conference on Flux Pinning and Other Related Phenomena in Type-II
Superconductors
CY SEP 30, 2007
CL Univ Cambridge, Cambridge, ENGLAND
HO Univ Cambridge
ID AC-LOSSES; COATED CONDUCTORS; MAGNETIC-FIELD; SUPERCONDUCTORS; STRIP
AB We measured the frequency dependence of hysteresis loss in non-striated and striated YBCO coated conductors in the frequency range from 1 mHz up to 350 mHz at 77 K. At these frequencies the coupling losses in YBCO coated conductors do not exist and in filamentary YBCO tapes they can be practically neglected. The dominant loss component is the hysteresis loss. We have found that for magnetic fields above the full penetration field the hysteresis loss increases with increasing frequency and this dependence can be described by a power law function. For magnetic fields below the penetration field the hysteresis loss decreases with frequency. This behaviour supports the previous theoretical results indicating that the field dividing the behaviour of hysteresis losses versus frequency is the penetration field. The experiments with YBCO samples on non-metallic substrate at frequencies up to 600 Hz show that the dependence of hysteresis losses measured at millihertz frequencies can be extrapolated to higher frequencies of the order of 100 Hz. We propose a simple procedure to separate the hysteresis losses from the total measured losses based on the measurement of the frequency dependence of losses at low frequencies. Taking into account the frequency dependence of hysteresis losses we can considerably reduce the errors in the separation of hysteresis losses from the total measured losses.
C1 Slovak Acad Sci, Inst Elect Engn, Bratislava 84104, Slovakia.
Slovak Tech Univ Bratislava, FEI, Bratislava 812198, Slovakia.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Polak, M (reprint author), Slovak Acad Sci, Inst Elect Engn, Dubravska 9, Bratislava 84104, Slovakia.
NR 16
TC 10
Z9 10
U1 0
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD SEP
PY 2007
VL 20
IS 9
SI SI
BP S293
EP S298
DI 10.1088/0953-2048/20/9/S26
PG 6
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 212KW
UT WOS:000249596200027
ER
PT J
AU Konecki, EA
Pelltier, JP
AF Konecki, E. A.
Pelltier, J. P.
TI Dimethyl sulfoxide does not inhibit bacterial growth in PBSC processing
SO TRANSFUSION
LA English
DT Meeting Abstract
CT 60th Annual Meeting of the American-Association-of-Blood-Banks
CY OCT 20-23, 2007
CL Anaheim, CA
SP Amer Assoc Blood Banks
C1 Wilford Hall USAF Med Ctr, MDTS 859, MTLP, San Antonio, TX USA.
EM joseph.pelletier@tackland.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0041-1132
J9 TRANSFUSION
JI Transfusion
PD SEP
PY 2007
VL 47
IS 3
SU S
BP 41A
EP 41A
PG 1
WC Hematology
SC Hematology
GA 209OJ
UT WOS:000249397600115
ER
PT J
AU Bostock, DJ
Daley, JG
AF Bostock, Deborah J.
Daley, James G.
TI Lifetime and current sexual assault and harassment victimization rates
of active-duty united states air force women
SO VIOLENCE AGAINST WOMEN
LA English
DT Article
DE military women; sexual assault; sexual harassment; US Air Force
ID NAVY RECRUIT SAMPLE; US ARMY SOLDIERS; PREVALENCE; ABUSE; RAPE;
AGGRESSION; VETERANS; IMPACT; PTSD; WAR
AB From a stratified random sample, 2,018 active-duty United States Air Force women completed a telephone survey dealing with sexual assault and harassment. The lifetime prevalence of rape among Air Force women (28%) was more than twice as high as the prevalence in a national sample (13%). Nearly half of the military sample had been the victims of rape, molestation, or attempted sexual assault. The majority of both initial rapes (75%) and most recent rapes (56%) involved assault by civilians when the victims were civilians. Family members perpetrated 29% of initial rapes and 33% of most recent rapes. Regarding military status of the perpetrator, 14% of first-time victims were raped by a military member, 26% of multiple-time victims were raped by a military member, 31.8% of military women were sexually harassed by a military supervisor or boss, and 26.7% of military women were sexually harassed by a military coworker.
C1 Travis AFB, David Grant Med Ctr, Family Practice Residency Program, Fac Behav Med, Travis AFB, CA 94535 USA.
Indiana Univ, Sch Social Work, Indianapolis, IN USA.
RP Bostock, DJ (reprint author), Langley AFB, Med Grp 1, Langley AFB, VA 23665 USA.
NR 30
TC 20
Z9 20
U1 3
U2 15
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1077-8012
J9 VIOLENCE AGAINST WOM
JI Violence Against Women
PD SEP
PY 2007
VL 13
IS 9
BP 927
EP 944
DI 10.1177/1077801207305232
PG 18
WC Women's Studies
SC Women's Studies
GA 207VJ
UT WOS:000249278900005
PM 17704052
ER
PT J
AU Basu, S
Basu, S
Rich, FJ
Groves, KM
MacKenzie, E
Coker, C
Sahai, Y
Fagundes, PR
Becker-Guedes, F
AF Basu, S.
Basu, Su.
Rich, F. J.
Groves, K. M.
MacKenzie, E.
Coker, C.
Sahai, Y.
Fagundes, P. R.
Becker-Guedes, F.
TI Response of the equatorial ionosphere at dusk to penetration electric
fields during intense magnetic storms
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID SPREAD-F; JULY 15; DISTURBANCE DYNAMO; LOW LATITUDES; REGION; DENSITY;
DRIFTS; JICAMARCA; IONS
AB We investigate the response of the equatorial ionosphere at dusk to the intense magnetic storms of 30 October 2003 and 20 November 2003, different aspects of which have been widely studied by the community. We present here a very complete set of space and ground-based diagnostics that provide the vertical and latitudinal structures of the ionosphere within the South Atlantic magnetic anomaly (SAMA) region and the contiguous parts of South America and Africa. We show that for both storms, the dusk sector corresponding to the universal time ( UT) interval between the fast decrease of the SYM-H index and minimum SYM-H value determines uniquely the longitude interval populated by equatorial plasma bubbles and depletions. Further, we find that the UT of these storms is such that the ionospheric density perturbations occur in the SAMA region, which are most extended in latitude and altitude compared with other regions of the globe. In the dusk sector, the eastward penetration electric field, associated with rapid SYM-H decrease, adds to the postsunset eastward E-field because of the F region dynamo, which may be specially enhanced in this longitude interval because of the increased zonal conductivity gradient caused by energetic particle precipitation. This enhanced E-field at dusk causes a rapid uplift of the ionosphere and sets off plasma instabilities to form bubbles or bite-outs. The decreased ion density seen in the Defense Meteorological Satellite Program ( DMSP) in situ data at 840 km indicates that the ionospheric plasma has been lifted above the DMSP altitude and transported away from the region by diffusion along magnetic field lines. Plasma bubbles and bite-outs impact satellite communication and navigation systems by introducing scintillations and steep density gradients. This paper corroborates that intense magnetic storms follow the framework, developed by Su. Basu et al. ( 2001) for moderate storms, that specifies the longitude interval in which such disturbances are most likely to occur.
C1 USAF, Res Lab, Space Phys Directorate, Bedford, MA 01731 USA.
Boston Coll, Inst Sci Res, Chestnut Hill, MA USA.
Naval Res Lab, Washington, DC USA.
Univ Vale Paraiba, Sao Jose Dos Campos, Brazil.
RP Basu, S (reprint author), USAF, Res Lab, Space Phys Directorate, Bedford, MA 01731 USA.
EM sbasu@ssd5.nrl.navy.mil
RI Fagundes, Paulo/G-8758-2011; Sahai, Yogeshwar/C-4855-2012;
Becker-Guedes, Fabio/M-6911-2015
NR 35
TC 62
Z9 62
U1 1
U2 6
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD AUG 25
PY 2007
VL 112
IS A8
AR A08308
DI 10.1029/2006JA012192
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 204HR
UT WOS:000249035100001
ER
PT J
AU Wang, DH
Arlen, MJ
Baek, JB
Vaia, RA
Tan, LS
AF Wang, David H.
Arlen, Michael J.
Baek, Jong-Beom
Vaia, Richard A.
Tan, Loon-Seng
TI Nanocomposites derived from a low-color aromatic polyimide (CP2) and
amine-functionalized vapor-grown carbon nanofibers: In situ
polymerization and characterization
SO MACROMOLECULES
LA English
DT Article
ID POLYPHOSPHORIC ACID/P2O5; MECHANICAL-PROPERTIES; ELECTRIC PROPERTIES;
FREE-VOLUME; NANOTUBES; FILMS; ACID; COMPOSITES; SURFACE; POLYMERS
AB Vapor-grown carbon nanofibers (VGCNF) were functionalized with amine-containing pendants via a Friedel-Crafts acylation reaction with 4-(3-aminophenoxy)benzoic acid. The resulting H2N-VGCNF with relatively high degree of functionalization was in attendance during the synthesis of a polyimide (previously designated as CP2) from 2,2-bis(phthalic anhydride)-1,1,1,3,3,3-hexafluoroisopropane (6FDA) and 1,3-bis(3-aminophenoxy)benzene (APB) in N,N-dimethylacetamide (DMAc). Thus, a series of CP2-based nanocomposite films, which contained 0.18-9.19 wt % of H2N-VGCNF (corresponding to 0.10-5.0 wt % of basic VGCNF) were obtained using the conventional poly(amic acid) precursor method. For comparison purposes, the pristine VGCNF (0.10-5.0 wt %) was also used in the in situ polymerization of 6FDA and ABP. These two series of nanocomposite films were cast from the respective poly(amic acid)/VGCNF/DMAc solutions, followed by thermal imidization at curing temperatures up to 250 degrees C. The benefit and limitation of functionalized VGCNF on the length scale and the extent of CNF dispersion in a polyimide matrix were clear: (a) 0.18 wt % H2N-VGCNF-g-CP2 film was visually transparent whereas a similarly prepared (0.10 wt %) VGCNF/CP2 film showed the presence of large CNF aggregates throughout; (b) at 0.55 wt % H2N-VGCNF (equivalent to 0.30 wt % VGCNF) content, the nanocomposite film had become translucent, and at 9.19 wt % (equivalent to 5.0 wt % VGCNF), it was opaque. Since CP2 is very soluble in THF, the CP2-grafted VGCNF were simply separated from the free CP2 by solvent extraction. The molecular weights of the extracted CP2 were measured using gel-permeation chromatography (GPC). The effects of VGCNF on molecular weight (MW) and glass-transition (T-g) were discussed in terms of GPC and thermal analysis results, respectively. The dispersion of VGCNF in CP2 was evaluated using scanning electron microscopy (SEM). The tensile properties of these nanocomposite films were determined, showing up to 45% increase in modulus.
C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA.
Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA.
Chungbuk Natl Univ, Dept Ind Chem, Chungbuk 361763, South Korea.
USAF, Res Lab, Mat & Mfg Directorate, Polymer Branch,AFRL MLBP, Wright Patterson AFB, OH 45433 USA.
RP Tan, LS (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
EM loon-seng.tan@wpafb.af.mil
RI Wang, David/F-7492-2013; Baek, Jong-Beom/E-5883-2010; Tan,
Loon-Seng/F-6985-2012
OI Wang, David/0000-0001-6710-7265; Baek, Jong-Beom/0000-0003-4785-2326;
Tan, Loon-Seng/0000-0002-2134-9290
NR 61
TC 36
Z9 36
U1 2
U2 28
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD AUG 21
PY 2007
VL 40
IS 17
BP 6100
EP 6111
DI 10.1021/ma070157c
PG 12
WC Polymer Science
SC Polymer Science
GA 199JR
UT WOS:000248692600013
ER
PT J
AU Saleh, MA
Banerjee, PP
Carns, J
Cook, G
Evans, DR
AF Saleh, M. A.
Banerjee, P. P.
Carns, J.
Cook, G.
Evans, D. R.
TI Stimulated photorefractive backscatter leading to six-wave mixing and
phase conjugation in iron-doped lithium niobate
SO APPLIED OPTICS
LA English
DT Article
ID SCATTERING; INSTABILITIES; LINBO3-FE; CRYSTALS; BEAMS
AB The generation of multiple waves during near-oblique incidence of a 532 nm weakly focused beam on photorefractive iron-doped lithium niobate in a typical reflection geometry configuration is studied. It is shown that these waves are produced through two-wave coupling (self-diffraction) and four-wave mixing (parametric diffraction). One of these waves, the stimulated photorefractive backscatter produced from parametric diffraction, contains the self-phase conjugate. The dynamics of six-wave mixing and its dependence on crystal parameters, angle of incidence, and pump power are analyzed. What we believe to be a novel order analysis of the interaction equations provides further insight into experimental observations in the steady state. The quality of the backscatter is evaluated through image restoration, interference experiments, and visibility measurement. Reduction of two-wave coupling may significantly improve the quality of the self-phase conjugate. (c) 2007 Optical Society of America.
C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
UES Inc, Dayton, OH 45432 USA.
Univ Dayton, Dept Elect & Comp Engn, Dayton, OH 45469 USA.
Anteon Corp, Dayton, OH 45431 USA.
Univ Technol Corp, Dayton, OH 45432 USA.
RP Evans, DR (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM dean.evans@wpafb.af.mil
NR 18
TC 2
Z9 2
U1 0
U2 1
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 AUG 20
PY 2007
VL 46
IS 24
BP 6151
EP 6160
DI 10.1364/AO.46.006151
PG 10
WC Optics
SC Optics
GA 210JP
UT WOS:000249452800016
PM 17712380
ER
PT J
AU Soref, RA
Qiang, ZX
Zhou, WD
AF Soref, Richard A.
Qiang, Zexuan
Zhou, Weidong
TI Far infrared photonic crystals operating in the Reststrahl region
SO OPTICS EXPRESS
LA English
DT Article
ID BAND STRUCTURES; SYSTEMS; LATTICE
AB We report here far infrared photonic crystals comprised of a lattice-matched pair of semiconductor materials: GaP and Si, or GaAs and Ge, or AlAs and GaAs. The crystals operate in a wavelength range where the real refractive index of one material undergoes a major dispersion associated with the LO and TO phonon absorption peaks. Using electromagnetic theory, we investigated the photonic-bandgap response for both TE and TM polarizations. Propagation losses for two types of crystals are estimated in this paper. These structures offer promise for the integration of III-V materials ( GaP, GaAs) on group IV (Si, or Ge) for practical, active, far infrared photonic devices, such as light sources, amplifiers, modulators, reconfigurable waveguides and switches.
C1 USAF, Res Lab, Sensors Directorate, AFRL SNHC, Hanscom AFB, MA 01731 USA.
Univ Texas, Dept Elect Engn, NanoFAB Ctr, Arlington, TX 76019 USA.
RP Soref, RA (reprint author), USAF, Res Lab, Sensors Directorate, AFRL SNHC, Hanscom AFB, MA 01731 USA.
EM Richard.Soref@hanscom.af.mil; wzhou@uta.edu
RI Zhou, Weidong/D-1019-2009
NR 20
TC 4
Z9 5
U1 0
U2 1
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD AUG 20
PY 2007
VL 15
IS 17
BP 10637
EP 10648
DI 10.1364/OE.15.010637
PG 12
WC Optics
SC Optics
GA 208RD
UT WOS:000249336000018
PM 19547418
ER
PT J
AU Bai, ZW
Yoonessi, M
Durstock, MF
Dang, TD
AF Bai, Zongwu
Yoonessi, Mitra
Durstock, Michael F.
Dang, Thuy D.
TI Crosslinked polymer composites as proton exchange membrane (PEM)
materials in fuel cell applications
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Bai, Zongwu] Univ Dayton, Res Inst, Dayton, OH 45409 USA.
[Yoonessi, Mitra; Dang, Thuy D.] USAF, Res Lab, MLBP, Mat & Mfg Technol Directorate, Wright Patterson AFB, OH 45433 USA.
[Durstock, Michael F.] USAF, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM zongwu.bai@wpafb.af.mil; michael.durstock@wpafb.af.mil;
thuy.dang@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 272-PMSE
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593905637
ER
PT J
AU Benedict, M
Maguire, JF
AF Benedict, Mark
Maguire, John F.
TI Entropically dominated self-assembly in multicomponent granular systems
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Benedict, Mark; Maguire, John F.] USAF, Polymers Branch MLBP, Res Lab, Dayton, OH 45433 USA.
EM john.maguire@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 1
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 158-PMSE
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593905725
ER
PT J
AU Birnkrant, M
Li, CY
Natarajan, LV
Tondiglia, VP
Lloyd, PF
Sutherland, RL
Bunning, TJ
AF Birnkrant, Michael
Li, Christopher Y.
Natarajan, Lalgudi V.
Tondiglia, Vincent P.
Lloyd, Pamela F.
Sutherland, Richard L.
Bunning, Timothy J.
TI Holographic polymer dispersed semicrystalline polymers and block
copolymers
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Birnkrant, Michael; Li, Christopher Y.] Drexel Univ, AJ Drexel Nanotechnol Inst, Philadelphia, PA 19104 USA.
[Birnkrant, Michael; Li, Christopher Y.] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
[Natarajan, Lalgudi V.; Tondiglia, Vincent P.; Sutherland, Richard L.] Sci Applicat Int Corp, Dayton, OH 45431 USA.
[Lloyd, Pamela F.] Universal Energy Syst Inc, Dayton, OH 45432 USA.
[Bunning, Timothy J.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM subbasic@drexel.edu; cyl24@drexel.edu; Lalgudi.Natarajan@wpafb.af.mil;
vincent.tondiglia@wpafb.af.mil; timothy.bunning@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 218-PMSE
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593905764
ER
PT J
AU Bunning, TJ
White, TJ
Tondiglia, VP
Natarajan, LV
Vaia, R
Serak, SV
Groshik, VA
Tabiryan, NV
AF Bunning, Timothy J.
White, Timothy J.
Tondiglia, Vincent P.
Natarajan, Lalgudi V.
Vaia, Richard
Serak, Svetlana V.
Groshik, Vladimir A.
Tabiryan, Nelson V.
TI POLY 541-Creating work with light: Photoresponsive liquid crystalline
elastomers based on azobenzene
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Bunning, Timothy J.; Vaia, Richard] USAF, Res Lab, Mat & Mfg Directorate, MLBP, Wright Patterson AFB, OH 45433 USA.
[White, Timothy J.] AFRL MLPJ, Wright Patterson AFB, OH 45433 USA.
[Tondiglia, Vincent P.; Natarajan, Lalgudi V.] Sci Applicat Int Corp, Dayton, OH 45431 USA.
[Serak, Svetlana V.; Groshik, Vladimir A.; Tabiryan, Nelson V.] BEAM Co, Winter Pk, FL 32789 USA.
EM timothy.white2@wpafb.af.mil; vincent.tondiglia@wpafb.af.mil;
Lalgudi.Natarajan@wpafb.af.mil; richard.vaia@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 541-POLY
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593908520
ER
PT J
AU Chiu, YH
Levandier, DJ
Dressler, RA
AF Chiu, Yu-Hui
Levandier, Dale J.
Dressler, Rainer A.
TI COLL 77-Atmospheric ionic liquid nano-electrojet sources for chemical
ionization sensing of chem/bio agents
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Chiu, Yu-Hui; Dressler, Rainer A.] USAF, Res Lab, AFRL VSBXT, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA.
[Levandier, Dale J.] Boston Coll, Inst Sci Res, Newton, MA 02159 USA.
EM Yu-Hui.Chiu@Hanscom.af.mill; Dale.Levandier@hanscom.af.mil;
Rainer.Dressler@hanscom.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 77-COLL
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593902148
ER
PT J
AU Diamanti, S
Arifuzzaman, S
Elsen, AM
Wargacki, S
Naik, R
Genzer, J
Vaia, R
AF Diamanti, Steve
Arifuzzaman, Shafi
Elsen, Andrea M.
Wargacki, Stephen
Naik, Rajesh
Genzer, Jan
Vaia, Richard
TI Post-functionalization of polymer brushes for patternable nanoparticle
adsorption
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Diamanti, Steve; Elsen, Andrea M.; Wargacki, Stephen; Naik, Rajesh; Vaia, Richard] USAF, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Arifuzzaman, Shafi; Genzer, Jan] N Carolina State Univ, Dept Chem & Biomol Engn, Raleigh, NC 27695 USA.
EM steve.diamanti@wpafb.af.mil; Jan_Genzer@ncsu.edu;
richard.vaia@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 199-PMSE
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593905487
ER
PT J
AU Diamanti, S
Arifuzzaman, S
Elsen, AM
Wargacki, S
Naik, R
Genzer, J
Vaia, R
AF Diamanti, Steve
Arifuzzaman, Shafi
Elsen, Andrea M.
Wargacki, Stephen
Naik, Rajesh
Genzer, Jan
Vaia, Richard
TI AEI 122-Post-functionalization of polymer brushes for patternable
nanoparticle adsorption
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Vaia, Richard] USAF, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Arifuzzaman, Shafi; Genzer, Jan] N Carolina State Univ, Dept Chem & Biomol Engn, Raleigh, NC 27695 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM steve.diamanti@wpafb.af.mil; Jan_Genzer@ncsu.edu;
richard.vaia@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 122-AEI
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593900029
ER
PT J
AU Drummy, LF
Naik, RR
Farmer, BL
AF Drummy, Lawrence F.
Naik, Rajesh R.
Farmer, B. L.
TI Low voltage TEM and Scherrer analysis of Bombyx mori silk fiber
crystallites
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Drummy, Lawrence F.] Universal Energy Syst Inc, Dayton, OH 45432 USA.
[Naik, Rajesh R.; Farmer, B. L.] USAF, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM lawrence.drummy@wpafb.af.mil; rajesh.naik@wpafb.af.mil;
barry.farmer@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 3
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 103-PMSE
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593905676
ER
PT J
AU Dudis, DS
Yeates, AT
AF Dudis, Douglas S.
Yeates, Alan T.
TI PHYS 33-Solvent fields in electron transfer reactions
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Dudis, Douglas S.] USAF, Res Lab, Mat & Mfg Directorate, MLBP, Wright Patterson AFB, OH 45433 USA.
[Yeates, Alan T.] USAF, Res Lab, MLBP, Wright Res Lab, Wright Patterson AFB, OH 45433 USA.
EM douglas.dudis@afrl.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 33-PHYS
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593907585
ER
PT J
AU Dudis, DS
Verrilli, T
Houseknecht, J
Benin, V
Yeates, AT
AF Dudis, Douglas S.
Verrilli, Timothy
Houseknecht, Justin
Benin, Vladimir
Yeates, Alan T.
TI Hydrogen abstraction-induced ring opening in thiazoles
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Dudis, Douglas S.] USAF, Mat & Mfg Directorate, Res Lab, AFRK MLBP, Wright Patterson AFB, OH 45433 USA.
[Verrilli, Timothy; Houseknecht, Justin] Wittenberg Univ, Dept Chem, Springfield, OH 45501 USA.
[Benin, Vladimir] Univ Dayton, Dept Chem, Dayton, OH 45469 USA.
[Yeates, Alan T.] Wright Res Lab, AFRL MLBP, Wright Patterson AFB, OH 45433 USA.
EM douglas.dudis@afrl.af.mil; s08.tverrlli@wittenberg.edu;
jhouseknecht@wittenberg.edu
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 235-CHED
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593904385
ER
PT J
AU Edwards, T
Harrison, WE
AF Edwards, Tim
Harrison, William E., III
TI DoD Assured Fuels Initiative update
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Edwards, Tim] USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
[Harrison, William E., III] USAF, Res Lab, Fuels Branch, Turbine Engine Div,Prop Directorate, Dayton, OH 45433 USA.
EM james.edwards@wpafb.af.mil; william.harrison@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 108-FUEL
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593903749
ER
PT J
AU Eo, SM
Oh, SJ
Tan, LS
Baek, JB
AF Eo, Soo-Mi
Oh, Se-Jin
Tan, Loon-Seng
Baek, Jong-Beom
TI POLY 209-In situ polymerization of polybenzoxazole in the presence of
carbon nanotubes in polyphosphoric acid
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Eo, Soo-Mi; Oh, Se-Jin; Baek, Jong-Beom] Chungbuk Natl Univ, Sch Chem Engn, Cheongju 361763, Chungbuk, South Korea.
[Tan, Loon-Seng] USAF, Polymer Branch, AFRL MLBP, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM smeo@chungbuk.ac.kr; sejin@chungbuk.ac.kr; Loon-Seng.Tan@afrl.af.mil;
jbbaek@chungbuk.ac.kr
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 209-POLY
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593908379
ER
PT J
AU Graham, JL
Minus, D
AF Graham, John L.
Minus, Donald
TI FUEL 109-An investigation of aviation components material compatibility
with blends of a Fischer-Tropsch-derived jet fuel with petroleum-derived
jet fuels
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Graham, John L.] Univ Dayton, Dayton, OH 45469 USA.
[Minus, Donald] USAF, Res Lab, AFRL PRTG, Wright Patterson AFB, OH 45433 USA.
EM grahamjl@udri.udayton.edu; Donald.Minus@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 109-FUEL
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593903684
ER
PT J
AU Hagen, J
Grote, JG
Clarson, SJ
AF Hagen, Josh
Grote, James G.
Clarson, Stephen J.
TI POLY 560-Processing and modification of marine derived DNA for use in
optoelectronic device applications
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Hagen, Josh] Givaudan Flavors Corp, Cincinnati, OH 45216 USA.
[Grote, James G.] USAF, Res Lab, Mat & Mfg Directorate, AFRL MLPS, Wright Patterson AFB, OH 45433 USA.
[Clarson, Stephen J.] Univ Cincinnati, Dept Chem & Mat Engn, Engn Res Ctr 601B, Coll Engn, Cincinnati, OH 45221 USA.
EM james.grote@wpafb.af.mil; Stephen.Clarson@UC.Edu
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 560-POLY
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593908004
ER
PT J
AU Han, SW
Oh, SJ
Tan, LS
Baek, JB
AF Han, Sang-Wook
Oh, Se-Jin
Tan, Loon-Seng
Baek, Jong-Beom
TI POLY 210-One-pot purification of single-walled carbon nanotube in a mild
polyphosphoric acid
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Han, Sang-Wook; Oh, Se-Jin; Baek, Jong-Beom] Chungbuk Natl Univ, Sch Chem Engn, Cheongju 361763, Chungbuk, South Korea.
[Tan, Loon-Seng] USAF, Polymer Branch, AFRL MLBP, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM tariwooks@hanmail.net; sejin@chungbuk.ac.kr; Loon-Seng.Tan@afrl.af.mil;
jbbaek@chungbuk.ac.kr
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 210-POLY
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593908385
ER
PT J
AU Jara, A
Fritchman, J
Dudis, DS
Yeates, AT
AF Jara, Adam
Fritchman, Joseph
Dudis, Douglas S.
Yeates, Alan T.
TI PHYS 81-Modeling sulfur electrochemical reactions for advanced batteries
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Jara, Adam] Wittenberg Univ, Dept Chem, Springfield, OH 45501 USA.
[Fritchman, Joseph] Wittenberg Univ, Dept Phys, Springfield, OH 45501 USA.
[Dudis, Douglas S.] USAF, Res Lab, Mat & Mfg Directorate, MLBP, Wright Patterson AFB, OH 45433 USA.
[Yeates, Alan T.] USAF, Res Lab, MLBP, Wright Res Lab, Wright Patterson AFB, OH 45433 USA.
EM s08.ajara@wittenberg.edu; douglas.dudis@afrl.af.mil
NR 0
TC 0
Z9 0
U1 1
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 81-PHYS
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593907603
ER
PT J
AU Jeong, JY
Lee, HJ
Tan, LS
Baek, JB
AF Jeong, Jae-Yong
Lee, Hwa-Jeong
Tan, Loon-Seng
Baek, Jong-Beom
TI POLY 208-In situ synthesis of Nylon 610 containing functionalized
multiwalled carbon nanotubes via interfacial polymerization
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Jeong, Jae-Yong; Lee, Hwa-Jeong; Baek, Jong-Beom] Chungbuk Natl Univ, Sch Chem Engn, Cheongju 361763, Chungbuk, South Korea.
[Tan, Loon-Seng] USAF, Polymer Branch, AFRL MLBP, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM jyjeong@chungbuk.ac.kr; Loon-Seng.Tan@afrl.af.mil; jbbaek@chungbuk.ac.kr
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 208-POLY
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593908382
ER
PT J
AU Kulkarni, RR
Li, QA
Jeong, KU
Durstock, MF
Farmer, BL
Harris, FW
Cheng, SZD
AF Kulkarni, Rahul R.
Li, Quan
Jeong, Kwang Un
Durstock, Michael F.
Farmer, Barry L.
Harris, Frank W.
Cheng, Stephen Z. D.
TI Structure and morphology of porphyrin based discotic liquid crystals
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Kulkarni, Rahul R.; Jeong, Kwang Un; Harris, Frank W.; Cheng, Stephen Z. D.] Univ Akron, Maurice Morton Inst, Akron, OH 44325 USA.
[Kulkarni, Rahul R.; Jeong, Kwang Un; Harris, Frank W.; Cheng, Stephen Z. D.] Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA.
[Li, Quan] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA.
[Durstock, Michael F.; Farmer, Barry L.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM rrk@uakron.edu; quan@lci.kent.edu; scheng@uakron.edu;
michael.durstock@wpafb.af.mil; barry.farmer@wpafb.af.mil;
fharris@uakron.edu
NR 0
TC 0
Z9 0
U1 0
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 236-PMSE
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593905760
ER
PT J
AU Lim, DH
Lee, HJ
Tan, LS
Baek, JB
AF Lim, Dae-Hyun
Lee, Hwa-Jeong
Tan, Loon-Seng
Baek, Jong-Beom
TI POLY 207-Chemical modification of C60 by destructive electrophilic
substitution reaction in polyphosphoric acid/phosphorus pentoxide
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Lim, Dae-Hyun; Lee, Hwa-Jeong; Baek, Jong-Beom] Chungbuk Natl Univ, Sch Chem Engn, Cheongju 361763, Chungbuk, South Korea.
[Tan, Loon-Seng] USAF, Polymer Branch, AFRL MLBP, Res Lab, Wright Patterson AFB, OH 45433 USA.
EM dhlim@chungbuk.ac.kr; Loon-Seng.Tan@afrl.af.mil; jbbaek@chungbuk.ac.kr
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 207-POLY
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593908391
ER
PT J
AU MacCuspie, RI
Elsen, AM
Patton, S
Jacobs, JD
Diamanti, S
Arlen, M
Voevodin, AA
Vaia, R
AF MacCuspie, Robert I.
Elsen, Andrea M.
Patton, Steve
Jacobs, J. David
Diamanti, Steve
Arlen, Michael
Voevodin, Andrey A.
Vaia, Richard
TI Nanoparticle liquids for reconfigurable electronic materials
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [MacCuspie, Robert I.; Elsen, Andrea M.; Patton, Steve; Jacobs, J. David; Diamanti, Steve; Arlen, Michael; Voevodin, Andrey A.; Vaia, Richard] USAF, Res Lab, AFRL MLBP, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM robert.maccuspie@wpafb.af.mil; steve.diamanti@wpafb.af.mil;
richard.vaia@wpafb.af.mil
RI Voevodin, Andrey/I-6684-2013
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 198-PMSE
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593905437
ER
PT J
AU Minch, BA
Smith, AP
Taylor, BE
Deneault, JR
Durstock, MF
AF Minch, Britt A.
Smith, Adam P.
Taylor, Barney E.
Deneault, James R.
Durstock, Michael F.
TI ORGN 405-Synthesis of tetrasubsitituted phthalocyanines and their
application in PV devices
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Minch, Britt A.] USAF, Res Labs, Mat & Mfg Directorate, NRC, Wright Patterson AFB, OH 45433 USA.
[Smith, Adam P.] USAF, Res Lab, Mat & Mfg Directorate, UES INC, Wright Patterson AFB, OH 45433 USA.
[Taylor, Barney E.; Deneault, James R.] UTC, AFRL Mat & Mfg Directorate, Wright Patterson AFB, OH 45431 USA.
EM britt.minch@wpafb.af.mil; adam.smith@wpafb.af.mil;
barney.taylor@afrl.af.mil; michael.durstock@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 405-ORGN
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593909856
ER
PT J
AU Minch, BA
Smith, AP
Deneault, JR
Taylor, BE
Durstock, MF
AF Minch, Britt A.
Smith, Adam P.
Deneault, James R.
Taylor, Barney E.
Durstock, Michael F.
TI AEI 99-Synthesis of tetrasubsitituted phthalocyanines and their
application in pv devices
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Minch, Britt A.] USAF, Mat & Mfg Directorate, Res Labs, NRC, Wright Patterson AFB, OH 45433 USA.
[Smith, Adam P.] USAF, Mat & Mfg Directorate, Res Lab, UES INC, Wright Patterson AFB, OH 45433 USA.
[Deneault, James R.; Taylor, Barney E.] UTC, AFRL Mat & Mfg Directorate, Wright Patterson AFB, OH 45431 USA.
[Durstock, Michael F.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM britt.minch@wpafb.af.mil; adam.smith@wpafb.af.mil;
barney.taylor@afrl.af.mil; michael.durstock@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 99-AEI
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593900067
ER
PT J
AU Olejniczak, A
Katrusiak, A
Vij, A
AF Olejniczak, Anna
Katrusiak, Andrzej
Vij, Ashwani
TI FLUO 5-Haloethanes: Pressure freezing, structural studies and
development of "Legoland" architecture
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Olejniczak, Anna; Katrusiak, Andrzej] Adam Mickiewicz Univ Poznan, Dept Crystallog, PL-60780 Poznan, Poland.
[Vij, Ashwani] USAF, Res Lab, AFRL PRSP, Edwards AFB, CA 93524 USA.
EM katran@amu.edu.pl; ashwani.vij@edwards.af.mil
RI Vij, Ashwani/A-2836-2012
OI Vij, Ashwani/0000-0003-1144-4080
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 5-FLUO
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593901808
ER
PT J
AU Pate, BD
Rogers, JE
Taylor, BE
Minch, BA
Deneault, JR
Smith, AP
Durstock, MF
AF Pate, Brian D.
Rogers, Joy E.
Taylor, Barney E.
Minch, Britt A.
Deneault, James R.
Smith, Adam P.
Durstock, Michael F.
TI AEI 69-Fluid-processed tetraazaporphyrin-based photovoltaics
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Pate, Brian D.; Taylor, Barney E.; Deneault, James R.; Smith, Adam P.] Univ Technology Corp, Mat & Mfg Directorate, AFRL, MLBP, Wright Patterson AFB, OH 45433 USA.
EM Brian.Pate@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 69-AEI
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593900102
ER
PT J
AU Schwertner, HA
Valtier, S
Edwards, ML
Bin Kong, S
AF Schwertner, Harvey A.
Valtier, Sandra
Edwards, Marilee L.
Bin Kong, Suk
TI AGFD 124-Analysis of 6-gingerol, 6-shogaol, and 6-gingerdiol in ginger
rhizome powder and in physiological fluids by HPLC, GC/MS, and LC/MS
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Schwertner, Harvey A.; Valtier, Sandra; Edwards, Marilee L.] Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
[Bin Kong, Suk] Univ Incarnate Word, Dept Chem, San Antonio, TX 78209 USA.
EM harvey.schwertner@lackland.af.mil; sandra.valtier@lackland.af.mil;
kong@uiwtx.edu
NR 0
TC 0
Z9 0
U1 1
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 124-AGFD
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593900257
ER
PT J
AU Slocik, JM
Gupta, MK
Drummy, LF
Tomczak, MM
Naik, RR
AF Slocik, Joseph M.
Gupta, Maneesh K.
Drummy, Lawrence F.
Tomczak, Melanie M.
Naik, Rajesh R.
TI Biological routes to inorgamic material synthesis
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Slocik, Joseph M.; Gupta, Maneesh K.; Drummy, Lawrence F.; Tomczak, Melanie M.; Naik, Rajesh R.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM Joseph.Slocik@wpafb.af.mil; Melanie.Tomczak@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 181-PMSE
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593905656
ER
PT J
AU Smith, AP
Taylor, BE
Deneault, JR
Durstock, MF
AF Smith, Adam P.
Taylor, Barney E.
Deneault, James R.
Durstock, Michael F.
TI AEI 102-Synthesis of tetrasubsitituted phthalocyanines and their
application in pv devices
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Smith, Adam P.] UES INC, Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Taylor, Barney E.; Deneault, James R.] UTC, AFRL, Mat & Mfg Directorate, Wright Patterson AFB, OH 45431 USA.
[Durstock, Michael F.] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM adam.smith@wpafb.af.mil; barney.taylor@afrl.af.mil;
michael.durstock@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 102-AEI
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593900006
ER
PT J
AU Tuteja, A
Choi, W
Mabry, JM
McKinley, GH
Cohen, RE
AF Tuteja, Anish
Choi, Wonjae
Mabry, Joseph M.
McKinley, Gareth H.
Cohen, Robert E.
TI COLL 19-Designing superoleophobic surfaces with fluoroPOSS
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Tuteja, Anish; Cohen, Robert E.] MIT, Dept Chem Engn, Cambridge, MA 02139 USA.
[McKinley, Gareth H.] MIT, Dept Mech Engn, Hatsopoulos Microfluids Lab, Cambridge, MA 02139 USA.
[Mabry, Joseph M.] USAF, Res Lab, AFRL PRSM, ERC Inc, Edwards AFB, CA 93524 USA.
EM atuteja@mit.edu; wonjaec@mit.edu; joseph.mabry@edwards.af.mil;
gareth@mit.edu; recohen@mit.edu
RI McKinley, Gareth/G-4872-2011
OI McKinley, Gareth/0000-0001-8323-2779
NR 0
TC 0
Z9 0
U1 2
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 19-COLL
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593902245
ER
PT J
AU Venkatasubramanian, N
Stricker, JT
Durstock, MF
Dang, TD
Wiacek, KJ
Fries-Carr, S
AF Venkatasubramanian, N.
Stricker, Jeffery T.
Durstock, Michael F.
Dang, Thuy D.
Wiacek, Kevin J.
Fries-Carr, Sandra
TI POLY 137-Self-healing phenomenon during the electrical breakdown of a
spin-coated polyester dielectric
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Venkatasubramanian, N.] Univ Dayton, Res Inst, Dayton, OH 45469 USA.
[Stricker, Jeffery T.; Dang, Thuy D.] USAF, Res Lab, Mat & Mfg Technol Directorate, AFRL MLBP, Wright Patterson AFB, OH 45433 USA.
[Durstock, Michael F.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Wiacek, Kevin J.; Fries-Carr, Sandra] Prop Directorate, Elect Technol Branch, AFRL PRPE, Wright Patterson AFB, OH 45433 USA.
EM narayanan.venkat@wpafb.af.mil; jeffery.stricker@tinker.af.mil;
michael.durstock@wpafb.af.mil; thuy.dang@wpafb.af.mil;
kevin.wiacek@wpafb.af.mil; sandra.fries-carr@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 1
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 137-POLY
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593908090
ER
PT J
AU White, TJ
Natarajan, LV
Tondiglia, VP
Bunning, TJ
Guymon, CA
AF White, Timothy J.
Natarajan, Lalgudi V.
Tondiglia, Vincent P.
Bunning, Timothy J.
Guymon, C. Allan
TI POLY 543-Polymerization kinetics and phase separation effects in
holographic polymer dispersed liquid crystals
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [White, Timothy J.] AFRL, MLPJ, Wright Patterson AFB, OH 45433 USA.
[Natarajan, Lalgudi V.; Tondiglia, Vincent P.] Sci Applicat Int Corp, Dayton, OH 45431 USA.
[Bunning, Timothy J.] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
[Guymon, C. Allan] Univ Iowa, Dept Chem & Biochem Engn, Seamans Ctr 4125, Iowa City, IA 52242 USA.
EM timothy.white2@wpafb.af.mil; Lalgudi.Natarajan@wpafb.af.mil;
vincent.tondiglia@wpafb.af.mil; timothy.bunning@wpafb.af.mil;
cguymon@engineering.uiowa.edu
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 543-POLY
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593908674
ER
PT J
AU Wofford, JM
Natarajan, LV
Sutherland, RL
Tondiglia, V
Lloyd, PF
Bunning, TJ
AF Wofford, Jeremy M.
Natarajan, Lalgudi V.
Sutherland, Richard L.
Tondiglia, Vincent
Lloyd, Pamela F.
Bunning, Timothy J.
TI POLY 467-Morphological sudies of Bragg reflection gratings written in
holographic polymer dispersed liquid crystals by thiol-ene
photopolymerization
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Bunning, Timothy J.] USAF, Res Lab, Mat & Mfg Directorate, MLPJ, Wright Patterson AFB, OH 45433 USA.
[Natarajan, Lalgudi V.; Sutherland, Richard L.; Tondiglia, Vincent] Sci Applicat Int Corp, Dayton, OH 45431 USA.
[Lloyd, Pamela F.] Universal Energy Syst Inc, Dayton, OH 45432 USA.
EM Lalgudi.Natarajan@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 467-POLY
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593908538
ER
PT J
AU Yeates, AT
Dudis, DS
AF Yeates, A. T.
Dudis, Douglas S.
TI PHYS 388-Design and modeling of n-channel organic semiconductors based
on thiazolothiazole and its interface with metals
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 [Yeates, A. T.; Dudis, Douglas S.] USAF, Res Lab, Mat & Mfg Directorate, MLBP,Polymer Branch, Wright Patterson AFB, OH 45433 USA.
EM alan.yeates@wpafb.af.mil; douglas.dudis@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 19
PY 2007
VL 234
MA 388-PHYS
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA V12IW
UT WOS:000207593907565
ER
PT J
AU Bebarta, VS
Phillips, S
Eberhardt, A
Calihan, KJ
Waksman, JC
Heard, K
AF Bebarta, Vikhyat S.
Phillips, Scott
Eberhardt, Aaron
Calihan, K. J.
Waksman, Javier C.
Heard, Kennon
TI Incidence of Brugada electrocardiographic pattern and outcomes of these
patients after intentional tricyclic antidepressant ingestion
SO AMERICAN JOURNAL OF CARDIOLOGY
LA English
DT Article
ID ST-SEGMENT-ELEVATION; THIORIDAZINE OVERDOSE; CARDIOTOXICITY;
INDIVIDUALS; DEATH
AB Brugada syndrome is a genetic dysfunction of the myocardial sodium channel that leads to ventricular dysrhythmias. The electrocardiographic (ECG) pattern of Brugada syndrome is occasionally seen after tricyclic antidepressant (TCA) ingestion; however, the outcome and complication risk for these patients is not clear. The objective of our study was to describe the incidence of Brugada ECG pattern (BEP) and serious complications of these patients in a large case series of intentional TCA ingestions. We also compared the proportion of complications of patients with BEP versus those without BEP. We evaluated 402 TCA ingestions, of which 9 (2.3%) were associated with the development of BEP. We compared the adverse outcomes of all TCA ingestions versus TCA ingestions with BEP. A increase in the adverse outcomes in the BEP group was found: seizures (relative risk [RR] 4; 95% confidence interval [CI] 1.5 to 10.8), widened QRS (RR 4.8; 95% CI 1.8 to 12.9), and hypotension (RR 30; 95% CI 2.1 to 7.4). To reduce confounding ingestants, we also compared all patients with an isolated TCA ingestion versus those with BEP. A significant increase in adverse outcomes was again found with the BEP group: seizures (RR 3; 95% CI 1.1 to 8.6), widened QRS (RR 4.8; 95% CI 1.5 to 15.1), and hypotension (RR 3.4; 95% CI 1.9 to 22.3). No deaths or dysrhythmias were found in the BEP group. In conclusion, BEP after TCA ingestion is rare, and death or dysrhythmias did not occur. However, patients with BEP are likely at increased risk for TCA-induced complications. (c) 2007 Elsevier Inc. All rights reserved.
C1 Wilford Hall USAF Med Ctr, Div Med Toxicol, Dept Emergency Med, San Antonio, TX 78236 USA.
Univ Colorado, Hlth Sci Ctr, Rocky Mt Poison & Drug Ctr, Denver, CO USA.
Denver Hlth Med Ctr, Dept Emergency Med, Denver, CO USA.
Aurora Womens Care Clin, Aurora, CO USA.
RP Bebarta, VS (reprint author), Wilford Hall USAF Med Ctr, Div Med Toxicol, Dept Emergency Med, San Antonio, TX 78236 USA.
EM vikbebarta@yahoo.com
NR 20
TC 17
Z9 18
U1 2
U2 2
PU EXCERPTA MEDICA INC-ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010 USA
SN 0002-9149
J9 AM J CARDIOL
JI Am. J. Cardiol.
PD AUG 15
PY 2007
VL 100
IS 4
BP 656
EP 660
DI 10.1016/j.amjcard.2007.03.077
PG 5
WC Cardiac & Cardiovascular Systems
SC Cardiovascular System & Cardiology
GA 202AF
UT WOS:000248873200019
PM 17697824
ER
PT J
AU Kosch, MJ
Pedersen, T
Mishin, E
Starks, M
Gerken-Kendall, E
Sentman, D
Oyama, S
Watkins, B
AF Kosch, M. J.
Pedersen, T.
Mishin, E.
Starks, M.
Gerken-Kendall, E.
Sentman, D.
Oyama, S.
Watkins, B.
TI Temporal evolution of pump beam self-focusing at the High-Frequency
Active Auroral Research Program
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID HF-INDUCED AIRGLOW; ELECTRON-TEMPERATURE ENHANCEMENTS; POWER
RADIO-WAVES; IONOSPHERIC MODIFICATION; OPTICAL-EMISSIONS; MAGNETIC
ZENITH; HEATER; REGION; INSTABILITY; LATITUDES
AB [1] On 4 February 2005 the High-Frequency Active Auroral Research Program ( HAARP) facility was operated at 2.85 MHz to produce artificial optical emissions in the ionosphere while passing through the second electron gyroharmonic. All-sky optical recordings were performed with 15 s integration, alternating between 557.7 and 630 nm. We report the first optical observations showing the temporal evolution of large-scale pump wave self-focusing in the magnetic zenith, observed in the 557.7 nm images. These clearly show that the maximum intensity was not reached after 15 s of pumping, which is unexpected since the emission delay time is < 1 s, and that the optical signature had intensified in a much smaller region within the beam after 45 s of pumping. In addition, adjacent regions within the beam lost intensity. Radar measurements indicate a plasma depletion of similar to 1% near the HF reflection altitude. Ray tracing of the pump wave through the plasma depletion region, which forms a concave reflecting radio wave mirror, reproduces the optical spatial morphology. A radio wave flux density gain of up to similar to 30 dB may occur. In addition, the ray trace is consistent with the observed artificial optical emissions for critical plasma frequencies down to similar to 0.5 MHz below the pump frequency.
C1 Hanscom AFB, AF Res Lab, Space Vehicles Directorate, Hanscom AFB, MA USA.
Univ Lancaster, Dept Commun Syst, Lancaster, England.
Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA.
SRI Int, Menlo Pk, CA 94025 USA.
Univ Alaska, Inst Geophys, Fairbanks, AK USA.
Nagoya Univ, Solar Terrestrial Environm Lab, Nagoya, Aichi, Japan.
RP Kosch, MJ (reprint author), Hanscom AFB, AF Res Lab, Space Vehicles Directorate, Hanscom AFB, MA USA.
EM m.kosch@lancaster.ac.uk
OI Kosch, Michael Jurgen/0000-0003-2846-3915
NR 48
TC 21
Z9 21
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD AUG 15
PY 2007
VL 112
IS A8
AR A08304
DI 10.1029/2007JA012264
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 202KO
UT WOS:000248900700003
ER
PT J
AU Mosbacker, HL
Zgrabik, C
Hetzer, MJ
Swain, A
Look, DC
Cantwell, G
Zhang, J
Song, JJ
Brillson, LJ
AF Mosbacker, H. L.
