FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Barstow, MA
Kowalski, MP
Cruddace, RG
Wood, KS
Auchere, F
Bannister, NJ
Bode, MF
Bromage, GE
Burleigh, MR
Cameron, AC
Cassatella, A
Delmotte, F
Doyle, JG
Gaensicke, B
Gibson, B
Jeffery, CS
Jordan, C
Kappelmann, N
Lallement, R
Lapington, JS
de Martino, D
Matthews, SA
Orio, M
Pace, E
Pagano, I
Phillips, KJH
Ravet, MF
Schmitt, JHMM
Welsh, BY
Werner, K
Del Zanna, G
AF Barstow, M. A.
Kowalski, M. P.
Cruddace, R. G.
Wood, K. S.
Auchere, F.
Bannister, N. J.
Bode, M. F.
Bromage, G. E.
Burleigh, M. R.
Cameron, A. C.
Cassatella, A.
Delmotte, F.
Doyle, J. G.
Gaensicke, B.
Gibson, B.
Jeffery, C. S.
Jordan, C.
Kappelmann, N.
Lallement, R.
Lapington, J. S.
de Martino, D.
Matthews, S. A.
Orio, M.
Pace, E.
Pagano, I.
Phillips, K. J. H.
Ravet, M. -F.
Schmitt, J. H. M. M.
Welsh, B. Y.
Werner, K.
Del Zanna, G.
TI Stellar And Galactic Environment survey (SAGE)
SO EXPERIMENTAL ASTRONOMY
LA English
DT Article
DE Stars; White dwarfs; AGN; Cataclysmic variables; Extreme ultraviolet;
Spectroscopy; Gratings; MCP detectors
ID INTERMEDIATE-ACTIVITY LEVELS; LOCAL INTERSTELLAR-MEDIUM; NEAR-NORMAL
INCIDENCE; LONG-TERM STABILITY; EXTREME-ULTRAVIOLET; CORONAL ABUNDANCES;
WHITE-DWARFS; WAVELENGTH REGION; RESOLUTION; SPECTROSCOPY
AB This paper describes a proposed high resolution soft X-ray and Extreme Ultraviolet spectroscopy mission to carry out a survey of Stellar and Galactic Environments (SAGE). The payload is based on novel diffraction grating technology which has already been proven in a sub-orbital space mission and which is ready to fly on a satellite platform with minimal development. We discuss the goals of a SAGE base-line mission and demonstrate the scientific importance of high resolution spectroscopy in the Extreme Ultraviolet for the study of stars and the local interstellar medium.
C1 [Barstow, M. A.; Bannister, N. J.; Burleigh, M. R.; Lapington, J. S.] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
[Kowalski, M. P.; Cruddace, R. G.; Wood, K. S.] USN, Res Lab, Washington, DC 20375 USA.
[Auchere, F.] Univ Paris 11, Inst Astrophys Spatiale, Orsay, France.
[Bode, M. F.] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH411LD, Merseyside, England.
[Bromage, G. E.; Gibson, B.] Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England.
[Cameron, A. C.] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9AJ, Fife, Scotland.
[Cassatella, A.] Univ Roma Tre, Inst Nazl Astrofis, Rome, Italy.
[Delmotte, F.; Ravet, M. -F.] Inst Opt, Palaiseau, France.
[Doyle, J. G.; Jeffery, C. S.] Armagh Observ, Armagh BT61 9DG, North Ireland.
[Gaensicke, B.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Kappelmann, N.; Werner, K.] Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany.
[Lallement, R.] CNRS, Serv Aeron, F-91371 Verrieres Le Buisson, France.
[de Martino, D.] Osserv Astron Capodimonte, INAF, I-80131 Naples, Italy.
[Matthews, S. A.; Phillips, K. J. H.; Del Zanna, G.] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
[Orio, M.] Osserv Astron Padova, INAF, Padua, Italy.
[Pace, E.] Univ Florence, Dip Astron & Sci Spazio, Florence, Italy.
[Pagano, I.] Osserv Astrofis Catania, INAF, I-95125 Catania, Italy.
[Schmitt, J. H. M. M.] Univ Hamburg, Hamburg, Germany.
[Welsh, B. Y.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Jordan, C.] Univ Oxford, Dept Phys, Oxford, England.
RP Barstow, MA (reprint author), Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
EM mab@star.le.ac.uk
RI Lapington, Jon/A-7669-2012; Gaensicke, Boris/A-9421-2012; Gibson,
Brad/M-3592-2015; Pagano, Isabella/I-6934-2015; Matthews,
Sarah/C-4292-2008;
OI Gaensicke, Boris/0000-0002-2761-3005; Gibson, Brad/0000-0003-4446-3130;
Pagano, Isabella/0000-0001-9573-4928; Auchere,
Frederic/0000-0003-0972-7022; Cameron, Andrew/0000-0002-8863-7828; de
Martino, Domitilla/0000-0002-5069-4202; Matthews,
Sarah/0000-0001-9346-8179; Jeffery, C. Simon/0000-0003-1759-0302
NR 49
TC 3
Z9 3
U1 0
U2 2
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0922-6435
J9 EXP ASTRON
JI Exp. Astron.
PD MAR
PY 2009
VL 23
IS 1
BP 169
EP 191
DI 10.1007/s10686-008-9105-x
PG 23
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 409KZ
UT WOS:000263505900009
ER
PT J
AU Cockell, CS
Herbst, T
Leger, A
Absil, O
Beichman, C
Benz, W
Brack, A
Chazelas, B
Chelli, A
Cottin, H
du Foresto, V
Danchi, W
Defrere, D
Den Herder, JW
Eiroa, C
Fridlund, M
Henning, T
Johnston, K
Kaltenegger, L
Labadie, L
Lammer, H
Launhardt, R
Lawson, P
Lay, OP
Liseau, R
Martin, SR
Mawet, D
Mourard, D
Moutou, C
Mugnier, L
Paresce, F
Quirrenbach, A
Rabbia, Y
Rottgering, HJA
Rouan, D
Santos, N
Selsis, F
Serabyn, E
Westall, F
White, G
Ollivier, M
Borde, P
AF Cockell, Charles S.
Herbst, Tom
Leger, Alain
Absil, O.
Beichman, Charles
Benz, Willy
Brack, Andre
Chazelas, Bruno
Chelli, Alain
Cottin, Herve
du Foresto, Vincent Coude
Danchi, William
Defrere, Denis
den Herder, Jan-Willem
Eiroa, Carlos
Fridlund, Malcolm
Henning, Thomas
Johnston, Kenneth
Kaltenegger, Lisa
Labadie, Lucas
Lammer, Helmut
Launhardt, Ralf
Lawson, Peter
Lay, Oliver P.
Liseau, Rene'
Martin, Stefan R.
Mawet, Dimitri
Mourard, Denis
Moutou, Claire
Mugnier, Laurent
Paresce, Francesco
Quirrenbach, Andreas
Rabbia, Yves
Rottgering, Huub J. A.
Rouan, Daniel
Santos, Nuno
Selsis, Franck
Serabyn, Eugene
Westall, Frances
White, Glenn
Ollivier, Marc
Borde, Pascale
TI Darwin-an experimental astronomy mission to search for extrasolar
planets
SO EXPERIMENTAL ASTRONOMY
LA English
DT Article
DE Interferometer; Nulling interferometry; Direct imaging of exoplanets;
Exoplanets; Habitable zone
ID NULLING INTERFEROMETERS; SYSTEMATIC-ERRORS
AB As a response to ESA call for mission concepts for its Cosmic Vision 2015-2025 plan, we propose a mission called Darwin. Its primary goal is the study of terrestrial extrasolar planets and the search for life on them. In this paper, we describe different characteristics of the instrument.
C1 [Cockell, Charles S.] Open Univ, Planetary & Space Sci Res Inst, Milton Keynes MK7 6AA, Bucks, England.
[Herbst, Tom; Henning, Thomas; Labadie, Lucas; Launhardt, Ralf] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Leger, Alain; Chazelas, Bruno; Ollivier, Marc; Borde, Pascale] Univ Paris 11, IAS, F-91405 Orsay, France.
[Absil, O.] Lab Astrophys Observ Grenoble, F-38400 St Martin Dheres, France.
[Beichman, Charles] CALTECH, Michelson Sci Ctr, Pasadena, CA 91125 USA.
[Benz, Willy] Univ Bern, Inst Phys, Bern, Switzerland.
[Brack, Andre; Westall, Frances] CNRS, Ctr Biophys Mol, F-45071 Orleans 2, France.
[Chelli, Alain] Lab Astrophys Grenoble LAOG, F-38041 Grenoble 9, France.
[Cottin, Herve] Univ Paris 12, CNRS, UMR 7583 91, Lab Interuniv Syst Atmospher, F-94010 Creteil, France.
[du Foresto, Vincent Coude; Rouan, Daniel] Observ Paris, PHASE, LESIA, F-92190 Meudon, France.
[Danchi, William] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
[Defrere, Denis] Inst Astrophys & Geophys Liege, F-4000 Liege, Belgium.
[den Herder, Jan-Willem] SRON Netherlands Inst Space Res, NL-3584 CA Utrecht, Netherlands.
[Eiroa, Carlos] Univ Autonoma Madrid, Fac Ciencias, Dpto Fis Toer CXI, E-28049 Madrid, Spain.
[Fridlund, Malcolm] Estec, European Space Agcy, Astrophys Mission Div, NL-2200 AG Noordwijk, Netherlands.
[Johnston, Kenneth] USN Observ, Washington, DC 20392 USA.
[Kaltenegger, Lisa] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Lammer, Helmut] Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria.
[Lawson, Peter; Lay, Oliver P.; Martin, Stefan R.; Mawet, Dimitri; Serabyn, Eugene] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Liseau, Rene'] Chalmers, Onsala Space Observ, SE-43992 Onsala, Sweden.
[Rabbia, Yves] CNRS, Dpt GEMINI, UMR 6203, Observ Cote Azur, F-06130 Grasse, France.
[Moutou, Claire] CNRS, LAM, F-13376 Marseille 12, France.
[Mugnier, Laurent] DOTA, ONERA, F-92322 Chatillon, France.
[Paresce, Francesco] INAF, IASF Bologna, Bologna, Italy.
[Quirrenbach, Andreas] Univ Heidelberg, ZAH, D-69117 Heidelberg, Germany.
[Rottgering, Huub J. A.] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands.
[Santos, Nuno] Univ Porto, Ctr Astrofis, P-4150762 Oporto, Portugal.
[Selsis, Franck] Univ Lyon, Ecole Super Lyon, CNRS, CRAL,UMR 5574, F-69007 Lyon, France.
[White, Glenn] Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England.
[White, Glenn] Rutherford Appleton Lab, CCLRC, Space Sci & Technol Dept, Didcot OX11 0QX, Oxon, England.
RP Cockell, CS (reprint author), Open Univ, Planetary & Space Sci Res Inst, Milton Keynes MK7 6AA, Bucks, England.
EM c.s.cockell@open.ac.uk
RI Santos, Nuno/E-9957-2011; Mugnier, Laurent/A-7630-2012; Cottin,
Herve/H-5654-2013;
OI Santos, Nuno/0000-0003-4422-2919; Cottin, Herve/0000-0001-9170-5265;
Mugnier, Laurent/0000-0002-8364-4957; Absil, Olivier/0000-0002-4006-6237
NR 16
TC 29
Z9 29
U1 0
U2 8
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0922-6435
J9 EXP ASTRON
JI Exp. Astron.
PD MAR
PY 2009
VL 23
IS 1
BP 435
EP 461
DI 10.1007/s10686-008-9121-x
PG 27
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 409KZ
UT WOS:000263505900019
ER
PT J
AU Appourchaux, T
Liewer, P
Watt, M
Alexander, D
Andretta, V
Auchere, F
D'Arrigo, P
Ayon, J
Corbard, T
Fineschi, S
Finsterle, W
Floyd, L
Garbe, G
Gizon, L
Hassler, D
Harra, L
Kosovichev, A
Leibacher, J
Leipold, M
Murphy, N
Maksimovic, M
Martinez-Pillet, V
Matthews, BSA
Mewaldt, R
Moses, D
Newmark, J
Regnier, S
Schmutz, W
Socker, D
Spadaro, D
Stuttard, M
Trosseille, C
Ulrich, R
Velli, M
Vourlidas, A
Wimmer-Schweingruber, CR
Zurbuchen, T
AF Appourchaux, T.
Liewer, P.
Watt, M.
Alexander, D.
Andretta, V.
Auchere, F.
D'Arrigo, P.
Ayon, J.
Corbard, T.
Fineschi, S.
Finsterle, W.
Floyd, L.
Garbe, G.
Gizon, L.
Hassler, D.
Harra, L.
Kosovichev, A.
Leibacher, J.
Leipold, M.
Murphy, N.
Maksimovic, M.
Martinez-Pillet, V.
Matthews, B. S. A.
Mewaldt, R.
Moses, D.
Newmark, J.
Regnier, S.
Schmutz, W.
Socker, D.
Spadaro, D.
Stuttard, M.
Trosseille, C.
Ulrich, R.
Velli, M.
Vourlidas, A.
Wimmer-Schweingruber, C. R.
Zurbuchen, T.
TI POLAR investigation of the Sun-POLARIS
SO EXPERIMENTAL ASTRONOMY
LA English
DT Article
DE Solar physics; Magnetism; Interior; Corona; Polar observations; Coronal
mass ejections; Dynamo; Solar cycle; Convection; High latitude; Space
weather
ID UPPER CONVECTION ZONE; SOLAR-WIND; ACTIVE-REGION; OSCILLATIONS; ORIGIN
AB The POLAR Investigation of the Sun (POLARIS) mission uses a combination of a gravity assist and solar sail propulsion to place a spacecraft in a 0.48 AU circular orbit around the Sun with an inclination of 75A degrees with respect to solar equator. This challenging orbit is made possible by the challenging development of solar sail propulsion. This first extended view of the high-latitude regions of the Sun will enable crucial observations not possible from the ecliptic viewpoint or from Solar Orbiter. While Solar Orbiter would give the first glimpse of the high latitude magnetic field and flows to probe the solar dynamo, it does not have sufficient viewing of the polar regions to achieve POLARIS's primary objective: determining the relation between the magnetism and dynamics of the Sun's polar regions and the solar cycle.
C1 [Appourchaux, T.; Auchere, F.; Leibacher, J.; Trosseille, C.] Inst Astrophys Spatiale, Orsay, France.
[Liewer, P.; Ayon, J.; Murphy, N.; Velli, M.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
[Watt, M.; D'Arrigo, P.; Stuttard, M.] EADS Astrium, Stevenage, Herts, England.
[Alexander, D.] Rice Univ, Houston, TX USA.
[Andretta, V.; Fineschi, S.] Osserv Astron Capodimonte, INAF, I-80131 Naples, Italy.
[Corbard, T.] Observ Cote Azur, F-06003 Nice, France.
[Finsterle, W.; Schmutz, W.] PMOD WRC, Davos, Switzerland.
[Floyd, L.] Interferometrics Inc, Herndon, VA USA.
[Garbe, G.] Natl Space Sci & Technol Ctr, Huntsville, AL USA.
[Gizon, L.] Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany.
[Hassler, D.] SW Res Inst, Boulder, CO USA.
[Kosovichev, A.] Stanford Univ, Stanford, CA 94305 USA.
[Leibacher, J.] Natl Opt Astron Observ, Natl Solar Observ, Tucson, AZ 85726 USA.
[Leipold, M.] Kayser Threde GmbH, Munich, Germany.
[Maksimovic, M.] Observ Paris, Meudon, France.
[Martinez-Pillet, V.] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain.
[Moses, D.; Newmark, J.; Socker, D.; Vourlidas, A.] USN, Res Lab, Washington, DC 20375 USA.
[Spadaro, D.] Osserv Astrofis Catania, INAF, I-95125 Catania, Italy.
[Ulrich, R.] Univ Calif Los Angeles, Los Angeles, CA USA.
[Wimmer-Schweingruber, C. R.] Univ Kiel, Kiel, Germany.
[Zurbuchen, T.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Regnier, S.] Univ St Andrews, St Andrews, Fife, Scotland.
[Harra, L.; Matthews, B. S. A.] Mullard Space Sci Lab, Holmbury, England.
RP Appourchaux, T (reprint author), Inst Astrophys Spatiale, Orsay, France.
EM Thierry.Appourchaux@ias.u-psud.fr
RI Gizon, Laurent/B-9457-2008; Vourlidas, Angelos/C-8231-2009; Matthews,
Sarah/C-4292-2008; Regnier, Stephane/H-9107-2012; Schmutz,
Werner/B-4153-2014; Regnier, Stephane/K-2423-2015;
OI Leibacher, John/0000-0001-7605-3684; Vourlidas,
Angelos/0000-0002-8164-5948; Regnier, Stephane/0000-0001-8954-4183;
Schmutz, Werner/0000-0003-1159-5639; Regnier,
Stephane/0000-0001-8954-4183; Harra, Louise/0000-0001-9457-6200;
Auchere, Frederic/0000-0003-0972-7022; Spadaro,
Daniele/0000-0003-3517-8688; Andretta, Vincenzo/0000-0003-1962-9741
NR 35
TC 7
Z9 8
U1 0
U2 4
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0922-6435
J9 EXP ASTRON
JI Exp. Astron.
PD MAR
PY 2009
VL 23
IS 3
BP 1079
EP 1117
DI 10.1007/s10686-008-9107-8
PG 39
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 409RP
UT WOS:000263523800014
ER
PT J
AU He, T
Spence, GD
Wood, WT
Riedel, M
Hyndman, RD
AF He, Tao
Spence, George D.
Wood, Warren T.
Riedel, Michael
Hyndman, Roy D.
TI Imaging a hydrate-related cold vent offshore Vancouver Island from
deep-towed multichannel seismic data
SO GEOPHYSICS
LA English
DT Article
ID CASCADIA SUBDUCTION ZONE; METHANE HYDRATE; GAS HYDRATE; SEA-FLOOR;
SEDIMENTS; EXPULSION; MARGIN
AB The Bullseye vent, an approximately 500-m-diameter deep-sea, hydrate-related cold vent on the midslope offshore Vancouver Island, was imaged in a high-resolution multichannel survey by the Deep-towed Acoustics and Geophysics System (DTAGS) The structure was drilled by the Integrated Ocean Drilling Program at site U1328. Towed about 300 m above the seafloor, the high-frequency (220-820 Hz) DTAGS system provides a high vertical and lateral resolution image. The major problems in imaging with DTAGS data are nonlinear variations of the source depths and receiver locations. The high-frequency, short-wavelength data require very accurate positioning of source and receivers for stacking and velocity analyses. New routines were developed for optimal processing, including receiver cable geometry estimation from node depths, direct arrivals and sea-surface reflections using a genetic algorithm inversion method, and acoustic image stitching based on relative source positioning by crosscorrelating redundant data between two adjacent shots. Semblance seismic velocity analysis was applied to common-reflection-point bins of the corrected data. The processed images resolve many subvertical zones of low seismic reflectivity and fine details of subseafloor sediment structure. At the Bullseye vent, where a 40-m-thick near-surface massive hydrate layer was drilled at U1328, the images resolve the upper part of the layer as a dipping high-reflectivity zone, likely corresponding to a fracture zone. Velocity analyses were not possible in the vent structure but were obtained 180-270 m to either side. Normal velocities are in the upper 50 m, but over the interval from 50 to 100 m below the seafloor at the northeast side, the velocities are higher than the average normal slope sediment velocity of approximately 1590 m/s. These high velocities are probably related to the high reflectivity zone and to the bottom portion of the massive hydrate detected by resistivity measurements in the upper 40 m at U1328.
C1 [He, Tao] Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, MOE, Beijing 100871, Peoples R China.
[He, Tao; Spence, George D.; Hyndman, Roy D.] Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC, Canada.
[Wood, Warren T.] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Riedel, Michael] McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ, Canada.
[Hyndman, Roy D.] Geol Survey Canada, Pacific Geosci Ctr, Sidney, BC V8L 4B2, Canada.
RP He, T (reprint author), Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, MOE, Beijing 100871, Peoples R China.
EM taohe@pku.edu.cn; warren.wood@nrlssc.navy.mil; mriedel@eps.mcgill.ca;
RHyndman@NRCan.gc.ca
FU U. S. Naval Research Laboratory [61153N]; Geological Survey of Canada,;
Natural Sciences and Engineering Research Council; Naval Research
Laboratory; Natural Resources Canada, Earth Science Sector publication
[20080061]
FX Captain Paul Frost and the crew of the CCGS J. P. Tully are gratefully
acknowledged for their skill and flexibility. We sincerely thank Bob
MacDonald of Pacific Geoscience Centre and Ivan Frydecky for their
essential contributions to shipboard data collection. This research was
supported by funds from the U. S. Naval Research Laboratory (ONR program
element 61153N), the Geological Survey of Canada, and the Natural
Sciences and Engineering Research Council. This paper is a Naval
Research Laboratory contribution and a Geological Survey of Canada
publication (Natural Resources Canada, Earth Science Sector publication
20080061). We are also grateful to Seismic Micro-Technology Inc. for the
use of The Kingdom Suite.
NR 33
TC 8
Z9 9
U1 0
U2 4
PU SOC EXPLORATION GEOPHYSICISTS
PI TULSA
PA 8801 S YALE ST, TULSA, OK 74137 USA
SN 0016-8033
J9 GEOPHYSICS
JI Geophysics
PD MAR-APR
PY 2009
VL 74
IS 2
BP B23
EP B36
DI 10.1190/1.3072620
PG 14
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 421QX
UT WOS:000264374500002
ER
PT J
AU Randall, LM
Monk, BJ
Darcy, KM
Tian, CQ
Burger, RA
Liao, SY
Peters, WA
Stock, RJ
Fruehauf, JP
AF Randall, Leslie M.
Monk, Bradley J.
Darcy, Kathleen M.
Tian, Chunqiao
Burger, Robert A.
Liao, Shu-Yuan
Peters, William A.
Stock, Richard J.
Fruehauf, John P.
TI Markers of angiogenesis in high-risk, early-stage cervical cancer: A
Gynecologic Oncology Group study
SO GYNECOLOGIC ONCOLOGY
LA English
DT Article
DE Angiogenesis; Cervical cancer; GOG; Angiogenic markers
ID ENDOTHELIAL GROWTH-FACTOR; SQUAMOUS-CELL CARCINOMA; TUMOR ANGIOGENESIS;
MICROVESSEL DENSITY; UTERINE CERVIX; FACTOR EXPRESSION; PROGNOSTIC
VALUE; POOR-PROGNOSIS; THROMBOSPONDIN-1; P53
AB Objectives. To determine whether markers of tumor angiogenesis were associated with progression-free survival (PFS) and overall survival (OS) in women with high-risk, early-stage cervical cancer treated on a phase III trial.
Methods. One hundred seventy-three tumor specimens were analyzed by semi-quantitative immunohistochemical (IHC) staining for vascular endothelial growth factor (VEGF, pro-angiogenesis factor), thrombospondin-1 (TSP-1, anti-angiogenesis factor), CD31 (non-specific endothelial marker), and CD105 (tumor-specific endothelial marker). Tumoral histoscores (HS) were calculated for VEGF using the formula: [% cells positive x (intensity+1)]. TSP-1 specimens were categorized as negative or positive. CD31 and CD105 microvessel density (MVD) "hotspots" were counted in three 20x high-power fields. Associations between angiogenesis markers and survival were evaluated.
Results. TSP-1 expression was observed in 65% of cases while 66% expressed high VEGF (>= 200), 34% exhibited high CD31 (CD31 >= 110) and 66% displayed high CD105 (CD105 >= 28). In univariate analyses CD31 MVD, but not tumor TSP-1, was associated with improved PFS (HR=0.37; 95%. CI=0.18-0.76: p=0.007) and OS (HR=037; 95% CI=0.17-0.79; p=0.010). After adjusting for prognostic clinical covariates, high CD31 MVD, but not TSP-1 VEGF or CD 105 MVD, was an independent prognostic factor for PFS (HR=0.36: 95%. CI=0.17-0.75: p=0.006) and OS (HR=0.36; 95% CI=0.17-0.79; p=0.010).
Conclusions. Tumor angiogenesis measured by CD31 MVD is an independent prognostic factor for both PFS and OS in high-risk, early-stage cervical cancer. We hypothesize that this finding may be explained by improved treatment response in well-vascularized, well-oxygenated tumors. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Fruehauf, John P.] Univ Calif Irvine, Med Ctr, Div Hematol Oncol, Dept Med,Chao Family Comprehens Canc Ctr, Orange, CA 92868 USA.
[Darcy, Kathleen M.; Tian, Chunqiao] Roswell Pk Canc Inst, GOG Stat & Data Ctr, Buffalo, NY USA.
[Liao, Shu-Yuan] St Joseph Hosp, Dept Pathol, Orange, CA USA.
[Peters, William A.] Univ Washington, Seattle, WA 98195 USA.
[Stock, Richard J.] Eastern Virginia Med Sch, Norfolk, VA 23501 USA.
[Stock, Richard J.] USN, Med Ctr, Portsmouth, VA USA.
RP Fruehauf, JP (reprint author), Univ Calif Irvine, Med Ctr, Div Hematol Oncol, Dept Med,Chao Family Comprehens Canc Ctr, Orange, CA 92868 USA.
EM jfruehau@uci.edu
FU National Cancer Institute; GOG Tissue Bank [CA 27469]; GOG Statistical
and Data Center [CA 37517, K23 CA 087558]
FX This study was supported by National Cancer Institute grants to the
Gynecologic Oncology Group (GOG) and the GOG Tissue Bank (CA 27469), the
GOG Statistical and Data Center (CA 37517), and Dr. Monk (K23 CA
087558). The following Gynecologic Oncology Group member institutions
participated in the primary treatment studies: University of Alabama at
Birmingham, Oregon Health Sciences University, Duke University Medical
Center, Walter Reed Medical Center, Wayne State University, University
of Southern California at Los Angeles, University of Pennsylvania Cancer
Center, University of Miami School of Medicine, Milton S. Hershey
Medical Center, Georgetown University Hospital, University of
Cincinnati, University of North Carolina School of Medicine, University
of Iowa Hospitals and Clinics, University of Texas Southwestern Medical
Center at Dallas, Indiana University Medical Centel-, Wake Forest
University School of Medicine, University of California Medical Center
at Irvine, Tufts-New England Medical Center, Rush University Medical
Center, SUNY Downstate Medical Center, Eastern Virginia Medical School,
Johns Hopkins Cancer Center, State University of New York at Stony
Brook, Washington University School of Medicine, Cooper
Hospital/University Medical Center, Columbus Cancer Council, M. D.
Anderson Cancer Center, University of Massachusetts Medical School, Fox
Chase Cancer Center, Women's Cancer Center, University of Oklahoma,
University of Virginia Health Sciences Center, University of Chicago,
University of Arizona and Case Western Reserve University.
NR 43
TC 41
Z9 46
U1 1
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-8258
J9 GYNECOL ONCOL
JI Gynecol. Oncol.
PD MAR
PY 2009
VL 112
IS 3
BP 583
EP 589
DI 10.1016/j.ygyno.2008.11.013
PG 7
WC Oncology; Obstetrics & Gynecology
SC Oncology; Obstetrics & Gynecology
GA 418QH
UT WOS:000264162800028
PM 19110305
ER
PT J
AU Shen, YC
AF Shen, Yu-Chu
TI DO HMO AND ITS FOR-PROFIT EXPANSION JEOPARDIZE THE SURVIVAL OF HOSPITAL
SAFETY NET SERVICES?
SO HEALTH ECONOMICS
LA English
DT Article
DE managed care; hospital safety net services; proportional hazard models;
for-profit ownership
ID MANAGED CARE; HEALTH-CARE; TECHNOLOGY ADOPTION; COMPETITION; MARKETS
AB This study examines the effect of health maintenance organizations (HMOs) and for-profit HMO share on the Survival of safety net services in hospitals between 1990 and 2004. The primary data sources are the American Hospital Association Annual Surveys, the Medicare hospital cost reports, and the HMO enrollment and ownership data from Interstudy. I analyze the risks of shutting down each safety net service separately using the proportional hazard models. I find that the risks of shutting down hospital safety net services do not vary by different levels of overall HMO penetration. However, conditional on the overall HMO penetration level, increasing for-profit presence of HMO does increase the risks of shutting down several safety net services. Policies evaluating the for-profit expansion or ownership conversion of health plans should take this potential adverse effect into consideration. Copyright (C) 2008 John Wiley & Sons, Ltd.
C1 [Shen, Yu-Chu] USN, Postgrad Sch, Monterey, CA USA.
[Shen, Yu-Chu] Natl Bur Econ Res, Cambridge, MA 02138 USA.
RP Shen, YC (reprint author), USN, Postgrad Sch, Code GB,555 Dyer Rd, Monterey, CA USA.
EM ysheu@nps.edu
FU Naval Postgraduate School Research Initiation Program
FX I would like to thank the Naval Postgraduate School Research Initiation
Program for funding this research, Shou-Tzu Lin for the excellent
programing assistance, Drs Laurence Baker and Glenn Melnick for their
data, and participants at the research-in-progress seminar at Stanford
University for their helpful comments. There is no conflict of interest,
financial or otherwise, in the preparation of this manuscript.
NR 21
TC 4
Z9 4
U1 1
U2 4
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1057-9230
J9 HEALTH ECON
JI Health Econ.
PD MAR
PY 2009
VL 18
IS 3
BP 305
EP 320
DI 10.1002/hec.1366
PG 16
WC Economics; Health Care Sciences & Services; Health Policy & Services
SC Business & Economics; Health Care Sciences & Services
GA 413UE
UT WOS:000263817200006
PM 18566971
ER
PT J
AU Chu, PC
AF Chu, Peter C.
TI Statistical Characteristics of the Global Surface Current Speeds
Obtained From Satellite Altimetry and Scatterometer Data
SO IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE
SENSING
LA English
DT Article
DE Altimetry; probability; satellites; scattering; sea surface; stochastic
processes
ID REGIONAL OCEAN MODELS; STOCHASTIC STABILITY
AB Near-real time ocean surface currents derived from satellite altimeter (JASON-1, GFO, ENVISAT) and scatterometer (QSCAT) data on 1 degrees x 1 degrees resolution for world oceans (60 degrees S to 60 degrees N) are available online as "Ocean Surface Current Analyses-Real Time (OSCAR)." The probability distribution function (PDF) of the current speeds (w), constructed from global OSCAR data from 1992 to 2008, satisfies the two-parameter Weibull distribution reasonably well, and such a PDF has little seasonal and interannual variations. Knowledge on PDF of w will improve the ensemble horizontal flux calculation, which contributes to the climate studies.
C1 USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
RP Chu, PC (reprint author), USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
EM pcchu@nps.edu
NR 9
TC 13
Z9 13
U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1939-1404
J9 IEEE J-STARS
JI IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.
PD MAR
PY 2009
VL 2
IS 1
BP 27
EP 32
DI 10.1109/JSTARS.2009.2014474
PG 6
WC Engineering, Electrical & Electronic; Geography, Physical; Remote
Sensing; Imaging Science & Photographic Technology
SC Engineering; Physical Geography; Remote Sensing; Imaging Science &
Photographic Technology
GA 446II
UT WOS:000266114900004
ER
PT J
AU Garfinkel, SL
Migletz, JJ
AF Garfinkel, Simson L.
Migletz, James J.
TI New XML-based Files
SO IEEE SECURITY & PRIVACY
LA English
DT Article
C1 [Garfinkel, Simson L.] US Naval Postgrad Sch, Monterey, CA USA.
[Garfinkel, Simson L.] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA.
RP Garfinkel, SL (reprint author), US Naval Postgrad Sch, Monterey, CA USA.
NR 12
TC 5
Z9 5
U1 0
U2 1
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 1540-7993
J9 IEEE SECUR PRIV
JI IEEE Secur. Priv.
PD MAR-APR
PY 2009
VL 7
IS 2
BP 38
EP 44
PG 7
WC Computer Science, Information Systems; Computer Science, Software
Engineering
SC Computer Science
GA 425LW
UT WOS:000264640200007
ER
PT J
AU Canning, JS
AF Canning, John S.
TI "You've Just Been Disarmed. Have a Nice Day!"
SO IEEE TECHNOLOGY AND SOCIETY MAGAZINE
LA English
DT Article
C1 USN, Ctr Surface Warfare, Dahlgren, VA 22448 USA.
RP Canning, JS (reprint author), USN, Ctr Surface Warfare, Dahlgren, VA 22448 USA.
EM john.s.canning@navy.mil
NR 2
TC 4
Z9 4
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0278-0097
J9 IEEE TECHNOL SOC MAG
JI IEEE Technol. Soc. Mag.
PD SPR
PY 2009
VL 28
IS 1
BP 12
EP 15
DI 10.1109/MTS.2009.931864
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA 421ZS
UT WOS:000264397400004
ER
PT J
AU Garven, M
Calame, JP
AF Garven, Morag
Calame, Jeffrey P.
TI Simulation and Optimization of Gate Temperatures in GaN-on-SiC
Monolithic Microwave Integrated Circuits
SO IEEE TRANSACTIONS ON COMPONENTS AND PACKAGING TECHNOLOGIES
LA English
DT Article
DE GaN; high electron mobility transistor (HEMT); microchannel cooler;
monolithic microwave integrated circuit (MMIC) amplifiers; SiC; thermal
management
ID MICROCHANNEL COOLERS; THERMAL MANAGEMENT; DEVICES; OPERATION; DESIGN;
HEMTS
AB This paper presents 3-D thermal simulation studies of GaN-on-SiC monolithic microwave integrated circuits (MMICs) containing multifinger micrometer-scale high electron mobility transistors (HEMTs). The heat spreading effect of HEMT source, gate, and drain metallizations on; peak structure temperatures is examined. The impacts of a realistic die attach material and rear-of-die heat transfer coefficient on structure temperatures, and in particular on temperature nonuniformity, are examined. Variable gate finger spacing, in which the gate spatial positions are described by polynomials as a function of gate number, is investigated as a means for optimizing the temperature uniformity from gate-to-gate. A thermal simulation code with a parametric MMIC geometry-based mesh generator and a deformable mesh consistent with sequential movement of gate finger positions during optimization is employed for all of the studies. The code is multiscale with a sufficient resolution range to handle a multifinger HEMT structure while also including the MMIC die, die attach metallization, and a realistic heat transfer coefficient associated with microchannel coolers. A variable gate pitch geometry based on an optimized cubic polynomial demonstrates considerable advantage in temperature uniformity.
C1 [Garven, Morag] Sci Applicat Int Corp, Mclean, VA 22012 USA.
[Calame, Jeffrey P.] USN, Res Lab, Washington, DC 20375 USA.
RP Garven, M (reprint author), Sci Applicat Int Corp, Mclean, VA 22012 USA.
EM morag.garven@nrl.navy.mil
FU Office of Naval Research
FX This work was supported by the Office of Naval Research. This work was
recommended for publication by Associate Editor C. Lee upon evaluation
of the reviewers comments.
NR 23
TC 11
Z9 12
U1 3
U2 9
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1521-3331
J9 IEEE T COMPON PACK T
JI IEEE Trans. Compon. Packaging Technol.
PD MAR
PY 2009
VL 32
IS 1
BP 63
EP 72
DI 10.1109/TCAPT.2008.2004586
PG 10
WC Engineering, Manufacturing; Engineering, Electrical & Electronic;
Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA 415IY
UT WOS:000263928700008
ER
PT J
AU Andrews, JR
Restaino, SR
Vandervelde, TE
Brown, JS
Sharma, YD
Lee, SJ
Teare, SW
Reisinger, A
Sundaram, M
Krishna, S
AF Andrews, Jonathan R.
Restaino, Sergio R.
Vandervelde, Thomas E.
Brown, Jay S.
Sharma, Yagya D.
Lee, Sang Jun
Teare, Scott W.
Reisinger, Axel
Sundaram, Mani
Krishna, Sanjay
TI Comparison of Long-Wave Infrared Quantum-Dots-in-a-Well and Quantum-Well
Focal Plane Arrays
SO IEEE TRANSACTIONS ON ELECTRON DEVICES
LA English
DT Article
DE Infrared image sensors; quantum dots (QDs); quantum wells; radiometry
ID WAVELENGTH; PHOTODETECTORS
AB This paper reports on a comparison between a commercially available quantum-well infrared focal plane array (FPA) and a custom quantum-dot (QD)-in-a-well (DWELL) infrared FPA in the long-wave infrared (LWIR). The DWELL detectors consist of an active region composed of InAs QDs embedded in In(.15)Ga(.85) As quantum wells. DWELL samples were grown using molecular beam epitaxy and fabricated into 320 x 256 pixels FPA with a flip-chip indium bump technique. Both the DWELL and QmagiQ commercial quantum-well detector were hybridized to an Indigo ISC9705 readout circuit and tested in the same camera system. Calibrated blackbody measurements at a device temperature of 60 K with LWIR optics yield a noise equivalent change in temperature of 17 mK and 91 mK for quantum-well and DWELL FPAs operating at 0.95- and 0.58-V biases, respectively. The comparison of the DWELL and quantum-well FPA when imaging a 35 degrees C black body showed that the DWELL had a signal-to-noise ratio of 124 while the quantum-well FPA showed 1961. As well, the quantum-well FPA showed a higher collection efficiency of 1.3 compared to the DWELL.
C1 [Andrews, Jonathan R.; Restaino, Sergio R.] USN, Res Lab, Remote Sensing Div, Kirtland AFB, NM 87117 USA.
[Vandervelde, Thomas E.; Brown, Jay S.; Sharma, Yagya D.; Krishna, Sanjay] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA.
[Lee, Sang Jun] Korea Res Inst Stand & Sci, Ctr Adv Measurement & Instrumentat, Taejon 305340, South Korea.
[Teare, Scott W.] New Mexico Inst Min & Technol, Dept Elect Engn, Socorro, NM 87801 USA.
[Reisinger, Axel; Sundaram, Mani] QmagiQ LLC, Nashua, NH 03063 USA.
RP Andrews, JR (reprint author), USN, Res Lab, Remote Sensing Div, Kirtland AFB, NM 87117 USA.
EM jonathan.andrews@kirtiand.af.mil; sergio.restaino@kirtland.af.mil;
teare@ee.nmt.edu; areisinger@qmaiq.com; skrishna@chtm.unm.edu
RI Krishna, Sanjay /C-5766-2009; Sharma, Yagya/E-4921-2010; Vandervelde,
Tom/I-3317-2013
NR 13
TC 6
Z9 6
U1 0
U2 3
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 MAR
PY 2009
VL 56
IS 3
BP 512
EP 516
DI 10.1109/TED.2008.2011725
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA 416PZ
UT WOS:000264019300020
ER
PT J
AU Bachmann, CM
Ainsworth, TL
Fusina, RA
Montes, MJ
Bowles, JH
Korwan, DR
Gillis, DB
AF Bachmann, Charles M.
Ainsworth, Thomas L.
Fusina, Robert A.
Montes, Marcos J.
Bowles, Jeffrey H.
Korwan, Daniel R.
Gillis, David B.
TI Bathymetric Retrieval From Hyperspectral Imagery Using Manifold
Coordinate Representations
SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
LA English
DT Article
DE Bathymetry; bottom type; hyperspectral imagery; isometric mapping;
manifold coordinates; manifold learning; nonlinear estimation; optical
data processing; optical image processing; remote sensing; spectral
analysis; spectroscopy; water
ID SHALLOW WATERS; ORASIS
AB In this paper, we examine the accuracy of manifold coordinate representations as a reduced representation of a hyperspectral imagery (HSI) lookup table (LUT) for bathymetry retrieval. We also explore on a more limited basis the potential for using these coordinates for modeling other in water properties. Manifold coordinates are chosen because they are a data-driven intrinsic set of coordinates, which naturally parameterize nonlinearities that are present in HSI of water scenes. The approach is based on the extraction of a reduced dimensionality representation in manifold coordinates of a sufficiently large representative set of HSI. The manifold coordinates are derived from a scalable version of the isometric mapping algorithm. In the present and in our earlier works, these coordinates were used to establish an interpolating LUT for bathymetric retrieval by associating the representative data with ground truth data, in this case from a Light Detection and Ranging (LIDAR) estimate in the representative area. While not the focus of the present paper, the compression of LUTs could also be applied, in principle, to LUTs generated by forward radiative transfer models, and some preliminary work in this regard confirms the potential utility for this application. In this paper, we analyze the approach using data acquired by the Portable Hyperspectral Imager for Low-Light Spectroscopy (PHILLS) hyperspectral camera over the Indian River Lagoon, Florida, in 2004. Within a few months of the PHILLS overflights, Scanning Hydrographic Operational Airborne LIDAR Survey, LIDAR data were obtained for a portion of this study area, principally covering the beach zone and, in some instances, portions of contiguous river channels. Results demonstrate that significant compression of the LUTs is possible with little loss in retrieval accuracy.
C1 [Bachmann, Charles M.; Fusina, Robert A.; Montes, Marcos J.] USN, Res Lab, Remote Sensing Div Code 7232, Washington, DC 20375 USA.
[Ainsworth, Thomas L.] USN, Res Lab, Remote Sensing Div Code 7263, Washington, DC 20375 USA.
[Bowles, Jeffrey H.; Korwan, Daniel R.; Gillis, David B.] USN, Res Lab, Remote Sensing Div Code 7231, Washington, DC 20375 USA.
RP Bachmann, CM (reprint author), USN, Res Lab, Remote Sensing Div Code 7232, Washington, DC 20375 USA.
EM bachmann@nrl.navy.mil; ainsworth@nrl.navy.mil; fusina@nrl.navy.mil;
montes@nrl.navy.mil; jeffrey.bowles@nrl.navy.mil; korwan@nrl.navy.mil;
david.gillis@nrl.navy.mil
RI Montes, Marcos/J-9239-2015
OI Montes, Marcos/0000-0002-4725-5380
FU National Geospatial-Intelligence Agency; Office of Naval Research
[0601153N, BE032-08-41]
FX Manuscript received October 1, 2007; revised May 15, 2008. Current
version published February 19, 2009. This work was supported by the
National Geospatial-Intelligence Agency. The work of C. M. Bachmann, T.
L. Ainsworth, R. A. Fusina, and M. J. Montes was supported by the Office
of Naval Research under Program Element 0601153N and Tas rea
BE032-08-41.
NR 50
TC 22
Z9 25
U1 0
U2 16
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0196-2892
J9 IEEE T GEOSCI REMOTE
JI IEEE Trans. Geosci. Remote Sensing
PD MAR
PY 2009
VL 47
IS 3
BP 884
EP 897
DI 10.1109/TGRS.2008.2005732
PG 14
WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote
Sensing; Imaging Science & Photographic Technology
SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science
& Photographic Technology
GA 415JA
UT WOS:000263928900018
ER
PT J
AU Lord, SF
Firebaugh, SL
Smith, AN
AF Lord, Scott Frederick
Firebaugh, Samara L.
Smith, Andrew N.
TI Remote Measurement of Temperature in the Presence of a Strong Magnetic
Field
SO IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
LA English
DT Article
DE Interferometry; nickel; pulse power systems; sapphire; temperature
measurement; thin films
ID TRANSPARENT; SAPPHIRE
AB This paper describes the development of a temperature sensor suitable for use in a pulse power system. Such systems generate large time-varying magnetic fields, which complicate instrumentation. A temperature-sensing system has been developed that can remotely capture information necessary to determine the temperature of a surface in the presence of a strong electromagnetic field. This sensor is based on an interferometer using a thin sapphire die coated with nickel and nickel oxide as the sensing element. A model was developed to predict the behavior of the sensor to determine the ideal layer thickness. With this system, temperature measurement has been demonstrated in the presence of a large time-varying magnetic field at a sampling rate of 1000 Hz over a range of 20 degrees C to 350 degrees C.
C1 [Lord, Scott Frederick; Firebaugh, Samara L.; Smith, Andrew N.] USN Acad, Annapolis, MD 21402 USA.
RP Lord, SF (reprint author), USN Acad, Annapolis, MD 21402 USA.
EM firebaug@usna.edu
NR 8
TC 2
Z9 2
U1 1
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9456
J9 IEEE T INSTRUM MEAS
JI IEEE Trans. Instrum. Meas.
PD MAR
PY 2009
VL 58
IS 3
BP 674
EP 680
DI 10.1109/TIM.2008.2005074
PG 7
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 406LW
UT WOS:000263298000023
ER
PT J
AU Rauscher, C
Kirchoefer, SW
Pond, JM
Guyette, AC
Jachowski, DR
AF Rauscher, Christen
Kirchoefer, Steven W.
Pond, Jeffrey M.
Guyette, Andrew C.
Jachowski, Douglas R.
TI A Compact Ridge-Waveguide Contiguous-Channel Frequency Multiplexer
SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
LA English
DT Article
DE Evanescent-mode waveguide; filter bank; frequency multiplexer; high
power; ridge waveguide; waveguide filter; waveguide manifold
ID FILTERS
AB The experimental 4-6.25-GHz contiguous-channel frequency multiplexer being presented comprises three equal-bandwidth four-pole ridge-waveguide channel filters that are series-connected through a quasi-low-pass ridge-waveguide manifold. To minimize insertion loss, the multiplexer's port impedance-matching networks are also realized in ridge-waveguide, limiting the use of strip-type transmission line segments to short uniform-width microstrip feeder lines for linking to the multiplexer's external coaxial ports. The three channel filters are stacked with their waveguide broadsides adjacent to each other, separated only by the thicknesses of the filters' walls to achieve maximum compactness. Quasi-lumped waveguide elements are employed to properly couple the filters to the manifold. The multiplexer design methodology relies on the use of commercial general-purpose software, and on equivalent-circuit models or waveguide multiplexer subcomponents derived therewith. The observed good agreement between measured and predicted multiplexer response characteristics helps to validate the approach.
C1 [Rauscher, Christen; Kirchoefer, Steven W.; Pond, Jeffrey M.; Guyette, Andrew C.; Jachowski, Douglas R.] USN, Res Lab, Washington, DC 20375 USA.
RP Rauscher, C (reprint author), USN, Res Lab, Code 6850, Washington, DC 20375 USA.
NR 11
TC 2
Z9 2
U1 1
U2 7
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0018-9480
J9 IEEE T MICROW THEORY
JI IEEE Trans. Microw. Theory Tech.
PD MAR
PY 2009
VL 57
IS 3
BP 647
EP 656
DI 10.1109/TMTT.2009.2013288
PG 10
WC Engineering, Electrical & Electronic
SC Engineering
GA 420MZ
UT WOS:000264295200016
ER
PT J
AU Stack, JR
Dobeck, GJ
Liao, XJ
Carin, L
AF Stack, Jason R.
Dobeck, Gerald J.
Liao, Xuejun
Carin, Lawrence
TI Kernel-Matching Pursuits With Arbitrary Loss Functions
SO IEEE TRANSACTIONS ON NEURAL NETWORKS
LA English
DT Article
DE Boosting; imbalanced data; iteratively reweighted least squares; kernel
machines; kernel-matching pursuits (KMPs); margin maximization; robust
classification; robust statistics; unbalanced data
ID REWEIGHTED LEAST-SQUARES; SUPPORT VECTOR MACHINES; ALGORITHMS
AB The purpose of this research is to develop a classifier capable of state-of-the-art performance in both computational efficiency and generalization ability while allowing the algorithm designer to choose arbitrary loss functions as appropriate for a give problem domain. This is critical in applications involving heavily imbalanced, noisy, or non-Gaussian distributed data. To achieve this goal, a kernel-matching pursuit (KMP) framework is formulated where the objective is margin maximization rather than the standard error minimization. This approach enables excellent performance and computational savings in the presence of large, imbalanced training data sets and facilitates the development of two general algorithms. These algorithms support the use of arbitrary loss functions allowing the algorithm designer to control the degree to which outliers are penalized and the manner in which non-Gaussian distributed data is handled. Example loss functions are provided and algorithm performance is illustrated in two groups of experimental results. The first group demonstrates that the proposed algorithms perform equivalent to several state-of-the-art machine learning algorithms on well-published, balanced data. The second group of results illustrates superior performance by the proposed algorithms on imbalanced, non-Gaussian data achieved by employing loss functions appropriate for the data characteristics and problem domain.
C1 [Stack, Jason R.] Off Naval Res, Ocean Sensing & Syst Applicat Div, Arlington, VA 22203 USA.
[Dobeck, Gerald J.] USN, Ctr Surface Warfare, Panama City, FL 32407 USA.
[Liao, Xuejun; Carin, Lawrence] Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA.
RP Stack, JR (reprint author), Off Naval Res, Ocean Sensing & Syst Applicat Div, Arlington, VA 22203 USA.
EM jason.stack@navy.mil; gerald.dobeck@navy.mil; xjliao@ee.duke.edu;
lcarin@ece.duke.edu
NR 33
TC 3
Z9 3
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1045-9227
J9 IEEE T NEURAL NETWOR
JI IEEE Trans. Neural Netw.
PD MAR
PY 2009
VL 20
IS 3
BP 395
EP 405
DI 10.1109/TNN.2008.2008337
PG 11
WC Computer Science, Artificial Intelligence; Computer Science, Hardware &
Architecture; Computer Science, Theory & Methods; Engineering,
Electrical & Electronic
SC Computer Science; Engineering
GA 413YT
UT WOS:000263831800003
PM 19179248
ER
PT J
AU Livingston, MA
Behringer, R
Kato, H
Drummond, T
AF Livingston, Mark A.
Behringer, Reinhold
Kato, Hirokazu
Drummond, Tom
TI Special Section on The International Symposium on Mixed and Augmented
Reality (ISMAR)
SO IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
LA English
DT Editorial Material
C1 [Livingston, Mark A.] USN, Res Lab, Washington, DC 20375 USA.
[Behringer, Reinhold] Leeds Metropolitan Univ, Leeds LS6 3QS, W Yorkshire, England.
[Kato, Hirokazu] Nara Inst Sci & Technol, Grad Sch Informat Sci, Nara 6300192, Japan.
[Drummond, Tom] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England.
RP Livingston, MA (reprint author), USN, Res Lab, Code 5580 AIT,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM mark.livingston@nrl.navy.mil; r.behringer@leedsmet.ac.uk;
kato@is.naist.jp; twd20@cam.ac.uk
RI Drummond, Tom/A-4696-2011; Behringer, Reinhold/L-2680-2016
OI Drummond, Tom/0000-0001-8204-5904; Behringer,
Reinhold/0000-0002-4788-0792
NR 0
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 1077-2626
J9 IEEE T VIS COMPUT GR
JI IEEE Trans. Vis. Comput. Graph.
PD MAR-APR
PY 2009
VL 15
IS 2
BP 177
EP 178
PG 2
WC Computer Science, Software Engineering
SC Computer Science
GA 392QL
UT WOS:000262317200001
ER
PT J
AU Monteiro, MA
Baqar, S
Hall, ER
Chen, YH
Porter, CK
Bentzel, DE
Applebee, L
Guerry, P
AF Monteiro, Mario A.
Baqar, Shahida
Hall, Eric R.
Chen, Yu-Han
Porter, Chad K.
Bentzel, David E.
Applebee, Lisa
Guerry, Patricia
TI Capsule Polysaccharide Conjugate Vaccine against Diarrheal Disease
Caused by Campylobacter jejuni
SO INFECTION AND IMMUNITY
LA English
DT Article
ID GUILLAIN-BARRE-SYNDROME; NEONATAL FC-RECEPTOR; GANGLIOSIDE MIMICRY;
CHEMICAL-STRUCTURE; GENOME SEQUENCE; SEROTYPES; STRAINS;
LIPOOLIGOSACCHARIDE; LIPOPOLYSACCHARIDES; OLIGOSACCHARIDE
AB The capsule polysaccharide (CPS) of Campylobacter jejuni is one of the few identified virulence determinants of this important human pathogen. Since CPS conjugate vaccines have been so effective against other mucosal pathogens, we evaluated this approach using CPSs from two strains of C. jejuni, 81-176 (HS23 and HS36 serotype complex) and CG8486 (HS4 serotype complex). The CPSs of 81-176 and CG8486 were independently linked to the carrier protein CRM(197) by reductive amination between an aldehyde(s), strategically created at the nonreducing end of each CPS, and accessible amines of CRM(197). In both cases, the CPS: CRM(197) ratio used was 2:1 by weight. Mass spectrometry and gel electrophoresis showed that on average, each glycoconjugate preparation contained, at least in part, two to five CPSs attached to one CRM(197). When administered subcutaneously to mice, these vaccines elicited robust immune responses and significantly reduced the disease following intranasal challenge with the homologous strains of C. jejuni. The CPS(81-176)-CRM(197) vaccine also provided 100% protection against diarrhea in the New World monkey Aotus nancymaae following orogastric challenge with C. jejuni 81-176.
C1 [Baqar, Shahida; Porter, Chad K.; Applebee, Lisa; Guerry, Patricia] USN, Enter Dis Dept, Med Res Ctr, Silver Spring, MD 20910 USA.
[Monteiro, Mario A.; Chen, Yu-Han] Univ Guelph, Dept Chem, Guelph, ON N1G 2W1, Canada.
[Hall, Eric R.; Bentzel, David E.] Naval Med Res Ctr Detachment, Lima, Peru.
RP Guerry, P (reprint author), USN, Enter Dis Dept, Med Res Ctr, 503 Robert Grant Ave, Silver Spring, MD 20910 USA.
EM patricia.guerry@med.navy.mil
RI Porter, Chad/A-8026-2011; Guerry, Patricia/A-8024-2011
FU U. S. Navy Research and Development Command [6000. RAD1.DA3.A0308, 6000.
RAD1. DA3. B0301]; NSERC
FX The views expressed in this article are those of the authors and do not
necessarily reflect the official policy or position of the Department of
the Navy, the Department of Defense, or the U. S. government.
NR 61
TC 38
Z9 38
U1 0
U2 12
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0019-9567
J9 INFECT IMMUN
JI Infect. Immun.
PD MAR
PY 2009
VL 77
IS 3
BP 1128
EP 1136
DI 10.1128/IAI.01056-08
PG 9
WC Immunology; Infectious Diseases
SC Immunology; Infectious Diseases
GA 408DZ
UT WOS:000263416700023
PM 19114545
ER
PT J
AU Cooke, SJ
Botton, M
Antonsen, TM
Levush, B
AF Cooke, S. J.
Botton, M.
Antonsen, T. M., Jr.
Levush, B.
TI A leapfrog formulation of the 3-D ADI-FDTD algorithm
SO INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES
AND FIELDS
LA English
DT Article
DE electromagnetic propagation; FDTD methods; simulation
ID TIME-DOMAIN METHOD; MAXWELLS EQUATIONS
AB We introduce a new, alternative form of the 3-D alternating direction implicit finite-difference time-domain (ADI-FDTD) algorithm that has a number of attractive properties for electromagnetic simulation. We obtain a leapfrog form of the time-advance equations, where the E and H fields are staggered at half-integer and integer time steps, respectively, that preserves the unconditional stability of the ADI-FDTD method. The resulting equations resemble the explicit leapfrog-FDTD method, but the field update equations are modified to include the solution of sets of tri-diagonal equations at each step, similar to the original ADI-FDTD scheme, so that the scheme is not constrained by the Courant-Friedrichs-Lewy limit. The algorithm is simpler than the ADI-FDTD method but algebraically equivalent, allowing a reduction in computation to achieve the same numerical solution. We discuss the advantages of the formulation over the original FDTD and ADI-FDTD methods, and confirm our results numerically. Published in 2008 by John Wiley & Sons, Ltd.
C1 [Cooke, S. J.; Levush, B.] USN, Res Lab, Washington, DC 20375 USA.
[Botton, M.; Antonsen, T. M., Jr.] Univ Maryland, College Pk, MD 20742 USA.
RP Cooke, SJ (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM simon.cooke@nrl.navy.mil
RI Cooke, Simon/A-9530-2010; Antonsen, Thomas/D-8791-2017
OI Antonsen, Thomas/0000-0002-2362-2430
FU U.S. Office of Naval Research
FX This work is supported by the U.S. Office of Naval Research.
NR 10
TC 52
Z9 52
U1 0
U2 14
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0894-3370
J9 INT J NUMER MODEL EL
JI Int. J. Numer. Model.-Electron. Netw. Device Fields
PD MAR-APR
PY 2009
VL 22
IS 2
BP 187
EP 200
DI 10.1002/jnm.707
PG 14
WC Engineering, Electrical & Electronic; Mathematics, Interdisciplinary
Applications
SC Engineering; Mathematics
GA 416HV
UT WOS:000263997500007
ER
PT J
AU Schwer, DA
Kailasanath, K
AF Schwer, Douglas A.
Kailasanath, K.
TI Direct comparison of particle-tracking and sectional approaches for
shock driven flows
SO INTERNATIONAL JOURNAL OF SPRAY AND COMBUSTION DYNAMICS
LA English
DT Article
AB Dispersed-phase flows are important for a wide variety of problems, and several numerical approaches for the solution of dispersed-phase flows have been proposed and implemented in the past. The present research implements two popular approaches to dispersed-phase flows: the Lagrangian particle-tracking approach and the Eulerian sectional approach. A direct comparison between the two methods is made for a range of shock driven seeded flow-fields. First, different drag models are investigated using the particle-tracking method for a range of conditions, and then direct comparisons between the two methods are made for shock speed attenuation and shock-wave profiles. In addition, resolution requirements are investigated to determine the number of sections and the number of particles required to obtain good agreement between the methods, and then two-dimensional simulations are done to investigate the effect of each method on more complicated flow-fields. Results showed both methods can be used to obtain very similar results, although each method has benefits and drawbacks. The glass particles were then replaced with water droplets, and the effect of vaporization and droplet breakup were then investigated. Although vaporization was well represented with the sectional approach, different droplet breakup models had to be implemented for the different approaches, with some significant differences in the resultant droplet distributions. The reason for this is that breakup models require a droplet deformation time before breaking up, and thus a droplet history. This droplet history is difficult to implement in sectional approaches (and Eulerian methods in general), and so the breakup model must be changed. Similar profiles could be reproduced with the sectional method, but significant differences persisted. The results did show, however, that the Eulerian sectional approach is a viable method for computing complex, multi-dimensional flow-fields and can provide significant numerical advantages when compared with Lagrangian particle-tracking methods, especially in flooded environments such as examined here.
C1 [Schwer, Douglas A.; Kailasanath, K.] USN, Res Lab, Ctr React Flow & Dynam Syst, Washington, DC 20375 USA.
RP Schwer, DA (reprint author), USN, Res Lab, Ctr React Flow & Dynam Syst, Code 6410, Washington, DC 20375 USA.
EM schwer@lcp.nrl.navy.mil
NR 26
TC 2
Z9 2
U1 1
U2 4
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1756-8277
EI 1756-8285
J9 INT J SPRAY COMBUST
JI Int. J. Spray Combust. Dyn.
PD MAR
PY 2009
VL 1
IS 1
BP 1
EP 37
DI 10.1260/175682709788083371
PG 37
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA V23NM
UT WOS:000208349500002
ER
PT J
AU Berger, MT
AF Berger, Mark T.
TI From Pax Romana to Pax Americana? The history and future of the new
American Empire
SO INTERNATIONAL POLITICS
LA English
DT Article
DE New American Empire; 'genuinely existing' liberal capitalism;
nation-state system; Pax Romana; Pax Americana; globalization
ID FAILED STATES; WAR
AB This review paper focuses on the most recent cycle in the debate about the history and future of the 'New American Empire,' both in relation to the rise and fall of the Roman Empire specifically, and against the wider backdrop of the extensive debate about the US position in the changing global order more generally. It argues that much of the literature, including some of the books under review, rest on a misreading of history (Roman or otherwise) and a flawed grasp of the fate of the American ascendancy in relation to the contemporary crisis of the nation-state system and the far from unexpected boom-bust cycles of 'genuinely existing' liberal capitalism (globalization) in the twenty-first century. The washout on Wall Street in the latter part of 2008 could only come as a surprise to those who have not been paying attention to the vicissitudes of 'genuinely existing' liberal capitalism over the past 30 years or more. The paper argues that the American ascendancy, contrary to much of the contemporary prognostication, remains in its prime and Pax Americana will only begin a downward spiral when it has been successfully challenged and displace by an equally powerful and systemic alternative. In the meantime, the New American Empire, especially under new leadership, looks set to continue and even flourish. International Politics (2009) 46, 140-156. doi:10.1057/ip.2008.48
C1 USN, Postgrad Sch, Def Anal Dept, Dept Navy, Monterey, CA 93943 USA.
RP Berger, MT (reprint author), USN, Postgrad Sch, Def Anal Dept, Dept Navy, 589 Dyer Rd,Room 210, Monterey, CA 93943 USA.
EM mtberger@nps.edu
NR 59
TC 2
Z9 2
U1 0
U2 5
PU PALGRAVE MACMILLAN LTD
PI BASINGSTOKE
PA BRUNEL RD BLDG, HOUNDMILLS, BASINGSTOKE RG21 6XS, HANTS, ENGLAND
SN 1384-5748
EI 1740-3898
J9 INT POLITICS
JI Int. Polit.
PD MAR
PY 2009
VL 46
IS 2-3
SI SI
BP 140
EP 156
DI 10.1057/ip.2008.48
PG 17
WC International Relations; Political Science
SC International Relations; Government & Law
GA 629YX
UT WOS:000280238600003
ER
PT J
AU Berger, MT
AF Berger, Mark T.
TI Tree of Hate: Propaganda and Prejudices Affecting United States
Relations with the Hispanic World
SO ITINERARIO-INTERNATIONAL JOURNAL ON THE HISTORY OF EUROPEAN EXPANSION
AND GLOBAL INTERACTION
LA English
DT Book Review
C1 [Berger, Mark T.] USN, Postgrad Sch, Monterey, CA USA.
RP Berger, MT (reprint author), USN, Postgrad Sch, Monterey, CA USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA EDINBURGH BLDG, SHAFTESBURY RD, CB2 8RU CAMBRIDGE, ENGLAND
SN 0165-1153
J9 ITINERARIO
JI Itinerario
PD MAR
PY 2009
VL 33
IS 1
BP 141
EP 143
PG 3
WC History
SC History
GA V17JV
UT WOS:000207934400033
ER
PT J
AU Linoski, A
AF Linoski, Alexis
TI Licensing and Managing Electronic Resources
SO JOURNAL OF ACADEMIC LIBRARIANSHIP
LA English
DT Book Review
C1 [Linoski, Alexis] USN Acad, Nimitz Lib, Annapolis, MD 21402 USA.
RP Linoski, A (reprint author), USN Acad, Nimitz Lib, Annapolis, MD 21402 USA.
EM linoski@usna.edu
RI Linoski, Alexis/A-8396-2009
OI Linoski, Alexis/0000-0001-7307-8771
NR 1
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0099-1333
EI 1879-1999
J9 J ACAD LIBR
JI J. Acad. Librariansh.
PD MAR
PY 2009
VL 35
IS 2
BP 192
EP 194
DI 10.1016/j.acalib.2009.01.021
PG 3
WC Information Science & Library Science
SC Information Science & Library Science
GA 433BT
UT WOS:000265179300020
ER
PT J
AU Phillips, WF
Niewoehner, RJ
AF Phillips, W. F.
Niewoehner, R. J.
TI Characteristic Length and Dynamic Time Scale Associated with Aircraft
Pitching Motion
SO JOURNAL OF AIRCRAFT
LA English
DT Article; Proceedings Paper
CT AIAA 47th Aerospace Sciences Meeting and Exhibit
CY JAN 05-08, 2009
CL Orlando, FL
SP Amer Inst Aeronaut & Astronaut
AB The 5%-static-margin requirement once used by the military has been removed in favor of dynamic requirements. However, static margin is still commonly used as a preliminary guideline for establishing adequate pitch stability in piloted airplanes. Here, a dynamic margin is defined to be the distance that the airplane's stick-fixed maneuver point lies aft of the center of gravity, expressed as a fraction of the pitch radius of gyration. A proposed minimum-dynamic-margin constraint is shown to agree with the short-period-frequency requirements used in recent military specifications to an accuracy of about 2%. For some airplanes, this stability constraint is shown to differ from the 5%-minimum-static-margin guideline by more than 400%. Two worked examples are presented, which demonstrate the significance of the proposed dynamic-margin constraint.
C1 [Phillips, W. F.] Utah State Univ, Dept Mech & Aerosp Engn, Logan, UT 84322 USA.
[Niewoehner, R. J.] USN Acad, Dept Aerosp Engn, Annapolis, MD 21402 USA.
RP Phillips, WF (reprint author), Utah State Univ, Dept Mech & Aerosp Engn, 4130 Old Main Hill, Logan, UT 84322 USA.
NR 37
TC 1
Z9 1
U1 0
U2 1
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 MAR-APR
PY 2009
VL 46
IS 2
BP 572
EP 582
DI 10.2514/1.38724
PG 11
WC Engineering, Aerospace
SC Engineering
GA 428OR
UT WOS:000264858800022
ER
PT J
AU Kaya, M
Tuncer, IH
Jones, KD
Platzer, MF
AF Kaya, Mustafa
Tuncer, Ismail H.
Jones, Kevin D.
Platzer, Max F.
TI Optimization of Flapping Motion Parameters for Two Airfoils in a Biplane
Configuration
SO JOURNAL OF AIRCRAFT
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 MICRO AIR VEHICLES; PROPULSIVE EFFICIENCY; THRUST GENERATION; PLUNGING
AIRFOIL; FOIL PROPULSION; PERFORMANCE; DESIGN
AB Flapping motion parameters of airfoils in a biplane configuration are optimized for maximum thrust and/or propulsive efficiency. Unsteady, viscous flowfields over airfoils flapping in a combined plunge and pitch are computed with a parallel flow solver on moving and deforming overset grids. The amplitudes of the sinusoidal pitch and plunge motions and the phase shift between them are optimized for a range of flapping frequencies. A gradient-based optimization algorithm is implemented in a parallel computing environment. The deforming overset grids employed remove the restriction on the flapping motion of airfoils, and improve the optimization results obtained earlier. In the Strouhal number range 0.17 < Sr < 0.25, an airfoil in a biplane configuration produces more thrust than a single airfoil. Yet, at a higher Strouhal number, the airfoil in a biplane configuration produced less thrust at a significantly lower efficiency than a single flapping airfoil.
C1 [Kaya, Mustafa; Tuncer, Ismail H.] Middle E Tech Univ, Dept Aerosp Engn, TR-06531 Ankara, Turkey.
[Jones, Kevin D.; Platzer, Max F.] USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
RP Kaya, M (reprint author), Middle E Tech Univ, Dept Aerosp Engn, TR-06531 Ankara, Turkey.
OI Kaya, Mustafa/0000-0002-2542-0795
NR 26
TC 8
Z9 9
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 MAR-APR
PY 2009
VL 46
IS 2
BP 583
EP 592
DI 10.2514/1.38796
PG 10
WC Engineering, Aerospace
SC Engineering
GA 428OR
UT WOS:000264858800023
ER
PT J
AU Neumann, JG
Fiorito, RB
O'Shea, PG
Loos, H
Sheehy, B
Shen, Y
Wu, Z
AF Neumann, J. G.
Fiorito, R. B.
O'Shea, P. G.
Loos, H.
Sheehy, B.
Shen, Y.
Wu, Z.
TI Terahertz laser modulation of electron beams
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE electron beams; free electron lasers; high-speed optical techniques;
optical modulation; particle beam bunching; photocathodes
ID PHASE-SPACE TOMOGRAPHY; TRANSITION RADIATION; TRANSMISSION; EMISSION;
BUNCHES
AB The study of modulated electron beams is important because they can be used to produce coherent radiation, but the modulations can cause unwanted instabilities in some devices. Specifically, in a free electron laser, proper prebunching at the desired emission frequency can enhance performance, while bunching resulting from instabilities and bunch compression schemes can degrade performance. In a photoinjector accelerator, tailoring the shape of the drive laser pulse could be used as a technique to either enhance or mitigate the effect of these modulations. This work explores the possibility of creating deeply modulated electron beams at the photocathode by using a modified drive laser designed to produce multiple subpicosecond pulses repeated at terahertz frequencies. Longitudinal space charge forces can strongly influence the evolution of modulations by converting density modulations to energy modulations. Experiments at the Source Development Laboratory electron accelerator at Brookhaven National Laboratory and PARMELA simulations are employed to explore the dynamics of electron beams with varying charge and with varying initial modulation. Finally, terahertz light generated by a transition radiator is used to confirm the structure of the electron beam.
C1 [Neumann, J. G.; Fiorito, R. B.; O'Shea, P. G.] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA.
[Loos, H.; Sheehy, B.; Shen, Y.; Wu, Z.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
[O'Shea, P. G.] Univ Maryland, Dept Elect & Comp Engn, College Pk, MD 20742 USA.
RP Neumann, JG (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM jonathan.neumann@nrl.navy.mil
OI Loos, Henrik/0000-0001-5085-0562
FU U. S. Department of Energy, Division of Materials Sciences; Division of
Chemical Sciences [DE-AC02-98CH10886]; Joint Technology Office; Office
of Naval Research; Army Research Laboratory
FX This work was carried out with the support from the U. S. Department of
Energy, Division of Materials Sciences and Division of Chemical
Sciences, under Contract No. DE-AC02-98CH10886, with the support from
the Joint Technology Office, Office of Naval Research, and Army Research
Laboratory, and with the support from Professor Chris Davis at the
University of Maryland.
NR 40
TC 29
Z9 29
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 1
PY 2009
VL 105
IS 5
AR 053304
DI 10.1063/1.3075563
PG 11
WC Physics, Applied
SC Physics
GA 418NZ
UT WOS:000264156300015
ER
PT J
AU Russell, JM
Bailey, SM
Gordley, LL
Rusch, DW
Horanyi, M
Hervig, ME
Thomas, GE
Randall, CE
Siskind, DE
Stevens, MH
Summers, ME
Taylor, MJ
Englert, CR
Espy, PJ
McClintock, WE
Merkel, AW
AF Russell, James M., III
Bailey, Scott M.
Gordley, Larry L.
Rusch, David W.
Horanyi, Mihaly
Hervig, Mark E.
Thomas, Gary E.
Randall, Cora E.
Siskind, David E.
Stevens, Michael H.
Summers, Michael E.
Taylor, Michael J.
Englert, Christoph R.
Espy, Patrick J.
McClintock, William E.
Merkel, Aimee W.
TI The Aeronomy of Ice in the Mesosphere (AIM) mission: Overview and early
science results
SO JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
LA English
DT Article; Proceedings Paper
CT 8th International Workshop on Layered Phenomena in the Mesopause Region
(LPMR-8)
CY AUG 20-23, 2007
CL Univ Alaska Fairbanks, Fairbanks, AK
SP Int Working Grp Layered Phenomena Mesopause Reg, Int Commiss Middle Atmosphere, Int Union Geodesy & Geophys, NASA, Natl Sci Fdn
HO Univ Alaska Fairbanks
DE Polar mesospheric clouds; Mesosphere; Remote sensing; Gases; Particles;
Global change
ID ARCTIC SUMMER MESOSPHERE; GRAVITY-WAVE INFLUENCES; NOCTILUCENT CLOUDS;
COSMIC DUST; POLAR MESOSPHERE; WATER-VAPOR; PARTICLES; PMSE; INSTRUMENT;
SPACECRAFT
AB The Aeronomy of Ice in the Mesosphere (AIM) mission was launched from Vandenberg Air Force Base in California at 1:26:03 PDT on April 25, 2007 becoming the first satellite mission dedicated to the study of polar mesospheric clouds. A Pegasus XL rocket launched the satellite into a near perfectly circular 600 km sun synchronous orbit. AIM carries three instruments selected because of their ability to provide key measurements needed to address the AIM goal which is to determine why these clouds form and vary. The instrument payload includes a nadir imager, a solar occultation instrument and an in-situ cosmic dust detector. Detailed descriptions of the science, instruments and observation scenario are presented. Early science results from the first northern and southern hemisphere seasons show a highly variable cloud morphology, clouds that are ten times brighter than measured by previous space-based instruments, and complex features that are reminiscent of tropospheric weather phenomena. The observations also confirm a previously theorized but never before directly observed population of small ice particles in the altitude region above the main Polar Mesospheric Cloud (PMC) layer that are widely believed to be the indirect cause of summertime radar echoes. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Russell, James M., III] Hampton Univ, Ctr Atmospher Sci, Hampton, VA 23668 USA.
[Bailey, Scott M.] Virginia Polytech Inst & State Univ, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061 USA.
[Gordley, Larry L.; Hervig, Mark E.] GATS Inc, Newport News, VA 23606 USA.
[Rusch, David W.; Horanyi, Mihaly; Thomas, Gary E.; Randall, Cora E.; McClintock, William E.; Merkel, Aimee W.] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80303 USA.
[Siskind, David E.; Stevens, Michael H.; Englert, Christoph R.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Summers, Michael E.] George Mason Univ, Dept Phys, Fairfax, VA 22030 USA.
[Taylor, Michael J.] Utah State Univ, Ctr Atmospher & Space Sci, Logan, UT 84322 USA.
[Taylor, Michael J.] Utah State Univ, Dept Phys, Logan, UT 84322 USA.
[Espy, Patrick J.] Norwegian Univ Sci & Technol, Dept Phys, NO-7491 Trondheim, Norway.
RP Russell, JM (reprint author), Hampton Univ, Ctr Atmospher Sci, 23 Tyler St, Hampton, VA 23668 USA.
EM james.russell@hamptonu.edu
RI Randall, Cora/L-8760-2014;
OI Randall, Cora/0000-0002-4313-4397; Englert,
Christoph/0000-0002-2145-6168; Stevens, Michael/0000-0003-1082-8955;
Horanyi, Mihaly/0000-0002-5920-9226
NR 46
TC 89
Z9 90
U1 0
U2 12
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1364-6826
EI 1879-1824
J9 J ATMOS SOL-TERR PHY
JI J. Atmos. Sol.-Terr. Phys.
PD MAR
PY 2009
VL 71
IS 3-4
SI SI
BP 289
EP 299
DI 10.1016/j.jastp.2008.08.011
PG 11
WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
GA 433UQ
UT WOS:000265231700002
ER
PT J
AU Hervig, ME
Gordley, LL
Stevens, MH
Russell, JM
Bailey, SM
Baumgarten, G
AF Hervig, Mark E.
Gordley, Larry L.
Stevens, Michael H.
Russell, James M., III
Bailey, Scott M.
Baumgarten, Gerd
TI Interpretation of SOFIE PMC measurements: Cloud identification and
derivation of mass density, particle shape, and particle size
SO JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
LA English
DT Article; Proceedings Paper
CT 8th International Workshop on Layered Phenomena in the Mesopause Region
(LPMR-8)
CY AUG 20-23, 2007
CL Univ Alaska Fairbanks, Fairbanks, AK
SP Int Working Grp Layered Phenomena Mesopause Reg, Int Commiss Middle Atmosphere, Int Union Geodesy & Geophys, NASA, Natl Sci Fdn
HO Univ Alaska Fairbanks
DE AIM; SOFIE; Mesosphere; PMC
ID POLAR MESOSPHERIC CLOUDS; DEPENDENT OPTICAL-CONSTANTS; SUMMER
MESOSPHERE; WATER ICE; LIDAR; DISTRIBUTIONS; ALOMAR; RANGE; NLC
AB The Solar Occultation For Ice Experiment (SOFIE) was launched onboard the Aeronomy of Ice in the Mesosphere (AIM) spacecraft to measure polar mesospheric clouds (PMCs) and their environment. This work describes methods for identifying PMCs in SORE observations and determining mass density, particle shape, particle effective radius, and the parameters of a Gaussian size distribution. Results using SOFIE measurements from the northern summer of 2007 are compared with concurrent observations by the ALOMAR lidar in northern Norway. Ice particle properties determined from SORE are in good agreement with the lidar results, considering the differences in instrument characteristics. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Hervig, Mark E.] GATS Inc, Driggs, ID 83422 USA.
[Gordley, Larry L.] GATS Inc, Newport News, VA 23606 USA.
[Stevens, Michael H.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Russell, James M., III] Hampton Univ, Hampton, VA 23668 USA.
[Bailey, Scott M.] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
[Baumgarten, Gerd] Leibniz Inst Atmospher Phys, Kuhlungsborn, Germany.
RP Hervig, ME (reprint author), GATS Inc, Driggs, ID 83422 USA.
EM m.e.hervig@gats-inc.com
OI Stevens, Michael/0000-0003-1082-8955; Baumgarten,
Gerd/0000-0002-6727-284X
NR 29
TC 56
Z9 56
U1 0
U2 9
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1364-6826
J9 J ATMOS SOL-TERR PHY
JI J. Atmos. Sol.-Terr. Phys.
PD MAR
PY 2009
VL 71
IS 3-4
SI SI
BP 316
EP 330
DI 10.1016/j.jastp.2008.07.009
PG 15
WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
GA 433UQ
UT WOS:000265231700004
ER
PT J
AU Stevens, MH
Englert, CR
Hervig, M
Petelina, SV
Singer, W
Nielsen, K
AF Stevens, Michael H.
Englert, Christop R.
Hervig, Mark
Petelina, Svetlana V.
Singer, Werner
Nielsen, Kim
TI The diurnal variation of polar mesospheric cloud frequency near 55
degrees N observed by SHIMMER
SO JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
LA English
DT Article; Proceedings Paper
CT 8th International Workshop on Layered Phenomena in the Mesopause Region
(LPMR-8)
CY AUG 20-23, 2007
CL Univ Alaska Fairbanks, Fairbanks, AK
SP Int Working Grp Layered Phenomena Mesopause Reg, Int Commiss Middle Atmosphere, Int Union Geodesy & Geophys, NASA, Natl Sci Fdn
HO Univ Alaska Fairbanks
DE Noctilucent clouds; Polar mesospheric clouds; Tides; Mesosphere; Arctic
ID SPATIAL HETERODYNE SPECTROSCOPY; NOCTILUCENT CLOUDS;
NORTHERN-HEMISPHERE; SUMMER MESOPAUSE; ARCTIC LATITUDES; METEOR RADAR;
ODIN/OSIRIS; LIDAR; TEMPERATURE; VARIABILITY
AB We present the first measurement of polar mesospheric cloud (PMC) occurrence frequency over the diurnal cycle from a satellite. The observations are made during the 2007 northern hemisphere PMC season by the Spatial Heterodyne Wager for MEsospheric Radicals (SHIMMER), which views the limb near 309 nm typically between 34 and 98 km. The PMC diurnal variation is derived between 50 and 58 degrees N, where local times at the tangent point precess by similar to 30 min/day allowing for observations between 0330 and 2130 local time during the PMC season. We find that the occurrence frequencies exhibit a strong semidiurnal behavior with peaks near 0600 and 1800 local time and a minimum between 0900 and 1600 during which they are on average an order of magnitude less. The semidiurnal dependence is strongly correlated with concurrent ground-based measurements of meridional winds and temperatures measured at the same latitude. Our results for PMC frequency over the diurnal cycle can be used to help reconcile observations from other satellites that only permit cloud measurements at discrete local times. Published by Elsevier Ltd.
C1 [Stevens, Michael H.; Englert, Christop R.] USN, Div Space Sci, Res Lab, Washington, DC USA.
[Hervig, Mark] GATS Inc, Driggs, ID USA.
[Petelina, Svetlana V.] La Trobe Univ, Dept Phys, Bundoora, Vic 3086, Australia.
[Singer, Werner] Leibniz Inst Atmospher Phys eV, Kuhlungsborn, Germany.
[Nielsen, Kim] Computat Phys Inc, Springfield, VA USA.
RP Stevens, MH (reprint author), USN, Div Space Sci, Res Lab, Washington, DC USA.
EM michael.stevens@nrl.navy.mil
OI Stevens, Michael/0000-0003-1082-8955
NR 42
TC 18
Z9 19
U1 0
U2 1
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1364-6826
J9 J ATMOS SOL-TERR PHY
JI J. Atmos. Sol.-Terr. Phys.
PD MAR
PY 2009
VL 71
IS 3-4
SI SI
BP 401
EP 407
DI 10.1016/j.jastp.2008.10.009
PG 7
WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
GA 433UQ
UT WOS:000265231700012
ER
PT J
AU Eckermann, SD
Hoppel, KW
Coy, L
McCormack, JP
Siskind, DE
Nielsen, K
Kochenash, A
Stevens, MH
Englert, CR
Singer, W
Hervig, M
AF Eckermann, Stephen D.
Hoppel, Karl W.
Coy, Lawrence
McCormack, John P.
Siskind, David E.
Nielsen, Kim
Kochenash, Andrew
Stevens, Michael H.
Englert, Christoph R.
Singer, Werner
Hervig, Mark
TI High-altitude data assimilation system experiments for the northern
summer mesosphere season of 2007
SO JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
LA English
DT Article; Proceedings Paper
CT 8th International Workshop on Layered Phenomena in the Mesopause Region
(LPMR-8)
CY AUG 20-23, 2007
CL Univ Alaska Fairbanks, Fairbanks, AK
SP Int Working Grp Layered Phenomena Mesopause Reg, Int Commiss Middle Atmosphere, Int Union Geodesy & Geophys, NASA, Natl Sci Fdn
HO Univ Alaska Fairbanks
DE Data assimilation; Polar mesospheric cloud; Tide; Planetary wave;
Mesosphere
ID GRAVITY-WAVE DRAG; NORMAL-MODE INITIALIZATION; MIDDLE ATMOSPHERE;
GENERAL-CIRCULATION; NOCTILUCENT CLOUDS; LOWER THERMOSPHERE; THERMAL
STRUCTURE; PLANETARY-WAVES; STRATOSPHERIC OZONE; PREDICTION SYSTEM
AB A global numerical weather prediction system is extended to the mesosphere and lower thermosphere (MILT) and used to assimilate high-altitude satellite measurements of temperature, water vapor and ozone from MLS and SABER during May-July 2007. Assimilated temperature and humidity from 100 to 0.001 hPa show minimal biases compared to satellite data and existing analysis fields. Saturation ratios derived diagnostically from these assimilated temperature and water vapor fields at PMC altitudes and latitudes compare well with seasonal variations in PMC frequency measured from the aeronomy of ice in the mesosphere (AIM) satellite. Synoptic maps of these diagnostic saturation ratios correlate geographically with three independent transient mesospheric cloud events observed at midlatitudes by SHIMMER on STPSat-1 and by ground observers during June 2007. Assimilated temperatures and winds reveal broadly realistic amplitudes of the quasi 5-day wave and migrating tides as a function of latitude and height. For example, analyzed winds capture the dominant semidiurnal MLT wind patterns at 55 degrees N in June 2007 measured independently by a meteor radar. The 5-day wave and migrating diurnal tide also modulate water vapor mixing ratios in the polar summer MLT. Possible origins of this variability are discussed. Published by Elsevier Ltd.
C1 [Eckermann, Stephen D.; Coy, Lawrence; McCormack, John P.; Siskind, David E.; Stevens, Michael H.; Englert, Christoph R.] USN, Div Space Sci, Res Lab, Washington, DC USA.
[Hoppel, Karl W.] USN, Remote Sensing Div, Res Lab, Washington, DC USA.
[Nielsen, Kim; Kochenash, Andrew] Computat Phys Inc, Springfield, VA USA.
[Singer, Werner] Leibniz Inst Atmospher Phys, Kuhlungsborn, Germany.
[Hervig, Mark] GATS Inc, Driggs, ID USA.
RP Eckermann, SD (reprint author), USN, Div Space Sci, Res Lab, Washington, DC USA.
EM stephen.eckermann@nrl.navy.mil
OI McCormack, John/0000-0002-3674-0508; Englert,
Christoph/0000-0002-2145-6168; Stevens, Michael/0000-0003-1082-8955
NR 116
TC 68
Z9 69
U1 0
U2 16
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1364-6826
J9 J ATMOS SOL-TERR PHY
JI J. Atmos. Sol.-Terr. Phys.
PD MAR
PY 2009
VL 71
IS 3-4
SI SI
BP 531
EP 551
DI 10.1016/j.jastp.2008.09.036
PG 21
WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
GA 433UQ
UT WOS:000265231700025
ER
PT J
AU Wiltbank, R
Read, S
Dew, N
Sarasvathy, SD
AF Wiltbank, Robert
Read, Stuart
Dew, Nicholas
Sarasvathy, Saras D.
TI Prediction and control under uncertainty: Outcomes in angel investing
SO JOURNAL OF BUSINESS VENTURING
LA English
DT Article
DE Angel investing; Decision-making; Prediction; Control; Effectuation;
Uncertainty
ID VENTURE CAPITAL INVESTMENTS; REAL OPTIONS; STRATEGIC MANAGEMENT;
PERFORMANCE; RISK; DECISION; MARKET; INDUSTRY; FAILURE; RETURN
AB Venture investing plays an important role in entrepreneurship not only because financial resources are important to new ventures, but also because early investors help shape the ventures' managerial and strategic destiny. In this study of 121 angel investors who had made 1038 new venture investments, we empirically investigate angel investors' differential use of predictive versus non-predictive control strategies. We show how the use of these strategies affects the outcomes of angel investors. Results show that angels who emphasize prediction make significantly larger venture investments, while those who emphasize non-predictive control experience a reduction in investment failures without a reduction in their number of successes. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Wiltbank, Robert] Willamette Univ, Atkinson Grad Sch Management, Salem, OR 97301 USA.
[Read, Stuart] IMD, CH-1001 Lausanne, Switzerland.
[Dew, Nicholas] USN, Postgrad Sch, Monterey, CA 93943 USA.
[Sarasvathy, Saras D.] Univ Virginia, Darden Grad Sch Business Adm, Charlottesville, VA 22903 USA.
RP Wiltbank, R (reprint author), Willamette Univ, Atkinson Grad Sch Management, Salem, OR 97301 USA.
EM Wiltbank@Willamette.edu; Stuart.Read@imd.ch; NDew@nps.edu;
SarasvathyS@darden.virginia.edu
NR 56
TC 58
Z9 57
U1 8
U2 85
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0883-9026
J9 J BUS VENTURING
JI J. Bus. Ventur.
PD MAR
PY 2009
VL 24
IS 2
BP 116
EP 133
DI 10.1016/j.jbusvent.2007.11.004
PG 18
WC Business
SC Business & Economics
GA 421IW
UT WOS:000264353600002
ER
PT J
AU Karle, IL
Rajesh, YBRD
Ranganathan, S
AF Karle, Isabella L.
Rajesh, Y. B. R. D.
Ranganathan, Subramania
TI Crystal Engineering: A Unique Cyclic Assembly of a 40 Membered Module
Composed from Two Alternating Units Each of Benzenehexacarboxylic Acid
(Mellitic Acid, MA) and 2,5-Bis-(4-pyridyl)-1,3,4-oxadiazole (4-BPO):
Assembly of Modules to Macromolecules by Intermolecular Hydrogen Bonding
SO JOURNAL OF CHEMICAL CRYSTALLOGRAPHY
LA English
DT Article
DE Macrocyclic module (40); Non-covalent self-assembly; Modules to
supramolecules
ID ANIONS
AB Individually prepared, equivalent amounts of 2,5-bis-(4-pyridyl)-1,3,4-oxadiazole (4-BPO) and benzene-hexacarboxylic acid ( mellitic acid, MA) when mixed, deposited long rods, whose X-ray structure showed a unique assembly of 40 membered planar modules composed from two alternating units each of MA and 4-BPO, rather than the anticipated helical profile. Several novel features of complexes of MA with organic molecules are seen here. In almost all cases the intermolecular hydrogen bonding between MA anions is so stable that the MA anions and the complementary cations lie in separate planes. This barrier is overcome in the present case. The basic module associates to form quartets by very simple hydrogen bonding of the carboxylic groups of MA. The quartet assembly is characterized by the rotation of the left hand pair compared to the right hand pair. The mode of the macromolecular assembly is clear, that is, they are layered in alternating planes. Space group: P2(1)/c with a = 9.181(1) angstrom, b = 9.624(1) angstrom, c = 29.390(2) angstrom, and beta = 94.626(4)degrees. The modules are embedded in an extensively hydrogen bonded MA network. The assembly profile of MA and 4-BPO is unique and should be a harbinger for the design of novel functional assemblies. The 40-membered module mimics the self-assemblies of peptides and can be important in the design of "Haptens" from simple molecules.
C1 [Karle, Isabella L.] USN, Res Lab, Struct Matter Lab, Washington, DC 20375 USA.
[Rajesh, Y. B. R. D.; Ranganathan, Subramania] Indian Inst Chem Technol, Discovery Lab, Hyderabad 500607, Andhra Pradesh, India.
RP Karle, IL (reprint author), USN, Res Lab, Struct Matter Lab, Code 6030,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM isabella.karle@navy.nrl.mil
RI G, Neela/H-3016-2014
NR 6
TC 2
Z9 3
U1 0
U2 2
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1074-1542
J9 J CHEM CRYSTALLOGR
JI J. Chem. Crystallogr.
PD MAR
PY 2009
VL 39
IS 3
BP 201
EP 208
DI 10.1007/s10870-008-9458-z
PG 8
WC Crystallography; Spectroscopy
SC Crystallography; Spectroscopy
GA 397OV
UT WOS:000262672900009
ER
PT J
AU Choi, SR
Alexander, DJ
Kowalik, RW
AF Choi, Sung R.
Alexander, Donald J.
Kowalik, Robert W.
TI Foreign Object Damage in an Oxide/Oxide Composite at Ambient Temperature
SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE
ASME
LA English
DT Article; Proceedings Paper
CT 53rd ASME Turbo Expo 2008
CY JUN 09-13, 2008
CL Berlin, GERMANY
SP Int Gas Turbine Inst, ASME
DE bending; ceramics; composite materials; failure (mechanical); impact
(mechanical)
ID GRADE SILICON NITRIDES; IMPACT DAMAGE; STRENGTH DEGRADATION; SURFACES;
SPHERES; MODEL
AB Foreign object damage behavior of an oxide/oxide (N720/AS) ceramic matrix composite was determined at ambient temperature using impact velocities ranging from 100 m/s to 400 m/s by 1.59 mm diameter steel-ball projectiles. Two different support configurations of target specimens were used: fully supported and partially supported. The degree of post-impact strength degradation increased with increasing impact velocity and was greater in a partially supported configuration than in a fully supported one. For the fully supported configuration, frontal contact stress played a major role in generating composite damage, while for the partially supported case, both frontal contact and backside flexure stresses were the combined sources of damage generation. The oxide/oxide composite was able to survive high energy (similar to 1.3 J) impacts without complete structural failure. The degree of relative post-impact strength degradation of the oxide/oxide composite was similar to that of an advanced SiC/SiC composite observed from a previous study, regardless of the type of specimen support. Like the SiC/SiC composite, impact-damage tolerance was greater in the oxide/oxide than in monolithic silicon nitride ceramics for impact velocities >300 m/s.
C1 [Choi, Sung R.; Alexander, Donald J.; Kowalik, Robert W.] USN, Air Syst Command, Patuxent River, MD 20670 USA.
RP Choi, SR (reprint author), USN, Air Syst Command, Patuxent River, MD 20670 USA.
EM sung.choi1@navy.mil
NR 27
TC 15
Z9 15
U1 0
U2 3
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0742-4795
J9 J ENG GAS TURB POWER
JI J. Eng. Gas. Turbines Power-Trans. ASME
PD MAR
PY 2009
VL 131
IS 2
AR 021301
DI 10.1115/1.2969091
PG 6
WC Engineering, Mechanical
SC Engineering
GA 393KN
UT WOS:000262372300001
ER
PT J
AU Breslow, LA
Trafton, JG
Ratwani, RM
AF Breslow, Leonard A.
Trafton, J. Gregory
Ratwani, Raj M.
TI A Perceptual Process Approach to Selecting Color Scales for Complex
Visualizations
SO JOURNAL OF EXPERIMENTAL PSYCHOLOGY-APPLIED
LA English
DT Article
DE data visualization; graph comprehension; eye tracking; visual search
ID VISUAL-SEARCH; INTERACTIVE BEHAVIOR; SOFT CONSTRAINTS; INFORMATION;
BRIGHTNESS; DISPLAYS; PRINCIPLES; CAPACITY; MODEL; MAPS
AB Previous research has shown that multicolored scales are superior to ordered brightness scales for supporting identification tasks on complex visualizations (categorization, absolute numeric value judgments, etc.), whereas ordered brightness scales are superior for relative comparison tasks (greater/less). We examined the processes by which such tasks are performed. By studying eye movements and by comparing performance on scales of different sizes, we argued that (a) people perform identification tasks by conducting a serial visual search of the legend, whose speed is sensitive to the number of scale colors and the discriminability of the colors; and (b) people perform relative comparison tasks using different processes for multicolored versus brightness scales. With multicolored scales, they perform a parallel search of the legend, whose speed is relatively insensitive to the size of the scale, whereas with brightness scales, people usually directly compare the target colors in the visualization, while making little reference to the legend. Performance of comparisons was relatively robust against increases in scale size, whereas performance of identifications deteriorated markedly, especially with brightness scales, once scale sizes reached 10 colors or more.
C1 [Breslow, Leonard A.; Trafton, J. Gregory; Ratwani, Raj M.] NRL, Washington, DC 20375 USA.
[Ratwani, Raj M.] George Mason Univ, Dept Psychol, Fairfax, VA 22030 USA.
RP Breslow, LA (reprint author), NRL, Code 5515, Washington, DC 20375 USA.
EM len.breslow@nrl.navy.mil
RI Ratwani, Raj/B-1375-2009
NR 32
TC 9
Z9 9
U1 2
U2 6
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 1076-898X
J9 J EXP PSYCHOL-APPL
JI J. Exp. Psychol.-Appl.
PD MAR
PY 2009
VL 15
IS 1
BP 25
EP 34
DI 10.1037/a0015085
PG 10
WC Psychology, Applied
SC Psychology
GA 421KA
UT WOS:000264356600004
PM 19309214
ER
PT J
AU Bandyopadhyay, PR
AF Bandyopadhyay, Promode R.
TI Swimming and Flying in Nature-The Route Toward Applications: The Freeman
Scholar Lecture
SO JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
LA English
DT Review
DE biorobotics; fluids engineering; fluid dynamics
ID MACKEREL SCOMBER-JAPONICUS; HOVERING INSECT FLIGHT; LOW
REYNOLDS-NUMBERS; UNSTEADY AERODYNAMIC PERFORMANCE; PARTICLE IMAGE
VELOCIMETRY; HIGH PROPULSIVE EFFICIENCY; AQUATIC ANIMAL PROPULSION;
WEIS-FOGH MECHANISM; LEADING-EDGE VORTEX; MICRO-AIR VEHICLES
AB Evolution is a slow but sure Process of perfecting design to give a life-form a natural advantage in a competitive environment. The resulting complexity and performance are so sophisticated that, by and large, they are yet to be matched by man-made devices. They offer a vast array of design inspirations. The lessons front swimming and flying animals that are useful to fluids engineering devices arc considered. The science and engineering of this subject-termed "biorobotics" here-are reviewed. The subject, being of dynamic objects, spans fluid dynamics, materials, and control, as well as their integration. The emphasis is on understanding the underlying science and design principles and applying them to transition to human usefulness rather than to conduct any biomimicry. First, the gaps between nature and man-made devices in terms of fluids engineering characteristics are quantitatively defined. To bridge these gaps, we then identify the underlying science principles in the production of unsteady high-lift that nature is boldly using, but that engineers have preferred to refrain from or have not conceived of. This review is primarily concerned with the leading-edge vortex phenomenon that is mainly responsible for unsteady high-lift. Next, design laws are determined. Several applications are discussed and the status of the closure of the gaps between nature and engineering is reviewed. Finally, recommendations for future research in unsteady fluids engineering arc given. [DOI: 10.1115/1.3063687]
C1 [Bandyopadhyay, Promode R.] USN, Dept Autonomous & Defens Syst, Undersea Warfare Ctr, Newport, RI 02841 USA.
RP Bandyopadhyay, PR (reprint author), USN, Dept Autonomous & Defens Syst, Undersea Warfare Ctr, Newport, RI 02841 USA.
EM promode.bandyopadhya@navy.mil
NR 200
TC 7
Z9 7
U1 2
U2 12
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0098-2202
J9 J FLUID ENG-T ASME
JI J. Fluids Eng.-Trans. ASME
PD MAR
PY 2009
VL 131
IS 3
AR 031801
DI 10.1115/1.3063687
PG 29
WC Engineering, Mechanical
SC Engineering
GA 442KQ
UT WOS:000265840500010
ER
PT J
AU Yoon, HJ
Agrawal, BN
AF Yoon, Hyungjoo
Agrawal, Brij N.
TI Novel Expressions of Equations of Relative Motion and Control in
Keplerian Orbits
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
ID SPACECRAFT
C1 [Yoon, Hyungjoo; Agrawal, Brij N.] USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
RP Yoon, HJ (reprint author), USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
EM drake.yoon@gmail.com; agrawal@nps.edu
NR 20
TC 11
Z9 14
U1 0
U2 5
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 MAR-APR
PY 2009
VL 32
IS 2
BP 664
EP 669
DI 10.2514/1.38210
PG 6
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 422FP
UT WOS:000264413200033
ER
PT J
AU Vaddi, SS
Menon, PK
Ohlmeyer, EJ
AF Vaddi, S. S.
Menon, P. K.
Ohlmeyer, E. J.
TI Numerical State-Dependent Riccati Equation Approach for Missile
Integrated Guidance Control
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article; Proceedings Paper
CT AIAA Guidance, Navigation, and Control Conference
CY AUG 20-23, 2007
CL Hilton Head Isl, SC
C1 [Vaddi, S. S.; Menon, P. K.] Optimal Synth Inc, Los Altos, CA 94022 USA.
[Ohlmeyer, E. J.] USN, Ctr Surface Warfare, Dahlgren, VA 22448 USA.
RP Vaddi, SS (reprint author), Optimal Synth Inc, 95 1st St, Los Altos, CA 94022 USA.
NR 11
TC 34
Z9 39
U1 0
U2 10
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 MAR-APR
PY 2009
VL 32
IS 2
BP 699
EP 703
DI 10.2514/1.34291
PG 5
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 422FP
UT WOS:000264413200039
ER
PT J
AU Woodrum, DA
Herrmann, J
Lerman, A
Romano, AJ
Lerman, LO
Ehman, RL
AF Woodrum, David A.
Herrmann, Joerg
Lerman, Amir
Romano, Anthony J.
Lerman, Lilach O.
Ehman, Richard L.
TI Phase-Contrast MRI-Based Elastography Technique Detects Early
Hypertensive Changes in Ex Vivo Porcine Aortic Wall
SO JOURNAL OF MAGNETIC RESONANCE IMAGING
LA English
DT Article
DE MRI; elastography; aorta
ID MAGNETIC-RESONANCE ELASTOGRAPHY; ACOUSTIC STRAIN WAVES; RENAL-ARTERY
STENOSIS; STIFFNESS; HYPERCHOLESTEROLEMIA; ELASTICITY; MOTION
AB Purpose: To measure the elastic properties of ex vivo porcine aortas in control and hypertensive groups using a phase contrast magnetic resonance imaging (MRI)-based elastography technique.
Materials and Methods: Female domestic pigs were randomized to a normal control group (N; n = 5) or a renovascular hypertension group (HT; n = 5) for the duration of 3 months. Mean arterial pressure was significantly higher in the hypertension group than in the control group (173 +/- 12 vs. 115 +/- 11 mmHg, P <= 0.05). The animals were euthanized after 3 months of hypertension and abdominal aortas harvested. The ex vivo aortic samples were then examined using a phase-contrast MRI-based elastography technique.
Results: The Young's modulus-wall thickness product, a reflection of vascular stiffness, was significantly higher in the hypertension group than in the control group (0.571 +/- 0.080 vs. 0.419 +/- 0.026, P < 0.05). Histological analysis and staining confirmed Increased intima-media thickness and collagen content in the hypertensive aorta, while elastin staining showed no difference.
Conclusion: The current study shows that MR elastograpby offers a method to study the physiologic changes in the arterial wall secondary to early hypertension.
C1 [Woodrum, David A.; Ehman, Richard L.] Mayo Clin, Dept Radiol, Rochester, MN USA.
[Herrmann, Joerg; Lerman, Amir] Mayo Clin, Dept Cardiol, Rochester, MN USA.
[Romano, Anthony J.] USN, Res Lab, Washington, DC 20375 USA.
[Lerman, Lilach O.] Mayo Clin, Dept Hypertens & Nephrol, Rochester, MN USA.
RP Woodrum, DA (reprint author), 200 1st St SW, Rochester, MN 55905 USA.
EM Woodrum.david@mayo.edu
FU [EB001981]; [DK73608]
FX Contract grant sponsor: Contract grant numbers: EB001981 and DK73608.
NR 21
TC 16
Z9 16
U1 0
U2 3
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 1053-1807
J9 J MAGN RESON IMAGING
JI J. Magn. Reson. Imaging
PD MAR
PY 2009
VL 29
IS 3
BP 583
EP 587
DI 10.1002/jmri.21702
PG 5
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 415GT
UT WOS:000263923000011
PM 19243040
ER
PT J
AU O'Driscoll, KTA
Kamenkovich, VM
AF O'Driscoll, Kieran T. A.
Kamenkovich, Vladimir M.
TI Dynamics of the Indonesian seas circulation. Part I - The influence of
bottom topography on temperature and salinity distributions
SO JOURNAL OF MARINE RESEARCH
LA English
DT Article
ID COORDINATE OCEAN MODELS; THROUGHFLOW APPEAR; NORTH PACIFIC; INDIAN
OCEANS; MIXED-LAYER; ORIGINATE; WATER; THERMOCLINE; SIMULATION; PATHWAYS
AB The influence of bottom topography on the distribution of temperature and salinity in the Indonesian seas region has been studied with a high-resolution model based on the Princeton Ocean Model. One of the distinctive properties of the model is an adequate reproduction of all major topographic features in the region by the model bottom relief. The three major routes of flow of Pacific water through the region have been identified. The western route follows the flow of North Pacific Water through the Sulawesi Sea, Makassar Strait, Flores Sea, and Banda Sea. This is the main branch of the Indonesian Throughflow. The eastern routes follow the flow of South Pacific water through the eastern Indonesian seas. This water enters the region either through the Halmahera Sea or by flowing to the north around Halmahera Island into the Morotai Basin and then into the Maluku Sea. A deep southward flow of South Pacific Water fills the Seram Sea below 1200 to through the Lifamatola Passage. As it enters the Seram Sea, this overflow turns eastward at depths greater than 2000 m, then upwells in the eastern part of the Seram Sea before returning westward at similar to 1500-2000 m. The flow continues westward across the Seram Sea, spreading to greater depths before entering the Banda Sea at the Buru-Mangole passage. It is this water that shapes the temperature and salinity of the deep Banda Sea. Topographic elevations break the Indonesian seas region down into separate basins. The difference in the distributions of potential temperature, theta, and salinity, S, in adjacent basins is primarily due to specific properties of advection of theta and S across a topographic rise. By and large, the topographic rise blocks deep flow between basins whereas water shallower than the depth of the rise is free to flow between basins. To understand this process, the structure of simulated fields of temperature and salinity has been analyzed. To identify a range of advected theta or S, special sections over the sills with isotherms or isohalines and isotachs of normal velocity have been considered. Following this approach the impact of various topographic rises on the distribution of theta and S has been identified. There are no substantial structural changes of potential temperature and salinity distributions between seasons, though values of some parameters of temperature and salinity distributions, e.g., magnitudes of maxima and minima, can change. It is shown that the main structure of the observed distributions of temperature and salinity is satisfactorily reproduced by the model throughout the entire domain.
C1 [O'Driscoll, Kieran T. A.] USN, Oceanog Off, Stennis Space Ctr, MS 39529 USA.
[O'Driscoll, Kieran T. A.; Kamenkovich, Vladimir M.] Univ So Mississippi, Dept Marine Sci, Stennis Space Ctr, MS 39529 USA.
RP O'Driscoll, KTA (reprint author), Univ Hamburg, Inst Oceanog, Martinistr 52, D-20146 Hamburg, Germany.
EM kieran.odriscoll@zmaw.de
NR 37
TC 7
Z9 7
U1 0
U2 7
PU SEARS FOUNDATION MARINE RESEARCH
PI NEW HAVEN
PA YALE UNIV, KLINE GEOLOGY LAB, 210 WHITNEY AVENUE, NEW HAVEN, CT
06520-8109 USA
SN 0022-2402
J9 J MAR RES
JI J. Mar. Res.
PD MAR
PY 2009
VL 67
IS 2
BP 119
EP 157
PG 39
WC Oceanography
SC Oceanography
GA 488UI
UT WOS:000269375200002
ER
PT J
AU Kamenkovich, VM
O'Driscoll, KTA
Nechaev, DA
AF Kamenkovich, Vladimir M.
O'Driscoll, Kieran T. A.
Nechaev, Dmitri A.
TI Dynamics of the Indonesian seas circulation. Part II - The role of
pressure head
SO JOURNAL OF MARINE RESEARCH
LA English
DT Article
ID INDO-PACIFIC THROUGHFLOW; WATER MASS TRANSFORMATION; INDIAN-OCEAN; WORLD
OCEAN; MAKASSAR STRAIT; MODEL; TRANSPORT; VARIABILITY; FLOW; GRADIENT
AB The aim of this paper is to analyze the role of the pressure head, i.e., the difference of total pressure forces acting on the Indonesian seas waters from the western Pacific and the eastern Indian Ocean, in driving the Indonesian Throughflow (ITF) and in determining the total transport of the ITF. These questions have been discussed in the literature but no consensus has been reached. A regional model of the Indonesian seas circulation has been developed that properly resolves all major topographic features in the region. The results of model runs have been used to calculate all components of the overall momentum balance. The estimates disclose that the dynamical balance is primarily between the volume integrated Coriolis acceleration, pressure gradient and the area integral of local wind stress. It is shown that consideration of components of momentum balance in the direction of the outflow through the Indian Ocean port leads to the formulation of a diagnostic relation between total inflow transports due to the Mindanao and New Guinea Coastal Currents and the external pressure head, internal pressure head, bottom form stress, and area integrated wind stress. Based on this relation, it is concluded that the external pressure head is nor the major driving force of the ITF which is why there is no unique relation between the total transport of the ITF and the external pressure head. However, Wyrtki's suggestion to monitor the variability of the total transport of the ITF by measurement of the sea-surface-height difference between the western Pacific and the eastern Indian Ocean is validated.
C1 [Kamenkovich, Vladimir M.; O'Driscoll, Kieran T. A.; Nechaev, Dmitri A.] Univ So Mississippi, Dept Marine Sci, Stennis Space Ctr, MS 39529 USA.
[O'Driscoll, Kieran T. A.] USN, Oceanog Off, Stennis Space Ctr, MS 39529 USA.
RP Kamenkovich, VM (reprint author), Univ So Mississippi, Dept Marine Sci, Stennis Space Ctr, MS 39529 USA.
EM kieran.odriscoll@zmaw.de
FU National Science Foundation [OCE 96-33470, OCE 01-18200]
FX V. Kamenkovich and D. Nechaev gratefully acknowledge the support from
the National Science Foundation through grants OCE 96-33470 (V.
Kamenkovich) and OCE 01-18200 (V. Kamenkovich and D. Nechaev). K.
O'Driscoll would like to thank the Naval Oceanographic Office for
supporting his graduate education. We are very grateful to G. Veronis
and anonymous reviewers for helpful comments. We are thankful to D.
Rosenfield for help with Delta(eta) over bar calculations.
NR 50
TC 7
Z9 7
U1 0
U2 7
PU SEARS FOUNDATION MARINE RESEARCH
PI NEW HAVEN
PA YALE UNIV, KLINE GEOLOGY LAB, 210 WHITNEY AVENUE, NEW HAVEN, CT
06520-8109 USA
SN 0022-2402
J9 J MAR RES
JI J. Mar. Res.
PD MAR
PY 2009
VL 67
IS 2
BP 159
EP 184
PG 26
WC Oceanography
SC Oceanography
GA 488UI
UT WOS:000269375200003
ER
PT J
AU Jangveladze, T
Kiguradze, Z
Neta, B
AF Jangveladze, Temur
Kiguradze, Zurab
Neta, Beny
TI Large time behavior of solutions to a nonlinear integro-differential
system
SO JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
LA English
DT Article
DE Nonlinear integro-differential system; Asymptotic behavior of solutions
as t -> infinity
ID INTEGRO-DIFFERENTIAL EQUATION; MAGNETIC-FIELD; EXISTENCE; ASYMPTOTICS;
SUBSTANCE; FLUIDS
AB Asymptotic behavior of solutions as t ->infinity to the nonlinear integro-differential system associated with the penetration of a magnetic field into a substance is studied. Initial-boundary Value problems with two kinds of boundary data are considered. The first with homogeneous conditions on whole boundary and the second with non-homogeneous boundary data on one side of lateral boundary. The rates of convergence are given too. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Jangveladze, Temur; Kiguradze, Zurab] Ilia Chavchavadze State Univ, GE-0179 Tbilisi, Rep of Georgia.
[Jangveladze, Temur; Kiguradze, Zurab] Ivane Javakhishvili Tbilisi State Univ, GE-0186 Tbilisi, Rep of Georgia.
[Neta, Beny] USN, Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
RP Kiguradze, Z (reprint author), Ilia Chavchavadze State Univ, 1 Chavchavadze Av 32, GE-0179 Tbilisi, Rep of Georgia.
EM zkigur@yahoo.com
RI Neta, Beny/B-1737-2009;
OI Kiguradze, Zurab/0000-0002-2463-5882; Jangveladze,
Temur/0000-0003-1418-0105
NR 29
TC 10
Z9 10
U1 0
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-247X
J9 J MATH ANAL APPL
JI J. Math. Anal. Appl.
PD MAR 1
PY 2009
VL 351
IS 1
BP 382
EP 391
DI 10.1016/j.jmaa.2008.10.016
PG 10
WC Mathematics, Applied; Mathematics
SC Mathematics
GA 385WS
UT WOS:000261844900036
ER
PT J
AU Lawson, L
AF Lawson, Letitia
TI The politics of anti-corruption reform in Africa
SO JOURNAL OF MODERN AFRICAN STUDIES
LA English
DT Article
ID ECONOMIC-REFORM
AB Previous research on anti-corruption reform in Africa falls into two camps. The first explores 'best practices' and policy approaches to controlling corruption, while the second focuses on the politics of anti-corruption 'reform', arguing that official anti-corruption campaigns aim to mollify donors While Using corruption charges instrumentally to undermine rivals and shore tip personal loyalty to the president, and thus have no chance of controlling corruption. This paper suggests that, while the neopatrimonial context is a very significant limiting factor in anti-corruption reform, limited progress is possible. Examining the motivations and effects, intended and unintended, of anti-corruption reforms in Kenya and Nigeria, it finds that while the Kenya Anti-Corruption Commission has indeed been politically marginalised and largely ineffectual, the more autonomous and activist, but politically instrumentalised, Economic and Financial Crimes Commission in Nigeria has had a measure of Success. The analysis Suggests that this is explained by the EFCC's independent prosecutorial powers and the institutionalisation strategies of its chairman.
C1 USN, Postgrad Sch, Monterey, CA USA.
RP Lawson, L (reprint author), USN, Postgrad Sch, Monterey, CA USA.
EM lllawson@nps.edu
NR 41
TC 25
Z9 25
U1 5
U2 22
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-278X
J9 J MOD AFR STUD
JI J. Mod. Afr. Stud.
PD MAR
PY 2009
VL 47
IS 1
BP 73
EP 100
DI 10.1017/S0022278X08003662
PG 28
WC Area Studies
SC Area Studies
GA 419HJ
UT WOS:000264209900004
ER
PT J
AU Yaremchuk, M
McCreary, J
Yu, ZJ
Furue, R
AF Yaremchuk, Max
McCreary, Julian, Jr.
Yu, Zuojun
Furue, Ryo
TI The South China Sea Throughflow Retrieved from Climatological Data
SO JOURNAL OF PHYSICAL OCEANOGRAPHY
LA English
DT Article
ID INDIAN-OCEAN; INDONESIAN THROUGHFLOW; VARIABILITY; CIRCULATION; PACIFIC;
TAIWAN; TRANSPORT; DYNAMICS; WATER; INTRUSION
AB The salinity distribution in the South China Sea (SCS) has a pronounced subsurface maximum from 150-220 m throughout the year. This feature can only be maintained by the existence of a mean flow through the SCS, consisting of a net inflow of salty North Pacific tropical water through the Luzon Strait and outflow through the Mindoro, Karimata, and Taiwan Straits. Using an inverse modeling approach, the authors show that the magnitude and space-time variations of the SCS thermohaline structure, particularly for the salinity maximum, allow a quantitative estimate of the SCS throughflow and its distribution among the three outflow straits. Results from the inversion are compared with available observations and output from a 50-yr simulation of a highly resolved ocean general circulation model.
The annual-mean Luzon Strait transport is found to be 2.4 +/- 6 0.6 Sv (Sv equivalent to 10(6) m(3) s(-1)). This inflow is balanced by the outflows from the Karimata (0.3 +/- 0.5 Sv), Mindoro (1.5 +/- 0.4), and Taiwan (0.6 +/- 0.5 Sv) Straits. Results of the inversion suggest that the Karimata transport tends to be overestimated in numerical models. The Mindoro Strait provides the only passage from the SCS deeper than 100 m, and half of the SCS throughflow (1.2 +/- 0.3 Sv) exits the basin below 100 m in the Mindoro Strait, a result that is consistent with a climatological run of a 0.1 degrees global ocean general circulation model.
C1 [Yaremchuk, Max; McCreary, Julian, Jr.; Yu, Zuojun; Furue, Ryo] Univ Hawaii Manoa, Int Pacific Res Ctr, Honolulu, HI 96822 USA.
RP Yaremchuk, M (reprint author), Naval Res Lab, Code 7323,Bldg 1009, Stennis Space Ctr, MS 39529 USA.
EM ymax@hawaii.edu
FU Japan Agency for Marine-Earth Science and Technology (JAMSTEC); NASA
[NNX07AG53G]; NOAA [NA17RJ1230]; International Pacific Research Center
FX This study was supported by the Japan Agency for Marine-Earth Science
and Technology (JAMSTEC), by NASA through Grant NNX07AG53G, and by NOAA
through Grant NA17RJ1230 through their sponsorship of the research
activities at the International Pacific Research Center.
NR 42
TC 30
Z9 34
U1 0
U2 8
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0022-3670
EI 1520-0485
J9 J PHYS OCEANOGR
JI J. Phys. Oceanogr.
PD MAR
PY 2009
VL 39
IS 3
BP 753
EP 767
DI 10.1175/2008JPO3955.1
PG 15
WC Oceanography
SC Oceanography
GA 431ZV
UT WOS:000265104200016
ER
PT J
AU Gould, BD
Baturina, OA
Swider-Lyons, KE
AF Gould, Benjamin D.
Baturina, Olga A.
Swider-Lyons, Karen E.
TI Deactivation of Pt/VC proton exchange membrane fuel cell cathodes by
SO2, H2S and COS
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Fuel cells; Hydrogen sulfide; Sulfur dioxide; Air contaminant; Platinum
ID INDEX SINGLE-CRYSTALS; HYDROGEN-SULFIDE; SULFUR-DIOXIDE;
PLATINUM-ELECTRODES; TRANSITION-METALS; OXYGEN REDUCTION;
ELECTROCATALYTIC PROPERTIES; ELECTROCHEMICAL-BEHAVIOR; STRUCTURE
SENSITIVITY; PEMFC PERFORMANCE
AB Sulfur contaminants in air pose a threat to the successful operation of proton exchange membrane fuel cells (PEMFCs) via poisoning of the Pt-based cathodes. The deactivation behavior of commercial Pt on Vulcan carbon (Pt/VC) membrane electrode assemblies (MEAs) is determined when exposed to 1 ppm (dry) of SO(2), H(2)S, or COS in air for 3, 12, and 24 h while held at a constant potential of 0.6V. All the three sulfur compounds cause the same deactivation behavior in the fuel cell cathodes, and the polarization curves of the poisoned MEAs have the same decrease in performance. Sulfur coverages after Multiple exposure times (3, 12, and 24h) are determined by cyclic voltammetry (CV). As the exposure time to sulfur contaminants increases from 12 to 24 h, the sulfur coverage of the platinum saturates at 0.45. The sulfur is removed from the cathodes and their activity is partially restored both by cyclic voltammetry, as shown by others, and by successive polarization curves. Complete recovery of fuel cell performance is not achieved with either technique, Suggesting that sulfur species permanently affect the surface of the catalyst. (C) 2008 Elsevier B.V. All rights reserved
C1 [Gould, Benjamin D.; Baturina, Olga A.; Swider-Lyons, Karen E.] USN, Res Lab, Washington, DC 20375 USA.
RP Gould, BD (reprint author), USN, Res Lab, Code 6113, Washington, DC 20375 USA.
EM benjamin.gould@nrl.navy.mil
FU Office of Naval Research; American Society of Engineering Education
postdoctoral fellowship
FX The authors would like to thank the Office of Naval Research for support
of this work. BDG is an American Society of Engineering Education
postdoctoral fellowship.
NR 48
TC 57
Z9 58
U1 4
U2 33
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
J9 J POWER SOURCES
JI J. Power Sources
PD MAR 1
PY 2009
VL 188
IS 1
BP 89
EP 95
DI 10.1016/j.jpowsour.2008.11.072
PG 7
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 421XK
UT WOS:000264391400013
ER
PT J
AU Lynch, JR
Clinton, JM
Dewing, CB
Warme, WJ
Matsen, FA
AF Lynch, Joseph R.
Clinton, Jeremiah M.
Dewing, Christophr B.
Warme, Winston J.
Matsen, Frederick A., III
TI Treatment of osseous defects associated with anterior shoulder
instability
SO JOURNAL OF SHOULDER AND ELBOW SURGERY
LA English
DT Review
ID ARTHROSCOPIC BANKART REPAIR; HILL-SACHS LESION; GLENOID BONE LOSS;
FOLLOW-UP; BRISTOW PROCEDURE; GLENOHUMERAL INSTABILITY; SURGICAL REPAIR;
DISLOCATION; STABILITY; OUTCOMES
AB Bone loss of the glenoid and/or humerus is a common consequence of traumatic anterior shoulder instability and can be a cause of recurrent instability after a Bankart repair. Accurate characterization of the size and location of osseous defects associated with traumatic instability is important when planning treatment. Open or arthroscopic soft tissue repairs are usually sufficient when less than 25% of the width of the glenoid bone has been lost. Bone replacement techniques may be necessary when glenoid bone loss is greater than 25% of the glenoid width. Glenoid bone restoration techniques include the use of a tricortical iliac crest graft or the transfer of the coracoid process to the area of glenoid deficiency. Bone grafting becomes a strong consideration when soft tissue repairs have failed to res tore stability. Treatment of these severe defects may be followed by osteoarthritis. The destabilizing effects of anterior glenoid bone defects are compounded by concurrent defects of the posterior-lateral humeral head, commonly known as Hill-Sachs lesions, which can engage the glenoid defect. Large humeral head defects can be treated by transhumeral bone grafting techniques or osteoarticular allograft reconstruction. Prosthetic replacement of the proximal humerus is considered for humeral head defects involving more than 40% of the articular surface. Understanding the importance of humeral and glenoid bone deficiencies may help guide the treatment of recurrent anterior glenohumeral instability (C) 2009 Journal of Shoulder and Elbow Surgery Board of Trustees.
C1 [Lynch, Joseph R.] USN, Hosp Bremerton, Dept Orthopaed Surg, Bremerton, WA 98312 USA.
[Clinton, Jeremiah M.; Warme, Winston J.; Matsen, Frederick A., III] Univ Washington, Sch Med, Dept Orthopaed & Sports Med, Seattle, WA USA.
[Dewing, Christophr B.] Steadman Hawkins Fellowship Program, Vail, CO USA.
RP Lynch, JR (reprint author), USN, Hosp Bremerton, Dept Orthopaed, 1 Boone Rd,Code 042, Bremerton, WA 98312 USA.
EM lynch@post.harvard.edu
NR 66
TC 67
Z9 70
U1 0
U2 3
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 MAR-APR
PY 2009
VL 18
IS 2
BP 317
EP 328
DI 10.1016/j.jse.2008.10.013
PG 12
WC Orthopedics; Sport Sciences; Surgery
SC Orthopedics; Sport Sciences; Surgery
GA 411ZI
UT WOS:000263692600027
PM 19218054
ER
PT J
AU Sampson, AR
Singh, H
Whitaker, LR
AF Sampson, Allan R.
Singh, Harshinder
Whitaker, Lyn R.
TI Simultaneous confidence bands for isotonic functions
SO JOURNAL OF STATISTICAL PLANNING AND INFERENCE
LA English
DT Article
DE Simultaneous confidence bands; order restricted inference; Isotonic
regression; Bandwidth
ID DOSE-RESPONSE CURVES
AB Procedures for simultaneous confidence bands are provided for bivariate regression data {chi,Y(chi),chi is an element of x}, where EY(chi) is an unknown monotonic function of x. A new bandwidth procedure is introduced which generalizes the previously introduced procedures of Korn [1982. Confidence bands for isotonic dose-response curves. Appl. Statist. 31, 59-63] and Lee [1996. On estimation for monotone dose-response curves. J. Amer. Statist. Assoc. 91, 1110-1119]. To gain insight into the comparability and applicability of these procedures a unifying geometric framework is used. This framework leads to certain optimality results for these banding procedures and allows for extensions to settings that have not been previously considered. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Sampson, Allan R.] Univ Pittsburgh, Dept Stat, Pittsburgh, PA 15260 USA.
[Singh, Harshinder] W Virginia Univ, Morgantown, WV 26506 USA.
[Whitaker, Lyn R.] USN, Postgrad Sch, Dept Operat Res, Monterey, CA USA.
RP Sampson, AR (reprint author), Univ Pittsburgh, Dept Stat, Pittsburgh, PA 15260 USA.
EM asampson@pitt.edu
NR 12
TC 2
Z9 2
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 MAR 1
PY 2009
VL 139
IS 3
BP 828
EP 842
DI 10.1016/j.jspi.2008.05.045
PG 15
WC Statistics & Probability
SC Mathematics
GA 389AE
UT WOS:000262061300012
ER
PT J
AU Romano, AJ
Abraham, PB
Valdivia, NP
Houston, BH
Bucaro, JA
Dey, S
AF Romano, Anthony J.
Abraham, P. B.
Valdivia, N. P.
Houston, B. H.
Bucaro, J. A.
Dey, S.
TI Conformal Fourier wavenumber decompositions on continuous differentiable
surfaces
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
DE extrapolation; finite element analysis; Fourier analysis; spectral
analysis; vibrations
ID BOUNDARY-ELEMENT METHODS; CONICAL SHELLS; PROPAGATION; FIELD
AB In this manuscript, a method is introduced for the evaluation of Fourier wavenumber decompositions on C(1) vibrating surfaces for spatial-spectral analysis. Whereas typical Fourier analysis is restricted to geometries that are separable for meaningful interpretations of the corresponding wave motion, this approach allows for conformal spectral analysis along curved surfaces. This is accomplished by restricting the wavevectors to lie within the local tangent to the surface and to be spatially dependent. The theoretical development is presented and it is demonstrated that commonly utilized kernels appropriate for some simple geometries can be recovered. Additionally, this approach is applied in the analysis of the vibration and radiation of a point driven, fluid loaded cone, where the displacements and pressures have been obtained using the finite element method.
C1 [Romano, Anthony J.; Abraham, P. B.; Valdivia, N. P.; Houston, B. H.] USN, Res Lab, Phys Acoust Branch, Washington, DC 20375 USA.
[Bucaro, J. A.] SET Inc, Springfield, VA 22151 USA.
[Dey, S.] SFA Inc, Crofton, MD 21114 USA.
RP Romano, AJ (reprint author), USN, Res Lab, Phys Acoust Branch, Washington, DC 20375 USA.
EM anthony.romano@nrl.navy.mil
FU Office of Naval Research; SERDP
FX The authors would like to thank Dr. Earl G. Williams and Dr. Louis R.
Dragonette for their very useful discussions and insight provided
throughout this research. This work was supported by the Office of Naval
Research and the SERDP Program.
NR 20
TC 0
Z9 0
U1 0
U2 1
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 MAR
PY 2009
VL 125
IS 3
BP 1461
EP 1472
DI 10.1121/1.3068450
PG 12
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 415CL
UT WOS:000263911800026
PM 19275304
ER
PT J
AU Hendricks, EA
Schubert, WH
Taft, RK
Wang, HQ
Kossin, JP
AF Hendricks, Eric A.
Schubert, Wayne H.
Taft, Richard K.
Wang, Huiqun
Kossin, James P.
TI Life Cycles of Hurricane-Like Vorticity Rings
SO JOURNAL OF THE ATMOSPHERIC SCIENCES
LA English
DT Article
ID VORTEX ROSSBY-WAVES; POTENTIAL VORTICITY; TROPICAL CYCLONES; MAXIMUM
INTENSITY; KINETIC-ENERGY; SPIRAL BANDS; PART I; EYE; EVOLUTION;
MESOVORTICES
AB The asymmetric dynamics of potential vorticity mixing in the hurricane inner core are further advanced by examining the end states that result from the unforced evolution of hurricane-like vorticity rings in a non-divergent barotropic model. The results from a sequence of 170 numerical simulations are summarized. The sequence covers a two-dimensional parameter space, with the first parameter defining the hollowness of the vortex (i.e., the ratio of eye to inner-core relative vorticity) and the second parameter defining the thickness of the ring (i.e., the ratio of the inner and outer radii of the ring). In approximately one-half of the cases, the ring becomes barotropically unstable, and there ensues a vigorous vorticity mixing episode between the eye and eyewall. The output of the barotropic model is used to (i) verify that the nonlinear model approximately replicates the linear theory of the fastest-growing azimuthal mode in the early phase of the evolution, and (ii) characterize the end states (defined at t = 48 h) that result from the nonlinear chaotic vorticity advection and mixing. It is found that the linear stability theory is a good guide to the fastest-growing exponential mode in the numerical model. Two additional features are observed in the numerical model results. The first is an azimuthal wavenumber-2 deformation of the vorticity ring that occurs for moderately thick, nearly filled rings. The second is an algebraically growing wavenumber-1 instability (not present in the linear theory because of the assumed solution) that is observed as a wobbling eye (or the trochoidal oscillation for a moving vortex) for thick rings that are stable to all exponentially growing instabilities. Most end states are found to be monopoles. For very hollow and thin rings, persistent mesovortices may exist for more than 15 h before merging to a monopole. For thicker rings, the relaxation to a monopole takes longer (between 48 and 72 h). For moderately thick rings with nearly filled cores, the most likely end state is an elliptical eyewall. In this nondivergent barotropic context, both the minimum central pressure and maximum tangential velocity simultaneously decrease over 48 h during all vorticity mixing events.
C1 [Hendricks, Eric A.; Schubert, Wayne H.; Taft, Richard K.] Colorado State Univ, Ft Collins, CO 80523 USA.
[Wang, Huiqun] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Kossin, James P.] Cooperat Inst Meteorol Satellite Studies, Madison, WI USA.
RP Hendricks, EA (reprint author), USN, Res Lab, Monterey, CA 93943 USA.
EM eric.hendricks@nrlmry.navy.mil
RI Kossin, James/D-3929-2011; Kossin, James/C-2022-2016
OI Kossin, James/0000-0003-0461-9794
FU NASA/TCSP [04-0007-0031]; NSF [ATM-0332197]; Colorado State University
FX This research was supported by NASA/TCSP Grant 04-0007-0031, NSF Grant
ATM-0332197, and Colorado State University. We thank Paul Ciesielski,
Christopher Davis, Richard Johnson, Kevin Mallen, Brian McNoldy, Kate
Musgrave, Roger Pielke Sr., Christopher Rozoff, and Jonathan Vigh for
their comments and assistance. This manuscript was improved by the
helpful comments of two anonymous reviewers.
NR 37
TC 23
Z9 23
U1 0
U2 0
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0022-4928
J9 J ATMOS SCI
JI J. Atmos. Sci.
PD MAR
PY 2009
VL 66
IS 3
BP 705
EP 722
DI 10.1175/2008JAS2820.1
PG 18
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 426BB
UT WOS:000264681300008
ER
PT J
AU Penano, J
Sprangle, P
Ting, A
Fischer, R
Hafizi, B
Serafim, P
AF Penano, Joseph
Sprangle, Phillip
Ting, Antonio
Fischer, Richard
Hafizi, Bahman
Serafim, Phillip
TI Optical quality of high-power laser beams in lenses
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
AB We analyze the propagation of a high-power laser beam through a lens and calculate the optical beam quality resulting from geometrical aberrations and thermal nonlinearities. We present a general ray-optics formulation. including diffraction effects, for propagation through a nonlinear medium. An analytical expression for the beam quality parameter M(2) is derived that includes the lowest-order effects of geometrical and thermal aberrations in a thin lens. A ray-optics simulation, including thermal effects, is used to model propagation through a multilens optical beam expander of the type USE-Cl in recent long-range, high-power fiber laser experiments. (C) 2009 Optical Society of America
C1 [Penano, Joseph; Sprangle, Phillip; Ting, Antonio; Fischer, Richard] USN, Res Lab, Washington, DC 20037 USA.
[Hafizi, Bahman] Icarus Res Inc, Bethesda, MD 20824 USA.
[Serafim, Phillip] Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA.
RP Penano, J (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20037 USA.
EM joseph.penano@nrl.navy.mil
FU Office of Naval Research (ONR); High Energy Laser Joint Technology
Office
FX This work is supported by the Office of Naval Research (ONR) and the
High Energy Laser Joint Technology Office.
NR 11
TC 10
Z9 11
U1 0
U2 3
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0740-3224
J9 J OPT SOC AM B
JI J. Opt. Soc. Am. B-Opt. Phys.
PD MAR
PY 2009
VL 26
IS 3
BP 503
EP 510
PG 8
WC Optics
SC Optics
GA 424UI
UT WOS:000264593400018
ER
PT J
AU Tsoi, S
Griva, I
Trammell, SA
Blum, AS
Schnur, JM
Lebedev, N
AF Tsoi, S.
Griva, I.
Trammell, S. A.
Blum, A. S.
Schnur, J. M.
Lebedev, N.
TI Molecular conductance switching via controlled alteration of electron
delocalization: Quinone-modified oligo(phenylenevinylene)
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 21st International Vacuum Nanoelectronics Conference
CY JUL 13-17, 2008
CL Wroclaw, POLAND
ID ATOMIC-FORCE MICROSCOPY; SINGLE MOLECULES; GOLD ELECTRODES; MONOLAYERS;
MECHANISM; JUNCTIONS; AU(111); DENSITY; DEVICES; STATE
AB Reversible conductance switching in single quinone-modified oligo(phenylenevinylene)s (OPV) was studied using electrochemical scanning tunnel microscopy. The switching was achieved through electrochemical oxidation/reduction in the quinone moiety of the molecule. The strong electron delocalization of the reduced hydroquinone-OPV structure resulted in the high-conductance state, whereas the weaker delocalization of the oxidized quinone-OPV was responsible for the low-conductance state. The ratio of the conductances was measured to be in excess of 40. (C) 2009 American Vacumn Societh. [DOI: 10.1116/1.3056177]
C1 [Tsoi, S.; Trammell, S. A.; Blum, A. S.; Lebedev, N.] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
[Griva, I.] George Mason Univ, Dept Math, Fairfax, VA 22030 USA.
[Griva, I.] George Mason Univ, Dept Computat & Data Sci, Fairfax, VA 22030 USA.
[Schnur, J. M.] George Mason Univ, Coll Sci, Fairfax, VA 22030 USA.
RP Tsoi, S (reprint author), USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
EM igriva@gmu.edu; jmschnur@gmail.com; nlebedev@cbmse.nrl.navy.mil
NR 35
TC 3
Z9 3
U1 0
U2 8
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 MAR-APR
PY 2009
VL 27
IS 2
BP 817
EP 820
DI 10.1116/1.3056177
PG 4
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 442KF
UT WOS:000265839400053
ER
PT J
AU Ferrara, S
AF Ferrara, Stephen
TI Radiology Afloat: The Impact of Diagnostic and Interventional Radiology
during the 2005 Tsunami Relief Effort Aboard the USNS Mercy
SO JOURNAL OF VASCULAR AND INTERVENTIONAL RADIOLOGY
LA English
DT Article
C1 USN, San Diego Med Ctr, Dept Radiol, Dept Clin Invest,KCA, San Diego, CA 92134 USA.
RP Ferrara, S (reprint author), USN, San Diego Med Ctr, Dept Radiol, Dept Clin Invest,KCA, 34800 Bob Wilson Dr,Suite 5, San Diego, CA 92134 USA.
EM stephen.ferrara@med.navy.mil
NR 4
TC 0
Z9 0
U1 1
U2 1
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1051-0443
J9 J VASC INTERV RADIOL
JI J. Vasc. Interv. Radiol.
PD MAR
PY 2009
VL 20
IS 3
BP 289
EP 302
DI 10.1016/j.jvir.2008.10.026
PG 14
WC Radiology, Nuclear Medicine & Medical Imaging; Peripheral Vascular
Disease
SC Radiology, Nuclear Medicine & Medical Imaging; Cardiovascular System &
Cardiology
GA 417NS
UT WOS:000264083600001
PM 19112030
ER
PT J
AU Olsen, EA
AF Olsen, Edward A.
TI Bolstering the US Commitment to Improved Inter-Korean Relations
SO KOREA OBSERVER
LA English
DT Review
DE Reconciliation; Reunification; Nuclear Weapons; Sunshine Policy; Axis of
Evil; Peace Process; Geopolitics; 9/11; Non-Proliferation; Brinkmanship;
Six-Party Talks; Carter; GHW Bush; Clinton; GW Bush; McCain; Obama
AB U.S. policy toward the inter-Korean relations of a divided Korea draws upon a complex historical legacy of the 19(th) and 20(th) centuries which influences current and future policy options. American cooperation with the ROK and adversarial relations with the DPRK symbolize the essence of the U.S. role between the two Koreas, but they also provide the framework for post-Cold War U.S. approaches to inter-Korean relations. North Korea's post-Cold War strategic brinkmanship and nuclear agenda have escalated tensions, but also caused Americans during the Clinton and Bush administrations to consider more creative alternatives for dealing with inter-Korean dynamics. U.S. policy options toward inter-Korean affairs also are being shaped by post-9/11 U.S. global security issues and the geopolitical debate they created for the politics of the 2008 presidential election campaigns, setting the stage for the forthcoming Obama administration's potential policies toward Korean relations on bilateral, multilateral, and unification issues. It would be very useful for the Obama administration to support developing a "U.S. Center" focusing on inter-Korean peace and unification.
C1 USN, Postgrad Sch, Natl Secur Affairs & Asian Studies, Monterey, CA USA.
RP Olsen, EA (reprint author), USN, Postgrad Sch, Natl Secur Affairs & Asian Studies, Monterey, CA USA.
EM eaolsenphd@att.net
NR 139
TC 0
Z9 0
U1 2
U2 5
PU INST KOREAN STUDIES
PI SEOUL
PA CPO BOX 3410, SEOUL, 100-364, SOUTH KOREA
SN 0023-3919
J9 KOREA OBS
JI Korea Obs.
PD SPR
PY 2009
VL 40
IS 1
BP 155
EP 199
PG 45
WC Area Studies; International Relations
SC Area Studies; International Relations
GA 423KZ
UT WOS:000264496500006
ER
PT J
AU Cranch, GA
Flockhart, GMH
Kirkendall, CK
AF Cranch, G. A.
Flockhart, G. M. H.
Kirkendall, C. K.
TI High-resolution distributed-feedback fiber laser dc magnetometer based
on the Lorentzian force
SO MEASUREMENT SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 19th International Conference on Optical Fibre Sensors
CY APR 15-18, 2008
CL Perth, AUSTRALIA
SP Univ Western Australia, Opt & Biomed Engn Lab, SPIE, Opt Soc Japan, Opt Soc India, Japan Soc Appl Phys, Inst Elect, Informat & Commun Engineers, Japan Elect Soc, Opt Soc Korea, Opt Soc Amer, Australian Opt Soc, Soc Instrument & Control Engineers, Perth Convent Bur
DE DFB fiber laser; fiber-optic sensor; magnetometer; thermal noise;
Lorentz force
ID THERMAL NOISE; VIBRATION SENSORS; ARRAY
AB A low-frequency magnetic field sensor, based on a current-carrying beam driven by the Lorentzian force, is described. The amplitude of the oscillation is measured by a distributed-feedback fiber laser strain sensor attached to the beam. The transduction mechanism of the sensor is derived analytically using conventional beam theory, which is shown to accurately predict the responsivity of a prototype sensor. Excellent linearity and negligible hysteresis are demonstrated. Noise sources in the fiber laser strain sensor are described and thermo-mechanical noise in the transducer is estimated. The prototype sensor achieves a magnetic field resolution of 5 nT Hz for 25 mA of current, which is shown to be close to the predicted thermo-mechanical noise limit of the sensor. The current is supplied optically through a separate optical fiber yielding an electrically passive sensor head.
C1 [Cranch, G. A.; Flockhart, G. M. H.; Kirkendall, C. K.] USN, Res Lab, Washington, DC 20375 USA.
RP Cranch, GA (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM geoff.cranch@nrl.navy.mil
RI Flockhart, Gordon/B-9664-2009
OI Flockhart, Gordon/0000-0002-8777-7511
NR 28
TC 15
Z9 15
U1 0
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-0233
EI 1361-6501
J9 MEAS SCI TECHNOL
JI Meas. Sci. Technol.
PD MAR
PY 2009
VL 20
IS 3
AR 034023
DI 10.1088/0957-0233/20/3/034023
PG 11
WC Engineering, Multidisciplinary; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 403CW
UT WOS:000263060900024
ER
PT J
AU Brophy, C
Roy, G
AF Brophy, Chris
Roy, Gabriel
TI Benefits and Challenges of Pressure-Gain Combustion Systems for Gas
Turbines
SO MECHANICAL ENGINEERING
LA English
DT Editorial Material
C1 [Brophy, Chris] USN, Postgrad Sch, Rocket Prop Lab, Monterey, CA USA.
[Roy, Gabriel] Off Naval Res, Arlington, VA 22217 USA.
RP Brophy, C (reprint author), USN, Postgrad Sch, Rocket Prop Lab, Monterey, CA USA.
EM cmbrophy@nps.edu
NR 0
TC 0
Z9 0
U1 0
U2 2
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0025-6501
J9 MECH ENG
JI Mech. Eng.
PD MAR
PY 2009
VL 131
IS 3
BP 54
EP 55
PG 2
WC Engineering, Mechanical
SC Engineering
GA 616ZG
UT WOS:000279249900033
ER
PT J
AU Bachmann, RJ
Boria, FJ
Vaidyanathan, R
Ifju, PG
Quinn, RD
AF Bachmann, Richard J.
Boria, Frank J.
Vaidyanathan, Ravi
Ifju, Peter G.
Quinn, Roger D.
TI A biologically inspired micro-vehicle capable of aerial and terrestrial
locomotion
SO MECHANISM AND MACHINE THEORY
LA English
DT Article
DE Micro air vehicles; Crawling robots; Multi-modal mobility; Micro robots;
Biologically inspired robotics
ID COCKROACH; FLIGHT; WINGS; ROBOT; MODEL
AB This paper reports the design, fabrication, and field testing of a small (30.5 cm wingspan) robot capable of aerial and terrestrial locomotion. The micro air-land vehicle (MALV)flies using a chord-wise, undercambered, bat-like compliant wing and walks over rough terrain using passively compliant wheel-leg running gear. MALV successfully performs transitions from flight to walking and in some situations, from walking to flight. The lightweight (similar to 100 g) carbon fiber vehicle can fly, land, and crawl with a sensor payload exceeding 20% its own mass. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Vaidyanathan, Ravi] Univ Bristol, Bristol BS8 1TH, Avon, England.
[Bachmann, Richard J.] BioRobots LLC Cleveland, Cleveland, OH 44127 USA.
[Boria, Frank J.; Ifju, Peter G.] Univ Florida, Gainesville, FL 32611 USA.
[Vaidyanathan, Ravi] USN, Postgrad Sch, Monterey, CA 93943 USA.
[Quinn, Roger D.] Case Western Reserve Univ, Cleveland, OH 44106 USA.
RP Vaidyanathan, R (reprint author), Univ Bristol, Room 2-50,Queens Bldg,Univ Walk, Bristol BS8 1TH, Avon, England.
EM r.j.bachmann@bio-robots.com; frankboria@gmail.com; rxv@case.edu;
ifju@ufl.edu; rdq@case.edu
FU US Department of Defense [FA8651-04-C-0234, FA8651-05-C-0097]; US
Special Operations Command-Naval Postgraduate School (USSOCOM-NPS)
FX This work was supported in part by the US Department of Defense under
Contracts FA8651-04-C-0234 and FA8651-05-C-0097 and the US Special
Operations Command-Naval Postgraduate School (USSOCOM-NPS) Field
Experimentation Cooperative Program.
NR 46
TC 32
Z9 32
U1 2
U2 10
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0094-114X
J9 MECH MACH THEORY
JI Mech. Mach. Theory
PD MAR
PY 2009
VL 44
IS 3
BP 513
EP 526
DI 10.1016/j.mechmachtheory.2008.08.008
PG 14
WC Engineering, Mechanical
SC Engineering
GA 406KJ
UT WOS:000263293600002
ER
PT J
AU Yu, Y
Cimeno, A
Lan, YC
Rybczynski, J
Wang, DZ
Paudel, T
Ren, ZF
Wagner, DJ
Qiu, MQ
Chiles, TC
Cai, D
AF Yu, Y.
Cimeno, A.
Lan, Y. C.
Rybczynski, J.
Wang, D. Z.
Paudel, T.
Ren, Z. F.
Wagner, D. J.
Qiu, M. Q.
Chiles, T. C.
Cai, D.
TI Assembly of multi-functional nanocomponents on periodic nanotube array
for biosensors
SO MICRO & NANO LETTERS
LA English
DT Article
ID ALIGNED CARBON NANOTUBES; GLUCOSE BIOSENSOR; HYDROGEN-PEROXIDE;
ELECTRODE; GROWTH; FILMS
AB Patterned carbon nanotube arrays (PCNTAs) with reduced density and length were developed with polystyrene sphere masked catalyst dots followed by the plasma enhanced chemical vapour deposition method. The nanotubes were then uniformly coated with electropolymerised polypyrrole (PPy). The coating thickness was conformally adjustable. Gold nanoparticles (AuNP) together with glucose oxidase (Gox) were doped into the PPy film on the nanotubes to develop a high-performance PCNTA glucose sensor. The sensitivity of the sensor was improved by the co-existence of Gox and AuNP on the carbon nanotube. Moreover, in contrast to previous reported PCNTA glucose sensors, the design herein utilised the entire surface of nanotubes as active sensing areas in order to maximise the faradic currents. This research outlines a practical avenue to fabricate high-performance PCNTA sensor chips with multiple molecules and functional nano-architectures.
C1 [Yu, Y.] Huazhong Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
[Yu, Y.; Lan, Y. C.; Rybczynski, J.; Wang, D. Z.; Paudel, T.; Ren, Z. F.] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
[Cimeno, A.; Chiles, T. C.; Cai, D.] Boston Coll, Dept Biol, Chestnut Hill, MA 02467 USA.
[Wagner, D. J.] USN, Hlth Res Ctr, Detachment Environm Hlth Effects, Wright Patterson AFB, OH 45433 USA.
[Qiu, M. Q.] Huazhong Normal Univ, Coll Chem, Wuhan 430079, Peoples R China.
RP Yu, Y (reprint author), Huazhong Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
EM caid@bc.edu
RI Lan, Yucheng/F-9501-2011; Ren, Zhifeng/B-4275-2014
OI Lan, Yucheng/0000-0002-6737-4168;
FU NIBIB NIH HHS [R43 EB006249, R43 EB006249-01A1]
NR 20
TC 13
Z9 14
U1 0
U2 11
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 1750-0443
J9 MICRO NANO LETT
JI Micro Nano Lett.
PD MAR
PY 2009
VL 4
IS 1
BP 27
EP 33
DI 10.1049/mnl:20080054
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 422UW
UT WOS:000264454200006
PM 19829755
ER
PT J
AU Tucker, E
AF Tucker, Ernest
TI A History of Iran: Empire of the Mind
SO MIDDLE EAST JOURNAL
LA English
DT Book Review
C1 [Tucker, Ernest] USN Acad, Dept Hist, Annapolis, MD 21402 USA.
RP Tucker, E (reprint author), USN Acad, Dept Hist, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU MIDDLE EAST INST
PI WASHINGTON
PA 1761 N ST NW, CIRCULATION DEPT, WASHINGTON, DC 20036-2882 USA
SN 0026-3141
J9 MIDDLE EAST J
JI Middle East J.
PD SPR
PY 2009
VL 63
IS 2
BP 324
EP 325
PG 2
WC Area Studies
SC Area Studies
GA 435DD
UT WOS:000265323000013
ER
PT J
AU Shen, YC
Arkes, J
Pilgrim, J
AF Shen, Yu-Chu
Arkes, Jeremy
Pilgrim, John
TI The Effects of Deployment Intensity on Post-Traumatic Stress Disorder:
2002-2006
SO MILITARY MEDICINE
LA English
DT Article
ID MENTAL-HEALTH PROBLEMS; GULF-WAR VETERANS; IRAQ-WAR; COMBAT;
AFGHANISTAN; POPULATION; CARE; SOLDIERS; SYMPTOMS; MILITARY
AB Objectives: This study examines whether deployment location and the duration of deployment affects the likelihood of being screened positive for PTSD. Methods: Retrospective study of all sailors returning from an overseas deployment between 2002 and 2006 who have completed the Post-Deployment Health Assessment survey. The primary outcome is whether the sailor is screened positive for PTSD. Multivariate analysis is conducted using probit models. Results: Deployment to Iraq and Afghanistan increases the probability of screening positive for PTSD by 6.3 and 1.6 percentage points compared to those who were deployed on ships. This probability is increased by 2.2 percentage points for those deployed longer than 180 days. The negative effect of longer deployments is exacerbated if the deployment is to Iraq or Afghanistan. Conclusions: Our results highlight the importance of providing adequate mental health care resources for those returning from hostile deployments and raise concerns about combat effectiveness of long deployments.
C1 [Shen, Yu-Chu; Arkes, Jeremy] USN, Postgrad Sch, Grad Sch Business & Publ Policy, Monterey, CA 93943 USA.
[Shen, Yu-Chu] Natl Bur Econ Res, Cambridge, MA 02138 USA.
[Arkes, Jeremy] RAND Corp, Santa Monica, CA 90401 USA.
[Pilgrim, John] HQDA, Washington, DC 20310 USA.
RP Shen, YC (reprint author), USN, Postgrad Sch, Grad Sch Business & Publ Policy, 555 Dyer Rd,Code GB, Monterey, CA 93943 USA.
NR 29
TC 18
Z9 19
U1 1
U2 5
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 MAR
PY 2009
VL 174
IS 3
BP 217
EP 223
PG 7
WC Medicine, General & Internal
SC General & Internal Medicine
GA 601KZ
UT WOS:000278059400001
PM 19354082
ER
PT J
AU MacGregor, AJ
Shaffer, RA
Dougherty, AL
Galarneau, MR
Raman, R
Baker, DG
Lindsay, SP
Golomb, BA
Corson, KS
AF MacGregor, Andrew J.
Shaffer, Richard A.
Dougherty, Amber L.
Galarneau, Michael R.
Raman, Rema
Baker, Dewleen G.
Lindsay, Suzanne P.
Golomb, Beatrice A.
Corson, Karen S.
TI Psychological Correlates of Battle and Nonbattle Injury Among Operation
Iraqi Freedom Veterans
SO MILITARY MEDICINE
LA English
DT Article
ID POSTTRAUMATIC-STRESS-DISORDER; COMBAT TRAUMA REGISTRY; MENTAL-HEALTH
PROBLEMS; PERSIAN-GULF-WAR; VIETNAM VETERANS; FOLLOW-UP; AFGHANISTAN;
SOLDIERS; RISK; DEPRESSION
AB Limited research exists on the relationship between physical injury and PTSD within military populations. The present study assessed postinjury rates of PTSD and other psychological correlates among battle and nonbattle injuries. A total of 1,968 men (831 battle injuries and 1,137 nonbattle injuries) injured between September 2004 and February 2005 during Operation Iraqi Freedom (OIF) composed the study sample. Patients were followed through November 2006 for mental health diagnosis (ICD-9 290-319). Compared with nonbattle injuries, those with battle injuries had a greater risk of PTSD and other mental health diagnosis, and there was a positive association with injury severity. Self-reported mental health symptoms were significantly higher for both minor and moderate-severe battle injury in comparison to nonbattle injury and previous population estimates from an earlier OIF period. More research is needed to further define this relationship by examining potential mechanisms and addressing the possible contributing effect of combat exposure.
C1 [MacGregor, Andrew J.; Shaffer, Richard A.; Galarneau, Michael R.; Corson, Karen S.] USN, Hlth Res Ctr, San Diego, CA 92152 USA.
[Dougherty, Amber L.] Sci Applicat Int Corp, San Diego, CA 92121 USA.
[Raman, Rema; Baker, Dewleen G.; Golomb, Beatrice A.] Univ Calif San Diego, San Diego, CA 92103 USA.
[Baker, Dewleen G.] VA San Diego Healthcare Syst, San Diego, CA USA.
[Lindsay, Suzanne P.] San Diego State Univ, San Diego, CA 92182 USA.
RP MacGregor, AJ (reprint author), USN, Hlth Res Ctr, San Diego, CA 92152 USA.
FU Office of Naval Research, Arlington, VA [60332]
FX We thank the Army Medical Surveillance Activity, U.S. Army Center for
Health Promotion and Preventive Medicine for their support in providing
data from Post-Deployment Health Assessments. We also thank Dr. Jerry
Larson, Naval Health Research Center, for his contribution in consulting
on this project. This work was supported by the Office of Naval
Research, Arlington, VA under Work Unit No. 60332.
NR 36
TC 18
Z9 21
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 MAR
PY 2009
VL 174
IS 3
BP 224
EP 231
PG 8
WC Medicine, General & Internal
SC General & Internal Medicine
GA 601KZ
UT WOS:000278059400002
PM 19354083
ER
PT J
AU Lin, H
Ancheta, A
Uzcategui, L
Plurad, D
AF Lin, Henry
Ancheta, Anaclato
Uzcategui, Leo
Plurad, David
TI Surgery in Expeditionary Strike Group
SO MILITARY MEDICINE
LA English
DT Article
AB There is little published data that quantifies the types of surgical and medical cases encountered during a 6-month West Pacific (WestPac) deployment with naval and marine assets. Methods: We report our fleet surgical team case series during a greater than 6-month 2006 WestPac deployment onboard a casualty receiving-and-treatment ship (CRTS) of an expeditionary strike group (ESG), previously known as an amphibious ready group (ARG)-marine expeditionary unit (MEU). Results: One hundred twenty surgical cases were performed but only 37 cases (31%) were urgent; the remaining 82 cases were elective. Of the urgent surgical cases, only 8 cases (6.7%) required the skills of a general surgeon and none were emergent. Conclusion: the role of a surgical team on an ARG MEU mission must be re-evaluated during the decreasing availability of surgical assets during Operation Iraqi Freedom and Operation Enduring Freedom.
C1 [Lin, Henry] Beth Israel Deaconess Med Ctr, Sect Minimally Invas Surg, Boston, MA 02215 USA.
[Ancheta, Anaclato; Uzcategui, Leo] NAVMEDCEN SAN DIEGO, San Diego, CA 92134 USA.
[Plurad, David] USN, Trauma Training Ctr, LA Cty & USC Med Ctr, Unit 6300, Los Angeles, CA 90033 USA.
RP Lin, H (reprint author), Beth Israel Deaconess Med Ctr, Sect Minimally Invas Surg, 330 Brookline Ave,Shapiro TCC 355, Boston, MA 02215 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
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 MAR
PY 2009
VL 174
IS 3
BP 241
EP 244
PG 4
WC Medicine, General & Internal
SC General & Internal Medicine
GA 601KZ
UT WOS:000278059400005
PM 19354086
ER
PT J
AU Wanchick, K
Lucha, P
AF Wanchick, Kara
Lucha, Paul
TI Dedifferentiated Retroperitoneal Liposarcoma Presenting as Lower
Gastrointestinal Bleeding, a Case Report and Review of the Literature
SO MILITARY MEDICINE
LA English
DT Review
ID SOFT-TISSUE SARCOMA; MANAGEMENT; RADIATION; THERAPY
AB Retroperitoneal sarcoma is a rare tumor that accounts for 10-15% of soft tissue malignancies. The incidence is 2.5 per million and liposarcoma accounts for approximately 20% of all retroperitoneal sarcomas. Treatment of retroperitoneal liposarcomas is primarily surgical and the ability to completely resect the tumor is the most important predictor of local recurrence and overall survival. Unfortunately, these tumors are almost always large at the time of diagnosis owing to their slow growth and vague symptoms. Abdominal discomfort is the presenting complaint in 60-70% and palpable mass on 70-80%, lower gastrointestinal bleeding is a rare presentation for these malignancies. These vague symptoms allows them to attain a size and extent which make treatment with tumorcidal doses of radiation difficult and likely to cause significant morbidity. We present a rare case of a dedifferentiated retroperitoneal liposarcoma presenting primarily as a lower gastrointestinal bleeding.
C1 [Wanchick, Kara] USN, Med Ctr, Dept Gen Surg, Portsmouth, VA 23708 USA.
[Lucha, Paul] USN, Med Ctr, Div Colon & Rectal Surg, Portsmouth, VA 23708 USA.
RP Wanchick, K (reprint author), USN, Med Ctr, Dept Gen Surg, 620 John Paul Jones Circle, Portsmouth, VA 23708 USA.
NR 14
TC 3
Z9 3
U1 0
U2 0
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 MAR
PY 2009
VL 174
IS 3
BP 328
EP 330
PG 3
WC Medicine, General & Internal
SC General & Internal Medicine
GA 601KZ
UT WOS:000278059400022
PM 19354103
ER
PT J
AU Lucha, P
AF Lucha, Paul
TI Meckel's Diverticulitis With Associated Enterloith Formation: A Rare
Presentation of an Acute Abdomen in an Adult
SO MILITARY MEDICINE
LA English
DT Article
ID ENTEROLITH; EXPERIENCE
AB Meckel's diverticulum (MD) is the most common congenital anomaly of the gastrointestinal tract, occurring in 2-3% of the population. Enterolith formation associated with MD is a rare entity. We present the case of a 35-year-old active duty sailor who presented with a 24-hour history of worsening abdominal pain and nausea. His exam revealed lower abdominal peritonitis. An abdominal and pelvic CT scan revealed a fluid-filled structure in the pelvis adjacent to the distal small bowel with associated calcifications. Exploratory laparotomy was performed, which revealed an acutely inflamed MD associated with enterolith formation. Consideration of this condition in the differential upon presentation of an acute abdomen is essential, secondary to the morbidity that can accompany it when misdiagnosed.
C1 USN, Med Ctr, Div Colon & Rectal Surg, Portsmouth, VA 23708 USA.
RP Lucha, P (reprint author), USN, Med Ctr, Div Colon & Rectal Surg, 620 John Paul Jones Circle, Portsmouth, VA 23708 USA.
NR 11
TC 1
Z9 1
U1 0
U2 1
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD MAR
PY 2009
VL 174
IS 3
BP 331
EP 333
PG 3
WC Medicine, General & Internal
SC General & Internal Medicine
GA 601KZ
UT WOS:000278059400023
PM 19354104
ER
PT J
AU Garth, TS
AF Garth, Todd S.
TI Intersecting Tangos: Cultural Geographies of Buenos Aires, 1900-1930
SO MLN
LA English
DT Book Review
C1 [Garth, Todd S.] USN Acad, Annapolis, MD 21402 USA.
RP Garth, TS (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 0
U2 3
PU JOHNS HOPKINS UNIV PRESS
PI BALTIMORE
PA JOURNALS PUBLISHING DIVISION, 2715 NORTH CHARLES ST, BALTIMORE, MD
21218-4363 USA
SN 0026-7910
J9 MLN
JI MLN
PD MAR
PY 2009
VL 124
IS 2
BP 520
EP 522
PG 3
WC Literary Theory & Criticism
SC Literature
GA 439JX
UT WOS:000265624500011
ER
PT J
AU Vega, LR
Asari, NV
Fernandes, RC
Garcia-Rissmann, A
Storchi-Bergmann, T
Delgado, RMG
Schmitt, H
AF Vega, L. R.
Asari, N. V.
Fernandes, R. Cid
Garcia-Rissmann, A.
Storchi-Bergmann, T.
Gonzalez Delgado, R. M.
Schmitt, H.
TI The CaT strength in Seyfert nuclei revisited: analysing young stars and
non-stellar light contributions to the spectra
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE galaxies: kinematics and dynamics; galaxies: nuclei; galaxies: Seyfert;
galaxies: stellar content
ID INFRARED CAII TRIPLET; ACTIVE GALACTIC NUCLEI; STELLAR POPULATION
SYNTHESIS; DWARF ELLIPTIC GALAXIES; INITIAL MASS FUNCTION; BLACK-HOLE
MASS; EMPIRICAL CALIBRATION; VELOCITY DISPERSION; GASEOUS KINEMATICS;
NEAR-ULTRAVIOLET
AB In a former paper, we have presented spectra of 64 active, nine normal and five starburst galaxies in the region around the near-infrared calcium triplet (CaT) absorption lines and the [S III]lambda 9069 line. In the present paper, we analyse the CaT strength (W(CaT)) and kinematical products derived in that study, namely stellar (sigma(star)) and ionized gas (sigma(gas)) velocity dispersions. Our main results may be summarized as follows. (1) Type 2 Seyfert galaxies show no sign of dilution in W(CaT) with respect to the values spanned by normal galaxies, even when optical absorption lines such as the CaII K band at 3933 angstrom are much weaker than in old, bulge-like stellar populations. (2) The location of type 2 Seyfert galaxies in the W(CaT)-W(CaK) plane is consistent with evolutionary synthesis models. The implication is that the source responsible for the dilution of optical lines in these active galactic nuclei (AGN) is a young stellar population, rather than an AGN featureless continuum, confirming the conclusion of the pioneer study of Terlevich, Diaz & Terlevich. (3) In type 1 Seyfert galaxies, both W([S III]) and W(CaT) tend to be diluted due to the presence of a non-stellar component, in agreement with the unification paradigm. (4) A comparison of sigma(star) with sigma(gas) (obtained from the core of the [S III] emitting line) confirms the existence of a correlation between the typical velocities of stars and clouds of the narrow line region. The strength and scatter around this correlation are similar to those previously obtained from the [O III]lambda 5007 linewidth.
C1 [Vega, L. R.] Univ Nacl Cordoba, Astron Observ, IATE, Inst Astron Teor & Expt, Cordoba, Argentina.
