FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Zirino, A Mathewson, JH AF Zirino, A Mathewson, JH TI A perspective look at the chemistry of oceans and estuaries SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN COMMAND,CONTROL & OCEAN SURVEILLANCE CTR,RDT&E DIV,SAN DIEGO,CA 92152. SAN DIEGO STATE UNIV,DEPT CHEM,SAN DIEGO,CA 92182. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 5 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48200272 ER PT J AU Bart, JC Hoffman, KE Judd, LL Wilkens, AM Kusterbeck, AW AF Bart, JC Hoffman, KE Judd, LL Wilkens, AM Kusterbeck, AW TI Detection of explosives in groundwater samples using a continuous flow immunosensor SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 15 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202376 ER PT J AU Swider, KE Rolison, DR AF Swider, KE Rolison, DR TI Platinum-catalyzed desulfurization of vulcan carbon: Implications for supported catalysts and electrocatalysts. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,SURFACE CHEM BRANCH,WASHINGTON,DC 20375. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 15 EP CATL PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48502010 ER PT J AU Reynolds, PJ AF Reynolds, PJ TI Recent progress in QMC and VMC treatment of molecules. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV MILAN,DIPARTIMENTO CHIM FIS & ELETTROCHIM,MILAN,ITALY. GEORGETOWN UNIV,DEPT PHYS,WASHINGTON,DC 20057. OFF NAVAL RES,DIV PHYS SCI,ARLINGTON,VA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 19 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202210 ER PT J AU Famini, GR Lowrey, AH Wilson, LY AF Famini, GR Lowrey, AH Wilson, LY TI Using molecular orbital based parameters to predict properties SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USA,EDGEWOOD RES,CTR DEV & ENGN,ABERDEEN PROVING GROUND,MD 21010. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. LA SIERRA UNIV,DEPT CHEM,RIVERSIDE,CA 92515. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 24 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202215 ER PT J AU Massie, SP AF Massie, SP TI They, too, must cross in the twilight dim. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN ACAD,ANNAPOLIS,MD 21602. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 30 EP CHED PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48201042 ER PT J AU Snow, AW Buckley, LJ AF Snow, AW Buckley, LJ TI Fluoromethylene cyanate ester resins SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 32 EP PMSE PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501687 ER PT J AU Buckley, LJ Snow, AW AF Buckley, LJ Snow, AW TI Low dielectric constant fluoromethylene cyanate esters for electronic packaging and interconnects SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 37 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501264 ER PT J AU Donner, BL ShriverLake, LC Ligler, FS AF Donner, BL ShriverLake, LC Ligler, FS TI On-site detection of TNT in groundwater using a portable fiber optic immunosensor SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 40 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202401 ER PT J AU Tullos, GL Snow, AW Buckley, LJ Eashoo, M AF Tullos, GL Snow, AW Buckley, LJ Eashoo, M TI Fluoromethylene oxy diacetylene fiber forming polymers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 40 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501267 ER PT J AU Sundar, RA Keller, TM AF Sundar, RA Keller, TM TI Synthesis and characterization of linear oxidatively stable bis(dimethylsilyl)phenyl/carborane-diacetylene copolymers SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,MAT CHEM BRANCH,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 47 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501274 ER PT J AU Pande, SG AF Pande, SG TI Effect of additives on jet fuel thermal stability determined using the gravimetric JFTOT. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. GEOCENTERS INC,FT WASHINGTON,MD 20744. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 53 EP PETR PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48500896 ER PT J AU Pande, SG AF Pande, SG TI Comparison of the effects of aging conditions and type of soluble copper used on JP-5 fuel thermal stability. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 67 EP PETR PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48500910 ER PT J AU Brady, RF AF Brady, RF TI Formulations and field performance of fluorinated polyurethane coatings. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,MAT CHEM BRANCH,WASHINGTON,DC 20307. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 71 EP PMSE PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501726 ER PT J AU Shang, RS Kitanidis, PK Orwin, E Hopkins, GD Beller, HR LeBron, CA AF Shang, RS Kitanidis, PK Orwin, E Hopkins, GD Beller, HR LeBron, CA TI In situ BTEX biotransformation under intrinsic and nitrate- and sulfate-reducing conditions SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 STANFORD UNIV,STANFORD,CA 94305. USN,NAVAL FACIL ENGN SERV CTR,PORT HUENEME,CA 93043. RI Beller, Harry/H-6973-2014 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 71 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202432 ER PT J AU Pong, RGS Flom, SR Shirk, JS Bartoli, FJ Boyle, ME Snow, AW AF Pong, RGS Flom, SR Shirk, JS Bartoli, FJ Boyle, ME Snow, AW TI Nonlinear absorption in lead phthalocyanines. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 72 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501000 ER PT J AU McClean, RE Campbell, ML Goodwin, RH AF McClean, RE Campbell, ML Goodwin, RH TI Depletion kinetics of Mo(a(7)s(3),a(5)s(2),a(5)D(J)) by N-2, SO2, CO2, N2O, and NO. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN ACAD,DEPT CHEM,ANNAPOLIS,MD 21402. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 84 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501012 ER PT J AU Mushrush, GW Beal, EJ Stalick, WM Basu, S AF Mushrush, GW Beal, EJ Stalick, WM Basu, S TI Acetals and ketals of reduced sugars as fuel system icing inhibitor additives SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,TECHNOL CTR SAFETY & SURVIVABIL,FUELS SECT,WASHINGTON,DC 20375. GEORGE MASON UNIV,FAIRFAX,VA 22030. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 85 EP PETR PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48500928 ER PT J AU Campbell, ML Metzger, JR AF Campbell, ML Metzger, JR TI Kinetic study of the reaction of Fe(a(5)D(J)) with N2O from 398 to 620 K. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN ACAD,DEPT CHEM,ANNAPOLIS,MD 21402. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 86 EP PHYS PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501014 ER PT J AU Monshipouri, M Montgomery, MT Price, RR Gaber, BP AF Monshipouri, M Montgomery, MT Price, RR Gaber, BP TI Optimization of physiological state of petroleum degrading bacteria prior to alginate entrapment SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 98 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202459 ER PT J AU Wingfield, BH Lieberman, SH AF Wingfield, BH Lieberman, SH TI In situ subsurface detection of fuel products in soils: Comparison of excitation at 308 nm versus 337 nm. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF SAN DIEGO,DEPT CHEM,LA JOLLA,CA 92093. USN,NAVAL COMMAND,CONTROL & SURVEILLANCE CTR,RES DEV TEST & EVALUAT DIV,SAN DIEGO,CA 92152. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 113 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202474 ER PT J AU Leung, CL Leung, KC AF Leung, CL Leung, KC TI Galvanic corrosion resistant imides. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 POLYCOMP TECHNOL INC,DEL MAR,CA 92014. USN,AIR WARFARE CTR,WARMINSTER,PA 18974. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 206 EP PMSE PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501861 ER PT J AU Florio, G Belli, S AF Florio, G Belli, S TI On copper in seawater: A model for metal speciation in a complex matrix. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 VASSAR COLL,DEPT CHEM,POUGHKEEPSIE,NY 12601. USN,RDT&E DIV,CONTROL & OCEAN SURVEILLANCE CTR,SAN DIEGO,CA 92152. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 223 EP CHED PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48201235 ER PT J AU Qian, X Ramaker, DE AF Qian, X Ramaker, DE TI Direct evidence for Zn(OH)4(2-) - Cation pair interaction from Zn K-edge NEXAFS data; Understanding the role of Li+ ion in improving Zn electrodes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 GEORGE WASHINGTON UNIV,DEPT CHEM,WASHINGTON,DC 20052. USN,RES LAB,SURFACE CHEM BRANCH,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 227 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501160 ER PT J AU Howell, BF AF Howell, BF TI Pigmented coatings cured with visible light. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,CTR SURFACE WARFARE,CARDEROCK DIV,ANNAPOLIS,MD 21402. SPECTRA GRP LTD,MAUMEE,OH 43537. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 229 EP PMSE PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501884 ER PT J AU Eashoo, M Buckley, LJ AF Eashoo, M Buckley, LJ TI Low dielectric constant fibers from a fluorinated polyimide for electronic packaging. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NASA,LANGLEY RES CTR,HAMPTON,VA 23681. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 313 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501540 ER PT J AU Hu, HSW Griffith, JR Buckley, LJ Snow, AW AF Hu, HSW Griffith, JR Buckley, LJ Snow, AW TI Hydrosilylation cured fluoropolymers with low dielectric constants SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 314 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501541 ER PT J AU Bitterwolf, TE Saygh, AA Bays, JT Shade, JE Rheingold, AL Yap, G LableSands, LM AF Bitterwolf, TE Saygh, AA Bays, JT Shade, JE Rheingold, AL Yap, G LableSands, LM TI pi-allyl to sigma-allyl photochemical rearrangements as precursors to C-H activation SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV IDAHO,DEPT CHEM,MOSCOW,ID 83843. USN ACAD,DEPT CHEM,ANNAPOLIS,MD 21402. UNIV DELAWARE,DEPT CHEM,NEWARK,DE. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 361 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203380 ER PT J AU Roberts, RD Friedli, AC Calvert, JM AF Roberts, RD Friedli, AC Calvert, JM TI Photo- and solution chemistry of 11-phenylundecylsiloxane films. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. MIDDLE TENNESSEE STATE UNIV,DEPT CHEM,MURFREESBORO,TN 37132. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 389 EP CHED PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48201401 ER PT J AU Fumanti, RL Dillner, DK Lomax, JF AF Fumanti, RL Dillner, DK Lomax, JF TI Novel polar-substituted organic diphosphonate. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN ACAD,DEPT CHEM,ANNAPOLIS,MD 21402. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 539 EP CHED PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48201553 ER PT J AU Purdy, AP George, CF AF Purdy, AP George, CF TI Solvothermal synthesis and transport of sulfide materials SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 617 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203634 ER PT J AU Karpen, JT Antiochos, SK DeVore, CR AF Karpen, JT Antiochos, SK DeVore, CR TI Reconnection-driven current filamentation in solar arcades SO ASTROPHYSICAL JOURNAL LA English DT Article DE methods, numerical; MHD; plasmas; Sun, magnetic fields ID MAGNETIC RECONNECTION; TOPOLOGY; CORONA; ENERGY; FLUX AB We present numerical simulations of the interaction between two bipoles through magnetic reconnection in the lower solar atmosphere, a process believed to be the origin of many manifestations, of solar activity. The present work differs from previous studies in that the field is sheared asymmetrically and that the bipoles have markedly unequal field strengths. Our key discovery is that, under such common circumstances, reconnection leads to an apparently random distribution of shear in the magnetic field, resulting in numerous current sheets throughout the volume occupied by the reconnected field lines. To our knowledge, this is the first example of a numerical simulation yielding current sheets over a large but well-defined volume of the corona, resembling a coronal loop in profile. In this Letter, we demonstrate this process of reconnection-driven current filamentation and discuss ramifications for coronal heating and structure. C1 USN, RES LAB, COMPUTAT PHYS & FLUID DYNAM LAB, WASHINGTON, DC 20375 USA. RP USN, RES LAB, EO HULBURT CTR SPACE RES, CODE 7670, WASHINGTON, DC 20375 USA. RI Karpen, Judith/E-1484-2012; Antiochos, Spiro/D-4668-2012; DeVore, C/A-6067-2015 OI Antiochos, Spiro/0000-0003-0176-4312; DeVore, C/0000-0002-4668-591X NR 29 TC 28 Z9 28 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 1996 VL 460 IS 1 BP L73 EP + PN 2 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TZ367 UT WOS:A1996TZ36700018 ER PT J AU Dulcey, CS Georger, JH Chen, MS McElvany, SW OFerrall, CE Benezra, VI Calvert, JM AF Dulcey, CS Georger, JH Chen, MS McElvany, SW OFerrall, CE Benezra, VI Calvert, JM TI Photochemistry and patterning of self-assembled monolayer films containing aromatic hydrocarbon functional groups SO LANGMUIR LA English DT Article ID SELECTIVE ELECTROLESS METALLIZATION; COPLANAR MOLECULAR ASSEMBLIES; LITHOGRAPHY; SURFACES; SILICON; GOLD AB The deep ultraviolet (lambda < similar to 250 nm) photochemistry of chemisorbed organosilane self-assembled films of the type R(CH2)(n)SiO-surface where n = 0, 1, 2 and R = phenyl, naphthyl, or anthracenyl is explored. Photochemistry is examined using 193 and 248 nm laser irradiation as well as deep ultraviolet lamp sources. It is demonstrated for a variety of systems, including single and multiple rings as well as heterocycles, that the primary photochemical mechanism is cleavage of the Si-C bond. Photocleavage of the organic group generates a polar, wettable silanol surface that is amenable to subsequent remodification by organosilane chemisorption, allowing the fabrication of high-resolution patterns of chemical functional groups in a single molecular plane. The use of patterned monolayers as templates of reactivity for subsequent selective chemical reactions is demonstrated. C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. GEOCENTERS INC,FT WASHINGTON,MD 20744. NR 52 TC 76 Z9 76 U1 3 U2 17 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD MAR 20 PY 1996 VL 12 IS 6 BP 1638 EP 1650 DI 10.1021/la9509514 PG 13 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA UB634 UT WOS:A1996UB63400037 ER PT J AU Kwon, YW Aygunes, H AF Kwon, YW Aygunes, H TI Dynamic finite element analysis of laminated beams with delamination cracks using contact impact conditions SO COMPUTERS & STRUCTURES LA English DT Article ID COMPOSITE-MATERIALS; STRESS AB A new finite element modeling technique is presented to investigate the static and dynamic behavior of laminated composite beams with partial delamination. In this study, a recently developed rectangular beam element is used. The element has lateral and axial displacements as degrees of freedom, but not rotation. For simplicity, linear shape functions are used for the beam element. As a result, the element has six degrees of freedom, four of which are the axial nodal displacements at the corner points and the other two are the lateral displacments at the ends. In addition, contact-impact conditions are applied to the finite element modeling to avoid overlapping of the upper and lower portions of a delaminated section. The numerical study shows that, depending on existence of an embedded delamination crack and its size, the response is different for a beam with a crack and subjected to a short impulse load. Hence, the present modeling technique may be used for detection of an embedded delamination crack. RP Kwon, YW (reprint author), USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943, USA. NR 18 TC 13 Z9 13 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0045-7949 J9 COMPUT STRUCT JI Comput. Struct. PD MAR 17 PY 1996 VL 58 IS 6 BP 1161 EP 1169 DI 10.1016/0045-7949(95)00202-2 PG 9 WC Computer Science, Interdisciplinary Applications; Engineering, Civil SC Computer Science; Engineering GA TN345 UT WOS:A1996TN34500010 ER PT J AU Deschamps, JR George, C FlippenAnderson, JL AF Deschamps, JR George, C FlippenAnderson, JL TI A diacetylmorphine polymorph SO ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS LA English DT Article AB The title compound, 7,8-didehydro-4,5-epoxy-17-methylmorphinan-3,6-diyl diacetate, C21H23NO5, was crystallized from a solution of its hydrochloride and sodium acetate, Unlike prior reports in which crystals were hexagonal shaped (orthorhombic) and in space group P2(1)2(1)2(1), the crystals in the present determination grew as large prisms (monoclinic) and were in space group P2(1). RP Deschamps, JR (reprint author), USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375, USA. OI Deschamps, Jeffrey/0000-0001-5845-0010 NR 4 TC 3 Z9 3 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-2701 J9 ACTA CRYSTALLOGR C JI Acta Crystallogr. Sect. C-Cryst. Struct. Commun. PD MAR 15 PY 1996 VL 52 BP 698 EP 700 DI 10.1107/S0108270195013503 PN 3 PG 3 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA UF187 UT WOS:A1996UF18700090 PM 9004734 ER PT J AU Chen, J Cargill, PJ Palmadesso, PJ AF Chen, J Cargill, PJ Palmadesso, PJ TI Real-time identification and prediction of geoeffective solar wind structures SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID DISTURBANCES; STORMS; SHOCK AB A feature-based classification technique is applied to the analysis of solar wind properties upstream of the Earth to predict the occurrence, duration, and magnitude of magnetic structures that can cause large geomagnetic storms. Because this method is based on identifiable physical features, it is highly upgradable by either analyzing data or physical models. The formulation of the technique is discussed and is then applied to two relatively ''simple'' solar wind events leading to large storms. The introduction of additional features to classify more ''complicated'' events is discussed to illustrate the upgradability. RP Chen, J (reprint author), USN,RES LAB,DIV PLASMA PHYS,CODE 6790,WASHINGTON,DC 20375, USA. NR 14 TC 16 Z9 16 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD MAR 15 PY 1996 VL 23 IS 6 BP 625 EP 628 DI 10.1029/96GL00472 PG 4 WC Geosciences, Multidisciplinary SC Geology GA UD379 UT WOS:A1996UD37900006 ER PT J AU Frankel, MY Belenky, GL Luryi, S Carruthers, TF Dennis, ML Cho, AY Hamm, RA Sivco, DL AF Frankel, MY Belenky, GL Luryi, S Carruthers, TF Dennis, ML Cho, AY Hamm, RA Sivco, DL TI Carrier dynamics and photodetection in charge injection transistors SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SPACE-TRANSFER TRANSISTORS; ELECTRON-TRANSFER; DEVICES; LOGIC; GAAS; SEMICONDUCTORS AB We study picosecond carrier transport dynamics induced by 200 fs 1.55 mu m optical pulses in charge injection transistor structures. We propose and demonstrate a new optoelectronic method for exploring the interactions of hot majority carriers and cold minority carriers, as well as the optical control of real space transfer in these devices. The minority holes photogenerated in the channel produce substantial cooling of the hot-electron majority carriers and lead to the reduction of the real space transfer. The new method also provides a direct measure of the minority carrier lifetime in the transistor channel. These effects are demonstrated in InGaAs-channel devices with both InAlAs and InP barriers. The similarities in the device characteristics are explained in terms of the interaction of photogenerated minority holes with majority electrons in the channel leading to a photoconductor-like drain current and to a reduction in the real space transfer collector current. The differences are attributed to the different conduction and valence band energy offsets between the wide band gap barrier and the low band gap collector and channel layers. Furthermore, the InAlAs-barrier device shows a capability of serving as a practical photodetector with the measured, system-limited recovery speed of similar to 5 ps. (C) 1996 American Institute of Physics. C1 SUNY STONY BROOK,STONY BROOK,NY 11794. AT&T BELL LABS,MURRAY HILL,NJ 07974. RP Frankel, MY (reprint author), USN,RES LAB,CODE 5670,WASHINGTON,DC 20375, USA. NR 25 TC 1 Z9 1 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 15 PY 1996 VL 79 IS 6 BP 3312 EP 3317 DI 10.1063/1.361231 PG 6 WC Physics, Applied SC Physics GA TZ729 UT WOS:A1996TZ72900076 ER PT J AU McPhee, MG Stanton, TP AF McPhee, MG Stanton, TP TI Turbulence in the statically unstable oceanic boundary layer under Arctic leads SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article ID SEA; ICE AB Measurements of turbulent stress, heat flux, salinity flux, and turbulent kinetic energy (TKE) dissipation were made in the oceanic boundary layer under freezing leads during the 1992 Lead Experiment project in the Arctic Ocean north of Alaska. Results from two instrument systems, one comprising a vertical array of four turbulence-measuring instrument clusters, the other an automated, loose-tethered microstructure profiler, show that forcing by modest surface fluxes (surface friction velocity u*(0) similar to 0.7 cm s(-1), surface buoyancy flux (w'b')(0) similar to -0.7 x 10(-7) W kg(-1)) substantially changes the scales and character of boundary layer turbulence relative to forcing by stress alone. Despite continuous freezing at the surface a diurnal cycle of heating and cooling of the mixed layer was seen, with downward oceanic heat flux as high as 70 W m(-2) observed at middepth in the mixed layer near solar noon. Heat flux was determined both by direct eddy covariance of temperature and vertical velocity at fixed levels and from TKE and thermal dissipation estimates from the profiling instrument, with reasonable agreement. Similarly, there was close correspondence between TKE dissipation estimates obtained from inertial subrange spectral levels at the fixed instruments and from microstructure shear profiles. TKE production was dominated by buoyancy flux through most of the boundary layer. Thermal and saline eddy diffusivities were computed from directly measured fluxes and mixed layer temperature and salinity gradients, with mean values of 0.046 and 0.049 m(2) s(-1) for temperature and salinity, respectively. Kolmogorov constants for relating thermal and saline dissipations to inertial subrange spectral levels were found to be 0.9 and 1.0, respectively, but with large scatter. C1 USN,POSTGRAD SCH,MONTEREY,CA 93943. RP McPhee, MG (reprint author), MCPHEE RES CO,450 CLOVER SPRINGS RD,NACHES,WA 98937, USA. NR 23 TC 36 Z9 36 U1 0 U2 4 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-OCEANS JI J. Geophys. Res.-Oceans PD MAR 15 PY 1996 VL 101 IS C3 BP 6409 EP 6428 DI 10.1029/95JC03842 PG 20 WC Oceanography SC Oceanography GA UA574 UT WOS:A1996UA57400007 ER PT J AU Hallock, ZR Teague, WJ AF Hallock, ZR Teague, WJ TI Evidence for a North Pacific Deep Western Boundary Current SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article AB Four current meter moorings arrayed across the Japan Trench near 35 degrees N yielded 2 years of deep current velocities in the vicinity of the Kuroshio where it separates from the Japanese coast. One- and 2-year means are interpreted in the context of other observations, including concurrent hydrography, as well as the results of earlier investigations. Principal findings are as follows: the presence of a persistent, southward deep western boundary current (1-2 cm s(-1)) along the slope (2000-4000 m) inshore of the Japan Trench; a generally northward deep flow (similar to 4 cm s(-1)) over the trench, beneath the Kuroshio; and southward and eastward deep flows farther southeast of the Kuroshio separation. These deep, mean flows, particularly the one inshore of the Japan Trench, may be partly of thermohaline origin. Eddy-driven local recirculations and bottom intensification are also likely. RP USN, RES LAB, CODE 7332, BAY ST LOUIS, MS 39529 USA. NR 27 TC 27 Z9 28 U1 0 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 MAR 15 PY 1996 VL 101 IS C3 BP 6617 EP 6624 DI 10.1029/95JC03714 PG 8 WC Oceanography SC Oceanography GA UA574 UT WOS:A1996UA57400021 ER PT J AU Palmer, LD Saha, B Hodes, RJ Abe, R AF Palmer, LD Saha, B Hodes, RJ Abe, R TI The role of CD28 costimulation in immune-mediated responses against mouse mammary tumor viruses SO JOURNAL OF IMMUNOLOGY LA English DT Article ID CELL ANTIGEN RECEPTOR; SIGNAL TRANSDUCTION; LYMPHOCYTES-T; CLASS-II; B-CELLS; SUPERANTIGEN; INFECTION; PROLIFERATION; INTERLEUKIN-2; STIMULATION AB Infectious mouse mammary tumor viruses (MMTV) encode superantigens (SAg) which, when presented in association with permissive class II MHC molecules, are recognized by those T cells that express appropriate TCRs. Recent findings have indicated that expression of a permissive MHC class II product and of a specific TCR are also critical to susceptibility of newborn mice to infection with milk-borne MMTV, suggesting that SAg-mediated T cell activation may play a facilitating role in viral infection. Because effective Ag-specific T cell activation can require costimulatory signals in addition to TCR-mediated recognition, the role of the CD28 costimulatory receptor was analyzed in responses of neonatal and adult mice to MMTV challenge. Mice that were deficient in CD28 expression as a result of gene targeting were compared with CD28-intact littermates, In response to parenteral challenge with MMTV, CD28-deficient adult mice exhibited reduced expansion of MMTV SAg-reactive T cells in draining LNs, decreased cytokine production, and decreased B cell activation and Ig secretion, These results indicate that optimal T and B cell responses to MMTV challenge, as reflected in the parameters measured, are CD28 dependent, In contrast, CD28 absence did not impair TCR-V beta-specific clonal deletion induced by neonatal exposure to MMTV, Further, analysis of susceptibility to viral infection in neonatally exposed mice revealed that CD28 deficiency did not interfere with SAg-dependent MMTV infection, Failure to identify CD28 dependence of MMTV infection suggests either the absence of a costimulatory requirement in the events that lead to viral infection or a redundancy in costimulatory signals that support infection. C1 USN,MED RES INST,IMMUNE CELL BIOL PROGRAM,BETHESDA,MD 20889. SCI UNIV TOKYO,RES INST BIOL SCI,TOKYO 162,JAPAN. NIA,NIH,BETHESDA,MD 20892. RP Palmer, LD (reprint author), NCI,NIH,DCBDC,EIB,BLDG 10,ROOM 4B10,10 CTR DR,MSC1360,BETHESDA,MD 20892, USA. NR 39 TC 16 Z9 16 U1 0 U2 0 PU AMER ASSOC IMMUNOLOGISTS PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0022-1767 J9 J IMMUNOL JI J. Immunol. PD MAR 15 PY 1996 VL 156 IS 6 BP 2112 EP 2118 PG 7 WC Immunology SC Immunology GA TZ281 UT WOS:A1996TZ28100012 PM 8690899 ER PT J AU Pickett, WE Singh, DJ AF Pickett, WE Singh, DJ TI Density-functional description of the electronic structure of LaMO(3) (M=Sc, Ti, V, Cr, Mn, Fe, Co, Ni) SO PHYSICAL REVIEW B LA English DT Letter AB Pari et al. reported that local spin density approximation (LSDA) calculations failed to predict the insulating ground state for (cubic) LaMnO3. We point out that the observed antiferromagnetic state is insulating and is lower in energy than obvious competing phases when the distorted orthorhombic structure is taken into account. Thus there is no evident problem with the predictions of LSDA for this compound. RP Pickett, WE (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Singh, David/I-2416-2012 NR 3 TC 4 Z9 4 U1 0 U2 7 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1996 VL 53 IS 11 BP 7550 EP 7550 DI 10.1103/PhysRevB.53.7550 PG 1 WC Physics, Condensed Matter SC Physics GA UC740 UT WOS:A1996UC74000103 ER PT J AU Haftel, MI Rosen, M Franklin, T Hettermann, M AF Haftel, MI Rosen, M Franklin, T Hettermann, M TI Molecular-dynamics investigation of early film growth of Pt/Au(100) and Au/Pt(100) and an interdiffusive growth mode SO PHYSICAL REVIEW B LA English DT Article ID SCANNING-TUNNELING-MICROSCOPY; BILAYER GROWTH; ULTRATHIN FE; AU; AG(110); SURFACE; MORPHOLOGY; CU(100) AB We simulate the early vapor deposition of Pt on reconstructed Au(100), and also Au on reconstructed Pt(100), with surface-embedded-atom-method potentials and the molecular-dynamics code DAMSEL utilizing simulated annealing. The early growth of Pt/Au(100) exhibits a type of interdiffusive growth where the Pt burrows into the Au substrate, forming a bumpy, mounded surface. The predicted growth is a consequence of the pliable nature of the reconstructed Au(100) substrate, and the ease with which it accommodates interlayer replacement diffusion. For Au/Pt(100), in agreement with low-energy electron-diffraction analyses, Au loses its quasihexagonal reconstruction at about 0.5-ML coverage, whereupon it grows layer by layer on Pt(100), pseudomorphic with the Pt(100) bulklike substrate, until a quasihexagonal reconstruction reappears at 2 ML. RP Haftel, MI (reprint author), USN,RES LAB,CODE 6651,WASHINGTON,DC 20375, USA. NR 18 TC 16 Z9 16 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1996 VL 53 IS 12 BP 8007 EP 8014 DI 10.1103/PhysRevB.53.8007 PG 8 WC Physics, Condensed Matter SC Physics GA UC947 UT WOS:A1996UC94700069 ER PT J AU Buckley, LJ Eashoo, M AF Buckley, LJ Eashoo, M TI Polypyrrole-coated fibers as microwave and millimeterwave obscurants SO SYNTHETIC METALS LA English DT Article DE polypyrrole; fibers; obscurants ID FILMS; DEGRADATION; STABILITY; KINETICS; COMPLEX AB Microwave and millimeterwave obscurants based on typical millimeterwave materials do not environmentally degrade with respect to their physical and electrical properties. The use of conductive polymer-coated films and fibers with inherent environmental instabilities are being investigated as possible alternatives. Achieving the optimum electrical performance is highly dependent upon the polymer/dopant combination, deposition conditions, morphology and volume of the coating that is used. The electrical performance can be assessed by complex permittivity analysis and this was performed on samples of compacted conductive polymer powders. Several conductive polymer-coated fiber systems were also investigated via thermal analysis. The effects of processing conditions on performance and stability were studied. RP Buckley, LJ (reprint author), USN,RES LAB,CHEM DIV CODE 6125,WASHINGTON,DC 20375, USA. NR 27 TC 36 Z9 36 U1 1 U2 6 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0379-6779 J9 SYNTHETIC MET JI Synth. Met. PD MAR 15 PY 1996 VL 78 IS 1 BP 1 EP 6 DI 10.1016/0379-6779(95)03561-3 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter; Polymer Science SC Materials Science; Physics; Polymer Science GA UM370 UT WOS:A1996UM37000001 ER PT J AU Dennis, ML Duling, IN Burns, WK AF Dennis, ML Duling, IN Burns, WK TI Inherently bias drift free amplitude modulator SO ELECTRONICS LETTERS LA English DT Article DE integrated optics; optical modulation; light interferometers ID DEVICES AB The authors demonstrate an inherently bias drift free broadband amplitude modulator design based on an integrated optic travelling wave phase modulator in a fibre Sagnac interferometer. Operation is demonstrated over 0.5-20GHz, and the bias is shown to be stable to better than 1 degrees over a temperature range of 28 degrees C. RP Dennis, ML (reprint author), USN,RES LAB,CODE 5671,WASHINGTON,DC 20375, USA. NR 12 TC 35 Z9 37 U1 0 U2 2 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD MAR 14 PY 1996 VL 32 IS 6 BP 547 EP 548 DI 10.1049/el:19960183 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA UL772 UT WOS:A1996UL77200031 ER PT J AU Jaime, M Salamon, MB Pettit, K Rubinstein, M Treece, RE Horwitz, JS Chrisey, DB AF Jaime, M Salamon, MB Pettit, K Rubinstein, M Treece, RE Horwitz, JS Chrisey, DB TI Magnetothermopower in La0.67Ca0.33MnO3 thin films SO APPLIED PHYSICS LETTERS LA English DT Article AB We have measured the thermopower S(T,H) and resistivity rho(T,H) of laser ablated La0.67Ca0.33MnO3 films, as a function of temperature and external magnetic field. On heating. a metal-insulator transition occurs at temperatures below The resistivity peak, observed via a jump between a low T regime, where S proportional to T, and a high T regime, where S proportional to 1/T. An applied magnetic field shifts the transition in a postannealed sample to higher temperatures, causing a giant magnetothermopower effect 100x(S-8T - S-0T)/S-8T = -1400%. Both S(T) and rho(T) are activated at high temperatures, but with significantly different activation energies. We interpret this as an evidence of small polarons at high temperatures. (C) 1996 American Institute of Physics. C1 USN,RES LAB,WASHINGTON,DC 20375. RP Jaime, M (reprint author), UNIV ILLINOIS,DEPT PHYS,1110 W GREEN ST,URBANA,IL 61801, USA. RI Jaime, Marcelo/F-3791-2015 OI Jaime, Marcelo/0000-0001-5360-5220 NR 12 TC 152 Z9 155 U1 2 U2 15 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 11 PY 1996 VL 68 IS 11 BP 1576 EP 1578 DI 10.1063/1.116686 PG 3 WC Physics, Applied SC Physics GA TZ291 UT WOS:A1996TZ29100046 ER PT J AU Doschek, GA Feldman, U AF Doschek, GA Feldman, U TI The temperature of the bright knots at the tops of solar flare loops SO ASTROPHYSICAL JOURNAL LA English DT Article DE MHD; sun, flares; sun, UV radiation ID X-RAY TELESCOPE; PLASMA AB The Japanese Yohkoh spacecraft has revealed the pervasive presence of confined bright regions at the tops of solar flare magnetic flux tubes. The physical parameters in the bright regions, such as temperature and density, are of considerable interest for attempting to understand the nature and longevity of these regions. We have found an example of such a source in spectroheliograms of a flare observed by the Naval Research Laboratory slitless spectroheliograph on Skylab. This instrument offers better temperature discrimination than possible with a broadband X-ray telescope such as flown on Yohkoh. We determine the temperature of the Skylab source using the most recent atomic data. From the Skylab extreme-ultraviolet images of this flare in spectral lines of Fe XXII, Fe XXIII, and Fe XXIV, we find that the confined bright region can be described as an isothermal source at a temperature of about 11 x 10(6) K. However, this conclusion generally contradicts temperatures measured from uncollimated Bragg crystal spectrometer spectra from Yohkoh and other spacecraft for similar X-ray class flares. There is also emission at the same location from Ca XVII ions formed at about 6 x 10(6) K, implying that the source might be multithermal. A multithermal source would indicate that the bright regions are composed of structures below the spatial resolution of the Skylab and Yohkoh instrumentation and could possibly resolve the discrepancies between Bragg spectrometer and imaging data. RP Doschek, GA (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 22 TC 12 Z9 12 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 1996 VL 459 IS 2 BP 773 EP & DI 10.1086/176941 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TX195 UT WOS:A1996TX19500038 ER PT J AU Newton, EK Emslie, AG Mariska, JT AF Newton, EK Emslie, AG Mariska, JT TI Testing the impulsiveness of solar flare heating through analysis of dynamic atmospheric response SO ASTROPHYSICAL JOURNAL LA English DT Article DE acceleration of particles; sun, corona; sun, flares; sun, particle emission; sun, X-rays, gamma rays ID SOFT-X-RAY; CHROMOSPHERIC EVAPORATION; PHASE; DIAGNOSTICS; IONIZATION; ELECTRONS; SPECTRA; TARGET; LINE AB One crucial test of a solar flare energy transport model is its ability to reproduce the characteristics of the atmospheric motions inferred from soft X-ray line spectra. Using a recently developed diagnostic, the velocity differential emission measure (VDEM), we can obtain from observations a physical measure of the amount of soft X-ray-emitting plasma flowing at each velocity, upsilon, and hence the total momentum of the upflowing plasma, without approximation or parametric fitting. We have correlated solar hard X-ray emission profiles by the Yohkoh Hard X-ray telescope with the mass and momentum histories inferred from soft X-ray line profiles observed by the Yohkoh Bragg crystal spectrometers. For suitably impulsive hard X-ray emission, an analysis of the hydrodynamic equations predicts a proportionality between the hard X-ray intensity and the second time derivative of the soft X-ray-emitting plasma's momentum. This relationship is borne out by an analysis of 18 disk-center impulsive flares of varying durations, thereby lending support to the hypothesis that a prompt energy deposition mechanism, such as an energetic electron flux, is indeed responsible for the soft X-ray response observed in the rise phase of sufficiently impulsive solar flares. C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RP Newton, EK (reprint author), UNIV ALABAMA,DEPT PHYS,HUNTSVILLE,AL 35899, USA. NR 43 TC 8 Z9 8 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 1996 VL 459 IS 2 BP 804 EP 814 DI 10.1086/176944 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TX195 UT WOS:A1996TX19500041 ER PT J AU Mariska, JT Sakao, T Bentley, RD AF Mariska, JT Sakao, T Bentley, RD TI Hard and soft X-ray observations of solar limb flares SO ASTROPHYSICAL JOURNAL LA English DT Article DE sun, flares; sun, X-rays, gamma rays ID BRAGG CRYSTAL SPECTROMETER; DIELECTRONIC SATELLITE SPECTRA; HELIUM-LIKE IONS; A MISSION; TELESCOPE; PLASMA; BURST AB Using observations from the Yohkoh Bragg Crystal Spectrometer, hard X-ray telescope, and soft X-ray telescope, we have examined eight limb flares. Four of the flares have the footpoints occulted by the solar limb. We find that the occulted flares generally have softer hard X-ray spectra and smaller peak values of the nonthermal broadening velocity than nonocculted flares. All other physical parameters show no differences between occulted flares and nonocculted flares. The hard X-ray spectra support a model in which the footpoint emission is due to thick-target sources, while the looptop emission is due to thin-target sources. High spectral resolution hard X-ray observations should thus show a break in the hard X-ray spectrum of the looptop source. We can find no obvious explanation for the differences in nonthermal broadening velocity. C1 NATL ASTRON OBSERV, MITAKA, TOKYO 181, JAPAN. UCL, MULLARD SPACE SCI LAB, DORKING RH5 6NT, SURREY, ENGLAND. RP Mariska, JT (reprint author), USN, RES LAB, EO HULBURT CTR SPACE RES, CODE 7673, WASHINGTON, DC 20375 USA. NR 28 TC 26 Z9 26 U1 1 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 MAR 10 PY 1996 VL 459 IS 2 BP 815 EP 822 DI 10.1086/176945 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TX195 UT WOS:A1996TX19500042 ER PT J AU Doschek, GA Mariska, JT Sakao, T AF Doschek, GA Mariska, JT Sakao, T TI Soft X-ray flare dynamics SO ASTROPHYSICAL JOURNAL LA English DT Article DE line, profiles; sun, flares; sun, X-rays, gamma rays ID SOLAR-A MISSION; BRAGG CRYSTAL SPECTROMETER; IMPULSIVE PHASE; GASDYNAMICS; TELESCOPE; EMISSION; PLASMA; YOHKOH; LOOPS; LINE AB We discuss the dynamics of four soft X-ray flares as revealed by the X-ray resonance line profiles of the He-like ions, Fe XXV, Ca XIX, and S XV. The flares chosen for analysis belong to a subclass of events that have intense Doppler blueshifted spectral signatures during the rise phase. The spectra were obtained from the Bragg crystal spectrometer (BCS) experiment flown on the Japanese Yohkoh spacecraft. We deconvolve the line profiles into a flare decay phase component (stationary component) produced by nonmoving plasma with little or no turbulent motions, and a flare rise phase component (dynamic component) produced by bulk plasma motion and turbulence. The dynamic component is further deconvolved into a high-speed component (greater than 400 km s(-1)) and a lower speed, more turbulent component, We find that the dynamic and stationary components have approximately the same electron temperature. The dynamic and stationary component fluxes are compared with hard X-ray fluxes obtained from the hard X-ray telescope (HXT) on Yohkoh. We find that the onset time of the high-speed dynamic component corresponds closely to the onset of hard X-rays. We discuss the X-ray morphology of the flares as revealed by the soft X-ray telescope (SXT) and hard X-ray telescope (HXT) on Yohkoh. From analysis of the X-ray light curves of individual pixels in the SXT images, we believe we have been able to determine at least some of the locations of the dynamic component in the images. Although the observations support many aspects of chromospheric evaporation models, there are significant problems. No obvious rising fronts of plasma are observed for any of the flares. There are apparent footpoint hard X-ray sources that cannot be physically related in an obvious manner with the main sources of soft X-ray emission. The flares are complex, and therefore there are some ambiguities in interpretation of the morphology. C1 NATL ASTRON OBSERV JAPAN,SOLAR PHYS DIV,MITAKA,TOKYO 181,JAPAN. RP Doschek, GA (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 7670,WASHINGTON,DC 20375, USA. NR 28 TC 19 Z9 20 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 1996 VL 459 IS 2 BP 823 EP & DI 10.1086/176946 PN 1 PG 17 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TX195 UT WOS:A1996TX19500043 ER PT J AU Lellouch, E Strobel, DF Belton, MJS Summers, ME Paubert, G Moreno, R AF Lellouch, E Strobel, DF Belton, MJS Summers, ME Paubert, G Moreno, R TI Detection of sulfur monoxide in Io's atmosphere SO ASTROPHYSICAL JOURNAL LA English DT Article DE planets and satellites, individual (Io); radio lines, solar system ID SO2 ATMOSPHERE; METEOROLOGY; IONOSPHERE; SURFACE; MODEL AB Millimeter-wave observations of Io with the IRAM 30 m telescope have allowed the detection of two rotational lines of SO at 219.949 and 138.178 GHz in Io's atmosphere. The observations can be fitted by assuming that gaseous SO is collocated with SO2 on a restricted fraction of Io's surface. In this case, the SO/SO2 mixing ratio is 3%-10%, in agreement with predictions from one-dimensional photochemical models and suggesting a vertical eddy diffusion coefficient in the range 3 x 10(7) to 3 X 10(8) cm(2) s(-1). Alternatively, SO could constitute a tenuous, global atmosphere with column density in the range (2-6) x 10(14) cm(-2). Photochemistry in SO2 hydrostatic and/or volcanic plume atmospheres and horizontal transport can conceivably produce such an extended SO atmosphere. C1 JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. NATL OPT ASTRON OBSERV,TUCSON,AZ 85726. USN,RES LAB,WASHINGTON,DC 20375. IRAM,E-18012 GRANADA,SPAIN. RP Lellouch, E (reprint author), OBSERV MEUDON,F-9215 MEUDON,FRANCE. NR 21 TC 48 Z9 48 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 1996 VL 459 IS 2 BP L107 EP L110 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TX196 UT WOS:A1996TX19600016 ER PT J AU Du, L Lee, JS AF Du, L Lee, JS TI Fuzzy classification of earth terrain covers using complex polarimetric SAR data SO INTERNATIONAL JOURNAL OF REMOTE SENSING LA English DT Article ID IMAGING RADAR POLARIMETRY; IMAGES; SEGMENTATION AB The conventional approach of terrain image classification that assigns a specific class for each pixel is inadequate, because the area covered by each pixel may embrace more than a single class. Fuzzy set theory which has been developed to deal with imprecise information can be incorporate in the analysis for a more appropriate solution to this problem. In the current state of imaging radar technology, polarimetric synthetic aperture radar (SAR) is unique in providing complete polarization information of ground covers for more effective classification than a single polarization radar. In this paper, we use the fuzzy c-means clustering algorithm for unsupervised segmentation of multi-look polarimetric SAR images. A statistical distance measure adopted in this algorithm is derived from the complex Wishart distribution of the complex covariance matrix. In classifying polarimetric SAR imagery, each terrain class is characterized by its own feature covariance matrix. The algorithm searches for cluster centres for each class and generates a fuzzy partition for the whole image. Membership grades obtained for each pixel provide detailed information about spatial terrain variations. Classification of the image is achieved by choosing a defuzzification criterion. When the back-scattering characteristics of two or more classes are not well distinguished from each other, a divisive hierarchical clustering procedure is adopted to locate their respective feature covariance matrices. NASA/JPL AIRSAR data is used to substantiate this fuzzy classification algorithm. RP Du, L (reprint author), USN,RES LAB,REMOTE SENSING DIV,CODE 7263,WASHINGTON,DC 20375, USA. NR 12 TC 48 Z9 51 U1 1 U2 8 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0143-1161 J9 INT J REMOTE SENS JI Int. J. Remote Sens. PD MAR 10 PY 1996 VL 17 IS 4 BP 809 EP 826 PG 18 WC Remote Sensing; Imaging Science & Photographic Technology SC Remote Sensing; Imaging Science & Photographic Technology GA UC012 UT WOS:A1996UC01200013 ER PT J AU Brodine, SK Mascola, JR Garland, FC AF Brodine, SK Mascola, JR Garland, FC TI Risk of HIV transmission in infected US military personnel - Reply SO LANCET LA English DT Letter RP Brodine, SK (reprint author), USN,HLTH RES CTR,DEPT HLTH SCI & EPIDEMIOL,DIV CLIN EPIDEMIOL,CODE 232,SAN DIEGO,CA 92186, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LANCET LTD PI LONDON PA 42 BEDFORD SQUARE, LONDON, ENGLAND WC1B 3SL SN 0140-6736 J9 LANCET JI Lancet PD MAR 9 PY 1996 VL 347 IS 9002 BP 697 EP 697 PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA TZ285 UT WOS:A1996TZ28500072 ER PT J AU Dressick, WJ Kondracki, LM Chen, MS Brandow, SL Matijevic, E Calvert, JM AF Dressick, WJ Kondracki, LM Chen, MS Brandow, SL Matijevic, E Calvert, JM TI Characterization of a colloidal Pd(II)-based catalyst dispersion for electroless metal deposition SO COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS LA English DT Article DE colloids; dispersions; electroless plating; metallization; nickel deposition; palladium catalysts ID DEEP UV PHOTOCHEMISTRY; MONOLAYER FILMS; OHMIC CONTACTS; N-GAAS; LITHOGRAPHY; METALLIZATION; PALLADIUM; INP AB An aqueous Pd(II) dispersion, useful as a catalyst for the selective electroless deposition of nickel metal at ligand-bearing surfaces, is prepared by the hydrolysis of PdCl42- at pH 5 in an approximately 0.01 mol dm(-3) NaCl solution. The catalyst dispersion is characterized by W-visible absorption spectroscopy, electroless metallization, ultracentrifugation, and electrophoresis. The dispersion is found to consist of a distribution of anionic and uncharged Pd(II) species ranging in type from monomeric to colloidal. The species responsible for the initiation of electroless metal deposition at the ligand surface are identified as colloidal. Atomic force microscopy indicates that the colloidal catalysts are bound at the surface and range in diameter from approximately 4 to 53 nm with an average size of 30 +/- 12 nm. The behavior of the catalyst dispersion is consistent with a model in which colloid formation is initiated by polymerization of monomeric precursors generated by successive hydrolytic Cl- loss from PdCl42-, and deprotonation of the corresponding aquo-Pd(II) complex(es). C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. CLARKSON UNIV,CTR ADV MAT PROC,POTSDAM,NY 13699. RP Dressick, WJ (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,CODE 6900,WASHINGTON,DC 20375, USA. NR 37 TC 56 Z9 58 U1 1 U2 13 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-7757 J9 COLLOID SURFACE A JI Colloid Surf. A-Physicochem. Eng. Asp. PD MAR 8 PY 1996 VL 108 IS 1 BP 101 EP 111 DI 10.1016/0927-7757(95)03392-0 PG 11 WC Chemistry, Physical SC Chemistry GA TY852 UT WOS:A1996TY85200010 ER PT J AU Heath, ME Thomas, JR Shelton, J AF Heath, ME Thomas, JR Shelton, J TI Neuropeptide-Y increases blood flow through arteriovenous anastomoses in the rat tail. SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,MED RES INST,BETHESDA,MD 20889. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 935 EP 935 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28400937 ER PT J AU Kayar, SR Miller, TL Wolin, MJ Aukhert, Y Axley, MJ Kiesow, LA AF Kayar, SR Miller, TL Wolin, MJ Aukhert, Y Axley, MJ Kiesow, LA TI Biochemical elimination of H-2 dissolved in tissues of rats breathing hyperbaric H-2. SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,MED RES INST,BETHESDA,MD 20889. NEW YORK STATE DEPT HLTH,WADSWORTH CTR LABS & RES,ALBANY,NY 12201. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 2265 EP 2265 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28402265 ER PT J AU Kurlansik, L Heath, ME Ridgway, SH Carder, D AF Kurlansik, L Heath, ME Ridgway, SH Carder, D TI Plasma amino acid levels in bottlenose dolphin (Tursiops truncatus). SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,MED RES INST,BETHESDA,MD 20889. USN,COMMAND CONTROL OCEAN SURVEILLANCE CTR,SAN DIEGO,CA 92152. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 4255 EP 4255 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28404254 ER PT J AU Kang, YH Harlan, DM White, L Lee, CH AF Kang, YH Harlan, DM White, L Lee, CH TI Interleukin-13 exhibits proinflammatory and antiinflammatory activities in human umbilical vein endothelial cells. SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,MED RES INST,BETHESDA,MD 20889. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 4423 EP 4423 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28404421 ER PT J AU Subramanian, G Boyer, JH Trudell, ML Koppes, WM Sitzmann, ME Nock, LA Gilardi, R Russell, TP AF Subramanian, G Boyer, JH Trudell, ML Koppes, WM Sitzmann, ME Nock, LA Gilardi, R Russell, TP TI Reactions of benzotriazolo[2,1-a]benzotriazole derivatives .2. An unusual hydrolysis oxidation reaction SO JOURNAL OF ORGANIC CHEMISTRY LA English DT Article ID ACID C1 UNIV NEW ORLEANS,DEPT CHEM,NEW ORLEANS,LA 70148. USN,WARFARE CTR,INDIAN HEAD DIV,INDIAN HEAD,MD 20640. USN,RES LAB,WASHINGTON,DC 20375. NR 11 TC 8 Z9 8 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3263 J9 J ORG CHEM JI J. Org. Chem. PD MAR 8 PY 1996 VL 61 IS 5 BP 1898 EP 1900 DI 10.1021/jo951889i PG 3 WC Chemistry, Organic SC Chemistry GA TZ997 UT WOS:A1996TZ99700059 ER PT J AU Weir, AF Lowrey, AH Williams, RW AF Weir, AF Lowrey, AH Williams, RW TI Transferable quantum mechanical scale factors for alanine SO THEOCHEM-JOURNAL OF MOLECULAR STRUCTURE LA English DT Article DE ab initio calculation; alanine; scale factor ID ABINITIO FORCE-CONSTANTS; ALA-X PEPTIDES; VIBRATIONAL ANALYSIS; POLYPEPTIDES; FREQUENCIES; HYDRATION; PROTEINS; SPECTRA AB We have obtained ab initio scale factors for alanine . 1H(2)O supermolecules in acidic and basic solutions using the 4-31G, 4-31G*, 6-31G**, and 6-31+G** basis sets. After full optimization of each supermolecule, but prior to transformation of its Cartesian coordinates and force constants to internal coordinate representations, we have deleted the Cartesian coordinates and force constants for each water molecule, leaving only the coordinates and force constants for alanine. This preserves the effect of water on the electronic structure of alanine while avoiding artifacts in normal mode calculations due to vibrational coupling with statically bound water. All but two of the 4-31G scale factors show transferability from smaller molecules. Most scale factors are also transferable between pH 1 and pH 13 for the coordinates unchanged by protonation. Force constants are scaled using the experimentally determined Raman and FTIR vibrational frequencies of eight isotopic species of alaninate in water at pH 13 and seven isotopic species of alanine at pH 1. Good agreement is obtained between the calculated and experimental frequencies for the isotopic species for all basis sets and structures. A Fermi resonance analysis of the Raman spectrum of alaninate in the region from 500 to 900 cm(-1) suggests an explanation for an unassigned band at 590 cm(-1) in the unsubstituted molecule. C1 UNIFORMED SERV UNIV HLTH SCI,DEPT BIOCHEM,BETHESDA,MD 20814. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. NR 22 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-1280 J9 THEOCHEM-J MOL STRUC JI Theochem-J. Mol. Struct. PD MAR 8 PY 1996 VL 362 IS 3 BP 339 EP 354 PG 16 WC Chemistry, Physical SC Chemistry GA UB259 UT WOS:A1996UB25900009 ER PT J AU Collins, N FlippenAnderson, JL Haaseth, RC Deschamps, JR George, C Kover, R Hruby, VJ AF Collins, N FlippenAnderson, JL Haaseth, RC Deschamps, JR George, C Kover, R Hruby, VJ TI Conformational determinants of agonist versus antagonist properties of [D-Pen(2),D-Pen(5)]enkephalin (DPDPE) analogs at opioid receptors. Comparison of x-ray crystallographic structure, solution H-1 NMR data, and molecular dynamic simulations of [L-Ala(3)]DPDPE and [D-Ala(3)]DPDPE SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID BIS-PENICILLAMINE ENKEPHALIN; DELTA-RECEPTOR; COUPLING-CONSTANTS; PEPTIDE ENKEPHALIN; ENERGY MINIMIZATION; COHERENCE TRANSFER; DISULFIDE BOND; ROTATING-FRAME; SPECTROSCOPY; MORPHINE AB c-[D-Pen(2),D-Pen(5)]enkephalin (DPDPE, 1) is a cyclic, constrained, highly potent, delta opioid receptor selective peptide agonist. Substitution of Gly(3) with L-Ala in DPDPE to give [L-Ala(3)]DPDPE (2) has been shown to produce a peptide with much greater delta receptor binding selectivity than DPDPE itself. However [L-Ala(3)]DPDPE is only a partial agonist in in vivo antinociception and actually was found to potently antagonize the antinociceptive effects of DPDPE at delta receptors in the brain. In comparison, [D-Ala(3)]DPDPE (3) is a weak and poorly selective delta agonist. In an effort to correlate the biological profiles of these peptides with secondary structure, [L-Ala(3)]DPDPE and [D-Ala(3)]DPDPE were studied by X-ray crystallography and H-1 and C-13 NMR in DMSO solution. Crystals of both peptides were obtained using vapor diffusion techniques. [L-Ala(3)]DPDPE crystallizes in the monoclinic space group C2 with cell dimensions a = 36.35(1) Angstrom, b = 19.737(4) Angstrom, c = 28.16(1) Angstrom, beta = 129.07(2)degrees, and V = 15688(9) Angstrom(3). The asymmetric unit contains four peptide molecules and approximately 20 water molecules, giving a calculated density of 1.274 g cm(-3). The conformation of all four independent [L-Ala(3)]DPDPE molecules is essentially the same. [D-Ala(3)]DPDPE crystallizes in the monoclinic space group P2(1) with cell dimensions a = 12.271(2) Angstrom, b = 9.600(a) Angstrom, c = 18.750(4) Angstrom, beta = 103.56(2)degrees, and V = 2147.2(7) Angstrom(3). The asymmetric unit contains one peptide molecule and 10 molecules of water, giving a calculated density of 1.298 g cm(-3). Comparison of these X-ray structures with the crystal structure previously reported for DPDPE indicates that there are differences in the disulfide bond region for all three peptides. ROEs determined about the disulfide regions of 1-3 in solution are indicative of a high degree of conformational interconversion, while heteronuclear coupling constants between the D-Pen(2.5) Ha and C gamma,gamma' carbons indicate a Strong preference for a gauche (+) chi(1) angle in 2. The backbone conformations of DPDPE and [D-Ala(3)]DPDPE in the X-ray structures are virtually identical, while in [L-Ala(3)]DPDPE, there is a rotation of approximately 160 degrees about both psi(2) and phi(3) compared to DPDPE which has the effect of rotating this amide group approximately 180 degrees relative to DPDPE. The solution NMR data for the peptide backbone conformations of 2 and 3 are mainly consistent with their X-ray structures. However, MD simulation of all three compounds, starting with the geometries of their X-ray structures, indicates that by comparison of observed and predicted ROE intensities an equilibrium between these conformations is likely in solution. The ''DPDPE-like'' conformation for [L-Ala(3)]DPDPE is however significantly higher in energy than the X-ray structure reported here and, thus, is predicted to be less populated in solution and in receptor binding. It is concluded that the X-ray structure of DPDPE represents an agonist conformation for this peptide at the delta opioid receptor and that the corresponding X-ray structure of [L-Ala(3)]DPDPE represents an antagonist conformation due to the differences in conformation between positions 2 and 3. Considerations on the structural implications of this conformational difference on receptor binding are discussed. C1 UNIV ARIZONA,DEPT CHEM,TUCSON,AZ 85712. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. RI Kover, Katalin/A-7054-2008 NR 56 TC 34 Z9 34 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAR 6 PY 1996 VL 118 IS 9 BP 2143 EP 2152 DI 10.1021/ja9531081 PG 10 WC Chemistry, Multidisciplinary SC Chemistry GA TY698 UT WOS:A1996TY69800004 ER PT J AU Dhote, AM Madhukar, S Wei, W Venkatesan, T Ramesh, R Cotell, CM AF Dhote, AM Madhukar, S Wei, W Venkatesan, T Ramesh, R Cotell, CM TI Direct integration of ferroelectric La-Sr-Co-O/Pb-Nb-Zr-Ti-O/La-Sr-Co-O capacitors on silicon with conducting barrier layers SO APPLIED PHYSICS LETTERS LA English DT Article ID THIN-FILMS; FABRICATION; ELECTRODES; MEMORIES AB The growth of a polycrystalline La-Sr-Co-O/Pb-Nb-Zr-Ti-O/La-Sr-Co-O ferroelectric capacitor heterostructure is demonstrated on platinized conducting barrier layers of TiN/poly-Si/Si substrate for integration into high density nonvolatile memory (HDNVM). The concept of conducting bottom layers allows the realization of three-dimensional stacked capacitor-transistor geometry with a direct contact to the memory capacitor, occupying significantly less area on the chip required for HDNVM application. The growth of the ferroelectric heterostructure is achieved at a low temperature of 500-550 degrees C, compatible with existing Si based technology without losing the structural and phase integrity of the ferroelectric stack and conducting bottom layers. The fatigue-free characteristics up to 10(11) cycles at room temperature and 100 degrees C, imprint test and good retaining capability evaluated on these capacitors prove their suitability for HDNVM devices. (C) 1996 American Institute of Physics. C1 USN,RES LAB,SURFACE MODIFICAT LAB,WASHINGTON,DC 20375. RP Dhote, AM (reprint author), UNIV MARYLAND,DEPT MAT & NUCL ENGN,COLLEGE PK,MD 20742, USA. RI Venkatesan, Thirumalai/E-1667-2013 NR 18 TC 29 Z9 31 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 4 PY 1996 VL 68 IS 10 BP 1350 EP 1352 DI 10.1063/1.115931 PG 3 WC Physics, Applied SC Physics GA TX861 UT WOS:A1996TX86100014 ER PT J AU Saks, NS Groeseneken, G DeWolf, I AF Saks, NS Groeseneken, G DeWolf, I TI Characterization of individual interface traps with charge pumping SO APPLIED PHYSICS LETTERS LA English DT Article ID DEFECTS AB Charge pumping (CP) of individual interface traps has been studied in small field effect transistors. The amplitude of the CP current is found to be quantized in units of qf, where f is the frequency of the applied CP wave form, and each unit represents the response of a single trap. The time dependence for emission of a trapped electron from a single interface trap has also been measured with CP. The emission probability is found to increase exponentially with time, consistent with Shockley-Read-Hall statistics. We also compare the relative merits of random telegraph noise experiments and CP for characterizing individual interface traps. (C) 1996 American Institute of Physics. C1 IMEC,B-3001 LOUVAIN,BELGIUM. RP Saks, NS (reprint author), USN,RES LAB,CODE 6813,WASHINGTON,DC 20375, USA. NR 9 TC 25 Z9 25 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 4 PY 1996 VL 68 IS 10 BP 1383 EP 1385 DI 10.1063/1.116087 PG 3 WC Physics, Applied SC Physics GA TX861 UT WOS:A1996TX86100025 ER PT J AU Eddy, CR Tonucci, RJ Pearson, DH AF Eddy, CR Tonucci, RJ Pearson, DH TI Deep submicron pattern transfer using high density plasma etching and nanochannel glass replica technology SO APPLIED PHYSICS LETTERS LA English DT Article ID MERCURY CADMIUM TELLURIDE; LITHOGRAPHY; FABRICATION AB Nanochannel glass (NCG)-based lithography has been used in conjunction with electron cyclotron resonance microwave plasma reactive ion etching (ECR-RIE) to demonstrate deep submicron features in HgCdTe alloys and InAs/GaSb heterostructures. NCG-based lithography is attractive as a massively parallel, low cost technology for nanometer-scale patterning. Samples patterned using thin-film metal replicas of NCG and methyl-radical-based ECR-RIE demonstrate a high degree of uniformity and fidelity with individual features having nearly vertical sidewalls and aspect ratios of up to 2 to 1. Dot arrays with features as small as 250 nm (and with packing densities of similar to 10(10)/cm(2)) and anti-dot arrays with features as small as 600 nm have been realized. RP Eddy, CR (reprint author), USN,RES LAB,CODE 6671,WASHINGTON,DC 20375, USA. NR 12 TC 6 Z9 6 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 4 PY 1996 VL 68 IS 10 BP 1397 EP 1399 DI 10.1063/1.116092 PG 3 WC Physics, Applied SC Physics GA TX861 UT WOS:A1996TX86100030 ER PT J AU Henderson, DR AF Henderson, DR TI The sneak-attack tax on seniors SO FORTUNE LA English DT Editorial Material C1 USN,POSTGRAD SCH,MONTEREY,CA 93940. RP Henderson, DR (reprint author), HOOVER INST,WASHINGTON,DC, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU TIME INC PI NEW YORK PA TIME & LIFE BUILDING ROCKEFELLER CENTER, NEW YORK, NY 10020-1393 SN 0015-8259 J9 FORTUNE JI Fortune PD MAR 4 PY 1996 VL 133 IS 4 BP 60 EP 60 PG 1 WC Business SC Business & Economics GA TV460 UT WOS:A1996TV46000017 ER PT J AU Taylor, RJ Dahlburg, JP Iwase, A Gardner, JH Fyfe, DE Willi, O AF Taylor, RJ Dahlburg, JP Iwase, A Gardner, JH Fyfe, DE Willi, O TI Measurement and simulation of laser imprinting and consequent Rayleigh-Taylor growth SO PHYSICAL REVIEW LETTERS LA English DT Article ID TARGETS; RESOLUTION; ABLATION; LIGHT AB High-resolution, high-contrast images have been obtained of the imprint of laser nonuniformity and subsequent Rayleigh-Taylor (RT) growth in planar foils driven by coherent and temporally incoherent light. The experimental results are well reproduced by three-dimensional radiation transport hydrodynamics simulations. The role of hydrodynamic motion within the target from early time is highlighted, and a period of RT growth during which longer modes dominate is isolated. C1 USN,RES LAB,LCP&FD,WASHINGTON,DC 20375. RP Taylor, RJ (reprint author), UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,LONDON SW7 2BZ,ENGLAND. NR 17 TC 61 Z9 61 U1 1 U2 3 PU AMERICAN 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 MAR 4 PY 1996 VL 76 IS 10 BP 1643 EP 1646 DI 10.1103/PhysRevLett.76.1643 PG 4 WC Physics, Multidisciplinary SC Physics GA TX696 UT WOS:A1996TX69600022 ER PT J AU Son, DY Bucca, D Keller, TM AF Son, DY Bucca, D Keller, TM TI Hydrosilylation reactions of bis(dimethylsilyl)acetylenes: A potential route to novel sigma- and pi-conjugated polymers SO TETRAHEDRON LETTERS LA English DT Article ID POLY<(SILYLENE)DIACETYLENES>; DEHYDROCONDENSATION; TRIALKYLSILANES; ACETYLENES AB Chloroplatinic acid catalyzes hydrosilylation reactions between bis(dimethylsilyl)acetylenes and simple aromatic monoethynyl compounds, yielding styrenic derivatives. Reactions of the bis(dimethylsilyl)acetylenes with aromatic diethynyl compounds yield conjugated short chain oligomers. C1 USN,RES LAB,MAT CHEM BRANCH,WASHINGTON,DC 20375. NR 15 TC 20 Z9 21 U1 1 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0040-4039 J9 TETRAHEDRON LETT JI Tetrahedron Lett. PD MAR 4 PY 1996 VL 37 IS 10 BP 1579 EP 1582 DI 10.1016/0040-4039(96)00095-0 PG 4 WC Chemistry, Organic SC Chemistry GA TY294 UT WOS:A1996TY29400016 ER PT J AU Gillespie, DT AF Gillespie, DT TI The mathematics of Brownian motion and Johnson noise SO AMERICAN JOURNAL OF PHYSICS LA English DT Article AB One reason why Brownian motion and Johnson noise are difficult subjects to teach is that their mathematical requirements transcend the capabilities of ordinary differential calculus. Presented here is an exposition of the needed generalization of calculus, namely continuous Markov process theory, in a form that should be accessible to advanced physics undergraduates. It is shown how this mathematical framework enables one to give clear, concise derivations of all the principal results of Brownian motion and Johnson noise, including fluctuation-dissipation formulas, auto-covariance transport formulas, spectral density formulas, Nyquist's formula, the notions of white and 1/f(2) noise, and an accurate numerical simulation algorithm. An added benefit of this exposition is a clearer view of the mathematical connection between the two very different approaches to Brownian motion taken by Einstein and Langevin in their pioneering papers of 1905 and 1908. (C) 1996 American Association of Physics Teachers. RP USN, AIR WARFARE CTR, RES & TECHNOL DIV, CHINA LAKE, CA 93555 USA. NR 18 TC 122 Z9 123 U1 3 U2 35 PU AMER ASSOC PHYSICS TEACHERS PI COLLEGE PARK PA ONE PHYSICS ELLIPSE, COLLEGE PARK, MD 20740-3845 USA SN 0002-9505 EI 1943-2909 J9 AM J PHYS JI Am. J. Phys. PD MAR PY 1996 VL 64 IS 3 BP 225 EP 240 DI 10.1119/1.18210 PG 16 WC Education, Scientific Disciplines; Physics, Multidisciplinary SC Education & Educational Research; Physics GA TW978 UT WOS:A1996TW97800013 ER PT J AU Shin, AY Morin, WD Gorman, JD Jones, SB Lapinsky, AS AF Shin, AY Morin, WD Gorman, JD Jones, SB Lapinsky, AS TI The superiority of magnetic resonance imaging in differentiating the cause of hip pain in endurance athletes SO AMERICAN JOURNAL OF SPORTS MEDICINE LA English DT Article ID STRESS-FRACTURES; MRI AB The accuracy of magnetic resonance imaging of the hip was prospectively evaluated in 19 military subjects engaged in endurance training. These patients had hip pain, negative radiographs, and radionuclide bone scans consistent with femoral neck stress fracture. Twenty-two hips were identified as positive for femoral neck stress fracture by bone scan. Each patient underwent magnetic resonance imaging and 6-week follow-up plain radiographs of the hips. Magnetic resonance imaging studies differentiated femoral neck stress fractures from a synovial pit, iliopsoas muscle tear, iliopsoas tendinitis, obturator externus tendinitis, avascular necrosis of the femoral head, and a unicameral bone cyst. The follow-up radiographs were used to verify the diagnosis of stress fracture. The radiographs showed healing callus in patients with stress fractures. Patients with diagnoses other than stress fractures had no changes on follow-up radiographs. Magnetic resonance imaging studies were as sensitive and much more specific than bone scan in determining the cause of hip pain. Radionuclide bone scan had an accuracy of 68% for femoral neck stress fractures with 32% false-positive results; MRI was 100% accurate. Magnetic resonance imaging proved to be superior to radionuclide bone scanning in providing an early and accurate diagnostic tool that aided in the differential diagnosis of hip pain in the young endurance athlete. C1 USN,MED CTR,DEPT ORTHOPAED SURG,SAN DIEGO,CA 92134. USN,MED CTR,DEPT RADIOL,SAN DIEGO,CA 92134. MIDELFORT CLIN,ORTHOPAED SPORTS MED SERV,EAU CLAIRE,WI. USN HOSP,DEPT ORTHOPAED SURG,PORTSMOUTH,VA. RP Shin, AY (reprint author), USN,MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. OI Shin, Alexander/0000-0001-9658-8192 NR 13 TC 78 Z9 79 U1 0 U2 8 PU AMER ORTHOPAEDIC SOC SPORT MED PI WALTHAM PA 230 CALVARY STREET, WALTHAM, MA 02154 SN 0363-5465 J9 AM J SPORT MED JI Am. J. Sports Med. PD MAR-APR PY 1996 VL 24 IS 2 BP 168 EP 176 DI 10.1177/036354659602400209 PG 9 WC Orthopedics; Sport Sciences SC Orthopedics; Sport Sciences GA UA748 UT WOS:A1996UA74800009 PM 8775115 ER PT J AU Prados, E AF Prados, E TI Traditional fishing craft of the Tihamah and southwestern Arabian coast SO AMERICAN NEPTUNE LA English DT Article RP Prados, E (reprint author), USN,MEM FDN,WASHINGTON,DC 20350, USA. NR 39 TC 2 Z9 2 U1 0 U2 0 PU PEABODY MUSEUM PI SALEM PA E INDIA MARINE HALL, SALEM, MA 01970 SN 0003-0155 J9 AM NEPTUNE JI Am. Neptune PD SPR PY 1996 VL 56 IS 2 BP 89 EP 115 PG 27 WC History SC History GA VN218 UT WOS:A1996VN21800002 ER PT J AU Putnam, AA AF Putnam, AA TI The introduction of the revolving turret SO AMERICAN NEPTUNE LA English DT Article C1 USN,COMP AIDED DESIGN & MFG STRUCT STEEL PROJECT,WASHINGTON,DC 20350. RP Putnam, AA (reprint author), USN,DEEP SUBMERGENCE SYST PROGRAM,WASHINGTON,DC 20350, USA. NR 32 TC 0 Z9 0 U1 0 U2 0 PU PEABODY MUSEUM PI SALEM PA E INDIA MARINE HALL, SALEM, MA 01970 SN 0003-0155 J9 AM NEPTUNE JI Am. Neptune PD SPR PY 1996 VL 56 IS 2 BP 117 EP 129 PG 13 WC History SC History GA VN218 UT WOS:A1996VN21800003 ER PT J AU Wirtz, JJ AF Wirtz, JJ TI Intelligence intervention in the politics of democratic states: The United States, Israel, and Britain - BarJoseph,U SO AMERICAN POLITICAL SCIENCE REVIEW LA English DT Book Review RP Wirtz, JJ (reprint author), USN,POSTGRAD SCH,MONTEREY,CA, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER POLITICAL SCI ASSN PI WASHINGTON PA 1527 NEW HAMPSHIRE N W, WASHINGTON, DC 20036 SN 0003-0554 J9 AM POLIT SCI REV JI Am. Polit. Sci. Rev. PD MAR PY 1996 VL 90 IS 1 BP 230 EP 231 DI 10.2307/2082872 PG 2 WC Political Science SC Government & Law GA TX194 UT WOS:A1996TX19400081 ER PT J AU Sammons, MT Sexton, JL Meredith, JM AF Sammons, MT Sexton, JL Meredith, JM TI Basic science training in psychopharmacology - How much is enough? SO AMERICAN PSYCHOLOGIST LA English DT Article AB Training psychologists to administer psychotropic medication will require acquisition of a unique knowledge base and set of skills that are generally not components of graduate education in psychology. Nevertheless, the current level of basic science training in graduate education in psychology is substantial and should, with minor modification, allow adequate preparation for students to enter into specialized training to prescribe. The direct provision of psychopharmacology requires psychologists to demonstrate competencies in addition to those required in the general provision of psychological services. Such competencies are perhaps best taught at the postdoctoral level. The authors argue that all curricula training professional psychologists should be able to train psychologists capable of practicing as independent, full-fledged health care providers. C1 NATL NAVAL MED CTR, MED CTR, BETHESDA, MD 20889 USA. USN, PORTSMOUTH, VA USA. MALCOLM GROW MED CTR, CAMP SPRINGS, MD USA. NR 16 TC 12 Z9 12 U1 1 U2 1 PU AMER PSYCHOLOGICAL ASSOC PI WASHINGTON PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 SN 0003-066X J9 AM PSYCHOL JI Am. Psychol. PD MAR PY 1996 VL 51 IS 3 BP 230 EP 234 PG 5 WC Psychology, Multidisciplinary SC Psychology GA UB198 UT WOS:A1996UB19800009 PM 8881532 ER PT J AU Mauro, JM Cao, LK Kondracki, LM Walz, SE Campbell, JR AF Mauro, JM Cao, LK Kondracki, LM Walz, SE Campbell, JR TI Fiber-optic fluorometric sensing of polymerase chain reaction-amplified DNA using an immobilized DNA capture protein SO ANALYTICAL BIOCHEMISTRY LA English DT Article ID EVANESCENT-WAVE; COLORIMETRIC DETECTION; BINDING DOMAIN; RNA-POLYMERASE; GCN4; GENES; IMMUNOASSAY; EXPRESSION; BIOSENSOR; SEQUENCES AB A fiber-optic assay for amplified DNA products has been developed. Modifications of the DNA capture strategy described previously by Kemp et al. [Proc. Natl. Acad. Sci. USA 86, 2423-2427 (1989)] were made that allowed selective binding of DNA labeled during the amplification process to the sensing surface of fused silica fibers. The gene for a chimeric protein composed of the IgG-binding beta 2 subdomain of streptococcal protein G fused with the DNA binding domain of yeast GCN4 was constructed, and this PG/GCN4 protein was overexpressed in Escherichia coli. The purified protein was noncovalently bound to IgG-modified fibers utilizing strong and specific interactions between the protein G beta 2 domain and goat IgG that had been covalently immobilized on the fiber surface. Nanomolar concentrations of amplified DNA labeled with the fluorophore tetramethylrhodamine and the AP-1 consensus nucleotide sequence recognized by GCN4 (5'-ATGACTCAT) were rapidly and selectively bound within the evanescent zone of multimode laser-illuminated fibers. Signal from unincorporated fluorescent PCR primer was negligible, Individual fibers could be used for multiple sequential assays, since the fluorescent double-stranded DNA was rapidly and completely stripped from their surfaces with high salt solutions, leaving the IgG-PG/GCN4 DNA binding complex intact to accept another PCR sample. (C) 1996 Academic Press, Inc. C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. RP Mauro, JM (reprint author), GEOCENTERS INC,10903 INDIAN HEAD HIGHWAY,FT WASHINGTON,MD 20744, USA. NR 41 TC 19 Z9 20 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0003-2697 J9 ANAL BIOCHEM JI Anal. Biochem. PD MAR 1 PY 1996 VL 235 IS 1 BP 61 EP 72 DI 10.1006/abio.1996.0092 PG 12 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA TY712 UT WOS:A1996TY71200009 PM 8850548 ER PT J AU Palombaro, JF Klingelberger, CE AF Palombaro, JF Klingelberger, CE TI Angioedema associated with droperidol administration SO ANNALS OF EMERGENCY MEDICINE LA English DT Article ID MANAGEMENT; EDEMA AB Angioedema, also known as angioneurotic edema or Quincke's disease, is a well- demarcated, localized edema involving the subcutaneous tissues that may cause upper-airway obstruction. We report the case of a previously healthy 19-year-old man with no known drug allergies in whom angioedema with significant tongue swelling and protrusion developed within 10 minutes of the administration of a single IV dose of droperidol. RP Palombaro, JF (reprint author), USN,MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. NR 7 TC 9 Z9 9 U1 0 U2 0 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0196-0644 J9 ANN EMERG MED JI Ann. Emerg. Med. PD MAR PY 1996 VL 27 IS 3 BP 379 EP 381 DI 10.1016/S0196-0644(96)70276-7 PG 3 WC Emergency Medicine SC Emergency Medicine GA TZ597 UT WOS:A1996TZ59700021 PM 8599504 ER PT J AU Kinman, TD Pier, JR Suntzeff, NB Harmer, DL Valdes, F Hanson, RB Klemola, AR Kraft, RP AF Kinman, TD Pier, JR Suntzeff, NB Harmer, DL Valdes, F Hanson, RB Klemola, AR Kraft, RP TI A preliminary discussion of the kinematics of BHB and RR Lyrae stars near the north galactic pole SO ASTRONOMICAL JOURNAL LA English DT Article ID AB-STARS; HALO; FIELD AB The radial velocity dispersion of 67 RR Lyrae and BHB stars that are more than 4 kpc above the galactic plane at the North Galactic Pole is approximate to 110 km s(-1) and shows no trend with Z (the height above the galactic plane). Nine stars with Z less than or equal to 4 kpc show a smaller velocity dispersion (40+/-9 km s(-1)) as is to be expected if they mostly belong to a population with a flatter distribution. Both RR Lyrae stars and BHB stars show evidence of stream motion; the most significant is in fields RR 2 and RR 3, where 24 stars in the range 4.0 less than or equal to Z less than or equal to 11.0 kpc have a mean radial velocity of -59+/-16 km s(-1). Three halo stars in field RR 2 appear to be part of a moving group with a common radial velocity of -90 km s(-1). The streaming phenomenon therefore occurs over a range of spatial scales. The BHB and RR Lyrae stars in our sample both have a similar range of metallicity (-1.2 less than or equal to[Fe/H]less than or equal to-2.2). Proper motions of BHB stars in fields SA 57 (NGP) and the anticenter field (RR 7) (both of which lie close to the meridional plane of the Galaxy) show that the stars that have Z<4 kpc as well as those with Z>4 kpc have a Galactic V motion that is <-200 km/s and which is characteristic of the halo. Thus the stars that have a flatter distribution are really halo stars and not members of the metal-weak thick disk. (C) 1996 American Astronomical Society. C1 USN OBSERV,FLAGSTAFF STN,FLAGSTAFF,AZ 86002. CERRO TOLOLO INTERAMER OBSERV,NATL OPT ASTRON OBSERV,LA SERENA,CHILE. UNIV CALIF SANTA CRUZ,UNIV CALIF OBSERV,LICK OBSERV,BOARD STUDIES ASTRON & ASTROPHYS,SANTA CRUZ,CA 95064. RP Kinman, TD (reprint author), KITT PEAK NATL OBSERV,NATL OPT ASTRON OBSERV,POB 26732,TUCSON,AZ 85726, USA. NR 33 TC 20 Z9 20 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 1996 VL 111 IS 3 BP 1164 EP 1168 DI 10.1086/117861 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TX879 UT WOS:A1996TX87900016 ER PT J AU VanDyk, SD Weiler, KW Sramek, RA Schlegel, EM Filippenko, AV Panagia, N Leibundgut, B AF VanDyk, SD Weiler, KW Sramek, RA Schlegel, EM Filippenko, AV Panagia, N Leibundgut, B TI Type ''IIn'' supernovae: A search for radio emission SO ASTRONOMICAL JOURNAL LA English DT Article ID LIGHT CURVES; NOVA 1979C; SN-1980K; SPECTRA; SUPERWIND; NGC-3169 AB We have conducted a search using the Very Large Array for radio emission from members of Schlegel's (1990) proposed supernova subclass, Type IIn, which show optical characteristics indicative of shock interaction with dense circumstellar matter. None has been detected to upper limits of less than or similar to 0.2 mJy. We compare the corresponding radio luminosity upper limits for these supernovae to the radio luminosities for known Type II radio supernovae. Although broadly similar optically to the unusual Type IIn SNs 1988Z and 1986J, none of the observed supernovae could be nearly as radio luminous. We find that the radio behavior of most Type IIn supernovae may not be significantly different from that of other more normal Type II supernovae. It therefore appears that optical spectra alone are not sufficient to predict radio luminosity and that intrinsically radio luminous supernovae, such as SNs 1988Z and 1986J, are quite rare. (C) 1996 American Astronomical Society. C1 USN,RES LAB,REMOTE SENSING DIV,WASHINGTON,DC 20375. NATL RADIO ASTRON OBSERV,SOCORRO,NM 87801. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. EUROPEAN SO OBSERV,D-85748 GARCHING,GERMANY. UNIV CALIF BERKELEY,CTR PARTICLE ASTROPHYS,BERKELEY,CA. EUROPEAN SPACE AGCY,DEPT SPACE SCI,DIV ASTROPHYS,F-75738 PARIS,FRANCE. RP VanDyk, SD (reprint author), UNIV CALIF BERKELEY,DEPT ASTRON,601 CAMPBELL HALL,BERKELEY,CA 94720, USA. NR 59 TC 23 Z9 23 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 1996 VL 111 IS 3 BP 1271 EP 1277 DI 10.1086/117872 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TX879 UT WOS:A1996TX87900027 ER PT J AU Broome, JR Dick, EJ AF Broome, JR Dick, EJ TI Neurological decompression illness in swine SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID AIR-EMBOLISM; LIDOCAINE; PIGS AB Background: A porcine model of neurological decompression illness (DCI) and its treatment is described. Methods: Pigs (wt. 16-22 kg) underwent a simulated dive to 200 feet of seawater (fsw) (612.6 kPa) for 24 min, then decompressed at 60 fsw/min(-1) (183 kPa . min(-1)). Pigs that developed neurological DCI were sedated with diazepam, then treated by recompression on U.S. Navy Treatment Table 6. Functional outcome was assessed by treadmill running. At necropsy 24 h postdive, carcass density was measured by underwater weighing, and tissue samples including heart, spinal cord, and brain were taken for histopathological examination. Results: Neurological DCI occurred in 73% of control animals and developed within 2-7 min in 50% of cases. Affected pigs had significantly earlier onset of skin DCI than unaffected pigs (means: 9.52 min vs. 17.9 min, p < 0.001). Only 16.4% of pigs made a full functional recovery after recompression treatment. Outcome at 24 h was not improved in 20 pigs randomized to receive adjunctive lidocaine infusion compared to 20 pigs that received saline alone. Following necropsy, 77% of cases had petechial hemorrhages grossly visible in the spinal cord. Multifocal, microscopic hemorrhages, predominantly of spinal cord white matter, were found in 86.6% of DQ cases. Neither weight, density, nor genetic predisposition were found to influence DCI risk. Conclusions: The model is analogous to severe, early-onset, neurological DCI in humans and allows prospective evaluation of risk reduction and treatment stratagems for this form of DCI. Many applied and basic science issues relevant to diving medicine may also be studied using the model, and adaptation to study hypobaric DCI and other clinical applications of hyperbaric oxygen is feasible. RP Broome, JR (reprint author), USN,MED RES INST,DIVING & ENVIRONM PHYSIOL DEPT,BETHESDA,MD 20889, USA. NR 27 TC 31 Z9 31 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD MAR PY 1996 VL 67 IS 3 BP 207 EP 213 PG 7 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TY364 UT WOS:A1996TY36400002 PM 8775397 ER PT J AU Farrow, S Mahayni, A Banta, G Sowers, J Lockette, W AF Farrow, S Mahayni, A Banta, G Sowers, J Lockette, W TI Metoclopramide does not inhibit atrial natriuretic factor-stimulated diuresis in man SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID DOPAMINERGIC MODULATION; ALDOSTERONE SECRETION; 18-HYDROXYCORTICOSTERONE; HUMANS; ACTH AB Background: An understanding of the reflex hormonal responses that occur with a redistribution of the blood volume upon exposure to microgravity or during water immersion is operationally relevant. Further, dopamine receptor antagonists, which are used in the treatment of the motion sickness induced by microgravity, or at sea, may affect fluid metabolism. Atrial natriuretic factor (ANF) is a potent diuretic and natriuretic hormone that is released following central blood volume expansion in man. ANF is also a potent inhibitor of angiotensin- and potassium-stimulated aldosterone release. Hypothesis: Since ANF-induced diuresis may be mediated by dopamine, we sought to determine whether inhibition of dopamine receptors blocks ANF-induced natriuresis and diuresis. Also, since ANF has been shown to inhibit aldosterone secretion induced by adrenocorticotropic hormone (ACTH) in vitro, we investigated whether ANF decreases aldosterone in man infused with exogenous ACTH. Methods and Results: In six healthy, sodium-replete men, infusion of synthetic ANF (0.01 mu g . kg . min, Anaritide, Wyeth Laboratories) significantly increased urine flow from 7.1 +/- 0.7 to 11.7 +/- 1.8 ml . min(-1) (p < 0.05) and decreased aldosterone from 74.7 +/- 9.0 to 55.8 +/- 6.5 pg . ml(-1) (p = N.S.). Metoclopramide (Met), a dopaminergic antagonist, increased plasma aldosterone from 104.5 +/- 8.9 to 163 +/- 12.5 pg . ml(-1) (p < 0.05). ANF-induced diuresis was not inhibited by Met, but ANF significantly inhibited Met-stimulated increases in plasma aldosterone. ANF did not attenuate ACTH-stimulated increases in plasma aldosterone. Also, ANF-induced diuresis and natriuresis were not affected by concomitant infusions of ACTH, but the ANF-induced kaliuresis was significantly attenuated by ACTH. Conclusion: These studies suggest: a) Synthetic ANF induces a diuresis, natriuresis and kaliuresis; b) the D-2 receptor antagonist Met increases plasma aldosterone; c) ANF-induced diuresis is not subject to dopaminergic blockade with Met, but Met-induced increases in plasma aldosterone are inhibited by ANF; and d) ANF does not attenuate ACTH-stimulated increases in mineralocorticoid production. These studies have operational significance, as they demonstrate that D-2 dopaminergic blockade by the antinausea agent metoclopramide does not prevent the effects of increased ANF in response to central volume expansion such as occurs during exposure to microgravity or following water immersion. C1 UNIV MICHIGAN,SCH MED,ANN ARBOR,MI 48109. VET ADM MED CTR,ALLEN PK,MI 48101. USN,HLTH RES CTR,SAN DIEGO,CA 92152. RP Farrow, S (reprint author), WAYNE STATE UNIV,SCH MED,HLTH CTR 4H,DIV ENDOCRINOL,4201 ST ANTOINE,DETROIT,MI 48201, USA. NR 14 TC 2 Z9 2 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD MAR PY 1996 VL 67 IS 3 BP 248 EP 252 PG 5 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TY364 UT WOS:A1996TY36400008 PM 8775403 ER PT J AU Chu, E Allegra, CJ AF Chu, E Allegra, CJ TI The vole of thymidylate synthase as an RNA binding protein SO BIOESSAYS LA English DT Review ID 3' UNTRANSLATED REGION; MESSENGER-RNA; ESCHERICHIA-COLI; NUCLEOTIDE-SEQUENCE; MOUSE FIBROBLASTS; R17-COAT PROTEIN; COAT PROTEIN; POLY(A) TAIL; CELL-LINE; TRANSLATION AB Thymidylate synthase plays a central role in the biosynthesis of thymidylate, an essential precursor for DNA biosynthesis. in addition to its role in catalysis and cellular metabolism, it is now appreciated that thymidylate synthase functions as an RNA binding protein. Specifically, thymidylate synthase binds with high affinity to its own mRNA, resulting in translational repression. An extensive series of experiments has been performed to elucidate the molecular elements underlying the interaction between thymidylate synthase and its own mRNA. In addition to characterization of the underlying cis- and trans-acting elements, recent studies have shown that thymidylate synthase has the capacity to bind specifically to other cellular RNA species. While the biological significance of these other RNA/thymidylate synthase interactions remains to be defined, this work suggests a potential role for TS in coordinately regulating several critical aspects of cellular metabolism. RP Chu, E (reprint author), USN,NCI,MED ONCOL BRANCH,BETHESDA,MD 20889, USA. NR 65 TC 85 Z9 86 U1 1 U2 3 PU COMPANY OF BIOLOGISTS LTD PI CAMBRIDGE PA BIDDER BUILDING CAMBRIDGE COMMERCIAL PARK COWLEY RD, CAMBRIDGE, CAMBS, ENGLAND CB4 4DL SN 0265-9247 J9 BIOESSAYS JI Bioessays PD MAR PY 1996 VL 18 IS 3 BP 191 EP 198 DI 10.1002/bies.950180306 PG 8 WC Biochemistry & Molecular Biology; Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics GA UA994 UT WOS:A1996UA99400005 PM 8867733 ER PT J AU Tucker, BE Cottell, CM Auyeung, RCY Spector, M Nancollas, GH AF Tucker, BE Cottell, CM Auyeung, RCY Spector, M Nancollas, GH TI Pre-conditioning and dual constant composition dissolution kinetics of pulsed laser deposited hydroxyapatite thin films on silicon substrates SO BIOMATERIALS LA English DT Article DE hydroxyapatite; calcium phosphate; dissolution; prosthetics; pulsed laser deposition ID AMORPHOUS CALCIUM-PHOSPHATE; TITANIUM IMPLANTS; HYDROXYLAPATITE AB The kinetics of dissolution of pulsed laser deposited crystalline and amorphous thin films of hydroxyapatite on silicon substrates were measured at 37 degrees C and a pH value of 6.5 using the dual constant composition method. Solutions in which the pulsed laser deposited films were preconditioned (0.15 M NaCl) remained undersaturated or slightly supersaturated with respect to hydroxyapatite after equilibrium was reached, indicating only a very small coating release and the absence of re-precipitation on the surfaces. The amorphous films released more calcium and phosphate during pre-conditioning than the more crystalline films. Dual constant composition dissolution rates decreased as film crystallinity increased. The film with the lowest dissolution rate (approximately one sixth that of a crystalline film deposited using a hydroxyapatite powder target) was fabricated using a human tooth as the laser target. During pre-conditioning of plasma-sprayed coatings, more calcium and phosphate were released than for pulsed laser deposited films, and dual constant composition dissolution rates were much higher. C1 SUNY BUFFALO,DEPT CHEM,BUFFALO,NY 14260. SACHS FREEMAN ASSOCIATES INC,LANDOVER,MD 20785. BRIGHAM & WOMENS HOSP,BOSTON,MA 02115. SUNY BUFFALO,DEPT BIOMAT,BUFFALO,NY 14260. USN,RES LAB,SURFACE MODIFICAT BRANCH,WASHINGTON,DC 20375. FU NIAMS NIH HHS [AR40427]; NIDCR NIH HHS [DE03223] NR 17 TC 36 Z9 37 U1 1 U2 3 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0142-9612 J9 BIOMATERIALS JI Biomaterials PD MAR PY 1996 VL 17 IS 6 BP 631 EP 637 DI 10.1016/0142-9612(96)88714-X PG 7 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA UA342 UT WOS:A1996UA34200010 PM 8652782 ER PT J AU COLETTA, PE AF COLETTA, PE TI A SELECTIVELY ANNOTATED BIBLIOGRAPHY OF NAVAL POWER IN THE AMERICAN CIVIL-WAR SO CIVIL WAR HISTORY LA English DT Bibliography RP COLETTA, PE (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU KENT STATE UNIV PRESS PI KENT PA KENT, OH 44242 SN 0009-8078 J9 CIVIL WAR HIST JI Civil War Hist. PD MAR PY 1996 VL 42 IS 1 BP 32 EP 63 PG 32 WC History SC History GA UE712 UT WOS:A1996UE71200003 ER PT J AU Lewis, T AF Lewis, T TI The big software chill SO COMPUTER LA English DT Article RP Lewis, T (reprint author), USN, POSTGRAD SCH, CODE CS, MONTEREY, CA 93943 USA. 