Zgrabik, C.
Hetzer, M. J.
Swain, A.
Look, D. C.
Cantwell, G.
Zhang, J.
Song, J. J.
Brillson, L. J.
TI Thermally driven defect formation and blocking layers at metal-ZnO
interfaces
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID THIN-FILMS; CONTACTS; DEVICES
AB The authors used depth-resolved cathodoluminescence spectroscopy and current-voltage measurements to probe the temperature-dependent formation of native point defects and reaction layers at metal-ZnO interfaces and their effect on transport properties. These results identify characteristic defect emissions corresponding to metal-Zn alloy versus oxide formation. Au alloys with Zn above its eutectic temperature, while Ta forms oxide blocking layers that reduce current by orders of magnitude at intermediate temperatures. Defects generated at higher temperatures and/or with higher initial defect densities for all interfaces produce Ohmic contacts. These reactions and defect formation with annealing reveal a thermodynamic control of blocking versus Ohmic contacts. (C) 2007 American Institute of Physics.
C1 Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
Columbus Sch Girls, Bexley, OH 43209 USA.
Wright State Univ, Semicond Res Ctr, Dayton, OH 45433 USA.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA.
Univ Calif San Diego, Dept Elect & Comp Engn, San Diego, CA 92103 USA.
RP Mosbacker, HL (reprint author), Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
EM brillson.1@osu.edu
OI Swain, Akshya/0000-0002-5991-9033
NR 15
TC 24
Z9 24
U1 0
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 AUG 13
PY 2007
VL 91
IS 7
AR 072102
DI 10.1063/1.2772664
PG 3
WC Physics, Applied
SC Physics
GA 201XT
UT WOS:000248866600051
ER
PT J
AU Wang, KY
Huang, WP
Cheng, HH
Sun, G
Soref, RA
Nicholas, RJ
Suen, YW
AF Wang, K. Y.
Huang, W. P.
Cheng, H. H.
Sun, G.
Soref, R. A.
Nicholas, R. J.
Suen, Y. W.
TI Observation of type-I and type-II excitons in strained Si/SiGe
quantum-well structures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID BAND ALIGNMENT; PHOTOLUMINESCENCE; HETEROSTRUCTURES; SILICON; GAP;
ALLOYS
AB The authors report photoluminescence (PL) measurement on a series of Si/SiGe quantum-well structures that had different internal strain distributions. When each sample was placed in a high magnetic field, the field-dependent energy shift of the relevant PL peaks revealed either type-I or type-II exciton formation depending on the strain distribution. This observation is in agreement with theoretical modeling. The present investigation shows that type-I band alignment-desired for electroluminescent devices-can be achieved by strain engineering. (C) 2007 American Institute of Physics.
C1 Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 106, Taiwan.
Natl Taiwan Univ, Grad Inst Elect Engn, Taipei 106, Taiwan.
Univ Massachusetts, Dept Phys, Boston, MA 02125 USA.
USAF, Res Lab, Sensors Directorate, Hanscom AFB, MA 01731 USA.
Univ Oxford, Dept Phys, Oxford OX1 3PU, England.
Natl Chung Hsing Univ, Dept Phys, Taichung 402, Taiwan.
Natl Nano Device Labs, Hsinchu 30078, Taiwan.
RP Cheng, HH (reprint author), Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 106, Taiwan.
EM hhcheng@ntu.edu.tw
RI 李, 輝/B-1359-2016;
OI Nicholas, Robin/0000-0001-9025-0465
NR 14
TC 6
Z9 6
U1 0
U2 5
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 AUG 13
PY 2007
VL 91
IS 7
AR 072108
DI 10.1063/1.2771094
PG 3
WC Physics, Applied
SC Physics
GA 201XT
UT WOS:000248866600057
ER
PT J
AU Miller, NJ
Dierking, MP
Duncan, BD
AF Miller, Nicholas J.
Dierking, Matthew P.
Duncan, Bradley D.
TI Optical sparse aperture imaging
SO APPLIED OPTICS
LA English
DT Article
ID TELESCOPES; CRITERION; SYSTEMS; ARRAYS
AB The resolution of a conventional diffraction-limited imaging system is proportional to its pupil diameter. A primary goal of sparse aperture imaging is to enhance resolution while minimizing the total light collection area; the latter being desirable, in part, because of the cost of large, monolithic apertures. Performance metrics are defined and used to evaluate several sparse aperture arrays constructed from multiple, identical, circular subapertures. Subaperture piston and/or tilt effects on image quality are also considered. We selected arrays with compact nonredundant autocorrelations first described by Golay. We vary both the number of subapertures and their relative spacings to arrive at an optimized array. We report the results of an experiment in which we synthesized an image from multiple subaperture pupil fields by masking a large lens with a Golay array. For this experiment we imaged a slant edge feature of an ISO12233 resolution target in order to measure the modulation transfer function. We note the contrast reduction inherent in images formed through sparse aperture arrays and demonstrate the use of a Wiener-Helstrom filter to restore contrast in our experimental images. Finally, we describe a method to synthesize images from multiple subaperture focal plane intensity images using a phase retrieval algorithm to obtain estimates of subaperture pupil fields. Experimental results from synthesizing an image of a point object from multiple subaperture images are presented, and weaknesses of the phase retrieval method for this application are discussed. (c) 2007 Optical Society of America.
C1 Univ Dayton, Elect Opt Program, Dayton, OH 45469 USA.
USAF, AFRl, SNJM, Wright Patterson AFB, OH 45433 USA.
RP Miller, NJ (reprint author), Univ Dayton, Elect Opt Program, 300 Coll Pk, Dayton, OH 45469 USA.
EM nicholas.miller@wpafb.af.mil
NR 22
TC 40
Z9 44
U1 1
U2 7
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 AUG 10
PY 2007
VL 46
IS 23
BP 5933
EP 5943
DI 10.1364/AO.46.005933
PG 11
WC Optics
SC Optics
GA 208JJ
UT WOS:000249315300050
PM 17694146
ER
PT J
AU Phelps, C
Druffner, CJ
Perram, GP
Biggers, RR
AF Phelps, Charles
Druffner, Carl J.
Perram, Glen P.
Biggers, Rand R.
TI Shock front dynamics in the pulsed laser deposition of YBa2Cu3O7-x
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID PLUME PROPAGATION; THIN-FILMS; ABLATION; WAVE; PHYSICS; GAS
AB The pulsed laser deposition of YBa2Cu3O7-x targets by excimer laser at fluences of 4-10 J cm(-2) in low pressure oxygen backgrounds yields emissive plumes with kinetic energies of 50-200 eV, driving the formation of a shock front with Mach numbers of M = 10-50. The propagation of the shock front is independent of atomic species and adequately characterized by the Sedov-Taylor shock model if the dimensionality of the plume is allowed to deviate from ideal spherical expansion. The ideal efficiency of energy conversion from laser pulse to shock expansion is nearly unity at 1 Torr, but decreases rapidly at lower pressures, where the plume expands beyond the laser footprint during ablation. The low oxygen background pressures, 100-1000mTorr, typically employed for the production of superconducting films is sufficient for the generation of a strong shock front with shock thickness of 5mm to less than 0.4 mm, but too low to develop three-dimensional flow. Indeed, dimensionality of the expansion ranges from n = 0.8 to 2.4 over the background oxygen pressure range of 25-1000mTorr. Shock strength is proportional to the Mach number and inversely dependent on pressure, indicating a thickness limited to approximately the collision mean free path.
C1 USAF, Inst Technol, Dept Engn Phys, Wright Patterson AFB, OH 45433 USA.
AF Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Perram, GP (reprint author), USAF, Inst Technol, Dept Engn Phys, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM glen.perram@afit.edu
OI Perram, Glen/0000-0002-4417-3929
NR 21
TC 11
Z9 12
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD AUG 7
PY 2007
VL 40
IS 15
BP 4447
EP 4453
DI 10.1088/0022-3727/40/15/010
PG 7
WC Physics, Applied
SC Physics
GA 193CG
UT WOS:000248250600011
ER
PT J
AU Rogers, JE
Slagle, JE
Krein, DM
Burke, AR
Hall, BC
Fratini, A
McLean, DG
Fleitz, PA
Cooper, TM
Drobizhev, M
Makarov, NS
Rebane, A
Kim, KY
Farley, R
Schanze, KS
AF Rogers, Joy E.
Slagle, Jonathan E.
Krein, Douglas M.
Burke, Aaron R.
Hall, Benjamin C.
Fratini, Albert
McLean, Daniel G.
Fleitz, Paul A.
Cooper, Thomas M.
Drobizhev, Mikhail
Makarov, Nikolay S.
Rebane, Aleksander
Kim, Kye-Young
Farley, Richard
Schanze, Kirk S.
TI Platinum acetylide two-photon chromophores
SO INORGANIC CHEMISTRY
LA English
DT Article
ID EXCITED-STATE ABSORPTION; POWER-LIMITING PROPERTIES; PT-ETHYNYL
COMPOUND; ONE-PHOTON; COOPERATIVE ENHANCEMENT; PROPERTY RELATIONSHIPS;
FLUORENE DERIVATIVES; NONLINEAR ABSORPTION; ABSORBING FLUORENE;
ORGANIC-MOLECULES
AB To explore the photophysics of platinum acetylide chromophores with strong two-photon absorption cross-sections, we have investigated the synthesis and spectroscopic characterization of a series of platinum acetylide complexes that feature highly pi-conjugated ligands substituted with pi-donor or -acceptor moieties. The molecules (numbered 1-4) considered in the present work are analogs of bis(phenylethynyl)bis(tributylphosphine)platinum(II) complexes. Molecule 1 carries two alkynyl-benzothiazolylfluorene ligands, and molecule 2 has two alkynyl-diphenylaminofluorene ligands bound to the central platinum atom. Compounds 3 and 4 possess two dihexylaminophenyl substituents at their ends and differ by the number of platinum atoms in the oligomer "core" (one vs two in 3 and 4, respectively). The ligands have strong effective two-photon absorption cross-sections, while the heavy metal platinum centers give rise to efficient intersystem crossing to long-lived triplet states. Ultrafast transient absorption and emission spectra demonstrate that one-photon excitation of the chromophores produces an S(1) state delocalized across the two conjugated ligands, with weak (excitonic) coupling through the platinum centers. Intersystem crossing occurs rapidly (k(isc) approximate to 10(11) s(-1)) to produce the T(1) state, which is possibly localized on a single conjugated fluorenyl ligand. The triplet state is strongly absorbing (epsilon(TT) > 5 x 10(4) M(-1) cm(-1)), and it is very long-lived (tau > 100 mu s). Femtosecond pulses were used to characterize the two-photon absorption properties of the complexes, and all of the chromophores are relatively efficient two-photon absorbers in the visible and near-infrared region of the spectrum (600-800 nm). The complexes exhibit maximum two-photon absorption at a shorter wavelength than 2 lambda for the one-photon band, consistent with the dominant two-photon transition arising from a two-photon-allowed gerade-gerade transition. Nanosecond transient absorption experiments carried out on several of the complexes with excitation at 803 nm confirm that the long-lived triplet state can be produced efficiently via a sequence involving two-photon excitation to produce S(1), followed by intersystem crossing to produce T(1).
C1 Univ Florida, Dept Chem, Gainesville, FL 32611 USA.
USAF, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
Universal Energy Syst Inc, Dayton, OH 45432 USA.
AT&T Govt Solut, Dayton, OH 45432 USA.
Gen Dynam Informat Technol, Dayton, OH 45431 USA.
Univ Dayton, Dept Chem, Dayton, OH 45469 USA.
Sci Applicat Int Corp, Dayton, OH 45431 USA.
Montana State Univ, Dept Phys, Bozeman, MT 59717 USA.
RP Cooper, TM (reprint author), Univ Florida, Dept Chem, Gainesville, FL 32611 USA.
EM Thomas.Cooper@wpafb.af.mil; rebane@physics.montana.edu;
kschanze@chem.ufl.edu
RI Rebane, Aleksander/A-8299-2008; Schanze, Kirk/A-7200-2009
OI Schanze, Kirk/0000-0003-3342-4080
NR 72
TC 103
Z9 103
U1 3
U2 29
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 AUG 6
PY 2007
VL 46
IS 16
BP 6483
EP 6494
DI 10.1021/ic700549n
PG 12
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 194LF
UT WOS:000248345200038
PM 17622140
ER
PT J
AU Decker, DT
McNamara, LF
AF Decker, Dwight T.
McNamara, Leo F.
TI Validation of ionospheric weather predicted by Global Assimilation of
Ionospheric Measurements (GAIM) models
SO RADIO SCIENCE
LA English
DT Article
AB [1] The ability of the Utah State University ( USU) Global Assimilation of Ionospheric Measurements ( GAIM) model to specify the day- to- day variability of the ionosphere is assessed by comparison of specified hourly values of foF2 with observations that were not assimilated by the model. If the specifications are to be an improvement over a climatological model with zero average error, the interdecile width of errors of the specifications at each hour must be less than the interdecile width of the observations. It has been found that the median specified values of foF2 for undisturbed days are quite accurate, and that the interdecile width of errors of the specifications is less than that of the observations most of the time for midlatitude sites, provided there is a GPS TEC site sufficiently close to the ionosonde site. The errors in GAIM values of foF2 for Australian locations tend to be larger for larger distances from a GPS site, and for low latitudes. GAIM also tracks the values of foF2 on disturbed days, but tends to be conservative, not reproducing the full extent of the departures of the disturbed values from the background values.
C1 Air Force Res Lab, Space Vehicles Directorate, Hanscom AFB, MA USA.
Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA.
RP Decker, DT (reprint author), Air Force Res Lab, Space Vehicles Directorate, Hanscom AFB, MA USA.
EM leo.mcnamara@ctr.hanscom.af.mil
NR 7
TC 15
Z9 15
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0048-6604
J9 RADIO SCI
JI Radio Sci.
PD AUG 2
PY 2007
VL 42
IS 4
AR RS4017
DI 10.1029/2007RS003632
PG 9
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
GA 198DN
UT WOS:000248607300001
ER
PT J
AU Gupta, PK
Miracle, DB
AF Gupta, Prabhat K.
Miracle, Daniel B.
TI A topological basis for bulk glass formation
SO ACTA MATERIALIA
LA English
DT Article
DE bulk amorphous materials; metallic glasses; liquids; modeling
ID METALLIC GLASSES; AMORPHOUS-ALLOYS; FORMING ABILITY; SUPERCOOLED LIQUID;
MECHANICAL-PROPERTIES; THERMAL-STABILITY; STRUCTURAL MODEL; RANGE ORDER;
PD-SI; PHASE
AB The shifting of bulk metallic glass compositions from their respective nearest eutectics is rationalized in terms of the variation of the glass transition temperature with composition near the eutectic. The composition dependence of the glass transition temperature is established by considering the competition between the internal degrees of freedom and the bond constraints between unlike atoms. The average bond constraint model requires as input only information that is readily available for any system of interest and provides estimates of. (i) the minimum solute concentration needed to form bulk metallic glass; (ii) the trend in the glass transition temperature as a function of composition; and (iii) the shift of the bulk metallic glass composition from the eutectic composition. (C) 2007 Published by Elsevier Ltd on behalf of Acta Materialia Inc.
C1 Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Gupta, PK (reprint author), Ohio State Univ, Dept Mat Sci & Engn, 116 W 19Th Ave, Columbus, OH 43210 USA.
EM gupta.3@osu.edu
NR 54
TC 8
Z9 8
U1 0
U2 7
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 AUG
PY 2007
VL 55
IS 13
BP 4507
EP 4515
DI 10.1016/j.actamat.2007.04.026
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 195UC
UT WOS:000248436400027
ER
PT J
AU Sullivan, PD
Stone, BR
Hashisho, Z
Rood, MJ
AF Sullivan, Patrick D.
Stone, Brenton R.
Hashisho, Zaher
Rood, Mark J.
TI Water adsorption with hysteresis effect onto microporous activated
carbon fabrics
SO ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
LA English
DT Article; Proceedings Paper
CT 9th International Conference on Fundamentals of Adsorption (FOA9)
CY MAY 20-25, 2007
CL Sicily, ITALY
SP Int Adsorpt Soc
DE Activated Carbon Fiber Cloth (ACFC); water vapor adsorption; hysteresis;
isotherm models
ID VAPOR ADSORPTION; ELECTROTHERMAL DESORPTION; SURFACE-CHEMISTRY; ISOTHERM
EQUATION; POROUS CARBON; GAS STREAMS; MODEL; EQUILIBRIUM; ADSORBENTS;
REMOVAL
AB Understanding the adsorption of water vapor onto activated carbons is important for designing processes to remove dilute contaminants from humid gas streams, such as providing protection against chemical warfare agents (CWAs), or against toxic industrial compounds (TICs) used in a terrorist chemical attack. Water vapor isotherms for Calgon BPL granular activated carbon (GAC), military ASZM-TEDA GAC, electrospun activated carbon nanofibers (ACnF), Calgon Zorflex (TM) activated carbon cloth, and Novoloid-based activated carbon fiber cloth (ACFC) are presented. Of particular interest are the ACFC isotherms, which exhibit an unusually high degree of hydrophobicity. The ACFC isotherms also show a correlation between water vapor adsorption hysteresis and the level of activation. Water vapor isotherm models from the literature are compared.
C1 USAF, Res Lab, Airbase Technol Div, Tyndall AFB, FL 32403 USA.
Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA.
RP Sullivan, PD (reprint author), USAF, Res Lab, Airbase Technol Div, 139 Barnes Dr Ste 2, Tyndall AFB, FL 32403 USA.
EM patrick.sullivan@tyndall.af.mil
NR 38
TC 38
Z9 38
U1 7
U2 22
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0929-5607
J9 ADSORPTION
JI Adsorpt.-J. Int. Adsorpt. Soc.
PD AUG
PY 2007
VL 13
IS 3-4
BP 173
EP 189
DI 10.1007/s10450-007-9033-5
PG 17
WC Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 236MM
UT WOS:000251307100002
ER
PT J
AU Petkovska, M
Antov-Bozalo, D
Markovic, A
Sullivan, P
AF Petkovska, Menka
Antov-Bozalo, Danijela
Markovic, Ana
Sullivan, Patrick
TI Multiphysics modeling of electric-swing adsorption system with in-vessel
condensation
SO ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
LA English
DT Article; Proceedings Paper
CT 9th International Conference on Fundamentals of Adsorption (FOA9)
CY MAY 20-25, 2007
CL Sicily, ITALY
SP Int Adsorpt Soc
DE multiphysics modeling; Electric-Swing Adsorption (ESA); electrothermal
desorption; in-vessel condensation
ID ACTIVATED CARBON MONOLITH; ELECTROTHERMAL DESORPTION; ORGANIC VAPORS;
GAS SEPARATION; FIBER CLOTH; RADIAL-FLOW; REGENERATION; RECOVERY;
TEMPERATURE; ADSORBENTS
AB Mathematical modeling of an Electric-Swing Adsorption (ESA) system (adsorption cycle with electrothermal desorption step, performed by direct heating of the adsorbent particles by passing electric current through them), with annular, radial-flow, cartridge-type fixed-bed and in-vessel condensation, is performed by using Comsol Multiphysics (TM) software. Three multiphysics models are built, in order to describe three stages of a compete ESA cycle: adsorption, electrothermal desorption before the start of condensation and electrothermal desorption with in-vessel condensation. In order to describe the complete ESA cycle the models for the three stages are integrated, by using a combination of Comsol Multiphysics (TM) and Matlab (TM). The models were successfully used for simulation of separate stages of the process and of the complete ESA cycles, as well as for investigation of the influences of the main operational parameters on the process performance.
C1 Univ Belgrade, Fac Technol & Met, Dept Chem Engn, Belgrade, Serbia.
USAF, Res Lab, Tyndall AFB, FL USA.
RP Petkovska, M (reprint author), Univ Belgrade, Fac Technol & Met, Dept Chem Engn, Belgrade, Serbia.
EM menka@tmf.bg.ac.yu
NR 29
TC 6
Z9 7
U1 2
U2 12
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0929-5607
J9 ADSORPTION
JI Adsorpt.-J. Int. Adsorpt. Soc.
PD AUG
PY 2007
VL 13
IS 3-4
BP 357
EP 372
DI 10.1007/s10450-007-9028-2
PG 16
WC Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 236MM
UT WOS:000251307100023
ER
PT J
AU Rizzetta, DP
Visbal, MR
AF Rizzetta, Donald P.
Visbal, Miguel R.
TI Direct numerical simulations of flow past an array of distributed
roughness elements
SO AIAA JOURNAL
LA English
DT Article; Proceedings Paper
CT AIAA 36th Fluid Dynamics Conference
CY JUN 05-08, 2006
CL San Francisco, CA
SP Amer Inst Aeronaut & Astronaut
ID LARGE-EDDY SIMULATION; FREE-STREAM TURBULENCE; LAMINAR BOUNDARY-LAYER;
DELTA-WING ROLL; SHALLOW BUMP; GROWTH; DISTURBANCES; COMPUTATION;
FLOWFIELDS; UNSTEADY
AB Direct numerical simulation was used to describe the subsonic flow past an array of distributed cylindrical roughness elements mounted on a flat plate. Solutions were obtained for element heights corresponding to a roughness-based Reynolds number (Re-k)of both 202 and 334. The numerical method used a sixth-order-accurate centered compact finite difference scheme to represent spatial derivatives, which was used in conjunction with a tenth-order low-pass Pade-type nondispersive filter operator to maintain stability. An implicit approximately factored time-marching algorithm was employed, and Newton-like subiterations were applied to achieve second-order temporal accuracy. Calculations were carried out on a massively parallel computing platform, using domain decomposition to distribute subzones on individual processors. A high-order overset grid approach preserved spatial accuracy on the mesh system used to represent the roughness elements. Features of the flowfields are described, and results of the computations are compared with experimentally measured velocity components of the time-mean flowfield, which are available only for Re-k = 202. Flow about the elements is characterized by a system of two weak corotating horseshoe vortices. For Re-k = 334, an unstable shear layer emanating from the top of the cylindrical element generated nonlinear unsteady disturbances of sufficient amplitude to produce explosive bypass transition downstream of the array. The Re-k = 202 case displayed exponential growth of turbulence energy in the streamwise direction, which may eventually result in transition.
C1 USAF, Res Lab, Computat Sci Branch, Wright Patterson AFB, OH 45433 USA.
RP Rizzetta, DP (reprint author), USAF, Res Lab, Computat Sci Branch, Wright Patterson AFB, OH 45433 USA.
NR 50
TC 35
Z9 36
U1 2
U2 13
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
J9 AIAA J
JI AIAA J.
PD AUG
PY 2007
VL 45
IS 8
BP 1967
EP 1976
DI 10.2514/1.25916
PG 10
WC Engineering, Aerospace
SC Engineering
GA 195BE
UT WOS:000248386700017
ER
PT J
AU Gidvani, V
Ramkissoon, S
Sloand, EM
Young, NS
AF Gidvani, Vinod
Ramkissoon, Shakti
Sloand, Elaine M.
Young, Neal S.
TI Cytokine gene polymorphisms in acquired bone marrow failure
SO AMERICAN JOURNAL OF HEMATOLOGY
LA English
DT Article
ID TRANSFORMING GROWTH FACTOR-BETA(1); SINGLE NUCLEOTIDE POLYMORPHISMS;
IFN-GAMMA GENE; APLASTIC-ANEMIA; PROMOTER POLYMORPHISM;
INTERFERON-GAMMA; 1ST INTRON; TNF-ALPHA; T-CELLS; RISK
AB Some acquired aplastic anemia (AA) results from immune-mediated destruction of hematopoietic stem cells. Cytokine gene polymorphisms are implicated in controlling cytokine production and increasing the susceptibility to some autoimmune diseases. We characterized the IL-6/-174, TNF-alpha/-308, IL-10/-1082, IFN-gamma/+874, TGF beta 1/-509 single nucleotide polymorphisms (SNP's) and the IL1-RA second intron variable number tandem repeat (VNTR) alleles in 73 patients with AA and compared the frequency of genotypes to established control populations. We found that some patients with acquired AA have polymorphisms which are linked to high production of proinflammatory cytokines, particularly TNF-alpha and IFN-gamma.
C1 NHLBI, Hematol Branch, Div Intramural Res, Bethesda, MD 20892 USA.
Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
RP Sloand, EM (reprint author), NHLBI, Hematol Branch, Div Intramural Res, Bldg 10, Bethesda, MD 20892 USA.
EM sloande@nih.gov
NR 21
TC 22
Z9 27
U1 0
U2 0
PU WILEY-LISS
PI HOBOKEN
PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0361-8609
J9 AM J HEMATOL
JI Am. J. Hematol.
PD AUG
PY 2007
VL 82
IS 8
BP 721
EP 724
DI 10.1002/ajh.20881
PG 4
WC Hematology
SC Hematology
GA 200FM
UT WOS:000248749300006
PM 17373677
ER
PT J
AU Howe, AS
Boden, BP
AF Howe, Allyson S.
Boden, Barry P.
TI Heat-related illness on athletes
SO AMERICAN JOURNAL OF SPORTS MEDICINE
LA English
DT Article
DE heat stroke; heat exhaustion; dehydration; prevention
ID PRESEASON PRACTICES; FOOTBALL PLAYERS; STROKE; HEATSTROKE; TEMPERATURE;
MANAGEMENT; DISORDERS; EXERCISE; STRESS; SODIUM
AB Heat stroke in athletes is entirely preventable. Exertional heat illness is generally the result of increased heat production and impaired dissipation of heat. It should be treated aggressively to avoid life-threatening complications. The continuum of heat illness includes mild disease (heat edema, heat rash, heat cramps, heat syncope), heat exhaustion, and the most severe form, potentially life-threatening heat stroke. Heat exhaustion typically presents with dizziness, malaise, nausea, and vomiting, or excessive fatigue with accompanying mild temperature elevations. The condition can progress to heat stroke without treatment. Heat stroke is the most severe form of heat illness and is characterized by core temperature >104 degrees F with mental status changes. Recognition of an athlete with heat illness in its early stages and initiation of treatment will prevent morbidity and mortality from heat stroke. Risk factors for heat illness include dehydration, obesity, concurrent febrile illness, alcohol consumption, extremes of age, sickle cell trait, and supplement use. Proper education of coaches and athletes, identification of high-risk athletes, concentration on preventative hydration, acclimatization techniques, and appropriate monitoring of athletes for heat-related events are important ways to prevent heat stroke. Treatment of heat illness focuses on rapid cooling. Heat illness is commonly seen by sideline medical staff, especially during the late spring and summer months when temperature and humidity are high. This review presents a comprehensive list of heat illnesses with a focus on sideline treatments and prevention of heat illness for the team medical staff.
C1 Malcolm Grow Med Ctr Family Med Residency, Andrews AFB, MD USA.
Orthopaed Ctr, Rockville, MD USA.
RP Howe, AS (reprint author), Family Med Clin, 1075 W Perimeter Rd, Andrews AFB, MD 20762 USA.
EM allyhowe@hotmail.com
NR 45
TC 61
Z9 64
U1 3
U2 36
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0363-5465
J9 AM J SPORT MED
JI Am. J. Sports Med.
PD AUG
PY 2007
VL 35
IS 8
BP 1384
EP 1395
DI 10.1177/0363546507305013
PG 12
WC Orthopedics; Sport Sciences
SC Orthopedics; Sport Sciences
GA 196AB
UT WOS:000248452500023
PM 17609528
ER
PT J
AU Calabria, CW
Dice, J
AF Calabria, Christopher W.
Dice, John
TI Aeroallergen sensitization rates in military children with rhinitis
symptoms
SO ANNALS OF ALLERGY ASTHMA & IMMUNOLOGY
LA English
DT Article
ID SKIN-TEST REACTIVITY; NUTRITION EXAMINATION SURVEY; INNER-CITY HOMES;
ALLERGIC RHINITIS; RESPIRATORY SYMPTOMS; NATIONAL-HEALTH; MOUSE
ALLERGEN; RISK-FACTOR; FOLLOW-UP; ASTHMA
AB Background: Childhood sensitization rates for many aeroallergens are underreported.
Objectives: To examine aeroallergen sensitization rates in military children undergoing skin testing for rhinitis and investigate the timing of atopic development for perennial and seasonal allergens.
Methods: A skin testing database was retrospectively analyzed. Children 18 years and younger referred for rhinitis underwent skin prick testing to either a screening panel of 8 tests or a standard panel of 51 allergens.
Results: A total of 209 patients underwent skin testing to the 8-test panel. Of these patients, 35.4% had at least 1 positive result. Atopy increased with age, from 6.3% in those younger than 1 year to 58.8% in those 5 years old. The most common allergens were mold mix (16.3%), cat (13.2%), dust mite mix (11.4%), tree mix (9.4%), and grass mix (9.4%). Only 4.0% were sensitized to seasonal aeroallergens before the age of 3 years. A total of 345 children underwent testing to a 51-allergen panel. A total of 80.3% had at least I positive test result, and the average number of positive test results was 11.4. Both the percentage of atopy and the average number of positive skin test results increased with age. The most common allergens were grasses, Alternaria, and cottonwood. Thirty-two of 51 allergens were positive in 20% or more children. Rates for many underreported allergens presented.
Conclusions: In children, aeroallergen sensitization rates are high and increase with age. Perennial allergens predominate up to the age of 3 years. Rates for many underreported allergens are presented. Although performed in a military population, these results should be applicable to many practices.
C1 Wilford Hall USAF Med Ctr, Dept Allergy & Immunol, Lackland AFB, TX 78236 USA.
RP Calabria, CW (reprint author), Wilford Hall USAF Med Ctr, Dept Allergy & Immunol, Lackland AFB, TX 78236 USA.
EM christopher.calabria@lackland.af.mil
NR 34
TC 14
Z9 14
U1 1
U2 1
PU AMER COLL ALLERGY ASTHMA IMMUNOLOGY
PI ARLINGTON HTS
PA 85 WEST ALGONQUIN RD SUITE 550, ARLINGTON HTS, IL 60005 USA
SN 1081-1206
J9 ANN ALLERG ASTHMA IM
JI Ann. Allergy Asthma Immunol.
PD AUG
PY 2007
VL 99
IS 2
BP 161
EP 169
PG 9
WC Allergy; Immunology
SC Allergy; Immunology
GA 197TI
UT WOS:000248579000010
PM 17718104
ER
PT J
AU Bochovel, EJ
Corcoran, CJ
AF Bochovel, Erik J.
Corcoran, Christopher J.
TI In-phase supermode selection in a multicore fiber laser array by means
of a self-Fourier external cavity
SO APPLIED OPTICS
LA English
DT Article
ID MODAL-ANALYSIS; LOCKING; AREA
AB A procedure is developed to determine the transverse-mode structure of a cavity consisting of a dense, evanescently coupled, waveguide laser array, which, in addition, is externally coupled by feedback from an external cavity. The formalism is used to determine the loss and phasing properties of a multicore fiber array coupled to an external self-Fourier cavity. Best performance is predicted for linear arrays of up to five cores, or two-dimensional arrays of up to 25 cores. A low-loss, in-phase, fundamental array mode is predicted, which achieves better than 30 dB discrimination against higher-order modes at periodically spaced values of the array length. However, we show that a shift in operating wavelength of typically a few nanometers can bring about near-perfect phasing and loss operation over a continuum of fiber lengths. With increased fill factor, significantly more of the output power can be concentrated in the central lobe of the far field but at the penalty of increased loss in the fundamental eigenmode. (c) 2007 Optical Society of America.
C1 USAF, Kirtland AF Base, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
Corcoran Engn Inc, Newton, MA 02465 USA.
RP Bochovel, EJ (reprint author), USAF, Kirtland AF Base, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
EM bochovee@plk.af.mil
NR 17
TC 9
Z9 12
U1 0
U2 1
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 AUG 1
PY 2007
VL 46
IS 22
BP 5009
EP 5018
DI 10.1364/AO.46.005009
PG 10
WC Optics
SC Optics
GA 206EQ
UT WOS:000249167100022
PM 17676108
ER
PT J
AU Sloan, GC
Jura, M
Duley, WW
Kraemer, KE
Bernard-Salas, J
Forrest, WJ
Sargent, B
Li, A
Barry, DJ
Bohac, CJ
Watson, DM
Houck, JR
AF Sloan, G. C.
Jura, M.
Duley, W. W.
Kraemer, K. E.
Bernard-Salas, J.
Forrest, W. J.
Sargent, B.
Li, A.
Barry, D. J.
Bohac, C. J.
Watson, D. M.
Houck, J. R.
TI The unusual hydrocarbon emission from the early carbon star HD 100764:
The connection between aromatics and aliphatics
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE circumstellar matter; stars : carbon
ID HYDROGENATED AMORPHOUS-CARBON; UNIDENTIFIED INFRARED-EMISSION; NEED
ULTRAVIOLET EXCITATION; PROTO PLANETARY-NEBULAE;
SPITZER-SPACE-TELESCOPE; T-TAURI STARS; REFLECTION NEBULAE; MIDINFRARED
SPECTROSCOPY; PHOTOCHEMICAL EVOLUTION; MICRON SPECTROSCOPY
AB We have used the Infrared Spectrograph (IRS) on the Spitzer Space Telescope to obtain spectra of HD 100764, an apparently single carbon star with a circumstellar disk. The spectrum shows emission features from polycyclic aromatic hydrocarbons (PAHs) that are shifted to longer wavelengths than normally seen, a characteristic of "class C'' systems in the classification scheme of Peeters et al. All seven of the known class C PAH sources are illuminated by radiation fields that are cooler than those which typically excite PAH emission features. The observed wavelength shifts are consistent with hydrocarbon mixtures containing both aromatic and aliphatic bonds. We propose that the class C PAH spectra are distinctive because the carbonaceous material has not been subjected to a strong ultraviolet radiation field, allowing relatively fragile aliphatic materials to survive.
C1 Cornell Univ, Dept Astron, Ithaca, NY 14853 USA.
Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
Univ Calif Los Angeles, Ctr Astrobiol, Los Angeles, CA 90095 USA.
Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada.
AF Res Lab, Bedford, MA 01731 USA.
Univ Rochester, Dept Phys & Astron, Rochester, NY USA.
Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA.
RP Sloan, GC (reprint author), Cornell Univ, Dept Astron, Ithaca, NY 14853 USA.
EM sloan@isc.astro.cornell.edu; jura@astro.ucla.edu; wwduley@uwaterloo.ca;
kathleen.kraemer@hanscom.af.mil; jbs@isc.astro.cornell.edu;
forrest@pas.rochester.edu; bsargent@pas.rochester.edu; lia@missouri.edu;
don@isc.astro.cornell.edu; cbohac@pas.rochester.edu;
dmw@pas.rochester.edu; jrh13@cornell.edu
OI Kraemer, Kathleen/0000-0002-2626-7155
NR 65
TC 84
Z9 84
U1 1
U2 9
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 2007
VL 664
IS 2
BP 1144
EP 1153
DI 10.1086/519236
PN 1
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 199CY
UT WOS:000248675000046
ER
PT J
AU Gibb, RW
AF Gibb, Randall W.
TI Visual spatial disorientation: Revisiting the black hole illusion
SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE
LA English
DT Review
DE aviation safety; controlled flight into terrain; approach and landing
accidents; visual illusions; featureless terrain illusion; aviation
visual perception
ID PILOT PERFORMANCE; TOUCHDOWN POINT; APPROACH ANGLE; RUNWAY MODEL;
AIR-FORCE; PERCEPTION; LANDINGS; SLANT; ORIENTATION
AB Spatial disorientation (SD) is often cited as a contributor to aviation accidents. A specific type of visual SD, the "black-hole illusion" (BHI), occurs on approach to landing at night when the outside view lacks cues to terrain around the lighted runway. Pilots too often confidently proceed with a visual approach despite the impoverished visual conditions; the BHI then causes them to experience glide path overestimation (GPO) so that they initiate an inappropriately steep descent. The result is a shallow approach that lies below the correct glide path for obstacle clearance. This review explores the origins of the BHI and describes several mishaps involving it. Nine possible reasons for pilot misperception leading to GPO are described: constancy of apparent size-shape-depth; conflict between familiar and relative size; overestimation of visual angles in the medial extent; deficient terrain orientation cues; lack of distance cues; disparity between optical and geographical slant; perception of approach lighting systems; tendency toward equidistance; and misperception of slant. Mishaps involving visual SD are not pilot error, but demonstrate a perceptual limitation, and more needs to be learned regarding when and where the BHI may occur. It is already clear, however, pilots should be taught that confidence in their visual capabilities during impoverished viewing conditions greatly exceed their perceptual abilities. With the increase in night flying in military and civilian settings, reduction in landing mishaps will depend in part on inclusion of visual SD scenarios in initial and refresher pilot training with presentation of BHI scenarios in annual flight simulator sessions.
C1 USAF Acad, DFBL, Colorado Springs, CO 80840 USA.
Arizona State Univ, Dept Ind Engn, Tempe, AZ USA.
RP Gibb, RW (reprint author), USAF Acad, DFBL, 2354 Fairchild,Suite 5457, Colorado Springs, CO 80840 USA.
EM randall.gibb@usafa.af.mil
NR 64
TC 9
Z9 9
U1 2
U2 5
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 0095-6562
J9 AVIAT SPACE ENVIR MD
JI Aviat. Space Environ. Med.
PD AUG
PY 2007
VL 78
IS 8
BP 801
EP 808
PG 8
WC Public, Environmental & Occupational Health; Medicine, General &
Internal; Sport Sciences
SC Public, Environmental & Occupational Health; General & Internal
Medicine; Sport Sciences
GA 198NG
UT WOS:000248634200009
PM 17760289
ER
PT J
AU Greeley, HP
Berg, J
Friets, E
Wilson, J
Greenough, G
Picone, J
Whitmore, J
Nesthus, T
AF Greeley, Harold P.
Berg, Joel
Friets, Eric
Wilson, John
Greenough, Glen
Picone, Joseph
Whitmore, Jeffrey
Nesthus, Thomas
TI Fatigue estimation using voice analysis
SO BEHAVIOR RESEARCH METHODS
LA English
DT Article
ID SPEECH; ACCIDENT; RISK
AB In the present article, we present a means to remotely and transparently estimate an individual's level of fatigue by quantifying changes in his or her voice characteristics. Using Voice analysis to estimate fatigue is unique from established cognitive measures in a number of ways: (1) speaking is a natural activity requiring no initial training or learning curve, (2) voice recording is a unobtrusive operation allowing the speakers to go about their normal work activities, (3) using telecommunication infrastructure (radio, telephone, etc.) a diffuse set of remote populations can be monitored at a central location, and (4) often, previously recorded voice data are available for post hoc analysis. By quantifying changes in the mathematical coefficients that describe the human speech production process, we were able to demonstrate that for speech sounds requiring a large average air flown a speaker's voice changes in synchrony with both direct measures of fatigue and with changes predicted by the length of time awake.
C1 Creare Res & Dev Inc, Hanover, NH 03755 USA.
Dartmouth Hitchcock Med Ctr, Lebanon, NH 03766 USA.
Univ Mississippi, Starksville, MS USA.
USAF, Res Lab, Brooks AFB, TX USA.
FAA Civil Aerosp Med Inst, Oklahoma City, OK USA.
RP Greeley, HP (reprint author), Creare Res & Dev Inc, Box 71, Hanover, NH 03755 USA.
EM hpg.ra@verizon.net
NR 15
TC 11
Z9 11
U1 0
U2 3
PU PSYCHONOMIC SOC INC
PI AUSTIN
PA 1710 FORTVIEW RD, AUSTIN, TX 78704 USA
SN 1554-351X
J9 BEHAV RES METHODS
JI Behav. Res. Methods
PD AUG
PY 2007
VL 39
IS 3
BP 610
EP 619
DI 10.3758/BF03193033
PG 10
WC Psychology, Mathematical; Psychology, Experimental
SC Psychology
GA 215VP
UT WOS:000249837400032
PM 17958175
ER
PT J
AU Boyle, SH
Jackson, WG
Suarez, EC
AF Boyle, Stephen H.
Jackson, William G.
Suarez, Edward C.
TI Hostility, anger, and depression predict increases in C3 over a 10-year
period
SO BRAIN BEHAVIOR AND IMMUNITY
LA English
DT Article
DE complement; hostility; anger; depression; men
ID ADRENERGIC-RECEPTOR RESPONSIVENESS; ACUTE MYOCARDIAL-INFARCTION;
CORONARY-HEART-DISEASE; COMPLEMENT C3; REACTIVE PROTEIN; PLASMA
INTERLEUKIN-6; INSULIN-RESISTANCE; METABOLIC SYNDROME; BLOOD MONOCYTES;
RISK-FACTORS
AB We examined the relation of hostility, anger, and depression to 10-year changes in the third (C3), and fourth (C4) complement in 313, apparently healthy male participants enrolled in the Air Force Health Study (AFHS), a 20-year study designed to evaluate the health co sequences of dioxin exposure. Hostility, depression, and anger were assessed using subscales from the Minnesota Multiphasic Personality Inventory (MMPI), which was administered in 1985. Given the high intercorrelations among these psychological scales, we used a principal component analysis to generate a composite score representing the linear combination of the hostility, anger, and depression scales. The dependent variables, C3 and C4 levels, were determined from samples collected in 1992, 1997, and 2002. Regression analyses controlling for age, race, alcohol use, body mass index, and cigarette use as well as onset of disease, and use of lipid lowering and blood pressure medications during follow-up revealed a significant time x composite score interaction for C3 complement (p <.0003), but not C4. Post-hoc analyses revealed that high composite scores were associated with larger 10-year increases in C3. These observations suggest that men who are hostile and are prone to experience frequent and intense feelings of anger, and depression show activation of the complement system, and specifically increases in C3, that may contribute to the development of coronary heart disease. (C) 2007 Elsevier Inc. All rights reserved.
C1 Duke Univ, Med Ctr, Dept Psychiat & Behav Sci, Durham, NC 27710 USA.
USAF, Res Lab, Brooks City Base, TX USA.
RP Boyle, SH (reprint author), Duke Univ, Med Ctr, Dept Psychiat & Behav Sci, POB 3328, Durham, NC 27710 USA.
EM boyle020@mc.duke.edu; suare001@mc.duke.edu
FU NHLBI NIH HHS [R01 HL067459-05, HL67459, R01 HL067459]
NR 61
TC 22
Z9 24
U1 1
U2 6
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0889-1591
J9 BRAIN BEHAV IMMUN
JI Brain Behav. Immun.
PD AUG
PY 2007
VL 21
IS 6
BP 816
EP 823
DI 10.1016/j.bbi.2007.01.008
PG 8
WC Immunology; Neurosciences
SC Immunology; Neurosciences & Neurology
GA 196SG
UT WOS:000248501700012
PM 17321106
ER
PT J
AU Dunlow, N
Phillips, C
Broder, HL
AF Dunlow, Neil
Phillips, Ceib
Broder, Hillary L.
TI Concurrent validity of the COHIP
SO COMMUNITY DENTISTRY AND ORAL EPIDEMIOLOGY
LA English
DT Article
DE child oral health impact profile; facial image; Oral health-related
quality of life; self-concept; social anxiety
ID QUALITY-OF-LIFE; DENTOFACIAL DEFORMITY; SOCIAL SUPPORT; RELIABILITY;
VALIDATION; QUESTIONNAIRE; SCALES
AB Objectives: This study examined the relationship between children's perception of their OHRQOL and their perceptions of their dentofacial image, social anxiety, and self-concept as an assessment of the concurrent validity for the Child Oral Health Impact Profile (COHIP). Methods: A nonrandom, consecutive sample of children, ages nine to 14 years, was recruited for this observational validation study. Participants had been accepted for treatment in the University of North Carolina Graduate Orthodontic clinic. Data were collected after gathering initial orthodontic records and prior to delivery of any fixed or removable orthodontic appliances. Participants completed the COHIP and standardized dimension-specific questionnaires with known psychometric properties designed to assess self-concept, social anxiety, and perception of facial image. Child assent with caregiver consent was obtained prior to data collection. Pearson's correlations between each of the domains of the COHIP and the Dento-facial Image, the Social Anxiety Scale, and the self-concept domains of the Multidimensional Self Concept Scale (MSCS) were calculated. Criteria for support of concurrent validity was established based on directionality of expected relationships and strength of the observed correlation coefficient. Each correlation was assessed as meeting or not meeting the criteria. A one-tailed one sample Z-test was used to test the null hypothesis that 58% of the calculated correlations would meet the criteria (expected a priori) with an alterative that less than 58% would meet the criteria. Results: The average age of the 52 subjects enrolled was 11.8; 40% were male; and 85% were Caucasian. The hypothesis that 58% of the calculated correlations defined a priori as expected relationships would meet the criteria was supported by the data (P = 0.63). The perception of dentofacial appearance was positively correlated (range = 0.39 to 0.45; with all of the COHIP domains except for the School domain. Overall, the COHIP domains, particularly Self-linage and Social Emotional subscales, were positively correlated (0.32-0.52) with the MSCS self-concept domain scores, except Family Self-Concept. The COHIP domains, particularly Functional Well-being and Social Emotional subscales, were negatively correlated (-0.76 to -0.33) with the three Social Anxiety subscales that include both fear of negative evaluation and social avoidance. Conclusions: The findings in this study lend support to the validity of the COHIP since 77% of the expected relationships between the domains of the COHIP and the domains of eneral, standardized dimension-specific 9 instruments were observed. The decision to use condition-specific, dimension-specific, or general quality of life (QOL) measures is dependent on the purpose of the study. For investigations in children on the effect of dental treatments or in epidemiologic studies of an oral health outcome, the use of condition-specific QOL measures like the COHIP have the advantages of increased patient responsiveness since the assessment is focused on a specific condition, oral health, and increased sensitivity to treatment effects.
C1 Univ N Carolina, Dept Orthodont, Chapel Hill, NC 27515 USA.
USAF, Dent Corp, Omaha, NE USA.
Univ Med & Dent New Jersey, New Jersey Dent Sch, Dept Commun Hlth, Newark, NJ 07103 USA.
RP Dunlow, N (reprint author), Univ N Carolina, Dept Orthodont, Chapel Hill, NC 27515 USA.
EM ceib_phillips@dentistry.unc.edu
FU NIDCR NIH HHS [R01 DE 005215, R01 DE 13732, R01 DE005215, R01
DE005215-29, R01 DE013732]
NR 28
TC 22
Z9 22
U1 1
U2 7
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0301-5661
J9 COMMUNITY DENT ORAL
JI Community Dentist. Oral Epidemiol.
PD AUG
PY 2007
VL 35
SU 1
BP 41
EP 49
DI 10.1111/j.1600-0528.2007.00404.x
PG 9
WC Dentistry, Oral Surgery & Medicine; Public, Environmental & Occupational
Health
SC Dentistry, Oral Surgery & Medicine; Public, Environmental & Occupational
Health
GA 194VK
UT WOS:000248371700005
PM 17615049
ER
PT J
AU Crawford, KM
Harrington, A
Boyd, J
Veneracion, M
AF Crawford, Kevin M.
Harrington, Allan
Boyd, Jason
Veneracion, Melissa
TI Utilization of Mohs specimen as a sizing template in full-thickness skin
grafts
SO DERMATOLOGIC SURGERY
LA English
DT Article
C1 Emory Univ, Dept Dermatol, Dermatol Clin, Atlanta, GA 30322 USA.
Johns Hopkins Univ, Dept Dermatol, Baltimore, MD 21218 USA.
Malcolm Grow Med Ctr, Andrews AFB, MD 20762 USA.
Anne Arundel Dermatol, Annapolis, MD USA.
RP Crawford, KM (reprint author), Emory Univ, Dept Dermatol, Dermatol Clin, 1365 Clifton Rd NE, Atlanta, GA 30322 USA.