[Vega, L. R.] Univ Nacl Cordoba, Secretaria Ciencia & Tecn, RA-5000 Cordoba, Argentina.
[Asari, N. V.; Fernandes, R. Cid] Univ Fed Santa Catarina, Florianopolis, SC, Brazil.
[Garcia-Rissmann, A.] European So Observ, D-85748 Garching, Germany.
[Storchi-Bergmann, T.] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil.
[Gonzalez Delgado, R. M.] Inst Astrofis Andalucia CSIC, Granada 18080, Spain.
[Schmitt, H.] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
[Schmitt, H.] Interferometrics Inc, Herdon, VA 20171 USA.
RP Vega, LR (reprint author), Univ Nacl Cordoba, Astron Observ, IATE, Inst Astron Teor & Expt, Laprida 854,X5000BGR, Cordoba, Argentina.
EM luisv@mail.oac.uncor.edu; natalia@astro.ufsc.br; cid@astro.ufsc.br;
agarciar@eso.org; thaisa@if.ufrgs.br; rosa@iaa.es;
henrique.schmitt@nrl.navy.mil
RI Vale Asari, Natalia/F-1207-2013; 7, INCT/H-6207-2013; Astrofisica,
Inct/H-9455-2013; Fernandes, Roberto/M-7334-2014;
OI Vale Asari, Natalia/0000-0003-0842-8688; Fernandes,
Roberto/0000-0001-9672-0296; Gonzalez Delgado, Rosa
Maria/0000-0003-1058-1577
FU Capes; CNPq; Secyt; Spanish Ministry of Science and Technology (MCYT)
[AYA-2001-3939-C03-01]; Laboratorio Nacional de Astrofisica; NASA
FX LRV, NVA, RCF, AGR and TSB acknowledge the support of Capes and CNPq.
LRV acknowledges the support from Secyt and the hospitality of UFSC. RGD
acknowledges support by Spanish Ministry of Science and Technology
(MCYT) through grant AYA-2001-3939-C03-01. We thank Laboratorio Nacional
de Astrofisica for the allocation of time on ESO 1.52m and financial
support during the runs. We also thank the referee, Javier Cenarro, for
the very useful comments which greatly improved the content of the
paper. A part of the data described here was taken at Kitt Peak National
Observatory, National Optical Astronomy Observatories, which are
operated by AURA, Inc., under a cooperative agreement with the National
Science Foundation. Basic research at the NRL is supported by 6.1 base
funding. This research made use of the NASA/IPAC Extragalactic Data base
(NED), which is operated by the Jet Propulsion Laboratory, Caltech,
under contract with NASA.
NR 56
TC 2
Z9 3
U1 0
U2 0
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD MAR 1
PY 2009
VL 393
IS 3
BP 846
EP 857
DI 10.1111/j.1365-2966.2008.13969.x
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 407JL
UT WOS:000263359300012
ER
PT J
AU Lin, KY
Kress, M
Szechtman, R
AF Lin, Kyle Y.
Kress, Moshe
Szechtman, Roberto
TI Scheduling Policies for an Antiterrorist Surveillance System
SO NAVAL RESEARCH LOGISTICS
LA English
DT Article
DE homeland security; counterterrorism; multiclass queue; reneging; dynamic
scheduling
ID BEST-CASE ANALYSIS; MULTICLASS QUEUE; SECURITY; ATTACK; SETUPS
AB This article concerns scheduling policies in a surveillance system aimed at detecting a terrorist attack in time. Terrorist suspects arriving at a public area are subject to continuous monitoring, while a surveillance team takes their biometric signatures and compares them with records stored in a terrorist database. Because the surveillance team can screen only one terrorist suspect at a time, the team faces a dynamic scheduling problem among the Suspects. We build a model consisting of,in M/G/I queue with two types of customers-red and white-to study this problem. Both types of customers are impatient but the reneging time distributions are different. The server only receives it reward by serving a red customer and can use the time it customer hits spent in the queue to deduce its likely type. In a few special cases, a simple service rule-such as first-come-first-serve is optimal. We explain why the problem is in general difficult and we develop a heuristic policy motivated by the fact that terrorist attacks tend to be rare events. (C) 2009 Wiley Periodicals, Inc.* Naval Research Logistics 56: 113-126, 2009
C1 [Lin, Kyle Y.; Kress, Moshe; Szechtman, Roberto] USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
RP Lin, KY (reprint author), USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
EM kylin@nps.edu
FU Research Initiation Program at the Naval Postgraduate School
FX This material is based upon work supported by the Research Initiation
Program at the Naval Postgraduate School. The authors thank Sheldon Ross
and Kevin Glazebrook for helpful discussions, and all associate editor
and two referees for many valuable comments.
NR 20
TC 6
Z9 6
U1 0
U2 4
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0894-069X
J9 NAV RES LOG
JI Nav. Res. Logist.
PD MAR
PY 2009
VL 56
IS 2
BP 113
EP 126
DI 10.1002/nav.20341
PG 14
WC Operations Research & Management Science
SC Operations Research & Management Science
GA 409VI
UT WOS:000263533500002
ER
PT J
AU Allen-Emerson, M
AF Allen-Emerson, Michelle
TI A Mighty Mass of Brick and Smoke: Victorian and Edwardian
Representations of London
SO NINETEENTH-CENTURY LITERATURE
LA English
DT Book Review
C1 [Allen-Emerson, Michelle] USN Acad, Annapolis, MD 21402 USA.
RP Allen-Emerson, M (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 1
U2 1
PU UNIV CALIFORNIA PRESS
PI OAKLAND
PA 155 GRAND AVE, SUITE 400, OAKLAND, CA 94612-3758 USA
SN 0891-9356
J9 NINETEEN CENT LIT
JI Ninet.-Century Lit.
PD MAR
PY 2009
VL 63
IS 4
BP 548
EP U5
PG 5
WC Literature
SC Literature
GA 439XQ
UT WOS:000265661400007
ER
PT J
AU Roehrig, T
AF Roehrig, Terence
TI North Korea and the Northern Limit Line
SO NORTH KOREAN REVIEW
LA English
DT Article
DE Northern Limit Line; North Korea; South Korea; West Sea clashes; West
Sea peace zone; inter-Korean relations
AB Shortly after the end of the Korean War, the United Nations Command promulgated the Northern Limit Line (NLL) as a maritime boundary in the West Sea (Yellow Sea). Since that time, the NLL has been a source of contention between North and South Korea culminating in two naval clashes in 1999 and 2002. A solution to the NLL dispute in the near future is unlikely so long as the security situation remains the same. North Korea may have a reasonable complaint, and an international tribunal would likely draw the line farther south, though not as far as Pyongyang desires. So long as North Korea remains a serious security threat, South Korea will be reluctant to make any changes. The most likely solution will be a negotiated settlement, but this will require North Korea to demonstrate its willingness to compromise on its position. Pyongyang should continue to state its opposition to the current NLL, but through diplomatic channels that do not threaten security while also taking steps to improve the overall security situation in the region. The views expressed in this report are the author's alone and do not represent the official position of the Department of the Navy, the Department of Defense, or the U.S. government.
C1 USN, War Coll, Natl Secur Decis Making Dept, Newport, RI 02841 USA.
RP Roehrig, T (reprint author), USN, War Coll, Natl Secur Decis Making Dept, 686 Cushing Rd,Code 1B, Newport, RI 02841 USA.
EM terence.roehrig@nwc.edu
NR 44
TC 4
Z9 4
U1 0
U2 3
PU MCFARLAND & COMPANY, INC, PUBLISHERS
PI JEFFERSON
PA BOX 611, JEFFERSON, NC 28640 USA
SN 1551-2789
J9 N KOREAN REV
JI North Korean Rev.
PD SPR
PY 2009
VL 5
IS 1
BP 8
EP 22
DI 10.3172/NKR.5.1.8
PG 15
WC Area Studies; International Relations
SC Area Studies; International Relations
GA 514WT
UT WOS:000271427600002
ER
PT J
AU Yeh, PH
Chang, KA
Henriksen, J
Edge, B
Chang, P
Silver, A
Vargas, A
AF Yeh, Po-Hung
Chang, Kuang-An
Henriksen, John
Edge, Billy
Chang, Peter
Silver, Andrew
Vargas, Abel
TI Large-scale laboratory experiment on erosion of sand beds by moving
circular vertical jets
SO OCEAN ENGINEERING
LA English
DT Article
DE Turbulence jet; Moving jet; Bed erosion; Scour; Laboratory measurement
ID TURBULENT JETS
AB This study investigates the topographic deformation due to the erosion of a sand bed impinged by a moving submerged turbulent round jet in a large-scale laboratory. The test conditions represent the case of discharges beneath a vessel while operating in water with a limited clearance such as a shallow navigation channel. The jet moves horizontally and discharges water vertically downward towards the bed. The distance between the jet nozzle and the bed equals six times the jet diameter so the jet flow is in the potential core region. The speed of the jet horizontal motion was varied to examine its effect on the scour profile. The characteristic lengths of the scour profile in the asymptotic state were determined by modifying the empirical formulas in Aderibigbe and Rajaratnam [1996. Erosion of loose beds by submerged circular impinging vertical turbulent jets. journal of Hydraulic Research 34(1), 19-33]. The maximum scour depth, the scour hole radius, and the ridge height were found to be a function of the ratio of the jet exit to jet translation velocities and were modeled using a hyperbolic function. Empirical equations describing the scour profile were developed and the scour profile was found to be self-similar when normalized by appropriate length scales. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Yeh, Po-Hung; Chang, Kuang-An; Henriksen, John; Edge, Billy] Texas A&M Univ, Zachry Dept Civil Engn, College Stn, TX 77843 USA.
[Chang, Peter; Silver, Andrew; Vargas, Abel] USN, Ctr Surface Warfare, Carderock Div, Bethesda, MD 20817 USA.
RP Chang, KA (reprint author), Texas A&M Univ, Zachry Dept Civil Engn, College Stn, TX 77843 USA.
EM kchang@tamu.edu
RI Chang, Kuang-An/D-7556-2015;
OI Chang, Kuang-An/0000-0003-3177-4896; Edge, Billy/0000-0001-9291-3920
FU Naval Surface Warfare Center, Carderock Division, Ship Hydromechanics
Directorate
FX This work was supported by the Naval Surface Warfare Center, Carderock
Division, Ship Hydromechanics Directorate.
NR 6
TC 12
Z9 12
U1 1
U2 9
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0029-8018
J9 OCEAN ENG
JI Ocean Eng.
PD MAR
PY 2009
VL 36
IS 3-4
BP 248
EP 255
DI 10.1016/j.oceaneng.2008.11.006
PG 8
WC Engineering, Marine; Engineering, Civil; Engineering, Ocean;
Oceanography
SC Engineering; Oceanography
GA 437XC
UT WOS:000265519200004
ER
PT J
AU Gordon, RT
Martin, C
Kim, H
Ni, N
Tanatar, MA
Schmalian, J
Mazin, II
Bud'ko, SL
Canfield, PC
Prozorov, R
AF Gordon, R. T.
Martin, C.
Kim, H.
Ni, N.
Tanatar, M. A.
Schmalian, J.
Mazin, I. I.
Bud'ko, S. L.
Canfield, P. C.
Prozorov, R.
TI London penetration depth in single crystals of Ba(Fe1-xCox)(2)As-2
spanning underdoped to overdoped compositions
SO PHYSICAL REVIEW B
LA English
DT Article
DE barium compounds; carrier density; cobalt compounds; doping profiles;
iron compounds; penetration depth (superconductivity)
ID SUPERCONDUCTOR
AB The London penetration depth lambda(T) has been measured in single crystals of Ba(Fe1-xCox)(2)As-2 using the tunnel diode resonator technique. The measured doping levels of x=0.038, 0.047, 0.058, 0.074, and 0.10 range from underdoped to overdoped concentrations. The measurements have shown that the density of carriers participating in superconductivity decreases sharply in the underdoped regime but the penetration depth as a function of temperature exhibits a robust power law, Delta lambda(T)similar to T-n, for all measured dopings with n being about 2 in underdoped samples and 2.5 in overdoped samples. We discuss the implications of these results and possible interpretations of such a robust behavior.
C1 [Gordon, R. T.; Martin, C.; Kim, H.; Ni, N.; Tanatar, M. A.; Schmalian, J.; Bud'ko, S. L.; Canfield, P. C.; Prozorov, R.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Mazin, I. I.] USN, Res Lab, Washington, DC 20375 USA.
[Gordon, R. T.; Martin, C.; Kim, H.; Ni, N.; Tanatar, M. A.; Schmalian, J.; Bud'ko, S. L.; Canfield, P. C.; Prozorov, R.] Iowa State Univ, Ames Lab, Code 6393, Ames, IA 50011 USA.
RP Prozorov, R (reprint author), Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
EM prozorov@ameslab.gov
RI Schmalian, Joerg/H-2313-2011; Prozorov, Ruslan/A-2487-2008; Canfield,
Paul/H-2698-2014
OI Prozorov, Ruslan/0000-0002-8088-6096;
FU Department of Energy-Basic Energy Sciences [DE-AC02-07CH11358.]; Alfred
P. Sloan Foundation
FX We thank A. A. Golubov, O.V. Dolgov, D. Parker, A. V. Chubukov, B. A.
Bernevig, and A. Carrington for useful discussions. Work at the Ames
Laboratory was supported by the Department of Energy-Basic Energy
Sciences under Contract No. DE-AC02-07CH11358. R. P. acknowledges
support from Alfred P. Sloan Foundation.
NR 25
TC 84
Z9 84
U1 0
U2 5
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 MAR
PY 2009
VL 79
IS 10
AR 100506
DI 10.1103/PhysRevB.79.100506
PG 4
WC Physics, Condensed Matter
SC Physics
GA 427GU
UT WOS:000264768600023
ER
PT J
AU Rosner, H
Schmitt, M
Kasinathan, D
Ormeci, A
Richter, J
Drechsler, SL
Johannes, MD
AF Rosner, H.
Schmitt, M.
Kasinathan, D.
Ormeci, A.
Richter, J.
Drechsler, S. -L.
Johannes, M. D.
TI Comment on "Electronic structure of spin-(1)/(2) Heisenberg
antiferromagnetic systems: Ba2Cu(PO4)(2) and Sr2Cu(PO4)(2)"
SO PHYSICAL REVIEW B
LA English
DT Editorial Material
ID BAND
AB Recently S.S. Salunke et al. [Phys. Rev. B 76, 085104 (2007)] reinvestigated the electronic and magnetic properties of the low-dimensional spin-1/2 materials Sr2Cu(PO4)(2) and Ba2Cu(PO4)(2). Based on a NMTO downfolding methodology their main result is a considerably reduced transfer term along the magnetic chains compared to an earlier study (M. D. Johannes et al., Phys. Rev. B 74, 174435 (2006)]. The discrepancy is assigned to the Nth-order muffin-tin orbital mapping procedure that is suggested to be more accurate than the tight-binding approach taken by Johannes et al. Here, we demonstrate that in contrast to the suggestion of Salunke et al., the discrepancy arises solely from the employment of the atomic-sphere approximation in the underlying band-structure calculation rather than from the mapping scheme used. By comparison of the bandwidths of Salunke et al. to those obtained using three different full-potential methods we find that the full-potential methods are all in nearly exact agreement with one another and yield an about 30% larger bandwidth compared to the results in Salunke et al.. In general, our results emphasize the need for a full-potential description especially for strongly anisotropic structures as a precondition for a subsequent accurate modeling. Furthermore, we comment on the exact diagonalization results given by Salunke et al..
C1 [Rosner, H.; Schmitt, M.; Kasinathan, D.; Ormeci, A.] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany.
[Richter, J.] Univ Magdeburg, Inst Theoret Phys, D-39016 Magdeburg, Germany.
[Drechsler, S. -L.] Leibnitz Inst Solid State & Mat Res IFW Dresden, D-01069 Dresden, Germany.
[Johannes, M. D.] USN, Res Lab, Washington, DC 20375 USA.
RP Rosner, H (reprint author), Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany.
RI Richter, Johannes/A-6339-2009; Ormeci, Alim/F-1082-2012; Kasinathan,
Deepa/M-8825-2015
OI Ormeci, Alim/0000-0001-5468-3378; Kasinathan, Deepa/0000-0002-9063-6867
NR 10
TC 8
Z9 8
U1 0
U2 2
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 MAR
PY 2009
VL 79
IS 12
AR 127101
DI 10.1103/PhysRevB.79.127101
PG 3
WC Physics, Condensed Matter
SC Physics
GA 427HB
UT WOS:000264769300126
ER
PT J
AU Abelev, BI
Aggarwal, MM
Ahammed, Z
Anderson, BD
Arkhipkin, D
Averichev, GS
Bai, Y
Balewski, J
Barannikova, O
Barnby, LS
Baudot, J
Baumgart, S
Beavis, DR
Bellwied, R
Benedosso, F
Betts, RR
Bhardwaj, S
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Biritz, B
Bland, LC
Bombara, M
Bonner, BE
Botje, M
Bouchet, J
Braidot, E
Brandin, AV
Bruna, E
Bueltmann, S
Burton, TP
Bystersky, M
Cai, XZ
Caines, H
Sanchez, MCD
Callner, J
Catu, O
Cebra, D
Cendejas, R
Cervantes, MC
Chajecki, Z
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Cheng, J
Cherney, M
Chikanian, A
Choi, KE
Christie, W
Chung, SU
Clarke, RF
Codrington, MJM
Coffin, JP
Cormier, TM
Cosentino, MR
Cramer, JG
Crawford, HJ
Das, D
Dash, S
Daugherity, M
De Silva, C
Dedovich, TG
DePhillips, M
Derevschikov, AA
de Souza, RD
Didenko, L
Djawotho, P
Dogra, SM
Dong, X
Drachenberg, JL
Draper, JE
Du, F
Dunlop, JC
Mazumdar, MRD
Edwards, WR
Efimov, LG
Elhalhuli, E
Elnimr, M
Emelianov, V
Engelage, J
Eppley, G
Erazmus, B
Estienne, M
Eun, L
Fachini, P
Fatemi, R
Fedorisin, J
Feng, A
Filip, P
Finch, E
Fine, V
Fisyak, Y
Gagliardi, CA
Gaillard, L
Gangadharan, DR
Ganti, MS
Garcia-Solis, E
Ghazikhanian, V
Ghosh, P
Gorbunov, YN
Gordon, A
Grebenyuk, O
Grosnick, D
Grube, B
Guertin, SM
Guimaraes, KSFF
Gupta, A
Gupta, N
Guryn, W
Haag, B
Hallman, TJ
Hamed, A
Harris, JW
He, W
Heinz, M
Heppelmann, S
Hippolyte, B
Hirsch, A
Hjort, E
Hoffman, AM
Hoffmann, GW
Hofman, DJ
Hollis, RS
Huang, HZ
Humanic, TJ
Igo, G
Iordanova, A
Jacobs, P
Jacobs, WW
Jakl, P
Jin, F
Jones, PG
Joseph, J
Judd, EG
Kabana, S
Kajimoto, K
Kang, K
Kapitan, J
Kaplan, M
Keane, D
Kechechyan, A
Kettler, D
Khodyrev, VY
Kiryluk, J
Kisiel, A
Klein, SR
Knospe, AG
Kocoloski, A
Koetke, DD
Kopytine, M
Kotchenda, L
Kouchpil, V
Kravtsov, P
Kravtsov, VI
Krueger, K
Krus, M
Kuhn, C
Kumar, L
Kurnadi, P
Lamont, MAC
Landgraf, JM
LaPointe, S
Lauret, J
Lebedev, A
Lednicky, R
Lee, CH
LeVine, MJ
Li, C
Li, Y
Lin, G
Lin, X
Lindenbaum, SJ
Lisa, MA
Liu, F
Liu, H
Liu, J
Liu, L
Ljubicic, T
Llope, WJ
Longacre, RS
Love, WA
Lu, Y
Ludlam, T
Lynn, D
Ma, GL
Ma, YG
Mahapatra, DP
Majka, R
Mall, OI
Mangotra, LK
Manweiler, R
Margetis, S
Markert, C
Matis, HS
Matulenko, YA
McShane, TS
Meschanin, A
Millane, J
Miller, ML
Minaev, NG
Mioduszewski, S
Mischke, A
Mitchell, J
Mohanty, B
Molnar, L
Morozov, DA
Munhoz, MG
Nandi, BK
Nattrass, C
Nayak, TK
Nelson, JM
Nepali, C
Netrakanti, PK
Ng, MJ
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Okada, H
Okorokov, V
Olson, D
Pachr, M
Page, BS
Pal, SK
Pandit, Y
Panebratsev, Y
Pawlak, T
Peitzmann, T
Perevoztchikov, V
Perkins, C
Peryt, W
Phatak, SC
Planinic, M
Pluta, J
Poljak, N
Poskanzer, AM
Potukuchi, BVKS
Prindle, D
Pruneau, C
Pruthi, NK
Putschke, J
Raniwala, R
Raniwala, S
Ray, RL
Reed, R
Ridiger, A
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Rose, A
Roy, C
Ruan, L
Russcher, MJ
Rykov, V
Sahoo, R
Sakrejda, I
Sakuma, T
Salur, S
Sandweiss, J
Sarsour, M
Schambach, J
Scharenberg, RP
Schmitz, N
Seger, J
Selyuzhenkov, I
Seyboth, P
Shabetai, A
Shahaliev, E
Shao, M
Sharma, M
Shi, SS
Shi, XH
Sichtermann, EP
Simon, F
Singaraju, RN
Skoby, MJ
Smirnov, N
Snellings, R
Sorensen, P
Sowinski, J
Spinka, HM
Srivastava, B
Stadnik, A
Stanislaus, TDS
Staszak, D
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Subba, NL
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Timoshenko, S
Tlusty, D
Tokarev, M
Tram, VN
Trattner, AL
Trentalange, S
Tribble, RE
Tsai, OD
Ulery, J
Ullrich, T
Underwood, DG
Buren, GV
van Leeuwen, M
Molen, AMV
Vanfossen, JA
Varma, R
Vasconcelos, GMS
Vasilevski, IM
Vasiliev, AN
Videbaek, F
Vigdor, SE
Viyogi, YP
Vokal, S
Voloshin, SA
Wada, M
Waggoner, WT
Wang, F
Wang, G
Wang, JS
Wang, Q
Wang, X
Wang, XL
Wang, Y
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wissink, SW
Witt, R
Wu, Y
Xu, N
Xu, QH
Xu, Y
Xu, Z
Yepes, P
Yoo, IK
Yue, Q
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, H
Zhang, S
Zhang, WM
Zhang, Y
Zhang, ZP
Zhao, Y
Zhong, C
Zhou, J
Zoulkarneev, R
Zoulkarneeva, Y
Zuo, JX
AF Abelev, B. I.
Aggarwal, M. M.
Ahammed, Z.
Anderson, B. D.
Arkhipkin, D.
Averichev, G. S.
Bai, Y.
Balewski, J.
Barannikova, O.
Barnby, L. S.
Baudot, J.
Baumgart, S.
Beavis, D. R.
Bellwied, R.
Benedosso, F.
Betts, R. R.
Bhardwaj, S.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Biritz, B.
Bland, L. C.
Bombara, M.
Bonner, B. E.
Botje, M.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bruna, E.
Bueltmann, S.
Burton, T. P.
Bystersky, M.
Cai, X. Z.
Caines, H.
Sanchez, M. Calderson de la Barca
Callner, J.
Catu, O.
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chajecki, Z.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Cheng, J.
Cherney, M.
Chikanian, A.
Choi, K. E.
Christie, W.
Chung, S. U.
Clarke, R. F.
Codrington, M. J. M.
Coffin, J. P.
Cormier, T. M.
Cosentino, M. R.
Cramer, J. G.
Crawford, H. J.
Das, D.
Dash, S.
Daugherity, M.
De Silva, C.
Dedovich, T. G.
DePhillips, M.
Derevschikov, A. A.
de Souza, R. Derradi
Didenko, L.
Djawotho, P.
Dogra, S. M.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Du, F.
Dunlop, J. C.
Mazumdar, M. R. Dutta
Edwards, W. R.
Efimov, L. G.
Elhalhuli, E.
Elnimr, M.
Emelianov, V.
Engelage, J.
Eppley, G.
Erazmus, B.
Estienne, M.
Eun, L.
Fachini, P.
Fatemi, R.
Fedorisin, J.
Feng, A.
Filip, P.
Finch, E.
Fine, V.
Fisyak, Y.
Gagliardi, C. A.
Gaillard, L.
Gangadharan, D. R.
Ganti, M. S.
Garcia-Solis, E.
Ghazikhanian, V.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Grebenyuk, O.
Grosnick, D.
Grube, B.
Guertin, S. M.
Guimaraes, K. S. F. F.
Gupta, A.
Gupta, N.
Guryn, W.
Haag, B.
Hallman, T. J.
Hamed, A.
Harris, J. W.
He, W.
Heinz, M.
Heppelmann, S.
Hippolyte, B.
Hirsch, A.
Hjort, E.
Hoffman, A. M.
Hoffmann, G. W.
Hofman, D. J.
Hollis, R. S.
Huang, H. Z.
Humanic, T. J.
Igo, G.
Iordanova, A.
Jacobs, P.
Jacobs, W. W.
Jakl, P.
Jin, F.
Jones, P. G.
Joseph, J.
Judd, E. G.
Kabana, S.
Kajimoto, K.
Kang, K.
Kapitan, J.
Kaplan, M.
Keane, D.
Kechechyan, A.
Kettler, D.
Khodyrev, V. Yu.
Kiryluk, J.
Kisiel, A.
Klein, S. R.
Knospe, A. G.
Kocoloski, A.
Koetke, D. D.
Kopytine, M.
Kotchenda, L.
Kouchpil, V.
Kravtsov, P.
Kravtsov, V. I.
Krueger, K.
Krus, M.
Kuhn, C.
Kumar, L.
Kurnadi, P.
Lamont, M. A. C.
Landgraf, J. M.
LaPointe, S.
Lauret, J.
Lebedev, A.
Lednicky, R.
Lee, C. -H.
LeVine, M. J.
Li, C.
Li, Y.
Lin, G.
Lin, X.
Lindenbaum, S. J.
Lisa, M. A.
Liu, F.
Liu, H.
Liu, J.
Liu, L.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Love, W. A.
Lu, Y.
Ludlam, T.
Lynn, D.
Ma, G. L.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mall, O. I.
Mangotra, L. K.
Manweiler, R.
Margetis, S.
Markert, C.
Matis, H. S.
Matulenko, Yu. A.
McShane, T. S.
Meschanin, A.
Millane, J.
Miller, M. L.
Minaev, N. G.
Mioduszewski, S.
Mischke, A.
Mitchell, J.
Mohanty, B.
Molnar, L.
Morozov, D. A.
Munhoz, M. G.
Nandi, B. K.
Nattrass, C.
Nayak, T. K.
Nelson, J. M.
Nepali, C.
Netrakanti, P. K.
Ng, M. J.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Okada, H.
Okorokov, V.
Olson, D.
Pachr, M.
Page, B. S.
Pal, S. K.
Pandit, Y.
Panebratsev, Y.
Pawlak, T.
Peitzmann, T.
Perevoztchikov, V.
Perkins, C.
Peryt, W.
Phatak, S. C.
Planinic, M.
Pluta, J.
Poljak, N.
Poskanzer, A. M.
Potukuchi, B. V. K. S.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Putschke, J.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Reed, R.
Ridiger, A.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Rose, A.
Roy, C.
Ruan, L.
Russcher, M. J.
Rykov, V.
Sahoo, R.
Sakrejda, I.
Sakuma, T.
Salur, S.
Sandweiss, J.
Sarsour, M.
Schambach, J.
Scharenberg, R. P.
Schmitz, N.
Seger, J.
Selyuzhenkov, I.
Seyboth, P.
Shabetai, A.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, S. S.
Shi, X. -H.
Sichtermann, E. P.
Simon, F.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Snellings, R.
Sorensen, P.
Sowinski, J.
Spinka, H. M.
Srivastava, B.
Stadnik, A.
Stanislaus, T. D. S.
Staszak, D.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Subba, N. L.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Symons, T. J. M.
de Toledo, A. Szanto
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Timoshenko, S.
Tlusty, D.
Tokarev, M.
Tram, V. N.
Trattner, A. L.
Trentalange, S.
Tribble, R. E.
Tsai, O. D.
Ulery, J.
Ullrich, T.
Underwood, D. G.
Buren, G. Van
van Leeuwen, M.
Molen, A. M. Vander
Vanfossen, J. A., Jr.
Varma, R.
Vasconcelos, G. M. S.
Vasilevski, I. M.
Vasiliev, A. N.
Videbaek, F.
Vigdor, S. E.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Waggoner, W. T.
Wang, F.
Wang, G.
Wang, J. S.
Wang, Q.
Wang, X.
Wang, X. L.
Wang, Y.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Wu, Y.
Xu, N.
Xu, Q. H.
Xu, Y.
Xu, Z.
Yepes, P.
Yoo, I. -K.
Yue, Q.
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, H.
Zhang, S.
Zhang, W. M.
Zhang, Y.
Zhang, Z. P.
Zhao, Y.
Zhong, C.
Zhou, J.
Zoulkarneev, R.
Zoulkarneeva, Y.
Zuo, J. X.
CA STAR Collaboration
TI Systematic measurements of identified particle spectra in pp, d plus Au,
and Au plus Au collisions at the STAR detector
SO PHYSICAL REVIEW C
LA English
DT Review
ID HEAVY-ION COLLISIONS; QUARK-GLUON-PLASMA; NUCLEUS-NUCLEUS COLLISIONS;
TIME PROJECTION CHAMBER; IMPACT PARAMETER REPRESENTATION;
PROTON-ANTIPROTON COLLISIONS; TRANSVERSE-MOMENTUM SPECTRA; RESISTIVE
PLATE CHAMBERS; HIGH-DENSITY QCD; AU+AU COLLISIONS
AB Identified charged-particle spectra of pi(+/-), K-+/-, p, and (p) over bar at midrapidity (vertical bar y vertical bar < 0.1) measured by the dE/dx method in the STAR (solenoidal tracker at the BNL Relativistic Heavy Ion Collider) time projection chamber are reported for pp and d + Au collisions at root s(NN) = 200 GeV and for Au + Au collisions at 62.4, 130, and 200 GeV. Average transverse momenta, total particle production, particle yield ratios, strangeness, and baryon production rates are investigated as a function of the collision system and centrality. The transverse momentum spectra are found to be flatter for heavy particles than for light particles in all collision systems; the effect is more prominent for more central collisions. The extracted average transverse momentum of each particle species follows a trend determined by the total charged-particle multiplicity density. The Bjorken energy density estimate is at least several GeV/fm(3) for a formation time less than 1 fm/c. A significantly larger net-baryon density and a stronger increase of the net-baryon density with centrality are found in Au + Au collisions at 62.4 GeV than at the two higher energies. Antibaryon production relative to total particle multiplicity is found to be constant over centrality, but increases with the collision energy. Strangeness production relative to total particle multiplicity is similar at the three measured RHIC energies. Relative strangeness production increases quickly with centrality in peripheral Au + Au collisions, to a value about 50% above the pp value, and remains rather constant in more central collisions. Bulk freeze-out properties are extracted from thermal equilibrium model and hydrodynamics-motivated blast-wave model fits to the data. Resonance decays are found to have little effect on the extracted kinetic freeze-out parameters because of the transverse momentum range of our measurements. The extracted chemical freeze-out temperature is constant, independent of collision system or centrality; its value is close to the predicted phase-transition temperature, suggesting that chemical freeze-out happens in the vicinity of hadronization and the chemical freeze-out temperature is universal despite the vastly different initial conditions in the collision systems. The extracted kinetic freeze-out temperature, while similar to the chemical freeze-out temperature in pp, d + Au, and peripheral Au + Au collisions, drops significantly with centrality in Au + Au collisions, whereas the extracted transverse radial flow velocity increases rapidly with centrality. There appears to be a prolonged period of particle elastic scatterings from chemical to kinetic freeze-out in central Au + Au collisions. The bulk properties extracted at chemical and kinetic freeze-out are observed to evolve smoothly over the measured energy range, collision systems, and collision centralities.
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[Krueger, K.; Spinka, H. M.; Underwood, D. G.] Argonne Natl Lab, Argonne, IL 60439 USA.
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RP Abelev, BI (reprint author), Univ Illinois, Chicago, IL 60607 USA.
RI Lee, Chang-Hwan/B-3096-2015; Dogra, Sunil /B-5330-2013; Fornazier
Guimaraes, Karin Silvia/H-4587-2016; Chaloupka, Petr/E-5965-2012;
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Suaide, Alexandre/L-6239-2016; Inst. of Physics, Gleb
Wataghin/A-9780-2017; Okorokov, Vitaly/C-4800-2017; Ma,
Yu-Gang/M-8122-2013; Sumbera, Michal/O-7497-2014; Strikhanov,
Mikhail/P-7393-2014; Barnby, Lee/G-2135-2010; Mischke,
Andre/D-3614-2011; Takahashi, Jun/B-2946-2012; Planinic,
Mirko/E-8085-2012; Yoo, In-Kwon/J-6222-2012; Peitzmann,
Thomas/K-2206-2012; Witt, Richard/H-3560-2012; Voloshin,
Sergei/I-4122-2013; Pandit, Yadav/I-2170-2013; Lednicky,
Richard/K-4164-2013; Cosentino, Mauro/L-2418-2014
OI Bhasin, Anju/0000-0002-3687-8179; van Leeuwen,
Marco/0000-0002-5222-4888; Lee, Chang-Hwan/0000-0003-3221-1171;
Fornazier Guimaraes, Karin Silvia/0000-0003-0578-9533; Nattrass,
Christine/0000-0002-8768-6468; Derradi de Souza,
Rafael/0000-0002-2084-7001; Suaide, Alexandre/0000-0003-2847-6556;
Okorokov, Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900;
Sumbera, Michal/0000-0002-0639-7323; Strikhanov,
Mikhail/0000-0003-2586-0405; Barnby, Lee/0000-0001-7357-9904; Takahashi,
Jun/0000-0002-4091-1779; Peitzmann, Thomas/0000-0002-7116-899X; Pandit,
Yadav/0000-0003-2809-7943; Cosentino, Mauro/0000-0002-7880-8611
NR 171
TC 380
Z9 386
U1 3
U2 63
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2009
VL 79
IS 3
AR 034909
DI 10.1103/PhysRevC.79.034909
PG 58
WC Physics, Nuclear
SC Physics
GA 427FV
UT WOS:000264766100047
ER
PT J
AU Tejero, EM
Gatling, G
AF Tejero, E. M.
Gatling, G.
TI Linear decomposition method for approximating arbitrary magnetic field
profiles by optimization of discrete electromagnet currents
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
DE electromagnets; magnetic field measurement; solenoids
ID DESIGN
AB A method for approximating arbitrary axial magnetic field profiles for a given solenoidal electromagnet coil array is described. The method casts the individual contributions from each coil as a truncated orthonormal basis for the space within the array. This truncated basis allows for the linear decomposition of an arbitrary profile function, which returns the appropriate currents for each coil to best reproduce the desired profile. We present the mathematical details of the method along with a detailed example of its use. The results from the method are used in a simulation and compared with magnetic field measurements.
C1 [Tejero, E. M.] Global Strategies Grp N Amer Inc, Crofton, MD 21114 USA.
[Tejero, E. M.] Auburn Univ, Dept Phys, Auburn, AL 36849 USA.
[Gatling, G.] USN, Res Lab, Washington, DC 20375 USA.
RP Tejero, EM (reprint author), Global Strategies Grp N Amer Inc, Crofton, MD 21114 USA.
EM erik.tejero.ctr@nrl.navy.mil
FU Office of Naval Research
FX The authors would like to thank Dr. Bill Amatucci for helpful
discussions. This work is supported by the Office of Naval Research.
NR 14
TC 3
Z9 3
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD MAR
PY 2009
VL 80
IS 3
AR 035104
DI 10.1063/1.3093799
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 427JW
UT WOS:000264776600049
PM 19334949
ER
PT J
AU Florinski, V
Balogh, A
Jokipii, JR
McComas, DJ
Opher, M
Pogorelov, NV
Richardson, JD
Stone, EC
Wood, BE
AF Florinski, V.
Balogh, A.
Jokipii, J. R.
McComas, D. J.
Opher, M.
Pogorelov, N. V.
Richardson, J. D.
Stone, E. C.
Wood, B. E.
TI The Dynamic Heliosphere: Outstanding Issues
SO SPACE SCIENCE REVIEWS
LA English
DT Review
DE Solar Wind; Termination shock; Heliosheath; Heliopause; Pickup ions;
Interstellar neutral atoms; Anomalous cosmic rays
ID SOLAR-WIND TERMINATION; LOCAL INTERSTELLAR-MEDIUM; ANOMALOUS
COSMIC-RAYS; INTERPLANETARY MAGNETIC-FIELDS; ENERGETIC NEUTRAL ATOMS;
BOUNDARY EXPLORER IBEX; PLASMA DEPLETION LAYER; OUTER HELIOSPHERE; BOW
SHOCK; 3-DIMENSIONAL FEATURES
AB Properties of the heliospheric interface, a complex product of an interaction between charged and neutral particles and magnetic fields in the heliosphere and surrounding Circumheliospheric Medium, are far from being fully understood. Recent Voyager spacecraft encounters with the termination shock and their observations in the heliosheath revealed multiple energetic particle populations and noticeable spatial asymmetries not accounted for by the classic theories. Some of the challenges still facing space physicists include the origin of anomalous cosmic rays, particle acceleration downstream of the termination shock, the role of interstellar magnetic fields in producing the global asymmetry of the interface, the influence of charge exchange and interstellar neutral atoms on heliospheric plasma flows, and the signatures of solar magnetic cycle in the heliosheath. These and other outstanding issues are reviewed in this joint report of working groups 4 and 6.
C1 [Florinski, V.; Pogorelov, N. V.] Univ Alabama, Dept Phys, Huntsville, AL 35806 USA.
[Florinski, V.; Pogorelov, N. V.] Univ Alabama, Ctr Space Plasma & Aeronom Res, Huntsville, AL 35806 USA.
[Balogh, A.] Int Space Sci Inst, CH-3012 Bern, Switzerland.
[Jokipii, J. R.] Univ Arizona, Dept Planetary Sci, Tucson, AZ 85721 USA.
[Jokipii, J. R.] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA.
[McComas, D. J.] SW Res Inst, San Antonio, TX 78238 USA.
[Opher, M.] George Mason Univ, Dept Phys & Astron, Fairfax, VA 22030 USA.
[Pogorelov, N. V.] Univ Alabama, Dept Phys, Huntsville, AL 35806 USA.
[Richardson, J. D.] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.
[Stone, E. C.] CALTECH, Space Radiat Lab, Pasadena, CA 91125 USA.
[Wood, B. E.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Florinski, V (reprint author), Univ Alabama, Dept Phys, 301 Sparkman Dr, Huntsville, AL 35806 USA.
EM vaf0001@uah.edu; balogh@issibern.ch; jokipii@lpl.arizona.edu;
dmccomas@swri.edu; mopher@physics.gmu.edu; np0002@uah.edu;
jdr@space.mit.edu; ecs@srl.caltech.edu; brian.wood@nrl.navy.mil
NR 107
TC 11
Z9 11
U1 1
U2 2
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-6308
EI 1572-9672
J9 SPACE SCI REV
JI Space Sci. Rev.
PD MAR
PY 2009
VL 143
IS 1-4
BP 57
EP 83
DI 10.1007/s11214-009-9488-7
PG 27
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 413NH
UT WOS:000263799300007
ER
PT J
AU Holt, T
Pullen, J
Bishop, CH
AF Holt, Teddy
Pullen, Julie
Bishop, Craig H.
TI Urban and ocean ensembles for improved meteorological and dispersion
modelling of the coastal zone
SO TELLUS SERIES A-DYNAMIC METEOROLOGY AND OCEANOGRAPHY
LA English
DT Article
ID SEA-BREEZE FRONT; HEAT-ISLAND; METROPOLITAN-AREA; SINGLE-LAYER; TOKYO;
SIMULATION; MESOSCALE; SYSTEM; PARAMETERIZATION; UNCERTAINTIES
AB A high-resolution (1.67 km) ensemble transform (ET)-based meso-scale modelling system utilizing urbanization and sea surface temperature (SST) perturbations is used to examine characteristics of sea breeze/heat island interactions and atmospheric transport and dispersion for Tokyo. The ensemble displays a positive spread-skill relationship, with the addition of urban perturbations enabling the ensemble variance to distinguish a larger range of forecast error variances. Two synoptic regimes are simulated. For a pre-frontal period (stronger synoptic flow), there is less variability among ensemble members in the strength of the urban heat island and its interaction with the sea breeze front. During the post-frontal time period, the sea breeze frontal position is very sensitive to the details of the urban representation, with horizontal frontal variation covering the width of the urban centre (similar to 30 km) and displaying significant impacts on the development and strength of the heat island. Moreover, the dosage values of a tracer released at offshore and urban sites have considerable variability among ensemble members in response to small-scale features such as coastally upwelled water, enhanced anthropogenic heating and variations in building heights. Realistic variations in SST (i.e. warm Tokyo Bay or local upwelling) produce subtle sea breeze variations that dramatically impact tracer distributions.
C1 [Holt, Teddy; Pullen, Julie; Bishop, Craig H.] USN, Res Lab, Monterey, CA USA.
RP Holt, T (reprint author), USN, Res Lab, Monterey, CA USA.
EM teddy.holt@nrlmry.navy.mil
FU Navy's Program Executive Office for C4I; Battlespace Awareness and
Information Operations Program Office [PMW 120]; CAPT Robert Parker
[0603207N]
FX We extend our thanks to Paul May for executing the ocean model
simulations. The research was supported by the Navy's Program Executive
Office for C4I, Battlespace Awareness and Information Operations Program
Office (PMW 120), CAPT Robert Parker under Program Element 0603207N.
NR 40
TC 13
Z9 13
U1 1
U2 4
PU CO-ACTION PUBLISHING
PI JARFALLA
PA RIPVAGEN 7, JARFALLA, SE-175 64, SWEDEN
SN 0280-6495
J9 TELLUS A
JI Tellus Ser. A-Dyn. Meteorol. Oceanol.
PD MAR
PY 2009
VL 61
IS 2
BP 232
EP 249
DI 10.1111/j.1600-0870.2008.00377.x
PG 18
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 405XU
UT WOS:000263258300005
ER
PT J
AU Lavin, MF
Castro, R
Beier, E
Godinez, VM
Amador, A
Guest, P
AF Lavin, M. F.
Castro, Ruben
Beier, Emilio
Godinez, Victor M.
Amador, Alberto
Guest, P.
TI SST, thermohaline structure, and circulation in the southern Gulf of
California in June 2004 during the North American Monsoon Experiment
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID EASTERN TROPICAL PACIFIC; SEASONAL HEAT-BALANCE; WATER MASSES;
VARIABILITY; OCEAN; TEMPERATURE; SALINITY; MOUTH; ENTRANCE; DYNAMICS
AB The thermohaline structure, circulation, and heat fluxes in the Gulf of California entrance during June 2004 are described based on conductivity-temperature-depth and Lowering Acoustic Doppler Current Profiler data collected in a 14-day survey, supported by satellite data. The AVHRR images show extensive mesoscale structures in the region, the most striking being (1) a cool filament extending from the California Current domain and (2) a warm intrusion along the mainland shelf. On the warm side of the thermal front created by the cool filament there was a strong current flowing into the Gulf, with speeds up to 0.70 ms(-1) in the surface; this current, which the SST images suggest was associated with a decaying eddy, carried 6 Sv into the Gulf. Associated with the second structure, there was an ingoing coastal current on the mainland shelf, with weak surface currents but with speeds similar to 0.25 ms(-1) at its core, between 70 and 200 m; this coastal current transported 2 Sv into the Gulf. The two ingoing currents appear to join inside the Gulf, forming a very strong (speeds 0.40-0.80 ms(-1)) narrow (similar to 30 km) coastal current between the surface and 500 m depth. Changes in the thermohaline structure of the upper layers observed by repeat sampling of three cross sections were dominated by advection. However, it was found that the advective heat flux is very variable in space and time. For the period of observation it was estimated that the lateral heat input was 4.8 +/- 3.0 x 10(5) Wm(-2) as estimated with LADCP currents and 5.7 +/- 2.20 x 10(5) Wm(-2) with geostrophic velocities.
C1 [Lavin, M. F.; Godinez, Victor M.; Amador, Alberto] CICESE, Dept Oceanog Fis, Ensenada 22860, Baja California, Mexico.
[Beier, Emilio] CICESE, Estac La Paz, La Paz 23050, Mexico.
[Castro, Ruben] Univ Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22800, Baja California, Mexico.
[Guest, P.] USN, Postgrad Sch, Dept Meteorol, Monterey, CA 93943 USA.
RP Lavin, MF (reprint author), CICESE, Dept Oceanog Fis, Ensenada 22860, Baja California, Mexico.
EM mlavin@cicese.mx
RI Godinez, Victor M./E-1519-2015
OI Godinez, Victor M./0000-0002-6141-2012
FU NOAA [GC04-219]; CONACyT (Mexico) [D41881-F, C01-25343]; UABC [P-0324,
P-0352]; CICESE
FX This is a product of project "The Role of Oceanic Processes on the Gulf
of California SST Evolution during the North American Monsoon
Experiment,'' which is part of the North American Monsoon Experiment
(NOAA contract GC04-219, P. I. Michael Douglas). This work was also
supported by CONACyT (Mexico) projects D41881-F (P. I., MFL) and
C01-25343 (P. I., RC), by UABC projects (P-0324 and P-0352) and by
CICESE. VMG held a CONACYT scholarship. MFL was at SIO-UCSD as recipient
of a UCMEXUS-CONACYT sabbatical scholarship, hosted by P. Niiler, while
working on this article. Thanks to Mayra Pazos and the Drifter Data
Assembly Center (GDP/NOAA) for handling drifter data. Technical support
by C. Cabrera, R. Camacho, J. Garcia, and C. Flores. We thank the
support of the skipper and crew of the B/O Francisco de Ulloa.
NR 54
TC 17
Z9 17
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9275
EI 2169-9291
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD FEB 28
PY 2009
VL 114
AR C02025
DI 10.1029/2008JC004896
PG 22
WC Oceanography
SC Oceanography
GA 412PI
UT WOS:000263736300001
ER
PT J
AU Arbic, BK
Shriver, JF
Hogan, PJ
Hurlburt, HE
McClean, JL
Metzger, EJ
Scott, RB
Sen, A
Smedstad, OM
Wallcraft, AJ
AF Arbic, Brian K.
Shriver, Jay F.
Hogan, Patrick J.
Hurlburt, Harley E.
McClean, Julie L.
Metzger, E. Joseph
Scott, Robert B.
Sen, Ayon
Smedstad, Ole Martin
Wallcraft, Alan J.
TI Estimates of bottom flows and bottom boundary layer dissipation of the
oceanic general circulation from global high-resolution models
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID LIMITED-AREA MODEL; GULF-STREAM; GEOSTROPHIC TURBULENCE; 1/64-DEGREES
RESOLUTION; TIDAL DISSIPATION; ENERGY-BALANCE; ATLANTIC-OCEAN;
NORTH-ATLANTIC; KINETIC-ENERGY; ALTIMETER DATA
AB This paper (1) compares the bottom flows of three existing high-resolution global simulations of the oceanic general circulation to near-bottom flows in a current meter database and (2) estimates, from the simulations, the global energy dissipation rate of the general circulation by quadratic bottom boundary layer drag. The study utilizes a data-assimilative run of the Naval Research Laboratory Layered Ocean Model (NLOM), a nonassimilative run of NLOM, and a nonassimilative run of the Parallel Ocean Program z-level ocean model. Generally speaking, the simulations have some difficulty matching the flows in individual current meter records. However, averages of model values of |u(b)|(3) (the time average of the cube of bottom velocity, which is proportional to the dissipation rate) computed over all the current meter sites agree to within a factor of 2.7 or better with averages computed from the current meters, at least in certain depth ranges. The models therefore likely provide reasonable order-of-magnitude estimates of areally integrated dissipation by bottom drag. Global dissipation rates range from 0.14 to 0.65 TW, suggesting that bottom drag represents a substantial sink of the similar to 1 TW wind-power transformed into geostrophic motions.
C1 [Arbic, Brian K.; Scott, Robert B.; Sen, Ayon] Univ Texas Austin, Inst Geophys, Jackson Sch Geosci, Austin, TX 78758 USA.
[Shriver, Jay F.; Hogan, Patrick J.; Hurlburt, Harley E.; Metzger, E. Joseph; Wallcraft, Alan J.] USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
[McClean, Julie L.] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
[Sen, Ayon] Westwood High Sch, Austin, TX USA.
[Smedstad, Ole Martin] Planning Syst Inc, Stennis Space Ctr, MS 39529 USA.
RP Arbic, BK (reprint author), Univ Texas Austin, Inst Geophys, Jackson Sch Geosci, Austin, TX 78758 USA.
EM barbic@fsu.edu
RI Scott, Robert/B-9876-2008
FU Naval Research Laboratory (NRL) [N000173-06-2-C003]; National Science
Foundation (NSF) [OCE-0623159]; NSF [OCE-0526412]; Office of Naval
Research and Office of Science (BER); U. S. Department of Energy
[DE-FG02-05ER64119]
FX This paper was originally submitted in much shorter form to a different
journal. The comments of the reviewers of that paper (Steve Jayne and an
anonymous reviewer) convinced us that a more comprehensive paper was in
order. The same two reviewers were then asked to review the present
paper and continued to provide guidance that led to important
improvements. We thank both reviewers for their very substantial
contributions to the presentation of this work. Jim Richman and Georges
Weatherly are also thanked for useful discussions. B. K. A. acknowledges
support from Naval Research Laboratory (NRL) contract N000173-06-2-C003
and National Science Foundation (NSF) grant OCE-0623159. R. B. S.
acknowledges support from NSF grant OCE-0526412. The NRL coauthors
acknowledge support from the 6.1 project "Global remote littoral forcing
via deep water pathways'', sponsored by the Office of Naval Research
under program element 601153N. J. L. M. acknowledges support from the
Office of Naval Research and Office of Science (BER), U. S. Department
of Energy, under grant DE-FG02-05ER64119. J. L. M. also acknowledges
high-performance computing resources at the Naval Oceanographic Office
and the Maui High Performance Computing Center (MHPCC) as part of a DOD
High-Performance Computing Grand Challenge grant.
NR 59
TC 26
Z9 27
U1 0
U2 11
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9275
EI 2169-9291
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD FEB 27
PY 2009
VL 114
AR C02024
DI 10.1029/2008JC005072
PG 17
WC Oceanography
SC Oceanography
GA 412PH
UT WOS:000263736200004
ER
PT J
AU Kara, AB
Barron, CN
Boyer, TP
AF Kara, A. B.
Barron, C. N.
Boyer, T. P.
TI Evaluations of SST climatologies in the tropical Pacific Ocean
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID SEA-SURFACE TEMPERATURE; DECADAL VARIABILITY; NORTH PACIFIC; ANNUAL
CYCLE; PERFORMANCE; SATELLITE; CLIMATE; SYSTEM; LAYER; SITU
AB Accuracies of a total of six sea surface temperature (SST) climatologies are investigated in the tropical Pacific Ocean, spanning latitudes from 30 degrees N to 30 degrees S. Observation-based climatologies are directly obtained from their original sources and typically formed from satellite measurements, in situ data, or a combination of both. Other SST climatologies are constructed from reanalyses of a numerical weather prediction center. All products have different features, each with its own data sources, grid resolutions, interpolation methods, sampling periods, and biases. Even though time periods during which climatologies were formed differ, all products have good agreement with each other, with basin-averaged mean bias values of almost zero and RMS SST differences typically < 0.3 degrees C over the annual cycle. Nondimensional skill scores between the pairs of SST products are close to 1, indicating almost perfect agreement everywhere except in the western equatorial Pacific. Comparisons against an ensemble climatology based on the average of all SST climatologies further reveal the weaknesses and strengths of each product. Additional validations are performed by forming climatologies using SSTs from moored buoys of the Tropical Atmosphere Ocean (TAO) array during 1986-2005. Overall, very small cold biases of approximate to 0.2 degrees C and near-perfect skill scores are found for all SST climatologies when comparing them with 408-month-long SST time series from 34 buoys. In general, all SST products are generally accurate enough to be used for various climate applications.
C1 [Kara, A. B.; Barron, C. N.] USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
[Boyer, T. P.] NOAA Natl Oceanog Data Ctr, Silver Spring, MD 20910 USA.
RP Kara, AB (reprint author), USN, Res Lab, Div Oceanog, Code 7320,Bldg 1009, Stennis Space Ctr, MS 39529 USA.
EM birol.kara@nrlssc.navy.mil
RI Barron, Charlie/C-1451-2008
FU Multisensor Improved Sea Surface Temperature (MISST); Global Ocean Data
Assimilation Experiment (GODAE); NRL/JA/7320/08/8257
FX We acknowledge J. Metzger of NRL for his help in archiving SST products.
Numerous discussions with A. Wallcraft of NRL and Wei-Yin Loh of
Department of Statistics, University of Wisconsin, are acknowledged. The
TAO project office is thanked for providing daily buoy SSTs used for
evaluations of climatological products. Additional thanks go to the
reviewers for their thoughtful and constructive suggestions. This
research is funded by Multisensor Improved Sea Surface Temperature
(MISST) for Global Ocean Data Assimilation Experiment (GODAE) project.
This paper is contribution NRL/JA/7320/08/8257 and has been approved for
public release.
NR 23
TC 2
Z9 2
U1 0
U2 3
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD FEB 27
PY 2009
VL 114
AR C02021
DI 10.1029/2008JC004909
PG 16
WC Oceanography
SC Oceanography
GA 412PH
UT WOS:000263736200002
ER
PT J
AU Kim, BJ
Jung, H
Shin, J
Mastro, MA
Eddy, CR
Hite, JK
Kim, SH
Bang, J
Kim, J
AF Kim, B. J.
Jung, H.
Shin, J.
Mastro, M. A.
Eddy, C. R., Jr.
Hite, J. K.
Kim, S. H.
Bang, J.
Kim, J.
TI Enhancement of light extraction efficiency of ultraviolet light emitting
diodes by patterning of SiO2 nanosphere arrays
SO THIN SOLID FILMS
LA English
DT Article
DE Light emitting diode; Light extraction efficiency; Nanosphere arrays
ID GAN; GROWTH
AB Here we introduce a simple and robust method to improve the light extraction efficiency of ultraviolet light emitting diodes (UV LEDs). Although many previous efforts have focused on etching the GaN surfaces, we employed a simple solution process to texture the GaN surface. Arrays of SiO2 nanosphere monolayers were spun cast onto a polymer layer. consisting of benzocyclobutene (BCB) resins: subsequently, the bottom half of the SiO2 nanospheres sunk into the BCB layer. The resulting array formed in a hexagonal-like pattern of 'nano-lenses' and the photoluminescence measurement exhibited that these patterns enhanced the light extracting efficiency of UV LEDs by 23%. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Kim, B. J.; Jung, H.; Kim, S. H.; Bang, J.; Kim, J.] Korea Univ, Dept Biol & Chem Engn, Seoul 136701, South Korea.
[Shin, J.] Univ Calif Santa Barbara, Dept Elect Engn, Santa Barbara, CA 93106 USA.
[Mastro, M. A.; Eddy, C. R., Jr.; Hite, J. K.] USN, Res Lab, Washington, DC 20375 USA.
RP Bang, J (reprint author), Korea Univ, Dept Biol & Chem Engn, Seoul 136701, South Korea.
EM joona@korea.ac.kr; hyunhyun7@korea.ac.kr
RI Bang, Joona/F-6589-2013; Kim, Jihyun/F-6940-2013; Kim, Sung
Hyun/F-7292-2013; Hite, Jennifer/L-5637-2015
OI Hite, Jennifer/0000-0002-4090-0826
FU Carbon Dioxide Reduction and Sequestration Center; Ministry of
Education, Science and Technology of Korea; ONR
FX The research at Korea University was supported by the Carbon Dioxide
Reduction and Sequestration Center, one of the 21st Century Frontier R&D
Program funded by the Ministry of Education, Science and Technology of
Korea. The research at NRL was supported by ONR.
NR 14
TC 15
Z9 17
U1 0
U2 17
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD FEB 27
PY 2009
VL 517
IS 8
BP 2742
EP 2744
DI 10.1016/j.tsf.2008.11.067
PG 3
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 415IK
UT WOS:000263927300032
ER
PT J
AU Bucholtz, F
Villarruel, CA
Knapp, PF
Shue, J
Andreadis, TD
Schermer, RT
Gil, JG
Williams, KJ
AF Bucholtz, F.
Villarruel, C. A.
Knapp, P. F.
Shue, J.
Andreadis, T. D.
Schermer, R. T.
Gil, J. Gil
Williams, K. J.
TI Susceptibility of lithium-niobate modulator to high-power microwave
pulses
SO ELECTRONICS LETTERS
LA English
DT Article
AB The. first measurement of the susceptibility of an off-the-shelf lithiumniobate intensity modulator to damage and disruption from high-power microwave pulses is reported. The device tested survived 1 kHz repetition rate pulses at 2.5 GHz centre frequency and 40 mu s width up to 200 W peak power. The results are discussed in terms of material parameters and device characteristics.
C1 [Bucholtz, F.; Villarruel, C. A.; Williams, K. J.] Naval Res Lab, Div Opt Sci, Washington, DC USA.
[Knapp, P. F.] SFA Inc, Dept Elect & Comp Engn, Crofton, MD USA.
[Schermer, R. T.] Global Strategies Grp Inc, Crofton, MD USA.
[Shue, J.; Andreadis, T. D.; Gil, J. Gil] Naval Res Lab, Tact Elect Warfare Div, Washington, DC USA.
RP Bucholtz, F (reprint author), Naval Res Lab, Div Opt Sci, Washington, DC USA.
EM frank.bucholtz@nrl.navy.mil
NR 6
TC 1
Z9 1
U1 0
U2 3
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 0013-5194
EI 1350-911X
J9 ELECTRON LETT
JI Electron. Lett.
PD FEB 26
PY 2009
VL 45
IS 5
BP 272
EP U50
DI 10.1049/el:20090009
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA 413IA
UT WOS:000263785600022
ER
PT J
AU Spudis, P
Nozette, S
Bussey, B
Raney, K
Winters, H
Lichtenberg, CL
Marinelli, W
Crusan, JC
Gates, MM
AF Spudis, Paul
Nozette, Stewart
Bussey, Ben
Raney, Keith
Winters, Helene
Lichtenberg, Christopher L.
Marinelli, William
Crusan, Jason C.
Gates, Michele M.
TI Mini-SAR: an imaging radar experiment for the Chandrayaan-1 mission to
the Moon
SO CURRENT SCIENCE
LA English
DT Article
DE Ice; Moon; poles; radar; SAR
ID LUNAR SOUTH-POLE; ICE; DEPOSITS
AB Mini-SAR is a single frequency (S-band; 13-cm wave-length) Synthetic Aperture Radar (SAR) in a lightweight (similar to 9 kg) package. Previous Earth- and space-based radar observations of the permanently shadowed regions of the lunar poles have measured areas of high circular polarization ratio consistent with volume scattering from water ice buried at shallow (0.1-1 m) depths. This detection is not definitive because of poor viewing geometry and a limited number of observations. Mini-SAR utilizes a unique hybrid polarization architecture, which allows determination of the Stokes parameters of the reflected signal, intended to distinguish volume scattering (caused by the presence of ice) from other scattering mechanisms (e. g. sub-wavelength scale surface roughness).
C1 [Spudis, Paul; Nozette, Stewart] Lunar & Planetary Inst, Houston, TX 77058 USA.
[Bussey, Ben; Raney, Keith; Winters, Helene] Appl Phys Lab, Laurel, MD 20723 USA.
[Lichtenberg, Christopher L.] USN, Air Warfare Ctr, China Lake, CA 93555 USA.
[Marinelli, William; Crusan, Jason C.; Gates, Michele M.] NASA, Washington, DC 20546 USA.
RP Spudis, P (reprint author), Lunar & Planetary Inst, 3600 Bay Area Blvd, Houston, TX 77058 USA.
EM spudis@lpi.usra.edu
FU Lunar and Planetary Institute Contribution [1444]
FX We thank NASA's Spaceflight Operations Mission Directorate and the
Exploration Systems Mission Directorate, and the Department of Defense
for supporting the Mini-SAR project. This paper is Lunar and Planetary
Institute Contribution Number 1444.
NR 14
TC 19
Z9 23
U1 0
U2 5
PU INDIAN ACAD SCIENCES
PI BANGALORE
PA C V RAMAN AVENUE, SADASHIVANAGAR, P B #8005, BANGALORE 560 080, INDIA
SN 0011-3891
J9 CURR SCI INDIA
JI Curr. Sci.
PD FEB 25
PY 2009
VL 96
IS 4
BP 533
EP 539
PG 7
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 416PS
UT WOS:000264018600034
ER
PT J
AU Robinson, JT
Rastelli, A
Schmidt, O
Dubon, OD
AF Robinson, Jeremy T.
Rastelli, Armando
Schmidt, Oliver
Dubon, Oscar D.
TI Global faceting behavior of strained Ge islands on Si
SO NANOTECHNOLOGY
LA English
DT Article
ID MOLECULAR-BEAM EPITAXY; INAS QUANTUM DOTS; 001 SURFACE; SI(001); GROWTH;
TRANSITION; PYRAMIDS; SHAPE; NANOCRYSTALS; EQUILIBRIUM
AB The evolution of crystallographic facets of strained heteroepitaxial Ge islands on Si is investigated. Islands growing on Si(001), (111), (110) and (113) are bound by an equilibrium set of facets that includes only shared stable surfaces between bulk Si and Ge -{105}, {113}, {15 3 23} and {111}. The formation of a stereographic map from these indices facilitates the prediction of Ge faceted-island shapes on any Si substrate at different stages of growth. The analysis presented here can be applied to other heteroepitaxial islanding systems where a finite set of shared equilibrium facets exists for the bulk starting materials.
C1 [Robinson, Jeremy T.] USN, Res Lab, Washington, DC 20375 USA.
[Rastelli, Armando; Schmidt, Oliver] IFW Dresden, Inst Integrat Nanosci, D-01069 Dresden, Germany.
[Dubon, Oscar D.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Dubon, Oscar D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Robinson, JT (reprint author), USN, Res Lab, Washington, DC 20375 USA.
RI Robinson, Jeremy/F-2748-2010; Rastelli, Armando/E-6955-2012
OI Rastelli, Armando/0000-0002-1343-4962
FU NSF [DMR-0349257]
FX We thank H von Kanel for fruitful discussions. ODD acknowledges support
from the NSF under contract no. DMR-0349257.
NR 42
TC 23
Z9 23
U1 1
U2 12
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
J9 NANOTECHNOLOGY
JI Nanotechnology
PD FEB 25
PY 2009
VL 20
IS 8
AR 085708
DI 10.1088/0957-4484/20/8/085708
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 403GM
UT WOS:000263071100033
PM 19417469
ER
PT J
AU Shaw, PT
Ko, DS
Chao, SY
AF Shaw, Ping-Tung
Ko, Dong Shan
Chao, Shenn-Yu
TI Internal solitary waves induced by flow over a ridge: With applications
to the northern South China Sea
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID LOCAL GENERATION; PROPAGATION; SOLITONS; ISLAND; WATER
AB The generation of internal solitary waves by barotropic tides over a ridge is studied in a nonhydrostatic numerical model under idealized oceanographic settings. The experiments examine the effects of ridge width, barotropic tidal strength, and stratification on wave generation. The barotropic tidal flow produces internal wave beams emitting from the ridge top if the slope of the ridge exceeds a critical value equal to the slope of the wave beam. Reflection and refraction of a wave beam in an upper ocean waveguide associated with a strong shallow thermocline produce horizontally propagating internal tides. When the local Froude number over a ridge is not small, lee waves generated on the ridge convert enough energy from the barotropic tides to the internal tides to form tidal bores and solitary waves. Increasing stratification at ridge depths enhances the generation of internal waves, particularly at the diurnal periods. In the Luzon Strait, the slope of the wave beam decreases in spring and summer as stratification at the ridge depths increases, favoring the generation of internal tides. Without the presence of a strong shallow thermocline, internal solitary waves are not observed east of the Luzon Strait. In the northern South China Sea, internal solitary waves are likely observed from April to July when a strong shallow thermocline is present. A deep mixed layer in winter suppresses the production of internal solitary waves.
C1 [Shaw, Ping-Tung] N Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27695 USA.
[Ko, Dong Shan] USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
[Chao, Shenn-Yu] Univ Maryland, Horn Point Lab, Ctr Environm Sci, Cambridge, MD 21613 USA.
RP Shaw, PT (reprint author), N Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27695 USA.
EM pt_shaw@ncsu.edu
NR 27
TC 53
Z9 57
U1 2
U2 15
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9275
EI 2169-9291
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD FEB 24
PY 2009
VL 114
AR C02019
DI 10.1029/2008JC005007
PG 11
WC Oceanography
SC Oceanography
GA 412PB
UT WOS:000263735600002
ER
PT J
AU Hanbicki, AT
Kioseoglou, G
Holub, MA
van't Erve, OMJ
Jonker, BT
AF Hanbicki, A. T.
Kioseoglou, G.
Holub, M. A.
van't Erve, O. M. J.
Jonker, B. T.
TI Electrical spin injection from Fe into ZnSe(001)
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE conduction bands; electroluminescence; ferromagnetic materials; II-VI
semiconductors; iron; Schottky barriers; spin polarised transport; zinc
compounds
ID SCHOTTKY-BARRIER; SEMICONDUCTOR; PHOTOEMISSION; METAL
AB We have electrically injected spin-polarized current from ferromagnetic Fe(001) contacts into n-type ZnSe(001) using reverse-biased Schottky tunnel barriers which form at the Fe/ZnSe interface. Electrons transport through 3000 A of n-ZnSe and radiatively recombine in GaAs, where the circular polarization of the electroluminescence provides a quantitative measure of spin polarization. We measure electron spin polarizations over 50% in the GaAs up to 100 K. Spin injection efficiencies achieved in Fe/ZnSe are comparable to those reported for Fe/AlGaAs or Fe/GaAs Schottky tunnel structures, consistent with the common band symmetries of the Fe majority band and the conduction band of the respective semiconductor.
C1 [Hanbicki, A. T.; Kioseoglou, G.; Holub, M. A.; van't Erve, O. M. J.; Jonker, B. T.] USN, Res Lab, Washington, DC 20375 USA.
[Kioseoglou, G.] Univ Crete, Dept Mat Sci & Technol, Iraklion 71003, Crete, Greece.
RP Hanbicki, AT (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM hanbicki@nrl.navy.mil; jonker@nrl.navy.mil
FU NRL Nanoscience Institute
FX This work was supported by core programs at NRL and the NRL Nanoscience
Institute. G. K. and O.M.J.E. gratefully acknowledge support as
NRL/George Washington University Research Associates. M. H. gratefully
acknowledges support as an NRL/National Research Council postdoctoral
associate. The authors further acknowledge A. Petrou of the University
at Buffalo for corroborating optical pumping data to determine
taur/taus for the GaAs.
NR 25
TC 4
Z9 5
U1 2
U2 7
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 FEB 23
PY 2009
VL 94
IS 8
AR 082507
DI 10.1063/1.3089837
PG 3
WC Physics, Applied
SC Physics
GA 413PG
UT WOS:000263804400052
ER
PT J
AU Shackleford, JA
Grote, R
Currie, M
Spanier, JE
Nabet, B
AF Shackleford, James A.
Grote, Richard
Currie, Marc
Spanier, Jonathan E.
Nabet, Bahram
TI Integrated plasmonic lens photodetector
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE diffraction gratings; integrated optoelectronics; lenses;
metal-semiconductor-metal structures; nanophotonics; photodetectors;
plasmonics; polaritons; surface plasmons
ID LIGHT
AB We present a fabricated metal-semiconductor-metal (MSM) photodetector exhibiting an enhanced photocurrent by integrating a nanoscale metallic grating into its contacts. This serves to increase the incident photon flux about the aperture of the device by guiding incident photons as surface plasmon polaritons. High speed time response data shows that the device responsivity may be increased without sacrificing speed. We demonstrate both a photocurrent enhancement and responsivity increase of about 90% at the design wavelength in comparison to otherwise identical MSM photodetectors without integrated nanoscale gratings. The device retains the MSM advantages of simplicity, planarity, and monolithic integrability.
C1 [Shackleford, James A.; Grote, Richard; Nabet, Bahram] Drexel Univ, Dept Elect & Comp Engn, Philadelphia, PA 19104 USA.
[Currie, Marc] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
[Spanier, Jonathan E.] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
RP Shackleford, JA (reprint author), Drexel Univ, Dept Elect & Comp Engn, Philadelphia, PA 19104 USA.
EM bnabet@coe.drexel.edu
OI Shackleford, James/0000-0002-7987-651X; Spanier,
Jonathan/0000-0002-3096-2644
FU National Science Foundation [ECCS 0702716]; U. S. Army Research Office
[W911NF-06-1-0127, W911NF-08-1-0067]
FX For financial support, the National Science Foundation, Electronic and
Photonic Devices Technology Grant No. ECCS 0702716 is acknowledged, with
additional support from the Materials Sciences Division of the U. S.
Army Research Office under Award Nos. W911NF-06-1-0127 and
W911NF-08-1-0067.
NR 15
TC 43
Z9 44
U1 2
U2 26
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 23
PY 2009
VL 94
IS 8
AR 083501
DI 10.1063/1.3086898
PG 3
WC Physics, Applied
SC Physics
GA 413PG
UT WOS:000263804400085
ER
PT J
AU Fontanella, JJ
Wintersgill, MC
Edmondson, CA
Lomax, JF
AF Fontanella, J. J.
Wintersgill, M. C.
Edmondson, C. A.
Lomax, J. F.
TI Water-associated dielectric relaxation in oxide nanoparticles
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID DYNAMICS; NANOCOMPOSITES; SPECTROSCOPY; BEHAVIOR; SILICA
AB Audio frequency dielectric relaxation studies were carried out over the temperature range 120 to 390K on nanoscale mesoporous silica coated with polystyrene and nanoscale. alumina. Two features are observed, both of which are attributed to water. A relaxation is observed at about 150 K and 1000 Hz that is thermally activated. The activation enthalpy is relatively high and the pre-exponential appears to be unusually low and to depend upon the water concentration. A model is presented that accounts for the apparently anomalous behaviour. This relaxation is attributed to water molecules bound at surface hydroxyl groups. A feature is found in the vicinity of 250 K and 1000 Hz that is associated with conductivity that varies omega(n). This response is attributed to hopping conductivity in loosely bound surface water.
C1 [Fontanella, J. J.; Wintersgill, M. C.; Edmondson, C. A.] USN Acad, Dept Phys, Annapolis, MD 21402 USA.
[Lomax, J. F.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
RP Fontanella, JJ (reprint author), Univ Padua, Dept Chem, I-35131 Padua, Italy.
EM fontanel@comcast.net
FU US Office of Naval Research
FX This work was supported in part by the US Office of Naval Research. The
authors thank Mark A Westgate for technical assistance. They also thank
Jeffrey P Calame and Debra Rolison of the Naval Research Laboratory for
helpful discussions and the group of Vito Di Noto at the University of
Padova for helpful discussions.
NR 14
TC 11
Z9 11
U1 1
U2 7
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 FEB 21
PY 2009
VL 42
IS 4
AR 042003
DI 10.1088/0022-3727/42/4/042003
PG 6
WC Physics, Applied
SC Physics
GA 402QY
UT WOS:000263029400003
ER
PT J
AU Helmboldt, JF
Walterbos, RAM
Bothun, GD
O'Neil, K
Oey, MS
AF Helmboldt, J. F.
Walterbos, R. A. M.
Bothun, G. D.
O'Neil, K.
Oey, M. S.
TI The dependence of H II region properties on global and local surface
brightness within galaxy discs
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE galaxies: ISM; galaxies: photometry; galaxies: star clusters
ID STAR-FORMING GALAXIES; DIGITAL SKY SURVEY; SPIRAL GALAXIES; LUMINOSITY
FUNCTION; OXYGEN ABUNDANCES; PHOTOMETRY; EVOLUTION; MASS; CO; DETECTIONS
AB Using B, R and Ha images of roughly equal-sized samples of low surface brightness (LSB) and high surface brightness (HSB) galaxies (similar to 40 galaxies apiece), we have explored the dependence of HII region properties on local and global disc surface brightness. We have done this by constructing co-added HII region luminosity functions (LFs) according to local and central disc surface brightness and fitting Schechter functions to these LFs. The results show that the shape of the HII region LF within LSB galaxies does not change noticeably as different limiting (i.e. mu > mu(lim)) local surface brightness values are used. However, the LFs for HSB galaxies have larger values of L-* and are less steep at the faint-end than those of LSB galaxies for limiting B-band local surface brightness values as faint as mu(B,lim) similar or equal to 23 - 24. Both the LFs and the data for individual HII regions show that luminous (L > 10(39) erg s(-1)) H II regions are much more common within HSB discs than within LSB discs, implying that the newly formed star clusters are also larger. Taking this into account along with the results of Monte Carlo simulations, the shapes of the LFs imply that the regions within LSB discs and those within the LSB areas of HSB discs are relatively old (similar to 5 Myr) while the regions within HSB discs for mu(B) less than or similar to 24 are significantly younger (< 1 Myr). Since the majority of the LSB galaxies do not have noticeable spiral arms and the majority of the HSB galaxies do, this may indicate a transition within HSB discs from spiral arm-driven star formation to a more locally driven, possibly sporadic form of star formation at mu(B) similar to 24, a transition that does not appear to occur within LSB discs.
C1 [Helmboldt, J. F.] USN, Res Lab, Washington, DC 20375 USA.
[Walterbos, R. A. M.] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA.
[Bothun, G. D.] Univ Oregon, Dept Phys, Eugene, OR 97403 USA.
[O'Neil, K.] Natl Radio Astron Observ, Green Bank, WV 24944 USA.
[Oey, M. S.] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
RP Helmboldt, JF (reprint author), USN, Res Lab, Code 7213,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM joe.helmboldt@nrl.navy.mil
RI Helmboldt, Joseph/C-8105-2012
NR 48
TC 7
Z9 7
U1 0
U2 0
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD FEB 21
PY 2009
VL 393
IS 2
BP 478
EP 490
DI 10.1111/j.1365-2966.2008.14062.x
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 406NN
UT WOS:000263302300009
ER
PT J
AU Nikitin, S
Manka, C
Grun, J
AF Nikitin, Sergei
Manka, Charles
Grun, Jacob
TI Modified Solc notch filter for deep ultraviolet applications
SO APPLIED OPTICS
LA English
DT Article
AB We present results of the design and testing of a modified optical Solc notch filter for use in the deep ultraviolet (DUV, 190-300 nm) spectral range. The filter was designed to block a specific wavelength in this region. In addition, a sequence of blocked wavelengths occurs at wavelengths both shorter and longer than the specified wavelength. For Raman applications utilizing tunable lasers, the provision of multiple blocked wavelengths by a single filter may be especially useful. The filter design presented here produces extinction ratios >240 with transmission minima similar to 1 nm full width at half-maximum. Specific results are shown for the Raman spectra of Teflon excited at 248.4 nm. (C) 2009 Optical Society of America
C1 [Nikitin, Sergei; Manka, Charles] Res Support Instruments, Lanham, MD 20706 USA.
[Grun, Jacob] Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Nikitin, S (reprint author), Res Support Instruments, 4325-B Forbes Blvd, Lanham, MD 20706 USA.
EM nikitins@researchsupport.com
RI Nikitin, Sergei/A-7156-2012
FU Defense Threat Reduction Agency-Joint Science and Technology
Office-Chemical and Biological Defense Program; [N00173-06-C-2049]
FX This work was sponsored by the Defense Threat Reduction Agency-Joint
Science and Technology Office-Chemical and Biological Defense Program.
Authors S. Nikitin and C. Manka performed under Naval Research
Laboratory (NRL) contract N00173-06-C-2049.
NR 9
TC 5
Z9 5
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 FEB 20
PY 2009
VL 48
IS 6
BP 1184
EP 1189
DI 10.1364/AO.48.001184
PG 6
WC Optics
SC Optics
GA 421VV
UT WOS:000264387300021
PM 23567580
ER
PT J
AU Montanari, E
Titarchuk, L
Frontera, F
AF Montanari, Enrico
Titarchuk, Lev
Frontera, Filippo
TI BeppoSAX OBSERVATIONS OF THE POWER AND ENERGY SPECTRAL EVOLUTION IN THE
BLACK HOLE CANDIDATE XTE J1650-500
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE accretion, accretion disks; black hole physics; radiation mechanisms:
non-thermal; stars: individual (XTE J1650-500)
ID X-RAY BINARIES; QUASI-PERIODIC OSCILLATION; ASTRONOMY SATELLITE;
FREQUENCY CORRELATION; NEUTRON-STAR; ON-BOARD; CONCENTRATOR
SPECTROMETER; MONTE-CARLO; XTE-J1650-500; CYGNUS-X-1
AB We study the time variability and spectral evolution of the black hole candidate source XTE J1650-500 using the BeppoSAX wide energy range (0.12-200 keV) observations performed during the 2001 X-ray outburst. The source evolves from a low/hard state (LHS) toward a high/soft state (HSS). In all states, the emergent photon spectrum is described by the sum of Comptonization and soft (disk) blackbody components. In the LHS, the Comptonization component dominates in the resulting spectrum. On the other hand, during the HSS observed by BeppoSAX the soft (disk) component is already dominant. In this state, the Comptonization part of the spectrum is much softer than that in the LHS (photon index Gamma is similar to 2.4 in the HSS vs. Gamma similar to 1.7 in the LHS). In the BeppoSAX data, we find a strong signature of the index saturation with the mass accretion rate, which can be considered as an observational evidence of the converging flow (black hole) in XTE J1650-500. We derive power spectra (PSs) of the source time variability in different spectral states as a function of energy band. When the source undergoes a transition to softer states, the PS as a whole is shifted to higher frequencies, which can be interpreted as a contraction of the Compton cloud during hard-soft spectral evolution. It is worthwhile to emphasize a detection of a strong low-frequency red noise component in the HSS PS, which can be considered a signature of the presence of the strong extended disk in the HSS. Also as a result of our data analysis, we find a very weak sign of K(alpha) line appearance in this BeppoSAX data set. This finding does not confirm previous claims by Miniutti et al. on the presence of a broad and strongly relativistic iron emission line in this particular set of BeppoSAX data.
C1 [Montanari, Enrico; Titarchuk, Lev; Frontera, Filippo] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy.
[Montanari, Enrico; Titarchuk, Lev] IIS Calvi, Finale Emilia, MO, Italy.
[Titarchuk, Lev] George Mason Univ, Ctr Earth Observing & Space Res, Fairfax, VA 22030 USA.
[Titarchuk, Lev] USN, Res Lab, Washington, DC 20375 USA.
[Titarchuk, Lev] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Frontera, Filippo] INAF IASF, I-40129 Bologna, Italy.
RP Montanari, E (reprint author), Univ Ferrara, Dipartimento Fis, Via Saragat 1, I-44100 Ferrara, Italy.
EM montana@fe.infn.it; lev.titarchuk@nrl.navy.mil; frontera@fe.infn.it
NR 50
TC 11
Z9 11
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 20
PY 2009
VL 692
IS 2
BP 1597
EP 1608
DI 10.1088/0004-637X/692/2/1597
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 411TW
UT WOS:000263674700049
ER
PT J
AU Stow, CA
Jolliff, J
McGillicuddy, DJ
Doney, SC
Allen, JI
Friedrichs, MAM
Rose, KA
Wallheadg, P
AF Stow, Craig A.
Jolliff, Jason
McGillicuddy, Dennis J., Jr.
Doney, Scott C.
Allen, J. Icarus
Friedrichs, Marjorie A. M.
Rose, Kenneth A.
Wallheadg, Philip
TI Skill assessment for coupled biological/physical models of marine
systems
SO JOURNAL OF MARINE SYSTEMS
LA English
DT Article
DE Goodness-of-fit; Skill metric; Skill assessment; Model uncertainty
ID WATER-QUALITY MODELS; ECOSYSTEM MODEL; DATA ASSIMILATION;
DECISION-MAKING; CURRENT STATE; OCEAN MODEL; NORTH-SEA; UNCERTAINTY;
QUANTIFICATION; VARIABILITY
AB Coupled biological/physical models of marine systems serve many purposes including the synthesis of information, hypothesis generation, and as a tool for numerical experimentation. However, marine system models are increasingly used for prediction to support high-stakes decision-making. In such applications it is imperative that a rigorous model skill assessment is conducted so that the model's capabilities are tested and understood. Herein, we review several metrics and approaches useful to evaluate model skill. The definition of skill and the determination of the skill level necessary for a given application is context specific and no single metric is likely to reveal all aspects of model skill. Thus, we recommend the use of several metrics, in concert, to provide a more thorough appraisal. The routine application and presentation of rigorous skill assessment metrics will also serve the broader interests of the modeling community, ultimately resulting in improved forecasting abilities as well as helping us recognize our limitations. Published by Elsevier B.V.
C1 [Stow, Craig A.] NOAA, Great Lakes Environm Res Lab, Ann Arbor, MI 48105 USA.
[Jolliff, Jason] USN, Res Lab, Stennis Space Ctr, Stennis Space Ctr, MS USA.
[McGillicuddy, Dennis J., Jr.; Doney, Scott C.] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA.
[Allen, J. Icarus] Plymouth Marine Lab, Plymouth PL1 3DH, Devon, England.
[Friedrichs, Marjorie A. M.] Virginia Inst Marine Sci, Coll William & Mary, Gloucester Point, VA 23062 USA.
[Rose, Kenneth A.] Louisiana State Univ, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA.
[Wallheadg, Philip] Natl Oceanog Ctr, Southampton, Hants, England.
RP Stow, CA (reprint author), NOAA, Great Lakes Environm Res Lab, 2205 Commonwealth Blvd, Ann Arbor, MI 48105 USA.
EM craig.stow@noaa.gov; jolliff@nrissc.navy.mil; dmcgillicuddy@whoi.edu;
sdoney@whoi.edu; jia@pml.ac.uk; marjy@vims.edu; karose@lsu.edu;
pjw5@noc.soton.ac.uk
RI Doney, Scott/F-9247-2010;
OI Doney, Scott/0000-0002-3683-2437; Stow, Craig/0000-0001-6171-7855;
Friedrichs, Marjorie/0000-0003-2828-7595
FU NERC core strategic Oceans2025 program; NOAA; NSF; NIEHS; ECOHAB
FX JIA was funded by theme 9 of the NERC core strategic Oceans2025 program.
This manuscript is GLERL contribution number 1464. DJM gratefully
acknowledges support from NOAA, NSF, and NIEHS; this is ECOHAB
contribution number 281.
NR 59
TC 159
Z9 161
U1 3
U2 43
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0924-7963
EI 1879-1573
J9 J MARINE SYST
JI J. Mar. Syst.
PD FEB 20
PY 2009
VL 76
IS 1-2
SI SI
BP 4
EP 15
DI 10.1016/j.jmarsys.2008.03.011
PG 12
WC Geosciences, Multidisciplinary; Marine & Freshwater Biology;
Oceanography
SC Geology; Marine & Freshwater Biology; Oceanography
GA 414GD
UT WOS:000263851000002
PM 28366997
ER
PT J
AU Jolliff, JK
Kindle, JC
Shulman, I
Penta, B
Friedrichs, MAM
Helber, R
Arnone, RA
AF Jolliff, Jason K.
Kindle, John C.
Shulman, Igor
Penta, Bradley
Friedrichs, Marjorie A. M.
Helber, Robert
Arnone, Robert A.
TI Summary diagrams for coupled hydrodynamic-ecosystem model skill
assessment
SO JOURNAL OF MARINE SYSTEMS
LA English
DT Article
DE Modeling; Marine ecosystem model; Statistical analysis; Remote sensing;
Phytoplankton
ID BIOGEOCHEMICAL MODEL; CALIFORNIA CURRENT; DATA ASSIMILATION;
PHYTOPLANKTON; COLOR; WATER; VALIDATION; SYSTEM
AB The increasing complexity of coupled hydrodynamic-ecosystem models may require skill assessment methods that both quantify various aspects of model performance and visually summarize these aspects within compact diagrams. Hence summary diagrams, such as the Taylor diagram [Taylor, 2001, journal of Geophysical Research, 106, D7, 7183-7192], may meet this requirement by exploiting mathematical relationships between widely known statistical quantities in order to succinctly display a suite of model skill metrics in a single plot. In this paper, sensitivity results from a coupled model are compared with Sea-viewing Wide Field-orview Sensor (SeaWiFS) satellite ocean color data in order to assess the utility of the Taylor diagram and to develop a set of alternatives. Summary diagrams are only effective as skill assessment tools insofar as the statistical quantities they communicate adequately capture differentiable aspects of model performance. Here we demonstrate how the linear correlation coefficients and variance comparisons (pattern statistics) that constitute a Taylor diagram may fail to identify other potentially important aspects of coupled model performance, even if these quantities appear close to their ideal values. An additional skill assessment tool, the target diagram is developed in order to provide summary information about how the pattern statistics and the bias (difference of mean values) each contribute to the magnitude of the total Root-Mean-Square Difference (RMSD). In addition, a potential inconsistency in the use of RMSD statistics as skill metrics for overall model and observation agreement is identified: underestimates of the observed field's variance are rewarded when the linear correlation scores are less than unity. An alternative skill score and skill score-based summary diagram is presented. Published by Elsevier B.V.
C1 [Jolliff, Jason K.] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Friedrichs, Marjorie A. M.] Virginia Inst Marine Sci, Gloucester Point, VA 23062 USA.
RP Jolliff, JK (reprint author), USN, Res Lab, Bldg 1009, Stennis Space Ctr, MS 39529 USA.
EM jolliff@nrlssc.navy.mil; kindie@nrisscnavy.mil;
igor.shulman@nrlssc.navy.mil; penta@nrissc.navy.mil; marjy@vims.edu;
helber@nrlssc.navy.mil; bob.arnone@nrlssc.navy.mil
OI Friedrichs, Marjorie/0000-0003-2828-7595
NR 32
TC 116
Z9 116
U1 0
U2 30
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0924-7963
EI 1879-1573
J9 J MARINE SYST
JI J. Mar. Syst.
PD FEB 20
PY 2009
VL 76
IS 1-2
SI SI
BP 64
EP 82
DI 10.1016/j.jmarsys.2008.05.014
PG 19
WC Geosciences, Multidisciplinary; Marine & Freshwater Biology;
Oceanography
SC Geology; Marine & Freshwater Biology; Oceanography
GA 414GD
UT WOS:000263851000006
ER
PT J
AU Gartland, GJ
Radcliffe, CJ
Hull, AJ
AF Gartland, Greg J.
Radcliffe, C. J.
Hull, Andrew J.
TI Measurement of dilatational wave speed using an echo reduction test
SO JOURNAL OF SOUND AND VIBRATION
LA English
DT Article
ID ACOUSTIC PANEL TESTS; MODULI
AB Echo reduction is a measure of it materials ability to reduce the reflection of acoustic energy and is a typical measurement performed in acoustic tanks. In this paper, an inverse method is developed to estimate the complex dilatational wave speed of a material using echo reduction data. The theory of echo reduction is briefly discussed, the inverse method is developed and then an experiment is conducted to illustrate the technique. The real parts of the resultant wave speed measurements are then compared to measurements using identification of discrete wavelengths. It is shown that the two measurement techniques produce extremely similar estimates. Published by Elsevier Ltd.
C1 [Hull, Andrew J.] USN, Autonomous & Def Syst Dept, Undersea Warfare Ctr Div, Newport, RI 02841 USA.
[Gartland, Greg J.] Robert Bosch LLC, Dept Mech, AE EED2 NA, Plymouth, MI 48170 USA.
[Radcliffe, C. J.] Michigan State Univ, Dept Mech Engn, E Lansing, MI 48824 USA.
RP Hull, AJ (reprint author), USN, Autonomous & Def Syst Dept, Undersea Warfare Ctr Div, Newport, RI 02841 USA.
EM gregory.gartland@us.bosch.com; radcliffe@egr.msu.edu;
hullaj@npt.nuwc.navy.mil
FU Office of Naval Research University Laboratory Initiative Program
FX This work was funded by the Office of Naval Research University
Laboratory Initiative Program. The authors wish to thank Program Manager
Dr. David M. Drumheller for sponsoring this effort.
NR 13
TC 0
Z9 1
U1 0
U2 0
PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0022-460X
J9 J SOUND VIB
JI J. Sound Vibr.
PD FEB 20
PY 2009
VL 320
IS 3
BP 491
EP 495
DI 10.1016/j.jsv.2008.12.004
PG 5
WC Acoustics; Engineering, Mechanical; Mechanics
SC Acoustics; Engineering; Mechanics
GA 412BG
UT WOS:000263697600003
ER
PT J
AU Spillmann, CM
Naciri, J
Wahl, KJ
Garner, YH
Chen, MS
Ratna, BR
AF Spillmann, Christopher M.
Naciri, Jawad
Wahl, Kathryn J.
Garner, Yancey H., III
Chen, Mu-San
Ratna, Banahalli R.
TI Role of Surfactant in the Stability of Liquid Crystal-Based Nanocolloids
SO LANGMUIR
LA English
DT Article
ID ELASTOMER FILMS; POLYMER; NANOPARTICLES; COLLOIDS; MINIEMULSIONS;
DROPLETS
AB We examine the dependence of liquid crystalline nanocolloid formation and stability on surfactant. Nanocolloids composed of polymerizable liquid crystal mesogens and cross-linking agents, and capped with either ionic or nonionic surfactants are prepared via the miniemulsion technique. Colloids synthesized with anionic surfactant were stable and displayed 2D hexagonal packing when deposited via slow vertical pulling of the silicon substrate from an aqueous suspension. Liquid crystal nanocolloids stabilized with the nonionic, polar polymer polyvinyl alcohol (PVA) were stable in aqueous environments but coalesced upon drying to form relatively large, well-defined crystal-like structures with uniform birefringence. SEM images reveal that the coalesced structures have mesalike features. Polarized light, atomic force, and polarized Raman microscopy of these structures indicate that the liquid crystal molecules are arranged with their long molecular axis slightly tilted with respect to the surface normal. A mechanism is proposed to explain the formation of the mesalike structures from the nanocolloids. These studies provide fundamental insight into the incorporation and stabilization of polymerizable liquid crystal molecules into nanovolumes and open up opportunities for the incorporation of functionality and anisotropy into isotropically shaped nanocolloids.
C1 [Spillmann, Christopher M.; Naciri, Jawad; Chen, Mu-San; Ratna, Banahalli R.] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
[Wahl, Kathryn J.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
[Garner, Yancey H., III] Nova Res Inc, Alexandria, VA 22308 USA.
RP Ratna, BR (reprint author), USN, Res Lab, Ctr Biomol Sci & Engn, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM banahalli.ratna@nrl.navy.mil
OI Wahl, Kathryn/0000-0001-8163-6964
FU Office of Naval Research (ONR); Defense Threat Reduction Agency (DTRA)
FX We thank Dr. Amy Blum for helpful discussions and the Office of Naval
Research (ONR) and the Defense Threat Reduction Agency (DTRA) for
financial support.
NR 21
TC 13
Z9 13
U1 4
U2 22
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD FEB 17
PY 2009
VL 25
IS 4
BP 2419
EP 2426
DI 10.1021/la802881u
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 407OG
UT WOS:000263373600076
PM 19154135
ER
PT J
AU Finkel, P
Lofland, SE
Garrity, E
AF Finkel, Peter
Lofland, Samuel E.
Garrity, Ed
TI Magnetoelastic/piezoelectric laminated structures for tunable remote
contactless magnetic sensing and energy harvesting
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE energy harvesting; laminates; magnetic sensors; magnetoelastic effects;
Permalloy; piezoelectricity; polymers
ID STRESS; FIELD
AB In this letter, we report a method for a tunable magnetic field sensor based on the magnetoelastic coupling properties of a magnetoelastic/piezoelectric laminated composite structure. The magnetically and elastically tunable, flexural resonant mode in the bimorph FeNi36% (invar)/polyvinylidene fluoride clamped bilayer has been investigated by Doppler laser spectroscopy. Here we demonstrate that this bimorph structure can be used for low-frequency contactless detection of magnetic field fluctuation and magnetic field monitoring.
C1 [Finkel, Peter] USN, Undersea Warfare Ctr, Newport, RI 02841 USA.
[Lofland, Samuel E.] Rowan Univ, Dept Phys & Astron, Glassboro, NJ 08028 USA.
[Garrity, Ed] ACR Sci Corp, Lancaster, PA 17601 USA.
RP Finkel, P (reprint author), USN, Undersea Warfare Ctr, Newport, RI 02841 USA.
EM pf22@drexel.edu
OI Lofland, Samuel/0000-0002-1024-5103
NR 33
TC 12
Z9 12
U1 0
U2 16
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 16
PY 2009
VL 94
IS 7
AR 072502
DI 10.1063/1.3082099
PG 3
WC Physics, Applied
SC Physics
GA 410SS
UT WOS:000263599200044
ER
PT J
AU Jacobson, IG
Smith, TC
Smith, B
Keel, PK
Amoroso, PJ
Wells, TS
Bathalon, GP
Boyko, EJ
Ryan, MAK
AF Jacobson, Isabel G.
Smith, Tyler C.
Smith, Besa
Keel, Pamela K.
Amoroso, Paul J.
Wells, Timothy S.
Bathalon, Gaston P.
Boyko, Edward J.
Ryan, Margaret A. K.
CA Millennium Cohort Study Team
TI Disordered Eating and Weight Changes After Deployment: Longitudinal
Assessment of a Large US Military Cohort
SO AMERICAN JOURNAL OF EPIDEMIOLOGY
LA English
DT Article
DE body weight changes; cohort studies; eating disorders; military
medicine; military personnel
ID POSTTRAUMATIC-STRESS-DISORDER; READJUSTMENT RATING-SCALE; MENTAL-HEALTH
PROBLEMS; GULF-WAR VETERANS; MILLENNIUM COHORT; CONTRIBUTING FACTORS;
CAGE QUESTIONNAIRE; BULIMIA-NERVOSA; ALCOHOL-USE; PREVALENCE
AB The effect of military deployments to combat environments on disordered eating and weight changes is unknown. Using longitudinal data from Millennium Cohort Study participants who completed baseline (2001-2003) and follow-up (2004-2006) questionnaires (n = 48,378), the authors investigated new-onset disordered eating and weight changes in a large military cohort. Multivariable logistic regression was used to compare these outcomes among those who deployed and reported combat exposures, those who deployed but did not report combat exposures, and those who did not deploy in support of the wars in Iraq and Afghanistan. Deployment was not significantly associated with new-onset disordered eating in women or men, after adjustment for baseline demographic, military, and behavioral characteristics. However, in subgroup comparison analyses of deployers, deployed women reporting combat exposures were 1.78 times more likely to report new-onset disordered eating (95% confidence interval: 1.02, 3.11) and 2.35 times more likely to lose 10% or more of their body weight compared with women who deployed but did not report combat exposures (95% confidence interval: 1.17, 4.70). Despite no significant overall association between deployment and disordered eating and weight changes, deployed women reporting combat exposures represent a subgroup at higher risk for developing eating problems and weight loss.
C1 [Jacobson, Isabel G.; Smith, Tyler C.; Smith, Besa; Ryan, Margaret A. K.] USN, Hlth Res Ctr, Dept Def Ctr Deployment Hlth Res, San Diego, CA 92106 USA.
[Keel, Pamela K.] Florida State Univ, Dept Psychol, Tallahassee, FL 32306 USA.
[Amoroso, Paul J.] Madigan Army Med Ctr, Ft Lewis, WA USA.
[Wells, Timothy S.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Bathalon, Gaston P.] USA, Environm Med Res Inst, Natick, MA 01760 USA.
[Boyko, Edward J.] Dept Vet Affairs Puget Sound Hlth Care Syst, Seattle Epidemiol Res & Informat Ctr, Seattle, WA USA.
RP Jacobson, IG (reprint author), USN, Hlth Res Ctr, Dept Def Ctr Deployment Hlth Res, 140 Sylvester Rd, San Diego, CA 92106 USA.
EM isabel.jacobson@med.navy.mil
FU Military Operational Medicine Research Program of the US Army Medical
Research; Materiel Command, Fort Dietrick, Maryland
FX The Millennium Cohort Study is funded through the Military Operational
Medicine Research Program of the US Army Medical Research and Materiel
Command, Fort Dietrick, Maryland.
NR 55
TC 43
Z9 44
U1 2
U2 7
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 0002-9262
J9 AM J EPIDEMIOL
JI Am. J. Epidemiol.
PD FEB 15
PY 2009
VL 169
IS 4
BP 415
EP 427
DI 10.1093/aje/kwn366
PG 13
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 407ZR
UT WOS:000263403300005
PM 19193718
ER
PT J
AU Bagui, M
Melinger, JS
Chakraborty, S
Keightley, JA
Peng, ZH
AF Bagui, Mahuya
Melinger, Joseph S.
Chakraborty, Sanjiban
Keightley, J. Andrew
Peng, Zhonghua
TI Synthesis and optical properties of triphenylene-based conjugated
dendrons
SO TETRAHEDRON
LA English
DT Article
DE Triphenylene; Dendrimers; Fluorescence; Light-harvesting
ID DISCOTIC LIQUID-CRYSTALS; LIGHT-HARVESTING DENDRIMERS; ENERGY-TRANSFER;
PHENYLACETYLENE DENDRIMERS; PHOTOPHYSICAL PROPERTIES; EXCITED-STATES;
CHROMOPHORES; EFFICIENCY; POLYMERS; SHAPE
AB Conjugated dendrons based on triphenylene building blocks have been synthesized. Such dendrons exhibit broader absorption wavelength range and higher absorption coefficients than their phenyl analogs. They also possess extended excited state lifetimes and high fluorescence quantum yields in dilute Solutions. In the solid state, these dendrons are highly aggregated, resulting in significantly broadened and red-shifted emissions, whose decay transients depend strongly on the detection wavelength. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Bagui, Mahuya; Chakraborty, Sanjiban; Peng, Zhonghua] Univ Missouri, Dept Chem, Kansas City, MO 64110 USA.
[Melinger, Joseph S.] USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
[Keightley, J. Andrew] Univ Missouri, Sch Biol Sci, Kansas City, MO 64110 USA.
RP Peng, ZH (reprint author), Univ Missouri, Dept Chem, Kansas City, MO 64110 USA.
EM pengz@umkc.edu
FU National Science Foundation [DMR-0804158]
FX This work was supported by the National Science Foundation
(DMR-0804158). We thank Dr. Nathan Oyler for the HPLC measurements.
NR 67
TC 8
Z9 8
U1 3
U2 16
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0040-4020
J9 TETRAHEDRON
JI Tetrahedron
PD FEB 14
PY 2009
VL 65
IS 7
BP 1247
EP 1256
DI 10.1016/j.tet.2008.12.017
PG 10
WC Chemistry, Organic
SC Chemistry
GA 404LJ
UT WOS:000263153100004
ER
PT J
AU Ivanov, LM
Collins, CA
Margolina, TM
AF Ivanov, L. M.
Collins, C. A.
Margolina, T. M.
TI System of quasi-zonal jets off California revealed from satellite
altimetry
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID ROSSBY WAVES; TURBULENCE; FLOWS; GENERATION; REPRESENTATION;
CIRCULATION; SELECTION
AB A discrete wavelet transform was applied to satellite altimetry data for the period 1992-2007 off California to decompose the SSH signal into inter-annual, annual, semiannual and shorter period components. For the lowest frequency (inter-annual) component, a system of alternating quasi-zonal jets was detected. The jet system was delineated by a north-south series of quasi-zonal bands of co-rotating eddies; that is, the eddies were embedded in a shearing zonal flow. The direction of eddy rotation alternated between adjacent bands. The temporal behavior of the jet system showed the existence of quasi-stationary states and transitions between them. Observed non-linear effects of the evolution of the jets included southward drift at about 0.2 cm sec(-1), deviations of the jets from the zonal direction, and re-forming of the jet system through decay and merging of eddy chains. Citation: Ivanov, L. M., C. A. Collins, and T. M. Margolina (2009), System of quasi-zonal jets off California revealed from satellite altimetry, Geophys. Res. Lett., 36, L03609, doi: 10.1029/2008GL036327.
C1 [Ivanov, L. M.] Moss Landing Marine Labs, Moss Landing, CA 95039 USA.
[Collins, C. A.; Margolina, T. M.] USN, Postgrad Sch, Monterey, CA 93940 USA.
[Ivanov, L. M.; Margolina, T. M.] Natl Acad Sci Ukraine, Inst Marine Hydrophys, Sevastopol, Ukraine.
RP Ivanov, LM (reprint author), Moss Landing Marine Labs, Pob 450, Moss Landing, CA 95039 USA.
EM lmivanov@nps.edu
FU NSF [OCE-0827527, CMG-0530748, OCE-0827160]
FX Funding for LI (CC) was provided by NSF grant OCE-0827527 (CMG-0530748
and OCE-0827160). TM is an NRC Associate at NPS. Comments of both
anonymous reviewers were very helpful in improving this paper.
NR 27
TC 12
Z9 12
U1 2
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 FEB 13
PY 2009
VL 36
AR L03609
DI 10.1029/2008GL036327
PG 6
WC Geosciences, Multidisciplinary
SC Geology
GA 406XR
UT WOS:000263328700002
ER
PT J
AU Springer, SR
Samelson, RM
Allen, JS
Egbert, GD
Kurapov, AL
Miller, RN
Kindle, JC
AF Springer, S. R.
Samelson, R. M.
Allen, J. S.
Egbert, G. D.
Kurapov, A. L.
Miller, R. N.
Kindle, J. C.
TI A nested grid model of the Oregon Coastal Transition Zone: Simulations
and comparisons with observations during the 2001 upwelling season
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID CALIFORNIA CURRENT SYSTEM; CONTINENTAL-SHELF CIRCULATION; NORTHERN
CALIFORNIA; WIND STRESS; OCEANIC MODEL; SURFACE; CAPE; JET; COORDINATE;
PACIFIC
AB The Oregon Coastal Transition Zone (OCTZ) extends several hundred kilometers offshore where shelf flows interact with the northern California Current. A primitive-equation numerical ocean model is used to study the upwelling circulation in this region from 1 May to 1 November 2001. This OCTZ model obtains initial and boundary conditions from a larger-scale model of the California Current System and forcing from a regional atmospheric model product. The model results are compared with extensive in situ and remotely sensed data, and the model is found to provide a realistic representation of flows both over the shelf and in the broader OCTZ. Simulation of coastal sea level and shelf currents over the complex topography of the central Oregon coast is improved quantitatively relative to previous regional models. A particularly significant qualitative improvement is realistic representation of coastal jet separation and eddy formation offshore of Cape Blanco. Three-dimensional Lagrangian analysis of water parcel displacement shows that the surface waters inshore of the separated jet are upwelled from near the bottom along the shelf as far north as 45.5 degrees N. A large eddy, which incorporates some of this upwelled water and carries it farther westward, forms offshore in the late summer. Ensemble simulations show a distinction between the strongly deterministic response to wind forcing over the shelf and the more unstable, less predictable jet separation and offshore eddy formation processes in the region near Cape Blanco.
C1 [Springer, S. R.; Samelson, R. M.; Allen, J. S.; Egbert, G. D.; Kurapov, A. L.; Miller, R. N.] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
[Kindle, J. C.] USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
RP Springer, SR (reprint author), Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
EM springer@esr.org
OI Egbert, Gary/0000-0003-1276-8538
FU U.S. Office of Naval Research [N00014-05-1-0891]
FX This research was supported by the U.S. Office of Naval Research, grant
N00014-05-1-0891 through the National Ocean Partnership Program.
Computer time was provided by Arctic Region Supercomputing Center.
Jianping Gan provided code for the implementation of boundary
conditions. S. de Rada provided the NCOM-CCS model output. The COAST
mooring data were provided by M. Levine, T. Boyd, and P. M. Kosro, the
NH-10 mooring data and HF radar data were provided by P. M. Kosro, and
the Seasoar sections were provided by J. Barth. The altimeter products
were produced by Ssalto/Duacs and distributed by Aviso, with support
from CNES. NCEP Reanalysis data was provided by the NOAA/OAR/ESRL PSD,
Boulder, Colorado, USA, from their Web site at http://www.cdc.noaa.gov/.
NR 61
TC 15
Z9 15
U1 0
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9275
EI 2169-9291
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD FEB 13
PY 2009
VL 114
AR C02010
DI 10.1029/2008JC004863
PG 22
WC Oceanography
SC Oceanography
GA 406YJ
UT WOS:000263330500002
ER
PT J
AU Hwang, PA
AF Hwang, Paul A.
TI Comment on "A study of the slope probability density function of the
ocean waves from radar observations'' by D. Hauser et al.
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Editorial Material
ID MEAN-SQUARE SLOPE; EQUILIBRIUM; BACKSCATTER
C1 USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
RP Hwang, PA (reprint author), USN, Remote Sensing Div, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM paul.hwang@nrl.navy.mil
NR 20
TC 5
Z9 5
U1 1
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9275
EI 2169-9291
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD FEB 12
PY 2009
VL 114
AR C02008
DI 10.1029/2008JC005005
PG 5
WC Oceanography
SC Oceanography
GA 406YI
UT WOS:000263330400004
ER
PT J
AU Dermer, CD
Finke, JD
Krug, H
Bottcher, M
AF Dermer, Charles D.
Finke, Justin D.
Krug, Hannah
Boettcher, Markus
TI GAMMA-RAY STUDIES OF BLAZARS: SYNCHRO-COMPTON ANALYSIS OF FLAT SPECTRUM
RADIO QUASARS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: active; galaxies: jets; gamma rays: theory; methods:
analytical; radiation mechanisms: non-thermal
ID ACTIVE GALACTIC NUCLEI; EXTERNAL RADIATION-FIELDS; PHOTON-PHOTON
COLLISIONS; HIGH-ENERGY EMISSION; BL-LACERTAE; MULTIWAVELENGTH
OBSERVATIONS; EXTRAGALACTIC JETS; NONTHERMAL SOURCES; PAIR PRODUCTION;
TEV BLAZARS
AB We extend a method for modeling synchrotron and synchrotron self-Compton radiations in blazar jets to include external Compton (EC) processes. The basic model assumption is that the blazar radio through soft X-ray flux is nonthermal synchrotron radiation emitted by isotropically distributed electrons in the randomly directed magnetic field of outflowing relativistic blazar jet plasma. Thus, the electron distribution is given by the synchrotron spectrum, depending only on the Doppler factor delta(D) and the mean magnetic field B, given that the comoving emission region size scale R'(b) less than or similar to c delta(D)t(v)/(1 + z), where t(v) is the variability time and z is the source redshift. Generalizing the approach of Georganopoulos, Kirk, & Mastichiadis to arbitrary anisotropic target radiation fields, we use the electron spectrum implied by the synchrotron component to derive accurate Compton-scattered gamma-ray spectra throughout the Thomson and Klein-Nishina regimes for EC scattering processes. We derive and calculate accurate gamma-ray spectra produced by relativistic electrons that Compton-scatter (1) a point source of radiation located radially behind the jet, (2) photons from a thermal Shakura-Sunyaev accretion disk, and (3) target photons from the central source scattered by a spherically symmetric shell of broad-line region gas. The calculations of broadband spectral energy distributions from the radio through gamma-ray regimes are presented, which include self-consistent gamma gamma absorption on the same radiation fields that provide target photons for Compton scattering. The application of this baseline flat spectrum radio/gamma-ray quasar model is considered in view of data from gamma-ray telescopes and contemporaneous multiwavelength campaigns.
C1 [Dermer, Charles D.; Finke, Justin D.; Krug, Hannah] USN, Res Lab, Washington, DC 20375 USA.
[Krug, Hannah] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Boettcher, Markus] Ohio Univ, Dept Phys & Astron, Inst Astrophys, Athens, OH 45701 USA.
RP Dermer, CD (reprint author), USN, Res Lab, Code 7653,4555 Overlook SW, Washington, DC 20375 USA.
EM charles.dermer@nrl.navy.mil
FU NASA Swift Guest Investigator Grant [DPR-NNG05ED411]; NASA GLAST Science
Investigation [DPR-S-1563-Y]; Office of Naval Research
FX We thank the referee for asking us to address the potential importance
of higher order SSC fluxes, and for other helpful comments. The work of
J.D.F. is supported by NASA Swift Guest Investigator Grant
DPR-NNG05ED411 and NASA GLAST Science Investigation DPR-S-1563-Y, which
also supported summer research by H. K. at NRL, and a visit by M. B. to
NRL. C.D.D. is supported by the Office of Naval Research.
NR 60
TC 86
Z9 89
U1 1
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 10
PY 2009
VL 692
IS 1
BP 32
EP 46
DI 10.1088/0004-637X/692/1/32
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 410CG
UT WOS:000263553000003
ER
PT J
AU Martin, PJ
Book, JW
Burrage, DM
Rowley, CD
Tudor, M
AF Martin, P. J.
Book, J. W.
Burrage, D. M.
Rowley, C. D.
Tudor, M.
TI Comparison of model-simulated and observed currents in the central
Adriatic during DART
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID SEA GENERAL-CIRCULATION; COASTAL OCEAN MODEL; WINTER; WATER
AB Numerical simulations of the Adriatic Sea were performed with the Navy Coastal Ocean Model (NCOM) during the Dynamics of the Adriatic in Real Time (DART) Experiments conducted between October 2005 and September 2006. Grid resolution was 1 km. Model forcing included tides, surface fluxes from the Aire Limitee Adaptation Dynamique Developpement International (ALADIN) atmospheric model, relaxation to a daily satellite sea surface temperature analysis, extensive river and runoff discharges, and open boundary conditions south of Otranto specified from a global model. Currents predicted by the model were compared with currents from 12 Acoustic Doppler Current Profiler (ADCP) moorings located along a line between the Gargano Peninsula, Italy, and Split, Croatia. The nontidal comparisons were performed with detided currents. Correlations between the model and ADCP currents were highest in the Western Adriatic Current (WAC), which flows southeastward along the Italian coast. Lowest correlations were in the interior of the Adriatic, likely because of instability processes. Correlations between the ALADIN winds and the model and ADCP currents at the mooring locations were also highest in the WAC. For November 2005 through August 2006, the model and ADCP mean WAC transports were 0.321 and 0.304 Sv, respectively, with a temporal correlation of 0.79. Comparison of current variance showed best agreement near the Italian and Croatian coasts. In the interior, the NCOM current variance compared fairly well with that of the ADCPs for November-January but decreased significantly relative to the ADCPs for February-August. Spectral analyses indicate most of the difference in variance to be at periods exceeding 2 days.
C1 [Martin, P. J.; Rowley, C. D.] USN, Stennis Space Ctr, Res Lab, Ocean Dynam & Predict Branch,Oceanog Div, Stennis Space Ctr, MS 39529 USA.
[Tudor, M.] Croatian Meteorol & Hydrol Serv, HR-10000 Zagreb, Croatia.
RP Martin, PJ (reprint author), USN, Stennis Space Ctr, Res Lab, Ocean Dynam & Predict Branch,Oceanog Div, Stennis Space Ctr, MS 39529 USA.
EM paul.martin@nrlssc.navy.mil; book@nrlssc.navy.mil;
derek.burrage@nrlssc.navy.mil; clark.rowley@nrlssc.navy.mil;
tudor@cirus.dhz.hr
OI Rowley, Clark/0000-0003-3496-6404; Tudor, Martina/0000-0002-2683-2652
FU Office of Naval Research; "Global Remote Littoral Forcing via Deep Water
Pathways'' research programs [0602435N, 0601153N];
[NRL/JA/7320-08-8149]
FX Thanks to the captains, crews, and scientists of the R/V G. Dallaporta,
R/V Alliance, and R/V Universitatis for the successful deployments and
recoveries of all the moorings. The success of the mooring effort was in
large part due to the dedicated efforts of Mark Hulbert, Andrew Quaid,
and Wesley Goode of the NRL technical team. We thank Elio Pachini of
CNR-ISMAR-Ancona and Giuseppe Siena of CoNISMa for their respective help
during the first deployment and final recovery cruises. Also, thanks to
Elio Pachini, Mira Morovic, Mirko Orlic, Gordana Beg Paklar, Aniello
Russo, and Sandro Carniel for their help with cruise logistics and
planning. Michel Rixen of the NATO Undersea Research Centre (NURC) led
and organized the larger international DART collaborative project and
contributed in many ways to this work. The NRL DART project greatly
benefited from being part of a NURC/NRL Joint Research Project and from
the larger collaborative effort. Thanks to the reviewers for their
useful suggestions. This work was supported by the Office of Naval
Research as part of the "Dynamics of the Adriatic in RealTime'' and
"Global Remote Littoral Forcing via Deep Water Pathways'' research
programs (Program Elements 0602435N and 0601153N, respectively). This is
NRL contribution NRL/JA/7320-08-8149.
NR 46
TC 17
Z9 17
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD FEB 10
PY 2009
VL 114
AR C01S05
DI 10.1029/2008JC004842
PG 18
WC Oceanography
SC Oceanography
GA 406YG
UT WOS:000263330200001
ER
PT J
AU Huang, L
Massa, L
Karle, J
AF Huang, Lulu
Massa, Lou
Karle, Jerome
TI Kernel energy method applied to vesicular stomatitis virus nucleoprotein
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE Hartree-Fock; KEM; Moller-Plesset; quantum mechanics
ID MOLECULAR-ORBITAL METHODS; BASIS-SET; RNA; ELEMENTS; ATOMS
AB The kernel energy method (KEM) is applied to the vesicular stomatitis virus (VSV) nucleoprotein (PDB ID code 2QVJ). The calculations employ atomic coordinates from the crystal structure at 2.8-angstrom resolution, except for the hydrogen atoms, whose positions were modeled by using the computer program HYPERCHEM. The calculated KEM ab initio limited basis Hartree-Fock energy for the full 33,175 atom molecule (including hydrogen atoms) is obtained. In the KEM, a full biological molecule is represented by smaller "kernels'' of atoms, greatly simplifying the calculations. Collections of kernels are well suited for parallel computation. VSV consists of five similar chains, and we obtain the energy of each chain. Interchain hydrogen bonds contribute to the interaction energy between the chains. These hydrogen bond energies are calculated in Hartree-Fock (HF) and Moller-Plesset perturbation theory to second order (MP2) approximations by using 6-31G** basis orbitals. The correlation energy, included in MP2, is a significant factor in the interchain hydrogen bond energies.
C1 [Huang, Lulu; Karle, Jerome] USN, Res Lab, Washington, DC 20375 USA.
[Massa, Lou] CUNY, Dept Chem, Hunter Coll, New York, NY 10065 USA.
[Massa, Lou] CUNY, Grad Ctr, New York, NY 10065 USA.
RP Karle, J (reprint author), USN, Res Lab, Code 6030,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM jerome.karle@nrl.navy.mil
FU National Institutes of Health [RR-03037]; National Center for Research
Resources
FX We thank the Office of Naval Research for supporting the work at the
Naval Research Laboratory (NRL). L. M. thanks the U. S. Navy Summer
Faculty Research Program administered by the American Society of
Engineering Education for the opportunity to spend summers at NRL. This
work was funded by the National Institutes of Health Grant RR-03037 (to
L. M.) and the National Center for Research Resources.
NR 19
TC 19
Z9 19
U1 0
U2 4
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD FEB 10
PY 2009
VL 106
IS 6
BP 1731
EP 1736
DI 10.1073/pnas.0811959106
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 405VO
UT WOS:000263252500013
PM 19188588
ER
PT J
AU Hader, J
Moloney, JV
Koch, SW
Vurgaftman, I
Meyer, JR
AF Hader, J.
Moloney, J. V.
Koch, S. W.
Vurgaftman, I.
Meyer, J. R.
TI Microscopic analysis of mid-infrared type-II "W" diode lasers
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE infrared sources; photoluminescence; semiconductor lasers;
thermo-optical devices
AB Mid-infrared diode lasers with type-II "W" active regions are analyzed using a fully microscopic many-body theory. The Auger carrier losses are found to dominate over radiative losses even at low temperatures. The experimentally observed strong temperature-dependent increase in Auger losses is shown to be a consequence of thermal gain reduction causing increased threshold carrier densities. Good agreement between theory and experiment is demonstrated for temperature-dependent photoluminescence spectra as well as threshold loss currents.
C1 [Hader, J.; Moloney, J. V.] Nonlinear Control Strategies Inc, Tucson, AZ 85705 USA.
[Koch, S. W.] Univ Marburg, Dept Phys, D-35032 Marburg, Germany.
[Koch, S. W.] Univ Marburg, Ctr Mat Sci, D-35032 Marburg, Germany.
[Vurgaftman, I.; Meyer, J. R.] USN, Res Lab, Washington, DC 20375 USA.
RP Hader, J (reprint author), Nonlinear Control Strategies Inc, 3542 N Geronimo Ave, Tucson, AZ 85705 USA.
EM jhader@acms.arizona.edu
FU U.S. Air Force Office of Scientific Research [FA9550-07-1-0573];
Deutsche Forschungsgemeinschaft; Humboldt Foundation; Phase II STTR
[FA9550-06-C-0044]
FX This work was supported by the U.S. Air Force Office of Scientific
Research, Contract No. FA9550-07-1-0573, by the Deutsche
Forschungsgemeinschaft and the Humboldt Foundation. NLCSTR acknowledges
support through a Phase II STTR Contract No. FA9550-06-C-0044.
NR 11
TC 10
Z9 10
U1 3
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 9
PY 2009
VL 94
IS 6
AR 061106
DI 10.1063/1.3080216
PG 3
WC Physics, Applied
SC Physics
GA 408BW
UT WOS:000263409400006
ER
PT J
AU Feldman, JL
Johnson, JK
Hemley, RJ
AF Feldman, J. L.
Johnson, J. Karl
Hemley, Russell J.
TI Vibron hopping and bond anharmonicity in hot dense hydrogen
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE anharmonic lattice modes; hopping conduction; hydrogen; melting;
molecular dynamics method; Raman spectra; rotational states; vibronic
states
ID PATH-INTEGRAL SIMULATIONS; VIBRATIONAL RAMAN-SPECTRA; SOLID HYDROGEN;
MIXED-CRYSTALS; MOLECULAR-HYDROGEN; MEGABAR PRESSURES; ROOM-TEMPERATURE;
FLUID HYDROGEN; ENERGY BANDS; DEUTERIUM
AB The Raman-active vibron of dense hydrogen has been shown to exhibit unexpected changes as a function of pressure and temperature to above 100 GPa. To understand these results we have performed supercell-based calculations using Van Kranendonk theory taking into account the renormalization of the hopping parameter by the lattice vibrations. We find that the major temperature dependence at this level of theory comes from the differences in populations of rotational states. The theory provides a fair description of the experimental results up to 70 GPa. We examine in detail a number of assumptions made in the application of the Van Kranendonk model to hydrogen as a function of pressure and temperature. We also present results of hybrid path integral molecular dynamics calculations in the fluid state at a low pressure (7 GPa) near the melting temperature. An amorphous-solid model of the fluid predicts that the Raman vibron frequencies change little upon melting, in agreement with experiment. The Van Kranendonk theory with fixed rotational identities of the molecules tends to predict more peaks in the Raman spectrum than are observed experimentally.
C1 [Feldman, J. L.] USN, Res Lab, Ctr Computat Mat, Washington, DC 20375 USA.
[Feldman, J. L.] George Mason Univ, Dept Computat & Data Sci, Fairfax, VA 22030 USA.
[Johnson, J. Karl] Univ Pittsburgh, Dept Chem & Petr Engn, Pittsburgh, PA 15261 USA.
[Johnson, J. Karl] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
[Hemley, Russell J.] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
RP Feldman, JL (reprint author), USN, Res Lab, Ctr Computat Mat, Washington, DC 20375 USA.
EM feldman@dave.nrl.navy.mil
RI Johnson, Karl/E-9733-2013
OI Johnson, Karl/0000-0002-3608-8003
NR 43
TC 4
Z9 4
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 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD FEB 7
PY 2009
VL 130
IS 5
AR 054502
DI 10.1063/1.3072713
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 404QC
UT WOS:000263167100031
PM 19206979
ER
PT J
AU Abelev, BI
Aggarwal, MM
Ahammed, Z
Anderson, BD
Arkhipkin, D
Averichev, GS
Bai, Y
Balewski, J
Barannikova, O
Barnby, LS
Baudot, J
Baumgart, S
Beavis, DR
Bellwied, R
Benedosso, F
Betts, RR
Bhardwaj, S
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Biritz, B
Bland, LC
Bombara, M
Bonner, BE
Botje, M
Bouchet, J
Braidot, E
Brandin, AV
Bruna, E
Bueltmann, S
Burton, TP
Bystersky, M
Cai, XZ
Caines, H
Sanchez, MCD
Callner, J
Catu, O
Cebra, D
Cendejas, R
Cervantes, MC
Chajecki, Z
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Cheng, J
Cherney, M
Chikanian, A
Choi, KE
Christie, W
Chung, SU
Clarke, RF
Codrington, MJM
Coffin, JP
Cormier, TM
Cosentino, MR
Cramer, JG
Crawford, HJ
Das, D
Dash, S
Daugherity, M
De Silva, C
de Moura, MM
Dedovich, TG
DePhillips, M
Derevschikov, AA
de Souza, RD
Didenko, L
Djawotho, P
Dogra, SM
Dong, X
Drachenberg, JL
Draper, JE
Du, F
Dunlop, JC
Mazumdar, MRD
Edwards, WR
Efimov, LG
Elhalhuli, E
Elnimr, M
Emelianov, V
Engelage, J
Eppley, G
Erazmus, B
Estienne, M
Eun, L
Fachini, P
Fatemi, R
Fedorisin, J
Feng, A
Filip, P
Finch, E
Fine, V
Fisyak, Y
Gagliardi, CA
Gaillard, L
Gangadharan, DR
Ganti, MS
Garcia-Solis, E
Ghazikhanian, V
Ghosh, P
Gorbunov, YN
Gordon, A
Grebenyuk, O
Grosnick, D
Grube, B
Guertin, SM
Guimaraes, KSFF
Gupta, A
Gupta, N
Guryn, W
Haag, B
Hallman, TJ
Hamed, A
Harris, JW
He, W
Heinz, M
Heppelmann, S
Hippolyte, B
Hirsch, A
Hjort, E
Hoffman, AM
Hoffmann, GW
Hofman, DJ
Hollis, RS
Huang, HZ
Humanic, TJ
Igo, G
Iordanova, A
Jacobs, P
Jacobs, WW
Jakl, P
Jin, F
Jones, PG
Joseph, J
Judd, EG
Kabana, S
Kajimoto, K
Kang, K
Kapitan, J
Kaplan, M
Keane, D
Kechechyan, A
Kettler, D
Khodyrev, VY
Kiryluk, J
Kisiel, A
Klein, SR
Knospe, AG
Kocoloski, A
Koetke, DD
Kopytine, M
Kotchenda, L
Kouchpil, V
Kravtsov, P
Kravtsov, VI
Krueger, K
Krus, M
Kuhn, C
Kumar, L
Kurnadi, P
Lamont, MAC
Landgraf, JM
LaPointe, S
Lauret, J
Lebedev, A
Lednicky, R
Lee, CH
LeVine, MJ
Li, C
Li, Y
Lin, G
Lin, X
Lindenbaum, SJ
Lisa, MA
Liu, F
Liu, H
Liu, J
Liu, L
Ljubicic, T
Llope, WJ
Longacre, RS
Love, WA
Lu, Y
Ludlam, T
Lynn, D
Ma, GL
Ma, YG
Mahapatra, DP
Majka, R
Mall, OI
Mangotra, LK
Manweiler, R
Margetis, S
Markert, C
Matis, HS
Matulenko, YA
McShane, TS
Meschanin, A
Millane, J
Miller, ML
Minaev, NG
Mioduszewski, S
Mischke, A
Mitchell, J
Mohanty, B
Molnar, L
Morozov, DA
Munhoz, MG
Nandi, BK
Nattrass, C
Nayak, TK
Nelson, JM
Nepali, C
Netrakanti, PK
Ng, MJ
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Okada, H
Okorokov, V
Olson, D
Pachr, M
Page, BS
Pal, SK
Pandit, Y
Panebratsev, Y
Pawlak, T
Peitzmann, T
Perevoztchikov, V
Perkins, C
Peryt, W
Phatak, SC
Planinic, M
Pluta, J
Poljak, N
Poskanzer, AM
Potukuchi, BVKS
Prindle, D
Pruneau, C
Pruthi, NK
Putschke, J
Raniwala, R
Raniwala, S
Ray, RL
Reed, R
Ridiger, A
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Rose, A
Roy, C
Ruan, L
Russcher, MJ
Rykov, V
Sahoo, R
Sakrejda, I
Sakuma, T
Salur, S
Sandweiss, J
Sarsour, M
Schambach, J
Scharenberg, RP
Schmitz, N
Seger, J
Selyuzhenkov, I
Seyboth, P
Shabetai, A
Shahaliev, E
Shao, M
Sharma, M
Shi, SS
Shi, XH
Sichtermann, EP
Simon, F
Singaraju, RN
Skoby, MJ
Smirnov, N
Snellings, R
Sorensen, P
Sowinski, J
Spinka, HM
Srivastava, B
Stadnik, A
Stanislaus, TDS
Staszak, D
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Subba, NL
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Timoshenko, S
Tlusty, D
Tokarev, M
Trainor, TA
Tram, VN
Trattner, AL
Trentalange, S
Tribble, RE
Tsai, OD
Ulery, J
Ullrich, T
Underwood, DG
Van Buren, G
van Leeuwen, M
Molen, AMV
Vanfossen, JA
Varma, R
Vasconcelos, GMS
Vasilevski, IM
Vasiliev, AN
Videbaek, F
Vigdor, SE
Viyogi, YP
Vokal, S
Voloshin, SA
Wada, M
Waggoner, WT
Wang, F
Wang, G
Wang, JS
Wang, Q
Wang, X
Wang, XL
Wang, Y
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wissink, SW
Witt, R
Wu, Y
Xu, N
Xu, QH
Xu, Y
Xu, Z
Yepes, P
Yoo, IK
Yue, Q
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, H
Zhang, S
Zhang, WM
Zhang, Y
Zhang, ZP
Zhao, Y
Zhong, C
Zhou, J
Zoulkarneev, R
Zoulkarneeva, Y
Zuo, JX
AF Abelev, B. I.
Aggarwal, M. M.
Ahammed, Z.
Anderson, B. D.
Arkhipkin, D.
Averichev, G. S.
Bai, Y.
Balewski, J.
Barannikova, O.
Barnby, L. S.
Baudot, J.
Baumgart, S.
Beavis, D. R.
Bellwied, R.
Benedosso, F.
Betts, R. R.
Bhardwaj, S.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Biritz, B.
Bland, L. C.
Bombara, M.
Bonner, B. E.
Botje, M.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bruna, E.
Bueltmann, S.
Burton, T. P.
Bystersky, M.
Cai, X. Z.
Caines, H.
Sanchez, M. Calderon De la Barca
Callner, J.
Catu, O.
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chajecki, Z.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Cheng, J.
Cherney, M.
Chikanian, A.
Choi, K. E.
Christie, W.
Chung, S. U.
Clarke, R. F.
Codrington, M. J. M.
Coffin, J. P.
Cormier, T. M.
Cosentino, M. R.
Cramer, J. G.
Crawford, H. J.
Das, D.
Dash, S.
Daugherity, M.
De Silva, C.
de Moura, M. M.
Dedovich, T. G.
DePhillips, M.
Derevschikov, A. A.
de Souza, R. Derradi
Didenko, L.
Djawotho, P.
Dogra, S. M.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Du, F.
Dunlop, J. C.
Mazumdar, M. R. Dutta
Edwards, W. R.
Efimov, L. G.
Elhalhuli, E.
Elnimr, M.
Emelianov, V.
Engelage, J.
Eppley, G.
Erazmus, B.
Estienne, M.
Eun, L.
Fachini, P.
Fatemi, R.
Fedorisin, J.
Feng, A.
Filip, P.
Finch, E.
Fine, V.
Fisyak, Y.
Gagliardi, C. A.
Gaillard, L.
Gangadharan, D. R.
Ganti, M. S.
Garcia-Solis, E.
Ghazikhanian, V.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Grebenyuk, O.
Grosnick, D.
Grube, B.
Guertin, S. M.
Guimaraes, K. S. F. F.
Gupta, A.
Gupta, N.
Guryn, W.
Haag, B.
Hallman, T. J.
Hamed, A.
Harris, J. W.
He, W.
Heinz, M.
Heppelmann, S.
Hippolyte, B.
Hirsch, A.
Hjort, E.
Hoffman, A. M.
Hoffmann, G. W.
Hofman, D. J.
Hollis, R. S.
Huang, H. Z.
Humanic, T. J.
Igo, G.
Iordanova, A.
Jacobs, P.
Jacobs, W. W.
Jakl, P.
Jin, F.
Jones, P. G.
Joseph, J.
Judd, E. G.
Kabana, S.
Kajimoto, K.
Kang, K.
Kapitan, J.
Kaplan, M.
Keane, D.
Kechechyan, A.
Kettler, D.
Khodyrev, V. Yu.
Kiryluk, J.
Kisiel, A.
Klein, S. R.
Knospe, A. G.
Kocoloski, A.
Koetke, D. D.
Kopytine, M.
Kotchenda, L.
Kouchpil, V.
Kravtsov, P.
Kravtsov, V. I.
Krueger, K.
Krus, M.
Kuhn, C.
Kumar, L.
Kurnadi, P.
Lamont, M. A. C.
Landgraf, J. M.
LaPointe, S.
Lauret, J.
Lebedev, A.
Lednicky, R.
Lee, C-H.
LeVine, M. J.
Li, C.
Li, Y.
Lin, G.
Lin, X.
Lindenbaum, S. J.
Lisa, M. A.
Liu, F.
Liu, H.
Liu, J.
Liu, L.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Love, W. A.
Lu, Y.
Ludlam, T.
Lynn, D.
Ma, G. L.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mall, O. I.
Mangotra, L. K.
Manweiler, R.
Margetis, S.
Markert, C.
Matis, H. S.
Matulenko, Yu. A.
McShane, T. S.
Meschanin, A.
Millane, J.
Miller, M. L.
Minaev, N. G.
Mioduszewski, S.
Mischke, A.
Mitchell, J.
Mohanty, B.
Molnar, L.
Morozov, D. A.
Munhoz, M. G.
Nandi, B. K.
Nattrass, C.
Nayak, T. K.
Nelson, J. M.
Nepali, C.
Netrakanti, P. K.
Ng, M. J.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Okada, H.
Okorokov, V.
Olson, D.
Pachr, M.
Page, B. S.
Pal, S. K.
Pandit, Y.
Panebratsev, Y.
Pawlak, T.
Peitzmann, T.
Perevoztchikov, V.
Perkins, C.
Peryt, W.
Phatak, S. C.
Planinic, M.
Pluta, J.
Poljak, N.
Poskanzer, A. M.
Potukuchi, B. V. K. S.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Putschke, J.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Reed, R.
Ridiger, A.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Rose, A.
Roy, C.
Ruan, L.
Russcher, M. J.
Rykov, V.
Sahoo, R.
Sakrejda, I.
Sakuma, T.
Salur, S.
Sandweiss, J.
Sarsour, M.
Schambach, J.
Scharenberg, R. P.
Schmitz, N.
Seger, J.
Selyuzhenkov, I.
Seyboth, P.
Shabetai, A.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, S. S.
Shi, X-H.
Sichtermann, E. P.
Simon, F.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Snellings, R.
Sorensen, P.
Sowinski, J.
Spinka, H. M.
Srivastava, B.
Stadnik, A.
Stanislaus, T. D. S.
Staszak, D.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Subba, N. L.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Symons, T. J. M.
de Toledo, A. Szanto
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Timoshenko, S.
Tlusty, D.
Tokarev, M.
Trainor, T. A.
Tram, V. N.
Trattner, A. L.
Trentalange, S.
Tribble, R. E.
Tsai, O. D.
Ulery, J.
Ullrich, T.
Underwood, D. G.
Van Buren, G.
van Leeuwen, M.
Molen, A. M. Vander
Vanfossen, J. A., Jr.
Varma, R.
Vasconcelos, G. M. S.
Vasilevski, I. M.
Vasiliev, A. N.
Videbaek, F.
Vigdor, S. E.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Waggoner, W. T.
Wang, F.
Wang, G.
Wang, J. S.
Wang, Q.
Wang, X.
Wang, X. L.
Wang, Y.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Wu, Y.
Xu, N.
Xu, Q. H.
Xu, Y.
Xu, Z.
Yepes, P.
Yoo, I-K.
Yue, Q.
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, H.
Zhang, S.
Zhang, W. M.
Zhang, Y.
Zhang, Z. P.
Zhao, Y.
Zhong, C.
Zhou, J.
Zoulkarneev, R.
Zoulkarneeva, Y.
Zuo, J. X.
CA STAR Collaboration
TI Indications of Conical Emission of Charged Hadrons at the BNL
Relativistic Heavy Ion Collider
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID EVENTS
AB Three-particle azimuthal correlation measurements with a high transverse momentum trigger particle are reported for pp, d + Au, and Au + Au collisions at root(NN)-N-S = 200 GeV by the STAR experiment. Dijet structures are observed in pp, d + Au and peripheral Au + Au collisions. An additional structure is observed in central Au + Au data, signaling conical emission of correlated charged hadrons. The conical emission angle is found to be theta = 1.37 +/- 0.02(stat)(-0.07)(+0.06)(syst), independent of p perpendicular to.
C1 [Abelev, B. I.; Barannikova, O.; Betts, R. R.; Callner, J.; Garcia-Solis, E.; Hofman, D. J.; Hollis, R. S.; Iordanova, A.; Suarez, M. C.] Univ Illinois, Chicago, IL 60607 USA.
[Krueger, K.; Spinka, H. M.; Underwood, D. G.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Barnby, L. S.; Bombara, M.; Bueltmann, S.; Burton, T. P.; Elhalhuli, E.; Gaillard, L.; Jones, P. G.; Nelson, J. M.; Timmins, A. R.] Univ Birmingham, Birmingham, W Midlands, England.
[Beavis, D. R.; Bland, L. C.; Christie, W.; Chung, S. U.; DePhillips, M.; Didenko, L.; Dunlop, J. C.; Fachini, P.; Fine, V.; Fisyak, Y.; Gordon, A.; Guryn, W.; Hallman, T. J.; Lamont, M. A. C.; Landgraf, J. M.; Lauret, J.; Lebedev, A.; LeVine, M. J.; Ljubicic, T.; Lu, Y.; Ullrich, T.; Van Buren, G.; Videbaek, F.; Zhang, H.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Crawford, H. J.; Ng, M. J.; Perkins, C.; Trainor, T. A.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Sanchez, M. Calderon De la Barca; Cebra, D.; Das, D.; Drachenberg, J. L.; Draper, J. E.; Haag, B.; Liu, H.; Longacre, R. S.; Love, W. A.; Ludlam, T.; Lynn, D.; Mall, O. I.; Ogawa, A.; Okada, H.; Perevoztchikov, V.; Reed, R.; Romero, J. L.; Ruan, L.; Sorensen, P.; Tang, A. H.; Tang, Z.] Univ Calif Davis, Davis, CA 95616 USA.
[Biritz, B.; Cendejas, R.; Gangadharan, D. R.; Ghazikhanian, V.; Guertin, S. M.; Huang, H. Z.; Igo, G.; Kurnadi, P.; Staszak, D.; Trentalange, S.; Tsai, O. D.; Wang, G.; Whitten, C., Jr.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[de Souza, R. Derradi; Takahashi, J.; Vasconcelos, G. M. S.] Univ Estadual Campinas, Sao Paulo, Brazil.
[Kaplan, M.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
[Cherney, M.; Gorbunov, Y. N.; McShane, T. S.; Seger, J.; Waggoner, W. T.] Creighton Univ, Omaha, NE 68178 USA.
[Bielcik, J.; Bielcikova, J.; Bystersky, M.; Chaloupka, P.; Jakl, P.; Kapitan, J.; Kouchpil, V.; Krus, M.; Pachr, M.; Sumbera, M.; Tlusty, D.] Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic.
[Averichev, G. S.; Dedovich, T. G.; Efimov, L. G.; Fedorisin, J.; Filip, P.; Kechechyan, A.; Panebratsev, Y.; Rogachevskiy, O. V.; Shahaliev, E.; Stadnik, A.; Tokarev, M.; Vokal, S.] Lab High Energy JINR, Dubna, Russia.
[Arkhipkin, D.; Lednicky, R.; Vasilevski, I. M.; Zoulkarneev, R.; Zoulkarneeva, Y.] Particle Phys Lab JINR, Dubna, Russia.
[Dash, S.; Mahapatra, D. P.; Phatak, S. C.; Viyogi, Y. P.] Inst Phys, Bhubaneswar 751005, Orissa, India.
[Heinz, M.; Nandi, B. K.; Varma, R.] Indian Inst Technol, Mumbai 400076, Maharashtra, India.
[Djawotho, P.; He, W.; Jacobs, W. W.; Page, B. S.; Selyuzhenkov, I.; Sowinski, J.; Vigdor, S. E.; Wissink, S. W.] Indiana Univ, Bloomington, IN 47408 USA.
[Baudot, J.; Coffin, J. P.; Estienne, M.; Hippolyte, B.; Kuhn, C.; Shabetai, A.] Inst Rech Subatom, Strasbourg, France.
[Bhasin, A.; Dogra, S. M.; Gupta, A.; Gupta, N.; Mangotra, L. K.; Potukuchi, B. V. K. S.] Univ Jammu, Jammu 180001, India.
[Anderson, B. D.; Bouchet, J.; Joseph, J.; Keane, D.; Kopytine, M.; Margetis, S.; Nepali, C.; Pandit, Y.; Rykov, V.; Subba, N. L.; Vanfossen, J. A., Jr.; Zhang, W. M.] Kent State Univ, Kent, OH 44242 USA.
[Fatemi, R.] Univ Kentucky, Lexington, KY 40506 USA.
[Sun, Z.; Wang, J. S.; Zhan, W.] Inst Modern Phys, Lanzhou, Peoples R China.
[Dong, X.; Edwards, W. R.; Grebenyuk, O.; Hjort, E.; Jacobs, P.; Kiryluk, J.; Klein, S. R.; Matis, H. S.; Odyniec, G.; Olson, D.; Poskanzer, A. M.; Ritter, H. G.; Rose, A.; Sakrejda, I.; Salur, S.; Sichtermann, E. P.; Subba, N. L.; Symons, T. J. M.; Thomas, J. H.; Tram, V. N.; Wieman, H.; Xu, N.; Xu, Q. H.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Balewski, J.; Hoffman, A. M.; Kocoloski, A.; Millane, J.; Miller, M. L.; Sakuma, T.; Surrow, B.] MIT, Cambridge, MA 02139 USA.
[Schmitz, N.; Seyboth, P.; Simon, F.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Bhardwaj, S.; Molen, A. M. Vander; Westfall, G. D.] Michigan State Univ, E Lansing, MI 48824 USA.
[Brandin, A. V.; Emelianov, V.; Kotchenda, L.; Kravtsov, P.; Okorokov, V.; Ridiger, A.; Strikhanov, M.; Timoshenko, S.] Moscow Engn Phys Inst, Moscow 115409, Russia.
[Lindenbaum, S. J.] CUNY City Coll, New York, NY 10031 USA.
[Bai, Y.; Benedosso, F.; Botje, M.; Braidot, E.; Mischke, A.; Peitzmann, T.; Russcher, M. J.; Snellings, R.; van Leeuwen, M.] NIKHEF, Amsterdam, Netherlands.
[Bai, Y.; Benedosso, F.; Botje, M.; Braidot, E.; Mischke, A.; Peitzmann, T.; Russcher, M. J.; Snellings, R.; van Leeuwen, M.] Univ Utrecht, Amsterdam, Netherlands.
[Chajecki, Z.; Humanic, T. J.; Kisiel, A.; Lisa, M. A.] Ohio State Univ, Columbus, OH 43210 USA.
[Aggarwal, M. M.; Bhati, A. K.; Kumar, L.; Pruthi, N. K.] Panjab Univ, Chandigarh 160014, India.
[Eun, L.; Heppelmann, S.] Penn State Univ, University Pk, PA 16802 USA.
[Derevschikov, A. A.; Khodyrev, V. Yu.; Kravtsov, V. I.; Matulenko, Yu. A.; Meschanin, A.; Minaev, N. G.; Morozov, D. A.; Nogach, L. V.; Nurushev, S. B.; Vasiliev, A. N.] Inst High Energy Phys, Protvino, Russia.
[Hirsch, A.; Molnar, L.; Netrakanti, P. K.; Scharenberg, R. P.; Skoby, M. J.; Srivastava, B.; Stringfellow, B.; Tarnowsky, T.; Ulery, J.; Wang, Q.] Purdue Univ, W Lafayette, IN 47907 USA.
[Choi, K. E.; Grube, B.; Lee, C-H.; Yoo, I-K.] Pusan Natl Univ, Pusan 609735, South Korea.
[Raniwala, R.; Raniwala, S.] Univ Rajasthan, Jaipur 302004, Rajasthan, India.
[Bonner, B. E.; Eppley, G.; Liu, J.; Llope, W. J.; Mitchell, J.; Roberts, J. B.; Yepes, P.; Zhou, J.] Rice Univ, Houston, TX 77251 USA.
[Cosentino, M. R.; de Moura, M. M.; Guimaraes, K. S. F. F.; Munhoz, M. G.; Suaide, A. A. P.; de Toledo, A. Szanto] Univ Sao Paulo, Sao Paulo, Brazil.
[Chen, H. F.; Li, C.; Lu, Y.; Shao, M.; Sun, Y.; Tang, Z.; Wang, X. L.; Xu, Y.; Zhang, Y.; Zhang, Z. P.; Zhao, Y.] Univ Sci & Technol China, Hefei 230026, Peoples R China.
[Cai, X. Z.; Chen, J. H.; Jin, F.; Ma, G. L.; Ma, Y. G.; Shi, X-H.; Tian, J.; Zhang, S.; Zhong, C.; Zuo, J. X.] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
[Erazmus, B.; Kabana, S.; Roy, C.; Sahoo, R.] SUBATECH, Nantes, France.
[Cervantes, M. C.; Clarke, R. F.; Codrington, M. J. M.; Drachenberg, J. L.; Gagliardi, C. A.; Hamed, A.; Mioduszewski, S.; Sarsour, M.; Tribble, R. E.] Texas A&M Univ, College Stn, TX 77843 USA.
[Daugherity, M.; Hoffmann, G. W.; Kajimoto, K.; Markert, C.; Ray, R. L.; Schambach, J.; Thein, D.; Wada, M.] Univ Texas Austin, Austin, TX 78712 USA.
[Cheng, J.; Kang, K.; Li, Y.; Wang, X.; Wang, Y.; Yue, Q.] Tsinghua Univ, Beijing 100084, Peoples R China.
[Witt, R.] USN Acad, Annapolis, MD 21402 USA.
[Grosnick, D.; Koetke, D. D.; Manweiler, R.; Stanislaus, T. D. S.; Webb, J. C.] Valparaiso Univ, Valparaiso, IN 46383 USA.
[Ahammed, Z.; Chattopadhyay, S.; Mazumdar, M. R. Dutta; Ganti, M. S.; Ghosh, P.; Mohanty, B.; Nayak, T. K.; Pal, S. K.; Singaraju, R. N.] Ctr Variable Energy Cyclotron, Kolkata 700064, India.
[Pawlak, T.; Peryt, W.; Pluta, J.; Zawisza, M.; Zbroszczyk, H.] Warsaw Univ Technol, Warsaw, Poland.
[Bichsel, H.; Cramer, J. G.; Kettler, D.; Prindle, D.; Trainor, T. A.] Univ Washington, Seattle, WA 98195 USA.
[Bellwied, R.; Cormier, T. M.; De Silva, C.; Elnimr, M.; LaPointe, S.; Pruneau, C.; Sharma, M.; Voloshin, S. A.] Wayne State Univ, Detroit, MI 48201 USA.
[Chen, J. Y.; Feng, A.; Lin, G.; Liu, F.; Liu, L.; Shi, S. S.; Wu, Y.] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Baumgart, S.; Bruna, E.; Caines, H.; Catu, O.; Chikanian, A.; Du, F.; Finch, E.; Harris, J. W.; Knospe, A. G.; Lin, G.; Majka, R.; Nattrass, C.; Sandweiss, J.; Smirnov, N.] Yale Univ, New Haven, CT 06520 USA.
[Planinic, M.; Poljak, N.] Univ Zagreb, HR-10002 Zagreb, Croatia.
RP Abelev, BI (reprint author), Univ Illinois, Chicago, IL 60607 USA.
RI Barnby, Lee/G-2135-2010; Strikhanov, Mikhail/P-7393-2014; Dogra, Sunil
/B-5330-2013; Mischke, Andre/D-3614-2011; Takahashi, Jun/B-2946-2012;
Planinic, Mirko/E-8085-2012; Peitzmann, Thomas/K-2206-2012; Witt,
Richard/H-3560-2012; Voloshin, Sergei/I-4122-2013; Pandit,
Yadav/I-2170-2013; Lednicky, Richard/K-4164-2013; Cosentino,
Mauro/L-2418-2014; Sumbera, Michal/O-7497-2014; Fornazier Guimaraes,
Karin Silvia/H-4587-2016; Chaloupka, Petr/E-5965-2012; Nattrass,
Christine/J-6752-2016; Derradi de Souza, Rafael/M-4791-2013; Suaide,
Alexandre/L-6239-2016; Inst. of Physics, Gleb Wataghin/A-9780-2017;
Okorokov, Vitaly/C-4800-2017; Ma, Yu-Gang/M-8122-2013;
OI Barnby, Lee/0000-0001-7357-9904; Strikhanov,
Mikhail/0000-0003-2586-0405; Takahashi, Jun/0000-0002-4091-1779;
Peitzmann, Thomas/0000-0002-7116-899X; Pandit,
Yadav/0000-0003-2809-7943; Cosentino, Mauro/0000-0002-7880-8611;
Sumbera, Michal/0000-0002-0639-7323; van Leeuwen,
Marco/0000-0002-5222-4888; Fornazier Guimaraes, Karin
Silvia/0000-0003-0578-9533; Nattrass, Christine/0000-0002-8768-6468;
Derradi de Souza, Rafael/0000-0002-2084-7001; Suaide,
Alexandre/0000-0003-2847-6556; Okorokov, Vitaly/0000-0002-7162-5345; Ma,
Yu-Gang/0000-0002-0233-9900; Bhasin, Anju/0000-0002-3687-8179
FU RHIC Operations Group; RCF at BNL; NERSC Center at LBNL; Open Science
Grid consortium; Offices of NP and HEP within the U. S. DOE Office of
Science; U. S. NSF; Sloan Foundation; DFG Excellence Cluster EXC153 of
Germany; CNRS/IN2P3; RA; RPL; EMN of France; STFC; EPSRC of the United
Kingdom; FAPESP of Brazil; Russian Ministry of Sci. and Tech.; NNSFC;
CAS; MoST; MoE of China; IRP; GA of the Czech Republic; FOM of the
Netherlands; DAE; DST; CSIR of the Government of India; Swiss NSF;
Polish State Committee for Scientific Research; Korea Sci.Eng.
Foundation
FX We thank the RHIC Operations Group and RCF at BNL, and the NERSC Center
at LBNL and the resources provided by the Open Science Grid consortium
for their support. This work was supported in part by the Offices of NP
and HEP within the U. S. DOE Office of Science, the U. S. NSF, the Sloan
Foundation, the DFG Excellence Cluster EXC153 of Germany, CNRS/IN2P3,
RA, RPL, and EMN of France, STFC and EPSRC of the United Kingdom, FAPESP
of Brazil, the Russian Ministry of Sci. and Tech., the NNSFC, CAS, MoST,
and MoE of China, IRP and GA of the Czech Republic, FOM of the
Netherlands, DAE, DST, and CSIR of the Government of India, Swiss NSF,
the Polish State Committee for Scientific Research, and the Korea
Sci.&Eng. Foundation.
NR 27
TC 84
Z9 85
U1 0
U2 15
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 6
PY 2009
VL 102
IS 5
AR 052302
DI 10.1103/PhysRevLett.102.052302
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 404PV
UT WOS:000263166400021
PM 19257508
ER
PT J
AU Cywinski, L
Witzel, WM
Das Sarma, S
AF Cywinski, Lukasz
Witzel, Wayne M.
Das Sarma, S.
TI Electron Spin Dephasing due to Hyperfine Interactions with a Nuclear
Spin Bath
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID QUANTUM DOTS; DECOHERENCE
AB We investigate pure dephasing decoherence (free induction decay and spin echo) of a spin qubit interacting with a nuclear spin bath. While for infinite magnetic field B the only decoherence mechanism is spectral diffusion due to dipolar flip-flops of nuclear spins, with decreasing B the hyperfine-mediated interactions between the nuclear spins become important. We give a theory of decoherence due to these interactions which takes advantage of their long-range nature. For a thermal uncorrelated bath we show that our theory is applicable down to B similar to 10 mT, allowing for comparison with recent experiments in GaAs quantum dots.
C1 [Cywinski, Lukasz; Das Sarma, S.] Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA.
[Witzel, Wayne M.] USN, Res Lab, Washington, DC 20375 USA.
RP Cywinski, L (reprint author), Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA.
RI Cywinski, Lukasz/E-5348-2010; Das Sarma, Sankar/B-2400-2009
OI Cywinski, Lukasz/0000-0002-0162-7943; Das Sarma,
Sankar/0000-0002-0439-986X
FU LPS-NSA
FX We thank W. A. Coish and A. Shabaev for discussions. This work is
supported by LPS-NSA.
NR 25
TC 187
Z9 187
U1 1
U2 15
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 6
PY 2009
VL 102
IS 5
AR 057601
DI 10.1103/PhysRevLett.102.057601
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 404PV
UT WOS:000263166400066
PM 19257553
ER
PT J
AU Bermudez, VM
AF Bermudez, V. M.
TI Computational Study of Environmental Effects in the Adsorption of DMMP,
Sarin, and VX on gamma-Al2O3: Photolysis and Surface Hydroxylation
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Review
ID QUANTUM-CHEMICAL METHODS; GAMMA-ALUMINA SURFACES; UV-LIGHT IRRADIATION;
WARFARE AGENT-VX; DIMETHYL METHYLPHOSPHONATE; AB-INITIO; NANOSIZE AL2O3;
HYDROGEN-BONDS; METAL-OXIDES; NERVE AGENTS
AB The adsorption of the chemical warfare agent simulant dimethyl methylphosphonate (DMMP) and the real agents Sarin and VX on the gamma-Al2O3 Surface has been studied using density functional theory. The focus is primarily on two different environmental effects, namely, surface hydroxylation and photoexcitation due to terrestrial solar radiation. Cluster models for the hydroxylated surface have been examined in detail, focusing on the chemical and electronic structure. The energy for formation via dissociative adsorption of H2O2 the density of states of the occupied cluster orbitals and the OH deprotonation energies have been compared with results from two-dimensionally periodic slab calculations and, where available. with experimental data. For all three species, adsorption on an OH-free surface occurs via an Al(T-d)-O=P dative bond to an unsaturated tetrahedral AI(T-d) site. For the hydroxylated surface, OH sites which are 3-fold coordinated to Al are more reactive than one-fold coordinated sites, in agreement with experiment. In hydrogen-bond formation, the phosphonyl O atom is favored over other active centers (e.g., an alkoxy O atom); however, dative bonding, remains the most stable mode of adsorption when OH-free Al(T-d) sites are available. The tertiary amine group in VX is found to be sufficiently basic to e extract an H+ from an acidic OH site. Even on a fully-OH-covered surface, only a single OH-O=P bond is formed, together with weaker CH-O bonds involving alkyl groups. These have been analyzed using the Atoms in Molecules theory. The threshold for electronic excitation of DMMP or Sarin, either in the gas phase or adsorbed on gamma-Al2O3, is found to occur in the vacuum-ultraviolet, well beyond the upper limit of the terrestrial solar spectrum (similar to 4.5 eV). For VX, on the other hand, the threshold is at similar to 4.2 eV in the gas phase and shifts slightly to the red when adsorbed. Adsorption-induced shifts in the threshold transition energies have been analyzed in terms of those in the initial and final states.
C1 USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
RP Bermudez, VM (reprint author), USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
EM victor.bermudez@nrl.navy.mil
FU Defense Threat Reduction Agency (DTRA)
FX This work was supported by the Defense Threat Reduction Agency (DTRA).
Computer facilities were provided by the Naval Research Laboratory and
by the DOD High-Performance Computing Modernization Program at the
AFRL-MSRC, Wright-Patterson AFB. S.C. Badescu is thanked for help with
the XAIM installation. J. C. Baum is thanked for helpful discussion on
solvent effects in molecular electronic spectra. E. V. Patterson is
thanked for providing the optimized structure for free VX in advance of
publication and for helpful discussions on VX isomerization, and D. C.
Sorescu is thanked for helpful communications regarding geometry
optimization. Communications with H. P. Pinto concerning the structure
of gamma-Al2O3 are gratefully acknowledged.
NR 109
TC 37
Z9 39
U1 6
U2 42
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD FEB 5
PY 2009
VL 113
IS 5
BP 1917
EP 1930
DI 10.1021/jp809053u
PG 14
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 400XN
UT WOS:000262902800039
ER
PT J
AU Wang, Z
Montgomery, MT
Dunkerton, TJ
AF Wang, Zhuo
Montgomery, Michael T.
Dunkerton, Timothy J.
TI A dynamically-based method for forecasting tropical cyclogenesis
location in the Atlantic sector using global model products
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID DISTURBANCES; HURRICANES; INTENSE
AB A real-time forecast method is developed for prediction of the tropical cyclogenesis location over the Atlantic using global model operational products. The method is based on the marsupial theory for tropical cyclogenesis proposed in a recent observational study. A moisture front is usually found ahead of the precursor wave trough, which separates the relatively dry air outside of the wave pouch (a region of closed circulation) from the relatively moist air inside the wave pouch. The propagation speed of the pouch can be determined by tracking the propagation of this moisture front, and the intersection of the critical surface and the trough axis pinpoints the predicted genesis location. Using the global model operational products the genesis location can be predicted up to three days in advance with an error less than 200 km, which can provide useful guidance for forecasters and flight planning. Citation: Wang, Z., M. T. Montgomery, and T. J. Dunkerton (2009), A dynamically-based method for forecasting tropical cyclogenesis location in the Atlantic sector using global model products, Geophys. Res. Lett., 36, L03801, doi: 10.1029/2008GL035586.
C1 [Wang, Zhuo; Montgomery, Michael T.; Dunkerton, Timothy J.] USN, Postgrad Sch, Dept Meteorol, Monterey, CA 93943 USA.
[Dunkerton, Timothy J.] NW Res Associates Inc, Bellevue, WA 98007 USA.
RP Wang, Z (reprint author), USN, Postgrad Sch, Dept Meteorol, 589 Dyer Rd, Monterey, CA 93943 USA.
EM zwang@nps.edu
FU National Aeronautics and Space Administration, MIPR [NNG07HU171,
NNH04CC63C]; National Science Foundation [ATM0715426, ATM-0733380];
Office of Naval Research [N001408WR20129]; US Naval Postgraduate School
in Monterey, California
FX This research was supported in part by the National Aeronautics and
Space Administration, MIPR NNG07HU171 and contract NNH04CC63C, the
National Science Foundation grants ATM0715426, ATM-0733380, Office of
Naval Research grant N001408WR20129, and by the US Naval Postgraduate
School in Monterey, California. We especially thank Bob Creasey for
providing us with the GFS operational data, and Russ Elsberry and an
anonymous reviewer for their constructive comments.
NR 12
TC 28
Z9 29
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD FEB 4
PY 2009
VL 36
AR L03801
DI 10.1029/2008GL035586
PG 7
WC Geosciences, Multidisciplinary
SC Geology
GA 404ST
UT WOS:000263174000001
ER
PT J
AU Haynes, JM
L'Ecuyer, TS
Stephens, GL
Miller, SD
Mitrescu, C
Wood, NB
Tanelli, S
AF Haynes, John M.
L'Ecuyer, Tristan S.
Stephens, Graeme L.
Miller, Steven D.
Mitrescu, Cristian
Wood, Norman B.
Tanelli, Simone
TI Rainfall retrieval over the ocean with spaceborne W-band radar
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID MICROWAVE BRIGHTNESS TEMPERATURES; RADIATIVE-TRANSFER EQUATION;
MONTE-CARLO INTEGRATION; MILLIMETER-WAVE RADAR; MELTING-LAYER; SIZE
DISTRIBUTIONS; PRECIPITATION; MODEL; SCATTERING; ALGORITHM
AB A method for retrieving precipitation over the ocean using spaceborne W-band (94 GHz) radar is introduced and applied to the CloudSat Cloud Profiling Radar. The method is most applicable to stratiform-type precipitation. Measurements of radar backscatter from the ocean surface are combined with information about surface wind speed and sea surface temperature to derive the path-integrated attenuation through precipitating cloud systems. The scattering and extinction characteristics of raindrops are modeled using a combination of Mie theory (for raindrops) and the discrete dipole approximation (for ice crystals and melting snow), and a model of the melting layer is implemented to represent the transition between ice and liquid water. Backward Monte Carlo modeling is used to model multiple scattering from precipitating hydrometeors between the radar and ocean surface, which is shown to be significant for precipitation rates exceeding 3-5 mm h(-1), particularly when precipitating ice is present. An uncertainty analysis is presented and the algorithm is applied to near-global CloudSat observations and compared with other near-global precipitation sources. In the tropics, CloudSat tends to underestimate the heaviest precipitation. It is found that in the middle latitudes, however, CloudSat observes precipitation more often and with greater resulting accumulation than other spaceborne sensors.
C1 [Haynes, John M.; L'Ecuyer, Tristan S.; Stephens, Graeme L.; Wood, Norman B.] Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA.
[Miller, Steven D.] Colorado State Univ, Cooperat Inst Res Atmosphere, Ft Collins, CO 80523 USA.
[Mitrescu, Cristian] USN, Res Lab, Monterey, CA 93943 USA.
[Tanelli, Simone] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Haynes, JM (reprint author), Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA.