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 0018-9162 EI 1558-0814 J9 COMPUTER JI Computer PD MAR PY 1996 VL 29 IS 3 BP 12 EP 14 DI 10.1109/2.485889 PG 3 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA UA411 UT WOS:A1996UA41100003 ER PT J AU Dueck, GW Butler, JT AF Dueck, GW Butler, JT TI A heat quench algorithm for the minimization of multiple-valued programmable logic arrays SO COMPUTERS & ELECTRICAL ENGINEERING LA English DT Article DE multiple-valued logic; logic minimization; simulated annealing; heat quench; heuristic; sum-of-products; logic design AB Simulated annealing has been used extensively to solve combinatorial problems. Although it does not guarantee optimum results, results are often optimum or near optimum. The primary disadvantage is slow speed. It has been suggested [1] that quenching (rapid cooling) yields results that are far from optimum. We challenge this perception by showing a context in which quenching yields good solutions with good computation speeds. In this paper, we present an algorithm in which quenching is combined with rapid heating. We have successfully applied this algorithm to the multiple-valued logic minimization problem. Our results suggest that this algorithm holds promise for problems where moves exist that leave the cost of the current solution unchanged. C1 USN, POSTGRAD SCH, DEPT ELECT & COMP ENGN, MONTEREY, CA 93943 USA. RP Dueck, GW (reprint author), ST FRANCIS XAVIER UNIV, DEPT MATH & COMP SCI, ANTIGONISH, NS B2G 2W5, CANADA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0045-7906 J9 COMPUT ELECTR ENG JI Comput. Electr. Eng. PD MAR PY 1996 VL 22 IS 2 BP 103 EP 107 DI 10.1016/0045-7906(95)00036-4 PG 5 WC Computer Science, Hardware & Architecture; Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic SC Computer Science; Engineering GA UB356 UT WOS:A1996UB35600002 ER PT J AU Fryxell, D Oliveira, P Pascoal, A Silvestre, C Kaminer, I AF Fryxell, D Oliveira, P Pascoal, A Silvestre, C Kaminer, I TI Navigation, guidance and control of AUVs: An application to the MARIUS vehicle SO CONTROL ENGINEERING PRACTICE LA English DT Article; Proceedings Paper CT 3rd IFAC Workshop on Control Applications in Marine Systems (CAMS 95) CY MAY 10-12, 1995 CL TRONDHEIM, NORWAY SP IFAC Tech Comm Marine Syst DE autonomous vehicles; tracking systems; guidance; navigation; H-infinity control AB This paper addresses the problem of designing guidance, control and navigation systems for autonomous underwater vehicles (AUVs). Its contribution is twofold: i) it introduces a new methodology for the integrated design of guidance and control, and ii) it describes a novel approach to the analysis and design of multi-rate complementary filters for navigation. The methodologies proposed lead to an efficient procedure for the design of controllers for AUVs, to accurately track reference trajectories defined in an inertial reference frame. The paper illustrates the application of that procedure to the design of a tracking controller for the MARIUS AUV. The design phase is summarized, and the performance of the resulting controller is assessed in simulations, using dynamic models of the vehicle and its sensor suite. C1 Univ Tecn Lisboa, DEPT ELECT ENGN, INST SUPER TECN, P-1096 LISBON, PORTUGAL. USN, POSTGRAD SCH, DEPT AERONAUT & ASTRONAUT, MONTEREY, CA 93943 USA. RP Fryxell, D (reprint author), Univ Tecn Lisboa, INST SYST & ROBOT, INST SUPER TECN, AV ROVISCO PAIS, P-1096 LISBON, PORTUGAL. RI Silvestre, Carlos/F-9189-2010; Oliveira, Paulo/F-9196-2010; OI Silvestre, Carlos/0000-0002-5096-5527; Oliveira, Paulo/0000-0002-5799-390X; PASCOAL, ANTONIO /0000-0002-0657-6671 NR 12 TC 27 Z9 28 U1 1 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0967-0661 J9 CONTROL ENG PRACT JI Control Eng. Practice PD MAR PY 1996 VL 4 IS 3 BP 401 EP 409 DI 10.1016/0967-0661(96)00018-4 PG 9 WC Automation & Control Systems; Engineering, Electrical & Electronic SC Automation & Control Systems; Engineering GA TY846 UT WOS:A1996TY84600014 ER PT J AU Harford, RR Vidmar, DA Cobb, MW Miller, ML AF Harford, RR Vidmar, DA Cobb, MW Miller, ML TI An atypical piloleiomyoma presenting as a nonhealing ulcerated nodule SO CUTIS LA English DT Article AB Piloleiomyomas are benign smooth muscle tumors arising from the arrectores pilorum muscles in the skin. They vary in size and number, and are often spontaneously painful or sensitive to touch and cold. An unusual case of an ulcerated and painless piloleiomyoma is presented. RP Harford, RR (reprint author), USN,MED CTR,DEPT DERMATOL,BETHESDA,MD 20814, USA. NR 4 TC 5 Z9 5 U1 0 U2 0 PU EXCERPTA MEDICA INC PI NEW YORK PA 245 WEST 17TH STREET, NEW YORK, NY 10011 SN 0011-4162 J9 CUTIS JI Cutis PD MAR PY 1996 VL 57 IS 3 BP 168 EP 170 PG 3 WC Dermatology SC Dermatology GA UD281 UT WOS:A1996UD28100009 PM 8882014 ER PT J AU Bui, TX AF Bui, TX TI PRIISM SO DATA BASE FOR ADVANCES IN INFORMATION SYSTEMS LA English DT Editorial Material C1 USN,POSTGRAD SCH,DEPT SYST MANAGEMENT,MONTEREY,CA 93943. UNIV HAWAII MANOA,COLL BUSINESS ADM,DEPT DECIS SCI,HONOLULU,HI 96822. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSOC COMPUTING MACHINERY PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 J9 DATA BASE ADV INF SY JI Data Base Adv. Inf. Syst. PD SPR PY 1996 VL 27 IS 2 BP 12 EP 13 PG 2 WC Computer Science, Information Systems; Information Science & Library Science SC Computer Science; Information Science & Library Science GA WA227 UT WOS:A1996WA22700004 ER PT J AU Smart, TL Buss, AH Kropp, DH AF Smart, TL Buss, AH Kropp, DH TI Lot splitting in stochastic flow shop and job shop environments SO DECISION SCIENCES LA English DT Article AB In recent years many firms have been implementing small lot size production. Lot splitting breaks large orders into smaller transfer lots and offers the ability to move parts more quickly through the production process. This paper extends the deterministic studies by investigating various lot splitting policies in both stochastic job shop and stochastic flow shop settings using performance measures of mean flow time and the standard deviation of flow time. Using a computer simulation experiment, we found that in stochastic dynamic job shops, the number of lot splits is more important th, the exact form of splitting. However, when optimal job sizes are determined for each scenario, we found a few circumstances where the implementation of a small performance. Interestingly, the vast majority of previous research indicates that methods other than equal lot splitting typically improves makespan performance The earlier research, however, has been set in the static, deterministic flow shop environment Thus, our results are of practical interest since they show that the specific method of lot splitting is important in only a small set of realistic environments while the choice of an appropriate number of splits is typically more important. C1 USN,POSTGRAD SCH,DEPT OPERAT RES,MONTEREY,CA 93943. WASHINGTON UNIV,JOHN M OLIN SCH BUSINESS,ST LOUIS,MO 63130. RP Smart, TL (reprint author), WAKE FOREST UNIV,BABCOCK GRAD SCH MANAGEMENT,BOX 7659 REYNOLDA STN,WINSTON SALEM,NC 27109, USA. NR 19 TC 32 Z9 32 U1 0 U2 1 PU DECISION SCIENCES INST, GEORGIA STATE UNIV PI ATLANTA PA COLLEGE OF BUSINESS ADMN, UNIVERSITY PLAZA, ATLANTA, GA 30303 SN 0011-7315 J9 DECISION SCI JI Decis. Sci. PD SPR PY 1996 VL 27 IS 2 BP 215 EP 238 DI 10.1111/j.1540-5915.1996.tb01716.x PG 24 WC Management SC Business & Economics GA VE061 UT WOS:A1996VE06100003 ER PT J AU Munson, KD Hensien, MA Jacob, LN Robinson, AM Liston, WA AF Munson, KD Hensien, MA Jacob, LN Robinson, AM Liston, WA TI Diverticulitis - A comprehensive follow-up SO DISEASES OF THE COLON & RECTUM LA English DT Article ID DISEASE AB PURPOSE: This study was undertaken to examine the long-term results of medical and surgical management for diverticulitis. METHODS: A retrospective review of all patients admitted to Naval Medical Center Portsmouth, Virginia, between January 1991 and February 1994, was conducted. Of 78 patients included in the study, 65 were able to be contacted for follow-up. RESULTS: The surgically treated group consisted of 33 patients, and medically treated group had 32 patients. Of the medically treated group, 62.5 percent were found to have continuing symptoms. Medically treated patients with a long history and infrequent flares tended to be less symptomatic after hospitalization. Conversely, those medical patients with a short intense history were more likely to have symptoms. The frequency of symptoms in the surgical group was surprising, because 27.2 percent of this group reported continuing symptoms. CONCLUSIONS: Close follow-up of medically treated patients for objective evidence of diverticulitis is indicated. When surgical therapy is undertaken, patients should be counseled that symptoms may be largely unchanged following operation. RP Munson, KD (reprint author), USN,DEPT SURG,NAVAL MED CTR PORTSMOUTH,620 JOHN PAUL JONES CIRCLE,PORTSMOUTH,VA 23708, USA. NR 9 TC 82 Z9 86 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0012-3706 J9 DIS COLON RECTUM JI Dis. Colon Rectum PD MAR PY 1996 VL 39 IS 3 BP 318 EP 322 DI 10.1007/BF02049475 PG 5 WC Gastroenterology & Hepatology; Surgery SC Gastroenterology & Hepatology; Surgery GA UA269 UT WOS:A1996UA26900018 PM 8603555 ER PT J AU Schwerin, MJ Corcoran, KJ AF Schwerin, MJ Corcoran, KJ TI Beliefs about steroids: User vs non-user comparisons SO DRUG AND ALCOHOL DEPENDENCE LA English DT Article DE anabolic steroids; beliefs; expectancy; bodybuilder; drug-use ID ANABOLIC-STEROIDS AB The differences in beliefs about the effects of anabolic steroid (AS) use between AS users and non-users provides potentially important clues to understanding AS use. Two groups of bodybuilders were used in this comparison: AS users (n = 20) and non-users (n = 27). Subjects completed a 40-item scale measuring their beliefs about the effects of steroids, both physical and psychological (Beliefs About Steroids Scale: BASS). MANOVA comparisons between AS users and non-users on the BASS items indicate that AS-using bodybuilders believe that AS enhance their physical strength, athletic ability, confidence, assertiveness, feelings of sexuality, and feelings of optimism. C1 SO ILLINOIS UNIV,CARBONDALE,IL 62901. RP Schwerin, MJ (reprint author), USN,HLTH RES CTR,POB 85122,SAN DIEGO,CA 92186, USA. NR 13 TC 11 Z9 11 U1 1 U2 3 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0376-8716 J9 DRUG ALCOHOL DEPEN JI Drug Alcohol Depend. PD MAR PY 1996 VL 40 IS 3 BP 221 EP 225 DI 10.1016/0376-8716(95)01211-7 PG 5 WC Substance Abuse; Psychiatry SC Substance Abuse; Psychiatry GA UH959 UT WOS:A1996UH95900006 PM 8861400 ER PT J AU Ancona, MG AF Ancona, MG TI Single electron switches presage quantum computing SO ELECTRONICS WORLD LA English DT Editorial Material RP Ancona, MG (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU REED BUSINESS PUBLISHING LTD PI SUTTON PA QUADRANT HOUSE THE QUADRANT, SUTTON, SURREY, ENGLAND SM2 5AS SN 0959-8332 J9 ELECTRON WORLD JI Electron. World PD MAR PY 1996 IS 1720 BP 185 EP 185 PG 1 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA UD354 UT WOS:A1996UD35400012 ER PT J AU Chen, JC Wu, C AF Chen, JC Wu, C TI Optimization of a two-stage combined refrigeration system SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article DE refrigeration; optimization; combined cycle AB The optimal performance of a two-stage refrigeration system affected by the irreversibility of finite-rate heat transfer is analyzed by using an endoreversible combined cycle model with continuous flow. It is proven that the optimal coefficient of performance is a monotonically decreasing function of the specific cooling rate for a two-stage endoreversible combined refrigeration system. The optimal temperatures of the working fluid in the isothermal processes of a cycle are determined. The optimal distribution of the heat transfer areas are also discussed. The results obtained can provide a tool for practising engineers for designing two-stage refrigeration systems. RP Chen, JC (reprint author), USN ACAD,DEPT MECH ENGN,ANNAPOLIS,MD 21402, USA. RI Chen, JC/G-4088-2010 NR 4 TC 18 Z9 23 U1 1 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PD MAR PY 1996 VL 37 IS 3 BP 353 EP 358 DI 10.1016/0196-8904(95)00178-6 PG 6 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA TM318 UT WOS:A1996TM31800011 ER PT J AU Mushrush, GW Beal, EJ Slone, E Hardy, DR AF Mushrush, GW Beal, EJ Slone, E Hardy, DR TI Reaction of organosulfur compounds with naturally occurring peroxides in jet fuel SO ENERGY & FUELS LA English DT Article ID TERT-BUTYL HYDROPEROXIDE; HEXYL SULFIDE; LIQUID AB Polar heteroatomic species have been correlated with storage instability problems in both petroleum- and shale-derived middle distillate fuels, Instability is defined as the formation of filterable sediments and gums. Heteroatoms (oxygen, nitrogen, and sulfur) have been found to be greatly enhanced in such sediments. Trace levels of certain organosulfur compounds have been found to significantly influence the deposit formation process. Findings that free-radical inhibitors were ineffective in controlling the stability of shale-derived middle distillate fuels posed the question: is free-radical chemistry the key to distillate fuel instability with respect to deposit formation? The effectiveness of organic amines as additives suggests that acid/base chemistry was also involved in the formation of deposits. This paper reports on a study of organosulfur compounds employed as dopants with naturally occurring peroxide compounds in fuels. The product distribution from the dopant and the change in peroxide concentration was monitored. C1 GEORGE MASON UNIV,DEPT CHEM,FAIRFAX,VA 22030. RP Mushrush, GW (reprint author), USN,RES LAB,NAVY TECHNOL CTR SAFETY & SURVIVABIL,CODE 6181,WASHINGTON,DC 20375, USA. NR 30 TC 11 Z9 12 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD MAR-APR PY 1996 VL 10 IS 2 BP 504 EP 508 DI 10.1021/ef950179c PG 5 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA UB574 UT WOS:A1996UB57400032 ER PT J AU Fothergill, DM Grieve, DW Pinder, ADJ AF Fothergill, DM Grieve, DW Pinder, ADJ TI The influence of task resistance on the characteristics of maximal one and two-handed lifting exertions in men and women SO EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY LA English DT Article DE lifting strength; dynamometry; isometric; dynamic; mechanics ID POWER OUTPUT; STRENGTH; PREDICTION; CAPACITY; FORCE; MALES AB Dynamic lifting strength was assessed at lift velocities ranging from 0 to 1 m . s(-1) using a hydrodynamometer in which the viscous resistance to motion could be preset. Nine men and nine women performed one- and two-handed dynamic exertions against low, medium, and high resistances. The subjects were required to lift as forcefully and as fast as possible from a height of 400 mm to just above head height. The instantaneous forces recorded at knee, knuckle, hip, shoulder, elbow, and head heights were compared with those obtained during maximal one- and two-handed isometric lifts performed at the same heights. The position of peak force relative to stature was lower for one-handed lifts (35.9% of stature) than two- for handed lifts (38.4% of stature) (P < 0.005), but was unaffected by lift resistance (P > 0.05) and subject sex (P > 0.05). Lifting forces during two-handed exertions were on average 1.5 times greater than for one-handed exertions (P < 0.0001). However, the difference in the strength of one- and two-handed lifts was highly dependent on hand height (P < 0.0001) and task resistance (P < 0.005), and was greater for the men than for the women (P < 0.001). When static lifting strength was measured at heights relative to stature and normalized by dividing by body weight, there was no significant difference in performance between the men and the women [mean normalized female:male: (f:m) strength ratio = 0.76, P > 0.05]. Under dynamic conditions the sex difference in lifting performance was pronounced (mean normalized f:m strength ratio = 0.68, P < 0.01), especially for power output (mean f:m power unit body weight(-1) ratio = 0.52, P < 0.005). The proportion of generality (r(2) x 100) between dynamic and static lifting strength was found to range between 63% and 87%. These data suggest that the dynamic and static tests of lifting strength measured a common, intrinsic ability to produce maximal lifting forces. The finding that sex differences in strength are dependent on whether the exertion is static or dynamic has important implications for biomechanical models of human strength. C1 ROYAL FREE HOSP,SCH MED,DEPT ANAT,LONDON,ENGLAND. RP Fothergill, DM (reprint author), USN,MED RES INST,CODE 522,8901 WISCONSIN AVE,BETHESDA,MD 20889, USA. NR 32 TC 4 Z9 4 U1 1 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0301-5548 J9 EUR J APPL PHYSIOL O JI Eur. J. Appl. Physiol. Occup. Physiol. PD MAR PY 1996 VL 72 IS 5-6 BP 430 EP 439 DI 10.1007/BF00242272 PG 10 WC Physiology; Sport Sciences SC Physiology; Sport Sciences GA TZ752 UT WOS:A1996TZ75200007 PM 8925813 ER PT J AU Shaheen, H Shalaby, K Farid, Z Campbell, J Kamal, K AF Shaheen, H Shalaby, K Farid, Z Campbell, J Kamal, K TI Parasite-specific isotype and subclass antibody profiles during acute prepatent human schistosomiasis SO EXPERIMENTAL PARASITOLOGY LA English DT Article ID IGG SUBCLASSES; MANSONI; PROTEINS C1 AIN SHAMS UNIV,FAC SCI,DEPT BIOCHEM,CAIRO,EGYPT. RP Shaheen, H (reprint author), USN,MED RES UNIT 3,PSC 455,BOX 5000,FPO,AE 09835, USA. NR 13 TC 7 Z9 7 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0014-4894 J9 EXP PARASITOL JI Exp. Parasitol. PD MAR PY 1996 VL 82 IS 2 BP 222 EP 224 DI 10.1006/expr.1996.0028 PG 3 WC Parasitology SC Parasitology GA UJ135 UT WOS:A1996UJ13500017 PM 8617350 ER PT J AU ROBERTS, WR AF ROBERTS, WR TI PEACE AND DISARMAMENT - NAVAL RIVALRY AND ARMS CONTROL, 1922-1933 - FANNING,RW SO HISTORIAN LA English DT Book Review RP ROBERTS, WR (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU PHI ALPHA THETA PI ALLENTOWN PA THE HISTORIAN 50 COLLEGE DR, ALLENTOWN, PA 18104-6100 SN 0018-2370 J9 HISTORIAN JI Historian PD SPR PY 1996 VL 58 IS 3 BP 707 EP 708 PG 2 WC History SC History GA UY071 UT WOS:A1996UY07100083 ER PT J AU Williams, HP Hutchinson, S Wickens, CD AF Williams, HP Hutchinson, S Wickens, CD TI A comparison of methods for promoting geographic knowledge in simulated aircraft navigation SO HUMAN FACTORS LA English DT Article ID DESIGN; MEMORY AB In two experiments we evaluated different techniques for flight rehearsal to develop navigational knowledge about a region. In Experiment 1 different groups of pilots studied a map of a region, actively flew an IRIS simulator through the same region, or passively viewed the same dynamic screen as flown by the active participants. The latter two groups were subdivided into those that trained with high and low levels of scene detail. All pilots then transferred to a high-image-fidelity simulation to fly the same route. The transfer results indicated no effect of scene detail and that the active group performed best, the passive group worst, and the map group at an intermediate level. In Experiment 2 the workload of training was increased, and half the participants were required to train with a north-up map. These changes degraded the transfer performance of the active training group relative to the other two. The implications of the results for workload during rehearsal flights and the kinds of geographical knowledge acquired are discussed. C1 UNIV ILLINOIS,AVIAT RES LAB,SAVOY,IL 61874. USN,NAS,PENSACOLA,FL. USAF,WILLIAMS AFB,AZ. NR 28 TC 13 Z9 13 U1 0 U2 1 PU HUMAN FACTORS SOC PI SANTA MONICA PA BOX 1369, SANTA MONICA, CA 90406 SN 0018-7208 J9 HUM FACTORS JI Hum. Factors PD MAR PY 1996 VL 38 IS 1 BP 50 EP 64 DI 10.1518/001872096778940804 PG 15 WC Behavioral Sciences; Engineering, Industrial; Ergonomics; Psychology, Applied; Psychology SC Behavioral Sciences; Engineering; Psychology GA UP375 UT WOS:A1996UP37500004 ER PT J AU Volpe, CE CannonBowers, JA Salas, E Spector, PE AF Volpe, CE CannonBowers, JA Salas, E Spector, PE TI The impact of cross-training on team functioning: An empirical investigation SO HUMAN FACTORS LA English DT Article AB The effects of cross-training (presence vs. absence) and workload (high vs. low) on team processes, communication, and task performance were examined. Eighty male undergraduate students were randomly assigned to one of four training conditions: cross-training, low workload; cross-training, high workload; no cross-training, low workload; and no cross-training, high workload. Results indicated that cross-training was an important determinant of effective teamwork process, communication, and performance. Predicted interactions between cross-training and workload were not supported. Implications for the design and implementation of cross-training as a means to improve team functioning are discussed. C1 USN,AIR WARFARE CTR,TRAINING SYST DIV,ORLANDO,FL 32826. UNIV S FLORIDA,TAMPA,FL. OI Cannon-Bowers, Janis/0000-0003-2154-4456; Spector, Paul E./0000-0002-6881-8496 NR 31 TC 108 Z9 119 U1 2 U2 13 PU HUMAN FACTORS SOC PI SANTA MONICA PA BOX 1369, SANTA MONICA, CA 90406 SN 0018-7208 J9 HUM FACTORS JI Hum. Factors PD MAR PY 1996 VL 38 IS 1 BP 87 EP 100 DI 10.1518/001872096778940741 PG 14 WC Behavioral Sciences; Engineering, Industrial; Ergonomics; Psychology, Applied; Psychology SC Behavioral Sciences; Engineering; Psychology GA UP375 UT WOS:A1996UP37500007 PM 8682521 ER PT J AU VanOrden, KF Benoit, SL Osga, GA AF VanOrden, KF Benoit, SL Osga, GA TI Effects of cold air stress on the performance of a command and control task SO HUMAN FACTORS LA English DT Article ID MODERATE COLD; RESPONSES; EXPOSURE AB Performance on a simulated command and control warfare task was examined as a function of cold-air-induced adrenergic stress. Twenty participants who were experienced with naval war fighting systems completed a scripted 54-min scenario task while exposed to room temperatures of either 22 degrees C or 4 degrees C. The combined task and cold-exposure paradigm significantly elevated heart rate and catecholamine levels. Task performance was nearly identical for both groups for the scenario as a whole. During a 12-min portion of the scenario when hostilities were simulated, stressed participants were more liberal with missile fire and more conservative in their responses to commands requiring greater knowledge of the tactical situation. The responses to commands requiring participants to identify symbols with particular attributes were equivalent for both groups during the hostilities phase. The study demonstrates the utility of the task-independent stressor paradigm for the examination of complex task performance under stress. C1 USN,SUBMARINE MED RES LAB,GROTON,CT. USN,COMMAND CONTROL & OCEAN SURVEILLANCE CTR,SAN DIEGO,CA 92152. NR 28 TC 7 Z9 7 U1 0 U2 3 PU HUMAN FACTORS SOC PI SANTA MONICA PA BOX 1369, SANTA MONICA, CA 90406 SN 0018-7208 J9 HUM FACTORS JI Hum. Factors PD MAR PY 1996 VL 38 IS 1 BP 130 EP 141 DI 10.1518/001872096778940796 PG 12 WC Behavioral Sciences; Engineering, Industrial; Ergonomics; Psychology, Applied; Psychology SC Behavioral Sciences; Engineering; Psychology GA UP375 UT WOS:A1996UP37500010 ER PT J AU Preiss, SA Ellis, MT AF Preiss, SA Ellis, MT TI A manager's guide to TPS first article acceptance testing SO IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE LA English DT Article; Proceedings Paper CT Conference on System Readiness - Test Technology for the 21st-Century (AUTOTESCON 95) CY AUG 07-10, 1995 CL ATLANTA, GA SP AESS, Instrumentat & Measurement Soc AB This paper offers insight into the challenges of First Article Testing (FAT) for Test Program Sets. While FAT represents a successful culmination of extensive development effort, this success comes only with advanced planning and buyer/seller cooperation. This paper emphasizes FAT challenges and their resolution. The paper is written against a real-world contract backdrop, and the problems encountered were real and representative of the generic challenges. The lessons imparted can provide valuable guidance to buyer and seller in a Test Program Set contract sell-off. For the lessons-learned to be useful, however, they must be applied prior to FAT, and must result in effective, preemptive, bi-partisan management action. FAT is typically the end result of millions of dollars of expenditure and equivalent technical and emotional investment. It offers only two outcomes: ''win-win'' or ''lose-lose.'' This paper is intended to assist a win-win result. C1 TEST AUTOMAT INC,THOUSAND OAKS,CA 91360. RP Preiss, SA (reprint author), USN,AIR WARFARE CTR,WEAP DIV,ENGN & ACQUISIT BRANCH,WEAP & TARGETS SUPPORT EQUIPMENT DIV,POINT MUGU NAWC,CA 93042, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0885-8985 J9 IEEE AERO EL SYS MAG JI IEEE Aerosp. Electron. Syst. Mag. PD MAR PY 1996 VL 11 IS 3 BP 12 EP 17 DI 10.1109/62.486731 PG 6 WC Engineering, Aerospace; Engineering, Electrical & Electronic SC Engineering GA TY247 UT WOS:A1996TY24700005 ER PT J AU Sinha, SP Zaleski, A Ioannou, DE Campisi, GJ Hughes, HL AF Sinha, SP Zaleski, A Ioannou, DE Campisi, GJ Hughes, HL TI Hot hole induced interface state generation and annihilation in SOI MOSFET's SO IEEE ELECTRON DEVICE LETTERS LA English DT Article ID N-MOS TRANSISTORS; CHANNEL MOSFETS; DEGRADATION; ELECTRON; STRESS; MODEL AB The effects of pure hot hole injection in SOI MOSFET's are investigated, Pure hot hole injection is achieved by exploiting the opposite channel based carrier injection phenomenon, It is found that significant amounts of interface states are generated, some of which are annihilated by a subsequent hot electron injection pulse, A power law of the form D-it(t) = Kt(n) with n close to 0.25 was obtained, indicating a more complex, diffusion limited, electrochemical reaction at the interface than previously reported. C1 USN,RES LAB,WASHINGTON,DC 20375. RP Sinha, SP (reprint author), GEORGE MASON UNIV,DEPT ELECT & COMP ENGN,FAIRFAX,VA 22030, USA. NR 16 TC 3 Z9 5 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0741-3106 J9 IEEE ELECTR DEVICE L JI IEEE Electron Device Lett. PD MAR PY 1996 VL 17 IS 3 BP 121 EP 123 DI 10.1109/55.485187 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA TX682 UT WOS:A1996TX68200014 ER PT J AU Hunsucker, RD Rose, RB Adler, RW Lott, GK AF Hunsucker, RD Rose, RB Adler, RW Lott, GK TI Auroral-E mode oblique HF propagation and its dependence on auroral oval position SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Article AB The characteristics of 25.5 MHz one-hop mode propagation on a 950 km Alaskan path, over a one-year period shortly after sunspot maximum are presented as a function of the ''planetary geomagnetic index-Kp.'' The location of the E-region reflection point lies within the auroral oval for 3 < Kp < 5, and the specific behavior of the signal is related to auroral oval phenomena such as substorms, geomagnetic storms, and the ''harang discontinuity.'' The auroral electrojet location, with respect to the path midpoint, is also of considerable importance, The 75 watt CW beacon has been in continuous operation since mid-August 1991 on a frequency of 25.545 MHz, The signal is characterized by ''bursty'' behavior lasting from about one minute to over three hours, with an average duration of eleven minutes, We believe that this is the first quantitative demonstration of the ''forward propagation characteristics'' of a one- or two-hop E-propagation path inside and parallel to the auroral oval on a frequency at the high end of the HF band. C1 USN,POSTGRAD SCH,ECE DEPT,MONTEREY,CA 93943. RP Hunsucker, RD (reprint author), RP CONSULTANTS,KLAMATH FALLS,OR 97601, USA. NR 19 TC 8 Z9 8 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-926X J9 IEEE T ANTENN PROPAG JI IEEE Trans. Antennas Propag. PD MAR PY 1996 VL 44 IS 3 BP 383 EP 388 DI 10.1109/8.486308 PG 6 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA TZ871 UT WOS:A1996TZ87100016 ER PT J AU Freeman, P Zhang, XK Vurgaftman, I Singh, J Bhattacharya, P AF Freeman, P Zhang, XK Vurgaftman, I Singh, J Bhattacharya, P TI Optical control of 14 GHz MMIC oscillators based on InAlAs/InGaAs HBT's with monolithically integrated optical waveguides SO IEEE TRANSACTIONS ON ELECTRON DEVICES LA English DT Article AB An In(0.52)AI(0.48)As/In0.53Ga0.47As heterojunction bipolar transistor (HBT) with an novel integrated optical waveguide for light input has been developed. Detailed modeling is used to validate the design and simulate the coupling of light from the waveguide into the device. Fabricated waveguide-HBT devices exhibited cutoff frequencies of f(T) = 32 GHz and f(max) = 48 GHz with 56% of the guided light being converted to photocurrent. Fabricated MMIC oscillators operating at 13.9 GHz exhibited direct optical controllability in the form of optical tuning and injection locking, This is the highest reported frequency for direct optical injection locking in an HBT-based oscillator. C1 USN, RES LAB, WASHINGTON, DC 20375 USA. RP Freeman, P (reprint author), UNIV MICHIGAN, DEPT ELECT ENGN & COMP SCI, SOLID STATE ELECTR LAB, ANN ARBOR, MI 48109 USA. NR 17 TC 23 Z9 23 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 0018-9383 EI 1557-9646 J9 IEEE T ELECTRON DEV JI IEEE Trans. Electron Devices PD MAR PY 1996 VL 43 IS 3 BP 373 EP 379 DI 10.1109/16.485649 PG 7 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA TY217 UT WOS:A1996TY21700001 ER PT J AU Modiano, E Wieselthier, JE Ephremides, A AF Modiano, E Wieselthier, JE Ephremides, A TI A simple analysis of average queueing delay in tree networks SO IEEE TRANSACTIONS ON INFORMATION THEORY LA English DT Letter DE queueing networks; tandem queue; queueing delay; equivalent model; priority disciplines ID TIME AB We develop an approach to the analysis of average queueing delay in a tree network of discrete-time queues with constant service time. The analysis of such systems is pertinent to packet-switched data networks with fixed-length packets. Our solution is based on considering an equivalent network, in which at each node packets in transit are given priority over exogenous arrivals. The solution to the equivalent model is easily computed, and, hence, the solution to the original model can be obtained. C1 USN,RES LAB,DIV INFORMAT TECHNOL,WASHINGTON,DC 20375. UNIV MARYLAND,DEPT ELECT ENGN,COLLEGE PK,MD 20742. UNIV MARYLAND,SYST RES INST,COLLEGE PK,MD 20742. RP Modiano, E (reprint author), MIT,LINCOLN LAB,COMMUN DIV,244 WOOD ST,LEXINGTON,MA 02173, USA. NR 11 TC 8 Z9 8 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9448 J9 IEEE T INFORM THEORY JI IEEE Trans. Inf. Theory PD MAR PY 1996 VL 42 IS 2 BP 660 EP 664 DI 10.1109/18.485740 PG 5 WC Computer Science, Information Systems; Engineering, Electrical & Electronic SC Computer Science; Engineering GA UA147 UT WOS:A1996UA14700034 ER PT J AU Krowne, CM Neidert, RE AF Krowne, CM Neidert, RE TI Theory and numerical calculations for radially inhomogeneous circular ferrite circulators SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES LA English DT Article ID MILLIMETER-WAVE PROPAGATION; MAGNETIC WALLS; RESONATORS AB This paper presents a new theory for the operation of microstrip and stripline circulators, specially set up to permit radial variation of all the magnetic parameters. A computer code, taking only a few seconds per calculated point on a modest computer, was developed from the theory, and calculated results are given. In the theory we develop a two-dimensional (2-D) recursive Green's function G suitable for determining the electric field E(a) anywhere within a microstrip or stripline circulator. The recursive nature of G is a reflection of the inhomogeneous region being broken up into one inner disk containing a singularity and N annuli, G has the correct properties to allow matching to the external ports, thereby enabling s-parameters to be found for a three-port ferrite circulator. Because of the general nature of the problem construction, the ports may be located at arbitrary azimuthal angle phi and possess arbitrary line widths. Inhomogeneities may occur in the applied magnetic field H-app, magnetization 4 pi M(s), and demagnetization factor N-d. All magnetic inhomogeneity effects can be put into the frequency dependent tensor elements of the anisotropic permeability tensor. Numerical results are presented for the simpler but immensely practical case of symmetrically disposed ports of equal widths taking into account these radial inhomogeneities. Studies of breaking up the area into 1, 2, and 5 annuli are undertaken to treat specific inhomogeneous problems. The computer code which evaluates the recursive Green's function is very efficient and has no convergence problems. RP Krowne, CM (reprint author), USN,RES LAB,DIV ELECTR SCI & TECHNOL,MICROWAVE TECHNOL BRANCH,WASHINGTON,DC 20375, USA. NR 31 TC 31 Z9 31 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9480 J9 IEEE T MICROW THEORY JI IEEE Trans. Microw. Theory Tech. PD MAR PY 1996 VL 44 IS 3 BP 419 EP 431 DI 10.1109/22.486151 PG 13 WC Engineering, Electrical & Electronic SC Engineering GA UA150 UT WOS:A1996UA15000008 ER PT J AU Vaccaro, RJ Harrison, BF AF Vaccaro, RJ Harrison, BF TI Optimal matrix-filter design SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Letter AB A matrix filter produces N output values given a block of N input values, Matrix filters are particularly useful for filtering short data records (e.g., N less than or equal to 20), In this correspondence, we introduce a new set of matrix-filter design criteria and show that the design of a matrix filter ran be formulated as a convex optimization problem, Several examples are given of lowpass and bandpass designs as well as a Hilbert transformer design. C1 USN,UNDERSEA WARFARE CTR,NEWPORT,RI 02841. RP Vaccaro, RJ (reprint author), UNIV RHODE ISL,DEPT ELECT ENGN,KINGSTON,RI 02881, USA. NR 6 TC 24 Z9 36 U1 2 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1053-587X J9 IEEE T SIGNAL PROCES JI IEEE Trans. Signal Process. PD MAR PY 1996 VL 44 IS 3 BP 705 EP 709 DI 10.1109/78.489044 PG 5 WC Engineering, Electrical & Electronic SC Engineering GA UF713 UT WOS:A1996UF71300025 ER PT J AU Creusere, CD Mitra, SK AF Creusere, CD Mitra, SK TI Efficient audio coding using perfect reconstruction noncausal IIR filter banks SO IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING LA English DT Article ID DIGITAL COMPACT CASSETTE; DESIGN; DCC AB In this paper, we consider the problem of implementing perfect reconstruction modulated polyphase filter banks having infinite impulse response (IIR) subfilters in systems that must process infinite length 1-D inputs. This task is complicated by the fact that the synthesis bank needed to ensure perfect reconstruction in such a system generally has noncausal or reverse-time filter sections. To overcome this limitation, we develop a number of unique buffering schemes that make possible the implementation of such reverse-time filters with infinite length signals. For the important special case when the polyphase subfilters are allpass, we also present a method that allows for very efficient implementation of tree-structured filter banks and wavelet transforms. We then describe a wideband coding algorithm based largely on work done by Lokhoff and Johnston. Using this algorithm, we compare the performance of IIR filter banks with that of more conventional pseudo-QMF and tree-structured QMF banks. The results of these comparisons indicate that one of our filter banks-a tree-structured allpass bank-achieves slightly better performance than equivalent FIR banks in terms of rate and distortion (both objectively and subjectively measured) while requiring lower computational complexity. RP Creusere, CD (reprint author), USN,AIR WARFARE CTR,WEAP DIV,CHINA LAKE,CA 93555, USA. NR 24 TC 7 Z9 7 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1063-6676 J9 IEEE T SPEECH AUDI P JI IEEE Trans. Speech Audio Process. PD MAR PY 1996 VL 4 IS 2 BP 115 EP 123 DI 10.1109/89.486061 PG 9 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA UC347 UT WOS:A1996UC34700005 ER PT J AU Sengupta, K AbdelHamid, TK AF Sengupta, K AbdelHamid, TK TI The impact of unreliable information on the management of software projects: A dynamic decision perspective SO IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART A-SYSTEMS AND HUMANS LA English DT Article ID COMPLEX-SYSTEMS; FEEDBACK; MISPERCEPTIONS AB The task of managing software projects is universally plagued by cost and schedule overruns. A fundamental problem in software projects is the presence of unreliable information, in initial information as well as in subsequent status reports, We report an experiment that investigates decision making in software projects as exemplars of complex, dynamic environments reactive to the actions of the decision maker. The experiment shows that in coping with unreliable information in such environments, decision makers are susceptible to self-fulfilling prophesies created by the environment, and are prone to demonstrate conservatism. A process tracing extension of the experiment shows that subjects demonstrate a low capacity for handling complexity. The implications of the results for managing software projects and for research in dynamic decision making are discussed. RP Sengupta, K (reprint author), USN,POSTGRAD SCH,DEPT SYST MANAGEMENT,MONTEREY,CA 93943, USA. NR 50 TC 17 Z9 17 U1 1 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1083-4427 J9 IEEE T SYST MAN CY A JI IEEE Trans. Syst. Man Cybern. Paart A-Syst. Hum. PD MAR PY 1996 VL 26 IS 2 BP 177 EP 189 DI 10.1109/3468.485744 PG 13 WC Computer Science, Cybernetics; Computer Science, Theory & Methods SC Computer Science GA UC998 UT WOS:A1996UC99800001 ER PT J AU Brown, GG Dell, RF Farmer, RA AF Brown, GG Dell, RF Farmer, RA TI Scheduling Coast Guard district cutters SO INTERFACES LA English DT Article DE programming, integer; applications; government; US Coast Guard AB United States Coast Guard (USCG) districts schedule cutters 180 feet or less in length to weekly statuses (statuses is USCG jargon for assignments) from which they primarily respond to calls for search and rescue, law enforcement, and pollution control. The First Coast Guard District, based in Boston, has one of the largest scheduling problems: Each of 16 cutters is assigned weekly to one of six statuses to ensure patrol coverage, enforce equitable distribution of patrols, and honor restrictions on consecutive cutter statuses. When we state this quarterly scheduling problem as an elastic mixed-integer linear program, we obtain face-valid schedules-superior to manually prepared schedules for all measures of effectiveness considered within a few minutes on a personal computer. Initial acceptance of the model was hampered by disruptive schedule revisions that resulted from minor changes in input. Modifications to presence run-to-run persistence of solutions have brought success. C1 US COAST GUARD,WASHINGTON,DC 20593. RP Brown, GG (reprint author), USN,POSTGRAD SCH,DEPT OPERAT RES,MONTEREY,CA 93943, USA. NR 15 TC 14 Z9 14 U1 0 U2 4 PU INST OPERATIONS RESEARCH MANAGEMENT SCIENCES PI LINTHICUM HTS PA 901 ELKRIDGE LANDING RD, STE 400, LINTHICUM HTS, MD 21090-2909 SN 0092-2102 J9 INTERFACES JI Interfaces PD MAR-APR PY 1996 VL 26 IS 2 BP 59 EP 72 DI 10.1287/inte.26.2.59 PG 14 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA UG792 UT WOS:A1996UG79200006 ER PT J AU Johnstone, PAS Laskin, WB DeLuca, AM Barnes, M Kinsella, TJ Sindelar, WF AF Johnstone, PAS Laskin, WB DeLuca, AM Barnes, M Kinsella, TJ Sindelar, WF TI Tumors in dogs exposed to experimental intraoperative radiotherapy SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article DE canine; carcinogenesis; intraoperative radiotherapy; radiation oncology ID RADIATION-THERAPY; TOLERANCE; IRRADIATION; IORT; SARCOMAS; BEAM AB Purpose: The frequency of radiation-induced neoplasms was determined in dogs enrolled in the National Cancer Institute canine trials of intraoperative radiotherapy (IORT). Methods and Materials: Twelve protocols assessing normal tissue response to IORT involved 238 dogs in a 15-year trial. Eighty-one dogs were followed for > 24 months postoperatively and were assessed for tumor development; 59 of these animals received IORT. Results: Twelve tumors occurred in the 59 dogs receiving IORT, Nine were in the IORT portals and were considered to be radiation induced. No tumors occurred in 13 sham animals or in 9 animals treated with external beam radiotherapy alone, The frequency of radiation-induced malignancies in dogs receiving IORT was 15%, and was 25% in animals receiving greater than or equal to 25 Gy IORT. Frequency of all tumors, including spontaneous lesions, was 20%. Conclusions: Intraoperative radiotherapy contributed to a high frequency of sarcoma induction in these dogs, Unknown to date in humans involved in clinical trials of IORT, this potential complication should be looked for as long-term survivors are followed. C1 NCI, NIH, RBB, BETHESDA, MD 20892 USA. NCI, NIH, SURG BRANCH, BETHESDA, MD 20892 USA. NATL NAVAL MED CTR, DIV PATHOL, BETHESDA, MD 20814 USA. HOSP UNIV PENN, DEPT RADIAT ONCOL, PHILADELPHIA, PA 19104 USA. UNIV WISCONSIN, CTR CANC, DEPT HUMAN ONCOL, MADISON, WI 53792 USA. USN, MED CTR, DIV RADIAT ONCOL, SAN DIEGO, CA 92134 USA. NR 25 TC 20 Z9 20 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-3016 J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PD MAR 1 PY 1996 VL 34 IS 4 BP 853 EP 857 DI 10.1016/0360-3016(95)02118-3 PG 5 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA UA185 UT WOS:A1996UA18500012 PM 8598362 ER PT J AU Hasson, DF AF Hasson, DF TI Reflections on issues from JOM's past SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Editorial Material RP Hasson, DF (reprint author), USN ACAD,DEPT MECH ENGN,ANNAPOLIS,MD 21402, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD MAR PY 1996 VL 48 IS 3 BP 80 EP 80 PG 1 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA UA869 UT WOS:A1996UA86900016 ER PT J AU Howard, RM Bray, RM Lyons, DF AF Howard, RM Bray, RM Lyons, DF TI Flying-qualities analysis of an unmanned air vehicle SO JOURNAL OF AIRCRAFT LA English DT Article AB Flight tests of a half-scale radio-controlled model of the Pioneer unmanned air vehicle (UAV) were conducted for static longitudinal and lateral-directional stability-and-control characteristics. The air vehicle was instrumented to measure control-surface deflections, angle of attack, sideslip angle, and airspeed; telemetry was used to downlink the data to a ground recorder for later processing. A wind-tunnel test of a 0.4-scale Pioneer at full-scale Reynolds numbers was also carried out, as well as a numerical study using a low-order panel method. The flight-test determination of the neutral point agrees well with the other methods of prediction and indicated that the static margin was sufficient to open the restricted c.g. envelope. Other control-related considerations may provide overriding concerns, however. Crosswind limits were determined from steady-sideslip maneuvers and the flight data compared very favorably to that of the other data sources. Low-cost scaled-vehicle flight testing appears to be a viable tool in providing aerodynamic data for UAV simulation and training purposes. RP Howard, RM (reprint author), USN,POSTGRAD SCH,DEPT AERONAUT & ASTRONAUT,CODE AA-HO,MONTEREY,CA 93943, USA. NR 15 TC 0 Z9 1 U1 0 U2 4 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 1996 VL 33 IS 2 BP 331 EP 336 DI 10.2514/3.46942 PG 6 WC Engineering, Aerospace SC Engineering GA UD291 UT WOS:A1996UD29100013 ER PT J AU Tai, TC AF Tai, TC TI Simulation and analysis of V-22 tiltrotor aircraft forward-flight flowfield SO JOURNAL OF AIRCRAFT LA English DT Article ID VORTICAL FLOWS AB The flowfield about a wing-fuselage-nacelle configuration of the V-22 tiltrotor aircraft at a freestream Mach number of 0.345 and angles of attack ranging from 7 to 16 deg is simulated by using a multizone, thin-layer Navier-Stokes method The flow conditions yield a Reynolds number of 18.2 x 10(6) based on the wing chord for flight at an altitude of 10,000 ft. Major flow features including the three-dimensional flow separation from viscous-vortex interactions observed experimentally are captured by the simulation. The massive separation from the wing and the fore fuselage-sponson region for hows at high angles of attack creates free vortices that pass by the rear fuselage region, including the tail section of the aircraft. RP Tai, TC (reprint author), USN,CTR SURFACE WARFARE,CARDEROCK DIV,SEA BASED AVIAT OFF,BETHESDA,MD 20084, USA. NR 22 TC 3 Z9 3 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 1996 VL 33 IS 2 BP 369 EP 376 DI 10.2514/3.46947 PG 8 WC Engineering, Aerospace SC Engineering GA UD291 UT WOS:A1996UD29100018 ER PT J AU Porter, DB Howard, RM AF Porter, DB Howard, RM TI Aerodynamic interference of dissimilar aircraft flying in close proximity SO JOURNAL OF AIRCRAFT LA English DT Article C1 USN,POSTGRAD SCH,AERONAUT ENGN CURRICULUM,MONTEREY,CA 93943. NR 6 TC 0 Z9 0 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 1996 VL 33 IS 2 BP 440 EP 441 DI 10.2514/3.46958 PG 2 WC Engineering, Aerospace SC Engineering GA UD291 UT WOS:A1996UD29100029 ER PT J AU Buchanan, JL Gilbert, RP AF Buchanan, JL Gilbert, RP TI Transmission loss in the far field over a seabed with rigid substrate assuming the Biot sediment model SO JOURNAL OF COMPUTATIONAL ACOUSTICS LA English DT Article ID FINITE-DEPTH OCEAN AB A system of differential equations is derived from Blot's constitutive and motion equations for a poroelastic material. The seabed is modeled as a poroelastic layer over a rigid substrate. A residue expansion for pressure in the far field is found in the case of constant parameters. The model's prediction for transmission loss is examined for five different types of sediments. C1 UNIV DELAWARE,DEPT MATH SCI,NEWARK,DE 19716. RP Buchanan, JL (reprint author), USN ACAD,DEPT MATH,ANNAPOLIS,MD 21402, USA. NR 15 TC 6 Z9 6 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0218-396X J9 J COMPUT ACOUST JI J. Comput. Acoust. PD MAR PY 1996 VL 4 IS 1 BP 29 EP 54 DI 10.1142/S0218396X96000210 PG 26 WC Acoustics; Mathematics, Interdisciplinary Applications SC Acoustics; Mathematics GA UZ909 UT WOS:A1996UZ90900004 ER PT J AU Raouf, RA Palazotto, AN AF Raouf, RA Palazotto, AN TI Nonlinear dynamics of unidirectional, fiber-reinforced tori SO JOURNAL OF ENGINEERING MECHANICS-ASCE LA English DT Article ID STRESS AB The symbolic manipulator Mathematica is used to model the nonlinear dynamic behavior of closed, elastic toroidal shells. Transverse shears are neglected and the nonlinearities are of the Von Karman type. Two fiber-reinforcing schemes are considered: reinforcement with fibers along the major direction of the torus, and reinforcement with fibers along the minor direction of the torus. These schemes result in orthotropic material characteristics. Differential geometry is used to derive the nonlinear kinematic relationships, and a combination of the Rayleigh-Ritz technique and the method of harmonic balance is used to approximate the nonlinear natural frequencies of the tori. Numerical examples show that the linear natural frequency increases as the fiber volume fraction increases for any radii ratio. On the other hand, the nonlinear analysis of some reinforcing schemes shows a competition between the geometric and material parameters of the tori. This competition has a significant effect on the qualitative behavior of the torus and demarks the borders separating shell-like behavior and ring like behavior. C1 USAF,INST TECHNOL,DEPT AERONAUT & ASTRONAUT,WRIGHT PATTERSON AFB,OH 45433. RP Raouf, RA (reprint author), USN ACAD,DEPT ENGN MECH,ANNAPOLIS,MD 21402, USA. NR 17 TC 4 Z9 4 U1 0 U2 1 PU ASCE-AMER SOC CIVIL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9399 J9 J ENG MECH-ASCE JI J. Eng. Mech.-ASCE PD MAR PY 1996 VL 122 IS 3 BP 271 EP 276 DI 10.1061/(ASCE)0733-9399(1996)122:3(271) PG 6 WC Engineering, Mechanical SC Engineering GA TX575 UT WOS:A1996TX57500011 ER PT J AU Cargill, PJ Chen, J Spicer, DS Zalesak, ST AF Cargill, PJ Chen, J Spicer, DS Zalesak, ST TI Magnetohydrodynamic simulations of the motion of magnetic flux tubes through a magnetized plasma SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID EARTHS MAGNETOSPHERE; CONVECTION ZONE; CLOUDS; RECONNECTION; FIELDS; TOPOLOGY; SHOCK AB Magnetohydrodynamic simulations of the evolution of a flux tube accelerated through a stationary magnetized plasma are presented. As the flux tube. moves through the external plasma, its shape becomes distorted and reconnection can take place between the flux tube and external fields. The coupling between the moving flux tube and the external plasma is generally efficient, with simulated flux tube velocities many times smaller than those expected from frictionless motion. The reconnection between the flux tube and external field takes place when there is a unidirectional external field component in the direction of flux tube propagation. The reconnection is intrinsically nonsymmetric around the flux tube boundary. The principal reconnection site is at the rear of the flux tube, where strong vortices convect the external field toward the flux tube. Drag coefficients (C-D) that parameterize this interaction have been determined. When the flux tube is continually accelerated, C-D > 1 is appropriate, consistent with previously used ad hoc values. Examples of when the flux tube is accelerated for a short time but allowed to continue interacting with the external plasma are presented. It is shown that in the absence of reconnection, the coupling time is several Alfven wave transit times across the flux tube. However, when reconnection takes place, this coupling can cease to occur, and the flux tube may move frictionlessly (C-D approximate to 0). The results are discussed in terms of interplanetary magnetic clouds, and it is suggested that the observations of comoving coronal mass ejection and solar wind plasma can be accounted for by drag between the two. C1 NASA, GODDARD SPACE FLIGHT CTR, CTR COMPUTAT SCI, GREENBELT, MD 20771 USA. RP Cargill, PJ (reprint author), USN, RES LAB, DIV PLASMA PHYS, BEAM PHYS BRANCH, CODE 6790, WASHINGTON, DC 20375 USA. NR 35 TC 110 Z9 111 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-SPACE JI J. Geophys. Res-Space Phys. PD MAR 1 PY 1996 VL 101 IS A3 BP 4855 EP 4870 DI 10.1029/95JA03769 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TY349 UT WOS:A1996TY34900008 ER PT J AU Chang, CO Liu, LZ Alfriend, KT AF Chang, CO Liu, LZ Alfriend, KT TI Dynamics and stability of a freely precessing spacecraft containing a nutation damper SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Article AB The stability of a torque-free inertially symmetric spinning spacecraft containing a partially filled viscous ring nutation damper and the performance of this damper on the removal of the wobble motion of the spacecraft are investigated. The motion behavior about three different relative equilibria are studied. The equations for stability conditions and decay time constant for these three relative equilibria are obtained in explicit form. The effects of parameters of the spacecraft and damper on the stability criteria and decay time constant are quite different for these three equilibria, Numerical solutions show that when the motion about one of these three relative equilibria loses its stability, it converges to either one of the other two, depending on which stability criterion is satisfied. C1 USN,POSTGRAD SCH,MONTEREY,CA 93943. RP Chang, CO (reprint author), NATL TAIWAN UNIV,COLL ENGN,INST APPL MECH,TAIPEI 10764,TAIWAN. NR 18 TC 3 Z9 3 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0731-5090 J9 J GUID CONTROL DYNAM JI J. Guid. Control Dyn. PD MAR-APR PY 1996 VL 19 IS 2 BP 297 EP 304 DI 10.2514/3.21618 PG 8 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA UA391 UT WOS:A1996UA39100006 ER PT J AU Ross, IM AF Ross, IM TI Formulation of stability conditions for systems containing driven rotors SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Article AB The much maligned energy-sink analysis is revisited to derive stability conditions for a dual-spin spacecraft that is subjected to possible energy additions by the motor torque. Landon's old idea of subtracting the work done by the motor torque from the energy function is applied to the case when both the platform and the rotor are quasirigid. This is made possible by way of a separation axiom that allows one to obtain an expression for the motor torque. It is shown that this process leads naturally to a symmetric stability condition expressible in terms of Hubert's core energy. RP Ross, IM (reprint author), USN,POSTGRAD SCH,DEPT AERONAUT & ASTRONAUT,MAIL CODE AA-RO,MONTEREY,CA 93943, USA. NR 17 TC 3 Z9 3 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0731-5090 J9 J GUID CONTROL DYNAM JI J. Guid. Control Dyn. PD MAR-APR PY 1996 VL 19 IS 2 BP 305 EP 308 DI 10.2514/3.21619 PG 4 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA UA391 UT WOS:A1996UA39100007 ER PT J AU Niewoehner, RJ Kaminer, II AF Niewoehner, RJ Kaminer, II TI Integrated aircraft-controller design using linear matrix inequalities SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Article AB A new methodology is presented for solving the problem of optimizing the aircraft parameters, such as the size of its control surfaces, while meeting open- and closed-loop static and dynamic performance requirements. The approach proposed involves rewriting these requirements as linear matrix inequalities and solving a related constrained optimization problem for which efficient numerical solutions are available. RP Niewoehner, RJ (reprint author), USN,POSTGRAD SCH,DEPT AERONAUT & ASTRONAUT,MONTEREY,CA 93943, USA. NR 19 TC 22 Z9 22 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0731-5090 J9 J GUID CONTROL DYNAM JI J. Guid. Control Dyn. PD MAR-APR PY 1996 VL 19 IS 2 BP 445 EP 452 DI 10.2514/3.21638 PG 8 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA UA391 UT WOS:A1996UA39100026 ER PT J AU Howerton, MM Burns, WK Gopalakrishnan, GK AF Howerton, MM Burns, WK Gopalakrishnan, GK TI SBS suppression using a depolarized source for high power fiber applications SO JOURNAL OF LIGHTWAVE TECHNOLOGY LA English DT Article AB A depolarized source for fiber applications is demonstrated using a traveling wave LiNbO3 phase modulator, The source suppresses stimulated Brillouin scattering (SBS) in the fiber when operated at high drive frequencies, enabling more power to be delivered to a remote location, The threshold for SBS is examined in detail using optical powers up to 150 mW and drive frequencies up to 4 GHz. A resonant enhancement technique is demonstrated which reduces the drive power requirement for frequencies < 2 GHz by up to 7.6 dB. C1 USN,RES LAB,WASHINGTON,DC 20375. GEN INSTRUMENT CORP,HATBORO,PA 19040. RP Howerton, MM (reprint author), SFA INC,NAVAL RES LAB,CODE 5671,WASHINGTON,DC 20375, USA. NR 10 TC 4 Z9 4 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0733-8724 J9 J LIGHTWAVE TECHNOL JI J. Lightwave Technol. PD MAR PY 1996 VL 14 IS 3 BP 417 EP 422 DI 10.1109/50.485602 PG 6 WC Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA UB192 UT WOS:A1996UB19200023 ER PT J AU Sui, XY Scherge, M Kryder, MH Snyder, JE Harris, VG Koon, NC AF Sui, XY Scherge, M Kryder, MH Snyder, JE Harris, VG Koon, NC TI Barium ferrite thin-film recording media SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 6th International Conference on Magnetic Recording Media CY JUL 16-19, 1995 CL OXFORD, ENGLAND SP Anacomp Data Prod Ltd, BASF Ag, 3M Ctr, St Paul, USA, MMIS, Oxford Instruments Ltd, CAMST Project CEC, UK Inst Phys, Magnet Crp ID HEXAFERRITE AB Both longitudinal and perpendicular barium ferrite thin films are being pursued as overcoatless magnetic recording media. In this paper, prior research on thin-film Ba ferrite is reviewed and the most recent results are presented. Self-textured high-coercivity longitudinal Ba ferrite thin films have been achieved using conventional rf diode sputtering. Microstructural studies show that c-axis in-plane oriented grains have a characteristic acicular shape, while c-axis perpendicularly oriented grains have a platelet shape. Extended X-ray absorption fine structure (EXAFS) measurements indicate that the crystal orientations are predetermined by the structural anisotropy in the as-sputtered 'amorphous. state. Recording tests on 1500 Oe coercivity longitudinal Ba ferrite disks show performance comparable with that of a 1900 Oe Co alloy disk. To further improve the recording performance, both grain size and aspect ratio need to be reduced. Initial tribological tests indicate high hardness of Ba ferrite thin films. However, surface roughness needs to be reduced. For future ultrahigh-density contact recording, it is believed that perpendicular recording may be used. A thin Pt underlayer has been found to be capable of producing Ba ferrite thin films with excellent c-axis perpendicular orientation. C1 UNIV PITTSBURGH,CTR DATA STORAGE SYST,PITTSBURGH,PA 15213. SEAGATE TECHNOL,BLOOMINGTON,MN 55435. USN,RES LAB,WASHINGTON,DC 20375. RI Harris, Vincent/A-8337-2009 NR 24 TC 57 Z9 62 U1 0 U2 14 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD MAR PY 1996 VL 155 IS 1-3 BP 132 EP 139 DI 10.1016/0304-8853(95)00722-9 PG 8 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA UU485 UT WOS:A1996UU48500042 ER PT J AU Guo, Y Woznicki, P Barkatt, A Saad, EE Talmy, IG AF Guo, Y Woznicki, P Barkatt, A Saad, EE Talmy, IG TI Sol-gel synthesis of microcrystalline rare earth orthophosphates SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID NMR CHEMICAL-SHIFTS; PHOSPHATES; GLASSES; SPECTRA AB Studies of the reactions between rare earth salts and phosphoric acid in aqueous or ethanolic media have shown that in both cases stable gels can be formed. Upon drying, gels prepared in aqueous environments yield macrocrystalline REPO(4) products similar to those produced by conventional precipitation and drying. Gels prepared in ethanol, on the other hand, undergo dehydration to form dense microcrystalline products. This observation is based on optical and scanning electron microscopy, as well as on x-ray diffraction studies and infrared spectroscopy. These techniques, as well as differential thermal analysis, indicate that crystal growth of these products takes place around 600-700 degrees C. The composition of the dehydrated gels produced in both the aqueous and ethanolic systems corresponds to an orthophosphate structure. Other characteristics of the microcrystalline REPO(4) products include high resistance to attack by water, absence of coloration upon exposure to gamma rays, and a high index of refraction. C1 CATHOLIC UNIV AMER,DEPT CHEM,WASHINGTON,DC 20064. MILES CORP,BALTIMORE,MD 21224. USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20910. NR 23 TC 38 Z9 39 U1 1 U2 5 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD MAR PY 1996 VL 11 IS 3 BP 639 EP 649 DI 10.1557/JMR.1996.0077 PG 11 WC Materials Science, Multidisciplinary SC Materials Science GA TY914 UT WOS:A1996TY91400012 ER PT J AU Reeve, SW Weimer, WA Dandy, DS AF Reeve, SW Weimer, WA Dandy, DS TI On the optimization of a dc arcjet diamond chemical vapor deposition reactor SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID LASER-INDUCED FLUORESCENCE; OPTICAL-EMISSION SPECTROSCOPY; RAMAN-SPECTROSCOPY; GLOW-DISCHARGES; PLASMAS; FILMS; DIAGNOSTICS; HYDROGEN; GROWTH; OXYGEN AB Based on results from chemical kinetic model calculations, a method to improve diamond film growth in a de arcjet chemical vapor deposition reactor has been developed. Introducing the carbon source gas (CH4) into an Ar/H-2 plasma in close proximity to the substrate produced diamond films exhibiting simultaneous improvements in quality and mass deposition rates. These improvements result from a reduced residence time of the methane in the plasma which inhibits the hydrocarbon chemistry in the gas from proceeding significantly beyond methyl radical production prior to encountering the substrate, Improvements in growth rate were modest, increasing by only a factor of two. Optical emission actinometry measurements indicate that the flux of atomic hydrogen across the stagnation layer to the substrate is mass diffusion limited. Since diamond growth depends upon the flux of atomic H to the substrate, these results suggest that under the conditions examined here, a low atomic H flux to the substrate poses an upper limit on the attainable diamond growth rate. C1 USN,AIR WARFARE CTR,DIV CHEM,CHINA LAKE,CA 93555. COLORADO STATE UNIV,DEPT CHEM ENGN,FT COLLINS,CO 80523. RI Dandy, David/G-6984-2012 OI Dandy, David/0000-0003-3254-0717 NR 33 TC 4 Z9 4 U1 0 U2 1 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD MAR PY 1996 VL 11 IS 3 BP 694 EP 702 DI 10.1557/JMR.1996.0084 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA TY914 UT WOS:A1996TY91400019 ER PT J AU Rice, RW Wu, CC McKinney, KR AF Rice, RW Wu, CC McKinney, KR TI Fracture and fracture toughness of stoichiometric MgAl2O4 crystals at room temperature SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID STRENGTH AB The fracture toughness and path of stoichiometric spinel (MgAl2O4) crystals were determined at 22 degrees C for key low-index planes by double cantilever beam, as well as fractography of flexure specimens failing from either machining or indentation flaws. These results are compared with other single and polycrystalline MgAl2O4 fracture toughness values measured by various techniques, as well as single crystal versus polycrystal results for other materials. Evaluation of experimental and theoretical results shows (1)the fracture toughness of the spinel {110} plane is only a limited amount (e.g. 6%) higher than for the {100} plane (similar to 1.2 MPa m(1/2)), (2) fractography of machining flaw fracture origins was the most effective source of K-IC results, and (3) caution must be used in applying fracture toughness techniques to single crystals. Cautions include accounting for possible effects of elastic anisotropy (especial ly for double cantilever beam and probably double torsion tests), the nature of failure-initiating flaws (especial ly for notch-beam tests), and the frequent lack of symmetric plastic deformation and fracture (especially for indentation techniques). RP Rice, RW (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 32 TC 7 Z9 7 U1 1 U2 3 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD MAR 1 PY 1996 VL 31 IS 5 BP 1353 EP 1360 DI 10.1007/BF00353117 PG 8 WC Materials Science, Multidisciplinary SC Materials Science GA UC072 UT WOS:A1996UC07200027 ER PT J AU Magann, EF Winchester, MI Martin, JN Carter, DP Bass, JD Morrison, JC AF Magann, EF Winchester, MI Martin, JN Carter, DP Bass, JD Morrison, JC TI Administrative occupations have an adverse effect on pregnancy outcome in an active-duty enlisted population SO JOURNAL OF MATERNAL-FETAL INVESTIGATION LA English DT Article DE occupation; pregnancy outcome ID PHYSICAL-ACTIVITY; PRETERM DELIVERY; BIRTH-WEIGHT AB Objective: To evaluate the impact of specific occupations on adverse pregnancy complications. Methods: This retrospective cohort study assessed pregnancy outcome in 612 active-duty women. Based on her military occupational specialty, each patient was assigned to one of four groups. Group I had mild to moderate mental stress (administrative positions), group II intensive mental stress (air traffic controllers and radar technicians), group III minimal to mild mental stress and moderate physical stress with exposure to hazardous materials (maintenance and mechanics), and group IV moderate to intensive physical stress (military police and corpsmen). The main outcomes studied were cesarean or operative vaginal delivery, 5-min Apgar score < 7, intrauterine growth restriction, intrauterine fetal demise, hypertensive complications of pregnancy, preterm labor, transfer to a tertiary care facility, placental abruption, and postpartum hemorrhage. Results: The number of pregnancies by military occupational specialty were as follows: group I, 221; group II, 126; group III, 169; and group IV, 96. Further examination of military occupational specialty by marital status and race revealed no disparities of distribution among the four groups. There was a higher complication rate in group I (64%) as compared with 52, 47, and 53% in groups II, III, and IV, respectively (P = 0.009). Conclusions: Administrative occupations in which physically fit women in which the women have mild to moderate mental stress with little control over their working environment have an increased rate of pregnancy complications. C1 UNIV MISSISSIPPI,MED CTR,DEPT OBSTET & GYNECOL,JACKSON,MS 39216. UNIV MISSISSIPPI,MED CTR,DEPT PREVENT MED,JACKSON,MS 39216. USN HOSP,CAMP LEJEUNE,NC. USN HOSP,PENSACOLA,FL. NR 15 TC 0 Z9 0 U1 0 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0939-6322 J9 J MATERN-FETAL INVES JI J. Matern.-Fetal Invest. PD SPR PY 1996 VL 6 IS 2 BP 83 EP 86 PG 4 WC Obstetrics & Gynecology SC Obstetrics & Gynecology GA UL913 UT WOS:A1996UL91300008 ER PT J AU Perrin, PJ Scott, D Davis, TA Gray, GS Doggett, MJ Abe, R June, CH Racke, MK AF Perrin, PJ Scott, D Davis, TA Gray, GS Doggett, MJ Abe, R June, CH Racke, MK TI Opposing effects of CTLA4-Ig and anti-CD80 (B7-1) plus anti-CD86(B7-2) on experimental allergic encephalomyelitis SO JOURNAL OF NEUROIMMUNOLOGY LA English DT Article DE B7 receptors; CD80; CD86; CTLA-4; experimental allergic encephalomyelitis; interleukin-10; interleukin-2; interferon-gamma; tumor necrosis factor-alpha ID T-CELL ACTIVATION; MYELIN BASIC-PROTEIN; AUTOIMMUNE DEMYELINATION; CLONAL ANERGY; LYMPHOCYTE-T; CTLA-4; ANTIGEN; LIGAND; CD28; ANTIBODIES AB The roles of the B7 receptors, CD80 and CD86, during actively induced experimental allergic encephalomyelitis were examined with specific monoclonal antibodies and CTLA4-Ig. Injection of CTLA4-Ig on day 2 post-immunization resulted in decreased incidence and severity of resultant disease. Anti-CD80 injection on day 2 blocked development of the first disease episode. Subsequent relapses were unaffected. In contrast, injection of anti-CD86 alone had no effect. Surprisingly, combined anti-CD80 + anti-CD86 monoclonal antibody injection on day 2 resulted in marked exacerbation of disease. Examination of cytokine production in the draining lymph node cells demonstrated a reduction in both interferon (IFN)-gamma and interleukin (IL)-2 producing cells, but a dramatic increase in tumor necrosis factor (TNF)-alpha secretion in animals receiving both monoclonal antibodies. These results suggest distinct roles for CD80 and CD86 in the initiation of EAE, resulting in the diverse clinical outcomes observed in this model of EAE. C1 US FDA,BETHESDA,MD 20892. REPLIGEN CORP,CAMBRIDGE,MA 02139. WASHINGTON UNIV,SCH MED,DEPT NEUROL,ST LOUIS,MO 63110. RP Perrin, PJ (reprint author), USN,MED RES INST,IMMUNE CELL BIOL PROGRAM,MAIL STOP 06,BETHESDA,MD 20889, USA. NR 48 TC 37 Z9 37 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0165-5728 J9 J NEUROIMMUNOL JI J. Neuroimmunol. PD MAR PY 1996 VL 65 IS 1 BP 31 EP 39 DI 10.1016/0165-5728(95)00172-7 PG 9 WC Immunology; Neurosciences SC Immunology; Neurosciences & Neurology GA UL418 UT WOS:A1996UL41800004 PM 8642061 ER PT J AU Karle, IL Flippen-Anderson, JL Uma, K Balaram, P AF Karle, Isabella L. Flippen-Anderson, Judith L. Uma, Kuchibhotla Balaram, Padmanabhan TI Effects of End Group and Aggregation on Helix Conformation: Crystal Structure of Ac-(Aib-Val-Ala-Leu)(2)-Aib-OMe SO JOURNAL OF PEPTIDE SCIENCE LA English DT Article DE all parallel helix assemblies; helix transition; 3(10)/alpha-helices; two conformers; water associated with non-polar helices; X-ray crystallography AB The role of end groups in determining stereochemistry and packing in hydrophobic helical peptides has been Investigated using an alpha-aminosobutyric acid (Alb) containing model nonapeptide sequence. In contrast to the Boc-analogue, Ac-(Aib-Val-Ala-Leu)(2)-Aib-OMe crystallizes with two independent molecules in a triclinic cell. The cell parameters are: space group Pl, a= 10.100(2)angstrom, b= 15.194(4) angstrom, c= 19.948(5) angstrom, alpha = 63.12(2)degrees, beta = 88.03(2)degrees, gamma = 88.61(2), Z=2, R= 7.96% for 5140 data where |F-o| > 3 sigma-(F). The two independent molecules alternate in infinite columns formed by head-to-tail hydrogen bonding. The helices in the two independent molecules are quite similar to each other but one molecule is rotated similar to 123 degrees about its helix axis with respect to the other. All the helical columns pack parallel to each other in the crystal. Replacement of the bulky Boc group does not lead to any major changes in conformation. Packing characteristics are also similar to those observed for similar helical peptides. C1 [Karle, Isabella L.; Flippen-Anderson, Judith L.] Naval Res Lab, Struct Matter Lab, Washington, DC 20375 USA. [Uma, Kuchibhotla; Balaram, Padmanabhan] Indian Inst Sci, Mol Biophys Unit, Bangalore 560012, Karnataka, India. RP Karle, IL (reprint author), Naval Res Lab, Struct Matter Lab, Washington, DC 20375 USA. FU Department of Science and Technology, India; National Institute of Health [GM30902]; Office of Naval Research FX This research was supported in part by a grant from the Department of Science and Technology, India and by the National Institute of Health Grant GM30902 and the Office of Naval Research. NR 21 TC 4 Z9 4 U1 0 U2 1 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 1075-2617 EI 1099-1387 J9 J PEPT SCI JI J. Pept. Sci. PD MAR PY 1996 VL 2 IS 2 BP 106 EP 116 DI 10.1002/psc.52 PG 11 WC Biochemistry & Molecular Biology; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA V33NB UT WOS:000209024400003 PM 9225250 ER PT J AU Anuta, MA Lozier, DW Turner, PR AF Anuta, MA Lozier, DW Turner, PR TI The MasPar MP-1 as a computer arithmetic laboratory SO JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY LA English DT Article DE computer arithmetic; fixed-point and floating-point arithmetic; logarithmic and level-index arithmetic; residue number system arithmetic; serial and parallel simulation of computer arithmetic ID RESIDUE NUMBER SYSTEM; FLOATING-POINT; DIVISION ALGORITHM; PRECISION; REPRESENTATION; COMPUTATION AB This paper is a blueprint for the use of a massively parallel SIMD computer architecture for the simulation of various forms of computer arithmetic. The particular system used is a DEC/MasPar MP-1 with 4096 processors in a square array. This architecture has many advantages for such simulations due largely to the simplicity of the individual processors. Arithmetic operations can be spread across the processor array to simulate a hardware chip. Alternatively they may be performed on individual processors to allow simulation of a massively parallel implementation of the arithmetic. Compromises between these extremes permit speed-area tradeoffs to be examined. The paper includes a description of the architecture and its features. It then summarizes some of the arithmetic systems which have been, or are to be, implemented. The implementation of the level-index and symmetric level-index, LI and SLI, systems is described in some detail. An extensive bibliography is included. C1 NIST, GAITHERSBURG, MD 20899 USA. USN ACAD, ANNAPOLIS, MD 21402 USA. RP Anuta, MA (reprint author), CRAY RES INC, CALVERTON, MD 20705 USA. NR 85 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPERINTENDENT DOCUMENTS,, WASHINGTON, DC 20402-9325 USA SN 1044-677X J9 J RES NATL INST STAN JI J. Res. Natl. Inst. Stand. Technol. PD MAR-APR PY 1996 VL 101 IS 2 BP 165 EP 174 DI 10.6028/jres.101.018 PG 10 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA UN553 UT WOS:A1996UN55300005 PM 27805123 ER PT J AU Catalano, G Morejon, M Alberts, VA Catalano, MC AF Catalano, G Morejon, M Alberts, VA Catalano, MC TI Report of a case of male genital self-mutilation and review of the literature, with special emphasis on the effects of the media SO JOURNAL OF SEX & MARITAL THERAPY LA English DT Article ID PERSONALITY-DISORDER; TELEVISION MOVIES; SUICIDE; AMPUTATION; IMPACT; CASTRATION; IMITATION; BEHAVIOR; PENIS AB Genital self-mutilation is seldom reported; fewer than 100 cases have been reported in the literature to date, Feu studies have examined the factors that may lead susceptible individuals to undertake this act. We report here on a case of genital self-mutilation by a 22-year-old man who cut off his penis with an electric chain saw. This patient, who also demonstrated borderline intellectual functioning as evidenced by psychological testing, was likely influenced by the popular media, which was showcasing the criminal trials of John and Lorena Bobbitt at the time of the patient's act. C1 UNIV S FLORIDA,COLL MED,DEPT PSYCHIAT & BEHAV MED,TAMPA,FL. USN,MED CTR,SAN DIEGO,CA 92152. JAMES A HALEY VET HOSP,PSYCHIAT SERV,TAMPA,FL 33612. NR 40 TC 19 Z9 19 U1 0 U2 0 PU BRUNNER/MAZEL INC PI NEW YORK PA 19 UNION SQUARE WEST, NEW YORK, NY 10003 SN 0092-623X J9 J SEX MARITAL THER JI J. Sex Marital Ther. PD SPR PY 1996 VL 22 IS 1 BP 35 EP 46 PG 12 WC Psychology, Clinical; Family Studies SC Psychology; Family Studies GA UA690 UT WOS:A1996UA69000005 PM 8699496 ER PT J AU Frison, TW Abarbanel, HDI Cembrola, J Neales, B AF Frison, TW Abarbanel, HDI Cembrola, J Neales, B TI Chaos in ocean ambient ''noise'' SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID STRANGE ATTRACTORS; TIME-SERIES; EXPONENTS AB Using a data analysis toolkit designed to explore data from nonlinear systems using time domain methods, it has been determined that the observed number of degrees of freedom in one pristine measurement of ocean ambient background pressure fluctuations or ''noise'' is nine. While the true number of degrees of freedom in the ocean is probably large, the observed measurements have nine degrees of freedom. There is a positive Lyapunov exponent, which identifies the system as being chaotic. The largest exponent is very large, indicating that the prediction horizon for these data is confined to a few samples. Determination of the degrees of freedom is important for the construction of physical models and nonlinear noise reduction filters, which may be based on characteristics of the observed few degrees of freedom from the background acoustic source. The magnitude of the largest Lyapunov exponent provides a measure of confidence for signal state prediction and mitigation. (C) 1996 Acoustical Society of America. C1 UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,DEPT PHYS,INST NONLINEAR SCI,SAN DIEGO,CA 92093. UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,MARINE PHYS LAB,INST NONLINEAR SCI,SAN DIEGO,CA 92093. USN,UNDERSEA WARFARE CTR,NEWPORT,RI 02841. RP Frison, TW (reprint author), RANDLE INC,POB 587,GREAT FALLS,VA 22066, USA. NR 24 TC 21 Z9 31 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD MAR PY 1996 VL 99 IS 3 BP 1527 EP 1539 DI 10.1121/1.414730 PG 13 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA UA036 UT WOS:A1996UA03600026 ER PT J AU Smith, KJ Skelton, HG Barrett, TL Welch, M Beard, J AF Smith, KJ Skelton, HG Barrett, TL Welch, M Beard, J TI Histologic and immunohistochemical features in biopsy sites in which bovine collagen matrix was used for hemostasis SO JOURNAL OF THE AMERICAN ACADEMY OF DERMATOLOGY LA English DT Article ID INJECTABLE COLLAGEN; CELL-ADHESION; SPONGE; SKIN AB Background: Bovine collagen matrix (Helistat and Helatene), which is used primarily for hemostasis, decreases wound contracture in skin biopsy sites and promotes wound granulation. Objective: Our purpose was to evaluate excision specimens of previous biopsy sites to determine whether there are histologic differences between cases in which bovine collagen matrix was used for hemostasis and those in which it was not used. Methods: Thirty-two diagnostic punch biopsies were done with hemostasis obtained with bovine collagen matrix in 24 biopsies and by pressure alone in eight, The biopsy sites were reexcised at various time intervals, and the histologic and immunohistochemical features were evaluated and compared. Results: In specimens in which collagen matrix was used, migration of stromal and epithelial cells along the bovine collagen matrix was evident by 2 days and had progressed rapidly by 4 days. Around and within the matrix hyaluronic acid increased during the first 8 to 10 days. Initially stromal cells stained with CD34 and reticulum fibers were present at 8 to 10 days. At 12 to 15 days, factor XIIIa(+) stromal cells were present within the matrix, and host collagen fibers were present and well-oriented within the degenerating matrix. Biopsy specimens allowed to heal without the matrix showed a delayed and an uneven increase in hyaluronic acid. Furthermore, the granulation tissue within the dermis showed no organization with a persistent acute inflammatory infiltrate and increased muscle actin-positive stromal cells as scar formation proceeded. Conclusion: Bovine collagen products appear to provide a matrix that promotes thrombosis, The collagen matrix also promotes migration and attachment of stromal and epithelial cells, thereby organizing and accelerating wound healing. C1 ARMED FORCES INST PATHOL,DEPT DERMATOPATHOL,WASHINGTON,DC 20306. WALTER REED ARMY MED CTR,WALTER REED ARMY INST RES,WASHINGTON,DC 20307. WALTER REED ARMY MED CTR,DERMATOL SERV,WASHINGTON,DC 20307. USN HOSP,SAN DIEGO,CA. NR 21 TC 15 Z9 17 U1 0 U2 1 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0190-9622 J9 J AM ACAD DERMATOL JI J. Am. Acad. Dermatol. PD MAR PY 1996 VL 34 IS 3 BP 434 EP 438 DI 10.1016/S0190-9622(96)90435-1 PG 5 WC Dermatology SC Dermatology GA TZ292 UT WOS:A1996TZ29200006 PM 8609255 ER PT J AU Wu, CCM Kahn, M Moy, W AF Wu, CCM Kahn, M Moy, W TI Piezoelectric ceramics with functional gradients: A new application in material design SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID ACTUATORS AB Internal strain amplification can be utilized in piezoelectric ceramics to obtain relatively large displacements. The monomorph described in the present work is a bending bar made from a single piece of material into which a smooth gradient of piezoelectric activity is introduced. The application of a voltage then causes the bar to bend due to the differential stresses that are induced. These are relatively uniformly distributed and do not peak in the center as in a conventional bimorph, Significantly increased life and reliability can then be achieved. RP Wu, CCM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 5 TC 232 Z9 248 U1 2 U2 24 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAR PY 1996 VL 79 IS 3 BP 809 EP 812 PG 4 WC Materials Science, Ceramics SC Materials Science GA UB624 UT WOS:A1996UB62400039 ER PT J AU Viudez, A Tintore, J Haney, RL AF Viudez, A Tintore, J Haney, RL TI About the nature of the generalized omega equation SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID VERTICAL MOTION; Q-VECTOR; DIAGNOSIS; CYCLONE AB The generalized omega equation (omega equation) for hydrostatic, inviscid, isentropic, Boussinesq flow is interpreted in terms of the change of differential relative vorticity in a fluid parcel. A new formulation of the omega equation, consistent with this interpretation, is introduced. The formulation can be interpreted as the primitive equation (PE) counterpart of the Q vector formulation of the quasigeostrophic (QG) omega equation. This interpretation is equivalent to the interpretation of the differential horizontal divergence [(-w(z))(z)] equation as the PE counterpart of the QG differential vorticity equation. The generalized equations also show the role that the rate of change of differential ageostrophic vorticity and differential divergence play in forcing nonquasigeostrophic vertical velocity and nonquasigeostrophic vorticity, respectively. This is illustrated by a simple application of the theory for the circulation in a tropical cyclone. Finally, the necessary and sufficient conditions required to obtain the corresponding QG expressions are specified from the generalized equations. C1 UNIV ILLES BALEARS,DEPT FIS,E-07071 PALMA DE MALLORCA,SPAIN. RP Viudez, A (reprint author), USN,POSTGRAD SCH,DEPT METEOROL,ROOM 253,589 DYER RD,MONTEREY,CA 93943, USA. RI Viudez, Alvaro/A-8201-2008 OI Viudez, Alvaro/0000-0001-7862-9835 NR 18 TC 17 Z9 17 U1 0 U2 2 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0022-4928 J9 J ATMOS SCI JI J. Atmos. Sci. PD MAR 1 PY 1996 VL 53 IS 5 BP 787 EP 795 DI 10.1175/1520-0469(1996)053<0787:ATNOTG>2.0.CO;2 PG 9 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA TZ888 UT WOS:A1996TZ88800009 ER PT J AU Swider, KE Rolison, DR AF Swider, KE Rolison, DR TI The chemical state of sulfur in carbon-supported fuel-cell electrodes SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID CATALYSTS; PLATINUM; POISONS AB Vulcan carbon is the favored support for fuel-cell electrocatalysts, but as-received it contains high levels of sulfur (ca. 5000 ppm or greater) which could potentially poison the fuel-cell electrochemistry. The chemical state of the sulfur in platinum/carbon electrocatalysts has been examined by measuring its oxidation state via x-ray photoelectron spectroscopy at different points during the preparation of a ''mock'' fuel-cell electrode. Also monitored were the presence of sulfate in the aqueous wash from the electrocatalysts and the cyclic voltammetry of the electrocatalysts after each preparation step. Our studies indicate that the platinum catalytically oxidizes some of the covalent sulfur in the vulcan carbon to sulfate when water, heat, and strong physical contact between Pt and C are all present. These conditions are attained during the preparation of typical fuel-cell electrodes. Most of the zero-valent sulfur remains in the carbon after treatment, however, and appears not to be initially in contact with the Pt. This remaining unoxidized sulfur mag be a source of poisoning to the Pt electrocatalyst with long-term electrochemical use, particularly at the fuel-cell cathode. RP Swider, KE (reprint author), USN,RES LAB,SURFACE CHEM BRANCH,WASHINGTON,DC 20375, USA. NR 18 TC 43 Z9 45 U1 3 U2 9 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD MAR PY 1996 VL 143 IS 3 BP 813 EP 819 DI 10.1149/1.1836542 PG 7 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA UC203 UT WOS:A1996UC20300015 ER PT J AU Huston, AL Lin, HB Eversole, JD Campillo, AJ AF Huston, AL Lin, HB Eversole, JD Campillo, AJ TI Effect of bubble formation on microdroplet cavity quality factors SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID STIMULATED RAMAN-SCATTERING; MORPHOLOGY-DEPENDENT RESONANCES; INHIBITED SPONTANEOUS EMISSION; PARTIAL-WAVE RESONANCES; MIE SCATTERING; DIELECTRIC MICROSPHERES; OPTICAL CAVITIES; LIQUID DROPLETS; LIGHT; LASER AB Optical cavity quality factors (Q's) of ethanol microdroplets with internal bubbles were estimated from cavity mode emission efficiencies as a function of the dissolved gas content. Droplets were generated with a vibrating orifice aerosol generator driven by pressurized gas. With helium- or nitrogen-gas pressurization, Q's were similar to 2 x 10(8), a value expected to be near a practical upper limit for this size of cavity. Surface capillary waves with a rms amplitude of 1.4 mn are conjectured to limit Q values under these conditions. However, two regimes dominated by bubbles were observed when carbon dioxide-gas pressurization was used. In one regime, nominal 10.25-mu m-radius hollow droplets, consisting of a concentric outer ethanol layer surrounding a 7.75-mu m-radius gaseous central core, were formed when the vibrating orifice frequency was tuned to;a particular value. These hollow sphere droplets displayed a higher Q of 4 x 10(8), a value that is consistent with the increase in outer radius. In the second regime, at higher vibrating orifice frequencies, smaller submicrometer-sized bubbles, leading to nonnegligible internal elastic scattering losses and reducing the highest observable Q values to as low as 3 x 10(5). Sound waves associated with the vibrating orifice must also contribute to the bubble formation because these effects were frequency dependent. (C) 1996 Optical Society of America RP Huston, AL (reprint author), USN,RES LAB,CODE 5610,WASHINGTON,DC 20375, USA. NR 58 TC 19 Z9 19 U1 1 U2 5 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD MAR PY 1996 VL 13 IS 3 BP 521 EP 531 DI 10.1364/JOSAB.13.000521 PG 11 WC Optics SC Optics GA TW765 UT WOS:A1996TW76500005 ER PT J AU Starkweather, HW Avakian, P Fontanella, JJ Wintersgill, MC AF Starkweather, HW Avakian, P Fontanella, JJ Wintersgill, MC TI Dielectric properties of polymers based on hexafluoropropylene SO JOURNAL OF THERMAL ANALYSIS LA English DT Article DE copolymers of methyl vinyl ether; dielectric properties; elastomeric fluoropolymers; hexafluoropropylene; perfluoro methyl vinyl ether; polyhexafluoropropylene; relaxations; tetrafluoroethylene/hexafluoropropylene copolymers AB Dielectric measurements have been made at Frequencies from 10 Hz to 100 kHz and temperatures from 4 K to at least 300 K on a number of polymers containing units of hexafluoropropylene (HFP). These included copolymers of tetrafluoroethylene (TFE) and HFP, the homopolymer of HFP, elastomeric copolymers of HFP and vinylidene fluoride, and alternating copolymers of methyl vinyl ether with TFE and HFP. The effect of an ether linkage between the CF3 group and the chain was also considered. Most of these polymers exhibited a main chain local mode relaxation near 228 K and a side group relaxation near 93 K. C1 USN ACAD,DEPT PHYS,ANNAPOLIS,MD 21402. RP Starkweather, HW (reprint author), DUPONT CO INC,CENT RES & DEV,EXPTL STN,WILMINGTON,DE 19880, USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0368-4466 J9 J THERM ANAL JI J. Therm. Anal. PD MAR-APR PY 1996 VL 46 IS 3-4 BP 785 EP 794 DI 10.1007/BF01983602 PG 10 WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical SC Thermodynamics; Chemistry GA UL067 UT WOS:A1996UL06700008 ER PT J AU Lau, SF Sosnowik, AJ Choi, LS Callahan, JH Kim, OK AF Lau, SF Sosnowik, AJ Choi, LS Callahan, JH Kim, OK TI Thermal properties of a molecule in a constrained state - Dye-amylose inclusion complex SO JOURNAL OF THERMAL ANALYSIS LA English DT Article DE chemical ionization MS; constrained dye; DSC; dye-amylose inclusion complex; Tandem MS; TGA; Thermal Desorption MS ID PHOTOCHEMICAL-REACTIONS; ORGANIZED ASSEMBLIES; CYCLODEXTRIN AB The thermal properties of a dye molecule (guest) inside the cavity of a host amylose helix were studied by TGA, DSC, and Thermal Desorption MS. The results show that the degradation temperature of dye shifts to a higher temperature by approximately 20 degrees C. C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. RP Lau, SF (reprint author), HERCULES INC,RES CTR,WILMINGTON,DE 19808, USA. NR 19 TC 4 Z9 4 U1 0 U2 2 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0368-4466 J9 J THERM ANAL JI J. Therm. Anal. PD MAR-APR PY 1996 VL 46 IS 3-4 BP 1081 EP 1092 DI 10.1007/BF01983622 PG 12 WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical SC Thermodynamics; Chemistry GA UL067 UT WOS:A1996UL06700028 ER PT J AU Wax, JR Burroughs, R Wright, MS AF Wax, JR Burroughs, R Wright, MS TI Prenatal sonographic features of Russell-Silver syndrome SO JOURNAL OF ULTRASOUND IN MEDICINE LA English DT Article C1 USN,MED CTR,DEPT PEDIAT,DIV NEONATOL,PORTSMOUTH,VA 23708. RP Wax, JR (reprint author), USN,MED CTR,DEPT OBSTET & GYNECOL,DIV MATERNAL FETAL MED,PORTSMOUTH,VA 23708, USA. NR 15 TC 2 Z9 2 U1 0 U2 0 PU AMER INST ULTRASOUND MEDICINE PI LAUREL PA SUBSCRIPTION DEPT, 14750 SWEITZER LANE, STE 100, LAUREL, MD 20707-5906 SN 0278-4297 J9 J ULTRAS MED JI J. Ultrasound Med. PD MAR PY 1996 VL 15 IS 3 BP 253 EP 255 PG 3 WC Acoustics; Radiology, Nuclear Medicine & Medical Imaging SC Acoustics; Radiology, Nuclear Medicine & Medical Imaging GA TX207 UT WOS:A1996TX20700012 PM 8919509 ER PT J AU Baselt, DR Lee, GU Colton, RJ AF Baselt, DR Lee, GU Colton, RJ TI Biosensor based on force microscope technology SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 8th International Conference on Scanning Tunneling Microscopy and Related Methods (STM 95) CY JUL 25-29, 1995 CL SNOWMASS, CO SP Amer Vacuum Soc, AVS Nanometerscale Sci & Technol Div, Naval Res Lab, USN, Off Naval Res, USA Res Off, Natl Sci Fdn ID SENSITIVITY; ASSAY; ELISA AB We are developing a sensor capable of detecting biological species such as cells, proteins, toxins, and DNA at concentrations as low as 10(-18) M. The force amplified biological sensor will take advantage of the high sensitivity of force microscope cantilevers to detect the presence of as little as one superparamagnetic particle bound to a cantilever by a sandwich immunoassay technique. The device, which will ultimately be small enough for hand-held use, will perform an assay in about 10 min. Lock-in detection and use of a reference cantilever will provide a high degree of vibration immunity. An array of ten or more cantilevers will provide greater sensitivity and the capability to detect multiple species simultaneously. The force amplified biological sensor also offers the potential of distinguishing and studying chemical species via its ability to measure binding forces. (C) 1996 American Vacuum Society. RP Baselt, DR (reprint author), USN,RES LAB,CODE 6177,WASHINGTON,DC 20375, USA. RI Lee, Gil/P-8696-2016 OI Lee, Gil/0000-0002-7949-5848 NR 10 TC 112 Z9 114 U1 1 U2 10 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD MAR-APR PY 1996 VL 14 IS 2 BP 789 EP 793 DI 10.1116/1.588714 PG 5 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA UH890 UT WOS:A1996UH89000035 ER PT J AU Baski, AA Whitman, LJ AF Baski, AA Whitman, LJ TI Ga-induced restructuring of Si(112) and Si(337) SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 8th International Conference on Scanning Tunneling Microscopy and Related Methods (STM 95) CY JUL 25-29, 1995 CL SNOWMASS, CO SP Amer Vacuum Soc, AVS Nanometerscale Sci & Technol Div, Naval Res Lab, USN, Off Naval Res, USA Res Off, Natl Sci Fdn ID EPITAXY; GROWTH AB The adsorption of gallium on Si(112) and Si(337) has been studied with scanning tunneling microscopy. When clean, these two high-index surfaces are unstable and facet to other orientations: (112) to (111)- and (337)-like nanofacets, and (337) to the stable (5512) plane. When Ga is adsorbed onto each of these surfaces and annealed, the top surface layers undergo substantial rearrangements, exposing Ga-reconstructed (112) planes in both cases. (C) 1996 American Vacuum Society. RP Baski, AA (reprint author), USN,RES LAB,CODE 6177,WASHINGTON,DC 20375, USA. RI Whitman, Lloyd/G-9320-2011; OI Whitman, Lloyd/0000-0002-3117-1174; Baski, Alison/0000-0002-8985-8067 NR 11 TC 25 Z9 26 U1 0 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD MAR-APR PY 1996 VL 14 IS 2 BP 992 EP 994 DI 10.1116/1.589191 PG 3 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA UH890 UT WOS:A1996UH89000081 ER PT J AU Marsh, SP Glicksman, ME AF Marsh, SP Glicksman, ME TI Overview of geometric effects on coarsening of mushy zones SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT Symposium on Analysis and Modeling of Solidification CY OCT 02-06, 1994 CL ROSEMONT, IL SP TMS Solidification Comm ID EVOLUTION; ALLOYS AB An overview is presented of the thermodynamic, kinetic, statistical, and geometric factors that govern phase coarsening in dendritic mushy zones. The coarsening behavior of such systems is best quantified through the kinetics of the decay rate of the specific surface area, S-v. The geometry of the complex solid-melt interfaces comprising a mushy zone is described statistically as an areal distribution of local curvature parameters. These parameters capture both the intensive and extensive thermodynamic characteristics of the mushy zone. The effects of local interface shape, negative mean, and Gaussian curvatures and the appearance of inactive lengthscales on the coarsening kinetics of dendritic structures are discussed. The combined contribution of all these geometrical effects yields global coarsening rates for ramified mushy zones that are comparable to those predicted from theory for a collection of spherical particles having the identical volume fraction of solid. C1 RENSSELAER POLYTECH INST,DEPT MAT SCI & ENGN,TROY,NY 12180. RP Marsh, SP (reprint author), USN,RES LAB,PHYS MET BRANCH,WASHINGTON,DC 20375, USA. OI Glicksman, Martin/0000-0002-2675-2759 NR 32 TC 56 Z9 57 U1 2 U2 12 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD MAR PY 1996 VL 27 IS 3 BP 557 EP 567 DI 10.1007/BF02648946 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA UC668 UT WOS:A1996UC66800005 ER PT J AU Last, HR Garrett, RK AF Last, HR Garrett, RK TI Mechanical behavior and properties of mechanically alloyed aluminum alloys SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article AB The fracture and deformation behaviors of several product forms produced from mechanically alloyed (MA) aluminum alloys 9052 and 905XL were studied. The main operative strengthening mechanism is strengthening due to the submicron grain size. Ductility and toughness were found to be controlled by the morphology of the prior particle boundaries. We propose that the work-hardening behavior of these MA alloys is similar to the behavior exhibited by a deformed fee alloy that (a) contains rigid barriers to dislocation motion, (b) deforms by wavy slip, and (c) forms a cell substructure upon deformation. RP Last, HR (reprint author), USN,CTR SURFACE WARFARE,DIV INDIAN HEAD,SILVER SPRING,MD 20903, USA. NR 22 TC 33 Z9 34 U1 0 U2 4 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD MAR PY 1996 VL 27 IS 3 BP 737 EP 745 DI 10.1007/BF02648961 PG 9 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA UC668 UT WOS:A1996UC66800020 ER PT J AU JASON, PK AF JASON, PK TI THE NOISE IS ALWAYS IN MY HEAD, AUDITORY IMAGES IN THE LITERATURE OF THE VIETNAM-WAR SO MIDWEST QUARTERLY-A JOURNAL OF CONTEMPORARY THOUGHT LA English DT Article RP JASON, PK (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 23 TC 0 Z9 0 U1 0 U2 0 PU PITTSBURG STATE UNIV PI PITTSBURG PA MIDWEST QUARTERLY, PITTSBURG, KS 66762 SN 0026-3451 J9 MIDWEST QUART JI Midwest Q.