EM Kevin_crawford@comcast.net
NR 2
TC 1
Z9 1
U1 0
U2 0
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 1076-0512
J9 DERMATOL SURG
JI Dermatol. Surg.
PD AUG
PY 2007
VL 33
IS 8
BP 973
EP 975
DI 10.1111/j.1524-4725.2007.33201.x
PG 3
WC Dermatology; Surgery
SC Dermatology; Surgery
GA 197ZU
UT WOS:000248597100011
PM 17661942
ER
PT J
AU Potter, MB
Bowers, SB
Pruitt, A
AF Potter, Mark B.
Bowers, Steven B.
Pruitt, Alejandro
TI Internal hernia with small bowel volvulus in a patient with altered gut
motility: A complication of direct percutaneous endoscopic jejunostomy
SO DIGESTIVE DISEASES AND SCIENCES
LA English
DT Article
DE direct percutaneous endoscopic jejunostomy; small bowel volvulus; small
bowel obstruction; transthyretin amyloidosis; superior mesentery artery
syndrome
ID OBSTRUCTION; ADULTS
C1 Brooke Army Med Ctr, Dept Med, Div Gastroenterol & Hepatol, Ft Sam Houston, TX 78234 USA.
Wilford Hall USAF Med Ctr, Dept Med, Div Gastroenterol & Hepatol, Lackland AFB, TX USA.
RP Potter, MB (reprint author), Brooke Army Med Ctr, Dept Med, Div Gastroenterol & Hepatol, 3851 Roger Brooke Dr, Ft Sam Houston, TX 78234 USA.
EM Mark.Potter@amedd.army.mil
NR 22
TC 3
Z9 3
U1 0
U2 0
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0163-2116
J9 DIGEST DIS SCI
JI Dig. Dis. Sci.
PD AUG
PY 2007
VL 52
IS 8
BP 1910
EP 1913
DI 10.1007/s10620-007-9813-5
PG 4
WC Gastroenterology & Hepatology
SC Gastroenterology & Hepatology
GA 185UN
UT WOS:000247736000027
PM 17393307
ER
PT J
AU Spottswood, M
Allemang, RJ
AF Spottswood, M.
Allemang, R. J.
TI On the investigation of some parameter identification and experimental
modal filtering issues for nonlinear reduced order models
SO EXPERIMENTAL MECHANICS
LA English
DT Article
DE reduced order models; identification; Duffing equations; Sonic fatigue
ID FRICTIONALLY EXCITED BEAM; DOMAIN
AB This paper discusses modal filtering of experimental data and the corresponding identification of linear and nonlinear parameters in reduced order space. Specifically, several experimental configurations will be discussed in order to provide insight into such identification issues as spatial discretization, observability, and the linear independence of the assumed filter or basis. The two experiments considered herein represent different measurement configurations of the same clamped-clamped beam. First, asymmetric inertial loading via asymmetric sensor location was considered, while the second scenario presents a symmetric sensor configuration. Several important conclusions can be drawn from the two experimental scenarios. First, by asymmetrically loading the beam, a corresponding asymmetric beam mode was excited yet not observable. In the second scenario, the symmetric distribution of sensors minimized the impact of the respective asymmetric mode. The resulting spatial information allowed for the proper filtering of the remnants of the asymmetric mode. Nonlinear parameters in modal space as well as the underlying linear parameters were successfully identified simultaneously in both experimental scenarios, although the usefulness of the asymmetrically loaded beam was limited. Finally, successful comparisons were made between the identified reduced order model and experimental response at the beam quarter point using the symmetric case and the beam midpoint using both experimental scenarios.
C1 USAF, Res Lab, VASM, Wright Patterson AFB, OH 45433 USA.
Univ Cincinnati, Dept Mech Ind Nucl Engn, Struct Dynam Res Lab, Cincinnati, OH 45221 USA.
RP Spottswood, M (reprint author), USAF, Res Lab, VASM, 2790 D St, Wright Patterson AFB, OH 45433 USA.
EM stephen.spottswood@wpafb.af.mil
NR 15
TC 9
Z9 9
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0014-4851
J9 EXP MECH
JI Exp. Mech.
PD AUG
PY 2007
VL 47
IS 4
BP 511
EP 521
DI 10.1007/s11340-007-9047-7
PG 11
WC Materials Science, Multidisciplinary; Mechanics; Materials Science,
Characterization & Testing
SC Materials Science; Mechanics
GA 189DQ
UT WOS:000247970000006
ER
PT J
AU Yang, M
Ma, N
Bliss, DF
Bryant, GG
AF Yang, Mei
Ma, Nancy
Bliss, David F.
Bryant, George G.
TI Melt motion during liquid-encapsulated Czochralski crystal growth in
steady and rotating magnetic fields
SO INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
LA English
DT Article; Proceedings Paper
CT International Conference on Modelling Fluid Flow (CMFF 06)
CY 2006
CL Budapest, HUNGARY
DE semiconductor crystal growth; numerical modelling; magnetic fields;
electromagnetic stirring; liquid encapsulated czochralski method; single
crystal growth
ID MOLTEN SEMICONDUCTOR; NUMERICAL-SIMULATION; BUOYANT CONVECTION; DOPANT
TRANSPORT; HEAT-TRANSFER; TEMPERATURE; PHOSPHIDE; CYLINDER; FLOW
AB During the liquid-encapsulated Czochralski (LEC) process, a single compound semiconductor crystal such as gallium-antimonide is grown by the solidification of an initially molten semiconductor (melt) contained in a crucible. The motion of the electrically-conducting molten semiconductor can be controlled with externally-applied magnetic fields. A steady magnetic field provides an electromagnetic stabilization of the melt motion during the LEC process. With a steady axial magnetic field alone, the melt motion produces a radially-inward flow below the crystal-melt interface. Recently, an extremely promising flow phenomenon has been revealed in which a rotating magnetic field induces a radially-inward flow below the crystal-melt interface that may significantly improve the compositional homogeneity in the crystal. This paper presents a model for the melt motion during the LEC process with steady and rotating magnetic fields. (c) 2006 Elsevier Inc. All rights reserved.
C1 N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA.
USAF, Geophys Lab, Sensors Directorate, AFRL SNHC, Bedford, MA 01731 USA.
RP Ma, N (reprint author), N Carolina State Univ, Dept Mech & Aerosp Engn, 2601 Stinson Dr,Campus Box 7910, Raleigh, NC 27695 USA.
EM nancy-ma@ncsu.edu
NR 26
TC 6
Z9 7
U1 3
U2 11
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0142-727X
J9 INT J HEAT FLUID FL
JI Int. J. Heat Fluid Flow
PD AUG
PY 2007
VL 28
IS 4
SI SI
BP 768
EP 776
DI 10.1016/j.ijheatfluidflow.2006.08.001
PG 9
WC Thermodynamics; Engineering, Mechanical; Mechanics
SC Thermodynamics; Engineering; Mechanics
GA 205TD
UT WOS:000249136600020
ER
PT J
AU Cinnamon, JD
Palazotto, AN
AF Cinnamon, John D.
Palazotto, Anthony N.
TI Further validation of a general approximation for impact penetration
depth considering hypervelocity gouging data
SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
LA English
DT Article
DE hypervelocity; VascoMax 300; 1080 steel; gouging
ID LONG RODS
AB A first-order approximation of penetration depth is developed for use in engineering design. A survey of available penetration data is used to construct a one-dimensional approach for estimating the geometry of a crater resulting from high-energy impact. The results are generalized to allow approximations to be made using existing experimental data without the requirement for laboratory testing. This approach for penetration depth approximation is validated using the hypervelocity gouging data from the Holloman High Speed Test Track (HHSTT) and hypervelocity gouging impact tests conducted by the authors. Published by Elsevier Ltd.
C1 USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Cinnamon, JD (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
EM john.cinnamon@afit.edu
NR 27
TC 4
Z9 4
U1 0
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0734-743X
J9 INT J IMPACT ENG
JI Int. J. Impact Eng.
PD AUG
PY 2007
VL 34
IS 8
BP 1307
EP 1326
DI 10.1016/j.ijimpeng.2006.08.005
PG 20
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 163XA
UT WOS:000246195300001
ER
PT J
AU Chang, Y
Guha, S
Grein, CH
Velicu, S
Flatte, ME
Nathan, V
Sivananthan, S
AF Chang, Yong
Guha, S.
Grein, C. H.
Velicu, S.
Flatte, M. E.
Nathan, V.
Sivananthan, S.
TI Absorption of narrow-gap HgCdTe near the band edge including
nonparabolicity and the urbach tail
SO JOURNAL OF ELECTRONIC MATERIALS
LA English
DT Article; Proceedings Paper
CT US Workshop on the Physics and Chemistry of II-IV Materials
CY OCT 10-12, 2006
CL Newport Beach, CA
DE HgCdTe; absorption; absorption coefficient; band structure; optical
constant; infrared
ID MOLECULAR-BEAM EPITAXY; OPTICAL-ABSORPTION; ENERGY-GAP; ALLOY
COMPOSITION; CRATER DEFECTS; HG1-XCDXTE; SPECTROSCOPY; TEMPERATURE;
HETEROSTRUCTURES; SEMICONDUCTORS
AB An analytical model describing the absorption behavior of Hg1-xCdxTe is developed. It simultaneously considers the contributions from non-parabolic conduction/light hole bands and parabolic heavy hole bands obtained from 14-band k center dot p electronic structure calculations and the Urbach tail. This model smoothly fits experimental absorption coefficients over energies ranging from the Urbach tail region to the intrinsic absorption region up to at least 300 meV above the band gap.
C1 Univ Illinois, Microphys Lab, Dept Phys MC273, Chicago, IL 60607 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
EPIR Technol Inc, Bolingbrook, IL 60440 USA.
Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
USAF, Res Lab, Kirtland AFB, NM 87117 USA.
RP Chang, Y (reprint author), Univ Illinois, Microphys Lab, Dept Phys MC273, Chicago, IL 60607 USA.
EM yonchang@uic.edu
NR 33
TC 3
Z9 3
U1 0
U2 2
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA
SN 0361-5235
J9 J ELECTRON MATER
JI J. Electron. Mater.
PD AUG
PY 2007
VL 36
IS 8
BP 1000
EP 1006
DI 10.1007/s11664-007-0162-0
PG 7
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA 207MK
UT WOS:000249255000031
ER
PT J
AU Watts, JD
Holt, DM
Beeson, TJ
Kirkpatrick, TC
Rutledge, RE
AF Watts, J. Dustin
Holt, Dennis M.
Beeson, Thomas J.
Kirkpatrick, Timothy C.
Rutledge, Richard E.
TI Effects of pH and mixing agents on the temporal setting of tooth-colored
and gray mineral trioxide aggregate
SO JOURNAL OF ENDODONTICS
LA English
DT Article
DE GMTA; mineral trioxide aggregate; MTA; pH; WMTA
ID END FILLING MATERIALS; MARGINAL ADAPTATION; LEAKAGE; REPAIR; MTA;
MICROLEAKAGE; PERFORATIONS
AB The purpose of this study was to test the compressive strength of white mineral trioxide aggregate (WMTA) and gray mineral trioxide aggregate (GMTA) when mixed with sterile water or local anesthetic and exposed to an acidic environment. A total of 248 samples of WMTA and GMTA were mixed and placed in phosphate-buffered saline (PBS), at pH 5.0 or 7.4, for a period of 7 or 28 days. When WMTA and GMTA were mixed with local anesthetic, the following were observed: 1) pH 5.0 caused a significant decrease in compressive strength (p < 0.0001); 2) WMTA was significantly stronger than GMTA (p < 0.0001); and 3) more time in PBS (total 28 days) caused a significant decrease in compressive strength (p < 0.001). There were no consistent differences in compressive strength for WMTA or GMTA when mixed with sterile water. Variability of results suggests both types of MTA be mixed with sterile water in acidic and neutral environments.
C1 Wilford Hall USAF Med Ctr, Dept Endodont, Lackland AFB, TX 78236 USA.
Creighton Univ, Sch Dent, Omaha, NE USA.
RP Rutledge, RE (reprint author), Wilford Hall USAF Med Ctr, Dept Endodont, 2450 Pepperrell St, Lackland AFB, TX 78236 USA.
EM james.watts@lackland.af.mil
NR 28
TC 56
Z9 58
U1 0
U2 1
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0099-2399
J9 J ENDODONT
JI J. Endod.
PD AUG
PY 2007
VL 33
IS 8
BP 970
EP 973
DI 10.1016/j.joen.2007.01.024
PG 4
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 196NY
UT WOS:000248490500014
PM 17878085
ER
PT J
AU Paik, SW
Kihm, KD
Lee, SP
Pratt, DM
AF Paik, S. W.
Kihm, K. D.
Lee, S. P.
Pratt, D. M.
TI Spatially and temporally resolved temperature measurements for slow
evaporating sessile drops heated by a microfabricated heater array
SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
LA English
DT Article
DE microfabricated heater array; sessile drops; evaporation; temperature
measurements; tomography
ID CONTACT-ANGLE; POLYMER SURFACES; LIQUID DROPLETS; SOLID-SURFACES; WATER
DROPLET; CAP GEOMETRY; RATES; BEHAVIOR
AB The spatially and temporally resolved evaporation phenomena of a slowly evaporating water droplet are investigated using a microfabricated gold heater array consisting of 32 linear heater elements (100 mu m wide and 15 mm long, each). Each of the gold microheater elements works both as a temperature sensor and as a heater The experiment is performed under a constant voltage mode to examine the spatially resolved temperature history of the droplet contact surface,for a period starting at initial contact with the heater and lasting to the point of complete dryout. The raw data obtained from the linear array have been tomographically deconvolved so that the radial temperature profile can be determined assuming a circular droplet contact surface.
C1 Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN 37996 USA.
Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
Kyonggi Univ, Dept Mech Engn, Suwon, South Korea.
AFRL, VAS, Wright Patterson AFB, OH 45433 USA.
RP Kihm, KD (reprint author), Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN 37996 USA.
EM kkihm@utk.edu
NR 39
TC 4
Z9 4
U1 0
U2 4
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0022-1481
J9 J HEAT TRANS-T ASME
JI J. Heat Transf.-Trans. ASME
PD AUG
PY 2007
VL 129
IS 8
BP 966
EP 976
DI 10.1115/1.2728904
PG 11
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA 207PG
UT WOS:000249262400014
ER
PT J
AU Huang, C
Gregory, JW
Sullivan, JP
AF Huang, Chihyung
Gregory, James W.
Sullivan, John P.
TI Microchannel pressure measurements using molecular sensors
SO JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
LA English
DT Article; Proceedings Paper
CT 21st International Congress on Instrumentation in Aerospace Simulation
Facilities
CY AUG 29-SEP 01, 2005
CL Sendai, JAPAN
SP Tohoku Univ, JAXA, STCB, IEEE, USAF Off Sci Res, Asian Off Aerosp Res & Dev, AIAA, Japan Soc Aeronaut & Space Sci
DE fluid flow measurement; microchannel; microsensors; pressure-sensitive
paint (PSP)
ID GAS MICROFLOWS; FLOW
AB Fluid mechanics on the microscale is an important subject for researchers who are interested in studying microdevices since physical phenomena change from macroscale to microscale. Channel flow is a fundamental topic for fluid mechanics. By using a molecular sensor known as pressure-sensitive paint (PSP), detailed pressure data can be obtained inside the microchannel and at the channel entrance. The achievable spatial resolution of the acquired pressure map can be as high as 5 mu m. PSP measurements are obtained for various pressure ratios from 1.76 to 20, with Knudsen number (Kn) varying from 0.003 to 0.4. Compressibility and rarefaction effects can be seen in the pressure data inside the microchannel and at the channel entrance.
C1 Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47906 USA.
Purdue Univ, Sch Elect Engn, W Lafayette, IN 47906 USA.
USAF Acad, Dept Aeronaut, Colorado Springs, CO 80840 USA.
RP Huang, C (reprint author), Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47906 USA.
EM chihyung@purdue.edu; jim.gregory@alumni.purdue.edu;
john.p.sullivan.1@purdue.edu
RI Huang, Chih-Yung/D-9059-2012; Gregory, James/A-2343-2015
OI Gregory, James/0000-0002-8589-8758
NR 11
TC 27
Z9 27
U1 2
U2 12
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1057-7157
J9 J MICROELECTROMECH S
JI J. Microelectromech. Syst.
PD AUG
PY 2007
VL 16
IS 4
BP 777
EP 785
DI 10.1109/JMEMS.2007.892914
PG 9
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Instruments & Instrumentation; Physics, Applied
SC Engineering; Science & Technology - Other Topics; Instruments &
Instrumentation; Physics
GA 197TF
UT WOS:000248578700001
ER
PT J
AU Nainaparampil, JJ
Eapen, KC
Sanders, JH
Voevodin, AA
AF Nainaparampil, Josekutty J.
Eapen, Kalathil C.
Sanders, Jeffrey H.
Voevodin, Andrey A.
TI Ionic-liquid lubrication of sliding MEMS contacts: Comparison of AFM
liquid cell and device-level tests
SO JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
LA English
DT Article
DE atomic force microscopy (AFM); boundary lubrication; ionic liquid (IL);
microelectromechanical system (MEMS)
ID MOBILE PHASES; PERFORMANCE; MONOLAYERS; STICTION
AB Lubrication of microelectromechanical systems (MEMS) became very critical as the devices became complex and its reliability began to deteriorate. In this paper, ionic liquids (ILs) with low volatility and high environmental stability were investigated as lubricants for sliding MEMS devices. A method that is based on atomic force microscopy (AFM) with a liquid cell was developed to study friction and wear properties of surfaces lubricated with ILs, having a systematic variation in molecular geometry and chemistry. Six-member pyridinium and five-member imidazolium rings are compared as cations in ethyl methyl pyridinium and ethyl methyl imidazolium ethyl sulfate; influence of short and long alkyl chain lengths on lubrication is studied with butyl methyl pyrrolidinium and hexyl methyl pyrrolidinium bis(trifluro methyl sulfonyl) imide. Formation of a surface-screening cation layer was discovered and linked to low friction and wear of IL-lubricated hydrogenated-silicon (H-Si) substrates. Several promising IL lubricants were identified from the AFM study and were tested in real MEMS motor devices. The friction and wear data obtained for these tests showed good correlation with the failure life span of lubricated MEMS motors. This supports a conclusion that the AFM-liquid-cell technique can be used in screening IL lubricants for MEMS devices.
C1 UES Inc, Dayton, OH 45432 USA.
Univ Dayton, Res Inst, Dayton, OH 45433 USA.
Wright Patterson Air Force Base, Air Force Materiel Command Headquarters, Dayton, OH 45433 USA.
Wright Patterson Air Force Base, Air Force Res Lab, Dayton, OH 45433 USA.
RP Nainaparampil, JJ (reprint author), UES Inc, Dayton, OH 45432 USA.
EM jose.nain@wpafb.af.mil
RI Voevodin, Andrey/I-6684-2013
NR 22
TC 35
Z9 35
U1 1
U2 16
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1057-7157
J9 J MICROELECTROMECH S
JI J. Microelectromech. Syst.
PD AUG
PY 2007
VL 16
IS 4
BP 836
EP 843
DI 10.1109/JMEMS.2007.901628
PG 8
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Instruments & Instrumentation; Physics, Applied
SC Engineering; Science & Technology - Other Topics; Instruments &
Instrumentation; Physics
GA 197TF
UT WOS:000248578700008
ER
PT J
AU Raney, NH
Teyhen, DS
Childs, JD
AF Raney, Nicole H.
Teyhen, Deydre S.
Childs, John D.
TI Observed changes in lateral abdominal muscle thickness after spinal
manipulation: A case series using rehabilitative ultrasound imaging
SO JOURNAL OF ORTHOPAEDIC & SPORTS PHYSICAL THERAPY
LA English
DT Article
DE internal oblique; lumbar stabilization; manual therapy; sonography;
transversus abdominis
ID LOW-BACK-PAIN; CLINICAL-PREDICTION RULE; TRANSVERSUS-ABDOMINIS;
ELECTROMYOGRAPHIC RESPONSES; REFLEX RESPONSES; MECHANICAL FORCE;
HEALTHY-SUBJECTS; CONTROLLED-TRIAL; PRIMARY-CARE; DRAWING-IN
AB Study design: Case series.
Background: A clinical prediction rule (CPR) has been developed and validated that accurately identifies a subgroup of patients with low back pain (LBP) likely to benefit from spinal manipulation; however, the mechanism of spinal manipulation remains unclear The purpose of this case series was to describe changes in lateral abdominal muscle thickness using rehabilitative ultrasound imaging (RUSI) immediately following spinal manipulation in a subgroup of patients positive on the rule.
Case descriptions: Data from 9 patients (5 female, 4 male; 18-53 years of age) with a primary complaint of LBP are presented. All patients had symptoms for less than 16 days (range, 3-14 days) and did not have symptoms distal to the knee, satisfying the 2-factor rule for predicting successful outcome from spinal manipulation. The Oswestry Disability Index scores ranged from 8% to 52%. Lateral abdominal muscle thickness was assessed with the patient at-rest and while contracted during an abdominal drawing-in maneuver (ADIM) using RUSI. Measurements were taken before and immediately after spinal manipulation. Patients completed a 15-minute training session of the ADIM prior to assessment, to mitigate the potential for a learning effect to occur.
Outcomes: Based on changes that exceeded the threshold for measurement error, 6 of 9 patients demonstrated an improved ability (11.5%-279%) to increase transversus abdominis (TrA) muscle thickness during the ADIM postmanipulation. Additionally, TrA muscle thickness at-rest postmanipulation decreased for 5 patients (11.5%-25.9%), while at-rest internal oblique muscle thickness decreased for 4 patients (6.4%-12.2%).
Discussion: This case series describes short-term changes in lateral abdominal muscle thickness post spinal manipulation. Although case series have significant limitations, including the fact that no cause-and-effect claims can be made, the decrease in muscle thickness at rest and the greater increase in muscle thickness during the ADIM postmanipulation observed in some of the patients could suggest an improvement in muscular function, Future research is needed to determine if increased muscle thickness is associated with improvements in pain and disability and to further explore neurophysiologic mechanisms of spinal manipulation.
C1 Wilford Hall USAF Med Ctr, San Antonio, TX USA.
US Army Baylor Univ, Doctoral Program Phys Therapy, Army Med Dept Ctr, San Antonio, TX USA.
US Army Baylor Univ, Doctoral Program Phys Therapy, Army Med Sch, San Antonio, TX USA.
Walter Reed Army Med Ctr, Spine Res Ctr, Def Spinal Cord Column & Injury Ctr, Washington, DC 20307 USA.
RP Raney, NH (reprint author), 134 Evans Ave, San Antonio, TX 78209 USA.
EM nicole.raney@lackland.af.mil
NR 52
TC 27
Z9 28
U1 0
U2 2
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 AUG
PY 2007
VL 37
IS 8
BP 472
EP 479
DI 10.2519/jospt.2007.2523
PG 8
WC Orthopedics; Rehabilitation; Sport Sciences
SC Orthopedics; Rehabilitation; Sport Sciences
GA 198SL
UT WOS:000248647700005
PM 17877283
ER
PT J
AU Khurgin, JB
Sun, G
Soref, RA
AF Khurgin, Jacob B.
Sun, Greg
Soref, Richard A.
TI Enhancement of luminescence efficiency using surface plasmon polaritons:
figures of merit
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
ID QUANTUM-WELLS; METAL-FILMS; LIGHT; SPECTROSCOPY; EMISSION; WAVES;
PHOTOLUMINESCENCE; LAYERS; THIN
AB We develop a rigorous theory of the enhancement of spontaneous emission from a light-emitting device via coupling the radiant energy in and out of surface plasmon polaritons (SPPs) on the metal-dielectric interface. We show that while the efficiency of coupling into the SPP mode can be quite high, the radiative efficiency of the SPP itself is relatively low, with a substantial fraction of the energy lost in the metal. Using the GaN/Ag system as an example we obtain easy-to-interpret analytical results that unequivocally indicate that using SPP pays off only for emitters that have medium-to-low luminescence efficiency; thus the SPP applications should be limited to those in sensing and analysis rather than in the development of efficient light sources. (c) 2007 Optical Society of America.
C1 Univ Massachusetts, Dept Phys, Boston, MA 02125 USA.
Johns Hopkins Univ, Dept Elect & Comp Engn, Baltimore, MD 21218 USA.
USAF, Sensors Directorate, Res Lab, Hanscom AFB, MA 01731 USA.
RP Sun, G (reprint author), Univ Massachusetts, Dept Phys, 100 Morrissey Blvd, Boston, MA 02125 USA.
EM greg.sun@umb.edu
RI khurgin, Jacob/A-3278-2010
NR 26
TC 63
Z9 66
U1 1
U2 21
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0740-3224
EI 1520-8540
J9 J OPT SOC AM B
JI J. Opt. Soc. Am. B-Opt. Phys.
PD AUG
PY 2007
VL 24
IS 8
BP 1968
EP 1980
DI 10.1364/JOSAB.24.001968
PG 13
WC Optics
SC Optics
GA 194PL
UT WOS:000248356200040
ER
PT J
AU Welter, J
Sathish, S
Ripberger, E
Lindgren, E
AF Welter, John
Sathish, Shamachary
Ripberger, Erik
Lindgren, Eric
TI Detection of localized heat damage in a polymer matrix composite by a
thermoelastic technique
SO MATERIALS EVALUATION
LA English
DT Article
DE heat damage; composites; thermoelastic
AB Reduction in the strength of polymer matrix composites when exposed to high temperatures is a major concern in the aerospace industry. Loss of mechanical strength can be measured only through established destructive techniques; there is a need for detection and evaluation of heat damage in these composites. Pus paper describes a thermoelastic based, noncontact, nondestructive technique for the detection and testing of heat damage in polymer matrix composites. The efficiency of the material to convert acoustic energy into heat is used as a means to detect and evaluate the heat damage in the material. A panel subjected to local heat damage at several locations is tested using air coupled ultrasonic C-scan and thermoelastic measurements. The results show that the ultrasonic C-scan detects only the major damage. On the other hand, the thermoelastic technique detects both high and lo-to level heat damage in the panel, The efficiency of the conversion of acoustic energy into heat, in undamaged and damaged regions, and its role in detecting damage are discussed.
C1 Met Ceram & NDE Div, Wright Patterson AFB, OH 45433 USA.
Univ Dayton, Inst Res, Struct Integr Div, Dayton, OH 45469 USA.
AFRL, MLSA, Wright Patterson AFB, OH 45433 USA.
AFRL, MLLP, Wright Patterson AFB, OH 45433 USA.
RP Welter, J (reprint author), Met Ceram & NDE Div, 2230 10th St, Wright Patterson AFB, OH 45433 USA.
EM john.welter@wpafb.af.mil
NR 8
TC 3
Z9 3
U1 0
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 AUG
PY 2007
VL 65
IS 8
BP 823
EP 826
PG 4
WC Materials Science, Characterization & Testing
SC Materials Science
GA 197CH
UT WOS:000248530600005
ER
PT J
AU Walker, TB
Altobelli, SA
Caprihan, A
Robergs, RA
AF Walker, Thomas B.
Altobelli, Stephen A.
Caprihan, Arvind
Robergs, Robert A.
TI Failure of Rhodiola rosea to alter skeletal muscle phosphate kinetics in
trained men
SO METABOLISM-CLINICAL AND EXPERIMENTAL
LA English
DT Article
ID MAGNETIC-RESONANCE-SPECTROSCOPY; LOW-DOSE REGIMEN; PHOSPHOCREATINE
KINETICS; EXERCISE PERFORMANCE; ENDURANCE EXERCISE; DOUBLE-BLIND; P-31
NMR; EXTRACT; RECOVERY; STRESS
AB Rhodiola rosea is an herbal supplement purported to improve resistance to stressors and to enhance physical performance, potentially by improving adenosine triphosphate (ATP) turnover. Phosphocreatine (PCr) kinetics serves as a reflection of ATP turnover. The purpose of this investigation was to examine the effect of R rosea ingestion on human skeletal muscle PCr recovery after exhaustive exercise. Twelve resistance-trained men, aged 19 to 39 years, completed incremental forearm wrist flexion exercise to volitional fatigue, once after ingesting 1500 mg R rosea per day for 4 days, and once after ingesting an equivalent placebo dose. During exercise and recovery from exercise, muscle phosphates were examined using phosphorus 31 nuclear magnetic resonance spectroscopy. [PCr] during recovery was fit with a monoexponential function, and the resulting rate constants (k) were compared between groups. Rating of perceived exertion per stage and time to exhaustion were also compared between groups. For R rosea, k = 0.3744 +/- 0.1532, whereas for placebo, k = 0.3956 +/- 0.2238. Although rating of perceived exertion significantly increased within groups as workload increased, it did not differ between conditions, nor did time to exhaustion (R rosea, 10.71 +/- 0.54 minutes; placebo, 10.48 +/- 0.68 minutes). Estimates of [PCr] at time 0, 5, 10, 15, and 20 ininutes of recovery were nearly identical between groups. In summary, there were no significant differences between groups for any of the parameters measured. Based on these results, we conclude that R rosea ingestion does not improve ATP turnover during or immediately after exercise. (c) 2007 Elsevier Inc. All rights reserved.
C1 AF Res Lab, Biosci & Protect Div, Brooks AFB, TX 78235 USA.
New Mexico Resonance, Albuquerque, NM 87131 USA.
Univ New Mexico, Exercise Physiol Labs, Albuquerque, NM 87106 USA.
RP Walker, TB (reprint author), AF Res Lab, Biosci & Protect Div, Brooks AFB, TX 78235 USA.
EM thomas.walker@brooks.af.mil
NR 24
TC 20
Z9 20
U1 0
U2 3
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 0026-0495
J9 METABOLISM
JI Metab.-Clin. Exp.
PD AUG
PY 2007
VL 56
IS 8
BP 1111
EP 1117
DI 10.1016/j.metabol.2007.04.004
PG 7
WC Endocrinology & Metabolism
SC Endocrinology & Metabolism
GA 193YN
UT WOS:000248311200016
PM 17618958
ER
PT J
AU Ret, PL
Brevick, JR
Park, YK
AF Ret, Paul L.
Brevick, Jerald R.
Park, Yong K.
TI Development and evaluation of a novel inclusion seeding methodology for
Ti-6Al-4V castings
SO METALS AND MATERIALS INTERNATIONAL
LA English
DT Article
DE artificial inclusion seeding methodology; Ti-6Al-4V casting; hard alpha
(alpha) inclusion; fatigue test; hot isostatic pressing (HIP)
AB Hard alpha inclusions in titanium (Ti) investment castings are generally known to have detrimental effects on the mechanical properties of these castings. However, actual inclusions are infrequent and occur in random locations in castings. As a result, it is difficult to obtain tensile or fatigue test specimens of titanium castings with inclusions in the gage section. Quantifying the adverse influence of inclusions on the mechanical properties of castings is, therefore, extremely challenging. To address this problem, a novel artificial inclusion seeding methodology was developed to emulate actual Ti investment casting inclusions. Prefabricated inclusions were seeded into machined holes in cast Ti-6Al-4V plates, the holes were back-filled with plugs of the same Ti alloy and were then electron-beam (EB) welded closed. Hot isostatic pressing (HIP) was utilized to incorporate the inclusions fully into the cast titanium material. Finally, the plates were machined to create mechanical test specimens with inclusions centered in the gage region. Test specimens created by means of this novel artificial seeding methodology were evaluated and found to be equivalent to Ti casting specimens containing actual cast-in inclusions.
C1 Catholic Univ Daegu, Sch Mech & Automat Engn, Gyeongsan Si 712702, Gyeongbuk, South Korea.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
Ohio State Univ, Dept Ind Welding & Syst Engn, Columbus, OH 43210 USA.
RP Park, YK (reprint author), Catholic Univ Daegu, Sch Mech & Automat Engn, Geumnak 1-Ri, Gyeongsan Si 712702, Gyeongbuk, South Korea.
EM ykpark@cu.ac.kr
NR 15
TC 1
Z9 1
U1 2
U2 6
PU KOREAN INST METALS MATERIALS
PI SEOUL
PA POSCO CENTER, 4TH FL (EAST WING), 892 DAECHI-4-DONG, KANGNAM-KU, SEOUL
135-777, SOUTH KOREA
SN 1598-9623
J9 MET MATER-INT
JI Met. Mater.-Int.
PD AUG
PY 2007
VL 13
IS 4
BP 285
EP 292
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 208KK
UT WOS:000249318000003
ER
PT J
AU Zhdanov, B
Knize, RJ
AF Zhdanov, Boris
Knize, R. J.
TI Diode-pumped 10 W continuous wave cesium laser
SO OPTICS LETTERS
LA English
DT Article
ID VAPOR LASER
AB An efficient cesium vapor laser pumped with a continuous wave laser diode array has been demonstrated. The linewidth of the pump source was narrowed using the external cavity to match it to the cesium absorption line. The output power of the continuous wave cesium laser was 10 W, which exceeds previous results by more than a factor of 10, and the slope efficiency was 68%. The overall optical efficiency was 62%, which is a factor of 6 higher than previous pulsed laser results for alkali lasers with diode laser array pumping. (C) 2007 Optical Society of America.
C1 USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
RP Zhdanov, B (reprint author), USAF Acad, Dept Phys, 2354 Fairchild Dr,Suite 2A31, Colorado Springs, CO 80840 USA.
EM boris.zhdanov.ctr@usafa.af.mil
NR 9
TC 114
Z9 126
U1 2
U2 14
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 AUG 1
PY 2007
VL 32
IS 15
BP 2167
EP 2169
DI 10.1364/OL.32.002167
PG 3
WC Optics
SC Optics
GA 205BF
UT WOS:000249087200033
PM 17671572
ER
PT J
AU Meyer, TR
King, GB
Gluesenkamp, M
Gord, JR
AF Meyer, Terrence R.
King, Galen B.
Gluesenkamp, Matthew
Gord, James R.
TI Simultaneous high-speed measurement of temperature and
lifetime-corrected OH laser-induced fluorescence in unsteady flames
SO OPTICS LETTERS
LA English
DT Article
ID TIME-SERIES MEASUREMENTS; JET DIFFUSION FLAME; TURBULENT
AB A means of per-forming simultaneous, high-speed measurements of temperature and OH lifetime-corrected laser-induced fluorescence (LIF) for tracking unsteady flames has been developed and demonstrated. The system uses the frequency-doubled and frequency-tripled output beams of an 80 MHz mode-locked Ti:sapphire laser to achieve ultrashort laser pulses (order 2 ps) for Rayleigh-scattering thermometry at 460 nm and lifetime-corrected OH LIF at 306.5 nm, respectively. Simultaneous, high-speed measurements of temperature and OH number density enable studies of flame chemistry, heat release, and flame extinction in unsteady, strained flames where the local fluorescence-quenching environment is unknown. (C) 2007 Optical Society of America.
C1 Iowa State Univ, Dept Engn Mech, Ames, IA 50011 USA.
Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
Prop Directorate, AF Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Meyer, TR (reprint author), Iowa State Univ, Dept Engn Mech, Ames, IA 50011 USA.
EM trm@iastate.edu
RI Meyer, Terrence/F-1556-2011
NR 8
TC 3
Z9 3
U1 0
U2 4
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 AUG 1
PY 2007
VL 32
IS 15
BP 2221
EP 2223
DI 10.1364/OL.32.002221
PG 3
WC Optics
SC Optics
GA 205BF
UT WOS:000249087200051
PM 17671590
ER
PT J
AU Stephenson, JT
Du Bois, JJ
AF Stephenson, Jacob T.
Du Bois, Jeffrey J.
TI Nonoperative management of spontaneous splenic rupture in infectious
mononucleosis: A case report and review of the literature
SO PEDIATRICS
LA English
DT Article
DE mononucleosis; splenic rupture; nonoperative; spleen
ID CONSERVATIVE MANAGEMENT; SPLEEN; INJURY; TRAUMA; SPLENECTOMY; CHILDREN;
SPLENORRHAPHY
AB Spontaneous rupture of the spleen is a rare complication of infectious mononucleosis with no clear consensus on appropriate management. Although management of traumatic splenic rupture has largely moved to nonoperative treatment, splenectomy is still frequently used in dealing with rupture of the diseased spleen. Here we report the case of a 16-year-old boy with splenic rupture secondary to laboratory-confirmed infectious mononucleosis in the absence of trauma. Nonoperative management including ICU admission, serial computed tomography scans, and activity limitation was used successfully. Our experience, along with a review of the literature, leads us to conclude that splenic preservation can be a safe alternative to splenectomy in hemodynamically stable patients with spontaneous splenic rupture. This is of particular importance in the pediatric population, which is at higher risk for postsplenectomy sepsis.
C1 David Grant Med Ctr, Travis AFB, CA 94535 USA.
Kaiser Permanente Hlth Syst, Sacramento, CA USA.
RP Stephenson, JT (reprint author), David Grant Med Ctr, 101 Bodin Circle,MSGS, Travis AFB, CA 94535 USA.
EM jacob.stephenson@travis.af.mil
NR 20
TC 15
Z9 16
U1 0
U2 3
PU AMER ACAD PEDIATRICS
PI ELK GROVE VILLAGE
PA 141 NORTH-WEST POINT BLVD,, ELK GROVE VILLAGE, IL 60007-1098 USA
SN 0031-4005
J9 PEDIATRICS
JI Pediatrics
PD AUG
PY 2007
VL 120
IS 2
BP E432
EP E435
DI 10.1542/peds.2006-3071
PG 4
WC Pediatrics
SC Pediatrics
GA 196SY
UT WOS:000248503500069
PM 17671047
ER
PT J
AU Repperger, DW
Aleva, DL
Thomas, G
Miller, JE
Fullenkamp, SC
AF Repperger, Daniel W.
Aleva, Denise L.
Thomas, Gina
Miller, Janet E.
Fullenkamp, Stephen C.
TI Complexity of visual icons studied via signal detection theory
SO PERCEPTUAL AND MOTOR SKILLS
LA English
DT Article
ID PERCEPTION
AB Two investigations on how humans perceive information from visually rendered complex objects, such as military icons (glyphs) were conducted. A signal detection theory framework was employed to evaluate the sensitivity and specificity of human subject performance. The 6 adults tested showed that as complexity increased, their accuracy in performance decreased. Study 1 showed that complex dimensions (features) could not be assigned arbitrarily. Study 2 developed a rank ordering for features of an iconic object.
C1 USAF, Res Lab, HECV, Wright Patterson AFB, OH 45433 USA.
Gen Dynam Inc, Dayton, OH USA.
RP Repperger, DW (reprint author), USAF, Res Lab, HECV, Wright Patterson AFB, OH 45433 USA.
EM Daniel.repperger@wpafb.af.mil
NR 21
TC 4
Z9 4
U1 0
U2 0
PU PERCEPTUAL MOTOR SKILLS
PI MISSOULA
PA PO BOX 9229, MISSOULA, MT 59807 USA
SN 0031-5125
J9 PERCEPT MOTOR SKILL
JI Percept. Mot. Skills
PD AUG
PY 2007
VL 105
IS 1
BP 287
EP 298
PG 12
WC Psychology, Experimental
SC Psychology
GA 210FE
UT WOS:000249441300036
PM 17918577
ER
PT J
AU Sotirelis, P
Albrecht, JD
AF Sotirelis, P.
Albrecht, J. D.
TI Numerical simulation of photonic crystal defect modes using unstructured
grids and Wannier functions
SO PHYSICAL REVIEW B
LA English
DT Article
ID ENERGY-BANDS; GAP
AB We compute the electromagnetic modes of a photonic crystal point defect by expansion in localized basis functions. The defect modes are expanded using Wannier functions formed from the eigenmodes of the surrounding photonic crystal. The underlying solution to the perfect crystal is based on a real-space solution to Maxwell's equations using the finite element method. The resulting method combines the efficiency and flexibility of using an unstructured grid to discretize the unit cell with the efficiency of the Wannier method, which provides a significant reduction in the number of unknowns (small bases), such as applied to the defect problems with strongly localized modes. We present numerical results for an example defect structure present in a crystal structure that offers convenient validation and comparison to other methods.
C1 High Performance Technol Inc, Wright Patterson AFB, OH 45433 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Sotirelis, P (reprint author), High Performance Technol Inc, Wright Patterson AFB, OH 45433 USA.
NR 28
TC 8
Z9 8
U1 0
U2 1
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 AUG
PY 2007
VL 76
IS 7
AR 075123
DI 10.1103/PhysRevB.76.075123
PG 8
WC Physics, Condensed Matter
SC Physics
GA 206AC
UT WOS:000249155300060
ER
PT J
AU Horie, Y
Case, S
AF Horie, Y.
Case, S.
TI Mesodynamics of shock waves in a polycrystalline metal
SO SHOCK WAVES
LA English
DT Article; Proceedings Paper
CT 3rd International Symposium on Interdisciplinary Shock Wave Research
CY MAR 01-03, 2006
CL Canberra, AUSTRALIA
DE shock wave structure; polycrystals; fluctuations; dispersion-dissipation
ID COMPRESSION; VISCOSITY; ALUMINUM
AB Simulation of the shock compression of polycrystalline alpha-iron at the mesoscale has been carried out using a two-dimensional, quasi-MD code. Grains of about 15 mu m are randomly distributed to simulate the polycrystal. Results show the presence of a particle velocity dispersion comparable to the level observed experimentally. Other unique features include an eddy-like velocity field (meso rotation) and chaotic wave fronts.
C1 USAF, Munit Directorate, Res Lab, Eglin AFB, FL 32542 USA.
AWE, Reading RG7 4PR, Berks, England.
RP Horie, Y (reprint author), USAF, Munit Directorate, Res Lab, 2306 Perimeter Rd, Eglin AFB, FL 32542 USA.
EM yasuyuki.horie@eglin.af.mil
NR 24
TC 0
Z9 0
U1 1
U2 6
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0938-1287
J9 SHOCK WAVES
JI Shock Waves
PD AUG
PY 2007
VL 17
IS 1-2
BP 135
EP 141
DI 10.1007/s00193-007-0090-1
PG 7
WC Mechanics
SC Mechanics
GA 201GI
UT WOS:000248819100012
ER
PT J
AU Levin, GA
Barnes, PN
Bulmer, JS
AF Levin, George A.
Barnes, Paul N.
Bulmer, John S.
TI Current sharing between superconducting film and normal metal
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
ID COATED CONDUCTORS; VOLTAGE DISTRIBUTION; YBCO; TAPES; LAYER
AB A two-dimensional model is introduced that describes DC current sharing between the superconducting and normal metal layers in a configuration typical of YBCO-coated conductors. The model is used to compare the effectiveness of a surround stabilizer and a more conventional one-sided stabilizer. When the resistance of the interface between the superconductor and the stabilizer is low enough, the surround stabilizer is less effective than the one-sided stabilizer in stabilizing a hairline crack in the superconducting film.
C1 AF Res Lab, Propuls Directorate, Wright Patterson AFB, Wright Patterson AFB, OH 45433 USA.
RP Levin, GA (reprint author), AF Res Lab, Propuls Directorate, Wright Patterson AFB, 1950 5th St,Bldg 450, Wright Patterson AFB, OH 45433 USA.
NR 18
TC 12
Z9 12
U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD AUG
PY 2007
VL 20
IS 8
BP 757
EP 764
DI 10.1088/0953-2048/20/8/006
PG 8
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 198XO
UT WOS:000248661000009
ER
PT J
AU Lee, H
Mall, S
Sanders, JH
Sharma, SK
Magaziner, RS
AF Lee, Hyukjae
Mall, Shankar
Sanders, Jeffrey H.
Sharma, Shashi K.
Magaziner, Russell S.
TI Characterization of fretting wear behavior of Cu-Al coating on Ti-6Al-4V
substrate
SO TRIBOLOGY INTERNATIONAL
LA English
DT Article
DE fretting wear; Cu-Al coating; accumulated dissipated energy
ID ENERGY DESCRIPTION; FATIGUE; MECHANISMS
AB Fretting wear and fretting fatigue are two commonly observed material damages when two contacting bodies with a clamping load are under the oscillatory motion. In this study, fretting wear damage of Cu-Al coating on titanium alloy, Ti-6Al-4V substrate was investigated using the dissipated energy approach. Fretting tests were conducted with either no fatigue load or the maximum fatigue load of 300 MPa and stress ratio of 0.1 on the substrate (specimen). In order to investigate the effect of contact load and contact size, different pad sizes and contact loads were used in the tests. Accumulated dissipated energy versus wear volume data showed a linear relationship regardless of fatigue loading condition on specimen with the smaller pad size. However, two separate linear relationships were observed based on the fatigue loading condition with the larger pad size, such that a relatively more dissipated energy was required for a certain amount of wear with fatigue load on the specimen. The linear relationship between the accumulated dissipated energy and wear volume for both pad sizes extended from partial to gross slip regimes and was not affected by the applied contact load. Further, fretting tests with and without fatigue load resulted in different shapes of fretting loops when the larger pad size was used. (c) 2007 Elsevier Ltd. All rights reserved.
C1 Andong Natl Univ, Sch Adv Mat Engn, Andong 760749, Gyungbuk, South Korea.
USAF, Inst Technol, Dept Aeronaut & Astronaut, AFIT,ENY, Wright Patterson AFB, OH 45433 USA.
USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Mall, S (reprint author), Andong Natl Univ, Sch Adv Mat Engn, Andong 760749, Gyungbuk, South Korea.
EM Shankar.Mall@afit.edu
NR 18
TC 12
Z9 13
U1 4
U2 12
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0301-679X
J9 TRIBOL INT
JI Tribol. Int.
PD AUG
PY 2007
VL 40
IS 8
BP 1301
EP 1310
DI 10.1016/j.triboint.2007.02.006
PG 10
WC Engineering, Mechanical
SC Engineering
GA 171QV
UT WOS:000246751400010
ER
PT J
AU Ruggeberg, JU
Gold, MS
Bayas, JM
Blum, MD
Bonhoeffer, J
Friedlander, S
Brito, GD
Heininger, U
Imoukhuede, B
Khamesipour, A
Erlewyn-Lajeunesse, M
Martin, S
Makela, M
Nell, P
Pool, V
Simpson, N
AF Rueggeberg, Jens U.
Gold, Michael S.
Bayas, Jose-Maria
Blum, Michael D.
Bonhoeffer, Jan
Friedlander, Sheila
Brito, Glacus de Souza
Heininger, Ulrich
Imoukhuede, Babatunde
Khamesipour, Ali
Erlewyn-Lajeunesse, Michel
Martin, Susana
Makela, Mika
Nell, Patricia
Pool, Vitali
Simpson, Nick
CA Brighton Collaboration Anaphylaxis
TI Anaphylaxis: Case definition and guidelines for data collection,
analysis, and presentation of immunization safety data
SO VACCINE
LA English
DT Article
DE anaphylaxis; adverse event; immunization; guidelines; case definition
ID MUMPS-RUBELLA VACCINATION; MAST-CELL TRYPTASE; REVISED NOMENCLATURE;
ALLERGIC REACTIONS; ADVERSE REACTIONS; CHILDREN; STATEMENT; MANAGEMENT;
DIAGNOSIS; FEATURES
C1 Univ Childrens Hosp, Basel, Switzerland.
Univ Kinder Klin, Dusseldorf, Germany.
Univ London St Georges Hosp, Sch Med, London, England.
Univ Adelaide, S Australian Immunisat Coordinat Unit, Adelaide, SA 5005, Australia.
Hosp Clin Barcelona, Barcelona, Spain.
Wyeth Res, Collegeville, PA USA.
Univ Calif San Diego, Med Ctr, La Jolla, CA 92093 USA.
Sao Paulo State Univ, Sao Paulo, Brazil.
MRC Fajara, Banjul, Gambia.
Univ Tehran Med Sci, Tehran, Iran.
Univ Bristol, Bristol, Avon, England.