EM haynes@atmos.colostate.edu; tristan@atmos.colostate.edu;
stephens@atmos.colostate.edu; miller@cira.colostate.edu;
norm@atmos.colostate.edu; simone.tanelli@jpl.nasa.gov
RI L'Ecuyer, Tristan/C-7040-2013; L'Ecuyer, Tristan/E-5607-2012
OI L'Ecuyer, Tristan/0000-0002-7584-4836
FU NASA [NNX07AR97G]; Jet Propulsion Laboratory, California Institute of
technology; National Aeronautics and Space Administration
FX This study was supported partially by NASA grant NNX07AR97G. We wish to
thank Denis O' Brien of Colorado State University for providing the
backward Monte Carlo model used in this study and for his assistance
adapting it for use in the CloudSat configuration. Simone Tanelli's
contribution was performed at the Jet Propulsion Laboratory, California
Institute of technology, under contract with the National Aeronautics
and Space Administration.
NR 45
TC 119
Z9 120
U1 0
U2 23
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD FEB 4
PY 2009
VL 114
AR D00A22
DI 10.1029/2008JD009973
PG 18
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 404TE
UT WOS:000263175100001
ER
PT J
AU Curry, JA
Adams, N
Crum-Cianflone, NF
AF Curry, Jennifer A.
Adams, Nehkonti
Crum-Cianflone, Nancy F.
TI Acute Hepatitis E Virus Infection in an HIV-Infected Person in the
United States
SO ANNALS OF INTERNAL MEDICINE
LA English
DT Letter
C1 [Curry, Jennifer A.; Adams, Nehkonti] USN, Med Ctr, San Diego, CA 92134 USA.
[Crum-Cianflone, Nancy F.] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
RP Curry, JA (reprint author), USN, Med Ctr, San Diego, CA 92134 USA.
FU NIAID NIH HHS [HU0001-05-2-0011]; PHS HHS [HU0001-05-2-0011]
NR 5
TC 24
Z9 24
U1 0
U2 0
PU AMER COLL PHYSICIANS
PI PHILADELPHIA
PA INDEPENDENCE MALL WEST 6TH AND RACE ST, PHILADELPHIA, PA 19106-1572 USA
SN 0003-4819
J9 ANN INTERN MED
JI Ann. Intern. Med.
PD FEB 3
PY 2009
VL 150
IS 3
BP 226
EP 227
PG 2
WC Medicine, General & Internal
SC General & Internal Medicine
GA 402RA
UT WOS:000263029600024
PM 19189925
ER
PT J
AU Zabetakis, D
Loschialpo, P
Smith, D
Dinderman, MA
Dressick, WJ
AF Zabetakis, Dan
Loschialpo, Peter
Smith, Doug
Dinderman, Michael A.
Dressick, Walter J.
TI Direct-Write Patterning Palladium Colloids as a Catalyst for Electroless
Metallization for Microwave Composites
SO LANGMUIR
LA English
DT Article
ID CELLULOSE FIBERS; SURFACE
AB Patterning of metal colloids by inkjet printing on paper is demonstrated as a precursor to electroless metallization. The development of the metal pattern is followed in terms of the conductivity and mass of the metal deposited and is shown to have critical phase behavior. The utility of this technique for large-area microscale patterning is demonstrated. Sample patterns of frequency-selective surface designs were manufactured and shown to conform to computationally modeled expectations in the microwave regime.
C1 [Zabetakis, Dan; Loschialpo, Peter; Smith, Doug; Dinderman, Michael A.; Dressick, Walter J.] USN, Res Lab, Washington, DC USA.
RP Zabetakis, D (reprint author), USN, Res Lab, Washington, DC USA.
NR 17
TC 11
Z9 11
U1 2
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 FEB 3
PY 2009
VL 25
IS 3
BP 1785
EP 1789
DI 10.1021/la803356y
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 399VM
UT WOS:000262827400077
PM 19123909
ER
PT J
AU Alldredge, LMB
Chang, WT
Kirchoefer, SW
Pond, JM
AF Alldredge, L. M. B.
Chang, Wontae
Kirchoefer, Steven W.
Pond, Jeffrey M.
TI Phase transitions and the temperature dependence of the dielectric
properties in tetragonally strained barium strontium titanate films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE barium compounds; dielectric thin films; ferroelectric transitions;
magnesium compounds; permittivity; sputter deposition; strontium
compounds; tensile strength
ID FERROELECTRIC THIN-FILMS; CONSTANT; DIAGRAMS
AB The dielectric properties of sputter-deposited Ba(1-x)Sr(x)TiO(3) (BST) thin films on (001) MgO substrates with in-plane or out-of-plane tetragonal lattice structure distortions were characterized as a function of temperature. A temperature-dependent interpolation calibration technique was developed for increased efficiency of the microwave measurements. The BST films showed significant differences in the ferroelectric phase transition due to lattice distortions with a strong temperature dependence of the in-plane dielectric behavior for films under tensile strain and a weak temperature dependence for films under compressive strain. The experimental data agreed well with theoretical modeling of the BST film strain effect based on Devonshire's theory.
C1 [Alldredge, L. M. B.; Chang, Wontae; Kirchoefer, Steven W.; Pond, Jeffrey M.] USN, Res Lab, Washington, DC 20375 USA.
RP Alldredge, LMB (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM lisa.alldredge@nrl.navy.mil
FU Office of Naval Research; National Research Council Research
Associateship Award
FX This work was supported by the Office of Naval Research. The research
was performed while one of the authors (L.M.B.A.) held a National
Research Council Research Associateship Award.
NR 19
TC 8
Z9 8
U1 3
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 FEB 2
PY 2009
VL 94
IS 5
AR 052904
DI 10.1063/1.3079093
PG 3
WC Physics, Applied
SC Physics
GA 404QB
UT WOS:000263167000045
ER
PT J
AU Terray, A
Ladouceur, HD
Hammond, M
Hart, SJ
AF Terray, Alex
Ladouceur, H. D.
Hammond, Mark
Hart, Sean J.
TI Numerical simulation of an optical chromatographic separator
SO OPTICS EXPRESS
LA English
DT Article
ID PARTICLES; TWEEZERS; MANIPULATION; SPHERES; REGIME; FORCES; CELLS; TRAP;
BEAM; SIZE
AB Optical chromatography achieves microscale optical manipulation through the balance of optical and hydrodynamic forces on micron sized particles entrained in microfluidic flow traveling counter to the propagation of a mildly focused laser beam. The optical pressure force on a particle is specific to each particle's size, shape and refractive index. So far, these properties have been exploited in our lab to concentrate, purify and separate injected samples. But as this method advances into more complex optofluidic systems, a need to better predict behavior is necessary. Here, we present the development and experimental verification of a robust technique to simulate particle trajectories in our optical chromatographic device. We also show how this new tool can be used to gather better qualitative and quantitative understanding in a two component particle separation. (C) 2008 Optical Society of America
C1 [Terray, Alex; Ladouceur, H. D.; Hammond, Mark; Hart, Sean J.] Div Chem, Naval Res Lab, Washington, DC 20375 USA.
RP Hart, SJ (reprint author), Div Chem, Naval Res Lab, Code 6112,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM sean.hart@nrl.navy.mil
FU Naval Research Laboratory (NRL); Defense Threat Reduction Agency (DTRA)
FX The authors would like to acknowledge the Naval Research Laboratory
(NRL) and the Defense Threat Reduction Agency (DTRA) for support of this
research. The authors would also like to thank Dr. Ramagopal Ananth
(NRL), Mr. Richard Stroman (NRL), Dr. Benjamin Gould (ASEE Postdoctoral
Fellow) and Dr. Carl I. D. Newman (Strategic Analysis, Inc.) for
in-depth discussions related to the manuscript.
NR 28
TC 7
Z9 7
U1 0
U2 8
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 FEB 2
PY 2009
VL 17
IS 3
BP 2024
EP 2032
DI 10.1364/OE.17.002024
PG 9
WC Optics
SC Optics
GA 408JX
UT WOS:000263432400092
PM 19189033
ER
PT J
AU Battaglia, MJ
Lenhoff, MW
Ehteshami, JR
Lyman, S
Provencher, MT
Wickiewicz, TL
Warren, RF
AF Battaglia, Michael J., II
Lenhoff, Mark W.
Ehteshami, John R.
Lyman, Stephen
Provencher, Matthew T.
Wickiewicz, Thomas L.
Warren, Russell F.
TI Medial Collateral Ligament Injuries and Subsequent Load on the Anterior
Cruciate Ligament A Biomechanical Evaluation in a Cadaveric Model
SO AMERICAN JOURNAL OF SPORTS MEDICINE
LA English
DT Article
DE anterior cruciate ligament (ACL); medial collateral ligament (MCL);
biomechanics; robotics
ID IN-SITU FORCES; FEMORAL TUNNEL PLACEMENT; KNEE STABILITY; GRAFT
FUNCTION; RECONSTRUCTION; ACL; SENSOR; MCL
AB Background: Numerous studies have documented the effect of complete medial collateral ligament injury on anterior cruciate ligament loads; few have addressed how partial medial collateral ligament disruption affects knee kinematics.
Purpose: To determine knee kinematics and subsequent change in anterior cruciate ligament load in a partial and complete medial collateral ligament injury model.
Study Design: Controlled laboratory study.
Methods: Ten human cadaveric knees were sequentially tested by a robot with the medial collateral ligament intact, in a partial injury model. and in a complete injury model with a universal force-moment sensor measuring system. Tibial translation, rotation, and anterior cruciate ligament load were measured under 3 conditions: anterior load (125 N) valgus load (10 N.m) and internal-external rotation torque (4 N.m; all at 0 degrees and 30 degrees of flextion)
Results: Anterior and posterior translation did not statistically increase with a partial or complete medial collateral ligament injury at 0 degrees and 30 degrees of flexion. In response to a 125 N anterior load. at 0 degrees, the anterior cruciate ligament load increased 8.7% (from 99.5 to 108.2 N; P = .006) in the partial injury and 18.3% (117.7 N; P < .001) in the complete injury; at 30 degrees, anterior cruciate ligament load was increased 123% (from 101.7 to 114.2 N; P = .001) in the partial injury and 20.6% (122.7 N; P < .001) in the complete injury. In response to valgus torque (10 N.m) at 30 degrees, anterior cruciate ligament load was increased 55.3% (30.4 to 47.2 N; P = .044) in the partial injury model and 185% (86.8 N; P = .001) in the complete injury model. In response to internal rotation torque (4 N.m) at 30 degrees, anterior cruciate ligament load was increased 29.3% (27.6 to 35.7 N; P = .001) in the partial injury model and 65.2% (45.6 N; P < .001) in the complete injury model. The amount of internal rotation at 30 degrees of flexion was significantly increased in the complete injury model (22.8%) versus the intact state (19.5 degrees; P < .001)
Conclusion: Partial and complete medial collateral ligament tears significantly increased the load on the anterior cruciate ligament. In a partial tear, the resultant load on the anterior cruciate ligament was increased at 30 degrees of flexion and with valgus load and internal rotation torque.
Clinical Relevance: Patients may need to be protected from valgus and internal rotation forces after anterior cruciate ligament reconstruction in the setting of a concomitant partial medial collateral ligament tear. This information may help clinicians understand the importance of partial injuries of the medial collateral ligament with a combined anterior cruciate ligament injury complex.
C1 [Battaglia, Michael J., II] USN Acad, Annapolis, MD 21402 USA.
[Battaglia, Michael J., II; Lenhoff, Mark W.; Ehteshami, John R.; Lyman, Stephen; Wickiewicz, Thomas L.; Warren, Russell F.] Cornell Univ, Weill Med Coll, Hosp Special Surg, Dept Shoulder & Sports Med, New York, NY 10021 USA.
[Provencher, Matthew T.] USN, Med Ctr, San Diego, CA 92152 USA.
RP Battaglia, MJ (reprint author), USN Acad, 250 Wood Rd, Annapolis, MD 21402 USA.
EM ttags@yahoo.com
NR 36
TC 23
Z9 23
U1 0
U2 11
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 FEB
PY 2009
VL 37
IS 2
BP 305
EP 311
DI 10.1177/0363546508324969
PG 7
WC Orthopedics; Sport Sciences
SC Orthopedics; Sport Sciences
GA 401PO
UT WOS:000262954200010
PM 19098154
ER
PT J
AU Kronmann, KC
Truett, AA
Hale, BR
Crum-Cianflone, NF
AF Kronmann, Karl C.
Truett, April A.
Hale, Braden R.
Crum-Cianflone, Nancy F.
TI Melioidosis after Brief Exposure: A Serologic Survey in US Marines
SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
LA English
DT Article
ID RECRUDESCENT MELIOIDOSIS; CUTANEOUS MELIOIDOSIS; PSEUDOMALLEI;
PERSONNEL; THAILAND; TRAVELER
AB Melioidosis is a disease of protean manifestations caused by the saprophytic gram-negative bacteria, Burkholderia pseudomallei. Most disease occurs among residents of Southeast Asia and Australia, but cases have been reported in returning travelers.(1.2) The degree of risk to travelers for brief visits is unknown. We report a case of melioidosis and the results of an epidemiologic survey among US Marines returning from military exercises on the coast of Thailand.
C1 [Kronmann, Karl C.; Truett, April A.; Hale, Braden R.; Crum-Cianflone, Nancy F.] USN, San Diego Med Ctr, Div Infect Dis, San Diego, CA 92134 USA.
USN, Med Manpower Personnel Training & Educ Command, Bethesda, MD 20084 USA.
USUHS, Infect Dis Clin Res Program, Bethesda, MD USA.
RP Crum-Cianflone, NF (reprint author), USN, San Diego Med Ctr, Div Infect Dis, 34800 Bob Wilson Dr,Ste 5, San Diego, CA 92134 USA.
EM nancy.crum@med.navy.mil
FU NIAID NIH HHS [HU0001-05-2-0011]; PHS HHS [HU0001-05-2-0011]
NR 15
TC 8
Z9 8
U1 0
U2 5
PU AMER SOC TROP MED & HYGIENE
PI MCLEAN
PA 8000 WESTPARK DR, STE 130, MCLEAN, VA 22101 USA
SN 0002-9637
J9 AM J TROP MED HYG
JI Am. J. Trop. Med. Hyg.
PD FEB
PY 2009
VL 80
IS 2
BP 182
EP 184
PG 3
WC Public, Environmental & Occupational Health; Tropical Medicine
SC Public, Environmental & Occupational Health; Tropical Medicine
GA 406RG
UT WOS:000263312000005
PM 19190209
ER
PT J
AU Delehanty, JB
Mattoussi, H
Medintz, IL
AF Delehanty, James B.
Mattoussi, Hedi
Medintz, Igor L.
TI Delivering quantum dots into cells: strategies, progress and remaining
issues
SO ANALYTICAL AND BIOANALYTICAL CHEMISTRY
LA English
DT Review
DE Semiconductor quantum dot; Peptide; Nanoparticle; Endocytosis;
Electroporation; Biosensor; Cellular labeling; Microinjection;
Transfection; Polymer; Fluorescence
ID RESONANCE ENERGY-TRANSFER; IN-VIVO; LIVING CELLS; LIVE CELLS;
INTRACELLULAR DELIVERY; PENETRATING PEPTIDES; CELLULAR UPTAKE;
DRUG-DELIVERY; LONG-TERM; SEMICONDUCTOR NANOCRYSTALS
AB The use of semiconductor quantum dots (QDs) in biological sensing and labeling continues to grow with each year. Current and projected applications include use as fluorescent labels for cellular labeling, intracellular sensors, deep-tissue and tumor imaging agents, sensitizers for photodynamic therapy, and more recently interest has been sparked in using them as vectors for studying nanoparticle-mediated drug delivery. Many of these applications will ultimately require the QDs to undergo targeted intracellular delivery, not only to specific cells, but also to a variety of subcellular compartments and organelles. It is apparent that this issue will be critical in determining the efficacy of using QDs, and indeed a variety of other nanoparticles, for these types of applications. In this review, we provide an overview of the current methods for delivering QDs into cells. Methods that are covered include facilitated techniques such as those that utilize specific peptide sequences or polymer delivery reagents and active methods such as electroporation and microinjection. We critically examine the benefits and liabilities of each strategy and illustrate them with selected examples from the literature. Several important related issues such as QD size and surface coating, methods for QD biofunctionalization, cellular physiology and toxicity are also discussed. Finally, we conclude by providing a perspective of how this field can be expected to develop in the future.
C1 [Delehanty, James B.; Medintz, Igor L.] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
[Mattoussi, Hedi] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
RP Medintz, IL (reprint author), USN, Res Lab, Ctr Biomol Sci & Engn, Code 6900, Washington, DC 20375 USA.
EM igor.medintz@nrl.navy.mil
FU NRL-NSI
FX The authors acknowledge Jennifer Becker and Ilya Elashvilli of the CB
Directorate/Physical S&T Division (ARO/DTRA), ONR, NRL, and the NRL-NSI
for financial support.
NR 102
TC 217
Z9 227
U1 14
U2 153
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 1618-2642
J9 ANAL BIOANAL CHEM
JI Anal. Bioanal. Chem.
PD FEB
PY 2009
VL 393
IS 4
BP 1091
EP 1105
DI 10.1007/s00216-008-2410-4
PG 15
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 404CE
UT WOS:000263127500002
PM 18836855
ER
PT J
AU Clifton, GT
Holmes, JP
Patel, R
Benavides, LC
Gates, JD
Hueman, MT
Mittendorf, EA
Ponniah, S
Peoples, GE
AF Clifton, G. T.
Holmes, J. P.
Patel, R.
Benavides, L. C.
Gates, J. D.
Hueman, M. T.
Mittendorf, E. A.
Ponniah, S.
Peoples, G. E.
TI Use of booster inoculations to sustain the clinical effect of an
adjuvant breast cancer vaccine
SO ANNALS OF SURGICAL ONCOLOGY
LA English
DT Meeting Abstract
C1 [Clifton, G. T.; Benavides, L. C.; Gates, J. D.; Peoples, G. E.] Brooke Army Med Ctr, Ft Sam Houston, TX 78234 USA.
[Patel, R.] Joyce Murtha Breast Care Ctr, Winber, PA USA.
[Holmes, J. P.] USN, Med Ctr, San Diego, CA 92152 USA.
[Hueman, M. T.] Johns Hopkins Univ Hosp, Baltimore, MD 21287 USA.
[Mittendorf, E. A.] UT MD Anderson Canc Ctr, Houston, TX USA.
[Ponniah, S.] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1068-9265
J9 ANN SURG ONCOL
JI Ann. Surg. Oncol.
PD FEB
PY 2009
VL 16
SU 1
BP 58
EP 58
PG 1
WC Oncology; Surgery
SC Oncology; Surgery
GA V16GF
UT WOS:000207857400186
ER
PT J
AU Sivaprakasam, V
Pletcher, T
Tucker, JE
Huston, AL
McGinn, J
Keller, D
Eversole, JD
AF Sivaprakasam, Vasanthi
Pletcher, Timothy
Tucker, John E.
Huston, Alan L.
McGinn, Joseph
Keller, David
Eversole, Jay D.
TI Classification and selective collection of individual aerosol particles
using laser-induced fluorescence
SO APPLIED OPTICS
LA English
DT Article; Proceedings Paper
CT 11th Meeting on Laser Applications to Chemical and Environment Analysis
CY MAR 15-20, 2008
CL St Petersburg, FL
ID PCR; BIOAEROSOLS; SAMPLES; SENSOR; DUST; DNA
AB We describe the development and performance evaluation of a system for optical interrogation, subsequent selection, and collection of individual aerosol particles entrained in an inlet air stream. Elastic scatter and laser-induced fluorescence obtained from single particles on-the-fly provide compositional information for classification criteria. Individual particles could then be selectively electrically charged and captured to a conductive substrate with an electric potential. The optical subsystem also includes a novel two-beam velocimeter to provide accurate downstream timing. Good overall quantitative performance values are reported for particles in the size range of 1-8 mu m at mean rates up to 4 kHz. (C) 2008 Optical Society of America
C1 [Sivaprakasam, Vasanthi; Tucker, John E.; Huston, Alan L.; Eversole, Jay D.] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
[Pletcher, Timothy; McGinn, Joseph; Keller, David] Sarnoff Corp, Princeton, NJ 08540 USA.
RP Sivaprakasam, V (reprint author), USN, Res Lab, Div Opt Sci, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM sivaprak@ccs.nrl.navy.mil
NR 19
TC 20
Z9 20
U1 2
U2 12
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 FEB 1
PY 2009
VL 48
IS 4
BP B126
EP B136
DI 10.1364/AO.48.00B126
PG 11
WC Optics
SC Optics
GA 422FR
UT WOS:000264413400018
PM 19183570
ER
PT J
AU Lowhorn, ND
Wong-Ng, W
Zhang, W
Lu, ZQ
Otani, M
Thomas, E
Green, M
Tran, TN
Dilley, N
Ghamaty, S
Elsner, N
Hogan, T
Downey, AD
Jie, Q
Li, Q
Obara, H
Sharp, J
Caylor, C
Venkatasubramanian, R
Willigan, R
Yang, J
Martin, J
Nolas, G
Edwards, B
Tritt, T
AF Lowhorn, N. D.
Wong-Ng, W.
Zhang, W.
Lu, Z. Q.
Otani, M.
Thomas, E.
Green, M.
Tran, T. N.
Dilley, N.
Ghamaty, S.
Elsner, N.
Hogan, T.
Downey, A. D.
Jie, Q.
Li, Q.
Obara, H.
Sharp, J.
Caylor, C.
Venkatasubramanian, R.
Willigan, R.
Yang, J.
Martin, J.
Nolas, G.
Edwards, B.
Tritt, T.
TI Round-robin measurements of two candidate materials for a Seebeck
coefficient Standard Reference Material (TM)
SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
LA English
DT Article
AB A Standard Reference Material (SRM (TM)) for the Seebeck coefficient is critical for inter-laboratory data comparison and for instrument calibration. To develop this SRM T, we have conducted an international round-robin measurement survey of two candidate materials-undoped Bi(2)Te(3) and constantan (55% Cu and 45% Ni alloy). Measurements were performed in two rounds by twelve laboratories involved in active thermoelectric research using a number of commercial and custom-built measurement systems and techniques. We report the results of these measurements and the statistical analysis performed. Based on this extensive study, we have selected Bi(2)Te(3) as the prototype standard material.
C1 [Lowhorn, N. D.; Wong-Ng, W.; Zhang, W.; Lu, Z. Q.; Otani, M.; Thomas, E.; Green, M.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
[Tran, T. N.] USN, Ctr Surface Warfare, Bethesda, MD 20817 USA.
[Dilley, N.] Quantum Design, San Diego, CA 92121 USA.
[Ghamaty, S.; Elsner, N.] Hi Z Technol Inc, San Diego, CA 92126 USA.
[Hogan, T.; Downey, A. D.] Michigan State Univ, E Lansing, MI 48824 USA.
[Jie, Q.; Li, Q.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Obara, H.] Adv Inst Sci & Technol, Ibaraki, Japan.
[Sharp, J.] Marlow Ind Inc, Dallas, TX 75238 USA.
[Caylor, C.; Venkatasubramanian, R.] Res Triangle Inst, Res Triangle Pk, NC 27709 USA.
[Willigan, R.] United Technol Corp, E Hartford, CT 06108 USA.
[Yang, J.] Gen Motors R&D Ctr, Warren, MI 48090 USA.
[Martin, J.; Nolas, G.] Univ S Florida, Dept Phys, Tampa, FL 33620 USA.
[Edwards, B.; Tritt, T.] Clemson Univ, Dept Phys, Clemson, SC 29634 USA.
RP Wong-Ng, W (reprint author), Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
EM winnie.wong-ng@nist.gov
RI Yang, Jihui/A-3109-2009; Jie, Qing/H-3780-2011; Zhang,
Weiping/C-6158-2014; Jie, Qing/N-8673-2013
NR 4
TC 15
Z9 15
U1 0
U2 18
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0947-8396
J9 APPL PHYS A-MATER
JI Appl. Phys. A-Mater. Sci. Process.
PD FEB
PY 2009
VL 94
IS 2
BP 231
EP 234
DI 10.1007/s00339-008-4876-5
PG 4
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 377NE
UT WOS:000261257100003
ER
PT J
AU Gallagher, TQ
Schroeder, AA
AF Gallagher, Thomas Q.
Schroeder, Ashley A.
TI Pathology Quiz Case 1 Angiomyoma of the lacrimal drainage apparatus
(LDA)
SO ARCHIVES OF OTOLARYNGOLOGY-HEAD & NECK SURGERY
LA English
DT Editorial Material
ID VASCULAR LEIOMYOMA; TUMORS
C1 [Gallagher, Thomas Q.; Schroeder, Ashley A.] USN, Ctr Med, Portsmouth, VA USA.
RP Gallagher, TQ (reprint author), USN, Ctr Med, Portsmouth, VA USA.
NR 7
TC 1
Z9 2
U1 0
U2 0
PU AMER MEDICAL ASSOC
PI CHICAGO
PA 515 N STATE ST, CHICAGO, IL 60610-0946 USA
SN 0886-4470
J9 ARCH OTOLARYNGOL
JI Arch. Otolaryngol. Head Neck Surg.
PD FEB
PY 2009
VL 135
IS 2
BP 216
EP +
PG 3
WC Otorhinolaryngology; Surgery
SC Otorhinolaryngology; Surgery
GA 407QQ
UT WOS:000263379800020
PM 19221254
ER
PT J
AU Fleming, J
Mahoney, J
Carlson, E
Engebretson, J
AF Fleming, John
Mahoney, Jane
Carlson, Elizabeth
Engebretson, Joan
TI An Ethnographic Approach to Interpreting a Mental Illness Photovoice
Exhibit
SO ARCHIVES OF PSYCHIATRIC NURSING
LA English
DT Article
ID FAMILY; DEPRESSION; ETHICS; PEOPLE; HEALTH; CHILD; CARE
AB The aim of this study was to explore the use of photovoice as an innovative methodology for understanding aspects of the mental illness experience. Applied ethnographic methods were used to examine 15 photographs and accompanying narratives from a mental illness photovoice exhibit. Analysis occurred within and across cases, resulting in individual case studies and a thematic description of the narratives. Suffering, stigma, and loss of identity were found at the center of this rendering of mental illness experience. The findings suggest that a photovoice project offers a useful lens from which to examine experiences associated with living with mental illness. (c) 2009 Elsevier Inc. All rights reserved.
C1 [Mahoney, Jane] Menninger Clin, Houston, TX 77080 USA.
Univ Texas Hlth Sci Ctr Houston, Sch Nursing, Houston, TX USA.
USN, Naval Hosp Camp Pendleton, Camp Pendleton, CA USA.
Mennonite Coll Nursing, Normal, IL USA.
RP Mahoney, J (reprint author), Menninger Clin, 2801 Gessner Rd, Houston, TX 77080 USA.
EM john.fleming@med.navy.mil; jmahoney@menninger.edu;
elizabeth.carlson@insightbb.com; joan.c.engebretson@uth.tmc.edu
NR 39
TC 12
Z9 13
U1 1
U2 8
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 0883-9417
J9 ARCH PSYCHIAT NURS
JI Arch. Psychiatr. Nurs.
PD FEB
PY 2009
VL 23
IS 1
BP 16
EP 24
DI 10.1016/j.apnu.2008.02.008
PG 9
WC Nursing; Psychiatry
SC Nursing; Psychiatry
GA 412MR
UT WOS:000263729400004
PM 19216984
ER
PT J
AU Dyer, KK
Cornwell, TJ
Maddalena, RJ
AF Dyer, K. K.
Cornwell, T. J.
Maddalena, R. J.
TI 1.4 GHz HIGH-RESOLUTION FLUX-ACCURATE IMAGES OF SN 1006
SO ASTRONOMICAL JOURNAL
LA English
DT Article
DE ISM: individual (SN1006); radio continuum: ISM; supernova remnants
ID SUPERNOVA-REMNANTS; X-RAY; RADIO; ALGORITHM; SN-1006; DECONVOLUTION;
EMISSION; MAXIMUM; ARRAYS
AB We present interferometric+single-dish images, constructed from the Green Bank Telescope (GBT) and VLA observations, of the supernova remnant SN 1006. The image was created using a Multiscale CLEAN algorithm in conjunction with a novel approach for correcting the effect of the non-coplanar baselines. We demonstrate that integrating with a single dish to the confusion limit of the highest resolution interferometric element is not required. Instead, the noise in the map is limited by the signal-to-noise ratio in each observation. The noise in the combined map at the full resolution is dominated by uncertainties in the VLA data, not by uncertainties in our short GBT observation. The resulting image is a significant improvement over images missing short spacing information, and paves the way for future joint GBT+VLA proposals that need to accurately image objects ranging from galaxies to H II regions.
C1 [Dyer, K. K.] USN, Res Lab, Washington, DC 20375 USA.
[Cornwell, T. J.] Natl Radio Astron Observ, Socorro, NM 87801 USA.
[Maddalena, R. J.] Natl Radio Astron Observ, Green Bank, WV USA.
RP Dyer, KK (reprint author), USN, Res Lab, Code 7213,4555 Overlook Rd, Washington, DC 20375 USA.
EM Kristy.Dyer@nrl.navy.mil; tcornwel@aoc.nrao.edu; rmaddale@nrao.edu
FU National Science Foundation Astronomy; Astrophysics Postdoctoral
Fellowship14 [AST 01-03879]; National Academy of Sciences; Office of
Naval Research
FX While working on this paper K. K. D. was supported by a National Science
Foundation Astronomy and Astrophysics Postdoctoral Fellowship14 under
award AST 01-03879 and by the National Academy of Sciences through a
National Research Council Fellowship at the Naval Research Laboratory.
Basic Research in Radio Interferometry at the Naval Research Laboratory
is supported by the Office of Naval Research.
NR 27
TC 8
Z9 8
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-6256
J9 ASTRON J
JI Astron. J.
PD FEB
PY 2009
VL 137
IS 2
BP 2956
EP 2967
DI 10.1088/0004-6256/137/2/2956
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 400WV
UT WOS:000262901000002
ER
PT J
AU Mason, BD
Hartkopf, WI
Gies, DR
Henry, TJ
Helsel, JW
AF Mason, Brian D.
Hartkopf, William I.
Gies, Douglas R.
Henry, Todd J.
Helsel, John W.
TI THE HIGH ANGULAR RESOLUTION MULTIPLICITY OF MASSIVE STARS
SO ASTRONOMICAL JOURNAL
LA English
DT Review
DE binaries: general; binaries: visual; stars: early-type; stars:
individual (iota Ori, delta Ori, delta Sco); techniques: interferometric
ID ICCD SPECKLE OBSERVATIONS; HUBBLE-SPACE-TELESCOPE; 15 VISUAL BINARIES;
LUNAR OCCULTATION SYSTEMS; ORION TRAPEZIUM CLUSTER; OB RUNAWAY STARS;
ORBITAL ELEMENTS; SPECTROSCOPIC BINARY; INTERFEROMETRIC MEASUREMENTS;
CD-ROM
AB We present the results of a speckle interferometric survey of Galactic massive stars that complements and expands upon a similar survey made over a decade ago. The speckle observations were made with the Kitt Peak National Observatory and Cerro Tololo Inter-American Observatory 4 m telescopes and USNO speckle camera, and they are sensitive to the detection of binaries in the angular separation regime between 0.'' 03 and 5 '' with relatively bright companions (Delta V < 3). We report on the discovery of companions to 14 OB stars. In total we resolved companions of 41 of 385 O-stars (11%), 4 of 37 Wolf-Rayet stars (11%), and 89 of 139 B-stars (64%; an enriched visual binary sample that we selected for future orbital determinations). We made a statistical analysis of the binary frequency among the subsample that are listed in the Galactic O Star Catalog by compiling published data on other visual companions detected through adaptive optics studies and/or noted in the Washington Double Star Catalog and by collecting published information on radial velocities and spectroscopic binaries. We find that the binary frequency is much higher among O-stars in clusters and associations compared to the numbers for field and runaway O-stars, consistent with predictions for the ejection processes for runaway stars. We present a first orbit for the O-star delta Orionis; a linear solution of the close, apparently optical, companion of the Ostar. Orionis; and an improved orbit of the Be star delta Scorpii. Finally, we list astrometric data for another 249 resolved and 221 unresolved targets that are lower mass stars that we observed for various other science programs.
C1 [Mason, Brian D.; Hartkopf, William I.] USN Observ, Washington, DC 20392 USA.
[Gies, Douglas R.; Henry, Todd J.] Georgia State Univ, Dept Phys & Astron, Ctr High Angular Resolut Astron, Atlanta, GA 30302 USA.
[Helsel, John W.] Furman Univ, Dept Phys, Greenville, SC 29613 USA.
RP Mason, BD (reprint author), USN Observ, 3450 Massachusetts Ave NW, Washington, DC 20392 USA.
EM bdm@usno.navy.mil; wih@usno.navy.mil; gies@chara.gsu.edu;
thenry@chara.gsu.edu; john.helsel@furman.edu
NR 160
TC 178
Z9 179
U1 0
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-6256
J9 ASTRON J
JI Astron. J.
PD FEB
PY 2009
VL 137
IS 2
BP 3358
EP 3377
DI 10.1088/0004-6256/137/2/3358
PG 20
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 400WV
UT WOS:000262901000033
ER
PT J
AU Young, PR
Watanabe, T
Hara, H
Mariska, JT
AF Young, P. R.
Watanabe, T.
Hara, H.
Mariska, J. T.
TI High-precision density measurements in the solar corona I. Analysis
methods and results for Fe XII and Fe XIII
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE Sun: corona; Sun: UV radiation
ID ULTRAVIOLET IMAGING SPECTROMETER; ELECTRON-IMPACT EXCITATION; PROTON
COLLISIONAL EXCITATION; EXTREME-ULTRAVIOLET; EMISSION-LINES;
ACTIVE-REGION; ATOMIC DATABASE; QUIET-SUN; HINODE; TEMPERATURE
AB Aims. The EUV Imaging Spectrometer (EIS) instrument on board the Hinode satellite has access to some of the best coronal density diagnostics, and the high sensitivity of the instrument now allows electron number density, N(e), measurements to an unprecedented precision of up to +/-5% in active regions. This paper gives a thorough overview of data analysis issues for the best diagnostics of Fe XII and Fe XIII and assesses the accuracy of the measurements.
Methods. Two density diagnostics each from Fe XII (lambda 186.88/lambda 195.12 and lambda 196.64/lambda 195.12) and Fe XIII (lambda 196.54/lambda 202.04 and lambda 203.82/lambda 202.04) are analysed in two active region datasets from 2007 May 3 and 6 that yield densities in the range 8.5 <= log (N(e)/cm(-3)) <= 11.0. The densities are derived using v5.2 of the CHIANTI atomic database. Blending, line fitting, and instrumental issues are discussed, and line fit parameters presented.
Results. The Fe XII and Fe XIII diagnostics show broadly the same trend in density across the active region, consistent with their similar temperatures of formation. However, the high precision of the EIS measurements demonstrates significant discrepancies of up to 0.5 dex in derived log N(e) values, with Fe XII always giving higher densities than Fe XIII. The discrepancies may partly be due to real physical differences between the emitting regions of the two plasmas, but the dominant factor lies in the atomic models of the two ions. Two specific problems are identified for Fe XII lambda 196.64 and Fe XIII lambda 203.82: the former is found to be underestimated in strength by the CHIANTI atomic model, while the high-density limit of the lambda 203.82/lambda 202.04 ratio appears to be inaccurate in the CHIANTI atomic model. The small grating tilt of the EIS instrument is found to be very significant when deriving densities from emission lines separated by more than a few angstroms. Revised wavelengths of 196.518 +/- 0.003 angstrom and 196.647 +/- 0.003 angstrom are suggested for the Fe XIII lambda 196.54 and Fe XII lambda 196.64 lines, respectively.
C1 [Young, P. R.; Mariska, J. T.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Young, P. R.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Young, P. R.] George Mason Univ, Fairfax, VA 22030 USA.
[Watanabe, T.; Hara, H.] Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
RP Young, PR (reprint author), USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
EM peter.young.ctr.uk@nrl.navy.mil
FU Science and Technology Facilities Council [PP/D002907/1, ST/H000429/1]
NR 53
TC 106
Z9 106
U1 0
U2 1
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD FEB
PY 2009
VL 495
IS 2
BP 587
EP 606
DI 10.1051/0004-6361:200810143
PG 20
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 413EM
UT WOS:000263775700024
ER
PT J
AU Schmitt, HR
Pauls, TA
Tycner, C
Armstrong, JT
Zavala, RT
Benson, JA
Gilbreath, GC
Hindsley, RB
Hutter, DJ
Johnston, KJ
Jorgensen, AM
Mozurkewich, D
AF Schmitt, H. R.
Pauls, T. A.
Tycner, C.
Armstrong, J. T.
Zavala, R. T.
Benson, J. A.
Gilbreath, G. C.
Hindsley, R. B.
Hutter, D. J.
Johnston, K. J.
Jorgensen, A. M.
Mozurkewich, D.
TI NAVY PROTOTYPE OPTICAL INTERFEROMETER IMAGING OF LINE EMISSION REGIONS
OF beta LYRAE USING DIFFERENTIAL PHASE REFERENCING
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE binaries: eclipsing; methods: data analysis; stars: imaging; stars:
individual (beta Lyrae); techniques: high angular resolution;
techniques: interferometric
ID COHERENT INTEGRATION; ZETA-TAURI; STARS; MODEL; ROTATION; ELEMENTS;
ALTAIR; ARRAY; DISK
AB We present the results of an experiment to image the interacting binary star beta Lyrae with data from the Navy Prototype Optical Interferometer using a differential phase technique to correct for the effects of the instrument and atmosphere on the interferometer phases. We take advantage of the fact that the visual primary of beta Lyrae and the visibility calibrator we used are both nearly unresolved and nearly centrally symmetric, and consequently have interferometric phases near zero. We used this property to correct for the effects of the instrument and atmosphere on the phases of beta Lyrae and to obtain differential phases in the channel containing the H alpha emission line. Combining the H alpha-channel phases with information about the line strength, we recovered complex visibilities and imaged the H alpha emission using standard radio interferometrymethods. Our images show the position of the H alpha-emitting regions relative to the continuum photocenter as a function of orbital phase, indicating a major axis line of nodes along Omega = 249 degrees +/- 4 degrees. The orbit is smaller than previously predicted, a discrepancy that can be alleviated if we assume that the system is at a larger distance, or if the stellar continuum contribution to the H alpha channel was underestimated. We do not detect a jet in the H alpha images, which may be due to the limited resolution of the observations along the direction perpendicular to the orbital plane. We find that the differential phase results are consistent with those obtained from a more standard analysis using squared visibilities (V(2)s) and closure phases, which also indicate an H alpha disk radius of 0.6 +/- 0.1 mas, and Delta V 1.30 +/- 0.1 and Delta R = 1.20 +/- 0.1 mag for the magnitude difference between the stars.
C1 [Schmitt, H. R.; Pauls, T. A.; Armstrong, J. T.; Hindsley, R. B.] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
[Schmitt, H. R.] Interferometr Inc, Herndon, VA 20171 USA.
[Tycner, C.] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA.
[Zavala, R. T.; Benson, J. A.; Hutter, D. J.] USN Observ, Flagstaff Stn, Flagstaff, AZ 86001 USA.
[Gilbreath, G. C.] USN, Res Lab, Free Space Photon Commun Off, Washington, DC 20375 USA.
[Johnston, K. J.] USN Observ, Washington, DC 20392 USA.
[Jorgensen, A. M.] New Mexico Inst Min & Technol, Socorro, NM 87801 USA.
[Mozurkewich, D.] Seabrook Engn, Seabrook, MD 20706 USA.
RP Schmitt, HR (reprint author), USN, Res Lab, Remote Sensing Div, Code 7215,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM hschmitt@ccs.nrl.navy.mil
RI Zavala, Robert/D-7821-2011
OI Zavala, Robert/0000-0002-9402-2870
FU Office of Naval Research; Oceanographer of the Navy
FX The work done with the NPOI was performed through a collaboration
between the Naval Research Lab and the US Naval Observatory, in
association with Lowell Observatory, and was funded by the Office of
Naval Research and the Oceanographer of the Navy. We thank the NPOI
staff for the careful observations that contributed to this work. C. T.
thanks Lowell Observatory for the generous time allocation on the John
S. Hall 1.1 m telescope and thanks Wes Lockwood and Jeffrey Hall for
supporting the Be star project on the Solar-Stellar Spectrograph. This
research has made use of the SIMBAD literature database, operated at
CDS, Strasbourg, France. We acknowledge with thanks the variable star
observations from the AAVSO International Database contributed by
observers worldwide and used in this research. We thank Christian Hummel
for the availability of the data reduction package OYSTER. We also thank
the anonymous referee for suggestions that helped improve this paper.
NR 42
TC 28
Z9 28
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 1
PY 2009
VL 691
IS 2
BP 984
EP 996
DI 10.1088/0004-637X/691/2/984
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 406OH
UT WOS:000263304300007
ER
PT J
AU Robbrecht, E
Berghmans, D
Van der Linden, RAM
AF Robbrecht, E.
Berghmans, D.
Van der Linden, R. A. M.
TI AUTOMATED LASCO CME CATALOG FOR SOLAR CYCLE 23: ARE CMEs SCALE
INVARIANT?
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: activity; Sun: coronal mass ejections (CMEs); solar wind
ID CORONAL MASS EJECTIONS; SELF-SIMILAR MAGNETOHYDRODYNAMICS; CURRENT
SHEET; ACTIVE-REGION; LARGE-ANGLE; TRANSIENTS; EVOLUTION; DISTRIBUTIONS;
MAXIMUM; SPEEDS
AB In this paper, we present the first automatically constructed LASCO coronal mass ejection (CME) catalog, a result of the application of the Computer Aided CME Tracking software (CACTus) on the LASCO archive during the interval 1997 September-2007 January. We have studied the CME characteristics and have compared them with similar results obtained by manual detection (CDAW CME catalog). On average, CACTus detects less than two events per day during solar minimum, up to eight events during maximum, nearly half of them being narrow (< 20 degrees). Assuming a correction factor, we find that the CACTus CME rate is surprisingly consistent with CME rates found during the past 30 years. The CACTus statistics show that small-scale outflow is ubiquitously observed in the outer corona. The majority of CACTus-only events are narrow transients related to previous CME activity or to intensity variations in the slow solar wind, reflecting its turbulent nature. A significant fraction (about 15%) of CACTus-only events were identified as independent events, thus not related to other CME activity. The CACTus CME width distribution is essentially scale invariant in angular span over a range of scales from 20 degrees to 120 degrees while previous catalogs present a broad maximum around 30 degrees. The possibility that the size of coronal mass outflows follow a power-law distribution could indicate that no typical CME size exists, i.e., that the narrow transients are not different from the larger well defined CMEs.
C1 [Robbrecht, E.; Berghmans, D.; Van der Linden, R. A. M.] SIDC Royal Observ Belgium, B-1180 Brussels, Belgium.
[Robbrecht, E.] USN, Res Lab, Washington, DC 20375 USA.
[Robbrecht, E.] George Mason Univ, CEOSR, Fairfax, VA 22030 USA.
RP Robbrecht, E (reprint author), SIDC Royal Observ Belgium, Ringlaan 3, B-1180 Brussels, Belgium.
EM Eva.Robbrecht.ctr.be@nrl.navy.mil
FU PRODEX [C90204]
FX E.R. thanks Russ Howard for insightful discussions and Spiros
Patsourakos for useful comments. This work is supported by PRODEX
contract C90204 (Solar Drivers of Space Weather), managed by the
European Space Agency in collaboration with the Belgian Federal Science
Policy Office.
NR 45
TC 98
Z9 98
U1 1
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 1
PY 2009
VL 691
IS 2
BP 1222
EP 1234
DI 10.1088/0004-637X/691/2/1222
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 406OH
UT WOS:000263304300024
ER
PT J
AU Dudik, RP
Satyapal, S
Marcu, D
AF Dudik, R. P.
Satyapal, S.
Marcu, D.
TI A SPITZER SPECTROSCOPIC SURVEY OF LOW-IONIZATION NUCLEAR EMISSION-LINE
REGIONS: CHARACTERIZATION OF THE CENTRAL SOURCE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: active; galaxies: fundamental parameters; galaxies: nuclei;
infrared: galaxies; techniques: spectroscopic
ID ACTIVE GALACTIC NUCLEI; ULTRALUMINOUS INFRARED GALAXIES; DWARF SEYFERT
NUCLEI; X-RAY; SPACE-TELESCOPE; NEARBY GALAXIES; OPTICAL SPECTROSCOPY;
LUMINOSITY FUNCTION; SPECTROGRAPH IRS; RADIO PROPERTIES
AB We have conducted a comprehensive mid-infrared (IR) spectroscopic investigation of 67 low-ionization nuclear emission line regions (LINERs) using archival observations from the high-resolution modules of the Infrared Spectrograph on board the Spitzer Space Telescope. Using the [Ne V] 14 and 24 mu m lines as active galactic nuclei (AGNs) diagnostics, we detect active black holes in 39% of the galaxies in our sample, many of which show no signs of activity in either the optical or X-ray bands. In particular, a detailed comparison of multiwavelength diagnostics shows that optical studies fail to detect AGNs in galaxies with large far-IR luminosities. These observations emphasize that the nuclear power source in a large percentage of LINERs is obscured in the optical. Indeed, the majority of LINERs show mid-IR [Ne V] 14/[Ne V] 24 mu m flux ratios well below the theoretical low-density limit, suggesting that there is substantial extinction toward even the [Ne V]-emitting region. Combining optical, X-ray, and mid-IR diagnostics, we find an AGN detection rate in LINERs of 74%, higher than previously reported statistics of the fraction of LINERs hosting AGNs. The [Ne V] 24 mu m /[O IV] 26 mu m mid-IR line flux ratio in AGN-LINERs is similar to that of standard AGNs, suggesting that the spectral energy distribution of the intrinsic optical/UV continuum is similar in the two. This result is in contrast to previous suggestions of a UV deficit in the intrinsic broadband continuum emission in AGN-LINERs. Consistent with our finding of extinction to the [Ne V]-emitting region, we propose that extinction may also be responsible for the observed optical/UV deficit seen in at least some AGN-LINERs.
C1 [Dudik, R. P.; Satyapal, S.; Marcu, D.] George Mason Univ, Dept Phys & Astron, Fairfax, VA 22030 USA.
[Dudik, R. P.] NASA, Goddard Space Flight Ctr, Observat Cosmol Lab, Greenbelt, MD USA.
[Dudik, R. P.] USN Observ, Washington, DC 20392 USA.
[Dudik, R. P.] Res Support Instruments, Lanham, MD 20706 USA.
RP Dudik, RP (reprint author), George Mason Univ, Dept Phys & Astron, MS 3F3,4400 Univ Dr, Fairfax, VA 22030 USA.
EM rpdudik@usno.navy.mil
FU NASA [NAG5-11432, NAG03-4134X]; NASA Graduate Student Research Program
FX S.S. gratefully acknowledges financial support from NASA grant
NAG5-11432 and NAG03-4134X. R.P.D gratefully acknowledges financial
support from the NASA Graduate Student Research Program.
NR 65
TC 38
Z9 38
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 1
PY 2009
VL 691
IS 2
BP 1501
EP 1524
DI 10.1088/0004-637X/691/2/1501
PG 24
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 406OH
UT WOS:000263304300048
ER
PT J
AU Bryans, P
Landi, E
Savin, DW
AF Bryans, P.
Landi, E.
Savin, D. W.
TI A NEW APPROACH TO ANALYZING SOLAR CORONAL SPECTRA AND UPDATED
COLLISIONAL IONIZATION EQUILIBRIUM CALCULATIONS. II. UPDATED IONIZATION
RATE COEFFICIENTS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE atomic data; atomic processes; plasmas; Sun: corona; Sun: UV radiation
ID RECOMBINATION RATE COEFFICIENTS; FINITE-DENSITY PLASMAS; OPTICALLY THIN
PLASMAS; DIELECTRONIC RECOMBINATION; ATOMIC DATABASE; EMISSION-LINES;
ELEMENTS HYDROGEN; HEATING PROBLEM; IONS; CHIANTI
AB We have re-analyzed Solar Ultraviolet Measurement of Emitted Radiation (SUMER) observations of a parcel of coronal gas using new collisional ionization equilibrium (CIE) calculations. These improved CIE fractional abundances were calculated using state-of-the-art electron-ion recombination data for K-shell, L-shell, Na-like, and Mg-like ions of all elements from H through Zn and, additionally, Al-through Ar-like ions of Fe. They also incorporate the latest recommended electron impact ionization data for all ions of H through Zn. Improved CIE calculations based on these recombination and ionization data are presented here. We have also developed a new systematic method for determining the average emission measure (EM) and electron temperature (Te) of an isothermal plasma. With our new CIE data and a new approach for determining average EM and Te, we have re-analyzed SUMER observations of the solar corona. We have compared our results with those of previous studies and found some significant differences for the derived EM and Te. We have also calculated the enhancement of coronal elemental abundances compared to their photospheric abundances, using the SUMER observations themselves to determine the abundance enhancement factor for each of the emitting elements. Our observationally derived first ionization potential factors are in reasonable agreement with the theoretical model of Laming.
C1 [Bryans, P.; Savin, D. W.] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA.
[Landi, E.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Bryans, P (reprint author), Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA.
RI Landi, Enrico/H-4493-2011; Savin, Daniel/B-9576-2012; Bryans,
Paul/C-9196-2012
OI Savin, Daniel/0000-0002-1111-6610;
FU NASA [NNG06EA14I, NNH06CD24]
FX We thank H. Bruhns, H. Kreckel, J. M. Laming, and M. Lestinsky for
stimulating discussions. We also thank K. P. Dere for providing
corrected versions of his EII rate coefficients and for discussions
thereon. CHIANTI is a collaborative project involving the NRL (USA), RAL
(UK), MSSL (UK), the Universities of Florence (Italy) and Cambridge
(UK), and George Mason University (USA). P. B. and D. W. S. were
supported in part by the NASA Solar and Heliospheric Physics Supporting
Research Research and Analysis Program. E. L. was supported by NASA
grants NNG06EA14I and NNH06CD24 as well as other NASA grants.
NR 40
TC 146
Z9 146
U1 2
U2 10
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 1
PY 2009
VL 691
IS 2
BP 1540
EP 1559
DI 10.1088/0004-637X/691/2/1540
PG 20
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 406OH
UT WOS:000263304300050
ER
PT J
AU Gopalswamy, N
Yashiro, S
Temmer, M
Davila, J
Thompson, WT
Jones, S
McAteer, RTJ
Wuelser, JP
Freeland, S
Howard, RA
AF Gopalswamy, N.
Yashiro, S.
Temmer, M.
Davila, J.
Thompson, W. T.
Jones, S.
McAteer, R. T. J.
Wuelser, J-P
Freeland, S.
Howard, R. A.
TI EUV WAVE REFLECTION FROM A CORONAL HOLE
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE Sun: corona; Sun: coronal mass ejections (CMEs); Sun: flares; Sun:
magnetic fields; Sun: UV radiation
ID EIT WAVES; PROPAGATING DISTURBANCE; MORETON/EIT WAVE; MASS EJECTION;
SOLAR CORONA; MHD WAVES; EMISSION; ALPHA; FLARE; SUN
AB We report on the detection of EUV wave reflection from a coronal hole, as observed by the Solar Terrestrial Relations Observatory mission. The EUV wave was associated with a coronal mass ejection (CME) erupting near the disk center. It was possible to measure the kinematics of the reflected waves for the first time. The reflected waves were generally slower than the direct wave. One of the important implications of the wave reflection is that the EUV transients are truly a wave phenomenon. The EUV wave reflection has implications for CME propagation, especially during the declining phase of the solar cycle when there are many low-latitude coronal holes.
C1 [Gopalswamy, N.; Yashiro, S.; Davila, J.; Thompson, W. T.; Jones, S.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Temmer, M.] Graz Univ, IGAM Inst Phys, A-8010 Graz, Austria.
[McAteer, R. T. J.] Trinity Coll Dublin, Astrophys Res Grp, Dublin 2, Ireland.
[Howard, R. A.] USN, Res Lab, Washington, DC 20375 USA.
RP Gopalswamy, N (reprint author), NASA, Goddard Space Flight Ctr, Code 695, Greenbelt, MD 20771 USA.
EM nat.gopalswamy@nasa.gov
RI McAteer, R. T. James/D-3736-2011; Gopalswamy, Nat/D-3659-2012; Thompson,
William/D-7376-2012;
OI Temmer, Manuela/0000-0003-4867-7558
FU NASA [NNX08AD60A]; Austrian Academy of Sciences [APART 11262]; Marie
Curie Intra-European
FX S. Y. acknowledges support by NASA (NNX08AD60A). M. T. acknowledges
support by the project APART 11262 of the Austrian Academy of Sciences.
R. T. J. Mc. A. is a Marie Curie Intra-European Fellow. The SECCHI
instrument was constructed by a consortium of international
institutions: the Naval Research Laboratory (USA), the Lockheed Martin
Solar and Astrophysical Laboratory (USA), the NASA Goddard Space Flight
Center (USA), the Max-Planck-Institut fur Sonnensystemforschung
(Germany), the Centre Spatial de Liege (Belgium), the University of
Birmingham (UK), the Rutherford Appleton Laboratory (UK), the Institut
d'Optique (France), and the Institute d' Astrophysique Spatiale
(France).
NR 31
TC 83
Z9 84
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD FEB 1
PY 2009
VL 691
IS 2
BP L123
EP L127
DI 10.1088/0004-637X/691/2/L123
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 404JW
UT WOS:000263148800015
ER
PT J
AU Harra, LK
Williams, DR
Wallace, AJ
Magara, T
Hara, H
Tsuneta, S
Sterling, AC
Doschek, GA
AF Harra, L. K.
Williams, D. R.
Wallace, A. J.
Magara, T.
Hara, H.
Tsuneta, S.
Sterling, A. C.
Doschek, G. A.
TI CORONAL NONTHERMAL VELOCITY FOLLOWING HELICITY INJECTION BEFORE AN
X-CLASS FLARE
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE Sun: corona; Sun: flares
ID EUV IMAGING SPECTROMETER; MAGNETIC-FIELDS; SOLAR-FLARES; HINODE;
EVOLUTION; MISSION; PHASE
AB We explore the "pre-flare" behavior of the corona in a three-day period building up to an X-class flare on 2006 December 13 by analyzing EUV spectral profiles from the Hinode EUV Imaging Spectrometer (EIS) instrument. We found an increase in the coronal spectral line widths, beginning after the time of saturation of the injected helicity as measured by Magara & Tsuneta. In addition, this increase in line widths (indicating nonthermal motions) starts before any eruptive activity occurs. The Hinode EIS has the sensitivity to measure changes in the buildup to a flare many hours before the flare begins.
C1 [Harra, L. K.; Williams, D. R.; Wallace, A. J.] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
[Magara, T.; Hara, H.; Tsuneta, S.] Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
[Sterling, A. C.] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
[Doschek, G. A.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Harra, LK (reprint author), Univ Coll London, Mullard Space Sci Lab, Holmbury St Mary, Dorking RH5 6NT, Surrey, England.
EM lkh@mssl.ucl.ac.uk
RI Williams, David/E-6676-2011; Magara, Tetsuya/E-2406-2013;
OI Williams, David/0000-0001-9922-8117; Harra, Louise/0000-0001-9457-6200
FU JAXA; NAOJ; STFC; NASA; ESA; NSC
FX Hinode is a Japanese mission developed and launched by ISAS/JAXA,
collaborating with NAOJ as a domestic partner, NASA and STFC (UK) as
international partners. Scientific operation of the Hinode mission is
conducted by the Hinode science team organized at ISAS/JAXA. This team
mainly consists of scientists from institutes in the partner countries.
Support for the post-launch operation is provided by JAXA and NAOJ
(Japan), STFC (UK), NASA (USA), ESA, and NSC (Norway). G. A. D. is
supported by funds from the NASA Hinode program and the NRL 6.1 basic
research program.
NR 18
TC 21
Z9 21
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
EI 2041-8213
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD FEB 1
PY 2009
VL 691
IS 2
BP L99
EP L102
DI 10.1088/0004-637X/691/2/L99
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 404JW
UT WOS:000263148800009
ER
PT J
AU Young, PR
AF Young, P. R.
TI NEW EUV Fe IX EMISSION LINE IDENTIFICATIONS FROM HINODE/EIS
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE atomic data; line: identification; Sun: corona; Sun: UV radiation
ID IMAGING SPECTROMETER; OSCILLATOR-STRENGTHS; ATOMIC DATABASE;
ENERGY-LEVELS; TRANSITIONS; WAVELENGTHS; ANGSTROM; 3S23P53D; CHIANTI;
REGION
AB Four Fe IX transitions in the wavelength range 188-198 angstrom are identified for the first time in spectra from the EUV Imaging Spectrometer on board the Hinode satellite. In particular the emission line at 197.86 angstrom is unblended and close to the peak of the EIS sensitivity curve, making it a valuable diagnostic of plasma at around 800,000 K - a critical temperature for studying the interface between the corona and transition region. Theoretical ratios among the four lines predicted from the CHIANTI database reveal weak sensitivity to density and temperature with observed values consistent with theory. The ratio of lambda 197.86 relative to the lambda 171.07 resonance line of Fe IX is found to be an excellent temperature diagnostic, independent of density, and the derived temperature in the analyzed data set is log T = 5.95, close to the predicted temperature of maximum ionization of Fe IX.
C1 [Young, P. R.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Young, P. R.] George Mason Univ, Fairfax, VA 22030 USA.
RP Young, PR (reprint author), USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
NR 16
TC 27
Z9 27
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD FEB 1
PY 2009
VL 691
IS 2
BP L77
EP L81
DI 10.1088/0004-637X/691/2/L77
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 404JW
UT WOS:000263148800004
ER
PT J
AU Niemi, JV
Saarikoski, S
Aurela, M
Tervahattu, H
Hillamo, R
Westphal, DL
Aarnio, P
Koskentalo, T
Makkonen, U
Vehkamaki, H
Kulmala, M
AF Niemi, Jarkko V.
Saarikoski, Sanna
Aurela, Minna
Tervahattu, Heikki
Hillamo, Risto
Westphal, Douglas L.
Aarnio, Paivi
Koskentalo, Tarja
Makkonen, Ulla
Vehkamaki, Hanna
Kulmala, Markku
TI Long-range transport episodes of fine particles in southern Finland
during 1999-2007
SO ATMOSPHERIC ENVIRONMENT
LA English
DT Article
DE Long-range transport; Fine particles; Open biomass burning; Chemical
tracers; Satellite remote sensing
ID CHEMICAL-COMPOSITION; PARTICULATE MATTER; EASTERN-EUROPE; SPRING 2006;
URBAN AIR; BIOMASS; EMISSIONS; AEROSOLS; LEVOGLUCOSAN; COMBUSTION
AB The frequency, strength and sources of long-range transport (LRT) episodes of fine particles (PM(2.5)) were studied in southern Finland using air quality monitoring results, backward air mass trajectories, remote sensing of fire hot spots, transport and dispersion modelling of smoke and chemical analysis of particle samples (black carbon, monosaccharide anhydrides, oxalate, succinate, malonate, SO(2)(-), NO(3)(-), K(+) and NH(4)(+)). At an urban background site in Helsinki, the daily WHO guideline value (24-h PM(2.5) mean 25 mu g m(-3)) was exceeded during 1-7 LRT episodes per year in 1999-2007. The 24-h mean maximum concentrations varied between 25 and 49 mu g m(-3) during the episodes, which was 3-6 times higher than the local mean concentration (8.7 mu g m(-3)) in 1999-2007. The highest particle concentrations (max. 1-h mean 163 mu g m(-3)) and the longest episodes (max. 9 days) were mainly caused by the emissions from open biomass burning, especially during springs and late-summers in 2002 and 2006. During the period 2001-2007, the satellite remote sensing of active fire hot spots and transport and dispersion modelling of smoke indicated that approximately half of the episodes were caused partly by the emissions from wildfires and/or agricultural waste burning in fields in Eastern Europe, especially in Russia, Belarus and Ukraine. Other episodes were mainly caused by the LRT of ordinary anthropogenic pollutants, e.g. from energy production, traffic, industry and wood combustion. During those 'other episodes', air masses also arrived from Eastern Europe, including Poland. The highest concentrations of biomass-burning tracers, such as monosaccharide anhydrides (levoglucosan + mannosan + galactosan) and K+, were observed during open biomass-burning episodes, but quite high values were also measured during some winter episodes due to wood combustion emissions. Our results indicate that open biomass burning in Eastern Europe causes high fine particle concentration peaks in large areas of Europe almost every year. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Niemi, Jarkko V.] Univ Helsinki, Dept Biol & Environm Sci, FI-00014 Helsinki, Finland.
[Niemi, Jarkko V.; Aarnio, Paivi; Koskentalo, Tarja] Helsinki Metropolitan Area Council, FI-00520 Helsinki, Finland.
[Saarikoski, Sanna; Aurela, Minna; Hillamo, Risto; Makkonen, Ulla] Finnish Meteorol Inst, FI-00101 Helsinki, Finland.
[Tervahattu, Heikki] Nord Envicon Ltd, FI-00790 Helsinki, Finland.
[Westphal, Douglas L.] USN, Res Lab, Monterey, CA 93943 USA.
[Vehkamaki, Hanna; Kulmala, Markku] Univ Helsinki, Dept Phys Sci, FI-00014 Helsinki, Finland.
RP Niemi, JV (reprint author), Univ Helsinki, Dept Biol & Environm Sci, POB 27, FI-00014 Helsinki, Finland.
EM jarkko.niemi@ytv.fi
RI Vehkamaki, Hanna/A-8262-2008; Saarikoski, Sanna/A-6706-2015; Kulmala,
Markku/I-7671-2016
OI Vehkamaki, Hanna/0000-0002-5018-1255; Kulmala,
Markku/0000-0003-3464-7825
FU Helsinki University Environmental Research Centre (HERC); Finnish
Cultural Foundation, the Academy of Finland [201131]; Maj and Tor
Nessling Foundation [2006167]; Helsinki Metropolitan Area Council (YTV);
Office of Naval Research; Naval Research Laboratory [PE-0602435N];
HYSPLIT; READY; NASA Goddard Space Flight Centre (GSFC); University of
Maryland (UMD)
FX We thank the Helsinki University Environmental Research Centre (HERC),
the Finnish Cultural Foundation, the Academy of Finland (contract no.
201131), Maj and Tor Nessling Foundation (grant no. 2006167) and the
Helsinki Metropolitan Area Council (YTV) for funding of the research.
The support of the Office of Naval Research and the Naval Research
Laboratory through program PE-0602435N is gratefully acknowledged. The
NOAA Air Resources Laboratory (ARL) is acknowledged for the provision of
the HYSPLIT transport and dispersion model and READY website
(http://www.ar).noaa.gov/ready.html) used in this publication. The NASA
Goddard Space Flight Centre (GSFC) and the University of Maryland (UMD)
is acknowledged for the MODIS active fire detection results from the Web
Fire Mapper (http://firemaps.geog.umd.edu/).
NR 45
TC 38
Z9 39
U1 0
U2 16
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 FEB
PY 2009
VL 43
IS 6
BP 1255
EP 1264
DI 10.1016/j.atmosenv.2008.11.022
PG 10
WC Environmental Sciences; Meteorology & Atmospheric Sciences
SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
GA 408HR
UT WOS:000263426600011
ER
PT J
AU Pizzi, RMR
Rossetti, D
Cino, G
Marino, D
Vescovi, AL
Baer, W
AF Pizzi, R. M. R.
Rossetti, D.
Cino, G.
Marino, D.
Vescovi, A. L.
Baer, W.
TI A cultured human neural network operates a robotic actuator
SO BIOSYSTEMS
LA English
DT Article
DE MEA; Neurons; Stem cells; Bionics; Robot; Artificial neural networks
ID STEM-CELLS; MICROELECTRODE ARRAYS; SILICON JUNCTION; ELECTRODE ARRAYS;
NEURONS; STIMULATION; TRANSISTOR; CHIP; CNS; DIMENSION
AB The development of bio-electronic prostheses, hybrid human-electronics devices and bionic robots has been the aim of many researchers. Although neurophysiologic processes have been widely investigated and bio-electronics has developed rapidly, the dynamics of a biological neuronal network that receive sensory inputs, store and control information is not yet understood. Toward this end, we have taken an interdisciplinary approach to study the learning and response of biological neural networks to complex stimulation patterns. This paper describes the design, execution, and results of several experiments performed in order to investigate the behavior of complex interconnected structures found in biological neural networks.
The experimental design consisted of biological human neurons stimulated by parallel signal patterns intended to simulate complex perceptions. The response patterns were analyzed with an innovative artificial neural network (ANN), called ITSOM (Inductive Tracing Self Organizing Map). This system allowed us to decode the complex neural responses from a mixture of different stimulations and learned memory patterns inherent in the cell colonies. In the experiment described in this work, neurons derived from human neural stem cells were connected to a robotic actuator through the ANN analyzer to demonstrate our ability to produce useful control from simulated perceptions stimulating the cells.
Preliminary results showed that in vitro human neuron colonies can learn to reply selectively to different stimulation patterns and that response signals can effectively be decoded to operate a minirobot. Lastly the fascinating performance of the hybrid system is evaluated quantitatively and potential future work is discussed. (C) 2008 Elsevier Ireland Ltd. All rights reserved.
C1 [Pizzi, R. M. R.; Rossetti, D.; Cino, G.] Univ Milan, Dept Informat Technol, Living Networks Lab, I-26013 Crema, CR, Italy.
[Marino, D.; Vescovi, A. L.] DIBIT S Raffaele, Stem Cell Res Inst, I-20132 Milan, Italy.
[Baer, W.] USN, Postgrad Sch, Dept Informat Sci, Monterey, CA USA.
RP Pizzi, RMR (reprint author), Univ Milan, Dept Informat Technol, Living Networks Lab, Via Bramante 65, I-26013 Crema, CR, Italy.
EM pizzi@dti.unimi.it; baer@nps.edu
NR 64
TC 10
Z9 10
U1 0
U2 9
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0303-2647
EI 1872-8324
J9 BIOSYSTEMS
JI Biosystems
PD FEB
PY 2009
VL 95
IS 2
BP 137
EP 144
DI 10.1016/j.biosystems.2008.09.006
PG 8
WC Biology; Mathematical & Computational Biology
SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational
Biology
GA 402MK
UT WOS:000263017600008
PM 18983888
ER
PT J
AU Biffinger, J
Ribbens, M
Ringeisen, B
Pietron, J
Finkel, S
Nealson, K
AF Biffinger, Justin
Ribbens, Meghann
Ringeisen, Bradley
Pietron, Jeremy
Finkel, Steven
Nealson, Kenneth
TI Characterization of Electrochemically Active Bacteria Utilizing a
High-Throughput Voltage-Based Screening Assay
SO BIOTECHNOLOGY AND BIOENGINEERING
LA English
DT Article
DE microbial fuel cell; high-throughput screening; Shewanella; metal
reduction; voltage
ID SHEWANELLA-ONEIDENSIS MR-1; REDUCTION-DEFICIENT MUTANTS; MICROBIAL
FUEL-CELLS; METAL-REDUCING BACTERIUM; ELECTRON-TRANSFER; OXIDE
REDUCTION; PUTREFACIENS; IRON; CHALLENGES; SEDIMENTS
AB Metal reduction assays are traditionally used to select and characterize electrochemically active bacteria (EAB) for use in microbial fuel cells (MFCs). However, correlating the ability of a microbe to generate current from an MFC to the reduction of metal oxides has not been definitively established in the literature. As these metal reduction assays may not be generally reliable, here we describe a four- to nine-well prototype high throughput voltage-based screening assay (VBSA) designed using MFC engineering principles and a universal cathode. Bacterial growth curves for Shewanella oneidensis strains DSP10 and MR-1 were generated directly from changes in open circuit voltage and current with five percent deviation calculated between each well. These growth curves exhibited a strong correlation with literature doubling times for Shewanella indicating that the VBSA can be used to monitor distinct fundamental properties of EAB life cycles. In addition, eight different organic electron donors (acetate, lactate, citrate, fructose, glucose, sucrose, soluble starch, and agar) were tested with S. oneidensis MR-1 in anode chambers exposed to air. Under oxygen exposure, we found that Current was generated in direct response to additions of acetate, lactate, and glucose.
C1 [Biffinger, Justin; Ringeisen, Bradley; Pietron, Jeremy] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
[Ribbens, Meghann; Finkel, Steven] Univ So Calif, Dept Biol Sci, Mol & Computat Biol Program, Los Angeles, CA 90089 USA.
[Nealson, Kenneth] Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089 USA.
RP Biffinger, J (reprint author), USN, Res Lab, Div Chem, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM justin.biffinger@nrl.navy.mil
FU Office of Naval Research; Air Force Office of Scientific Research
[FA9350-06-1-0292]
FX This work was funded by the Office of Naval Research (NRL. 6.2 Program
Element Number 62123N) and the Air Force Office of Scientific Research
(MURI program, Award No. FA9350-06-1-0292). The authors would like to
thank Barry Spargo for his helpful discussions about device design and
fabrication methodology.
NR 39
TC 34
Z9 34
U1 6
U2 36
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 FEB 1
PY 2009
VL 102
IS 2
BP 436
EP 444
DI 10.1002/bit.22072
PG 9
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 395RD
UT WOS:000262540300011
PM 18767193
ER
PT J
AU Sarantakes, NE
AF Sarantakes, Nicholas Evan
TI The Olympics and the Cold War Moscow versus Los Angeles: the Nixon White
House wages Cold War in the Olympic selection process
SO COLD WAR HISTORY
LA English
DT Article
ID AMERICAN PARTICIPATION; SPORT
AB In 1970 the Nixon Administration bribed members of the International Olympic Committee in an effort to bring the 1976 summer games to Los Angeles. These actions injected Cold War issues into the process of selecting Olympic host cities. This effort initiated a political confrontation with the Soviet Union, since Moscow was another of the candidate cities. Although weak and vulnerable to political assaults, the International Olympic movement's decentralized organizational nature made it difficult for the Nixon White House to bring the Olympics to Los Angeles. The administration learned from this failure and was more successful in offering more limited support to efforts to host the 1980 Winter Olympics.
C1 USN, War Coll, Dept Strategy & Policy, Newport, RI USA.
RP Sarantakes, NE (reprint author), USN, War Coll, Dept Strategy & Policy, 686 Cushing Rd, Newport, RI USA.
EM Nick.Sarantakcs@nwc.navy.mil
NR 31
TC 3
Z9 3
U1 2
U2 7
PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXFORDSHIRE, ENGLAND
SN 1468-2745
J9 COLD WAR HIST
JI Cold War Hist.
PD FEB
PY 2009
VL 9
IS 1
BP 135
EP 157
DI 10.1080/14682740802573508
PG 23
WC History
SC History
GA 473OG
UT WOS:000268216500006
ER
PT J
AU Mazeina, L
Picard, YN
Prokes, SM
AF Mazeina, Lena
Picard, Yoosuf N.
Prokes, Sharka M.
TI Controlled Growth of Parallel Oriented ZnO Nanostructural Arrays on
Ga2O3 Nanowires
SO CRYSTAL GROWTH & DESIGN
LA English
DT Article
ID CORE-SHELL NANOWIRES; HIERARCHICAL STRUCTURES; OPTICAL-PROPERTIES;
NANOROD ARRAYS; BETA-GA2O3; NANORIBBONS
AB Novel hierarchical ZnO-Ga2O3 nanostructures were fabricated via a two stage growth process. Nanowires of Ga2O3 were obtained in the first stage by the vapor-liquid-solid mechanism and used as the foundation for growth of self-assembled, ordered arrays of ZnO nanostructures during the second stage by the vapor-solid mechanism. The resulting hierarchical nanostructures had a final morphology consisting of nanobrushes (NBs) with Ga2O3 as the core and ZnO as the branches self-assembling symmetrically in six equiangular directions around the core. Characterization of the NBs was performed by scanning and transmission electron microscopies, energy dispersive spectroscopy, and Fourier transform infrared spectroscopy. The mechanism of formation is discussed together with potential applications, among which is the aligned growth of vertically aligned ZnO nanorods that are touted for optoelectronics. Advantages of this alignment method are lower temperature growth, reduced amount of thermally induced defects, and absence of catalytic impurities.
C1 [Mazeina, Lena; Picard, Yoosuf N.; Prokes, Sharka M.] USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
RP Mazeina, L (reprint author), USN, Res Lab, Div Elect Sci & Technol, 4555 Overlook Ave, Washington, DC 20375 USA.
EM lena.mazeina@nrl.navy.mil
OI Picard, Yoosuf/0000-0002-2853-5213
FU Office of Naval Research; National Research Council
FX Victor Bermudez and Keith Perkins are thanked for useful discussions.
This work was supported by the Office of Naval Research. L.M. and Y.N.P.
thank the National Research Council for financial support through the
Research Associateship Program.
NR 35
TC 31
Z9 31
U1 4
U2 26
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1528-7483
J9 CRYST GROWTH DES
JI Cryst. Growth Des.
PD FEB
PY 2009
VL 9
IS 2
BP 1164
EP 1169
DI 10.1021/cg800993b
PG 6
WC Chemistry, Multidisciplinary; Crystallography; Materials Science,
Multidisciplinary
SC Chemistry; Crystallography; Materials Science
GA 402YE
UT WOS:000263048200075
ER
PT J
AU Ramp, SR
Davis, RE
Leonard, NE
Shulman, I
Chao, Y
Robinson, AR
Marsden, J
Lermusiaux, PFJ
Fratantoni, DM
Paduan, JD
Chavez, FP
Bahr, FL
Liang, S
Leslie, W
Li, Z
AF Ramp, S. R.
Davis, R. E.
Leonard, N. E.
Shulman, I.
Chao, Y.
Robinson, A. R.
Marsden, J.
Lermusiaux, P. F. J.
Fratantoni, D. M.
Paduan, J. D.
Chavez, F. P.
Bahr, F. L.
Liang, S.
Leslie, W.
Li, Z.
TI Preparing to predict: The Second Autonomous Ocean Sampling Network
(AOSN-II) experiment in the Monterey Bay
SO DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
LA English
DT Article
DE Ocean circulation; Ocean heat budget; Ocean winds; Ocean temperature;
Salinity; Density
ID LAGRANGIAN COHERENT STRUCTURES; LOCALIZED MULTISCALE ENERGY; DATA-DRIVEN
SIMULATIONS; CENTRAL CALIFORNIA; DATA ASSIMILATION; VORTICITY ANALYSIS;
MASSACHUSETTS BAY; CONTINENTAL-SHELF; POINT SUR; VARIABILITY
AB The Autonomous Ocean Sampling Network Phase Two (AOSN-II) experiment was conducted in and offshore from the Monterey Bay on the central California coast during July 23-September 6, 2003. The objective of the experiment was to learn how to apply new tools, technologies, and analysis techniques to adaptively sample the coastal ocean in a manner demonstrably superior to traditional methodologies, and to use the information gathered to improve predictive skill for quantities of interest to end-users. The scientific goal was to study the upwelling/relaxation cycle near an open coastal bay in an eastern boundary current region, particularly as it developed and spread from a coastal headland. The suite of observational tools used included a low-flying aircraft, a fleet of underwater gliders, including several under adaptive autonomous control, and propeller-driven AUVs in addition to moorings, ships, and other more traditional hardware. The data were delivered in real time and assimilated into the Harvard Ocean Prediction System (HOPS), the Navy Coastal Ocean Model (NCOM), and the jet Propulsion Laboratory implementation of the Regional Ocean Modeling System (JPL/ROMS).
Two upwelling events and one relaxation event were sampled during the experiment. The upwelling in both cases began when a pool of cold water less than 13 degrees C appeared near Cape Ano Nuevo and subsequently spread offshore and southward across the bay as the equatorward wind stress continued. The primary difference between the events was that the first event spread offshore and southward, while the second event spread only southward and not offshore. The difference is attributed to the position and strength of meanders and eddies of the California Current System offshore, which blocked or steered the cold upwelled water. The space and time scales of the mesoscale variability were much shorter than have been previously observed in deep-water eddies offshore. Additional process studies are needed to elucidate the dynamics of the flow. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Ramp, S. R.; Chavez, F. P.] Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039 USA.
[Davis, R. E.] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
[Leonard, N. E.] Princeton Univ, Dept Mech Engn, Princeton, NJ 08544 USA.
[Shulman, I.] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Chao, Y.; Li, Z.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
[Robinson, A. R.; Liang, S.; Leslie, W.] Harvard Univ, Cambridge, MA 02138 USA.
[Marsden, J.] CALTECH, Pasadena, CA 91125 USA.
[Lermusiaux, P. F. J.] MIT, Cambridge, MA 02139 USA.
[Paduan, J. D.; Bahr, F. L.] USN, Postgrad Sch, Monterey, CA USA.
[Fratantoni, D. M.] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA.
RP Ramp, SR (reprint author), Monterey Bay Aquarium Res Inst, 7700 Sandholdt Rd, Moss Landing, CA 95039 USA.
EM sramp@mbari.org
RI Fratantoni, David/C-7121-2011; Lermusiaux, Pierre/H-6003-2011;
OI Davis, Russ/0000-0003-1903-6313
FU Office of Naval Research, Ocean, Atmosphere, and Space Department;
Monterey Bay Aquarium Research Institute
FX The authors are indebted to the Office of Naval Research, Ocean,
Atmosphere, and Space Department, for funding the AOSN program. Dr. Tom
Curtin of ONR provided direction and leadership for the AOSN program
over a period of many years to make it a reality. Additional support,
especially for shore-side logistics, was provided by the Monterey Bay
Aquarium Research Institute. Aircraft support was provided by the NPS
Center for Interdisciplinary Remotely Piloted Aircraft Studies (CIRPAS),
especially by Bob Bluth, Haf Jonsson, and Gintas Buzorius. Countless
technical staff and graduate students worked long hours during the field
program to collect and process real-time data, implement models and
assimilate the data, and to disseminate and discuss the results.
NR 73
TC 52
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U1 4
U2 16
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0645
J9 DEEP-SEA RES PT II
JI Deep-Sea Res. Part II-Top. Stud. Oceanogr.
PD FEB
PY 2009
VL 56
IS 3-5
BP 68
EP 86
DI 10.1016/j.dsr2.2008.08.013
PG 19
WC Oceanography
SC Oceanography
GA 452MH
UT WOS:000266543600003
ER
PT J
AU Doyle, JD
Jiang, QF
Chao, Y
Farrara, J
AF Doyle, James D.
Jiang, Qingfang
Chao, Yi
Farrara, John
TI High-resolution real-time modeling of the marine atmospheric boundary
layer in support of the AOSN-II field campaign
SO DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
LA English
DT Article
DE Air-sea interaction; AOSN-II; High-resolution atmospheric modeling; Sea
breeze circulation; Coastal low-level jet
ID WIND STRESS CURL; NORTHERN CALIFORNIA; SEA-BREEZE; SUPERCRITICAL-FLOW;
DOPPLER LIDAR; COASTAL OCEAN; MONTEREY BAY; SIMULATIONS; DYNAMICS;
REANALYSIS
AB The Navy's COAMPS atmospheric model has been used to provide twice-daily, real-time forecasts of 72-h duration in support of the AOSN-II field campaign during August 2003. The model was configured with four grid meshes with a minimum horizontal grid increment of 3 km. A statistical analysis of the model forecasts using available buoy observations demonstrates the skill of the atmospheric model predictions with characteristic wind speed RMS and bias errors of 1-3 m s(-1) and less than 0.5-1.0 m s(-1), respectively, and temperature RMS errors of 1-2 degrees C and biases typically less than 1.0 degrees C. The highest-resolution mesh provides more accurate wind-speed variances during the upwelling periods in the nearshore region, where the wind-speed gradients and diurnal variations are the largest. Persistent and strong low-level winds from a northwesterly direction were associated with a mid-tropospheric trough and jet stream that was substantially stronger than the overall mean monthly conditions. During the relaxation periods, which were relatively infrequent during August 2003, the trough was weaker than the mean conditions with a closed low west of the coast that resulted in southerlies near the coast. During upwelling-favorable conditions, the mean marine inversion was substantially stronger than during the relaxation periods with the surface-stress field exhibiting maxima in the lee of prominent coastal capes and topography, particularly during the periods of strong larger-scale low-level flow. The persistent mean stress pattern that is topographically locked, yields maxima in the stress curl pattern that induce favorable regions of coastal upwelling near and downwind of the coastal promontories and headlands. Published by Elsevier Ltd.
C1 [Doyle, James D.] USN, Res Lab, Marine Meteorol Div, Monterey, CA 93943 USA.
[Jiang, Qingfang] UCAR, Monterey, CA USA.
[Chao, Yi; Farrara, John] CALTECH, JPL, Pasadena, CA 91125 USA.
RP Doyle, JD (reprint author), USN, Res Lab, Marine Meteorol Div, 7 Grace Hopper Ave, Monterey, CA 93943 USA.
EM james.doyle@nrlmry.navy.mil
FU Office of Naval Research's Program Element [0601153N]; National
Aeronautics and Space Administration (NASA); Fleet Numerical Meteorology
and Oceanography Command
FX The first two authors acknowledge support through the Office of Naval
Research's Program Element 0601153N. The research for Y. Chao and J.
Farrara was carried out, in part, at the jet Propulsion Laboratory,
California Institute of Technology, under contract with the National
Aeronautics and Space Administration (NASA). Computational resources
were supported in part by the Fleet Numerical Meteorology and
Oceanography Command. COAMPS (R) is a registered trademark of the Naval
Research Laboratory. We acknowledge Richard Lind of the Naval
Postgraduate School for providing the Fort Ord shortwave radiation data.
We are grateful for helpful comments from three anonymous reviewers and
as well as suggestions and comments from Tracy Haack.
NR 35
TC 40
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U1 0
U2 3
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0645
J9 DEEP-SEA RES PT II
JI Deep-Sea Res. Part II-Top. Stud. Oceanogr.
PD FEB
PY 2009
VL 56
IS 3-5
BP 87
EP 99
DI 10.1016/j.dsr2.2008.08.009
PG 13
WC Oceanography
SC Oceanography
GA 452MH
UT WOS:000266543600004
ER
PT J
AU Chao, Y
Li, ZJ
Farrara, J
McWilliams, JC
Bellingham, J
Capet, X
Chavez, F
Choi, JK
Davis, R
Doyle, J
Fratantoni, DM
Li, P
Marchesiello, P
Moline, MA
Paduan, J
Ramp, S
AF Chao, Yi
Li, Zhijin
Farrara, John
McWilliams, James C.
Bellingham, James
Capet, Xavier
Chavez, Francisco
Choi, Jei-Kook
Davis, Russ
Doyle, Jim
Fratantoni, David M.
Li, Peggy
Marchesiello, Patrick
Moline, Mark A.
Paduan, Jeff
Ramp, Steve
TI Development, implementation and evaluation of a data-assimilative ocean
forecasting system off the central California coast
SO DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
LA English
DT Article
DE Data assimilation; Ocean modeling; Ocean forecast; Coastal ocean;
Adaptive sampling; Reanalysis
ID MONTEREY BAY; MODELING SYSTEM; SURFACE; FLOW; TOPOGRAPHY; DYNAMICS; ROMS
AB The development and implementation of a real-time ocean forecast system based on the Regional Ocean Modeling System (ROMS) off the coast of central California are described. The ROMS configuration consists of three nested modeling domains with increasing spatial resolutions: the US West coastal ocean at 15-km resolution, the central California coastal ocean at 5 km, and the Monterey Bay region at 1.5 km. All three nested models have 32 vertical sigma (or terrain-following) layers and were integrated in conj. unction with a three-dimensional variational data assimilation algorithm (3DVAR) to produce snapshots of the ocean state every 6 h (the reanalysis) and 48-h forecasts once a day. This ROMS forecast system was operated in real time during the field experiment known as the Autonomous Ocean Sampling Network (AOSN-II) in August 2003. After the field experiment, a number of improvements were made to the ROMS forecast system: more data were added in the reanalysis with more careful quality control procedures, improvements were made in the data assimilation scheme, as well as model surface and side boundary conditions.
The results from the ROMS reanalysis are presented here. The ROMS reanalysis is first compared with the assimilated data as a consistency check. An evaluation of the ROMS reanalysis against the independent measurements that are not assimilated into the model is then presented. This evaluation shows the mean differences in temperature and salinity between reanalysis and observations to be less than 1 degrees C and 0.2 psu (practical salinity unit), respectively, with root-mean-square (RMS) differences of less than 1.5 degrees C and 0.25 psu. Qualitative agreement is found between independent current measurements and the ROMS reanalysis. The agreement is particularly good for the vertically integrated current along the offshore glider tracks: the ROMS reanalysis can realistically reproduce the poleward California Undercurrent. Reasonably good agreement is found in the spatial patterns of the surface current as measured by high-frequency (HF) radars. Preliminary results concerning the ROMS forecast skill and predictability are also presented. Future plans to improve the ROMS forecast system with a particular focus on assimilation of HF radar current measurements are discussed. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Chao, Yi; Li, Zhijin; Li, Peggy] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Farrara, John] Raytheon ITSS, Pasadena, CA USA.
[McWilliams, James C.; Capet, Xavier] Univ Calif Los Angeles, Los Angeles, CA USA.
[Bellingham, James; Chavez, Francisco] Monterey Bay Aquarium Res Inst, Moss Landing, CA USA.
[Choi, Jei-Kook] USN, Oceanog Off, Stennis Space Ctr, MS 39529 USA.
[Davis, Russ] Univ Calif San Diego, Scripps Inst Oceanog, San Diego, CA 92103 USA.
[Doyle, Jim] USN, Res Lab, Monterey, CA USA.
[Fratantoni, David M.] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA.
[Marchesiello, Patrick] IRD, Noumea, New Caledonia.
[Moline, Mark A.] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA.
[Paduan, Jeff; Ramp, Steve] USN, Postgrad Sch, Monterey, CA USA.
RP Chao, Y (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr,M-S 183-601, Pasadena, CA 91109 USA.
EM Yi.Chao@jpl.nasa.gov
RI Fratantoni, David/C-7121-2011;
OI Davis, Russ/0000-0003-1903-6313
FU National Aeronautics and Space Administration (NASA); Office of Naval
Research (ONR) [0601153N]
FX The research described in this paper was carried out, in part, at the
jet Propulsion Laboratory, California Institute of Technology, under
contract with the National Aeronautics and Space Administration (NASA).
Support from the Office of Naval Research (ONR) through a subcontract
from MBARI to Raytheon is acknowledged. Additional support is
acknowledged through ONR's program element 0601153N for J. Doyle.
Computational resources for COAMPS were supported in part by the FNMOC.
COAMPS (R) is a registered trademark of the NRL. Thanks also go to the
rest of the JPL ROMS team (KJ Park, Xiaochun Wang, Quoc Vu, Carrie
Zhang) and Dr. Kayo Ide at UCLA who have provided advice and technical
help throughout the field experiment and post-experiment reanalysis
phase.
NR 32
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U1 0
U2 11
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0645
J9 DEEP-SEA RES PT II
JI Deep-Sea Res. Part II-Top. Stud. Oceanogr.
PD FEB
PY 2009
VL 56
IS 3-5
BP 100
EP 126
DI 10.1016/j.dsr2.2008.08.011
PG 27
WC Oceanography
SC Oceanography
GA 452MH
UT WOS:000266543600005
ER
PT J
AU Haley, PJ
Lermusiaux, PFJ
Robinson, AR
Leslie, WG
Logoutov, O
Cossarini, G
Liang, XS
Moreno, P
Ramp, SR
Doyle, JD
Bellingham, J
Chavez, F
Johnston, S
AF Haley, P. J., Jr.
Lermusiaux, P. F. J.
Robinson, A. R.
Leslie, W. G.
Logoutov, O.
Cossarini, G.
Liang, X. S.
Moreno, P.
Ramp, S. R.
Doyle, J. D.
Bellingham, J.
Chavez, F.
Johnston, S.
TI Forecasting and reanalysis in the Monterey Bay/California Current region
for the Autonomous Ocean Sampling Network-II experiment
SO DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
LA English
DT Article
DE Coastal upwelling; Data assimilation; Physical oceanography; Prediction;
Skill; Uncertainty
ID CALIFORNIA CURRENT SYSTEM; COASTAL TRANSITION ZONE; LAGRANGIAN COHERENT
STRUCTURES; PRIMITIVE EQUATION MODEL; DATA ASSIMILATION; NORTHERN
CALIFORNIA; UNDERWATER GLIDERS; COLD FILAMENTS; BAY; VARIABILITY
AB During the August-September 2003 Autonomous Ocean Sampling Network-II experiment, the Harvard Ocean Prediction System (HOPS) and Error Subspace Statistical Estimation (ESSE) system were utilized in real-time to forecast physical fields and uncertainties, assimilate various ocean measurements (CTD, AUVs, gliders and SST data), provide suggestions for adaptive sampling, and guide dynamical investigations. The qualitative evaluations of the forecasts showed that many of the surface ocean features were predicted, but that their detailed positions and shapes were less accurate. The root-mean-square errors of the real-time forecasts showed that the forecasts had skill out to two days. Mean one-day forecast temperature RMS error was 0.26 degrees C less than persistence RMS error. Mean two-day forecast temperature RMS error was 0.13 degrees C less than persistence RMS error. Mean one- or two-day salinity RMS error was 0.036 PSU less than persistence RMS error. The real-time skill in the surface was found to be greater than the skill at depth. Pattern correlation coefficient comparisons showed, on average, greater skill than the RMS errors. For simulations lasting 10 or more days, uncertainties in the boundaries could lead to errors in the Monterey Bay region.
Following the real-time experiment, a reanalysis was performed in which improvements were made in the selection of model parameters and in the open-boundary conditions. The result of the reanalysis was improved long-term stability of the simulations and improved quantitative skill, especially the skill in the main thermocline (RMS simulation error 1 degrees C less than persistence RMS error out to five days). This allowed for an improved description of the ocean features. During the experiment there were two-week to 10-day long upwelling events. Two types of upwelling events were observed: one with plumes extending westward at point Ano Nuevo (AN) and Point Sur (PS); the other with a thinner band of upwelled water parallel to the coast and across Monterey Bay. During strong upwelling events the flows in the upper 10-20 m had scales similar to atmospheric scales. During relaxation, kinetic energy becomes available and leads to the development of mesoscale features. At 100-300 m depths, broad northward flows were observed, sometimes with a coastal branch following topographic features. An anticyclone was often observed in the subsurface fields in the mouth of Monterey Bay. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Haley, P. J., Jr.; Lermusiaux, P. F. J.; Leslie, W. G.; Logoutov, O.] MIT, Cambridge, MA 02139 USA.
[Haley, P. J., Jr.; Lermusiaux, P. F. J.; Robinson, A. R.; Leslie, W. G.; Logoutov, O.; Liang, X. S.; Moreno, P.] Harvard Univ, Cambridge, MA 02138 USA.
[Cossarini, G.] Ist Nazl Oceanog & Geofis Sperimentale, I-34010 Sgonico, TS, Italy.
[Cossarini, G.] Univ Trieste, I-34127 Trieste, Italy.
[Liang, X. S.] Courant Inst, New York, NY 10012 USA.
[Moreno, P.] Swedish Meteorol & Hydrol Inst, S-42671 Vastra Frolunda, Sweden.
[Ramp, S. R.; Bellingham, J.; Chavez, F.] Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039 USA.
[Doyle, J. D.] USN, Res Lab, Monterey, CA 93943 USA.
[Johnston, S.] Scripps Inst Oceanog, La Jolla, CA 92093 USA.
RP Haley, PJ (reprint author), MIT, 77 Mass Ave, Cambridge, MA 02139 USA.
EM phaley@mit.edu; pierrel@mit.edu
RI Lermusiaux, Pierre/H-6003-2011;
OI COSSARINI, Gianpiero/0000-0001-7803-8568
FU Office of Naval Research [N00014-04-1-0534, sub-00000917,
N00014-07-1-0534, N00014-07-1-1061, N00014-05-1-0335, 0601153N]; Fleet
Numerical Meteorology and Oceanography Command
FX We thank our colleagues from the AOSN-II team including A, Gangopadhyay,
N. Leonard, J. Marsden, H. Schmidt, R. Davis, D. Fratantoni, I. Shulman,
Y. Chao, S. Haddock, S. Majumdar, L. Rosenfeld and F. Lekien for useful
discussions and fruitful collaborations. We are very greatful to our
colleagues that have provided us with ocean measurements in real time,
including R. Davis, D. Fratantoni, S. Haddock, M.A. McManus and E.
McPheeShaw. We also thank the ship crews and other individuals involved
in collecting ocean and atmosphere data. We thank J. Ryan and J. Paduan
for providing us with high resolution topography for Monterey Bay. We
thank D. Fratantoni for his work in editing this manuscript We also
thank the three reviewers for their many useful comments. To carry out
the present research, PJH, PFJL, WGL and OGL were supported by the
Office of Naval Research under grants MURI-ASAP (N00014-04-1-0534,
sub-00000917), ASRTP (N00014-07-1-0534) and core ONR6.1
(N00014-07-1-1061) to MIT. For the first part of this effort, PJH, PFJL,
ARR, WGL, OGL and XSL were funded by the Office of Naval Research under
grants MURI-ASAP (N00014-04-1-0534) and core ONR6.1 (N00014-05-1-0335)
to Harvard University. J. Doyle acknowledges support through the Office
of Naval Research's Program Element 0601153N. Computational resources
were supported in part by the Fleet Numerical Meteorology and
Oceanography Command. COAMPS is a registered trademark of the Naval
Research Laboratory.
NR 81
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U1 1
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0645
EI 1879-0100
J9 DEEP-SEA RES PT II
JI Deep-Sea Res. Part II-Top. Stud. Oceanogr.
PD FEB
PY 2009
VL 56
IS 3-5
BP 127
EP 148
DI 10.1016/j.dsr2.2008.08.010
PG 22
WC Oceanography
SC Oceanography
GA 452MH
UT WOS:000266543600006
ER
PT J
AU Shulman, I
Paduan, JD
AF Shulman, Igor
Paduan, Jeffrey D.
TI Assimilation of HF radar-derived radials and total currents in the
Monterey Bay area
SO DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
LA English
DT Article
DE Ocean data assimilation and reanalysis; Coastal processes; Currents;
Ocean observing systems; Upwelling
ID COASTAL OCEAN MODEL; SURFACE CURRENTS
AB Impact of HF radar surface-current assimilation on ocean circulation model predictions in the Monterey Bay area is studied and evaluated during the time frame of the Autonomous Ocean Sampling Network (AOSN-II) experiment (August-September 2003). In the first instance, a previously described method for assimilation of surface current data is applied to 33-h low-pass-filtered data and a non-tidal version of the circulation model. It is demonstrated that assimilation of surface velocity data significantly improves the surface and subsurface correlation of model currents with moored current observations. These results from the AOSN-II period illustrate that surface-current assimilation is beneficial even in cases for which very high-resolution (3 km) atmospheric forcing is utilized. The assimilation approach is also tested with hourly, unfiltered, CODAR-type HF radar-derived surface currents within a model configuration that includes tidal forcing. It is shown, that assimilation of unfiltered (with tides) surface-current observations into the model with tides improves the sub-tidal model predictions to the level comparable with the assimilation of filtered data into the non-tidal model, which is significant with respect to options for designing real-time nowcast and forecast systems. Finally, the approach is extended and evaluated for the direct assimilation of HF radar-derived radial velocity components. The model runs that included assimilation of radials from at least two HF radar sites show better correlations with observations than the non-assimilative run, especially those runs that included radials from the Santa Cruz site. Directions of radials for that site coincide with the directions of dominant southward flow during upwelling events and the northward flow during relaxation events. Direct assimilation of radial currents extends the range of influence of the data into regions covered by only one HF radar site. Published by Elsevier Ltd.
C1 [Shulman, Igor] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Paduan, Jeffrey D.] USN, Postgrad Sch, Monterey, CA USA.
RP Shulman, I (reprint author), USN, Res Lab, Code 7331,Bldg 1009,Room A144, Stennis Space Ctr, MS 39529 USA.
EM igor.shulman@nrlssc.navy.mil
FU Naval Research Laboratory (NRL) [61153N]; Office of Naval Research
[N00011405WX20794, N00011405WX20624, N0001403WX21141, N0001403WX20819]
FX This research was funded through the Naval Research Laboratory (NRL)
under program element 61153N and by the Office of Naval Research under
documents N00011405WX20794, N00011405WX20624, N0001403WX21141 and
N0001403WX20819. We thank Leslie Rosenfeld of NPS for help with the
tidal current implementation, and Jim Doyle of NRL Monterey for COAMPS
(TM) atmospheric forcing during the AOSN-II experiment. Our thanks also
go to Mike Cook and Fred Bahr of NPS for providing assistance with the
quality-control, processing, and presentation of the HF radar and
mooring data, respectively. We thank Stephanie Anderson of NRL also for
help with figures. Computer time for the numerical simulations was
provided through a grant from the Department of Defense High Performance
Computing Initiative. COAMPS (TM) is a registered trademark of the Naval
Research Laboratory. This manuscript is a NRL contribution 7330-06-7030.
NR 26
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U1 0
U2 3
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0645
J9 DEEP-SEA RES PT II
JI Deep-Sea Res. Part II-Top. Stud. Oceanogr.
PD FEB
PY 2009
VL 56
IS 3-5
BP 149
EP 160
DI 10.1016/j.dsr2.2008.08.004
PG 12
WC Oceanography
SC Oceanography
GA 452MH
UT WOS:000266543600007
ER
PT J
AU Shadden, SC
Lekien, F
Paduan, JD
Chavez, FP
Marsden, JE
AF Shadden, Shawn C.
Lekien, Francois
Paduan, Jeffrey D.
Chavez, Francisco P.
Marsden, Jerrold E.
TI The correlation between surface drifters and coherent structures based
on high-frequency radar data in Monterey Bay
SO DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
LA English
DT Article
DE Lagrangian coherent structures; Aperiodic flows; Chaotic transport;
Lyapunov exponents; Drifters; Coastal radar
ID HF RADAR; INVARIANT-MANIFOLDS; APERIODIC FLOWS; POLAR VORTEX;
WIND-DRIVEN; TRANSPORT; CURRENTS; DYNAMICS
AB This paper investigates the transport structure of surface currents around the Monterey Bay, CA region. Currents measured by radar stations around Monterey Bay indicate the presence of strong, spatial and temporal, nonlinear patterns. To understand the geometry of the flow in the bay, Lagrangian coherent structures (LCS) are computed. These structures are mobile separatrices that divide the flow into regions of qualitatively different dynamics. They provide direct information about the flow structure but are geometrically simpler than particle trajectories themselves. The LCS patterns were used to reveal the mesoscale flow conditions observed during the 2003 Autonomous Ocean Sampling Network (AOSN-II) experiment.
Drifter paths from the AOSN experiment were compared to the patterns induced by the LCS computed from high-frequency radar data. We verify that the fate of the drifters can be better characterized based on the LCS than direct interpretation of the current data. This property can be exploited to optimize drifter deployment. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Shadden, Shawn C.] Stanford Univ, Stanford, CA 94305 USA.
[Lekien, Francois] Univ Libre Bruxelles, Ecole Polytech, B-1050 Brussels, Belgium.
[Paduan, Jeffrey D.] USN, Postgrad Sch, Monterey, CA 93943 USA.
[Chavez, Francisco P.] Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039 USA.
[Marsden, Jerrold E.] CALTECH, Control & Dynam Syst, Pasadena, CA 91125 USA.
RP Shadden, SC (reprint author), Stanford Univ, Stanford, CA 94305 USA.
EM sshadden@gmail.com
FU ASAP MURI; ONR-MURI [N00014-04-1-0534]
FX The research in this paper was supported in part by the ASAP MURI
project, ONR-MURI Contract N00014-04-1-0534.
NR 46
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PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0645
J9 DEEP-SEA RES PT II
JI Deep-Sea Res. Part II-Top. Stud. Oceanogr.
PD FEB
PY 2009
VL 56
IS 3-5
BP 161
EP 172
DI 10.1016/j.dsr2.2008.08.008
PG 12
WC Oceanography
SC Oceanography
GA 452MH
UT WOS:000266543600008
ER
PT J
AU Shulman, I
Rowley, C
Anderson, S
DeRada, S
Kindle, J
Martin, P
Doyle, J
Cummings, J
Ramp, S
Chavez, F
Fratantoni, D
Davis, R
AF Shulman, Igor
Rowley, Clark
Anderson, Stephanie
DeRada, Sergio
Kindle, John
Martin, Paul
Doyle, James
Cummings, James
Ramp, Steve
Chavez, Francisco
Fratantoni, David
Davis, Russ
TI Impact of glider data assimilation on the Monterey Bay model
SO DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
LA English
DT Article
DE Ocean data assimilation and reanalysis; Coastal processes; Ocean
predictability and prediction; Ocean observing systems; Upwelling
AB Glider observations were essential components of the observational program in the Autonomous Ocean Sampling Network (AOSN-II) experiment in the Monterey Bay area during summer of 2003. This paper is focused on the impact of the assimilation of glider temperature and salinity observations on the Navy Coastal Ocean Model (NCOM) predictions of surface and subsurface properties. The modeling system consists of an implementation of the NCOM model using a curvilinear, orthogonal grid with 1-4 km resolution, with finest resolution around the bay. The model receives open boundary conditions from a regional (9 km resolution) NCOM implementation for the California Current System, and surface fluxes from the Coupled Ocean-Atmosphere Mesoscale Prediction System (COAMPS) atmospheric model at 3 km resolution. The data assimilation component of the system is a version of the Navy Coupled Ocean Data Assimilation (NCODA) system, which is used for assimilation of the glider data into the NCOM model of the Monterey Bay area. The NCODA is a fully 3D multivariate optimum interpolation system that produces simultaneous analyses of temperature, salinity, geopotential, and vector velocity.
Assimilation of glider data improves the surface temperature at the mooring locations for the NCOM model hindcast and nowcasts, and for the short-range (1-1.5 days) forecasts. It is shown that it is critical to have accurate atmospheric forcing for more extended forecasts. Assimilation of glider data provided better agreement with independent observations (for example, with aircraft measured SSTs) of the model-predicted and observed spatial distributions of surface temperature and salinity. Mooring observations of subsurface temperature and salinity show sharp changes in the thermocline and halocline depths during transitions from upwelling to relaxation and vice versa. The non-assimilative run also shows these transitions in subsurface temperature; but they are not as well defined. For salinity, the non-assimilative run significantly differs from the observations. However, the glider data assimilating run is able to show comparable results with observations of thermocline as well as halocline depths during upwelling and relaxation events in the Monterey Bay area. It is also shown that during the relaxation of wind, the data assimilative run has higher value of subsurface velocity complex correlation with observations than the non-assimilative run. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Shulman, Igor; Rowley, Clark; Anderson, Stephanie; DeRada, Sergio; Kindle, John; Martin, Paul; Cummings, James] USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
[Doyle, James] USN, Res Lab, Marine Meteorol Div, Monterey, CA 93943 USA.
[Ramp, Steve] USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
[Chavez, Francisco] MBARI, Moss Landing, CA 95039 USA.
[Fratantoni, David] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA.
[Davis, Russ] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
RP Shulman, I (reprint author), USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
EM igor.shulman@nrlssc.navy.mil
RI Fratantoni, David/C-7121-2011;
OI Davis, Russ/0000-0003-1903-6313; Rowley, Clark/0000-0003-3496-6404
FU Naval Research Laboratory (NRL) [61153N, 7330-07-7115]; Office of Naval
Research; ONR [N0001405WX20794, N0001406WX20990]; Department of Defense
Major Shared Resource Centers, Aberdeen
FX This research was funded through the Naval Research Laboratory (NRL)
under Program Element 61153N sponsored by the Office of Naval Research,
and ONR Grants N0001405WX20794 and N0001406WX20990. We thank Peter
Sakalaukus of USM for programming and computer support. Computer time
for the numerical simulations was provided through a Grant from the
Department of Defense High Performance Computing Initiative.
Computational resources for COAMPS were supported in part by a Grant of
HPC time from the Department of Defense Major Shared Resource Centers,
Aberdeen, MD and Wright Patterson Air Force Base, OH. COAMPS is a
registered trademark of the Naval Research Laboratory. This manuscript
is NRL contribution # 7330-07-7115.
NR 13
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U1 2
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PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0645
J9 DEEP-SEA RES PT II
JI Deep-Sea Res. Part II-Top. Stud. Oceanogr.
PD FEB
PY 2009
VL 56
IS 3-5
BP 188
EP 198
DI 10.1016/j.dsr2.2008.08.003
PG 11
WC Oceanography
SC Oceanography
GA 452MH
UT WOS:000266543600010
ER
PT J
AU Rosenfeld, L
Shulman, I
Cook, M
Paduan, J
Shulman, L
AF Rosenfeld, Leslie
Shulman, Igor
Cook, Michael
Paduan, Jeff
Shulman, Lev
TI Methodology for a regional tidal model evaluation, with application to
central California
SO DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
LA English
DT Article
DE USA, California, Monterey Bay; Tidal model; Tidal currents; Internal
tides
ID MONTEREY SUBMARINE-CANYON; 3-DIMENSIONAL MODEL; INTERNAL WAVES;
CONTINENTAL-SHELF; NORTHERN CALIFORNIA; DATA ASSIMILATION;
VANCOUVER-ISLAND; OCEAN TIDES; CURRENTS; BAY
AB Observations from disparate observational assets, including tide gauges, moorings, and high-frequency (HF) radars, were used to depict the tidal variability, and to evaluate model tidal simulations, for a region off central California, including the Monterey Bay. For this study, the hydrodynamic model was forced only with tides derived from a large-scale model for the northeast Pacific Ocean. Homogeneous density, and initially horizontally uniform density stratification, cases were considered. The model successfully reproduced tidal sea-surface height variations within the model domain, as determined by comparisons with sea level or bottom pressure measured at six locations. To achieve tidal currents with realistic amplitudes, as determined from HF radar and moored measurements, it was found that barotropic velocity, as well as sea level, from the large-scale regional tidal model must be included in specifying the open-boundary condition. However, even with such forcing, the model with homogeneous density field under-predicted the semidiurnal and diurnal barotropic currents as estimated from depth-averaged currents measured at 11 locations. In the diurnal frequency band, the observed surface and nearshore depth-averaged currents are likely influenced by meteorological forcing, which was not included in the model.
The HF radar-measured surface tidal currents, both semidiurnal and diurnal, are consistent from year to year and between the winter season and the entire year. Semidiurnal surface tidal currents derived from year-long HF radar measurements do not resemble either the modeled or measured barotropic current fields. Rather, they exhibit amplitudes and small-scale spatial variability indicative of the presence of internal tides, thus indicating that model-derived barotropic tidal currents cannot be validated over large spatial extents using long time series of HF radar-derived surface currents. With initially horizontally uniform vertical density stratification, the model produced surface currents with spatial variability and amplitude range comparable to what was derived from HF radar surface current measurements, but the point by point comparisons are not impressive for this region of complex topography. Likewise, the subsurface current comparisons, performed at four deepwater locations, show considerable model-data differences. Possible reasons for these disparities include the effects of atmospheric forcing, spatially and temporally varying stratification, remotely generated coastally trapped waves, and remotely generated internal tides. Published by Elsevier Ltd.
C1 [Rosenfeld, Leslie; Cook, Michael; Paduan, Jeff] USN, Postgrad Sch, Monterey, CA 93943 USA.
[Shulman, Igor] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Shulman, Lev] Univ New Orleans, New Orleans, LA 70148 USA.
RP Rosenfeld, L (reprint author), USN, Postgrad Sch, Code OC Ro, Monterey, CA 93943 USA.
EM lkrosenf@nps.edu
FU ONR [N000-1403WR20009, N0001403WX21141]; Center for Integrated Marine
Technologies (CIMT); Naval Research Laboratory [NRL/PP/7330-04-5020]
FX The authors gratefully acknowledge ONR Grants N000-1403WR20009 (NPS) and
N0001403WX21141 (NRL) for supporting this work. USGS provided bottom
pressure data (Yellow Bank and Davenport) and MBARI supported NPS
collection of bottom pressure (MOISE) and current data (S2), and
directly provided other moored current data (M1 and M2). Mooring MO is
supported by the Center for Integrated Marine Technologies (CIMT). The
Partnership for Interdisciplinary Studies of Coastal Oceans (PISCO)
provided the current records off Sand Hill Bluff, Terrace Point and
Hopkins Marine Station. We also thank Steve Ramp (NPS) who deployed the
P moorings off Pt Sur and the AOSN moorings; Gary Egbert and Lana
Erofeeva (OSU) for providing tidal solutions for the West Coast; and
Paul Martin (NRL) for help with the interpolation of OSU model tidal
constants to the ICON model open boundaries. This manuscript is Naval
Research Laboratory contribution #NRL/PP/7330-04-5020.
NR 63
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U1 1
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PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0645
J9 DEEP-SEA RES PT II
JI Deep-Sea Res. Part II-Top. Stud. Oceanogr.
PD FEB
PY 2009
VL 56
IS 3-5
BP 199
EP 218
DI 10.1016/j.dsr2.2008.08.007
PG 20
WC Oceanography
SC Oceanography
GA 452MH
UT WOS:000266543600011
ER
PT J
AU Wang, XC
Chao, Y
Dong, CM
Farrara, J
Li, ZJ
McWilliams, JC
Paduan, JD
Rosenfeld, LK
AF Wang, Xiaochun
Chao, Yi
Dong, Changming
Farrara, John
Li, Zhijin
McWilliams, James C.
Paduan, Jeffrey D.
Rosenfeld, Leslie K.
TI Modeling tides in Monterey Bay, California
SO DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
LA English
DT Article
DE Monterey Bay; Barotropic tides; Baroclinic tides; Modeling; Energy flux;
High-frequency radar
ID INTERNAL TIDE; BOUNDARY-CONDITION; SUBMARINE-CANYON; BRITISH-COLUMBIA;
OCEAN; SYSTEM; WAVES; SIMULATION; GENERATION; RADIATION
AB In the process of developing a tide-permitting coastal ocean forecasting system, tidal signals are added to an oceanic general circulation model for Monterey Bay, California. The model, which is configured from the regional ocean modeling system (ROMS), has three one-way nested domains with the finest resolution of 1.6 km in the horizontal direction and 32 levels in the vertical direction. In present research, the tidal simulation of the system is validated against tide gauges, ADCP current observations, high-frequency radar surface-current observations, and compared with the output from two barotropic tidal models. The results indicate that the barotropic tides from the model compare well with observations in terms of sea-surface height, with discrepancies in amplitude of less than 10% of the amplitude of the most energetic M(2) constituent. However, the discrepancy for the barotropic tidal currents can reach 30% among models with similar accuracy in sea-surface height. The generation and propagation of baroclinic tides associated with the Monterey Submarine Canyon are qualitatively reproduced by the model with weaker strength. The surface tidal current simulation is improved, especially in terms of magnitude, when the model has a more realistic stratification through changes in both barotropic and baroclinic tidal Currents. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Wang, Xiaochun; Chao, Yi; Farrara, John; Li, Zhijin] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Wang, Xiaochun; Farrara, John] Raytheon ITSS, Pasadena, CA 91101 USA.
[Dong, Changming; McWilliams, James C.] Univ Calif Los Angeles, IGPP, Los Angeles, CA 90095 USA.
[Paduan, Jeffrey D.; Rosenfeld, Leslie K.] USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
RP Chao, Y (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr,M-S 300-323, Pasadena, CA 91109 USA.
EM ychao@jpl.nasa.gov
FU National Aeronautics and Space Administration; Office of Naval Research;
NOAA COTS; California Coastal Conservancy; NOAA [NA160C2936]
FX The research was carried out, in part, by the jet Propulsion Laboratory
(JPL), California Institute of Technology, under contract with the
National Aeronautics and Space Administration. The financial support was
provided by the Office of Naval Research through a subcontract from
Monterey Bay Aquarium Research Institute to Raytheon, and NOAA COTS
funding and California Coastal Conservancy through the COCMP program
(both through subcontracts from Scripps Institution of Oceanography/UCSD
to Raytheon). The long-term support from Drs. Emily Greene and Michael
Lampel at the Pasadena office of Raytheon is acknowledged. Computations
were performed on computers provided by the JPL Supercomputer Project
and the NASA Advanced Supercomputing Division at Ames Research Center.
High-frequency radar data were supported during this period by NOAA
award No. NA160C2936 to the Center for Integrated Marine Technologies
(CIMT). The authors would like to thank three anonymous reviewers for
their insightful and detailed comments. XCW would like to thank Dr.
Peggy Li, Mr. Quoc Vu, and Mrs. Hongchun Zhang for their technical help
and Drs. C. K. Shum, Eric Kunze, Gary Egbert, and Mike Foreman for
discussions.
NR 53
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PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0967-0645
J9 DEEP-SEA RES PT II
JI Deep-Sea Res. Part II-Top. Stud. Oceanogr.
PD FEB
PY 2009
VL 56
IS 3-5
BP 219
EP 231
DI 10.1016/j.dsr2.2008.08.012
PG 13
WC Oceanography
SC Oceanography
GA 452MH
UT WOS:000266543600012
ER
PT J
AU Vilcarrornero, S
Laguna-Torres, VA
Fernandez, C
Gotuzzo, E
Suarez, L
Cespedes, M
Aguilar, PV
Kochel, TJ
AF Vilcarrornero, Stalin
Laguna-Torres, V. Alberto
Fernandez, Connie
Gotuzzo, Eduardo
Suarez, Luis
Cespedes, Manuel
Aguilar, Patricia V.
Kochel, Tadeusz J.
TI Venezuelan Equine Encephalitis and Upper Gastrointestinal Bleeding in
Child
SO EMERGING INFECTIOUS DISEASES
LA English
DT Article
ID PERU; REGION
AB Venezuelan equine encephalitis (VEE) is reemerging in Peru. VEE virus subtype ID in Peru has not been previously associated with severe disease manifestations. In 2006, VEE virus subtype ID was isolated from a boy with severe febrile disease and gastrointestinal bleeding, the strain contained 2 mutations within the PE2 region.
C1 [Vilcarrornero, Stalin; Laguna-Torres, V. Alberto; Aguilar, Patricia V.; Kochel, Tadeusz J.] Naval Med Res Ctr Detachment, Lima, Peru.
[Fernandez, Connie] Hosp Yurimaguas, Loreto, Peru.
[Vilcarrornero, Stalin; Gotuzzo, Eduardo] Cayetano Heredia Univ, Lima, Peru.
[Suarez, Luis] Gen Directorate Epidemiol, Lima, Peru.
[Cespedes, Manuel] Minist Hlth, Natl Inst Hlth, Lima, Peru.
RP Aguilar, PV (reprint author), USN, Med Res Ctr Detachment, 3230 Lima Pl, Washington, DC 20521 USA.
EM particia.aguilar@med.navy.mil
RI Valle, Ruben/A-7512-2013;
OI Vilcarromero, Stalin/0000-0002-9097-0638
NR 9
TC 7
Z9 7
U1 0
U2 1
PU CENTERS DISEASE CONTROL
PI ATLANTA
PA 1600 CLIFTON RD, ATLANTA, GA 30333 USA
SN 1080-6040
J9 EMERG INFECT DIS
JI Emerg. Infect. Dis
PD FEB
PY 2009
VL 15
IS 2
BP 323
EP 325
DI 10.3201/eid1502.081018
PG 3
WC Immunology; Infectious Diseases
SC Immunology; Infectious Diseases
GA 405NE
UT WOS:000263230700030
PM 19193285
ER
PT J
AU Link, RE
Joyce, JA
Roe, C
AF Link, Richard E.
Joyce, James A.
Roe, Charles
TI Crack arrest testing of high strength structural steels for naval
applications
SO ENGINEERING FRACTURE MECHANICS
LA English
DT Article
DE Crack arrest; Dynamic fracture; Ductile-brittle transition; Marine
structures
ID STRESS-INTENSITY FACTOR; FRACTURE-TOUGHNESS; CONSTRUCTION
AB The crack arrest fracture toughness of two high strength steel alloys used in naval construction, HSLA-100, Composition 3 and HY-100, was characterized in this investigation. A greatly scaled-down version of the wide-plate crack arrest test was developed to characterize the crack arrest performance of these tough steel alloys in the upper region of the ductile-brittle transition. The specimen is a single edge-notched, 152 mm wide by 19 mm thick by 910 mm long plate subjected to a strong thermal gradient and a tensile loading. The thermal gradient is required to arrest the crack at temperatures high in the transition region, close to the expected service temperature for crack arrest applications in surface ships. Strain gages were placed along the crack path to obtain crack position and crack velocity data, and this data, along with the applied loading is combined in a "generation mode" analysis using finite element analysis to obtain a dynamic analysis of the crack arrest event. Detailed finite element analyses were conducted to understand the effect of various modeling assumptions on the results and to validate the methodology compared with more conventional crack arrest tests.
Brittle cracks initiation, significant cleavage crack propagation and subsequent crack arrest was achieved in all 15 of the tests conducted in this investigation. A crack arrest master curve approach was used to characterize and compare the crack arrest fracture toughness. The HSLA-100, Comp. 3 steel alloy had superior performance to the HY-100 steel alloy. The crack arrest reference temperature was T(KIA) = -136 degrees C for the HSLA-100 plate and T(KIA) = -64 degrees C for the HY-100 plate. Published by Elsevier Ltd.
C1 [Link, Richard E.; Joyce, James A.] USN Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
[Roe, Charles] USN, Ctr Surface Warfare, Carderock Div, Bethesda, MD USA.
RP Link, RE (reprint author), USN Acad, Dept Mech Engn, 590 Holloway Rd, Annapolis, MD 21402 USA.
EM link@usna.edu
NR 20
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U1 3
U2 14
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 FEB
PY 2009
VL 76
IS 3
BP 402
EP 418
DI 10.1016/j.engfracmech.2008.11.006
PG 17
WC Mechanics
SC Mechanics
GA 411CU
UT WOS:000263626400006
ER
PT J
AU Lohrenz, MC
Trafton, JG
Beck, MR
Gendron, ML
AF Lohrenz, Maura C.
Trafton, J. Gregory
Beck, Melissa R.
Gendron, Marlin L.
TI A Model of Clutter for Complex, Multivariate Geospatial Displays
SO HUMAN FACTORS
LA English
DT Article
ID VISUAL-SEARCH; SIMILARITY; TARGET
AB Objective: A novel model of measuring clutter in complex geospatial displays was compared with human ratings of subjective clutter as a measure of convergent validity. The new model is called the color-clustering clutter (0) model. Background: Clutter is a known problem in displays of complex data and has been shown to affect target search performance. Previous clutter models are discussed and compared with the C3 model. Method: Two experiments were performed. In Experiment 1, participants performed subjective clutter ratings on six classes of information visualizations. Empirical results were used to set two free parameters in the model. In Experiment 2, participants performed subjective clutter ratings on aeronautical charts. Both experiments compared and correlated empirical data to model predictions. Results: The first experiment resulted in a .76 correlation between ratings and C3. The second experiment resulted in a .86 correlation, significantly better than results from a model developed by Rosenholtz et al. Outliers to our correlation suggest further improvements to C3. Conclusions: We suggest that (a) the C3 model is a good predictor of subjective impressions of clutter in geospatial displays, (b) geospatial clutter is a function of color density and saliency (primary C3 components), and (c) pattern analysis techniques could further improve C3. Application: The C3 model could be used to improve the design of electronic geospatial displays by suggesting when a display will be too cluttered for its intended audience.
C1 [Lohrenz, Maura C.; Gendron, Marlin L.] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Trafton, J. Gregory] USN, Res Lab, Intelligent Syst Sect, Washington, DC 20375 USA.
[Beck, Melissa R.] Louisiana State Univ, Dept Psychol, Baton Rouge, LA 70803 USA.
RP Lohrenz, MC (reprint author), USN, Res Lab, Code 7440-1, Stennis Space Ctr, MS 39529 USA.
EM mlohrenz@nrlssc.navy.mil
RI Beck, Melissa/F-4811-2010
FU Naval Research Laboratory 6.2 Base Program [P.E.602435N]
FX This work was sponsored by the Naval Research Laboratory 6.2 Base
Program (P.E.602435N) awarded to the first author. We thank Geary Layne
and Stephanie Myrick for their important contributions. We thank the
Psychology Departments at George Mason University (GMU) and Louisiana
State University (LSU) for providing resources and students to
participate in experiments, and Mirka Vomela (GMU) and Maghan Ferguson
(LSU) for their assistance. The views and conclusions expressed in this
document do not represent official policies of the U.S. Navy.
NR 25
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U1 0
U2 2
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0018-7208
J9 HUM FACTORS
JI Hum. Factors
PD FEB
PY 2009
VL 51
IS 1
BP 90
EP 101
DI 10.1177/0018720809333518
PG 12
WC Behavioral Sciences; Engineering, Industrial; Ergonomics; Psychology,
Applied; Psychology
SC Behavioral Sciences; Engineering; Psychology
GA 446WS
UT WOS:000266152800008
PM 19634312
ER
PT J
AU Kompella, S
Mao, SW
Hou, YT
Sherali, HD
AF Kompella, Sastry
Mao, Shiwen
Hou, Y. Thomas
Sherali, Hanif D.
TI On Path Selection and Rate Allocation for Video in Wireless Mesh
Networks
SO IEEE-ACM TRANSACTIONS ON NETWORKING
LA English
DT Article
DE Cross-layer design; optimization; path selection; rate allocation; video
communications; wireless mesh network
AB Multi-path transport is an important mechanism for supporting video communications in multihop wireless networks. In this paper, we investigate the joint problem of optimal path selection and rate allocation for multiple video sessions in a wireless mesh network. We present a mathematical formulation to optimize the application level performance (i.e., video distortion) in the context of path selection and rate allocation. For this complex optimization problem, we propose a branch-and-bound based solution procedure, embedded with the Reformulation-Linearization Technique (RLT) that can produce (1 - epsilon)-optimal solutions for any small epsilon. This result is significant as it not only provides theoretical understanding of this problem, but also offers a performance benchmark for any future proposed distributed algorithm and protocol for this problem. Simulation results are also provided to demonstrate the efficacy of the solution procedure.
C1 [Hou, Y. Thomas] Virginia Tech, Dept Elect & Comp Engn, Blacksburg, VA 24061 USA.
[Sherali, Hanif D.] Virginia Tech, Dept Ind & Syst Engn, Blacksburg, VA 24061 USA.
RP Kompella, S (reprint author), USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
EM smao@ieee.org; thou@vt.edu; hanifs@vt.edu
FU Office of Naval Research [N00014-03-1-0521, N00014-05-1-048]; National
Science Foundation [DGE-9987586, CNS-0347390, DMI-0552676]
FX Manuscript received November 10, 2005; revised December 12. 2006 and
November 09, 2007; approved by IEEE/ACM TPANSACTIONS ON NETWORKING
Editor M. Krunz. First published July 02. 2008: current version
published February 19. 2009. This work was supported by the Office of
Naval Research under Grants N00014-03-1-0521 and N00014-05-1-048 Land by
the National Science Foundation under Grants DGE-9987586. CNS-0347390
and DMI-0552676.
NR 21
TC 42
Z9 48
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1063-6692
EI 1558-2566
J9 IEEE ACM T NETWORK
JI IEEE-ACM Trans. Netw.
PD FEB
PY 2009
VL 17
IS 1
BP 212
EP 224
DI 10.1109/TNET.2008.925942
PG 13
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods; Engineering, Electrical & Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA 410UT
UT WOS:000263604500017
ER
PT J
AU Sarkar, TK
Burintramart, S
Yilmazer, N
Zhang, Y
De, A
Salazar-Palma, M
Lagunas, MA
Mokole, EL
Wicks, MC
AF Sarkar, Tapan K.
Burintramart, Santana
Yilmazer, Nuri
Zhang, Yu
De, Arijit
Salazar-Palma, Magdalena
Lagunas, Miguel A.
Mokole, Eric L.
Wicks, Michael C.
TI Comment on "A Look at the Concept of Channel Capacity from a Maxwellian
Viewpoint" Reply
SO IEEE ANTENNAS AND PROPAGATION MAGAZINE
LA English
DT Letter
C1 [Sarkar, Tapan K.; Burintramart, Santana; Yilmazer, Nuri; Zhang, Yu; De, Arijit] Syracuse Univ, Dept Elect Engn & Comp Sci, Syracuse, NY 13244 USA.
[Salazar-Palma, Magdalena] Univ Carlos III Madrid, Dept Teoria Senal & Comunicac, Madrid 28911, Spain.
[Lagunas, Miguel A.] CTTC, Barcelona 08860, Spain.
[Mokole, Eric L.] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
[Wicks, Michael C.] AFRL SN, Rome, NY 13441 USA.
RP Sarkar, TK (reprint author), Syracuse Univ, Dept Elect Engn & Comp Sci, Syracuse, NY 13244 USA.
EM tksarkar@syr.edu; sburintr@syr.edu; nyilmaze@syr.edu; yzhang39@syr.edu;
ade@syr.edu; m.salazar-palma@ieee.org; m.a.lagunas@cttc.es;
eric.mokole@nrl.navy.mil; michael.wicks@rl.af.mil
RI Lagunas, Miguel/N-9255-2014; Salazar Palma, Magdalena/C-4447-2015
OI Lagunas, Miguel/0000-0003-3338-244X;
NR 1
TC 0
Z9 0
U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1045-9243
EI 1558-4143
J9 IEEE ANTENN PROPAG M
JI IEEE Antennas Propag. Mag.
PD FEB
PY 2009
VL 51
IS 1
BP 164
EP 166
DI 10.1109/MAP.2009.4939055
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 431UU
UT WOS:000265090500017
ER
PT J
AU Lambert, JR
Balanis, CA
DeCarlo, D
AF Lambert, Jeremy R.
Balanis, Constantine A.
DeCarlo, Dennis
TI Spherical Cap Adaptive Antennas for GPS
SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
LA English
DT Article
DE Adaptive antenna arrays; controlled reception pattern antenna (CRPA);
GPS; non-planar; power minimization
ID ALGORITHM; ARRAYS
AB The capability of non-planar adaptive antennas for suppressing interference in GPS applications is addressed. An optimization problem based on power minimization of incident signals is formulated, resulting in a solution that maximizes the signal-to-interference-plus-noise ratio at the output of the antenna array and subsequently the carrier-to-noise-ratio of a GPS satellite signal. Spherical adaptations of a planar seven element controlled reception pattern antenna array are presented for various low-horizon interference environments.
C1 [Lambert, Jeremy R.; Balanis, Constantine A.] Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA.
[DeCarlo, Dennis] Naval Air Syst Command, Radar & Antenna Syst Div, Patuxent River, MD 20670 USA.
RP Lambert, JR (reprint author), Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA.
EM jeremy.lambert@asu.edu; balanis@asu.edu
FU Radar and Antenna Systems Division of the Naval Air Systems Command
(NAVAIR), Patuxent River, MD
FX This work was supported by the Advanced Helicopter Electromagnetics
(AHE) Program with funding from the Radar and Antenna Systems Division
of the Naval Air Systems Command (NAVAIR), Patuxent River, MD.
NR 12
TC 15
Z9 15
U1 0
U2 3
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 FEB
PY 2009
VL 57
IS 2
BP 406
EP 413
DI 10.1109/TAP.2008.2011219
PG 8
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 444MI
UT WOS:000265984700012
ER
PT J
AU Nichols, JM
AF Nichols, J. M.
TI Frequency Distortion of Second- and Third-Order Phase-Locked Loop
Systems Using a Volterra-Series Approximation
SO IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
LA English
DT Article
DE Frequency distortion; nonlinearity; phase-locked loop (PLL); Volterra
series
ID PLL-FM DEMODULATOR; HARMONIC DISTORTION; NONLINEAR BEHAVIOR;
BIFURCATION; CHAOS
AB In this paper, the frequency distortion for the nonlinear phase-locked loop (PLL) is derived analytically using a Volterra-series approximation. Both first- and second-order filters are considered in the PLL architecture. Theoretical results are then compared to those obtained via simulation. Comparisons are drawn between the two types of PLL with regard to the amount of distortion observed. Convergence of the Volterra-series solution is also discussed with regard to the system parameters.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Nichols, JM (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM jonathan.nichols@nrl.navy.mil
FU Naval Research Laboratory
FX This work was supported by the Naval Research Laboratory. This paper was
recommended by Associate Editor B. C. Levy.
NR 20
TC 5
Z9 5
U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 1549-8328
J9 IEEE T CIRCUITS-I
JI IEEE Trans. Circuits Syst. I-Regul. Pap.
PD FEB
PY 2009
VL 56
IS 2
BP 453
EP 459
DI 10.1109/TCSI.2008.2001804
PG 7
WC Engineering, Electrical & Electronic
SC Engineering
GA 409AQ
UT WOS:000263479000016
ER
PT J
AU Salmeron, J
Wood, K
Baldick, R
AF Salmeron, Javier
Wood, Kevin
Baldick, Ross
TI Worst-Case Interdiction Analysis of Large-Scale Electric Power Grids
SO IEEE TRANSACTIONS ON POWER SYSTEMS
LA English
DT Article
DE Failure analysis; load flow analysis; power system security
ID SECURITY; THREAT; SYSTEM
AB This paper generalizes Benders decomposition to maximize a nonconcave objective function and uses that decomposition to solve an "electric power grid interdiction problem." Under one empirically verified assumption, the solution to this bilevel optimization problem identifies a set of components, limited by cardinality or "interdiction resource," whose destruction maximizes economic losses to customers (and can thereby guide defensive measures). The decomposition subproblem typically incorporates a set of do optimal power-flow models that cover various states of repair after an attack, along with a load-duration curve. Test problems describe a regional power grid in the United States with approximately 5000 buses, 6000 lines, and 500 generators. Solution time on a 2-GHz personal computer is approximately one hour.
C1 [Salmeron, Javier; Wood, Kevin] USN, Postgrad Sch, Monterey, CA 93943 USA.
[Baldick, Ross] Univ Texas Austin, Austin, TX 78712 USA.
RP Salmeron, J (reprint author), USN, Postgrad Sch, Monterey, CA 93943 USA.
EM jsalmero@nps.edu; kwood@nps.edu; baldick@mail.utexas.edu
OI Wood, Kevin/0000-0002-0311-8712
FU U.S. Department of Energy [DE-AI02-05ER25670]; Office of Naval Research;
Air Force Office of Scientific Research
FX This work was supported in part by the U.S. Department of Energy
(DE-AI02-05ER25670), in part by the Office of Naval Research, and in
part by the Air Force Office of Scientific Research. Paper no.
TPWRS-00945-2007.
NR 18
TC 59
Z9 61
U1 2
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA
SN 0885-8950
J9 IEEE T POWER SYST
JI IEEE Trans. Power Syst.
PD FEB
PY 2009
VL 24
IS 1
BP 96
EP 104
DI 10.1109/TPWRS.2008.2004825
PG 9
WC Engineering, Electrical & Electronic
SC Engineering
GA 399RO
UT WOS:000262817200011
ER
PT J
AU Fish, FE
Timm, LL
Murray, MM
Howle, LE
AF Fish, F. E.
Timm, L. L.
Murray, M. M.
Howle, L. E.
TI Ecological morphology of the flippers of cetaceans based on
two-dimensional geometry
SO INTEGRATIVE AND COMPARATIVE BIOLOGY
LA English
DT Meeting Abstract
CT Annual Meeting of the Society-for-Integrative-and-Comparative-Biology
CY JAN 03-07, 2009
CL Boston, MA
SP Soc Integrat & Comparat Biol
C1 W Chester Univ, W Chester, PA USA.
USN Acad, Annapolis, MD 21402 USA.
Duke Univ, Durham, NC 27706 USA.
EM ffish@wcupa.edu
NR 0
TC 0
Z9 0
U1 0
U2 2
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 1540-7063
J9 INTEGR COMP BIOL
JI Integr. Comp. Biol.
PD FEB
PY 2009
VL 49
BP E229
EP E229
PG 1
WC Zoology
SC Zoology
GA 481KL
UT WOS:000268808800911
ER
PT J
AU Tsukayama, P
Lucas, C
Bacon, DJ
AF Tsukayama, Pablo
Lucas, Carmen
Bacon, David J.
TI Typing of four genetic loci discriminates among closely related species
of New World Leishmania
SO INTERNATIONAL JOURNAL FOR PARASITOLOGY
LA English
DT Article
DE Leishmaniasis; MLEE; Leishmania (Viannia); Sequence-based typing
ID VIANNIA BRAZILIENSIS; GEOGRAPHIC-DISTRIBUTION; MOLECULAR EPIDEMIOLOGY;
EVOLUTIONARY GENETICS; DONOVANI COMPLEX; PARASITES; HYBRIDS;
POLYMORPHISM; POPULATIONS; PERUVIANA
AB All New World Leishmania species can cause cutaneous lesions, while only Leishmania (Viannia) braziliensis has been associated with mucosal metastases. Multilocus enzyme electrophoresis (MLEE) is the optimal standard for species identification but is slow and costly. New methods for species identification are needed to ensure proper identification and therapy. The coding regions of four metabolic enzyme markers in the MLEE typing method: mannose phosphate isomerase (MPI), malate dehydrogenase (MDH), glucose-6-phosphate isomerase (GPI), and 6-phosphogluconate dehydrogenase (6PGD), were analysed from seven species of New World Leishmania isolated from patients with either cutaneous or mucosal lesions to identify specific genetic polymorphisms responsible for the phenotypic variations observed in the MLEE typing scheme. We identified species-specific polymorphisms and determined that a combination of sequencing of the mpi and 6pgd genes was sufficient to differentiate among seven closely related species of New World Leishmania and among isolates of L braziliensis shown previously to have atypical MLEE patterns. When DNA isolated from 10 cutaneous lesion biopsies were evaluated, the sequence typing method was 100% concordant with the published MLEE/monoclonal antibody identification methods. The identification of species-specific polymorphisms can be used to design a DNA-based test with greater discriminatory power that requires shorter identification times. When the causative agent of the disease is L braziliensis, this method ensures correct species identification, even when the agent is a genetic variant. Proper identification could facilitate adequate treatment, preventing the onset of the disfiguring mucosal form of the disease. Published by Elsevier Ltd. on behalf of Australian Society for Parasitology Inc.
C1 [Tsukayama, Pablo; Lucas, Carmen; Bacon, David J.] USN, Med Res Ctr, Parasitol Program, Lima, Peru.
RP Bacon, DJ (reprint author), USN, Environm & Preventat Med Unit 2, Lab Serv, 1887 Powhatan St, Norfolk, VA 23511 USA.
EM david.bacon@med.navy.mil
FU Department of Defense-Global Emerging Infectious System (DoD-GEIS)
[847705.82000.256B, B0016]
FX We would like to thank Dr. Ivan Velez for supplying Leishmania
panamensis strains and clinical material used in this study. The views
expressed in this article are those of the authors and do not
necessarily reflect the official policy of the Department of the Navy,
Department of Defense, nor the US government. This work was supported by
funds provided by the Department of Defense-Global Emerging Infectious
System (DoD-GEIS) under the unit number 847705.82000.256B,B0016. One of
the authors is a military service member (DJB). This work was prepared
as part of his official duties. Title 17 U.S.C. 105 provides that
"Copyright protection under this title is not available for any work of
the United States Government." Title 17 U.S.C. 101 defines a U.S.
Government work as a work prepared by a military service member or
employee of the U.S. Government as part of that person's official
duties. The use of clinical samples was approved by the Naval Medical
Research Center Detachment's Institutional Review Board in compliance
with all applicable Federal regulations governing the protection of
human subjects (approval number PJT-NMRCD.009).
NR 30
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U1 1
U2 3
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0020-7519
J9 INT J PARASITOL
JI Int. J. Parasit.
PD FEB
PY 2009
VL 39
IS 3
BP 355
EP 362
DI 10.1016/j.ijpara.2008.08.004
PG 8
WC Parasitology
SC Parasitology
GA 412FQ
UT WOS:000263710000010
PM 18817779
ER
PT J
AU Caton, PA
Pruitt, JT
AF Caton, P. A.
Pruitt, J. T.
TI Homogeneous charge compression ignition of hydrogen in a single-cylinder
diesel engine
SO INTERNATIONAL JOURNAL OF ENGINE RESEARCH
LA English
DT Article
DE homogeneous charge compression ignition; HCCI; homogeneous combustion;
low temperature combustion; nitric oxides; diesel; combustion efficiency
AB Homogeneous charge compression ignition (HCCI) of hydrogen was studied using a single-zone model based in chemical reaction kinetics and using a single-cylinder Cooperative Fuels Research (CFR) diesel engine. Comparison was made with conventional diesel combustion at the same compression ratio and load. Simulation indicated that hydrogen HCCI should be feasible at compression ratios around 18 with intake heating to 100 degrees C, with peak efficiency occurring for moderately dilute equivalence ratios (0.2-0.5) with the minimum possible amount of intake heating. Experimental hydrogen HCCI was achieved with intake heating to 80 degrees C and 100 degrees C for equivalence ratios between 0.15 and 0.37. Hydrogen HCCI exhibited unburned hydrogen emissions of the order of 0.5-1.0 per cent, corresponding to combustion efficiencies of 90-95 per cent. Emissions of nitric oxides were typically below 1 ppm and were at least two orders of magnitude lower than a comparable diesel cycle. Efficiency of hydrogen HCCI was lower than a comparable diesel cycle owing primarily to higher thermal losses and higher chemical enthalpy losses (lower combustion efficiency). These losses are hypothesized to depend strongly on surface area-volume ratio, and methods of mitigating these losses suggest how an engine could be designed to employ hydrogen HCCI.
C1 [Caton, P. A.; Pruitt, J. T.] USN Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
RP Caton, PA (reprint author), USN Acad, Dept Mech Engn, 590 Holloway Rd, Annapolis, MD 21402 USA.
EM patcaton@usna.edu
FU Naval Academy Research Council; Office of Naval Research
[N0001407WR20077]
FX The authors would like to thank Dr Jim Cowart for helpful discussions
and Mr John Hein, Mr Charlie Baesch, Mr Bob Banks, and Mr Bob Woody for
their expert assistance in maintaining the experimental apparatus. This
work was supported by the Naval Academy Research Council, and the second
author (J.T.P.) gratefully acknowledges the Office of Naval Research for
partial support of this work on funding document N0001407WR20077 (FY08).
NR 28
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Z9 9
U1 0
U2 3
PU PROFESSIONAL ENGINEERING PUBLISHING LTD
PI WESTMINISTER
PA 1 BIRDCAGE WALK, WESTMINISTER SW1H 9JJ, ENGLAND
SN 1468-0874
J9 INT J ENGINE RES
JI Int. J. Engine Res.
PD FEB
PY 2009
VL 10
IS 1
BP 45
EP 63
DI 10.1243/14680874JER02208
PG 19
WC Thermodynamics; Engineering, Mechanical; Transportation Science &
Technology
SC Thermodynamics; Engineering; Transportation
GA 439YS
UT WOS:000265664500004
ER
PT J
AU Davis, TA
Stojadinovic, A
Anam, K
Amare, M
Naik, S
Peoples, GE
Tadaki, D
Elster, EA
AF Davis, Thomas A.
Stojadinovic, Alexander
Anam, Khairul
Amare, Mihret
Naik, Shruti
Peoples, George E.
Tadaki, Douglas
Elster, Eric A.
TI Extracorporeal shock wave therapy suppresses the early proinflammatory
immune response to a severe cutaneous burn injury
SO INTERNATIONAL WOUND JOURNAL
LA English
DT Article
DE Burns; Chemokines; Extracorporeal shock wave therapy; Inflammation;
Wound healing
AB Following severe burn injury, persistent inflammation perpetuated by surface eschar, bacterial colonisation and neutrophil proteolytic activity can impede normal healing and result in further tissue damage. Extracorporeal shock wave treatment (ESWT) has been shown in the clinical setting to promote the healing of burn and difficult-to-heal wounds; however, the mechanism is unclear. We investigated the role of ESWT on the early proinflammatory response using a severe, full-thickness and highly inflammatory cutaneous burn wound in a murine model. Various wound-healing parameters were measured and leukocyte infiltration quantitated. A panel of 188 candidate genes known to be involved in acute inflammation and wound healing was screened. We show that ESWT of burn wounds 1 hour postwounding significantly blunts polymorphonuclear neutrophil and macrophage infiltration into the wound. ESWT treatment potently attenuates both CC- and CXC-chemokine expression, acute proinflammatory cytokine expression and extracellular matrix proteolytic activity at the wound margin. Given these findings and the clinical success of ESWT, we speculate that ESWT may be a potential therapeutic modality to treat severe wounds wherein excessive inflammatory responses involving increased levels of inflammatory cells, proinflammatory cytokines and proteases may become self-resolving allowing wound healing to progresses by way of normal physiological repair processes.
C1 [Davis, Thomas A.; Anam, Khairul; Amare, Mihret; Naik, Shruti; Tadaki, Douglas; Elster, Eric A.] USN, Med Res Ctr, Dept Regenerat Med, Silver Spring, MD 20910 USA.
[Stojadinovic, Alexander] Walter Reed Army Med Ctr, Dept Surg, Combat Wound Initiat, Washington, DC 20307 USA.
[Stojadinovic, Alexander; Peoples, George E.; Tadaki, Douglas; Elster, Eric A.] Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD USA.
[Peoples, George E.] Brooke Army Med Ctr, Dept Surg, Combat Wound Initiat, Ft Sam Houston, TX 78234 USA.
[Elster, Eric A.] Natl Naval Med Ctr, Dept Surg, Combat Wound Initiat, Bethesda, MD USA.
RP Davis, TA (reprint author), USN, Med Res Ctr, Dept Regenerat Med, Room 2A10,503 Robert Grant Ave, Silver Spring, MD 20910 USA.
EM thomas.davis1@med.navy.mil
FU Office of Naval Research (ONR) work unit [601153N.4508.519.A0508]
FX We thank Tissue Regenerative Technologies Inc. (Woodstock, GA, USA) for
the use of the DermaGold shock wave instrument. This work was supported
by the Office of Naval Research (ONR) work unit 601153N.4508.519.A0508.
NR 36
TC 56
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U1 1
U2 2
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1742-4801
J9 INT WOUND J
JI Int. Wound J.
PD FEB
PY 2009
VL 6
IS 1
BP 11
EP 21
DI 10.1111/j.1742-481X.2008.00540.x
PG 11
WC Dermatology; Surgery
SC Dermatology; Surgery
GA V16BS
UT WOS:000207845700003
PM 19291111
ER
PT J
AU Chang, WT
Alldredge, LMB
Kirchoefer, SW
Pond, JM
AF Chang, Wontae
Alldredge, L. M. B.
Kirchoefer, Steven W.
Pond, Jeffrey M.
TI Device loss of (Ba,Sr)TiO3 film-based capacitors at 1-20 GHz
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE barium compounds; dielectric losses; ferroelectric capacitors;
ferroelectric thin films; strontium compounds; thin film capacitors
ID PULSED LASER DEPOSITION; CAD MODELS
AB Device loss of BaxSr1-xTiO3 (BST, x=0.5 and 0.6) film-based interdigitated capacitors as a function of frequency (1-20 GHz) at room temperature is observed to range broadly from less than 0.01 to larger than 1 while the commonly observed device losses are around 0.05. Frequency dependence of the device loss tends to be larger for the higher device losses (>0.05) and at the higher frequencies (>10 GHz). The various characteristics of the microwave device loss are examined by analyzing the complex power applied in the devices, P=P-active+jP(reactive), where P-active is the dissipated power and P-reactive is the stored power in the devices. The dissipated power at the devices (P-active), subsequently resulting in the device loss, e.g., device loss=-P-active/P-reactive, is well fitted with the dissipated powers associated with the dielectric resistance and the electrode resistance (including the conduction and radiation resistances) of the devices.
C1 [Chang, Wontae; Alldredge, L. M. B.; Kirchoefer, Steven W.; Pond, Jeffrey M.] USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
RP Chang, WT (reprint author), USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
EM chang@estd.nrl.navy.mil
NR 9
TC 1
Z9 1
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD FEB 1
PY 2009
VL 105
IS 3
AR 034115
DI 10.1063/1.3073872
PG 8
WC Physics, Applied
SC Physics
GA 408BZ
UT WOS:000263409700089
ER
PT J
AU Ruth, RA
AF Ruth, Richard A.
TI Seditious Histories: Contesting Thai and Southeast Asian Pasts
SO JOURNAL OF ASIAN STUDIES
LA English
DT Book Review
C1 [Ruth, Richard A.] USN Acad, Annapolis, MD 21402 USA.
RP Ruth, RA (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 1
U2 1
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0021-9118
J9 J ASIAN STUD
JI J. Asian Stud.
PD FEB
PY 2009
VL 68
IS 1
BP 337
EP 340
DI 10.1017/S002191180900059X
PG 4
WC Area Studies; Asian Studies
SC Area Studies; Asian Studies
GA 407RJ
UT WOS:000263381700058
ER
PT J
AU Morse, JS
Schallhorn, SC
Hettinger, K
Tanzer, D
AF Morse, Jennifer S.
Schallhorn, Steven C.
Hettinger, Keith
Tanzer, David
TI Role of depressive symptoms in patient satisfaction with visual quality
after laser in situ keratomileusis
SO JOURNAL OF CATARACT AND REFRACTIVE SURGERY
LA English
DT Article; Proceedings Paper
CT Annual Meeting of the
American-Society-of-Cataract-and-Refractive-Surgery
CY APR, 2008
CL Chicago, IL
SP Amer Soc Cataract & Refract Surg
ID OF-LIFE; REFRACTIVE SURGERY; SEX-DIFFERENCES; PRIMARY-CARE; PUPIL SIZE;
MYOPIA; OUTCOMES; VISION; PREDICTORS; SEVERITY
AB PURPOSE: To assess the role of depressive symptoms in patient satisfaction with visual quality after laser in situ keratomileusis (LASIK).
SETTING: Navy Refractive Surgery Center, Ophthalmology Department, Naval Medical Center, San Diego, California, USA.
METHODS: This was a prospective study of active-duty military patients having bilateral conventional LASIK to treat low to moderate myopia with or without astigmatism. Patients completed the Armstrong Laboratory Personality Survey Depression scale preoperatively. Patients were also given a 10-point Navy questionnaire that included an assessment of patient satisfaction with visual quality at the 1 - and 6-month follow-up examinations. Patients were stratified by their visual quality rating after LASIK as highly satisfied, satisfied, and less satisfied and by their depression scale score into low, medium, and high groups. A proportional odds model was developed to compare the visual quality rating between the 3 depression groups 1 and 6 months post LASIK.
RESULTS: The study comprised 370 patients. An uncorrected visual acuity of at least 20/20 was achieved in 88.6% of eyes, Patients with higher levels of depressive symptoms had 3.0 times higher odds (95% confidence interval [Cl], 1.2 to 7.4) of being less satisfied than those with low levels of depressive symptoms 1 month after LASIK (P <=.02) and 2.5 times higher odds (95% Cl, 1.0 to 6.5) of being less satisfied at 6 months (P <=.06).
CONCLUSION: Preoperative depressive symptoms were a significant contributor to patient satisfaction with visual quality after LASIK.
C1 [Tanzer, David] USN, Med Ctr, Navy Refract Surg Ctr, Dept Ophthalmol, San Diego, CA 92152 USA.
RP Morse, JS (reprint author), POB 710402, San Diego, CA 92171 USA.
EM jmorsemd@aol.com
NR 38
TC 7
Z9 9
U1 0
U2 1
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0886-3350
J9 J CATARACT REFR SURG
JI J. Cataract. Refract. Surg.
PD FEB
PY 2009
VL 35
IS 2
BP 341
EP 346
DI 10.1016/j.jcrs.2008.10.046
PG 6
WC Ophthalmology; Surgery
SC Ophthalmology; Surgery
GA 409IF
UT WOS:000263498700030
PM 19185253
ER
PT J
AU O'Sullivan, DW
Crouch, CC
AF O'Sullivan, Daniel W.
Crouch, Collier C.
TI Illustrating the Concept of Sparingly Soluble Salts Using Various Copper
Compounds
SO JOURNAL OF CHEMICAL EDUCATION
LA English
DT Article
ID SOLUBILITY PRODUCTS
C1 [O'Sullivan, Daniel W.; Crouch, Collier C.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
RP O'Sullivan, DW (reprint author), USN Acad, Dept Chem, Annapolis, MD 21402 USA.
EM osulliva@usna.edu
OI O'Sullivan, Daniel/0000-0001-9104-5703
FU National Science Foundation Physical Meteorology Program [ATM-0343968]
FX This work was support by a grant to DWO from the National Science
Foundation Physical Meteorology Program, ATM-0343968. The manuscript was
markedly improved by the thoughtful comments from several reviewers.
NR 13
TC 2
Z9 2
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0021-9584
J9 J CHEM EDUC
JI J. Chem. Educ.
PD FEB
PY 2009
VL 86
IS 2
BP 202
EP 205
PG 4
WC Chemistry, Multidisciplinary; Education, Scientific Disciplines
SC Chemistry; Education & Educational Research
GA 398FQ
UT WOS:000262718400019
ER
PT J
AU Satter, EK
Metcalf, J
Lountzis, N
Elston, DM
AF Satter, Elizabeth K.
Metcalf, John
Lountzis, Nektarios
Elston, Dirk M.
TI Tumors composed of malignant epithelial and melanocytic populations: a
case series and review of the literature
SO JOURNAL OF CUTANEOUS PATHOLOGY
LA English
DT Article
ID BASAL-CELL CARCINOMA; MELANOMA IN-SITU; LENTIGO MALIGNA; COLLISION
TUMOR; BURN SCAR; BASOMELANOCYTIC TUMOR; INVASIVE MELANOMA; SKIN;
ASSOCIATION
AB Over the last 30 years, there have been approximately 49 case reports of tumors composed of both malignant epithelial and malignant melanocytic populations. Herein, we present four additional cases of combined tumors that consist of two phenotypically distinct but intermingled populations of malignant cells. Each tumor was composed of an invasive melanoma closely associated with either a basal cell carcinoma or a squamous cell carcinoma. We review all previous case reports in the English literature and attempt to clarify the terminology and summarize what is currently known about these unique tumors.
Satter EK, Metcalf J, Lountzis N, Elston D. Tumors composed of malignant epithelial and melanocytic populations: a case series and review of the literature.J Cutan Pathol 2009; 36: 211-219. (C) 2008 Blackwell Munksgaard.
C1 [Satter, Elizabeth K.] USN, Med Ctr, Dept Dermatol, San Diego, CA 92134 USA.
[Satter, Elizabeth K.] USN, Med Ctr, Dept Pathol, San Diego, CA 92134 USA.
[Metcalf, John; Elston, Dirk M.] Med Univ S Carolina, Dept Lab Serv, Charleston, SC 29425 USA.
[Lountzis, Nektarios] Geisinger Hlth Syst, Dept Dermatol, Danville, PA 17822 USA.
Geisinger Hlth Syst, Dept Dermatol & Lab Med, Danville, PA 17822 USA.
RP Satter, EK (reprint author), USN, Med Ctr, Dept Dermatol, 34520 Bob Wilson Dr,Suite 300, San Diego, CA 92134 USA.
EM elizabeth.satter@med.navy.mil
NR 37
TC 17
Z9 17
U1 0
U2 0
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0303-6987
J9 J CUTAN PATHOL
JI J. Cutan. Pathol.
PD FEB
PY 2009
VL 36
IS 2
BP 211
EP 219
DI 10.1111/j.1600-0560.2008.01000.x
PG 9
WC Dermatology; Pathology
SC Dermatology; Pathology
GA 397BS
UT WOS:000262637500005
PM 18727668
ER
PT J
AU Masterson, DM
AF Masterson, Daniel M.
TI Mexican Immigration to the United States
SO JOURNAL OF LATIN AMERICAN STUDIES
LA English
DT Book Review
C1 [Masterson, Daniel M.] USN Acad, Annapolis, MD 21402 USA.
RP Masterson, DM (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-216X
J9 J LAT AM STUD
JI J. Lat. Am. Stud.
PD FEB
PY 2009
VL 41
BP 213
EP 214
DI 10.1017/S0022216X08005506
PN 1
PG 2
WC Area Studies; Humanities, Multidisciplinary
SC Area Studies; Arts & Humanities - Other Topics
GA 423OP
UT WOS:000264505900042
ER
PT J
AU Maldonado, C
Diaz, D
Ranallo, J
Painter, R
Dahir, W
Hassouna, D
Gayer, B
Toss, E
Martinez, I
Stoyanov, P
Ogren, J
Lee, EW
Piatkowski, D
Hilty, J
Es-Said, OS
AF Maldonado, C.
Diaz, D.
Ranallo, J.
Painter, R.
Dahir, W.
Hassouna, D.
Gayer, B.
Toss, E.
Martinez, I.
Stoyanov, P.
Ogren, J.
Lee, E. W.
Piatkowski, D.
Hilty, J.
Es-Said, O. S.
TI Evaluation of the Effects of Powder Coating Cure Temperatures on the
Mechanical Properties of Aluminum Alloy Substrates
SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
LA English
DT Article
DE age hardenable aluminum alloys; degradation of mechanical properties;
low-temperature cure powder (LTCP); solvent-borne paints
AB The effects of curing temperature, based on new, low-temperature powder coating methods and traditional high-temperature powder coating methods, were studied. Heat-sensitive aluminum alloys (2024-T3, 6061-T6, and 7075-T6) were subjected to two different heat-treatment cycles, which were based on temperatures of 121 and 204 degrees C. Findings indicate that although both cure temperatures achieved powder coatings adhesion and thickness appropriate for industrial uses, the high-temperature cure treatment negatively affected the mechanical properties.
C1 [Maldonado, C.; Diaz, D.; Ranallo, J.; Painter, R.; Dahir, W.; Hassouna, D.; Gayer, B.; Toss, E.; Martinez, I.; Stoyanov, P.; Ogren, J.; Hilty, J.; Es-Said, O. S.] Loyola Marymount Univ, Dept Mech Engn, Los Angeles, CA 90045 USA.
[Lee, E. W.] USN, Air Warfare Ctr, Air Syst Command, Patuxent River, MD 20670 USA.
[Piatkowski, D.] USN, Air Warfare Ctr, Air Syst Command, Lakehurst, NJ 08733 USA.
RP Maldonado, C (reprint author), Loyola Marymount Univ, Dept Mech Engn, 1 LMU Dr, Los Angeles, CA 90045 USA.
EM oessaid@lmu.edu
NR 5
TC 3
Z9 4
U1 0
U2 7
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1059-9495
J9 J MATER ENG PERFORM
JI J. Mater. Eng. Perform.
PD FEB
PY 2009
VL 18
IS 1
BP 70
EP 78
DI 10.1007/s11665-008-9256-y
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA 403DS
UT WOS:000263063400012
ER
PT J
AU Tran, NE
Lambrakos, SG
Lagowski, JJ
AF Tran, Nick E.
Lambrakos, Samuel G.
Lagowski, Joseph J.
TI Analysis of Capacitance Characteristics of C-60, C-70, and La@C-82
SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
LA English
DT Article
DE advanced characterization; chemical analysis; energy
ID ELECTROCHEMICAL PROPERTIES; FULLERENES; KINETICS
AB Fullerenes and their derivatives are promising materials for supercapacitor devices due to their unique nanostructure that combines the reversible redox charge storage with the high surface area. In this article, the reversible redox charge storage of C-60, C-70, and La@C-82 in liquid ammonia solution is reported. An electrochemical analysis of these species using cyclic voltammetry is presented in conjunction with the theoretical interpretation. The relative magnitudes of transfer coefficients, which represent a measure of the symmetry of the energy barrier for oxidation and reduction of the monoanionic species of these fullerenes, suggest that the availability of the surface area permitting delocalization of pi electrons is a determining factor of their first reduction potential. The relationship between these transfer coefficients and fullerene geometry also support previous conclusions that the La atom is located within the fullerene cage of La@C-82. The electrochemical measurements analyzed were made using a modified three-compartment cell. Advantages associated with this modified cell for analysis of capacitance characteristics of C-60, C-70, and La@C-82 are discussed.
C1 [Tran, Nick E.] Washington Univ, Dept Chem, Washington, DC 20052 USA.
[Lambrakos, Samuel G.] USN, Res Lab, Mat Sci & Component Technol Directorate, Washington, DC 20375 USA.
[Lagowski, Joseph J.] Univ Texas Austin, Dept Chem & Biochem, Austin, TX 78712 USA.
RP Tran, NE (reprint author), Washington Univ, Dept Chem, Washington, DC 20052 USA.
EM nicketran@gmail.com
NR 20
TC 3
Z9 3
U1 0
U2 13
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1059-9495
J9 J MATER ENG PERFORM
JI J. Mater. Eng. Perform.
PD FEB
PY 2009
VL 18
IS 1
BP 95
EP 101
DI 10.1007/s11665-008-9267-8
PG 7
WC Materials Science, Multidisciplinary
SC Materials Science
GA 403DS
UT WOS:000263063400016
ER
PT J
AU Yim, SC
Lin, H
Robinson, DC
Tanizawa, K
AF Yim, Solomon C.
Lin, Huan
Robinson, David C.
Tanizawa, Katsuji
TI Predictive Capability of a 2D FNPF Fluid-Structure Interaction Model
SO JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING-TRANSACTIONS OF THE
ASME
LA English
DT Article
DE confined flow; flow simulation; waves
ID SURGE-HEAVE MOTIONS; MOORED SYSTEM; STOCHASTIC-ANALYSIS; CAPSIZE
AB The predictive capability of two-dimensional (2D) fully-nonlinear-potential-flow (FNPF) models of an experimental submerged moored sphere system subjected to waves is examined in this study. The experimental system considered includes both single-degree-of-freedom (SDOF) surge-only and two-degree-of-freedom (2DOF) surge-heave coupled motions, with main sources of nonlinearity from free surface boundary, large geometry, and coupled fluid-structure interaction. The FNPF models that track the nonlinear free-surface boundary exactly hence can accurately model highly nonlinear (nonbreaking) waves. To examine the predictive capability of the approximate 2D models and keep the computational effort manageable, the structural sphere is converted to an equivalent 2D cylinder. Fluid-structure interaction is coupled through an implicit boundary condition enforcing the instantaneous dynamic equilibrium between the fluid and the structure. The numerical models are first calibrated using free-vibration test results and then employed to investigate the wave-excited experimental responses via comparisons of time history and frequency response diagrams. Under monochromatic wave excitations, both SDOF and 2DOF models exhibit complex nonlinear experimental responses including coexistence, harmonics, subharmonics, and superharmonics. It is found that the numerical models can predict the general qualitative nonlinear behavior, harmonic and subharmonic responses as well as bifurcation structure. However, the predictive capability of the models deteriorates for superharmonic resonance possibly due to three-dimensional (3D) effects including diffraction and reflection. To accurately predict the nonlinear behavior of moored sphere motions in the highly sensitive response region, it is recommended that the more computationally intensive 3D numerical models be employed.
C1 [Yim, Solomon C.] Oregon State Univ, Dept Civil Engn, Corvallis, OR 97331 USA.
[Lin, Huan] Boeing Co, Tukwila, WA 98108 USA.
