FN Thomson Reuters Web of Science™ VR 1.0 PT J AU GABERSON, HA AF GABERSON, HA TI APPLICATION OF CHOI-WILLIAMS REDUCED INTERFERENCE TIME-FREQUENCY DISTRIBUTION TO MACHINERY DIAGNOSTICS SO SHOCK AND VIBRATION LA English DT Article AB This article discusses time frequency analysis of machinery diagnostic vibration signals. The short time Fourier transform, the Wigner, and the Choi-Williams distributions are explained and illustrated with test cases. Examples of Choi-Williams analyses of machinery vibration signals are presented. The analyses detect discontinuities in the signals and their timing, amplitude and frequency modulation, and the presence of different components in a vibration signal. (C) 1995 John Wiley & Sons, Inc. RP GABERSON, HA (reprint author), USN,FACIL ENGN SERV CTR,DIV ENERGY & UTIL DEV,CODE ESC21,PORT HUENEME,CA 93043, USA. NR 0 TC 6 Z9 6 U1 1 U2 3 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 1070-9622 J9 SHOCK VIB JI Shock Vib. PY 1995 VL 2 IS 6 BP 437 EP 444 PG 8 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA TB812 UT WOS:A1995TB81200002 ER PT J AU HUANG, H KIDDY, KC AF HUANG, H KIDDY, KC TI TRANSIENT INTERACTION OF A SPHERICAL-SHELL WITH AN UNDERWATER EXPLOSION SHOCK-WAVE AND SUBSEQUENT PULSATING BUBBLE SO SHOCK AND VIBRATION LA English DT Article AB The nonlinear interaction problem is analyzed by simultaneously solving the mass, momentum, and energy conservation equations together with appropriate material constitutive equations governing the fluid dynamic of the explosion gaseous product and the water and the structural dynamics of the compliant shell. A finite difference technique in a coupled Eulerian-Lagrangian scheme is used. The computer program PISCES 2DELK is employed to carry out the numerical computations. The results demonstrate that to rigorously analyze the response of a submerged structure to a nearby explosion, the interactions among the explosion shock wave, the structure, its surrounding media, and the explosion bubble need to be considered. (C) 1995 John Wiley & Sons, Inc. RP HUANG, H (reprint author), USN,CTR SURFACE WARFARE,DIV INDIAN HEAD,SILVER SPRING,MD 20903, USA. NR 0 TC 6 Z9 6 U1 0 U2 2 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 1070-9622 J9 SHOCK VIB JI Shock Vib. PY 1995 VL 2 IS 6 BP 451 EP 460 PG 10 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA TB812 UT WOS:A1995TB81200004 ER PT B AU WATSON, GA BLAIR, WD AF WATSON, GA BLAIR, WD BE Drummond, OE TI Solution to second benchmark problem for tracking maneuvering targets in the presence of false alarms and ECM SO SIGNAL AND DATA PROCESSING OF SMALL TARGETS 1995 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Signal and Data Processing of Small Targets 1995 Conference CY JUL 11-13, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE TARGET TRACKING; SENSOR CONTROL; BENCHMARK PROBLEM; SIGNAL PROCESSING C1 USN,CTR SURFACE WARFARE,DEPT SYST RES & TECHNOL,DAHLGREN,VA 22448. NR 0 TC 2 Z9 3 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1920-6 J9 P SOC PHOTO-OPT INS PY 1995 VL 2561 BP 263 EP 274 DI 10.1117/12.217703 PG 12 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BE21L UT WOS:A1995BE21L00024 ER PT B AU GROVES, GW BLAIR, WD CONTE, JE AF GROVES, GW BLAIR, WD CONTE, JE BE Drummond, OE TI Simultaneous estimation of the specular sea reflection coefficient and tracking for low-elevation targets SO SIGNAL AND DATA PROCESSING OF SMALL TARGETS 1995 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Signal and Data Processing of Small Targets 1995 Conference CY JUL 11-13, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE PARAMETER ESTIMATION; LOW ELEVATION; MULTIPATH C1 USN,CTR SURFACE WARFARE,DEPT SYST RES & TECHNOL,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 0-8194-1920-6 J9 P SOC PHOTO-OPT INS PY 1995 VL 2561 BP 287 EP 298 DI 10.1117/12.217705 PG 12 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BE21L UT WOS:A1995BE21L00026 ER PT B AU STREIT, RL AF STREIT, RL BE Drummond, OE TI Track initialization sensitivity in clutter SO SIGNAL AND DATA PROCESSING OF SMALL TARGETS 1995 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Signal and Data Processing of Small Targets 1995 Conference CY JUL 11-13, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE INITIALIZATION; NEAREST NEIGHBOR; SIGNIFICANCE TEST; NONCENTRAL CHI-SQUARE; POISSON CLUTTER; CRITICAL DENSITY C1 USN,CTR UNDERWATER SYST,NEWPORT,RI 02841. 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 0-8194-1920-6 J9 P SOC PHOTO-OPT INS PY 1995 VL 2561 BP 460 EP 471 DI 10.1117/12.217719 PG 12 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BE21L UT WOS:A1995BE21L00040 ER PT J AU LEE, TF CLARK, JR AF LEE, TF CLARK, JR GP AMER METEOROL SOC TI Aircraft icing products from satellite infrared data and model output SO SIXTH CONFERENCE ON AVIATION WEATHER SYSTEMS LA English DT Proceedings Paper CT 6th Conference on Aviation Weather Systems, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc, Amer Inst Aeronaut & Astronaut, World Meteorol Org C1 USN,RES LAB,MONTEREY,CA 93943. NR 0 TC 2 Z9 2 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1995 BP 234 EP 236 PG 3 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA BD28R UT WOS:A1995BD28R00051 ER PT J AU WINTER, TM STRONG, AE AF WINTER, TM STRONG, AE GP AMER METEOROL SOC TI High-resolution satellite climatology SO SIXTH SYMPOSIUM ON GLOBAL CHANGE STUDIES LA English DT Meeting Abstract CT 6th Symposium on Global Change Studies, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc, Amer Geophys Union, Assoc Amer Geographers, Ecolog Soc Amer, World Meteorol Org C1 USN ACAD,NOAA,COOPERAT PROJECT OCEAN REMOTE SENSING,ANNAPOLIS,MD 21402. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1995 BP 107 EP 107 PG 1 WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Geology; Meteorology & Atmospheric Sciences GA BD28T UT WOS:A1995BD28T00026 ER PT B AU MOON, KK BARBE, DF SCRIBNER, DA KUB, FJ AF MOON, KK BARBE, DF SCRIBNER, DA KUB, FJ BE Wigdor, M Massie, MA TI NONUNIFORMITY CORRECTION OF INFRARED IMAGING ARRAYS BY ANALOG TECHNIQUES SO SMART FOCAL PLANE ARRAYS AND FOCAL PLANE ARRAY TESTING SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Smart Focal Plane Arrays and Focal Plane Array Testing CY APR 17-18, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE SMART FOCAL PLANE ARRAY; INFRARED FOCAL PLANE ARRAY; NONUNIFORMITY CORRECTION; NEURAL NETWORK; OFFSET CORRECTION; GAIN CORRECTION; LMS; DC OFFSETS C1 USN,RES LAB,WASHINGTON,DC 20375. 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 0-8194-1827-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2474 BP 2 EP 13 DI 10.1117/12.210554 PG 12 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BD32G UT WOS:A1995BD32G00001 ER PT B AU CAULFIELD, JT FISHER, J ZADNIK, JA MAK, ES SCRIBNER, DA AF CAULFIELD, JT FISHER, J ZADNIK, JA MAK, ES SCRIBNER, DA BE Wigdor, M Massie, MA TI DIGITAL CHARACTERIZATION OF A NEUROMORPHIC IRFPA SO SMART FOCAL PLANE ARRAYS AND FOCAL PLANE ARRAY TESTING SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Smart Focal Plane Arrays and Focal Plane Array Testing CY APR 17-18, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1827-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2474 BP 14 EP 22 DI 10.1117/12.210564 PG 9 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BD32G UT WOS:A1995BD32G00002 ER PT B AU DRIGGERS, R SCRIBNER, DA CLAYTON, W AF DRIGGERS, R SCRIBNER, DA CLAYTON, W BE Wigdor, M Massie, MA TI PERFORMANCE EVALUATION OF 2 RETINA-LIKE PREPROCESSORS FOR IMAGING DETECTOR ARRAYS SO SMART FOCAL PLANE ARRAYS AND FOCAL PLANE ARRAY TESTING SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Smart Focal Plane Arrays and Focal Plane Array Testing CY APR 17-18, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE IRFPA; RETINA-LIKE; PROCESSORS C1 USN,NAVAL RESERVE CTR MEMPHIS,READINESS COMMAND REG-9,MEMPHIS,TN. 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 0-8194-1827-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2474 BP 118 EP 126 DI 10.1117/12.210571 PG 9 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BD32G UT WOS:A1995BD32G00012 ER PT B AU FRISBIE, SA AF FRISBIE, SA BE Wigdor, M Massie, MA TI FOCAL PLANE CHARACTERIZATION CAPABILITIES AT NCCOSC RDT&E DIV SO SMART FOCAL PLANE ARRAYS AND FOCAL PLANE ARRAY TESTING SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Smart Focal Plane Arrays and Focal Plane Array Testing CY APR 17-18, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE INFRARED DETECTOR; FOCAL PLANE ARRAY; RADIOMETRIC CHARACTERIZATION C1 USN,CTR NAVAL COMMAND CONTROL & OCEAN SURVEILLANCE,SAN DIEGO,CA 92152. 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 0-8194-1827-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2474 BP 187 EP 192 DI 10.1117/12.210553 PG 6 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BD32G UT WOS:A1995BD32G00020 ER PT B AU FLESNER, LD CREBER, RK BENTLEY, RK AF FLESNER, LD CREBER, RK BENTLEY, RK BE Wigdor, M Massie, MA TI LOW-LEVEL GAMMA DOSIMETRY USING LOW-LEAKAGE DIODES SO SMART FOCAL PLANE ARRAYS AND FOCAL PLANE ARRAY TESTING SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Smart Focal Plane Arrays and Focal Plane Array Testing CY APR 17-18, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE GAMMA-DOSIMETRY; INFRARED DETECTORS; P-I-N DIODES C1 USN,CTR NAVAL COMMAND CONTROL & OCEAN SURVEILLANCE,DIV RES DEV TEST & EVALUAT,OPT ELECTR BRANCH,SAN DIEGO,CA 92152. 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 0-8194-1827-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2474 BP 306 EP 311 DI 10.1117/12.210566 PG 6 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BD32G UT WOS:A1995BD32G00031 ER PT B AU CLEMENT, RE AF CLEMENT, RE BE Wigdor, M Massie, MA TI LWIR FILTER AND MATERIALS TESTING AT THE NAVAL COMMAND, CONTROL AND OCEAN SURVEILLANCE CENTER RDT&E DIVISION (NRAD) SO SMART FOCAL PLANE ARRAYS AND FOCAL PLANE ARRAY TESTING SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Smart Focal Plane Arrays and Focal Plane Array Testing CY APR 17-18, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE INFRARED FILTERS; STIERWALT EFFECT; EMISSIVITY TESTING; HARDENED OPTICS C1 USN,CTR NAVAL COMMAND CONTROL & OCEAN SURVEILLANCE,OPT ELECTR BRANCH,SAN DIEGO,CA 92152. NR 0 TC 1 Z9 1 U1 1 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1827-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2474 BP 328 EP 337 DI 10.1117/12.210570 PG 10 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BD32G UT WOS:A1995BD32G00034 ER PT B AU CORSARO, RD HOUSTON, B AF CORSARO, RD HOUSTON, B BE Jardine, AP TI SMART LARGE-AREA ACTUATOR SO SMART MATERIALS: SMART STRUCTURES AND MATERIALS 1995 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Smart Materials CY FEB 27-28, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers, Amer Soc Mech Engineers, Mat Res Soc, Soc Exptl Mech Inc, IEEE, Control Syst Soc, Amer Phys Soc, Div Mat Phys, Ceram Soc Japan, Amer Inst Chem Engineers DE SMART STRUCTURES; SMART ACTUATORS; ACTUATORS; PIEZOELECTRIC SENSORS; VELOCITY SENSORS; UNDERWATER ACOUSTICS; STRUCTURAL ACOUSTIC 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 0-8194-1790-4 J9 P SOC PHOTO-OPT INS PY 1995 VL 2441 BP 320 EP 328 DI 10.1117/12.209812 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA BD32J UT WOS:A1995BD32J00034 ER PT B AU ASKINS, CG PUTNAM, MA FRIEBELE, EJ AF ASKINS, CG PUTNAM, MA FRIEBELE, EJ BE Spillman, WB TI INSTRUMENTATION FOR INTERROGATING MANY-ELEMENT FIBER BRAGG GRATING ARRAYS SO SMART SENSING, PROCESSING, AND INSTRUMENTATION - SMART STRUCTURES AND MATERIALS 1995 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation Conference CY FEB 27-MAR 01, 1995 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER SOC MECH ENGINEERS, MAT RES SOC, SOC EXPTL MECH INC, IEEE, CONTROL SYST SOC, AMER PHYS SOC, DIV MAT PHYS, CERAM SOC JAPAN, AMER INST CHEM ENGINEERS DE FIBER BRAGG GRATINGS; OPTICAL FIBER SENSORS; STRAIN SENSING; SMART STRUCTURES C1 USN,DIV OPT SCI,WASHINGTON,DC 20375. NR 0 TC 42 Z9 44 U1 0 U2 3 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1793-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2444 BP 257 EP 266 DI 10.1117/12.207681 PG 10 WC Engineering, Mechanical; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BD03Z UT WOS:A1995BD03Z00025 ER PT B AU BERKOFF, TA DAVIS, MA BELLEMORE, DG KERSEY, AD WILLIAMS, GM PUTNAM, MA AF BERKOFF, TA DAVIS, MA BELLEMORE, DG KERSEY, AD WILLIAMS, GM PUTNAM, MA BE Spillman, WB TI HYBRID TIME AND WAVELENGTH DIVISION MULTIPLEXED FIBER BRAGG GRATING SENSOR ARRAY SO SMART SENSING, PROCESSING, AND INSTRUMENTATION - SMART STRUCTURES AND MATERIALS 1995 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation Conference CY FEB 27-MAR 01, 1995 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER SOC MECH ENGINEERS, MAT RES SOC, SOC EXPTL MECH INC, IEEE, CONTROL SYST SOC, AMER PHYS SOC, DIV MAT PHYS, CERAM SOC JAPAN, AMER INST CHEM ENGINEERS C1 USN,RES LAB,DIV OPT SCI,FIBER OPT SMART STRUCT SECT,WASHINGTON,DC 20375. NR 0 TC 34 Z9 35 U1 0 U2 3 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1793-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2444 BP 288 EP 294 DI 10.1117/12.207684 PG 7 WC Engineering, Mechanical; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BD03Z UT WOS:A1995BD03Z00028 ER PT B AU DAVIS, MA KERSEY, AD AF DAVIS, MA KERSEY, AD BE Spillman, WB TI SERIALLY CONFIGURED MATCHED FILTER INTERROGATION TECHNIQUE FOR BRAGG GRATING ARRAYS SO SMART SENSING, PROCESSING, AND INSTRUMENTATION - SMART STRUCTURES AND MATERIALS 1995 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation Conference CY FEB 27-MAR 01, 1995 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER SOC MECH ENGINEERS, MAT RES SOC, SOC EXPTL MECH INC, IEEE, CONTROL SYST SOC, AMER PHYS SOC, DIV MAT PHYS, CERAM SOC JAPAN, AMER INST CHEM ENGINEERS C1 USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 1 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1793-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2444 BP 295 EP 302 DI 10.1117/12.207685 PG 8 WC Engineering, Mechanical; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BD03Z UT WOS:A1995BD03Z00029 ER PT B AU KIRBY, GC LINDNER, DK DAVIS, MA KERSEY, AD AF KIRBY, GC LINDNER, DK DAVIS, MA KERSEY, AD BE Spillman, WB TI OPTIMAL SENSOR LAYOUT FOR SHAPE ESTIMATION FROM STRAIN SENSORS SO SMART SENSING, PROCESSING, AND INSTRUMENTATION - SMART STRUCTURES AND MATERIALS 1995 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation Conference CY FEB 27-MAR 01, 1995 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER SOC MECH ENGINEERS, MAT RES SOC, SOC EXPTL MECH INC, IEEE, CONTROL SYST SOC, AMER PHYS SOC, DIV MAT PHYS, CERAM SOC JAPAN, AMER INST CHEM ENGINEERS DE OPTIMAL SENSOR PLACEMENT; SMART MATERIALS; DAMAGE DETECTION; FIBER BRAGG GRATINGS C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 6 Z9 6 U1 1 U2 2 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1793-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2444 BP 367 EP 376 DI 10.1117/12.207709 PG 10 WC Engineering, Mechanical; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BD03Z UT WOS:A1995BD03Z00035 ER PT B AU PUTNAM, MA ASKINS, CG WILLIAMS, GM FRIEBELE, EJ BASKANSKY, M REINTJES, J AF PUTNAM, MA ASKINS, CG WILLIAMS, GM FRIEBELE, EJ BASKANSKY, M REINTJES, J BE Spillman, WB TI SINGLE PULSE FABRICATION OF FIBER BRAGG GRATINGS USING A PHASE-CONJUGATED KRF EXCIMER LASER SO SMART SENSING, PROCESSING, AND INSTRUMENTATION - SMART STRUCTURES AND MATERIALS 1995 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation Conference CY FEB 27-MAR 01, 1995 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER SOC MECH ENGINEERS, MAT RES SOC, SOC EXPTL MECH INC, IEEE, CONTROL SYST SOC, AMER PHYS SOC, DIV MAT PHYS, CERAM SOC JAPAN, AMER INST CHEM ENGINEERS DE FIBER BRAGG GRATINGS; PHASE CONJUGATION; OPTICAL FIBER SENSORS; SMART STRUCTURES C1 USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375. 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 0-8194-1793-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2444 BP 403 EP 409 DI 10.1117/12.207695 PG 7 WC Engineering, Mechanical; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BD03Z UT WOS:A1995BD03Z00039 ER PT B AU FACTORY, PR AF FACTORY, PR BE Crowe, CR TI Health error prediction and sensor topology optimization on a smart pressure vessel SO SMART STRUCTURES AND MATERIALS 1995 - INDUSTRIAL AND COMMERCIAL APPLICATIONS OF SMART STRUCTURES TECHNOLOGIES SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Smart Structures and Materials 1995: Industrial and Commercial Applications of Smart Structures Technologies Conference CY MAR 02-03, 1995 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER SOC MECH ENGINEERS, MAT RES SOC, SOC EXPTL MECH INC, IEEE, CONTROL SYST SOC, AMER PHYS SOC, DIV MAT PHYS, CERAM SOC JAPAN, AMER INST CHEM ENGINEERS DE SMART STRUCTURES; SMART MATERIALS; COMPOSITE MATERIALS; DISSIPATED ENERGY DENSITY; SENSOR ERROR PREDICTION C1 USN,RES LAB,DIV MAT SCI & TECHNOL,MAT & MECH BRANCH,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 0-8194-1796-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2447 BP 155 EP 166 PG 12 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA BD11N UT WOS:A1995BD11N00014 ER PT B AU DEGIORGI, VG MATIC, P KIRBY, GC AF DEGIORGI, VG MATIC, P KIRBY, GC BE Crowe, CR TI Recent studies on integrated smart materials SO SMART STRUCTURES AND MATERIALS 1995 - INDUSTRIAL AND COMMERCIAL APPLICATIONS OF SMART STRUCTURES TECHNOLOGIES SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Smart Structures and Materials 1995: Industrial and Commercial Applications of Smart Structures Technologies Conference CY MAR 02-03, 1995 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER SOC MECH ENGINEERS, MAT RES SOC, SOC EXPTL MECH INC, IEEE, CONTROL SYST SOC, AMER PHYS SOC, DIV MAT PHYS, CERAM SOC JAPAN, AMER INST CHEM ENGINEERS DE SMART STRUCTURES; SMART MATERIALS; PIEZOELECTRIC; ACTUATORS; FINITE ELEMENT C1 USN,RES LAB,MECH MAT BRANCH,WASHINGTON,DC 20375. 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 0-8194-1796-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2447 BP 206 EP 217 DI 10.1117/12.209334 PG 12 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA BD11N UT WOS:A1995BD11N00018 ER PT B AU FRIEBELE, EJ ASKINS, CG PUTNAM, MA WILLIAMS, GM KERSEY, AD FOSHA, AA FLORIO, J DONTI, RP BLOSSER, RG AF FRIEBELE, EJ ASKINS, CG PUTNAM, MA WILLIAMS, GM KERSEY, AD FOSHA, AA FLORIO, J DONTI, RP BLOSSER, RG BE Crowe, CR TI Fabrication and application of low cost optical fiber sensor arrays for industrial and commercial applications SO SMART STRUCTURES AND MATERIALS 1995 - INDUSTRIAL AND COMMERCIAL APPLICATIONS OF SMART STRUCTURES TECHNOLOGIES SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Smart Structures and Materials 1995: Industrial and Commercial Applications of Smart Structures Technologies Conference CY MAR 02-03, 1995 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER SOC MECH ENGINEERS, MAT RES SOC, SOC EXPTL MECH INC, IEEE, CONTROL SYST SOC, AMER PHYS SOC, DIV MAT PHYS, CERAM SOC JAPAN, AMER INST CHEM ENGINEERS DE FIBER OPTIC SENSORS; SMART STRUCTURES; POLYMER-BASED COMPOSITES C1 USN,RES LAB,WASHINGTON,DC 20375. 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 0-8194-1796-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2447 BP 305 EP 311 DI 10.1117/12.209344 PG 7 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA BD11N UT WOS:A1995BD11N00027 ER PT B AU KAHN, M KRAUSE, D CHASE, M AF KAHN, M KRAUSE, D CHASE, M BE Crowe, CR TI Flaw detection in d(33) mode ceramic multilayer actuators using impedance-frequency scans SO SMART STRUCTURES AND MATERIALS 1995 - INDUSTRIAL AND COMMERCIAL APPLICATIONS OF SMART STRUCTURES TECHNOLOGIES SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Smart Structures and Materials 1995: Industrial and Commercial Applications of Smart Structures Technologies Conference CY MAR 02-03, 1995 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER SOC MECH ENGINEERS, MAT RES SOC, SOC EXPTL MECH INC, IEEE, CONTROL SYST SOC, AMER PHYS SOC, DIV MAT PHYS, CERAM SOC JAPAN, AMER INST CHEM ENGINEERS DE FLAW DETECTION; PIEZOELECTRIC RESONANCES; MULTILAYER CERAMIC ACTUATORS; HIGH FREQUENCY IMPEDANCE; NONDESTRUCTIVE PARTS ANALYSIS 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 0-8194-1796-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2447 BP 324 EP 332 DI 10.1117/12.209346 PG 9 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA BD11N UT WOS:A1995BD11N00029 ER PT B AU DAVIS, MA BELLEMORE, DG BERKOFF, TA KERSEY, AD AF DAVIS, MA BELLEMORE, DG BERKOFF, TA KERSEY, AD BE Matthews, LK TI DESIGN AND PERFORMANCE OF A FIBER BRAGG GRATING DISTRIBUTED STRAIN SENSOR SYSTEM SO SMART STRUCTURES AND MATERIALS 1995: SMART SYSTEMS FOR BRIDGES, STRUCTURES, AND HIGHWAYS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Smart Structures and Materials 1995 - Smart Systems for Bridges, Structures, and Highways CY FEB 28-MAR 03, 1995 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AMER SOC MECH ENGINEERS, MAT RES SOC, SOC EXPTL MECH, IEEE, CONTROL SYST SOC, AMER PHYS SOC, DIV MAT PHYS, CERAM SOC JAPAN, AMER INST CHEM ENGINEERS C1 USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375. NR 0 TC 13 Z9 13 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1795-5 J9 P SOC PHOTO-OPT INS PY 1995 VL 2446 BP 227 EP 235 DI 10.1117/12.207731 PG 9 WC Engineering, Civil; Optics SC Engineering; Optics GA BC99D UT WOS:A1995BC99D00022 ER PT J AU LACKEY, J WHEELER, J AF LACKEY, J WHEELER, J GP SOC FLIGHT TEST ENGINEERS TI A GPS aided altitude reference source for air data testing SO SOCIETY OF FLIGHT TEST ENGINEERS 26TH ANNUAL SYMPOSIUM "OPEN SKY", PROCEEDINGS LA English DT Proceedings Paper CT 26th Annual Symposium of the Society-of-Flight-Test-Engineers - Open Sky CY JUN 19-23, 1995 CL BERLIN, GERMANY SP Soc Flight Test Engineers, European Chapter C1 USN,CTR AIR WARFARE,DIV AIRCRAFT,PATUXENT RIVER,MD. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC FLIGHT TEST ENGINEERS PI LANCASTER PA P.O. BOX 4047, LANCASTER, CA 93534 PY 1995 BP C29 EP C37 PG 3 WC Engineering, Aerospace SC Engineering GA BD80D UT WOS:A1995BD80D00011 ER PT J AU RYBERG, ES MINNICH, SB CONIGLIARO, PE AF RYBERG, ES MINNICH, SB CONIGLIARO, PE GP SOC FLIGHT TEST ENGINEERS TI F-14 digital flight control system: Integration, simulation, and flight test update SO SOCIETY OF FLIGHT TEST ENGINEERS 26TH ANNUAL SYMPOSIUM "OPEN SKY", PROCEEDINGS LA English DT Proceedings Paper CT 26th Annual Symposium of the Society-of-Flight-Test-Engineers - Open Sky CY JUN 19-23, 1995 CL BERLIN, GERMANY SP Soc Flight Test Engineers, European Chapter C1 USN,CTR AIR WARFARE,DIV AIRCRAFT,PATUXENT RIVER,MD. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC FLIGHT TEST ENGINEERS PI LANCASTER PA P.O. BOX 4047, LANCASTER, CA 93534 PY 1995 BP E1 EP E14 PG 4 WC Engineering, Aerospace SC Engineering GA BD80D UT WOS:A1995BD80D00020 ER PT J AU WHITLEY, SE FRAZIER, FA AF WHITLEY, SE FRAZIER, FA GP SOC FLIGHT TEST ENGINEERS TI Developing flight test techniques to ensure proper rigging of highly augmented aircraft SO SOCIETY OF FLIGHT TEST ENGINEERS 26TH ANNUAL SYMPOSIUM "OPEN SKY", PROCEEDINGS LA English DT Proceedings Paper CT 26th Annual Symposium of the Society-of-Flight-Test-Engineers - Open Sky CY JUN 19-23, 1995 CL BERLIN, GERMANY SP Soc Flight Test Engineers, European Chapter C1 USN,CTR AIR WARFARE,DIV AIRCRAFT,PATUXENT RIVER,MD. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC FLIGHT TEST ENGINEERS PI LANCASTER PA P.O. BOX 4047, LANCASTER, CA 93534 PY 1995 BP F9 EP F17 PG 3 WC Engineering, Aerospace SC Engineering GA BD80D UT WOS:A1995BD80D00025 ER PT B AU Apruzese, JP Clark, RW Davis, J Pulsifer, P AF Apruzese, JP Clark, RW Davis, J Pulsifer, P BE Rocca, JJ Hagelstein, PL TI Mixing of pump and lasant species in photopumped systems driven by a femtosecond laser SO SOFT X-RAY LASERS AND APPLICATIONS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Soft X-Ray Lasers and Applications CY JUL 10-11, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE resonant photopumping; ultrashort pulse laser; optical field ionization; above-threshold-ionization; multiphoton ionization; electron temperature; x-ray laser C1 USN,RES LAB,DIV PLASMA PHYS,RADIAT HYDRODYNAM BRANCH,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 0-8194-1879-X J9 P SOC PHOTO-OPT INS PY 1995 VL 2520 BP 91 EP 96 DI 10.1117/12.221622 PG 6 WC Optics; Physics, Applied; Spectroscopy SC Optics; Physics; Spectroscopy GA BE29B UT WOS:A1995BE29B00010 ER PT B AU Clark, RW Davis, J Velikovich, A Whitney, KG AF Clark, RW Davis, J Velikovich, A Whitney, KG BE Rocca, JJ Hagelstein, PL TI X-ray lasing in colliding plasmas SO SOFT X-RAY LASERS AND APPLICATIONS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Soft X-Ray Lasers and Applications CY JUL 10-11, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE stagnating plasmas; ultrashort pulse laser; x-ray laser; above-threshold ionization C1 USN,RES LAB,DIV PLASMA PHYS,RADIAT HYDRODYNAM BRANCH,WASHINGTON,DC 20375. RI Velikovich, Alexander/B-1113-2009 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 0-8194-1879-X J9 P SOC PHOTO-OPT INS PY 1995 VL 2520 BP 340 EP 346 PG 7 WC Optics; Physics, Applied; Spectroscopy SC Optics; Physics; Spectroscopy GA BE29B UT WOS:A1995BE29B00038 ER PT J AU VOLPANO, DM AF VOLPANO, DM TI TYPE CHECKING COHERENT OVERLOADING SO SOFTWARE-CONCEPTS AND TOOLS LA English DT Article DE OBJECT-ORIENTED SYSTEMS; FORMAL FOUNDATION; SOFTWARE ENGINEERING METHODS; PROGRAMMING LANGUAGES; TYPE SYSTEMS AB An algebraic characterization of coherent overloading is presented based on the idea of interpretations as models of algebras. The primary advantage is that it allows programs in an implicitly typed, polymorphic programming language with overloaded operators to be interpreted unambiguously using algebraic semantics. However, type checking such programs under this view of coherence requires ensuring the existence of a common model among algebras for different overloaded operators that interact. We show that some extensions of the ML type system designed to incorporate overloading support this notion of coherence while others, including the Haskell type system, do not. C1 USN, POSTGRAD SCH, DEPT COMP SCI, MONTEREY, CA 93943 USA. NR 17 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0945-8115 J9 SOFTWARE-CONC TOOL JI Softw.-Concepts Tools PY 1995 VL 16 IS 2 BP 81 EP 85 PG 5 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA RK097 UT WOS:A1995RK09700003 ER PT S AU BENTLEY, RD DOSCHEK, GA MARISKA, JT AF BENTLEY, RD DOSCHEK, GA MARISKA, JT BE Culhane, JL Hiei, E TI TIMING OF THE SOFT-X-RAY BLUE-WING AND THE HARD X-RAY BURST FROM OBSERVATIONS BY YOHKOH SO SOLAR FLARE, CORONAL AND HELIOSPHERIC DYNAMICS SE ADVANCES IN SPACE RESEARCH-SERIES LA English DT Article; Proceedings Paper CT E2.2 Symposium of COSPAR Scientific Commission E on Solar Flare, Coronal and Heliospheric Dynamics, at the 13th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res, Int Astron Union, Sci Comm Solar Terrestrial Phys AB A knowledge of the relative timing of the hard X-ray burst and emission in soft X-rays is helpful in deciding between a number of theoretical models that describe the mechanism of a solar flare. Here we continue a study of this relationship using observations from the Yohkoh Bragg Crystal Spectrometer and Hard X-ray Telescope, together with supporting observations from the CGRO Batse experiment. The enhanced capabilities of the instruments onboard Yohkoh have made it possible to study the problem in a way that was not previously possible. A study of the timing, intensity and evolution of the soft X-ray blue-wing shows that there is no simple relationship between hard and soft X-ray emissions; strong blue-wings sometimes result from relatively weak hard X-ray bursts; the burst responsible for the blue wing need not be the first or most intense burst associated with the flare; the blue-wing is found to follow very closely after the hard X-ray burst. We also discuss timing issues and why other researchers may have reached different conclusions on this matter. C1 USN, RES LAB, EO HULBURT CTR SPACE RES, WASHINGTON, DC 20375 USA. RP BENTLEY, RD (reprint author), UCL, MULLARD SPACE SCI LAB, HOLMBURY ST MARY, DORKING RH5 6NT, SURREY, ENGLAND. NR 6 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0273-1177 BN 0-08-042644-1 J9 ADV SPACE RES-SERIES PY 1995 VL 17 IS 4/5 BP 55 EP 58 PG 4 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA BD87Y UT WOS:A1995BD87Y00008 ER PT S AU COOK, JW WALJESKI, K MOSES, D BRUECKNER, GE AF COOK, JW WALJESKI, K MOSES, D BRUECKNER, GE BE Culhane, JL Hiei, E TI COMPARISON OF SOLAR-FLARE EMISSION MEASURES FROM BROAD-BAND SOFT-X-RAY AND ULTRAVIOLET SPECTROGRAPH OBSERVATIONS SO SOLAR FLARE, CORONAL AND HELIOSPHERIC DYNAMICS SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT E2.2 Symposium of COSPAR Scientific Commission E on Solar Flare, Coronal and Heliospheric Dynamics, at the 13th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res, Int Astron Union, Sci Comm Solar Terrestrial Phys AB Joint observations of a solar flare were obtained by the AS&E Imaging X-ray Telescope and the NRL High Resolution Telescope and Spectrograph (HBTS), We compare emission measures from soft X-ray and HRTS data. A small isolated X-ray loop close to the HRTS slit position has an emission measure n(e)(2) Delta L of 3.5x10(29) cm(-5), compared to an emission measure of 2.7x10(29) cm(-5) obtained from the intensity of flaring Fe XXI 1354 Angstrom plasma along the HRTS slit. RP COOK, JW (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042644-1 J9 ADV SPACE RES PY 1995 VL 17 IS 4/5 BP 101 EP 104 PG 4 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA BD87Y UT WOS:A1995BD87Y00016 ER PT J AU EFROS, AL KHARCHENKO, VA ROSEN, M AF EFROS, AL KHARCHENKO, VA ROSEN, M TI BREAKING THE PHONON BOTTLENECK IN NANOMETER QUANTUM DOTS - ROLE OF AUGER-LIKE PROCESSES SO SOLID STATE COMMUNICATIONS LA English DT Article ID ELECTRON; ABSORPTION; STATES AB An Auger-like mechanism is described for the rapid transfer of the electron energy to the hole in the valence band via their Coulomb interaction in the nanometer size quantum dots. The relaxation time and its dependence on the nanocrystal energy band parameters and radius is obtained. a value of similar to 2 ps has been calculated for the electron thermalization from the first excited to the ground state of spherical CdSe nanocrystals. Our results show that Auger-like processes remove the thermalization ''phonon bottleneck'' problem in nanometer quantum dots with level spacings greater than typical phonon energies. C1 HARVARD UNIV,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. RP EFROS, AL (reprint author), USN,RES LAB,BEAM THEORY SECT,WASHINGTON,DC 20375, USA. NR 21 TC 301 Z9 302 U1 4 U2 39 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD JAN PY 1995 VL 93 IS 4 BP 281 EP 284 PG 4 WC Physics, Condensed Matter SC Physics GA QE512 UT WOS:A1995QE51200006 ER PT J AU MEANS, TS MEHAY, SL AF MEANS, TS MEHAY, SL TI ESTIMATING THE PUBLICNESS OF LOCAL-GOVERNMENT SERVICES - ALTERNATIVE CONGESTION FUNCTION SPECIFICATIONS SO SOUTHERN ECONOMIC JOURNAL LA English DT Article C1 USN,POSTGRAD SCH,MONTEREY,CA. RP MEANS, TS (reprint author), SAN JOSE STATE UNIV,SAN JOSE,CA 95192, USA. NR 16 TC 6 Z9 7 U1 0 U2 2 PU UNIV NORTH CAROLINA PI CHAPEL HILL PA SOUTHERN ECONOMIC JOURNAL, CHAPEL HILL, NC 27514 SN 0038-4038 J9 SOUTHERN ECON J JI South. Econ. J. PD JAN PY 1995 VL 61 IS 3 BP 614 EP 627 DI 10.2307/1060985 PG 14 WC Economics SC Business & Economics GA QB708 UT WOS:A1995QB70800004 ER PT S AU MONET, DG AF MONET, DG BE Proulx, RJ Liu, JJF Seidelmann, PK Alfano, S TI Star catalogs from the USNO PMM SO SPACEFLIGHT MECHANICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Spaceflight Mechanics Conference CY FEB 13-16, 1995 CL ALBUQUERQUE, NM SP Amer Astronaut Soc, AIAA C1 USN OBSERV,FLAGSTAFF STN,FLAGSTAFF,AZ 86002. 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 0-87703-401-X J9 ADV ASTRONAUT SCI PY 1995 VL 89 BP 43 EP 48 PN 1-2 PG 6 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BD88R UT WOS:A1995BD88R00003 ER PT S AU SOYKA, MT AF SOYKA, MT BE Proulx, RJ Liu, JJF Seidelmann, PK Alfano, S TI Clementine .2. Preliminary design of a possible lunar rover and lidar altimeter mission SO SPACEFLIGHT MECHANICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Spaceflight Mechanics Conference CY FEB 13-16, 1995 CL ALBUQUERQUE, NM SP Amer Astronaut Soc, AIAA C1 USN,RES LAB,ASTRODYNAM & SPACE APPLICAT OFF,WASHINGTON,DC 20375. 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 0-87703-401-X J9 ADV ASTRONAUT SCI PY 1995 VL 89 BP 299 EP 316 PN 1-2 PG 18 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BD88R UT WOS:A1995BD88R00019 ER PT S AU KAUFMAN, B MIDDOUR, J RICHON, K AF KAUFMAN, B MIDDOUR, J RICHON, K BE Proulx, RJ Liu, JJF Seidelmann, PK Alfano, S TI Mission design of the Clementine space experiment SO SPACEFLIGHT MECHANICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Spaceflight Mechanics Conference CY FEB 13-16, 1995 CL ALBUQUERQUE, NM SP Amer Astronaut Soc, AIAA C1 USN,RES LAB,ASTRODYNAM & SPACE APPLICAT OFF,WASHINGTON,DC 20375. 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 0-87703-401-X J9 ADV ASTRONAUT SCI PY 1995 VL 89 BP 407 EP 422 PN 1-2 PG 16 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BD88R UT WOS:A1995BD88R00026 ER PT S AU MIDDOUR, J HOPE, A DASENBROCK, R BAKERIS, D AF MIDDOUR, J HOPE, A DASENBROCK, R BAKERIS, D BE Proulx, RJ Liu, JJF Seidelmann, PK Alfano, S TI Trajectory and maneuver planning products and procedures for Clementine operations SO SPACEFLIGHT MECHANICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Spaceflight Mechanics Conference CY FEB 13-16, 1995 CL ALBUQUERQUE, NM SP Amer Astronaut Soc, AIAA C1 USN,RES LAB,WASHINGTON,DC 20375. 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 0-87703-401-X J9 ADV ASTRONAUT SCI PY 1995 VL 89 BP 423 EP 435 PN 1-2 PG 13 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BD88R UT WOS:A1995BD88R00027 ER PT S AU SOYKA, MT AF SOYKA, MT BE Proulx, RJ Liu, JJF Seidelmann, PK Alfano, S TI Clementine: Contingency options for the phasing loops used in the lunar transfer SO SPACEFLIGHT MECHANICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Spaceflight Mechanics Conference CY FEB 13-16, 1995 CL ALBUQUERQUE, NM SP Amer Astronaut Soc, AIAA C1 USN,RES LAB,ASTRODYNAM & SPACE APPLICAT OFF,WASHINGTON,DC 20375. 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 0-87703-401-X J9 ADV ASTRONAUT SCI PY 1995 VL 89 BP 437 EP 456 PN 1-2 PG 20 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BD88R UT WOS:A1995BD88R00028 ER PT S AU REGEON, P CHAPMAN, RJ AF REGEON, P CHAPMAN, RJ BE Proulx, RJ Liu, JJF Seidelmann, PK Alfano, S TI Clementine lunar orbiter spacecraft system design SO SPACEFLIGHT MECHANICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Spaceflight Mechanics Conference CY FEB 13-16, 1995 CL ALBUQUERQUE, NM SP Amer Astronaut Soc, AIAA C1 USN,RES LAB,CLEMENTINE PROGRAM,WASHINGTON,DC 20375. 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 0-87703-401-X J9 ADV ASTRONAUT SCI PY 1995 VL 89 BP 501 EP 514 PN 1-2 PG 14 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BD88R UT WOS:A1995BD88R00031 ER PT S AU MELVIN, PJ WARD, LM AXELRAD, P AF MELVIN, PJ WARD, LM AXELRAD, P BE Proulx, RJ Liu, JJF Seidelmann, PK Alfano, S TI The analysis of GPS attitude data from a slowly rotating, symmetrical gravity gradient satellite SO SPACEFLIGHT MECHANICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Spaceflight Mechanics Conference CY FEB 13-16, 1995 CL ALBUQUERQUE, NM SP Amer Astronaut Soc, AIAA C1 USN,RES LAB,ASTRODYNAM & SPACE APPLICAT OFF,WASHINGTON,DC 20375. NR 0 TC 3 Z9 3 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-401-X J9 ADV ASTRONAUT SCI PY 1995 VL 89 BP 539 EP 558 PN 1-2 PG 20 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BD88R UT WOS:A1995BD88R00034 ER PT S AU NICHOLSON, JC ROSS, IM AF NICHOLSON, JC ROSS, IM BE Proulx, RJ Liu, JJF Seidelmann, PK Alfano, S TI Performance of optimal synergetic maneuvers SO SPACEFLIGHT MECHANICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Spaceflight Mechanics Conference CY FEB 13-16, 1995 CL ALBUQUERQUE, NM SP Amer Astronaut Soc, AIAA C1 USN,POSTGRAD SCH,MONTEREY,CA 93943. NR 0 TC 1 Z9 1 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-401-X J9 ADV ASTRONAUT SCI PY 1995 VL 89 BP 923 EP 935 PN 1-2 PG 13 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BD88R UT WOS:A1995BD88R00060 ER PT S AU DANIELSON, DA SAGOVAC, CP AF DANIELSON, DA SAGOVAC, CP BE Proulx, RJ Liu, JJF Seidelmann, PK Alfano, S TI Semianalytic satellite theory: Truncation algorithms SO SPACEFLIGHT MECHANICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Spaceflight Mechanics Conference CY FEB 13-16, 1995 CL ALBUQUERQUE, NM SP Amer Astronaut Soc, AIAA 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 0-87703-401-X J9 ADV ASTRONAUT SCI PY 1995 VL 89 BP 1501 EP 1523 PN 1-2 PG 23 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BD88R UT WOS:A1995BD88R00095 ER PT B AU Tsypkin, M AF Tsypkin, M BE Parrott, B TI The politics of Russian security policy SO STATE BUILDING AND MILITARY POWER IN RUSSIA AND THE NEW STATES OF EURASIA SE INTERNATIONAL POLITICS OF EUROSIA LA English DT Proceedings Paper CT Workshop on State Building and Military Power in Russia and the New States of Eurasia CY JUL 11-15, 1994 CL LONDON, ENGLAND SP Kings Coll, Dept War Studies, Russian Littoral Project, Int Inst Strageg Studies C1 USN,POST GRAD SCH,DEPT NATL SECUR STUDIES,MONTEREY,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU M E SHARPE INC PI ARMONK PA 80 BUSINESS PARK DRIVE, ARMONK, NY 10504 BN 1-56324-360-1 J9 INT POL EUR PY 1995 VL 5 BP 11 EP 43 PG 33 WC International Relations SC International Relations GA BF17G UT WOS:A1995BF17G00002 ER PT B AU DARKEN, R TONNESEN, C JONES, KP AF DARKEN, R TONNESEN, C JONES, KP BE Fisher, SS Merritt, JO Bolas, MT TI THE BRIDGE BETWEEN DEVELOPERS AND VIRTUAL ENVIRONMENTS - A ROBUST VIRTUAL ENVIRONMENT SYSTEM ARCHITECTURE SO STEREOSCOPIC DISPLAYS AND VIRTUAL REALITY SYSTEMS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Stereoscopic Displays and Virtual Reality Systems II CY FEB 07-09, 1995 CL SAN JOSE, CA SP SOC IMAGING SCI & TECHNOL, SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1756-4 J9 P SOC PHOTO-OPT INS PY 1995 VL 2409 BP 234 EP 240 DI 10.1117/12.205866 PG 7 WC Computer Science, Artificial Intelligence; Optics SC Computer Science; Optics GA BC78R UT WOS:A1995BC78R00029 ER PT S AU NATISHAN, MAE PORR, WC AF NATISHAN, MAE PORR, WC BE Toor, PM TI THE EFFECT OF GRAIN BOUNDARY CARBON ON THE HYDROGEN-ASSISTED INTERGRANULAR FAILURE OF NICKEL-COPPER ALLOY K-500 FASTENER MATERIAL SO STRUCTURAL INTEGRITY OF FASTENERS SE AMERICAN SOCIETY FOR TESTING AND MATERIALS SPECIAL TECHNICAL PUBLICATION LA English DT Proceedings Paper CT Symposium on Structural Integrity of Fasteners CY NOV 16-19, 1992 CL MIAMI, FL SP AMER SOC TESTING & MAT, COMM E08 FATIGUE & FRACTURE DE NICKEL-COPPER K-500; GRAIN BOUNDARY CARBON; INTERGRANULAR FAILURE; FASTENERS; HYDROGEN EMBRITTLEMENT; SLOW LOADING RATE PROPERTIES C1 USN,CTR SURFACE WARFARE,CARDEROCK DIV,ANNAPOLIS DETACHMENT,ANNAPOLIS,MD 21402. NR 0 TC 3 Z9 3 U1 0 U2 0 PU AMERICAN SOCIETY TESTING AND MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DRIVE, W CONSHOHOCKEN, PA 19428-2959 SN 1071-5827 BN 0-8031-2017-6 J9 AM SOC TEST MATER PY 1995 VL 1236 BP 81 EP 92 DI 10.1520/STP13048S PG 12 WC Engineering, Mechanical SC Engineering GA BD13L UT WOS:A1995BD13L00006 ER PT S AU STREITZ, FH MINTMIRE, JW AF STREITZ, FH MINTMIRE, JW BE Bonnell, D Ruhle, M Chowdhry, U TI Atomic scale simulations of tensile failure in metal oxides SO STRUCTURE AND PROPERTIES OF INTERFACES IN CERAMICS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Structure and Properties of Interfaces in Ceramics, at the 1994 Fall Meeting of the Materials-Research-Society CY NOV 28-DEC 02, 1994 CL BOSTON, MA SP Mat Res Soc C1 USN,RES LAB,WASHINGTON,DC 20375. OI Mintmire, John/0000-0002-6551-0349 NR 0 TC 1 Z9 1 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-258-8 J9 MATER RES SOC SYMP P PY 1995 VL 357 BP 459 EP 463 PG 5 WC Materials Science, Ceramics SC Materials Science GA BD52Z UT WOS:A1995BD52Z00067 ER PT S AU Treece, RE Dorsey, P Horwitz, JS Qadri, S Chrisey, DB AF Treece, RE Dorsey, P Horwitz, JS Qadri, S Chrisey, DB BE Nguyen, TD Lairson, BM Clemens, BM Shin, SC Sato, K TI High quality NiFe/Ag superlattices made by pulsed laser deposition (PLD) SO STRUCTURE AND PROPERTIES OF MULTILAYERED THIN FILMS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Structure and Properties of Multilayered Thin Films, at the 1995 MRS Spring Meeting CY APR 17-20, 1995 CL SAN FRANCISCO, CA SP Mat Res Soc C1 USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,WASHINGTON,DC 20375. NR 0 TC 1 Z9 1 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-285-5 J9 MATER RES SOC SYMP P PY 1995 VL 382 BP 89 EP 94 PG 6 WC Materials Science, Coatings & Films SC Materials Science GA BE43P UT WOS:A1995BE43P00014 ER PT B AU McNelly, TR Hales, SJ AF McNelly, TR Hales, SJ BE Ghosh, AK Bieler, TR TI Grain boundary misorientation distribution and superplasticity in Al-10Mg-0.1Zr SO SUPERPLASTICITY AND SUPERPLASTIC FORMING, 1995 LA English DT Proceedings Paper CT Conference on Superplasticity and Superplastic Forming, at the TMS Annual Meeting CY FEB 13-15, 1995 CL LAS VEGAS, NV SP Minerals Met & Mat Soc, Shaping & Forming Comm C1 USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943. NR 0 TC 1 Z9 1 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-300-7 PY 1995 BP 57 EP 66 PG 10 WC Engineering, Chemical; Metallurgy & Metallurgical Engineering; Materials Science, Coatings & Films SC Engineering; Metallurgy & Metallurgical Engineering; Materials Science GA BG03B UT WOS:A1995BG03B00008 ER PT J AU GOLDMAN, G WELBOURN, R KOBZIK, L VALERI, CR SHEPRO, D HECHTMAN, HB AF GOLDMAN, G WELBOURN, R KOBZIK, L VALERI, CR SHEPRO, D HECHTMAN, HB TI NEUTROPHIL ADHESION RECEPTOR CD18 MEDIATES REMOTE BUT NOT LOCALIZED ACID ASPIRATION INJURY SO SURGERY LA English DT Article ID LEUKOCYTE ADHESION; ENDOTHELIAL-CELLS; LUNG INJURY; ADHERENCE; GLYCOPROTEIN; DEPENDENCE; EXPRESSION; MAC-1 AB Background. Acid aspiration leads to lung polymorphonuclear neutrophil (PMN) sequestration and an associated increase in permeability. Although it is known that the neutrophil adhesion receptor (CD18) plays no role in determining PMN accumulations in the region aspirated, we postulated that this PMN adhesion receptor and its endothelial ligand, intercellular adhesion molecule-1 (ICAM-1), mediate remote neutrophil sequestration. Methods. Anesthetized rabbits underwent localized aspiration of either 0.1N HCl 0.1 ml/kg (n = 18) or saline solution (n = 18). Results. After 30 minutes leukopenia was noted, 2290 +/- 200 white blood cells/mm(3) (p < 0.05). At 3 hours diapedesis occurred in the aspirated segment with accumulations in bronchoalveolar lavage fluid (X10(4)) of 87 +/- 6 PMN/ml versus control of 6 +/- 1 PMN/ml (p < 0.05). Histologic evidence of generalized lung leukosequestration occurred. The wet to dry weight ratio of the nonaspirated lung rose to 5.7 +/- 0.2 versus central of 3.9 +/- 0.1 (p < 0.05). Treatment (n = 18) with the CD18 monoclonal antibody (mAb) (R15.7, 1 mg/kg) had no effect on neutrophil accumulations in the aspirated segment. However, the mAb attenuated the remote inflammatory response: early leukopenia (5790 +/- 400 white blood cells/mm(3)); lung leukosequestration (24 +/- 4 PMN/10 high-power fields); protein leak in bronchoalveolar lavage fluid (570 +/- 50 mu g/ml); and edema, wet to dry weight ratio (4.9 +/- 0.1) (all p < 0.05). Treatment with the ICAM-1 mAb (RR1/1, 1 mg/kg) (n = 9) did not reduce neutrophil accumulations in the aspirated segment but limited the remote inflammatory response. Conclusions. Acid aspiration leads to neutrophil adhesion and edema in regions remote from those aspirated via neutrophil CD18 and endothelial ICAM-1. C1 BRIGHAM & WOMENS HOSP,DEPT SURG,BOSTON,MA 02115. BRIGHAM & WOMENS HOSP,DEPT PATHOL,BOSTON,MA. HARVARD UNIV,SCH MED,BOSTON,MA. USN,BLOOD RES LAB,BOSTON,MA. BOSTON UNIV,CTR BIOL SCI,BOSTON,MA. FU NHLBI NIH HHS [HL 16714-13]; NIGMS NIH HHS [GM 35141-03, GM 24891-11] NR 22 TC 18 Z9 18 U1 0 U2 0 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0039-6060 J9 SURGERY JI Surgery PD JAN PY 1995 VL 117 IS 1 BP 83 EP 89 DI 10.1016/S0039-6060(05)80233-8 PG 7 WC Surgery SC Surgery GA QB712 UT WOS:A1995QB71200013 PM 7809841 ER PT S AU MURRAY, SA AF MURRAY, SA BE Anzai, Y Ogawa, K Mori, H TI The NRaD Virtual Presence Program SO SYMBIOSIS OF HUMAN AND ARTIFACT: FUTURE COMPUTING AND DESIGN FOR HUMAN-COMPUTER INTERACTION SE ADVANCES IN HUMAN FACTORS / ERGONOMICS LA English DT Proceedings Paper CT 6th International Conference on Human-Computer Interaction (HCI International 95) CY JUL 09-14, 1995 CL TOKYO, JAPAN SP Informat Proc Soc Japan, Inst Electr Informat & Commun Engineers, Japan Ergon Res Soc, Public Hlth Res Ctr, Soc Instrument & Control Engineers C1 USN,CTR COMMAND CONTROL & OCEAN SURVEILLANCE,ADAPT SYST BRANCH,DIV RDTE 531,SAN DIEGO,CA 92152. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE PUBL B V PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-2647 BN 0-444-81795-6 J9 ADV HUM FACT ERGON PY 1995 VL 20 BP 493 EP 498 PN A PG 4 WC Computer Science, Information Systems; Ergonomics; Psychology SC Computer Science; Engineering; Psychology GA BD79C UT WOS:A1995BD79C00078 ER PT B AU Holtz, RL Imam, MA Meyn, DA AF Holtz, RL Imam, MA Meyn, DA BE Froes, FH Suryanarayana, C WardClose, CM TI Amorphous magnesium-nickel hydrogen-storage alloys synthesized by sputtering SO SYNTHESIS/PROCESSING OF LIGHTWEIGHT METALLIC MATERIALS LA English DT Proceedings Paper CT Symposium on Synthesis/Processing of Lightweight Metallic Materials, at the TMS Annual Meeting CY FEB 13-16, 1995 CL LAS VEGAS, NV SP Minerals Met & Mat Soc, Mat Design & Mfg Div, ASM Int, Mat Synthesis & Proc Comm C1 USN,RES LAB,MAT SCI & TECHNOL DIV,WASHINGTON,DC 20375. NR 0 TC 4 Z9 4 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-316-3 PY 1995 BP 339 EP 346 PG 8 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BG02K UT WOS:A1995BG02K00030 ER PT J AU SINGH, A TSAO, LI PURANIK, DB AF SINGH, A TSAO, LI PURANIK, DB TI SYNTHESIS OF METAL-CHELATING POLYMERIZABLE PHOSPHOLIPIDS SO SYNTHETIC COMMUNICATIONS LA English DT Article ID DIACETYLENIC PHOSPHOLIPIDS; LIPID TUBULES AB Two routes for the synthesis of metal chelating phospholipids are reported. An iminodiacetic acid functionality served as metal chelating site in the polar headgroup region of a phospholipid while a tricosa-10,12-diynoyl group linked to the glycerol backbone, made up the polymerizable hydrocarbon region. C1 GEORGETOWN UNIV,DEPT BIOCHEM,WASHINGTON,DC 20040. RP SINGH, A (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375, USA. NR 14 TC 7 Z9 7 U1 1 U2 1 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0039-7911 J9 SYNTHETIC COMMUN JI Synth. Commun. PY 1995 VL 25 IS 4 BP 573 EP 586 DI 10.1080/00397919508011392 PG 14 WC Chemistry, Organic SC Chemistry GA QE430 UT WOS:A1995QE43000015 ER PT S AU Goguen, JA Luqi AF Goguen, JA Luqi BE Mosses, PD Nielsen, M Schwartzbach, MI TI Formal methods and social context in software development SO TAPSOFT '95: THEORY AND PRACTICE OF SOFTWARE DEVELOPMENT SE Lecture Notes in Computer Science LA English DT Article; Proceedings Paper CT 6th International Joint Conference on the Theory and Practice of Software Development (TAPSOFT 95) CY MAY 22-26, 1995 CL UNIV AARHUS, AARHUS, DENMARK SP ESPRIT Basic Res Working Grp 6112, Univ Aarhus, Dept Comp Sci, Denmark, European Assoc Theoret Comp Sci, Danish Sci Res Council, Univ Aarhus, Fac Sci, Denmark HO UNIV AARHUS AB Formal methods have not been accepted to the extent for which many computing scientists hoped. This paper explores some reasons for that fact, and proposes some ways to make progress. One major problem has been that formal methods have not taken sufficient account of the social context of computer systems. For example, social context causes a continuous evolution of requirements for large complex systems. This implies that designs, specifications and code must also evolve with requirements, and that traceability is important. We discuss a traceability technique called hyper-requirements. To better understand social context, we discuss ethnomethodology, a branch of sociology, and situated abstract data types, which help bridge the gap between the technical and the social. These attempt to provide a scientific basis for requirements capture. Some case studies are briefly described. We distinguish between small, large and huge grain formal methods, arguing that small grain methods do not scale up. This motivates our discussions of software composition and a new paradigm of ''Domain Specific Formal Methods.'' C1 USN, POSTGRAD SCH, MONTEREY, CA USA. RP UNIV OXFORD, COMP LAB, PROGRAMMING RES GRP, OXFORD, ENGLAND. NR 26 TC 12 Z9 12 U1 0 U2 5 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-59293-8 J9 LECT NOTES COMPUT SC PY 1995 VL 915 BP 62 EP 81 PG 20 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA BE66C UT WOS:A1995BE66C00004 ER PT B AU NEE, SMF AF NEE, SMF BE Watkins, WR Clement, D TI Polarization characterization for target surfaces SO TARGETS AND BACKGROUNDS: CHARACTERIZATION AND REPRESENTATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Targets and Backgrounds - Characterization and Representation CY APR 17-19, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 USN,CTR WEAP,DIV WEAPONS,PHYS BRANCH,CHINA LAKE,CA 93555. NR 0 TC 6 Z9 6 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1822-6 J9 P SOC PHOTO-OPT INS PY 1995 VL 2469 BP 220 EP 230 DI 10.1117/12.210593 PG 11 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BD42C UT WOS:A1995BD42C00023 ER PT B AU NEE, TW NEE, SMF AF NEE, TW NEE, SMF BE Watkins, WR Clement, D TI Infrared polarization signatures for targets SO TARGETS AND BACKGROUNDS: CHARACTERIZATION AND REPRESENTATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Targets and Backgrounds - Characterization and Representation CY APR 17-19, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE STOKES PARAMETERS; MUELLER MATRIX; LINEAR POLARIZATION; CIRCULAR POLARIZATION; IMAGE; CYLINDRICAL TARGET; DIELECTRIC COATING; METALLIC SUBSTRATE; NONMETALLIC SUBSTRATE C1 USN,CTR AIR WARFARE,DIV WEAPONS,DIV RES & TECHNOL,CHINA LAKE,CA 93555. NR 0 TC 19 Z9 19 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1822-6 J9 P SOC PHOTO-OPT INS PY 1995 VL 2469 BP 231 EP 241 DI 10.1117/12.210594 PG 11 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BD42C UT WOS:A1995BD42C00024 ER PT B AU WILCOXEN, B HECKATHORN, H AF WILCOXEN, B HECKATHORN, H BE Watkins, WR Clement, D TI Synthetic Scene Generation Model (SSGM R6.0) SO TARGETS AND BACKGROUNDS: CHARACTERIZATION AND REPRESENTATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Targets and Backgrounds - Characterization and Representation CY APR 17-19, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE PHENOMENOLOGY; SCENE GENERATION; SENSOR SIMULATION; TARGET AND BACKGROUND SIGNATURES; BALLISTIC MISSILE DEFENSE ORGANIZATION (BMDO); THEATER MISSILE DEFENSE (TMD); MODELING AND SIMULATION (M-AND-S) 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 0-8194-1822-6 J9 P SOC PHOTO-OPT INS PY 1995 VL 2469 BP 300 EP 316 DI 10.1117/12.210599 PG 17 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BD42C UT WOS:A1995BD42C00030 ER PT B AU WALKER, PL LENTZ, WJ COOPER, AW AF WALKER, PL LENTZ, WJ COOPER, AW BE Watkins, WR Clement, D TI Atmospheric and sea state dependence of polarized infrared contrast SO TARGETS AND BACKGROUNDS: CHARACTERIZATION AND REPRESENTATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Targets and Backgrounds - Characterization and Representation CY APR 17-19, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93943. NR 0 TC 4 Z9 4 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1822-6 J9 P SOC PHOTO-OPT INS PY 1995 VL 2469 BP 393 EP 403 DI 10.1117/12.210607 PG 11 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BD42C UT WOS:A1995BD42C00038 ER PT B AU HIGHLEY, SR KELLER, MR MCCOY, B POE, G AF HIGHLEY, SR KELLER, MR MCCOY, B POE, G BE Watkins, WR Clement, D TI Passive and active bistatic target and background studies at 95 GHz SO TARGETS AND BACKGROUNDS: CHARACTERIZATION AND REPRESENTATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Targets and Backgrounds - Characterization and Representation CY APR 17-19, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE RADIOMETRY; PASSIVE MICROWAVE; BISTATIC; TARGET DETECTION; DUAL POLARIZED RADIOMETER; IMAGER 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 0-8194-1822-6 J9 P SOC PHOTO-OPT INS PY 1995 VL 2469 BP 506 EP 516 DI 10.1117/12.210619 PG 11 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BD42C UT WOS:A1995BD42C00049 ER PT B AU SHAFFER, WA JOHNSON, RO AF SHAFFER, WA JOHNSON, RO BE Watkins, WR Clement, D TI Infrared multispectral field measurements for the joint multispectral program SO TARGETS AND BACKGROUNDS: CHARACTERIZATION AND REPRESENTATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Targets and Backgrounds - Characterization and Representation CY APR 17-19, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE MULTISPECTRAL INFRARED; FIELD MEASUREMENTS; BACKGROUNDS; MILITARY TARGETS; FOURIER TRANSFORM SPECTROSCOPY C1 USN,RES LAB,WASHINGTON,DC 20375. 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 0-8194-1822-6 J9 P SOC PHOTO-OPT INS PY 1995 VL 2469 BP 537 EP 547 DI 10.1117/12.210621 PG 11 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BD42C UT WOS:A1995BD42C00052 ER PT J AU Doyle, JD Hodur, RM AF Doyle, JD Hodur, RM GP AMER METEOROL SOC TI Mesoscale frontal waves in the coastal zone SO TENTH CONFERENCE ON ATMOSPHERIC AND OCEANIC WAVES AND STABILITY LA English DT Proceedings Paper CT 10th Conference on Atmospheric and Oceanic Waves and Stability CY JUN 05-09, 1995 CL BIG SKY, MT SP Amer Meteorol Soc C1 USN,RES LAB,MONTEREY,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1995 BP 41 EP 42 PG 2 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA BE95S UT WOS:A1995BE95S00023 ER PT J AU Reynolds, C Gelaro, R Murphree, T AF Reynolds, C Gelaro, R Murphree, T GP AMER METEOROL SOC TI Observed and simulated relationships between large scale atmospheric waves and the background flow SO TENTH CONFERENCE ON ATMOSPHERIC AND OCEANIC WAVES AND STABILITY LA English DT Proceedings Paper CT 10th Conference on Atmospheric and Oceanic Waves and Stability CY JUN 05-09, 1995 CL BIG SKY, MT SP Amer Meteorol Soc C1 USN,RES LAB,MONTEREY,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1995 BP 143 EP 144 PG 2 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA BE95S UT WOS:A1995BE95S00076 ER PT J AU Gelaro, R Buizza, R Klinker, E Molteni, F Palmer, TN AF Gelaro, R Buizza, R Klinker, E Molteni, F Palmer, TN GP AMER METEOROL SOC TI Sensitivity analysis and singular vector instabilities in a primitive equation model SO TENTH CONFERENCE ON ATMOSPHERIC AND OCEANIC WAVES AND STABILITY LA English DT Proceedings Paper CT 10th Conference on Atmospheric and Oceanic Waves and Stability CY JUN 05-09, 1995 CL BIG SKY, MT SP Amer Meteorol Soc C1 USN,RES LAB,MONTEREY,CA 93943. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1995 BP 239 EP 240 PG 2 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA BE95S UT WOS:A1995BE95S00126 ER PT B AU KULOWITCH, P PEREZ, I GRANATA, D AF KULOWITCH, P PEREZ, I GRANATA, D BE Semanovich, SA TI FLASH INFRARED THERMOGRAPHY FOR NDT/I/E OF NAVAL AIRCRAFT SO THERMOSENSE XVII: AN INTERNATIONAL CONFERENCE ON THERMAL SENSING AND IMAGING DIAGNOSTIC APPLICATIONS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT International Conference on Thermal Sensing and Imaging Diagnostic Applications (Thermosense XVII) CY APR 19-21, 1995 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE FLASH INFRARED THERMOGRAPHY; COMPOSITE MATERIALS; POROSITY; CORROSION; COATINGS; NONDESTRUCTIVE TESTING C1 USN,CTR AIR WARFARE,DIV AIRCRAFT,WARMINSTER,PA 18974. 