EAP Santa Hortensia, Area 2, Madrid, Spain.
Univ Cent Hosp Helsinki, Helsinki, Finland.
USAF, Sturgeon Bay, WI USA.
Ctr Dis Control & Prevent, Atlanta, GA USA.
John Curtin Sch Med Res, Canberra, ACT, Australia.
RP Heininger, U (reprint author), Univ Childrens Hosp, Basel, Switzerland.
EM secretariat@brightoncollaboration.org
RI Bonhoeffer, Jan/E-5903-2014
NR 39
TC 110
Z9 116
U1 0
U2 1
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0264-410X
J9 VACCINE
JI Vaccine
PD AUG 1
PY 2007
VL 25
IS 31
BP 5675
EP 5684
DI 10.1016/j.vaccine.2007.02.064
PG 10
WC Immunology; Medicine, Research & Experimental
SC Immunology; Research & Experimental Medicine
GA 198QZ
UT WOS:000248643900002
PM 17448577
ER
PT J
AU Beigel, J
Kohl, KS
Khuri-Bulos, N
Bravo, L
Nell, P
Marcy, SM
Warschaw, K
Ong-Lim, A
Poerschke, G
Weston, W
Lindstrom, JA
Stoltman, G
Maurer, T
AF Beigel, John
Kohl, Katrin S.
Khuri-Bulos, Najwa
Bravo, Lulu
Nell, Patricia
Marcy, S. Michael
Warschaw, Karen
Ong-Lim, Anna
Poerschke, Gabriele
Weston, William
Lindstrom, Jill A.
Stoltman, Gillian
Maurer, Toby
CA Brighton Collaboration Rash
TI Rash including mucosal involvement: Case definition and guidelines for
collection, analysis, and presentation of immunization safety data
SO VACCINE
LA English
DT Article
DE rash; mucocutaneous; adverse event; immunization; guidelines; case
definition
ID STATEMENT; QUALITY; TRIALS
C1 Ctr Dis Control & Prevent, Atlanta, GA 30333 USA.
Natl Inst Hlth, Bethesda, MD USA.
Jordan Univ Hosp, Amman, Jordan.
Univ Philippines, Manila, Philippines.
USAF, Sturgeon Bay, WI USA.
Univ So Calif, Panorama, CA USA.
Univ Calif Los Angeles, Sch Med, Kaiser Fdn Hosp, Panorama, CA USA.
Mayo Clin, Scottsdale, AZ USA.
Merck Sharp & Dohme Asia Ltd, Hong Kong, Hong Kong, Peoples R China.
Univ Colorado, Aurora, CO USA.
US FDA, Rockville, MD 20857 USA.
Michigan Dept Commun Hlth, Lansing, MI USA.
Univ Calif San Francisco, San Francisco, CA 94143 USA.
RP Kohl, KS (reprint author), Ctr Dis Control & Prevent, Atlanta, GA 30333 USA.
EM secretariat@brightoncollaboration.org
RI Beigel, John/A-7111-2009
NR 10
TC 10
Z9 10
U1 0
U2 1
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0264-410X
J9 VACCINE
JI Vaccine
PD AUG 1
PY 2007
VL 25
IS 31
BP 5697
EP 5706
DI 10.1016/j.vaccine.2007.02.066
PG 10
WC Immunology; Medicine, Research & Experimental
SC Immunology; Research & Experimental Medicine
GA 198QZ
UT WOS:000248643900004
PM 17403561
ER
PT J
AU Nell, P
Kohl, KS
Graham, PL
LaRussa, PS
Marcy, SM
Fulginiti, VA
Martin, B
Trolin, I
Norton, SA
Neff, JM
AF Nell, Patricia
Kohl, Katrin S.
Graham, Philip L.
LaRussa, Philip S.
Marcy, S. Michael
Fulginiti, Vincent A.
Martin, Bryan
Trolin, Ingrid
Norton, Scott A.
Neff, John M.
CA Brighton Collaboration Vaccinia Vi
TI Eczema vaccinatum as an adverse event following exposure to vaccinia
virus: Case definition & guidelines of data collection, analysis, and
presentation of immunization safety data
SO VACCINE
LA English
DT Article
DE eczema vaccinatum; vaccinia virus; smallpox vaccine; adverse event;
immunization; guidelines; case definition
ID PARTY DIAGNOSTIC-CRITERIA; SMALLPOX VACCINATION; ATOPIC-DERMATITIS;
DARIERS-DISEASE; EPIDEMIOLOGY; BIOTERRORISM; EXPERIENCE; MANAGEMENT;
STATEMENT; QUALITY
C1 Ctr Dis Control & Prevent, Off Chief Sci Officer, Immunizat Safety Off, Atlanta, GA 30333 USA.
USAF, Sturgeon Bay, WI USA.
Columbia Univ, New York Prebyterian Hosp, Coll Phys & Surg, Dept Pediat,Dept Epidemiol, New York, NY USA.
Univ So Calif, Panorama, CA USA.
Univ Calif Los Angeles, Kaiser Fdn Hosp, Sch Med, Panorama, CA USA.
Univ Arizona, Dept Pediat, Tucson, AZ 85721 USA.
Univ Colorado, Denver, CO 80202 USA.
Walter Reed Army Med Ctr, Dept Allergy & Immunol, Washington, DC USA.
Med Prod Agcy, Uppsala, Sweden.
Walter Reed Army Med Ctr, Washington, DC USA.
Childrens Hosp & Reg Med Ctr, Seattle, WA USA.
RP Kohl, KS (reprint author), Ctr Dis Control & Prevent, Off Chief Sci Officer, Immunizat Safety Off, Atlanta, GA 30333 USA.
EM secretariat@brightoncollaboration.org
NR 36
TC 5
Z9 5
U1 0
U2 2
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0264-410X
J9 VACCINE
JI Vaccine
PD AUG 1
PY 2007
VL 25
IS 31
BP 5725
EP 5734
DI 10.1016/j.vaccine.2007.02.085
PG 10
WC Immunology; Medicine, Research & Experimental
SC Immunology; Research & Experimental Medicine
GA 198QZ
UT WOS:000248643900007
PM 17532547
ER
PT J
AU Nell, P
Kohl, KS
Graham, PL
LaRussa, PS
Marcy, SM
Fulginiti, VA
Martin, B
McMahon, A
Norton, SA
Trolin, I
AF Nell, Patricia
Kohl, Katrin S.
Graham, Philip L.
LaRussa, Philip S.
Marcy, S. Michael
Fulginiti, Vincent A.
Martin, Bryan
McMahon, Ann
Norton, Scott A.
Trolin, Ingrid
CA Brighton Collaboration Vaccinia Vi
TI Progressive vaccinia as an adverse event following exposure to vaccinia
virus: Case definition and guidelines of data collection, analysis, and
presentation of immunization safety data
SO VACCINE
LA English
DT Article
DE progressive vaccinia; adverse event; vaccinia virus; smallpox vaccine;
immunization; guidelines; case definition
ID SMALLPOX VACCINATION; UNITED-STATES; COMPLICATIONS; BIOTERRORISM;
QUALITY; TRIALS; RISKS
C1 Ctr Dis Control & Prevent, Off Chief Sci Officer, Immunizat Safety Off, Atlanta, GA 30333 USA.
USAF, Sturgeon Bay, WI USA.
Columbia Univ, New York Presbyterian Hosp, Coll Phys & Surg, Dept Pediat,Dept Epidemiol, New York, NY USA.
Univ So Calif, Panorama, CA USA.
Univ Calif Los Angeles, Kaiser Fdn Hosp, Sch Med, Panorama, CA USA.
Univ Arizona, Dept Pediat, Tucson, AZ 85721 USA.
Univ Colorado, Denver, CO 80202 USA.
Walter Reed Army Med Ctr, Dept Allergy & Immunol, Washington, DC USA.
US FDA, Vaccine Safety Branch, Rockville, MD 20857 USA.
Walter Reed Army Med Ctr, Washington, DC USA.
Med Prod Agcy, Uppsala, Sweden.
RP Kohl, KS (reprint author), Ctr Dis Control & Prevent, Off Chief Sci Officer, Immunizat Safety Off, Atlanta, GA 30333 USA.
EM secretariat@brightoncollaboration.org
NR 24
TC 7
Z9 10
U1 0
U2 3
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0264-410X
J9 VACCINE
JI Vaccine
PD AUG 1
PY 2007
VL 25
IS 31
BP 5735
EP 5744
DI 10.1016/j.vaccine.2007.02.088
PG 10
WC Immunology; Medicine, Research & Experimental
SC Immunology; Research & Experimental Medicine
GA 198QZ
UT WOS:000248643900008
PM 17540484
ER
PT J
AU Beigel, J
Kohl, KS
Brinley, F
Graham, PL
Khuri-Bulos, N
LaRussa, PS
Nell, P
Norton, S
Stoltman, G
Tebaa, A
Warschaw, K
AF Beigel, John
Kohl, Katrin S.
Brinley, Floyd
Graham, Philip L.
Khuri-Bulos, Najwa
LaRussa, Philip S.
Nell, Patricia
Norton, Scott
Stoltman, Gillian
Tebaa, Amina
Warschaw, Karen
CA Brighton Collaboration Vaccinia Vi
TI Generalized vaccinia as an adverse event following exposure to vaccinia
virus: Case definition and guidelines for data collection, analysis, and
presentation of immunization safety data
SO VACCINE
LA English
DT Article
DE generalized vaccinia; adverse event; vaccinia virus; smallpox vaccine;
immunization; guidelines; case definition
ID SMALLPOX VACCINATION; COMPLICATIONS; BIOTERRORISM; STATEMENT; QUALITY;
TRIALS
C1 Ctr Dis Control & Prevent, Off Chief Sci Officer, Immunizat Safety Off, Atlanta, GA 30333 USA.
Natl Inst Hlth, NIG Clin Ctr, Bethesda, MD USA.
Natl Inst Hlth, Natl Inst Neurol Disorders & Stroke, Bethesda, MD USA.
Columbia Univ, New York Presbyterian Hosp, Coll Phys & Surg, Dept Pediat,Dept Epidemiol, New York, NY USA.
Jordan Univ Hosp, Div Pediat Infect Dis, Amman, Jordan.
USAF, Sturgeon Bay, WI USA.
Walter Reed Army Med Ctr, Washington, DC USA.
Michigan Dept Commun Hlth, Div Communicable Dis & Immunizat, Lansing, MI USA.
Ctr Antipoison & Pharmacovigilance, Rabat, Morocco.
Mayo Clin Scottsdale, Dept Dermatol, Scottsdale, AZ USA.
Mayo Clin Scottsdale, Dept Pathol, Scottsdale, AZ USA.
RP Kohl, KS (reprint author), Ctr Dis Control & Prevent, Off Chief Sci Officer, Immunizat Safety Off, Atlanta, GA 30333 USA.
EM secretariat@brightoncollaboration.org
RI Beigel, John/A-7111-2009
NR 21
TC 6
Z9 6
U1 0
U2 3
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0264-410X
J9 VACCINE
JI Vaccine
PD AUG 1
PY 2007
VL 25
IS 31
BP 5745
EP 5753
DI 10.1016/j.vaccine.2007.02.086
PG 9
WC Immunology; Medicine, Research & Experimental
SC Immunology; Research & Experimental Medicine
GA 198QZ
UT WOS:000248643900009
PM 17537552
ER
PT J
AU Lu, Y
Dajani, I
Knize, RJ
AF Lu, Yalin
Dajani, Iyad
Knize, R. J.
TI Ultrafast laser assisted fabrication of ZnO nanorod arrays for photon
detection applications
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Photon-Assisted Synthesis and Processing of Functional
Materials held at the 2006 EMRS Spring Meeting
CY MAY 29-JUN 02, 2006
CL Nice, FRANCE
SP European Mat Res Soc
DE ZnO nanorod array; UV photodetector; pulsed laser deposition; p-n
heterojunction
AB Orderly aligned ZnO nanorod arrays were grown by the ultrafast laser assisted ablation deposition method. These nanorod arrays were further used to make efficient p-n heterojunction photodetector arrays, which have the potential to have nanoscale spatial resolution for imaging, unique incident polarization discrimination capability, and much improved quantum efficiency as well as detection sensitivity. Both front- and back-illumination photodetection schemes were demonstrated by growing those ZnO nanorod arrays on p-type silicon and p-type Zn0.9Mg0.1O-coated Al2O3 (0 0 0 1) substrates, respectively. Typical diode rectification behavior and photosensitivity were observed in both designs through I-V and photocurrent measurements. (c) 2007 Elsevier B.V. All rights reserved.
C1 USAF Acad, Dept Phys, LORC, Colorado Springs, CO 80840 USA.
RP Lu, Y (reprint author), USAF Acad, Dept Phys, LORC, 2354 Fairchild Dr 2A31, Colorado Springs, CO 80840 USA.
EM yalin.lu@usafa.af.mil
NR 12
TC 6
Z9 6
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD JUL 31
PY 2007
VL 253
IS 19
BP 7851
EP 7854
DI 10.1016/j.apsusc.2007.02.091
PG 4
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 204CI
UT WOS:000249020500041
ER
PT J
AU Stone, RS
Anderson, GP
Andrews, E
Dutton, EG
Shettle, EP
AF Stone, R. S.
Anderson, G. P.
Andrews, E.
Dutton, E. G.
Shettle, E. P.
TI Incursions and radiative impact of Asian dust in northern Alaska
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID ARCTIC HAZE; AEROSOL; ALBEDO; CLOUDS; POLLUTION; SURFACE; MODELS
AB The Arctic region is sensitive to incursions of aerosols that affect its radiation balance, directly through interactions with solar and terrestrial radiation and indirectly as cloud condensation nuclei. During spring 2002 dust was transported from the Gobi desert passing over instrumented field sites near Barrow, Alaska, providing the opportunity to measure the dust properties. Empirical determinations of the direct radiative forcing by dust were used to corroborate simulations made using the Moderate Resolution Transmittance radiative transfer code, MODTRAN(TM) 5. During sunlit periods, dust cools the surface while warming those layers in which it resides, increasing atmospheric stability. At night, dust layers tend to cool while the surface warms slightly due to infrared emissions from the dust layer.
C1 Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
NOAA Earth Syst Res Lab, Global Monitoring Div, Boulder, CO USA.
Hanscom AFB, Air Force Res Lab, Space Vehicles Directorate, Hanscom AFB, MA USA.
Naval Res Lab, Remote Sensing Div, Washington, DC USA.
Spectral Sci Inc, Burlington, MA USA.
RP Stone, RS (reprint author), Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
EM robert.stone@noaa.gov
NR 27
TC 29
Z9 30
U1 0
U2 6
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 JUL 31
PY 2007
VL 34
IS 14
AR L14815
DI 10.1029/2007GL029878
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 198AE
UT WOS:000248598600003
ER
PT J
AU Lucht, RP
Kinnius, PJ
Roy, S
Gord, JR
AF Lucht, Robert P.
Kinnius, Paul J.
Roy, Sukesh
Gord, James R.
TI Theory of femtosecond coherent anti-Stokes Raman scattering spectroscopy
of gas-phase transitions
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID TIME-RESOLVED CARS; MICROSCOPY; MOLECULES; THERMOMETRY; DYNAMICS; REGION
AB A theoretical analysis of coherent anti-Stokes Raman scattering (CARS) spectroscopy of gas-phase resonances using femtosecond lasers is performed. The time-dependent density matrix equations for the femtosecond CARS process are formulated and manipulated into a form suitable for solution by direct numerical integration (DNI). The temporal shapes of the pump, Stokes, and probe laser pulses are specified as an input to the DNI calculations. It is assumed that the laser pulse shapes are 70 fs Gaussians and that the pulses are Fourier-transform limited. A single excited electronic level is defined as an effective intermediate level in the Raman process, and transition strengths are adjusted to match the experimental Raman polarizability. The excitation of the Raman coherence is investigated for different Q-branch rotational transitions in the fundamental 2330 cm(-1) band of diatomic nitrogen, assuming that the pump and Stokes pulses are temporally overlapped. The excitation process is shown to be virtually identical for transitions ranging from Q(2) to Q(20). The excitation of the Raman coherences is also very efficient; for laser irradiances of 5x10(17) W/m(2), corresponding approximately to a 100 mu J, 70 fs pulse focused to 50 mu m, approximately 10% of the population of the ground Raman level is pumped to the excited Raman level during the impulsive pump-Stokes excitation, and the magnitude of the induced Raman coherence reaches 40% of its maximum possible value. The theoretical results are compared with the results of experiments where the femtosecond CARS signal is recorded as a function of probe delay with respect to the impulsive pump-Stokes excitation. (c) 2007 American Institute of Physics.
C1 Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
Innovat Sci Solut Inc, Dayton, OH 45440 USA.
USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA.
RP Lucht, RP (reprint author), Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
EM lucht@purdue.edu
NR 40
TC 33
Z9 33
U1 3
U2 19
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 JUL 28
PY 2007
VL 127
IS 4
AR 044316
DI 10.1063/1.2751184
PG 17
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 196ME
UT WOS:000248485900027
PM 17672699
ER
PT J
AU Iacono, ST
Budy, SM
Mabry, JM
Smith, DW
AF Iacono, Scott T.
Budy, Stephen M.
Mabry, Joseph M.
Smith, Dennis W., Jr.
TI Synthesis, characterization, and properties of chain terminated
polyhedral oligomeric silsesquioxane-functionalized perfluorocyclobutyl
aryl ether copolymers
SO POLYMER
LA English
DT Article
DE perfluorocyclobutyl (PFCB) polymer; polyhedral oligomeric
silsesquioxanes; POSS
ID HYBRID COMPOSITES; POLYMERS; FLUOROPOLYMERS; CYCLOPOLYMERIZATION
AB A new class of perfluorocyclobutyl (PFCB) polymers covalently functionalized with polyhedral oligomeric silsesquioxane (POSS) is presented. Three discreetly functionalized POSS monomers possessing thermally reactive trifluorovinyl aryl ether (TFVE) were prepared in good yields. The POSS TFVE monomers were prepared by initial corner-capping of cyclopentyl (-C5H9), iso-butyl (-CH2CH(CH3)(2)), or trifluoropropyl (-CH2CH2CF3) functionalized POSS trisilanols with acetoxyethyltrichlorosilane followed by sequential acid-catalyzed deprotection and coupling with 4-(trifluorovinyloxy)benzoic acid. TFVE-functionalized POSS monomers were thermally polymerized with 4,4'-bis(4-trifluorovinyloxy)biphenyl or 2,2-bis(4-trifluorovinyloxybiphenyl)-1,1,1,3,3,3-hexafluoropropane monomers via a condensate-free, [2+2] step-growth polymerization. The polymerization afforded solution processable PFCB polymers with POSS macromer installed on the polymer chain ends. POSS monomers and their corresponding copolymers were characterized by H-1, C-13, F-19, and Si-29 NNIR, GPC, ATR-FTIR, and elemental combustion analysis. GPC trace analysis showed agreeable number-average molecular weight for various weight percent of cyclopentyl or iso-butyl and trifluoropropyl chain terminated POSS PFCB copolymers. DSC analysis showed the introduction of increasing POSS weight percent in the endcapped PFC13 copolyrners lowers the glass transition temperatures as high as 31 degrees C. On the other hand, the trifluoropropyl POSS endcapped PFC13 polymer glass transition temperature was unaffected when copolymerized with the more fluorinated 2,2-bis(4-trifluorovinyloxybiphenyl)-1,1,1,3,3,3-hexafluoropropane monomer. TGA analysis of POSS PFC13 copolymers showed step-wise decomposition of copolymers resulting from the initial degradation of the POSS cages at 297-355 degrees C in nitrogen and air which was confirmed by pyrolysis coupled with GC-NIS. This initial weight loss was proportional to the weight percent of POSS incorporated into the polymer. The balance of decomposition was observed at 450-563 degrees C in nitrogen and air which is higher than the PFCB homopolymers in most cases. Polymer surface characterization was performed on spin cast transparent, flexible films. These composite films exhibited good POSS dispersion within the matrix PFC13 polymer as was shown by TEM analysis. (c) 2007 Elsevier Ltd. All rights reserved.
C1 Clemson Univ, Adv Mat Res Lab, Dept Chem, Clemson, SC 29634 USA.
Clemson Univ, Adv Mat Res Lab, Ctr Opt Mat Sci & Engn Technol COMSET, Clemson, SC 29634 USA.
AF Res Lab, Propuls Directorate, Edwards AFB, CA 93524 USA.
RP Smith, DW (reprint author), Clemson Univ, Adv Mat Res Lab, Dept Chem, Clemson, SC 29634 USA.
EM dwsmith@clemson.edu
NR 29
TC 27
Z9 28
U1 3
U2 30
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0032-3861
J9 POLYMER
JI Polymer
PD JUL 27
PY 2007
VL 48
IS 16
BP 4637
EP 4645
DI 10.1016/j.polymer.2007.06.022
PG 9
WC Polymer Science
SC Polymer Science
GA 201VJ
UT WOS:000248860400004
ER
PT J
AU Berman, MR
Tsuchiya, T
Gregusova, A
Perera, SA
Bartlett, RJ
AF Berman, Michael R.
Tsuchiya, Takashi
Gregusova, Adriana
Perera, S. Ajith
Bartlett, Rodney J.
TI HNNC radical and its role in the CH+N-2 Reaction
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID POTENTIAL-ENERGY SURFACE; TRANSITION-STATE-THEORY; SPIN-FORBIDDEN
REACTION; TEMPERATURE-DEPENDENCE; RATE-CONSTANT; BASIS-SETS; AB-INITIO;
PRESSURE; N-2; SPECTROSCOPY
AB A previously unreported channel in the spin-allowed reaction path for the CH + N-2 reaction that involves the HNNC radical is presented. The structures and energetics of the HNNC radical and its isomers HCNN and HNCN and the relevant intermediates and transition states that are involved in the proposed mechanism are obtained at the coupled cluster singles and doubles level of theory with noniterative triples correction (CCSD(T)) using a converging series of basis sets aug-cc-pVDZ, aug-cc-pVTZ, and aug-cc-pVQZ. The aug-cc-pVQZ basis is used for all the final single point energy calculations using the CCSD(T)/aug-cc-pVTZ optimized geometries. We find the HNNC radical to have a heat of formation of Delta H-f(0) (HNNC) = 116.5 kcal mol(-1). An assessment of the quality of computed data of the radical species HNCN and HCNN is presented by comparison with the available experimental data. We find that HNNC can convert to HNCN, the highest barrier in this path being 14.5 kcal mol(-1) above the energy of the CH + N-2 reactants. Thus, HNNC can play a role in the high-temperature spin-allowed mechanism for the reaction of CH + N-2 proposed by Moskaleva, Xia, and Lin (Chem. Phys. Lett. 2000, 331, 269).
C1 USAF, Off Sci Res, Arlington, VA 22203 USA.
Univ Florida, Dept Chem & Phys, Quantum Theory Project, Gainesville, FL 32611 USA.
RP Berman, MR (reprint author), USAF, Off Sci Res, 875 N Randolph St, Arlington, VA 22203 USA.
RI Bartlett, Rodney/F-6781-2011; Tsuchiya, Takashi/K-4613-2014
OI Bartlett, Rodney/0000-0003-3865-9639; Tsuchiya,
Takashi/0000-0003-3844-2923
NR 36
TC 15
Z9 15
U1 0
U2 5
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD JUL 26
PY 2007
VL 111
IS 29
BP 6894
EP 6899
DI 10.1021/jp0723618
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 191HE
UT WOS:000248121400039
PM 17608394
ER
PT J
AU Hrozhyk, UA
Serak, SV
Tabiryan, NV
Bunning, TJ
AF Hrozhyk, Uladzimir A.
Serak, Svetlana V.
Tabiryan, Nelson V.
Bunning, Timothy J.
TI Optical tuning of the reflection of cholesterics doped with azobenzene
liquid crystals
SO ADVANCED FUNCTIONAL MATERIALS
LA English
DT Article
ID FILTER; PHASE; PITCH
AB Mixtures of cholesteric liquid crystal doped with high clearing temperature azobenzene nematic liquid crystal are shown to possess large, fast, and reversible dynamic photosensitive features. Selective wavelength shifts approaching 400 nm are reported, and depending on the host cholesteric liquid crystal, both red-shifted and blue-shifted wavelength change can be induced. The photoinduced states of these material systems are showns to be stable for long periods of time upon removal of the radiation source, completely reversible, and dynamically fast. These photounable features are demonstrated using both continuous wave (CW) and nanosecond laser beams. The latters is used to change the selective reflection wavelength from blue to green with a single nanosecond pulse and the ability to write information into these films using these processes are demonstrated.
C1 Beam Engn Adv Measurements Corp, Winter Pk, FL 32789 USA.
AF Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Hrozhyk, UA (reprint author), Beam Engn Adv Measurements Corp, 809 S Orlando Ave,Suite 1, Winter Pk, FL 32789 USA.
EM nelson@beamco.com; timothy.bunning@wpafb.af.mil
NR 24
TC 79
Z9 80
U1 1
U2 22
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1616-301X
J9 ADV FUNCT MATER
JI Adv. Funct. Mater.
PD JUL 23
PY 2007
VL 17
IS 11
BP 1735
EP 1742
DI 10.1002/adfm.200600776
PG 8
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 195AO
UT WOS:000248385100002
ER
PT J
AU Miniewicz, A
Kochalska, A
Mysliwiec, J
Samoc, A
Samoc, M
Grote, JG
AF Miniewicz, Andrzej
Kochalska, Anna
Mysliwiec, Jaroslaw
Samoc, Anna
Samoc, Marek
Grote, James G.
TI Deoxyribonucleic acid-based photochromic material for fast dynamic
holography
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID FUNCTIONALIZED POLYMERS; FILMS; DYE; BIOPOLYMER; MODEL
AB The authors report on a biopolymeric material made of deoxyribonucleic acid (DNA) complexed with the cationic surfactant cetyltrimethyl-ammonium (CTMA) and doped with the photochromic disperse red 1 dye (DR1) for dynamic holographic recording. The molar ratio of the DNA-CTMA to the dye is about 5 : 1. They have found that the photochromic properties of DR1 in the DNA-CTMA matrix are favorably modified in speed of response with respect to conventional polymeric matrices. Dynamic holographic gratings which were inscribed in DR1:DNA-CTMA films are characterized by switching times within a 1-10 ms range. An excellent reversibility of the recording process is reported.
C1 Wroclaw Univ Technol, Inst Phys & Theoret Chem, PL-50370 Wroclaw, Poland.
Australian Natl Univ, Res Sch Phys Sci & Engn, Laser Phys Ctr, Canberra, ACT 0200, Australia.
USAF, Wright Patterson Air Force Base, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Miniewicz, A (reprint author), Wroclaw Univ Technol, Inst Phys & Theoret Chem, PL-50370 Wroclaw, Poland.
EM andrzej.miniewicz@pwr.wroc.pl
RI Samoc, Marek/A-5501-2008; MINIEWICZ, ANDRZEJ/A-6700-2008; Mysliwiec,
Jaroslaw/B-5198-2015;
OI Samoc, Marek/0000-0002-5404-2455; Miniewicz, Andrzej/0000-0003-2470-6246
NR 20
TC 38
Z9 38
U1 1
U2 12
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JUL 23
PY 2007
VL 91
IS 4
AR 041118
DI 10.1063/1.2760169
PG 3
WC Physics, Applied
SC Physics
GA 194LI
UT WOS:000248345500018
ER
PT J
AU Zhuk, HV
Kobryn, PA
Semiatin, SL
AF Zhuk, H. V.
Kobryn, P. A.
Semiatin, S. L.
TI Influence of heating and solidification conditions on the structure and
surface quality of electron-beam melted Ti-6Al-4V ingots
SO JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
LA English
DT Article
DE electron-beam melting; solidification; ingot macrostructure
ID MICROSTRUCTURE; TEXTURE
AB Electron-beam cold-hearth melting is an emerging process used to eliminate high- and low-density inclusions during melt processing and to reduce the number of remelting steps for high quality titanium alloys. In the present work, the effect of ingot heating conditions on the evolution of ingot macrostructure and surface quality during solidification following electron-beam melting of Ti-6AI-4V was established via prototype production trials. Macrostructure observations correlated well with temperature gradients and solidification rates estimated from solidification calculations. These calculations also provided insight into the effect of melting conditions on ingot surface quality and hence associated product yield. (c) 2007 Elsevier B.V. All rights reserved.
C1 EO Paton Elect Welding Inst, UA-03150 Kiev, Ukraine.
USAF, Res Lab, Mat & Mfg Direct, Wright Patterson AFB, OH 45433 USA.
RP Zhuk, HV (reprint author), EO Paton Elect Welding Inst, 11 Bozhenko Str, UA-03150 Kiev, Ukraine.
EM trigubnp@titan-paton.kiev.ua
RI SEMIATIN, SHELDON/E-7264-2017
NR 7
TC 6
Z9 10
U1 7
U2 17
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0924-0136
J9 J MATER PROCESS TECH
JI J. Mater. Process. Technol.
PD JUL 23
PY 2007
VL 190
IS 1-3
BP 387
EP 392
DI 10.1016/j.jmatprotec.2007.03.113
PG 6
WC Engineering, Industrial; Engineering, Manufacturing; Materials Science,
Multidisciplinary
SC Engineering; Materials Science
GA 181FO
UT WOS:000247422600051
ER
PT J
AU Hrozhyk, UA
Serak, SV
Tabiryan, NV
Bunning, TJ
AF Hrozhyk, U. A.
Serak, S. V.
Tabiryan, N. V.
Bunning, T. J.
TI Periodic structures generated by light in chiral liquid crystals
SO OPTICS EXPRESS
LA English
DT Article
ID PITCH; INSTABILITY; CHEMISTRY
AB We discuss materials that reveal fundamental intercoupling of light and chirality in creation of complex structures. These materials are based on cholesteric liquid crystals (CLCs) photosensitized by azobenzene nematics. Transformation of the one-dimensional periodic structure of such CLCs into complex spatial patterns takes place on macroscopic scales, over the whole area of the CLC layer, under the influence of low power radiation including LED, ambient illumination, and sunlight. The obtained structures, with their origin in the strain of the CLC layers caused by trans-cis photoisomerization precede a shift in the bandgap position of the CLCs. The effect is observed both in red-shifting as well as blue-shifting CLCs. (C) 2007 Optical Society of America.
C1 Beam Engn Adv Measurements Corp, Winter Pk, FL 32789 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Tabiryan, NV (reprint author), Beam Engn Adv Measurements Corp, 809 S Orlando Ave,Suite 1, Winter Pk, FL 32789 USA.
EM nelson@beamco.com
NR 25
TC 14
Z9 14
U1 0
U2 5
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD JUL 23
PY 2007
VL 15
IS 15
BP 9273
EP 9280
DI 10.1364/OE.15.009273
PG 8
WC Optics
SC Optics
GA 195EE
UT WOS:000248394500020
PM 19547269
ER
PT J
AU Emamipour, H
Hashisho, Z
Cevallos, D
Rood, MJ
Thurston, DL
Hay, KJ
Kim, BJ
Sullivan, PD
AF Emamipour, Hamidreza
Hashisho, Zaher
Cevallos, Diego
Rood, Mark J.
Thurston, Deborah L.
Hay, K. James
Kim, Byung J.
Sullivan, Patrick D.
TI Steady-state and dynamic desorption of organic vapor from activated
carbon with electrothermal swing adsorption
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID FIBER CLOTH; PERFORMANCE; BIOFILTER; MIXTURES; PERIODS; NONUSE
AB A now method to achieve steady-state and dynamic-tracking desorption of organic compounds from activated carbon was developed and tested with a bench-scale system. Activated carbon fiber cloth (ACFC) was used to adsorb methyl ethyl ketone (MEK) from air streams. Direct electrothermal heating was then used to desorb the vapor to generate select vapor concentrations at 500 ppmv and 5000 ppmv in air. Dynamic-tracking desorption was also achieved with carefully controlled yet variable vapor concentrations between 250 ppmv and 5000 ppmv, while also allowing the flow rate of the carrier gas to change by 100%. These results were also compared to conditions when recovering MEK as a liquid, and using microwaves as the source of energy to regenerate the adsorbent to provide MEK as a vapor or a liquid.
C1 Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA.
Univ Illinois, Ind & Enterprise Syst Engn, Urbana, IL 61801 USA.
Engn Res & Dev Ctr, Construct Engn Res Lab, Champaign, IL 61826 USA.
USAF, Res Lab MLQL, Tyndall AFB, FL 32403 USA.
RP Rood, MJ (reprint author), Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA.
EM mrood@uiuc.edu
NR 18
TC 21
Z9 22
U1 1
U2 13
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 JUL 15
PY 2007
VL 41
IS 14
BP 5063
EP 5069
DI 10.1021/es0703022
PG 7
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 194SC
UT WOS:000248363100040
PM 17711224
ER
PT J
AU Fang, ZQ
Claflin, B
Look, DC
Kerr, LL
Li, XN
AF Fang, Z.-Q.
Claflin, B.
Look, D. C.
Kerr, Lei L.
Li, Xiaonan
TI Electron and hole traps in N-doped ZnO grown on p-type Si by
metalorganic chemical vapor deposition
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ENERGY-LEVELS; THIN-FILMS; DEFECTS; GAN; SEMICONDUCTORS; CRYSTALS
AB Electron and hole traps in N-doped ZnO were investigated using a structure of n(+)-ZnO:Al/i-ZnO/ZnO:N grown on a p-Si substrate by metalorganic chemical vapor deposition (for growth of the ZnO:N layer) and sputtering deposition (for growth of the i-ZnO and n(+)-ZnO:Al layers). Current-voltage and capacitance-voltage characteristics measured at temperatures from 200 to 400 K show that the structure is an abrupt n(+)-p diode with very low leakage currents. By using deep level transient spectroscopy, two hole traps, H3 (0.35 eV) and H4 (0.48 eV), are found in the p-Si substrate, while one electron trap E3 (0.29 eV) and one hole trap H5 (0.9 eV) are observed in the thin ZnO:N layer. Similarities to traps reported in the literature are discussed.
C1 Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
USAF, Mfg Direcrorate, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Fang, ZQ (reprint author), Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
EM zhaoqiang.fang@wright.edu
NR 19
TC 18
Z9 18
U1 0
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUL 15
PY 2007
VL 102
IS 2
AR 023714
DI 10.1063/1.2759181
PG 5
WC Physics, Applied
SC Physics
GA 196MD
UT WOS:000248485100056
ER
PT J
AU Kirawanich, P
Wilson, JR
Yakura, SJ
Islam, NE
AF Kirawanich, Phumin
Wilson, Justin R.
Yakura, Susumu J.
Islam, N. E.
TI A generic topological simulation scheme for studying aperture
electromagnetic field interactions and cable couplings
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
AB A modified electromagnetic topology (EMT) simulation scheme for the interactions of an electromagnetic wave with an aperture and with cables of an electrical system beyond the aperture is described. The modified EMT simulation scheme addresses a concept in dealing with an aperture node of the topological circuitry without having to specify the details of the entire electrical circuitry. The results of the modified EMT simulation scheme have been validated through experiments for aperture/wave interactions and the induced currents on the cable near the aperture. The aperture transfer functions, obtained for both the simulation and experimental cases, have shown the characteristic response similar to that of the high-pass filter with a cutoff frequency. The simulated and measured currents on a cable, placed behind the aperture, resulted in good agreement with each other, providing the good validation of the modified EMT simulation scheme. Under this scheme, any change in topological circuitry can be handled easily in the substructural levels without having to consider an entire system. Consequently, the effects of various types of aperture interactions on the entire system can be reinvestigated via simply remodeling of topological interaction nodes in substructural levels.
C1 Univ Missouri, Dept Elect & Comp Engn, Columbia, MO 65211 USA.
Kirtland AFB, AFRL DEHE, Directed Energy Directorate, AF Res Lab, Kirtland AFB, NM 87117 USA.
RP Islam, NE (reprint author), Univ Missouri, Dept Elect & Comp Engn, Columbia, MO 65211 USA.
EM islamn@missouri.edu
NR 13
TC 2
Z9 2
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUL 15
PY 2007
VL 102
IS 2
AR 024902
DI 10.1063/1.2753708
PG 8
WC Physics, Applied
SC Physics
GA 196MD
UT WOS:000248485100119
ER
PT J
AU Patton, ST
Eapen, KC
Zabinski, JS
Sanders, JH
Voevodin, AA
AF Patton, Steven T.
Eapen, Kalathil C.
Zabinski, Jeffrey S.
Sanders, Jeffrey H.
Voevodin, Andrey A.
TI Lubrication of microelectromechanical systems radio frequency switch
contacts using self-assembled monolayers
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID FLUORIDE-TREATED SI(100); MOBILE PHASES; SURFACE; CARBON; GOLD;
PERFORMANCE; ELECTRONICS; FILMS
AB Contact failures in microelectromechanical systems (MEMS) switches prevent widespread use of MEMS technology for current handling in miniature devices. A self-assembled monolayer (SAM) lubricant was applied to MEMS switch surfaces in this paper as a possible approach for preventing contact failure. Chemical and physical processes on SAM lubricated contact surfaces were investigated at low (10 mu A) and high (1 mA) current using a micro/nanoadhesion apparatus as a switch simulator with in situ monitoring of contact resistance and adhesion force. This was coupled with ex situ analytical analyses of the contacts using x-ray photoelectron spectroscopy (XPS) and micro-Raman techniques. Diphenyl disulfide was chosen as a lubricant due to its thermal stability, enhanced conductivity, and its ability to form a 3.4 angstrom thick SAM on the gold electrode surface. Hot switching experiments were conducted in humid air (45% RH) and dry nitrogen using a MEMS-scale contact force of 200 mu N and 5 Hz frequency. At low current, lubricated contacts failed by growth in both adhesion and contact resistance (R) at about 10(5) cycles. A multi-step degradation mechanism was suggested which includes (1) SAM debonding under electron flow with formation of charged molecular species and dipole molecular structures, (2) migration and trapping of charged molecular species and/or molecular dipoles in the contact zone, (3) decomposition of molecular structures under Joule heating and repeated mechanical impact, and (4) increased R due to carbonaceous film formation that further accelerates thermal decomposition of the SAM. At high current, switch contacts failed immediately due to SAM thermal decomposition. Failure mechanisms and durability were similar in either air or dry nitrogen, indicating a minimum influence of the environment chemistry on the contact processes. This study establishes degradation mechanisms of SAM based lubricants in MEMS electrical contacts and results can be used in designing contact switch lubrication materials. (c) 2007 American Institute of Physics.
C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA.
AF Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Patton, ST (reprint author), Univ Dayton, Res Inst, Dayton, OH 45469 USA.
EM steve.patton@wpafb.af.mil
RI Voevodin, Andrey/I-6684-2013
NR 25
TC 17
Z9 18
U1 0
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUL 15
PY 2007
VL 102
IS 2
AR 024903
DI 10.1063/1.2753594
PG 5
WC Physics, Applied
SC Physics
GA 196MD
UT WOS:000248485100120
ER
PT J
AU Tautz, M
Lai, ST
AF Tautz, Maurice
Lai, Shu T.
TI Charging of fast spinning spheroidal satellites in sunlight
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
AB We present models for a fast spinning, dielectric coated, spheroidal (prolate or oblate) spacecraft charging in sunlight. This work is a generalization of previous treatments of sunlight charging of spherical satellites. The main difference is that the spacecraft geometry can be characterized by a shape parameter that sets the aspect ratio of the spheroids. The models are based on an expansion of the Laplacian potentials external to the spacecraft surface in terms of products of standard Legendre polynomials, describing the polar angle dependence, and modified Legendre functions of the second kind, representing the "radial" behavior. The potential distributions are discussed relative to the corresponding monopole-dipole and monopole-quadrupole configurations in spherical geometry. A Taylor expansion is developed for the potentials when the shape parameter is large (the spherical limit) and expressions are also given in the opposite limit, when the shape parameter goes to zero. As in the spherical case, the potentials produce photosheath barriers which act to block escaping photoelectrons and lead to current balance, allowing sunlight charging to high negative levels. The sheath barrier location and height are calculated numerically, for a wide range of shape parameters. Contour plots are given to depict the potential distributions for sunlight charging of prolate and oblate spheroids at a representative aspect ratio.
C1 Atmospher & Environm Res Radex Inc, Lexington, MA 01730 USA.
AF Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA.
RP Tautz, M (reprint author), Atmospher & Environm Res Radex Inc, Lexington, MA 01730 USA.
NR 7
TC 1
Z9 1
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JUL 15
PY 2007
VL 102
IS 2
AR 024905
DI 10.1063/1.2756076
PG 10
WC Physics, Applied
SC Physics
GA 196MD
UT WOS:000248485100122
ER
PT J
AU Shumelyuk, A
Hryhorashchuk, A
Odoulov, S
Evans, DR
AF Shumelyuk, A.
Hryhorashchuk, A.
Odoulov, S.
Evans, D. R.
TI Transient gain enhancement in photorefractive crystals with two types of
movable charge carrier
SO OPTICS LETTERS
LA English
DT Article
AB Considerable improvement of a transient two-beam coupling gain is reported for Sn2P2S6, a photorefractive crystal that possesses two types of movable charge carrier. A gain enhancement occurs if the phase difference of the interacting beams is abruptly changed to pi. Enhancement is also achieved with periodic phase variations of zero and pi between two discrete states at modulation frequencies lower than the smallest of two reciprocal characteristic times of the space-charge formation. (c) 2007 Optical Society of America.
C1 Natl Acad Sci, Inst Phys, UA-03650 Kiev, Ukraine.
Mat & Mfg Directorate, AF Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Shumelyuk, A (reprint author), Natl Acad Sci, Inst Phys, 46 Sci Ave, UA-03650 Kiev, Ukraine.
EM shumeluk@iop.kiev.ua
NR 8
TC 7
Z9 7
U1 0
U2 0
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 JUL 15
PY 2007
VL 32
IS 14
BP 1959
EP 1961
DI 10.1364/OL.32.001959
PG 3
WC Optics
SC Optics
GA 199AS
UT WOS:000248669200001
PM 17632609
ER
PT J
AU Burke, WJ
Gentile, LC
Huang, CY
AF Burke, William J.
Gentile, Louise C.
Huang, Cheryl Y.
TI Penetration electric fields driving main phase Dst
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID TRANSPOLAR POTENTIAL SATURATION; PARKER-SCKOPKE RELATION; POLAR-CAP
POTENTIALS; MAGNETIC STORMS; SOLAR-WIND; RING CURRENT; DISTURBANCE
DYNAMO; GEOMAGNETIC STORMS; EMPIRICAL-MODELS; HILL MODEL
AB [1] On the basis of three selection criteria we have analyzed the main phase electrodynamics of 17 agnetic storms that occurred between 1999 and mid- 2005: ( 1) the availability of solar wind measurements from the Advanced Composition Explorer ( ACE) satellite, ( 2) a minimum Dst <= - 100 nT, and ( 3) no significant recovery episode between the beginning and maximum epoch of the main phase ( dDst/ dt > 0). We combined the Volland- Stern and Siscoe- Hill models to estimate the intensities of electric fields ( E-VS) in the equatorial plane as the polar cap potential divided by the width of the magnetosphere along the dawn- dusk axis. A survey of provisional Dst and EVS traces over the 5.5 years of interest shows that all sustained excursions of EVS above quiet time levels of 0.22 +/- 0.08 mV/ m were closely tied to the main phases of storms. In every instance, EVS returned to background at or near the beginning of the recovery phase. The data indicate very high correlations between Dst and I-VS = integral E(VS)dt during the main phase of all selected storms.
C1 USAF, Res Lab, Space Vehicles Directorate, Hanscom Air Force Base, Bedford, MA 01731 USA.
Boston Coll, Inst Sci Res, Chestnut Hill, MA 02467 USA.
RP Burke, WJ (reprint author), USAF, Res Lab, Space Vehicles Directorate, Hanscom Air Force Base, 29 Randolph Rd, Bedford, MA 01731 USA.
EM louise.gentile.ctr@hanscom.af.mil
NR 67
TC 22
Z9 22
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD JUL 11
PY 2007
VL 112
IS A7
AR A07208
DI 10.1029/2006JA012137
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 190CP
UT WOS:000248035900001
ER
PT J
AU Bruntt, H
Stello, D
Suarez, JC
Arentoft, T
Bedding, TR
Bouzid, MY
Csubry, Z
Dall, TH
Dind, ZE
Frandsen, S
Gilliland, RL
Jacob, AP
Jensen, HR
Kang, YB
Kim, SL
Kiss, LL
Kjeldsen, H
Koo, JR
Lee, JA
Lee, CU
Nuspl, J
Sterken, C
Szabo, R
AF Bruntt, H.
Stello, D.
Suarez, J. C.
Arentoft, T.
Bedding, T. R.
Bouzid, M. Y.
Csubry, Z.
Dall, T. H.
Dind, Z. E.
Frandsen, S.
Gilliland, R. L.
Jacob, A. P.
Jensen, H. R.
Kang, Y. B.
Kim, S.-L.
Kiss, L. L.
Kjeldsen, H.
Koo, J.-R.
Lee, J.-A.
Lee, C.-U.
Nuspl, J.
Sterken, C.
Szabo, R.
TI Multisite campaign on the open cluster M67 - III. delta Scuti pulsations
in the blue stragglers
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE blue stragglers; stars : individual : EX Cnc; stars : individual; EW
Cnc; delta Scuti; open clusters and associations : individual : M67 (NGC
2682)
ID SOLAR-LIKE OSCILLATIONS; RESOLVED CCD PHOTOMETRY; OLD OPEN CLUSTERS;
STAR FG-VIR; BETA PHOTOMETRY; EFFECTIVE TEMPERATURE; STELLAR
OSCILLATIONS; SURFACE GRAVITY; PROPER MOTIONS; LOG-G
AB We have made an asteroseismic analysis of the variable blue stragglers in the open cluster M67. The data set consists of photometric time-series from eight sites using nine 0.6-2.1 m telescopes with a time-baseline of 43 d. In two stars, EW Cnc and EX Cnc, we detect the highest number of frequencies (41 and 26) detected in delta Scuti stars belonging to a stellar cluster, and EW Cnc has the second highest number of frequencies detected in any delta Scuti star. We have computed a grid of pulsation models that take the effects of rotation into account. The distribution of observed and theoretical frequencies shows that in a wide frequency range a significant fraction of the radial and non-radial low-degree modes are excited to detectable amplitudes. Despite the large number of observed frequencies we cannot constrain the fundamental parameters of the stars. To make progress we need to identify the degrees of some of the modes from either multicolour photometry or spectroscopy.
C1 Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia.
Aarhus Univ, Inst Fys & Astron, DK-8000 Aarhus, Denmark.
USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
CSIC, Inst Astrofis Andalucia, E-3004 Granada, Spain.
UMR, LESIA, Observ Paris, F-8109 Meudon, France.
Aarhus Univ, Danish Asteroseismol Ctr, DK-8000 Aarhus, Denmark.
Vrije Univ Brussels, B-1050 Brussels, Belgium.
Hungarian Acad Sci, Konkoly Observ Budapest, H-1525 Budapest, Hungary.
Gemini Observ, Hilo, HI 96720 USA.
European So Observ, Santiago 19, Chile.
Space Telescope Sci Inst, Baltimore, MD 21218 USA.
Chungnam Natl Univ, Dept Astron & Space Sci, Taejon 305764, South Korea.
Korea Astron & Space Sci Inst, Taejon 305, South Korea.
Univ Florida, Dept Phys, Gainesville, FL 32611 USA.
RP Bruntt, H (reprint author), Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia.