[Robinson, David C.] USN Acad, Annapolis, MD 21402 USA.
[Tanizawa, Katsuji] Natl Maritime Res Inst, Tokyo, Japan.
RP Yim, SC (reprint author), Oregon State Univ, Dept Civil Engn, Corvallis, OR 97331 USA.
FU US Office of Naval Research [N00014-04-1-0008, N00014-06-1-0326]
FX Financial support from the US Office of Naval Research (
N00014-04-1-0008 and N00014-06-1-0326) is gratefully acknowledged. The
writers would like to thank the reviewers for their valuable comments.
NR 19
TC 0
Z9 0
U1 0
U2 3
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0892-7219
J9 J OFFSHORE MECH ARCT
JI J. Offshore Mech. Arct. Eng. Trans. ASME
PD FEB
PY 2009
VL 131
IS 1
AR 011101
DI 10.1115/1.2948945
PG 9
WC Engineering, Ocean; Engineering, Mechanical
SC Engineering
GA 383VS
UT WOS:000261702900001
ER
PT J
AU Mendoza, WG
Zika, RG
Corredor, JE
Morrel, J
Ko, DS
Mooers, CNK
AF Mendoza, W. G.
Zika, R. G.
Corredor, J. E.
Morrel, J.
Ko, D-S
Mooers, C. N. K.
TI Developmental strategy for effective sampling to detect possible
nutrient fluxes in oligotrophic coastal reef waters in the Caribbean
SO JOURNAL OF OPERATIONAL OCEANOGRAPHY
LA English
DT Article
ID PRIMARY PRODUCTIVITY; CORAL-REEFS; SEA; OCEAN; DISCHARGE; SALINITY;
NITROGEN; LAGOON; COLUMN; SPACE
AB The stress contributed by nutrients to the coral reef ecosystem is among many problems that may be resolved using the coastal ocean observing system (COOS) being developed by various institutions. Traditional nutrient sampling has been inadequate to resolve issues on episodic nutrient fluxes in reef regions due to temporal and spatial variability. This paper illustrates sampling strategy using COOS information to identify areas that need critical investigation. The area investigated is within the Puerto Rico subdomain. Nutrient profile results from the region indicate nitrate is undetectable in the upper 50m due to high biological consumption. The strong vertical fluctuation in the upper 50m demonstrates a high anomaly in temperature and salinity and a strong cross correlation signal. High chlorophyll a concentration corresponding to seasonal high nutrient influx coincides with higher precipitation accumulation rates and apparent riverine input from the Amazon and Orinoco rivers, Non-detectability of nutrients in the upper 50m is a reflection of poor sampling frequency or the absence of a highly sensitive nutrient analysis method to capture episodic events. Thus, this paper explores the range of depths and concentrations that need to be critically investigated to determine nutrient fluxes, nutrient sources, and climatological factors that can affect nutrient delivery. It also provides insight into needed sampling rates and temporal and spatial domain choices, Finally, it demonstrates a scientific reconnaissance for a field study that is now possible with online in-situ and remote sensing observations and numerical simulations, as a consequence of IOOS in general and COOS in particular.
C1 [Mendoza, W. G.; Zika, R. G.] Univ Miami, Div Marine & Atmospher Chem, Rosenstiel Sch Marine & Atmospher Sci, Coral Gables, FL 33124 USA.
[Corredor, J. E.; Morrel, J.] Univ Puerto Rico, Dept Marine Sci, San Juan, PR 00936 USA.
[Ko, D-S] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Mooers, C. N. K.] Univ Miami, Div Appl Marine Phys, Rosenstiel Sch Marine & Atmospher Sci, Ocean Predict Expt Lab, Coral Gables, FL 33124 USA.
RP Mendoza, WG (reprint author), Univ Miami, Div Marine & Atmospher Chem, Rosenstiel Sch Marine & Atmospher Sci, Coral Gables, FL 33124 USA.
NR 40
TC 3
Z9 3
U1 4
U2 9
PU INST MARINE ENGINEERING, SCI & TECHNOL
PI LONDON
PA 80 COLEMAN ST, LONDON EC2R 5BJ, ENGLAND
SN 1755-876X
J9 J OPER OCEANOGR
JI J. Oper. Oceanogr.
PD FEB
PY 2009
VL 2
IS 1
BP 35
EP 47
PG 13
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 509KF
UT WOS:000271014300005
ER
PT J
AU Kerman, MC
Jiang, W
Blumberg, AF
Buttrey, SE
AF Kerman, M. C.
Jiang, W.
Blumberg, A. F.
Buttrey, S. E.
TI The application of a quantile regression metamodel for salinity event
detection confirmation within New York Harbour oceanographic data
SO JOURNAL OF OPERATIONAL OCEANOGRAPHY
LA English
DT Article
ID MODEL
AB This paper presents a continuation of research regarding the utilisation of robust metamodels for uncertainty quantification and event detection within a geophysical system. Using salinity data supplied by the New York Harbour Observing and Prediction System (NYHOPS) for two test datasets and three actual sensors, event detection results from a static threshold method are compared against those of a dynamic uncertainty quantification-based technique and a composite technique that combines both the static and dynamic methods. The results clearly show an appreciable reduction in the number of false positive detections when using the composite event detection method; in test data void of salinity events, false detection rates for low salinity conditions decreased by as much as 80%.
C1 [Kerman, M. C.] Lockheed Martin MS2, Moorestown, NJ USA.
[Jiang, W.] Sch Syst & Enterprises, Stevens Inst Technol, Hoboken, NJ USA.
[Blumberg, A. F.] Ctr Maritime Syst, Stevens Inst Technol, Hoboken, NJ USA.
[Buttrey, S. E.] USN, Postgrad Sch, Dept Operat Res, Monterey, CA USA.
RP Kerman, MC (reprint author), Lockheed Martin MS2, Moorestown, NJ USA.
NR 25
TC 1
Z9 1
U1 3
U2 9
PU INST MARINE ENGINEERING, SCI & TECHNOL
PI LONDON
PA 80 COLEMAN ST, LONDON EC2R 5BJ, ENGLAND
SN 1755-876X
J9 J OPER OCEANOGR
JI J. Oper. Oceanogr.
PD FEB
PY 2009
VL 2
IS 1
BP 49
EP 70
PG 22
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 509KF
UT WOS:000271014300006
ER
PT J
AU Harris, CM
Kim, D
Ghali, GE
AF Harris, Christopher M.
Kim, David
Ghali, Ghali E.
TI Nonpigmented Mycobacterial Skin Abscesses: A Rare Postoperative
Complication in a Cancer Patient
SO JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY
LA English
DT Article
ID RAPIDLY GROWING MYCOBACTERIA; SOFT-TISSUE; INFECTION; FORTUITUM;
CHELONAE; CLARITHROMYCIN; LIPOSUCTION; OUTBREAK; DISEASES
C1 [Harris, Christopher M.] USN, Med Ctr, Charette Hlth Care Ctr, Dept Oral & Maxillofacial Surg, Portsmouth, VA 23708 USA.
[Kim, David; Ghali, Ghali E.] Louisiana Hlth Sci Ctr, Shreveport, LA USA.
RP Harris, CM (reprint author), USN, Med Ctr, Charette Hlth Care Ctr, Dept Oral & Maxillofacial Surg, Portsmouth, VA 23708 USA.
EM harrisch71@gmail.com
NR 18
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 0278-2391
J9 J ORAL MAXIL SURG
JI J. Oral Maxillofac. Surg.
PD FEB
PY 2009
VL 67
IS 2
BP 416
EP 418
DI 10.1016/j.joms.2008.06.048
PG 3
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 401XD
UT WOS:000262975100027
PM 19138620
ER
PT J
AU Ghodadra, NS
Provencher, MT
Verma, NN
Wilk, KE
Romeo, AA
AF Ghodadra, Neil S.
Provencher, Matthew T.
Verma, Nikhil N.
Wilk, Kevin E.
Romeo, Anthony A.
TI Open, Mini-open, and All-Arthroscopic Rotator Cuff Repair Surgery:
Indications and Implications for Rehabilitation
SO JOURNAL OF ORTHOPAEDIC & SPORTS PHYSICAL THERAPY
LA English
DT Article
DE arthroscopy; rotator cuff tear; shoulder; supraspinatus
ID FULL-THICKNESS TEARS; CRUCIATE LIGAMENT RECONSTRUCTION; INTERFERENCE FIT
FIXATION; SUTURE-ANCHOR REPAIR; SURGICAL REPAIR; SINGLE-ROW; BONE
TUNNEL; LONG-TERM; IMPINGEMENT SYNDROME; OPERATIVE TREATMENT
AB Rotator cuff tears lead to debilitating shoulder dysfunction and impairment. The goal of rotator cuff repair is to eliminate pain and improve function with increased shoulder strength and range of motion. The clinical outcomes of the surgical methods of rotator cuff repair (open, mini-open, and all-arthroscopic cuff repair) vary, as each method provides an array of advantages and disadvantages. Although the open surgical technique has long been considered the gold standard of rotator cuff repair, surgeons are becoming more adept at decreasing patient morbidity through decreased surgical trauma from an all-arthroscopic approach. In addition to a surgery-specific rotator cuff rehabilitation program, effective communication, and coordination of care by the physical therapist and surgeon are essential in optimal patient education and outcomes. In the ideal situation, a very well-educated therapist who has great communication with the treating surgeon can mobilize the shoulder early, re-establish scapulothoracic function safely and minimize the risk of stiffness and retear, while facilitating return to function, Treatment options can be individualized according to patient age, size and chronicity of tear, Surgical approach, and fixation method. We recommend that patients who have undergone. an all-arthroscopic rotator cuff repair undergo an accelerated postoperative rehabilitation program. A rational approach to therapy involves early, safe motion to allow optimal tendon healing, yet maintenance of joint mobility with minimal stress. As the field of orthopedics and, particularly, rotator cuff repair continues to develop with new technologies, the patient, physical therapist, and doctor need to work together to ensure optimal outcomes and patient satisfaction.
LEVEL OF EVIDENCE: Therapy, Level 5. J Orthop Sports Phys Their 2009; 39(2):81-89. doi:10.2519/jospt.2009.2918
C1 [Ghodadra, Neil S.; Verma, Nikhil N.; Romeo, Anthony A.] Rush Univ, Dept Orthopaed Surg, Chicago, IL 60612 USA.
[Provencher, Matthew T.] USN, Med Ctr, Dept Orthopaed Surg, San Diego, CA 92152 USA.
[Wilk, Kevin E.] Champ Sports Med, Birmingham, AL USA.
[Wilk, Kevin E.] Tampa Bay Rays Baseball Team, Tampa Bay, FL USA.
RP Ghodadra, NS (reprint author), 1653 W Congress Pkwy,1471 Jelke Bldg, Chicago, IL 60612 USA.
EM neil_ghodadra@rush.edu
OI Romeo, Anthony/0000-0003-4848-3411
NR 77
TC 15
Z9 16
U1 0
U2 16
PU J O S P T,
PI ALEXANDRIA
PA 1111 NORTH FAIRFAX ST, STE 100, ALEXANDRIA, VA 22314-1436 USA
SN 0190-6011
J9 J ORTHOP SPORT PHYS
JI J. Orthop. Sports Phys. Ther.
PD FEB
PY 2009
VL 39
IS 2
BP 81
EP 89
DI 10.2519/jospt.2009.2918
PG 9
WC Orthopedics; Rehabilitation; Sport Sciences
SC Orthopedics; Rehabilitation; Sport Sciences
GA 406DW
UT WOS:000263276200005
PM 19194025
ER
PT J
AU Duplessis, C
Fothergill, D
AF Duplessis, Christopher
Fothergill, David
TI Exploiting Otoacoustic Emission Testing to Identify Clinical and
Subclinical Inner Ear Barotrauma in Divers: Potential Risk Factor for
Sensorineural Hearing Loss
SO JOURNAL OF OTOLARYNGOLOGY-HEAD & NECK SURGERY
LA English
DT Article
DE diving; inner ear barotrauma; sensorineural hearing loss; tinnitus;
transient-evoked otoacoustic emissions; tympanometry
ID ADULT-POPULATION; IMPULSE NOISE; PRESSURE
AB Introduction: Divers may sustain subclinical inner ear barotrauma (IEBT) that is not identified on pure-tone audiometry (PTA) but is potentially an important contributor to chronic sensorineural hearing loss (SNHL). Otoacoustic emission (OAE) testing, which identifies transient emission shifts (TESs) stemming from noise-induced inner ear injury, may be a more sensitive measure than PTA. Recognizing the salubrious health implications in mitigating the incidence and severity of SNHL in divers with earlier detection, we performed a pilot study investigating the potential of OAEs to identify clinical and subclinical IEBT (defined as a TES without an accompanying transient threshold shift) in divers subject to a provocative repetitive diving protocol.
Methods: Eight US Navy-trained male divers participated in a repetitive diving protocol encompassing up to a maximum of 10 weeks of diving. All subjects received an otoscopic examination, tympanometry, and OAE testing on both ears prior to and immediately after each dive. Audiometry was evaluated prior to and after each week of repetitive diving.
Results: There were 212 data pairs for comparison in the OAE testing. The average group wideband transient-evoked OAE shift was -1.24 dB. Only 25 significant threshold shifts were identified in over 1000 comparisons via audiometry.
Conclusions: OAE testing identified significant TES in a provocative repetitive diving protocol, supporting the assertion that both clinical and subclinical IEBT may contribute to chronic SNHL in divers. Exploiting this technology as an integral component of diving medical surveillance may identify those at risk for subsequent IEBT and hearing loss, facilitating opportunities for interventions to mitigate its severity or circumvent its development.
C1 [Duplessis, Christopher; Fothergill, David] USN, Submarine Med Res Lab, Groton, CT 06349 USA.
RP Duplessis, C (reprint author), USN, Submarine Med Res Lab, Box 900,Bldg 141, Groton, CT 06349 USA.
EM mduplessis4@cox.net
FU Biowarfare Initiatives Steering Committee
FX We thank Master Diver Rick Donlon for assistance with chamber support.
Funding was provided by the Biowarfare Initiatives Steering Committee.
NR 33
TC 6
Z9 6
U1 0
U2 4
PU B C DECKER INC
PI HAMILTON
PA 50 KING STREET EAST, 2ND FLOOR, PO BOX 620, L C D 1, HAMILTON, ONTARIO
L8N 3K7, CANADA
SN 1916-0216
J9 J OTOLARYNGOL-HEAD N
JI J. Otolaryngol-Head Neck Surg.
PD FEB
PY 2009
VL 38
IS 1
BP 67
EP 76
DI 10.2310/7070.2008.OA0211
PG 10
WC Otorhinolaryngology
SC Otorhinolaryngology
GA 544EA
UT WOS:000273634100011
PM 19344615
ER
PT J
AU Roberts, HW
Berzins, DW
Moore, BK
Charlton, DG
AF Roberts, Howard W.
Berzins, David W.
Moore, B. Keith
Charlton, David G.
TI Metal-Ceramic Alloys in Dentistry: A Review
SO JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY
LA English
DT Review
DE Alloys; composition; metal ceramic; review
AB Purpose: The purpose of this article is to review basic information about the alloys used for fabricating metal-ceramic restorations in dentistry. Their compositions, properties, advantages, and disadvantages are presented and compared. In addition to reviewing traditional noble-metal and base-metal metal-ceramic alloys, titanium and gold composite alloys are also discussed.
Materials and Methods: A broad search of the published literature was performed using Medline to identify pertinent current articles on metal-ceramic alloys as well as articles providing a historical background about the development of these alloys. Textbooks, the internet, and manufacturers' literature were also used to supplement this information.
Results: The review discusses traditional as well as more recently-developed alloys and technologies used in dentistry for fabricating metal-ceramic restorations. Clear advantages and disadvantages for these alloy types are provided and discussed as well as the role that compositional variations have on the alloys' performance. This information should enable clinicians and technicians to easily identify the important physical properties of each type and their primary clinical indications.
Conclusions: A number of alloys and metals are available for metal-ceramic use in dentistry. Each has its advantages and disadvantages, primarily based on its specific composition. Continuing research and development are resulting in the production of new technologies and products, giving clinicians even more choices in designing and fabricating metal-ceramic restorations.
C1 [Charlton, David G.] USN, Inst Dent & Biomed Res, Great Lakes, IL USA.
[Roberts, Howard W.] USAF Dent Evaluat & Consultat Serv Dent Biomat Ev, Great Lakes, IL USA.
[Berzins, David W.] Marquette Univ, Dept Dent Mat, Milwaukee, WI 53233 USA.
[Moore, B. Keith] Indiana Univ, Sch Dent, Dept Restorat Dent, Indianapolis, IN USA.
[Charlton, David G.] Gen Dynam Informat Technol, Frederick, MD USA.
RP Charlton, DG (reprint author), USN, Inst Dent & Biomed Res, 310A B St,Bldg 1-H, Great Lakes, IL USA.
EM david.charlton@med.navy.mil
NR 58
TC 40
Z9 43
U1 2
U2 19
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1059-941X
J9 J PROSTHODONT
JI J. Prosthodont.
PD FEB
PY 2009
VL 18
IS 2
BP 188
EP 194
DI 10.1111/j.1532-849X.2008.00377.x
PG 7
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA V17CB
UT WOS:000207914200019
PM 19178620
ER
PT J
AU Chen, F
Spano, A
Goodman, BE
Blasier, KR
Sabat, A
Jeffery, E
Norris, A
Shabanowitz, J
Hunt, DF
Lebedev, N
AF Chen, Frank
Spano, Anthony
Goodman, Benjamin E.
Blasier, Kiev R.
Sabat, Agnes
Jeffery, Erin
Norris, Andrew
Shabanowitz, Jeffrey
Hunt, Donald F.
Lebedev, Nikolai
TI Proteomic Analysis and Identification of the Structural and Regulatory
Proteins of the Rhodobacter capsulatus Gene Transfer Agent
SO JOURNAL OF PROTEOME RESEARCH
LA English
DT Article
DE Gene transfer agent; Rhodobacter capsulatus; proteome
ID COWPEA MOSAIC-VIRUS; RHODOPSEUDOMONAS-CAPSULATA; POLYACRYLAMIDE-GELS;
GOLD NANOPARTICLES; BUILDING-BLOCKS; BACTERIOPHAGE; PURIFICATION;
TRANSDUCTION; NANOSCALE; PARTICLES
AB The gene transfer agent of Rhodobacter capsulatus (GTA) is a unique phage-like particle that exchanges genetic information between members of this same species of bacterium. Besides being an excellent tool for genetic mapping, the GTA has a number of advantages for biotechnological and nanoenginearing purposes. To facilitate the GTA purification and identify the proteins involved in GTA expression, assembly and regulation, in the present work we construct and transform into R. capsulatus Y262 a gene coding for a C-terminally His-tagged capsid protein. The constructed protein was expressed in the cells, assembled into chimeric GTA particles inside the cells and excreted from the cells into surrounding medium. Transmission electron micrographs of phosphotungstate-stained, NiNTA-purified chimeric GTA confirm that its structure is similar to normal GTA particles, with many particles composed both of a head and a tail. The mass spectrometric proteomic analysis of polypeptides present in the GTA recovered outside the cells shows that GTA is composed of at least 9 proteins represented in the GTA gene cluster including proteins coded for by Orf's 3, 5, 6-9, 11, 13, and 15.
C1 [Spano, Anthony; Blasier, Kiev R.; Sabat, Agnes] Univ Virginia, Dept Biol, Charlottesville, VA 22904 USA.
[Chen, Frank] Virginia Commonwealth Univ, Dept Biochem & Mol Biol, Richmond, VA 23298 USA.
[Goodman, Benjamin E.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Jeffery, Erin; Norris, Andrew; Shabanowitz, Jeffrey; Hunt, Donald F.] Univ Virginia, Dept Chem, Charlottesville, VA 22904 USA.
[Hunt, Donald F.] Univ Virginia, Dept Pathol, Charlottesville, VA 22904 USA.
[Lebedev, Nikolai] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
RP Spano, A (reprint author), Univ Virginia, Dept Biol, Charlottesville, VA 22904 USA.
EM ajs6z@virginia.edu
RI Hunt, Donald/I-6936-2012
OI Hunt, Donald/0000-0003-2815-6368
FU Air Force Office of Scientific Research, Office of Naval Research
through a Naval Research Laboratory; NIH [GM 37537]
FX The support of this work by Air Force Office of Scientific Research,
Office of Naval Research through a Naval Research Laboratory base
program (N.L.), and NIH GM 37537 (D.F.H.) is gratefully acknowledged.
NR 35
TC 7
Z9 7
U1 0
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1535-3893
EI 1535-3907
J9 J PROTEOME RES
JI J. Proteome Res.
PD FEB
PY 2009
VL 8
IS 2
SI SI
BP 967
EP 973
DI 10.1021/pr8006045
PG 7
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 405AC
UT WOS:000263193300056
PM 19105630
ER
PT J
AU Roach, PB
Silverstein, JC
AF Roach, Paul Bryan
Silverstein, Jonathan C.
TI Training Fellows and Core Competency: "Making Quality Certain"
SO JOURNAL OF SURGICAL ONCOLOGY
LA English
DT Editorial Material
C1 [Roach, Paul Bryan] Naval Med Ctr Portsmouth, Portsmouth, VA USA.
[Silverstein, Jonathan C.] Univ Chicago, Dept Surg, Chicago, IL 60637 USA.
RP Roach, PB (reprint author), Dept Gen Surg, 620 John Paul Jones Circle, Portsmouth, VA 23708 USA.
EM paul.roach@med.navy.mil
NR 4
TC 2
Z9 2
U1 0
U2 0
PU WILEY-LISS
PI HOBOKEN
PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0022-4790
J9 J SURG ONCOL
JI J. Surg. Oncol.
PD FEB 1
PY 2009
VL 99
IS 2
BP 83
EP 84
DI 10.1002/jso.21185
PG 2
WC Oncology; Surgery
SC Oncology; Surgery
GA 402JC
UT WOS:000263009000001
PM 18985679
ER
PT J
AU Hughes, DR
Nuttall, AH
Katz, RA
Carter, GC
AF Hughes, Derke R.
Nuttall, Albert H.
Katz, Richard A.
Carter, G. Clifford
TI Nonlinear acoustics in cicada mating calls enhance sound propagation
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID PURE-TONE SONGS; CYCLOCHILA-AUSTRALASIAE; CYSTOSOMA-SAUNDERSII; BLADDER
CICADA; TIMBAL; MAGICICADA; FREQUENCY; RADIATION; GENUS; MODEL
AB An analysis of cicada mating calls, measured in field experiments, indicates that the very high levels of acoustic energy radiated by this relatively small insect are mainly attributed to the nonlinear characteristics of the signal. The cicada emits one of the loudest sounds in all of the insect population with a sound production system occupying a physical space typically less than 3 cc. The sounds made by tymbals are amplified by the hollow abdomen, functioning as a tuned resonator, but models of the signal based solely on linear techniques do not fully account for a sound radiation capability that is so disproportionate to the insect's size. The nonlinear behavior of the cicada signal is demonstrated by combining the mutual information and surrogate data techniques; the results obtained indicate decorrelation when the phase-randomized and non-phase-randomized data separate. The Volterra expansion technique is used to fit the nonlinearity in the insect's call. The second-order Volterra estimate provides further evidence that the cicada mating calls are dominated by nonlinear characteristics and also suggests that the medium contributes to the cicada's efficient sound propagation. Application of the same principles has the potential to improve radiated sound levels for sonar applications. [DOI: 10.1121/1.3050258]
C1 [Hughes, Derke R.; Nuttall, Albert H.; Katz, Richard A.; Carter, G. Clifford] USN, Undersea Warfare Ctr Div, Newport, RI 02841 USA.
RP Hughes, DR (reprint author), USN, Undersea Warfare Ctr Div, 1176 Howell St, Newport, RI 02841 USA.
EM derke.hughes@navy.mil
FU Office of Naval Research
FX This study was funded by the Office of Naval Research, program manager
Dr. Joel Davis. In addition, the Naval Undersea Warfare Center Division,
Newport, RI provided the lasers and the initial signal processing
analysis for the laser data. The authors are specifically grateful to
Dr. Paul Lefebvre, Dr. Pierre Corriveau, and Mr. Joseph Monti for their
support of the experiment. The authors are also grateful to Dr. John
Cooley for providing his knowledge of several species of cicada as well
as his expertise in producing mating calls, to Mr. Michael Neckermann
and Mr. Gerry Bunker for helping in the laser field experiment, and to
Dr. Lynn Antonelli for her technical consultations on effectively using
the dual-headed laser to record this historic data.
NR 37
TC 7
Z9 7
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 FEB
PY 2009
VL 125
IS 2
BP 958
EP 967
DI 10.1121/1.3050258
PG 10
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 417TE
UT WOS:000264100600041
PM 19206872
ER
PT J
AU Marshall, L
Miller, JAL
Heller, LM
Wolgemuth, KS
Hughes, LM
Smith, SD
Kopke, RD
AF Marshall, Lynne
Miller, Judi A. Lapsley
Heller, Laurie M.
Wolgemuth, Keith S.
Hughes, Linda M.
Smith, Shelley D.
Kopke, Richard D.
TI Detecting incipient inner-ear damage from impulse noise with otoacoustic
emissions
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID INDUCED HEARING-LOSS; SENSORY CELL LOSS; DISTORTION-PRODUCT;
FINE-STRUCTURE; THRESHOLD SHIFT; ACOUSTIC REFLEX; FREQUENCY; DPOAE;
EXPOSURE; RELIABILITY
AB Audiometric thresholds and otoacoustic emissions (OAEs) were measured in 285 U. S. Marine Corps recruits before and three weeks after exposure to impulse-noise sources from weapons' fire and simulated artillery, and in 32 non-noise-exposed controls. At pre-test, audiometric thresholds for all ears were <= 25 dB HL from 0.5 to 3 kHz and <= 30 dB HL at 4 kHz. Ears with low-level or absent OAEs at pre-test were more likely to be classified with significant threshold shifts (STSs) at post-test. A subgroup of 60 noise-exposed volunteers with complete data sets for both ears showed significant decreases in OAE amplitude but no change in audiometric thresholds. STSs and significant emission shifts (SESs) between 2 and 4 kHz in individual ears were identified using criteria based on the standard error of measurement from the control group. There was essentially no association between the occurrence of STS and SES. There were more SESs than STSs, and the group of SES ears had more STS ears than the group of no-SES ears. The increased sensitivity of OAEs in comparison to audiometric thresholds was shown in all analyses, and low-level OAEs indicate an increased risk of future hearing loss by as much as ninefold. (C) 2009 Acoustical Society of America. [DOI: 10.1121/1.3050304]
C1 [Marshall, Lynne; Miller, Judi A. Lapsley; Heller, Laurie M.; Hughes, Linda M.] USN, Submarine Med Res Lab, Groton, CT 06349 USA.
[Smith, Shelley D.] Univ Nebraska Med Ctr, Omaha, NE 68198 USA.
[Kopke, Richard D.] USN, San Diego Med Ctr, DOD Spatial Orientat, San Diego, CA 92134 USA.
RP Marshall, L (reprint author), USN, Submarine Med Res Lab, Groton, CT 06349 USA.
EM lynne.marshall@med.navy.mil
OI Lapsley Miller, Judi/0000-0002-6020-4254
FU Office of Naval Research
FX Thanks to Linda Westhusin, Michael McFadden, Denise Cline, Jackie Adler,
Joy Houston, and Brian Ferris for their assistance with data collection.
A special thanks to the staff and recruits of the Marine Corps Recruit
Depot (MCRD) San Diego and Charles Jackson of the Naval Medical Center
San Diego Occupational Audiology Department. Thanks to Tom Taggart for
his input into the overall experimental design, help with logistics, and
feedback on preliminary analyses. Thanks to Chris Shera for helpful
discussions on the theoretical aspects. Thanks to the two anonymous
reviewers whose considered opinions substantively improved the
manuscript. This research was supported primarily by grants from the
Office of Naval Research. The views expressed in this article are those
of the authors and do not reflect the official policy or position of the
Department of the Navy, the Department of Defense, or the United States
Government.
NR 83
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U1 6
U2 14
PU ACOUSTICAL SOC AMER AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0001-4966
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD FEB
PY 2009
VL 125
IS 2
BP 995
EP 1013
DI 10.1121/1.3050304
PG 19
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 417TE
UT WOS:000264100600044
PM 19206875
ER
PT J
AU Gates, JD
Carmichael, MG
Benavides, LC
Holmes, JP
Hueman, MT
Woll, MM
Ioannides, CG
Robson, CH
McLeod, DG
Ponniah, S
Peoples, GE
AF Gates, Jeremy D.
Carmichael, Mark G.
Benavides, Linda C.
Holmes, Jarrod P.
Hueman, Matthew T.
Woll, Michael M.
Ioannides, Constantine G.
Robson, Craig H.
McLeod, David G.
Ponniah, Sathibalan
Peoples, George E.
TI Longterm Followup Assessment of a HER2/neu Peptide (E75) Vaccine for
Prevention of Recurrence in High-Risk Prostate Cancer Patients
SO JOURNAL OF THE AMERICAN COLLEGE OF SURGEONS
LA English
DT Article
ID FOLATE-BINDING-PROTEIN; IN-SITU HYBRIDIZATION; PHASE-II TRIAL;
PROGNOSTIC-SIGNIFICANCE; RADICAL PROSTATECTOMY; ANTIGEN RECURRENCE;
METASTATIC BREAST; OVARIAN-CANCER; HER-2/NEU; IDENTIFICATION
AB BACKGROUND: E75 is an immunogenic peptide from the HER2/neu protein that is expressed in prostate cancer. High-risk prostate cancer (HRPC) patients demonstrating varying levels of HER2/neu expression were vaccinated with E75 peptide Plus granulocyte-macrophage colony-stimulating factor to prevent postprostatectomy PSA and clinical recurrences.
STUDY DESIGN: Forty evaluable HRPC patients were prospectively identified using the validated Center for Prostate Disease Research/CaPSURE high-risk equation and enrolled. HLA-A2(+) patients (n = 21) were vaccinated, and HLA-A2(-) patients (n = 19) were followed as clinical controls. All patients were assessed for clinicopathologic factors, biochemical recurrence (consecutive PSA value >= 0.2 ng/mL), clinical recurrence, and survival.
RESULTS: Comparing the vaccinated and control groups, there were no statistical differences in clinicopathologic prognostic factors. At a median followup of 58.2 months (range 18.8 to 62.7 months), PSA recurrence rates were not different between vaccinated (29%) and control (26%) groups. Median time to recurrence from operation was 14.0 months (range 5.7 to 53.4 months) versus 8.5 months (range 4.7 to 34.1 months) (p = 0.7), respectively. Three vaccinated patients had PSA recurrences during the vaccine series. If these patients were excluded, median time to recurrence for the vaccinated group extends to 42.7 months (range 20.4 to 53.4 months) (p = 0.4). Study-wide, only one clinical recurrence and death occurred in a vaccinated patient that was early in the vaccine series. Subset analysis comparing vaccinated recurrent patients with control recurrences noted some statistical trends.
CONCLUSIONS: The HER2/neu (E75) vaccine can prevent or delay recurrences in HRPC patients if completed before PSA recurrence. A larger randomized phase II trial in HLA-A2(+) patients will be required to confirm these findings. (J Am Coll Surg 2009;208:193-201. (C) 2009 by the American College of Surgeons)
C1 [Gates, Jeremy D.; Benavides, Linda C.; Peoples, George E.] Brooke Army Med Ctr, Gen Surg Serv, Dept Surg, Ft Sam Houston, TX 78234 USA.
[Carmichael, Mark G.; Hueman, Matthew T.; Woll, Michael M.; Ponniah, Sathibalan; Peoples, George E.] Uniformed Serv Univ Hlth Sci, Dept Surg, US Mil Canc Inst, Canc Vaccine Dev Program, Bethesda, MD 20814 USA.
[Carmichael, Mark G.] Walter Reed Army Med Ctr, Div Med, Hematol & Med Oncol Serv, Washington, DC 20307 USA.
[Holmes, Jarrod P.] USN, San Diego Med Ctr, Dept Hematol & Med Oncol, San Diego, CA 92152 USA.
[Ioannides, Constantine G.] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA.
[Robson, Craig H.] Univ Texas Hlth Sci Ctr San Antonio, Dept Urol, San Antonio, TX 78229 USA.
[McLeod, David G.] Walter Reed Army Med Ctr, Dept Urol, Ctr Prostate Dis Res, Washington, DC 20307 USA.
RP Peoples, GE (reprint author), Brooke Army Med Ctr, Gen Surg Serv, Dept Surg, 3851 Roger Brooke Dr, Ft Sam Houston, TX 78234 USA.
EM george.peoples@amedd.army.mil
FU Center for Prostate Disease Research; Henry M Jackson Foundation for the
Advancement of Military Medicine
FX Supported by grants from the Center for Prostate Disease Research, a
Congressionally funded program of the Henry M Jackson Foundation for the
Advancement of Military Medicine.
NR 38
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U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1072-7515
J9 J AM COLL SURGEONS
JI J. Am. Coll. Surg.
PD FEB
PY 2009
VL 208
IS 2
BP 193
EP 201
DI 10.1016/j.jamcollsurg.2008.10.018
PG 9
WC Surgery
SC Surgery
GA 407TP
UT WOS:000263387500004
PM 19228530
ER
PT J
AU Simecek, JW
Diefenderfer, KE
Cohen, ME
AF Simecek, John W.
Diefenderfer, Kim E.
Cohen, Mark E.
TI An evaluation of replacement rates for posterior resin-based composite
and amalgam restorations in US Navy and Marine Corps recruits
SO JOURNAL OF THE AMERICAN DENTAL ASSOCIATION
LA English
DT Article
DE Amalgam; resin-based composite; posterior restorations
ID GENERAL DENTAL PRACTICE; PERMANENT TEETH; LONGEVITY; AGE; EMERGENCIES;
PERSONNEL; REASONS; CARIES; 5-YEAR; TRIAL
AB Background. Restoration replacement is a clinical concern that has not been studied among military personnel. The authors determined the prevalence of placement of posterior amalgam and resin-based composite restorations and the incidence of replacement among U.S. Navy and Marine Corps personnel.
Methods. The authors analyzed dental records from 2,780 personnel to determine the relative risk of replacement for initially sound restorations during subjects' first years of military service.
Results. At the initial examination, 964 (15.2 percent) of amalgam restorations and 199 (17.4 percent) of resin-based composite restorations required re-treatment. Of those judged clinically acceptable, 14.2 percent of amalgam and 16.7 percent of resin-based composite restorations required replacement during the observation period. The authors found significant increases in replacement rates for resin-based composite restorations compared with amalgam restorations for replacement due to all causes (adjusted hazard ratio, 1.28; P <.05), as well as for replacement due to restoration failure (adjusted hazard ratio, 1.64; P <.01).
Conclusions. About 30 percent of posterior restorations required replacement, either at the initial examination or during the subjects' first years of military service. In a young military population, significantly more resin-based composite restorations in place at the initial examination will require replacement than will amalgam restorations. Multi-surface restorations had higher rates of replacement than did one-surface restorations, and subjects at high caries risk experienced significantly higher replacement rates than did those at low caries risk.
Clinical Implications. The number of surfaces restored and subjects' caries risk status may influence the longevity of resin-based composite and amalgam restorations.
C1 [Simecek, John W.; Cohen, Mark E.] USN, Inst Dent & Biomed Res, Great Lakes, IL 60088 USA.
[Diefenderfer, Kim E.] USN, Hlth Clin, Fisher Healthcare Clin, Great Lakes, IL USA.
RP Simecek, JW (reprint author), USN, Inst Dent & Biomed Res, 310 AB St, Great Lakes, IL 60088 USA.
EM john.simecek@med.navy.mil
NR 33
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U1 1
U2 8
PU AMER DENTAL ASSOC
PI CHICAGO
PA 211 E CHICAGO AVE, CHICAGO, IL 60611 USA
SN 0002-8177
J9 J AM DENT ASSOC
JI J. Am. Dent. Assoc.
PD FEB
PY 2009
VL 140
IS 2
BP 200
EP 209
PG 10
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 406EL
UT WOS:000263277700023
PM 19188417
ER
PT J
AU Broutman, D
Eckermann, SD
Rottman, JW
AF Broutman, Dave
Eckermann, Stephen D.
Rottman, James W.
TI Practical Application of Two-Turning-Point Theory to Mountain-Wave
Transmission through a Wind Jet
SO JOURNAL OF THE ATMOSPHERIC SCIENCES
LA English
DT Article
ID TRAPPED LEE WAVES; SHEAR; APPROXIMATIONS; STRATOSPHERE; DRAG
AB A Fourier method is used to model mountain waves that have nearby turning points in a wind jet. In Fourier space, the propagation equations are solved by ray theory. To correct for the ray singularity at a turning point without time-consuming special-function evaluations, the ray solution is linearly interpolated across the breakdown region. The Fourier solutions for the spatial wavefield are compared with mesoscale model simulations in two cases: two-dimensional flow over idealized topography with uniform stratification and a sech-squared wind profile and three-dimensional flow over the island of Jan Mayen with stratification and wind profiles taken from radiosonde measurements. The latter case reveals the partial transmission of trapped mountain waves into the stratosphere.
C1 [Eckermann, Stephen D.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Broutman, Dave] Computational Phys Inc, Springfield, VA USA.
[Rottman, James W.] Sci Applicat Int Corp, Naval Hydrodynam Div, San Diego, CA 92121 USA.
RP Eckermann, SD (reprint author), USN, Res Lab, Div Space Sci, Code 7646, Washington, DC 20375 USA.
EM stephen.eckermann@nrl.navy.mil
FU U.S. Office of Naval Research [N00014-06-C-0362]; National Science
Foundation [ATM-0448888]; Office of Naval Research 6.1 program; NASA's
Modeling, Analysis and Prediction program, Grant [NNG06HM19I]
FX We thank the reviewers for comments, and John Lindeman and Jun Ma for
providing WRF simulations during the development of this model. The
research was supported in part by the U.S. Office of Naval Research
under Contract N00014-06-C-0362. Funding for DB was also provided by the
National Science Foundation under Grant ATM-0448888. Funding for SDE was
provided by the Office of Naval Research 6.1 program and by NASA's
Modeling, Analysis and Prediction program, Grant NNG06HM19I.
NR 25
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Z9 10
U1 0
U2 1
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 FEB
PY 2009
VL 66
IS 2
BP 481
EP 494
DI 10.1175/2008JAS2786.1
PG 14
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 415LZ
UT WOS:000263936600015
ER
PT J
AU Coy, L
Eckermann, S
Hoppel, K
AF Coy, Lawrence
Eckermann, Stephen
Hoppel, Karl
TI Planetary Wave Breaking and Tropospheric Forcing as Seen in the
Stratospheric Sudden Warming of 2006
SO JOURNAL OF THE ATMOSPHERIC SCIENCES
LA English
DT Article
ID MODEL; DISTURBANCES; SIMULATIONS; DYNAMICS; OZONE; UK
AB The major stratospheric sudden warming (SSW) of January 2006 is examined using meteorological fields from Goddard Earth Observing System version 4 (GEOS-4) analyses and forecast fields from the Navy Operational Global Atmospheric Prediction System-Advanced Level Physics, High Altitude (NOGAPSALPHA). The study focuses on the upper tropospheric forcing that led to the major SSW and the vertical structure of the subtropic wave breaking near 10 hPa that moved low tropical values of potential vorticity (PV) to the pole. Results show that an eastward-propagating upper tropospheric ridge over the North Atlantic with its associated cold temperature perturbations (as manifested by high 360-K potential temperature surface perturbations) and large positive local values of meridional heat flux directly forced a change in the stratospheric polar vortex, leading to the stratospheric subtropical wave breaking and warming. Results also show that the anticyclonic development, initiated by the subtropical wave breaking and associated with the poleward advection of the low PV values, occurred over a limited altitude range of approximately 6-10 km. The authors also show that the poleward advection of this localized low-PV anomaly was associated with changes in the Eliassen-Palm (EP) flux from equatorward to poleward, suggesting an important role for Rossby wave reflection in the SSW of January 2006. Similar upper tropospheric forcing and subtropical wave breaking were found to occur prior to the major SSW of January 2003.
C1 [Coy, Lawrence] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Coy, L (reprint author), USN, Res Lab, Div Space Sci, Code 7646,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM coy@nrl.navy.mil
FU Office of Naval Research; NASA MAP program
FX This research was supported by the Office of Naval Research and the NASA
MAP program. We thank David Siskind, John McCormack, and Steven Pawson
for their research insights and manuscript comments.
NR 28
TC 35
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U1 1
U2 6
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0022-4928
J9 J ATMOS SCI
JI J. Atmos. Sci.
PD FEB
PY 2009
VL 66
IS 2
BP 495
EP 507
DI 10.1175/2008JAS2784.1
PG 13
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 415LZ
UT WOS:000263936600016
ER
PT J
AU Freilich, D
Pearce, LB
Pitman, A
Greenburg, G
Berzins, M
Bebris, L
Ahlers, S
McCarron, R
AF Freilich, Daniel
Pearce, L. Bruce
Pitman, Arkadiy
Greenburg, Gerson
Berzins, Mara
Bebris, Lolita
Ahlers, Steven
McCarron, Richard
TI HBOC-201 Vasoactivity in a Phase III Clinical Trial in Orthopedic
Surgery Subjects-Extrapolation of Potential Risk for Acute Trauma Trials
SO JOURNAL OF TRAUMA-INJURY INFECTION AND CRITICAL CARE
LA English
DT Article
DE Hemoglobin-based oxygen carrier; HBOC-201; Blood substitute; Blood
pressure; Vasoactivity; Adverse events; Clinical trial; Serious adverse
events; Cardiac biomarkers; Troponin; Trauma; Hemorrhagic shock.
ID CARDIAC TROPONIN-I; ACUTE CORONARY SYNDROMES; PERIOPERATIVE
MYOCARDIAL-INFARCTION; POLYMERIZED HEMOGLOBIN HBOC-201; CRITICALLY-ILL
PATIENTS; INTENSIVE-CARE-UNIT; HEMORRHAGIC-SHOCK; BRAIN-INJURY; OXYGEN
CARRIER; CREATINE-KINASE
AB Background: Vasoactivity has hampered progress of hemoglobin-based oxygen carriers (HBOCs) due to concern for adverse blood pressure responses and secondary complications. A recent formulation, highly polymerized HBOC-201 (Biopure, Cambridge, MA), has been found to be less vasoactive than prior less polymerized formulations, and to improve outcome in animal models of hemorrhagic shock (HS) compared with standard resuscitation fluids. HBOCs are envisioned to have life-saving potential for severe trauma patients for whom death due to HS is common despite transport to level I trauma centers. As part of a benefit:risk analysis for a proposed clinical trial of HBOC-201 in patients with traumatic HS, we analyzed data from a previoms phase III clinical trial of this HBOC that involved orthopedic surgery patients, for vasoactivity and related effects, with focus on patients more representative of the trauma population.
Study Design: In a previous phase III study involving orthopedic surgery patients, HEM-0115, consented/stabilized patients were randomized to receive HBOC-201 (N = 350) (up to ten 30 g Hb units) or red blood cells (RBC) (N = 338) (up to 9 units) at the first transfusion decision. Systolic blood pressure (SBP) responses, key system and individual adverse events (AEs) and serious adverse events, and cardiac biomarker elevation incidences, were compared in the overall population and subpopulations: with stable trauma, hypotension, and with age stratification (Student's t and Fisher's exact tests, significance p < 0.05).
Results: Mild to moderate peak SBP responses were common in HBOC-201 subjects and more common than with RBC in the overall population (mean, 60.8 years old), but less frequent in HBOC-201 subjects with stable trauma, younger age (<50 years old), and hypotension, in whom group differences were narrowed. SBP A responses were more common with HBOC-201 than RBC in the overall population, but not in subjects with stable trauma and <50 year olds, in whom response rates were lower. In the overall population, AEs were more common than with RBC in most systems (also, hypertension and stroke); only cardiac system serious adverse events were more common with HBOC-201. In contrast, there were few significant group differences in stable trauma, hypotensive, and <70 and especially <50-year-old subjects, in whom AE incidences were generally lower. A disproportionate number of key AEs occurred in elderly subjects. Troponin (but not CK-MB) elevation was; more frequent with HBOC-201 than RBC in the overall population but not in <50 year olds, and was not associated with acute coronary syndrome (ACS) or death.
Conclusion: Our limited HEM-0115 safety analysis shows that key potentially vasoactivity- related adverse safety signals were more frequent with HBOC-201 than RBC in older patients undergoing orthopedic surgery with rapid access to safe blood transfusions. That incidences of these safety signals were generally lower and group differences narrowed in subpopulations with stable trauma, hypotension, and younger age, suggests an acceptable safety profile in younger acute trauma populations, especially in settings where rapid access to safe blood transfusions is unavailable; confirmation in controlled clinical trials is urgently warranted.
C1 [Freilich, Daniel; Pearce, L. Bruce; Pitman, Arkadiy; Greenburg, Gerson; Berzins, Mara; Bebris, Lolita; Ahlers, Steven; McCarron, Richard] USN, Med Res Ctr, Hematomimet Program, Trauma & Resuscitat Med Dept, Silver Spring, MD USA.
RP Freilich, D (reprint author), 503 Robert Grant Ave, Silver Spring, MD 20910 USA.
EM daniel.freilich@med.navy.mil
FU Biopure Corporation; the U.S. Government [A0315]; Naval Medical Research
Center (NMRC) and Biopure Corp; Greenbung, were employees of Biopure
Corp.
FX The HEM-0115 trial was funded and conducted by Biopure Corporation.
Salary support for the safety analyses described herein was entirely
funded by the U.S. Government (Office of Naval Research Work Unit Number
A0315). Naval Medical Research Center (NMRC) and Biopure Corp. have a
Cooperative Research and Development Agreement for evaluation of
HBOC-201 in trauma clinical trials. No NMRC authors have Financial or
other competing interests related to this article. There were no
transfers, of funds in any of these agreements. L.B. Pearce, A. Pitman,
and G. Greenbung, were employees of Biopure Corp. and may have Financial
interest in the subject material, HBOC-201. Their contribution to this
manuscript was limited to provision of data tables and editorial review.
NR 43
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Z9 24
U1 1
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0022-5282
J9 J TRAUMA
JI J. Trauma-Injury Infect. Crit. Care
PD FEB
PY 2009
VL 66
IS 2
BP 365
EP 376
DI 10.1097/TA.0b013e3181820d5c
PG 12
WC Critical Care Medicine; Surgery
SC General & Internal Medicine; Surgery
GA 408NX
UT WOS:000263442800011
PM 19204509
ER
PT J
AU Crane, NJ
McHone, B
Hawksworth, J
Pearl, JP
Denobile, J
Tadaki, D
Pinto, PA
Levin, IW
Elster, EA
AF Crane, N. J.
McHone, B.
Hawksworth, J.
Pearl, J. P.
Denobile, J.
Tadaki, D.
Pinto, P. A.
Levin, I. W.
Elster, E. A.
TI Enhanced Surgical Imaging: Laparoscopic Vessel Identification and
Assessment of Tissue Oxygenation
SO JOURNAL OF UROLOGY
LA English
DT Article
C1 [Crane, N. J.; McHone, B.; Hawksworth, J.; Pearl, J. P.; Denobile, J.; Tadaki, D.; Pinto, P. A.; Levin, I. W.; Elster, E. A.] USN, Med Res Ctr, Silver Spring, MD USA.
RP Crane, NJ (reprint author), USN, Med Res Ctr, Silver Spring, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
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 FEB
PY 2009
VL 181
IS 2
BP 730
EP 730
PG 1
WC Urology & Nephrology
SC Urology & Nephrology
GA 394BJ
UT WOS:000262419900144
ER
PT J
AU Booth-Kewley, S
Larson, GE
Highfill-McRoy, RM
AF Booth-Kewley, Stephanie
Larson, Gerald E.
Highfill-McRoy, Robyn M.
TI Psychosocial Predictors of Return to Duty Among Marine Recruits With
Musculoskeletal Injuries
SO MILITARY MEDICINE
LA English
DT Article
ID LOW-BACK-PAIN; ORGANIZATIONAL COMMITMENT; WORK; MILITARY;
REHABILITATION; CONSEQUENCES; EXPECTATIONS; RECOVERY; HEALTH; ARMY
AB Psychosocial factors may have an important impact on injury recovery and return to work. To explore the influence of psychosocial factors in a cohort of injured military personnel, data were collected from 166 Marine Corps basic training recruits with musculoskeletal injuries. This sample was followed prospectively to determine whether they graduated from basic training or were discharged from the Marines. Demographic, injury-related, and psychosocial factors were analyzed to determine predictors of failure to graduate from basic training. The strongest risk factors for failing to graduate were not expecting to graduate, low or uncertain career intentions, lack of determination, psychological distress, and low organizational commitment. In the final multivariate logistics model, two predictors of failure to graduate emerged: not expecting to graduate and low or uncertain career intentions. The results suggest that interventions to reduce attrition in injured military populations should be designed to counter pessimistic expectations and emphasize career opportunities.
C1 [Booth-Kewley, Stephanie; Larson, Gerald E.; Highfill-McRoy, Robyn M.] Naval Hlth Res Ctr, San Diego, CA 92106 USA.
[Highfill-McRoy, Robyn M.] Sci Applicat Int Corp Inc, San Diego, CA 92121 USA.
RP Booth-Kewley, S (reprint author), Naval Hlth Res Ctr, 140 Sylvester Rd, San Diego, CA 92106 USA.
FU U.S. Army Medical Research and Materiel Command, Fort Detrick, MD
[60533]
FX This research was supported by U.S. Army Medical Research and Materiel
Command, Fort Detrick, MD, under Work Unit No. 60533. The views
expressed in this article are those of the authors and do not
necessarily reflect the official policy or position of the Department of
the Navy, Department of Defense, or the U.S. Government. This research
has been conducted in compliance with all applicable federal regulations
governing the protection of human subjects in research (NHRC.2005.0013).
NR 33
TC 7
Z9 7
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 FEB
PY 2009
VL 174
IS 2
BP 139
EP 152
PG 14
WC Medicine, General & Internal
SC General & Internal Medicine
GA 601LO
UT WOS:000278061200008
PM 19317194
ER
PT J
AU Berti, L
D'Agostino, PS
Boeneman, K
Medintz, IL
AF Berti, Lorenzo
D'Agostino, Paola Serena
Boeneman, Kelly
Medintz, Igor L.
TI Improved Peptidyl Linkers for Self-Assembly of Semiconductor Quantum Dot
Bioconjugates
SO NANO RESEARCH
LA English
DT Article
DE Semiconductor quantum dot; peptide; DNA; nanocrystal; bioconjugation;
iodoacetyl; sulfhydryl; polyhistidine; metal-affinity; fluorescence;
fluorescence resonance energy transfer (FRET)
ID RESONANCE ENERGY-TRANSFER; PROTEIN; FLUOROPHORES; STABILITY; LIGANDS;
DONORS
AB We demonstrate improved peptide linkers which allow both conjugation to biomolecules such as DNA and self-assembly with luminescent semiconductor quantum dots. A hexahistidine peptidyl sequence was generated by standard solid phase peptide synthesis and modified with the succinimidyl ester of iodoacetamide to yield a thiol-reactive iodoacetyl polyhistidine linker. The reactive peptide was conjugated to dye-labeled thiolated DNA which was utilized as a model target biomolecule. Agarose gel electrophoresis and fluorescence resonance energy transfer analysis confirmed that the linker allowed the DNA to self-assemble with quantum dots via metal-affinity driven coordination. In contrast to previous peptidyl linkers that were based on disulfide exchange and were thus labile to reduction, the reactive haloacetyl chemistry demonstrated here results in a more stable thioether bond linking the DNA to the peptide which can withstand strongly reducing environments such as the intracellular cytoplasm. As thiol groups occur naturally in proteins, can be engineered into cloned proteins, inserted into nascent peptides or added to DNA during synthesis, the chemistry demonstrated here can provide a simple method for self-assembling a variety of stable quantum dot bioconjugates.
C1 [Boeneman, Kelly; Medintz, Igor L.] USN, Ctr Bio Mol Sci & Engn Code 6900, Res Lab, Washington, DC 20375 USA.
[Berti, Lorenzo; D'Agostino, Paola Serena] CNR, INFM, Natl Res Ctr NanoStruct & BioSyst Surfaces S3, I-41100 Modena, Italy.
[Berti, Lorenzo] Univ Calif Davis, Med Ctr, Sacramento, CA 95817 USA.
RP Medintz, IL (reprint author), USN, Ctr Bio Mol Sci & Engn Code 6900, Res Lab, Washington, DC 20375 USA.
EM igor.medintz@nrl.navy.mil
RI Gemmill, Kelly/G-2167-2012
FU DTRA; ONR; NRL; NRL-NSI; ASEE through NRL
FX The authors acknowledge Stephen Lee and Ilya Elashvilli of the CB
Directorate/Physical S&T Division (DTRA), ONR, NRL, and the NRL-NSI for
financial support. K. B. acknowledges an ASEE fellowship through NRL.
The authors also gratefully acknowledge Dr. Hedi Mattoussi, NRL, for
providing the luminescent quantum dots utilized in this study.
NR 32
TC 30
Z9 30
U1 1
U2 39
PU TSINGHUA UNIV PRESS
PI BEIJING
PA TSINGHUA UNIV, RM A703, XUEYAN BLDG, BEIJING, 10084, PEOPLES R CHINA
SN 1998-0124
EI 1998-0000
J9 NANO RES
JI Nano Res.
PD FEB
PY 2009
VL 2
IS 2
BP 121
EP 129
DI 10.1007/s12274-009-9008-9
PG 9
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Applied
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 548DE
UT WOS:000273939000002
ER
PT J
AU Mazin, II
Johannes, MD
AF Mazin, I. I.
Johannes, M. D.
TI A key role for unusual spin dynamics in ferropnictides
SO NATURE PHYSICS
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; GAPS
AB The discovery of high-T(c) ferropnictides introduced a new family of superconductors, and has already revealed a complicated and often contradictory picture of the structural and magnetic properties. An almost unprecedented sensitivity of the calculated magnetism and Fermi surface to structural details prevents correspondence to experiment. Experimental probes of the order parameter are in surprisingly strong disagreement, even considering the relative immaturity of the field. We outline various and seemingly contradictory evidence, both theoretical and experimental, and show it can be rectified by assuming a large-moment spin density wave, well defined but with magnetic twin and antiphase boundaries, dynamic on the experimental timescale. Under this assumption, calculations can accurately reproduce even very fine details of the structure, and a natural explanation for the temperature separation of structural and magnetic transitions is provided. Thus, our theory restores agreement between experiment and theory in crucial areas, making further cooperative progress possible on both fronts.
C1 [Mazin, I. I.; Johannes, M. D.] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RP Johannes, MD (reprint author), USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
EM johannes@dave.nrl.navy.mil
RI Mazin, Igor/B-6576-2008
NR 41
TC 202
Z9 202
U1 4
U2 24
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1745-2473
J9 NAT PHYS
JI Nat. Phys.
PD FEB
PY 2009
VL 5
IS 2
BP 141
EP 145
DI 10.1038/NPHYS1160
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 408TS
UT WOS:000263458500019
ER
PT J
AU Kourafalou, VH
Peng, G
Kang, H
Hogan, PJ
Smedstad, OM
Weisberg, RH
AF Kourafalou, Vassiliki H.
Peng, Ge
Kang, HeeSook
Hogan, Patrick J.
Smedstad, Ole-Martin
Weisberg, Robert H.
TI Evaluation of Global Ocean Data Assimilation Experiment products on
South Florida nested simulations with the Hybrid Coordinate Ocean Model
SO OCEAN DYNAMICS
LA English
DT Article
CT Conference on Global Ocean Data Assimilation Experiment Products in
Coastal and Shelf Seas
CY OCT 10-11, 2007
CL Liverpool, ENGLAND
DE Numerical modeling; Coastal dynamics; Loop Current; Florida Current;
Data assimilation
ID VERTICAL DIFFUSIVITIES; CONTINENTAL-SHELF; FORECAST MODEL; SYSTEM;
HYCOM; VARIABILITY; SENSITIVITY; TURBULENCE; INTRUSION; MOMENTUM
AB The South Florida Hybrid Coordinate Ocean Model (SoFLA-HYCOM) encompasses a variety of coastal regions (the broad Southwest Florida shelf, the narrow Atlantic Keys shelf, the shallow Florida Bay, and Biscayne Bay) and deep regions (the Straits of Florida), including Marine Protected Areas (the Florida Keys Marine Sanctuary and the Dry Tortugas Ecological Reserve). The presence of the strong Loop Current/Florida Current system and associated eddies connects the local and basin-wide dynamics. A multi-nested approach has been developed to ensure resolution of coastal-scale processes and proper interaction with the large scale flows. The simulations are free running and effects of data assimilation are introduced through boundary conditions derived from Global Ocean Data Assimilation Experiment products. The study evaluates the effects of boundary conditions on the successful hindcasting of circulation patterns by a nested model, applied on a dynamically and topographically complex shelf area. Independent (not assimilated) observations are employed for a quantitative validation of the numerical results. The discussion of the prevailing dynamics that are revealed in both modeled and observed patterns suggests the importance of topography resolution and local forcing on the inner shelf to middle shelf areas, while large scale processes are found to dominate the outer shelf flows. The results indicate that the successful hindcasting of circulation patterns in a coastal area that is characterized by complex topography and proximity to a large scale current system requires a dynamical downscaling approach, with simulations that are nested in a hierarchy of data assimilative outer models.
C1 [Kourafalou, Vassiliki H.; Peng, Ge; Kang, HeeSook] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33152 USA.
[Hogan, Patrick J.] Stennis Space Ctr, Naval Res Lab, Hancock Cty, MS USA.
[Smedstad, Ole-Martin] Stennis Space Ctr, Technol Solut Grp PSI, Hancock Cty, MS USA.
[Weisberg, Robert H.] Univ S Florida, Coll Marine Sci, St Petersburg, FL 33701 USA.
RP Kourafalou, VH (reprint author), Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33152 USA.
EM vkourafalou@rsmas.miami.edu
RI Peng, Ge/B-6080-2011; Peng, Ge /D-8003-2014
OI Peng, Ge /0000-0002-1986-9115
NR 40
TC 31
Z9 31
U1 0
U2 5
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 1616-7341
J9 OCEAN DYNAM
JI Ocean Dyn.
PD FEB
PY 2009
VL 59
IS 1
BP 47
EP 66
DI 10.1007/s10236-008-0160-7
PG 20
WC Oceanography
SC Oceanography
GA 402BN
UT WOS:000262989300004
ER
PT J
AU Halliwell, GR
Barth, A
Weisberg, RH
Hogan, P
Smedstad, OM
Cummings, J
AF Halliwell, George R., Jr.
Barth, Alexander
Weisberg, Robert H.
Hogan, Patrick
Smedstad, Ole Martin
Cummings, James
TI Impact of GODAE products on nested HYCOM simulations of the West Florida
Shelf
SO OCEAN DYNAMICS
LA English
DT Article; Proceedings Paper
CT Conference on Global Ocean Data Assimilation Experiment Products in
Coastal and Shelf Seas
CY OCT 10-11, 2007
CL Liverpool, ENGLAND
DE Numerical modeling; Coastal circulation
ID COORDINATE OCEAN MODEL; VERTICAL COORDINATE; CONTINENTAL-SHELF; DATA
ASSIMILATION; NORTH-ATLANTIC; PRESSURE; CIRCULATION; INTRUSION;
INITIALIZATION; EQUATIONS
AB Nested non-assimilative simulations of the West Florida Shelf for 2004-2005 are used to quantify the impact of initial and boundary conditions provided by Global Ocean Data Assimilation Experiment ocean products. Simulations are nested within an optimum interpolation hindcast of the Atlantic Ocean, the initial test of the US Navy Coupled Ocean Data Assimilation system for the Gulf of Mexico, and a global ocean hindcast that used the latter assimilation system. These simulations are compared to one that is nested in a non-assimilative Gulf of Mexico model to document the importance of assimilation in the outer model. Simulations are evaluated by comparing model results to moored Acoustic Doppler Current Profiler measurements and moored sea surface temperature time series. The choice of outer model has little influence on simulated velocity fluctuations over the inner and middle shelf where fluctuations are dominated by the deterministic wind-driven response. Improvement is documented in the representation of alongshore flow variability over the outer shelf, driven in part by the intrusion of the Loop Current and associated cyclones at the shelf edge near the Dry Tortugas. This improvement was realized in the simulation nested in the global ocean hindcast, the only outer model choice that contained a realistic representation of Loop Current transport associated with basin-scale wind-driven gyre circulation and the Atlantic Meridional Overturning Circulation. For temperature, the non-assimilative outer model had a cold bias in the upper ocean that was substantially corrected in the data-assimilative outer models, leading to improved temperature representation in the simulations nested in the assimilative outer models.
C1 [Halliwell, George R., Jr.] Univ Miami, MPO RSMAS, Miami, FL 33152 USA.
[Barth, Alexander] Univ Liege, GHER AGO, Liege, Belgium.
[Weisberg, Robert H.] Univ S Florida, St Petersburg, FL 33701 USA.
[Hogan, Patrick] Stennis Space Ctr, Naval Res Lab, Stennis Space Ctr, MS USA.
[Smedstad, Ole Martin] Stennis Space Ctr, Technol Solut Grp, PSI, Stennis Space Ctr, MS USA.
[Cummings, James] Naval Res Lab, Monterey, CA USA.
RP Halliwell, GR (reprint author), Univ Miami, MPO RSMAS, 4600 Rickenbacker Causeway, Miami, FL 33152 USA.
EM ghalliwell@rsmas.miami.edu
RI Halliwell, George/B-3046-2011
OI Halliwell, George/0000-0003-4216-070X
NR 46
TC 24
Z9 24
U1 0
U2 4
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 1616-7341
EI 1616-7228
J9 OCEAN DYNAM
JI Ocean Dyn.
PD FEB
PY 2009
VL 59
IS 1
BP 139
EP 155
DI 10.1007/s10236-008-0173-2
PG 17
WC Oceanography
SC Oceanography
GA 402BN
UT WOS:000262989300009
ER
PT J
AU Devlin, SB
Devlin, JJ
AF Devlin, Sanaz Bayati
Devlin, John Joseph
TI Clinical Prediction Rules for Meningitis in Children Pretreated With
Antibiotics
SO PEDIATRICS
LA English
DT Letter
ID BACTERIAL-MENINGITIS; ASEPTIC-MENINGITIS; DISTINGUISH
C1 [Devlin, Sanaz Bayati] USN, Med Ctr Portsmouth, Dept Pediat, Portsmouth, VA USA.
[Devlin, John Joseph] USN, Med Ctr Portsmouth, Dept Emergency, Portsmouth, VA USA.
RP Devlin, SB (reprint author), USN, Med Ctr Portsmouth, Dept Pediat, Portsmouth, VA USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
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 FEB
PY 2009
VL 123
IS 2
BP E365
EP E366
DI 10.1542/peds.2008-3578
PG 5
WC Pediatrics
SC Pediatrics
GA 397RB
UT WOS:000262678700094
PM 19171599
ER
PT J
AU Krowne, CM
Shen, JQ
AF Krowne, Clifford M.
Shen, Jian Qi
TI Dressed-state mixed-parity transitions for realizing negative refractive
index
SO PHYSICAL REVIEW A
LA English
DT Article
DE atom-photon collisions; dressed states; metamaterials; quantum optics;
refractive index
ID LOW-FREQUENCY PLASMONS; LEFT-HANDEDNESS; MEDIA; PERMITTIVITY;
PERMEABILITY; TRANSMISSION; PROPAGATION; PARTICLES
AB The dressed states that are linear combinations of two bare levels of an atom (e.g., an alkali-metal atom) can be realized by a strong-coupling laser beam. As the dressed states have mixed parities, both electric- and magnetic-dipole-allowed transitions can occur between the dressed states and a third level with a definite (pure) parity. It is shown that such dressed-state mixed-parity transitions in an atomic vapor (the concept also applies in the solid state) can give rise to a negative refractive index. The produced negative refractive index is isotropic with atomic-scale microscopic structure units, and the negative real part can emerge in the optical frequency band. Also examined is the case of a fully quantized probe photonic field which interrogates the bottom dressed state and the third-level state. Similarities between the semiclassical approach for the weaker probe field and its fully quantum mechanical second-quantization treatment are discussed in regard to the off-diagonal density matrix element for the reduced 2x2 manifold, and its implications for the refractive index.
C1 [Krowne, Clifford M.] USN, Res Lab, Div Elect Sci & Technol, Microwave Technol Branch, Washington, DC 20375 USA.
[Shen, Jian Qi] Zhejiang Univ, Ctr Opt & Electromagnet Res, Hangzhou 310058, Peoples R China.
RP Krowne, CM (reprint author), USN, Res Lab, Div Elect Sci & Technol, Microwave Technol Branch, Washington, DC 20375 USA.
RI ZJU, COER/G-7876-2011; Zhejiang University, Dep. Optical
Eng./G-9022-2011
NR 33
TC 29
Z9 30
U1 0
U2 6
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 FEB
PY 2009
VL 79
IS 2
AR 023818
DI 10.1103/PhysRevA.79.023818
PG 11
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 413TI
UT WOS:000263815000156
ER
PT J
AU Dolgov, OV
Mazin, II
Parker, D
Golubov, AA
AF Dolgov, Oleg V.
Mazin, Igor I.
Parker, David
Golubov, Alexander A.
TI Interband superconductivity: Contrasts between Bardeen-Cooper-Schrieffer
and Eliashberg theories
SO PHYSICAL REVIEW B
LA English
DT Article
AB The recently discovered iron pnictide superconductors apparently present an unusual case of interband-channel pairing superconductivity. Here we show that in the limit where the pairing occurs within the interband channel, several surprising effects occur quite naturally and generally: different density of states on the two bands leads to several unusual properties, including a gap ratio which behaves inversely to the ratio of density of states; the weak-coupling limits of the Eliashberg and the BCS theories, commonly taken as equivalent, in fact predict qualitatively different dependence of the Delta(1)/Delta(2) and Delta/T(c) ratios on coupling constants. We show analytically that these effects follow directly from the interband character of superconductivity. Our results show that in the interband-only pairing model the maximal gap ratio is root N(2)/N(1) as strong-coupling effects act only to reduce this ratio. Our results show that pnictide BCS calculations must use renormalized coupling constants to get accurate results. Our results also suggest that if the large experimentally reported gap ratios (up to a factor 2) are correct, the pairing mechanism must include more intraband interaction than what is usually assumed.
C1 [Dolgov, Oleg V.] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
[Mazin, Igor I.; Parker, David] USN, Res Lab, Washington, DC 20375 USA.
[Golubov, Alexander A.] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands.
RP Dolgov, OV (reprint author), Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
RI Dolgov, Oleg/M-8120-2015
OI Dolgov, Oleg/0000-0001-8997-2671
NR 16
TC 56
Z9 56
U1 0
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD FEB
PY 2009
VL 79
IS 6
AR 060502
DI 10.1103/PhysRevB.79.060502
PG 4
WC Physics, Condensed Matter
SC Physics
GA 413TO
UT WOS:000263815600014
ER
PT J
AU Abelev, BI
Aggarwal, MM
Ahammed, Z
Anderson, BD
Arkhipkin, D
Averichev, GS
Bai, Y
Balewski, J
Barannikova, O
Barnby, LS
Baudot, J
Baumgart, S
Beavis, DR
Bellwied, R
Benedosso, F
Betts, RR
Bhardwaj, S
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Biritz, B
Bland, LC
Bombara, M
Bonner, BE
Botje, M
Bouchet, J
Braidot, E
Brandin, AV
Bueltmann, S
Burton, TP
Bystersky, M
Cai, XZ
Caines, H
Sanchez, MCD
Callner, J
Catu, O
Cebra, D
Cendejas, R
Cervantes, MC
Chajecki, Z
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Cheng, J
Cherney, M
Chikanian, A
Choi, KE
Christie, W
Chung, SU
Clarke, RF
Codrington, MJM
Coffin, JP
Cormier, TM
Cosentino, MR
Cramer, JG
Crawford, HJ
Das, D
Dash, S
Daugherity, M
de Moira, MM
Dedovich, TG
DePhillips, M
Derevschikov, AA
de Souza, RD
Didenko, L
Dictel, T
Djawotho, P
Dogra, SM
Dong, X
Drachenberg, JL
Draper, JE
Du, F
Dunlop, JC
Mazumdar, MRD
Edwards, WR
Efimov, LG
Elhalhuli, E
Elnimr, M
Emelianov, V
Engelage, J
Eppley, G
Erazmus, B
Estienne, M
Eun, L
Fachini, P
Fatemi, R
Fedorisin, J
Feng, A
Filip, P
Finch, E
Fine, V
Fisyak, Y
Gagliardi, CA
Gaillard, L
Gangadharan, DR
Ganti, MS
Garcia-Solis, E
Ghazikhanian, V
Ghosh, P
Gorbunov, YN
Gordon, A
Grebenyuk, O
Grosnick, D
Grube, B
Guertin, SM
Guimaraes, KSFF
Gupta, A
Gupta, N
Guryn, W
Hallman, TJ
Hamed, A
Harris, JW
He, W
Heinz, M
Heppelmann, S
Hippolyte, B
Hirsch, A
Hjort, E
Hoffman, AM
Hoffmann, GW
Hofman, DJ
Hollis, RS
Huang, HZ
Humanic, TJ
Huo, L
Igo, G
Iordanova, A
Jacobs, P
Jacobs, WW
Jakl, P
Jena, C
Jin, F
Jones, CL
Jones, PG
Joseph, J
Judd, EG
Kabana, S
Kajimoto, K
Kang, K
Kapitan, J
Kaplan, M
Keane, D
Kechechyan, A
Kettler, D
Khodyrev, VY
Kiryluk, J
Kisiel, A
Klein, SR
Knospe, AG
Kocoloski, A
Koetke, DD
Kopytine, M
Kotchenda, L
Kouchpil, V
Kravtsov, P
Kravtsov, VI
Krueger, K
Kuhn, C
Kumar, A
Kumar, L
Kurnadi, P
Lamont, MAC
Landgraf, JM
LaPointe, S
Laue, F
Lauret, J
Lebedev, A
Lednicky, R
Lee, CH
LeVine, MJ
Li, C
Li, Y
Lin, G
Lin, X
Lindenbaum, SJ
Lisa, MA
Liu, F
Liu, J
Liu, L
Ljubicic, T
Llope, WJ
Longacre, RS
Lu, Y
Ludlam, T
Lynn, D
Ma, GL
Ma, JG
Ma, YG
Mahapatra, DP
Majka, R
Mangotra, LK
Manweiler, R
Margetis, S
Markert, C
Matis, HS
Matulenko, YA
McShane, TS
Meschanin, A
Millane, J
Miller, ML
Minaev, NG
Mioduszewski, S
Mischke, A
Mitchell, J
Mohanty, B
Morozov, DA
Munhoz, MG
Nandi, BK
Nattrass, C
Nayak, TK
Nelson, JM
Nepali, C
Netrakanti, PK
Ng, MJ
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Okada, H
Okorokov, V
Olson, D
Pachr, M
Pal, SK
Panebratsev, Y
Pawlak, T
Peitzmann, T
Perevoztchikov, V
Perkins, C
Peryt, W
Phatak, SC
Planinic, M
Pluta, J
Poljak, N
Porile, N
Poskanzer, AM
Potekhin, M
Potukuchi, BVKS
Prindle, D
Pruneau, C
Pruthi, NK
Putschke, J
Raniwala, R
Raniwala, S
Ray, RL
Ridiger, A
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Rose, A
Roy, C
Ruan, L
Russcher, MJ
Rykov, V
Sahoo, R
Sakrejda, I
Sakuma, T
Salur, S
Sandweiss, J
Sarsour, M
Schambach, J
Scharenberg, RP
Schmitz, N
Seger, J
Selyuzhenkov, I
Seyboth, P
Shabetai, A
Shahaliev, E
Shao, M
Sharma, M
Shi, SS
Shi, XH
Sichtermann, EP
Simon, F
Singaraju, RN
Skoby, MJ
Smirnov, N
Snellings, R
Sorensen, P
Sowinski, J
Spinka, HM
Srivastava, B
Stadnik, A
Stanislaus, TDS
Staszak, D
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Subba, NL
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Timoshenko, S
Tokarev, M
Tram, VN
Trattner, AL
Trentalange, S
Tribble, RE
Tsai, OD
Ulery, J
Ullrich, T
Underwood, DG
Buren, GV
van der Kolk, N
van Leeuwen, M
Molen, AMV
Varma, R
Vasconcelos, GMS
Vasilevski, IM
Vasiliev, AN
Videbaek, F
Vigdor, SE
Viyogi, YP
Vokal, S
Voloshin, SA
Wada, M
Waggoner, WT
Wang, F
Wang, G
Wang, JS
Wang, Q
Wang, X
Wang, XL
Wang, Y
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wissink, SW
Witt, R
Wu, J
Wu, Y
Xu, N
Xu, QH
Xu, Y
Xu, Z
Yepes, P
Yoo, IK
Yue, Q
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, H
Zhang, S
Zhang, WM
Zhang, Y
Zhang, ZP
Zhao, Y
Zhong, C
Zhou, J
Zoulkarneev, R
Zoulkarneeva, Y
Zuo, JX
AF Abelev, B. I.
Aggarwal, M. M.
Ahammed, Z.
Anderson, B. D.
Arkhipkin, D.
Averichev, G. S.
Bai, Y.
Balewski, J.
Barannikova, O.
Barnby, L. S.
Baudot, J.
Baumgart, S.
Beavis, D. R.
Bellwied, R.
Benedosso, F.
Betts, R. R.
Bhardwaj, S.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Biritz, B.
Bland, L. C.
Bombara, M.
Bonner, B. E.
Botje, M.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bueltmann, S.
Burton, T. P.
Bystersky, M.
Cai, X. Z.
Caines, H.
Sanchez, M. Calderon de la Barca
Callner, J.
Catu, O.
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chajecki, Z.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Cheng, J.
Cherney, M.
Chikanian, A.
Choi, K. E.
Christie, W.
Chung, S. U.
Clarke, R. F.
Codrington, M. J. M.
Coffin, J. P.
Cormier, T. M.
Cosentino, M. R.
Cramer, J. G.
Crawford, H. J.
Das, D.
Dash, S.
Daugherity, M.
de Moira, M. M.
Dedovich, T. G.
DePhillips, M.
Derevschikov, A. A.
de Souza, R. Derradi
Didenko, L.
Dictel, T.
Djawotho, P.
Dogra, S. M.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Du, F.
Dunlop, J. C.
Mazumdar, M. R. Dutta
Edwards, W. R.
Efimov, L. G.
Elhalhuli, E.
Elnimr, M.
Emelianov, V.
Engelage, J.
Eppley, G.
Erazmus, B.
Estienne, M.
Eun, L.
Fachini, P.
Fatemi, R.
Fedorisin, J.
Feng, A.
Filip, P.
Finch, E.
Fine, V.
Fisyak, Y.
Gagliardi, C. A.
Gaillard, L.
Gangadharan, D. R.
Ganti, M. S.
Garcia-Solis, E.
Ghazikhanian, V.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Grebenyuk, O.
Grosnick, D.
Grube, B.
Guertin, S. M.
Guimaraes, K. S. F. F.
Gupta, A.
Gupta, N.
Guryn, W.
Hallman, T. J.
Hamed, A.
Harris, J. W.
He, W.
Heinz, M.
Heppelmann, S.
Hippolyte, B.
Hirsch, A.
Hjort, E.
Hoffman, A. M.
Hoffmann, G. W.
Hofman, D. J.
Hollis, R. S.
Huang, H. Z.
Humanic, T. J.
Huo, L.
Igo, G.
Iordanova, A.
Jacobs, P.
Jacobs, W. W.
Jakl, P.
Jena, C.
Jin, F.
Jones, C. L.
Jones, P. G.
Joseph, J.
Judd, E. G.
Kabana, S.
Kajimoto, K.
Kang, K.
Kapitan, J.
Kaplan, M.
Keane, D.
Kechechyan, A.
Kettler, D.
Khodyrev, V. Yu.
Kiryluk, J.
Kisiel, A.
Klein, S. R.
Knospe, A. G.
Kocoloski, A.
Koetke, D. D.
Kopytine, M.
Kotchenda, L.
Kouchpil, V.
Kravtsov, P.
Kravtsov, V. I.
Krueger, K.
Kuhn, C.
Kumar, A.
Kumar, L.
Kurnadi, P.
Lamont, M. A. C.
Landgraf, J. M.
LaPointe, S.
Laue, F.
Lauret, J.
Lebedev, A.
Lednicky, R.
Lee, C.-H.
LeVine, M. J.
Li, C.
Li, Y.
Lin, G.
Lin, X.
Lindenbaum, S. J.
Lisa, M. A.
Liu, F.
Liu, J.
Liu, L.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Lu, Y.
Ludlam, T.
Lynn, D.
Ma, G. L.
Ma, J. G.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mangotra, L. K.
Manweiler, R.
Margetis, S.
Markert, C.
Matis, H. S.
Matulenko, Yu. A.
McShane, T. S.
Meschanin, A.
Millane, J.
Miller, M. L.
Minaev, N. G.
Mioduszewski, S.
Mischke, A.
Mitchell, J.
Mohanty, B.
Morozov, D. A.
Munhoz, M. G.
Nandi, B. K.
Nattrass, C.
Nayak, T. K.
Nelson, J. M.
Nepali, C.
Netrakanti, P. K.
Ng, M. J.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Okada, H.
Okorokov, V.
Olson, D.
Pachr, M.
Pal, S. K.
Panebratsev, Y.
Pawlak, T.
Peitzmann, T.
Perevoztchikov, V.
Perkins, C.
Peryt, W.
Phatak, S. C.
Planinic, M.
Pluta, J.
Poljak, N.
Porile, N.
Poskanzer, A. M.
Potekhin, M.
Potukuchi, B. V. K. S.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Putschke, J.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Ridiger, A.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Rose, A.
Roy, C.
Ruan, L.
Russcher, M. J.
Rykov, V.
Sahoo, R.
Sakrejda, I.
Sakuma, T.
Salur, S.
Sandweiss, J.
Sarsour, M.
Schambach, J.
Scharenberg, R. P.
Schmitz, N.
Seger, J.
Selyuzhenkov, I.
Seyboth, P.
Shabetai, A.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, S. S.
Shi, X. -H.
Sichtermann, E. P.
Simon, F.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Snellings, R.
Sorensen, P.
Sowinski, J.
Spinka, H. M.
Srivastava, B.
Stadnik, A.
Stanislaus, T. D. S.
Staszak, D.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Subba, N. L.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Symons, T. J. M.
de Toledo, A. Szanto
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Timoshenko, S.
Tokarev, M.
Tram, V. N.
Trattner, A. L.
Trentalange, S.
Tribble, R. E.
Tsai, O. D.
Ulery, J.
Ullrich, T.
Underwood, D. G.
Buren, G. Van
van der Kolk, N.
van Leeuwen, M.
Molen, A. M. Vander
Varma, R.
Vasconcelos, G. M. S.
Vasilevski, I. M.
Vasiliev, A. N.
Videbaek, F.
Vigdor, S. E.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Waggoner, W. T.
Wang, F.
Wang, G.
Wang, J. S.
Wang, Q.
Wang, X.
Wang, X. L.
Wang, Y.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Wu, J.
Wu, Y.
Xu, N.
Xu, Q. H.
Xu, Y.
Xu, Z.
Yepes, P.
Yoo, I. -K.
Yue, Q.
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, H.
Zhang, S.
Zhang, W. M.
Zhang, Y.
Zhang, Z. P.
Zhao, Y.
Zhong, C.
Zhou, J.
Zoulkarneev, R.
Zoulkarneeva, Y.
Zuo, J. X.
CA STAR Collaboration
TI Beam-energy and system-size dependence of dynamical net charge
fluctuations
SO PHYSICAL REVIEW C
LA English
DT Article
ID MEAN TRANSVERSE-MOMENTUM; BY-EVENT FLUCTUATIONS; HEAVY-ION COLLISIONS;
QUARK-GLUON PLASMA; NUCLEAR COLLISIONS; AU COLLISIONS; MULTIPLICITY;
SIGNAL; GEV/C
AB We present measurements of net charge fluctuations in Au+Au collisions at s(NN)=19.6, 62.4, 130, and 200 GeV, Cu+Cu collisions at s(NN)=62.4 and 200 GeV, and p+p collisions at s=200 GeV using the dynamical net charge fluctuations measure nu(+-,dyn). We observe that the dynamical fluctuations are nonzero at all energies and exhibit a modest dependence on beam energy. A weak system size dependence is also observed. We examine the collision centrality dependence of the net charge fluctuations and find that dynamical net charge fluctuations violate 1/N-ch scaling but display approximate 1/N-part scaling. We also study the azimuthal and rapidity dependence of the net charge correlation strength and observe strong dependence on the azimuthal angular range and pseudorapidity widths integrated to measure the correlation.
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[Chajecki, Z.; Humanic, T. J.; Kisiel, A.; Lisa, M. A.] Ohio State Univ, Columbus, OH 43210 USA.
[Bueltmann, S.] Old Dominion Univ, Norfolk, VA 23529 USA.
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[Eun, L.; Heppelmann, S.] Penn State Univ, University Pk, PA 16802 USA.
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[Bhardwaj, S.; Raniwala, R.; Raniwala, S.] Univ Rajasthan, Jaipur 302004, Rajasthan, India.
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[de Moira, M. M.; Guimaraes, K. S. F. F.; Munhoz, M. G.; Suaide, A. A. P.; de Toledo, A. Szanto] Univ Sao Paulo, Sao Paulo, Brazil.
[Chen, H. F.; Lee, C.-H.; Lu, Y.; Shao, M.; Sun, Y.; Tang, Z.; Wang, X. L.; Wu, J.; Wu, Y.] Univ Sci & Technol China, Hefei 230026, Peoples R China.
[Xu, Q. H.] Shandong Univ, Jinan 250100, Shandong, Peoples R China.
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[Cervantes, M. C.; Clarke, R. F.; Codrington, M. J. M.; Djawotho, P.; Draper, J. E.; Gagliardi, C. A.; Hamed, A.; Huo, L.; Mioduszewski, S.; Sarsour, M.; Tribble, R. E.] Texas A&M Univ, College Stn, TX 77843 USA.
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[Laue, F.; Pawlak, T.; Peryt, W.; Pluta, J.] Warsaw Univ Technol, Warsaw, Poland.
[Bichsel, H.; Cramer, J. G.; Kettler, D.; Prindle, D.] Univ Washington, Seattle, WA 98195 USA.
[Balewski, J.; Cormier, T. M.; Elnimr, M.; LaPointe, S.; McShane, T. S.; Pruneau, C.; Voloshin, S. A.] Wayne State Univ, Detroit, MI 48201 USA.
[Chen, H. F.; Feng, A.; Liu, F.; Liu, J.; Shi, S. S.; Wu, J.; Wu, Y.] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Baumgart, S.; Catu, O.; Chikanian, A.; Du, F.] Yale Univ, New Haven, CT 06520 USA.
[Planinic, M.; Poljak, N.] Univ Zagreb, HR-10002 Zagreb, Croatia.
[Kaplan, M.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
RP Abelev, BI (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Fornazier Guimaraes, Karin Silvia/H-4587-2016; Barnby, Lee/G-2135-2010;
Mischke, Andre/D-3614-2011; Takahashi, Jun/B-2946-2012; Planinic,
Mirko/E-8085-2012; Peitzmann, Thomas/K-2206-2012; Witt,
Richard/H-3560-2012; Voloshin, Sergei/I-4122-2013; Lednicky,
Richard/K-4164-2013; Cosentino, Mauro/L-2418-2014; Sumbera,
Michal/O-7497-2014; Strikhanov, Mikhail/P-7393-2014; Dogra, Sunil
/B-5330-2013; Chaloupka, Petr/E-5965-2012; Nattrass,
Christine/J-6752-2016; Derradi de Souza, Rafael/M-4791-2013; Suaide,
Alexandre/L-6239-2016; van der Kolk, Naomi/M-9423-2016; Inst. of
Physics, Gleb Wataghin/A-9780-2017; Okorokov, Vitaly/C-4800-2017; Ma,
Yu-Gang/M-8122-2013;
OI Fornazier Guimaraes, Karin Silvia/0000-0003-0578-9533; Barnby,
Lee/0000-0001-7357-9904; Takahashi, Jun/0000-0002-4091-1779; Peitzmann,
Thomas/0000-0002-7116-899X; Cosentino, Mauro/0000-0002-7880-8611;
Sumbera, Michal/0000-0002-0639-7323; Strikhanov,
Mikhail/0000-0003-2586-0405; Nattrass, Christine/0000-0002-8768-6468;
Derradi de Souza, Rafael/0000-0002-2084-7001; Suaide,
Alexandre/0000-0003-2847-6556; van der Kolk, Naomi/0000-0002-8670-0408;
Okorokov, Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900;
Mohanty, Bedangadas/0000-0001-9610-2914; Fisyak,
Yuri/0000-0002-3151-8377; Bhasin, Anju/0000-0002-3687-8179; Sorensen,
Paul/0000-0001-5056-9391; Thomas, James/0000-0002-6256-4536; van
Leeuwen, Marco/0000-0002-5222-4888
FU RHIC Operations Group; RCF at BNL; NERSC Center at LBNL; Offices of NP
and HEP; US DOE Office of Science; US NSF; Sloan Foundation; DFG
Excellence Cluster EXC153 of Germany; CNRS/IN2P3; RA; RPL; EMN of
France; STFC; EPSRC of the United Kingdom; FAPESP of Brazil,; Russian
Ministry of Science and Technology; NNSFC; CAS; MoST; MoE of China; IRP;
GA of the Czech Republic; FOM of the Netherlands; DAE; DST; CSIR of the
Government of India; Swiss NSF; Polish State Committee for Scientific
Research; Slovak Research and Development Agency; Korea Science &
Engineering Foundation
FX We thank the RHIC Operations Group and RCF at BNL, and the NERSC Center
at LBNL and the resources provided by the Open Science Grid Consortium
for their support. This work was supported in part by the Offices of NP
and HEP within the US DOE Office of Science, the US NSF, the Sloan
Foundation, the DFG Excellence Cluster EXC153 of Germany, CNRS/IN2P3,
RA, RPL, and EMN of France, STFC and EPSRC of the United Kingdom, FAPESP
of Brazil, the Russian Ministry of Science and Technology, the NNSFC,
CAS, MoST, and MoE of China, IRP and GA of the Czech Republic, FOM of
the Netherlands, DAE, DST, and CSIR of the Government of India, Swiss
NSF, the Polish State Committee for Scientific Research, Slovak Research
and Development Agency, and the Korea Science & Engineering Foundation.
NR 57
TC 27
Z9 28
U1 0
U2 11
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD FEB
PY 2009
VL 79
IS 2
AR 024906
DI 10.1103/PhysRevC.79.024906
PG 14
WC Physics, Nuclear
SC Physics
GA 413TW
UT WOS:000263816400052
ER
PT J
AU Davis, J
Petrov, GM
AF Davis, J.
Petrov, G. M.
TI Generation of GeV ion bunches from high-intensity laser-target
interactions
SO PHYSICS OF PLASMAS
LA English
DT Article
DE gold; hydrogen; ion sources; lithium compounds; organic compounds;
particle beam bunching; plasma production by laser; plasma simulation
ID PROTON GENERATION; ACCELERATION; PULSES; PLASMA; ULTRAINTENSE
AB The formation of near GeV light ions from the interaction of an intense ultrashort pulse laser with thin planar targets is investigated theoretically. The study is done with a two-dimensional relativistic electromagnetic particle-in-cell model for peak laser intensities exceeding 10(25) W/m(2) (10(21) W/cm(2)), laser pulse duration of 40 fs (full width at half maximum), and wavelength of 1 mu m. A set of uniform targets (H, LiH, and CH(2)) and double-layer targets (Li-CH(2) and Au-CH(2)) is employed. Targets with realistic parameters have been chosen: effective thickness of 1.2 mu m, electron density of (0.8-6)x10(29) m(-3), and areal electron density of (1-7)x10(23) m(-2). The energy absorption, conversion efficiency of laser energy into proton kinetic energy, and maximum proton energy are studied as a function of laser fluence, and the potential of each target to achieve the goal of generating proton beams with energy in the GeV range is discussed. The most promising targets are made of low-Z material (lithium). GeV protons from similar to 1 mu m thick LiH foil can be generated at laser intensity I(0)congruent to 10(27) W/m(2) (10(23) W/cm(2)) and laser fluence F(0)congruent to 40 J/mu m(2), just at the leading edge of modern laser systems. Other light ions, such as Li(3+), C(6+), and Al(13+), can be accelerated to GeV energy with existing laser systems at laser fluence of 10-20 J/mu m(2).
C1 [Davis, J.; Petrov, G. M.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Davis, J (reprint author), USN, Res Lab, Div Plasma Phys, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM jack.davis@nrl.navy.mil; george.petrov@nrl.navy.mil
FU Defense Threat Reduction Agency (DTRA); Naval Research Laboratory (NRL)
FX This work was supported by the Defense Threat Reduction Agency (DTRA)
and the Naval Research Laboratory (NRL) under the ONR 6.1 program.
NR 38
TC 24
Z9 25
U1 1
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 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD FEB
PY 2009
VL 16
IS 2
AR 023105
DI 10.1063/1.3074519
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 413NS
UT WOS:000263800400044
ER
PT J
AU Fernsler, RF
AF Fernsler, R. F.
TI Modeling Langmuir probes in multi-component plasmas
SO PLASMA SOURCES SCIENCE & TECHNOLOGY
LA English
DT Article
ID COLLISIONLESS PLASMA; BOHM CRITERION; SHEATH EDGE; COLLECTION;
DENSITIES; SYSTEM
AB Langmuir probes are conceptually simple devices and have long been the primary diagnostic for plasmas, but interpreting the output is rarely straightforward, even in plasmas consisting of Maxwellian electrons and a single ion species. The problem is worse yet in more complicated plasmas where theoretical calculations are lacking. To help interpret probe data, this work presents a numerical scheme capable of modeling spherical and cylindrical probes in plasmas containing any number of charged species, positive or negative. The scheme is based on solving the derivative of Poisson's equation as an initial-value problem rather than solving Poisson's equation as a boundary-value problem. Because the new equation is linear in the electric field, stable solutions are possible. The same approach can be used with other nonlinear ordinary differential equations as well, but in most cases the initial conditions must be adjusted until the original boundary conditions are satisfied. Fortunately, this difficulty is easily circumvented for certain types of problems, including Langmuir probes. Accordingly, Langmuir probes can be modeled quickly and easily, even in plasmas containing multiple ion species and multi-temperature electrons. Examples are given for electropositive plasmas, electronegative plasmas, and two-temperature electrons.
C1 USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Fernsler, RF (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
NR 32
TC 11
Z9 11
U1 1
U2 12
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 FEB
PY 2009
VL 18
IS 1
AR 014012
DI 10.1088/0963-0252/18/1/014012
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 400VN
UT WOS:000262897600014
ER
PT J
AU Warner, CH
Appenzeller, GN
Warner, CM
Grieger, T
AF Warner, Christopher H.
Appenzeller, George N.
Warner, Carolynn M.
Grieger, Thomas
TI Psychological Effects of Deployments of Military Families
SO PSYCHIATRIC ANNALS
LA English
DT Article
ID POSTTRAUMATIC-STRESS-DISORDER; MENTAL-HEALTH PROBLEMS; OPERATION
DESERT-STORM; PERSIAN-GULF; SOLDIERS; VETERANS; SPOUSES; WAR; COMBAT;
WIVES
C1 [Warner, Christopher H.] USA, Dept Behav Hlth, Winn Army Community Hosp, Ft Stewart, GA 31314 USA.
[Appenzeller, George N.] USA, Clin Serv, Winn Army Community Hosp, Ft Stewart, GA 31314 USA.
[Grieger, Thomas] Uniformed Serv Univ Hlth Sci, USN, Dept Psychiat, Bethesda, MD 20814 USA.
RP Warner, CH (reprint author), USA, Dept Behav Hlth, Winn Army Community Hosp, Ft Stewart, GA 31314 USA.
NR 25
TC 23
Z9 23
U1 1
U2 4
PU SLACK INC
PI THOROFARE
PA 6900 GROVE RD, THOROFARE, NJ 08086 USA
SN 0048-5713
J9 PSYCHIAT ANN
JI Psychiatr. Ann.
PD FEB
PY 2009
VL 39
IS 2
BP 56
EP 63
PG 8
WC Psychiatry
SC Psychiatry
GA 411EW
UT WOS:000263632100005
ER
PT J
AU Kennedy, CH
Johnson, WB
AF Kennedy, Carrie H.
Johnson, W. Brad
TI Mixed Agency in Military Psychology: Applying the American Psychological
Association Ethics Code
SO PSYCHOLOGICAL SERVICES
LA English
DT Article
DE dual agency; mixed agency; ethics; military psychology; detainee
AB Military psychology can diverge significantly from traditional psychological practice. Mixed-agency conflicts-those arising when a military psychologist's obligations to individual patients compete with obligations to the Department of Defense or federal regulations-can generate challenging ethical dilemmas. This article explores the notion of mixed agency within the military setting and addresses the most pertinent aspects of the American Psychological Association's (2002) Ethical Principles of Psychologists and Code of Conduct related to this ethical challenge. Case vignettes are presented as a means of illustrating key mixed-agency dilemmas and the effective navigation of these conflicts. The article concludes with several recommendations for military psychologists as they work to anticipate and effectively manage ethical dilemmas bearing on their dual identities as officer and health care provider.
C1 [Kennedy, Carrie H.] USN, Aerosp Med Inst, Pensacola, FL 32508 USA.
[Johnson, W. Brad] USN Acad, Annapolis, MD 21402 USA.
RP Kennedy, CH (reprint author), USN, Aerosp Med Inst, 340 Hulse Rd, Pensacola, FL 32508 USA.
EM CHK2F@hscmail.mcc.virginia.edu
NR 33
TC 8
Z9 8
U1 1
U2 1
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 1541-1559
J9 PSYCHOL SERV
JI Psychol. Serv.
PD FEB
PY 2009
VL 6
IS 1
BP 22
EP 31
DI 10.1037/a0014602
PG 10
WC Psychology, Clinical
SC Psychology
GA V18FX
UT WOS:000207991800003
ER
PT J
AU Luginbuhl, CB
Lockwood, GW
Davis, DR
Pick, K
Selders, J
AF Luginbuhl, Christian B.
Lockwood, G. Wesley
Davis, Donald R.
Pick, Kevin
Selders, Jennifer
TI From The Ground Up I: Light Pollution Sources in Flagstaff, Arizona
SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
LA English
DT Article
ID NIGHT-SKY BRIGHTNESS; SITES; ILLUMINATION; GLOW
AB We develop an estimate of the complete outdoor lighting of Flagstaff Arizona, as well as lighting-use densities (lumens per acre) for a number of different land uses. We find a total outdoor light output of 173 million lumens (Mlm) including sports lighting, and 139 Mlm without sports lighting, with an uncertainty of about 7%. The average fraction escaping directly upward from light fixtures is estimated to be 8.3%. After correcting approximately for near-ground blocking described in the accompanying paper by Luginbuhl et al., total uplight is estimated at 17.9 Mlm or 12.2 Mlm with and without sports lighting, respectively. Of these 17.9 Mlm, 33% arise from sports lighting, when it is on; when sports lighting is off, commercial and industrial lighting account for 62% with the remainder dominated by residential (14%) and roadway lighting (12%). We show that the 1989 Flagstaff lighting code that limited total outdoor lighting on new construction has reduced the growth rate of lighting, resulting in a 17% growth in light escaping into the sky from 1989 to 2003, compared to a 43% increase expected if the 1989 code had not been enacted. If all legally nonconforming lighting installed before 1989 were to be brought into compliance with the code, we would expect sky glow in Flagstaff to actually decrease by 36% compared to that in 2003; if all lighting, including residential, could be converted to fully shielded fixtures, sky glow would decrease to about half the current value. The implications for the most effective ways to address sky glow through lighting codes are discussed.
C1 [Luginbuhl, Christian B.] USN Observ, Flagstaff Stn, Flagstaff, AZ 86001 USA.
[Lockwood, G. Wesley] Lowell Observ, Flagstaff, AZ 86001 USA.
[Davis, Donald R.] Planetary Sci Inst, Tucson, AZ 85719 USA.
[Pick, Kevin; Selders, Jennifer] No Arizona Univ, Flagstaff, AZ 86011 USA.
RP Luginbuhl, CB (reprint author), USN Observ, Flagstaff Stn, Flagstaff, AZ 86001 USA.
EM cbl@nofs.navy.mil; gwl@lowell.edu; drd@psi.edu
NR 35
TC 31
Z9 31
U1 2
U2 9
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-6280
J9 PUBL ASTRON SOC PAC
JI Publ. Astron. Soc. Pac.
PD FEB
PY 2009
VL 121
IS 876
BP 185
EP 203
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 414WA
UT WOS:000263894700010
ER
PT J
AU Luginbuhl, CB
Duriscoe, DM
Moore, CW
Richman, A
Lockwood, GW
Davis, DR
AF Luginbuhl, Christian B.
Duriscoe, Dan M.
Moore, Chadwick W.
Richman, Angela
Lockwood, G. Wesley
Davis, Donald R.
TI From the Ground Up II: Sky Glow and Near-Ground Artificial Light
Propagation in Flagstaff, Arizona
SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
LA English
DT Article
ID BRIGHTNESS; POLLUTION
AB We present panoramic sky brightness measures in the Johnson V band made at the US Naval Observatory Flagstaff Station. We find that these measures show much less sky glow from Flagstaff than expected using the total light output and unshielded fraction determined recently by Luginbuhl et al. and Garstang's 1991 modeling approach. We suggest the difference arises principally from the diminution of upward-directed light after emission from light fixtures and reflection from the ground due to interaction with structures and vegetation. This interaction not only reduces the effective albedo, it also disproportionately reduces flux emitted upward at angles near the horizontal. We explore the size and consequences of this factor in light
C1 [Luginbuhl, Christian B.] USN Observ, Flagstaff Stn, Flagstaff, AZ 86001 USA.
[Duriscoe, Dan M.] Natl Pk Serv, Bishop, CA USA.
[Moore, Chadwick W.] Colorado State Univ, CIRA, Natl Pk Serv, Ft Collins, CO 80523 USA.
[Richman, Angela] Curecanti NRA, Natl Pk Serv, Gunnison, CO 81230 USA.
[Lockwood, G. Wesley] Lowell Observ, Flagstaff, AZ 86001 USA.
[Davis, Donald R.] Planetary Sci Inst, Tucson, AZ 85719 USA.
RP Luginbuhl, CB (reprint author), USN Observ, Flagstaff Stn, Flagstaff, AZ 86001 USA.
EM cbl@nofs.navy.mil; dan_duriscoe@nps.gov; moore@cira.colostate.edu;
angie_richman@nps.gov; gwl@lowell.edu; drd@psi.edu
FU Planetary Science Institute
FX D. R. D. acknowledges the support of the Planetary Science Institute.
NR 10
TC 27
Z9 27
U1 0
U2 1
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-6280
J9 PUBL ASTRON SOC PAC
JI Publ. Astron. Soc. Pac.
PD FEB
PY 2009
VL 121
IS 876
BP 204
EP 212
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 414WA
UT WOS:000263894700011
ER
PT J
AU Bernstein, N
Kermode, JR
Csanyi, G
AF Bernstein, N.
Kermode, J. R.
Csanyi, G.
TI Hybrid atomistic simulation methods for materials systems
SO REPORTS ON PROGRESS IN PHYSICS
LA English
DT Review
ID MOLECULAR-DYNAMICS SIMULATIONS; FINNIS-SINCLAIR POTENTIALS;
QUASI-CONTINUUM MODELS; TIGHT-BINDING; DENSITY-MATRIX; PARALLEL
COMPUTERS; QM/MM APPROACH; CRACK TIP; SILICON; FRACTURE
AB We review recent progress in the methodology of hybrid quantum/classical (QM/MM) atomistic simulations for solid-state systems, from the earliest reports in 1993 up to the latest results. A unified terminology is defined into which the various and disparate schemes fit, based on whether the information from the QM and MM calculations is combined at the level of energies or forces. We discuss the pertinent issues for achieving 'seamless' coupling, the advantages and disadvantages of the proposed schemes and summarize the applications and scientific results that have been obtained to date.
C1 [Bernstein, N.] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
[Kermode, J. R.] Univ Cambridge, Cavendish Lab, TCM Grp, Cambridge CB3 0HE, England.
[Kermode, J. R.; Csanyi, G.] Univ Cambridge, Engn Lab, Cambridge CB2 1PZ, England.
RP Bernstein, N (reprint author), USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
EM noam.bernstein@nrl.navy.mil; jrk33@cam.ac.uk; gc121@cam.ac.uk
RI Cavendish, TCM/C-9489-2009; Kermode, James/O-6631-2014
OI Kermode, James/0000-0001-6755-6271
FU EPSRC [EP/C52392X/1]
FX The authors would like to acknowledge helpful discussions with Steven
Winfield who suggested the momentum-conserving abrupt force-mixing
method. Computing resources were provided by the HPCS at the University
of Cambridge. NB would like to thank the NRL and the ONR for providing
funding and the US DOD HPCMPO for computing resources. GC and JRK would
like to acknowledge funding from the EPSRC under Grant no EP/C52392X/1.
NR 82
TC 71
Z9 71
U1 2
U2 30
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0034-4885
EI 1361-6633
J9 REP PROG PHYS
JI Rep. Prog. Phys.
PD FEB
PY 2009
VL 72
IS 2
AR 026501
DI 10.1088/0034-4885/72/2/026501
PG 25
WC Physics, Multidisciplinary
SC Physics
GA 399FN
UT WOS:000262785900001
ER
PT J
AU Myers, MC
Swanekamp, SB
Friedman, M
Hegeler, F
AF Myers, M. C.
Swanekamp, S. B.
Friedman, M.
Hegeler, F.
TI Measurement of the energy distribution of an intense electron beam in an
external magnetic field
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
DE electron beams; electron field emission; energy measurement; high-speed
optical techniques; particle beam diagnostics; time resolved spectra
ID LINEAR INVERSE PROBLEMS; KRF LASERS; FUSION ENERGY; DISCRETE-DATA;
SPECTROMETER; TRANSPORT; DIODES; CELL
AB An energy analyzer device has been developed which utilizes a series of stacked foils and Rogowski current monitors to the measure time resolved current of an intense electron beam. The energy distribution of the electron beam is unfolded from measured current ratios using computer simulations. This device is particularly useful where electron beams are guided by external magnetic fields which may make other electron energy measurement techniques difficult. This technique was used to determine the energy distribution of a 550 keV, 95 kA electron beam as it propagates in the gas mixture of a high power KrF laser. The resulting energy distributions at various depths in the gas are in agreement with three-dimensional particle-in-cell simulations providing confidence in the measurement technique.
C1 [Myers, M. C.] Div Plasma Phys, Naval Res Lab, Washington, DC 20375 USA.
[Swanekamp, S. B.] L3 Commun, Reston, VA 20190 USA.
[Friedman, M.; Hegeler, F.] Commonwealth Technol Inc, Alexandria, VA 22315 USA.
RP Myers, MC (reprint author), Div Plasma Phys, Naval Res Lab, Washington, DC 20375 USA.
NR 31
TC 2
Z9 2
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 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD FEB
PY 2009
VL 80
IS 2
AR 023504
DI 10.1063/1.3082041
PG 7
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 413OX
UT WOS:000263803500012
PM 19256645
ER
PT J
AU Carroll, CG
Campbell, WW
AF Carroll, Craig G.
Campbell, William W.
TI Multiple Cranial Neuropathies
SO SEMINARS IN NEUROLOGY
LA English
DT Article
DE Multiple cranial neuropathy; cranial neuropathies; cranial nerve
palsies; cranial nerve syndromes; cranial polyneuropathies
ID STEADY-STATE ACQUISITION; CENTRAL-NERVOUS-SYSTEM; CHRONIC MENINGITIS;
NEUROLOGIC MANIFESTATIONS; WEGENERS-GRANULOMATOSIS; TUBERCULOUS
MENINGITIS; SJOGRENS-SYNDROME; DISEASE; PACHYMENINGITIS; LEPTOMENINGEAL
AB Patients presenting with multiple cranial neuropathies are not uncommon in neurologic clinical practice. The evaluation of these patients can often be overwhelming due to the vast and complicated etiologies as well as the potential for devastating neurologic outcomes. Dysfunction of the cranial nerves can occur anywhere in their course from intrinsic brainstem dysfunction to their peripheral courses. The focus of this review win be on the extramedullary causes of multiple cranial neuropathies as discussion of the brainstem syndromes is more relevant when considering intrinsic disorders of the brainstem. The goals are to provide the reader with an overview of those extramedullary conditions that have a predilection for causing multiple cranial nerve palsies. In turn, this will serve to provide a practical and systematic approach to allow for a more targeted diagnostic evaluation of this, often cumbersome, presentation.
C1 [Carroll, Craig G.] Naval Med Ctr Portsmouth, Dept Neurol, Portsmouth, VA 23708 USA.
[Campbell, William W.] Uniformed Serv Univ Hlth Sci, Dept Neurol, Bethesda, MD 20814 USA.
RP Carroll, CG (reprint author), Naval Med Ctr Portsmouth, Dept Neurol, 620 John Paul Jones Circle, Portsmouth, VA 23708 USA.
EM craig.carroll@med.navy.mil
NR 61
TC 5
Z9 5
U1 1
U2 6
PU THIEME MEDICAL PUBL INC
PI NEW YORK
PA 333 SEVENTH AVE, NEW YORK, NY 10001 USA
SN 0271-8235
J9 SEMIN NEUROL
JI Semin. Neurol.
PD FEB
PY 2009
VL 29
IS 1
BP 53
EP 65
DI 10.1055/s-0028-1124023
PG 13
WC Clinical Neurology
SC Neurosciences & Neurology
GA 442WR
UT WOS:000265871900008
PM 19214933
ER
PT J
AU Kilpua, EKJ
Liewer, PC
Farrugia, C
Luhmann, JG
Moestl, C
Li, Y
Liu, Y
Lynch, BJ
Russell, CT
Vourlidas, A
Acuna, MH
Galvin, AB
Larson, D
Sauvaud, JA
AF Kilpua, E. K. J.
Liewer, P. C.
Farrugia, C.
Luhmann, J. G.
Moestl, C.
Li, Y.
Liu, Y.
Lynch, B. J.
Russell, C. T.
Vourlidas, A.
Acuna, M. H.
Galvin, A. B.
Larson, D.
Sauvaud, J. A.
TI Multispacecraft Observations of Magnetic Clouds and Their Solar Origins
between 19 and 23 May 2007
SO SOLAR PHYSICS
LA English
DT Article
DE Magnetic cloud; Solar wind; Coronal mass ejection; Helmet streamer
ID CORONAL MASS EJECTIONS; FLUX ROPES; WIND; 1-AU; RECONNECTION; DIRECTION;
DYNAMICS; ARCADES; EVENTS; FIELD
AB We analyze a series of complex interplanetary events and their solar origins that occurred between 19 and 23 May 2007 using observations by the STEREO and Wind satellites. The analyses demonstrate the new opportunities offered by the STEREO configuration for diagnosing the structure of in situ events and relating them to their sources. The investigated period was characterized by two high-speed solar wind and magnetic clouds observed in the vicinity of the sector boundary. The observing were separated by a longitudinal distance comparable to the typical radial extent magnetic clouds at 1 AU (fraction of an AU), and, indeed, clear differences were in the records from these spacecraft. Two partial-halo coronal mass ejections (CMEs) launched from the same active region less than a day apart, the first on 19 May and second on 20 May 2007. The clear signatures of the magnetic cloud associated with the CME were observed by STEREO B and Wind while only STEREO A recorded clear of the magnetic cloud associated with the latter CME. Both magnetic clouds to have interacted strongly with the ambient solar wind and the data showed evidence they were a part of the coronal streamer belt. Wind and STEREO B also recorded a disturbance propagating inside a magnetic cloud that compressed the field and at the cloud's trailing portion. The results illustrate how distant multi-satellite can reveal the complex structure of the extension of the coronal streamer into space even during the solar activity minimum.
C1 [Kilpua, E. K. J.] Univ Helsinki, Dept Phys Sci, Div Theoret Phys, Helsinki, Finland.
[Kilpua, E. K. J.; Luhmann, J. G.; Li, Y.; Liu, Y.; Lynch, B. J.; Larson, D.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Liewer, P. C.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Farrugia, C.; Galvin, A. B.] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.
[Moestl, C.] Graz Univ, Inst Phys, A-8010 Graz, Austria.
[Moestl, C.] Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria.
[Russell, C. T.] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA.
[Vourlidas, A.] USN, Solar Phys Branch, Res Lab, Washington, DC 20375 USA.
[Acuna, M. H.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Sauvaud, J. A.] CESR CNRS, F-31028 Toulouse, France.
RP Kilpua, EKJ (reprint author), Univ Helsinki, Dept Phys Sci, Div Theoret Phys, Helsinki, Finland.
EM emilia.kilpua@helsinki.fi
RI Vourlidas, Angelos/C-8231-2009; Russell, Christopher/E-7745-2012;
Kilpua, Emilia/G-8994-2012; Galvin, Antoinette/A-6114-2013; Lynch,
Benjamin/B-1300-2013;
OI Vourlidas, Angelos/0000-0002-8164-5948; Russell,
Christopher/0000-0003-1639-8298; Lynch, Benjamin/0000-0001-6886-855X;
Liu, Ying/0000-0002-3483-5909; Moestl, Christian/0000-0001-6868-4152
NR 38
TC 44
Z9 44
U1 0
U2 3
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-0938
J9 SOL PHYS
JI Sol. Phys.
PD FEB
PY 2009
VL 254
IS 2
BP 325
EP 344
DI 10.1007/s11207-008-9300-y
PG 20
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 413LG
UT WOS:000263794000008
ER
PT J
AU Eyles, CJ
Harrison, RA
Davis, CJ
Waltham, NR
Shaughnessy, BM
Mapson-Menard, HCA
Bewsher, D
Crothers, SR
Davies, JA
Simnett, GM
Howard, RA
Moses, JD
Newmark, JS
Socker, DG
Halain, JP
Defise, JM
Mazy, E
Rochus, P
AF Eyles, C. J.
Harrison, R. A.
Davis, C. J.
Waltham, N. R.
Shaughnessy, B. M.
Mapson-Menard, H. C. A.
Bewsher, D.
Crothers, S. R.
Davies, J. A.
Simnett, G. M.
Howard, R. A.
Moses, J. D.
Newmark, J. S.
Socker, D. G.
Halain, J. -P.
Defise, J. -M.
Mazy, E.
Rochus, P.
TI The Heliospheric Imagers Onboard the STEREO Mission
SO SOLAR PHYSICS
LA English
DT Article
ID INVESTIGATION SECCHI; EARTH; COMET; TAIL; SMEI
AB Mounted on the sides of two widely separated spacecraft, the two Heliospheric Imager (HI) instruments onboard NASA's STEREO mission view, for the first time, the space between the Sun and Earth. These instruments are wide-angle visible-light imagers that incorporate sufficient baffling to eliminate scattered light to the extent that the passage of solar coronal mass ejections (CMEs) through the heliosphere can be detected. Each HI instrument comprises two cameras, HI-1 and HI-2, which have 20 degrees and 70 degrees fields of view and are off-pointed from the Sun direction by 14.0 degrees and 53.7 degrees, respectively, with their optical axes aligned in the ecliptic plane. This arrangement provides coverage over solar elongation angles from 4.0 degrees to 88.7 degrees at the viewpoints of the two spacecraft, thereby allowing the observation of Earth-directed CMEs along the Sun-Earth line to the vicinity of the Earth and beyond. Given the two separated platforms, this also presents the first opportunity to view the structure and evolution of CMEs in three dimensions. The STEREO spacecraft were launched from Cape Canaveral Air Force Base in late October 2006, and the HI instruments have been performing scientific observations since early 2007. The design, development, manufacture, and calibration of these unique instruments are reviewed in this paper. Mission operations, including the initial commissioning phase and the science operations phase, are described. Data processing and analysis procedures are briefly discussed, and ground-test results and in-orbit observations are used to demonstrate that the performance of the instruments meets the original scientific requirements.
C1 [Eyles, C. J.; Harrison, R. A.; Davis, C. J.; Waltham, N. R.; Shaughnessy, B. M.; Mapson-Menard, H. C. A.; Bewsher, D.; Crothers, S. R.; Davies, J. A.] Rutherford Appleton Lab, STFC, Space Sci & Technol Dept, Didcot OX11 0QX, Oxon, England.
[Eyles, C. J.; Simnett, G. M.] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England.
[Howard, R. A.; Moses, J. D.; Newmark, J. S.; Socker, D. G.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Halain, J. -P.; Defise, J. -M.; Mazy, E.; Rochus, P.] Univ Liege, Ctr Spatial Liege, B-4031 Angleur, Belgium.
[Eyles, C. J.] Univ Valencia, Lab Proc Imagenes, Valencia 46071, Spain.
RP Eyles, CJ (reprint author), Rutherford Appleton Lab, STFC, Space Sci & Technol Dept, Didcot OX11 0QX, Oxon, England.
EM cje@star.sr.bham.ac.uk
RI Scott, Christopher/H-8664-2012;
OI Scott, Christopher/0000-0001-6411-5649; Bewsher,
Danielle/0000-0002-6351-5170
FU University of Birmingham; Rutherford Appleton Laboratory; UK, the Centre
Spatial de Liege (CSL), Belgium; U. S. Naval Research Laboratory (NRL);
Washington DC, USA; STEREO/SECCHI; Naval Research Laboratory ( USA);
Lockheed Martin Solar and Astrophysics Lab (USA); NASA Goddard Space
Flight Center (USA); Rutherford Appleton Laboratory ( UK); University of
Birmingham ( UK); Max-Planck-Institut fur Sonnensystemforschung (
Germany); Centre Spatial de Liege ( Belgium),; Institut d'Optique
Theorique et Appliquee ( France); Institut d'Astrophysique Spatiale (
France); NASA; UK institutions by Physics and Astronomy Research Council
(PPARC; now the Science and Technology Facilities Council); Belgian
Federal Science Policy Office; French institutions by Centre National
d'Etudes Spatiales (CNES); Centre National de la Recherche Scientifique
(CNRS); USAF Space Test Program; Office of Naval Research; STEREO
Program Office and others at NASA/GSFC
FX The Heliospheric Imager instrument was developed by a collaboration that
included the University of Birmingham and the Rutherford Appleton
Laboratory, both in the UK, the Centre Spatial de Liege (CSL), Belgium,
and the U. S. Naval Research Laboratory (NRL), Washington DC, USA. The
STEREO/SECCHI project is an international consortium of the Naval
Research Laboratory ( USA), Lockheed Martin Solar and Astrophysics Lab
(USA), NASA Goddard Space Flight Center ( USA), Rutherford Appleton
Laboratory ( UK), University of Birmingham ( UK), Max-Planck-Institut
fur Sonnensystemforschung ( Germany), Centre Spatial de Liege (
Belgium), Institut d'Optique Theorique et Appliquee ( France), and
Institut d'Astrophysique Spatiale ( France). The USA institutions were
funded by NASA; the UK institutions by Physics and Astronomy Research
Council (PPARC; now the Science and Technology Facilities Council); the
German institutions by Deutsche Zentrum fur Luft- und Raumfahrt e. V.
(DLR); the Belgian institutions by Belgian Federal Science Policy
Office; and the French institutions by Centre National d'Etudes
Spatiales (CNES) and the Centre National de la Recherche Scientifique
(CNRS). The NRL effort was also supported by the USAF Space Test Program
and the Office of Naval Research. The authors also wish to acknowledge
the strong support of the STEREO Program Office and others at NASA/GSFC
throughout the project and particularly during the later stages of
instrument development and during spacecraft AIT.
NR 28
TC 167
Z9 169
U1 0
U2 3
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-0938
EI 1573-093X
J9 SOL PHYS
JI Sol. Phys.
PD FEB
PY 2009
VL 254
IS 2
BP 387
EP 445
DI 10.1007/s11207-008-9299-0
PG 59
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 413LG
UT WOS:000263794000012
ER
PT J
AU Johnson, KJ
Minor, CP
Guthrie, VN
Rose-Pehrsson, SL
AF Johnson, Kevin J.
Minor, Christian P.
Guthrie, Verner N.
Rose-Pehrsson, Susan L.
TI Intelligent data fusion for wide-area assessment of UXO contamination
SO STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT
LA English
DT Article
DE Wide-area; UXO; Data fusion; Feature selection
ID PARTIALLY SUPERVISED CLASSIFICATION; UNEXPLODED ORDNANCE; LAND-COVER;
MAGNETOMETRY; IMAGES
AB The remediation of sites contaminated with unexploded ordnance (UXO) remains an area of intense focus for the Department of Defense. Under the sponsorship of SERDP, data fusion techniques are being developed for use in enhancing wide-area assessment UXO remediation efforts and a data fusion framework is being created to provide a cohesive data management and decision-making utility to allow for more efficient expenditure of time, labor and resources. An important first step in this work is the development of feature extraction utilities and feature probability density maps for eventual input to data fusion algorithms, making data fusion of estimates of data quality, UXO-related features, non-UXO backgrounds, and correlations among independent data streams possible. Utilizing data acquired during ESTCP's Wide-Area Assessment Pilot Program, the results presented here successfully demonstrate the feasibility of automated feature extraction from light detection and ranging, orthophotography, and helicopter magnetometry wide-area assessment survey data acquired at the Pueblo Precision Bombing Range #2. These data were imported and registered to a common survey map grid and UXO-related features were extracted and utilized to construct survey site-wide probability density maps that are well-suited for input to higher level data fusion algorithms. Preliminary combination of feature maps from the various data sources yielded maps for the Pueblo site that offered a more accurate UXO assessment than any one data source alone.
C1 [Johnson, Kevin J.; Rose-Pehrsson, Susan L.] USN, Res Lab, Washington, DC 20375 USA.
[Minor, Christian P.] Nova Res Inc, Alexandria, VA 22308 USA.
[Guthrie, Verner N.] USA, Topog Engn Ctr, Alexandria, VA 22315 USA.
RP Rose-Pehrsson, SL (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM susan.rosepehrsson@nrl.navy.mil
FU Strategic Environmental Research and Development Program (SERDP)
[MM-1510]
FX This work is funded by the Strategic Environmental Research and
Development Program (SERDP) under Project MM-1510. The researchers would
like to thank Dr Anne Andrews and Dr Herb Nelson for their invaluable
expertise with survey data, and the survey teams that participated in
ESTCP Wide-Area Assessment Pilot Program, without which there would be
no data for data fusion efforts.
NR 35
TC 6
Z9 6
U1 0
U2 4
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1436-3240
J9 STOCH ENV RES RISK A
JI Stoch. Environ. Res. Risk Assess.
PD FEB
PY 2009
VL 23
IS 2
BP 237
EP 252
DI 10.1007/s00477-007-0204-4
PG 16
WC Engineering, Environmental; Engineering, Civil; Environmental Sciences;
Statistics & Probability; Water Resources
SC Engineering; Environmental Sciences & Ecology; Mathematics; Water
Resources
GA 392QH
UT WOS:000262316800009
ER
PT J
AU Hsu, ML
Rajesh, PK
Liu, JY
Tsai, LC
Tsai, HF
Lin, CH
Dymond, KF
Coker, C
Chua, DH
Budzien, SA
Cheng, CZ
AF Hsu, Mei-Lan
Rajesh, Panthalingal Krishnanunni
Liu, Jann-Yenq
Tsai, Lung-Chih
Tsai, Ho-Fang
Lin, Chien-Hung
Dymond, Kenneth F.
Coker, Clayton
Chua, Damien H.
Budzien, Scott A.
Cheng, Chio-Zong
TI Ionospheric Electron Density Concurrently Derived by TIP and GOX of
FORMOSAT-3/COSMIC
SO TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
LA English
DT Article; Proceedings Paper
CT 6th FORMOSAT-3/COSMIC Mission Early Results Workshop
CY APR 15, 2006
CL Vandenberg, CA
DE Tiny ionospheric photometer (TIP); GPS occultation experiment (GOX);
FORMOSAT-3/COSMIC (F3/C); LEO tomography; LEO-TIP tomographic inversion;
Ionospheric electron density
ID GPS/MET EXPERIMENT; OCCULTATION DATA; IRI MODEL; ATMOSPHERE; TOMOGRAPHY;
VALIDATION; SYSTEM; OXYGEN
AB The tiny ionospheric photometer (TIP) and GPS occultation experiment (GOX) onboard FORMOSAT-3/COSMIC (F3/C) are employed to measure the OI 135.6 ran intensities in the nadir direction and the total electron content (TEC) between the F3/C and GPS satellite in the ionosphere, respectively. Due to its very high sensitivity similar to 600 counts/Rayleigh and rather narrow nadir pointing 3.8 degrees circular field-of-view, the TIP provides accurate characterization of ionospheric electron density gradients in the horizontal direction. Meanwhile, a technique of the low earth orbit (LEO) tomography is applied to analyze the GOX data obtaining the 3D distribution of ionosphere electron density. Here, we combine the two observations to carry out the LEO-TIP tomographic inversions, and demonstrate that the peak electron density (NmF(2)) retrieved from the TIP combined together with the peak altitude (hmF(2)) information from the LEO tomography profiles provides more realistic electron density.
C1 [Hsu, Mei-Lan; Rajesh, Panthalingal Krishnanunni; Liu, Jann-Yenq; Tsai, Lung-Chih] Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan.
[Liu, Jann-Yenq; Tsai, Lung-Chih] Natl Cent Univ, Ctr Space & Remote Sensing Res, Chungli 32054, Taiwan.
[Tsai, Ho-Fang] Ctr Weather Bur, Taipei, Taiwan.
[Lin, Chien-Hung; Cheng, Chio-Zong] Natl Cheng Kung Univ, Plasma & Space Sci Ctr, Tainan 70101, Taiwan.
[Dymond, Kenneth F.; Coker, Clayton; Chua, Damien H.; Budzien, Scott A.] USN, Res Lab, EO Hulburt Ctr Space Res, Washington, DC 20375 USA.
RP Liu, JY (reprint author), Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan.
EM jyliu@jupiter.ss.ncu.edu.tw
RI 魏, 孝慈/D-1493-2012; Cheng, Chio/K-1005-2014; Liu, Jann-Yenq/Q-1668-2015;
OI Lin, Charles C. H./0000-0001-8955-8753
NR 29
TC 3
Z9 3
U1 0
U2 6
PU CHINESE GEOSCIENCE UNION
PI TAIPEI
PA PO BOX 23-59, TAIPEI 10764, TAIWAN
SN 1017-0839
J9 TERR ATMOS OCEAN SCI
JI Terr. Atmos. Ocean. Sci.
PD FEB
PY 2009
VL 20
IS 1
BP 207
EP 214
DI 10.3319/TAO.2008.04.24.02(F3C)
PG 8
WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences;
Oceanography
SC Geology; Meteorology & Atmospheric Sciences; Oceanography
GA 434GV
UT WOS:000265264100016
ER
PT J
AU Dymond, KF
Budzien, SA
Chua, DH
Coker, C
Liu, JY
AF Dymond, Kenneth F.
Budzien, Scott A.
Chua, Damien H.
Coker, Clayton
Liu, Jann-Yenq
TI Tomographic Reconstruction of the Low-Latitude Nighttime Electron
Density Using FORMOSAT-3/COMSIC Radio Occultation and UV Photometer Data
SO TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
LA English
DT Article; Proceedings Paper
CT 6th FORMOSAT-3/COSMIC Mission Early Results Workshop
CY APR 15, 2006
CL Vandenberg, CA
DE Ionosphere; Tomography; FORMOSAT-3/COSMIC; Appelton anomaly
ID HOPKINS ULTRAVIOLET TELESCOPE; NIGHTGLOW; OXYGEN; AIRGLOW; EMISSIONS
AB The Constellation Observing System for Meteorology, Ionosphere, and Climate (FORMOSAT-3/COSMIC) is a constellation of six microsatellites that was launched into low-Earth orbit on 14 April 2006. Each FORMOSAT-3/COSMIC satellite contains a GPS Occultation Experiment (GOX) GPS receiver and a Tiny Ionospheric Photometer (TIP), which measure the ionosphere. In previous papers of Dymond and Thomas (2001) and Dymond et al. (2000), an algorithm for tomographically inverting GPS occultation and UV radiometer measurements has been presented. We apply this algorithm to the inversion of recently acquired FORMOSAT-3/COSMIC data and present the results.
C1 [Dymond, Kenneth F.; Budzien, Scott A.; Chua, Damien H.; Coker, Clayton] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Liu, Jann-Yenq] Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan.
RP Dymond, KF (reprint author), USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
EM Kenneth.dymond@nrl.navy.mil
RI 魏, 孝慈/D-1493-2012; Liu, Jann-Yenq/Q-1668-2015;
OI Dymond, Kenneth/0000-0001-8060-9016
NR 27
TC 10
Z9 10
U1 0
U2 6
PU CHINESE GEOSCIENCE UNION
PI TAIPEI
PA PO BOX 23-59, TAIPEI 10764, TAIWAN
SN 1017-0839
J9 TERR ATMOS OCEAN SCI
JI Terr. Atmos. Ocean. Sci.
PD FEB
PY 2009
VL 20
IS 1
BP 215
EP 226
DI 10.3319/TAO.2008.01.15.01(F3C)
PG 12
WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences;
Oceanography
SC Geology; Meteorology & Atmospheric Sciences; Oceanography
GA 434GV
UT WOS:000265264100017
ER
PT J
AU Coker, C
Dymond, KF
Budzien, SA
Chua, DH
Liu, JY
Anderson, DN
Basu, S
Pedersen, TR
AF Coker, Clayton
Dymond, Kenneth F.
Budzien, Scott A.
Chua, Damien H.
Liu, Jann-Yenq
Anderson, David N.
Basu, Sunanda
Pedersen, Todd R.
TI Observations of the Ionosphere Using the Tiny Ionospheric Photometer
SO TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
LA English
DT Article; Proceedings Paper
CT 6th FORMOSAT-3/COSMIC Mission Early Results Workshop
CY APR 15, 2006
CL Vandenberg, CA
DE Far ultraviolet; Ionosphere; Equatorial anomaly; Irregularities
ID ELECTRON-DENSITY
AB The Tiny Ionospheric Photometer (TIP) on the Constellation Observing System for Meteorology, Ionosphere, and Climate (FORMOSAT-3/COSMIC) characterizes the nighttime ionosphere using 135.6-nm radiative recombination emission. TIP measures horizontal structure of the ionosphere with high precision and high spatial resolution. Latitudinal, longitudinal, and temporal distribution of the nighttime ionosphere is specified. We present a review of ionospheric observations made with TIP during the first five months of operation. Comparisons are made with other ionospheric sensors in order to validate the TIP observations and to demonstrate TIP resolution and sensitivity performance. Equatorial anomalies observed by TIP are compared with estimates of the E x B vertical drift during the post-sunset pre-reversal enhancement in the Peruvian sector. Low latitude irregularity structures observed by TIP are compared with measurements from ground-based sensors including: imaging photometers, ionosonde, and UHF scintillation receivers. Detailed measurements of low latitude density depletion depth and width are provided. Global ionospheric morphology observed by TIP is compared with similar observations by COSMIC radio occultation, and the GAIM model. The complexity of the underlying neutral winds is revealed by the TIP ionospheric morphology.
C1 [Coker, Clayton; Dymond, Kenneth F.; Budzien, Scott A.; Chua, Damien H.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Liu, Jann-Yenq] Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan.
[Anderson, David N.] Univ Colorado, NOAA, Cooperat Inst Res Environm Sci, Space Weather Predict Ctr, Boulder, CO 80309 USA.
[Basu, Sunanda] Boston Univ, Ctr Space Phys, Boston, MA 02215 USA.
[Pedersen, Todd R.] USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA USA.
RP Coker, C (reprint author), USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
EM clayton.coker@nrl.navy.mil
RI 魏, 孝慈/D-1493-2012; Liu, Jann-Yenq/Q-1668-2015;
OI Pedersen, Todd/0000-0002-6940-0112
NR 17
TC 9
Z9 9
U1 2
U2 4
PU CHINESE GEOSCIENCE UNION
PI TAIPEI
PA PO BOX 23-59, TAIPEI 10764, TAIWAN
SN 1017-0839
J9 TERR ATMOS OCEAN SCI
JI Terr. Atmos. Ocean. Sci.
PD FEB
PY 2009
VL 20
IS 1
BP 227
EP 235
DI 10.3319/TAO.2008.01.18.02(F3C)
PG 9
WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences;
Oceanography
SC Geology; Meteorology & Atmospheric Sciences; Oceanography
GA 434GV
UT WOS:000265264100018
ER
PT J
AU Chua, DH
Dymond, KF
Budzien, SA
Coker, C
Liu, JY
AF Chua, Damien H.
Dymond, Kenneth F.
Budzien, Scott A.
Coker, Clayton
Liu, Jann-Yenq
TI Horizontal Ionospheric Electron Density Gradients Observed by
FORMOSAT-3/COSMIC TIP: Spatial Distributions and Effects on VLF Wave
Propagation at Mid-Latitudes
SO TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
LA English
DT Article; Proceedings Paper
CT 6th FORMOSAT-3/COSMIC Mission Early Results Workshop
CY APR 15, 2006
CL Vandenberg, CA
DE Equatorial ionosphere; VLF wave propagation; Remote sensing
ID SCINTILLATIONS; PHOTOMETER; INSTRUMENT; REGION; MIDDLE
AB We investigate the spatial variability of electron densities in the nightside ionosphere and its effects on very-low frequency (VLF) wave propagation using a suite of instruments from the FORMOSAT-3/Constellation Observing System for Meteorology Ionosphere and Climate (COSMIC) spacecraft. We use observations from the Tiny Ionospheric Photometer (TIP) instruments to infer the horizontal electron density gradients along each satellite track. We demonstrate that the 01 1356 A radiance measured by the TIP instruments tracks the horizontal electron density structure well with high spatial resolution and unprecedented sensitivity. Accurate measurements of the horizontal electron density gradients are important for improving retrieved electron density profiles from GPS occultation and other tomographic remote sensing techniques. The processes underlying the variability in the large-scale, nightside electron density gradients are the main drivers of ionospheric weather. TIP observations reveal significant variability in both the small and large scale structure of the nightside ionosphere. The relative intensities, relative widths, and latitudinal separation of the northern and southern ionization crests of the Appleton anomalies show a high degree of longitudinal variation. We demonstrate how the TIP observations can be used to measure the horizontal gradient of the refractive index of whistler-mode VLF waves propagating in a cold, collisionless plasma. These measurements are critical for understanding how gradients in electron density associated with ionospheric structure such as depletions and the Appleton anomalies affect VLF wave propagation through the equatorial and mid-latitude ionosphere.
C1 [Chua, Damien H.; Dymond, Kenneth F.; Budzien, Scott A.; Coker, Clayton] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Liu, Jann-Yenq] Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan.
RP Chua, DH (reprint author), USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
EM damien.chua@nrl.navy.mil
RI 魏, 孝慈/D-1493-2012; Liu, Jann-Yenq/Q-1668-2015
NR 25
TC 2
Z9 2
U1 0
U2 5
PU CHINESE GEOSCIENCE UNION
PI TAIPEI
PA PO BOX 23-59, TAIPEI 10764, TAIWAN
SN 1017-0839
J9 TERR ATMOS OCEAN SCI
JI Terr. Atmos. Ocean. Sci.
PD FEB
PY 2009
VL 20
IS 1
BP 251
EP 259
DI 10.3319/TAO.2008.01.16.01(F3C)
PG 9
WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences;
Oceanography
SC Geology; Meteorology & Atmospheric Sciences; Oceanography
GA 434GV
UT WOS:000265264100020
ER
PT J
AU Reboulet, J
Cunningham, R
Gunasekar, PG
Chapman, GD
Stevens, SC
AF Reboulet, James
Cunningham, Robert
Gunasekar, Palur G.
Chapman, Gail D.
Stevens, Sean C.
TI Loop System for Creating Jet Fuel Vapor Standards Used in the
Calibration of Infrared Spectrophotometers and Gas Chromatographs
SO TOXICOLOGY MECHANISMS AND METHODS
LA English
DT Article
DE Chromatography; Complex mixtures; Head space analysis; Infrared
spectrophotometry; Inhalation; Jet fuel
ID EXPOSURE
AB A whole body inhalation study of mixed let fuel vapor and its aerosol necessitated the development of a method for preparing vapor only standards from the neat fuel. Jet fuel is a complex mixture of components which partitions between aerosol and vapor when aspirated based on relative volatility of the individual compounds. A method was desired which could separate the vapor portion from the aerosol component to prepare standards for the calibration of infrared spectrophotometers and a head space gas chromatography system. A re-circulating loop system was developed which provided vapor only standards whose composition matched those seen in an exposure system. Comparisons of nominal concentrations in the exposure system to those determined by infrared spectrophotometry were in 92-95% agreement. Comparison of jet fuel vapor concentrations determined by infrared spectrophotometry compared to head space gas chromatography yielded a 93% overall agreement in trial runs. These levels of agreement show the loop system to be a viable method for creating jet fuel vapor standards for calibrating instruments.
C1 [Chapman, Gail D.] USN, Hlth Res Ctr, Naval Hlth Res Lab, Detachment Environm Hlth Effects Lab, Wright Patterson AFB, OH 45433 USA.
[Stevens, Sean C.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Reboulet, James] USN, Hlth Res Lab, Detachment Environm Hlth Effects Lab, SAIC Inc, Wright Patterson AFB, OH 45433 USA.
RP Chapman, GD (reprint author), USN, Hlth Res Ctr, Naval Hlth Res Lab, Detachment Environm Hlth Effects Lab, Bldg 837,Area B,2729 R St, Wright Patterson AFB, OH 45433 USA.
EM gail.chapman@wpafb.af.mil
FU Defense Health Programs (DHP) [60768]
FX This work was supported by Defense Health Programs (DHP) reimbursable
Work Unit # 60768. The views expressed in this article are those of the
authors and do not reflect the official policy or position of the
Department of the Navy; Department of Defense, or the U.S. Government.
This article is approved for public release, distribution unlimited.
NR 13
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 1537-6524
J9 TOXICOL MECH METHOD
JI Toxicol. Mech. Methods
PD FEB
PY 2009
VL 19
IS 2
BP 123
EP 128
DI 10.1080/15376510802305054
PG 6
WC Toxicology
SC Toxicology
GA 453SE
UT WOS:000266630900007
PM 19778256
ER
PT J
AU Liu, M
Nachamkin, JE
Westphal, DL
AF Liu, Ming
Nachamkin, Jason E.
Westphal, Douglas L.
TI On the Improvement of COAMPS Weather Forecasts Using an Advanced
Radiative Transfer Model
SO WEATHER AND FORECASTING
LA English
DT Article
ID GENERAL-CIRCULATION MODEL; CLIMATE MODELS; ACCURATE PARAMETERIZATION;
CIRRUS CLOUDS; EFFECTIVE RADIUS; MESOSCALE; FEEDBACK; MICROPHYSICS;
VERIFICATION; ABSORPTION
AB Fu-Liou's delta-four-stream (with a two-stream option) radiative transfer model has been implemented in the U.S. Navy's Coupled Ocean-Atmosphere Mesoscale Prediction System (COAMPS) 1 to calculate solar and thermal infrared fluxes in 6 shortwave and 12 longwave bands. The model performance is evaluated at high resolution for clear-sky and overcast conditions against the observations from the Southern Great Plains of the Atmospheric Radiation Measurement Program. In both cases, use of the Fu-Liou model provides significant improvement over the operational implementation of the standard Harshvardhan radiation parameterization in both shortwave and longwave fluxes. A sensitivity study of radiative flux on clouds reveals that the choices of cloud effective radius schemes for ice and liquid water are critical to the flux calculation due to the effects on cloud optical properties. The sensitivity study guides the selection of optimal cloud optical properties for use in the Fu-Liou parameterization as implemented in COAMPS. The new model is then used to produce 3-day forecasts over the continental United States for a winter and a summer month. The verifications of parallel runs using the standard and new parameterizations show that Fu-Liou dramatically reduces the model's systematic warm bias in the upper troposphere in both winter and summer. The resultant cooling modifies the atmospheric stability and moisture transport, resulting in a significant reduction in the upper-tropospheric wet bias. Overall ice and liquid water paths are also reduced. At the surface, Fu-Liou reduces the negative temperature and sea level pressure biases by providing more accurate radiative heating rates to the land surface model. The error reductions increase with forecast length as the impact of improved radiative fluxes accumulates over time. A combination of the two- and four-stream options results in major computational efficiency gains with minimal loss in accuracy.
C1 [Liu, Ming; Nachamkin, Jason E.; Westphal, Douglas L.] Naval Res Lab, Monterey, CA 94943 USA.
RP Liu, M (reprint author), Naval Res Lab, 7 Grace Hopper Ave,Stop 2, Monterey, CA 94943 USA.
EM ming.liu@nrlmry.navy.mil
FU Office of Naval Research and the Naval Research Laboratory [PE-061153N,
PE-0602435N]
FX We sincerely thank Dr. Allen Zhao and Dr. Hao Jin for inspirational
discussions on radiation modeling and help in the data analysis. We are
also thankful for the support from Principal Investigators Dr. Shouping
Wang and Dr. Jerome Schmidt. The support of the Office of Naval Research
and the Naval Research Laboratory through programs PE-061153N and
PE-0602435N is gratefully acknowledged.
NR 39
TC 9
Z9 10
U1 0
U2 2
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0882-8156
J9 WEATHER FORECAST
JI Weather Forecast.
PD FEB
PY 2009
VL 24
IS 1
BP 286
EP 306
DI 10.1175/2008WAF2222137.1
PG 21
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 429SJ
UT WOS:000264940100017
ER
PT J
AU Doty, MF
Climente, JI
Korkusinski, M
Scheibner, M
Bracker, AS
Hawrylak, P
Gammon, D
AF Doty, M. F.
Climente, J. I.
Korkusinski, M.
Scheibner, M.
Bracker, A. S.
Hawrylak, P.
Gammon, D.
TI Antibonding Ground States in InAs Quantum-Dot Molecules
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID EXCITONS
AB Coherent tunneling between two InAs quantum dots forms delocalized molecular states. Using magnetophotoluminescence spectroscopy we show that when holes tunnel through a thin barrier, the lowest energy molecular state has bonding orbital character. However, as the thickness of the barrier increases, the molecular ground state changes character from a bonding orbital to an antibonding orbital, confirming recent theoretical predictions. We explain how the spin-orbit interaction causes this counterintuitive reversal by using a four-band k center dot p model and atomistic calculations that account for strain.
C1 [Doty, M. F.; Scheibner, M.; Bracker, A. S.; Gammon, D.] USN, Res Lab, Washington, DC 20375 USA.
[Climente, J. I.] CNR, INFM, Natl Ctr NanoStruct & BioSyst Surfaces, I-41100 Modena, Italy.
[Korkusinski, M.; Hawrylak, P.] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada.
RP Doty, MF (reprint author), Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19711 USA.
EM doty@udel.edu
RI Doty, Matthew/B-5075-2010; Climente, Juan/K-1699-2014
OI Doty, Matthew/0000-0001-7999-3567; Climente, Juan/0000-0001-6984-6424
FU NSA/ARO; ONR; CIAR; QuantumWorks; FIRB-MIUR Italy-Canada [RBIN06JB4C,
MEIF-CT-2006-023797]; Institute for Microstructural Sciences
FX We acknowledge support from NSA/ARO, ONR, CIAR, QuantumWorks, FIRB-MIUR
Italy-Canada RBIN06JB4C, MEIF-CT-2006-023797 (J. I. C.), and Institute
for Microstructural Sciences ( J. I. C.).
NR 17
TC 66
Z9 67
U1 0
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JAN 30
PY 2009
VL 102
IS 4
AR 047401
DI 10.1103/PhysRevLett.102.047401
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 401YC
UT WOS:000262978600070
PM 19257474
ER
PT J
AU Shen, CY
Evans, TE
Oba, RM
Finette, S
AF Shen, Colin Y.
Evans, Thomas E.
Oba, Roger M.
Finette, Steven
TI Three-dimensional hindcast simulation of internal soliton propagation in
the Asian Seas International Acoustics Experiment area
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID SOUTH CHINA SEA; WAVES; SLOPE
AB Internal solitary waves referred to as solitons are common occurrences in the South China Sea. The Asian Seas International Acoustics Experiment (ASIAEX) experiment was carried out in April-May 2001 to perform measurements on these solitons, which are often highly energetic, having isopycnal displacements well over 100 m and phase speeds greater than 2.5 m/s. Of particular interest is the interaction of a soliton with the sloping shelf bottom that occurs as the soliton shoals to water depths less than its wave height. Observations during the experiment show that at such shallow depths, a soliton undergoes strong refraction and transformation. In this article, we present hindcast simulation of a particular soliton observed during the experiment, using a fully nonlinear, nonhydrostatic, three-dimensional model and the actual bathymetry from the ASIAEX area. The computation begins with the soliton at a distance about 100 km from the shelf and obtains the propagation and evolution of the soliton over the shelf-slope. The three-dimensional hindcast is able to reproduce the refraction of the soliton propagation observed during the experiment as well as the propagation speed and direction in the range observed. The final nonlinear transformation of the soliton from symmetrical to skewed elongated waveform is also obtained in the model consistent with the observations. The hindcast simulation reveals that the relative position of soliton's vorticity core to the local water depth is a crucial indicator of the onset of transformation and formation of elevation waves.
C1 [Shen, Colin Y.; Evans, Thomas E.] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
[Oba, Roger M.; Finette, Steven] USN, Res Lab, Acoust Div, Washington, DC 20375 USA.
RP Shen, CY (reprint author), USN, Res Lab, Remote Sensing Div, Code 7230,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM shen@nrl.navy.mil
FU Office of Naval Research; DoD HPC Shared Resource Center, NAVO
FX This work is a contribution to the project, Integrated
Submesoscale/Acoustic Modeling Predictive Capability for Littoral
Regions, at the Naval Research Laboratory, sponsored by the Office of
Naval Research, and is supported in part by a grant of HPC time from the
DoD HPC Shared Resource Center, NAVO.
NR 11
TC 4
Z9 5
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-OCEANS
JI J. Geophys. Res.-Oceans
PD JAN 29
PY 2009
VL 114
AR C01014
DI 10.1029/2008JC004937
PG 15
WC Oceanography
SC Oceanography
GA 401ZL
UT WOS:000262983000003
ER
PT J
AU Emmert, JT
Lean, JL
Picone, JM
AF Emmert, J. T.
Lean, J. L.
Picone, J. M.
TI Comment on "Oscillations of global mean TEC'' by K. Hocke
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID MGII INDEX; SOLAR EUV; IRRADIANCE
C1 [Emmert, J. T.; Lean, J. L.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Picone, J. M.] George Mason Univ, Dept Phys & Astron, Fairfax, VA 22030 USA.
RP Emmert, JT (reprint author), USN, Res Lab, Div Space Sci, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM john.emmert@nrl.navy.mil
OI Lean, Judith/0000-0002-0087-9639
NR 9
TC 3
Z9 3
U1 0
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 JAN 29
PY 2009
VL 114
AR A01309
DI 10.1029/2008JA013679
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 401ZW
UT WOS:000262984200009
ER
PT J
AU Stahlbush, RE
VanMil, BL
Myers-Ward, RL
Lew, KK
Gaskill, DK
Eddy, CR
AF Stahlbush, R. E.
VanMil, B. L.
Myers-Ward, R. L.
Lew, K-K.
Gaskill, D. K.
Eddy, C. R., Jr.
TI Basal plane dislocation reduction in 4H-SiC epitaxy by growth
interruptions
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE edge dislocations; epitaxial growth; photoluminescence; semiconductor
epitaxial layers; semiconductor growth; silicon compounds; wide band gap
semiconductors
ID DIODES
AB The paths of basal plane dislocations (BPDs) through 4H-SiC epitaxial layers grown on wafers with an 8 degrees offcut were tracked using ultraviolet photoluminescence imaging. The reduction of BPDs by conversion to threading edge dislocations was investigated at ex situ and in situ growth interrupts. For ex situ interrupts, BPDs are imaged after each of several growths. The wafer remains in the reactor for in situ interrupts and BPDs are imaged after the growth is finished. For in situ interrupts, a combination of temperature, propane flow, and duration has been determined, which achieve a BPD reduction of 98%.
C1 [Stahlbush, R. E.; VanMil, B. L.; Myers-Ward, R. L.; Lew, K-K.; Gaskill, D. K.; Eddy, C. R., Jr.] USN, Res Lab, Washington, DC 20375 USA.
RP Eddy, CR (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM stahlbush@nrl.navy.mil
FU ASEE-NRL Postdoctoral Fellowships
FX B. L. V, R. L. M. W, and K. K. L. were supported by ASEE-NRL
Postdoctoral Fellowships.
NR 17
TC 34
Z9 35
U1 2
U2 15
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 26
PY 2009
VL 94
IS 4
AR 041916
DI 10.1063/1.3070530
PG 3
WC Physics, Applied
SC Physics
GA 401VY
UT WOS:000262971800042
ER
PT J
AU Furukawa, Y
Watkins, JL
Kim, J
Curry, KJ
Bennett, RH
AF Furukawa, Yoko
Watkins, Janet L.
Kim, Jinwook
Curry, Kenneth J.
Bennett, Richard H.
TI Aggregation of montmorillonite and organic matter in aqueous media
containing artificial seawater
SO GEOCHEMICAL TRANSACTIONS
LA English
DT Article
ID DYNAMIC LIGHT-SCATTERING; CALIFORNIA CONTINENTAL BORDERLAND; HUMIC
SUBSTANCES; PARTICLE-SIZE; SODIUM-MONTMORILLONITE; COLLOID STABILITY;
SUSPENDED-MATTER; SURFACE-CHARGE; RIVER ESTUARY; FRESH-WATER
AB Background: The dispersion-aggregation behaviors of suspended colloids in rivers and estuaries are affected by the compositions of suspended materials (i.e., clay minerals vs. organic macromolecules) and salinity. Laboratory experiments were conducted to investigate the dispersion and aggregation mechanisms of suspended particles under simulated river and estuarine conditions. The average hydrodynamic diameters of suspended particles (representing degree of aggregation) and zeta potential (representing the electrokinetic properties of suspended colloids and aggregates) were determined for systems containing suspended montmorillonite, humic acid, and/or chitin at the circumneutral pH over a range of salinity (0-7.2 psu).
Results: The montmorillonite-only system increased the degree of aggregation with salinity increase, as would be expected for suspended colloids whose dispersion-aggregation behavior is largely controlled by the surface electrostatic properties and van der Waals forces. When montmorillonite is combined with humic acid or chitin, the aggregation of montmorillonite was effectively inhibited. The surface interaction energy model calculations reveal that the steric repulsion, rather than the increase in electronegativity, is the primary cause for the inhibition of aggregation by the addition of humic acid or chitin.
Conclusion: These results help explain the range of dispersion-aggregation behaviors observed in natural river and estuarine systems. It is postulated that the composition of suspended particles, specifically the availability of steric polymers such as those contained in humic acid, determine whether the river suspension is rapidly aggregated and settled or remains dispersed in suspension when it encounters increasingly saline environments of estuaries and oceans.
C1 [Furukawa, Yoko; Watkins, Janet L.] USN, Res Lab, Seafloor Sci Branch, Stennis Space Ctr, MS 39529 USA.
[Kim, Jinwook] Yonsei Univ, Dept Earth Syst Sci, Seoul 120749, South Korea.
[Curry, Kenneth J.] Univ So Mississippi, Dept Biol Sci, Hattiesburg, MS 39406 USA.
[Bennett, Richard H.] SEAPROBE Inc, Picayune, MS USA.
RP Furukawa, Y (reprint author), USN, Res Lab, Seafloor Sci Branch, Stennis Space Ctr, MS 39529 USA.
EM yoko.furukawa@nrlssc.navy.mil; jwatkins@nrlssc.navy.mil;
jinwook@yonsei.ac.kr; kenneth.curry@usm.edu;
rhbenn_seaprobe1@bellsouth.net
RI Furukawa, Yoko/B-3099-2013
FU NSF [OCE-0824569, OCE-0824566]
FX This study was funded by ONR/NRL Core 6.1 funding ( PE# 0601153N). We
also acknowledge partial support of NSF OCE-0824569 for KJC and partial
support of NSF OCE-0824566 for RHB. NRL Contribution JA/7430-08-2. NRL
Contribution JA/7430-08-XX.
NR 49
TC 20
Z9 20
U1 0
U2 15
PU BIOMED CENTRAL LTD
PI LONDON
PA CURRENT SCIENCE GROUP, MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T
4LB, ENGLAND
SN 1467-4866
J9 GEOCHEM T
JI Geochem. Trans.
PD JAN 23
PY 2009
VL 10
AR 2
DI 10.1186/1467-4866-10-2
PG 11
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 422RL
UT WOS:000264445300001
PM 19166595
ER
PT J
AU Davies, JA
Harrison, RA
Rouillard, AP
Sheeley, NR
Perry, CH
Bewsher, D
Davis, CJ
Eyles, CJ
Crothers, SR
Brown, DS
AF Davies, J. A.
Harrison, R. A.
Rouillard, A. P.
Sheeley, N. R., Jr.
Perry, C. H.
Bewsher, D.
Davis, C. J.
Eyles, C. J.
Crothers, S. R.
Brown, D. S.
TI A synoptic view of solar transient evolution in the inner heliosphere
using the Heliospheric Imagers on STEREO
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID CORONAL MASS EJECTIONS; LASCO; EARTH
AB By exploiting data from the STEREO/heliospheric imagers (HI) we extend a well-established technique developed for coronal analysis by producing time-elongation plots that reveal the nature of solar transient activity over a far more extensive region of the heliosphere than previously possible from coronagraph images. Despite the simplicity of these plots, their power in demonstrating how the plethora of ascending coronal features observed near the Sun evolve as they move antisunward is obvious. The time-elongation profile of a transient tracked by HI can, moreover, be used to establish its angle out of the plane-of-thesky; an illustration of such analysis reveals coronal mass ejection material that can be clearly observed propagating out to distances beyond 1AU. This work confirms the value of the time-elongation format in identifying/characterising transient activity in the inner heliosphere, whilst also validating the ability of HI to continuously monitor solar ejecta out to and beyond 1AU. Citation: Davies, J. A., R. A. Harrison, A. P. Rouillard, N. R. Sheeley Jr., C. H. Perry, D. Bewsher, C. J. Davis, C. J. Eyles, S. R. Crothers, and D. S. Brown (2009), A synoptic view of solar transient evolution in the inner heliosphere using the Heliospheric Imagers on STEREO, Geophys. Res. Lett., 36, L02102, doi: 10.1029/2008GL036182.
C1 [Davies, J. A.; Harrison, R. A.; Rouillard, A. P.; Perry, C. H.; Bewsher, D.; Davis, C. J.; Eyles, C. J.; Crothers, S. R.] Rutherford Appleton Lab, Space Sci & Technol Dept, Didcot OX11 0QX, Oxon, England.
[Brown, D. S.] Aberystwyth Univ, Inst Math & Phys, Aberystwyth SY23 3BZ, Dyfed, Wales.
[Sheeley, N. R., Jr.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Rouillard, A. P.] Univ Southampton, Sch Phys & Astron, Southampton, Hants, England.
[Eyles, C. J.] Univ Valencia, Grp Astron & Ciencias Espacia, Valencia, Spain.
RP Davies, JA (reprint author), Rutherford Appleton Lab, Space Sci & Technol Dept, Didcot OX11 0QX, Oxon, England.
EM j.a.davies@rl.ac.uk
RI Scott, Christopher/H-8664-2012;
OI Scott, Christopher/0000-0001-6411-5649; Brown,
Daniel/0000-0002-1618-8816; Bewsher, Danielle/0000-0002-6351-5170
FU University of Birmingham (UK); CSL (Belgium); NRL (USA); LMSAL; GSFC
(USA); MPI (Germany); IOTA; IAS (France)
FX STEREO/HI was developed by a consortium comprising RAL, the University
of Birmingham (UK), CSL (Belgium) and NRL (USA). SECCHI, led by NRL,
involves additional collaborators from LMSAL, GSFC (USA), MPI (Germany),
IOTA and IAS (France).
NR 14
TC 100
Z9 102
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD JAN 23
PY 2009
VL 36
AR L02102
DI 10.1029/2008GL036182
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 398QZ
UT WOS:000262747900002
ER
PT J
AU Casalini, R
Roland, CM
AF Casalini, R.
Roland, C. M.
TI Aging of the Secondary Relaxation to Probe Structural Relaxation in the
Glassy State
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DIELECTRIC-RELAXATION; BETA-RELAXATION; ALPHA-RELAXATION;
TEMPERATURE-DEPENDENCE; MOLECULAR GLASS; VISCOUS-LIQUIDS; TRANSITION;
VISCOSITY; DYNAMICS; SPECTROSCOPY
AB The importance of glass formation and the glass transition is linked to their universality, embracing many classes of materials: metallic, inorganic, and organic. There is no agreement on what drives this phenomenon; moreover, experiments are challenging due to the nonequilibrium nature of the glassy state. We present a new approach that provides information about the very slow structural relaxation in the glassy state and reveals the important role of the secondary relaxation. Structural (alpha) relaxation times for glassy polyvinylethylene were determined from changes in the properties of the secondary process during physical aging. These alpha-relaxation times exceed 3 years, making them inaccessible via direct measurement.
C1 [Casalini, R.] George Mason Univ, Dept Chem, Fairfax, VA 22030 USA.
[Casalini, R.; Roland, C. M.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
RP Casalini, R (reprint author), George Mason Univ, Dept Chem, Fairfax, VA 22030 USA.
FU Office of Naval Research
FX This work was supported by the Office of Naval Research.
NR 38
TC 72
Z9 72
U1 7
U2 26
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JAN 23
PY 2009
VL 102
IS 3
AR 035701
DI 10.1103/PhysRevLett.102.035701
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 398HR
UT WOS:000262723700043
PM 19257369
ER
PT J
AU Liu, X
Feldman, JL
Cahill, DG
Crandall, RS
Bernstein, N
Photiadis, DM
Mehl, MJ
Papaconstantopoulos, DA
AF Liu, Xiao
Feldman, J. L.
Cahill, D. G.
Crandall, R. S.
Bernstein, N.
Photiadis, D. M.
Mehl, M. J.
Papaconstantopoulos, D. A.
TI High Thermal Conductivity of a Hydrogenated Amorphous Silicon Film
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID LOW-ENERGY EXCITATIONS; THIN-FILMS; ACOUSTIC ATTENUATION;
BRILLOUIN-SCATTERING; NOBLE-METALS; SI; GLASSES; SOLIDS; TRANSITION;
SIMULATION
AB We measured the thermal conductivity kappa of an 80 mu m thick hydrogenated amorphous silicon film prepared by hot-wire chemical-vapor deposition with the 3 omega (80-300 K) and the time-domain thermoreflectance (300 K) methods. The kappa is higher than any of the previous temperature dependent measurements and shows a strong phonon mean free path dependence. We also applied a Kubo based theory using a tight-binding method on three 1000 atom continuous random network models. The theory gives higher kappa for more ordered models, but not high enough to explain our results, even after extrapolating to lower frequencies with a Boltzmann approach. Our results show that this material is more ordered than any amorphous silicon previously studied.
C1 [Liu, Xiao; Feldman, J. L.; Bernstein, N.; Photiadis, D. M.; Mehl, M. J.; Papaconstantopoulos, D. A.] USN, Res Lab, Washington, DC 20375 USA.
[Feldman, J. L.; Papaconstantopoulos, D. A.] George Mason Univ, Dept Computat & Data Sci, Fairfax, VA 22030 USA.
[Cahill, D. G.] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA.
[Cahill, D. G.] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA.
[Crandall, R. S.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Liu, X (reprint author), USN, Res Lab, Washington, DC 20375 USA.
RI Cahill, David/B-3495-2014; Mehl, Michael/H-8814-2016
FU Office of Naval Research
FX We thank Dr. B. P. Nelson for preparing the 80 mu m sample used in this
work. We also thank Dr. P. B. Allen, Dr. R. O. Pohl, and Dr. S.
Nakhmanson for helpful conversations. This work is supported by the
Office of Naval Research.
NR 43
TC 26
Z9 26
U1 7
U2 25
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JAN 23
PY 2009
VL 102
IS 3
AR 035901
DI 10.1103/PhysRevLett.102.035901
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 398HR
UT WOS:000262723700045
PM 19257371
ER
PT J
AU Eckermann, SD
Hoffmann, L
Hopfner, M
Wu, DL
Alexander, MJ
AF Eckermann, S. D.
Hoffmann, L.
Hoepfner, M.
Wu, D. L.
Alexander, M. J.
TI Antarctic NAT PSC belt of June 2003: Observational validation of the
mountain wave seeding hypothesis
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID POLAR STRATOSPHERIC CLOUDS; OZONE DEPLETION; DENITRIFICATION
AB Satellite observations of polar stratospheric clouds (PSCs) over Antarctica in June 2003 revealed small nitric acid trihydrate (NAT) particles forming suddenly along the vortex edge. Models suggest the trigger was mountain waves over the Antarctic Peninsula (AP) forming ice for NAT nucleation. We test this hypothesis by analyzing perturbations in stratospheric radiances from the Atmospheric Infrared Sounder (AIRS). AIRS data show mountain waves over the AP on 10-14 June, with no resolved wave activity before or after. Peak wave temperature amplitudes derived from independent 40 hPa channels all return values of 10-12 K, in agreement with values used to model this NAT event. These observations support a NAT wake from a small region of mountain wave activity over the AP as the source of this circumpolar NAT outbreak. Citation: Eckermann, S. D., L. Hoffmann, M. Hopfner, D. L. Wu, and M. J. Alexander (2009), Antarctic NAT PSC belt of June 2003: Observational validation of the mountain wave seeding hypothesis, Geophys. Res. Lett., 36, L02807, doi:10.1029/2008GL036629.
C1 [Eckermann, S. D.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Alexander, M. J.] NW Res Associates, Boulder, CO 80301 USA.
[Hoffmann, L.] Forschungszentrum Julich, D-52425 Julich, Germany.
[Hoepfner, M.] Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany.
[Wu, D. L.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Eckermann, SD (reprint author), USN, Res Lab, Div Space Sci, Code 7646, Washington, DC 20375 USA.