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 0-8194-1826-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2473 BP 252 EP 262 DI 10.1117/12.204861 PG 11 WC Remote Sensing SC Remote Sensing GA BC84Y UT WOS:A1995BC84Y00027 ER PT S AU PROKES, SM AF PROKES, SM BE Baker, SP Ross, CA Townsend, PH Volkert, CA Borgesen, P TI Stress and its effect on intermixing in Si1-xGex/Si superlattices SO THIN FILMS: STRESSES AND MECHANICAL PROPERTIES V SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Thin Films - Stresses and Mechanical Properties V, at the 1994 Fall Meeting of the Materials-Research-Society CY NOV 28-DEC 02, 1994 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 1-55899-257-X J9 MATER RES SOC SYMP P PY 1995 VL 356 BP 3 EP 14 PG 12 WC Materials Science, Coatings & Films SC Materials Science GA BD53A UT WOS:A1995BD53A00001 ER PT B AU WHITLOCK, RR WARK, JS AF WHITLOCK, RR WARK, JS BE Rentzepis, PM TI X-ray diffraction by crystals during shocks SO TIME-RESOLVED ELECTRON AND X-RAY DIFFRACTION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1st International Conference on Time-Resolved Electron and X-Ray Diffraction CY JUL 13-14, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE PULSED X-RAY DIFFRACTION; LASER PLASMA; LASER SHOCK; STRAIN; FLASH X RAYS C1 USN,RES LAB,DYNAM SOLIDS BRANCH,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 0-8194-1880-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2521 BP 220 EP 231 DI 10.1117/12.218354 PG 12 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BE06R UT WOS:A1995BE06R00020 ER PT B AU Moyer, D AF Moyer, D BE Slama, K TI Tobacco use in the US military - Scope of the problem and strategies for solution SO TOBACCO AND HEALTH LA English DT Proceedings Paper CT 9th World Conference on Tobacco and Health CY OCT 10-14, 1994 CL PARIS, FRANCE SP WHO, Int Union Against Canc, Int Union Against Tuberculosis & Lung Dis, Int Soc & Federat Cardiol, Int Union Hlth Promot & Educ, Int Org Consumers Unions C1 USN HOSP,ALLERGY CLIN,OAKLAND,CA. 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 0-306-45111-5 PY 1995 BP 579 EP 579 PG 1 WC Public, Environmental & Occupational Health SC Public, Environmental & Occupational Health GA BE95N UT WOS:A1995BE95N00120 ER PT J AU GODIN, CS HE, J DRERUP, JM WYMAN, J AF GODIN, CS HE, J DRERUP, JM WYMAN, J TI EFFECT OF PROPYLENE-GLYCOL 1,2-DINITRATE ON CEREBRAL BLOOD-FLOW IN RATS - A POTENTIAL BIOMARKER FOR VASCULAR HEADACHE SO TOXICOLOGY LETTERS LA English DT Article DE PROPYLENE GLYCOL DINITRATE; BLOOD PRESSURE; NITRATE ESTERS; CEREBRAL BLOOD FLOW; VASCULAR HEADACHE; METABOLISM ID SMOOTH-MUSCLE; RABBIT AORTA; CYCLIC-GMP; ORGANIC NITRATES; NITRIC-OXIDE; RELAXATION; BIOTRANSFORMATION; MECHANISM AB Two measurable indices of toxicity that can be correlated with exposure to propylene glycol dinitrate (PGDN) were evaluated along with its metabolism. Propylene glycol dinitrate was administered by rapid i.v. injection to male Fischer-344 rats. These rats demonstrated a dose-response of blood pressure (BP) to doses of PGDN ranging from 0.1 to 30 mg/kg; the maximum fall in systolic BP occurred within 1 min of dosing, The i.v. administration of PGDN to separate groups of animals resulted in an increase in cerebral blood flow that was correlated with the dose, but a clear dose-response was not obtained. C1 MANTECH ENVIRONM TECHNOL INC,DAYTON,OH. USN,MED RES INST,TOXICOL DETACHMENT,WRIGHT PATTERSON AFB,OH 45433. NR 22 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCI PUBL IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0378-4274 J9 TOXICOL LETT JI Toxicol. Lett. PD JAN PY 1995 VL 75 IS 1-3 BP 59 EP 68 DI 10.1016/0378-4274(94)03156-2 PG 10 WC Toxicology SC Toxicology GA QG739 UT WOS:A1995QG73900006 PM 7863538 ER PT J AU WYMAN, J STOKES, JS GOEHRING, M BURING, M MOORE, T AF WYMAN, J STOKES, JS GOEHRING, M BURING, M MOORE, T TI DATA-COLLECTION INTERFACE FOR ISOLATED-PERFUSED RAT-LIVER - RECORDING OXYGEN-CONSUMPTION, PERFUSION-PRESSURE, AND PH SO TOXICOLOGY METHODS LA English DT Article DE DATA COLLECTION; LIVER PERFUSION ID LUNG AB A computer-aided data collection system was developed for use with an existing isolated rat liver perfusion apparatus. The system monitors and records perfusion time, oxygen consumption, perfusion pressure, and pH. Maintenance of perfusate pH is also accomplished using an electronically controlled solenoid valve for delivery of 95%/5% O-2/CO2 gas to the perfusion gas exchange system. Descriptions of software and hardware required to develop this system are provided. C1 USN,MED RES INST DETACHMENT TOXICOL,DAYTON,OH. RP WYMAN, J (reprint author), MANTECH ENVIRONM TECHNOL INC,POB 31009,DAYTON,OH 45437, USA. NR 20 TC 7 Z9 7 U1 0 U2 0 PU TAYLOR & FRANCIS PI BRISTOL PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598 SN 1051-7235 J9 TOXICOL METHOD JI Toxicol. Method. PD JAN-MAR PY 1995 VL 5 IS 1 BP 1 EP 14 DI 10.3109/15376519509066113 PG 14 WC Toxicology SC Toxicology GA RV053 UT WOS:A1995RV05300002 ER PT J AU NIEMYER, ES AF NIEMYER, ES TI THE CASE FOR CASE-STUDIES SO TRAINING & DEVELOPMENT LA English DT Article RP NIEMYER, ES (reprint author), USN HOSP,NURSE CORPS,CAMP PENDLETON,CA 92055, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER SOC TRAINING DEVELOP INC PI ALEXANDRIA PA 1640 KING ST, BOX 1443, ALEXANDRIA, VA 22313-2043 SN 1055-9760 J9 TRAINING DEV JI Train. Dev. PD JAN PY 1995 VL 49 IS 1 BP 50 EP 52 PG 3 WC Business SC Business & Economics GA QB899 UT WOS:A1995QB89900011 ER PT B AU LEVITT, HL ALEXANDER, EM TSE, AY SPEZIO, AE AF LEVITT, HL ALEXANDER, EM TSE, AY SPEZIO, AE BE Casasent, DP TI Superresolution precision direction-finding techniques and measurements SO TRANSITION OF OPTICAL PROCESSORS INTO SYSTEMS 1995 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Transition of Optical Processors into Systems 1995 CY APR 18, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 1 Z9 1 U1 0 U2 2 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1842-0 J9 P SOC PHOTO-OPT INS PY 1995 VL 2489 BP 95 EP 106 DI 10.1117/12.212033 PG 12 WC Acoustics; Remote Sensing; Optics SC Acoustics; Remote Sensing; Optics GA BD49M UT WOS:A1995BD49M00011 ER PT B AU SPEZIO, AE AF SPEZIO, AE BE Casasent, DP TI Electronic warfare (EW) channelizer and precision direction finder (PDF) applications SO TRANSITION OF OPTICAL PROCESSORS INTO SYSTEMS 1995 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Transition of Optical Processors into Systems 1995 CY APR 18, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 USN,RES LAB,WASHINGTON,DC 20375. 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 0-8194-1842-0 J9 P SOC PHOTO-OPT INS PY 1995 VL 2489 BP 116 EP 127 DI 10.1117/12.212035 PG 12 WC Acoustics; Remote Sensing; Optics SC Acoustics; Remote Sensing; Optics GA BD49M UT WOS:A1995BD49M00013 ER PT B AU SLETTEN, MA TRIZNA, DB AF SLETTEN, MA TRIZNA, DB BE Carin, L Felsen, LB TI Ultra-wideband, polarimetric radar studies of spilling breakers SO ULTRA-WIDEBAND, SHORT-PULSE ELECTROMAGNETICS 2 LA English DT Proceedings Paper CT 2nd International Conference on Ultra-Wideband/Short-Pulse (UWB/SP) Electromagnetics CY APR 07-09, 1994 CL POLYTECH UNIV, WEBER RES INST, BROOKLYN, NY HO POLYTECH UNIV, WEBER RES INST C1 USN,RES LAB,WASHINGTON,DC 20375. 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 0-306-45002-X PY 1995 BP 149 EP 155 PG 3 WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic; Remote Sensing SC Engineering; Remote Sensing GA BD80K UT WOS:A1995BD80K00017 ER PT B AU ROBERTSON, RC MORGAN, MA AF ROBERTSON, RC MORGAN, MA BE Carin, L Felsen, LB TI Ultra-wideband impulse receiving antenna design and evaluation SO ULTRA-WIDEBAND, SHORT-PULSE ELECTROMAGNETICS 2 LA English DT Proceedings Paper CT 2nd International Conference on Ultra-Wideband/Short-Pulse (UWB/SP) Electromagnetics CY APR 07-09, 1994 CL POLYTECH UNIV, WEBER RES INST, BROOKLYN, NY HO POLYTECH UNIV, WEBER RES INST C1 USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943. NR 0 TC 1 Z9 4 U1 0 U2 1 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-45002-X PY 1995 BP 179 EP 186 PG 4 WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic; Remote Sensing SC Engineering; Remote Sensing GA BD80K UT WOS:A1995BD80K00020 ER PT B AU BERNHARDT, PA AF BERNHARDT, PA BE Cohn, GE Lerner, JM Liddane, KJ Scheeline, A Soper, SA Katzir, A TI INCREASED PHOTON COUNTING EFFICIENCY FOR MULTI-SPECTRAL IMAGING USING ROTATIONAL SPECTRO-TOMOGRAPHY SO ULTRASENSITIVE INSTRUMENTATION FOR DNA SEQUENCING AND BIOCHEMICAL DIAGNOSTICS, PROCEEDINGS OF SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Ultrasensitive Instrumentation for DNA Sequencing and Biochemical Diagnostics CY FEB 08-10, 1995 CL SAN JOSE, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,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 0-8194-1733-5 J9 P SOC PHOTO-OPT INS PY 1995 VL 2386 BP 288 EP 302 DI 10.1117/12.206030 PG 15 WC Biochemistry & Molecular Biology; Engineering, Biomedical; Instruments & Instrumentation; Spectroscopy SC Biochemistry & Molecular Biology; Engineering; Instruments & Instrumentation; Spectroscopy GA BC78Q UT WOS:A1995BC78Q00030 ER PT J AU HOOD, JA MIGNOGNA, RB AF HOOD, JA MIGNOGNA, RB TI DETERMINATION OF ELASTIC-MODULI IN ANISOTROPIC MEDIA FROM ULTRASONIC CONTACT MEASUREMENTS SO ULTRASONICS LA English DT Article DE ANISOTROPY; ELASTIC CONSTANTS; PHYSICAL MODELING; FRACTURES CRACKS ID STRATIFIED MEDIA; WAVE ANISOTROPY; SLIP AB When laminae are smaller than the wavelengths that measure them, a composite appears homogeneous and anisotropic. Composites are often subjected to high temperature gradients during their fabrication which can result in residual stresses, and damage in the form of oriented microcracking may result. Oriented microcracks will render a normally isotropic material anisotropic. Similarly, the resultant of a cracked anisotropic composite is a complex combination of the two component anisotropies. This work attempts to separate experimentally the anisotropic effects of vertically oriented microcracks from a background that is already anisotropic. A physical model was constructed in which vertical fracturing was superposed on a transversely isotropic material. The final specimen displayed orthorhombic symmetry. Laboratory measurements were made at ultrasonic frequencies to determine the elastic moduli of this material. From these moduli, the elastic properties of the original background, as if it had no vertical cracks, were determined as well as the additional compliance that the cracks add to the system. C1 USN,MECH MAT BRANCH,CODE 6380,WASHINGTON,DC 20375. RP HOOD, JA (reprint author), UNIV MIAMI,ROSENSTIEL SCH MARINE & ATMOSPHER SCI,MIAMI,FL 33149, USA. NR 13 TC 3 Z9 3 U1 0 U2 1 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA LINACRE HOUSE JORDAN HILL, OXFORD, OXON, ENGLAND OX2 8DP SN 0041-624X J9 ULTRASONICS JI Ultrasonics PD JAN PY 1995 VL 33 IS 1 BP 45 EP 54 DI 10.1016/0041-624X(95)92036-4 PG 10 WC Acoustics; Radiology, Nuclear Medicine & Medical Imaging SC Acoustics; Radiology, Nuclear Medicine & Medical Imaging GA QG747 UT WOS:A1995QG74700006 ER PT J AU BAQAR, S BOURGEOIS, AL SCHULTHEISS, PJ WALKER, RI ROLLINS, DM HABERBERGER, RL PAVLOVSKIS, OR AF BAQAR, S BOURGEOIS, AL SCHULTHEISS, PJ WALKER, RI ROLLINS, DM HABERBERGER, RL PAVLOVSKIS, OR TI SAFETY AND IMMUNOGENICITY OF A PROTOTYPE ORAL WHOLE-CELL KILLED CAMPYLOBACTER VACCINE ADMINISTERED WITH A MUCOSAL ADJUVANT IN NONHUMAN-PRIMATES SO VACCINE LA English DT Article DE CAMPYLOBACTER VACCINE; HEAT-LABILE ESCHERICHIA COLI ENTEROTOXIN; PRIMATES ID SALMONELLA-TYPHI; CHOLERA VACCINE; B-SUBUNIT; ESCHERICHIA-COLI; PERIPHERAL-BLOOD; PROTEIN ANTIGENS; SECRETING CELLS; IMMUNIZATION; TOXIN; IMMUNITY AB The safety and immunogenicity of two prototype oral Campylobacter killed whole-cell (CWC) vaccines were tested in rhesus monkeys. Animals were immunized with a primary two-dose ser ies (days 0 and 14) of vaccine consisting of CWC (10(10) particles/dose) given alone or in combination with 0.5-1000 mu g of the heat-labile enterotoxin of Escherichia coli as an oral adjuvant (OA). A booster vaccination, 4 weeks after primary immunization, was given to animals receiving CWC alone or supplemented with 0.5, 5 or 50 mu g of OA. Both CWC and CWC-OA were well tolerated with no adverse side-effects noted Campylobacter-specific as well as adjuvant-specific antibody-secreting cells (ASCs) were determined in peripheral blood collected 7 days after each vaccine dose. Campylobacter-specific IgA ASC responses were enhanced by OA in a dose-dependent manner (p = 0.025), while IgG ASC responses were not. Seroconversions (both IgA and IgG) to Campylobacter antigens were also enhanced in monkeys receiving adjuvanted vaccine, No significant booster vaccination effect was observed in circulating ASCs in any of the immunization groups. In vitro T-cell proliferative responses to Campylobacter jejuni antigens were somewhat enhanced in both the CWC and CWC-OA immunization groups. These results demonstrate that CWC-OA is safe and superior to CWC alone in its ability to stimulate both local and systemic Campylobacter-specific IgA and IgG responses in primates and they support its further evaluation in human clinical studies. C1 WALTER REED ARMY MED CTR, WALTER REED ARMY INST RES, DIV VET MED, WASHINGTON, DC 20307 USA. NATL NAVAL MED CTR, BETHESDA, MD 20889 USA. RP BAQAR, S (reprint author), USN, MED RES INST, ENTER DIS PROGRAM, 8901 WISCONSIN AVE, BETHESDA, MD 20889 USA. NR 30 TC 49 Z9 49 U1 0 U2 2 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA LINACRE HOUSE JORDAN HILL, OXFORD, OXON, ENGLAND OX2 8DP SN 0264-410X J9 VACCINE JI Vaccine PD JAN PY 1995 VL 13 IS 1 BP 22 EP 28 DI 10.1016/0264-410X(95)80006-Y PG 7 WC Immunology; Medicine, Research & Experimental SC Immunology; Research & Experimental Medicine GA QF019 UT WOS:A1995QF01900005 PM 7539199 ER PT J AU NISHIZAWA, T KURATH, G WINTON, JR AF NISHIZAWA, T KURATH, G WINTON, JR TI NUCLEOTIDE-SEQUENCE OF THE 2 MATRIX PROTEIN GENES (M1 AND M2) OF HIRAME RHABDOVIRUS (HRV), A FISH RHABDOVIRUS SO VETERINARY RESEARCH LA English DT Article; Proceedings Paper CT 3rd International Symposium on Viruses of Lower Vertebrates CY MAR 15-17, 1995 CL INRA CAMPUS, JOUY EN JOSAS, FRANCE SP INRA, Anim Hlth Dept, European Community, Biomar SA, Boehringer Mannheim France SA, Eurogentec SA, Federat Francaise Aquaculture, Gheerbrant & Schweppes HO INRA CAMPUS DE HIRAME RHABDOVIRUS; HRV; LYSSAVIRUS; MATRIX PROTEIN; NUCLEOTIDE SEQUENCE ID HEMATOPOIETIC NECROSIS VIRUS; STRUCTURAL PROTEINS; GENOME AB We have cloned and sequenced the M1 and M2 protein genes of hirame rhabdovirus (HRV). The M1 protein gene was 684 nucleotides long, encoding 227 amino acids. Sequence comparisons between the M1 protein genes of HRV and infectious hematopoietic necrosis virus (IHNV) or viral hemorrhagic septicemia virus (VHSV) revealed similarities of 65.1 and 40.8% at the nucleotide level and 81.1 and 44.8% at the amino acid level. The M2 protein gene was 582 nucleotides long, encoding 193 amino acids. Sequence comparisons between the M2 protein genes of HRV and those of IHNV and VHSV revealed similarities of 71.3 and 45.4% at the nucleotide level and 86.0 and 57.0% at the amino acid level, respectively. C1 USN STN,NW BIOL SCI CTR,NATL BIOL SERV,SEATTLE,WA 98115. RP NISHIZAWA, T (reprint author), HIROSHIMA UNIV,FAC APPL BIOL SCI,HIGASHIHIROSHIMA 739,JAPAN. NR 10 TC 6 Z9 9 U1 0 U2 0 PU EDITIONS SCIENTIFIQUES ELSEVIER PI PARIS CEDEX 15 PA 141 RUE JAVEL, 75747 PARIS CEDEX 15, FRANCE SN 0928-4249 J9 VET RES JI Vet. Res. PY 1995 VL 26 IS 5-6 BP 408 EP 412 PG 5 WC Veterinary Sciences SC Veterinary Sciences GA TA316 UT WOS:A1995TA31600011 PM 8581014 ER PT B AU Booth, A AF Booth, A BE Barrett, E Cramer, P TI The architecture of loss: Teaching Jacob's Room as a war novel SO VIRGINIA WOOLF - RE: READING, RE: WRITING, RE: TEACHING LA English DT Proceedings Paper CT 4th Annual Conference on Virginia Woolf - Re: Reading, Re: Writing, Re: Teaching CY JUN 09-12, 1994 CL BARD COLLEGE, ANNANDALE ON HUDSON, NY HO BARD COLLEGE C1 USN ACAD,ANNAPOLIS,MD 21402. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PACE UNIV PRESS PI NEW YORK PA NEW YORK, NY 10038 BN 0-944473-22-9 PY 1995 BP 65 EP 72 PG 8 WC Literature; Women's Studies SC Literature; Women's Studies GA BE57F UT WOS:A1995BE57F00013 ER PT B AU MACEDONIA, MR ZYDA, MJ PRATT, DR BRUTZMAN, DP BARHAM, PT AF MACEDONIA, MR ZYDA, MJ PRATT, DR BRUTZMAN, DP BARHAM, PT GP IEEE TI EXPLOITING REALITY WITH MULTICAST GROUPS - A NETWORK ARCHITECTURE FOR LARGE-SCALE VIRTUAL ENVIRONMENTS SO VIRTUAL REALITY ANNUAL INTERNATIONAL SYMPOSIUM '95, PROCEEDINGS LA English DT Proceedings Paper CT Virtual Reality Annual International Symposium 95 (VRAIS 95) CY MAR 11-15, 1995 CL RESEARCH TRIANGLE PK, NC SP IEEE, COMP SOC, TECH COMM COMP GRAPH, IEEE, NEURAL NETWORKS COUNCIL, TECH COMM VIRTUAL REALITY DE VIRTUAL REALITY; DISTRIBUTED INTERACTIVE SIMULATION; INTERNET PROTOCOL MULTICAST; DISTRIBUTED INTERACTIVE ENTERTAINMENT; LARGE-SCALE VIRTUAL ENVIRONMENTS C1 USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943. NR 0 TC 12 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 BN 0-8186-7084-3 PY 1995 BP 2 EP 10 PG 9 WC Computer Science, Artificial Intelligence SC Computer Science GA BC88R UT WOS:A1995BC88R00001 ER PT B AU ZYDA, MJ AF ZYDA, MJ GP IEEE TI NETWORKED VIRTUAL ENVIRONMENTS SO VIRTUAL REALITY ANNUAL INTERNATIONAL SYMPOSIUM '95, PROCEEDINGS LA English DT Proceedings Paper CT Virtual Reality Annual International Symposium 95 (VRAIS 95) CY MAR 11-15, 1995 CL RESEARCH TRIANGLE PK, NC SP IEEE, COMP SOC, TECH COMM COMP GRAPH, IEEE, NEURAL NETWORKS COUNCIL, TECH COMM VIRTUAL REALITY DE VIRTUAL REALITY; DISTRIBUTED INTERACTIVE SIMULATION; DISTRIBUTED INTERACTIVE ENTERTAINMENT; LARGE-SCALE VIRTUAL ENVIRONMENTS C1 USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943. 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 0-8186-7084-3 PY 1995 BP 230 EP 231 PG 2 WC Computer Science, Artificial Intelligence SC Computer Science GA BC88R UT WOS:A1995BC88R00029 ER PT B AU HAMMEL, S PLATT, N AF HAMMEL, S PLATT, N BE Melter, RA Wu, AY Bookstein, FL Green, WDK TI Topological description of mirage effects SO VISION GEOMETRY IV SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Vision Geometry IV Conference CY JUL 13-14, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers C1 USN,CTR SURFACE WARFARE,NONLINEAR DYNAM & WAVELETS GRP,WHITE OAK,MD 20903. 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 0-8194-1932-X J9 P SOC PHOTO-OPT INS PY 1995 VL 2573 BP 398 EP 406 PG 9 WC Computer Science, Software Engineering; Mathematics, Applied; Optics SC Computer Science; Mathematics; Optics GA BD88U UT WOS:A1995BD88U00038 ER PT B AU Cross, RA AF Cross, RA BE Nielson, G Silver, D TI Interactive realism for visualization using ray tracing SO VISUALIZATION '95 - PROCEEDINGS LA English DT Proceedings Paper CT 6th Annual IEEE Conference on Visualization CY OCT 29-NOV 03, 1995 CL ATLANTA, GA SP IEEE Comp Soc Tech Comm Comp Graph C1 USN,RES LAB,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 BN 0-7803-3127-3 PY 1995 BP 19 EP 26 DI 10.1109/VISUAL.1995.480791 PG 8 WC Computer Science, Software Engineering SC Computer Science GA BE57C UT WOS:A1995BE57C00003 ER PT J AU ANCONA, MG AF ANCONA, MG TI HYDRODYNAMIC MODELS OF SEMICONDUCTOR ELECTRON-TRANSPORT AT HIGH FIELDS SO VLSI DESIGN LA English DT Article DE HIGH-FIELD TRANSPORT; VELOCITY OVERSHOOT; HYDRODYNAMICS; CONTINUUM THEORY; SUBMICRON SEMICONDUCTOR DEVICES; RATE EFFECTS; VISCOSITY ID INCLUDING VELOCITY OVERSHOOT; FLUX-CORRECTED TRANSPORT; DRIFT-DIFFUSION MODEL; CHARGE TRANSPORT; CARRIER TRANSPORT; BAND-STRUCTURE; DEVICE MODEL; GAAS-MESFET; SIMULATION; FLOW AB Hydrodynamic or continuum descriptions of electron transport have long been used for modeling and simulating semiconductor devices. In this paper, we use classical field theory ideas to discuss the physical foundations of such descriptions as applied specifically to high-field transport regimes. The classical field theory development of these types of models is of interest because it differs significantly from and may be viewed as complementary to conventional derivations based on the Boltzmann equation. After outlining the general field theoretic principles upon which our development of fluid-based high-field transport descriptions is based, we study several specific models both analytically and using numerical simulation. These models provide an overall framework for understanding and extending various theories which have appeared in the literature. Most importantly, they emphasize the importance of including memory or history effects and viscosity in describing high-field transport. In all of this our aim is a unified and synoptic view unencumbered with microscopic details. Obtaining quantitative agreement with specific experiments and/or microscopic simulations is only of secondary importance. We share the view that continuum approaches can provide succinct and computationally-efficient models needed for current and future semiconductor device analysis and engineering. At the same time, we believe that these models need not be phenomenological but can be given solid physical foundation in macroscopic principles. C1 USN, RES LAB, WASHINGTON, DC 20375 USA. RP LOS ALAMOS NATL LAB, CTR NONLINEAR STUDIES, LOS ALAMOS, NM 87545 USA. NR 40 TC 3 Z9 3 U1 0 U2 2 PU HINDAWI PUBLISHING CORP PI NEW YORK PA 315 MADISON AVE 3RD FLR, STE 3070, NEW YORK, NY 10017 USA SN 1065-514X EI 1563-5171 J9 VLSI DES JI VLSI Des. PY 1995 VL 3 IS 2 BP 101 EP 114 DI 10.1155/1995/85107 PG 14 WC Computer Science, Hardware & Architecture SC Computer Science GA TE731 UT WOS:A1995TE73100002 ER PT B AU Beall, JH Guillory, J AF Beall, JH Guillory, J BE Giovannelli, F Mannocchi, G TI Jets in the broad line region of AGN SO VOLCANO WORKSHOP 1994 - FRONTIER OBJECTS IN ASTROPHYSICS AND PARTICLE PHYSICS SE ITALIAN PHYSICAL SOCIETY CONFERENCE PROCEEDINGS (IPS) LA English DT Proceedings Paper CT Vulcano Workshop 1994 on Frontier Objects in Astrophysics and Particle Physics CY MAY 23-28, 1994 CL VULCANO, ITALY SP CNR, Ist Astrofis Spaziale, CNR Ist Cosmogeofis, Ist Nazl Fis Nucl C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITRICE COMPOSITORI PI BOLOGNA PA VIA STALINGRADO 97/2, 40128 BOLOGNA, ITALY BN 88-7794-068-9 J9 ITAL PHY SO PY 1995 VL 47 BP 331 EP 340 PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BE36Z UT WOS:A1995BE36Z00026 ER PT B AU HEWER, GA KENNEY, C KUO, W PETERSON, L AF HEWER, GA KENNEY, C KUO, W PETERSON, L BE Szu, HH TI MULTIRESOLUTION SHAPE ANALYSIS OF SMALL OBJECTS USING PDE CURVATURE AND WAVELET EDGES SO WAVELET APPLICATIONS II, PTS 1 AND 2 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Conference on Wavelet Applications CY APR 17-21, 1995 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE WAVELETS; MULTIRESOLUTION; EDGE DETECTION; CURVATURE; PDE; TOPHAT C1 USN,CTR AIR WARFARE,DIV WEAP,CHINA LAKE,CA 93555. 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 0-8194-1844-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2491 BP 14 EP 25 DI 10.1117/12.205387 PN 1 & 2 PG 12 WC Computer Science, Artificial Intelligence; Engineering, Biomedical; Remote Sensing; Optics; Physics, Mathematical; Telecommunications SC Computer Science; Engineering; Remote Sensing; Optics; Physics; Telecommunications GA BC84Z UT WOS:A1995BC84Z00002 ER PT B AU SZU, H HSU, C GARCIA, J TELFER, B AF SZU, H HSU, C GARCIA, J TELFER, B BE Szu, HH TI FINGERPRINT DATA ACQUISITION, DE-SMEARING, WAVELET FEATURE EXTRACTION & IDENTIFICATION SO WAVELET APPLICATIONS II, PTS 1 AND 2 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Conference on Wavelet Applications CY APR 17-21, 1995 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE DATA COMPRESSION; FINGERPRINT; CLASSIFICATION; FBI; WAVELET C1 USN,CTR SURFACE,DAHLGREN DIV,INFORMAT SCI GRP,SILVER SPRING,MD 20903. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1844-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2491 BP 96 EP 118 DI 10.1117/12.205376 PN 1 & 2 PG 23 WC Computer Science, Artificial Intelligence; Engineering, Biomedical; Remote Sensing; Optics; Physics, Mathematical; Telecommunications SC Computer Science; Engineering; Remote Sensing; Optics; Physics; Telecommunications GA BC84Z UT WOS:A1995BC84Z00011 ER PT B AU IMPAGLIAZZO, J GREENE, W HUYNH, QY AF IMPAGLIAZZO, J GREENE, W HUYNH, QY BE Szu, HH TI WAVELET IMAGE COMPRESSION ALGORITHM FOR SIDE SCAN SONAR AND TELERADIOLOGY SO WAVELET APPLICATIONS II, PTS 1 AND 2 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Conference on Wavelet Applications CY APR 17-21, 1995 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 USN,UNDERSEA WARFARE CTR DIV,NEWPORT,RI 02841. 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 0-8194-1844-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2491 BP 162 EP 172 DI 10.1117/12.205383 PN 1 & 2 PG 11 WC Computer Science, Artificial Intelligence; Engineering, Biomedical; Remote Sensing; Optics; Physics, Mathematical; Telecommunications SC Computer Science; Engineering; Remote Sensing; Optics; Physics; Telecommunications GA BC84Z UT WOS:A1995BC84Z00016 ER PT B AU CHEN, VC AF CHEN, VC BE Szu, HH TI RECONSTRUCTION OF INVERSE SYNTHETIC APERTURE RADAR IMAGE USING ADAPTIVE TIME-FREQUENCY WAVELET TRANSFORM SO WAVELET APPLICATIONS II, PTS 1 AND 2 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Conference on Wavelet Applications CY APR 17-21, 1995 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE ADAPTIVE WAVELET TRANSFORM; INVERSE SYNTHETIC APERTURE RADAR IMAGING; JOINT TIME-FREQUENCY REPRESENTATION; MOTION COMPENSATION; AUTOFOCUS C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 31 Z9 32 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1844-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2491 BP 373 EP 386 DI 10.1117/12.205404 PN 1 & 2 PG 14 WC Computer Science, Artificial Intelligence; Engineering, Biomedical; Remote Sensing; Optics; Physics, Mathematical; Telecommunications SC Computer Science; Engineering; Remote Sensing; Optics; Physics; Telecommunications GA BC84Z UT WOS:A1995BC84Z00035 ER PT B AU TELFER, BA SZU, HH DOBECK, GJ AF TELFER, BA SZU, HH DOBECK, GJ BE Szu, HH TI ADAPTIVE TIME-FREQUENCY CLASSIFICATION OF ACOUSTIC BACKSCATTER SO WAVELET APPLICATIONS II, PTS 1 AND 2 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Conference on Wavelet Applications CY APR 17-21, 1995 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 USN,CTR SURFACE WARFARE,DAHLGREN DIV,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 0-8194-1844-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2491 BP 451 EP 460 DI 10.1117/12.205411 PN 1 & 2 PG 10 WC Computer Science, Artificial Intelligence; Engineering, Biomedical; Remote Sensing; Optics; Physics, Mathematical; Telecommunications SC Computer Science; Engineering; Remote Sensing; Optics; Physics; Telecommunications GA BC84Z UT WOS:A1995BC84Z00042 ER PT B AU CARTER, PH AF CARTER, PH BE Laine, AF Unser, MA TI Supertransients in fluid flow noise SO WAVELET APPLICATIONS IN SIGNAL AND IMAGE PROCESSING III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1995 SPIE Conference on Wavelet Applications in Signal and Image Processing CY JUL 13-14, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE TRANSIENT DETECTION; WAVELETS; SOFT THRESHOLDING; SIGNAL ESTIMATION; SIGNAL RECOVERY; TRANSLATION INVARIANT TRANSFORMS C1 USN,CTR SURFACE WARFARE,NONLINEAR DYNAM & WAVELETS GRP,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 0-8194-1928-1 J9 P SOC PHOTO-OPT INS PY 1995 VL 2569 BP 175 EP 188 DI 10.1117/12.217573 PN 1&2 PG 14 WC Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic; Mathematics, Applied; Optics; Physics, Applied; Radiology, Nuclear Medicine & Medical Imaging SC Computer Science; Engineering; Mathematics; Optics; Physics; Radiology, Nuclear Medicine & Medical Imaging GA BE16C UT WOS:A1995BE16C00016 ER PT J AU KEATING, RM VYAS, AS AF KEATING, RM VYAS, AS TI REACTIVE ARTHRITIS FOLLOWING CLOSTRIDIUM-DIFFICILE COLITIS SO WESTERN JOURNAL OF MEDICINE LA English DT Article ID PSEUDOMEMBRANOUS COLITIS; REITERS-SYNDROME; MANIFESTATIONS; ENTERITIS RP KEATING, RM (reprint author), USN,MED CTR,DIV RHEUMATOL,SAN DIEGO,CA 92134, USA. NR 16 TC 13 Z9 13 U1 0 U2 0 PU CALIF MEDICAL ASSN PI SAN FRANCISCO PA 221 MAIN STREET, SAN FRANCISCO, CA 94105 SN 0093-0415 J9 WESTERN J MED JI West. J. Med. PD JAN PY 1995 VL 162 IS 1 BP 61 EP 63 PG 3 WC Medicine, General & Internal SC General & Internal Medicine GA QD496 UT WOS:A1995QD49600015 PM 7863666 ER PT B AU Skelton, EF Qadri, SB Osofsky, MS Drews, AR Broussard, PR Hu, JZ Finger, LW Vanderah, TA Kaiser, D Peng, JL Anlage, SM Greene, RL Giapintzakis, J AF Skelton, EF Qadri, SB Osofsky, MS Drews, AR Broussard, PR Hu, JZ Finger, LW Vanderah, TA Kaiser, D Peng, JL Anlage, SM Greene, RL Giapintzakis, J BE Yun, W TI Direct observation of microscopic inhomogeneities in high T-c superconductors using energy-dispersive diffraction of synchrotron produced x-rays SO X-RAY MICROBEAM TECHNOLOGY AND APPLICATIONS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on X-Ray Microbeam Technology and Applications CY JUL 11-12, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE superconductivity; microdiffraction; synchrotron x-rays; energy-dispersive diffraction; structural inhomogeneities C1 USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,WASHINGTON,DC 20375. RI Osofsky, Michael/A-1050-2010 NR 0 TC 6 Z9 6 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1875-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2516 BP 160 EP 169 DI 10.1117/12.221669 PG 2 WC Microscopy; Optics SC Microscopy; Optics GA BE29A UT WOS:A1995BE29A00015 ER PT J AU FLIPPENANDERSON, JL GEORGE, C BERTHA, CM RICE, KC AF FLIPPENANDERSON, JL GEORGE, C BERTHA, CM RICE, KC TI X-RAY CRYSTAL-STRUCTURES OF POTENT OPIOID RECEPTOR LIGANDS - ETONITAZENE, CIS-(+)-3-METHYLFENTANYL, ETORPHINE, DIPRENORPHINE, AND BUPRENORPHINE SO HETEROCYCLES LA English DT Article ID PHARMACOLOGICAL CHARACTERIZATION; ABSOLUTE-CONFIGURATION; FUNCTIONAL EXPRESSION; OPIATE RECEPTOR; CLONING; SUBTYPES; AGONIST; TOLERANCE; PEPTIDES; HYDRATE AB As a prelude to molecular modeling and other studies of the newly cloned and expressed mu, delta and kappa opioid receptor subtypes, X-Ray crystal structures were determined for etonitazene, (1) cis-(+)-3-methylfentanyl (4) and etorphine (6), three extremely potent opioid agonists. X-Ray crystal structures were also determined for diprenorphine 7, a potent opioid antagonist, and buprenorphine (8), a clinically useful mixed agonist-antagonist. Agonists (1), (4) and (6) are structurally diverse but have similar profiles while (7) and (8) have substantially different pharmacological profiles but differ structurally by only a methyl vs. a tertbutyl function. The present results should facilitate studies toward understanding the differences which underlie these observations on a molecular basis. C1 NIDDK,MED CHEM LAB,BETHESDA,MD 20982. RP FLIPPENANDERSON, JL (reprint author), USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375, USA. NR 49 TC 12 Z9 12 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0385-5414 J9 HETEROCYCLES JI Heterocycles PD DEC 31 PY 1994 VL 39 IS 2 BP 751 EP 766 PG 16 WC Chemistry, Organic SC Chemistry GA QC194 UT WOS:A1994QC19400035 ER PT J AU KING, SE PHILLIPS, GW HASKINS, PS MCKISSON, JE PIERCEY, RB MANIA, RC AF KING, SE PHILLIPS, GW HASKINS, PS MCKISSON, JE PIERCEY, RB MANIA, RC TI A SOLID-STATE COMPTON CAMERA FOR 3-DIMENSIONAL IMAGING SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th Symposium on Radiation Measurements and Applications CY MAY 16-19, 1994 CL ANN ARBOR, MI ID TELESCOPE AB A Compton camera was constructed using four individual high-purity germanium (HPGe) coaxial detectors in the front plane and four elements of a 15 element HPGe coaxial array in the back plane. Co-60, Ba-133, and Cs-137 sources were used in configurations that included single sources in positions covering the intended field-of-view and multiple sources of both identical isotopes and different isotopes. Experiments were also conducted with sources in waste-container sized attenuating media. This proof-of-concept experiment was designed to demonstrate non-tomographic three-dimensional imaging for the characterization of mixed waste containers. The present analysis demonstrates three-dimensional imaging of multiple sources at multiple energies and the imaging of sources within a waste-container sized attenuating medium. C1 INST SPACE SCI & TECHNOL,GAINESVILLE,FL 32609. SPARROW CORP,MISSISSIPPI STATE,MS 39762. KENT STATE UNIV,DIV MATH & SCI,FRANKFORT,KY 40601. RP KING, SE (reprint author), USN,RES LAB,CODE 6616,WASHINGTON,DC 20375, USA. NR 9 TC 9 Z9 9 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 DEC 30 PY 1994 VL 353 IS 1-3 BP 320 EP 323 DI 10.1016/0168-9002(94)91666-7 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA QB888 UT WOS:A1994QB88800079 ER PT J AU AUGUST, RA PHILLIPS, GW KING, SE CUTCHIN, JH AF AUGUST, RA PHILLIPS, GW KING, SE CUTCHIN, JH TI TREATY VERIFICATION WITH PASSIVE NEUTRON SIGNATURES SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th Symposium on Radiation Measurements and Applications CY MAY 16-19, 1994 CL ANN ARBOR, MI AB Cosmic ray interactions with materials result in secondary neutrons which are easily measurable. The magnitude of this neutron flux depends on geomagnetic latitude, altitude, and on the materials that constitute the local environment. In general the neutrons produced by cosmic rays in a given object depend on the atomic number, density, and total mass of the elements which constitute that object. Any massive object will have a unique ''neutron signature'' depending on its materials and structure. To test if this phenonemenon might be used to determine if a closed canister contains a specific object, such as a missile, we conducted a proof of concept study. The study had two parts, experimental and Monte Carlo simulations. The object was to perform measurements and simulations of a ''block missile mockup''. We constructed the mockup at approximately one-sixth the mass of a real missile. A clear neutron signature was observed from this mockup experimentally, and modeling predictions agreed well with the data. Predictions from our results indicate that a full sized missile should produce a very distinct signature. C1 SACHS FREEMAN ASSOCIATES INC,LANDOVER,MD 20785. RP AUGUST, RA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 5 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD DEC 30 PY 1994 VL 353 IS 1-3 BP 712 EP 715 DI 10.1016/0168-9002(94)91759-0 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA QB888 UT WOS:A1994QB88800172 ER PT J AU DANZL, DF POZOS, RS AF DANZL, DF POZOS, RS TI CURRENT CONCEPTS - ACCIDENTAL HYPOTHERMIA SO NEW ENGLAND JOURNAL OF MEDICINE LA English DT Review ID CARDIOPULMONARY BYPASS; PERITONEAL-LAVAGE; BODY-TEMPERATURE; ARREST; RESUSCITATION; COAGULATION; FAILURE; CPR C1 USN,HLTH RES CTR,DIV THERMAL,SAN DIEGO,CA 92152. RP DANZL, DF (reprint author), UNIV LOUISVILLE,DEPT EMERGENCY MED,LOUISVILLE,KY 40292, USA. NR 52 TC 195 Z9 203 U1 1 U2 5 PU MASS MEDICAL SOC PI BOSTON PA 10 SHATTUCK, BOSTON, MA 02115 SN 0028-4793 J9 NEW ENGL J MED JI N. Engl. J. Med. PD DEC 29 PY 1994 VL 331 IS 26 BP 1756 EP 1760 DI 10.1056/NEJM199412293312607 PG 5 WC Medicine, General & Internal SC General & Internal Medicine GA PZ266 UT WOS:A1994PZ26600007 PM 7984198 ER PT J AU PAPPAS, DP PRINZ, GA KETCHEN, MB AF PAPPAS, DP PRINZ, GA KETCHEN, MB TI SUPERCONDUCTING QUANTUM INTERFERENCE DEVICE MAGNETOMETRY DURING ULTRAHIGH-VACUUM GROWTH SO APPLIED PHYSICS LETTERS LA English DT Article ID FILMS; MAGNETIZATION C1 USN,RES LAB,WASHINGTON,DC 20375. IBM CORP,THOMAS J WATSON RES CTR,DIV RES,YORKTOWN HTS,NY 10598. NR 9 TC 8 Z9 8 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 DEC 26 PY 1994 VL 65 IS 26 BP 3401 EP 3403 DI 10.1063/1.112406 PG 3 WC Physics, Applied SC Physics GA PY280 UT WOS:A1994PY28000033 ER PT J AU HEAGY, JF CARROLL, TL PECORA, LM AF HEAGY, JF CARROLL, TL PECORA, LM TI EXPERIMENTAL AND NUMERICAL EVIDENCE FOR RIDDLED BASINS IN COUPLED CHAOTIC SYSTEMS SO PHYSICAL REVIEW LETTERS LA English DT Article ID SYNCHRONIZED CHAOS RP USN, RES LAB, CODE 6341, WASHINGTON, DC 20375 USA. OI Carroll, Thomas/0000-0002-2371-2049 NR 29 TC 192 Z9 193 U1 0 U2 2 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 DEC 26 PY 1994 VL 73 IS 26 BP 3528 EP 3531 DI 10.1103/PhysRevLett.73.3528 PG 4 WC Physics, Multidisciplinary SC Physics GA PY208 UT WOS:A1994PY20800010 ER PT J AU SPRANGLE, P KRALL, J ESAREY, E AF SPRANGLE, P KRALL, J ESAREY, E TI HOSE-MODULATION INSTABILITY OF LASER-PULSES IN PLASMAS SO PHYSICAL REVIEW LETTERS LA English DT Article ID FREE-ELECTRON LASER; ELECTROMAGNETIC-WAVES; ACCELERATION; BEAM RP SPRANGLE, P (reprint author), USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 27 TC 95 Z9 95 U1 0 U2 2 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 DEC 26 PY 1994 VL 73 IS 26 BP 3544 EP 3547 DI 10.1103/PhysRevLett.73.3544 PG 4 WC Physics, Multidisciplinary SC Physics GA PY208 UT WOS:A1994PY20800014 ER PT J AU GHOSH, A FITZGERALD, J GASSMAN, PG ALMLOF, J AF GHOSH, A FITZGERALD, J GASSMAN, PG ALMLOF, J TI ELECTRONIC DISTINCTION BETWEEN PORPHYRINS AND TETRAAZAPORPHYRINS - INSIGHTS FROM X-RAY PHOTOELECTRON-SPECTRA OF FREE-BASE PORPHYRIN, PORPHYRAZINE, AND PHTHALOCYANINE LIGANDS SO INORGANIC CHEMISTRY LA English DT Article ID SPECTROSCOPY; SCF; POLARIZATION; OXIDATION AB High-resolution nitrogen core X-ray photoelectron spectra are reported for free base octaethylporphyrin, octaethylporphyrazine, tetrabenzoporphyrin, and phthalocyanine. The spectra have been analyzed and assigned using all-electron ab initio Hartree-Fock calculations with basis sets of double-zeta or better quality. The results show that meso-tetraaza-substitution causes an increase of 0.2-0.45 eV in the core ionization potentials of the central nitrogens of porphyrin ligands, which implies a significantly more positive electrostatic potential in the central metal-binding region of a tetraazaporphyrin relative to a similarly substituted porphyrin. C1 UNIV MINNESOTA,MINNESOTA SUPERCOMP INST,MINNEAPOLIS,MN 55415. USN ACAD,DEPT CHEM,ANNAPOLIS,MD 21402. RP GHOSH, A (reprint author), UNIV MINNESOTA,DEPT CHEM,MINNEAPOLIS,MN 55455, USA. RI Ghosh, Abhik/G-8164-2016 OI Ghosh, Abhik/0000-0003-1161-6364 NR 29 TC 49 Z9 50 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD DEC 21 PY 1994 VL 33 IS 26 BP 6057 EP 6060 DI 10.1021/ic00104a014 PG 4 WC Chemistry, Inorganic & Nuclear SC Chemistry GA PZ161 UT WOS:A1994PZ16100014 ER PT J AU DAVIS, CA WALTERS, DL AF DAVIS, CA WALTERS, DL TI ATMOSPHERIC INNER-SCALE EFFECTS ON NORMALIZED IRRADIANCE VARIANCE SO APPLIED OPTICS LA English DT Article DE ATMOSPHERIC OPTICS; LASER PROPAGATION; PROPAGATION SIMULATION; IRRADIANCE FLUCTUATIONS ID NUMERICAL-SIMULATION; RANDOM-MEDIA; SPECTRUM; SCINTILLATION; PROPAGATION; WAVES AB We have investigated five types of atmospheric optical-turbulence inner scales for their effects on normalized laser irradiance variance in the Rytov and early saturation regimes: (1) zero inner scale, (2) Gaussian inner scale, (3) Hill's viscous-convective enhancement inner scale, (4) Frehlich's parameterization of the viscous-convective enhancement, and (5) turbulence spectrum truncation because of the discrete grid representation. Wave-optics computer simulations yielded normalized irradiance variances within 2% of the results from numerical integrations of the Rytov-Tatarskii predictions. In the Rytov regime a Gaussian inner scale reduces the normalized irradiance variance compared with the zero-inner-scale case, and the viscous-convective inner scale first raises, then lowers the irradiance variance as the inner-scale size increases. In the saturation regime all inner-scale models increase the intensity variance for a spherical wave. RP DAVIS, CA (reprint author), USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93943, USA. NR 10 TC 10 Z9 10 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 DEC 20 PY 1994 VL 33 IS 36 BP 8406 EP 8411 PG 6 WC Optics SC Optics GA QC055 UT WOS:A1994QC05500016 PM 20963076 ER PT J AU SINGER, IL FAYEULLE, S EHNI, PD VARDIMAN, RG AF SINGER, IL FAYEULLE, S EHNI, PD VARDIMAN, RG TI THERMODYNAMIC GUIDANCE FOR IMPLANTATION TREATMENTS TO IMPROVE COATING-SUBSTRATE ADHESION SO APPLIED PHYSICS LETTERS LA English DT Article ID ION-BOMBARDMENT; SILICON-CARBIDE; CERAMICS; CHEMISTRY; ALUMINUM; FILMS RP SINGER, IL (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 32 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD DEC 19 PY 1994 VL 65 IS 25 BP 3191 EP 3193 DI 10.1063/1.112477 PG 3 WC Physics, Applied SC Physics GA PX641 UT WOS:A1994PX64100009 ER PT J AU NOZETTE, S RUSTAN, P PLEASANCE, LP HORAN, DM REGEON, P SHOEMAKER, EM SPUDIS, PD ACTON, CH BAKER, DN BLAMONT, JE BURATTI, BJ CORSON, MP DAVIES, ME DUXBURY, TC ELIASON, EM JAKOSKY, BM KORDAS, JF LEWIS, IT LICHTENBERG, CL LUCEY, PG MALARET, E MASSIE, MA RESNICK, JH ROLLINS, CJ PARK, HS MCEWEN, AS PRIEST, RE PIETERS, CM REISSE, RA ROBINSON, MS SIMPSON, RA SMITH, DE SORENSON, TC BREUGGE, RWV ZUBER, MT AF NOZETTE, S RUSTAN, P PLEASANCE, LP HORAN, DM REGEON, P SHOEMAKER, EM SPUDIS, PD ACTON, CH BAKER, DN BLAMONT, JE BURATTI, BJ CORSON, MP DAVIES, ME DUXBURY, TC ELIASON, EM JAKOSKY, BM KORDAS, JF LEWIS, IT LICHTENBERG, CL LUCEY, PG MALARET, E MASSIE, MA RESNICK, JH ROLLINS, CJ PARK, HS MCEWEN, AS PRIEST, RE PIETERS, CM REISSE, RA ROBINSON, MS SIMPSON, RA SMITH, DE SORENSON, TC BREUGGE, RWV ZUBER, MT TI THE CLEMENTINE MISSION TO THE MOON - SCIENTIFIC OVERVIEW SO SCIENCE LA English DT Article ID THERMAL EMISSION; COHERENT BACKSCATTER; SURFACE AB In the course of 71 days in lunar orbit, from 19 February to 3 May 1994, the Clementine spacecraft acquired just under two million digital images of the moon at visible and infrared wavelengths. These data are enabling the global mapping of the rock types of the lunar crust and the first detailed investigation of the geology of the lunar polar regions and the lunar far side. In addition, laser-ranging measurements provided the first view of the global topographic figure of the moon. The topography of many ancient impact basins has been measured, and a global map of the thickness of the lunar crust has been derived from the topography and gravity. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. USN,RES LAB,WASHINGTON,DC 20375. US GEOL SURVEY,FLAGSTAFF,AZ 86001. LUNAR & PLANETARY INST,HOUSTON,TX 77058. CALTECH,JET PROP LAB,PASADENA,CA 91109. UNIV COLORADO,LASP,BOULDER,CO 80309. CTR NATL ETUD SPATIALES,PARIS,FRANCE. RES SUPPORT INSTRUMENTS,ALEXANDRIA,VA 22314. RAND CORP,SANTA MONICA,CA 90407. UNIV HAWAII MANOA,HONOLULU,HI 96822. APPL COHERENT TECHNOL,HERNDON,VA 22070. PACIFIC ADV TECHNOL,SOLVANG,CA 94550. BROWN UNIV,PROVIDENCE,RI 02912. SCI INQUIRIES,CATONSVILLE,MD 21228. STANFORD UNIV,STANFORD,CA 94305. NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. ALLIED SIGNAL AEROSP CO,ALEXANDRIA,VA 22314. SCI APPLICAT INT CORP,WASHINGTON,DC 20024. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. RP NOZETTE, S (reprint author), BALLIST MISSILE DEF ORG,WASHINGTON,DC, USA. NR 23 TC 253 Z9 263 U1 4 U2 14 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD DEC 16 PY 1994 VL 266 IS 5192 BP 1835 EP 1839 DI 10.1126/science.266.5192.1835 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PX383 UT WOS:A1994PX38300028 PM 17737076 ER PT J AU EDELSTEIN, AS EVERETT, RK RICHARDSON, GY QADRI, SB ALTMAN, EI FOLEY, JC PEREPEZKO, JH AF EDELSTEIN, AS EVERETT, RK RICHARDSON, GY QADRI, SB ALTMAN, EI FOLEY, JC PEREPEZKO, JH TI INTERMETALLIC PHASE-FORMATION DURING ANNEALING OF AL/NI MULTILAYERS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID DIFFUSION COUPLES; FORMATION SEQUENCE; EFFECTIVE HEAT; NUCLEATION; NI; PLANAR; GROWTH; AMORPHIZATION; KINETICS; SYSTEMS C1 UNIV WISCONSIN,DEPT MAT SCI & ENGN,MADISON,WI 53706. RP EDELSTEIN, AS (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. OI Everett, Richard/0000-0002-6725-9442 NR 46 TC 82 Z9 83 U1 2 U2 17 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 DEC 15 PY 1994 VL 76 IS 12 BP 7850 EP 7859 DI 10.1063/1.357893 PG 10 WC Physics, Applied SC Physics GA PX184 UT WOS:A1994PX18400027 ER PT J AU WAYLAND, R BROMLEY, D PICKETT, D PASSAMANTE, A AF WAYLAND, R BROMLEY, D PICKETT, D PASSAMANTE, A TI MEASURING SPATIAL SPREADING IN RECURRENT TIME-SERIES SO PHYSICA D LA English DT Article ID DETERMINISM; CHAOS AB The notion of spatial. spreading in a recurrent time series is developed. We first define the spatial spreading for a random displacement field. A prescription is then given for constructing a family of displacement fields from a scalar time series. Theoretical results for Gaussian time series are presented. Several examples, using both simulated and real data, are discussed. RP WAYLAND, R (reprint author), USN,CTR AIR WARFARE,DIV AIRCRAFT,WARMINSTER,PA 18974, USA. NR 16 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 J9 PHYSICA D JI Physica D PD DEC 15 PY 1994 VL 79 IS 2-4 BP 320 EP 334 PG 15 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA PY379 UT WOS:A1994PY37900012 ER PT J AU LINCHUNG, PJ AF LINCHUNG, PJ TI LOCAL VIBRATIONAL-MODES OF IMPURITIES IN DIAMOND SO PHYSICAL REVIEW B LA English DT Article ID INFRARED-ABSORPTION; SYNTHETIC DIAMOND; LATTICE RP LINCHUNG, PJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 21 TC 17 Z9 17 U1 2 U2 5 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 DEC 15 PY 1994 VL 50 IS 23 BP 16905 EP 16913 DI 10.1103/PhysRevB.50.16905 PG 9 WC Physics, Condensed Matter SC Physics GA PZ825 UT WOS:A1994PZ82500012 ER PT J AU PROKES, SM CARLOS, WE GLEMBOCKI, OJ AF PROKES, SM CARLOS, WE GLEMBOCKI, OJ TI DEFECT-BASED MODEL FOR ROOM-TEMPERATURE VISIBLE PHOTOLUMINESCENCE IN POROUS SILICON SO PHYSICAL REVIEW B LA English DT Article ID OXYGEN HOLE-CENTERS; LUMINESCENCE; SPECTRA; FILMS; BAND RP PROKES, SM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 21 TC 98 Z9 99 U1 1 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 DEC 15 PY 1994 VL 50 IS 23 BP 17093 EP 17096 DI 10.1103/PhysRevB.50.17093 PG 4 WC Physics, Condensed Matter SC Physics GA PZ825 UT WOS:A1994PZ82500033 ER PT J AU THOMS, BD BUTLER, JE AF THOMS, BD BUTLER, JE TI HREELS SCATTERING MECHANISM FROM DIAMOND SURFACES SO PHYSICAL REVIEW B LA English DT Article ID ENERGY LOSS SPECTROSCOPY; ELECTRON-SCATTERING; GROWTH-MECHANISM; HYDROGEN; FACETS RP THOMS, BD (reprint author), USN,RES LAB,CODE 6174,WASHINGTON,DC 20375, USA. RI Butler, James/B-7965-2008 OI Butler, James/0000-0002-4794-7176 NR 28 TC 57 Z9 57 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 DEC 15 PY 1994 VL 50 IS 23 BP 17450 EP 17455 DI 10.1103/PhysRevB.50.17450 PG 6 WC Physics, Condensed Matter SC Physics GA PZ825 UT WOS:A1994PZ82500075 ER PT J AU JOHNSON, JK DAVIDSON, BN PEDERSON, MR BROUGHTON, JQ AF JOHNSON, JK DAVIDSON, BN PEDERSON, MR BROUGHTON, JQ TI ENERGETICS AND STRUCTURE OF TOROIDAL FORMS OF CARBON SO PHYSICAL REVIEW B LA English DT Article ID NANOSCALE GRAPHITIC TUBULES; ELECTRONIC-STRUCTURE; NEGATIVE-CURVATURE; FULLERENE TUBULES; DENSITY-MATRIX; C-60; NANOTUBES; SINGLE; GROWTH; MODEL RP JOHNSON, JK (reprint author), USN, RES LAB, COMPLEX SYST THEORY BRANCH, WASHINGTON, DC 20375 USA. NR 64 TC 43 Z9 43 U1 0 U2 1 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 DEC 15 PY 1994 VL 50 IS 23 BP 17575 EP 17582 DI 10.1103/PhysRevB.50.17575 PG 8 WC Physics, Condensed Matter SC Physics GA PZ825 UT WOS:A1994PZ82500092 ER PT J AU POWELEIT, CD SMITH, LM JONKER, BT AF POWELEIT, CD SMITH, LM JONKER, BT TI OBSERVATION OF LONG-LIVED EXCITON MAGNETIC POLARONS IN ZN1-XMNXSE/ZNSE MULTIPLE-QUANTUM WELLS SO PHYSICAL REVIEW B LA English DT Note ID INDUCED TYPE-I->TYPE-II TRANSITION; SPIN SUPERLATTICE FORMATION; FLIP RAMAN-SCATTERING; CD1-XMNXTE; SEMICONDUCTOR; FLUCTUATIONS; (CD,MN)SE; BEHAVIOR; DYNAMICS C1 USN,RES LAB,WASHINGTON,DC 20375. RP POWELEIT, CD (reprint author), UNIV CINCINNATI,DEPT PHYS,CINCINNATI,OH 45221, USA. RI Smith, Leigh/A-1071-2009 OI Smith, Leigh/0000-0002-3950-1713 NR 28 TC 15 Z9 15 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 DEC 15 PY 1994 VL 50 IS 24 BP 18662 EP 18665 DI 10.1103/PhysRevB.50.18662 PG 4 WC Physics, Condensed Matter SC Physics GA QB022 UT WOS:A1994QB02200098 ER PT J AU REEVE, SW WEIMER, WA AF REEVE, SW WEIMER, WA TI OPTIMIZING THE GAS-PHASE CHEMISTRY IN A DC ARCJET DIAMOND CHEMICAL-VAPOR-DEPOSITION REACTOR SO THIN SOLID FILMS LA English DT Article DE CHEMICAL VAPOR DEPOSITION; DIAMOND; GROWTH MECHANISM; RAMAN SCATTERING ID PLASMA-JET; FILM PREPARATION; SCALING LAWS; GROWTH; SURFACE AB The application of a thermally driven gas phase chemical mechanism to model the plasma chemistry in a d.c. arcjet diamond chemical vapor deposition reactor appears justified in light of the low measured electron temperatures and densities reported here. Based an the model predictions, several downstream CH4 injection schemes have been developed and are shown to produce diamond films which exhibit improved quality without a reduction in growth rate. Optical emission actinometry data are also presented which suggest that the H atom flux to the substrate in this reactor, under typical diamond growth conditions, is mass diffusion limited. This condition would impose a limitation on the attainable growth rate for the reactor. RP REEVE, SW (reprint author), USN,CTR AIR WARFARE,DIV CHEM,CHINA LAKE,CA 93555, USA. NR 27 TC 5 Z9 5 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 DEC 15 PY 1994 VL 253 IS 1-2 BP 103 EP 108 DI 10.1016/0040-6090(94)90302-6 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA PX356 UT WOS:A1994PX35600019 ER PT J AU STREITZ, FH MINTMIRE, JW AF STREITZ, FH MINTMIRE, JW TI ELECTROSTATIC-BASED MODEL FOR ALUMINA SURFACES SO THIN SOLID FILMS LA English DT Article DE ALUMINUM OXIDE; COMPUTER SIMULATION; SURFACE ENERGY; SURFACE STRUCTURE ID EMBEDDED-ATOM-METHOD; MOLECULAR-DYNAMICS SIMULATIONS; ELECTRONEGATIVITY EQUALIZATION; FCC METALS; SILICON; ORDER AB As most technologically important metals will form oxides readily, any complete study of adhesion at real metal surfaces must include the metal-oxide interface. The role of this ubiquitous oxide layer cannot be overlooked, as the adhesive properties of the oxide or oxide-metal system can be expected to differ profoundly from the adhesive properties of a bare metal surface. We report on the development of a novel computational method for molecular dynamics simulations which explicitly includes variable charge transfer between anions and cations. This method is found to be capable of describing the elastic properties, surface energies, and surface relaxation of crystalline metal-oxides accurately. We discuss in detail results using this method of alpha-alumina and several of its low index faces. RP STREITZ, FH (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. OI Mintmire, John/0000-0002-6551-0349 NR 42 TC 12 Z9 12 U1 0 U2 4 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 DEC 15 PY 1994 VL 253 IS 1-2 BP 179 EP 184 DI 10.1016/0040-6090(94)90316-6 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA PX356 UT WOS:A1994PX35600033 ER PT J AU TUPPER, KJ BRENNER, DW AF TUPPER, KJ BRENNER, DW TI MOLECULAR-DYNAMICS SIMULATIONS OF FRICTION IN SELF-ASSEMBLED MONOLAYERS SO THIN SOLID FILMS LA English DT Article DE COMPUTER SIMULATION; MONOLAYERS ID FORCE MICROSCOPY; SURFACES AB Molecular dynamics simulations were performed to study friction in self-assembled monolayers of alkanethiols on gold. The simulations yield a Frictional force that is proportional to the applied load, consistent with Amontons' second law for macroscopic systems. It is further demonstrated that the chain length of the alkanethiols and the load under which the surfaces interact has an effect on the structure of the monolayer film during compression. The simulations suggest, however, that these changes in structure have little effect on the friction properties of the monolayer film. Also, the mode of energy dissipation in both this system and a system in which two monolayer films interact is examined. C1 USN, RES LAB, SURFACE CHEM BRANCH, WASHINGTON, DC 20375 USA. RI Brenner, Donald/D-1741-2009 NR 17 TC 68 Z9 76 U1 1 U2 6 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0040-6090 J9 THIN SOLID FILMS JI Thin Solid Films PD DEC 15 PY 1994 VL 253 IS 1-2 BP 185 EP 189 DI 10.1016/0040-6090(94)90317-4 PG 5 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA PX356 UT WOS:A1994PX35600034 ER PT J AU SZPAK, S MOSIERBOSS, PA SMITH, JJ AF SZPAK, S MOSIERBOSS, PA SMITH, JJ TI DEUTERIUM UPTAKE DURING PD-D CODEPOSITION SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY LA English DT Article DE GALVANOSTATIC PERTURBATION; DEUTERIUM UPTAKE; PD-D CODEPOSITION ID HYDROGEN AB The mode of deuterium uptake during Pd-D co-deposition has been explored using galvanostatic perturbation techniques. The resultant potential relaxation curves exhibit four distinct potential-time intervals where the relaxation process is controlled by the interaction between the transport of deuterium from the lattice to the surface to form adsorbed deuterium and the reduction of palladium from solution. These interactions are discussed in terms of the palladium + electrolyte interphase. C1 US DOE,WASHINGTON,DC 20585. RP SZPAK, S (reprint author), USN,CTR NAVAL COMMAND CONTROL & OCEAN SURVEILLENCE,DIV RDT&E,SAN DIEGO,CA 92152, USA. NR 13 TC 9 Z9 9 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0022-0728 J9 J ELECTROANAL CHEM JI J. Electroanal. Chem. PD DEC 12 PY 1994 VL 379 IS 1-2 BP 121 EP 127 DI 10.1016/0022-0728(94)87130-2 PG 7 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA PX037 UT WOS:A1994PX03700012 ER PT J AU RAJAGOPAL, AK BUOT, FA AF RAJAGOPAL, AK BUOT, FA TI A NONEQUILIBRIUM TIME-DEPENDENT FUNCTIONAL THEORY-BASED ON LIOUVILLEAN QUANTUM-FIELD DYNAMICS IN CONDENSED MATTER SYSTEMS SO PHYSICS LETTERS A LA English DT Article ID EQUILIBRIUM AB A nonequilibrium time-dependent functional theory, for studying a condensed matter system which is initially in thermodynamic equilibrium subjected to external time-dependent fields, is constructed based on Liouvillean quantum field dynamics, by the introduction of a new superoperator in the Liouville space corresponding to the time-derivative operator in the Hilbert space. This formalism provides a rigorous justification of the self-consistent and time-dependent numerical simulation of resonant tunneling devices including their bistability. This shows the utility of the present theory in the study of open systems. The theory is further generalized to incorporate the ion motions and the electromagnetic fields. The above formalism thus provides a firm physical and mathematical basis for time-dependent simulation procedures such as those based on the Car-Parinello approach by replacing the fictitious Lagrangian used there by a precise action principle. RP RAJAGOPAL, AK (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 14 TC 9 Z9 9 U1 0 U2 0 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 DEC 12 PY 1994 VL 195 IS 5-6 BP 312 EP 318 DI 10.1016/0375-9601(94)90035-3 PG 7 WC Physics, Multidisciplinary SC Physics GA PW977 UT WOS:A1994PW97700007 ER PT J AU BHATTACHARYA, D THE, LS KURFESS, JD CLAYTON, DD GEHRELS, N LEISING, MD GRABELSKY, DA JOHNSON, WN JUNG, GV KINZER, RL PURCELL, WR STRICKMAN, MS ULMER, MP AF BHATTACHARYA, D THE, LS KURFESS, JD CLAYTON, DD GEHRELS, N LEISING, MD GRABELSKY, DA JOHNSON, WN JUNG, GV KINZER, RL PURCELL, WR STRICKMAN, MS ULMER, MP TI GAMMA-RAY OBSERVATIONS OF NGC-253 AND M82 WITH OSSE SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, STARBURST; GALAXIES, INDIVIDUAL (NGC 253, M82); GAMMA RAYS, OBSERVATIONS; RADIATION MECHANISMS, NONTHERMAL ID SCINTILLATION SPECTROMETER EXPERIMENT; STARBURST GALAXY M82; X-RAY; I SUPERNOVAE; LIGHT CURVES; EMISSION; SN-1987A; NGC-253; RADIO; SAMPLE AB Gamma-ray observations of the nearby starburst galaxies NGC 253 and M82 over the energy range (0.05-10) MeV have been obtained with the OSSE spectrometer on the Compton Gamma-Ray Observatory. The priority of these galaxies as OSSE targets had been established on the grounds that the average supernova rate may be high in starbursts as indicated by infrared and radio observations, and at distances of similar to 3 MPc a significant chance of supernova gamma-ray line detection exists. NGC 253 was detected in continuum emission up to 165 keV with a total significance of 4.4 sigma and an estimated luminosity of 3 x 10(40) ergs s(-1). The spectrum is best fit by a power law of photon index similar to 2.5. We consider the possible contribution of different emission mechanisms, including inverse Compton scattering, bremsstralung, discrete sources, and Type Ia/Ib supernova continuum to the measured flux. No significant continuum flux was observed from M82. A search for the gamma-ray line from the decay of the most abundant radioactive element produced in supernovae (Ni-56 --> (CO)-C-56 --> Fe-56) yielded no significant detection: the 3 sigma upper limits to the line fluxes at 0.158, 0.812, 0.847, and 1.238 MeV for both galaxies are obtained. C1 CLEMSON UNIV,DEPT PHYS & ASTRON,CLEMSON,SC 29634. USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208. UNIV SPACE RES ASSOC,WASHINGTON,DC 20024. RP BHATTACHARYA, D (reprint author), UNIV CALIF RIVERSIDE,INST GEOPHYS & PLANETARY PHYS,RIVERSIDE,CA 92521, USA. RI Gehrels, Neil/D-2971-2012; Johnson, Neil/G-3309-2014 NR 43 TC 23 Z9 23 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 DEC 10 PY 1994 VL 437 IS 1 BP 173 EP 178 DI 10.1086/174985 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PW003 UT WOS:A1994PW00300016 ER PT J AU ALBERT, CE WELSH, BY DANLY, L AF ALBERT, CE WELSH, BY DANLY, L TI EVIDENCE FOR AN EXTENDED NEUTRAL GALACTIC HALO SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXY, HALO; ISM, ABUNDANCES ID INTERSTELLAR CA-II; LOW-REDSHIFT QSOS; ABSORPTION SYSTEMS; ABUNDANCE SURVEYS; NA-I; STARS; GAS; LINES; ULTRAVIOLET; ELEMENTS AB Singly ionized titanium is the dominant ionization stage in H I regions and provides an excellent tracer of the neutral interstellar medium. Here we present new interstellar Ti II absorption line observations toward six halo stars located at \z\ > 1 kpc. Although the gas distribution is probably patchy, significant neutral gas does exist beyond 1 kpc from the Galactic plane and the projected column density, N(Ti II) sin (b), continues to increase out to the most distant star observed, at z = 8.7: kpc. Along this line of sight, the Ti II absorption is the strongest yet detected and also has the highest gas-phase abundance of titanium seen in interstellar gas. Ti II absorption observed toward halo stars may arise from a new component of the halo interstellar medium which contains low column density neutral gas over a wide velocity range and which may extend beyond several H I scale heights from the plane. The scale height of this component has yet to be determined, but could be well beyond several kpc, coincident with or even farther than the highly ionized gas observed in C IV and Si IV. Observations toward a large sample of extragalactic sources are needed to determine the actual scale height of neutral halo gas. C1 UNIV CALIF BERKELEY,GRIZZLY PEAK & CENTENNIEL,SPACE SCI LAB,BERKELEY,CA 94720. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. RP ALBERT, CE (reprint author), USN ACAD,DEPT PHYS,ANNAPOLIS,MD 21402, USA. NR 34 TC 9 Z9 9 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 DEC 10 PY 1994 VL 437 IS 1 BP 204 EP 208 DI 10.1086/174989 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PW003 UT WOS:A1994PW00300020 ER PT J AU CAMILO, F FOSTER, RS WOLSZCZAN, A AF CAMILO, F FOSTER, RS WOLSZCZAN, A TI HIGH-PRECISION TIMING OF PSR J1713+0747 - SHAPIRO DELAY SO ASTROPHYSICAL JOURNAL LA English DT Article DE ASTROMETRY; PULSARS, INDIVIDUAL (PSR J1713+0747); RELATIVITY ID RELATIVISTIC GRAVITY; MILLISECOND PULSAR; BINARY; MASSES; SYSTEM AB We present results based on timing of the binary millisecond pulsar J1713+0747 for 22 months through 1994 February. We have measured its annual parallax, pi = (0.9 +/- 0.3) mas, as well as its proper motion, mu = (6.4 +/- 1.0) milliarcsec (mas) yr(-1). We detect a signature in the timing residuals that is most naturally interpreted as the general relativisitic ''Shapiro delay at the 2 sigma confidence level, we find the companion mass, m(2) > 0.27 M(.), while the pulsar mass, m(1) > 1.2 M.. Upper limits on both masses can only be obtained by imposing additional constraints on the system, such as requiring that general relativity be valid in the strong-field limit. With a post-fit weighted root mean square timing residual of approximately 0.4 mu s, and a characteristic age of roughly 9 x 10(9) yr, this pulsar is potentially the most stable celestial clock among all known pulsars. C1 PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544. USN,RES LAB,DIV REMOTE SENSING,WASHINGTON,DC 20375. PENN STATE UNIV,DEPT ASTRON & ASTROPHYS,UNIVERSITY PK,PA 16802. RP CAMILO, F (reprint author), PRINCETON UNIV,JOSEPH HENRY LABS,PRINCETON,NJ 08544, USA. NR 25 TC 52 Z9 52 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 DEC 10 PY 1994 VL 437 IS 1 BP L39 EP L42 DI 10.1086/187677 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PW004 UT WOS:A1994PW00400010 ER PT J AU WANG, YM AF WANG, YM TI 2 TYPES OF SLOW SOLAR-WIND SO ASTROPHYSICAL JOURNAL LA English DT Article DE HYDRODYNAMICS; SOLAR WIND; SUN, CORONA; SUN, MAGNETIC FIELDS ID CORONAL HOLES; FLUX; DYNAMICS; MASS AB Slow solar wind is associated with rapidly diverging magnetic field occurring (1) at the boundaries of the large polar holes and (2) above small coronal holes. Coronal energy balance models are developed for these two types of sources. We find that the ''reconvergence'' of flux tubes at the polar hole boundaries can explain the high mass flux density of the slow wind near the heliospheric current sheet. However, to account for the high-density wind originating from the small holes prevalent at sunspot maximum, substantially enhanced rates of coronal heating are required. RP USN, RES LAB, EO HULBURT CTR SPACE RES, CODE 7672W, WASHINGTON, DC 20375 USA. NR 17 TC 57 Z9 59 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 DEC 10 PY 1994 VL 437 IS 1 BP L67 EP L70 DI 10.1086/187684 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PW004 UT WOS:A1994PW00400017 ER PT J AU DICKEY, JO MARCUS, SL HIDE, R EUBANKS, TM BOGGS, DH AF DICKEY, JO MARCUS, SL HIDE, R EUBANKS, TM BOGGS, DH TI ANGULAR-MOMENTUM EXCHANGE AMONG THE SOLID EARTH, ATMOSPHERE, AND OCEANS - A CASE-STUDY OF THE 1982-1983 EL-NINO EVENT SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID QUASI-BIENNIAL OSCILLATION; OF-DAY VARIATION; SOUTHERN OSCILLATION; TIME SCALES; ROTATION; LENGTH; FLUCTUATIONS; CIRCULATION; PACIFIC; BALANCE AB The 1982-1983 El Nino/Southern Oscillation (ENSO) event was accompanied by the largest interannual variation in the Earth's rotation rate on record. In this study we demonstrate that atmospheric forcing was the dominant cause for this rotational anomaly, with atmospheric angular momentum (AAM) integrated from 1000 to 1 mbar (troposphere plus stratosphere) accounting for up to 92% of the interannual variance in the length of day (LOD). Winds between 100 and 1 mbar contributed nearly 20% of the variance explained, indicating that the stratosphere can play a significant role in the Earth's angular momentum budget on interannual time scales. Examination of LOD, AAM, and Southern Oscillation Index (SOI) data for a 15-year span surrounding the 1982-1983 event suggests that the strong rotational response resulted from constructive interference between the low-frequency (similar to 4-6 year) and quasi-biennial (similar to 2-3 year) components of the ENSO phenomenon, as well as the stratospheric Quasi-Biennial Oscillation (QBO). Sources of the remaining LOD discrepancy (similar to 55 and 64 mu s rms residual for the European Centre for Medium-Range Forecasting (EC) and U.S. National Meteorological Center (NMC) analyses) are explored; noise and systematic errors in the AAM data are estimated to contribute 18 and 33 mu s, respectively, leaving a residual (rms) of 40 (52) mu s unaccounted for by the EC (NMC) analysis. Oceanic angular momentum contributions (both moment of inertia changes associated with baroclinic waves and motion terms) are shown to be candidates in closing the interannual axial angular momentum budget. C1 USN OBSERV, WASHINGTON, DC 20392 USA. UNIV OXFORD, DEPT PHYS, CLARENDON LAB, OCEANOG GRP, OXFORD OX1 3PU, ENGLAND. RP DICKEY, JO (reprint author), CALTECH, JET PROP LAB, SPACE GEODET SCI & APPLICAT GRP, 4800 OAK GROVE DR, PASADENA, CA 91109 USA. NR 60 TC 24 Z9 28 U1 0 U2 5 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 DEC 10 PY 1994 VL 99 IS B12 BP 23921 EP 23937 DI 10.1029/94JB01249 PG 17 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA PX338 UT WOS:A1994PX33800011 ER PT J AU DERECSKEIKOVACS, A DUNLAP, BI LIPSCOMB, WN LOWREY, A MARYNICK, DS MASSA, L AF DERECSKEIKOVACS, A DUNLAP, BI LIPSCOMB, WN LOWREY, A MARYNICK, DS MASSA, L TI QUANTUM-CHEMICAL STUDIES OF BORON FULLERENE ANALOGS SO INORGANIC CHEMISTRY LA English DT Article ID DIATOMIC DIFFERENTIAL-OVERLAP; PARTIAL RETENTION; APPROXIMATIONS; MOLECULES; MODELS; AM1 AB In the polyhedral BNHN series, charge states are -2 for N = 12 (the known B12H12-2 ion), Zero for N = 16 (T-d symmetry), -2 for N = 32 (I-h symmetry, the dual polyhedron of the C-60 fullerene), -2 for N = 37 (D-5h symmetry) and -2 for N = 42 (I-h symmetry), as calculated by ab initio (3-21G level), PRDDO (partial retention of diatomic differential overlap), AM1 (semiempirical), and LDF (local density functional) methods. These methods are in agreement, although the AM1 results did nor converge for N = 37. The most stable species per BH unit is B12H122-, and the next most stable is predicted to be B42H422-. C1 USN,RES LAB,WASHINGTON,DC 20375. HARVARD UNIV,DEPT CHEM,CAMBRIDGE,MA 02138. CUNY,DEPT CHEM,NEW YORK,NY 10036. CUNY,DEPT PHYS,NEW YORK,NY 10036. RP DERECSKEIKOVACS, A (reprint author), UNIV TEXAS,DEPT CHEM & BIOCHEM,BOX 19065,ARLINGTON,TX 76019, USA. NR 15 TC 18 Z9 18 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD DEC 7 PY 1994 VL 33 IS 25 BP 5617 EP 5619 DI 10.1021/ic00103a004 PG 3 WC Chemistry, Inorganic & Nuclear SC Chemistry GA PW092 UT WOS:A1994PW09200004 ER PT J AU CRAWFORD, GP GEER, RE NACIRI, J SHASHIDHAR, R RATNA, BR AF CRAWFORD, GP GEER, RE NACIRI, J SHASHIDHAR, R RATNA, BR TI INFLUENCE OF THE ELECTRIC-FIELD ON THE QUASI-BOOKSHELF STRIPE DEFORMATION IN AN ELECTROCLINIC LIQUID-CRYSTAL SO APPLIED PHYSICS LETTERS LA English DT Article ID AC PHASE-CHANGE; LAYER STRUCTURE; CELLS RP CRAWFORD, GP (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,CODE 6900,4555 OVERLOOK AVE SW,WASHINGTON,DC 20375, USA. NR 21 TC 36 Z9 36 U1 0 U2 7 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 DEC 5 PY 1994 VL 65 IS 23 BP 2937 EP 2939 DI 10.1063/1.112540 PG 3 WC Physics, Applied SC Physics GA PV093 UT WOS:A1994PV09300013 ER PT J AU THOMS, BD OWENS, MS BUTLER, JE SPIRO, C AF THOMS, BD OWENS, MS BUTLER, JE SPIRO, C TI PRODUCTION AND CHARACTERIZATION OF SMOOTH, HYDROGEN-TERMINATED DIAMOND C(100) SO APPLIED PHYSICS LETTERS LA English DT Article ID THERMAL-DESORPTION; SURFACE C1 GE CO,CORP RES & DEV,SCHENECTADY,NY 12301. RP THOMS, BD (reprint author), USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375, USA. RI Butler, James/B-7965-2008 OI Butler, James/0000-0002-4794-7176 NR 19 TC 106 Z9 106 U1 3 U2 17 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 DEC 5 PY 1994 VL 65 IS 23 BP 2957 EP 2959 DI 10.1063/1.112503 PG 3 WC Physics, Applied SC Physics GA PV093 UT WOS:A1994PV09300020 ER PT J AU MRSTIK, BJ MCMARR, PJ LAWRENCE, RK AF MRSTIK, BJ MCMARR, PJ LAWRENCE, RK TI RELATIONSHIP BETWEEN RADIATION RESPONSE AND DENSITY OF BURIED OXIDE IN SEPARATION-BY-IMPLANTATION-OF-OXYGEN MATERIAL SO APPLIED PHYSICS LETTERS LA English DT Article ID SPECTROSCOPIC ELLIPSOMETRY RP MRSTIK, BJ (reprint author), USN,RES LAB,CODE 6816,WASHINGTON,DC 20375, USA. NR 12 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 DEC 5 PY 1994 VL 65 IS 23 BP 2993 EP 2995 DI 10.1063/1.112487 PG 3 WC Physics, Applied SC Physics GA PV093 UT WOS:A1994PV09300032 ER PT J AU BLACKLEDGE, RD AF BLACKLEDGE, RD TI DNA PROFILING DISCUSSED SO CHEMICAL & ENGINEERING NEWS LA English DT Letter C1 USN,CRIMINAL INVESTIGAT SERV,REG FORENS LAB,SAN DIEGO,CA 92132. NR 2 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0009-2347 J9 CHEM ENG NEWS JI Chem. Eng. News PD DEC 5 PY 1994 VL 72 IS 49 BP 4 EP 4 PG 1 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA PV393 UT WOS:A1994PV39300001 ER PT J AU CHANG, H AF CHANG, H TI IN-SITU TRANSCRIPTION WITH TTH DNA-POLYMERASE AND FLUORESCENT NUCLEOTIDES SO JOURNAL OF IMMUNOLOGICAL METHODS LA English DT Article DE IN SITU TRANSCRIPTION; THERMOSTABLE DNA POLYMERASE; IL-2 ID INSITU HYBRIDIZATION; MESSENGER-RNA; LYMPHOCYTES-T; REVERSE TRANSCRIPTION; COMPLEMENTARY-DNA; AMPLIFICATION; SEQUENCE; CELLS; GENE; ACTIVATION AB We and others have described methods to label specific nucleic acid sequences in fixed cells by reverse in situ transcription (IST). They are simple alternatives to the tedious steps of in situ hybridization with labeled probes. We have favored use of thermostable DNA polymerases after heat denaturation of template secondary structure, accompanied by synthesis of cDNA from an annealed primer, but the approach has been limited by the low reverse transcriptase (RT) activity of Tag polymerase and delayed detection methods. We have improved the technique by the use of recombinant Thermus thermophilus (rTth) DNA polymerase and fluorescein-12-dUTP (FIST). Jurkat T lymphocytes were stimulated with ionomycin + phorbol myristate acetate to produce interleukin-2 (IL-2) mRNA in vitro overnight. They were cytospun onto slides and fixed in 70% ethanol + 30% DEPC-treated water, acetone, and air-dried. The slides were placed on a temperature-controlled heating block, and the cell spot was covered with a plastic coverslip. The temperature was raised to 95 degrees C, and 5-10 mu l of modified Perkin-Elmer/Cetus rTth RT reaction mix was injected under the edge of the coverslip. Each 10 mu l of mix in DEPC-water contained 10 mM Tris-HCl, pH 8.3, 90 mM KCl, 1 mM MnCl2, 1 mM dithiothreitol, 10 U placental ribonuclease inhibitor, 0.125 mM dA,C,GTPs, 0.1 mM fluorescein-12-dUTP, 2 U rTth DNA polymerase, and 4 pM 22-mer oligonucleotide primer, which spanned the second intron of IL-2. After 3 min at 95 degrees C, 1 min at 50 degrees C and 10 min at 72 degrees C, the slides were washed in 0.5 x phosphate-buffered saline, pH 7.0, at 42 degrees C, in 70% ethanol, 100% ethanol, and air-dried. The cells were mounted in antifade solution (2% n-propyl gallate in 70% glycerol), and could be viewed immediately by fluorescence microscopy. Image analysis showed that stimulated Jurkat cells were brighter than uninduced controls or those treated with RNase or without polymerase or primer. FIST appears to be useful for the detection of specific mRNAs in single cells. RP CHANG, H (reprint author), USN,MED RES INST,CODE 63,BETHESDA,MD 20889, USA. NR 29 TC 2 Z9 2 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-1759 J9 J IMMUNOL METHODS JI J. Immunol. Methods PD DEC 2 PY 1994 VL 176 IS 2 BP 235 EP 243 DI 10.1016/0022-1759(94)90317-4 PG 9 WC Biochemical Research Methods; Immunology SC Biochemistry & Molecular Biology; Immunology GA PV785 UT WOS:A1994PV78500010 PM 7983381 ER PT J AU LU, ZW ZUNGER, A FOX, AG AF LU, ZW ZUNGER, A FOX, AG TI COMPARISON OF EXPERIMENTAL AND THEORETICAL ELECTRONIC CHARGE-DISTRIBUTIONS IN GAMMA-TIA1 SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID CRYSTALLINE SILICON; DENSITY; ALLOYS; 1ST-PRINCIPLES; BRITTLENESS; METAL; GAAS AB Using critical voltage electron diffraction, Fox has recently determined the lowest seven X-ray structure factors of gamma-TiAl (L1(0) structure). We present here a comparison of these accurately measured (0.15%) structure factors with first-principles local density calculations, finding an agreement within 0.7% and an r.m.s. error of 0.013 e/atom. While such measurements are limited to the first few structure factors rho(G) (where G is the crystal momentum), theory is able to obtain rho(G) for arbitrarily high G. If we construct charge density deformation maps by Fourier summations up to the lowest measured G, the calculated and experimental density deformation maps agree very closely. However, if we include in the theoretical density deformation map high G values (outside the range accessible to experiment), qualitatively different bonding patterns appear, in particular between Ti atoms. Systematic study of the total, valence, and deformation charge densities as well as comparison with result for NiAl in the hypothetical L1(0) structure elucidate the bonding patterns in these transition metal aluminides. C1 NATL RENEWABLE ENERGLY LAB, GOLDEN, CO 80401 USA. USN, POSTGRAD SCH, DEPT MECH ENGN, MONTEREY, CA 93943 USA. RI Zunger, Alex/A-6733-2013 NR 42 TC 19 Z9 19 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD DEC PY 1994 VL 42 IS 12 BP 3929 EP 3943 DI 10.1016/0956-7151(94)90171-6 PG 15 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA PQ619 UT WOS:A1994PQ61900002 ER PT J AU SPANOS, G MASUMURA, RA VANDERMEER, RA ENOMOTO, M AF SPANOS, G MASUMURA, RA VANDERMEER, RA ENOMOTO, M TI THE EVOLUTION AND GROWTH-KINETICS OF PRECIPITATE PLATES GROWING BY THE LEDGE MECHANISM SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID TRANSMISSION ELECTRON-MICROSCOPY; AL-AG SYSTEM; C-MO ALLOYS; INTERPHASE BOUNDARIES; ATOMIC MECHANISMS; TRANSFORMATION INTERFACES; PHASE-TRANSFORMATIONS; DIFFRACTION CONTRAST; PROEUTECTOID FERRITE; AUSTENITE AB The evolution and growth kinetics of precipitate plates growing by the ledge mechanism during solid-solid phase transformations have been studied by employing a previously developed finite-difference-based diffusional growth model. In particular, the effects of ledge density, ledge nucleation kinetics and the presence of multiple precipitates (in parallel groups) on solute buildup in the matrix, morphological evolution, and lengthening kinetics of precipitate plates are analyzed. For solute-poor precipitates, higher ledge densities along the broad faces of precipitate plates produce an increased solute buildup at the board faces which causes ledge coalescence and can result in decreased plate lengthening rates due to diffusional interaction with the solute field at the plate tip. Two types of ledge nucleation kinetics were considered. One, in which the time interval between ledge nucleation events increases parabolically with time produces precipitate morphologies and plate lengthening kinetics similar to those observed experimentally for proeutectoid ferrite plates. The other, steady state ledge nucleation kinetics, yields growth behavior which, at high undercoolings, does not adequately match experimental observations. For groups of closely spaced precipitates arranged in a periodic array, small precipitate spacings (less than about 100 ledge heights) can lead to decreased plate lengthening kinetics at high supersaturations (OMEGA0 > 0.55). C1 IBARAKI UNIV, DEPT MAT SCI, HITACHI 316, JAPAN. RP SPANOS, G (reprint author), USN, RES LAB, PHYS MET BRANCH, 4555 OVERLOOK AVE SW, WASHINGTON, DC 20375 USA. RI LAI, JING/F-6526-2010 NR 52 TC 32 Z9 32 U1 0 U2 11 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD DEC PY 1994 VL 42 IS 12 BP 4165 EP 4176 DI 10.1016/0956-7151(94)90193-7 PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA PQ619 UT WOS:A1994PQ61900024 ER PT J AU SCHNUR, JM SHASHIDHAR, R AF SCHNUR, JM SHASHIDHAR, R TI SELF-ASSEMBLING PHOSPHOLIPID TUBULES SO ADVANCED MATERIALS LA English DT Note ID VACUUM FIELD-EMISSION; LIPID TUBULES; MICROSTRUCTURES; COMPOSITES; BEHAVIOR AB Lipid-based tubules serve as models for the development of advanced materials based upon molecular self-assembly. The processes by which tubules are formed and how they are coated with metals (nickel in the Figure) or used as templates in order to increase the strength of the final material are described. Their electrical and magnetic properties are discussed. RP SCHNUR, JM (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,CODE 6900,WASHINGTON,DC 20375, USA. NR 21 TC 27 Z9 28 U1 3 U2 9 PU VCH PUBLISHERS INC PI DEERFIELD BEACH PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788 SN 0935-9648 J9 ADV MATER JI Adv. Mater. PD DEC PY 1994 VL 6 IS 12 BP 971 EP 974 DI 10.1002/adma.19940061216 PG 4 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA PW783 UT WOS:A1994PW78300015 ER PT J AU GORDIS, JH FLANNELLY, WG AF GORDIS, JH FLANNELLY, WG TI ANALYSIS OF STRESS DUE TO FASTENER TOLERANCE IN ASSEMBLED COMPONENTS SO AIAA JOURNAL LA English DT Article AB The location of fasteners in a manufactured component are commonly specified with an allowed deviation from nominal location, known as tolerance. The assembly of such components can generate stress due to the accumulation of these tolerances. A highly efficient and exact method for the linear static and complex dynamic analysis of assembly stress is presented. An exact reduced representation of the assembled components is generated using frequency domain structural synthesis. An alternative coordinate system is employed in the synthesis that allows the direct application of fastener tolerances to the component assembly model and the rapid calculation of the resulting displacements, strains, and stresses. The method provides an efficient means of rapidly assessing the effects of proposed (maximum allowable) tolerance limits for each component, thereby aiding in the design process and minimizing manufacturing costs. C1 KAMAN AEROSP CORP,BLOOMFILED,CT 06002. KAMAN AEROSP CORP,BLOOMFIELD,CT 06002. RP GORDIS, JH (reprint author), USN,POSTGRAD SCH,MONTEREY,CA 93943, USA. NR 4 TC 5 Z9 5 U1 0 U2 1 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 DEC PY 1994 VL 32 IS 12 BP 2440 EP 2446 DI 10.2514/3.12311 PG 7 WC Engineering, Aerospace SC Engineering GA QB301 UT WOS:A1994QB30100015 ER PT J AU SCOFIELD, VL RAO, B BRODER, S KENNEDY, C WALLACE, M GRAHAM, B POIESZ, BJ AF SCOFIELD, VL RAO, B BRODER, S KENNEDY, C WALLACE, M GRAHAM, B POIESZ, BJ TI HIV INTERACTION WITH SPERM SO AIDS LA English DT Letter ID HUMAN-IMMUNODEFICIENCY-VIRUS; POLYMERASE CHAIN-REACTION; ACTIVATED T-CELLS; HLA-DR; SIGNAL TRANSDUCTION; INFECTION; TYPE-1; SEMEN; SPERMATOZOA; EXPRESSION C1 UNIV CALIF LOS ANGELES,SCH MED,DEPT MICROBIOL & IMMUNOL,LOS ANGELES,CA 90024. CALIF CRYOBANK INC,LOS ANGELES,CA. USN HOSP,DIV INFECT DIS,SAN DIEGO,CA. SUNY HLTH SCI CTR,DEPT MED & MICROBIOL,SYRACUSE,NY. FU NHLBI NIH HHS [HB67021]; NIAID NIH HHS [AI27658]; NICHD NIH HHS [HD23093] NR 30 TC 52 Z9 52 U1 0 U2 0 PU RAPID SCIENCE PUBLISHERS PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8NH SN 0269-9370 J9 AIDS JI Aids PD DEC PY 1994 VL 8 IS 12 BP 1733 EP 1736 PG 4 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA PU185 UT WOS:A1994PU18500018 PM 7888126 ER PT J AU SCHREIBER, LR AF SCHREIBER, LR TI HICCUPS MAY BE SECONDARY TO GASTROESOPHAGEAL REFLUX SO AMERICAN FAMILY PHYSICIAN LA English DT Note RP SCHREIBER, LR (reprint author), USN HOSP TWENTYNINE PALMS,TWENTYNINE PALMS,CA 92278, 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 DEC PY 1994 VL 50 IS 8 BP 1778 EP 1778 PG 1 WC Primary Health Care; Medicine, General & Internal SC General & Internal Medicine GA PV984 UT WOS:A1994PV98400023 ER PT J AU KUCHNIO, M SAUSVILLE, EA JAFFE, ES GREINER, T FOSS, FM MCCLANAHAN, J FUKUSHIMA, P STETLERSTEVENSON, MA AF KUCHNIO, M SAUSVILLE, EA JAFFE, ES GREINER, T FOSS, FM MCCLANAHAN, J FUKUSHIMA, P STETLERSTEVENSON, MA TI FLOW CYTOMETRIC DETECTION OF NEOPLASTIC T-CELLS IN PATIENTS WITH MYCOSIS-FUNGOIDES BASED ON LEVELS OF T-CELL RECEPTOR EXPRESSION SO AMERICAN JOURNAL OF CLINICAL PATHOLOGY LA English DT Article DE MALIGNANT LYMPHOMA; CUTANEOUS NEOPLASMS; LYMPHOCYTE SUBSETS; FLOW CYTOMETRY ID MINIMAL RESIDUAL DISEASE; ACUTE-LEUKEMIA; LYMPHOMA AB The authors report the flow cytometric detection of neoplastic T cells in the peripheral blood of four out of five (80%) patients with peripheral blood involvement with mycosis fungoides (Sezary syndrome) based on the levels of T-cell receptor expression as measured by CD3 and TCR-alpha beta staining. Antigen receptor expression was abnormal in terms of increased density of surface CD3 or TCR-alpha beta per cell. Other immunophenotypic abnormalities were present in three of these patients. However, in one patient abnormal T-cell receptor expression was the only immunophenotypic evidence of neoplasia, although morphologically abnormal lymphocytes were present and a T-cell clone was detected by polymerase chain reaction (PCR). In another patient, the authors were able to detect development of a new, more aggressive neoplastic T-cell population based on levels of T-cell receptor expression. Levels of T-cell receptor expression may be of diagnostic utility in the evaluation of peripheral blood for the presence of neoplastic T-cell populations. C1 NCI,PATHOL LAB,BETHESDA,MD 20892. NCI,DEV THERAPEUT PROGRAM,BIOL CHEM LAB,BETHESDA,MD 20892. NCI,USN,MED ONCOL BRANCH,BETHESDA,MD 20892. NR 16 TC 32 Z9 33 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQUARE, PHILADELPHIA, PA 19106 SN 0002-9173 J9 AM J CLIN PATHOL JI Am. J. Clin. Pathol. PD DEC PY 1994 VL 102 IS 6 BP 856 EP 860 PG 5 WC Pathology SC Pathology GA PX407 UT WOS:A1994PX40700028 PM 7801904 ER PT J AU KIMURA, M TOTH, LA AGOSTINI, H CADY, AB MAJDE, JA KRUEGER, JM AF KIMURA, M TOTH, LA AGOSTINI, H CADY, AB MAJDE, JA KRUEGER, JM TI COMPARISON OF ACUTE-PHASE RESPONSES INDUCED IN RABBITS BY LIPOPOLYSACCHARIDE AND DOUBLE-STRANDED-RNA SO AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY LA English DT Article DE FEVER; LEUKOPENIA; ANTIVIRAL ACTIVITY; CERULOPLASMIN; FIBRINOGEN ID NECROSIS-FACTOR-ALPHA; LIPID-A; MURAMYL DIPEPTIDE; ENDOTOXIN; INTERFERON; SLEEP; MICE; INTERLEUKIN-6; MACROPHAGES; ENHANCEMENT AB Infection or injury results in several systemic and central reactions termed the acute phase response (APR). Substantial evidence suggests that cytokines induced by microbes initiate the APR. We compared the APR induced in rabbits by a model bacterial stimulus, Lipopolysaccharide (LPS), to that induced by a model viral stimulus, polyriboinosinic:polyribocytidylic acid (poly I:C). The cytokine mRNA responses in a mouse macrophage cell line (RAW 264.7) to LPS or poly I:C were also determined. Rabbits were injected intravenously or intracerebroventricularly with different doses of LPS or poly I:C. Colonic temperatures (T-co) and blood samples were taken at the time of injection and at 3, 6, and 24 h after injection. Leukocyte numbers, serum antiviral activity, serum ceruloplasmin, and plasma fibrinogen were analyzed. Both intravenously injected LPS and poly I:C increased T-co, decreased leukocytes, and increased ceruloplasmin. Only LPS by the intravenous route increased fibrinogen, whereas only intravenously injected poly I:C induced antiviral activity. Intracerebroventricular injections of LPS and poly I:C also elicited dose-dependent febrile responses but did not change the hematologic APR significantly except for fibrinogen. The primary distinctions between LPS and poly I:C with respect to cytokine induction in the RAW 264.7 macrophage cell line were that LPS failed to induce interferon (IFN)-alpha, poly I:C induced interleukin (IL)-6 mRNA minimally and for a shorter time period than did LPS, and LPS induced IL-1 alpha and IFN-beta more rapidly than did poly I:C. The fact that LPS and poly I:C induced different APRs and cytokine mRNAs suggests that these microbial products may contribute distinct arrays of cytokines during bacterial and viral infections, respectively. C1 UNIV TENNESSEE, DEPT PHYSIOL & BIOPHYS, MEMPHIS, TN 38163 USA. TOKYO MED & DENT UNIV, INST MED & DENT ENGN, TOKYO 101, JAPAN. UNIV TENNESSEE, DEPT COMPARAT MED, MEMPHIS, TN 38163 USA. UNIFORMED SERV UNIV HLTH SCI, DEPT PATHOL, BETHESDA, MD 20892 USA. USN, RES OFF, ARLINGTON, VA 22174 USA. NR 35 TC 53 Z9 53 U1 0 U2 1 PU AMER PHYSIOLOGICAL SOC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0363-6119 J9 AM J PHYSIOL-REG I JI Am. J. Physiol.-Regulat. Integr. Compar. Physiol. PD DEC PY 1994 VL 267 IS 6 BP R1596 EP R1605 PG 10 WC Physiology SC Physiology GA PX998 UT WOS:A1994PX99800024 ER PT J AU HABERBERGER, RL LISSNER, CR PODGORE, JK MIKHAIL, IA MANSOUR, NS KEMP, L SPEES, D GLENN, JC HAWN, RS WOODY, JN AF HABERBERGER, RL LISSNER, CR PODGORE, JK MIKHAIL, IA MANSOUR, NS KEMP, L SPEES, D GLENN, JC HAWN, RS WOODY, JN TI ETIOLOGY OF ACUTE DIARRHEA AMONG UNITED-STATES EMBASSY PERSONNEL AND DEPENDENTS IN CAIRO, EGYPT SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID ENTEROADHERENT ESCHERICHIA-COLI; TRAVELERS DIARRHEA; MILITARY PERSONNEL; SOUTH-KOREA; NORFLOXACIN; DISEASE; MEXICO; CELLS AB The purpose of this study was to identify the enteropathogens causing acute diarrheal disease in Americans living in the North Africa/Middle East region during a 34-month period from February 22, 1985 to December 30, 1987 to guide preventive and therapeutic measures. Stool specimens were examined and an epidemiologic questionnaire was administered to patients with acute diarrhea at the Outpatient Health Unit of the United States Embassy in Cairo, Egypt. The subjects consisted of 126 American employees and dependents of the U. S. Embassy in Cairo, Egypt with diarrhea of less than two-weeks duration. Subjects received routine medical care administered by the U.S. Embassy Medical staff. A possible etiologic agent was detected in 41% of the subjects. Enteroadherent Escherichia coli was the most commonly isolated enteropathogen. A high degree of antimicrobial resistance was noted among the bacterial isolates, but all were susceptible to the quinolone antibiotics. Episodes of acute diarrhea occurring among American expatriates in Cairo, Egypt were primarily of bacterial etiology, but only a small portion were caused by the bacterial pathogens routinely identified in a standard clinical bacteriology laboratory. Most of the diarrheal episodes were due to noninvasive enteroadherent E. coli that may cause prolonged disease requiring antimicrobial therapy. C1 AMER EMBASSY,HLTH UNIT,CAIRO,EGYPT. RP HABERBERGER, RL (reprint author), USN,MED RES UNIT 3,CAIRO,EGYPT. NR 21 TC 7 Z9 8 U1 0 U2 0 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 DEC PY 1994 VL 51 IS 6 BP 870 EP 874 PG 5 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA QB813 UT WOS:A1994QB81300023 PM 7810825 ER PT J AU PODGORE, JK ABUELYAZEED, RR MANSOUR, NS YOUSSEF, FG HIBBS, RG GERE, JA AF PODGORE, JK ABUELYAZEED, RR MANSOUR, NS YOUSSEF, FG HIBBS, RG GERE, JA TI EVALUATION OF A TWICE-A-WEEK APPLICATION OF 1-PERCENT NICLOSAMIDE LOTION IN PREVENTING SCHISTOSOMA-HAEMATOBIUM REINFECTION SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article AB A randomized double-blind trial was conducted to assess the efficacy of a twice-a-week application of 1% niclosamide lotion for prevention of Schistosoma haematobium reinfection. Six hundred farmers in Fayoum, Egypt, 18-40 years of age, were treated to cure their S. haematobium infection, then randomly assigned to self-apply niclosamide or placebo lotion to their Limbs, neck, and torso. Subjects were exposed to schistosomal-infested water during routine irrigation activities from April to October 1992. Three hundred fifty subjects met the inclusion criteria and completed the trial, 169 (48.3%) in the niclosamide group and 181 (51.7%) in the placebo group. The subjects assigned to the niclosamide-treated group were comparable with those in the placebo group in age (27.2 versus 27.8 years), total water contact (101.9 versus 109.0 hr), lotion application compliance (93.5% versus 90.6%), and avoidance of whole body water contact (94.7% versus 96.7%). The reinfection rate with S. haematabium was 30.8% in the niclosamide-treated group and 28.2% in the placebo group. Niclosamide lotion applied to the limbs and trunk twice a week failed to prevent S. haematobium reinfection. C1 USN,MED RES UNIT 3,CAIRO,EGYPT. USA,MED MAT DEV ACTIV,FREDERICK,MD 21702. NR 3 TC 6 Z9 7 U1 0 U2 0 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 DEC PY 1994 VL 51 IS 6 BP 875 EP 879 PG 5 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA QB813 UT WOS:A1994QB81300024 PM 7810826 ER PT J AU BANGS, MJ ANDERSEN, EM AF BANGS, MJ ANDERSEN, EM TI A CASE OF CAPILLARIASIS IN A HIGHLAND COMMUNITY OF IRIAN-JAYA, INDONESIA SO ANNALS OF TROPICAL MEDICINE AND PARASITOLOGY LA English DT Note ID INTESTINAL CAPILLARIASIS RP BANGS, MJ (reprint author), USN,MED RES UNIT 2,BOX 3,APO,AP 96520, USA. NR 9 TC 3 Z9 3 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 DEC PY 1994 VL 88 IS 6 BP 685 EP 687 PG 3 WC Public, Environmental & Occupational Health; Parasitology; Tropical Medicine SC Public, Environmental & Occupational Health; Parasitology; Tropical Medicine GA QA335 UT WOS:A1994QA33500016 PM 7893185 ER PT J AU LEE, D AF LEE, D TI A HIGH-ORDER NUMERICAL-METHOD FOR SOLVING OCEAN ACOUSTIC PROBLEMS SO APPLIED NUMERICAL MATHEMATICS LA English DT Article AB Excessive computation time can be expected in the solution of large-scale ocean acoustic propagation problems. However, a number of methods can be employed to reduce computation time. In seeking an improvement in the computation speed while maintaining the same accuracy, one should not rely solely on the advances of computer hardware. High-order numerical methods, indeed, can be used to accelerate the computation speed by reducing the number of mathematical operations required to solve a given problem. A typical ocean acoustic propagation problem is presented for discussion of its computation speed. Extending this problem to a greater dimension and a larger domain, one can expect an excessive memory requirement and intolerable computation time. The aim of this paper is to introduce a high-order numerical scheme which can be used only for the accurate solution for a class of three-dimensional ocean acoustic propagation problems, but also for the improvement of computational efficiency. Advantages and costs of using high-order schemes will be discussed. A demonstration of the improved computation speed will be shown. Moreover, the computational efficiency can be improved further if a combination of a faster computer and a high-order numerical scheme are used. RP LEE, D (reprint author), USN,CTR UNDERSEA WARFARE,NEW LONDON,CT 06320, USA. NR 10 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9274 J9 APPL NUMER MATH JI Appl. Numer. Math. PD DEC PY 1994 VL 16 IS 1-2 BP 271 EP 281 DI 10.1016/0168-9274(94)00041-7 PG 11 WC Mathematics, Applied SC Mathematics GA QE443 UT WOS:A1994QE44300016 ER PT J AU HELD, JD FOLEY, PP AF HELD, JD FOLEY, PP TI EXPLANATIONS FOR ACCURACY OF THE GENERAL MULTIVARIATE FORMULAS IN CORRECTING FOR RANGE RESTRICTION SO APPLIED PSYCHOLOGICAL MEASUREMENT LA English DT Article DE CORRECTION FORMULAS; EXPLICIT SELECTION; INCIDENTAL SELECTION; MULTIVARIATE CORRECTION FORMULAS; RESTRICTION IN RANGE; VALIDATION STUDIES ID SELECTION AB Univariate and multivariate corrections for range restriction were compared using Navy applicant scores on the Armed Services Vocational Aptitude Battery (ASVAB). Two Navy school ASVAB selector composites were used separately and together to simulate three selection situations for nine selection ratios (SRs). The selectors then were used as predictors. Composite validities (the ASVAB Mechanical Comprehension test was the criterion) were corrected using the univariate and the general multivariate formulas. In general, multivariate corrections were more accurate than univariate corrections, notably when the univariate explicit selection variable was negatively skewed and correction violations (linearity and homoscedasticity) did not offset each other. Multivariate correction accuracy was attributed to the inclusion of variables with adequate distributional properties, the compensatory effects of regression weights, and the related psychometric principle that differentially weighting a large number of correlated predictor variables has little impact on a multiple correlation. RP HELD, JD (reprint author), USN,CTR PERSONNEL RES & DEV,DEPT PERSONNEL & ORG ASSESSMENT,SAN DIEGO,CA 92152, USA. NR 30 TC 9 Z9 9 U1 2 U2 3 PU APPLIED PSYCHOLOGICAL MEASUREMENT INC PI MINNEAPOLIS PA N657 ELLIOTT HALL, UNIV OF MINNESOTA, MINNEAPOLIS, MN 55455-0344 SN 0146-6216 J9 APPL PSYCH MEAS JI Appl. Psychol. Meas. PD DEC PY 1994 VL 18 IS 4 BP 355 EP 367 DI 10.1177/014662169401800406 PG 13 WC Social Sciences, Mathematical Methods; Psychology, Mathematical SC Mathematical Methods In Social Sciences; Psychology GA RL127 UT WOS:A1994RL12700006 ER PT J AU JEONG, J GRINSTEION, FF HUSSAIN, F AF JEONG, J GRINSTEION, FF HUSSAIN, F TI EDUCATION OF COHERENT STRUCTURES IN A NUMERICALLY SIMULATED PLANE WAKE SO APPLIED SCIENTIFIC RESEARCH LA English DT Article; Proceedings Paper CT IUTAM Symposium on Eddy Structure Identification in Free Turbulent Shear Flows CY OCT 12-14, 1992 CL POITIERS, FRANCE SP INT UNION THEORET & APPL MECH, AEROSPATIALE, ALLIANT COMP SYST FRANCE, BP RES, CEA, VAUJOURS, CNRS, DEPT VIENNE, EUROPEAN COMMUNITY FLOW TURBULENCE & COMBUST, MINIST DEF, MINIST RECH & ESPACE, NAT SCI FDN USA, REG POITOU CHARENTES, SILICON GRAPH FRANCE, UNIV POITIERS, UFR CTR EDUDES AERODYNAM & THERM, VILLE POITIERS AB Coherent structures (CS) are educed using a conditional sampling technique involving alignment of vorticity patches of largest size and strength; hence we educe dominant CS. A numerically simulated spatially evolving wake of a thick flat plate is used as the database, and the inflow condition for the simulated wake includes random velocity perturbations which emulate turbulent conditions at a plate exit in the laboratory. In addition to previously educed properties such as coherent vorticity and production, and incoherent Reynolds stress and turbulence intensity, other measures such as coherent pressure and passive scalar distributions are also studied. In spite of the geometry difference, the near-wake dynamics of the plate seem quite similar to that of a cylinder. For example, turbulence is mostly produced by vortex stretching of the ribs at the saddle and then advected to the structure center, where it accumulates, and is balanced by incoherent dissipation. The distribution of coherent passive scalar indicates that mixing occurs in the saddle regions and that the mixed fluid is advected into the structure center. C1 USN,RES LAB,WASHINGTON,DC 20375. RP JEONG, J (reprint author), UNIV HOUSTON,DEPT MECH ENGN,HOUSTON,TX 77004, USA. NR 10 TC 6 Z9 6 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0003-6994 J9 APPL SCI RES JI Appl. Sci. Res. PD DEC PY 1994 VL 53 IS 3-4 BP 227 EP 236 DI 10.1007/BF00849101 PG 10 WC Thermodynamics; Mechanics SC Thermodynamics; Mechanics GA QB649 UT WOS:A1994QB64900003 ER PT J AU TURNER, MLC MOSHELL, AN CORBETT, DW STERN, JB ROTH, MJ DIGIOVANNA, J HORN, TD KRAEMER, KH AF TURNER, MLC MOSHELL, AN CORBETT, DW STERN, JB ROTH, MJ DIGIOVANNA, J HORN, TD KRAEMER, KH TI CLEARING OF MELANOMA IN-SITU WITH INTRALESIONAL INTERFERON-ALFA IN A PATIENT WITH XERODERMA-PIGMENTOSUM SO ARCHIVES OF DERMATOLOGY LA English DT Note ID DNA-REPAIR; ALPHA C1 NIAMS,BETHESDA,MD. USN,MED CTR,BETHESDA,MD 20814. JOHNS HOPKINS UNIV,SCH MED,BALTIMORE,MD. RP TURNER, MLC (reprint author), NCI,BETHESDA,MD 20892, USA. FU Intramural NIH HHS [Z01 BC004517-31] NR 11 TC 14 Z9 14 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0003-987X J9 ARCH DERMATOL JI Arch. Dermatol. PD DEC PY 1994 VL 130 IS 12 BP 1491 EP 1494 PG 4 WC Dermatology SC Dermatology GA PW468 UT WOS:A1994PW46800002 PM 7986121 ER PT J AU BROOK, I THOMPSON, DH FRAZIER, EH AF BROOK, I THOMPSON, DH FRAZIER, EH TI MICROBIOLOGY AND MANAGEMENT OF CHRONIC MAXILLARY SINUSITIS SO ARCHIVES OF OTOLARYNGOLOGY-HEAD & NECK SURGERY LA English DT Article ID CHILDREN AB Objective: Assessment of the microbiology and management of patients who suffered from chronic maxillary sinusitis was studied retrospectively. Design: Retrospective analysis of microbiology and antimicrobial therapy of 68 patients who underwent the Caldwell-Luc procedure for chronic sinusitis had not received antimicrobials before surgery and whose cultures showed bacterial growth. Setting: This study was performed at the Naval Hospital in Bethesda, Md. Intervention: Amoxicillin-clavulanic acid was given to 18 patients, amoxicillin or ampicillin to 25, cefaclor to 17, and erythromycin to eight. Results: A total of 183 isolates (123 anaerobic and 60 aerobic) were recovered. Anaerobic organisms only were recovered from 35 (51%), specimens, and aerobic or facultative bacteria only in 12 (18%), and mixed aerobic and anaerobic flora in 21 (31%). Thirty-four aerobic and anaerobic beta-lactamase-producing bacteria were isolated from 28 patients. The 18 patients who received amoxicillin-clavulanic acid had the most rapid and complete response to therapy, none required a change in therapy, and surgical drainage was required in one case. Of 25 patients who received amoxicillin or ampicillin, eight required a change of therapy due to clinical failure (32%), including three who also had surgical drainage. Of 17 that received cefaclor, five had an antibiotic change (29%), one with surgical drainage. Of the eight who were treated with erythromycin, three needed antibiotic change (38%), two with surgical drainage. Resistant organisms were recovered from most of the patients that required therapeutic change. Conclusions: These findings indicate the major role of aerobic and anaerobic beta-lactamase-producing bacteria organisms in the polymicrobial etiology of chronic max illary sinusitis and illustrate the superiority of therapy effective against these bacteria. C1 USN HOSP,DEPT INFECT DIS,BETHESDA,MD. USN HOSP,DEPT OTOLARYNGOL,BETHESDA,MD. USN HOSP,DEPT PATHOL,BETHESDA,MD. NR 10 TC 49 Z9 50 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0886-4470 J9 ARCH OTOLARYNGOL JI Arch. Otolaryngol. Head Neck Surg. PD DEC PY 1994 VL 120 IS 12 BP 1317 EP 1320 PG 4 WC Otorhinolaryngology; Surgery SC Otorhinolaryngology; Surgery GA PW007 UT WOS:A1994PW00700003 PM 7980894 ER PT J AU MEHR, DS RECTOR, JT NGO, KY AF MEHR, DS RECTOR, JT NGO, KY TI PATHOLOGICAL CASE-OF-THE-MONTH - HYDROPS-FETALIS SECONDARY TO HOMOZYGOUS ALPHA-THALASSEMIA-1 (BARTS HEMOGLOBINOPATHY) SO ARCHIVES OF PEDIATRICS & ADOLESCENT MEDICINE LA English DT Note C1 USN,MED CTR,DEPT LAB,SAN DIEGO,CA. USN,MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA. UNIV CALIF SAN DIEGO,DEPT MED,SAN DIEGO,CA 92103. RP MEHR, DS (reprint author), USN,CTR MED,DEPT INTERNAL MED,SAN DIEGO,CA, USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 1072-4710 J9 ARCH PEDIAT ADOL MED JI Arch. Pediatr. Adolesc. Med. PD DEC PY 1994 VL 148 IS 12 BP 1313 EP 1314 PG 2 WC Pediatrics SC Pediatrics GA PW006 UT WOS:A1994PW00600013 PM 7951814 ER PT J AU BULBULIAN, R CRISMAN, RP THOMAS, ML MEYER, LG AF BULBULIAN, R CRISMAN, RP THOMAS, ML MEYER, LG TI THE EFFECTS OF STRENGTH TRAINING AND CENTRIFUGE EXPOSURE ON +GZ TOLERANCE SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID SKELETAL-MUSCLES; EXERCISE; NUMBER AB Weight training (WT) as a countermeasure to +Gz intolerance seems to be an accepted modality, but lacks convincing support in the research literature. This study examines factors associated with WT in an operational environment as a countermeasure to for intolerance. Fourteen naval aviators were assigned to a WT group (n = 7) and a non-weight-trained control (NWT) group in = 7). All subjects were tested before and after a 10-week training period for aerobic capacity (Vo(2)max), dynamic muscular strength (Cybex II), body fat, gradual onset rate (GOR) for +Gz at a rate of +1 G . 15 s(-1), and finally a simulated air combat maneuver (SACM) consisting of 15 s at +4.5 or and +7 or alternating challenges to exhaustion, The results indicate the following: 1) no significant differences in any of the centrifuge variables measured between Wt and NWT groups while both groups showed a time or learning effect in SACM from 175 +/- 109 to 239 +/- 110 s (grouped data df = 16, t = 2.97, p < 0.09); 2) no improvement in SACM time for subjects achieving a 300-s sACM pretest value (n = 4); and 3) for SACM times below 300 s, the WT subjects showed a greater improvement than NWT subjects (n = 11, F = 9.12, p < 0.02). The data suggest that although some subjects showed considerable strength gains, WT in a naval aviation operational setting may not provide a universal desired effect. The observed conflicting results may be due to variation of one or more of the following: sampling of subjects, SACM protocols, subject motivation, data interpretation strategies, and statistical procedures. These factors may contribute to the equivocal results found in the published literature. The data do provide evidence for the benefits of centrifuge exposure in improving +Gz tolerance in both WT and control subjects, and the possibility that specific subgroups of subjects (pilots) may derive greater benefit than others from weight training. C1 UNIV KENTUCKY,HUMAN PERFORMANCE LAB,LEXINGTON,KY. RP BULBULIAN, R (reprint author), USN,AEROSP MED RES LAB,PENSACOLA,FL, USA. NR 30 TC 5 Z9 5 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 DEC PY 1994 VL 65 IS 12 BP 1097 EP 1104 PG 8 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA PV821 UT WOS:A1994PV82100005 PM 7872910 ER PT J AU TREECE, RE HORWITZ, JS CHRISEY, DB DONOVAN, EP QADRI, SB AF TREECE, RE HORWITZ, JS CHRISEY, DB DONOVAN, EP QADRI, SB TI PULSED-LASER ABLATION SYNTHESIS OF NBNX (0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1.3) THIN-FILMS SO CHEMISTRY OF MATERIALS LA English DT Note ID DEPOSITION; NITRIDE; NIOBIUM; GROWTH AB Reactive pulsed laser deposition has been used to control the composition and phase of niobium nitride (NbN(x)) films deposited from a Nb target in a N2 (90%)/H2 (10%) atmosphere onto MgO (100) substrates. The nitrogen content of the NbN(x) (0 less-than-or-equal-to x less-than-or-equal-to 1.3) films increased with gas pressure. The assignments of the single-phase films of oriented Nb, Nb2N, NbN, and Nb3N4 were based on X-ray diffraction, Rutherford backscattering spectroscopy, and temperature-dependent resistivity measurements. RP TREECE, RE (reprint author), USN,RES LAB,CODE 6674,WASHINGTON,DC 20375, USA. NR 32 TC 12 Z9 12 U1 1 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD DEC PY 1994 VL 6 IS 12 BP 2205 EP 2207 DI 10.1021/cm00048a002 PG 3 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA PY663 UT WOS:A1994PY66300002 ER PT J AU WALDRON, A AF WALDRON, A TI THE POWER OF THE GUN - THE EMERGENCE OF MODERN CHINESE WARLORDISM - MCCORD,EA SO CHINA QUARTERLY LA English DT Book Review C1 BROWN UNIV, PROVIDENCE, RI 02912 USA. RP WALDRON, A (reprint author), USN, COLL WAR, WASHINGTON, DC USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA SN 0305-7410 J9 CHINA QUART JI China Q. PD DEC PY 1994 IS 140 BP 1159 EP 1160 PG 2 WC Area Studies SC Area Studies GA QP218 UT WOS:A1994QP21800041 ER PT J AU MCKIRNAN, MD WILLIAMS, RL LIMJOCO, U RAGLAND, J GRAY, CG AF MCKIRNAN, MD WILLIAMS, RL LIMJOCO, U RAGLAND, J GRAY, CG TI HYPERTONIC SALINE DEXTRAN VERSUS LACTATED RINGERS TREATMENT FOR HEMORRHAGE IN DEHYDRATED SWINE SO CIRCULATORY SHOCK LA English DT Article DE HEMORRHAGE; DEHYDRATION; HYPERTONIC SALINE; HEMODYNAMICS; RESUSCITATION; SWINE ID SMALL-VOLUME RESUSCITATION; 6-PERCENT DEXTRAN-70; CONSCIOUS SWINE; 7.5-PERCENT NACL; OXYGEN DELIVERY; RENAL-FUNCTION; SHOCK; RESPONSES; PIGS; SHEEP AB To determine the efficacy of low-volume resuscitation in dehydrated subjects, 7.5% hypertonic saline/6% dextran 70 (HSD) and lactated Ringer's (LR) treatments were compared in conscious pigs dehydrated for 48 hr prior to a 37% blood volume hemorrhage. Pigs randomized to treatment were resuscitated with equivalent sodium loads of either HSD (4 ml/kg) or LR (33.3 ml/kg) following the 60-min hemorrhage. Dehydration resulted in a 7-8% body weight loss. Mortality through 180 min of recovery was 1/13 (7.7%) for HSD, fill (9.1%) for LR, and 4/8 (50%) for a group of dehydrated and untreated controls (DC). HSD and LR solutions elicited similar heart rate, cardiac output, arterial pressure, and oxygen transport responses in the recovery period following hemorrhage and resuscitation. HSD was as effective as LR in expanding plasma volume in dehydrated hemorrhaged pigs. Serum chemistries provided no evidence for a sustained systemic toxicity from [HSD treatment. These findings support low-volume HSD resuscitation of hemorrhagic shock in moderately dehydrated subjects. (C) 1995 Wiley-Liss, Inc. C1 USN,MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA. USN,MED CTR,DEPT GEN SURG,SAN DIEGO,CA. RP MCKIRNAN, MD (reprint author), UNIV CALIF SAN DIEGO,DEPT PATHOL,9500 GILMAN DR,LA JOLLA,CA 92093, USA. NR 31 TC 13 Z9 14 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0092-6213 J9 CIRC SHOCK JI Circ. Shock PD DEC PY 1994 VL 44 IS 4 BP 238 EP 246 PG 9 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA QZ968 UT WOS:A1994QZ96800011 PM 7543031 ER PT J AU BLAKELY, P COSBY, RL MCDONALD, BR AF BLAKELY, P COSBY, RL MCDONALD, BR TI NEPHRITIC URINARY SEDIMENT IN EMBOLIC RENAL INFARCTION SO CLINICAL NEPHROLOGY LA English DT Note DE HEMATURIA; URINALYSIS; NEPHRITIS; EMBOLISM AB Emboli to the renal arteries occurs most often in patients with underlying cardiac disease. Hematuria is a common feature of renal infarction, but the finding of erythrocyte casts in cases of renal infarction has not been commonly reported. We report a case of renal artery embolization in a patient who had transient nephritic urine sediment, and review the significance of this finding. C1 USN,CTR MED,DEPT CLIN INVEST,SAN DIEGO,CA 92134. UNIV CALIF SAN DIEGO,SAN DIEGO,CA. USN,MED CTR,DEPT INTERNAL MED,DIV NEPHROL,SAN DIEGO,CA. NR 10 TC 2 Z9 2 U1 0 U2 0 PU DUSTRI-VERLAG DR KARL FEISTLE PI MUNCHEN-DEISENHOFEN PA BAHNHOFSTRABE 9 POSTFACH 49, W-8024 MUNCHEN-DEISENHOFEN, GERMANY SN 0301-0430 J9 CLIN NEPHROL JI Clin. Nephrol. PD DEC PY 1994 VL 42 IS 6 BP 401 EP 403 PG 3 WC Urology & Nephrology SC Urology & Nephrology GA PX501 UT WOS:A1994PX50100009 PM 7882605 ER PT J AU MOGLESTUE, C BUOT, F ANDERSON, WT AF MOGLESTUE, C BUOT, F ANDERSON, WT TI THERMALLY-INDUCED FAILURE IN GAAS TRANSISTORS EXPOSED TO ALPHA-PARTICLE IRRADIATION SO COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING LA English DT Article; Proceedings Paper CT 10th International Conference on the Numerical Analysis of Semiconductor Devices and Integrated Circuits (NASECODE X) CY JUN, 1994 CL DUBLIN, IRELAND ID SEMICONDUCTOR-METAL PHOTODETECTORS; FIELD-EFFECT TRANSISTORS; INFRARED PHOTODETECTORS; SIMULATION AB The response of a MESFET and an inverted HEMT to the impact of an a particle has been calculated by means of the Monte Carlo Particle Model, a technique for solving Boltzmann's transport and Poisson's field equation self-consistently in space and time. The calculations show that all the terminals of the MESFET react by generating an initial current pulse followed by another; the timing of the second pulse depends on the angle of incidence of the a particle. The lattice heating rate was found to be largest at the corners of the Ohmic contacts. The HEMT, on the other hand, hardly reacts electrically to the a particle but is more likely to burn out in an a particle radiation environment because of the larger lattice heat generation taking place in the interior of the transistor. The results also support the theory of the hot-electron induced subsurface catastrophic failure mechanism. C1 USN,RES LAB,WASHINGTON,DC 20375. RP MOGLESTUE, C (reprint author), FRAUNHOFER INST APPL SOLID STATE PHYS,TULLASTR 72,D-79108 FREIBURG,GERMANY. NR 17 TC 0 Z9 0 U1 0 U2 2 PU MCB UNIV PRESS LTD PI BRADFORD PA 60/62 TOLLER LANE, BRADFORD, W YORKSHIRE, ENGLAND BD8 9BY SN 0332-1649 J9 COMPEL JI Compel-Int. J. Comp. Math. Electr. Electron. Eng. PD DEC PY 1994 VL 13 IS 4 BP 641 EP 652 DI 10.1108/eb051881 PG 12 WC Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic; Mathematics, Applied SC Computer Science; Engineering; Mathematics GA RA591 UT WOS:A1994RA59100007 ER PT J AU LEWIS, T AF LEWIS, T TI THE DARK SIDE OF OBJECTS SO COMPUTER LA English DT Article RP LEWIS, T (reprint author), USN,POSTGRAD SCH,WASHINGTON,DC 20350, 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 90720-1264 SN 0018-9162 J9 COMPUTER JI Computer PD DEC PY 1994 VL 27 IS 12 BP 6 EP 7 PG 2 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA PW271 UT WOS:A1994PW27100002 ER PT J AU ROBERTSON, RC HA, TT AF ROBERTSON, RC HA, TT TI EFFECT OF CAPTURE ON THROUGHPUT OF VARIABLE-LENGTH PACKET ALOHA SYSTEMS SO COMPUTER COMMUNICATIONS LA English DT Article DE RADIO COMMUNICATIONS; NEAR FAR EFFECT; PACKET CAPTURE ID CHANNELS AB The effect of the capture phenomenon on the throughput of a radio communications system using the Aloha random access protocol with variable length packets is examined. In a packet radio communications system, the base station typically receives stronger signals from near users than from far users, leading to the so-called 'near/far effect'. The packet capture phenomenon, in which a packet captures the base station receiver when its signal-to-interface ratio exceeds some threshold, is a consequence of the near/far effect. System throughput with capture is obtained analytically in terms of a tagged packet's conditional capture probability using the most general packet length distribution, i.e. packet length is taken to be exponentially distributed. The maximum throughput and the channel traffic rate corresponding to the maximum throughput of a variable packet Aloha system with capture are both considerably higher than that of a comparable system without capture. Depending on the threshold, the maximum throughput and the channel traffic rate corresponding to maximum throughput of a variable packet Aloha system with capture can be as much as 67% and 120% higher (resp.) than that of a comparable system without capture. Consequently, not only throughput but also the stability of the system is enhanced by the capture effect. RP ROBERTSON, RC (reprint author), USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,CODE ECRC,MONTEREY,CA 93043, USA. NR 15 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0140-3664 J9 COMPUT COMMUN JI Comput. Commun. PD DEC PY 1994 VL 17 IS 12 BP 836 EP 842 PG 7 WC Computer Science, Information Systems; Engineering, Electrical & Electronic; Telecommunications SC Computer Science; Engineering; Telecommunications GA PV264 UT WOS:A1994PV26400002 ER PT J AU HOFFMAN, E MANKIN, A PEREZ, M MARSH, SJ AF HOFFMAN, E MANKIN, A PEREZ, M MARSH, SJ TI VINCE - VENDOR INDEPENDENT (AND ARCHITECTURE FLEXIBLE) NETWORK CONTROL SO COMPUTER NETWORKS AND ISDN SYSTEMS LA English DT Article; Proceedings Paper CT Annual Conference of the Internet-Society/5th Joint European Networking Conference (INET 94/JENCS5) CY JUN 13-17, 1994 CL PRAGUE, CZECH REPUBLIC SP INTERNET SOC AB This paper discusses experience gained while implementing Vince, a publicly available software package for the development of protocols in ATM networks. Vince provides a simple set of general abstractions which are extremely useful for protocol development and