EM bruntt@physics.usyd.edu.au
RI Kiss, Laszlo/A-2539-2008; Suarez, Juan Carlos/C-1015-2009
OI Suarez, Juan Carlos/0000-0003-3649-8384
NR 65
TC 14
Z9 14
U1 0
U2 1
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD JUL 11
PY 2007
VL 378
IS 4
BP 1371
EP 1384
DI 10.1111/j.1365-2966.2007.11865.x
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 184UK
UT WOS:000247667900015
ER
PT J
AU Ichinose, G
Somerville, P
Thio, HK
Graves, R
O'Connell, D
AF Ichinose, Gene
Somerville, Paul
Thio, Hong Kie
Graves, Robert
O'Connell, Dan
TI Rupture process of the 1964 Prince William Sound, Alaska, earthquake
from the combined inversion of seismic, tsunami, and geodetic data
SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
LA English
DT Article
ID SUBDUCTION ZONES; CRUSTAL REFLECTION; GREAT EARTHQUAKES; CHELUNGPU
FAULT; FOCAL MECHANISM; P-WAVES; SLIP; MODEL; DEFORMATION; CASCADIA
AB Four great earthquakes (1952, 1960, 1964, and 2004) have occurred since seismic monitoring began and only two since the installation of a global seismic network. A reexamination of the 1964 (M 9.2) Prince William Sound (PWS), Alaska, earthquake is timely due to the 2004 Sumatra earthquake because it adds constraints to the potential range of source parameters for these types of infrequent events and aids in the ability to predict the ground motions for other subduction zone including Cascadia. We first measured the durations of high-frequency energy radiation from teleseismic P wave codas recorded by short-period World Wide Standardized Seismographic Network (WWSSN SP) instruments to put constraints on the earthquake rupture length. The durations ranged between 250 and 600 s and are shorter in time between azimuths of 190 degrees and 260 degrees. The fault length is estimated to range from 540 to 740 km, rupturing at average speeds of 1.4-2 km/s in a 220 degrees-238 degrees direction. We developed a multiple time window kinematic rupture model for the PWS earthquake from the least squares inversion of teleseismic P waves, tsunami tide gauge records, and geodetic leveling survey observations based on the Green's function technique. We assume three major fault segments for the subduction zone dipping 6-12 degrees based on geologic data. The subfault size on the megathrust was set to 50 x 50 km. The Patton Bay fault (PBF) imbricate thrust was assigned a 60 dip with a subfault size of 20 x 20 km. We estimated a seismic moment of 5.52 x 10 22 N m (M(w)9.12). We identified three areas of major moment release, on the PWS segment near Montague and Middleton Islands extending out to the trench, beneath the Portlock anticline on the Cook segment between 58 degrees N fracture zone and the Kodiak-Bowie seamount chain and finally on the Katmai segment off the coast of Kodiak Island extending to the trench. Our preferred rupture model has a peak slip of 14.9 m along the megathrust and 17.4 m along the PBF. The addition of the PBF resulted in an 8% improvement in residuals and also had a significant effect on the overall slip distribution. Moment release occurred as deep as 50 km depth slab contour near the 350 degrees C isotherm and mantle fore-arc wedge, which is about 10-20 km deeper than previous coupling depths.
C1 URS Grp Inc, Pasadena, CA 91101 USA.
US Bur Reclamat, Denver, CO 80225 USA.
RP Ichinose, G (reprint author), MTC Technol Inc, AFTAC, TTR, 1030 S Hwy A1A, Patrick AFB, FL 32925 USA.
EM gichinose@aftac.gov; doconnell@do.usbr.gov
RI Graves, Robert/B-2401-2013; Ichinose, Gene/I-4420-2016
OI Ichinose, Gene/0000-0003-2081-9825
NR 67
TC 42
Z9 42
U1 2
U2 12
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9313
J9 J GEOPHYS RES-SOL EA
JI J. Geophys. Res.-Solid Earth
PD JUL 10
PY 2007
VL 112
IS B7
AR B07306
DI 10.1029/2006JB004728
PG 21
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 190BU
UT WOS:000248033600005
ER
PT J
AU Samoc, A
Miniewicz, A
Samoc, M
Grote, JG
AF Samoc, Anna
Miniewicz, Andrzej
Samoc, Marek
Grote, James G.
TI Refractive-index anisotropy and optical dispersion in films of
deoxyribonucleic acid
SO JOURNAL OF APPLIED POLYMER SCIENCE
LA English
DT Article
DE biopolymers; films; orientation; refractive index
ID DNA LIQUID-CRYSTALS; SURFACTANT COMPLEX FILMS; PHASE; AZOBENZENE;
BIOPOLYMER; PHOTONICS; MOLECULES
AB We have determined the refractive indices in the directions parallel and perpendicular to the surface plane of films of deoxyribonucleic acid (DNA) and their wavelength dispersion. These parameters are fundamental for understanding the properties of waveguiding structures containing DNA-based photonic materials. The orientation of DNA molecules in films and their optical properties are sensitive to the film fabrication and environmental conditions influencing the structure. Prism coupling measurements show ambient-humidity-related changes in the refractive index, birefringence, and anisotropy of the alignment of the DNA molecules in the films studied. These films were 0.5-5 pm thick, were prepared by both spin coating and casting from aqueous solutions containing 0.1-3 wt % DNA, and were measured in ambient air with relative humidities of 37-58%. The optical properties of the films and the orientation of the DNA molecules are discussed with respect to the mechanism for the formation of the polymer liquid-crystalline phases during film deposition. The dispersion of the refractive indices in films of native DNA has been derived from interference fringes in absorption and reflection spectra in the wavelength range of 350-2700 mn through the fitting of the positions of the fringes with the Sellmeier dispersion formula in combination with the prism coupling data. (C) 2007 Wiley Periodicals, Inc.
C1 Australian Natl Univ, Res Sch Phys Sci & Engn, Laser Phys Ctr, Canberra, ACT 0200, Australia.
Air Force Res Lab, Wright Patterson AFB, OH 45433 USA.
Wroclaw Univ Technol, Inst Phys & Theoret Chem, PL-50370 Wroclaw, Poland.
RP Samoc, A (reprint author), Australian Natl Univ, Res Sch Phys Sci & Engn, Laser Phys Ctr, Canberra, ACT 0200, Australia.
EM anna.samoc@anu.edu.au
RI Samoc, Marek/A-5501-2008; MINIEWICZ, ANDRZEJ/A-6700-2008;
OI Samoc, Marek/0000-0002-5404-2455; Miniewicz, Andrzej/0000-0003-2470-6246
NR 50
TC 48
Z9 48
U1 2
U2 16
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0021-8995
J9 J APPL POLYM SCI
JI J. Appl. Polym. Sci.
PD JUL 5
PY 2007
VL 105
IS 1
BP 236
EP 245
DI 10.1002/app.26082
PG 10
WC Polymer Science
SC Polymer Science
GA 167QK
UT WOS:000246466000026
ER
PT J
AU Moinpour, CM
Darke, AK
Donaldson, GW
Thompson, IM
Langley, C
Ankerst, DP
Patrick, DL
Ware, JE
Ganz, PA
Shumaker, SA
Lippman, SM
Coltman, CA
AF Moinpour, Carol M.
Darke, Amy K.
Donaldson, Gary W.
Thompson, Ian M., Jr.
Langley, Connie
Ankerst, Donna Pauler
Patrick, Donald L.
Ware, John E.
Ganz, Patricia A.
Shumaker, Sally A.
Lippman, Scott M.
Coltman, Charles A., Jr.
TI Longitudinal analysis of sexual function reported by men in the prostate
cancer prevention trial
SO JOURNAL OF THE NATIONAL CANCER INSTITUTE
LA English
DT Article
ID QUALITY-OF-LIFE; ERECTILE DYSFUNCTION; FINASTERIDE; HYPERPLASIA; ENERGY
AB Background The Prostate Cancer Prevention Trial (PCPT) was a randomized, double-blind, placebo-controlled study of the efficacy of finasteride in preventing prostate cancer in 18882 men aged 55 years or older. The PCPT offered an opportunity to prospectively study the effects of finasteride and other covariates on sexual dysfunction.
Methods We assessed sexual dysfunction in 17313 PCPT participants during a 7-year period. A battery of questionnaires assessed sexual dysfunction (Sexual Activity Scale score); age; race; SF-36 Mental Health Inventory-5, Physical Function, and Vitality scores; body mass index; smoking status; and the presence of diabetes and hypertension. Assessments began at month 6 after random assignment and included the Sexual Activity Scale score at randomization as a covariate. Two-sided general t tests, with a cutoff of P value less than .05, were used to determine the statistical significance for mixed model effects with correlated random time slopes and intercepts. The changing impact of covariates on sexual dysfunction was also assessed at 6 months, 3.5 years, and 6.5 years after randomization.
Results Finasteride increased sexual dysfunction only slightly and its impact diminished over time; the increase in the Sexual Activity Scale score relative to placebo of 3.21 points (95% confidence interval [Cl] = 2.83 to 3.59 points; P <.001) at the first assessment decreased to 2.11 points (95% Cl = 1.44 to 2.81 points; P <.001) at the end of study. These Sexual Activity score values were small on a scale of 0-100, the range observed in the study, and in comparison with individual variation. After adjustment for all covariates, mean sexual dysfunction increased in both arms from baseline (6 months after randomization) by 1.26 Sexual Activity points (95% Cl 1.16 to 1.36 points; P <.001) per year, corresponding to a cumulative increase of 8.22 points (95% Cl 7.52 to 8.92 points; P <.001) over the study period.
Conclusions The effect of finasteride on sexual functioning is minimal for most men and should not impact the decision to prescribe or take finasteride.
C1 Fred Hutchinson Canc Res Ctr, Operat Off, SW Oncol Grp, Stat Ctr, Seattle, WA 98109 USA.
Fred Hutchinson Canc Res Ctr, Div Publ Hlth Sci, Seattle, WA 98109 USA.
Univ Utah, Dept Anesthesiol, Salt Lake City, UT 84112 USA.
Univ Texas, Hlth Sci Ctr, Dept Urol, San Antonio, TX 78229 USA.
Wilford Hall USAF Med Ctr, Dept Urol, Lackland AFB, TX USA.
Univ Munich, Inst Med Informat Biometry & Epidemiol, D-80539 Munich, Germany.
Univ Washington, Dept Hlth Serv, Seattle, WA 98195 USA.
QualityMetr Inco, Lincoln, RI USA.
Hlth Assessment Lab, Waltham, MA USA.
Univ Calif Los Angeles, Sch Med, Los Angeles, CA 90024 USA.
Univ Calif Los Angeles, Sch Publ Hlth, Los Angeles, CA 90024 USA.
Univ Calif Los Angeles, Jonsson Comprehens Canc Ctr, Los Angeles, CA 90024 USA.
Wake Forest Univ, Sch Med, Dept Publ Hlth Sci, Winston Salem, NC 27109 USA.
Univ Texas, MD Anderson Canc Ctr, Dept Clin Canc Prevent, Houston, TX 77030 USA.
Univ Texas, MD Anderson Canc Ctr, Dept Thorac Head & Neck Med Oncol, Houston, TX 77030 USA.
SW Oncol Grp, Canc Control & Prevent, Operat Off, San Antonio, TX USA.
RP Moinpour, CM (reprint author), Fred Hutchinson Canc Res Ctr, Operat Off, SW Oncol Grp, Stat Ctr, M3-C102,1100 Fairview Ave N,Box 19024, Seattle, WA 98109 USA.
EM cmoinpou@fhcrc.org
FU NCI NIH HHS [5 U10 CA37429, 2 U10 CA37429-09]
NR 33
TC 43
Z9 44
U1 0
U2 2
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 0027-8874
J9 J NATL CANCER I
JI J. Natl. Cancer Inst.
PD JUL 4
PY 2007
VL 99
IS 13
BP 1025
EP 1035
DI 10.1093/jnci/djm023
PG 11
WC Oncology
SC Oncology
GA 191GF
UT WOS:000248118900010
PM 17596576
ER
PT J
AU Fox, DM
Maupin, PH
Harris, RH
Gilman, JW
Eldred, DV
Katsoulis, D
Trulove, PC
De Long, HC
AF Fox, Douglas M.
Maupin, Paul H.
Harris, Richard H., Jr.
Gilman, Jeffrey W.
Eldred, Donald V.
Katsoulis, Dimi
Trulove, Paul C.
De Long, Hugh C.
TI Use of a polyhedral oligomeric silsesquioxane (POSS)-imidazolium cation
as an organic modifier for montmorillonite
SO LANGMUIR
LA English
DT Article
ID LAYERED-SILICATE NANOCOMPOSITES; POLY(NORBORNYL-POSS) COPOLYMERS;
FLAMMABILITY PROPERTIES; POLYMER NANOCOMPOSITES; CLAY NANOCOMPOSITES;
THERMAL-DEGRADATION; POSS; POLYPROPYLENE; DISPERSION; INTERCALATION
AB Recent studies on organically modified clays (OMCs) have reported enhanced thermal stabilities when using imidazolium-based surfactants over the typical ammonium-based surfactants. Other studies have shown that polyhedral oligomeric silsesquioxanes (POSS) also improve the thermal properties of composites containing these macromers. In an attempt to utilize the beneficial properties of both imidazolium surfactants and POSS macromers, a dual nanocomposite approach to prepare OMCs was used. In this study, the preparation of a new POSS-imidazolium surfactant and its use as an organic modifier for montmorillonite are reported. The purity, solubility, and thermal characteristics of the POSS-imidazolium chloride were evaluated. In addition, several OMCs were prepared by exchanging the Na+ with POSS imidazolium cations equivalent to 100%, 95%, 40%, 20%, and 5% of the cation exchange capacity of the clay. The subsequent OMCs were characterized using thermal analysis techniques (DSC, SDT, and TGA) as well as Si-29 NMR to determine the POSS content in the clay interlayer both before and after thermal oxidation degradation. Results indicate the following: (1) the solvent choice changes the efficiency of the ion-exchange reaction of the clay; (2) self-assembled crystalline POSS domains are present in the clay interlayer; (3) the d-spacing of the exchanged clay is large (3.6 nm), accommodating a bilayer structure of the POSS-imidazolium; and (4) the prepared POSS-imidazolium exchanged clays exhibit higher thermal stabilities than any previously prepared imidazolium or ammonium exchanged montmorillonite.
C1 USN Acad, Dept Chem, Annapolis, MD 21402 USA.
US DOE, Off Basic Energy Sci, Off Sci, Washington, DC 20585 USA.
NIST, Fire Res Div, Bldg & Fire Res Lab, Gaithersburg, MD 20899 USA.
Dow Corning Corp, Midland, MI 48686 USA.
USAF, Off Sci Res, Directorate Chem & Life Sci, Arlington, VA 22203 USA.
RP Fox, DM (reprint author), American Univ, Dept Chem, 4400 Massachusetts Ave,NW, Washington, DC 20016 USA.
EM dfox@american.edu
NR 39
TC 47
Z9 49
U1 1
U2 15
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD JUL 3
PY 2007
VL 23
IS 14
BP 7707
EP 7714
DI 10.1021/la0636863
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 182EF
UT WOS:000247487200048
PM 17555333
ER
PT J
AU Warner, CH
Rachal, J
Breitbach, J
Higgins, M
Warner, C
Bobo, W
AF Warner, Christopher H.
Rachal, James
Breitbach, Jill
Higgins, Michael
Warner, Carolynn
Bobo, William
TI Current perspectives on chief residents in psychiatry
SO ACADEMIC PSYCHIATRY
LA English
DT Article
AB Objective: The authors examine qualitative data from outgoing chief residents in psychiatry from the 2004-2005 academic year to 1) determine common characteristics between programs, 2) examine the residents' perspectives on their experiences, and 3) determine their common leadership qualities.
Method: The authors sent out self-report surveys via e-mail to 89 outgoing chief residents who attended the APA/Lilly Chief Resident Executive Leadership Program.
Results: Fifty-three (60%) chief residents responded. Although most chief residents are senior residents, over 20% are in their third postgraduate year Two-thirds of programs have more than one chief resident each year. Most chief residents believe that their "Participating" leadership style, existing leadership skills, and interpersonal skills contributed to their overall positive experiences.
Conclusions: Successfully performing duties as a chief resident entails functioning in a variety of roles and demands attention to leadership qualities of the individual. Developing existing leadership skills, clarifying expectations, and providing mentorship to chief residents will ensure successful transition into practice, and the advancement of the field of psychiatry.
C1 Third Infantry Div, Ft Stewart, GA USA.
Med Coll Wisconsin, Dept Psychiat & Behav Med, Milwaukee, WI 53226 USA.
Ehrling Berquist Air Force Hosp, Dept Psychiat, Offutt AFB, NE USA.
Womack army Med Ctr, Dept Psychol, Ft Bragg, NC USA.
436th Med Grp, Dover AFB, DE USA.
Winn Army Community Hosp, Ft Stewart, GA USA.
Uniformed Serv Univ Hlth Sci, Dept Psychiat, Bethesda, MD 20814 USA.
RP Warner, CH (reprint author), Winn Army Hosp, Dept Psychiat, 373 Steeple Chase Lane, Richmond Hill, GA 31324 USA.
EM christopher.h.wamer@us.army.mil
NR 10
TC 5
Z9 5
U1 0
U2 1
PU AMER PSYCHIATRIC PUBLISHING, INC
PI ARLINGTON
PA 1000 WILSON BOULEVARD, STE 1825, ARLINGTON, VA 22209-3901 USA
SN 1042-9670
J9 ACAD PSYCHIATR
JI Acad. Psych.
PD JUL-AUG
PY 2007
VL 31
IS 4
BP 270
EP 276
DI 10.1176/appi.ap.31.4.270
PG 7
WC Education & Educational Research; Psychiatry
SC Education & Educational Research; Psychiatry
GA 190HI
UT WOS:000248049500005
PM 17626188
ER
PT J
AU Warner, CH
Morganstein, J
Rachal, J
Lacy, T
AF Warner, Christopher H.
Morganstein, Joshua
Rachal, James
Lacy, Timothy
TI Perceptions and practices of graduates of combined family
medicine-psychiatry residency programs: A nationwide survey
SO ACADEMIC PSYCHIATRY
LA English
DT Article
ID PRIMARY-CARE; INTERNAL-MEDICINE; DEPRESSION; DISORDERS; PRACTITIONERS;
MANAGEMENT; PHYSICIANS; DIAGNOSIS; ABILITY
AB Objective: The authors evaluate the current practices and perceptions of graduates of combined family medicine-psychiatry residency programs in the following areas: preparation for practice, boundary formation, and integration of skills sets.
Method: The authors conducted an electronic cross-sectional survey of all nationwide combined family medicine-psychiatry training graduates in the spring of 2005.
Results: Twenty-seven (62.8%) graduates participated. Nearly 30% worked in positions designed specifically for combined trained physicians,though only 11.1% participated in fully integrated practice. The mean time spent practicing psychiatry and family medicine is 70% and 16%, respectively.
Conclusions: Combined trained graduates felt well prepared for practice in both specialties but somewhat less comfortable providing integrated care. Most are in positions that underutilize their ability to integrate family medicine and psychiatry in one practice. Contributing factors may include limited preparation for integration during residency training and lack of integrated job opportunities. Enhancing combined residents' training in the provision of integrated services may optimize their utilization.
C1 Third Infantry Div, Ft Stewart, GA USA.
Med Coll Wisconsin, Dept Psychiat & Behav Med, Milwaukee, WI 53226 USA.
Malcoln Grow Med Ctr, Dept Psychiat, Andrews AFB, MD USA.
Ehrling Berquist Hosp, Dept Psychiat, Offutt AFB, NE USA.
RP Warner, CH (reprint author), Winn Army Hosp, Dept Psychiat, 373 Steeple Chase Lane, Richmond Hill, GA 31324 USA.
EM christopher.h.warner@us.army.mil
OI Morganstein, Joshua/0000-0002-6514-4350
NR 26
TC 5
Z9 5
U1 0
U2 2
PU AMER PSYCHIATRIC PUBLISHING, INC
PI ARLINGTON
PA 1000 WILSON BOULEVARD, STE 1825, ARLINGTON, VA 22209-3901 USA
SN 1042-9670
J9 ACAD PSYCHIATR
JI Acad. Psych.
PD JUL-AUG
PY 2007
VL 31
IS 4
BP 297
EP 303
DI 10.1176/appi.ap.31.4.297
PG 7
WC Education & Educational Research; Psychiatry
SC Education & Educational Research; Psychiatry
GA 190HI
UT WOS:000248049500009
PM 17626192
ER
PT J
AU Torvik, PJ
Runyon, BD
AF Torvik, Peter J.
Runyon, Brian D.
TI Estimating the loss factors of plates with constrained layer damping
treatments
SO AIAA JOURNAL
LA English
DT Article; Proceedings Paper
CT AIAA/ASME/ASCE/AHS/ASC 47th Structures, Structural Dynamics, and
Materials Conference
CY MAY 01-04, 2006
CL Newport, RI
SP AIAA, ASME, ASCE, AHS, ASC
ID BOUNDARY-CONDITIONS; VIBRATION; BEAMS
AB A method is developed and validated for the determination of approximate values of loss factors and frequencies of rectangular plates with general boundary conditions, fully covered on one side with a constrained layer damping treatment. The method, referred to as the method of equivalent lengths, is an extension for use on plates of the commonly used practice, through eigenvalue replacement, of applying the Ross, Ungar, and Kerwin analysis to the prediction of loss factors for beams with other than simply supported ends. Application of the method requires only that the modulus, thickness, and density of the substrate, constraining layer, and shear layer be known, as well as either the eigenvalue or natural frequency for the plate of aspect ratio and boundary condition to which the constrained layer treatment is to be applied. Predictions of the method are compared with results obtained by finite element methods for plates with various boundary conditions, including those with zero, one, two, three, and four free edges.
C1 USAF, Inst Technol, Nagoya, Aichi 4538511, Japan.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Torvik, PJ (reprint author), USAF, Inst Technol, 1866 Winchester Rd, Nagoya, Aichi 4538511, Japan.
NR 22
TC 4
Z9 4
U1 0
U2 0
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
J9 AIAA J
JI AIAA J.
PD JUL
PY 2007
VL 45
IS 7
BP 1492
EP 1500
DI 10.2514/1.24505
PG 9
WC Engineering, Aerospace
SC Engineering
GA 190QW
UT WOS:000248075000006
ER
PT J
AU Gordeyev, S
Post, ML
McLaughlin, T
Ceniceros, J
Jumper, EJ
AF Gordeyev, Stanislav
Post, Martiqua L.
McLaughlin, Thomas
Ceniceros, Juan
Jumper, Eric J.
TI Aero-optical environment around a conformal-window turret
SO AIAA JOURNAL
LA English
DT Article; Proceedings Paper
CT AIAA 37th Plasmadynamics and Lasers Conference
CY JUN 05-08, 2006
CL San Francisco, CA
SP AIAA
AB This paper presents the aero-optical environment around a generic conformal-window turret formed from a hemisphere on a short cylindrical base. A suite of optical instruments consisting of a Malley probe, a conventional two-dimensional Shack-Hartmann wave-front sensor, and a new high-bandwidth, lower-resolution Hartmann wave-front sensor were used to measure the aberrations on the wave front of a laser beam emanating from the turret at various angles in both the forward and aft direction in the turret's zenith plane. The measurements were made over a range of Mach numbers from 0.35 to 0.45. Complementary steady- and unsteady-pressure measurements over a slightly larger range of Mach numbers were also made, along with a surface-flow-visualization study of the complex flowfield over and around the turret. The use of the suite of sensors allowed for the recognition and separation of the aberrating optical environment into components associated with stationary disturbances and convecting disturbances at the frequency of the turret's separated wake and at order-of-magnitude-higher frequencies associated with structures that form in the separated shear layers, respectively. The optical data separated in this way are valuable because of the implications for adaptive optics.
C1 Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA.
USAF Acad, Dept Aeronaut, Colorado Springs, CO 80840 USA.
Boeing Co, Joint Technol Off, Albuquerque, NM 87109 USA.
Univ Notre Dame, Dept Aeronaut & Mech Engn, Notre Dame, IN 46556 USA.
RP Gordeyev, S (reprint author), Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA.
RI Gordeyev, Stanislav/A-7062-2013; Jumper, Eric/A-9856-2013
NR 9
TC 13
Z9 14
U1 0
U2 7
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
J9 AIAA J
JI AIAA J.
PD JUL
PY 2007
VL 45
IS 7
BP 1514
EP 1524
DI 10.2514/1.26380
PG 11
WC Engineering, Aerospace
SC Engineering
GA 190QW
UT WOS:000248075000008
ER
PT J
AU Porter, CO
Baughn, JW
McLaughlin, TE
Enloe, CL
Font, GI
AF Porter, C. O.
Baughn, J. W.
McLaughlin, T. E.
Enloe, C. L.
Font, G. I.
TI Plasma actuator force measurements
SO AIAA JOURNAL
LA English
DT Article; Proceedings Paper
CT AIAA 44th Aerospace Sciences Meeting and Exhibit
CY JAN 09-12, 2006
CL Reno, NV
SP AIAA
ID MECHANISMS; RESPONSES
AB In previous work at the U.S. Air Force Academy, the phenomenology and behavior of the aerodynamic plasma actuator, a dielectric barrier discharge plasma, was investigated. To provide insight into the phenomenology associated with the transfer of momentum to air by a plasma actuator, the velocity distributions upstream and downstream of a plasma actuator with an induced boundary layer were measured using freestream velocities of approximately 4.6 and 6.8 m/s for a range of frequencies (5-20 kHz) and voltages (5-10-kV amplitude). The body forces on the air were calculated using a control volume momentum balance. In a second experiment, time-averaged results were also obtained by measuring the reaction force using a pendulum. A third experiment uses an accelerometer to gain insight into the time-dependent forces or, more specifically, the direction of the forces. The results show that the body force acts within the first 4 mm above the surface of the actuator (within the boundary layer). For a constant peak-to-peak voltage, the body force is proportional to frequency, producing a constant impulse per cycle, and the energy dissipation per cycle and efficiency are independent of frequency. The time-dependent measurements support the theory that the body force of the actuator consists of one large push followed by one small pull during each cycle.
C1 USAF Acad, Dept Aeronaut, Colorado Springs, CO 80840 USA.
Univ Calif Davis, Dept Mech & Aeronaut Engn, Davis, CA 95616 USA.
USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA.
RP Porter, CO (reprint author), Univ Colorado, Dept Mech Engn, Colorado Springs, CO 80933 USA.
NR 22
TC 33
Z9 40
U1 0
U2 2
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
J9 AIAA J
JI AIAA J.
PD JUL
PY 2007
VL 45
IS 7
BP 1562
EP 1570
DI 10.2514/1.24497
PG 9
WC Engineering, Aerospace
SC Engineering
GA 190QW
UT WOS:000248075000013
ER
PT J
AU Calabria, CW
Dice, JP
Hagan, LL
AF Calabria, Christopher W.
Dice, John P.
Hagan, Larry L.
TI Prevalence of positive skin test responses to 53 allergens in patients
with rhinitis symptoms
SO ALLERGY AND ASTHMA PROCEEDINGS
LA English
DT Article; Proceedings Paper
CT 62nd Annual Meeting of the
American-Academy-of-Allergy-Asthma-and-Immunology
CY MAR 03-07, 2006
CL Miami Beach, FL
SP Amer Acad Allergy, Asthma & Immunol
DE age; allergens; allergic rhinitis; military; natural history;
prevalence; reactivity; retrospective; rhinitis; skin test
ID NUTRITION EXAMINATION SURVEY; INNER-CITY HOMES; TEST REACTIVITY;
POPULATION-SAMPLE; NATIONAL-HEALTH; MOUSE ALLERGEN; SENSITIZATION;
ASTHMA; AEROALLERGENS; MORBIDITY
AB Prior studies looking at allergic sensitization have focused on narrow age ranges or small numbers of allergens. This study is the first to examine the prevalence of positive skin test responses in a symptomatic military population with a wide age range of patients and large number of allergens. This study was a retrospective analysis of our skin test database. We included 1137 patients aged 4-79 years old who underwent our standard skin-prick testing panel of 53 aeroallergens and 2 controls using the Quintest device (Hollister-Stier, Spokane, WA). Results indicated that 81.6% of patients had at least one positive skin test. Rates of atopy were similar between male and female patients; 9.2% of patients were monosensitized. The average number of positive skin tests peaked in the 10- to 19-year age group at 13.1 and declined in older age groups. The prevalence of atopy peaked in the 30- to 39-year age group at 85.5% and decreased in older age groups. The most common allergens were grasses, mountain cedar, and dust mites. Sensitization rates for many underreported allergens, including mouse and rat, are presented. This study shows that 81.6% of patients in a symptomatic military population were atopic. These rates are high, even when compared with other allergic populations. Atopy peaked in young adulthood and declined in older age groups. Grasses, mountain cedar, and dust mites were the most common allergens. Although performed in a military population, these results should be applicable to many allergy practices.
C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
RP Calabria, CW (reprint author), Wilford Hall USAF Med Ctr, 2200 Bergquist Dr,Suite 1,759 MDOS MMIA Allergy, Lackland AFB, TX 78236 USA.
EM christopher.calabria@lackland.af.mil
NR 18
TC 12
Z9 16
U1 0
U2 0
PU OCEAN SIDE PUBLICATIONS INC
PI PROVIDENCE
PA 95 PITMAN ST, PROVIDENCE, RI 02906 USA
SN 1088-5412
J9 ALLERGY ASTHMA PROC
JI Allergy Asthma Proc.
PD JUL-AUG
PY 2007
VL 28
IS 4
BP 442
EP 448
DI 10.2500/aap.2007.28.3016
PG 7
WC Allergy
SC Allergy
GA 204DV
UT WOS:000249024700008
PM 17883912
ER
PT J
AU Forester, JP
Johnson, TL
Arora, R
Quinn, JM
AF Forester, Joseph P.
Johnson, Thomas L.
Arora, Rajiv
Quinn, James M.
TI Systemic reaction rates to field stings among imported fire
ant-sensitive patients receiving > 3 years of immunotherapy versus < 3
years of immunotherapy
SO ALLERGY AND ASTHMA PROCEEDINGS
LA English
DT Article
DE allergen; desensitization; duration of immunotherapy; field sting;
hypersensitivity reactions; immunotherapy; imported fire ant; long-term
protection; venom; whole body extract
ID STOPPING VENOM IMMUNOTHERAPY; SOLENOPSIS-INVICTA; HYPERSENSITIVITY;
DISCONTINUATION; EFFICACY
AB As imported fire ants WAS) expand their range, hypersensitivity reactions to their stings are becoming a significant cause of morbidity and mortality in the United States. Currently, IFAs whole body extract (WBE) immunotherapy is the mainstay of treatment for IFA hypersensitivity but the optimal duration of treatment is unknown. A questionnaire was administered to patients diagnosed with IFA venom hypersensitivity based on history and the presence of IFA venom-specific IgE who had been offered immunotherapy. The patients were grouped into those who received >= 3 years of immunotherapy and those who received < 3 years of immunotherapy. Forty of the 272 patients initially identified were successfully contacted (14%) with 6 patients being excluded. Of these patients, 19 reported having received <3 years of IFA immunotherapy (reduced course) and 15 stated they had been given > 3 years of immunothempy (complete course). Subsequent field stings were reported by 18 (95%) of the reduced course groups and 14 (93%) of the complete course group with 1 person from each group (6 and 7%, respectively) experiencing a systemic reaction. There were no significant differences between the two groups in the number of patients with subsequent field stings or systemic reactions after subsequent IFA stings. Less than 3 years of IFA immunotherapy may offer long-term protection against IFA hypersensitivity reactions although additional studies with more subjects and controls are necessary before definitive conclusions may be made.
C1 USAF Acad, Dept Pediat, Colorado Springs, CO 80840 USA.
Wilford Hall USAF Med Ctr, Dept Allergy & Immunol, Lackland AFB, TX 78236 USA.
RP Forester, JP (reprint author), USAF Acad, Dept Pediat, 4102 Pinion Dr, Colorado Springs, CO 80840 USA.
EM joseph.forester@usafa.af.mil
NR 18
TC 12
Z9 12
U1 0
U2 0
PU OCEAN SIDE PUBLICATIONS INC
PI PROVIDENCE
PA 95 PITMAN ST, PROVIDENCE, RI 02906 USA
SN 1088-5412
J9 ALLERGY ASTHMA PROC
JI Allergy Asthma Proc.
PD JUL-AUG
PY 2007
VL 28
IS 4
BP 485
EP 488
DI 10.2500/aap.2007.28.3021
PG 4
WC Allergy
SC Allergy
GA 204DV
UT WOS:000249024700016
PM 17883920
ER
PT J
AU Wheeler, DT
Bristow, RE
Kurman, RJ
AF Wheeler, Darren T.
Bristow, Robert E.
Kurman, Robert J.
TI Histologic alterations in endometrial hyperplasia and
well-differentiated carcinoma treated with progestins
SO AMERICAN JOURNAL OF SURGICAL PATHOLOGY
LA English
DT Article
DE endometrial hyperplasia; endometrial carcinoma; endometrioid carcinoma;
progestins; progestin therapy; classification of endometrial hyperplasia
ID WOMEN 40 YEARS; THERAPY; AGE; ADENOCARCINOMA; CANCER; PROGESTERONE;
YOUNGER; LESIONS
AB The treatment of complex atypical hyperplasia (CAH) and well-differentiated endometrioid carcinoma (WDC) by progestin therapy has been shown to be a safe alternative to hysterectomy. Accurate assessment for regressive changes induced by the progestins is critical to successful treatment. However, there are few studies detailing the histopathologic changes associated with progestin therapy. A total of 44 patients with CAH or WDC, treated with oral progestins or a progesterone or levonorgestrel-releasing intrauterine device, were followed by endometrial biopsy and/or curettage at 3 to 6 month intervals for a maximum of 25 months. The pretreatment and posttreatment endometrial samples were evaluated for response to treatment and for the histologic features of gland-to-stroma ratio, architectural abnormalities [back-to-back glands and confluency (cribriform and/or papillary patterns)], glandular cellularity, mitotic activity, cytologic atypia, and cytoplasmic changes. Histologic changes seen in progestin-treated endometria included a decreased gland-to-stroma ratio, decreased glandular cellularity, decreased to absent mitotic activity, loss of cytologic atypia, and a variety of cytoplasmic changes including mucinous, secretory, squamous, and eosinophilic metaplasia. Architectural changes tended to resolve later in the course of treatment. Some architectural abnormalities, specifically cribriform and papillary patterns, were induced by progestins mimicking progression. Twelve (67%) of IS women with CAH had complete resolution, 2 (11%) regressed to complex hyperplasia without atypia, and 4 (22%) demonstrated persistent disease over a median follow-up period of I I months. Eleven (42%) of 26 women with WDC had complete resolution and 15 (58%) had persistent disease over a median follow-up period of 12 months. Three instances of disease progression occurred, presumably only after discontinuing progestin treatment. Only persistent architectural abnormalities and/or cytologic atypia in the 7 to 9-month biopsies were predictive of treatment failure, with a trend for cytologic atypia to be the most powerful predictor. These findings indicate that progestin therapy should be continued for no less than 6 months to accurately assess treatment response. A modified classification for progestin-treated lesions of the endometrium is proposed.
C1 USAF, Dept Gynecol & Breast Pathol, Washington, DC USA.
Johns Hopkins Med Inst, Dept Gynecol & Obstet, Baltimore, MD USA.
Johns Hopkins Med Inst, Dept Pathol, Baltimore, MD USA.
RP Wheeler, DT (reprint author), Quest Diagnost Inc, 4230 Byrnham Ave, Las Vegas, NV 89119 USA.
EM darren.t.wheeler@questdiagnostics.com
NR 25
TC 69
Z9 73
U1 1
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0147-5185
J9 AM J SURG PATHOL
JI Am. J. Surg. Pathol.
PD JUL
PY 2007
VL 31
IS 7
BP 988
EP 998
DI 10.1097/PAS.0b013e31802d68ce
PG 11
WC Pathology; Surgery
SC Pathology; Surgery
GA 183LG
UT WOS:000247573700002
PM 17592264
ER
PT J
AU Fetsch, JF
Laskin, WB
Haffinan, JR
Lupton, GP
Miettinen, M
AF Fetsch, John F.
Laskin, Williani. B.
Haffinan, Janies R.
Lupton, George P.
Miettinen, Markku
TI Neurothekeoma: An analysis of 178 tumors with detailed
immunohistochemical data and long-term patient follow-up information
SO AMERICAN JOURNAL OF SURGICAL PATHOLOGY
LA English
DT Article
DE cutaneous myxoma; immunohistochemistry; nerve sheath myxonia;
neurofibroma; peripheral nerve sheath tumor; plexiform fibrohistiocytic
tumor; soft tissue tumor; superficial angiomyxoma
ID NERVE-SHEATH MYXOMA; PLEXIFORM FIBROHISTIOCYTIC TUMOR; MICROPHTHALMIA
TRANSCRIPTION FACTOR; CELLULAR NEUROTHEKEOMA; CLINICOPATHOLOGICAL
ANALYSIS; SUPERFICIAL ANGIOMYXOMA; ENDOCRINE OVERACTIVITY; EPITHELIOID
VARIANT; SPOTTY PIGMENTATION; S-100 PROTEIN
AB This report describes the clinicopathologic findings in 176 patients who presented with 178 tumors currently referred to as neurothekeomas. Our study group included 64 males and 112 females, ranging front 20 months to 85 years old at the time of their first surgical procedure (median age: 17 y). Twenty-four percent of patients were :! 10 years of age and only 20% of patients were 30 years of age at initial diagnosis. The patients typically presented with a solitary, superficial, slow-growing, and relatively asymptomatic mass in the 0.3 to 2.0cm size range. One patient had multiple tumors. More than 75% of the lesions involved the head (n = 63), upper extremities (n 44), and shoulder girdle (n = 27) regions. The tumors were evident a few weeks to 4 years (median duration: approximate to 71 mo) before surgical resection was Sought. Histologically, the lesions involved the dermis and/or subcutis, and they formed multinodular masses with varying amounts of myxoid matrix and peripheral fibrosis. On the basis of the amount of myxoid matrix, the tumors were subclassified as cellular (n 63), mixed (n = 67), or myxoid (n = 48). All cases had spindled and epithelioid mononuclear neoplastic cells with relatively abundant cytoplasm and indistinct cell borders. The majority of cases also had occasional multinucleated tumor cells. The lesional cells had a strong tendency for whorled growth, and oftentimes, focal fascicular growth was also present. Nuclear atypia was minimal in 62 cases, mild in 73 cases, at least focally moderate in 41 cases, and focally marked in 2 cases. Mitotic activity ranged from 0 to 124 mitotic figures/25 wide-field high power fields (WHPFs) (median mitotic count: 4 mitotic figures/25WHPFs). Twenty-five lesions had > 10 mitotic figures/25WHPFs. A total of 16 cases (9%) had atypical mitotic figures. Osteoclastlike giant cells were detected in 39% of cases. Immunoreactivity was typically present for vimentin, NKI/C3, CD10, microphthalmia transcription factor, and PGP9.5, and focal reactivity was sometimes noted for smooth muscle actin and CD68. All tumors tested were negative for S 100 protein, glial fibrillary acidic protein, and Melan A. The overwhelming majority of cases had involvement of the tissue margins. A complete follow-up record is available for 71 patients (40.3%) with follow-up intervals ranging from 3 years 2 months to 34 years 9 months (median: 17 y 9 mo). Limited or incomplete follow-up information is also available for an additional 14 patients with follow-up intervals ranging from weeks to approximately 10 years (median: 51 no). Re-growth of tumor after biopsy or local excision was reported in 13 patients, one of whom had 2 recurrences. However, because of the nature of our consultation practice and a tendency for clinicians to specifically send us cases with a complex clinical course, this is believed an overestimation of the true recurrence rate. Neurothekeomas are morphologically and immunohistochemically distinct from true nerve sheath myxomas. An origin from fibroblastic cells with the ability to differentiate into myofibroblasts and a tendency to recruit histiocytic cells is postulated.
C1 USAF, Dept Soft Tissue Pathol, Inst Pathol, Washington, DC 20306 USA.
USAF, Dept Dermatopathol, Inst Pathol, Washington, DC 20306 USA.
Northwestern Univ, Feinberg Sch Med, Dept Pathol, Chicago, IL USA.
RP Fetsch, JF (reprint author), USAF, Dept Soft Tissue Pathol, Inst Pathol, Washington, DC 20306 USA.
EM FETSCH@afip.osd.mil
NR 42
TC 77
Z9 79
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0147-5185
J9 AM J SURG PATHOL
JI Am. J. Surg. Pathol.
PD JUL
PY 2007
VL 31
IS 7
BP 1103
EP 1114
DI 10.1097/PAS.0b013e31802d96af
PG 12
WC Pathology; Surgery
SC Pathology; Surgery
GA 183LG
UT WOS:000247573700016
PM 17592278
ER
PT J
AU Burke, A
Li, L
Kling, E
Kutys, R
Virmani, R
Miettinen, M
AF Burke, Allen
Li, Ling
Kling, Elaine
Kutys, Robert
Virmani, Renu
Miettinen, Markku
TI Cardiac inflammatory myofibroblastic tumor: A "benign" neoplasm that may
result in syncope, myocardial infarction, and sudden death
SO AMERICAN JOURNAL OF SURGICAL PATHOLOGY
LA English
DT Article
DE inflammatory myofibrobastic (pseudo) tumor; sudden death; papillary
fibroelastoma
ID PLASMA-CELL GRANULOMA; ANAPLASTIC LYMPHOMA KINASE; INTRACARDIAC TUMOR;
OLDER-ADULT; PSEUDOTUMOR; HEART; EXPRESSION; MYXOMA
AB Cardiac tumors other than myxomas are rare. We report a series of 10 intracavitary polypoid myofibroblastic proliferations in children and Young adults emphasizing gross, histologic, and clinical features. There were 6 females and 4 males, with a mean age of 10 years (range 5 wk to 21 y). All lesions were endocardial-based, located in the right atrium (1), right ventricular inflow/tricuspid valve (1), right ventricular Outflow (3), initral valve (3), aortic valve/left coronary sinus (1), and left ventricular free wall (1). Symptoms included shortness of breath or dyspnea (3), syncope (2), chest pain (1), transient ischemic attacks (1), and fever with myalgias (1). All tumors were surgical resections, except I tumor that resulted in sudden coronary death and that was diagnosed at autopsy, and I tumor that embolized into the coronary artery and was treated by cardiac transplant. Two tumors, present in the aortic and mitral valves, respectively, caused cardiac ischemia. The tumors were polypoid or filiform and histologically resembled inflammatory myofibroblastic tumors of extracardiac sites, with loose spindle cell growth with sparse inflammation. Although there were frequent collagen bundles interspersed among the tumor cells, there were no large areas of dense fibrosis. Surface fibrin was present on the polypoid projections in 7 cases. Symptoms resulted from prolapse into coronary ostia or embolization, but no patient developed metastasis. Long-term follow-up in 2 patients demonstrated no evidence of disease or recurrence. Although metastatic potential was not identified, these tumors may result in serious symptoms, including myocardial infarct, syncope, and sudden death. These cardiac myofibroblastic tumors Lire readily distinguished from other endocardial-based cardiac tumors, including papillary fibroelastoma and myxoma, which may present clinically in the same manner.
C1 CV Path Inst, Gaithersburg, MD 20878 USA.
Univ Maryland, Sch Med, Baltimore, MD 21201 USA.
USAF, Inst Pathol, Washington, DC 20330 USA.
RP Burke, A (reprint author), CV Path Inst, 19 1st Field Rd, Gaithersburg, MD 20878 USA.
EM allen.burke@gmail.com
NR 34
TC 37
Z9 39
U1 0
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0147-5185
EI 1532-0979
J9 AM J SURG PATHOL
JI Am. J. Surg. Pathol.
PD JUL
PY 2007
VL 31
IS 7
BP 1115
EP 1122
DI 10.1097/PAS.0b013e31802d68ff
PG 8
WC Pathology; Surgery
SC Pathology; Surgery
GA 183LG
UT WOS:000247573700017
PM 17592279
ER
PT J
AU Dreizler, A
Fried, A
Gord, JR
AF Dreizler, Andreas
Fried, Alan
Gord, James R.
TI Laser applications to chemical, security, and environmental analysis:
introduction to the feature issue
SO APPLIED OPTICS
LA English
DT Editorial Material
C1 USAF, Res Lab, Propuls Directorate, Wright Patterson AFB, OH 45433 USA.
Tech Univ Darmstadt, Fachgebiet Energie & Kraftwerkstechn, D-64287 Darmstadt, Germany.
Natl Ctr Atmospher Res, Earth Observ Lab, Boulder, CO 80301 USA.
RP Gord, JR (reprint author), USAF, Res Lab, Propuls Directorate, AFRL PRTC Bldg 5,1950 5th St, Wright Patterson AFB, OH 45433 USA.
EM james.gord@wpafb.af.mil
NR 0
TC 0
Z9 0
U1 0
U2 1
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 JUL 1
PY 2007
VL 46
IS 19
BP 3909
EP 3910
DI 10.1364/AO.46.003909
PG 2
WC Optics
SC Optics
GA 182OA
UT WOS:000247512700001
PM 17571126
ER
PT J
AU Kulatilaka, WD
Lucht, RP
Roy, S
Gord, JR
Settersten, TB
AF Kulatilaka, Waruna D.
Lucht, Robert P.
Roy, Sukesh
Gord, James R.
Settersten, Thomas B.
TI Detection of atomic hydrogen inflames using picosecond two-color
two-photon-resonant six-wave-mixing spectroscopy
SO APPLIED OPTICS
LA English
DT Article; Proceedings Paper
CT Topical Meeting of the Optical-Society-of America on Computational
Sensing and Imaging
CY JUN, 2007
CL Vancouver, CANADA
SP Opt Soc Amer
ID 2-PHOTON POLARIZATION SPECTROSCOPY; LASER-INDUCED FLUORESCENCE; L-ALPHA
LINE; ENERGY-TRANSFER; FLAT FLAMES; EXCITATION; PROFILE; PLASMA
AB We report an investigation of two-color six-wave-mixing spectroscopy techniques using picosecond lasers for the detection of atomic hydrogen in an atmospheric-pressure hydrogen-air flame. An ultraviolet laser at 243 nm was two-photon-resonant with the 2S(1/2) <-<- 1S(1/2) transition, and a visible probe laser at 656 nm was resonant with H, transitions (n = 3 <- n = 2). The signal dependence on the polarization of the pump laser was investigated for a two-beam polarization-spectroscopy experimental configuration and for a four-beam grating configuration. A direct comparison of the absolute signal and background levels in the two experimental geometries demonstrated a significant advantage to using the four-beam grating geometry over the simpler two-beam configuration. Picosecond laser pulses provided sufficient time resolution to investigate hydrogen collisions in the atmospheric-pressure flame. Time-resolved two-color laser-induced fluorescence was used to measure an n = 2 population lifetime of 110 ps, and time-resolved two-color six-wave-mixing spectroscopy was used to measure a coherence lifetime of 76 ps. Based on the collisional time scale, we expect that the six-wave-mixing signal dependence on collisions is significantly reduced with picosecond laser pulses when compared to laser pulse durations on the nanosecond time scale. (C) 2007 Optical Society of America.
C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
Innovat Sci Solut Inc, Dayton, OH 45440 USA.
USAF, Res Lab, Propuls Directorate, Wright Patterson AFB, OH 45433 USA.