-J. Contemp. Thought PD SPR PY 1996 VL 37 IS 3 BP 243 EP 255 PG 13 WC Literary Theory & Criticism SC Literature GA UF286 UT WOS:A1996UF28600001 ER PT J AU Amundson, DE Mancini, SA AF Amundson, DE Mancini, SA TI Pseudomonas aeruginosa Pneumonia Sepsis as an initial opportunistic infection in an HIV patient SO MILITARY MEDICINE LA English DT Article C1 USN,MED CTR,DEPT CRIT CARE,SAN DIEGO,CA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0026-4075 J9 MIL MED JI Milit. Med. PD MAR PY 1996 VL 161 IS 3 BP 179 EP 179 PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA UA236 UT WOS:A1996UA23600015 PM 8637652 ER PT J AU Holden, RA Thomas, RW AF Holden, RA Thomas, RW TI Big system physics applied to a combat suite SO NAVAL ENGINEERS JOURNAL LA English DT Article AB The combat suite is usually described by identifying the physical characteristics of its individual parts. The suite has dynamic characteristics that derive from the functions performed by the computers used for control and automation. A description is needed that considers the real time collective behavior of the sum of the parts. This paper reports a strategy that can be used to examine the fundamental characteristics of the surface ship combat suite as a whole. The combat suite is shown to conform to basic concepts of physics and lends itself to theoretical and experimental study. The theoretical approach relies on the dynamic character of the computer resources; processing time, input/output, and memory. The experimental approach uses a land based test facility to measure the response of the real system to simulator inputs. Measurements involve the collection of time ordered computer processing events and intercomputer messages. Multi-tier combat system models are suggested to facilitate interpretation of data. RP Holden, RA (reprint author), USN,CTR SURFACE WARFARE,DAHLGREN DIV,DAHLGREN,VA 22448, USA. NR 2 TC 1 Z9 1 U1 0 U2 0 PU AMER SOC NAVAL ENG INC PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314-3458 SN 0028-1425 J9 NAV ENG J JI Nav. Eng. J. PD MAR PY 1996 VL 108 IS 2 BP 17 EP 27 PG 11 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA UW755 UT WOS:A1996UW75500002 ER PT J AU Albor, N Herr, J Mastrogiovanni, S Mulderrig, F Nucci, L Price, A Remner, D DiTaranto, JR AF Albor, N Herr, J Mastrogiovanni, S Mulderrig, F Nucci, L Price, A Remner, D DiTaranto, JR TI Comparison of fiber optic and conventional sensors for naval applications SO NAVAL ENGINEERS JOURNAL LA English DT Article AB Over the past three years the Carderock Division of the Naval Surface Warfare Center (CDNSWC), under the auspices of the Naval Sea Systems Command (NAVSEA), has investigated the possibility of replacing conventional Hull, Mechanical and Electrical (HM&E) sensors with their fiber optic counterpart. The goal of the Navy in this effort is to provide the shipbuilder with specifications for fiber optic sensors that, as a minimum, meet the current performance level of conventional sensors and decrease life cycle costs. The approach of this effort has been to investigate commercially available sensors and write specifications that incorporate the Navy's needs and industry's capabilities. In order to accomplish this task, a comparison of conventional versus fiber optic sensors was conducted. This paper describes the work performed as well as the anticipated future of fiber optic technology in each of the sensing areas. RP Albor, N (reprint author), USN,CTR SURFACE WARFARE,CARDEROCK DIV,PHILADELPHIA,PA, USA. NR 6 TC 0 Z9 0 U1 0 U2 1 PU AMER SOC NAVAL ENG INC PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314-3458 SN 0028-1425 J9 NAV ENG J JI Nav. Eng. J. PD MAR PY 1996 VL 108 IS 2 BP 29 EP 42 PG 14 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA UW755 UT WOS:A1996UW75500003 ER PT J AU Raley, GC Lewellyn, AH AF Raley, GC Lewellyn, AH TI PHALANX Integrated Maintenance System - The future in electronic maintenance today SO NAVAL ENGINEERS JOURNAL LA English DT Article AB The primary goal of PIMS is to improve the PHALANX Weapon System's availability and to reduce mean time to repair. PIMS accomplishes this by integrating ail maintenance activities into a seamless maintenance environment. PIMS combines the Integrated Diagnostic System, automated preventative maintenance procedures, electronic technical manual, and supply support database information in a Windows environment. In doing so, access to all maintenance documentation has been improved along with the integrity of the information contained in the manuals. PIMS also provides the technician another new and unique option in performing maintenance. By providing a ruggedized, portable computer, mobile access to all PIMS functions is now possible above deck at the weapon system. PIMS accomplishes the Navy's initiative for a paperless ship and in doing so helps to reduce the weight on board. PIMS also reduces the cost of providing documentation for an installation and reduces the time needed to incorporate a change to the technical manuals. Once PIMS is installed, all these benefits will be evident and will lead to an immediate reduction in maintenance time. RP Raley, GC (reprint author), USN,CTR SURFACE WARFARE,CRANE DIV,INTEGRATED SHIP DEF DIRECTORATE,COMP RESOURCE BRANCH,LOUISVILLE,KY, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC NAVAL ENG INC PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314-3458 SN 0028-1425 J9 NAV ENG J JI Nav. Eng. J. PD MAR PY 1996 VL 108 IS 2 BP 65 EP 67 PG 3 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA UW755 UT WOS:A1996UW75500006 ER PT J AU Rosenthal, RE Walsh, WJ AF Rosenthal, RE Walsh, WJ TI Optimizing flight operations for an aircraft carrier in transit SO OPERATIONS RESEARCH LA English DT Article AB Suppose that an aircraft carrier is in transit to an assigned position within strike range of a designated target, and is required to be there at a specified time. The carrier may use aircraft assets for defense against threats that may be encountered en route, but doing so will encumber the carrier's progress toward the required objective. We present a highly detailed integer programming model for scheduling aircraft launches and recoveries,to achieve an optimal balance between the conflicting needs of self-protection and on-time arrival. C1 SABRE DECIS TECHNOL,DALLAS FT WORTH AIRP,TX. RP Rosenthal, RE (reprint author), USN,POSTGRAD SCH,MONTEREY,CA, USA. NR 2 TC 2 Z9 2 U1 0 U2 1 PU OPERATIONS RES SOC AMER PI BALTIMORE PA 1314 GUILFORD AVENUE BUSINESS OFFICE, BALTIMORE, MD 21202 SN 0030-364X J9 OPER RES JI Oper. Res. PD MAR-APR PY 1996 VL 44 IS 2 BP 305 EP 312 DI 10.1287/opre.44.2.305 PG 8 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA VW838 UT WOS:A1996VW83800021 ER PT J AU Pieper, RJ Cooper, AW Pelegris, G AF Pieper, RJ Cooper, AW Pelegris, G TI Passive range estimation using dual-baseline triangulation SO OPTICAL ENGINEERING LA English DT Article DE sensor fusion; passive sensors; triangulation AB Modern combat systems based on active radar sensing suffer disadvantages against low-flying targets in cluttered backgrounds. Use of passive infrared sensors with these systems, either in cooperation or as an alternative, shows potential for improving target detection and declaration range for targets crossing the horizon. Realization of this potential requires fusion of target position data from dissimilar sensors, or passive sensor measurement of target range. The availability of passive sensors that can supply both range and bearing data on such targets would significantly extend the robustness of an integrated ship self-defense system. We consider a new method of range determination with passive sensors based on the principle of triangulation, extending the principle to two orthogonal baselines. The performance of single or double baseline triangulation depends on sensor bearing precision and direction to target, An expression for maximum triangulation range at a required accuracy is derived as a function of polar angle relative to the center of the dual-baseline system. Limitations in the dual-baseline model due to the geometrically assessed horizon are also considered. (C) 1996 Society of Photo-Optical Instrumentation Engineers. C1 USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93943. RP Pieper, RJ (reprint author), USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943, USA. NR 22 TC 4 Z9 4 U1 1 U2 2 PU SOC PHOTO-OPT INSTRUM ENG PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD MAR PY 1996 VL 35 IS 3 BP 685 EP 692 DI 10.1117/1.600660 PG 8 WC Optics SC Optics GA UA470 UT WOS:A1996UA47000010 ER PT J AU Cueva, RA Robbins, KT Martin, PJ AF Cueva, RA Robbins, KT Martin, PJ TI Lower cervical cutaneous sensory nerves: An alternative for facial nerve cable grafting SO OTOLARYNGOLOGY-HEAD AND NECK SURGERY LA English DT Article C1 UNIV CALIF SAN DIEGO,SCH MED,SAN DIEGO,CA 92103. UNIV TENNESSEE,SCH MED,DEPT HEAD & NECK SURG,MEMPHIS,TN. USN,BALBOA HOSP,DEPT HEAD & NECK SURG,MEMPHIS,TN. RP Cueva, RA (reprint author), SO CALIF PERMANENTE MED GRP,DEPT HEAD & NECK SURG,4647 ZION AVE,SAN DIEGO,CA 92120, USA. NR 7 TC 3 Z9 6 U1 0 U2 0 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0194-5998 J9 OTOLARYNG HEAD NECK JI Otolaryngol. Head Neck Surg. PD MAR PY 1996 VL 114 IS 3 BP 479 EP 481 DI 10.1016/S0194-5998(96)70223-1 PG 3 WC Otorhinolaryngology; Surgery SC Otorhinolaryngology; Surgery GA UB288 UT WOS:A1996UB28800022 PM 8649887 ER PT J AU Feldman, JL Singh, DJ AF Feldman, JL Singh, DJ TI Lattice dynamics of skutterudites: First-principles and model calculations for CoSb3 SO PHYSICAL REVIEW B LA English DT Article ID SPECTRA; COAS3; COP3 AB The lattice dynamics of skutterudite structure CoSb3 are investigated by local-density frozen phonon calculations and force-constant model fits to both the results of these calculations and experimental frequencies. First-principles calculations of the normal modes and frequencies are reported for the Gamma-point A(g) Raman and A(u) phonons, as well as the constrained bulk modulus and its pressure derivatives. Cubic anharmonic terms are reported for the A(g) modes. Comparison of the results with an existing bond-stretching force-constant model reveals poor agreement for the lowest frequency A(u) phonon, whose displacement pattern is dominated by bond angle modulation with only small bond length changes. This lack of agreement is probably related to the highly covalent bonding of the material and the absence of bond angle force constants in the model. Improved force-constant models, which include bond angle forces and reproduce both the first-principles and experimental phonon frequencies, were developed. Phonon-dispersion curves and densities of states are reported along with elastic constants and the Debye temperature. RP Feldman, JL (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. RI Singh, David/I-2416-2012 NR 18 TC 94 Z9 94 U1 2 U2 17 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 1 PY 1996 VL 53 IS 10 BP 6273 EP 6282 DI 10.1103/PhysRevB.53.6273 PG 10 WC Physics, Condensed Matter SC Physics GA TZ773 UT WOS:A1996TZ77300043 ER PT J AU Lindner, JF Meadows, BK Ditto, WL Inchiosa, ME Bulsara, AR AF Lindner, JF Meadows, BK Ditto, WL Inchiosa, ME Bulsara, AR TI Scaling laws for spatiotemporal synchronization and array enhanced stochastic resonance SO PHYSICAL REVIEW E LA English DT Article AB Recently, the synchronization and signal processing ability of a locally and linearly coupled array of bistable elements was enhanced by the addition of uncorrelated noise [J. F. Lindner, B. K. Meadows, W. L. Ditto, M. E. Inchiosa, and A, R. Bulsara, Phys. Rev. Lett. 75, 3 (1995)]. Here, we detail the performance of such an array as a function of both coupling and noise. Simple theoretical arguments, grounded in extensive numerical studies, suggest how to ''tune'' the array for best synchronization and signal-to-noise ratio. Specifically, we propose that, for large array size N, the optimal coupling scales like N-2 and the optimal noise variance scales like N. This scaling matches the coupling-induced correlation length to the array length and the noise-generated mean hopping time to the modulation period, thereby creating a stochastic resonance in space and time. C1 COLL WOOSTER, WOOSTER, OH 44691 USA. USN COMMAND, CONTROL & OCEAN SURVEILLANCE CTR, RES DEV TEST & EVALUAT DIV, SAN DIEGO, CA 92152 USA. RP Lindner, JF (reprint author), GEORGIA INST TECHNOL, SCH PHYS, APPL CHAOS LAB, ATLANTA, GA 30332 USA. OI Ditto, William/0000-0002-7416-8012 NR 17 TC 122 Z9 123 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD MAR PY 1996 VL 53 IS 3 BP 2081 EP 2086 DI 10.1103/PhysRevE.53.2081 PG 6 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA UA371 UT WOS:A1996UA37100017 ER PT J AU Namenson, A Ott, E Antonsen, TM AF Namenson, A Ott, E Antonsen, TM TI Fractal dimension fluctuations for snapshot attractors of random maps SO PHYSICAL REVIEW E LA English DT Article ID CHAOTIC FLUID-FLOWS; SCALAR GRADIENTS; TRANSITION AB We consider the determination of the information dimension of a fractal snapshot attractor (i.e., the pattern formed by a cloud of orbits at a fixed time) of a random map. It is found that box-counting estimates of the dimension fluctuate from realization to realisation of the random process. These fluctuations about the true dimension value are a result of the unavoidable presence of a finite smallest box size epsilon* used in the dimension estimation. The main result is that the fluctuations are well described by a Gaussian probability distribution function whose width is proportional to (log 1/epsilon*)(-1/2). Averaging dimension estimates over many realizations (or over time for a single realization) thus yields a means of obtaining a greatly improved estimate of the true dimension value. C1 UNIV MARYLAND,DEPT ELECT ENGN,COLLEGE PK,MD 20742. UNIV MARYLAND,DEPT PHYS,COLLEGE PK,MD 20742. UNIV MARYLAND,INST PLASMA RES,COLLEGE PK,MD 20742. UNIV MARYLAND,SYST RES INST,COLLEGE PK,MD 20742. RP Namenson, A (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI O, E/F-1630-2015; Antonsen, Thomas/D-8791-2017 OI Antonsen, Thomas/0000-0002-2362-2430 NR 15 TC 13 Z9 13 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD MAR PY 1996 VL 53 IS 3 BP 2287 EP 2291 DI 10.1103/PhysRevE.53.2287 PG 5 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA UA371 UT WOS:A1996UA37100043 ER PT J AU Inchiosa, ME Bulsara, AR AF Inchiosa, ME Bulsara, AR TI Signal detection statistics of stochastic resonators SO PHYSICAL REVIEW E LA English DT Article ID RESONANCE; SYSTEMS AB We consider the signal detection performance of networks of coupled overdamped nonlinear dynamic elements driven by a weak sinusoidal signal embedded in Gaussian white noise. In the ''stochastic resonance'' operating regime, (1) the detection performance exhibits a maximum reflecting the maximum in the signal-to-noise ratio, and (2) coupling significantly enhances the detection performance over that of a single element. Coupling-induced linearization allows the nonlinear system to approach the performance of the linear system which is optimal for our signal detection problem. RP Inchiosa, ME (reprint author), USN COMMAND, CONTROL & OCEAN SURVEILLANCE CTR, RDT&E DIV, CODE 524, SAN DIEGO, CA 92152 USA. NR 23 TC 84 Z9 85 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD MAR PY 1996 VL 53 IS 3 BP R2021 EP R2024 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA UA371 UT WOS:A1996UA37100002 ER PT J AU Soulen, RJ AF Soulen, RJ TI James Dewar, his flask and other achievements SO PHYSICS TODAY LA English DT Article RP Soulen, RJ (reprint author), USN,RES LAB,SUPERCONDUCTING MAT SECT,WASHINGTON,DC 20375, USA. NR 15 TC 1 Z9 1 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD MAR PY 1996 VL 49 IS 3 BP 32 EP 37 DI 10.1063/1.881490 PG 6 WC Physics, Multidisciplinary SC Physics GA TZ622 UT WOS:A1996TZ62200008 ER PT J AU Bulsara, AR Gammaitoni, L AF Bulsara, AR Gammaitoni, L TI Tuning in to noise SO PHYSICS TODAY LA English DT Article ID STOCHASTIC RESONANCE; BISTABLE SYSTEMS; INFORMATION C1 USN, COMMAND CONTROL & OCEAN SURVEILLANCE CTR, RDT&E DIV, SAN DIEGO, CA 92152 USA. RI Gammaitoni, Luca/B-5375-2009 OI Gammaitoni, Luca/0000-0002-4972-7062 NR 29 TC 400 Z9 410 U1 3 U2 20 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD MAR PY 1996 VL 49 IS 3 BP 39 EP 45 DI 10.1063/1.881491 PG 7 WC Physics, Multidisciplinary SC Physics GA TZ622 UT WOS:A1996TZ62200009 ER PT J AU Murawski, K DeVore, CR Parhi, S Goossens, M AF Murawski, K DeVore, CR Parhi, S Goossens, M TI Numerical simulations of MHD wave excitation in bounded plasma slabs SO PLANETARY AND SPACE SCIENCE LA English DT Article ID FLUX-CORRECTED TRANSPORT; RESONANT ABSORPTION; SOLAR ATMOSPHERE; ALFVEN WAVES; SURFACE-WAVES; SHEAR MOTION; CORONA; TUBES; MAGNETOSPHERE; EVOLUTION AB Numerical simulations are performed in the framework of nonlinear resistive 2.5-dimensional magnetohydrodynamics to investigate the response of a coronal loop to shearing motions of the footpoints. A simple slab plasma with straight magnetic field lines is used to model the coronal loop, with the photospheric ends represented by impermeable walls. The hot, dense loop plasma is approximated by smoothed step-function profiles. The results show that an initially excited Alfven wave reveals a 1/x-type singularity, which is characteristic of the linear Alfven resonances, smoothed by the resistive dissipation. Both fast and slow magnetosonic waves are driven by the nonlinear Alfven wave. The slow magnetosonic waves concentrate their energies in resonance layers, and their associated flows exhibit singularities of the 1/x-type. Alfven resonances, which are absent from the system in the case of linear waves, develop late in time as the Alfven-wave amplitude grows into the nonlinear regime, and their development is accelerated for larger-amplitude driving forces. The resultant heating associated with the resonances and phase mixing of the waves is concentrated in the region of large Alfven-speed gradients. C1 KATHOLIEKE UNIV LEUVEN, CTR PLASMA ASTROPHYS, B-3001 LOUVAIN, BELGIUM. USN, RES LAB, COMPUTAT PHYS & FLUID DYNAM LAB, WASHINGTON, DC 20375 USA. RI DeVore, C/A-6067-2015 OI DeVore, C/0000-0002-4668-591X NR 44 TC 8 Z9 8 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0032-0633 J9 PLANET SPACE SCI JI Planet Space Sci. PD MAR PY 1996 VL 44 IS 3 BP 253 EP 265 DI 10.1016/0032-0633(95)00114-X PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA UB420 UT WOS:A1996UB42000008 ER PT J AU Newton, DA AF Newton, DA TI Chromium NESHAP compliance flowchart SO PLATING AND SURFACE FINISHING LA English DT Article AB Jobshops performing chromium electroplating and/or anodizing are required to comply with the National Emission Standards for Hazardous Air Pollutants (NESHAP). A compliance flowchart developed for the Department of Defense can make it easier for managers to understand and comply with the regulations. RP Newton, DA (reprint author), USN,FACILITIES ENGN SERV CTR,TRISERV HAZARDOUS AIR POLLUTANT SUBCOMM,560 CTR DR,PORT HUENEME,CA 93043, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU AMER ELECTROPLATERS SOC INC PI ORLANDO PA 12644 RESEARCH PKWY, ORLANDO, FL 32826-3298 SN 0360-3164 J9 PLAT SURF FINISH JI Plat. Surf. Finish. PD MAR PY 1996 VL 83 IS 3 BP 32 EP 35 PG 4 WC Metallurgy & Metallurgical Engineering; Materials Science, Coatings & Films SC Metallurgy & Metallurgical Engineering; Materials Science GA TX933 UT WOS:A1996TX93300005 ER PT J AU FRIEDMAN, H AF FRIEDMAN, H TI ADRIFT IN SPACE SO PROCEEDINGS OF THE AMERICAN PHILOSOPHICAL SOCIETY LA English DT Article RP FRIEDMAN, H (reprint author), USN,RES LAB,HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER PHILOSOPHICAL SOC PI PHILADELPHIA PA 104 SOUTH FIFTH ST, PHILADELPHIA, PA 19106-3387 SN 0003-049X J9 P AM PHILOS SOC JI Proc. Amer. Philos. Soc. PD MAR PY 1996 VL 140 IS 1 BP 10 EP 21 PG 12 WC Humanities, Multidisciplinary SC Arts & Humanities - Other Topics GA UC718 UT WOS:A1996UC71800002 ER PT J AU Walters, RJ Summers, GP Messenger, SR Burke, EA AF Walters, RJ Summers, GP Messenger, SR Burke, EA TI Correlation of electron and proton-irradiation induced damage in InP solar cells SO PROGRESS IN PHOTOVOLTAICS LA English DT Article; Proceedings Paper CT 14th Space Photovoltaic Research and Technology Conference (SPRAT XIV) CY OCT 22-26, 1995 CL LEWIS RES CTR, CLEVELAND, OH HO LEWIS RES CTR AB The measured degradation of epitaxial shallow homojunction n(+)p InP solar cells under 1-MeV electron irradiation is correlated with that measured under 3-MeV proton irradiation based on 'displacement damage dose'. The measured data ave analyzed as a function of displacement damage dose from which an electron-to-proton dose equivalency ratio is determined which enables the electron and proton degradation data to be described by a single degradation carve. It is discussed how this single curve can be used to predict the cell degradation under irradiation by any particle energy. The degradation curve is used to compare the radiation response of lnP and GaAs/Ge cells on an absolute damage energy scale, The comparison shows InP to be inherently move resistant to displacement damage deposition than the GaAs/Ge. C1 UNIV MARYLAND,DEPT PHYS,CATONSVILLE,MD 21228. SFA INC,LANDOVER,MD 20785. RP Walters, RJ (reprint author), USN,RES LAB,CODE 6615,4555 OVERLOOK AVE SW,WASHINGTON,DC 20375, USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1062-7995 J9 PROG PHOTOVOLTAICS JI Prog. Photovoltaics PD MAR-APR PY 1996 VL 4 IS 2 BP 111 EP 116 DI 10.1002/(SICI)1099-159X(199603/04)4:2<111::AID-PIP127>3.0.CO;2-I PG 6 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA UL529 UT WOS:A1996UL52900004 ER PT J AU Summers, GP Walters, RJ Messenger, SR Burke, EA AF Summers, GP Walters, RJ Messenger, SR Burke, EA TI Role of radiation hard solar cells in minimizing the costs of global satellite communication systems SO PROGRESS IN PHOTOVOLTAICS LA English DT Article; Proceedings Paper CT 14th Space Photovoltaic Research and Technology Conference (SPRAT XIV) CY OCT 22-26, 1995 CL LEWIS RES CTR, CLEVELAND, OH HO LEWIS RES CTR AB An analysis embodied in a personal computer program is presented, which quantitatively demonstrates how the availability of radiation hard-solar cells can help to minimize the cost of a global satellite communication system. An important distinction between the currently proposed systems, such as lridium, Odyssey and Ellipsat, is the number of satellites employed and their operating altitudes. Analysis of the major costs associated with implementing these systems shows that operation at orbital altitudes within the Earth's radiation belts (10(3)-10(4) km) can reduce the total cost of a system by several hundred per cent,(1,2) so long as radiation-hard components, including solar cells, can be used. A detailed evaluation of the predicted performance of photovoltaic arrays using several different planar solar cell technologies is given, including commercially available Si and GaAs/Ge, and InP/Si which is currently under development. Several examples of applying the program ave given, which show that the end-of-life (EOL) power density of different technologies can vary by a factor of ten for certain missions. Therefore, although a relatively radiation-soft technology can usually provide the required EOL power by simply increasing the size of the array, the impact upon the total system budget could be unacceptable, due to increased launch and hardware costs. In aggregate, these factors can account for move than a 10% increase in the total system cost. Because the estimated total costs of proposed global-coverage systems range from $1 billion to $9 billion, the availability of radiation-hard solar cells could make a decisive difference in the selection of a particular constellation architecture. C1 SFA INC,LANDOVER,MD 20785. USN,RES LAB,WASHINGTON,DC 20375. UNIV MARYLAND,DEPT PHYS,BALTIMORE,MD 21228. NR 7 TC 2 Z9 2 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1062-7995 J9 PROG PHOTOVOLTAICS JI Prog. Photovoltaics PD MAR-APR PY 1996 VL 4 IS 2 BP 147 EP 154 PG 8 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA UL529 UT WOS:A1996UL52900008 ER PT J AU Hajian, AR Terzian, Y AF Hajian, AR Terzian, Y TI Planetary nebulae expansion distances .3. SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article ID NGC-6543; CATALOG; HALOES; VLA AB In a continuing project to determine accurate expansion-parallax distances to planetary nebulae, we have performed high-quality lambda 6-cm continuum observations of 12 nebulae with the Very Large Array. All of the sources in this imaging survey have one epoch of lambda 6-cm continuum data in the VLA archives. With two epochs for each planetary nebula, we applied the expansion parallax algorithm. Due in large part to the poor quality of the preexisting epoch, we were successful in only one case (NGC 7662), and obtained a lower limit to the distance for two PNe (Hu 1-2 and NGC 2440). Here, we also present new images acquired in this survey with the intent of reobserving the sample. Similar observations of these nebulae planned in 1997 should be sufficient to detect the expansion of a large percentage of the nebular shells. C1 CORNELL UNIV,NAIC,ITHACA,NY 14853. USN OBSERV,USNO NRL OPT INTERFEROMETER PROJECT,WASHINGTON,DC 20392. RP Hajian, AR (reprint author), CORNELL UNIV,DEPT ASTRON,ITHACA,NY 14853, USA. NR 34 TC 21 Z9 22 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD MAR PY 1996 VL 108 IS 721 BP 258 EP 264 DI 10.1086/133719 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TZ780 UT WOS:A1996TZ78000005 ER PT J AU Gossett, J AF Gossett, J TI Arctic research using nuclear submarines SO SEA TECHNOLOGY LA English DT Article RP Gossett, J (reprint author), USN,CTR UNDERSEA WARFARE,ARCTIC SUBMARINE LAB,FLEET OPERAT BRANCH,SAN DIEGO,CA 92152, USA. NR 0 TC 5 Z9 5 U1 0 U2 3 PU COMPASS PUBL INC PI ARLINGTON PA SUITE 1000 1117 N 19 ST, ARLINGTON, VA 22209 SN 0093-3651 J9 SEA TECHNOL JI Sea Technol. PD MAR PY 1996 VL 37 IS 3 BP 33 EP & PG 7 WC Engineering, Ocean SC Engineering GA UB173 UT WOS:A1996UB17300006 ER PT J AU Mullen, LJ Herczfeld, PR Contarino, VM AF Mullen, LJ Herczfeld, PR Contarino, VM TI Progress in hybrid Lidar-radar for ocean exploration SO SEA TECHNOLOGY LA English DT Article C1 USN,CTR AIR WARFARE,WARMINSTER,PA 18974. RP Mullen, LJ (reprint author), DREXEL UNIV,CTR MICROWAVE LIGHTWAVE ENGN,PHILADELPHIA,PA 19104, USA. NR 3 TC 3 Z9 4 U1 0 U2 0 PU COMPASS PUBL INC PI ARLINGTON PA SUITE 1000 1117 N 19 ST, ARLINGTON, VA 22209 SN 0093-3651 J9 SEA TECHNOL JI Sea Technol. PD MAR PY 1996 VL 37 IS 3 BP 45 EP & PG 6 WC Engineering, Ocean SC Engineering GA UB173 UT WOS:A1996UB17300008 ER PT J AU Almgren, AS Bell, JB Szymczak, WG AF Almgren, AS Bell, JB Szymczak, WG TI A numerical method for the incompressible Navier-Stokes equations based on an approximate projection SO SIAM JOURNAL ON SCIENTIFIC COMPUTING LA English DT Article DE incompressible flow; projection methods ID MIXING LAYERS AB In this method we present a fractional step discretization of the time-dependent incompressible Navier-Stokes equations. The method is based on a projection formulation in which we first solve diffusion-convection equations to predict intermediate velocities, which are then projected onto the space of divergence-free vector fields. Our treatment of the diffusion-convection step uses a specialized second-order upwind method for differencing the nonlinear convective terms that provides a robust treatment of these terms at a high Reynolds number. in contrast to conventional projection-type discretizations that impose a discrete form of the divergence-free constraint, we only approximately impose the constraint; i.e., the velocity held we compute is not exactly divergence-free. The approximate projection is computed using a conventional discretization of the Laplacian and the resulting linear system is solved using conventional multigrid methods. Numerical examples are presented to validate the second-order convergence of the method for Euler, finite Reynolds number, and Stokes now. A second example illustrating the behavior of the algorithm on an unstable shear layer is also presented. C1 USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903. RP Almgren, AS (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 20 TC 104 Z9 108 U1 3 U2 12 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER PH#382-9800, PHILADELPHIA, PA 19104-2688 SN 1064-8275 J9 SIAM J SCI COMPUT JI SIAM J. Sci. Comput. PD MAR PY 1996 VL 17 IS 2 BP 358 EP 369 DI 10.1137/S1064827593244213 PG 12 WC Mathematics, Applied SC Mathematics GA TX673 UT WOS:A1996TX67300004 ER PT J AU Pehrsson, PE Henderson, LJ Keller, TM AF Pehrsson, PE Henderson, LJ Keller, TM TI High-temperature oxidation of carborane-siloxane-acetylene-based polymer SO SURFACE AND INTERFACE ANALYSIS LA English DT Article ID RAMAN-SPECTROSCOPY; FIBER SURFACES; COMPOSITES; PROTECTION; SCATTERING; BEHAVIOR; CARBIDE; RESISTANCE; PYROLYSIS; CHEMISTRY AB A processable new thermosetting polymer containing carborane and siloxane groups with acetylenic linkages was examined for antioxidative properties during high-temperature oxygen exposure. Samples of the polymer were annealed in argon or air at 320-400 degrees C or argon at 900 degrees C and oxidized at 400 and 500 degrees C. Their structure and composition were analyzed by scanning electron microscopy, x-ray photoelectron spectroscopy, scanning Auger microprobe scattering and Raman microprobe scattering. Samples heated to 400 degrees C in argon exhibited little or no inorganic segregation, but developed surface layers of boron and silicon oxide when heated to 400 degrees C in air. Samples annealed in argon to 900 degrees C and then oxidized at 500 degrees C for up to 100 h developed a continuous silicon oxide surface layer with almost no underlying boron oxide. The layer retarded oxidation of the sample bulk at 500 degrees C. C1 USN,RES LAB,CHEM MAT BRANCH,WASHINGTON,DC 20375. RP Pehrsson, PE (reprint author), USN,RES LAB,GAS SURFACE DYNAM SECT,CODE 6174,WASHINGTON,DC 20375, USA. NR 32 TC 22 Z9 24 U1 9 U2 23 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0142-2421 J9 SURF INTERFACE ANAL JI Surf. Interface Anal. PD MAR PY 1996 VL 24 IS 3 BP 145 EP 151 PG 7 WC Chemistry, Physical SC Chemistry GA UA639 UT WOS:A1996UA63900001 ER PT J AU Hurley, CK Steiner, N Hoyer, RJ Menchaca, E Mitton, W Simonis, T Hartzman, RJ Johnson, AH Ng, J AF Hurley, CK Steiner, N Hoyer, RJ Menchaca, E Mitton, W Simonis, T Hartzman, RJ Johnson, AH Ng, J TI Novel HLA-B alleles, B*8201, B*3515 and B*5106, add to the complexity of serologic identification of HLA types SO TISSUE ANTIGENS LA English DT Article DE HLA-B; B*8201; B*3515; B*5106 ID MHC CLASS-I; HISTOCOMPATIBILITY ANTIGEN; POSITIVE SELECTION; PEPTIDE-BINDING; MOLECULES; SPECIFICITY; RECOGNITION; RESOLUTION; REPERTOIRE; EPITOPES AB Three class I alleles, B*8201, B*3515 and B*5106, have been described using DNA and cDNA sequencing. The B*8201 allele is most structurally related to B*5602, differing from it by 14 nucleotide substitutions resulting in 5 amino acid differences. The other two alleles, B*3515 and B*5106, differ from their most closely related HLA-B alleles by 2-3 nucleotide substitutions resulting in 1-2 amino acid substitutions, respectively. The majority of nucleotide substitutions marking these new alleles are observed in other HLA-B alleles suggesting that gene conversion and/or reciprocal recombination have created this diversity. All of the amino acid substitutions are predicted to alter the antigen binding site of the HLA-B molecule. The newly defined HLA-B allelic products were originally defined by their unusual serologic reactivity patterns. The B*8201 allelic product is serologically typed as a B ''blank'' or as a variant of B22 or B45. These patterns and the serologic reactivity of the other newly described allelic products are consistent with the protein sequence homology among specific HLA-B molecules. While serology remains a powerful tool for detecting HLA diversity, alleles generated by events resulting in the sharing of HLA sequence polymorphisms among alleles at a locus will continue to create complexity in the interpretation of typing results. C1 GEORGETOWN UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,WASHINGTON,DC. WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. USN,MED RES INST,BETHESDA,MD. NIH,HLA LAB,BETHESDA,MD 20892. GEORGETOWN UNIV,SCH MED,DEPT PEDIAT,WASHINGTON,DC 20007. NR 29 TC 21 Z9 22 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0001-2815 J9 TISSUE ANTIGENS JI Tissue Antigens PD MAR PY 1996 VL 47 IS 3 BP 179 EP 187 DI 10.1111/j.1399-0039.1996.tb02538.x PG 9 WC Cell Biology; Immunology; Pathology SC Cell Biology; Immunology; Pathology GA UG189 UT WOS:A1996UG18900002 PM 8740766 ER PT J AU Broome, JR AF Broome, JR TI Reduction of decompression illness risk in pigs by use of non-linear ascent profiles SO UNDERSEA & HYPERBARIC MEDICINE LA English DT Article DE decompression illness; decompression sickness; pigs; swine; decompression profile; non-linear decompression AB An established swine model of neurologic decompression illness (DCT) was adapted to investigate the influence of of no-stop ascent profile shape on DCI risk after deep air and heliox dives. Pigs underwent a simulated air dive in a dry chamber to 200 fsw (613 kPa) for 24 min bottom time. They were then decompressed at either a linear rate of 20 fsw/min (61 kPa/min) or on a nonlinear, fast-deep/slow-shallow profile. Both decompressions lasted 10 min. In the linear group, there were 11/20 cases of neurologic DCI, including 1 death and 8 severe cases, compared to 5/20 cases (1 severe) in the fast/slow group. Thirteen out of 20 from the linear group, vs. 6/20 of the non-linear group, had moderate or severe skin DCI affecting >20% skin surface area A similar study, but of paired, randomized, investigator-blind, and sequential design was performed with pigs breathing 80/20% heliox: Pigs were compressed to 250 fsw (766 kPa) for 8 min 50 s, then decompressed at either a linear 30 fsw/min (92 kPa/min), or on a fast/slow profile. Neurologic DCI occurred more frequently (P = 0.024) in the linear group (16/20; 1 death and 11 severe) than in the fast/slow group (8/20; 3 severe). Moderate or severe skin DCI affected 16/20 of the linear group compared to 3/20 of the fast/slow group (P = 0.0002). The study findings suggest that substantial reductions in DCI risk may be obtainable by manipulating the ascent profile after deep no-stop diving. This finding has potential application in both military and civil diving operations. RP Broome, JR (reprint author), USN,MED RES INST,BETHESDA,MD 20889, USA. NR 12 TC 4 Z9 4 U1 0 U2 0 PU UNDERSEA & HYPERBARIC MEDICAL SOC INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1066-2936 J9 UNDERSEA HYPERBAR M JI Undersea Hyperb. Med. PD MAR PY 1996 VL 23 IS 1 BP 19 EP 26 PG 8 WC Marine & Freshwater Biology; Medicine, Research & Experimental SC Marine & Freshwater Biology; Research & Experimental Medicine GA UC949 UT WOS:A1996UC94900004 PM 8653061 ER PT J AU Lillo, RS Ruby, A Gummin, DD Porter, WR Caldwell, JM AF Lillo, RS Ruby, A Gummin, DD Porter, WR Caldwell, JM TI Chemical safety of US Navy Fleet soda lime SO UNDERSEA & HYPERBARIC MEDICINE LA English DT Article DE ammonia; amines; carbon dioxide absorbent; diving; gas contamination; toxicology AB Contamination was suspected of U.S. Navy Fleet soda lime (High Performance Sodasorb) when an ammonia-like odor was reported during its use in August 1992. This material contained indicator dye and was used for carbon dioxide absorption during diving. This incident had a major impact on the U.S Navy diving program when the Navy temporarily banned use of Sodasorb and authorized Sofnolime as an interim replacement. The Naval Medical Research Institute was assigned to investigate. Testing involved sampling from the headspace (gas space) inside closed buckets and from an apparatus simulating conditions during operational diving. Volatile organic compounds were analyzed by gas chromatography and mass spectrometry; ammonia and amines were measured by infrared spectroscopy. Significant amounts of ammonia (up to 30 ppm), ethyl and diethyl amines (up to several ppm), and various aliphatic hydrocarbons (up to 60 ppm) were detected during testing of both Sodasorb and Sofnolime. Contaminants were slowly removed by gas flow and did not return. The source(s) of the ammonia and amines are unknown, although they may result from the breakdown of the indicator dye. Hydrocarbon contamination seems to result from the materials of which the bucket is constructed. Unfortunately, evaluation of potential hazards associated with this contamination is difficult, due in part to the large number of variables of operational use and the absence of appropriate exposure limits. Based on these findings, the U.S. Navy has begun to phase in, for all diving, non-indicating soda lime that will be required to meet defined contaminant limits. RP Lillo, RS (reprint author), USN,MED RES INST,8901 WISCONSIN AVE,BETHESDA,MD 20889, USA. NR 8 TC 4 Z9 4 U1 0 U2 2 PU UNDERSEA & HYPERBARIC MEDICAL SOC INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1066-2936 J9 UNDERSEA HYPERBAR M JI Undersea Hyperb. Med. PD MAR PY 1996 VL 23 IS 1 BP 43 EP 53 PG 11 WC Marine & Freshwater Biology; Medicine, Research & Experimental SC Marine & Freshwater Biology; Research & Experimental Medicine GA UC949 UT WOS:A1996UC94900008 PM 8653065 ER PT J AU Hilarides, RJ Gray, KA Guzzetta, J Cortellucci, N Sommer, C AF Hilarides, RJ Gray, KA Guzzetta, J Cortellucci, N Sommer, C TI Feasibility, system design, and economic evaluation of radiolytic degradation of 2,3,7,8-tetrachlorodibenzo-p-dioxin on soil SO WATER ENVIRONMENT RESEARCH LA English DT Article DE dioxin; gamma irradiation; hazardous waste; soil ID DIBENZO-PARA-DIOXINS; CONTAMINATED SOIL; SURFACTANTS; PHOTOLYSIS AB This research shows that gamma irradiation is both a technically and economically feasible method to degrade chlorinated dioxins on soil. Approximately 99% degradation of dioxin on a model soil was achieved using gamma radiation at a dose of 800 kGy. In addition, this research determined the initial pathway of destruction, identified several controlling parameters, and developed a mass balance on degradation. The general applicability of this model behavior was successfully tested in a native contaminated soil where nearly 75% of the dioxin was destroyed at a dose of 450 kGy. Through a theoretical and conceptual understanding of radiolysis in soil, a sound basis for engineering design was established. Gamma radiation sources are commercially available, and this research outlines a new application of an established technology. A number of irradiator designs are proposed, and preliminary economic estimates are made to demonstrate that radiolysis can be a real alternative to incineration. C1 USN,WASHINGTON,DC 20350. UNIV NOTRE DAME,DEPT CIVIL ENGN & GEOL SCI,NOTRE DAME,IN 46556. OCCIDENTAL CHEM CORP,CTR TECHNOL,DIOXIN LAB,DALLAS,TX 75380. RI Gray, Kimberly/B-6989-2009 NR 44 TC 8 Z9 8 U1 0 U2 4 PU WATER ENVIRONMENT FEDERATION PI ALEXANDRIA PA 601 WYTHE ST, ALEXANDRIA, VA 22314-1994 SN 1061-4303 J9 WATER ENVIRON RES JI Water Environ. Res. PD MAR-APR PY 1996 VL 68 IS 2 BP 178 EP 187 DI 10.2175/106143096X127361 PG 10 WC Engineering, Environmental; Environmental Sciences; Limnology; Water Resources SC Engineering; Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA TZ122 UT WOS:A1996TZ12200007 ER PT J AU Kovacic, G AF Kovacic, G TI Homoclinic orbits in the dynamics of resonantly driven coupled pendula SO ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK LA English DT Article ID PARAMETRIC-EXCITATION; ASYMPTOTIC STABILITY; BAND AB We present a plethora of homoclinic and heteroclinic orbits that exist in the phase space of a weakly nonlinear model describing small oscillations of two resonantly driven coupled pendula. These orbits connect equilibria in a resonance band, which is contained in an invariant plane, and is born under perturbation out of a circle of equilibria. Their existence is shown by using a combination of the Melnikov method and singular perturbation techniques. C1 USN,UNDERSEA WARFARE CTR,NEWPORT,RI 02841. RP Kovacic, G (reprint author), RENSSELAER POLYTECH INST,DEPT MATH SCI,TROY,NY 12180, USA. OI Wettergren, Thomas/0000-0002-6623-8412 NR 27 TC 28 Z9 29 U1 0 U2 0 PU BIRKHAUSER VERLAG AG PI BASEL PA PO BOX 133 KLOSTERBERG 23, CH-4010 BASEL, SWITZERLAND SN 0044-2275 J9 Z ANGEW MATH PHYS JI Z. Angew. Math. Phys. PD MAR PY 1996 VL 47 IS 2 BP 221 EP 264 DI 10.1007/BF00916826 PG 44 WC Mathematics, Applied SC Mathematics GA UH580 UT WOS:A1996UH58000004 ER PT J AU Bero, CA Roland, CM AF Bero, CA Roland, CM TI Terminal relaxations in linear and three-arm star polyisoprenes SO MACROMOLECULES LA English DT Article ID ENTANGLED POLYMER MELTS; ZERO-SHEAR VISCOSITY; RHEOLOGICAL PROPERTIES; HYDROGENATED POLYBUTADIENE; DIELECTRIC-SPECTROSCOPY; VISCOELASTIC PROPERTIES; CONCENTRATED-SOLUTIONS; HYDROCARBON POLYMERS; MOLECULAR-DYNAMICS; CIS-POLYISOPRENE AB Dynamic mechanical spectra were obtained for linear and three-arm star-branched polyisoprenes (PI) in the terminal region of the viscoelastic spectrum. Terminal relaxation times, defined from the peak frequency of the dispersion in the loss modulus, were found to be more sensitive to changes in temperature for the stars than for the linear polyisoprene. From Arrhenius plots of the ratio of the relaxation times for the star and linear polymers, an activation energy describing the excess temperature dependency of the stars was determined. The results were 2.3 and 3.2 kcal/mol for star PI with respective arm molecular weights equal to 18 and 44 times the molecular weight between entanglements. Unlike the linear PI, the star-branched polymers were thermorheologically complex. These results are very similar to the behavior of polybutadiene, hydrogenated polybutadiene, and hydrogenated polyisoprene. Nevertheless, they are unexpected, in that the existing hypothesis for the excess temperature dependence and thermorheological complexity of branched polymers should not apply to polyisoprene. C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NR 58 TC 32 Z9 33 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD FEB 26 PY 1996 VL 29 IS 5 BP 1562 EP 1568 DI 10.1021/ma951439s PG 7 WC Polymer Science SC Polymer Science GA TY139 UT WOS:A1996TY13900025 ER PT J AU Roland, CM Ngai, KL AF Roland, CM Ngai, KL TI The anomalous Debye-Waller factor and the fragility of glasses SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID NEUTRON-SCATTERING; SEGMENTAL RELAXATION; DYNAMICS; POLYMER; TRANSITION AB The correlation between the magnitude of the Debye-Waller anomaly and the temperature dependence of the relaxation time and viscosity of glass-forming liquids (i.e., their fragility) is investigated using the coupling model of relaxation. The correlation is shown to be a natural consequence of the relationship between the noncooperative and intermolecularly cooperative relaxation times of the model. Specifically, the deviation of the mean squared displacement from a linear temperature dependency increases as the fragility (in the Angell sense) of the glass-forming liquid increases because more fragile glasses exhibit substantially more short-time, noncooperative relaxation. This latter fact arises from their shorter noncooperative relaxation times, as deduced from the coupling model. (C) 1996 American Institute of Physics. RP Roland, CM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 29 TC 47 Z9 48 U1 0 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD FEB 22 PY 1996 VL 104 IS 8 BP 2967 EP 2970 DI 10.1063/1.471117 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TV787 UT WOS:A1996TV78700024 ER PT J AU Russell, TP Piermarini, GJ Block, S Miller, PJ AF Russell, TP Piermarini, GJ Block, S Miller, PJ TI Pressure, temperature reaction phase diagram for ammonium dinitramide SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID THERMAL-DECOMPOSITION; CHEMISTRY; CELL; KBAR AB The pressure, temperature reaction phase diagram for ammonium dinitramide (ADN) was determined using a high-temperature-high-pressure diamond anvil cell with optical polarizing light microscopy, Fourier transform infrared spectroscopy, laser-Raman spectroscopy, and energy dispersive X-ray diffraction. The phase diagram was determined between ambient pressure and 10.0 GPa over the temperature range from -75 degrees C to decomposition temperatures, or 120 degrees C. The diagram delineates the melting curve for alpha-ADN, a reversible phase transition in alpha-ADN forming a new high-pressure monoclinic polymorph, beta-ADN, and also identifies the pressure and temperature conditions at which a solid phase rearrangement occurs to form ammonium nitrate (AN) and N2O. Energy dispersive X-ray diffraction and Raman spectra were obtained for both alpha- and beta-ADN as a function of pressure at room temperature. C1 NATL INST STAND & TECHNOL,MAT SCI & ENGN LAB,GAITHERSBURG,MD 20899. USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903. RP Russell, TP (reprint author), USN,RES LAB,DIV CHEM,CODE 6110,WASHINGTON,DC 20375, USA. NR 22 TC 37 Z9 40 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD FEB 22 PY 1996 VL 100 IS 8 BP 3248 EP 3251 DI 10.1021/jp952144j PG 4 WC Chemistry, Physical SC Chemistry GA TX257 UT WOS:A1996TX25700066 ER PT J AU Holt, TR AF Holt, TR TI Mesoscale forcing of a boundary layer jet along the California coast SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID AUSTRALIAN SOUTHERLY BUSTERS; OCEAN DYNAMICS EXPERIMENT; NORTHERN CALIFORNIA; MARINE INVERSION; MODEL; PARAMETERIZATION; CYCLOGENESIS; AREA AB Mesoscale numerical model simulations were examined to investigate the thermal and topographic forcing of a boundary layer jet along the northern California coast from 0000 UTC May 2 to 1200 UTC May 3, 1990. Routine surface and upper air observations, satellite, and higher-resolution coastal observations (R/V Point Sur and Doppler wind profiler data) documented the diurnal evolution of a coastal marine atmospheric boundary layer (MABL), coastal cloud structure, and mesoscale features such as the coastal jet and land-sea breeze circulations that were reasonably well forecast by the numerical model. Sensitivity model simulations to coastal baroclinicity showed that the diurnal development and intensification of the coastal MABL jet located north of the San Francisco Bay area was a result of thermal forcing due to differential land-sea heating. Simulations in which the coastal baroclinicity was held fixed in time at a minimal strength showed no diurnal development of the MABL jet. The strength of the jet was approximated well by the thermal wind relationship, with the jet core located in the sloping marine inversion layer within one Rossby radius of deformation from the coastline. The steepness of the marine inversion at the coastline was enhanced by regions of strong MABL divergence just offshore and strong convergence onshore resulting from the sea breeze circulation. Modifications to coastal terrain in two separate sensitivity model simulations illustrated that the primary effect of coastal topography was to act as a barrier to the onshore intrusion of higher momentum offshore air. This blocking was due to a topographically forced vertical circulation with a strong descending branch located at the coast. This downslope flow and adiabatic warming steepened the MABL inversion at the coast and enhanced the coastal baroclinicity and the coastal jet. Simulations without coastal terrain showed a jet structure that was spatially diffuse across the coastline and displaced more shoreward. Simulations in which coastal valleys were removed and replaced by a larger coastal mountain range resulted in little modification to the coastal jet intensity or offshore displacement. C1 USN, POSTGRAD SCH, MONTEREY, CA USA. NR 32 TC 30 Z9 30 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X EI 2169-8996 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD FEB 20 PY 1996 VL 101 IS D2 BP 4235 EP 4254 DI 10.1029/95JD03231 PG 20 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA TW970 UT WOS:A1996TW97000029 ER PT J AU Skancke, A VanVechten, D Liebman, JF Skancke, PN AF Skancke, A VanVechten, D Liebman, JF Skancke, PN TI Strain energy of three-membered rings: A new ultradiagonal definition as applied to silicon- and carbon-containing species SO JOURNAL OF MOLECULAR STRUCTURE LA English DT Article ID ALTERNATIVE APPROACH; HYDROCARBONS; HEATS AB Strain energies (SEs) in the 3-membered rings (CH2)(2)X and (SiH2)(2)X, where X is CH2, NH, O and SiH2, have been calculated by ab initio methods using the homodesmic reactions cyclo-(CH2)(2)X --> 1/2cyclo-(CH2)(4)X(2) and cyclo-(SiH2)(2)X --> 1/2cyclo-(SiH2)(4)X(2) All species involved were fully geometry optimized by HF/6-31G** calculations, and energies were calculated at the MP2//SCF level. Thermal energy contributions were included. For the (CH2)(2)X series, we find that the SEs decrease on going from X being CH2 to NH to O, but increase substantially when X is SiH2. For the (SiH2)(2)X series we find a slight increase from X = CH2 to X = O, but all of these values are higher than for X = SiH2. The predicted SEs are in accordance with the limited experimental information available. C1 UNIV MARYLAND, DEPT CHEM & BIOCHEM, CATONSVILLE, MD 21228 USA. USN, RES LAB, DIV SPACE SCI, WASHINGTON, DC 20375 USA. UNIV TROMSO, DEPT CHEM, N-9037 TROMSO, NORWAY. NR 35 TC 25 Z9 25 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-2860 J9 J MOL STRUCT JI J. Mol. Struct. PD FEB 20 PY 1996 VL 376 BP 461 EP 468 DI 10.1016/0022-2860(95)09062-2 PG 8 WC Chemistry, Physical SC Chemistry GA UB794 UT WOS:A1996UB79400042 ER PT J AU Friedman, M Pasour, J Smithe, D AF Friedman, M Pasour, J Smithe, D TI Generation of a frequency agile modulated intense relativistic electron beam SO APPLIED PHYSICS LETTERS LA English DT Article AB A new mechanism for self-modulation of an annular intense relativistic electron beam is being described. The frequency of modulation can be tuned 10% by magnetically compressing the diameter of the electron beam. (C) 1996 American Institute of Physics. C1 MISSION RES CORP,NEWINGTON,VA 22122. RP Friedman, M (reprint author), USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD FEB 19 PY 1996 VL 68 IS 8 BP 1165 EP 1167 DI 10.1063/1.115711 PG 3 WC Physics, Applied SC Physics GA TV845 UT WOS:A1996TV84500046 ER PT J AU Ngai, KL Rizos, AK AF Ngai, KL Rizos, AK TI Parameterless explanation of the non-arrhenius conductivity in glassy fast ionic conductors SO PHYSICAL REVIEW LETTERS LA English DT Article ID NON-DEBYE RELAXATION; NA BETA-ALUMINA; DIFFUSION; MODEL; CROSSOVER; SYSTEMS AB Kincs and Martin [Phys. Rev. Lett. 76, 70 (1996)] have recently discovered a ubiquitous non-Arrhenius temperature dependence of the ionic conductivity in glassy fast ionic conductors when the conductivity exceeds the high level of 10(-3) to 10(-2) Omega(-1) cm(-1). This important experimental discovery is readily explained and reproduced quantitatively by the coupling scheme without the use of any adjustable parameter. C1 UNIV CRETE, DEPT CHEM, CRETE, GREECE. FORTH, GR-71409 IRAKLION, CRETE, GREECE. RP USN, RES LAB, WASHINGTON, DC 20375 USA. RI Rizos, Apostolos/F-6807-2011 NR 32 TC 75 Z9 75 U1 0 U2 5 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 19 PY 1996 VL 76 IS 8 BP 1296 EP 1299 DI 10.1103/PhysRevLett.76.1296 PG 4 WC Physics, Multidisciplinary SC Physics GA TV693 UT WOS:A1996TV69300029 ER PT J AU Deisz, JJ Hess, DW Serene, JW AF Deisz, JJ Hess, DW Serene, JW TI Incipient antiferromagnetism and low-energy excitations in the half-filled two-dimensional hubbard model SO PHYSICAL REVIEW LETTERS LA English DT Article ID CONSERVING APPROXIMATIONS; ELECTRON-SYSTEMS AB We present single-particle and thermodynamic properties of the half-filled single-band Hubbard model in 2D calculated in the self-consistent fluctuation exchange approximation. The low-energy excitations at moderate temperatures and small U are quasiparticles with a short lifetime. As the temperature is lowered, coupling to evolving spin fluctuations leads to the extinction of these quasiparticles, signaled by a weak pseudogap in the density of states and by a positive slope in Re Sigma(k(F), epsilon) and a local maximum in \Im Sigma(k(F), epsilon)\ at epsilon = 0. We explain these results using a simple spin-fluctuation model. C1 USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375. RP Deisz, JJ (reprint author), GEORGETOWN UNIV,DEPT PHYS,WASHINGTON,DC 20057, USA. NR 20 TC 74 Z9 74 U1 0 U2 0 PU AMERICAN 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 19 PY 1996 VL 76 IS 8 BP 1312 EP 1315 DI 10.1103/PhysRevLett.76.1312 PG 4 WC Physics, Multidisciplinary SC Physics GA TV693 UT WOS:A1996TV69300033 ER PT J AU Putcha, CS Ferritto, JM AF Putcha, CS Ferritto, JM TI Seismic hazard analysis-computer validation SO COMPUTERS & STRUCTURES LA English DT Article AB The purpose of this paper is to discuss the validation procedures used for validating a computer model developed for seismic hazard analysis. An elaborate and detailed computer model ([1] J. M. Ferritto, seismic hazard analysis, users guide #UG-0027, NCEL, Port Hueneme (1993)) was developed at the Naval Civil Engineering Laboratory (NCEL), Port Hueneme, California, to perform seismic hazard analysis. The purpose of this model is to predict the probabilities of non-exceedance of a given level of acceleration through the use of cumulative density function (CDF) of the exponential distribution. This CDF is generated by determining the contributions of various faults to the overall site acceleration level through the use of recurrence relationships. The model is presently being used to predict the non-exceedance acceleration probabilities for regions with single and multiple faults. The paper deals with validation of existing mathematical models used for generating the cumulative density function (CDF). Specifically, the tool used for random analysis, namely Monte Carlo simulation, is checked and found to be consistent with the general simulation procedures used in practice. Improved methods, such as variance reduction techniques (VRT) in conjunction with traditional Monte Carlo simulation procedures for generating the CDF, are used in this study to validate/improve the existing model. In addition, the actual CDF is also generated based on the actual data (without assumption of any particular distribution) both for direct simulation as well as for VRT. All these are compared with the theoretical model[1] used by NCEL. In all the cases, the non-exceedance acceleration probabilities predicted by the theoretical model are lower than the corresponding actual probabilities. This is checked both for single fault as well as multiple faults and the same behavior is repeated. Hence it is concluded that the NCEL model[1] is conservative. Specific suggestions to improve the model are given in the detailed report. C1 USN,CTR FACIL ENGN SERV,DIV WATERFRONT STRUCT,PORT HUENEME,CA 93043. RP Putcha, CS (reprint author), CALIF STATE UNIV FULLERTON,DEPT CIVIL ENGN,FULLERTON,CA 92634, USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0045-7949 J9 COMPUT STRUCT JI Comput. Struct. PD FEB 17 PY 1996 VL 58 IS 4 BP 679 EP 688 DI 10.1016/0045-7949(95)00167-F PG 10 WC Computer Science, Interdisciplinary Applications; Engineering, Civil SC Computer Science; Engineering GA TH098 UT WOS:A1996TH09800002 ER PT J AU Orazi, RJ Vu, TT McLandrich, MN Hewett, CA Poirier, PM AF Orazi, RJ Vu, TT McLandrich, MN Hewett, CA Poirier, PM TI Cascaded narrow channel fused fibre wavelength division multiplexers SO ELECTRONICS LETTERS LA English DT Article DE wavelength division multiplexing; optical couplers; multiplexing; demultiplexing AB Fused fibre wavelength division multiplexers with channel separations of 13-17nm have been concatenated in a tree structure to enhance their performance. These cascaded WDMs have been optimised for both maximum channel isolation and enhanced optical bandwidth of the rejected channel. Channel isolations of 40dB over a 1nm optical bandwidth, and 25dB over a 5 nm bandwidth, are achieved, with total insertion loss for the device below 0.5dB. RP Orazi, RJ (reprint author), USN,COMMAND CONTROL & OCEAN SURVEILLANCE CTR,RES DEV TEST & EVALUAT DIV,CODE 555,49285 ST,RM 110,SAN DIEGO,CA 92152, USA. NR 3 TC 3 Z9 5 U1 0 U2 0 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD FEB 15 PY 1996 VL 32 IS 4 BP 368 EP 370 DI 10.1049/el:19960255 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA UL770 UT WOS:A1996UL77000063 ER PT J AU Tanzer, DJ McClatchey, SK Lundy, D Regillo, CD AF Tanzer, DJ McClatchey, SK Lundy, D Regillo, CD TI Spontaneous hyphema secondary to a prominent tunica vasculosa lentis SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USN,MED CTR,DEPT OPHTHALMOL,SAN DIEGO,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 434 EP 434 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39700433 ER PT J AU Sampson, MT Krebs, WK Scribner, DA Essock, EA AF Sampson, MT Krebs, WK Scribner, DA Essock, EA TI Visual search in natural (visible, infrared, and fused visible and infrared) stimuli. SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USN,POSTGRAD SCH,CTR VISUAL SCI ADV DISPLAYS,WASHINGTON,DC 20350. USN,RES LAB,APPL OPT DIV,WASHINGTON,DC 20375. UNIV LOUISVILLE,DEPT PSYCHOL,LOUISVILLE,KY 40292. NR 0 TC 1 Z9 1 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 1362 EP 1362 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39701360 ER PT J AU DiVita, JC Popkin, SM AF DiVita, JC Popkin, SM TI Organizational factors influencing the binding of attributes to objects SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USN,SUBMARINE MED RES LAB,GROTON,CT. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 1382 EP 1382 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39701380 ER PT J AU Choplin, NT AF Choplin, NT TI Visual field results from a one-year multi-center randomized double-masked study comparing brimonidine tartrate to timolol maleate in the treatment of ocular hypertension and glaucoma SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USN,MED CTR,DEPT OPHTHALMOL,SAN DIEGO,CA 92152. USN,MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA 92152. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 2332 EP 2332 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39702329 ER PT J AU Essock, EA McCarley, JS Sinai, MJ Krebs, WK AF Essock, EA McCarley, JS Sinai, MJ Krebs, WK TI Functional assessment of night-vision enhancement of real-world scenes SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 UNIV LOUISVILLE,DEPT PSYCHOL,LOUISVILLE,KY 40292. USN,POSTGRAD SCH,CTR VISUAL SCI & ADV DISPLAYS,WASHINGTON,DC. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 2368 EP 2368 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39702365 ER PT J AU Pangilinan, RT Schallhorn, SC Blanton, CL Kaupp, SE McDonnell, PJ AF Pangilinan, RT Schallhorn, SC Blanton, CL Kaupp, SE McDonnell, PJ TI Analysis of motivational factors for requesting photorefractive keratectomy in United States Navy personnel SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 UNIV SO CALIF,DOHENY EYE INST,DEPT OPHTHALMOL,LOS ANGELES,CA. USN,MED CTR,SAN DIEGO,CA 92152. USN,HLTH RES CTR,SAN DIEGO,CA 92152. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 2633 EP 2633 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39702629 ER PT J AU Krebs, WK Lobik, D Therrien, C Essock, EA AF Krebs, WK Lobik, D Therrien, C Essock, EA TI Is an integrated DOG(S) or wavelet transform the best method to model sensitivity profiles underlying desensitization sensitization data SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USN,POSTGRAD SCH,CTR VISUAL SCI & ADV DISPLAYS,MONTEREY,CA. USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943. UNIV LOUISVILLE,DEPT PSYCHOL,LOUISVILLE,KY 40292. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 3353 EP 3353 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39703348 ER PT J AU Tidwell, JL Funk, KJ Zimmerman, A AF Tidwell, JL Funk, KJ Zimmerman, A TI Propofol and alfentanil prevent the rise in intraocular pressure caused by succinylcholine and intubation during a rapid sequence induction SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USN,DEPT OPHTHALMOL & ANESTHESIOL,MED CTR,SAN DIEGO,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 4402 EP 4402 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39704396 ER PT J AU Todorov, AT Liebovitch, LS Selector, LY Churilla, AM Gottschalk, WA Yeandle, S AF Todorov, AT Liebovitch, LS Selector, LY Churilla, AM Gottschalk, WA Yeandle, S TI Fluctuations of the transmembrane voltage have a fractal form SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 FLORIDA ATLANTIC UNIV,CTR COMPLEX SYST,BOCA RATON,FL 33431. COLUMBIA UNIV,DEPT OPHTHALMOL,NEW YORK,NY 10027. USN,MED RES INST,BETHESDA,MD. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 5105 EP 5105 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39705098 ER PT J AU Cooper, KP Slebodnick, P Thomas, ED AF Cooper, KP Slebodnick, P Thomas, ED TI Seawater corrosion behavior of laser surface modified Inconel 625 alloy SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE corrosion; inconel 625 ID WEAR AB Seawater corrosion behavior of laser surface processed Inconel 625 alloy was investigated. Three laser surface modified samples were prepared, one by laser melting, and the other two by laser melt;particle injection processing with tungsten carbide (WC) and titanium carbide (TiC) particles, respectively. Particle injection involved embedding the carbide particles into a laser melted surface and resulted in a metal matrix-particulate composite surface layer which was both hard and wear-resistant. While Inconel 625 is a corrosion resistant alloy suitable for marine applications, and WC and TiC are generally inert to chemical attack, results from this study showed that laser surface modification produced microstructures that were susceptible to seawater corrosion to varying degrees. Nominal corrosion was observed in the dendritic structure produced by laser melting of the alloy surface. In the particle injected samples, the WC particulate phase in contact with the Inconel alloy matrix showed different kinds of attack, while the TiC particulate phase showed none. In both particle injected samples, resolidification of the Inconel alloy melt produced significant departures in composition and microstructure from those of the base alloy. Eutectic and dendritic carbides and, in WC, interphase carbides were some of the resolidification byproducts that formed in the matrix surrounding the particulate. Alloyed with solute elements from the base alloy, each product phase contributed to unique forms of corrosion. A qualitative analysis of the corrosion behavior of the injected samples showed that corrosive damage was more severe in the WC injected sample than in the TiC injected sample and in the laser melted sample. This paper describes the processing, microstructural and compositional characterization, and seawater corrosion behavior of the laser surface modified samples, and attempts to explain the observations as a consequence of the formation of galvanic cells. C1 USN,RES LAB,DIV MAT SCI & TECHNOL,ENVIRONM EFFECTS BRANCH,WASHINGTON,DC 20375. RP Cooper, KP (reprint author), USN,RES LAB,DIV MAT SCI & TECHNOL,PHYS MET BRANCH,WASHINGTON,DC 20375, USA. NR 22 TC 38 Z9 44 U1 0 U2 10 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD FEB 15 PY 1996 VL 206 IS 1 BP 138 EP 149 DI 10.1016/0921-5093(95)10013-X PG 12 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA UA457 UT WOS:A1996UA45700018 ER PT J AU Sprangle, P Esarey, E Krall, J Ting, A AF Sprangle, P Esarey, E Krall, J Ting, A TI Vacuum laser acceleration SO OPTICS COMMUNICATIONS LA English DT Article ID PARTICLES RP Sprangle, P (reprint author), USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 17 TC 48 Z9 48 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0030-4018 J9 OPT COMMUN JI Opt. Commun. PD FEB 15 PY 1996 VL 124 IS 1-2 BP 69 EP 73 DI 10.1016/0030-4018(95)00618-4 PG 5 WC Optics SC Optics GA UE307 UT WOS:A1996UE30700012 ER PT J AU Bayer, M Ils, P Michel, M Forchel, A Reinecke, TL Knipp, PA AF Bayer, M Ils, P Michel, M Forchel, A Reinecke, TL Knipp, PA TI Size dependence of the changeover from geometric to magnetic confinement in In0.53Ga0.47As/InP quantum wires SO PHYSICAL REVIEW B LA English DT Article AB Photoluminescence studies on deep-etched In0.53Ga0.47As/InP quantum wires of several lateral widths L(x) greater than or equal to 25 M1 have been performed in magnetic fields up to B=8.0 T. By optically generating a dense electron-hole plasma in the quantum wires, emission from different lateral subbands has been observed. With the magnetic field aligned along the growth direction, a changeover of the characteristic length scale that determines the carrier quantization energies from the lateral wire width to the cyclotron length is observed with increasing B. This transformation is observed when the cyclotron energy becomes comparable to the quantization energy. The magnetic field at which this transition occurs increases proportionally to the inverse of the square of the wire width in agreement with theoretical calculations. C1 USN, RES LAB, WASHINGTON, DC 20375 USA. CHRISTOPHER NEWPORT UNIV, DEPT PHYS & COMP SCI, NEWPORT NEWS, VA 23606 USA. RP Bayer, M (reprint author), UNIV WURZBURG, AM HUBLAND, D-97074 WURZBURG, GERMANY. OI Forchel, Alfred/0000-0002-9377-9935 NR 16 TC 10 Z9 10 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 15 PY 1996 VL 53 IS 8 BP 4668 EP 4671 DI 10.1103/PhysRevB.53.4668 PG 4 WC Physics, Condensed Matter SC Physics GA TZ177 UT WOS:A1996TZ17700064 ER PT J AU Bundens, WP Bergan, JJ Halasz, NA Murray, J Drehobl, M AF Bundens, WP Bergan, JJ Halasz, NA Murray, J Drehobl, M TI Superficial femoral vein thrombosis: A potentially confusing term - Reply SO JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION LA English DT Letter C1 USN,MED CTR,SAN DIEGO,CA 92152. CTR HLTH CARE,SAN DIEGO,CA. RP Bundens, WP (reprint author), UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0098-7484 J9 JAMA-J AM MED ASSOC JI JAMA-J. Am. Med. Assoc. PD FEB 14 PY 1996 VL 275 IS 6 BP 445 EP 445 PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA TU638 UT WOS:A1996TU63800025 ER PT J AU Bennett, BR Shanabrook, BV Magno, R AF Bennett, BR Shanabrook, BV Magno, R TI Phonons in self-assembled (In,Ga,Al)Sb quantum dots SO APPLIED PHYSICS LETTERS LA English DT Article ID RAMAN-SCATTERING; SIZE DEPENDENCE; MICROCRYSTALS; MODES; CDSE AB Quantum dots of InSb, GaSb, and AlSb were grown on GaAs substrates by molecular beam epitaxy and characterized by atomic force microscopy and Raman spectroscopy. There is a clear correlation between the observation of quantum dots by atomic force microscopy and a phonon mode at an energy a few wavenumbers below the longitudinal optic phonon energy for thick (In,Ga,Al)Sb layers. In the case of nominally AlSb quantum dots, a two-mode behavior is observed and attributed to the segregation of Ga into the AlSb during growth. (C) 1996 American Institute of Physics. RP Bennett, BR (reprint author), USN,RES LAB,DIV ELECTR SCI & TECHNOL,WASHINGTON,DC 20375, USA. RI Bennett, Brian/A-8850-2008 OI Bennett, Brian/0000-0002-2437-4213 NR 17 TC 46 Z9 46 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD FEB 12 PY 1996 VL 68 IS 7 BP 958 EP 960 DI 10.1063/1.116111 PG 3 WC Physics, Applied SC Physics GA TU828 UT WOS:A1996TU82800028 ER PT J AU Brook, I Frazier, EH AF Brook, I Frazier, EH TI Microbiology of mediastinitis SO ARCHIVES OF INTERNAL MEDICINE LA English DT Article ID OPEN-HEART SURGERY; CONSECUTIVE OPERATIVE PROCEDURES; STERNAL WOUND-INFECTION; RISK-FACTORS; NECROTIZING MEDIASTINITIS; ANAEROBIC MEDIASTINITIS; MEDIAN STERNOTOMY; BACTEROIDES; COMPLICATIONS; MORTALITY AB Objective: To study the microbiologic and clinical characteristics of patients with mediastinitis. Methods: Retrospective review of clinical and laboratory data of 17 patients treated between 1980 and 1987. Results: Aerobic or facultative bacteria only were present in three patients (18%), anaerobic bacteria only in seven (41%), and mixed aerobic-anaerobic flora in seven (41%). In total, there were 42 isolates, 13 aerobic or facultative and 29 anaerobic bacteria, an average of 2.5 per specimen. Anaerobic bacteria predominated in infections that originated from esophageal perforation and orofacial, odontogenic, and gunshot sources. The predominant aerobes were alpha-hemolytic Streptococcus (three isolates), Staphylococcus aureus (two isolates), and Klebsiella pneumoniae (two isolates). The predominant anaerobes were Prevotella and Porphyromonas species (eight isolates), Peptostreptococcus species (seven isolates), and Bacteroides fragilis group (three isolates). Conclusion: These data highlight the polymicrobial aerobic-anaerobic nature of mediastinitis. C1 USN HOSP,DEPT PEDIAT,BETHESDA,MD. USN HOSP,DEPT INFECT DIS,BETHESDA,MD. NR 35 TC 40 Z9 42 U1 0 U2 1 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0003-9926 J9 ARCH INTERN MED JI Arch. Intern. Med. PD FEB 12 PY 1996 VL 156 IS 3 BP 333 EP 336 DI 10.1001/archinte.156.3.333 PG 4 WC Medicine, General & Internal SC General & Internal Medicine GA TU545 UT WOS:A1996TU54500014 PM 8572845 ER PT J AU Alexander, RK AF Alexander, RK TI No sympathy for Stumpf SO AVIATION WEEK & SPACE TECHNOLOGY LA English DT Letter RP Alexander, RK (reprint author), USN,RET,GALES FERRY,CT, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MCGRAW HILL INC PI NEW YORK PA 1221 AVENUE OF THE AMERICAS, NEW YORK, NY 10020 SN 0005-2175 J9 AVIAT WEEK SPACE TEC JI Aviat. Week Space Technol. PD FEB 12 PY 1996 VL 144 IS 7 BP 6 EP 6 PG 1 WC Engineering, Aerospace SC Engineering GA TU742 UT WOS:A1996TU74200005 ER PT J AU VanVechten, D Porter, FS Wood, KS Gulian, AM AF VanVechten, D Porter, FS Wood, KS Gulian, AM TI Alternative non-equilibrium superconducting X-ray detectors SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 6th International Workshop on Low Temperature Detectors (LTD6) CY AUG 28-SEP 01, 1995 CL BEATENBERG, SWITZERLAND SP Beer Brawand Fdn, Bern ID FILMS AB Non-equilibrium X-ray detectors based on isotropic superconductor absorbers offer the hope of energy resolution limited by the statistics of excitation production, i.e., delta E/E similar to(Delta/E)(1/2), where Delta is the superconducting gap energy. This can be numerically equal to that of the best bolometers at significantly higher operating temperatures. Superconducting Tunnel Junction Detectors (STJDs) count the X-ray event induced excitations (quasiparticles (QP)) as an excursion of the subgap tunnel current. While STJDs are presently the best studied QP readout scheme, they have made slow progress toward the limiting energy resolution. Some of the difficulties are enumerated herein and are inherent in tunnel junctions. One alternative is to measure the conductivity excursion of a superconducting film that follows photon absorption. This excursion obeys exactly the same equation as the effective quasiparticle tunneling conductivity in a Josephson junction. Hence the two schemes should produce the same readout waveforms when the same superconducting absorbers are used. Seven specific approaches to realizing the measurement are presented. All versions of the conductivity readout offer simpler sample fabrication than STJD. Any superconducting material may be used. In commercial applications, the obvious benefit in operating temperature of using the HTSC materials may more than compensate for the penalty in energy resolution. C1 ARMENIAN ACAD SCI,INST PHYS RES,ASHTARAK 378410,ARMENIA. USA,NAVAL RES LAB,WASHINGTON,DC 20375. RI Porter, Frederick/D-3501-2012 OI Porter, Frederick/0000-0002-6374-1119 NR 8 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD FEB 11 PY 1996 VL 370 IS 1 BP 34 EP 37 DI 10.1016/0168-9002(95)01039-4 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA UA324 UT WOS:A1996UA32400012 ER PT J AU Porter, FS VanVechten, D Blamire, MG Burnell, G AF Porter, FS VanVechten, D Blamire, MG Burnell, G TI Epitaxial base layer Nb superconducting tunnel junctions with Ta absorbers SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 6th International Workshop on Low Temperature Detectors (LTD6) CY AUG 28-SEP 01, 1995 CL BEATENBERG, SWITZERLAND SP Beer Brawand Fdn, Bern AB Superconducting tunnel junction detectors have shown theoretical promise in high resolution X-ray spectrometry. Here we present results for epitaxial Nb tunnel junctions with relatively thick Ta absorbers. In these devices the epitaxial Ta absorber also forms the base electrode for the junction. We report on several junction geometries where both the total size of the junction and the size of the absorber is varied. Current results show a maximum resolution of 65 eV at 5.89 keV, limited primarily by external noise in the junction signal. Significant differences in junction performance are observed for the variation in absorber size, although variation in total junction size from 15 x 15 mu m to 40 X 40 mu m shows no consistent effect on the resolution. The results indicate a significant loss of recombination phonons into the substrate. C1 UNIV CAMBRIDGE,DEPT MAT SCI & MET,CAMBRIDGE CB2 3QZ,ENGLAND. USN,RES LAB,WASHINGTON,DC 20375. RI Burnell, Gavin/C-8950-2009; Porter, Frederick/D-3501-2012 OI Burnell, Gavin/0000-0002-9486-0639; Porter, Frederick/0000-0002-6374-1119 NR 5 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD FEB 11 PY 1996 VL 370 IS 1 BP 50 EP 52 PG 3 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA UA324 UT WOS:A1996UA32400017 ER PT J AU Gulian, AM VanVechten, D AF Gulian, AM VanVechten, D TI Cascade modeling in superconductors: Production, registration and implications of branch imbalance potential SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 6th International Workshop on Low Temperature Detectors (LTD6) CY AUG 28-SEP 01, 1995 CL BEATENBERG, SWITZERLAND SP Beer Brawand Fdn, Bern ID NONEQUILIBRIUM AB The mechanism for creation of electron-hole branch imbalance in superconductors subjected to high-energy particle/radiation bombardment is considered. The physical basis for the production of imbalance lies in the geometrical difference between the densities of states in phase space for electron- and hole-like excitations in metals. The requirement of charge neutrality fails to prevent branch imbalance only in superconductors. Using appropriately modified kinetic equations, numerical solutions for the distribution functions of electron- and hole-excitation branches are obtained under steady state, non-equilibrium conditions. Recent experimental results on the response of Nb to pulsed laser energy deposition are also discussed. An order of magnitude estimate for the case of a 10 keV X-ray quantum detection is made. C1 USN,RES LAB,WASHINGTON,DC 20375. PHYS RES INST,ASHTARAK 378410,ARMENIA. NR 11 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD FEB 11 PY 1996 VL 370 IS 1 BP 107 EP 109 DI 10.1016/0168-9002(95)01064-5 PG 3 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA UA324 UT WOS:A1996UA32400034 ER PT J AU Imamura, JN Aboasha, A Wolff, MT Wood, KS AF Imamura, JN Aboasha, A Wolff, MT Wood, KS TI The stability properties of two-temperature white dwarf radiative shock waves SO ASTROPHYSICAL JOURNAL LA English DT Article DE accretion, accretion disks; instabilities; shock waves; stars, oscillations; white dwarfs ID PROTOSTELLAR ACCRETION FLOWS; DYNAMICAL MODELS; NEUTRON STARS; X-RAY; OBJECTS AB The stability properties of two-temperature radiative shocks with power-law cooling functions and cooling functions appropriate to accretion onto nonmagnetic white dwarfs are studied. Two-temperature effects are important whenever the cooling is fast compared to the electron-ion, e-i, energy coupling because, in most astrophysical environments, the electrons dominate the cooling while the ions act simply as stores of the thermal energy. Two-temperature effects are usually important for the shocks encountered in compact X-ray binary systems. We find that: (1) two-temperature effects enhance the oscillatory instability of radiative shock waves. The weaker the e-i coupling through the shock transition and in the postshock cooling region, the stronger the destabilization due to two-temperature effects. For example, for radial oscillations, the fundamental mode (F), the lowest frequency mode, is stable in one-temperature hows dominated by bremsstrahlung. In two-temperature flows, the F mode is unstable if tau(br)/tau(ei) less than similar to 1, where tau(br) and tau(ei) are the postshock bremsstrahlung and e-i energy equilibration timescales, if the e-i energy coupling through the shock transition is weak. By weak, we mean shocks for which the electrons emerge from the shock transition with less than similar to 40% of the thermal energy. When e-i coupling through the shock transition is strong, the radial F mode is stable regardless of the strength of the e-i coupling in the cooling region. This property of two-temperature flows means that observations of radial F mode oscillations in bremsstrahlung-dominated shocks could place constraints on the dissipation process at work in the strong shock waves encountered in astrophysical situations. (2) Radial oscillation modes behave as expected for realistic white dwarf functions (bremsstrahlung plus Compton cooling) in that Compton cooling strongly damps radial oscillations. However, for nonradial oscillations, Compton cooling actually enhances instability. This suggests that for weakly magnetic accretion flows where both bremsstrahlung and Compton cooling are important, shock oscillations could arise, contrary to expectations based on the effect Compton cooling has on the radial oscillations. C1 UNIV OREGON,INST THEORET SCI,EUGENE,OR 97403. UNIV OREGON,DEPT PHYS,EUGENE,OR 97403. USN,RES LAB,WASHINGTON,DC 20375. NR 25 TC 24 Z9 24 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 10 PY 1996 VL 458 IS 1 BP 327 EP 337 DI 10.1086/176815 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TT075 UT WOS:A1996TT07500028 ER PT J AU Lundgren, SC Cordes, JM Foster, RS Wolszczan, A Camilo, F AF Lundgren, SC Cordes, JM Foster, RS Wolszczan, A Camilo, F TI Optical studies of millisecond pulsar companions SO ASTROPHYSICAL JOURNAL LA English DT Article DE binaries, general; pulsars, individual (PSR J1640+2224, PSR J2145-0750); stars, evolution; stars, fundamental parameters (temperatures); white dwarfs ID EVOLUTION; BINARY; STARS; PHOTOMETRY; SYSTEM; DWARF AB In observations of four binary millisecond pulsars with the Palomar 200 inch (5.1 m) telescope, we have detected white dwarf companions to PSR J1640+2224 and PSR J2145 - 0750 and placed upper limits of m(r) = 24 and m(r) = 25 on companions to PSR J0751+1807 and PSR J2229+2643. The temperature inferred for the companion to PSR J1640+2224 is T = 3700 +/- 300 K. The luminosity inferred for a star at a distance of 1.2 kpc is consistent with that expected from a (2 +/- 1) x 10(9) yr old helium white dwarf. For PSR J2145-0750, the measured colors are inconsistent, possibly due to a combination of emission lines in the spectrum and systematic effects introduced when subtracting a nearby star. The companion temperature derived lies in the range 4300- 6800 K. For a carbon-oxygen white dwarf, the corresponding cooling age is 2-6 x 10(9) yr. The cooling ages of both systems with detected white dwarf companions are significantly less than the upper limits from the pulsar spin-down ages. For both pulsars, the inferred accretion rate for mass transfer during Roche lobe overflow is 2 orders of magnitude below Eddington accretion rates. C1 CORNELL UNIV,DEPT ASTRON,ITHACA,NY 14853. NATL ASTRON & IONOSPHERE CTR,ARECIBO OBSERV,ARECIBO,PR 00613. PENN STATE UNIV,DEPT ASTRON & ASTROPHYS,UNIVERSITY PK,PA 16802. PRINCETON UNIV,JOSEPH HENRY LABS,DEPT PHYS,PRINCETON,NJ 08544. UNIV MANCHESTER,NUFFIELD RADIO ASTRON LABS,JODRELL BANK,MACCLESFIELD SK11 9DL,CHESHIRE,ENGLAND. RP Lundgren, SC (reprint author), USN,RES LAB,REMOTE SENSING DIV,CODE 7210,WASHINGTON,DC 20375, USA. NR 37 TC 31 Z9 31 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 10 PY 1996 VL 458 IS 1 BP L33 EP & PN 2 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TT076 UT WOS:A1996TT07600009 ER PT J AU McLeod, MG AF McLeod, MG TI Spatial and temporal power spectra of the geomagnetic field SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID SIMULTANEOUS STOCHASTIC INVERSION; EARTHS MAGNETIC-FIELD; SECULAR VARIATION; MANTLE CONDUCTIVITY; MAIN FIELD; CORE; MAGSAT; PART AB Spatial and temporal power spectra of the geomagnetic field are useful for stochastic inversion and optimal prediction of the geomagnetic field and its secular variation. Spherical harmonic coefficients for the field and its first time derivative were determined from magnetic observatory annual means and first differences of annual means for each year in the time interval 1910-1983. Internal spherical harmonic coefficients through degree 9 and external zonal coefficients in geomagnetic coordinates for degrees 1, 3, 5, and 7 were included in the analysis. Autocovariance functions for spherical harmonic coefficients of the geomagnetic field were estimated from these coefficients. Characteristic time constants for the estimated internal autocovariance functions depend upon both spherical harmonic degree and whether the autocovariance function is for the field or its first derivative. The characteristic time constant for the field is approximately 10,000 years divided by the square of (n+1/2), where n is the spherical harmonic degree. The characteristic time constant for the first derivative is about a factor of 10 smaller. The first time constant is thought to be related to magnetic diffusion, and the second time constant is thought to be related to core-fluid velocity correlation time. There is also a third time constant of approximately 5 years associated with the second time derivative. External autocovariance functions for degree 1 and degree 3 both show clear evidence of a solar cycle component. A simple analytic expression for the spatial and temporal power spectra of the geomagnetic field was fitted to these data and agrees well with the experimental results. RP McLeod, MG (reprint author), USN, RES LAB, BAY ST LOUIS, MS USA. NR 38 TC 30 Z9 30 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD FEB 10 PY 1996 VL 101 IS B2 BP 2745 EP 2763 DI 10.1029/95JB03042 PG 19 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA TV380 UT WOS:A1996TV38000001 ER PT J AU Ngai, KL AF Ngai, KL TI Dynamics of semidilute solutions of polymers and associating polymers SO ADVANCES IN COLLOID AND INTERFACE SCIENCE LA English DT Article ID POLYVINYL METHYL-ETHER) SOLUTIONS; UNIVERSAL SCALING EQUATION; 12-ARM STAR POLYSTYRENES; NORMAL MODE PROCESS; LIGHT-SCATTERING; SELF-DIFFUSION; CONCENTRATED-SOLUTIONS; TRANSLATIONAL DIFFUSION; MOLECULAR-WEIGHT; DENSITY-FLUCTUATIONS AB A theory of dynamics and transport of polymers and polymer clusters in semidilute solutions is presented based on the coupling theory of the author generalized to include scaling concepts. In this theory the concentration fluctuation correlation function, phi(t) = /<\delta c(q)/(2)> where delta c(q)(t) is the concentration fluctuation of wave-vector q, is a stretched exponential function of time, exp-(t/tau(q,c))(1-n(c)). The coupling parameter n(c) increases with c and the relaxation time tau(q,c) has the q(-2/(1-n(c))) dependence on q. These basic predictions are supported by several experimental investigations using dynamic light scattering of different systems including solutions of associating polymers, hydroxypropylcellulose/water solutions, and solutions of polymer cluster. Some of these experimental data will be revisited to bring out the detailed correspondence between theoretical predictions and experimental facts. The theory is further developed here and used to interpret the measured tracer diffusion coefficient (D) by Lodge and coworkers of linear and star-branched polystyrenes with molecular weights (M) in semidilute solutions of poly(vinyl methyl ether)/o-fluorotoluene for different matrix molecular weights (P) and concentrations (c). The theory is capable of explaining the M dependence of D at fixed P and c; the stretched exponential c dependence of D at constant M and P; and also the P dependence of D at constant c and M. RP USN, RES LAB, WASHINGTON, DC 20375 USA. NR 66 TC 68 Z9 68 U1 1 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0001-8686 EI 1873-3727 J9 ADV COLLOID INTERFAC JI Adv. Colloid Interface Sci. PD FEB 8 PY 1996 VL 64 BP 1 EP 43 DI 10.1016/0001-8686(95)00273-1 PG 43 WC Chemistry, Physical SC Chemistry GA UA601 UT WOS:A1996UA60100001 ER PT J AU Nikiforovich, GV Kover, KE Kolodziej, SA Nock, B George, C Deschamps, JR FlippenAnderson, JL Marshall, GR AF Nikiforovich, GV Kover, KE Kolodziej, SA Nock, B George, C Deschamps, JR FlippenAnderson, JL Marshall, GR TI Design and comprehensive conformational studies of Tyr(1)-cyclo(D-Pen(2)-Gly(3)-Phe(4)-L-3-Mpt(5)) and Tyr(1)-cyclo(D-Pen(2)-Gly(3)-Phe(4)-D-3-Mpt(5)): Novel conformationally constrained opioid peptides SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID TOPOGRAPHICAL REQUIREMENTS; ENERGY MINIMIZATION; ENKEPHALIN ANALOGS; COUPLING-CONSTANTS; PROTEIN-STRUCTURE; DELTA-RECEPTOR; DISULFIDE BOND; ROTATING-FRAME; ENKEPHALIN; SPECTROSCOPY AB Two compounds, Tyr(1)-cyclo(D-Pen(2)-Gly(3)-Phe(4)-L-3-Mpt(5)) (DPMPT; 3-Mpt is trans-3-mercaptoproline) and Tyr(1)-cyclo(D-Pen(2)-Gly(3)-Phe(4)-D-3-Mpt(5)) (DPDMPT), were designed employing energy calculations. Geometrical comparison showed that some low-energy 3D structures of DPMPT and DPDMPT are compatible with the model for the delta-receptor-bound conformation of the well-known delta-selective DPDPE peptide Tyr(1)-cyclo(D-Pen(2)-Gly(3)-Phe(4)-D-Pen(5), which was proposed by us earlier. DPMPT and DPDMPT were tested for their binding to delta-, mu- and kappa-opioid receptors. The corresponding K-i values were 3.5, 68, and >5000 nM for DPMPT, and 103.7, >5000, and >5000 nM for DPDMPT, respectively. Independent studies by homo- and heteronuclear NMR spectroscopy and energy calculations showed that DPMPT exists in DMSO solution in conformational equilibrium among several backbone conformations with the same type of 3D structure for the cyclic moiety, but with somewhat different conformers of the acyclic part of the molecule and two types of rotamers for the D-Pen side chain, namely, t and g(-). For DPDMPT, energy calculations combined with the NMR data suggest that any one out of four low-energy conformers belonging to the same type of the backbone of the cyclic moiety may be a possible candidate for the DPDMPT conformer in DMSO. The DPDMPT structure revealed by X-ray crystallography showed remarkable similarity to DPDMPT solution conformations. The determined solution conformations of both compounds were compared to their suggested delta-receptor-bound conformers. Results of comparison showed that all four of the possible solution conformations of DPDMPT are nonsimilar to the DPDMPT delta-receptor-bound conformation, whereas two of the possible solution conformations of DPMPT are compatible with the suggested delta-receptor-bound conformation of DPMPT. This finding can explain the difference in binding of DPMPT and DPDMPT to delta-opioid receptors by a suggestion that the delta-receptor-bound conformation of DPMPT already preexists in solution, whereas solution conformations of DPDMPT should be more significantly distorted to match the delta-receptor-bound conformation of DPDMPT. C1 WASHINGTON UNIV,DEPT PHARMACOL,ST LOUIS,MO 63130. WASHINGTON UNIV,DEPT PSYCHIAT,ST LOUIS,MO 63130. LAJOS KOSSUTH UNIV,H-4010 DEBRECEN,HUNGARY. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. RP Nikiforovich, GV (reprint author), WASHINGTON UNIV,CTR MOLEC DESIGN,ST LOUIS,MO 63130, USA. RI Kover, Katalin/A-7054-2008; OI Deschamps, Jeffrey/0000-0001-5845-0010 NR 61 TC 12 Z9 12 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD FEB 7 PY 1996 VL 118 IS 5 BP 959 EP 969 DI 10.1021/ja952964+ PG 11 WC Chemistry, Multidisciplinary SC Chemistry GA TU348 UT WOS:A1996TU34800004 ER PT J AU Gheorghiu, A Senemaud, C BelinFerre, E Dankhazi, Z MagaudMartinage, L Papaconstantopoulos, DA AF Gheorghiu, A Senemaud, C BelinFerre, E Dankhazi, Z MagaudMartinage, L Papaconstantopoulos, DA TI Comparison of theoretical and experimental electronic distributions of Si-Ni and Si-Er alloys SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID X-RAY SPECTROSCOPY; SILICON; SI(111); FILMS; COSI2 AB The total and partial densities of states of SiNi3, Si2Ni and Si1.7Y have been calculated using a scalar relativistic self-consistent augmented plane-wave method (SiNi3) or a self-consistent linear muffin-tin orbital method in the atomic sphere approximation (Si2Ni and Si1.7Y) The x-ray photoemission valence band and soft-x-ray emission Si K beta and Ni L alpha spectra have been calculated by applying appropriate broadening factors to the theoretical densities-of-states curves; in the case of the x-ray photoemission spectra, photoionization cross sections have been taken into account. Very good agreement is found between the experimental x-ray photoemission and soft-x-ray emission spectra and the simulated spectral curves. C1 EOTVOS LORAND UNIV, INST SOLID STATE PHYS, H-1088 BUDAPEST, HUNGARY. CNRS, ETUD PROPRIETES ELECTR SOLIDES LAB, F-38042 GRENOBLE, FRANCE. USN, RES LAB, WASHINGTON, DC 20375 USA. RP Gheorghiu, A (reprint author), LAB CHIM PHYS MAT & RAYONNEMENT, URA CNRS 176, 11 RUE PIERRE & MARIE CURIE, F-75231 PARIS 05, FRANCE. NR 16 TC 5 Z9 5 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD FEB 5 PY 1996 VL 8 IS 6 BP 719 EP 728 DI 10.1088/0953-8984/8/6/012 PG 10 WC Physics, Condensed Matter SC Physics GA TW457 UT WOS:A1996TW45700012 ER PT J AU Long, JP Bermudez, VM Ramaker, DE AF Long, JP Bermudez, VM Ramaker, DE TI Structural determination of beta-SiC(100)-c(2x2) from C-1s surface-core-exciton and Si-2p absorption SO PHYSICAL REVIEW LETTERS LA English DT Article ID RESONANT PHOTOEMISSION; RECONSTRUCTION AB The marked polarization dependences of two C-ls surface-core-exciton transitions-as revealed by near-edge x-ray absorption fine structure on single-domain beta-SiC(100)-c(2 X 2)-are used, together with Si-2p absorption and molecular orbital cluster calculations, to settle the long-standing controversy over the structure of this surface. The surface is terminated with staggered rows of unusual, nearly triply-bonded C dimers bridging underlayer Si dimers. Resonant valence-band photoemission accompanying C-ls exciton autoionization reveals directly the electronic structure of the C dimers. C1 GEORGE WASHINGTON UNIV,DEPT CHEM,WASHINGTON,DC 20052. RP Long, JP (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 21 TC 90 Z9 90 U1 1 U2 4 PU AMERICAN 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 5 PY 1996 VL 76 IS 6 BP 991 EP 994 DI 10.1103/PhysRevLett.76.991 PG 4 WC Physics, Multidisciplinary SC Physics GA TT491 UT WOS:A1996TT49100035 ER PT J AU Agrawal, BN Bang, H AF Agrawal, BN Bang, H TI Adaptive structures for large precision antennas SO ACTA ASTRONAUTICA LA English DT Article ID LARGE SPACE STRUCTURES; VIBRATION CONTROL; DYNAMICS AB Optimal controller design approach for high precision pointing maneuver of flexible spacecraft by using adaptive structures is investigated in this paper. A parameter optimization technique is used to find out controller parameters minimizing a desired objective function which represents pointing performance of a flexible space structure. Multi-input and multi-output configuration used in this study also provides insight on the effectiveness of actuator location for improved performance. Copyright (C) 1996 Elsevier Science Ltd RP Agrawal, BN (reprint author), USN,POSTGRAD SCH,DEPT AERONAUT & ASTRONAUT,MONTEREY,CA 93943, USA. RI Bang, Hyochoong/C-1580-2011 NR 9 TC 4 Z9 4 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0094-5765 J9 ACTA ASTRONAUT JI Acta Astronaut. PD FEB PY 1996 VL 38 IS 3 BP 175 EP 183 DI 10.1016/0094-5765(96)00062-8 PG 9 WC Engineering, Aerospace SC Engineering GA VF656 UT WOS:A1996VF65600003 ER PT J AU Tuncer, IH Platzer, MF AF Tuncer, IH Platzer, MF TI Thrust generation due to airfoil flapping SO AIAA JOURNAL LA English DT Article AB Thrust generation on a single flapping airfoil and a flapping/stationary airfoil combination in tandem is studied parametrically. A multiblock Navier-Stokes solver is employed to compute unsteady flowfields. The unsteady flow-field around a single flapping airfoil is also computed by an unsteady potential how code, The numerical solutions predict thrust generation in flapping airfoils and a significant augmentation of thrust in flapping/stationary airfoil combinations in tandem. The propulsive efficiency is found to be a strong function of reduced frequency and the amplitude of the flapping motion. At a flapping amplitude of 0.40 chord lengths and a reduced frequency of 0.10, the propulsive efficiency of a single NACA 0012 airfoil was computed to be more than 70%. For the airfoil combination in tandem, the propulsive efficiency was augmented more than 40% at a reduced frequency of 0.75 and a flapping amplitude of 0.20 chord lengths when the airfoils are separated by about two chord lengths. RP Tuncer, IH (reprint author), USN,POSTGRAD SCH,DEPT AERONAUT & ASTRONAUT,MONTEREY,CA 93943, USA. NR 17 TC 58 Z9 61 U1 0 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD FEB PY 1996 VL 34 IS 2 BP 324 EP 331 DI 10.2514/3.13067 PG 8 WC Engineering, Aerospace SC Engineering GA TT877 UT WOS:A1996TT87700015 ER PT J AU Weir, GE AF Weir, GE TI A naval history of World War I - Halpern,PG SO AMERICAN HISTORICAL REVIEW LA English DT Book Review RP Weir, GE (reprint author), USN,HIST CTR,WASHINGTON,DC 20250, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER HISTORICAL REVIEW PI WASHINGTON PA 400 A ST SE, WASHINGTON, DC 20003 SN 0002-8762 J9 AM HIST REV JI Am. Hist. Rev. PD FEB PY 1996 VL 101 IS 1 BP 157 EP 158 DI 10.2307/2169242 PG 2 WC History SC History GA TX878 UT WOS:A1996TX87800022 ER PT J AU Meiers, JC Shook, LW AF Meiers, JC Shook, LW TI Effect of disinfectants on the bond strength of composite to dentin SO AMERICAN JOURNAL OF DENTISTRY LA English DT Article ID CARIES-DISCLOSING DYE; CAVITY PREPARATION; ROOT SURFACES; DETECTOR DYE; CHLORHEXIDINE; MICROFLORA AB Purpose: To investigate the effect of two cavity disinfectants, a 2% chlorhexidine (Bisco) and a 0.11% iodine/potassium-iodide/copper sulfate solution (ORA-5), on the shear bond strength of composite to dentin mediated by the dentin bonding agents (DBA), Syntac and Tenure. Materials and Methods: The occlusal surfaces of 72 non-carious extracted human molar teeth were flattened to dentin using 500 grit sandpaper. They were randomly assigned (n=12) to three groups within each DBA system: Bisco/Tenure, ORA-5/Tenure, Tenure, Bisco/Syntac, ORA-5/Syntac and Syntac. Dentin disinfectants were applied for 20 seconds and dried. DBA was applied following manufacturer's instructions. A hybrid resin composite (Tetric) was then bonded to all treated samples. The samples were thermocycled and tested in shear until failure. Fracture analysis was performed on dentin surfaces with both light and scanning electron microscopy. Shear bond strength data was analyzed using ANOVA, Student-Neuman-Keuls and Dunnett tests at P< 0.05. Results: Shear bond values (Mean +/- SD, MPa) were: Syntac control 14.3+/-2.0, Bisco/Syntac 8.1+/-4.9 and ORA-5/Syntac 5.7+/-5.1; Tenure control 15.0+/-1.9, Bisco/Tenure 14.2+/-3.0 and ORA-5/Tenure 13.9+/-3.7. The only significant difference found between disinfectant treatment groups and the control groups was with Syntac. Fracture surface analysis revealed that with Tenure most failures were cohesive in resin but with Syntac, the disinfected samples displayed adhesive failures. RP Meiers, JC (reprint author), USN,SCH DENT,8901 WISCONSIN AVE,BETHESDA,MD 20889, USA. NR 15 TC 34 Z9 36 U1 0 U2 0 PU MOSHER & LINDER, INC PI SAN ANTONIO PA 9859 IH-10 WEST, SUITE 107/489, SAN ANTONIO, TX 78230-2236 SN 0894-8275 J9 AM J DENT JI Am. J. Dent. PD FEB PY 1996 VL 9 IS 1 BP 11 EP 14 PG 4 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA TX875 UT WOS:A1996TX87500002 PM 9002807 ER PT J AU Brook, I Frazier, EH AF Brook, I Frazier, EH TI Aerobic and anaerobic microbiology of infected hemorrhoids SO AMERICAN JOURNAL OF GASTROENTEROLOGY LA English DT Article ID CUTANEOUS ABSCESSES; BACTERIOLOGY; BACTEROIDES AB Objectives: To study the aerobic and anaerobic microbiology of infected hemorrhoids, Methods: Retrospective review of the clinical microbiology records, Results: Aspirates of pus from infected hemorrhoids in 19 patients showed bacterial growth, Anaerobic bacteria only were recovered in six (32%) specimens, aerobic bacteria only in one (5%), and mixed aerobic and anaerobic bacteria in 12 (63%), Sixty-eight isolates were recovered: 39 anaerobes (2.1 isolates per specimen) and 29 aerobes (1.5 per specimen), The predominant anaerobes were Bacteroides sp, (13 isolates, including 10 Bacteroides fragilis groups) and 13 Peptostreptococcus sp, The predominant aerobes were Escherichia coli (7), Proteus sp, (5), group D streptococci (4), and Pseudomonas sp, (3), Conclusions: This study highlights the polymicrobial nature and predominance of anaerobic bacteria in infected hemorrhoids. C1 USN HOSP,DEPT PEDIAT,BETHESDA,MD. USN HOSP,DEPT INFECT DIS,BETHESDA,MD. NR 18 TC 7 Z9 8 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0002-9270 J9 AM J GASTROENTEROL JI Am. J. Gastroenterol. PD FEB PY 1996 VL 91 IS 2 BP 333 EP 335 PG 3 WC Gastroenterology & Hepatology SC Gastroenterology & Hepatology GA TV544 UT WOS:A1996TV54400023 PM 8607502 ER PT J AU Tolbert, CG Pratt, JC AF Tolbert, CG Pratt, JC TI Bleeding gastric ulcer SO AMERICAN JOURNAL OF NURSING LA English DT Article C1 UNIV MARYLAND,MED SYST,R ADAMS COWLEY SHOCK TRAUMA CTR,BALTIMORE,MD 21201. RP Tolbert, CG (reprint author), USN,NURSE CORPS,WASHINGTON,DC, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0002-936X J9 AM J NURS JI Am. J. Nurs. PD FEB PY 1996 VL 96 IS 2 BP 48 EP 48 PG 1 WC Nursing SC Nursing GA TT896 UT WOS:A1996TT89600018 PM 8629699 ER PT J AU Smith, BC Ellis, GL Slater, LJ Foss, RD AF Smith, BC Ellis, GL Slater, LJ Foss, RD TI Sclerosing polycystic adenosis of major salivary glands - A clinicopathologic analysis of nine cases SO AMERICAN JOURNAL OF SURGICAL PATHOLOGY LA English DT Article DE salivary; cyst; fibrocystic; sclerosis; adenosis; duct ectasia ID MAMMARY DUCT ECTASIA; COLLAGENOUS SPHERULOSIS; BREAST; TUMORS; CARCINOMA; HAMARTOMAS; CANCERS; DISEASE AB We describe nine cases of a histologically distinct and previously unreported lesion of the major salivary glands. The patients ranged in age from 12 to 63 years and included four males, five females. The lesions were slow-growing masses in the parotid gland (eight cases) and submandibular gland (one case). The clinical impression in each case was a benign salivary gland tumor. Grossly, the lesions were discrete, pale, rubbery nodules embedded within the salivary gland parenchyma. Microscopically, the lesions were unencapsulated, circumscribed masses of sclerotic and hyalinized collagenous tissue. Irregularly distributed throughout the collagenous tissue in a vaguely lobular pattern were hyperplastic ductal and acinar elements that were usually accompanied by cystically ectatic ducts. The dilated ducts frequently showed apocrine-like metaplasia and epithelial hyperplasia, which often formed transluminal bridges in a cribriform pattern. This epithelial hyperplasia sometimes surrounded eosinophilic globules as seen in so-called collagenous spherulosis. The combination of fibrosis, epithelial hyperplasia, and cystic changes were reminiscent of fibrocystic changes of the breast. Focally, acinar elements contained large, intensely eosinophilic, periodic acid-Schiff's-positive, intracytoplasmic granules believed to represent altered zymogen granules. A sparse to focally intense lymphocytic infiltrate accompanied the epithelial proliferations. Previous interpretations of these masses have included mucoepidermoid carcinoma, low-grade adenocarcinoma, benign adenoma, and mixed tumor. The limited available follow-up suggests that this process has a favorable prognosis despite recurrences in two cases. It is postulated that these lesions represent a pseudoneoplastic condition that results in both fibrosis and epithelial proliferation. We suggest the term sclerosing polycystic adenosis for these rare lesions. C1 ARMED FORCES INST PATHOL,DEPT ORAL PATHOL,WASHINGTON,DC 20306. ARMED FORCES INST PATHOL,DEPT OTOLARYNG & ENDOCRINE PATHOL,WASHINGTON,DC 20306. USN,DEPT ORAL PATHOL,NATL DENT CTR,BETHESDA,MD. USN,NATL DENT CTR,DEPT VET AFFAIRS,SPECIAL REFERENCE LAB PATHOL,BETHESDA,MD. NR 47 TC 43 Z9 46 U1 0 U2 1 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0147-5185 J9 AM J SURG PATHOL JI Am. J. Surg. Pathol. PD FEB PY 1996 VL 20 IS 2 BP 161 EP 170 DI 10.1097/00000478-199602000-00004 PG 10 WC Pathology; Surgery SC Pathology; Surgery GA TR968 UT WOS:A1996TR96800004 PM 8554105 ER PT J AU Turell, MJ Presley, SM Gad, AM Cope, SE Dohm, DJ Morrill, JC Arthur, RR AF Turell, MJ Presley, SM Gad, AM Cope, SE Dohm, DJ Morrill, JC Arthur, RR TI Vector competence of Egyptian mosquitoes for Rift Valley fever virus SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID HOST-FEEDING PATTERNS; CULEX-PIPIENS; CULICIDAE; DIPTERA; TRANSMISSION; DISSEMINATION; GOVERNORATE AB Reintroduction of Rift Valley fever (RVF) into Egypt in 1993 raised concerns about the potential for Egyptian mosquitoes to transmit the virus. We evaluated the ability of Aedes caspius, Culex pipiens, Cx. antennatus, Cx. perexiguus, Cx. poicilipes, and Anopheles pharoensis collected in the Aswan area and Cx. pipiens collected in the Nile Delta to transmit RVF virus. All mosquito species tested were susceptible to RVF virus infection, with An. pharoensis and Ae. caspius being the most sensitive to infection. However, none of 12 An. pharoensis, including 10 with a disseminated infection, transmitted RVF virus by bite. In contrast, nearly all Cx. pipiens (87%, n = 15) and Cx. perexiguus (90%, n = 10) with a disseminated infection transmitted virus. Overall transmission rates for mosquitoes exposed to hamsters with a viremia greater than or equal to 10(7) plaque-forming units/ml were Ae. caspius, 20% (n = 5); Cx. pipiens, 7% (n = 102); Cx. antennatus, 7% (n = 30); Cx. perexiguus, 11% (n = 9); and An. pharoensis, 0% (n = 7). Based on abundance, susceptibility to infection, ability to transmit virus, and feeding behavior, Ae. caspius appeared to be the most efficient vector of the Egyptian mosquitoes evaluated. While less susceptible than Ae. caspius, Cx. pipiens, Cx. antennatus, and Cx. perexiguus were also potential vectors during this RVF outbreak in Egypt. C1 USN,MED RES UNIT 3,CAIRO,EGYPT. AIN SHAMS UNIV,RES & TRAINING CTR VECTORS DIS,CAIRO,EGYPT. JOHNS HOPKINS UNIV,SCH PUBL HLTH,DEPT MOLEC MICROBIOL & IMMUNOL,BALTIMORE,MD. RP Turell, MJ (reprint author), USA,MED RES INST INFECT DIS,APPL RES DIV,DEPT EPIDEMIOL,FT DETRICK,MD 21702, USA. NR 20 TC 57 Z9 60 U1 0 U2 6 PU AMER SOC TROP MED & HYGIENE PI MCLEAN PA 8000 WESTPARK DRIVE SUITE 130, MCLEAN, VA 22101 SN 0002-9637 J9 AM J TROP MED HYG JI Am. J. Trop. Med. Hyg. PD FEB PY 1996 VL 54 IS 2 BP 136 EP 139 PG 4 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA TZ760 UT WOS:A1996TZ76000006 PM 8619436 ER PT J AU Bangs, MJ Rusmiarto, S Anthony, RL Wirtz, RA Subianto, DB AF Bangs, MJ Rusmiarto, S Anthony, RL Wirtz, RA Subianto, DB TI Malaria transmission by Anopheles punctulatus in the highlands of Irian Jaya, Indonesia SO ANNALS OF TROPICAL MEDICINE AND PARASITOLOGY LA English DT Article ID PLASMODIUM-VIVAX SPOROZOITES; LINKED-IMMUNOSORBENT-ASSAY; CIRCUMSPOROZOITE PROTEIN; MONOCLONAL-ANTIBODY; NEW-GUINEA; MOSQUITOS; POPULATION; VARIANT; ELISA; RATES AB A 21-month (1991-1992) assessment of malaria and the relative contribution of Anopheles punctulatus and An. koliensis to its transmission was conducted in Oksibil, a highland community in Irian Jaya, Indonesia. Nearly all (98%) of the 2577 Anopheles from indoor or outdoor human-landing collections were An. punctulatus. Nineteen (0.75%) of the 2518 An. punctulatus tested were positive when tested for malaria circumsporozoite protein (CSP) by ELISA: nine (45% of positives) for Plasmodium vivax-210, six (30%) for Plasmodium falciparum, three (15%) for P. vivax-247 and two (10%) for P. malariae. One mosquito was positive for both P. vivax 210 and P. falciparum. All 59 An. koliensis tested were negative. All mosquitoes positive for CSP were from indoor collections, 89% from the main houses and the remaining 11% from the traditional dwellings (bokams). These findings are discussed with respect to highland malaria epidemiology and transmission in the Oksibil Valley. C1 WALTER REED ARMY MED CTR,WALTER REED ARMY INST RES,DEPT ENTOMOL,WASHINGTON,DC 20307. DEPT HLTH,JAYAPURA 99017,INDONESIA. RP Bangs, MJ (reprint author), USN,MED RES UNIT 2,PUBLICAT OFF,BOX 3,APO,AP 96520, USA. NR 38 TC 14 Z9 14 U1 0 U2 1 PU W B SAUNDERS CO LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0003-4983 J9 ANN TROP MED PARASIT JI Ann. Trop. Med. Parasitol. PD FEB PY 1996 VL 90 IS 1 BP 29 EP 38 PG 10 WC Public, Environmental & Occupational Health; Parasitology; Tropical Medicine SC Public, Environmental & Occupational Health; Parasitology; Tropical Medicine GA TU809 UT WOS:A1996TU80900003 PM 8729625 ER PT J AU Bangs, MJ Purnomo Andersen, EM Anthony, RL AF Bangs, MJ Purnomo Andersen, EM Anthony, RL TI Intestinal parasites of humans in a highland community of Irian Jaya, Indonesia SO ANNALS OF TROPICAL MEDICINE AND PARASITOLOGY LA English DT Article ID PAPUA-NEW-GUINEA AB An indigenous, highland community in the Oksibil Valley of Irian Jaya, Indonesia, was examined on two occasions to determine the prevalence of intestinal parasites. Overall, 478 subjects from three villages in the study area, about 10% of the available population, were sampled. Using a standard, wet-mount technique, 15 different species of parasites were found. Hookworm was predominant in all age groups, with prevalences of 51%-86%, followed by Ascaris lumbricoides (46%-57%) and Trichuris trichiura (15%-25%). Strongyloides stercoralis was only seen infrequently (<1%). In general, intestinal protozoa were uncommon. Entamoeba histolytica (14%-20%) and Entamoeba coli (12%-17%) were the most frequent. Sex- and age-specific differences were not dramatic but prevalences and species diversity both increased with age up to 6-15 years, then decreased slightly into adulthood. Rarely were faecal samples free of detectable parasites and some adult subjects had as many as six species. The results are discussed with respect to previous studies in the highlands of New Guinea and the local transmission of soil- and water-borne parasites. RP Bangs, MJ (reprint author), USN,MED RES UNIT 2,PUBLICAT OFF,BOX 3,APO,AP 96520, USA. NR 12 TC 6 Z9 6 U1 0 U2 0 PU W B SAUNDERS CO LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0003-4983 J9 ANN TROP MED PARASIT JI Ann. Trop. Med. Parasitol. PD FEB PY 1996 VL 90 IS 1 BP 49 EP 53 PG 5 WC Public, Environmental & Occupational Health; Parasitology; Tropical Medicine SC Public, Environmental & Occupational Health; Parasitology; Tropical Medicine GA TU809 UT WOS:A1996TU80900005 PM 8729627 ER PT J AU Callahan, MP AF Callahan, MP TI Burma in 1995 - Looking beyond the release of Aung San Suu Kyi SO ASIAN SURVEY LA English DT Article RP Callahan, MP (reprint author), USN,POSTGRAD SCH,MONTEREY,CA 93943, USA. NR 6 TC 2 Z9 2 U1 0 U2 1 PU UNIV CALIF PRESS PI BERKELEY PA JOURNALS DEPT 2120 BERKELEY WAY, BERKELEY, CA 94720 SN 0004-4687 J9 ASIAN SURV JI Asian Surv. PD FEB PY 1996 VL 36 IS 2 BP 158 EP 164 DI 10.1525/as.1996.36.2.01p01035 PG 7 WC Area Studies SC Area Studies GA UF259 UT WOS:A1996UF25900008 ER PT J AU Standke, KJ Quirrenbach, A Krichbaum, TP Witzel, A Otterbein, K Alef, W Eckart, A Alberdi, A Marcaide, JM Ros, E Lesch, H Steffen, W Kraus, A Zensus, JA AF Standke, KJ Quirrenbach, A Krichbaum, TP Witzel, A Otterbein, K Alef, W Eckart, A Alberdi, A Marcaide, JM Ros, E Lesch, H Steffen, W Kraus, A Zensus, JA TI The intraday variable quasar 0917+624: VLBI and X-ray observations SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies, jets; quasars, QSO 0917+624; X-rays, galaxies; radio continuum, galaxies ID EXTRAGALACTIC RADIO-SOURCES; ACTIVE GALACTIC NUCLEI; BL LACERTAE; POLARIZATION CHANGES; RAPID VARIABILITY; COMPLETE SAMPLE; EMISSION; OUTBURSTS; SCATTERING; OBJECTS AB We present the first VLBI images of the extremely rapidly variable radio source 0917+624, at frequencies ranging from 2.3 to 22 GHz. They reveal a compact core containing similar to 75% of the total flux density, and a jet extending to the northwest at position angle -20 degrees. The jet is curved on the sub-milliarcsecond scale, and one of the jet components is elongated perpendicular to the jet direction. This component displays apparent superluminal motion with a speed of beta(app)h = 7.8 +/- 0.8(1)). A first detection of X-rays from 0917+624 with the ROSAT satellite enables us to estimate the magnetic field and the Doppler factor from synchrotron self-Compton theory. The observational results are compared with models for the rapid variability. The orientation of the jet on the sky is consistent with a prediction from two-component models that were developed to explain the polarization variations in 0917+624. The physical parameters derived from the new observations can be accomodated both by intrinsic (shock-in-jet or coherent emission) and extrinsic (interstellar scattering) explanations of the variability. C1 MAX PLANCK INST RADIOASTRON, D-53121 BONN, GERMANY. UNIV BONN, GEODAT IST, D-53115 BONN, GERMANY. USN OBSERV, NRL, USNO OPT INTERFEROMETER PROJECT, WASHINGTON, DC 20392 USA. UNIV SPACE RES ASSOC, WASHINGTON, DC 20024 USA. MAX PLANCK INST EXTRATERR PHYS, D-85748 GARCHING, GERMANY. CSIC, INST ASTROFIS ANDALUCIA, E-18080 GRANADA, SPAIN. UNIV VALENCIA, DEPT ASTRON, E-46100 BURJASSOT, SPAIN. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. NATL RADIO ASTRON OBSERV, SOCORRO, NM 87801 USA. NR 68 TC 18 Z9 18 U1 0 U2 0 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 1996 VL 306 IS 1 BP 27 EP 38 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TV308 UT WOS:A1996TV30800009 ER PT J AU Bietenholz, MF Bartel, N Rupen, MP Conway, JE Beasley, AJ Sramek, RA Romney, JD Titus, MA Graham, DA Altunin, VI Jones, DL Rius, A Venturi, T Umana, G Weiler, KW VanDyk, SD Panagia, N Cannon, WH Popelar, J Davis, RJ AF Bietenholz, MF Bartel, N Rupen, MP Conway, JE Beasley, AJ Sramek, RA Romney, JD Titus, MA Graham, DA Altunin, VI Jones, DL Rius, A Venturi, T Umana, G Weiler, KW VanDyk, SD Panagia, N Cannon, WH Popelar, J Davis, RJ TI VLBI observations of the ultracompact radio nucleus of the galaxy M81 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies, individual (M81); galaxies, nuclei; radio continuum, galaxies; techniques, interferometric ID ACTIVE GALACTIC NUCLEI; STARBURST; EMISSION AB VLBI observations of the nuclear region of the nearby spiral galaxy M81 reveal the smallest size yet for its core and that of any other extragalactic nucleus: 0.18 mas x 0.07 mas (700 AU x 300 AU) at 22.2 GHz. Images show no brightness structure outside the core region above the sensitivity limit of similar to 2% of the peak brightness. The core is slightly asymmetric with its brightness falling off along its major axis toward the northeast. There has been no significant change in the size and orientation since the last VLBI observation of this source in 1981, giving a nominal expansion velocity of -60 +/- 60 km s(-1). The size varies with observing frequency, with the length of the major axis being proportional to nu(-0.8). The apparent position angle is also frequency dependent, and changes by 35 degrees between 22.2 and 2.3 GHz, equivalent to such a change on a length scale from 700 to 4000 AU. These observations exclude a starburst or supernova origin of the core emission and instead argue for the core being an active galactic nucleus, perhaps with a bent jet, and with properties lying between those of Sgr A* and the cores of powerful radio galaxies and quasars. C1 NATL RADIO ASTRON OBSERV,SOCORRO,NM 87801. HAYSTACK OBSERV,WESTFORD,MA 01886. MAX PLANCK INST RADIOASTRON,D-53121 BONN,GERMANY. CALTECH,JET PROP LAB,PASADENA,CA 91109. CSIC,CTR ESTUD AVANZADOS,E-17300 BARCELONA,SPAIN. INTA,LAB ASTROFIS ESPACIAL & FIS FUNDAMENTAL,E-28080 MADRID,SPAIN. CNR,IST RADIOASTRON,I-40129 BOLOGNA,ITALY. CNR,IST RADIOASTRON,I-96017 NOTO,ITALY. USN,RES LAB,WASHINGTON,DC 20375. UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. INST SPACE & TERR SCI,N YORK,ON M3J 3K1,CANADA. NAT RESOURCES CANADA,OTTAWA,ON K1A 0Y3,CANADA. NUFFIELD RADIO ASTRON OBSERV LABS,MACCLESFIELD SK11 9DL,CHESHIRE,ENGLAND. RP Bietenholz, MF (reprint author), YORK UNIV,DEPT PHYS & ASTRON,N YORK,ON M3J 1P3,CANADA. RI Antonio, Rius/A-4873-2012; OI Antonio, Rius/0000-0002-5947-2649; Venturi, Tiziana/0000-0002-8476-6307 NR 34 TC 41 Z9 41 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 1 PY 1996 VL 457 IS 2 BP 604 EP 609 DI 10.1086/176756 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TQ546 UT WOS:A1996TQ54600012 ER PT J AU Cohen, D Wherry, RJ Glenn, F AF Cohen, D Wherry, RJ Glenn, F TI Analysis of workload predictions generated by multiple resource theory SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article AB Background: During the design process, operator workload assessments sometimes require subject matter experts (SME's) to predict the amount of physical and mental demands they expect during system employment. Often, these subjective estimates are considered within the context of models that partition human capabilities into discrete resources. Such models require the SME's to rate tasks on how they affect resource consumption. This type of assessment technique is based upon the premise that raters can effectively discriminate their own resources. Methods: Subjective workload ratings based on multiple resource theory were collected independently from two highly experienced pilots for 225 different tasks of an anticipated mission For a future advanced strike aircraft. The data were examined using a factor analytic approach. Results: Factor analysis of their responses suggest that while such ratings have high face validity and even high inter-rater reliabilities, the ratings could have little validity in terms of efforts required to use the seven postulated resource channels (i.e., visual or auditory input, spatial, verbal or analytical cognition, and manual or speech output). Ratings of efforts required for the cognitive resource channels were particularly suspect. We identified four independent factors for each pilot that accounted for virtually all of the intercorrelations among the 7 resource channels. Three factors (i.e., visual-spatial, verbal communications, and manual and speech output) were identical for both pilots and accounted for most of the explainable variance. Conclusion: Given these results, this analysis challenges the utility of a multiple resource framework for predictive workload assessments. C1 USN,AIR WARFARE CTR,DIV AIRCRAFT,WARMINSTER,PA. CHI SYST INC,SPRING HOUSE,PA. ROBERT J WHERRY JR CO,CHALFONT,PA. NR 11 TC 2 Z9 2 U1 0 U2 2 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD FEB PY 1996 VL 67 IS 2 BP 139 EP 145 PG 7 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TT661 UT WOS:A1996TT66100008 PM 8834939 ER PT J AU Berg, JS Moore, JL AF Berg, JS Moore, JL TI A case of ''eating disorder NOS'': Aeromedical implications of DSM-IV diagnostic criteria SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID ANOREXIA-NERVOSA; BULIMIA-NERVOSA; EPIDEMIOLOGY AB The authors describe a case of intermittent fasting and self-induced vomiting in a student aviator whose symptoms do not meet the full criteria for either anorexia or bulimia. The range of symptomatology and differential diagnosis of eating disorders is discussed. New DSM-IV diagnostic criteria for eating disorders, including Eating Disorder Not Otherwise Specified (NOS), and associated therapeutic alternatives are reviewed. The case demonstrates the importance of comprehensive physical and psychiatric evaluation of those patients with complex or atypical presentations. Issues pertaining to the aeromedical disposition of such patients are discussed, with emphasis on the role of the flight surgeon in the early recognition of eating disorders. RP Berg, JS (reprint author), USN,AEROSP & OPERAT MED INST,DEPT PSYCHIAT,220 HOVEY RD,PENSACOLA,FL 32508, USA. NR 23 TC 0 Z9 0 U1 1 U2 2 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD FEB PY 1996 VL 67 IS 2 BP 157 EP 160 PG 4 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TT661 UT WOS:A1996TT66100011 PM 8834942 ER PT J AU Testoff, MA Turner, DC Gaber, BP AF Testoff, MA Turner, DC Gaber, BP TI Direct enzymatic modification of a peptide surface with covalently immobilized alpha-chymotrypsin. SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 USN,RES LAB,LAB MOLEC INTERFACIAL INTERACT,WASHINGTON,DC 20375. NR 0 TC 1 Z9 1 U1 0 U2 1 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1996 VL 70 IS 2 BP MP363 EP MP363 PN 2 PG 1 WC Biophysics SC Biophysics GA TZ682 UT WOS:A1996TZ68201246 ER PT J AU Wadkins, RM Golden, JP Ligler, FS AF Wadkins, RM Golden, JP Ligler, FS TI Calibration of fiber optic biosensor response using simultaneous evanescent wave excitation of cyanine labeled capture antibodies and antigens. SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1996 VL 70 IS 2 BP MP340 EP MP340 PN 2 PG 1 WC Biophysics SC Biophysics GA TZ682 UT WOS:A1996TZ68201223 ER PT J AU Anachi, RB Easwaran, KRK Gaber, BP AF Anachi, RB Easwaran, KRK Gaber, BP TI Structure and molecular basis of filipin sterol interaction SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 INDIAN INST SCI,BANGALORE 560012,KARNATAKA,INDIA. USN,RES LAB CODE 6930,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1996 VL 70 IS 2 BP TU192 EP TU192 PN 2 PG 1 WC Biophysics SC Biophysics GA TZ682 UT WOS:A1996TZ68201712 ER PT J AU Bakaltcheva, I Rudolph, A Spargo, B AF Bakaltcheva, I Rudolph, A Spargo, B TI Shape stabilizing agents protect red blood cells against freeze-thaw damage SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1996 VL 70 IS 2 BP TU403 EP TU403 PN 2 PG 1 WC Biophysics SC Biophysics GA TZ682 UT WOS:A1996TZ68201923 ER PT J AU Leslie, SB Puvvada, S Ratna, BR Rudolph, AS AF Leslie, SB Puvvada, S Ratna, BR Rudolph, AS TI Cubic phase entrapped hemoglobin. An FTIR investigation. SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 0 TC 1 Z9 1 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1996 VL 70 IS 2 BP WP261 EP WP261 PN 2 PG 1 WC Biophysics SC Biophysics GA TZ682 UT WOS:A1996TZ68202446 ER PT J AU Oriba, HA Bucks, DAW Maibach, HI AF Oriba, HA Bucks, DAW Maibach, HI TI Percutaneous absorption of hydrocortisone and testosterone on the vulva and forearm: Effect of the menopause and site SO BRITISH JOURNAL OF DERMATOLOGY LA English DT Article AB The percutaneous absorption of hydrocortisone and testosterone was studied following their application to the vulvar and ventral forearm regions of pre- and post-menopausal women. Percutaneous absorption of hydrocortisone was significantly greater in vulvar skin than forearm skin in both pre- and post-menopausal women (P < 0.05, respectively), whereas the percutaneous absorption of testosterone was significantly increased (P < 0.01) on the vulva compared with the arm only in post-menopausal women. The effect of age on the percutaneous absorption of hydrocortisone and testosterone was evaluated by using the menopause as a biological chronometric end point, It is a common misconception that older skin has a diminished barrier capacity, and that percutaneous absorption is therefore greater, Our studies showed that absorption of hydrocortisone vulval skin of pre-menopausal women was significantly greater (P < 0.01) than in post-menopausal women, The ventral forearm skin of pre-menopausal women tended to show increased absorption compared with post-menopausal women, but statistical significance was not reached, No significant differences (P > 0.05) in the percutaneous absorption of testosterone in vulval or forearm skin were observed between the two age groups. C1 UNIV CALIF SAN FRANCISCO,SCH MED,DEPT DERMATOL,SAN FRANCISCO,CA 94143. RP Oriba, HA (reprint author), USN,HOSP OKINAWA,DEPT DERMATOL,PSC 482,BOX 2686,FPO,AP 96362, USA. NR 11 TC 19 Z9 21 U1 0 U2 1 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0007-0963 J9 BRIT J DERMATOL JI Br. J. Dermatol. PD FEB PY 1996 VL 134 IS 2 BP 229 EP 233 PG 5 WC Dermatology SC Dermatology GA TV994 UT WOS:A1996TV99400006 PM 8746334 ER PT J AU Robinson, AR Arango, HG Miller, AJ WarnVarnas, A Poulain, PM Leslie, WG AF Robinson, AR Arango, HG Miller, AJ WarnVarnas, A Poulain, PM Leslie, WG TI Real-time operational forecasting on shipboard of the Iceland-Faeroe frontal variability SO BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY LA English DT Article ID SEA; MODEL; WATER; AREA AB Real-time operational shipboard forecasts of Iceland-Faeroe frontal variability were executed for the first time with a primitive equation model. High quality, intensive hydrographic surveys during August 1993 were used for initialization, updating, and validation of the forecasts. Vigorous and rapid synoptic events occurred over several-day timescales including a southeastward reorientation of the Iceland-Faeroe Front and the development of a strong, cold deep-sock meander. A qualitative and quantitative assessment of the skill of these forecasts shows they captured the essential features of both events. The anomaly pattern correlation coefficient and the rms error between forecast and observed fields are particularly impressive (and substantially superior to persistence) for the forecast of the cold meander. C1 SCRIPPS INST OCEANOG,LA JOLLA,CA. SACLANT,UNDERSEA RES CTR,LA SPEZIA,ITALY. USN,RES LAB,STENNIS SPACE CTR,MN. RP Robinson, AR (reprint author), HARVARD UNIV,DIV APPL SCI,DEPT EARTH & PLANETARY SCI,PIERCE HALL,CAMBRIDGE,MA 02138, USA. OI Poulain, Pierre-Marie/0000-0003-1342-8463 NR 40 TC 19 Z9 20 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0003-0007 J9 B AM METEOROL SOC JI Bull. Amer. Meteorol. Soc. PD FEB PY 1996 VL 77 IS 2 BP 243 EP 259 DI 10.1175/1520-0477(1996)077<0243:RTOFOS>2.0.CO;2 PG 17 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA UB904 UT WOS:A1996UB90400003 ER PT J AU Kowtha, VC Bryant, HJ Krauthamer, V Iwasa, KH Stenger, DA AF Kowtha, VC Bryant, HJ Krauthamer, V Iwasa, KH Stenger, DA TI Spontaneous firing of NG108-15 cells induced by transient exposure to ammonium chloride SO CELLULAR AND MOLECULAR NEUROBIOLOGY LA English DT Article DE NG108-15; serum-free media; ammonium chloride; intracellular pH ID INTRACELLULAR PH; NEURONS; INACTIVATION; AXONS AB 1. We report that NG108-15 (neuroblastoma x glioma) cells differentiated in defined serum-free media are capable of exhibiting stable automaticity (the spontaneous occurrence of regenerative action potentials) following exposure to extracellular perfusates containing NH4Cl. 2. Membrane depolarization (4-5 mV) concomitant with an increased pH(i) during NH4Cl exposure are followed by hyperpolarization (5-7 mV), subthreshold oscillations, and spontaneous firing after the removal of NH4Cl. 3. Cells cultured in 10% serum did not exhibit automaticity. Cells cultured in serum-free media are twice as likely to show automaticity as those cultured in reduced (1.5%) serum media. 4. We have examined factors that contribute to the events following NH4Cl exposure, namely, membrane depolarization and hyperpolarization, subthreshold oscillations, and automaticity, The inward currents activated at more negative potentials and the ionic currents associated with pronounced afterhyperpolarization in NG108-15 cells cultured in serum-free media provide a basis for the repetitive activity in general and automaticity in particular. C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. UNIFORMED SERV UNIV HLTH SCI,DEPT PHYSIOL,BETHESDA,MD 20814. US FDA,ELECTROPHYS BRANCH,DPS,OST,CDRH,ROCKVILLE,MD 20857. NIDCD,NATL INST HLTH,SECT BIOPHYS SENSORY PROC,LCB,BETHESDA,MD 20892. OI Iwasa, Kuni/0000-0002-9397-7704 NR 14 TC 5 Z9 5 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4340 J9 CELL MOL NEUROBIOL JI Cell. Mol. Neurobiol. PD FEB PY 1996 VL 16 IS 1 BP 1 EP 9 DI 10.1007/BF02578382 PG 9 WC Cell Biology; Neurosciences SC Cell Biology; Neurosciences & Neurology GA TV608 UT WOS:A1996TV60800001 PM 8714555 ER PT J AU Brook, I Frazier, EH AF Brook, I Frazier, EH TI Microbiological analysis of pancreatic abscess SO CLINICAL INFECTIOUS DISEASES LA English DT Article C1 USN HOSP,DEPT PEDIAT,BETHESDA,MD. USN HOSP,DEPT INFECT DIS,BETHESDA,MD. NR 7 TC 12 Z9 12 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 1058-4838 J9 CLIN INFECT DIS JI Clin. Infect. Dis. PD FEB PY 1996 VL 22 IS 2 BP 384 EP 385 PG 2 WC Immunology; Infectious Diseases; Microbiology SC Immunology; Infectious Diseases; Microbiology GA TU876 UT WOS:A1996TU87600038 PM 8838210 ER PT J AU Lafreniere, RA Accorsi, ML AF Lafreniere, RA Accorsi, ML TI Eigenvalue extraction for large finite element models using a new conjugate gradient algorithm SO COMMUNICATIONS IN NUMERICAL METHODS IN ENGINEERING LA English DT Article DE eigenvalue extraction; conjugate gradient method; finite element method ID EIGENPROBLEMS AB A new conjugate gradient algorithm is presented for extracting eigenvalues from large systems of equations encountered in finite element analysis. The new algorithm involves applying the conjugate gradient method (CGM) to a static problem to generate an equivalent tridiagonal matrix used for eigenvalue computation. The eigenvalues of the tridiagonal matrix are then extracted using a QR factorization. The similarity of the new CGM with the Lanczos method is discussed regarding the need for matrix inversion and reorthogonalization. Several examples using the new method are presented to illustrate its performance. C1 UNIV CONNECTICUT,DEPT CIVIL ENGN,STORRS,CT 06269. RP Lafreniere, RA (reprint author), USN,CTR UNDERSEA WARFARE,NEW LONDON DETACHMENT,NEW LONDON,CT 06320, USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1069-8299 J9 COMMUN NUMER METH EN JI Commun. Numer. Methods Eng. PD FEB PY 1996 VL 12 IS 2 BP 77 EP 83 PG 7 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA TW942 UT WOS:A1996TW94200001 ER PT J AU Lewis, T AF Lewis, T TI The NC phenomena: Scenes from your living room SO COMPUTER LA English DT Editorial Material RP Lewis, T (reprint author), USN,POSTGRAD SCH,CODE CS,MONTEREY,CA 93943, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 0018-9162 J9 COMPUTER JI Computer PD FEB PY 1996 VL 29 IS 2 BP 8 EP 10 DI 10.1109/MC.1996.493395 PG 3 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA TU681 UT WOS:A1996TU68100002 ER PT J AU Ramamurti, R Lohner, R AF Ramamurti, R Lohner, R TI A parallel implicit incompressible flow solver using unstructured meshes SO COMPUTERS & FLUIDS LA English DT Article AB An incompressible flow solver based on unstructured grids is implemented on a parallel distributed memory computer architecture. An important phase in the flow solver is the solution of the elliptic equations for the velocities and pressure. This elliptic solver is parallelized and incorporated into both the explicit and implicit versions of the incompressible flow solver. Performance and scalability studies are carried out on both Intel iPSC 860 and the Intel Delta prototype, and these studies show that the code is scalable. A parallelizable load balancing algorithm is developed to be used in conjunction with the incompressible flow solver. Steady and unsteady flows over a tri-element airfoil and NACA0012 airfoil are computed using the parallel incompressible flow solver. C1 GEORGE WASHINGTON UNIV,WASHINGTON,DC 20052. RP Ramamurti, R (reprint author), USN,RES LAB,COMPUTAT PHYS & FLUID DYNAM LAB,WASHINGTON,DC 20375, USA. NR 12 TC 8 Z9 8 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0045-7930 J9 COMPUT FLUIDS JI Comput. Fluids PD FEB PY 1996 VL 25 IS 2 BP 119 EP 132 DI 10.1016/0045-7930(95)00032-1 PG 14 WC Computer Science, Interdisciplinary Applications; Mechanics SC Computer Science; Mechanics GA UA221 UT WOS:A1996UA22100002 ER PT J AU Marlowe, TJ Stoyenko, AD Laplante, PA Daita, RS Amaro, CC Nguyen, CM Howell, SL AF Marlowe, TJ Stoyenko, AD Laplante, PA Daita, RS Amaro, CC Nguyen, CM Howell, SL TI Multiple-goal objective functions for optimization of task assignment in complex computer systems SO CONTROL ENGINEERING PRACTICE LA English DT Article DE complex real-time systems; allocation; scheduling; heuristics; assignment ID REAL-TIME PROGRAMS; SCHEDULABILITY; ALLOCATION; PARALLEL; MODEL AB Complex systems are large applications, typically running on distributed, heterogeneous networks, driven by a number of distinct constraints and desiderata on goals such as performance, real-time behavior, and fault tolerance. These requirements frequently conflict, and satisfaction of these design objectives interacts strongly with assignment of system tasks to processors, The NSWC design framework DESTINATION provides an assignment module which can be used to optimize the system, as measured by the value of a weighted combination of objective cost functions, For even modest-sized systems and networks, assignment space is too large to search exhaustively; however, there are numerous algorithms which generate heuristically good assignments. However, compile-time evaluation of many interesting design factors, even those clearly related to assignment, is impossible without some estimate of the schedule. This paper therefore discusses approaches for determining a reasonable ''pseudo-schedule'' for a given system, network, and assignment, and the use of this to simulate execution in evaluating cost functions. C1 NEW JERSEY INST TECHNOL,REAL TIME COMP LAB,NEWARK,NJ 07102. FAIRLEIGH DICKINSON UNIV,DEPT MATH & COMP SCI,MADISON,NJ 07940. USN,CTR SURFACE WARFARE,DAHLGREN DIV,SILVER SPRING,MD 20903. RP Marlowe, TJ (reprint author), SETON HALL UNIV,DEPT MATH & COMP SCI,S ORANGE,NJ 07079, USA. NR 16 TC 0 Z9 0 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0967-0661 J9 CONTROL ENG PRACT JI Control Eng. Practice PD FEB PY 1996 VL 4 IS 2 BP 251 EP 256 DI 10.1016/0967-0661(95)00232-4 PG 6 WC Automation & Control Systems; Engineering, Electrical & Electronic SC Automation & Control Systems; Engineering GA TU884 UT WOS:A1996TU88400013 ER PT J AU Abernathy, GT Abrams, J Akhtar, S Albitar, I Amidi, M Anand, IS Arnold, JMO Ashton, T Aubrey, B Auger, P Babb, J Baigrie, R Baird, MG Baitz, T Barber, NC Barbour, DJ Barr, DM Basu, AK Baughman, KL Beckham, V BekheitSaad, S Berkson, DM Bertoglio, M Bessoudo, R Beaudoin, J Bhaskar, G Binder, A Bloomfield, D Bodine, K Boehmer, JP Borgersen, K Borts, D Bouchard, G Bourassa, MG Boutros, G Bozek, B Brisbin, D Brophy, J Brossoit, R Brown, E Brown, J Bruinsma, N Burton, G Cameron, A Campbell, R Campeau, J Campos, EE Cardello, FP Carter, RP Chan, YK Charles, FR Chaudhry, MA Chiaramida, A Chiaramida, S Chohan, A Christie, LG Clemson, BS Collin, R Cook, TH Copen, DL Cossett, J Costantino, T Crawford, MH Croke, RP Crowell, R DAmours, G Dagenais, GR Danisa, K Davidson, S Davies, ML Davies, R Davies, RA DeLarochelliere, R DeLeon, AC Delage, F Denes, P Dennish, GW Denny, DM DeVilla, MA DeYoung, JP Dhurandhar, RW DibnerDunlap, M Dodek, A Doherty, JE Dominguez, J Dubbin, J Dufton, J Effron, MB ElSherif, N Eladasari, B Fly, D Ericson, K Fahrenholtz, D Fast, A Fell, DA Fishman, S Fitchett, D Fleg, JL Flint, E Folger, JS Folkins, D Forker, AD Fowles, RE Fraker, TD Francis, G Frerking, TR Friesinger, GC Fulop, JC Gagnon, J Gamble, L Ganjavi, F Garrou, BW Gervais, PB Gheorghiade, M Gilbert, L Gillie, E Glatter, TR Godley, ML Goeres, M Goldberger, MH Gollapudi, A Goode, JE Goodman, LS Gordon, R Gossard, D Gosselin, G Goulet, C Grant, C Graettinger, WF Greene, JG Greenwood, PV Gregoratos, G Gregory, JJ Groden, DL Grover, J Gudapati, R Guess, MA Gupta, SC Habib, N Hack, I Hamilton, WP Hankey, TL Hanna, M Harper, D Harris, DE Hassapoyannes, CA Hatheway, RJ Heinsimer, J Pequignot, MH Heiselman, DE Hess, AR Hickner, J Hickey, JE Higgins, T Higginson, L Hill, L Hobbs, RE Honos, G Horner, BA Horwitz, L Hsieh, A Hsueh, JT Hubbard, J Hughes, DF Hui, W Imrie, JR Jacobs, MH Jarmukli, N Johnson, TH Johnstone, D Jutila, CK Kadri, N Kahl, FR Kaimal, PK Karnegis, J Kay, R Kelly, KJ Kenefick, G Kennelly, BM Kent, E Khan, AH Khanijo, V Khouri, M Kinloch, D Kirlin, PC Kiwan, GS Kline, MD Kohn, RM Koilpillai, C Kornder, JM Kouz, S Kumar, VA Kumar, U Kuntz, A Kuritzky, RA Kuruvilla, G Kwok, KK Lader, E Laforest, M LaForge, D Lalonde, G Lalonde, L Lang, RM Latour, Y Lawal, O LeBlanc, MH Lee, AB Lee, RW Legault, C Lemay, M Lenis, JHF Lepage, S Letarte, P Levesque, C LevinoffRoth, SN Lewis, BK Lipshutz, H Loungani, RR Lowery, ML Lubell, DL Lucariello, R LugoRodriguez, JE Lui, C Lutterodt, AT Lutz, L Machel, T Macina, G MacLellan, K Magnan, O Mansuri, M Manyari, DE Mallis, GI Marr, D Mast, DJ Mathew, J McBarron, FD McIntyre, KM McLean, RW McMahon, DP Mercier, M Methe, M Miller, AB Minkowitz, J Milton, JR Mizgala, HF Mohanty, PK Mohiuddin, S Montero, A Mookherjee, S Morris, A Morris, L Morrison, J Moten, M Nafziger, A Nair, PH Nawaz, S Neiman, JC Nutting, P NguyenPho, HT OBrien, TK OKelly, RL OReilly, MV Okerson, D Patel, G Pande, PN Papa, LA Patrick, L Payne, RM Perry, G Philbin, EF Pierpont, G Pitt, WA Poirier, C Pollak, EM Popio, K Poulin, JF Probst, PA Pruneau, G Pu, C Puram, BS Putatunda, B Quinn, B Rabkin, SW Racine, N Raco, DL Radant, L Radford, MJ Radwany, S Rajachar, M Ramanathan, KB Rashkow, A Rausch, DC Read, L Reddy, KR Reid, R Rich, MW Ricci, AJ Richman, HG Riley, A Rim, DA Rinne, C Roberge, G Roberts, DK Robinson, V Rodeheffer, RT Rosenstein, R Roth, DL Rothbart, R Rouleau, JL Ruble, P Sacco, J Safford, RE Salmon, D Sahay, BM Sarma, RJ Sayeed, MAR Schick, EC Schroeder, GS Seifert, M Senaratne, MPJ Sestier, F Shah, A Shanes, JG Sheesley, K Silverman, A Shiva, T Shrestha, DD Silver, MA Silverberg, L Simard, L Singh, BN Small, RS Smith, MR Smith, S Sochowski, RA Southern, RF Sridharan, MR StHilaire, R Stein, M Stewart, JW Stillabower, ME Sullivan, BHM Sturrock, WA Sussex, BA Swan, J Swenson, L Talbot, P Talibi, T Tamilia, M Tan, A Tanser, PH Tarry, L Teo, KK Thadani, U Thagirisa, S Thompson, B Thornton, R Timmis, GC Tobin, M Tommaso, C Toren, M Tsuyuki, R Turek, M Utley, K Vanderbush, EJ VanVoorhees, L Ventura, H Vertes, G Vizel, S Wagner, KR Wagner, S Weeks, A Weingert, ME Weinstein, C Weiss, MM Weiss, R Wickemeyer, W Wielgoz, A Willens, HJ Williams, WL Wong, D Yarows, SA Yao, L Shalev, Y Young, JB Yousefian, M Zajac, EJ Zatuchni, J Ziperman, DB Zoble, RG Zoneraich, S Gorlin, R Sleight, P Cohn, JN Collins, R Deykin, D Hennekens, C Kjekshus, J Smith, TW Tognoni, G Collins, JF Williford, WO Fye, C Sather, R Jolly, MK Held, CP Verter, J Yusuf, S Egan, D Garg, R Johnstone, DE Montague, T Bristow, D Engelhardt, HT Gent, M Hood, WB Jones, S Meier, P Pitt, B Waters, D Arnold, JMO Baker, A Barnhill, S Carew, B Hagar, S Liuni, C Martin, S Miles, R Arthur, MM Feldbush, MW Highfield, DA Hobbins, TE Kurz, R Leviton, SP Libonati, JP Moore, M Perez, E Mills, P Geller, N Hunsberger, S Gold, J Huang, PC Burns, A Caleb, H Cline, DR Harris, S Hockenbrock, R Horney, RA Jadwin, LM King, J Sexton, P Spence, ME Chacon, F Gagne, W Maple, S Martinez, G AF Abernathy, GT Abrams, J Akhtar, S Albitar, I Amidi, M Anand, IS Arnold, JMO Ashton, T Aubrey, B Auger, P Babb, J Baigrie, R Baird, MG Baitz, T Barber, NC Barbour, DJ Barr, DM Basu, AK Baughman, KL Beckham, V BekheitSaad, S Berkson, DM Bertoglio, M Bessoudo, R Beaudoin, J Bhaskar, G Binder, A Bloomfield, D Bodine, K Boehmer, JP Borgersen, K Borts, D Bouchard, G Bourassa, MG Boutros, G Bozek, B Brisbin, D Brophy, J Brossoit, R Brown, E Brown, J Bruinsma, N Burton, G Cameron, A Campbell, R Campeau, J Campos, EE Cardello, FP Carter, RP Chan, YK Charles, FR Chaudhry, MA Chiaramida, A Chiaramida, S Chohan, A Christie, LG Clemson, BS Collin, R Cook, TH Copen, DL Cossett, J Costantino, T Crawford, MH Croke, RP Crowell, R DAmours, G Dagenais, GR Danisa, K Davidson, S Davies, ML Davies, R Davies, RA DeLarochelliere, R DeLeon, AC Delage, F Denes, P Dennish, GW Denny, DM DeVilla, MA DeYoung, JP Dhurandhar, RW DibnerDunlap, M Dodek, A Doherty, JE Dominguez, J Dubbin, J Dufton, J Effron, MB ElSherif, N Eladasari, B Fly, D Ericson, K Fahrenholtz, D Fast, A Fell, DA Fishman, S Fitchett, D Fleg, JL Flint, E Folger, JS Folkins, D Forker, AD Fowles, RE Fraker, TD Francis, G Frerking, TR Friesinger, GC Fulop, JC Gagnon, J Gamble, L Ganjavi, F Garrou, BW Gervais, PB Gheorghiade, M Gilbert, L Gillie, E Glatter, TR Godley, ML Goeres, M Goldberger, MH Gollapudi, A Goode, JE Goodman, LS Gordon, R Gossard, D Gosselin, G Goulet, C Grant, C Graettinger, WF Greene, JG Greenwood, PV Gregoratos, G Gregory, JJ Groden, DL Grover, J Gudapati, R Guess, MA Gupta, SC Habib, N Hack, I Hamilton, WP Hankey, TL Hanna, M Harper, D Harris, DE Hassapoyannes, CA Hatheway, RJ Heinsimer, J Pequignot, MH Heiselman, DE Hess, AR Hickner, J Hickey, JE Higgins, T Higginson, L Hill, L Hobbs, RE Honos, G Horner, BA Horwitz, L Hsieh, A Hsueh, JT Hubbard, J Hughes, DF Hui, W Imrie, JR Jacobs, MH Jarmukli, N Johnson, TH Johnstone, D Jutila, CK Kadri, N Kahl, FR Kaimal, PK Karnegis, J Kay, R Kelly, KJ Kenefick, G Kennelly, BM Kent, E Khan, AH Khanijo, V Khouri, M Kinloch, D Kirlin, PC Kiwan, GS Kline, MD Kohn, RM Koilpillai, C Kornder, JM Kouz, S Kumar, VA Kumar, U Kuntz, A Kuritzky, RA Kuruvilla, G Kwok, KK Lader, E Laforest, M LaForge, D Lalonde, G Lalonde, L Lang, RM Latour, Y Lawal, O LeBlanc, MH Lee, AB Lee, RW Legault, C Lemay, M Lenis, JHF Lepage, S Letarte, P Levesque, C LevinoffRoth, SN Lewis, BK Lipshutz, H Loungani, RR Lowery, ML Lubell, DL Lucariello, R LugoRodriguez, JE Lui, C Lutterodt, AT Lutz, L Machel, T Macina, G MacLellan, K Magnan, O Mansuri, M Manyari, DE Mallis, GI Marr, D Mast, DJ Mathew, J McBarron, FD McIntyre, KM McLean, RW McMahon, DP Mercier, M Methe, M Miller, AB Minkowitz, J Milton, JR Mizgala, HF Mohanty, PK Mohiuddin, S Montero, A Mookherjee, S Morris, A Morris, L Morrison, J Moten, M Nafziger, A Nair, PH Nawaz, S Neiman, JC Nutting, P NguyenPho, HT OBrien, TK OKelly, RL OReilly, MV Okerson, D Patel, G Pande, PN Papa, LA Patrick, L Payne, RM Perry, G Philbin, EF Pierpont, G Pitt, WA Poirier, C Pollak, EM Popio, K Poulin, JF Probst, PA Pruneau, G Pu, C Puram, BS Putatunda, B Quinn, B Rabkin, SW Racine, N Raco, DL Radant, L Radford, MJ Radwany, S Rajachar, M Ramanathan, KB Rashkow, A Rausch, DC Read, L Reddy, KR Reid, R Rich, MW Ricci, AJ Richman, HG Riley, A Rim, DA Rinne, C Roberge, G Roberts, DK Robinson, V Rodeheffer, RT Rosenstein, R Roth, DL Rothbart, R Rouleau, JL Ruble, P Sacco, J Safford, RE Salmon, D Sahay, BM Sarma, RJ Sayeed, MAR Schick, EC Schroeder, GS Seifert, M Senaratne, MPJ Sestier, F Shah, A Shanes, JG Sheesley, K Silverman, A Shiva, T Shrestha, DD Silver, MA Silverberg, L Simard, L Singh, BN Small, RS Smith, MR Smith, S Sochowski, RA Southern, RF Sridharan, MR StHilaire, R Stein, M Stewart, JW Stillabower, ME Sullivan, BHM Sturrock, WA Sussex, BA Swan, J Swenson, L Talbot, P Talibi, T Tamilia, M Tan, A Tanser, PH Tarry, L Teo, KK Thadani, U Thagirisa, S Thompson, B Thornton, R Timmis, GC Tobin, M Tommaso, C Toren, M Tsuyuki, R Turek, M Utley, K Vanderbush, EJ VanVoorhees, L Ventura, H Vertes, G Vizel, S Wagner, KR Wagner, S Weeks, A Weingert, ME Weinstein, C Weiss, MM Weiss, R Wickemeyer, W Wielgoz, A Willens, HJ Williams, WL Wong, D Yarows, SA Yao, L Shalev, Y Young, JB Yousefian, M Zajac, EJ Zatuchni, J Ziperman, DB Zoble, RG Zoneraich, S Gorlin, R Sleight, P Cohn, JN Collins, R Deykin, D Hennekens, C Kjekshus, J Smith, TW Tognoni, G Collins, JF Williford, WO Fye, C Sather, R Jolly, MK Held, CP Verter, J Yusuf, S Egan, D Garg, R Johnstone, DE Montague, T Bristow, D Engelhardt, HT Gent, M Hood, WB Jones, S Meier, P Pitt, B Waters, D Arnold, JMO Baker, A Barnhill, S Carew, B Hagar, S Liuni, C Martin, S Miles, R Arthur, MM Feldbush, MW Highfield, DA Hobbins, TE Kurz, R Leviton, SP Libonati, JP Moore, M Perez, E Mills, P Geller, N Hunsberger, S Gold, J Huang, PC Burns, A Caleb, H Cline, DR Harris, S Hockenbrock, R Horney, RA Jadwin, LM King, J Sexton, P Spence, ME Chacon, F Gagne, W Maple, S Martinez, G TI Rationale, design, implementation, and baseline characteristics of patients in the DIG trial: A large, simple, long-term trial to evaluate the effect of digitalis on mortality in heart failure SO CONTROLLED CLINICAL TRIALS LA English DT Article DE design; large simple trial; randomized clinical trial; digoxin; heart failure ID CLINICAL-TRIALS; NEED AB This article provides a detailed overview of the rationale for key aspects of the protocol of the Digitalis Investigation Group (DIG) trial. It also highlights unusual aspects of the study implementation and the baseline characteristics. The DIG trial is a large, simple, international placebo-controlled trial whose primary objective is to determine the effect of digoxin on all cause mortality in patients with clinical heart failure who are in sinus rhythm and whose ejection fraction is less than or equal to 0.45. An ancillary study examines the effect in those with an ejection fraction > 0.45. Key aspects of the trial include the simplicity of the design, broad eligibility criteria, essential data collection, and inclusion of various types of centers. A total of 302 centers in the United States and Canada enrolled 7788 patients between February 1991 and September 1993. Follow-up continued until December 1995 with the results available in Spring 1996. C1 ST JOSEPHS HOSP, TAMPA, FL USA. UNIV NEW MEXICO, SCH MED, ALBUQUERQUE, NM 87131 USA. VAMC, TOPEKA, KS USA. SINAI SAMARITAN MED CTR, MILWAUKEE, WI USA. VAMC, PITTSBURGH, PA USA. VAMC, MINNEAPOLIS, MN USA. VICTORIA HOSP, LONDON, ON N6A 4G5, CANADA. PENTICTON REG HOSP, PENTICTON, BC, CANADA. OTTAWA CIVIC HOSP, OTTAWA, ON K1Y 4E9, CANADA. HOTEL DIEU DELEVIS, QUEBEC CITY, PQ, CANADA. BRIDGEPORT HOSP, BRIDGEPORT, CT USA. SUNNYBROOK HSC, TORONTO, ON, CANADA. GR BAKER MEM HOSP, QUESNEL, BC, CANADA. MERCY MED CTR, BALTIMORE, MD USA. JOHNS HOPKINS MED INST, BALTIMORE, MD 21205 USA. JEWISH HOSP ST LOUIS, ST LOUIS, MO 63110 USA. VAMC, BROOKLYN, NY USA. ST JOSEPH HOSP & HLTH CARE CTR, CHICAGO, IL USA. OROVILLE HOSP, OROVILLE, CA USA. ST JOHNS HOSP, ST JOHN, NB, CANADA. HOP ENFANTS JESUS, QUEBEC CITY, PQ, CANADA. VAMC, LAKE CITY, FL USA. CARDIOL CONSULTANTS, HICKSVILLE, NY USA. ST VINCENTS MED CTR, STATEN ISL, NY USA. USN HOSP, OAKLAND, CA USA. MILTON S HERSHEY MED CTR, HERSHEY, PA USA. HOP SEPT ILES, SEPT ILES, PQ, CANADA. INST CARDIOL MONTREAL, MONTREAL, PQ, CANADA. CTR HOP REG, BAIE COMEAU, PQ, CANADA. CTR HOP, VERDUN, PQ, CANADA. 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COOK CTY HOSP, CHICAGO, IL 60612 USA. VAMC, FT MEADE, SD USA. UNIV OTTAWA, INST HEART, OTTAWA, ON, CANADA. HOP CHICOUTIMI, CHICOUTIMI, PQ, CANADA. ST JOHNS HOSP, TULSA, OK USA. ST PAUL RAMSEY MED CTR, ST PAUL, MN 55101 USA. SPECIALTY MED CLIN, ENCINITAS, CA USA. AUDUBON REG MED CTR, LOUISVILLE, KY USA. TOURO INFIRM, NEW ORLEANS, LA USA. VAMC, CLEVELAND, OH USA. ST PAULS HOSP, VANCOUVER, BC V6Z 1Y6, CANADA. VAMC, LITTLE ROCK, AR USA. PROVIDENCE HOSP, SOUTHFIELD, MI 48037 USA. SINAI HOSP, BALTIMORE, MD 21215 USA. VAMC, BROOKLYN, NY USA. VAMC, FARGO, ND USA. UNIV TENNESSEE, MED CTR, KNOXVILLE, TN USA. EASTERN MAINE MED CTR, BANGOR, ME USA. NO COLORADO MED CTR, GREELEY, CO USA. VAMC, LOS ANGELES, CA USA. ROYAL VICTORIA HOSP, MONTREAL, PQ H3A 1A1, CANADA. FRANCIS SCOTT KEY MED CTR, BALTIMORE, MD 21224 USA. MT AUBURN HOSP, CAMBRIDGE, MA USA. VAMC, NEWINGTON, CT USA. COLCHESTER REG HOSP ANNEX, TRURO, NS, CANADA. UNIV MISSOURI, TRUMAN MED CTR, KANSAS CITY, MO 64108 USA. 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MARSHFIELD CLIN FDN MED RES & EDUC, MARSHFIELD, WI USA. BESS KAISER MED CTR, PORTLAND, OR USA. AURORA COMMUNITY HOSP, AURORA, CO USA. VAMC, MARION, IL USA. VAMC, DAYTON, OH USA. PLAINS HLTH CTR, REGINA, SK, CANADA. ABERDEEN HOSP, NEW GLASGOW, NS, CANADA. ST JOHNS MERCY MED CTR, ST LOUIS, MO 63141 USA. BUFFALO GEN HOSP, BUFFALO, NY 14203 USA. DUNES FAMILY HLTH CARE, REEDSPORT, OR USA. DORNS VET HOSP, COLUMBIA, SC USA. S SHORE REG HOSP, BRIDGEWATER, MA USA. ST JOSEPH MERCY HOSP, PONTIAC, MI USA. AKRON GEN MED CTR, AKRON, OH USA. BAY DE NOC FAMILY HLTH CTR, ESCANABA, MI USA. QUEEN ELIZABETH HOSP, CHARLOTTETOWN, PE, CANADA. UNIV ALBERTA, EDMONTON, AB, CANADA. CLEVELAND CLIN, CLEVELAND, OH 44106 USA. HOP GEN JUIF SIR MORTIMER B DAVIS, MONTREAL, PQ, CANADA. NANAIMO REG GEN HOSP, NAINAMO, BC, CANADA. UNIV COLORADO, HLTH SCI CTR, DENVER, CO USA. LAKESIDE VAMC, CHICAGO, IL USA. FLUSHING HOSP & MED CTR, FLUSHING, NY USA. VAMC, TUSCALOOSA, AL USA. ROYAL ALEXANDRA HOSP, EDMONTON, AB, CANADA. 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MAYO CLIN, SCOTTSDALE, AZ USA. HOP NOTRE DAME DE BON SECOURS, MONTREAL, PQ H2L 4K8, CANADA. INVASCOR, LONGUEUIL, PQ, CANADA. UNIV SHERBROOKE, CTR HOP, SHERBROOKE, PQ J1K 2R1, CANADA. SYDENHAM DIST HOP, WALLACEBURG, ON, CANADA. HOP CHICOUTIMI, CHICOUTIMI, PQ, CANADA. SACRED HEART HOSP & REHABIL CTR, NORRISTOWN, PA USA. VAMC, DES MOINES, IA USA. MT SINAI HOSP MED CTR, CHICAGO, IL USA. OUR LADY MERCY MED CTR, BRONX, NY USA. SAN JUAN CITY HOSP, RIO PIEDRAS, PR USA. VAMC, SALEM, VA USA. WILLIAMS FAMILY MED CTR, DENVER, CO USA. HANTS COMMUNITY HOSP, WINDSOR, NS, CANADA. ST JOHNS QUEENS HOSP, ELMHURST, NY USA. UNIV CALGARY, FOOTHILLS PROV GEN HOSP, CALGARY, AB, CANADA. VAMC, NORTHPORT, NY USA. ST JOHNS HOSP, ST JOHN, NB, CANADA. DULUTH CLIN, DULUTH, MN USA. COOK CTY HOSP, CHICAGO, IL 60612 USA. PROVIDENCE MED CTR, PORTLAND, OR USA. VAMC, BROCKTON, MA USA. DUNES FAMILY HLTH CARE, REEDSPORT, OR USA. HOTEL DIEU ARTHABASKA, ARTHABASKA, PQ, CANADA. UNIV FLORIDA, HLTH SCI CTR, JACKSONVILLE, FL 32209 USA. CARLETON MEM HOSP, WOODSTOCK, NB, CANADA. VANCOUVER HOSP & HSC, VANCOUVER, BC, CANADA. VAMC, RICHMOND, VA USA. CREIGHTON UNIV, CARDIAC CTR, OMAHA, NE 68178 USA. VAMC, HOUSTON, TX USA. VAMC, SYRACUSE, NY USA. ST BONIFACE GEN HOSP, WINNIPEG, MB R2H 2A6, CANADA. LEHIGH VALLEY HOSP, ALLENTOWN, PA USA. N SHORE U HOSP, MANHASSET, NY USA. VAMC, ALLEN PK, MI USA. MARY IMOGENE BASSETT HOSP, COOPERSTOWN, NY 13326 USA. COFFEE REG HOSP, DOUGLAS, GA USA. SUDBURY MEM HOSP, SUDBURY, ON, CANADA. ST VINCENTS MED CTR, JACKSONVILLE, FL USA. CHELSEA COMMUNITY HOSP, CHELSEA, MI USA. VALLEY REG HOSP, HUNTSVILLE, NS, CANADA. VAMC, WILKES BARRE, PA USA. VAMC, ASHEVILLE, NC USA. ROCHESTER GEN HOSP, ROCHESTER, NY 14621 USA. UMDNJ, AMBULATORY HLTH CARE CTR, STRATFORD, NJ USA. UNIV TEXAS, CTR HLTH, TYLER, TX 75710 USA. VAMC, MINNEAPOLIS, MN USA. SO CALIF CARDIOL, SAN DIEGO, CA USA. CAPE FEAR VALLEY MED CTR, FAYETTEVILLE, AR USA. HOSP ST SACREMENT, QUEBEC CITY, PQ, CANADA. IOWA HEART CTR, DES MOINES, IA USA. CTR HOSP REG AMIANTE, THETFORD MINES, PQ, CANADA. UNIV BRITISH COLUMBIA, VANCOUVER, BC V5Z 1M9, CANADA. GUELPH CARDIOL ASSOCIATES, GUELPH, ON, CANADA. HESS MEM HOSP, MILE BLUFF CLIN, MAUSTON, WI USA. VAMC, NEWINGTON, CT USA. AKRON CITY HOSP, AKRON, OH USA. VAMC, BUTLER, PA USA. VAMC, MEMPHIS, TN USA. GRIFFIN HOSP, DERBY, CT USA. GRANDIN MED CTR, ST ALBERT, AB, CANADA. VAMC, TUSKEGEE, AL USA. ROYAL INLAND HOSP, KAMLOOPS, BC, CANADA. RAVENSWOOD HOSP, MED CTR, CHICAGO, IL USA. VAMC, BATTLE CREEK, MI USA. LINCOLN MED & MENTAL HLTH CTR, BRONX, NY 10451 USA. HOSP ST LUC, MONTREAL, PQ, CANADA. USN HOSP, OAKLAND, CA USA. MONCTON MED CLIN, MONCTON, NB, CANADA. ST MARYS HOSP, DECATUR, IL USA. CALGARY GEN HOSP, CALGARY, AB, CANADA. UNIV COLORADO, HLTH SCI CTR, DENVER, CO USA. HOSP GOOD SAMARITAN, BALTIMORE, MD USA. UNIV SO CALIF, RANCHO LOS AMIGOS MED CTR, DOWNEY, CA 90242 USA. LAHEY CLIN MED CTR, BURLINGTON, MA 01803 USA. PLYMOUTH FAMILY PHYSICIANS, PLYMOUTH, WI USA. EAGLE MED, EXCELSIOR, MN USA. WASHINGTON HOSP CTR, WASHINGTON, DC 20010 USA. VAMC, TUSCALOOSA, AL USA. BAY MED CTR, BAY CITY, MI USA. MIDW CTR HEART FAILURE, LOMBARD, IL USA. HOP CHRIST ROI, VANIER, PQ, CANADA. VAMC, LOS ANGELES, CA USA. CARDIOVASC ASSOCIATES, LANCASTER, PA USA. MERCY HOSP ANDERSON, CINCINNATI, OH USA. HENRY FORD HOSP, DETROIT, MI 48202 USA. ST JOSEPHS HLTH CTR, LONDON, ON, CANADA. VAMC, AUGUSTA, GA USA. CTR HOP ST GEORGES DE BEAUCE, ST GEORGES OUEST, PQ, CANADA. CHRISTIANA HOSP, MED CTR DELAWARE, NEWARK, DE USA. SULLIVAN CARDIOL ASSOCIATES, HAMILTON, ON, CANADA. EASTERN MAINE MED CTR, BANGOR, ME USA. GEN HOSP CORP, HSC, ST JOHN, NF, CANADA. ST PAUL RAMSEY MED CTR, ST PAUL, MN 55101 USA. NO ALBERTA CARDIAC REHABIL INST, EDMONTON, AB, CANADA. CTR HOP REG, BAIE COMEAU, PQ, CANADA. VAMC, ROSEBURG, OR USA. ST JOSEPHS HOSP, HAMILTON, ON, CANADA. UNIV ALBERTA, EDMONTON, AB, CANADA. UNIV OKLAHOMA, HLTH SCI CTR, VAMC, OKLAHOMA CITY, OK USA. VAMC, CLARKSBURG, MD USA. BEAUMONT HOSP, ROYAL OAK, MI USA. HILLSBORO CARDIOL, HILLSBORO, OR USA. ROYAL COLUMBIAN HOSP, NEW WESTMINSTER, BC, CANADA. SINAI HOSP, BALTIMORE, MD 21215 USA. COLUMBIA UNIV COLL PHYS & SURG, HARLEM HOSP CTR, NEW YORK, NY 10032 USA. WASHINGTON HOSP CTR, WASHINGTON, DC 20010 USA. ALTON OCHSNER MED FDN & OCHSNER CLIN, NEW ORLEANS, LA 70121 USA. CAMBRIDGE MEM HOSP, CAMBRIDGE, ON, CANADA. TRAIL REG HOSP, TRAIL, BC, CANADA. UNIV LOUISVILLE, VAMC, LOUISVILLE, KY 40292 USA. FT WILLIAM CLIN, THUNDER BAY, ON, CANADA. JAMAICA HOSP, JAMAICA, NY USA. JEWISH HOSP HEART & LUNG INST, LOUISVILLE, KY USA. ANDROSCOGGIN CARDIOL ASSOCIATES, AUBURN, AL USA. OTTAWA GEN HOSP, OTTAWA, ON K1H 8L6, CANADA. BURNS CLIN MED CTR, PETOSKEY, MI USA. EDMONTON GEN HOSP, EDMONTON, AB, CANADA. SINAI SAMARITAN MED CTR, MILWAUKEE, WI USA. METHODIST HOSP, HOUSTON, TX 77030 USA. FAMILY MED ASSOCIATES, RICHBURG, SC USA. UNIV ILLINOIS, CHICAGO, IL USA. PENN HOSP, PHILADELPHIA, PA 19107 USA. COMMUNITY HOSP, INDIANAPOLIS, IN USA. JAMES A HALEY VET HOSP, TAMPA, FL 33612 USA. FLUSHING HOSP & MED CTR, FLUSHING, NY USA. MT SINAI HOSP, NEW YORK, NY 10029 USA. JOHN RADCLIFFE HOSP, OXFORD OX3 9DU, ENGLAND. VAMC, BOSTON, MA USA. VAMC, MINNEAPOLIS, MN USA. HARVARD UNIV, BOSTON, MA 02115 USA. BAIRUM HOSP, SANDVIKA, NORWAY. BRIGHAM & WOMENS HOSP, BOSTON, MA 02115 USA. IST M NEGRI, MILAN, ITALY. VAMC, COORD CTR, PERRY POINT, MD USA. VA CLIN RES PHARM COORD CTR, ALBUQUERQUE, NM USA. BURROUGHS WELLCOME CO, RES TRIANGLE PK, NC 27709 USA. NHLBI, CLIN TRIALS BRANCH, PROJECT OFF, BETHESDA, MD 20892 USA. UNIV ALBERTA HOSP, EDMONTON, AB T6G 2B7, CANADA. HAMILTON GEN HOSP, HAMILTON, ON, CANADA. OREGON HLTH SCI UNIV, PORTLAND, OR 97201 USA. BAYLOR COLL MED, HOUSTON, TX 77030 USA. HAMILTON CIV HOSP, RES CTR, HAMILTON, ON, CANADA. UNIV MICHIGAN, SCH MED, ANN ARBOR, MI USA. HARTFORD HOSP, HARTFORD, CT 06115 USA. RI Tsuyuki, Ross/E-2462-2016; Effron, Mark/P-9300-2015 OI Tsuyuki, Ross/0000-0002-3724-598X; NR 27 TC 65 Z9 66 U1 0 U2 6 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0197-2456 EI 1879-050X J9 CONTROL CLIN TRIALS JI Controlled Clin. Trials PD FEB PY 1996 VL 17 IS 1 BP 77 EP 97 PG 21 WC Medicine, Research & Experimental; Pharmacology & Pharmacy SC Research & Experimental Medicine; Pharmacology & Pharmacy GA UA398 UT WOS:A1996UA39800009 ER PT J AU Rollwagen, FM Li, YY Pacheco, ND Nielsen, TB AF Rollwagen, FM Li, YY Pacheco, ND Nielsen, TB TI Systemic bacteraemia following haemorrhagic shock in mice: Alleviation with oral interleukin 6 SO CYTOKINE LA English DT Article DE cytokine; haemorrhage; Il-6; oral administration; shock ID HEMORRHAGIC-SHOCK; BACTERIAL TRANSLOCATION; INTERFERON; IMMUNOSUPPRESSION; MACROPHAGE; PERITONEAL; CULTURE; ALPHA; GUT AB A murine model of haemorrhagic shock was used to investigate bacterial translocation from the gut and subsequent systemic immunoreduction. Anaesthetized mice were bled from the femoral artery, and held at a mean arterial blood pressure of 35 mm Hg for one hour then resuscitated,vith shed blood and two-fold volume lactated Ringer's solution. Upon awakening, they were given cytokines or control media orally, Bacteriological cultures of livers, spleens and mesenteric lymph nodes from haemorrhaged mice given cytokine had significantly fewer bacteria/gm of tissue than those given media, Recombinant IL-6 mimicked the effects seen with crude cytokines, Reduction of proliferation among spleen cells from haemorrhaged mice was observed and could be partially returned to normal by cytokine feeding, Mixing experiments in which cells from haemorrhaged mice were added to those of normal mice in an MLR showed no suppressor activity, Flow cytometry analysis revealed a reduction in CD 3+ cells at 16 hours post-haemorrhage in mice fed control media or cytokines, suggesting that reduced proliferative capacity may be due to loss of function rather than active suppression, Histological examination of the intestines of haemorrhaged mice fed cytokines or media revealed restoration of intestinal mucosal integrity by cytokine administration, These results suggest that oral administration of IL-6 may be an important treatment for the prevention of systemic sepsis following haemorrhage. (C) 1996 Academic Press Limited C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. RP Rollwagen, FM (reprint author), USN,MED RES INST,WOUND REPAIR ENHANCEMENT PROGRAM,8901 WISCONSIN AVE,BETHESDA,MD 20889, USA. NR 32 TC 24 Z9 24 U1 0 U2 2 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 1043-4666 J9 CYTOKINE JI Cytokine PD FEB PY 1996 VL 8 IS 2 BP 121 EP 129 DI 10.1006/cyto.1996.0017 PG 9 WC Biochemistry & Molecular Biology; Cell Biology; Immunology SC Biochemistry & Molecular Biology; Cell Biology; Immunology GA TW812 UT WOS:A1996TW81200003 PM 8777269 ER PT J AU Wu, C Chen, LG Sun, FR AF Wu, C Chen, LG Sun, FR TI Performance of a regenerative Brayton heat engine SO ENERGY LA English DT Article ID POWER; EFFICIENCY; OUTPUT AB The performance of an endoreversible regenerative Brayton heat engine has been studied. The analysis is focused on minimizing irreversibilities associated with the hot and cold heat exchangers and regenerator. C1 USN ACAD ENGN,FAC 306,WUHAN 430033,PEOPLES R CHINA. RP Wu, C (reprint author), USN ACAD,DEPT MECH ENGN,ANNAPOLIS,MD 21402, USA. NR 5 TC 55 Z9 59 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-5442 J9 ENERGY JI Energy PD FEB PY 1996 VL 21 IS 2 BP 71 EP 76 DI 10.1016/0360-5442(95)00097-6 PG 6 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA TQ826 UT WOS:A1996TQ82600001 ER PT J AU Rollwagen, FM Gafney, WCM Pacheco, ND Davis, TA Hickey, TM Nielsen, TB Rudolph, AS AF Rollwagen, FM Gafney, WCM Pacheco, ND Davis, TA Hickey, TM Nielsen, TB Rudolph, AS TI Multiple responses to administration of liposome-encapsulated hemoglobin (LEH): Effects on hematopoiesis and serum IL-6 levels SO EXPERIMENTAL HEMATOLOGY LA English DT Article DE liposome encapsulated hemoglobin; blood substitute; interleukin 6; hematopoiesis ID INTERLEUKIN-6 PRODUCTION; SYNTHETIC ERYTHROCYTES; BIOLOGICAL RESPONSES; CYTOKINE RELEASE; INHIBITION; CELLS; BIODISTRIBUTION; DIFFERENTIATION; PENTOXIFYLLINE; PROLIFERATION AB Liposome-encapsulated hemoglobin (LEH) has been tested in animals as an oxygen-carrying red cell substitute and has been shown to be beneficial in the treatment of hemorrhagic shock. The effects of LEH on immune responses have not been studied thoroughly in any well-controlled model. Using a murine model, we evaluated nephrotoxicity and hepatotoxicity as well as immune function parameters following LEH administration. Following intravenous administration of LEH, 1) a serum spike of interleukin-6 (IL-6) occurred in mice at 4-8 hours, with no elevation of IL-1, tumor necrosis factor (TNF), or interferon-gamma (IFN-gamma); 2) the serum liver function enzymes SCOT (AST, aspartate aminotransferase) and SGPT (ALT, alanine aminotransferase) were elevated at 48 hours; 3) only a slight increase in serum antibody to bovine hemoglobin was observed; and 4) increased hematopoietic activity was observed in the spleen and bone marrow. The finding that only IL-6 but not the associated TNF, IL-1, or IFN-gamma is secreted in vivo following LEH administration is novel and may have significance in defining the mechanisms underlying specific adverse responses observed with LEH administration in animals. C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. USN,RES LAB,WASHINGTON,DC 20375. RP Rollwagen, FM (reprint author), USN,MED RES INST,WREP,CODE 063,BETHESDA,MD 20889, USA. NR 44 TC 17 Z9 18 U1 0 U2 0 PU CARDEN JENNINGS PUBL CO LTD PI CHARLOTTESVILLE PA BLAKE CTR, STE 200, 1224 W MAIN ST, CHARLOTTESVILLE, VA 22903 SN 0301-472X J9 EXP HEMATOL JI Exp. Hematol. PD FEB PY 1996 VL 24 IS 3 BP 429 EP 436 PG 8 WC Hematology; Medicine, Research & Experimental SC Hematology; Research & Experimental Medicine GA UA024 UT WOS:A1996UA02400005 PM 8599972 ER PT J AU Lee, DC AF Lee, DC TI Worst-case fraction of CBR teletraffic unpunctual due to statistical multiplexing SO IEEE-ACM TRANSACTIONS ON NETWORKING LA English DT Article AB This paper quantitatively analyzes the queueing delay of the constant-bit-rate (CBR) traffic in a multiplexer, where the CBR traffic is mixed with the traffic of another session (interfering traffic) that has throughput and burstiness constraints. This paper focuses as a quality-of-service (QoS) measure on the fraction of the CBR traffic that fails to meet a certain delay requirement. Results include the worst-case QoS of CBR traffic as a function of the throughput and burstiness parameters imposed on the interfering traffic. Results of this paper can be applied to traffic management and call processing of asynchronous transfer mode (ATM) networks. RP Lee, DC (reprint author), USN,RES LAB,CODE 8141,WASHINGTON,DC 20375, USA. NR 6 TC 4 Z9 5 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1063-6692 J9 IEEE ACM T NETWORK JI IEEE-ACM Trans. Netw. PD FEB PY 1996 VL 4 IS 1 BP 98 EP 105 DI 10.1109/90.503765 PG 8 WC Computer Science, Hardware & Architecture; Computer Science, Theory & Methods; Engineering, Electrical & Electronic; Telecommunications SC Computer Science; Engineering; Telecommunications GA TY253 UT WOS:A1996TY25300009 ER PT J AU Overfelt, PL AF Overfelt, PL TI Near fields of the constant current thin circular loop antenna of arbitrary radius SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Article AB Assuming a known (constant) current distribution on the thin circular loop antenna of arbitrary radius in free space, an exact integration of the vector potential is performed without recourse to approximations. The only restrictions on the solution variables are that the observation point distance must be greater than the loop radius and that the polar angle must run between 0 and pi. The resulting vector potential infinite series solution possesses a real part composed of linear combinations of complete elliptic integrals of the first and second kind and an imaginary part composed of elementary functions. Thus, it is possible to obtain an exact solution which is valid everywhere that r > a and 0 less than or equal to theta less than or equal to pi. The electromagnetic field components of the constant current circular loop antenna are then determined by direct series differentiation. These solutions are valid in the near and induction fields, converging rapidly there, and are also valid in the far field, although many terms of the series are needed for convergence. RP Overfelt, PL (reprint author), USN,AIR WARFARE CTR,RES & TECHNOL DIV,PHYS BRANCH,WEAP DIV,CHINA LAKE,CA 93555, USA. NR 22 TC 34 Z9 34 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-926X J9 IEEE T ANTENN PROPAG JI IEEE Trans. Antennas Propag. PD FEB PY 1996 VL 44 IS 2 BP 166 EP 171 DI 10.1109/8.481643 PG 6 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA TV808 UT WOS:A1996TV80800005 ER PT J AU Jenn, DC Flokas, V AF Jenn, DC Flokas, V TI In-band scattering from arrays with parallel feed networks SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Article ID MICROSTRIP PATCH AB Approximate closed-form expressions are derived for in-band scattering from an array antenna with parallel (corporate) feed networks. Multiple reflections are neglected and feed devices of the same type are assumed to have identical electrical characteristics. The model is shown to be in good agreement with results generated using a scattering matrix formulation. Based on computed data, the characteristics of array scattering are discussed. RP Jenn, DC (reprint author), USN,POSTGRAD SCH,MONTEREY,CA 93943, USA. NR 13 TC 9 Z9 10 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-926X J9 IEEE T ANTENN PROPAG JI IEEE Trans. Antennas Propag. PD FEB PY 1996 VL 44 IS 2 BP 172 EP 178 DI 10.1109/8.481644 PG 7 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA TV808 UT WOS:A1996TV80800006 ER PT J AU Woolard, DL Buot, FA Rhodes, DL Lu, XJ Perlman, BS AF Woolard, DL Buot, FA Rhodes, DL Lu, XJ Perlman, BS TI An assessment of potential nonlinear circuit models for the characterization of resonant tunneling diodes SO IEEE TRANSACTIONS ON ELECTRON DEVICES LA English DT Article ID MAXIMUM OSCILLATION FREQUENCY; INTRINSIC BISTABILITY; STATE LIFETIME; DEVICES; SIMULATION; GHZ AB The intrinsically fast process of resonant tunneling through double barrier heterostructures along with the existence of negative differential resistance in the current-voltage characteristic of these structures has led to their implementation as sources for high frequency electromagnetic energy. While sources based upon resonant tunneling diodes (RTD's) have produced frequency of oscillations up to 712 GHz, only microwatt levels of performance has been achieved above 100 GHz, Since stability criteria play a critical role in determining the deliverable power of any oscillator, a physically accurate equivalent-circuit model for the RTD is extremely important for optimizing the dynamics of the device-cavity package, This study identifies a distinctly new equivalent circuit model for characterizing the modes of oscillation in RTD-based sources. Specifically, in order to exhibit the fundamental seif-oscillations and the overall IV characteristics (plateau structure and hysteresis) observed experimentally, an accurate circuit model of the RTD must incorporate; (i) a quantum-wed inductance which directly chokes the nonlinear conductance and, (ii) a