experimentation. RP HOFFMAN, E (reprint author), USN,RES LAB,8601 LONG ACAC,BETHESDA,MD, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7552 J9 COMPUT NETWORKS ISDN JI Comput. Netw. ISDN Syst. PD DEC PY 1994 VL 27 IS 3 BP 471 EP 478 DI 10.1016/0169-7552(94)90121-X PG 8 WC Computer Science, Information Systems; Engineering, Electrical & Electronic; Telecommunications SC Computer Science; Engineering; Telecommunications GA PY456 UT WOS:A1994PY45600016 ER PT J AU MANSFELD, F LIU, G XIAO, H TSAI, CH LITTLE, BJ AF MANSFELD, F LIU, G XIAO, H TSAI, CH LITTLE, BJ TI THE CORROSION BEHAVIOR OF COPPER-ALLOYS, STAINLESS-STEELS AND TITANIUM IN SEAWATER SO CORROSION SCIENCE LA English DT Article ID MICROBIOLOGICALLY INFLUENCED CORROSION; SULFIDE-POLLUTED SEAWATER; CU-NI ALLOYS; NATURAL SEAWATER; NICKEL-ALLOYS AB Effects of mass transport, corrosion products and biofilm formation an corrosion kinetics of five copper alloys, four stainless steels and titanium grade 2 exposed to natural and artificial seawater were determined. Corrosion current density (i(corr)), anodic (b(a)) and cathodic (b(c)) Tafel slopes were determined from analysis of polarization curves recorded in the vicinity of the corrosion potential (E(corr)) under controlled mass transport conditions as a function of exposure time. Rotating cylinder electrode experiments demonstrated that E(corr) and corrosion rate for stainless steels and titanium were independent of mass transport. For copper alloys i(corr) depended linearly on rotation speed r(0.7), while E(corr) was independent of mass transport. These results indicate that both cathodic and anodic reactions for stainless steels and titanium are under charge transfer control, whereas these reactions are under mass transport control for copper alloys. Corrosion rates of copper alloys were also obtained using linear polarization and weight loss. Corrosion rates obtained with the two methods agreed for exposures in artificial seawater. In natural seawater, corrosion rates determined with linear polarization underestimated corrosion rates from weight loss data by a factor of two or more. Environmental and traditional scanning electron microscopy coupled with energy-dispersive X-ray analyses were used to document surface topography, bacterial colonization and form of corrosion after removal of corrosion products. De-alloying of all copper alloys occurred in natural seawater. Intergranular corrosion was observed for 70Cu-30Ni alloy under elliptical deposits of embedded diatoms. De-alloying and intergranular corrosion did not occur in artificial seawater. Sulfides produced by bacteria may have accelerated attack of nickel in grain boundaries of 70Cu-30Ni alloy. C1 USN,RES LAB,BAY ST LOUIS,MS 39529. RP MANSFELD, F (reprint author), UNIV SO CALIF,DEPT MAT SCI & ENGN,CORROS & ENVIRONM EFFECTS LAB,LOS ANGELES,CA 90089, USA. NR 37 TC 72 Z9 79 U1 11 U2 45 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0010-938X J9 CORROS SCI JI Corrosion Sci. PD DEC PY 1994 VL 36 IS 12 BP 2063 EP 2095 DI 10.1016/0010-938X(94)90008-6 PG 33 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA QA585 UT WOS:A1994QA58500008 ER PT J AU GEIS, MW EFREMOW, NN SUSALKA, R TWICHELL, JC SNAIL, KA SPIRO, C SWEETING, B HOLLY, S AF GEIS, MW EFREMOW, NN SUSALKA, R TWICHELL, JC SNAIL, KA SPIRO, C SWEETING, B HOLLY, S TI MOSAIC DIAMOND SUBSTRATES APPROACHING SINGLE-CRYSTAL QUALITY USING CUBE-SHAPED DIAMOND SEEDS SO DIAMOND AND RELATED MATERIALS LA English DT Article DE MOSAIC DIAMOND SUBSTRATES; HETEROEPITAXY; SINGLE CRYSTALS ID BIAS-ENHANCED NUCLEATION; TEXTURED GROWTH; FILMS; SILICON AB Large-area (approximately 1 cm(2)) mosaic diamond substrates were obtained by orienting smaller (250 mu m on a side) diamond cubes and fusing them homoepitaxially. The orientation starts by distributing a single layer of several hundred cubes on a smooth substrate. The cubes are then wetted with a mixture of isopropyl alcohol and glycerin, whose surface tension causes the cubes to coalesce into domains consisting of 20-30 cubes. The cubes in each domain have the same crystallographic orientation, but the domains are randomly oriented to each other. Two techniques were found to produce consistent orientation of the domains. One technique is to orient the domains physically against to 1 mm high, vertical, square walls on the substrate. The other technique is to push physically on the layer of cubes, which deforms the domains causing them to rotate and form a layer with consistent orientation. After the layer of cubes is oriented, homoepitaxial diamond is grown on it to obtain a continuous mosaic substrate. Depending on the techniques used, orientation with a standard deviation from 1 degrees to 5 degrees can be achieved. C1 USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375. GE CO,CORP RES & DEV,SCHENECTADY,NY 12301. ROCKETDYNE ROCKWELL INT,CANOGA PK,CA. RP GEIS, MW (reprint author), MIT,LINCOLN LAB,244 WOOD ST,LEXINGTON,MA 02173, USA. NR 20 TC 12 Z9 12 U1 1 U2 4 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-9635 J9 DIAM RELAT MATER JI Diam. Relat. Mat. PD DEC PY 1994 VL 4 IS 1 BP 76 EP 82 DI 10.1016/0925-9635(94)90072-8 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA QB457 UT WOS:A1994QB45700014 ER PT J AU SHEN, CY EVANS, T AF SHEN, CY EVANS, T TI ON VORTICITY SHEDDING BY UNSTABLE JETS SO DYNAMICS OF ATMOSPHERES AND OCEANS LA English DT Article ID GEOSTROPHIC TURBULENCE; BAROCLINIC INSTABILITY; DYNAMICS; UNIFORM AB The process by which unstable jets shed vorticity is investigated numerically for Gaussian jets with a quasi-geostrophic model. The shedding process that occurs in jets evolved from potential-vorticity-conserving perturbations is compared with that from transport-conserving perturbations given in the literature. The differences in vorticity pool formation and meander pinch-off between the two situations are discussed for the barotropic jets on a beta-plane. The concept of acceleration potential is applied to show that the jet instability and vorticity shedding occur through the feedback between the jet meander and vorticity flux convergence. The analysis is extended to two-layer baroclinic jets. It is shown that the vortex stretching produced by the isopycnal displacement stabilizes the jets as beta does and that such an effect allows meander pinch-off. The mixed barotropic-baroclinic instability of the Gaussian jet is shown to occur as a result of the phase difference between the destabilizing vorticity flux convergence and the stabilizing vortex stretching. RP SHEN, CY (reprint author), USN,RES LAB,CODE 7250,WASHINGTON,DC 20375, USA. NR 16 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0377-0265 J9 DYNAM ATMOS OCEANS JI Dyn. Atmos. Oceans PD DEC PY 1994 VL 21 IS 2-3 BP 105 EP 135 PG 31 WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Oceanography SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Oceanography GA QC387 UT WOS:A1994QC38700003 ER PT J AU JEROME, CE AF JEROME, CE TI MAXILLARY MOLAR ROOT FRACTURE CAUSED BY SINUS SURGERY - CASE-REPORT SO ENDODONTICS & DENTAL TRAUMATOLOGY LA English DT Note DE DENTAL TRAUMA; ROOT FRACTURE; MAXILLARY SINUS AB A case is presented in which a horizontal root fracture of the mesiobuccal root of a maxillary first molar was diagnosed as the source of a patient's chronic pain. Horizontal root fractures are rare in posterior teeth. The source of the fracture was determined to be trauma from access or curettage during two Caldwell-Luc sinus procedures. A detailed history and endodontic retreatment led to the diagnosis. A mesiobuccal root resection resolved the chronic pain. C1 USN,CTR DENT,DEPT ENDODONT,SAN DIEGO,CA 92132. NR 0 TC 4 Z9 5 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0109-2502 J9 ENDOD DENT TRAUMATOL JI Endod. Dent. Traumatol. PD DEC PY 1994 VL 10 IS 6 BP 286 EP 288 PG 3 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA PZ016 UT WOS:A1994PZ01600008 PM 7867618 ER PT J AU DAVIS, GW WU, C AF DAVIS, GW WU, C TI OPTIMAL PERFORMANCE OF A GEOTHERMAL HEAT-ENGINE-DRIVEN HEAT-PUMP SYSTEM SO ENERGY LA English DT Article ID MAXIMUM-POWER; FINITE-TIME; EFFICIENCY; THERMODYNAMICS AB A geothermal heat-powered, low-temperature Rankine cycle is suitable for the operation of a conventional mechanical compression heat-pump cycle in providing heating and cooling loads. This system is analyzed using a finite-time thermodynamic approach. The only irreversibilities are associated with heat transfer between the system and surrounding thermal reservoirs. RP DAVIS, GW (reprint author), USN ACAD,DEPT MECH ENGN,ANNAPOLIS,MD 21402, USA. NR 8 TC 5 Z9 5 U1 0 U2 0 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 DEC PY 1994 VL 19 IS 12 BP 1219 EP 1223 DI 10.1016/0360-5442(94)90024-8 PG 5 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA PY021 UT WOS:A1994PY02100004 ER PT J AU HAGAN, M PATCHEN, M WEINBERG, S MACVITTIE, T AF HAGAN, M PATCHEN, M WEINBERG, S MACVITTIE, T TI ERYTHROID PROGENITOR (BFU-E, CFU-E) PROLIFERATION AS INFERRED FROM 5'BROMODEOXYURIDINE LABELING SO EXPERIMENTAL HEMATOLOGY LA English DT Article DE BFU-E; PROLIFERATION; BROMODEOXYURIDINE; CFU-E; STEM CELLS ID MOUSE BONE-MARROW; HEMATOPOIETIC STEM; MICE; CELLS; ERYTHROPOIETIN; DIFFERENTIATION; PRECURSORS; INVITRO AB Survival patterns of burst-forming unit-erythroid (BFU-E) and cluster-forming unit-erythroid (CFU-E) were studied in B6D2F1 mice after 5'bromodeoxycytidine (BrdCyd) infusion and near-ultraviolet (near-UV) light treatment. Comparison of the kinetics of BrdCyd sensitization of these colony formers with the kinetics of granulocyte-monocyte colony-forming cells (GM-CFC) and colony-forming unit-spleen (CFU-S) demonstrated a similar, but distinguishable, pattern of labeling between BFU-E and CFU-S. BFU-E and CFU-S each contain a subpopulation of unlabeled cells that diminishes with a half-life of 35 to 40 hours. Subsequent comparisons of this close association of BFU-E and CFU-S in Sl/Sl(d) mice, again, showed similar patterns of BrdCyd labeling without evidence of an unlabeled or Go subpopulation. These results are dis- cussed with respect to the likelihood of a precursor relationship between these two cell types. C1 MASSACHUSETTS GEN HOSP,DEPT RADIOL,BOSTON,MA 02114. ARMED FORCES RADIOBIOL RES INST,DEPT EXPTL HEMATOL,BETHESDA,MD 20814. USN,MED RES & DEV COMMAND,BETHESDA,MD. NR 33 TC 1 Z9 1 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 DEC PY 1994 VL 22 IS 13 BP 1221 EP 1226 PG 6 WC Hematology; Medicine, Research & Experimental SC Hematology; Research & Experimental Medicine GA PT541 UT WOS:A1994PT54100001 PM 7957708 ER PT J AU LIGRANI, PM LONGEST, JE KENDALL, MR FIELDS, WA AF LIGRANI, PM LONGEST, JE KENDALL, MR FIELDS, WA TI SPLITTING, MERGING AND SPANWISE WAVE-NUMBER SELECTION OF DEAN VORTEX PAIRS SO EXPERIMENTS IN FLUIDS LA English DT Article ID CURVED CHANNEL FLOW; WAVELENGTH SELECTION; VORTICES; INSTABILITIES; TRANSITION; ROTATION AB Splitting, merging and spanwise wavenumber selection are studied during the initial development of Dean vortex pairs in a channel with mild curvature, an aspect ratio of 40, and an inner to outer radius ratio of 0.979. Two types of splitting events, and four types of merging events are evident from flow visualizations at Dean numbers from 75 to 220. These events are described in detail along with observations that occurrences of these different events are tied to spatial and temporal variations of spanwise wavenumbers of vortex pair spacing. Also discussed are frequency spectra of different events, recurrent phenomena, and the part played by splitting and merging in laminar to turbulent transition in curved channels. C1 USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943. RP LIGRANI, PM (reprint author), UNIV UTAH,DEPT MECH ENGN,SALT LAKE CITY,UT 84112, USA. NR 40 TC 14 Z9 14 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0723-4864 J9 EXP FLUIDS JI Exp. Fluids PD DEC PY 1994 VL 18 IS 1-2 BP 41 EP 58 PG 18 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA PX823 UT WOS:A1994PX82300006 ER PT J AU GOLDSCHLAG, DM AF GOLDSCHLAG, DM TI MECHANICALLY VERIFYING SAFETY AND LIVENESS PROPERTIES OF DELAY INSENSITIVE CIRCUITS SO FORMAL METHODS IN SYSTEM DESIGN LA English DT Article DE AUTOMATED THEOREM PROVING; HARDWARE VERIFICATION; DELAY INSENSITIVE CIRCUITS AB This paper describes, by means of an example, how one may mechanically verify delay insensitive circuits on an automated theorem prover. It presents the verification of both the safety and liveness properties of an n-node delay insensitive FIFO circuit [20]. The proof system used is a mechanized implementation of Unity [7] on the Boyer-Moore prover [4], described in [12]. This paper describes the circuit formally in the Boyer-Moore logic and presents the mechanically verified correctness theorems. The formal description also captures the protocol that the circuit expects its environment to obey and specifies a class of suitable initial states. This paper demonstrates how a general purpose automated proof system for concurrent programs may be used to mechanically verify both the safety and liveness properties of arbitrary sized delay insensitive circuits. C1 USN,RES LAB,WASHINGTON,DC 20375. NR 33 TC 2 Z9 2 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0925-9856 J9 FORM METHOD SYST DES JI Form. Methods Syst. Des. PD DEC PY 1994 VL 5 IS 3 BP 207 EP 225 DI 10.1007/BF01383831 PG 19 WC Computer Science, Theory & Methods SC Computer Science GA PX901 UT WOS:A1994PX90100002 ER PT J AU DEMETS, C GORDON, RG VOGT, P AF DEMETS, C GORDON, RG VOGT, P TI LOCATION OF THE AFRICA-AUSTRALIA-INDIA TRIPLE JUNCTION AND MOTION BETWEEN THE AUSTRALIAN AND INDIAN PLATES - RESULTS FROM AN AEROMAGNETIC INVESTIGATION OF THE CENTRAL INDIAN AND CARLSBERG RIDGES SO GEOPHYSICAL JOURNAL INTERNATIONAL LA English DT Article DE AFRICA; AUSTRALIA; GEOMAGNETIC FIELD; INDIA; PLATE MOTION; TRIPLE JUNCTION ID MOMENT TENSOR SOLUTIONS; BODY-WAVEFORM INVERSION; MID-OCEAN RIDGES; INTRAPLATE DEFORMATION; JANUARY MARCH; HISTORICAL SEISMICITY; MAGNETIC-ANOMALIES; STATISTICAL TESTS; SOURCE MECHANISMS; TRANSFORM-FAULT AB Prior studies have proposed and examined the hypothesis that India and Australia are separate rigid plates separated by a wide, near-equatorial, E-W striking, plate boundary. Attempts to place narrow limits on the location of the Africa-Australia-India triple junction have been hindered, however, by the lack of useful magnetic profiles crossing the eastern Carlsberg Ridge and northern Central Indian Ridge. Herein we present near-ridge portions of new profiles from an aeromagnetic survey of the Carlsberg Ridge east of 66 degrees E and of the Central Indian Ridge north of 19 degrees S. These new data are used to estimate 35 new spreading rates averaged from the middle of chron 2A (3.03 Ma) to the present. All other plate motion data along the Central Indian and Carlsberg ridges are also analysed to investigate the present kinematics of the Indian Ocean, especially the motion and boundary between the Indian and Australian plates. Unlike prior efforts, we objectively estimate uncertainties in the strikes of transform faults along the Carlsberg and Central Indian ridges. Indian Ocean plate motion data are unambiguously inconsistent with a model in which India and Australia lie on the same rigid plate, but remain consistent with the existence of distinct and rigid Indian and Australian plates. The plate motion data also remain consistent with closure of the Africa-Arabia-India plate motion circuit. The data are consistent with closure of the Africa-Antarctic-Australia plate motion circuit and place an upper bound of 7 mm yr-l on the summed deformation around the Rodriguez triple junction if we have accurately estimated the errors in the data. From data along the Carlsberg and Central Indian Ridges, 95 per cent confidence limits on the location of the Africa-Australia-India triple junction are 6.2 degrees S to similar to 9 degrees S if the boundary between India and Australia is discrete (i.e. very narrow) where it intersects the Central Indian Ridge. When closure is enforced about the Owen and Rodriguez triple junctions, these limits decrease to 8 degrees S-9 degrees S, which is centred on the Vema fracture zone and is more than 10 times narrower than we found without the new data. The resulting specific prediction of the location of, and velocity across, a hypothetical narrow boundary between the Indian and Australian plates permits us to test the hypothesis of a narrow boundary. Available data suggest, but do not prove, that no such narrow boundary accommodating the predicted direction of motion exists. We think it likely that the motion is taken up on many fracture zones between similar to-8 degrees S and similar to-4 degrees S, which is an interval containing most of the near-, but off-ridge, seismicity. The confidence limits on the new angular velocities, especially those describing the motion between India and either Africa or Australia, are much smaller than we found before. In particular the NW-oriented axis of the confidence ellipse of the India-Australia pole of rotation is seven times smaller than we found before. The shrinking of these uncertainties is accompanied by a shrinking of the uncertainties in the predicted velocities between India and Australia. For example, a point (8.5 degrees S, 68.3 degrees E) assumed to be on the Australian plate near the Central Indian Ridge moves 5.1 +/- 2.2 mm yr(-1) toward S38 +/- 12 degrees E (95 per cent confidence limits) relative to the Indian plate, indicating net divergence of Australia from India along a N-S profile near the Central Indian Ridge. A point (11 degrees S, 90 degrees E) assumed to be on the Australian plate near the Ninetyeast Ridge moves 9.8 +/- 2.4 mm yr(-1) toward N27 +/- 12 degrees E relative to the Indian plate, indicating net convergence of Australia toward India along a N-S profile through the Ninetyeast Ridge. These now very specific predictions remain consistent with independent data that indicate the orientation and (to a lesser extent) the rate of deformation in the zone between India and Australia. The data reinforce our earlier conclusion that the most important way in which shortening is taken up in the non-subducting convergent portion of the plate boundary, i.e. the eastern portion, is by strike-slip faulting and north-eastward delivery of oceanic lithosphere to the Java-Sumatra trench. C1 LAB GEODYNAM SOUS MARINE, F-06230 VILLEFRANCHE MER, FRANCE. USN, RES LAB, WASHINGTON, DC 20375 USA. RP UNIV WISCONSIN, DEPT GEOL & GEOPHYS, 1215 W DAYTON ST, MADISON, WI 53706 USA. NR 82 TC 58 Z9 60 U1 0 U2 3 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0956-540X EI 1365-246X J9 GEOPHYS J INT JI Geophys. J. Int. PD DEC PY 1994 VL 119 IS 3 BP 893 EP 930 DI 10.1111/j.1365-246X.1994.tb04025.x PG 38 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA PW398 UT WOS:A1994PW39800018 ER PT J AU HUMPHREY, DG KRAMER, AF STANNY, RR AF HUMPHREY, DG KRAMER, AF STANNY, RR TI INFLUENCE OF EXTENDED WAKEFULNESS ON AUTOMATIC AND NONAUTOMATIC PROCESSING SO HUMAN FACTORS LA English DT Article ID TERM RECOGNITION MEMORY; VISUAL-SEARCH; ATTENTIONAL REQUIREMENTS; COMPONENT CONSISTENCY; P300 LATENCY; SLEEP LOSS; TASK; PERFORMANCE AB We investigated the influence of extended wakefulness on automatic and nonautomatic processes in memory and visual search tasks. Subjects were trained in consistently mapped and variably mapped versions of each task, attaining automatic performance in the consistently mapped versions. We then recorded performance measures and event-related brain potentials for a 14-h period that began during the evening of the last day of training. Overall performance declined with extended wakefulness, but the benefits of consistently mapped training were retained throughout the night. Performance decrements consisted of an increase in nonresponses, increased response latencies, and decreased accuracies. P300 latencies increased, and P300 amplitudes decreased with extended wakefulness. When viewed together, reaction time and event-related brain potentials measures suggest that the locus of extended wakefulness effects was during early perceptual processes. C1 UNIV ILLINOIS,BECKMAN INST,URBANA,IL 61801. PENSACOLA NAVAL AIR STN,PENSACOLA FLORIDA NAVAL AEROSP MED RES LAB,PENSACOLA,FL. NR 48 TC 42 Z9 43 U1 1 U2 2 PU HUMAN FACTORS SOC PI SANTA MONICA PA BOX 1369, SANTA MONICA, CA 90406 SN 0018-7208 J9 HUM FACTORS JI Hum. Factors PD DEC PY 1994 VL 36 IS 4 BP 652 EP 669 PG 18 WC Behavioral Sciences; Engineering, Industrial; Ergonomics; Psychology, Applied; Psychology SC Behavioral Sciences; Engineering; Psychology GA QG371 UT WOS:A1994QG37100006 PM 7875692 ER PT J AU SCHEPS, R AF SCHEPS, R TI ER3+YA1O(3) UP-CONVERSION LASER SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article ID UP-CONVERSION LASER; AVALANCHE UPCONVERSION; PHOTON AVALANCHE; POWER AB Upconversion lasing in Er:YAlO3 is reported. Laser emission was produced using both sequential two-step pumping and cross-relaxation energy transfer. In addition, photon avalanche upconversion pumping was demonstrated. Selection among these pumping mechanisms is determined by the pump wavelength, and laser operation was obtained with excitation between 785 nm and 840 nm. The highest laser output power was achieved at 34 degrees K, where 918 mW of pump power at 807 nm produced 121 mW of TEM(00) emission. The optical conversion efficiency was 13%. Repetitively Q-switched operation is reported, and the tenporal- and temperature-dependence of the laser output is discussed. RP SCHEPS, R (reprint author), USN,NAVAL COMMAND,CTR CONTROL & OCEAN SURVEILLANCE,DIV RDT&E,CODE 754,SAN DIEGO,CA 92152, USA. NR 39 TC 37 Z9 38 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 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD DEC PY 1994 VL 30 IS 12 BP 2914 EP 2924 DI 10.1109/3.362717 PG 11 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA QC405 UT WOS:A1994QC40500023 ER PT J AU BOWMAN, SR GANEM, J FELDMAN, BJ KUENY, AW AF BOWMAN, SR GANEM, J FELDMAN, BJ KUENY, AW TI INFRARED-LASER CHARACTERISTICS OF PRASEODYMIUM-DOPED LANTHANUM TRICHLORIDE SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article ID ABSORPTION AB We report new laser channels for the rare earth praseodymium. Laser emissions at 1.6 and 5.2 mu m were studied using a 2.0 mu m Tm : YAG laser to pump the F-3(2) level in Pr3+ : LaCl3. Efficient 5 mu m operation was demonstrated at 130 K. Temperature dependence of the 5 mu m laser threshold was determined in the range from 130 to 250 K. The complex dynamics and potential utility of these new rare earth lasers are discussed. , C1 LORAL VOUGHT SYST,DALLAS,TX 75265. RP BOWMAN, SR (reprint author), USN,RES LAB,LASER PHYS BRANCH,CODE 5640,WASHINGTON,DC 20375, USA. NR 12 TC 43 Z9 43 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD DEC PY 1994 VL 30 IS 12 BP 2925 EP 2928 DI 10.1109/3.362716 PG 4 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA QC405 UT WOS:A1994QC40500024 ER PT J AU WEI, P ZEIDLER, JR KU, WH AF WEI, P ZEIDLER, JR KU, WH TI ADAPTIVE INTERFERENCE SUPPRESSION FOR CDMA OVERLAY SYSTEMS SO IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS LA English DT Article ID SPREAD-SPECTRUM SYSTEMS; NARROW-BAND INTERFERENCE; PERFORMANCE ANALYSIS; REJECTION TECHNIQUES; PREDICTION FILTERS; NOISE; ENHANCEMENT AB It has been proposed that CDMA systems can be assigned to spectral bands which are presently occupied by narrowband users to further increase spectral capacity, Such CDMA overlay systems could provide new options for efficient utilization of the spectrum with minimal disruption to existing narrowband users, especially if adaptive interference suppression techniques are utilized in the spread spectrum receiver, Previous studies have defined the SNR improvement ratio which can be achieved for tone interferers and for narrowband interferers for which the center frequency of the interference is at the carrier frequency of the CDMA signal, In this paper the bit-error-rate (BER) performance of the mobile-to-base link of a CDMA system for a single narrowband user which occupies a significant portion of the CDMA bandwidth is evaluated, It is shown that the narrowband model used in previous studies does not apply in this case, especially for the large, effective, bandwidths which are characteristic of the interferers in the overlay system, The dependence of the BER on the filter order, the bandwidth of the interference, and its center frequency relative to the CDMA carrier frequency are defined, Additionally the increase in BER for a digital implementation of the adaptive suppression filter relative to the optimal Wiener filter is characterized with respect to the adaptive time constant and the quantization errors due to finite wordlength, It is shown that these implementation errors can be made negligible compared to the errors which are characteristic of the optimal Wiener filter, Analytic results are validated by simulation for typical system parameters, C1 USN,CTR CONTROL & OCEAN SURVEILLANCE,DIV RDT&E,SAN DIEGO,CA 92152. RP WEI, P (reprint author), UNIV CALIF SAN DIEGO,DEPT ELECT & COMP ENGN,LA JOLLA,CA 92093, USA. NR 19 TC 15 Z9 16 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 0733-8716 J9 IEEE J SEL AREA COMM JI IEEE J. Sel. Areas Commun. PD DEC PY 1994 VL 12 IS 9 BP 1510 EP 1523 DI 10.1109/49.339919 PG 14 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA QB380 UT WOS:A1994QB38000009 ER PT J AU WEIS, RS KERSEY, AD BERKOFF, TA AF WEIS, RS KERSEY, AD BERKOFF, TA TI A 4-ELEMENT FIBER GRATING SENSOR ARRAY WITH PHASE-SENSITIVE DETECTION SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article DE BRAGG GRATINGS; FIBER OPTIC SENSORS; STRAIN SENSORS ID WAVELENGTH-SHIFT DETECTION; STRAIN-SENSOR; SYSTEM; SCHEME AB A four-element, time-division multiplexed, fiber grating sensor array operating between the wavelengths of 1280 and 1310 nm was constructed and tested, The array consists of a 1300-nm edge-emitting LED that illuminates four gratings spaced five meters apart Each grating in the array reflects a spectrally narrow-band (0.3-0.5 nm) wavelength region. Measurand-induced changes In the grating period change the wavelength of the light reflected by each grating, The wavelength shifts are converted to phase changes by routing the reflected signal through a nearly path balanced fiber Mach Zehnder interferometer, The minimum detectable strain was measured to be as low as 2 nanostrain/root Hz for frequencies greater than 10 Hz. C1 TEXAS CHRISTIAN UNIV,DEPT ENGN,FT WORTH,TX 76129. SFA INC,LANDOVER,MD. RP WEIS, RS (reprint author), USN,RES LAB,OPT TECH BRANCH,CODE 5674,WASHINGTON,DC 20375, USA. NR 10 TC 68 Z9 83 U1 2 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD DEC PY 1994 VL 6 IS 12 BP 1469 EP 1472 DI 10.1109/68.392208 PG 4 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA QB709 UT WOS:A1994QB70900025 ER PT J AU STOYENKO, AD LAPLANTE, PA HARRISON, R MARLOWE, TJ AF STOYENKO, AD LAPLANTE, PA HARRISON, R MARLOWE, TJ TI DOUBLING THE ENGINEERS UTILITY SO IEEE SPECTRUM LA English DT Article C1 FAIRLEIGH DICKINSON UNIV,RUTHERFORD,NJ 07070. USN,CTR SURFACE WAREFARE,DAHLGREN DIV,WASHINGTON,DC 20350. SETON HALL UNIV,S ORANGE,NJ 07079. RP STOYENKO, AD (reprint author), NEW JERSEY INST TECHNOL,NEWARK,NJ 07102, USA. NR 0 TC 3 Z9 3 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 0018-9235 J9 IEEE SPECTRUM JI IEEE Spectr. PD DEC PY 1994 VL 31 IS 12 BP 32 EP 39 DI 10.1109/6.335817 PG 8 WC Engineering, Electrical & Electronic SC Engineering GA PV824 UT WOS:A1994PV82400015 ER PT J AU GAN, CH DELALAMO, JA BENNETT, BR MEYERSON, BS CRABBE, EF SODINI, CG REIF, LR AF GAN, CH DELALAMO, JA BENNETT, BR MEYERSON, BS CRABBE, EF SODINI, CG REIF, LR TI SI/SI1-XGEX VALENCE-BAND DISCONTINUITY MEASUREMENTS USING A SEMICONDUCTOR-INSULATOR-SEMICONDUCTOR (SIS) HETEROSTRUCTURE SO IEEE TRANSACTIONS ON ELECTRON DEVICES LA English DT Article ID HETEROJUNCTION BIPOLAR-TRANSISTORS; CHEMICAL VAPOR-DEPOSITION; STRAINED-LAYER HETEROSTRUCTURES; MISFIT DISLOCATIONS; ELECTRICAL CHARACTERIZATION; GE ALLOYS; SILICON; GAP; SPECTROSCOPY; OFFSETS AB We have measured the valence-band discontinuity of strained Si1-xGex on (100) unstrained Si using p-Si1-xGex/Si/p-Si(1-)xGe(x) semiconductor-insulator semiconductor (SIS) structures with Ge compositions in the range 10 < x < 25%. The epitaxial heterostructures were grown by ultra-h igh-vacuum chemical-vapor-deposition. A new data analysis procedure is proposed for extracting small Delta E(v) values out of the current-voltage characteristics of the SIS heterostructures as a function of temperature, Our data indicates that the valence band discontinuity between Si and Si1-xGex can be approximated by Delta E(v) = 6.4x meV for O < x < 17.5%. C1 MIT,CAMBRIDGE,MA 02139. USN,RES LAB,WASHINGTON,DC 20375. IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. RI Bennett, Brian/A-8850-2008; OI Bennett, Brian/0000-0002-2437-4213; del Alamo, Jesus/0000-0003-4003-7863 NR 45 TC 14 Z9 14 U1 0 U2 3 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 DEC PY 1994 VL 41 IS 12 BP 2430 EP 2439 DI 10.1109/16.337460 PG 10 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA PW501 UT WOS:A1994PW50100029 ER PT J AU SHIH, A YATER, J HOR, C ABRAMS, RH AF SHIH, A YATER, J HOR, C ABRAMS, RH TI SECONDARY-ELECTRON EMISSION PROPERTIES OF OXIDIZED BERYLLIUM CFA CATHODES SO IEEE TRANSACTIONS ON ELECTRON DEVICES LA English DT Article AB Heating an oxidized beryllium sample above 500 degrees C for eight hours or more establishes a stable surface composition that consists of about 35% carbon in carbide form, and Be and O in nearly one-to-one atomic ratio for the remainder. The secondary electron yield of this surface has a maximum yield, 6(max), of 2.8 +/- 0.1 at the primary electron energy of 420 +/- 20 eV. The secondary electron yield decreases slowly with increasing sample temperature. The energy of the emitted electrons is analyzed using a retarding potential method with the primary electron energy E(p) ranging from 10 to 1600 eV. For E(p) > 100 eV. Most of the emitted electrons are the true secondary electrons (i.e., those electrons with energy less than 50 eV). The energy distribution of the true secondary electrons shows little change in functional form for E, from 200 eV to 1600 eV, and for sample temperature from 20 degrees C to 530 degrees C. A small but steady change is observed in the narrowing of the peak width with increasing E(p) or increasing sample temperature. The current practice in processing the crossed-field amplifier (CFA) tube with an oxidized beryllium cathode includes a bakeout between 500 degrees C and 550 degrees C for several hours, The present study suggests that this heating is sufficient to convert the oxidized beryllium CFA cathode surface to the stable composition with the large secondary electron yield. Heating to a much higher temperature will not reduce the carbide content, but rather will reduce the oxygen content and consequently the secondary electron yield. RP SHIH, A (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 10 TC 13 Z9 13 U1 1 U2 3 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 DEC PY 1994 VL 41 IS 12 BP 2448 EP 2454 DI 10.1109/16.337462 PG 7 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA PW501 UT WOS:A1994PW50100031 ER PT J AU GOPALAKRISHNAN, GK BURNS, WK AF GOPALAKRISHNAN, GK BURNS, WK TI PERFORMANCE AND MODELING OF RESONANTLY ENHANCED LINBO3 MODULATORS FOR LOW-LOSS ANALOG FIBEROPTIC LINKS SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES LA English DT Article; Proceedings Paper CT 1994 International Microwave Symposium (IMS) and Microwave and Millimeter-Wave Circuits Symposium (MMWMCS) CY MAY 23-27, 1994 CL SAN DIEGO, CA SP IEEE ID GHZ; WAVELENGTH; BANDWIDTH; VOLTAGE AB The performance of resonantly enhanced LiNbO3 traveling wave optical modulators is investigated. High-frequency performance of broad band velocity matched LiNbO3 modulators with low half-wave voltages is shown to be relatively independent of termination. A resonant enhancement technique involving external line stretching of the length of the nonactive section of the modulator is proposed and demonstrated at low-frequencies. An accurate model is developed to facilitate design of resonantly enhanced optical modulators. RP GOPALAKRISHNAN, GK (reprint author), USN,RES LAB,MARYLAND ADV DEV LAB,CODE 5671,WASHINGTON,DC 20375, USA. NR 15 TC 11 Z9 11 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 0018-9480 J9 IEEE T MICROW THEORY JI IEEE Trans. Microw. Theory Tech. PD DEC PY 1994 VL 42 IS 12 BP 2650 EP 2656 DI 10.1109/22.339810 PN 2 PG 7 WC Engineering, Electrical & Electronic SC Engineering GA QA305 UT WOS:A1994QA30500048 ER PT J AU OLDMAN, TR FLEETWOOD, DM CHEEK, T MASSENGILL, L VANVONNO, N SHANEYFELT, MR EISEN, H BOESCH, HE SCHRIMPF, RD CAMPBELL, A BENDEKOVIC, J EMILY, D GRAWET, S MARSHALL, P BUCHNER, S GASIOT, J COSS, J KRULL, W FARREN, J FREDERICKSON, R LELIS, A AMRAM, A LENAHAN, P AF OLDMAN, TR FLEETWOOD, DM CHEEK, T MASSENGILL, L VANVONNO, N SHANEYFELT, MR EISEN, H BOESCH, HE SCHRIMPF, RD CAMPBELL, A BENDEKOVIC, J EMILY, D GRAWET, S MARSHALL, P BUCHNER, S GASIOT, J COSS, J KRULL, W FARREN, J FREDERICKSON, R LELIS, A AMRAM, A LENAHAN, P TI SUMMARY OF THE 1994 IEEE INTERNATIONAL NUCLEAR AND SPACE RADIATION EFFECTS CONFERENCE SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Editorial Material C1 SANDIA NATL LABS,LIVERMORE,CA 94550. TEXAS INSTRUMENTS INC,DALLAS,TX 75265. VANDERBILT UNIV,NASHVILLE,TN 37240. HARRIS SEMICOND INC,MELBOURNE,FL 32901. UNIV ARIZONA,TUCSON,AZ 85721. USN,RES LAB,WASHINGTON,DC 20375. UNIV MONTPELLIER 2,F-34095 MONTPELLIER,FRANCE. JET PROPULS LAB,PASADENA,CA. IBIS TECHNOL CORP,DANVERS,MA. UKAEA,HARWELL INSTRUMENTS,HARWELL,BERKS,ENGLAND. AEROSP CORP,LOS ANGELES,CA 90009. PENN STATE UNIV,UNIVERSITY PK,PA 16802. RP OLDMAN, TR (reprint author), USA,RES LAB,WASHINGTON,DC, USA. RI Schrimpf, Ronald/L-5549-2013 OI Schrimpf, Ronald/0000-0001-7419-2701 NR 0 TC 0 Z9 0 U1 1 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 1804 EP 1807 PN 1 PG 4 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700001 ER PT J AU FREITAG, RK BROWN, DB DOZIER, CM AF FREITAG, RK BROWN, DB DOZIER, CM TI EVIDENCE FOR 2 TYPES OF RADIATION-INDUCED TRAPPED POSITIVE CHARGE SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID OXIDE-SEMICONDUCTOR CAPACITORS; GENERATION; DEVICES AB New experimental evidence is presented that supports a model that assumes two distinguishable types of positive oxide charge following, x-irradiation. Two new experiments have been performed designed to separate the annealing properties of the two types of trapped positive charge. It is found that one type of trapped positive charge can be permanently removed at room temperature using substrate hot electron injection. The second type of trapped positive charge is found to be stable at temperatures up to 160 degrees C RP FREITAG, RK (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 18 TC 25 Z9 25 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 1828 EP 1834 DI 10.1109/23.340514 PN 1 PG 7 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700004 ER PT J AU STAHLBUSH, RE CARTIER, E AF STAHLBUSH, RE CARTIER, E TI INTERFACE DEFECT FORMATION IN MOSFETS BY ATOMIC-HYDROGEN EXPOSURE SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID SI/SIO2 INTERFACE; SILICON; ELECTRONS AB The formation of interface defects that occurs when atomic hydrogen, H degrees, is introduced into the gate oxide of MOSFETs at room temperature has been studied. MOSFETs with the edges of the gate oxide at the source and drain exposed to the ambient were placed downstream of a hydrogen plasma. Baffles prevent UV light from the plasma from reaching the device. The effective channel lengths ranged from 0.9 to 5 mu m. For comparison, bare thermal oxides were exposed at the same time. The interface state density in the MOSFETs was measured by charge pumping and in the bare oxide by high-low capacitance-voltage measured with a Hg probe. We observe that the induced damage has the same energy distribution of interface traps in both types of samples. This distribution is very similar to that produced by irradiation or hot electron stressing. It is characterized by a broad peak at 0.7 eV above the valence band. A charge pumping analysis has been developed to measure interface states as a function of position above the MOSFET source and drain regions. The degradation decreases exponentially from the point of H degrees entry at the gate edges near the source and drain. This demonstrates that the hydrogen enters the gate oxide of the MOSFET at the channel edges. Furthermore, the decay length is constant within the experimental uncertainty over three orders of magnitude of H degrees dose and two orders of magnitude of interface trap density. The exponential decrease of defect generation with increasing lateral diffusion distance is in contrast to the weaker oxide thickness dependence of the defect generation rate observed by Cartier et al.[J. Non-Cryst. Sol., in press]. These results indicate that defects such as Si-H bonds at the Si/SiO2, interfaces act as catalysts for H-2 formation by reactions such as Si- + H degrees --> SiH, SiH + H degrees --> Si- + H-2. Furthermore, the number of these sites is not changed by the H degrees exposure. C1 IBM CORP, THOMAS J WATSON RES CTR, YORKTOWN HTS, NY 10598 USA. RP STAHLBUSH, RE (reprint author), USN, RES LAB, WASHINGTON, DC 20375 USA. NR 26 TC 23 Z9 23 U1 1 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 0018-9499 EI 1558-1578 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 1844 EP 1853 DI 10.1109/23.340516 PN 1 PG 10 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700006 ER PT J AU SAKS, NS SIMONS, M FLEETWOOD, DM YOUNT, JT LENAHAN, PM KLEIN, RB AF SAKS, NS SIMONS, M FLEETWOOD, DM YOUNT, JT LENAHAN, PM KLEIN, RB TI RADIATION EFFECTS IN OXYNITRIDES GROWN IN N2O SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID INTERFACIAL NITROGEN; NITRIDED OXIDES; SIO2; FIELD; BREAKDOWN; MOSFETS; CHARGE; HARD AB Oxynitrides have been grown by oxidation in N2O in a standard thermal oxidation furnace. Two N2O processes have been studied: oxidation in N2O only, and two-step oxidation with initial oxidation in O-2 followed by oxidation/nitridation in N2O. Results are presented for radiation damage at 80 and 295K, hole trapping, interface trap creation, electron spin resonance, and hole de-trapping using thermally-stimulated current analysis. N2O oxynitrides do not appear to have the well-known. drawbacks of NH3-annealed oxynitrides. Creation of interface traps during irradiation is reduced in the N2O oxynitrides, with the degree of improvement depending on the fabrication process. C1 RES TRIANGLE INST,RES TRIANGLE PK,NC 27709. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. PENN STATE UNIV,UNIVERSITY PK,PA 16802. SFA INC,LANDOVER,MD 20785. RP SAKS, NS (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 31 TC 20 Z9 20 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 1854 EP 1863 DI 10.1109/23.340517 PN 1 PG 10 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700007 ER PT J AU KOSIER, SL COMBS, WE WEI, A SCHRIMPF, RD FLEETWOOD, DM DELAUS, M PEASE, RL AF KOSIER, SL COMBS, WE WEI, A SCHRIMPF, RD FLEETWOOD, DM DELAUS, M PEASE, RL TI BOUNDING THE TOTAL-DOSE RESPONSE OF MODERN BIPOLAR-TRANSISTORS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE AB The excess base current in an irradiated BJT increases superlinearly with total dose at low-total-dose levels. In this regime, the excess base current depends on the particular charge-trapping properties of the oxide that covers the emitter-base junction. The device response is dose-rate-, irradiation-bias-, and technology-dependent in this regime. However, once a critical amount of charge has accumulated in the oxide, the excess base current saturates at a value that is independent of how the charge accumulated. This saturated excess base current depends on the device layout, bulk lifetime in the base region, and the measurement bias. In addition to providing important insight into the physics of bipolar-transistor total-dose response, these results have significant circuit-level implications. For example, in some circuits, the transistor gain that corresponds to the saturated excess base current is sufficient to allow reliable circuit operation. For cases in which the saturated value of current gain is acceptable, and where other circuit elements permit such over-testing, this can greatly simplify hardness assurance for space applications. C1 UNIV ARIZONA,DEPT ECE,TUCSON,AZ 85721. USN,SURFACE WARFARE CTR CRANE,CRANE,IN 47522. ANALOG DEVICES INC,WILMINGTON,MA 01887. RLP RES,ALBUQUERQUE,NM 87122. RI Schrimpf, Ronald/L-5549-2013 OI Schrimpf, Ronald/0000-0001-7419-2701 NR 15 TC 53 Z9 53 U1 1 U2 7 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 1864 EP 1870 DI 10.1109/23.340518 PN 1 PG 7 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700008 ER PT J AU FLEETWOOD, DM KOSIER, SL NOWLIN, RN SCHRIMPF, RD REBER, RA DELAUS, M WINOKUR, PS WEI, A COMBS, WE PEASE, RL AF FLEETWOOD, DM KOSIER, SL NOWLIN, RN SCHRIMPF, RD REBER, RA DELAUS, M WINOKUR, PS WEI, A COMBS, WE PEASE, RL TI PHYSICAL-MECHANISMS CONTRIBUTING TO ENHANCED BIPOLAR GAIN DEGRADATION AT LOW-DOSE RATES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID OXIDE-SEMICONDUCTOR DEVICES; X-RAY; MOS DEVICES; CO-60 IRRADIATIONS; RADIATION RESPONSE; BORDER TRAPS; CHARGE; SIO2; TRANSISTORS; TEMPERATURE AB We have performed capacitance-voltage (C-V) and thermally-stimulated-current (TSC) measurements on non-radiation-hard MOS capacitors simulating screen oxides of modern bipolar technologies. For 0-V irradiation at similar to 25 degrees C, the net trapped-positive-charge density (N-ox) inferred from midgap C-V shifts is similar to 25-40% greater for low-dose-rate (< 10 rad(SiO2)/s) than for high-dose-rate (> 100 rad(SiO2)/s) exposure. Device modeling shows that such a difference in screen-oxide N-ox is enough to account for the enhanced low-rate gain degradation often observed in bipolar devices, due to the similar to exp (N-ox(2)) dependence of the excess base current. At the higher rates, TSC measurements reveal a similar to 10% decrease in trapped-hole density over low rates. Also, at high rates, up to similar to 2.5-times as many trapped holes are compensated by electrons in border traps than at low rates for these devices and irradiation conditions. Both the reduction in trapped-hole density and increased charge compensation reduce the high-rate midgap shift. A physical model is developed which suggests that both effects are caused by time-dependent space charge in the bulk of these soft oxides associated with slowly transporting and/or metastably trapped holes (e. g., in E(delta)' centers). On the basis of this model, bipolar transistors and screen-oxide capacitors were irradiated at 60 degrees C at 200 rad(SiO2)/s in a successful effort to match low-rate damage. These surprising results provide insight into enhanced low-rate bipolar gain degradation and suggest potentially promising new approaches to bipolar and BICMOS hardness assurance for space applications. C1 UNIV ARIZONA,DEPT ECE,TUCSON,AZ 85721. PHILLIPS LAB,VTE,ALBUQUERQUE,NM 87185. ANALOG DEVICES INC,WILMINGTON,MA 01887. USN,CTR SURFACE WARFARE,CRANE,IN 47522. RLP RES INC,ALBUQUERQUE,NM 87122. RP FLEETWOOD, DM (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. RI Schrimpf, Ronald/L-5549-2013 OI Schrimpf, Ronald/0000-0001-7419-2701 NR 54 TC 157 Z9 198 U1 3 U2 11 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 1871 EP 1883 DI 10.1109/23.340519 PN 1 PG 13 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700009 ER PT J AU XAPSOS, MA SUMMERS, GP BLATCHLEY, CC COLERICO, CW BURKE, EA MESSENGER, SR SHAPIRO, P AF XAPSOS, MA SUMMERS, GP BLATCHLEY, CC COLERICO, CW BURKE, EA MESSENGER, SR SHAPIRO, P TI CO-60 GAMMA-RAY AND ELECTRON DISPLACEMENT DAMAGE STUDIES OF SEMICONDUCTORS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE AB A general method for relating Co-60 gamma ray and monoenergetic electron beam displacement damage is presented. The approach is based on the concept of effective ''displacement damage dose'', which is analogous to ideas used to study ionizing radiation effects. The response to electron damage of p-type gallium arsenide and indium phosphide solar cells, as previously reported for p-type silicon solar cells, is proportional to the square of the nonionizing energy loss. C1 UNIV MARYLAND,DEPT PHYS,BALTIMORE,MD 21228. SPIRE CORP,BEDFORD,MA 01730. SFA INC,LANDOVER,MD 20785. RP XAPSOS, MA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 16 TC 29 Z9 29 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 1945 EP 1949 DI 10.1109/23.340528 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700018 ER PT J AU MARSHALL, PW DALE, CJ CARTS, MA LABEL, KA AF MARSHALL, PW DALE, CJ CARTS, MA LABEL, KA TI PARTICLE-INDUCED BIT ERRORS IN HIGH-PERFORMANCE FIBER OPTIC DATA LINKS FOR SATELLITE DATA MANAGEMENT SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE AB Experimental test methods and analysis tools are demonstrated to assess particle-induced bit errors on fiber optic link receivers for satellites. Susceptibility to direct ionization from low LET particles is quantified by analyzing proton and helium ion data as a function of particle LET. Existing single event analysis approaches are shown to apply, with appropriate modifications, to the regime of temporally (rather than spatially) distributed bits, even though the sensitivity to single events exceeds conventional memory technologies by orders of magnitude. The cross-section LET dependence follows a Weibull distribution at data rates from 200 to 1000 Mbps and at various incident optical power levels. The LET threshold for errors is shown, through both experiment and modeling, to be 0 in all cases! The error cross-section exhibits a strong inverse dependence on received optical power in the LET range where most orbital single events would occur, thus indicating that errors can be minimized by operating links with higher incident optical power. Also, an analytic model is described which incorporates the appropriate physical characteristics of the link as well as the optical and receiver electrical characteristics. Results indicate appropriate steps to assure suitable link performance even in severe particle orbits. C1 SFA INC,LANDOVER,MD 20785. NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RP MARSHALL, PW (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 10 TC 71 Z9 76 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 1958 EP 1965 DI 10.1109/23.340530 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700020 ER PT J AU DALE, CJ CHEN, L MCNULTY, PJ MARSHALL, PW BURKE, EA AF DALE, CJ CHEN, L MCNULTY, PJ MARSHALL, PW BURKE, EA TI A COMPARISON OF MONTE-CARLO AND ANALYTIC TREATMENTS OF DISPLACEMENT DAMAGE IN SI MICROVOLUMES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID ENERGY-DEPENDENCE; SILICON; EXTREMES; NUCLEAR; PROTONS AB In this paper, we compare Monte Carlo and analytic calculations of displacement damage resulting from inelastic proton reactions in Si. These comparisons include the nonionizing energy loss rate, the mean recoil damage energy spectra, and their associated variance. In the limit of bulk material, both approaches are in good agreement. sensitive volumes shrink and incident proton energies increase, the ranges of the spallation recoil fragments approach the smallest dimension of the microvolume, and the pixel-to-pixel damage variance increases rapidly. In this regime, a Monte Carlo approach is used to describe the damage energy distribution. Indeed, we show that such simulations predict the 63 MeV proton-induced dark current histograms more accurately than present analytic methods. The Monte Carlo code is also used to explore ground test fidelity issues for devices with small sensitive volumes. C1 CLEMSON UNIV,CLEMSON,SC 29634. SFA INC,LANDOVER,MD 20785. RP DALE, CJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 26 TC 47 Z9 49 U1 0 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 1974 EP 1983 DI 10.1109/23.340532 PN 1 PG 10 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700022 ER PT J AU LABEL, KA HAWKINS, DK COOLEY, JA SEIDLECK, CM MARSHALL, P DALE, C GATES, MM KIM, HS STASSINOPOULOS, EG AF LABEL, KA HAWKINS, DK COOLEY, JA SEIDLECK, CM MARSHALL, P DALE, C GATES, MM KIM, HS STASSINOPOULOS, EG TI SINGLE EVENT EFFECT GROUND TEST-RESULTS FOR A FIBER OPTIC DATA INTERCONNECT AND ASSOCIATED ELECTRONICS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE AB As spacecraft unlock the potential of fiber optics for spaceflight applications, system level bit error rates become of concern to the system designer. We present ground test data and analysis on candidate system components. C1 NRL,SFA,WASHINGTON,DC. NASA,GODDARD SPACE FLIGHT CTR,JACKSON & TULL,GREENBELT,MD 20771. RP LABEL, KA (reprint author), NASA,GODDARD SPACE FLIGHT CTR,HUGHES ST SYST CORP,CODE 7351,GREENBELT,MD 20771, USA. NR 11 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 1999 EP 2004 DI 10.1109/23.340535 PN 1 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700025 ER PT J AU DUSSAULT, H HOWARD, JW BLOCK, RC PINTO, MR STAPOR, WJ KNUDSON, AR AF DUSSAULT, H HOWARD, JW BLOCK, RC PINTO, MR STAPOR, WJ KNUDSON, AR TI HIGH-ENERGY HEAVY-ION-INDUCED SINGLE EVENT TRANSIENTS IN EPITAXIAL STRUCTURES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID CHARGE COLLECTION; CMOS LATCHUP; MODEL AB This paper describes numerical and experimental heavy-ion charge collection studies using P+N junctions on epitaxial layers. The numerical simulations provide insights into the basic mechanisms contributing to transient currents and charge collection in devices on epitaxial layers. This paper also presents charge collection data from similar to 2 GeV I-127 ions incident upon P+N junctions on both bulk silicon and epitaxial layers and compares the experimental data with the simulation results. The experimental data show that charge deposited below the epitaxial layer can be collected. This work is unique and important because this GeV-energy-range I-127 ion more nearly represents a cosmic ray compared to lower energy, heavy-ions in the hundreds of MeV energy range. This paper also discusses the simulation results with respect to the experimental data and charge collection models for epitaxial transistors. Additionally, a shunting model is proposed to model the early transient current responses. C1 ROME LAB,ERDA,GRIFFISS AFB,NY 13441. AT&T BELL LABS,MURRAY HILL,NJ 07974. USN,RES LAB,WASHINGTON,DC 20375. SACHS FREEMAN ASSOCIATES INC,LANDOVER,MD 20785. RP DUSSAULT, H (reprint author), RENSSELAER POLYTECH INST,DEPT NUCL ENGN & ENGN PHYS,TROY,NY 12180, USA. NR 19 TC 28 Z9 30 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2018 EP 2025 DI 10.1109/23.340537 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700027 ER PT J AU MCMORROW, D MELINGER, JS THANTU, N CAMPBELL, AB WEATHERFORD, TR KNUDSON, AR TRAN, LH PECZALSKI, A AF MCMORROW, D MELINGER, JS THANTU, N CAMPBELL, AB WEATHERFORD, TR KNUDSON, AR TRAN, LH PECZALSKI, A TI CHARGE COLLECTION MECHANISMS OF HETEROSTRUCTURE FETS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID GAAS-MESFETS AB Ion- and laser-induced charge-collection transients measured for AlGaAs/InGaAs heterostructure insulated-gate field-effect transistors (HIGFETs) reveal evidence for two mechanisms of enhanced charge collection: a channel-modulation mechanism that dominates the charge-collection processes at positive gate biases and can persist for several nanoseconds; and a parasitic bipolar transistor mechanism that shows a sensitive dependence on the density of free carriers injected into the device, and is complete within a few hundred picoseconds. The results reinforce the utility of the laser technique for investigating the charge-collection mechanisms of semiconductor devices. C1 SFA INC,LANDOVER,MD 20785. HONEYWELL INC,BLOOMINGTON,MN 55420. RP MCMORROW, D (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 13 TC 40 Z9 40 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2055 EP 2062 DI 10.1109/23.340542 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700032 ER PT J AU HOWARD, JW BLOCK, RC DUSSAULT, H STAPOR, WJ MCDONALD, PT KNUDSON, AR PINTO, MR AF HOWARD, JW BLOCK, RC DUSSAULT, H STAPOR, WJ MCDONALD, PT KNUDSON, AR PINTO, MR TI A NOVEL-APPROACH FOR MEASURING THE RADIAL-DISTRIBUTION OF CHARGE IN A HEAVY-ION TRACK SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE AB We describe the design and uses of possible semiconductor test structures for measuring the initial radial distribution of charge and subsequent charge transport in a high energy, heavy-ion track. Numerical simulations show how the test structure can resolve different radial distributions of charge within an ion track. The test structure simulations also show the importance of accurately representing ion track structure in single event effects simulations. C1 ROME LAB,ERDA,GRIFFISS AFB,NY. USN,RES LAB,WASHINGTON,DC 20375. AT&T BELL LABS,MURRAY HILL,NJ 07974. RP HOWARD, JW (reprint author), RENSSELAER POLYTECH INST,DEPT NUCL ENGN & ENGN PHYS,TROY,NY, USA. NR 10 TC 9 Z9 9 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2077 EP 2084 DI 10.1109/23.340545 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700035 ER PT J AU WHEATLEY, CF TITUS, JL BURTON, DI AF WHEATLEY, CF TITUS, JL BURTON, DI TI SINGLE-EVENT GATE RUPTURE IN VERTICAL POWER MOSFETS - AN ORIGINAL EMPIRICAL EXPRESSION SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE AB For the first time, an empirical expression is derived that describes the susceptibility of a power double-diffused metal-oxide semiconductor (DMOS) field-effect transistor (FET) to single-event gate rupture (SEGR) induced by the interaction of mono-energetic ions with regions of the n-epi, gate oxide, and polysilicon gate. Using this expression, the failure threshold voltages for the gate and drain can be analytically determined for any particular value of energy deposition along the ion's path or more commonly described as the ion's linear energy transfer (LET) function. This paper delineates our research, an in-depth study of vertical power DMOS transistors, having a 50-nm gate oxide and a strong SEGR response, subjected to various monoenergetic ions, representing particular values of LET between 0 and 83 MeV.cm(2) mg(-1). A description of the devices characterized, the test setup and test methodology employed, the failure threshold voltages measured, and the analysis techniques used are all summarized. Finally, an empirical equation is presented that portrays the locus of SEGR in the {-V-GS, V-DS} plane for all values of LET. C1 USN,CTR SURFACE WARFARE,CRANE,IN 47522. HARRIS SEMICOND INC,MOUTAINTOP,PA 18707. NR 13 TC 45 Z9 47 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2152 EP 2159 DI 10.1109/23.340556 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700046 ER PT J AU TURFLINGER, TL DAVEY, MV MAPPES, BM AF TURFLINGER, TL DAVEY, MV MAPPES, BM TI SINGLE EVENT EFFECTS IN ANALOG-TO-DIGITAL CONVERTERS - DEVICE PERFORMANCE AND SYSTEM IMPACT SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE AB Monolithic Analog-to-Digital Converters (ADCs) exhibit a large error rate in the single event effects (SEE) environment. Analysis of data from a high-performance ADC demonstrates the type of errors and their potential impact on system performance. RP TURFLINGER, TL (reprint author), USN,CTR SURFACE WARFARE,CRANE,IN 47522, USA. NR 5 TC 11 Z9 11 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2187 EP 2194 DI 10.1109/23.340561 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700051 ER PT J AU BUCHNER, S LANGWORTHY, JB STAPOR, WJ CAMPBELL, AB RIVET, S AF BUCHNER, S LANGWORTHY, JB STAPOR, WJ CAMPBELL, AB RIVET, S TI IMPLICATIONS OF THE SPATIAL DEPENDENCE OF THE SINGLE-EVENT-UPSET THRESHOLD IN SRAMS MEASURED WITH A PULSED-LASER SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID SEU AB Pulsed laser light was used to measure single event upset (SEU) thresholds for a large number of memory cells in both CMOS and bipolar SRAMs. Results showed that small variations in intercell upset threshold could not explain the gradual rise in the curve of cross section versus linear energy transfer (LET). The memory cells exhibited greater intracell variations implying that the charge collection efficiency within a memory cell varies spatially and contributes substantially to the shape of the curve of cross section versus LET. The results also suggest that the pulsed laser can be used for hardness-assurance measurements on devices with sensitive areas larger than the diameter of the laser beam. C1 USN,RES LAB,WASHINGTON,DC 20375. HARRIS SEMICOND INC,SCHAUMBURG,IL 60173. NR 14 TC 15 Z9 15 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2195 EP 2202 DI 10.1109/23.340562 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700052 ER PT J AU FOUTS, DJ WEATHERFORD, T MCMORROW, D MELINGER, JS CAMPBELL, AB AF FOUTS, DJ WEATHERFORD, T MCMORROW, D MELINGER, JS CAMPBELL, AB TI SINGLE EVENT UPSETS IN GALLIUM-ARSENIDE DYNAMIC LOGIC SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID CHARGE-COLLECTION; GAAS-MESFETS AB The advantages and disadvantages of using gallium arsenide (GaAs) dynamic logic in computers and digital systems are briefly discussed, especially with respect to space applications. A short introduction to the topology and operation of GaAs Two-Phase Dynamic FET Logic (TDFL) circuits is presented. Experiments for testing the SEU sensitivity of GaAs TDFL, using a laser to create charge collection events, are described. Results are used to estimate the heavy-ion, soft error rate for TDFL in a spacecraft in geosynchronous orbit, and the dependence of the SEU sensitivity on clock frequency, clock voltage, and clock phase. Analysis of the data includes a comparison between the SEU sensitivities of TDFL and the more common static form of GaAs logic, Directly Coupled FET Logic (DCFL). This is the first reported SEU testing of GaAs dynamic logic. C1 SFA INC, LANDOVER, MD 20785 USA. USN, RES LAB, WASHINGTON, DC 20375 USA. RP USN, POSTGRAD SCH, DEPT ECE, MONTEREY, CA USA. NR 18 TC 4 Z9 4 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 0018-9499 EI 1558-1578 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2244 EP 2251 DI 10.1109/23.340571 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700060 ER PT J AU MRSTIK, BJ MCMARR, PJ LAWRENCE, RK HUGHES, HL AF MRSTIK, BJ MCMARR, PJ LAWRENCE, RK HUGHES, HL TI THE USE OF SPECTROSCOPIC ELLIPSOMETRY TO PREDICT THE RADIATION RESPONSE OF SIMOX SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID BURIED OXIDES AB We have studied SIMOX (Separation by Implantation of Oxygen) material using spectroscopic ellipsometry to determine the structure of the buried oxide and C-V measurements to determine the radiation response of the buried oxide. Our ellipsometric measurements indicate that the buried oxide is best described as a layer of stoichiometric SiO2 which is more dense than bulk vitreous (v-) SiO2. We also find that the radiation response of the buried oxide is determined primarily by its density. We also find that small variations in the conditions used to prepare the SIMOX wafer can significantly affect the oxide density and its radiation response. The density of the buried oxide is also found to affect how it etches. C1 SFA INC,LANDOVER,MD 20785. SFA,ARACOR,WASHINGTON,DC 20375. RP MRSTIK, BJ (reprint author), USN,RES LAB,CODE 6816,WASHINGTON,DC 20375, USA. NR 19 TC 12 Z9 12 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2277 EP 2283 DI 10.1109/23.340576 PN 1 PG 7 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700065 ER PT J AU ZVANUT, ME BENEFIELD, C HUGHES, HL AF ZVANUT, ME BENEFIELD, C HUGHES, HL TI EFFECT OF SUPPLEMENTAL O-IMPLANTATION ON THE RADIATION-INDUCED HOLE TRAPS IN SIMOX BURIED OXIDES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID ELECTRON; SILICON; SIO2; CENTERS; CHARGE; OXYGEN AB We describe electrical and spectroscopic measurements of SIMOX subjected to supplemental oxygen implantation and standard 1000 degrees C post implantation annealing. Point contact transistor measurements indicate that the supplemental oxygen implantation creates a net increase in radiation-induced trapped charge, and, surprisingly, electron paramagnetic resonance studies show that the O vacancy concentration increases. The electron paramagnetic resonance results suggest that the radiation tolerance of the supplemental oxides is due to insufficiently annealed implantation damage. A higher post supplemental anneal temperature minimizes the radiation-induced trapped charge; but further studies are necessary to assess the total impact of the high temperature anneal. C1 USN,RES LAB,WASHINGTON,DC 20375. ARACOR,WASHINGTON,DC. RP ZVANUT, ME (reprint author), UNIV ALABAMA,BIRMINGHAM,AL 35294, USA. NR 22 TC 3 Z9 3 U1 2 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2284 EP 2290 DI 10.1109/23.340577 PN 1 PG 7 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700066 ER PT J AU JENKINS, WC LIU, ST AF JENKINS, WC LIU, ST TI RADIATION RESPONSE OF FULLY-DEPLETED MOS-TRANSISTORS FABRICATED IN SIMOX SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID MOSFETS AB The total dose radiation response of radiation-resistant fully-depleted submicron n-MOS and p-MOS transistors fabricated in SIMOX is presented. The total ionizing dose radiation induced threshold voltage shifts under three different irradiation bias conditions, including the worst case (pass-gate) bias for n-MOS transistors are discussed. Total dose hard fully-depleted p-MOS transistors are experimentally demonstrated. The larger threshold voltage shifts of fully-depleted n-MOS transistors as compared to partially-depleted n-MOS transistors in an ionizing radiation environment are explained by a model coupling the radiation induced buried oxide charge to the top transistor. C1 HONEYWELL SOLID STATE ELECTR CTR,PLYMOUTH,MN 55441. RP JENKINS, WC (reprint author), USN,RES LAB,CODE 6816,WASHINGTON,DC 20375, USA. NR 13 TC 24 Z9 28 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2317 EP 2321 DI 10.1109/23.340582 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700071 ER PT J AU PEASE, RL KOSIER, SL SCHRIMPF, RD COMBS, WE DAVEY, M DELAUS, M FLEETWOOD, DM AF PEASE, RL KOSIER, SL SCHRIMPF, RD COMBS, WE DAVEY, M DELAUS, M FLEETWOOD, DM TI COMPARISON OF HOT-CARRIER AND RADIATION-INDUCED INCREASES IN BASE CURRENT IN BIPOLAR-TRANSISTORS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID DEVICES AB A comparison was made between hot-carrier-stress induced and ionizing-radiation induced increases in the base current of bipolar linear microcircuit transistors from two process technologies. The comparison was made on the basis of a failure stress in seconds and a failure dose in rad(SiO2) for a failure criterion of Delta I-B = 2 nA measured at an I-C of 1 mu A and V-CE of 5 V. Comparisons were made for several die on a single wafer, die from different wafers in a process lot, and die from split lots with various base oxide (also called spacer or screen oxide) hardening techniques applied. For each of these cases no correlation was found between stress-induced failure and ionizing-radiation induced failure. This result is consistent with modeling that shows different mechanisms for the degradation from hot-carriers and ionization. Hot-carrier stress induced damage is dominated by interface traps near the emitter-base junction periphery; whereas, ionizing-radiation induced damage is dominated by trapped positive charge in the base oxide over the extrinsic-base region. C1 UNIV ARIZONA,TUCSON,AZ. USN,CTR SURFACE WARFARE,CRANE,IN. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP PEASE, RL (reprint author), RLP RES,ALBUQUERQUE,NM, USA. RI Schrimpf, Ronald/L-5549-2013 OI Schrimpf, Ronald/0000-0001-7419-2701 NR 16 TC 3 Z9 3 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2567 EP 2573 DI 10.1109/23.340617 PN 1 PG 7 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700106 ER PT J AU MELINGER, JS BUCHNER, S MCMORROW, D STAPOR, WJ WEATHERFORD, TR CAMPBELL, AB AF MELINGER, JS BUCHNER, S MCMORROW, D STAPOR, WJ WEATHERFORD, TR CAMPBELL, AB TI CRITICAL-EVALUATION OF THE PULSED-LASER METHOD FOR SINGLE EVENT EFFECTS TESTING AND FUNDAMENTAL-STUDIES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1994 IEEE Annual Conference on Nuclear and Space Radiation Effects (NSREC 94) CY JUL 18-22, 1994 CL TUCSON, AZ SP IEEE ID INDUCED CHARGE COLLECTION; GAAS-MESFETS; SEU AB In this paper we present an evaluation of the pulsed laser as a technique for single events effects (SEE) testing. We explore in detail the important optical effects, such as laser beam propagation, surface reflection, and linear and nonlinear absorption, which determine the nature of laser-generated charge tracks in semiconductor materials. While there are differences in the structure of laser- and ion-generated charge tracks, we show that in many cases the pulsed laser remains an invaluable tool for SEE testing. Indeed, for several SEE applications, we show that the pulsed laser method represents a more practical approach than conventional accelerator-based methods. C1 USA,RES LAB,ADELPHI,MD 20783. RP MELINGER, JS (reprint author), USN,RES LAB,CODE 6613,WASHINGTON,DC 20375, USA. NR 26 TC 136 Z9 147 U1 1 U2 8 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1994 VL 41 IS 6 BP 2574 EP 2584 DI 10.1109/23.340618 PN 1 PG 11 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA PZ157 UT WOS:A1994PZ15700107 ER PT J AU KOPLOWITZ, J GRECO, V AF KOPLOWITZ, J GRECO, V TI ON TBE EDGE LOCATION ERROR FOR LOCAL MAXIMUM AND ZERO-CROSSING EDGE DETECTORS SO IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE LA English DT Letter DE EDGE DETECTION; FEATURE EXTRACTION; IMAGE PROCESSING; IMAGE SEGMENTATION; LOCALIZATION CRITERION AB We examine the localization criterion for edge detection and determine the probability density function describing the edge location error. Canny defines the measure of localization as the reciprocal or the Foot-mean-square edge location error and formulates an expression of this measure For local maximum detectors. However, Tagare and deFigueiredo point out that an incorrect assumption is made in the calculation. The same procedure is used by Sarkar and Boyer for their localization measure for zero-crossing detectors. We modify the analysis and obtain a closed form solution of the probability density function of the edge location error. Examination of the density function indicates the variance of the edge location error does not exist, and hence can not be used directly as a measure of localization. C1 USN,NAVAL UNDERSEA WARFARE,NEWPORT,RI 02841. RP KOPLOWITZ, J (reprint author), CLARKSON UNIV,DEPT ELECT & COMP ENGN,POTSDAM,NY 13699, USA. NR 16 TC 32 Z9 35 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 0162-8828 J9 IEEE T PATTERN ANAL JI IEEE Trans. Pattern Anal. Mach. Intell. PD DEC PY 1994 VL 16 IS 12 BP 1207 EP 1212 DI 10.1109/34.387487 PG 6 WC Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic SC Computer Science; Engineering GA QA715 UT WOS:A1994QA71500005 ER PT J AU GOODMAN, IR AF GOODMAN, IR TI TOWARD A COMPREHENSIVE THEORY OF LINGUISTIC AND PROBABILISTIC EVIDENCE - 2 NEW APPROACHES TO CONDITIONAL EVENT ALGEBRA SO IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS LA English DT Article AB This paper first surveys the basic state-of-the art in modeling and combining conditional information, compatible with natural conditional probability evaluations via conditional event algebras. A critical analysis of the situation is given, where current approaches are based upon interpreting conditional events as event intervals. This includes the present problems of modeling conditional random variables, higher order conditionals, and the general incompatibility of these conditional event algebras with the traditional numerically-oriented approach using conditional likelihoods for the independent source case. To address these issues, two new approaches to conditioning are presented here. The first is based upon extending the usual arithmetic division operation to the case of zero denominators and is shown to lead to positive results for the above-mentioned higher order conditioning problem, as well as to a natural way to define fuzzy conditional sets. The second new approach is based upon a joint countable product space representation and not only leads to solutions to all three above problems, but also leads to reasonable definitions of fuzzy conditional sets. One drawback of this approach, however, is the increased computational complexity entailed in its implementation. This issue is also addressed in part. Finally, the techniques are shown to yield a more comprehensive way of dealing with either, or both, linguistic-based evidence and stochastic evidence. RP GOODMAN, IR (reprint author), USN,NCCOSC,RDTE,DIV,CODE 4221,SAN DIEGO,CA 92152, USA. NR 37 TC 15 Z9 18 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 0018-9472 J9 IEEE T SYST MAN CYB JI IEEE Trans. Syst. Man Cybern. PD DEC PY 1994 VL 24 IS 12 BP 1685 EP 1698 DI 10.1109/21.328926 PG 14 WC Computer Science, Cybernetics; Engineering, Electrical & Electronic SC Computer Science; Engineering GA PR112 UT WOS:A1994PR11200004 ER PT J AU BAMBER, D AF BAMBER, D TI PROBABILISTIC ENTAILMENT OF CONDITIONALS BY CONDITIONALS SO IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS LA English DT Article ID LOGIC AB Symbolic logics that embody different theories of natural-language conditionals (e.g., statements of the form If alpha, then beta) have been developed. One such logic is that of Ernest Adams. Regardless of whether Adams' theory of natural-language conditionals is correct, Adams' logic is useful. An Adams conditional alpha > beta expresses the idea that the conditional probability Pr(beta\alpha) is close to one; his logic may be used to reason about such ideas. In particular, Adam's logic may be used to reason about imperfect generalizations such as Nearly every alpha is a beta, provided that such a statement is taken to mean that the conditional probability that a randomly selected object is a beta-given that it is an alpha-is close to one. In Adams' logic, a finite set of premises {phi(1) > psi(1),...,phi(n) > psi(n)} is said to probabilistically entail a finite set of alternative conclusions {eta(1) > mu(1),...,eta(m) > mu(m)} iff(i.e., if and only if), roughly speaking, whenever the conditional probabilities Pr(psi(1)\phi(1)),...,Pr(psi(n)\phi(n)) are all close to one, at least one of the conditional probabilities Pr(mu(1) \ eta(1)),...,Pr(mu(m)\eta(m)) will also be close to one. Adams has developed a test for ascertaining whether a set of premises probabilistically entails a set of alternative conclusions. However, his test is computationally intensive. A new, more efficient test is presented in the first half of this paper. The second half (an appendix) proves that the new test is valid; this appendix can be safely skipped by readers uninterested in proofs. RP BAMBER, D (reprint author), USN,NCCOSC,RDTE,DIV 44209,CTR CONTROL & OCEAN SURVEILLANCE,NAVAL COMMAND,SAN DIEGO,CA 92152, USA. NR 11 TC 6 Z9 6 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 0018-9472 J9 IEEE T SYST MAN CYB JI IEEE Trans. Syst. Man Cybern. PD DEC PY 1994 VL 24 IS 12 BP 1714 EP 1723 DI 10.1109/21.328929 PG 10 WC Computer Science, Cybernetics; Engineering, Electrical & Electronic SC Computer Science; Engineering GA PR112 UT WOS:A1994PR11200007 ER PT J AU KIRSHENBAUM, AS GOFF, JP ALBERT, JP KESSLER, SW METCALFE, DD AF KIRSHENBAUM, AS GOFF, JP ALBERT, JP KESSLER, SW METCALFE, DD TI FIBROBLASTS DETERMINE THE FATE OF FC(EPSILON)RI+ CELL-POPULATIONS IN-VITRO BY SELECTIVELY SUPPORTING THE VIABILITY OF MAST-CELLS WHILE INTERNALIZING AND DEGRADING BASOPHILS SO INTERNATIONAL ARCHIVES OF ALLERGY AND IMMUNOLOGY LA English DT Article DE ALLERGY; BASOPHILS; FIBROBLASTS; IGE RECEPTOR; MAST CELLS ID C-KIT RECEPTOR; GROWTH-FACTOR; BONE-MARROW; PROGENITOR CELLS; GENE-PRODUCT; SI-LOCUS; CULTURE; INVITRO; LIGAND; CD34+ AB To determine the fate of Fc(epsilon)RI+ cells on fibroblasts in vitro, human bone marrow derived CD34+ cells were cultured in the presence of recombinant human interleukin 3 and recombinant human hematopoietic stem cell factor for 3 weeks, and Fc(epsilon)RI+ cells were purified by immunomagnetic selection. This enriched Fc(epsilon)RI+ cell population consisted of 92-94% basophils and 3-5% mast cells as determined by morphologic, immunohistochemical, and ultrastructural criteria. The Fc(epsilon)RI+ cells were then cocultured with 3T3 fibroblasts. Basophils decreased markedly by 1 week and were absent from cocultures by 2-3 weeks, while the mast cell numbers on the fibroblast monolayers remained constant. Ultrastructural examination of cocultures at 2 days demonstrated phagocytosis of basophils by fibroblasts. By 1 week, phagocytosed basophil membranes and granules gave fibroblasts the superficial appearance of mast cells by toluidine blue staining. Mast cells surviving in cocultures could be distinguished from granule-containing fibroblasts by IgE surface labeling and by ultrastructural demonstration of tryptase-positive granules. Thus, while mast cells remain viable in coculture with 3T3 fibroblasts, basophils do not survive and are internalized and degraded by the fibroblast monolayer. C1 GEORGETOWN UNIV,MED CTR,DIV MOLEC VIROL & IMMUNOL,ROCKVILLE,MD. USN,MED RES INST,DEPT IMMUNOBIOL & TRANSPLANTAT,BETHESDA,MD. RP KIRSHENBAUM, AS (reprint author), NIAID,CLIN INVEST LAB,ALLERG DIS SECT,BLDG 10,ROOM 11C212,BETHESDA,MD 20892, USA. NR 29 TC 7 Z9 7 U1 0 U2 0 PU KARGER PI BASEL PA ALLSCHWILERSTRASSE 10, CH-4009 BASEL, SWITZERLAND SN 1018-2438 J9 INT ARCH ALLERGY IMM JI Int. Arch. Allergy Immunol. PD DEC PY 1994 VL 105 IS 4 BP 374 EP 380 PG 7 WC Allergy; Immunology SC Allergy; Immunology GA PW871 UT WOS:A1994PW87100011 PM 7981608 ER PT J AU LIU, J SALETORE, VA LEWIS, TG AF LIU, J SALETORE, VA LEWIS, TG TI SAFE SELF-SCHEDULING - A PARALLEL LOOP SCHEDULING SCHEME FOR SHARED-MEMORY MULTIPROCESSORS SO INTERNATIONAL JOURNAL OF PARALLEL PROGRAMMING LA English DT Article DE PARALLEL LOOPS; SELF-SCHEDULING; SCHEDULING OVERHEAD; LOAD BALANCING; SHARED-MEMORY MULTIPROCESSORS AB In this paper we present Safe Self-Scheduling (SSS), a new scheduling scheme that schedules parallel loops with variable length iteration execution times not known at compile time. The scheme assumes a shared memory space. SSS combines static scheduling with dynamic scheduling and draws favorable advantages from each. First, it reduces the dynamic scheduling overhead by statically scheduling a major portion of loop iterations. Second, the workload is balanced with a simple and efficient self-scheduling scheme by applying a new measure, the smallest critical chore size. Experimental results comparing SSS with other scheduling schemes indicate that SSS surpasses other scheduling schemes. In the experiment on Gauss-Jordan, an application that is suitable for static scheduling schemes, SSS is the only self-scheduling scheme that outperforms the static scheduling scheme. This indicates that SSS achieves a balanced workload with a very small amount of overhead. C1 OREGON STATE UNIV,DEPT COMP SCI,CORVALLIS,OR 97331. USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943. OREGON STATE UNIV,DEPT COMP SCI,CORVALLIS,OR 97331. RP LIU, J (reprint author), WESTERN OREGON STATE COLL,DEPT COMP SCI,MONMOUTH,OR 97361, USA. NR 24 TC 9 Z9 9 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0885-7458 J9 INT J PARALLEL PROG JI Int. J. Parallel Program. PD DEC PY 1994 VL 22 IS 6 BP 589 EP 616 DI 10.1007/BF02577870 PG 28 WC Computer Science, Theory & Methods SC Computer Science GA PZ220 UT WOS:A1994PZ22000001 ER PT J AU KRAVITZ, JH SIEGEL, FR AF KRAVITZ, JH SIEGEL, FR TI CHEMICAL-ELEMENT DISTRIBUTION IN THE SURFACE SEDIMENTS OF KANE BASIN SO JOURNAL OF COASTAL RESEARCH LA English DT Article DE TRANSITION ELEMENTS; RELICT SEDIMENT; DETRITUS; CLAY-SIZE FRACTION; BATHYMETRY; SEDIMENT SOURCE AB Magnesium and a suite of first transition elements were analysed in the < 2 mu m fraction of glacial marine surface sediments of the Kane Basin. High concentrations of Mg, Mn, Cr, Co, Ni, Cu and Ti were observed in the western basin in relict sediment, tentatively identified as Ellesmere island till, containing abundant mafic and carbonate rock detritus. However, Fe and Zn were enriched in the eastern basin where Zn-rich soil and vegetative detritus from Inglefield Land contribute to the sediment source. Unlike other high latitude glacial marine argillaceous sediments which are generally depleted in element concentrations with respect to law-latitude deep-sea clays (NAIDU and HOOD, 1972; NAIDU et al., 1975, 1976), the Kane Basin clay-size fraction is enriched in Fe, Mg, Ti, Cr and Zn, and depleted in Mn, Ni, Co and Cu when compared with tropical-temperate (non-polar) pelagic sediments. The Kane Basin sediment is enriched in Mg, Cr, Co, Ti and Zn, and depleted in Fe, Mn, Ni and Cu with respect to low latitude deep-sea clays. The bathymetry of Kane Basin, current activity there, and detritus derived from various provenances are responsible for this and are reflected by the elemental distribution in the basin's modern sediments. C1 GEORGE WASHINGTON UNIV,DEPT GEOL,WASHINGTON,DC 20052. RP KRAVITZ, JH (reprint author), OFF NAVAL RES,ARLINGTON,VA 22217, USA. NR 38 TC 0 Z9 0 U1 0 U2 0 PU COASTAL EDUCATION & RESEARCH FOUNDATION PI LAWRENCE PA 810 EAST 10TH STREET, LAWRENCE, KS 66044 SN 0749-0208 J9 J COASTAL RES JI J. Coast. Res. PD WIN PY 1994 VL 10 IS 1 BP 101 EP 112 PG 12 WC Environmental Sciences; Geography, Physical; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Physical Geography; Geology GA MV816 UT WOS:A1994MV81600009 ER PT J AU BUDZIEN, SA FELDMAN, PD CONWAY, RR AF BUDZIEN, SA FELDMAN, PD CONWAY, RR TI OBSERVATIONS OF THE FAR-ULTRAVIOLET AIRGLOW BY THE ULTRAVIOLET LIMB IMAGING EXPERIMENT ON STS-39 SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID BIRGE-HOPFIELD BANDS; ELECTRON-IMPACT EXCITATION; CROSS-SECTIONS; ATOMIC OXYGEN; EXTREME ULTRAVIOLET; SOLAR MAXIMUM; OI 1304-A; DAYGLOW; N-2; EMISSIONS AB The Ultraviolet Limb Imaging (UVLIM) experiment flew on STS-39 in the spring gf 1991 to observe the Earth's thermospheric airglow and included a far ultraviolet (1080-1800 Angstrom) spectrometer. We present first results from this spectrometer, including a spectroscopic analysis at 6-Angstrom resolution of H, O, N, and N-2 dayglow emissions and modeling of the observed limb-scan profiles of dayglow emissions. The observed N-2 Lyman-Birge-Hopfield (LBH) emission reflects a vibrational population distribution in the a(1)II(g) state that differs significantly from those predicted for direct electron excitation and excitation with cascade from the a' (1) Sigma(u)(-) and w (1) Delta(u) states. The vibrational population distribution and LBH brightnesses suggest a total cascade rate 45% that of direct excitation, in contrast to laboratory measurements. For the first time, pronounced limb brightening is observed in both the NI lambda 1135 and NI lambda 1200 limb emission profiles, as expected for emissions excited by N-2 dissociation which produces kinetically fast N fragments; however, optically thick components of these features are also observed. Preliminary modeling of the OI lambda 1356, HI lambda 1216, and OI lambda 1304 and OI lambda 1641 emissions agrees to within roughly 10% of the observed limb-scan profiles, but the models underestimate the N, LBH profiles by a factor of 1.4-1.6, consistent with the inferred cascade effect. Other findings include: an OI lambda 1152/lambda 1356 intensity ratio that is inconsistent with the large cascade contribution to OI lambda 1356 from np P-5 states required by laboratory and nightglow observations; nightglow observations of the tropical ultraviolet arcs exhibit a wide range of OI lambda 1356/lambda 1304 intensity ratios and illustrate the complicated observing geometry and radiative transfer effects that must be modeled; and we find a 3-sigma upper limit of 8.5 R to the total LBH vehicle glow emission. C1 JOHNS HOPKINS UNIV,CTR ASTROPHYS SCI,DEPT PHYS & ASTRON,BALTIMORE,MD 21218. RP BUDZIEN, SA (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 56 TC 20 Z9 20 U1 0 U2 2 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 DEC 1 PY 1994 VL 99 IS A12 BP 23275 EP 23287 DI 10.1029/94JA01543 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PV624 UT WOS:A1994PV62400005 ER PT J AU MELENDEZALVIRA, DJ BURNSIDE, RG WALKER, JCG AF MELENDEZALVIRA, DJ BURNSIDE, RG WALKER, JCG TI MODELING THE ARECIBO NIGHTTIME F2 LAYER .2. IONOSPHERIC GRADIENTS SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID MIDNIGHT TEMPERATURE MAXIMUM; F-REGION; ELECTRIC-FIELDS; NEUTRAL WINDS; OPTICAL OBSERVATIONS; THERMOSPHERE; PROPAGATION; DYNAMICS AB The servo model is extended and used to fit horizontal gradients in the F-2 layer height and density and to estimate the zonal Pedersen current and its zonal and meridional gradient. Horizontal gradients were measured from the Arecibo Observatory during the following five nights: August 16-17 and 17-18, 1982; and October 4-5, 5-6, and 9-10, 1983. The model gradients are driven by nonzero current gradients, which are applied as needed to fit the measured gradients in the F-2 peak. The gradient in the peak height is accurately reproduced; the peak density gradient is calculated self-consistently in the model. The divergence of the Pedersen current can be deduced when the current flows zonally and is found to differ from zero. This is a consequence of zonal divergence of the model zonal current. Expressions are derived for the divergence of the Hall current and for the curl of the current in the presence of ionospheric gradients. The vertical vorticity of the F region current is determined from the radar and optical measurements and the mass spectrometer/incoherent scatter (MSIS) neutral densities. Both neutral and plasma motions generate current vorticity equally as expected from the F region dynamo. The measured velocity gradients produce more current gradients and vorticity than the measured conductance gradients. The measured height gradient in the perpendicular-north plasma drift (partial derivative(z) nu perpendicular to N) is the dominant term in the vorticity and drives the two current shears that cause vorticity. Geometrical factors increase (partial derivative(z) nu perpendicular to N) by about 13% in the zonal gradient of the meridional current over the meridional gradient of the zonal current. This causes anticorrelation between the former current shear and the vorticity. The two measured shears generally follow each other, have opposing vorticities and large uncertainties. The nighttime current may be irrotational or have constant vorticity. Large current gradients occur in conjunction with observed descents of the F-2 peak height. The gradients are interpreted as due to the midnight pressure bulge at low latitudes. Short-period gravity waves of meteorological origin are ruled out as they were not observed and are Limited in their ability to reach ionospheric heights. The harmonic analysis used to obtain horizontal wind gradients is largely unaffected by spatially uniform wind accelerations. Therefore the deduced spatial variations in the measured winds are unlikely to be due to temporal variations. C1 ARECIBO OBSERV,ARECIBO,PR. UNIV MICHIGAN,DEPT ATMOSPHER OCEAN & SPACE SCI,SPACE PHYS RES LAB,ANN ARBOR,MI 48109. NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,SPACE SCI LAB,HUNTSVILLE,AL 35812. RP MELENDEZALVIRA, DJ (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 49 TC 3 Z9 3 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 DEC 1 PY 1994 VL 99 IS A12 BP 23307 EP 23327 DI 10.1029/94JA01812 PG 21 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PV624 UT WOS:A1994PV62400008 ER PT J AU SHAPIRO, VD SHEVCHENKO, VI CARGILL, PJ PAPADOPOULOS, K AF SHAPIRO, VD SHEVCHENKO, VI CARGILL, PJ PAPADOPOULOS, K TI MODULATIONAL INSTABILITY OF LOWER-HYBRID WAVES AT THE MAGNETOPAUSE SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID DRIFT INSTABILITY; BOUNDARY-LAYER; PLASMA-DIFFUSION; TURBULENCE; SIMULATIONS; EVOLUTION; BETA AB The role of lower hybrid waves at the magnetopause is reexamined. It is found that for the maximum observed wave power, the lower hybrid waves are unstable to a modulational instability on the magnetosheath side of the magnetopause. The modulational instability leads to localized field structures oriented predominantly along the magnetic field. Such patchy lower hybrid turbulence has been observed by some spacecraft. As-a result of the large T-i/T-e ratio, the waves saturate by ion heating; as a result, unlike other settings,(e.g. comets, critical ionization phenomena), energetic electrons are not expected. The stochastic electron transport in the presence of such turbulence is analyzed and results in. strongly anisotropic electron diffusion, with the dominant direction across the magnetic field. The diffusion rate exceeds significantly that expected from quasi-linear considerations and, for magnetopause parameters, also exceeds the rate discussed by Sonnerup (1980). C1 UNIV MARYLAND,DEPT ASTRON,COLLEGE PK,MD 20742. USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,WASHINGTON,DC 20375. UNIV MARYLAND,DEPT PHYS,COLLEGE PK,MD 20742. RP SHAPIRO, VD (reprint author), UNIV CALIF SAN DIEGO,CALIF SPACE INST,DEPT PHYS,LA JOLLA,CA 92029, USA. NR 35 TC 17 Z9 17 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 DEC 1 PY 1994 VL 99 IS A12 BP 23735 EP 23740 DI 10.1029/94JA02074 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PV624 UT WOS:A1994PV62400048 ER PT J AU PHILLIPS, AT ROSEN, JB AF PHILLIPS, AT ROSEN, JB TI COMPUTATIONAL COMPARISON OF 2 METHODS FOR CONSTRAINED GLOBAL OPTIMIZATION SO JOURNAL OF GLOBAL OPTIMIZATION LA English DT Article DE GLOBAL OPTIMIZATION; STOCHASTIC METHODS; DETERMINISTIC METHODS AB For constrained concave global minimization problems, two very different solution techniques have been investigated. The first such method is a stochastic multistart approach which typically finds, with high probability, all local minima for the problem. The second method is deterministic and guarantees a global minimum solution to within any user specified tolerance. It is the purpose of this paper to make a careful comparison of these two methods on a range of test problems using separable concave objectives over compact polyhedral sets, and to investigate in this way the advantages and disadvantages of each method. A direct computational comparison, on the same set of over 140 problems, is presented. C1 USN ACAD,DEPT COMP SCI,ANNAPOLIS,MD 21402. UNIV MINNESOTA,DEPT COMP SCI,MINNEAPOLIS,MN 55455. NR 7 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0925-5001 J9 J GLOBAL OPTIM JI J. Glob. Optim. PD DEC PY 1994 VL 5 IS 4 BP 325 EP 332 DI 10.1007/BF01096682 PG 8 WC Operations Research & Management Science; Mathematics, Applied SC Operations Research & Management Science; Mathematics GA PX030 UT WOS:A1994PX03000002 ER PT J AU ATKINSON, JLD LANE, JI AF ATKINSON, JLD LANE, JI TI FRONTAL SAGITTAL MENINGIOMA - TUMOR PARASITIZATION OF CORTICAL VASCULATURE AS THE ETIOLOGY OF PERITUMORAL EDEMA - CASE-REPORT SO JOURNAL OF NEUROSURGERY LA English DT Note DE MENINGIOMA; MALIGNANT MENINGIOMA; PERITUMORAL EDEMA ID CEREBRAL EDEMA; BRAIN EDEMA; FEATURES AB Peritumoral edema surrounding meningiomas is poorly understood; however, several theories have been proposed in the literature. A case is presented here of a frontal sagittal meningioma symmetrically effacing both frontal lobes that subsequently evokes peritumoral edema on only one side. The tumor is histologically identical on the left and right sides. Angiograms were obtained that support previous work, which suggests that the degree of cortical parasitization of blood supply correlates with peritumoral edema whether or not tumor secretory factors are involved. C1 USN,HOSP OAKLAND,DEPT NEUROSURG,OAKLAND,CA. USN,HOSP OAKLAND,DEPT NEURORADIOL,OAKLAND,CA. NR 15 TC 10 Z9 12 U1 0 U2 0 PU AMER ASSOC NEUROLOGICAL SURGEONS PI CHARLOTTESVILLE PA UNIV VIRGINIA, 1224 WEST MAIN ST, STE 450, CHARLOTTESVILLE, VA 22903 SN 0022-3085 J9 J NEUROSURG JI J. Neurosurg. PD DEC PY 1994 VL 81 IS 6 BP 924 EP 926 DI 10.3171/jns.1994.81.6.0924 PG 3 WC Clinical Neurology; Surgery SC Neurosciences & Neurology; Surgery GA PU322 UT WOS:A1994PU32200016 PM 7965124 ER PT J AU PAPOULIAS, FA AYDIN, I AF PAPOULIAS, FA AYDIN, I TI OUT-OF-PLANE SOLUTIONS AND BIFURCATIONS OF SUBMERSIBLES IN FREE POSITIVE BUOYANCY ASCENT SO JOURNAL OF SHIP RESEARCH LA English DT Article AB The problem of motion stability of submersible vehicles in free positive buoyancy ascent is analyzed. Motion is allowed to occur in combined vertical and horizontal planes. Continuation and catastrophe theory techniques are employed to trace all possible steady-state solutions in six degrees of freedom, while local linearization reveals their stability properties. Vehicle geometric properties and control surface deflections are used as the primary bifurcation parameters. It is shown that multiple solutions may exist in the form of pitchfork bifurcation, solution separation, hysteresis, and teardrop branches. Regions in parameter spaces are identified where extreme sensitivity of solutions to geometric properties and hydrodynamic modeling is present. RP PAPOULIAS, FA (reprint author), USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93940, USA. NR 0 TC 0 Z9 2 U1 0 U2 0 PU SOC NAVAL ARCH MARINE ENG PI JERSEY CITY PA 601 PAVONIA AVENUE, JERSEY CITY, NJ 07306 SN 0022-4502 J9 J SHIP RES JI J. Ship Res. PD DEC PY 1994 VL 38 IS 4 BP 259 EP 271 PG 13 WC Engineering, Marine; Engineering, Civil SC Engineering GA QN301 UT WOS:A1994QN30100001 ER PT J AU HORWITZ, JS COTELL, CM CHRISEY, DB POND, JM GRABOWSKI, KS CARROLL, KR NEWMAN, HS OSOFSKY, MS AF HORWITZ, JS COTELL, CM CHRISEY, DB POND, JM GRABOWSKI, KS CARROLL, KR NEWMAN, HS OSOFSKY, MS TI ORIGINS OF CONDUCTIVE LOSSES AT MICROWAVE-FREQUENCIES IN YBA2CU3O7-DELTA/LAALO3/YBA2CU3O7-DELTA TRILAYERS DEPOSITED BY PULSED-LASER DEPOSITION SO JOURNAL OF SUPERCONDUCTIVITY LA English DT Article DE YBA2CU3O7-DELTA; PULSED LASER DEPOSITION; LAALO3; MICROWAVE SURFACE RESISTANCE; THIN FILM MICROSTRUCTURE; TEM ID EPITAXIAL-GROWTH; THIN-FILMS AB Oriented YBa2Cu3O7-delta/LaAlO3/YBa2Cu3O7-delta trilayers were deposited by pulsed laser deposition (PLD) onto [100] MgO and LaAlO3. Film thicknesses varied from 2000-5000 Angstrom/layer. A comparision of structure and transport data for the bottom and top superconducting layers indicated a slight decrease in film quality for the top superconducting layer. The critical temperature was lower for the top superconducting layer (90.5 vs. similar to 90 K) and the microwave surface resistance was higher (increasing from similar to 2 to 18 m Omega at 36 GHz, 20 K). The resistivity of the dielectric was estimated to be 10(6) Omega cm, and the loss tangent of the dielectric film at microwave frequencies had an upper limit of 0.01. Cross-sectional TEM analysis of the trilayer structure showed a high density of threading dislocations in the dielectric layer that appeared to nucleate at steps in the underlying superconducting layer. The threading dislocations may serve as conduction paths in the LaAlO3 layer. RP HORWITZ, JS (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Osofsky, Michael/A-1050-2010; OI Grabowski, Kenneth/0000-0003-0816-001X NR 12 TC 2 Z9 2 U1 0 U2 2 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0896-1107 J9 J SUPERCOND JI J. Supercond. PD DEC PY 1994 VL 7 IS 6 BP 965 EP 969 DI 10.1007/BF00732280 PG 5 WC Physics, Applied; Physics, Condensed Matter SC Physics GA QA692 UT WOS:A1994QA69200018 ER PT J AU PRASAD, A PARK, EK AF PRASAD, A PARK, EK TI REUSE SYSTEM - AN ARTIFICIAL INTELLIGENCE-BASED APPROACH SO JOURNAL OF SYSTEMS AND SOFTWARE LA English DT Article; Proceedings Paper CT 1st International Conference on Information and Knowledge Management (CIKM) CY NOV 08-11, 1992 CL BALTIMORE, MD ID SOFTWARE AB The concept of software reusability is examined from the perspective of classifying and accessing reusable software. To improve the practicality of software reuse, one must know its location and have an understanding of the reusable components and its adaptability to a particular need. The current state-of-the-art methods are assessed, and a new system for performing classification-based reuse is proposed. The concepts of subsumption and closeness are used to model function composition and function modification in software construction. These concepts and their associated metrics are used by the proposed reuse system to facilitate searching for reusable components and provide capabilities for helping programmers assess the worth of reusing particular packages. A description of the major algorithms required to compute these metrics is given. A sample user/system interaction that illustrates how these components and metrics are used to retrieve reusable components is presented. Also, domain analysis, which; helps in deciding whether a particular application is oriented towards software reuse, is given. C1 USN ACAD,DEPT COMP SCI,ANNAPOLIS,MD 21402. UNIV MARYLAND,DEPT COMP SCI,BALTIMORE,MD. NR 18 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE PUBL CO 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 DEC PY 1994 VL 27 IS 3 BP 207 EP 221 DI 10.1016/0164-1212(94)90043-4 PG 15 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA PY272 UT WOS:A1994PY27200006 ER PT J AU ORRIS, GJ MCDONALD, BE KUPERMAN, WA AF ORRIS, GJ MCDONALD, BE KUPERMAN, WA TI MATCHED-PHASE NOISE-REDUCTION SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID SHALLOW-WATER; AMBIENT NOISE; GENERATED NOISE; LOCALIZATION; DEPENDENCE; LEVEL; OCEAN RP ORRIS, GJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 26 TC 5 Z9 11 U1 0 U2 2 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 DEC PY 1994 VL 96 IS 6 BP 3499 EP 3503 DI 10.1121/1.410610 PG 5 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA PX182 UT WOS:A1994PX18200012 ER PT J AU BORGIOTTI, GV JONES, KE AF BORGIOTTI, GV JONES, KE TI FREQUENCY INDEPENDENCE PROPERTY OF RADIATION SPATIAL FILTERS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID BOUNDARY MEASUREMENTS; ACOUSTIC FLUID; BODY C1 USN,CTR SURFACE WARFARE,CARDEROCK DIV,DAVID TAYLOR MODEL BASIN,BETHESDA,MD 20084. RP BORGIOTTI, GV (reprint author), GEORGE WASHINGTON UNIV,DEPT ELECT ENGN & COMP SCI,WASHINGTON,DC 20052, USA. NR 6 TC 27 Z9 36 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 DEC PY 1994 VL 96 IS 6 BP 3516 EP 3524 DI 10.1121/1.411407 PG 9 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA PX182 UT WOS:A1994PX18200014 ER PT J AU FEUILLADE, C WERBY, MF AF FEUILLADE, C WERBY, MF TI RESONANCES OF DEFORMED GAS-BUBBLES IN LIQUIDS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID ACOUSTIC SCATTERING; SOUND SCATTERING; FINITE LENGTH; CYLINDERS; FLUID; FISH RP FEUILLADE, C (reprint author), USN,RES LAB,BAY ST LOUIS,MS 39529, USA. NR 21 TC 35 Z9 36 U1 0 U2 1 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 DEC PY 1994 VL 96 IS 6 BP 3684 EP 3692 DI 10.1121/1.410558 PG 9 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA PX182 UT WOS:A1994PX18200030 ER PT J AU GALIB, TA KATZ, RA KO, SH SANDMAN, B AF GALIB, TA KATZ, RA KO, SH SANDMAN, B TI MEASUREMENTS OF TURBULENT PRESSURE-FLUCTUATIONS USING A BUOYANT VEHICLE COATED WITH A THIN ELASTOMER LAYER SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article RP GALIB, TA (reprint author), USN,CTR UNDERWATER SYST,NEWPORT,RI 02841, USA. NR 14 TC 4 Z9 4 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 DEC PY 1994 VL 96 IS 6 BP 3800 EP 3803 DI 10.1121/1.410569 PG 4 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA PX182 UT WOS:A1994PX18200042 ER PT J AU RANDALL, DA BRADY, JG BOONE, JL BARRETT, TL AF RANDALL, DA BRADY, JG BOONE, JL BARRETT, TL TI FRONTALIS-ASSOCIATED SARCOMA OF THE FOREHEAD SO JOURNAL OF THE AMERICAN ACADEMY OF DERMATOLOGY LA English DT Note ID SOFT-TISSUE SARCOMAS; HEAD; NECK; LIPOMA; ADULTS C1 USN,MED CTR,DEPT OTOLARYNGOL,SAN DIEGO,CA 92134. USN,MED CTR,DEPT DERMATOL,SAN DIEGO,CA 92134. RP RANDALL, DA (reprint author), USN,MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. NR 17 TC 2 Z9 2 U1 0 U2 0 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 DEC PY 1994 VL 31 IS 6 BP 1048 EP 1049 PG 2 WC Dermatology SC Dermatology GA PT856 UT WOS:A1994PT85600017 PM 7962754 ER PT J AU VANDERAH, TA LOWEMA, CK GAGNON, DR AF VANDERAH, TA LOWEMA, CK GAGNON, DR TI SYNTHESIS AND DIELECTRIC-PROPERTIES OF SUBSTITUTED LANTHANUM ALUMINATE SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID X-RAY TOPOGRAPHY; SINGLE-CRYSTALS; GROWTH; FILMS AB LaAlO3 was chemically modified in order to ascertain the effects of substitution of larger cations on the compound's slight rhombohedral distortion from cubic symmetry-a property that often degrades the performance of LaAlO3 substrates for epitaxial high-temperature superconducting films. La1-xSrxAl1-xTixO3 (x = 0.05, 0.10, 0.15, 0.25), La1-xSrxAl1-xZr(x)O(3), La1-xSrxAl1-xMgxO3-2xF2x, and La1-xSrxAl1-xScxO3-xFx (x = 0.05, 0.10, 0.15) were prepared in polycrystalline form and 1-2 mm single crystals of the Sr,Ti- and Sr,Zr-substituted systems were grown using a PbO-PbF2-B2O3-PbO2 flux. Shifts in the peak positions of the X-ray powder diffraction patterns confirmed substitution of the larger cations. The diffraction patterns were also typified by line-broadening and a decrease in the rhombohedral splitting at all doping levels. The dielectric constant of LaAlO3 was unchanged for all of the fluoride-containing systems and for the 5% Sr,Ti- and Sr,Zr-systems. C1 USN,AIR WARFARE CTR WEAPONS DIV,RES DEPT,DIV PHYS,CHINA LAKE,CA 93555. RP VANDERAH, TA (reprint author), USN,AIR WARFARE CTR WEAPONS DIV,RES DEPT,DIV CHEM,CHINA LAKE,CA 93555, USA. NR 22 TC 15 Z9 15 U1 0 U2 6 PU AMER CERAMIC SOC 735 CERAMIC PLACE PI WESTERVILLE PA PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD DEC PY 1994 VL 77 IS 12 BP 3125 EP 3130 DI 10.1111/j.1151-2916.1994.tb04559.x PG 6 WC Materials Science, Ceramics SC Materials Science GA QC570 UT WOS:A1994QC57000011 ER PT J AU GLENDENING, JW AF GLENDENING, JW TI DEPENDENCE OF A PLUME HEAT-BUDGET UPON LATERAL ADVECTION SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID LARGE-EDDY-SIMULATION AB The structure and heat budget of a plume created by a linear heat source is investigated, demonstrating their dependence upon the larger-scale cross-source flow. A large-eddy model simulates individual thermal eddies produced by a source 200 m wide having an average surface temperature flux of 0.20 K m s(-1), parameters appropriate to an Arctic lead-that is, to a break in the polar ice field. When the large-scale cross-flow is relatively weak, maximum turbulent development occurs over the source itself and the mean updraft is relatively strong. Thermally induced lateral inflow then concentrates the vertical heat transport over the source, and vertical advection accounts for over half the total heat transfer. Horizontal turbulent heat transport is important throughout the mean updraft. Turbulent vertical heat flux dominates the heat budget only in the near-surface region. With increasing externally forced cross-flow, mean and turbulent vertical velocities are weakened. Transport mechanisms are significantly altered when the cross-flow is sufficiently strong to move the region of maximum turbulence beyond the source. Turbulent vertical heat flux then becomes important through the entire plume depth, and its heat transfer becomes larger than that due to mean vertical transport. Maximum turbulent development occurs horizontally where the parcel transit time from the source centerline is approximately half the Brunt-Vaisala period of the surrounding environment. When this occurs over the source, its position coincides with that of the mean updraft. A criterion for strong updraft development, and consequent large vertical advective transport, is for the transit time of a parcel over the source to be less than the Brunt-Vaisala period. RP GLENDENING, JW (reprint author), USN,RES LAB,DIV MARINE METEOROL,CODE 7541,MONTEREY,CA 93943, USA. NR 21 TC 7 Z9 7 U1 0 U2 0 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 DEC 1 PY 1994 VL 51 IS 23 BP 3517 EP 3530 DI 10.1175/1520-0469(1994)051<3517:DOAPHB>2.0.CO;2 PG 14 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA PW533 UT WOS:A1994PW53300010 ER PT J AU HAWLEY, JG ASHCROFT, SJ PATRICK, MA AF HAWLEY, JG ASHCROFT, SJ PATRICK, MA TI AN ASSESSMENT OF THE EFFECTS OF OPERATING A DIESEL-ENGINE ON AN ATMOSPHERE OF OXYGEN AND CARBON-DIOXIDE SO JOURNAL OF THE INSTITUTE OF ENERGY LA English DT Article AB Experimental work at the Royal Naval Engineering College and the University of Exeter has demonstrated that a diesel engine operating on recycled combustion products has sufficient potential to warrant consideration for Autonomous Underwater Vehicle (AUV) applications. Results are given for a Perkins T4.236 diesel engine operating on O-2/CO2 mixtures. The effect of CO2 concentration and inlet-gas preheat has been studied in relation to the torque, power output, fuel consumption, exhaust-gas temperature, cylinder pressure and combustion characteristics. The engine operates satisfactorily on a 30% O-2/70% CO2 mixture but, in comparison with the naturally aspirated engine, a degradation in the performance is observed amounting to a reduction of 20-23% in brake power and, more seriously, an increase of 23-28% in brake specific fuel consumption under maximum-torque conditions. RP HAWLEY, JG (reprint author), USN ACAD,DEPT NAVAL ARCHITECTURE OCEAN & MARINE ENGN,ANNAPOLIS,MD, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU INST ENERGY PI LONDON PA 18 DEVONSHIRE ST PORTLAND PLACE, LONDON, ENGLAND W1N 2AU SN 0144-2600 J9 J I ENERGY JI J. Inst. Energy PD DEC PY 1994 VL 67 IS 473 BP 138 EP 142 PG 5 WC Energy & Fuels SC Energy & Fuels GA QA618 UT WOS:A1994QA61800001 ER PT J AU BORGES, CF AF BORGES, CF TI NUMERICAL DETERMINATION OF TRISTIMULUS VALUES SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION LA English DT Article ID SPECTRAL DATA AB I consider numerical methods for evaluating the tristimulus values of P-lambda, an arbitrary spectral power distribution. Various classical quadrature rules are discussed, and numerically stable algorithms for their construction are presented. I introduce a new quadrature rule developed specifically for evaluating tristimulus values. The method involves the simultaneous generation of three quadrature rules sharing a common set of nodes that is optimal in a sense much like the optimality of the Gauss rules. RP BORGES, CF (reprint author), USN,POSTGRAD SCH,CODE MA BC,MONTEREY,CA 93943, USA. RI Borges, Carlos/E-3157-2010 NR 19 TC 3 Z9 3 U1 1 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3232 J9 J OPT SOC AM A JI J. Opt. Soc. Am. A-Opt. Image Sci. Vis. PD DEC PY 1994 VL 11 IS 12 BP 3152 EP 3161 DI 10.1364/JOSAA.11.003152 PG 10 WC Optics SC Optics GA PX509 UT WOS:A1994PX50900004 ER PT J AU BILDSTEN, SA DMOCHOWSKI, RR SPINDEL, MR AUMAN, JR AF BILDSTEN, SA DMOCHOWSKI, RR SPINDEL, MR AUMAN, JR TI THE RISK OF RHABDOMYOLYSIS AND ACUTE-RENAL-FAILURE WITH THE PATIENT IN THE EXAGGERATED LITHOTOMY POSITION SO JOURNAL OF UROLOGY LA English DT Article DE RHABDOMYOLYSIS; RENAL FAILURE, ACUTE; CREATININE; CREATINE ID NONTRAUMATIC RHABDOMYOLYSIS; COMPARTMENT SYNDROME; MYOGLOBINURIA; COMPLICATION; SODIUM AB Rhabdomyolysis with subsequent renal failure has been well documented as a complication of major trauma. However, this complication from elective urological procedures is less well recognized. In 10 patients who underwent elective urethroplasty serum levels of creatine kinase and urinary myoglobin were examined preoperatively and postoperatively. These patients were placed in the lithotomy position for several hours and had minimal muscle dissection. Serum creatine kinase was noted to increase significantly postoperatively to greater than 1,000 units and in 1 patient myoglobin was detected in the urine. This finding indicates that there is, indeed, a risk of muscle injury and potential rhabdomyolysis in these patients from the use of the exaggerated lithotomy position. C1 EASTERN VIRGINIA GRAD SCH MED,DEPT PLAST & RECONSTRUCT SURG,NORFOLK,VA. RP BILDSTEN, SA (reprint author), USN HOSP,DEPT UROL,BREMERTON,WA 98312, USA. NR 23 TC 30 Z9 30 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0022-5347 J9 J UROLOGY JI J. Urol. PD DEC PY 1994 VL 152 IS 6 BP 1970 EP 1972 PN 1 PG 3 WC Urology & Nephrology SC Urology & Nephrology GA PR245 UT WOS:A1994PR24500011 PM 7966652 ER PT J AU ROLAND, CM WALTON, JH MILLER, JB AF ROLAND, CM WALTON, JH MILLER, JB TI PROTON NMR DETERMINATION OF CRYSTALLINITY IN POLY(ETHYLENE-TEREPHTHALATE) SO MAGNETIC RESONANCE IN CHEMISTRY LA English DT Article DE NMR; H-1 NMR; CRYSTALLINITY; POLY(ETHYLENE TEREPHTHALATE) ID POLY(ETHYLENE-TEREPHTHALATE) FIBERS; MELTING BEHAVIOR; AMORPHOUS PHASE; PET FIBERS; POLYMERS; CRYSTALLIZATION; MORPHOLOGY; STATE AB The results of proton NMR T-1xz measurements on poly(ethylene terephthalate) (PET) films and fibers processed under various conditions are presented, Consistent with previous results, two domains are found in isotropic, amorp hous PET. The NMR results provide an accurate measure of crystallinity in PET films and fibers, without requiring any assumptions about the semi-crystalline morphology of the polymer. The NMR technique is particularly advantageous for PET fibers where orientation effects interfere with the more traditional density determination of crystallinity. C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NR 37 TC 4 Z9 4 U1 1 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0749-1581 J9 MAGN RESON CHEM JI Magn. Reson. Chem. PD DEC PY 1994 VL 32 SI SI BP S36 EP S39 PG 4 WC Chemistry, Multidisciplinary; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA QG447 UT WOS:A1994QG44700008 ER PT J AU PELLENBARG, RE MORRIS, RA JOHNSON, DH MARTIN, SJ AF PELLENBARG, RE MORRIS, RA JOHNSON, DH MARTIN, SJ TI MARCHEM-93 - A WORKSHOP FOCUSED ON CONCERNS OF THE MARINE CHEMISTRY COMMUNITY SO MARINE CHEMISTRY LA English DT Article AB This review surveys the results of a workshop conducted in the summer of 1993. The purpose of the workshop was to assemble a group of university-based marine chemists, government scientists and funding personnel, and industrial suppliers. Thus, these elements of the marine science community were encouraged to interact to more clearly define the state and needs of the marine chemistry instrumentation field. The workshop was sponsored by the Office of Naval Research and the National Science Foundation. C1 OFF NAVAL RES,ARLINGTON,VA 22217. MARTIN LABS INC,HOUSTON,TX 77258. RP PELLENBARG, RE (reprint author), USN,RES LAB,DIV CHEM,CODE 6180,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-4203 J9 MAR CHEM JI Mar. Chem. PD DEC PY 1994 VL 48 IS 1 BP 83 EP 86 DI 10.1016/0304-4203(94)90064-7 PG 4 WC Chemistry, Multidisciplinary; Oceanography SC Chemistry; Oceanography GA QB634 UT WOS:A1994QB63400007 ER PT J AU STUBBLEFIELD, WL HARTWIG, E HEINRICHS, DF AF STUBBLEFIELD, WL HARTWIG, E HEINRICHS, DF TI A NATIONAL FLEET SYSTEM - A FEDERAL VIEWPOINT SO MARINE TECHNOLOGY SOCIETY JOURNAL LA English DT Note C1 NATL SCI FDN,ARLINGTON,VA. USN,RES LAB,WASHINGTON,DC 20375. RP STUBBLEFIELD, WL (reprint author), OFF NOAA CORPS OPERAT,SILVER SPRING,MD, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MARINE TECHNOLOGY SOC INC PI WASHINGTON PA 1828 L ST NW 9TH FLOOR, WASHINGTON, DC 20036 SN 0025-3324 J9 MAR TECHNOL SOC J JI Mar. Technol. Soc. J. PD WIN PY 1994 VL 28 IS 4 BP 56 EP 57 PG 2 WC Engineering, Ocean; Oceanography SC Engineering; Oceanography GA QT178 UT WOS:A1994QT17800012 ER PT J AU ZHANG, JM PEREZ, RJ WONG, CR LAVERNIA, EJ AF ZHANG, JM PEREZ, RJ WONG, CR LAVERNIA, EJ TI EFFECTS OF SECONDARY PHASES ON THE DAMPING BEHAVIOR OF METALS, ALLOYS AND METAL-MATRIX COMPOSITES SO MATERIALS SCIENCE & ENGINEERING R-REPORTS LA English DT Review DE SECONDARY PHASES; DAMPING; METALS; ALLOYS; METAL MATRIX COMPOSITES ID THERMAL-EXPANSION MISMATCH; INTERNAL-FRICTION; SPRAY ATOMIZATION; ALUMINUM-ALLOYS; DISLOCATION GENERATION; TEMPERATURE-DEPENDENCE; MECHANICAL-PROPERTIES; ELECTRON-MICROSCOPY; ROOM-TEMPERATURE; YOUNGS MODULUS AB An understanding of the precise correlation between the presence of secondary phases and material damping has eluded investigators, partly as a result of the fact that often there are various mechanisms involved. As a step towards the clarification of damping phenomena in metals and alloys, this paper provides a systematic review of the studies that have been completed on the damping mechanisms present in metals and alloys, with particular emphasis on precipitation. The damping mechanisms associated with secondary phases in metals and alloys have been subdivided into four categories, namely interface damping theory, thermal mismatch-induced dislocation damping theory, interaction damping theory and the rule of mixtures damping theory. A number of alloy systems are discussed to demonstrate the applicability of the four types of theory and the level of understanding of these complex mechanisms. As an extension of precipitation damping theory, the damping behaviour and mechanisms in particle-reinforced metal matrix composites are extensively discussed. C1 USN,WARFARE RES CTR,CARDEROCK DIV,ANNAPOLIS,MD 21402. RP ZHANG, JM (reprint author), UNIV CALIF IRVINE,DEPT CHEM ENGN & MAT SCI,IRVINE,CA 92717, USA. NR 199 TC 117 Z9 144 U1 1 U2 23 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0927-796X J9 MAT SCI ENG R JI Mater. Sci. Eng. R-Rep. PD DEC PY 1994 VL 13 IS 8 BP 325 EP 389 DI 10.1016/0927-796X(94)90010-8 PG 65 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA QR754 UT WOS:A1994QR75400001 ER PT J AU WAYMAN, CM AARONSON, HI HIRTH, JP RATH, BB AF WAYMAN, CM AARONSON, HI HIRTH, JP RATH, BB TI PROCEEDINGS OF THE PACIFIC RIM CONFERENCE ON THE ROLES OF SHEAR AND DIFFUSION IN THE FORMATION OF PLATE-SHAPED TRANSFORMATION PRODUCTS .2. - FOREWORD SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Editorial Material C1 WASHINGTON STATE UNIV,PULLMAN,WA 99164. USN,RES LAB,WASHINGTON,DC 20375. USN,RES LAB,GEOCENTERS INC,WASHINGTON,DC. RP WAYMAN, CM (reprint author), UNIV ILLINOIS,URBANA,IL 61801, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 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 DEC PY 1994 VL 25 IS 12 BP 2553 EP 2554 PG 2 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA QB881 UT WOS:A1994QB88100001 ER PT J AU RAVISHANKAR, N AARONSON, HI CHATTOPADHYAY, K AF RAVISHANKAR, N AARONSON, HI CHATTOPADHYAY, K TI MECHANISM OF THE EARLY STAGES OF ALPHA-1 PLATE FORMATION IN A CU-39 PCT ZN ALLOY SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT Pacific Rim Conference on the Role of Shear and Diffusion in the Formation of Plate-Shaped Transformation Products CY DEC 18-22, 1992 CL KONA, HI SP ASM INT, PHASE TRANSFORMAT COMM ID ANALYTICAL ELECTRON-MICROSCOPY; CU-ZN; BAINITIC TRANSFORMATION; AL ALLOY; GROWTH; NUCLEATION; KINETICS AB The early stages in the formation of alpha(1) plates in the ordered beta' matrix of a Cu-39 pct Zn alloy have been studied with transmission electron microscopy (TEM). The early stage plates were found to be free of stacking faults. Their contrast features are indeed those normally expected from small coherent plates. Electron microdiffraction confirms