EM stephen.eckermann@nrl.navy.mil
RI Hopfner, Michael/A-7255-2013; Hoffmann, Lars/A-5173-2013; Wu,
Dong/D-5375-2012
OI Hopfner, Michael/0000-0002-4174-9531; Hoffmann,
Lars/0000-0003-3773-4377;
FU NASA's Earth Science Mission Directorate [NNH08AE43I]
FX SDE, DLW and MJA were supported by NASA's Earth Science Mission
Directorate (contract NNH08AE43I).
NR 17
TC 32
Z9 32
U1 0
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
EI 1944-8007
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD JAN 22
PY 2009
VL 36
AR L02807
DI 10.1029/2008GL036629
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 398QX
UT WOS:000262747700006
ER
PT J
AU Huang, JYT
Mawst, LJ
Kuech, TF
Song, X
Babcock, SE
Kim, CS
Vurgaftman, I
Meyer, JR
Holmes, AL
AF Huang, J. Y. T.
Mawst, L. J.
Kuech, T. F.
Song, X.
Babcock, S. E.
Kim, C. S.
Vurgaftman, I.
Meyer, J. R.
Holmes, A. L., Jr.
TI Design and characterization of strained InGaAs/GaAsSb type-II 'W'
quantum wells on InP substrates for mid-IR emission
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID DISTRIBUTED-FEEDBACK LASERS; CRITICAL-LAYER THICKNESS; MU-M-WAVELENGTH;
BAND PARAMETERS; OUTPUT POWER; PHOTOLUMINESCENCE; GAAS; SEMICONDUCTORS;
DIODES
AB InGaAs/GaAsSb type-II 'W' quantum wells (QWs) grown on InP substrates by metalorganic vapour phase epitaxy were investigated for potential emission wavelengths in the mid-infrared spectral region. Design studies using an 8-band k . p Hamiltonian model indicate that emission wavelengths near 3 mu m should be achievable without strain relaxation. Improved electron confinement can be achieved by adding higher-energy band gap alloys such as AlAsSb or GaInP around the type-II 'W' active region. Comparisons of the simulations with experiment indicate that photoluminescence (PL) spectra are consistent with a type-II band alignment. 4-periodtype-II 'W' In(0.8)Ga(0.2)As (similar to 4.0 nm)/GaAs(0.35)Sb(0.65) (similar to 1.5 nm) QWs separated by InP (5 nm) or AlAs(0.767)Sb(0.233) (1.5 nm) barrier layers, demonstrate room-temperature PL emission at similar to 2.1 mu m
C1 [Huang, J. Y. T.; Mawst, L. J.] Univ Wisconsin, Dept Elect & Comp Engn, Madison, WI 53706 USA.
[Kuech, T. F.] Univ Wisconsin, Dept Chem & Biol Engn, Madison, WI 53706 USA.
[Song, X.; Babcock, S. E.] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA.
[Kim, C. S.; Vurgaftman, I.; Meyer, J. R.] USN, Res Lab, Washington, DC 20375 USA.
[Holmes, A. L., Jr.] Univ Virginia, Dept Elect & Comp Engn, Charlottesville, VA 22904 USA.
RP Huang, JYT (reprint author), Univ Wisconsin, Dept Elect & Comp Engn, 1415 Johnson Dr, Madison, WI 53706 USA.
FU ARO MURI [W911NF-05-1-0262]; NSF [ECS-0355442]
FX The University of Wisconsin-Madison gratefully acknowledges support from
the ARO MURI W911NF-05-1-0262 (Dr John Prater) and NSF Grant No
ECS-0355442.
NR 26
TC 17
Z9 17
U1 3
U2 12
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 JAN 21
PY 2009
VL 42
IS 2
AR 025108
DI 10.1088/0022-3727/42/2/025108
PG 8
WC Physics, Applied
SC Physics
GA 385WB
UT WOS:000261843200014
ER
PT J
AU Lawenda, BD
Blumberg, JB
AF Lawenda, Brian D.
Blumberg, Jeffrey B.
TI Re: Should Supplemental Antioxidant Administration Be Avoided During
Chemotherapy and Radiation Therapy? Response
SO JOURNAL OF THE NATIONAL CANCER INSTITUTE
LA English
DT Letter
ID NECK-CANCER PATIENTS; CELL LUNG-CANCER; RANDOMIZED-TRIAL;
CIGARETTE-SMOKING; HEAD; MORTALITY; VITAMINS
C1 [Lawenda, Brian D.] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
[Lawenda, Brian D.] Indiana Univ, Sch Med, Dept Radiat Oncol, Indianapolis, IN 46202 USA.
[Lawenda, Brian D.] USN, Radiat Oncol & Breast Hlth Ctr, Med Ctr, San Diego, CA 92152 USA.
[Blumberg, Jeffrey B.] Tufts Univ, Friedman Sch Nutr Sci & Policy, Boston, MA 02111 USA.
[Blumberg, Jeffrey B.] Tufts Univ, Antioxidants Res Lab, Jean Mayer USDA Human Nutr Res Ctr Aging, Boston, MA 02111 USA.
RP Lawenda, BD (reprint author), USN, Radiat Oncol & Breast Hlth Ctr, Med Ctr, San Diego, CA 92152 USA.
EM brian.lawenda@med.navy.mil
NR 7
TC 0
Z9 0
U1 0
U2 1
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 JAN 21
PY 2009
VL 101
IS 2
BP 125
EP 126
DI 10.1093/jnci/djn447
PG 2
WC Oncology
SC Oncology
GA 398GU
UT WOS:000262721400013
ER
PT J
AU Pariat, E
Antiochos, SK
DeVore, CR
AF Pariat, E.
Antiochos, S. K.
DeVore, C. R.
TI A MODEL FOR SOLAR POLAR JETS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: corona; Sun: magnetic fields
ID X-RAY JETS; H-ALPHA SURGES; CORONAL MAGNETIC-FIELD; FLUX EMERGENCE;
PHYSICAL PARAMETERS; EMERGING FLUX; ACTIVE-REGION; ALFVEN WAVES;
WHITE-LIGHT; QUIET-SUN
AB We propose a model for the jetting activity that is commonly observed in the Sun's corona, especially in the open-field regions of polar coronal holes. Magnetic reconnection is the process driving the jets and a relevant magnetic configuration is the well known null-point and fan-separatrix topology. The primary challenge in explaining the observations is that reconnection must occur in a short-duration energetic burst, rather than quasi-continuously as is implied by the observations of long-lived structures in coronal holes, such as polar plumes. The key idea underlying our model for jets is that reconnection is forbidden for an axisymmetrical null-point topology. Consequently, by imposing a twisting motion that maintains the axisymmetry, magnetic stress can be built up to high levels until an ideal instability breaks the symmetry and leads to an explosive release of energy via reconnection. Using three-dimensional magnetohydrodynamic simulations, we demonstrate that this mechanism does produce massive, high-speed jets driven by nonlinear Alfven waves. We discuss the implications of our results for observations of the solar corona.
C1 [Pariat, E.; Antiochos, S. K.] NASA, Goddard Space Flight Ctr, Space Weather Lab, Greenbelt, MD 20771 USA.
[Pariat, E.; DeVore, C. R.] USN, Res Lab, Washington, DC 20375 USA.
[Pariat, E.] George Mason Univ, Ctr Earth Observing & Space Res, Fairfax, VA 22030 USA.
RP Pariat, E (reprint author), NASA, Goddard Space Flight Ctr, Space Weather Lab, Greenbelt, MD 20771 USA.
EM epariat@helio.gsfc.nasa.gov
RI Antiochos, Spiro/D-4668-2012; DeVore, C/A-6067-2015
OI Antiochos, Spiro/0000-0003-0176-4312; DeVore, C/0000-0002-4668-591X
FU NASA HTP; LWS TRT; SRT
FX E. P. thanks Mark Linton, Igniacio Ugarte-Urra, and Fernando
Moreno-Insertis for useful discussions. This work was supported, in
part, by the NASA HTP, LWS TR&T, and SR&T programs. The numerical
simulations were performed on DoD High Performance Computing Program
resources at NRL-DC and on the NRL Beehive cluster of the Space Science
Division.
NR 79
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U2 11
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 20
PY 2009
VL 691
IS 1
BP 61
EP 74
DI 10.1088/0004-637X/691/1/61
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 405BH
UT WOS:000263196600006
ER
PT J
AU Teng, SH
Veilleux, S
Anabuki, N
Dermer, CD
Gallo, LC
Nakagawa, T
Reynolds, CS
Sanders, DB
Terashima, Y
Wilson, AS
AF Teng, Stacy H.
Veilleux, Sylvain
Anabuki, Naohisa
Dermer, Charles D.
Gallo, Luigi C.
Nakagawa, Takao
Reynolds, Christopher S.
Sanders, D. B.
Terashima, Yuichi
Wilson, Andrew S.
TI SUZAKU OBSERVATIONS OF LOCAL ULTRALUMINOUS INFRARED GALAXIES
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: active; galaxies: individual (IRAS F05189-2524, IRAS
F08572+3915, Mrk 273, PKS 1345+12, Arp 220); galaxies: starburst;
X-rays: galaxies
ID ACTIVE GALACTIC NUCLEI; BROAD-LINE REGIONS; X-RAY SURVEY; OPTICAL
SPECTROSCOPY; CHANDRA OBSERVATIONS; SPACE-TELESCOPE; MOLECULAR GAS; IRAS
GALAXIES; JY SAMPLE; ARP-220
AB We report the results from our analysis of Suzaku X-ray Imaging Spectrometer ( XIS) ( 0.5-10 keV) and Hard X-ray Detector (HXD)/PIN (15-40 keV) observations of five well-known local ultraluminous infrared galaxies: IRAS F05189-2524, IRAS F08572+3915, Mrk 273, PKS 1345+12, and Arp 220. The XIS observations of F05189-2524 and Mrk 273 reveal strong iron lines consistent with Fe K alpha and changes in spectral shapes with respect to previous Chandra and XMM-Newton observations. Mrk 273 is also detected by the HXD/PIN at similar to 1.8 sigma. For F05189-2524, modeling of the data from the different epochs suggests that the change in spectral shape is likely due to the central source switching off, leaving behind a residual reflection spectrum, or an increase in the absorbing column. An increase in the covering fraction of the absorber can describe the spectral variations seen in Mrk 273, although a reduction in the intrinsic active galactic nucleus (AGN) luminosity cannot be formally ruled out. The Suzaku spectra of Mrk 273 are well fitted by a similar to 94% covering fraction model with a column density of similar to 10(24) cm(-2). The absorption corrected log[L(2-10keV)/L(IR)] ratio is consistent with those found in PG Quasars. The 0.5-10 keV spectrum of PKS 1345+12 and Arp 220 seem unchanged from previous observations and their hard X-ray emission is not convincingly detected by the HXD/PIN. The large column density derived from CO observations and the large equivalent width of an ionized Fe line in Arp 220 can be reconciled by an ionized reflection model. F08572+3915 is undetected in both the XIS and HXD/PIN, but the analysis of unpublished Chandra data provides a new measurement at low energies.
C1 [Teng, Stacy H.; Veilleux, Sylvain; Reynolds, Christopher S.; Wilson, Andrew S.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Anabuki, Naohisa] Osaka Univ, Dept Earth & Space Sci, Osaka 5600043, Japan.
[Dermer, Charles D.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Gallo, Luigi C.] St Marys Univ, Dept Phys & Astron, Halifax, NS B3H 3C3, Canada.
[Nakagawa, Takao] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa 2298510, Japan.
[Sanders, D. B.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Terashima, Yuichi] Ehime Univ, Dept Phys, Matsuyama, Ehime 7908577, Japan.
RP Teng, SH (reprint author), Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
EM stacyt@astro.umd.edu
RI XRAY, SUZAKU/A-1808-2009
FU Jet Propulsion Laboratory, Caltech; NASA [NNX06AI39G, NNX08AR56G]
FX We are grateful to the anonymous referee for providing very useful
comments and suggestions that have greatly improved this paper. We
acknowledge Coleman Miller for useful discussions. We are also grateful
for the extensive help on data reduction provided by the NASA/HEASARC
Suzaku GOF team. The data reduction for this paper made use of a module
in the Beowulf cluster ("the Borg") in the Department of Astronomy,
University of Maryland. This research also utilized the NASA/IPAC
Extragalactic Database (NED), which is operated by the Jet Propulsion
Laboratory, Caltech, under contract with NASA. We acknowledge support
from the NASA/ Suzaku Guest Observer Program under grants NNX06AI39G and
NNX08AR56G. This research has made use of data obtained from the Suzaku
satellite, a collaborative mission between the space agencies of Japan
(JAXA) and the USA (NASA).
NR 48
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PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 20
PY 2009
VL 691
IS 1
BP 261
EP 276
DI 10.1088/0004-637X/691/1/261
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 405BH
UT WOS:000263196600022
ER
PT J
AU Drake, JJ
Laming, JM
Ness, JU
Orlando, S
Starrfield, S
Beardmore, AP
Bode, MF
Evans, A
Eyres, SPS
Gehrz, RD
Goad, MR
Gonzalez-Riestra, R
Krautter, J
O'Brien, TJ
Osborne, JP
Page, KL
Schwarz, G
Woodward, CE
AF Drake, Jeremy J.
Laming, J. M.
Ness, J-U
Orlando, S.
Starrfield, S.
Beardmore, A. P.
Bode, M. F.
Evans, A.
Eyres, S. P. S.
Gehrz, R. D.
Goad, M. R.
Gonzalez-Riestra, R.
Krautter, J.
O'Brien, T. J.
Osborne, J. P.
Page, K. L.
Schwarz, G.
Woodward, C. E.
TI X-RAY SPECTROSCOPIC DIAGNOSIS OF A WIND-COLLIMATED BLAST WAVE AND
METAL-RICH EJECTA FROM THE 2006 EXPLOSION OF RS OPHIUCHI
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE shock waves; stars: individual (RS Oph); novae, cataclysmic variables;
X-rays: binaries; X-rays: stars
ID 1985 OUTBURST; SWIFT OBSERVATIONS; ATOMIC DATABASE; SYMBIOTIC STARS;
EMISSION-LINES; MASS ACCRETION; SHOCK-WAVE; ABUNDANCES; SYSTEMS; NEBULAE
AB Chandra HETG observations of RS Ophiuchi at day 13.9 of the 2006 outburst reveal a rich spectrum of emission lines from abundant ions formed over a wide temperature range (similar to 3 x 10(6) to 60 x 10(6) K) indicative of shock heating of the circumstellar medium by the expanding blast wave. Lines are asymmetric and strongly broadened (v similar to 2400 km s(-1) at zero intensity). Using simple analytical model profiles, we show how the lines are shaped by differential absorption in the red giant wind and explosion ejecta, and that shock heating to multimillion degree temperatures appears to have occurred preferentially in the direction perpendicular to the line of sight. We conclude that the asymmetric nature of the offset 1/r(2) density profile and likely equatorial circumstellar density enhancement in which the explosion occurred are responsible for both the shock collimation and broad range in plasma temperature observed. The ejecta mass deduced from X-ray absorption is more easily reconciled with the expected mass accretion rate for material enhanced in metals by up to an order of magnitude.
C1 [Drake, Jeremy J.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Laming, J. M.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Ness, J-U; Starrfield, S.] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.
[Orlando, S.] Osservatorio Astron Palermo GS Vaiana, I-90134 Palermo, Italy.
[Beardmore, A. P.; Goad, M. R.; Osborne, J. P.] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
[Bode, M. F.] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England.
[Evans, A.] Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England.
[Eyres, S. P. S.] Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England.
[Gehrz, R. D.; Woodward, C. E.] Univ Minnesota, Dept Astron, Sch Phys & Astron, Minneapolis, MN 55455 USA.
[Gonzalez-Riestra, R.] ESAC, XMM Sci Operat Ctr, Madrid 28080, Spain.
[Krautter, J.] Landessternwarte Konigstuhl, D-69117 Heidelberg, Germany.
[O'Brien, T. J.] Univ Manchester, Jodrell Bank Observ, Sch Phys & Astron, Macclesfield SK11 9DL, Cheshire, England.
[Schwarz, G.] W Chester Univ, Dept Geol & Astron, W Chester, PA 19383 USA.
RP Drake, JJ (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM jdrake@cfa.harvard.edu; Jan-Uwe.Ness@asu.edu; sumner.starrfield@asu.edu
OI Orlando, Salvatore/0000-0003-2836-540X
FU NASA [NAS8-39073, PF5-60039]; CXC; NSF; PPARC
FX We thank the Chandra Director, Harvey Tananbaum, for generous allocation
of Discretionary Time to observe RS Oph and the Chandra X-ray Center
(CXC) Mission Planning department for fitting the observation into the
schedule. J.J.D. was funded by NASA contract NAS8-39073 to the CXC
during the course of this research. J.-U.N. gratefully acknowledges
support provided by NASA through Chandra Postdoctoral Fellowship grant
PF5-60039 awarded by the CXC, which is operated by the Smithsonian
Astrophysical Observatory for NASA under contract NAS8-03060. S.
Starrfield received partial support from NSF and NASA grants to ASU. A.
P. B., J.P.O., and K. L. P. acknowledge funding from PPARC. Finally, we
extend warm thanks to the anonymous referee whose astute report enabled
us to significantly clarify and improve the manuscript.
NR 41
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PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 20
PY 2009
VL 691
IS 1
BP 418
EP 424
DI 10.1088/0004-637X/691/1/418
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 405BH
UT WOS:000263196600034
ER
PT J
AU Najita, JR
Doppmann, GW
Carr, JS
Graham, JR
Eisner, JA
AF Najita, Joan R.
Doppmann, Greg W.
Carr, John S.
Graham, James R.
Eisner, J. A.
TI HIGH-RESOLUTION K-BAND SPECTROSCOPY OF MWC 480 AND V1331 Cyg
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE circumstellar matter; planetary systems: protoplanetary disks; stars:
individual (MWC480, V1331 Cyg); stars: pre-main sequence
ID PRE-MAIN-SEQUENCE; T-TAURI STARS; YOUNG STELLAR OBJECTS; HERBIG AE/BE
STARS; INTERMEDIATE-MASS STARS; INFRARED CO EMISSION; INNER-DISK;
CIRCUMSTELLAR DISKS; OVERTONE EMISSION; ACCRETION DISKS
AB We present high-resolution (R = 25,000-35,000) K-band spectroscopy of two young stars, MWC 480 and V1331 Cyg. Earlier spectrally dispersed (R = 230) interferometric observations of MWC 480 indicated the presence of an excess continuum emission interior to the dust sublimation radius, with a spectral shape that was interpreted as evidence for hot water emission from the inner disk of MWC 480. Our spectrum of V1331 Cyg reveals strong emission from CO and hot water vapor, likely arising in a circumstellar disk. In comparison, our spectrum of MWC 480 appears mostly featureless. We discuss possible ways in which strong water emission from MWC 480 might go undetected in our data. If strong water emission is in fact absent from the inner disk, as our data suggest, the continuum excess interior to the dust sublimation radius that is detected in the interferometric data must have another origin. We discuss possible physical origins for the continuum excess.
C1 [Najita, Joan R.; Doppmann, Greg W.] Natl Opt Astron Observ, Tucson, AZ 85719 USA.
[Carr, John S.] USN, Res Lab, Washington, DC 20375 USA.
[Graham, James R.; Eisner, J. A.] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
RP Najita, JR (reprint author), Natl Opt Astron Observ, 950 N Cherry Ave, Tucson, AZ 85719 USA.
FU NASA Origins of Solar Systems program [NNH07AG51I]; NASA Astrobiology
Institute under Cooperative Agreement [CAN-02-OSS-02]; Life and Planets
Astrobiology Center (LAPLACE).; National Aeronautics and Space
Administration and the National Science Foundation
FX We thank Ben Sargent and Michael Meyer for helpful insights on high
temperature condensates. Financial support for this work was provided by
the NASA Origins of Solar Systems program (NNH07AG51I) and the NASA
Astrobiology Institute under Cooperative Agreement No. CAN-02-OSS-02
issued through the Office of Space Science. This work was also supported
by the Life and Planets Astrobiology Center (LAPLACE). Basic research in
infrared astronomy at the Naval Research Laboratory is supported by 6.1
base funding. This publication makes use of data products from the Two
Micron All Sky Survey, which is a joint project of the University of
Massachusetts and the Infrared Processing and Analysis Center/California
Institute of Technology, funded by the National Aeronautics and Space
Administration and the National Science Foundation. The authors wish to
recognize and acknowledge the very significant cultural role and
reverence that the summit of Mauna Kea has always had within the
indigenous Hawaiian community. We are most fortunate to have the
opportunity to conduct observations from this mountain.
NR 72
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PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 20
PY 2009
VL 691
IS 1
BP 738
EP 748
DI 10.1088/0004-637X/691/1/738
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 405BH
UT WOS:000263196600063
ER
PT J
AU Wang, YM
Ko, YK
Grappin, R
AF Wang, Y. -M.
Ko, Y. -K.
Grappin, R.
TI SLOW SOLAR WIND FROM OPEN REGIONS WITH STRONG LOW-CORONAL HEATING
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE solar wind; Sun: abundances; Sun: corona; Sun: magnetic fields
ID FLUX-TUBE DIVERGENCE; MAGNETIC-FIELDS; INTERPLANETARY; ACCELERATION;
TEMPERATURE; IONIZATION; HOLES; SPEED; FLOW; VICINITY
AB By comparing solar wind data taken by the Advanced Composition Explorer during 1998-2007 with extrapolations of the observed photospheric magnetic field, we verify that high O(7+)/O(6+) and Fe/O ratios are associated with low wind speeds, large expansion factors, strong footpoint fields, and high mass and energy flux densities at the coronal base. As demonstrated by model calculations, these correlations are consistent with the idea that the bulk of the slow wind originates from regions of rapidly diverging open flux, where the coronal heating is concentrated at low heights. We identify two main components of the slow wind, one emanating from small coronal holes near active regions and characterized by particularly strong low-coronal heating, the other coming from just inside the polar-hole boundaries and characterized by weaker low-coronal heating and intermediate O(7+)/O(6+) and Fe/O ratios.
C1 [Wang, Y. -M.; Ko, Y. -K.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Grappin, R.] CNRS, LUTH, Observ Paris, F-92195 Meudon, France.
RP Wang, YM (reprint author), USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
EM yi.wang@nrl.navy.mil; yko@ssd5.nrl.navy.mil; roland.grappin@obspm.fr
FU NASA; Office of Naval Research.
FX We thank the ACE Science Center and instrument teams for making
available the ACE Level 2 observations used here; we are especially
indebted to J. M. Raines, S. T. Lepri, and T. H. Zurbuchen for preparing
Version 3 of the SWICS/SWIMS database. The MWO magnetograph measurements
were provided by R. K. Ulrich. This work was funded by NASA and the
Office of Naval Research.
NR 48
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PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 20
PY 2009
VL 691
IS 1
BP 760
EP 769
DI 10.1088/0004-637X/691/1/760
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 405BH
UT WOS:000263196600065
ER
PT J
AU Landi, E
Cranmer, SR
AF Landi, E.
Cranmer, S. R.
TI ION TEMPERATURES IN THE LOW SOLAR CORONA: POLAR CORONAL HOLES AT SOLAR
MINIMUM
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE line: profiles; Sun: corona; Sun: UV radiation; techniques:
spectroscopic; turbulence; waves
ID ALFVEN WAVES; CYCLOTRON WAVES; TRANSITION REGION; MAGNETOHYDRODYNAMIC
MODE; LINE WIDTHS; MINOR IONS; WIND IONS; ACCELERATION; TURBULENCE;
SUMER
AB In the present work we use a deep-exposure spectrum taken by the SUMER spectrometer in a polar coronal hole in 1996 to measure the ion temperatures of a large number of ions at many different heights above the limb between 0.03 and 0.17 solar radii. We find that the measured ion temperatures are almost always larger than the electron temperatures and exhibit a nonmonotonic dependence on the charge-to-mass ratio. We use these measurements to provide empirical constraints to a theoretical model of ion heating and acceleration based on gradually replenished ion-cyclotron waves. We compare the wave power required to heat the ions to the observed levels to a prediction based on a model of anisotropic magnetohydrodynamic turbulence. We find that the empirical heating model and the turbulent cascade model agree with one another, and explain the measured ion temperatures, for charge-to-mass ratios smaller than about 0.25. However, ions with charge-to-mass ratios exceeding 0.25 disagree with the model; the wave power that they require to be heated to the measured ion temperatures shows an increase with charge-to-mass ratio (i. e., with increasing frequency) that cannot be explained by a traditional cascade model. We discuss possible additional processes that might be responsible for the inferred surplus of wave power.
C1 [Landi, E.] USN, Res Lab, Artep Inc, Washington, DC 20375 USA.
[Cranmer, S. R.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Landi, E (reprint author), USN, Res Lab, Artep Inc, 4555 Overlook Ave SW, Washington, DC 20375 USA.
RI Landi, Enrico/H-4493-2011
FU NASA [NNG06EA14I, NNH06CD24C, NNX06AG95G, NNG04GE77G]
FX The work of Enrico Landi is supported by the NNG06EA14I, NNH06CD24C as
well as other NASA grants. The work of Steven Cranmer is supported by
NASA under grants NNX06AG95G and NNG04GE77G to the Smithsonian
Astrophysical Observatory. The authors would like to thank Adriaan van
Ballegooijen and Mari Paz Miralles for valuable discussions.
NR 59
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PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 20
PY 2009
VL 691
IS 1
BP 794
EP 805
DI 10.1088/0004-637X/691/1/794
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 405BH
UT WOS:000263196600068
ER
PT J
AU Razzaque, S
Mena, O
Dermer, CD
AF Razzaque, Soebur
Mena, Olga
Dermer, Charles D.
TI PROMPT TeV EMISSION FROM COSMIC RAYS ACCELERATED BY GAMMA-RAY BURSTS
INTERACTING WITH A SURROUNDING STELLAR WIND
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE gamma rays: bursts; gamma rays: theory; radiation mechanisms:
non-thermal
ID INTERGALACTIC MAGNETIC-FIELDS; HIGH-ENERGY EMISSION; AFTERGLOWS;
FIREBALLS; SPECTRA; FLUX
AB Protons accelerated in the internal shocks of a long-duration gamma-ray burst (GRB) can escape the fireball as cosmic rays by converting to neutrons. Hadronic interactions of these neutrons inside a stellar wind bubble created by the progenitor star will produce TeV gamma-rays via neutral meson decay and synchrotron radiation by charged pion-decay electrons in the wind magnetic field. Such gamma-rays should be observable from nearby GRBs by currently running and upcoming ground-based detectors.
C1 [Razzaque, Soebur; Dermer, Charles D.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Mena, Olga] Univ Valencia, CSIC, Inst Fis Corpuscular, Valencia, Spain.
RP Razzaque, S (reprint author), USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
EM srazzaque@ssd5.nrl.navy.mil
FU Office of Naval Research
FX The work of S.R. and C.D.D. is supported by the Office of Naval
Research.
NR 31
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U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
EI 2041-8213
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD JAN 20
PY 2009
VL 691
IS 1
BP L37
EP L40
DI 10.1088/0004-637X/691/1/L37
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 404JU
UT WOS:000263148600009
ER
PT J
AU Sun, PF
Fernandez, S
Marovich, MA
Palmer, DR
Celluzzi, CM
Boonnak, K
Liang, ZD
Subramanian, H
Porter, KR
Sun, W
Burgess, TH
AF Sun, Peifang
Fernandez, Stefan
Marovich, Mary A.
Palmer, Dupeh R.
Celluzzi, Christina M.
Boonnak, Kobporn
Liang, Zhaodong
Subramanian, Hemavathy
Porter, Kevin R.
Sun, Wellington
Burgess, Timothy H.
TI Functional characterization of ex vivo blood myeloid and plasmacytoid
dendritic cells after infection with dengue virus
SO VIROLOGY
LA English
DT Article
DE Dengue virus; Viral infection; Dendritic cell subset; Cytokine;
Toll-like receptor
ID DOUBLE-STRANDED-RNA; TOLL-LIKE RECEPTOR-3; INTERFERON-PRODUCING CELLS;
PROTEIN-KINASE-R; DC-SIGN; ACTIVATION; RECOGNITION; SUBSETS; DISEASE;
TLR7
AB Myeloid and plasmacytoid dendritic cells (mDC and pDC) are naturally distinctive subsets. We exposed both subsets to dengue virus (DV) in vitro and investigated their functional characteristics. High levels of DV replication in mDC were found to correlate with DC-SIGN expression. Production of inflammatory cytokines by mDC increased gradually after DV-infection, which was dependent on DV replication. Co-stimulatory markers were upregulated on mDC upon DV-infection. On the contrary, lower levels of DV-replication were observed in pDC, but the cytokine production in pDC was quicker and stronger. This cytokine response was not dependent on viral replication, but dependent on cell endosomal activity and TLR7, and could be also induced by purified DV genome RNA. These results clearly suggested functional differences between mDC and pDC in response to DV infection. Additionally, the TLR7-mediated recognition of DV RNA may be involved in pDC functional activation. (c) 2008 Elsevier Inc. All rights reserved.
C1 [Sun, Peifang; Liang, Zhaodong; Subramanian, Hemavathy; Porter, Kevin R.; Burgess, Timothy H.] USN, Med Res Ctr, Silver Spring, MD 20910 USA.
[Fernandez, Stefan; Marovich, Mary A.; Palmer, Dupeh R.; Boonnak, Kobporn; Sun, Wellington] Walter Reed Army Inst Res, Silver Spring, MD USA.
[Celluzzi, Christina M.] Univ Maryland, Sch Med, Baltimore, MD 21201 USA.
RP Sun, PF (reprint author), USN, Med Res Ctr, 503 Robert Grant Ave, Silver Spring, MD 20910 USA.
EM sunp@nmrc.navy.mil
RI Porter, Kevin/A-8027-2011
NR 39
TC 48
Z9 51
U1 0
U2 2
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0042-6822
J9 VIROLOGY
JI Virology
PD JAN 20
PY 2009
VL 383
IS 2
BP 207
EP 215
DI 10.1016/j.virol.2008.10.022
PG 9
WC Virology
SC Virology
GA 396QH
UT WOS:000262605700006
PM 19013627
ER
PT J
AU Yasar, M
Mallory, R
Petrou, A
Hanbicki, AT
Kioseoglou, G
Li, CH
van't Erve , OMJ
Jonker, BT
AF Yasar, M.
Mallory, R.
Petrou, A.
Hanbicki, A. T.
Kioseoglou, G.
Li, C. H.
van't Erve, O. M. J.
Jonker, B. T.
TI Spin injection studies into GaAs quantum wells in the presence of
confined electrons
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE aluminium compounds; electroluminescence; gallium arsenide; III-V
semiconductors; iron; light emitting diodes; phonon-exciton
interactions; polarisation; semiconductor doping; semiconductor quantum
wells; spin polarised transport
ID SEMICONDUCTOR HETEROSTRUCTURE; RECOMBINATION; RELAXATION; BARRIER
AB We compare the electroluminescence spectra (spectral composition and polarization characteristics) of two types of Fe-based AlGaAs/GaAs n-i-p spin light emitting diodes (spin LEDs). In type A spin LEDs the GaAs quantum well (QW) does not contain any confined carriers, while in type B LEDs the GaAs QW is occupied by confined electrons generated by excess n-type doping in the AlGaAs(n) barrier. Type B LEDs show a significantly smaller circular polarization at the e(1)h(1) feature than type A devices. Other differences include the presence of the e(1)...(1) exciton as well as excitonic phonon replicas in type B LEDs. Possible mechanisms for these differences are discussed.
C1 [Yasar, M.; Mallory, R.; Petrou, A.] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA.
[Hanbicki, A. T.; Kioseoglou, G.; Li, C. H.; van't Erve, O. M. J.; Jonker, B. T.] USN, Res Lab, Washington, DC 20375 USA.
[Kioseoglou, G.] Univ Crete, Dept Mat Sci & Technol, Iraklion 71003, Greece.
RP Yasar, M (reprint author), SUNY Buffalo, Dept Phys, 239 Fronczak Hall, Buffalo, NY 14260 USA.
EM myasar@buffalo.edu
FU NSF [ECCS0824220]; ONR [N000140610174]; NRL
FX This work was supported by the NSF (Grant No. ECCS0824220) and ONR
(Grant No. N000140610174) and core programs at NRL.
NR 18
TC 7
Z9 7
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 JAN 19
PY 2009
VL 94
IS 3
AR 032102
DI 10.1063/1.3073752
PG 3
WC Physics, Applied
SC Physics
GA 398HU
UT WOS:000262724000015
ER
PT J
AU Butler, JJ
Flom, SR
Shirk, JS
Taunay, TE
Wright, BM
Wiggins, MJ
AF Butler, James J.
Flom, Steven R.
Shirk, James S.
Taunay, Thierry E.
Wright, Barbara M.
Wiggins, Michael J.
TI Optical limiting properties of nonlinear multimode waveguide arrays
SO OPTICS EXPRESS
LA English
DT Article
ID DISCRETE SOLITONS; LASER-PULSES; FIBER ARRAY; EXCITATION; STATE
AB An experimental investigation of the transmission of multimode capillary waveguide arrays containing a liquid nonlinear absorber shows an enhanced nonlinear response relative to that found in a single waveguide and to the same length of bulk material. Comparison of the nonlinear response of arrays with different pitch to diameter (d/Lambda) ratios confirm that both the intensity distribution within an individual waveguide and coupling between the elements of the array influence the overall nonlinear response. (C) 2008 Optical Society of America
C1 [Butler, James J.] Pacific Univ, Dept Phys, Forest Grove, OR 97116 USA.
[Flom, Steven R.; Shirk, James S.; Taunay, Thierry E.; Wright, Barbara M.] USN, Res Lab, Washington, DC 20375 USA.
[Wiggins, Michael J.] NanoMed Syst Inc, Mentor, OH 44060 USA.
RP Butler, JJ (reprint author), Pacific Univ, Dept Phys, Forest Grove, OR 97116 USA.
EM jjbutler@pacificu.edu
FU ONR; Naval Research Lab; United States Naval Academy
FX We thank ONR, the Naval Research Lab, and the United States Naval
Academy for financial support.
NR 17
TC 5
Z9 5
U1 1
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 JAN 19
PY 2009
VL 17
IS 2
BP 804
EP 809
DI 10.1364/OE.17.000804
PG 6
WC Optics
SC Optics
GA 408JW
UT WOS:000263432300045
PM 19158894
ER
PT J
AU Krowne, CM
AF Krowne, Clifford M.
TI Spin moments of particles detected using the spin Hall effect of light
through weak quantum measurements
SO PHYSICS LETTERS A
LA English
DT Article
ID LEFT-HANDEDNESS
AB Here it is shown that magnetic materials with either microscopic atomic or molecular moments or macroscopic nanoscopic moments, represented by macroscopic permeability. call be detected by the quantum spin Hall effect of light (QSHEL). showing "spin" displacements normal to the interface with greater richness than previously found for dielectric materials, Also, it is proven for isotropic left-handed materials (LHMs), which rely upon magnetic action, that they do not display altered QSHEL results compared to their right-handed material (RHM) cousins which do. Published by Elsevier B.V.
C1 USN, Microwave Technol Branch, Div Elect Sci & Technol, Res Lab, Washington, DC 20375 USA.
RP Krowne, CM (reprint author), USN, Microwave Technol Branch, Div Elect Sci & Technol, Res Lab, Washington, DC 20375 USA.
EM krowne@webbsight.nrl.navy.mil
NR 11
TC 9
Z9 9
U1 1
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9601
J9 PHYS LETT A
JI Phys. Lett. A
PD JAN 19
PY 2009
VL 373
IS 4
BP 466
EP 472
DI 10.1016/j.physleta.2008.11.044
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 405FF
UT WOS:000263207600014
ER
PT J
AU Shettle, EP
DeLand, MT
Thomas, GE
Olivero, JJ
AF Shettle, E. P.
DeLand, M. T.
Thomas, G. E.
Olivero, J. J.
TI Long term variations in the frequency of polar mesospheric clouds in the
Northern Hemisphere from SBUV
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID NOCTILUCENT CLOUDS; TRENDS
AB Earlier studies have indicated that there is a secular increase in the occurrence frequency of polar mesospheric clouds (PMC), along with an anti-correlation with the solar activity. The combined data records from the Solar Backscatter Ultraviolet (SBUV and SBUV/2) instruments provide the longest satellite record (28 years) of the PMC frequency of occurrence. This record has been analyzed to determine the long-term variation in the PMC occurrence frequency in each of three latitude bands (54 degrees-64 degrees N, 64 degrees-74 degrees N, 74 degrees-82 degrees N). This analysis includes an adjustment for changes in the local time of measurement due to the satellite orbital drift, to take into account diurnal variations in the PMC frequency. Multiple linear regression fits using solar activity and time show that the occurrence frequency nearly doubles from solar maximum to solar minimum in all latitude bands. There is a long-term increase in the occurrence frequency ranging from 7% per decade at 64 degrees-74 degrees N to 20% per decade at 74 degrees-82 degrees N. These secular increases are significant at the 95% level for the 74 degrees-82 degrees N and all latitudes combined. We find a time lag of half a year (with an uncertainty of one year) between the minimum solar activity and the maximum PMC activity, consistent with our previous findings for PMC albedo. Citation: Shettle, E. P., M. T. DeLand, G. E. Thomas, and J.J. Olivero (2009), Long term variations in the frequency of polar mesospheric clouds in the Northern Hemisphere from SBUV, Geophys. Res. Lett., 36, L02803, doi:10.1029/2008GL036048.
C1 [Shettle, E. P.] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
[DeLand, M. T.] Sci Syst & Applicat Inc, Lanham, MD 20706 USA.
[Olivero, J. J.] Embry Riddle Aeronaut Univ, Dept Phys Sci, Daytona Beach, FL 32114 USA.
[Thomas, G. E.] Univ Colorado, LASP, Boulder, CO 80309 USA.
RP Shettle, EP (reprint author), USN, Res Lab, Remote Sensing Div, Code 7227, Washington, DC 20375 USA.
EM shettle@nrl.navy.mil
NR 15
TC 48
Z9 48
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 JAN 17
PY 2009
VL 36
AR L02803
DI 10.1029/2008GL036048
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 396YH
UT WOS:000262628200004
ER
PT J
AU Ligler, FS
AF Ligler, Frances S.
TI Perspective on Optical Biosensors and Integrated Sensor Systems
SO ANALYTICAL CHEMISTRY
LA English
DT Review
ID UNIVERSAL BEAD ARRAYS; OF-CARE DIAGNOSTICS; MICROFLUIDIC DEVICES;
ANTIMICROBIAL PEPTIDES; RAMAN-SCATTERING; GLOBAL HEALTH; CHIP DEVICES;
CELL; MICROARRAYS; SURFACE
AB Optical biosensors have begun to move from the laboratory to the point of use. This trend will be accelerated by new concepts for molecular recognition, integration of microfluidics and optics, simplified fabrication technologies, improved approaches to biosensor system integration, and dramatically increased awareness of the applicability of sensor technology to improve public health and environmental monitoring. Examples of innovations are identified that will lead to smaller, faster, cheaper optical biosensor systems with capacity to provide effective and actionable information.
C1 USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
RP Ligler, FS (reprint author), USN, Res Lab, Ctr Biomol Sci & Engn, 455 Overlook Ave SW, Washington, DC 20375 USA.
FU NIH [U01AI075489]; NRL Work Unit
FX The preparation of this article was supported by NIH Grant U01AI075489
and by NRL Work Unit 6.2 6006. The views are those of the author and do
not reflect opinions or policy of NIH, the U.S. Navy, or the Department
of Defense. I thank Drs. Jeffrey Erickson and Chris Taitt for careful
critique of the manuscript.
NR 123
TC 121
Z9 122
U1 3
U2 98
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD JAN 15
PY 2009
VL 81
IS 2
BP 519
EP 526
DI 10.1021/ac8016289
PG 8
WC Chemistry, Analytical
SC Chemistry
GA 394WB
UT WOS:000262482700001
PM 19140774
ER
PT J
AU Gotes, JD
Benavides, LC
Carmichael, MG
Hueman, MT
Holmes, JP
Khoo, S
Stojadinovic, A
von Hafie, E
Ponniah, S
Peoples, GE
AF Gotes, J. D.
Benavides, L. C.
Carmichael, M. G.
Hueman, M. T.
Holmes, J. P.
Khoo, S.
Stojadinovic, A.
von Hafie, E.
Ponniah, S.
Peoples, G. E.
TI Circulating regulatory (CD4(+)CD25(+)FOXP3(+)) T cells decrease in
breast cancer patients after vaccination with an Ii-Key-modified class
II HER2/neu peptide (AE37)
SO CANCER RESEARCH
LA English
DT Meeting Abstract
CT 31st Annual Meeting of the San Antonio Breast Cancer Symposium
CY DEC 10-14, 2008
CL San Antonio, TX
C1 Brooke Army Med Ctr, Ft Sam Houston, TX 78234 USA.
USUHS, Dept Surg, Bethesda, MD USA.
USN, San Diego Med Ctr, San Diego, CA 92152 USA.
Walter Reed Army Med Ctr, Washington, DC 20307 USA.
Antigen Express Inc, Worcester, MA USA.
NR 0
TC 0
Z9 0
U1 0
U2 3
PU AMER ASSOC CANCER RESEARCH
PI PHILADELPHIA
PA 615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA
SN 0008-5472
J9 CANCER RES
JI Cancer Res.
PD JAN 15
PY 2009
VL 69
IS 2
SU S
BP 242S
EP 242S
PG 1
WC Oncology
SC Oncology
GA 396HQ
UT WOS:000262583201152
ER
PT J
AU Benavides, LC
Gates, JD
Holmes, JP
Mittendorf, EA
Ponniah, S
Peoples, GE
AF Benavides, L. C.
Gates, J. D.
Holmes, J. P.
Mittendorf, E. A.
Ponniah, S.
Peoples, G. E.
TI Optimal method of dosing HER2/neu peptide vaccines: US Military Cancer
Institute Clinical Trials Group Study 1-01, 1-02, 1-03, and 1-04
SO CANCER RESEARCH
LA English
DT Meeting Abstract
CT 31st Annual San Antonio Breast Cancer Symposium
CY DEC 10-14, 2008
CL San Antonio, TX
C1 Brooke Army Med Ctr, Ft Sam Houston, TX 78234 USA.
USN, Med Ctr, San Diego, CA 92152 USA.
Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA.
USUHS, Dept Surg, Bethesda, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER ASSOC CANCER RESEARCH
PI PHILADELPHIA
PA 615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA
SN 0008-5472
J9 CANCER RES
JI Cancer Res.
PD JAN 15
PY 2009
VL 69
IS 2
BP 244S
EP 244S
PG 1
WC Oncology
SC Oncology
GA 396HQ
UT WOS:000262583201157
ER
PT J
AU Holmes, JP
Benavides, LC
Gatav, JD
Mittendorf, EA
Ponniah, S
Peoples, GE
AF Holmes, J. P.
Benavides, L. C.
Gatav, J. D.
Mittendorf, E. A.
Ponniah, S.
Peoples, G. E.
TI Incidence of hormone-receptor negative and basal type breast tumors
among HLA-A2(+) patients and possible implications for cancer vaccine
trials: US Military Cancer Institute clinical trials group study I-01,
I-02, I-03, and I-04
SO CANCER RESEARCH
LA English
DT Meeting Abstract
CT 31st Annual Meeting of the San Antonio Breast Cancer Symposium
CY DEC 10-14, 2008
CL San Antonio, TX
C1 USN, Med Ctr, San Diego, CA 92152 USA.
Brooke Army Med Ctr, Ft Sam Houston, TX 78234 USA.
UTMD Anderson Canc Ctr, Houston, TX USA.
USUHS, Dept Surg, Bethesda, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER ASSOC CANCER RESEARCH
PI PHILADELPHIA
PA 615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA
SN 0008-5472
J9 CANCER RES
JI Cancer Res.
PD JAN 15
PY 2009
VL 69
IS 2
SU S
BP 248S
EP 249S
PG 2
WC Oncology
SC Oncology
GA 396HQ
UT WOS:000262583201171
ER
PT J
AU Armstrong, RW
Arnold, W
Zerilli, FJ
AF Armstrong, Ronald W.
Arnold, Werner
Zerilli, Frank J.
TI Dislocation mechanics of copper and iron in high rate deformation tests
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE acoustic wave velocity; copper; dislocation density; iron; plastic
deformation; plasticity; shock wave effects; yield stress
ID MATERIAL DYNAMICS; SHOCK-WAVE; STRAIN-RATE; BEHAVIOR; METALS; PRESSURE;
CRYSTALS; RISE
AB Different dislocation processes are shown to be operative under high rate loading by impact-induced shock tests as compared with shockless isentropic compression experiments (ICEs). Under shock loading, the plastic deformation rate dependence of the flow stress of copper is attributed to dislocation generation at the propagating shock front, while in shockless ICEs, the rate dependence is attributed to drag-controlled mobile dislocation movement from within the originally resident dislocation density. In contrast with shock loading, shockless isentropic compression can lead to flow stress levels approaching the theoretical yield stress and dislocation velocities approaching the speed of sound. In iron, extensive shock measurements reported for plate impact tests are explained in terms of plasticity-control via the nucleation of deformation twins at the propagating shock front.
C1 [Armstrong, Ronald W.] Univ Maryland, College Pk, MD 20742 USA.
[Arnold, Werner] MBDA TDW, D-86523 Schrobenhausen, Germany.
[Zerilli, Frank J.] Naval Surface Warfare Ctr, Dept Res & Technol, Indian Head, MD 20640 USA.
RP Armstrong, RW (reprint author), Univ Maryland, College Pk, MD 20742 USA.
EM rona@umd.edu
NR 27
TC 46
Z9 46
U1 2
U2 28
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 JAN 15
PY 2009
VL 105
IS 2
AR 023511
DI 10.1063/1.3067764
PG 7
WC Physics, Applied
SC Physics
GA 401VQ
UT WOS:000262970900028
ER
PT J
AU Haegel, NM
Mills, TJ
Talmadge, M
Scandrett, C
Frenzen, CL
Yoon, H
Fetzer, CM
King, RR
AF Haegel, N. M.
Mills, T. J.
Talmadge, M.
Scandrett, C.
Frenzen, C. L.
Yoon, H.
Fetzer, C. M.
King, R. R.
TI Direct imaging of anisotropic minority-carrier diffusion in ordered
GaInP
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE carrier mobility; gallium compounds; III-V semiconductors; indium
compounds; minority carriers; photoluminescence
ID ELECTRONS; GAAS
AB An all-optical technique has been used to provide the first direct measurement of anisotropic minority-carrier diffusion in an ordered alloy of GaInP. Direct imaging of the minority-carrier diffusion distribution resulting from generation at a quasipoint source is obtained using an optical microscope coupled to a scanning electron microscope. Minority-carrier diffusion lengths ranging from 3 to 60 mu m are measured by this technique in double heterostructures of GaInP, GaAs, and GaInAs, providing a key parameter of interest to the performance of state-of-the-art triple junction solar cells. Here we show a direct measurement of anisotropy in minority-carrier mobility in ordered GaInP, which is evident in the oval-shaped distribution of the recombination luminescence. A factor of 1.6 increase in minority electron mobility along the [110] major axis is reported.
C1 [Haegel, N. M.; Mills, T. J.; Talmadge, M.] USN, Postgrad Sch, Dept Phys, Monterey, CA 93943 USA.
[Scandrett, C.; Frenzen, C. L.] USN, Postgrad Sch, Dept Math, Monterey, CA 93943 USA.
[Yoon, H.; Fetzer, C. M.; King, R. R.] Spectrolab Inc, Sylmar, CA 91342 USA.
RP Haegel, NM (reprint author), USN, Postgrad Sch, Dept Phys, Monterey, CA 93943 USA.
EM nmhaegel@nps.edu
FU NPS by NSF [DMR-0203397, DMR-0526330]
FX This work was supported at NPS by NSF Grant Nos. DMR-0203397 and
DMR-0526330.
NR 18
TC 19
Z9 19
U1 1
U2 24
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 JAN 15
PY 2009
VL 105
IS 2
AR 023711
DI 10.1063/1.3068196
PG 5
WC Physics, Applied
SC Physics
GA 401VQ
UT WOS:000262970900057
ER
PT J
AU Yamachika, R
Lu, X
Wegner, D
Wang, Y
Wachowiak, A
Grobis, M
Beltran, LMC
Long, JR
Pederson, M
Crommie, MF
AF Yamachika, Ryan
Lu, Xinghua
Wegner, Daniel
Wang, Yayu
Wachowiak, Andre
Grobis, Michael
Beltran, Lianne M. C.
Long, Jeffrey R.
Pederson, Mark
Crommie, Michael F.
TI Local Electronic Properties of Titanocene Chloride Dimer Molecules on a
Metal Surface
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID COBALT(II) PHTHALOCYANINE; COMPLEXES; ALDEHYDES; TITANIUM; HF; ZR; TI
AB We have examined the local electronic behavior of titanocene chloride dimer molecules, [CP(2)TiCl](2) (CP = CA), on Au(111) using both scanning tunneling microscopy (STM) and density functional theory (DFT). Isolated dimeric molecules are seen to decorate gold step edges at low surface coverages and two coexisting monolayer phases are observed at higher coverages. Differential conductance STM spectroscopy shows a variety of structure in the electronic local density of states for single molecules and for the two monolayer phases. DFT calculations modeling an isolated titanocene chloride dimer do not reproduce the wide variations seen in spectral density, suggesting that a fraction of titanocene dimers break apart into metallocene monomers on the Au(111) surface and display magnetic behavior.
C1 [Yamachika, Ryan; Lu, Xinghua; Wegner, Daniel; Wang, Yayu; Wachowiak, Andre; Grobis, Michael; Crommie, Michael F.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Lu, Xinghua; Wachowiak, Andre; Crommie, Michael F.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Beltran, Lianne M. C.; Long, Jeffrey R.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Pederson, Mark] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RP Crommie, MF (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM crommie@berkeley.edu
RI Lu, Xinghua/F-2655-2010; Wegner, Daniel/G-3545-2011; Wegner,
Daniel/F-9700-2015
FU NSF [ECS-0609469]
FX This work was supported by NSF Grant ECS-0609469. D.W. is grateful for
funding by the Alexander von Humboldt Foundation. Y.W. thanks the Miller
Institute for a research fellowship.
NR 23
TC 2
Z9 2
U1 3
U2 16
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 JAN 15
PY 2009
VL 113
IS 2
BP 677
EP 680
DI 10.1021/jp807626w
PG 4
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 392TH
UT WOS:000262324600031
ER
PT J
AU Urbieta, A
Schulte, K
Grandidier, B
Deresmes, D
Erwin, SC
Stievenard, D
AF Urbieta, A.
Schulte, K.
Grandidier, B.
Deresmes, D.
Erwin, S. C.
Stievenard, D.
TI (6 x 2) Reconstruction of the Ag/Si(111) surface at 77 K
SO SURFACE SCIENCE
LA English
DT Article
DE Silver; Silicon; Surface reconstruction; Scanning tunneling microscopy;
Density functional theory
ID MODEL
AB The ground state of the Ag/Si(111)-(3 x 1) has been investigated by low temperature scanning tunneling microscopy (STM) and density-functional theory. The Fourier transform of the STM image reveals a (6 x 2) reconstruction, which is theoretically found to yield a reconstruction with lower energy than the (3 x 1). The most stable (6 x 2) structural model leads to excellent correspondence between experimental and simulated STM images, and reveals a dimerization of the silver atoms in the channels formed by neighbouring honeycomb Si chains. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Urbieta, A.; Grandidier, B.; Deresmes, D.; Stievenard, D.] CNRS, IEMN, UMR 8520, Dept ISEN,Inst Elect Microelect & Nanotechnol, F-59046 Lille, France.
[Schulte, K.] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England.
[Erwin, S. C.] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
[Urbieta, A.] Univ Complutense Madrid, Dept Fis Mat, E-28040 Madrid, Spain.
RP Grandidier, B (reprint author), CNRS, IEMN, UMR 8520, Dept ISEN,Inst Elect Microelect & Nanotechnol, 41 Bd Vauban, F-59046 Lille, France.
EM bruno.grandidier@isen.fr
RI Erwin, Steven/B-1850-2009; Urbieta, Ana/A-7455-2008
OI Urbieta, Ana/0000-0002-3430-1990
FU US Office of Naval Research
FX This work was supported in part by the US Office of Naval Research.
Computations were performed at the DoD Major Shared Resource Center at
ASC. Conversations with P. Beton are gratefully acknowledged.
NR 22
TC 5
Z9 5
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD JAN 15
PY 2009
VL 603
IS 2
BP 311
EP 314
DI 10.1016/j.susc.2008.11.025
PG 4
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 407SL
UT WOS:000263384500010
ER
PT J
AU Lederman, E
Miramontes, R
Openshaw, J
Olson, VA
Karem, KL
Marcinak, J
Panares, R
Staggs, W
Allen, D
Weber, SG
Vora, S
Gerber, SI
Hughes, CM
Regnery, R
Collins, L
Diaz, PS
Reynolds, MG
Damon, I
AF Lederman, Edith
Miramontes, Roque
Openshaw, John
Olson, Victoria A.
Karem, Kevin L.
Marcinak, John
Panares, Rodrigo
Staggs, Wayne
Allen, Donna
Weber, Stephen G.
Vora, Surabhi
Gerber, Susan I.
Hughes, Christine M.
Regnery, Russell
Collins, Limone
Diaz, Pamela S.
Reynolds, Mary G.
Damon, Inger
TI Eczema vaccinatum resulting from the transmission of vaccinia virus from
a smallpox vaccinee: An investigation of potential fomites in the home
environment
SO VACCINE
LA English
DT Article
DE Smallpox vaccination; Vaccinia virus; Eczema vaccinatum; Environmental
sampling
ID MONKEYPOX-VIRUS; INFECTION; IMMUNITY; ORTHOPOXVIRUS; EFFICACY; CONTACT
AB On March 3, 2007, a 2-year-old boy was hospitalized with eczema vaccinatum. His two siblings, one with eczema, were subsequently removed from the home. Swabs of household items obtained on March 13th were analyzed for orthopoxvirus DNA signatures with real-time PCR. Virus Culture was attempted on positive specimens. Eight of 25 household samples were positive by PCR for orthopoxvirus; of these, three yielded viable vaccinia virus in culture. Both siblings were found to have serologic evidence of orthopoxvirus exposure. These findings have implications for smallpox preparedness, especially in situations where some household members are not candidates for vaccination. Published by Elsevier Ltd.
C1 [Lederman, Edith; Olson, Victoria A.; Karem, Kevin L.; Hughes, Christine M.; Regnery, Russell; Reynolds, Mary G.; Damon, Inger] Ctr Dis Control & Prevent, Div Viral & Rickettsial Dis, Poxvirus & Rabies Branch, Atlanta, GA USA.
[Lederman, Edith; Miramontes, Roque; Openshaw, John] Ctr Dis Control & Prevent, Off Workforce & Dev, Atlanta, GA USA.
[Miramontes, Roque; Diaz, Pamela S.] Ctr Dis Control & Prevent, Div Bioterrorism Preparedness & Response, Epidemiol Surveillance & Response Branch, Atlanta, GA USA.
[Panares, Rodrigo] Hammond City Hlth Dept, Hammond, IN USA.
[Staggs, Wayne; Allen, Donna] Indiana State Dept Hlth, Indianapolis, IN 46202 USA.
[Weber, Stephen G.] Univ Chicago, Infect Dis Sect, Dept Internal Med, Chicago, IL 60637 USA.
[Gerber, Susan I.] Chicago Dept Publ Hlth, Chicago, IL USA.
[Collins, Limone] Walter Reed Army Med Ctr, Vaccine Healthcare Ctr Network, Washington, DC 20307 USA.
RP Lederman, E (reprint author), USN, Med Ctr, Div Infect Dis, 34800 Bob Wilson Dr, San Diego, CA 92134 USA.
EM edith.lederman@med.navy.mil
OI Miramontes, Roque/0000-0001-9535-460X
NR 24
TC 13
Z9 14
U1 0
U2 6
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 JAN 14
PY 2009
VL 27
IS 3
BP 375
EP 377
DI 10.1016/j.vaccine.2008.11.019
PG 3
WC Immunology; Medicine, Research & Experimental
SC Immunology; Research & Experimental Medicine
GA 399DJ
UT WOS:000262780300007
PM 19027813
ER
PT J
AU Mullen, L
Cochenour, B
Rabinovich, W
Mahon, R
Muth, J
AF Mullen, Linda
Cochenour, Brandon
Rabinovich, William
Mahon, Rita
Muth, John
TI Backscatter suppression for underwater modulating retroreflector links
using polarization discrimination
SO APPLIED OPTICS
LA English
DT Article
ID OCEAN WATER; IMPROVEMENT
AB Free space optical links underwater have the potential to enable short range (< 100 m) high-bandwidth (megabits per second) data links that have a low probability of detection and interception. The use of a retroreflecting free space optical link in water has the added advantage of allowing much of the weight and power burden of the link to remain at one end. While modulating retroreflectors have been successfully implemented in above-water links, the underwater environment introduces new challenges. The focus of this paper is to address these challenges and to investigate techniques for minimizing their effect on the link performance. (C) 2009 Optical Society of America
C1 [Mullen, Linda; Cochenour, Brandon] Naval Air Syst Command, NAVAIR, Electroopt & Special Mission Sensors Div, Patuxent River, MD 20670 USA.
[Rabinovich, William; Mahon, Rita] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
[Muth, John] N Carolina State Univ, Dept Elect & Comp Engn, Raleigh, NC 27606 USA.
RP Mullen, L (reprint author), Naval Air Syst Command, NAVAIR, Electroopt & Special Mission Sensors Div, 22347 Cedar Point Rd, Patuxent River, MD 20670 USA.
EM linda.mullen@navy.mil
RI Muth, John/E-9027-2012
OI Muth, John/0000-0002-2488-7721
FU Office of Naval Research (ONR)
FX This work was funded by the Office of Naval Research (ONR).
NR 17
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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 JAN 10
PY 2009
VL 48
IS 2
BP 328
EP 337
DI 10.1364/AO.48.000328
PG 10
WC Optics
SC Optics
GA 402DK
UT WOS:000262994200022
PM 19137044
ER
PT J
AU Chandra, P
Stockdale, CJ
Chevalier, RA
Van Dyk, SD
Ray, A
Kelley, MT
Weiler, KW
Panagia, N
Sramek, RA
AF Chandra, Poonam
Stockdale, Christopher J.
Chevalier, Roger A.
Van Dyk, Schuyler D.
Ray, Alak
Kelley, Matthew T.
Weiler, Kurt W.
Panagia, Nino
Sramek, Richard A.
TI ELEVEN YEARS OF RADIO MONITORING OF THE TYPE IIn SUPERNOVA SN 1995N
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE circumstellar matter; radiation mechanisms: non-thermal; radio
continuum: stars; stars: mass loss; supernovae: individual (SN 1995N)
ID CIRCUMSTELLAR MEDIUM; MASSIVE STAR; EMISSION; ENVELOPE; SN1995N
AB We present radio observations of the optically bright Type IIn supernova SN 1995N. We observed the SN at radio wavelengths with the Very Large Array for 11 years. We also observed it at low radio frequencies with the Giant Metrewave Radio Telescope at various epochs within 6.5-10 years since explosion. Although there are indications of an early optically thick phase, most of the data are in the optically thin regime so it is difficult to distinguish between synchrotron self absorption and free-free absorption (FFA) mechanisms. However, the information from other wavelengths indicates that FFA is the dominant absorption process. Model fits of radio emission with FFA give reasonable physical parameters. Making use of X-ray and optical observations, we derive the physical conditions of the shocked ejecta and the shocked circumstellar matter.
C1 [Chandra, Poonam; Chevalier, Roger A.] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.
[Stockdale, Christopher J.] Marquette Univ, Dept Phys, Milwaukee, WI 53214 USA.
[Van Dyk, Schuyler D.] CALTECH, Spitzer Sci Center, Pasadena, CA 91125 USA.
[Ray, Alak] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
[Kelley, Matthew T.] Univ Nevada, Las Vegas, NV 89154 USA.
[Weiler, Kurt W.] USN, Res Lab, Washington, DC 20375 USA.
[Panagia, Nino] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Panagia, Nino] Osserv Astrofis Catania, INAF, I-95123 Catania, Italy.
[Sramek, Richard A.] Natl Radio Astron Observ, Socorro, NM 87801 USA.
RP Chandra, P (reprint author), Univ Virginia, Dept Astron, POB 400325, Charlottesville, VA 22904 USA.
OI Van Dyk, Schuyler/0000-0001-9038-9950
FU NSF [AST-0807727]; Tata Institute [10P-201, 11P-904]
FX We thank the VLA staff for making radio observations, without which this
work was not possible. For the GMRT observations, we thank the staff of
the GMRT which is run by the National Center for Radio Astrophysics of
the Tata Institute of Fundamental Research (TIFR). We acknowledge the
use of the AIPS, which was developed by the staff of the National Radio
Astronomical Observatory. P. C. is a Jansky fellow at National Radio
Astronomy Observatory. The National Radio Astronomy Observatory is a
facility of the National Science Foundation operated under cooperative
agreement by Associated Universities, Inc. R. A. C. was supported in
part by NSF grant AST-0807727. At the Tata Institute, this research
formed a part of the projects 10P-201 and 11P-904 of the Five Year
Plans.
NR 29
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U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 10
PY 2009
VL 690
IS 2
BP 1839
EP 1846
DI 10.1088/0004-637X/690/2/1839
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 398IX
UT WOS:000262726900067
ER
PT J
AU Htoon, H
Crooker, SA
Furis, M
Jeong, S
Efros, AL
Klimov, VI
AF Htoon, H.
Crooker, S. A.
Furis, M.
Jeong, S.
Efros, Al. L.
Klimov, V. I.
TI Anomalous Circular Polarization of Photoluminescence Spectra of
Individual CdSe Nanocrystals in an Applied Magnetic Field
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SEMICONDUCTOR QUANTUM DOTS; EXCITON FINE-STRUCTURE; EXCHANGE
INTERACTION; SPIN RELAXATION; HEAVY-HOLE; ELECTRON; WELLS; STATES; DARK
AB We study the low-temperature magnetophotoluminescence from individual CdSe nanocrystals. Nanocrystals having a small "bright" exciton fine structure splitting (Delta(XY)< 0.5 meV) exhibit a conventional left and right circularly polarized Zeeman photoluminescence doublet in applied magnetic fields. In contrast, nanocrystals with large Delta(XY) (> 1 meV) show an anomalous magnetophotoluminescence polarization, wherein the lower-energy peak becomes circularly polarized with increasing field, while the higher-energy peak remains linearly polarized. This unusual behavior arises from strong mixing between the absorbing and emitting bright exciton levels due to strong anisotropic exchange interactions.
C1 [Htoon, H.; Jeong, S.; Klimov, V. I.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
[Htoon, H.; Jeong, S.; Klimov, V. I.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
[Crooker, S. A.; Furis, M.] Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
[Efros, Al. L.] USN, Res Lab, Washington, DC 20375 USA.
RP Klimov, VI (reprint author), Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
EM klimov@lanl.gov
RI Furis, Madalina/F-8090-2015;
OI Klimov, Victor/0000-0003-1158-3179; Furis, Madalina/0000-0001-9007-5492;
Htoon, Han/0000-0003-3696-2896; Jeong, Sohee/0000-0002-9863-1374
FU DOE Office of Basic Energy Sciences; Los Alamos LDRD funds; DOE Center
for Integrated Nanotechnologies
FX We thank Anna Trugman for technical assistance. This work was supported
by the DOE Office of Basic Energy Sciences and Los Alamos LDRD funds. V.
I. K. and H. H. acknowledge partial support by the DOE Center for
Integrated Nanotechnologies jointly operated by Los Alamos and Sandia
National Laboratories. Al. L. E acknowledges the support of the ONR.
NR 33
TC 24
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U1 0
U2 28
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JAN 9
PY 2009
VL 102
IS 1
AR 017402
DI 10.1103/PhysRevLett.102.017402
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 393EZ
UT WOS:000262355000070
PM 19257239
ER
PT J
AU Coslovich, D
Roland, CM
AF Coslovich, D.
Roland, C. M.
TI Pressure-energy correlations and thermodynamic scaling in viscous
Lennard-Jones liquids
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE fluctuations; liquid mixtures; liquid structure; molecular dynamics
method; potential energy functions; thermodynamics
ID EQUATION-OF-STATE; MOLECULAR-DYNAMICS; SOFT SPHERES; FLUID; RELAXATION;
DIFFUSION; LANDSCAPE; POLYMERS; MODEL
AB We use molecular dynamics simulation results on viscous binary Lennard-Jones mixtures to examine the correlation between the potential energy and the virial. In accord with a recent proposal [U. R. Pedersen , Phys. Rev. Lett. 100, 015701 (2008)], the fluctuations in the two quantities are found to be strongly correlated, exhibiting a proportionality constant, Gamma, numerically equal to one-third the slope of an inverse power law approximation to the intermolecular potential function. The correlation is stronger at higher densities, where interatomic separations are in the range where the inverse power law approximation is more accurate. These same liquids conform to thermodynamic scaling of their dynamics, with the scaling exponent equal to Gamma. Thus, the properties of strong correlation between energy and pressure and thermodynamic scaling both reflect the ability of an inverse power law representation of the potential to capture interesting features of the dynamics of dense, highly viscous liquids.
C1 [Coslovich, D.] Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria.
[Coslovich, D.] Univ Trieste, Dipartimento Fis Teor, I-34100 Trieste, Italy.
[Roland, C. M.] USN, Res Lab, Washington, DC 20375 USA.
RP Coslovich, D (reprint author), Vienna Univ Technol, Inst Theoret Phys, Wiedner Hauptstr 8-10, A-1040 Vienna, Austria.
EM coslovich@cmt.tuwien.ac.at; roland@nrl.navy.mil
FU Austrian Science Fund (FWF) [P19890-N16]; Office of Naval Research
FX Computational resources were obtained through a grant within the
agreement between the University of Trieste and CINECA (Italy). D.C.
acknowledges financial support by the Austrian Science Fund (FWF)
(Project No. P19890-N16). The work at NRL was supported by the Office of
Naval Research.
NR 34
TC 47
Z9 47
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 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD JAN 7
PY 2009
VL 130
IS 1
AR 014508
DI 10.1063/1.3054635
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 393KQ
UT WOS:000262372600020
PM 19140623
ER
PT J
AU Manna, U
Song, JK
Vij, JK
Naciri, J
AF Manna, U.
Song, Jang-Kun
Vij, J. K.
Naciri, J.
TI Anomalous dependence of response time on the electric field in an
electroclinic liquid crystal with large induced tilt and polarization
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE electric moments; liquid theory; molecular orientation; smectic liquid
crystals
ID SMECTIC-C; ALIGNMENT; DISPLAYS; BEHAVIOR
AB We investigate the response time of an electroclinic liquid crystal with large induced tilt and polarization (de Vries smectic A(*)). The response time is found to increase with the increase in electric field up to a threshold value in contrast with the general case of a decrease with field. This behavior is unusual and contrasts with that observed for a conventional smectic-A(*) phase. The anomalous behavior is explained by the Langevin process of the director reorientation by assuming an increase in the effective dipole moment (mu(eff)) with field. The response time decreases with the increase in temperature in the smectic-A(*) phase. We find the existence of a finite correlation length of a few tens of nm which in both temperature and field dependent.
C1 [Manna, U.; Song, Jang-Kun; Vij, J. K.] Univ Dublin Trinity Coll, Dept Elect & Elect Engn, Dublin 2, Ireland.
[Naciri, J.] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
RP Manna, U (reprint author), Univ Dublin Trinity Coll, Dept Elect & Elect Engn, Dublin 2, Ireland.
EM jvij@tcd.ie
RI Manna, Uttam/B-9112-2009; Manna, Uttam/D-9984-2014;
OI Manna, Uttam/0000-0001-5095-4417; Vij, Jagdish K/0000-0001-7918-126X
FU SFI [02/IN.1/I.031, RFP06/RFP/ENE039]
FX The work was partially funded by SFI (Grant Nos. 02/IN.1/I.031 and
RFP06/RFP/ENE039).
NR 21
TC 2
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U1 1
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 5
PY 2009
VL 94
IS 1
AR 012901
DI 10.1063/1.3049319
PG 3
WC Physics, Applied
SC Physics
GA 393FZ
UT WOS:000262357800061
ER
PT J
AU Hooper, J
Mitchell, E
Konek, C
Wilkinson, J
AF Hooper, J.
Mitchell, E.
Konek, C.
Wilkinson, J.
TI Terahertz optical properties of the high explosive beta-HMX
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID THEORETICAL-ANALYSIS; SPECTROSCOPY; SPECTRUM; RDX; THZ; CHARGES; RANGE;
PETN
AB We have calculated the full dielectric function in the far-infrared for the high explosive beta-HMX using density functional perturbation theory. Complementary time-domain terahertz spectroscopy measurements were performed on military-grade samples of HMX. The calculated absorption coefficient in the range 0.1-3.6 THz is in excellent quantitative agreement with our experimentally determined absorption coefficient in terms of both peak positions and magnitude. Our calculated refractive index below 1 THz is 1.68, very close to our measured value of 1.71. This computational method appears well suited for first-principles calculation of the terahertz optical properties of molecular crystals. Published by Elsevier B. V.
C1 [Hooper, J.; Mitchell, E.; Konek, C.; Wilkinson, J.] USN, Ctr Surface Warfare, Res Dept, Indian Head, MD 20640 USA.
RP Hooper, J (reprint author), USN, Ctr Surface Warfare, Res Dept, 4104 Evans Way,Suite 102, Indian Head, MD 20640 USA.
EM joseph.p.hooper@navy.mil
FU ASEE Naval Research Enterprise Internship; ASEE/NSWC
FX The authors would like to thank S. Caulder and J. Mackey for assistance
in sample preparation, and F. Zerilli for preliminary calculations. This
work was supported by an Independent Research grant from the Office of
Naval Research. E. M. was supported by an ASEE Naval Research Enterprise
Internship. C. K. acknowledges the ASEE/NSWC Postdoctoral Fellowship
program for funding.
NR 27
TC 42
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U1 4
U2 20
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 JAN 5
PY 2009
VL 467
IS 4-6
BP 309
EP 312
DI 10.1016/j.cplett.2008.11.052
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 386VC
UT WOS:000261909700018
ER
PT J
AU Crum-Cianflone, N
Hullsiek, KH
Marconi, V
Weintrob, A
Ganesan, A
Barthel, RV
Fraser, S
Agan, BK
Wegner, S
AF Crum-Cianflone, Nancy
Hullsiek, Katherine Huppler
Marconi, Vincent
Weintrob, Amy
Ganesan, Anuradha
Barthel, R. Vincent
Fraser, Susan
Agan, Brian K.
Wegner, Scott
TI Trends in the incidence of cancers among HIV-infected persons and the
impact of antiretroviral therapy: a 20-year cohort study
SO AIDS
LA English
DT Article
DE cancer; epidemiology; HAART; HIV; malignancy; military
ID ACQUIRED-IMMUNODEFICIENCY-SYNDROME; NONMELANOMA SKIN-CANCER;
AIDS-DEFINING CANCERS; NON-HODGKINS-LYMPHOMA; HUMAN-PAPILLOMAVIRUS;
KAPOSIS-SARCOMA; ERA; INDIVIDUALS; ADULTS; RISK
AB Objective: To describe trends in incidence rates of AIDS-defining cancers (ADCs) and non-AIDS-defining cancers (NADCs) during the HIV epidemic and to evaluate predictors, including the impact of antiretroviral therapy, of cancer development.
Design: Retrospective analysis of a multicenter, prospective natural history study including 4498 HIV-infected US military beneficiaries with 33486 person-years of follow-up.
Methods: Predictors evaluated included demographics, clinical data, time-updated CD4 cell counts, HIV viral loads, and antiretroviral history. Time periods were classified as early pre (1984-1990), late pre (1991 - 1995), early post (1996-2000), and late post (2001 - 2006) HAART eras. Cox proportional hazard models were used to evaluate the association of specific factors with cancer.
Results: Ten percent of HIV-infected persons developed cancer. ADC rates increased between the early and late pre-HAART eras (7.6 and 14.2 cases per 1000 person-years) and have since declined from 5.4 to 2.7 in the early and late HAART eras, respectively (P < 0.001). Rates of NADCs have risen over the four periods (2.9, 2.8, 4.2, 6.7, P=0.0004). During the late HAART era, 71%, of cancers were NADCs. Predictors for ADCs included low CD4 cell count, noncancer AIDS diagnosis, and lack of HAART. NADCs were predicted by increasing age and white race (clue to skin cancers).
Conclusion: Although the rate of ADCs continues to fall, the rate of NADCs is rising and now accounts for the majority of cancers in HIV-infected persons. The development of NADCs is associated with increasing age among HIV patients. HAART use is protective for ADCs, but did not significantly impact NADCs. (C) 2009 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins
C1 [Crum-Cianflone, Nancy] USN, San Diego Med Ctr, Clin Invest Dept KCA, Infect Dis Clin, San Diego, CA 92134 USA.
[Crum-Cianflone, Nancy; Hullsiek, Katherine Huppler; Marconi, Vincent; Weintrob, Amy; Ganesan, Anuradha; Barthel, R. Vincent; Fraser, Susan; Agan, Brian K.; Wegner, Scott] Uniformed Serv Univ Hlth Sci, Infect Dis Clin Res Program, TriServ AIDS Clin Consortium, Bethesda, MD 20814 USA.
[Hullsiek, Katherine Huppler] Univ Minnesota, Div Biostat, Minneapolis, MN USA.
[Marconi, Vincent; Agan, Brian K.] San Antonio Mil Med Ctr, Infect Dis Clin, San Antonio, TX USA.
[Weintrob, Amy] Walter Reed Army Med Ctr, Infect Dis Clin, Washington, DC 20307 USA.
[Ganesan, Anuradha] Natl Naval Med Ctr, Infect Dis Clin, Bethesda, MD USA.
[Barthel, R. Vincent] USN, Med Ctr Portsmouth, Infect Dis Clin, Portsmouth, Hants, England.
[Fraser, Susan] Tripler Army Med Ctr, Infect Dis Clin, Honolulu, HI 96859 USA.
RP Crum-Cianflone, N (reprint author), USN, San Diego Med Ctr, Clin Invest Dept KCA, Infect Dis Clin, 34800 Bob Wilson Dr,Ste 5, San Diego, CA 92134 USA.
EM nancy.crum@med.navy.mil
RI Marconi, Vincent/N-3210-2014;
OI Marconi, Vincent/0000-0001-8409-4689; Agan, Brian/0000-0002-5114-1669
FU NIAID NIH HHS [HU0001-05-2-0011]; PHS HHS [HU0001-05-2-0011]
NR 39
TC 131
Z9 132
U1 2
U2 3
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0269-9370
J9 AIDS
JI Aids
PD JAN 2
PY 2009
VL 23
IS 1
BP 41
EP 50
DI 10.1097/QAD.0b013e328317cc2d
PG 10
WC Immunology; Infectious Diseases; Virology
SC Immunology; Infectious Diseases; Virology
GA 390XS
UT WOS:000262197600007
PM 19050385
ER
PT J
AU Vandenengel, JE
Morse, DP
AF Vandenengel, Jeffrey E.
Morse, Daniel P.
TI Mutational analysis of a signaling aptamer suggests a mechanism for
ligand-triggered structure-switching
SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
LA English
DT Article
DE Aptamer; Structure-switching; In vitro selection; RNA; Mutagenesis;
Mechanism
ID RIBOSOMAL-RNA; SECONDARY STRUCTURE; RIBOSWITCHES; RECOGNITION;
SELECTION; BINDING; COMPLEX
AB Structure-switching signaling aptamers are nucleic acids that change shape upon binding to a specific ligand. Previously, we applied a new in vitro selection strategy to isolate structure-switching RNA aptamers responsive to the aminoglycoside antibiotic tobramycin. Here, we report the results of mutational analysis, secondary structure modeling, and ligand-specificity studies that suggest a mechanism for tobramycin-triggered structure switching. Published by Elsevier Inc.
C1 [Vandenengel, Jeffrey E.; Morse, Daniel P.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
RP Morse, DP (reprint author), USN Acad, Dept Chem, 572M Holloway Rd, Annapolis, MD 21402 USA.
EM morse@usna.edu
FU National Institutes of Health [NS052753]; Office of Naval Research via
the Naval Academy Trident Scholar Program [N0001408WR40063]; US Naval
Academy
FX Thanks to Virginia Smith, Jamie Schlessman, and Shirley Lin for critical
reading of the manuscript. This work was supported by the National
Institutes of Health [NS052753 to D.P.M.]; the Office of Naval Research
via the Naval Academy Trident Scholar Program [N0001408WR40063 to
J.E.V.]; and the Chemistry Department of the US Naval Academy.
NR 18
TC 5
Z9 5
U1 3
U2 14
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0006-291X
J9 BIOCHEM BIOPH RES CO
JI Biochem. Biophys. Res. Commun.
PD JAN 2
PY 2009
VL 378
IS 1
BP 51
EP 56
DI 10.1016/j.bbrc.2008.10.180
PG 6
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 384YJ
UT WOS:000261779800011
PM 19010303
ER
PT S
AU Phlips, BF
Christophersen, M
AF Phlips, Bernard F.
Christophersen, Marc
GP IEEE
TI Curved Radiation Detector
SO 2008 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (2008
NSS/MIC), VOLS 1-9
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium/Medical Imaging Conference
CY OCT 19-25, 2008
CL Dresden, GERMANY
SP IEEE Nucl & Plasma Sci Soc, Natl Nucl Secur Adm, US Def Threat Reduct Agcy, ICx Radiat GmbH, ORTEC, Hamamatsu, European Phys Journal, Hilger Crystals, SAFC Hitech, ATOMTEX, Canberra, SensL, ASP, Brookhaven Natl Lab, CEA, CERN, DESY, Forschungszentrum Julich GmbH, Int Atom Energy Agcy, Lawrence Livermore Natl Lab
ID LINEAR COLLIDER; SILICON SENSORS; LITHOGRAPHY; DESIGN; SHAPE
AB As vertex detectors for smaller for smaller inner beam pipe diameters are required, the planar nature of the detector becomes more and more of a problem. We present a curved silicon vertex detector, whose radius of curvature can be adjusted to the beam pipe. The advantage of these curved detectors over conventional planar ones is twofold: The first advantage is that these detectors are curved to a specific curvature and shaped directly for the specific application (e.g. beam pipe radius), and second, the curvature of the backside is independent from the front surface, which allows thinning of the detector using standard semiconductor processing. Both strip detectors and pixel arrays (with Indium bump bonds) have been realized on the curved topography. The key micro-fabrication technique for curved topography, so called "gray-tone lithography", will be introduced and discussed. We demonstrated low-noise performance by successfully detecting low-energy gamma-rays with a curved strip detector. The energy resolution was similar to 1.73 keV FWHM at 59.5 keV for the pixel detector. There is excellent charge collection at the curved surface. The general fabrication method could also be applied for curved focal plane arrays to improve optical systems.
C1 [Phlips, Bernard F.; Christophersen, Marc] USN, Res Lab, Washington, DC 20375 USA.
RP Phlips, BF (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM bernard.phlips@nrl.navy.mil; marc.christophersen.ctr.gm@nrl.navy.mil
RI Christophersen, Marc/B-6795-2008
FU NRC (National Research Council)
FX This work was supported in part by a NRC (National Research Council)
postdoctoral fellowship for M. Christophersen.
NR 21
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-2714-7
J9 IEEE NUCL SCI CONF R
PY 2009
BP 1475
EP +
PG 3
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA BKN17
UT WOS:000268656000309
ER
PT S
AU Wulf, EA
Phlips, BF
Johnson, WN
Leas, B
Mitchell, LJ
AF Wulf, Eric A.
Phlips, Bernard F.
Johnson, W. Neil
Leas, Byron
Mitchell, Lee J.
GP IEEE
TI MISTI Imaging and Source Localization
SO 2008 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (2008
NSS/MIC), VOLS 1-9
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium/Medical Imaging Conference
CY OCT 19-25, 2008
CL Dresden, GERMANY
SP IEEE Nucl & Plasma Sci Soc, Natl Nucl Secur Adm, US Def Threat Reduct Agcy, ICx Radiat GmbH, ORTEC, Hamamatsu, European Phys Journal, Hilger Crystals, SAFC Hitech, ATOMTEX, Canberra, SensL, ASP, Brookhaven Natl Lab, CEA, CERN, DESY, Forschungszentrum Julich GmbH, Int Atom Energy Agcy, Lawrence Livermore Natl Lab
ID RAY
AB MISTI (Mobile Imaging and Spectroscopic Threat Identification) provides both excellent gamma-ray spectroscopic and imaging capabilities to maximize the detection sensitivity of localized sources while at the same time minimizing the false alarm rate. The truck-based instrument is currently under construction and will detect and locate, in both position and range, a 1 MCi (CS)-C-137 at 100 m in 20 s with typical background levels. This performance is achieved using a hybrid system that combines the superb spectroscopic capabilities of germanium detectors for sensitive detection with the large collecting power available using scintillation detectors for producing gamma-ray images. Once an isotope of interest is detected by the germanium system, the NaI imager generates gamma-ray images for that energy that are overlaid based on the truck location at the time of acquisition. The overlayed images are calculated at a number of distance from the truck and the location and range of the source is determined by locating the reconstructed position and range with the maximum flux. The fully coded field of view, where all detectors contribute to the image, covers 92 degrees x 29 degrees using 9 x 3 pixels with the larger coverage in the horizontal direction.
C1 [Wulf, Eric A.; Phlips, Bernard F.; Johnson, W. Neil] USN, Res Lab, Washington, DC 20375 USA.
[Leas, Byron] SRA Int, Fairfax, VA 22033 USA.
[Mitchell, Lee J.] NRL, Washington, DC 20375 USA.
RP Wulf, EA (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM wulf@nrl.navy.mil
RI Wulf, Eric/B-1240-2012; Johnson, Neil/G-3309-2014
NR 4
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-2714-7
J9 IEEE NUCL SCI CONF R
PY 2009
BP 1688
EP +
PG 3
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA BKN17
UT WOS:000268656000356
ER
PT S
AU Christophersen, M
Phlips, BF
AF Christophersen, Marc
Phlips, Bernard F.
GP IEEE
TI Thick Silicon Drift Detectors
SO 2008 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (2008
NSS/MIC), VOLS 1-9
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium/Medical Imaging Conference
CY OCT 19-25, 2008
CL Dresden, GERMANY
SP IEEE Nucl & Plasma Sci Soc, Natl Nucl Secur Adm, US Def Threat Reduct Agcy, ICx Radiat GmbH, ORTEC, Hamamatsu, European Phys Journal, Hilger Crystals, SAFC Hitech, ATOMTEX, Canberra, SensL, ASP, Brookhaven Natl Lab, CEA, CERN, DESY, Forschungszentrum Julich GmbH, Int Atom Energy Agcy, Lawrence Livermore Natl Lab
ID SIMULATION; DEVICE; DESIGN; 3D
AB A new concept of silicon drift detector is presented that potentially allows much thicker devices. The detector is based on a trench array, which penetrate the bulk with different depths. Finite element (FEM) simulations of the detector structure will be presented and discussed. The key micro-fabrication technique for different depth trenches, so called "gray-tone lithography", will be introduced and discussed in a feasibility study.
C1 [Christophersen, Marc] USN, Res Lab, NRC Postdoc, Washington, DC 20375 USA.
[Phlips, Bernard F.] Naval Res Lab, Washington, DC 20375 USA.
RP Christophersen, M (reprint author), USN, Res Lab, NRC Postdoc, Washington, DC 20375 USA.
EM marc.christophersen.ctr.gm@nrl.navy.mil; bernard.phlips@nrl.navy.mil
RI Christophersen, Marc/B-6795-2008
FU NRC (National Research Council)
FX This work was supported in part by a NRC (National Research Council)
postdoctoral fellowship for M.Christophersen.
NR 16
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-2714-7
J9 IEEE NUCL SCI CONF R
PY 2009
BP 2002
EP +
PG 2
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA BKN17
UT WOS:000268656001027
ER
PT S
AU Gwon, CS
Novikova, EI
Phlips, BF
Strickman, MS
AF Gwon, Chul S.
Novikova, Elena I.
Phlips, Bernard F.
Strickman, Mark S.
GP IEEE
TI SMART (Simulation of MAritime Radiological Threats)
SO 2008 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (2008
NSS/MIC), VOLS 1-9
SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium/Medical Imaging Conference
CY OCT 19-25, 2008
CL Dresden, GERMANY
SP IEEE Nucl & Plasma Sci Soc, Natl Nucl Secur Adm, US Def Threat Reduct Agcy, ICx Radiat GmbH, ORTEC, Hamamatsu, European Phys Journal, Hilger Crystals, SAFC Hitech, ATOMTEX, Canberra, SensL, ASP, Brookhaven Natl Lab, CEA, CERN, DESY, Forschungszentrum Julich GmbH, Int Atom Energy Agcy, Lawrence Livermore Natl Lab
AB SMART (Simulation of MAritime Radiological Threats) is a package created for simplyfing the process of modeling the performance of detector systems for identifying special nuclear materials (SNM). It consists of a library of spectra, including evaluation benchmarks produced for these SNMs as well as naturally occurring radioactive materials (NORM), a graphical front end system for setting up simulations with GEANT4 or MCNPX, and analysis tools for retrieving spectra plots from the detector, as well as imaging for Compton and Coded Mask spectrometers.
C1 [Gwon, Chul S.; Novikova, Elena I.; Phlips, Bernard F.; Strickman, Mark S.] USN, Res Lab, Washington, DC 20375 USA.
RP Gwon, CS (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM chul.gwon@nrl.navy.mil; novikova@nrl.navy.mil; phlips@nrl.navy.mil;
strickman@nrl.navy.mil
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-2714-7
J9 IEEE NUCL SCI CONF R
PY 2009
BP 2769
EP 2771
PG 3
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA BKN17
UT WOS:000268656001177
ER
PT S
AU Christophersen, M
Phlips, BF
Kub, FJ
AF Christophersen, Marc
Phlips, Bernard F.
Kub, Francis J.
GP IEEE
TI Trenched Gamma-Ray Detector
SO 2008 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (2008
NSS/MIC), VOLS 1-9
SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium/Medical Imaging Conference
CY OCT 19-25, 2008
CL Dresden, GERMANY
SP IEEE Nucl & Plasma Sci Soc, Natl Nucl Secur Adm, US Def Threat Reduct Agcy, ICx Radiat GmbH, ORTEC, Hamamatsu, European Phys Journal, Hilger Crystals, SAFC Hitech, ATOMTEX, Canberra, SensL, ASP, Brookhaven Natl Lab, CEA, CERN, DESY, Forschungszentrum Julich GmbH, Int Atom Energy Agcy, Lawrence Livermore Natl Lab
ID 3D
AB 3-D detectors were first introduced by S. Parker et al. as radiation-hard detectors. We present 3-D detectors for use as thick gamma-ray detectors. Current room-temperature gamma-ray detectors are built in planar device architecture. We use micro-machining techniques to introduce vertical electrodes, which allow lateral charge collection, decoupling thickness and charge collection properties. The ultimate goal is the ability to form cm thick room-temperature gamma-ray detectors. The vertical electrodes are micro-machined trenches with depth up to 1.7 mm in silicon. We present the basic detector structure, SILVACO simulations, and first radiation measurements. An energy resolution of 2.3 keV FWHM at 59.5 keV was obtained. This is evidence of excellent charge collection from the trenches.
C1 [Christophersen, Marc; Phlips, Bernard F.; Kub, Francis J.] USN, Res Lab, Washington, DC 20375 USA.
RP Christophersen, M (reprint author), USN, Res Lab, Code 7651, Washington, DC 20375 USA.
EM marc.christophersen.ctr.gm@nrl.navy.mil; bernard.phlips@nrl.navy.mil;
fritz.kub@nrl.navy.mil
RI Christophersen, Marc/B-6795-2008
NR 7
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-2714-7
J9 IEEE NUCL SCI CONF R
PY 2009
BP 2783
EP 2787
PG 5
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA BKN17
UT WOS:000268656001182
ER
PT S
AU Krawczynski, H
Garson, A
Li, Q
Beilicke, M
Dowkontt, P
Wulf, E
Kurfess, J
Novikova, E
De Geronimo, G
Baring, MG
Harding, AK
Grindlay, J
Hong, JS
AF Krawczynski, H.
Garson, A., III
Li, Q.
Beilicke, M.
Dowkontt, P.
Wulf, E.
Kurfess, J.
Novikova, E.
De Geronimo, G.
Baring, M. G.
Harding, A. K.
Grindlay, J.
Hong, J. S.
GP IEEE
TI HX-POL - A Balloon-Bome Hard X-Ray Polarimeter
SO 2008 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (2008
NSS/MIC), VOLS 1-9
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium/Medical Imaging Conference
CY OCT 19-25, 2008
CL Dresden, GERMANY
SP IEEE Nucl & Plasma Sci Soc, Natl Nucl Secur Adm, US Def Threat Reduct Agcy, ICx Radiat GmbH, ORTEC, Hamamatsu, European Phys Journal, Hilger Crystals, SAFC Hitech, ATOMTEX, Canberra, SensL, ASP, Brookhaven Natl Lab, CEA, CERN, DESY, Forschungszentrum Julich GmbH, Int Atom Energy Agcy, Lawrence Livermore Natl Lab
ID CMOS; PULSARS; POLARIZATION; AMPLIFIERS; PROSPECTS
AB We report on the conceptual design and estimated performance of a balloon-borne hard X-ray polarimeter called HX-POL. The experiment uses a combination of Si and Cadmium Zinc Telluride detectors to measure the polarization of 50 keV-500 keV X-rays from cosmic sources through the dependence of the angular distribution of Compton scattered photons on the polarization direction. On a one-day balloon flight, HX-POL would allow us to measure the polarization of strong Crab-like sources for polarization degrees down to 5%. On a longer (15-30 day) flight from Australia or Antarctica, HX-POL would be be able to measure the polarization of strong sources down to polarization degrees of 1%. Hard X-ray polarization measurements provide unique venues for the study of particle acceleration processes by compact objects. In this contribution, we discuss the overall instrument design and performance. Furthermore, we present results from laboratory tests of the Si and CZT detectors.
C1 [Krawczynski, H.; Garson, A., III; Li, Q.; Beilicke, M.; Dowkontt, P.] Washington Univ, St Louis, MO 63130 USA.
[Wulf, E.; Novikova, E.] Naval Res Lab, High Energy Space Environm Branch, Washington, DC 20375 USA.
[De Geronimo, G.] Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA.
[Baring, M. G.] Rice Univ, Dept Phys & Astron, Houston, TX 77001 USA.
[Harding, A. K.] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20770 USA.
[Grindlay, J.; Hong, J. S.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Krawczynski, H (reprint author), Washington Univ, St Louis, MO 63130 USA.
EM krawcz@wuphys.wustl.edu
RI Wulf, Eric/B-1240-2012; Harding, Alice/D-3160-2012
FU NASA [NNX07AH37G]
FX Manuscript received November 15, 2008; revised July 29, 2009. Current
version published December 09, 2009. The work of the Washington
University group was supported by NASA under Grant NNX07AH37G.
NR 38
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-2714-7
J9 IEEE NUCL SCI CONF R
PY 2009
BP 4918
EP +
PG 3
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA BKN17
UT WOS:000268656002235
ER
PT B
AU Stairs, IH
Kramer, M
Backer, DC
Bailes, M
Cordes, JM
Johnston, S
Kaspi, VM
Lazio, TJW
Ransom, SM
Stappers, BW
AF Stairs, I. H.
Kramer, M.
Backer, D. C.
Bailes, M.
Cordes, J. M.
Johnston, S.
Kaspi, V. M.
Lazio, T. J. W.
Ransom, S. M.
Stappers, B. W.
GP IEEE
TI Gravitational Science with Pulsars and the Square Kilometre Array
SO 2009 13TH INTERNATIONAL SYMPOSIUM ON ANTENNA TECHNOLOGY AND APPLIED
ELECTROMAGNETICS AND THE CANADIAN RADIO SCIENCES MEETING (ANTEM/URSI
2009)
LA English
DT Proceedings Paper
CT 13th International Symposium on Antenna Technology and Applied
Electromagnetics/Canadian Radio Science Meeting
CY FEB 15-18, 2009
CL Univ Calgary, Banff, CANADA
SP IEEE
HO Univ Calgary
ID TESTS
AB Pulsar observations form one of the Key Science Projects for the Square Kilometre Array. These will allow unique tests of General Relativity based on finding and timing pulsars in relativistic binaries and on timing millisecond pulsars distributed across the sky in an effort to detect a background of gravitational radiation.
C1 [Stairs, I. H.] Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada.
[Stairs, I. H.; Johnston, S.] Australia Telescope Natl Facil, CSIRO, Epping, NSW 1710, Australia.
[Kramer, M.; Stappers, B. W.] Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England.
[Backer, D. C.] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
[Bailes, M.] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia.
[Cordes, J. M.] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA.
[Kaspi, V. M.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
[Lazio, T. J. W.] Naval Res Lab, Washington, DC 20375 USA.
[Ransom, S. M.] Natl Radio Astron Observ, Charlottesville, VA 22903 USA.
RP Stairs, IH (reprint author), Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada.
EM stairs@astro.ubc.ca
FU NSERC; CFI; NSF [AST 0507807, AST 0507747]; CISE/RI [040330]; Center for
Advanced Computing; NAIC; CIfAR; FQRNT; NRL
FX Pulsar research at UBC is supported by NSERC and the CFI. IHS is
currently a Distinguished Visitor at the ATNF. Pulsar research at U.C.
Berkeley is supported by NSF grant AST 0507807. Pulsar research at
Cornell is supported by NSF grants AST 0507747 and CISE/RI 040330, by
the Center for Advanced Computing and by NAIC, which operates the
Arecibo Observatory under a cooperative agreement with the NSF. VMK
holds a Canada Research Chair and the Lorne Trottier Chair and
acknowledges support from an NSERC Discovery Grant,CIfAR, FQRNT and the
CFI. Basic research in radio astronomy at the NRL is supported by 6.1
Base funding.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2979-0
PY 2009
BP 306
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied;
Telecommunications
SC Engineering; Physics; Telecommunications
GA BJX56
UT WOS:000267360100077
ER
PT B
AU Xiong, C
Magi, E
Luan, F
Dekker, S
Sanghera, JS
Shaw, LB
Aggarwal, ID
Eggleton, BJ
AF Xiong, C.
Magi, E.
Luan, F.
Dekker, S.
Sanghera, J. S.
Shaw, L. B.
Aggarwal, I. D.
Eggleton, B. J.
GP IEEE
TI Raman Response in Chalcogenide As2S3 fiber
SO 2009 14TH OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC 2009)
LA English
DT Proceedings Paper
CT 14th OptoElectronics and Communications Conference
CY JUL 13-17, 2009
CL Hong Kong, PEOPLES R CHINA
ID SUPERCONTINUUM GENERATION; GAIN
AB We experimentally measure Raman gain spectrum for As2S3 single mode fiber through cross-phase modulation techgniue. We extract the Raman response funtion from the Roman gain spectrum and the polarization dependence.
C1 [Xiong, C.; Magi, E.; Luan, F.; Dekker, S.; Eggleton, B. J.] Univ Sydney, Sch Phys, Inst Photon & Opt Sci IPOS, Ctr Ultrahigh Bandwidth Devices Opt Syst CUDOS, Sydney, NSW 2006, Australia.
[Sanghera, J. S.; Shaw, L. B.; Aggarwal, I. D.] Naval Res Lab, Washington, DC 20375 USA.
RP Xiong, C (reprint author), Univ Sydney, Sch Phys, Inst Photon & Opt Sci IPOS, Ctr Ultrahigh Bandwidth Devices Opt Syst CUDOS, Sydney, NSW 2006, Australia.
EM chunle@physics.usyd.edu.au
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4102-0
PY 2009
BP 536
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BTX08
UT WOS:000288349700267
ER
PT B
AU Arms, SW
Galbreath, JH
Townsend, CP
Churchill, DL
Corneau, B
Ketcham, RP
Phan, N
AF Arms, S. W.
Galbreath, J. H.
Townsend, C. P.
Churchill, D. L.
Corneau, B.
Ketcham, R. P.
Phan, Nam
GP IEEE
TI Energy Harvesting Wireless Sensors and Networked Timing Synchronization
for Aircraft Structural Health Monitoring
SO 2009 1ST INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATION, VEHICULAR
TECHNOLOGY, INFORMATION THEORY AND AEROSPACE & ELECTRONIC SYSTEMS
TECHNOLOGY, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 1st International Conference on Wireless Communication, Vehicular
Technology, Information Theory and Aerospace and Electronic Systems
Technology
CY MAY 17-20, 2009
CL Aalborg, DENMARK
DE wireless; network; strain; sensing; energy harvesting; time
synchronization
AB Energy harvesting, combined with wireless sensors, could greatly improve our ability to monitor and maintain critical structures. This paper reports on the development of an integrated structural health monitoring and reporting (SHMR) system for use on Navy aircraft. Our goal was to develop and test a versatile, fully programmable SHMR system, designed to synchronize and record data from a range of wireless and hard wired sensor networks. Wireless sensors included strain gauges, accelerometers, and thermocouples. Hard-wired sensors included gyroscopes, accelerometers, and magnetometers. Data from an embedded Global Positioning System (GPS) provided position, velocity, and precise timing information.
These data were collected at multiple sampling rates and time stamped and aggregated within a single scalable database on a base station, termed the wireless sensor data aggregator (WSDA). The WSDA, in addition to providing a central location for collecting wireless (star) and wired network sensor data, also provided a beaconing capability to synchronize each sensor node's embedded precision timekeepers.
For flight tests that require a synchronization of sensor data to sub-millisecond accuracies, and with exposure to extreme temperatures, a synchronization beacon should be sent every 5 minutes. Wireless node network synchronization response time, after receipt of a centrally broadcast network command, such as to initiate node sampling, or to synchronize node clocks, was measured at +/- 4 microseconds. Therefore, the system is capable of supporting both burst and periodic sampling modes, with accurate wireless network timing synchronization.
C1 [Arms, S. W.; Galbreath, J. H.; Townsend, C. P.; Churchill, D. L.; Corneau, B.; Ketcham, R. P.] MicroStrain Inc, Williston, VT USA.
[Phan, Nam] Naval Air Sys Command, NAVAIR, Rotary Wing US Navy, Patrol Aircraft Branch, Lexington, MD USA.
RP Arms, SW (reprint author), MicroStrain Inc, Williston, VT USA.
EM swarms@microstrain.com
NR 10
TC 3
Z9 3
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4066-5
PY 2009
BP 16
EP +
DI 10.1109/WIRELESSVITAE.2009.5172414
PG 2
WC Computer Science, Interdisciplinary Applications; Computer Science,
Theory & Methods; Engineering, Electrical & Electronic;
Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BOD19
UT WOS:000276233900004
ER
PT S
AU Zhang, QC
Burk, A
Husna, F
Callanan, R
Agarwal, A
Palmour, J
Stahlbush, R
Scozzie, C
AF Zhang, Qingchun (Jon)
Burk, Al
Husna, Fatima
Callanan, Robert
Agarwal, Anant
Palmour, John
Stahlbush, Robert
Scozzie, Charles
GP IEEE
TI 4H-SiC Bipolar Junction Transistors: From Research to Development - A
Case Study: 1200 V, 20 A, Stable SiC BJTs with High Blocking Yield
SO 2009 21ST INTERNATIONAL SYMPOSIUM ON POWER SEMICONDUCTOR DEVICES & ICS
SE Proceedings of the International Symposium on Power Semiconductor
Devices & ICs
LA English
DT Proceedings Paper
CT 21st International Symposium on Power Semiconductor Devices & ICs
CY JUN 14-18, 2009
CL Barcelona, SPAIN
SP IEEE Electron Devices Soc, IEEE Power Elect Soc, IEEJ, CSIC, Ctr Nacl Microelect, IMB, Gen Catalunya, Minist Ciencia & Innovac
AB In this paper, for the first time, large area SiC BJTs were fabricated on SiC wafers with reduced Basal Plane Dislocations (BPDs). We have demonstrated: (1) stable performance on 1200 V, 20 A SiC BJTs after long duration of electrical stress at 2 different current densities up to 150 A/cm(2); (2) a blocking yield of >80% with low leakage current (<20 nA at 1800 V) on 3 '' wafers along with current gains in a range of 35-40. Both breakthroughs highlight the possibility for SiC BJTs to be commercialized and utilized in power electronics.
C1 [Zhang, Qingchun (Jon); Burk, Al; Husna, Fatima; Callanan, Robert; Agarwal, Anant; Palmour, John] Cree Inc, 3026 E Cornwallis Rd, Res Triangle Pk, NC 27709 USA.
[Stahlbush, Robert] US Navy, Res Lab, Washington, DC 20375 USA.
[Scozzie, Charles] US Army, Res Lab, Adelphi, MD 20783 USA.
RP Zhang, QC (reprint author), Cree Inc, 3026 E Cornwallis Rd, Res Triangle Pk, NC 27709 USA.
EM Jon_Zhang@cree.com
FU Army Research Laboratory, Adelphi, Maryland
FX The authors would like to acknowledge the funding support from Army
Research Laboratory, Adelphi, Maryland. The authors are grateful to Dr.
Peter Muzykov and Prof. T. S. Sudarshan at University of South Carolina
for EBIC measurements.
NR 6
TC 12
Z9 12
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1063-6854
BN 978-1-4244-3525-8
J9 PROC INT SYMP POWER
PY 2009
BP 339
EP +
PG 2
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BNP83
UT WOS:000275190100086
ER
PT B
AU Gentile, CA
Blanchard, WR
Kozub, T
Priniski, C
Zatz, I
Obenschain, S
AF Gentile, C. A.
Blanchard, W. R.
Kozub, T.
Priniski, C.
Zatz, I.
Obenschain, S.
GP IEEE
TI Conceptual Engineering Method for Attenuating He Ion Interactions on
First Wall Components in the Fusion Test Facility (FTF) Employing a
Low-Pressure Noble Gas
SO 2009 23RD IEEE/NPSS SYMPOSIUM ON FUSION ENGINEERING
LA English
DT Proceedings Paper
CT 23rd IEEE/NPSS Symposium on Fusion Engineering
CY MAY 31-JUN 05, 2009
CL San Diego, CA
SP IEEE, NPSS
DE Laser Fusion; Direct Drive; First Wall; Shield Gas
AB It has been shown that post detonation energetic helium ions can drastically reduce the useful life of the (dry) first wall of an IFE reactor due to the accumulation of implanted helium. For the purpose of attenuating energetic helium ions from interacting with first wall components in the Fusion Test Facility (FTF) target chamber, several concepts have been advanced. These include magnetic intervention (MI), deployment of a dynamically moving first wall, use of a sacrificial shroud, designing the target chamber large enough to mitigate the damage caused by He ions on the target chamber wall, and the use of a low pressure noble gas resident in the target chamber during pulse power operations. It is proposed that employing a low-pressure (similar to 1 torr equivalent) noble gas in the target chamber will thermalize energetic helium ions prior to interaction with the wall. The principle benefit of this concept is the simplicity of the design and the utilization of (modified) existing technologies for pumping and processing the noble ambient gas. Although the gas load in the system would be increased over other proposed methods, the use of a "gas shield" may provide a cost effective method of greatly extending the first wall of the target chamber. An engineering study has been initiated to investigate conceptual engineering methods for implementing a viable gas shield strategy in the FTF.
C1 [Gentile, C. A.; Blanchard, W. R.; Kozub, T.; Priniski, C.; Zatz, I.] Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
[Obenschain, S.] Naval Res Lab, Washington, DC 20375 USA.
RP Gentile, CA (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2635-5
PY 2009
BP 377
EP +
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOD16
UT WOS:000276231200089
ER
PT B
AU Crainiceanu, A
Liang, KY
Crainiceanu, CM
AF Crainiceanu, Adina
Liang, Kung-Yee
Crainiceanu, Ciprian M.
GP IEEE
TI Bootstrap Bayesian Analysis with Applications to Gene-Environment
Interaction
SO 2009 24TH INTERNATIONAL SYMPOSIUM ON COMPUTER AND INFORMATION SCIENCES
LA English
DT Proceedings Paper
CT 24th International Symposium on Computer and Information Sciences
CY SEP 14-16, 2009
CL Guzelyurt, CYPRUS
SP Middle E Tech Univ
ID LINKAGE ANALYSIS; ASSOCIATION; EPIDEMIOLOGY; DISEASE; VALUES; LOCI
AB We propose a novel statistical model and inferential algorithm for gene environment interaction. Our methodology was motivated by and applied to identity by descent (IBD) sharing for sibling pairs affected by schizophrenia. Our analysis confirms some of the previous findings on the same data set, e.g. the estimated location of the disease gene and the existence of the interaction between the location of disease gene and environment. Our analysis also provides new insights by better accounting for overall variability in the data. We show that taking into account sampling variability may increase the length of posterior credible intervals for the true location of the disease gene by as much as 140%. Moreover, the posterior distribution is shown to be non-Gaussian, which more closely matches the data.
C1 [Crainiceanu, Adina] USN Acad, Annapolis, MD 21402 USA.
[Liang, Kung-Yee; Crainiceanu, Ciprian M.] Johns Hopkins Univ, Baltimore, MD 21205 USA.
RP Crainiceanu, A (reprint author), USN Acad, Annapolis, MD 21402 USA.
EM adina@usna.edu; kyliang@jhsph.edu; ccrainic@jhsph.edu
FU National Institutes of Health [HL090577]; National Institute Of
Neurological Disorders And Stroke [R01NS060910]
FX This research was supported in part by grant HL090577 from the National
Institutes of Health, and R01NS060910 from the National Institute Of
Neurological Disorders And Stroke
NR 26
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5021-3
PY 2009
BP 649
EP +
PG 2
WC Computer Science, Information Systems; Computer Science, Theory &
Methods
SC Computer Science
GA BNN02
UT WOS:000275024200115
ER
PT S
AU Cress, CD
Hubbard, SM
Maximenko, SI
Bailey, CG
Forbes, DV
Raffaelle, RP
Twigg, ME
Walters, RJ
AF Cress, Cory D.
Hubbard, Seth M.
Maximenko, Serguei I.
Bailey, Chris G.
Forbes, David V.
Raffaelle, Ryne P.
Twigg, Mark E.
Walters, Robert J.
GP IEEE
TI ANALYSIS OF STRAIN COMPENSATED GaAs-BASED In As QD SOLAR CELLS
SO 2009 34TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE, VOLS 1-3
SE IEEE Photovoltaic Specialists Conference
LA English
DT Proceedings Paper
CT 34th IEEE Photovoltaic Specialists Conference
CY JUN 07-12, 2009
CL Philadelphia, PA
SP IEEE Electron Devices Soc, IEEE Photon Soc
AB A suite of characterization techniques including electron beam induced current and cross-sectional transmission electron microscopy in cooperation with current voltage and external quantum efficiency solar measurements are used to analyze the effects of incorporating strain-compensating layers in GaAs-based In As quantum dot solar cells. The data indicate that strain compensation layers can reduce defect densities and increase device performance.
C1 [Cress, Cory D.; Maximenko, Serguei I.; Twigg, Mark E.; Walters, Robert J.] USN, Div Elect Sci & Technol, Res Lab, Washington, DC USA.
RP Cress, CD (reprint author), USN, Div Elect Sci & Technol, Res Lab, Washington, DC USA.
RI Cress, Cory/A-8673-2009
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0160-8371
BN 978-1-4244-2949-3
J9 IEEE PHOT SPEC CONF
PY 2009
BP 1222
EP +
PG 3
WC Energy & Fuels
SC Energy & Fuels
GA BPY40
UT WOS:000280345900266
ER
PT S
AU Chen, XJ
Barnaby, HJ
Warner, JH
Messenger, SR
Walters, RJ
Ringel, SA
Park, J
AF Chen, Xiao Jie
Barnaby, Hugh J.
Warner, Jeffery H.
Messenger, Scott R.
Walters, Robert J.
Ringel, Steven A.
Park, Jeongho
GP IEEE
TI NON-LINEAR BEHAVIORS OF DARK CURRENT SLOPE IN P+N GaAs SOLAR CELLS
FOLLOWING PROTON IRRADIATIONS
SO 2009 34TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE, VOLS 1-3
SE IEEE Photovoltaic Specialists Conference
LA English
DT Proceedings Paper
CT 34th IEEE Photovoltaic Specialists Conference
CY JUN 07-12, 2009
CL Philadelphia, PA
SP IEEE Electron Devices Soc, IEEE Photon Soc
ID DISPLACEMENT DAMAGE
AB In this paper, the dark current responses of p(+)n GaAs solar cells are measured before and after 2MeV proton irradiations. The responses indicate that the dark current slope is not only a function of applied forward bias, but changes with proton fluence. The change in the dark current slope behavior can be modeled by Shockley-Reed-Hall (SRH) recombination statistics as a buildup of bulk traps in the space charge region having Energies away from the mid-gap level. The model also suggest that the energy of proton-induced bulk traps is a signature of radiation type but not the particle fluence.
C1 [Chen, Xiao Jie; Barnaby, Hugh J.] Arizona State Univ, Tempe, AZ 85287 USA.
[Warner, Jeffery H.; Messenger, Scott R.; Walters, Robert J.] US Naval Res Lab, Washington, DC 20375 USA.
[Ringel, Steven A.; Park, Jeongho] Ohio State Univ, Columbus, OH 43210 USA.
RP Chen, XJ (reprint author), Arizona State Univ, Tempe, AZ 85287 USA.
NR 9
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0160-8371
BN 978-1-4244-2949-3
J9 IEEE PHOT SPEC CONF
PY 2009
BP 1532
EP +
PG 2
WC Energy & Fuels
SC Energy & Fuels
GA BPY40
UT WOS:000280345900332
ER
PT S
AU Tsutagawa, MH
Michael, S
AF Tsutagawa, Michael H.
Michael, Sherif
GP IEEE
TI TRIPLE JUNCTION INGAP/GAAS/GE SOLAR CELL OPTIMIZATION: THE DESIGN
PARAMETERS FOR A 36.2% EFFICIENT SPACE CELL USING SILVACO ATLAS MODELING
& SIMULATION
SO 2009 34TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE, VOLS 1-3
SE IEEE Photovoltaic Specialists Conference
LA English
DT Proceedings Paper
CT 34th IEEE Photovoltaic Specialists Conference
CY JUN 07-12, 2009
CL Philadelphia, PA
SP IEEE Electron Devices Soc, IEEE Photon Soc
AB This paper presents the design parameters for a triple junction InGaP/GaAs/Ge space solar cell with a simulated maximum efficiency of 36.28% using Silvaco ATLAS Virtual Wafer Fabrication tool. Design parameters include the layer material, doping concentration, and thicknesses. An initial dual junction InGaP/GaAs model of a known Japanese solar cell was constructed in Silvaco ATLAS to an accuracy of less than 2% with known experimental V(oc) and J(sc) performance results, validating the use of computer modeling to accurately predict solar cell performance. Once confidence of the model's meshing, material property statements, model statements, light file, and numerical methods were established, only the layer doping concentration levels and thicknesses were modified in order to improve the cell's power out efficiency. Simulations of the dual junction cell began by first changing only the doping concentrations and thicknesses to the values obtained from previous work using a genetic algorithm which showed a 0.6% increase in efficiency. Further improvements to the genetic algorithm design parameters showed an overall increase of 0.83% efficiency. Next, a triple junction InGaP/GaAs/Ge cell was modeled by adding a Ge layer to the validated dual junction InGaP/GaAs model. (The triple junction model could not be validated due to lack of published experimental data.) Applying the same process showed increased power output for the triple junction cell. The additional improvement to the genetic algorithm design parameters was principally based on the knowledge that the top InGaP layer is the current limiting layer. Hence, the top layer thickness was maximized until middle and bottom layer shadowing effects began to decrease power output. Over 250 simulations were performed and recorded. Maximum doping. concentrations used real world limitations of 5e19 cm(-3) for InGaP and GaAs and 3e18 cm(-3) for Ge for all simulations. This process produced the design parameters for a 36.28% efficient triple junction solar cell. A provisional patent has been filed for this design.
C1 [Tsutagawa, Michael H.; Michael, Sherif] USN, Postgrad Sch, Dept Elect & Comp Engn, Space Syst Acad Grp, Monterey, CA 93943 USA.
RP Tsutagawa, MH (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, Space Syst Acad Grp, Monterey, CA 93943 USA.
EM mhtsutaq@nps.edu
NR 4
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0160-8371
BN 978-1-4244-2949-3
J9 IEEE PHOT SPEC CONF
PY 2009
BP 1602
EP 1605
PG 4
WC Energy & Fuels
SC Energy & Fuels
GA BPY40
UT WOS:000280345900348
ER
PT S
AU Jenkins, P
Krasowski, M
Prokop, N
Walters, R
Spina, D
Eskenazi, M
Skalitzky, R
Duffey, T
Davis, B
Koss, S
Messenger, S
Downard, E
Crist, K
O'Neill, M
Fu, B
Bentz, D
AF Jenkins, Phillip
Krasowski, Michael
Prokop, Norman
Walters, Robert
Spina, Dan
Eskenazi, Michael
Skalitzky, Robert
Duffey, Timothy
Davis, Brian
Koss, Stephen
Messenger, Scott
Downard, Eric
Crist, Kevin
O'Neill, Mark
Fu, Bruce
Bentz, Doug
GP IEEE
TI TACSAT-4 SOLAR CELL EXPERIMENT: ADVANCED SOLAR CELL TECHNOLOGIES IN A
HIGH RADIATION ENVIRONMENT
SO 2009 34TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE, VOLS 1-3
SE IEEE Photovoltaic Specialists Conference
LA English
DT Proceedings Paper
CT 34th IEEE Photovoltaic Specialists Conference
CY JUN 07-12, 2009
CL Philadelphia, PA
SP IEEE Electron Devices Soc, IEEE Photon Soc
AB The TACSAT-4 Solar Cell Experiment will measure the current and voltage characteristics of advanced EMCORE BTJM solar cells thinned to 100 microns and ATJM cells under an 8.5X ENTECH Stretched Lens. TACSAT-4 will fly in a highly elliptical orbit, passing through the electron and proton belts every six hours. This orbit is expected to induce a 25% power reduction in one year due to radiation damage. In addition to demonstrating these new technologies, TACSAT-4 will also demonstrate a radiation hard solar cell measurement circuit designed to a simple interface capable of meeting the standard requirement for future solar arrays built to the AIM S-122-2007, "Electrical Power Systems for Unmanned Spacecraft." TACSAT-4 will launch in September of 2009.
C1 [Jenkins, Phillip; Walters, Robert; Skalitzky, Robert; Duffey, Timothy; Koss, Stephen; Messenger, Scott] USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[Krasowski, Michael; Prokop, Norman; Spina, Dan] NASA Glenn Res Ctr, Cleveland, OH 44135 USA.
[Eskenazi, Michael] ATK Space, Goleta, CA 93117 USA.
[Davis, Brian] S GSS, Melbourne, FL 32904 USA.
[Downard, Eric; Crist, Kevin] EMCORE Photovolta, Albuquerque, NM 87023 USA.
[O'Neill, Mark] ENTECH Inc, Park Vista, TX 76177 USA.
[Fu, Bruce] Hybrid Plast Inc, Hattiesburg, MS 39401 USA.
[Bentz, Doug] Harris Corp, Washington, DC 20375 USA.
RP Jenkins, P (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 4
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0160-8371
BN 978-1-4244-2949-3
J9 IEEE PHOT SPEC CONF
PY 2009
BP 1774
EP +
PG 2
WC Energy & Fuels
SC Energy & Fuels
GA BPY40
UT WOS:000280345900383
ER
PT B
AU Levush, B
Abe, D
Calame, J
Cooke, S
Jensen, K
Larsen, P
Pasour, J
Shaw, J
Vlasov, A
Yater, J
Nguyen, K
Pershing, D
Wright, E
Antonsen, T
Chernin, D
Chernyavskiy, I
Petillo, J
AF Levush, B.
Abe, D.
Calame, J.
Cooke, S.
Jensen, K.
Larsen, P.
Pasour, J.
Shaw, J.
Vlasov, A.
Yater, J.
Nguyen, K.
Pershing, D.
Wright, E.
Antonsen, T., Jr.
Chernin, D.
Chernyavskiy, I.
Petillo, J.
GP IEEE
TI MMW to Upper-MMW Vacuum Electronics Research at NRL
SO 2009 34TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND
TERAHERTZ WAVES, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 34th International Conference on Infrared, Millimeter, and Terahertz
Waves (IRMMW-THz 2009)
CY SEP 21-25, 2009
CL Busan, SOUTH KOREA
SP IEEE
AB The Vacuum Electronics Branch of the US Naval Research Laboratory (NRL) is actively engaged in research and development of key technologies for high-power MMW to upper-MMW amplifiers. This work includes the development and application of physics-based modeling and simulation tools, the design and development of high-perveance sheet electron beams and associated slow-wave and standing-wave interaction structures, research on high-current-density emitters, and the development and application of precise microfabrication techniques and thermal management schemes. An overview of these activities will be presented, including a discussion of the technological advances required to achieve order-of-magnitude increases in amplifier performance and a summary of the approaches being pursued and their status.
C1 [Levush, B.; Abe, D.; Calame, J.; Cooke, S.; Jensen, K.; Larsen, P.; Pasour, J.; Shaw, J.; Vlasov, A.; Yater, J.] USN, Res Lab, Washington, DC 20375 USA.
[Nguyen, K.; Pershing, D.; Wright, E.] Beam Wave Rese Inc, Bethesda, MD 20814 USA.
[Antonsen, T., Jr.; Chernyavskiy, I.; Petillo, J.] SAIC, Mclean, VA 22102 USA.
[Chernin, D.] Univ Maryland, College Pk, MD 20742 USA.
RP Levush, B (reprint author), USN, Res Lab, Washington, DC 20375 USA.
RI Abe, David/D-7546-2013; Jensen, Kevin/I-1269-2015
OI Jensen, Kevin/0000-0001-8644-1680
FU Office of Naval Research
FX This work is supported by the Office of Naval Research.
NR 3
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5416-7
PY 2009
BP 26
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BRI87
UT WOS:000282796300013
ER
PT B
AU Hilliard, D
Mensa, D
Oh, K
AF Hilliard, Donald
Mensa, Dean
Oh, Kenneth
GP IEEE
TI Utilization of Compact Range Collimator for Radar Cross-Section
Measurements
SO 2009 3RD EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION, VOLS 1-6
LA English
DT Proceedings Paper
CT 3rd European Conference on Antennas and Propagation
CY MAR 23-27, 2009
CL Berlin, GERMANY
AB This paper describes the applications of a large compact range collimator used for Radar Cross-Section measurements. Because the collimator surface is analytically describable, the field distribution in the test zone can be readily predicted for various feed radiation patterns and locations. Several unique applications of the collimating system are presented that benefit from these features.
C1 [Hilliard, Donald; Mensa, Dean] Jacobs Sverdrup Naval Syst Grp, 751 Daily Dr,300, Camarillo, CA 93010 USA.
[Oh, Kenneth] Naval Air Warfare ctr, Point Mugu Nawc, CA 93042 USA.
RP Hilliard, D (reprint author), Jacobs Sverdrup Naval Syst Grp, 751 Daily Dr,300, Camarillo, CA 93010 USA.
EM dhilliard@mindspring.com; dmensa@roadrunner.com; kenneth.oh@navy.mil
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4753-4
PY 2009
BP 887
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied;
Telecommunications
SC Engineering; Physics; Telecommunications
GA BOF99
UT WOS:000276522100205
ER
PT B
AU Childers, T
Poh, YT
McEachen, J
Tummala, M
AF Childers, Thomas
Poh, Yow Thiam
McEachen, John
Tummala, Murali
GP IEEE
TI A Model for Virtual Physical Layer Communication over Deployed Wireless
Sensor Networks
SO 2009 3RD INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING AND COMMUNICATION
SYSTEMS
LA English
DT Proceedings Paper
CT 3rd International Conference on Signal Processing and Communication
Systems
CY SEP 28-30, 2009
CL Omaha, NE
SP IEEE
DE wireless sensor networks; forward error correction; erasure codes; block
codes
ID ALGORITHM
AB A method for file transfer utilizing forward error correction (FEC) to pass traffic over deployed wireless sensor networks is studied. The entire wireless sensor network is modeled as an error-prone virtual physical link. Previous work in the area of terminal communication across the sensor network is expanded upon to include file transfer in order to provide a more capable channel and a basis for testing the performance obtained through erasure coding. The results of the FEC implementation are examined using multiple sensor network configurations. While the error correction method proved effective, larger topologies presented congestion issues due to the sensors' use of CSMA. Recommendations for future improvements are proposed.
C1 [Childers, Thomas; Poh, Yow Thiam; McEachen, John; Tummala, Murali] USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
RP Childers, T (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
EM mceachen@nps.edu; mtummala@nps.edu
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4473-1
PY 2009
BP 181
EP 189
PG 9
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BNN22
UT WOS:000275051500029
ER
PT B
AU Wagner, KT
Doroslovacki, MI
AF Wagner, Kevin T.
Doroslovacki, Milos I.
GP IEEE
TI Proportional-type NLMS Algorithm with Gain Allocation Providing Maximum
One-step Conditional PDF for True Weights
SO 2009 43RD ANNUAL CONFERENCE ON INFORMATION SCIENCES AND SYSTEMS, VOLS 1
AND 2
LA English
DT Proceedings Paper
CT 43rd Annual Conference on Information Sciences and Systems
CY MAR 18-20, 2009
CL Baltimore, MD
SP Johns Hopkins Univ, Dept Elect & Comp Engn, IEEE Informat Theory Soc
AB In this paper, we present a proportionate-type normalized least mean square algorithm which operates by choosing adaptive gains at each time step in a manner designed to maximize the conditional probability that the next-step coefficient estimates reach their optimal values. We compare and show that the performance of the maximum conditional probability density one-step algorithm is superior to the normalized least mean square algorithm and the proportionate normalized least mean square algorithm. Additionally, we argue that the algorithm we present operates for any impulse response.
C1 [Wagner, Kevin T.] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
[Doroslovacki, Milos I.] George Washington Univ, Dept Elect & Comp Engn, Washington, DC 20052 USA.
RP Wagner, KT (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
EM kevin.wagner@nrl.navy.mil; doroslov@gwu.edu
NR 5
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2733-8
PY 2009
BP 61
EP +
DI 10.1109/CISS.2009.5054691
PG 2
WC Computer Science, Information Systems; Computer Science, Theory &
Methods
SC Computer Science
GA BLT78
UT WOS:000270992700014
ER
PT B
AU Moskowitz, IS
AF Moskowitz, Ira S.
GP IEEE
TI An Approximation of the Capacity of a Simple Channel
SO 2009 43RD ANNUAL CONFERENCE ON INFORMATION SCIENCES AND SYSTEMS, VOLS 1
AND 2
LA English
DT Proceedings Paper
CT 43rd Annual Conference on Information Sciences and Systems
CY MAR 18-20, 2009
CL Baltimore, MD
SP Johns Hopkins Univ, Dept Elect & Comp Engn, IEEE Informat Theory Soc
AB We discuss the bounds for capacity of a binary-input binary-output discrete memoryless communication channel. We introduce a new lower bound that gives a very good and elementary approximation to the capacity.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Moskowitz, IS (reprint author), USN, Res Lab, CHACS 5540, Washington, DC 20375 USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2733-8
PY 2009
BP 164
EP 169
DI 10.1109/CISS.2009.5054710
PG 6
WC Computer Science, Information Systems; Computer Science, Theory &
Methods
SC Computer Science
GA BLT78
UT WOS:000270992700033
ER
PT B
AU Nguyen, GD
Kompella, S
Wieselthier, JE
Ephremides, A
AF Nguyen, Gam D.
Kompella, Sastry
Wieselthier, Jeffrey E.
Ephremides, Anthony
GP IEEE
TI Transmission Scheduling in Capture-Based Wireless Networks
SO 2009 43RD ANNUAL CONFERENCE ON INFORMATION SCIENCES AND SYSTEMS, VOLS 1
AND 2
LA English
DT Proceedings Paper
CT 43rd Annual Conference on Information Sciences and Systems
CY MAR 18-20, 2009
CL Baltimore, MD
SP Johns Hopkins Univ, Dept Elect & Comp Engn, IEEE Informat Theory Soc
ID PACKET RADIO NETWORKS; RETRANSMISSION CONTROL; MOBILE RADIO; CHANNELS
AB We study a multiple-source, single-destination wireless network that uses scheduled access as the channel-access method. Unlike many other studies of scheduled access, which are based on the use of a collision channel, we use a physical channel model that. includes other-user interference, fading, and background noise. Our primary performance measure is throughput, which is the average number of packets that axe successfully received by the destination per time slot. We develop algorithms for constructing transmission schedules, which exploit the power-capture capability of the network to enable the successful reception of multiple packets simultaneously. The results show the impact of schedule, channel fading, receiver noise, and interference on network performance. Our algorithms provide better performance than TDMA-based algorithms that do not take advantage of the power-capture capability of the network.
C1 [Nguyen, Gam D.; Kompella, Sastry] USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
[Wieselthier, Jeffrey E.] Wieselthier Res, Silver Spring, MD 20901 USA.
[Ephremides, Anthony] Univ Maryland, Syst Res Inst, Dept Elect & Comp Engn, College Pk, MD 20742 USA.
RP Nguyen, GD (reprint author), USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
FU Office of Naval Research
FX This work was supported by the Office of Naval Research.
NR 11
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2733-8
PY 2009
BP 957
EP +
DI 10.1109/CISS.2009.5054855
PG 2
WC Computer Science, Information Systems; Computer Science, Theory &
Methods
SC Computer Science
GA BLT78
UT WOS:000270992700178
ER
PT S
AU Livingston, MA
Ai, ZM
Decker, JW
AF Livingston, Mark A.
Ai, Zhuming
Decker, Jonathan W.
BE Klinker, G
Saito, H
Hollerer, T
TI A User Study towards Understanding Stereo Perception in Head-worn
Augmented Reality Displays
SO 2009 8TH IEEE INTERNATIONAL SYMPOSIUM ON MIXED AND AUGMENTED REALITY -
SCIENCE AND TECHNOLOGY
SE International Symposium on Mixed and Augmented Reality
LA English
DT Proceedings Paper
CT 8th IEEE International Symposium on Mixed and Augmented Reality
CY OCT 19-22, 2009
CL Orlando, FL
SP IEEE
DE H.5.1 [Information Interfaces and Presentation]: Multimedia Information
Systems-Artificial, augmented, and virtual realities H.5.2 [Information
Interfaces and Presentation]: User Interfaces-Evaluation/Methodology;
H.1.2 [Models and Principles]: User/Machine Systems-Human factors
ID DEPTH
AB Properly perceived stereo display is often assumed to be vital in augmented reality (AR) displays used for close distances, echoing the general understanding from the perception literature. However, the accuracy of the perception of stereo in head-worn AR displays has not been studied greatly. We conducted a user study to elicit the precision of stereo perception in AR and its dependency on the size and contrast of the stimulus. We found a strong effect of contrast on the disparity users desired to make a virtual target verge at the distance of a real reference object. We also found that whether the target began behind or in front of the reference in a method of adjustments protocol made a significant difference. The mean disparity in the rendering that users preferred had a strong linear relationship with their IPD. We present our results and infer stereoacuity thresholds.
C1 [Livingston, Mark A.; Ai, Zhuming; Decker, Jonathan W.] Naval Res Lab, Washington, DC 20375 USA.
RP Livingston, MA (reprint author), Naval Res Lab, Washington, DC 20375 USA.
EM mark.livingston@nrl.navy.mil; ai@itd.nrl.navy.mil;
jonathan.decker@nrl.navy.mil
NR 15
TC 5
Z9 5
U1 0
U2 6
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1554-7868
BN 978-1-4244-5388-7
J9 INT SYM MIX AUGMENT
PY 2009
BP 53
EP 56
DI 10.1109/ISMAR.2009.5336496
PG 4
WC Chemistry, Physical; Computer Science, Artificial Intelligence; Computer
Science, Theory & Methods; Engineering, Electrical & Electronic
SC Chemistry; Computer Science; Engineering
GA BOB94
UT WOS:000276136800008
ER
PT S
AU Ai, ZM
Livingston, MA
AF Ai, Zhuming
Livingston, Mark A.
BE Klinker, G
Saito, H
Hollerer, T
TI Integration of Georegistered Information on a Virtual Globe
SO 2009 8TH IEEE INTERNATIONAL SYMPOSIUM ON MIXED AND AUGMENTED REALITY -
SCIENCE AND TECHNOLOGY
SE International Symposium on Mixed and Augmented Reality
LA English
DT Proceedings Paper
CT 8th IEEE International Symposium on Mixed and Augmented Reality
CY OCT 19-22, 2009
CL Orlando, FL
SP IEEE
DE H.5.1 [Information Interfaces and Presentation]: Multimedia Information
Systems-Artificial, augmented, and virtual realities; H.5.3 [Information
Interfaces and Presentation]: Group and Organization
Interfaces-Computer-supported cooperative work
AB In collaborative augmented reality (AR) missions, much georegistered information is collected and sent to a command and control center. This paper describes the concept and prototypical implementation of a mixed reality (MR) based system that integrates georegistered information from AR systems and other sources on a virtual globe. The application can be used for a command and control center to monitor the field operation where multiple AR users are engaging in a collaborative mission. Google Earth is used to demonstrate the system, which integrates georegistered icons, live video streams from field operators or surveillance cameras, 3D models, and satellite or aerial photos into one MR environment.
C1 [Ai, Zhuming; Livingston, Mark A.] USN, Res Lab, Washington, DC 20375 USA.
RP Ai, ZM (reprint author), USN, Res Lab, Code 5581,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM ai@itd.nrl.navy.mil; mark.livingston@nrl.navy.mil
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1554-7868
BN 978-1-4244-5388-7
J9 INT SYM MIX AUGMENT
PY 2009
BP 169
EP 170
DI 10.1109/ISMAR.2009.5336478
PG 2
WC Chemistry, Physical; Computer Science, Artificial Intelligence; Computer
Science, Theory & Methods; Engineering, Electrical & Electronic
SC Chemistry; Computer Science; Engineering
GA BOB94
UT WOS:000276136800025
ER
PT S
AU Ghabcheloo, R
Kaminer, I
Aguiar, AP
Pascoal, A
AF Ghabcheloo, Reza
Kaminer, Isaac
Aguiar, A. Pedro
Pascoal, Antonio
GP IEEE
TI A General Framework for Multiple Vehicle Time-Coordinated Path Following
Control
SO 2009 AMERICAN CONTROL CONFERENCE, VOLS 1-9
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference 2009
CY JUN 10-12, 2009
CL St Louis, MO
ID SYSTEMS
AB This paper describes a general framework for the study of multiple vehicle, time-coordinated path following (TC-PF) control problems. An example is the situation where a group of vehicles is tasked to maneuver and arrive at preassigned final positions at the same time in a collision-free manner, while reducing some optimality criterion. The time of arrival is not fixed a priori, and the vehicles must negotiate their speeds along the spatial paths that they follow in order to arrive simultaneously and avoid collision. The general framework adopted leads to integrated solutions to TC-PF problems that unfold in three steps: 1) Generation of Deconflicted Trajectories for a group of vehicles, 2) Path Following for each vehicle along its assigned path, and 3) Coordination of the relative motion of the vehicles along their paths, so as to guarantee deconfliction and meet desired temporal constraints such as equal times of arrival. The last step is accomplished by varying the speed of each vehicle about the nominal speed profile computed in step 1, based on the exchange of information with its neighbors. The paper formulates the problem mathematically, offers a general framework for its solution, and illustrates the efficacy of the proposed methodology in simulation with dynamic models of Autonomous Underwater Vehicles (AUVs).
C1 [Ghabcheloo, Reza] Tampere Univ Technol, Dept Inteligent Hydraul & Automat, POB 589, FIN-33101 Tampere, Finland.
[Kaminer, Isaac] Naval Postgraduate Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
[Aguiar, A. Pedro; Pascoal, Antonio] Inst Super Tecn, Dept Elect & Comp Engn, Inst Syst & Robot, P-1049001 Lisbon, Portugal.
RP Ghabcheloo, R (reprint author), Tampere Univ Technol, Dept Inteligent Hydraul & Automat, POB 589, FIN-33101 Tampere, Finland.
EM reza.ghabcheloo@tut.fi; kaminer@nps.navy.edu; pedro@isr.ist.utl.pt;
antonio@isr.ist.utl.pt
RI Aguiar, A. Pedro/L-4305-2014;
OI Aguiar, A. Pedro/0000-0001-7105-0505; PASCOAL, ANTONIO
/0000-0002-0657-6671
FU GREX / CEC-IST [035223]; NAV-Control / FCT-PT [PTDC/EEA-ACR/65996/2006];
Co3-AUVs [231378]; FCT-ISR/IST; FREESUBNET RTN of the CEC; NSF
[ECS-0242798]; Academy of Finland
FX Research supported in part by projects GREX / CEC-IST (Contract No.
035223), NAV-Control / FCT-PT (PTDC/EEA-ACR/65996/2006), and Co3-AUVs
(EU FP7 under grant agreement n. 231378), the FCT-ISR/IST plurianual
funding program, the FREESUBNET RTN of the CEC, NSF Grant ECS-0242798,
and the Academy of Finland.
NR 21
TC 6
Z9 7
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4244-4523-3
J9 P AMER CONTR CONF
PY 2009
BP 3071
EP +
DI 10.1109/ACC.2009.5160564
PG 2
WC Automation & Control Systems
SC Automation & Control Systems
GA BLF29
UT WOS:000270044901178
ER
PT S
AU Mukherjee, K
Ray, A
Wettergren, T
Chattopadhyay, I
Phoha, S
AF Mukherjee, Kushal
Ray, Asok
Wettergren, Thomas
Chattopadhyay, Ishanu
Phoha, Shashi
GP IEEE
TI Signal Threshold Estimation in a Sensor Field for Undersea Target
Tracking
SO 2009 AMERICAN CONTROL CONFERENCE, VOLS 1-9
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference 2009
CY JUN 10-12, 2009
CL St Louis, MO
DE Tracking before detection; Symbolic Time Series Analysis; Formal
language construction
ID REGULAR LANGUAGES
AB This paper addresses the problem of online surveillance of undersea targets moving over a deployed sensor field. A real-time algorithm has been formulated to estimate the detection threshold based on the ensemble of sensor time series data collected from the track of a moving target. The probabilistic-state-machine-based algorithm is optimal in the sense of weighted linear least squares. The algorithm has been tested with sensor data from several tracks on a simulation test bed.
C1 [Mukherjee, Kushal; Ray, Asok; Chattopadhyay, Ishanu; Phoha, Shashi] Penn State Univ, University Pk, PA 16802 USA.
[Wettergren, Thomas] Naval Undersea Warfare Ctr, Newport, RI USA.
RP Mukherjee, K (reprint author), Penn State Univ, University Pk, PA 16802 USA.
OI Wettergren, Thomas/0000-0002-6623-8412
FU U.S. Office of Naval Research under [N00014-08-1-380]; U.S. Army
Research Office (ARO) [W911NF-07-1-0376]
FX This work has been supported in part by the U.S. Office of Naval
Research under Grant No. N00014-08-1-380, and by the U.S. Army Research
Office (ARO) under Grant No. W911NF-07-1-0376. Any opinions, findings
and conclusions or recommendations expressed in this publication are
those of the authors and do not necessarily reflect the views of the
sponsoring agencies.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4244-4523-3
J9 P AMER CONTR CONF
PY 2009
BP 3591
EP +
DI 10.1109/ACC.2009.5159844
PG 2
WC Automation & Control Systems
SC Automation & Control Systems
GA BLF29
UT WOS:000270044901264
ER
PT S
AU Robertson, MJ
AF Robertson, Michael J.
GP IEEE
TI Experimental Verification of Saturation Reducing, Zero Vibration Command
Shapers
SO 2009 AMERICAN CONTROL CONFERENCE, VOLS 1-9
SE PROCEEDINGS OF THE AMERICAN CONTROL CONFERENCE
LA English
DT Proceedings Paper
CT American Control Conference 2009
CY JUN 10-12, 2009
CL St Louis, MO
AB Command shapers are used to create inputs that will move flexible systems without residual vibration. Originally developed for linear systems, command shapers use superposition of the inputs to cancel vibration and control the system response. Nonlinearities in the system degrade the performance of traditional command shapers. The presence of "hard" nonlinearities such as actuator saturation, distort the desired commands before they reach the plant. Command shapers that avoid saturating the actuators, thus allowing the desired command to reach the plant in the original form, have been developed for a mass under PD control. These shapers are easier to compute than previously shown results. Simulations and experiments verify the efficacy of the new shapers.
C1 USN Acad, Weap & Syst Engn Dept, Annapolis, MD 21403 USA.
RP Robertson, MJ (reprint author), USN Acad, Weap & Syst Engn Dept, Annapolis, MD 21403 USA.
EM mroberts@usna.gov
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1619
BN 978-1-4244-4523-3
J9 P AMER CONTR CONF
PY 2009
BP 4939
EP 4944
DI 10.1109/ACC.2009.5160438
PG 6
WC Automation & Control Systems
SC Automation & Control Systems
GA BLF29
UT WOS:000270044902159
ER
PT S
AU Tamanaha, CR
Mulvaney, SP
Rife, JC
AF Tamanaha, Cy R.
Mulvaney, Shawn P.
Rife, Jack C.
GP IEEE
TI Evolution of a Magnetic-Based Biomolecular Detection System
SO 2009 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE
AND BIOLOGY SOCIETY, VOLS 1-20
SE IEEE Engineering in Medicine and Biology Society Conference Proceedings
LA English
DT Proceedings Paper
CT Annual International Conference of the
IEEE-Engineering-in-Medicine-and-Biology-Society
CY SEP 03-06, 2009
CL Minneapolis, MN
SP IEEE Engn Med & Biol Soc
ID BIOSENSORS; BIOASSAYS; MATRICES
AB Amongst the plethora of affinity biosensor systems based on biomolecular recognition and labeling assays, magnetic labeling and detection has emerged as a promising approach. Magnetic labels can be detected by a wide range of non-invasive methods, are physically and chemically stable, relatively inexpensive to produce, and can be easily made biocompatible. Over a decade ago, the U. S. Naval Research Laboratory pioneered the use of giant magnetoresistive (GMR) sensors to detect biomolecules labeled with paramagnetic microbeads. Since then, our various investigations and engineering efforts have resulted in significant improvements in both the magnetoelectronic instrumentation and the assays associated with these magnetic labels. This paper and subsequent presentation provides a synopsis of the development of our technology which has evolved into a highly sensitive detection method.
C1 [Tamanaha, Cy R.; Rife, Jack C.] USN, Res Lab, Washington, DC 20375 USA.
[Mulvaney, Shawn P.] Nova Res Inc, Alexandria, VA 22308 USA.
RP Tamanaha, CR (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM cy.tamanaha@nrl.navy.mil; shawn.mulvaney.ctr@nrl.navy.mil;
jack.rife@nrl.navy.mil
FU U. S. Office of Naval Research; CRADA with Seahawk Biosystems, Inc.
[NCRADA-NRL-04-341]
FX This work was supported in part by the U. S. Office of Naval Research
and a CRADA with Seahawk Biosystems, Inc. (NCRADA-NRL-04-341).
NR 14
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1557-170X
BN 978-1-4244-3295-0
J9 IEEE ENG MED BIO
PY 2009
BP 5425
EP +
DI 10.1109/IEMBS.2009.5332482
PG 2
WC Engineering, Biomedical
SC Engineering
GA BQB05
UT WOS:000280543604083
ER
PT B
AU Petry, FE
Yager, RR
AF Petry, Frederick E.
Yager, Ronald R.
GP IEEE
TI Creativity Aspects of Data Generalization
SO 2009 ANNUAL MEETING OF THE NORTH AMERICAN FUZZY INFORMATION PROCESSING
SOCIETY
LA English
DT Proceedings Paper
CT Annual Meeting of the
North-American-Fuzzy-Information-Processing-Society
CY JUN 14-17, 2009
CL Cincinnati, OH
DE creativity; data generalization; congurence; specificity; parttions
AB In this paper we examine issues involving measures of creativity for attribute data generalization using hierarchies. In particular we consider consensus and specificity measures for the partitions that result using crisp concept hierarchies. We note that fuzzy hierarchies do not produce partitions of data in general so some approaches to considering degrees of partitioning is described.
C1 [Petry, Frederick E.] USN, Res Lab, MC&G Code 7440-5, Stennis Space Ctr, MS 39529 USA.
[Yager, Ronald R.] Iona Coll, Inst Machine Intelligence, New Rochelle, NY 10801 USA.
RP Petry, FE (reprint author), USN, Res Lab, MC&G Code 7440-5, Stennis Space Ctr, MS 39529 USA.
EM fpetry@nrlssc.navy.mil; yager@panix.com
RI Yager, Ronald/A-2960-2013
FU Naval Research Laboratory's Base Program [0602435N]
FX We would like to thank the Naval Research Laboratorys Base Program,
Program Element No.0602435N for sponsoring this research
NR 24
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4575-2
PY 2009
BP 253
EP +
PG 2
WC Computer Science, Artificial Intelligence; Computer Science, Information
Systems; Computer Science, Interdisciplinary Applications
SC Computer Science
GA BMC16
UT WOS:000271827700043
ER
PT B
AU Hornstein, MK
Jones, TG
Ting, AC
Lindwall, D
AF Hornstein, Melissa K.
Jones, Theodore G.
Ting, Antonio C.
Lindwall, Dennis
GP IEEE
TI Optical Bandwidth and Focusing Dynamics Effects on an Underwater Laser
Acoustic Source
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
ID BREAKDOWN; WATER
AB Both femtosecond and nanosecond laser pulses can produce nonlinear effects in water, including filamentation and laser-induced breakdown resulting in acoustic generation. We examine the effects of GVD, varying wavelength, bandwidth, energy, and focusing configurations. (C) 2009 Optical Society of America
C1 [Hornstein, Melissa K.; Jones, Theodore G.; Ting, Antonio C.] USN, Div Plasma Phys, Res Lab, Washington, DC 20375 USA.
RP Hornstein, MK (reprint author), USN, Div Plasma Phys, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM ted.jones@nrl.navy.mil
NR 4
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 650
EP 651
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751300327
ER
PT B
AU Bewley, WW
Canedy, CL
Kim, CS
Kim, M
Lindle, JR
Abell, J
Vurgaftman, I
Meyer, JR
AF Bewley, W. W.
Canedy, C. L.
Kim, C. S.
Kim, M.
Lindle, J. R.
Abell, J.
Vurgaftman, I.
Meyer, J. R.
GP IEEE
TI Mid-Infrared Interband Cascade Lasers Operating CW at Room Temperature
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB Improvements in the design of mid-infrared interband cascade lasers have allowed them to operate cw to 334 and 319 K for devices with emission wavelengths of 3.3 and 3.7 mu m, respectively. (C) 2009 Optical Society of America
C1 [Bewley, W. W.; Canedy, C. L.; Kim, C. S.; Kim, M.; Lindle, J. R.; Abell, J.; Vurgaftman, I.; Meyer, J. R.] USN, Res Lab, Washington, DC 20375 USA.
RP Bewley, WW (reprint author), USN, Res Lab, Code 5613, Washington, DC 20375 USA.
EM vurgaftman@nrl.navy.mil
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 846
EP 847
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751300426
ER
PT B
AU Nolde, JA
Abell, J
Kim, M
Kim, CS
Vurgaftman, I
Meyer, JR
Wang, XJ
Fan, JY
AF Nolde, J. A.
Abell, J.
Kim, M.
Kim, C. S.
Vurgaftman, I.
Meyer, J. R.
Wang, X. J.
Fan, J. Y.
GP IEEE
TI Broad-Area Quantum Cascade Lasers with Pulsed Output Power up to 53 W
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB A 3-mm-long, 150-mu m-wide broad-area quantum cascade laser (lambda = 4.65 mu m) with sidewall corrugations produced a maximum-current-limited pulsed output power of 53 W and wall-plug efficiency of 29.4% from two facets at 80 K. (C) 2009 Optical Society of America
C1 [Nolde, J. A.; Abell, J.; Kim, M.; Kim, C. S.; Vurgaftman, I.; Meyer, J. R.] USN, Res Lab, Code 5613, Washington, DC 20375 USA.
[Wang, X. J.; Fan, J. Y.] City Indust, Adtteh Optics, Pomona, CA USA.
RP Nolde, JA (reprint author), USN, Res Lab, Code 5613, Washington, DC 20375 USA.
EM vurgaftman@nrl.navy.mil
NR 4
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 886
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751300446
ER
PT B
AU Xu, GB
Mu, XD
Ding, YJ
Canedy, CL
Aifer, EH
Vurgaftman, I
Meyer, JR
AF Xu, Guibao
Mu, Xiaodong
Ding, Yujie J.
Canedy, Chad L.
Aifer, Edward H.
Vurgaftman, Igor
Meyer, Jerry R.
GP IEEE
TI Recombination dynamics of photogenerated carriers in 10.4 mu m-cutoff
photodiodes consisting of W-structured superlattices
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB We used pump-probe technique to investigate recombination dynamics of photogenerated carriers in photodiodes consisting of InAs/GaInSb W-structured superlattices. Recombination time constants of 1.6 ns and 10 ns were measured under high and low powers, respectively. (C)2009 Optical Society of America
C1 [Xu, Guibao; Mu, Xiaodong; Ding, Yujie J.] Lehigh Univ, Dept Elect & Comp Engn, Bethlehem, PA 18015 USA.
[Canedy, Chad L.; Aifer, Edward H.; Vurgaftman, Igor; Meyer, Jerry R.] Naval Res Lab, Code 6818, Washington, DC 20375 USA.
RP Xu, GB (reprint author), Lehigh Univ, Dept Elect & Comp Engn, Bethlehem, PA 18015 USA.
EM yud2@lehigh.edu
FU Lehigh-ARL cooperative agreement; AFOSR
FX This work has been supported under Lehigh-ARL cooperative agreement and
by AFOSR.
NR 3
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 896
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751300451
ER
PT B
AU Cranch, GA
AF Cranch, Geoffrey A.
GP IEEE
TI Reconstruction of a Strong Fiber Bragg Grating's Complex Coupling
Coefficient in Erbium Doped Fiber with Optical Space Domain
Reflectometry
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB An improved implementation of optical space domain reflectometry is presented using all interferometric characterization method and deconvolution technique. Reconstruction of a strong Bragg grating written in erbium fiber, with a qL similar to 8.6 is demonstrated.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Cranch, GA (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM geoff_cranch@yahoo.com
NR 7
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 936
EP 937
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751300471
ER
PT B
AU Miller, GA
Flockhart, GMH
Cranch, GA
AF Miller, Gary A.
Flockhart, Gordon M. H.
Cranch, Geoffrey A.
GP IEEE
TI Reducing Phase Errors During the Inscription Process of Distributed
Feedback Fiber Lasers
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB The fabrication of a reduced phase error, distributed feedback fiber laser in erbium-doped fiber is presented. Using the Trace Grating technique, the overall phase error has been reduced by a factor of 2.5. (C)2009 Optical Society of America
C1 [Miller, Gary A.] USN, Res Lab, Washington, DC 20375 USA.
RP Miller, GA (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM gary.miller@osamember.org
RI Flockhart, Gordon/B-9664-2009
OI Flockhart, Gordon/0000-0002-8777-7511
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 938
EP 939
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751300472
ER
PT B
AU Khurgin, JB
Pruessner, MW
Stievater, TH
Rabinovich, WS
AF Khurgin, J. B.
Pruessner, M. W.
Stievater, T. H.
Rabinovich, W. S.
GP IEEE
TI Pockels Effect in Short Period Silicon Germanium Superlattices
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
ID SI
AB We introduce a method for calculating Pockels coefficients in SiGe superlattices, We show that the Pockels effect in (Si)(I)(Ge)(I) superlattices is half as strong as in GaAs. This opens a path to efficient CMOS-compatible modulators. (C) 2009 Optical Society of America
C1 [Khurgin, J. B.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Pruessner, M. W.; Stievater, T. H.; Rabinovich, W. S.] US Navy, Res Lab, Washington, DC USA.
RP Khurgin, JB (reprint author), Johns Hopkins Univ, Baltimore, MD 21218 USA.
EM jakek@jhu.edu
NR 9
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 1059
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751300533
ER
PT B
AU Hu, J
Menyuk, CR
Shaw, LB
Sanghera, JS
Aggarwal, ID
AF Hu, J.
Menyuk, C. R.
Shaw, L. B.
Sanghera, J. S.
Aggarwal, I. D.
GP IEEE
TI Generating mid-IR source using As2S3-based chalcogenide photonic crystal
fibers
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB We found that 25% of the input power of a 2 mu m wavelength 1 kW peak-power source can be shifted into the region between 3-5 mu m using an As2S3-based chalcogerfide PCF. Tapering increases the output at,vavelengths above 4 mu m. (C) 2009 Optical Society of America
C1 [Hu, J.; Menyuk, C. R.] Univ Maryland Baltimore Cty, Dept Comp Sci & Elect Engn, TRC205A,1000 Hilltop Circle, Baltimore, MD 21250 USA.
[Shaw, L. B.; Sanghera, J. S.; Aggarwal, I. D.] US Navy, Res Lab, Washington, DC 20375 USA.
RP Hu, J (reprint author), Univ Maryland Baltimore Cty, Dept Comp Sci & Elect Engn, TRC205A,1000 Hilltop Circle, Baltimore, MD 21250 USA.
EM hu1@umbc.edu
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 1083
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751300545
ER
PT B
AU Holmstrom, SA
Stievater, TH
Pruessner, MW
Rabinovich, WS
Kanakaraju, S
Calhoun, LC
Khurgin, JB
Kelly, DP
Ghodssi, R
AF Holmstrom, S. A.
Stievater, T. H.
Pruessner, M. W.
Rabinovich, W. S.
Kanakaraju, S.
Calhoun, L. C.
Khurgin, J. B.
Kelly, D. P.
Ghodssi, R.
GP IEEE
TI Spontaneous Raman Scattering in Suspended InGaAsP Waveguides
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
ID IN1-XGAXASYP1-Y
AB We demonstrate the spontaneous Raman effect in suspended InGaAsP waveguides and report that the zinc blende Raman selection rules are relaxed in the waveguide geometry. (C) 2008 Optical Society of America
C1 [Holmstrom, S. A.] Univ Tulsa, Tulsa, OK 74104 USA.
[Stievater, T. H.; Pruessner, M. W.; Rabinovich, W. S.] Naval Res Lab, Washington, DC 20375 USA.
[Kanakaraju, S.; Calhoun, L. C.] Lab Phys Sci, College Pk, MD 20740 USA.
[Khurgin, J. B.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Kelly, D. P.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Ghodssi, R.] Univ Maryland, College Pk, MD 20742 USA.
RP Holmstrom, SA (reprint author), Univ Tulsa, Tulsa, OK 74104 USA.
EM scott-holmstrom@utulsa.edu
NR 8
TC 0
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 1187
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751300597
ER
PT B
AU Kirch, J
Garrod, T
Kim, S
Park, JH
Shin, JC
Mawst, LJ
Kuech, TF
Song, X
Babcock, SE
Vurgaftman, I
Meyer, JR
AF Kirch, J.
Garrod, T.
Kim, S.
Park, J. H.
Shin, J. C.
Mawst, L. J.
Kuech, T. F.
Song, X.
Babcock, S. E.
Vurgaftman, I.
Meyer, J. R.
GP IEEE
TI InAsyP1-y Metamorphic Buffer Layers (MBLs) on InP Substrates for Mid-IR
Diode Lasers
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
ID DISTRIBUTED-FEEDBACK LASERS; QUANTUM-WELL LASERS; OUTPUT POWER
AB InAs QWs grown with InAsyP1-y metamorphic buffer layers on InP substrates demonstrate mid-IR emission. A novel Al-free InAsP/InGaAs SCH design provides improved carrier confinement, allowing InAs QW laser emission near lambda similar to 2.5 mu m @77K. (C) 2009 Optical Society of America
C1 [Kirch, J.; Garrod, T.; Kim, S.; Park, J. H.; Shin, J. C.; Mawst, L. J.] Univ Wisconsin, Dept Elect & Comp Engn, 1415 Johnson Dr, Madison, WI 53706 USA.
[Kuech, T. F.] Univ Wisconsin, Dept Chem & Biol Engn, Madison, WI 53706 USA.
[Song, X.] West Virginia Univ, Dept Mech & Aerosp Engn, Morgantown, WV 26506 USA.
[Babcock, S. E.] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA.
[Vurgaftman, I.; Meyer, J. R.] Naval Res Lab, Washington, DC 20375 USA.
RP Kirch, J (reprint author), Univ Wisconsin, Dept Elect & Comp Engn, 1415 Johnson Dr, Madison, WI 53706 USA.
EM jdkirch@wisc.edu
FU ARO MURI [W911NF-05-1-0262]
FX This work is supported by ARO MURI W911NF-05-1-0262 (Dr. John Prater).
NR 13
TC 0
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U1 0
U2 1
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 1409
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751301028
ER
PT B
AU Stievater, TH
Park, D
Rabinovich, WS
Kanakaraju, S
Richardson, CJK
Khurgin, JB
AF Stievater, T. H.
Park, D.
Rabinovich, W. S.
Kanakaraju, S.
Richardson, C. J. K.
Khurgin, J. B.
GP IEEE
TI Enhanced Electro-Optic Effects in Suspended Waveguides
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
ID 1.55 MU-M; MODULATORS
AB We demonstrate enhanced electro-optic phase shifts in suspended InGaAs/InGaAsP quantum well waveguides compared to attached waveguides. The enhancement sterns from tightened mode confinement between the electrodes, and should improve further with thinner waveguides. (C) 2008 Optical Society of America
C1 [Stievater, T. H.; Park, D.; Rabinovich, W. S.] USN, Res Lab, Washington, DC 20375 USA.
[Kanakaraju, S.; Richardson, C. J. K.] Lab Phys Sci, College Pk, MD 20740 USA.
[Khurgin, J. B.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
RP Stievater, TH (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM stievater@nrl.navy.mil
NR 5
TC 0
Z9 0
U1 0
U2 1
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 1599
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751301123
ER
PT B
AU McKinney, JD
Leaird, DE
Weiner, AM
Williams, KJ
AF McKinney, Jason D.
Leaird, Daniel E.
Weiner, Andrew M.
Williams, Keith J.
GP IEEE
TI Measurement of Photodiode Harmonic Distortion using Optical Comb Sources
and High-Resolution Optical Filtering
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB Optical combs and high-resolution optical filtering are utilized for high-fidelity measurements of photodiode harmonic distortion. This new technique uses a single laser and phase modulation - alleviating requirements on laser frequency stabilization and modulator bias control. (c) 2008 Optical Society of America
C1 [McKinney, Jason D.; Williams, Keith J.] USN, Res Lab, Photon Technol Branch, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[Leaird, Daniel E.; Weiner, Andrew M.] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47906 USA.
RP McKinney, JD (reprint author), USN, Res Lab, Photon Technol Branch, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM jdm@ccs.nrl.navy.mil
FU Office of Naval Research; Naval Postgraduate School under the National
Security Science and Engineering Faculty Fellowship Program
[N00244-09-1-0068]
FX Manuscript received October 07, 2009; revised January 05, 2010. First
pub- lished March 04, 2010; current version published March 31, 2010.
This work was supported in part by the Office of Naval Research. The
work at Purdue was supported in part by the Naval Postgraduate School
under grant N00244-09-1-0068 under the National Security Science and
Engineering Faculty Fellowship Program
NR 5
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 1755
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751301202
ER
PT B
AU Carter, SG
Shabaev, A
Economou, SE
Kennedy, TA
Bracker, AS
Reinecke, TL
AF Carter, S. G.
Shabaev, A.
Economou, Sophia E.
Kennedy, T. A.
Bracker, A. S.
Reinecke, T. L.
GP IEEE
TI Directing Nuclear Spin Flips in InAs Quantum Dots Using Detuned Optical
Pulse Trains
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB We demonstrate that the sign of detuning of an optical pulse train from quantum dot resonances controls the direction of nuclear spin flips. This effect can produce a narrow, precise distribution of nuclear spin polarizations. (C) 2009 Optical Society of America
C1 [Carter, S. G.; Economou, Sophia E.; Kennedy, T. A.; Bracker, A. S.; Reinecke, T. L.] USN, Res Lab, Washington, DC 20375 USA.
[Shabaev, A.] George Mason Univ, Dept Computat & Data Sci, Fairfax, VA 22030 USA.
RP Carter, SG (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM sam.carter@nrl.navy.mil
RI Carter, Sam/G-4589-2012
NR 2
TC 0
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U2 0
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 1960
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751301307
ER
PT B
AU Sun, B
Xu, XD
Berman, PR
Steel, DG
Bracker, AS
Gammon, D
Sham, LJ
AF Sun, Bo
Xu, Xiaodong
Berman, Paul R.
Steel, D. G.
Bracker, A. S.
Gammon, D.
Sham, L. J.
GP IEEE
TI Coherent Population Trapping of an Electron Spin in a Single Negatively
Charged Quantum Dot
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
ID ELECTROMAGNETICALLY INDUCED TRANSPARENCY
AB We report the demonstration of coherent population trapping of an electron spin by means of coherent optical spectroscopy of a single negatively charged quantum dot. (C) 2008 Optical Society of America
C1 [Sun, Bo; Xu, Xiaodong; Berman, Paul R.; Steel, D. G.] Univ Michigan, HM Randall Lab, Ann Arbor, MI 48109 USA.
[Bracker, A. S.; Gammon, D.] Naval Res Lab, Washington, DC USA.
[Sham, L. J.] Univ Calif, Dept Phys, San Diego, CA USA.
RP Sun, B (reprint author), Univ Michigan, HM Randall Lab, Ann Arbor, MI 48109 USA.
EM dst@eecs.umich.edu; gammon@nrl.navy.mil; lsham@ucsd.edu
FU US ARO; DARPA; AFOSR; ONR; NSA/LPS; FOCUS-NSF
FX This work is supported by US ARO, DARPA, AFOSR, ONR, NSA/LPS, and
FOCUS-NSF.
NR 7
TC 0
Z9 0
U1 0
U2 1
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 2044
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751302004
ER
PT B
AU Kim, D
Economou, SE
Badescu, SC
Scheibner, M
Bracker, AS
Bashkansky, M
Reinecke, TL
Gammon, D
AF Kim, Danny
Economou, Sophia E.
Badescu, S. C.
Scheibner, M.
Bracker, A. S.
Bashkansky, M.
Reinecke, T. L.
Gammon, D.
GP IEEE
TI Optical Spin Initialization and Nondestructive Measurement in a Quantum
Dot Molecule
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB The spin of an electron in an InAs/GaAs quantum-dot molecule is optically prepared and nondestructively measured through trion-triplet states. With two-laser transmission spectroscopy we demonstrate both simultaneously, something not previously accomplished in single quantum dots.