RP Settersten, TB (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
EM tbsette@sandia.gov
RI Settersten, Thomas/B-3480-2009
OI Settersten, Thomas/0000-0002-8017-0258
NR 25
TC 9
Z9 9
U1 1
U2 8
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 JUL 1
PY 2007
VL 46
IS 19
BP 3921
EP 3927
DI 10.1364/AO.46.003921
PG 7
WC Optics
SC Optics
GA 182OA
UT WOS:000247512700003
PM 17571128
ER
PT J
AU Johnson, S
AF Johnson, Steven
TI Comments on "Comparison between orthogonal subspace projection and
background subtraction techniques applied to remote-sensing data"
SO APPLIED OPTICS
LA English
DT Editorial Material
AB Ben-David and Ren [Appl. Opt. 44, 3846 (2005)] discussed methods of estimating the concentration of chemical vapor plumes in hyperspectral. images. The authors of that paper concluded that a technique called orthogonal subspace projection (OSP) produces better concentration estimates than background subtraction when certain stochastic noise conditions are present in the data. While that conclusion is correct, it is worth noting that the data can be whitened to improve the performance of the background subtraction method. In particular, if the noise is multivariate Gaussian, then whitening will ensure that the background subtraction method is superior to OSP. (C) 2007 Optical Society of America.
C1 USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Johnson, S (reprint author), USAF, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM steven.johnson.ctr@afit.edu
NR 4
TC 1
Z9 1
U1 0
U2 0
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 JUL 1
PY 2007
VL 46
IS 19
BP 4162
EP 4163
DI 10.1364/AO.46.004162
PG 2
WC Optics
SC Optics
GA 182OA
UT WOS:000247512700034
PM 17571159
ER
PT J
AU Mass, J
Avella, M
Jimenez, J
Callahan, M
Grant, E
Rakes, K
Bliss, D
Wang, B
AF Mass, J.
Avella, M.
Jimenez, J.
Callahan, M.
Grant, E.
Rakes, K.
Bliss, D.
Wang, B.
TI Cathodoluminescence study of visible luminescence in hydrothermal ZnO
crystals
SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
LA English
DT Article
ID SINGLE-CRYSTALS; EMITTING-DIODES; N-ZNO; GROWTH; PHOTOLUMINESCENCE;
HETEROJUNCTION; PENETRATION; FABRICATION; P-SRCU2O2; FILMS
AB We present a study of the visible luminescence in ZnO hydrothermal crystals. The study is carried out on oxygen polarity basal plane (000-1) plates that are sliced through several distinct growth sectors of the crystal. The plates reveal three distinct regions that display differences in the luminescence emission, especially in the visible range. These differences should be related to the variation in the distribution of impurities and native defects in the various growth sectors of hydrothermal ZnO. CL images also expose the presence of nonradiative recombination centers that are associated with point defects or complexes of point defects. CL measurements varying the acceleration voltage of the e-beam reveal that the deep levels responsible for the green luminescence, and in a minor extension those responsible for the yellow-orange luminescence are depleted near the surface. A discussion about the main hypothesis accounting for such behavior is presented.
C1 ETSII, Valladolid 47011, Spain.
USAF, Res Lab, Sensors Directorate, Hanscom AFB, MA 01731 USA.
Solid State Sci Corp, Nashua, NH 03049 USA.
RP Jimenez, J (reprint author), ETSII, Valladolid 47011, Spain.
EM jimenez@fmc.uva.es
NR 24
TC 4
Z9 4
U1 0
U2 7
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0947-8396
EI 1432-0630
J9 APPL PHYS A-MATER
JI Appl. Phys. A-Mater. Sci. Process.
PD JUL
PY 2007
VL 88
IS 1
BP 95
EP 98
DI 10.1007/s00339-007-3973-1
PG 4
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 168YZ
UT WOS:000246561200018
ER
PT J
AU Carroll, MB
Higgs, JB
AF Carroll, Matthew B.
Higgs, Jay B.
TI Synovial haemangioma presenting as a recurrent monoarticular
haemarthrosis
SO ARCHIVES OF DISEASE IN CHILDHOOD
LA English
DT Editorial Material
C1 Wilford Hall USAF Med Ctr, SAUSHEC, Lackland AFB, TX 78236 USA.
RP Carroll, MB (reprint author), Wilford Hall USAF Med Ctr, SAUSHEC, 2200 Bergquist Dr,Ste 1, Lackland AFB, TX 78236 USA.
EM matthew.carroll@lackland.af.mil
NR 0
TC 6
Z9 8
U1 0
U2 0
PU B M J PUBLISHING GROUP
PI LONDON
PA BRITISH MED ASSOC HOUSE, TAVISTOCK SQUARE, LONDON WC1H 9JR, ENGLAND
SN 0003-9888
J9 ARCH DIS CHILD
JI Arch. Dis. Child.
PD JUL
PY 2007
VL 92
IS 7
BP 623
EP 624
DI 10.1136/adc.2006.114066
PG 2
WC Pediatrics
SC Pediatrics
GA 181YH
UT WOS:000247471800017
PM 17588975
ER
PT J
AU Lockwood, GW
Skiff, BA
Henry, GW
Henry, S
Radick, RR
Baliunas, SL
Donahue, RA
Soon, W
AF Lockwood, G. W.
Skiff, B. A.
Henry, Gregory W.
Henry, Stephen
Radick, R. R.
Baliunas, S. L.
Donahue, R. A.
Soon, W.
TI Patterns of photometric and chromospheric variation among Sun-like
stars: A 20 year perspective
SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
LA English
DT Article
DE stars : activity; stars : late-type; stars : variables : other
ID LOWER MAIN-SEQUENCE; SOLAR-TYPE STARS; HYADES STARS; STANDARD STARS;
VARIABILITY; ROTATION; IRRADIANCE; LUMINOSITY; MODULATION; EMISSION
AB We examine patterns of variation of 32 primarily main-sequence Sun-like stars [ selected at project onset as stars on or near the main sequence and color index 0.42 <= (B - V) <= 1.4], extending our previous 7-12 yr time series to 13-20 yr by combining Stromgren b, y photometry from Lowell Observatory with similar data from Fairborn Observatory. Parallel chromospheric Ca II H and K emission data from the Mount Wilson Observatory span the entire interval. The extended data strengthen the relationship between chromospheric and brightness variability at visible wavelengths derived previously. We show that the full range of photometric variation has probably now been observed for a majority of the program stars. Twenty-seven stars are deemed variable according to an objective statistical criterion. On a year-to-year timescale, young active stars become fainter when their Ca II emission increases, while older less active stars such as the Sun become brighter when their Ca II emission increases. The Sun's total irradiance variation, scaled to the b and y stellar filter photometry, still appears to be somewhat smaller than stars in our limited sample with similar mean chromospheric activity, but we now regard this discrepancy as probably due mainly to our limited stellar sample.
C1 Lowell Observ, Flagstaff, AZ 86001 USA.
Tennessee State Univ, Nashville, TN 37203 USA.
USAF, Res Lab, Natl Solar Observ, Tucson, AZ 85726 USA.
Ctr Astrophys, Cambridge, MA 02138 USA.
RP Lockwood, GW (reprint author), Lowell Observ, 1400 W Mars Hill Rd, Flagstaff, AZ 86001 USA.
NR 34
TC 125
Z9 125
U1 1
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0067-0049
J9 ASTROPHYS J SUPPL S
JI Astrophys. J. Suppl. Ser.
PD JUL
PY 2007
VL 171
IS 1
BP 260
EP 303
DI 10.1086/516752
PG 44
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 182ZL
UT WOS:000247542400010
ER
PT J
AU Becker, A
Wotawa, G
De Geer, LE
Seibert, P
Draxler, RR
Sloan, C
D'Amours, R
Hort, M
Glaab, H
Heinrich, P
Grillon, Y
Shershakov, V
Katayama, K
Zhang, YT
Stewart, P
Hirtl, M
Jean, M
Chen, P
AF Becker, Andreas
Wotawa, Gerhard
De Geer, Lars-Erik
Seibert, Petra
Draxler, Roland R.
Sloan, Craig
D'Amours, Real
Hort, Matthew
Glaab, Hubert
Heinrich, Philippe
Grillon, Yves
Shershakov, Vyacheslav
Katayama, Keiichi
Zhang, Yuetang
Stewart, Paul
Hirtl, Marcus
Jean, Michel
Chen, Peter
TI Global backtracking of anthropogenic radionuclides by means of a
receptor oriented ensemble dispersion modelling system in support of
Nuclear-Test-Ban Treaty verification
SO ATMOSPHERIC ENVIRONMENT
LA English
DT Article
DE long-range Lagrangian dispersion models; multi-model backward ensemble
dispersion modelfing; inversion model evaluation; global nuclear
monitoring
ID ETEX DATA; PART I; TRANSPORT; UNCERTAINTY; VALIDATION; FORECASTS;
FLEXPART; ANATEX
AB In this paper, we introduce a methodology for quality assessment of backtracking models. We present results illustrating the level of agreement between the backtracking models, and the accuracy of each model and the ensemble model in resolving the geo-temporal reference of a single point source. Both assessments are based on an ensemble of 12 different Lagrangian particle dispersion modelling (LPDM) systems utilized in receptor oriented (adjoint) mode during an international numerical experiment dedicated to source region estimation.
As major result, we can confirm that the findings of Galmarini et al. [2004b. Ensemble prediction forecasting-Part 11: application and evaluation. Atmospheric Environment 38, 4619-4632] and Delle Monache and Stull [2003. An ensemble airquality forecast over Europe during an ozone episode. Atmospheric Environment 37, 3469-3474], regarding the superiority of the ensemble dispersion forecast over a single forecast, do also apply to LPDM when utilized for backtracking purposes, in particular if only vague a priori knowledge of the source time is available. This, however, is a likely situation in the context of the global nuclear monitoring performed by the Provisional Technical Secretariat (PTS) of the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), where quick but reliable source location identification is required. We introduce a simple methodology as a template for a future electronic emergency response system in the field of dispersion modelling. (c) 2007 Elsevier Ltd. All rights reserved.
C1 Vienna Int Data Ctr, Preparatory Commiss Comprehens Nucl Test Ban Trea, A-1400 Vienna, Austria.
Univ Nat Resources & Appl Life Sci, Inst Meteorol, A-1190 Vienna, Austria.
NOAA, Silver Spring, MD 20910 USA.
US Natl Data Ctr, HQ AF Tech Applicat Ctr, TMAR, Patrick AFB, FL 32925 USA.
Canadian Meteorol Ctr, Environm Emergency Response Div, Dorval, PQ H9P 1J3, Canada.
Met Off, Exeter EX1 3PB, Devon, England.
Deutsch Wetterdienst, D-63067 Offenbach, Germany.
CEA, F-91680 Bruyeres Le Chatel, France.
Fed Emergency Response Ctr, FEERC Roshydromet, SPA Typhoon, Obninsk 249038, Kaluga, Russia.
Japan Meteorol Agcy, Chiyoda Ku, Tokyo 1008122, Japan.
Natl Meteorol Ctr, China Meteorol Adm, Beijing 100081, Peoples R China.
Natl Meteorol & Oceanog Ctr, Bur Meteorol, Melbourne, Vic 3000, Australia.
ZAMG, A-1190 Vienna, Austria.
World Meteorol Org, CH-1211 Geneva 2, Switzerland.
RP Becker, A (reprint author), Vienna Int Data Ctr, Preparatory Commiss Comprehens Nucl Test Ban Trea, POB 1200, A-1400 Vienna, Austria.
EM andreas.becker@ctbto.org
NR 42
TC 18
Z9 18
U1 2
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1352-2310
J9 ATMOS ENVIRON
JI Atmos. Environ.
PD JUL
PY 2007
VL 41
IS 21
BP 4520
EP 4534
DI 10.1016/j.atmosenv.2006.12.048
PG 15
WC Environmental Sciences; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
GA 186WY
UT WOS:000247810500014
ER
PT J
AU Paul, MA
Miller, JC
Gray, G
Buick, F
Blazeski, S
Arendt, J
AF Paul, Michel A.
Miller, James C.
Gray, Gary
Buick, Fred
Blazeski, Sofi
Arendt, Josephine
TI Circadian phase delay induced by phototherapeutic devices
SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE
LA English
DT Article
DE phototherapy; melatonin suppression; dim light melatonin onset;
circadian phase delay
ID PLASMA MELATONIN; LIGHT WAVELENGTH; ACTION SPECTRUM; DIM LIGHT;
SUPPRESSION; HUMANS; PHOTORECEPTOR; VOLUNTEERS; PACEMAKER; POSTURE
AB Introduction: The Canadian Forces has initiated a multiple study project to optimize circadian phase changes using appropriately timed phototherapy and/or ingestion of melatonin for those personnel on long-range deployments and shift workers. The work reported here compared four phototherapeutic devices for efficacy in effecting circadian phase delays. Methods: In a partially counterbalanced treatment order, 14 subjects (7 men and 7 women), ages 18-51 yr, participated in 5 weekly experimental sessions of phototherapy with 4 different phototherapy devices (light tower, light visor, Litebook, LED spectacles) and a no-phototherapy control. Phototherapy was applied from 24:00 to 02:00 on night 1. Dim light melatonin onset (DLMO) was assessed on night I and night 2. Subjects were tested for psychomotor performance (serial reaction time, logical reasoning, and serial subtraction tasks) and completed the Stanford Sleepiness Scale on night I at 19:00, 23:00, 01:00, 02:00, and 03:00. After phototherapy, subjects completed a phototherapy side-effects questionnaire. Results: All phototherapy devices produced melatonin suppression and significant phase delays. Sleepiness was significantly decreased with the light tower, the light visor, and the Litebook. Task performance was only slightly improved with phototherapy. The LED spectacles and light visor caused greater subjective performance impairment, more difficulty viewing the computer monitor and reading printed text than the light tower or the Litebook. The light visor, the Litebook, and the LED spectacles caused more eye discomfort than the light tower. Conclusions: The light tower was the best device, producing melatonin suppression and circadian phase change while relatively free of side effects.
C1 Def Res & Dev Canada, N York, ON M3M 3B9, Canada.
USAF, AFRL, San Antonio, TX USA.
Univ Surrey, Ctr Chronobiol, Surrey, England.
RP Paul, MA (reprint author), Def Res & Dev Canada, 1133 Sheppard Ave W, PO Box 2000, N York, ON M3M 3B9, Canada.
EM mpaul@drdc-rddc.gc.ca
NR 29
TC 15
Z9 15
U1 0
U2 2
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 0095-6562
J9 AVIAT SPACE ENVIR MD
JI Aviat. Space Environ. Med.
PD JUL
PY 2007
VL 78
IS 7
BP 645
EP 652
PG 8
WC Public, Environmental & Occupational Health; Medicine, General &
Internal; Sport Sciences
SC Public, Environmental & Occupational Health; General & Internal
Medicine; Sport Sciences
GA 186KA
UT WOS:000247776400001
PM 17679560
ER
PT J
AU Luckarift, HR
Balasubramanian, S
Paliwal, S
Johnson, GR
Simonian, AL
AF Luckarift, Heather R.
Balasubramanian, Shankar
Paliwal, Sheetal
Johnson, Glenn R.
Simonian, Aleksandr L.
TI Enzyme-encapsulated silica monolayers for rapid functionalization of a
gold surface
SO COLLOIDS AND SURFACES B-BIOINTERFACES
LA English
DT Article; Proceedings Paper
CT Symposium on Frontiers in Colloidal, Surface and Supramolecular
Chemistry in Biomedical Applications held at the Western Regional
Meeting of the American-Chemical-Society
CY 2006
CL Anaheim, CA
SP Amer Chem Soc
DE surface plasmon resonance; silica; organophosphate hydrolase; enzyme
immobilization; paraoxon
ID PLASMON RESONANCE SENSORS; STAPHYLOCOCCUS-AUREUS; BIOMIMETIC SILICA;
IMMOBILIZATION; BIOSENSORS; PROTEINS; FILM; MICROARRAY; ADSORPTION;
INTERFACES
AB We report a simple and rapid method for the deposition of amorphous silica onto a gold surface. The method is based on the ability of lysozyme to mediate the formation of silica nanoparticles. A monolayer of lysozyme is deposited via non-specific binding to gold. The lysozyme then mediates the self-assembled formation of a silica monolayer. The silica formation described herein occurs on a surface plasmon resonance (SPR) gold surface and is characterized by SPR spectroscopy. The silica layer significantly increases the surface area compared to the gold substrate and is directly compatible with a detection system. The maximum surface concentration of lysozyme was found to be a monolayer of 2.6 ng/mm(2) which allowed the deposition of a silica layer of a further 2 ng/mm2. For additional surface functionalization, the silica was also demonstrated to be a suitable matrix for immobilization of biomolecules. The encapsulation of organophosphate hydrolase (OPH) was demonstrated as a model system. The silica forms at ambient conditions in a reaction that allows the encapsulation of enzymes directly during silica formation. OPH was successfully encapsulated within the silica particles and a detection limit for the substrate, paraoxon, using the surface-encapsulated enzyme was found to be 20 mu M. (c) 2006 Elsevier B.V. All rights reserved.
C1 Auburn Univ, Samuel Ginn Coll Engn, Mat Res & Educ Ctr, Auburn, AL 36489 USA.
Air Force Res Lab, Tyndall AFB, FL 32403 USA.
RP Simonian, AL (reprint author), Auburn Univ, Samuel Ginn Coll Engn, Mat Res & Educ Ctr, 275 Wilmore, Auburn, AL 36489 USA.
EM simonal@eng.auburn.edu
RI Balasubramanian, Shankar Ganesh/B-1048-2009
OI Balasubramanian, Shankar Ganesh/0000-0002-6149-6471
NR 36
TC 37
Z9 37
U1 1
U2 16
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-7765
J9 COLLOID SURFACE B
JI Colloid Surf. B-Biointerfaces
PD JUL 1
PY 2007
VL 58
IS 1
BP 28
EP 33
DI 10.1016/j.colsurfb.2006.08.013
PG 6
WC Biophysics; Chemistry, Physical; Materials Science, Biomaterials
SC Biophysics; Chemistry; Materials Science
GA 186WZ
UT WOS:000247810600006
PM 16996252
ER
PT J
AU Fessler, HE
Derdak, S
Ferguson, ND
Hager, DN
Kacmarek, RM
Thompson, T
Brower, RG
AF Fessler, Henry E.
Derdak, Stephen
Ferguson, Niall D.
Hager, David N.
Kacmarek, Robert M.
Thompson, Taylor
Brower, Roy G.
TI A protocol for high-frequency oscillatory ventilation in adults: Results
from a roundtable discussion
SO CRITICAL CARE MEDICINE
LA English
DT Article
DE mechanical ventilation; high-frequency ventilation; protocols; acute
respiratory distress syndrome; acute lung injury; ventilator-associated
lung injury; acute respiratory failure
ID RESPIRATORY-DISTRESS-SYNDROME; CONVENTIONAL MECHANICAL VENTILATION;
EXPIRATORY PRESSURE TRIAL; CHRONIC LUNG-DISEASE; RECRUITMENT MANEUVERS;
TIDAL VOLUME; GAS-EXCHANGE; INJURY; MODEL; STRATEGY
AB Objective: Ventilator settings typically used for high-frequency oscillatory ventilation (HFO) in adults provide acceptable gas exchange but may not take best advantage of its lung-protective aspects. We provide guidelines for HFO in adults with acute respiratory distress syndrome that should optimize the lung-protective characteristics of this ventilation mode.
Design: Roundtable discussions, iterative revisions, and consensus.
Setting: Five academic medical centers.
Patients: Not applicable.
Interventions: Participants addressed how to best maintain ventilation through combinations of oscillation pressure amplitude, frequency, and the use of an endotracheal tube cuff leak, and to maintain oxygenation through combinations of recruitment maneuvers, mean airway pressure, and oxygen concentration. The guiding principles were to provide lung protective ventilation by minimizing the size of tidal volumes, and balance the risks and benefits of lung recruitment and distension.
Main Results: HFO may provide smaller tidal volumes and more complete lung recruitment than conventional modes. To optimize these features, we recommend use of the maximum pressure-oscillation amplitude coupled with the highest tolerated frequency, targeting a pH of only 7.25-7.35. This will yield a smaller tidal volume than typical HFO settings where frequency is limited to 6 Hz or less and pressure amplitude is submaximal. Lung recruitment can be achieved with the use of recruitment maneuvers, especially during the first several days of HFO. Recruitment may be augmented or sustained with generous mean airway pressures. These may either be chosen from a table of recommended mean airway pressure and oxygen concentration combinations, or individually titrated based on the oxygenation response of each patient.
Conclusions: Modification of the goals and tactics of HFO use may better protect against ventilator-associated lung injury. Further clinical trials are needed to compare the effects on patient outcome of the best use of HFO compared to the most protective use of conventional modes in adult acute respiratory distress syndrome.
C1 Johns Hopkins Med Inst, Div Pulm & Crit Care Med, Baltimore, MD 21205 USA.
Wilford Hall USAF Med Ctr, San Antonio, TX USA.
Univ Toronto, Interdept Div Crit Care Med, Toronto, ON, Canada.
Massachusetts Gen Hosp, Dept Resp Care, Div Pulm & Crit Care Med, Boston, MA 02114 USA.
RP Fessler, HE (reprint author), Johns Hopkins Med Inst, Div Pulm & Crit Care Med, Baltimore, MD 21205 USA.
EM hfessler@jhmi.edu
OI Ferguson, Niall/0000-0002-6213-5264
FU NHLBI NIH HHS [HL 073994-01]
NR 32
TC 68
Z9 70
U1 1
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0090-3493
J9 CRIT CARE MED
JI Crit. Care Med.
PD JUL
PY 2007
VL 35
IS 7
BP 1649
EP 1654
DI 10.1097/01.CCM.0000269026.40739.2E
PG 6
WC Critical Care Medicine
SC General & Internal Medicine
GA 181GB
UT WOS:000247424100003
PM 17522576
ER
PT J
AU Trohalaki, S
Pachter, R
AF Trohalaki, Steven
Pachter, Ruth
TI Mechanism of hydrogen production in [Fe-Fe]-Hydrogenase: A density
functional theory study
SO ENERGY & FUELS
LA English
DT Article
ID FE-ONLY HYDROGENASES; GENERALIZED GRADIENT APPROXIMATION; ACTIVE-SITE;
DESULFOVIBRIO-DESULFURICANS; ELECTRONIC-STRUCTURE; H-CLUSTER;
EXCHANGE-ENERGY; REDOX STATE; IRON; SUBCLUSTER
AB [Fe-Fe]-hydrogenases are a class of metalloenzymes that catalyze the production of H-2 from two protons and two electrons. In this work, we used density functional theory (DFT) calculations to analyze the mechanism of hydrogen production, providing insight into the role of the intermediates in the catalysis. We also validated the exchange-correlation functional applied within DFT for model compounds of the active site in [Fe-Fe]-hydrogenase, enabling us a reliable application for understanding previously established hydrogen production hypotheses, as well as providing a starting point for a future investigation of the effects of the protein environment on the catalytic mechanism of [Fe-Fe]-hydrogenases.
C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
Gen Dynam Informat Technol Inc, Dayton, OH 45431 USA.
RP Trohalaki, S (reprint author), USAF, Res Lab, Mat & Mfg Directorate, 3005 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM steven.trohalaki@wpafb.af.mil; ruth.pachter@wpafb.af.mil
NR 38
TC 7
Z9 7
U1 1
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0887-0624
EI 1520-5029
J9 ENERG FUEL
JI Energy Fuels
PD JUL-AUG
PY 2007
VL 21
IS 4
BP 2278
EP 2286
DI 10.1021/ef060577n
PG 9
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA 190UC
UT WOS:000248085100057
ER
PT J
AU Newlon, JL
Couch, M
Brennan, J
AF Newlon, James L.
Couch, Marion
Brennan, Joseph
TI Castleman's disease: Three case reports and a review of the literature
SO ENT-EAR NOSE & THROAT JOURNAL
LA English
DT Review
ID LYMPH-NODE HYPERPLASIA; HIV-INFECTION; EXPRESSION; INTERLEUKIN-6; VIRUS;
VIL-6
AB Castleman's disease is a rare lymphoproliferative disorder that is easily misdiagnosed. When it occurs in the head/neck and thorax, it can pose a diagnostic dilemma because of its lack of any specific presenting characteristics and distinguishing radiographic features. An accurate histopathologic diagnosis and careful staging are crucial to planning treatment. The highly vascular nature of the tumor makes surgical management challenging, and it warrants preoperative embolization whenever possible. We report 3 cases of Castleman's disease that involved the head/neck and thorax. We also review the presenting clinical features of Castleman's disease, its histopathologic characteristics, and the diagnostic and treatment challenges that it poses.
C1 William Beaumont Army Med Ctr, Dept Otolaryngol Head & Neck Surg, El Paso, TX 79920 USA.
Johns Hopkins Univ Hosp, Dept Otolaryngol, Baltimore, MD 21287 USA.
Wilford Hall USAF Med Ctr, Dept Otolaryngol Head & Neck Surg, San Antonio, TX 78236 USA.
RP Newlon, JL (reprint author), William Beaumont Army Med Ctr, Dept Otolaryngol Head & Neck Surg, 5005 N Piedras, El Paso, TX 79920 USA.
EM james.newlon@us.army.mil
NR 25
TC 14
Z9 15
U1 0
U2 0
PU VENDOME GROUP LLC
PI NEW YORK
PA 149 FIFTH AVE, 10TH FLOOR, NEW YORK, NY 10010 USA
SN 0145-5613
J9 ENT-EAR NOSE THROAT
JI ENT-Ear Nose Throat J.
PD JUL
PY 2007
VL 86
IS 7
BP 414
EP 418
PG 5
WC Otorhinolaryngology
SC Otorhinolaryngology
GA 193KT
UT WOS:000248273600021
PM 17702325
ER
PT J
AU Spinetta, L
AF Spinetta, Lawrence
TI Defense spending
SO FOREIGN AFFAIRS
LA English
DT Letter
C1 USAF, Washington, DC 20330 USA.
RP Spinetta, L (reprint author), USAF, Washington, DC 20330 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU COUNC FOREIGN RELAT INC
PI NEW YORK
PA 58 E 68TH ST, NEW YORK, NY 10021 USA
SN 0015-7120
J9 FOREIGN AFF
JI Foreign Aff.
PD JUL-AUG
PY 2007
VL 86
IS 4
BP 169
EP 170
PG 2
WC International Relations
SC International Relations
GA 179DT
UT WOS:000247270400017
ER
PT J
AU Yaghjian, AD
AF Yaghjian, Arthur D.
TI Bidirectionality of reciprocal, lossy or lossless, uniform or periodic
waveguides
SO IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
LA English
DT Article
DE propagation constants; waveguide
AB Using the scattering-matrix equations for two antennas placed in the fields of a waveguide, it is proven that all reciprocal, lossy or lossless, uniform or periodic waveguides are bidirectional. Since Maxwell's equations imply directly that propagation constants on a lossless reciprocal waveguide come in pairs (beta, -beta*), "complex waves" on a lossless reciprocal, uniform or periodic waveguide come in quadruplets with propagation constants (beta, -beta, beta*, -beta*).
C1 USAF, Res Lab, Sensors Directorate AFRL SNHA, Hanscom AFB, MA 01731 USA.
RP Yaghjian, AD (reprint author), USAF, Res Lab, Sensors Directorate AFRL SNHA, Hanscom AFB, MA 01731 USA.
EM arthur.yaghjian@hanscom.af.mil
NR 10
TC 9
Z9 9
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1531-1309
J9 IEEE MICROW WIREL CO
JI IEEE Microw. Wirel. Compon. Lett.
PD JUL
PY 2007
VL 17
IS 7
BP 480
EP 482
DI 10.1109/LMWC.2007.899294
PG 3
WC Engineering, Electrical & Electronic
SC Engineering
GA 187ZR
UT WOS:000247888500005
ER
PT J
AU Shima, T
Rasmussen, S
Gross, D
AF Shima, Tal
Rasmussen, Steve
Gross, Dave
TI Assigning micro UAVs to task tours in an urban terrain
SO IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
LA English
DT Article
DE assignments; Dubin's car; flight tests; task tours; traveling salesman
problem (TSP); unmanned aerial vehicle (UAV); urban
AB An optimization algorithm for assigning in realtime multiple unmanned aerial vehicles (UAVs) to task tours is presented and tested as part of a flight demonstration program. The scenario of interest is one where multiple microaerial vehicles are launched from a small UAV in order to investigate selected targets in an urban terrain. For path planning, we use the Dubin's car model so that the vehicles' dynamic constraint of minimum turning radius is taken into account. Due to the prohibitive computational complexity of the coupled path optimization and assignment problem, we solve the problem by ordering a set of tasks based on the Euclidean distance, utilizing a traveling salesman problem solver. We apply upper and lower bounding procedures iteratively on active subsets within the set of feasible group assignments, enabling efficient search of the solution space. The online implementation of the algorithm is discussed and simulation results confirm the efficiency of the proposed algorithm. Results from recent flight tests are also provided.
C1 Technion Israel Inst Technol, Dept Aerosp Engn, IL-32000 Haifa, Israel.
USAF, Res Labs, Control Sci Ctr Excellence, Wright Patterson AFB, OH 45433 USA.
RP Shima, T (reprint author), Technion Israel Inst Technol, Dept Aerosp Engn, IL-32000 Haifa, Israel.
EM tal.shima@technion.ac.il; steve.rasmussen@wpafb.af.mil;
david.gross@wpafb.af.mil
NR 10
TC 25
Z9 28
U1 3
U2 21
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1063-6536
J9 IEEE T CONTR SYST T
JI IEEE Trans. Control Syst. Technol.
PD JUL
PY 2007
VL 15
IS 4
BP 601
EP 612
DI 10.1109/TCST.2007.899154
PG 12
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA 184MJ
UT WOS:000247645500002
ER
PT J
AU Johnson, RW
Wang, C
Liu, Y
Scofield, JD
AF Johnson, R. Wayne
Wang, Cai
Liu, Yi
Scofield, James D.
TI Power device packaging technologies for extreme environments
SO IEEE TRANSACTIONS ON ELECTRONICS PACKAGING MANUFACTURING
LA English
DT Article
DE die attach; high-temperature aging; passivation; wire bonding
AB Silicon carbide is a wide-bandgap semiconductor capable of operation at temperatures in excess of 300 degrees C. However, high-temperature packaging to interface with the other elements of the electrical system is required. Die attach, wire bonding, and passivation materials and techniques have been demonstrated for use at 300 degrees C. Transient liquid phase bonding has been developed with Au:Sn/Au, yielding high die shear strength after 2000 h at 400 degrees C. Large diameter (250 mu m) gold and platinum wire bonding was evaluated for top side electrical contact. An wire was reliable after 2000 h at 300 degrees C with Ti/Ti:W/Au pads over passivation on the SiC. However, An wire on Ti/Pt/Au and Pt wire on both Ti/TI:W/Au and Ti/Pt/Au exhibited passivation fracture with aging. Polyimide has been demonstrated for 2000 h at 300 degrees C in air as a high-voitage passivation layer.
C1 Auburn Univ, Dept Elect & Comp Engn, Lab Elect Assembly & Packaging, Auburn, AL 36849 USA.
AFRL, PRPE, Wright Patterson AFB, OH 45433 USA.
RP Johnson, RW (reprint author), Auburn Univ, Dept Elect & Comp Engn, Lab Elect Assembly & Packaging, Auburn, AL 36849 USA.
EM johnson@eng.auburn.edu
NR 19
TC 41
Z9 43
U1 2
U2 13
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1521-334X
J9 IEEE T ELECTRON PACK
JI IEEE Trans. Electron. Packag. Manuf.
PD JUL
PY 2007
VL 30
IS 3
BP 182
EP 193
DI 10.1109/TEMP.2007.899158
PG 12
WC Engineering, Manufacturing
SC Engineering
GA 189IZ
UT WOS:000247983900002
ER
PT J
AU Deng, H
Himed, B
Wicks, MC
AF Deng, Hai
Himed, Braham
Wicks, Michael C.
TI Concurrent extraction of target range and Doppler information by using
orthogonal coding waveforms
SO IEEE TRANSACTIONS ON SIGNAL PROCESSING
LA English
DT Article
DE pulse Doppler radar; radar measurements; radar signal processing;
waveform design
ID CROSS-CORRELATION PROPERTIES; NETTED RADAR SYSTEMS; GOOD
AUTOCORRELATION; BINARY SEQUENCES; DESIGN
AB In this paper, a novel approach for concurrent extraction of target range and Doppler information in radar systems is introduced. A pair of orthogonal waveforms with different pulse repetition frequencies (PRF) are bundled and transmitted as a single hybrid radar waveform for target measurement. At the receiver, two orthogonal signal processing channels consisting of a low PRF (LPRF) channel and a high PRF (HPRF) one, perform the extraction of target range and Doppler information, respectively. The CLEAN algorithm is innovatively used to suppress the interference from the cross-correlation residues and the autocorrelation side-lobe in the LPRF channel. The processing results, based on the proposed signal processing approach, demonstrate the technical feasibility of implementing such a signal processing scheme in radar systems.
C1 Univ N Texas, Dept Elect Engn, Denton, TX 76203 USA.
Signal Labs, Reston, VA USA.
USAF, Res Lab, Rome, NY 13441 USA.
RP Deng, H (reprint author), Univ N Texas, Dept Elect Engn, Denton, TX 76203 USA.
EM hai@unt.edu
NR 21
TC 1
Z9 4
U1 1
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1053-587X
J9 IEEE T SIGNAL PROCES
JI IEEE Trans. Signal Process.
PD JUL
PY 2007
VL 55
IS 7
BP 3294
EP 3301
DI 10.1109/TSP.2007.894397
PN 1
PG 8
WC Engineering, Electrical & Electronic
SC Engineering
GA 182EU
UT WOS:000247488700013
ER
PT J
AU Daum, LT
Canas, LC
Arulanandam, BP
Niemeyer, D
Valdes, JJ
Chambers, JP
AF Daum, Luke T.
Canas, Linda C.
Arulanandam, Bernard P.
Niemeyer, Debra
Valdes, James J.
Chambers, James P.
TI Real-time RT-PCR assays for type and subtype detection of influenza A
and B viruses
SO INFLUENZA AND OTHER RESPIRATORY VIRUSES
LA English
DT Article
DE H1; H3; H5; influenza A/B; RT-PCR
AB Influenza viruses type A (H3N2 and H1N1 subtypes) and B are the most prevalently circulating human influenza viruses. However, an increase in several confirmed cases of high pathogenic H5N1 in humans has raised concerns of a potential pandemic underscoring the need for rapid, point of contact detection. In this report, we describe development and evaluation of 'type,' i.e., influenza virus A and B, and 'subtype,' i.e., H1, H3, and H5, specific, single-step/reaction vessel format, real-time RTPCR assays using total RNA from archived reference strains, shell-vial cultured and uncultured primary (throat swab/nasal wash) clinical samples. The type A and B specific assays detected all 16 influenza type A viruses and both currently circulating influenza B lineages (Yamagata and Victoria), respectively. 'Type' and 'subtype' specific assays utilize one common set of thermocycling conditions, are specific and highly sensitive (detection threshold of approximately 100 target template molecules). All clinical specimens and samples were evaluated using both the unconventional portable Ruggedized Advanced Pathogen Identification Device (RAPID) and standard laboratory bench LightCycler instruments. These potentially field-deployable assays could offer significant utility for rapid, point of care screening needs arising from a pandemic influenza outbreak.
C1 [Daum, Luke T.; Arulanandam, Bernard P.; Chambers, James P.] Univ Texas San Antonio, Dept Biol, San Antonio, TX 78249 USA.
[Daum, Luke T.; Arulanandam, Bernard P.; Chambers, James P.] Ctr Excellence Biotechnol Bioproc Educ & Res, Brooks City Base, TX USA.
[Canas, Linda C.] USAF, Inst Operat Hlth, Brooks City Base, TX USA.
[Niemeyer, Debra] USAF, Off Surg Gen, Pentagon, Arlington, VA USA.
[Valdes, James J.] Edgewood Chem Biol Ctr, Aberdeen Proving Ground, MD USA.
RP Chambers, JP (reprint author), Univ Texas San Antonio, Dept Biol, 6900 N Loop W, San Antonio, TX 78249 USA.
EM James.chambers@utsa.edu
RI Arulanandam, Bernard/O-9501-2014
FU NIH [3S06GM008194-25S1]; Center of Excellence in Biotechnology,
Bioprocessing, Education, and Research (CEBBER)
FX This work was supported in part from NIH Grant 3S06GM008194-25S1 and
funding from The Center of Excellence in Biotechnology, Bioprocessing,
Education, and Research (CEBBER), The University of Texas at San
Antonio. Additionally, we wish to acknowledge Drs. Joel Gaydos, Rodney L
Coldren, and Forrest Littlebird and the DoD Global Emerging Infectious
Surveillance (DoD-GEIS) for their contributions and support of this
work.
NR 33
TC 20
Z9 20
U1 0
U2 1
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 JUL
PY 2007
VL 1
IS 4
BP 167
EP 175
DI 10.1111/j.1750-2659.2007.00024.x
PG 9
WC Infectious Diseases; Virology
SC Infectious Diseases; Virology
GA V04PI
UT WOS:000207069900005
PM 19432632
ER
PT J
AU Deming, RW
Perlovsky, LI
AF Deming, Ross W.
Perlovsky, Leonid I.
TI Concurrent multi-target localization, data association, and navigation
for a swarm of flying sensors
SO INFORMATION FUSION
LA English
DT Article
DE sensor fusion; unmanned aerial vehicles; mixture model; dynamic logic;
expectation-maximization; maximum-likelihood; concurrent data
association and tracking; photogrammetry
ID MOBILE ROBOT; DATA FUSION; TRACKING; OBJECTS
AB We are developing a probabilistic technique for performing multiple target detection and localization based on data from a swarm of flying sensors, for example to be mounted on a group of micro-UAVs (unmanned aerial vehicles). Swarms of sensors can facilitate detecting and discriminating low signal-to-clutter targets by allowing correlation between different sensor types and/or different aspect angles. However, for deployment of swarms to be feasible, UAVs must operate more autonomously. The current approach is designed to reduce the load on humans controlling UAVs by providing computerized interpretation of a set of images from multiple sensors. We consider a complex case in which target detection and localization are performed concurrently with sensor fusion, multi-target signature association, and improved UAV navigation. This method yields the bonus feature of estimating precise tracks for UAVs, which may be applicable for automatic collision avoidance. We cast the problem in a probabilistic framework known as modeling field theory (MFT), in which the pdf of the data is composed of a mixture of components, each conditional upon parameters including target positions as well as sensor kinematics. The most likely set of parameters is found by maximizing the log-likelihood function using an iterative approach related to expectation-maximization. In terms of computational complexity, this approach scales linearly with number of targets and sensors, which represents an improvement over most existing methods. Also, since data association is treated probabilistically, this method is not prone to catastrophic failure if data association is incorrect. Results from computer simulations are described which quantitatively show the advantages of increasing the number of sensors in the swarm, both in terms of clutter suppression and more accurate target localization. (C) 2005 Elsevier B.V. All rights reserved.
C1 USAF, SNHE, Bedford, MA 01731 USA.
RP Deming, RW (reprint author), USAF, SNHE, 80 Scott Dr, Bedford, MA 01731 USA.
EM ross.cleming@hanscom.af.mil
NR 44
TC 23
Z9 25
U1 1
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1566-2535
J9 INFORM FUSION
JI Inf. Fusion
PD JUL
PY 2007
VL 8
IS 3
BP 316
EP 330
DI 10.1016/j.inffus.2005.11.001
PG 15
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA 163PK
UT WOS:000246171900008
ER
PT J
AU Golden, PJ
Hutson, A
Sundaram, V
Arps, JH
AF Golden, Patrick J.
Hutson, Alisha
Sundaram, Vasan
Arps, James H.
TI Effect of surface treatments on fretting fatigue of Ti-6Al-4V
SO INTERNATIONAL JOURNAL OF FATIGUE
LA English
DT Article
DE fretting; fatigue; Ti-6Al-4V; coatings; laser shock processing; low
plasticity burnishing; residual stress
ID DIAMOND-LIKE CARBON; TI6AL4V INTERFACES; WEAR REGIMES; COATINGS;
TEMPERATURE; BEHAVIOR; DLC
AB The objective of this work was to investigate the performance of several coatings and surface treatments subjected to fretting fatigue with Ti-6Al-4V specimens and pads. Five coating systems were initially chosen and tested using two different fretting fatigue apparatus. The five coating systems considered were two types of Diamond Like Carbon (DLC), plasma sprayed molybdenum coating, electroless nickel-boron, and a plasma nitrided surface. In addition to the coatings, two surface treatments, Laser Shock Processing (LSP) and Low Plasticity Burnishing (LPB) were also considered both with and without coatings. Specimens with two of the best performing coatings were first subjected to LSP and LPB prior to coating application and then tested for fretting fatigue. These initial results show that the DLC coating significantly improves the fretting fatigue lives of the laboratory specimens.
C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
Univ Dayton, Res Inst, Dayton, OH 45469 USA.
Boeing Phantom Works, Seattle, WA 98124 USA.
SW Res Inst, San Antonio, TX 78238 USA.
RP Golden, PJ (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
EM patrick.golden@wpafb.af.mil
NR 25
TC 40
Z9 48
U1 5
U2 30
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0142-1123
J9 INT J FATIGUE
JI Int. J. Fatigue
PD JUL
PY 2007
VL 29
IS 7
BP 1302
EP 1310
DI 10.1016/j.ijfatigue.2006.10.005
PG 9
WC Engineering, Mechanical; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA 174PH
UT WOS:000246954200010
ER
PT J
AU White, ED
AF White, Edward D., III
TI Predicting energy expenditure for the ambulatory neurologically impaired
patient: A regression approach
SO INTERNATIONAL JOURNAL ON DISABILITY AND HUMAN DEVELOPMENT
LA English
DT Article
DE accelerometer; energy expenditure; linear regression; United States
ID TRIAXIAL ACCELEROMETER; PHYSICAL-ACTIVITY
AB Three-dimensional accelerometers have become popular in monitoring energy expended by patients who are ambulatory, but suffer from various neurological conditions. Because most of these devices use proprietary equations developed from young, healthy adults, who did not possess any type of mobility deficiency, the estimated energy expenditure from these models often must be adjusted for subjects with neurological deficiencies. This study collected data from volunteers and built a regression model that better accounted for energy expended for ambulatory patients suffering from multiple sclerosis, stroke, or Parkinson's disease. Gender, age, overall assessment of a subject's gait, and possibly a walking regime proved predictive in estimating calories expended in addition to the accelerometer raw data values.
C1 USAF, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA.
RP White, ED (reprint author), USAF, Inst Technol, Dept Math & Stat, 2950 Hobson Way,Bldg 641,WPAFB, Wright Patterson AFB, OH 45433 USA.
EM edward.white@afit.edu
NR 19
TC 0
Z9 0
U1 0
U2 1
PU FREUND PUBLISHING HOUSE LTD
PI TEL AVIV
PA PO BOX 35010, TEL AVIV 61350, ISRAEL
SN 1565-012X
J9 INT J DISABIL HUM DE
JI Int. J. Disabil. Hum. Dev.
PD JUL-SEP
PY 2007
VL 6
IS 3
BP 301
EP 308
PG 8
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 279YK
UT WOS:000254391600014
ER
PT J
AU Hochhalter, JD
Massarello, JJ
Maji, AK
Fuierer, PA
AF Hochhalter, Jake D.
Massarello, Jack J.
Maji, Arup K.
Fuierer, Paul A.
TI Quantifying the effects of curing parameters and composite
characteristics on fiber print-through
SO JOURNAL OF ADVANCED MATERIALS
LA English
DT Article
ID MIRRORS
AB One attractive technique to fabricating lightweight, optical quality surfaces for use in extreme environments is replication with advanced composite materials. The major hindrance to date has been the inability to completely mitigate the existence of a consequential surface undulation termed fiber print-through. Although successful mitigation of fiber print-through via a polished resin layer method has been proven, an additional resin layer reduces the heat transfer through the mirror thickness that would be necessary for high-energy laser applications and also carries structural disadvantages.
This research was completed to quantify the dominating causes of fiber print-through and its contribution to the total surface roughness of a composite (where total roughness includes the elements of print-through and other surface anomalies that contribute to diffuse reflection). Variables including fiber diameter, fiber type, resin type and cure temperature, and autoclaving pressure were investigated as possible sources of fiber print-through. The quantification of fiber print-through was measured via microscopic interferometry.
C1 USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
Univ New Mexico, Civil Engn Dept, Albuquerque, NM USA.
New Mexico Inst Min & Technol, Mat & Met Engn Dept, Socorro, NM USA.
RP Hochhalter, JD (reprint author), USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU SAMPE PUBLISHERS
PI COVINA
PA 1161 PARKVIEW DRIVE, COVINA, CA 91722 USA
SN 1070-9789
J9 J ADV MATER-COVINA
JI J. Adv. Mater.
PD JUL
PY 2007
VL 39
IS 3
BP 40
EP 48
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA 191LV
UT WOS:000248133600006
ER
PT J
AU Reich, G
Sanders, B
AF Reich, Gregory
Sanders, Brian
TI Introduction to morphing aircraft research
SO JOURNAL OF AIRCRAFT
LA English
DT Editorial Material
C1 USAF, Res Lab, Wright Patterson AFB, OH USA.
RP Reich, G (reprint author), USAF, Res Lab, Wright Patterson AFB, OH USA.
NR 0
TC 13
Z9 20
U1 1
U2 6
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
J9 J AIRCRAFT
JI J. Aircr.
PD JUL-AUG
PY 2007
VL 44
IS 4
BP 1059
EP 1059
DI 10.2514/1.28287
PG 1
WC Engineering, Aerospace
SC Engineering
GA 198LV
UT WOS:000248630500001
ER
PT J
AU Inoyama, D
Sanders, BP
Joo, JJ
AF Inoyama, Daisaku
Sanders, Brian P.
Joo, James J.
TI Topology synthesis of distributed actuation systems for morphing wing
structures
SO JOURNAL OF AIRCRAFT
LA English
DT Article
ID COMPLIANT MECHANISMS; DESIGN; OPTIMIZATION
AB This paper presents a novel topology optimization methodology for a synthesis of distributed actuation systems with specific applications to morphing air vehicle structures. The main emphasis is placed on the topology optimization problem formulation and the development of computational modeling concepts. The analysis model is developed to meet several important criteria: It must allow a large rigid-body displacement, as well as a variation in planform area, with minimum strain on structural members while retaining acceptable numerical stability for finite element analysis. For demonstration purposes, the in-plane morphing wing model is presented. Topology optimization is performed on a semiground structure with design variables that control the system configuration. In other words, the state of each element in the model is controlled by a corresponding design variable that, in turn, is determined through the optimization process. In effect, the optimization process assigns morphing members as soft elements, nonmorphing load-bearing members as stiff elements, and nonexistent members as "voids." The optimization process also determines the optimum actuator placement, where each actuator is represented computationally by equal and opposite nodal forces with soft axial stiffness. In addition, the configuration of attachments that connect the morphing structure (i.e., morphing wing) to a nonmorphing structure (i.e., fuselage) is determined simultaneously in the same process. Several different optimization problem formulations are investigated to understand their potential benefits in solution quality, as well as meaningfulness of the formulations. Sample in-plane morphing problems are solved to demonstrate the potential capability of the methodology introduced in this paper.
C1 Univ Dayton, Dayton, OH 45469 USA.
USAF, Res Lab, Wright Patterson AFB, OH USA.
Univ Dayton, Res Inst, Dayton, OH 45469 USA.
RP Inoyama, D (reprint author), Univ Dayton, Dayton, OH 45469 USA.
NR 17
TC 13
Z9 15
U1 2
U2 11
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
J9 J AIRCRAFT
JI J. Aircr.
PD JUL-AUG
PY 2007
VL 44
IS 4
BP 1205
EP 1213
DI 10.2514/1.25535
PG 9
WC Engineering, Aerospace
SC Engineering
GA 198LV
UT WOS:000248630500017
ER
PT J
AU Lee, HA
Kim, YI
Park, GJ
Kolonay, RM
Blair, M
Canfield, RA
AF Lee, H. A.
Kim, Y. I.
Park, G. J.
Kolonay, R. M.