that these plates have the 9R structure characteristic of alpha(1) with the same lattice parameters and orientation relationships reported by previous investigators at much later stages of growth. Similarly, the 9R structure was disordered, even though it was formed in an ordered matrix, again repeating previous results obtained at a later stage of growth. These results further support the view that-the alpha(1) Cu-Zn plates form by a diffusion-controlled mechanism. C1 USN,RES LAB,MET PHYS BRANCH,GEOCENTERS INC,WASHINGTON,DC 20375. RP RAVISHANKAR, N (reprint author), INDIAN INST SCI,CTR ADV STUDY,DEPT MET,BANGALORE 560012,KARNATAKA,INDIA. RI Narayanan, Ravishankar/G-4866-2010 NR 27 TC 10 Z9 10 U1 0 U2 1 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 DEC PY 1994 VL 25 IS 12 BP 2631 EP 2637 DI 10.1007/BF02649216 PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA QB881 UT WOS:A1994QB88100010 ER PT J AU HIRTH, JP AARONSON, HI KHACHATURYAN, A CAHN, JW CHRISTIAN, JW TSUZAKI, K OLSON, GB HOWE, JM WAYMAN, CM ENOMOTO, M LEE, JK CHEN, H HSU, TY RUSSELL, KC BANERJEE, S FANG, HS MUDDLE, BC HALL, MG AF HIRTH, JP AARONSON, HI KHACHATURYAN, A CAHN, JW CHRISTIAN, JW TSUZAKI, K OLSON, GB HOWE, JM WAYMAN, CM ENOMOTO, M LEE, JK CHEN, H HSU, TY RUSSELL, KC BANERJEE, S FANG, HS MUDDLE, BC HALL, MG TI PACIFIC RIM CONFERENCE ON THE ROLES OF SHEAR AND DIFFUSION IN THE FORMATION OF PLATE-SHAPED TRANSFORMATION PRODUCTS - GENERAL DISCUSSION SESSION SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Discussion C1 USN,RES LAB,MET PHYS LAB,WASHINGTON,DC 20375. WASHINGTON STATE UNIV,DEPT MECH & MAT ENGN,PULLMAN,WA 99164. UNIV ILLINOIS,DEPT MAT SCI & ENGN,URBANA,IL 61801. RP HIRTH, JP (reprint author), GEOCENTERS INC,FT WASHINGTON,MD, USA. RI Olson, Gregory/B-7529-2009 NR 0 TC 15 Z9 15 U1 0 U2 2 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 DEC PY 1994 VL 25 IS 12 BP 2655 EP 2673 PG 19 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA QB881 UT WOS:A1994QB88100013 ER PT J AU MAYANO, MJ AF MAYANO, MJ TI THE ORIGINS OF DEMOCRATIZATION IN POLAND - WORKERS, INTELLECTUALS, AND OPPOSITIONAL POLITICS, 1976-1980 - BERNHARD,MH SO MILLENNIUM-JOURNAL OF INTERNATIONAL STUDIES LA English DT Book Review RP MAYANO, MJ (reprint author), USN,POSTGRAD SCH,MONTEREY,CA 93940, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU MILLENNIUM-J INT STUD PI LONDON PA LONDON SCHOOL ECONOMICS HOUGHTON ST, LONDON, ENGLAND WC2A 2AE SN 0305-8298 J9 MILLENNIUM-J INT ST JI Millennium-J. Int. Stud. PD WIN PY 1994 VL 23 IS 3 BP 717 EP 718 DI 10.1177/03058298940230030301 PG 2 WC International Relations SC International Relations GA QN722 UT WOS:A1994QN72200010 ER PT J AU WIRTZ, JJ AF WIRTZ, JJ TI FROM POLARIS TO TRIDENT - THE DEVELOPMENT OF US FLEET BALLISTIC-MISSILE TECHNOLOGY - SPINARDI,G SO MILLENNIUM-JOURNAL OF INTERNATIONAL STUDIES 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 MILLENNIUM-J INT STUD PI LONDON PA LONDON SCHOOL ECONOMICS HOUGHTON ST, LONDON, ENGLAND WC2A 2AE SN 0305-8298 J9 MILLENNIUM-J INT ST JI Millennium-J. Int. Stud. PD WIN PY 1994 VL 23 IS 3 BP 779 EP 780 DI 10.1177/03058298940230030338 PG 2 WC International Relations SC International Relations GA QN722 UT WOS:A1994QN72200054 ER PT J AU NIKLINSKA, BB HOU, D JUNE, C WEISSMAN, AM ASHWELL, JD AF NIKLINSKA, BB HOU, D JUNE, C WEISSMAN, AM ASHWELL, JD TI CD45 TYROSINE PHOSPHATASE-ACTIVITY AND MEMBRANE ANCHORING ARE REQUIRED FOR T-CELL ANTIGEN RECEPTOR SIGNALING SO MOLECULAR AND CELLULAR BIOLOGY LA English DT Article ID LEUKOCYTE-COMMON ANTIGEN; LYMPHOCYTES-T; ZETA-CHAIN; B-CELLS; PROTEIN; ACTIVATION; PHOSPHORYLATION; KINASE; TRANSDUCTION; STIMULATION AB T cells that lack the CD45 transmembrane tyrosine phosphatase have a variety of T-cell receptor (TCR) signaling defects that are corrected by reexpression of wild-type CD45 or its intracytoplasmic domains. In this study, a chimeric molecule containing the myristylation sequence of Src and the intracellular portion of CD45, previously shown to restore function in CD45(-) T cells, was mutagenized to determine if membrane-associated CD45 tyrosine phosphatase activity is required to restore TCR-mediated signaling in CD45(-) T cells. Abolition of enzymatic activity by substitution of a serine for a critical cysteine in the first catalytic domain resulted in failure of this molecule to restore TCR signaling. Another mutation, in which a single amino acid substitution destroyed the myristylation site, resulted in failure of the chimeric molecule to partition to the plasma membrane. Although expressed at high levels and enzymatically active, this form of intracellular CD45 also failed to restore normal signaling in CD45(-) T cells. These findings strongly suggest that CD45's function in TCR signaling requires its proximity to membrane-associated tyrosine phosphatase substrates. C1 NCI,IMMUNE CELL BIOL LAB,BIOL RESPONSE MODIFIERS PROGRAM,BETHESDA,MD 20892. USN,MED RES INST,IMMUNE CELL BIOL PROGRAM,BETHESDA,MD 20889. NR 44 TC 13 Z9 13 U1 0 U2 0 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0270-7306 J9 MOL CELL BIOL JI Mol. Cell. Biol. PD DEC PY 1994 VL 14 IS 12 BP 8078 EP 8084 PG 7 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA PV674 UT WOS:A1994PV67400037 PM 7526153 ER PT J AU YAO, RJ BURR, DH DOIG, P TRUST, TJ NIU, HY GUERRY, P AF YAO, RJ BURR, DH DOIG, P TRUST, TJ NIU, HY GUERRY, P TI ISOLATION OF MOTILE AND NONMOTILE INSERTIONAL MUTANTS OF CAMPYLOBACTER-JEJUNI - THE ROLE OF MOTILITY IN ADHERENCE AND INVASION OF EUKARYOTIC CELLS SO MOLECULAR MICROBIOLOGY LA English DT Article ID FLAGELLIN GENES; ANTIGENIC VARIATION; SURFACE-PROTEINS; ESCHERICHIA-COLI; HELA-CELLS; MEMBRANE; IDENTIFICATION; MUTAGENESIS; ADHESION; INTERNALIZATION AB A method of insertional mutagenesis for naturally transformable organisms has been adapted from Haemophilus influenzae and applied to the study of the pathogenesis of Campylobacter jejuni. A series of kanamycin-resistant insertional mutants of C. jejuni 81-176 has been generated and screened for loss of ability to invade INT407 cells. Eight noninvasive mutants were identified which showed 18-200-fold reductions in the level of invasion compared with the parent. Three of these eight show defects in motility, and five are fully motile. The three mutants with motility defects were further characterized to evaluate the method. One mutant, K2-32, which is non-adherent and non-invasive, has an insertion of the kanamycin-resistance cassette into the flaA flagellin gene and has greatly reduced motility and a truncated flagellar filament typical of flaA mutants, The adherent non-invasive mutants K2-37 and K2-55 are phenotypically paralysed, i.e. they have a full-length flagellar filament but are non-motile. All three mutants show an aberration in flagellar structure at the point at which the filament attaches to the cell. Mutants K2-37 and K2-55 represent overlapping deletions affecting the same gene, termed pflA (paralysed flagella), This gene encodes a predicted protein of 788 amino acid residues and a molecular weight of 90977 with no significant homology to known proteins. Site-specific insertional mutants into this open reading frame result in the same paralysed flagellar phenotype and the same invasion defects as the original mutants. The differences in adherence between the two classes of flagellar mutant suggest that flagellin can serve as a secondary adhesion, although other adhesins mediate a motility-dependent internalization process. Characterization of the mutants at the molecular level and in animal models should further contribute to our understanding of the pathogenicity of these organisms. C1 USN,MED RES INST ANNEX,ENTER DIS PROGRAM,ROCKVILLE,MD 20852. UNIV VICTORIA,DEPT BIOCHEM & MICROBIOL,VICTORIA,BC V8W 3P6,CANADA. US FDA,WASHINGTON,DC 20204. NR 41 TC 164 Z9 167 U1 3 U2 10 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0950-382X J9 MOL MICROBIOL JI Mol. Microbiol. PD DEC PY 1994 VL 14 IS 5 BP 883 EP 893 DI 10.1111/j.1365-2958.1994.tb01324.x PG 11 WC Biochemistry & Molecular Biology; Microbiology SC Biochemistry & Molecular Biology; Microbiology GA PY760 UT WOS:A1994PY76000005 PM 7715450 ER PT J AU WASHBURN, A AF WASHBURN, A TI ENERGY-CONSTRAINED PURSUIT IN A FLUID SO NAVAL RESEARCH LOGISTICS LA English DT Article AB A pursuer (P) pursues an evader (E), with each party choosing a speed in ignorance of the other's choice. Going extremely fast is pot wise for either party because doing so would quickly exhaust available energy. The situation is modeled as a two-person zero-sum game. The game may or may not have a saddle point, depending on the energy ratio and tactical parameters. (C) 1994 John Wiley & Sons, Inc. RP WASHBURN, A (reprint author), USN,POSTGRAD SCH,MONTEREY,CA 93943, USA. NR 2 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 DEC PY 1994 VL 41 IS 7 BP 935 EP 943 PG 9 WC Operations Research & Management Science SC Operations Research & Management Science GA PT394 UT WOS:A1994PT39400005 ER PT J AU CHANCE, PF LENSCH, MW LIPE, H BROWN, RH BROWN, RH BIRD, TD AF CHANCE, PF LENSCH, MW LIPE, H BROWN, RH BROWN, RH BIRD, TD TI HEREDITARY NEURALGIC AMYOTROPHY AND HEREDITARY NEUROPATHY WITH LIABILITY TO PRESSURE PALSIES - 2 DISTINCT GENETIC-DISORDERS SO NEUROLOGY LA English DT Article ID TOOTH DISEASE TYPE-1A; BRACHIAL-PLEXUS NEUROPATHY; TOMACULOUS NEUROPATHY; DUPLICATION AB Hereditary neuralgic amyotrophy with predilection for the brachial plexus (HNA) and hereditary neuropathy with liability to pressure palsies (HNPP) are autosomal dominant disorders associated with episodic, recurrent brachial neuropathies. HNPP is associated with a deletion or abnormal structure of the PMP22 gene on chromosome 17p11.2-12. The genetic locus for HNA is unknown. To address the possibility that HNPP and HNA might be identical disorders or allelic variations at the same locus, we investigated three HNA pedigrees with markers from the HNPP region. We did not find the 17p11.2-12 deletion associated with HNPP, nor an abnormality in PMP22 structure with HNA. This analysis provides genetic evidence, in addition to that suggested by the clinical, electrophysiologic, and pathologic differences, that HNA and HNPP are distinct disorders. C1 UNIV PENN,SCH MED,DEPT NEUROL,PHILADELPHIA,PA 19104. UNIV PENN,SCH MED,DEPT PEDIAT,PHILADELPHIA,PA 19104. UNIV WASHINGTON,SCH MED,DEPT MED,DIV NEUROL,SEATTLE,WA 98195. UNIV WASHINGTON,SCH MED,DEPT MED,DIV MED GENET,SEATTLE,WA 98195. VET ADM MED CTR,SEATTLE,WA 98108. USN,MED CORPS,BOSTON,MA. MASSACHUSETTS GEN HOSP EAST,NEUROMUSCULAR RES LAB,BOSTON,MA. HARVARD UNIV,SCH MED,BOSTON,MA. RP CHANCE, PF (reprint author), UNIV PENN,DIV NEUROL RES,ROOM 6138,34TH & CIVIC CTR BLVD,PHILADELPHIA,PA 19104, USA. NR 27 TC 40 Z9 41 U1 0 U2 0 PU LITTLE BROWN CO PI BOSTON PA 34 BEACON STREET, BOSTON, MA 02108-1493 SN 0028-3878 J9 NEUROLOGY JI Neurology PD DEC PY 1994 VL 44 IS 12 BP 2253 EP 2257 PG 5 WC Clinical Neurology SC Neurosciences & Neurology GA PW548 UT WOS:A1994PW54800007 PM 7991108 ER PT J AU ACKERMAN, JR LEBOW, PS AF ACKERMAN, JR LEBOW, PS TI OPTIMIZATION OF THE FIELD-OF-VIEW OF A BRILLOUIN-ENHANCED 4-WAVE-MIXING PHASE CONJUGATOR SO OPTICS LETTERS LA English DT Article ID PHOTOREFRACTIVE BATIO3; FREQUENCY; INSTABILITY; SCATTERING AB A BrilIouin-enhanced four-wave mixing phase conjugator featuring a field of view that varies by approximately an order of magnitude, i.e., from 2 to 20 mrad, is described. We control this variable field of view by utilizing a slightly noncollinear pumping geometry and by adjusting the pump-pump frequency difference to optimize the phase mismatch for the overall process. A model that describes the interplay between frequency and geometry to the Brillouin-enhanced four-wave-mixing phase mismatch is found to predict the expandable field of view. C1 USN,RES LAB,WASHINGTON,DC 20375. RP ACKERMAN, JR (reprint author), SFA INC,LANDOVER,MD 20785, USA. NR 9 TC 4 Z9 4 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD DEC 1 PY 1994 VL 19 IS 23 BP 2015 EP 2017 DI 10.1364/OL.19.002015 PG 3 WC Optics SC Optics GA PU974 UT WOS:A1994PU97400033 PM 19855727 ER PT J AU ZHANG, Q BROWN, DA REINHART, L MORSE, TF AF ZHANG, Q BROWN, DA REINHART, L MORSE, TF TI SIMPLE PRISM-BASED SCHEME FOR FABRICATING BRAGG GRATINGS IN OPTICAL FIBERS SO OPTICS LETTERS LA English DT Article ID SINGLE EXCIMER PULSE; PHOTOSENSITIVE FIBER AB A modified prism-based method for fabricating Bragg gratings in optical fibers is introduced. We have made an optical fiber Bragg grating at 799.67 nm by using a 45 degrees right-angle prism and a frequency-doubled argon-ion laser at 244 nm. The advantage of this method is ease of alignment. C1 USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93943. RP ZHANG, Q (reprint author), BROWN UNIV,DIV ENGN,LIGHTWAVE TECHNOL LAB,PROVIDENCE,RI 02912, USA. NR 8 TC 12 Z9 12 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD DEC 1 PY 1994 VL 19 IS 23 BP 2030 EP 2032 DI 10.1364/OL.19.002030 PG 3 WC Optics SC Optics GA PU974 UT WOS:A1994PU97400038 PM 19855732 ER PT J AU OLEARY, MJ MARTIN, PJ HAYDEN, RE AF OLEARY, MJ MARTIN, PJ HAYDEN, RE TI THE NEUROCUTANEOUS FREE FIBULA FLAP IN MANDIBULAR RECONSTRUCTION SO OTOLARYNGOLOGIC CLINICS OF NORTH AMERICA LA English DT Article AB Introduced two decades ago, the free fibula flap has only recently been applied to reconstruction of the segmental mandibular defect. Hayden's description of a neurosensory capability combined with enough bone to reconstruct an entire mandible with potential for osseointegration offers excellent functional rehabilitation. Together, with minimal donor site morbidity and the advantages of simultaneous, two-team surgery, the neurocutaneous free fibula has become our ''workhorse'' flap for optimal reconstruction of challenging oromandibular defects. C1 UNIFORMED SERV UNIV HLTH SCI,BETHESDA,MD. UNIV PENN,SCH MED,CTR HEAD & NECK CANC,PHILADELPHIA,PA 19104. RP OLEARY, MJ (reprint author), USN,CTR MED,DEPT CLIN INVEST,34800 BOB WILSON DR,SAN DIEGO,CA 92134, USA. NR 19 TC 30 Z9 37 U1 0 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0030-6665 J9 OTOLARYNG CLIN N AM JI Otolaryngol. Clin. N. Am. PD DEC PY 1994 VL 27 IS 6 BP 1081 EP 1096 PG 16 WC Otorhinolaryngology SC Otorhinolaryngology GA PY237 UT WOS:A1994PY23700006 PM 7885692 ER PT J AU MARTIN, PJ OLEARY, MJ HAYDEN, RE AF MARTIN, PJ OLEARY, MJ HAYDEN, RE TI FREE TISSUE TRANSFER IN OROMANDIBULAR RECONSTRUCTION - NECESSITY OR EXTRAVAGANCE SO OTOLARYNGOLOGIC CLINICS OF NORTH AMERICA LA English DT Article ID VASCULARIZED BONE-GRAFTS; MANDIBULAR RECONSTRUCTION; AUTOGENOUS BONE; FLAP; DEFECT; HEAD; NECK AB The challenges of oromandibular reconstruction have spawned tremendous progress and controversy in recent years. Foremost has been the development of free-tissue transfer. The selection of autogenous composite grafts whose volume and features closely approximate those of the ablative defect seems attractive, but are free flaps for everybody? This article defines the goals of the elusive ''ideal'' oromandibular restorative technique and compares the numerous options available to today's surgeon. C1 UNIFORMED SERV UNIV HLTH SCI,BETHESDA,MD. UNIV PENN,SCH MED,PHILADELPHIA,PA 19104. RP MARTIN, PJ (reprint author), USN,MED CTR,DEPT CLIN INVEST,34800 BOB WILSON DR,SAN DIEGO,CA 92134, USA. NR 34 TC 7 Z9 9 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0030-6665 J9 OTOLARYNG CLIN N AM JI Otolaryngol. Clin. N. Am. PD DEC PY 1994 VL 27 IS 6 BP 1141 EP 1150 PG 10 WC Otorhinolaryngology SC Otorhinolaryngology GA PY237 UT WOS:A1994PY23700009 PM 7885695 ER PT J AU OBRIEN, F HAMMEL, SE NGUYEN, CT AF OBRIEN, F HAMMEL, SE NGUYEN, CT TI THE MOI FORMULA FOR IMPROPER EXPONENTIAL DEFINITE INTEGRALS SO PERCEPTUAL AND MOTOR SKILLS LA English DT Article AB A general formula is developed for solving a type of improper exponential definite integral of order n in the number plane. Termed the Moi Formula, it is shown to produce substantially simpler derivations of the finite moments of a probability distribution employed for assessing stochastic randomness, such as recently published by the authors. Other applications of the integral formula are discussed. RP OBRIEN, F (reprint author), USN,CTR UNDERSEA WARFARE,CODE 2211,B1171-1,1176 HOWELL ST,NEWPORT,RI 02841, USA. NR 7 TC 2 Z9 2 U1 0 U2 0 PU PERCEPTUAL MOTOR SKILLS PI MISSOULA PA PO BOX 9229, MISSOULA, MT 59807 SN 0031-5125 J9 PERCEPT MOTOR SKILL JI Percept. Mot. Skills PD DEC PY 1994 VL 79 IS 3 BP 1123 EP 1127 PN 1 PG 5 WC Psychology, Experimental SC Psychology GA PY314 UT WOS:A1994PY31400010 ER PT J AU OBRIEN, F HAMMEL, SE NGUYEN, CT AF OBRIEN, F HAMMEL, SE NGUYEN, CT TI A GENERAL EXPONENTIAL INTEGRAL FORMULA SO PERCEPTUAL AND MOTOR SKILLS LA English DT Article AB The authors' Poisson probability method for detecting stochastic randomness in three-dimensional space has resulted in the formal calculation of a useful class of exponential integrals. RP OBRIEN, F (reprint author), USN,DIV UNDERSEA WARFARE CTR,CODE 2211,B 1171-1,1176 HOWELL ST,NEWPORT,RI 02841, USA. NR 1 TC 2 Z9 2 U1 0 U2 0 PU PERCEPTUAL MOTOR SKILLS PI MISSOULA PA PO BOX 9229, MISSOULA, MT 59807 SN 0031-5125 J9 PERCEPT MOTOR SKILL JI Percept. Mot. Skills PD DEC PY 1994 VL 79 IS 3 BP 1645 EP 1646 PN 2 PG 2 WC Psychology, Experimental SC Psychology GA QE553 UT WOS:A1994QE55300042 ER PT J AU SALAMA, K LEE, DF PRESSWOOD, RG FRANCAVILLA, T AF SALAMA, K LEE, DF PRESSWOOD, RG FRANCAVILLA, T TI SEEDED DIRECTIONAL SOLIDIFICATION OF YBA2CU3OX SUPERCONDUCTORS SO PHYSICA C LA English DT Article ID CURRENT-DENSITY AB In order to utilize melt-textured YBa2Cu3Ox superconductors in conductor applications, both the size of the oriented domains and the alignment of the grains have to be improved A seeded directional solidification method has been developed to accomplish this goal. Due to the presence of the seed, single-domained bulk samples with preferential grain alignment have been obtained. Since the plate-shaped grains are aligned along the sample axis, the current capacity of these seeded superconductors are found to be insensitive to thermal cycling. In addition, the magnetic field dependency of critical current density in these long seeded superconductors is found to be in excellent agreement with that of well-textured short specimens. C1 UNIV HOUSTON,TEXAS CTR SUPERCONDUCT,HOUSTON,TX 77204. USN,RES LAB,WASHINGTON,DC 20375. RP SALAMA, K (reprint author), UNIV HOUSTON,DEPT MECH ENGN,HOUSTON,TX 77204, USA. NR 11 TC 9 Z9 9 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 DEC PY 1994 VL 235 BP 213 EP 216 DI 10.1016/0921-4534(94)91351-X PN 1 PG 4 WC Physics, Applied SC Physics GA QA390 UT WOS:A1994QA39000057 ER PT J AU KENDZIORA, C ROSENBERG, A AF KENDZIORA, C ROSENBERG, A TI RAMAN-SPECTROSCOPY OF BI2SR2CACU2O8+DELTA WITH VARYING OXYGEN STOICHIOMETRY SO PHYSICA C LA English DT Article; Proceedings Paper CT International Conference on Materials and Mechanisms of Superconductivity - High Temperature Superconductors IV (M2S-HTSC IV) CY JUL 05-09, 1994 CL GRENOBLE, FRANCE SP EUROPEAN COMMUNITY, MINIST EDUC & SCI, FRANCE, CNRS, FRENCH NATL CTR SCI RES, RHONE ALPES REG, CITY GRENOBLE AB Measurements of Raman scattering from the electronic continuum are reported for crystals of the cuprate superconductor Bi2Sr2CaCu2O8+delta (Bi 2212) post-annealed at both high and low oxygen partial pressures to adjust T-c. For temperatures below T-c, a peak forms in the continuum at an energy shift which depends upon the polarizations of the incident and collected light as well as oxygen concentration. The results are discussed in terms of an anisotropic superconducting energy gap. RP KENDZIORA, C (reprint author), USN,RES LAB,DIRECTED ENERGY EFFECTS BRANCH,CODE 6650,WASHINGTON,DC 20375, USA. NR 5 TC 3 Z9 3 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 DEC PY 1994 VL 235 BP 1121 EP 1122 DI 10.1016/0921-4534(94)91785-X PN 2 PG 2 WC Physics, Applied SC Physics GA QC694 UT WOS:A1994QC69400200 ER PT J AU BLACKSTEAD, HA CHRISEY, DB DOW, JD HORWITZ, JS KLUNZINGER, AE PULLING, DB AF BLACKSTEAD, HA CHRISEY, DB DOW, JD HORWITZ, JS KLUNZINGER, AE PULLING, DB TI EVIDENCE OF SUPERCONDUCTIVITY IN PRBA2CU3O7 SO PHYSICA C LA English DT Article; Proceedings Paper CT International Conference on Materials and Mechanisms of Superconductivity - High Temperature Superconductors IV (M2S-HTSC IV) CY JUL 05-09, 1994 CL GRENOBLE, FRANCE SP EUROPEAN COMMUNITY, MINIST EDUC & SCI, FRANCE, CNRS, FRENCH NATL CTR SCI RES, RHONE ALPES REG, CITY GRENOBLE AB The surface resistances of PrBa2Cu3O7 films provide evidence of patches of superconductivity with transition temperatures of approximate to 92 K. The same samples have insulating de resistivities. We interpret this as evidence that PrBa2Cu3O7 is intrinsically superconducting, but contains Ba-site Pr ions that break pairs and destroy macroscopic superconductivity. The theoretical implications are discussed. C1 USN,RES LAB,WASHINGTON,DC 20375. ARIZONA STATE UNIV,DEPT PHYS,TEMPE,AZ 85287. RP BLACKSTEAD, HA (reprint author), UNIV NOTRE DAME,DEPT PHYS,NOTRE DAME,IN 46556, USA. NR 7 TC 50 Z9 50 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD DEC PY 1994 VL 235 BP 1539 EP 1540 DI 10.1016/0921-4534(94)91994-1 PN 2 PG 2 WC Physics, Applied SC Physics GA QC694 UT WOS:A1994QC69400409 ER PT J AU HASS, N COVINGTON, M FELDMANN, WL GREENE, LH JOHNSON, M AF HASS, N COVINGTON, M FELDMANN, WL GREENE, LH JOHNSON, M TI TRANSPORT-PROPERTIES OF YBA2CU3O7-DELTA FERROMAGNETIC INTERFACES SO PHYSICA C LA English DT Article ID SPIN; YBA2CU3O7; FILMS AB The transport properties of YBa2Cu3O7-delta/permalloy interfaces as a function of temperature and small magnetic fields are presented. High quality (001) and (100) oriented YBa2Cu3O7-delta (YBCO) thin films are prepared by the off-axis sputtering technique. Permalloy (Ni0.8Fe0.2) films are then deposited on top of the YBCO films, and patterned in order to obtain sub-millimeter contacts. The interface resistances in the normal and superconducting state of the YBCO are measured as a function of an applied magnetic field. The results are discussed in the framework of electron spin transport across the interface and spin diffusion in the bulk of the superconductor. C1 UNIV ILLINOIS,SCI & TECHNOL CTR SUPERCONDUCT,URBANA,IL 61801. USN,RES LABS,WASHINGTON,DC 20375. RP HASS, N (reprint author), UNIV ILLINOIS,DEPT PHYS,1110 W GREEN ST,URBANA,IL 61801, USA. NR 7 TC 9 Z9 9 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD DEC PY 1994 VL 235 BP 1905 EP 1906 DI 10.1016/0921-4534(94)92174-1 PN 3 PG 2 WC Physics, Applied SC Physics GA QC695 UT WOS:A1994QC69500182 ER PT J AU WEHLER, D MULLER, G MUREK, C PIEL, H SCHONMANN, K WOLF, T WOLF, SA AF WEHLER, D MULLER, G MUREK, C PIEL, H SCHONMANN, K WOLF, T WOLF, SA TI ANISOTROPIC MICROWAVE LOSSES OF PARTIALLY UNTWINNED YBA2CU3O7-X SINGLE-CRYSTALS SO PHYSICA C LA English DT Article AB We have built up a highly sensitive system to measure the temperature-dependent anisotropy of the microwave losses of HTSC crystals. By rotating a crystal in the microwave field of a 21 GHz cylindrical Nb resonator the relative amount of surface currents into the different crystal directions can be varied. The lowest surface resistance of 150 mu Omega at 50K and resistivity of 39 mu Omega cm at 100K have been obtained for a 40 mu m thin twinned YBa2Cu3O7-x (YBCO) crystal. Preliminary measurements on two partially untwinned YBCO crystals have confirmed the much reduced conductivity in c-direction and the improved one in chain (b)-direction, both in the normal state. In contrast, enlarged losses have been obtained below T-c in chain direction, suggesting a weakened superconductivity in the chains of the YBCO crystals. C1 WALTHER MEISSNER INST TIEFTEMP FORSCH,D-85748 GARCHING,GERMANY. KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,INST TECH PHYS,D-67021 KARLSRUHE,GERMANY. USN,RES LAB,WASHINGTON,DC 20375. RP WEHLER, D (reprint author), BERG UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,D-42097 WUPPERTAL,GERMANY. RI Wolf, Stuart/A-7513-2009 NR 7 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD DEC PY 1994 VL 235 BP 2003 EP 2004 DI 10.1016/0921-4534(94)92223-3 PN 3 PG 2 WC Physics, Applied SC Physics GA QC695 UT WOS:A1994QC69500231 ER PT J AU SINGH, DJ PICKETT, WE AF SINGH, DJ PICKETT, WE TI ELECTRONIC-STRUCTURE STUDIES OF DOPED AND UNDOPED HG-BA-CA-CU-O SO PHYSICA C LA English DT Article ID SUPERCONDUCTIVITY; HGBA2CUO4+DELTA AB LDA calculations of the electronic structure of HgBa2CuO4, HgBa2Ca2Cu3O8 and HgBa2Cu2Cu3O8.5 are reported. Tn the absence of Hg-layer O, the bands near the Fermi energy (E(F)) are the Cu-O dp sigma* antibonding band, characteristic of the high-T-c cuprates, and a Hg 6p derived band which lies entirely above E(F) in HgBa2,CuO, although approaching E(F) along the X-R line; in HgBa2Ca2Cu3O8 this band slightly crosses E(F) leading to a small self-doping Hg-layer O, strongly modifies this picture. The Hg 6p related structure is pushed high above E(F). Instead, substantial hybridization is found between Hg-layer O 2p and Hg 5d states. This causes some of these states to be unoccupied. as a result each excess O contributes approximately one hole to the CuO2 planes rather than the two holes expected from ionic considerations. The three CuO2 bands near E(F) become almost coincident, which may have important implications for superconductivity. RP SINGH, DJ (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. RI Singh, David/I-2416-2012 NR 9 TC 5 Z9 5 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 DEC PY 1994 VL 235 BP 2113 EP 2114 DI 10.1016/0921-4534(94)92277-2 PN 3 PG 2 WC Physics, Applied SC Physics GA QC695 UT WOS:A1994QC69500285 ER PT J AU WOLF, SA KRESIN, VZ AF WOLF, SA KRESIN, VZ TI SYMMETRY OF THE PAIRING, ISOTOPE EFFECT AND MECHANISM OF SUPERCONDUCTIVITY IN THE CUPRATES SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article; Proceedings Paper CT International Conference on Materials and Mechanisms of Superconductivity - High Temperature Superconductors IV (M2S-HTSC IV) CY JUL 05-09, 1994 CL GRENOBLE, FRANCE SP EUROPEAN COMMUNITY, MINIST EDUC & SCI, FRANCE, CNRS, FRENCH NATL CTR SCI RES, RHONE ALPES REG, CITY GRENOBLE ID TEMPERATURE-DEPENDENCE; YBA2CU3O7-DELTA; STATE AB This article will briefly discuss the symmetry of the pairing, the isotope effect and the strong coupling of the carriers to the optical phonon modes which is strong enough to provide high T-C. C1 ADV RES PROJECT AGCY,DEF SCI OFF,ARLINGTON,VA 22203. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP WOLF, SA (reprint author), USN,RES LAB,MAT PHYS BRANCH,WASHINGTON,DC 20375, USA. RI Wolf, Stuart/A-7513-2009 NR 15 TC 0 Z9 0 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 DEC PY 1994 VL 235 BP 2413 EP 2414 DI 10.1016/0921-4534(94)92427-9 PN 4 PG 2 WC Physics, Applied SC Physics GA QC696 UT WOS:A1994QC69600132 ER PT J AU Liebenberg, DH McIntyre, PC Cima, MJ Francavilla, TL AF Liebenberg, D. H. McIntyre, P. C. Cima, M. J. Francavilla, T. L. TI Critical Current Angle-Dependent Measurements of Thin (15nm) Chemically-Derived YBa2Cu3O7-d Films in Fields to 5.5 T SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article AB Critical current measurements were made using films of YBa2Cu3O7-d prepared by a metalorganic process. The film thickness was purposely reduced to about 15 nm so that measurements of the critical current could be made at temperatures of 4.2 K with reasonable width. Magnetic fields to 5.53 T were applied parallel to the film plane and as a function of angle from that plane. The current and applied field were always orthogonal. Comparison with measurements at 77 K show that at low fields, 0.5 T, the peak in critical current near H//a,b is broadened at the lower temperature. Increasing fields tend to sharpen the peak more rapidly at 4 K. Measurements with H//c show a decrease by a factor of 4 at 5.5 T and did not change during a second thermal cycle between room temperature and 4.2 K. The power law exponents were determined from the I-V data ranging from 1-150 mu V. C1 [Liebenberg, D. H.] Off Naval Res, Arlington, VA 22217 USA. [McIntyre, P. C.; Cima, M. J.] MIT, Cambridge, MA 02139 USA. [Francavilla, T. L.] Naval Res Lab, Washington, DC USA. RP Liebenberg, DH (reprint author), Off Naval Res, 800 N Quincy St, Arlington, VA 22217 USA. FU Office of Naval Research FX One of us (D.H.L.) acknowledges support of the Scientific Officer Research Program at the Office of Naval Research. NR 5 TC 0 Z9 0 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 DEC PY 1994 VL 235-40 BP 3069 EP 3070 DI 10.1016/0921-4534(94)91061-8 PN 5 PG 2 WC Physics, Applied SC Physics GA V23ZX UT WOS:000208381800127 ER PT J AU Fuller-Mora, WW Soulen, RJ Miller, MM Francavilla, TL AF Fuller-Mora, W. W. Soulen, R. J., Jr. Miller, M. M. Francavilla, T. L. TI A New Definition of the Critical Current in Low T-c Superconductors Based on the Ambegaokar-Halperin Model SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article AB We report on a new way to determine I-c for low temperature superconductors. We have analyzed a series of I-V curves taken at 4.2 K in magnetic fields from 0 to 10 Tesla. Our results on multifilamentary NbTi wire in an Al matrix are used to illustrate this technique. The I-V curves are analyzed using a model based on the Ambegaokar-Halperin equation for a single Josephson junction. The critical current defined in this fashion is larger than that defined from the traditional E-field criterion. C1 [Fuller-Mora, W. W.; Soulen, R. J., Jr.; Miller, M. M.; Francavilla, T. L.] USN, Res Lab, Washington, DC 20375 USA. RP Fuller-Mora, WW (reprint author), USN, Res Lab, Washington, DC 20375 USA. NR 3 TC 0 Z9 0 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 DEC PY 1994 VL 235-40 BP 3083 EP 3084 DI 10.1016/0921-4534(94)91068-5 PN 5 PG 2 WC Physics, Applied SC Physics GA V23ZX UT WOS:000208381800134 ER PT J AU Rao, AS AF Rao, Appajosula S. TI Processing and property evaluation of aluminum matrix superconducting materials SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article AB The structure morphology and superconducting properties of 60 wt.% commercial aluminum / 40 wt.% YBa2Cu3O6+x composites were investigated as a function of processing parameters. It was found that the resistivity versus temperature profile of these composites was that of a superconductor. In addition to a superconducting transition temperature around 90 K, an additional partial transition around 120 K was noted. C1 USN, Carderock Div, Ctr Surface Warfare, Annapolis, MD 21402 USA. RP Rao, AS (reprint author), USN, Carderock Div, Ctr Surface Warfare, Code 612, Annapolis, MD 21402 USA. NR 2 TC 1 Z9 1 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 DEC PY 1994 VL 235-40 BP 3437 EP 3438 DI 10.1016/0921-4534(94)91245-9 PN 5 PG 2 WC Physics, Applied SC Physics GA V23ZX UT WOS:000208381800311 ER PT J AU PULSIFER, PE WHITNEY, KG AF PULSIFER, PE WHITNEY, KG TI FOKKER-PLANCK ANALYSIS OF SHORT-PULSE LASER-HEATING IN THE HOT-SPOT MODEL APPROXIMATION SO PHYSICAL REVIEW E LA English DT Article ID FIELD-INDUCED IONIZATION; INVERSE BREMSSTRAHLUNG; ELECTRON DISTRIBUTIONS; PLASMA INTERACTIONS; ABSORPTION; TRANSPORT RP PULSIFER, PE (reprint author), USN,RES LAB,DIV PLASMA PHYS,RADIAT HYDRODYNAM BRANCH,WASHINGTON,DC 20375, USA. NR 30 TC 4 Z9 4 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 DEC PY 1994 VL 50 IS 6 BP 4926 EP 4936 DI 10.1103/PhysRevE.50.4926 PG 11 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA QA108 UT WOS:A1994QA10800073 ER PT J AU UHM, HS CHOI, EH CHO, GS KANG, SO AF UHM, HS CHOI, EH CHO, GS KANG, SO TI SHIFT OF PEAK ENERGY-DISTRIBUTION IN FIELD-EMITTED CHARGED-PARTICLE BEAMS SO PHYSICS OF PLASMAS LA English DT Article C1 KWANGWOON UNIV,DEPT PHYS,SEOUL 139701,SOUTH KOREA. RP UHM, HS (reprint author), USN,CTR SURFACE WARFARE,10901 NEW HAMPSHIRE AVE,SILVER SPRING,MD 20903, USA. NR 6 TC 11 Z9 11 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD DEC PY 1994 VL 1 IS 12 BP 4105 EP 4113 DI 10.1063/1.870820 PG 9 WC Physics, Fluids & Plasmas SC Physics GA PV949 UT WOS:A1994PV94900042 ER PT J AU ARMISTEAD, JP SNOW, AW AF ARMISTEAD, JP SNOW, AW TI FIBER-MATRIX LOAD-TRANSFER IN CYANATE RESIN CARBON-FIBER SYSTEMS SO POLYMER COMPOSITES LA English DT Article ID INTERFACIAL SHEAR-STRENGTH; MECHANICAL-PROPERTIES; STRESS TRANSFER; MATRIX; COMPOSITES; INTERPHASE; DEPENDENCE; ADHESION; LENGTH AB Comparative single fiber fragmentation test measurements are used to characterize cyanate and epoxy resin interface load transfer with high modulus (HMS4) and high strength (AS4) carbon fibers. The HMS4 fiber forms a weak interface with a fiber controlled failure mode, and the AS4 fiber forms a strong interface with the resin properties, apparently determining the level of load transfer. The resin properties examined are critical surface energy for wetting, cure shrinkage, thermal shrinkage, and mechanical modulus and strength. The cyanate and epoxy resins display no significant difference in critical surface energy. Cure shrinkage has a negligible effect on load transfer. The compressive force from thermal shrinkage is significant, but the larger Tg to testing temperature range of the cyanate resin is offset by the larger thermal expansion coefficient of the epoxy, resulting in a near equal compressive force for the two resins. There is little difference in modulus between the two resins but a significant difference in shear strength. This difference is reflected in the larger load transfer measurement for the cyanate resin. A comparison of simple one-dimensional elastic and plastic models for the fiber fragmentation experiment resulted in better conformity with the plastic model. This would indicate that interfacial failure occurs by plastic deformation of the resin for the systems of this study. RP ARMISTEAD, JP (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 32 TC 3 Z9 3 U1 2 U2 3 PU SOC PLASTICS ENG INC PI BROOKFIELD CENTER PA 14 FAIRFIELD DR, BROOKFIELD CENTER, CT 06804-0403 SN 0272-8397 J9 POLYM COMPOSITE JI Polym. Compos. PD DEC PY 1994 VL 15 IS 6 BP 385 EP 392 DI 10.1002/pc.750150602 PG 8 WC Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA PY396 UT WOS:A1994PY39600001 ER PT J AU DALESANDRO, MM MALIK, M REED, HL HORNER, LD AF DALESANDRO, MM MALIK, M REED, HL HORNER, LD TI CHANGES IN TRIIODOTHYRONINE (T-3) MONONUCLEAR LEUKOCYTE RECEPTOR KINETICS AFTER T-3 ADMINISTRATION AND MULTIPLE COLD-AIR EXPOSURES SO RECEPTOR LA English DT Article DE MONONUCLEAR BLOOD CELLS; TRIIODOTHYRONINE; THYROXINE; NUCLEAR T-3 RECEPTORS; COLD HABITUATION ID PROLONGED ANTARCTIC RESIDENCE; THYROID-HORMONE RECEPTORS; TRI-IODOTHYRONINE; NUCLEAR RECEPTORS; HUMAN-LYMPHOCYTES; HYPOTHYROID RATS; BLOOD-CELLS; BINDING; T3; THYROXINE AB Repeated cold-air exposures increase human triiodothyronine (T-3) plasma clearance rates. To study the response of the nuclear T-3 receptor (NT3R) in this condition, binding characteristics were analyzed in human mononuclear leukocytes (MNL). In addition, we supplemented one group of individuals with a daily oral replacement dose of T-3 to isolate the influence of serum thyroxine (T-4) and thyrotropin (TSH) levels on receptor kinetics. The subjects were exposed to cold air (4 degrees C) twice/d, 30 min/exposure, for a total of 80 exposures. The T-3-subjects received placebo [n = 8] and the T-3+ subjects received T-3 (30 mu g/d) [n = 8] in a double-blind fashion. Mononuclear leukocytes were isolated from peripheral blood before the cold exposure and drug regimen began, and then after every 20 exposures. The dissociation constant (K-d) and maximum binding capacity (MBC) of the NT3R values were log transformed to minimize between-subject variability. In the T-3+ group, serum total thyroxine (TT4), free T-4 (FT4), and TSH were approx 50% lower than both basal and T-3- values. The log(10)K(d) increased 0.304 +/- 0.139 (p < 0.04) and the log(10)MBC increased 0.49 +/- 0.10 (p < 0.001) in the T-3+ subjects compared to baseline. This change in MBC represents a 311% increase in the MBC over baseline and a fivefold increase over placebo-treated subjects. The T-3- group showed no change in MBC over the study. These results describe for the first time the rapid modulation of the NT3R in response to the combined influence of cold exposure and reduced circulating T-4 and TSH. RP DALESANDRO, MM (reprint author), USN,MED RES INST,BETHESDA,MD 20889, USA. NR 35 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07012 SN 1052-8040 J9 RECEPTOR JI Receptor PD WIN PY 1994 VL 4 IS 4 BP 259 EP 268 PG 10 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA QA835 UT WOS:A1994QA83500005 PM 7894340 ER PT J AU KIMES, DS HARRISON, PA HARRISON, PR AF KIMES, DS HARRISON, PA HARRISON, PR TI EXTENSION OF OFF-NADIR VIEW ANGLES FOR DIRECTIONAL SENSOR SYSTEMS SO REMOTE SENSING OF ENVIRONMENT LA English DT Article ID REFLECTANCE FACTOR DISTRIBUTIONS; RADIOMETER AB A knowledge-based system called VEG mns expanded to infer nadir or any off-nadir reflectance(s) of a vegetation target given any combination of other directional reflectance(s) of the target. VEG determines the best techniques to use in an array of techniques, applies the techniques to the target data, and provides a rigorous estimate of the accuracy of the inference(s). The knowledge-based system, VEG, facilitates the use of diverse knowledge bases to be incorporated into the inference techniques. In this study, VEG used additional information to make more accurate view-angle extension techniques than the traditional techniques that only use spectral data from the unknown target. VEG used spectral data and a normalized difference technique to infer the percentage of ground cover of the unknown target. This estimate of percentage of ground cover of the unknown target along with information on the sun angle were then used to search a historical data base for targets that match the unknown target in these characteristics. This data captured the general shape of the reflectance distribution of the unknown target. This historical information was used to estimate the coefficients of the techniques for the conditions at hand and to test the accuracy of the techniques. The tests used in this study were difficult ones. For example, techniques were tested that make long angular extensions using one, two, or four input view angles to predict an unknown nadir value. Furthermore, a wide variety of unknown targets were tested. The errors (+/- proportional rms) obtained were on the order of 0.15. In addition techniques were tested that use seven or nine multiple view angles to predict the entire hemispherical reflectance distribution of an unknown target. The accuracy of these tests was relatively good considering the relatively dynamic and noisy nature of directional reflectance distributions. The accuracy of the techniques in this study depends on the smoothness of the historical reflectance distributions and the amount of historical data available that closely matches the unknown target. C1 INTELLICORP,ARLINGTON,VA. USN ACAD,ANNAPOLIS,MD. RP KIMES, DS (reprint author), NASA,GODDARD SPACE FLIGHT CTR,BIOSPHER SCI BRANCH,CODE 923,GREENBELT,MD 20771, USA. NR 16 TC 8 Z9 8 U1 0 U2 1 PU ELSEVIER SCIENCE PUBL CO INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0034-4257 J9 REMOTE SENS ENVIRON JI Remote Sens. Environ. PD DEC PY 1994 VL 50 IS 3 BP 201 EP 211 DI 10.1016/0034-4257(94)90070-1 PG 11 WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic Technology SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science & Photographic Technology GA QB673 UT WOS:A1994QB67300001 ER PT J AU ESTEP, L ARNONE, R AF ESTEP, L ARNONE, R TI EFFECT OF WHITECAPS ON DETERMINATION OF CHLOROPHYLL CONCENTRATION FROM SATELLITE DATA SO REMOTE SENSING OF ENVIRONMENT LA English DT Article ID COASTAL; SURFACE; WATERS; OCEAN; MATTER; COLOR AB The effects of heightened sea state on the computation of chlorophyll concentration from satellite radiance data are modeled for Case 1 waters. Errors in estimating chlorophyll can result when increasing winds create an increasingly whitecapped air-sea interface. The resulting errors in estimating chlorophyll concentration are shown for a range of windspeeds of 0-25 m/s and for a range of chlorophyll concentrations of 0-20 mg/m(3). Model results are furnished for correcting remotely sensed chlorophyll for varying sea states provided that some estimate of surface wind fields is available. C1 USN,RES LAB,BAY ST LOUIS,MS. RP ESTEP, L (reprint author), USA,CORPS ENGINEERS,COASTAL ENGN RES CTR,VICKSBURG,MS 39180, USA. NR 24 TC 5 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE PUBL CO INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0034-4257 J9 REMOTE SENS ENVIRON JI Remote Sens. Environ. PD DEC PY 1994 VL 50 IS 3 BP 328 EP 334 DI 10.1016/0034-4257(94)90082-5 PG 7 WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic Technology SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science & Photographic Technology GA QB673 UT WOS:A1994QB67300013 ER PT J AU GOTO, M YOSHIOKA, T LICHTENBERG, R LEE, CH ZELLER, WP AF GOTO, M YOSHIOKA, T LICHTENBERG, R LEE, CH ZELLER, WP TI ANTI-LIPID A MONOCLONAL-ANTIBODIES AND ANTI-LPS ANTISERUM EFFECTS ON LIMULUS ACTIVITY OF LPS SO RESEARCH COMMUNICATIONS IN MOLECULAR PATHOLOGY AND PHARMACOLOGY LA English DT Article ID GRAM-NEGATIVE BACTEREMIA; SHOCK; ENDOTOXIN; TRIAL AB Anti-lipid A monoclonal antibodies (A78S1 and A523) and anti-LPS antiserum can decrease the mortality due to endotoxic shock in the newborn rat. However, in vitro LPS detoxification of anti-lipid A monoclonal antibodies is not known. Thus, we studied in vivo effects of A78S1 (IgG), A523 (IgM), and anti-LPS antiserum on Limulus activity. Anti-LPS antiserum decreased Limulus activity of S. enteritidis, E. coli and S. typhosa LPS. However, neither A78S1 nor A523 decreased the Limulus activity of E. coli and S. typhosa LPS. A78S1 or A523 incubation with S. enteritidis LPS at different doses (0.1 to 100 ng/ml) did not after the Limulus activity. Perchloric acid treatment after LPS incubation with A78S1 or A523 significantly decreased Limulus activity. Therefore, anti-lipid A monoclonal antibodies (A78S1 and A523) can bind LPS, but do not decrease Limulus activity. C1 LOYOLA UNIV, STRITCH SCH MED, DEPT PHYSIOL, MAYWOOD, IL 60153 USA. USN, MED RES INST, SEPT SHOCK RES PROGRAM, BETHESDA, MD 20889 USA. RP GOTO, M (reprint author), LOYOLA UNIV, STRITCH SCH MED, DEPT PEDIAT, MAYWOOD, IL 60153 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU P J D PUBLICATIONS LTD PI WESTBURY PA PO BOX 966, WESTBURY, NY 11590 USA SN 1078-0297 J9 RES COMMUN MOL PATH JI Res. Commun. Mol. Pathol. Pharmacol. PD DEC PY 1994 VL 86 IS 3 BP 341 EP 346 PG 6 WC Biochemistry & Molecular Biology; Pathology; Pharmacology & Pharmacy SC Biochemistry & Molecular Biology; Pathology; Pharmacology & Pharmacy GA PZ348 UT WOS:A1994PZ34800008 PM 7712110 ER PT J AU MATHEW, J AF MATHEW, J TI CROSSATRON-BASED MODULATOR FOR HIGH-REPETITION-RATE OPERATION WITH ARBITRARY PULSE WIDTHS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID PLASMA RP MATHEW, J (reprint author), USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375, USA. NR 8 TC 3 Z9 3 U1 0 U2 0 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 DEC PY 1994 VL 65 IS 12 BP 3756 EP 3760 DI 10.1063/1.1144502 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA PX392 UT WOS:A1994PX39200026 ER PT J AU CLARKE, JR AF CLARKE, JR TI DEVELOPING INTERNATIONAL STANDARDS FOR UBA TESTING SO SEA TECHNOLOGY LA English DT Article RP CLARKE, JR (reprint author), USN,EXPTL DIVING UNIT,PANAMA CITY,FL 32401, USA. NR 4 TC 0 Z9 0 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 DEC PY 1994 VL 35 IS 12 BP 35 EP & PG 0 WC Engineering, Ocean SC Engineering GA PY571 UT WOS:A1994PY57100005 ER PT J AU BALK, DM AF BALK, DM TI UNDERWATER CONSTRUCTION - US-NAVY SEABEE STYLE SO SEA TECHNOLOGY LA English DT Article RP BALK, DM (reprint author), USN,CONSTRUCT BATTAL TWO,CIVIL ENGINEER CORPS,PORT HUENEME,CA, USA. NR 0 TC 0 Z9 0 U1 1 U2 1 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 DEC PY 1994 VL 35 IS 12 BP 51 EP 53 PG 3 WC Engineering, Ocean SC Engineering GA PY571 UT WOS:A1994PY57100008 ER PT J AU KNESSL, C PETERS, CS AF KNESSL, C PETERS, CS TI EXACT AND ASYMPTOTIC SOLUTIONS FOR THE TIME-DEPENDENT PROBLEM OF COLLECTIVE RUIN .1. SO SIAM JOURNAL ON APPLIED MATHEMATICS LA English DT Article DE COLLECTIVE RUIN; RISK THEORY; ASYMPTOTICS AB The time-dependent problem of collective ruin concerns the fate of a risk business such as an insurance company. The classic model is given in terms of a risk reserve, Z(t), that increases according to a deterministic process (premiums) and decreases according to a compound Poisson process (claims). An integrodifferential backward Kolmogorov equation is derived for the probability of surviving through time t. Exact solutions for an exponential claims distribution are derived when the premiums are modeled as either constant over time, or linearly dependent on the size of the reserve. These complicated exact solutions are analyzed asymptotically for three fundamental regions in parameter space and for various regions in the (z,t) plane, where z = Z(0). This work seems to be the first which considers the time-dependent problem with nonconstant premiums. C1 USN,POSTGRAD SCH,DEPT MATH,MONTEREY,CA 93943. RP KNESSL, C (reprint author), UNIV ILLINOIS,DEPT MATH STAT & COMP SCI MC 249,851 S MORGAN ST,CHICAGO,IL 60607, USA. NR 16 TC 6 Z9 6 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0036-1399 J9 SIAM J APPL MATH JI SIAM J. Appl. Math. PD DEC PY 1994 VL 54 IS 6 BP 1745 EP 1767 DI 10.1137/S0036139993250579 PG 23 WC Mathematics, Applied SC Mathematics GA PT028 UT WOS:A1994PT02800011 ER PT J AU PRUNER, LZ AF PRUNER, LZ TI KINOGLASNOST - SOVIET CINEMA IN OUR TIME - LAWTON,A SO SLAVIC AND EAST EUROPEAN JOURNAL LA English DT Book Review RP PRUNER, LZ (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSN TEACHERS SLAVIC EAST EUROPEAN LANGUAGES PI TUCSON PA UNIV ARIZONA MODERN LANGUAGES BUILDING, TUCSON, AZ 85287 SN 0037-6752 J9 SLAVIC E EUR J JI Slavic East Eur. J. PD WIN PY 1994 VL 38 IS 4 BP 699 EP 701 DI 10.2307/308433 PG 3 WC Literature, Slavic SC Literature GA PX267 UT WOS:A1994PX26700020 ER PT J AU JOHNSON, CE AF JOHNSON, CE TI CHEMICAL POLISHING OF DIAMOND SO SURFACE & COATINGS TECHNOLOGY LA English DT Article ID CVD DIAMOND; DIFFUSIONAL REACTION; FILMS AB New chemical processes for etching diamond have been explored in order to find economical methods to shape and polish chemical vapor deposition diamond for optical applications. Chemical reagents with the potential for oxidizing or dissolving carbon were evaluated by contacting the reagent with diamond surfaces at 500-1000 degrees C. Molten lanthanum-nickel eutectic (melting point 480 degrees C) in bulk form exhibits a high activity for etching diamond. Etch rates of 78, 113, and 215 mu m h(-1) were observed at 700, 800 and 900 degrees C respectively. Although fast, the etching process can be non-uniform. The metals iron, nickel, cobalt, manganese, and palladium were found to etch diamond at 1-5 mu m h(-1) at 900-1000 degrees C, while other metals and metal oxides gave little or no etching of diamond. RP JOHNSON, CE (reprint author), USN, AIR WARFARE CTR WEAPONS DIV, RES DEPT, DIV CHEM, CHINA LAKE, CA 93555 USA. NR 25 TC 14 Z9 14 U1 0 U2 3 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD DEC PY 1994 VL 68 BP 374 EP 377 DI 10.1016/0257-8972(94)90188-0 PG 4 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA PW039 UT WOS:A1994PW03900061 ER PT J AU KOLESKE, DD GATES, SM THOMS, BD RUSSELL, JN BUTLER, JE AF KOLESKE, DD GATES, SM THOMS, BD RUSSELL, JN BUTLER, JE TI ISOTHERMAL DESORPTION OF HYDROGEN FROM POLYCRYSTALLINE DIAMOND FILMS SO SURFACE SCIENCE LA English DT Letter ID CHEMICAL-VAPOR-DEPOSITION; PI-BONDED DIMERS; THERMAL-DESORPTION; MONOHYDRIDE PHASE; SURFACE; KINETICS; SI(100); CHEMISORPTION; MECHANISM; POWDERS AB The kinetics of isothermal H-2 desorption from polycrystalline diamond are studied in real time. The surface H coverage (theta(H)) is measured by mass analyzing the recoiled H+ ion signal during the desorption. We find that the H-2 desorption is Ist order in theta(H) with an activation energy of 69 +/- 6 kcal/mol and a prefactor of 10(10.5+/- 0.9) s(-1). We suggest that formation of a C-C pi-bond on the clean surface plays a key role in H-2 desorption from diamond, a view consistent with previous theoretical calculations of H-2 desorption from diamond. C1 IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. RP KOLESKE, DD (reprint author), USN,RES LAB,CODE 6177,WASHINGTON,DC 20375, USA. RI Butler, James/B-7965-2008; Russell, John/A-3621-2009 OI Butler, James/0000-0002-4794-7176; NR 53 TC 22 Z9 22 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD DEC 1 PY 1994 VL 320 IS 3 BP L105 EP L111 DI 10.1016/0039-6028(94)90306-9 PG 7 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA PV671 UT WOS:A1994PV67100007 ER PT J AU GOLAN, H MOORE, HJ GROSSMAN, Y AF GOLAN, H MOORE, HJ GROSSMAN, Y TI QUANTAL ANALYSIS OF PRESYNAPTIC INHIBITION, LOW [CA2+](0), AND HIGH-PRESSURE INTERACTIONS AT CRUSTACEAN EXCITATORY SYNAPSES SO SYNAPSE LA English DT Article DE NEUROMUSCULAR JUNCTION; GLUTAMATE RELEASE; GABAERGIC TRANSMISSION; BINOMIAL DISTRIBUTION; LOBSTER ID CRAYFISH NEUROMUSCULAR-JUNCTION; MOTOR AXON TERMINALS; NEUROTRANSMITTER RELEASE; HYDROSTATIC-PRESSURE; BINOMIAL PARAMETERS; TRANSMITTER RELEASE; BIFURCATING AXON; NERVE-TERMINALS; FACILITATION; MODULATION AB The cellular mechanisms underlying the effects of high pressure, GABAergic presynaptic inhibition, and low [Ca2+](0) on glutamatergic excitatory synaptic transmission were studied in the opener muscle of the lobster walking leg. Excitatory postsynaptic currents (EPSCs) were recorded with or without prior stimulation of the inhibitor using a loose macropatch clamp technique at atmospheric pressure and at 6.9 MPA helium pressure. High pressure reduced the mean EPSC amplitude and variance, decreased the quantal content (m), but did not affect the quantum current (q). Pressure shifted the median of the amplitude histogram to the left by 1-2 q. Under normal pressure conditions, presynaptic inhibition and low [Ca2+](0) induced similar effects. However, quantal analysis using a binomial frequency distribution model revealed that high pressure and low [Ca2+](0) diminished n (available active zones) and slightly increased p (probability of release), but presynaptic inhibition reduced p and slightly increased n. At high pressure, presynaptic inhibition was reduced, at which time the major contributor to the inhibitory process appeared to be reduction in n and not p. The similarity of the alterations in quantal parameters of release at high pressure, low [Ca2+](0), and in some conditions of presynaptic inhibition is consistent with the hypothesis that pressure reduces Ca2+ inflow into the presynaptic nerve terminals to affect the Ca2+-dependent quantal release parameters n and p. (C) 1994 Wiley-Liss, Inc.