C1 [Kim, Danny; Economou, Sophia E.; Badescu, S. C.; Scheibner, M.; Bracker, A. S.; Bashkansky, M.; Reinecke, T. L.; Gammon, D.] USN, Res Lab, Washington, DC 20375 USA.
RP Kim, D (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 3
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 2046
EP 2047
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751302005
ER
PT B
AU Kim, ED
Smirl, K
Xu, XD
Sun, B
Steel, DG
Bracker, AS
Gammon, D
Sham, LJ
AF Kim, Erik D.
Smirl, Katherine
Xu, Xiaodong
Sun, Bo
Steel, D. G.
Bracker, A. S.
Gammon, D.
Sham, L. J.
GP IEEE
TI Coherent Ultrafast Optical Control of an Electron Spin Initialized to a
Pure State in a Charged Self-Assembled Quantum Dot
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB We demonstrate the optical initialization and ultrafast coherent control of an electron spin in a self-assembled dot, showing a spin Rabi oscillation and time-resolved precession of the electron spin coherence. (C) 2008 Optical Society of America
C1 [Kim, Erik D.; Smirl, Katherine; Xu, Xiaodong; Sun, Bo; Steel, D. G.] Univ Michigan, HM Randall Lab, Ann Arbor, MI 48109 USA.
[Bracker, A. S.; Gammon, D.] Naval Res Lab, Washington, DC USA.
[Sham, L. J.] Univ Calif, Dept Phys, San Diego, CA USA.
RP Kim, ED (reprint author), Univ Michigan, HM Randall Lab, Ann Arbor, MI 48109 USA.
EM dst@eecs.umich.edu; gammon@nrl.navy.mil; lsham@ucsd.edu
RI Truex, Katherine/E-2973-2010
OI Truex, Katherine/0000-0001-8219-2672
FU ARO; AFOSR; ONR; NSA/ARDA; DARPA; IARPA; NSF
FX This work was supported in part by ARO, AFOSR, ONR, NSA/ARDA, DARPA,
IARPA and NSF.
NR 6
TC 0
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U1 0
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 2048
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751302006
ER
PT B
AU Sun, B
Xu, XD
Steel, DG
Yao, W
Bracker, AS
Gammon, D
Sham, LJ
AF Sun, Bo
Xu, Xiaodong
Steel, D. G.
Yao, Wang
Bracker, A. S.
Gammon, D.
Sham, L. J.
GP IEEE
TI Optically Controlled Locking of the Nuclear Field via Coherent Dark
State Spectroscopy
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
ID ELECTRON-SPIN
AB We report the suppression of nuclear spin fluctuations in a self assembled quantum dot via coherent dark state spectroscopy; resulting in a factor of 40 enhancement of the coherence time of a single electron spin. (C) 2008 Optical Society of America
C1 [Sun, Bo; Xu, Xiaodong; Steel, D. G.] Univ Michigan, HM Randall Lab, Ann Arbor, MI 48109 USA.
[Yao, Wang] Univ Hong Kong, Dept Phys, Hong Hom, Hong Kong, Peoples R China.
[Bracker, A. S.; Gammon, D.] US Navy, Res Lab, Washington, DC 20375 USA.
[Sham, L. J.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
RP Sun, B (reprint author), Univ Michigan, HM Randall Lab, Ann Arbor, MI 48109 USA.
EM dst@eecs.umich.edu; gammon@nrl.navy.mil; lsham@ucsd.edu
FU U.S. ARO; AFOSR; ONR; NSA/LPS; IARPA; FOCUS-NSF
FX This work is supported by U.S. ARO, AFOSR, ONR, NSA/LPS, IARPA, and
FOCUS-NSF. The authors thank P. L. McEuen, L.-M. Duan, and D. Kim for
fruitful discussions.
NR 4
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 2088
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751302026
ER
PT B
AU Scheibner, M
Bracker, AS
Kim, D
Ponomarev, IV
Gammon, D
AF Scheibner, M.
Bracker, A. S.
Kim, D.
Ponomarev, I. V.
Gammon, D.
GP IEEE
TI Two-photon spectroscopy of InAs Quantum Dot Molecules
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB Optical spectra of InAs quantum dot molecules show clear signatures of 2-photon absorption through sequential and simultaneous transitions. Biexcitons can be spatially direct or indirect, producing 2-photon transitions that are unique to molecules. (C) 2009 Optical Society of America
C1 [Scheibner, M.; Bracker, A. S.; Kim, D.; Ponomarev, I. V.; Gammon, D.] USN, Res Lab, Washington, DC 20375 USA.
RP Scheibner, M (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM scheibner@bloch.nrl.navv.mil
RI Ponomarev, Ilya/F-5183-2010
OI Ponomarev, Ilya/0000-0002-8584-6034
NR 4
TC 0
Z9 0
U1 0
U2 0
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 2337
EP 2338
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751302152
ER
PT B
AU Owrutsky, JC
Pomfret, MB
Brown, DJ
AF Owrutsky, J. C.
Pomfret, Michael B.
Brown, Douglas J.
GP IEEE
TI Ultrafast Studies of Metal Nanorod Coherent Acoustic Oscillations
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB Ultrafast transient absorption spectroscopy was used to characterize coherent acoustic oscillations of a series of nanorods composed of a wide variety of metals. The oscillations provide information on the nanorods' composition, structure and relaxation properties. (C) 2009 Optical Society of America
C1 [Owrutsky, J. C.; Pomfret, Michael B.] Div Chem, Naval Res Lab, Washington, DC 20375 USA.
[Brown, Douglas J.] US Naval Acad, Dept Chem, Annapolis, MD 21402 USA.
RP Owrutsky, JC (reprint author), Div Chem, Naval Res Lab, Washington, DC 20375 USA.
EM jeff.owrutksy@nrl.navy.mil
RI Owrutsky, Jeffrey/K-7649-2012
FU Naval Research through the Naval Research Laboratory; NRC - NRL
Postdoctoral
FX Support for this work was provided by the Office of Naval Research
through the Naval Research Laboratory. M.B.P. acknowledges the NRC - NRL
Postdoctoral Fellowship program.
NR 6
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 2551
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751302260
ER
PT B
AU Fatemi, FK
Terraciano, ML
Bashkansky, M
AF Fatemi, Fredrik K.
Terraciano, Matthew L.
Bashkansky, Mark
GP IEEE
TI Spatial and Temporal Magnetometry Using Cold Atoms in Dark Optical
Tweezers
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB We use Faraday spectroscopy of atoms confined to crossed hollow beam tweezers to map magnetic fields over several millimeters with 100 micron resolution. The traps permit several hundred measurements in a single loading cycle. (C) 2009 Optical Society of America
C1 [Fatemi, Fredrik K.; Terraciano, Matthew L.; Bashkansky, Mark] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
RP Fatemi, FK (reprint author), USN, Res Lab, Div Opt Sci, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM ffatemi@ees.nrl.navy.mil
NR 5
TC 0
Z9 0
U1 1
U2 1
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 2675
EP 2676
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751302322
ER
PT B
AU McDonald, JP
Picard, YN
Yalisove, SM
Adams, DP
AF McDonald, Joel P.
Picard, Yoosuf N.
Yalisove, Steven M.
Adams, David P.
GP IEEE
TI Pulsed laser ignition thresholds of energetic multilayer foils
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
ID FEMTOSECOND; NANOSECOND; MICROSCOPY; COMBUSTION; ABLATION
AB Ignition thresholds for energetic multilayer foils comprised of aluminum (AI) and platinum (Pt) layers are presented as a function of foil properties for laser pulse durations of 100 femtosecond (fs) and 30 nanosecond (ns). (C) 2009 Optical Society of America
C1 [McDonald, Joel P.; Adams, David P.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
[Picard, Yoosuf N.] Naval Res Lab, Washington, DC 20375 USA.
[Yalisove, Steven M.] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA.
RP McDonald, JP (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM jpmcdon@sandia.gov
NR 11
TC 2
Z9 2
U1 0
U2 5
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 3049
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751302510
ER
PT B
AU Pruessner, MW
Stievater, TH
Rabinovich, WS
Devgan, PS
Urick, VJ
AF Pruessner, Marcel W.
Stievater, Todd H.
Rabinovich, William S.
Devgan, Preetpaul S.
Urick, Vincent J.
GP IEEE
TI Silicon-On-Insulator Integrated Waveguide Filters for Photonic
Channelizer Applications
SO 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND
LASER SCIENCE CONFERENCE (CLEO/QELS 2009), VOLS 1-5
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics/Quantum Electronics and Laser
Science Conference (CLEO/QELS 2009)
CY JUN 02-04, 2009
CL Baltimore, MD
AB We demonstrate integrated waveguide microcavity filters for channelizer applications. Various filters exhibit bandwidths of BW<2 GHz (16 pm), free spectral range FSR>83 GHz (1.87nm), and maximum finesse F=77. Several contributions to filter loss are examined. (C) 2008 Optical Society of America
C1 [Pruessner, Marcel W.; Stievater, Todd H.; Rabinovich, William S.; Devgan, Preetpaul S.; Urick, Vincent J.] USN, Res Lab, Washington, DC 20375 USA.
RP Pruessner, MW (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 5
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5184-5
PY 2009
BP 3065
EP 3066
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BNJ62
UT WOS:000274751302518
ER
PT B
AU Guyette, AC
AF Guyette, Andrew C.
GP IEEE
TI Alternative Architectures for Narrowband Varactor-Tuned Bandpass Filters
SO 2009 EUROPEAN MICROWAVE CONFERENCE, VOLS 1-3
LA English
DT Proceedings Paper
CT 37th European Microwave Conference
CY SEP 29-OCT 01, 2009
CL Rome, ITALY
AB A unique design approach for narrowband tunable bandpass filters is presented which focuses on engineering the tuned center-frequency dependence of the coupling coefficient between adjacent resonators. New architectures are presented, and equations for the coupling coefficient are derived from energy expressions. A microstrip prototype with independently-tunable center frequency and bandwidth was built and tested, and exhibits excellent performance.
C1 USN, Res Lab, Microwave Technol Branch, Washington, DC 20375 USA.
RP Guyette, AC (reprint author), USN, Res Lab, Microwave Technol Branch, Washington, DC 20375 USA.
EM andrew.guyette@nrl.navy.mil
NR 5
TC 9
Z9 9
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4748-0
PY 2009
BP 1828
EP 1831
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BNN89
UT WOS:000275097800462
ER
PT B
AU Guyette, AC
AF Guyette, Andrew C.
GP IEEE
TI Alternative Architectures for Narrowband Varactor-Tuned Bandpass Filters
SO 2009 EUROPEAN MICROWAVE INTEGRATED CIRCUITS CONFERENCE (EUMIC 2009)
LA English
DT Proceedings Paper
CT 4th European Microwave Integrated Circuits Conference
CY SEP 28-29, 2009
CL Rome, ITALY
AB A unique design approach for narrowband tunable bandpass filters is presented which focuses on engineering the tuned center-frequency dependence of the coupling coefficient between adjacent resonators. New architectures are presented, and equations for the coupling coefficient are derived from energy expressions. A microstrip prototype with independently-tunable center frequency and bandwidth was built and tested, and exhibits excellent performance.
C1 USN, Microwave Technol Branch, Res Lab, Washington, DC 20375 USA.
RP Guyette, AC (reprint author), USN, Microwave Technol Branch, Res Lab, Washington, DC 20375 USA.
EM andrew.guyette@nrl.navy.mil
NR 5
TC 5
Z9 5
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4749-7
PY 2009
BP 475
EP 478
PG 4
WC Computer Science, Hardware & Architecture; Computer Science,
Interdisciplinary Applications; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BOD02
UT WOS:000276213900120
ER
PT B
AU Schaum, A
AF Schaum, A.
GP IEEE
TI REMOTE SPECTRAL DETECTION USING A LABORATORY SIGNATURE
SO 2009 FIRST WORKSHOP ON HYPERSPECTRAL IMAGE AND SIGNAL PROCESSING:
EVOLUTION IN REMOTE SENSING
LA English
DT Proceedings Paper
CT 1st Workshop on Hyperspectral Image and Signal Processing - Evolution in
Remote Sensing
CY AUG 26-29, 2009
CL Grenoble, FRANCE
SP IEEE Geosci & Remote Sensing Soc
DE spectrum; signature; matched filter; affine
AB Two new algorithms are derived for remotely detecting a material characterized only by its laboratory spectrum. The methods are motivated by the practical difficulties in predicting an accurate field radiance from a reflectance. The first algorithm associates an affine subspace with the material, instead of a radiance point. The second algorithm is designed to prevent false alarms from dark pixels, to which the first algorithm may be sensitive. Both algorithms are ideally suited for use in conjunction with a simple method of vicarious calibration, which is also described.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Schaum, A (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4686-5
PY 2009
BP 372
EP 375
PG 4
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BOC66
UT WOS:000276190400092
ER
PT B
AU Fan, RE
Wottawa, C
Mulgaonkar, A
Boryk, RJ
Sander, TC
Wyatt, MP
Dutson, E
Grundfest, WS
Culjat, MO
AF Fan, Richard E.
Wottawa, Christopher
Mulgaonkar, Amit
Boryk, Richard J.
Sander, Todd C.
Wyatt, Marilynn P.
Dutson, Erik
Grundfest, Warren S.
Culjat, Martin O.
GP IEEE
TI Pilot Testing of a Haptic Feedback Rehabilitation System on a Lower-limb
Amputee
SO 2009 ICME INTERNATIONAL CONFERENCE ON COMPLEX MEDICAL ENGINEERING
LA English
DT Proceedings Paper
CT ICME International Conference on Complex Medical Engineering
CY APR 09-11, 2009
CL Tempe, AZ
SP ICME
AB Lower-limb amputation, whether by trauma or complication of another condition, affects more than 800,000 people in the United States alone. These patient groups typically suffer from decreased mobility and an increased incidence of injury due to fall, even with the application of prosthetic limbs. A haptic feedback system prototype was previously developed to provide augmentative sensory information to patients suffering from total or attenuated lower-limb sensory loss. By providing tactile cues to the user based on plantar pressure distributions, it is hoped that this system can improve rehabilitation and functional outcomes following lower-limb injury. This paper presents an updated system that was fitted to the residual limb of a below-knee amputee, as well as a pilot study using the device. The pilot study demonstrated that the amputee could accurately perceive various tactile stimuli with high accuracy (>87.5%), therefore indicating that the approach is feasible.
C1 [Fan, Richard E.; Wottawa, Christopher; Mulgaonkar, Amit] Univ Calif Los Angeles, Biomed Engn IDP, Los Angeles, CA 90095 USA.
[Boryk, Richard J.] Univ Calif Los Angeles, Rehabil Serv Dept, Los Angeles, CA USA.
[Sander, Todd C.] Univ Calif Los Angeles, Naval Hlth Res Ctr, San Diego, CA USA.
[Wyatt, Marilynn P.] Univ Calif Los Angeles, Naval Med Ctr, San Diego, CA USA.
[Dutson, Erik; Grundfest, Warren S.; Culjat, Martin O.] Univ Calif Los Angeles, CASIT, Dept Bioengn &Surg, Los Angeles, CA USA.
RP Fan, RE (reprint author), Univ Calif Los Angeles, Biomed Engn IDP, Los Angeles, CA 90095 USA.
EM rfan@ucla.edu
NR 21
TC 1
Z9 1
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3315-5
PY 2009
BP 476
EP +
PG 2
WC Engineering, Biomedical; Neuroimaging; Radiology, Nuclear Medicine &
Medical Imaging
SC Engineering; Neurosciences & Neurology; Radiology, Nuclear Medicine &
Medical Imaging
GA BMF84
UT WOS:000272211300094
ER
PT B
AU Tait, G
Slocum, M
Richardson, R
AF Tait, Gregory
Slocum, Michael
Richardson, Robert
GP IEEE
TI A Model to Predict Reverberant Decay Time in Reflective Spaces for
Wireless Applications
SO 2009 IEEE 10TH ANNUAL WIRELESS AND MICROWAVE TECHNOLOGY CONFERENCE
LA English
DT Proceedings Paper
CT 10th Annual IEEE Wireless and Microwave Technology Conference
CY APR 20-21, 2009
CL Clearwater, FL
SP IEEE
ID CHAMBER; ROOM
AB A simple model for predicting the characteristic energy decay time of wireless RF emissions in confined, reflective spaces is presented Based on this cavity decay time, accurate estimates of room quality factor, diffuse (multi-path) insertion loss, and average electric field components are possible. Spaces of interest for model applications include aircraft cabins, below-deck compartments in ships, automobile interiors and metallic building or room enclosures. Decay time predictions are shown to be in excellent agreement with measured data from two different reverberant spaces over the 1-14 GHz frequency range.
C1 [Tait, Gregory; Slocum, Michael; Richardson, Robert] USN, Surface Warfare Ctr Dahlgren, Electromagnet & Sensor Syst Dept, Dahlgren, VA 22448 USA.
RP Tait, G (reprint author), USN, Surface Warfare Ctr Dahlgren, Electromagnet & Sensor Syst Dept, Dahlgren, VA 22448 USA.
EM gregory.tait@navy.mil
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4564-6
PY 2009
BP 6
EP 10
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BMN91
UT WOS:000272995600002
ER
PT B
AU Fargues, MP
AF Fargues, Monique P.
GP IEEE
TI AN APPLICATION-BASED APPROACH TO PRESENTING RANDOM DSP CONCEPTS TO A NON
TRADITIONAL STUDY BODY
SO 2009 IEEE 13TH DIGITAL SIGNAL PROCESSING WORKSHOP & 5TH IEEE PROCESSING
EDUCATION WORKSHOP, VOLS 1 AND 2, PROCEEDINGS
LA English
DT Proceedings Paper
CT 13th IEEE Digital Signal Processing Workshop/5th IEEE Signal Processing
Education Workshop
CY JAN 04-07, 2009
CL Marco Isl, FL
SP IEEE, IEEE Signal Proc Soc
DE Signal processing; education
ID EDUCATION
AB Naval Postgraduate School (NPS) students have on average been out of school for several years and come from a wide range of backgrounds but also have a common work experience. This paper discusses the challenges faced by faculty in teaching a first year graduate-level discrete time random signals course offered for students enrolled towards the MSEE Degree at NPS and the steps taken to facilitate student understanding of the topics covered in the course. We describe our student hands-on approach designed to emphasize applications and report our findings.
C1 USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
RP Fargues, MP (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
EM fargues@nps.edu
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3676-7
PY 2009
BP 747
EP 752
DI 10.1109/DSP.2009.4786021
PG 6
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BKB98
UT WOS:000267715800137
ER
PT S
AU Chou, YC
Chang-Chien, P
Yang, JM
Nishimoto, MY
Hennig, K
Lange, MD
Zeng, X
Parlee, MR
Lin, CH
Lee, LS
Nam, PS
Wojtowicz, M
Barsky, ME
Oki, AK
Boos, JB
Bennett, BR
Papanicolaou, NA
AF Chou, Y. C.
Chang-Chien, P.
Yang, J. M.
Nishimoto, M. Y.
Hennig, K.
Lange, M. D.
Zeng, X.
Parlee, M. R.
Lin, C. H.
Lee, L. S.
Nam, P. S.
Wojtowicz, M.
Barsky, M. E.
Oki, A. K.
Boos, J. B.
Bennett, B. R.
Papanicolaou, N. A.
GP IEEE
TI MANUFACTURABLE TRI-STACK ALSB/INAS HEMT LOW-NOISE AMPLIFIERS USING
WAFER-LEVEL-PACKAGING TECHNOLOGY FOR LIGHT-WEIGHT AND ULTRALOW-POWER
APPLICATIONS
SO 2009 IEEE 21ST INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE & RELATED
MATERIALS (IPRM)
SE International Conference on Indium Phosphide and Related Materials
LA English
DT Proceedings Paper
CT 21st International Conference on Indium Phosphide and Related Materials
CY MAY 10-14, 2009
CL Newport Beach, CA
SP IEEE
DE wafer-level-packaging; HEMT; ultralow-power; AlSb/InAs
ID INAS/ALSB HEMT; TRANSISTORS
AB A wafer-level-packaging technology was used to integrate the 0.1 mu m AlSb/InAs HEMT low-noise amplifiers with power amplifiers, switches and phase shifters to form a compact tri-stack transmit/receive module for light-weight and ultralow-power applications. The high manufacturability of AlSb/InAs HEMT receivers operating at 0.9 mW was demonstrated on a tri-stack wafer. This demonstration of manufacturable tri-stack transmit/receive modules is essential for phased-array applications requiring light weight and ultralow power.
C1 [Chou, Y. C.; Chang-Chien, P.; Yang, J. M.; Nishimoto, M. Y.; Hennig, K.; Lange, M. D.; Zeng, X.; Parlee, M. R.; Lin, C. H.; Lee, L. S.; Nam, P. S.; Wojtowicz, M.; Barsky, M. E.; Oki, A. K.] Northrop Grumman Corp, Redondo Beach, CA 90278 USA.
[Boos, J. B.; Bennett, B. R.; Papanicolaou, N. A.] Naval Res Lab, Washington, DC 20375 USA.
RP Chou, YC (reprint author), Northrop Grumman Corp, Redondo Beach, CA 90278 USA.
EM yeong-chang.chou@ngc.com
RI Bennett, Brian/A-8850-2008
OI Bennett, Brian/0000-0002-2437-4213
FU DARPA [FA8750-06-C-0051]
FX This work is supported by DARPA under contract number FA8750-06-C-0051.
The authors would like to thank Dr. Mark Rosker (DARPA) and all the
engineers and technicians at Northrop Grumman Space Technology who
contributed to this work.
NR 11
TC 0
Z9 1
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1092-8669
BN 978-1-4244-3432-9
J9 CONF P INDIUM PHOSPH
PY 2009
BP 200
EP +
DI 10.1109/ICIPRM.2009.5012478
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BLM48
UT WOS:000270539400053
ER
PT B
AU Lintz, WA
McEachen, JC
Tummala, M
AF Lintz, William A.
McEachen, John C.
Tummala, Murali
GP IEEE
TI SENSOR BEAMFORMING WITH DISTRIBUTED MOBILE ELEMENTS IN A WIRELESS SENSOR
NETWORK
SO 2009 IEEE 22ND CANADIAN CONFERENCE ON ELECTRICAL AND COMPUTER
ENGINEERING, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 22nd IEEE Canadian Conference on Electrical and Computer Engineering
CY MAY 03-06, 2009
CL St Johns, CANADA
SP IEEE
DE mobile element arrays; beamforming; wireless sensor networks
AB Sensor array beamforming performance using independently mobile antennas connected through a wireless sensor network is analyzed where a performance metric is proposed enabling mitigation of the perturbation of array factor formation caused by dynamic node positions. Wireless networking has expanded array design possibilities to include wirelessly connected elements; however, static positioning of elements remains central to determination and application of weights necessary for coherent array beam formation. Wireless networks allow for participant mobility, but applied weights must be reformed for each position update in order to maintain target focus. While deterministic motion allows easy weight translation, random element motion requires significant network energy to reform weights through position updates. The relationship between array factor and stochastic element motion is analyzed. A relationship is developed between motion and array factor magnitude probability towards the intended target vector. The relationship proposed is shown to be assessable and useful for reducing network traffic and processing overhead and while producing operationally acceptable gain towards the target. The result compares favorably against a constant position updating model in terms of sensor energy usage across the network.
C1 [Lintz, William A.; McEachen, John C.; Tummala, Murali] USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
RP Lintz, WA (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, 1 Univ Circle, Monterey, CA 93943 USA.
EM walintz@nps.edu; mceachen@nps.edu; mtummala@nps.edu
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3509-8
PY 2009
BP 164
EP 169
PG 6
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BMC07
UT WOS:000271823600034
ER
PT S
AU Marsh, CL
Braun, RD
AF Marsh, Christopher L.
Braun, Robert D.
GP IEEE
TI Fully-Propulsive Mars Atmospheric Transit Strategies for High-Mass
Payload Missions
SO 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT 2009 IEEE Aerospace Conference
CY MAR 07-14, 2009
CL Big Sky, MT
ID DESCENT; ENTRY; EXPLORATION
AB A systems analysis focused on the use of propulsion during entry, descent, and landing at Mars is presented. The propellant mass fractions of various fully-propulsive EDL strategies are presented. A key aspect of the study is the propellant costs of meeting specified heat rate constraints and the trade between TPS mass and technology requirements vs those for propulsive deceleration. Propulsive strategies considered include a constant-thrust gravity turn as well as variable-thrust trajectory designs. A control law for heat rate constrained trajectories is provided. Sensitivity to the vehicle's propulsive capabilities is explored. A comparison is presented between the fully-propulsive EDL architecture and EDL systems in which significant aeroassist technology is employed. With this information, an overview of the impact of a fully-propulsive EDL system on spacecraft design and functionality is offered.(1 2)
C1 [Marsh, Christopher L.] USN, Stennis Space Ctr, MS 39529 USA.
[Braun, Robert D.] Georgia Inst Technol, Atlanta, GA 30332 USA.
RP Marsh, CL (reprint author), USN, Stennis Space Ctr, MS 39529 USA.
EM christopher.l.marsh@gatech.edu; robert.braun@ae.gatech.edu
NR 26
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4244-2621-8
J9 AEROSP CONF PROC
PY 2009
BP 472
EP +
PG 3
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA BME07
UT WOS:000271964000044
ER
PT S
AU Li, WH
Chen, GS
Blasch, E
Lynch, R
AF Li, Wenhua
Chen, Genshe
Blasch, Erik
Lynch, Robert
GP IEEE
TI Cognitive MIMO Sonar Based Robust Target Detection for Harbor and
Maritime Surveillance Applications
SO 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT 2009 IEEE Aerospace Conference
CY MAR 07-14, 2009
CL Big Sky, MT
ID RADAR; STAP
AB Robust detection of various hostile threats is vital to protect Navy ships and other facilities within harbor and maritime environments. Traditional single-input single-output (SISO) sonar transmits single acoustic waveform by single projector, which has a few disadvantages including low target detection probability, low resolution, vulnerability of interception by the enemy, sensitivity to jamming, etc. Multi-input multi-output (MIMO), typically applied to communications and radar solutions, is an emerging technology that can be applied to sonar to overcome many of the SISO sonar disadvantages. In this paper, cognitive monostatic/bistatic/multistatic MIMO sonar approaches are proposed. MIMO sonar transmits different orthogonal acoustic waveforms from multiple projectors with different spatial distributions. Through space-time-waveform diversity, MIMO sonar is able to apply coherent processing techniques over the received signals, and acquires more diversity gains. The cognition concept proposed in the literature for radar and wireless communication is applied to MIMO sonar to improve its robustness and adaptability. The advantages of proposed cognitive MIMO sonar will be demonstrated by Monte Carlo computer simulations and compared to the SISO techniques.(12)
C1 [Li, Wenhua; Chen, Genshe] DCM Res Resources LLC, Germantown, MD 20874 USA.
[Blasch, Erik] US Air Force, Res Lab, Wright Patterson AFB, OH 45433 USA.
[Lynch, Robert] Naval undersea warfare Ctr, Newport, RI 02841 USA.
RP Li, WH (reprint author), DCM Res Resources LLC, Germantown, MD 20874 USA.
EM gchen@dcmresearchresources.com; erik.blasch@wpafb.af.mil;
robert.s.lynch@navy.mil
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4244-2621-8
J9 AEROSP CONF PROC
PY 2009
BP 1639
EP +
PG 3
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA BME07
UT WOS:000271964000167
ER
PT S
AU Badgett, C
Merski, N
Hurley, M
Jaffe, P
Walden, H
Lopez, A
Pierce, M
Kaufman, D
AF Badgett, Christopher
Merski, Nicholas
Hurley, Michael
Jaffe, Paul
Walden, Hallie
Lopez, Alan
Pierce, Michael
Kaufman, David
GP IEEE
TI STP-SIV and ORS ISET Spacecraft-To-Payload Interface Standards
SO 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT 2009 IEEE Aerospace Conference
CY MAR 07-14, 2009
CL Big Sky, MT
AB Spacecraft standards can enable dramatic reduction in the cost, schedule, and risk of spaceflight. After the first build of a standard spacecraft the non-recurring engineering is complete which allows rapid, cost-effective production of subsequent units. Spacecraft standards can increase the supplier base by encouraging multiple organizations to build components, subsystems, or spacecraft according to the same standard. Interface standards promote rapid and low-risk integration. The Space Development and Test Wing (SDTW) of the Space and Missile Systems Center (SMC); and the Naval Research Laboratory (NRL), Applied Physics Laboratory (APL), and a consortium of aerospace industry and academia partners have developed standards for two independent projects with different, yet synergistic goals. SDTW leads the Space Test Program-Standard Interface Vehicle (STP-SIV) program with prime contractor Ball Aerospace & Technologies Corp (Ball Aerospace). STP-SIV is a small spacecraft bus with well-defined and documented standard interfaces to the payload, ground, and launch vehicle (LV). STP-SIV is designed to provide low cost space access to the science and technology (S&T) community. NRL leads the Operationally Responsive Space (ORS) standard bus development. The ORS bus standards were developed by the Integrated System Engineering Team (ISET) consisting of technical experts from over a dozen government and industry partners, chartered with generating standards for production of responsive spacecraft buses for the ORS Program Office.
Both programs provide to the space community well-defined standard spacecraft (SC) to payload (PL) interfaces on which to base future PL designs. Rather than designing a unique SC for each payload; the standards provide adaptable interfaces to accommodate a range of payloads. STP-SIV offers a Payload User's Guide (PLUG) which defines the mechanical, thermal, power and data interfaces to help facilitate PL design and integration. Similarly, the ISET developed a Payload Developers Guide (PDG) describing capabilities and interface requirements for the ORS standard. Ball Aerospace has been contracted to standardize the ORS PDG such that the payload interface information and document organization follow the same outline and similar content as the STP-SIV PLUG. The complementary documents, including a payload questionnaire, along with a merged "flysheet" table containing summary-level capabilities of each platform will aid payload providers in selecting the appropriate spacecraft platform to host their payloads. This paper focuses on standard payload hosting capabilities, described in STP-SIV PLUG and ORS PDG, and the benefits of standardization of these small space vehicle platforms to the S&T, ORS, and other aerospace communities. (1 2)
C1 [Badgett, Christopher; Merski, Nicholas] DOD Space Test Program, Space & Missile Syst Ctr, 3548 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
[Hurley, Michael; Jaffe, Paul] Naval Res Lab, Washington, DC 20375 USA.
[Walden, Hallie; Lopez, Alan; Pierce, Michael; Kaufman, David] Ball Aerosp & Technol Corp, Boulder, CO 80301 USA.
RP Badgett, C (reprint author), DOD Space Test Program, Space & Missile Syst Ctr, 3548 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA.
EM christopher.badgett@kirtland.af.mil; nicholas.merski@kirtland.af.mil;
michael.hurley@nrl.navy.mil; paul.jaffe@nrl.navy.mil; hwalden@ball.com;
alopez@ball.com; mpierce@ball.com; dakaufma@ball.com
NR 12
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4244-2621-8
J9 AEROSP CONF PROC
PY 2009
BP 2558
EP +
PG 3
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA BME07
UT WOS:000271964001001
ER
PT S
AU Westervelt, K
AF Westervelt, Kerry
GP IEEE
TI Systems Engineering Approach to Integrated Diagnostics Requirements
SO 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT 2009 IEEE Aerospace Conference
CY MAR 07-14, 2009
CL Big Sky, MT
AB Establishing(1,2) comprehensive requirements for integrated diagnostics both onboard and off-board the aircraft is vital to providing a supportable weapon system. Each user group takes advantage of integrated diagnostics to fulfill their roles and responsibilities. Aircrew utilize Built-In-Test (BIT) to monitor the health of the aircraft for mission accomplishment; maintainers interpret diagnostic indications to service and repair the aircraft; and engineers examine the diagnostics information to conduct root cause analysis and perform engineering investigations of various failure modes. Standardizing health and usage data across aircraft platforms allows common tools to process the data for each group's needs eliminating stovepipe systems for each aircraft type.
C1 USN, Air Syst Command, Patuxent River, MD 20670 USA.
RP Westervelt, K (reprint author), USN, Air Syst Command, 47123 Buse Rd, Patuxent River, MD 20670 USA.
EM kerry.westervelt@navy.mil
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4244-2621-8
J9 AEROSP CONF PROC
PY 2009
BP 3477
EP 3485
PG 9
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA BME07
UT WOS:000271964001093
ER
PT S
AU Millar, RC
AF Millar, Richard C.
GP IEEE
TI Defining Requirements for Advanced PHM Technologies for Optimal
Reliability Centered Maintenance
SO 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT 2009 IEEE Aerospace Conference
CY MAR 07-14, 2009
CL Big Sky, MT
AB Condition Based Maintenance Plus (CBM+) can be described as optimal condition based maintenance (CBM) procedures defined by applying the principles and process of Reliability Centered Maintenance. This approach offers a rigorous and disciplined method, based on the system FMECA, to determine the least cost maintenance policy and procedures that are consistent with acceptable levels of safety and readiness, applying available prognosis and health management tools.
It is argued that the same process is the preferred method to define requirements for advanced PHM technologies based on RCM derived capability gaps, preferably accounting for synergies with concurrent continuous (maintenance) process improvement. There may be synergies in coupling this process with Continuous Process Improvement programs, such as NAVAIR's AIRSPEED.
In discussing this proposed approach, several issues are addressed. The first is the question of interdependence between incommensurable safety, affordability and readiness objectives and metrics.
The second is the problem of uncertainty in the FMECA failure modes and probabilities until the system and equipment has accumulated considerable service history, while still subject to the emergence or aggravation of failure modes by mission exposure, component deterioration, quality escapes and intentional configuration change.
In practice it may be necessary to fall back on less rigorous (semi)qualitative methods to target innovation. In any case, more adaptable PHM architectures are needed to mitigate inevitable uncertainty in requirements..
Note: the terms equipment health management (also, more specifically, engine health management) [EHM] and prognostic health management (or prognosis and health management) [PHM] are used with little distinction in this paper, but in general PHM is restricted to methods generating estimates of remaining useful life.(1 2 3)
C1 USN, Postgrad Sch, Dept Syst Engn, Patuxent River, MD 20670 USA.
RP Millar, RC (reprint author), USN, Postgrad Sch, Dept Syst Engn, 22783 Cedar Point Rd, Patuxent River, MD 20670 USA.
EM rcmillar@nps.edu
NR 7
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4244-2621-8
J9 AEROSP CONF PROC
PY 2009
BP 3785
EP 3791
PG 7
WC Engineering, Aerospace; Engineering, Electrical & Electronic
SC Engineering
GA BME07
UT WOS:000271964001123
ER
PT B
AU Kindt, R
Pickles, R
AF Kindt, Rick
Pickles, Ray
GP IEEE
TI 12-to-1 Bandwidth All-Metal Vivaldi Array Element
SO 2009 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM AND
USNC/URSI NATIONAL RADIO SCIENCE MEETING, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Antennas and Propagation International Symposium /USNC/URSI
National Radio Science Meeting
CY JUN 01-05, 2009
CL N Charleston, SC
SP IEEE, USNC, URSI
C1 [Kindt, Rick; Pickles, Ray] USN, Res Lab, Washington, DC 20375 USA.
RP Kindt, R (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM rick.kindt@nrl.navy.mil
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3646-0
PY 2009
BP 2819
EP 2822
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BON71
UT WOS:000277085401235
ER
PT B
AU Kindt, R
Kragalott, M
AF Kindt, Rick
Kragalott, Mark
GP IEEE
TI A Wavelength-Scaled Ultra-Wide Bandwidth Array
SO 2009 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM AND
USNC/URSI NATIONAL RADIO SCIENCE MEETING, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Antennas and Propagation International Symposium /USNC/URSI
National Radio Science Meeting
CY JUN 01-05, 2009
CL N Charleston, SC
SP IEEE, USNC, URSI
C1 [Kindt, Rick; Kragalott, Mark] USN, Res Lab, Washington, DC 20375 USA.
RP Kindt, R (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM rick.kindt@nrl.navy.mil
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3646-0
PY 2009
BP 2823
EP 2826
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BON71
UT WOS:000277085401236
ER
PT B
AU Lippincott, WL
AF Lippincott, Wendy L.
GP IEEE
TI Design of a Broadband Zig-Zag Pyramidal Log-Periodic Antenna
SO 2009 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM AND
USNC/URSI NATIONAL RADIO SCIENCE MEETING, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Antennas and Propagation International Symposium /USNC/URSI
National Radio Science Meeting
CY JUN 01-05, 2009
CL N Charleston, SC
SP IEEE, USNC, URSI
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Lippincott, WL (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3646-0
PY 2009
BP 3355
EP 3358
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BON71
UT WOS:000277085401369
ER
PT S
AU Boxerbaum, AS
Klein, MA
Quinn, RBRD
Harkins, R
Vaidyanathan, R
AF Boxerbaum, Alexander S.
Klein, Matthew A.
Quinn, Richard Bachmann Roger D.
Harkins, Richard
Vaidyanathan, Ravi
GP IEEE
TI Design of a Semi-Autonomous Hybrid Mobility Surf-Zone Robot
SO 2009 IEEE/ASME INTERNATIONAL CONFERENCE ON ADVANCED INTELLIGENT
MECHATRONICS, VOLS 1-3
SE IEEE ASME International Conference on Advanced Intelligent Mechatronics
LA English
DT Proceedings Paper
CT IEEE/ASME International Conference on Advanced Intelligent Mechatronics
CY JUL 14-17, 2009
CL Singapore, SINGAPORE
SP IEEE, ASME
DE Biologically inspired robotics; legged vehicles; field robotics;
amphibious operation; reduced actuation; passive mechanisms; advanced
mobility; autonomous control
AB Surf-zone environments pose extreme challenges to robot operation. A robot that could autonomously navigate through the rocky terrain, constantly changing underwater currents, hard-packed moist sand, and loose dry sand characterizing this environment, would have very significant utility for a range of defence and civilian missions. The study of animal locomotion mechanisms can elucidate specific movement principles that can be applied to address these demands. In this work, we report on the design and optimization of a biologically inspired autonomous robot for deployment and operation in an ocean beach environment. Based on recent success with beach environment autonomy and a new rugged waterproof robotic platform, we propose a new design that will fuse a range of insect-inspired passive mechanisms with active autonomous control architectures to seamlessly adapt to and traverse through a range of challenging substrates both in and out of the water.
C1 [Boxerbaum, Alexander S.; Klein, Matthew A.; Quinn, Richard Bachmann Roger D.] Case Western Reserve Univ, Dept Mech Engn, Cleveland, OH 44107 USA.
[Harkins, Richard] US Navy, Postgrad Sch, Dept Phys, Monterey, CA 93943 USA.
[Vaidyanathan, Ravi] US Navy, Postgrad Sch, Monterey, CA 93943 USA.
[Vaidyanathan, Ravi] Univ Bristol, Dept Mech Engn, Bristol BS8 1TR, Avon, England.
RP Boxerbaum, AS (reprint author), Case Western Reserve Univ, Dept Mech Engn, Cleveland, OH 44107 USA.
EM asb22@case.edu; m.kline@case.edu; rdq@case.edu; rharkins@nps.edu;
r.vaidyanathan@bristol.ac.uk
FU Temesek Defense Systems Institute; National University of Singapore
FX This work was supported by the Temesek Defense Systems Institute,
National University of Singapore
NR 22
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U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2159-6255
BN 978-1-4244-2852-6
J9 IEEE ASME INT C ADV
PY 2009
BP 974
EP +
DI 10.1109/AIM.2009.5229713
PG 2
WC Automation & Control Systems; Computer Science, Artificial Intelligence;
Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Automation & Control Systems; Computer Science; Engineering
GA BON35
UT WOS:000277062800166
ER
PT S
AU Lock, RJ
Vaidyanathan, R
Burgess, SC
Quinn, RD
AF Lock, Richard J.
Vaidyanathan, Ravi
Burgess, Stuart C.
Quinn, Roger D.
GP IEEE
TI Impact of Passive Stiffness Variation on Stability and Mobility of a
Hexapod Robot
SO 2009 IEEE/ASME INTERNATIONAL CONFERENCE ON ADVANCED INTELLIGENT
MECHATRONICS, VOLS 1-3
SE IEEE ASME International Conference on Advanced Intelligent Mechatronics
LA English
DT Proceedings Paper
CT IEEE/ASME International Conference on Advanced Intelligent Mechatronics
CY JUL 14-17, 2009
CL Singapore, SINGAPORE
SP IEEE, ASME
ID KINEMATICS; LOCOMOTION
AB This paper presents a biologically inspired approach to simulation design for a walking hexapod robot with focus on the parameter selection of critical values (e.g. joint stiffness) for robot performance. The fundamental aim is to mimic key aspects within a dynamic simulation environment to develop a clearer picture of the tradeoffs that biological systems naturally regulate. Although the importance of compliance in locomotion and disturbance rejection is well established in robotics, the actual design selection of system parameters involving tradeoffs between active movement, passive disturbance rejection, and energy minimization remain a challenging design task for mobile robots. We present initial work aimed at resolving this issue for the design optimization of a 20:1 scale Blaberus discoidalis cockroach robot through a simulation environment where complex interactions between passive stabilization and active walking may be examined in detail with respect to energy consumption and robotic performance.
C1 [Lock, Richard J.; Vaidyanathan, Ravi; Burgess, Stuart C.] Univ Bristol, Dept Mech Engn, Bristol BS8 1TR, Avon, England.
[Vaidyanathan, Ravi] US Navy, Postgrad Sch, Monterey, CA 93943 USA.
[Quinn, Roger D.] Case Western Reserve Univ, Dept Mech Engn, Cleveland, OH 44107 USA.
RP Lock, RJ (reprint author), Univ Bristol, Dept Mech Engn, Bristol BS8 1TR, Avon, England.
EM Richard.Lock@bristol.ac.uk; r.vaidyanathan@bristol.ac.uk;
S.C.Burgess@bristol.ac.uk; rdq@case.edu
FU UK Engineering and Physical Sciences Research Council (EPSRC) Doctoral
Training Assi stantship (DTA) Program
FX The authors acknowledge the support of the UK Engineering and Physical
Sciences Research Council (EPSRC) Doctoral Training Assi stantship (DTA)
Program and Mr. Seun Araromi for performance and research insights. We
also express our gratitude to Professor Sasha Zill at Marshall
University for photographs of the cockroach tarsus and Dr. Daniel
Kingsley for his work on Robot-V, whose structure provided the basis of
design for this wor
NR 11
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U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2159-6255
BN 978-1-4244-2852-6
J9 IEEE ASME INT C ADV
PY 2009
BP 980
EP +
DI 10.1109/AIM.2009.5229714
PG 2
WC Automation & Control Systems; Computer Science, Artificial Intelligence;
Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Automation & Control Systems; Computer Science; Engineering
GA BON35
UT WOS:000277062800167
ER
PT B
AU Preiss, SA
Roderick, A
AF Preiss, Stephen A.
Roderick, Andrea
GP IEEE
TI Handheld Radar Simulator: The Future of RF Testing
SO 2009 IEEE AUTOTESTCON
LA English
DT Proceedings Paper
CT Annual IEEE AUTOTESTCON Conference
CY SEP 14-17, 2009
CL Anaheim, CA
SP IEEE
DE Radio Frequency; Handheld Radar Simulator; RF Testing; Radar Warning
Receiver; Electronic Support Measure; JSECST; Electronic Warfare
AB Due to budgetary and economic constraints, the Department of Defense (DOD) has taken the "neck down" approach to all areas of military procurement. Commonality has been the buzzword across all services from major aircraft and weapon systems down to the Support Equipment (SE) used to maintain those systems. In the aircraft world, the Joint Service Electronic Combat System Test Set (JSECST) has proliferated across the world replacing many older systems. In the weapons world, the Common Munitions BIT Reprogramming Equipment (CMBRE) has performed a similar function. Despite all these efforts, one area that has not been addressed is the need for a common portable Radio Frequency (RF) tester that would eliminate many redundant systems out in the field. However, that was only the first part; there was also a need for the RF portable tester to be able to perform in high Electromagnetic Interference (EMI) environments, which was considered a significant technical challenge. The unit also had to be reprogrammable to provide "threat of the day" testing scenarios. The maintainer in the field has never before been required to perform this "threat of the day" type of testing. This paper offers insight into the challenges of successful Navy and Marine Corp RF testing of aircraft in the high EMI environment of an aircraft carrier. The Handheld Radar Simulator (HRS) addresses those needs. This paper discusses the management and technical challenges in developing a common test solution that HRS offers as a standardized RF portable tester. Although currently under development and subject to change, the design and concept or operations has already been firmly established. This papers intent is to enlighten the test community of this new and exciting program that will shape the future direction of RF testing for years to come.
C1 [Preiss, Stephen A.; Roderick, Andrea] USN, Air Warfare Ctr, Weap Div, Point Mugu Nawc, CA 93042 USA.
RP Preiss, SA (reprint author), USN, Air Warfare Ctr, Weap Div, Point Mugu Nawc, CA 93042 USA.
EM stephen.preiss@navy.mil; andrea.roderick@navy.mil
NR 1
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U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4980-4
PY 2009
BP 259
EP 264
PG 6
WC Automation & Control Systems; Computer Science, Information Systems;
Computer Science, Theory & Methods
SC Automation & Control Systems; Computer Science
GA BNK02
UT WOS:000274771300052
ER
PT B
AU Shannon, R
Richardson, T
Koepping, C
Alwardt, AL
AF Shannon, Russell
Richardson, Thomas
Koepping, Craig
Alwardt, Anthony L.
GP IEEE
TI Lessons Learned in Implementing a Net-Centric Diagnostic Solution for
the F/A-18 Maintenance Environment
SO 2009 IEEE AUTOTESTCON
LA English
DT Proceedings Paper
CT Annual IEEE AUTOTESTCON Conference
CY SEP 14-17, 2009
CL Anaheim, CA
SP IEEE
DE Net-centric; Smart TPS; LXI; AME; F/A-18; ATFLIR; SHARP; ATML
AB The AN/USM-681 Electro-Optics Pallet/Pod Tester (EOPT) system has been the main on-aircraft support equipment (SE) item used to test and troubleshoot the AN/ASD-10 Advanced Tactical Aerial Reconnaissance System (ATARS), the AN/ASD-12 Shared Reconnaissance Pod (SHARP), and the AN/ASQ-228 Advanced Targeting Forward Looking Infrared (ATFLIR) Pod Because most of the technologies used by the EOPT are now obsolete, an SE item was needed to rep lace the EOPT system. As previously reported, developing a replacement for the EOPT was an opportunity to implement net-centric diagnostics within the F/A-18 automated maintenance environment (AME). This paper describes the second year of a two-year Technology Transition Initiative (TTI) in which the goals were to redesign the tester hardware to mitigate obsolescence by leveraging Local Area Network eXtensions for Instrumentation (LXI) technology, and to design a net-centric diagnostics framework (NCDF) to enable the bi-directional exchange of test data and maintenance data for smarter testing in both the on-aircraft and off-aircraff maintenance environments. This paper will focus on the practical realities of implementing a net-centric diagnostic solution in today's Navy/Marine Corps maintenance environment. This includes a report of the results of first article testing (FAT) as well as descriptions of the numerous design challenges, configuration management challenges, network challenges, and security challenges that were overcome, and those yet to be overcome, in order to move this technology from a working prototype to a fielded piece of support equipment.
C1 [Shannon, Russell; Richardson, Thomas; Koepping, Craig] USN, Air Syst Command, Highway 547, Lakehurst, NJ 08733 USA.
[Alwardt, Anthony L.] Boeing Co, St Louis, MO 63156 USA.
RP Shannon, R (reprint author), USN, Air Syst Command, Highway 547, Lakehurst, NJ 08733 USA.
EM russell.shannon@navy.mil; anthony.l.alwardt@boeing.com
FU Office of the Secretary of Defense (OSD) [PMA-265, PMA-260]
FX The authors wish to thank PMA-265, the Office of the Secretary of
Defense (OSD) and PMA-260 for their continued support. Additionally, the
authors wish to thank ATCS Michael E. Baker, Bill Wanamaker and the
maintainers of VFA-115 and VX-31 for facilitating successful test
events.
NR 6
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U2 0
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4980-4
PY 2009
BP 332
EP +
PG 2
WC Automation & Control Systems; Computer Science, Information Systems;
Computer Science, Theory & Methods
SC Automation & Control Systems; Computer Science
GA BNK02
UT WOS:000274771300065
ER
PT B
AU Morgan, M
DiBartolomeo, D
AF Morgan, Matthew
DiBartolomeo, Danny
GP IEEE
TI Key Considerations in the Design of an Integrated Diagnostics Test
Facility
SO 2009 IEEE AUTOTESTCON
LA English
DT Proceedings Paper
CT Annual IEEE AUTOTESTCON Conference
CY SEP 14-17, 2009
CL Anaheim, CA
SP IEEE
DE Diagnostics; Fault Detection; Fault Isolation; Laboratory Construction
AB Current inefficiencies in the United States Navy maintenance system have led to an increase in false removal maintenance actions. With the goal of reducing diagnostic ambiguity between multiple Weapons Replaceable Assemblies (WRAs) at the Organizational level of maintenance (O-Level), the Integrated Diagnostics and Automated Test Systems (IDATS) team at Naval Air Systems Command (NAVAIR) Lakehurst has established an integrated diagnostics test facility where avionics can be operated in an emulated maintenance environment. This paper describes the processes which were used to define, capture, document, and fulfill these requirements. Decisions were driven by these requirements, ranging from construction methods and materials to the selection of test equipment and test programming environment. The procedures followed and decisions made during the formation of this laboratory can serve as lessons learned and help form a road map for future facilities of this type.
C1 [Morgan, Matthew; DiBartolomeo, Danny] USN, Air Syst Command, Lakehurst, NJ 08733 USA.
RP Morgan, M (reprint author), USN, Air Syst Command, Lakehurst, NJ 08733 USA.
EM matthew.morgan1@navy.mil; danny.dibartolomeo@navy.mil
NR 11
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U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4980-4
PY 2009
BP 428
EP 432
PG 5
WC Automation & Control Systems; Computer Science, Information Systems;
Computer Science, Theory & Methods
SC Automation & Control Systems; Computer Science
GA BNK02
UT WOS:000274771300084
ER
PT B
AU Sauter, JA
Mathews, RS
Neuharth, K
Robinson, JS
Moody, J
Riddle, S
AF Sauter, John A.
Mathews, Robert S.
Neuharth, Kris
Robinson, Joshua S.
Moody, John
Riddle, Stephanie
GP IEEE
TI Demonstration of Swarming Control of Unmanned Ground and Air Systems in
Surveillance and Infrastructure Protection
SO 2009 IEEE CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY
LA English
DT Proceedings Paper
CT IEEE Conference on Technologies for Homeland Security
CY MAY 11-12, 2009
CL Waltham, MA
SP IEEE
AB The emergence of new risks to homeland security requires a greater reliance on innovative remote sensing and monitoring systems deployed on Unmanned Vehicles (UxVs) for protecting borders and critical infrastructure. Robust autonomous control technologies that can reliably coordinate these sensors and platforms are needed. We describe a class of algorithms based on digital pheromones that enables robust, complex, intelligent behavior. These algorithms have been implemented on a variety of UxVs and sensor platforms and demonstrated in surveillance and infrastructure protection applications. The algorithms autonomously adapt to a rapidly changing environment as well as failures or changes in the composition of the sensor assets. They can support mixed manned and unmanned teaming environments. An Operator System Interface (OSI) enables a single operator to monitor and manage the system. We describe the results from various tests and the challenges faced in implementing these algorithms on actual hardware.
C1 [Sauter, John A.; Mathews, Robert S.; Neuharth, Kris] TechTeam Govt Solut, 3520 Green Court,Suite 250, Ann Arbor, MI 48105 USA.
[Robinson, Joshua S.; Moody, John] Augusta Syst, Morgantown, WV 26505 USA.
[Riddle, Stephanie] NAVAIR, St Marys City, MD 20670 USA.
RP Sauter, JA (reprint author), TechTeam Govt Solut, 3520 Green Court,Suite 250, Ann Arbor, MI 48105 USA.
EM john.sauter@newvectors.net; robert.matthews@newvectors.net;
kris.neuharth@newvectors.net; jrobinson@augustasystems.com;
jmoody@augustasystems.com; stephanie.riddle@navy.mil
FU NAVAIR
FX This paper is based on work supported by NAVAIR with Augusta Systems as
the prime contractor. NAVAIR Public Release 09-212. Distribution:
Statement A Approved for public release; distribution is unlimited. The
views and conclusions in this document are those of the authors and
should not be interpreted as representing the official policies, Either
expressed or implied, of the Department of Defense,or the US Government
NR 13
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4178-5
PY 2009
BP 51
EP +
DI 10.1109/THS.2009.5168014
PG 2
WC Computer Science, Information Systems; Computer Science, Theory &
Methods; Engineering, Electrical & Electronic; Physics, Applied
SC Computer Science; Engineering; Physics
GA BMZ02
UT WOS:000273959900008
ER
PT B
AU Faulkner, L
Granger, R
Hurst, P
Jankowski, W
Steinbrecher, D
Tattersall, J
AF Faulkner, Lynn
Granger, Richard
Hurst, Pamela
Jankowski, William
Steinbrecher, Donald
Tattersall, John
GP IEEE
TI Harbor Shield: A New Technique for Inspection of Vessels Below the
Waterline
SO 2009 IEEE CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY
LA English
DT Proceedings Paper
CT IEEE Conference on Technologies for Homeland Security
CY MAY 11-12, 2009
CL Waltham, MA
SP IEEE
AB In 2007, the Naval Undersea Warfare Center, Newport RI, Battelle, and EdgeTech Marine demonstrated acoustic imaging of ships' underhulls from a fixed sensor while the ship was underway. This served as proof of concept for a maritime security development called "Harbor Shield." At present, inspection by divers is the only way to detect and classify objects attached to ships' hulls. Harbor Shield, which inspects moving ships from a stationary portal instead of using mobile ROVs or divers to inspect stationary targets, may dramatically increase shipping inspection rates while reducing the commercial impact of inspections. The 2007 data was used to develop techniques to optimize image extraction from the single sensor then used. A developmental single transmitter/multiple-receiver sonar system should allow three-dimensional imaging of the underhulls of ships while underway. Current efforts focus on development of a prototype portal to generate data needed to optimize design and operation.
C1 [Faulkner, Lynn; Granger, Richard; Hurst, Pamela] Battelle Mem Inst, 505 King Ave, Columbus, OH 43201 USA.
[Jankowski, William; Steinbrecher, Donald; Tattersall, John] Naval Undersea Warfare Ctr, Newport, RI USA.
RP Faulkner, L (reprint author), Battelle Mem Inst, 505 King Ave, Columbus, OH 43201 USA.
EM Faulknel@Battelle.org; William.L.Jankowski@Navy.mil
NR 0
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U2 0
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4178-5
PY 2009
BP 213
EP +
PG 2
WC Computer Science, Information Systems; Computer Science, Theory &
Methods; Engineering, Electrical & Electronic; Physics, Applied
SC Computer Science; Engineering; Physics
GA BMZ02
UT WOS:000273959900032
ER
PT B
AU de Nolfo, GA
Hunter, SD
Link, JT
Son, S
Guardala, NA
Stark, B
AF de Nolfo, Georgia A.
Hunter, Stanley D.
Link, Jason T.
Son, Seunghee
Guardala, Noel A.
Stark, Bob
GP IEEE
TI Neutron Imaging Camera
SO 2009 IEEE CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY
LA English
DT Proceedings Paper
CT IEEE Conference on Technologies for Homeland Security
CY MAY 11-12, 2009
CL Waltham, MA
SP IEEE
DE neutron imagaing; fast neutrons; SNM detection
ID CHAMBER
AB We describe the Neutron Imaging Camera (NIC) being developed for DTRA applications by NASA/GSFC and NSWC/CD. The NIC is based on the Three-Dimensional Track Imager (3-DTI) technology developed at GSFC for gamma-ray astrophysics applications. The 3-DTI, a large volume time-projection chamber, provides accurate -0.4 unit resolution, 3-D tracking of charged particles. The incident direction of fast neutrons, E-n greater than or similar to 0.1 MeV, are reconstructed from the momenta and energies or the proton and triton fragments resulting from He-3(n,p)H-3 interactions in the 3-DTI volume. We present angular resolution performance of the NIC derived from accelerator tests.
C1 [de Nolfo, Georgia A.; Hunter, Stanley D.; Link, Jason T.; Son, Seunghee] NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA.
[Guardala, Noel A.] NSWC, Carderock, West Bethesda, MD 20817 USA.
RP de Nolfo, GA (reprint author), NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA.
RI Hunter, Stanley/D-2942-2012; de Nolfo, Georgia/E-1500-2012
NR 9
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U2 1
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PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4178-5
PY 2009
BP 274
EP +
PG 2
WC Computer Science, Information Systems; Computer Science, Theory &
Methods; Engineering, Electrical & Electronic; Physics, Applied
SC Computer Science; Engineering; Physics
GA BMZ02
UT WOS:000273959900041
ER
PT B
AU Furstenberg, R
Kendziora, C
Papantonakis, M
Stepnowski, SV
Stepnowski, J
Nguyen, V
Rake, M
McGill, RA
AF Furstenberg, Robert
Kendziora, Chris
Papantonakis, Michael
Stepnowski, Stan V.
Stepnowski, Jennifer
Nguyen, Viet
Rake, Matthew
McGill, R. Andrew
GP IEEE
TI Stand-off Detection of Trace Explosives by Infrared Photo-thermal
Spectroscopy
SO 2009 IEEE CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY
LA English
DT Proceedings Paper
CT IEEE Conference on Technologies for Homeland Security
CY MAY 11-12, 2009
CL Waltham, MA
SP IEEE
ID EXCITATION
AB We have developed a technique for stand-off detection of trace explosives using infrared photo-thermal imaging. Compact infrared quantum cascade lasers tuned to strong absorption bands in the explosive traces illuminate a surface of interest while an infrared camera detects the small increase in thermal signal. We have demonstrated the technique at several meters of stand-off distance under laboratory conditions using TNT and RDX traces, while operating the lasers below the eye-safe limit (100 mW/cm(2)). Sensitivity to explosive traces as small as 1ng has been demonstrated, using a micro-bolometer array. We show the viability of this approach on a variety of surfaces which transmit, reflect or absorb the infrared laser light. By varying the incident wavelength slightly, we show selectivity between TNT and RDX. Using several laser wavelengths, we increase both sensitivity and selectivity while reducing the false alarm rate. We have developed a prototype system for outdoor testing at longer stand-offs.
C1 [Furstenberg, Robert; Kendziora, Chris; Papantonakis, Michael; Stepnowski, Stan V.; Nguyen, Viet; McGill, R. Andrew] USN, Res Lab, Mat & Sensors Branch, Code 6365, Washington, DC 20375 USA.
[Stepnowski, Jennifer; Rake, Matthew] Nova Res Inc, Alexandria, VA USA.
[Furstenberg, Robert] CNR, Washington, DC USA.
RP Furstenberg, R (reprint author), USN, Res Lab, Mat & Sensors Branch, Code 6365, Washington, DC 20375 USA.
EM kendzior@ccs.nrl.navy.mil
RI Papantonakis, Michael/G-3888-2012
FU ONR/NRL; OSD/RRTO [DRE-3826-777]
FX The authors gratefully acknowledge support from ONR/NRL. Part of this
work was supported under OSD/RRTO (DRE-3826-777). This research was
performed while R. Furstenberg held a National Research Council Research
Associateship Award at the U.S. Naval Research Laboratory. The authors
acknowledge useful collaborations with M. Razeghi, J. Meyer, R. Lindle,
E. Takeuchi, G. Hubler, and J.-Y. Fan.
NR 17
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4178-5
PY 2009
BP 457
EP +
PG 3
WC Computer Science, Information Systems; Computer Science, Theory &
Methods; Engineering, Electrical & Electronic; Physics, Applied
SC Computer Science; Engineering; Physics
GA BMZ02
UT WOS:000273959900068
ER
PT B
AU Chan, RR
Sudhoff, SD
Lee, Y
Zivi, EL
AF Chan, Ricky R.
Sudhoff, Scott D.
Lee, Yonggon
Zivi, Edwin L.
GP IEEE
TI A Linear Programming Approach to Shipboard Electrical System Modeling
SO 2009 IEEE ELECTRIC SHIP TECHNOLOGIES SYMPOSIUM
LA English
DT Proceedings Paper
CT IEEE Electric Ship Technologies Symposium (ESTS 2009)
CY APR 20-22, 2009
CL Baltimore, MD
SP IEEE
ID SHIP SURVIVABILITY; DESIGN
AB Operability and dependability metrics can be a valuable tool in early ship design by providing a quantitative analysis of the robustness of the ship's integrated engineering plant (IEP). However, the use of these metrics involves large numbers of time domain simulations of the IEP. The simulation of such a complex system, which includes electrical and thermal subsystems, can be problematic in terms of computational efficiency. In this paper, a simplified modeling approach based on the fundamental power limitations is set forth. The power flow problem is posed as a linear programming problem which is solved using a simplex method.
C1 [Chan, Ricky R.; Sudhoff, Scott D.] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA.
[Lee, Yonggon; Zivi, Edwin L.] US Naval Acad, Weap & Syst Engn, Annapolis, MD USA.
RP Chan, RR (reprint author), Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA.
FU Office of Naval Research through lectric Ship Research and Development
Consortium [N-00014-06-1-0314, N00014-08-0080]
FX This work is supported by the Office of Naval Research through Grant
N-00014-06-1-0314. It is also supported by the Office ONaval Research
through the Electric Ship Research and Development Consortium, Office of
Naval Research Grant N00014-08-0080.
NR 8
TC 2
Z9 2
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3438-1
PY 2009
BP 261
EP +
DI 10.1109/ESTS.2009.4906524
PG 2
WC Engineering, Marine; Engineering, Electrical & Electronic
SC Engineering
GA BLT19
UT WOS:000270974300038
ER
PT B
AU Diaz, B
Ortmeyer, TH
Pilvelait, B
Izenson, M
Chen, WB
Spivey, N
AF Diaz, Bart
Ortmeyer, Thomas H.
Pilvelait, Bruce
Izenson, Mike
Chen, Weibo
Spivey, Nathan
GP IEEE
TI System Study of Fault Current Limiter for Shipboard Power System
SO 2009 IEEE ELECTRIC SHIP TECHNOLOGIES SYMPOSIUM
LA English
DT Proceedings Paper
CT IEEE Electric Ship Technologies Symposium (ESTS 2009)
CY APR 20-22, 2009
CL Baltimore, MD
SP IEEE
DE Shipboard power system; fault current limiter; superconducting fault
current limiter
AB Fault current limiters are an attractive option for high fault current duty shipboard power systems. FCL's have the potential to improve safety and reliability, and limit the size and rating of protective equipment, and limit the extent of voltage sags and interruptions. This paper explores the system performance of a novel superconducting fault current limiter
C1 [Diaz, Bart; Ortmeyer, Thomas H.] Clarkson Univ, ECE Dept, Potsdam, NY 13699 USA.
[Pilvelait, Bruce; Izenson, Mike; Chen, Weibo] Creare Res & Dev Inc, Hanover, NH USA.
[Spivey, Nathan] US Naval Surface Warfare Ctr, Carderock Div, Philadelphia, PA USA.
RP Diaz, B (reprint author), Clarkson Univ, ECE Dept, Potsdam, NY 13699 USA.
EM ortmeyer@clarkson.edu
FU U.S. Naval Sea Systems Command
FX Bart Diaz and Thomas Ortmeyer (ortmeyer@clarkson.edu) are with the ECE
Dept, Clarkson Univeristy, Potsdam, NY 13699-5720. Bruce Pilvelait, Mike
Izenson, and Weibo Chen are with Creare, Inc., Hanover, New Hampshire.
Nathan Spivey is with the US Naval Surface Warfare Center, Carderock
Division. This work has been partially supported by the U.S. Naval Sea
Systems Command. Their financial support and technical guidance are
gratefully acknowledged.
NR 2
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3438-1
PY 2009
BP 376
EP +
DI 10.1109/ESTS.2009.4906539
PG 3
WC Engineering, Marine; Engineering, Electrical & Electronic
SC Engineering
GA BLT19
UT WOS:000270974300053
ER
PT B
AU Ciezki, JG
Salem, TE
AF Ciezki, John G.
Salem, Thomas E.
GP IEEE
TI Investigation of the Turn-Off Characteristics of a GTO Thyristor in an
Inductive-Based Pulse Forming Network
SO 2009 IEEE ELECTRIC SHIP TECHNOLOGIES SYMPOSIUM
LA English
DT Proceedings Paper
CT IEEE Electric Ship Technologies Symposium (ESTS 2009)
CY APR 20-22, 2009
CL Baltimore, MD
SP IEEE
ID DESIGN
AB This paper introduces a test circuit that is used to study the turn-off characteristics of a GTO thyristor when used as an opening switch. Specifically a safe-operating-area has been identified which demonstrates that a particular GTO device can successfully turn off as much as three times the maximum rated interruptible current. The text examines mechanisms for GTO turn-off failure and proposes follow-on research initiatives.
C1 [Ciezki, John G.; Salem, Thomas E.] USN Acad, Elect & Comp Eng Dept, Annapolis, MD 21402 USA.
RP Ciezki, JG (reprint author), USN Acad, Elect & Comp Eng Dept, Annapolis, MD 21402 USA.
EM ciezki@usna.edu; salem@usna.edu
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3438-1
PY 2009
BP 388
EP 392
DI 10.1109/ESTS.2009.4906541
PG 5
WC Engineering, Marine; Engineering, Electrical & Electronic
SC Engineering
GA BLT19
UT WOS:000270974300055
ER
PT B
AU Julian, AL
Cuzner, RM
AF Julian, Alexander L.
Cuzner, Robert M.
GP IEEE
TI Design, Modelling and Stability Analysis of an Integrated Shipboard DC
Power System
SO 2009 IEEE ELECTRIC SHIP TECHNOLOGIES SYMPOSIUM
LA English
DT Proceedings Paper
CT IEEE Electric Ship Technologies Symposium (ESTS 2009)
CY APR 20-22, 2009
CL Baltimore, MD
SP IEEE
AB This paper discusses the design, modelling and analysis of a DC power system for shipboard applications. A 24 pulse controlled rectifier converts the generator output to 1,000 VDC through a 12 phase transformer. This paper derives a model of the system and presents time domain simulations. Stability analysis is accomplished by applying the Nyquist Criterion.
C1 [Julian, Alexander L.] USN, Postgrad Sch, Monterey, CA USA.
[Cuzner, Robert M.] DRSP Power & Control Technol, Milwaukee, WI USA.
RP Julian, AL (reprint author), USN, Postgrad Sch, Monterey, CA USA.
EM ajulian@nps.edu
NR 12
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3438-1
PY 2009
BP 428
EP +
DI 10.1109/ESTS.2009.4906547
PG 2
WC Engineering, Marine; Engineering, Electrical & Electronic
SC Engineering
GA BLT19
UT WOS:000270974300061
ER
PT B
AU Julian, AL
Oriti, G
AF Julian, Alexander L.
Oriti, Giovanna
GP IEEE
TI FPGA Based Digital Implementation of Naturally Sampled Space Vector
Modulation
SO 2009 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Energy Conversion Congress and Exposition
CY SEP 20-24, 2009
CL San Jose, CA
SP IEEE
DE Field programmable gate arrays; Pulse width modulated inverters;
Sampling methods; Space vector modulation
ID CONVERTER; 3-PHASE
AB This paper demonstrates that oversampling improves the performance of digitally implemented space vector modulation. Using a field programmable gate array (FPGA) instead of a digital signal processor (DSP) or microcontroller allows the discrete algorithm to be executed in parallel instead of in series, increasing the algorithm speed considerably. As a result the reference signal can be sampled many times during any single switching period, converging on the performance of naturally sampled continuous signals. This paper shows experimental evidence that the phase delay of the output signal compared to the reference signal is significantly reduced by oversampling the reference signal. Additionally its gain with respect to the reference signal and its spectrum at low frequency are improved.
C1 [Julian, Alexander L.; Oriti, Giovanna] USN, Postgrad Sch, Monterey, CA 93943 USA.
RP Julian, AL (reprint author), USN, Postgrad Sch, 833 Dyer Rd, Monterey, CA 93943 USA.
EM ajulian@nps.edu; goriti@nps.edu
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2892-2
PY 2009
BP 1028
EP 1033
PG 6
WC Energy & Fuels; Engineering, Electrical & Electronic
SC Energy & Fuels; Engineering
GA BPQ32
UT WOS:000279630100154
ER
PT B
AU Julian, AL
Oriti, G
Blevins, S
AF Julian, Alexander L.
Oriti, Giovanna
Blevins, Stephen
GP IEEE
TI Operating Standby Redundant Controller to Improve Voltage Source
Inverter Reliability
SO 2009 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION, VOLS 1-6
LA English
DT Proceedings Paper
CT IEEE Energy Conversion Congress and Exposition
CY SEP 20-24, 2009
CL San Jose, CA
SP IEEE
DE Digital control system; Fault tolerance; Field programmable gate arrays;
Operating standby redundancy; Reliability; Voltage source inverters
AB This paper presents a digital control architecture that demonstrates operating standby redundancy for a voltage source inverter (VSI) controller. The reliability analysis shows the increased lifetime of the VSI using a standby redundant controller. The VSI control system is designed to switch from the primary to the secondary controller when a fault to the primary controller occurs. Simulated and experimental results validate that the redundant controller design switches between FPGA (field programmable gate array) based redundant controllers with no measurable disturbance to the output voltage.
C1 [Julian, Alexander L.; Oriti, Giovanna] USN, Postgrad Sch, 833 Dyer Rd, Monterey, CA 93943 USA.
[Blevins, Stephen] Southeast Reg Maintenance Ctr, Maypor, FL 32228 USA.
RP Julian, AL (reprint author), USN, Postgrad Sch, 833 Dyer Rd, Monterey, CA 93943 USA.
EM ajulian@nps.edu; goriti@nps.edu; stephen.t.blevins@navy.mil
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2892-2
PY 2009
BP 2619
EP +
PG 2
WC Energy & Fuels; Engineering, Electrical & Electronic
SC Energy & Fuels; Engineering
GA BPQ32
UT WOS:000279630101090
ER
PT S
AU Wagner, KT
Doroslovacki, MI
AF Wagner, Kevin T.
Doroslovacki, Milos I.
GP IEEE
TI GAIN ALLOCATION IN PROPORTIONATE-TYPE NLMS ALGORITHMS FOR FAST DECAY OF
OUTPUT ERROR AT ALL TIMES
SO 2009 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL
PROCESSING, VOLS 1- 8, PROCEEDINGS
SE International Conference on Acoustics Speech and Signal Processing
ICASSP
LA English
DT Proceedings Paper
CT IEEE International Conference on Acoustics, Speech and Signal Processing
CY APR 19-24, 2009
CL Taipei, TAIWAN
SP IEEE, IEEE Signal Proc Soc
DE Adaptive filters; least mean square methods; convergence of numerical
methods; sparse impulse response
ID STEP-SIZE NLMS
AB In this paper, we propose three new proportionate-type NLMS algorithms: the water filling algorithm, the feasible water filling algorithm, and the adaptive mu-law proportionate NLMS (MPNLMS) algorithm. The water filling algorithm attempts to choose the optimal gains at each time step. The optimal gains are found by minimizing the mean square error (MSE) at each time with respect to the gains, given the previous mean square weight deviations. While this algorithm offers superior convergence times, it is not feasible. The second algorithm is a feasible version of the water filling algorithm. The adaptive MPNLMS (AMPNLMS) algorithm is a modification of the MPNLMS algorithm. In the MPNLMS algorithm, the parameter mu of the mu-law compression is constant. In the AMPNLMS algorithm the parameter mu is allowed to vary with time. This modification allows the algorithm more flexibility when attempting to minimize the MSE. Compared with several feasible algorithms, the AMPNLMS algorithm has the fastest MSE decay for almost all times.
C1 [Wagner, Kevin T.] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
[Doroslovacki, Milos I.] George Washington Univ, Dept Elect & Comp Engn, Washington, DC 20052 USA.
RP Wagner, KT (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
EM kevin.wagner@nrl.navy.mil; doroslov@gwu.edu
NR 8
TC 5
Z9 5
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1520-6149
BN 978-1-4244-2353-8
J9 INT CONF ACOUST SPEE
PY 2009
BP 3117
EP +
DI 10.1109/ICASSP.2009.4960284
PG 2
WC Acoustics; Engineering, Electrical & Electronic
SC Acoustics; Engineering
GA BKQ01
UT WOS:000268919201319
ER
PT S
AU Hicks, J
Meehan, T
Kragh, F
AF Hicks, James
Meehan, Tim
Kragh, Frank
GP IEEE
TI Maximum a Posteriori Bit-Unstuffing
SO 2009 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-8
SE IEEE International Conference on Communications
LA English
DT Proceedings Paper
CT IEEE International Conference on Communications (ICC 2009)
CY JUN 14-18, 2009
CL Dresden, GERMANY
SP IEEE
DE MAP; bit-stuffing; HDLC
AB Bit-stuffing is the procedure of introducing an extra bit in the transmitted stream after a fixed number of consecutive ones or zeros. This paper demonstrates that, for conventional unstuffing, the BER experienced by individual bits within a stuffed frame dramatically and monotonically degrades with its positional-index. We also show that when knowledge of the number of stuffed bits is applied to maximum a posteriori (MAP) bit-unstuffing (MAPBU) (through a BCJR algorithm), this trend is significantly mitigated.
C1 [Hicks, James] Aerosp Corp, Chantilly, VA USA.
[Meehan, Tim] Vista Res Inc, Monterey, CA USA.
[Kragh, Frank] Naval Postgrad Sch, Monterey, CA USA.
RP Hicks, J (reprint author), Aerosp Corp, Chantilly, VA USA.
EM James.E.Hicks@aero.org; meehan@ieee.org; felcragh@nps.edu
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-3607
BN 978-1-4244-3434-3
J9 IEEE ICC
PY 2009
BP 3212
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BQG15
UT WOS:000280922201220
ER
PT S
AU Yakimenko, OA
Slegers, NJ
Bourakov, EA
Hewgley, CW
Bordetsky, AB
Jensen, RP
Robinson, AB
Malone, JR
Heidt, PE
AF Yakimenko, Oleg A.
Slegers, Nathan J.
Bourakov, Eugene A.
Hewgley, Charles W.
Bordetsky, Alex B.
Jensen, Red P.
Robinson, Andrew B.
Malone, Josh R.
Heidt, Phil E.
GP IEEE
TI Mobile System for Precise Aero Delivery with Global Reach Network
Capability
SO 2009 IEEE INTERNATIONAL CONFERENCE ON CONTROL AND AUTOMATION, VOLS 1-3
SE IEEE International Conference on Control and Automation ICCA
LA English
DT Proceedings Paper
CT IEEE International Conference on Control and Automation
CY DEC 09-11, 2009
CL Christchurch, NEW ZEALAND
SP IEEE
AB This paper discusses the current status of the development of the mobile aerial delivery system to be further employed in a variety of different applications. High accuracy of the developed system enables its use in precision troop resupply, precise sensors placement, urban warfare reconnaissance and other similar operations. This paper overviews the overall system architecture and components of the developed aero delivery system itself and then proceeds with describing the current status of integrating it with an advanced deployment platform, unmanned aerial system, to achieve mobility and autonomy of operations. The paper also discusses some other systems in development pursuing similar goals and reviews some novel applications that become possible with the developed aerial delivery system.
C1 [Yakimenko, Oleg A.] USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
[Slegers, Nathan J.] Univ Alabama, Mech & Aerosp Engn, Huntsville, AL 35899 USA.
[Bourakov, Eugene A.] NPS, Dept Informat Sci, Monterey, CA USA.
[Hewgley, Charles W.] NPS, Dept Elect Engn, Monterey, CA USA.
[Jensen, Red P.; Robinson, Andrew B.; Malone, Josh R.; Heidt, Phil E.] Arcturus UAV, Rohnert Pk, CA 94928 USA.
RP Yakimenko, OA (reprint author), USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
EM oayakime@nps.edu
NR 6
TC 2
Z9 2
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1948-3449
BN 978-1-4244-4706-0
J9 IEEE INT CONF CON AU
PY 2009
BP 1394
EP +
DI 10.1109/ICCA.2009.5410590
PG 2
WC Automation & Control Systems
SC Automation & Control Systems
GA BQB01
UT WOS:000280542300241
ER
PT S
AU Hunt, T
Krener, AJ
AF Hunt, Thomas
Krener, Arthur J.
GP IEEE
TI Principal Tangent Data Reduction
SO 2009 IEEE INTERNATIONAL CONFERENCE ON CONTROL AND AUTOMATION, VOLS 1-3
SE IEEE International Conference on Control and Automation ICCA
LA English
DT Proceedings Paper
CT IEEE International Conference on Control and Automation
CY DEC 09-11, 2009
CL Christchurch, NEW ZEALAND
SP IEEE
DE Nonlinear dimension reduction; manifold learning
ID NONLINEAR DIMENSIONALITY REDUCTION
AB There is a need to be able to find patterns in high dimensional data sets. Often these patterns are described as lower dimensional manifolds possibly of varying dimension that more or less fit the data. We present a new algorithm for doing this. It is a form of nonlinear principle component analysis.
C1 [Hunt, Thomas] Univ Calif Davis, Dept Math, Davis, CA 95616 USA.
[Krener, Arthur J.] Dept Appl Math, Naval Postgrad Sch, Monterey, CA 93943 USA.
RP Hunt, T (reprint author), Univ Calif Davis, Dept Math, Davis, CA 95616 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1948-3449
BN 978-1-4244-4706-0
J9 IEEE INT CONF CON AU
PY 2009
BP 1577
EP +
DI 10.1109/ICCA.2009.5410162
PG 3
WC Automation & Control Systems
SC Automation & Control Systems
GA BQB01
UT WOS:000280542300274
ER
PT S
AU Xargay, E
Dobrokhodov, V
Kitsios, I
Kaminer, I
Jones, KD
Hovakimyan, N
Cao, CY
Lizarraga, ML
Gregory, IM
AF Xargay, Enric
Dobrokhodov, Vladimir
Kitsios, Ioannis
Kaminer, Isaac
Jones, Kevin D.
Hovakimyan, Naira
Cao, Chengyu
Lizarraga, Mariano L.
Gregory, Irene M.
GP IEEE
TI Flight Validation of a Metrics Driven L-1 Adaptive Control in the
Presence of General Unmodeled Dynamics
SO 2009 IEEE INTERNATIONAL CONFERENCE ON CONTROL AND AUTOMATION, VOLS 1-3
SE IEEE International Conference on Control and Automation ICCA
LA English
DT Proceedings Paper
CT IEEE International Conference on Control and Automation
CY DEC 09-11, 2009
CL Christchurch, NEW ZEALAND
SP IEEE
ID ROBUSTNESS
AB The paper summarizes the results of an ongoing effort in the development and flight validation and verification of the metrics driven L-1 adaptive flight control system. In particular, the paper develops a unified framework for design, implementation, validation and verification of flight critical control systems including: (i) definition of experimental control validation technique that accounts for generalized plant uncertainties or unmodeled dynamics; (ii) tuning the developed L-1 adaptive controller to explicitly address performance metrics in the presence of modeling uncertainties under adverse flight conditions; (iii) development of a flight control system testing environment for implementation of the resulting algorithms onboard of a small unmanned aerial vehicle; and (iv) designing and conducting of a comprehensive flight test validation and verification program that demonstrates performance of the proposed adaptive control algorithm.
C1 [Xargay, Enric; Hovakimyan, Naira] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Dobrokhodov, Vladimir; Kitsios, Ioannis; Kaminer, Isaac; Jones, Kevin D.] Naval Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
[Cao, Chengyu] Univ Connecticut, Dept Comp Engn, Storrs, CT 06269 USA.
[Gregory, Irene M.] NASA Langley Res Ctr, Hampton, VA 23681 USA.
[Lizarraga, Mariano L.] Univ Calif Santa Cruz, Dept Comp Engn, Santa Cruz, CA 95064 USA.
RP Xargay, E (reprint author), Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
EM xargay@illinois.edu; vldobr@nps.edu; ikitsios@nps.edu; kaminer@nps.edu;
jones@nps.edu; nhovakim@illinois.edu; ccao@engr.uconn.edu;
malife@soe.ucsc.edu; irene.m.gregory@nasa.gov
RI Dobrokhodov, Vladimir/C-3443-2009
FU NASA [NNX08AB97A, NNX08AC81A, NNL08AA12I]; Hellenic Air Force Research
[KAE 0482/EF11-410]
FX This work was sponsored in part by NASA Grants NNX08AB97A, NNX08AC81A,
and NNL08AA12I, and Hellenic Air Force Research Grant (KAE
0482/EF11-410).
NR 20
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1948-3449
BN 978-1-4244-4706-0
J9 IEEE INT CONF CON AU
PY 2009
BP 2243
EP +
DI 10.1109/ICCA.2009.5410355
PG 2
WC Automation & Control Systems
SC Automation & Control Systems
GA BQB01
UT WOS:000280542300390
ER
PT S
AU Zimmerman, AT
Lynch, JP
Ferrese, FT
AF Zimmerman, Andrew T.
Lynch, Jerome P.
Ferrese, Frank T.
GP IEEE
TI Market-based computational task assignment within autonomous wireless
sensor networks
SO 2009 IEEE INTERNATIONAL CONFERENCE ON ELECTRO/INFORMATION TECHNOLOGY
SE International Conference on Electro Information Technology
LA English
DT Proceedings Paper
CT IEEE International Conference on Electro/Information Technology
CY JUN 07-09, 2009
CL Windsor, CANADA
SP IEEE
AB In recent years, improved wireless technologies have enabled the low-cost deployment of large numbers of sensors for a variety of applications across different engineering disciplines. Because of the computational resources (processing capability, storage capacity, etc.) distributed throughout these sensing networks, it is often possible to perform advanced data analysis tasks autonomously and in-network, eliminating the need for the post-processing of sensor data. With new parallel algorithms being developed for in-network computation, it has become necessary to create a framework in which the computational resources available throughout a wireless sensing network can be best utilized in the midst of competing computational requirements. In this study, a Pareto-optimal market-based method is developed in order to autonomously distribute various computational tasks with competing objectives and/or resource demands across available network resources. This method is experimentally validated on a network of wireless sensing prototypes.
C1 [Zimmerman, Andrew T.; Lynch, Jerome P.] Univ Michigan, Dept Civil & Environm Engn, Ann Arbor, MI 48109 USA.
[Ferrese, Frank T.] Naval Surface Warfare Ctr, Carderock Div, Philadelphia, PA USA.
RP Zimmerman, AT (reprint author), Univ Michigan, Dept Civil & Environm Engn, Ann Arbor, MI 48109 USA.
EM atzimmer@umich.edu; jerlynch@umich.edu
FU US Office of Naval Research
FX This work was supported by the US Office of Naval Research (Young
Investigator Award granted to Jerome P. Lynch). Additional support has
been provided to Andrew T. Zimmerman by the National Defense Science and
Engineering Graduate Fellowship Program.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2154-0357
BN 978-1-4244-3354-4
J9 INT CONF ELECTRO INF
PY 2009
BP 21
EP +
PG 2
WC Computer Science, Interdisciplinary Applications; Engineering,
Electrical & Electronic
SC Computer Science; Engineering
GA BNE68
UT WOS:000274280700005
ER
PT B
AU Arvay, RJ
Wijesekera, D
Michael, JB
AF Arvay, Randall J.
Wijesekera, Duminda
Michael, James Bret
GP IEEE
TI Using RuleML to Specify Cross-Domain Information Flow Control Policies
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING SOSE
2009
LA English
DT Proceedings Paper
CT IEEE International Conference on System of Systems Engineering
CY MAY 30-JUN 03, 2009
CL Albuquerque, NM
DE Cross-Domain; RuleML; security policy
AB We use RuleML to write declassification policies that secure information exchanges between different security levels of disparate access control models. Such flows enable sharing task-critical information that would otherwise not be shared without human intervention. Using RuleML as a security policy specification language allows us to preserve the safety property of information flow across multiple security levels. We also provide a motivating example of our approach to dealing with this property, taken from the Maritime Domain Awareness domain.
C1 [Arvay, Randall J.; Michael, James Bret] USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93940 USA.
[Wijesekera, Duminda] George Mason Univ, Dept Comp Sci, Fairfax, VA 22030 USA.
RP Arvay, RJ (reprint author), USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93940 USA.
EM rjarvay@nps.edu; dwijesek@gmu.edu; bmichael@nps.edu
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4766-4
PY 2009
BP 54
EP +
PG 2
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BUL10
UT WOS:000289709900009
ER
PT B
AU Lawless, WF
Sofge, DA
Venayagamoorthy, GK
Hillson, R
Abubucker, CP
AF Lawless, William F.
Sofge, Donald A.
Venayagamoorthy, G. K.
Hillson, Roger
Abubucker, C. P.
GP IEEE
TI A Physics of Interdependence for Human-Robot-Machine Organizations
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING SOSE
2009
LA English
DT Proceedings Paper
CT IEEE International Conference on System of Systems Engineering
CY MAY 30-JUN 03, 2009
CL Albuquerque, NM
DE Interdependence; conservation of information; organizational theory;
entanglement; agent-based model
AB We report progress on constructing a physics of interdependence for human-robot-machine organizations. Until now, organizational theory has failed. Similarly, while organizations of agent-based models produce interesting results, they are not predictive. We are integrating mathematics and measurement into a new model of interdependence in organizations based on the conservation of information that offers new insights and directions for research. However, it remains high-risk research.
C1 [Lawless, William F.; Abubucker, C. P.] Paine Coll, 1235 15th St, Augusta, GA 30901 USA.
[Sofge, Donald A.; Hillson, Roger] Naval Res Lab, Washington, DC USA.
[Venayagamoorthy, G. K.] Univ Missouri S&T, Real Time Power & Intelligent Syst Lab, Rolla, MO USA.
RP Lawless, WF (reprint author), Paine Coll, 1235 15th St, Augusta, GA 30901 USA.
EM lawlessw@mail.paine.edu; donald.sofge@nrl.navy.mil; gkumar@ieee.org;
roger.hillson@nrl.navy.mil; abubuckerc@mail.paine.edu
NR 45
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4766-4
PY 2009
BP 70
EP +
PG 3
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BUL10
UT WOS:000289709900012
ER
PT B
AU Drusinsky, D
AF Drusinsky, Doron
GP IEEE
TI Guarding the Guard: Using Meta Formal Specifications to Guard Assertions
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING SOSE
2009
LA English
DT Proceedings Paper
CT IEEE International Conference on System of Systems Engineering
CY MAY 30-JUN 03, 2009
CL Albuquerque, NM
AB The promise of formal verification of system-of-systems is in harnessing the power and accuracy of modern day computers to create trust-worthy systems. The success of formal verification techniques depends, to large degree, on the existence of a sound and complete collection of formally written requirements. To date, there is no known methodology for assuring that a collection of requirements, formal or otherwise, is complete. The use of meta-assertions suggested in this paper is a step in that direction. As their name suggests, meta-assertions are (second level) assertions. about (first-level) assertions. While first-level assertions are formal, executable statements about desired or undesired system behavior, second-level (meta)-assertions are formal and executable statements about desired or undesired behavior of level-one assertions. This paper examines an example of meta-assertions and discusses their use within a run-time verification environment.
C1 USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
RP Drusinsky, D (reprint author), USN, Postgrad Sch, Dept Comp Sci, 833 Dyer Rd, Monterey, CA 93943 USA.
EM ddrusins@nps.edu
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4766-4
PY 2009
BP 93
EP 97
PG 5
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BUL10
UT WOS:000289709900016
ER
PT B
AU Drusinsky, D
AF Drusinsky, Doron
GP IEEE
TI TLtoSQL: Rapid Post-Mortem Verification using Temporal Logic to SQL Code
Generation in the Eclipse PDE
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING SOSE
2009
LA English
DT Proceedings Paper
CT IEEE International Conference on System of Systems Engineering
CY MAY 30-JUN 03, 2009
CL Albuquerque, NM
ID TIME-SERIES CONSTRAINTS
AB This paper addresses the need for formal specification and high-level verification of requirements of complex reactive system of systems. It describes a technique and the associated TLtoSQL tool-set that consists of four plugins for the popular Eclipse environment: (i) A database tool that records JUnit tests in an JDBC compliant database, (ii) a graphical editor for Propositional Linear-Time Temporal Logic (PLTL) and Metric Temporal Logic (MTL) formal specifications, (iii) an automatic code generator that converts such PLTL and MTL specifications into Standard Query Language (SQL) code, (iv) a database engine that executes the generated SQL of (iii) on database tables of (i) thereby yielding a form of verification we call post-mortem verification.
C1 USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
RP Drusinsky, D (reprint author), USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
EM ddrusins@nps.edu
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4766-4
PY 2009
BP 98
EP 102
PG 5
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BUL10
UT WOS:000289709900017
ER
PT B
AU Cruickshank, KJ
Michael, JB
Shing, MT
AF Cruickshank, Kristian J.
Michael, James Bret
Shing, Man-Tak
GP IEEE
TI A Validation Metrics Framework for Safety-Critical Software-Intensive
Systems
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING SOSE
2009
LA English
DT Proceedings Paper
CT IEEE International Conference on System of Systems Engineering
CY MAY 30-JUN 03, 2009
CL Albuquerque, NM
DE Software Metrics; Safety Metrics; Validation Metrics; Metrics Framework;
Validation; Safety-Critical Software; Software Engineering; Goal
Question Metric; Goal Structuring Notation
AB As software complexity continues to increase in today's systems of systems, conveyance of stakeholder requirements, development to these requirements, and validation of these requirements has become exceedingly more difficult. Safety-critical software-intensive systems of systems require significant verification to ensure that they function as per requirements. Verification is only one portion of ensuring systems function correctly and is typically a well defined activity for software development. Validation is the other portion of ensuring that software is developed to the customer's satisfaction, however is not so well defined. The traditional validation model of matching system specification to stakeholder requirements and expectations does not cater for software safety, where stakeholder requirements and expectations are simply that of a "safe" system. We introduce a new model for validation of software safety requirements by proxy. Measurement of software safety is a relatively unexplored aspect of software engineering. Proactive validation of software safety requirements necessitates metrics acting as indicators of requirements validity. This paper presents the Validation Metrics Framework, which is based on a new model for validation of software safety requirements. We demonstrate the application of the framework with a representative safety-critical software-intensive system.
C1 [Cruickshank, Kristian J.] Tech Airworthiness Royal Australian AF RAAF Base, Syst Certificat & Integr Directorate Gen, Laverton, Vic 3027, Australia.
[Michael, James Bret; Shing, Man-Tak] Naval Postgrad Sch, Dept Comp Sci, Monterey, CA USA.
RP Cruickshank, KJ (reprint author), Tech Airworthiness Royal Australian AF RAAF Base, Syst Certificat & Integr Directorate Gen, Laverton, Vic 3027, Australia.
EM kcristian.cruickshank@defence.gov.au; bmichael@nps.edu; shing@nps.edu
FU National Aeronautics and Space Administration
FX The research reported in this article was funded in part by a grant from
the National Aeronautics and Space Administration.
NR 8
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4766-4
PY 2009
BP 109
EP +
PG 2
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BUL10
UT WOS:000289709900019
ER
PT B
AU Meacham, DJ
Michael, JB
Shing, MT
Voas, JM
AF Meacham, Desmond J.
Michael, James Bret
Shing, Man-Tak
Voas, Jeffrey M.
GP IEEE
TI Standards Interoperability: Applying Software Safety Assurance Standards
to the Evolution of Legacy Software
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING SOSE
2009
LA English
DT Proceedings Paper
CT IEEE International Conference on System of Systems Engineering
CY MAY 30-JUN 03, 2009
CL Albuquerque, NM
DE Reuse; Safety; Software Evolution; Standards; Certification; Abstract
Algebra
AB In this paper we treat software evolution from the perspective of standards interoperability. We address the issue of how to apply contemporary software safety assurance standards to legacy safety-critical systems, with the aim of re-certifying the legacy systems to the contemporary standards. We present a model to capture the relationships between pre- and post-modification software and standards, and a framework to provide guidance on how to achieve airworthiness certification for modified legacy software, whilst maximizing the use of software products from the previous development.
C1 [Meacham, Desmond J.] Tech Airworthiness Royal Australian AF RAAF Base, Syst Certificat & Integr Directorate Gen, Laverton, Vic 3027, Australia.
[Michael, James Bret; Shing, Man-Tak] US Navy, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
[Voas, Jeffrey M.] SAIC, 3811 North Fairfax Dr, suite 850, Arlington, VA 22203 USA.
RP Meacham, DJ (reprint author), Tech Airworthiness Royal Australian AF RAAF Base, Syst Certificat & Integr Directorate Gen, Laverton, Vic 3027, Australia.
EM desmond.meacham@defence.gov.au; bmichael@nps.edu; shing@nps.edu;
jeffrey.m.voas@saic.com
FU National Aeronautics and Space Administration
FX The research reported in this article was funded in part by a grant from
the National Aeronautics and Space Administration.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4766-4
PY 2009
BP 122
EP +
PG 2
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BUL10
UT WOS:000289709900021
ER
PT B
AU Michael, JB
Riehle, R
Sling, MT
AF Michael, James Bret
Riehle, Richard
Sling, Man-Tak
GP IEEE
TI The Verification and Validation of Software Architecture for Systems of
Systems
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING SOSE
2009
LA English
DT Proceedings Paper
CT IEEE International Conference on System of Systems Engineering
CY MAY 30-JUN 03, 2009
CL Albuquerque, NM
DE Software Architecture; Verification and Validation
ID FORMAL METHODS; FUTURE
AB In this paper we discuss the verification and validation of software architecture for system of systems. Software architecture plays a vital role in the systematic construction of large systems of systems; it defines the design space and provides a road map leading to the successful construction of system of systems that meet the functional and non-functional requirements. Moreover, a good architecture must allow the system of systems to evolve to meet new requirements due to change in mission. This paper introduces a mathematical model to tie the nonfunctional requirements of software systems to their architecture, and presents an approach to evaluate the quality of software architecture in light of meeting the requirements.
C1 [Michael, James Bret; Riehle, Richard; Sling, Man-Tak] USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
RP Michael, JB (reprint author), USN, Postgrad Sch, Dept Comp Sci, 1411 Cunningham Rd, Monterey, CA 93943 USA.
EM bmichael@nps.edu; rdriehle@nps.edu; shing@nps.edu
NR 15
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4766-4
PY 2009
BP 130
EP 135
PG 6
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BUL10
UT WOS:000289709900022
ER
PT B
AU Otani, TW
Michael, JB
Shing, MT
AF Otani, Thomas W.
Michael, James Bret
Shing, Man-Tak
GP IEEE
TI Software Reuse in the IV&V of System of Systems
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING SOSE
2009
LA English
DT Proceedings Paper
CT IEEE International Conference on System of Systems Engineering
CY MAY 30-JUN 03, 2009
CL Albuquerque, NM
DE Software reuse; System Reference Model; IV&V; System of systems
AB In this paper we address the need to increase the effectiveness and productivity of independent verification and validation (IV&V) of complex system-of-systems software via software reuse. We build upon our previous work on computer-aided IV&V techniques that advocate the use of a system reference model (SRM) to capture the IV&V team's understanding of the problem. An SRM is composed of use cases, Unified Modeling Language (UML) artifacts (e.g., activity diagrams, sequence diagrams, and class diagrams), and executable statechart-based assertions. Each statechart-based assertion is accompanied by a set of test scenarios, which is indispensable for a precise description of the required behaviors that satisfy the system goals. This paper describes a framework for reusing the SRM artifacts in the IV&V of system-of-systems software and presents a high-level architecture of a software reuse environment to support the framework
C1 [Otani, Thomas W.; Michael, James Bret; Shing, Man-Tak] USN, Postgrad Sch, Monterey, CA 93943 USA.
RP Otani, TW (reprint author), USN, Postgrad Sch, Monterey, CA 93943 USA.
EM twotani@nps.edu; bmichael@nps.edu; shing@nps.edu
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4766-4
PY 2009
BP 136
EP 140
PG 5
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BUL10
UT WOS:000289709900023
ER
PT B
AU Schumann, M
Michael, JB
AF Schumann, Michael
Michael, James Bret
GP IEEE
TI Statechart Based Formal Modeling of Workflow Processes
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING SOSE
2009
LA English
DT Proceedings Paper
CT IEEE International Conference on System of Systems Engineering
CY MAY 30-JUN 03, 2009
CL Albuquerque, NM
DE cross domain solutions; process engineering; formal methods; modeling
AB This paper describes a formal methods approach to process engineering. The approach involves statechart based formal process modeling as well as the use of embedded assertion statecharts to ensure the modeled process adheres to stated requirements. This approach can help the process engineer develop and maintain a process. The formal nature of our approach can also help the process engineer to reason about the process. We apply this approach to the Unified Cross Domain Management Office's Cross Domain Solution Workflow process. This is a key process in the development, implementation, and certification and accreditation of cross domain solutions.
C1 [Schumann, Michael; Michael, James Bret] USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
RP Schumann, M (reprint author), USN, Postgrad Sch, Dept Comp Sci, 1411 Cunningham Rd, Monterey, CA 93943 USA.
EM maschuma@nps.edu; bmichael@nps.edu
NR 20
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4766-4
PY 2009
BP 141
EP 145
PG 5
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BUL10
UT WOS:000289709900024
ER
PT B
AU Walker, TO
Tummala, M
McEachen, J
Michael, JB
AF Walker, T. Owens, III
Tummala, Murali
McEachen, John
Michael, J. Bret
GP IEEE
TI Medium Access for Hybrid, Large-scale Wireless Networks for Missile
Defense
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING SOSE
2009
LA English
DT Proceedings Paper
CT IEEE International Conference on System of Systems Engineering
CY MAY 30-JUN 03, 2009
CL Albuquerque, NM
DE Medium access; flow-specific; cross-layer; sensor networks; satellite
networks; system-of-systems
AB Several recent publications have sought to adopt a system-of-systems approach to view the ballistic missile defense system as a large-scale, wireless network. This approach implicitly relies on an effective medium access scheme that can accommodate the large propagation delays encountered in a satellite network. While existing satellite networks typically employ a form of time division multiple access, recent efforts have begun to explore contention-based medium access approaches. In this paper, we propose a flow-specific medium access solution designed to provide the improved delay performance of a contention-based medium access scheme at low contention levels and the throughput performance of a non-contention scheme as the network approaches saturation. Simulation results are provided using a version of the traffic-adaptive cooperative wireless sensor medium access control (CWS-MAC) protocol that has been modified to accommodate the large propagation delays.
C1 [Walker, T. Owens, III; Tummala, Murali; McEachen, John; Michael, J. Bret] USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
RP Walker, TO (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
EM towalker@nps.edu; mtummala@nps.edu; jmceachen@nps.edu; bmichael@nps.edu
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4766-4
PY 2009
BP 203
EP 207
PG 5
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BUL10
UT WOS:000289709900035
ER
PT S
AU Isaacs, JC
Goroshin, R
AF Isaacs, Jason C.
Goroshin, Ross
GP IEEE
TI Automated Cable Detection in Sonar Imagery
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN AND CYBERNETICS (SMC
2009), VOLS 1-9
SE IEEE International Conference on Systems Man and Cybernetics Conference
Proceedings
LA English
DT Proceedings Paper
CT IEEE International Conference on Systems, Man and Cybernetics
CY OCT 11-14, 2009
CL San Antonio, TX
SP IEEE
DE Edge detection; Hough transform; line detection; phase symmetry;
anisotropic diffusion
ID EDGE-DETECTION; DIFFUSION
AB The classical paradigm of line and curve detection in images, as prescribed by the Hough transform, breaks down in cluttered and noisy imagery. In this paper we present an "upgraded" and ultimately more robust approach to line detection in images. The classical approach to line detection in imagery is low-pass filtering, followed by edge detection, followed by the application of the Hough transform. Peaks in the Hough transform correspond to straight line segments in the image. In our approach we replace low pass filtering by anisotropic diffusion; we replace edge detection by phase analysis of frequency components; and finally, lines corresponding to peaks in the Hough transform are statistically analyzed to reveal the most prominent and likely line segments (especially if the line thickness is known a priori) in the context of sampling distributions. The technique is demonstrated on real and synthetic aperture sonar (SAS) imagery.
C1 [Isaacs, Jason C.; Goroshin, Ross] USN, Ctr Surface Warfare, Panama City, FL USA.
RP Isaacs, JC (reprint author), USN, Ctr Surface Warfare, Panama City, FL USA.
EM jason.c.isaacs1@navy.mil; rostislav.goroshin@navy.mil
NR 19
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1062-922X
BN 978-1-4244-2793-2
J9 IEEE SYS MAN CYBERN
PY 2009
BP 2745
EP 2750
DI 10.1109/ICSMC.2009.5346577
PG 6
WC Computer Science, Cybernetics; Computer Science, Information Systems
SC Computer Science
GA BPP02
UT WOS:000279574601169
ER
PT S
AU Bui, H
Han, X
Mandal, S
Pattipati, KR
Kleinman, DL
AF Bui, Huy
Han, Xu
Mandal, Suvasri
Pattipati, Krishna R.
Kleinman, David L.
GP IEEE
TI Optimization-based Decision Support Algorithms for a Team-in-the-Loop
Planning Experiment
SO 2009 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN AND CYBERNETICS (SMC
2009), VOLS 1-9
SE IEEE International Conference on Systems Man and Cybernetics Conference
Proceedings
LA English
DT Proceedings Paper
CT IEEE International Conference on Systems, Man and Cybernetics
CY OCT 11-14, 2009
CL San Antonio, TX
SP IEEE
DE mission planning; scheduling; decision aids; N-best assignments; mixed
integer programming; asset packages
AB Asset assignment and scheduling algorithms were developed and implemented to support a team-in-the-loop planning experiment conducted at the Naval Postgraduate School (NPS) in March 2009. The experiment examined planning and information flows among three cells in an abstracted and simplified Maritime Operations Center (MOC). This paper describes two optimization-based modules that focused on the Future Operations (FOPS) cell's planning activities. Module 1, a FOPS Planning Module, was a decision aid that presented the planners with N-best asset packages that would meet individual task requirements, while maximizing task execution accuracy. Module 2, a Scheduling Module, was an optimization-based scheduling algorithm that was used by experiment designers to set the conditions for the mission planning activity (e.g., asset types and numbers, task requirements and asset capabilities), and to assure that the tasks presented to the human planners would be achievable to a specified level of accuracy. A third module, termed Current Operations (COPS) Risk Analysis module, not discussed in detail here, was also implemented to assist COPS players on the consequences of redirecting assets from an ongoing task.
C1 [Bui, Huy; Han, Xu; Mandal, Suvasri; Pattipati, Krishna R.] Univ Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269 USA.
[Kleinman, David L.] US Navy, Postgrad Sch, Dept Informat Sci, Monterey, CA 93943 USA.
RP Bui, H (reprint author), Univ Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269 USA.
EM krishna@engr.uconn.edu; dlkleinm@nps.edu
FU Office of Naval [N00014-09-1-0062]
FX This work was supported by the Office of Naval Research under contract #
N00014-09-1-0062.
NR 11
TC 7
Z9 9
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1062-922X
BN 978-1-4244-2793-2
J9 IEEE SYS MAN CYBERN
PY 2009
BP 4684
EP +
DI 10.1109/ICSMC.2009.5346103
PG 2
WC Computer Science, Cybernetics; Computer Science, Information Systems
SC Computer Science
GA BPP02
UT WOS:000279574602201
ER
PT B
AU Jonker, BT
van 't Erve, OMJ
Kioseoglou, G
Hanbicki, AT
Li, CH
Holub, M
Awo-Affouda, C
Thompson, PE
AF Jonker, Berend T.
van 't Erve, Olaf M. J.
Kioseoglou, George
Hanbicki, Aubrey T.
Li, Connie H.
Holub, Michael
Awo-Affouda, Chaffra
Thompson, Phillip E.
GP IEEE
TI Silicon Spintronics: Spin Injection, Manipulation and Electrical
Detection
SO 2009 IEEE INTERNATIONAL ELECTRON DEVICES MEETING
SE International Electron Devices Meeting
LA English
DT Proceedings Paper
CT IEEE International Electron Devices Meeting (IEDM 2009)
CY DEC 07-09, 2009
CL Baltimore, MD
SP IEEE Electron Devices Soc
C1 [Jonker, Berend T.; Hanbicki, Aubrey T.; Li, Connie H.; Thompson, Phillip E.] Naval Res Lab, Washington, DC 20375 USA.
[van 't Erve, Olaf M. J.; Kioseoglou, George] George Washington Univ, Res Associates, Washington, DC 20052 USA.
[Holub, Michael; Awo-Affouda, Chaffra] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada.
RP Jonker, BT (reprint author), Naval Res Lab, Washington, DC 20375 USA.
EM jonker@nrl.navy.mil
FU ONR; NRL
FX This work was supported by ONR and programs at NRL.
NR 3
TC 0
Z9 0
U1 0
U2 9
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5639-0
J9 INT EL DEVICES MEET
PY 2009
BP 194
EP +
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BPM79
UT WOS:000279343900048
ER
PT S
AU Korwan, DR
Lucke, RL
McGlothlin, NR
Butcher, SD
Wood, DL
Bowles, JH
Corson, M
Snyder, WA
Davis, CO
Chen, DT
AF Korwan, D. R.
Lucke, R. L.
McGlothlin, N. R.
Butcher, S. D.
Wood, D. L.
Bowles, J. H.
Corson, M.
Snyder, W. A.
Davis, C. O.
Chen, D. T.
GP IEEE
TI Laboratory characterization of the Hyperspectral Imager for the Coastal
Ocean (HICO)
SO 2009 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS
1-5
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium
CY JUL 12-17, 2009
CL Cape Town, SOUTH AFRICA
SP IEEE
AB The laboratory characterization of the optical and radiometric properties of the Hyperspectral Imager for the Coastal Ocean (HICO) is presented. It is shown the as-built sensor meets or exceeds the design parameters necessary to meet the stringent requirements imposed by maritime hyperspectral imaging. The results confirm that in general, the design parameters have been satisfied and the measured system response and signal to noise ratio is shown to match the sensor model. The results are discussed
C1 [Korwan, D. R.; Lucke, R. L.; Bowles, J. H.; Corson, M.; Snyder, W. A.; Chen, D. T.] USN, Res Lab, Washington, DC 20375 USA.
RP Korwan, DR (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4244-3394-0
J9 INT GEOSCI REMOTE SE
PY 2009
BP 320
EP +
DI 10.1109/IGARSS.2009.5418003
PG 2
WC Geosciences, Multidisciplinary; Remote Sensing
SC Geology; Remote Sensing
GA BQI05
UT WOS:000281054100081
ER
PT S
AU Anguelova, MD
Gaiser, PW
Raizer, V
AF Anguelova, Magdalena D.
Gaiser, Peter W.
Raizer, Victor
GP IEEE
TI FOAM EMISSIVITY MODELS FOR MICROWAVE OBSERVATIONS OF OCEANS FROM SPACE
SO 2009 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS
1-5
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium
CY JUL 12-17, 2009
CL Cape Town, SOUTH AFRICA
SP IEEE
DE Sea foam; foam fraction; microwave radiometer; WindSat; whitecaps
AB Adequate accounting for the effect of the sea foam in forward models has the potential to improve the accuracy of satellite-based geophysical retrievals of environmental variables from passive radiometric measurements at frequencies from 1 to 100 GHz. Sea foam has a specific mechanical structure which gradually changes within the foam depth Due to this vertical stratification, the foam characteristics acquire a wide range of values To model the foam vertical stratification, it is necessary to use a vertical profile for the foam void fraction and to consider scattering between densely packed bubbles. In this study we evaluate two models which address the specifics of a vertically structured foam layer comprising densely packed bubbles in different ways.
C1 [Anguelova, Magdalena D.; Gaiser, Peter W.] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
[Raizer, Victor] LLC, Zel Technol, Fairfax, VA 22032 USA.
RP Anguelova, MD (reprint author), USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
EM magda@nrl.navy.mil; vraizer@aol.com
NR 10
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4244-3394-0
J9 INT GEOSCI REMOTE SE
PY 2009
BP 525
EP +
DI 10.1109/IGARSS.2009.5418061
PG 3
WC Geosciences, Multidisciplinary; Remote Sensing
SC Geology; Remote Sensing
GA BQI05
UT WOS:000281054100133
ER
PT S
AU Hwang, PA
Plant, WJ
AF Hwang, Paul A.
Plant, William J.
GP IEEE
TI SWELL INFLUENCE ON OCEAN SURFACE ROUGHNESS AND RADAR SCATTERING FROM THE
OCEAN SURFACE
SO 2009 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS
1-5
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium
CY JUL 12-17, 2009
CL Cape Town, SOUTH AFRICA
SP IEEE
DE Radar cross section; sea clutter; swell effect; ocean surface roughness
spectrum
ID MEAN-SQUARE SLOPE; BACKSCATTER; WAVES; GHZ
AB Swell effects of surface roughness spectral properties, including their wind speed dependence and modification of components characterizing Bragg resonance and surface tilting in radar application. are investigated Computations of radar cross sections are performed with four different spectral models with various degrees of swell consideration. Swell impact on the resulting radar return is illustrated.
C1 [Hwang, Paul A.] USN, Res Lab, Remote Sensing Div, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[Plant, William J.] Univ Washington, Appl Phys Lab, Seattle, WA USA.
RP Hwang, PA (reprint author), USN, Res Lab, Remote Sensing Div, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 17
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4244-3394-0
J9 INT GEOSCI REMOTE SE
PY 2009
BP 1339
EP +
DI 10.1109/IGARSS.2009.5418207
PG 2
WC Geosciences, Multidisciplinary; Remote Sensing
SC Geology; Remote Sensing
GA BQI05
UT WOS:000281054101010
ER
PT S
AU Vesecky, JF
Laws, KE
Paduan, JD
AF Vesecky, John F.
Laws, Kenneth E.
Paduan, Jeffery D.
GP IEEE
TI USING HF SURFACE WAVE RADAR AND THE SHIP AUTOMATIC IDENTIFICATION SYSTEM
(AIS) TO MONITOR COASTAL VESSELS
SO 2009 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS
1-5
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium
CY JUL 12-17, 2009
CL Cape Town, SOUTH AFRICA
SP IEEE
DE HF radar; Ship Monitoring; AIS
AB We compare the ship detection capabilities of the Automatic Identification System AIS (installed on some ships) and coastal, surface wave HF radars, showing how to use both systems together to enhance ship detection performance in coastal regions. Practical reasons to want better real-time awareness of the location, velocity and type of vessels along coasts include vessel safety, protection of the coastal environment and national security. Our model for the HF radar aspect uses an example radar with significant power and aperture, similar to the Pisces radar. The AIS model is for the high power (12.5 W) AIS unit and a significantly elevated receiver (approximate to 250 ft asl). The HF system show good capability to ranges of approximate to 150 km for small ships to 250 km for large ships. The A1S system shows excellent capability Out to a typical horizon of 50 km with irregular coverage beyond using ducted propagation to several hundred km and more. Use of both systems allows monitoring of both AIS and non-AIS equipped ships and enhances probability of detection for situations where both systems are functional.
C1 [Vesecky, John F.; Laws, Kenneth E.] Univ Calif Santa Cruz, Dept Elect Engn, 1156 High St, Santa Cruz, CA 95064 USA.
[Paduan, Jeffery D.] Univ Circle, Naval Postgrad Sch, Oceanog Dept, Monterey, CA 93943 USA.
RP Vesecky, JF (reprint author), Univ Calif Santa Cruz, Dept Elect Engn, 1156 High St, Santa Cruz, CA 95064 USA.
EM vesecky@soe.ucsc.edu; paduan@nps.navy.mil
NR 6
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4244-3394-0
J9 INT GEOSCI REMOTE SE
PY 2009
BP 2063
EP +
PG 2
WC Geosciences, Multidisciplinary; Remote Sensing
SC Geology; Remote Sensing
GA BQI05
UT WOS:000281054101194
ER
PT S
AU Lee, JS
Ainsworth, TL
Chen, KS
AF Lee, Jong-Sen
Ainsworth, Thomas L.
Chen, Kun-Shan
GP IEEE
TI THE EFFECT OF ORIENTATION ANGLE COMPENSATION ON POLARIMETRIC TARGET
DECOMPOSITIONS
SO 2009 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS
1-5
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium
CY JUL 12-17, 2009
CL Cape Town, SOUTH AFRICA
SP IEEE
DE Radar Polarimetry; Target decomposition; Polarimetric SAR
AB The orientation angle of scattering media affects the polarimetric radar signatures. This paper investigates the effect of orientation compensation on polarimetric target decompositions including Pauli decomposition, Freeman and Durden decomposition and Yamaguchi decomposition. The Cloude and Pottier decomposition is excluded, because entropy, anisotropy and alpha angle are rotational invariant. We will show that after the orientation compensation, the volume scattering power is consistently decreased, while the double bounce power has increased The surface scattering power is relatively unchanged, and the helicity power is rotational invariant. All these characteristics can be explained by the compensation effect on the nine elements of the coherency matrix This analysis reveals that, contrary to the general perception, the 4-component component decomposition by Yamaguichi et al. does not use complete information of the coherency matrix. Only six quantities are included - one more than the Freeman/Durden decomposition under the assumption of refection symmetry.
C1 [Lee, Jong-Sen; Ainsworth, Thomas L.] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
[Lee, Jong-Sen; Chen, Kun-Shan] Natl Cent Univ, Ctr Space & Remote Sensing Res, Chungli 32054, Taiwan.
RP Lee, JS (reprint author), USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
NR 5
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4244-3394-0
J9 INT GEOSCI REMOTE SE
PY 2009
BP 3229
EP +
DI 10.1109/IGARSS.2009.5417510
PG 2
WC Geosciences, Multidisciplinary; Remote Sensing
SC Geology; Remote Sensing
GA BQI05
UT WOS:000281054102083
ER
PT B
AU Casey, MC
Bhuva, BL
Nation, SA
Amusan, OA
Loveless, TD
Massengill, LW
McMorrow, D
Melinger, JS
AF Casey, Megan C.
Bhuva, Bharat L.
Nation, Sarah A.
Amusan, Oluwole A.
Loveless, T. Daniel
Massengill, Lloyd W.
McMorrow, Dale
Melinger, Joseph S.
GP IEEE
TI Single-Event Effects on Ultra-Low Power CMOS Circuits
SO 2009 IEEE INTERNATIONAL RELIABILITY PHYSICS SYMPOSIUM, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 47th Annual IEEE International Reliability Physics Symposium
CY APR 26-30, 2009
CL Montreal, CANADA
SP IEEE
DE subthreshold; combinational logic; single-event effects; soft error
rate; ultra-low power CMOS
ID GENERATION; ABSORPTION
AB Operating circuits in the subthreshold region is a simple method to lower total power consumption. The lower supply voltages decrease the electric fields present in the devices (resulting in lower charge collection), but increase the time required to remove the charge. These two competing mechanisms are characterized through two-photon absorption experiments for single-events to show that single-event vulnerability does not show a linear relationshiop with power supply voltage, as would be expected, in the subthreshold region. Single-event characterization is carried out using higher harmonic oscillation in ring oscillators with large numbers of stages over a wide range of supply voltages.
C1 [Casey, Megan C.; Bhuva, Bharat L.; Nation, Sarah A.; Amusan, Oluwole A.; Loveless, T. Daniel; Massengill, Lloyd W.] Vanderbilt Univ, Dept Elect Engn & Comp Sci, Nashville, TN 37203 USA.
[McMorrow, Dale; Melinger, Joseph S.] Naval Res Lab, Washington, DC 20375 USA.
RP Casey, MC (reprint author), Vanderbilt Univ, Dept Elect Engn & Comp Sci, Nashville, TN 37203 USA.
EM megan.c.casey@vanderbilt.edu
FU Defense Threat Reduction Agency Rad-Hard Microelectronics Program;
Defense Advanced Research Projects Agency Radiation Hardening by Design
Program through Boeing
FX This work was sponsored in part by the Defense Threat Reduction Agency
Rad-Hard Microelectronics Program and the Defense Advanced Research
Projects Agency Radiation Hardening by Design Program through Boeing.
NR 13
TC 7
Z9 7
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2888-5
PY 2009
BP 194
EP +
DI 10.1109/IRPS.2009.5173250
PG 2
WC Computer Science, Theory & Methods; Engineering, Electrical &
Electronic; Physics, Multidisciplinary
SC Computer Science; Engineering; Physics
GA BMF10
UT WOS:000272068100032
ER
PT B
AU Wright, EL
Nguyen, KT
Pasour, JA
Cooke, SJ
Levush, B
Petillo, JJ
Chernyavskiy, IA
DeFord, JF
Held, BL
Cusick, M
AF Wright, Edward L.
Nguyen, Khanh T.
Pasour, John A.
Cooke, Simon J.
Levush, Baruch
Petillo, John J.
Chernyavskiy, Igor A.
DeFord, John F.
Held, Ben L.
Cusick, Michael
GP IEEE
TI Modeling and Design of High-Power Single-Beam and Multiple-Beam
Inductive Output Tubes
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE Inductive Output Tube; PIC; Multiple-Beam
AB The Inductive Output Tube (IOT) is today the device-of-choice for terrestrial UHF broadcast applications due to the IOT's high efficiency with linearity and compact size. The accelerator community is also making the transition to IOT technology for a number of high-power UHF and L-band applications as a result of these benefits. Although the IOT appears to be quite simple, the actual operation of the device is quite complex and difficult to analyze quantitatively. Consequently, we are investigating the physics of the beam-wave interaction of the IOT with the goal of achieving significantly higher power operation. The time-domain electrostatic PIC code MICHELLE, in conjunction with the Analyst suite of electromagnetic codes, were used to model the cathode-grid-anode structure that comprise the input cavity. Our investigation has led to the discovery of a mechanism responsible for intra-bunch charge formation. Time-domain PIC results of this effect will be shown. We will also present simulation results of the large-signal beam wave interaction in the output cavity using the code TESLA. Examples of single beam and multiple-beam (MB) IOT designs will also be shown.
C1 [Wright, Edward L.; Nguyen, Khanh T.] Beam Wave Res Inc, Bethesda, MD 20814 USA.
[Pasour, John A.; Cooke, Simon J.; Levush, Baruch] Naval Res Lab, Washington, DC 20375 USA.
[Petillo, John J.; Chernyavskiy, Igor A.] SAIC, Billerica, MA 01821 USA.
[DeFord, John F.; Held, Ben L.] Simulat Technol & Appl Res, Mequon, WI USA.
[Cusick, Michael] CPI Inc, Palo Alto, CA 94304 USA.
[Pasour, John A.; Cooke, Simon J.; Levush, Baruch] Vaccum Elect Branch, Washington, DC 20375 USA.
RP Wright, EL (reprint author), Beam Wave Res Inc, Bethesda, MD 20814 USA.
FU U.S. Office of Naval Research
FX This work is supported by the U.S. Office of Naval Research.
NR 3
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 117
EP +
DI 10.1109/IVELEC.2009.5193386
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800036
ER
PT B
AU Chernyavskiy, IA
Vlasov, AN
Cooke, SJ
Abe, DK
Levush, B
Antonsen, TM
Pershing, DE
Wright, EL
Nguyen, KT
AF Chernyavskiy, Igor A.
Vlasov, Alexander N.
Cooke, Simon J.
Abe, David K.
Levush, Baruch
Antonsen, Thomas M., Jr.
Pershing, Dean E.
Wright, Edward L.
Nguyen, Khanh T.
GP IEEE
TI TESLA Modeling of the Linear-Beam Amplifiers
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE large-signal code; single-beam and multiple-beams devices; klystrons;
inductive output tubes
ID SIMULATION
AB Recent advances in the development of the large-signal code TESLA are discussed in details from the point of view of the modeling of a wide range of linear-beam amplifiers. The results of TESLA modeling are illustrated using examples of a few experimental devices, including recently built and tested multiple-beam klystrons.
C1 [Chernyavskiy, Igor A.] Sci Applicat Int Corp, 1710 SAIC Dr, Mclean, VA 22102 USA.
[Antonsen, Thomas M., Jr.] Univ Maryland, College Pk, MD 20742 USA.
[Vlasov, Alexander N.; Cooke, Simon J.; Abe, David K.; Levush, Baruch] Naval Res Lab, Washington, DC 20375 USA.
[Pershing, Dean E.; Wright, Edward L.; Nguyen, Khanh T.] Beam Wave Res Inc, Bethesda, MD 20905 USA.
RP Chernyavskiy, IA (reprint author), Sci Applicat Int Corp, 1710 SAIC Dr, Mclean, VA 22102 USA.
EM igor.a.chernyavskiy@saic.com
RI Abe, David/D-7546-2013; Antonsen, Thomas/D-8791-2017
OI Antonsen, Thomas/0000-0002-2362-2430
NR 5
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 121
EP +
DI 10.1109/IVELEC.2009.5193388
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800038
ER
PT B
AU Vlasov, AN
Cooke, SJ
Levush, B
Antonsen, TM
Chernyavskiy, IA
Chernin, DP
AF Vlasov, Alexander N.
Cooke, Simon J.
Levush, Baruch
Antonsen, Thomas M., Jr.
Chernyavskiy, Igor A.
Chernin, David P.
GP IEEE
TI Modeling of Coupled Cavity TWT with TESLA
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE coupled cavity TWT; large-signal code; Curnow circuit model; drive
induced instability
ID TUBES
AB Recent development of the large-signal 2.5D code TESLA allows for simulations of coupled cavity TWT is presented. The results of TESLA modeling are compared with Christine-CC code simulations.
C1 [Vlasov, Alexander N.; Cooke, Simon J.; Levush, Baruch] USN, Res Lab, Washington, DC 20375 USA.
[Chernyavskiy, Igor A.; Chernin, David P.] Sci Applicat Int Corp, Mclean, VA 22102 USA.
[Antonsen, Thomas M., Jr.] Univ Maryland, College Pk, MD 20742 USA.
RP Vlasov, AN (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM vlasov@iccs.nrl.navy.mil
RI Antonsen, Thomas/D-8791-2017
OI Antonsen, Thomas/0000-0002-2362-2430
FU US Office of Naval Research
FX This work was supported by the US Office of Naval Research.
NR 5
TC 2
Z9 2
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 155
EP +
DI 10.1109/IVELEC.2009.5193483
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800055
ER
PT B
AU Mitsdarffer, B
Correll, R
AF Mitsdarffer, Bryan
Correll, Rick
GP IEEE
TI TWT Life Cycle Cost Reduction Program
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE TWT; Electron Gun; Cathode; Life
AB The life cycle cost of microwave tubes is a major component of the total operational cost for large radar systems. Since system requirements are almost impossible to change, cost can really only be reduced by engineering improvements to high-value components (such as microwave tubes) which result in improved life expectancy. This paper presents one such example in which modern design and analysis methods were applied to an existing TWT design. The approach was to increase the effective area of the cathode, thereby decreasing the cathode loading and extending life. Modeling and simulation codes were used throughout the process to ensure that performance would not be compromised.
C1 [Mitsdarffer, Bryan; Correll, Rick] USN, Radar Technol Div, Crane Div, Ctr Surface Warfare, Crane, IN 47522 USA.
RP Mitsdarffer, B (reprint author), USN, Radar Technol Div, Crane Div, Ctr Surface Warfare, Crane, IN 47522 USA.
EM bryan.mitsdarffer@navy.mil
NR 1
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 223
EP 223
DI 10.1109/IVELEC.2009.5193494
PG 1
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800088
ER
PT B
AU Larsen, PB
Abe, DK
Cooke, SJ
Levush, B
Antonsen, TM
Myers, RE
AF Larsen, Paul B.
Abe, David K.
Cooke, Simon J.
Levush, Baruch
Antonsen, Thomas M., Jr.
Myers, Robert E.
GP IEEE
TI Experimental Characterization of a Ka-Band Sheet-Beam Coupled-Cavity
Slow-Wave Structure
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE Sheet-beam; coupled-cavity; slow-wave structure; dispersion;
measurement; transmission; resonance; perturbation
AB We present experimental results and comparison with 3D electromagnetic simulations that characterize the dispersion of a Ka-band sheet-beam coupled-cavity slow-wave structure. Methods of characterization transmission, resonance, and perturbation.
C1 [Larsen, Paul B.; Abe, David K.; Cooke, Simon J.; Levush, Baruch] USN, Res Lab, Code 6840,4555 Overlook Ave SW, Washington, DC 20375 USA.
[Antonsen, Thomas M., Jr.] Univ Maryland, College Pk, MD 24702 USA.
[Myers, Robert E.] Beam Wave Res Inc, Bethesda, MD 20814 USA.
RP Larsen, PB (reprint author), USN, Res Lab, Code 6840,4555 Overlook Ave SW, Washington, DC 20375 USA.
RI Abe, David/D-7546-2013; Antonsen, Thomas/D-8791-2017
OI Antonsen, Thomas/0000-0002-2362-2430
FU U.S. Office of Naval Research
FX This work was supported by the U.S. Office of Naval Research. We would
also like to thank Rasheda Begum and Jim Legarra (retired) of CPI Inc.
for assistance in establishing our experimental setup.
NR 1
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 224
EP +
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800089
ER
PT B
AU Nguyen, KT
Pasour, J
Wright, EL
Pershing, DE
Levush, B
AF Nguyen, Khanh T.
Pasour, John
Wright, Edward L.
Pershing, Dean E.
Levush, Baruch
GP IEEE
TI Design of a G-band Sheet-beam Extended-Interaction Klystron
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE Sheet beam; G-band; electron gun; Extended-Interaction Klystrons; EIK;
amplifiers
AB The preliminary design of a four-cavity G-band sheet-beam Extended-Interaction Klystron (EIK) Circuit is presented. The circuit design has been performed with the self-consistent particle-in-cell (PIC) code MAGIC-3D. All cavities operate in the 2-pi mode. The circuit is powered by a 520 mA, 16.5 kV sheet-electron beam. Output power of 453 W is achieved with an input power of 25 mW, corresponding to an electronic gain of 41.6 dB in a circuit length of approximately of 1.2 cm.
C1 [Nguyen, Khanh T.; Wright, Edward L.; Pershing, Dean E.] Beam Wave Res Inc, Bethesda, MD 20814 USA.
[Pasour, John; Levush, Baruch] Naval Res Lab, Vacuum Elect Branch, Washington, DC 20375 USA.
RP Nguyen, KT (reprint author), Beam Wave Res Inc, Bethesda, MD 20814 USA.
FU Office of Naval Research
FX This work was supported the Office of Naval Research.
NR 4
TC 16
Z9 18
U1 0
U2 9
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 298
EP +
DI 10.1109/IVELEC.2009.5193420
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800126
ER
PT B
AU Pasour, J
Nguyen, K
Antonsen, T
Larsen, P
Levush, B
AF Pasour, John
Nguyen, Khanh
Antonsen, Thomas
Larsen, Paul
Levush, Baruch
GP IEEE
TI Solenoidal Transport of Low-Voltage Sheet Beams for Millimeter Wave
Amplifiers
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE Sheet beam; electron gun; millimeter wave; vacuum electronic; amplifier;
high perveance
AB The stable transport of high-perveance, low-voltage sheet electron beams is a key requirement for the successful development of compact, high-power sheet beam amplifiers. Here, we examine the transport of such beams in a solenoidal magnetic field and compare and contrast this transport with that produced by a periodic permanent magnet array. It is shown that a solenoid can stably transport a sheet beam of significantly higher current density than a periodic array and that diocotron effects, which are usually cited as a reason for not considering solenoidal transport, can be effectively suppressed over propagation distances needed for MMW amplifiers. Based on these considerations, we have designed a sheet beam gun and permanent magnet solenoid, which are now being fabricated as a beam stick for a W-band extended interaction klystron.
C1 [Pasour, John; Larsen, Paul; Levush, Baruch] USN, Vacuum Elect Branch, Res Lab, Washington, DC 20375 USA.
[Nguyen, Khanh] Beam Wave Res, Bethesda, MD 20814 USA.
[Antonsen, Thomas] Univ Maryland, College Pk, MD 20742 USA.
RP Pasour, J (reprint author), USN, Vacuum Elect Branch, Res Lab, Washington, DC 20375 USA.
EM john.pasour@nrl.navy.mil
FU Office of Naval Research
FX This work is supported by the Office of Naval Research
NR 5
TC 0
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 300
EP +
DI 10.1109/IVELEC.2009.5193421
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800127
ER
PT B
AU Abe, DK
Pershing, DE
Wright, EL
Nguyen, KT
Wood, FN
Myers, RE
Eisen, EL
Levush, B
AF Abe, David K.
Pershing, Dean E.
Wright, Edward L.
Nguyen, Khanh T.
Wood, Franklin N.
Myers, Robert E.
Eisen, Edward L.
Levush, Baruch
GP IEEE
TI Experimental Progress on the Development of a Multiple-Beam Klystron
with 13% Bandwidth
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE Multiple-beam klystron; broad bandwidth
ID S-BAND; HIGH-POWER; DESIGN; GUN
AB We present recent progress on the development of a multiple-beam klystron (MBK) designed to operate in S-band with a 1-dB bandwidth of 13%. The amplifier is powered by an 18-beam electron gun operating at a voltage of 42 kV and a total current of 41.6 A. Measured gun voltage-current characteristics will be compared with the design predictions made by the 3D particle code, MICHELLE. Experimental measurements of the frequency and Q's of individual cavities comprising the interaction circuit will be compared with 3D electromagnetic simulations. Finally, as available, we will also report on hot test measurements of the rf performance of the MBK.
C1 [Abe, David K.; Wood, Franklin N.; Levush, Baruch] USN, Res Lab, Vacuum Elect Branch, Code 6841,4555 Overlook Ave SW, Washington, DC 20375 USA.
[Pershing, Dean E.; Wright, Edward L.; Nguyen, Khanh T.] Beam Wave Res Inc, Bethesda, MD 18654 USA.
[Eisen, Edward L.] Commun & Power Ind, Palo Alto, CA 94301 USA.
RP Abe, DK (reprint author), USN, Res Lab, Vacuum Elect Branch, Code 6841,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM david.abe@nrl.navy.mil
RI Abe, David/D-7546-2013
FU U.S. Office of Naval Research
FX This work was supported by the U.S. Office of Naval Research.
NR 6
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 337
EP +
DI 10.1109/IVELEC.2009.5193424
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800141
ER
PT B
AU Mitsdarffer, KB
Crespo, W
Hoover, L
AF Mitsdarffer, K. Bryan
Crespo, William
Hoover, Lowell
GP IEEE
TI Automated Noise Measurement System for Radar and EW Transmitter
Components
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE Microwave; Radar; Tube; Component; Measurement; Noise; Jitter
AB The development of a 2-18 GHz instrument for radar and EW transmitter test and measurement is reported. The Transmitter Component Analyzer was developed by NSWC Crane to measure critical performance parameters of the AN/SPY-1 radar's components. Typical measurements include clutter attenuation, clutter improvement factor, intrapulse noise, Moving Target Indicator residues, random pulse jitter, systematic pulse jitter, phase noise, and amplitude noise.
C1 [Mitsdarffer, K. Bryan] USN, Ctr Surface Warfare, Radar Technol Div, Crane Div, Crane, IN 47522 USA.
[Crespo, William] Technol Serv Corp, Bloomington, IN 47403 USA.
[Hoover, Lowell] Polyphase Microwave, Bloomington, IN 47403 USA.
RP Mitsdarffer, KB (reprint author), USN, Ctr Surface Warfare, Radar Technol Div, Crane Div, Crane, IN 47522 USA.
EM bryan.mitsdarffer@navy.mil
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 429
EP +
DI 10.1109/IVELEC.2009.5193554
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800186
ER
PT B
AU Pchelnikov, YN
Larsen, P
AF Pchelnikov, Yuriy N.
Larsen, Paul
GP IEEE
TI Measurement of the Coupling Impedance in Slow-Wave Structures Using a
Longitudinally Conducting Plate
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE coupling impedance; sheet electron beam; slow-wave structure
AB A method of measuring the coupling impedance in slow-wave structures (SWS) is presented and analyzed in this paper. This method is based on comparisons of the resonant frequencies of a SWS with and without the longitudinally conducting probe. Using these frequencies, we derive an expression for the wave impedance of a sheet electron beam in a planar SWS with a rectangular cross section.
C1 [Pchelnikov, Yuriy N.] SAIC, 104 Drexelbrook Ct, Cary, NC 27519 USA.
[Larsen, Paul] US Naval Res Lab, Washington, DC USA.
RP Pchelnikov, YN (reprint author), SAIC, 104 Drexelbrook Ct, Cary, NC 27519 USA.
EM yupchel@gmail.com
NR 3
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 461
EP +
DI 10.1109/IVELEC.2009.5193570
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800202
ER
PT B
AU Petillo, J
Panagos, D
Ovtchinnikov, S
Held, B
DeFord, J
Nelson, E
Nguyen, K
Wright, E
Jensen, K
Levush, B
AF Petillo, John
Panagos, Dimitrios
Ovtchinnikov, Serguei
Held, Ben
DeFord, John
Nelson, Eric
Nguyen, Khanh
Wright, Ed
Jensen, Kevin
Levush, Baruch
GP IEEE
TI Applications and Current Status of the Finite-Element MICHELLE Gun &
Collector Simulation Code
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
ID ELECTRON-GUN
AB The MICHELLE code is a Finite-Element Electrostatic Particle in Cell code for application to 2D and 3D particle beam formation, transport, and collection. Its primary development focus has been for DC electron guns and depressed collectors, however, it has other applications such as RF electron guns, ion thrusters, photocathodes, etc. Its ability to manage large mesh sizes and large particle counts in complex geometries requiring the resolution of disparate spatial scales in 2D and 3D on desktop computers has allowed it to be applied to devices that could not have been readily modeled in recent years. This presentation gives an overview of recent applications, capabilities, and the current status of MICHELLE. In particular, application to time-dependent problems and optimization will be illustrated
C1 [Petillo, John; Panagos, Dimitrios; Ovtchinnikov, Serguei] Sci Applicat Int Corp, 700 Technol Pk Dr, Billerica, MA 01821 USA.
[Held, Ben; DeFord, John] Simulat Technol & Appl Res Inc, Washington, DC 53092 USA.
[Nelson, Eric] Los Alamos Natl Lab, Los Alamos, NM USA.
[Nguyen, Khanh; Wright, Ed] Beam Wave Res Inc, Bethesda, MD 20814 USA.
[Jensen, Kevin; Levush, Baruch] Naval Res Lab, Washington, DC 20375 USA.
RP Petillo, J (reprint author), Sci Applicat Int Corp, 700 Technol Pk Dr, Billerica, MA 01821 USA.
EM petilloj@saic.com
OI Jensen, Kevin/0000-0001-8644-1680
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 463
EP +
DI 10.1109/IVELEC.2009.5193571
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800203
ER
PT B
AU Chernin, D
Antonsen, TM
McDonald, J
Levush, B
Begum, R
Legarra, J
AF Chernin, D.
Antonsen, T. M., Jr.
McDonald, J.
Levush, B.
Begum, R.
Legarra, J.
GP IEEE
TI Frequency Domain Simulation of Drive Induced Oscillation in a Coupled
Cavity TWT
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE Drive-induced oscillation; coupled-cavity TWT; computer simulation
AB We present an approach to and an example of the simulation of drive induced oscillation (DIO) in a coupled cavity TWT based on a large signal, multi-frequency steady state formulation of the governing equations. A simulation code based on such a formulation can provide results in less time than a time domain approach, since it avoids having to integrate the governing equations through the initial transient startup of the amplifier. Two approaches to inhibiting DIO, namely (1) the introduction of a circuit velocity step in the output section, and (2) the use of lossy material in selected cavities in the output section are demonstrated using the large signal frequency domain code CHRISTINE-CC.
C1 [Chernin, D.; Antonsen, T. M., Jr.; McDonald, J.; Levush, B.] Naval Res Lab, Washington, DC 20375 USA.
[Begum, R.; Legarra, J.] CPI, Palo Alto, CA 94304 USA.
RP Chernin, D (reprint author), Naval Res Lab, Washington, DC 20375 USA.
EM chernind@saic.com
RI Antonsen, Thomas/D-8791-2017
OI Antonsen, Thomas/0000-0002-2362-2430
NR 4
TC 2
Z9 2
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 503
EP +
DI 10.1109/IVELEC.2009.5193440
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800223
ER
PT B
AU Nelson, EM
Petillo, JJ
Levush, B
AF Nelson, Eric M.
Petillo, John J.
Levush, Baruch
GP IEEE
TI Improved Symmetries in the Finite-Element Gun Code MICHELLE
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE finite-element gun code; MICHELLE; symmetry planes; periodicities
AB We have improved the finite-element gun code MICHELLE's handling of symmetry planes and periodicities. A general-purpose vertex vector field symmetrization algorithm ensures that gun simulations that track particles with smoothed electric fields are consistent between full and symmetry-reduced models. The smoothed fields in a symmetry-reduced model are now more accurate on symmetry planes and periodic boundaries, and likewise on the axis of axisymmetric models. We describe the algorithm and present simulations that demonstrate these improvements.
C1 [Nelson, Eric M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Petillo, John J.] SAIC, Billerica, MA USA.
[Levush, Baruch] Naval Res Lab, Washington, DC USA.
RP Nelson, EM (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
OI Nelson, Eric/0000-0003-1446-6453
NR 1
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 507
EP +
DI 10.1109/IVELEC.2009.5193442
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800225
ER
PT B
AU Yater, JE
Shaw, JL
Jensen, KL
Butler, JE
Pate, BB
Feygelson, T
AF Yater, J. E.
Shaw, J. L.
Jensen, K. L.
Butler, J. E.
Pate, B. B.
Feygelson, T.
GP IEEE
TI Diamond Current Amplifier for Spatially-Distributed Beam Generation
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE secondary emission; diamond; current amplifier; negative electron
affinity; sheet electron beam
AB A diamond current amplifier is being developed to provide high-current-density electron beams needed for sheet beam generation. Thin single-crystal CVD diamond films are being grown and optimized with respect to crystal purity, film thickness, and surface quality Electron emission measurements taken from fabricated amplifiers will be used to characterize and optimize the emission gain, emitted electron energy spread, and spatial uniformity of the emitted beam.
C1 [Yater, J. E.; Shaw, J. L.; Jensen, K. L.] Naval Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
[Butler, J. E.; Pate, B. B.] Naval Res Lab, Div Chem, Washington, DC 20375 USA.
[Feygelson, T.] SAIC Inc, Washington, DC 20003 USA.
RP Yater, JE (reprint author), Naval Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
EM joan.yater@nrl.navy.mil
RI Butler, James/B-7965-2008; Jensen, Kevin/I-1269-2015; Pate,
Bradford/B-4752-2010
OI Butler, James/0000-0002-4794-7176; Jensen, Kevin/0000-0001-8644-1680;
Pate, Bradford/0000-0002-3288-2947
FU Office of Naval Research
FX We gratefully acknowledge funding by the Office of Naval Research.
NR 3
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 521
EP +
DI 10.1109/IVELEC.2009.5193460
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800232
ER
PT B
AU Kirshner, MF
Kowalczyk, RD
Wilsen, CB
True, RB
Chernyavskiy, IA
Vlasov, A
AF Kirshner, Mark F.
Kowalczyk, Richard D.
Wilsen, Craig B.
True, Richard B.
Chernyavskiy, Igor A.
Vlasov, Alexander
GP IEEE
TI High Power X-Band Klystron
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE Klystron; X-band; high power; linear accelerator; radar; DEMEOS; TESLA
AB L-3 Communications Electron Devices Division (EDD) is developing a 9.3 GHz, 5 MW peak, 20 kW average power klystron suitable for use in linear accelerator and radar applications. Generating RF power of this magnitude within the confines of a relatively small sized X-band RF circuit is a significant challenge. A discussion of the design methodology and simulation tools used to accomplish this task will be presented, as will hot test data from the first prototype.
C1 [Kirshner, Mark F.; Kowalczyk, Richard D.; Wilsen, Craig B.; True, Richard B.] L3 Commun Electron Devices, 960 Ind Rd, San Carlos, CA 94070 USA.
[Chernyavskiy, Igor A.] Sci Applicat Int Corp, Mclean, VA 22102 USA.
[Vlasov, Alexander] US Navy, Res Lab, Washington, DC 20375 USA.
RP Kirshner, MF (reprint author), L3 Commun Electron Devices, 960 Ind Rd, San Carlos, CA 94070 USA.
EM mark.kirshner@L-3com.com
NR 2
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 535
EP +
DI 10.1109/IVELEC.2009.5193446
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800239
ER
PT B
AU Abe, DK
Kishek, R
Petillo, JJ
Chernin, DP
Levush, B
AF Abe, David K.
Kishek, Rami
Petillo, John J.
Chernin, David P.
Levush, Baruch
GP IEEE
TI A Design Study of a Permanent Magnet Quadrupole Focused Helix
Traveling-Wave Tube
SO 2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE
SE IEEE International Vacuum Electronics Conference IVEC
LA English
DT Proceedings Paper
CT 10th IEEE International Vacuum Electronics Conference
CY APR 28-30, 2009
CL Angelicum Univ, Rome, ITALY
SP European Space Agcy, IEEE Electron Devices Soc, Univ Roma Tor Vergata, CST, SELEX GALILEO
HO Angelicum Univ
DE Permanent magnet quadrupole focusing; traveling-wave tube; TWT
AB Periodic permanent magnet quadrupole (PMQ) lattices have the potential to provide the strong focusing required to successfully transport higher current beams than conventional PPM lattices. We present a design example of a PMQ lattice optimized for a 16 kV, 0.81 A beam along with particle simulations using the electron transport code, MICHELLE 3D. We also present analyses of the interaction of the elliptical beam formed in the PMQ lattice with a helical traveling-wave circuit to provide insights into the advantages afforded by PMQ focusing.
C1 [Abe, David K.; Levush, Baruch] US Naval Res Lab, Vacuum Elect Branch, Code 6841,4555 Overlook Ave SW, Washington, DC 20375 USA.
[Kishek, Rami; Petillo, John J.; Chernin, David P.] Sci Applicat Int Corp, Mclean, VA 22102 USA.
RP Abe, DK (reprint author), US Naval Res Lab, Vacuum Elect Branch, Code 6841,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM david.abe@nrl.navy.mil
RI Abe, David/D-7546-2013
FU U.S. Office of Naval Research
FX This work was supported by the U.S. Office of Naval Research.
NR 5
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3500-5
J9 IEEE INT VAC ELECT C
PY 2009
BP 554
EP +
DI 10.1109/IVELEC.2009.5193465
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BOP78
UT WOS:000277253800248
ER
PT S
AU Jachowski, DR
Rauscher, C
AF Jachowski, Douglas R.
Rauscher, Christen
GP IEEE
TI Frequency-Agile Bandstop Filter with Tunable Attenuation
SO 2009 IEEE/MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM, VOLS 1-3
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE/MTT-S International Microwave Symposium
CY JUN 07-12, 2009
CL Boston, MA
SP IEEE MTTS
AB A frequency-agile bandstop filter technology with tunable stopband attenuation and constant absolute bandwidth is described. The technology is demonstrated by a six-resonator planar microstrip filter with simultaneous varactor-diode tuning of stopband attenuation from 30dB to 50dB and of operating frequency from 1.8 GHz to 2.2 GHz, with a stopband bandwidth of 60 MHz and absolute 3dB bandwidth of less than 390 MHz.
C1 [Jachowski, Douglas R.; Rauscher, Christen] USN, Res Lab, Div Elect Sci & Technol, Microwave Technol Branch, Washington, DC 20375 USA.
RP Jachowski, DR (reprint author), USN, Res Lab, Div Elect Sci & Technol, Microwave Technol Branch, Washington, DC 20375 USA.
NR 10
TC 21
Z9 21
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4244-2803-8
J9 IEEE MTT S INT MICR
PY 2009
BP 649
EP 652
DI 10.1109/MWSYM.2009.5165780
PG 4
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BMS89
UT WOS:000273507400164
ER
PT S
AU Guyette, AC
Hunter, IC
Pollard, RD
AF Guyette, Andrew C.
Hunter, Ian C.
Pollard, Roger D.
GP IEEE
TI Design of Absorptive Microwave Filters using Allpass Networks in a
Parallel-Cascade Configuration
SO 2009 IEEE/MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM, VOLS 1-3
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE/MTT-S International Microwave Symposium
CY JUN 07-12, 2009
CL Boston, MA
SP IEEE MTTS
DE Microwave filters; microstrip filters
AB A new approach to designing absorptive microwave filters using allpass networks in a parallel-cascade configuration is presented. A signal is divided into two paths, each comprised of a number of cascaded allpass networks. The two signals are then recombined, and frequency selectivity results from phase cancellation. It is shown that this approach is especially useful for dissipative loss compensation. A general method for designing the microwave allpass networks is given. Bandpass and bandstop microstrip prototypes were designed, built, and tested.
C1 [Guyette, Andrew C.] USN, Res Lab, Div Elect Sci & Technol, Microwave Technol Branch, Washington, DC 20375 USA.
[Hunter, Ian C.; Pollard, Roger D.] Univ Leeds, Inst Microwaves & Photon, Sch Elect & Elect Engn, Leeds LS2 9JT, West Yorkshire, England.
RP Guyette, AC (reprint author), USN, Res Lab, Div Elect Sci & Technol, Microwave Technol Branch, Washington, DC 20375 USA.
NR 5
TC 8
Z9 8
U1 1
U2 6
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4244-2803-8
J9 IEEE MTT S INT MICR
PY 2009
BP 733
EP +
DI 10.1109/MWSYM.2009.5165801
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BMS89
UT WOS:000273507400185
ER
PT S
AU Joyce, RA
Qi, H
Fehlner, TP
Lent, CS
Orlov, AO
Snider, GL
AF Joyce, Robin A.
Qi, Hua
Fehlner, Thomas P.
Lent, Craig S.
Orlov, Alexei O.
Snider, Gregory L.
GP IEEE
TI A System to Demonstrate the Bistability in Molecules for Application in
a Molecular QCA Cell
SO 2009 IEEE NANOTECHNOLOGY MATERIALS AND DEVICES CONFERENCE
SE IEEE Nanotechnology Materials and Devices Conference
LA English
DT Proceedings Paper
CT IEEE Nanotechnology Materials and Devices Conference
CY JUN 02-05, 2009
CL Traverse City, MI
SP IEEE
ID AUTOMATA
AB We present a system to test the bistabitity of individual molecules for application in a QCA cell. The system presented consists of two polysilicon gate electrodes which sit adjacent to two highly-doped windows of silicon to which molecules can be bound. To enable the detection of switching activity the two highly doped regions are electrically connected to the island of a single-electron transistor (SET) which serves as an electrometer. Using this design we facilitate a differential measurement approach where a single molecular switching event should be seen in the conductance of the SET.
C1 [Joyce, Robin A.; Fehlner, Thomas P.; Lent, Craig S.; Orlov, Alexei O.; Snider, Gregory L.] Univ Notre Dame, Notre Dame, IN 46556 USA.
[Qi, Hua] Naval Res Lab, Washington, DC 20375 USA.
RP Joyce, RA (reprint author), Univ Notre Dame, Notre Dame, IN 46556 USA.
EM rjoyce2@nd.edu; huaqi@ccs.nrl.navy.mil
FU National Science Foundation [CCR-0210153, CCF-0403760]
FX Manuscript received April 20, 2009. This work was supported in part by
the National Science Foundation under Grants CCR-0210153 and
CCF-0403760.
NR 5
TC 3
Z9 3
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2378-377X
BN 978-1-4244-4695-7
J9 IEEE NANOTECHNOL MAT
PY 2009
BP 46
EP +
DI 10.1109/NMDC.2009.5167543
PG 2
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BMU53
UT WOS:000273600300012
ER
PT S
AU Christophersen, M
Phlips, BF
Sadrozinski, HFW
Fadeyev, V
AF Christophersen, Marc
Phlips, Bernard F.
Sadrozinski, Hartmut F. -W.
Fadeyev, Vitaliy
BE Yu, B
TI Photo-Patterned Silicone Bump Bonds for Sensor Interconnects
SO 2009 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-5
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium Conference 2009
CY OCT 25-31, 2009
CL Orlando, FL
SP IEEE, Nucl Plasma Sci Sect, IEEE
AB Bump bonding is the standard approach for flexible PDMS bumps should allow good contacts to these connecting pixel sensors with read-out ASICS. Current fine- and other brittle materials. pitch bump bonds lead to permanent bonds. We use photo-patternable silicone (polydimethylsiloxane, or PDMS) in combination with a metal coating to generate flexible and metal contact reversible bump bonds. This process requires only a relatively low temperature, <150 degrees C, and leads to very homogeneous bump height, because the PDMS is applied by spin-coating. The technique is also applicable to brittle materials, where wire-bonding is problematic, such as gamma-ray detectors based on CdZnTe and CdTe. This paper describes the general concept and presents first results.
C1 [Christophersen, Marc; Phlips, Bernard F.] USN, Res Lab, Washington, DC 20375 USA.
RP Christophersen, M (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM marc.christophersen@nrl.nvay.mil; phlips@nrl.nvay.mil;
hartmut@scipp.ucsc.edu; vf@scipp.ucsc.edu
RI Christophersen, Marc/B-6795-2008
NR 7
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-3961-4
J9 IEEE NUCL SCI CONF R
PY 2009
BP 103
EP 106
DI 10.1109/NSSMIC.2009.5401855
PG 4
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA BQA51
UT WOS:000280505100020
ER
PT S
AU Mitchell, LJ
Phlips, BF
Johnson, WN
Wulf, EA
Hutcheson, AL
Lister, CJ
Bynum, KD
Leas, BE
Guadagno, G
AF Mitchell, Lee J.
Phlips, Bernard F.
Johnson, W. Neil
Wulf, Eric A.
Hutcheson, Anthony L.
Lister, C. J.
Bynum, Kelia D.
Leas, Byron E.
Guadagno, Gerald
BE Yu, B
TI Mobile Imaging and Spectroscopic Threat Identification (MISTI): System
Overview
SO 2009 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-5
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium Conference 2009
CY OCT 25-31, 2009
CL Orlando, FL
SP IEEE, Nucl Plasma Sci Sect, IEEE
DE Gamma-ray Imaging; Gamma-Ray Spectroscopy Detectors; Nuclear Imaging;
Homeland Security
AB The Mobile Imaging and Spectroscopic Threat Identification (MISTI) system developed to locate radiological threats in urban and rural environments is currently undergoing characterization activities. MISTI is a mobile source detection and imaging system designed to identify and localize a radiological source to within +/- 10m in range. This requirement is based on a 1 mCi Cs-137 source at 100 m in 20s, while maintaining a false alarm rate of less than one per day. MISTI utilizes the cost effective collection power of NaI for imaging and the sensitivity of high resolution HPGe for spectroscopy. MISTI's data acquisition system was developed with the latest commercially availed hardware that met MISTI's requirements. The performance of crucial software and hardware components is presented along with overall system performance. A synopsis and example of the initial characterization results are presented here.
C1 [Mitchell, Lee J.; Hutcheson, Anthony L.] CNR, High Energy Space Environm Branch, NRL, Washington, DC 20375 USA.
RP Mitchell, LJ (reprint author), CNR, High Energy Space Environm Branch, NRL, Code 7654, Washington, DC 20375 USA.
EM lee.mitchell.ctr@nrl.navy.mil; bernard.phlips@nrl.navy.mil;
neil.johnson@nrl.navy.mil; eric.wulf@nrl.navy.mil;
anthony.hutcheson.ctr@nrl.navy.mil; lister@anl.gov;
kelia.bynum@nrl.navy.mil; byron.leas.ctr@nrl.navy.mil;
gerald.guadagno@nrl.navy.mil
RI Wulf, Eric/B-1240-2012; Johnson, Neil/G-3309-2014
NR 7
TC 10
Z9 10
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-3961-4
J9 IEEE NUCL SCI CONF R
PY 2009
BP 110
EP 118
DI 10.1109/NSSMIC.2009.5401849
PG 9
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA BQA51
UT WOS:000280505100022
ER
PT S
AU Hutcheson, AL
Phlips, BF
AF Hutcheson, Anthony L.
Phlips, Bernard F.
BE Yu, B
TI A Liquid Scintillator Fast Neutron Double-Scatter Imager
SO 2009 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-5
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium Conference 2009
CY OCT 25-31, 2009
CL Orlando, FL
SP IEEE, Nucl Plasma Sci Sect, IEEE
AB A liquid scintillator fast neutron imager based on double-scatter neutron detection is in development for the purpose of identifying and locating special nuclear materials. A prototype instrument is being tested consisting of two planes of four 1 m x 5 cm x 5 cm liquid scintillator detectors each viewed at either end by a photomultiplier tube. The instrument is capable of reconstructing energy and location of a source of fast neutrons via time-of-flight and neutron double-scatter techniques. Pulse shape discrimination is utilized to separate neutron signals from gamma-ray background.
C1 [Hutcheson, Anthony L.; Phlips, Bernard F.] USN, Res Lab, High Energy Space Environm Branch, Washington, DC 20375 USA.
RP Hutcheson, AL (reprint author), USN, Res Lab, High Energy Space Environm Branch, Code 7651, Washington, DC 20375 USA.
EM anthony.hutcheson.ctr@nrl.navy.mil; bernard.phlips@nrl.navy.mil
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-3961-4
J9 IEEE NUCL SCI CONF R
PY 2009
BP 1126
EP 1128
DI 10.1109/NSSMIC.2009.5402406
PG 3
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA BQA51
UT WOS:000280505100243
ER
PT S
AU Christophersen, M
Phlips, BF
AF Christophersen, Marc
Phlips, Bernard F.
BE Yu, B
TI 200 mm Silicon Wafer Processing for Large Area Strip Detectors
SO 2009 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-5
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium Conference 2009
CY OCT 25-31, 2009
CL Orlando, FL
SP IEEE, Nucl Plasma Sci Sect, IEEE
ID TELESCOPE
AB We developed large silicon single-sided strip detectors made of 200 mm float-zone Si wafers. The single-sided silicon strip detectors have an effective active area of 156 cm(2) and 725 mu m in thickness and were fully depleted. Basic performance was measured using Am-241 and Co-57 sources. The leakage current varied from strip to strip due to some contaminations during the processing.
C1 [Christophersen, Marc; Phlips, Bernard F.] USN, Res Lab, Washington, DC 20375 USA.
RP Christophersen, M (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM marc.christophersen@nrl.nvay.mil; phlips@nrl.nvay.mil
RI Christophersen, Marc/B-6795-2008
NR 9
TC 2
Z9 2
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4244-3961-4
J9 IEEE NUCL SCI CONF R
PY 2009
BP 1649
EP 1652
DI 10.1109/NSSMIC.2009.5402245
PG 4
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA BQA51
UT WOS:000280505100357
ER
PT B
AU Caldwell, J
Robertson, C
AF Caldwell, James
Robertson, Clark
GP IEEE
TI M-ary Hyper Phase-Shift Keying Over Non-Linear Satellite Channels
SO 2009 IEEE PACIFIC RIM CONFERENCE ON COMMUNICATIONS, COMPUTERS AND SIGNAL
PROCESSING, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT IEEE Pacific Rim Conference on Communications, Computers and Signal
Processing
CY AUG 23-26, 2009
CL Victoria, CANADA
SP IEEE
DE spectral efficiency; orthonormal; phase-shift keying; probability of bit
error; forward error correction
ID CODES
AB Forward error correction (FEC) coding in conjunction with M-ary hyper phase-shift keying (MHPSK) is considered in order to improve the robustness of a high spectral efficiency, non-linear satellite communications link. MHPSK is a spectrally efficient modulation technique that uses four orthonormal basis functions to increase the Euclidean distance between different symbols in the signal space. The use of four orthonormal basis functions provides an advantage over traditional spectrally efficient modulation techniques such as M-ary phase-shift keying (MPSK) and M-ary quadrature amplitude modulation (MQAM) that only possess two degrees of freedom. MHPSK offers an improvement in probability of bit error performance over other spectrally efficient modulation techniques for the same average energy per bit-to-noise power spectral density ratio and the same spectral efficiency. As a result, MHPSK offers a novel way to improve both throughput and reduce power requirements using easy to generate waveforms. MHPSK and two-subcarrier orthogonal frequency division multiplexing (OFDM) with 8-PSK or 8-QAM on each subcarrier are compared in terms of the effect of peak-to-average power ratio and required amplifier backoff on the probability of bit error. In this paper, long block length Reed Solomon (RS) codes are used to encode information symbols which are then transmitted with MHPSK. Additionally, a comparison is made with two-subcarrier OFDM that uses 8-PSK or 8-QAM on each subcarrier and utilizing the Digital Video Broadcast (DVB) standard rate 0.9 low density parity check (LDPC) code commonly employed in non-linear satellite communications. As such, MHPSK and two-subcarrier OFDM with 8-QAM or 8-PSK on each subcarrier are compared in terms of probability of bit error, peak-to-average power ratio, amplifier backoff, and bandwidth efficiency using long forward error correction code block lengths.
C1 [Caldwell, James; Robertson, Clark] USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93940 USA.
RP Caldwell, J (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93940 USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4560-8
PY 2009
BP 23
EP 28
DI 10.1109/PACRIM.2009.5291402
PG 6
WC Computer Science, Theory & Methods; Engineering, Electrical &
Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BPR97
UT WOS:000279748100005
ER
PT B
AU Lekkakos, D
Robertson, RC
AF Lekkakos, Dimitrios
Robertson, R. Clark
GP IEEE
TI Performance Analysis of a LINK-16/JTIDS Compatible Waveform Transmitted
over a Channel with Pulse-Noise Interference
SO 2009 IEEE PACIFIC RIM CONFERENCE ON COMMUNICATIONS, COMPUTERS AND SIGNAL
PROCESSING, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT IEEE Pacific Rim Conference on Communications, Computers and Signal
Processing
CY AUG 23-26, 2009
CL Victoria, CANADA
SP IEEE
AB The Joint Tactical Information Distribution System (JTIDS) is a hybrid frequency-hoped, direct sequence spread spectrum system that utilizes a (31, 15) Reed-Solomon (RS) code and cyclical code-shift keying (CCSK) modulation for the data packets, where each encoded symbol consists of five bits. In this paper, an alternative waveform compatible with the existing JTIDS direct sequence spread spectrum channel waveform is analyzed. The system considered uses the same (31, 15) RS encoding as the original JTIDS but uses 32-ary orthogonal signaling with 32 chip baseband waveforms such as Walsh functions instead of CCSK. Currently, the JTIDS waveform is received noncoherently at the chip level, but in this paper the performance of the alternative, JTIDS-compatible waveform is evaluated for coherent as well as for noncoherent demodulation in order to ascertain the performance possible if coherent demodulation were practical. For coherent demodulation, each pair of five-bit symbols at the output of the RS encoder is assumed to undergo serial-to-parallel conversion to two five-bit symbols, which are then independently transmitted on the in-phase and quadrature component of the carrier, with the result that the data rate for coherent demodulation is twice that for noncoherent demodulation. The performance of the alternative waveform for the relatively benign case where additive white Gaussian noise is the only noise present as well as when pulse-noise interference is present is investigated for both coherent and noncoherent demodulation.