Blair, M.
Canfield, R. A.
TI Structural optimization of a joined wing using equivalent static loads
SO JOURNAL OF AIRCRAFT
LA English
DT Article; Proceedings Paper
CT AIAA/ISSMO 11th Multidisciplinary Analysis and Optimization Conference
CY SEP 06-08, 2006
CL Portsmouth, VA
SP Amer Inst Aeronaut & Astronaut, ISSMO
ID DYNAMIC LOADS; GUST LOADS; DESIGN
AB The joined wing is anew concept of the airplane wing. The forewing and the aft wing are joined together in a joined wing. The range and loiter are longer than those of a conventional wing. The joined wing can lead to increased aerodynamic performance and reduction of the structural weight. In this research, dynamic response optimization of a joined wing is carried out by using equivalent static loads. Equivalent static loads are made to generate the same displacement field as that from dynamic loads at each time step of dynamic analysis. The gust loads are considered as critical loading conditions and they dynamically act on the structure of the aircraft. It is difficult to identify the exact gust-load profile; therefore, the dynamic loads are assumed to be a one-cosine function. Static response optimization is performed for the two cases: one uses the same design variable definition as dynamic response optimization, and the other uses the thicknesses of all elements as design variables; the results are then compared.
C1 Hanyang Univ, Dept Mech Engn, Ansan 425791, South Korea.
USAF, Res Lab, Dept Mech Engn, Wright Patterson AFB, OH 45433 USA.
USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Lee, HA (reprint author), Hanyang Univ, Dept Mech Engn, Ansan 425791, South Korea.
EM gjpark@hanyang.ac.kr
RI Canfield, Robert/C-1798-2012
OI Canfield, Robert/0000-0003-3679-2815
NR 21
TC 14
Z9 14
U1 5
U2 19
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0021-8669
J9 J AIRCRAFT
JI J. Aircr.
PD JUL-AUG
PY 2007
VL 44
IS 4
BP 1302
EP 1308
DI 10.2514/1.26869
PG 7
WC Engineering, Aerospace
SC Engineering
GA 198LV
UT WOS:000248630500027
ER
PT J
AU Hunt, RH
Tytgat, GH
Malfertheiner, P
Fock, KM
Heading, RC
Katelaris, PH
McCarthy, DM
McColl, KEL
Moss, SF
Sachs, G
Sontag, SJ
Thomson, ABR
Modlin, IM
AF Hunt, Richard H.
Tytgat, Guido H.
Malfertheiner, Peter
Fock, Kwong Ming
Heading, Robert C.
Katelaris, Peter H.
McCarthy, Denis M.
McColl, Kenneth E. L.
Moss, Steven F.
Sachs, George
Sontag, Stephen J.
Thomson, Alan B. R.
Modlin, Irvin M.
TI Whistler summary: "The slow rate of rapid progress"
SO JOURNAL OF CLINICAL GASTROENTEROLOGY
LA English
DT Editorial Material
ID GASTROESOPHAGEAL-REFLUX DISEASE; PROTON-PUMP INHIBITORS; ESOPHAGOGASTRIC
JUNCTION; BARRETTS-ESOPHAGUS; ACID SUPPRESSION; QUESTIONNAIRE;
ESOMEPRAZOLE; METAANALYSIS; DYSPEPSIA; CONSENSUS
AB Gastroesophageal reflux disease (GERD) is now the most common diagnosis made in gastroenterology outpatient practice. Increasing time and resources are spent on its management each year. Many conditions associated with, or the result of, GERD also appear to be on the rise-the most worrisome, esophageal adenocarcinoma, is steadily increasing in incidence, although it remains an uncommon cancer. Now that proton pump inhibitors (PPIs) are widely available, including over the counter in some countries, patients seen in consultation by gastroenterologists are becoming ever more challenging. In view of these trends, a meeting was convened in Whistler, British Columbia, Canada, in the fall of 2006 to review the current state-of-the-art approach to GERD, and to highlight areas of uncertainty in this field. The aim was to focus attention on patient needs, in an effort to provide better symptomatic care. The discussions were free ranging, on a variety of the most difficult problems, and the chairmen were instructed to lead the discussions into the unmet needs. The following pages highlight a summary of these discussions.
C1 Yale Univ, Sch Med, New Haven, CT 06520 USA.
McMaster Univ, Hlth Sci Ctr, Hamilton, ON, Canada.
Univ Alberta, Edmonton, AB, Canada.
Univ Amsterdam, Amsterdam, Netherlands.
Univ Magdeburg, D-39106 Magdeburg, Germany.
Changi Gen Hosp, Div Gastroenterol, Singapore, Singapore.
Glasgow Royal Infirm, Glasgow G4 0SF, Lanark, Scotland.
Univ Sydney, Concord Hosp, Sydney, NSW 2006, Australia.
Univ New Mexico, Albuquerque, NM 87131 USA.
USAF, Vet Affairs Med Ctr, Albuquerque, NM USA.
Western Infirm & Associated Hosp, Glasgow, Lanark, Scotland.
Rhode Isl Hosp, Providence, RI USA.
Brown Univ, Providence, RI 02912 USA.
Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA USA.
Vet Affairs Greater Los Angeles Healthcare Syst, Los Angeles, CA USA.
Vet Affairs Hosp, Hines, IL USA.
RP Modlin, IM (reprint author), Yale Univ, Sch Med, 333 Cedar St, New Haven, CT 06520 USA.
EM imodlin@optonline.net
NR 28
TC 2
Z9 2
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0192-0790
J9 J CLIN GASTROENTEROL
JI J. Clin. Gastroenterol.
PD JUL
PY 2007
VL 41
IS 6
BP 539
EP 545
DI 10.1097/MCG.0b013e31803d0fd8
PG 7
WC Gastroenterology & Hepatology
SC Gastroenterology & Hepatology
GA 187FU
UT WOS:000247833800001
PM 17577108
ER
PT J
AU Hunt, RH
Tytgat, GN
Malfertheiner, P
Fock, KM
Heading, RC
Katelaris, PH
McCarthy, DM
McColl, KE
Moss, SF
Sachs, G
Sontag, SJ
Thomson, ABR
Modlin, IM
AF Hunt, Richard H.
Tytgat, Guido N.
Malfertheiner, Peter
Fock, Kivong Ming
Heading, Robert C.
Katelaris, Peter H.
McCarthy, Denis M.
McColl, Kenneth El.
Moss, Steven F.
Sachs, George
Sontag, Stephen J.
Thomson, Allan B. R.
Modlin, Irvin M.
TI Whistler Consensus
SO JOURNAL OF CLINICAL GASTROENTEROLOGY
LA English
DT Article; Proceedings Paper
CT Meeting on Gastroesophageal Reflux Disease (GERD)
CY SEP, 2006
CL Whistler, CANADA
DE acid; PPI; esophagus; reflux
ID GASTROESOPHAGEAL-REFLUX DISEASE; HEALTHY MALE-VOLUNTEERS; ACID
SUPPRESSION; QUESTIONNAIRE; ESOMEPRAZOLE; METAANALYSIS; PPI
AB There is a continuing increase in gastroesophageal reflux disease (GERD), its diverse manifestations and complications worldwide. Indeed the substantial increase in Asia remains is a major epidemiologic and a developing health care issue. This manifesto provides a contemporary review of the current status of areas of uncertainty and in particular highlights the lack of knowledge and unmet needs in the field of GERD biology and especially management. There seems to be no widely accepted rationale for the increasing incidence and prevalence of GERD globally. Although consideration has been given to the decline in Helicobacter pylori infection, others consider the steadily growing problem of obesity as the most likely etiologic factor. What actually comprises the disease entity of GERD continues to confound physicians, and the steady increase in new definitions suggests that a clear picture is still emerging. Of note, however, is the rising awareness of its protean systemic manifestations and the fact that while erosive reflux disease is easily recognizable endoscopically, nonerosive disease (NERD) comprises the majority of presentations in many populations. In view of this, GERD-specific questionnaires and other evaluative tools have been designed to capture the multidimensional nature of the symptom complexes in GERD patients who for the most part may have no endoscopic evidence of disease. Such tools have obvious utility in the evaluation of changes with treatment, especially because there is no endoscopic abnormality detectable. The recognition that NERD is becoming a major clinical entity that requires substantial further investigation is now clearly apparent. At this time, however, little is known of the cellular barrier mechanisms of the esophagus and what is responsible for their reconstitution after injury. Similarly, the neural basis of esophageal pain appreciation, or its relation to the visceral sensory mechanisms that may link NERD with aspects of functional bowel disease are as yet ill understood. Apart from the clinical concern with symptom-focused issues, it is the specter of Barrett esophagus, the most-feared complication of GERD that mostly continues to drive endoscopic practice in GERD. At this time, however, current surveillance strategies remain severely limited in their ability to adequately detect or prevent most esophageal adenocarcinoma. Although considerable effort has been directed at defining the neural circuitry of the esophagus in terms of both motility and sensation, the topography and function of the esophageal-brain-gut axis in respect of the generation of esophageal symptoms remains terra incognita. At this time therefore acid suppression remains the mainstay of therapy in terms of treating the GERD/NERD disease process. Despite the efficacy of the currently available proton pump inhibitor class of drugs, there are clearly unmet needs in this area and agents with a more rapid onset of action and prolonged effect, particularly at night remain important goals in the future advance of pharmacotherapy.
C1 Yale Univ, Sch Med, New Haven, CT 06520 USA.
McMaster Univ, Hlth Sci Ctr, Hamilton, ON, Canada.
Univ Amsterdam, Amsterdam, Netherlands.
Otto Von Guericke Univ, Magdeburg, Germany.
Changi Gen Hosp, Div Gastroenterol, Singapore, Singapore.
Glasgow Royal Infirm, Glasgow, Lanark, Scotland.
Univ Sydney, Concord Hosp, Sydney, NSW 2006, Australia.
Univ New Mexico, Albuquerque, NM USA.
USAF, Vet Affairs Med Ctr, Albuquerque, NM USA.
Western Infirm & Associated Hosp, Glasgow, Lanark, Scotland.
Rhode Isl Hosp, Providence, RI USA.
Brown Univ, Providence, RI 02912 USA.
Univ Calif Los Angeles, David Gaffen Sch Med, Los Angeles, CA USA.
Vet Affairs Greater Los Angeles Healthcare Syst G, Los Angeles, CA USA.
Vet Affairs Hosp, Hines, IL USA.
Univ Alberta, Edmonton, AB, Canada.
RP Modlin, IM (reprint author), Yale Univ, Sch Med, 333 Cedar St, New Haven, CT 06520 USA.
EM imodlin@optonline.net
NR 16
TC 1
Z9 1
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0192-0790
J9 J CLIN GASTROENTEROL
JI J. Clin. Gastroenterol.
PD JUL
PY 2007
VL 41
IS 6
SU S
BP S47
EP S50
DI 10.1097/MCG.0b013e318064c7a3
PG 4
WC Gastroenterology & Hepatology
SC Gastroenterology & Hepatology
GA 188RW
UT WOS:000247938000002
ER
PT J
AU Jones, MS
Lukashov, VV
Ganac, RD
Schnurr, DP
AF Jones, Morris S.
Lukashov, Vladimir V.
Ganac, Robert D.
Schnurr, David P.
TI Discovery of a novel human picornavirus in a stool sample from a
pediatric patient presenting with fever of unknown origin
SO JOURNAL OF CLINICAL MICROBIOLOGY
LA English
DT Article
ID ENCEPHALOMYOCARDITIS-VIRUS-INFECTION; THEILERS VIRUS; VILYUISK VIRUS;
POLY(C) TRACT; PIGS; TRANSMISSION; PERSISTENT; ELEPHANTS; MACAQUES;
GENETICS
AB Fever of unknown origin (FUO) is a serious problem in the United States. An unidentified agent was cultured from the stool of an infant who presented with FUO. This virus showed growth in HFDK cells and suckling mice. Using DNase sequence-independent single-primer amplification, we identified several nucleotide sequences with a high homology to Theiler's murine encephalomyelitis virus. Nearly full-length viral genome sequencing and phylogenetic analysis demonstrate that this virus is a member of the Cardiovirus genus of the Picornaviridae family.
C1 David Grant USAF Med Ctr, Clin Invest Facil, Travis AFB, CA 94535 USA.
Calif Dept Hlth Serv, Viral & Rickettsial Dis Lab, Richmond, CA 94804 USA.
Univ Amsterdam, Acad Med Ctr, Ctr Infect & Immun Amsterdam, Dept Med Microbiol,Lab Expt Virol, NL-1105 AZ Amsterdam, Netherlands.
Russian Acad Med Sci, DI Ivanovskii Virol Inst, Moscow 123098, Russia.
RP Jones, MS (reprint author), David Grant USAF Med Ctr, Clin Invest Facil, 101 Bodin Circle, Travis AFB, CA 94535 USA.
EM drmorrisj@yahoo.com
NR 25
TC 117
Z9 123
U1 0
U2 2
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0095-1137
J9 J CLIN MICROBIOL
JI J. Clin. Microbiol.
PD JUL
PY 2007
VL 45
IS 7
BP 2144
EP 2150
DI 10.1128/JCM.00174-07
PG 7
WC Microbiology
SC Microbiology
GA 190QB
UT WOS:000248072900008
PM 17460053
ER
PT J
AU Holt, DM
Waus, JD
Beeson, TJ
Kirkpatrick, TC
Rutledge, RE
AF Holt, Dennis M.
Waus, J. Dustin
Beeson, Thomas J.
Kirkpatrick, Timothy C.
Rutledge, Richard E.
TI The anti-microbial effect against enterocloccus faecalis and the
compressive strength of two types of mineral trioxide aggregate mixed
with sterile water or 2% chlorhexidine liquid
SO JOURNAL OF ENDODONTICS
LA English
DT Article
DE anti-microbial; chlorhexidine; compressive strength; Enterococcus
faecalis; mineral trioxide aggregate
ID END FILLING MATERIALS; MTA; 0.12-PERCENT; DENTIN
AB The purpose of this in vitro study was 2-fold: First, to compare the antimicrobial effect of gray and tooth-colored mineral trioxide aggregate (MTA) when mixed with sterile water or 2% chlorhexidine. Second, to compare the compressive strengths of the MTA/chlorhexidine versus MTA/sterile water samples. The antimicrobial effect test was accomplished by placing freshly mixed MTA samples on agar plates inoculated with Enterococcus faecalis and comparing the zones of inhibition at 24 hours. In the compressive strength test, MTA pellets were allowed to set for 72 hours and then compressed to fracture by using an Instron testing machine. Values were recorded and compared. In the antimicrobial effect experiment, the zones of inhibition were significantly larger for samples mixed with 2% chlorhexidine. In the compressive strength study, statistical evaluation showed no significance due to variability. However, data revealed that MTA mixed with sterile water always had higher compressive strengths than MTA mixed with chlorhexidine.
C1 Wilford Hall USAF Med Ctr, Dept Endodont, Lackland AFB, TX 78236 USA.
Creighton Univ, Sch Dent, Dept Endodont, Omaha, NE 68178 USA.
RP Kirkpatrick, TC (reprint author), Wilford Hall USAF Med Ctr, Dept Endodont, 2450 Pepperrell St, Lackland AFB, TX 78236 USA.
EM timothy.kirkpatrick@lackland.af.mil
NR 23
TC 32
Z9 35
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0099-2399
J9 J ENDODONT
JI J. Endod.
PD JUL
PY 2007
VL 33
IS 7
BP 844
EP 847
DI 10.1016/j.joen.2007.04.006
PG 4
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 186EY
UT WOS:000247763100016
PM 17804326
ER
PT J
AU Cruse, TA
Brown, JM
AF Cruse, Thomas A.
Brown, Jeffrey M.
TI Confidence interval simulation for systems of random variables
SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE
ASME
LA English
DT Article
AB Bayesian network models are seen as important tools in probabilistic design assessment for complex systems. Such network models for system reliability analysis provide a single probability of failure value whether the experimental data used to model the random variables in the problem are perfectly known or derive from limited experimental data. The values of the probability of failure for each of those two cases are not the same, of course, but the point is that there is no way to derive a Bayesian type of confidence interval from such reliability network models. Bayesian confidence (or belief) intervals for a probability of failure are needed for complex system problems in order to extract information on which random variables are dominant, not just for the expected probability of failure but also for some upper bound, such as for a 95% confidence upper bound. We believe that such confidence bounds on the probability of failure will be needed for certifying turbine engine components and systems based on probabilistic design methods. This paper reports on a proposed use of a two-step Bayesian network modeling strategy that provides a full cumulative distribution function for the probability of failure, conditioned by the experimental evidence for the selected random variables. The example is based on a hypothetical high-cycle fatigue design problem for a transport aircraft engine application.
C1 AF Res Lab, Wright Patterson AFB, OH 45463 USA.
AF Res Lab, Propuls Directorate, Wright Patterson AFB, OH 45463 USA.
RP Cruse, TA (reprint author), AF Res Lab, Wright Patterson AFB, OH 45463 USA.
EM Thomas.Cruse@wpafb.af.mil; Jeffrey.Brown@wpafb.af.mil
NR 5
TC 7
Z9 7
U1 0
U2 1
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 JUL
PY 2007
VL 129
IS 3
BP 836
EP 842
DI 10.1115/1.2718217
PG 7
WC Engineering, Mechanical
SC Engineering
GA 194QJ
UT WOS:000248358600026
ER
PT J
AU Turner, TJ
Miller, MP
AF Turner, T. J.
Miller, M. P.
TI Modeling the influence of material structure on deformation induced
surface roughening in AA7050 thick plate
SO JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME
LA English
DT Article
DE characterization; spatial gradients; polycrystal plasticity; texture;
aluminum plate; multi-scale modeling
ID POLYCRYSTAL PLASTICITY; LIMIT STRAINS; SHEET; METHODOLOGY; ORIENTATION;
METAL
AB A methodology for incorporating a description of material structure into a finite element formulation is presented. This work describes an experiment/simulation - based methodology for characterizing attributes of material structure, and then incorporating those attributes into a modeling frame work. The modeling framework was used to study the development of deformation induced surface roughening in thin sheets machined from? AA 7050 thick plate. Predicting this roughening phenomenon necessitates the quantification and representation of material structure and processes that exist over several size scales. Electron backscatter diffraction experiments were used for material structure characterization, which included crystallographic texture, distributions in grain sizes, and a distribution in intragrain misorientation. These distributions in structure were incorporated in digital microstructures which represented virtual specimens composed of finite element-discretized crystals. A continuum slip-poly,crystal plasticity model was coupled with the digital microstructures to study the differences in roughening seen in specimens deformed along the rolling direction and transverse direction of the plate material. The success of these simulations build additional insight into how to incorporate material structure into deformation simulations, and build representative virtual specimens that can be used to study the complicated processes that underlie deformation mechanics in polycrystalline materials.
C1 AF Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
Cornell Univ, Sibley Sch Mech & Aerosp Engn, Ithaca, NY 14853 USA.
RP Turner, TJ (reprint author), AF Res Lab, Mat & Mfg Directorate, 2230 10th St, Wright Patterson AFB, OH 45433 USA.
NR 23
TC 6
Z9 6
U1 3
U2 3
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0094-4289
J9 J ENG MATER-T ASME
JI J. Eng. Mater. Technol.-Trans. ASME
PD JUL
PY 2007
VL 129
IS 3
BP 367
EP 379
DI 10.1115/1.2744395
PG 13
WC Engineering, Mechanical; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA 191CP
UT WOS:000248107700003
ER
PT J
AU Crownover, BK
Curtiss, FR
AF Crownover, Brian K.
Curtiss, Frederic R.
TI Need to revisit step therapy for ARBs - The editors respond
SO JOURNAL OF MANAGED CARE PHARMACY
LA English
DT Letter
C1 USAF, MC, Washington, DC 20330 USA.
RP Crownover, BK (reprint author), USAF, MC, Washington, DC 20330 USA.
EM bkcrown@hotmail.com; _fcurtiss@amcp.org
NR 11
TC 0
Z9 0
U1 0
U2 0
PU ACAD MANAGED CARE PHARMACY
PI ALEXANDRIA
PA 100 N PITT ST, 400, ALEXANDRIA, VA 22314-3134 USA
SN 1083-4087
J9 J MANAGE CARE PHARM
JI J. Manag. Care Pharm.
PD JUL-AUG
PY 2007
VL 13
IS 6
BP 529
EP 531
PG 3
WC Health Care Sciences & Services; Pharmacology & Pharmacy
SC Health Care Sciences & Services; Pharmacology & Pharmacy
GA 198UR
UT WOS:000248653500009
ER
PT J
AU Ochoa, E
Starman, L
Bedford, R
Nelson, T
Ehret, J
Harvey, M
Anderson, T
Ren, F
AF Ochoa, Edward
Starman, LaVern
Bedford, Robert
Nelson, Thomas
Ehret, James
Harvey, Michael
Anderson, Travis
Ren, Fan
TI Flip bonding with SU-8 for hybrid AlxGa1-xAs-polysilicon MEMs-tunable
filter
SO JOURNAL OF MICRO-NANOLITHOGRAPHY MEMS AND MOEMS
LA English
DT Article
DE SU-8; hybrid; microelectromechanical; tunable filter; flip bond; AlGaAs;
distributed Bragg reflectors; polysilicon; hydrofluoric acid; optical
tuning
ID VCSEL
AB We report the influence of bonding temperature on SU-8 to SU-8 bonding and report fabrication of a hybrid microelectromechanicaltunable filter (MEM-TF) using SU-8 bond pads. We demonstrate use of 2-mu m-thick 50 x 50-mu m(2) SU-8 bond pads to attach 4.92-mu m-thick 250 x 250-mu m(2) Al0.4Ga0.6As-GaAs distributed Bragg reflectors (DBR) to polysilicon MUMPs((R)) piston actuators. Advantages of this process include compatibility with hydrofluoric-acid-release chemistry, lowtemperature/ low-pressure bonding, simple bond-pad photolithography, 57% flip-bonded DBR yield, and 30% electrostatically actuatable hybrid MEM-TF yield. (C) 2007 Society of Photo-Optical Instrumentation Engineers.
C1 USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
USAF, Res Lab Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
USAF Space & Missile Syst Ctr, Wright Patterson AFB, OH 45433 USA.
Univ Florida, Gainesville, FL 32611 USA.
RP Ochoa, E (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
EM Edward.Ochoa@earthlink.net
NR 9
TC 2
Z9 2
U1 1
U2 5
PU SPIE-SOC PHOTOPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 1537-1646
J9 J MICRO-NANOLITH MEM
JI J. Micro-Nanolithogr. MEMS MOEMS
PD JUL-SEP
PY 2007
VL 6
IS 3
AR 033007
DI 10.1117/1.2767326
PG 4
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Materials Science, Multidisciplinary; Optics
SC Engineering; Science & Technology - Other Topics; Materials Science;
Optics
GA 225WZ
UT WOS:000250550200019
ER
PT J
AU Slagley, JM
Guffey, S
AF Slagley, Jeremy M.
Guffey, Steven
TI Effects of cross-sectional dimensions on active noise control in
rectangular and round ducts
SO JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE
LA English
DT Article
DE active noise control; duct diameter; engineering noise control; noise
cancellation
AB Active noise control (ANC) works best to reduce low frequency noise. Because many industrial noise sources are broadband, ANC may be used more if it can be successfully applied to higher frequency ranges. This study explored one method to increase ANC effectiveness at higher frequencies. ANC is particularly useful in hard-walled ducts where plane waves propagate. Higher order mode waves are much more difficult to control. Basic acoustic principles dictate that the cut-on frequency at which higher order modes will first begin to eclipse simple plane waves in a duct will be determined by the cross-sectional geometry of the duct. The lowest frequency for higher order modes increases as duct diameter decreases; therefore the range of frequencies where plane waves dominate will be greater and effective control using ANC will be better as duct diameter decreases. The result is that somewhat higher frequencies can be controlled with ANC for smaller diameters. Below the first higher order mode cut-on frequency for the largest size studied, there should be little difference in ANC effectiveness between the duct sizes. To test those suppositions, a commercially available ANC system was used to reduce random noise in rectangular and round ducts having different diameters. Results showed that insertion loss (IL) ranged from 5 dB to 29 dB in frequencies ranging from 40-1000 Hz and varied inversely with cross-sectional size as expected. There was no difference in IL below Hz (p=0.7751) between the different diameter ducts. There was a significant difference between duct diameters above 280 Hz (p<0.0001). The same tests were conducted on a rectangular duct with one cross-sectional dimension fixed and one varied at seven different sizes. Results showed similar IL from 5 dB to 29 dB that varied inversely with size.
C1 USAF, Inst Technol Syst & Engn Management, AFIT, ENV, Wright Patterson AFB, OH 45433 USA.
W Virginia Univ, Morgantown, WV 26506 USA.
RP Slagley, JM (reprint author), USAF, Inst Technol Syst & Engn Management, AFIT, ENV, Bldg 640,2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM jeremy.slagley@afit.edu
NR 15
TC 1
Z9 1
U1 0
U2 0
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1545-9624
J9 J OCCUP ENVIRON HYG
JI J. Occup. Environ. Hyg.
PD JUL
PY 2007
VL 4
IS 7
BP 492
EP 501
DI 10.1080/15459620701398942
PG 10
WC Environmental Sciences; Public, Environmental & Occupational Health
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health
GA 179TI
UT WOS:000247312600005
PM 17503294
ER
PT J
AU Szmulowicz, F
AF Szmulowicz, Frank
TI Complete photonic band structure in a single step
SO JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
LA English
DT Article
DE photonic crystal; photonic band structure; multi-layer; explicit
solution; tangent formulation
ID CRYSTALS
AB This paper establishes a new analytical and computational framework for explicit calculations of the complete photonic band structure for the important class of layered photonic band gap ( PBG) materials with integral ratios of optical path lengths, L-i, for layers 1 <= i <= N, that is, PBGs with L-i/L-j = m/n, where m and n are integers, a class comprising any combination of fractional-wave layers such as half-wave, quarter-wave, etc stacks. Instead of an implicit root search required in the transfer matrix method, the present method entails a single diagonalization of a Hermitian generalized eigenvalue problem derived here. An earlier paper by the author (Szmulowicz 2007 J. Opt. A: Pure Appl. Opt. 9 301-7) presented explicit solutions for the specialized cases of the centre and the edge of the Brillouin zone. The formalism is illustrated on the examples of a half-wave/quarter-wave/eighth-wave and a half-wave/third-wave/sixth-wave PBG.
C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Szmulowicz, F (reprint author), Univ Dayton, Res Inst, 300 Coll Pk Ave, Dayton, OH 45469 USA.
EM Frank.Szmulowicz@wpafb.af.mil
NR 15
TC 2
Z9 2
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1464-4258
J9 J OPT A-PURE APPL OP
JI J. Opt. A-Pure Appl. Opt.
PD JUL
PY 2007
VL 9
IS 7
BP 761
EP 766
DI 10.1088/1464-4258/9/7/032
PG 6
WC Optics
SC Optics
GA 188NC
UT WOS:000247925600033
ER
PT J
AU Freiberger, JJ
Padilla-Burgos, R
Chhoeu, AH
Kraft, KH
Boneta, O
Moon, RE
Piantadosi, CA
AF Freiberger, John J.
Padilla-Burgos, Rebecca
Chhoeu, Austin H.
Kraft, Kevin H.
Boneta, Otto
Moon, R. E.
Piantadosi, C. A.
TI Hyperbaric oxygen treatment and bisphosphonate-induced osteonecrosis of
the jaw: A case series
SO JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY
LA English
DT Article
ID RISK-FACTORS; OSTEOCLASTS
AB Purpose: Bisphosphonate (BP)-associated osteonecrosis of the jaw (ONJ) is an emerging problem with few therapeutic options. Our pilot study of BP-ONJ investigated a possible role for hyperbaric oxygen (HBO2) therapy.
Patients and Methods: A total of 16 patients, ranging in age from 43 to 78 years, with BP-ONJ were treated with adjunctive HBO2 between July 2003 and April 2006. Staging was based on the size and number of oral lesions. Clinical response after treatment and at distant follow-up; the odds of remission, stabilization, or relapse; and time to failure analysis were calculated.
Results: The median time on BP therapy before appearance of ONJ symptoms was 18 months, and that from symptom onset to HBO2 therapy was 12 months. Fourteen of 16 patients (87.5%) improved in stage. The size and number of ONJ lesions were decreased after HBO2 therapy (P <.001 and P =.008, respectively; Wilcoxon signed-rank test). Immediately after HBO2 therapy, 7 of 16 patients (44%) were in remission and 8 (50%) had stabilized; however, stabilization without remission was sustained in only 2 patients. At follow-up, 10 of the patients (62.5%) were still in remission or had stabilized. The 7 patients who continued on BP treatment during HBO2 therapy had a shorter time to failure (8.5 months; 95% confidence interval [CI] = 7.1 to 9.8) than those who discontinued the drug (20.1 months; 95% CI = 17.5 to 23.9; P =.006 by the log-rank test). Clinical response was not associated with cancer type or malignancy remission status.
Conclusions: Adjunctive HBO2 therapy may benefit patients with BP-ONJ; however, the outcome is improved with cessation of BP administration. (c) 2007 American Association of Oral and Maxillofacial Surgeons.
C1 Duke Univ, Med Ctr, Ctr Hyperbar Med & Environm Physiol, Dept Anesthesiol, Durham, NC 27710 USA.
Dwight D Eisenhower Army Med Ctr, Dept Surg, Ft Gordon, GA USA.
USAF, Sch Aerosp Med, Hyperbar Med Div, San Antonio, TX USA.
RP Freiberger, JJ (reprint author), Duke Univ, Med Ctr, Ctr Hyperbar Med & Environm Physiol, Dept Anesthesiol, Box 3823, Durham, NC 27710 USA.
EM freib002@mc.duke.edu
NR 21
TC 66
Z9 69
U1 1
U2 2
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 0278-2391
J9 J ORAL MAXIL SURG
JI J. Oral Maxillofac. Surg.
PD JUL
PY 2007
VL 65
IS 7
BP 1321
EP 1327
DI 10.1016/j.joms.2007.03.019
PG 7
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 185YD
UT WOS:000247745400010
PM 17577496
ER
PT J
AU Johnson, CE
Fallis, S
Chafin, AP
Groshens, TJ
Higa, KT
Ismail, IMK
Hawkins, TW
AF Johnson, Curtis E.
Fallis, Stephen
Chafin, Andrew P.
Groshens, Thomas J.
Higa, Kelvin T.
Ismail, Ismail M. K.
Hawkins, Tom W.
TI Characterization of nanometer- to micron-sized aluminum powders: Size
distribution from thermogravimetric analysis
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article
ID NANOPOWDER COMPOSITIONS; OXIDATION BEHAVIOR; METAL POWDERS; WATER-VAPOR;
NANOPARTICLES; PASSIVATION; COMBUSTION; REACTIVITY; EXPLOSION; PARTICLES
AB Thermogravimetric analysis was used to study the reactivity of aluminum powders in air, oxygen, and nitrogen. In addition, the data were used to characterize active Al content, Al oxide content, volatile impurity content, particle size, and particle size distribution. Weight gains from complete oxidation of the Al were used to calculate average particle sizes in the range of 30 to 500 nm. These particle sizes correlated well with particle sizes derived from surface area measurement. Particle size was also examined by scanning electron microscopy, and compared with crystallite size determined by x-ray diffraction. Particle size distributions were derived from thermogravimetric analysis data based on a model of uniform oxidation of Al from the exterior to the interior of the particle. The method is well suited for analyzing samples with broad particle size distributions, and in particular, for monitoring the presence of 5005000 nm particles within nominally nanosized samples. Quantitative information was not obtained for particles around 100 nm or smaller, due to large variations in oxidation behavior below 700 degrees C. Nitridation of Al powders was studied for extended times at 600 degrees C. Surprisingly, 2 mu m powder was nearly completely nitrided in 1 h, indicating that the nitride product has little inhibiting effect on the reaction.
C1 USN, Air Syst Command, Chem & Mat Div, China Lake, CA 93555 USA.
USAF, Res Lab, Propuls Directorate, Space & Missile Div,Propellant Branch, Edwards AFB, CA 93524 USA.
RP Johnson, CE (reprint author), USN, Air Syst Command, Chem & Mat Div, Code 498200D,1900 N Knox Rd,Stop 6303, China Lake, CA 93555 USA.
NR 54
TC 11
Z9 12
U1 2
U2 13
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
J9 J PROPUL POWER
JI J. Propul. Power
PD JUL-AUG
PY 2007
VL 23
IS 4
BP 669
EP 682
DI 10.2514/1.25517
PG 14
WC Engineering, Aerospace
SC Engineering
GA 190QC
UT WOS:000248073000005
ER
PT J
AU Helfrich, TM
King, PI
Hoke, JL
Schauer, FR
AF Helfrich, Timothy M.
King, Paul I.
Hoke, John L.
Schauer, Frederick R.
TI Effect of supercritical fuel injection on cycle performance of pulsed
detonation engine
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article; Proceedings Paper
CT AIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference
CY JUL 09-12, 2006
CL Sacramento, CA
SP AIAA, ASME, SAE, ASEE
ID MIXTURES; AIR; PROPULSION; PRESSURES; FRONT
AB Pulsed detonation engines produce impulsive thrust through rapid ignition and formation of detonation waves. An operational goal is a reduction in time for the formation of detonation waves in conjunction with low-vapor-pressure liquid hydrocarbons. This study focuses on pulsed detonation engine operation enhancements using dual-detonation-tube, concentric-counterflow heat exchangers to elevate liquid hydrocarbon fuel temperatures up to supercritical levels. Variation of operating parameters includes fuel type (JP-8, JP-7, JP-10, RP-1, JP-900, and S-8) and firing frequency. Of interest is the effect on ignition time, deflagration to detonation transition time, detonation distance, and the percent of ignitions resulting in a detonation (detonation percentage). Except for JP-10, results for all fuels with increasing fuel injection temperatures indicate decreases in deflagration to detonation transition time by up to 15%, decreases in detonation distance by up to 30%, increases in the detonation percentage by up to 180%, and minimal impact on ignition time. JP-10 is difficult to detonate and results are inconsistent. An increase in firing frequency results in a 5 % decrease in deflagration to detonation transition time at high fuel injection temperatures, but has little effect on ignition time and detonation distance.
C1 USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
Onnovat Sci Solut Inc, Dayton, OH 45440 USA.
USAF, Res Lab, PRTC, Wright Patterson AFB, OH 45433 USA.
RP Helfrich, TM (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
NR 32
TC 10
Z9 12
U1 1
U2 10
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
J9 J PROPUL POWER
JI J. Propul. Power
PD JUL-AUG
PY 2007
VL 23
IS 4
BP 748
EP 755
DI 10.2514/1.26551
PG 8
WC Engineering, Aerospace
SC Engineering
GA 190QC
UT WOS:000248073000015
ER
PT J
AU Beal, BE
Gallimore, AD
Hargus, WA
AF Beal, Brian E.
Gallimore, Alec D.
Hargus, William A., Jr.
TI Effects of cathode configuration on Hall thruster cluster plume
properties
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article; Proceedings Paper
CT AIAA/ASME/SAE/ASEE 41st Joint Propulsion Conference
CY JUL 10-13, 2005
CL Tucson, AZ
SP AIAA, ASME, SAE, ASEE
ID CLOSED-DRIFT THRUSTERS; EMISSIVE PROBES; TRIPLE PROBE; PLASMA
AB Clusters of Hall thrusters may be used to produce electric propulsion systems capable of operating at power levels in excess of the current state of the art. One of the key factors to be considered in determining the optimum cluster architecture is the configuration of the electron-emitting cathode(s). This work presents experimentally determined plume properties and discharge current characteristics obtained with multiple thrusters coupled to a single cathode. Spatially resolved plasma density, electron temperature, and plasma potential data are presented during both single-thruster and cluster operation. Measurements taken in this configuration are compared with previously published data obtained with each thruster coupled to its own independent cathode. Critical plasma parameters in the cluster plume are shown to be strongly influenced by the location of the hollow cathode.
C1 USAF, Res Lab, Spacecraft Propuls Branch, Edwards AFB, CA 93524 USA.
Univ Michigan, Plasmadynam & Elect Propuls Lab, Ann Arbor, MI 48109 USA.
RP Beal, BE (reprint author), USAF, Res Lab, Spacecraft Propuls Branch, Edwards AFB, CA 93524 USA.
EM brian.beal@edwards.af.mil
NR 21
TC 2
Z9 3
U1 0
U2 4
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
J9 J PROPUL POWER
JI J. Propul. Power
PD JUL-AUG
PY 2007
VL 23
IS 4
BP 836
EP 844
DI 10.2514/1.24636
PG 9
WC Engineering, Aerospace
SC Engineering
GA 190QC
UT WOS:000248073000026
ER
PT J
AU Athwal, GS
Sperling, JW
Rispoli, DM
Cofield, RH
AF Athwal, George S.
Sperling, John W.
Rispoli, Damian M.
Cofield, Robert H.
TI Acute deep infection after surgical fixation of proximal humeral
fractures
SO JOURNAL OF SHOULDER AND ELBOW SURGERY
LA English
DT Article
ID ROTATOR CUFF REPAIR; DISLOCATIONS; MANAGEMENT
AB Acute deep infection after open reduction-internal fixation of proximal humeral fractures is uncommon. Currently, there are no reported series on the outcomes of patients treated for infection after surgery for proximal humeral fractures. The purpose of this study was to review the frequency, clinical presentation, bacteriology, treatment, and outcomes of patients with such fractures complicated by acute deep infection. Between 1993 and 2003, 5 patients with acute deep infection after open reduction-internal fixation of proximal humeral fractures were identified. The medical records, laboratory data, and radiographs were examined retrospectively. The mean age at the time of infection diagnosis was 50 years (range, 33-82 years), and the mean interval from proximal humeral fracture fixation to the time of infection diagnosis was 27 days (range, 14-40 days). All patients were available for final follow-up evaluation at a mean of 6.4 years (range, 32 months to 8.3 years). Of the 5 patients, 4 (80%) went on to nonunion requiring revision surgery. Coagulase-negative Staphylococcus species and Propionibacterium acnes were the most common organisms isolated. A mean of 3.3 surgical debridements were necessary for the eradication of infection. At a mean final follow-up of 6.4 years, the American Shoulder and Elbow Surgeons score averaged 53 points (range, 33-75 points) and the Simple Shoulder Test score averaged 6.2 points (range, 1 - 10 points). Acute deep infection after open reduction-internal fixation of proximal humeral fractures is a devastating complication. Patients should be counseled that the results of treatment of deep infection are plagued with high complication rates, poor functional outcome, and a notably high nonunion rate.
C1 Univ Western Ontario, Hand & Upper Limb Ctr, St Josephs Hlth Ctr, London, ON, Canada.
Mayo Clin, Dept Orthopaed Surg, Rochester, MN USA.
Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA.
RP Sperling, JW (reprint author), Mayo Clin, 200 First St SW, Rochester, MN 55905 USA.
EM sperling.john@mayo.edu
NR 16
TC 16
Z9 16
U1 0
U2 0
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1058-2746
J9 J SHOULDER ELB SURG
JI J. Shoulder Elbow Surg.
PD JUL-AUG
PY 2007
VL 16
IS 4
BP 408
EP 412
DI 10.1016/j.jse.2006.09.021
PG 5
WC Orthopedics; Sport Sciences; Surgery
SC Orthopedics; Sport Sciences; Surgery
GA 198WG
UT WOS:000248657600005
PM 17448697
ER
PT J
AU Hall, DT
Africano, JL
Lambert, JV
Kervin, PW
AF Hall, Doyle T.
Africano, John L.
Lambert, John V.
Kervin, Paul W.
TI Time-resolved I-band photometry of calibration spheres and NaK droplets
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article
ID ORBITAL DEBRIS POPULATION; SYSTEM
AB We have developed a program to obtain photometry of Earth-orbiting satellites using the U.S. Air Force advanced electrooptical system 3.6 m telescope's Visible Imager instrument, which acquires time-series charge-coupled device images at typical rates of 0.1 to 2.1 Hz. Observations of 12 spherical satellites provide measurements of I-band albedos (i.e., reflectances) and evaluation of surface nonuniformities. Best-fit specular + diffuse albedo models enable brightness predictions and a means to grade the quality of the spheres as photometric calibration reference objects. CalSphere-4A appears to be the highest quality calibrator of the 12, with the best-fit model reproducing 90% of the measurements to within +/- 0.03 stellar magnitudes. This four-decade-old sphere reflects in a predominantly diffuse fashion and has a total albedo of approximate to 67% that is somewhat lower than expected for fresh white paint, effects likely due to space weathering. The aluminum Lincoln Calibration Sphere-1 shows predominantly specular reflection (albedos approximate to 59%) but with +/- 0.3 magnitude deviations between data and model that recur every 30-90 s, likely due to one or more surface irregularities. Three other predominantly specular aluminum spheres display less frequent but larger amplitude deviations. Observations indicate that sodium/potassium droplets leaked from Soviet radar ocean reconnaissance satellite reactors are highly reflective specular spheres that can also serve as optical calibrators.
C1 Boeing Co, Colorado Springs, CO 80919 USA.
USAF, Res Lab, Directed Energy Directorate, Kihei, HI 96753 USA.
RP Hall, DT (reprint author), Boeing Co, 5555 Tech Ctr Dr,Suite 400,Mail Code 846-R01F, Colorado Springs, CO 80919 USA.
NR 19
TC 8
Z9 8
U1 0
U2 0
PU AMER INST AERONAUTICS ASTRONAUTICS
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
EI 1533-6794
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD JUL-AUG
PY 2007
VL 44
IS 4
BP 910
EP 919
DI 10.2514/1.27464
PG 10
WC Engineering, Aerospace
SC Engineering
GA 197JJ
UT WOS:000248550700018
ER
PT J
AU Shepherd, MJ
Cobb, RG
Peterson, GA
Palazotto, AN
AF Shepherd, Michael J.
Cobb, Richard G.
Peterson, Gina A.
Palazotto, Anthony N.
TI Quasi-static optics-based surface control of an in-plane actuated
membrane mirror
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Article; Proceedings Paper
CT AIAA/ASME/ASCE/AHS/ASC 47th Structures, Structural Dynamics, and
Materials Conference
CY MAY 01-04, 2006
CL Newport, RI
SP AIAA, ASME, ASCE, AHS, ASC
AB Future space telescopes may use large-diameter, flexible, lightweight membrane mirrors to overcome current launch weight and packaging limitations. In-plane actuated tensioned membrane mirrors may be a possible solution to maintaining the precise surface required of a telescope mirror. For this experiment a 0.127-m diam in-plane actuated deformable tensioned membrane mirror was constructed and tested. The research presented herein implements control algorithms based on the results of a nonlinear finite element MSC. Nastran model. The control method used a least-squares approach to create an influence function matrix which was implemented as a proportional plus integral controller. Precision shaping of the test article's mirror surface, expressed in terms of a Zernike coefficient basis set obtained from an optics-based Shack-Hartmann wave front sensor, was demonstrated in a series of quasi-static closed-loop control tests. Micron-level sinusoidall control inputs representing the defocus Zernike coefficient were successfully tracked with an average absolute accuracy of 0.16 mu m. For multimode tracking, commanded tip, tilt, and defocus modes were tracked with an absolute average error of 0.14, 0.09, and 0.18 mu m, respectively, indicating that increasing the dimension of the control system did not significantly degrade its performance. This experimental demonstration illustrates the use of optics-based precision surface control for in-plane actuated membrane mirrors, however, significant technological challenges still exist which may impede the use of this technology for large space-based telescope applications.
C1 USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
RP Shepherd, MJ (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA.
NR 26
TC 5
Z9 6
U1 1
U2 1
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0022-4650
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD JUL-AUG
PY 2007
VL 44
IS 4
BP 953
EP 963
DI 10.2514/1.24847
PG 11
WC Engineering, Aerospace
SC Engineering
GA 197JJ
UT WOS:000248550700022
ER
PT J
AU Ryan, KJ
Bulutoglu, DA
AF Ryan, Kenneth J.
Bulutoglu, Dursun A.
TI E(s(2))-Optimal supersaturated designs with good minimax properties
SO JOURNAL OF STATISTICAL PLANNING AND INFERENCE
LA English
DT Article
DE initial designs; lower bound; minimax criterion; NOA(k) algorithms; row
swapping algorithms; supersaturated design
ID CONSTRUCTION
AB An improved E(s(2)) lower bound is derived for two-level supersaturated designs. This improved bound is used to prove E(s(2))- optimality of the best designs obtained via algorithmic search in all cases with N = 10, 12, 14, and 16 runs (except the N = 14 run, m = 16 factor case). New exchange algorithms which generalize the NOA algorithm of Nguyen [1996. An algorithmic approach to constructing supersaturated designs. Technometrics 38, 69-73] and which tend to find E(s(2))-optimal designs with better minimax properties are proposed. Row swapping algorithms are used to find E(s(2))-optimal designs when the number of factors is large. E(s(2))-optimal designs found via algorithmic search are compared to cyclicly constructed E(s(2))-optimal designs using the minimax criterion. (c) 2006 Elsevier B.V. All rights reserved.
C1 Bowling Green State Univ, Bowling Green, OH 43403 USA.
USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Ryan, KJ (reprint author), Bowling Green State Univ, Bowling Green, OH 43403 USA.
EM kjryan@bgsu.edu; dursun.bulutoglu@afit.edu
NR 17
TC 24
Z9 24
U1 0
U2 1
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 JUL 1
PY 2007
VL 137
IS 7
BP 2250
EP 2262
DI 10.1016/j.jspi.2006.07.008
PG 13
WC Statistics & Probability
SC Mathematics
GA 159AX
UT WOS:000245838900016
ER
PT J
AU Bulutoglu, DA
AF Bulutoglu, Dursun A.
TI Cyclicly constructed E(s(2))-optimal supersaturated designs
SO JOURNAL OF STATISTICAL PLANNING AND INFERENCE
LA English
DT Article
DE balanced incomplete block designs; difference vector; lower bound;
minimax criterion; orbit; primitive element
AB Nguyen [1996. An algorithmic approach to constructing supersaturated designs. Technometrics 38, 69-73] and Tang and Wu [1997. E(s(2))-optimality of supersaturated designs. Statist. Sinica 7, 929-939] independently derived a lower bound for the E(s(2)) value of an N run, m factor supersaturated design (SSD). This bound can be achieved only if m is a multiple of N - 1 when N equivalent to 0 (mod 4) or if m is an even multiple of N - 1 when N = 2 (mod 4). One important question is whether Nguyen-Tang-Wu bound can be achieved in all of these cases. In this paper, based on a construction method by Bulutoglu and Cheng (2004), we present a theoretical method for finding as many positive integers t as possible such that there is an E(s(2))-optimal SSD achieving the Nguyen-Tang-Wu bound with N runs and t (N - 1) factors when N equivalent to 0 (mod 4) and 2t (N - 1) factors when N equivalent to 2 (mod 4). This method is applied to the N = 12, 14, 18, 20, 24, 26, 28, 30, 32, 38, 42, 44, 48, 50, 54 cases. (c) 2006 Elsevier B.V. All rights reserved.
C1 USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Bulutoglu, DA (reprint author), USAF, Inst Technol, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM dursun.bulutoglu@afit.edu
NR 15
TC 13
Z9 13
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 JUL 1
PY 2007
VL 137
IS 7
BP 2413
EP 2428
DI 10.1016/j.jspi.2006.09.020
PG 16
WC Statistics & Probability
SC Mathematics
GA 159AX
UT WOS:000245838900030
ER
PT J
AU Peterson, EL
AF Peterson, Erin L.