nonlinear access resistance, associated with the accumulation of charge in the injection region of the double barriers, with a nonlocal dependence on the bias across the double barrier structure. C1 USN,RES LAB,WASHINGTON,DC 20375. RP Woolard, DL (reprint author), USA,RES LAB,PSD,FT MONMOUTH,NJ 07703, USA. NR 32 TC 7 Z9 8 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9383 J9 IEEE T ELECTRON DEV JI IEEE Trans. Electron Devices PD FEB PY 1996 VL 43 IS 2 BP 332 EP 341 DI 10.1109/16.481736 PG 10 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA TU665 UT WOS:A1996TU66500020 ER PT J AU Voelker, RH Frankel, MY Sentelle, CG AF Voelker, RH Frankel, MY Sentelle, CG TI Study and characterization of optoelectronic photoconductor-based probes SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES LA English DT Article ID TRANSMISSION-LINES; SWITCHES AB Photoconductor sampling probes are important for optoelectronic device and circuit measurement applications. We use the finite-difference transmission line matrix (FD-TLM) method to characterize the ultrafast photoconductor sampling probes' fundamental performance limits imposed by electromagnetic constraints. Both on-wafer and free-standing photoconductor probes are investigated as applied to microstrip lines found in millimeter-wave integrated circuits and as applied to coplanar strip lines found in ultrafast device characterization systems. Localized invasiveness, distributed loading, and measurement accuracy are investigated for various probing configurations and orientations. Localized invasiveness is small for all our simulations. Distributed loading is negligible for cases where the guided-mode field confinement is tighter than the spatial separation between the probe support structure and the transmission line. Measurement accuracy is acceptable for simulated structures, but amplitude calibration precision may be compromised. We also study photoconductor probes for high-bandwidth signal generation on transmission line structures. The generated signals follow the photoconductor switch photocurrent signal for cases where both the probe and the transmission line form well-matched guiding-wave structures but are attenuated and distorted for other cases. C1 UNIV NEBRASKA,CTR ELECTROOPT,LINCOLN,NE 68588. USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375. RP Voelker, RH (reprint author), UNIV NEBRASKA,DEPT ELECT ENGN,LINCOLN,NE 68588, USA. NR 18 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9480 J9 IEEE T MICROW THEORY JI IEEE Trans. Microw. Theory Tech. PD FEB PY 1996 VL 44 IS 2 BP 331 EP 337 DI 10.1109/22.481584 PG 7 WC Engineering, Electrical & Electronic SC Engineering GA TW129 UT WOS:A1996TW12900020 ER PT J AU Douglass, SR Eddy, C Weber, BV AF Douglass, SR Eddy, C Weber, BV TI Faraday rotation of microwave fields in an electron cyclotron resonance plasma SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID POWER AB An electron cyclotron resonance (ECR) plasma is created with 2.45-GHz linearly polarized microwaves, which propagate in the direction of the magnetic field. Measurements of the relative power and polarization angle versus z have been made within the first few centimeters of the quartz entry window, As the microwave electric field enters the plasma, it rotates while becoming elliptically polarized then circularly polarized. The rotation angle versus z and the component of the microwave field along the major axis of the polarization ellipse versus z are explained by cold plasma dispersion theory. C1 USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,WASHINGTON,DC 20375. RP Douglass, SR (reprint author), USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375, USA. NR 2 TC 7 Z9 7 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0093-3813 J9 IEEE T PLASMA SCI JI IEEE Trans. Plasma Sci. PD FEB PY 1996 VL 24 IS 1 BP 16 EP 17 DI 10.1109/27.491668 PG 2 WC Physics, Fluids & Plasmas SC Physics GA UE718 UT WOS:A1996UE71800007 ER PT J AU Manka, C Grun, J Stamper, J Resnick, J Burris, R Crawford, J Ripin, BH AF Manka, C Grun, J Stamper, J Resnick, J Burris, R Crawford, J Ripin, BH TI Images of unstable Taylor-Sedov blast waves propagating through a uniform gas SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID INSTABILITIES; SUPERNOVA AB We present images from the first observation and measurements of an instability in Taylor-Sedov blast waves propagating through a uniform background gas [1]. The instability occurs when the adiabatic index of the background gas is low, Images of the expanding blast waves are dark field shadowgraphs obtained using a frequency-doubled (527 nm) pulsed YAG laser and black and white photographic film. The film images are digitized, and image processing routines are used for analysis and presentation. C1 PHYS SCI INC,ALEXANDRIA,VA 23701. SW TEXAS STATE UNIV,DEPT PHYS,SAN MARCOS,TX 78666. AMER PHYS SOC,COLLEGE PK,MD 20740. RP Manka, C (reprint author), USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375, USA. NR 13 TC 1 Z9 1 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0093-3813 J9 IEEE T PLASMA SCI JI IEEE Trans. Plasma Sci. PD FEB PY 1996 VL 24 IS 1 BP 35 EP 36 DI 10.1109/27.491678 PG 2 WC Physics, Fluids & Plasmas SC Physics GA UE718 UT WOS:A1996UE71800017 ER PT J AU Toyooka, K Maruo, S Iwahori, T Yamamoto, N Tai, XG Abe, R Takahama, Y Murakami, M Uede, T Hamaoka, T Fujiwara, H AF Toyooka, K Maruo, S Iwahori, T Yamamoto, N Tai, XG Abe, R Takahama, Y Murakami, M Uede, T Hamaoka, T Fujiwara, H TI CD28 co-stimulatory signals induce IL-2 receptor expression on antigen-stimulated virgin T cells by an IL-2-independent mechanism SO INTERNATIONAL IMMUNOLOGY LA English DT Article DE antigen-presenting cell; CD28 molecule; co-stimulatory signal; IL-2 receptor; tolerance ID CLONAL ANERGY; COSTIMULATORY SIGNAL; LYMPHOCYTES-T; B-CELLS; INTERLEUKIN-2 PRODUCTION; TOLERANCE INDUCTION; ACTIVATION PATHWAY; PRESENTING CELLS; COUNTER-RECEPTOR; LIGAND B7/BB1 AB Intravenous sensitization of C57BL/6 (B6) mice with class II H-2-disparate B6-C-H-2(bm12) (bm12) resting B cells induced anti-bm12 CD4(+) T cell tolerance as shown by hyporesponsiveness in the anti-bm12 mixed lymphocyte reaction (MLR). The present study investigated the mechanism(s) of the failure of bm12 B cells to stimulate the proliferation of B6 anti-bm12 CD4(+) T cells. While stimulation in vitro of B6 splenic T cells with bm12 antigen-presenting cells (APC) induced IL-2 mRNA expression and IL-2 production, T cells stimulated with bm12 B cells expressed much less IL-2 mRNA and secreted very low but detectable levels of IL-2. Moreover, the T cells stimulated with the bm12 B cells did not proliferate and this was not corrected by the addition of rIL-2. These results suggest that T cells stimulated with bm12 B cells fail to generate IL-2 responsiveness. Further, whereas IL-2 receptor (IL-2R) alpha chain expression was significantly induced on B6 T cells stimulated with bm12 APC; stimulation with bm12 B cells did not induce IL-2R expression over background levels. However, virgin T cells stimulated with both bm12 B cells and anti-CD28 mAb proliferated and displayed a dramatic increase in IL-2 production as well as IL-2R expression to levels commensurate with those resulting from bm12 APC stimulation. IL-2R expression was induced by stimulation with bm12 APC or bm12 B cells plus anti-CD28 mAb even in the presence of sufficient amounts of anti-IL-2 mAb for neutralizing produced IL-2; while levels of IL-2R were significantly lower compared to those induced in the absence of anti-IL-2 mAb, increased frequencies of IL-2R(+) cells were comparable. Conversely, IL-2R was not induced by bm12 B cell stimulation in the presence of IL-2. Moreover, IL-2R expression and proliferation induced by stimulation with bm12 APC was inhibited by CTLA-4-Ig, a soluble recombinant fusion protein capable of blocking the CD28 co-stimulatory pathway. Thus, these results indicate that the failure of resting B cells to induce full activation of alloreactive virgin T cells is due to ineffective CD28 co-stimulation and that the CD28 co-stimulatory signals not only stimulate IL-2 production but also induce IL-2R expression by an IL-2-independent mechanism. C1 OSAKA UNIV,SCH MED,BIOMED RES CTR,SUITA,OSAKA 565,JAPAN. USN,MED RES INST,IMMUNE CELL BIOL PROGRAM,BETHESDA,MD 20889. SYNTEX INST IMMUNOL,IBARAKI,OSAKA 30041,JAPAN. HOKKAIDO UNIV,INST IMMUNOL SCI,SAPPORO,HOKKAIDO 060,JAPAN. RI Takahama, Yousuke/A-5863-2010; Maruo, Seiji/A-4288-2012 NR 51 TC 20 Z9 20 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0953-8178 J9 INT IMMUNOL JI Int. Immunol. PD FEB PY 1996 VL 8 IS 2 BP 159 EP 169 DI 10.1093/intimm/8.2.159 PG 11 WC Immunology SC Immunology GA TW657 UT WOS:A1996TW65700001 PM 8671600 ER PT J AU Chawla, KK Liaw, PK Fishman, SG AF Chawla, KK Liaw, PK Fishman, SG TI High-performance composites: Commonalty of phenomena SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Editorial Material C1 UNIV TENNESSEE,COLL ENGN,DEPT MAT SCI & ENGN,KNOXVILLE,TN. OFF NAVAL RES,ARLINGTON,VA 22217. RP Chawla, KK (reprint author), NEW MEXICO INST MIN & TECHNOL,DEPT MAT & MET ENGN,SOCORRO,NM 87801, USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD FEB PY 1996 VL 48 IS 2 BP 43 EP 44 PG 2 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA TT659 UT WOS:A1996TT65900008 ER PT J AU McNelley, TR McMahon, ME AF McNelley, TR McMahon, ME TI Analyzing superplastic microstructures using interactive EBSP methods SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Article ID AL-10MG-0.1ZR ALLOY; RECRYSTALLIZATION AB Microtexture ann boundary characteristics have been analyzed in a comparative study of post-deformation tensile specimens of a superplastically processed Al-10Mg-0.1Zr alloy using electron backscatter pattern methods in the scanning electron microscope. Interactive methods cere employed to capture nearest-neighbor (sub)grain diffraction patterns and the data mere subsequently computer analyzed to produce information on the character of the interfacial boundary represented by the misorientation between neighboring crystals. The data from this study are used to determine whether grain boundary character is a microstructural feature responsible for the distinctly different tensile behavior observed in material processed according to two different thermomechanical processing schedules. RP McNelley, TR (reprint author), USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93940, USA. NR 9 TC 5 Z9 5 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD FEB PY 1996 VL 48 IS 2 BP 58 EP 60 PG 3 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA TT659 UT WOS:A1996TT65900012 ER PT J AU Woolard, DL Buot, FA Rhodes, DL Lu, XJ Lux, RA Perlman, BS AF Woolard, DL Buot, FA Rhodes, DL Lu, XJ Lux, RA Perlman, BS TI On the different physical roles of hysteresis and intrinsic oscillations in resonant tunneling structures SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID DOUBLE-BARRIER STRUCTURES; BISTABILITY; DEVICES; SIMULATION; LIFETIME; DIODES AB Electronic sources based upon resonant tunneling diodes (RTDs) usually generate power by establishing limit cycles which exchange energy with storage elements in an external biasing circuit; hence, the output power in this type of implementation will always be limited by extrinsic effects. We verify the presence of multiple energy-storage mechanisms solely within the RTD and characterizes the interdependencies necessary to induce intrinsic oscillations observed in quantum mechanical simulations. Specifically, we show that a nonlinear ''access'' resistance and quantum-well inductance is responsible for the hysteresis, ''plateaulike'' behavior, and bistability associated with the intrinsic current-voltage (I-V) characteristic. Furthermore, a new circuit-level representation which accurately incorporates the nonlinear dependencies into these heretofore ''linear'' equivalent-circuit elements is used to demonstrate the different roles, as well as the degree of cooperative interplay, of the intrinsic oscillations and hysteresis in determining the overall I-V characteristics of the RTD. C1 USN,RES LAB,WASHINGTON,DC 20375. RP Woolard, DL (reprint author), USA,RES LAB,PSD,FT MONMOUTH,NJ 07703, USA. NR 29 TC 16 Z9 16 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD FEB 1 PY 1996 VL 79 IS 3 BP 1515 EP 1525 DI 10.1063/1.360994 PG 11 WC Physics, Applied SC Physics GA TT922 UT WOS:A1996TT92200045 ER PT J AU Fleetwood, DM Saks, NS AF Fleetwood, DM Saks, NS TI Oxide, interface, and border traps in thermal, N2O, and N2O-nitrided oxides SO JOURNAL OF APPLIED PHYSICS LA English DT Review ID REOXIDIZED NITRIDED-OXIDE; STIMULATED CURRENT MEASUREMENTS; POSITIVE CHARGE GENERATION; IRRADIATED MOS DEVICES; SEMICONDUCTOR CAPACITORS; SILICON DIOXIDE; ENERGY-DISTRIBUTION; GATE DIELECTRICS; THIN OXIDES; HOLE TRAPS AB We have combined thermally stimulated-current (TSC) and capacitance-voltage (C-V) measurements to estimate oxide, interface, and effective border trap densities in 6-23 nm thermal, N2O, and N2O-nitrided oxides exposed to ionizing radiation or high-field electron injection. Defect densities depend strongly on oxide processing, but radiation exposure and moderate high-field stress lead to similar trapped hole peak thermal energy distributions (between similar to 1.7 and similar to 2.0 eV) for all processes. This suggests that similar defects dominate the oxide charge trapping properties in these devices. Radiation-induced hole and interface trap generation efficiencies (0.1%-1%) in the best N2O and N2O-nitrided oxides are comparable to the best radiation hardened oxides in the literature. After similar to 10 Mrad(SiO2) x-ray irradiation or similar to 10 mC/cm(2) constant current Fowler-Nordheim injection, effective border trap densities as high as similar to 5X10(11) cm(-2) cm are inferred from C-V hysteresis. These measurements suggest irradiation and high-field stress cause similar border trap energy distributions. In each case, even higher densities of compensating trapped electrons in the oxides (up to 2X10(12) cm(-2)) are inferred from combined TSC and C-V measurements. These trapped electrons prevent conventional C-V methods from providing accurate estimates of the total oxide trap charge density in many irradiation or high-field stress studies. Fewer compensating electrons per trapped hole (similar to 26%+/-5%) are found for irradiation of N2O and N2O-nitrided oxides than for thermal oxides (similar to 46%+/-7%). More compensating electrons are also found for high-field electron injection than radiation exposure, emphasizing the significance of border traps to metal-oxide-semiconductor long term reliability. The primary effect of nitrogen on charge trapping in these oxides appears to be improvement of the near interfacial oxide in which border traps are found. C1 USN,RES LAB,WASHINGTON,DC 20375. RP Fleetwood, DM (reprint author), SANDIA NATL LABS,DEPT 1332,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 112 TC 117 Z9 118 U1 1 U2 32 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD FEB 1 PY 1996 VL 79 IS 3 BP 1583 EP 1594 DI 10.1063/1.361002 PG 12 WC Physics, Applied SC Physics GA TT922 UT WOS:A1996TT92200054 ER PT J AU Gruber, JB Morrison, CA Seltzer, MD Wright, AO Nadler, MP Allik, TH Hutchinson, JA Chai, BHT AF Gruber, JB Morrison, CA Seltzer, MD Wright, AO Nadler, MP Allik, TH Hutchinson, JA Chai, BHT TI Site-selective excitation and polarized absorption spectra of Nd3+ in Sr-5(PO4)(3)F and Ca-5(PO4)(3)F SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CRYSTAL-FIELD ANALYSIS; RARE-EARTH IONS; OPTICAL-SPECTRA; ENERGY-LEVELS; LASER; Y2O3 AB Polarized absorption and fluorescence spectra were analyzed to establish individual energy (Stark) levels of Nd3+ ions in host crystals of Sr-5(PO4)(3)F (SFAP) and Ca-5(PO4)(3)F (FAP). Site-selective excitation and fluorescence facilitated differentiation between Nd3+ ions in emitting sites-associated with 1.06 mu m stimulated emission, and nonemitting Nd3+ ions in other sites. Measurements were made on samples containing different concentrations of Nd3+ at 4 K and higher temperatures. Substitution of Nd3+ for Sr2+ or Ca2+ was accompanied by passive charge compensation during crystal growth. Crystal-field splitting calculations were performed according to site for Stark levels of Nd3+ ions identified spectroscopically. We obtained a final set of crystal-field parameters B-nm for Nd3+ ions in fluorescing sites with a rms, deviation of 7 cm(-1) (52 levels in Nd:SFAP) and 8 cm(-1) (59 levels in Nd:FAP). For one of the nonemitting sites in Nd:FAP we obtained a final set of B-nm parameters which gave a rms deviation of 6 cm(-1) between 46 experimental and calculated levels. (C) 1996 American Institute of Physics. C1 USA,RES LAB,ADELPHI,MD 20783. USN,AIR WARFARE CTR,WEAPONS DIV,CHINA LAKE,CA 93555. SCI APPLICAT INT CORP,MCLEAN,VA 22102. USA,NIGHT VIS & ELECTR SENSORS DIRECTORATE,FT BELVOIR,VA 22060. UNIV CENT FLORIDA,CTR RES ELECTROOPT & LASERS,ORLANDO,FL 32836. RP Gruber, JB (reprint author), SAN JOSE STATE UNIV,DEPT PHYS,SAN JOSE,CA 95192, USA. NR 42 TC 29 Z9 29 U1 1 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD FEB 1 PY 1996 VL 79 IS 3 BP 1746 EP 1758 DI 10.1063/1.360964 PG 13 WC Physics, Applied SC Physics GA TT922 UT WOS:A1996TT92200077 ER PT J AU SmithJentsch, KA Jentsch, FG Payne, SC Salas, E AF SmithJentsch, KA Jentsch, FG Payne, SC Salas, E TI Can pretraining experiences explain individual differences in learning? SO JOURNAL OF APPLIED PSYCHOLOGY LA English DT Article; Proceedings Paper CT 10th Annual Conference of the Society-for-Industrial-and-Organizational-Psychology CY MAY, 1995 CL ORLANDO, FL SP Soc Ind & Org Psychol ID SELF-EFFICACY; TRAINING EFFECTIVENESS; PERFORMANCE; MOTIVATION; JOB AB This study examined the effects of having experienced negative events related to the purpose of a training program on learning and retention. Participants were 32 private pilots who participated in an assertiveness-training study. The purpose of the training was to prevent aviation accidents caused by human error. Structured telephone interviews were conducted to determine whether participants had previously experienced 3 types of negative events related to the purpose of training. Results indicated a linear relationship between these negative events and assertive performance in a behavioral exercise 1 week after training. The same negative events, however, were not significantly related to the performance of untrained participants in the same behavioral exercise. It is suggested that previous experiences influenced posttraining performance by increasing motivation to learn. C1 UNIV CENT FLORIDA,DEPT PSYCHOL,ORLANDO,FL 32816. RP SmithJentsch, KA (reprint author), USN,AIR WARFARE CTR,TRAINING SYST DIV,CODE 4961,12350 RES PKWY,ORLANDO,FL 32826, USA. NR 25 TC 23 Z9 23 U1 0 U2 4 PU AMER PSYCHOLOGICAL ASSOC PI WASHINGTON PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 SN 0021-9010 J9 J APPL PSYCHOL JI J. Appl. Psychol. PD FEB PY 1996 VL 81 IS 1 BP 110 EP 116 DI 10.1037//0021-9010.81.1.110 PG 7 WC Psychology, Applied; Management SC Psychology; Business & Economics GA TX436 UT WOS:A1996TX43600010 ER PT J AU OReilly, WC Herbers, THC Seymour, RJ Guza, RT AF OReilly, WC Herbers, THC Seymour, RJ Guza, RT TI A comparison of directional buoy and fixed platform measurements of Pacific swell SO JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY LA English DT Article ID FIELD-EVALUATION; WAVE AB The performance of the Datawell Directional Waverider and the National Data Buoy Center.(NDBC) 3-m discus buoy, widely used to measure the directional properties of surface gravity waves, are evaluated through comparisons to an array of six pressure transducers mounted 14 m below the sea surface on a platform in 200-m depth, Each buoy was deployed for several months within a few kilometers of the platform. The accuracy of the platform ground-truth army was verified by close agreement of wavenumber estimates with the theoretical linear dispersion relation for surface gravity waves. Buoy and army estimates of wave energy and directional parameters, based on integration of the directional moments across' the frequency band of energetic swell (0.06-0.14 Hz), are compared for a wide range of wave conditions. Wave energy and mean propagation direction estimates from both buoys agree well with the platform results. However, the Datawell buoy provides significantly better estimates of directional spread and skewness than the NDBC buoy. C1 UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,CTR COASTAL STUDIES,LA JOLLA,CA 92093. USN,POSTGRAD SCH,DEPT OCEANOG,MONTEREY,CA 93943. TEXAS A&M UNIV,OFFSHORE TECHNOL RES CTR,COLLEGE STN,TX. NR 17 TC 33 Z9 33 U1 0 U2 3 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0739-0572 J9 J ATMOS OCEAN TECH JI J. Atmos. Ocean. Technol. PD FEB PY 1996 VL 13 IS 1 BP 231 EP 238 DI 10.1175/1520-0426(1996)013<0231:ACODBA>2.0.CO;2 PG 8 WC Engineering, Ocean; Meteorology & Atmospheric Sciences SC Engineering; Meteorology & Atmospheric Sciences GA UB899 UT WOS:A1996UB89900019 ER PT J AU Mehaffey, PC Putnam, SD Barrett, MS Jones, RN AF Mehaffey, PC Putnam, SD Barrett, MS Jones, RN TI Evaluation of in vitro spectra of activity of azithromycin, clarithromycin, and erythromycin tested against strains of Neisseria gonorrhoeae by reference agar dilution, disk diffusion, and Etest methods SO JOURNAL OF CLINICAL MICROBIOLOGY LA English DT Article ID SAFETY; MEN AB The macrolide-azilide susceptibility testing (agar dilution, disk diffusion, Etest) criteria for 105 Neisseria gonorrhoeae strains were evaluated. In addition, the potencies of azithromycin, clarithromycin, and erythromycin were studied. The most active macrolide-azilide agent was azithromycin (MIC at which 90% of the isolates are inhibited [MIG(90)], 0.5 mu g/ml) compared with clarithromycin (MIC(90), 1.5 to 2 mu g/ml) and erythromycin (MIC(90), 2 to 4 mu g/ml). The Etest (AB Biodisk, Solna, Sweden) was observed to produce MIC results very similar to those of the reference agar dilution test (GC agar base), with 100% of the results within 1 log(2) dilution step of the reference MICs. The disk diffusion test zone diameters for all three drugs correlated at an acceptable level (r = -0.81 to -0.92) with the reference agar dilution MICs. Interpretive criteria for susceptibility were proposed for azithromycin at a MIC of less than or equal to 2 mu g/ml and a disk diffusion test zone of greater than or equal to 25 mm. No category for resistance was proposed because of the paucity of strains for which MICs were >2 mu g/ml. These tentative criteria should be further validated by correlations with clinical trial data for gonococcal strains (as they emerge) that have azithromycin MICs above the proposed susceptible category range. C1 UNIV IOWA,COLL MED,DEPT PATHOL,DIV MED MICROBIOL,IOWA CITY,IA 52242. USN,ENVIRONM & PREVENT MED UNIT,SAN DIEGO,CA 92152. NR 14 TC 11 Z9 11 U1 0 U2 2 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0095-1137 J9 J CLIN MICROBIOL JI J. Clin. Microbiol. PD FEB PY 1996 VL 34 IS 2 BP 479 EP 481 PG 3 WC Microbiology SC Microbiology GA TQ538 UT WOS:A1996TQ53800054 PM 8789046 ER PT J AU Kennedy, TA Glaser, ER Brown, SW Cavenett, BC Prior, KA AF Kennedy, TA Glaser, ER Brown, SW Cavenett, BC Prior, KA TI Optically detected magnetic resonance of MBE-grown ZnSe:N SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 7th International Conference on II-VI Compounds and Devices CY AUG 13-18, 1995 CL HERIOT WATT UNIV, EDINBURGH, SCOTLAND SP Heriot Watt Univ, Lothian & Edinburgh Enterprise Ltd, City Edinburgh, VG Semicon Ltd, EPI, Sony Corp, Megatech, Compound Semiconductor Magazine, III Vs Rev, Johnson Matthey, Oxford Appl Res, Thomas Swan, Spectra Phys HO HERIOT WATT UNIV AB Previous ODMR studies of MBE-grown ZnSe:N have been extended to include frequency-dependent studies of the g = 1.38 line. The shape of this line at 9 and 35 GHz is very close to that of a powder pattern found typically in randomly oriented solids. Lowest-order simulations give an axial symmetry with g(parallel to) = 1.27 and g(perpendicular to) = 1.38. The symmetry and randomness suggest that the donor is associated with dislocations. C1 HERIOT WATT UNIV,DEPT PHYS,EDINBURGH EH14 4AS,MIDLOTHIAN,SCOTLAND. RP Kennedy, TA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 11 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD FEB PY 1996 VL 159 IS 1-4 BP 325 EP 328 DI 10.1016/0022-0248(95)00705-9 PG 4 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA UH324 UT WOS:A1996UH32400069 ER PT J AU Jonker, BT Abad, H Yu, WY Stoltz, S Petrou, A Warnock, J Poweleit, CD Smith, LM Schmiedel, T AF Jonker, BT Abad, H Yu, WY Stoltz, S Petrou, A Warnock, J Poweleit, CD Smith, LM Schmiedel, T TI Spin dependent carrier localization in Fe-based semimagnetic semiconductor heterostructures SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 7th International Conference on II-VI Compounds and Devices CY AUG 13-18, 1995 CL HERIOT WATT UNIV, EDINBURGH, SCOTLAND SP Heriot Watt Univ, Lothian & Edinburgh Enterprise Ltd, City Edinburgh, VG Semicon Ltd, EPI, Sony Corp, Megatech, Compound Semiconductor Magazine, III Vs Rev, Johnson Matthey, Oxford Appl Res, Thomas Swan, Spectra Phys HO HERIOT WATT UNIV ID QUANTUM-WELLS; SUPERLATTICE FORMATION; ZN1-XMNXSE; LIFETIMES; BEHAVIOR AB Semimagnetic (or diluted magnetic) semiconductor heterostructures offer many unique opportunities for the study of spin dependent effects, including magnetic field induced quantum confinement and carrier spin lifetimes, In diluted magnetic semiconductors (DMS) such as Zn1-xFexSe, strong spin exchange interactions significantly modify the band structure in the presence of an applied magnetic field. This allows one to continuously and reversibly modify the band offsets in tailored heterostructures to selectively localize carriers according to their spin state, thereby providing another degree of freedom in tuning the spatial localization and overlap of carrier wave functions after the fact of growth. We review several examples which have been recently demonstrated in Zn1-xFexSe-based heterostructures grown by molecular beam epitaxy, including field tunable type-I-type-II transitions, the formation of a spin superlattice, and the continuous evolution of band alignment to the realization of a re-entrant type-I structure. Additional control over carrier confinement and lifetimes via carrier spin is possible in structures which consist of alternating layers of Zn1-xFexSe and Zn1-yMnySe. In such multiple quantum well systems, the heavy hole exciton simultaneously exhibits both Brillouin and Van Vleck paramagnetic behavior depending upon the spin state probed, Evidence is also observed for the formation of an electron spin population inversion which arises from the spin splitting of the electron states and the simultaneous spin separation of the holes into different layers of the structure. C1 SUNY BUFFALO, BUFFALO, NY 14260 USA. IBM CORP, THOMAS J WATSON RES CTR, YORKTOWN HTS, NY 10598 USA. UNIV CINCINNATI, CINCINNATI, OH 45221 USA. FLORIDA STATE UNIV, NATL HIGH MAGNET FIELD LAB, TALLAHASSEE, FL 32306 USA. RP USN, RES LAB, WASHINGTON, DC 20375 USA. RI Smith, Leigh/A-1071-2009 OI Smith, Leigh/0000-0002-3950-1713 NR 23 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 EI 1873-5002 J9 J CRYST GROWTH JI J. Cryst. Growth PD FEB PY 1996 VL 159 IS 1-4 BP 947 EP 958 DI 10.1016/0022-0248(95)00822-5 PG 12 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA UH324 UT WOS:A1996UH32400202 ER PT J AU Sinn, MT delAlamo, JA Bennett, BR Haberman, K Celii, FG AF Sinn, MT delAlamo, JA Bennett, BR Haberman, K Celii, FG TI Characterization of surface roughness anisotropy on mismatched InAlAs/InP heterostructures SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article DE heterostructures; InAlAs/InP; surface roughness ID HIGHLY STRAINED INGAAS; SCATTERING AB We have studied surface roughness on mismatched In0.65Al0.35As epilayers of various thicknesses on (001) InP. The sample set spans the entire range from coherently strained to completely relaxed epilayers. As characterization tools, we have used atomic force microscopy (AFM), laser light scattering (LLS), and variable azimuthal angle ellipsometry (VAAE). AFM reveals that the surfaces are covered by densely packed ellipsoidal islands elongated along the [1 (1) over bar 0] direction. The island size increases with layer thickness. Island anisotropy the root mean square of the surface roughness increase with increasing thickness but decrease upon full lattice relaxation. LLS intensity displays a prominent azimuthal dependence that correlates well with the two-dimensional power spectrum of the surface topography, as predicted by theory. VAAE reveals a sinusoidal dependence of the ellipsometric parameter Delta on azimuthal angle. The amplitude of Delta correlates well with the short wavelength anisotropy of the surface power spectrum. Our work suggests that LLS and VAAE are fast, nondestructive, sensitive techniques for characterization of surface roughness in mismatched III-V heterostructures. C1 USN,RES LAB,WASHINGTON,DC 20375. TEXAS INSTRUMENTS INC,DALLAS,TX 75265. RP Sinn, MT (reprint author), MIT,77 MASSACHUSETTS AVE,CAMBRIDGE,MA 02139, USA. RI Bennett, Brian/A-8850-2008; OI Bennett, Brian/0000-0002-2437-4213; del Alamo, Jesus/0000-0003-4003-7863 NR 20 TC 3 Z9 3 U1 0 U2 1 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD FEB PY 1996 VL 25 IS 2 BP 313 EP 319 DI 10.1007/BF02666263 PG 7 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA TU672 UT WOS:A1996TU67200025 ER PT J AU Guzdar, PN Chaturvedi, PK Papadopoulos, K Keskinen, MJ Ossakow, SL AF Guzdar, PN Chaturvedi, PK Papadopoulos, K Keskinen, MJ Ossakow, SL TI The self-focusing instability in the presence of density irregularities in the ionosphere SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID HF EXCITED INSTABILITIES; RADIO-WAVES; HIGH-POWER; ELECTROMAGNETIC-WAVES; POLAR IONOSPHERE; PLASMA-WAVES; ARECIBO; SCINTILLATIONS; FILAMENTATION AB The self-focusing instability of high-power radio waves in the ionosphere in the presence of density irregularities is presented. The present study addresses the role of preexisting density irregularities which are always present in the instability region. The presence of ambient irregularities results in the excitation of wave numbers, which, on the basis of homogeneous theory of the self-focusing instability, should be stable. This effect can explain the puzzling observations that indicate growth of the medium-scale (on the order of hundreds of meters) irregularities during ionospheric heating. The computational results are compared with available experimental data and will be used to plan experiments using the upcoming High-Frequency Active Auroral Research Program heater. C1 USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375. RP Guzdar, PN (reprint author), UNIV MARYLAND,INST PLASMA RES,COLLEGE PK,MD 20742, USA. NR 30 TC 14 Z9 16 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD FEB 1 PY 1996 VL 101 IS A2 BP 2453 EP 2460 DI 10.1029/95JA02975 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TT923 UT WOS:A1996TT92300015 ER PT J AU Mascola, JR Snyder, SW Weislow, OS Belay, SM Belshe, RB Schwartz, DH Clements, ML Dolin, R Graham, BS Gorse, GJ Keefer, MC McElrath, MJ Walker, MC Wagner, KF McNeil, JG McCutchan, FE Burke, DS AF Mascola, JR Snyder, SW Weislow, OS Belay, SM Belshe, RB Schwartz, DH Clements, ML Dolin, R Graham, BS Gorse, GJ Keefer, MC McElrath, MJ Walker, MC Wagner, KF McNeil, JG McCutchan, FE Burke, DS TI Immunization with envelope subunit vaccine products elicits neutralizing antibodies against laboratory-adapted but not primary isolates of human immunodeficiency virus type 1 SO JOURNAL OF INFECTIOUS DISEASES LA English DT Article ID FELINE LEUKEMIA-VIRUS; SOLUBLE CD4; RECOMBINANT GP160; MONOCLONAL-ANTIBODY; GLYCOPROTEIN GP120; HIV-1 INFECTION; SCD4 BINDING; CHIMPANZEES; PROTECTION; IMMUNOGENICITY AB Phase I studies of volunteers not infected with human immunodeficiency virus type 1 (HIV-1) have shown that immunization with envelope subunit vaccine products elicits antibodies that neutralize laboratory-adapted (prototype) HIV-1 strains in vitro, Prototype strains are adapted to grow in continuous (neoplastic) cell lines and are more susceptible to neutralization than are primary isolates cultured in human peripheral blood mononuclear cells, In this study, 50 sera from nine phase I vaccine trials and 16 from HIV-1-infected persons were evaluated for neutralizing antibody activity against 3 laboratory-adapted and 5 primary HIV-1 isolates, Of 50 sera, 49 neutralized at least 1 of the prototype strains; however, none displayed neutralizing activity against primary isolates of HIV-1, Serum from most HIV-1-infected persons neutralized both laboratory-adapted and primary HIV-1 isolates, These data demonstrate a qualitative, or large quantitative, difference in the neutralizing antibody response induced by envelope subunit vaccination and natural HIV-1 infection. C1 SRA TECHNOL INC,ROCKVILLE,MD. USN,MED RES INST,DEPT INFECT DIS,BETHESDA,MD. NIAID,BETHESDA,MD 20892. JOHNS HOPKINS UNIV,SCH HYG & PUBL HLTH,BALTIMORE,MD 21205. SCH MED,BALTIMORE,MD. ST LOUIS UNIV,SCH MED,DEPT MED,ST LOUIS,MO. UNIV ROCHESTER,SCH MED & DENT,DEPT MED,NEW YORK,NY. VANDERBILT UNIV,SCH MED,DEPT MED,NASHVILLE,TN 37212. WASHINGTON UNIV,SCH MED,DEPT MED,SEATTLE,WA. RP Mascola, JR (reprint author), WALTER REED ARMY INST RES,DIV RETROVIROL,HENRY M JACKSON FDN ADV MIL MED,13 TAFT CT,ROCKVILLE,MD 20850, USA. OI /0000-0002-5704-8094 FU NIAID NIH HHS [AI-05061, AI-05063, AI-05064] NR 67 TC 370 Z9 373 U1 2 U2 7 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0022-1899 J9 J INFECT DIS JI J. Infect. Dis. PD FEB PY 1996 VL 173 IS 2 BP 340 EP 348 PG 9 WC Immunology; Infectious Diseases; Microbiology SC Immunology; Infectious Diseases; Microbiology GA TT665 UT WOS:A1996TT66500009 PM 8568294 ER PT J AU Sun, LY Xu, L Henry, FA Spiegel, S Nielsen, TB AF Sun, LY Xu, L Henry, FA Spiegel, S Nielsen, TB TI A new wound healing agent - Sphingosylphosphorylcholine SO JOURNAL OF INVESTIGATIVE DERMATOLOGY LA English DT Article DE lysosphingomyelin; spingosine; sphingolipid; cell proliferation ID GROWTH-FACTOR-BETA; CELLULAR PROLIFERATION; SPHINGOSINE; CELLS; SPHINGOSINE-1-PHOSPHATE; SPHINGOLIPIDS AB Sphingosylphosphorylcholine (lysosphingomyelin or SPC) is an effective and broad spectrum cell growth promoting agent and a candidate for evaluation on wound healing. The effect of SPC on full-thickness excision and incision wounds in genetically healing-impaired diabetic (db/db) mice was evaluated by measurement of wound area, skin strength, and tissue histology. The effect on cell proliferation was measured in vivo by incorporation of bromo-deoxyuridine and in vitro by [H-3]thymidine incorporation. SPC increased the rate of wound closure, with a statistically significant improvement in measured wound areas (p < 0.02, compared with vehicle controls), The optimum concentration was 2-3 mu M. SPC, alone and in combination with insulin, stimulated DNA synthesis in cells known to participate in wound healing, including microvascular endothelial cells, In vivo, SPC stimulated proliferation of keratinocytes, fibroblasts, endothelial cells, and cells around sebaceous glands and hair follicles at day 2-4 postwound, resulting in a complete re-epithelialization and profound granulation tissue formation in excisional and incisional wound sites of db/db and db/+ mice. Quantitative assessment of wound tissue section morphology indicated that SPC induced up to a 3-fold increase in the numbers of mitotic cells, resulted in a smaller cross-sectional scar area, and led to more normalized tissue in the wound sites, SPC had no deleterious effect on wound skin strength. In conclusion, the acceleration of dermal wound healing in animal models suggests that SPC could be an interesting candidate for clinical application. C1 USN,MED RES INST,WOUND REPAIR ENHANCEMENT PROGRAM,BETHESDA,MD 20889. USN,MED RES INST,DEPT PATHOBIOL,BETHESDA,MD 20889. UNIFORMED SERV UNIV HLTH SCI,DEPT SURG,BETHESDA,MD 20814. GEORGETOWN UNIV,MED CTR,DEPT BIOCHEM & MOLEC BIOL,WASHINGTON,DC 20007. FU NCI NIH HHS [CA61774] NR 30 TC 61 Z9 62 U1 0 U2 1 PU BLACKWELL SCIENCE INC PI CAMBRIDGE PA 238 MAIN ST, CAMBRIDGE, MA 02142 SN 0022-202X J9 J INVEST DERMATOL JI J. Invest. Dermatol. PD FEB PY 1996 VL 106 IS 2 BP 232 EP 237 PG 6 WC Dermatology SC Dermatology GA TZ567 UT WOS:A1996TZ56700007 PM 8601721 ER PT J AU Meadows, C AF Meadows, C TI The NRL protocol analyzer: An overview SO JOURNAL OF LOGIC PROGRAMMING LA English DT Article; Proceedings Paper CT 2nd International Conference on Practical Applications of Prolog (PAP 94) CY APR, 1994 CL LONDON, ENGLAND ID SECURITY AB The NRL Protocol Analyzer is a prototype special-purpose verification tool, written in Prolog, that has been developed for the analysis of cryptographic protocols that are used to authenticate principals and services and distribute keys in a network. In this paper we give an overview of how the Analyzer works and describe its achievements so far. We also show how our use of the Prolog language benefited us in the design and implementation of the Analyzer. RP Meadows, C (reprint author), USN,RES LAB,CTR HIGH ASSURANCE COMP SYST,CODE 5543,4555 OVERLOOK AVE SW,WASHINGTON,DC 20375, USA. NR 17 TC 168 Z9 179 U1 0 U2 2 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0743-1066 J9 J LOGIC PROGRAM JI J. Log. Program. PD FEB PY 1996 VL 26 IS 2 BP 113 EP 131 DI 10.1016/0743-1066(95)00095-X PG 19 WC Computer Science, Theory & Methods SC Computer Science GA TW408 UT WOS:A1996TW40800003 ER PT J AU Kodres, CA AF Kodres, CA TI Moisture-induced pressures in concrete airfield pavements SO JOURNAL OF MATERIALS IN CIVIL ENGINEERING LA English DT Article ID POROUS-MEDIA; HEAT AB A mathematical model is developed to predict pressures generated by water and air in the pores of airfield concrete being heated by a jet exhaust. The foundation of this model is a constitutive relationship to characterize the flow of high-velocity, compressible, heated gases through a high-resistance porous medium. The key premise is that the resistance to flow can be modeled with friction coefficients analogous to the method used for simpler geometries. Pore pressure predicted using this model suggest that moisture in the pores of the cement paste is a probable cause of material failure when the pavement is being heated by the exhaust of a vertical takeoff aircraft such as the Harrier. With an initial pore saturation of 90% or greater, high pore pressures and pressure gradients result from air being compressed by the expansion of liquid water. Concrete temperatures beneath a Harrier reach 300 degrees C in about 2 min. Even with a low saturation, the water vapor pressure could eventually be sufficient to cause a tensile failure in portland cement concrete. RP Kodres, CA (reprint author), USN, FACILITITES ENGN SERV CTR, PORT HUENEME, CA 93043 USA. NR 38 TC 7 Z9 9 U1 0 U2 1 PU ASCE-AMER SOC CIVIL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0899-1561 J9 J MATER CIVIL ENG JI J. Mater. Civ. Eng. PD FEB PY 1996 VL 8 IS 1 BP 41 EP 50 DI 10.1061/(ASCE)0899-1561(1996)8:1(41) PG 10 WC Construction & Building Technology; Engineering, Civil; Materials Science, Multidisciplinary SC Construction & Building Technology; Engineering; Materials Science GA TQ985 UT WOS:A1996TQ98500006 ER PT J AU Prokes, SM AF Prokes, SM TI Surface and optical properties of porous silicon SO JOURNAL OF MATERIALS RESEARCH LA English DT Review ID HYDROGENATED AMORPHOUS-SILICON; VISIBLE-LIGHT EMISSION; OXYGEN HOLE-CENTERS; N-TYPE SILICON; QUANTUM CONFINEMENT; PHOTOLUMINESCENCE INTENSITY; SI PHOTOLUMINESCENCE; LUMINESCENCE; MECHANISM; SPECTRA AB Although silicon is the material of choice in the semiconductor industry, it has one serious disadvantage: it is an extremely poor optoelectronic material. This is because it is an indirect gap semiconductor, in which radiative transition results in extremely weak light emission in the infrared part of the spectrum. Thus, the discovery of strong visible luminescence from a silicon-based material (porous silicon) has been quite surprising and has generated significant interest, both scientific and technological. This material differs from bulk silicon in one important way, in that it consists of interconnected silicon nanostructures with very large surface to volume ratios. Although the first mechanism proposed to explain this emission process involved carrier recombination within quantum size silicon particles, more recent work has shown that the surface chemistry appears to be the controlling factor in this light emission process. Thus, the aim of this work is to outline the data and arguments that have been presented to support the quantum confinement model, along with the shortcomings of such a model, and to examine more recent models in which the chemical and structural properties of the surface regions of the nanostructures have been incorporated. RP Prokes, SM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 140 TC 79 Z9 79 U1 2 U2 8 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD FEB PY 1996 VL 11 IS 2 BP 305 EP 320 PG 16 WC Materials Science, Multidisciplinary SC Materials Science GA TU516 UT WOS:A1996TU51600006 ER PT J AU Ho, YS Schoen, P AF Ho, YS Schoen, P TI Artificial dielectrics of conductive fibers in polymers: Effects of viscosity and matrix composition on permittivity and loss SO JOURNAL OF MATERIALS RESEARCH LA English DT Article AB We report the microwave dielectric properties of composites made of nickel-coated graphite fibers in two different types of silicone polymers. The influence of matrix viscosity on the fiber alignment, fiber filamentation in the composites, and how those affect the permittivity and loss tangent of the composite are discussed. The dependence of the permittivity and loss of the composites on the permittivity and loss of the matrix will also be compared. C1 GEORGETOWN UNIV,DEPT BIOCHEM,WASHINGTON,DC 20375. RP Ho, YS (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,CODE 6900,WASHINGTON,DC 20375, USA. NR 8 TC 3 Z9 3 U1 1 U2 2 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD FEB PY 1996 VL 11 IS 2 BP 469 EP 474 DI 10.1557/JMR.1996.0056 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA TU516 UT WOS:A1996TU51600026 ER PT J AU McCarthy, MC Haberberger, RL Salib, AW Soliman, BA ElTigani, A Khalid, IO Watts, DM AF McCarthy, MC Haberberger, RL Salib, AW Soliman, BA ElTigani, A Khalid, IO Watts, DM TI Evaluation of arthropod-borne viruses and other infectious disease pathogens as the causes of febrile illnesses in the Khartoum Province of Sudan SO JOURNAL OF MEDICAL VIROLOGY LA English DT Article DE epidemiology; arboviruses; malaria; bacterial diseases; Khartoum; Sudan ID RIFT-VALLEY FEVER; IMMUNOFLUORESCENCE; LASSA AB The relative importance of arthropod-borne and other disease pathogens as the cause of an outbreak of febrile illnesses was assessed during August 1988, following severe flooding in Khartoum, Sudan. A total of 200 patients with acute febrile illness and 100 afebrile controls were enrolled in the study during October and November 1988, at the Omdurman Military Hospital, Khartoum, Sudan. Sera were tested for IgM and IgG antibodies to six arthropod-borne viruses by an enzyme-linked immunoabsorbent assay, and for similar antibodies to Lassa fever, Crimean-Congo hemorrhagic fever, and Ebola and Marburg viruses by an indirect fluorescence assay. Thick and thin blood smears were examined microscopically for malaria parasites, and fecal and blood specimens were tested for bacteria by standard culture methods. Among the acute and convalescent sera collected from 67 febrile patients, five cases were caused by sandfly fever Sicilian (SFS), six by sandfly fever Naples (SFN), and 12 by unidentified phleboviruses. Of 233 remaining unpaired, acute-phase sera collected from cases and controls, 49 (21%) had IgM antibodies to SFS or SFN, RVF, West Nile (WN), and Chikungunya (CHIK) viruses. Forty-three (22%) of 192 febrile cases and two of the 100 afebrile controls were positive for Plasmodium falciparum, and bacterial enteropathogens were associated with 25 (13%) cases and four controls. These data indicated that phleboviruses and to a lesser extent, WN, P. falciparum, and enterobacterial pathogens were causes of acute febrile illnesses following the 1988 flood in Khartoum, Sudan. (C) 1996 Wiley-Liss, Inc.* C1 MINIST HLTH SUDAN,KHARTOUM,SUDAN. USN,MED RES UNIT 3,CAIRO,EGYPT. NR 16 TC 31 Z9 33 U1 0 U2 6 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0146-6615 J9 J MED VIROL JI J. Med. Virol. PD FEB PY 1996 VL 48 IS 2 BP 141 EP 146 DI 10.1002/(SICI)1096-9071(199602)48:2<141::AID-JMV4>3.0.CO;2-9 PG 6 WC Virology SC Virology GA TU189 UT WOS:A1996TU18900004 PM 8835346 ER PT J AU Sarpkaya, T OKeefe, JL AF Sarpkaya, T OKeefe, JL TI Oscillating flow about two and three-dimensional bilge keels SO JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article ID NUMBERS AB The paper describes an experimental investigation of the damping provided by bilge keels in an oscillating pow (in a large U-shaped water tunnel). Rectangular and square pat plates were placed adjacent to a solid boundary (with no gap) in order to simulate pow about bilge keels. The single free edge of the rectangular plate and the three free edges of the square plates were beveled to 60-deg angles so as to form sharp edges with included angles of about 60 deg. For comparison, another sharp-edged rectangular plate was tested without the wall proximity effects. All plates Mere held normal to the direction of the ambient pow. The Fourier-averaged drag and inertia coefficients were then calculated as a function of a suitable Keulegan-Carpenter number through the use of the instantaneous force acting on each plate. RP Sarpkaya, T (reprint author), USN,POSTGRAD LAB,700 DYER RD,ROOM 339,MONTEREY,CA 93943, USA. NR 29 TC 20 Z9 20 U1 0 U2 4 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0892-7219 J9 J OFFSHORE MECH ARCT JI J. Offshore Mech. Arct. Eng. Trans. ASME PD FEB PY 1996 VL 118 IS 1 BP 1 EP 6 DI 10.1115/1.2828796 PG 6 WC Engineering, Ocean; Engineering, Mechanical SC Engineering GA TX654 UT WOS:A1996TX65400001 ER PT J AU Dawson, TH Kriebel, DL Wallendorf, LA AF Dawson, TH Kriebel, DL Wallendorf, LA TI Markov description of wave-crest statistics SO JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article AB Markov description of wave-crest statistics is considered for the case of severe random seas where Stokes nonlinearities require crests to rise higher than troughs fall. Of interest are the average number of consecutive high waves in runs of high waves and the average number of waves between beginnings of such runs, with high waves being defined in terms of a threshold level above mean water level. Two basic parameters are involved in the description: I) the probability P that a high wave will occur at a fixed location, and 2) a coefficient C relating P to the probabilities associated with transitions from high to low waves and low to high waves. Comparison with laboratory measurements from scaled Bretschneider seas having a range of nonlinearities indicates that the basic Stokes nonlinearity is contained in the probability P, with no sensible dependence exhibited by the coefficient C. Additional comparison with scaled Jonswap seas illustrates the dependence of this coefficient on spectral shape. A final consideration of results from full-scale hurricane sea conditions, and from corresponding scaled laboratory data, demonstrates the general applicability of the laboratory results presented here to actual wind-driven seas. RP USN ACAD, 590 HOLLOWAY RD, ANNAPOLIS, MD 21402 USA. NR 12 TC 10 Z9 10 U1 0 U2 0 PU ASME PI NEW YORK PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA SN 0892-7219 EI 1528-896X J9 J OFFSHORE MECH ARCT JI J. Offshore Mech. Arct. Eng. Trans. ASME PD FEB PY 1996 VL 118 IS 1 BP 37 EP 45 DI 10.1115/1.2828799 PG 9 WC Engineering, Ocean; Engineering, Mechanical SC Engineering GA TX654 UT WOS:A1996TX65400006 ER PT J AU Brook, I Frazier, EH AF Brook, I Frazier, EH TI Microbial dynamics of persistent purulent otitis media in children SO JOURNAL OF PEDIATRICS LA English DT Article ID ANAEROBIC-BACTERIA AB Repeated aspirations (for a period of 36 to 55 days) of the exudate through an open perforation were performed in seven children with acute otitis media that did not respond to antimicrobial therapy. Penicillin-resistant organisms were present in all but one of the first two aspirates. Failure to respond to antimicrobial therapy was associated with the emergence of resistant anaerobic and aerobic bacteria in the third and fourth cultures. The infection was cured in all instances after administration of antimicrobial agents effective against these bacteria. C1 GEORGETOWN UNIV, SCH MED, DEPT PEDIAT, WASHINGTON, DC 20007 USA. USN HOSP, DEPT INFECT DIS, BETHESDA, MD USA. NR 16 TC 22 Z9 22 U1 0 U2 0 PU MOSBY-ELSEVIER PI NEW YORK PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA SN 0022-3476 EI 1097-6833 J9 J PEDIATR-US JI J. Pediatr. PD FEB PY 1996 VL 128 IS 2 BP 237 EP 240 DI 10.1016/S0022-3476(96)70397-9 PG 4 WC Pediatrics SC Pediatrics GA TW054 UT WOS:A1996TW05400014 PM 8636819 ER PT J AU Zhu, J Lewis, TG Zhao, LH Jackson, W Wilson, RL AF Zhu, J Lewis, TG Zhao, LH Jackson, W Wilson, RL TI HaRTS: Performance-based design of distributed hard real-time software SO JOURNAL OF SYSTEMS AND SOFTWARE LA English DT Article AB We introduce a hard real-time software development environment, called HaRTS, which consists of a performance-based design tool, three static scheduling tools, a code generator, and a visualization tool. HaRTS solves three problems: (1) how to specify a real-time system design that will capture hard deadline requirements and timing information as well as traditional control/data flow structure information; (2) how to decide, from the design, if the implementation will meet all deadlines, and (3) how to visualize the system as a running prototype so that design errors can be found before coding. The first problem is solved by adapting SADT/IDEFO to the real-time design domain. We do this by adding timing information to SADT-like graphical notation, and then analyzing the flattened diagram to derive a performance-based design. Problem two is solved by a new static scheduling algorithm that considers precedence-constrained tasks as well as hard deadlines. Problem three is solved by incorporating several novel visualization tools into HaRTS: dynamic Gantt charts, task graph animation, and processor animation. HaRTS has been successfully used to analyze and improve a number of real-time systems in navigation and flight control. Light-weight Ada task execution, combined with Ada code generation, make HaRTS a practical tool for design engineers. C1 USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943. BOEING CO,DEF & SPACE GRP,SEATTLE,WA. NR 6 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0164-1212 J9 J SYST SOFTWARE JI J. Syst. Softw. PD FEB PY 1996 VL 32 IS 2 BP 143 EP 156 DI 10.1016/0164-1212(94)00066-2 PG 14 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA TT100 UT WOS:A1996TT10000005 ER PT J AU Ko, SH AF Ko, SH TI Flexural wave reduction using a compliant tube baffle SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB A theoretical model was developed to evaluate the reduction of flexural wave that is generated by a line force applied on an infinite plate using a compliant baffle. The compliant baffle layer placed between the plate excited by a line force and a signal conditioning plate is designed for reducing pressure fluctuations from the vibrating plate. The baffle layer considered here is the compliant-tube array, modeled by Junger [J. Acoust. Soc. Am. 78, 1010 (1985)] to represent a homogeneous (dispersive) fluid layer. Effects of various parameters such as the aspect ratio of the compliant tube, the distance between tubes, and the damping of the tube material on the flexural wave reduction are presented. Calculations of noise reductions were made for both the dispersive and nondispersive fluid baffles. RP Ko, SH (reprint author), USN,UNDERSEA WARFARE CTR,NEW LONDON DETACHMENT,NEW LONDON,CT 06320, USA. NR 9 TC 2 Z9 3 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD FEB PY 1996 VL 99 IS 2 BP 691 EP 699 DI 10.1121/1.415231 PG 9 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA TU680 UT WOS:A1996TU68000005 ER PT J AU Chiu, CS Miller, JH Lynch, JF AF Chiu, CS Miller, JH Lynch, JF TI Forward coupled-mode propagation modeling for coastal acoustic tomography SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB A coupled normal-mode approach for the prediction of pulse propagation in a complex coastal environment is presented. In this broadband approach, the received time-domain sound-pressure signal is generated by Fourier synthesis using the product of the source signal spectrum and the source-to-receiver ocean transfer function. For a given frequency, the basic formulation involves decomposing the acoustic pressure into slowly varying complex envelopes that modulate (mode by mode) analytic, rapidly varying, adiabatic-mode solutions. A coupled set of differential equations governing these complex modal envelopes is derived and the numerical solution techniques used are discussed. This coupled-mode approach has been used to model the modal arrival structure in the 1992 Barents Sea Coastal Acoustic Tomography Test. Model results and comparison to the data measured by a vertical hydrophone array are discussed. (C) 1996 Acoustical Society of America. C1 USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943. WOODS HOLE OCEANOG INST,DEPT APPL OCEAN PHYS & ENGN,WOODS HOLE,MA 02543. RP Chiu, CS (reprint author), USN,POSTGRAD SCH,DEPT OCEANOG,CODE OC-CI,MONTEREY,CA 93943, USA. OI Miller, James H./0000-0001-7156-3589 NR 17 TC 22 Z9 23 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD FEB PY 1996 VL 99 IS 2 BP 793 EP 802 DI 10.1121/1.414673 PG 10 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA TU680 UT WOS:A1996TU68000018 ER PT J AU Lynch, JF Jin, GL Pawlowicz, R Ray, D Chiu, CS Miller, JH Bourke, RH Parsons, AR Muench, R AF Lynch, JF Jin, GL Pawlowicz, R Ray, D Chiu, CS Miller, JH Bourke, RH Parsons, AR Muench, R TI Acoustic travel-time perturbations due to shallow-water internal waves and internal tides in the Barents Sea Polar Front: Theory and experiment SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID HORIZONTAL REFRACTION; SOLITONS AB During August 1992, a combined acoustics/physical oceanography experiment was performed to study both the acoustical properties and the ocean dynamics of the Barents Sea Polar Front in the region near Bear Island. Oceanographic observations from shipboard hydrography and moored sensors allowed the construction of the internal wave frequency spectrum for the area. A rapidly sampled tomographic section from a 224-Hz, 16-Hz-bandwidth acoustic source to a 16-element vertical receiving array enabled the monitoring of travel-time fluctuations over the internal wave frequency band. To describe the measured acoustic fluctuations, theoretical expressions have been developed for the travel-time variances which are functions of the internal wave oceanographic field, the local acoustic propagation characteristics, and the acoustical system's properties, Both ray and mode theory expressions are generated, as the experiment was performed in shallow water and both ray and mode arrivals were resolvable. Comparison of the theory with the data shows generally good agreement. However, due to the fact that the internal wave study is a secondary objective of this experiment, the data are not of the quality eventually hoped for. Directions for future research in this area are outlined and discussed. (C) 1996 Acoustical Society of America. C1 USN,POSTGRAD SCH,MONTEREY,CA 93943. SCI APPLICAT INT CORP,BELLEVUE,WA 98005. RP Lynch, JF (reprint author), WOODS HOLE OCEANOG INST,WOODS HOLE,MA 02543, USA. OI Miller, James H./0000-0001-7156-3589 NR 25 TC 70 Z9 80 U1 1 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD FEB PY 1996 VL 99 IS 2 BP 803 EP 821 DI 10.1121/1.414657 PG 19 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA TU680 UT WOS:A1996TU68000019 ER PT J AU Murphy, JE Li, GQ ChinBing, SA King, DB AF Murphy, JE Li, GQ ChinBing, SA King, DB TI Multifilament source model for short-range underwater acoustic problems involving penetrable ocean bottoms SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID PARABOLIC EQUATION; SCATTERING; DEPTH AB Accurate numerical solutions generated with a new computational model are presented for several range-dependent underwater acoustic problems involving penetrable ocean bottoms. The multifilament source model [Boag et al., ''Analysis of acoustic scattering from fluid cylinders using a multifilament source model,'' J. Acoust. Soc. Am. 83, 1-8 (1988)], originally developed to treat acoustic scattering by arbitrarily shaped cylinders embedded in an infinite medium, has been extended to solve short-range ocean acoustic problems. Source model solutions for two different range-dependent problems agree with solutions that were obtained with Evans' COUPLE model [R. B. Evans, ''A coupled mode solution for acoustic propagation in a waveguide with stepwise depth variations of a penetrable bottom,'' J. Acoust. Soc. Am. 74, 188-195 (1983)]. These comparisons demonstrate the source model's ability to describe propagation in a shallow water environment with rapidly varying bathymetry and a lossy, penetrable bottom. (C) 1996 Acoustical Society of America. C1 UNIV NEW ORLEANS,DEPT MATH,NEW ORLEANS,LA 70148. USN,RES LAB,DIV ACOUST,BAY ST LOUIS,MS 39529. RP Murphy, JE (reprint author), UNIV NEW ORLEANS,DEPT PHYS,NEW ORLEANS,LA 70148, USA. NR 14 TC 5 Z9 5 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD FEB PY 1996 VL 99 IS 2 BP 845 EP 850 DI 10.1121/1.414660 PG 6 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA TU680 UT WOS:A1996TU68000023 ER PT J AU Keolian, RM AF Keolian, RM TI A simple harmonic oscillator teaching apparatus with active velocity feedback SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article RP Keolian, RM (reprint author), USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93943, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD FEB PY 1996 VL 99 IS 2 BP 1260 EP 1261 DI 10.1121/1.414638 PG 2 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA TU680 UT WOS:A1996TU68000072 ER PT J AU Mansour, AN Melendres, CA Poon, SJ He, Y Shiflet, GJ AF Mansour, AN Melendres, CA Poon, SJ He, Y Shiflet, GJ TI An x-ray absorption near-edge spectroscopic study of the structure of passive films on amorphous Al-Fe-Ce alloys SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID METALLIC GLASSES; ELECTRON-YIELD; FINE-STRUCTURE; AUGER ENERGIES; ALUMINUM; AL90FEXCE10-X; RELAXATION; PRESSURE; VACUUM; EXAFS AB We report on the composition and structure of passive oxide films of melt-spun ribbons of amorphous Al90Fe10-alphaCex (x = 3, 5, and 7) alloys using x-ray absorption near-edge structure (XANES) spectroscopy. The passive films were formed in an aerated solution of 0.9 weight percent (w/o) NaCl at constant potential in the passive region at -0.5 V vs. a saturated calomel electrode (SCE) for 60 min. The oxidation state of Fe in the passive films of these alloys is mainly +3, such as in alpha-Fe2O3 and/or gamma-Fe2O3. Cerium in the passive film of Al90Fe7Ce3 alloy is present mainly in the +3 oxidation state as Ce2O3 and/or Ce(OH)(3), with only a small fraction as Ce4+. In the passive film of Al90Fe5Ce5 alloy it is present in the +3 and +4 oxidation states (as Ce2O3 and/or Ce(OH)(3) and CeO2) while in Al90Fe3Ce7 alloy the passive film contains cerium in the +4 oxidation state as CeO2. The fact that the passive film may consist of mixed oxide phases containing Al, Fe, and Ce cannot be ruled out. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV VIRGINIA,CHARLOTTESVILLE,VA 22903. RP Mansour, AN (reprint author), USN,CTR SURFACE WARFARE,CADEROCK DIV,SILVER SPRING,MD 20903, USA. NR 32 TC 7 Z9 7 U1 0 U2 1 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD FEB PY 1996 VL 143 IS 2 BP 614 EP 619 DI 10.1149/1.1836488 PG 6 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA TW974 UT WOS:A1996TW97400046 ER PT J AU Afanas'ev, VV Revesz, AG Hughes, HL AF Afanas'ev, VV Revesz, AG Hughes, HL TI Confinement phenomena in buried oxides of SIMOX structures as affected by processing SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID OXYGEN IMPLANTATION; IRRADIATION; ELECTRON; DEFECTS AB The buried oxide (BOX) layers of SIMOX structures produced by oxygen ion implantation are confined between the Si substrate and top Si layer. Their charge trapping properties, as affected by various treatments in the presence or absence of the confining top Si layer, were studied. The BOX of most of the SIMOX samples we have studied contain electron traps related to excess silicon in the form of clusters about 1-4 nm in size. In contrast, unconfined oxides, such as thermally grown SiO2 films and the so-called ''equilibrium oxide'' prepared by oxygen ion implantation to such a thickness that all of the top Si layer is consumed, do not contain these traps. The density of traps with a relatively small capture cross section in confined BOX layers can be reduced by implanting supplemental oxygen into the completed SIMOX structure. However, the traps with relatively large cross section are only slightly affected, despite a significant increase in the oxide thickness. In contrast, traps can be completely eliminated by an oxidizing heat-treatment without measurable additional oxide growth if the structure is unconfined, i.e., the top Si layer is removed. It is suggested that the confinement effect is related to the structure of the noncrystalline BOX layer which is affected by the confining Si layers. This effect stabilizes the traps, particularly those with a large cross section, which are near the S1/BOX interface(s). C1 UNIV ERLANGEN NURNBERG, DEPT APPL PHYS, W-8520 ERLANGEN, GERMANY. REVESZ ASSOCIATES, BETHESDA, MD 20817 USA. USN, RES LAB, WASHINGTON, DC 20375 USA. NR 25 TC 19 Z9 19 U1 0 U2 0 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD FEB PY 1996 VL 143 IS 2 BP 695 EP 700 DI 10.1149/1.1836503 PG 6 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA TW974 UT WOS:A1996TW97400061 ER PT J AU Apruzese, JP Umstadter, D AF Apruzese, JP Umstadter, D TI Enhancement of short-pulse recombination-pumped gain by soft-x-ray photoionization of the ground state SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID FIELD-INDUCED IONIZATION; LASER-PULSES; HYDROGENIC IONS; AMPLIFICATION; PLASMAS; EXCITATION AB The gain achieved in lasing to the ground state following short-pulse field ionization by a pump laser is highly transient. It will usually persist for only tens of picoseconds because of the rapid filling and negligible emptying of the ground state. Employing a detailed atomic model of lasing in hydrogen, we show that the removal of ground-state population by an appropriate broadband ionizing radiation field can enhance and prolong the gain in such a laser. C1 UNIV MICHIGAN,CTR ULTRAFAST OPT SCI,ANN ARBOR,MI 48109. RP Apruzese, JP (reprint author), USN,RES LAB,DIV PLASMA PHYS,RADIAT HYDRODYNAM BRANCH,WASHINGTON,DC 20375, USA. RI Umstadter, Donald/A-1581-2016 OI Umstadter, Donald/0000-0002-2182-4346 NR 25 TC 1 Z9 1 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD FEB PY 1996 VL 13 IS 2 BP 443 EP 446 DI 10.1364/JOSAB.13.000443 PG 4 WC Optics SC Optics GA TU987 UT WOS:A1996TU98700026 ER PT J AU Eckrich, RJ AF Eckrich, RJ TI Regulations on lightbulb savings SO LABORATORY MEDICINE LA English DT Letter RP Eckrich, RJ (reprint author), USN,NATL MED CTR,BLOOD BANK,BETHESDA,MD 20814, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CLIN PATHOLOGISTS PI CHICAGO PA 2100 W HARRISON ST, CHICAGO, IL 60612 SN 0007-5027 J9 LAB MED JI Lab. Med. PD FEB PY 1996 VL 27 IS 2 BP 73 EP 74 PG 2 WC Medical Laboratory Technology SC Medical Laboratory Technology GA TR056 UT WOS:A1996TR05600002 ER PT J AU Wagner, P Ray, R Hart, K Little, B AF Wagner, P Ray, R Hart, K Little, B TI Microbiological degradation of stressed fiber-reinforced polymeric composites SO MATERIALS PERFORMANCE LA English DT Article AB Reduction of tensile strength was demonstrated for carbon fiber-reinforced epoxy resin composite strips after exposure to sulfate-reducing bacteria in batch culture. Composite strips were maintained in a stressed condition in 3- and 4-point bend fixtures before and during exposure. Exposed surfaces were examined for bacterial colonization, fiber disruption, and disbonding. Mechanical testing and acoustic emission examinations were used to evaluate degradation of tensile strength. RP Wagner, P (reprint author), USN,RES LAB,BAY ST LOUIS,MS 39529, USA. NR 14 TC 6 Z9 7 U1 1 U2 1 PU NATL ASSN CORROSION ENG PI HOUSTON PA 1440 SOUTH CREEK DRIVE, HOUSTON, TX 77084-4906 SN 0094-1492 J9 MATER PERFORMANCE JI Mater. Perform. PD FEB PY 1996 VL 35 IS 2 BP 79 EP 82 PG 4 WC Materials Science, Characterization & Testing SC Materials Science GA TV279 UT WOS:A1996TV27900018 ER PT J AU Drews, AR WongNg, W Roth, RS Vanderah, TA AF Drews, AR WongNg, W Roth, RS Vanderah, TA TI Preparation and crystal structure of Sr5TiNb4O17 SO MATERIALS RESEARCH BULLETIN LA English DT Article DE ceramics; crystal growth; X-ray diffraction; crystal structure AB The compound Sr5TiNb4O17 was prepared and its crystal structure determined by single-crystal X-ray diffraction. This compound crystallizes with an orthorhombic unit cell (space group Pnnm (No. 58); a = 5.6614(4), b = 32.515(7), c = 3.9525(3)Angstrom; Z = 2). The structure consists of alternating perovskite-like slabs offset with respect to each other by a/2 and c/2. The Sr2+ ions occupy two 12-fold coordinated sites within the slabs and a distorted (7 + 1)-fold coordinated site in the gap separating the slabs. Nb5+ and Ti4+ are distributed among the octahedral sites of the sperovskite slabs with preferential ordering of Ti4+ on octahedral sites in the center of the slabs and Nb5+ in the octahedral sites at the edges of the slabs adjacent to the gap. This compound is the n = 5 member of a structural series A(n)B(n)O(3n+2), (A = Sr; B = Ti,Nb) where n is the number of perovskite layers within each slab. C1 NATL INST STAND & TECHNOL,DIV CERAM,GAITHERSBURG,MD 20899. RP Drews, AR (reprint author), USN,RES LAB,CONDENSED MAT & RADIAT SCI DIV,WASHINGTON,DC 20375, USA. NR 13 TC 24 Z9 24 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0025-5408 J9 MATER RES BULL JI Mater. Res. Bull. PD FEB PY 1996 VL 31 IS 2 BP 153 EP 162 DI 10.1016/0025-5408(95)00177-8 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA TX230 UT WOS:A1996TX23000004 ER PT J AU Wayne, BA AF Wayne, BA TI Tobacco sales should stop SO MILITARY MEDICINE LA English DT Letter RP Wayne, BA (reprint author), USN,WASHINGTON,DC 20375, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0026-4075 J9 MIL MED JI Milit. Med. PD FEB PY 1996 VL 161 IS 2 BP A4 EP A4 PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA TU800 UT WOS:A1996TU80000003 PM 8857214 ER PT J AU Georges, TM Harlan, JA Lematta, RA AF Georges, TM Harlan, JA Lematta, RA TI Large-scale mapping of ocean surface currents with dual over-the-horizon radars SO NATURE LA English DT Article AB DETAILED information about near-surface ocean currents is needed for effective fisheries management, pollution mitigation, search and rescue, and climate studies, but the present generation of measurement techniques provides only limited spatial and temporal resolution or coverage(1,2). In near-coastal environments, pairs of shore-based high-frequency radars have been used to map surface currents over an area of a few hundred square kilometres(3,4). The potential for mapping open-ocean current fields has been demonstrated using military high-frequency radars that can be used to 'see' over the horizon for thousands of kilometres by reflecting signals off the ionosphere. But using one radar, only one current component can be mapped by this method(5). Here we report the mapping of surface-current vectors obtained from simultaneously employing two such radar systems with overlapping coverage. We obtain a current map in the Florida Straits, about 1,500 km from the radars, covering two 70,000 km(2) areas at a resolution of 10 km and 0.1 m s(-1). As it employs only about 2% of the radars' potential coverage, the test shows the potential of this technique for mapping the more energetic features of ocean circulation-such as boundary currents and mesoscale eddy systems-over vast ocean areas. C1 UNIV COLORADO,NOAA,COOPERAT INST RES ENVIRONM SCI,BOULDER,CO 80303. USN,COMMAND CONTROL & OCEAN SURVEILLANCE CTR,RES DEV TEST & EVALUAT DIV,SAN DIEGO,CA 92152. RP Georges, TM (reprint author), NOAA,ENVIRONM TECHNOL LAB,BOULDER,CO 80303, USA. NR 7 TC 17 Z9 17 U1 2 U2 2 PU MACMILLAN MAGAZINES LTD PI LONDON PA 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF SN 0028-0836 J9 NATURE JI Nature PD FEB 1 PY 1996 VL 379 IS 6564 BP 434 EP 436 DI 10.1038/379434a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TT304 UT WOS:A1996TT30400054 ER PT J AU Amer, R Carreras, F Magana, A Owen, G AF Amer, R Carreras, F Magana, A Owen, G TI Multilinear extensions and quotients of simple games SO NAVAL RESEARCH LOGISTICS LA English DT Article AB Studied here is the problem of evaluating the formation of coalitions in cooperative games by considering its internal and external effects. Our analysis is based upon a formal theory of the quotient game and the use of multilinear extensions to compute the Shapley value and the coalitional value. When it applies to simple games, a series of interesting results is obtained. (C) 1996 John Wiley & Sons, Inc. C1 USN,POSTGRAD SCH,DEPT MATH,MONTEREY,CA 93943. RP Amer, R (reprint author), SCH IND ENGN,DEPT MATH APPL,POB 577,E-08220 TERRASSA,BARCELONA,SPAIN. RI Magana, Antonio/N-5016-2014; OI Amer, Rafel/0000-0002-7269-1328; Magana, Antonio/0000-0003-0879-0759 NR 6 TC 0 Z9 0 U1 0 U2 0 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0894-069X J9 NAV RES LOG JI Nav. Res. Logist. PD FEB PY 1996 VL 43 IS 1 BP 103 EP 118 PG 16 WC Operations Research & Management Science SC Operations Research & Management Science GA TR676 UT WOS:A1996TR67600006 ER PT J AU Golan, H Moore, HJ Grossman, Y AF Golan, H Moore, HJ Grossman, Y TI Pressure exposure unmasks differences in release properties between high and low yield excitatory synapses of a single crustacean axon SO NEUROPHARMACOLOGY LA English DT Article DE hyperbaric pressure; quantal analysis; synaptic kinetics; miniature synaptic currents; glutamatergic transmission; crustacean neuromuscular junction ID NEUROTRANSMITTER RELEASE; NEUROMUSCULAR-JUNCTION; HYDROSTATIC-PRESSURE; CRAYFISH MUSCLE; TRANSMITTER; DIFFERENTIATION; SYNAPTOSOMES; TERMINALS; RECEPTOR AB The cellular mechanisms underlying the effect of high pressure on synaptic transmission at two types of synapses were studied in the opener muscle of the lobster walking leg. Excitatory postsynaptic currents (EPSCs) were recorded using a loose macropatch clamp technique at normal pressure and 3.5, 6.9 MPa helium pressure. Responses of the single excitatory axon could be grouped into two types: low yield (L) synapse exhibiting a small mean EPSC with a considerable number of failures, and high yield (H) synapse having a larger mean EPSC with very few failures. The change in several synaptic transmission parameters indicated that high pressure similarly reduced presynaptic evoked release in both L and H synapses. However, some differences in the kinetics and probability of release could be detected. A major difference was the spontaneous miniature EPSCs (mEPSCs) activity. Many of the mEPSCs, observed only in L synapses, were 'giant' (size of 2-5 q). High pressure selectively increased the frequency of the giant mEPSCs in the L synapse but had little effect on their amplitude histogram. High pressure depressed evoked synaptic transmission in both synapses by modulating the presynaptic quantal release parameters, but concomitantly enhanced spontaneous quantal release in L synapses by an unknown mechanism. C1 BEN GURION UNIV NEGEV,FAC HLTH SCI,ZLOTOWSKI NEUROSCI CTR,DEPT PHYSIOL,IL-84105 BEER SHEVA,ISRAEL. USN,MED RES INST,HIGH PRESSURE MOL & CELLULAR NEUROBIOL GRP,BETHESDA,MD 20889. RI GOLAN, HAVA/F-2121-2012 NR 26 TC 7 Z9 7 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0028-3908 J9 NEUROPHARMACOLOGY JI Neuropharmacology PD FEB PY 1996 VL 35 IS 2 BP 187 EP 193 DI 10.1016/0028-3908(95)00173-5 PG 7 WC Neurosciences; Pharmacology & Pharmacy SC Neurosciences & Neurology; Pharmacology & Pharmacy GA UB109 UT WOS:A1996UB10900009 PM 8734488 ER PT J AU Yang, XY Miceli, WJ AF Yang, XY Miceli, WJ TI Optical engineering in small companies SO OPTICAL ENGINEERING LA English DT Editorial Material C1 OFF NAVAL RES,ARLINGTON,VA 22217. RP Yang, XY (reprint author), UNIV NEW ORLEANS,DEPT ELECT ENGN,NEW ORLEANS,LA 70148, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC PHOTO-OPT INSTRUM ENG PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD FEB PY 1996 VL 35 IS 2 BP 328 EP 329 DI 10.1117/1.600944 PG 2 WC Optics SC Optics GA TV854 UT WOS:A1996TV85400002 ER PT J AU Moeller, RP Burns, WK AF Moeller, RP Burns, WK TI Observation of thermal noise in a dynamically biased fiber-optic gyro SO OPTICS LETTERS LA English DT Article ID GYROSCOPE AB The effect of phase noise caused by thermal fluctuations in optical fiber is observed experimentally in a dynamically biased open-loop fiber-optic gyro. When source noise subtraction is used, thermal noise effects are readily observable. Total noise levels are in good agreement with theory. Contributions from shot, thermal, and electronic noise to the random walk coefficient are calculated, and the total is compared with experiment. RP Moeller, RP (reprint author), USN,RES LAB,CODE 5671,WASHINGTON,DC 20375, USA. NR 14 TC 6 Z9 6 U1 0 U2 6 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD FEB 1 PY 1996 VL 21 IS 3 BP 171 EP 173 DI 10.1364/OL.21.000171 PG 3 WC Optics SC Optics GA TU233 UT WOS:A1996TU23300003 PM 19865342 ER PT J AU Peterson, CM Eichenfield, LF AF Peterson, CM Eichenfield, LF TI Scabies SO PEDIATRIC ANNALS LA English DT Article ID LINDANE C1 USN,MED CTR,DEPT DERMATOL,SAN DIEGO,CA 92152. NR 13 TC 3 Z9 3 U1 0 U2 0 PU SLACK INC PI THOROFARE PA 6900 GROVE RD, THOROFARE, NJ 08086 SN 0090-4481 J9 PEDIATR ANN JI Pediatr. Annu. PD FEB PY 1996 VL 25 IS 2 BP 97 EP 100 PG 4 WC Pediatrics SC Pediatrics GA TU822 UT WOS:A1996TU82200007 PM 8822033 ER PT J AU Prasad, SK Rao, DSS Khened, SM Chandrasekhar, S Naciri, J Shashidhar, R AF Prasad, SK Rao, DSS Khened, SM Chandrasekhar, S Naciri, J Shashidhar, R TI Comparative study of the collective mode dynamics in ferroelectric liquid crystalline monomers and their corresponding copolymers SO PHYSICA A LA English DT Article; Proceedings Paper CT Conference on Dynamics of Complex Systems CY AUG 06-11, 1995 CL S N BOSE CTR BASIC SCI, CALCUTTA, INDIA SP Jawaharlal Nehru Univ, S N Bose Ctr Basic Sci, Saha Inst Nucl Phys HO S N BOSE CTR BASIC SCI ID TRANSITION; VISCOSITY; VICINITY; POLYMERS; PHASE AB A comparative dielectric dispersion study of the soft mode dynamics of monomeric FLC compounds and the corresponding siloxane copolymers is presented. The results show that although the relaxation frequency is two orders of magnitude smaller for the copolymer, the dielectric strength remains the same as in the monomer, supporting our earlier observation that the magnitude of some static properties are not altered by copolymerisation. We also present detailed temperature dependence of the rotational viscosity associated with the ferroelectric switching for two compounds belonging to the same homologous series and their corresponding copolymers. Polymerisation is seen to significantly enhance the magnitude of the rotational viscosity. C1 INDIAN INST SCI,JAWAHARLAL NEHRU CTR ADV SCI RES,BANGALORE 560012,KARNATAKA,INDIA. USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. LVD COLL,RAICHUR,INDIA. RP Prasad, SK (reprint author), CTR LIQUID CRYSTAL RES,POB 1329,BANGALORE 560013,KARNATAKA,INDIA. RI Rao, Shankar/B-1203-2009 NR 14 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4371 J9 PHYSICA A JI Physica A PD FEB 1 PY 1996 VL 224 IS 1-2 BP 24 EP 33 PG 10 WC Physics, Multidisciplinary SC Physics GA TV383 UT WOS:A1996TV38300004 ER PT J AU Sen, S Sinkovits, RS Chakravarti, S AF Sen, S Sinkovits, RS Chakravarti, S TI Relaxation of classical particles in anharmonic multi-well potentials SO PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS LA English DT Article; Proceedings Paper CT Conference on Dynamics of Complex Systems CY AUG 06-11, 1995 CL S N BOSE CTR BASIC SCI, CALCUTTA, INDIA SP Jawaharlal Nehru Univ, S N Bose Ctr Basic Sci, Saha Inst Nucl Phys HO S N BOSE CTR BASIC SCI ID DYNAMICS; SPIN; MODEL; XY AB Using extensive numerical and some exact asymptotic analyses, we argue that the canonical ensemble relaxation of a classical particle in an anharmonic multi-well potential landscape with leading quartic anharmonicity exhibits a 1/t decay to equilibrium. In addition, we provide numerical evidence of algebraic decay of form 1/t(phi), 0 < phi < 1, for stronger leading anharmonicities. Our results have important consequences for relaxation studies in several problems of considerable interest in condensed matter physics such as in the Krumhansl-Schrieffer model of displacive structural phase transitions, and in various complex systems. C1 USN, RES LAB, WASHINGTON, DC 20375 USA. CALIF STATE POLYTECH UNIV POMONA, DEPT PHYS, POMONA, CA 91768 USA. RP Sen, S (reprint author), SUNY BUFFALO, DEPT PHYS, BUFFALO, NY 14260 USA. NR 23 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4371 J9 PHYSICA A JI Physica A PD FEB 1 PY 1996 VL 224 IS 1-2 BP 292 EP 301 DI 10.1016/0378-4371(95)00391-6 PG 10 WC Physics, Multidisciplinary SC Physics GA TV383 UT WOS:A1996TV38300031 ER PT J AU Swandic, JR AF Swandic, JR TI Stochastic analysis of multiple-level recombination luminescence and retrapping in the steady state SO PHYSICAL REVIEW B LA English DT Article ID THERMOLUMINESCENCE; TRAP AB A stochastic formulation of the kinetic model for thermally stimulated luminescence, based on van Kampen's Omega expansion, leads to the set of deterministic macroscopic kinetic equations for the model and to a Fokker-Planck equation that governs the various particle number fluctuations. In the weak source limit the expansions for the steady-state macroscopic particle numbers are of fairly simple form, as are those for the eigenvalues of the system of kinetic equations for the expectation values of the fluctuations, Also in this limit, these eigenvalues (which are just the decay constants in the sums of exponential decays that form the recombination radiation correlation functions) separate into three distinct, experimentally distinguishable, sets. These results have been used [Phys. Rev. B 45, 622 (1992)] to deduce the model parameters for the case of one recombination center and one trapping level; here the analysis is extended to the general case of mu (purely radiative) recombination centers and nu trapping levels whose activation energies are so close that over a suitable temperature range all traps can traffic in electrons with the conduction band. One can still deduce the larger number of model parameters from measurements of the steady-state recombination radiation intensities and their correlation function decay constants at a set of temperatures and electron-hole production rates. It is also shown how to account for nonradiative recombinations and for deep, thermally disconnected traps (which become filled in the steady state). RP Swandic, JR (reprint author), USN,CTR SURFACE WARFARE,CODE 682,WHITE OAK,SILVER SPRING,MD 20903, USA. NR 20 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1996 VL 53 IS 5 BP 2352 EP 2366 DI 10.1103/PhysRevB.53.2352 PG 15 WC Physics, Condensed Matter SC Physics GA TV393 UT WOS:A1996TV39300041 ER PT J AU Boyer, LL AF Boyer, LL TI Molecular-dynamics study of the melting of hexagonal and square lattices in two dimensions SO PHYSICAL REVIEW B LA English DT Article ID CRYSTAL AB Simple pair potentials are discussed which give hexagonal- and square-lattice ground states in two dimensions. Molecular-dynamics calculations for these potentials are used to study transitions between the two lattices and melting. The melting temperature is found to be a minimum near the point where the barrier between the two structures, as a function of lattice strain, is also a minimum. C1 HARVARD UNIV,CAMBRIDGE,MA 02138. RP Boyer, LL (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. NR 18 TC 11 Z9 11 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1996 VL 53 IS 6 BP 3145 EP 3149 DI 10.1103/PhysRevB.53.3145 PG 5 WC Physics, Condensed Matter SC Physics GA TV645 UT WOS:A1996TV64500045 ER PT J AU Klafter, J Shlesinger, MF Zumofen, G AF Klafter, J Shlesinger, MF Zumofen, G TI Beyond Brownian motion SO PHYSICS TODAY LA English DT Article ID ANOMALOUS DIFFUSION; PARTICLES; FLOW C1 OFF NAVAL RES,ARLINGTON,VA 22217. ETH ZURICH,PHYS CHEM LAB,ZURICH,SWITZERLAND. RP Klafter, J (reprint author), TEL AVIV UNIV,SCH CHEM,IL-69978 TEL AVIV,ISRAEL. NR 25 TC 521 Z9 526 U1 3 U2 40 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD FEB PY 1996 VL 49 IS 2 BP 33 EP 39 DI 10.1063/1.881487 PG 7 WC Physics, Multidisciplinary SC Physics GA TU620 UT WOS:A1996TU62000009 ER PT J AU Weitzman, RA AF Weitzman, RA TI Students' evaluation of instruction: Faculty and course effects SO PSYCHOLOGICAL REPORTS LA English DT Article AB For 1,610 classes, mutually exclusive contributions of faculty and course to over-all evaluation of instruction were 45% and 15%, respectively, the remainder of the response variation being due to interaction and error. RP Weitzman, RA (reprint author), USN,POSTGRAD SCH,DEPT SYST MANAGEMENT,555 DYER RD,BLDG 330,ROOM 231,MONTEREY,CA 93943, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PSYCHOLOGICAL REPORTS PI MISSOULA PA P O BOX 9229, MISSOULA, MT 59807 SN 0033-2941 J9 PSYCHOL REP JI Psychol. Rep. PD FEB PY 1996 VL 78 IS 1 BP 242 EP 242 PG 1 WC Psychology, Multidisciplinary SC Psychology GA TY818 UT WOS:A1996TY81800044 ER PT J AU Olkin, CB Elliot, JL Bus, SJ McDonald, SW Dahn, CC AF Olkin, CB Elliot, JL Bus, SJ McDonald, SW Dahn, CC TI Astrometry of single-chord occultations: Application to the 1993 triton event SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article ID NEPTUNE; OBLATENESS; CANDIDATES; URANUS; ORBITS; RINGS AB This paper outlines a method for reducing astrometric data to derive the closest approach time and distance to the center of an occultation shadow for a single observer. The method applies to CCD frames, strip scans or photographic plates and uses a set of field stars of unknown positions to define a common coordinate system for all frames. The motion of the occulting body is used to establish the transformation between this common coordinate system and the celestial coordinate system of the body's ephemeris. This method is demonstrated by application to the Tr60 occultation by Triton on 1993 July 10 UT. Over an interval of four nights that included the occultation time, 80 frames of Triton and Tr60 were taken near the meridian with the U.S. Naval Observatory (USNO) 61-inch astrometric reflector. Application of the method presented here to these data yields a closest approach distance of 359+/-133 km (corresponding to 0.017+/-0.006 arcsec) for the occultation chord obtained with the Kuiper Airborne Observatory (KAO). Comparison of the astrometric closest approach time with the KAO light-curve midtime shows a difference of 2.2+/-4.1 s. Relative photometry of Triton and Tr60, needed for photometric calibration of the occultation light curve, is also presented. C1 USN OBSERV,FLAGSTAFF,AZ 86002. LOWELL OBSERV,FLAGSTAFF,AZ 86001. MIT,DEPT PHYS,CAMBRIDGE,MA 02139. RP Olkin, CB (reprint author), MIT,DEPT EARTH ATMOSPHER & PLANETARY SCI,CAMBRIDGE,MA 02139, USA. OI Olkin, Catherine/0000-0002-5846-716X NR 22 TC 9 Z9 9 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD FEB PY 1996 VL 108 IS 720 BP 202 EP 210 DI 10.1086/133710 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TU731 UT WOS:A1996TU73100011 ER PT J AU Pereira, JK Chait, PG Miller, SF AF Pereira, JK Chait, PG Miller, SF TI Deep pelvic abscesses in children: Transrectal drainage under radiologic guidance SO RADIOLOGY LA English DT Article DE abscess, CT; abscess, percutaneous drainage; abscess, US; interventional procedures, in infants and children; pelvic organs, abscess; pelvic organs, interventional procedure ID GREATER SCIATIC FORAMEN; CATHETER AB PURP0SE: To compare the effectiveness of radiologically guided transrectal drainage (TRD) of deep pelvic abscesses (DPAs) in children with that of percutaneous and surgical techniques. MATERIALS AND METHODS: Treatment results in 57 children with DPAs were retrospectively evaluated. The following procedures were performed: TRD alone (n = 21), TRD and percutaneous drainage (PD) of multiple abscesses (n = 5), PD alone (n = 19), and open surgical drainage (SD) (n = 8). Four patients were treated medically. Most abscesses were due to either perforated appendix or recent appendectomy. Patients believed to have a perforated appendix underwent interval appendectomy 4-6 weeks after TRD or PD. RESULTS: All patients recovered fully. TRD was tolerated better than PD or SD. Patients were usually ambulatory within 24 hours of the TRD procedure and required minimal analgesia. The average hospital stay was 4.2 days with TRD, 8 days with TRD and PD, 6 days with PD, and 10.5 days with SD. CONCLUSION: Radiologically guided TRD is effective in the treatment of DPAs. C1 HOSP SICK CHILDREN,DEPT RADIOL,TORONTO,ON M5G 1X8,CANADA. USN HOSP,DEPT RADIOL,PORTSMOUTH,VA. RP Pereira, JK (reprint author), CHILDRENS HOSP MICHIGAN,DEPT PEDIAT IMAGING,3901 BEAUBIEN BLVD,DETROIT,MI 48201, USA. NR 14 TC 30 Z9 30 U1 0 U2 0 PU RADIOLOGICAL SOC NORTH AMER PI EASTON PA 20TH AND NORTHAMPTON STS, EASTON, PA 18042 SN 0033-8419 J9 RADIOLOGY JI Radiology PD FEB PY 1996 VL 198 IS 2 BP 393 EP 396 PG 4 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA TR363 UT WOS:A1996TR36300019 PM 8596838 ER PT J AU Bowles, JH Duncan, D Walker, DN Amatucci, WE AF Bowles, JH Duncan, D Walker, DN Amatucci, WE TI A large volume microwave plasma source SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID FREQUENCY; CAVITY; DISCHARGES AB We report on the design, construction, and use of a large cavity microwave plasma source. The source is designed to provide a range of space-plasma-like conditions in the Naval Research Laboratory Space Physics Simulation Chamber. A new feature of the source design incorporates hard anodized aluminum as the internal cavity area surface and does not use the conventional quartz cavity liner which is prone to overheating and cracking with extended use. By placing a number of small plasma outlet holes around the surface of a 36.8 cm output plate, we are able to provide a fairly radially uniform plasma; by further surrounding the production region and exit with an axial pinch magnetic field we are able to extend this region of plasma uniformity further toward the chamber walls and cover a significant portion of the experimental area. The source provides plasmas with selectable densities between 10(4) and 10(8) cm(-3) and electron temperatures vary from about 0.5 to 2.0 eV. (C) 1996 American Institute of Physics. RP Bowles, JH (reprint author), USN,RES LAB,DIV PLASMA PHYS,CHARGED PARTICLE PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 13 TC 14 Z9 14 U1 1 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD FEB PY 1996 VL 67 IS 2 BP 455 EP 461 DI 10.1063/1.1146612 PG 7 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA TX389 UT WOS:A1996TX38900023 ER PT J AU Li, SH Fan, SX McKenna, TM AF Li, SH Fan, SX McKenna, TM TI Role of nitric oxide in sepsis-induced hyporeactivity in isolated rat lungs SO SHOCK LA English DT Article ID VASCULAR TONE; SEPTIC SHOCK; SYNTHASE; INHIBITION; LIPOPOLYSACCHARIDE; ANGIOTENSIN; MACROPHAGE; INDUCTION; MODELS AB The aim of the present study was to test the hypothesis that pulmonary microvascular reactivity is depressed in sepsis and that inducible nitric oxide synthase (iNOS) contributes to the vascular hyporeactivity. Rats were made septic by cecal ligation and puncture, After 16 h, pulmonary vascular reactivity was evaluated by measurement of perfusion pressures while the vasculature was challenged with angiotensin II and KCI. The results showed that Vascular reactivity was significantly depressed in lungs from septic rats in comparison to sham-operated controls. Pretreatment with the nitric oxide synthase inhibitor N-G-nitro-L-arginine methyl ester (L-NAME, 100 mu M) restored the depressed vasoreactivity while the nitric oxide (NO) synthase substrate L-arginine (1 mM) reversed the contraction-restoring effect of L-NAME. NO production in lungs from septic rats increased about 4-fold in comparison to sham-operated controls. iNOS protein was expressed in lung tissues, mainly the resistance vessels, from septic rats but not from sham-operated controls. Reverse transcription and polymerase chain reaction also showed a strong induction of iNOS mRNA in lung tissues from septic rats. These results suggest that increased INOS expression and NO production may contribute to depressed pulmonary vascular reactivity in sepsis. C1 USN,MED RES INST,SEPT SHOCK RES PROGRAM,BETHESDA,MD 20889. NR 38 TC 30 Z9 31 U1 0 U2 0 PU BIOMEDICAL PRESS PI AUGUSTA PA 1021 15TH ST, BIOTECH PARK STE 9, AUGUSTA, GA 30901 SN 1073-2322 J9 SHOCK JI Shock PD FEB PY 1996 VL 5 IS 2 BP 122 EP 129 PG 8 WC Critical Care Medicine; Hematology; Surgery; Peripheral Vascular Disease SC General & Internal Medicine; Hematology; Surgery; Cardiovascular System & Cardiology GA TX283 UT WOS:A1996TX28300007 PM 8705389 ER PT J AU Xiong, GC Bhagat, SM Li, Q Dominguez, M Ju, HL Greene, RL Venkatesan, T Byers, JM Rubinstein, M AF Xiong, GC Bhagat, SM Li, Q Dominguez, M Ju, HL Greene, RL Venkatesan, T Byers, JM Rubinstein, M TI Anomalous magnetoconductivity of epitaxial Nd0.7Sr0.3MnO3 and Pr0.7Sr0.3MnO3 films SO SOLID STATE COMMUNICATIONS LA English DT Article DE magnetically ordered materials ID MAGNETORESISTANCE AB In Nd0.7Sr0.3MnO3 films, ranging in peak resistivity from 1000 Ohm . cm to less than or equal to 1 Ohm . cm, and exhibiting large magnetoresistance effects, the zero-field resistivity above the peak temperature T-p exhibits thermally activated behavior with an activation energy of 0.115+/-0.005 eV. At T well below T-p, the magnetoconductivity, rather than the magnetoresistance, is linear in B and this linear dependence is observed over a wide B range even when the magnetization is essentially saturated. A cross-over from the linear relation to sigma increasing as B-2 is observed near and above T-p. A tentative model is proposed. C1 USN, RES LAB, WASHINGTON, DC 20375 USA. BEIJING UNIV, DEPT PHYS, BEIJING 100871, PEOPLES R CHINA. BEIJING UNIV, NATL MESOSCOP PHYS LAB, BEIJING 100871, PEOPLES R CHINA. UNIV CADIZ, DEPT CONDENSED MATTER PHYS, E-11510 PUERTO REAL, CADIZ, SPAIN. UNIV MARYLAND, DEPT ELECT ENGN, COLLEGE PK, MD 20742 USA. RP UNIV MARYLAND, CTR SUPERCONDUCT RES, DEPT PHYS, COLLEGE PK, MD 20742 USA. RI Venkatesan, Thirumalai/E-1667-2013; Dominguez, Manuel/K-8119-2014 OI Dominguez, Manuel/0000-0002-7889-7220 NR 21 TC 27 Z9 27 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-1098 EI 1879-2766 J9 SOLID STATE COMMUN JI Solid State Commun. PD FEB PY 1996 VL 97 IS 7 BP 599 EP 604 DI 10.1016/0038-1098(95)00715-6 PG 6 WC Physics, Condensed Matter SC Physics GA TN250 UT WOS:A1996TN25000011 ER PT J AU Siatkowski, RE AF Siatkowski, RE TI Not so fast! SO SPECTROSCOPY LA English DT Letter C1 USN ACAD,ANNAPOLIS,MD 21402. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ADVANSTAR COMMUNICATIONS PI DULUTH PA 131 W FIRST ST, DULUTH, MN 55802 SN 0887-6703 J9 SPECTROSCOPY JI Spectroscopy PD FEB PY 1996 VL 11 IS 2 BP 10 EP 10 PG 1 WC Spectroscopy SC Spectroscopy GA VJ161 UT WOS:A1996VJ16100002 ER PT J AU Mintmire, JW White, CT AF Mintmire, JW White, CT TI Electronic structure simulations of carbon nanotubes SO SYNTHETIC METALS LA English DT Article; Proceedings Paper CT Symposium K on Fullerenes - From New Molecules to New Materials of the 1995 E-MRS Spring Conference CY MAY 22-26, 1995 CL STRASBOURG, FRANCE SP European Mat Res Soc, Council Europe, Commiss European Communities DE fullerene; carbon nanotubes; nanotubes; structure; simulations ID NANOSCALE GRAPHITIC TUBULES; POLYACETYLENE; SPECTRA; GROWTH; C-60 AB Recently, Iijima et al. (Nature, 363 (1993) 603) and Bethune et al. (Nature, 363 (1993) 605) have found carbon-are conditions that yield extended single-shell nanometer-diameter carbon fibers. The individual hollow concentric graphitic tubules which comprise these fibers can be visualized as constructed from rolled-up single sheets of graphite. We have examined both the electronic and structural properties of these materials using a first-principles, self-consistent, all-electron Gaussian-orbital-based local-density functional (LDF) approach. As part of these studies, we have calculated the optical absorption spectra of several representative nanotubes using an Ehrenreich-Cohen perturbation-theory approach using the LDF electronic structure results. We discuss these results in the light of recent experimental results for electron energy-loss spectra of these novel materials. RP Mintmire, JW (reprint author), USN,RES LAB,CODE 6179,WASHINGTON,DC 20375, USA. OI Mintmire, John/0000-0002-6551-0349 NR 30 TC 37 Z9 38 U1 1 U2 6 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0379-6779 J9 SYNTHETIC MET JI Synth. Met. PD FEB PY 1996 VL 77 IS 1-3 BP 231 EP 234 DI 10.1016/0379-6779(96)80094-4 PG 4 WC Materials Science, Multidisciplinary; Physics, Condensed Matter; Polymer Science SC Materials Science; Physics; Polymer Science GA UF677 UT WOS:A1996UF67700051 ER PT J AU Edelman, MJ Potter, P Mahaffey, KG Frink, R Leidich, RB AF Edelman, MJ Potter, P Mahaffey, KG Frink, R Leidich, RB TI The potential for reintroduction of tumor cells during intraoperative blood salvage: Reduction of risk with use of the RC-400 leukocyte depletion filter SO UROLOGY LA English DT Article ID AUTO-TRANSFUSION; AUTOLOGOUS TRANSFUSION; AUTOTRANSFUSION; SURGERY; CANCER AB Objectives. Intraoperative autotransfusion of shed blood is widely utilized in surgery. However, several studies have raised concern about the transmission of tumor cells during oncologic procedures. We compared the ability of a leukocyte depletion filter (RC-400; LDF) to a standard red blood cell filter (SBF) to remove tumor cells derived from urologic malignancies. Methods. Cells were suspended in media and passed through a SBF or a LDF. The filtrate was evaluated for the presence of viable cells utilizing the trypan blue exclusion method as well as cell culture. in a second experiment, cells were suspended in fresh bovine blood and processed through a cell saver apparatus followed by filtration with either a SBF or a LDF, Aliquots were cultured after admixture with blood, after processing, and after filtration. Results. The LDF was able to remove tumor cells completely, as demonstrated by both counting with the trypan blue exclusion test and by cell culture. In contrast, admixture with blood, processing through the cell saver apparatus nor a standard red blood cell filter removed these cells. Conclusions. Tumor cells derived from urologic malignancies are easily removed with a LDF but not with a SBF. Filtration of blood salvaged at the time of uro-oncologic surgery with a LDF but not with a SBF reduces the potential for reinfusion of viable tumor cells. C1 UNIV CALIF DAVIS,VET AFFAIRS NO CALIF HLTH CARE SYST,DIV HEMATOL ONCOL,DAVIS,CA 95616. USN,MED CTR,DEPT ANESTHESIA,SAN DIEGO,CA 92152. USN HOSP,DEPT UROL,AGANA,GU. USN,MED CTR,DEPT UROL,OAKLAND,CA. TEXAS TECH UNIV,DEPT UROL,LUBBOCK,TX 79409. NR 14 TC 60 Z9 68 U1 0 U2 1 PU CAHNERS PUBL CO PI NEW YORK PA 249 WEST 17 STREET, NEW YORK, NY 10011 SN 0090-4295 J9 UROLOGY JI UROLOGY PD FEB PY 1996 VL 47 IS 2 BP 179 EP 181 DI 10.1016/S0090-4295(99)80411-7 PG 3 WC Urology & Nephrology SC Urology & Nephrology GA TW787 UT WOS:A1996TW78700005 PM 8607229 ER PT J AU Marrian, CRK Perkins, FK McCarthy, D Bass, R AF Marrian, CRK Perkins, FK McCarthy, D Bass, R TI Electron energy loss in thin metallic films SO APPLIED PHYSICS LETTERS LA English DT Article ID LITHOGRAPHY AB Schottky diodes with patterned overlayers of thin metal films have provided a method to measure the energy loss of high energy electrons in the metal films. The technique avoids the problems of surface contamination and electron collection which complicate measurements on freestanding films. The patterned overlayer creates a modulation in the reverse biased diode current as a beam of focused electrons is moved across the diode surface. The amplitude of the modulation has been measured with overlayers of aluminum and gold for incident electron energies of 5 to 30 keV. The results have been compared to that predicted from a Monte Carlo calculation of the inelastic and elastic scattering of the incident electrons. Significantly better agreement between experiment and simulation is observed when the screened Rutherford cross section in the Monte Carlo code is replaced by an empirical expression for the Mott scattering formula. (C) 1996 American Institute of Physics. RP Marrian, CRK (reprint author), USN,RES LAB,NANOELECTR PROC FACIL,CODE 6804,WASHINGTON,DC 20375, USA. NR 16 TC 4 Z9 4 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JAN 29 PY 1996 VL 68 IS 5 BP 678 EP 680 DI 10.1063/1.116589 PG 3 WC Physics, Applied SC Physics GA TR801 UT WOS:A1996TR80100035 ER PT J AU Wang, YM Hawley, SH Sheeley, NR AF Wang, YM Hawley, SH Sheeley, NR TI The magnetic nature of coronal holes SO SCIENCE LA English DT Article ID SOLAR-WIND SPEED; TRANSITION REGION; PLASMA PROPERTIES; SUNSPOT-CYCLE; EVOLUTION; FIELDS; MODELS; SUN; POINTS; FLOW AB Solar wind streams originate from low-density, magnetically open regions of the sun's corona, known as coronal holes. The locations, areal sizes, rotation, and solar-cycle evolution of these regions can be reproduced and understood by applying simple extrapolation models to measurements of the photospheric magnetic field, The surprisingly rigid rotation displayed by many coronal holes suggests that field-line reconnection occurs continually in the corona, despite the high electrical conductivity of the coronal plasma, The magnetic field strengths and field-line divergence rates in coronal holes can be related empirically to the bulk speed and the mass and energy flux densities of the solar wind plasma. Such relations may help to illuminate the physical processes responsible for heating the corona and driving the solar wind. C1 UNIV TEXAS, DEPT PHYS, AUSTIN, TX 78712 USA. RP Wang, YM (reprint author), USN, RES LAB, EO HULBURT CTR SPACE RES, CODE 7672, WASHINGTON, DC 20375 USA. NR 66 TC 139 Z9 140 U1 0 U2 6 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 EI 1095-9203 J9 SCIENCE JI Science PD JAN 26 PY 1996 VL 271 IS 5248 BP 464 EP 469 DI 10.1126/science.271.5248.464 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TR322 UT WOS:A1996TR32200030 ER PT J AU Linnen, J Wages, J ZhangKeck, ZY Fry, KE Krawczynski, KZ Alter, H Koonin, E Gallagher, M Alter, M Hadziyannis, S Karayiannis, P Fung, K Nakatsuji, Y Shih, JWK Young, L Piatak, M Hoover, C Fernandez, J Chen, S Zou, JC Morris, T Hyams, KC Ismay, S Lifson, JD Hess, G Foung, SKH Thomas, H Bradley, D Margolis, H Kim, JP AF Linnen, J Wages, J ZhangKeck, ZY Fry, KE Krawczynski, KZ Alter, H Koonin, E Gallagher, M Alter, M Hadziyannis, S Karayiannis, P Fung, K Nakatsuji, Y Shih, JWK Young, L Piatak, M Hoover, C Fernandez, J Chen, S Zou, JC Morris, T Hyams, KC Ismay, S Lifson, JD Hess, G Foung, SKH Thomas, H Bradley, D Margolis, H Kim, JP TI Molecular cloning and disease association of hepatitis G virus: A transfusion-transmissible agent SO SCIENCE LA English DT Article ID NON-B-HEPATITIS; C VIRUS; NON-A; CDNA LIBRARIES; ANTIBODY; RNA; IDENTIFICATION; CONSTRUCTION; PROTEINASE; SEQUENCES AB An RNA virus, designated hepatitis G virus (HGV), was identified from the plasma of a patient with chronic hepatitis. Extension from an immunoreactive complementary DNA clone yielded the entire genome (9392 nucleotides) encoding a polyprotein of 2873 amino acids. The virus is closely related to GB virus C (GBV-C) and distantly related to hepatitis C virus, GBV-A, and GBV-B. HGV was associated with acute and chronic hepatitis. Persistent viremia was detected for up to 9 years in patients with hepatitis. The virus is transfusion-transmissible. It has a global distribution and is present within the volunteer blood donor population in the United States. C1 GENELABS TECHNOL,REDWOOD CITY,CA 94063. CTR DIS CONTROL & PREVENT,HEPATITIS BRANCH,ATLANTA,GA 30333. NIH,DEPT TRANSFUS MED,BETHESDA,MD 20205. NATL LIB MED,NATL CTR BIOTECHNOL INFORMAT,BETHESDA,MD 20894. HIPPOKRATEION HOSP,ACAD DEPT MED,ATHENS,GREECE. ST MARYS HOSP,SCH MED,DEPT MED,LONDON,ENGLAND. USN,MED RES INST,ROCKVILLE,MD 20852. NEW S WALES RED CROSS BLOOD TRANSFUS SERV,SYDNEY,NSW,AUSTRALIA. BOEHRINGER MANNHEIM GMBH,D-68305 MANNHEIM,GERMANY. RI Thomas, Howard/A-3152-2009 NR 31 TC 1249 Z9 1330 U1 0 U2 15 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JAN 26 PY 1996 VL 271 IS 5248 BP 505 EP 508 DI 10.1126/science.271.5248.505 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TR322 UT WOS:A1996TR32200042 PM 8560265 ER PT J AU Archibald, DD Qadri, SB Gaber, BP AF Archibald, DD Qadri, SB Gaber, BP TI Modified calcite deposition due to ultrathin organic films on silicon substrates SO LANGMUIR LA English DT Article ID LANGMUIR MONOLAYERS; ORIENTED CRYSTALLIZATION; COMPRESSED MONOLAYERS; CRYSTALS; NUCLEATION; MORPHOLOGY; GROWTH; CACO3; BIOMINERALIZATION; PHOSPHONATE AB In order to study the effect of organic surface chemistry on calcite nucleation, attachment, and growth, calcium carbonate was precipitated in the presence of various ultrathin-film organosilane-modified silicon wafers. The chemistry of the aminosilane surfaces was systematically changed by the coupling of various acidic molecules, without creating a geometric lattice of acidic functional groups. Optical microscopy, scanning electron microscopy with image analysis, and X-ray scattering were employed to characterize crystallite density and orientation normal to the surface. Calcite grown on amino-modified surfaces was produced with the equilibrium rhombohedral habit and had the [104] orientation. Surfaces of the silicon oxide, carboxylate, iminodiacetate, or phosphoramidate tended to favor the orientation of surface crystals along [001] or near the [001] axes of the crystal. Primarily this is a result of the affinity of the surface for cations, but functional-group-mediated ion ordering and/or stereochemical matching is also suggested by the much greater amount of crystal nucleation on the long-chain carboxylates when compared to short-chain carboxylates. Coupling of nitrilotriacetic acid (NTA) favored appearance of [110], [113], and [116] oriented crystals when compared to the other acid surfaces. Growth of calcite with relatively larger {110} faces was observed when the microcrystals were synthesized in the presence of freely soluble NTA. Appearance of these faces is a result of a relatively suppressed growth rate due to face-specific adsorption on the growing crystallites. Similarly, the enhancement of specific crystal surface binding by the substrate bound NTA is probably the mechanism influencing orientation of surface microcrystals. Two common structural features of the {110}, {113}, and {116} faces are the tilt of the carbonate plane at large angles from the face and the same angle of rotation of the carbonates about their 3-fold symmetry axes. That angle may enhance the ability of two NTA carboxylates to simultaneously occupy carbonate sites of these calcite faces. The fact that crystallite density and orientation are influenced by submonolayers of functional groups attests to the importance of electrostatic and stereochemical recognition of certain crystal faces even without matching of the geometric lattice. C1 USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,WASHINGTON,DC 20375. RP Archibald, DD (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,LAB MOLEC INTERFACIAL INTERACT,CODE 6930,WASHINGTON,DC 20375, USA. NR 32 TC 123 Z9 126 U1 2 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD JAN 24 PY 1996 VL 12 IS 2 BP 538 EP 546 DI 10.1021/la950330a PG 9 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA TT763 UT WOS:A1996TT76300045 ER PT J AU Bennett, BR Magno, R Shanabrook, BV AF Bennett, BR Magno, R Shanabrook, BV TI Molecular beam epitaxial growth of InSb, GaSb, and AlSb nanometer-scale dots on GaAs SO APPLIED PHYSICS LETTERS LA English DT Article AB Thin layers of InSb, GaSb, and AlSb were grown on GaAs substrates by molecular beam epitaxy. Atomic force microscopy was used to examine surface morphology as a function of growth temperature and monolayer coverage. For each material, conditions were found which resulted in Stranski-Krastanov growth with the strain-induced formation of nanometer-scale dots. Relatively uniform distributions of dots form in a temperature window near the congruent sublimation temperature for both InSb and GaSb. In the case of InSb,deposition of 2 monolayers at 430 degrees C produced a surface with 3X10(9)/cm(2) bets with heights of 58+/-5 Angstrom and diameters of 600+/-50 Angstrom. RP Bennett, BR (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Bennett, Brian/A-8850-2008 OI Bennett, Brian/0000-0002-2437-4213 NR 19 TC 112 Z9 114 U1 0 U2 11 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JAN 22 PY 1996 VL 68 IS 4 BP 505 EP 507 DI 10.1063/1.116381 PG 3 WC Physics, Applied SC Physics GA TQ550 UT WOS:A1996TQ55000025 ER PT J AU Perkins, FK Dobisz, EA Brandow, SL Calvert, JM Kosakowski, JE Marrian, CRK AF Perkins, FK Dobisz, EA Brandow, SL Calvert, JM Kosakowski, JE Marrian, CRK TI Fabrication of 15 nm wide trenches in Si by vacuum scanning tunneling microscope lithography of an organosilane self-assembled film and reactive ion etching SO APPLIED PHYSICS LETTERS LA English DT Article ID BEAM AB Organosilane precursor molecules, here (aminoethylaminomethyl)phenethyltrimethoxysilane, or PEDA, are chemisorbed onto a Si surface forming a monolayer thick film, These films are patterned using the scanning tunneling microscope to locally modify the chemical reactivity and are then used as a template for selective electroless plating of a thin Ni film. Reactive ion etching in a C2F6/O-2 mixture transfers this pattern into the substrate. Improvement over previous lithographic performance is achieved by growing the films on a passivated and lightly oxidized Si surface, optimizing the patterning conditions, and improving the metallization and etch chemistry. In this way, we have generated deep trenches on the order of 15+/-4 nm width, with edge roughness of 3 nm. We believe this demonstrates the resolution limiting factors of this lithographic process. (C) 1996 American Institute of Physics. C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. SFA INC,LANDOVER,MD 20785. USN,RES LAB,NANOELECTR PROC FACIL,WASHINGTON,DC 20375. RP Perkins, FK (reprint author), USN,RES LAB,DIV ELECTR SCI & TECHNOL,CODE 6864,4555 OVERLOOK AVE SW,WASHINGTON,DC 20375, USA. NR 16 TC 66 Z9 66 U1 1 U2 12 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JAN 22 PY 1996 VL 68 IS 4 BP 550 EP 552 DI 10.1063/1.116396 PG 3 WC Physics, Applied SC Physics GA TQ550 UT WOS:A1996TQ55000040 ER PT J AU Abe, K Akagi, T Anthony, PL Antonov, R Arnold, RG Averett, T Band, HR Bauer, JM Borel, H Bosted, PE Breton, V ButtonShafer, J Chen, JP Chupp, TE Clendenin, J Comptour, C Coulter, KP Court, G Crabb, D Daoudi, M Day, D Dietrich, FS Dunne, J Dutz, H Erbacher, R Fellbaum, J Feltham, A Fonvieille, H Frlez, E Garvey, D Gearhart, R Gomez, J Grenier, P Griffioen, KA Hoibraten, S Hughes, EW HydeWright, C Johnson, JR Kawall, D Klein, A Kuhn, SE Kuriki, M Lindgren, R Liu, TJ LombardNelsen, RM Marroncle, J Maruyama, T Maruyama, XK McCarthy, J Meyer, W Meziani, ZE Minehart, R Mitchell, J Morgenstern, J Petratos, GG Pitthan, R Pocanic, D Prescott, C Prepost, R Raines, P Raue, B Reyna, D Rijllart, A Roblin, Y Rochester, LS Rock, SE Rondon, OA Sick, I Smith, LC Smith, TB Spengos, M Staley, F Steiner, P StLorant, S Stuart, LM Suekane, F Szalata, ZM Tang, H Terrien, Y Usher, T Walz, D White, JL Witte, K Young, CC Youngman, B Yuta, H Zapalac, G Zihlmann, B Zimmermann, D AF Abe, K Akagi, T Anthony, PL Antonov, R Arnold, RG Averett, T Band, HR Bauer, JM Borel, H Bosted, PE Breton, V ButtonShafer, J Chen, JP Chupp, TE Clendenin, J Comptour, C Coulter, KP Court, G Crabb, D Daoudi, M Day, D Dietrich, FS Dunne, J Dutz, H Erbacher, R Fellbaum, J Feltham, A Fonvieille, H Frlez, E Garvey, D Gearhart, R Gomez, J Grenier, P Griffioen, KA Hoibraten, S Hughes, EW HydeWright, C Johnson, JR Kawall, D Klein, A Kuhn, SE Kuriki, M Lindgren, R Liu, TJ LombardNelsen, RM Marroncle, J Maruyama, T Maruyama, XK McCarthy, J Meyer, W Meziani, ZE Minehart, R Mitchell, J Morgenstern, J Petratos, GG Pitthan, R Pocanic, D Prescott, C Prepost, R Raines, P Raue, B Reyna, D Rijllart, A Roblin, Y Rochester, LS Rock, SE Rondon, OA Sick, I Smith, LC Smith, TB Spengos, M Staley, F Steiner, P StLorant, S Stuart, LM Suekane, F Szalata, ZM Tang, H Terrien, Y Usher, T Walz, D White, JL Witte, K Young, CC Youngman, B Yuta, H Zapalac, G Zihlmann, B Zimmermann, D TI Measurements of the proton and deuteron spin structure function g(2) and asymmetry A(2) SO PHYSICAL REVIEW LETTERS LA English DT Article ID DEEP INELASTIC-SCATTERING; POLARIZED NUCLEONS; POWER CORRECTIONS; SUM-RULES; EVOLUTION; LEPTONS AB We have measured proton and deuteron virtual photon-nucleon asymmetries A(2)(p) and A(2)(d) and structure functions g(2)(p) and g(2)(d) over the range 0.03 < x < 0.8 and 1.3 < Q(2) < 10 (GeV/c)(2) by inelastically scattering polarized electrons off polarized ammonia targets. Results for A(2) are significantly smaller than the positivity limit root R for both targets. Within experimental precision the g(2) data are well described by the Twist-2 contribution, g(2)(WW). Twist-3 matrix elements have been extracted and are compared to theoretical predictions. C1 UNIV BASEL, INST PHYS, CH-4056 BASEL, SWITZERLAND. UNIV CLERMONT FERRAND, LPC IN2P3, CNRS, F-63170 CLERMONT FERRAND, FRANCE. CEBAF, NEWPORT NEWS, VA 23606 USA. DAPNIA, SERV PHYS NUCL, CTR ETUD SACLAY, F-91191 GIF SUR YVETTE, FRANCE. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. UNIV MASSACHUSETTS, AMHERST, MA 01003 USA. UNIV MICHIGAN, ANN ARBOR, MI 48109 USA. USN, POSTGRAD SCH, MONTEREY, CA 93943 USA. OLD DOMINION UNIV, NORFOLK, VA 23529 USA. UNIV PENN, PHILADELPHIA, PA 19104 USA. STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA. STANFORD UNIV, STANFORD, CA 94305 USA. TEMPLE UNIV, PHILADELPHIA, PA 19122 USA. TOHOKU UNIV, SENDAI, MIYAGI 980, JAPAN. UNIV VIRGINIA, CHARLOTTESVILLE, VA 22901 USA. UNIV WISCONSIN, MADISON, WI 53706 USA. RP Abe, K (reprint author), AMERICAN UNIV, WASHINGTON, DC 20016 USA. RI Averett, Todd/A-2969-2011; Rondon Aramayo, Oscar/B-5880-2013; Frlez, Emil/B-6487-2013; Day, Donal/C-5020-2015 OI Day, Donal/0000-0001-7126-8934 NR 37 TC 142 Z9 142 U1 0 U2 0 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 22 PY 1996 VL 76 IS 4 BP 587 EP 591 DI 10.1103/PhysRevLett.76.587 PG 5 WC Physics, Multidisciplinary SC Physics GA TQ527 UT WOS:A1996TQ52700008 ER PT J AU Szpak, S MosierBoss, PA Smith, JJ AF Szpak, S MosierBoss, PA Smith, JJ TI On the behavior of the cathodically polarized Pd/D system: Search for emanating radiation SO PHYSICS LETTERS A LA English DT Article ID DEUTERIUM; FUSION AB Evidence for the emission of low intensity X-rays during cathodic polarization of the Pd/D system(s) is presented. The Pd/D system was prepared by charging with electrochemically generated deuterium either palladium foil or palladium electrodeposited from DzO electrolytes. Experimental and analytical procedures are described in detail. C1 USN,COMMAND CONTROL & OCEAN SURVEILLENCE CTR,RDT & E DIV,SAN DIEGO,CA 92152. US DOE,WASHINGTON,DC 20585. NR 10 TC 14 Z9 14 U1 0 U2 1 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 22 PY 1996 VL 210 IS 6 BP 382 EP 390 DI 10.1016/0375-9601(95)00915-9 PG 9 WC Physics, Multidisciplinary SC Physics GA TR543 UT WOS:A1996TR54300003 ER PT J AU Poirier, P Hanson, F AF Poirier, P Hanson, F TI Discretely tunable multiwavelength diode-pumped Nd:YALO laser SO APPLIED OPTICS LA English DT Article DE multiwavelength; ultraviolet; tunable; diode pumped ID YAG LASER AB Operation of a moderate-to-high repetition-rate Q-switched quadrupled diode-pumped Nd:YALO laser discretely tunable between 266 and 275 nm is reported. Intracavity frequency doubling of the fundamental yielded 5.4 and 4.4 mJ at 532 and 550 nm, respectively, at a 600-Hz repetition rate. The laser radiation was frequency quadrupled to the UV external to the cavity with an output of 0.28 and 0.24 mJ at 266 and 275 nm, respectively. Astigmatic focal lengths that are due to thermal lensing effects of the Nd:YALO rod in the side-pumping geometry are presented. RP Poirier, P (reprint author), USN,COMMAND CONTROL & OCEAN SURVEILLANCE CTR,RES DEV TEST & EVALUAT DIV,CODE 853,SAN DIEGO,CA 92152, USA. NR 10 TC 3 Z9 3 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD JAN 20 PY 1996 VL 35 IS 3 BP 364 EP 367 DI 10.1364/AO.35.000364 PG 4 WC Optics SC Optics GA TR972 UT WOS:A1996TR97200003 PM 21069019 ER PT J AU Lee, ZP Carder, KL Peacock, TG Davis, CO Mueller, JL AF Lee, ZP Carder, KL Peacock, TG Davis, CO Mueller, JL TI Method to derive ocean absorption coefficients from remote-sensing reflectance SO APPLIED OPTICS LA English DT Article DE remote-sensing reflectance; simulation of pigment absorption coefficients; diffuse attenuation coefficients ID DISSOLVED ORGANIC-MATTER; OPTICAL-PROPERTIES; BIOGENOUS MATTER; NATURAL-WATERS; IN-WATER; PHYTOPLANKTON; MODEL; COLOR; SEA; CHLOROPHYLL AB A method to derive in-water absorption coefficients from total remote-sensing reflectance (ratio of the upwelling radiance to the downwelling irradiance above the surface) analytically is presented. For measurements made in the Gulf of Mexico and Monterey Bay, with concentrations of chlorophyll-a ranging from 0.07 to 50 mg/m(3), comparisons are made for the total absorption coefficients derived with the suggested method and those derived with diffuse attenuation coefficients. For these coastal to open-ocean waters, including regions of upwelling and the Loop Current, the results are as follows: at 440 nm the difference between the two methods is 13.0% (r(2) = 0.96) for total absorption coefficients ranging from 0.02 to 2.0 m(-1); at 488 nm the difference is 14.5% (r(2) = 0.97); and at 550 nm the difference is 13.6% (r(2) = 0.96). The results indicate that the method presented works very well for retrieval of in-water absorption coefficients exclusively from remotely measured signals, and that this method has a wide range of potential applications in oceanic remote sensing. C1 USN,RES LAB,WASHINGTON,DC 20375. SAN DIEGO STATE UNIV,CTR HYDROOPT & REMOTE SENSING,SAN DIEGO,CA 92120. RP Lee, ZP (reprint author), UNIV S FLORIDA,DEPT MARINE SCI,140 7TH AVE S,ST PETERSBURG,FL 33701, USA. NR 35 TC 78 Z9 95 U1 2 U2 9 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD JAN 20 PY 1996 VL 35 IS 3 BP 453 EP 462 DI 10.1364/AO.35.000453 PG 10 WC Optics SC Optics GA TR972 UT WOS:A1996TR97200014 PM 21069030 ER PT J AU Urban, SE Corbin, TE AF Urban, SE Corbin, TE TI New reductions of the Astrographic Catalogue - Conventional plate adjustment of the Cape Zone SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE catalogs; astrometry; methods, data analysis AB The U. S. Naval Observatory is in the process of making new reductions of the Astrographic Catalogue using a modern reference star system, the ACRS, created specifically for that purpose. The application of that system to the plates of the Cape Zone is discussed as well as the software that has been developed to make the reductions. An analysis of scale, rotation, tilt, coma, magnitude equation, radial distortion and distortions introduced by the use of reseaux in the Carte du Ciel program is made for each plate. The result is a catalog of 544 629 stars from plates taken at the Cape Observatory between 1897 and 1911 on the system of FK5 J2000. The average standard deviations of an individual plate image after reduction are 0 ''.31 in right ascension and 0 ''.28 in declination. Thus the positions of the Cape Zone, and of the other zones subsequently to be reduced, can be combined with modern astrometric catalogs to give accurate proper motions for large numbers of stars. RP Urban, SE (reprint author), USN OBSERV, 3450 MASSACHUSETTS AVE NW, WASHINGTON, DC 20392 USA. NR 17 TC 9 Z9 9 U1 0 U2 0 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 20 PY 1996 VL 305 IS 3 BP 989 EP 998 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TR769 UT WOS:A1996TR76900043 ER PT J AU Clegg, AW Fey, AL Fiedler, RL AF Clegg, AW Fey, AL Fiedler, RL TI VLA polarization observations of the extragalactic source 1741-038 during an extreme scattering event SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, magnetic fields; ISM, structure; plasmas ID RADIO-SOURCES; INTERSTELLAR-MEDIUM; ROTATION MEASURES AB The extragalactic radio source 1741-038 underwent an extreme scattering event in 1992. Near the middle of the event and 1.5 yr after the end of the event we obtained Faraday rotation observations of this source. The results are consistent with no change in rotation measure during the scattering event. Many models of extreme scattering events suggest that the events are due to strong refraction by an intervening plasma irregularity in the Galactic interstellar medium. If the irregularity is moving with a typical interstellar velocity of 100 km s(-1), and located 1 kpc distant, we constrain the mean parallel component of the magnetic field within the refractor to be less than or similar to 40 mu G. While the general interstellar field is substantially less than this value (about 2 mu G), the field strength within a shock-induced irregularity is expected to be greatly increased over typical interstellar values. The constraint on the mean parallel field within the refractor is much tighter (less than or similar to 4 mu G) if the refractor is associated with the North Polar Spur. C1 USN OBSERV,WASHINGTON,DC 20392. RP Clegg, AW (reprint author), USN,RES LAB,CODE 7213,WASHINGTON,DC 20375, USA. NR 13 TC 12 Z9 12 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 20 PY 1996 VL 457 IS 1 BP L23 EP L26 PN 2 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TP706 UT WOS:A1996TP70600006 ER PT J AU Gaume, RA Wilson, TL Johnston, KJ AF Gaume, RA Wilson, TL Johnston, KJ TI Non-LTE effects in ammonia SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, clouds; ISM, individual (DR 21); ISM, molecules; masers; molecular data; molecular processes; radio lines, ISM ID INTENSITY ANOMALIES; DR-21 AB The non-LTE effects in the NH3 (J, K) = (1, 1) absorption toward the DR 21 H II region have been investigated using a spatial resolution of 1''.7-3''. The anomalies, found in the satellite hyperfine (HF) components, indicate significant, widespread departures from LTE. We present images of the LTE departure for the inner and outer pairs of NH3 (1, 1) HF components toward the H II region and find, surprisingly, that the degree of LTE departure for these HF components is spatially anticorrelated. Previous models predicted a spatial correlation. This unexpected result may be explained by a dynamic model involving both the infall and outflow of molecular material. Although weak emission in the redshifted outer HF component is widespread toward the continuum, an unresolved, high brightness temperature (greater than or equal to 600 K) maser is found just southwest of the continuum peak. This is the first proven instance of an interstellar maser in the NH3 (1, 1) level. The flux density of the maser is larger than the absolute value of the flux density of any of the other HF components (seen in absorption), including the main component. C1 MAX PLANCK INST RADIOASTRON,D-53010 BONN,GERMANY. UNIV ILLINOIS,DEPT ASTRON,URBANA,IL 61801. RP Gaume, RA (reprint author), USN OBSERV,3450 MASSACHUSETTS AVE NW,WASHINGTON,DC 20392, USA. NR 12 TC 6 Z9 6 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 20 PY 1996 VL 457 IS 1 BP L47 EP & PN 2 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TP706 UT WOS:A1996TP70600012 ER PT J AU Agassi, D Bardo, RD AF Agassi, D Bardo, RD TI Dimensional reduction of flux creep in a superconducting-ceramics model SO PHYSICA C LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; MOTION AB A general expression for the escape probability of a vortex from a pinning domain is derived for a Brownian motion model. In the context of a representative two-dimensional pinning potential (triangular trench) and under specified conditions, it is shown that the corresponding escape probability equals that of an ''effective'' one-dimensional pinning potential. This result is termed dimensional reduction. Grain and twin boundary geometries in YBCO ceramics satisfy in general the conditions for the dimensional-reduction approximation. As an application of dimensional reduction, we consider a two-dimensional YBCO ceramic model, which constitutes a random, triangular-trench pinning-potential network. The analytical and numerical analysis of this model vindicate the validity of a one-dimensional description, as often applied to the analysis of current transport in the flux-creep regime. The generality of these results is briefly discussed. RP Agassi, D (reprint author), USN, CTR SURFACE WARFARE, CODE 682, WHITE OAK, SILVER SPRING, MD 20903 USA. NR 23 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD JAN 20 PY 1996 VL 257 IS 1-2 BP 61 EP 73 DI 10.1016/0921-4534(95)00691-5 PG 13 WC Physics, Applied SC Physics GA TV085 UT WOS:A1996TV08500007 ER PT J AU Kendziora, C Kelley, RJ Skelton, E Onellion, M AF Kendziora, C Kelley, RJ Skelton, E Onellion, M TI Advances in single-crystal Bi2Sr2CaCu2O8+delta superconductors SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article ID SR-CU-O; TC; GROWTH; RANGE AB Susceptibility, resistivity and X-ray diffraction measurements have been performed on single crystals of Bi2Sr2CaCu2O8+delta. Very sharp (0.5 K width) superconducting transition temperatures as low as 55 K have been reached in the overdoped part of the phase diagram. Anneals in low oxygen pressures have allowed us to access the entire underdoped region of the phase diagram. The samples have been reversibly changed from a high-temperature superconductor to an insulator. C1 UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA. RP USN, RES LAB, DIV CONDENSED MATTER & RADIAT SCI, WASHINGTON, DC 20375 USA. NR 23 TC 47 Z9 48 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 EI 1873-2143 J9 PHYSICA C JI Physica C PD JAN 20 PY 1996 VL 257 IS 1-2 BP 74 EP 78 DI 10.1016/0921-4534(95)00663-X PG 5 WC Physics, Applied SC Physics GA TV085 UT WOS:A1996TV08500008 ER PT J AU Berry, AK Thompson, PE Rao, MV Fatemi, M Dietrich, HB AF Berry, AK Thompson, PE Rao, MV Fatemi, M Dietrich, HB TI B implants in Si1-xGex/Si SO APPLIED PHYSICS LETTERS LA English DT Article ID ALLOY LAYERS; REGROWTH AB Boron ion implantations were performed into 100 nm thick, undoped, strained Si1-xGex alloy films with x values of 0, 0.1, and 0.2 grown on (100) Si. B implants of 1 x 10(13) 1 x 10(14), and 1 x 10(15) cm(-2) were done at 20 keV. Implant activation was accomplished by using either 20 s rapid thermal anneals or 10 min furnace anneals, both at temperatures up to 800 degrees C. The annealed material was characterized by Hall, secondary ion mass spectrometry, and x-ray rocking curve measurements. We observed an increasing B activation with increasing Ge concentration in the alloy. For x=0.2 we obtained 100% B activation for 1 x 10(13) and 1 x 10(14) cm(-2) implants annealed at 700 and 800 degrees C. (C) 1996 American Institute of Physics. C1 USN,RES LAB,WASHINGTON,DC 20375. RP Berry, AK (reprint author), GEORGE MASON UNIV,DEPT ELECT & COMP ENGN,FAIRFAX,VA 22030, USA. NR 13 TC 5 Z9 5 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JAN 15 PY 1996 VL 68 IS 3 BP 391 EP 393 DI 10.1063/1.116695 PG 3 WC Physics, Applied SC Physics GA TP438 UT WOS:A1996TP43800038 ER PT J AU Siskind, DE Russell, JM AF Siskind, DE Russell, JM TI Coupling between middle and upper atmospheric NO: Constraints from HALOE observations SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID NUMERICAL-MODEL AB Observations of NO, NO2, and CH4 from the HALOE instrument on the UARS satellite are used to investigate the transport of thermospheric NO into the middle atmosphere. By comparing the variation of NO and NO2 with simultaneous measurements of a long lived stratospheric tracer like CH4, regions of enhanced odd nitrogen can be quantified. Our results indicate substantial enhancement of NO in the high latitude winter mesosphere extending from thermospheric altitudes down to about 55-60 km. We also see evidence of substantial equatorward mixing of mesospheric NO. Occasional enhancements of NOx are seen extending down into the upper stratosphere in winter; however, they do not appear to persist. Observations by HALOE at latitudes up to 75-80 degrees in early spring show no evidence for enhanced NOx. This suggests that the effect of thermospheric NO on high latitude upper stratospheric O-3 may be less than previously thought. C1 NASA,LANGLEY RES CTR,DIV ATMOSPHER SCI,HAMPTON,VA 23681. RP Siskind, DE (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 7641,WASHINGTON,DC 20375, USA. NR 11 TC 26 Z9 26 U1 0 U2 4 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD JAN 15 PY 1996 VL 23 IS 2 BP 137 EP 140 DI 10.1029/95GL03782 PG 4 WC Geosciences, Multidisciplinary SC Geology GA TQ467 UT WOS:A1996TQ46700007 ER PT J AU Volpano, DM AF Volpano, DM TI Lower bounds on type checking overloading SO INFORMATION PROCESSING LETTERS LA English DT Article DE type theory; overloading; computational complexity AB Smith has proposed an elegant extension of the ML type system for polymorphic functional languages with overloading. Type inference in his system requires solving a satisfiability problem that is undecidable if no restrictions are imposed on overloading. We explore the effect of recursion and the structure of type assumptions in overloadings on the problem's complexity. RP Volpano, DM (reprint author), USN, POSTGRAD SCH, DEPT COMP SCI, MONTEREY, CA 93943 USA. NR 13 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0020-0190 EI 1872-6119 J9 INFORM PROCESS LETT JI Inf. Process. Lett. PD JAN 15 PY 1996 VL 57 IS 1 BP 9 EP 13 DI 10.1016/0020-0190(95)00184-0 PG 5 WC Computer Science, Information Systems SC Computer Science GA TQ121 UT WOS:A1996TQ12100002 ER PT J AU Hurlburt, HE Wallcraft, AJ Schmitz, WJ Hogan, PJ Metzger, EJ AF Hurlburt, HE Wallcraft, AJ Schmitz, WJ Hogan, PJ Metzger, EJ TI Dynamics of the Kuroshio/Oyashio current system using eddy-resolving models of the North Pacific Ocean SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article ID GENERAL-CIRCULATION MODEL; ZONAL PENETRATION SCALE; LIMITED-AREA MODEL; GULF-STREAM; ALTIMETER DATA; LARGE MEANDER; VARIABILITY; SIMULATION; ATLANTIC; RESOLUTION AB A set of numerical simulations is used to investigate the Pacific Ocean circulation north of 20 degrees S, with emphasis on the Kuroshio/Oyashio current system. The primitive equation models used for these simulations have a free surface and realistic geometry that includes the deep marginal seas such as the Sea of Japan. Most of the simulations have 1/8 degrees resolution for each variable but range from 1/2 degrees, 1.5-layer reduced gravity to 1/16 degrees, six layer with realistic bottom topography. These are used to investigate the dynamics of the Kuroshio/Oyashio current system and to identify the processes that contribute most to the realism of the simulations. This is done by model-data comparisons, by using the modularity of layered ocean models to include/exclude certain dynamical processes, by varying the model geometry and bottom topography, and by varying model parameters such as horizontal grid resolution, layer structure, and eddy viscosity. In comparison with observational data the simulations show that the barotropic mode, at least one internal mode, nonlinearity, high ''horizontal'' resolution (1/8 degrees or finer), the regional bottom topography, and the wind forcing are critical for realistic simulations. The first four are important for baroclinic instability (eddy-mean energetics actually show mixed barotropic-baroclinic instability), the wind curl pattern for the formation and basic placement of the current system, and the bottom topography for the distribution of the instability and for influences on the pathways of the mean how. Both the Hellerman and Rosenstein (1983) (HR) monthly wind stress climatology and 1000-mbar winds from the European Centre for Medium-Range Weather Forecasts (ECMWF) have been used to drive the model. East of about 150 degrees E, they give a mean latitude for the Kuroshio Extension that differs by about 3 degrees, approximately 34 degrees N for HR, 37 degrees N for ECMWF, and 35 degrees N observed. The subarctic front is the northern boundary of the subtropical gyre. It is associated with the annual and April-September mean zero wind stress curl lines (which are similar), while the Kuroshio Extension is associated with wintertime zero wind stress curl. This means that part of the flow from the Kuroshio must pass north of the Kuroshio Extension and connect with the Oyashio and subarctic front. Realistic routes for this connection are flow through the Sea of Japan, a nonlinear route separated fi om the east coast of Japan, and bifurcation of the Kuroshio at the Shatsky Rise. In addition, the six layer simulations show a 3-Sv meridional overturning cell with southward surface flow and northward return flow centered near 400 m depth. Baroclinic instability plays a critical role in coupling the shallow and abyssal layer circulations and in allowing the bottom topography to strongly influence the shallow circulation. By this means the Izu Ridge and Trench and seamounts upstream and downstream of these have profound influence on (1) the mean path of the Kuroshio and its mean meanders south and east of Japan and (2) on separating the northward flow connecting the Kuroshio and the Oyashio/subarctic front from the east coast of Japan. Without the topographic influence the models show an unrealistic northward current along the east coast of Japan. In essence, the topography regulates the location and strength of the baroclinic instability. The baroclinic instability gives eddy-driven deep mean flows that follow the f/h contours (where f is the Coriolis parameter and h is the depth of the water column) of the bottom topography. These abyssal currents then strongly influence the pathway for subtropical gyre flow north of the Kuroshio Extension and steer the mean meanders in the Kuroshio south and east of Japan, This is corroborated by current meter data from the Kuroshio Extension Regional Experiment (World Ocean Circulation Experiment line PCM 7). The meander path south of Japan depends on the occurrence of baroclinic instability west of the Izu Ridge; otherwise, a straight path occurs. The pathway shows little sensitivity to the Tokara Strait transport over the range simulated (36-72 Sv in yearly means). However, interannual increases in wind forcing or Tokara Strait transport give rise to a predominant meander path, while decreases yield a predominant straight path. Resolution of 1/8 degrees in an ocean model is comparable to the 2.5 degrees resolution used in atmospheric forecast models in the early 1980s based on the first internal mode Rossby radius of deformation. Model comparisons at 1/8 degrees and 1/16 degrees resolution and comparisons with current meter data and Geosat altimeter data show that 1/16 degrees resolution is needed for adequate eastward penetration of the high eddy kinetic energy associated with the Kuroshio Extension. C1 SVERDRUP TECHNOL INC, BAY ST LOUIS, MS 39529 USA. WOODS HOLE OCEANOG INST, WOODS HOLE, MA 02543 USA. PLANNING SYST INC, SLIDELL, LA 70458 USA. RP USN, RES LAB, CODE 7323, BAY ST LOUIS, MS 39529 USA. NR 52 TC 147 Z9 149 U1 4 U2 32 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9275 EI 2169-9291 J9 J GEOPHYS RES-OCEANS JI J. Geophys. Res.-Oceans PD JAN 15 PY 1996 VL 101 IS C1 BP 941 EP 976 DI 10.1029/95JC01674 PG 36 WC Oceanography SC Oceanography GA TQ792 UT WOS:A1996TQ79200006 ER PT J AU Jacobs, GA Teague, WJ Mitchell, JL Hurlburt, HE AF Jacobs, GA Teague, WJ Mitchell, JL Hurlburt, HE TI An examination of the North Pacific Ocean in the spectral domain using Geosat altimeter data and a numerical ocean model SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article ID TIDES; VARIABILITY AB The sea surface height (SSH) variations of the North Pacific ocean and the Kuroshio Extension region, in particular, are examined by frequency and wavenumber decompositions of a 1/8 degrees, six-layer primitive equation Pacific Ocean model and of the Geosat Exact Repeat Mission (ERM) data. Both data sets exhibit peaks in variability at 1 and 2 cycles per year over much of the Kuroshio Extension region. This study is restricted to these two frequencies. Annual variations of equatorial currents in both data sets are similar in both space and time, with the variations in the South Equatorial Current appearing as annual westward propagations. Annual variations in the strength of the Kuroshio Extension are manifested mainly through changes in the strength of the recirculation gyres on the southern side of the current. Annual transport maxima for the Kuroshio Extension occur around late October for both the model and Geosat. Large-scale variations (length scales greater than 1000 km) of the model and Geosat have comparable amplitudes. The main differences between the model SSH and the Geosat ERM data occur over regions where seasonal steric variations are significant (from 20 degrees N to 30 degrees N). Wavenumber spectra over the Kuroshio Extension region reveal similar dynamics in both data sets. Much of the energy in wavenumber spectra appears as westward propagating SSH anomalies near the theoretical Rossby wave dispersion relations. As the Rossby wave dispersion relation changes with latitude (shifting to shorter wavelengths with higher latitudes), the peaks in the wavenumber decompositions follow. Thus the dynamics are generally consistent with quasigeostrophic dynamics in both the model and altimeter data. Wavelengths of propagating SSH anomalies which have spectral peaks near the Rossby dispersion curve are longer in the Geosat and model than wavelengths indicated by theory. In the semiannual frequency below 35 degrees N, westward propagation dominates over eastward propagation in both Geosat and the model. Most differences in the dynamics' of the model and Geosat occur at shorter length and timescales, with Geosat showing higher amplitudes at the shorter scales than the model. C1 UNIV COLORADO,COLORADO CTR ASTRODYNAM RES,BOULDER,CO 80309. RP Jacobs, GA (reprint author), USN,RES LAB,CODE 7323,BAY ST LOUIS,MS 39529, USA. RI Jacobs, Gregg/C-1456-2008 NR 30 TC 13 Z9 13 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-OCEANS JI J. Geophys. Res.-Oceans PD JAN 15 PY 1996 VL 101 IS C1 BP 1025 EP 1044 DI 10.1029/95JC02081 PG 20 WC Oceanography SC Oceanography GA TQ792 UT WOS:A1996TQ79200010 ER PT J AU Mitchell, JL Teague, WJ Jacobs, GA Hurlburt, HE AF Mitchell, JL Teague, WJ Jacobs, GA Hurlburt, HE TI Kuroshio Extension dynamics from satellite altimetry and a model simulation SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article ID SURFACE HEIGHT VARIABILITY; GEOSAT ALTIMETRY; OCEAN MODEL; 152-DEGREES-E; PROFILES; ATLANTIC; MISSION; STRESS; ENERGY; TIDES AB Altimeter data from the Geosat Exact Repeat Mission (ERM) are analyzed with the aid of a simulation from an eddy-resolving primitive equation model of the North Pacific basin in the region of the Kuroshio and Kuroshio Extension. The model domain covers the Pacific Ocean north of 20 degrees S and has a resolution of 0.125 degrees latitude and 0.176 degrees longitude. The model is synoptically driven by daily 1000-mbar winds from the European Centre for Medium-Range Weather Forecasts (ECMWE) which encompass the Geosat time period. Model output is sampled along Geosat ground tracks for the period of the ERM. Additionally, the model and the Geosat data are compared with climatological hydrography and satellite IR frontal position analyses. Analyses compared include maps of sea surface height (SSH) mean and variability, eddy kinetic energy (EKE), seasonal transport anomaly, and time-longitude plots of SSH anomaly. The model simulation provides annual mean SSH fields for 1987 and 1988 which reproduce the four quasi-permanent meanders seen in hydrographic climatology (cyclonic at 138 degrees E and anticyclonic at 144 degrees E, 150 degrees E, and 160 degrees E). These are linked to the bottom topography. In the model simulation, Geosat altimeter data, and climatology, we observe four peaks in SSH variability associated with meander activity and two peaks in EKE, with the strongest about 3200 cm(2) s(-2) along the mean Kuroshio path in the Geosat data. The local maxima in SSH variability tend to occur where relatively strong, topographically steered meridional abyssal currents intersect the zonally oriented Kuroshio Extension. Westward propagation of SSH anomalies at phase speeds of 2 to 3 cm s(-1) in the region east of 155 degrees E is observed in the model simulation and Geosat observations. A late summer maximum in the upper ocean transport anomaly of the Kuroshio Extension is inferred from changes in the cross-stream differential in SSH from the simulation and Geosat observations. C1 UNIV COLORADO,COLORADO CTR ASTRODYNAM RES,BOULDER,CO 80309. RP Mitchell, JL (reprint author), USN,RES LAB,CODE 7320,BAY ST LOUIS,MS 39529, USA. RI Jacobs, Gregg/C-1456-2008 NR 46 TC 22 Z9 22 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-OCEANS JI J. Geophys. Res.-Oceans PD JAN 15 PY 1996 VL 101 IS C1 BP 1045 EP 1058 DI 10.1029/95JC02864 PG 14 WC Oceanography SC Oceanography GA TQ792 UT WOS:A1996TQ79200011 ER PT J AU Nordstrom, L Singh, DJ AF Nordstrom, L Singh, DJ TI Electronic structure of Ce-filled skutterudites SO PHYSICAL REVIEW B LA English DT Article ID LAFE4P12 AB The electronic structure of CeFe4P12 and CeFe4Sb12 have been studied with density-functional calculations. Both are small band-gap semiconductors within the local-density approximation. The Ce is near trivalent in both compounds, and the Ce 4f states hybridize strongly with both Fe 3d and pnictogen p states in the vicinity of the Fermi energy. The band gaps are the result of this hybridization. C1 USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375. RP Nordstrom, L (reprint author), GEORGE MASON UNIV,INST COMPUTAT SCI & INFORMAT,FAIRFAX,VA 22030, USA. RI Singh, David/I-2416-2012 NR 18 TC 134 Z9 134 U1 2 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 15 PY 1996 VL 53 IS 3 BP 1103 EP 1108 DI 10.1103/PhysRevB.53.1103 PG 6 WC Physics, Condensed Matter SC Physics GA TU290 UT WOS:A1996TU29000039 ER PT J AU Pickett, WE Singh, DJ AF Pickett, WE Singh, DJ TI Electronic structure and half-metallic transport in the La1-xCaxMnO3 system SO PHYSICAL REVIEW B LA English DT Article ID GIANT MAGNETORESISTANCE; BAND THEORY; LA1-XSRXMNO3; DIFFRACTION; PEROVSKITE; TRANSITION; LANTHANUM; CATIO3 AB Possible origins of ''colossal magnetoresistance'' (CMR) behavior in the La1-xCaxMnO3 system are studied using the local spin-density method. These calculations allow the quantification of the effects of Mn d-O p hybridization that have been largely neglected in previously published work. As regards the end-point compounds CaMnO3 and LaMnO3, the very different structural and magnetic symmetries of their ground states are predicted correctly. The distortion from the cubic perovskite structure of the LaMnO3 lattice is necessary to produce an antiferromagnetic insulating ground state. The distortion also strengthens the Mn magnetic moments. Application to ferromagnetic and constrained ferrimagnetic phases of La1-xCaxMnO3 in the CMR regime x approximate to 1/4-1/3 suggests, as observed, that magnetic coupling switches from antiferromagnetic to ferromagnetic. Hybridization between Mn d states and O p states is found to be strongly spin dependent, because the majority Mn d bands overlap the O p bands while the minority Mn d bands are separated by a gap from the O p bands. Both ferromagnetic and ferrimagnetic orderings are obtained and compared. We identify strong local environment effects arising from neighboring cation charge differences (La3+ or Ca2+) that suggest localization of the low density of minority carriers, leading to effective half-metallic ferromagnetism in the CMR regime. This behavior supports in some respects the popular ''double exchange'' picture of Zener but indicates the Mn d-O p hybridization is much too strong to be considered perturbatively. Half-metallic character promotes the possibility of very large magnetoresistance, and may well be an essential ingredient in the CMR effect. RP Pickett, WE (reprint author), USN, RES LAB, COMPLEX SYST THEORY BRANCH, WASHINGTON, DC 20375 USA. RI Singh, David/I-2416-2012 NR 67 TC 626 Z9 640 U1 9 U2 86 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 JAN 15 PY 1996 VL 53 IS 3 BP 1146 EP 1160 DI 10.1103/PhysRevB.53.1146 PG 15 WC Physics, Condensed Matter SC Physics GA TU290 UT WOS:A1996TU29000044 ER PT J AU Sprague, JA Gilmore, CM AF Sprague, JA Gilmore, CM TI Molecular dynamics simulations of film-substrate interface mixing in the energetic deposition of fcc metals SO THIN SOLID FILMS LA English DT Article DE coatings; deposition process; ion bombardment; metals ID EMBEDDED-ATOM-METHOD; BEAM-ASSISTED DEPOSITION; ULTRAHIGH-VACUUM; SELF-DIFFUSION; THIN-FILMS; SURFACE; AG; GROWTH; AU; PD AB Embedded-atom-method molecular dynamic simulations have been performed to examine the interface mixing produced by deposition of fee metals on fee metal substrates. Atom arrival energies of 0.1, 10, 20, and 10 eV have been studied. The interface mixing initiated by atom impacts on the substrate surface was found to increase significantly with increasingly negative heats of solution of film atoms in the substrate lattice. As expected. both the total amount of interface mixing and the depth over which it occurred increased with increasing atom deposition energy. Comparison of the interface mixing results for two different temperature-control algorithms led to the conclusion that the interface mixing was very sensitive to short-lived localized substrate lattice excitations in the vicinity of atom impacts. This concept of interface mixing has some similarities to the concept of a thermal spike in bulk ion mixing, but does not involve any localized melting of the lattice. For a simulation of 0.1 eV Ni deposition on a Au substrate, a thermally-activated interface mixing process with a low activation energy was observed, driven by the difference between the surface energies of Ni and Au. C1 GEORGE WASHINGTON UNIV,WASHINGTON,DC 20016. RP Sprague, JA (reprint author), USN,RES LAB,4555 OVERLOOK AVE NW,WASHINGTON,DC 20375, USA. NR 36 TC 32 Z9 33 U1 2 U2 7 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0040-6090 J9 THIN SOLID FILMS JI Thin Solid Films PD JAN 15 PY 1996 VL 272 IS 2 BP 244 EP 254 DI 10.1016/0040-6090(95)06951-8 PG 11 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA UF491 UT WOS:A1996UF49100009 ER PT J AU Frauenheim, T Kohler, T Sternberg, M Porezag, D Pederson, MR AF Frauenheim, T Kohler, T Sternberg, M Porezag, D Pederson, MR TI Vibrational and electronic signatures of diamond surfaces SO THIN SOLID FILMS LA English DT Article DE diamond; scanning tunnelling microscopy; surface phonons and adsorbate vibrations ID CHEMICAL VAPOR-DEPOSITION; RECONSTRUCTION; GROWTH; FILMS AB Stable clean and hydrogenated diamond (100) and (111) surface reconstructions found by density-functional molecular-dynamics (DF-MD) are characterized in their vibrational and electronic properties. For sufficiently large surface slab supercells we plot spatially resolved charge densities of the highest occupied surface states at constant height, which are compared with recently obtained images from scanning tunnelling microscopy. In addition, we have calculated the surface top-three-layer projected vibrational spectra and reproduce the main features obtained from experiments. The various reconstructions of the diamond surface yield rich spectra of surface modes involving excitations of dimers, trimers and chains. We classify most characteristic surface modes and discuss correlations to peaks observed in surface-sensitive experiments. Both calculated charge density distributions and vibrational spectra represent signatures of the considered surfaces that might be used to understand and to classify as grown diamond surfaces. C1 USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375. RP Frauenheim, T (reprint author), TECH UNIV,INST PHYS,D-09107 CHEMNITZ,GERMANY. RI Frauenheim, Thomas/C-5653-2015 OI Frauenheim, Thomas/0000-0002-3073-0616 NR 41 TC 30 Z9 30 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0040-6090 J9 THIN SOLID FILMS JI Thin Solid Films PD JAN 15 PY 1996 VL 272 IS 2 BP 314 EP 330 DI 10.1016/0040-6090(95)06956-9 PG 17 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA UF491 UT WOS:A1996UF49100014 ER PT J AU Garland, NL Nelson, HH AF Garland, NL Nelson, HH TI Temperature dependent kinetics of the reaction OH+CF3CH2CF3 SO CHEMICAL PHYSICS LETTERS LA English DT Article ID PHOTOLYSIS AB We have re-examined the kinetics of the reaction of OH with CF3CH2CF3 (FC 236fa) between 281 and 337 K using highly purified reactant. After accounting for the contribution to the measured rate of all measured impurities, we derive a room temperature rate constant kappa = (4.15 +/- 0.33) X 10(-16) cm(3) s(-1), a factor of two smaller than our earlier report [J. Geophys. Res. 98 (1993) 23, 107] and in general agreement with other recent measurements. RP Garland, NL (reprint author), USN,RES LAB,DIV CHEM,CODE 6110,WASHINGTON,DC 20375, USA. NR 12 TC 6 Z9 8 U1 0 U2 0 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 12 PY 1996 VL 248 IS 3-4 BP 296 EP 300 DI 10.1016/0009-2614(95)01288-5 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TQ355 UT WOS:A1996TQ35500027 ER PT J AU Tepper, G Losee, J AF Tepper, G Losee, J TI A compressed xenon ionization chamber X-ray gamma-ray detector incorporating both charge and scintillation collection SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Letter ID LIQUID XENON AB A high resolution room temperature dual gridded ionization chamber X-ray/gamma-ray detector incorporating both charge and scintillation light collecting capabilities is described. The detector uses highly purified and compressed xenon gas as the detection medium and has an intrinsic energy resolution of 2.4% at 662 keV. The scintillation signal is ideal for triggering, background discrimination, and ionization position determination. The detector design and timing properties are described. RP Tepper, G (reprint author), USN,CONTROL & OCEAN SURVEILLANCE CTR,RES DEV TEST & EVALUAT DIV,SAN DIEGO,CA 92152, USA. NR 6 TC 9 Z9 9 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 11 PY 1996 VL 368 IS 3 BP 862 EP 864 DI 10.1016/0168-9002(95)00823-3 PG 3 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA TR030 UT WOS:A1996TR03000037 ER PT J AU Sica, L AF Sica, L TI Sheared-beam imaging: An evaluation of its optical compensation of thick atmospheric turbulence SO APPLIED OPTICS LA English DT Article DE unconventional imaging; pupil-plane imaging; sheared-beam imaging; shearing interferometry; compensation of atmospheric turbulence; sheared coherent interferometric photography ID PROPAGATION; IMAGES; MEDIA AB Sheared-beam imaging (SBI) should compensate the effects of an idealized layer of turbulence located either in a transmitter/detector plane or in an object plane. This motivated the study of optical compensation of SBI in the presence of uniformly distributed turbulence over long horizontal paths in the cases of ideally smooth and ideally rough extended objects. The phase error along a one-dimensional wave front resulting from SBI observation is computed numerically in the long-path regime and is compared with that of an equivalent conventional system for the case of a large smooth object. It is found that for the conditions considered the phase errors of the SBI system are greater than those of a conventional system. In the case of an ideally rough object the extra information furnished by the SBI observations does not lead to data that can be inverted to compute an image by the conventional shearing-interferometric algorithm. The phase errors in imaging a point reflector, however, are perfectly compensated. RP USN, RES LAB, CODE 5630, 4555 OVERLOOK AVE SW, WASHINGTON, DC 20375 USA. NR 20 TC 1 Z9 1 U1 2 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 1996 VL 35 IS 2 BP 264 EP 272 DI 10.1364/AO.35.000264 PG 9 WC Optics SC Optics GA TR782 UT WOS:A1996TR78200006 PM 21069008 ER PT J AU Wang, YM AF Wang, YM TI Nonradial coronal streamers SO ASTROPHYSICAL JOURNAL LA English DT Article DE interplanetary medium; solar wind; Sun, activity; Sun, corona; Sun, magnetic fields AB The appearance of white light streamers in the outer solar corona is simulated by applying simple extrapolation models to the photospheric magnetic field and taking line-of-sight electron scattering into account. Highly nonradial streamers are obtained when the electrical currents are confined to thin sheets and the photospheric held contains a strong quadrupole (or higher order multipole) component, in addition to the normally dominant dipole. The finite angular resolution of the simulations gives rise to faint, multiple raylike structures or striations, which may mimic the effect of density inhomogeneities in the heliospheric current sheet. RP Wang, YM (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 7672W,WASHINGTON,DC 20375, USA. NR 20 TC 21 Z9 22 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 10 PY 1996 VL 456 IS 2 BP L119 EP & PN 2 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TN544 UT WOS:A1996TN54400012 ER PT J AU Rottman, JW Broutman, D Grimshaw, R AF Rottman, JW Broutman, D Grimshaw, R TI Numerical simulations of uniformly stratified fluid flow over topography SO JOURNAL OF FLUID MECHANICS LA English DT Article ID WAVES; OBSTACLE AB We use a high-resolution spectral numerical scheme to solve the two-dimensional equations of motion for the flow of a uniformly stratified Boussinesq fluid over isolated bottom topography in a channel of finite depth. The focus is on topography of small to moderate amplitude and slope and for conditions such that the flow is near linear resonance of either of the first two internal wave modes. The results are compared with existing inviscid theories: the steady hydrostatic analysis of Long (1955), time-dependent linear long-wave theory, and the fully nonlinear, weakly dispersive resonant theory of Grimshaw & Yi (1991). For the latter, we use a spectral numerical technique, with improved accuracy over previously used methods, to solve the approximate evolution equation for the amplitude of the resonant mode. Also, we present some new results on the modal similarity of the solutions of Long and of Grimshaw & Yi. For flow conditions close to linear resonance, solutions of Grimshaw & Yi's evolution equation compare very well with our fully nonlinear numerical solutions, except for very steep topography. For flow conditions between the first two resonances, Long's steady solution is approached asymptotically in time when the slope of the topography is sufficiently small. For steeper topography, the flow remains unsteady. This unsteadiness is manifested very clearly as periodic oscillations in the drag, which have been observed in previous numerical simulations and tow-tank experiments. We explain these oscillations as mainly due to the internal waves that according to linear theory persist longest in the neighbourhood of the topography. C1 USN,RES LAB,EO HULBURT CTR SPACE SCI,WASHINGTON,DC 20375. UNIV NEW S WALES,DEPT APPL MATH,SYDNEY,NSW 2052,AUSTRALIA. MONASH UNIV,DEPT MATH,CLAYTON,VIC 3168,AUSTRALIA. RP Rottman, JW (reprint author), PRAXIS INC,6080 FRANCONIA RD,ALEXANDRIA,VA 22310, USA. RI Grimshaw, Roger/J-7855-2013 OI Grimshaw, Roger/0000-0003-0917-3218 NR 14 TC 25 Z9 26 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0022-1120 J9 J FLUID MECH JI J. Fluid Mech. PD JAN 10 PY 1996 VL 306 BP 1 EP 30 DI 10.1017/S0022112096001206 PG 30 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA TU163 UT WOS:A1996TU16300001 ER PT J AU Marshall, JS Grant, JR AF Marshall, JS Grant, JR TI Penetration of a blade into a vortex core: Vorticity response and unsteady blade forces SO JOURNAL OF FLUID MECHANICS LA English DT Article ID ATMOSPHERIC-TURBULENCE INGESTION; ROTOR NOISE; VELOCITY; FLOWS; AREA AB Numerical calculations are performed for the problem of penetration into a vortex core of a blade travelling normal to the vortex axis, where the plane formed by the blade span and the direction of blade motion coincides with the normal plane of the vortex axis at the point of penetration. The calculations are based on a computational method, applicable for unsteady three-dimensional flow past immersed bodies, in which a collocation solution of the vorticity transport equation is obtained on a set of Lagrangian control points. Differences between this method and other Lagrangian vorticity-based methods in the literature are discussed. Lagrangian methods of this type are particularly attractive for problems of unsteady vortex-body interaction, since control points need only be placed on the surface of the body and in regions of the flow with non-negligible vorticity magnitude. The computations for normal blade-vortex interaction (BVI) are performed for an inviscid fluid and focus on the relationship between the vortex core deformation due to penetration of the blade into the vortex ambient position and the resulting unsteady pressure field and unsteady force acting on the blade. Computations for cases with different vortex circulations are performed, and the accuracy of an approximate formulation using rapid distortion theory is assessed by comparison with the full computational results for unsteady blade force. The force generated from blade penetration into the vortex ambient position is found to be of a comparable magnitude to various other types of unsteady BVI forces, such as that due to cutting of the vortex axial flow. C1 UNIV IOWA,IOWA INST HYDRAUL RES,IOWA CITY,IA 52242. USN,UNDERSEA WARFARE CTR,NEWPORT,RI 02841. RP Marshall, JS (reprint author), UNIV IOWA,DEPT MECH ENGN,IOWA CITY,IA 52242, USA. NR 37 TC 30 Z9 30 U1 0 U2 7 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0022-1120 J9 J FLUID MECH JI J. Fluid Mech. PD JAN 10 PY 1996 VL 306 BP 83 EP 109 DI 10.1017/S0022112096001243 PG 27 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA TU163 UT WOS:A1996TU16300005 ER PT J AU Lee, J Sharma, R Wang, SM Milne, GWA Lewin, NE Szallasi, Z Blumberg, PM George, C Marquez, VE AF Lee, J Sharma, R Wang, SM Milne, GWA Lewin, NE Szallasi, Z Blumberg, PM George, C Marquez, VE TI Conformationally constrained analogues of diacylglycerol .12. Ultrapotent protein kinase C ligands based on a chiral 4,4-disubstituted heptono-1,4-lactone template SO JOURNAL OF MEDICINAL CHEMISTRY LA English DT Article ID GAMMA-LACTONES AB Conformationally constrained analogues of diacylglycerol (DAG) built on a 5-[(acyloxy)methyl] 5-(hydroxymethyl)tetrahydro-2-furanon template (1, Chart 1) were shown previously to bind tightly to protein kinase Ca (PK-C alpha) in a stereospecific manner. These compounds, however, racemized readily through rapid acyl migration and lost biological potency. In order to circumvent this problem, the ''reversed ester'' analogues were designed as a new set of PK-C ligands. This reversal of the ester function produced some new DAG mimetics that are embedded in a C4 doubly-branched heptono-1,4-lactone template. The reversed ester analogues were impervious to racemization, and their chemically distinct branches facilitated the enantiospecific syntheses of all targets. Compound 2, the simplest; reversed ester analogue of 1 (Chart 1), exhibited a 3.5-fold reduction in binding sanity toward PK-C alpha which we attributed to the loss of a stabilizing gauche interaction that caused the ester branch in 2 to be more disordered than in the normal ester 1. However, conversion of the propanoyl branch of 2 into a propenoyl branch restored binding affinity (3 versus 5). As expected, the compounds bound to the enzyme with strict enantioselectivity (3 and 5 versus 4 and 6). Functionalization of the propenoyl-branched compounds as alpha-alkylidene lactones, in a manner which proved successful with the 5-[(acyloxy)methyl]-5-(hydroxymethyl)tetrahydro-2-furanone template (9 and 10), produced stable compounds with equivalent ultrapotent binding affinities for PK-C alpha (7 and 8). The additional incorporation of the propenoyl-branched carbonyl into a gamma-lactone ring was performed (11-14) not only to derive a possible additional entropic advantage but also to confirm the spatial disposition of this carbonyl function in the ligand-enzyme complex. Although no additional entropic advantage was derived, the high binding affinities displayed by compounds 11 and 12 helped to establish the correct orientation of the equivalent carbonyl group in PKC-bound DAG, As expected, these DAG analogues activated PK-C alpha. The most potent agonist, compound 8, stimulated phosphorylation of the a-pseudosubstrate peptide, and in primary mouse keratinocytes it caused inhibition of binding of epidermal growth factor with an ED(50) of approximately 1 mu M. In contrast to the phorbol esters, compound 8 did not induce acute edema or hyperplasia in skin of CD-1 mice, and its pattern of downregulation with several PK-C isozymes was different from that of phorbol 12-myristate 13-acetate (PMA). C1 NCI, MED CHEM LAB, DEV THERAPEUT PROGRAM, DIV CANC TREATMENT, BETHESDA, MD 20892 USA. NCI, CELLULAR CARCINOGENESIS & TUMOR PROMOT LAB, MOLEC MECH TUMOR PROMOT SECT, BETHESDA, MD 20892 USA. USN, RES LAB, STRUCT MATTER LAB, WASHINGTON, DC 20375 USA. RI Wang, Shaomeng/E-9686-2010 NR 14 TC 31 Z9 31 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0022-2623 J9 J MED CHEM JI J. Med. Chem. PD JAN 5 PY 1996 VL 39 IS 1 BP 36 EP 45 DI 10.1021/jm950278f PG 10 WC Chemistry, Medicinal SC Pharmacology & Pharmacy GA TN771 UT WOS:A1996TN77100006 PM 8568825 ER PT J AU Meyer, JR Vurgaftman, I Yang, RQ RamMohan, LR AF Meyer, JR Vurgaftman, I Yang, RQ RamMohan, LR TI Type-II and type-I interband cascade lasers SO ELECTRONICS LETTERS LA English DT Article DE semiconductor junction lasers; semiconductor quantum wells AB The authors propose two novel sources emitting in the mid-IR: type-II and type-I interband cascade lasers, and perform detailed gain calculations. High radiative efficiencies are expected, since the phonon processes which dominate relaxation in the intersubband quantum cascade laser are effectively eliminated. C1 UNIV HOUSTON,CTR SPACE VACUUM EPITAXY,HOUSTON,TX 77204. WORCESTER POLYTECH INST,WORCESTER,MA 01609. RP Meyer, JR (reprint author), USN,RES LAB,CODE 5613,WASHINGTON,DC 20375, USA. RI Ram-Mohan, Ramdas/C-5167-2012 NR 6 TC 117 Z9 118 U1 0 U2 17 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD JAN 4 PY 1996 VL 32 IS 1 BP 45 EP 46 DI 10.1049/el:19960064 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA TQ711 UT WOS:A1996TQ71100032 ER PT B AU Hinds, KF AF Hinds, KF GP UNIV WISCONSIN, DISTANCE TEACHING & LEARNING CONF UNIV WISCONSIN, DISTANCE TEACHING & LEARNING CONF TI Fostering interaction and collaborative learning in a high technology environment SO 12TH ANNUAL CONFERENCE ON DISTANCE TEACHING & LEARNING - DESIGNING FOR ACTIVE LEARNING LA English DT Proceedings Paper CT 12th Annual Conference on Distance Teaching & Learning - Designing for Active Learning CY AUG 07-09, 1996 CL MADISON, WI C1 USN, Financial Management Career Ctr, Pensacola, FL 32508 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIVERSITY WISCONSIN DISTANCE TEACHING & LEARNING CONFERENCE PI MADISON PA 1050 UNIV AVE, B-136 LATHROP H ALL, MADISON, WI 53706 USA PY 1996 BP 143 EP 146 PG 4 WC Education & Educational Research; Information Science & Library Science SC Education & Educational Research; Information Science & Library Science GA BL91G UT WOS:000077112900025 ER PT J AU Dropco, KM AF Dropco, KM GP AMER METEOROL SOC TI The Navy's Meteorology and Oceanography (METOC) Integrated Data Display System (MIDDS) SO 12TH INTERNATIONAL CONFERENCE ON INTERACTIVE INFORMATION AND PROCESSING SYSTEMS (IIPS) FOR METEOROLOGY, OCEANOGRAPHY, AND HYDROLOGY: JOINT SESSION WITH FIFTH SYMPOSIUM ON EDUCATION LA English DT Proceedings Paper CT 12th International Conference on Interactive Information and Processing Systems for Meteorology, Oceanography, and Hydrology/5th Symposium on Education CY JAN 28-FEB 02, 1996 CL ATLANTA, GA SP Amer Meteorol Soc C1 USN,OCEANOG OFF,BAY ST LOUIS,MS 39522. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1996 BP 237 EP 240 PG 4 WC Computer Science, Interdisciplinary Applications; Meteorology & Atmospheric Sciences; Remote Sensing SC Computer Science; Meteorology & Atmospheric Sciences; Remote Sensing GA BF41N UT WOS:A1996BF41N00056 ER PT B AU Nuss, WA Mantey, PE Pang, A Long, DDE AF Nuss, WA Mantey, PE Pang, A Long, DDE GP AMER METEOROL SOC TI The real-time environmental information network and analysis system (REINAS) SO 12TH INTERNATIONAL CONFERENCE ON INTERACTIVE INFORMATION AND PROCESSING SYSTEMS (IIPS) FOR METEOROLOGY, OCEANOGRAPHY, AND HYDROLOGY: JOINT SESSION WITH FIFTH SYMPOSIUM ON EDUCATION LA English DT Proceedings Paper CT 12th International Conference on Interactive Information and Processing Systems for Meteorology, Oceanography, and Hydrology/5th Symposium on Education CY JAN 28-FEB 02, 1996 CL ATLANTA, GA SP Amer Meteorol Soc C1 USN,POSTGRAD SCH,MONTEREY,CA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1996 BP 337 EP 339 PG 3 WC Computer Science, Interdisciplinary Applications; Meteorology & Atmospheric Sciences; Remote Sensing SC Computer Science; Meteorology & Atmospheric Sciences; Remote Sensing GA BF41N UT WOS:A1996BF41N00078 ER PT B AU Silbert, M AF Silbert, M GP AIAA/IEEE TI Using information management to integrate smart vehicle subsystems SO 15TH DASC - AIAA/IEEE DIGITAL AVIONICS SYSTEMS CONFERENCE LA English DT Proceedings Paper CT 15th AIAA/IEEE Digital Avionics Systems Conference (15th DASC) CY OCT 27-31, 1996 CL ATLANTA, GA SP AIAA, IEEE RP Silbert, M (reprint author), USN,AIR WARFARE CTR,DIV AIRCRAFT,CODE 45515,WARMINSTER,PA 18974, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3386-1 PY 1996 BP 301 EP 305 DI 10.1109/DASC.1996.559172 PG 5 WC Engineering, Aerospace SC Engineering GA BG78Z UT WOS:A1996BG78Z00043 ER PT B AU Kempf, DR AF Kempf, DR GP AIAA/IEEE TI Electromagnetic vulnerability testing of aircraft using mode-stirred techniques SO 15TH DASC - AIAA/IEEE DIGITAL AVIONICS SYSTEMS CONFERENCE LA English DT Proceedings Paper CT 15th AIAA/IEEE Digital Avionics Systems Conference (15th DASC) CY OCT 27-31, 1996 CL ATLANTA, GA SP AIAA, IEEE AB Electromagnetic vulnerability (EMV) testing is typically performed on aircraft using a standard method where the aircraft is directly radiated by an antenna, with no mode-stirring. Since a standing wave pattern will cause peaks and nulls in the field inside the aircraft, many antenna aspect angles should be used to assure that all equipment on board the aircraft is exposed to the appropriate field. However, this is very time consuming and often not feasible. As a result, some equipment on the aircraft may not be exposed to the intended field level. Using mode-stirred techniques during EMV testing will provide improvement in field distribution throughout the aircraft so that the need to use several aspect angles would be eliminated, and a more controled and thorough test would result. This study was performed to demonstrate this, by comparing cable coupling and held level measurements on a P-3 and an E-2C during EMV testing using both the standard method and mode-stirring. RP Kempf, DR (reprint author), USN,AIR WARFARE CTR,DIV AIRCRAFT,PATUXENT RIVER,MD 20670, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3386-1 PY 1996 BP 351 EP 355 DI 10.1109/DASC.1996.559181 PG 5 WC Engineering, Aerospace SC Engineering GA BG78Z UT WOS:A1996BG78Z00051 ER PT B AU Perkins, K Marrian, C Peckerar, M AF Perkins, K Marrian, C Peckerar, M BE Shelden, GV Reynolds, JA TI Improved pattern placement in membrane mask making SO 16TH ANNUAL SYMPOSIUM ON PHOTOMASK TECHNOLOGY AND MANAGEMENT SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 16th Annual Symposium on Photomask Technology and Management CY SEP 18-20, 1996 CL REDWOOD CITY, CA SP BACUS DE membrane masks; e-beam lithography; pattern placement; proximity X-ray masks AB Pattern placement errors are a problem in the manufacture of masks for proximity X-ray Lithography. Many of these errors are attributable to long term drifts in beam position relative to external fiducials. To address this we have developed a technique based on through-the-membrane monitoring of the electron beam position. This uses a solid state detector with high bandwidth and gain mounted near the back surface of the target membrane. An accurately patterned overlayer on the detector provides the fiducial reference. The overlayer is designed to modulate the electron-hole pair current generated in the diode by absorbing the incident beam. Position information is obtained by analyzing the image created from recording the diode current during patterning. The phase in a Fourier transform of the data at the spatial frequency of the patterned absorber gives a measure of the position of the incident beam. Changes in the observed phase from one frame to the next can then be used to correct position errors of the beam in real time. We report results from tests of various components of this system. Early indications are that the system will be sufficiently fast and accurate for proximity X-ray mask pattern placement correction. RP Perkins, K (reprint author), USN,RES LAB,DIV ELECT SCI & TECHNOL,CODE 6800,4555 OVERLOOK AVE SW,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2282-7 J9 P SOC PHOTO-OPT INS PY 1996 VL 2884 BP 344 EP 352 PG 9 WC Optics SC Optics GA BG97P UT WOS:A1996BG97P00030 ER PT B AU King, SE Dietrich, HB Henry, RL Katzer, DS Moore, WJ Phillips, GW Mania, RC AF King, SE Dietrich, HB Henry, RL Katzer, DS Moore, WJ Phillips, GW Mania, RC BE Moonier, PA TI Development and characterization of zone melt growth GaAs for gamma-ray detectors SO 1995 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE RECORD, VOLS 1-3 LA English DT Proceedings Paper CT 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference CY OCT 21-28, 1995 CL SAN FRANCISCO, CA SP IEEE C1 USN,RES LAB,WASHINGTON,DC 20375. RI Katzer, D. Scott/N-7841-2013 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3181-8 PY 1996 BP 97 EP 101 PG 5 WC Engineering, Electrical & Electronic; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Engineering; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA BF95Z UT WOS:A1996BF95Z00022 ER PT S AU Butler, JT Nowlin, JL Sasao, T AF Butler, JT Nowlin, JL Sasao, T GP IEEE COMP SOC TI Planarity in ROMDD's of multiple-valued symmetric functions SO 1996 26TH INTERNATIONAL SYMPOSIUM ON MULTIPLE-VALUED LOGIC, PROCEEDINGS SE INTERNATIONAL SYMP ON MULTIPLE-VALUED LOGIC - PROCEEDINGS LA English DT Proceedings Paper CT 26th International Symposium on Multiple-Valued Logic CY MAY 29-31, 1996 CL SANTIAGO COMPOSTE, SPAIN SP IEEE, Comp Soc, Tech Comm Multiple Value Log, Univ Santiago Compostela, IEEE, Comp Soc DE multiple-valued function; decision diagrams; ROBDD's; ROMDD's; symmetric functions; voting functions C1 USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943. RI Sasao, Tsutomu/E-9702-2012 NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 0195-623X BN 0-8186-7392-3 J9 INT SYM MVL PY 1996 BP 236 EP 241 DI 10.1109/ISMVL.1996.508364 PG 6 WC Computer Science, Theory & Methods; Mathematics, Applied SC Computer Science; Mathematics GA BF78S UT WOS:A1996BF78S00039 ER PT B AU Hobart, KD Kub, FJ Thompson, PE Potyraj, PA Petrosky, KJ AF Hobart, KD Kub, FJ Thompson, PE Potyraj, PA Petrosky, KJ GP IEEE TI Very high power S-band SiGe heterojunction bipolar transistors SO 1996 54TH ANNUAL DEVICE RESEARCH CONFERENCE DIGEST LA English DT Proceedings Paper CT 54th Annual Device Research Conference CY JUN 24-26, 1996 CL SANTA BARBARA, CA SP IEEE, Electron Devices Soc C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3358-6 PY 1996 BP 42 EP 43 DI 10.1109/DRC.1996.546308 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA BG23Q UT WOS:A1996BG23Q00017 ER PT B AU Kersten, PR AF Kersten, PR BE Smith, MH Lee, MA Keller, J Yen, J TI Including auxiliary information in fuzzy clustering SO 1996 BIENNIAL CONFERENCE OF THE NORTH AMERICAN FUZZY INFORMATION PROCESSING SOCIETY - NAFIPS LA English DT Proceedings Paper CT 1996 Biennial Conference of the North-American-Fuzzy-Information-Processing-Society CY JUN 19-22, 1996 CL BERKELEY, CA SP N Amer Fuzzy Informat Proc Soc, Berkeley Initiat Soft Comp, IEEE, Neural Networks Council, IEEE, Syst Man & Cybernet Soc, Univ Calif, Berkeley C1 USN,AIR WARFARE CTR,WEAPONS DIV,TARGET RECOGNIT SECT,CHINA LAKE,CA 93555. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3225-3 PY 1996 BP 221 EP 224 PG 4 WC Computer Science, Artificial Intelligence; Computer Science, Cybernetics SC Computer Science GA BF95N UT WOS:A1996BF95N00044 ER PT B AU Boos, JB Kruppa, W Park, D Molnar, B Bass, R Goldenberg, M Bennett, BR Mittereder, J AF Boos, JB Kruppa, W Park, D Molnar, B Bass, R Goldenberg, M Bennett, BR Mittereder, J GP IEEE TI Pd/Pt/Au and AuGe/Ni/Pt/Au ohmic contacts for AlSb/InAs HEMTs SO 1996 EIGHTH INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE AND RELATED MATERIALS LA English DT Proceedings Paper CT 8th International Conference on Indium Phosphide and Related Materials CY APR 21-25, 1996 CL SCHWABISCH GMUND, GERMANY SP Verband Deut Elektrotechniker, Informat Technol Gesell, IEEE, Lasers & Electro Opt Soc, IEEE, Electron Devices Soc, AIXTRON, Alcatel, Bosch Telecom, Daimler Benz, EOARD, Epichem, Siemens, STS, Thomas Swan, European Commiss DG XIII C1 USN,RES LAB,WASHINGTON,DC 20375. RI Bennett, Brian/A-8850-2008 OI Bennett, Brian/0000-0002-2437-4213 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3284-9 PY 1996 BP 354 EP 357 PG 4 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics SC Engineering; Materials Science; Optics GA BF52F UT WOS:A1996BF52F00095 ER PT B AU Kruppa, W Boos, JB Bennett, BR Goldenberg, M AF Kruppa, W Boos, JB Bennett, BR Goldenberg, M GP IEEE TI Traps and the kink effect in AlSb/InAs HEMTs SO 1996 EIGHTH INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE AND RELATED MATERIALS LA English DT Proceedings Paper CT 8th International Conference on Indium Phosphide and Related Materials CY APR 21-25, 1996 CL SCHWABISCH GMUND, GERMANY SP Verband Deut Elektrotechniker, Informat Technol Gesell, IEEE, Lasers & Electro Opt Soc, IEEE, Electron Devices Soc, AIXTRON, Alcatel, Bosch Telecom, Daimler Benz, EOARD, Epichem, Siemens, STS, Thomas Swan, European Commiss DG XIII C1 USN,RES LAB,WASHINGTON,DC 20375. RI Bennett, Brian/A-8850-2008 OI Bennett, Brian/0000-0002-2437-4213 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3284-9 PY 1996 BP 458 EP 461 PG 4 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics SC Engineering; Materials Science; Optics GA BF52F UT WOS:A1996BF52F00121 ER PT B AU Monaghan, TP AF Monaghan, TP GP IEEE TI Fault tolerant system design in the concept exploration stage of a mission critical computing system SO 1996 IEEE AEROSPACE APPLICATIONS CONFERENCE, PROCEEDINGS, VOL 1 LA English DT Proceedings Paper CT 1996 IEEE Aerospace Applications Conference CY FEB 03-10, 1996 CL ASPEN, CO SP IEEE Aerosp & Electr Syst Soc C1 USN,AIR WARFARE CTR,WARMINSTER,PA 18974. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3196-6 PY 1996 BP 321 EP 333 PG 13 WC Engineering, Aerospace; Engineering, Multidisciplinary; Engineering, Electrical & Electronic SC Engineering GA BF08Y UT WOS:A1996BF08Y00023 ER PT B AU Denson, D AF Denson, D GP IEEE TI How the Department of the Navy translates space support requirements into program plans SO 1996 IEEE AEROSPACE APPLICATIONS CONFERENCE, PROCEEDINGS, VOL 3 LA English DT Proceedings Paper CT 1996 IEEE Aerospace Applications Conference CY FEB 03-10, 1996 CL ASPEN, CO SP IEEE Aerosp & Electr Syst Soc C1 USN,SPACE & NAVAL WARFARE SYST COMMAND,WASHINGTON,DC 20363. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3196-6 PY 1996 BP 7 EP 27 PG 21 WC Engineering, Aerospace; Engineering, Electrical & Electronic SC Engineering GA BF09A UT WOS:A1996BF09A00001 ER PT B AU Houck, SW Hepp, RG Morris, MJ Benne, ME AF Houck, SW Hepp, RG Morris, MJ Benne, ME GP IEEE TI Pressure sensitive paint flight test SO 1996 IEEE AEROSPACE APPLICATIONS CONFERENCE, PROCEEDINGS, VOL 4 LA English DT Proceedings Paper CT 1996 IEEE Aerospace Applications Conference CY FEB 03-10, 1996 CL ASPEN, CO SP IEEE Aerosp & Electr Syst Soc C1 USN,AIR WARFARE CTR,PATUXENT RIVER,MD 20670. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3196-6 PY 1996 BP 241 EP 252 PG 12 WC Engineering, Aerospace; Engineering, Electrical & Electronic SC Engineering GA BF09B UT WOS:A1996BF09B00016 ER PT B AU Marshall, PW Dale, CJ LaBel, KA Flanegan, MC AF Marshall, PW Dale, CJ LaBel, KA Flanegan, MC GP IEEE TI Space radiation effects in high performance fiber optic data links for satellite data management SO 1996 IEEE AEROSPACE APPLICATIONS CONFERENCE, PROCEEDINGS, VOL 4 LA English DT Proceedings Paper CT 1996 IEEE Aerospace Applications Conference CY FEB 03-10, 1996 CL ASPEN, CO SP IEEE Aerosp & Electr Syst Soc C1 USN,RES LAB,WASHINGTON,DC 20375. RI shao, chongyun/M-6620-2013 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3196-6 PY 1996 BP 423 EP 437 PG 15 WC Engineering, Aerospace; Engineering, Electrical & Electronic SC Engineering GA BF09B UT WOS:A1996BF09B00028 ER PT B AU Therrien, CW Jenkins, WK AF Therrien, CW Jenkins, WK BE Lervik, JM Waldemar, P TI New insights in the analysis of polynomial adaptive filters SO 1996 IEEE DIGITAL SIGNAL PROCESSING WORKSHOP, PROCEEDINGS LA English DT Proceedings Paper CT 1996 IEEE Digital Signal Processing Workshop (DSPWS-96) CY SEP 01-04, 1996 CL LOEN, NORWAY SP IEEE, NORSIG, ABB Technol, NERA C1 USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3629-1 PY 1996 BP 382 EP 385 DI 10.1109/DSPWS.1996.555541 PG 4 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA BG39X UT WOS:A1996BG39X00097 ER PT B AU SchmidtNielsen, A Brock, DP AF SchmidtNielsen, A Brock, DP GP IEEE TI Speaker recognizability testing for voice coders SO 1996 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, CONFERENCE PROCEEDINGS, VOLS 1-6 LA English DT Proceedings Paper CT 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 96) CY MAY 07-10, 1996 CL ATLANTA, GA SP IEEE, Signal Proc Soc C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3192-3 J9 INT CONF ACOUST SPEE PY 1996 BP 1149 EP 1152 PG 4 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA BG26G UT WOS:A1996BG26G00290 ER PT B AU Harrison, BF Vaccaro, RJ Tufts, DW AF Harrison, BF Vaccaro, RJ Tufts, DW GP IEEE TI Matched-field localization with many uncertain environmental parameters: Experimental data results SO 1996 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, CONFERENCE PROCEEDINGS, VOLS 1-6 LA English DT Proceedings Paper CT 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 96) CY MAY 07-10, 1996 CL ATLANTA, GA SP IEEE, Signal Proc Soc C1 USN,UNDERSEA WARFARE CTR,NEWPORT,RI 02841. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3192-3 J9 INT CONF ACOUST SPEE PY 1996 BP 1193 EP 1196 PG 4 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA BG26G UT WOS:A1996BG26G00301 ER PT B AU Wilbur, J McDonald, RJ AF Wilbur, J McDonald, RJ GP IEEE TI Resonant pole identification from the acoustic backscatter of small submerged multi-specular elastic targets SO 1996 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, CONFERENCE PROCEEDINGS, VOLS 1-6 LA English DT Proceedings Paper CT 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 96) CY MAY 07-10, 1996 CL ATLANTA, GA SP IEEE, Signal Proc Soc C1 USN,CTR SURFACE WARFARE,DAHLGREN DIV,SONAR & IMAGE PROC DIV,COASTAL SYST STN,RES & TECHNOL DEPT,PANAMA CITY,FL 32408. NR 0 TC 0 Z9 0 U1 0 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3192-3 J9 INT CONF ACOUST SPEE PY 1996 BP 2785 EP 2788 PG 4 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA BG26G UT WOS:A1996BG26G00702 ER PT B AU Mehta, SK Fay, J Maciejewski, P AF Mehta, SK Fay, J Maciejewski, P GP IEEE TI Modified Eckart post-beamformer filter for improved detection using broadband features SO 1996 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, CONFERENCE PROCEEDINGS, VOLS 1-6 LA English DT Proceedings Paper CT 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 96) CY MAY 07-10, 1996 CL ATLANTA, GA SP IEEE, Signal Proc Soc C1 USN,UNDERSEA WARFARE CTR,DIV NEWPORT,NEW LONDON,CT 06320. NR 0 TC 0 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3192-3 J9 INT CONF ACOUST SPEE PY 1996 BP 3045 EP 3048 PG 4 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA BG26G UT WOS:A1996BG26G00768 ER PT B AU Lynch, R Willett, P AF Lynch, R Willett, P GP IEEE TI Classification with a combined information test SO 1996 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, CONFERENCE PROCEEDINGS, VOLS 1-6 LA English DT Proceedings Paper CT 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 96) CY MAY 07-10, 1996 CL ATLANTA, GA SP IEEE, Signal Proc Soc C1 USN,UNDERSEA WARFARE CTR,NEW LONDON,CT 06320. OI Willett, Peter/0000-0001-8443-5586 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3192-3 J9 INT CONF ACOUST SPEE PY 1996 BP 3061 EP 3064 PG 4 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA BG26G UT WOS:A1996BG26G00772 ER PT S AU Healey, AJ Marco, DB McGhee, RB AF Healey, AJ Marco, DB McGhee, RB GP IEEE, ROBOT & AUTOMAT SOC TI Autonomous underwater vehicle control coordination using a tri-level hybrid software architecture SO 1996 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION, PROCEEDINGS, VOLS 1-4 SE IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION LA English DT Proceedings Paper CT 1996 IEEE International Conference on Robotics and Automation CY APR 22-28, 1996 CL MINNEAPOLIS, MN SP IEEE, Robot & Automat Soc C1 USN,POSTGRAD SCH,AUTONOMOUS UNDERWATER VEHICLE LAB,MONTEREY,CA 93943. NR 0 TC 17 Z9 17 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 1050-4729 BN 0-7803-2989-9 J9 IEEE INT CONF ROBOT PY 1996 BP 2149 EP 2159 PG 11 WC Automation & Control Systems SC Automation & Control Systems GA BF68P UT WOS:A1996BF68P00337 ER PT S AU Yun, XP Sarkar, N AF Yun, XP Sarkar, N GP IEEE, ROBOT & AUTOMAT SOC TI Dynamic feedback control of vehicles with two steerable wheels SO 1996 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION, PROCEEDINGS, VOLS 1-4 SE IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION LA English DT Proceedings Paper CT 1996 IEEE International Conference on Robotics and Automation CY APR 22-28, 1996 CL MINNEAPOLIS, MN SP IEEE, Robot & Automat Soc C1 USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943. NR 0 TC 11 Z9 11 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 1050-4729 BN 0-7803-2989-9 J9 IEEE INT CONF ROBOT PY 1996 BP 3105 EP 3110 PG 6 WC Automation & Control Systems SC Automation & Control Systems GA BF68P UT WOS:A1996BF68P00487 ER PT B AU Liu, ST Jenkins, WC AF Liu, ST Jenkins, WC GP IEEE TI Effect of total dose radiation on FETs fabricated in UNIBOND(TM) SOI material SO 1996 IEEE INTERNATIONAL SOI CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1996 IEEE International SOI Conference CY SEP 30-OCT 03, 1996 CL SANIBEL ISLAND, FL SP IEEE, Electron Devices Soc C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3316-0 PY 1996 BP 94 EP 95 DI 10.1109/SOI.1996.552510 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA BG49M UT WOS:A1996BG49M00046 ER PT B AU Mathew, J Meger, RA Gregor, JA Murphy, DP Pechacek, RE Fernsler, RF Manheimer, WM AF Mathew, J Meger, RA Gregor, JA Murphy, DP Pechacek, RE Fernsler, RF Manheimer, WM GP IEEE BOSTON SECT TI Electronically steerable plasma mirror SO 1996 IEEE INTERNATIONAL SYMPOSIUM ON PHASED ARRAY SYSTEMS AND TECHNOLOGY: REVOLUTIONARY DEVELOPMENTS IN PHASED ARRAYS LA English DT Proceedings Paper CT 1996 IEEE International Symposium on Phased Array Systems and Technology - Revolutionary Developments in Phased Arrays CY OCT 15-18, 1996 CL BOSTON, MA SP IEEE Boston Sect, IEEE Aerosp & Electr Syst Soc, IEEE Commun Soc, IEEE Antennas & Propagat Soc, IEEE Microwave Theory & Tech Soc AB Electronic steering of microwave beams using a plasma mirror allows the use of wide instantaneous bandwidth waveforms. Areas of application for a plasma mirror based antenna system include ship self-defense, high-resolution radar imaging, high data rate communications, spread spectrum links, and remote sensing. Recent experiments have demonstrated that a planar plasma minor immersed in a magnetic field, can be formed with electron densities high enough to reflect X-band microwaves. The plasma sheet can be steered in elevation by tilting the magnetic field, and steering in azimuth may be accomplished by designating cathode initiation sites. The measured radiation pattern for a 90 degrees reflection from a 50 cm x 60 em plasma mirror is very similar to that obtained from a metal mirror of comparable dimensions. As a reflector, the plasma minor exhibits extremely low loss, the reflectivity is very nearly 100%, and the sidelobes are down by >20 dB. Switching rimes between successive mirror orientations may be less than IO mu s. RP Mathew, J (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 0 TC 5 Z9 6 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3232-6 PY 1996 BP 58 EP 62 PG 5 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BG87R UT WOS:A1996BG87R00013 ER PT B AU Mokole, EL AF Mokole, EL GP IEEE BOSTON SECT TI Behavior of ultrawideband-radar array antennas SO 1996 IEEE INTERNATIONAL SYMPOSIUM ON PHASED ARRAY SYSTEMS AND TECHNOLOGY: REVOLUTIONARY DEVELOPMENTS IN PHASED ARRAYS LA English DT Proceedings Paper CT 1996 IEEE International Symposium on Phased Array Systems and Technology - Revolutionary Developments in Phased Arrays CY OCT 15-18, 1996 CL BOSTON, MA SP IEEE Boston Sect, IEEE Aerosp & Electr Syst Soc, IEEE Commun Soc, IEEE Antennas & Propagat Soc, IEEE Microwave Theory & Tech Soc AB This paper discusses general issues concerning ultrawideband (UWB) arrays and specifically analyzes time-delay scanning linear arrays of thin dipoles that are excited by a single-cycle sine, when the effects of mutual coupling are neglected. In particular, when the array consists of eleven equally spaced and equally weighted dipoles, the time-domain radiated far field for broadside scan and the energy-density pattern for several scan angles are determined as a function of observation angle. Also, beamwidth is defined in terms of the energy-density pattern and is calculated versus different scan angles for selected inter-element spacings. RP Mokole, EL (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3232-6 PY 1996 BP 113 EP 118 PG 6 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BG87R UT WOS:A1996BG87R00024 ER PT B AU Rao, JBL Trunk, GV Patel, DP AF Rao, JBL Trunk, GV Patel, DP GP IEEE BOSTON SECT TI Two low-cost phased arrays SO 1996 IEEE INTERNATIONAL SYMPOSIUM ON PHASED ARRAY SYSTEMS AND TECHNOLOGY: REVOLUTIONARY DEVELOPMENTS IN PHASED ARRAYS LA English DT Proceedings Paper CT 1996 IEEE International Symposium on Phased Array Systems and Technology - Revolutionary Developments in Phased Arrays CY OCT 15-18, 1996 CL BOSTON, MA SP IEEE Boston Sect, IEEE Aerosp & Electr Syst Soc, IEEE Commun Soc, IEEE Antennas & Propagat Soc, IEEE Microwave Theory & Tech Soc AB In a phased array antenna, the phase shifters (or T/R modules in an active aperture phased array) with their beam-steering control circuitry along with the feed network account for the major hardware cost. This paper presents two antenna array configurations that use simpler feed, simpler phase-shifting and beam-steering control circuitry for realizing low-cost phased arrays. Both are lens configurations. The first one uses a Radant lens, which provides a medium that is loaded with diodes and provides the needed phase shift by switching the diodes on and off. The other configuration employs a ferroelectric dielectric material whose dielectric constant can be varied with an applied DC bias voltage. It is shown that the ferroelectric lens may have further advantages of smaller thickness, simpler beam-steering controls and lower cost. RP Rao, JBL (reprint author), USN,RES LAB,DIV RADAR,WASHINGTON,DC 20375, USA. NR 0 TC 6 Z9 6 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3232-6 PY 1996 BP 119 EP 124 PG 6 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BG87R UT WOS:A1996BG87R00025 ER PT B AU Trunk, GV Patel, DP AF Trunk, GV Patel, DP GP IEEE BOSTON SECT TI Optimal number of phased array faces for horizon surveillance SO 1996 IEEE INTERNATIONAL SYMPOSIUM ON PHASED ARRAY SYSTEMS AND TECHNOLOGY: REVOLUTIONARY DEVELOPMENTS IN PHASED ARRAYS LA English DT Proceedings Paper CT 1996 IEEE International Symposium on Phased Array Systems and Technology - Revolutionary Developments in Phased Arrays CY OCT 15-18, 1996 CL BOSTON, MA SP IEEE Boston Sect, IEEE Aerosp & Electr Syst Soc, IEEE Commun Soc, IEEE Antennas & Propagat Soc, IEEE Microwave Theory & Tech Soc AB The problem of tile optimal number of phased army faces for performing 360 degrees horizon surveillance is considered. Assuming the detection performance is the same in all beam positions and the total number of T/R modules is constant, it is shown that the optimal number of array faces is three. This is true whether the arrays are operating simultaneously or sequentially. RP Trunk, GV (reprint author), USN,RES LAB,DIV RADAR,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3232-6 PY 1996 BP 214 EP 216 PG 3 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BG87R UT WOS:A1996BG87R00044 ER PT B AU Trunk, GV Hughes, PK AF Trunk, GV Hughes, PK GP IEEE BOSTON SECT TI Multi-beam phased arrays using dual apertures SO 1996 IEEE INTERNATIONAL SYMPOSIUM ON PHASED ARRAY SYSTEMS AND TECHNOLOGY: REVOLUTIONARY DEVELOPMENTS IN PHASED ARRAYS LA English DT Proceedings Paper CT 1996 IEEE International Symposium on Phased Array Systems and Technology - Revolutionary Developments in Phased Arrays CY OCT 15-18, 1996 CL BOSTON, MA SP IEEE Boston Sect, IEEE Aerosp & Electr Syst Soc, IEEE Commun Soc, IEEE Antennas & Propagat Soc, IEEE Microwave Theory & Tech Soc AB The problem of transmitting multiple radar beams with an active-aperture phased arrays is considered. Several approaches are considered and the approach selected is to use a dual aperture which consists of an active-aperture transmit array and a large receive array. It is shown that the optimal operating Feint is where the costs of the small, but expensive, transmit array is equal to the large, but simpler, receive array. Presently under consideration for the receive array are (1) phase shifters, (2) space feed lenses, and (3) a fiber optic feed. RP Trunk, GV (reprint author), USN,RES LAB,CODE 5301,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3232-6 PY 1996 BP 416 EP 418 PG 3 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BG87R UT WOS:A1996BG87R00083 ER PT B AU Frankel, MY Matthews, PJ Esman, RD AF Frankel, MY Matthews, PJ Esman, RD GP IEEE BOSTON SECT TI Wideband array transmitter with two-dimensional fiber-optic beam steering SO 1996 IEEE INTERNATIONAL SYMPOSIUM ON PHASED ARRAY SYSTEMS AND TECHNOLOGY: REVOLUTIONARY DEVELOPMENTS IN PHASED ARRAYS LA English DT Proceedings Paper CT 1996 IEEE International Symposium on Phased Array Systems and Technology - Revolutionary Developments in Phased Arrays CY OCT 15-18, 1996 CL BOSTON, MA SP IEEE Boston Sect, IEEE Aerosp & Electr Syst Soc, IEEE Commun Soc, IEEE Antennas & Propagat Soc, IEEE Microwave Theory & Tech Soc AB We demonstrate a wideband transmit array with two-dimensional fiber-optic true time-delay steering. The separate azimuth and elevation steering control stages are based on a simple dispersive fiber-optic prism approach. The prism's individual fiber feeds include an amount of dispersion proportional to the relative position of the radiating element in the array. The microwave signals are transmitted on wavelength tunable optical carriers and are properly time-delayed by setting the azimuth and the elevation control wavelengths. The array is comprised of flared-notch elements arranged in a 4x4 configuration, and the transmitter shows a microwave component-limited bandwidth of 6-18 GHz. The anechoic chamber two-dimensional array pattern measurements show frequency-squint-free independent beam steering over +/-40 degrees in azimuth and +/-40 degrees in elevation. RP Frankel, MY (reprint author), USN,RES LAB,CODE 5672,WASHINGTON,DC 20375, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3232-6 PY 1996 BP 425 EP 428 PG 4 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BG87R UT WOS:A1996BG87R00085 ER PT S AU Krowne, CM AF Krowne, CM BE Ranson, RG Pollard, RD TI 3D dyadic Green's function for radially inhomogeneous circular ferrite circulator SO 1996 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-3 SE IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST LA English DT Proceedings Paper CT 1996 IEEE MTT-S International Microwave Symposium CY JUN 17-21, 1996 CL SAN FRANCISCO, CA SP IEEE, MTT Soc C1 USN,RES LAB,DIV ELECTR SCI & TECHNOL,MICROWAVE TECHNOL BRANCH,WASHINGTON,DC 20375. NR 0 TC 7 Z9 7 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0149-645X BN 0-7803-3247-4 J9 IEEE MTT-S PY 1996 BP 121 EP 124 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BF95U UT WOS:A1996BF95U00028 ER PT S AU Frankel, MY Matthews, PJ Esman, RD AF Frankel, MY Matthews, PJ Esman, RD BE Ranson, RG Pollard, RD TI Two-dimensional fiber-optic control of a true time-steered array transmitter SO 1996 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-3 SE IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST LA English DT Proceedings Paper CT 1996 IEEE MTT-S International Microwave Symposium CY JUN 17-21, 1996 CL SAN FRANCISCO, CA SP IEEE, MTT Soc C1 USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0149-645X BN 0-7803-3247-4 J9 IEEE MTT-S PY 1996 BP 1577 EP 1580 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BF95U UT WOS:A1996BF95U00367 ER PT B AU Turflinger, TL Davey, MV Bings, JP AF Turflinger, TL Davey, MV Bings, JP GP IEEE TI Radiation effects in analog CMOS analog-to-digital converters SO 1996 IEEE RADIATION EFFECTS DATA WORKSHOP, WORKSHOP RECORD LA English DT Proceedings Paper CT 1996 IEEE Radiation Effects Data Workshop / IEEE Nuclear and Space Radiation Effects Conference (NSREC 96) CY JUL 19, 1996 CL INDIAN WELLS, CA SP IEEE Nucl & Plasma Sci Soc AB Analog CMOS circuitry is becoming common in the marketplace. Two commercial ADC are tested in the total dose and dose rate environments. Test results and applicability to system use are discussed. RP Turflinger, TL (reprint author), USN,CTR SURFACE WARFARE,CRANE DIV,CRANE,IN 47522, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3398-5 PY 1996 BP 6 EP 12 DI 10.1109/REDW.1996.574182 PG 7 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA BH34G UT WOS:A1996BH34G00002 ER PT B AU Archer, M Heitmeyer, C AF Archer, M Heitmeyer, C BE Jeffay, K Zhao, W TI Mechanical verification of timed automata: A case study SO 1996 IEEE REAL-TIME TECHNOLOGY AND APPLICATIONS SYMPOSIUM, PROCEEDINGS LA English DT Proceedings Paper CT 1996 IEEE Real-Time Technology and Applications Symposium CY JUN 10-12, 1996 CL BROOKLINE, MA SP IEEE, Comp Soc, Tech Comm Real Time Syst C1 USN,RES LAB,WASHINGTON,DC 20375. RI Heitmeyer, Constance/F-6500-2011; OI Heitmeyer, Constance/0000-0001-7942-9309 NR 0 TC 4 Z9 4 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-7448-2 PY 1996 BP 192 EP 203 DI 10.1109/RTTAS.1996.509536 PG 12 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BF90D UT WOS:A1996BF90D00020 ER PT S AU Moskowitz, IS Greenwald, SJ Kang, MH AF Moskowitz, IS Greenwald, SJ Kang, MH GP IEEE, COMP SOC TI An analysis of the timed Z-channel SO 1996 IEEE SYMPOSIUM ON SECURITY AND PRIVACY, PROCEEDINGS SE PROCEEDINGS: IEEE SYMPOSIUM ON SECURITY AND PRIVACY LA English DT Proceedings Paper CT 1996 IEEE Symposium on Security and Privacy CY MAY 06-08, 1996 CL OAKLAND, CA SP IEEE, Comp Soc, Tech Comm Secur & Privacy, Int Assoc Cryptol Res C1 USN,RES LAB,DIV INFORMAT TECHNOL,CTR HIGH ASSURANCE COMP SYST,WASHINGTON,DC 20375. NR 0 TC 10 Z9 13 U1 0 U2 1 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1081-6011 BN 0-7803-3527-9 J9 P IEEE S SECUR PRIV PY 1996 BP 2 EP 11 DI 10.1109/SECPRI.1996.502664 PG 10 WC Computer Science, Information Systems SC Computer Science GA BF68Q UT WOS:A1996BF68Q00001 ER PT S AU Irvine, CE AF Irvine, CE GP IEEE, COMP SOC TI Goals for computer security education SO 1996 IEEE SYMPOSIUM ON SECURITY AND PRIVACY, PROCEEDINGS SE PROCEEDINGS: IEEE SYMPOSIUM ON SECURITY AND PRIVACY LA English DT Proceedings Paper CT 1996 IEEE Symposium on Security and Privacy CY MAY 06-08, 1996 CL OAKLAND, CA SP IEEE, Comp Soc, Tech Comm Secur & Privacy, Int Assoc Cryptol Res C1 USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943. NR 0 TC 2 Z9 2 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1081-6011 BN 0-7803-3527-9 J9 P IEEE S SECUR PRIV PY 1996 BP 24 EP 25 PG 2 WC Computer Science, Information Systems SC Computer Science GA BF68Q UT WOS:A1996BF68Q00003 ER PT S AU Syverson, P AF Syverson, P GP IEEE, COMP SOC TI Limitations on design principles for public key protocols SO 1996 IEEE SYMPOSIUM ON SECURITY AND PRIVACY, PROCEEDINGS SE PROCEEDINGS: IEEE SYMPOSIUM ON SECURITY AND PRIVACY LA English DT Proceedings Paper CT 1996 IEEE Symposium on Security and Privacy CY MAY 06-08, 1996 CL OAKLAND, CA SP IEEE, Comp Soc, Tech Comm Secur & Privacy, Int Assoc Cryptol Res C1 USN,RES LAB,CTR HIGH ASSURANCE COMP SYST,WASHINGTON,DC 20375. NR 0 TC 11 Z9 12 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1081-6011 BN 0-7803-3527-9 J9 P IEEE S SECUR PRIV PY 1996 BP 62 EP 72 DI 10.1109/SECPRI.1996.502670 PG 11 WC Computer Science, Information Systems SC Computer Science GA BF68Q UT WOS:A1996BF68Q00008 ER PT B AU Xie, GG Lam, SS AF Xie, GG Lam, SS BE Ural, H TI An efficient adaptive search algorithm for scheduling real-time traffic SO 1996 INTERNATIONAL CONFERENCE ON NETWORK PROTOCOLS, PROCEEDINGS LA English DT Proceedings Paper CT 1996 International Conference on Network Protocols CY OCT 29-NOV 01, 1996 CL COLUMBUS, OH SP IEEE Comp Soc Tech Comm Distributed Proc, Informat Proc Soc Japan AB For many service disciplines that provide delay guarantees, the scheduler of a channel repeatedly searches for the smallest element in a set of priority values (or deadlines). It is required that each search finishes within a time bound. Furthermore, the search algorithm should be highly efficient. To meet these requirements, we have developed a search algorithm based upon a new data structure, called adaptive heap it behaves like a heap most of the time, but adaptively changes its strategy when necessary to satisfy the time bound. We show that the algorithm has optimal worst-case time complexity and good average performance. To further improve efficiency, the basic algorithm is extended to include the use of group scheduling. We present empirical results on the performance of adaptive heap search with and without group scheduling. We conclude that adaptive heap search performs as intended, and that group scheduling provides a substantial reduction in the scheduler's work when channel utilization is high. RP Xie, GG (reprint author), USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-7453-9 PY 1996 BP 14 EP 22 DI 10.1109/ICNP.1996.564885 PG 9 WC Computer Science, Theory & Methods SC Computer Science GA BG89E UT WOS:A1996BG89E00002 ER PT S AU Lee, DC AF Lee, DC BE Iskander, MF Guest, CC Place, J Fitzgerald, S TI An analytic model for output buffer allocation of packet switches SO 1996 INTERNATIONAL CONFERENCE ON SIMULATION AND MULTIMEDIA IN ENGINEERING EDUCATION (ICSEE '96) / COMMUNICATION NETWORKS MODELING AND SIMULATION CONFERENCE: PROCEEDINGS OF THE 1996 WESTERN MULTICONFERENCE SE SIMULATION SERIES LA English DT Proceedings Paper CT 1996 International Conference on Simulation and Multimedia in Engineering Education (ICSEE 96) / Communication Networks Modeling and Simulation Conference CY JAN 14-17, 1996 CL SAN DIEGO, CA SP Soc Comp Simulat DE network; telecommunications; performance analysis; queueing; optimization AB A performance model of synchronous, nonblocking, output-queue, packet switches is presented. This paper illustrates some mathematical techniques for analyzing switch performance and efficiently allocating buffer space to different links. Queueing delay at the output queue and the probability of packet drop are used as performance measures. For an infinite buffer model, the expected queueing delay is derived as an explicit function of throughput and number of ports. For a finite buffer model, an efficient method of computing the packet-drop probability is introduced. It is shown that the packet-drop probability for the finite buffer asymptotically decreases geometrically as the buffer size increases. Quasi-optimal output buffer allocation scheme based on geometric approximation of the packet-drop probability is suggested in order to make a simple algorithm. RP Lee, DC (reprint author), USN,RES LAB,CODE 8141,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC COMPUTER SIMULATION INT PI SAN DIEGO PA PO BOX 17900, SAN DIEGO, CA 92177 SN 0735-9276 BN 1-56555-084-6 J9 SIMUL SERIES PY 1996 VL 28 IS 1 BP 239 EP 245 PG 7 WC Computer Science, Hardware & Architecture; Computer Science, Interdisciplinary Applications SC Computer Science GA BG98H UT WOS:A1996BG98H00039 ER PT B AU Kramer, R Mensh, D Feinberg, JM Beadling, R McGraw, J AF Kramer, R Mensh, D Feinberg, JM Beadling, R McGraw, J GP AMER SOC NAVAL ENGINEERS TI Virtual notional ship simulation supporting SC-21 design SO 1996 MODELING, SIMULATION AND VIRTUAL PROTOTYPING CONFERENCE: A FORUM FOR THE ADVANCEMENT OF MODELING AND SIMULATION APPLICATIONS AND TECHNOLOGY IN THE ACQUISITION PROCESS LA English DT Proceedings Paper CT 1996 Modeling, Simulation and Virtual Prototyping Conference CY JUN 24-26, 1996 CL CRYSTAL CITY, VA SP Amer Soc Naval Engineers, Off Assistant Secretary Navy Res Dev & Acquisit C1 USN,CTR SURFACE WARFARE,CARDEROCK DIV,BETHESDA,MD 20084. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMERICAN SOCIETY NAVAL ENGINEERS PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314 PY 1996 BP 43 EP 52 PG 10 WC Engineering, Marine SC Engineering GA BF92D UT WOS:A1996BF92D00003 ER PT J AU Santos, GM Branch, AM AF Santos, GM Branch, AM GP AMER SOC NAVAL ENGINEERS TI The navy T&E modeling and simulation plan in the changing acquisition process SO 1996 MODELING, SIMULATION AND VIRTUAL PROTOTYPING CONFERENCE: A FORUM FOR THE ADVANCEMENT OF MODELING AND SIMULATION APPLICATIONS AND TECHNOLOGY IN THE ACQUISITION PROCESS LA English DT Proceedings Paper CT 1996 Modeling, Simulation and Virtual Prototyping Conference CY JUN 24-26, 1996 CL CRYSTAL CITY, VA SP Amer Soc Naval Engineers, Off Assistant Secretary Navy Res Dev & Acquisit C1 USN,UNDERSEA WARFARE CTR,NEWPORT,RI 02841. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN SOCIETY NAVAL ENGINEERS PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314 PY 1996 BP 113 EP 122 PG 10 WC Engineering, Marine SC Engineering GA BF92D UT WOS:A1996BF92D00007 ER PT J AU Correll, K Caddell, M Croteau, R LeHerissier, W AF Correll, K Caddell, M Croteau, R LeHerissier, W GP AMER SOC NAVAL ENGINEERS TI Undersea warfare networked modeling and simulation SO 1996 MODELING, SIMULATION AND VIRTUAL PROTOTYPING CONFERENCE: A FORUM FOR THE ADVANCEMENT OF MODELING AND SIMULATION APPLICATIONS AND TECHNOLOGY IN THE ACQUISITION PROCESS LA English DT Proceedings Paper CT 1996 Modeling, Simulation and Virtual Prototyping Conference CY JUN 24-26, 1996 CL CRYSTAL CITY, VA SP Amer Soc Naval Engineers, Off Assistant Secretary Navy Res Dev & Acquisit C1 USN,UNDERSEA WARFARE CTR,NEW LONDON DETACHMENT,NEW LONDON,CT. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN SOCIETY NAVAL ENGINEERS PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314 PY 1996 BP 165 EP 173 PG 9 WC Engineering, Marine SC Engineering GA BF92D UT WOS:A1996BF92D00011 ER PT B AU Sandberg, WC Ramamurti, R Lohner, R AF Sandberg, WC Ramamurti, R Lohner, R GP AMER SOC NAVAL ENGINEERS TI Unsteady simulations for littoral undersea warfare support SO 1996 MODELING, SIMULATION AND VIRTUAL PROTOTYPING CONFERENCE: A FORUM FOR THE ADVANCEMENT OF MODELING AND SIMULATION APPLICATIONS AND TECHNOLOGY IN THE ACQUISITION PROCESS LA English DT Proceedings Paper CT 1996 Modeling, Simulation and Virtual Prototyping Conference CY JUN 24-26, 1996 CL CRYSTAL CITY, VA SP Amer Soc Naval Engineers, Off Assistant Secretary Navy Res Dev & Acquisit C1 USN,RES LAB,COMPUTAT PHYS & FLUID DYNAM LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMERICAN SOCIETY NAVAL ENGINEERS PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314 PY 1996 BP 335 EP 359 PG 25 WC Engineering, Marine SC Engineering GA BF92D UT WOS:A1996BF92D00022 ER PT B AU Tursi, R BissoonDath, N Janevic, J AF Tursi, R BissoonDath, N Janevic, J GP AMER SOC NAVAL ENGINEERS TI US Navy fork lift mast system: Virtual prototype and validation - A ''smart'' development approach SO 1996 MODELING, SIMULATION AND VIRTUAL PROTOTYPING CONFERENCE: A FORUM FOR THE ADVANCEMENT OF MODELING AND SIMULATION APPLICATIONS AND TECHNOLOGY IN THE ACQUISITION PROCESS LA English DT Proceedings Paper CT 1996 Modeling, Simulation and Virtual Prototyping Conference CY JUN 24-26, 1996 CL CRYSTAL CITY, VA SP Amer Soc Naval Engineers, Off Assistant Secretary Navy Res Dev & Acquisit C1 NSWC,CARDEROCK DIV,PHILADELPHIA,PA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN SOCIETY NAVAL ENGINEERS PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314 PY 1996 BP 393 EP 406 PG 14 WC Engineering, Marine SC Engineering GA BF92D UT WOS:A1996BF92D00026 ER PT J AU Goldberg, AJ Gover, RE AF Goldberg, AJ Gover, RE GP AMER SOC NAVAL ENGINEERS TI CRUISE-Missiles electronic warfare simulation SO 1996 MODELING, SIMULATION AND VIRTUAL PROTOTYPING CONFERENCE: A FORUM FOR THE ADVANCEMENT OF MODELING AND SIMULATION APPLICATIONS AND TECHNOLOGY IN THE ACQUISITION PROCESS LA English DT Proceedings Paper CT 1996 Modeling, Simulation and Virtual Prototyping Conference CY JUN 24-26, 1996 CL CRYSTAL CITY, VA SP Amer Soc Naval Engineers, Off Assistant Secretary Navy Res Dev & Acquisit C1 USN,RES LAB,TACT ELECT WARFARE DIV,ADV TECHNIQUES BRANCH,WASHINGTON,DC. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN SOCIETY NAVAL ENGINEERS PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314 PY 1996 BP 407 EP 426 PG 20 WC Engineering, Marine SC Engineering GA BF92D UT WOS:A1996BF92D00027 ER PT B AU Buss, AH AF Buss, AH BE Charnes, JM Morrice, DJ Brunner, DT Swain, JJ TI Modeling with event graphs SO 1996 WINTER SIMULATION CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1996 Winter Simulation Conference (WSC 96) CY DEC 08-11, 1996 CL CORONADO, CA SP Amer Stat Assoc, Assoc Comp Machinery, SIGSIM, Inst Operat Res & Management Sci, Inst Operat Res & Management Sci, Coll Simulat, IEEE Comp Soc, IEEE Syst Man & Cybernet Soc, Inst Ind Engineers, NIST, Soc Comp Simulat Int AB Event Graphs are a way of graphically reprsenting discrete-event simulation models. Also known as ''Simulation Graphs,'' they have a minimalist design, with a single type of node and two types of edges with up to three options. Despite this simplicity Event Graphs are extremely powerful. The Event Graph is the only graphical paradigm that directly models the event list logic. There are no limitations to the ability of Event Graphs to create a simulation model for any circumstance. Their simplicity, together with their extensibility, make them an ideal tool for rapid construction and prototyping of simulation models. In this paper we will demonstrate the ability of Event Graphs to leverage simple models into more complex ones with very few additional features. RP Buss, AH (reprint author), USN,POSTGRAD SCH,DEPT OPERAT RES,MONTEREY,CA 93943, USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3383-7 PY 1996 BP 153 EP 160 PG 8 WC Computer Science, Cybernetics; Engineering, Industrial; Engineering, Manufacturing; Engineering, Electrical & Electronic; Statistics & Probability SC Computer Science; Engineering; Mathematics GA BH19F UT WOS:A1996BH19F00020 ER PT B AU Buss, AH Stork, KA AF Buss, AH Stork, KA BE Charnes, JM Morrice, DJ Brunner, DT Swain, JJ TI Discrete event simulation on the world wide web using Java SO 1996 WINTER SIMULATION CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1996 Winter Simulation Conference (WSC 96) CY DEC 08-11, 1996 CL CORONADO, CA SP Amer Stat Assoc, Assoc Comp Machinery, SIGSIM, Inst Operat Res & Management Sci, Inst Operat Res & Management Sci, Coll Simulat, IEEE Comp Soc, IEEE Syst Man & Cybernet Soc, Inst Ind Engineers, NIST, Soc Comp Simulat Int AB This paper introduces Simkit, a small set of Java classes for creating discrete event simulation models. Simkit may be used to either implement stand-alone models or Web page applets. Exploiting network capabilities of Java, the lingua franca of the World Wide Web (WWW), Simkit models can easily be implemented as applets and executed in a Web browser. Java's graphical capabilities enable the rapid development of intuitive user interfaces. Java's use of interpreted bytecodes, while imposing a performance penalty, enable development of platform-independent models. The language's inherent internet-awareness make other possibilities, such as distributed simulation, much easier to implement. RP Buss, AH (reprint author), USN,POSTGRAD SCH,DEPT OPERAT RES,CODE OR-BU,MONTEREY,CA 93943, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3383-7 PY 1996 BP 780 EP 785 PG 6 WC Computer Science, Cybernetics; Engineering, Industrial; Engineering, Manufacturing; Engineering, Electrical & Electronic; Statistics & Probability SC Computer Science; Engineering; Mathematics GA BH19F UT WOS:A1996BH19F00112 ER PT B AU Blood, CG ODonnell, E Rotblatt, D AF Blood, CG ODonnell, E Rotblatt, D BE Charnes, JM Morrice, DJ Brunner, DT Swain, JJ TI A system to project injury and illness incidence during military operations SO 1996 WINTER SIMULATION CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1996 Winter Simulation Conference (WSC 96) CY DEC 08-11, 1996 CL CORONADO, CA SP Amer Stat Assoc, Assoc Comp Machinery, SIGSIM, Inst Operat Res & Management Sci, Inst Operat Res & Management Sci, Coll Simulat, IEEE Comp Soc, IEEE Syst Man & Cybernet Soc, Inst Ind Engineers, NIST, Soc Comp Simulat Int AB Modeling of medical resource requirements during military operations requires projections of disease and non-battle injury (DNBI) and wounded-in-action (WIA) rates. Historical data were extracted from unit diaries of infantry and support troop deployed during four previous combat engagements. A planning tool (FORECAS) was developed that uses the statistical distributions of DNBI and WIA incidence from previous operations to simulate injury and illness arrival rates for future scenarios. Output of the simulated data reflects the nuances of the empirical data. RP Blood, CG (reprint author), USN,HLTH RES CTR,OPERAT RES DIV,POB 85122,SAN DIEGO,CA 92186, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3383-7 PY 1996 BP 903 EP 906 PG 4 WC Computer Science, Cybernetics; Engineering, Industrial; Engineering, Manufacturing; Engineering, Electrical & Electronic; Statistics & Probability SC Computer Science; Engineering; Mathematics GA BH19F UT WOS:A1996BH19F00129 ER PT B AU Sundstrom, SC Blood, CG Matheny, SA AF Sundstrom, SC Blood, CG Matheny, SA BE Charnes, JM Morrice, DJ Brunner, DT Swain, JJ TI The optimal placement of casualty evacuation assets: A linear programming model SO 1996 WINTER SIMULATION CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1996 Winter Simulation Conference (WSC 96) CY DEC 08-11, 1996 CL CORONADO, CA SP Amer Stat Assoc, Assoc Comp Machinery, SIGSIM, Inst Operat Res & Management Sci, Inst Operat Res & Management Sci, Coll Simulat, IEEE Comp Soc, IEEE Syst Man & Cybernet Soc, Inst Ind Engineers, NIST, Soc Comp Simulat Int AB Through the use of linear programming techniques, the optimal number and positioning of patient evacuation assets within a theater of operations may be determined to ensure the orderly transport of casualties from the front lines to third echelon medical treatment facilities. The Probabilistic Location Set Covering Problem has been chosen as the core module for a linear programming model to assist in these determinations. The Optimal Placement of Casualty Evacuation Assets (OPTEVAC) model prompts the user to enter the dimensions of the theater, troop deployment nodes, types of evacuation assets available, and preferred locations of medical treatment facilities. The OPTEVAC model then provides output as to the required numbers of ground and air ambulances as well as the optimal positioning of those evacuation assets and ambulance exchange points. RP Sundstrom, SC (reprint author), USN,HLTH RES CTR,MED INFORMAT SYST & OPERAT RES DEPT,POB 85122,SAN DIEGO,CA 92186, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3383-7 PY 1996 BP 907 EP 911 PG 5 WC Computer Science, Cybernetics; Engineering, Industrial; Engineering, Manufacturing; Engineering, Electrical & Electronic; Statistics & Probability SC Computer Science; Engineering; Mathematics GA BH19F UT WOS:A1996BH19F00130 ER PT B AU Blood, CG Odowick, MS Marks, JS AF Blood, CG Odowick, MS Marks, JS BE Charnes, JM Morrice, DJ Brunner, DT Swain, JJ TI Simulation of casualty sustainment during naval combat operations SO 1996 WINTER SIMULATION CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1996 Winter Simulation Conference (WSC 96) CY DEC 08-11, 1996 CL CORONADO, CA SP Amer Stat Assoc, Assoc Comp Machinery, SIGSIM, Inst Operat Res & Management Sci, Inst Operat Res & Management Sci, Coll Simulat, IEEE Comp Soc, IEEE Syst Man & Cybernet Soc, Inst Ind Engineers, NIST, Soc Comp Simulat Int AB Accurate forecasts of the casualties likely to be sustained during naval warfare allow sufficient resources to be programmed to meet the medical demands of the operation while at the same time minimizing resource overallocation. A simulation tool called the shipboard casualty projection system (SHIPCAS) has recently been developed to assist planners in medical resource programming. SHIPCAS is a forecasting tool that projects WIA (wounded-in-action), KIA (killed-in-action), and DP TBI (disease and nora-battle injuries) incidence among naval surface forces. By simulating ship strikes during naval operations, SHIPCAS provides medical planners with the injury and illness estimates required to assist in determining the needed medical resources. The SHIPCAS system models casualties afloat by allowing the user to define a specific scenario in terms of task force composition, expected battle intensity, and length of operation. The model then produces graphical and tabular information detailing the total number of casualties across the operation, the daily average number of casualties, the maximum daily number of casualties, and the casualty sates per 1000 strength per day. In addition to projecting the number of ships hit and the resulting casualties, SHIPCAS also provides estimates of the temporal points in the operation during which ship strikes are most likely. RP Blood, CG (reprint author), USN,HLTH RES CTR,OPERAT RES DIV,POB 85122,SAN DIEGO,CA 92186, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3383-7 PY 1996 BP 912 EP 917 PG 6 WC Computer Science, Cybernetics; Engineering, Industrial; Engineering, Manufacturing; Engineering, Electrical & Electronic; Statistics & Probability SC Computer Science; Engineering; Mathematics GA BH19F UT WOS:A1996BH19F00131 ER PT B AU Opeka, MM Rapp, RA Wuttig, M AF Opeka, MM Rapp, RA Wuttig, M GP NASA TI The oxidation of refractory elements and compounds in an atomic oxygen environment SO 19TH SPACE SIMULATION CONFERENCE: COST EFFECTIVE TESTING FOR THE 21ST CENTURY SE NASA CONFERENCE PUBLICATION LA English DT Proceedings Paper CT 19th Space Simulation Conference - Cost Effective Testing for the 21st-Century CY OCT 28-31, 1996 CL BALTIMORE, MD SP NASA, Inst Environm Sci, Amer Inst Aeronaut & Astron, Amer Soc Testing & Mat, Canadian Space Agcy AB An analytical methodology was developed to predict the behavior of elements and compounds in atomic oxygen (AO) environments. Thermodynamic condensed and vapor phase equilibria were calculated in order to compare the responses to AO and to O-2 of a broad range of materials. The materials included Cu, Ag, Au, Pd, Pt, Rh, Ir, Ru, Os, Re, Cr, Mo, W, Al, Si, Be, C, B, Ti, TiC, TiN, and TiB2. An experimental apparatus was constructed in order to evaluate the AO-oxidation behavior of selected materials. AO was produced by an N-2 dissociation/NO titration technique to yield thermal AO. AO-response experiments at a P-0 (O-atom pressure) of 10(-5) atm (1 atm = 101.3 kPa) and at temperatures of up to 675 K were conducted with Au, Ru, Ti, TiC, and TiB2. The condensed phase equilibria calculations indicated that four metals - Ag, Au, Ru, and Cr - form different condensed oxides in AO (P-0 = 10(-7) atm) than in air at 300 K, suggesting that oxidation rates will differ. The vapor phase equilibria calculations indicated that seven metals - Os, Ru, Ir, Pt, Re, Cr, and Mo - may exhibit significant vaporization rates in AO (P-0 = 10(-7) atm) at low temperatures (300 K to 1000 K, depending on the metal). Using a vaporization model which includes O-atom supply limitations, the predicted vaporization rates for Os, Zr, Re, and Cr correlate well with published measurements. Experimentally, Au and Ru did not oxidize according to AO-based thermodynamics. The results suggest that high O-to-O-2 recombination coefficients for these metals significantly decreased P-0 at the surface. TiC exhibited logarithmic kinetics in AO at 675 K, in qualitative agreement with published O-2 oxidation results for Ti and TiC. The thermodynamic prediction methodology developed in this research provides the first systematic framework to understand and predict the response of elements and compounds to AO. It has been found to be a powerful tool for understanding AO-oxidation behavior and for predicting the temperature dependence of vaporization rates. RP Opeka, MM (reprint author), USN,CTR SURFACE WARFARE,DAHLGREN DIV,DAHLGREN,VA 22448, USA. NR 0 TC 0 Z9 0 U1 1 U2 2 PU NASA PI WASHINGTON PA WASHINGTON, DC 20546 J9 NASA CONF P PY 1996 VL 3341 BP 269 EP 285 PG 17 WC Engineering, Aerospace SC Engineering GA BG87U UT WOS:A1996BG87U00029 ER PT B AU Esman, R AF Esman, R GP TELENOR TI Fiber optics for microwave applications SO 22ND EUROPEAN CONFERENCE ON OPTICAL COMMUNICATIONS, PROCEEDINGS, VOLS 1-6: CO-LOCATED WITH: 2ND EUROPEAN EXHIBITION ON OPTICAL COMMUNICATION - EEOC '96 LA English DT Proceedings Paper CT 22nd European Conference on Optical Communication (ECOC 96) CY SEP 15-19, 1996 CL OSLO, NORWAY SP Telenor, ABB, ALCATEL STK, ERICSSON AS, Norwegian Univ Sci & Technol, OPTOPLAN, SIEMENS AS, European Opt Soc, Convent Natl Soc Elect Engineers W Europe, IEEE, Lasers & Electro Opt Soc, Opt Soc Amer, Norske Sivilingeniorers Forening RP Esman, R (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU TELENOR R&D PI N-2007 KJELLER PA INSTITUTTVEIEN 23 PO BOX 83, N-2007 KJELLER, NORWAY BN 82-423-0418-1 PY 1996 BP F97 EP + PG 38 WC Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA BH14G UT WOS:A1996BH14G00239 ER PT B AU Hubler, GK AF Hubler, GK BE Singh, J Copley, SM Mazumder, J TI Prospects for high value materials by energetic deposition SO 2ND INTERNATIONAL CONFERENCE ON BEAM PROCESSING OF ADVANCED MATERIALS, CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 2nd International Conference on Beam Processing of Advanced Materials CY OCT 30-NOV 02, 1995 CL CLEVELAND, OH SP ASM MSD, Synthesis & Proc Comm, Amer Welding Soc C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-563-X PY 1996 BP 7 EP 12 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA BG22D UT WOS:A1996BG22D00002 ER PT B AU Metzbower, EA AF Metzbower, EA BE Singh, J Copley, SM Mazumder, J TI Keyhole formation and temperatures SO 2ND INTERNATIONAL CONFERENCE ON BEAM PROCESSING OF ADVANCED MATERIALS, CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 2nd International Conference on Beam Processing of Advanced Materials CY OCT 30-NOV 02, 1995 CL CLEVELAND, OH SP ASM MSD, Synthesis & Proc Comm, Amer Welding Soc C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-563-X PY 1996 BP 145 EP 159 PG 15 WC Materials Science, Multidisciplinary SC Materials Science GA BG22D UT WOS:A1996BG22D00014 ER PT B AU Focht, EM AF Focht, EM GP IRON & STEEL SOC TI Static recrystallization behavior of austenite in HSLA-100 during thermomechanical processing SO 37TH MECHANICAL WORKING AND STEEL PROCESSING CONFERENCE PROCEEDINGS SE IRON & STEEL SOCIETY: MECHANICAL WORKING AND STEEL PROCESSING CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 37th Mechanical Working and Steel Processing Conference/International Symposium on Recovery and Recrystallization in Steel CY OCT 22-25, 1995 CL HAMILTON, CANADA SP Iron & Steel Soc C1 USN,CTR SURFACE WARFARE,CARDEROCK DIV,ANNAPOLIS,MD 21402. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IRON & STEEL SOC AIME PI WARRENDALE PA 410 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 1-886362-05-X J9 ISS MWSP CONF P PY 1996 VL 33 BP 791 EP 804 PG 14 WC Engineering, Manufacturing SC Engineering GA BF11E UT WOS:A1996BF11E00090 ER PT B AU Michael, S AF Michael, S BE Caloba, LP Diniz, PSR deQueiroz, ACM Watanabe, EH TI Results of the VLSI implementation of high performance switched-capacitor analog building blocks SO 38TH MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS, PROCEEDINGS, VOLS 1 AND 2 LA English DT Proceedings Paper CT 38th Midwest Symposium on Circuits and Systems CY AUG 13-16, 1995 CL RIO JANEIRO, BRAZIL SP Fed Univ Rio de Janeiro, IEEE, Circuits & Syst Soc C1 USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2973-2 PY 1996 BP 182 EP 185 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BF75Z UT WOS:A1996BF75Z00045 ER PT B AU Cristi, R Kutlu, M AF Cristi, R Kutlu, M BE Caloba, LP Diniz, PSR deQueiroz, ACM Watanabe, EH TI Blind equalization of encoded sequences by hybrid Markov models SO 38TH MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS, PROCEEDINGS, VOLS 1 AND 2 LA English DT Proceedings Paper CT 38th Midwest Symposium on Circuits and Systems CY AUG 13-16, 1995 CL RIO JANEIRO, BRAZIL SP Fed Univ Rio de Janeiro, IEEE, Circuits & Syst Soc C1 USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2973-2 PY 1996 BP 815 EP 818 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BF75Z UT WOS:A1996BF75Z00201 ER PT B AU Lake, DE AF Lake, DE GP IEEE TI Detecting regularity in minefields and chaotic signals using the empty boxes test SO 8TH IEEE SIGNAL PROCESSING WORKSHOP ON STATISTICAL SIGNAL AND ARRAY PROCESSING, PROCEEDINGS LA English DT Proceedings Paper CT 8th IEEE Signal Processing Workshop on Statistical Signal and Array Processing (SSAP) CY JUN 24-26, 1996 CL CORFU, GREECE SP IEEE, Signal Proc Soc, USA, Res Off, USN, Off Naval Res C1 OFF NAVAL RES,ARLINGTON,VA 22217. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-7576-4 PY 1996 BP 4 EP 7 DI 10.1109/SSAP.1996.534806 PG 4 WC Computer Science, Information Systems; Engineering, Electrical & Electronic; Telecommunications SC Computer Science; Engineering; Telecommunications GA BF94C UT WOS:A1996BF94C00001 ER PT B AU Kirsteins, IP Nikitakos, NV AF Kirsteins, IP Nikitakos, NV GP IEEE TI A generalized likelihood ratio test detector for moving targets in clutter SO 8TH IEEE SIGNAL PROCESSING WORKSHOP ON STATISTICAL SIGNAL AND ARRAY PROCESSING, PROCEEDINGS LA English DT Proceedings Paper CT 8th IEEE Signal Processing Workshop on Statistical Signal and Array Processing (SSAP) CY JUN 24-26, 1996 CL CORFU, GREECE SP IEEE, Signal Proc Soc, USA, Res Off, USN, Off Naval Res C1 USN,UNDERSEA WARFARE CTR,NEW LONDON,CT 06320. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-7576-4 PY 1996 BP 16 EP 19 DI 10.1109/SSAP.1996.534809 PG 4 WC Computer Science, Information Systems; Engineering, Electrical & Electronic; Telecommunications SC Computer Science; Engineering; Telecommunications GA BF94C UT WOS:A1996BF94C00004 ER PT B AU Broadhead, MK Pflug, LA Field, RL AF Broadhead, MK Pflug, LA Field, RL GP IEEE TI Minimum entropy filtering for improving nonstationary sonar signal classification SO 8TH IEEE SIGNAL PROCESSING WORKSHOP ON STATISTICAL SIGNAL AND ARRAY PROCESSING, PROCEEDINGS LA English DT Proceedings Paper CT 8th IEEE Signal Processing Workshop on Statistical Signal and Array Processing (SSAP) CY JUN 24-26, 1996 CL CORFU, GREECE SP IEEE, Signal Proc Soc, USA, Res Off, USN, Off Naval Res C1 USN,RES LAB,BAY ST LOUIS,MS 39529. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-7576-4 PY 1996 BP 222 EP 225 DI 10.1109/SSAP.1996.534858 PG 4 WC Computer Science, Information Systems; Engineering, Electrical & Electronic; Telecommunications SC Computer Science; Engineering; Telecommunications GA BF94C UT WOS:A1996BF94C00053 ER PT B AU Pflug, LA Jackson, PM Ioup, JW Ioup, GE AF Pflug, LA Jackson, PM Ioup, JW Ioup, GE GP IEEE TI Moment analysis of ambient noise dominated by local shipping SO 8TH IEEE SIGNAL PROCESSING WORKSHOP ON STATISTICAL SIGNAL AND ARRAY PROCESSING, PROCEEDINGS LA English DT Proceedings Paper CT 8th IEEE Signal Processing Workshop on Statistical Signal and Array Processing (SSAP) CY JUN 24-26, 1996 CL CORFU, GREECE SP IEEE, Signal Proc Soc, USA, Res Off, USN, Off Naval Res C1 USN,RES LAB,BAY ST LOUIS,MS 39529. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-7576-4 PY 1996 BP 271 EP 274 DI 10.1109/SSAP.1996.534869 PG 4 WC Computer Science, Information Systems; Engineering, Electrical & Electronic; Telecommunications SC Computer Science; Engineering; Telecommunications GA BF94C UT WOS:A1996BF94C00064 ER PT B AU Lake, DE AF Lake, DE GP IEEE TI Detection of affine time-delay multipath striations using a generalized cyclostationary model SO 8TH IEEE SIGNAL PROCESSING WORKSHOP ON STATISTICAL SIGNAL AND ARRAY PROCESSING, PROCEEDINGS LA English DT Proceedings Paper CT 8th IEEE Signal Processing Workshop on Statistical Signal and Array Processing (SSAP) CY JUN 24-26, 1996 CL CORFU, GREECE SP IEEE, Signal Proc Soc, USA, Res Off, USN, Off Naval Res C1 OFF NAVAL RES,ARLINGTON,VA 22217. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-7576-4 PY 1996 BP 424 EP 427 DI 10.1109/SSAP.1996.534906 PG 4 WC Computer Science, Information Systems; Engineering, Electrical & Electronic; Telecommunications SC Computer Science; Engineering; Telecommunications GA BF94C UT WOS:A1996BF94C00101 ER PT S AU Meadows, C AF Meadows, C GP IEEE TI Language generation and verification in the NRL protocol analyzer SO 9TH IEEE COMPUTER SECURITY FOUNDATIONS WORKSHOP, PROCEEDINGS SE PROCEEDINGS - IEEE COMPUTER SECURITY FOUNDATIONS WORKSHOP LA English DT Proceedings Paper CT 9th IEEE Computer Security Foundations Workshop CY JUN 10-12, 1996 CL KENMARE, IRELAND SP IEEE, Comp Soc, Tech Comm Secur & Privacy C1 USN,RES LAB,CTR HIGH ASSURANCE COMP SYST,WASHINGTON,DC 20375. NR 0 TC 10 Z9 10 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-6900 BN 0-8186-7522-5 J9 P IEEE CSFW PY 1996 BP 48 EP 61 DI 10.1109/CSFW.1996.503690 PG 14 WC Computer Science, Theory & Methods SC Computer Science GA BF90C UT WOS:A1996BF90C00006 ER PT S AU McDermott, J Goldschlag, D AF McDermott, J Goldschlag, D GP IEEE TI Towards a model of storage jamming SO 9TH IEEE COMPUTER SECURITY FOUNDATIONS WORKSHOP, PROCEEDINGS SE PROCEEDINGS - IEEE COMPUTER SECURITY FOUNDATIONS WORKSHOP LA English DT Proceedings Paper CT 9th IEEE Computer Security Foundations Workshop CY JUN 10-12, 1996 CL KENMARE, IRELAND SP IEEE, Comp Soc, Tech Comm Secur & Privacy C1 USN,RES LAB,CTR HIGH ASSURANCE COMP SYST,WASHINGTON,DC 20375. NR 0 TC 19 Z9 22 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-6900 BN 0-8186-7522-5 J9 P IEEE CSFW PY 1996 BP 176 EP 185 DI 10.1109/CSFW.1996.503703 PG 10 WC Computer Science, Theory & Methods SC Computer Science GA BF90C UT WOS:A1996BF90C00019 ER PT S AU Syverson, P AF Syverson, P GP IEEE TI Panel: What is an attack on a cryptographic protocol? SO 9TH IEEE COMPUTER SECURITY FOUNDATIONS WORKSHOP, PROCEEDINGS SE PROCEEDINGS - IEEE COMPUTER SECURITY FOUNDATIONS WORKSHOP LA English DT Proceedings Paper CT 9th IEEE Computer Security Foundations Workshop CY JUN 10-12, 1996 CL KENMARE, IRELAND SP IEEE, Comp Soc, Tech Comm Secur & Privacy C1 USN,RES LAB,CTR HIGH ASSURANCE COMP SYST,WASHINGTON,DC 20375. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-6900 BN 0-8186-7522-5 J9 P IEEE CSFW PY 1996 BP 188 EP 188 DI 10.1109/CSFW.1996.503704 PG 1 WC Computer Science, Theory & Methods SC Computer Science GA BF90C UT WOS:A1996BF90C00020 ER PT J AU Knoop, KJ Dillon, EC AF Knoop, KJ Dillon, EC TI Clinical pearls - Pediatric vomiting - Vomiting. SO ACADEMIC EMERGENCY MEDICINE LA English DT Article DE vomiting; pyloric stenosis; pediatrics; infant; abdominal ID HYPERTROPHIC PYLORIC-STENOSIS C1 NAVAL HOSP,MED CTR,EMERGENCY MED RESIDENCY,PORTSMOUTH,VA. SOUTHSIDE REG MED CTR,PETERSBURG,VA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU HANLEY & BELFUS INC PI PHILADELPHIA PA 210 S 13TH ST, PHILADELPHIA, PA 19107 SN 1069-6563 J9 ACAD EMERG MED JI Acad. Emerg. Med. PD JAN PY 1996 VL 3 IS 1 BP 77 EP & DI 10.1111/j.1553-2712.1996.tb03308.x PG 5 WC Emergency Medicine SC Emergency Medicine GA TL615 UT WOS:A1996TL61500017 PM 8749973 ER PT S AU Moffett, MB Powers, JM AF Moffett, MB Powers, JM BE Berliner, MJ Lindberg, JF TI A bimorph flexural-disk accelerometer for underwater use SO ACOUSTIC PARTICLE VELOCITY SENSORS: DESIGN, PERFORMANCE, AND APPLICATIONS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Workshop on Acoustic Particle Velocity Sensors - Design, Performance, and Applications CY SEP, 1995 CL MYSTIC, CT SP Naval Undersea Warfare Ctr Div Newport, USN, Off Naval Res, Acoust Soc Amer C1 USN,UNDERSEA WARFARE CTR,NEW LONDON,CT 06320. NR 0 TC 1 Z9 1 U1 0 U2 1 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-549-6 J9 AIP CONF PROC PY 1996 IS 368 BP 69 EP 83 PG 15 WC Acoustics; Instruments & Instrumentation SC Acoustics; Instruments & Instrumentation GA BF36A UT WOS:A1996BF36A00005 ER PT S AU Kant, RA Nagel, DJ AF Kant, RA Nagel, DJ BE Berliner, MJ Lindberg, JF TI Characteristics and performance of MEMS accelerometers SO ACOUSTIC PARTICLE VELOCITY SENSORS: DESIGN, PERFORMANCE, AND APPLICATIONS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Workshop on Acoustic Particle Velocity Sensors - Design, Performance, and Applications CY SEP, 1995 CL MYSTIC, CT SP Naval Undersea Warfare Ctr Div Newport, USN, Off Naval Res, Acoust Soc Amer C1 USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,WASHINGTON,DC 20375. NR 0 TC 2 Z9 2 U1 0 U2 1 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-549-6 J9 AIP CONF PROC PY 1996 IS 368 BP 166 EP 176 PG 11 WC Acoustics; Instruments & Instrumentation SC Acoustics; Instruments & Instrumentation GA BF36A UT WOS:A1996BF36A00010 ER PT S AU Cray, BA Christman, RA AF Cray, BA Christman, RA BE Berliner, MJ Lindberg, JF TI Acoustic and vibration performance evaluations of a velocity sensing hull array SO ACOUSTIC PARTICLE VELOCITY SENSORS: DESIGN, PERFORMANCE, AND APPLICATIONS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Workshop on Acoustic Particle Velocity Sensors - Design, Performance, and Applications CY SEP, 1995 CL MYSTIC, CT SP Naval Undersea Warfare Ctr Div Newport, USN, Off Naval Res, Acoust Soc Amer C1 USN,UNDERSEA WARFARE CTR DIV,DETACHMENT NEW LONDON,NEW LONDON,CT 06320. NR 0 TC 2 Z9 2 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-549-6 J9 AIP CONF PROC PY 1996 IS 368 BP 177 EP 188 PG 12 WC Acoustics; Instruments & Instrumentation SC Acoustics; Instruments & Instrumentation GA BF36A UT WOS:A1996BF36A00011 ER PT S AU Abraham, BM AF Abraham, BM BE Berliner, MJ Lindberg, JF TI Low-cost dipole hydrophone for use in towed arrays SO ACOUSTIC PARTICLE VELOCITY SENSORS: DESIGN, PERFORMANCE, AND APPLICATIONS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Workshop on Acoustic Particle Velocity Sensors - Design, Performance, and Applications CY SEP, 1995 CL MYSTIC, CT SP Naval Undersea Warfare Ctr Div Newport, USN, Off Naval Res, Acoust Soc Amer C1 USN,UNDERSEA WARFARE CTR DIV NEWPORT,SUBMARINE SONAR DEPT,DETACHMENT NEW LONDON,NEW LONDON,CT 06320. NR 0 TC 6 Z9 6 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-549-6 J9 AIP CONF PROC PY 1996 IS 368 BP 189 EP 201 PG 13 WC Acoustics; Instruments & Instrumentation SC Acoustics; Instruments & Instrumentation GA BF36A UT WOS:A1996BF36A00012 ER PT S AU Bucaro, JA Lagakos, N Houston, BH Kraus, L AF Bucaro, JA Lagakos, N Houston, BH Kraus, L BE Berliner, MJ Lindberg, JF TI Large area planar fiber optic accelerometers for measurement of acoustic velocity SO ACOUSTIC PARTICLE VELOCITY SENSORS: DESIGN, PERFORMANCE, AND APPLICATIONS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Workshop on Acoustic Particle Velocity Sensors - Design, Performance, and Applications CY SEP, 1995 CL MYSTIC, CT SP Naval Undersea Warfare Ctr Div Newport, USN, Off Naval Res, Acoust Soc Amer C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-549-6 J9 AIP CONF PROC PY 1996 IS 368 BP 274 EP 284 PG 11 WC Acoustics; Instruments & Instrumentation SC Acoustics; Instruments & Instrumentation GA BF36A UT WOS:A1996BF36A00017 ER PT S AU Vohra, ST Danver, B Tveten, A Dandridge, A AF Vohra, ST Danver, B Tveten, A Dandridge, A BE Berliner, MJ Lindberg, JF TI Fiber optic interferometric accelerometers SO ACOUSTIC PARTICLE VELOCITY SENSORS: DESIGN, PERFORMANCE, AND APPLICATIONS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Workshop on Acoustic Particle Velocity Sensors - Design, Performance, and Applications CY SEP, 1995 CL MYSTIC, CT SP Naval Undersea Warfare Ctr Div Newport, USN, Off Naval Res, Acoust Soc Amer C1 USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375. NR 0 TC 5 Z9 5 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-549-6 J9 AIP CONF PROC PY 1996 IS 368 BP 285 EP 293 PG 9 WC Acoustics; Instruments & Instrumentation SC Acoustics; Instruments & Instrumentation GA BF36A UT WOS:A1996BF36A00018 ER PT S AU Corsaro, RD Houston, B AF Corsaro, RD Houston, B BE Berliner, MJ Lindberg, JF TI Acoustic velocity sensor for the NRL ABC research platform SO ACOUSTIC PARTICLE VELOCITY SENSORS: DESIGN, PERFORMANCE, AND APPLICATIONS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Workshop on Acoustic Particle Velocity Sensors - Design, Performance, and Applications CY SEP, 1995 CL MYSTIC, CT SP Naval Undersea Warfare Ctr Div Newport, USN, Off Naval Res, Acoust Soc Amer C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-549-6 J9 AIP CONF PROC PY 1996 IS 368 BP 303 EP 311 PG 9 WC Acoustics; Instruments & Instrumentation SC Acoustics; Instruments & Instrumentation GA BF36A UT WOS:A1996BF36A00020 ER PT S AU Corsaro, RD Klunder, JD Gentilman, R Fiore, D AF Corsaro, RD Klunder, JD Gentilman, R Fiore, D BE Berliner, MJ Lindberg, JF TI Co-formed accelerometer array for integrated sensor actuator applications SO ACOUSTIC PARTICLE VELOCITY SENSORS: DESIGN, PERFORMANCE, AND APPLICATIONS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Workshop on Acoustic Particle Velocity Sensors - Design, Performance, and Applications CY SEP, 1995 CL MYSTIC, CT SP Naval Undersea Warfare Ctr Div Newport, USN, Off Naval Res, Acoust Soc Amer C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-549-6 J9 AIP CONF PROC PY 1996 IS 368 BP 320 EP 327 PG 8 WC Acoustics; Instruments & Instrumentation SC Acoustics; Instruments & Instrumentation GA BF36A UT WOS:A1996BF36A00022 ER PT S AU Ko, SH AF Ko, SH BE Berliner, MJ Lindberg, JF TI Performance of velocity sensor for flexural wave reduction SO ACOUSTIC PARTICLE VELOCITY SENSORS: DESIGN, PERFORMANCE, AND APPLICATIONS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Workshop on Acoustic Particle Velocity Sensors - Design, Performance, and Applications CY SEP, 1995 CL MYSTIC, CT SP Naval Undersea Warfare Ctr Div Newport, USN, Off Naval Res, Acoust Soc Amer C1 USN,UNDERSEA WARFARE CTR DETACHMENT,NEW LONDON,CT 06320. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-549-6 J9 AIP CONF PROC PY 1996 IS 368 BP 374 EP 389 PG 16 WC Acoustics; Instruments & Instrumentation SC Acoustics; Instruments & Instrumentation GA BF36A UT WOS:A1996BF36A00027 ER PT B AU Powers, JP Baylosis, B Gatchell, P Reid, W AF Powers, JP Baylosis, B Gatchell, P Reid, W BE Tortoli, P Masotti, L TI Experimental comparison of measured ultrasound pressure fields with theoretical prediction SO ACOUSTICAL IMAGING, VOL 22 SE ACOUSTICAL IMAGING LA English DT Proceedings Paper CT 22nd International Symposium on Acoustical Imaging CY SEP 03-07, 1995 CL FLORENCE, ITALY SP Univ Florence, CNR, Area Ric, CESVIT, Reg Toscana, Reg EsaOte Biomed C1 USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-45364-9 J9 ACOUST IMAG PY 1996 VL 22 BP 51 EP 56 PG 6 WC Acoustics; Engineering, Multidisciplinary; Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging SC Acoustics; Engineering; Radiology, Nuclear Medicine & Medical Imaging GA BF85N UT WOS:A1996BF85N00008 ER PT B AU Sullivan, RG AF Sullivan, RG BE Masten, MK Stockum, LA TI A parametric study analyzing the impact of space-based sensors on Navy Theater Ballistic Missile Defense performance for Theater-Wide Systems SO ACQUISITION, TRACKING, AND POINTING X SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Acquisition, Tracking, and Pointing X Conference CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 USN,CTR SURFACE WARFARE,SYST ENGN & ANAL BRANCH,DAHLGREN,VA 22448. NR 0 TC 0 Z9 0 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2120-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2739 BP 2 EP 18 DI 10.1117/12.241906 PG 17 WC Engineering, Aerospace; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BF87E UT WOS:A1996BF87E00001 ER PT B AU Conte, JE Groves, GW Blair, WD AF Conte, JE Groves, GW Blair, WD BE Masten, MK Stockum, LA TI Low elevation monopulse radar and tracking simulator (LEMRATS) SO ACQUISITION, TRACKING, AND POINTING X SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Acquisition, Tracking, and Pointing X Conference CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE simulation; low-elevation; monopulse; multipath; tracking; radar C1 USN,CTR SURFACE WARFARE,DAHLGREN DIV,SYST RES & DEV DEPT,DAHLGREN,VA 22485. NR 0 TC 0 Z9 0 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2120-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2739 BP 133 EP 144 DI 10.1117/12.241910 PG 12 WC Engineering, Aerospace; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BF87E UT WOS:A1996BF87E00012 ER PT B AU Blair, WD BrandtPearce, M AF Blair, WD BrandtPearce, M BE Masten, MK Stockum, LA TI Radar waveform requirements for reliable detection of an aircraft-launched missile SO ACQUISITION, TRACKING, AND POINTING X SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Acquisition, Tracking, and Pointing X Conference CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE radar signal processing; target tracking; detection C1 USN,CTR SURFACE WARFARE,SYST RES & TECHNOL DEPT,DAHLGREN DIV,DAHLGREN,VA 22448. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2120-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2739 BP 145 EP 155 DI 10.1117/12.241911 PG 11 WC Engineering, Aerospace; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BF87E UT WOS:A1996BF87E00013 ER PT B AU Rice, TR Conte, JE AF Rice, TR Conte, JE BE Masten, MK Stockum, LA TI Adaptive CFAR techniques for signal detection in the Doppler domain SO ACQUISITION, TRACKING, AND POINTING X SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Acquisition, Tracking, and Pointing X Conference CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE CFAR; Central Limit Theorem; threshold C1 USN,CTR SURFACE WARFARE,SYST RES & DEV DEPT,DAHLGREN DIV,DAHLGREN,VA 22448. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2120-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2739 BP 156 EP 167 DI 10.1117/12.241912 PG 12 WC Engineering, Aerospace; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BF87E UT WOS:A1996BF87E00014 ER PT B AU Helmick, RE Conte, JE Rice, TR AF Helmick, RE Conte, JE Rice, TR BE Masten, MK Stockum, LA TI Absolute sensor alignment using GPS SO ACQUISITION, TRACKING, AND POINTING X SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Acquisition, Tracking, and Pointing X Conference CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE sensor alignment; Global Positioning System (GPS) C1 USN,CTR SURFACE WARFARE,DAHLGREN DIV,SYST RES & TECHNOL DEPT,DAHLGREN,VA 22448. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2120-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2739 BP 168 EP 179 DI 10.1117/12.241913 PG 12 WC Engineering, Aerospace; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BF87E UT WOS:A1996BF87E00015 ER PT B AU Williams, E Caulfield, J AF Williams, E Caulfield, J BE Masten, MK Stockum, LA TI System architecture for a long range over the water target acquisition and tracking system SO ACQUISITION, TRACKING, AND POINTING X SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Acquisition, Tracking, and Pointing X Conference CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE IR tracking system; digital signal processor; acquisition; IRFPA; field of regard; field of view; instantaneous field of view; spectral bands; SPEC95; RAID C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2120-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2739 BP 278 EP 289 DI 10.1117/12.241923 PG 12 WC Engineering, Aerospace; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BF87E UT WOS:A1996BF87E00026 ER PT J AU Olech, A Semeniuk, I Kwast, T Pych, W DeYoung, JA Schmidt, RE Nalezyty, M AF Olech, A Semeniuk, I Kwast, T Pych, W DeYoung, JA Schmidt, RE Nalezyty, M TI CCD photometry of nova V1974 Cygni in 1995 SO ACTA ASTRONOMICA LA English DT Article DE stars, individual, V1974 Cyg; binaries, close; novae, cataclysmic variables ID SPACED DATA AB We report on analysis of I CCD photometry of Nova V1974 Cygni from the observational season 1995. The analysis shows that both short-term modulations with periods 0.0813 and 0.085 days (whose values are close to 2-day aliases of one another) are still present in the light curve of Nova V1974 Cygni. Contrary to the 1994 situation the amplitude of the 0.085-day modulation in 1995, was, on the average, smaller than the amplitude of the 0.0813-day modulation. The observations give evidence that the 0.0813-day period, interpreted as the orbital period of the system, decreased during the time interval 1993-1995. The 0.085-day period, observed as decreasing in 1994, stopped decreasing and seems to increase since the middle of 1995. The light curve of V1974 Cygni observed during some nights at the end of the 1995 season resembles the light curve of a polar with two sets of minima. C1 USN,OBSERV TIME SERV DEPT,WASHINGTON,DC 20392. RP Olech, A (reprint author), UNIV WARSAW OBSERV,AL UJAZDOWSKIE 4,PL-00478 WARSAW,POLAND. NR 15 TC 5 Z9 5 U1 0 U2 0 PU COPERNICUS FOUNDATION POLISH ASTRONOMY PI WARSAW PA AL UJAZDOWSKIE 4, 00-478 WARSAW, POLAND SN 0001-5237 J9 ACTA ASTRONOM JI Acta Astron. PY 1996 VL 46 IS 3 BP 311 EP 323 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA VL574 UT WOS:A1996VL57400003 ER PT B AU Schwartz, C Keyes, C vanBronkhorst, E AF Schwartz, C Keyes, C vanBronkhorst, E BE Caulfield, HJ Chen, SS TI Application and evaluation of Genetic Programming for aimpoint selection SO ADAPTIVE COMPUTING: MATHEMATICAL AND PHYSICAL METHODS FOR COMPLEX ENVIRONMENTS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Adaptive Computing - Mathematical and Physical Methods for Complex Environments CY AUG 04-05, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE genetic programming; artificial intelligence; machine learning; optimization AB We report on the application of Genetic Programming to the determination of a desired output vector from an input vector. Genetic Programming is an emerging technique similar in spirit to Genetic Algorithms which employ a metric to drive a parallel search of the solution space. In contrast to genetic algorithms which yield a single encoded string as the solution, genetic programming yields a computer program which can be examined and understood. Genetic Programming also offers the possibility of enabling a technique whereby feature vectors can be automatically developed. We have applied the technique to the determination of ship aimpoints from segmented imagery using input from a sensor. The raw imagery is then processed and a feature vector extracted, as was done in a previous problem. The feature vectors are then used as input to the genetic programming technique. We will report on the sensitivity of performance of the genetic programming technique as a function of the metric employed. In addition we will compare the performance of the computer program obtained by genetic programming to the performance of a back propagation neural networks developed for our problem. Furthermore we will report on the performance results obtained using Genetic Programming with and without the presence of automatically created subroutines as well as the determination of critical inputs. RP Schwartz, C (reprint author), USN,DIV WEAPONS,CTR AIR WARFARE,RES & TECHNOL DIV,COMPUTAT SCI BRANCH,CODE 474400D,CHINA LAKE,CA 93555, USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2212-6 J9 P SOC PHOTO-OPT INS PY 1996 VL 2824 BP 191 EP 200 DI 10.1117/12.258132 PG 10 WC Computer Science, Artificial Intelligence; Optics SC Computer Science; Optics GA BG73J UT WOS:A1996BG73J00020 ER PT B AU Yssel, WJ Torrez, WC Lematta, RA AF Yssel, WJ Torrez, WC Lematta, RA GP IEEE TI Measures of effectiveness for multiple ROTHR track data fusion (MRTDF) SO ADFS-96 - FIRST AUSTRALIAN DATA FUSION SYMPOSIUM LA English DT Proceedings Paper CT 1st Australian Data Fusion Symposium (ADFS-96) CY NOV 21-22, 1996 CL ADELAIDE, AUSTRALIA SP IEEE AB Relocatable Over-the-Horizon Radar (ROTHR) is a long range, bi-static, high frequency radar surveillance system tasked with tracking air targets over large land and ocean areas. The long ranges, together with the relatively low altitudes of the targets, require that the radar look beyond the line-of-sight, in other words, over-the-horizon (OTH). This is accomplished by refracting the signal off the ionosphere to points beyond the horizon. In order to quantify the performance of the data fusion of multiple OTH radar tracks, several Measures of Effectiveness (MOEs) have been developed which correspond to the unique technical challenges facing a single OTH radar tracking system. This paper describes appropriate MOEs arising from OTH technical issues relating to ionospheric mode identification, crossing targets, and low Doppler targets. These MOEs were chosen to be sensitive to the performance that would be expected by fusing data from two OTH radar systems having overlapping coverage. RP Yssel, WJ (reprint author), USN,COMMAND CONTROL & OCEAN SURVEILLANCE CTR,RDT&E DIV,SAN DIEGO,CA 92152, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3601-1 PY 1996 BP 106 EP 109 DI 10.1109/ADFS.1996.581090 PG 4 WC Computer Science, Information Systems; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BH60J UT WOS:A1996BH60J00019 ER PT B AU Giannopoulos, E Streit, R Swaszek, P AF Giannopoulos, E Streit, R Swaszek, P GP IEEE TI Probabilistic multi-hypothesis tracking in a multi-sensor, multi-target environment SO ADFS-96 - FIRST AUSTRALIAN DATA FUSION SYMPOSIUM LA English DT Proceedings Paper CT 1st Australian Data Fusion Symposium (ADFS-96) CY NOV 21-22, 1996 CL ADELAIDE, AUSTRALIA SP IEEE AB In this paper the Probabilistic Multi-Hypothesis Tracking (PMHT) Algorithm, a data fusion algorithm recently developed by Streit and Luginbuhl [1, 2], is extended to handle multiple sensors. In addition, performance of multi-target tracking algorithms is discussed in terms of the Cramer-Rao Lower Bound (CRLB) criterion that is computed from the marginalized measurement PMHT log-likelihood function. Simulation results for one set of scenarios are presented and an initialization procedure for the bearings only measurement case is recommended. RP Giannopoulos, E (reprint author), USN,UNDERSEA WARFARE CTR,NEWPORT,RI 02841, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3601-1 PY 1996 BP 184 EP 189 DI 10.1109/ADFS.1996.581104 PG 6 WC Computer Science, Information Systems; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BH60J UT WOS:A1996BH60J00033 ER PT J AU Webb, NJ AF Webb, NJ TI Tax incentives for corporate giving programs: What measures increase funds available? SO ADMINISTRATION IN SOCIAL WORK LA English DT Article AB Policy differences in the treatment of corporations and nonprofit private corporate foundations raise several issues of interest to those who administer and receive donations, as well as those who hope to augment government funds with private charitable donations. Of the $6 billion donated by corporations to charitable in 1994, approximately one-fourth came through corporate foundations. What determines the choice of giving through a foundation or directly to charity? The author examines the financial implications for each type of corporate giving by presenting specific elements of current policy on tax rates and deductions for giving. Specific factors considered are (1) differences in the treatment of corporate and foundation income, (2) deductibility of different types of gifts, (3) occurrence of donations to non-U.S. (Non-tax-deductible) charities, (4) sales of assets to fund corporate foundations, (5) effects of giving on corporate image, and (6) effects of contributions over time. Analysis of regulations illustrates motivating factors for why corporate executives make certain types of gifts in certain ways. The author clarifies how social workers, fundraisers, nonprofit manages, and corporate officials alike benefit from understanding the differences among types of gifts, methods of giving, and deductibility of corporate donations. RP Webb, NJ (reprint author), USN,POSTGRAD SCH,DRMI,1522 CUNNINGHAM RD,MONTEREY,CA 93943, USA. NR 18 TC 1 Z9 1 U1 0 U2 2 PU HAWORTH PRESS INC PI BINGHAMTON PA 10 ALICE ST, BINGHAMTON, NY 13904-1580 SN 0364-3107 J9 ADMIN SOC WORK JI Adm. Soc. Work PY 1996 VL 20 IS 3 BP 39 EP & DI 10.1300/J147v20n03_03 PG 19 WC Public Administration; Social Work SC Public Administration; Social Work GA VC516 UT WOS:A1996VC51600003 PM 10160409 ER PT S AU Chrisey, DB Horwitz, JS Mehlman, G Auyeung, RCY Dorsey, PC AF Chrisey, DB Horwitz, JS Mehlman, G Auyeung, RCY Dorsey, PC BE Singh, R Norton, D Laude, L Narayan, J Cheung, J TI Resolved vacuum ultraviolet observations of excimer laser-produced YBa2Cu3O7 plasmas SO ADVANCED LASER PROCESSING OF MATERIALS - FUNDAMENTALS AND APPLICATIONS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Advanced Laser Processing of Materials - Fundamentals and Applications, at the 1995 MRS Fall Meeting CY NOV 27-30, 1995 CL BOSTON, MA SP Mat Res Soc C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 4 Z9 4 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-300-2 J9 MATER RES SOC SYMP P PY 1996 VL 397 BP 99 EP 104 PG 6 WC Materials Science, Multidisciplinary; Optics SC Materials Science; Optics GA BG31J UT WOS:A1996BG31J00012 ER PT S AU Chrisey, DB Knauss, LA Horwitz, JS Auyeung, RCY Knies, D Grabowski, KS Donovan, EP McCallion, K Johnstone, W AF Chrisey, DB Knauss, LA Horwitz, JS Auyeung, RCY Knies, D Grabowski, KS Donovan, EP McCallion, K Johnstone, W BE Singh, R Norton, D Laude, L Narayan, J Cheung, J TI Thin films of ferroelectrics made by pulsed laser deposition for optoelectronic applications SO ADVANCED LASER PROCESSING OF MATERIALS - FUNDAMENTALS AND APPLICATIONS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Advanced Laser Processing of Materials - Fundamentals and Applications, at the 1995 MRS Fall Meeting CY NOV 27-30, 1995 CL BOSTON, MA SP Mat Res Soc C1 USN,RES LAB,WASHINGTON,DC 20375. OI Grabowski, Kenneth/0000-0003-0816-001X NR 0 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-300-2 J9 MATER RES SOC SYMP P PY 1996 VL 397 BP 193 EP 198 PG 6 WC Materials Science, Multidisciplinary; Optics SC Materials Science; Optics GA BG31J UT WOS:A1996BG31J00025 ER PT J AU Yamamoto, Y Yun, XP AF Yamamoto, Y Yun, XP TI Stability analysis of a mobile manipulator under force control SO ADVANCED ROBOTICS LA English DT Article AB Coordination of multiple mobile agents in general requires interactions between an agent and its external, e.g. another agent or its environment. It is therefore essential for each agent to maintain its stability while interacting with the external. In this study we analyze the stability of a mobile manipulator under force control. A lumped linear mass model is employed due to its simplicity and expressivity. First, a mobile platform and a manipulator with an environment are modeled separately. Both are then combined to yield a mobile manipulator model whose behavior is examined under various force control laws. C1 USN, POSTGRAD SCH, DEPT ELECT & COMP ENGN, MONTEREY, CA 93943 USA. RP IBARAKI UNIV, DEPT SYST ENGN, 4-12-1 NAKANARUSAWA, HITACHI, IBARAKI, JAPAN. NR 17 TC 0 Z9 0 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND SN 0169-1864 EI 1568-5535 J9 ADV ROBOTICS JI Adv. Robot. PY 1996 VL 10 IS 5 BP 487 EP 502 PG 16 WC Robotics SC Robotics GA WC059 UT WOS:A1996WC05900004 ER PT B AU Korzeniowski, KA AF Korzeniowski, KA BE Nnaji, BO TI Using supervised learning to fuse sensor data for surface tracking in complex environments SO ADVANCED SENSOR AND CONTROL-SYSTEM INTERFACE SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advanced Sensor and Control-System Interface CY NOV 21-22, 1996 CL BOSTON, MA SP Soc Photo Opt Instrumentat Engineers DE surface following; force control; supervised learning; sensor fusion; actuators AB This paper is concerned with the problem of optimizing surface following control in automated systems. Tracking a surface is an integral task for many autonomous system. It can be used for navigation, surface preparation or object recognition. There are two type of control for surface following, continuous and discontinuous. The robot may maintain contact and continuously track the surface or touch the surface at discontinuous points. A balance is sought between each surface tracking method in the path planning phase, in order that the whole process be optimized in terms of time to complete the task and the amount of data collected. The tracking method is computed by the tracking algorithm using the partial data sets provided by sensors. It is common practice to outfit automated systems with the ability to gather data from many sensors. As the environmental conditions change, sensor reliability changes. Thus, the system's reliance on sensor data must also change. This work focuses on the addition of the supervisory learning module for choosing the method of surface tracking. RP Korzeniowski, KA (reprint author), USN ACAD,DEPT ELECT ENGN,ANNAPOLIS,MD 21402, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2313-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2911 BP 2 EP 8 DI 10.1117/12.262497 PG 7 WC Instruments & Instrumentation; Optics SC Instruments & Instrumentation; Optics GA BG93Z UT WOS:A1996BG93Z00001 ER PT B AU Hughes, DH AF Hughes, DH BE Luk, FT TI Applications of time-scale methods to linear and nonlinear wave propagation in a one-dimensional disordered lattice SO ADVANCED SIGNAL PROCESSING ALGORITHMS, ARCHITECTURES, AND IMPLEMENTATIONS VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advanced Signal Processing Algorithms, Architectures, and Implementations VI CY AUG 06-08, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE wavelet; edge detection; soliton; hyperbolic functions; disorder; scaling laws C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2234-7 J9 P SOC PHOTO-OPT INS PY 1996 VL 2846 BP 204 EP 219 DI 10.1117/12.255435 PG 16 WC Optics SC Optics GA BG61D UT WOS:A1996BG61D00020 ER PT B AU Rohrbaugh, R AF Rohrbaugh, R BE Luk, FT TI Time-frequency analysis of a motor-generator SO ADVANCED SIGNAL PROCESSING ALGORITHMS, ARCHITECTURES, AND IMPLEMENTATIONS VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advanced Signal Processing Algorithms, Architectures, and Implementations VI CY AUG 06-08, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers C1 USN,CTR SURFACE WARFARE,ADV SIGNAL PROC BRANCH,BREMERTON,WA 98314. NR 0 TC 3 Z9 3 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2234-7 J9 P SOC PHOTO-OPT INS PY 1996 VL 2846 BP 240 EP 250 DI 10.1117/12.255437 PG 11 WC Optics SC Optics GA BG61D UT WOS:A1996BG61D00022 ER PT B AU Hollinberger, DE Madhavan, PG AF Hollinberger, DE Madhavan, PG BE Luk, FT TI Directional spatial frequency distribution of two dimensional signals SO ADVANCED SIGNAL PROCESSING ALGORITHMS, ARCHITECTURES, AND IMPLEMENTATIONS VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advanced Signal Processing Algorithms, Architectures, and Implementations VI CY AUG 06-08, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE time-frequency analysis; two dimensional frequency analysis; image analysis; ocean waves C1 USN,AIR WARFARE CTR,INDIANAPOLIS,IN. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2234-7 J9 P SOC PHOTO-OPT INS PY 1996 VL 2846 BP 273 EP 283 DI 10.1117/12.255440 PG 11 WC Optics SC Optics GA BG61D UT WOS:A1996BG61D00025 ER PT B AU Theriault, GA Lieberman, SH AF Theriault, GA Lieberman, SH BE VoDinh, T TI Field deployment of a LIBS probe for rapid delineation of metals in soils SO ADVANCED TECHNOLOGIES FOR ENVIRONMENTAL MONITORING AND REMEDIATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advanced Technologies for Environmental Monitoring and Remediation CY AUG 06-08, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE FOLIBS; fiber optic; laser induced breakdown spectroscopy; LIES; SCAPS; CPT; cone penetrometer; in situ metal detection AB A fiber optic probe for use in the in situ delineation of subsurface metal contamination is described. The probe is based on the technique of laser-induced breakdown spectroscopy and is designed for deployment via a standard cone penetrometer truck. Initial measurements of the detection limits of the probe on Pb and Cr contaminated sands are in the low ppm range. RP Theriault, GA (reprint author), USN COMMAND,CONTROL & OCEAN SURVEILLANCE CTR,RDT&E DIV,CODE 361,SAN DIEGO,CA 92152, USA. NR 0 TC 11 Z9 11 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2223-1 J9 P SOC PHOTO-OPT INS PY 1996 VL 2835 BP 83 EP 88 DI 10.1117/12.259760 PG 6 WC Engineering, Environmental; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BH01G UT WOS:A1996BH01G00010 ER PT B AU Knowles, DS Kertesz, J AF Knowles, DS Kertesz, J BE VoDinh, T TI Fluorescence detection of petroleum contamination: Evaluation of various lasers for SCAPS sensor SO ADVANCED TECHNOLOGIES FOR ENVIRONMENTAL MONITORING AND REMEDIATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advanced Technologies for Environmental Monitoring and Remediation CY AUG 06-08, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE laser induced fluorescence; field screening; petroleum contamination; site characterization; SCAPS AB The Site Characterization and Analysis Penetrometer System (SCAPS) detects underground petroleum contamination using a laser induced fluorescence (LIF) sensor that is hydraulically pushed into the ground by a 20 ton cone penetrometer truck. The sensitivity of the sensor depends on both the excitation wavelength and the composition of the petroleum contaminant. The efficiency of three laser sources (Nitrogen laser at 337nm, XeCl excimer laser at 308 nm and Nd:YAG laser at 266 nm) have been compared using soil spiked with fuels and various fuels dissolved in acetonitrile. RP Knowles, DS (reprint author), USN COMMAND,CONTROL & OCEAN SURVEILLANCE CTR,RES DEV TESTING & EVALUAT DIV,CODE 361,SAN DIEGO,CA 92152, USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2223-1 J9 P SOC PHOTO-OPT INS PY 1996 VL 2835 BP 228 EP 233 DI 10.1117/12.259783 PG 6 WC Engineering, Environmental; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BH01G UT WOS:A1996BH01G00026 ER PT B AU Fahy, G AF Fahy, G BE Klatz, RM TI Organ cryopreservation SO ADVANCES IN ANTI-AGING MEDICINE, VOL 1 SE ADVANCES IN ANTI-AGING MEDICINE LA English DT Proceedings Paper CT 1994 Conference on Anti-Aging Medicine CY 1994 CL LAS VEGAS, NV SP Amer Acad Anti Aging Med C1 USN,MED RES INST,TRANSFUS & CRYOPRESERVAT RES PROGRAM,BETHESDA,MD. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MARY ANN LIEBERT INC PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 BN 0-913113-71-9 J9 ADV ANTI AGING MED PY 1996 VL 1 BP 249 EP 255 PG 7 WC Geriatrics & Gerontology; Pharmacology & Pharmacy SC Geriatrics & Gerontology; Pharmacology & Pharmacy GA BE51Q UT WOS:A1996BE51Q00024 ER PT B AU Hansen, DC AF Hansen, DC BE Clayton, CR Hirvonen, JK Srivatsa, AR TI The application and subsequent cross-linking of a biological polymer on aluminum metal SO ADVANCES IN COATINGS TECHNOLOGIES FOR SURFACE ENGINEERING LA English DT Proceedings Paper CT Symposium on Advances in Coatings Technologies for Surface Engineering, at the Annual Meeting of the Minerals-Metals-and-Materials-Society CY FEB 09-13, 1997 CL ORLANDO, FL SP Minerals Met & Mat Soc. Surface Modificat & Coatiangs Technol Comm AB Biological polymers that are used by organisms in the formation of structural materials and protective coatings are widespread in nature. An example of such a polymer is a protein utilized by the blue mussel Mytilus edulis as a varnish coating on its byssal threads. This protein is of high molecular weight (>100,000) and is unique in containing the catecholic amino acid L-dopa. The adsorption of this protein onto pure aluminum (99.9995%) and subsequent crosslinking of the adsorbed protein results in a significant shift in the critical pitting potential and polarization resistance of the treated aluminum metal when immersed in 0.1M sodium chloride solution. Atomic Force Microscopy (AFM) measurements clearly show that treatment of the protein adsorbed onto Highly Ordered Pyrolytic Graphite (HOPG) with catechol oxidase results in a stable coating. C1 USN, Res Lab, Washington, DC 20375 USA. RP Hansen, DC (reprint author), USN, Res Lab, Washington, DC 20375 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA BN 0-87339-371-6 PY 1996 BP 195 EP 209 PG 15 WC Metallurgy & Metallurgical Engineering; Materials Science, Coatings & Films SC Metallurgy & Metallurgical Engineering; Materials Science GA BK37G UT WOS:000071923800014 ER PT B AU Natishan, PM McCafferty, E Hubler, GK Sartwell, BD AF Natishan, PM McCafferty, E Hubler, GK Sartwell, BD BE Clayton, CR Hirvonen, JK Srivatsa, AR TI The use of ion beam surface modification techniques for corrosion protection SO ADVANCES IN COATINGS TECHNOLOGIES FOR SURFACE ENGINEERING LA English DT Proceedings Paper CT Symposium on Advances in Coatings Technologies for Surface Engineering, at the Annual Meeting of the Minerals-Metals-and-Materials-Society CY FEB 09-13, 1997 CL ORLANDO, FL SP Minerals Met & Mat Soc. Surface Modificat & Coatiangs Technol Comm AB Environmental concerns and regulations are driving forces to develop and use new coatings and surface modification techniques that are environmentally benign. The ion beam techniques have many advantages that make them attractive compared to presently used surface treatments as they are environmentally friendly and provide a means to produce new and unique materials. Ion implantation and ion beam assisted deposition have also been shown to improve the corrosion resistance of aluminum as well as other metals and alloys. This paper will discuss the use of ion implantation and ion beam assisted deposition as related to their application to the corrosion protection of aluminum. C1 USN, Res Lab, Washington, DC 20375 USA. RP Natishan, PM (reprint author), USN, Res Lab, Washington, DC 20375 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA BN 0-87339-371-6 PY 1996 BP 271 EP 285 PG 15 WC Metallurgy & Metallurgical Engineering; Materials Science, Coatings & Films SC Metallurgy & Metallurgical Engineering; Materials Science GA BK37G UT WOS:000071923800020 ER PT B AU Walters, JD Cooper, TL Fikse, T AF Walters, JD Cooper, TL Fikse, T BE Kittel, P TI Thermal conductivity of vacuum pressure impregnated Cu and Al stabilized NbTi superconducting coils SO ADVANCES IN CRYOGENIC ENGINEERING, VOL 41, PTS A AND B LA English DT Proceedings Paper CT 1995 Cryogenic Engineering Conference CY JUL 17-21, 1995 CL COLUMBUS, OH SP Battelle Mem Inst, CVI Inc, Lake Shore Cryotron Inc C1 USN,CTR SURFACE WARFARE,CARDEROCK DIV,ANNAPOLIS DETACHMENT,ANNAPOLIS,MD 21402. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-45300-2 J9 ADV CRYOG ENG PY 1996 BP 123 EP 130 PG 8 WC Engineering, Electrical & Electronic; Engineering, Mechanical; Materials Science, Multidisciplinary; Physics, Condensed Matter; Polymer Science SC Engineering; Materials Science; Physics; Polymer Science GA BG31Z UT WOS:A1996BG31Z00016 ER PT B AU Cooper, TL Walters, JD Fikse, TH AF Cooper, TL Walters, JD Fikse, TH BE Kittel, P TI Thermal conductance of heat transfer interfaces for conductively cooled superconducting magnets SO ADVANCES IN CRYOGENIC ENGINEERING, VOL 41, PTS A AND B LA English DT Proceedings Paper CT 1995 Cryogenic Engineering Conference CY JUL 17-21, 1995 CL COLUMBUS, OH SP Battelle Mem Inst, CVI Inc, Lake Shore Cryotron Inc C1 USN,CTR SURFACE WARFARE,ANNAPOLIS,MD 21041. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-45300-2 J9 ADV CRYOG ENG PY 1996 BP 297 EP 304 PG 8 WC Engineering, Electrical & Electronic; Engineering, Mechanical; Materials Science, Multidisciplinary; Physics, Condensed Matter; Polymer Science SC Engineering; Materials Science; Physics; Polymer Science GA BG31Z UT WOS:A1996BG31Z00038 ER PT S AU Chu, E Allegra, CJ AF Chu, E Allegra, CJ BE Weber, G TI The role of thymidylate synthase in cellular regulation SO ADVANCES IN ENZYME REGULATION, VOL 36 SE ADVANCES IN ENZYME REGULATION LA English DT Article; Proceedings Paper CT 36th Symposium on Regulation of Enzyme Activity and Synthesis in Normal and Neoplastic Tissues CY OCT 02-03, 1995 CL INDIANAPOLIS, IN ID COLON-CANCER-CELLS; TRANSFER-RNA SYNTHETASE; TUMOR-SUPPRESSOR GENE; KINASE MESSENGER-RNA; DIHYDROFOLATE-REDUCTASE; ESCHERICHIA-COLI; THYMIDINE KINASE; BINDING-SITE; MOUSE FIBROBLASTS; BREAST-CANCER RP Chu, E (reprint author), NCI,USN,MED ONCOL BRANCH,BETHESDA,MD 20889, USA. NR 69 TC 45 Z9 45 U1 0 U2 1 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0065-2571 BN 0-08-042894-0 J9 ADV ENZYME REGUL PY 1996 VL 36 BP 143 EP 163 DI 10.1016/0065-2571(95)00004-6 PG 21 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA BG03K UT WOS:A1996BG03K00009 PM 8869745 ER PT S AU Ramamurti, R Lohner, R Sandberg, W AF Ramamurti, R Lohner, R Sandberg, W BE Rahman, M Brebbia, CA TI Computation of the unsteady flow past a tuna with caudal fin oscillation SO ADVANCES IN FLUID MECHANICS SE ADVANCES IN FLUID MECHANICS SERIES LA English DT Proceedings Paper CT 1st International Conference on Advances in Fluid Mechanics (AFM 96) CY JUN, 1996 CL NEW ORLEANS, LA SP Wessex Inst Technol, UK, TU Nova Scotia, Canada C1 USN,RES LAB,COMPUTAT PHYS & FLUID DYNAM LAB,WASHINGTON,DC 20375. NR 0 TC 15 Z9 15 U1 0 U2 0 PU COMPUTATIONAL MECHANICS PUBLICATIONS LTD PI SOUTHAMPTON PA ASHURST LODGE, SOUTHAMPTON, HANTS, ENGLAND S04 2AA SN 1353-808X BN 1-85312-452-4 J9 ADV FLUID MECH SER PY 1996 VL 9 BP 169 EP 178 PG 10 WC Engineering, Chemical; Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA BF92Z UT WOS:A1996BF92Z00017 ER PT S AU Makeig, S Bell, AJ Jung, TP Sejnowski, TJ AF Makeig, S Bell, AJ Jung, TP Sejnowski, TJ BE Touretzky, DS Mozer, MC Hasselmo, ME TI Independent component analysis of electroencephalographic data SO ADVANCES IN NEURAL INFORMATION PROCESSING SYSTEMS 8: PROCEEDINGS OF THE 1995 CONFERENCE SE ADVANCES IN NEURAL INFORMATION PROCESSING SYSTEMS LA English DT Proceedings Paper CT 9th Annual Conference on Neural Information Processing Systems (NIPS) CY NOV 27-30, 1995 CL DENVER, CO C1 USN,HLTH RES CTR,SAN DIEGO,CA 92186. NR 0 TC 733 Z9 757 U1 1 U2 15 PU M I T PRESS PI CAMBRIDGE PA 55 HAYWARD ST, CAMBRIDGE, MA 02142 SN 1049-5258 BN 0-262-20107-0 J9 ADV NEUR IN PY 1996 VL 8 BP 145 EP 151 PG 3 WC Computer Science, Information Systems; Neurosciences SC Computer Science; Neurosciences & Neurology GA BG45M UT WOS:A1996BG45M00021 ER PT S AU Makeig, S Jung, TP Sejnowski, TJ AF Makeig, S Jung, TP Sejnowski, TJ BE Touretzky, DS Mozer, MC Hasselmo, ME TI Using feedforward neural networks to monitor alertness from changes in EEG correlation and coherence SO ADVANCES IN NEURAL INFORMATION PROCESSING SYSTEMS 8: PROCEEDINGS OF THE 1995 CONFERENCE SE ADVANCES IN NEURAL INFORMATION PROCESSING SYSTEMS LA English DT Proceedings Paper CT 9th Annual Conference on Neural Information Processing Systems (NIPS) CY NOV 27-30, 1995 CL DENVER, CO C1 USN,HLTH RES CTR,SAN DIEGO,CA 92186. NR 0 TC 19 Z9 19 U1 0 U2 1 PU M I T PRESS PI CAMBRIDGE PA 55 HAYWARD ST, CAMBRIDGE, MA 02142 SN 1049-5258 BN 0-262-20107-0 J9 ADV NEUR IN PY 1996 VL 8 BP 931 EP 937 PG 3 WC Computer Science, Information Systems; Neurosciences SC Computer Science; Neurosciences & Neurology GA BG45M UT WOS:A1996BG45M00131 ER PT B AU Imam, MA Feng, CR AF Imam, MA Feng, CR BE Weiss, I Srinivasan, R Bania, PJ Eylon, D Semiatin, SL TI Role of oxygen on transformation kinetics in Timetal-21S titanium alloy SO ADVANCES IN THE SCIENCE AND TECHNOLOGY OF TITANIUM ALLOY PROCESSING LA English DT Proceedings Paper CT International Symposium on Advances in the Science and Technology of Titanium Alloy Processing at the 125th TMS Annual Meeting and Exhibition CY FEB 05-08, 1996 CL ANAHEIM, CA SP TMS Titanium & Shaping & Forming Comm AB The Timetal-21S, Ti-15Mo-3Al-2.8Nb-0.2Si, is one of the newest beta titanium alloy which has shown excellent resistance to corrosion and heat compared to other beta titanium alloys. Interstitial elements such as oxygen, nitrogen, carbon, and hydrogen affect the transformation characteristics of the Timetal-21S resulting in variations of the mechanical properties. Although the stable phase at room temperature is alpha, the metastable beta is retained even after slow cooling from above the beta transus temperature. The transformation of beta phase is sluggish and can be controlled to produce desired properties. The structure of the transformed products and their distribution depends on the aging conditions and interstitial contents. The present investigation deals with the role of oxygen on the phase transformation kinetics and establish a time-temperature and transformation curves of Timetal-21S. Oxygen contents in the alloy was systematically varied from 0.09 to 0.33 wt%. C1 USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA. RP Imam, MA (reprint author), USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA. NR 13 TC 1 Z9 1 U1 0 U2 3 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA BN 0-87339-324-4 PY 1996 BP 435 EP 450 PG 16 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BM47L UT WOS:000078852200038 ER PT J AU Chandrasekhara, MS Wilder, MC Carr, LW AF Chandrasekhara, MS Wilder, MC Carr, LW TI Boundary-layer-tripping studies of compressible dynamic stall flow SO AIAA JOURNAL LA English DT Article ID AIRFOIL AB The challenging task of properly tripping the boundary layer of a leading-edge-stalling airfoil experiencing compressible dynamic stall at Reynolds numbers between 3.6 x 10(5) and 8.1 x 10(5) has been addressed. Real-time interferometry data of the flow over an oscillating airfoil have been obtained at freestream Mach numbers of 0.3 and 0.45. The airfoil was tripped by separately placing five different trips of varying lengths near the leading edge. The trip heights ranged from 40 to 175 mu m. The resulting flow and airfoil performance were evaluated using the criteria of elimination of the laminar separation bubble that otherwise forms, delay of dynamic stall onset to higher angles of attack, and production of consistently higher suction peaks. Quantitative analysis of the interferograms showed that the laminar separation bubble was still present with the smallest trip and premature dynamic stall occurred with the largest trip. The right trip was determined to be a distributed roughness element extending from 0.5 to 3% chord. Its height was found to compare reasonably with the airfoil boundary-layer thickness at the dynamic stall vortex formation angle of attack, at a location slightly upstream of the vortex origin in the adverse pressure gradient region. C1 USN,POSTGRAD SCH,MONTEREY,CA 93943. MCAT INST,SAN JOSE,CA 95127. USA,AEROFLIGHTDYNAM DIRECTORATE,MOFFETT FIELD,CA 94035. NR 22 TC 5 Z9 5 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD JAN PY 1996 VL 34 IS 1 BP 96 EP 103 DI 10.2514/3.13027 PG 8 WC Engineering, Aerospace SC Engineering GA TP059 UT WOS:A1996TP05900014 ER PT B AU Kent, D AF Kent, D BE Fishell, WG Andraitis, AA Crane, AC Fagan, MS TI Long-term solution to the imagery bandwidth problem SO AIRBORNE RECONNAISSANCE XX SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Airborne Reconnaissance XX Conference CY AUG 06-07, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers, N Amer Remote Sensing Ind Assoc, Amer Soc Photogrammetry & Remote Sensing RP Kent, D (reprint author), USN,AIR WARFARE CTR,DIV AIRCRAFT,WARMINSTER,PA 18974, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2217-7 J9 P SOC PHOTO-OPT INS PY 1996 VL 2829 BP 255 EP 264 PG 10 WC Engineering, Aerospace; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BG83K UT WOS:A1996BG83K00019 ER PT S AU Dutta, I Majumdar, BS AF Dutta, I Majumdar, BS BE Driver, JH Dubost, B Durand, F Fougeres, R Guyot, P Sainfort, P Suery, M TI Effect of processing on the fracture characteristics of a 6092 Al composite reinforced with SiCp SO ALUMINIUM ALLOYS: THEIR PHYSICAL AND MECHANICAL PROPERTIES, PTS 1-3 SE MATERIALS SCIENCE FORUM LA English DT Article; Proceedings Paper CT 5th International Conference on Aluminium Alloys - Their Physical and Mechanical Properties (ICAA5) CY JUL 01-05, 1996 CL GRENOBLE, FRANCE SP Soc Francaise Met & Mat, Inst Natl Polytech Grenoble DE aluminum; composite; particulate; fracture; processing ID METAL-MATRIX COMPOSITES; ALUMINUM AB The evolution of microstructure and mechanical properties of a 17.5 vol.% SiCp reinforced 6092 Al composite has been studied as a function of post-fabrication processing. It has been found that control of particulate distribution, matrix grain and sub-structure, and the matrix precipitate state can be utilized effectively to optimize strength-toughness relationships in these composites. Depending on the specific microstructural condition, the composite can display a wide range of properties ranging from strong, brittle behavior with K-controlled failure on the one hand, to a soft, tough behavior showing slow, stable crack growth with a steep J(R)-curve on the other hand. This demonstrates that by appropriate microstructural control, substantially larger intrinsic toughenesses may be obtained in Al-SiCp composites than previously thought. C1 UNIVERSAL ENERGY SYST INC,DAYTON,OH 45432. RP Dutta, I (reprint author), USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943, USA. NR 16 TC 2 Z9 2 U1 0 U2 2 PU TRANSTEC PUBLICATIONS LTD PI ZURICH-UETIKON PA BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLAND SN 0255-5476 BN 0-87849-732-3 J9 MATER SCI FORUM PY 1996 VL 217 BP 1473 EP 1478 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BG37W UT WOS:A1996BG37W00235 ER PT J AU Taylor, HA AF Taylor, HA TI Techniques for performing neonatal circumcision SO AMERICAN FAMILY PHYSICIAN LA English DT Letter RP Taylor, HA (reprint author), USN HOSP,JACKSONVILLE,FL, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ACAD FAMILY PHYSICIANS PI KANSAS CITY PA 8880 WARD PARKWAY, KANSAS CITY, MO 64114-2797 SN 0002-838X J9 AM FAM PHYSICIAN JI Am. Fam. Physician PD JAN PY 1996 VL 53 IS 1 BP 92 EP & PG 2 WC Primary Health Care; Medicine, General & Internal SC General & Internal Medicine GA TQ021 UT WOS:A1996TQ02100010 PM 8546065 ER PT J AU Ringler, RL AF Ringler, RL TI Techniques for performing neonatal circumcision - Reply SO AMERICAN FAMILY PHYSICIAN LA English DT Letter RP Ringler, RL (reprint author), USN HOSP,BREMERTON,WA, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ACAD FAMILY PHYSICIANS PI KANSAS CITY PA 8880 WARD PARKWAY, KANSAS CITY, MO 64114-2797 SN 0002-838X J9 AM FAM PHYSICIAN JI Am. Fam. Physician PD JAN PY 1996 VL 53 IS 1 BP 98 EP & PG 2 WC Primary Health Care; Medicine, General & Internal SC General & Internal Medicine GA TQ021 UT WOS:A1996TQ02100013 ER PT J AU Orebaugh, SL AF Orebaugh, SL TI Initiation of mechanical ventilation in the emergency department SO AMERICAN JOURNAL OF EMERGENCY MEDICINE LA English DT Review DE mechanical ventilation; positive pressure ventilation; ventilator; adult respiratory distress syndrome; cardiogenic pulmonary edema; acute respiratory failure; pulmonary physiology; obstructive airways disease ID END-EXPIRATORY PRESSURE; RESPIRATORY-DISTRESS SYNDROME; POSITIVE AIRWAY PRESSURE; INTERMITTENT MANDATORY VENTILATION; ACUTE MYOCARDIAL-INFARCTION; STATUS-ASTHMATICUS; FLOW OBSTRUCTION; TIDAL VOLUME; PHYSIOLOGIC APPROACH; PULMONARY-EDEMA AB Mechanical ventilation is frequently initiated by emergency physicians, Further, the physician on duty in the emergency department is frequently responsible for evaluating ventilated patients who decompensate in the intensive care unit when other physicians are not present in the hospital, A bewildering array of features on new mechanical ventilators has made their appropriate and effective use increasingly complex, Knowledge of the pathophysiology of acute respiratory failure and changes in lung physiology during positive pressure ventilation will aid the emergency physician in choosing an appropriate ventilator modality and initial settings to maximally benefit patients with respiratory insufficiency due to various causes, An appreciation of the adverse effects of mechanical ventilation and problems commonly encountered in patients on ventilators will prepare the emergency physician to rapidly assess and effectively manage the patient who deteriorates in this setting. RP Orebaugh, SL (reprint author), USN,MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. NR 114 TC 4 Z9 4 U1 0 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0735-6757 J9 AM J EMERG MED JI Am. J. Emerg. Med. PD JAN PY 1996 VL 14 IS 1 BP 59 EP 69 DI 10.1016/S0735-6757(96)90018-2 PG 11 WC Emergency Medicine SC Emergency Medicine GA TU821 UT WOS:A1996TU82100018 PM 8630160 ER PT J AU Wallace, MR Sharp, TW Smoak, B Iriye, C Rozmajzl, P Thornton, SA Batchelor, R Magill, AJ Lobel, HO Longer, CF Burans, JP AF Wallace, MR Sharp, TW Smoak, B Iriye, C Rozmajzl, P Thornton, SA Batchelor, R Magill, AJ Lobel, HO Longer, CF Burans, JP TI Malaria among United States troops in Somalia SO AMERICAN JOURNAL OF MEDICINE LA English DT Article ID FALCIPARUM-MALARIA; MEFLOQUINE; CHEMOPROPHYLAXIS; PROPHYLAXIS; DOXYCYCLINE AB PURPOSE: United States military personnel deployed to Somalia were at risk for malaria, including chloroquine-resistant Plasmodium falciparum malaria. This report details laboratory, clinical, preventive, and therapeutic aspects of malaria in this cohort. PATIENTS AND METHODS: The study took place in US military field hospitals in Somalia, with US troops deployed to Somalia between December 1992 and May 1993. Centralized clinical care and country-wide disease surveillance facilitated standardized laboratory diagnosis, clinical records, epidemiologic studies, and assessment of chemoprophylactic efficacy. RESULTS: Forty-eight cases of malaria occurred among US troops while in Somalia; 41 of these cases were P falciparum. Risk factors associated with malaria included: noncompliance with recommended chemoprophylaxis (odds ratio [OR] 2.4); failure to use bed nets (OR 2.6); and failure to keep sleeves rolled down (OR 2.2). Some patients developed malaria in spite of mefloquine (n = 8) or doxycycline (n = 5) levels compatible with chemoprophylactic compliance. Five mefloquine failures had both serum levels greater than or equal to 650 ng/mL and metabolite:mefloquine ratios over 2, indicating chemoprophylactic failure. All cases were successfully treated, including 1 patient who developed cerebral malaria. CONCLUSIONS: P falciparum malaria attack rates were substantial in the first several weeks of Operation Restore Hope. While most cases occurred because of noncompliance with personal protective measures or chemoprophylaxis, both mefloquine and doxycycline chemoprophylactic failures occurred. Military or civilian travelers to East Africa must be scrupulous in their attention to both chemoprophylaxis and personal protection measures. C1 USN,NAVAL MED CTR,DEPT INTERNAL MED,DIV INFECT DIS,SAN DIEGO,CA 92134. USN,MED RES INST,BETHESDA,MD 20814. WALTER REED ARMY MED CTR,WALTER REED ARMY INST RES,WASHINGTON,DC 20307. USN,MED CTR,OAKLAND,CA. USN,ENVIRONM & PREVENT MED UNIT 7,NAPLES,ITALY. USN,MED RES UNIT 3,CAIRO,EGYPT. CTR DIS CONTROL,ATLANTA,GA 30333. RP Wallace, MR (reprint author), USN,MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. NR 25 TC 82 Z9 82 U1 0 U2 7 PU EXCERPTA MEDICA INC PI NEW YORK PA 245 WEST 17TH STREET, NEW YORK, NY 10011 SN 0002-9343 J9 AM J MED JI Am. J. Med. PD JAN PY 1996 VL 100 IS 1 BP 49 EP 55 DI 10.1016/S0002-9343(96)90011-X PG 7 WC Medicine, General & Internal SC General & Internal Medicine GA TT033 UT WOS:A1996TT03300011 PM 8579087 ER PT J AU Lane, JI Koeller, KK Atkinson, JDL AF Lane, JI Koeller, KK Atkinson, JDL TI MR imaging of the lumbar spine: Enhancement of the radicular veins SO AMERICAN JOURNAL OF ROENTGENOLOGY LA English DT Article ID LUMBOSACRAL SPINE AB Enhancement of lumbar nerve roots in the setting of degenerative disk disease has been considered by several authors as evidence of a breakdown in the blood-nerve barrier induced by nerve root compression [1-3]. Unfortunately, correlation between radicular enhancement and the clinically determined level of radiculopathy has not been consistently shown [4, 5]. We recently proposed that this phenomenon represents intravascular enhancement of radicular veins that travel adjacent to or within the endoneurium of one or more nerve roots of the cauda equina [4, 5]. Our purpose in this pictorial essay is to illustrate the appearance of radicular vein enhancement so that this phenomenon will not be misinterpreted as being clinically significant in the setting of degenerative disk disease. C1 USN HOSP,DEPT RADIOL,NEUROSURG SECT,SAN DIEGO,CA 92134. MAYO CLIN & MAYO FDN,DEPT NEUROSURG,ROCHESTER,MN 55905. USN HOSP,DEPT RADIOL,NEURORADIOL SECT,OAKLAND,CA 94627. NR 9 TC 6 Z9 6 U1 0 U2 1 PU AMER ROENTGEN RAY SOC PI RESTON PA 1891 PRESTON WHITE DR SUBSCRIPTION FULFILLMENT, RESTON, VA 22091 SN 0361-803X J9 AM J ROENTGENOL JI Am. J. Roentgenol. PD JAN PY 1996 VL 166 IS 1 BP 181 EP 185 PG 5 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA TL367 UT WOS:A1996TL36700040 PM 8571872 ER PT J AU Cope, SE Schultz, GW Richards, AL Savage, HM Smith, GC Mitchell, CJ Fryauff, DJ Conlon, JM Corneil, JA Hyams, KC AF Cope, SE Schultz, GW Richards, AL Savage, HM Smith, GC Mitchell, CJ Fryauff, DJ Conlon, JM Corneil, JA Hyams, KC TI Assessment of arthropod vectors of infectious diseases in areas of US Troop deployment in the Persian Gulf SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID OPERATION DESERT-STORM; CUTANEOUS LEISHMANIASIS; SAUDI-ARABIA; TROPICA; ARBOVIRUS AB Beginning in August 1990, approximately 800,000 coalition troops were deployed to the Persian Gulf during Operations Desert Shield and Desert Storm. There was substantial concern about arthropod-borne diseases, particularly sand fly fever and cutaneous leishmaniasis, because of high morbidity rates in the Persian Gulf during World War II (WWII). In sharp contrast to WWII, there was no report of sand fly fever among coalition forces and only 31 cases of leishmaniasis among 697,000 U.S. troops. To further evaluate the risk of arthropod-borne diseases, an entomologic survey was conducted in 12 areas of Kuwait and Saudi Arabia. A total of 1,556 arthropods was collected during four survey periods in 1992. The suspected vectors of cutaneous Leishmania major infection, sand fly fever, West Nile fever, Rift Valley fever, and Crimean-Congo hemorrhagic fever were identified; however, there was no evidence of arboviruses or Leishmania among collected specimens nor from 51 trapped rodents. There are several possible reasons for the low risk of arthropod-borne infectious diseases among Desert Shield/Storm troops in an area where suspected vectors frequently were found: the use of insecticides and repellents, and the deployment of most ground troops to the open desert during the cooler, winter period-conditions least favorable for the transmission of arthropod-borne diseases. C1 USN,MED RES UNIT 3,CAIRO,EGYPT. USN,DIS VECTOR ECOL & CONTROL CTR,ALAMEDA,CA 94501. USN,MED RES INST,BETHESDA,MD. CTR DIS CONTROL & PREVENT,NATL CTR INFECT DIS,DIV VECTOR BORNE INFECT DIS,FT COLLINS,CO 80522. USN,DIS VECTOR ECOL & CONTROL CTR,JACKSONVILLE,FL. USN,ENVIRONM & PREVENT MED UNIT 7,NAPLES,ITALY. NR 26 TC 13 Z9 15 U1 0 U2 5 PU AMER SOC TROP MED & HYGIENE PI MCLEAN PA 8000 WESTPARK DRIVE SUITE 130, MCLEAN, VA 22101 SN 0002-9637 J9 AM J TROP MED HYG JI Am. J. Trop. Med. Hyg. PD JAN PY 1996 VL 54 IS 1 BP 49 EP 53 PG 5 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA TU827 UT WOS:A1996TU82700011 PM 8651369 ER PT B AU Solka, JL Wegman, EJ Poston, WL AF Solka, JL Wegman, EJ Poston, WL GP AMER STAT ASSOC TI A new order independent adaptive mixtures type estimator SO AMERICAN STATISTICAL ASSOCIATION - 1996 PROCEEDINGS OF THE STATISTICAL COMPUTING SECTION LA English DT Proceedings Paper CT Symposium of the Statistical-Computing-Section, at the Annual Meeting of the American-Statistical-Association CY AUG 04-08, 1996 CL CHICAGO, IL SP Amer Stat Assoc, Stat Comp Sect DE density estimation; adaptive mixtures AB This paper details the inner workings of a new order independent adaptive mixtures type estimator. This paper begins with a background discussion of the adaptive mixtures type estimation scheme along with a description of the new estimator. Subsequent sections present results obtained using Monte-Carlo simulations which compare the performance of the new estimator against standard AMDE. Some of the figures of merit that are used include number of terms produced and L-1 error. RP Solka, JL (reprint author), USN,CTR SURFACE WARFARE,DAHLGREN DIV,SYST RES & TECHNOL DEPT,DAHLGREN,VA 22448, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER STATISTICAL ASSOC PI ALEXANDRIA PA 1429 DUKE ST, ALEXANDRIA, VA 22314 BN 1-883276-40-3 PY 1996 BP 67 EP 72 PG 6 WC Statistics & Probability SC Mathematics GA BJ14Y UT WOS:A1996BJ14Y00013 ER PT J AU Tempelman, LA King, KD Anderson, GP Ligler, FS AF Tempelman, LA King, KD Anderson, GP Ligler, FS TI Quantitating staphylococcal enterotoxin B in diverse media using a portable fiber-optic biosensor SO ANALYTICAL BIOCHEMISTRY LA English DT Article ID SUPERANTIGENS; ANTIBODIES; AUREUS; FOODS; GENE AB A new, portable fiber-optic biosensor has been used to detect staphylococcal enterotoxin B, a causative agent of food poisoning, at levels as low as 0.5 ng/ml in buffer. The toxin (SEE) can also be detected and quantitated in other relevant media: human serum, urine, and aqueous extract of ham. The level of toxin, from 5 to 200 ng/ml, can be accurately predicted in these media by calibrating each fiber and by comparing results to a single standard curve based on toxin in buffer. The quantitative fluorescent sandwich immunoassay provides results in 45 min; qualitative results are provided in 15-20 min, Using a blender and a benchtop centrifuge, fast, simple aqueous extracts of contaminated ham samples were prepared and tested. Ham spiked with 5 or 40 mu g SEE per 100 g food resulted in biosensor readings indicative of 11 or 69% recovery of the toxin, respectively, Finally, the SEE assay is highly specific; SEA and SED give only 2-3% of the signal at 5000 ng/ml as SEE gives at 1000 ng/ml. This specific, sensitive assay for SEE on the portable fiberoptic biosensor permits easy monitoring of clinical samples or on-site analysis of suspect food samples. (C) 1996 Academic Press, Inc. C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. RP Tempelman, LA (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375, USA. RI Anderson, George/D-2461-2011 OI Anderson, George/0000-0001-7545-9893 NR 29 TC 81 Z9 87 U1 0 U2 7 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0003-2697 J9 ANAL BIOCHEM JI Anal. Biochem. PD JAN 1 PY 1996 VL 233 IS 1 BP 50 EP 57 DI 10.1006/abio.1996.0006 PG 8 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA TR136 UT WOS:A1996TR13600006 PM 8789146 ER PT J AU Kelso, JM AF Kelso, JM TI Allergy to penicillin and cephalosporins SO ANNALS OF ALLERGY ASTHMA & IMMUNOLOGY LA English DT Letter ID ANTIBIOTICS RP Kelso, JM (reprint author), USN,MED CTR,SAN DIEGO,CA 92152, USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU AMER COLL ALLERGY ASTHMA IMMUNOLOGY PI ARLINGTON HTS PA 85 WEST ALGONQUIN RD SUITE 550, ARLINGTON HTS, IL 60005 SN 1081-1206 J9 ANN ALLERG ASTHMA IM JI Ann. Allergy Asthma Immunol. PD JAN PY 1996 VL 76 IS 1 BP 61 EP 61 PG 1 WC Allergy; Immunology SC Allergy; Immunology GA TT892 UT WOS:A1996TT89200009 PM 8564630 ER PT J AU Churilla, AM Gottschalke, WA Liebovitch, LS Selector, LY Todorov, AT Yeandle, S AF Churilla, AM Gottschalke, WA Liebovitch, LS Selector, LY Todorov, AT Yeandle, S TI Membrane potential fluctuations of human T-lymphocytes have fractal characteristics of fractional Brownian motion SO ANNALS OF BIOMEDICAL ENGINEERING LA English DT Article DE long-term correlations; hurst rescaled range analysis; power spectrum; nonlinear; intracellular PD ID CHANNEL GATING KINETICS; ION CHANNELS; ACTIVATION AB The voltage across the cell membrane of human T-lymphocyte cell lines was recorded by the whole cell patch clamp technique. We studied how this voltage fluctuated in time and found that these fluctuations have fractal characteristics. We used the Hurst rescaled range analysis and the power spectrum of the increments of the voltage (sampled at 0.01-sec intervals) to characterize the time correlations in these voltage fluctuations. Although there was great variability in the shape of these fluctuations from different cells, they all could be represented by the same fractal form. This form displayed two different regimes. At short lags, the Hurst exponent H = 0.76 +/- 0.05 (SD) and, at long lags, H = 0.26 +/- 0.04 (SD). This finding indicated that, over short time intervals, the correlations were persistent (H > 0.5), that is, increases in the membrane voltage were more likely to be followed by additional increases. However, over long time intervals, the correlations were antipersistent (H < 0.5), that is, increases in the membrane voltage were more likely to be followed by voltage decreases. Within each time regime, the increments in the fluctuations had characteristics that were consistent with those of fractional Gaussian noise (fGn), and the membrane voltage as a function of time had characteristics that were consistent with those of fractional Brownian motion (fBm). C1 FLORIDA ATLANTIC UNIV, CTR COMPLEX SYST, BOCA RATON, FL 33431 USA. USN, MED RES INST, BETHESDA, MD USA. COLUMBIA UNIV, DEPT OPHTHALMOL, NEW YORK, NY 10027 USA. FU NEI NIH HHS [EY-6234] NR 32 TC 35 Z9 35 U1 0 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0090-6964 J9 ANN BIOMED ENG JI Ann. Biomed. Eng. PD JAN-FEB PY 1996 VL 24 IS 1 BP 99 EP 108 PG 10 WC Engineering, Biomedical SC Engineering GA TQ278 UT WOS:A1996TQ27800009 PM 8669722 ER PT J AU Randall, DA Bernstein, PE AF Randall, DA Bernstein, PE TI Epistaxis balloon catheter stabilization of zygomatic arch fractures SO ANNALS OF OTOLOGY RHINOLOGY AND LARYNGOLOGY LA English DT Article DE facial fracture; facial trauma; zygomatic fracture; zygomatic fracture repair AB Isolated zygomatic arch fractures represent about 10% of facial fractures. Most are easily reduced, but about 7% require fixation. Stabilization with plates, transcutaneous wiring, and various packing materials may involve additional morbidity and other drawbacks. A double balloon epistaxis catheter may be inserted beneath the arch fracture site and inflated for 5 to 7 days as a relatively simple, reliable alternative that involves minimal morbidity. C1 USN,MED CTR,DEPT OTOLARYNGOL,SAN DIEGO,CA 92134. KAISER PERMANENTE HOSP,DEPT OTOLARYNGOL,SAN DIEGO,CA. RP Randall, DA (reprint author), USN,MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. NR 6 TC 8 Z9 8 U1 0 U2 0 PU ANNALS PUBL CO PI ST LOUIS PA 4507 LACLEDE AVE, ST LOUIS, MO 63108 SN 0003-4894 J9 ANN OTO RHINOL LARYN JI Ann. Otol. Rhinol. Laryngol. PD JAN PY 1996 VL 105 IS 1 BP 68 EP 69 PG 2 WC Otorhinolaryngology SC Otorhinolaryngology GA TQ035 UT WOS:A1996TQ03500012 PM 8546429 ER PT J AU Brings, HA Murray, JD Light, JT Hemp, JR Ranbarger, KR AF Brings, HA Murray, JD Light, JT Hemp, JR Ranbarger, KR TI Internal iliac artery aneurysm following aortic reconstruction SO ANNALS OF VASCULAR SURGERY LA English DT Article AB Fewer than 100 internal iliac artery aneurysms have been reported in the English literature. Of these the incidence of true aneurysms occurring after aortic reconstruction is exceedingly low. A 73-year-old man presented with a 7 cm asymptomatic left internal iliac artery aneurysm 12 years after repair of an abdominal aortic aneurysm with a bifurcation graft. We report our experience with this patient along with a review of the literature and recommendations fdr aneurysm surveillance. C1 USN,DEPT CLIN INVEST,NAVAL MED CTR,SAN DIEGO,CA 92152. USN,NAVAL MED CTR,DEPT GEN SURG,DIV VASC SURG,SAN DIEGO,CA 92152. NR 15 TC 14 Z9 15 U1 0 U2 0 PU QUALITY MEDICAL PUBLISHING INC PI ST LOUIS PA 11970 BORMAN DR, STE 222, ST LOUIS, MO 63146 SN 0890-5096 J9 ANN VASC SURG JI Ann. Vasc. Surg. PD JAN PY 1996 VL 10 IS 1 BP 59 EP 62 DI 10.1007/BF02002343 PG 4 WC Surgery; Peripheral Vascular Disease SC Surgery; Cardiovascular System & Cardiology GA UC862 UT WOS:A1996UC86200011 PM 8688299 ER PT J AU Sarpkaya, T AF Sarpkaya, T TI Vorticity, free surface, and surfactants SO ANNUAL REVIEW OF FLUID MECHANICS LA English DT Review DE turbulence; surface signatures; coherent structures ID VISCOUS VORTEX PAIR; OPEN-CHANNEL FLOW; TURBULENCE STRUCTURE; TRAILING VORTICES; INTERFACE; DYNAMICS; SINGLE; ASCENT; RINGS; TUBES AB The central intent of this paper is to describe a number of analyses and experiments that could eventually serve to elucidate the physics of fluid mechanics phenomena such as the generation of whirls, the quasi-two-dimensionalization of turbulence near the free surface, and the reverse energy cascade at pure and contaminated interfaces. Discussed in some detail are the vorticity flux; surface-tension effects; basic equations and boundary conditions; the role of surfactants; topology of interfacial interactions; characteristics of connections, disconnections, and reconnections; a number of canonical hows (single and paired vortices, jets, and vortex rings); and the need for the development of prediction methods for turbulent flows in a region bounded by a free-surface, solid-fluid juncture boundary layer and the nonlinear interactions of shear flow wake turbulence with a free surface. RP USN, POSTGRAD SCH, MONTEREY, CA 93943 USA. NR 112 TC 94 Z9 96 U1 0 U2 15 PU ANNUAL REVIEWS PI PALO ALTO PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 USA SN 0066-4189 J9 ANNU REV FLUID MECH JI Annu. Rev. Fluid Mech. PY 1996 VL 28 BP 83 EP 128 PG 46 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA TR815 UT WOS:A1996TR81500004 ER PT B AU McGill, RA AF McGill, RA GP SOC PLAST ENGINEERS INC TI Choosing polymer coatings for gas and liquid chemical microsensors SO ANTEC '96: PLASTICS - RACING INTO THE FUTURE, VOLS I-III: VOL I: PROCESSING; VOL II: MATERIALS; VOL III: SPACIAL AREAS SE SOCIETY OF PLASTICS ENGINEERS TECHNICAL PAPERS LA English DT Proceedings Paper CT 54th Annual Technical Conference of the Society-of-Plastics-Engineers - Plastics: Racing into the Future (ANTEC 96) CY MAY 05-10, 1996 CL INDIANAPOLIS, IN SP Soc Plast Engineers DE polymer coating; linear solvation energy relationship; chemical sensor; hydrogen-bonding AB The sorbent properties of fourteen polymeric materials for use with chemical microsensors are examined by using a solvation equation that characterizes and quantifies the sorption properties of different analytes. The selectivity of polymers for different solute analytes is quantified and analyte sorption to the polymer from gas and liquid phases is examined. The polymers studied have been characterized using linear solvation energy relationships derived from inverse gas-liquid chromatography studies. RP McGill, RA (reprint author), USN,RES LAB,CODE 6170,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU SOC PLASTICS ENGINEERS PI BROOKFIELD CENTER PA 14 FAIRFIELD DR, BROOKFIELD CENTER, CT 06805 J9 SOC PLAST E PY 1996 VL 42 BP 2080 EP 2084 PG 5 WC Engineering, Chemical; Engineering, Mechanical; Materials Science, Multidisciplinary; Polymer Science SC Engineering; Materials Science; Polymer Science GA BH28W UT WOS:A1996BH28W00357 ER PT B AU Sellami, L Wong, K Newcomb, RW AF Sellami, L Wong, K Newcomb, RW GP IEEE TI Semi-state description of potassium and sodium channels in hair-cell-type circuits SO APCCAS '96 - IEEE ASIA PACIFIC CONFERENCE ON CIRCUITS AND SYSTEMS '96 LA English DT Proceedings Paper CT 1996 IEEE Asia Pacific Conference on Circuits and Systems CY NOV 18-21, 1996 CL SEOUL, SOUTH KOREA SP Minist Trade Ind & Energy, South Korea, Minist Informat & Commun, South Korea, Minist Sci & Technol, South Korea, Korea Inst Telemat & Electr, IEEE Circuits & Syst Soc, IEEE Korea Council AB Hair cells act as neural interfaces of sound signals and, therefore, circuit representations are important to signal processing systems based upon characteristics of the ear. Here a nonlinear bidirectional model of a hair-cell is presented. Also developed are a canonical semi-state description for its Potassium and Sodium channels, and circuits suitable for a transistorized hardware implementation. RP Sellami, L (reprint author), USN ACAD,EE DEPT,105 MARYLAND AVE,ANNAPOLIS,MD 21402, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3702-6 PY 1996 BP 417 EP 420 PG 4 WC Computer Science, Information Systems; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BH25U UT WOS:A1996BH25U00102 ER PT J AU Pace, MD AF Pace, MD TI EPR of C-60 thermal/photochemical reactions with polystyrene and polymethyl methacrylate SO APPLIED MAGNETIC RESONANCE LA English DT Article ID ELECTRON-SPIN-RESONANCE; PULSE-RADIOLYSIS; METHYL-METHACRYLATE; POLYMERIZATION; FULLERENES; STYRENE; REDOX AB Thermal and photochemical free radical reaction products of C-60 with polymethyl methacrylate (PMMA) and polystyrene (PS) in orthodichlorobenzene solution were detected by EPR (electron paramagnetic resonance). Thermal radicals (<100 degrees C) of C-60/PMMA and C-60/PS samples gave single line first-derivative EPR spectra with g = 2.0029. Ultraviolet photolysis of a C-60/PMMA solid phase sample gave two radical species; whereas, photolysis of a C-60/PS solid phase sample gave only one free radical. EPR signals were also recorded for UV and thermal C-60 reaction with free radical initiator, azobis(isobutyronitrile). RP Pace, MD (reprint author), USN,RES LAB,CODE 6120,WASHINGTON,DC 20375, USA. NR 14 TC 8 Z9 8 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0937-9347 J9 APPL MAGN RESON JI Appl. Magn. Reson. PY 1996 VL 11 IS 2 BP 253 EP 261 PG 9 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA VT067 UT WOS:A1996VT06700008 ER PT J AU Justus, BL Huston, AL Johnson, TL AF Justus, BL Huston, AL Johnson, TL TI Laser-heated radiation dosimetry using transparent thermoluminescent glass SO APPLIED PHYSICS LETTERS LA English DT Article ID STIMULATED THERMO-LUMINESCENCE AB Laser-stimulated thermoluminescence emission is reported from a novel transparent glass phosphor exposed to gamma-ray or ultraviolet radiation. Laser-heated radiation dosimetry measurements, using this effect, are reported. A unique laser heating method permits the stimulation of the thermoluminescence without significantly raising the bulk temperature of the glass. (C) 1996 American Institute of Physics. C1 USN,RES LAB,DIV COMMAND SUPPORT,WASHINGTON,DC 20375. RP Justus, BL (reprint author), USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375, USA. NR 8 TC 6 Z9 6 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JAN 1 PY 1996 VL 68 IS 1 BP 1 EP 3 DI 10.1063/1.116742 PG 3 WC Physics, Applied SC Physics GA TM847 UT WOS:A1996TM84700001 ER PT J AU Nisenoff, M AF Nisenoff, M TI Weight and power considerations for the design of a cryogenically cooled HTS electronic system SO APPLIED SUPERCONDUCTIVITY LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; SPACE EXPERIMENT HTSSE AB Much progress has been reported on the fabrication of high temperature superconducting (HTS) electronic devices, circuits and systems. In some of these reports, comparisons have been made between the electrical behavior of HTS components and their ''equivalent'' semiconductor counterparts. Unfortunately, in almost all cases, the comparisons have been-made at the device or circuit level. In an operational system, the HTS chip(s) must be mounted in an efficiently insulated cryogenic enclosure and integrated with a closed cycle cryogenic refrigerator (''cryocooler'') or an open-cycle dewar system. Therefore, to perform a meaningful comparison of an HTS system with a conventional (ambient temperature) one, the HTS system must include, in addition to the electronic chips, the cryogenic enclosure and cryogenic refrigeration system. In addition, the weight, volume, electrical input power and cool-down time for the cryogenic subsystem must also be taken into account in making such a comparison. That is, meaningful performance comparisons must be made at the system level. RP Nisenoff, M (reprint author), USN,RES LAB,DIV ELECT SCI & TECHNOL,WASHINGTON,DC 20375, USA. NR 7 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0964-1807 J9 APPL SUPERCOND JI Appl. Supercond. PD JAN-FEB PY 1996 VL 4 IS 1-2 BP 11 EP 16 DI 10.1016/0964-1807(96)00016-6 PG 6 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA VF648 UT WOS:A1996VF64800002 ER PT J AU Wu, C AF Wu, C TI Analysis of waste-heat thermoelectric power generators SO APPLIED THERMAL ENGINEERING LA English DT Article DE thermoelectric generator; waste heat; finite-rime thermodynamics AB A real thermoelectric power generator utilizing waste heat is proposed. The generator is treated as an external and internal irreversible heat engine. The specific power output of the generator is analyzed and compared with that of the Carnot, endoreversible and external reversible thermoelectric heat engines. RP Wu, C (reprint author), USN ACAD,DEPT MECH ENGN,ANNAPOLIS,MD 21402, USA. NR 5 TC 75 Z9 77 U1 1 U2 12 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-4311 J9 APPL THERM ENG JI Appl. Therm. Eng. PD JAN PY 1996 VL 16 IS 1 BP 63 EP 69 DI 10.1016/1359-4311(95)00014-5 PG 7 WC Thermodynamics; Energy & Fuels; Engineering, Mechanical; Mechanics SC Thermodynamics; Energy & Fuels; Engineering; Mechanics GA TT068 UT WOS:A1996TT06800006 ER PT J AU Brook, I Frazier, EH AF Brook, I Frazier, EH TI Aerobic and anaerobic microbiology of superficial suppurative thrombophlebitis SO ARCHIVES OF SURGERY LA English DT Article ID BACTEREMIA; DISEASE AB Objective: To study the aerobic and anaerobic microbiologic characteristics of superficial suppurative thrombophlebitis. Design: Retrospective review of microbiologic and clinical data. Setting: Navy Hospital in Bethesda, Md. Results: Sixty-one isolates, 36 aerobic and 25 anaerobic, were isolated from samples obtained from 42 patients. Aerobic bacteria only were found in 26 (62%) patients; anaerobic only, in 11 (26%); and mixed aerobic and anaerobic bacteria, in five (12%). The predominant aerobic bacteria were Staphylococcus aureus (n=9), Escherichia coli (n=7), Pseudomonas aeruginosa (n=4), and Klebsiella sp (n=3). The most frequently recovered anaerobic bacteria were Peptostreptococcus sp (n=8), Propionibacterium acnes (n=6), bacteroides fragilis group (n=5), Prevotella intermedia (n=3), and Fusobacterium nucleatum (n=3). Propionibacterium acnes and Peptostreptococcus sp were associated with cannula-related superficial suppurative thrombophlebitis; B fragilis and Enterobacteriaceae, with abdominal surgery or pathology; and S aureus and P aeruginosa and Citrobacter sp, with burns. Conclusion: These data illustrate the importance of anaerobic bacteria in superficial suppurative thrombophlebitis. C1 USN HOSP,DEPT PEDIAT,BETHESDA,MD. USN HOSP,DEPT INFECT DIS,BETHESDA,MD. NR 14 TC 11 Z9 11 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0004-0010 J9 ARCH SURG-CHICAGO JI Arch. Surg. PD JAN PY 1996 VL 131 IS 1 BP 95 EP 97 PG 3 WC Surgery SC Surgery GA TN794 UT WOS:A1996TN79400023 PM 8546586 ER PT S AU Fell, P AF Fell, P BE Alfriend, KT Ross, IM Misra, AK Peters, CF TI A preliminary study of satellite attitude determination for future LANDSAT spacecraft SO ASTRODYNAMICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Astrodynamics Conference CY FEB 14-17, 1995 CL HALIFAX, CANADA SP Amer Astron Soc, Amer Inst Aeronaut & Astronaut C1 USN,CTR SURFACE WARFARE,STRATEG & SPACE SYST DEPT,DAHLGREN DIV,DAHLGREN,VA 22448. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-407-9 J9 ADV ASTRONAUT SCI PY 1996 VL 90 BP 19 EP 28 PN 1&2 PG 10 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BF21S UT WOS:A1996BF21S00002 ER PT S AU Bang, HH Agrawal, BN AF Bang, HH Agrawal, BN BE Alfriend, KT Ross, IM Misra, AK Peters, CF TI Active vibration control of a deploying appendage using piezoceramic sensors and actuators SO ASTRODYNAMICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Meeting Abstract CT AAS/AIAA Astrodynamics Conference CY FEB 14-17, 1995 CL HALIFAX, CANADA SP Amer Astron Soc, Amer Inst Aeronaut & Astronaut C1 USN,POSTGRAD SCH,DEPT AERONAUT ASTRONAUT,MONTEREY,CA 93943. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-407-9 J9 ADV ASTRONAUT SCI PY 1996 VL 90 BP 359 EP 359 PN 1&2 PG 1 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BF21S UT WOS:A1996BF21S00022 ER PT S AU Alfriend, KT Barnds, WJ Coffey, SL Stuhrenberg, LN AF Alfriend, KT Barnds, WJ Coffey, SL Stuhrenberg, LN BE Alfriend, KT Ross, IM Misra, AK Peters, CF TI Attitude and orbit determination of a tethered satellite system SO ASTRODYNAMICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Astrodynamics Conference CY FEB 14-17, 1995 CL HALIFAX, CANADA SP Amer Astron Soc, Amer Inst Aeronaut & Astronaut C1 USN,POSTGRAD SCH,NAVY TENCAP CHAIR,SPACE SYST ACAD GRP,MONTEREY,CA 93943. NR 0 TC 4 Z9 4 U1 1 U2 1 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-407-9 J9 ADV ASTRONAUT SCI PY 1996 VL 90 BP 831 EP 848 PN 1&2 PG 18 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BF21S UT WOS:A1996BF21S00054 ER PT S AU Wolfe, SM Alfriend, KT Leonard, BS AF Wolfe, SM Alfriend, KT Leonard, BS BE Alfriend, KT Ross, IM Misra, AK Peters, CF TI A magnetic attitude control system for Sun pointing satellites SO ASTRODYNAMICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Astrodynamics Conference CY FEB 14-17, 1995 CL HALIFAX, CANADA SP Amer Astron Soc, Amer Inst Aeronaut & Astronaut C1 USN,POSTGRAD SCH,MONTEREY,CA 93943. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-407-9 J9 ADV ASTRONAUT SCI PY 1996 VL 90 BP 1047 EP 1064 PN 1&2 PG 18 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BF21S UT WOS:A1996BF21S00067 ER PT S AU Coffey, SL Neal, HL Segerman, AM Travisano, JJ AF Coffey, SL Neal, HL Segerman, AM Travisano, JJ BE Alfriend, KT Ross, IM Misra, AK Peters, CF TI An analytic orbit propagation program for satellite catalog maintenance SO ASTRODYNAMICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Astrodynamics Conference CY FEB 14-17, 1995 CL HALIFAX, CANADA SP Amer Astron Soc, Amer Inst Aeronaut & Astronaut C1 USN,RES LAB,MATH & ORBIT DYNAM SECT,WASHINGTON,DC 20375. NR 0 TC 5 Z9 5 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-407-9 J9 ADV ASTRONAUT SCI PY 1996 VL 90 BP 1869 EP 1892 PN 1&2 PG 24 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BF21S UT WOS:A1996BF21S00114 ER PT S AU Schumacher, PW Glover, RA AF Schumacher, PW Glover, RA BE Alfriend, KT Ross, IM Misra, AK Peters, CF TI Analytic orbit model for US naval space surveillance: An overview SO ASTRODYNAMICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Astrodynamics Conference CY FEB 14-17, 1995 CL HALIFAX, CANADA SP Amer Astron Soc, Amer Inst Aeronaut & Astronaut C1 USN,SPACE COMMAND,DAHLGREN,VA 22448. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-407-9 J9 ADV ASTRONAUT SCI PY 1996 VL 90 BP 1893 EP 1912 PN 1&2 PG 20 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BF21S UT WOS:A1996BF21S00115 ER PT J AU Dermer, CD Miller, JA Li, H AF Dermer, CD Miller, JA Li, H TI Stochastic particle acceleration near accreting black holes SO ASTROPHYSICAL JOURNAL LA English DT Article DE acceleration of particles; accretion, accretion disks; black hole physics; galaxies, active; radiation mechanisms, nonthermal ID ACTIVE GALACTIC NUCLEI; SOLAR-FLARES; RADIO-SOURCES; SPECTRA; ENERGY; GALAXIES; SCATTERING; TRANSPORT; PLASMA; MODEL AB We consider the stochastic acceleration of particles which results from resonant interactions with plasma waves in black hole magnetospheres. We calculate acceleration rates and escape timescales for protons and electrons resonating with Alfven waves, and for electrons resonating with whistlers. Assuming either a Kolmogorov or a Kraichnan wave spectrum, accretion at the Eddington limit, magnetic field strengths near equipartition, and turbulence energy densities similar to 10% of the total magnetic field energy density, we find that Alfven waves accelerate protons to Lorentz factors less than or similar to 10(4)-10(6) before they escape from the system. Acceleration of electrons by fast-mode and whistler waves can produce a nonthermal population of relativistic electrons whose maximum energy is determined by a competition with radiation losses. Particle energization and outflow is not possible at lower accretion rates, magnetic field strengths, or turbulence levels, owing to dominant Coulomb losses. Increases in the accretion luminosity relative to the Eddington luminosity can trigger particle acceleration out of the thermal background, and this mechanism could account for the differences between radio-quiet and radio-loud active galactic nuclei. Observations of outflowing radio-emitting components following transient X-ray events in Galactic X-ray novae and gamma-ray flares in blazars are in accord with this scenario. C1 UNIV ALABAMA, DEPT PHYS, HUNTSVILLE, AL 35899 USA. RICE UNIV, DEPT SPACE PHYS & ASTRON, HOUSTON, TX 77251 USA. RP USN, RES LAB, EO HULBURT CTR SPACE RES, CODE 7653, WASHINGTON, DC 20375 USA. NR 89 TC 61 Z9 61 U1 0 U2 0 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 1 PY 1996 VL 456 IS 1 BP 106 EP 118 DI 10.1086/176631 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TM837 UT WOS:A1996TM83700009 ER PT J AU Zepka, A Cordes, JM Wasserman, I AF Zepka, A Cordes, JM Wasserman, I TI Discovery of three radio pulsars from an X-ray-selected sample SO ASTROPHYSICAL JOURNAL LA English DT Article DE pulsars, individual (PSR JO631+10, PSR J1843+20, PSR J1908+04); radio continuum, stars; X-rays, stars ID NEBULA; STAR AB We report the discovery of three radio pulsars (PSR J0631+10, J1843+20, and J1908+0457) in a search targeted at Einstein IPC X-ray sources. The fastest, J0631+10, has a period of 0.288 s and high period derivative (P = 104 x 10(-15) s s(-1)) corresponding to a spin-down age of only 43 kyr. From 1400 MHz to 2380 MHz the radio spectrum is nearly flat, and the pulse profile is very symmetrical with four narrow components and shows a high degree of linear polarization (>70%). In contrast, the 430 MHz pulse profile is significantly broader and depolarized, which we argue is because of propagation effects. Besides the Einstein detection, we also found a faint X-ray source at the pulsar's location in a ROSAT PSPC exposure. A search for X-ray pulsations was not possible since fewer than 50 net counts are available from either data set. Because both X-ray detections fall in the shadow of their respective detector supporting ribs, the uncertainties in the spectral analysis and X-ray position are rather large, making the separations between pulsar and X-ray source (similar to 1') still consistent with an association between the two. The dispersion measure (DM = 125.3 pc cm(-3)) is the largest of any known pulsar in the Galactic anticenter and is likely to be due in part to an increase in the electron density associated with the star-forming region 3 Mon in the pulsar's foreground. Our analysis suggests that J0631+10 is interacting with (and possibly embedded inside) the dark cloud LDN 1605. In search for confirmation of its high-energy emission, we folded available Compton Gamma-Ray Observatory EGRET data at the pulsar's position and period, finding gamma-ray modulations that have less than 1% probability of being generated by noise. The two other pulsars, J1843+20 and J1908+0457, are also close to their respective X-ray sources (separation <2'), but their small spin-down luminosities and large distances render them unlikely X-ray emitters. C1 USN,RES LABS,WASHINGTON,DC 20375. RP Zepka, A (reprint author), CORNELL UNIV,DEPT ASTRON,ITHACA,NY 14853, USA. NR 30 TC 24 Z9 24 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 1 PY 1996 VL 456 IS 1 BP 305 EP 315 DI 10.1086/176651 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TM837 UT WOS:A1996TM83700029 ER PT B AU Foster, RS Edelstein, J Bowyer, S AF Foster, RS Edelstein, J Bowyer, S BE Bowyer, S Malina, RF TI Extreme ultraviolet emission from neutron stars SO ASTROPHYSICS IN THE EXTREME ULTRAVIOLET LA English DT Proceedings Paper CT 152nd IAU Colloquium on Astrophysics in the Extreme Ultraviolet CY MAR 27-30, 1995 CL BERKELEY, CA SP IAU C1 USN,RES LAB,REMOTE SENSING DIV,WASHINGTON,DC 20375. NR 0 TC 1 Z9 1 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3908-8 PY 1996 BP 437 EP 442 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE98L UT WOS:A1996BE98L00070 ER PT B AU Doschek, GA AF Doschek, GA BE Bowyer, S Malina, RF TI Recent advances in EUV solar astronomy SO ASTROPHYSICS IN THE EXTREME ULTRAVIOLET LA English DT Proceedings Paper CT 152nd IAU Colloquium on Astrophysics in the Extreme Ultraviolet CY MAR 27-30, 1995 CL BERKELEY, CA SP IAU C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3908-8 PY 1996 BP 503 EP 510 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE98L UT WOS:A1996BE98L00081 ER PT S AU Mostovych, AN Chan, LY Kearney, KJ AF Mostovych, AN Chan, LY Kearney, KJ BE Osterheld, AL Goldstein, WH TI New methods for probing the opacity and optical properties of dense low-temperature plasmas SO ATOMIC PROCESSES IN PLASMAS: TENTH TOPICAL CONFERENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 10th American-Physical-Society Topical Conference on Atomic Processes in Plasmas CY JAN 14-18, 1996 CL SAN FRANCISCO, CA SP Amer Phys Soc, US DOE, Off Fus Energy, US DOE, Off Energy Res, Lawrence Livermore Natl Lab, Phys & Space Technol Directorate C1 USN,RES LAB,DIV PLASMA PHYS,LASER PLASMA BRANCH,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-552-6 J9 AIP CONF PROC PY 1996 IS 381 BP 279 EP 286 PG 8 WC Physics, Fluids & Plasmas SC Physics GA BG55C UT WOS:A1996BG55C00029 ER PT B AU Gaunaurd, GC Brill, D Huang, H Moore, PWB Strifors, HC AF Gaunaurd, GC Brill, D Huang, H Moore, PWB Strifors, HC BE Sadjadi, FA TI Understanding the echo-clues used by dolphins to remotely identify the target characteristics of submerged elastic shells SO AUTOMATIC OBJECT RECOGNITION VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 6th International Conference on Automatic Object Recognition CY APR 09-10, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2137-5 J9 P SOC PHOTO-OPT INS PY 1996 VL 2756 BP 192 EP 204 DI 10.1117/12.241147 PG 13 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BF76S UT WOS:A1996BF76S00019 ER PT B AU Wallet, BC Marchette, DJ Solka, JL AF Wallet, BC Marchette, DJ Solka, JL BE Sadjadi, FA TI A matrix representation for genetic algorithms SO AUTOMATIC OBJECT RECOGNITION VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 6th International Conference on Automatic Object Recognition CY APR 09-10, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE genetic algorithms; rich data structures; matrix representation; crossover; prisoner's dilemma; spatial optimization; image processing; random fields; image reconstruction C1 USN,CTR SURFACE WARFARE,DAHLGREN,VA 22448. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2137-5 J9 P SOC PHOTO-OPT INS PY 1996 VL 2756 BP 206 EP 214 DI 10.1117/12.241153 PG 9 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BF76S UT WOS:A1996BF76S00020 ER PT J AU Marco, DB Healey, AJ McGhee, RB AF Marco, DB Healey, AJ McGhee, RB TI Autonomous underwater vehicles: Hybrid control of mission and motion SO AUTONOMOUS ROBOTS LA English DT Article; Proceedings Paper CT 1995 IEEE International Conference on Robotics and Automation - Autonomous Underwater Robots CY 1995 CL NAGOYA, JAPAN SP IEEE DE autonomous; hybrid control; Prolog; petri nets; underwater vehicles; reactive; sonar; mission; coordination AB This paper provides an experimental implementation and verification of a hybrid (mixed discrete state/continuous state) controller for semi-autonomous and autonomous underwater vehicles in which the missions imply multiple task robot behavior. An overview of some of the missions being considered for this rapidly developing technology is mentioned including environmental monitoring, underwater inspection, geological survey as well as military missions in mine countermeasures. The functionalities required of such vehicles and their relation to 'intelligent control' technology is discussed. In particular, the use of Prolog as a computer language for the specification of the discrete event system (DES) aspects of the mission control is proposed. The connections between a Prolog specification and the more common Petri Net graphical representation of a DES are made. Links are made between activation commands, transitioning signals, and the continuous state dynamic control system (DCS) responsible for vehicle stabilization. Details are given of the NPS Phoenix vehicle implementation at the present time, together with experimental validation of the concepts outlined using a simplified example mission. The paper ends with a listing of questions and concerns for the evaluation of software controllers. A list of references is given for readers interested in this subject. RP Marco, DB (reprint author), USN,POSTGRAD SCH,AUTONOMOUS UNDERWATER VEHICLE LAB,700 DYER RD,MONTEREY,CA 93943, USA. NR 26 TC 24 Z9 25 U1 0 U2 3 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0929-5593 J9 AUTON ROBOT JI Auton. Robot. PY 1996 VL 3 IS 2-3 BP 169 EP 186 DI 10.1007/BF00141153 PG 18 WC Computer Science, Artificial Intelligence; Robotics SC Computer Science; Robotics GA VV725 UT WOS:A1996VV72500006 ER PT J AU McMillan, S Orin, DE McGhee, RB AF McMillan, S Orin, DE McGhee, RB TI A computational framework for simulation of underwater robotic vehicle systems SO AUTONOMOUS ROBOTS LA English DT Article; Proceedings Paper CT 1995 IEEE International Conference on Robotics and Automation - Autonomous Underwater Robots CY 1995 CL NAGOYA, JAPAN SP IEEE DE underwater robotics; hydrodynamics; simulation; articulated mechanisms; tree topologies; object-oriented design ID EFFICIENT DYNAMIC SIMULATION; ARTICULATED-BODY INERTIAS; ENVIRONMENT; MANIPULATOR AB This paper presents a computational framework for efficiently simulating the dynamics and hydrodynamics of Underwater Robotic Vehicle (URV) systems. Through the use of object-oriented mechanisms, a very general yet efficient version of the Articulated-Body (AB) algorithm has been implemented. An efficient solution se to branching within chains is developed in the paper so that the algorithm can be used to compute the dynamics for the entire class of open-chain, tree-structured mechanisms. By including compliant contacts with the environment, most closed-chain systems can also be modeled. URV systems with an extended set of topologies can be simulated including proposed underwater walking machines with intra-body powered articulations. Using the encapsulation inherent in C++, the hydrodynamics code has been confined to a single class, thereby explicitly defining this framework and providing an environment for readily implementing desired hydrodynamics algorithms. Resulting simulations are very efficient and can be used in a number of applications both in the development and use of URV systems. C1 OHIO STATE UNIV,DEPT ELECT ENGN,COLUMBUS,OH 43210. USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943. RP McMillan, S (reprint author), HIGH TECHSPLANAT INC,6001 MONTROSE RD,ROCKVILLE,MD 20852, USA. NR 35 TC 12 Z9 13 U1 0 U2 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0929-5593 J9 AUTON ROBOT JI Auton. Robot. PY 1996 VL 3 IS 2-3 BP 253 EP 268 DI 10.1007/BF00141158 PG 16 WC Computer Science, Artificial Intelligence; Robotics SC Computer Science; Robotics GA VV725 UT WOS:A1996VV72500011 ER PT B AU Deffler, J Licci, S AF Deffler, J Licci, S GP IEEE TI System Synthesis Models as a standard DoD tool for automatic test system analysis, selection, and development SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 USN,AIR WARFARE CTR,DIV AIRCRAFT,CASS IMPLEMENTAT TEAM,LAKEHURST,NJ 08733. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 1 EP 7 PG 7 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00001 ER PT B AU Scott, HH AF Scott, HH GP IEEE TI Interactive on-line manufacturing and repair system (io-MARS) SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 USN,CTR SURFACE WARFARE,CRANE DIV,CRANE,IN 47522. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 40 EP 45 DI 10.1109/AUTEST.1996.547675 PG 6 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00007 ER PT B AU Molnar, JA AF Molnar, JA GP IEEE TI Conversion of MIL-T-28800 to a performance specification SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 USN,RES LAB,SYST INSTRUMENTAT & INTEGRAT SECT,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 266 EP 271 DI 10.1109/AUTEST.1996.547708 PG 6 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00040 ER PT B AU Liguori, F AF Liguori, F GP IEEE TI New approaches to weapon system testing or ''back to the future'' SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 USN,AIR WAREFARE CTR,DIV AIRCRAFT,LAKEHURST,NJ 08733. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 314 EP 317 PG 4 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00048 ER PT J AU Shappell, SA Wiegmann, DA AF Shappell, SA Wiegmann, DA TI US naval aviation mishaps, 1977-92: Differences between single- and dual-piloted aircraft SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article AB The present study examined U.S. Naval aircraft mishap trends between January 1977 and December 1992 using all Class A, B, and C mishaps. Results of this investigation revealed that mishaps attributable to both human error and mechanical/environmental factors have declined steadily over the past 16 years, although mishaps attributed to human error have declined at a much slower rate. For those mishaps attributed to human error, differences were observed between single and dual-piloted aircraft when phase-of-flight (takeoff, in-flight, landing) and time-of-day were evaluated. For single-piloted aircraft, in-flight mishaps constituted the highest proportion of mishaps during the day (>55%), while landing mishaps constituted the highest proportion of mishaps during the evening and night (43-65%). For dual-piloted aircraft, no consistent variation was evident for phase-of-flight and time-of-day. In-flight (approx. 55%) mishaps constituted the highest proportion of mishaps across all times of day, followed by landing (approx. 35%), and takeoff (approx. 10%) mishaps. These data support focused rather than global investigations of aviation mishaps. C1 USN,AEROSP MED RES LAB,PENSACOLA,FL. RP Shappell, SA (reprint author), USN AF,ATLANTIC FLEET,LCDR SCOTT SHAPPEL,CODE N02M3,1279 FRANKLIN ST,NORFOLK,VA 23511, USA. NR 9 TC 21 Z9 21 U1 1 U2 3 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD JAN PY 1996 VL 67 IS 1 BP 65 EP 69 PG 5 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TP715 UT WOS:A1996TP71500015 PM 8929207 ER PT J AU Haslbeck, EG Kavanagh, CJ Shin, HW Banta, WC Song, P Loeb, GI AF Haslbeck, EG Kavanagh, CJ Shin, HW Banta, WC Song, P Loeb, GI TI Minimum effective release rate of antifoulants .2. Measurement of the effect of TBT and zosteric acid on hard fouling SO BIOFOULING LA English DT Article; Proceedings Paper CT 9th International Congress on Marine Corrosion and Fouling CY JUL 17-21, 1995 CL UNIV PORTSMOUTH, PORTSMOUTH, ENGLAND SP Comite Int Rech Preservat Mat Millieu Marin HO UNIV PORTSMOUTH DE antifoulant; marine fouling; release rate; dose response; hard fouling; biofilms AB A membrane perfusion device for determining minimum effective release rates (MERR) of antifouling agents is described. The technique is applied to known biocidal agents and to a new prospective natural antifouling agent. This method allows controlled and reproducible release rates to be achieved independent of water chemistry and flow near the immersed surface. Unlike constant concentration methods, the device acts similarly to a painted surface, allowing establishment of diffusion gradients; thereby allowing fouling organisms to exhibit natural chemotactic responses to the released toxin. The method was applied at four remote sites to natural populations of fouling organisms. The MERRs of known (tributyltin chloride, dibutyltin chloride, and cupric ion) and experimental (zosteric acid) AF agents were determined. The effective release rates of cupric ion and organotin were consistent with immersed panel data and held observation of ship hulls, while the effective rate of zosteric acid, determined at two test sites, was much higher. Such data provide coatings formulators with valuable information relating to the suitability of an agent for AF coating use. C1 USN,CTR SURFACE WARFARE,CARDEROCK DIV,ANNAPOLIS,MD 21401. FLORIDA INST TECHNOL,DEPT OCEANOG & OCEAN ENGN,MELBOURNE,FL 32901. UNIV HAWAII,DEPT BOT,HONOLULU,HI 96822. AMERICAN UNIV,DEPT BIOL,WASHINGTON,DC 20016. NR 8 TC 12 Z9 12 U1 0 U2 9 PU HARWOOD ACAD PUBL GMBH PI READING PA C/O STBS LTD, PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0892-7014 J9 BIOFOULING JI Biofouling PY 1996 VL 10 IS 1-3 BP 175 EP 186 PG 12 WC Biotechnology & Applied Microbiology; Marine & Freshwater Biology SC Biotechnology & Applied Microbiology; Marine & Freshwater Biology GA VV773 UT WOS:A1996VV77300013 PM 22115110 ER PT S AU Fry, EA Sears, S Arnelle, D Byrns, RE Ignarro, LJ Stamler, JS Gaston, B AF Fry, EA Sears, S Arnelle, D Byrns, RE Ignarro, LJ Stamler, JS Gaston, B BE Moncada, S Stamler, J Gross, S Higgs, EA TI Umbilical arterial S-nitrosothiol concentration as a marker for normal human perinatal circulatory transition. SO BIOLOGY OF NITRIC OXIDE, PT 5 SE PORTLAND PRESS PROCEEDINGS LA English DT Proceedings Paper CT 4th International Meeting on the Biology of Nitric Oxide CY SEP, 1995 CL AMELIA ISL, FL C1 USN,MED CTR,DEPT PEDIAT,SAN DIEGO,CA 92134. NR 0 TC 0 Z9 0 U1 0 U2 1 PU PORTLAND PRESS LTD PI LONDON PA 59 PORTLAND PL, LONDON, ENGLAND W1N 3AJ SN 0966-4068 BN 1-85578-102-6 J9 PORTL PR P PY 1996 VL 10 BP 236 EP 236 PG 1 WC Biochemistry & Molecular Biology; Cell Biology; Chemistry, Medicinal; Pharmacology & Pharmacy; Physiology SC Biochemistry & Molecular Biology; Cell Biology; Pharmacology & Pharmacy; Physiology GA BE95M UT WOS:A1996BE95M00231 ER PT S AU Woods, J Sears, S Hunt, J Walton, S Ling, CY Strunc, M Gaston, B AF Woods, J Sears, S Hunt, J Walton, S Ling, CY Strunc, M Gaston, B BE Moncada, S Stamler, J Gross, S Higgs, EA TI Nitric oxide production during tidal breathing: An effort-independent assay. SO BIOLOGY OF NITRIC OXIDE, PT 5 SE PORTLAND PRESS PROCEEDINGS LA English DT Proceedings Paper CT 4th International Meeting on the Biology of Nitric Oxide CY SEP, 1995 CL AMELIA ISL, FL C1 USN,MED CTR,DEPT PEDIAT,DIV PULM,SAN DIEGO,CA 92134. NR 0 TC 0 Z9 0 U1 0 U2 1 PU PORTLAND PRESS LTD PI LONDON PA 59 PORTLAND PL, LONDON, ENGLAND W1N 3AJ SN 0966-4068 BN 1-85578-102-6 J9 PORTL PR P PY 1996 VL 10 BP 316 EP 316 PG 1 WC Biochemistry & Molecular Biology; Cell Biology; Chemistry, Medicinal; Pharmacology & Pharmacy; Physiology SC Biochemistry & Molecular Biology; Cell Biology; Pharmacology & Pharmacy; Physiology GA BE95M UT WOS:A1996BE95M00311 ER PT S AU Hunt, J Byrns, RE Ignarro, LJ Gaston, B AF Hunt, J Byrns, RE Ignarro, LJ Gaston, B BE Moncada, S Stamler, J Gross, S Higgs, EA TI Home measurement of airway condensate nitrite as a marker for asthmatic airway inflammation. SO BIOLOGY OF NITRIC OXIDE, PT 5 SE PORTLAND PRESS PROCEEDINGS LA English DT Proceedings Paper CT 4th International Meeting on the Biology of Nitric Oxide CY SEP, 1995 CL AMELIA ISL, FL C1 USN,MED CTR,DEPT PEDIAT,SAN DIEGO,CA 92134. NR 0 TC 1 Z9 1 U1 0 U2 1 PU PORTLAND PRESS LTD PI LONDON PA 59 PORTLAND PL, LONDON, ENGLAND W1N 3AJ SN 0966-4068 BN 1-85578-102-6 J9 PORTL PR P PY 1996 VL 10 BP 317 EP 317 PG 1 WC Biochemistry & Molecular Biology; Cell Biology; Chemistry, Medicinal; Pharmacology & Pharmacy; Physiology SC Biochemistry & Molecular Biology; Cell Biology; Pharmacology & Pharmacy; Physiology GA BE95M UT WOS:A1996BE95M00312 ER PT S AU VonTersch, RL Secundo, F Phillips, RS Newton, MG AF VonTersch, RL Secundo, F Phillips, RS Newton, MG BE Ojima, I McCarthy, JR Welch, JT TI Preparation of fluorinated amino acids with tyrosine phenol lyase - Effects of fluorination on reaction kinetics and mechanism of tyrosine phenol lyase and tyrosine protein kinase Csk SO BIOMEDICAL FRONTIERS OF FLUORINE CHEMISTRY SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Fluro-Amino Acids and Peptides in Medicinal Chemistry / Symposium on Fluorine in Drug Design, at the 210 ACS National Meeting CY 1995 CL CHICAGO, IL SP Amer Chem Soc, Div Fluorine Chem, Amer Chem Soc, Div Medicinal Chem ID SITE-DIRECTED MUTAGENESIS; TRYPTOPHAN INDOLE-LYASE; CITROBACTER-FREUNDII; INACTIVATION; INTERMEDIUS; COMPLEXES; ANALOGS; BINDING AB Fluorinated analogues of L-tyrosine were synthesized enzymatically from the corresponding fluorinated phenols and ammonium pyruvate using tyrosine phenol-lyase. The isolated yields ranged from 0.5-2.8 g per liter (10-42% based on phenol added). The structure of 2,3,6-trifluoro-L-tyrosine hydrochloride hydrate was determined by x-ray crystallography. The fluorinated tyrosines are good substrates for the beta-elimination reaction catalysed by tyrosine phenol-lyase, except for 3,5-difluoro and the trifluorotyrosines. Fluorine at the 3-position increases the steady-state concentration of quinonoid intermediate absorbing at 500 nm compared to L-tyrosine, while fluorine at the 2-position dramatically decreases the intensity of the 500 nm absorbance peak. Reaction of tyrosine phenol-lyase with beta,beta,beta-trifluoroalanine and fluorophenols generates transient ring-fluorinated beta,beta-difluorotyrosines. 2,3,5-Trifluoro-L-tyrosine synthesized using tyrosine phenol-lyase was incorporated into a peptide substrate for tyrosine protein kinase Csk, and the resultant fluorinated peptide was found to be a good substrate for phosphorylation, suggesting that general base catalysis with early deprotonation is not involved in the reaction mechanism. C1 CNR,IST CHIM ORMONI,I-20131 MILAN,ITALY. UNIV GEORGIA,DEPT CHEM,ATHENS,GA 30602. UNIV GEORGIA,DEPT BIOCHEM & MOL BIOL,ATHENS,GA 30602. RP VonTersch, RL (reprint author), USN ACAD,DEPT CHEM,ANNAPOLIS,MD 21402, USA. RI Secundo, Francesco/G-3568-2013; OI Secundo, Francesco/0000-0002-7052-9634; Phillips, Robert/0000-0001-8710-562X NR 18 TC 6 Z9 6 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 SN 0097-6156 BN 0-8412-3442-6 J9 ACS SYM SER PY 1996 VL 639 BP 95 EP 104 PG 10 WC Chemistry, Medicinal; Chemistry, Multidisciplinary; Chemistry, Inorganic & Nuclear SC Pharmacology & Pharmacy; Chemistry GA BG35X UT WOS:A1996BG35X00007 ER PT B AU Wadkins, RM Golden, JP Ligler, FS AF Wadkins, RM Golden, JP Ligler, FS BE Lieberman, RA Podbielska, H VoDinh, T TI Simultaneous measurement of Cy5.5-labeled capture antibodies and Cy5-labeled antigens in a fiber optic biosensor: Photobleaching and resonance energy transfer effects during fiber regeneration SO BIOMEDICAL SENSING, IMAGING, AND TRACKING TECHNOLOGIES I SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Biomedical Sensing, Imaging, and Tracking Technologies I CY JAN 29-31, 1996 CL SAN JOSE, CA SP Soc Photo Opt Instrumentat Engineers DE fiber optic; biosensor; fluorescence; cyanine; antibody; evanescent wave; calibration C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2050-6 J9 P SOC PHOTO-OPT INS PY 1996 VL 2676 BP 148 EP 155 DI 10.1117/12.238793 PG 8 WC Engineering, Biomedical; Optics SC Engineering; Optics GA BF60S UT WOS:A1996BF60S00017 ER PT J AU Karle, IL AF Karle, IL TI Untitled - Foreword SO BIOPOLYMERS LA English DT Editorial Material RP Karle, IL (reprint author), USN,RES LAB,STRUCT MATTER LAB,CODE 6030,WASHINGTON,DC 20375, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0006-3525 J9 BIOPOLYMERS JI Biopolymers PY 1996 VL 40 IS 1 BP 1 EP 1 DI 10.1002/(SICI)1097-0282(1996)40:1<1::AID-BIP1>3.0.CO;2-# PG 1 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA TM895 UT WOS:A1996TM89500001 ER PT J AU Deschamps, JR George, C FlippenAnderson, JL AF Deschamps, JR George, C FlippenAnderson, JL TI Structural studies of opioid peptides: A review of recent progress in x-ray diffraction studies SO BIOPOLYMERS LA English DT Article ID RECEPTOR SELECTIVITY; CRYSTAL-STRUCTURES; ENKEPHALIN ANALOG; BINDING-SITES; BETA-SHEET; CONFORMATION; MORPHINE; AFFINITY; POTENT; MU AB The solid state structures of many opioid peptide agonists have been elucidated by x-ray diffraction analysis. Recently, the first structure of an opioid peptide antagonist has been determined. Theoretically, linear peptides can have many different backbone conformations, yet early x-ray studies (1983-1987) on enkephalin and its analogues showed only two different backbone conformations: extended and single beta-bend. In 1989 enkephalin was observed in a third conformation, a double beta-bend. Since that time diffraction studies have been completed on the rationally designed linear opioid peptide agonists DTLET (Tyr-D-Thr-Gly-Phe-Leu-Thr) and DADLE (D-Ala(2),D-Leu(5)-enkephalin) as well as on several cyclic enkephalin analogues including DPDPE (Tyr-[D-Pen-Gly-Phe-D-Pen]) and JOM-13 (Tyr-[D-Cys-Phe-D-Pen]). The most recent review of the x-ray studies on this class of compounds was written in 1988. This paper will update that review to include the results of studies completed since that time. (C) 1996 John Wiley & Sons, Inc. RP Deschamps, JR (reprint author), USN,RES LAB,STRUCT MATTER LAB,CODE 6030,WASHINGTON,DC 20375, USA. OI Deschamps, Jeffrey/0000-0001-5845-0010 NR 59 TC 47 Z9 47 U1 1 U2 7 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0006-3525 J9 BIOPOLYMERS JI Biopolymers PY 1996 VL 40 IS 1 BP 121 EP 139 DI 10.1002/bip.360400102 PG 19 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA TM895 UT WOS:A1996TM89500006 PM 8541444 ER PT J AU Karle, IL AF Karle, IL TI Flexibility in peptide molecules and restraints imposed by hydrogen bonds, the AiB residue, and core inserts SO BIOPOLYMERS LA English DT Article ID ALPHA-AMINOISOBUTYRIC-ACID; SYNTHETIC PROTEIN MIMICS; X-RAY-DIFFRACTION; CRYSTAL-STRUCTURE; MODULAR DESIGN; LINEAR OLIGOPEPTIDES; PARALLEL PACKING; LEUCINE ZIPPER; ION CHANNELS; AMINO-ACIDS AB The first segments of this article review some of the early crystal structure determinations of beta-bends, gamma-bends, large conformational changes in cyclic peptides upon complexation with metal ions, and both the stability and drastic change in conformation as a function of the solvent used for growing crystals. More recent structure analyses have concerned helical peptides containing the Aib and/or Dpg residues and associated conformational problems such as 3(10)-/alpha-helix transitions, helix aberrations, reversals, severe curving of the helix, unfolding, and hydration of backbone. Ion channels occurring in three crystal forms of zervamicin and possible ion transport and gating mechanisms are described. Finally, hydrogen bonding patterns are presented in supramolecular assemblies of retropeptides with core inserts consisting of oxalyl, adipoyl, suberoyl and polymethylene moieties. (C) 1996 John Wiley & Sons, Inc. RP Karle, IL (reprint author), USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375, USA. FU NIGMS NIH HHS [GM30902] NR 83 TC 83 Z9 83 U1 0 U2 2 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0006-3525 J9 BIOPOLYMERS JI Biopolymers PY 1996 VL 40 IS 1 BP 157 EP 180 DI 10.1002/(SICI)1097-0282(1996)40:1<157::AID-BIP7>3.0.CO;2-V PG 24 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA TM895 UT WOS:A1996TM89500008 PM 8541446 ER PT J AU Yu, H Kusterbeck, AW Hale, MJ Ligler, FS Whelan, JP AF Yu, H Kusterbeck, AW Hale, MJ Ligler, FS Whelan, JP TI Use of the USDT flow immunosensor for quantitation of benzoylecgonine in urine SO BIOSENSORS & BIOELECTRONICS LA English DT Article; Proceedings Paper CT 4th World Congress on Biosensors CY 1996 CL BANGKOK, THAILAND DE biosensor; immunosensor; benzolegonine; urine; cocaine; flow ID DRUGS; ABUSE; IMMUNOASSAY; BINDING; ASSAY AB The flow immunosensor works on a principle somewhat distinct from other immunoassay systems in that it performs a displacement immunoassay. Antibody-coated matrices are saturated with fluorescently labeled benzoylecgonine (BE), which is released and measured in the presence of BE-containing urine and measured downstream from the matrix. The same antibody matrix can be used for many samples. A flow immunosensor instrument, built by US Drug Testing, Inc., has recently received 'Premarket Notification' (510(K)) from the Food and Drug Administration (FDA) to screen urine for the presence of the cocaine metabolite BE. The performance of the flow immunosensor for screening BE in urine was validated by comparison with results of a blind study using the Syva EMIT, the Abbott TDx and gas chromatography-mass spectroscopy (CC-MS). Potentially interfering drugs were also spiked into urine and evaluated using the flow immunosensor. While the FDA approval is for determining whether the BE concentration is above or below the 300 mu g/l cutoff recommended by the National Institute of Drug Abuse, we have also shown that the flow immunosensor can be adapted to produce quantitative determinations of the amount of BE in the urine samples. The reliability of the quantitation was confirmed by testing 100 urine samples containing unknown amounts of BE using the flow immunosensor, CC-MS and the Abbott TDx system. Comparison of quantitative data obtained using the immunosensor and CC-MS showed a 97% correlation, compared with a much lower value for data from the TDx and CC-MS. C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. GEORGETOWN UNIV,MED CTR,DEPT BIOCHEM & MOLEC BIOL,WASHINGTON,DC 20007. US DRUG TESTING INC,RANCHO CUCAMONGA,CA 91730. NR 19 TC 18 Z9 18 U1 0 U2 3 PU ELSEVIER ADVANCED TECHNOLOGY PI OXFORD PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0956-5663 J9 BIOSENS BIOELECTRON JI Biosens. Bioelectron. PY 1996 VL 11 IS 8 BP 725 EP 734 DI 10.1016/0956-5663(96)85923-9 PG 10 WC Biophysics; Biotechnology & Applied Microbiology; Chemistry, Analytical; Electrochemistry; Nanoscience & Nanotechnology SC Biophysics; Biotechnology & Applied Microbiology; Chemistry; Electrochemistry; Science & Technology - Other Topics GA UN103 UT WOS:A1996UN10300005 PM 8639280 ER PT B AU Park, YS AF Park, YS BE Yoshikawa, A Kishino, K Kobayashi, M Yasuda, T TI Future prospects in blue/UV short wavelength optoelectronics devices SO BLUE LASER AND LIGHT EMITTING DIODES LA English DT Proceedings Paper CT International Symposium on Blue Laser and Light Emitting Diodes CY MAR 05-07, 1996 CL CHIBA UNIV, CHIBA, JAPAN SP Chiba Univ HO CHIBA UNIV C1 OFF NAVAL RES,ARLINGTON,VA 22217. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I O S PRESS PI AMSTERDAM PA VAN DIEMENSTRAAT 94, 1013 CN AMSTERDAM, NETHERLANDS BN 90-5199-269-6 PY 1996 BP 289 EP 294 PG 6 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA BG02X UT WOS:A1996BG02X00058 ER PT B AU DeGiorgi, VG Thomas, ED Lucas, KE Kee, A AF DeGiorgi, VG Thomas, ED Lucas, KE Kee, A BE Ertekin, RC Brebbia, CA Tanaka, M Shaw, R TI A combined design methodology for impressed current cathodic protection systems SO BOUNDARY ELEMENT TECHNOLOGY XI LA English DT Proceedings Paper CT 11th International Conference on Boundary Element Technology (BETECH 96) CY 1996 CL HI SP Univ Hawaii, Shinshu Univ, Japan, Wessex Inst Technol C1 USN,RES LAB,MECH MAT BRANCH,WASHINGTON,DC 20375. NR 0 TC 1 Z9 1 U1 0 U2 0 PU COMPUTATIONAL MECHANICS PUBLICATIONS LTD PI SOUTHAMPTON PA ASHURST LODGE, SOUTHAMPTON, HANTS, ENGLAND S04 2AA BN 1-85312-394-3 PY 1996 BP 335 EP 344 PG 10 WC Engineering, Mechanical; Mathematics, Applied; Mechanics SC Engineering; Mathematics; Mechanics GA BF63N UT WOS:A1996BF63N00033 ER PT J AU Schlom, J Kantor, J Abrams, S Tsang, KY Panicali, D Hamilton, JM AF Schlom, J Kantor, J Abrams, S Tsang, KY Panicali, D Hamilton, JM TI Strategies for the development of recombinant vaccines for the immunotherapy of breast cancer SO BREAST CANCER RESEARCH AND TREATMENT LA English DT Article; Proceedings Paper CT Symposium on New Approaches in the Therapy of Breast Cancer CY OCT, 1994 CL GEORGETOWN UNIV MED CTR, WASHINGTON, DC SP Bristol Myers Squibb HO GEORGETOWN UNIV MED CTR DE carcinoembryonic antigen (CEA); immunotherapy; Phase I trial; recombinant vaccines; vaccinia virus ID HUMAN CARCINOEMBRYONIC-ANTIGEN; EPITHELIAL TUMOR-ANTIGEN; PLUS DETOX ADJUVANT; IMMUNE-RESPONSES; VIRUS-VACCINE; LYMPHOCYTES-T; CELLS; GENE; COSTIMULATION; IMMUNIZATION AB The development of recombinant vaccines for specific immunotherapy of carcinoma represents a novel approach for the treatment of breast cancer and other tumor types. This article reviews the various parameters that should be considered in the development of recombinant vaccines. Several breast cancer associated antigens are also discussed which may provide potential target molecules. The human carcinoembryonic antigen (CEA), which is expressed on approximately 50% of breast cancers, represents one such target for immunotherapy. To enhance the immunogenicity of this antigen, a recombinant CEA-vaccinia vaccine, designated rV-CEA, was produced. To study the effects of this vaccine in an animal model, a murine colon carcinoma cell line was transduced with CEA and transplanted into immunocompetent mice for protection and therapy studies. Pre-clinical toxicity studies were also conducted in non-human primates. The results of these studies showed the rV-CEA vaccine to be immunogenic and safe in both rodents and primates, and to elicit good anti-tumor responses in the rodent model. In a Phase I clinical trial in metastatic breast, lung, and colorectal cancer patients involving three immunizations of rV-CEA, at three dose levels, enhancement of T-cell and antibody responses to vaccinia virus proteins were observed with no toxicity. Specific T-cell responses were studied via stimulation of peripheral blood lymphocytes with specific peptide epitopes from the CEA molecule. These studies demonstrated clear cut differences in establishment of T-cell lines pre- versus post-immunization. The T-cell lines were shown to be CD8(+) and/or CD4(+)/CD8(+), to lyse EBV transformed B-cells transduced with the CEA gene, and to lyse CEA positive carcinoma cells in a HLA restricted manner. Thus, in a Phase I clinical trial the rV-CEA vaccine has been shown to stimulate a CTL response specific for CEA defined epitopes in cancer patients. C1 THERION BIOL CORP,CAMBRIDGE,MA 02142. NCI,USN,ONCOL BRANCH,NIH,BETHESDA,MD 20892. RP Schlom, J (reprint author), NCI,TUMOR IMMUNOL & BIOL LAB,NIH,BLDG 10,ROOM 8B07,BETHESDA,MD 20892, USA. NR 36 TC 35 Z9 35 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0167-6806 J9 BREAST CANCER RES TR JI Breast Cancer Res. Treat. PY 1996 VL 38 IS 1 BP 27 EP 39 DI 10.1007/BF01803781 PG 13 WC Oncology SC Oncology GA TU162 UT WOS:A1996TU16200005 PM 8825120 ER PT B AU Focht, EM Montemarano, TW AF Focht, EM Montemarano, TW BE Ghosh, SK Mohammadi, J TI Development of high performance steels for commercial and military applications SO BUILDING AN INTERNATIONAL COMMUNITY OF STRUCTURAL ENGINEERS, VOLS 1 AND 2 LA English DT Proceedings Paper CT American-Society-of-Civil-Engineers 14th Structures Congress CY APR 14-18, 1996 CL CHICAGO, IL SP Amer Soc Civil Engineers AB High strength steels used for bridge construction (ASTM A709) have yield strengths in the 345 to 690 MPa range and allow for carbon levels to reach as high as 0.23 wt.%. For good weldability, the carbon content of HSLA steels used by the Navy is usually restricted to a maximum of 0.10 wt.%. In an effort to improve the weldability and toughness of bridge steels with 485 MPa yield strength and provide a 450 MPa steel for naval construction, the U.S. Navy is working with industry to develop new high performance steels for bridges and a ''dual use'' steel that may be specified for both applications. The experimental steels had a maximum allowable carbon content of 0.10 wt.%, low alloying levels for good weldability and high low-temperature toughness. The copper and nickel contents are such that the steel composition is considered a weathering grade. Processing techniques such as controlled rolling and TMCP using accelerated cooling and direct quenching were employed to achieve good mechanical properties and weldability. RP Focht, EM (reprint author), USN ACAD,CTR SURFACE WARFARE,CARDEROCK DIV,ANNAPOLIS,MD 21402, USA. NR 0 TC 0 Z9 0 U1 0 U2 3 PU AMER SOC CIVIL ENGINEERS PI NEW YORK PA UNITED ENGINEERING CENTER, 345 E 47TH ST, NEW YORK, NY 10017-2398 BN 0-7844-0158-6 PY 1996 BP 91 EP 99 PG 9 WC Engineering, Civil SC Engineering GA BG80A UT WOS:A1996BG80A00009 ER PT B AU Mouring, SE Ellingwood, BR AF Mouring, SE Ellingwood, BR BE Ghosh, SK Mohammadi, J TI Minimizing floor vibrations from occupant activities SO BUILDING AN INTERNATIONAL COMMUNITY OF STRUCTURAL ENGINEERS, VOLS 1 AND 2 LA English DT Proceedings Paper CT American-Society-of-Civil-Engineers 14th Structures Congress CY APR 14-18, 1996 CL CHICAGO, IL SP Amer Soc Civil Engineers AB Excessive floor vibration due to occupant activities has become a major serviceability consideration in modern building construction with the use of longer floor spans, more flexible framing systems, and high-strength, light-weight building materials. Floor systems in shopping malls, gymnasiums, and pedestrian walkways are particularly susceptible to excessive vibrations. The design community does not have easy access to methods for accurately predicting these vibrations and evaluating floor systems. An investigation into characteristics of crowd-induced loads leads to simplified but realistic load models. The influence of each load characteristic on the dynamic response of floor systems is determined using analytical procedures. Design guidelines are developed for floor systems in gymnasiums, shopping malls, and pedestrian walkways subjected to crowd activities. RP Mouring, SE (reprint author), USN ACAD,DEPT NAVAL ARCH OCEAN & MARINE ENGN,ANNAPOLIS,MD 21402, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CIVIL ENGINEERS PI NEW YORK PA UNITED ENGINEERING CENTER, 345 E 47TH ST, NEW YORK, NY 10017-2398 BN 0-7844-0158-6 PY 1996 BP 405 EP 412 PG 8 WC Engineering, Civil SC Engineering GA BG80A UT WOS:A1996BG80A00050 ER EF