C1 [Lekkakos, Dimitrios; Robertson, R. Clark] USN, Postgrad Sch, Dept Elect & Comp Engn, Grad Sch Engn & Appl Sci, Monterey, CA 93943 USA.
RP Lekkakos, D (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, Grad Sch Engn & Appl Sci, Monterey, CA 93943 USA.
NR 8
TC 3
Z9 3
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4560-8
PY 2009
BP 29
EP 34
DI 10.1109/PACRIM.2009.5291403
PG 6
WC Computer Science, Theory & Methods; Engineering, Electrical &
Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BPR97
UT WOS:000279748100006
ER
PT B
AU Oliver, BV
Berninger, M
Cooperstein, G
Cordova, S
Crain, D
Droemer, D
Haines, T
Hinshelwood, D
King, N
Lutz, S
Miller, CL
Molina, I
Mosher, D
Nelson, D
Ormond, E
Portillo, S
Smith, J
Webb, T
Welch, DR
Wood, W
Ziska, D
AF Oliver, B. V.
Berninger, M.
Cooperstein, G.
Cordova, S.
Crain, D.
Droemer, D.
Haines, T.
Hinshelwood, D.
King, N.
Lutz, S.
Miller, C. L.
Molina, I.
Mosher, D.
Nelson, D.
Ormond, E.
Portillo, S.
Smith, J.
Webb, T.
Welch, D. R.
Wood, W.
Ziska, D.
GP IEEE
TI CHARACTERIZATION OF THE ROD-PINCH DIODE X-RAY SOURCE ON CYGNUS
SO 2009 IEEE PULSED POWER CONFERENCE, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 17th IEEE International Pulsed Power Conference
CY JUN 28-JUL 02, 2009
CL Washington, DC
SP IEEE, POWEREX, TECH X, Gen Atom Elect Syst, HVR, Silicon Power, Stangenes Ind, Appl Energet, ABB, SBE, ULTRAVOLT, Barth Elect, pulsetech, TDK LAMBDA, Kumamoto Univ, Diversified Technologies, CKE, HVCA
AB The rod-pinch diode[1] is a self-magnetically insulated electron beam diode that is capable of producing a very bright source of hard x-rays. As fielded on the Cygnus accelerator[2], the diode operates at an impedance of 50 Ohms and produces short pulse (similar to 50 ns) bremsstrahlung radiation with a 2 MeV photon endpoint energy and dose of 4 rad measured at one meter, with an x-ray spot size similar to 1mm. The source can be used to image through similar to 40 g/cm(2) of material with spatial resolution of order 300 mu m. Recently, a series of experiments on Cygnus have been conducted to better characterize the diode's operation and x-ray output. In particular, the x-ray spectral content, source spot-size, and shot-to-shot reproducibility have been diagnosed. The intent of these experiments is to enable improvements that may extend the diode's radiographic utility. An array of diagnostics have been utilized which include, end-on and side view x-ray pin hole imaging, time resolved and time integrated spot size measurements, step wedges, x-ray p-i-n diodes, and diode/MITL current measurements. High fidelity, PIC/Monte-Carlo simulations have also been conducted to help analyze the data. An overview of these experiments, simulations, and the conclusions from analysis is presented.
C1 [Oliver, B. V.; Cordova, S.; Molina, I.; Nelson, D.; Ormond, E.; Webb, T.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
[Haines, T.; King, N.; Smith, J.; Wood, W.] Los Alamos Natl Labs, Los Alamos, NM 87545 USA.
[Crain, D.; Droemer, D.; Lutz, S.] Natl Secur Technol, Las Vegas, NV 89193 USA.
[Cooperstein, G.; Hinshelwood, D.] US Navy, Res Lab, Washington, DC 20375 USA.
[Miller, C. L.; Welch, D. R.] Voss Sci LLC, Albuquerque, NM 87108 USA.
[Portillo, S.; Ziska, D.] Ktech Corp Inc, Albuquerque, NM 87123 USA.
RP Oliver, BV (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
FU U.S. Department of Energy through Sandia National Laboratories;
[DE-AC04-94AL85000]
FX This work is funded by the U.S. Department of Energy through Sandia
National Laboratories. Sandia is a multiprogram laboratory operated by
Sandia Corporation, a Lockheed Martin Company, for the United States
Department of Energy's National Nuclear Security Administration under
contract DE-AC04-94AL85000.
NR 11
TC 2
Z9 2
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4064-1
PY 2009
BP 11
EP +
DI 10.1109/PPC.2009.5386210
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPZ37
UT WOS:000280423800002
ER
PT B
AU Mosher, D
Hinshelwood, DD
Cooperstein, G
Huhman, B
Allen, RJ
Lutz, SS
Berninger, MJ
Oliver, BV
Portillo, S
Haines, T
AF Mosher, David
Hinshelwood, David D.
Cooperstein, Gerald
Huhman, Brett
Allen, Raymond J.
Lutz, Stephen S.
Berninger, Michael J.
Oliver, Bryan V.
Portillo, Salvador
Haines, Todd
GP IEEE
TI X-RAY ABSORPTION AND SCATTERING ISSUES FOR ROD-PINCH RADIOGRAPHIC
SOURCES
SO 2009 IEEE PULSED POWER CONFERENCE, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 17th IEEE International Pulsed Power Conference
CY JUN 28-JUL 02, 2009
CL Washington, DC
SP IEEE, POWEREX, TECH X, Gen Atom Elect Syst, HVR, Silicon Power, Stangenes Ind, Appl Energet, ABB, SBE, ULTRAVOLT, Barth Elect, pulsetech, TDK LAMBDA, Kumamoto Univ, Diversified Technologies, CKE, HVCA
ID DIODES
AB During the past decade, the rod-pinch diode has been used extensively for high-brightness, megavolt x-ray radiography. Success of the rod pinch derives from its small radiographic spot size for a range of driving voltages and x-ray spectra. Here, we examine two experimentally observed and more subtle phenomena that may impact radiographic performance for some systems: flat-field nonuniformity in the image plane due to x-ray absorption in the rod, and weak, large-scale structures around radiographic features due to cathode-scattered x-rays. X-ray imaging data from Cygnus and HRS are analyzed by the ITS Monte Carlo codes to determine if these phenomena are significant for Cygnus.
C1 [Mosher, David; Hinshelwood, David D.; Cooperstein, Gerald; Huhman, Brett; Allen, Raymond J.] USN, Res Lab, Div Plasma Phys, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[Lutz, Stephen S.; Berninger, Michael J.] Natl Secur Technol, Santa Barbara, CA 93111 USA.
[Oliver, Bryan V.] Sandia Natl Labs, Adv Radiog Tech, Albuquerque, NM 87185 USA.
[Portillo, Salvador] Ktech Corp Inc, Albuquerque, NM 87123 USA.
[Haines, Todd] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
RP Mosher, D (reprint author), USN, Res Lab, Div Plasma Phys, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM mosher@suzie.nrl.navy.mil
FU Sandia National Laboratories; multiprogram laboratory operated by Sandia
Corporation; Lockheed Martin Company; United States Department of
Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
FX Work supported through Sandia National Laboratories, a multiprogram
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the United States Department of Energys National Nuclear Security
Administration under contract DE-AC04-94AL85000.
NR 7
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4064-1
PY 2009
BP 28
EP +
DI 10.1109/PPC.2009.5386207
PG 3
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPZ37
UT WOS:000280423800005
ER
PT B
AU Harper-Slaboszewicz, VJ
Mikkelson, KA
Weber, BV
Murphy, DP
Commisso, RJ
Goyer, JR
Riordan, JC
AF Harper-Slaboszewicz, V. J.
Mikkelson, K. A.
Weber, B. V.
Murphy, D. P.
Commisso, R. J.
Goyer, J. R.
Riordan, J. C.
GP IEEE
TI POLARITY INVERSION ON SATURN
SO 2009 IEEE PULSED POWER CONFERENCE, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 17th IEEE International Pulsed Power Conference
CY JUN 28-JUL 02, 2009
CL Washington, DC
SP IEEE, POWEREX, TECH X, Gen Atom Elect Syst, HVR, Silicon Power, Stangenes Ind, Appl Energet, ABB, SBE, ULTRAVOLT, Barth Elect, pulsetech, TDK LAMBDA, Kumamoto Univ, Diversified Technologies, CKE, HVCA
AB Saturn is a pulsed power accelerator consisting of 36 parallel modules producing 10 MA at 1.7 MV in a 40 ns power pulse[1]. Saturn is built to operate in negative polarity. Two methods of inverting the polarity in vacuum and driving up to 2.5 MA into a triplate MITL with a low impedance load have been built and demonstrated. Both rely on the use of a ballast inductance to invert the polarity[2]. The first method uses a dual post-hole convolute while the second method uses no convolutes.
C1 [Harper-Slaboszewicz, V. J.; Mikkelson, K. A.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
[Weber, B. V.; Murphy, D. P.; Commisso, R. J.] US Navy, Res Lab, Washington, DC 20375 USA.
[Goyer, J. R.; Riordan, J. C.] L3 Pulse Sci, San Leandro, CA 94577 USA.
RP Harper-Slaboszewicz, VJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
FU [DE-AC04-94AL85000]
FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a
Lockheed Martin Company,for the United States Department of Energys
National Nuclear Security Administration under contract
DE-AC04-94AL85000
NR 2
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4064-1
PY 2009
BP 146
EP +
DI 10.1109/PPC.2009.5386246
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPZ37
UT WOS:000280423800027
ER
PT B
AU Hinshelwood, D
Jackson, SL
Allen, RJ
Commisso, RJ
Cooperstein, G
Mosher, D
Murphy, DP
Ottinger, PF
Schumer, JW
Swanekamp, SB
Weber, BV
Young, FC
AF Hinshelwood, David
Jackson, S. L.
Allen, R. J.
Commisso, R. J.
Cooperstein, G.
Mosher, D.
Murphy, D. P.
Ottinger, P. F.
Schumer, J. W.
Swanekamp, S. B.
Weber, B. V.
Young, F. C.
GP IEEE
TI High-Voltage, High-Impedance Ion Beam Production
SO 2009 IEEE PULSED POWER CONFERENCE, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 17th IEEE International Pulsed Power Conference
CY JUN 28-JUL 02, 2009
CL Washington, DC
SP IEEE, POWEREX, TECH X, Gen Atom Elect Syst, HVR, Silicon Power, Stangenes Ind, Appl Energet, ABB, SBE, ULTRAVOLT, Barth Elect, pulsetech, TDK LAMBDA, Kumamoto Univ, Diversified Technologies, CKE, HVCA
AB A high-power, high-impedance ion beam diode has been fielded on the Mercury inductive voltage adder at typical parameters of 4 MV, 360 kA, and 70-90-kA ion current. These results are consistent with theory and with LSP calculations. This beam is focused onto a CF(2) target to produce characteristic gammas via the (19)F(p,alpha gamma)(16)O reaction. Diagnostics characterize the ion emission from the anode, the beam distribution on the target, and the gamma yield. Shaping the anode surface improves beam focusing on the target. Our experimental arrangement allows us to resolve the gamma signal in the presence of the diode bremsstrahlung, and to minimize spurious neutron production. The calculated gamma yield exceeds 10(11) gammas/sr.
C1 [Hinshelwood, David; Jackson, S. L.; Allen, R. J.; Commisso, R. J.; Cooperstein, G.; Mosher, D.; Murphy, D. P.; Ottinger, P. F.; Schumer, J. W.; Swanekamp, S. B.; Weber, B. V.; Young, F. C.] USN, Div Plasma Phys, Res Lab, Washington, DC 20375 USA.
RP Hinshelwood, D (reprint author), USN, Div Plasma Phys, Res Lab, Washington, DC 20375 USA.
EM ddh@suzie.nrl.navy.mil
NR 9
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4064-1
PY 2009
BP 227
EP 232
DI 10.1109/PPC.2009.5386248
PG 6
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPZ37
UT WOS:000280423800042
ER
PT B
AU Huhman, BM
Neri, JM
Lockner, TL
AF Huhman, B. M.
Neri, J. M.
Lockner, T. L.
GP IEEE
TI EFFECT OF RESISTANCE MODIFICATION ON EML CAPACITOR BANK PERFORMANCE
SO 2009 IEEE PULSED POWER CONFERENCE, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 17th IEEE International Pulsed Power Conference
CY JUN 28-JUL 02, 2009
CL Washington, DC
SP IEEE, POWEREX, TECH X, Gen Atom Elect Syst, HVR, Silicon Power, Stangenes Ind, Appl Energet, ABB, SBE, ULTRAVOLT, Barth Elect, pulsetech, TDK LAMBDA, Kumamoto Univ, Diversified Technologies, CKE, HVCA
ID RAILGUN
AB The U.S. Navy is considering the development of an electromagnetic launcher (EML) for surface-fire support and other missions [1]. The Naval Research Laboratory has initiated a program to develop and test materials to achieve these fire rates and lifetimes [2]. The U.S. Naval Research Laboratory has assembled a facility to develop and test materials for the study of barrel lifetime in electromagnetic launchers (EML) for surface-fire support and other missions [3].
The pulsed power system utilizes several modules that can be individually triggered to shape the output current pulse. Each bank module consists of capacitors from General Atomics Electronics Systems. The switching thyristors and crowbar diodes are from ABB. A series inductor is used to limit the peak current, isolate modules from each other, and ensure the current is delivered to the test system. Several launch events have been performed, and the pulsed power systems have operated as intended [3].
The capacitor bank modules were originally designed with minimum output resistance to obtain the maximum L/R decay time into the launcher. Modification of a module to allow for a variable output resistance is highly desirable to modify the output waveform of the bank module system, such as limiting the late-time current. NRL has designed resistance packages that can be easily inserted into a specific bank to modify the damping of the current. The effect of the resistance will be shown at various power levels and the resulting effect on switch action, capacitor voltage reversal, and output current will be demonstrated. Computer modeling of the modifications will also be discussed.
C1 [Huhman, B. M.; Neri, J. M.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Lockner, T. L.] Global Strateg Grp, Crofton, MD 7136 USA.
[Lockner, T. L.] Global Strateg Grp, Washington, DC 20549 USA.
RP Huhman, BM (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM brett.huhman@nrl.navy.mil
FU US Office of Naval Research
FX Word supported by the US Office of Naval Research
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4064-1
PY 2009
BP 754
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPZ37
UT WOS:000280423800149
ER
PT B
AU Struve, KW
Bennett, LF
Davis, JP
Savage, ME
Stoltzfus, BS
Waugh, CJ
Hinshelwood, DD
Wagoner, TC
AF Struve, K. W.
Bennett, L. F.
Davis, J-P.
Savage, M. E.
Stoltzfus, B. S.
Waugh, C. J.
Hinshelwood, D. D.
Wagoner, T. C.
GP IEEE
TI COMPARISON OF THE PERFORMANCE OF THE UPGRADED Z WITH CIRCUIT PREDICTIONS
SO 2009 IEEE PULSED POWER CONFERENCE, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 17th IEEE International Pulsed Power Conference
CY JUN 28-JUL 02, 2009
CL Washington, DC
SP IEEE, POWEREX, TECH X, Gen Atom Elect Syst, HVR, Silicon Power, Stangenes Ind, Appl Energet, ABB, SBE, ULTRAVOLT, Barth Elect, pulsetech, TDK LAMBDA, Kumamoto Univ, Diversified Technologies, CKE, HVCA
AB Since the completion of the ZR upgrade of the Z accelerator at the Sandia National Laboratories in the fall of 2007, many shots have been taken on the accelerator, and there has been much opportunity to compare circuit-code predictions of the performance of the machine with actual measurements. We therefore show comparisons of measurements, and describe a full-circuit, 36-line Bertha circuit model of the machine. The model has been used for both short-pulse and long-pulse (tailored pulse) modes of operation. We also present the as-built circuit parameters of the machine and indicate how these were derived. We discuss enhancements to the circuit model that include 2D effects in the water lines, but show that these have little effect on the fidelity of the simulations. Finally, we discuss how further improvements can be made to handle azimuthal coupling of the multiple lines at the vacuum insulator stack.
C1 [Struve, K. W.; Bennett, L. F.; Davis, J-P.; Savage, M. E.; Stoltzfus, B. S.; Waugh, C. J.] Sandia Natl Labs, Pulsed Power Sci Ctr, POB 5800, Albuquerque, NM 87185 USA.
[Hinshelwood, D. D.] Naval Res Lab, Washington, DC 20375 USA.
[Wagoner, T. C.] Ktech Corp Inc, Albuquerque, NM USA.
RP Struve, KW (reprint author), Sandia Natl Labs, Pulsed Power Sci Ctr, POB 5800, Albuquerque, NM 87185 USA.
NR 8
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4064-1
PY 2009
BP 1144
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPZ37
UT WOS:000280423800228
ER
PT B
AU Allen, RJ
Berry, CL
Commisso, RJ
Featherstone, E
Fisher, R
Cooperstein, G
Hinshelwood, DD
Jackson, SL
Miller, AT
Ottinger, PF
Phipps, DG
Schumer, JW
AF Allen, R. J.
Berry, C. L.
Commisso, R. J.
Featherstone, E.
Fisher, R.
Cooperstein, G.
Hinshelwood, D. D.
Jackson, S. L.
Miller, A. T.
Ottinger, P. F.
Phipps, D. G.
Schumer, J. W.
GP IEEE
TI Conversion of Mercury (a 2-TW Inductive Voltage Adder) to Positive
Polarity
SO 2009 IEEE PULSED POWER CONFERENCE, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 17th IEEE International Pulsed Power Conference
CY JUN 28-JUL 02, 2009
CL Washington, DC
SP IEEE, POWEREX, TECH X, Gen Atom Elect Syst, HVR, Silicon Power, Stangenes Ind, Appl Energet, ABB, SBE, ULTRAVOLT, Barth Elect, pulsetech, TDK LAMBDA, Kumamoto Univ, Diversified Technologies, CKE, HVCA
AB After 616 shots in a negative polarity configuration, Mercury, a 6-MV and 300-kA inductive voltage adder (IVA), has been converted to positive polarity in order to extract ion beams. Conversion to positive polarity was achieved by rotating all six of the adder cells by 180 degrees. In principle, we could have chosen to instead insert the center conductor from the other end of the adder to change polarity, but rotating the cells minimized the time required to make the transition. Although most of the same pieces were used, the center conductor had to be reconfigured in order to align the transition pieces with the cell feed gaps.
Because the electron flow was anticipated to be very different in positive polarity, a result of emission from surfaces of different potential, a simple blade diode was fielded for the initial shots to gain a better understanding of operation in positive polarity. The blade diode consisted of the same cathode used as a dummy load in the first negative polarity shots on Mercury, but with a different carbon anode that just covered the end of the center conductor. After a few short circuit and initializing shots, a series of shots were taken where only the blade diode AK gap was varied in order to characterize self-limited and load-limited operation and to compare measurements with theory and simulation.
C1 [Allen, R. J.; Berry, C. L.; Commisso, R. J.; Featherstone, E.; Fisher, R.; Cooperstein, G.; Hinshelwood, D. D.; Jackson, S. L.; Miller, A. T.; Ottinger, P. F.; Phipps, D. G.; Schumer, J. W.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Allen, RJ (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM allen@nrl.navy.mil
NR 9
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4064-1
PY 2009
BP 1168
EP 1172
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPZ37
UT WOS:000280423800232
ER
PT B
AU Ottinger, PF
Schumer, JW
Hinshelwood, DD
Allen, RJ
AF Ottinger, P. F.
Schumer, J. W.
Hinshelwood, D. D.
Allen, R. J.
GP IEEE
TI BENCHINGMARK AND IMPLEMENTATION OF A GENERALIZED MITL FLOW MODEL
SO 2009 IEEE PULSED POWER CONFERENCE, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 17th IEEE International Pulsed Power Conference
CY JUN 28-JUL 02, 2009
CL Washington, DC
SP IEEE, POWEREX, TECH X, Gen Atom Elect Syst, HVR, Silicon Power, Stangenes Ind, Appl Energet, ABB, SBE, ULTRAVOLT, Barth Elect, pulsetech, TDK LAMBDA, Kumamoto Univ, Diversified Technologies, CKE, HVCA
AB A generalized magnetically insulated transmission line (MITL) flow model has been developed to treat dynamic MITL problems [1]. By including electron pressure in the model and allowing non-zero values of the electric field at the cathode, this MITL model can treat both emission and re-trapping of flow electrons. Most previous MITL flow models only describe equilibrium flow conditions without emission or re-trapping and cannot adequately treat dynamic situations. Such dynamic situations are common and include impedance transitions along the line, variable impedance transmission lines, coupling to loads, etc., all of which can cause electron emission from the cathode and/or electron re-trapping onto the cathode. The model is being benchmarked against particle-in-cell (PIC) simulations using the LSP code [2]. Of particular interest for this benchmarking effort is the treatment of retrapping waves that occur when the MITL is terminated by an under-matched load. Ultimately, the model will be incorporated into a transmission line code such a BERTHA [3] so that MITL problems can be studied more quickly and efficiently than with PIC codes.
C1 [Ottinger, P. F.; Schumer, J. W.; Hinshelwood, D. D.; Allen, R. J.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Ottinger, PF (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM ottinger@suzie.nrl.navy.mil
NR 7
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4064-1
PY 2009
BP 1173
EP 1176
PG 4
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPZ37
UT WOS:000280423800233
ER
PT B
AU Weber, BV
Allen, RJ
Commisso, RJ
Hinshelwood, DD
Phipps, DG
Swanekamp, SB
AF Weber, B. V.
Allen, R. J.
Commisso, R. J.
Hinshelwood, D. D.
Phipps, D. G.
Swanekamp, S. B.
GP IEEE
TI -6 MV VACUUM VOLTMETER DEVELOPMENT
SO 2009 IEEE PULSED POWER CONFERENCE, VOLS 1 AND 2
LA English
DT Proceedings Paper
CT 17th IEEE International Pulsed Power Conference
CY JUN 28-JUL 02, 2009
CL Washington, DC
SP IEEE, POWEREX, TECH X, Gen Atom Elect Syst, HVR, Silicon Power, Stangenes Ind, Appl Energet, ABB, SBE, ULTRAVOLT, Barth Elect, pulsetech, TDK LAMBDA, Kumamoto Univ, Diversified Technologies, CKE, HVCA
AB A standard voltmeter designed for measuring up to +/- 2 MV in vacuum was modified to operate at -4 to -6 MV, appropriate levels for measuring the convolute voltage during z-pinch experiments on Z. Field shaping structures are used to eliminate electron emission from the voltmeter grading rings. The voltmeter operated as expected during tests at -4 MV on the Mercury generator, indicating this voltmeter could work for the lower voltage range expected on Z. At -6 MV on Mercury, the voltmeter did not operate correctly, probably because of electron emission. Particle-in-cell modeling is consistent with the observed voltmeter response. An improved field shaper could extend the voltmeter operation to -6 MV.
C1 [Weber, B. V.; Allen, R. J.; Commisso, R. J.; Hinshelwood, D. D.; Phipps, D. G.; Swanekamp, S. B.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Weber, BV (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM bruce.weber@nrl.navy.mil
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4064-1
PY 2009
BP 1336
EP 1341
PG 6
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BPZ37
UT WOS:000280423800265
ER
PT S
AU Raj, RG
Chen, VC
Lipps, R
AF Raj, Raghu G.
Chen, Victor C.
Lipps, Ronald
GP IEEE
TI Analysis of Radar Dismount Signatures via Non-parametric and Parametric
Methods
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
AB We present novel approaches to the analysis of radar dismount signatures that entail the characterization of the time-frequency (TF) structure of the received radar signal associated with the dismount gait by both non-parametric and parametric methods. We first introduce the concept of Gaussian g-Snakes in order to parametrically characterize the TIT distribution of radar signals. In particular, we derive simple steepest descent equations that enable the estimation of the (locally) optimal g-Snake parameters for a given TF distribution. Furthermore the g-Snake modeling methodology gives us an objective unsupervised criterion from which to quantify the quality of the motion curve estimates that have been tracked from the TF data. We then formulate the non-parametric motion estimation for TF signals by a coupling of a simple partial tracking methodology in conjunction with boundary condition enforcement with regularity constraints. Finally we propose a coupling of the above non-parametric approach with g-Snake modeling that result in improved overall modeling of the given real and simulated radar TF data.
C1 [Raj, Raghu G.; Chen, Victor C.; Lipps, Ronald] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
RP Raj, RG (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 55
EP 60
PG 6
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800011
ER
PT S
AU Gregers-Hansen, V
Mital, R
AF Gregers-Hansen, Vilhelm
Mital, Rashimi
GP IEEE
TI An Empirical Sea Clutter Model for Low Grazing Angles
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
AB The most fundamental characteristic of sea clutter, as used in radar performance evaluation, is its apparent reflectivity defined as sigma(0) (m(2)/m(2)). The word apparent is used here as a reminder that any measurement of sea clutter reflectivity inevitably includes the effects of propagation close to the sea surface. Sea clutter reflectivity depends on many factors including sea state, wind velocity, grazing angle, polarization, and radar frequency. A comprehensive tabulation of measurements from around 60 sources were included in the 1991 edition of Nathanson's book [1] and this probably represents the most complete database of sea clutter reflectivity available. Also included in this book by Nathanson was a detailed description of an empirical sea clutter model proposed by Horst et. al. [2], the so-called Georgia Technical Institute (GTI) model. This model has found widespread acceptance in the radar community although its technical basis may be somewhat vague.
As pointed out by Nathanson, his tabulated measured sea clutter data does not agree too well with the GTI model, in particular at low sea states. While this difference qualitatively can be explained by measurement inaccuracies, unknown propagation conditions (such as ducting), and uncertainties in defining the underlying sea state, these discrepancies are at times quite large and may lead to overly optimistic radar performance predictions if the GTI sea clutter model is used.
In this paper a new empirical model for sea clutter reflectivity at low grazing angles is developed. The model is defined as a function of radar frequency, polarization, sea-state, and grazing angle. The parameters of the empirical equation have been optimized such that the average absolute dB-deviation between the model and the experimental data tabulated by Nathanson is minimized for grazing angles up to 10 degrees. Subsequently we shall refer to this new model as the NRL sea clutter model.
C1 [Gregers-Hansen, Vilhelm; Mital, Rashimi] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
RP Gregers-Hansen, V (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
EM vgh@cavtel.net
NR 6
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 61
EP 65
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800012
ER
PT S
AU Marshall, RE
Stapleton, JK
AF Marshall, Robert E.
Stapleton, Janet K.
GP IEEE
TI Multi-wavelength Impacts on Coastal Radar Performance During a Sea
Breeze
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
AB Sea breeze circulations dramatically impact the detection performance of coastal radar and are forecast to increase in strength and frequency into the 21(st) century. Dry and warm air from the land flows offshore between 100 and 200 meters above sea level out to 100km offshore. This redistribution of water vapor and temperature creates strong vertical humidity and temperature gradients resulting in significant radar ducting. These thermodynamic gradients and resulting non-standard propagation structures vary in time and space as the sea breeze develops. Spatio-temporal radar skip zones develop within the ducts and reduced target detection ranges develop above the ducts. Notional S, C and X band radars are modeled with the Advanced Refractive Effects Prediction System and are located at the shoreline during a sea breeze. The azimuth and range dependent refractivity field is modeled by the Regional Atmospheric Mesoscale Prediction System.
C1 [Marshall, Robert E.; Stapleton, Janet K.] USN, Ctr Surface Warfare, Electromagnet & Sensor Syst Dept, Dahlgren, VA 22448 USA.
RP Marshall, RE (reprint author), USN, Ctr Surface Warfare, Electromagnet & Sensor Syst Dept, Dahlgren, VA 22448 USA.
EM Robert.e.marshall@navy.mil
NR 7
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 154
EP 157
PG 4
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800031
ER
PT S
AU Chen, VC
des Rosiers, A
Lipps, R
AF Chen, Victor C.
des Rosiers, Andre
Lipps, Ron
GP IEEE
TI BI-STATIC ISAR RANGE-DOPPLER IMAGING AND RESOLUTION ANALYSIS
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
ID RADAR; SIMULATION
AB Bi-static ISAR has many advantages compared to mono-static ISAR. In this paper, we describe the bi-static ISAR signal model, range resolution and Doppler resolution; discuss coherent processing of reflected signals at the receiver site to produce ISAR range-Doppler images of moving targets; and analyze bi-static Doppler and micro-Doppler features of target motions. We use simulated bi-static radar data to generate ISAR images of moving targets and extract bi-static micro-Doppler features.
C1 [Chen, Victor C.; des Rosiers, Andre; Lipps, Ron] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
RP Chen, VC (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 194
EP 198
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800040
ER
PT S
AU Raj, RG
Lipps, R
AF Raj, Raghu G.
Lipps, Ronald
GP IEEE
TI Image While Scan (IWS): An Adaptive Gabor Spectrum Estimation Approach
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
ID SHRINKAGE
AB We extend the classical ISAR imaging methodology by introducing a rotating transmit-receive antenna structure that allows us to simultaneously perform target imaging and surface surveillance operations. The inherent problem of processing only a limited number of pulses (per range-bin) is overcome by characterizing the received Doppler signals via a Kalmanized sparse Gabor representation that allows us to accurately capture the spectral information contained in the radar signals at different levels of resolution while also affording us the ability to adapt the representation based on the radar signals received in successive frames. We demonstrate the performance of our spectrum estimation methodology by testing it on real radar data, and comparing it with linear prediction (Burg's method) and sinusoidal Bayesian spectrum estimation algorithms. We find that our approach offers important advantages over previous approaches to Doppler spectrum estimation, while also potentially enabling the incorporation of wavelet thresholding strategies in order to suppress noise present in radar signals due to environmental and systemic factors.
C1 [Raj, Raghu G.; Lipps, Ronald] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
RP Raj, RG (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 482
EP 487
PG 6
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800098
ER
PT S
AU Abe, DK
Cantrell, B
Nguyen, KT
Pershing, DE
Wright, EL
Eisen, EL
Wood, FN
Myers, RE
Chernyavskiy, IA
Vlasov, AN
Levush, B
AF Abe, David K.
Cantrell, Ben
Nguyen, Khanh T.
Pershing, Dean E.
Wright, Edward L.
Eisen, Edward L.
Wood, Frank N.
Myers, Robert E.
Chernyavskiy, Igor A.
Vlasov, Alexander N.
Levush, Baruch
GP IEEE
TI Multiple-Beam Klystron Development at the Naval Research Laboratory
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
ID S-BAND; ELECTRON-GUN; HIGH-POWER; DESIGN; AMPLIFIERS; BANDWIDTH
AB Multiple-beam klystrons (MBKs) are a vacuum electronic amplifier technology that can provide the high power, low-noise, broadband, compact transmitter technology required to meet the needs of modern surveillance radar systems. We present a review of MBK development at the Naval Research Laboratory and the creation of an accurate, simulation-based MBK design methodology. Examples of specific devices include S-band amplifiers generating up to 670 kW peak power with bandwidths up to 13%. We also present examples of potential radar system applications using MBKs.
C1 [Abe, David K.; Levush, Baruch] USN, Res Lab, Washington, DC 20375 USA.
[Cantrell, Ben] SFA Inc, Crofton, MD USA.
[Eisen, Edward L.] CPI, Alto, CA USA.
[Wood, Frank N.] Mission Res Corp, ATK, Newington, VA USA.
[Chernyavskiy, Igor A.; Vlasov, Alexander N.] SAIC, Mclean, VA USA.
[Nguyen, Khanh T.; Pershing, Dean E.; Wright, Edward L.; Myers, Robert E.] Beam Wave Res Inc, Bethesda, MD USA.
RP Abe, DK (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM david.abe@nrl.navy.mil
FU Office of Naval Research
FX The authors would like to thank P. Borchard and J. J. Petillo for their
contributions to the work presented in this paper. The work was
supported by the Office of Naval Research.
NR 12
TC 0
Z9 0
U1 1
U2 6
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 491
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800100
ER
PT S
AU Paek, EG
Choe, JY
AF Paek, Eung-Gi
Choe, Joon Y.
GP IEEE
TI Over-The-Horizon Radars with Multipath-Enabled Super-Resolution Using
Time-Reversal
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
ID MEDIA
AB This paper describes an over-the-horizon radar with a high resolution imaging capability using time-reversal. By incorporating the extended virtual aperture concept enabled by multipath interference into a double-pass conjugate image scanning scheme, high resolution radar imaging can be achieved without requiring extensive computation or apriori knowledge of environmental conditions. Initial theoretical and experimental results to prove the concept are provided.
C1 [Paek, Eung-Gi; Choe, Joon Y.] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
RP Paek, EG (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
EM paek@nrl.navy.mil
NR 19
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 580
EP 585
PG 6
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800117
ER
PT S
AU Blunt, S
Cook, M
Perrins, E
de Graaf, J
AF Blunt, Shannon
Cook, Matthew
Perrins, Erik
de Graaf, Jean
GP IEEE
TI CPM-Based Radar Waveforms for Efficiently Bandlimiting a Transmitted
Spectrum
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
AB In this paper we shall demonstrate how a polyphase-coded radar waveform can be implemented using a continuous phase modulation (CPM) framework so as to achieve spectral containment while maintaining a constant envelope to maximize energy-on-target. Current modulation techniques such as derivative phase shift keying (DPSK) and minimum shift keying (MSK), which are applicable to binary-coded waveforms, are well-known implementation schemes for spectral containment. The CPM implementation is applicable to polyphase codes and can also achieve better spectral containment, though a by-product is increased range sidelobes that result due to the deviation from the idealized code (implicitly defined for squared-shaped chips). To ameliorate the increased range sidelobes, a version of Least-Squares mismatched filtering is employed that accommodates the continuous nature of the CPM structure. Also, continuous rise/fall-time transitions of the pulse are addressed as part of the holistic implementation of the CPM-based waveform. It is observed that for the CPM implementation the rise/fall-time becomes the limiting factor on spectral containment and a rather simple scheme based on Chireaux out-phasing is suggested as a means to "slow down" the pulse rise/fall.
C1 [Blunt, Shannon; Cook, Matthew; Perrins, Erik] Univ Kansas, Dept Elect Engn & Comp Sci, Lawrence, KS 66045 USA.
[de Graaf, Jean] US Navy, Res Lab, Div Radar, Washington, DC USA.
RP Blunt, S (reprint author), Univ Kansas, Dept Elect Engn & Comp Sci, Lawrence, KS 66045 USA.
FU Office of Naval Research [ONR 31]
FX This work was supported by the Office of Naval Research (ONR 31).
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 704
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800143
ER
PT S
AU Higgins, T
Blunt, SD
Gerlach, K
AF Higgins, Thomas
Blunt, Shannon D.
Gerlach, Karl
GP IEEE
TI Gain-Constrained Adaptive Pulse Compression via an MVDR Framework
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
AB Much work has been done to discover pulse compression methods that alleviate the effects of range sidelobes, though pulse compression filters that deviate from the matched filter suffer from varying degrees of mismatch loss. The Minimum Mean-Square Error (MMSE) based Adaptive Pulse Compression (APC) algorithm is capable of suppressing range sidelobes into the noise by employing a unique pulse compression filter for each range cell. Recently, Fast APC (FAPC) has been developed to reduce the computational cost of APC while maintaining much of the sidelobe suppression capability. This paper utilizes the MVDR framework to facilitate inclusion of a unity gain constraint within the APC and FAPC cost functions in an effort to mitigate mismatch loss. The APC algorithm exhibits almost no mismatch loss and, as such, the full-dimension algorithm benefits little from the gain constraint. However, FAPC occasionally suppresses small targets in dense scattering environments due to fewer degrees of freedom inherent to reduced-dimensionality processing. The constrained FAPC algorithm preserves gain on small targets consequently improving detection performance.
C1 [Higgins, Thomas; Blunt, Shannon D.] Univ Kansas, Dept EECS, Radar Syst Lab, Lawrence, KS 66045 USA.
[Higgins, Thomas; Gerlach, Karl] Naval Res Lab, Div Radar, Washington, DC 20375 USA.
RP Higgins, T (reprint author), Univ Kansas, Dept EECS, Radar Syst Lab, Lawrence, KS 66045 USA.
FU Office of Naval Research (ONR 31); Radar Division of the Naval Research
Laboratory
FX This work was sponsored by the Office of Naval Research (ONR 31) and the
Radar Division of the Naval Research Laboratory.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 710
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800144
ER
PT S
AU Cheney, M
Wang, L
Borden, B
AF Cheney, Margaret
Wang, Ling
Borden, Brett
GP IEEE
TI Spatial, Temporal, and Spectral Aspects of Radar Data
SO 2009 IEEE RADAR CONFERENCE, VOLS 1 AND 2
SE IEEE Radar Conference
LA English
DT Proceedings Paper
CT 2009 IEEE Radar Conference
CY MAY 04-08, 2009
CL Pasadena, CA
SP IEEE, IEEE Coastal, Los Angeles Sect, JPL, GRSS, MTT S, aess
ID SYNTHETIC-APERTURE INVERSION; TOMOGRAPHY
AB We develop a linearized imaging theory that combines the spatial, temporal, and spectral aspects of scattered waves. We consider the case of fixed, distributed transmitters and receivers, and a general distribution of objects, each undergoing linear motion; thus the theory deals with imaging distributions in phase space. We derive a model for the data that is appropriate for any set of waveforms, and show how it specializes to familiar results when the targets are far from the antennas and when narrowband waveforms are used.
We use a phase-space imaging formula that can be interpreted in terms of filtered backprojection or matched filtering. For this imaging approach, we derive the corresponding point-spread function. We plot examples of this point-spread function for three different geometrical placements of the transmitters and receivers.
Special cases of the theory reduce to: a) Range-Doppler imaging, b) Inverse Synthetic Aperture Radar (ISAR) and Spotlight Synthetic Aperture Radar (SAR), c) Diffraction Tomography or Ultra-Narrowband Tomography, and d) Tomography of Moving Targets.
C1 [Cheney, Margaret; Wang, Ling] Rensselaer Polytech Inst, Troy, NY 12180 USA.
[Wang, Ling] Nanjing Univ Aeronaut & Astronaut, Nanjing 210016, Peoples R China.
[Borden, Brett] US Navy, Postgrad Sch, Monterey, CA 93943 USA.
RP Cheney, M (reprint author), Rensselaer Polytech Inst, Troy, NY 12180 USA.
FU Office of Naval Research; Air Force Office of Scientific Research
[FA9550-06-1-0017]; Rensselaer Polytechnic Institute; National Research
Council
FX This work was supported by the Office of Naval Research, by the Air
Force Office of Scientific Research1 under agreement number
FA9550-06-1-0017, by Rensselaer Polytechnic Institute, and by the
National Research Council.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1097-5764
BN 978-1-4244-2870-0
J9 IEEE RAD CONF
PY 2009
BP 716
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BKN77
UT WOS:000268721800145
ER
PT B
AU Cascio, J
Karpenko, M
Gong, Q
Sekhavat, P
Ross, IM
AF Cascio, J.
Karpenko, M.
Gong, Q.
Sekhavat, P.
Ross, I. M.
GP IEEE
TI Smooth Proximity Computation for Collision-Free Optimal Control of
Multiple Robotic Manipulators
SO 2009 IEEE-RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS
LA English
DT Proceedings Paper
CT IEEE RSJ International Conference on Intelligent Robots and Systems
CY OCT 10-15, 2009
CL St Louis, MO
SP IEEE Robot & Automat Soc (RA), Robot Soc Japan (RSJ), Soc Instruments & Control Engn, IEEE Ind Elect Soc, Inst Control, Robot & Syst Korea, ABB, Barrett Technol, Inc, Willow Garage, ROBOTIS, Aldebaran Robot
ID DISTANCE
AB This paper presents a novel approach for trajectory planning of multiple robot manipulators operating amongst obstacles. Karush-Kuhn-Tucker (KKT) conditions are exploited to compute the proximity between line-swept sphere (LSS) bounding volumes used to model potentially colliding objects. The KKT multipliers and the parameters giving the minimum distance between LSS volumes are augmented into the manipulator trajectory planning problem as dummy control variables. These extra variables allow the planning problem to be cast as a standard nonlinear optimal control problem with smooth path constraints, which is then solved using the pseudospectral method. The utility of the approach is demonstrated by a trajectory planning example involving stationary workspace obstacles and for a centralized multi-robot system in which each robot acts as a dynamic obstacle that the other should avoid. The optimal control formulation incorporates practical constraints on the manipulator joint angles, velocities and accelerations as well as limits on the control torque. The computed collision-free optimal trajectories are executed on a pair of experimental robots to verify the feasibility of the numerical results.
C1 [Cascio, J.; Karpenko, M.; Sekhavat, P.; Ross, I. M.] USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
[Gong, Q.] Univ Calif Santa Cruz, Dept Appl Math & Stat, Santa Cruz, CA 95064 USA.
RP Cascio, J (reprint author), USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
FU Natural Sciences and Engineering Research Council (NSERC) of Canada
FX This work was supported, in part, by the Natural Sciences and
Engineering Research Council (NSERC) of Canada.
NR 22
TC 2
Z9 2
U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3803-7
PY 2009
BP 2452
EP 2457
DI 10.1109/IROS.2009.5354382
PG 6
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic; Robotics
SC Computer Science; Engineering; Robotics
GA BSQ11
UT WOS:000285372901092
ER
PT B
AU Lintz, WA
McEachen, JC
Jenn, DC
AF Lintz, William A.
McEachen, John C.
Jenn, David C.
GP IEEE
TI Sensor Network Pair-wise Wireless Communications Performance with
Unsteady Node Orientation
SO 2009 IEEE SARNOFF SYMPOSIUM, CONFERENCE PROCEEDINGS
SE IEEE Sarnoff Symposium
LA English
DT Proceedings Paper
CT IEEE Sarnoff Symposium
CY MAR 30-APR 01, 2009
CL Princeton, NJ
SP IEEE, MTT S, Electron Devices Soc, Princeton Univ, IEEE Commun Soc, IEEE LEOS, APS
AB A model is proposed to describe expected communications performance between two sensor network nodes where both are unsteady in physical orientation with respect to a specified reference. Model application enables determination of transmit power in terms of a preferred link performance probability. Increasing applications of wireless sensor networks has proportionally increased fielding ideas and platforms. The stability of a platform for a sensor network node cannot always be assumed stable due to physical variation from motion or surface conditions. This creates a time-varying random orientation between nodes in communication with an adjacent partner. A stochastic model is proposed connecting the physical random orientation of a pair of elements to their transmission components. The resulting performance of a link using the proposed model is then applied to achieve reliable communications performance. Analysis demonstrates improved use of network power compared to a method which assigns a blanket power margin across the network.
C1 [Lintz, William A.; McEachen, John C.; Jenn, David C.] USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
RP Lintz, WA (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, 1 Univ Circle, Monterey, CA 93943 USA.
EM walintz@nps.edu; mceachen@nps.edu; jenn@nps.edu
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-3381-0
J9 IEEE SARNOFF SYMPOS
PY 2009
BP 574
EP 578
PG 5
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BLS48
UT WOS:000270940400110
ER
PT B
AU Tam, J
Martell, CH
AF Tam, Jenny
Martell, Craig H.
GP IEEE
TI Age Detection in Chat
SO 2009 IEEE THIRD INTERNATIONAL CONFERENCE ON SEMANTIC COMPUTING (ICSC
2009)
LA English
DT Proceedings Paper
CT 3rd International Conference on Semantic Computing (ICSC 2009)
CY SEP 14-16, 2009
CL Berkeley, CA
SP IEEE
DE online chat; age classification; Support Vector Machine; Naive Bayesian
Classifier; stop words
AB This paper presents the results of using statistical analysis and automatic text categorization to identify an author's age group based on the author's online chat posts. A Naive Bayesian Classifier and Support Vector Machine (SVM) model were used. The SVM model experiments generated an f-score measurement of 0.996 on test data distinguishing teens from adults. We also introduce an alternative method for generating "stop words" that chooses n-grams based on their relative distribution across the classes.
C1 [Tam, Jenny; Martell, Craig H.] USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
RP Tam, J (reprint author), USN, Postgrad Sch, Dept Comp Sci, 1411 Cunningham Rd, Monterey, CA 93943 USA.
EM jktam@nps.edu; cmartell@nps.edu
NR 14
TC 2
Z9 2
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-4962-0
PY 2009
BP 33
EP 39
DI 10.1109/ICSC.2009.37
PG 7
WC Computer Science, Artificial Intelligence; Computer Science, Information
Systems
SC Computer Science
GA BOK85
UT WOS:000276911400005
ER
PT B
AU Anderson, CR
Volos, HI
Headley, WC
Buehrer, RM
Muller, FCBF
AF Anderson, Christopher R.
Volos, Haris I.
Headley, W. Chris
Buehrer, R. Michael
Mueller, Francisco C. B. F.
GP IEEE
TI Low-Antenna Ultra Wideband Spatial Correlation Analysis in a Forest
Environment
SO 2009 IEEE VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5
SE IEEE Vehicular Technology Conference VTC
LA English
DT Proceedings Paper
CT 69th IEEE Vehicular Technology Conference
CY APR 26-29, 2009
CL Barcelona, SPAIN
SP IEEE
DE Ultra Wideband (UWB); Spatial Correlation; Forest; Multiple-Input
Multiple-Output (MIMO); Antenna Arrays
ID PROPAGATION; CHANNELS
AB Impulse ultra wideband (UWB) communications promises a number of potential benefits for use in wireless sensor networks-particularly in forest environments where it can provide robust operation along with the ability to combine communications with precision position location. Additionally, MIMO communications for UWB provides the ability to take advantage of the rich multipath diversity inherent to UWB communications in order to provide enhanced robustness to fading as well as improved coverage in non line-of-sight scenarios.
In this paper, we present a detailed analysis of the spatial correlation of UWB signals in a forest environment. Propagation measurements were performed using a 620 picosecond duration UWB pulse in four different forest environments: light brush, light, medium, and dense forest at distances of up to 50 meters. The mean spatial correlation was observed to vary based on forest environment, antenna type, antenna array orientation, and transmitter-receiver separation distance. These measurement results should aid in the development of MIMO algorithms for UWB outdoor communications.
C1 [Anderson, Christopher R.] USN Acad, Wireless & Electromagnet Lab, Annapolis, MD 21402 USA.
[Volos, Haris I.; Headley, W. Chris; Buehrer, R. Michael] Virginia Tech, Mobile & Portable Radio Res Grp, Blacksburg, VA 24061 USA.
[Mueller, Francisco C. B. F.] Fed Univ Para, Belem, Para, Brazil.
RP Anderson, CR (reprint author), USN Acad, Wireless & Electromagnet Lab, Annapolis, MD 21402 USA.
EM canderso@usna.edu; hvolos@vt.edu; cheadley@vt.edu; buehrer@vt.edu;
fmuller@ufpa.br
FU National Science Foundation (NSF) [0520418]
FX Supported by the National Science Foundation (NSF) under grant 0520418.
Furthermore, the authors would like to thank Tektronix for providing the
arbitrary waveform generator as well as the high-speed oscilloscope used
to perform the propagation measurements. C. L. Hutchens, B. R. Sarbin,
A. C. Bowers, and J. D. G. McKillican all provided significant help
collecting the data. Francisco Muller would like to thank the support
and funding provided by the Brazilian government agency Capes.
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2516-7
J9 VEH TECHNOL CONFE
PY 2009
BP 169
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications; Transportation
Science & Technology
SC Engineering; Telecommunications; Transportation
GA BMO81
UT WOS:000273169200034
ER
PT B
AU Volos, HI
Buehrer, RM
Anderson, CR
AF Volos, Haris I.
Buehrer, R. Michael
Anderson, Christopher R.
GP IEEE
TI A practical link budget for I-UWB systems
SO 2009 IEEE VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5
SE IEEE Vehicular Technology Conference VTC
LA English
DT Proceedings Paper
CT 69th IEEE Vehicular Technology Conference
CY APR 26-29, 2009
CL Barcelona, SPAIN
SP IEEE
DE UWB; Friis; link budget
ID RADIO
AB This paper proposes a practical alternative to the traditional link budget approach for impulse-based UWB systems (I-UWB), which is based on the Friis formula. The proposed link budget approach overcomes the narrowband limitations of the traditional link budget by proposing the use of an antenna-pulse coupling gain. This gain is specific for an antenna tx-rx pair and the I-UWB pulse used and can be easily determined by taking a frequency or a time domain measurement. The paper introduces the approach and then verifies its accuracy by presenting the results of several measurements at distances ranging from 1 to 20 m.
C1 [Volos, Haris I.; Buehrer, R. Michael] Virginia Tech, Wireless Virginia Tech, Mobile & Portable Radio Res Grp, Blacksburg, VA 24061 USA.
[Anderson, Christopher R.] US Naval Acad, Wireless & Electromagnet Lab, Annapolis, MD 21402 USA.
RP Volos, HI (reprint author), Virginia Tech, Wireless Virginia Tech, Mobile & Portable Radio Res Grp, Blacksburg, VA 24061 USA.
EM hvolos@vt.edu; buehrer@vt.edu; canderso@usna.edu
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2516-7
J9 VEH TECHNOL CONFE
PY 2009
BP 230
EP +
PG 2
WC Engineering, Electrical & Electronic; Telecommunications; Transportation
Science & Technology
SC Engineering; Telecommunications; Transportation
GA BMO81
UT WOS:000273169200046
ER
PT S
AU Lintz, WA
McEachen, JC
Tummala, M
AF Lintz, William A.
McEachen, John C.
Tummala, Murali
GP IEEE
TI A Method for Determining Weight Reset Timing in a Wirelessly Networked
Array with Independently Mobile Elements
SO 2009 INTERNATIONAL CONFERENCE ON ADVANCED INFORMATION NETWORKING AND
APPLICATIONS
SE International Conference on Advanced Information Networking and
Applications
LA English
DT Proceedings Paper
CT 23rd International Conference on Advanced Information Networking and
Applications Workshops
CY MAY 26-29, 2009
CL Bradford, ENGLAND
SP IEEE
DE Wireless Sensor Network; Beamforming; Mobile Elements
AB A method is proposed to determine reset timing for phase weight recalculation required in coherent beamforming using wirelessly connected independently mobile nodes to form an array aperture. Without the tether of a wired connection, elements in an array may be independently mobile. However, coherent beam formation requires position data at time of intercept to maintain target focus. Implementing a stochastic relationship between random element motion and array gain, position updates for weight reset can be delayed while still meeting requirements for array gain performance. Determination of the timing required between phase weight reset is vital to this process. A new algorithm is proposed to make this determination using probability of signal detection under the Neyman-Pearson criterion as a key indicator. The result is a method that efficiently balances operational array requirements and node energy usage. A comparison of energy usage versus alternate methods demonstrates the achieved performance.
C1 [Lintz, William A.; McEachen, John C.; Tummala, Murali] USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
RP Lintz, WA (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, 1 Univ Circle, Monterey, CA 93943 USA.
EM walintz@nps.edu; mceachen@nps.edu; mtummala@nps.edu
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-445X
BN 978-1-4244-4000-9
J9 INT CON ADV INFO NET
PY 2009
BP 914
EP 920
DI 10.1109/AINA.2009.34
PG 7
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BMF30
UT WOS:000272088000123
ER
PT B
AU Xiao, Y
Zhang, YP
Gibson, JH
Xie, GG
AF Xiao, Yang
Zhang, Yanping
Gibson, John H.
Xie, Geoffrey G.
GP IEEE COMPUTER SOC
TI Performance Analysis of p-persistent Aloha for Multi-hop Underwater
Acoustic Sensor Networks
SO 2009 INTERNATIONAL CONFERENCE ON EMBEDDED SOFTWARE AND SYSTEMS,
PROCEEDINGS
LA English
DT Proceedings Paper
CT 6th International Conference on Embedded Software and Systems
CY MAY 25-27, 2009
CL Hangzhou, PEOPLES R CHINA
SP IEEE TCSC, IEEE Comp Soc, IEEE, Zhejiang Univ, Zhejiang Nat Sci Fdn, St Francis Xavier Univ
DE Aloha; underwater; acoustic; sensor networks
AB Media Access Control (MAC) must be carefully considered in multi-hop Underwater Acoustic Sensor Networks (UASNs) due to limited bandwidth and large propagation delay. In particular, variable propagation delays in UASNs cause inaccurate time synchronization and therefore make reservation-based protocols less favorable. Large propagation delays limit the performance of carrier sense in predicting the status of the intended recipients, and therefore CSMA protocols show bad performance in UASNs too. Therefore, simple protocols, such as Aloha, show promise for UASNs. In this paper we consider the performance of a multi-hop p-persistent ALOHA protocol.
C1 [Xiao, Yang; Zhang, Yanping] Univ Alabama, Dept Comp Sci, Tuscaloosa, AL 35487 USA.
[Gibson, John H.; Xie, Geoffrey G.] Naval Postgrad Sch, Dept Comp Sci, Monterey, CA USA.
RP Xiao, Y (reprint author), Univ Alabama, Dept Comp Sci, Tuscaloosa, AL 35487 USA.
EM yangxiao@ieee.org; yzhang@cs.ua.edu; jhgibson@nps.edu; xie@nps.edu
FU US National Science Foundation (NSF) [CCF-0829827, CNS-0716211,
CNS-0737325]
FX This work is supported in part by the US National Science Foundation
(NSF) under the grant numbers CCF-0829827, CNS-0716211, and CNS-0737325.
NR 11
TC 2
Z9 2
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
BN 978-0-7695-3678-1
PY 2009
BP 305
EP +
DI 10.1109/ICESS.2009.61
PG 2
WC Computer Science, Information Systems; Computer Science, Software
Engineering
SC Computer Science
GA BMD73
UT WOS:000271940700039
ER
PT S
AU Pezoa, JE
Dhakal, S
Hayat, MM
AF Pezoa, Jorge E.
Dhakal, Sagar
Hayat, Majeed M.
BE Barolli, L
Feng, WC
TI Decentralized Load Balancing for Improving Reliability in Heterogeneous
Distributed Systems
SO 2009 INTERNATIONAL CONFERENCE ON PARALLEL PROCESSING WORKSHOPS (ICPPW
2009)
SE International Conference on Parallel Processing Workshops
LA English
DT Proceedings Paper
CT 38th International Conference on Parallel Processing
CY SEP 22-25, 2009
CL Vienna, AUSTRIA
DE renewal theory; queuing theory; reliability; distributed computing; load
balancing
ID STRUCTURED GRID SERVICES; TASK ALLOCATION; PERFORMANCE; ALGORITHM
AB A probabilistic analytical framework for decentralized load balancing (LB) strategies for heterogeneous distributed-computing systems (DCSs) is presented with the overall goal of maximizing the service reliability in the presence of random failures. The service reliability of a DCS is defined as the probability of successfully serving a specified workload before all the computing nodes fail permanently. In the framework considered the service and failure times of nodes are random, the communication times in the network are both tangible and stochastic, and LB is performed synchronously by all the nodes during the runtime of each submitted workload. By taking a novel regenerative stochastic-analysis approach, the service reliability of a two-node DCS is characterized analytically. This formulation, in turn, is used to form and solve an optimization problem, yielding LB policies with maximal reliability. A scalable extension of the two-node formulation to an arbitrary size system is also presented. The validity of the proposed theory is studied using both Monte-Carlo simulations and real experiments on a small-scale testbed.
C1 [Pezoa, Jorge E.; Hayat, Majeed M.] Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA.
[Dhakal, Sagar] Naval Res Lab, Washington, DC USA.
[Hayat, Majeed M.] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM USA.
RP Pezoa, JE (reprint author), Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA.
EM jpezoa@ece.unm.edu; sagar.dhakal@gmail.com; hayat@ece.unm.edu
FU Defense Threat Reduction Agency (Combating WMD Basic Research Program).
FX This work was supported by the Defense Threat Reduction Agency
(Combating WMD Basic Research Program).
NR 10
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1530-2016
BN 978-1-4244-4923-1
J9 INT CONF PARA PROC
PY 2009
BP 214
EP +
DI 10.1109/ICPPW.2009.50
PG 2
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BUO22
UT WOS:000289915300030
ER
PT S
AU Ancona, MG
Boos, JB
Bennett, BR
AF Ancona, M. G.
Boos, J. B.
Bennett, B. R.
GP IEEE
TI Using Density-Gradient Theory to Model Sb-Based p-Channel FETs
SO 2009 INTERNATIONAL CONFERENCE ON SIMULATION OF SEMICONDUCTOR PROCESSES
AND DEVICES
SE International Conference on Simulation of Semiconductor Processes and
Devices
LA English
DT Proceedings Paper
CT International Conference on Simulation of Semiconductor Processes and
Devices
CY SEP 09-11, 2009
CL San Diego, CA
DE hole transport; antimonides; device scaling; density-gradient theory
AB Density-gradient theory is discussed as a tool for modeling Sb-based p-channel FETs. The theory's methods and approximations are reviewed with emphasis given to the phenomenological treatment of the quantum confinement. The theory is then illustrated by using it to analyze FETs having InSb, GaSb and InGaSb channels, and to project their scaling characteristics.
C1 [Ancona, M. G.; Boos, J. B.; Bennett, B. R.] USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
RP Ancona, MG (reprint author), USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
EM ancona@estd.nrl.navy.mil
RI Bennett, Brian/A-8850-2008
OI Bennett, Brian/0000-0002-2437-4213
NR 10
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1946-1569
BN 978-1-4244-3948-5
J9 INT CONF SIM SEMI PR
PY 2009
BP 75
EP 78
PG 4
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BON92
UT WOS:000277103100018
ER
PT S
AU Hanssen, JL
Ekstrom, CR
Walls, WF
AF Hanssen, J. L.
Ekstrom, Christopher R.
Walls, Warren F.
GP IEEE
TI High Performance Oscillator Evaluation
SO 2009 JOINT MEETING OF THE EUROPEAN FREQUENCY AND TIME FORUM AND THE IEEE
INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM, VOLS 1 AND 2
SE IEEE International Frequency Control Symposium
LA English
DT Proceedings Paper
CT Joint Meeting of the 23rd European Frequency and Time Forum/IEEE
International Frequency Control Symposium
CY APR 20-24, 2009
CL Besancon, FRANCE
SP Conseil Reg Franche Comte, Ville Besancon, NIST, IEEE, UFFC Soc, Jet Propuls Lab, Symmetricom, OEwaves, Vectron, Conseil Gen Doubs, Communaute Agglomerat Grand Besancon, Univ Franche Comte, Minist Rech & Enseignement Superieur, Soc Francaise Microtech & Chronometrie, Frequency Elect
AB We report on the results of experiments to characterizing the performance of high quality crystal oscillators. The sensitivity of the crystals to temperature and humidity were investigated. This information was used to design hermetically sealed vessels to stabilize both temperature and humidity in an effort to improve the long term frequency stability of the crystals. Preliminary data from these tests are presented.
C1 [Hanssen, J. L.; Ekstrom, Christopher R.; Walls, Warren F.] USN Observ, Time Serv Dept, Washington, DC 20392 USA.
RP Hanssen, JL (reprint author), USN Observ, Time Serv Dept, Washington, DC 20392 USA.
EM james.hanssen@usno.navy.mil
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1075-6787
BN 978-1-4244-3511-1
J9 P IEEE INT FREQ CONT
PY 2009
BP 181
EP 184
DI 10.1109/FREQ.2009.5168165
PG 4
WC Engineering, Electrical & Electronic; Physics, Applied;
Telecommunications
SC Engineering; Physics; Telecommunications
GA BNK79
UT WOS:000274814900035
ER
PT S
AU Matsakis, D
AF Matsakis, Demetrios
GP IEEE
TI TIME AND FREQUENCY ACTIVITIES AT THE US NAVAL OBSERVATORY
SO 2009 JOINT MEETING OF THE EUROPEAN FREQUENCY AND TIME FORUM AND THE IEEE
INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM, VOLS 1 AND 2
SE IEEE International Frequency Control Symposium
LA English
DT Proceedings Paper
CT Joint Meeting of the 23rd European Frequency and Time Forum/IEEE
International Frequency Control Symposium
CY APR 20-24, 2009
CL Besancon, FRANCE
SP Conseil Reg Franche Comte, Ville Besancon, NIST, IEEE, UFFC Soc, Jet Propuls Lab, Symmetricom, OEwaves, Vectron, Conseil Gen Doubs, Communaute Agglomerat Grand Besancon, Univ Franche Comte, Minist Rech & Enseignement Superieur, Soc Francaise Microtech & Chronometrie, Frequency Elect
AB The U.S. Naval Observatory (USNO) has provided timing for the Navy since 1830 and, in cooperation with other institutions, has also provided timing for the United States and the international community. Its Master Clock (MC) is the source of UTC (USNO), USNO's realization of Coordinated Universal Time (UTC), which has staved within 5 ns rms of UTC since 1999 and within 3.1 ns rms in 2008. The data used to generate UTC (USNO) are based upon 70 cesium and 24 hydrogen maser frequency standards in four buildings at two sites. USNO disseminates time via voice, telephone modem, LORAN, Network Time Protocol (NTP), GPS, and Two-Way Satellite Time Transfer (TWSTT). This paper describes some of the changes being made to meet the future needs for precision, accuracy, and robustness. Further details and explanations of our services can be found online at http://tycho.usno.navy.mil, which will shortly be transformed to http://www.usno.navy.mil.
C1 USN Observ, Time Serv Dept, Washington, DC 20392 USA.
RP Matsakis, D (reprint author), USN Observ, Time Serv Dept, Washington, DC 20392 USA.
NR 37
TC 2
Z9 2
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1075-6787
BN 978-1-4244-3511-1
J9 P IEEE INT FREQ CONT
PY 2009
BP 653
EP 658
DI 10.1109/FREQ.2009.5168264
PG 6
WC Engineering, Electrical & Electronic; Physics, Applied;
Telecommunications
SC Engineering; Physics; Telecommunications
GA BNK79
UT WOS:000274814900134
ER
PT B
AU Weatherford, T
Wang, Y
Tracey, S
AF Weatherford, T.
Wang, Y.
Tracey, S.
GP JEDEC
TI Self Heating of AlGaN/GaN HEMTs in Pulsed Operation
SO 2009 ROCS WORKSHOP, PROCEEDINGS
LA English
DT Proceedings Paper
CT Workshop on Reliability of Compound Semiconductors
CY OCT 11, 2009
CL Greensboro, NC
AB The purpose of this work was to develop a TCAD device model to study the electrical and thermal characteristics of the AlGaN/GaN HEMT in the time domain in contrast to a DC thermal equilibrium analysis. We first examined a channel temperature technique Method 3104 of MIL-STD 750D to determine the corresponding location in the HEMT structure that the gate voltage measurement predicts the temperature. Second, we investigated the performance of single and multiple pulses effects on heating of the HEMT. Third, we studied and compared the heating between the DC analysis and a RF transient (multiple pulses) analysis with the same average device power. Finally, we observe large temperature gradients in the device in initial device heating not capable of being observed in a DC TCAD device analysis.
C1 [Weatherford, T.; Wang, Y.; Tracey, S.] USN, Postgrad Sch, Code EC WT, Monterey, CA 93943 USA.
RP Weatherford, T (reprint author), USN, Postgrad Sch, Code EC WT, Monterey, CA 93943 USA.
EM trweathe@nps.edu
NR 4
TC 0
Z9 0
U1 0
U2 0
PU JEDEC
PI ARLINGTON
PA 2500 WILSON BLVD, ARLINGTON, VA 22201 USA
BN 978-0-7908-0124-7
PY 2009
BP 59
EP 69
PG 11
WC Engineering, Electrical & Electronic
SC Engineering
GA BEZ15
UT WOS:000318819900008
ER
PT B
AU Mittereder, JA
Cronk, NS
Binari, SC
Via, GD
Fanning, D
Tserng, H
Saunier, P
Decker, K
Beam, E
AF Mittereder, J. A.
Cronk, N. S.
Binari, S. C.
Via, G. D.
Fanning, D.
Tserng, H.
Saunier, P.
Decker, K.
Beam, E.
GP JEDEC
TI RF Arrhenius Life Testing of X-band High Voltage GaAs PHEMTs
SO 2009 ROCS WORKSHOP, PROCEEDINGS
LA English
DT Proceedings Paper
CT Workshop on Reliability of Compound Semiconductors
CY OCT 11, 2009
CL Greensboro, NC
C1 [Mittereder, J. A.; Binari, S. C.] USN, Res Lab, Washington, DC 20375 USA.
[Via, G. D.] Air Force Res Lab, WrightPatterson, OH 45433 USA.
[Cronk, N. S.] Global Strategies Grp, Crofton, MD 21114 USA.
[Fanning, D.; Tserng, H.; Saunier, P.; Decker, K.; Beam, E.] TriQuint Semicond, Richardson, TX 75080 USA.
RP Mittereder, JA (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM mittereder@nrl.navy.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU JEDEC
PI ARLINGTON
PA 2500 WILSON BLVD, ARLINGTON, VA 22201 USA
BN 978-0-7908-0124-7
PY 2009
BP 103
EP +
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BEZ15
UT WOS:000318819900012
ER
PT B
AU Alves, FDP
Santos, RAT
Nohra, LFM
Magalhaes, LB
Karunasiri, G
AF Alves, Fabio D. P.
Santos, Ricardo A. T.
Nohra, Luis F. M.
Magalhaes, Luciano B.
Karunasiri, Gamani
GP IEEE
TI Tunable NIR Quantum Well Infrared Photodetector Using Interband
Transitions
SO 2009 SBMO/IEEE MTT-S INTERNATIONAL MICROWAVE AND OPTOELECTRONICS
CONFERENCE (IMOC 2009)
LA English
DT Proceedings Paper
CT SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference
CY NOV 03-06, 2009
CL Belem, BRAZIL
SP SBMO, IEEE MTT S
DE quantum-well; interband transition; phtodetection; near-infrared
AB This paper presents the design and characterization of a near infrared (NIR) tunable quantum well infrared photodetector (QWIP). The detection was achieved using interband electron transitions between quantized energy levels for holes (light and heavy) in the valence band and quantized energy levels for electrons in the conduction band. The quantum wells are made asymmetric (step wells) to allow transitions between energy levels with different parity quantum numbers. The structure is modeled by solving self-consistently the Schrodinger and Poisson equations with the help of the shooting method. The photocurrent of the fabricated GaAs/InGaAs photodetector is measured at the temperature of 10 K and the observed response lies between 825 and 940 nm. When the bias is 0.5 V, a narrow response centered in 840 nm is achieved. Applying 4.5 V the peak response moves to 930 nm. The results demonstrate the possibility of tunable detection in the NIR band with great versatility.
C1 [Alves, Fabio D. P.; Santos, Ricardo A. T.; Nohra, Luis F. M.; Magalhaes, Luciano B.] Inst Tecnol Aeronaut, Sao Jose Dos Campos, Brazil.
Naval Postgrad Sch, Monterey, CA 93943 USA.
RP Alves, FDP (reprint author), Inst Tecnol Aeronaut, Sao Jose Dos Campos, Brazil.
EM durante@ita.br
NR 7
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-5356-6
PY 2009
BP 298
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BQX72
UT WOS:000282068200065
ER
PT S
AU Rolison, DR
Pietron, JJ
Long, JW
AF Rolison, Debra R.
Pietron, Jeremy J.
Long, Jeffrey W.
BE Li, J
Vanysek, P
Brown, R
BrucknerLea, C
Hatchet, D
Josowicz, M
TI Controlling the Sensitivity, Specificity, and Time Signature of Sensors
through Architectural Design on the Nanoscale
SO 35 YEARS OF CHEMICAL SENSORS - AN HONORARY SYMPOSIUM FOR PROFESSOR JIRI
JANATA'S 70TH BIRTHDAY CELEBRATION
SE ECS Transactions
LA English
DT Proceedings Paper
CT 1st International Symposium on Emerging Materials for Post-CMOS
Applications held at the 215th Meeting of the Electrochemical-Society
CY MAY 25-29, 2009
CL San Francisco, CA
SP Electrochem Soc
ID SILICA NANOARCHITECTURES; AEROGELS; SUPERSTRUCTURES; ULTRATHIN; OXYGEN;
GAS
AB When multi functionality and molecular transport paths are critical, as they are in chemical sensing, architectural design enables high performance. The chemical interactions that trigger recognition (i.e., sensing) of molecules are more effective when they originate within mesoporous architectures with continuous but aperiodic networks that wrap around the reactive solid network in 3-D.
C1 [Rolison, Debra R.; Pietron, Jeremy J.; Long, Jeffrey W.] USN, Res Lab, Surface Chem Branch, Washington, DC 20375 USA.
RP Rolison, DR (reprint author), USN, Res Lab, Surface Chem Branch, Code 6170,4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 32
TC 3
Z9 3
U1 0
U2 2
PU ELECTROCHEMICAL SOCIETY INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-56677-714-8
J9 ECS TRANSACTIONS
PY 2009
VL 19
IS 6
BP 171
EP 179
DI 10.1149/1.3118550
PG 9
WC Chemistry, Analytical; Electrochemistry
SC Chemistry; Electrochemistry
GA BMJ68
UT WOS:000272592400019
ER
PT S
AU Hull, AJ
Cray, BA
AF Hull, Andrew J.
Cray, Benjamin A.
BE DulieuBarton, JM
TI Measurement of the shear wave speed in a submerged plate
SO 7TH INTERNATIONAL CONFERENCE ON MODERN PRACTICE IN STRESS AND VIBRATION
ANALYSIS
SE Journal of Physics Conference Series
LA English
DT Proceedings Paper
CT 7th International Conference on Modern Practice in Stress and Vibration
Analysis
CY SEP 08-10, 2009
CL Murray Edwards Coll, Cambridge, ENGLAND
SP Inst Phys Appl Mech Grp, AWE, Flir Infra-red, Instron, LaVision, Limess, Veqter, Vishay, Assoc Francaise Mech, British Soc Strain Measurement, Engn Integr Soc, European Soc Expt Mech, Emerald, Forum Appl Mech, Inst Mech Engineers, Japanese Soc Expt Mech, NAFEMS, Soc Expt Mech
HO Murray Edwards Coll
ID ACOUSTIC PANEL TESTS; MODULI
AB This paper develops an inverse method to estimate, in water, the shear wave speed in an isotropic, thick, elastomeric plate. The submerged plate is mechanically shaken and a scanning laser vibrometer is used to measure normal velocity on one surface. The temporal domain measurements are transformed into the frequency domain using a Fourier transform, then, the spatial domain measurements are transformed into the k(x),k(y) wavevector domain using two Fourier transforms. Once the data is in the wavevector-frequency domain, the propagation wavenumber of each specific wave type can be estimated by fitting a circle to each collection of spectral peaks. Using this measured estimate of the wavenumber corresponding to the propagating wave, the Newton-Raphson gradient method is applied (inserting the estimated wavenumber into to the theoretical dispersion curve equation for wave propagation in a fluid-loaded plate,) hence resulting in an estimate of the shear wave speed. An experiment is included to illustrate the method and statistical properties of the measurement are discussed.
C1 [Hull, Andrew J.; Cray, Benjamin A.] USN, Autonomous & Defens Syst Dept, Undersea Warfare Ctr, Newport, RI 02841 USA.
RP Hull, AJ (reprint author), USN, Autonomous & Defens Syst Dept, Undersea Warfare Ctr, Newport, RI 02841 USA.
EM andrew.hull@navy.mil; benjamin.cray@navy.mil
NR 13
TC 0
Z9 0
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1742-6588
J9 J PHYS CONF SER
PY 2009
VL 181
AR 012077
DI 10.1088/1742-6596/181/1/012077
PG 8
WC Engineering, Mechanical; Physics, Condensed Matter
SC Engineering; Physics
GA BVQ89
UT WOS:000292385900077
ER
PT S
AU Baer, W
AF Baer, Wolfgang
BE Revetria, R
Mladenov, B
Mastorakis, N
TI Live/Virtual Cognitive Systems Simulations
SO ACS'09: PROCEEDINGS OF THE 9TH WSEAS INTERNATIONAL CONFERENCE ON APPLIED
COMPUTER SCIENCE
SE Recent Advances in Computer Engineering
LA English
DT Proceedings Paper
CT 9th WSEAS International Conference on Applied Computer Science (ACS'09)
CY OCT 17-19, 2009
CL Univ Genova, Genoa, ITALY
SP WSEAS
HO Univ Genova
DE Cognitive System Simulation; Quantum Computers; Biological Quantum
Effects; Whitehead; Process Ontology
AB Evidence from neuroscience, physics, and cognitive sciences suggest that conscious experience involves a feedback loop between the sensor plane and the memories that hold the explanation of those sensory experiences. If modeled as a loop in time the resulting event provides a basis for a Whitheadean interpretation of Quantum Theory that eliminates the vonNeuman division between the classic and quantum worlds.
I will show that live cognitive systems, serving as operators in a control room, when replaced by such cognitive loops can be treated on the same footing as the quantum systems they observe. This implies our personal every day cognitive experiences must be recognized as quantum phenomena in a new integrated world view that provides a theoretical basis for quantum computation in biological systems at room temperature.
I will then discuss the applications for the simulation of the sensor-memory feedback loop in conventional computer machinery. Though such an implementations only mimics cognitive operations they can provide a new class of image recognition and real world knowledge generation algorithms that are useful in cases where simple real world models are adequate. One such applications in encountered on top down earth models describing the explanation for sensor measurements from Unmanned Aerial Vehicles (UAV). Experiments conducted in support of the development of UAV vision systems will then be reviewed and the future for cognitive vision systems discussed.
C1 USN, Postgrad Sch, Dep Informat Sci Code IS, Monterey, CA 93943 USA.
RP Baer, W (reprint author), USN, Postgrad Sch, Dep Informat Sci Code IS, 1 Univ Circle, Monterey, CA 93943 USA.
EM Baer@nps.edu
NR 10
TC 0
Z9 0
U1 0
U2 0
PU WORLD SCIENTIFIC AND ENGINEERING ACAD AND SOC
PI ATHENS
PA AG LOANNOU THEOLOGOU 17-23, 15773 ZOGRAPHOU, ATHENS, GREECE
SN 1790-5109
BN 978-960-474-127-4
J9 REC ADV COMPUT ENG
PY 2009
BP 56
EP 61
PG 6
WC Computer Science, Interdisciplinary Applications
SC Computer Science
GA BOE82
UT WOS:000276398000007
ER
PT J
AU Zabetakis, D
Dressick, WJ
AF Zabetakis, Daniel
Dressick, Walter J.
TI Selective Electroless Metallization of Patterned Polymeric Films for
Lithography Applications
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Review
DE electroless; self-assembled monolayer; lithography; pattern;
metallization
ID SELF-ASSEMBLED MONOLAYERS; CHANNEL-CONSTRAINED METALLIZATION; DIP-PEN
NANOLITHOGRAPHY; X-RAY-IRRADIATION; SURFACE GRAFT-COPOLYMERIZATION;
DEEP-ULTRAVIOLET LITHOGRAPHY; CURABLE CHITOSAN DERIVATIVES; AQUEOUS
ALKALINE-SOLUTION; METAL-DEPOSITION; THIN-FILMS
AB The fabrication of electrical interconnects to provide power for and communication with computers as their component complementary metal oxide semiconductor (CMOS) devices continue to shrink in size presents significant materials and processing compatibility challenges. We describe here our efforts to address these challenges using top-surface imaging and hybrid photoresist/self-assembled monolayer patterning approaches, in conjunction with selective electroless metal deposition, to develop processes capable of fabricating appropriate submicron and nanoscale metal features useful as electrical interconnects. as well as plasma-etch-resistant masks and metal diffusion barriers. Our efforts focus on the development of cost-effective methods compatible with a manufacturing environment that satisfy materials and process constraints associated with CMOS device production. We demonstrate the fabrication of similar to 50-nm-width features in metal with high fidelity and sufficient control of edge acuity to satisfy current industry design rules using our processes and discuss the challenges and opportunities for fabrication of analogous sub-10-nm metal features.
C1 [Zabetakis, Daniel; Dressick, Walter J.] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
RP Dressick, WJ (reprint author), USN, Res Lab, Ctr Biomol Sci & Engn, Code 6910,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM walter.dressick@nrl.navy.mil
RI beyazkilic, pinar/G-6781-2011
FU Office of Naval Research; DARPA; Rohm & Haas (Shipley Division)
FX We thank the Office of Naval Research, DARPA, and Rohm & Haas (Shipley
Division) for financial support for this work under the NRL Core Funding
Program, Molecular Level Large Area Printing Program, and Shipley-NRL
CRADA Program, respectively. We thank Dr. G. Kubiak of Sandia National
Laboratory for the EUV exposure for Figure 10D.
NR 271
TC 73
Z9 73
U1 4
U2 76
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD JAN
PY 2009
VL 1
IS 1
BP 4
EP 25
DI 10.1021/am800121d
PG 22
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 463HE
UT WOS:000267421200002
PM 20355746
ER
PT J
AU Harney, MB
Pant, RR
Fulmer, PA
Wynne, JH
AF Harney, Matthew B.
Pant, Ramesh R.
Fulmer, Preston A.
Wynne, James H.
TI Surface Self-Concentrating Amphiphilic Quaternary Ammonium Biocides as
Coating Additives
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE additives; antimicrobial; biocide; coating; quaternary ammonium;
self-cleaning; surface-concentrating
ID CONTACT; COPOLYMERS; MODIFIERS
AB A variety of amphiphilic quaternary dimethylammonium compounds bearing n-alkyl and oxyethylene groups have been designed and synthesized as antimicrobial additives for use in self-decontaminating surfaces. The effectiveness of these additives stems from a unique ability to self-concentrate at the air-polymer interface without the incorporation of exotic perfluorinated or polymeric functionalities. X-ray photoelectron, spectroscopy analysis reveals surface enrichment as high as 18-fold, providing a 7-log reduction of both Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. The migration to the surface is a consequence of the hydrophobicity of the additive within the hydrophilic polyurethane resin, over which an unprecedented level of control can be exerted by altering the lengths of the n-alkyl and oxyethylene groups. Thus, for the first time, specific surface and bulk coating concentrations can be achieved as desired using a single class of antimicrobial additives.
C1 [Harney, Matthew B.; Pant, Ramesh R.; Fulmer, Preston A.; Wynne, James H.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
RP Wynne, JH (reprint author), USN, Res Lab, Div Chem, 4555 Overlook Ave SW,Code 6124, Washington, DC 20375 USA.
EM james.wynne@nrl.navy.mil
RI Fulmer, Preston/L-7702-2014
OI Fulmer, Preston/0000-0002-2981-576X
FU Office of Naval Research; Defense Advanced Research Projects Agency;
Defense Sciences Office
FX This work was funded by the Office of Naval Research and the Defense
Advanced Research Projects Agency, Defense Sciences Office. The authors
thank Dr. Robert Brizzalera at the Naval Surface Warfare Center,
Carderock Division, for assistance with XPS analysis.
NR 14
TC 47
Z9 49
U1 1
U2 21
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD JAN
PY 2009
VL 1
IS 1
BP 39
EP 41
DI 10.1021/am800046r
PG 3
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 463HE
UT WOS:000267421200006
PM 20355750
ER
PT J
AU Bevilacqua, R
Romano, M
Yakimenko, O
AF Bevilacqua, R.
Romano, M.
Yakimenko, O.
TI Online generation of quasi-optimal spacecraft rendezvous trajectories
SO ACTA ASTRONAUTICA
LA English
DT Article
DE Online optimization; Direct methods; Spacecraft rendezvous
AB A direct method for rapid generation of combined time-propellant near-optimal trajectories of proximity maneuvers of a chaser spacecraft required to dock a target one, with predetermined thrust history along a master direction, is presented. The predetermined thrust history is generated by applying the Pontryaggin maximum principle. The new direct method, already implemented and tested on board real aircraft, is based on three concepts: high-order polynomials as reference functions, preset on-off sequence of a master control, and reduction of the optimization problem to the determination of a small set of parameters. Presetting the master control, the remaining controls act as slaves, guarantying the chaser to move along the desired path. Seeking of the optimum strategy is transformed into a nonlinear programming problem, and then numerically solved through an ad hoc algorithm in accelerated time scale. Examples are reported to prove the rapidness of the approach to generate a sub-optimal docking trajectory. Published by Elsevier Ltd.
C1 [Bevilacqua, R.; Romano, M.; Yakimenko, O.] USN, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
RP Bevilacqua, R (reprint author), USN, Postgrad Sch, Dept Mech & Astronaut Engn, Code AA-RB,699 Dyer Rd, Monterey, CA 93943 USA.
EM rbevilac@nps.edu; mromano@nps.edu
RI Romano, Marcello/C-7972-2013
NR 16
TC 10
Z9 10
U1 0
U2 8
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0094-5765
J9 ACTA ASTRONAUT
JI Acta Astronaut.
PD JAN-FEB
PY 2009
VL 64
IS 2-3
BP 345
EP 358
DI 10.1016/j.actaastro.2008.08.001
PG 14
WC Engineering, Aerospace
SC Engineering
GA 387DD
UT WOS:000261931000026
ER
PT J
AU Ohodnicki, PR
Qin, YL
Laughlin, DE
McHenry, ME
Kodzuka, M
Ohkubo, T
Hono, K
Willard, MA
AF Ohodnicki, P. R.
Qin, Y. L.
Laughlin, D. E.
McHenry, M. E.
Kodzuka, M.
Ohkubo, T.
Hono, K.
Willard, M. A.
TI Composition and non-equilibrium crystallization in partially devitrified
co-rich soft magnetic nanocomposite alloys
SO ACTA MATERIALIA
LA English
DT Article
DE bcc Nanocrystalline materials; Crystallization; Three-dimensional atom
probe (3DAP); Transmission electron microscopy (TEM)
ID (FE0.5CO0.5)(88)ZR7B4CU1 NANOCRYSTALLINE ALLOYS; SOLID-LIQUID INTERFACE;
PHASE-SELECTION; STRUCTURAL MODEL; NUCLEATION; MELTS; NI;
MICROSTRUCTURE; SOLIDIFICATION; GROWTH
AB The body-centered cubic (bcc) phase tends to preferentially nucleate during solidification of highly undercooled liquid droplets or binary alloy systems, including Fe-Co, Fe-Ni and Fe-Cr-Ni. We investigate a similar tendency during the partial devitrification of Co-rich amorphous precursors of composition Co(1-x)Fe(x))(88)Zr(7)B(4)Cu(1) by identifying the structure and composition of the nanocrystalline grains. The Co:Fe ratio of the bcc nanocrystals varies linearly with the Co:Fe ratio of the amorphous precursor, and can lie well within the single-phase face-centered cubic (fcc) region of the Fe-Co phase diagram at the crystallization temperature. Classical nucleation theory therefore Suggests several potential explanations for the preferential nucleation of bcc phase from an amorphous precursor, including: (i) a reduced amorphous/bcc interface energy as compared to the close-packed phases; (ii) a lower strain of precipitation for bee nuclei its compared to close-packed fcc and hexagonal close-packed nuclei; and (iii) stabilization of the bcc phase by dissolved glass-formers Such as Zr and B. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Ohodnicki, P. R.; Qin, Y. L.; Laughlin, D. E.; McHenry, M. E.] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA.
[Kodzuka, M.; Hono, K.] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan.
[Ohkubo, T.; Hono, K.] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan.
[Willard, M. A.] USN, Res Lab, Multifunct Mat Branch, Washington, DC 20375 USA.
RP Ohodnicki, PR (reprint author), Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA.
EM paul.ohodnicki@gmail.com
RI Willard, Matthew/A-8492-2009; McHenry, Michael/B-8936-2009; Hono,
Kazuhiro/B-9202-2008; Qin, Yueling/K-3109-2012
OI Willard, Matthew/0000-0001-5052-8012; Hono,
Kazuhiro/0000-0001-7367-0193;
FU NSF [DMR-0406220]; National Defense Science and Engineering Graduate
Research Fellowship (NDSEG); Office of Naval Research; CREST; JST; World
Premier International Research Center Initiative (WPI Initiative); MEXT,
Japan
FX This work was supported by NSF grant # DMR-0406220. P.R.O. acknowledges
support from a National Defense Science and Engineering Graduate
Research Fellowship (NDSEG). M.A.W. acknowledges support from the Office
of Naval Research. This work was Supported in part by CREST, JST and the
World Premier International Research Center Initiative (WPI Initiative)
on Materials Nanoarchitronics, MEXT, Japan.
NR 42
TC 31
Z9 31
U1 1
U2 30
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 JAN
PY 2009
VL 57
IS 1
BP 87
EP 96
DI 10.1016/j.actamat.2008.08.051
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 412AJ
UT WOS:000263695300010
ER
PT J
AU Wu, JY
Hong, HS
Shang, SL
Dai, MH
Lee, Z
Li, SJ
AF Wu Jingyu
Hong Huasheng
Shang Shaoling
Dai Minhan
Lee, Zhongping
Li Shaojing
TI A preliminary study of the variation of phytoplankton absorption
coefficients in the northern South China Sea
SO ACTA OCEANOLOGICA SINICA
LA English
DT Article
DE phytoplankton absorption coefficient; variation; picoprokaryotes;
parameterization; South China Sea
ID DISSOLVED ORGANIC-MATTER; PEARL RIVER ESTUARY; SPECTRAL ABSORPTION;
CHLOROPHYLL-A; PIGMENT COMPOSITION; OPTICAL-PROPERTIES;
LIGHT-ABSORPTION; COASTAL WATERS; SIZE STRUCTURE; QUANTUM YIELD
AB The temporal and spatial variabilities of phytoplankton absorption coefficients (a(ph)(lambda)) and their relationships with physical processes in the northern South China Sea were examined., based on in situ data collected from two cruise surveys during May 14 to 25 2001. and November 2 to 21, 2002. Significant changes in the surface water in a,h values and B/R ratios (a(ph)(440)/a(ph)(675)) were observed in May, which were caused by a phytoplankton bloom on the inner shelf stimulated by a large river plume due to heavy precipitation. This is consistent with the observed one order of magnitude elevation of chlorophyll a and a shift from a pico/nano dominated phytoplankton community to one dominated by micro-algae. Enhanced vertical mixing due to strengthened northeast monsoon in November has been observed to result in higher surface a(ph)(675) (0.002-0.006 m(-1) higher) and less pronounced subsurface maximum on the outer shelf/slope in November as compared with that in May. Measurements of a(ph) and B/R ratios from three transects in November revealed a highest surface a(ph)(675) immediately outside the mouth of the Zhujiang (Pearl) River Estuary, whereas lower a(ph)(675) and higher B/R ratios were featured in the outer shelf/slope waters, demonstrating the respective influence of the Zhujiang River plume and the oligotrophic water of the South China Sea. The difference in spectral shapes of phytoplankton absorption (measured by B/R ratios and bathochromic shifts) on these three transects infers that picoprocaryotes are the major component of the phytoplankton community on the outer shelf/slope rather than on the inner shelf. A regional tuning of the phytoplankton absorption spectral model (Carder et al., 1999) was attempted, demonstrating a greater spatial variation than temporal variation in the lead parameter a(0)(lambda). It was thus implicated that region-based parameterization of ocean color remote sensing algorithms in the northern South China Sea was mandatory.
C1 [Wu Jingyu; Hong Huasheng; Shang Shaoling; Dai Minhan; Li Shaojing] Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China.
[Wu Jingyu; Li Shaojing] Xiamen Univ, Dept Oceanog, Xiamen 361005, Peoples R China.
[Lee, Zhongping] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Shang, SL (reprint author), Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China.
EM slshang@gmail.com
RI Hong, HS/G-3347-2010; Shang, SL/G-3405-2010; Dai, Minhan/G-3343-2010
OI Dai, Minhan/0000-0003-0550-0701
FU National Basic Research Program of China [2009CB421200, 2009CB421201];
National Natural Science Foundation of China [40821063]; High-Tech R&D
Program of China [2006AA09A302, 2008AA09Z108]
FX Foundation item: The National Basic Research Program of China under
contract Nos 2009CB421200, 2009CB421201; the National Natural Science
Foundation of China under contract No.40821063; High-Tech R&D Program of
China under contract Nos 2006AA09A302 and 2008AA09Z108.
NR 49
TC 1
Z9 2
U1 0
U2 8
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0253-505X
J9 ACTA OCEANOL SIN
JI Acta Oceanol. Sin.
PY 2009
VL 28
IS 5
BP 17
EP 29
PG 13
WC Oceanography
SC Oceanography
GA 538WG
UT WOS:000273214400003
ER
PT S
AU Shaw, LB
Schwartz, IB
AF Shaw, Leah B.
Schwartz, Ira B.
BE Gross, T
Sayama, H
TI Noise Induced Dynamics in Adaptive Networks with Applications to
Epidemiology
SO ADAPTIVE NETWORKS: THEORY, MODELS AND APPLICATIONS
SE Understanding Complex Systems Springer Complexity
LA English
DT Article; Book Chapter
ID EVOLVING NETWORKS; COMPLEX NETWORKS; SYNCHRONIZATION; BIFURCATIONS;
EMERGENCE; EVOLUTION; MODEL
AB Recent work in modeling the coupling between disease dynamics and dynamic social network geometry has led to the examination of how human interactions force a rewiring of connections in a population. Rewiring of the network may be considered an adaptive response to social forces due to disease spread, which in turn feeds back to the disease dynamics. Such epidemic models, called adaptive networks, have led to new dynamical instabilities along with the creation of multiple attracting states. The co-existence of several attractors is sensitive to internal and external fluctuations, which lead to enhanced stochastic oscillatory outbreaks and disease extinction. The aim of this chapter is to explore the bifurcations of adaptive network models in the presence of fluctuations and to review some of the new fluctuation phenomena induced in adaptive networks.
C1 [Shaw, Leah B.] Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USA.
[Schwartz, Ira B.] USN, Res Lab, Div Plasma Phys, Nonlinear Syst Dynam Sect, Washington, DC 20375 USA.
RP Shaw, LB (reprint author), Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USA.
EM lbshaw@wm.edu; ira.schwartz@nrl.navy.mil
NR 34
TC 1
Z9 1
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 1860-0832
BN 978-3-642-01283-9
J9 UNDERST COMPLEX SYST
PY 2009
BP 209
EP 227
DI 10.1007/978-3-642-01284-6_10
D2 10.1007/978-3-642-01284-6
PG 19
WC Computer Science, Information Systems; Engineering, Multidisciplinary;
Mathematics, Applied; Multidisciplinary Sciences
SC Computer Science; Engineering; Mathematics; Science & Technology - Other
Topics
GA BLA89
UT WOS:000269796600010
ER
PT S
AU Krushelnick, K
Kaganovich, D
Gonsalves, A
AF Krushelnick, Karl
Kaganovich, Dmitri
Gonsalves, Anthony
BE Schroeder, CB
Leemans, W
Esarey, E
TI Summary of Working Group 1: Laser Plasma Wakefield Accelerators
SO ADVANCED ACCELERATOR CONCEPTS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 13th Advanced Accelerator Concepts Workshop
CY JUL 27-AUG 02, 2008
CL Santa Cruz, CA
SP US DOE, Lawrence Berkeley Natl Lab, Univ Calif Berkeley
DE laser produced plasma; electron acceleration
ID MONOENERGETIC ELECTRON-BEAMS; WAKE-FIELD ACCELERATION; PULSES; DRIVEN;
GENERATION
AB There have been many significant experimental and theoretical advances recently with regard to the production of relativistic electron beams using laser wakefield accelerators (LWFA) driven by high Power short pulse lasers. In particular, there has been an explosion of interest in this field following the discovery of methods to generate such beams with low energy spread. In recent work by many groups around the world the energy and quality of these beams has been improved and a more complete understanding of the "bubble" regime of electron acceleration has been obtained, enabling a significant improvement in the output electron beam stability. The 2008 Advanced Accelerator Concepts workshop in Santa Cruz CA brought together the leading groups engaged in this research from around the world. This paper will summarize the major results presented at the conference. Further details on the work described here can be found in the other related papers in these proceedings.
C1 [Krushelnick, Karl] Univ Michigan, CUOS, Ann Arbor, MI 48109 USA.
[Kaganovich, Dmitri] Beam Phys Branch, US Naval Res Lab, Washington, DC USA.
[Gonsalves, Anthony] LOASIS Grp, Lawrence Berkeley Natl Lab, Berkeley, CA USA.
RP Krushelnick, K (reprint author), Univ Michigan, CUOS, Ann Arbor, MI 48109 USA.
OI Kaganovich, Dmitri/0000-0002-0905-5871
NR 41
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0617-9
J9 AIP CONF PROC
PY 2009
VL 1086
BP 67
EP +
PG 3
WC Physics, Applied; Physics, Particles & Fields
SC Physics
GA BJA51
UT WOS:000264166500008
ER
PT S
AU Gordon, DF
Power, JG
AF Gordon, D. F.
Power, J. G.
BE Schroeder, CB
Leemans, W
Esarey, E
TI Summary Report on Beam & Radiation Generation, Monitoring & Control
SO ADVANCED ACCELERATOR CONCEPTS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 13th Advanced Accelerator Concepts Workshop
CY JUL 27-AUG 02, 2008
CL Santa Cruz, CA
SP US DOE, Lawrence Berkeley Natl Lab, Univ Calif Berkeley
DE photoinjector; space charge; beam diagnostics; pulse train
AB The discussions of the working group on beam and radiation generation, monitoring, and control (working group 6) at the 2008 advanced accelerator concepts workshop are summarized. The discussions concerned electron injectors, phase space manipulation, beam diagnostics, pulse train generation, intense beam physics, and radiation generation.
C1 [Gordon, D. F.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Power, J. G.] Argonne Natl Lab, Argonne, IL 60549 USA.
RP Gordon, DF (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0617-9
J9 AIP CONF PROC
PY 2009
VL 1086
BP 111
EP +
PG 3
WC Physics, Applied; Physics, Particles & Fields
SC Physics
GA BJA51
UT WOS:000264166500013
ER
PT S
AU Gold, SH
Kinkead, AK
Gai, W
Power, JG
Konecny, R
Jing, C
Fliflet, AW
AF Gold, S. H.
Kinkead, A. K.
Gai, W.
Power, J. G.
Konecny, R.
Jing, C.
Fliflet, A. W.
BE Schroeder, CB
Leemans, W
Esarey, E
TI Development of a Compact Dielectric-Loaded Test Accelerator at 11.4 GHz
SO ADVANCED ACCELERATOR CONCEPTS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 13th Advanced Accelerator Concepts Workshop
CY JUL 27-AUG 02, 2008
CL Santa Cruz, CA
SP US DOE, Lawrence Berkeley Natl Lab, Univ Calif Berkeley
DE Dielectric-loaded accelerator
AB This paper presents a progress report on the development of a dielectric-loaded test accelerator in the Magnicon Facility at the Naval Research Laboratory (NRL). The accelerator will be powered by an 11.4-GHz magnicon amplifier that provides up to 25 MW of output power in a similar to 250-ns pulse at up to 10 Hz. The accelerator includes a 5-MeV electron injector originally developed at the Tsinghua University in Beijing, China, and can incorporate dielectric-loaded accelerating (DLA) structures of up to 0.5 m in length. The DLA structures are being developed by Argonne National Laboratory and Euclid Techlabs, and shorter test structures fabricated from a variety of dielectric materials have undergone rf testing at NRL at accelerating gradients up to 15 MV/m. The first stage of the accelerator, including the 5-MeV injector, has recently begun operation, and initial operation of the complete dielectric-loaded test accelerator, including injector, DLA test structure, and spectrometer, should take place within the next year.
C1 [Gold, S. H.; Fliflet, A. W.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Gold, SH (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0617-9
J9 AIP CONF PROC
PY 2009
VL 1086
BP 410
EP 414
PG 5
WC Physics, Applied; Physics, Particles & Fields
SC Physics
GA BJA51
UT WOS:000264166500060
ER
PT S
AU Montgomery, EJ
Pan, ZG
Leung, J
Feldman, DW
O'Shea, PG
Jensen, KL
AF Montgomery, Eric J.
Pan, Zhigang
Leung, Jessica
Feldman, Donald W.
O'Shea, Patrick G.
Jensen, Kevin L.
BE Schroeder, CB
Leemans, W
Esarey, E
TI Towards a Robust, Efficient Dispenser Photocathode: the Effect of
Recesiation on Quantum Efficiency
SO ADVANCED ACCELERATOR CONCEPTS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 13th Advanced Accelerator Concepts Workshop
CY JUL 27-AUG 02, 2008
CL Santa Cruz, CA
SP US DOE, Lawrence Berkeley Natl Lab, Univ Calif Berkeley
DE dispenser photocathode; quantum efficiency; free electron laser; cesium
AB Future electron accelerators and Free Electron Lasers (FELs) require high brightness electron sources; photocathodes for such devices are challenged to maintain long life and high electron emission efficiency (high quantum efficiency, or QE). The UMD dispenser photocathode design addresses this tradeoff of robustness and QE. In such a dispenser, a cesium-based surface layer is deposited on a porous substrate. The surface layer can be replenished from a subsurface cesium reservoir under gentle heating, allowing cesium to diffuse controllably to the surface and providing demonstrably more robust photocathodes. In support of the premise that recesiation is able to restore contaminated photocathodes, we here report controlled contamination of cesium-based surface layers with subsequent recesiation and the resulting effect on QE. Contaminant gases investigated include examples known from the vacuum environment of typical electron guns.
C1 [Montgomery, Eric J.; Pan, Zhigang; Leung, Jessica; Feldman, Donald W.; O'Shea, Patrick G.] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA.
[Jensen, Kevin L.] Naval Res Lab, ESTD, Washington, DC 20375 USA.
RP Montgomery, EJ (reprint author), Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA.
RI Jensen, Kevin/I-1269-2015
OI Jensen, Kevin/0000-0001-8644-1680
FU Joint Technology Office; Office of Naval Research
FX This work was funded by the Joint Technology Office and the Office of
Naval Research.
NR 9
TC 5
Z9 5
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0617-9
J9 AIP CONF PROC
PY 2009
VL 1086
BP 599
EP +
PG 2
WC Physics, Applied; Physics, Particles & Fields
SC Physics
GA BJA51
UT WOS:000264166500091
ER
PT S
AU Bender, BA
Gorzkowski, E
Pan, MJ
AF Bender, Barry A.
Gorzkowski, Ed
Pan, Ming-Jen
BE Ohji, T
Singh, M
Wereszczak, A
TI THE EFFECT OF DOPING WITH TITANIA AND CALCIUM TITANATE ON THE
MICROSTRUCTURE AND ELECTRICAL PROPERTIES OF THE GIANT DIELECTRIC
CONSTANT CERAMIC CaCu(3)Ti(4)O(12)
SO ADVANCED PROCESSING AND MANUFACTURING TECHNOLOGIES FOR STRUCTURAL AND
MULTIFUNCTIONAL MATERIALS II
SE CERAMIC ENGINEERING AND SCIENCE PROCEEDINGS
LA English
DT Proceedings Paper
CT 32nd International Conference on Advanced Ceramics and Composites
CY JAN 27-FEB 01, 2008
CL Daytona Beach, FL
SP Amer Ceram Soc, ACerS Engn Ceram Div
ID PEROVSKITE; BARRIER; OXIDE; STABILITY; BEHAVIOR; BARIUM
AB Small amounts (1-5 mole%) of TiO(2) and CaTiO(3) were added to the giant dielectric constant ceramic CaCu(3)Ti(4)O(12) (CCTO) in the attempt to lower dielectric loss without sacrificing high permittivity. The undoped and doped ceramics had similar microstructures consisting of primarily large grains in the range of 35 to 40 microns. Doping CCTO with TiO(2) lead to an increase in the dissipation factor of CaCu(3)Ti(4)O(12) from 0.049 to a high of 0.078, while its permittivity increased from 43949 to 77585. Doping with CaTiO(3) followed a similar trend as the tan delta increased to a high of 0.303 and the dielectric constant at 1 kHz increased to a high of 75687. Doping at these levels also led to a 50% drop in electrical breakdown voltage.
C1 [Bender, Barry A.; Gorzkowski, Ed; Pan, Ming-Jen] USN, Res Lab, Washington, DC 20375 USA.
RP Bender, BA (reprint author), USN, Res Lab, Code 6351, Washington, DC 20375 USA.
NR 35
TC 0
Z9 0
U1 2
U2 4
PU AMER CERAMIC SOC
PI WESTERVILLE
PA 735 CERAMIC PLACE, WESTERVILLE, OH 43081-8720 USA
SN 0196-6219
BN 978-0-470-34499-6
J9 CERAM ENG SCI PROC
PY 2009
VL 29
IS 9
BP 185
EP 194
DI 10.1002/9780470456224.ch20
PG 10
WC Materials Science, Ceramics; Materials Science, Composites
SC Materials Science
GA BJC88
UT WOS:000264857500020
ER
PT S
AU Gorzkowski, EP
Pan, MJ
AF Gorzkowski, E. P.
Pan, M. -J.
BE Nair, KM
Suvorov, D
Schwartz, RW
Guo, R
TI CERAMIC-POLYMER DIELECTRIC COMPOSITES PRODUCED VIA DIRECTIONAL FREEZING
SO ADVANCES IN ELECTROCERAMIC MATERIALS
SE Ceramic Transactions
LA English
DT Proceedings Paper
CT Materials Science and Technology Conference and Exhibition (MS&T 08)
CY OCT 05-09, 2008
CL Pittsburgh, PA
ID ANISOTROPIC INTERFACE KINETICS
AB The freeze casting method was successfully used to create ceramic-polymer composites with the two phases arranged in an electrically parallel configuration. The result is a novel composite that exhibits dielectric constant (K) of up to 4000 for PMN-10PT while maintaining low dielectric loss (< 0.05). The finished composites not only exhibit the high dielectric constant of ferroelectric ceramics but maintain the flexibility and case of post-processing handling of polymer materials. Graceful failure of these samples was observed during dielectric breakdown testing as well as high d(33) and good hysteresis behavior. In fact the PZT-5A samples had a d(33) value of similar to 250 pC/N and a remnant polarization of 15 mu C/cm(2).
C1 [Gorzkowski, E. P.; Pan, M. -J.] USN, Res Lab, Washington, DC 20375 USA.
RP Gorzkowski, EP (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 5
TC 2
Z9 2
U1 0
U2 3
PU AMER CERAMIC SOC
PI WESTERVILLE
PA 735 CERAMIC PLACE, WESTERVILLE, OH 43081-8720 USA
SN 1042-1122
BN 978-0-470-40844-5
J9 CERAM TRANS
PY 2009
VL 204
BP 3
EP 9
PG 7
WC Engineering, Electrical & Electronic; Materials Science, Ceramics
SC Engineering; Materials Science
GA BTM16
UT WOS:000287276300001
ER
PT S
AU Bender, B
Pan, M
AF Bender, B.
Pan, M.
BE Nair, KM
Suvorov, D
Schwartz, RW
Guo, R
TI EFFECT OF DOPANTS AND PROCESSING ON THE MICROSTRUCTURE AND DIELECTRIC
PROPERTIES OF CaCu(3)Ti(4)O(12) (CCTO)
SO ADVANCES IN ELECTROCERAMIC MATERIALS
SE Ceramic Transactions
LA English
DT Proceedings Paper
CT Materials Science and Technology Conference and Exhibition (MS&T 08)
CY OCT 05-09, 2008
CL Pittsburgh, PA
ID GRAIN-BOUNDARY; CERAMICS; CONSTANT; MECHANISM; OXIDE
AB Research has been conducted on the giant dielectric constant oxide CCTO and it has shown that the dielectric material has a giant permittivity (as large as 80,000) that is stable over a range of temperatures and frequencies. However, the typical CCTO ceramic usually has a dielectric loss of 0.1 or higher which needs to be reduced if this dielectric oxide is going to be used commercially. This research has shown that slow cooling in oxygen and annealing at 1000 degrees C can improve the dielectric loss properties. Doping with PbO also improved loss properties and lead to a two-fold increase in breakdown voltage. Co-doping with hafnia and calcia followed by annealing avoided sacrificing permittivity for loss leading to a CaCu(3)Ti(4)O(12) ceramic with a giant dielectric constant of 69,000 and a tan delta of 0.027.
C1 [Bender, B.; Pan, M.] USN, Res Lab, Washington, DC 20375 USA.
RP Bender, B (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 24
TC 1
Z9 1
U1 1
U2 2
PU AMER CERAMIC SOC
PI WESTERVILLE
PA 735 CERAMIC PLACE, WESTERVILLE, OH 43081-8720 USA
SN 1042-1122
BN 978-0-470-40844-5
J9 CERAM TRANS
PY 2009
VL 204
BP 187
EP 197
DI 10.1002/9780470528990.ch21
PG 11
WC Engineering, Electrical & Electronic; Materials Science, Ceramics
SC Engineering; Materials Science
GA BTM16
UT WOS:000287276300021
ER
PT J
AU Karbhari, VM
Love, C
AF Karbhari, V. M.
Love, C.
BE Thomas, S
Weimin, Y
TI Processing of carbon nanotubes and carbon nanotube based nanocomposites
SO ADVANCES IN POLYMER PROCESSING: FROM MACRO TO NANO SCALES
SE Woodhead Publishing in Materials
LA English
DT Article; Book Chapter
DE carbon nanotubes; composites; alignment; processing; performance
attributes
ID MOLECULAR-WEIGHT POLYETHYLENE; SITU EMULSION POLYMERIZATION;
MECHANICAL-PROPERTIES; ELECTRIC-FIELD; CHEMICAL FUNCTIONALIZATION;
POLY(METHYL METHACRYLATE); REINFORCED COMPOSITES; NATURAL-RUBBER;
LOAD-TRANSFER; DISPERSION
AB With the continuing developments in materials synthesis and characterization at the nanoscale the potential of true materials tailoring has been enhanced substantially. In general this class of materials involves structures that have at least one dimension at the nanometer scale (usually taken to be up to 100 nanometers). The utilization of these fibers in polymer composites not only enables the development of uniquely created structures but also provides a means for the development of unique properties and functionalities at levels not possible with conventional fiber reinforced composites. It is the goal of this chapter to introduce the advances in CNT nanocomposite research with specific emphasis on processing routes used to disperse, align and fabricate carbon nanotube reinforced polymer nanocomposites for enhanced physical and mechanical properties. Acknowledging that the potential for CNTs as reinforcement and conductive media has not yet been fully realized, a discussion on future trends is also given.
C1 [Karbhari, V. M.] Univ Alabama, Huntsville, AL 35899 USA.
[Love, C.] USN, Res Labs, Alt Energy Sect, Washington, DC 20375 USA.
RP Karbhari, VM (reprint author), Univ Alabama, 366 Shelbie King Hall, Huntsville, AL 35899 USA.
EM vistasp.karbhari@uah.edu
NR 113
TC 0
Z9 0
U1 0
U2 1
PU WOODHEAD PUBL LTD
PI CAMBRIDGE
PA ABINGTON HALL ABINGTON, CAMBRIDGE CB1 6AH, CAMBS, ENGLAND
BN 978-1-84569-396-1
J9 WOODHEAD PUBL MATER
PY 2009
BP 622
EP 652
DI 10.1533/9781845696429.4.622
D2 10.1533/9781845696429
PG 31
WC Polymer Science
SC Polymer Science
GA BOE79
UT WOS:000276397700020
ER
PT S
AU Bashkansky, M
Dutton, Z
Gulian, A
Walker, D
Fatemi, F
Steiner, M
AF Bashkansky, Mark
Dutton, Zachary
Gulian, Armen
Walker, David
Fatemi, Fredrik
Steiner, Michael
BE Shahriar, SM
Hemmer, PR
Lowell, JR
TI True-Time Delay Steering of Phased Array Radars Using Slow Light
SO ADVANCES IN SLOW AND FAST LIGHT II
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Advances in Slow and Fast Light II
CY JAN 25-27, 2009
CL San Jose, CA
SP SPIE
DE Antenna arrays; radar; slow light; optical fibers; stimulated Brillouin
scattering; Faraday rotator
ID STIMULATED BRILLOUIN-SCATTERING; OPTICAL-FIBER; SINGLE
AB Application of slow light linear delay to squint-free (true-time delay) steering of phased array radar antennae is discussed. Theoretical analysis is provided on true-time delay radar requirements, including delay precision, amplitude precision, and bandwidth. We also discuss an improvement to the slow light technique based on stimulated Brillouin scattering by using a Faraday rotator mirror that provides temporally stable, linear (with pump power) delay, applicable to practical implementations. Future directions are considered.
C1 [Bashkansky, Mark; Gulian, Armen; Walker, David; Fatemi, Fredrik; Steiner, Michael] USN, Res Lab, Washington, DC 20375 USA.
RP Gulian, A (reprint author), USN, Res Lab, Code 5312, Washington, DC 20375 USA.
EM armen.gulian@nrl.navy.mil
NR 21
TC 3
Z9 3
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 978-0-8194-7472-8
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7226
AR 72260A
DI 10.1117/12.816324
PG 13
WC Optics
SC Optics
GA BSQ21
UT WOS:000285377800007
ER
PT S
AU Jacobs, VL
AF Jacobs, Verne L.
BE Shahriar, SM
Hemmer, PR
Lowell, JR
TI Non-linear interactions in electromagnetically induced transparency and
related pump-probe optical phenomena
SO ADVANCES IN SLOW AND FAST LIGHT II
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Advances in Slow and Fast Light II
CY JAN 25-27, 2009
CL San Jose, CA
SP SPIE
DE Density matrix; non-linear electromagnetic interactions; coherence;
electromagnetically induced transparency
ID DENSITY-MATRIX; SLOW LIGHT; RELAXATION; RADIATION; STATES
AB Reduced density matrix descriptions are developed for linear and non-linear interactions in electromagnetically induced transparency and related pump-probe optical phenomena involving moving atomic systems. Applied magnetic fields as well as atomic collisions, together with other environmental decoherence and relaxation processes, are taken into account. Time-domain (equation-of-motion) and frequency-domain (resolvent-operator) formulations are developed in a unified manner. The standard Born (lowest-order perturbation-theory) and Markov (short-memory-time) approximations are systematically introduced within the framework of the general non-perturbative and non-Markovian formulations. A preliminary semiclassical treatment of the electromagnetic interaction is adopted. However, the need for a fully quantum mechanical approach is emphasized. Compact Liouville-space operator expressions are derived for the linear and the general (n'th order) non-linear macroscopic electromagnetic-response tensors within the framework of a perturbation-theory treatment of the semiclassical electromagnetic interaction. These expressions can be evaluated for coherent initial atomic excitations and for the full tetradic-matrix form of the Liouville-space self-energy operator representing the environmental interactions in the Markov approximation. Collisional interactions between atoms can be treated in various approximations for the self-energy operator, and the influence of Zeeman coherences on the electromagnetic-pulse propagation can be investigated.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Jacobs, VL (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM jacobs@dave.nrl.navy.mil
NR 20
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 978-0-8194-7472-8
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7226
AR 722608
DI 10.1117/12.816320
PG 12
WC Optics
SC Optics
GA BSQ21
UT WOS:000285377800005
ER
PT J
AU Hill, JB
Thigpen, BD
Bofill, JA
Magann, E
Moore, LE
Martin, JN
AF Hill, James B.
Thigpen, Brad D.
Bofill, James A.
Magann, Everett
Moore, Lisa E.
Martin, James N., Jr.
TI A Randomized Clinical Trial Comparing Vaginal Misoprostol versus
Cervical Foley Plus Oral Misoprostol for Cervical Ripening and Labor
Induction
SO AMERICAN JOURNAL OF PERINATOLOGY
LA English
DT Article
DE Misoprostol; labor induction; prostaglandins
ID DINOPROSTONE; CATHETER
AB We compared labor induced by vaginal misoprostol versus a supracervical Foley catheter and oral misoprostol. Singleton pregnancies at >= 24 weeks' gestation were randomized to either an initial 25-mu g dose of intravaginal misoprostol, followed by 50-mu g intravaginal doses at 3- to 6-hour intervals, or a supracervical Foley balloon and 100 mu g of oral misoprostol at 4- to 6-hour intervals. Primary outcome was time from induction to delivery. One hundred twenty-six women were randomized to vaginal misoprostol alone (group I) and 106 women to Foley and oral misoprostol (group II). The groups were similar in age, weight, gestational age, parity, indication for induction of labor, and oxytocin use. Cesarean delivery rates at 37% and cesarean indications were similar (p=0.25). The time from induction to delivery in group II (12.9 hours) was significantly shorter than that in group I (17.8 hours, p < 0.001). Uterine tachysystole occurred less often in the vaginal misoprostol group (21% versus 39%, p=0.015). Compared with vaginal misoprostol, delivery within 24 hours was significantly more likely with a Foley balloon and oral misoprostol. The use of terbutaline and peripartum outcomes were similar in the two groups.
C1 [Hill, James B.] USN, Med Ctr Portsmouth, Portsmouth, VA 23708 USA.
[Thigpen, Brad D.; Bofill, James A.; Magann, Everett; Moore, Lisa E.; Martin, James N., Jr.] Univ Mississippi, Dept Obstet & Gynecol, Jackson, MS 39216 USA.
RP Hill, JB (reprint author), USN, Med Ctr Portsmouth, 620 John Paul Jones Circle Portsmouth, Portsmouth, VA 23708 USA.
EM james.hill4@med.navy.mil
OI Moore, Lisa/0000-0001-9232-9302
NR 16
TC 19
Z9 20
U1 0
U2 0
PU THIEME MEDICAL PUBL INC
PI NEW YORK
PA 333 SEVENTH AVE, NEW YORK, NY 10001 USA
SN 0735-1631
J9 AM J PERINAT
JI Am. J. Perinatol.
PD JAN
PY 2009
VL 26
IS 1
BP 33
EP 38
DI 10.1055/s-0028-1091396
PG 6
WC Obstetrics & Gynecology; Pediatrics
SC Obstetrics & Gynecology; Pediatrics
GA 391US
UT WOS:000262260300006
PM 18850516
ER
PT J
AU Smith, AD
Harland, RC
Testa, G
Gentry, S
AF Smith, Ann D.
Harland, Robert C.
Testa, Giuliano
Gentry, Sommer
TI The Markov Decision Process Can Help Maximize Benefits in Paired Kidney
Donation.
SO AMERICAN JOURNAL OF TRANSPLANTATION
LA English
DT Meeting Abstract
CT 9th Joint Meeting of the
American-Society-of-Transplant-Surgeon/American-Society-of-Transplantati
on
CY MAY 30-JUN 03, 2009
CL Boston, MA
SP Amer Soc Transplant Surg, Amer Soc Transplantat
C1 [Smith, Ann D.; Harland, Robert C.; Testa, Giuliano] Univ Chicago, Chicago, IL 60637 USA.
[Gentry, Sommer] USN Acad, Annapolis, MD 21402 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1600-6135
J9 AM J TRANSPLANT
JI Am. J. Transplant.
PY 2009
VL 9
BP 285
EP 285
PG 1
WC Surgery; Transplantation
SC Surgery; Transplantation
GA 431NQ
UT WOS:000265068800324
ER
PT J
AU Andreoni, K
Sleeman, E
Hanto, R
McBride, M
Cherikh, W
Samana, C
Segev, D
Gentry, S
Sandholm, T
Cecka, JM
AF Andreoni, Kenneth
Sleeman, Elizabeth
Hanto, Ruthanne
McBride, Maureen
Cherikh, Wida
Samana, Ciara
Segev, Dorry
Gentry, Sommer
Sandholm, Tuomas
Cecka, J. Michael
TI Development of a National Kidney Paired Donation Pilot Program.
SO AMERICAN JOURNAL OF TRANSPLANTATION
LA English
DT Meeting Abstract
CT 9th Joint Meeting of the
American-Society-of-Transplant-Surgeon/American-Society-of-Transplantati
on
CY MAY 30-JUN 03, 2009
CL Boston, MA
SP Amer Soc Transplant Surg, Amer Soc Transplantat
C1 [Andreoni, Kenneth] Ohio State Univ, Med Ctr, Columbus, OH 43210 USA.
[Sleeman, Elizabeth; McBride, Maureen; Cherikh, Wida; Samana, Ciara] UNOS, Richmond, VA USA.
[Hanto, Ruthanne] New England Organ Bank Inc, Newton, MA USA.
[Segev, Dorry] Johns Hopkins Univ, Baltimore, MD USA.
[Gentry, Sommer] USN Acad, Annapolis, MD 21402 USA.
[Sandholm, Tuomas] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
[Cecka, J. Michael] Univ Calif Los Angeles, Immunogenet Ctr, Los Angeles, CA USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1600-6135
J9 AM J TRANSPLANT
JI Am. J. Transplant.
PY 2009
VL 9
BP 435
EP 435
PG 1
WC Surgery; Transplantation
SC Surgery; Transplantation
GA 431NQ
UT WOS:000265068800854
ER
PT J
AU Hawksworth, JS
Graybill, C
Brown, TS
Tadaki, DK
Elster, EA
AF Hawksworth, Jason S.
Graybill, Christopher
Brown, Trevor S.
Tadaki, Doug K.
Elster, Eric A.
TI Lymphocyte Immunomodulation Improves Survival in Experimental
Hemorrhagic Shock.
SO AMERICAN JOURNAL OF TRANSPLANTATION
LA English
DT Meeting Abstract
CT 9th Joint Meeting of the
American-Society-of-Transplant-Surgeon/American-Society-of-Transplantati
on
CY MAY 30-JUN 03, 2009
CL Boston, MA
SP Amer Soc Transplant Surg, Amer Soc Transplantat
C1 [Hawksworth, Jason S.; Graybill, Christopher; Brown, Trevor S.; Tadaki, Doug K.; Elster, Eric A.] USN, Med Res Ctr, Silver Spring, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1600-6135
J9 AM J TRANSPLANT
JI Am. J. Transplant.
PY 2009
VL 9
BP 579
EP 579
PG 1
WC Surgery; Transplantation
SC Surgery; Transplantation
GA 431NQ
UT WOS:000265068801400
ER
PT J
AU Meyerson, MD
AF Meyerson, Mark D.
TI A Solid with the Rupert Property
SO AMERICAN MATHEMATICAL MONTHLY
LA English
DT Letter
C1 USN Acad, Annapolis, MD 21402 USA.
RP Meyerson, MD (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU MATHEMATICAL ASSOC AMER
PI WASHINGTON
PA 1529 18TH STREET NW, WASHINGTON, DC 20036 USA
SN 0002-9890
J9 AM MATH MON
JI Am. Math. Mon.
PD JAN
PY 2009
VL 116
IS 1
BP 83
EP 84
PG 2
WC Mathematics
SC Mathematics
GA 388YJ
UT WOS:000262056000017
ER
PT J
AU Snow, AW
Foos, EE
Coble, MM
Jernigan, GG
Ancona, MG
AF Snow, Arthur W.
Foos, Edward E.
Coble, Melissa M.
Jernigan, Glenn G.
Ancona, Mario G.
TI Fluorine-labeling as a diagnostic for thiol-ligand and gold nanocluster
self-assembly
SO ANALYST
LA English
DT Article
ID RAY PHOTOELECTRON-SPECTROSCOPY; X-RAY; STRUCTURAL-CHARACTERIZATION;
NANOPARTICLE ARRAYS; PROTEIN ADSORPTION; NUMBER DENSITY; MONOLAYERS;
SURFACES; FILMS; AU
AB An omega-fluorine-labeled oxyethylene thiol ligand, F(CH2CH2O)(2)CH2CH2SH, was synthesized, characterized and incorporated into mixed self-assembled monolayers with CH3(OCH2CH2)(3)SH onto a planar gold substrate and onto 2 nm gold nanoclusters. The fluorine-labeled nanocluster was self-assembled onto gold substrates using alkane dithiol (HS(CH2)(n)SH; n - 5, 8, 11) and oxyethylene dithiol (HS(CH2CH2O)(n)CH2CH2SH; n - 1, 2, 3) linking agents with equivalent chain lengths for comparative purposes. X-ray photoelectron spectroscopy (XPS) was used to track the fluorine-label in the self-assembly operations and to evaluate the effectiveness of the dithiols. For adequate XPS sensitivity at least 10% of the monolayer-forming molecules should be functionalized with this fluorine-label. In the comparative self-assembly of the fluorine-labeled gold nanoclusters in chloroform solution, the alkane dithiols were observed to be the more effective linking agents. This effectiveness correlates with the XPS analysis of alkane dithiols self-assembling onto the gold substrates with a higher packing density and with a larger fraction of molecules having one thiol group as opposed to two bonded to the gold surface. The oxyethylene dithiols self-assemble with a smaller packing density and a smaller fraction of molecules with an unbonded thiol group available for self-assembly.
C1 [Snow, Arthur W.; Foos, Edward E.; Coble, Melissa M.; Jernigan, Glenn G.; Ancona, Mario G.] USN, Res Lab, Washington, DC 20375 USA.
RP Snow, AW (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM arthur.snow@nrl.navy.mil
FU The Office of Naval Research; The NRL Student Temporary Employment
Program
FX The Office of Naval Research is gratefully acknowledged for financial
support. The NRL Student Temporary Employment Program is also
acknowledged by MMC for financial support. Prof. James E. Whitten of
University of Massachusetts, Lowell is very appreciatively acknowledged
for helpful discussion and suggestions.
NR 71
TC 12
Z9 12
U1 3
U2 15
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 0003-2654
J9 ANALYST
JI Analyst
PY 2009
VL 134
IS 9
BP 1790
EP 1801
DI 10.1039/b906510p
PG 12
WC Chemistry, Analytical
SC Chemistry
GA 484QX
UT WOS:000269063100008
PM 19684901
ER
PT J
AU Hysell, DL
Chau, JL
Huba, JD
AF Hysell, D. L.
Chau, J. L.
Huba, J. D.
TI Topside measurements at Jicamarca during solar minimum
SO ANNALES GEOPHYSICAE
LA English
DT Article
DE Ionosphere; Equatorial ionosphere; Ion chemistry and composition; Radio
science; Instruments and techniques
ID INCOHERENT-SCATTER SPECTRUM; ELECTRON COULOMB COLLISIONS; F-REGION;
RADAR; MODEL; IONOSPHERE; GUISDAP; MIDDLE; POWER; HE+
AB Long-pulse topside radar data acquired at Jicamarca and processed using full-profile analysis are compared to data processed using more conventional, range-gated approaches and with analytic and computational models. The salient features of the topside observations include a dramatic increase in the T(e)/T(i) temperature ratio above the F peak at dawn and a local minimum in the topside plasma temperature in the afternoon. The hydrogen ion fraction was found to exhibit hyperbolic tangent-shaped profiles that become shallow (gradually changing) above the O(+)-H(+) transition height during the day. The profile shapes are generally consistent with diffusive equilibrium, although shallowing to the point of changes in inflection can only be accounted for by taking the effects of E x B drifts and meridional winds into account. The SAMI2 model demonstrates this as well as the substantial effect that drifts and winds can have on topside temperatures. Significant quiet-time variability in the topside composition and temperatures may be due to variability in the mechanical forcing. Correlations between topside measurements and magnetometer data at Jicamarca support this hypothesis.
C1 [Hysell, D. L.] Cornell Univ, Ithaca, NY 14853 USA.
[Chau, J. L.] Inst Geofis Peru, Radio Observ Jicamarca, Lima, Peru.
[Huba, J. D.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Hysell, DL (reprint author), Cornell Univ, Ithaca, NY 14853 USA.
EM david.hysell@cornell.edu
RI Chau, Jorge/C-7568-2013
OI Chau, Jorge/0000-0002-2364-8892
FU ONR (JDH); NSF [ATM-0432565]
FX We appreciate helpful advice from C. La Hoz, W. E. Swartz, and D. T.
Farley. This research has been funded, in part, by ONR (JDH). The
Jicamarca Radio Observatory is a facility of the Instituto Geofisico del
Peru operated with support from NSF cooperative agreement ATM-0432565
through Cornell University. We appreciate the help of the Jicamarca
staff, particularly that of L. Condori.
NR 41
TC 15
Z9 15
U1 1
U2 3
PU COPERNICUS PUBLICATIONS
PI KATHLENBURG-LINDAU
PA MAX-PLANCK-STR 13, KATHLENBURG-LINDAU, 37191, GERMANY
SN 0992-7689
J9 ANN GEOPHYS-GERMANY
JI Ann. Geophys.
PY 2009
VL 27
IS 1
BP 427
EP 439
PG 13
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 414BT
UT WOS:000263839600031
ER
PT J
AU Krall, J
Huba, JD
Joyce, G
Zalesak, ST
AF Krall, J.
Huba, J. D.
Joyce, G.
Zalesak, S. T.
TI Three-dimensional simulation of equatorial spread-F with meridional wind
effects
SO ANNALES GEOPHYSICAE
LA English
DT Article
DE Ionosphere; Equatorial ionosphere; Ionosphere-atmosphere interactions;
Ionospheric irregularities
ID MODEL; IONOSPHERE
AB The NRL SAMI3 three-dimensional simulation code is used to examine the effect of meridional winds on the growth and suppression of equatorial spread F (ESF). The simulation geometry conforms to a dipole field geometry with field-line apex heights from 200 to 1600 km at the equator, but extends over only 4 degrees in longitude. The full SAMI3 ionosphere equations are included, providing ion dynamics both along and across the field. The potential is solved in two dimensions in the equatorial plane under a field-line equipotential approximation. By selectively including terms in the potential equation, the reduced growth predicted by Maruyama (1988) and the stabilization predicted by Zalesak and Huba (1991) are separately realized. We find that ESF is stabilized by a sufficiently large constant meridional wind (60 m/s in our example).
C1 [Krall, J.; Huba, J. D.; Zalesak, S. T.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Joyce, G.] Icarus Res Inc, Bethesda, MD 20824 USA.
RP Krall, J (reprint author), USN, Res Lab, Div Plasma Phys, Code 6790,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM jonathan.krall@nrl.navy.mil
NR 23
TC 24
Z9 26
U1 1
U2 5
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 0992-7689
EI 1432-0576
J9 ANN GEOPHYS-GERMANY
JI Ann. Geophys.
PY 2009
VL 27
IS 5
BP 1821
EP 1830
PG 10
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 450NC
UT WOS:000266406300002
ER
PT J
AU Maruyama, T
Saito, S
Kawamura, M
Nozaki, K
Krall, J
Huba, JD
AF Maruyama, T.
Saito, S.
Kawamura, M.
Nozaki, K.
Krall, J.
Huba, J. D.
TI Equinoctial asymmetry of a low-latitude ionosphere-thermosphere system
and equatorial irregularities: evidence for meridional wind control
SO ANNALES GEOPHYSICAE
LA English
DT Article
DE Ionosphere; Ionosphere-atmosphere interactions; Ionospheric
irregularities; Meteorology and atmospheric dynamics; Thermospheric
dynamics
ID MIDNIGHT TEMPERATURE MAXIMUM; SPREAD-F IRREGULARITIES; LONGITUDINAL
VARIABILITY; PLASMA BUBBLES; GPS RECEIVERS; MODEL; SCINTILLATIONS;
INDONESIA; HAWAII
AB Nocturnal ionospheric height variations were analyzed along the meridian of 100 degrees E by using ionosonde data. Two ionosondes were installed near the magnetic conjugate points at low latitudes, and the third station was situated near the magnetic equator. Ionospheric virtual heights were scaled every 15 min and vertical E x B drift velocities were inferred from the equatorial station. By incorporating the inferred equatorial vertical drift velocity, ionospheric bottom heights with the absence of wind were modeled for the two low-latitude conjugate stations, and the deviation in heights from the model outputs was used to infer the transequatorial meridional thermospheric winds. The results obtained for the September and March equinoxes of years 2004 and 2005, respectively, were compared, and a significant difference in the meridional wind was found. An oscillation with a period of approximately 7 h of the meridional wind existed in both the equinoxes, but its amplitude was larger in September as compared to that in March. When the equatorial height reached the maximum level due to the evening enhancement of the zonal electric field, the transequatorial meridional wind velocity reached approximately 10 and 40 m/s for the March and September equinoxes, respectively. This asymmetry of the ionosphere-thermosphere system was found to be associated with the previously reported equinoctial asymmetry of equatorial ionospheric irregularities; the probability for equatorial irregularities to occur is higher in March as compared to that in September at the Indian to Western Pacific longitudes. Numerical simulations of plasma bubble developments were conducted by incorporating the transequatorial neutral wind effect, and the results showed that the growth time (e-folding time) of the bubble was halved when the wind velocity changed from 10 to 40 m/s.
C1 [Maruyama, T.; Saito, S.; Kawamura, M.; Nozaki, K.] Natl Inst Informat & Commun Technol, Koganei, Tokyo 1848795, Japan.
[Krall, J.; Huba, J. D.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Maruyama, T (reprint author), Natl Inst Informat & Commun Technol, 2-1 Nukui Kita 4 Chome, Koganei, Tokyo 1848795, Japan.
EM tmaru@nict.go.jp
FU King Mongkut's Institute of Technology Ladkrabang, Thailand; Chiang Mai
University, Thailand; Office of Naval Research; National Aeronautics and
Space Administration, USA
FX We thank N. Hemmakorn and T. Boonchuk of King Mongkut's Institute of
Technology Ladkrabang, Thailand and T. Komolmis of Chiang Mai
University, Thailand for supporting the SEALION project. The research at
the Naval Research Laboratory has been supported by the Office of Naval
Research and by the National Aeronautics and Space Administration, USA.;
Topical Editor K. Kauristie thanks two anonymous referees for their help
in evaluating this paper.
NR 35
TC 16
Z9 16
U1 2
U2 6
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 0992-7689
EI 1432-0576
J9 ANN GEOPHYS-GERMANY
JI Ann. Geophys.
PY 2009
VL 27
IS 5
BP 2027
EP 2034
PG 8
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 450NC
UT WOS:000266406300021
ER
PT J
AU Lugaz, N
Vourlidas, A
Roussev, II
AF Lugaz, N.
Vourlidas, A.
Roussev, I. I.
TI Deriving the radial distances of wide coronal mass ejections from
elongation measurements in the heliosphere - application to CME-CME
interaction
SO ANNALES GEOPHYSICAE
LA English
DT Article
DE Interplanetary physics; Interplanetary shocks; Solar physics,
astrophysics, and astronomy; Flares and mass ejections; Instruments and
techniques
ID SOLAR-WIND; EARTH; SUN; PROPAGATION; SIMULATION; MODEL; RECONSTRUCTION;
BRIGHTNESS; SPACECRAFT; TRANSIENT
AB We present general considerations regarding the derivation of the radial distances of coronal mass ejections (CMEs) from elongation angle measurements such as those provided by SECCHI and SMEI, focusing on measurements in the Heliospheric Imager 2 (HI-2) field of view (i.e. past 0.3 AU). This study is based on a three-dimensional (3-D) magneto-hydrodynamics (MHD) simulation of two CMEs observed by SECCHI on 24-27 January 2007. Having a 3-D simulation with synthetic HI images, we are able to compare the two basic methods used to derive CME positions from elongation angles, the so-called "Point-P" and "Fixed-phi" approximations. We confirm, following similar works, that both methods, while valid in the most inner heliosphere, yield increasingly large errors in HI-2 field of view for fast and wide CMEs. Using a simple model of a CME as an expanding self-similar sphere, we derive an analytical relationship between elongation angles and radial distances for wide CMEs. This relationship is simply the harmonic mean of the "Point-P" and "Fixed-phi" approximations and it is aimed at complementing 3-D fitting of CMEs by cone models or flux rope shapes. It proves better at getting the kinematics of the simulated CME right when we compare the results of our line-of-sights to the MHD simulation. Based on this approximation, we re-analyze the J-maps (time-elongation maps) in 26 -27 January 2007 and present the first observational evidence that the merging of CMEs is associated with a momentum exchange from the faster ejection to the slower one due to the propagation of the shock wave associated with the fast eruption through the slow eruption.
C1 [Lugaz, N.; Roussev, I. I.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Vourlidas, A.] USN, Res Lab, Washington, DC 20375 USA.
RP Lugaz, N (reprint author), Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA.
EM nlugaz@ifa.hawaii.edu
RI Vourlidas, Angelos/C-8231-2009; Roussev, Ilia/E-9141-2011; Lugaz,
Noe/C-1284-2008
OI Vourlidas, Angelos/0000-0002-8164-5948; Lugaz, Noe/0000-0002-1890-6156
FU NSF [ATM-0639335, ATM-0819653]; NASA [NNX-08AQ16G]; Naval Research
Laboratory, Lockheed Martin Solar and Astrophysics Lab; NASA Goddard
Space Flight Center (USA); Rutherford Appleton Laboratory; University of
Birmingham (UK); Max-Planck-Institut fur Sonnensystemforschung
(Germany); Centre Spatiale de Liege (Belgium); Institut d'Optique
Theorique et Appliquee; Institut d'Astrophysique Spatiale (France); ESA;
NASA; SOHO LASCO/EIT; Catholic University of America; US Naval Research
Laboratory (NRL)
FX The research for this manuscript was supported by NSF grants ATM-0639335
and ATM-0819653 as well as NASA grant NNX-08AQ16G. We would like to
thank the reviewers, Tim Howard and an anonymous referee for helping us
to improve and to clarify this manuscript. The SECCHI data are produced
by an international consortium of Naval Research Laboratory, Lockheed
Martin Solar and Astrophysics Lab, and NASA Goddard Space Flight Center
(USA), Rutherford Appleton Laboratory, and University of Birmingham
(UK), Max-Planck-Institut fur Sonnensystemforschung (Germany), Centre
Spatiale de Liege (Belgium), Institut d'Optique Theorique et Appliquee,
and Institut d'Astrophysique Spatiale (France). SOHO is a project of
international cooperation between ESA and NASA, and the SOHO LASCO/EIT
catalogs are maintained by NASA, the Catholic University of America, and
the US Naval Research Laboratory (NRL). Topical Editor R. Forsyth thanks
T. Howard and another anonymous referee for their help in evaluating
this paper.
NR 38
TC 82
Z9 86
U1 1
U2 5
PU COPERNICUS PUBLICATIONS
PI KATHLENBURG-LINDAU
PA MAX-PLANCK-STR 13, KATHLENBURG-LINDAU, 37191, GERMANY
SN 0992-7689
J9 ANN GEOPHYS-GERMANY
JI Ann. Geophys.
PY 2009
VL 27
IS 9
BP 3479
EP 3488
PG 10
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 500RH
UT WOS:000270321600010
ER
PT J
AU Bernhardt, PA
Selcher, CA
Lehmberg, RH
Rodriguez, S
Thomason, J
McCarrick, M
Frazer, G
AF Bernhardt, P. A.
Selcher, C. A.
Lehmberg, R. H.
Rodriguez, S.
Thomason, J.
McCarrick, M.
Frazer, G.
TI Determination of the electron temperature in the modified ionosphere
over HAARP using the HF pumped Stimulated Brillouin Scatter (SBS)
emission lines
SO ANNALES GEOPHYSICAE
LA English
DT Article
DE Electromagnetics; Wave propagation; Ionosphere; Active experiments;
Radio science; Waves in plasma
ID STANDING WAVE PATTERN; RADIO-WAVES; REFLECTION REGION
AB An ordinary mode electromagnetic wave can decay into an ion acoustic wave and a scattered electromagnetic wave by a process called stimulated Brillouin scatter (SBS). The first detection of this process during ionospheric modification with high power radio waves was reported by Norin et al. (2009) using the HAARP transmitter in Alaska. Subsequent experiments have provided additional verification of this process and quantitative interpretation of the scattered wave frequency offsets to yield measurements of the electron temperatures in the heated ionosphere. Using the SBS technique, electron temperatures between 3000 and 4000 K were measured over the HAARP facility. The matching conditions for decay of the high frequency pump wave show that in addition to the production of an ion-acoustic wave, an electrostatic ion cyclotron wave may also be produced by the generalized SBS processes. Based on the matching condition theory, the first profiles of the scattered wave amplitude are produced using the stimulated Brillouin scatter (SBS) matching conditions. These profiles are consistent with maximum ionospheric interactions at the upper-hybrid resonance height and at a region just below the plasma resonance altitude where the pump wave electric fields reach their maximum values.
C1 [Bernhardt, P. A.; Selcher, C. A.; Lehmberg, R. H.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Rodriguez, S.; Thomason, J.] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
[McCarrick, M.] BAE Syst, Washington, DC USA.
[Frazer, G.] DSTO, ISR Div, Edinburgh, SA, Australia.
RP Bernhardt, PA (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM paul.bernhardt@nrl.navy.mil
FU Office of Naval Research Laboratory; High Frequency Aurora Research
Program (HAARP) through the Air Force Research Laboratory (AFRL)
FX This research was funded at NRL by the Office of Naval Research
Laboratory. The research was also supported in part by the High
Frequency Aurora Research Program (HAARP) through the Air Force Research
Laboratory (AFRL). The authors thank Steven P. Obenchain for discussions
about laser plasma interactions.
NR 20
TC 22
Z9 22
U1 1
U2 1
PU COPERNICUS PUBLICATIONS
PI KATHLENBURG-LINDAU
PA MAX-PLANCK-STR 13, KATHLENBURG-LINDAU, 37191, GERMANY
SN 0992-7689
J9 ANN GEOPHYS-GERMANY
JI Ann. Geophys.
PY 2009
VL 27
IS 12
BP 4409
EP 4427
PG 19
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 536RA
UT WOS:000273060300005
ER
PT J
AU Kilpua, EKJ
Pomoell, J
Vourlidas, A
Vainio, R
Luhmann, J
Li, Y
Schroeder, P
Galvin, AB
Simunac, K
AF Kilpua, E. K. J.
Pomoell, J.
Vourlidas, A.
Vainio, R.
Luhmann, J.
Li, Y.
Schroeder, P.
Galvin, A. B.
Simunac, K.
TI STEREO observations of interplanetary coronal mass ejections and
prominence deflection during solar minimum period
SO ANNALES GEOPHYSICAE
LA English
DT Article
DE Interplanetary physics; Interplanetary magnetic fields; Solar wind
plasma; Solar physics, astrophysics, and astronomy; Flares and mass
ejections
ID MAGNETIC CLOUDS; FILAMENTS; MAXIMUM; REGIONS; STORMS; SHOCK; WIND
AB In this paper we study the occurrence rate and solar origin of interplanetary coronal mass ejections (ICMEs) using data from the two Solar TErrestrial RElation Observatory (STEREO) and the Wind spacecraft. We perform a statistical survey of ICMEs during the late declining phase of solar cycle 23. Observations by multiple, well-separated spacecraft show that even at the time of extremely weak solar activity a considerable number of ICMEs were present in the interplanetary medium. Soon after the beginning of the STEREO science mission in January 2007 the number of ICMEs declined to less than one ICME per month, but in late 2008 the ICME rate clearly increased at each spacecraft although no apparent increase in the number of coronal mass ejections (CMEs) occurred. We suggest that the near-ecliptic ICME rate can increase due to CMEs that have been guided towards the equator from their high-latitude source regions by the magnetic fields in the polar coronal holes.
We consider two case studies to highlight the effects of the polar magnetic fields and CME deflection taking advantage of STEREO observations when the two spacecraft were in the quadrature configuration (i.e. separated by about 90 degrees). We study in detail the solar and interplanetary consequences of two CMEs that both originated from high-latitude source regions on 2 November 2008. The first CME was slow (radial speed 298 km/s) and associated with a huge polar crown prominence eruption. The CME was guided by polar coronal hole fields to the equator and it produced a clear flux rope ICME in the near-ecliptic solar wind. The second CME (radial speed 438 km/s) originated from an active region 11007 at latitude 35 degrees N. This CME propagated clearly north of the first CME and no interplanetary consequences were identified. The two case studies suggest that slow and elongated CMEs have difficulties overcoming the straining effect of the overlying field and as a consequence they are guided by the polar coronal fields and cause in-situ effects close to the ecliptic plane. The 3-D propagation directions and CME widths obtained by using the forward modelling technique were consistent with the solar and in-situ observations.
C1 [Kilpua, E. K. J.; Pomoell, J.; Vainio, R.] Univ Helsinki, Dept Phys, Div Atmospher Sci & Geophys, FIN-00014 Helsinki, Finland.
[Luhmann, J.; Li, Y.; Schroeder, P.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Vourlidas, A.] USN, Res Lab, Solar Phys Branch, Washington, DC 20375 USA.
[Galvin, A. B.; Simunac, K.] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.
RP Kilpua, EKJ (reprint author), Univ Helsinki, Dept Phys, Div Atmospher Sci & Geophys, FIN-00014 Helsinki, Finland.
EM emilia.kilpua@helsinki.fi
RI Vainio, Rami/A-5590-2009; Kilpua, Emilia/G-8994-2012; Galvin,
Antoinette/A-6114-2013; Vourlidas, Angelos/C-8231-2009
OI Vainio, Rami/0000-0002-3298-2067; Vourlidas, Angelos/0000-0002-8164-5948
FU NASA; University of California Berkeley [NAS5-03131]; University of New
Hampshire [NAS5-00132]; Naval Research Laboratory [DPRS-13631-Y]; UCLA
Space Physics Center, Academy of Finland [121650, 124837, 130298];
Vaisala Foundation
FX The sunspot dates were archived through SIDC-team, World Data Center for
the Sunspot Index, Royal Observatory of Belgium. This work utilizes data
obtained by the Global Oscillation Network Group (GONG) Program, managed
by the National Solar Observatory, which is operated by AURA, Inc. under
a cooperative agreement with the National Science Foundation. We thank
R. Lepping for the WIND Magnetic Field Investigation data, R. P. Lin for
the WIND 3-D-plasma data and K. W. Ogilvie for the WIND SWE data.
Support for the STEREO mission in-situ data processing and analysis was
provided through NASA contracts to the IMPACT, PLASTIC and SECCHI teams
(the IMPACT contract to University of California Berkeley NAS5-03131,
the PLASTIC contract to University of New Hampshire NAS5-00132, and the
SECCHI contract to Naval Research Laboratory DPRS-13631-Y). STEREO
magnetic field and plasma data were achieved through UCLA Space Physics
Center. Academy of Finland (projects 121650, 124837, 130298) and Vaisala
Foundation are thanked for financial support.
NR 41
TC 48
Z9 49
U1 0
U2 4
PU COPERNICUS PUBLICATIONS
PI KATHLENBURG-LINDAU
PA MAX-PLANCK-STR 13, KATHLENBURG-LINDAU, 37191, GERMANY
SN 0992-7689
J9 ANN GEOPHYS-GERMANY
JI Ann. Geophys.
PY 2009
VL 27
IS 12
BP 4491
EP 4503
PG 13
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 536RA
UT WOS:000273060300011
ER
PT S
AU Wood, DP
Murphy, J
McLay, R
Koffman, R
Spira, J
Obrecht, RE
Pyne, J
Wiederhold, BK
AF Wood, Dennis Patrick
Murphy, Jennifer
McLay, Robert
Koffman, Robert
Spira, James
Obrecht, Robert E.
Pyne, Jeff
Wiederhold, Brenda K.
BE Wiederhold, BK
Riva, G
TI Cost Effectiveness of Virtual Reality Graded Exposure Therapy with
Physiological Monitoring for the Treatment of Combat Related Post
Traumatic Stress Disorder
SO ANNUAL REVIEW OF CYBERTHERAPY AND TELEMEDICINE 2009: ADVANCED
TECHNOLOGIES IN THE BEHAVIORAL, SOCIAL AND NEUROSCIENCES
SE Studies in Health Technology and Informatics
LA English
DT Article; Book Chapter
DE Virtual Reality Graded Exposure Therapy (VRGET); physiological
monitoring; Operation Enduring Freedom (OEF); Operation Iraqi Freedom
(OIF); Post-Traumatic Stress Disorder (PTSD)
AB Virtual Reality Graded Exposure Therapy (VRGET) is an effective treatment for combat-related PTSD. We summarize the outcomes of a VRGET Pilot Study with 12 participants who completed one to multiple combat tours in Support of the War on Terrorism and who were subsequently diagnosed with combat-related PTSD. Details of the collaborative program amongst the Virtual Reality Medical Center (VRMC), Office of Naval Research, the Naval Medical Center San Diego (NMCSD) and the Navy Hospital Camp Pendleton are discussed as is the VRGET outcomes of significant reductions in PTSD symptoms severity. We also described the estimated cost-effectiveness of VRGET for the treatment of combat-related PTSD, as contrasted to Treatment as Usual (TAU) for combat-related PTSD.
C1 [Wood, Dennis Patrick; Spira, James; Wiederhold, Brenda K.] Virtual Real Med Ctr, San Diego, CA USA.
[Murphy, Jennifer] USN, San Diego Med Ctr, Naval Ctr Combat & Operat Stress Control, San Diego, CA USA.
[McLay, Robert] USN, San Diego Med Ctr, Directorate Mental Hlth, San Diego, CA USA.
[McLay, Robert] Bur Med & Surg, Washington, DC USA.
[Obrecht, Robert E.] USN, Amphibious Base Coronado, Naval Special Warfare Grp 1, San Diego, CA 92152 USA.
[Pyne, Jeff] Cent Arkansas Vet Healthcare Syst, Ctr Mental Healthcare Outcomes Res, N Little Rock, AR USA.
RP Wood, DP (reprint author), Virtual Real Med Ctr, San Diego, CA USA.
NR 20
TC 10
Z9 10
U1 0
U2 7
PU IOS PRESS
PI AMSTERDAM
PA NIEUWE HEMWEG 6B, 1013 BG AMSTERDAM, NETHERLANDS
SN 0926-9630
BN 978-1-60750-017-9
J9 STUD HEALTH TECHNOL
PY 2009
VL 144
BP 223
EP 229
DI 10.3233/978-1-60750-017-9-223
PG 7
WC Psychology, Clinical; Computer Science, Cybernetics; Computer Science,
Interdisciplinary Applications; Health Policy & Services; Psychology;
Psychology, Social
SC Psychology; Computer Science; Health Care Sciences & Services
GA BKZ13
UT WOS:000269659900051
PM 19592768
ER
PT J
AU Mahowald, NM
Engelstaedter, S
Luo, C
Sealy, A
Artaxo, P
Benitez-Nelson, C
Bonnet, S
Chen, Y
Chuang, PY
Cohen, DD
Dulac, F
Herut, B
Johansen, AM
Kubilay, N
Losno, R
Maenhaut, W
Paytan, A
Prospero, JA
Shank, LM
Siefert, RL
AF Mahowald, Natalie M.
Engelstaedter, Sebastian
Luo, Chao
Sealy, Andrea
Artaxo, Paulo
Benitez-Nelson, Claudia
Bonnet, Sophie
Chen, Ying
Chuang, Patrick Y.
Cohen, David D.
Dulac, Francois
Herut, Barak
Johansen, Anne. M.
Kubilay, Nilgun
Losno, Remi
Maenhaut, Willy
Paytan, Adina
Prospero, Joseph A.
Shank, Lindsey M.
Siefert, Ronald L.
TI Atmospheric Iron Deposition: Global Distribution, Variability, and Human
Perturbations
SO ANNUAL REVIEW OF MARINE SCIENCE
SE Annual Review of Marine Science
LA English
DT Review; Book Chapter
DE aerosol deposition; climate change; deserts
ID NORTH-ATLANTIC OSCILLATION; AEROSOL OPTICAL DEPTH; LONG-RANGE TRANSPORT;
TIME-SERIES STATION; SUPPLY-AND-DEMAND; ICE CORE RECORDS; MINERAL DUST;
SAHARAN DUST; DESERT DUST; CLIMATE-CHANGE
AB Atmospheric inputs of iron to the open ocean are hypothesized to modulate ocean biogeochemistry. This review presents an integration of available observations of atmospheric iron and iron deposition, and also covers bioavailable iron distributions. Methods for estimating temporal variability in ocean deposition over the recent past are reviewed. Desert dust iron is estimated to represent 95% of the global atmospheric iron cycle, and combustion sources of iron are responsible for the remaining 5%. Humans may be significantly perturbing desert dust (up to 50%). The sources of bioavailable iron ire less well understood than those of iron, partly because we do not know what speciation of the iron is bioavailable. Bioavailable iron can derive from atmospheric processing of relatively insoluble desert dust iron or from direct emissions of soluble iron from combustion sources. These results imply that humans could be substantially impacting it-on and bioavailable iron deposition to ocean regions, but there are large uncertainties in our understanding.
C1 [Mahowald, Natalie M.; Engelstaedter, Sebastian; Luo, Chao] Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY 14853 USA.
[Mahowald, Natalie M.; Sealy, Andrea] Natl Ctr Atmospher Res, Boulder, CO 80307 USA.
[Artaxo, Paulo] Univ Sao Paulo, Inst Fis, BR-05508900 Sao Paulo, Brazil.
[Benitez-Nelson, Claudia] Univ S Carolina, Dept Geol Sci, Columbia, SC 29208 USA.
[Benitez-Nelson, Claudia] Univ S Carolina, Marine Sci Program, Columbia, SC 29208 USA.
[Bonnet, Sophie] Lab Oceanog Villefranche, UMR 7093, Villefranche Sur Mer, France.
[Chen, Ying] Trinity Consultants, Irvine, CA 92618 USA.
[Chuang, Patrick Y.] Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA.
[Cohen, David D.] Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia.
[Dulac, Francois] CEA Saclay, CEA CNRS UVSQ, UMR 1572, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France.
[Dulac, Francois; Losno, Remi] Univ Paris 12, CNRS UP12 UP7, UMR 7583, Lab Interuniv Syst Atmospher, Creteil, France.
[Herut, Barak] Natl Inst Oceanog, IL-31080 Haifa, Israel.
[Johansen, Anne. M.; Shank, Lindsey M.] Cent Washington Univ, Dept Chem, Ellensburg, WA 98926 USA.
[Kubilay, Nilgun] Middle E Tech Univ, Inst Marine Sci, Erdemli, Turkey.
[Maenhaut, Willy] Univ Ghent, Inst Nucl Sci, Dept Analyt Chem, B-9000 Ghent, Belgium.
[Paytan, Adina] Univ Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95064 USA.
[Prospero, Joseph A.] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33149 USA.
[Siefert, Ronald L.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
RP Mahowald, NM (reprint author), Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY 14853 USA.
EM mahowald@cornell.edu
RI Engelstaedter, Sebastian/A-9599-2009; bonnet, sophie/B-1627-2010;
Mahowald, Natalie/D-8388-2013; Maenhaut, Willy/M-3091-2013; Artaxo,
Paulo/E-8874-2010;
OI Mahowald, Natalie/0000-0002-2873-997X; Maenhaut,
Willy/0000-0002-4715-4627; Artaxo, Paulo/0000-0001-7754-3036; Sealy,
Andrea/0000-0001-8369-8851; Benitez-Nelson, Claudia/0000-0002-1004-5048;
Cohen, David/0000-0002-1209-9234; Prospero, Joseph/0000-0003-3608-6160
FU National Science Foundation [0758369]; NASA [NNG06G127G]
FX N.M. would like to acknowledge the support from the National Science
Foundation (0758369) and NASA (NNG06G127G). W.M. Would like to
acknowlege the Belgian Federal Science Policy Office for research
support.
NR 171
TC 229
Z9 235
U1 18
U2 153
PU ANNUAL REVIEWS
PI PALO ALTO
PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 USA
SN 1941-1405
EI 1941-0611
J9 ANNU REV MAR SCI
JI Annu. Rev. Mar. Sci.
PY 2009
VL 1
BP 245
EP 278
DI 10.1146/annurev.marine.010908.163727
PG 34
WC Geochemistry & Geophysics; Marine & Freshwater Biology; Oceanography
SC Geochemistry & Geophysics; Marine & Freshwater Biology; Oceanography
GA 463HH
UT WOS:000267421700011
PM 21141037
ER
PT J
AU Roesch, SC
Aldridge, AA
Vickers, RR
Helvig, LK
AF Roesch, Scott C.
Aldridge, Arianna A.
Vickers, Ross R., Jr.
Helvig, Linda K.
TI Testing personality-coping diatheses for negative and positive affect: a
longitudinal evaluation
SO ANXIETY STRESS AND COPING
LA English
DT Article
DE personality processes; five-factor model; coping; stress; multilevel
modeling
ID BIG 5 TRAITS; 5-FACTOR MODEL; EMOTIONAL REACTIVITY; DAILY STRESS;
NEUROTICISM; EXTROVERSION; STYLE; AGREEABLENESS; PREDICTION; EXPERIENCE
AB The current study examined how trait-consistent coping and trait-inconsistent coping were predictive of negative and positive affect. It was hypothesized that coping behaviors (e.g., social support) that were consistent with dimensions of the Five-Factor Model (FFM) of Personality (e.g., Extraversion) would be associated with positive affect, whereas traits that were inconsistent would be associated with negative affect. Longitudinal data from 673 military recruits revealed that dimensions of the FFM moderated the relationship between coping and affect. Individuals either high on Neuroticism, high on Agreeableness, or low on Conscientiousness who used more avoidance coping experienced more negative affect. Individuals high in Extraversion who used more approach coping and individuals low in Agreeableness who used more avoidance coping experienced more positive affect. The results are discussed with respect to the behavioral concordance model (BCM) (Cote Moskowitz, 1998) and the differential coping choice-effectiveness model (Bolger Zuckerman, 1995).
C1 [Roesch, Scott C.; Aldridge, Arianna A.] San Diego State Univ, San Diego, CA 92182 USA.
[Vickers, Ross R., Jr.; Helvig, Linda K.] USN, Hlth Res Ctr, San Diego, CA 92152 USA.
RP Roesch, SC (reprint author), San Diego State Univ, San Diego, CA 92182 USA.
EM scroesch@sciences.sdsu.edu
NR 45
TC 9
Z9 9
U1 3
U2 10
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1061-5806
J9 ANXIETY STRESS COPIN
JI Anxiety Stress Coping
PY 2009
VL 22
IS 3
BP 263
EP 281
AR PII 909164466
DI 10.1080/10615800802158419
PG 19
WC Neurosciences; Psychiatry; Psychology, Multidisciplinary
SC Neurosciences & Neurology; Psychiatry; Psychology
GA 434RA
UT WOS:000265290600002
PM 19253170
ER
PT B
AU Salem, TE
Urciuoli, DP
Green, R
Ovrebo, GK
AF Salem, T. E.
Urciuoli, D. P.
Green, R.
Ovrebo, G. K.
GP IEEE
TI High-Temperature High-Power Operation of a 100 A SiC DMOSFET Module
SO APEC: 2009 IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION,
VOLS 1- 4
LA English
DT Proceedings Paper
CT 24th Annual IEEE Applied Power Electronics Conference and Exposition
CY FEB 15-19, 2009
CL Washington, DC
SP IEEE
ID DEVICES; MOSFETS
AB The development of Silicon-Carbide (SiC) power electronic devices having high operating temperatures, high breakdown voltages and low losses has been widely researched over the past few decades. While devices such as the SiC junction barrier Schottky (JBS) rectifier are becoming available in the commercial marketplace, the SiC DMOSFET is less mature. Although continued research on material processing and device-level structures is necessary for optimization, new high performance 50 A SiC DMOSFETs have been fabricated. These MOSFETs have been identified as candidates to replace Si IGBTs in high-current high-temperature power modules for large hybrid electric vehicle propulsion systems. This paper reports on the performance of a 100 A SiC module comprised of two 50 A DMOSFETs. Experimental results are presented for the module in a DC-DC boost converter operated with external 75 A SiC JBS diodes at 17 kW output while using 90 degrees C liquid coolant.
C1 [Salem, T. E.] USN Acad, 105 Maryland Ave, Annapolis, MD 21402 USA.
[Urciuoli, D. P.; Green, R.; Ovrebo, G. K.] US Army Res Lab, Adelphi, MD 20783 USA.
RP Salem, TE (reprint author), USN Acad, 105 Maryland Ave, Annapolis, MD 21402 USA.
NR 15
TC 20
Z9 20
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2811-3
PY 2009
BP 653
EP +
DI 10.1109/APEC.2009.4802729
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA BKV19
UT WOS:000269315100105
ER
PT S
AU Vanhoy, JR
Hartley, DJ
Correll, FD
Moore, DM
Huddle, JR
AF Vanhoy, J. R.
Hartley, D. J.
Correll, F. D.
Moore, D. M.
Huddle, J. R.
BE McDaniel, FD
Doyle, BL
TI Accelerator-Based Laboratory Activities at USNA
SO APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 20th International Conference on Application of Accelerators in Research
and Industry
CY AUG 10-15, 2008
CL Ft Worth, TX
SP Univ N Texas, Sandia Natl Lab
DE Education; Accelerator; Resonance Reactions
AB The Naval Academy Tandem Accelerator Laboratory is dedicated to providing educational experiences for undergraduates. Students gain experience in accelerator operations, detector and data acquisition systems, nuclear structure and reaction mechanisms, and materials analysis techniques. Suggestions for managing the laboratory sessions are given. Examples introducing Coulomb excitation, resonance reactions, and depth profiling are described.
C1 [Vanhoy, J. R.; Hartley, D. J.; Correll, F. D.; Moore, D. M.; Huddle, J. R.] USN Acad, Dept Phys, Annapolis, MD 21402 USA.
RP Vanhoy, JR (reprint author), USN Acad, Dept Phys, 572C Holloway Rd, Annapolis, MD 21402 USA.
NR 13
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0633-9
J9 AIP CONF PROC
PY 2009
VL 1099
BP 214
EP 219
PG 6
WC Physics, Applied; Spectroscopy
SC Physics; Spectroscopy
GA BJH43
UT WOS:000265828500051
ER
PT S
AU Correll, FD
Cole, LK
Slater, CJ
Vanhoy, JR
Fithian, CH
AF Correll, Francis D.
Cole, Lord K.
Slater, Charles J.
Vanhoy, Jeffrey R.
Fithian, Charles H.
BE McDaniel, FD
Doyle, BL
TI PIXE Analysis of Metal Hull Bolts From HMB DeBraak
SO APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 20th International Conference on Application of Accelerators in Research
and Industry
CY AUG 10-15, 2008
CL Ft Worth, TX
SP Univ N Texas, Sandia Natl Lab
DE PIXE; Copper Alloys; Cultural heritage; Naval Archaeology; Shipwrecks
ID COPPER
AB HMB DeBraak was a 16-gun British brig-sloop that sank in a squall on May 25, 1798 off Cape Henlopen, Delaware. Silt covered the wooden hull shortly after it sank, preserving it until DeBraak was raised in 1986. The items recovered from the ship include metal bolts that held the hull together. We used PIXE to measure the compositions of 45 of the bolts and found that they are nearly pure copper (98.3% on average), with most also containing small amounts of iron (0.87%), nickel (0.039%), arsenic (0.43%), silver (0.089%), lead (0.18%), and bismuth (0.12%). A few contain a little indium, tin, or antimony, but none contain zinc above the quantization level. The compositions are similar to those reported for 18th-century English copper, but different from several copper alloys also used to make hull bolts. We conclude that, when DeBraak was last fitted out in 1795 - 1797, the Royal Navy was still using bolts similar to William Forbes's mechanically hardened pure copper bolts. Forbes's process represents the successful innovation and application of new technology in Royal Navy ships during the wars of the late 18th century.