TI Fibromyalgia-Management of a misunderstood disorder
SO JOURNAL OF THE AMERICAN ACADEMY OF NURSE PRACTITIONERS
LA English
DT Article
DE fibromyalgia; fibrositis; nurse practitioners
ID PAIN; METAANALYSIS; MULTICENTER; DIAGNOSIS; WOMEN
AB Purpose: The purpose of this article is to review (a) what is currently known about the pathophysiology of fibromyalgia (FM), (b) how to identify patients who are susceptible to this disorder, and (c) the recommended pharmacological and nonpharmacological treatment options.
Data sources: Data sources include reviews and original research from scholarly journals and Internet sites.
Conclusions: There are approximately 6 million individuals in the United States diagnosed with FM, making it the third most prevalent rheumatologic disorder in this country. Failure to identify a specific causal mechanism for FM has resulted in a shift in the focus of research from etiology to treatment (Baumstark & Buckelew, 2002). Based on the literature, the most successful interventions for reduction of chronic symptoms in the FM patient is a combination of education, psychological assistance, and exercise, along with medications. It is essential that nurse practitioners (NPs) understand the issues and concerns of patients afflicted with this complex disorder. Although the organic etiology of FM syndrome remains unclear, the goals of treatment are to control pain and improve adjustment, well-being, and daily functioning of these patients to the maximum extent possible.
Implications for practice: NPs are in a unique position to help identify patients who may be suffering from FM or those diagnosed with FM reporting inadequate relief of symptoms. The incomplete understanding of the biological underpinnings, as well as the multiple symptoms that characterize FM syndrome, make it a challenging disorder to diagnose and treat. it takes time and patience to care for FM patients, and there are no "quick fixes." Diagnosis is made by a combination of patient history, physical examination, laboratory evaluations, and exclusion of other causes of symptoms confused with FM. Understanding the symptomology and recommended treatments will allow NPs to give appropriate care that may include making referrals for multidisciplinary treatment of these complex patients.
C1 USAF, Aviano Air Base, Italy.
RP Peterson, EL (reprint author), PSC 103 Box 2362, APO, AE 09603 USA.
EM erin.peterson@aviano.af.mil
NR 37
TC 11
Z9 11
U1 2
U2 9
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 1041-2972
J9 J AM ACAD NURSE PRAC
JI J. Am. Acad. Nurse Pract.
PD JUL
PY 2007
VL 19
IS 7
BP 341
EP 348
DI 10.1111/j.1745-7599.2007.00235.x
PG 8
WC Health Care Sciences & Services; Nursing
SC Health Care Sciences & Services; Nursing
GA 189PK
UT WOS:000248000800002
PM 17680899
ER
PT J
AU Agostinelli, JR
AF Agostinelli, Joseph R.
TI The feet of the fighting men
SO JOURNAL OF THE AMERICAN PODIATRIC MEDICAL ASSOCIATION
LA English
DT Editorial Material
C1 Orthopaed Associates Ft Walton Beach, Ft Walton Beach, FL USA.
USAF, Washington, DC 20330 USA.
RP Agostinelli, JR (reprint author), Orthopaed Associates Ft Walton Beach, Ft Walton Beach, FL USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER PODIATRIC MED ASSOC
PI BETHESDA
PA 9312 OLD GEORGETOWN ROAD, BETHESDA, MD 20814-1621 USA
SN 8750-7315
J9 J AM PODIAT MED ASSN
JI J. Am. Podiatr. Med. Assoc.
PD JUL-AUG
PY 2007
VL 97
IS 4
BP 266
EP 266
PG 1
WC Orthopedics
SC Orthopedics
GA 193BJ
UT WOS:000248248100003
ER
PT J
AU Wroblewski, DE
Cote, OR
Hacker, JM
Dobosy, RJ
AF Wroblewski, Donald E.
Cote, Owen R.
Hacker, Jorg M.
Dobosy, Ron J.
TI Cliff-ramp patterns and Kelvin-Helmholtz billows in stably stratified
shear flow in the upper troposphere: Analysis of aircraft measurements
SO JOURNAL OF THE ATMOSPHERIC SCIENCES
LA English
DT Article
ID ATMOSPHERIC SURFACE-LAYER; PASSIVE SCALARS; TURBULENCE; EVOLUTION;
TRANSITION; MOMENTUM
AB Cliff-ramp patterns (CR) are a common feature of scalar turbulence, characterized by a sharp temperature increase (cliff) followed by a more gradual temperature decrease (ramp). Aircraft measurements obtained from NOAA best aircraft turbulence probes (BAT) were used to characterize and compare CR patterns observed under stably stratified conditions in the upper troposphere, a region for which there are few such studies. Experimental data were analyzed for three locations, one over Wales and two over southern Australia, the latter in correspondence with the Southern Hemisphere winter subtropical jet stream. Comparison of observed CR patterns with published direct numerical simulations (DNS) revealed that they were likely signatures of Kelvin-Helmholtz (KH) billows, with the ramps associated with the well-mixed billows and the cliffs marking the highly stretched braids. Strong correlation between potential temperature and horizontal velocity supported the KH link, though expected correlations with vertical velocity were not observed. The temperature fronts associated with the cliffs were oriented in a direction approximately normal to the mean wind direction. Locally high values of temperature structure constant near these fronts were associated with steep temperature gradients across the fronts; this may be misleading in the context of electromagnetic propagation, suggesting a false positive indication of high levels of small-scale turbulence that would not correspond to scintillation effects. Billow aspect ratios, braid angles, and length scales were estimated from the data and comparisons with published DNS provided a means for assessing the stage of evolution of the KH billows and the initial Richardson number of the layer.
C1 Boston Univ, Aerosp & Mech Engn, Boston, MA 02215 USA.
AF Res Lab, Hanscom AFB, MA USA.
Flinders Univ S Australia, Adelaide, SA 5001, Australia.
NOAA, ERL, ARL, Oak Ridge, TN USA.
RP Wroblewski, DE (reprint author), Boston Univ, Aerosp & Mech Engn, 110 Cummington, Boston, MA 02215 USA.
EM dew11@bu.edu
RI Dobosy, Ronald/C-3303-2016
OI Dobosy, Ronald/0000-0001-8399-8774
NR 33
TC 9
Z9 9
U1 0
U2 0
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0022-4928
EI 1520-0469
J9 J ATMOS SCI
JI J. Atmos. Sci.
PD JUL
PY 2007
VL 64
IS 7
BP 2521
EP 2539
DI 10.1175/JAS3956.1
PG 19
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 194HN
UT WOS:000248335400019
ER
PT J
AU Johnson, PM
Goda, ME
Gamiz, VL
AF Johnson, Peter M.
Goda, Matthew E.
Gamiz, Victor L.
TI Multiframe phase-diversity algorithm for active imaging
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND
VISION
LA English
DT Article
ID ABERRATIONS; OBJECT
AB A multiframe phase-diversity algorithm for imaging through the turbulent atmosphere tailored to the statistics of coherent light is developed and presented. The problem is posed as a maximum likelihood estimation where pupil-plane intensity data and atmospheric statistics are used to regularize the inverse problem. Reconstruction results characterized by residual mean square error are presented for varying detection parameters. The resulting algorithm appears to be robust under detection noise processes and results in significant improvement of processed images. (c) 2007 Optical Society of America.
C1 Air Force Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA.
Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RP Johnson, PM (reprint author), Air Force Inst Technol, Dept Elect & Comp Engn, 2950 Hobson Way, Wright Patterson AFB, OH 45433 USA.
EM peter.johnson@patrick.af.mil
NR 9
TC 2
Z9 2
U1 0
U2 0
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 JUL
PY 2007
VL 24
IS 7
BP 1894
EP 1900
DI 10.1364/JOSAA.24.001894
PG 7
WC Optics
SC Optics
GA 189ES
UT WOS:000247972800008
PM 17728811
ER
PT J
AU McCarty, R
Monaghan, D
Hallinan, KP
Sanders, B
AF McCarty, R.
Monaghan, D.
Hallinan, K. P.
Sanders, B.
TI Experimental verification of thermal switch effectiveness in
thermoelectric energy harvesting
SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
LA English
DT Article
ID PELTIER JUNCTIONS; DEVICES
AB This paper presents research seeking to experimentally verify the effectiveness of a thermal switch used in series with thermoelectric devices for waste heat recovery for constant and variable source heat input and for variable source thermal capacitance (mass). Using an experimental setup composed serially of a fixed heat source, a variable thermal resistance air gap serving as a thermal switch, a thermoelectric device, and a heat sink, the time-averaged power output to power input ratios improved up to 15% and 30%, respectively, for constant and variable heat input in certain design space conditions. The experimental results, as supported by model predictions, suggest that the thermal capacitance of the heat source must be greater than the thermal capacitance of the thermoelectric device in order for thermal switching to improve the time-averaged power output to power input ratios of waste heat recovery systems. The results have direct application to aircraft energy harvesting.
C1 Univ Dayton, Dayton, OH 45409 USA.
USAF, Res Labs, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA.
RP McCarty, R (reprint author), Univ Dayton, 300 Coll Pk, Dayton, OH 45409 USA.
NR 15
TC 6
Z9 7
U1 1
U2 5
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0887-8722
J9 J THERMOPHYS HEAT TR
JI J. Thermophys. Heat Transf.
PD JUL-SEP
PY 2007
VL 21
IS 3
BP 505
EP 511
DI 10.2514/1.27842
PG 7
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA 193BM
UT WOS:000248248400008
ER
PT J
AU Mosbacker, HL
El Hage, S
Gonzalez, M
Ringel, SA
Hetzer, M
Look, DC
Cantwell, G
Zhang, J
Song, JJ
Brillson, LJ
AF Mosbacker, H. L.
El Hage, S.
Gonzalez, M.
Ringel, S. A.
Hetzer, M.
Look, D. C.
Cantwell, G.
Zhang, J.
Song, J. J.
Brillson, L. J.
TI Role of subsurface defects in metal-ZnO(0001) Schottky barrier formation
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 53rd International Symposium of the American-Vacuum-Society
CY NOV 12-17, 2006
CL San Francisco, CA
SP Amer Vacuum Soc
ID MOLECULAR-BEAM EPITAXY; ZNO; CONTACTS; SURFACES; DEVICES; GROWTH
AB The authors fabricated diodes of Au, Al, Ni, Pt, Pd, W, Ta, and Ir on single crystal ZnO(000 (1) over bar) surfaces from different vendors and measured their Schottky barriers, idealities, and reverse currents on as-received and remote oxygen (20% O-2/80%,He) plasma-treated surfaces. Using low temperature nanoscale depth-resolved cathodoluminescence spectroscopy (DRCLS) under the metal, the authors identified the presence of defect transitions at 2.1, 2.5, and 3.0 eV that change dramatically depending on the process steps and choice of metal. I-V measurements exhibited transitions from Ohmic to Schottky and lower idealities for Pt, Au, Ir, and Pd with plasma treatment. ZnO with low defect densities yield lower idealities and reverse currents. Deep level optical and transient spectroscopies correlated bulk and surface defects, showing deep levels at 2.54 and 0.53 eV, while DRCLS shows that these densities can increase by > 100 times at the surface. The magnitude of the metal's influence correlates directly to the relative defect concentrations near the surface and in the bulk. These results show that metals can induce defect states at the metal-semiconductor interface and impact device performance. (C) 2007 American Vacuum Society.
C1 Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA.
Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
USAF, Res Lab, AFRL, MLPS, Dayton, OH 45435 USA.
NZ Technol Inc, Brea, CA 92821 USA.
Ohio State Univ, Ctr Mat Res, Columbus, OH 43210 USA.
Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA.
Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
RP Mosbacker, HL (reprint author), Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA.
EM mosbacker.1@osu.edu
NR 20
TC 17
Z9 17
U1 2
U2 13
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD JUL-AUG
PY 2007
VL 25
IS 4
BP 1405
EP 1411
DI 10.1116/1.2756543
PG 7
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 206FU
UT WOS:000249170100051
ER
PT J
AU Huang, C
Gregory, JW
Sullivan, JP
AF Huang, C.
Gregory, J. W.
Sullivan, J. P.
TI Flow visualization and pressure measurement in micronozzles
SO JOURNAL OF VISUALIZATION
LA English
DT Article
DE visualization; micronozzle; pressure sensitive-paint; schlieren
AB Micro devices have been widely used in aerospace engineering for years. Engineers are interested in applications of micro devices such as microjets, micro actuators, and micronozzles. The small size nozzles can be used for attitude adjustment and propulsion of micro-satellites or mini-spacecraft. In this paper, convergent-divergent micronozzles have been investigated at supersonic speed with various total pressures and Reynolds numbers. The throat of the micronozzle is 250 micron wide and the nozzle is designed as de Laval type. For the measurements, the Reynolds number at the throat varies from 1200 to 11000 and total pressure varies from 6 psia to 55 psia. Experimental results are obtained with pressure-sensitive paint for pressure measurement and schlieren imaging for flow visualization. Flow visualization is a challenge for conventional techniques due to the small length scales and small depth of the density gradient. A modified schlieren technique is used to increase the sensitivity by taking the ratio of wind-on and wind-off images. Pressure-sensitive paint is also used to obtain global pressure measurement of the flow field and to compare with the schlieren results.
C1 Purdue Univ, Sch Ind Engn, W Lafayette, IN 47907 USA.
USAF Acad, Dept Aeronaut, Colorado Springs, CO 80840 USA.
Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA.
RP Huang, C (reprint author), Purdue Univ, Sch Ind Engn, W Lafayette, IN 47907 USA.
EM chihyung@purdue.edu
RI Huang, Chih-Yung/D-9059-2012; Gregory, James/A-2343-2015
OI Gregory, James/0000-0002-8589-8758
NR 14
TC 14
Z9 15
U1 0
U2 8
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1343-8875
J9 J VISUAL-JAPAN
JI J. Vis.
PD JUL
PY 2007
VL 10
IS 3
BP 281
EP 288
PG 8
WC Computer Science, Interdisciplinary Applications; Imaging Science &
Photographic Technology
SC Computer Science; Imaging Science & Photographic Technology
GA 193RT
UT WOS:000248292700013
ER
PT J
AU Senkov, ON
Scott, JM
Miracle, DB
AF Senkov, O. N.
Scott, J. M.
Miracle, D. B.
TI Development of low density Ca-Mg-Al-based bulk metallic glasses
SO MATERIALS TRANSACTIONS
LA English
DT Article; Proceedings Paper
CT 5th International Conference on Bulk Metallic Glasses
CY OCT 01-05, 2006
CL Osaka Univ, Awaji Isl, JAPAN
SP Minist Educ, Culture, Sports, Sci & Technol, Inst Mat Res, Tohoku Univ, Japan Soc Promot Sci, Natl Inst Mat Sci, Hyogo Int Assoc
HO Osaka Univ
DE bulk metallic glass; amorphous; calcium-magnesium-aluminium; glass
forming ability
ID THERMAL-STABILITY; FORMING ABILITY; STRUCTURAL MODEL; ZN; ALLOYS;
CRITERIA; PACKING
AB Low density Ca-Mg-Al-based bulk metallic glasses containing additionally Cu and Zn, were produced by a copper mold casting method as wedge-shaped samples with thicknesses varying from 0.5 mm to 10 mm. The compositions of the alloys were selected using recently developed specific criteria for glass formation. A structural assessment using the efficient cluster packing model was applied and showed a good ability to represent these glasses. Thermal properties of the new metallic glasses. such as the glass transition, crystallization and melting temperatures, as well as heats of crystallization and melting are reported. The effect of the alloy composition on glass forming ability is discussed.
C1 Universal Energy Syst Inc, Dayton, OH 45432 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Senkov, ON (reprint author), Universal Energy Syst Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA.
EM oleg.senkov@wpafb.af.mil
RI Senkov, Oleg/C-7197-2012
OI Senkov, Oleg/0000-0001-5587-415X
NR 24
TC 13
Z9 13
U1 2
U2 10
PU JAPAN INST METALS
PI SENDAI
PA 1-14-32, ICHIBANCHO, AOBA-KU, SENDAI, 980-8544, JAPAN
SN 1345-9678
EI 1347-5320
J9 MATER TRANS
JI Mater. Trans.
PD JUL
PY 2007
VL 48
IS 7
BP 1610
EP 1616
DI 10.2320/matertrans.MJ200731
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 200DC
UT WOS:000248743100008
ER
PT J
AU Dahlman, J
Senkov, ON
Scott, JM
Miracle, DB
AF Dahlman, James
Senkov, Oleg N.
Scott, James M.
Miracle, Daniel B.
TI Corrosion properties of Ca based bulk metallic glasses
SO MATERIALS TRANSACTIONS
LA English
DT Article; Proceedings Paper
CT 5th International Conference on Bulk Metallic Glasses
CY OCT 01-05, 2006
CL Osaka Univ, Awaji Isl, JAPAN
SP Minist Educ, Culture, Sports, Sci & Technol, Inst Mat Res, Tohoku Univ, Japan Soc Promot Sci, Natl Inst Mat Sci, Hyogo Int Assoc
HO Osaka Univ
DE metallic glass; corrosion; calcium; calcium alloy
ID THERMAL-STABILITY; MG-ZN; FORMING ABILITY; ALLOY; CRITERIA
AB The corrosion properties of ternary (Ca65Mg15Zn20 and Ca50Mg20Cu30), quaternary (Ca55Mg18Zn11Cu16), and quinternary (Ca55Mg15Al10Zn15Cu5) amorphous alloys were evaluated using static aqueous submersion at room temperature. Ca-M-Zn and Ca-Mg-Cu alloy systems experienced destructive corrosion reactions. Ca-Mg-Zn-Cu and Ca-M,-Zn-Cu-Al based amorphous alloys demonstrated positive corrosion properties, forming corrosion films up to 23 mu m thick in the quaternary alloy and 11 mu m thick in the quinternary composition. Corrosion products were evaluated using X-ray diffraction (XRD), X-ray Fluorescence (XRF), Scanning Electron Microscopy (SEM), and Energy Dispersive Spectroscopy (EDS).
C1 Universal Energy Syst Inc, Mat & Proc Div, Dayton, OH 45432 USA.
USAF, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
Wright State Univ, Dayton, OH 45435 USA.
SOCHE, Student Res Program, Dayton, OH 45420 USA.
RP Senkov, ON (reprint author), Universal Energy Syst Inc, Mat & Proc Div, 3155 Res Blvd,Suite 204, Dayton, OH 45432 USA.
EM oleg.senkov@wpafb.af.mil
RI Senkov, Oleg/C-7197-2012
OI Senkov, Oleg/0000-0001-5587-415X
NR 15
TC 17
Z9 17
U1 1
U2 20
PU JAPAN INST METALS
PI SENDAI
PA 1-14-32, ICHIBANCHO, AOBA-KU, SENDAI, 980-8544, JAPAN
SN 1345-9678
EI 1347-5320
J9 MATER TRANS
JI Mater. Trans.
PD JUL
PY 2007
VL 48
IS 7
BP 1850
EP 1854
DI 10.2320/matertrans.MJ200732
PG 5
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 200DC
UT WOS:000248743100057
ER
PT J
AU Barnard, BR
Liaw, PK
Buchanan, RA
Senkov, ON
Miracle, DB
AF Barnard, Bryan R.
Liaw, Peter K.
Buchanan, Raymond A.
Senkov, Oleg N.
Miracle, Daniel B.
TI Oxidation Behavior of ca-based bulk amorphous materials
SO MATERIALS TRANSACTIONS
LA English
DT Article; Proceedings Paper
CT 5th International Conference on Bulk Metallic Glasses
CY OCT 01-05, 2006
CL Osaka Univ, Awaji Isl, JAPAN
SP Minist Educ, Culture, Sports, Sci & Technol, Inst Mat Res, Tohoku Univ, Japan Soc Promot Sci, Natl Inst Mat Sci, Hyogo Int Assoc
HO Osaka Univ
DE bulk-amorphous materials; metallic glasses; oxidation; kinetics;
calcium-based alloys
ID GLASS-FORMING ABILITY; METALLIC-GLASS; FATIGUE BEHAVIOR;
THERMAL-STABILITY; SUPERCOOLED LIQUID; MG-ZN; MECHANICAL-PROPERTIES;
CORROSION BEHAVIOR; ALLOY SYSTEM; ZR65CU17.5NI10AL7.5
AB In this study, the room-temperature oxidation behaviors of three Ca-based bulk amorphous alloys, Ca65Mg15Zn20, Ca50Mg20Cu30, and Ca55Mg18Zn11Cu16, were examined under normal flowing laboratory air and compared with the oxidation behaviors of these alloys in the crystalline form tinder identical conditions. The degree of oxidation for alloys in the amorphous and crystalline conditions was investigated by periodically measuring the mass change over the oxidation time. From the results of the oxidation mass change, and oxide thickness measurements obtained from scanning-electron-microscopy (SEM) studies, it was determined that the Ca55Mg18Zn11Cu16 BMG possessed the most favorable oxidation resistance, followed closely by the Ca50Mg20Cu30 BMG. with the Ca65Mg15Zn20 BMG having the least favorable oxidation resistance. The trend in glass-forming abilities of the three compositions follows the same trend as the oxidation resistance in the three alloys. In all cases, the oxidation resistance of the amorphous alloys was superior to the oxidation resistance ofthe same alloys in the crystalline state.
C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
Universal Energy Syst Inc, Dayton, OH 45432 USA.
USAF, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
RP Barnard, BR (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
RI Senkov, Oleg/C-7197-2012
OI Senkov, Oleg/0000-0001-5587-415X
NR 55
TC 10
Z9 10
U1 1
U2 12
PU JAPAN INST METALS
PI SENDAI
PA 1-14-32, ICHIBANCHO, AOBA-KU, SENDAI, 980-8544, JAPAN
SN 1345-9678
EI 1347-5320
J9 MATER TRANS
JI Mater. Trans.
PD JUL
PY 2007
VL 48
IS 7
BP 1870
EP 1878
DI 10.2320/matertrans.MJ200744
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 200DC
UT WOS:000248743100061
ER
PT J
AU Kramer, RM
Crookes-Goodson, WJ
Naik, RR
AF Kramer, Ryan M.
Crookes-Goodson, Wendy J.
Naik, Rajesh R.
TI The self-organizing properties of squid reflectin protein
SO NATURE MATERIALS
LA English
DT Article
ID LOLLIGUNCULA-BREVIS; IONIC LIQUIDS; IRIDOPHORES; DISSOLUTION;
COLORATION; BIOLOGY; MATRIX; ENAMEL; HELIX
AB Reflectins, a recently identified protein family that is enriched in aromatic and sulphur-containing amino acids, are used by certain cephalopods to manage and manipulate incident light in their environment. These proteins are the predominant constituent of nanoscaled photonic structures that function in static and adaptive colouration, extending visual performance and intraspecies communication. Our investigation into recombinantly expressed reflectin has revealed unanticipated self-assembling and behavioural properties, and we demonstrate that reflectin can be easily processed into thin films, photonic grating structures and fibres. Our findings represent a key step in our understanding of the property-function relationships of this unique family of reflective proteins.
C1 USAF, Res Lab, Mat & Mfg Directorate, Biotechnol Grp, Wright Patterson AFB, OH 45433 USA.
RP Naik, RR (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Biotechnol Grp, Wright Patterson AFB, OH 45433 USA.
EM rajesh.naik@wpafb.af.mil
FU NCRR NIH HHS [RR 12294]; NIAID NIH HHS [AI50611]
NR 26
TC 75
Z9 75
U1 7
U2 48
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
J9 NAT MATER
JI Nat. Mater.
PD JUL
PY 2007
VL 6
IS 7
BP 533
EP 538
DI 10.1038/nmat1930
PG 6
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 184NH
UT WOS:000247648000024
PM 17546036
ER
PT J
AU Klimo, P
Slotkin, JR
Brockmeyer, D
AF Klimo, Paul
Slotkin, Jonathan R.
Brockmeyer, Douglas
TI Pediatric spine surgery (part I): Normal and abnormal development of the
spine - Preface
SO NEUROSURGERY CLINICS OF NORTH AMERICA
LA English
DT Editorial Material
C1 Wright Patterson Air Force Base, Wright Patterson AFB, OH 45433 USA.
Univ Utah, Dept Neurosurg, Div Pediat Neurosurg, Primary Childrens Med Ctr, Salt Lake City, UT 84113 USA.
Harvard Univ, Sch Med, Brigham & Womens Hosp, Childrens Hosp,Dept Neurosurg, Boston, MA 02115 USA.
RP Klimo, P (reprint author), Wright Patterson Air Force Base, 4881 Sugar Maple Dr, Wright Patterson AFB, OH 45433 USA.
EM atomkpnk@yahoo.com; jonathan.slotkin@childrens.harvard.edu;
Douglas.brockmeyer@hsc.utah.edu
NR 0
TC 1
Z9 1
U1 0
U2 0
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 1042-3680
J9 NEUROSURG CLIN N AM
JI Neurosurg. Clin. N. Am.
PD JUL
PY 2007
VL 18
IS 3
BP IX
EP X
DI 10.1016/j.nec.2007.06.001
PG 2
WC Clinical Neurology; Surgery
SC Neurosciences & Neurology; Surgery
GA 204UQ
UT WOS:000249069900001
ER
PT J
AU Klimo, P
Rao, G
Brockmeyer, D
AF Klimo, Paul
Rao, Ganesh
Brockmeyer, Douglas
TI Congenital anomalies of the cervical spine
SO NEUROSURGERY CLINICS OF NORTH AMERICA
LA English
DT Review
ID KLIPPEL-FEIL-SYNDROME; OF-THE-LITERATURE; POSTERIOR ARCH; OS
ODONTOIDEUM; CRANIOVERTEBRAL JUNCTION; PARTIAL APLASIA; CANAL STENOSIS;
CERVICOMEDULLARY COMPRESSION; OCCIPITAL CONDYLE; OSSEOUS ANOMALIES
AB There are numerous congenital anomalies of the cervical spine. They can be simple and clinically inconsequential to complex with serious neurologic and structural implications. They can occur in isolation or as one of several maldeveloped organs in the patients. Many are discovered incidentally. The more common anomalies seen by pediatric spine surgeons include defects of the anterior or posterior arches of C1, occipital assimilation of the atlas, basilar invagination or impression, os odontoideum, and Klippel-Feil syndrome. Management begins with a detailed history, physical examination, and imaging studies. In general, those lesions that are causing or have caused neurologic injury, chronic pain, or spinal deformity or place the patient at high risk for developing these require treatment.
C1 SGOS SGCXN 88th, Wright Patterson AFB, OH 45433 USA.
Univ Texas, MD Anderson Canc Ctr, Houston, TX 77030 USA.
Primary Childrens Med Ctr, Div Pediat Neurosurg, Salt Lake City, UT 84113 USA.
RP Klimo, P (reprint author), SGOS SGCXN 88th, 4881 Sugar Maple Dr, Wright Patterson AFB, OH 45433 USA.
EM atomkpnk@yahoo.com
NR 132
TC 35
Z9 36
U1 1
U2 6
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 1042-3680
J9 NEUROSURG CLIN N AM
JI Neurosurg. Clin. N. Am.
PD JUL
PY 2007
VL 18
IS 3
BP 463
EP +
DI 10.1016/j.nec.2007.04.005
PG 17
WC Clinical Neurology; Surgery
SC Neurosciences & Neurology; Surgery
GA 204UQ
UT WOS:000249069900004
PM 17678749
ER
PT J
AU Caefer, CE
Stefanou, MS
Nielsen, ED
Rizzuto, AP
Raviv, O
Rotman, SR
AF Caefer, Charlene E.
Stefanou, Marcus S.
Nielsen, Eric D.
Rizzuto, Anthony P.
Raviv, Ori
Rotman, Stanley R.
TI Analysis of false alarm distributions in the development and evaluation
of hyperspectral point target detection algorithms
SO OPTICAL ENGINEERING
LA English
DT Article
DE hyperspectral; point target detection; algorithm performance metric
ID FILTERS; IMAGES
AB We analyze the efficacy of various point target detection algorithms for hyperspectral data. We present a novel way to measure the discrimination capability of a target detection algorithm; we avoid being critically dependent on the particular placement of a target in the image by examining the overall ability to detect a target throughout the various backgrounds of the cube. We first demonstrate this approach by analyzing previously published algorithms from the literature; we then present two new dissimilar algorithms that are designed to eliminate false alarms on edges. Trade-offs between the probability of detection and false alarms rates are considered. We use our metrics to quantify the improved capability of the proposed algorithms over the standard algorithms. (c) 2007 Society of Photo-Optical Instrumentation Engineers.
C1 Air Force Res Lab, Sensors Direct, Infrared Sensor Technol Branch, Hanscom AFB, MA 01731 USA.
Ben Gurion Univ Negev, Dept Elect & Comp Engn, IL-84105 Beer Sheva, Israel.
RP Caefer, CE (reprint author), Air Force Res Lab, Sensors Direct, Infrared Sensor Technol Branch, 80 Scott Dr, Hanscom AFB, MA 01731 USA.
EM charlene.caefer@hanscom.af.mil; srotman@ee.bgu.ac.il
RI ROTMAN, STANLEY/F-1390-2012
NR 16
TC 17
Z9 17
U1 0
U2 1
PU SPIE-SOC PHOTOPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
J9 OPT ENG
JI Opt. Eng.
PD JUL
PY 2007
VL 46
IS 7
AR 076402
DI 10.1117/1.2759894
PG 15
WC Optics
SC Optics
GA 221BA
UT WOS:000250200700033
ER
PT J
AU Pfannenstiel, TJ
Gal, TJ
Hayes, DK
Myers, KV
AF Pfannenstiel, Travis J.
Gal, Thomas J.
Hayes, David K.
Myers, Karen V.
TI Vocal fold immobility following burn intensive care
SO OTOLARYNGOLOGY-HEAD AND NECK SURGERY
LA English
DT Article; Proceedings Paper
CT 127th Annual Meeting of the American-Laryngological-Association
CY MAY 19-20, 2006
CL Chicago, IL
SP Amer Laryngol Assoc
ID PROLONGED INTUBATION; LARYNGEAL; INJURY; PARALYSIS
AB OBJECTIVE: To evaluate factors associated with the development of vocal fold immobility in patients surviving burn intensive care.
STUDY DESIGN AND SETTING: A retrospective review of patients referred to Department of Speech Pathology by the Burn Intensive Care Unit between June 2002 and November 2004. Patients underwent videostroboscopic examination, and associations of vocal fold immobility with factors related to patient management were examined by using logistic regression.
RESULTS: Vocal fold immobility was diagnosed in 25 (48%) of the 52 patients evaluated. A significant association with a history of intubation during overseas aeromedical evacuation (odds ratio 4.5, P = 0.026) was observed. Multivariate modeling demonstrated an increased risk of 3% for each % total body surface area (TBSA) of burn.
CONCLUSION: High-altitude transport of intubated patients was a significant risk factor in the development of laryngeal injury.
SIGNIFICANCE: This study magnifies the role that endotracheal tube cuff pressure may play in recurrent laryngeal nerve injury. (C) 2007 American Academy of Otolaryngology-Head and Neck Surgery Foundation. All rights reserved.
C1 Brooke Army Med Ctr, Dept Otolaryngol, Houston, TX USA.
Dept Speech Pathol, Houston, TX USA.
Wilford Hall USAF Med Ctr, Dept Otolaryngol, Lackland AFB, TX USA.
RP Pfannenstiel, TJ (reprint author), Brooke Army Med Ctr, Dept Otolaryngol, 3851 Roger Brooke Dr, Houston, TX 78234 USA.
EM travis.pfannenstiel@us.army.mil
NR 10
TC 2
Z9 2
U1 0
U2 3
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0194-5998
J9 OTOLARYNG HEAD NECK
JI Otolaryngol. Head Neck Surg.
PD JUL
PY 2007
VL 137
IS 1
BP 152
EP 156
DI 10.1016/j.otohns.2007.03.024
PG 5
WC Otorhinolaryngology; Surgery
SC Otorhinolaryngology; Surgery
GA 185VY
UT WOS:000247739700027
PM 17599583
ER
PT J
AU Huang, T
Huang, DH
AF Huang, Tony
Huang, Danhong
TI Interplay between optical nonlinearity and localization in a finite
disordered Fibonacci chain
SO PHYSICAL REVIEW B
LA English
DT Article
ID PHOTONIC BAND-STRUCTURE; INHIBITED SPONTANEOUS EMISSION; THUE-MORSE;
SEMICONDUCTOR SUPERLATTICES; RENORMALIZATION-GROUP; QUANTUM-WELLS;
LATTICES; POTENTIALS; TRANSPORT; SYSTEMS
AB Both the average transmission coefficients and dimensionless optical resistances of a nonlinear disordered Fibonacci chain are calculated as functions of the photon flux of an incident light field with various types of chains of scatters, numbers of embedded nonlinear-optical scatterers, and energies of incident photons. If the incident optical field is very weak, the nonlinear-optical scattering in the chain becomes negligible and the chain behaves just like a transparent dielectric slab. As for the interplay between the optical nonlinearity and localization effect in the finite disordered Fibonacci chain, it is found that the localization effect introduced in the disordered Fibonacci chain exhibits a reduction in the transmission only when the incident optical field is strong. The localization effect, which increases with the number of scatterers in the chain, is found to yield an enhanced optical nonlinearity of the system. The localization effect on the incident optical wave in the chain can be accelerated by an intense light illumination in the presence of a large number of nonlinear-optical scatterers. When energetic photons fly through the chain, they tend to ignore most of the deeply embedded optical scatterers. When the number of scatterers in the system is F-16=1597, a complete localization in the chain is reached for an incident field amplitude as low as 50 kV/cm.
C1 USAF, Res Lab, AFRL VSSS, Kirtland AFB, NM 87117 USA.
RP Huang, T (reprint author), 8217 RC Gorman Ave NE, Albuquerque, NM 87122 USA.
NR 38
TC 2
Z9 2
U1 0
U2 1
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 JUL
PY 2007
VL 76
IS 2
AR 024201
DI 10.1103/PhysRevB.76.024201
PG 7
WC Physics, Condensed Matter
SC Physics
GA 196QD
UT WOS:000248496200037
ER
PT J
AU Albert, JM
AF Albert, J. M.
TI Refractive index and wavenumber properties for cyclotron resonant
quasilinear diffusion by cold plasma waves
SO PHYSICS OF PLASMAS
LA English
DT Article
ID PITCH-ANGLE; ELECTROMAGNETIC-WAVES; COEFFICIENTS; ACCELERATION; ENERGY;
MAGNETOSPHERE
AB Wave-particle interactions have a large effect on magetospheric particles, in the radiation belts and elsewhere. Bounce-averaged quasilinear diffusion coefficients have been calculated for whistler hiss and chorus and electromagnetic ion cyclotron waves (EMIC), which are all believed to play major roles. To perform these calculations efficiently, techniques have been developed that use properties of the refractive index of these modes to identify ranges of wave-normal angle that are compatible with cyclotron resonance in a given frequency band. Other cold plasma waves, in the L-X, L-O, R-X, and Z modes, can also resonate with energetic electrons, and some preliminary calculations of their diffusion coefficients have been reported. Here, it is shown that the refractive index of these modes allows the techniques developed for whistler and EMIC waves to be applied to them as well. Sample calculations are presented for Z mode waves, with omega(pe)>Omega(e) and omega(pe)= 600 degrees C, with bulk shallow donors then becoming completely dominant for T-meas > 50 K, and near-surface donors at lower temperatures. As T-A is varied from 100-650 degrees C, both the mobility and carrier concentraticm vary in nonmonotonic fashion, due to changes in the relative strengths of the bulk and surface components of conduction. (c) 2007 Elsevier Ltd. All rights reserved.
C1 Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Look, DC (reprint author), Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA.
EM David.Look@wpafb.af.mil
NR 12
TC 19
Z9 19
U1 1
U2 5
PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0749-6036
J9 SUPERLATTICE MICROST
JI Superlattices Microstruct.
PD JUL-DEC
PY 2007
VL 42
IS 1-6
BP 284
EP 289
DI 10.1016/j.spmi.2007.04.058
PG 6
WC Physics, Condensed Matter
SC Physics
GA 222BN
UT WOS:000250271200052
ER
PT J
AU Mass, J
Avella, M
Jimenez, J
Callahan, M
Grant, E
Rakes, K
Bliss, D
Wang, B
AF Mass, J.
Avella, M.
Jimenez, J.
Callahan, M.
Grant, E.
Rakes, K.
Bliss, D.
Wang, B.
TI Cathodoluminescence study of extended defects in hydrothermal ZnO
crystals
SO SUPERLATTICES AND MICROSTRUCTURES
LA English
DT Article; Proceedings Paper
CT Symposium on ZnO and Related Materials held at the 2006 EMRS Spring
Meeting
CY MAY 29-JUN 02, 2006
CL Nice, FRANCE
SP European Mat Res Soc
DE ZnO; crystal defects; cathodoluminescence; hydrothermal crystal
ID PHOTOLUMINESCENCE; EXCITON
AB Understanding the luminescence of ZnO is very important for some applications. In spite of the many studies carried out, there are still some points concerning the origin of some of the luminescence emissions in ZnO crystals that require additional study; in particular, the role of extended defects remains to be a matter of controversy. We present here a cathodoluminescence analysis of the defects generated by Vickers indentation in hydrothermal HTT crystals. Special emphasis was paid to the luminescence band peaking around 3.3 eV. The origin of this band is a matter of controversy, since it has been related to different causes, extended defects being one of the candidates for this emission. The CL images were acquired around crystal defects. It is observed that the 3.3 eV emission is enhanced around the crystal defects; though it is also observed, but weaker, out of the defect regions, which Suggests that there exist two luminescence emissions peaking very close to 3.3 eV. The two emissions, one related to structural defects and the other to the LO phonon replica of the free excitonic band, appear very close each other and their relative intensity should determine the shape of the spectrum. (c) 2007 Elsevier Ltd. All rights reserved.
C1 Fis Mat Condensada, ETSII, Valladolid 47011, Spain.
USAF, Res Lab, Hanscom AFB, Bedford, MA 01731 USA.
Solid State Sci Corp, Nashua, NH 03049 USA.
Univ Norte, Dipartimento Matemat & Fis, Barranquilla, Colombia.
RP Jimenez, J (reprint author), Fis Mat Condensada, ETSII, Valladolid 47011, Spain.
EM jimenez@fmc.uva.es
NR 14
TC 2
Z9 2
U1 0
U2 7
PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0749-6036
J9 SUPERLATTICE MICROST
JI Superlattices Microstruct.
PD JUL-DEC
PY 2007
VL 42
IS 1-6
BP 306
EP 313
DI 10.1016/j.spmi.2007.04.019
PG 8
WC Physics, Condensed Matter
SC Physics
GA 222BN
UT WOS:000250271200056
ER
PT J
AU Hruby, G
Weld, KJ
Marruffo, F
Collins, S
Durak, E
Mitchell, R
Herron, A
Landman, J
AF Hruby, Gregory
Weld, Kyle J.
Marruffo, Franzo
Collins, Sean
Durak, Evren
Mitchell, Rob
Herron, Alan
Landman, Jaime
TI Comparison of novel tissue apposing device and standard anastomotic
technique for vesicourethral anastomoses
SO UROLOGY
LA English
DT Article
ID LAPAROSCOPIC RADICAL PROSTATECTOMY; LEARNING-CURVE; MODEL
AB OBJECTIVES To evaluate a novel sutureless tissue apposing vesicourethral anastomosis (VUA) device in a porcine model and compare it with standard laparoscopically sutured VUA. METHODS Thirty domestic pigs were divided into six groups. In groups 1, 2, and 3, a standard laparoscopic sutured running VUA was performed. In groups 4, 5, and 6, a novel device VUA was performed. In all cases, cystography was completed immediately after completion of the anastomosis and when each pig was killed. At necropsy, the gross findings of the VUA were documented, and each anastomosis was excised en bloc for histopathologic evaluation of healing parameters. RESULTS In the 30 pigs, 29 (97%) device or sutured VUAs were successfully performed laparoscopically without conversion to an open approach. The mean operative time for the standard and device groups was 87 and 68 minutes, respectively (P = 0.04). The anastomotic time for the standard and device groups was 41 and 12 minutes, respectively (P <0.01). Histopathologic evaluation of the groups at I week of follow-up revealed significantly lower fibrosis scores for the novel anastomosis device VUA compared with the standard sutured VUA (median score 1 and 3, respectively; P = 0.04). The evaluation of groups 2 and 5 (3-week survival) and groups 3 and 6 (7-week survival) revealed no significant differences in any of the histopathologic parameters evaluated. CONCLUSIONS The novel device requires little technical skill to deploy and is expeditious, requiring less time than a standard sutured anastomosis. At the 1 week follow-up point, histopathologic examination revealed that the novel device was superior regarding fibrotic reactions.
C1 Columbia Univ, Med Ctr, Dept Urol, New York, NY 10032 USA.
Columbia Univ, Med Ctr, Inst Comparat Med, New York, NY 10032 USA.
Wilford Hall USAF Med Ctr, Dept Urol, Lackland AFB, TX 78236 USA.
RP Landman, J (reprint author), Columbia Univ, Med Ctr, Dept Urol, 161 Fort Washington Ave,Room 1111, New York, NY 10032 USA.
EM landmanj@yahoo.com
NR 8
TC 8
Z9 9
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0090-4295
J9 UROLOGY
JI Urology
PD JUL
PY 2007
VL 70
IS 1
BP 190
EP 195
DI 10.1016/j.urology.2007.02.061
PG 6
WC Urology & Nephrology
SC Urology & Nephrology
GA 209LT
UT WOS:000249390700045
PM 17656246
ER
PT J
AU Sandhu, SS
Brutchen, GW
Fellner, JP
AF Sandhu, Sarwan S.
Brutchen, George W.
Fellner, Joseph P.
TI Lithium/air cell: Preliminary mathematical formulation and analysis
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE lithium/air cell
ID ORGANIC ELECTROLYTE BATTERY; LITHIUM/OXYGEN BATTERY
AB Fundamentals of classical thermodynamics and chemical species mole balances have been applied to formulate the mathematical equations to compute lithium/air cell reversible reaction voltages, heat transfer rate between the cell and its surroundings, theoretical discharge capacity, and thermal efficiency. The developed formulation also provides a set of mathematical equations to compute the total cathode volume for a desired maximum discharge capacity of a lithium/air cell or battery. (C) 2007 Elsevier B.V. All rights reserved.
C1 Univ Dayton, Dept Chem Engn, Dayton, OH 45469 USA.
USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Sandhu, SS (reprint author), Univ Dayton, Dept Chem Engn, Dayton, OH 45469 USA.
EM sarwar.sandhu@notes.udayton.edu
NR 11
TC 18
Z9 20
U1 3
U2 27
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 JUN 30
PY 2007
VL 170
IS 1
BP 196
EP 209
DI 10.1016/j.jpowsour.2007.04.006
PG 14
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 186QP
UT WOS:000247793500027
ER
PT J
AU O'Neil, RR
Winick, JR
Picard, RH
Kendra, M
AF O'Neil, R. R.
Winick, J. R.
Picard, R. H.
Kendra, M.
TI Auroral NO+ 4.3 mu m emission observed from the midcourse space
experiment: Multiplatform observations of 9 February 1997
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID FRANCK-CONDON FACTORS; RADIATIVE LIFETIME; GROUND-STATE;
TRANSITION-PROBABILITIES; ELECTRON-PRECIPITATION; STATISTICAL-MODEL; MSX
SATELLITE; ION; EXCITATION; ENERGY
AB The Spatial Infrared Imaging Telescope III (SPIRIT III) radiometer on the Midcourse Space Experiment satellite (MSX), observed enhanced 4.3 mm emission from a very well characterized aurora over the Barents Sea on 9 February 1997, in conjunction with observations by the POLAR and FAST satellites, the Loparskaya ground site, and ultraviolet and visible spectrometers aboard MSX. Measurements of the auroral location, form, spatial extent and dosing conditions were applied to specify the component of auroral 4.3 mm radiance due to the slowly produced and optically thick CO2 nu(3) (001-000) transition. An analysis based on the Auroral Atmospheric Radiance Code (AARC) indicates: (1) the emission originates near and beyond the tangent point; (2) the optically thick CO2 nu(3) radiation is largely self absorbed by the intervening atmosphere; and (3) the auroral enhancement is predominantly due to NO+ Delta v = 1 vibrational state transitions. In addition, the analysis indicates that the previously reported laboratory result for the NO+ v >= 1 vibrational yield from the reaction, N+ + O-2, is insufficient to account for the observed 4.3 mm emission. In order to explain the current results, we propose that there is additional production from the reaction, N-2(+) + O, forming NO+ in vibrational levels 0, 1, and 2 with relative populations of approximately 0.25, 0.5, and 0.25, respectively. The combined production processes yield an energetic electron induced efficiency of 0.56 +/- 0.18 photons per auroral ion pair for NO+ Delta v = 1 emission at altitudes equal to or greater than 112 km.
C1 USAF, Space Vehicles Directorate, Res Lab, Hanscom AFB, MA 01731 USA.
Atmospher Environm Res Inc, Lexington, MA USA.
RP O'Neil, RR (reprint author), USAF, Space Vehicles Directorate, Res Lab, 29 Randolph Rd, Hanscom AFB, MA 01731 USA.
EM robert.oneil@hanscom.af.mil
NR 61
TC 3
Z9 3
U1 1
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD JUN 29
PY 2007
VL 112
IS A6
AR A06327
DI 10.1029/2006JA012120
PG 22
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 185EL
UT WOS:000247694100002
ER
PT J
AU Jordan, JL
Siviour, CR
Foley, JR
Brown, EN
AF Jordan, Jennifer L.
Siviour, Clive R.
Foley, Jason R.
Brown, Eric N.
TI Compressive properties of extruded polytetrafluoroethylene
SO POLYMER
LA English
DT Article
DE semi-crystalline polymer; high strain rate mechanical properties;
polytetrafluoroethylene
ID HIGH-DENSITY POLYETHYLENE; HOPKINSON PRESSURE BAR; HIGH-STRAIN RATES;
POLY TETRAFLUOROETHYLENE; CONSTITUTIVE-EQUATIONS; TEMPERATURE
DEPENDENCE; MECHANICAL PROPERTIES; YIELD BEHAVIOR; WIDE-RANGE;
DEFORMATION
AB Polymers are becoming increasingly used in aerospace structural applications, where they experience complex, non-static loads. Correspondingly, the mechanical properties at high strain rates are of increasing importance in these applications. This paper presents an investigation of the properties of Dupont 9B polytetrafluoroethylene (PTFE) across strain rates from 10(-3) to 10(5) s(-1). The samples were tested using an Instron mechanical testing machine for static loading, traditional split Hopkinson pressure bars (SHPBs) for high strain rates, and a miniaturized SHPB for ultra-high strain rates. Additionally, the material was tested using dynamic mechanical analysis to determine the effects of time-temperature superposition on the strain rate behavior of the samples. The results of the experiments are analyzed using the Zerilli-Armstrong model for polymers, which shows good agreement with other PTFE studies. (c) 2007 Elsevier Ltd. All rights reserved.
C1 USAF, Res Lab, Energet Mat Branch, Munit Directorate, Eglin AFB, FL 32542 USA.
Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England.
USAF, Res Lab, Fuzes Branch, Munit Directorate, Eglin AFB, FL 32542 USA.
Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Jordan, JL (reprint author), USAF, Res Lab, Energet Mat Branch, Munit Directorate, Eglin AFB, FL 32542 USA.
EM jennifer.jordan@eglin.af.mil
RI Siviour, Clive/E-2032-2012;
OI Jordan, Jennifer/0000-0002-4596-5872; Brown, Eric/0000-0002-6812-7820
NR 53
TC 33
Z9 33
U1 2
U2 25
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0032-3861
J9 POLYMER
JI Polymer
PD JUN 29
PY 2007
VL 48
IS 14
BP 4184
EP 4195
DI 10.1016/j.polymer.2007.05.038
PG 12
WC Polymer Science
SC Polymer Science
GA 187NQ
UT WOS:000247855300034
ER
EF