C1 [Correll, Francis D.; Cole, Lord K.; Slater, Charles J.; Vanhoy, Jeffrey R.] USN Acad, Dept Phys, Annapolis, MD 21402 USA.
RP Correll, FD (reprint author), USN Acad, Dept Phys, 572C Holloway Rd, Annapolis, MD 21402 USA.
NR 11
TC 0
Z9 0
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0633-9
J9 AIP CONF PROC
PY 2009
VL 1099
BP 265
EP 268
PG 4
WC Physics, Applied; Spectroscopy
SC Physics; Spectroscopy
GA BJH43
UT WOS:000265828500061
ER
PT S
AU He, JH
Carosella, CA
Hubler, GK
Knies, DL
Qadri, SB
Grabowski, KS
AF He, J. H.
Carosella, C. A.
Hubler, G. K.
Knies, D. L.
Qadri, S. B.
Grabowski, K. S.
BE McDaniel, FD
Doyle, BL
TI Dynamical Structures in Phase-Separated Films Deposited under Ion
Bombardment
SO APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 20th International Conference on Application of Accelerators in Research
and Industry
CY AUG 10-15, 2008
CL Ft Worth, TX
SP Univ N Texas, Sandia Natl Lab
DE self-organization; phase separation; ion bombardment
ID BEAM-ASSISTED DEPOSITION
AB We report our experimental observation of ion bombardment effect on the film structures generated by co-evaporation of Au and silica. Three states are identified depending on the incident ion energy and beam current. Moderate ion bombardment creates nanoscale compositional modulations along the film growth direction. Strong ion bombardment induces disappearance of the compositional modulations. At still higher energy and flux, energetic ions sputter away all deposited atoms. The observed phenomena reflect synergistic effects of ion bombardment on the film growth in phase separated systems. Our observations suggest that ion beams can be employed to control the film structures in the deposition of phase-separated films.
C1 [He, J. H.; Carosella, C. A.; Hubler, G. K.; Knies, D. L.; Qadri, S. B.; Grabowski, K. S.] USN, Res Lab, Washington, DC 20375 USA.
RP He, JH (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM jhe@ccs.nrl.navy.mil
OI Grabowski, Kenneth/0000-0003-0816-001X
NR 14
TC 0
Z9 0
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0633-9
J9 AIP CONF PROC
PY 2009
VL 1099
BP 516
EP 519
PG 4
WC Physics, Applied; Spectroscopy
SC Physics; Spectroscopy
GA BJH43
UT WOS:000265828500112
ER
PT S
AU Papanicolaou, NC
Christov, CI
Jordan, PM
AF Papanicolaou, N. C.
Christov, C. I.
Jordan, P. M.
BE Todorov, MD
Christov, CI
TI Two-Gradient Convection in a Vertical Slot with Maxwell-Cattaneo Heat
Conduction
SO APPLICATION OF MATHEMATICS IN TECHNICAL AND NATURAL SCIENCES
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 1st International Conference on Application of Mathematics in Technical
and Natural Sciences
CY JUN 22-27, 2009
CL Sozopol, BULGARIA
SP Euro Amer Consortium Promoting Applicat Math Tech & Nat Sci
DE Maxwell-Cattaneo law of heat conduction; two-gradient convection;
g-jitter; beam functions
ID GRAVITY MODULATION; NONLINEAR DYNAMICS; WAVES; INSTABILITY
AB We study the effect of the Maxwell-Cattaneo law of heat conduction (MCHC) on the ID flow in a vertical slot subject to both vertical and horizontal temperature gradients. The gravitational acceleration is allowed to oscillate, which provides an opportunity to investigate the quantitative contribution of thermal inertia as epitomized by MCHC. The addition of the time derivative in MCHC increases the order of the system. We use a spectral expansion with Rayleigh's beam functions as the basis set, which is especially suited to fourth order boundary value problems (BVP). We show that the time derivative (relaxation of the thermal flux) has a dissipative nature and leads to the appearance of purely real negative eigenvalues. Yet it also increases the absolute value of the imaginary part and decreases the absolute value of the real part of the complex eigenvalues. Thus, the system has a somewhat more oscillatory behavior than the one based on Fourier's heat conduction law (FHC).
C1 [Papanicolaou, N. C.] Univ Nicosia, Dept Comp Sci, POB 24005, CY-1700 Nicosia, Cyprus.
[Christov, C. I.] Univ Louisiana Lafayette, Dept Math, Lafayette, LA 70504 USA.
[Jordan, P. M.] Entropy Reversal Consultants LLC, Abita Springs, LA 70420 USA.
[Jordan, P. M.] Naval Res Lab, Code 7181, Stennis Space Ctr, MS 39529 USA.
RP Papanicolaou, NC (reprint author), Univ Nicosia, Dept Comp Sci, POB 24005, CY-1700 Nicosia, Cyprus.
RI Christov, Christo/C-1081-2008
FU ASEE/ONR Summer Faculty Fellowship
FX The work of C.I.C. was supported, in part, by an ASEE/ONR Summer Faculty
Fellowship.
NR 15
TC 4
Z9 4
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0752-7
J9 AIP CONF PROC
PY 2009
VL 1186
BP 231
EP +
PG 3
WC Mathematics, Applied; Physics, Applied
SC Mathematics; Physics
GA BQA05
UT WOS:000280467600022
ER
PT J
AU Everhart, SS
Martinez-Vazquez, J
Mcnab, RM
AF Everhart, Stephen S.
Martinez-Vazquez, Jorge
McNab, Robert M.
TI Corruption, governance, investment and growth in emerging markets
SO APPLIED ECONOMICS
LA English
DT Article
ID ECONOMIC-GROWTH; TRANSMISSION CHANNELS; UNOFFICIAL ECONOMY;
CROSS-SECTION; PANEL-DATA; MODEL; TESTS; SPECIFICATION; ECONOMETRICS;
QUALITY
AB The article investigates the potential impact of corruption on economic growth by examining the effect that corruption may have on several significant determinants of economic growth, namely, investment in human, private and public capital, and on governance. Our theoretical approach allows for corruption to influence economic growth directly and indirectly through different investment and governance channels. All previous empirical work on this issue has been based on national income and product accounts (NIPA) data, which do not normally break down gross domestic investment into its private and public sector, and if they do, they misclassify investment by public enterprises as private investment, potentially biasing empirical findings. In this article we use a data set from the International Finance Corporation that bypasses these problems. We find that the impact of corruption on the level of public investment appears to be more ambiguous than it has been found in the previous literature. We, however, find that the impact of corruption on the accumulation of private capital is significantly more damaging than what has been previously found. We also find that the impact of corruption on governance is unambiguously negative, which further deters economic growth.
C1 [Everhart, Stephen S.] Corp 1100, Overseas Private Investment, Washington, DC 20527 USA.
[Martinez-Vazquez, Jorge] Georgia State Univ, Andrew Young Sch Policy Studies, Econ Dept & Int Studies Program, Atlanta, GA 30303 USA.
[McNab, Robert M.] Defense Resources Management Inst & Naval Postgra, Monterey, CA 93943 USA.
NR 73
TC 11
Z9 11
U1 3
U2 13
PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXFORDSHIRE, ENGLAND
SN 0003-6846
J9 APPL ECON
JI Appl. Econ.
PY 2009
VL 41
IS 13
BP 1579
EP 1594
AR PII 789127651
DI 10.1080/00036840701439363
PG 16
WC Economics
SC Business & Economics
GA 445WC
UT WOS:000266081200002
ER
PT J
AU Chu, PC
AF Chu, Peter C.
TI Mine Impact Burial Prediction From One to Three Dimensions
SO APPLIED MECHANICS REVIEWS
LA English
DT Review
DE mine impact burial prediction; Kirchhoff-Kelvin equation; IBPM;
IMPACT25/28; IMPACT35; drag and lift forces and torques; translation
velocity; orientation; burial depth; sediment dynamics; triple
coordinate system; mine shape effect; cylindrical mine; Manta mine;
Rockan mine
ID FALLING CYLINDER; WATER COLUMN; DYNAMICS
AB Tire Navy's mine impact burial prediction model creates a time history (if a cylindrical or a noncylindrical mine as it falls through air, water and sediment. The output of the model is the predicted mine trajectory in air and water columns, burial depth/orientation in sediment, as well as height, area, and volume protruding. Model inputs consist of parameters of environment, mine characteristics, and initial release. This paper reviews near three decades' effort on model development from one to three dimensions: (1) one-dimensional models predict the vertical position of the mines center of mass (COM) with the assumption of constant falling angle, (2) two-dimensional models predict the COM position in the (x, z) plane and the rotation around the y-axis, and (3) three-dimensional models predict tire COM position in the (x, y, z)space and the rotation around the x-, y-, and z-axes. These models are verified using the data collected from mine impact burial experiments. The one-dimensional model only solves one momentum equation (in the z-direction). It cannot predict the mine trajectory and burial depth well. The two-dimensional model restricts the mine motion in the (x, z) plane (which requires motionless for the environmental fluids) and uses incorrect drag coefficients and inaccurate sediment dynamics. The prediction errors are large in the mine trajectory and burial depth prediction (six to ten times larger than the observed depth in sand bottom of the Monterey Bay). The three-dimensional model predicts the trajectory and burial depth relatively well for cylindrical, near-cylindrical mines, and operational mines such as Manta and Rockan mines. [DOI: 10.1115/1.3013823]
C1 USN, Postgrad Sch, Naval Ocean Anal & Predict Lab, Monterey, CA 93943 USA.
RP Chu, PC (reprint author), USN, Postgrad Sch, Naval Ocean Anal & Predict Lab, Monterey, CA 93943 USA.
EM pcchu@nps.edu
FU Office of Naval Research Coastal Geosciences Program [N0001403WR20178,
N0001404WR20067]; Naval Oceanographic Office; Naval Postgraduate School
FX The Office of Naval Research Coastal Geosciences Program
(N0001403WR20178, N0001404WR20067), the Naval Oceanographic Office, and
the Naval Postgraduate School supported this study. The author was
benefited from the discussion with Mr. Brian Almquist at the Office of
Naval Research, RAML (retired) Rick Williams, Mr. Chenwu Fan at the
Naval Postgraduate School, CAPT James Berdegues and CAPT Robert Kiser at
the Commander Naval Meteorology and Oceanography Command (CNMOC), Mr.
Ronald Betsch, Dr. Peter Fleischer, and Mr. Steven Haeger at the Naval
Oceanographic Office, Dr. Phil Valent, Dr. Michael Richardson, Dr. Paul
Elmore, Dr. Ted Holland, and Dr. Andrei Abelev at the Naval Research
Laboratory at Stennis Space Center, and Dr. Thomas Weaver at the German
Federal Armed Forces Underwater Acoustic and Marine Geophysics Research
Institute. Comments from Professor Firdaus Udwadia at the University of
Southern California and an anonymous reviewer are extremely useful for
improvement of the manuscript.
NR 50
TC 4
Z9 4
U1 0
U2 7
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0003-6900
J9 APPL MECH REV
JI Appl. Mech. Rev.
PD JAN
PY 2009
VL 62
IS 1
AR 010802
DI 10.1115/1.3013823
PG 25
WC Mechanics
SC Mechanics
GA 540MV
UT WOS:000273337400002
ER
PT J
AU Cilento, BW
Johnson, CM
AF Cilento, Benjamin W.
Johnson, Calvin M., Jr.
TI The Case for Open Forehead Rejuvenation A Review of 1004 Procedures
SO Archives of Facial Plastic Surgery
LA English
DT Article
ID LIFT; BROW
AB Objective: To review the role of open forehead procedures in upper-face rejuvenation.
Methods: The clinical records of consecutive patients undergoing a coronal or trichophytic brow-lift from July 1, 1993, to June 30, 2005, were reviewed. Patient demographics and complication rates were tabulated and compared with published rates for endoscopic brow-lifts. Patient questionnaires were sent to correlate subjective outcome measures with objective clinical record data. To obtain population-based perceptions, 200 women aged 30 to 70 years were surveyed at a local mall.
Results: A total of 628 coronal and 376 trichophytic forehead-lifts were performed for which there were clinical records. There were 6 revisions (0.57%), no hematomas, 12 cases of permanent numbness (1.20%), 7 cases of permanent alopecia (0.70%), and no cases of permanent frontal branch weakness. The adjusted response rate for the questionnaire was 64.0% (416 of 650).
Conclusions: Open procedures in this series had a complication rate equal to or lower than published rates in endoscopic brow-lift series. Open brow-lift procedures are an effective means of upper-face rejuvenation and, when performed correctly, demonstrate high rates of patient satisfaction.
C1 [Cilento, Benjamin W.] USN, Med Ctr, Dept Otolaryngol, Portsmouth, VA 23708 USA.
[Johnson, Calvin M., Jr.] Hedgewood Surg Ctr, New Orleans, LA USA.
RP Cilento, BW (reprint author), USN, Med Ctr, Dept Otolaryngol, 620 John Paul Jones Cir, Portsmouth, VA 23708 USA.
EM bencilento@mac.com
NR 19
TC 10
Z9 11
U1 0
U2 1
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 JAN-FEB
PY 2009
VL 11
IS 1
BP 13
EP 17
PG 5
WC Surgery
SC Surgery
GA 395XN
UT WOS:000262556900002
PM 19153287
ER
PT B
AU Provencher, MT
Solomon, DJ
Gaston, TM
AF Provencher, Matthew T.
Solomon, Daniel J.
Gaston, Tistia M.
BE David, TS
Andrews, JR
TI Positioning for Shoulder Arthroscopy Beach Chair and Lateral Decubitus
SO ARTHROSCOPIC TECHNIQUES OF THE SHOULDER: A VISUAL GUIDE
SE Visual Arthroscopy Series
LA English
DT Article; Book Chapter
ID AXILLARY NERVE; INTERSCALENE BLOCK; JOINT CAPSULE; SURGERY;
COMPLICATIONS
C1 [Provencher, Matthew T.; Solomon, Daniel J.; Gaston, Tistia M.] USN, San Diego Med Ctr, San Diego, CA 92152 USA.
RP Provencher, MT (reprint author), USN, San Diego Med Ctr, San Diego, CA 92152 USA.
NR 19
TC 1
Z9 1
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-55642-838-8
J9 VIS ARTHROSC SER
PY 2009
BP 1
EP 14
PG 14
WC Orthopedics
SC Orthopedics
GA BKC77
UT WOS:000267777600001
ER
PT J
AU Cockell, CS
Leger, A
Fridlund, M
Herbst, TM
Kaltenegger, L
Absil, O
Beichman, C
Benz, W
Blanc, M
Brack, A
Chelli, A
Colangeli, L
Cottin, H
du Foresto, FC
Danchi, WC
Defrere, D
den Herder, JW
Eiroa, C
Greaves, J
Henning, T
Johnston, KJ
Jones, H
Labadie, L
Lammer, H
Launhardt, R
Lawson, P
Lay, OP
LeDuigou, JM
Liseau, R
Malbet, F
Martin, SR
Mawet, D
Mourard, D
Moutou, C
Mugnier, LM
Ollivier, M
Paresce, F
Quirrenbach, A
Rabbia, YD
Raven, JA
Rottgering, HJA
Rouan, D
Santos, NC
Selsis, F
Serabyn, E
Shibai, H
Tamura, M
Thiebaut, E
Westall, F
White, GJ
AF Cockell, C. S.
Leger, A.
Fridlund, M.
Herbst, T. M.
Kaltenegger, L.
Absil, O.
Beichman, C.
Benz, W.
Blanc, M.
Brack, A.
Chelli, A.
Colangeli, L.
Cottin, H.
du Foresto, F. Coude
Danchi, W. C.
Defrere, D.
den Herder, J. -W.
Eiroa, C.
Greaves, J.
Henning, T.
Johnston, K. J.
Jones, H.
Labadie, L.
Lammer, H.
Launhardt, R.
Lawson, P.
Lay, O. P.
LeDuigou, J. -M.
Liseau, R.
Malbet, F.
Martin, S. R.
Mawet, D.
Mourard, D.
Moutou, C.
Mugnier, L. M.
Ollivier, M.
Paresce, F.
Quirrenbach, A.
Rabbia, Y. D.
Raven, J. A.
Rottgering, H. J. A.
Rouan, D.
Santos, N. C.
Selsis, F.
Serabyn, E.
Shibai, H.
Tamura, M.
Thiebaut, E.
Westall, F.
White, G. J.
TI Darwin-A Mission to Detect and Search for Life on Extrasolar Planets
SO ASTROBIOLOGY
LA English
DT Review
DE Darwin; Extrasolar planets; Orbital telescopes; M stars; Earth-like
planets; Interferometry
ID EARTH-LIKE PLANETS; IN HABITABLE ZONES; HIGH-RESOLUTION SIMULATIONS;
EJECTION CME ACTIVITY; MAIN-SEQUENCE STARS; MASS M-STARS; NULLING
INTERFEROMETERS; SPECTRAL SIGNATURES; SYNTHETIC SPECTRA; TERRESTRIAL
ATMOSPHERES
AB The discovery of extrasolar planets is one of the greatest achievements of modern astronomy. The detection of planets that vary widely in mass demonstrates that extrasolar planets of low mass exist. In this paper, we describe a mission, called Darwin, whose primary goal is the search for, and characterization of, terrestrial extrasolar planets and the search for life. Accomplishing the mission objectives will require collaborative science across disciplines, including astrophysics, planetary sciences, chemistry, and microbiology. Darwin is designed to detect rocky planets similar to Earth and perform spectroscopic analysis at mid-infrared wavelengths (6-20 mu m), where an advantageous contrast ratio between star and planet occurs. The baseline mission is projected to last 5 years and consists of approximately 200 individual target stars. Among these, 25-50 planetary systems can be studied spectroscopically, which will include the search for gases such as CO2, H2O, CH4, and O-3. Many of the key technologies required for the construction of Darwin have already been demonstrated, and the remainder are estimated to be mature in the near future. Darwin is a mission that will ignite intense interest in both the research community and the wider public.
C1 [Cockell, C. S.] Open Univ, CEPSAR, Milton Keynes MK7 6AA, Bucks, England.
[Leger, A.; Ollivier, M.] Univ Paris 11, Inst Astrophys Spatiale, Orsay, France.
[Fridlund, M.] European Space Agcy, Estec, Astrophys Miss Div, NL-2200 AG Noordwijk, Netherlands.
[Herbst, T. M.; Henning, T.; Labadie, L.; Launhardt, R.] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Kaltenegger, L.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Absil, O.; Chelli, A.; Malbet, F.] Univ Grenoble 1, CNRS, Astrophys Lab, Grenoble, France.
[Beichman, C.] CALTECH, Michelson Sci Ctr, Pasadena, CA 91125 USA.
[Benz, W.] Univ Bern, Inst Phys, Bern, Switzerland.
[Blanc, M.] Observ Midi Pyrenees, F-31400 Toulouse, France.
[Brack, A.] CNPS, Ctr Biophys Mol, Orleans, France.
[Colangeli, L.] Osserv Astron Capodimonte, INAF, I-80131 Naples, Italy.
[Cottin, H.] Univ Paris 12, Lab Interuniv Syst Atmospher, Creteil, France.
[Cottin, H.] Univ Paris 07, CNRS, Creteil, France.
[du Foresto, F. Coude] Observ Paris, LESIA, Meudon, France.
[Danchi, W. C.] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
[Defrere, D.] Inst Astrophys & Geophys Liege, Liege, Belgium.
[den Herder, J. -W.] SRON, Netherlands Inst Space Res, Utrecht, Netherlands.
[Eiroa, C.] Univ Autonoma Madrid, Dept Fis Teor C11, Fac Ciencas, Madrid, Spain.
[Greaves, J.] Univ St Andrews Phys & Astron, St Andrews, Fife, Scotland.
[Johnston, K. J.] USN Observ, Washington, DC 20392 USA.
[Jones, H.] Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England.
[Lammer, H.] Austrian Acad Sci, Space Res Inst, A-8010 Graz, Austria.
[Lawson, P.; Lay, O. P.; Martin, S. R.; Mawet, D.; Serabyn, E.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
[LeDuigou, J. -M.] Ctr Natl Etud Spatiales, Dept Opt, F-31055 Toulouse, France.
[Liseau, R.] Chalmers, Onsala Space Observ, S-43900 Onsala, Sweden.
[Mourard, D.; Rabbia, Y. D.] Observ Cote Azur, Grasse, France.
[Moutou, C.] CNRS, LAM, Marseille, France.
[Mugnier, L. M.] ONERA DOTA, Chatillon, France.
[Paresce, F.] INAF, IASF Bologna, Bologna, Italy.
[Quirrenbach, A.] Univ Heidelberg, ZAH, Heidelberg, Germany.
[Raven, J. A.] Univ Dundee, SCRI, Div Plant Sci, Dundee, Scotland.
[Rottgering, H. J. A.] Leiden Univ, Leiden Observ, Leiden, Netherlands.
[Rouan, D.] Observ Paris, PHASE, LESIA, Meudon, France.
[Santos, N. C.] Univ Porto, Ctr Astrofis, P-4100 Oporto, Portugal.
[Selsis, F.] Univ Lyon, Ecole Super Lyon, CNRS, UMR 5574,CRAL, Lyon, France.
[Shibai, H.] Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648601, Japan.
[Tamura, M.] Natl Astron Observ, Tokyo 181, Japan.
[Thiebaut, E.] Univ Lyon 1, F-69622 Villeurbanne, France.
[Thiebaut, E.] Ecole Normale Super Lyon, Observ Lyon, Ctr Rech Astron Lyon, F-69364 Lyon, France.
[Westall, F.] CNRS, Ctr Biophys Mol, Orleans, France.
[White, G. J.] Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England.
[White, G. J.] Rutherford Appleton Lab, CCLRC, Space Sci & Technol Dept, Didcot OX11 0QX, Oxon, England.
RP Cockell, CS (reprint author), Open Univ, CEPSAR, Milton Keynes MK7 6AA, Bucks, England.
EM c.s.cockell@open.ac.uk
RI Appourchaux, Thierry/F-4692-2010; Santos, Nuno/E-9957-2011; Mugnier,
Laurent/A-7630-2012; Cottin, Herve/H-5654-2013;
OI Santos, Nuno/0000-0003-4422-2919; Cottin, Herve/0000-0001-9170-5265;
Mugnier, Laurent/0000-0002-8364-4957; Absil, Olivier/0000-0002-4006-6237
NR 126
TC 56
Z9 57
U1 2
U2 23
PU MARY ANN LIEBERT INC
PI NEW ROCHELLE
PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA
SN 1531-1074
J9 ASTROBIOLOGY
JI Astrobiology
PD JAN-FEB
PY 2009
VL 9
IS 1
BP 1
EP 22
DI 10.1089/ast.2007.0227
PG 22
WC Astronomy & Astrophysics; Biology; Geosciences, Multidisciplinary
SC Astronomy & Astrophysics; Life Sciences & Biomedicine - Other Topics;
Geology
GA 430GR
UT WOS:000264977400001
PM 19203238
ER
PT J
AU Zuccarello, F
Romano, P
Farnik, F
Karlicky, M
Contarino, L
Battiato, V
Guglielmino, SL
Comparato, M
Ugarte-Urra, I
AF Zuccarello, F.
Romano, P.
Farnik, F.
Karlicky, M.
Contarino, L.
Battiato, V.
Guglielmino, S. L.
Comparato, M.
Ugarte-Urra, I.
TI The X17.2 flare occurred in NOAA 10486: an example of filament
destabilization caused by a domino effect
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE Sun: activity; Sun: flares; Sun: magnetic fields; Sun: filaments
ID OCTOBER 28; MAGNETIC RECONNECTION; SOLAR-FLARE; H-ALPHA; FIELD;
EJECTION; EVENT; MODEL; DISK; PROMINENCES
AB Context. It is now possible to distinguish between two main models describing the mechanisms responsible for eruptive flares : the standard model, which assumes that most of the energy is released, by magnetic reconnection, in the region hosting the core of a sheared magnetic field, and the breakout model, which assumes reconnection occurs at first in a magnetic arcade overlaying the eruptive features.
Aims. We analyze the phenomena observed in NOAA 10486 before and during an X17.2 flare that occurred on 2003 October 28, to study the relationship between the pre-flare and flare phases and determine which model is the most suitable for interpreting this event. Methods. We performed an analysis of multiwavelength data set available for the event using radio data (0.8-4.5 GHz), images in the visible range (WL and H(alpha)), EUV images (1600 and 195 angstrom), and X-ray data, as well as MDI longitudinal magnetograms. We determined the temporal sequence of events occurring before and during the X17.2 flare and the magnetic field configuration in the linear force-free field approximation.
Results. The active region was characterized by a multiple arcade configuration and the X17.2 flare was preceded, by similar to 2 h, by the partial eruption of one filament. This eruption caused reconnection at null points located in the low atmosphere and a decrease in magnetic tension in the coronal field lines overlaying other filaments present in the active region. As a consequence, these filaments were destabilized and the X17.2 flare occurred.
Conclusions. The phenomena observed in NOAA 10486 before and during the X17.2 flare cannot be explained by a simple scenario such as the standard or breakout model, but instead in terms of a so-called domino effect, involving a sequence of destabilizing processes that triggered the flare.
C1 [Zuccarello, F.; Guglielmino, S. L.; Comparato, M.] Univ Catania, Dipartimento Fis & Astron, Sez Astrofis, I-95123 Catania, Italy.
[Romano, P.; Contarino, L.; Battiato, V.] INAF Osservatorio Astrofis Catania, I-95123 Catania, Italy.
[Farnik, F.; Karlicky, M.] Acad Sci Czech Republic, Inst Astron, CS-25165 Ondrejov, Czech Republic.
[Ugarte-Urra, I.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Zuccarello, F (reprint author), Univ Catania, Dipartimento Fis & Astron, Sez Astrofis, Via S Sofia 78, I-95123 Catania, Italy.
EM fzu@oact.inaf.it
RI Ugarte-Urra, Ignacio/B-1241-2009; Guglielmino, Salvo/H-3388-2012;
Farnik, Frantisek/G-9010-2014; Karlicky, Marian/G-9023-2014; Zuccarello,
Francesca/R-1834-2016;
OI Guglielmino, Salvo/0000-0002-1837-2262; Zuccarello,
Francesca/0000-0003-1853-2550; Ugarte-Urra, Ignacio/0000-0001-5503-0491;
Romano, Paolo/0000-0001-7066-6674
FU Istituto Nazionale di Astrofisica ( INAF); Catania University; Agenzia
Spaziale Italiana [I/035/05/0]; European Commission
[MRTN-CT-2006-035484]; Agency of the Academy of Sciences of the Czech
Republic [IAA300030701]
FX The authors wish to thank the referee for her/his comments and
suggestions, which led to a sounder version of the manuscript. Thanks
are also due to E. Catinoto and P. Costa for their cooperation in
acquiring WL and Ha images at the INAF-Catania Astrophysical
Observatory, to L. Vlahos for providing the code used to extrapolate the
force-free magnetic field and to Dr. H. Aurass for the 40-800 MHz
Potsdam-Trensdorf spectra. This work was supported by the Istituto
Nazionale di Astrofisica ( INAF), by the Catania University, by the
Agenzia Spaziale Italiana (contract I/035/05/0) and by the European
Commission through the SOLAIRE Network (MRTN-CT-2006-035484). This
research was also supported by Grant IAA300030701 of the Grant Agency of
the Academy of Sciences of the Czech Republic.
NR 39
TC 23
Z9 23
U1 1
U2 3
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD JAN
PY 2009
VL 493
IS 2
BP 629
EP 637
DI 10.1051/0004-6361:200809887
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 396OP
UT WOS:000262601300032
ER
PT J
AU Orlando, S
Drake, JJ
Laming, JM
AF Orlando, S.
Drake, J. J.
Laming, J. M.
TI Three-dimensional modeling of the asymmetric blast wave from the 2006
outburst of RS Ophiuchi: Early X-ray emission
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE shock waves; stars: binaries: symbiotic; stars: individual: RS Oph;
stars: novae, cataclysmic variables; X-rays: binaries
ID INTERSTELLAR GAS CLOUDS; ELECTRON THERMAL CONDUCTION;
SUPERNOVA-REMNANTS; RECURRENT NOVAE; SYMBIOTIC STARS; LIGHT-CURVE;
SHOCK-WAVE; SYSTEMS; HYDRODYNAMICS; SPECTROSCOPY
AB Context. Chandra/HETG observations of the recurrent nova RS Ophiuchi at day 13.9 of its 2006 outburst reveal a spectrum covering a large range in plasma temperature and characterized by asymmetric and blue-shifted emission lines (Nelson et al. 2008; Drake et al. 2008).
Aims. We investigate the origin of asymmetries and broadening of the emission lines observed with Chandra/HETG. We explore possible diagnostics of the early blast wave and of the circumstellar medium (CSM) in which the explosion occurred.
Methods. We perform 3D hydrodynamic simulations of the blast wave from the 2006 outburst, propagating through the inhomogeneous CSM. The model takes into account the thermal conduction (including the effects of heat flux saturation) and the radiative cooling. From the simulations, we synthesize the X-ray emission and derive the spectra as they would be observed with Chandra/HETG.
Results. The simulated nova remnant is highly aspherical and the blast wave is efficiently collimated by the inhomogeneous CSM. Our model reproduces the observed X-ray emission in a natural way if the CSM in which the outburst occurred is characterized by an equatorial density enhancement. Our "best-fit" model predicts that most of the early X-ray emission originates from a small region propagating in the direction perpendicular to the line-of-sight and localized just behind the interaction front between the blast wave and the equatorial density enhancement. The model predicts asymmetric and blue-shifted line profiles remarkably similar to those observed. These asymmetries are due to substantial X-ray absorption of red-shifted emission by ejecta material.
Conclusions. The comparison of high quality data of Chandra/HETG with detailed hydrodynamic modeling has allowed us to unveil, for the first time, the details of the structure emitting in the X-ray band in early phases of the outburst evolution, contributing to a better understanding of the physics of interactions between nova blasts and CSM in recurrent novae. This may have implications for whether or not RS Ophiuchi is a type Ia SN progenitor system.
C1 [Orlando, S.] INAF Osservatorio Astron Palermo GS Vaiana, I-90134 Palermo, Italy.
[Orlando, S.] Consorzio COMETA, I-95123 Catania, Italy.
[Drake, J. J.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Laming, J. M.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Orlando, S (reprint author), INAF Osservatorio Astron Palermo GS Vaiana, Piazza Parlamento 1, I-90134 Palermo, Italy.
EM orlando@astropa.inaf.it
OI Orlando, Salvatore/0000-0003-2836-540X
FU Ministry of University and Research (MIUR); Istituto Nazionale di
Astrofisica (INAF); Piano Operativo Nazionale "Ricerca Scientifica,
Sviluppo Tecnologico [20002006]
FX This work was supported in part by the Italian Ministry of University
and Research (MIUR) and by Istituto Nazionale di Astrofisica (INAF). The
software used in this work was in part developed by the DOEsupported
ASC/Alliance Center for Astrophysical Thermonuclear Flashes at the
University of Chicago, using modules for thermal conduction and
optically thin radiation built at the Osservatorio Astronomico di
Palermo. The simulations were executed on the Grid infrastructure of the
Consorzio COMETA. This work makes use of results produced by the PI2S2
Project managed by the Consorzio COMETA, a project co-funded by the
Italian Ministry of University and Research (MIUR) within the Piano
Operativo Nazionale "Ricerca Scientifica, Sviluppo Tecnologico, Alta
Formazione" (PON 20002006). More information is available at http://www.
pi2s2. it and http://www. consorzio-cometa. it.
NR 53
TC 24
Z9 24
U1 0
U2 1
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD JAN
PY 2009
VL 493
IS 3
BP 1049
EP 1059
DI 10.1051/0004-6361:200810109
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 397DA
UT WOS:000262641100024
ER
PT J
AU Raghavan, D
McAlister, HA
Torres, G
Latham, DW
Mason, BD
Boyajian, TS
Baines, EK
Williams, SJ
ten Brummelaar, TA
Farrington, CD
Ridgway, ST
Sturmann, L
Sturmann, J
Turner, NH
AF Raghavan, Deepak
McAlister, Harold A.
Torres, Guillermo
Latham, David W.
Mason, Brian D.
Boyajian, Tabetha S.
Baines, Ellyn K.
Williams, Stephen J.
ten Brummelaar, Theo A.
Farrington, Chris D.
Ridgway, Stephen T.
Sturmann, Laszlo
Sturmann, Judit
Turner, Nils H.
TI THE VISUAL ORBIT OF THE 1.1 DAY SPECTROSCOPIC BINARY sigma(2) CORONAE
BOREALIS FROM INTERFEROMETRY AT THE CHARA ARRAY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE binaries: spectroscopic; stars: fundamental parameters; stars:
individual (sigma(2) Coronae Borealis); techniques: interferometric
ID PROPER-MOTION STARS; SOLAR NEIGHBORHOOD; RADIAL-VELOCITIES; MULTIPLE
STARS; NEARBY STARS; F-DWARF; MASS; CALIBRATION; ASTROMETRY; ISOCHRONES
AB We present an updated spectroscopic orbit and a new visual orbit for the double-lined spectroscopic binary sigma(2) Coronae Borealis (CrB) based on radial velocity measurements at the Oak Ridge Observatory in Harvard, MA and interferometric visibility measurements at the Center for High Angular Resolution Astronomy (CHARA) Array on Mount Wilson in California. sigma(2) CrB is composed of two Sun-like stars of roughly equal mass in a circularized orbit with a period of 1.14 days. The long baselines of the CHARA Array have allowed us to resolve the visual orbit for this pair, the shortest-period binary yet resolved interferometrically, enabling us to determine component masses of 1.137 +/- 0.037 M-circle dot and 1.090 +/- 0.036 M-circle dot. We have also estimated absolute V-band magnitudes of M-V(primary) = 4.35 +/- 0.02 and M-V(secondary) = 4.74 +/- 0.02. A comparison with stellar evolution models indicates a relatively young age of 0.1-3 Gyr, consistent with the high-Li abundance measured previously. This pair is the central component of a quintuple system, along with another similar-mass star, sigma(1) CrB, in a similar to 730-year visual orbit, and a distant M-dwarf binary, sigma CrB C, at a projected separation of similar to 10'. We also present differential proper motion evidence to show that components C & D ( ADS 9979C & D) listed for this system in the Washington Double Star Catalog are optical alignments that are not gravitationally bound to the sigma CrB system.
C1 [Raghavan, Deepak; McAlister, Harold A.; Boyajian, Tabetha S.; Baines, Ellyn K.; Williams, Stephen J.] Georgia State Univ, Ctr High Angular Resolut Astron, Atlanta, GA 30302 USA.
[Torres, Guillermo; Latham, David W.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Mason, Brian D.] USN Observ, Washington, DC 20392 USA.
[ten Brummelaar, Theo A.; Farrington, Chris D.; Sturmann, Laszlo; Sturmann, Judit; Turner, Nils H.] Mt Wilson Observ, CHARA Array, Mt Wilson, CA 91023 USA.
[Ridgway, Stephen T.] Natl Opt Astron Observ, Tucson, AZ 85726 USA.
RP Raghavan, D (reprint author), Georgia State Univ, Ctr High Angular Resolut Astron, POB 3969, Atlanta, GA 30302 USA.
EM raghvan@chara.gsu.edu
FU College of Arts and Sciences at Georgia State University; National
Science Foundation (NSF) [AST-0606958, AST-0708229]; NASA [BLF5704]
FX We thank Andy Boden and Doug Gies for their many useful suggestions that
improved the quality of this work, and Richard Gray for making new
observations at our request to confirm the spectral typing of the
components. The CfA spectroscopic observations of sigma1 CrB
and sigma2 CrB used in this paper were obtained with the help
of J. Caruso, R.P. Stefanik, and J. Zajac. We also thank the CHARA Array
operator P.J. Goldfinger for obtaining some of the data used here and
for her able assistance of remote operations of the Array from AROC.
Research at the CHARA Array is supported by the College of Arts and
Sciences at Georgia State University and by the National Science
Foundation (NSF) through NSF grant AST-0606958. G.T. acknowledges
partial support for this work from NSF grant AST-0708229 and NASA's
MASSIF SIM Key Project (BLF5704). This research has made use of the
SIMBAD literature database, operated at Centre de Donnees Astronomiques
de Strasbourg, France, and of NASA's Astrophysics Data System. This
effort used multi-epoch images from the Digitized Sky Survey, which was
produced at the Space Telescope Science Institute under U.S. Government
grant NAG W-2166. This publication also made use of data products from
the 2MASS, which is a joint project of the University of Massachusetts
and the Infrared Processing and Analysis Center/California Institute of
Technology, funded by NASA and the NSF.
NR 48
TC 26
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U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 1
PY 2009
VL 690
IS 1
BP 394
EP 406
DI 10.1088/0004-637X/690/1/394
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 398IU
UT WOS:000262726600034
ER
PT J
AU Longcope, DW
Guidoni, SE
Linton, MG
AF Longcope, D. W.
Guidoni, S. E.
Linton, M. G.
TI GAS-DYNAMIC SHOCK HEATING OF POST-FLARE LOOPS DUE TO RETRACTION
FOLLOWING LOCALIZED, IMPULSIVE RECONNECTION
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE MHD; shock waves; Sun: flares
ID MAGNETIC-FLUX TUBES; WAVES; MODEL
AB We present a novel model in which field lines shortening after localized, three-dimensional reconnection heat the plasma as they compress it. The shortening progresses away from the reconnection site at the Alfven speed, releasing magnetic energy and generating parallel, compressive flows. These flows, which are highly supersonic when beta << 1, collide in a pair of strong gas-dynamic shocks at which both the mass density and temperature are raised. Reconnecting field lines initially differing by more that 100. can produce a concentrated knot of plasma hotter that 20 MK at the loop's apex, consistent with observations. In spite of these high temperatures, the shocks convert less than 10% of the liberated magnetic energy into heat-the rest remains as kinetic energy of bulk motion. These gas-dynamic shocks arise only when the reconnection is impulsive and localized in all three dimensions; they are distinct from the slow magnetosonic shocks of the Petschek steady-state reconnection model.
C1 [Longcope, D. W.; Guidoni, S. E.] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA.
[Linton, M. G.] USN, Res Lab, Washington, DC 20375 USA.
RP Longcope, DW (reprint author), Montana State Univ, Dept Phys, Bozeman, MT 59717 USA.
NR 22
TC 34
Z9 34
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD JAN 1
PY 2009
VL 690
IS 1
BP L18
EP L22
DI 10.1088/0004-637X/690/1/L18
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 398RB
UT WOS:000262748100005
ER
PT J
AU Dupuy, E
Walker, KA
Kar, J
Boone, CD
McElroy, CT
Bernath, PF
Drummond, JR
Skelton, R
McLeod, SD
Hughes, RC
Nowlan, CR
Dufour, DG
Zou, J
Nichitiu, F
Strong, K
Baron, P
Bevilacqua, RM
Blumenstock, T
Bodeker, GE
Borsdorff, T
Bourassa, AE
Bovensmann, H
Boyd, IS
Bracher, A
Brogniez, C
Burrows, JP
Catoire, V
Ceccherini, S
Chabrillat, S
Christensen, T
Coffey, MT
Cortesi, U
Davies, J
De Clercq, C
Degenstein, DA
De Maziere, M
Demoulin, P
Dodion, J
Firanski, B
Fischer, H
Forbes, G
Froidevaux, L
Fussen, D
Gerard, P
Godin-Beekmann, S
Goutail, F
Granville, J
Griffith, D
Haley, CS
Hannigan, JW
Hopfner, M
Jin, JJ
Jones, A
Jones, NB
Jucks, K
Kagawa, A
Kasai, Y
Kerzenmacher, TE
Kleinbohl, A
Klekociuk, AR
Kramer, I
Kullmann, H
Kuttippurath, J
Kyrola, E
Lambert, JC
Livesey, NJ
Llewellyn, EJ
Lloyd, ND
Mahieu, E
Manney, GL
Marshall, BT
McConnell, JC
McCormick, MP
McDermid, IS
McHugh, M
McLinden, CA
Mellqvist, J
Mizutani, K
Murayama, Y
Murtagh, DP
Oelhaf, H
Parrish, A
Petelina, SV
Piccolo, C
Pommereau, JP
Randall, CE
Robert, C
Roth, C
Schneider, M
Senten, C
Steck, T
Strandberg, A
Strawbridge, KB
Sussmann, R
Swart, DPJ
Tarasick, DW
Taylor, JR
Tetard, C
Thomason, LW
Thompson, AM
Tully, MB
Urban, J
Vanhellemont, F
Vigouroux, C
von Clarmann, T
von der Gathen, P
von Savigny, C
Waters, JW
Witte, JC
Wolff, M
Zawodny, JM
AF Dupuy, E.
Walker, K. A.
Kar, J.
Boone, C. D.
McElroy, C. T.
Bernath, P. F.
Drummond, J. R.
Skelton, R.
McLeod, S. D.
Hughes, R. C.
Nowlan, C. R.
Dufour, D. G.
Zou, J.
Nichitiu, F.
Strong, K.
Baron, P.
Bevilacqua, R. M.
Blumenstock, T.
Bodeker, G. E.
Borsdorff, T.
Bourassa, A. E.
Bovensmann, H.
Boyd, I. S.
Bracher, A.
Brogniez, C.
Burrows, J. P.
Catoire, V.
Ceccherini, S.
Chabrillat, S.
Christensen, T.
Coffey, M. T.
Cortesi, U.
Davies, J.
De Clercq, C.
Degenstein, D. A.
Maziere, M. De
Demoulin, P.
Dodion, J.
Firanski, B.
Fischer, H.
Forbes, G.
Froidevaux, L.
Fussen, D.
Gerard, P.
Godin-Beekmann, S.
Goutail, F.
Granville, J.
Griffith, D.
Haley, C. S.
Hannigan, J. W.
Hoepfner, M.
Jin, J. J.
Jones, A.
Jones, N. B.
Jucks, K.
Kagawa, A.
Kasai, Y.
Kerzenmacher, T. E.
Kleinboehl, A.
Klekociuk, A. R.
Kramer, I.
Kuellmann, H.
Kuttippurath, J.
Kyroelae, E.
Lambert, J. -C.
Livesey, N. J.
Llewellyn, E. J.
Lloyd, N. D.
Mahieu, E.
Manney, G. L.
Marshall, B. T.
McConnell, J. C.
McCormick, M. P.
McDermid, I. S.
McHugh, M.
McLinden, C. A.
Mellqvist, J.
Mizutani, K.
Murayama, Y.
Murtagh, D. P.
Oelhaf, H.
Parrish, A.
Petelina, S. V.
Piccolo, C.
Pommereau, J. -P.
Randall, C. E.
Robert, C.
Roth, C.
Schneider, M.
Senten, C.
Steck, T.
Strandberg, A.
Strawbridge, K. B.
Sussmann, R.
Swart, D. P. J.
Tarasick, D. W.
Taylor, J. R.
Tetard, C.
Thomason, L. W.
Thompson, A. M.
Tully, M. B.
Urban, J.
Vanhellemont, F.
Vigouroux, C.
von Clarmann, T.
von der Gathen, P.
von Savigny, C.
Waters, J. W.
Witte, J. C.
Wolff, M.
Zawodny, J. M.
TI Validation of ozone measurements from the Atmospheric Chemistry
Experiment (ACE)
SO ATMOSPHERIC CHEMISTRY AND PHYSICS
LA English
DT Review
ID MICROWAVE LIMB SOUNDER; GROUND-BASED FTIR; HALOGEN OCCULTATION
EXPERIMENT; STRATOSPHERIC OZONE; TECHNICAL NOTE; ERROR ANALYSIS;
POAM-III; SAGE-II; VERTICAL-DISTRIBUTION; OBSERVING SYSTEM
AB This paper presents extensive bias determination analyses of ozone observations from the Atmospheric Chemistry Experiment (ACE) satellite instruments: the ACE Fourier Transform Spectrometer (ACE-FTS) and the Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation (ACE-MAESTRO) instrument. Here we compare the latest ozone data products from ACE-FTS and ACE-MAESTRO with coincident observations from nearly 20 satellite-borne, airborne, balloon-borne and ground-based instruments, by analysing volume mixing ratio profiles and partial column densities. The ACE-FTS version 2.2 Ozone Update product reports more ozone than most correlative measurements from the upper troposphere to the lower mesosphere. At altitude levels from 16 to 44 km, the average values of the mean relative differences are nearly all within +1 to +8%. At higher altitudes (45 60 km), the ACE-FTS ozone amounts are significantly larger than those of the comparison instruments, with mean relative differences of up to +40% (about + 20% on average). For the ACE-MAESTRO version 1.2 ozone data product, mean relative differences are within +/- 10% (average values within +/- 6%) between 18 and 40 km for both the sunrise and sunset measurements. At higher altitudes (similar to 35-55 km), systematic biases of opposite sign are found between the ACE-MAESTRO sunrise and sunset observations. While ozone amounts derived from the ACE-MAESTRO sunrise occultation data are often smaller than the coincident observations (with mean relative differences down to -10%), the sunset occultation profiles for ACE-MAESTRO show results that are qualitatively similar to ACE-FTS, indicating a large positive bias (mean relative differences within +10 to +30%) in the 45-55 km altitude range. In contrast, there is no significant systematic difference in bias found for the ACE-FTS sunrise and sunset measurements.
C1 [Dupuy, E.; Walker, K. A.; Boone, C. D.; Bernath, P. F.; Skelton, R.; McLeod, S. D.; Hughes, R. C.] Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada.
[Walker, K. A.; Kar, J.; McElroy, C. T.; Drummond, J. R.; Nowlan, C. R.; Zou, J.; Nichitiu, F.; Strong, K.; Kerzenmacher, T. E.; Taylor, J. R.; Wolff, M.] Univ Toronto, Dept Phys, Toronto, ON, Canada.
[McElroy, C. T.; Davies, J.; McLinden, C. A.; Tarasick, D. W.] Environm Canada, Downsview, ON, Canada.
[Bernath, P. F.] Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England.
[Drummond, J. R.] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS, Canada.
[Dufour, D. G.] Picomole Instruments Inc, Edmonton, AB, Canada.
[Baron, P.; Kagawa, A.; Kasai, Y.; Mizutani, K.; Murayama, Y.] Natl Inst Informat & Commun Technol NICT, Koganei, Tokyo, Japan.
[Bevilacqua, R. M.] USN, Res Lab, Washington, DC 20375 USA.
[Blumenstock, T.; Fischer, H.; Hoepfner, M.; Kramer, I.; Oelhaf, H.; Schneider, M.; Steck, T.; von Clarmann, T.] Forschungszentrum Karlsruhe, Inst Meteorol & Klimaforsch, D-76021 Karlsruhe, Germany.
[Blumenstock, T.; Fischer, H.; Hoepfner, M.; Kramer, I.; Oelhaf, H.; Schneider, M.; Steck, T.; von Clarmann, T.] Univ Karlsruhe, Karlsruhe, Germany.
[Bodeker, G. E.] Natl Inst Water & Atmospher Res, Lauder, New Zealand.
[Borsdorff, T.; Sussmann, R.] Forschungszentrum Karlsruhe, Inst Meteorol & Klimaforsch Atmosphar Umweltforsc, Garmisch Partenkirchen, Germany.
[Bourassa, A. E.; Degenstein, D. A.; Llewellyn, E. J.; Lloyd, N. D.; Petelina, S. V.; Roth, C.] Univ Saskatchewan, Inst Space & Atmospher Studies, Saskatoon, SK S7N 0W0, Canada.
[Bovensmann, H.; Bracher, A.; Burrows, J. P.; Kleinboehl, A.; Kuellmann, H.; Kuttippurath, J.; von Savigny, C.] Univ Bremen, IUP, Bremen, Germany.
[Boyd, I. S.] Univ Massachusetts, NIWA Environm Res Inst, Amherst, MA 01003 USA.
[Brogniez, C.; Tetard, C.] Univ Lille 1, Opt Atmospher Lab, CNRS, F-59655 Villeneuve Dascq, France.
[Catoire, V.; Robert, C.] Univ Orleans, CNRS, Lab Phys & Chim Environm, Orleans, France.
[Ceccherini, S.; Cortesi, U.] CNR, Inst Fis Applicata N Carrara IFAC, Sesto Fiorentino, Italy.
[Chabrillat, S.; De Clercq, C.; Maziere, M. De; Dodion, J.; Fussen, D.; Gerard, P.; Granville, J.; Lambert, J. -C.; Senten, C.; Vanhellemont, F.; Vigouroux, C.] Inst Aeron Spatiale Belgique BIRA IASB, Brussels, Belgium.
[Christensen, T.] Danish Meteorol Inst, Danish Climate Ctr, Copenhagen, Denmark.
[Coffey, M. T.; Hannigan, J. W.] Natl Ctr Atmospher Res, Earth & Sun Syst Lab, Boulder, CO 80307 USA.
[Demoulin, P.; Mahieu, E.] Univ Liege, Inst Astrophys & Geophys, Liege, Belgium.
[Firanski, B.; Strawbridge, K. B.] Environm Canada, Ctr Atmospher Res Expt, Sci & Technol Branch, Egbert, ON, Canada.
[Forbes, G.] Environm Canada Sable Isl, Dartmouth, NS, Canada.
[Froidevaux, L.; Kleinboehl, A.; Livesey, N. J.; Manney, G. L.; Waters, J. W.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
[Godin-Beekmann, S.; Kuttippurath, J.] Univ Paris 06, CNRS, Serv Aeron, Paris, France.
[Goutail, F.; Pommereau, J. -P.] CNRS, Serv Aeron, F-91371 Verrieres Le Buisson, France.
[Griffith, D.; Jones, N. B.] Univ Wollongong, Sch Chem, Wollongong, NSW, Australia.
[Haley, C. S.] York Univ, Ctr Res Earth & Space Sci, Toronto, ON M3J 2R7, Canada.
[Jin, J. J.] York Univ, Dept Earth & Space Sci & Engn, Toronto, ON M3J 2R7, Canada.
[Jones, A.; Mellqvist, J.; Murtagh, D. P.; Strandberg, A.; Urban, J.] Chalmers, Dept Radio & Space Sci, S-41296 Gothenburg, Sweden.
[Jucks, K.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Kagawa, A.] Fujitsu FIP Corp, Tokyo, Japan.
[Klekociuk, A. R.] Australian Antarctic Div, Ice Ocean Atmosphere & Climate IOAC Program, Kingston, Australia.
[Kyroelae, E.] Finnish Meteorol Inst, Earth Observat, FIN-00101 Helsinki, Finland.
[Manney, G. L.] New Mexico Inst Min & Technol, Socorro, NM 87801 USA.
[Marshall, B. T.; McHugh, M.] GATS Inc, Newport News, VA USA.
[McCormick, M. P.; Thomason, L. W.; Zawodny, J. M.] NASA, Langley Res Ctr, Div Atmospher Sci, Hampton, VA 23665 USA.
[McDermid, I. S.] Table Mt Facil, Jet Prop Lab, Wrightwood, CA USA.
[Parrish, A.] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA.
[Petelina, S. V.] La Trobe Univ, Dept Phys, Bundoora, Vic 3086, Australia.
[Piccolo, C.] Univ Oxford, Oxford OX1 2JD, England.
[Randall, C. E.] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA.
[Swart, D. P. J.] Natl Inst Publ Hlth & Environm RIVM, Bilthoven, Netherlands.
[Thompson, A. M.] Penn State Univ, Dept Meteorol, University Pk, PA 16802 USA.
[Tully, M. B.] Bur Meteorol, Atmosphere Watch Sect, Melbourne, Vic, Australia.
[von der Gathen, P.] Alfred Wegener Inst Polar & Marine Res, Res Unit Potsdam, Potsdam, Germany.
[Witte, J. C.] Sci Syst & Applicat Inc, Lanham, MD USA.
[Witte, J. C.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Dupuy, E (reprint author), Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada.
RI Bracher, Astrid/B-7805-2013; Schneider, Matthias/B-1441-2013; von
Savigny, Christian/B-3910-2014; Kyrola, Erkki/E-1835-2014; Garmisch-Pa,
Ifu/H-9902-2014; Drummond, James/O-7467-2014; Catoire,
Valery/E-9662-2015; Jones, Nicholas/G-5575-2011; Murtagh,
Donal/F-8694-2011; Randall, Cora/L-8760-2014; Bovensmann,
Heinrich/P-4135-2016; Klekociuk, Andrew/A-4498-2015; Cortesi,
Ugo/D-2704-2012; Oelhaf, Hermann/A-7895-2013; von Clarmann,
Thomas/A-7287-2013; Urban, Jo/F-9172-2010; McLinden, Chris/A-7710-2010;
von der Gathen, Peter/B-8515-2009; Bernath, Peter/B-6567-2012; Strong,
Kimberly/D-2563-2012; Jin, Jianjun/G-8357-2012; Bodeker,
Greg/A-8870-2008; Blumenstock, Thomas/K-2263-2012; Sussmann,
Ralf/K-3999-2012; Hopfner, Michael/A-7255-2013; Burrows,
John/B-6199-2014; Thompson, Anne /C-3649-2014;
OI Bracher, Astrid/0000-0003-3025-5517; Catoire,
Valery/0000-0001-8126-3096; Jones, Nicholas/0000-0002-0111-2368;
Murtagh, Donal/0000-0003-1539-3559; Randall, Cora/0000-0002-4313-4397;
Bovensmann, Heinrich/0000-0001-8882-4108; Klekociuk,
Andrew/0000-0003-3335-0034; Cortesi, Ugo/0000-0002-2827-5239; von
Clarmann, Thomas/0000-0003-2219-3379; Urban, Jo/0000-0001-7026-793X;
McLinden, Chris/0000-0001-5054-1380; von der Gathen,
Peter/0000-0001-7409-1556; Bernath, Peter/0000-0002-1255-396X; Bodeker,
Greg/0000-0003-1094-5852; Hopfner, Michael/0000-0002-4174-9531; Burrows,
John/0000-0002-6821-5580; Thompson, Anne /0000-0002-7829-0920; Thomason,
Larry/0000-0002-1902-0840; Murayama, Yasuhiro/0000-0003-1129-334X;
Mahieu, Emmanuel/0000-0002-5251-0286; Mellqvist,
Johan/0000-0002-6578-9220; Tarasick, David/0000-0001-9869-0692
FU NSERC; CSA; CFCAS; ABB Bomem; Ontario Research and Development Challenge
Fund; Premier's Excellence Research Award; University of Toronto; NASA
[NNG05GN46G]
FX Work at the Toronto Atmospheric Observatory was supported by NSERC, CSA,
CFCAS, ABB Bomem, the Ontario Research and Development Challenge Fund,
the Premier's Excellence Research Award and the University of Toronto.;
Thanks to B. Bojkov of the Aura Validation Data Center (AVDC) and the
Aura-MLS Data Distribution Team for access to the Aura-MLS dataset (see
http://avdc.gsfc.nasa.gov). Work at the Jet Propulsion Laboratory (JPL),
California Institute of Technology (CalTech), is carried out under a
contract with NASA. Work at the University of Massachusetts is supported
by NASA under award No. NNG05GN46G.
NR 152
TC 63
Z9 63
U1 3
U2 27
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 1680-7316
EI 1680-7324
J9 ATMOS CHEM PHYS
JI Atmos. Chem. Phys.
PY 2009
VL 9
IS 2
BP 287
EP 343
PG 57
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 406WN
UT WOS:000263325700001
ER
PT J
AU Buzorius, G
AF Buzorius, G.
TI Technical Note: In-situ quantification of aerosol sources and sinks over
regional geographical scales
SO ATMOSPHERIC CHEMISTRY AND PHYSICS
LA English
DT Article
ID FLUX MEASUREMENTS; BOUNDARY-LAYER; DRY DEPOSITION; AIR-MOTION;
PARAMETERIZATION; ENVIRONMENT; EMISSIONS; AIRCRAFT; OCEAN; URBAN
AB In order to obtain the source/sink functions for atmospheric particulates located on the planetary surface or elevated in the atmosphere; direct aerosol emission measurements are required. For this purpose, the performance of an airborne aerosol flux measurement system with an improved 3-kilometer (km) spatial resolution is evaluated in this study. Eddy covariance method was used in flux calculations. A footprint for airborne flux sampling with the increased resolution becomes comparable in area to the footprint for tower sampling (with the footprint length being 2 to 10 km). The improvement in spatial resolution allows the quantification of emission rates from individual sources located several kilometers apart such as highway segments, city blocks, and remote and industrial areas. The advantage is a moving platform that allows scanning of aerosol emissions or depositions over regional geographic scales. Airborne flux measurements with the improved spatial resolution were conducted in various environments ranging from clean to partly polluted marine to polluted continental environment with low (< 500 m) mixed boundary layer heights. The upward and downward fluxes from the clean marine environment were smaller than 0.5x10(6) particles m(-2) s(-1) in absolute value. The effective emissions measured from a ship plume ranged from 2x10(8) to 3x10(8) m(-2) s(-1), and effective fluxes measured crossing cities plumes with populations of 10 000 to 12 000 inhabitants were in the range of 2x10(8) to 3x10(8) m(-2) s(-1). Correlations between heat and aerosol fluxes are evaluated.
C1 USN, Postgrad Sch, Dept Meteorol, Monterey, CA 93943 USA.
RP Buzorius, G (reprint author), USN, Postgrad Sch, Dept Meteorol, Monterey, CA 93943 USA.
EM gbuzoriu@nps.edu
FU NSF SGER [0634147]
FX This study was supported by NSF SGER grant # 0634147. Author is thankful
to S. Ramp from Naval Postgraduate School (NPS) for accommodating
aerosol flux study during the ASAP field campaign. Q. Wang (NPS) and J.
Kalogiros (NPS) are acknowledged for sharing post-processed wind speed
data. Author is grateful to N. Kljun for footprint estimates provided at
website http://footprint.kljun.net/contact.php.
NR 32
TC 0
Z9 0
U1 0
U2 2
PU COPERNICUS PUBLICATIONS
PI KATHLENBURG-LINDAU
PA MAX-PLANCK-STR 13, KATHLENBURG-LINDAU, 37191, GERMANY
SN 1680-7316
J9 ATMOS CHEM PHYS
JI Atmos. Chem. Phys.
PY 2009
VL 9
IS 14
BP 4869
EP 4878
PG 10
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 477RF
UT WOS:000268535500022
ER
PT J
AU Dunkerton, TJ
Montgomery, MT
Wang, Z
AF Dunkerton, T. J.
Montgomery, M. T.
Wang, Z.
TI Tropical cyclogenesis in a tropical wave critical layer: easterly waves
SO ATMOSPHERIC CHEMISTRY AND PHYSICS
LA English
DT Review
ID SYNOPTIC-SCALE DISTURBANCES; MESOSCALE CONVECTIVE SYSTEMS; MADDEN-JULIAN
OSCILLATION; COUPLED EQUATORIAL WAVES; ROSSBY-GRAVITY-WAVES;
INTERTROPICAL CONVERGENCE ZONE; LAGRANGIAN COHERENT STRUCTURES;
MERIDIONAL WIND OSCILLATIONS; SEASONAL HURRICANE FREQUENCY; CYCLONE
FORMATION
AB The development of tropical depressions within tropical waves over the Atlantic and eastern Pacific is usually preceded by a 'surface low along the wave' as if to suggest a hybrid wave-vortex structure in which flow streamlines not only undulate with the waves, but form a closed circulation in the lower troposphere surrounding the low. This structure, equatorward of the easterly jet axis, is identified herein as the familiar critical layer of waves in shear flow, a flow configuration which arguably provides the simplest conceptual framework for tropical cyclogenesis resulting from tropical waves, their interaction with the mean flow, and with diabatic processes associated with deep moist convection. The recirculating Kelvin cat's eye within the critical layer represents a sweet spot for tropical cyclogenesis in which a proto-vortex may form and grow within its parent wave. A common location for storm development is given by the intersection of the wave's critical latitude and trough axis at the center of the cat's eye, with analyzed vorticity centroid nearby. The wave and vortex live together for a time, and initially propagate at approximately the same speed. In most cases this coupled propagation continues for a few days after a tropical depression is identified. For easterly waves, as the name suggests, the propagation is westward. It is shown that in order to visualize optimally the associated Lagrangian motions, one should view the flow streamlines, or stream function, in a frame of reference translating horizontally with the phase propagation of the parent wave. In this co-moving frame, streamlines are approximately equivalent to particle trajectories. The closed circulation is quasi-stationary, and a dividing streamline separates air within the cat's eye from air outside. The critical layer equatorward of the easterly jet axis is important to tropical cyclogenesis because its cat's eye provides (i) a region of cyclonic vorticity and weak deformation by the resolved flow, (ii) containment of moisture entrained by the developing gyre and/or lofted by deep convection therein, (iii) confinement of mesoscale vortex aggregation, (iv) a predominantly convective type of heating profile, and (v) maintenance or enhancement of the parent wave until the vortex becomes a self-sustaining entity and emerges from the wave as a tropical depression. The entire sequence is likened to the development of a marsupial infant in its mother's pouch. These ideas are formulated in three new hypotheses describing the flow kinematics and dynamics, moist thermodynamics and wave/vortex interactions comprising the 'marsupial paradigm'. A survey of 55 named tropical storms in 1998-2001 reveals that actual critical layers sometimes resemble the ideal east-west train of cat's eyes, but are usually less regular, with one or more recirculation regions in the co-moving frame. It is shown that the kinematics of isolated proto-vortices carried by the wave also can be visualized in a frame of reference translating at or near the phase speed of the parent wave. The proper translation speeds for wave and vortex may vary with height owing to vertical shear and wave-vortex interaction. Some implications for entrainment/containment of vorticity and moisture in the cat's eye are discussed from this perspective, based on the observational survey.
C1 [Dunkerton, T. J.] NW Res Associates Inc, Bellevue, WA 98009 USA.
[Dunkerton, T. J.; Montgomery, M. T.; Wang, Z.] Naval Postgrad Sch, Monterey, CA USA.
RP Dunkerton, TJ (reprint author), NW Res Associates Inc, POB 3027, Bellevue, WA 98009 USA.
EM tim@nwra.com
FU National Aeronautics and Space Administration [MIPR NNG07HU171,
NNH04CC63C]; National Science Foundation [ATM-0715426, ATM-0649944,
ATM-0649946, ATM-0227632, ATM-0733380]; Office of Naval Research
[N001408WR20129]; US Naval Postgraduate School in Monterey, California
FX Our work was motivated and guided, in part, by, by the continuous and
tireless efforts of operational forecasters at the National Hurricane
Center/Tropical Prediction Center of NOAA, whose skill at teasing
rotational signals out of remotely sensed imagery is unsurpassed.
Helpful reviews of the Discussion Paper were provided by David Raymond,
Gilbert Brunet, Michael McIntyre and Volkmar Wirth. We thank Michael
Riemer for an important clarification. This research was supported by
the National Aeronautics and Space Administration, MIPR NNG07HU171 and
Contract NNH04CC63C, the National Science Foundation Grants ATM-0715426,
ATM-0649944, ATM-0649946, ATM-0227632 and ATM-0733380, the Office of
Naval Research grant N001408WR20129 and by the US Naval Postgraduate
School in Monterey, California.
NR 204
TC 146
Z9 150
U1 6
U2 33
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 1680-7316
EI 1680-7324
J9 ATMOS CHEM PHYS
JI Atmos. Chem. Phys.
PY 2009
VL 9
IS 15
BP 5587
EP 5646
PG 60
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 482HW
UT WOS:000268876600014
ER
PT J
AU Cammas, JP
Brioude, J
Chaboureau, JP
Duron, J
Mari, C
Mascart, P
Nedelec, P
Smit, H
Patz, HW
Volz-Thomas, A
Stohl, A
Fromm, M
AF Cammas, J. -P.
Brioude, J.
Chaboureau, J. -P.
Duron, J.
Mari, C.
Mascart, P.
Nedelec, P.
Smit, H.
Paetz, H. -W.
Volz-Thomas, A.
Stohl, A.
Fromm, M.
TI Injection in the lower stratosphere of biomass fire emissions followed
by long-range transport: a MOZAIC case study
SO ATMOSPHERIC CHEMISTRY AND PHYSICS
LA English
DT Article
ID BOREAL FOREST-FIRE; PARTICLE DISPERSION MODEL; IN-SERVICE AIRCRAFT;
AIRBORNE PROGRAM; SMOKE INJECTION; WATER-VAPOR; TROPOSPHERE; CONVECTION;
OZONE; NITROGEN
AB This paper analyses a stratospheric injection by deep convection of biomass fire emissions over North America (Alaska, Yukon and Northwest Territories) on 24 June 2004 and its long-range transport over the eastern coast of the United States and the eastern Atlantic. The case study is based on airborne MOZAIC observations of ozone, carbon monoxide, nitrogen oxides and water vapour during the crossing of the southernmost tip of an upper level trough over the Eastern Atlantic on 30 June and on a vertical profile over Washington DC on 30 June, and on lidar observations of aerosol backscattering at Madison (University of Wisconsin) on 28 June. Attribution of the observed CO plumes to the boreal fires is achieved by backward simulations with a Lagrangian particle dispersion model (FLEXPART). A simulation with the Meso-NH model for the source region shows that a boundary layer tracer, mimicking the boreal forest fire smoke, is lofted into the lowermost stratosphere (2-5 pvu layer) during the diurnal convective cycle at isentropic levels (above 335 K) corresponding to those of the downstream MOZAIC observations. It is shown that the order of magnitude of the time needed by the parameterized convective detrainment flux to fill the volume of a model mesh (20 km horizontal, 500 m vertical) above the tropopause with pure boundary layer air would be about 7.5 h, i.e. a time period compatible with the convective diurnal cycle. Over the area of interest, the maximum instantaneous detrainment fluxes deposited about 15 to 20% of the initial boundary layer tracer concentration at 335 K. According to the 275-ppbv carbon monoxide maximum mixing ratio observed by MOZAIC over Eastern Atlantic, such detrainment fluxes would be associated with a 1.4-1.8 ppmv carbon monoxide mixing ratio in the boundary layer over the source region.
C1 [Cammas, J. -P.; Chaboureau, J. -P.; Duron, J.; Mari, C.; Mascart, P.; Nedelec, P.] Univ Toulouse, UPS, LA, F-31400 Toulouse, France.
[Cammas, J. -P.; Chaboureau, J. -P.; Duron, J.; Mari, C.; Mascart, P.; Nedelec, P.] CNRS, LA, F-31400 Toulouse, France.
[Brioude, J.] NOAA, Earth Sci Res Lab, Div Chem Sci, Boulder, CO USA.
[Smit, H.; Paetz, H. -W.; Volz-Thomas, A.] Forschungszentrum Julich, Julich, Germany.
[Stohl, A.] Norwegian Inst Air Res NILU, Kjeller, Norway.
[Fromm, M.] USN, Res Lab, Washington, DC 20375 USA.
RP Cammas, JP (reprint author), Univ Toulouse, UPS, LA, 14 Ave Edouard Belin, F-31400 Toulouse, France.
EM jean-pierre.cammas@aero.obs-mip.fr
RI Fromm, Michael/F-4639-2010; Stohl, Andreas/A-7535-2008; Brioude,
Jerome/E-4629-2011; Smit, Herman/J-2397-2012; Volz-Thomas,
Andreas/J-7223-2012
OI Stohl, Andreas/0000-0002-2524-5755; Smit, Herman/0000-0002-2268-4189;
Volz-Thomas, Andreas/0000-0003-3700-1667
FU INSU-CNRS (France); Meteo-France; Forschungszentrum (FZJ, Julich,
Germany); ETHER
FX The authors acknowledge for their strong support the European
Communities, EADS, Airbus and the airlines (Lufthansa, Austrian, Air
France) who carry free of charge the MOZAIC equipment and perform the
maintenance since 1994. MOZAIC is presently funded by INSU-CNRS
(France), Meteo-France, and Forschungszentrum (FZJ, Julich, Germany).
The MOZAIC data based is supported by ETHER (CNES and INSU-CNRS). We
acknowledge E. Eloranta at the University of Wisconsin lidar group for
providing lidar free-access images and O. Cooper (NOAA, Boulder, USA)
for the set up of the web pages of the FLEXPART simulations for the
ICARTT experiment. Computer resources for the Meso-NH simulations were
allocated by IDRIS (projects 005, 569, and 1076). GOES-10 observations
come from by SATMOS (CNRS/Meteo-France) and SAA (NOAA).
NR 57
TC 16
Z9 16
U1 0
U2 13
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 1680-7316
J9 ATMOS CHEM PHYS
JI Atmos. Chem. Phys.
PY 2009
VL 9
IS 15
BP 5829
EP 5846
PG 18
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 482HW
UT WOS:000268876600025
ER
PT J
AU Follette-Cook, MB
Hudson, RD
Nedoluha, GE
AF Follette-Cook, M. B.
Hudson, R. D.
Nedoluha, G. E.
TI Classification of Northern Hemisphere stratospheric ozone and water
vapor profiles by meteorological regime
SO ATMOSPHERIC CHEMISTRY AND PHYSICS
LA English
DT Article
ID HALOGEN OCCULTATION EXPERIMENT; TROPOPAUSE MASS-EXCHANGE; LOWERMOST
STRATOSPHERE; SAGE-II; TROPICAL TROPOPAUSE; POTENTIAL VORTICITY;
SEASONAL-VARIATION; MIXING-RATIO; TRANSPORT; TROPOSPHERE
AB The subtropical and polar upper troposphere fronts and the polar vortex serve as the boundaries to divide the Northern Hemisphere into four meteorological regimes. These regimes are defined as (1) the arctic regime - within the polar vortex, (2) the polar regime - between the polar front and the polar vortex, or when the latter is not present, the pole, (3) the midlatitude regime - between the subtropical and polar fronts, and (4) the tropical regime - between the equator and the subtropical front.
Data from the Halogen Occultation Experiment (HALOE) and the Stratospheric Aerosol and Gas Experiment II (SAGE II) were used to show that within each meteorological regime, ozone and water profiles are characterized by unique ozonepause and hygropause heights. Daily measurements and seven-year (1997-2003) monthly climatologies showed that, within each meteorological regime, both constituents exhibited distinct profile shapes from the tropopause up to approximately 20 km. This distinction was most pronounced in the winter and spring months, and weak in the summer and fall. Despite differences in retrieval techniques and sampling between the SAGE and HALOE instruments, the seven-year monthly climatologies calculated for each regime agreed well for both species below similar to 22 km.
Given that profiles of ozone and water vapor exhibit unique profiles shapes within each regime in the UTLS, trends in this region will therefore be the result of both changes within each meteorological regime, and changes in the relative contribution of each regime to a given zonal band over time.
C1 [Follette-Cook, M. B.; Nedoluha, G. E.] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
[Hudson, R. D.] Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20742 USA.
RP Follette-Cook, MB (reprint author), Univ Maryland Baltimore Cty, Goddard Earth Sci & Technol Ctr, Greenbelt, MD 20771 USA.
EM melanie.cook@nasa.gov
RI Hudson, Robert/F-4506-2010
FU NASA Science Mission Directorate; Naval Research Laboratory; National
Research Council Research Associateship; NASA Langley Research Center
(NASA-LaRC); NASA Langley Radiation and Aerosols Branch; HALOE website
FX The early part of this work was funded by a grant from the NASA Science
Mission Directorate and later by the Naval Research Laboratory. This
work was also performed in part while M. Follette-Cook held a National
Research Council Research Associateship award at the Naval Research
Laboratory. The SAGE II data were processed and provided by the NASA
Langley Research Center (NASA-LaRC) and the NASA Langley Radiation and
Aerosols Branch; the HALOE data were obtained from the HALOE website:
http://haloe.gats-inc.com/home/index.php; and the TOMS data were
obtained from the TOMS website: http://toms.gsfc.nasa.gov/. The authors
would like to thank the reviewers for their helpful and insightful
feedback.
NR 69
TC 6
Z9 7
U1 0
U2 3
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 1680-7316
J9 ATMOS CHEM PHYS
JI Atmos. Chem. Phys.
PY 2009
VL 9
IS 16
BP 5989
EP 6003
PG 15
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 489EY
UT WOS:000269404000009
ER
PT J
AU Conzemius, RJ
Montgomery, MT
AF Conzemius, R. J.
Montgomery, M. T.
TI Clarification on the generation of absolute and potential vorticity in
mesoscale convective vortices
SO ATMOSPHERIC CHEMISTRY AND PHYSICS
LA English
DT Article
ID SQUALL LINES; VORTEX; EVOLUTION; SYSTEM; MIDLATITUDE; PRECIPITATION;
MECHANISMS; SIMULATION
AB In this paper, we clarify several outstanding issues concerning the predominant mechanism of vorticity generation in mesoscale convective vortices (MCVs) in weak to modest baroclinic environments with nonzero Coriolis parameter. We examine also the corresponding diabatic heating profiles of the convective and stratiform components of the MCS and their effects on the concentration and dilution of PV substance.
C1 [Conzemius, R. J.; Montgomery, M. T.] Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA.
[Conzemius, R. J.] WindLogics Inc, Grand Rapids, MI USA.
[Montgomery, M. T.] Naval Postgrad Sch, Monterey, CA USA.
RP Conzemius, RJ (reprint author), Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA.
EM robert.conzemius@att.net
FU NSF [ATM-0305412]; US Naval Postgraduate School in Monterey, California,
USA
FX This work was conducted under the support of NSF grant ATM-0305412 and
the US Naval Postgraduate School in Monterey, California, USA. We would
also like to thank David Raymond, Chris Davis, and an anonymous reviewer
for their constructive comments towards improving the analysis
techniques in this manuscript.
NR 26
TC 5
Z9 6
U1 0
U2 1
PU COPERNICUS PUBLICATIONS
PI KATHLENBURG-LINDAU
PA MAX-PLANCK-STR 13, KATHLENBURG-LINDAU, 37191, GERMANY
SN 1680-7316
J9 ATMOS CHEM PHYS
JI Atmos. Chem. Phys.
PY 2009
VL 9
IS 19
BP 7591
EP 7605
PG 15
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 506MT
UT WOS:000270779700022
ER
PT J
AU Ern, M
Cho, HK
Preusse, P
Eckermann, SD
AF Ern, M.
Cho, H. -K.
Preusse, P.
Eckermann, S. D.
TI Properties of the average distribution of equatorial Kelvin waves
investigated with the GROGRAT ray tracer
SO ATMOSPHERIC CHEMISTRY AND PHYSICS
LA English
DT Article
ID QUASI-BIENNIAL OSCILLATION; STRATOSPHERE-TROPOSPHERE EXCHANGE; AFFECTED
MICROWAVE RADIANCES; ATMOSPHERIC GRAVITY-WAVES; MIDDLE ATMOSPHERE;
1D+4D-VAR ASSIMILATION; SPECTRAL PARAMETERIZATION; TROPICAL
STRATOSPHERE; TRANSIENT-RESPONSE; LOWER THERMOSPHERE
AB Kelvin waves excited by tropospheric convection are considered to be one of the main drivers of the stratospheric quasi-biennial oscillation (QBO). In this paper we combine several measured data sets with the Gravity wave Regional Or Global RAy Tracer (GROGRAT) in order to study the forcing and vertical propagation of Kelvin waves. Launch distributions for the ray tracer at tropospheric altitudes are deduced from space-time spectra of European Centre for Medium-Range Weather Forecasts (ECMWF) operational analyses, as well as outgoing longwave radiation (OLR) and rainfall data measured by the Tropical Rainfall Measuring Mission (TRMM) satellite. The resulting stratospheric Kelvin wave spectra are compared to ECMWF operational analyses and temperature measurements of the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) satellite instrument. Questions addressed are: the relative importance of source variability versus wind modulation, the relative importance of radiative and turbulent damping versus wave breaking, and the minimum altitude where freely propagating waves dominate the spectrum.
C1 [Ern, M.; Preusse, P.] KFA Julich GmbH, Forschungszentrum, Inst Chem & Dynam Geosphere ICG 1, Julich, Germany.
[Cho, H. -K.] Yonsei Univ, Dept Atmospher Sci, Seoul 120749, South Korea.
[Eckermann, S. D.] USN, Res Lab, EO Hulburt Ctr, Washington, DC 20375 USA.
RP Ern, M (reprint author), KFA Julich GmbH, Forschungszentrum, Inst Chem & Dynam Geosphere ICG 1, Julich, Germany.
EM m.ern@fz-juelich.de
RI Preusse, Peter/A-1193-2013; Ern, Manfred/I-8839-2016
OI Preusse, Peter/0000-0002-8997-4965; Ern, Manfred/0000-0002-8565-2125
FU European Commission [505390-GOCE-CT-2004]; Korea Science and Engineering
Foundation (KOSEF) through the National Research Lab; Ministry of
Science and Technology [M10500000114-06J0000-11410]
FX The work of M. Ern was supported by the European Commission (European
Union's 6th framework program) within the EC Integrated Project SCOUT-O3
(505390-GOCE-CT-2004). The work of H.-K. Cho was supported by the Korea
Science and Engineering Foundation (KOSEF) through the National Research
Lab. Program funded by the Ministry of Science and Technology
(M10500000114-06J0000-11410). We thank the whole SABER team, in
particular M. G. Mlynczak, J. M. Russell III, and L. L. Gordley for
providing the excellent data set of SABER temperatures. Thanks also go
to the European Centre for Medium-Range Weather Forecasts (ECMWF) for
providing the global ECMWF analyses used. Helpful comments by two
anonymous reviewers are acknowledged.
NR 67
TC 9
Z9 10
U1 0
U2 7
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 1680-7316
EI 1680-7324
J9 ATMOS CHEM PHYS
JI Atmos. Chem. Phys.
PY 2009
VL 9
IS 20
BP 7973
EP 7995
PG 23
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 512IL
UT WOS:000271240500020
ER
PT S
AU Landi, E
Feldman, U
AF Landi, Enrico
Feldman, Uri
BE Fournier, KB
TI The thermal structure of the solar upper atmosphere
SO ATOMIC PROCESSES IN PLASMAS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 16th International Conference on Atomic Processes in Plasmas
CY MAR 22-26, 2009
CL Monterey, CA
SP US DOE Off Fus Engergy Sci, Lawrence Livemore Natl Lab, NIF & Photon Sci Directorate, Lawrence Livemore Natl Lab, Phys & Life Sci Directorate, Los Alamos Natl Lab, Univ Calif, Inst Mat Dynam Extreme Condit
DE Solar atmosphere; solar corona; solar transition region; diagnostic
techniques
ID EQUATORIAL CORONAL HOLE; SUMER; DIAGNOSTICS; EMISSION; PLASMAS;
TEMPERATURE; RADIO; LINES; SOHO; LIMB
AB In the present work we review the thermal structure of the solar atmosphere. We first discuss the main diagnostic techniques used to measure it, outlining their pitfalls and limitations. Then, we review the recent measurements of the thermal structure of the solar atmosphere carried out with the SOHO spectrometers CDS and SUMER. The review shows that the solar upper atmosphere is made by an ensemble of few, nearly isothermal plasmas with fixed temperatures, disconnected from the colder, thermally continuous lower atmosphere.
C1 [Landi, Enrico; Feldman, Uri] USN, Res Lab, Artep Inc, Washington, DC 20375 USA.
RP Landi, E (reprint author), USN, Res Lab, Artep Inc, 4555 Overlook Ave SW, Washington, DC 20375 USA.
RI Landi, Enrico/H-4493-2011
NR 23
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0698-8
J9 AIP CONF PROC
PY 2009
VL 1161
BP 142
EP 151
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA BOC76
UT WOS:000276195200023
ER
PT S
AU Dasgupta, A
Clark, RW
Davis, J
Giuliani, JG
AF Dasgupta, A.
Clark, R. W.
Davis, J.
Giuliani, J. G.
BE Fournier, KB
TI X-ray Spectroscopy of K- and L-shell Z-pinch and Astrophysical Plasmas
SO ATOMIC PROCESSES IN PLASMAS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 16th International Conference on Atomic Processes in Plasmas
CY MAR 22-26, 2009
CL Monterey, CA
SP US DOE Off Fus Engergy Sci, Lawrence Livermore Natl Lab, NIF & Photon Sci Directorate, Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Los Alamos Natl Lab, Univ Calif, Inst Mat Dynam Extreme Condit
DE Wire array Z pinch; X-ray spectra; Plasma diagnostic; Dielectronic
recombination
ID DIELECTRONIC RECOMBINATION; CASSIOPEIA-A; IONIZATION; SELENIUM; IMPACT
AB In recent years, there have been significant advances in instrumental capabilities for making X-ray spectroscopic measurements of astrophysical plasmas. There have been corresponding improvements in X-ray diagnostics for advanced multi-mega-ampere pulse power machines that produce increasingly large radiative yields from gas-puff and wire array Z pinch plasmas. Analysis used for Z pinches can be used to study ICF and also astrophysical plasmas where laboratory measurements and simulations are the only means to interpret observed data. The astrophysical data for Fe, the most cosmically abundant high Z element, can provide a wealth of information about cosmic plasmas. Fe is also the key element in stainless steel (SS) wire arrays that are investigated as an intense X-ray radiation source at the Z machine at Sandia National Laboratories. The implosion dynamics of an array of wires on the Z and/or refurbished Z accelerator produces an abundance of radiation from the K- and L-shell ionization stages. These dynamic plasmas are inherently non-LTE, with opacity and other factors influencing the X-ray output. As the plasma assembles on axis, a number of time resolved snapshots provide temperature and density profiles and map the emitting region. We will analyze the ionization dynamics and generate K- and L-shell spectra using the conditions generated in the Z and/or refurbished Z accelerator, described by a 1-D non-LTE radiation-hydrodynamics model. Diagnostics based on spectral shape of L-shell emissions are inherently more difficult than those based on K-shell emissions because of more complex multiplet structures and line overlaps. The non-LTE populations are obtained by using detailed atomic models that include all important excitation, ionization, and recombination processes. We will highlight the connection between laboratory Z-pinch plasma simulations and astrophysical plasmas.
C1 [Dasgupta, A.; Davis, J.; Giuliani, J. G.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Clark, R. W.] Berkeley Res Assoc, Beltsville, MD 20705 USA.
RP Dasgupta, A (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
FU US Department of Energy/NNSA
FX This work was supported by the US Department of Energy/NNSA.
NR 19
TC 1
Z9 1
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-0698-8
J9 AIP CONF PROC
PY 2009
VL 1161
BP 207
EP +
PG 2
WC Physics, Fluids & Plasmas
SC Physics
GA BOC76
UT WOS:000276195200029
ER
PT S
AU Merritt, SA
AF Merritt, Scott A.
BE Sadjadi, FA
Mahalanobis, A
TI A Multiframe 2D-to-3D Video Georegistration Algorithm
SO AUTOMATIC TARGET RECOGNITION XIX
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Automatic Target Recognition XIX
CY APR 13-14, 2009
CL Orlando, FL
SP SPIE
DE Georegistration; 2D/3D Registration; Video Targeting; Multi-Frame
Registration; Image Sequence Registration
AB Targeting from video relies upon precise image and video registration. Historically, the technology to automate this georegistration has operated using 2D transform spaces under the often naive assumption that the imaged geometry is planar. The author previously demonstrated a fast 2D-to-3D registration algorithm that removes this assumption, provided a digital elevation model (DEM) is available. Whereas the previous algorithm operated independently on each frame of a video sequence, a new 2D-to-3D algorithm is proposed that exploits the structural consistency of the imaged geometry across frames. This work presents this novel algorithm and explores its efficacy in reducing targeting error.
C1 USN, Air Warfare Ctr, Weap Div, China Lake, CA 93555 USA.
RP Merritt, SA (reprint author), USN, Air Warfare Ctr, Weap Div, China Lake, CA 93555 USA.
NR 13
TC 0
Z9 0
U1 0
U2 6
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7601-2
J9 PROC SPIE
PY 2009
VL 7335
AR 73350S
DI 10.1117/12.817804
PG 9
WC Remote Sensing; Optics; Imaging Science & Photographic Technology
SC Remote Sensing; Optics; Imaging Science & Photographic Technology
GA BVD01
UT WOS:000291156300026
ER
PT J
AU Caldwell, JA
Mallis, MM
Caldwell, JL
Paul, MA
Miller, JC
Neri, DF
AF Caldwell, John A.
Mallis, Melissa M.
Caldwell, J. Lynn
Paul, Michel A.
Miller, James C.
Neri, David F.
CA Aerosp Med Association Fatigue Cou
TI Fatigue Countermeasures in Aviation
SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE
LA English
DT Review
DE alertness; sleep; hypnotics; stimulants; flight time regulations; duty
time regulations; sustained operations
ID HELICOPTER PILOT PERFORMANCE; LONG-HAUL FLIGHTS; DISORDERS CONSENSUS
REPORT; HUMAN CIRCADIAN-RHYTHMS; PHASE RESPONSE CURVE; JET-LAG; SHIFT
WORK; SLEEP-DEPRIVATION; HEALTHY-SUBJECTS; COGNITIVE PERFORMANCE
AB Pilot fatigue is a significant problem in modern aviation operations, largely because of the unpredictable work hours, long duty periods, circadian disruptions, and insufficient sleep that arc, commonplace in both civilan and military flight operations. The full impact of fatigue is often underappreciated, but many of its deleterious effects have long been known. Compared to people who are well-rested, people who are sleep deprived think and move more slowly, make more mistakes, and have memory difficulties. These negative effects may and do lead to aviation errors and accidents. In the 1930s, flight time limitations, suggested lay-over durations, and aircrew sleep recommendations were developed in ail attempt to mitigate aircrew fatigue. Unfortunately, there have heen few changes to aircrew scheduling provisions and flight time limitations Since the time they were first introduced, despite evidence that updates are needed. Although the scientific under landing of fatigue, sleep, shift work, and circadian physiology has advanced significantly over the past several decades, current regulations and industry practices have in large part failed to adequately incorporate the new knowledge. Thus, the problem of pilot fatigue has steadily increased along with fatigue-related concerns oven air safety. Accident statistics, reports from pilots themselves, and operational flight studies all show that fatigue is a growing concern within aviation operations. This position paper reviews the relevant scientific literature, summarizes applicable U.S. civilian and military flight regulations, evaluates various in-flight and pre/postflight fatigue countermeasure, and describe emerging technologies for detecting and countering fatigue. Following the discussion of each major issue, position statements address ways to deal with fatigue in specific contexts with the goal of using current scientific knowledge to update policy and provide tools and technique, for improving air safety.
C1 [Caldwell, John A.] USAF, Res Lab, Human Effectiveness Directorate, Wright Patterson AFB, OH 45433 USA.
[Mallis, Melissa M.] Inst Behavior Resources Inc, Baltimore, MD USA.
[Caldwell, John A.] Archinoet LLC, Honolulu, HI USA.
[Paul, Michel A.] Def R&D Canada Toronto, Toronto, ON, Canada.
[Miller, James C.] Miller Ergon, San Antonio, TX USA.
[Neri, David F.] Off Naval Res, Arlington, VA 22217 USA.
RP Caldwell, JA (reprint author), USAF, Res Lab, Human Effectiveness Directorate, Wright Patterson AFB, OH 45433 USA.
EM lynn.caldwell@wpafb.af.mil
OI Miller, James/0000-0002-3897-8376
FU AHFC; Aerospace Medical Association Executive Council
FX The authors wish to thank Dr. Thomas Nesthus, Chair Of the Aerospace
Human Factors Committee (AHFC) for his guidance and Support throughout a
lengthy process. We are also grateful to CAPT Nicholas Davenport for
comments and information regarding U.S. Navy flight duty/rest
regulations and Capt. Barry Reeder for information about corresponding
U.S. Air Force regulations though any errors remain ours. We thank the
members of the AHFC for their comments on an earlier version of the
manuscript, especially Dr. Ronald Hoffman and Dr. David Schroeder as
well as the Aerospace Medical Association Executive Council for its
comments and review, particularly Dr. Russell Rayman, Dr. Guillermo
Salazar, Dr. Estrella Forster, and CA PT Christopher Armstrong.
NR 231
TC 48
Z9 54
U1 7
U2 28
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 JAN
PY 2009
VL 80
IS 1
BP 29
EP 59
DI 10.3357/ASEM.2435.2009
PG 31
WC Public, Environmental & Occupational Health; Medicine, General &
Internal; Sport Sciences
SC Public, Environmental & Occupational Health; General & Internal
Medicine; Sport Sciences
GA 390XP
UT WOS:000262197300007
PM 19180856
ER
PT J
AU Barlow, DE
Dickinson, GH
Orihuela, B
Rittschof, D
Wahl, KJ
AF Barlow, D. E.
Dickinson, G. H.
Orihuela, B.
Rittschof, D.
Wahl, K. J.
TI In situ ATR-FTIR characterization of primary cement interfaces of the
barnacle Balanus amphitrite
SO BIOFOULING
LA English
DT Article
DE barnacle cement; protein secondary structure; marine bioadhesion;
antifouling; infrared spectroscopy; attenuated total reflection
ID SECONDARY STRUCTURE; AMPHIBALANUS-AMPHITRITE; INFRARED-SPECTROSCOPY;
ANTIFOULING COATINGS; ADHESIVE PLAQUE; PROTEINS; SETTLEMENT; MECHANICS;
SPECTRA
AB A method is presented for characterizing primary cement interfaces of barnacles using in situ attenuated total reflection-Fourier transform infrared spectroscopy. Primary cement of the barnacle, Balanus amphitrite (Amphibalanus amphitrite), was characterized without any disruption to the original cement interface, after settling and growing barnacles directly on double sided polished germanium wafers. High-quality IR spectra were acquired of live barnacle cement interfaces, providing a spectroscopic fingerprint of cured primary cement in vivo with the barnacle adhered to the substratum. Additional spectra were also acquired of intact cement interfaces for which the upper portion of the barnacle had been removed leaving only the base plate and cement layer attached to the substratum. This allowed further characterization of primary cement interfaces that were dried or placed in D(2)O. The resulting spectra were consistent with the cement being proteinaceous, and allowed analysis of the protein secondary structure and water content in the cement layer. The estimated secondary structure composition was primarily beta-sheet, with additional alpha-helix, turn and unordered components. The cement of live barnacles, freshly removed from seawater, was estimated to have a water content of 20-50% by weight. These results provide new insights into the chemical properties of the undisturbed barnacle adhesive interface.
C1 [Barlow, D. E.; Wahl, K. J.] USN, Res Lab, Washington, DC 20375 USA.
[Barlow, D. E.] Nova Res Inc, Alexandria, VA USA.
[Dickinson, G. H.; Orihuela, B.; Rittschof, D.] Duke Univ, Marine Lab, Beaufort, NC 28516 USA.
RP Wahl, KJ (reprint author), USN, Res Lab, Code 6176, Washington, DC 20375 USA.
EM kathryn.wahl@nrl.navy.mil
RI Barlow, Daniel/C-9006-2013;
OI Dickinson, Gary/0000-0003-1073-1483; Wahl, Kathryn/0000-0001-8163-6964
FU US Office of Naval Research; NRL; Duke University
FX The authors gratefully acknowledge John Russell, Jr ( NRL) for helpful
discussions. This research was funded by the US Office of Naval Research
at both NRL and Duke University.
NR 31
TC 32
Z9 33
U1 0
U2 9
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0892-7014
J9 BIOFOULING
JI Biofouling
PY 2009
VL 25
IS 4
BP 359
EP 366
DI 10.1080/08927010902812009
PG 8
WC Biotechnology & Applied Microbiology; Marine & Freshwater Biology
SC Biotechnology & Applied Microbiology; Marine & Freshwater Biology
GA 421RE
UT WOS:000264375200005
PM 19263278
ER
PT S
AU Beadie, G
Fleet, E
Shirk, JS
Hiltner, A
Baer, E
AF Beadie, G.
Fleet, E.
Shirk, James S.
Hiltner, A.
Baer, E.
BE Razeghi, M
Mohseni, H
TI Bio-Inspired Polymer Optics
SO BIOSENSING II
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Biosensing II
CY AUG 04-06, 2009
CL San Diego, CA
SP SPIE
ID GRADIENT REFRACTIVE-INDEX; MICROLAYER COEXTRUSION; HUMAN LENS; MODELS
AB This paper reviews recent progress in the design and fabrication of bio-inspired gradient index lenses. Inspired by the gradient index distributions of the protein layers in biological eyes, we employ nested layers of polymer composites to create smoothly-varying index distributions within bulk lens substrates. Because the fabrication technique allows for independent control of the index layers, the index contours, and the final lens surfaces, optical power can be combined with aberration control in a single element. Gradient-index singlets which correct for spherical aberration and singlets which correct for chromatic aberration are described as examples of the utility of this class of optics.
C1 [Beadie, G.; Fleet, E.; Shirk, James S.] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
RP Beadie, G (reprint author), USN, Res Lab, Div Opt Sci, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 15
TC 0
Z9 0
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7687-6
J9 PROC SPIE
PY 2009
VL 7397
AR 739708
DI 10.1117/12.827517
PG 5
WC Biotechnology & Applied Microbiology; Engineering, Biomedical; Optics;
Physics, Applied
SC Biotechnology & Applied Microbiology; Engineering; Optics; Physics
GA BVQ85
UT WOS:000292381700008
ER
PT J
AU Mulvaney, SP
Myers, KM
Sheehan, PE
Whitman, LJ
AF Mulvaney, S. P.
Myers, K. M.
Sheehan, P. E.
Whitman, L. J.
TI Attomolar protein detection in complex sample matrices with
semi-homogeneous fluidic force discrimination assays
SO BIOSENSORS & BIOELECTRONICS
LA English
DT Article; Proceedings Paper
CT 10th World Congress on Biosensors
CY MAY 14-16, 2008
CL Shanghai, PEOPLES R CHINA
DE Biosensor; Fluidic force discrimination (FFD); Attomolar sensitivity;
Immunoassay; Microbeads; Complex matrices
ID BARCODE AMPLIFICATION ASSAY; REAL-TIME PCR; MAGNETIC MICROBEADS;
BIOSENSORS; DNA; SENSORS; SENSITIVITY; CONSTANTS; AFFINITY; ANTIGEN
AB We describe a semi-homogenous (SH) implementation of a fluidic force discrimination (TM) (FFD) assay using only two reagent mixtures and three assay steps that can be performed in as little as 10 min. Previously microbead labels and FFD have been combined to achieve multiplexed, femtomolar nucleic acid hybridization and immunoassays in a microarray format [Mulvaney, S.P., Cole, C.L., Knitter, M.D., Malito, M., Tamanaha, C.R., Rife, J.C., Stanton, M.W., Whitman, L.J., 2007. Biosen. Bioelectron. 23, 191-200.]. In SH FFD assays, the microbeads and any required intermediate receptors (e.g., secondary antibodies) are first mixed directly with a sample, allowing target analytes to be efficiently captured onto the beads. The target-loaded beads are then specifically captured onto a microarray surface, with nonspecifically bound beads removed by controlled, laminar fluidic forces. The remaining beads on each microarray capture spot are counted to determine the targets' identities and concentrations. SH target collection provides a 1000-fold improvement in the assay sensitivity, down to attomolar concentrations, as demonstrated by our detection of staphylococcal enterotoxin B (SEB) at 35 aM (1 fg/ml). We also show that SH assays are adaptable for extraction, preconcentration, and identification of analytes in complex sample matrices, including assays for SEB and ricin toxoid in serum and whole blood. Finally, we present a detailed model of the reaction kinetics that reveals how capturing the targets onto the beads in solution provides a significant kinetic advantage at low target concentrations where mass transport to a microarray surface is most limited. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Mulvaney, S. P.; Myers, K. M.; Sheehan, P. E.; Whitman, L. J.] USN, Res Lab, Washington, DC 20375 USA.
RP Mulvaney, SP (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM shawn.mulvaney@nrl.navy.mil
RI Sheehan, Paul/B-4793-2010; Whitman, Lloyd/G-9320-2011
OI Sheehan, Paul/0000-0003-2668-4124; Whitman, Lloyd/0000-0002-3117-1174
NR 41
TC 53
Z9 53
U1 0
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 JAN 1
PY 2009
VL 24
IS 5
SI SI
BP 1109
EP 1115
DI 10.1016/j.bios.2008.06.010
PG 7
WC Biophysics; Biotechnology & Applied Microbiology; Chemistry, Analytical;
Electrochemistry; Nanoscience & Nanotechnology
SC Biophysics; Biotechnology & Applied Microbiology; Chemistry;
Electrochemistry; Science & Technology - Other Topics
GA 405CL
UT WOS:000263199800008
PM 18656344
ER
PT J
AU Adkins, RM
Krushkal, J
Somes, G
Fain, J
Morrison, J
Klauser, C
Magann, EF
AF Adkins, Ronald M.
Krushkal, Julia
Somes, Grant
Fain, John
Morrison, John
Klauser, Chad
Magann, Everett F.
TI Extensive parent-of-origin genetic effects on fetal growth
SO BMC BIOINFORMATICS
LA English
DT Meeting Abstract
CT 8th Annual UT-ORNL-KBRIN Bioinformatics Summit
CY MAR 20-22, 2009
CL Pikeville, TN
SP Univ Tennessee, Oak Ridge Natl Lab, Kentucky Biomed Res Infrastruct Network
C1 [Adkins, Ronald M.] Univ Tennessee, Ctr Hlth Sci, Dept Pediat, Memphis, TN 38163 USA.
[Krushkal, Julia; Somes, Grant] Univ Tennessee, Ctr Hlth Sci, Dept Prevent Med, Memphis, TN 38163 USA.
[Fain, John] Univ Tennessee, Ctr Hlth Sci, Dept Mol Sci, Memphis, TN 38163 USA.
[Morrison, John; Klauser, Chad] Univ Mississippi, Med Ctr, Dept Obstet & Gynecol, Jackson, MS 39216 USA.
[Magann, Everett F.] USN, Med Ctr Portsmouth, Dept Obstet & Gynecol, Portsmouth, VA 23708 USA.
EM radkins1@utmem.edu
NR 0
TC 0
Z9 0
U1 0
U2 0
PU BIOMED CENTRAL LTD
PI LONDON
PA CURRENT SCIENCE GROUP, MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T
4LB, ENGLAND
SN 1471-2105
J9 BMC BIOINFORMATICS
JI BMC Bioinformatics
PY 2009
VL 10
AR A13
DI 10.1186/1471-2105-10-S7-A13
PG 2
WC Biochemical Research Methods; Biotechnology & Applied Microbiology;
Mathematical & Computational Biology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Mathematical & Computational Biology
GA 464RP
UT WOS:000267524000015
ER
PT J
AU Lawenda, BD
Mondry, TE
Johnstone, PAS
AF Lawenda, Brian D.
Mondry, Tammy E.
Johnstone, Peter A. S.
TI Lymphedema: A Primer on the Identification and Management of a Chronic
Condition in Oncologic Treatment
SO CA-A CANCER JOURNAL FOR CLINICIANS
LA English
DT Review
ID BREAST-CANCER-TREATMENT; QUALITY-OF-LIFE; LEVEL LASER THERAPY; COMPLETE
DECONGESTIVE THERAPY; RANDOMIZED CONTROLLED-TRIAL; UPPER EXTREMITY
LYMPHEDEMA; MANUAL LYMPHATIC DRAINAGE; AXILLARY NODE DISSECTION; ARM
LYMPHEDEMA; POSTMASTECTOMY LYMPHEDEMA
AB The primary goals of oncologic therapy are the compassionate care of cancer patients, eradication of disease, and palliation of symptoms. Advances in various targeted therapies such as highly conformal and image-guided radiotherapy techniques, sentinel lymph node dissection, and molecularly targeted agents hold the promise of allowing those goals to be reached with fewer treatment-related complications. Unfortunately, certain side effects remain problematic due to the inability to Completely avoid injuring normal tissues. Lymphedema, a chronic condition that occurs as a result of the body's inability to drain lymph fluid from the tissues, is a common treatment-related side effect experienced, by cancer patients. In this review, many of the important aspects of lymphedema with which clinicians who treat cancer patients, should be familiar are outlined, including the anatomy, pathophysiology, diagnosis, and management of this condition. The authors also identify some of, the resources available both to cancer patients with lymphedema and to the clinicians who treat them. It is hoped that this review will convey the importance of the early identification and management of this incurable disorder because this is essential to minimizing its complications. CA Cancer J Clin 2009;59:8-24. (C) 2009 American Cancer Society.
C1 [Lawenda, Brian D.] USN, Dept Radiat Oncol, Med Ctr, San Diego, CA 92134 USA.
[Lawenda, Brian D.] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
[Lawenda, Brian D.] Breast Hlth Ctr, San Diego, CA USA.
[Lawenda, Brian D.; Johnstone, Peter A. S.] Indiana Univ, Sch Med, Dept Radiat Oncol, Indianapolis, IN 46202 USA.
[Mondry, Tammy E.] New Horizons Phys Therapy, San Diego, CA USA.
RP Lawenda, BD (reprint author), USN, Dept Radiat Oncol, Med Ctr, 34800 Bob Wilson Dr, San Diego, CA 92134 USA.
EM brian.lawenda@med.navy.mil
NR 110
TC 114
Z9 125
U1 2
U2 14
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0007-9235
J9 CA-CANCER J CLIN
JI CA-Cancer J. Clin.
PD JAN-FEB
PY 2009
VL 59
IS 1
BP 8
EP 24
DI 10.3322/caac.20001
PG 17
WC Oncology
SC Oncology
GA 408PQ
UT WOS:000263447500004
PM 19147865
ER
PT S
AU Aha, DW
Molineaux, M
Sukthankar, G
AF Aha, David W.
Molineaux, Matthew
Sukthankar, Gita
BE McGinty, L
Wilson, DC
TI Case-Based Reasoning in Transfer Learning
SO CASE-BASED REASONING RESEARCH AND DEVELOPMENT, PROCEEDINGS
SE Lecture Notes in Artificial Intelligence
LA English
DT Proceedings Paper
CT 8th International Conference on Case-Based Reasoning
CY JUL 20-23, 2009
CL Seattle, WA
SP Boeing Co, DARPA, IPTO, Empolis, US Naval Res Lab, Verdande Technol
ID GAMES
AB Positive transfer learning (TL) occurs when, after gaining experience from learning how to solve a (Source) task, the same learner can exploit this experience to improve performance and/or learning on a different (target) task. TL methods are typically complex, and case-based reasoning can support them in multiple ways. We introduce a method for recognizing intent in a source task, and then applying that knowledge to improve the performance of a a case-based reinforcement learner in a target task. We report on its ability to significantly outperform baseline approaches for a control task in a simulated game of American football. We also compare our approach to an alternative approach where source and target task learning occur concurrently, and discuss the tradeoffs between them.
C1 [Aha, David W.] USN, Res Lab Code 5514, Navy Ctr Appl Res Artificial Intelligence, Washington, DC 20375 USA.
[Molineaux, Matthew] Knexus Res Corp, Springfield, VA 22153 USA.
[Sukthankar, Gita] Univ Cent Florida, Sch Elect Engn & Comp Sci, Orlando, FL 32816 USA.
RP Aha, DW (reprint author), USN, Res Lab Code 5514, Navy Ctr Appl Res Artificial Intelligence, Washington, DC 20375 USA.
EM david.aha@nrl.navy.mil; matthew.molineaux@knexusresearch.com;
gitars@eecs.ucf.edu
FU DARPA's Information Processing Techniques Office; Naval Research
Laboratory
FX This research was supported by DARPAs Information Processing Techniques
Office and the Naval Research Laboratory. Thanks also to Matthew Klenk
for his suggestions on this paper.
NR 34
TC 6
Z9 6
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0302-9743
BN 978-3-642-02997-4
J9 LECT NOTES ARTIF INT
PY 2009
VL 5650
BP 29
EP +
PG 4
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
Methods
SC Computer Science
GA BLX75
UT WOS:000271335600004
ER
PT S
AU Hum, L
Shaw, PS
Li, ZG
Lykke, KR
Bishop, ML
AF Hum, Lindsay
Shaw, Ping-Shine
Li, Zhigang
Lykke, Keith R.
Bishop, Michael L.
BE Fountain, AW
Gardner, PJ
TI Ultraviolet degradation study of photomultiplier tubes at SURF III
SO CHEMICAL, BIOLOGICAL, RADIOLOGICAL, NUCLEAR, AND EXPLOSIVES (CBRNE)
SENSING X
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Chemical, Biological, Radiological, Nuclear, and
Explosives (CBRNE) Sensing X
CY APR 14-16, 2009
CL Orlando, FL
SP SPIE
DE photomultiplier tubes; ultraviolet; degradation; synchrotron radiation;
calibration
ID FLUORESCENCE; RADIOMETRY
AB Photomultiplier tubes (PMTs) are used in biological detection systems in order to detect the presence of biological warfare agents. To ensure proper operation of these biological detection systems, the performance of PMTs must be characterized in terms of their responsivity and long-term stability. We report a technique for PMT calibration at the Synchrotron Ultraviolet Radiation Facility (SURF III) at the National Institute of Standards and Technology (NIST). SURF III provides synchrotron radiation with a smooth and continuous spectrum covering the entire UV range for accurate PMT measurements. By taking advantage of the ten decade variability in the flux of the synchrotron radiation, we studied properties of commercial PMTs such as the linearity, spatial uniformity, and spectral responsivity. We demonstrate the degradation of PMTs by comparing new PMTs with PMTs that were used and operated in a biological detection system for a long period of time. The observed degradation is discussed.
C1 [Hum, Lindsay; Bishop, Michael L.] USN, Ctr Surface Warfare, Corona, CA 92878 USA.
RP Hum, L (reprint author), USN, Ctr Surface Warfare, Corona, CA 92878 USA.
EM lindsay.hum@navy.mil
NR 8
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7570-1
J9 PROC SPIE
PY 2009
VL 7304
AR 730410
DI 10.1117/12.818658
PG 8
WC Remote Sensing; Optics; Radiology, Nuclear Medicine & Medical Imaging;
Spectroscopy
SC Remote Sensing; Optics; Radiology, Nuclear Medicine & Medical Imaging;
Spectroscopy
GA BVR69
UT WOS:000292557300029
ER
PT S
AU Papantonakis, MR
Kendziora, C
Furstenberg, R
Stepnowski, SV
Rake, M
Stepnowski, J
McGill, RA
AF Papantonakis, Michael R.
Kendziora, Chris
Furstenberg, Robert
Stepnowski, Stanley V.
Rake, Matthew
Stepnowski, Jennifer
McGill, R. Andrew
BE Fountain, AW
Gardner, PJ
TI Stand-off detection of trace explosives by infrared photothermal imaging
SO CHEMICAL, BIOLOGICAL, RADIOLOGICAL, NUCLEAR, AND EXPLOSIVES (CBRNE)
SENSING X
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Chemical, Biological, Radiological, Nuclear, and
Explosives (CBRNE) Sensing X
CY APR 14-16, 2009
CL Orlando, FL
SP SPIE
DE Explosives; detection; infrared; photothermal; quantum cascade laser;
laser
ID EXCITATION
AB We have developed a technique for the stand-off detection of trace explosives using infrared photothermal imaging. In this approach, infrared quantum cascade lasers tuned to strong vibrational absorption bands of the explosive particles illuminate a surface of interest, preferentially heating the explosives material. An infrared focal plane array is used to image the surface and detect a small increase in the thermal intensity upon laser illumination. We have demonstrated the technique using TNT and RDX residues at several meters of stand-off distance under laboratory conditions, while operating the lasers below the eye-safe intensity limit. Sensitivity to explosives traces as small as a single grain (similar to 100 ng) of TNT has been demonstrated using an uncooled bolometer array. We show the viability of this approach on a variety of surfaces which transmit, reflect or absorb the infrared laser light and have a range of thermal conductivities. By varying the incident wavelength slightly, we demonstrate selectivity between TNT and RDX. Using a sequence of lasers at different wavelengths, we increase both sensitivity and selectivity while reducing the false alarm rate. At higher energy levels we also show it is possible to generate vapor from solid materials with inherently low vapor pressures.
C1 [Papantonakis, Michael R.; Kendziora, Chris; Furstenberg, Robert; Stepnowski, Stanley V.; McGill, R. Andrew] USN, Res Lab, Washington, DC 20375 USA.
RP Papantonakis, MR (reprint author), USN, Res Lab, Code 6365,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM kendziora@ccs.nrl.navy.mil
RI Papantonakis, Michael/G-3888-2012
NR 18
TC 8
Z9 8
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7570-1
J9 PROC SPIE
PY 2009
VL 7304
AR 730418
DI 10.1117/12.818752
PG 9
WC Remote Sensing; Optics; Radiology, Nuclear Medicine & Medical Imaging;
Spectroscopy
SC Remote Sensing; Optics; Radiology, Nuclear Medicine & Medical Imaging;
Spectroscopy
GA BVR69
UT WOS:000292557300034
ER
PT J
AU Groshens, TJ
Hollins, RA
AF Groshens, Thomas J.
Hollins, Richard A.
TI New chemical hydrogen storage materials exploiting the self-sustaining
thermal decomposition of guanidinium borohydride
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID ETHANE 1,2-DIAMINEBORANE; AMMONIA; BORANE
AB Guanidinium borohydride (GBH) was structurally characterized by single-crystal X-ray diffraction and found to release more than 10 wt% H(2) as a fairly pure stream during a self-sustaining thermal decomposition reaction both with and without additives that were identified to reduce the concentration of the main ammonia impurity and control the reaction sustainability.
C1 [Groshens, Thomas J.; Hollins, Richard A.] USN, Air Warfare Ctr, Weap Div, China Lake, CA 93555 USA.
RP Groshens, TJ (reprint author), USN, Air Warfare Ctr, Weap Div, China Lake, CA 93555 USA.
EM thomas.groshens@navy.mil
NR 17
TC 28
Z9 28
U1 1
U2 12
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PY 2009
IS 21
BP 3089
EP 3091
DI 10.1039/b900376b
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 448NQ
UT WOS:000266269700033
PM 19462096
ER
PT J
AU Rolison, DR
Long, JW
Lytle, JC
Fischer, AE
Rhodes, CP
McEvoy, TM
Bourga, ME
Lubers, AM
AF Rolison, Debra R.
Long, Jeffrey W.
Lytle, Justin C.
Fischer, Anne E.
Rhodes, Christopher P.
McEvoy, Todd M.
Bourga, Megan E.
Lubers, Alia M.
TI Multifunctional 3D nanoarchitectures for energy storage and conversion
SO CHEMICAL SOCIETY REVIEWS
LA English
DT Review
ID ATOMIC LAYER DEPOSITION; HETEROJUNCTION SOLAR-CELLS; HYDROUS RUTHENIUM
OXIDE; LITHIUM-ION BATTERIES; ELECTROCHEMICAL REDOX SUPERCAPACITORS;
ULTRATHIN POLY(PHENYLENE OXIDE); POLY(O-ANISIDINE) THIN-FILMS; SOLID
POLYMER ELECTROLYTES; CARBON NANOTUBES; MANGANESE OXIDE
AB The design and fabrication of three-dimensional multifunctional architectures from the appropriate nanoscale building blocks, including the strategic use of void space and deliberate disorder as design components, permits a re-examination of devices that produce or store energy as discussed in this critical review. The appropriate electronic, ionic, and electrochemical requirements for such devices may now be assembled into nanoarchitectures on the bench-top through the synthesis of low density, ultraporous nanoarchitectures that meld high surface area for heterogeneous reactions with a continuous, porous network for rapid molecular flux. Such nanoarchitectures amplify the nature of electrified interfaces and challenge the standard ways in which electrochemically active materials are both understood and used for energy storage. An architectural viewpoint provides a powerful metaphor to guide chemists and
C1 [Rolison, Debra R.; Long, Jeffrey W.; Lytle, Justin C.; Bourga, Megan E.; Lubers, Alia M.] USN, Res Lab, Surface Chem Branch, Code 6170, Washington, DC 20375 USA.
[Fischer, Anne E.] Nova Res Inc, Alexandria, VA 22308 USA.
[Rhodes, Christopher P.] Lynntech Inc, College Stn, TX 77840 USA.
[McEvoy, Todd M.] Air Prod & Chem Inc, Allentown, PA 18195 USA.
RP Rolison, DR (reprint author), USN, Res Lab, Surface Chem Branch, Code 6170, Washington, DC 20375 USA.
FU US Office of Naval Research; US Defense Applied Research Projects Agency
FX The authors gratefully acknowledge the US Office of Naval Research and
the US Defense Applied Research Projects Agency for support of our
program on multifunctional nanoarchitectures.
NR 264
TC 417
Z9 421
U1 43
U2 470
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 0306-0012
J9 CHEM SOC REV
JI Chem. Soc. Rev.
PY 2009
VL 38
IS 1
BP 226
EP 252
DI 10.1039/b801151f
PG 27
WC Chemistry, Multidisciplinary
SC Chemistry
GA 384UE
UT WOS:000261768900017
PM 19088976
ER
PT J
AU Kulp, JL
Clark, TD
AF Kulp, John L., III
Clark, Thomas D.
TI Engineering a beta-Helical D,L-Peptide for Folding in Polar Media
SO CHEMISTRY-A EUROPEAN JOURNAL
LA English
DT Review
DE beta helix; cyclic compounds; foldamers; NMR spectroscopy; peptides
ID PROTEIN SECONDARY STRUCTURE; MOLECULAR-STRUCTURE DETERMINATION;
NUCLEAR-MAGNETIC-RESONANCE; RANDOM COIL CONFORMATIONS; ALANINE-BASED
PEPTIDES; NMR-SOLUTION STRUCTURE; SOLID-PHASE SYNTHESIS; CATION-PI
INTERACTION; H-1 CHEMICAL-SHIFTS; DE-NOVO DESIGN
AB beta Helices-helices formed by alternating D,L-peptides and stabilized by beta-sheet hydrogen bonding-are found naturally in only a handful of highly hydrophobic peptides. This paper explores the scope of beta-helical structure by presenting the first design and biophysical characterization of a hydrophilic D,L-peptide, 1, that forms a beta helix in methanol. The design of 1 is based on the beta-hairpin/beta helix-a new supersecondary that had been characterized previously only for hydrophobic peptides in nonpolar solvents. Incorporating polar residues in 1 provided solubility in methanol, in which the peptide adopts the expected beta-hairpin/beta-helical structure, as evidenced by CD, analytical ultracentrifugation (AUC), NMR spectroscopy and NMR-based structure calculations. Upon titration with water (at constant peptide concentration), the structure in methanol (1m) transitions cooperatively to an extended conformation (1w) resembling a cyclic beta-hairpin; observation of an isodichroic point in the solvent-dependent CD spectra indicates that this transition is a two-state process. In contrast, neither 1m nor 1w show cooperative thermal melting; instead, their structures appear intact at temperatures as high as 65 degrees C; this observation suggests that steric constraint is dominant in stabilizing these structures. Finally, the (1)H NMR C alpha H spectroscopic resonances of 1m are down field-shifted with respect to random-coil values, a hitherto unreported property for beta helices that appears to be a general feature of these structures. These results show for the first time that an appropriately designed beta-helical peptide can fold stably in a polar solvent; furthermore, the structural and spectroscopic data reported should prove useful in the future design and characterization of water-soluble P helices.
C1 [Kulp, John L., III; Clark, Thomas D.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
RP Clark, TD (reprint author), USN, Res Lab, Div Chem, Washington, DC 20375 USA.
EM thomas.clark@nrl.navy.mil
FU Office of Naval Research; Air Force Office of Scientific Research;
American Society of Engineering Education (ASEE)
FX This work was supported by the Office of Naval Research and the Air
Force Office of Scientific Research. We thank Dr. Mallika Sastry, Dr,
Dmitri Petrovykh, and Dr. John Russell, Jr. for helpful discussions, and
Prof. John S. Evans for access to NMR instrumentation. We are also
grateful to Prof. Dr. Horst Kessler for providing a copy of the Ph.D.
thesis of Dr. Manfred Schwaiger. J.L.K. acknowledges the American
Society of Engineering Education (ASEE) for a Postdoctoral Fellowship.
NR 118
TC 7
Z9 7
U1 2
U2 18
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0947-6539
J9 CHEM-EUR J
JI Chem.-Eur. J.
PY 2009
VL 15
IS 44
BP 11867
EP 11877
DI 10.1002/chem.200901129
PG 11
WC Chemistry, Multidisciplinary
SC Chemistry
GA 523XT
UT WOS:000272109100012
PM 19784965
ER
PT B
AU Ives, RW
Bishop, DAD
Du, YZ
Belcher, C
AF Ives, Robert W.
Bishop, Daniel A. D.
Du, Yingz
Belcher, Craig
GP IEEE
TI Effects of Image Compression on Iris Recognition Performance and Image
Quality
SO CIB: 2009 IEEE WORKSHOP ON COMPUTATIONAL INTELLIGENCE IN BIOMETRICS:
THEORY, ALGORITHMS, AND APPLICATIONS
LA English
DT Proceedings Paper
CT IEEE Workshop on Computational Intelligence in Biometrics - Theory,
Algorithms and Applications
CY MAR 30-APR 02, 2009
CL Nashville, TN
SP IEEE
AB With iris recognition gaining support as one of the most accurate means of human identification, its use is expanding globally. The number of researchers developing algorithms for iris recognition is increasing, and more iris image databases are available for their research. Developing algorithms that work effectively over a wide range of conditions requires a large assortment of iris images captured under varying and extreme conditions. This means that the size of the databases from which to conduct research is increasing. This paper investigates the effects of image compression on recognition system performance using a commercial iris recognition algorithm along with JPEG-2000 compression, and links these to an image quality metric. We use the ICE iris database in this research.
C1 [Ives, Robert W.] USN Acad, Annapolis, MD 21402 USA.
[Bishop, Daniel A. D.] Georgia Inst Technol, Atlanta, GA 30332 USA.
[Du, Yingz; Belcher, Craig] Indiana Univ Purdue Univ, Indianapolis, IN 46202 USA.
RP Ives, RW (reprint author), USN Acad, Annapolis, MD 21402 USA.
EM ives@usna.edu; dabishop@ece.gatech..edu; yidu@iupui.edu;
csbelche@iupui.edu
FU National Security Agency; National Institute of Justice
[2007-DE-BX-K182]
FX This work was supported in part by the National Security Agency and the
National Institute of Justice (award number: 2007-DE-BX-K182).
NR 9
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2773-4
PY 2009
BP 16
EP +
PG 3
WC Mathematical & Computational Biology
SC Mathematical & Computational Biology
GA BLV00
UT WOS:000271116700003
ER
PT B
AU Broussard, RP
Ives, RW
AF Broussard, Randy P.
Ives, Robert W.
GP IEEE
TI Using Artificial Neural Networks and Feature Saliency to Identify Iris
Measurements that Contain the Most Discriminatory Information for Iris
Segmentation
SO CIB: 2009 IEEE WORKSHOP ON COMPUTATIONAL INTELLIGENCE IN BIOMETRICS:
THEORY, ALGORITHMS, AND APPLICATIONS
LA English
DT Proceedings Paper
CT IEEE Workshop on Computational Intelligence in Biometrics - Theory,
Algorithms and Applications
CY MAR 30-APR 02, 2009
CL Nashville, TN
SP IEEE
ID RECOGNITION
AB One of the basic challenges to robust iris recognition is iris segmentation. To represent the iris, some researchers fit circles, ellipses or active contours to the boundary pixels of the segmented iris. In order to get an accurate fit, the iris boundary must first be accurately identified. Some segmentation methods operate on a preprocessed gray-scaled image, while others use a thresholded binary edge image. The Hough transform is a popular method used to search for circular or elliptical patterns within the image. Many irises are slightly elliptical, and suffer from eyelid/eyelash occlusion, specular reflections and often the pupil and iris centers are not co-located. Each of these issues can cause a segmentation error. This research uses of a feature saliency algorithm to identify which measurements, used in common iris segmentation methods, jointly contain the most discriminatory information for identify the iris boundary. Once this feature set is identified, an artificial neural network is used to near-optimally combine the segmentation measurements to better localize and identify boundary pixels of the iris. In this approach, no assumption of circularity is assumed when identifying the iris boundary. 322 measurements were tested and eight were found to contain discriminatory information that can assist in identifying the iris boundary. For occluded images, the iris masks created by the neural network were consistently more accurate than the truth mask created using the circular iris boundary assumption.
C1 [Broussard, Randy P.] USN Acad, Weap & Syst Engn Dept, Annapolis, MD 21402 USA.
[Ives, Robert W.] USN Acad, Dept Elect & Comp Engn, Annapolis, MD 21402 USA.
RP Broussard, RP (reprint author), USN Acad, Weap & Syst Engn Dept, Annapolis, MD 21402 USA.
EM broussar@usna.edu
NR 21
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2773-4
PY 2009
BP 46
EP +
PG 2
WC Mathematical & Computational Biology
SC Mathematical & Computational Biology
GA BLV00
UT WOS:000271116700007
ER
PT B
AU Hyland, JC
Smith, CM
Stack, JR
AF Hyland, J. C.
Smith, C. M.
Stack, J. R.
GP IEEE
TI Multi-Sensor Area Coverage Analysis for Aspect-Dependent Targets
SO CIVVS: 2009 IEEE WORKSHOP ON COMPUTATIONAL INTELLIGENCE IN VEHICLES AND
VEHICULAR SYSTEMS
LA English
DT Proceedings Paper
CT IEEE Workshop on Computational Intelligence in Vehicles and Vehicular
Systems
CY MAR 30-APR 02, 2009
CL Nashville, TN
SP IEEE
AB This research investigates sensor area coverage analysis techniques for multiple sensors in applications where the probability of detection (P(d)) is a function of aspect as well as range. This is particularly appropriate for mine countermeasure (MCM) applications where many targets have asymmetric geometries and unknown orientations, poses, scour depths, etc. This research articulates two fundamental theoretical limitations in traditional area coverage analysis. First, that sensor performance is aspect independent. And second, that the target orientations observed by the search sensors are independent and uniformly distributed. Using hypothetical sensor performance, simulated MCM search scenarios clearly expose these limitations. The simulations compare the results using the new aspect-dependent techniques to those using the non-aspect-dependent techniques. By properly accounting for aspect-dependent performance, overall mission performance can be increased with no additional cost. The results of this research form a critical piece of requisite understanding towards advancing the Navy's vision of cooperative and adaptive mission execution with multiple autonomous vehicles.
C1 [Hyland, J. C.; Smith, C. M.; Stack, J. R.] USN, Ctr Surface Warfare Panama City, Panama City, FL 32407 USA.
RP Hyland, JC (reprint author), USN, Ctr Surface Warfare Panama City, 110 Vernon Ave, Panama City, FL 32407 USA.
NR 5
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4244-2770-3
PY 2009
BP 37
EP 42
PG 6
WC Computer Science, Artificial Intelligence; Transportation Science &
Technology
SC Computer Science; Transportation
GA BME49
UT WOS:000272018100006
ER
PT J
AU Offerman, S
Barry, JD
Richardson, W
Tong, T
Tanen, D
Bush, S
Clark, R
AF Offerman, Steven R.
Barry, J. David
Richardson, William H.
Tong, Tri
Tanen, Dave
Bush, Sean P.
Clark, Richard F.
TI Subcutaneous crotaline Fab antivenom for the treatment of rattlesnake
envenomation in a porcine model
SO CLINICAL TOXICOLOGY
LA English
DT Article
DE Crotaline envenomation; Antivenom; CroFab; Rattlesnake bite
ID LOXOSCELES ENVENOMATION; ATROX ENVENOMATION; OVINE ANTIVENOM;
UNITED-STATES; PRESSURE; CHILDREN; ANTIGEN; RABIES; BITES
AB Introduction. This study was designed to investigate whether the local, subcutaneous injection of Crotaline Fab antivenom (CroFab) at the rattlesnake envenomation site would result in less extremity edema when compared to intravenous (IV) antivenom infusion alone. Methods. This is a randomized, three-arm laboratory experiment using a porcine model. Each animal was anesthetized, intubated, and maintained on mechanical ventilation. About 6 mg/kg of Crotalus atrox venom was injected subcutaneously at the hock of the right hind leg. Animals were then randomized to immediately receive subcutaneous and IV antivenom (SC/IV), IV antivenom only, or saline control. SC/IV animals received two vials of CroFab subcutaneously at the envenomation site and two vials intravenously. IV animals received four vials of CroFab intravenously. Limb edema was tracked by serial circumference and volumetric measurements over an 8-h period. Limb circumference was measured at four pre-determined locations hourly. Limb volume was measured by a water displacement method at baseline, 4, and 8 h. Results. Twenty-six animals were randomized to the three treatment groups. The SC/IV and IV arms included nine animals each. Two animals in the SC/IV group died suddenly during the study, leaving seven animals for data analysis. There were eight controls. Increasing limb edema was observed in all groups. No differences were detected in limb circumferences or limb volumes between control and either treatment arms. Conclusion. In this porcine model of crotaline envenomation, no differences in limb edema were found between animals treated with SC/IV or IV CroFab when compared to saline controls.
C1 [Offerman, Steven R.] Kaiser S Sacramento, Dept Emergency Med, Sacramento, CA 95823 USA.
[Barry, J. David] Brooke Army Med Ctr, Dept Emergency Med, San Antonio, TX USA.
[Richardson, William H.] Palmetto Richland Mem Hosp, Dept Emergency Med, Columbia, SC USA.
[Tong, Tri] Univ Calif San Diego, Med Ctr, Dept Emergency Med, San Diego, CA 92103 USA.
[Tanen, Dave] USN, Med Ctr, Dept Emergency Med, San Diego, CA 92152 USA.
[Bush, Sean P.] Loma Linda Sch Med, Dept Emergency Med, Loma Linda, CA USA.
RP Offerman, S (reprint author), Kaiser S Sacramento, Dept Emergency Med, 6600 Bruceville Rd, Sacramento, CA 95823 USA.
EM steve.offerman@gmail.com
NR 26
TC 2
Z9 2
U1 0
U2 2
PU INFORMA HEALTHCARE
PI NEW YORK
PA 52 VANDERBILT AVE, NEW YORK, NY 10017 USA
SN 1556-3650
J9 CLIN TOXICOL
JI Clin. Toxicol.
PY 2009
VL 47
IS 1
BP 61
EP 68
AR PII 907912193
DI 10.1080/15563650701750613
PG 8
WC Toxicology
SC Toxicology
GA 395KW
UT WOS:000262524000011
PM 19153852
ER
PT B
AU Kriebel, DL
AF Kriebel, David L.
BE Smith, JM
TI PROBABILISTIC PERFORMANCE OF BEACH NOURISHMENT PROJECTS
SO COASTAL ENGINEERING 2008, VOLS 1-5
LA English
DT Proceedings Paper
CT 31st International Conference on Coastal Engineering
CY AUG 31-SEP 05, 2008
CL Hamburg, GERMANY
SP Hochtief Construct AG, Elastogran GmbH, Hamburg Port Author, Naue Gmbh & Co KG, Bremenports GmbH & Co KG, IMS Ingenieurgesell mbH, Inros Lackner AG, Wilhelm Ernst & Sohn Verlag Architektur & Tech Wissensch GmbH & Co KG, Enders & Duhrkop Ingenieurgesell mbH, Hafen Hamburg Marketing eV, German Fed Minist Educ & Res, Minist Agr, Envrionm & Rural Areas State Schleswig Holstein, German Port Technol Assoc, German Coastal Engn Res Council
AB A relatively simple computer model is developed to investigate the probabilistic lifetime of beach nourishment projects with the goal of estimating the probability distribution for re-nourishment intervals. The method accounts for randomness and uncertainties in the beach fill response through Monte Carlo simulation. The simulation model requires that all input variables be defined probabilistically through their mean value, standard deviation, and probability distribution type. Beach fill response is then simulated using a collection of simple analytical models for: (1) long-term background erosion, (2) seasonal erosion/accretion cycles, (3) longshore spreading of the fill using the Pelnard-Considere solution, and (4) erosion due to storms using the Kriebel and Dean analytical erosion model. Results are presented as histograms of re-nourishment interval.
C1 USN Acad, Annapolis, MD 21402 USA.
RP Kriebel, DL (reprint author), USN Acad, Stop 11D, Annapolis, MD 21402 USA.
EM kriebel@usna.edu
NR 8
TC 0
Z9 0
U1 0
U2 1
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE
BN 978-981-4277-36-5
PY 2009
BP 2507
EP 2518
PG 12
WC Engineering, Civil; Engineering, Ocean
SC Engineering
GA BKN05
UT WOS:000268630701049
ER
PT S
AU Chu, PC
Kyriakidis, K
Haeger, SD
Ward, M
AF Chu, P. C.
Kyriakidis, K.
Haeger, S. D.
Ward, M.
BE Brebbia, CA
Benassai, G
Rodriguez, GR
TI Tidal effect on chemical spills in San Diego Bay
SO COASTAL PROCESSES
SE WIT Transactions on Ecology and the Environment
LA English
DT Proceedings Paper
CT 1st International Conference on Physical Coastal Processes, Management
and Engineering
CY SEP 14-16, 2009
CL MALTA
SP Wessex Inst Technol, Univ Pharthenope, Univ Las Palmas, WIT Transact Ecol & Environm
DE San Diego Bay; water pollution; water quality management; chemical fate
model; tidal basin; chemical spill; hydrodynamic model
ID FITTED CIRCULATION MODEL; BOUNDARY; EXCHANGE; OCEAN
AB A coupled hydrodynamic-chemical spill model is used to investigate chemical spills in San Diego Bay. The hydrodynamic model shows that San Diego Bay is tidally dominated. Two different patterns of chemical spill were found with pollutants (methanol, benzene, liquefied ammonia, etc.) released at 0.5 in depth in the northern bay (32 degrees 43'N, 117 degrees 13.05'W) and in the southern bay (32 degrees 39'N, 117 degrees 07.92'W). For the north-bay release, the chemical pollutants spread in the whole basin with a fast speed of spill in the northern part (12 hours) and a slow speed of spill in the southern part (20 days) with very low concentration. For the south-bay release, the chemical pollutants are kept in the southern part. Very few pollutants reach 32 degrees 41'N parallel (the boundary between the north and south bays).
C1 [Chu, P. C.; Kyriakidis, K.] USN, Postgrad Sch, Stennis Space Ctr, MS 39529 USA.
RP Chu, PC (reprint author), USN, Postgrad Sch, Stennis Space Ctr, MS 39529 USA.
NR 10
TC 0
Z9 0
U1 1
U2 2
PU WIT PRESS/COMPUTATIONAL MECHANICS PUBLICATIONS
PI SOUTHAMPTON
PA ASHURST LODGE, ASHURST, SOUTHAMPTON SO40 7AA, ENGLAND
SN 1743-3541
BN 978-1-84564-200-6
J9 WIT TRANS ECOL ENVIR
PY 2009
VL 126
BP 27
EP 36
DI 10.2495/CP090031
PG 10
WC Ecology; Environmental Sciences; Oceanography
SC Environmental Sciences & Ecology; Oceanography
GA BNL25
UT WOS:000274847500003
ER
PT S
AU Boeneman, K
Mei, BC
Deschamps, JR
Delehanty, JB
Mattoussi, H
Medintz, I
AF Boeneman, Kelly
Mei, Bing C.
Deschamps, Jeffery R.
Delehanty, James B.
Mattoussi, Hedi
Medintz, Igor
BE Osinski, M
Jovin, TM
TI Peptide linkers for the assembly of semiconductor quantum dot
bioconjugates
SO COLLOIDAL QUANTUM DOTS FOR BIOMEDICAL APPLICATIONS IV
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Colloidal Quantum Dots for Biomedical Applications IV
CY JAN 24-26, 2009
CL San Jose, CA
SP SPIE, Ocean Opt Inc
DE FRET; peptides; alpha helices; beta-sheets; polyhistidine;
self-assembly; quantum dot; semiconductor
ID RESONANCE ENERGY-TRANSFER; RECOMBINANT PROTEIN; LIGANDS; FLUOROPHORES;
SENSORS; DONORS
AB The use of semiconductor luminescent quantum dots for the labeling of biomolecules is rapidly expanding, however it still requires facile methods to attach functional globular proteins to biologically optimized quantum dots. Here we discuss the development of controlled variable length peptidyl linkers to attach biomolecules to poly(ethylene) glycol (PEG) coated quantum dots for both in vitro and in vivo applications. The peptides chosen, beta-sheets and alpha helices are appended to polyhistidine sequences and this allows for control of the ratio of peptide bioconjugated to QD and the distance from QD to the biomolecule. Recombinant DNA engineering, bacterial peptide expression and Ni-NTA purification of histidine labeled peptides are utilized to create the linkers. Peptide length is confirmed by in vitro fluorescent resonance energy transfer (FRET).
C1 [Boeneman, Kelly; Delehanty, James B.; Medintz, Igor] USN, Ctr Bio Mol Sci & Engn, Res Lab, Washington, DC 20375 USA.
RP Boeneman, K (reprint author), USN, Ctr Bio Mol Sci & Engn, Res Lab, Washington, DC 20375 USA.
RI Gemmill, Kelly/G-2167-2012;
OI Deschamps, Jeffrey/0000-0001-5845-0010
NR 29
TC 0
Z9 0
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7435-3
J9 PROC SPIE
PY 2009
VL 7189
AR 71890G
DI 10.1117/12.808540
PG 9
WC Crystallography; Engineering, Biomedical; Nanoscience & Nanotechnology;
Optics
SC Crystallography; Engineering; Science & Technology - Other Topics;
Optics
GA BSS52
UT WOS:000285710600008
ER
PT S
AU Delehanty, JB
Bradburne, CE
Medintz, IL
Farrell, D
Pons, T
Deschamps, JR
Brunel, FM
Dawson, PE
Mattoussi, H
AF Delehanty, James B.
Bradburne, Christopher E.
Medintz, Igor L.
Farrell, Dorothy
Pons, Thomas
Deschamps, Jeffrey R.
Brunel, Florence M.
Dawson, Philip E.
Mattoussi, Hedi
BE Osinski, M
Jovin, TM
TI Intracellular Delivery of and Sensing with Quantum Dot Bioconjugates
SO COLLOIDAL QUANTUM DOTS FOR BIOMEDICAL APPLICATIONS IV
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Colloidal Quantum Dots for Biomedical Applications IV
CY JAN 24-26, 2009
CL San Jose, CA
SP SPIE, Ocean Opt Inc
DE nanoassemblies; cell-penetrating peptide; cationic liposomes; polymer;
quantum dots; endocytosis; bioconjugate; microinjection
ID TAT-FUSION PROTEINS; IN-VIVO; LIVE CELLS; MACROPINOCYTOSIS;
TRANSFECTION; ENDOCYTOSIS
AB Luminescent semiconductor quantum dots (QDs) possess several unique optical properties that suggest they will be superior reagents compared to traditional organic fluorophores for applications such as the labeling of subcellular structures and the sensing of biological processes within living cells. Chief among these properties are their 1) high quantum yields, 2) broad absorption spectra coupled with narrow symmetric, size-tunable emissions and 3) the ability to excite multiple QD populations at a single wavelength removed from emission. This latter attribute presents the exciting possibility of multiplexed or "multicolor" intracellular imaging and sensing. In order for QDs to reach their full potential as intracellular imaging and sensing reagents, however, facile and robust methodologies for delivering QDs in a controlled manner to specific subcellular locations must be developed. We have investigated a number of strategies to achieve the intracellular delivery of QDs including peptide-mediated, polymer-mediated, and microinjection based methods. In particular, the ability to selectively deliver biofunctionalized QDs to specific intracellular compartments is being targeted. Additionally, long-term QD intracellular QD fate, stability and toxicity are also concomitantly being examined. Cellular delivery experiments utilizing these various schemes will be highlighted and the relative advantages and disadvantages of each approach will be discussed.
C1 [Delehanty, James B.; Bradburne, Christopher E.; Medintz, Igor L.] USN, Ctr Bio Mol Sci & Engn, Res Lab, Washington, DC 20375 USA.
RP Delehanty, JB (reprint author), USN, Ctr Bio Mol Sci & Engn, Res Lab, Code 6900,4555 Overlook Ave SW, Washington, DC 20375 USA.
OI Deschamps, Jeffrey/0000-0001-5845-0010
NR 23
TC 0
Z9 0
U1 1
U2 9
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7435-3
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7189
AR 71890W
DI 10.1117/12.809286
PG 8
WC Crystallography; Engineering, Biomedical; Nanoscience & Nanotechnology;
Optics
SC Crystallography; Engineering; Science & Technology - Other Topics;
Optics
GA BSS52
UT WOS:000285710600017
ER
PT S
AU Medintz, IL
Pons, T
Trammell, SA
Blanco-Canosa, JB
Dawson, PE
Mattoussi, H
AF Medintz, Igor L.
Pons, Thomas
Trammell, Scott A.
Blanco-Canosa, Juan B.
Dawson, Philip E.
Mattoussi, Hedi
BE Osinski, M
Jovin, TM
TI Using Metal Complex-Labeled Peptides for Charge Transfer-Based
Biosensing with Semiconductor Quantum Dots
SO COLLOIDAL QUANTUM DOTS FOR BIOMEDICAL APPLICATIONS IV
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Colloidal Quantum Dots for Biomedical Applications IV
CY JAN 24-26, 2009
CL San Jose, CA
SP SPIE, Ocean Opt Inc
DE Semiconductor; quantum dot; metal complex; electrochemistry; charge
transfer; self-assembly; peptide; biosensing; enzyme; oxidation;
reduction
ID RESONANCE ENERGY-TRANSFER; NANOCRYSTALS; STABILITY; PROTEINS; LIGANDS
AB Luminescent colloidal semiconductor quantum dots (QDs) have unique optical and photonic properties and are highly sensitive to charge transfer in their surrounding environment. In this study we used synthetic peptides as physical bridges between CdSe-ZnS core-shell QDs and some of the most common redox-active metal complexes to understand the charge transfer interactions between the metal complexes and QDs. We found that QD emission underwent quenching that was highly dependent on the choice of metal complex used. We also found that quenching traces the valence or number of metal complexes brought into close proximity of the nanocrystal surface. Monitoring of the QD absorption bleaching in the presence of the metal complex provided insight into the charge transfer mechanism. The data suggest that two distinct charge transfer mechanisms can take place. One directly to the QD core states for neutral capping ligands and a second to surface states for negatively charged capping ligands. A basic understanding of the proximity driven charge-transfer and quenching interactions allowed us to construct proteolytic enzyme sensing assemblies with the QD-peptide-metal complex conjugates.
C1 [Medintz, Igor L.; Trammell, Scott A.] USN, Ctr Bio Mol Sci & Engn Code 6900, Res Lab, Washington, DC 20375 USA.
RP Medintz, IL (reprint author), USN, Ctr Bio Mol Sci & Engn Code 6900, Res Lab, Washington, DC 20375 USA.
EM Igor.medintz@nrl.navy.mil
NR 26
TC 0
Z9 0
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7435-3
J9 PROC SPIE
PY 2009
VL 7189
AR 71890M
DI 10.1117/12.808537
PG 8
WC Crystallography; Engineering, Biomedical; Nanoscience & Nanotechnology;
Optics
SC Crystallography; Engineering; Science & Technology - Other Topics;
Optics
GA BSS52
UT WOS:000285710600011
ER
PT S
AU Prasuhn, DE
Blanco-Canosa, JB
Vora, GJ
Mattoussi, HM
Dawson, PE
Medintz, IL
AF Prasuhn, Duane E.
Blanco-Canosa, Juan B.
Vora, Gary J.
Mattoussi, Hedi M.
Dawson, Philip E.
Medintz, Igor L.
BE Osinski, M
Jovin, TM
TI Multivalent display of DNA conjugates on semiconductor quantum dots
utilizing a novel conjugation method
SO COLLOIDAL QUANTUM DOTS FOR BIOMEDICAL APPLICATIONS IV
SE Proceedings of SPIE-The International Society for Optical Engineering
LA English
DT Proceedings Paper
CT Conference on Colloidal Quantum Dots for Biomedical Applications IV
CY JAN 24-26, 2009
CL San Jose, CA
SP SPIE, Ocean Opt Inc
DE Quantum dot; semiconductor nanocrystal; bioconjugation; nanoparticle
ID LIVE CELLS; CDSE; NANOCRYSTALS; PROTEINS; LIGANDS
AB One of the most prominent research areas in nanotechnology is the development of nanoparticle systems for biomedical applications. This is founded upon the expectation that such species could ultimately be imbued with multiple simultaneous functions, such as the presentation of a therapeutic payload or diagnostic sensor for in vivo trafficking to desired cell types. In recent years, semiconductor quantum dots (QDs) have been actively explored as novel display systems, because of their unique photophysical properties. Using an aniline-mediated hydrazone coupling, a polyhisitidine-appended peptide was derivatized with a DNA strand and successfully self-assembled to QDs, yielding nanoparticles displaying up to approximately 15 peptide/DNA conjugates. This ligation method is a viable chemistry for displaying biomolecules, because of the orthogonality of the ketone and hydrazine moieties to most biological functionality and the reaction can be performed under mild conditions in aqueous media. The modified QDs were further characterized by gel electrophoresis, and microarray studies; showing the self-assembly was successful and the DNA strands were still available for hybridization with a complement sequence.
C1 [Prasuhn, Duane E.; Vora, Gary J.; Medintz, Igor L.] USN, Ctr Bio Mol Sci & Engn Code 6900, Res Lab, Washington, DC 20375 USA.
RP Prasuhn, DE (reprint author), USN, Ctr Bio Mol Sci & Engn Code 6900, Res Lab, Washington, DC 20375 USA.
EM igor.medintz@nrl.navy.mil
NR 23
TC 0
Z9 0
U1 1
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-7435-3
J9 P SOC PHOTO-OPT INS
PY 2009
VL 7189
AR 71890I
DI 10.1117/12.808541
PG 7
WC Crystallography; Engineering, Biomedical; Nanoscience & Nanotechnology;
Optics
SC Crystallography; Engineering; Science & Technology - Other Topics;
Optics
GA BSS52
UT WOS:000285710600009
ER
PT S
AU Washburn, A
Kress, M
AF Washburn, Alan
Kress, Moshe
BA Washburn, A
Kress, M
BF Washburn, A
Kress, M
TI Generalities and Terminology
SO COMBAT MODELING
SE International Series in Operations Research & Management Science
LA English
DT Article; Book Chapter
ID ATTRITION-RATE COEFFICIENT; EXPECTED TARGET DAMAGE; MISSILE-ALLOCATION;
TERMINAL DEFENSE; MOVING-TARGET; GAME-THEORY; SEARCH; MODEL; ATTACK;
OPERATIONS
C1 [Washburn, Alan; Kress, Moshe] USN, Dept Operat Res, Postgrad Sch, Monterey, CA 93943 USA.
RP Washburn, A (reprint author), USN, Dept Operat Res, Postgrad Sch, Monterey, CA 93943 USA.
EM awashburn@nps.edu; mkress@nps.edu
NR 0
TC 15
Z9 16
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 0884-8289
BN 978-1-4419-0789-9
J9 INT SER OPER RES MAN
PY 2009
VL 134
BP 1
EP +
DI 10.1007/978-1-4419-0790-5_1
D2 10.1007/978-1-4419-0790-5
PG 21
WC Operations Research & Management Science
SC Operations Research & Management Science
GA BKX43
UT WOS:000269526900001
ER
PT B
AU Holthoff, WG
Tan, LT
Holthoff, EL
Cardone, EM
Bright, FV
AF Holthoff, William G.
Tan, Loraine T.
Holthoff, Ellen L.
Cardone, Ellen M.
Bright, Frank V.
BE Potyrailo, RA
Mirsky, VM
TI High Throughput Production and Screening Strategies for Creating
Advanced Biomaterials and Chemical Sensors
SO COMBINATORIAL METHODS FOR CHEMICAL AND BIOLOGICAL SENSORS
SE Integrated Analytical Systems
LA English
DT Article; Book Chapter
ID PEPTIDE DRUG-DELIVERY; GEL DERIVED MATERIALS; CLASS-II XEROGELS;
BIODEGRADABLE POLYMERS; THIN-FILMS; SOL-GELS; FLUORESCENCE ANISOTROPY;
POLY(LACTIC ACID); SILICA; PROTEIN
AB Development of new materials is needed for numerous applications in engineering, medical, and scientific arenas. In this chapter, we describe some of our research efforts that focus on developing strategies and tools for high throughput production and screening to create advanced biomaterials and chemical sensors. Using our developed tools, we are able to produce and screen a wide array of materials in a short period of time. In several current embodiments, the system can readily produce and fully screen 100-1,000 samples/day. Our developed automated systems can provide results with minimal user input, yet with better precision and accuracy in comparison to traditional manual methods.
C1 [Tan, Loraine T.; Cardone, Ellen M.; Bright, Frank V.] SUNY Buffalo, Dept Chem, Buffalo, NY 14260 USA.
[Holthoff, William G.] USN, Ctr Surface Warfare, Asymmetr Operat Technol Branch Z11, Joint Expeditionary Forens Program, Dahlgren, VA 22448 USA.
RP Bright, FV (reprint author), SUNY Buffalo, Dept Chem, Nat Sci Complex, Buffalo, NY 14260 USA.
EM william.holthoff@navy.mil; lttan@buffalo.edu; ecardone@buffalo.edu;
chefvb@buffalo.edu
NR 76
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-0-387-73712-6
J9 INTEGR ANAL SYST
PY 2009
BP 393
EP 417
DI 10.1007/978-0-387-73713-3_16
D2 10.1007/978-0-387-73713-3
PG 25
WC Chemistry, Analytical; Nanoscience & Nanotechnology; Instruments &
Instrumentation; Materials Science, Multidisciplinary; Remote Sensing
SC Chemistry; Science & Technology - Other Topics; Instruments &
Instrumentation; Materials Science; Remote Sensing
GA BKA87
UT WOS:000267619500016
ER
PT J
AU Kessler, DA
Short, M
AF Kessler, D. A.
Short, M.
TI Dynamics and quenching of non-premixed edge-flames in oscillatory
counterflows
SO COMBUSTION AND FLAME
LA English
DT Article
DE Edge-flames; Unsteady counterflow; Quenching; Extinction; Cellular
instabilities
ID DIFFUSION FLAMES; MIXING LAYERS; TRIPLE-FLAME; STRAIN RATES; UNSTEADY;
EXTINCTION; PROPAGATION; LAMINAR; COMBUSTION; BEHAVIOR
AB The dynamics of non-premixed edge-flames, including the generation of cellular Structures, in an unsteady, symmetric counterflow are examined for positive rates of strain. A one-step reaction is assumed, nu(gamma)F + nu(X)O -> nu(p)P, in which the oxidizer Lewis number is 1. For a variety of Damkohler numbers, we examine the edge-flame evolution for two values of the fuel Lewis Dumber Le(gamma), 0.3 and 1, and two Values of the initial Mixture fraction gamma, 0.36 and 1, representing fuel lean and stoichiometric Supply conditions. For Le(gamma) = 0.3 and gamma = 0.36, unsteady forcing can convert non-cellular edge-flames into ones containing various characteristics of near- or sub-limit cellular Structures, including drifting, splitting and stationary flame strings. The transition regimes between the different edge-flame structures are examined as a function of the amplitude and frequency of the strain rate variations in the unsteady counterflow and also as a function of the instantaneous and equivalent strain rate functions. For Le(gamma) = 0.3 and gamma = 1, while no cellular edge-flames can be generated for steady counterflows, we show that cellular structures can be observed in the presence of unsteady forcing. For Le(gamma) = 1 and gamma = 1. it is shown that unsteady forcing can significantly modify the mean propagation speeds of both ignition and failure waves. Finally, the quenching boundaries of two-dimensional edge-flames induced by the unsteady counterflow are examined for Le(gamma) = 0.3, gamma = 0.36 and Le(gamma) = 1, gamma = 1. Published by Elsevier Inc. on behalf of The Combustion Institute.
C1 [Kessler, D. A.] USN, Res Lab, Computat Phys & Fluid Dynam Lab, Washington, DC 20375 USA.
[Short, M.] Los Alamos Natl Lab, Detonat & Shock Phys Grp, Los Alamos, NM 87545 USA.
RP Kessler, DA (reprint author), USN, Res Lab, Computat Phys & Fluid Dynam Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM dakessle@lcp.nrl.navy.mil; short1@lanl.gov
FU Air Force Office of Scientific Research
FX This work was performed while D.A.K. was a member of the Department of
Theoretical and Applied Mechanics at the University of Illinois. The
authors gratefully acknowledge the Air Force Office of Scientific
Research for support for this work.
NR 41
TC 0
Z9 0
U1 1
U2 4
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 JAN
PY 2009
VL 156
IS 1
BP 73
EP 89
DI 10.1016/j.combustflame.2008.08.013
PG 17
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 394OH
UT WOS:000262455500010
ER
PT S
AU Yue, SQ
Xiao, Y
Xie, GG
AF Yue, Songqing
Xiao, Yang
Xie, Geoffrey G.
BE Slezak, D
Kim, T
Chang, ACC
Vasilakos, T
Li, MC
Sakurai, K
TI Experiments on an Election Algorithm for Decision Element Failures in 4D
Future Internet Architecture
SO COMMUNICATION AND NETWORKING
SE Communications in Computer and Information Science
LA English
DT Proceedings Paper
CT International Conference on Future Generation Communication and
Networking/International Conference on Advanced Communication and
Networking (FGCN/ACN 2009)
CY DEC 10-12, 2009
CL Jeju Isl, SOUTH KOREA
DE Future Internet; 4D architecture; Election algorithm
AB A novel 4D architecture has been presented in [1], [3] for the future Internet, advocating a decomposition of network control functions into three distinct planes: decision, dissemination, and discovery, along with a streamlined data plane, to achieve more predictable network performance. An underlying concern with the 4D architecture is that the decision making is centralized at a single entity called Decision Element (DE), whose failure may disrupt the whole network [2]. A simple approach has been proposed to increase the reliability of the system by attaching a few hot stand-by DEs to the network. These hot stand-by DEs collect information from other network elements and perform computation in the same manner as the master DE. In this work, we have created a set of experiments to verify the performance of the election algorithm based on the prototype of the 4D architecture, and experimentally evaluate the re-convergence time required for the election algorithm after a failure of the master DE.
C1 [Yue, Songqing; Xiao, Yang] Univ Alabama, Dept Comp Sci, Tuscaloosa, AL 35487 USA.
[Xie, Geoffrey G.] US Navy, Postgrad Sch, Monterey, CA 93943 USA.
RP Xiao, Y (reprint author), Univ Alabama, Dept Comp Sci, Tuscaloosa, AL 35487 USA.
EM syue@cs.ua.edu; yangxiao@ieee.org; xie@nps.edu
FU Naval Postgraduate School, via ONR; Fleet Industrial Supply Center-San
Diego (FISCSD) [N00244-08-1-0020]
FX The work was supported in parts by Naval Postgraduate School, via ONR
and Fleet Industrial Supply Center-San Diego (FISCSD), under the grant
number N00244-08-1-0020. We appreciate the help from Yan Hong of
Carnegie Mellon University who has offered the source code of 4D
Prototype and also thank those who helped us to access the emulab.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 1865-0929
BN 978-3-642-10843-3
J9 COMM COM INF SC
PY 2009
VL 56
BP 250
EP +
DI 10.1007/978-3-642-10844-0_31
PG 3
WC Computer Science, Information Systems; Computer Science, Theory &
Methods; Telecommunications
SC Computer Science; Telecommunications
GA BMW31
UT WOS:000273734600031
ER
PT S
AU Pecora, LM
Moniz, L
Nichols, J
Carroll, TL
AF Pecora, Louis M.
Moniz, Linda
Nichols, Jonathan
Carroll, Thomas L.
BE Dana, SK
Roy, PK
Kurths, J
TI A Unified Approach to Attractor Reconstruction
SO COMPLEX DYNAMICS IN PHYSIOLOGICAL SYSTEMS: FROM HEART TO BRAIN
SE Understanding Complex Systems Springer Complexity
LA English
DT Proceedings Paper
CT International Workshop on Complex Dynamics of Physiological Systems
CY FEB, 2007
CL Presidency Coll, Dept Phys, Calcutta, INDIA
HO Presidency Coll, Dept Phys
DE Attractor; time series; embedding; delay coordinates
ID TIME-SERIES; EMBEDDING DIMENSION; STRANGE ATTRACTORS; GAMMA-TEST;
DYNAMICS; CONSTRUCTION; INFORMATION; GEOMETRY; NEURONS; LENGTH
AB In the analysis of complex, nonlinear time series, scientists in a variety of disciplines have relied on a time delayed embedding of their data, i.e. attractor reconstruction. This approach has left several long-standing, but common problems unresolved in which the standard approaches produce inferior results or give no guidance at all. We propose an alternative approach that views the problem of choosing all embedding parameters as being one and the same problem addressable using a single statistical test formulated directly from the reconstruction theorems. This unified approach resolves all the main issues in attractor reconstruction.
C1 [Pecora, Louis M.] USN, Res Lab, Washington, DC 20375 USA.
[Moniz, Linda] Trinity Coll, Dept Math, Washington, DC 20017 USA.
RP Pecora, LM (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM pecora@anvil.nrl.navy.mil; Linda.Moniz@jhuapl.edu;
jonathan.nichols@nrl.navy.mil; Thoms.L.Carroll@anvil.nrl.navy.mil
OI Carroll, Thomas/0000-0002-2371-2049
NR 38
TC 2
Z9 2
U1 0
U2 1
PU SPRINGER
PI DORDRECHT
PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
SN 1860-0832
BN 978-1-4020-9142-1
J9 UNDERST COMPLEX SYST
PY 2009
BP 3
EP +
DI 10.1007/978-1-4020-9143-8_1
PG 3
WC Biophysics; Neurosciences; Physiology
SC Biophysics; Neurosciences & Neurology; Physiology
GA BIQ56
UT WOS:000262061000001
ER
PT B
AU Provencher, MT
LeClere, L
Romeo, AA
Mazzocca, AA
AF Provencher, Matthew T.
LeClere, Lance
Romeo, Anthony A.
Mazzocca, Augustus A.
BE Meislin, RJ
Halbrecht, J
TI Avoiding and Managing Complications of Surgery of the Acromioclavicular
Joint
SO COMPLICATIONS IN KNEE AND SOULDER SURGERY
LA English
DT Article; Book Chapter
ID CORACOCLAVICULAR LIGAMENT RECONSTRUCTION; DISTAL CLAVICLE RESECTION;
DACRON GRAFT MATERIAL; SURGICAL-TREATMENT; CORACOACROMIAL LIGAMENT;
BIOMECHANICAL ANALYSIS; OPERATIVE TREATMENT; STEINMANN PIN; FOLLOW-UP;
DISLOCATION
C1 [Provencher, Matthew T.] USN, Div Orthopaed Shoulder & Sports Surg, Med Ctr, San Diego, CA 92152 USA.
[Romeo, Anthony A.] Rush Univ, Dept Orthoped, Med Ctr, Chicago, IL 60612 USA.
[Mazzocca, Augustus A.] Univ Connecticut, Ctr Hlth, Frarmington, CT USA.
RP Provencher, MT (reprint author), USN, Div Orthopaed Shoulder & Sports Surg, Med Ctr, San Diego, CA 92152 USA.
EM matthew.provencher@med.navy.mil
OI Romeo, Anthony/0000-0003-4848-3411
NR 90
TC 1
Z9 3
U1 0
U2 0
PU SPRINGER-VERLAG LONDON LTD
PI GODALMING
PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY,
ENGLAND
BN 978-1-84882-202-3
PY 2009
BP 245
EP 264
DI 10.1007/978-1-84882-203-0_14
D2 10.1007/978-1-84882-203-0
PG 20
WC Orthopedics; Surgery
SC Orthopedics; Surgery
GA BKW07
UT WOS:000269452400014
ER
PT J
AU Cramer, J
Vogt, F
Booksh, KS
AF Cramer, J.
Vogt, F.
Booksh, K. S.
BE Brown, SD
Tauler, R
Walczak, B
TI Smart Sensors
SO COMPREHENSIVE CHEMOMETRICS: CHEMICAL AND BIOCHEMICAL DATA ANALYSIS, VOLS
1-4
LA English
DT Article; Book Chapter
ID EMISSION MATRIX FLUORESCENCE; 2-DIMENSIONAL WAVELET COMPRESSION;
UNCALIBRATED SPECTRAL FEATURES; MULTIVARIATE CURVE RESOLUTION; PRINCIPAL
COMPONENT ANALYSIS; PLASMON RESONANCE SENSORS; ALTERNATING
LEAST-SQUARES; VAPOR CONCENTRATION-PATHLENGTH; HYPERSPECTRAL IMAGE
CUBES; ANALYTICAL CHEMICAL-DATA
C1 [Cramer, J.] USN, Res Lab, Washington, DC 20375 USA.
[Vogt, F.] Univ Tennessee, Knoxville, TN USA.
[Booksh, K. S.] Univ Delaware, Newark, DE USA.
RP Cramer, J (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 127
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
BN 978-0-44-452701-1
PY 2009
BP C357
EP C376
PG 20
WC Chemistry, Medicinal; Pharmacology & Pharmacy
SC Pharmacology & Pharmacy
GA BCS71
UT WOS:000311292900090
ER
PT B
AU Shearer, R
Marvin, B
AF Shearer, Robert
Marvin, Brett
BE Argamon, S
Howard, N
TI Anticipating Terrorist Safe Havens from Instability Induced Conflict
SO COMPUTATIONAL METHODS FOR COUNTERTERRORISM
LA English
DT Article; Book Chapter
AB This chapter presents recent methods developed at the Center for Army Analysis to classify patterns of nation-state instability that lead to conflict. The ungoverned areas endemic to failed nation-states provide terrorist organizations with safe havens from which to plan and execute terrorist attacks. Identification of those states at risk for instability induced conflict should help to facilitate effective counter terrorism policy planning efforts. Nation-states that experience instability induced conflict are similar in that they share common instability factors that make them susceptible to experiencing conflict. We utilize standard pattern classification algorithms to identify these patterns. First, we identify features (political, military, economic and social) that capture the instability of a nation-state. Second, we forecast the future levels of these features for each nation-state. Third, we classify each future state's conflict potential based upon the conflict level of those states in the past most similar to the future state.
C1 [Shearer, Robert] USN, Postgrad Sch, Monterey, CA USA.
[Marvin, Brett] Sentia Grp Inc, Washington, DC USA.
RP Shearer, R (reprint author), USN, Postgrad Sch, Monterey, CA USA.
EM rlsheare@nps.edu; blm@sentiagroup.com
NR 12
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
BN 978-3-642-01140-5
PY 2009
BP 229
EP 248
DI 10.1007/978-3-642-01141-2_12
D2 10.1007/978-3-642-01141-2
PG 20
WC Computer Science, Information Systems; Computer Science, Theory &
Methods; Criminology & Penology
SC Computer Science; Criminology & Penology
GA BKW86
UT WOS:000269491800012
ER
EF