* C1 USN,MED RES INST,HIGH PRESSURE MOLEC & CELLULAR NEUROBIOL GRP,BETHESDA,MD 20889. RP GOLAN, H (reprint author), BEN GURION UNIV NEGEV,FAC HLTH SCI,COROB CTR MED RES,DEPT PHYSIOL,IL-84105 BEER SHEVA,ISRAEL. RI GOLAN, HAVA/F-2121-2012 NR 48 TC 17 Z9 17 U1 0 U2 3 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-4476 J9 SYNAPSE JI Synapse PD DEC PY 1994 VL 18 IS 4 BP 328 EP 336 DI 10.1002/syn.890180408 PG 9 WC Neurosciences SC Neurosciences & Neurology GA QH899 UT WOS:A1994QH89900007 PM 7886625 ER PT J AU RICHMOND, ED AF RICHMOND, ED TI X-RAY PHOTOELECTRON-SPECTROSCOPY ANALYSIS OF THE GROWTH-KINETICS OF GE ON SI(001) SO THIN SOLID FILMS LA English DT Article DE GROWTH MECHANISM; INTERFACES; SCANNING ELECTRON MICROSCOPY; X-RAY PHOTOELECTRON SPECTROSCOPY ID SCANNING TUNNELING MICROSCOPY; OPTICAL-TRANSITIONS; LAYER SUPERLATTICES; SI(100)-2X1 SURFACE; FILMS; SI; STRAIN; SI/GE(001); NUCLEATION; RELAXATION AB The growth kinetics of Ge on Si(001) is determined from the X-ray photoelectron measurements of the Si 2p core level intensity and the Ge 2p3/2 core level intensity as a function of the Ge overlayer thickness. The growth kinetics of the Ge overlayer follow a Stranski-Krastanov growth mode. The critical thickness is almost-equal-to 2.2 ML (where ML means monolayers). The change in the growth kinetics, from a layer-by-layer mode to an island nucleation-and-growth mode is spontaneous. The distribution and the partial relaxation of the misfit strain of this pseudomorphic system are measured by the change in the full width at half-maximum of the Si 2p and Ge 2p3/2 core levels. The strain is found to be confined to the Ge overlayer. Partial relaxation of the misfit strain precedes the transition from the layer-by-layer mode to the island nucleation-and-growth mode. Scanning electron micrographs confirm that the critical thickness occurs in the interval 1.8 ML of Ge to 2.8 ML of Ge. A second transition occurs at almost-equal-to 6.9 ML of Ge and corresponds to the nucleation and growth of large three-dimensional islands. RP RICHMOND, ED (reprint author), USN,RES LAB,CODE 6812,WASHINGTON,DC 20375, USA. NR 45 TC 5 Z9 5 U1 1 U2 2 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 DEC 1 PY 1994 VL 252 IS 2 BP 98 EP 104 DI 10.1016/0040-6090(94)90780-3 PG 7 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA PT310 UT WOS:A1994PT31000005 ER PT J AU ZWINGELBERG, KM JAEGER, MJ AF ZWINGELBERG, KM JAEGER, MJ TI APPLICATION OF A VALVELESS ANESTHESIA CIRCUIT FOR DEEP DIVING SO UNDERSEA & HYPERBARIC MEDICINE LA English DT Note DE BREATHING APPARATUSES; CARBON DIOXIDE; HYPERBARIC CHAMBER (DRY); RESPIRATION; SATURATION DIVING; WORK ID MAPLESON-D SYSTEM; VENTILATION; MODEL AB The Mapleson E breathing circuit used in anesthesia has no valves or CO2-absorbent canisters and thus entails low resistance to breathing and has low requirements for fresh gas flow (FGF). The authors investigated whether these advantages would make a circuit, modified for hyperbaric use, able to support ventilation during heavy work on the surface and at deep depths with reduced FGF rates. The current recommended FGF for free-flowing diving circuits is 170 liters/min. Six Navy divers participated in IO-min graded exercise sequences, peak workload 220 W. Measurements were made of inspired and end-tidal concentrations of CO2, tidal volume, respiratory rate, and CO2 production at both sea level and 2.7 MPa dry environment. At sea level, all six divers were able to finish their exercises using the modified circuit with all tested rates of FGF. At 2.7 MPa the exercise sequence could be finished by all subjects when FGF was 170 liter/min and by five subjects when FGF was 127.5 liter/min, but high end-tidal CO2 measurements and hypercapnia symptoms were common at 127.5 liter/min. None of the subjects was able or allowed to finish the exercise sequence when FGF was 85 liter/min. Lower work-loads of 75 and 150 W for up to 4 min were completed easily by all subjects at all three rates of FGF. We conclude that this circuit concept warrants further study because it requires lower FGF than is currently used with open-circuit helmets and is valveless; how much of a reduction in FGF could be tolerated with heavy work at depths such as 2.7 MPa requires further study. C1 UNIV FLORIDA,J HILLIS MILLER HLTH CTR,DEPT ANESTHESIOL,GAINESVILLE,FL 32610. UNIV FLORIDA,J HILLIS MILLER HLTH CTR,DEPT PHYSIOL,GAINESVILLE,FL 32610. RP ZWINGELBERG, KM (reprint author), USN,EXPTL DIVING UNIT,PANAMA CITY,FL 32507, USA. NR 19 TC 0 Z9 0 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 DEC PY 1994 VL 21 IS 4 BP 443 EP 458 PG 16 WC Marine & Freshwater Biology; Medicine, Research & Experimental SC Marine & Freshwater Biology; Research & Experimental Medicine GA QL994 UT WOS:A1994QL99400008 PM 8000284 ER PT J AU HOFFMAN, SL SEDEGAH, M HEDSTROM, RC AF HOFFMAN, SL SEDEGAH, M HEDSTROM, RC TI PROTECTION AGAINST MALARIA BY IMMUNIZATION WITH A PLASMODIUM-YOELII CIRCUMSPOROZOITE PROTEIN NUCLEIC-ACID VACCINE SO VACCINE LA English DT Article DE NUCLEIC ACID VACCINE; MALARIA; CIRCUMSPOROZOITE ID T-CELL CLONES; PLASMID DNA; SPOROZOITES; GENE; ANTIBODIES; INFLUENZA; IMMUNITY; MICE; PSEUDORABIES; FALCIPARUM AB Nucleic acid vaccines provide an exciting new alternative approach to developing the multiantigen vaccines designed to induce protective antibody and T-cell responses against Plasmodium proteins that many experts believe will be required for effective protection against malaria. As a first step in this process, we produced a plasmid DNA vaccine thar includes the gene encoding the P. yoelii circumsporozoite protein (PyCSP). This vaccine induced higher levels of antibodies and cytotoxic T lymphocytes against PyCSP than immunization with irradiated sporozoites, and protected 9 of the first 16 mice immunized. work is now in progress to optimize immunization regimens, establish the mechanisms of protective immunity induced by the vaccine, and to determine whether protective immunity can be increased by vaccinating with multiple nucleic acid vaccines designed to produce immune responses against multiple targets. C1 PAN AMER HLTH ORG,WASHINGTON,DC 20037. RP HOFFMAN, SL (reprint author), USN,MED RES INST,MALARIA PROGRAM,BETHESDA,MD 20889, USA. NR 27 TC 78 Z9 83 U1 0 U2 2 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0264-410X J9 VACCINE JI Vaccine PD DEC PY 1994 VL 12 IS 16 BP 1529 EP 1533 DI 10.1016/0264-410X(94)90078-7 PG 5 WC Immunology; Medicine, Research & Experimental SC Immunology; Research & Experimental Medicine GA PU219 UT WOS:A1994PU21900010 PM 7879419 ER PT J AU DELSANTO, PP SCHECHTER, RS CHASKELIS, HH MIGNOGNA, RB KLINE, R AF DELSANTO, PP SCHECHTER, RS CHASKELIS, HH MIGNOGNA, RB KLINE, R TI CONNECTION MACHINE SIMULATION OF ULTRASONIC WAVE-PROPAGATION IN MATERIALS .2. THE 2-DIMENSIONAL CASE SO WAVE MOTION LA English DT Article ID SCATTERING AB A local interaction simulation approach (LISA) for the wave propagation in inhomogeneous 2D media is presented. The method is designed to take full advantage of massively parallel computing, such as provided by the Connection Machine. Crosspoints at the intersection of orthogonal interfaces separating media of different physical properties are treated in the framework of a sharp interface model. A comparison with finite difference techniques shows that the proposed method avoids the ambiguities due to the smoothing of the physical quantities, which is necessary in order to transform differential equations into finite difference equations. The smoothing procedure may cause severe numerical errors, when the variations of the physical properties across the interfaces are large. In order to demonstrate the efficiency and reliability of the approach several examples of simulation of pulse propagation in different media are reported. C1 USN, RES LAB, WASHINGTON, DC 20375 USA. UNIV OKLAHOMA, SCH AEROSP & MECH ENGN, NORMAN, OK 73019 USA. RP DELSANTO, PP (reprint author), POLITECN TORINO, DIPARTIMENTO FIS, I-10129 TURIN, ITALY. NR 35 TC 110 Z9 111 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0165-2125 J9 WAVE MOTION JI Wave Motion PD DEC PY 1994 VL 20 IS 4 BP 295 EP 314 DI 10.1016/0165-2125(94)90016-7 PG 20 WC Acoustics; Mechanics; Physics, Multidisciplinary SC Acoustics; Mechanics; Physics GA PY176 UT WOS:A1994PY17600001 ER PT J AU GOERSS, JS JEFFRIES, RA AF GOERSS, JS JEFFRIES, RA TI ASSIMILATION OF SYNTHETIC TROPICAL CYCLONE OBSERVATIONS INTO THE NAVY OPERATIONAL GLOBAL ATMOSPHERIC PREDICTION SYSTEM SO WEATHER AND FORECASTING LA English DT Article AB In June 1990, the assimilation of synthetic tropical cyclone observations into the Navy Operational Global Atmospheric Prediction System (NOGAPS) was initiated at Fleet Numerical Oceanography Center (FNOC). These observations are derived directly from the information contained in the tropical cyclone warnings issued by the Joint Typhoon Warning Center (JTWC) and the National Hurricane Center. This paper describes these synthetic observations, the evolution of their use at FNOC, and the details of their assimilation into NOGAPS. The results of a comprehensive evaluation of the 1991 NOGAPS tropical cyclone forecast performance in the western North Pacific are presented. NOGAPS analysis and forecast position errors were determined for all tropical circulations of tropical storm strength or greater. It was found that, after the assimilation of synthetic observations, the NOGAPS spectral forecast model consistently maintained the tropical circulations as evidenced by detection percentages of 96%, 90%, and 87% for 24-, 48-, and 72-h forecasts, respectively. The average forecast position errors were 188, 299, and 434 km for the respective forecasts. The respective errors for the One-Way Influence Tropical Cyclone Model (OTCM), one of JTWC's primary track-forecasting aids, were 215, 364, and 529 km. In homogeneous comparisons the percent improvement of the NOGAPS 48- and 72-h forecasts was 14% and 12% over the OTCM and 31% and 33% over JTWC's operational Climatology-Persistence Model. RP GOERSS, JS (reprint author), USN,RES LAB,DIV MARINE METEOROL,MONTEREY,CA 93943, USA. NR 0 TC 70 Z9 73 U1 0 U2 2 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0882-8156 J9 WEATHER FORECAST JI Weather Forecast. PD DEC PY 1994 VL 9 IS 4 BP 557 EP 576 DI 10.1175/1520-0434(1994)009<0557:AOSTCO>2.0.CO;2 PG 20 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA QL526 UT WOS:A1994QL52600008 ER PT J AU BRADSHAW, DA MURRAY, KM MULL, NH AF BRADSHAW, DA MURRAY, KM MULL, NH TI MASSIVE HEMOPTYSIS IN PREGNANCY DUE TO A SOLITARY PULMONARY ARTERIOVENOUS MALFORMATION SO WESTERN JOURNAL OF MEDICINE LA English DT Note ID FISTULAS; EMBOLOTHERAPY; DETERIORATION C1 USN,MED CTR,DEPT INTERNAL MED,DIV PULM,SAN DIEGO,CA 92134. RP BRADSHAW, DA (reprint author), USN,MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. NR 19 TC 4 Z9 5 U1 0 U2 0 PU CALIF MEDICAL ASSN PI SAN FRANCISCO PA 221 MAIN STREET, SAN FRANCISCO, CA 94105 SN 0093-0415 J9 WESTERN J MED JI West. J. Med. PD DEC PY 1994 VL 161 IS 6 BP 600 EP 602 PG 3 WC Medicine, General & Internal SC General & Internal Medicine GA PX758 UT WOS:A1994PX75800011 PM 7856165 ER PT J AU SZEBENI, J WASSEF, NM SPIELBERG, H RUDOLPH, AS ALVING, CR AF SZEBENI, J WASSEF, NM SPIELBERG, H RUDOLPH, AS ALVING, CR TI COMPLEMENT ACTIVATION IN RATS BY LIPOSOMES AND LIPOSOME-ENCAPSULATED HEMOGLOBIN - EVIDENCE FOR ANTI-LIPID ANTIBODIES AND ALTERNATIVE PATHWAY ACTIVATION SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article ID DEPENDENT PHAGOCYTOSIS; BIOLOGICAL RESPONSES; BLOOD SUBSTITUTE; ERYTHROCYTES; SYSTEM; CHOLESTEROL; PHOSPHATIDYLCHOLINE; INHIBITION; COMPONENT; BINDING AB Intravenous injection of hemoglobin-containing liposomes (LEH) caused a significant reduction in plasma hemolytic complement activity in rats on a time scale of minutes. Liposomes without hemoglobin also caused complement consumption, but less than LEY while free hemoglobin was without effect. Consistent with complement activation, the LEH-induced drop in plasma hemolytic complement activity was closely paralleled by an increase in plasma thromboxane B-2 level. Studies to determine the mechanism of complement activation demonstrated the presence of natural antibodies in rat serum against all lipid components of LEH, thus, the potential for classical pathway activation. Yet, in vitro incubation of LEH with rat serum showed that: 1) EGTA/Mg++, which inhibits complement activation through the classical pathway, did not inhibit complement consumption by LEH, and 2) the use of serum preheated at 50 degrees C, which inhibits C activation through the alternative pathway by selectively depleting factor B, effectively reversed the complement-consuming effect of LEH. Consequently, LEI-I-induced complement activation in rat serum seems to involve primarily the alternative pathway. (C) 1994 Academic Press, Inc. C1 GEORGETOWN UNIV,DEPT BIOCHEM & MOLEC BIOL,WASHINGTON,DC 20007. USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. RP SZEBENI, J (reprint author), WALTER REED ARMY MED CTR,WALTER REED ARMY INST RES,DEPT MEMBRANE BIOCHEM,WASHINGTON,DC 20307, USA. NR 53 TC 44 Z9 44 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD NOV 30 PY 1994 VL 205 IS 1 BP 255 EP 263 DI 10.1006/bbrc.1994.2658 PG 9 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA PW785 UT WOS:A1994PW78500039 PM 7999033 ER PT J AU VASUDEVEN, AK SADANANDA, K LOUAT, N AF VASUDEVEN, AK SADANANDA, K LOUAT, N TI A REVIEW OF CRACK CLOSURE, FATIGUE-CRACK THRESHOLD AND RELATED PHENOMENA SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Review ID STRESS RATIO; GROWTH-BEHAVIOR; PLANE-STRAIN; ENVIRONMENT; PROPAGATION; ALLOY; MODEL; MICROSTRUCTURE; TEMPERATURE; MECHANISMS AB Published fatigue crack closure mechanisms are reviewed in the context of the following five ideas that have been developed over the past twenty years to explain the closure effects on near-threshold crack growth behaviour: (1) oxide, (2) asperity, (3) plasticity, (4) phase transformation and (5) viscous fluids. The first three have been considered as more important than the last two. Our analysis indicates that (a) there can be no contribution from plasticity to crack closure, (b) the crack closure contribution can be significant only if it is closed fully, which is reflected as an infinite slope in the load-displacement curve, (c) formation of oxide asperities from a fretting action is a random process and not a deterministic one, and therefore cannot explain the deterministic behaviour of the effect of load ratio on the threshold, and (d) the closure contribution from the asperities resulting from oxides or corrosion products, or surface roughness, it is less than 20% of what has been deduced based on the change in the slope of the load-displacement curves. Thus the analyses show that crack closure can exist, but its magnitude is either small or negligible. The critical evaluation of the literature data on (1) the threshold stress intensity variation with load ratio on many materials, and (2) and examination of the experimentally observed load-displacement curves confirm the above conclusions. Hence to rationalize the observed variations in the fatigue crack threshold with load ratio, we have proposed a new model. It postulates a requirement for two critical stress intensity parameters, namely Delta K-th* and K-max*, that must be satisfied simultaneously as the crack tip driving forces for fatigue crack growth. This requirement is fundamental to fatigue, since an unambiguous description of cyclic loads requires two independent load parameters. Several experimental results from the literature are presented in support of this postulation. Using these two critical parameters, the entire functional relationship between K-max, Delta K-th, and R is explained without invoking an extrinsic factor, namely crack closure. In addition, for a given material and its crack tip environment, a unique relationship between Delta K-th and K-max exists that is independent of test methods used in determining thresholds. Finally, because of this two parameter requirement, all fatigue crack growth data need to be represented in terms of three-dimensional plots involving da/dN, Delta K and K-max. For a two-dimensional representation, the data need to be transformed correctly, defining the net driving force involving both Delta K and K-max parameters. The concepts presented are independent of whether crack closure exists or not, or even whether cracks exist or not. C1 USN,RES LAB,WASHINGTON,DC 20375. FAIRFAX MAT GRP,ALEXANDRIA,VA. RP VASUDEVEN, AK (reprint author), OFF NAVAL RES,CODE 4421,800 N QUINCY ST,ARLINGTON,VA 22217, USA. NR 49 TC 204 Z9 210 U1 7 U2 65 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 NOV 30 PY 1994 VL 188 IS 1-2 BP 1 EP 22 DI 10.1016/0921-5093(94)90351-4 PG 22 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA PU058 UT WOS:A1994PU05800001 ER PT J AU TREECE, RE HORWITZ, JS CLAASSEN, JH CHRISEY, DB AF TREECE, RE HORWITZ, JS CLAASSEN, JH CHRISEY, DB TI PULSED-LASER DEPOSITION OF HIGH-QUALITY NBN THIN-FILMS SO APPLIED PHYSICS LETTERS LA English DT Article ID SUPERCONDUCTING FILMS; NITRIDE RP TREECE, RE (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 26 TC 33 Z9 34 U1 3 U2 17 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 NOV 28 PY 1994 VL 65 IS 22 BP 2860 EP 2862 DI 10.1063/1.112516 PG 3 WC Physics, Applied SC Physics GA PU404 UT WOS:A1994PU40400035 ER PT J AU TANG, CM LAU, YY SWYDEN, TA AF TANG, CM LAU, YY SWYDEN, TA TI DEFLECTION MICROWAVE-AMPLIFIER WITH FIELD-EMITTER ARRAYS SO APPLIED PHYSICS LETTERS LA English DT Article C1 UNIV MICHIGAN,DEPT NUCL ENGN,ANN ARBOR,MI 48109. OMEGA P INC,NEW HAVEN,CT 06520. FM TECHNOL INC,FAIRFAX,VA 22032. RP TANG, CM (reprint author), USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375, USA. NR 12 TC 3 Z9 3 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 NOV 28 PY 1994 VL 65 IS 22 BP 2881 EP 2883 DI 10.1063/1.112522 PG 3 WC Physics, Applied SC Physics GA PU404 UT WOS:A1994PU40400042 ER PT J AU SPRUNT, S NOUNESIS, G NACIRI, J RATNA, BR SHASHIDHAR, R AF SPRUNT, S NOUNESIS, G NACIRI, J RATNA, BR SHASHIDHAR, R TI STABILITY OF MAGNETIC-FIELD-INDUCED DIPOLAR ORDER IN A FERROELECTRIC SIDE-CHAIN LIQUID-CRYSTAL POLYMER SO APPLIED PHYSICS LETTERS LA English DT Article ID 2ND-HARMONIC GENERATION; RELAXATION; DECAY RP SPRUNT, S (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375, USA. NR 25 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD NOV 21 PY 1994 VL 65 IS 21 BP 2681 EP 2683 DI 10.1063/1.112601 PG 3 WC Physics, Applied SC Physics GA PT872 UT WOS:A1994PT87200019 ER PT J AU RIZOS, AK NGAI, KL AF RIZOS, AK NGAI, KL TI SOLVENT ROTATIONAL MOBILITY IN 1,2-POLYBUTADIENE AROCLOR SOLUTIONS BY DIELECTRIC-RELAXATION AND FABRY-PEROT INTERFEROMETRY SO MACROMOLECULES LA English DT Article ID AROCLOR SOLUTIONS; POLYMER-SOLUTIONS; POLYSTYRENE AROCLOR; DYNAMICS; FRICTION; POLYBUTADIENE; POLYISOPRENE; VISCOSITY AB The presence of poly(1,2-butadiene) in the solvent Aroclor enhances the mean solvent rotational mobility relative to the neat solvent case even though the polymer has a higher glass transition temperature than that of the solvent. This interesting behavior found earlier by photon correlation spectroscopy is confirmed by dielectric relaxation and Fabry-Perot interferometry. The new data extend significantly the frequency and temperature ranges of observation of the modification of the Aroclor dynamics in solutions of poly(1,2-butadiene) and quantify the rate at which the addition of the polymer alters the mean solvent reorientation time as a function of temperature. C1 UNIV CRETE,RES CTR CRETE,CRETE,GREECE. USN,RES LAB,WASHINGTON,DC 20375. RP RIZOS, AK (reprint author), UNIV CRETE,DEPT CHEM,POB 1527,CRETE,GREECE. RI Rizos, Apostolos/F-6807-2011 NR 16 TC 6 Z9 6 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD NOV 21 PY 1994 VL 27 IS 24 BP 7076 EP 7078 DI 10.1021/ma00102a011 PG 3 WC Polymer Science SC Polymer Science GA PU648 UT WOS:A1994PU64800011 ER PT J AU SCHWARTZ, IB TSANG, KY AF SCHWARTZ, IB TSANG, KY TI ANTIPHASE SWITCHING IN JOSEPHSON-JUNCTION ARRAYS SO PHYSICAL REVIEW LETTERS LA English DT Article ID IDENTICAL OSCILLATORS; COUPLED OSCILLATORS; DYNAMICS; STATES RP SCHWARTZ, IB (reprint author), USN,RES LAB,SPECIAL PROJECT NONLINEAR SCI,PPD CODE 67003,WASHINGTON,DC 20375, USA. RI Schwartz, Ira/A-8073-2009 NR 19 TC 16 Z9 16 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 NOV 21 PY 1994 VL 73 IS 21 BP 2797 EP 2800 DI 10.1103/PhysRevLett.73.2797 PG 4 WC Physics, Multidisciplinary SC Physics GA PT726 UT WOS:A1994PT72600003 ER PT J AU JIN, C HETTICH, RL COMPTON, RN TUINMAN, A DERECSKEIKOVACS, A MARYNICK, DS DUNLAP, BI AF JIN, C HETTICH, RL COMPTON, RN TUINMAN, A DERECSKEIKOVACS, A MARYNICK, DS DUNLAP, BI TI ATTACHMENT OF 2 ELECTRONS TO C60F48 - COULOMB BARRIERS IN DOUBLY-CHARGED ANIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID DIATOMIC DIFFERENTIAL-OVERLAP; PARTIAL RETENTION; MOLECULES; APPROXIMATIONS; IONS; POLARIZABILITIES; IONIZATION; EXCHANGE; ATOMS C1 UNIV TENNESSEE, DEPT CHEM, KNOXVILLE, TN 37996 USA. UNIV TEXAS, DEPT CHEM, ARLINGTON, TX 76019 USA. USN, RES LAB, WASHINGTON, DC 20375 USA. RP JIN, C (reprint author), OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RI Hettich, Robert/N-1458-2016; OI Hettich, Robert/0000-0001-7708-786X; Dunlap, Brett/0000-0003-1356-6559 NR 28 TC 100 Z9 100 U1 0 U2 6 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 NOV 21 PY 1994 VL 73 IS 21 BP 2821 EP 2824 DI 10.1103/PhysRevLett.73.2821 PG 4 WC Physics, Multidisciplinary SC Physics GA PT726 UT WOS:A1994PT72600009 ER PT J AU FROMMHOLD, L ATCHLEY, AA AF FROMMHOLD, L ATCHLEY, AA TI IS SONOLUMINESCENCE DUE TO COLLISION-INDUCED EMISSION SO PHYSICAL REVIEW LETTERS LA English DT Article ID ABSORPTION-SPECTRA; PAIRS; BAND C1 UNIV TEXAS,APPL RES LABS,AUSTIN,TX 78713. USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93943. RP FROMMHOLD, L (reprint author), UNIV TEXAS,DEPT PHYS,AUSTIN,TX 78712, USA. NR 21 TC 53 Z9 53 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 NOV 21 PY 1994 VL 73 IS 21 BP 2883 EP 2886 DI 10.1103/PhysRevLett.73.2883 PG 4 WC Physics, Multidisciplinary SC Physics GA PT726 UT WOS:A1994PT72600025 ER PT J AU SISKIND, DE AF SISKIND, DE TI ON THE RADIATIVE COUPLING BETWEEN MESOSPHERIC AND THERMOSPHERIC NITRIC-OXIDE SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID IONIZATION FREQUENCIES; PHOTO-DISSOCIATION; SOLAR CYCLE-21; AURORAL STORM; ODD-NITROGEN; STRATOSPHERE; MIDDLE; TRANSPORT; LATITUDES; BANDS AB A photochemical model of nitric oxide from 40 to 250 km has been used to study the distribution of NO in the mesosphere and lower thermosphere. The model includes a parameterization of NO photolysis that can account for the opacity of a varying thermospheric NO layer. This model is used to test the suggestion that increases in thermospheric. NO which increase this opacity ''shield'' NO at lower altitudes by decreasing the photolytic destruction rate. The model was ''tuned'' to reproduce two recent observations of thermospheric NO, the high latitude rocket experiment of Eparvier and Barth [1992] and the midlatitude ground-based microwave experiment of Clancy et al. [1992]. In the first case, the model indicated that the large thermospheric NO layer could have caused significant shielding and up to a factor of 2 effect on the mesospheric NO is seen. On the other hand, for the midlatitude observation the NO optical pathlength was too small to be significant. A time dependent version of the model was used to study the response of mesospheric NO to auroral energy input during winter. Under conditions which combine rapid transport and NO self-shielding, the model suggests that NO density increases could propagate into the upper stratosphere. RP SISKIND, DE (reprint author), USN, RES LAB, EO HULBURT CTR SPACE RES, CODE 76416, 4555 OVERLOOK AVE SW, WASHINGTON, DC 20375 USA. NR 33 TC 13 Z9 13 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD NOV 20 PY 1994 VL 99 IS D11 BP 22757 EP 22766 DI 10.1029/94JD01206 PG 10 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA PT032 UT WOS:A1994PT03200001 ER PT J AU REMSBERG, EE BHATT, PP ECKMAN, RS GORDLEY, LL RUSSELL, JM SISKIND, DE AF REMSBERG, EE BHATT, PP ECKMAN, RS GORDLEY, LL RUSSELL, JM SISKIND, DE TI EFFECT OF THE HITRAN-92 SPECTRAL DATA ON THE RETRIEVAL OF NO2 MIXING RATIOS FROM NIMBUS-7 LIMS SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID INFRARED MONITOR; NITROGEN-DIOXIDE; STRATOSPHERIC OZONE; ODD NITROGEN; VALIDATION; ATMOSPHERE; HNO3 AB To ensure spectral consistency when comparing Nimbus 7 LIMS NO2 distributions with those from ATMOS and UARS, 1 day (May 5, 1979) of LIMS measurements were reprocessed using the NO2 line list on the HITRAN 92 tape compiled by AFGL. The revised NO2 mixing ratios are smaller by up to 20%. The decrease is not constant with height, latitude, or time of day but depends on the absolute amount of NO2 in the profile, as a result of a change in the degree of saturation for the strong NO2 spectral lines. The revised NO2 agrees better with correlative measurements and with NO2 distributions from the SAGE and HALOE satellite experiments but not with those from ATMOS 85. Profiles of the day/night ratio of revised NO2 are now larger near 5 hPa. There is also some improvement between observed and modeled ozone in the upper stratosphere, when the revised nighttime NO2 profile is used as the estimate of NOy for the model calculations. C1 SCI APPLICAT INT CORP, HAMPTON, VA 23666 USA. USN, RES LAB, WASHINGTON, DC 20375 USA. G & A TECH SOFTWARE INC, HAMPTON, VA 23666 USA. RP REMSBERG, EE (reprint author), NASA, LANGLEY RES CTR, DIV ATMOSPHER SCI, HAMPTON, VA 23681 USA. NR 38 TC 9 Z9 9 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD NOV 20 PY 1994 VL 99 IS D11 BP 22965 EP 22973 DI 10.1029/94JD02042 PG 9 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA PT032 UT WOS:A1994PT03200018 ER PT J AU SINGH, DJ PICKETT, WE AF SINGH, DJ PICKETT, WE TI PRESSURE-DEPENDENT ELECTRONIC-STRUCTURE AND DOPING IN HGBA2CA2CU3O8+DELTA SO PHYSICA C LA English DT Article ID SUPERCONDUCTIVITY; TEMPERATURE; MERCURY; 150-K; T(C) AB Local-density approximation electronic structure calculations are reported for HgBa2Ca2Cu3O8+delta both at ambient pressure and at 9.2 GPa. The apical O height was relaxed using total energy minimization. These calculations, which were performed for delta = 0.5 within a supercell geometry, show that the doping level of the CuO2 planes does increase under pressure. However, the increase is found to be quite modest amounting to less than 0.02 additional holes per Cu atom at 9.2 GPa. We suggest that variations in the doping level under pressure may not be solely responsible for the large increases observed in the superconducting critical temperature of this material. RP SINGH, DJ (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. RI Singh, David/I-2416-2012 NR 19 TC 18 Z9 18 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD NOV 20 PY 1994 VL 233 IS 3-4 BP 237 EP 241 DI 10.1016/0921-4534(94)90748-X PG 5 WC Physics, Applied SC Physics GA PT740 UT WOS:A1994PT74000002 ER PT J AU PEDERSON, MR AF PEDERSON, MR TI DENSITY-FUNCTIONAL BASED DETERMINATION OF THE CH3-CH4 HYDROGEN-EXCHANGE REACTION BARRIER SO CHEMICAL PHYSICS LETTERS LA English DT Article ID CORRELATION-ENERGY; ORBITAL APPROACH; ELECTRON-GAS; APPROXIMATION; ACCURATE; SIMULATIONS; SYSTEMS AB Due to the overbinding that is inherent in existing local approximations to the density-functional formalism, certain reaction energies have not been accessible. Since the generalized gradient approximation significantly decreases the overbinding, prospects for density-functional based reaction dynamics are promising. Results on the generalized-gradient based determination of the CH3-CH4 hydrogen exchange reaction are presented. Including all Born-Oppenheimer effects an energy barrier of 9.5 kcal/mol is found which is a very significant improvement over the local-density approximation. RP PEDERSON, MR (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. NR 35 TC 17 Z9 17 U1 0 U2 2 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 NOV 18 PY 1994 VL 230 IS 1-2 BP 54 EP 60 DI 10.1016/0009-2614(94)01120-6 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PR847 UT WOS:A1994PR84700008 ER PT J AU KARLE, IL RAO, RB PRASAD, S KAUL, R BALARAM, P AF KARLE, IL RAO, RB PRASAD, S KAUL, R BALARAM, P TI NONSTANDARD AMINO-ACIDS IN CONFORMATIONAL DESIGN OF PEPTIDES - HELICAL STRUCTURES IN CRYSTALS OF 5-10-RESIDUE PEPTIDES CONTAINING DIPROPYLGLYCINE AND DIBUTYLGLYCINE SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID X-RAY-DIFFRACTION; ALPHA-AMINOISOBUTYRIC-ACID; SYNTHETIC PROTEIN MIMICS; C-ALPHA,ALPHA-DIALKYLATED GLYCINES; 1-AMINOCYCLOPENTANE-1-CARBOXYLIC ACID; LINEAR OLIGOPEPTIDES; ENERGY COMPUTATION; CRYSTALLOGRAPHIC CHARACTERIZATION; DIALKYLATED GLYCINES; INFRARED-ABSORPTION AB Nonstandard amino acids dipropylglycine (Dpg) and dibutylglycine (Dbg) have been incorporated into penta- to decapeptides in order to impose local restrictions on the polypeptide chain stereochemistry. In each case, the Dpg and Dbg residues showed similar helix-forming propensity as the Aib (alpha-aminoisobutyric) residue. Further, the 3(10)- and alpha-helices containing the Dbg and Dpg residues had crystal packing motifs quite similar to those found for Aib-containing peptides. Crystal structure analyses are presented for Boc-Aib-Ala-Leu-Ala-Leu-Dpg-Leu-Ala-Leu-Aib-OMe (I), space group P2(1) with a = 11.313(3) Angstrom, b = 28.756(5) Angstrom, c = 11.884 A, beta = 103.74(1)degrees; Boc-Leu-Dpg-Leu-Ala-Leu-Aib-OMe, polymorph a (IIa), space group P1 with a = 10.205(5) Angstrom, b = 10.996(5) Angstrom, c = 21.393(9) Angstrom, = 81.92(3)degrees, beta = 88.20(3)degrees, gamma = 89.74(3)degrees and polymorph b (IIb), space group P2(1)2(1)2(1) with a = 9.291(1) Angstrom, b = 23.003(5) Angstrom, c = 23.085(6) Angstrom; and Boc-Leu-Dbg-Val-Ala-Leu-OMe (III), space group P2(1) with a 9.907(2) Angstrom, b = 16.078(3) Angstrom, c 13.543(3) Angstrom, beta = 104.48(2)degrees. The observation of helical conformations at all Dpg/Dbg residues is not entirely expected on the basis of conformational energy calculations and crystal structure observations on small homooligopeptides. C1 BANARAS HINDU UNIV,DEPT CHEM,VARANASI 221005,UTTAR PRADESH,INDIA. INDIAN INST SCI,MOLEC BIOPHYS UNIT,BANGALORE 560012,KARNATAKA,INDIA. RP KARLE, IL (reprint author), USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375, USA. NR 41 TC 62 Z9 62 U1 1 U2 4 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 NOV 16 PY 1994 VL 116 IS 23 BP 10355 EP 10361 DI 10.1021/ja00102a001 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA PT130 UT WOS:A1994PT13000001 ER PT J AU HARRISON, JA BRENNER, DW AF HARRISON, JA BRENNER, DW TI SIMULATED TRIBOCHEMISTRY - AN ATOMIC-SCALE VIEW OF THE WEAR OF DIAMOND SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID CHEMICAL VAPOR-DEPOSITION; MOLECULAR-DYNAMICS; FRICTION; SURFACE; MODEL; FILMS; TIP AB Molecular dynamics simulations are used to explore the atomic-scale chemistry and associated wear that occurs when diamond surfaces are placed in sliding contact. The simulations predict complex radical chemistry initiated by the shearing of hydrogen atoms from chemisorbed molecules. Observed chemical mechanisms include hydrogen abstraction from the surfaces, radical recombination, transient surface adhesion, and formation of debris at the interface. These simulations provide the first glimpse into the rich, nonequilibrium tribochemistry that occurs at diamond and related covalently-bonded interfaces. C1 USN,RES LAB,WASHINGTON,DC 20375. RP HARRISON, JA (reprint author), USN ACAD,DEPT CHEM,ANNAPOLIS,MD 21402, USA. RI Brenner, Donald/D-1741-2009 NR 24 TC 82 Z9 85 U1 0 U2 9 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 NOV 16 PY 1994 VL 116 IS 23 BP 10399 EP 10402 DI 10.1021/ja00102a006 PG 4 WC Chemistry, Multidisciplinary SC Chemistry GA PT130 UT WOS:A1994PT13000006 ER PT J AU KUPPERMANN, BD QUICENO, JI WILEY, C HESSELINK, J HAMILTON, R KEEFE, K GARCIA, R FREEMAN, WR AF KUPPERMANN, BD QUICENO, JI WILEY, C HESSELINK, J HAMILTON, R KEEFE, K GARCIA, R FREEMAN, WR TI CLINICAL AND HISTOPATHOLOGIC STUDY OF VARICELLA-ZOSTER VIRUS RETINITIS IN PATIENTS WITH THE ACQUIRED-IMMUNODEFICIENCY-SYNDROME SO AMERICAN JOURNAL OF OPHTHALMOLOGY LA English DT Article ID ACUTE RETINAL NECROSIS; HERPES-SIMPLEX VIRUS; CYTOMEGALOVIRUS RETINITIS; ACYCLOVIR THERAPY; FOSCARNET THERAPY; AIDS; INFECTION; LEUKOENCEPHALITIS; VASCULOPATHY; RISK AB Varicella tester virus retinitis in patients with the acquired immunodeficiency syndrome is known to be a devastating disease. We studied a series of six consecutive patients that sheds new light on the clinical manifestations and treatment options of this disorder. All patients had episodes of cutaneous tester, long-term exposure to oral acyclovir, and CD4+ T lymphocyte counts less than 50 cells/mm(3). Two of the six patients had simultaneous radiographically demonstrable and histologically proven varicella tester virus encephalitis; this is an important association. Histologic examination of autopsy specimens disclosed that the retinal infection by varicella tester virus involves the retinal pigment epithelium more heavily than the inner retina, which is consistent with the characteristic clinical impression of an outer retinal necrosis. C1 UNIV CALIF SAN DIEGO,DEPT OPHTHALMOL,SAN DIEGO,CA 92103. UNIV CALIF SAN DIEGO,DEPT PATHOL,SAN DIEGO,CA 92103. UNIV CALIF SAN DIEGO,DEPT RADIOL,SAN DIEGO,CA 92103. UNIV CALIF IRVINE,DEPT OPHTHALMOL,IRVINE,CA. BALBOA NAVAL HOSP,DEPT OPHTHALMOL,SAN DIEGO,CA. FU NEI NIH HHS [EY07366] NR 28 TC 38 Z9 39 U1 0 U2 0 PU OPHTHALMIC PUBL CO PI CHICAGO PA 77 WEST WACKER DR, STE 660, CHICAGO, IL 60601 SN 0002-9394 J9 AM J OPHTHALMOL JI Am. J. Ophthalmol. PD NOV 15 PY 1994 VL 118 IS 5 BP 589 EP 600 PG 12 WC Ophthalmology SC Ophthalmology GA PQ077 UT WOS:A1994PQ07700004 PM 7977572 ER PT J AU FINK, M CALLOWAY, M AF FINK, M CALLOWAY, M TI COMBINED ACQUIRED FACTOR-V INHIBITOR AND LUPUS ANTICOAGULANT SO BLOOD LA English DT Meeting Abstract C1 USN,MED CTR,SAN DIEGO,CA 92132. NR 0 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A676 EP A676 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75402683 ER PT J AU RUSSELL, SD DUBBELDAY, WB GEORGIEF, P SHIMABUKURO, RL DELAHOUSSAYE, PR AF RUSSELL, SD DUBBELDAY, WB GEORGIEF, P SHIMABUKURO, RL DELAHOUSSAYE, PR TI THE EFFECTS OF MICROCRYSTALLINE STRUCTURE ON THE PHOTOLUMINESCENCE OF POROUS SILICON-ON-SAPPHIRE SO JOURNAL OF APPLIED PHYSICS LA English DT Note ID VISIBLE ELECTROLUMINESCENCE; WAFERS; LUMINESCENCE RP RUSSELL, SD (reprint author), USN,CTR COMMAND CONTROL & OCEAN SURVEILLANCE,DIV RDT&E NRAD,CODE 553,49375 ASHBURN RD,ROOM 2,SAN DIEGO,CA 92152, 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 15 PY 1994 VL 76 IS 10 BP 6012 EP 6013 DI 10.1063/1.358353 PN 1 PG 2 WC Physics, Applied SC Physics GA PT846 UT WOS:A1994PT84600062 ER PT J AU JONKER, BT ABAD, H KREBS, JJ AF JONKER, BT ABAD, H KREBS, JJ TI INTERFACIAL CONTRIBUTIONS TO MAGNETIC-ANISOTROPY IN METAL-SEMICONDUCTOR SYSTEMS SO JOURNAL OF APPLIED PHYSICS LA English DT Meeting Abstract ID FILMS RP JONKER, BT (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 3 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 15 PY 1994 VL 76 IS 10 BP 6294 EP 6294 DI 10.1063/1.358315 PN 2 PG 1 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800090 ER PT J AU CRESPO, P HERNANDO, A ESCORIAL, AG KEMNER, KM HARRIS, VG AF CRESPO, P HERNANDO, A ESCORIAL, AG KEMNER, KM HARRIS, VG TI EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE STUDIES OF HEAT-TREATED FCC-FE50CU50 POWDERS PROCESSED VIA HIGH-ENERGY BALL-MILLING SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID IMMISCIBLE ELEMENTS C1 CSIC,CENIM,E-28040 MADRID,SPAIN. USN,RES LAB,WASHINGTON,DC 20375. RP CRESPO, P (reprint author), INST MAGNETISMO APLICADO,POB 155,E-28230 MADRID,SPAIN. RI Harris, Vincent/A-8337-2009; Hernando, Antonio/E-2105-2015 NR 7 TC 21 Z9 21 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 NOV 15 PY 1994 VL 76 IS 10 BP 6322 EP 6324 DI 10.1063/1.358254 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800098 ER PT J AU ROESLER, GM FILIPKOWSKI, ME BROUSSARD, PR OSOFSKY, MS IDZERDA, YU AF ROESLER, GM FILIPKOWSKI, ME BROUSSARD, PR OSOFSKY, MS IDZERDA, YU TI MAGNETIZATION-RELATED TRANSPORT ANOMALIES IN METAL FERROMAGNETIC INSULATOR HETEROSTRUCTURES SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC RP ROESLER, GM (reprint author), USN,RES LAB,CODE 6340,WASHINGTON,DC 20375, USA. RI Osofsky, Michael/A-1050-2010 NR 4 TC 0 Z9 0 U1 1 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 NOV 15 PY 1994 VL 76 IS 10 BP 6437 EP 6439 DI 10.1063/1.358241 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800131 ER PT J AU WOLF, JA KREBS, JJ IDZERDA, YU PRINZ, GA AF WOLF, JA KREBS, JJ IDZERDA, YU PRINZ, GA TI MAGNETIC STUDIES OF FCC CO FILMS GROWN ON DIAMOND (ABSTRACT) SO JOURNAL OF APPLIED PHYSICS LA English DT Meeting Abstract RP WOLF, JA (reprint author), USN,RES LAB,CODE 6345,WASHINGTON,DC 20375, USA. NR 0 TC 3 Z9 3 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 NOV 15 PY 1994 VL 76 IS 10 BP 6452 EP 6452 DI 10.1063/1.358221 PN 2 PG 1 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800136 ER PT J AU LIN, HJ MEIGS, G CHEN, CT IDZERDA, YU PRINZ, GA HO, GH AF LIN, HJ MEIGS, G CHEN, CT IDZERDA, YU PRINZ, GA HO, GH TI ELEMENTAL DETERMINATION OF THE MAGNETIC-MOMENT VECTOR (ABSTRACT) SO JOURNAL OF APPLIED PHYSICS LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. UNIV PENN,PHILADELPHIA,PA 19104. RP LIN, HJ (reprint author), AT&T BELL LABS,600 MT AVE,MURRAY HILL,NJ 07974, USA. NR 1 TC 0 Z9 0 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 NOV 15 PY 1994 VL 76 IS 10 BP 6477 EP 6477 DI 10.1063/1.358230 PN 2 PG 1 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800146 ER PT J AU IDZERDA, YU CHEN, CT CHENG, SF VAVRA, W PRINZ, GA MEIGS, G LIN, HJ HO, GH AF IDZERDA, YU CHEN, CT CHENG, SF VAVRA, W PRINZ, GA MEIGS, G LIN, HJ HO, GH TI MULTIDOMAIN AND INCOMPLETE ALIGNMENT EFFECTS IN GIANT MAGNETORESISTANCE TRILAYERS SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID MAGNETIC-CIRCULAR-DICHROISM; ULTRATHIN FILMS; MULTILAYERS; SANDWICHES; NICKEL C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903. UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104. RP IDZERDA, YU (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 18 TC 9 Z9 10 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 NOV 15 PY 1994 VL 76 IS 10 BP 6525 EP 6527 DI 10.1063/1.358252 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800163 ER PT J AU SINGH, DJ AF SINGH, DJ TI LOCAL AND NONLOCAL DENSITY-FUNCTIONAL STUDIES OF FECR SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID GENERALIZED-GRADIENT-APPROXIMATION; EXCHANGE; MAGNETISM RP SINGH, DJ (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. RI Singh, David/I-2416-2012 NR 13 TC 13 Z9 13 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 NOV 15 PY 1994 VL 76 IS 10 BP 6688 EP 6690 DI 10.1063/1.358168 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800217 ER PT J AU RUBINSTEIN, M DAS, BN KOON, NC CHRISEY, DB HORWITZ, J AF RUBINSTEIN, M DAS, BN KOON, NC CHRISEY, DB HORWITZ, J TI GRANULAR GIANT MAGNETORESISTIVE MATERIALS AND THEIR FERROMAGNETIC RESONANCES (ABSTRACT) SO JOURNAL OF APPLIED PHYSICS LA English DT Meeting Abstract RP RUBINSTEIN, M (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 1 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 15 PY 1994 VL 76 IS 10 BP 6823 EP 6823 DI 10.1063/1.358141 PN 2 PG 1 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800261 ER PT J AU CLARK, AE WUNFOGLE, M TETER, JP RESTORFF, JB CHENG, SF AF CLARK, AE WUNFOGLE, M TETER, JP RESTORFF, JB CHENG, SF TI MAGNETIZATION, YOUNGS MODULI, AND MAGNETOSTRICTION OF RARE-EARTH-IRON EUTECTIC ALLOYS WITH R=TB0.6DY0.4 SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID TBXDY1-X RP CLARK, AE (reprint author), USN,CTR SURFACE WARFARE,CODE R34,SILVER SPRING,MD 20903, USA. NR 5 TC 7 Z9 7 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 NOV 15 PY 1994 VL 76 IS 10 BP 7009 EP 7011 DI 10.1063/1.358071 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800326 ER PT J AU TETER, JP CHENG, SF CULLEN, JR AF TETER, JP CHENG, SF CULLEN, JR TI STRESS EFFECT ON THE MAGNETIZATION OF DY IN THE DY/DYFE2 EUTECTIC SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC RP TETER, JP (reprint author), USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903, USA. NR 5 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 15 PY 1994 VL 76 IS 10 BP 7027 EP 7029 DI 10.1063/1.358076 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800332 ER PT J AU FILIPKOWSKI, ME GUTIERREZ, CJ KREBS, JJ PRINZ, GA AF FILIPKOWSKI, ME GUTIERREZ, CJ KREBS, JJ PRINZ, GA TI OBSERVATION OF LARGE BIQUADRATIC COUPLING OF FECO THROUGH MN (INVITED) (ABSTRACT) SO JOURNAL OF APPLIED PHYSICS LA English DT Meeting Abstract RP FILIPKOWSKI, ME (reprint author), USN,RES LAB,WASHINGTON,DC 20375, 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 15 PY 1994 VL 76 IS 10 BP 7090 EP 7090 DI 10.1063/1.358036 PN 2 PG 1 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800354 ER PT J AU ANKNER, JF SCHREYER, A ZABEL, H BORCHERS, JA MAJKRZAK, CF SCHAFER, M WOLF, JA GRUNBERG, P FILIPKOWSKI, ME GUTIERREZ, CJ KREBS, JJ PRINZ, GA AF ANKNER, JF SCHREYER, A ZABEL, H BORCHERS, JA MAJKRZAK, CF SCHAFER, M WOLF, JA GRUNBERG, P FILIPKOWSKI, ME GUTIERREZ, CJ KREBS, JJ PRINZ, GA TI POLARIZED NEUTRON REFLECTIVITY STUDIES OF BIQUADRATIC COUPLING IN [FE/CR] (100) AND [FE/AL] (100) SUPERLATTICES AND FILMS (INVITED) (ABSTRACT) SO JOURNAL OF APPLIED PHYSICS LA English DT Meeting Abstract C1 RUHR UNIV BOCHUM, FAK PHYS & ASTRON, D-44780 BOCHUM, GERMANY. NIST, DIV REACTOR RADIAT, GAITHERSBURG, MD 20899 USA. FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, D-52425 JULICH, GERMANY. USN, RES LAB, WASHINGTON, DC 20375 USA. RP UNIV MISSOURI, RES REACTOR, COLUMBIA, MO 65211 USA. RI Zabel, Hartmut/C-1994-2009 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 15 PY 1994 VL 76 IS 10 BP 7092 EP 7092 DI 10.1063/1.358038 PN 2 PG 1 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800356 ER PT J AU FETTERER, FM GINERIS, D KWOK, R AF FETTERER, FM GINERIS, D KWOK, R TI SEA-ICE TYPE MAPS FROM ALASKA SYNTHETIC-APERTURE RADAR FACILITY IMAGERY - AN ASSESSMENT SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article AB Synthetic aperture radar (SAR) imagery received at the Alaska SAR Facility is routinely and automatically classified on the Geophysical Processor System (GPS) to create ice type maps. We evaluated the wintertime performance of the GPS classification algorithm by comparing ice type percentages from supervised classification with percentages from the algorithm. The RMS difference for multiyear ice is about 6%, while the inconsistency in supervised classification is about 3%. The algorithm separates first-year from multiyear ice well, although it sometimes fails to correctly classify new ice and open water owing to the wide distribution of backscatter for these classes. Our results imply a high degree of accuracy and consistency in the growing archive of multiyear and first-year ice distribution maps. These results have implications for heat and mass balance studies which are furthered by the ability to accurately characterize ice type distributions over a large part of the Arctic. C1 SVERDRUP TECHNOL,BAY ST LOUIS,MS 39529. CALTECH,JET PROP LAB,PASADENA,CA 91109. RP FETTERER, FM (reprint author), USN,RES LAB,REMOTE SENSING APPLICAT BRANCH,BAY ST LOUIS,MS 39529, USA. RI Kwok, Ron/A-9762-2008 OI Kwok, Ron/0000-0003-4051-5896 NR 21 TC 29 Z9 29 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 NOV 15 PY 1994 VL 99 IS C11 BP 22443 EP 22458 DI 10.1029/94JC01911 PG 16 WC Oceanography SC Oceanography GA PR668 UT WOS:A1994PR66800006 ER PT J AU YOUNG, DK KINDLE, JC AF YOUNG, DK KINDLE, JC TI PHYSICAL PROCESSES AFFECTING AVAILABILITY OF DISSOLVED SILICATE FOR DIATOM PRODUCTION IN THE ARABIAN SEA SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article ID WESTERN INDIAN-OCEAN; SEASONAL CIRCULATION; NUTRIENT-UPTAKE; SOMALI CURRENT; ANNUAL CYCLE; MIXED-LAYER; PHYTOPLANKTON; MODEL; SEDIMENTS; DYNAMICS AB A passive tracer to represent dissolved silicate concentrations, with biologically realistic uptake kinetics, is successfully incorporated into a three-dimensional, eddy-resolving, ocean circulation model of the Indian Ocean. Hypotheses are tested to evaluate physical processes which potentially affect the availability of silicate for diatom production in the Arabian Sea. An alternative mechanism is offered to the idea that open ocean upwelling is primarily responsible for the high, vertical nutrient flux and consequent large-scale phytoplankton bloom in the northwestern Arabian Sea during the southwest monsoon. Model results show that dissolved silicate in surface waters available for uptake by diatoms is primarily influenced by the intensity of nearshore upwelling from southwest monsoonal wind forcing and by the offshore advective transport of surface waters. The upwelling, which in the model occurs within 200 +/- 50 km of the coast, appears to be a result of a combination of coastal upwelling, Ekman pumping, and divergence of the coastal flow as it turns offshore. Localized intensifications of silicate concentrations appear to be hydrodynamically driven and geographically correlated to coastal topographic features. The absence of diatoms in sediments of the eastern Arabian Basin is consistent with modeled distributional patterns of dissolved silicate resulting from limited westward advection of upwelled coastal waters from the western continental margin of India and rapid uptake of available silicate by diatoms. Concentrations of modeled silicate become sufficiently low to become unavailable for diatom production in the eastern Arabian Sea, a region between 61 degrees E and 70 degrees E at 8 degrees N on the south, with the east and west boundaries converging on the north at similar to 67 degrees E, 20 degrees N. RP YOUNG, DK (reprint author), USN,RES LAB,DIV OCEANOG,MAIL CODE 7331,BAY ST LOUIS,MS 39529, USA. NR 67 TC 43 Z9 43 U1 1 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 NOV 15 PY 1994 VL 99 IS C11 BP 22619 EP 22632 DI 10.1029/94JC01449 PG 14 WC Oceanography SC Oceanography GA PR668 UT WOS:A1994PR66800019 ER PT J AU KRAMER, LS LANGAN, TJ PICKENS, JR LAST, H AF KRAMER, LS LANGAN, TJ PICKENS, JR LAST, H TI DEVELOPMENT OF AL-MG-LI ALLOYS FOR MARINE APPLICATIONS SO JOURNAL OF MATERIALS SCIENCE LA English DT Article AB Based on the promising properties of a family of Al-Mg-Li alloys known as Weldalite(R) 050 alloys, a series of experimental variants were fabricated and evaluated. After being cast, extruded into rectangular bars, and heat treated, a series of mechanical tests was performed to select a composition for marine applications. The alloy variant selected as the most promising candidate displays tensile properties of 438 MPa yield strength, 543 MPa ultimate tensile strength, 5% elongation and 79 GPa elastic modulus, with excellent corrosion and stress corrosion cracking resistance at a density of 2.51 gcm(-3). C1 USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903. RP KRAMER, LS (reprint author), MARTIN MARIETTA CORP LABS,BALTIMORE,MD 21227, USA. NR 23 TC 2 Z9 3 U1 0 U2 2 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 NOV 15 PY 1994 VL 29 IS 22 BP 5826 EP 5832 DI 10.1007/BF00366863 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA PU793 UT WOS:A1994PU79300011 ER PT J AU COHEN, RE MEHL, MJ PAPACONSTANTOPOULOS, DA AF COHEN, RE MEHL, MJ PAPACONSTANTOPOULOS, DA TI TIGHT-BINDING TOTAL-ENERGY METHOD FOR TRANSITION AND NOBLE-METALS SO PHYSICAL REVIEW B LA English DT Note ID EMBEDDED-ATOM-METHOD; VACANCY FORMATION ENERGY; MOLECULAR-DYNAMICS; ALUMINUM; ALLOYS; POTENTIALS; SILICON; MODEL C1 CTR HIGH PRESSURE RES, WASHINGTON, DC 20015 USA. USN, RES LAB, COMPLEX SYST THEORY BRANCH, WASHINGTON, DC 20375 USA. RP CARNEGIE INST WASHINGTON, GEOPHYS LAB, 5251 BROAD BRANCH RD NW, WASHINGTON, DC 20015 USA. RI Cohen, Ronald/B-3784-2010; Mehl, Michael/H-8814-2016 OI Cohen, Ronald/0000-0001-5871-2359; NR 44 TC 171 Z9 171 U1 1 U2 18 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD NOV 15 PY 1994 VL 50 IS 19 BP 14694 EP 14697 DI 10.1103/PhysRevB.50.14694 PG 4 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700102 ER PT J AU FILIPPI, C SINGH, DJ UMRIGAR, CJ AF FILIPPI, C SINGH, DJ UMRIGAR, CJ TI ALL-ELECTRON LOCAL-DENSITY AND GENERALIZED-GRADIENT CALCULATIONS OF THE STRUCTURAL-PROPERTIES OF SEMICONDUCTORS SO PHYSICAL REVIEW B LA English DT Article ID CORRELATION-ENERGY; FUNCTIONAL THEORY; EXCHANGE ENERGY; APPROXIMATION; SOLIDS; ACCURATE; ATOMS; GAS C1 USN, RES LAB, COMPLEX SYST BRANCH, WASHINGTON, DC 20375 USA. CORNELL UNIV, CTR THEORY, ITHACA, NY 14853 USA. RP CORNELL UNIV, ATOM & SOLID STATE PHYS LAB, ITHACA, NY 14853 USA. RI Singh, David/I-2416-2012 NR 45 TC 124 Z9 126 U1 2 U2 10 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD NOV 15 PY 1994 VL 50 IS 20 BP 14947 EP 14951 DI 10.1103/PhysRevB.50.14947 PG 5 WC Physics, Condensed Matter SC Physics GA PV865 UT WOS:A1994PV86500023 ER PT J AU HICKS, JC GAMMEL, JT AF HICKS, JC GAMMEL, JT TI IMPROVED MEAN-FIELD SCHEME FOR THE HUBBARD-MODEL SO PHYSICAL REVIEW B LA English DT Note ID 1/N EXPANSION METHOD RP HICKS, JC (reprint author), USN COMMAND,CTR CONTROL & OCEAN SURVEILLANCE,DIV RES DEV TESTING & EVALUAT,MAT RES BRANCH,SAN DIEGO,CA 92152, USA. NR 9 TC 1 Z9 1 U1 0 U2 1 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 NOV 15 PY 1994 VL 50 IS 20 BP 15381 EP 15384 DI 10.1103/PhysRevB.50.15381 PG 4 WC Physics, Condensed Matter SC Physics GA PV865 UT WOS:A1994PV86500072 ER PT J AU BASTIEN, JL KISER, WR AF BASTIEN, JL KISER, WR TI CERVICAL ASSESSMENT AND PRETERM DELIVERY SO LANCET LA English DT Letter RP BASTIEN, JL (reprint author), USN HOSP,DEPT FAMILY MED,JACKSONVILLE,FL 32214, 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 NOV 12 PY 1994 VL 344 IS 8933 BP 1375 EP 1375 PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA PQ926 UT WOS:A1994PQ92600062 PM 7968063 ER PT J AU FEY, AL GAUME, RA NEDOLUHA, GE CLAUSSEN, MJ AF FEY, AL GAUME, RA NEDOLUHA, GE CLAUSSEN, MJ TI VLA SPECTRAL-LINE OBSERVATIONS OF THE H-II COMPLEX G34.3+0.2 SO ASTROPHYSICAL JOURNAL LA English DT Article DE H II REGIONS; ISM, INDIVIDUAL (G34.3+0.2); RADIO LINES, ISM; STARS, FORMATION ID MOLECULAR CORE; AMMONIA OBSERVATIONS; CHAMPAGNE PHASE; HOT CORE; REGIONS; RECOMBINATION; EMISSION; MAPS AB Four H II regions have been previously detected toward the H II complex G34.3+0.2 in the radio continuum. Three of these regions (components A, B, and C) are ultracompact. The fourth, G34.3+0.2 component D, is an approximate to 1' (1.1 pc at 3.8 kpc) diameter ringlike H II region. We have observed the H93 alpha radio recombination line emission with approximate to 11'' spatial resolution and the 1.3 cm water maser emission with approximate to 4'' spatial resolution toward G34.3+0.2. The observed radio recombination line emission suggests that component D is an expanding shell source. The inferred expansion velocity of 5 km s(-1) gives a calculated lifetime of similar to 10(5) yr. The continuum emission from the source is preferentially brightened on one side. We suggest that this asymmetric brightness distribution may be explained by the expansion of the H II region into an anisotropic medium. Alternatively, the increased brightness on the northwestern side could be the result of the superposition of two different H II regions. The average LSR velocity of the shell source has been determined to be 53.9+/-0.1 km s(-1). The observed spatial distribution of the H2O masers in the G34.3+0.2 complex has identified two new regions of star formation which are not associated with any radio continuum emission. C1 NATL RADIO ASTRON OBSERV,SOCORRO,NM 87801. RP FEY, AL (reprint author), USN,RES LAB,DIV REMOTE SENSING,CODE 7210,WASHINGTON,DC 20375, USA. NR 31 TC 21 Z9 21 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 NOV 10 PY 1994 VL 435 IS 2 BP 738 EP 747 DI 10.1086/174851 PN 1 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PQ970 UT WOS:A1994PQ97000020 ER PT J AU STEIMANCAMERON, TY YOUNG, K SCARGLE, JD CRUTCHFIELD, JP IMAMURA, JN WOLFF, MT WOOD, KS AF STEIMANCAMERON, TY YOUNG, K SCARGLE, JD CRUTCHFIELD, JP IMAMURA, JN WOLFF, MT WOOD, KS TI DRIPPING HANDRAILS AND THE QUASI-PERIODIC OSCILLATIONS OF THE AM-HERCULIS OBJECTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, CLOSE; HYDRODYNAMICS; NOVAE, CATACLYSMIC VARIABLES; STARS, OSCILLATIONS ID DRIVEN RADIATIVE SHOCKS; NOISE; DWARFS AB AM Her objects exhibit periodic, quasi-periodic, and aperiodic variability on timescales ranging from seconds to years. Here, we investigate a process for the production of aperiodic and quasi-periodic accretion rate fluctuations. We consider the nonlinear dynamical model known as the dripping handrail (DHR). The DHR, basically a model for certain types of spatially extended systems and loosely based on water condensing on and dripping off a handrail, has recently been used as a model for the quasi-periodic oscillations and very low frequency noise of the low-mass X-ray binary Sco X-1. Here, we show that (1) the DHR is a robust QPO generation process in that it leads to QPO production under a wide range of conditions and assumptions; (2) the phenomenology of the DHR is consistent with the observed aperiodic and quasi-periodic variability of the AM Her QPO source VV Pup over timescales ranging from 16 ms to 20 a; and (3) a single DHR model can produce both broadband QPOs and features with quality Q > 20 as observed in several AM Her QPO sources. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV OREGON,INST THEORET SCI,EUGENE,OR 97403. UNIV OREGON,DEPT PHYS,EUGENE,OR 97403. USN,RES LAB,WASHINGTON,DC 20375. RP STEIMANCAMERON, TY (reprint author), NASA,AMES RES CTR,CTR THEORET STUDIES,MOFFETT FIELD,CA 94035, USA. NR 14 TC 9 Z9 9 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 NOV 10 PY 1994 VL 435 IS 2 BP 775 EP 783 DI 10.1086/174855 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PQ970 UT WOS:A1994PQ97000024 ER PT J AU STERLING, AC DOSCHEK, GA PIKE, CD AF STERLING, AC DOSCHEK, GA PIKE, CD TI FE-XXV TEMPERATURES IN FLARES FROM THE YOKKOH BRAGG CRYSTAL SPECTROMETER SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATOMIC PROCESSES; SUN, FLARES; SUN, FUNDAMENTAL PARAMETERS; SUN, X-RAYS, GAMMA RAYS ID DIELECTRONIC SATELLITE SPECTRA; SOLAR-FLARE; EMISSION; CALCIUM; IRON AB Studies by Doschek et al. using P78-1 and SMM data have shown that the ratio of intensities of the Fe XXV and Ca XIX resonance lines can be expressed as a function of Fe XXV temperature. Using a more recent data set consisting of 13 flares observed by the Bragg crystal spectrometer (BCS) experiment on board Yohkoh, we find a nearly identical functional relationship between the same resonance line ratios and Fe XXV temperatures. We use this functional relationship to obtain resonance line ratio temperatures (T-RLR) for each flare in our data set, and compare them with temperatures resulting from application of a simple spectral fitting method (T-SSF) to individual Fe XXV spectra. We also use a more involved free-parameter spectral fitting method to deduce temperatures (T-FSF) from some of these spectra. On average, agreement between T-RLR and T-SSF improves as a flare progresses in time, with average agreements of 10.0% +/- 5.2%, 6.4% +/- 5.4%, and 5.0% +/- 3.9% over the rise, peak, and decay phases, respectively. Deviations between T-RLR and T-FSF are about the same or smaller. Thus, for most analysis purposes, all three methods yield virtually identical temperatures in flares. The somewhat poorer agreement between T-SSF and T-RLR during the earlier phases may be partially a result of difficulties in obtaining precise values for temperatures from spectral fits when blueshifts and large nonthermal broadenings are present in the spectra. Because of the high sensitivity of the Yohkoh BCS compared to that of BCS experiments on earlier spacecraft, we can for the first time consistently observe the heating phase of flares in Fe XXV. C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. COMPUTAT PHYS INC,FAIRFAX,VA 22031. NR 19 TC 11 Z9 11 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 NOV 10 PY 1994 VL 435 IS 2 BP 898 EP 908 DI 10.1086/174871 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PQ970 UT WOS:A1994PQ97000040 ER PT J AU WANG, YM AF WANG, YM TI POLAR PLUMES AND THE SOLAR-WIND SO ASTROPHYSICAL JOURNAL LA English DT Article DE HYDRODYNAMICS; SOLAR WIND; SUN, CORONA; SUN, MAGNETIC FIELDS ID CORONAL HOLES; TRANSITION REGION; ABUNDANCES; FLUX AB The mass flow within a polar plume is modeled including the effect of coronal heating and radiative losses. In addition to the ''global'' heating (on a scale H-m similar to R(.)) required to drive high-speed wind from the plume and interplume regions of the polar coronal hole, we find that a large amount of energy must be dissipated very near the coronal base to produce the high plasma densities observed in plumes. This concentrated heating, over a scale H-b much less than R(.), results in a steep temperature gradient with a local temperature maximum just above the plume base, where the gas is essentially stagnant; at greater heights, the plume is cooler than the interplume region. Although the mass flux densities are somewhat higher within the plumes, the interplume regions occupy most of the polar hole area and are therefore the main source of the high-speed polar wind. RP USN, RES LAB, EO HULBURT CTR SPACE RES, CODE 7672W, WASHINGTON, DC 20375 USA. NR 21 TC 82 Z9 83 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 NOV 10 PY 1994 VL 435 IS 2 BP L153 EP L156 DI 10.1086/187617 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PQ973 UT WOS:A1994PQ97300019 ER PT J AU WILLIAMS, KJ ESMAN, RD AF WILLIAMS, KJ ESMAN, RD TI STIMULATED BRILLOUIN-SCATTERING FOR IMPROVEMENT OF MICROWAVE FIBEROPTIC LINK EFFICIENCY SO ELECTRONICS LETTERS LA English DT Article DE OPTICAL CONTROL OF MICROWAVES; STIMULATED BRILLOUIN SCATTERING ID PHOTODETECTOR; FIBER AB Stimulated Brillouin scattering is used to increase the modulation depth of a weakly-modulated optical signal by rejecting the forward travelling carrier power. For an input power of eight times the stimulated Brillouin threshold, an improvement of 8 dB in link loss from 0.1 to 20GHz is achieved. RP WILLIAMS, KJ (reprint author), USN,RES LAB,OPT TECHNIQUES BRANCH,CODE 5672,WASHINGTON,DC 20375, USA. NR 10 TC 42 Z9 43 U1 0 U2 1 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 NOV 10 PY 1994 VL 30 IS 23 BP 1965 EP 1966 DI 10.1049/el:19941344 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA PV483 UT WOS:A1994PV48300046 ER PT J AU BUCHOLTZ, F WANG, G KIRKENDALL, CK VILLARUEL, CA DAVIS, AR DAGENAIS, DM MCVICKER, JA PATRICK, SS KOO, KP ANDERSEN, A VALO, H GJESSING, R EIDEM, EJ KNUDSEN, T AF BUCHOLTZ, F WANG, G KIRKENDALL, CK VILLARUEL, CA DAVIS, AR DAGENAIS, DM MCVICKER, JA PATRICK, SS KOO, KP ANDERSEN, A VALO, H GJESSING, R EIDEM, EJ KNUDSEN, T TI UNDERSEA PERFORMANCE OF 8-ELEMENT FIBER OPTIC MAGNETOMETER ARRAY SO ELECTRONICS LETTERS LA English DT Article DE FIBER OPTIC SENSORS; MAGNETOMETERS AB An array of fibre-optic, three-axis magnetic sensors was developed and operated undersea for a period of one year. The array comprises eight fibre sub-microradian interferometers each containing three magnetostrictive transducers for magnetic field detection and two piezoelectric transducers for quadrature control and nonmagnetic data transmission. C1 NORWEGIAN DEF RES ESTAB,DIV ELECTR,N-2007 KJELLER,NORWAY. NORWEGIAN DEF RES ESTAB,DIV UNDERWATER DEF,N-3191 HORTEN,NORWAY. UNIV RES FDN,GREENBELT,MD. VIRGINIA POLYTECH INST & STATE UNIV,BLACKSBURG,VA 24061. SFA INC,LANDOVER,MD. RP BUCHOLTZ, F (reprint author), USN,RES LAB,FIBER OPT ENVIRONM SENSORS SECT,CODE 5675,WASHINGTON,DC 20375, USA. NR 5 TC 3 Z9 4 U1 1 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 NOV 10 PY 1994 VL 30 IS 23 BP 1974 EP 1975 DI 10.1049/el:19941320 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA PV483 UT WOS:A1994PV48300052 ER PT J AU BOOS, JB KRUPPA, W PARK, D SHANABROOK, BV BENNETT, BR AF BOOS, JB KRUPPA, W PARK, D SHANABROOK, BV BENNETT, BR TI 0.2-MU-M ALSB/INAS HEMTS WITH 5V GATE BREAKDOWN VOLTAGE SO ELECTRONICS LETTERS LA English DT Article DE HIGH ELECTRON MOBILITY TRANSISTORS; INDIUM COMPOUNDS; ALUMINUM COMPOUNDS; IMPACT IONIZATION AB DC and microwave measurements on AlSb/InAs HEMTs with a gate length of 0.2 mum are reported. The reverse gate characteristics exhibit relatively low gate leakage current and gate-drain breakdown voltages as high as 5V. Equivalent circuit modelling yields an f(T) of 110GHz after removal of the gate bonding pad capacitance. The bias dependence of f(max) is examined indicating a significant reduction in the unilateral gain due to impact ionisation. C1 SFA INC,LANDOVER,MD 20785. RP BOOS, JB (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Bennett, Brian/A-8850-2008 OI Bennett, Brian/0000-0002-2437-4213 NR 4 TC 7 Z9 7 U1 1 U2 1 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 NOV 10 PY 1994 VL 30 IS 23 BP 1983 EP 1984 DI 10.1049/el:19941316 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA PV483 UT WOS:A1994PV48300058 ER PT J AU GOLDEN, MS KNUPFER, M KIELWEIN, M BUCHGEISTER, M FINK, J TEEHAN, D PICKETT, WE SINGH, DJ AF GOLDEN, MS KNUPFER, M KIELWEIN, M BUCHGEISTER, M FINK, J TEEHAN, D PICKETT, WE SINGH, DJ TI A RESONANT-PHOTOEMISSION STUDY OF YNI2B2C SO EUROPHYSICS LETTERS LA English DT Article ID D-BAND PHOTOEMISSION; NI AB Valence level photoemission measurements of the normal-state electronic structure of the new boro-carbide intermetallic superconductor YNi2B2C are presented. The behaviour of the Ni-dominated valence band peak at 1.4 eV binding energy and the states at E(F) across the Ni3p absorption threshold clearly indicate significant Ni3d contributions at these energies. In addition, the transfer of spectral weight from the main Ni3d valence band to a two-hole bound-state satellite at approximately 8 eV signals the role played by electron correlation in these materials. The peak in the DOS predicted to lie at E(F) in band structure calculations is not observed in the experiment, possibly also due to the effects of electron correlation. C1 DRAL,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND. USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375. RP GOLDEN, MS (reprint author), IFW DRESDEN EV,INST FESTKORPERFORSCH,POSTFACH 270016,D-01171 DRESDEN,GERMANY. RI Golden, Mark/D-3469-2011; Singh, David/I-2416-2012; Fink, Joerg/A-6003-2012 NR 20 TC 23 Z9 23 U1 0 U2 0 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD NOV 10 PY 1994 VL 28 IS 5 BP 369 EP 374 DI 10.1209/0295-5075/28/5/013 PG 6 WC Physics, Multidisciplinary SC Physics GA PT466 UT WOS:A1994PT46600013 ER PT J AU SCHULTZ, WW HUH, J GRIFFIN, OM AF SCHULTZ, WW HUH, J GRIFFIN, OM TI POTENTIAL-ENERGY IN STEEP AND BREAKING WAVES SO JOURNAL OF FLUID MECHANICS LA English DT Article ID DEEP-WATER WAVES; GRAVITY-WAVES; NUMERICAL-METHOD; DEFORMATION; HYDROFOIL AB We find that the RMS wave height (square root of the potential energy) rather than peak-to-peak wave height is a better experimental and analytic criterion for determining when a regular, two-dimensional deep-water wave will break. A spectral algorithm for two-dimensional potential flow is developed and used to compare breaking onset criteria for energy input from (i) converging sidewalls, (ii) a submerged disturbance, and (iii) wave focusing. We also find that wave-breaking criteria (potential energy or the more classical peak-to-peak wave height) are a function of the rate of energy input. Large plunging waves occur when energy input rates are large. As energy input rates become smaller there is a smooth transition to smaller spilling waves. The various energy input methods show similar breaking trends in the limit as the energy input rate becomes small - waves break when the potential energy becomes approximately 52% of the energy for the most energetic Stokes wave, with the formation of a singularity immediately before the crest. The effects of wave modulation and reflection are briefly discussed and shown not to affect the potential energy breaking criterion significantly. The experimental scatter of the RMS wave height is shown to be half that of wave steepness during incipient breaking in wave packets. C1 USN,RES LAB,DIV REMOTE SENSING,WASHINGTON,DC 20375. RP SCHULTZ, WW (reprint author), UNIV MICHIGAN,DEPT MECH ENGN & APPL MECH,ANN ARBOR,MI 48109, USA. NR 47 TC 23 Z9 23 U1 0 U2 1 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 NOV 10 PY 1994 VL 278 BP 201 EP 228 DI 10.1017/S0022112094003678 PG 28 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA PU344 UT WOS:A1994PU34400009 ER PT J AU SPARGO, BJ TESTOFF, MA NIELSEN, TB STENGER, DA HICKMAN, JJ RUDOLPH, AS AF SPARGO, BJ TESTOFF, MA NIELSEN, TB STENGER, DA HICKMAN, JJ RUDOLPH, AS TI SPATIALLY CONTROLLED ADHESION, SPREADING, AND DIFFERENTIATION OF ENDOTHELIAL-CELLS ON SELF-ASSEMBLED MOLECULAR MONOLAYERS SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE SURFACE MODIFICATION; PHOTOLITHOGRAPHY; ANGIOGENESIS; FIBRONECTIN ID ANGIOGENESIS INVITRO; GROWTH; MODULATION; SUBSTRATA; OUTGROWTH; BEHAVIOR; PEPTIDES AB Chemically modified glass substrates were used to demonstrate differential adhesion, growth, and differentiation of endothelial cells. Endothelial cells were examined for adhesion and growth on glass, glass treated with N-(2-aminoethyl)-3-aminopropyl trimethoxysilane (EDA), or EDA with a subsequent treatment with physically adsorbed extracellular matrix components human fibronectin and heparin sulfate. EDA and EDA/human fibronectin showed similar abilities to support adhesion, spreading, and proliferation of endothelial cells. In contrast, heparin sulfate inhibited endothelial cell adhesion to EDA. Differentiation of endothelial cells resulting in precapillary cord formation was triggered by addition of basic fibroblast growth factor (bFGF), On EDA and EDA/human fibronectin bFGF causes confluent endothelial cell monolayers to differentiate and form cords, which resulted in a large-scale spatial redistribution of cells on the surface. Formation of organized neovascular assemblies was demonst ated on coplanar molecular patterns of EDA and a nonadhesive perfluorinated alkylsilane (tridecafluoro-1,1,2,2-tetrahydrooctyl)-1-dimethylchlorosilane (13F). Endothelial cells preferentially adhered to the EDA lines and after 24-48 hr, microfilaments aligned with the long axes of the patterned EDA region. Finally, endothelial cells that became confluent within the confines of the EDA region (bound by the nonadhesive, 13F domains) were observed to differentiate into neovascular cords in long-term culture (7-10 days) with bFGF. C1 USN,MED RES INST,WOUND REPAIR ENHANCEMENT PROGRAM,BETHESDA,MD 20889. SCI APPLICAT INT CORP,MCLEAN,VA 22102. RP SPARGO, BJ (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,CODE 6900,WASHINGTON,DC 20035, USA. NR 27 TC 105 Z9 106 U1 0 U2 6 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD NOV 8 PY 1994 VL 91 IS 23 BP 11070 EP 11074 DI 10.1073/pnas.91.23.11070 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PQ938 UT WOS:A1994PQ93800065 PM 7972011 ER PT J AU THORPE, TP WEIMER, RA FREITAS, JA AF THORPE, TP WEIMER, RA FREITAS, JA TI NOVEL TECHNIQUE FOR GROWTH-ETCH CYCLING OF FLAME-DEPOSITED DIAMOND FILMS SO APPLIED PHYSICS LETTERS LA English DT Article ID OXYGEN AB We have developed a novel technique for growth-etch cycling of diamond films deposited with an oxygen-acetylene torch, whereby a spinning wheel with removable teeth periodically disrupts the depositing flame in open atmosphere to allow air etching of a heated substrate. Cycling times as short as 0.02 s, with a growth/etch time ratio of approximately 19, have produced films with macro-Raman peak widths (full width at half-maximum) of approximately 3 cm(-1). A predominance of large 100 crystal faces, with dimensions up to 300 mu m, is evident in optimized films. (C) 1993 American Institute of Physics. C1 SACHS FREEMAN ASSOCIATES INC,LANDOVER,MD 20785. RP THORPE, TP (reprint author), USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375, USA. NR 7 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 NOV 7 PY 1994 VL 65 IS 19 BP 2490 EP 2492 DI 10.1063/1.112647 PG 3 WC Physics, Applied SC Physics GA PQ174 UT WOS:A1994PQ17400039 ER PT J AU LEE, GU CHRISEY, LA COLTON, RJ AF LEE, GU CHRISEY, LA COLTON, RJ TI DIRECT MEASUREMENT OF THE FORCES BETWEEN COMPLEMENTARY STRANDS OF DNA SO SCIENCE LA English DT Article ID MICROSCOPY; OLIGONUCLEOTIDES; MOLECULES AB Interaction forces between single strands of DNA were measured with the atomic force microscope by a procedure in which DNA oligonucleotides were covalently attached to a spherical probe and surface. Adhesive forces measured between complementary 20-base strands fell into three distinct distributions centered at 1.52, 1.11, and 0.83 nano-newtons, which are associated with the rupture of the interchain interaction between a single pair of molecules involving 20, 16, and 12 base pairs, respectively. When a third long DNA molecule was coupled between complementary surfaces, both intra- and interchain forces were observed. The intrachain interaction resulting from the molecule's elasticity manifested itself as a long-range cohesive force.z C1 USN, RES LAB, CTR BIOMOLEC SCI & ENGN, WASHINGTON, DC 20375 USA. RP LEE, GU (reprint author), USN, RES LAB, DIV CHEM, CODE 6177, WASHINGTON, DC 20375 USA. RI Lee, Gil/P-8696-2016 OI Lee, Gil/0000-0002-7949-5848 NR 28 TC 689 Z9 698 U1 5 U2 98 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 J9 SCIENCE JI Science PD NOV 4 PY 1994 VL 266 IS 5186 BP 771 EP 773 DI 10.1126/science.7973628 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PP753 UT WOS:A1994PP75300029 PM 7973628 ER PT J AU ROMER, AK COLLINS, CA BOHRINGER, H CRUDDACE, RG EBELING, H MACGILLIVRAY, HT VOGES, W AF ROMER, AK COLLINS, CA BOHRINGER, H CRUDDACE, RG EBELING, H MACGILLIVRAY, HT VOGES, W TI THE LARGE-SCALE DISTRIBUTION OF X-RAY-CLUSTERS OF GALAXIES SO NATURE LA English DT Article ID COLD DARK MATTER; RICH CLUSTERS; REDSHIFT SURVEY; ABELL CLUSTERS; UNIVERSE; CATALOG; APM AB CLUSTERS of galaxies are not distributed randomly in space, but are themselves clustered, reflecting inhomogeneities in the early Universe(1). The degree of clustering-usually expressed as a correlation length, which measures the characteristic scale for clustering-can therefore be used to determine the size of the initial density fluctuations that gave rise to the clusters(1-3). Optical studies of galaxy clusters(4-7) have indicated a correlation length that conflicts with the predictions of some theories of large-scale structure formation(1-3), leading to the suggestion that these optical samples are biased in that foreground or background galaxies not physi ically associated with a cluster are counted as part of it(8-10). Here we report a measurement of the correlation length for a sample of clusters that were selected based on their X-ray emission, which is free from the bias that is inherent to optical studies. We find a correlation length of 13-15 h(-1) Mpc, where h is the Hubble constant in units of 100 km s(-1) Mpc(-1). There is no evidence for clusters being significantly elongated along the line of sight, contrary to previous suggestions(11,12). C1 NORTHWESTERN UNIV, DEPT PHYS & ASTRON, EVANSTON, IL 60208 USA. LIVERPOOL JOHN MOORES UNIV, ASTROPHYS GRP, LIVERPOOL L3 3AF, MERSEYSIDE, ENGLAND. MAX PLANCK INST EXTRATERR PHYS, W-8046 GARCHING, GERMANY. USN, RES LAB, WASHINGTON, DC 20375 USA. UNIV CAMBRIDGE, INST ASTRON, CAMBRIDGE CB3 0HA, ENGLAND. ROYAL OBSERV, EDINBURGH EH9 3HJ, MIDLOTHIAN, SCOTLAND. RP ROMER, AK (reprint author), UNIV DURHAM, DEPT PHYS, SOUTH RD, DURHAM DH1 3LE, ENGLAND. NR 25 TC 55 Z9 55 U1 0 U2 0 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD NOV 3 PY 1994 VL 372 IS 6501 BP 75 EP 77 DI 10.1038/372075a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PQ348 UT WOS:A1994PQ34800072 ER PT J AU BERZINS, V AF BERZINS, V TI SOFTWARE MERGE - SEMANTICS OF COMBINING CHANGES TO PROGRAMS SO ACM TRANSACTIONS ON PROGRAMMING LANGUAGES AND SYSTEMS LA English DT Article DE LANGUAGES; DOMAINS; SEMANTICS; SOFTWARE CHANGE MERGING; SOFTWARE MAINTENANCE AB We present a language-independent semantic model of the process of combining changes to programs. This model extends the domains used in denotational semantics (complete partial orders) to Boolean algebras, and represents incompatible modifications as well as compatible extensions. The model is used to define the intended semantics of change-merging operations on programs and to establish some general properties of software merging. We determine conditions under which changes to subprograms of a software system can be merged independently and illustrate cases where this is not possible. RP BERZINS, V (reprint author), USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 26 TC 14 Z9 14 U1 0 U2 0 PU ASSOC COMPUTING MACHINERY PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 SN 0164-0925 J9 ACM T PROGR LANG SYS JI ACM Trans. Program. Lang. Syst. PD NOV PY 1994 VL 16 IS 6 BP 1875 EP 1903 DI 10.1145/197320.197403 PG 29 WC Computer Science, Software Engineering SC Computer Science GA QG480 UT WOS:A1994QG48000010 ER PT J AU CONKLIN, BJ SELLERS, SP FITZGERALD, JP YEE, GT AF CONKLIN, BJ SELLERS, SP FITZGERALD, JP YEE, GT TI IRON(II) OCTAETHYLTETRAAZAPORPHYRIN, FEOETAP, A CANTED FERROMAGNET WITH TC =5.6-K SO ADVANCED MATERIALS LA English DT Note ID PARAMAGNETIC ANISOTROPY; MAGNETIC-SUSCEPTIBILITY; ELECTRONIC-STRUCTURE; PORPHYRINS; STATE; PHTHALOCYANINES; MOSSBAUER AB Communication: A four-coordinate azaporphyrin, FeOETAP (see Figure), is reported that has temperature- and field-dependent properties different from those of other four-coordinate iron(II) porphyrins and related macrocycles, displaying an apparent canted ferromagnetic state. This behavior is compared to that of M2+ (OETAP), where M = Mn, Co, Ni, Cu, and Zn. C1 USN ACAD,DEPT CHEM,ANNAPOLIS,MD 21402. RP CONKLIN, BJ (reprint author), UNIV COLORADO,DEPT CHEM & BIOCHEM,BOULDER,CO 80309, USA. NR 16 TC 15 Z9 15 U1 2 U2 4 PU VCH PUBLISHERS INC PI DEERFIELD BEACH PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788 SN 0935-9648 J9 ADV MATER JI Adv. Mater. PD NOV PY 1994 VL 6 IS 11 BP 836 EP 838 DI 10.1002/adma.19940061105 PG 3 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA PT276 UT WOS:A1994PT27600004 ER PT J AU TAO, SY MCKENNA, TM AF TAO, SY MCKENNA, TM TI IN-VITRO ENDOTOXIN EXPOSURE INDUCES CONTRACTILE DYSFUNCTION IN ADULT-RAT CARDIAC MYOCYTES SO AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY LA English DT Article DE 3',5'-CYCLIC MONOPHOSPHATE; PHOSPHODIESTERASES; GUANYLATE CYCLASE; SEPTIC SHOCK ID NITRIC-OXIDE SYNTHASE; VASCULAR SMOOTH-MUSCLE; SEPTIC SHOCK; MYOCARDIAL DEPRESSION; INDUCTION; CELLS; SENSITIVITY; CYTOKINES; HUMANS; MODEL AB In vivo endotoxin treatment causes a nitric oxide-mediated hypocontractility in cardiac myocytes. The objective of this study was to assess whether in vitro endotoxin exposure confers similar contractile defects in adult rat cardiac cells. We found that incubation of cardiac myocytes for 6 h with 10-100 ng/ml endotoxin resulted in progressive time- and protein synthesis-dependent decreases in electrically stimulated twitch magnitudes and increased contraction and relaxation times. Serum was not required for the endotoxin-induced hypocontractility. The endotoxin-induced defect in contractility was reversed over time, since myocytes continuously incubated with endotoxin for 24 h exhibited normal contractility; in contrast, control cells incubated for 18 h were suppressed by a subsequent 6-h exposure to endotoxin. Nitric oxide synthase activity was increased after a 6-h endotoxin treatment as evidenced by a dose-dependent enhanced conversion of [H-3]arginine to [H-3]citrulline and by elevated guanosine 3',5'-cyclic monophosphate levels. Superfusion of endotoxin-incubated cells with N-omega-nitro-L-arginine methyl ester restored contractile function, whereas superfusion with L-arginine reimposed abnormal contractility. Naive myocytes superfused with 8-bromoguanosine 3',5'-cyclic monophosphate expressed contractile defects similar to those induced by endotoxin. These findings demonstrate that endotoxin has direct negative effects on cardiac cell contractile function and that induction of NO synthase activity is a primary intracellular mediator of the diminished contractility. C1 USN, MED RES INST, SEPT SHOCK RES PROGRAM, BETHESDA, MD 20889 USA. NR 35 TC 48 Z9 48 U1 0 U2 1 PU AMER PHYSIOLOGICAL SOC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0363-6135 J9 AM J PHYSIOL-HEART C JI Am. J. Physiol.-Heart Circul. Physiol. PD NOV PY 1994 VL 267 IS 5 BP H1745 EP H1752 PG 8 WC Cardiac & Cardiovascular Systems; Physiology; Peripheral Vascular Disease SC Cardiovascular System & Cardiology; Physiology GA PW588 UT WOS:A1994PW58800014 ER PT J AU CRNKOVICH, FM TIRMAN, P GOUMAS, C HELMS, C AF CRNKOVICH, FM TIRMAN, P GOUMAS, C HELMS, C TI SPONTANEOUS OSTEOMYELITIS IN AN ATHLETE - MR FINDINGS SO AMERICAN JOURNAL OF ROENTGENOLOGY LA English DT Letter ID PUBIS C1 SAN FRANCISCO MAGNET RESONANCE CTR,SAN FRANCISCO,CA 94118. UNIV CALIF SAN FRANCISCO,SAN FRANCISCO,CA 94143. RP CRNKOVICH, FM (reprint author), USN,HOSP OAKLAND,OAKLAND,CA 94627, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 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 NOV PY 1994 VL 163 IS 5 BP 1268 EP 1269 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA PQ817 UT WOS:A1994PQ81700061 PM 7976924 ER PT J AU SHWAYHAT, AF LINENGER, JM HOFHERR, LK SLYMEN, DJ JOHNSON, CW AF SHWAYHAT, AF LINENGER, JM HOFHERR, LK SLYMEN, DJ JOHNSON, CW TI PROFILES OF EXERCISE HISTORY AND OVERUSE INJURIES AMONG UNITED-STATES-NAVY SEA, AIR, AND LAND (SEAL) RECRUITS SO AMERICAN JOURNAL OF SPORTS MEDICINE LA English DT Article AB This prospective study examined running history as a risk factor for subsequent overuse injury in Navy Sea, Air, and Land (SEAL) recruits. Recruits preparing to be Navy SEALs undergo 6 months of rigorous physical training programs, which place these recruits at high risk for developing an overuse injury. We assessed the independent variables of age; prior running frequency, duration, and pace; and training surface. Univariate and multivariate estimates of risk were determined for each variable. We observed an incidence of 3.4 overuse injuries per 1000 recruit-days. Assessing the physical activity of the recruits in the 6 months before entrance into basic training, we found that the recruits who ran at a pace slower than 8 minutes per mile and on softer training surfaces were more likely to sustain an overuse injury during basic training, in both univariate and multivariate estimates of risk. Recruits who ran fewer weekly miles and for shorter durations before basic training were also more likely to sustain an overuse injury according to univariate estimates of risk. Our findings suggest that risk of overuse injuries can be reduced by adjusting exercise routines before training. Running on different type surfaces with a gradual increase in speed, duration, and weekly mileage in the period preceding basic training may reduce risk of overuse injury. RP SHWAYHAT, AF (reprint author), USN,HLTH RES CTR,DEPT EPIDEMIOL,DIV HLTH SCI,POB 85122,SAN DIEGO,CA 92186, USA. NR 0 TC 19 Z9 19 U1 1 U2 2 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 NOV-DEC PY 1994 VL 22 IS 6 BP 835 EP 840 DI 10.1177/036354659402200616 PG 6 WC Orthopedics; Sport Sciences SC Orthopedics; Sport Sciences GA PR855 UT WOS:A1994PR85500016 PM 7856809 ER PT J AU MCELROY, PD BEIER, JC OSTER, CN BEADLE, C SHERWOOD, JA OLOO, AJ HOFFMAN, SL AF MCELROY, PD BEIER, JC OSTER, CN BEADLE, C SHERWOOD, JA OLOO, AJ HOFFMAN, SL TI PREDICTING OUTCOME IN MALARIA - CORRELATION BETWEEN RATE OF EXPOSURE TO INFECTED MOSQUITOS AND LEVEL OF PLASMODIUM-FALCIPARUM PARASITEMIA SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID PERMETHRIN-IMPREGNATED CURTAINS; NETS PREVENT MALARIA; TREATED BED NETS; WESTERN KENYA; AREA AB The level of Plasmodium falciparum parasitemia at clinical presentation has repeatedly been shown to correlate with severity of disease. Using data collected in western Kenya over 21 months, we examined associations between exposure variables, especially exposure to infective mosquitoes, and prevalence and density of P. falciparum parasitemia among 1,007 children six months to six years of age. The prevalence of P. falciparum infection was similar at all exposure levels, but there was a correlation between exposure to sporozoite-infected mosquitoes over the previous 28-day period, and geometric mean parasite density of each cohort (Spearman rank coefficient = 0.724, P = 0.002). The relative odds of having a parasite density greater than or equal to 5,000/mu l was increased almost two-fold among individuals exposed to more than 10 infective bites during the prior 28-day period. Children enrolled during the highest incidence period were 80% more likely to have a density greater than or equal to 5,000/mu l relative to individuals enrolled during periods of lower incidence. The data suggest that measures, such as malaria vaccines, that reduce parasite densities by limiting numbers of sporozoites reaching the liver, or merozoites released from the liver, will reduce malaria-associated morbidity and mortality, even when they do not prevent all infections. C1 USN,MED RES INST,MALARIA PROGRAM,ROCKVILLE,MD 20852. JOHNS HOPKINS UNIV,SCH HYG & PUBL HLTH,DEPT IMMUNOL & INFECT DIS,BALTIMORE,MD 21205. KENYA GOVT MED RES CTR,VECTOR BIOL & CONTROL RES CTR,KISUMU,KENYA. USA,MED RES UNIT,NAIROBI,KENYA. KENYA GOVT MED RES CTR,NAIROBI,KENYA. WALTER REED ARMY INST RES,DEPT IMMUNOL,WASHINGTON,DC. FU NIAID NIH HHS [AI-29000] NR 18 TC 58 Z9 58 U1 0 U2 0 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 NOV PY 1994 VL 51 IS 5 BP 523 EP 532 PG 10 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA PW466 UT WOS:A1994PW46600002 PM 7985743 ER PT J AU LUCAS, CM FRANKE, ED CACHAY, MI TEJADA, A CARRIZALES, D KREUTZER, RD AF LUCAS, CM FRANKE, ED CACHAY, MI TEJADA, A CARRIZALES, D KREUTZER, RD TI LEISHMANIA (VIANNIA) LAINSONI - FIRST ISOLATION IN PERU SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID IDENTIFICATION; PSYCHODIDAE AB Surveys were conducted from 1986 through 1992 to define the etiology and geographic distribution of human leishmaniasis in Peru. Lesion aspirates and skin biopsies were obtained from clinically diagnosed cases of leishmaniasis and tested for promastigotes by standard culture techniques. The isozyme profile of the isolates was determined by the cellulose acetate electrophoresis technique. Data indicated that the isozyme profiles for Leishmania isolates from six patients were similar to that of reference strains of L. lainsoni. These results are the first reported evidence of L. lainsoni and the first association of this parasite with human cases of cutaneous leishmaniasis in Peru. C1 USN,MED RES INST DETACHMENT,LIMA,PERU. USN,MED RES INST,BETHESDA,MD 20889. DANIEL A CARRION UNIV SAN MARCOS,INST TROP MED,LIMA,PERU. CENT MIL HOSP,LIMA,PERU. YOUNGSTOWN STATE UNIV,DEPT BIOL,YOUNGSTOWN,OH 44555. RI Villasante, Eileen/G-3602-2011 NR 10 TC 12 Z9 14 U1 0 U2 1 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 NOV PY 1994 VL 51 IS 5 BP 533 EP 537 PG 5 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA PW466 UT WOS:A1994PW46600003 PM 7985744 ER PT J AU HOFFMAN, SL EDELMAN, R BRYAN, JP SCHNEIDER, I DAVIS, J SEDEGAH, M GORDON, D CHURCH, P GROSS, M SILVERMAN, C HOLLINGDALE, M CLYDE, D SZTEIN, M LOSONSKY, G PAPARELLO, S JONES, TR AF HOFFMAN, SL EDELMAN, R BRYAN, JP SCHNEIDER, I DAVIS, J SEDEGAH, M GORDON, D CHURCH, P GROSS, M SILVERMAN, C HOLLINGDALE, M CLYDE, D SZTEIN, M LOSONSKY, G PAPARELLO, S JONES, TR TI SAFETY, IMMUNOGENICITY, AND EFFICACY OF A MALARIA SPOROZOITE VACCINE ADMINISTERED WITH MONOPHOSPHORYL LIPID A, CELL-WALL SKELETON OF MYCOBACTERIA, AND SQUALANE AS ADJUVANT SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID PLASMODIUM-FALCIPARUM SPOROZOITES; CIRCUMSPOROZOITE PROTEIN; MURINE MALARIA; ANTIBODIES; HUMANS; INFECTION; REGION AB A Plasmodium falciparum circumsporozoite protein (PfCSP) recombinant fusion protein, R32NS1(81), formulated with monophosphoryl lipid A, cell wall skeleton of mycobacteria, and squalane (Detox(TM)) was administered to 12 volunteers. One volunteer had malaise and self-limited painful induration at the injection site after the second dose and declined further immunization. The other 11 volunteers tolerated the three doses of 1,230 mu g of vaccine, but most complained of sore arms; in five cases the pain or malaise was severe enough to interfere with work or sleep. Two weeks after the third dose of vaccine, four of the 11 immunized volunteers had greater than or equal to 14 mu g/ml of antibodies to the repeat region of the PfCSP in their serum. Two of these four volunteers did not develop P. falciparum parasitemia when challenged by the bite of five mosquitoes carrying P. falciparum sporozoites. The seven volunteers with lower levels of antibodies and 11 of 11 controls developed parasitemia. These data are consistent with other studies, and indicate that vaccine-induced antibodies against the repeat region of PfCSP can prevent effective sporozoite infection of hepatocytes in humans. The challenge is to improve the immunogenicity of PfCSP-based vaccines, and to develop methods for including PfCSP peptides as components of multitarget malaria vaccines. C1 UNIV MARYLAND, CTR VACCINE DEV, SCH MED, BALTIMORE, MD 21201 USA. UNIFORMED SERV UNIV HLTH SCI, DEPT PREVENT MED & BIOMETR, BETHESDA, MD 20814 USA. WALTER REED ARMY MED CTR, WALTER REED ARMY INST RES, DEPT ENTOMOL, WASHINGTON, DC 20307 USA. WALTER REED ARMY MED CTR, WALTER REED ARMY INST RES, DEPT IMMUNOL, WASHINGTON, DC 20307 USA. SMITHKLINE BEECHAM PHARMACEUT, DEPT MACROMOLEC SCI, KING OF PRUSSIA, PA 19406 USA. NATL NAVAL MED CTR, DIV INFECT DIS, BETHESDA, MD 20889 USA. PAN AMER HLTH ORG, WASHINGTON, DC USA. BIOMED RES INST, ROCKVILLE, MD USA. RP HOFFMAN, SL (reprint author), USN, MED RES INST, MALARIA PROGRAM, MED RES INST ANNEX, 12300 WASHINGTON AVE, ROCKVILLE, MD 20852 USA. FU PHS HHS [N0-1-AL-62528] NR 18 TC 55 Z9 56 U1 1 U2 3 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 NOV PY 1994 VL 51 IS 5 BP 603 EP 612 PG 10 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA PW466 UT WOS:A1994PW46600013 PM 7985753 ER PT J AU LONG, GW JONES, TR RICKMAN, LS FRIES, L EGAN, J WELLDE, B HOFFMAN, SL AF LONG, GW JONES, TR RICKMAN, LS FRIES, L EGAN, J WELLDE, B HOFFMAN, SL TI ACRIDINE-ORANGE DIAGNOSIS OF PLASMODIUM-FALCIPARUM - EVALUATION AFTER EXPERIMENTAL-INFECTION SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID MALARIA AB The value and role of the acridine orange/microhematocrit tube method (quantitative buffy coat [QBC(R)] analysis) in the diagnosis of malaria remains controversial. To establish the true sensitivity of this test in comparison with the thick blood film, we studied 49 subjects who were experimentally infected with Plasmodium falciparum in 10 malaria vaccine and infectivity trials. Diagnosis was made by the acridine orange staining method 1-3 days earlier than by the thick blood film in 23 subjects (47%) and at the same time as the thick blood film in 20. On the other hand, diagnosis was made by thick blood film earlier than by the acridine orange staining method in six individuals. There were no false positive results using acridine orange among 584 specimens studied. Diagnosis was made using acridine orange at a parasitemia of less than 11 parasites/mu l of blood in 65% of cases. Where available, the acridine orange assay is clearly preferable in terms of speed and accuracy to the thick blood film for diagnosis with parasitemias of less than 150/mu l of blood, and perhaps as important, for ruling out infection with P. falciparum in a symptomatic patient. C1 NATL NAVAL MED CTR, BETHESDA, MD USA. JOHNS HOPKINS UNIV, CTR VACCINE RES, SCH HYG & PUBL HLTH, BALTIMORE, MD 21205 USA. WALTER REED ARMY INST RES, DEPT IMMUNOL, WASHINGTON, DC USA. RP LONG, GW (reprint author), USN, MED RES INST, MALARIA PROGRAM, 8901 WISCONSIN AVE, BETHESDA, MD 20889 USA. NR 9 TC 12 Z9 12 U1 0 U2 0 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 NOV PY 1994 VL 51 IS 5 BP 613 EP 616 PG 4 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA PW466 UT WOS:A1994PW46600014 PM 7985754 ER PT J AU ACOSTA, JA FOURNIER, TK KNUTSON, CO RAGLAND, JJ AF ACOSTA, JA FOURNIER, TK KNUTSON, CO RAGLAND, JJ TI COLONOSCOPIC EVALUATION OF RECTAL BLEEDING IN YOUNG-ADULTS SO AMERICAN SURGEON LA English DT Article ID GASTROINTESTINAL-TRACT; COLORECTAL-CANCER; BLOOD-LOSS; DIAGNOSIS; IMPACT; MANAGEMENT; BOWEL; ENEMA; COLON AB The role of colonoscopy in the evaluation of blood loss per rectum has been studied extensively in older patients but not in the younger adult population. The objective of this study was to review the diagnostic yield of colonoscopy in patients 40 years of age or younger with passage of minimal amounts of bright red blood per rectum or occult blood positive stools. Retrospectively, 5924 colonoscopic examinations were reviewed. All patients, 40 years of age or younger, with rectal bleeding as the only indication for colonoscopy were selected. A total of 280 patients met these criteria and 59 (21%) had significant findings. Polyps were present in 25 (8.9%) of patients. Other findings included colitis, diverticular disease, and angiodysplastic lesions present in 8.6 per cent, 2.1 per cent, and 1.1 per cent, respectively. Adenocarcinoma was present in one patient (0.03%). These results suggest that colonoscopy in patients 40 years of age or younger with rectal bleeding may be justified because significant findings may be present in up to 21 per cent of patients. C1 USN,MED CTR,DEPT GEN SURG,SAN DIEGO,CA 92134. RP ACOSTA, JA (reprint author), USN,MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. NR 23 TC 20 Z9 22 U1 0 U2 0 PU SOUTHEASTERN SURGICAL CONGRESS PI ATLANTA PA 1776 PEACHTREE RD, NW., SUITE 410N, ATLANTA, GA 30309-2352 SN 0003-1348 J9 AM SURGEON JI Am. Surg. PD NOV PY 1994 VL 60 IS 11 BP 903 EP 906 PG 4 WC Surgery SC Surgery GA PP444 UT WOS:A1994PP44400024 PM 7978692 ER PT J AU CROWLEY, JP METZGER, J ASSAF, A CARLETON, RC MERRILL, E VALERI, CR AF CROWLEY, JP METZGER, J ASSAF, A CARLETON, RC MERRILL, E VALERI, CR TI LOW-DENSITY-LIPOPROTEIN CHOLESTEROL AND WHOLE-BLOOD VISCOSITY SO ANNALS OF CLINICAL AND LABORATORY SCIENCE LA English DT Article ID HEART-DISEASE; RISK-FACTORS; FIBRINOGEN; RHEOLOGY; SERUM; COAGULATION; AGGREGATION; LDL AB Whole blood viscosity (WBV) was measured in a normal population and was analyzed in relation to packed cell volume, (hematocrit, PCV), fibrinogen, white blood cell count (WBC), platelet count, and plasma lipids, including total cholesterol, triglycerides, high density lipoprotein cholesterol (HDLc) and low density lipoprotein cholesterol (LDLc). Conventional assays were used for all blood and lipid measurements. Whole blood viscosity was measured under disaggregating conditions with a disposable, porous bed viscometer. As expected, the strongest correlation was seen between WBV and PCV (r = 0.78, p < 0.001). Significant positive correlations also were demonstrated between WBV and cholesterol (r = 0.22, p < 0.001), triglycerides (r = 0.14, p < 0.001) and LDLc (r = 0.21, p < 0.001). A significant negative correlation was found between HDLc and WBV (r = -0.20, p < 0.001). Correlation analysis by sex showed only the correlation of LDLc was significant for both men and women. A stepwise multiple regression analysis of WBV indicated that LDLc, fibrinogen (Fbg) and platelet (Plt) counts correlated independently of PCV to WBV. The equation derived from multiple regression and partial correlation analysis was: WBV (mPa.sec) = -9.317 + 0.0047 (LDLc) + 0.381 (PCV) + 0.00152 (Plt) + 0.0021 (Fbg) The calculated mean specific contribution of PCV was 90.8 percent, LDLc 3.5 percent, and fibrinogen 3.3 percent to observed mean WBV. This study shows that LDLc is the principal lipoprotein independently influencing whole blood viscosity and its effect is similar in magnitude to fibrinogen. Further studies to elucidate the mechanism and clinical significance of the effects of LDLc on WBV are indicated. C1 BROWN UNIV,DEPT MED,PROVIDENCE,RI 02903. BROWN UNIV,DEPT COMMUNITY HLTH,PROVIDENCE,RI 02903. MEM HOSP,DIV HLTH EDUC,PAWTUCKET,RI. BOSTON UNIV,SCH MED,USN,BLOOD RES LAB,BOSTON,MA 02118. MEM HOSP,DEPT CARDIOL,PROVIDENCE,RI. MIT,CAMBRIDGE,MA 02139. RP CROWLEY, JP (reprint author), RHODE ISL HOSP,DIV CLIN HEMATOL,593 EDDY ST,PROVIDENCE,RI 02903, USA. FU NHLBI NIH HHS [KO7 HLO125901A1, HL23629] NR 26 TC 25 Z9 25 U1 0 U2 1 PU INST CLINICAL SCIENCE INC PI PHILADELPHIA PA 1833 DELANCEY PLACE, PHILADELPHIA, PA 19103 SN 0091-7370 J9 ANN CLIN LAB SCI JI Ann. Clin. Lab. Sci. PD NOV-DEC PY 1994 VL 24 IS 6 BP 533 EP 541 PG 9 WC Medical Laboratory Technology SC Medical Laboratory Technology GA PN372 UT WOS:A1994PN37200007 PM 7847781 ER PT J AU SAHIN, I HYMAN, MC NGUYEN, TC AF SAHIN, I HYMAN, MC NGUYEN, TC TI 3-DIMENSIONAL FLOW AROUND A SUBMERGED BODY IN FINITE-DEPTH WATER SO APPLIED MATHEMATICAL MODELLING LA English DT Article DE FINITE-DEPTH; 3-DIMENSIONAL AB The three-dimensional fluid flow around an axisymmetric body submerged in a finite-depth fluid is calculated by an analytical/numerical method based on a Green's function formulation. The flow around a submerged axisymmetric body, such as the infinite-fluid analogue of a Rankine body, can be constructed by superposition of a source and a sink along the axis of symmetry. Analytical evaluation is complicated because of the singular Cauchy-type principal-value integrals with infinite and semi-infinite limits. In this study these integrals are evaluated by using a set of adaptive numerical quadratures. This approach is direct, and it does not require an asymptotic expansion. The results for the three-dimensional flow calculations are applied for the evaluation of pressure signatures of several Rankine-type bodies with different Froude numbers. Streamlines were determined by a second-order finite-difference algorithm that follows a fluid particle by solving an appropriate initial-value problem. As expected, the shape distortion from the infinite-fluid Rankine body geometry was significant when the slenderness and the linearity (small-wave elevation and slope) approximations became inappropriate. C1 USN,CTR SURFACE WARFARE,COASTAL SYST STN,PANAMA CITY,FL 32401. RP SAHIN, I (reprint author), WESTERN MICHIGAN UNIV,DEPT MECH & AERONAUT ENGN,KALAMAZOO,MI 49008, USA. NR 15 TC 7 Z9 10 U1 0 U2 1 PU BUTTERWORTH-HEINEMANN PI WOBURN PA 225 WILDWOOD AVE #UNITB PO BOX 4500, WOBURN, MA 01801-2084 SN 0307-904X J9 APPL MATH MODEL JI Appl. Math. Model. PD NOV PY 1994 VL 18 IS 11 BP 611 EP 619 DI 10.1016/0307-904X(94)90319-0 PG 9 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications; Mechanics SC Engineering; Mathematics; Mechanics GA PJ577 UT WOS:A1994PJ57700003 ER PT J AU OSAKO, CY ULMER, MP GRABELSKY, DA PURCELL, WR STRICKMAN, MS JOHNSON, WN KINZER, RL KURFESS, JD JUNG, GV AF OSAKO, CY ULMER, MP GRABELSKY, DA PURCELL, WR STRICKMAN, MS JOHNSON, WN KINZER, RL KURFESS, JD JUNG, GV TI OSSE OBSERVATIONS OF NGC-1275 IN THE 0.05-10.0-MEV RANGE SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INDIVIDUAL (NGC 1275); GALAXIES, MAGNETIC FIELDS; GALAXIES NUCLEI; GAMMA RAYS, OBSERVATIONS ID PERSEUS CLUSTER; RAY; NGC-1275; IRON AB We made observations of NGC 1275 with the Compton Gamma-Ray Observatory's Oriented Scintillation Spectrometer Experiment between 1991 November 28 and December 12. We did not detect the source during this viewing period. Our 3 sigma upper limit to a detection in the similar to 50-90 keV range is 6 x 10(-6) photons cm(-2) s(-1) keV(-1). This flux is more than 10 times lower than the 3 sigma detection in the same energy range reported by Rothschild et al. for their OSO 7 observations. Our results are discussed in comparison with radio observations and models for the X-ray emission, and we show that it is likely that most of the greater than or similar to 10 keV photons come from the nuclear region of NGC 1275. We find no significant correlation between the variable radio intensity and the hard X-ray flux of the entire NGC 1275 source. Simultaneous Very Large Baseline Array and gamma-ray observations are needed to test the self-Compton synchrotron models for gamma-ray emission from the core of NGC 1275. Our results also provide a lower limit to the magnetic field of similar to 2 x 10(-7) gauss for the similar to 5' radio source centered on NGC 1275. C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. UNIV SPACE RES ASSOC,WASHINGTON,DC. RP OSAKO, CY (reprint author), NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208, USA. RI Johnson, Neil/G-3309-2014 NR 27 TC 9 Z9 9 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 NOV 1 PY 1994 VL 435 IS 1 BP 181 EP 184 DI 10.1086/174804 PN 1 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PP151 UT WOS:A1994PP15100018 ER PT J AU VAUGHAN, BA VANDERKLIS, M WOOD, KS NORRIS, JP HERTZ, P MICHELSON, PF VANPARADIJS, J LEWIN, WHG MITSUDA, K PENNINX, W AF VAUGHAN, BA VANDERKLIS, M WOOD, KS NORRIS, JP HERTZ, P MICHELSON, PF VANPARADIJS, J LEWIN, WHG MITSUDA, K PENNINX, W TI SEARCHES FOR MILLISECOND PULSATIONS IN LOW-MASS X-RAY BINARIES .2. SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, CLOSE; METHODS, NUMERICAL; STARS, NEUTRON; STARS, OSCILLATIONS; X-RAYS, STARS ID QUASI-PERIODIC OSCILLATIONS; 6.1-MS PULSAR; MULTIWAVELENGTH CAMPAIGN; NEUTRON STARS; CYGNUS X-2; EMISSION; EVOLUTION; BRIGHT; GINGA; IUE AB Coherent millisecond X-ray pulsations are expected from low-mass X-ray binaries (LMXBs), but remain undetected. Using the single-parameter Quadratic Coherence Recovery Technique (QCRT) to correct for unknown binary orbit motion, we have performed Fourier transform searches for coherent oscillations in all long, continuous segments of data obtained at 1 ms time resolution during Ginga observations of LMXB. We have searched the six known Z sources (GX 5-1, Cyg X-2, Sco X-1, GX 17+2, GX 340+0, and GX 349+2), seven pf the 14 known atoll sources (GX 3+1, GX 9+1, GX 9+9, 1728-33. 1820-30, 1636-53 and 1608-52), the ''peculiar'' source Cir X-1, and the high-mass binary Cyg X-3. We find no evidence for coherent pulsations in any of these sources, with 99% confidence limits on the pulsed fraction between 0.3% and 5.0% at frequencies below the Nyquist frequency of 512 Hz. A key assumption made in determining upper limits in previous searches is shown to be incorrect. We provide a recipe for correctly setting upper limits and detection thresholds. Finally we discuss and apply two strategies to improve sensitivity by utilizing multiple, independent, continuous segments of data with comparable count rates. C1 USN, RES LAB, EO HULBURT CTR SPACE RES, WASHINGTON, DC 20375 USA. NASA, GODDARD SPACE FLIGHT CTR, HIGH ENERGY ASTROPHYS LAB, GREENBELT, MD 20771 USA. STANFORD UNIV, DEPT PHYS, STANFORD, CA 94305 USA. UNIV ALABAMA, HUNTSVILLE, AL 35899 USA. MIT, CTR SPACE RES, CAMBRIDGE, MA 02139 USA. INST SPACE & ASTRONAUT SCI, SAGAMIHARA, KANAGAWA 229, JAPAN. RP VAUGHAN, BA (reprint author), UNIV AMSTERDAM, CTR HIGH ENERGY ASTROPHYS, ASTRON INST ANTON PANNEKOEK, KRUISLAAN 403, 1098 SJ AMSTERDAM, NETHERLANDS. RI Mitsuda, Kazuhisa/C-2649-2008 NR 38 TC 127 Z9 127 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 1 PY 1994 VL 435 IS 1 BP 362 EP 371 DI 10.1086/174818 PN 1 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PP151 UT WOS:A1994PP15100032 ER PT J AU BENKA, SG HOLMAN, GD AF BENKA, SG HOLMAN, GD TI A THERMAL/NONTHERMAL MODEL FOR SOLAR HARD X-RAY-BURSTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCELERATION OF PARTICLES; MHD; RADIATION MECHANISMS, NONTHERMAL; RADIATION MECHANISMS, THERMAL; SUN, FLARES; SUN, X-RAYS, GAMMA RAYS ID THERMAL NONTHERMAL MODEL; RUNAWAY ELECTRONS; MICROWAVE-BURSTS; FLARES; ACCELERATION; SPECTRA; SOFT; ATMOSPHERES; POPULATIONS; COMPONENT AB A formalism is developed for analyzing high-resolution hard X-ray spectra, incorporating the coexistence of thermal and nonthermal bremsstrahlung. The two processes are physically linked by the presence of electric currents, which both heat the surrounding plasma via Joule dissipation and accelerate electrons via the runaway process. We use this formalism to analyze the flare of 1980 June 27 and find that both the gradual and spike components of the hard X-ray emission are consistent with runaway acceleration. We also find that significant heating is observed only in the gradual component. The electric field is always sub-Dreicer, the maximum total potential drop in the acceleration region is found to be similar to 100 kV in two of the spikes, and the average accelerated electron flux is similar to 10(34) electrons s(-1). We argue that classical resistivity is a valid assumption for this event and find the density in the current channels (similar to 10(11) cm(-3)) and a lower limit on the volume of the heated plasma. We find that the ratio of the electric field to the Dreicer field (epsilon = E/E(D)) varies systematically, whereas the value of E alone does not. We also find that the acceleration region fragmented into many current/return current pairs, and that the fragmentation varied systematically. We also discuss further implications of this model. C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. RP BENKA, SG (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 767B,WASHINGTON,DC 20375, USA. RI Holman, Gordon/C-9548-2012 NR 53 TC 64 Z9 65 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 NOV 1 PY 1994 VL 435 IS 1 BP 469 EP 481 DI 10.1086/174829 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PP151 UT WOS:A1994PP15100043 ER PT J AU HINDMAN, EE PORCH, WM HUDSON, JG DURKEE, PA AF HINDMAN, EE PORCH, WM HUDSON, JG DURKEE, PA TI SHIP-PRODUCED CLOUD LINES OF 13 JULY 1991 SO ATMOSPHERIC ENVIRONMENT LA English DT Note DE SHIP TRAILS; SHIP-PRODUCED CLOUDS; SHIP EFFLUENTS ID TOPPED BOUNDARY-LAYERS; CONDENSATION NUCLEI; STRATUS; TRAILS AB On 13 July 1991, a well-defined cloud line produced by an unidentified steaming ship was detected in satellite imagery and was simultaneously photographed from the R/V EGABRAG III. The EGABRAG produced a much less well-defined cloud line. Measuremnts made from the EGABRAG revealed that the cloud lines formed in a shallow boundary layer which was nearly saturated, unstable, drizzling and nearly free of cloud condensation nuclei (CCN). The EGABRAG passed through the plume of the ship as indicated by elevated CCN concentrations coincident with the cloud line. Thereafter, both ships passed under a shallow stratus layer where background CCN concentrations increased significantly. Only the cloud line produced by the ship extended into the stratus layer; the EGABRAG did not affect the layer. The CCN and updraft from the ship were involved in the formation of the cloud line. In contrast, the CCN and updraft from the EGABRAG were insufficient to produce a well-defined cloud line. Production of the cloud lines appeared dependent on a combination of environmental conditions and ship-produced CCN and updrafts. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. DESERT RES INST,RENO,NV 89506. USN,MONTEREY,CA 93940. RP HINDMAN, EE (reprint author), CUNY CITY COLL,NEW YORK,NY 10031, USA. NR 22 TC 20 Z9 20 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1352-2310 J9 ATMOS ENVIRON JI Atmos. Environ. PD NOV PY 1994 VL 28 IS 20 BP 3393 EP 3403 DI 10.1016/1352-2310(94)00171-G PG 11 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA PW172 UT WOS:A1994PW17200017 ER PT J AU BROWN, CM SEELY, JF KANIA, DR HAMMEL, BA BACK, CA LEE, RW BARSHALOM, A BEHRING, WE AF BROWN, CM SEELY, JF KANIA, DR HAMMEL, BA BACK, CA LEE, RW BARSHALOM, A BEHRING, WE TI WAVELENGTHS AND ENERGY-LEVELS FOR THE ZN-I ISOELECTRONIC SEQUENCE SN20+ THROUGH U62+ SO ATOMIC DATA AND NUCLEAR DATA TABLES LA English DT Article ID RESONANCE LINES; CU-LIKE; IONS; SPECTRA; TRANSITIONS; PD AB Calculated and experimentally determined transition energies are presented for the Zn I isoelectronic sequence for the elements with atomic numbers Z = 50-92. The excitation energies were calculated for the 84 levels belonging to the 10 configurations of the type 4l4l' by using the Hebrew University Lawrence Livermore Atomic Code (HULLAC). The analysis of the energy level structure along the isoelectronic sequence accounted for 20 avoided level crossings. The differences between the calculated and experimental transition energies were determined for 16 transitions, and the excitation energies of the levels belonging to the 4s4p, 4p(2), 4s4d, and 4s4f configurations were derived from the semiempirically corrected transition energies. (C) 1994 Academic Press, Inc. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NUCL RES CTR NEGEV,IL-84190 BEER SHEVA,ISRAEL. NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. RP BROWN, CM (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 7674,WASHINGTON,DC 20375, USA. NR 16 TC 39 Z9 40 U1 0 U2 5 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0092-640X J9 ATOM DATA NUCL DATA JI Atom. Data Nucl. Data Tables PD NOV PY 1994 VL 58 IS 2 BP 203 EP 217 DI 10.1006/adnd.1994.1027 PG 15 WC Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Physics GA PP878 UT WOS:A1994PP87800002 ER PT J AU ELSMORE, TF AF ELSMORE, TF TI SYNWORK1 - A PC-BASED TOOL FOR ASSESSMENT OF PERFORMANCE IN A SIMULATED WORK-ENVIRONMENT SO BEHAVIOR RESEARCH METHODS INSTRUMENTS & COMPUTERS LA English DT Article ID TEST BATTERIES; MILLISECOND AB SYNWORK1 is a computer-based performance task that requires subjects to work simultaneously on four distinct subtasks involving memory, arithmetic processing, and visual and auditory monitoring. Difficulty levels, the payoff matrix, feedback levels, and component subtask mix are user selectable. Detailed data are automatically collected, and a suite of data analysis programs is available. SYNWORK1 is being used in sleep-deprivation and circadian desynchronization experiments and in a variety of clinical research applications. Representative data from a sleep-deprivation experiment are presented to demonstrate the sensitivity of the technique. The strategy used for programming concurrent tasks on a PC is described. C1 USN,HLTH RES CTR,SAN DIEGO,CA 92152. RP ELSMORE, TF (reprint author), WALTER REED ARMY INST RES,DIV NEUROPSYCHIAT,WASHINGTON,DC 20307, USA. NR 18 TC 51 Z9 51 U1 0 U2 1 PU PSYCHONOMIC SOC INC PI AUSTIN PA 1710 FORTVIEW RD, AUSTIN, TX 78704 SN 0743-3808 J9 BEHAV RES METH INSTR JI Behav. Res. Methods Instr. Comput. PD NOV PY 1994 VL 26 IS 4 BP 421 EP 426 DI 10.3758/BF03204659 PG 6 WC Psychology, Mathematical; Psychology, Experimental SC Psychology GA PT270 UT WOS:A1994PT27000007 ER PT J AU FETT, RW BURK, SD THOMPSON, WT KOZO, TL AF FETT, RW BURK, SD THOMPSON, WT KOZO, TL TI ENVIRONMENTAL PHENOMENA OF THE BEAUFORT SEA OBSERVED DURING THE LEADS EXPERIMENT SO BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY LA English DT Article ID ICE AB This paper describes unique environmental phenomena observed during LEADEX (Leads Experiment), a multidisciplinary investigation Staged from an ice camp in the Beaufort Sea during March and April 1992. The paperfocuses on phenomena observed by NOAA, DMSP, and the European ERS-1 satellites. The opening and closing of a lead is studied using the synthetic aperture radar (SAR) data aboard ERS-1. With a mesoscale model, the authors examine the three-dimensional nature of meteorological phenomena and their effect on the opening and closing of leads and show that this model is extremely useful for interpreting structures evident in satellite and in situ observations along northern Alaska. Storms or wind events, which result in leads and fractured ice, also cause ice flees to rotate; the authors document this rotation with automated weather stations anchored to the flees. Finally, the authors describe unique thermal streaks that appeared over a large area of the Beaufort Sea during strong northeasterly winds and explore their nature using multichannel satellite data. C1 USN, DIV MARINE METEOROL, MONTEREY, CA 93943 USA. SCI APPLICAT INT CORP, WATERSMEET, MI USA. NR 32 TC 20 Z9 20 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0003-0007 EI 1520-0477 J9 B AM METEOROL SOC JI Bull. Amer. Meteorol. Soc. PD NOV PY 1994 VL 75 IS 11 BP 2131 EP 2145 DI 10.1175/1520-0477(1994)075<2131:EPOTBS>2.0.CO;2 PG 15 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA PT572 UT WOS:A1994PT57200004 ER PT J AU MALONE, JL PAPARELLO, SF MALONE, JD HILL, HE CONRAD, KA MYERS, JW LILLIBRIDGE, SR WEISS, PJ AF MALONE, JL PAPARELLO, SF MALONE, JD HILL, HE CONRAD, KA MYERS, JW LILLIBRIDGE, SR WEISS, PJ TI DRUG SUSCEPTIBILITY OF MYCOBACTERIUM-TUBERCULOSIS ISOLATES FROM RECENT HAITIAN MIGRANTS - CORRELATION WITH CLINICAL-RESPONSE SO CLINICAL INFECTIOUS DISEASES LA English DT Note ID RESISTANCE AB Between November 1991 and June 1993, similar to 11,000 Haitian migrants were screened for active tuberculosis and human immunodeficiency virus type 1 (HIV-1) infection at the U.S. Naval Base in Guantanamo Bay, Cuba. Cultures of specimens from 37 of these patients yielded Mycobacterium tuberculosis; eight (22%) of these isolates were resistant to standard medications, including isoniazid (22%), rifampin (0), ethambutol (3%), and streptomycin (3%). Two isolates (5.4%) were resistant to two drugs simultaneously. All but one of 340 patients who were treated for presumptive active tuberculosis and who were followed up for about 1 month had a favorable initial clinical response to a standard four-drug regimen. Among 259 HIV-1-infected patients who had normal findings on screening chest radiographs and who received prophylaxis with isoniazid, there were 1.8 incident cases of active tuberculosis per 100 person-years; this rate was 76% lower than that (reported by others) among HIV-1-infected Haitian patients who were not treated with isoniazid. No serious toxic effects due to standard four-drug regimens or to prophylaxis with isoniazid were observed. These data suggest that standard empirical therapeutic interventions for tuberculosis are adequate and well tolerated in Haitian migrants. C1 USN HOSP, DIV INFECT DIS, OAKLAND, CA USA. USN HOSP, DIV INFECT DIS, SAN DIEGO, CA USA. USN HOSP, DIV FAMILY PRACTICE, JACKSONVILLE, FL USA. USN HOSP, DIV INFECT DIS, PORTSMOUTH, VA USA. CTR DIS CONTROL & PREVENT, NATL CTR ENVIRONM HLTH, DISASTER ASSESSMENT & EPIDEMIOL SECT, ATLANTA, GA USA. RP MALONE, JL (reprint author), NATL NAVAL MED CTR, DIV INFECT DIS, BETHESDA, MD 20889 USA. NR 11 TC 8 Z9 8 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 NOV PY 1994 VL 19 IS 5 BP 938 EP 940 PG 3 WC Immunology; Infectious Diseases; Microbiology SC Immunology; Infectious Diseases; Microbiology GA PT713 UT WOS:A1994PT71300021 PM 7893883 ER PT J AU PLAZEK, DJ BERO, CA NEUMEISTER, S FLOUDAS, G FYTAS, G NGAI, KL AF PLAZEK, DJ BERO, CA NEUMEISTER, S FLOUDAS, G FYTAS, G NGAI, KL TI VISCOELASTIC PROPERTIES OF AMORPHOUS POLYMERS .3. - LOW-MOLECULAR-WEIGHT POLY(METHYLPHENYLSILOXANE) SO COLLOID AND POLYMER SCIENCE LA English DT Article DE VISCOELASTICITY; CREEP COMPLIANCE; PHOTON CORRELATION SPECTROSCOPY; POLY(METHYLPHENYLSILOXANE) ID ANOMALOUS TEMPERATURE-DEPENDENCE; POLY(PHENYLMETHYL SILOXANE); CONCENTRATION FLUCTUATIONS; POLY(PROPYLENE GLYCOL); TERMINAL DISPERSIONS; GLASS-TRANSITION; RELAXATION; BEHAVIOR; DYNAMICS; DENSITY AB By making creep and recoverable creep measurements of a nearly monodisperse low molecular weight poly(methyl phenyl siloxane) sample, we have found on decreasing temperature towards T-g that there is continuously a change in the viscoelastic spectrum concomitant with a decrease of the steady-state recoverable compliance. This behavior is exactly the same as previously observed in low molecular weight poly(styrene), proving that this spectacular anomaly in the viscoelasticity of low molecular weight polymers is general and deserves an explanation. Photon correlation spectroscopic measurements performed on the same sample have extended the observation of the viscoelastic response to shorter times and the result corroborates the trend of variation established by the creep data. C1 FDN RES & TECHNOL HELLAS,IRAKLION,GREECE. USN,RES LAB,WASHINGTON,DC 20375. RP PLAZEK, DJ (reprint author), UNIV PITTSBURGH,DEPT MAT SCI & ENGN,PITTSBURGH,PA 15261, USA. RI Floudas, George/M-7985-2015 NR 29 TC 55 Z9 55 U1 2 U2 12 PU DR DIETRICH STEINKOPFF VERLAG PI BERLIN 33 PA C/O SPRINGER-VERLAG, HEIDELBERGER PLATZ 3, 1000 BERLIN 33, GERMANY SN 0303-402X J9 COLLOID POLYM SCI JI Colloid Polym. Sci. PD NOV PY 1994 VL 272 IS 11 BP 1430 EP 1438 DI 10.1007/BF00654173 PG 9 WC Chemistry, Physical; Polymer Science SC Chemistry; Polymer Science GA PT793 UT WOS:A1994PT79300013 ER PT J AU PATNAIK, G KAILASANATH, K AF PATNAIK, G KAILASANATH, K TI NUMERICAL SIMULATIONS OF BURNER-STABILIZED HYDROGEN-AIR FLAMES IN MICROGRAVITY SO COMBUSTION AND FLAME LA English DT Article; Proceedings Paper CT 25th International Symposium on Combustion CY JUL 31-AUG 05, 1994 CL IRVINE, CA AB Detailed two-dimensional, time-dependent numerical simulations have been performed to gain understanding of the similarities and differences in the structure and stability of burner-stabilized flames in zero and earth gravity. These simulations include the effects of fluid convection, detailed hydrogen-oxygen chemistry, multispecies diffusion, thermal conduction, viscosity, and heat losses to the burner. A series of simulations for a range of mixtures and inlet velocities have been performed. These simulations show the presence of cellular structures at the burner surface in both zero and earth gravity at high inlet velocities. As the inlet velocity is reduced, the flames move closer to the burner and the heat loss to the burner increases. At low inlet velocities, these cellular structures are suppressed in both zero gravity and earth gravity, indicating that increased heat loss to the burner is the primary mechanism stabilizing these flames. Downward propagating burner-stabilized flames become smoother more quickly than zero-gravity flames, indicating that gravity still plays a small part in stabilizing the flame. The simulations described here clarify the relative importance of gravity and heat losses to the burner on the stability of lean hydrogen-air flames. C1 BERKELEY RES ASSOCIATES INC,SPRINGFIELD,VA 22150. RP PATNAIK, G (reprint author), USN,RES LAB,CTR REACT FLOW & DYNAM SYST,COMPUTAT PHYS & FLUID DYNAM LAB,WASHINGTON,DC 20375, USA. NR 15 TC 21 Z9 22 U1 0 U2 3 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD NOV PY 1994 VL 99 IS 2 BP 247 EP 253 DI 10.1016/0010-2180(94)90128-7 PG 7 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA PR020 UT WOS:A1994PR02000008 ER PT J AU YU, KH SCHADOW, KC AF YU, KH SCHADOW, KC TI CAVITY-ACTUATED SUPERSONIC MIXING AND COMBUSTION CONTROL SO COMBUSTION AND FLAME LA English DT Article; Proceedings Paper CT 25th International Symposium on Combustion CY JUL 31-AUG 05, 1994 CL IRVINE, CA ID LAYERS; NUMBER; JETS; FLOW AB Compressible shear layers in supersonic jets are quite stable and spread very slowly compared with incompressible shear layers. In this paper, a novel use of a cavity-actuated forcing technique is demonstrated for increasing the spreading rate of compressible shear layers. Periodic modulations were applied to Mach 2.0 reacting and nonreacting jets using the cavities that were attached at the exit of a circular supersonic nozzle. The effect of cavity-actuated forcing was studied as a function of the cavity geometry, in particular, the length and the depth of the cavity. When the cavities were tuned to certain frequencies, large-scale highly coherent structures were produced in the shear layers substantially increasing the growth rate. The cavity excitation was successfully applied to both cold and hot supersonic jets. When applied to cold Mach 2.0 air jets, the cavity-actuated forcing increased the spreading rate of the initial shear layers with the convective Mach number (M(C)) of 0.85 by a factor of three. For high-temperature Mach 2.0 jets with M(C) of 1.4, a 50% increase in the spreading rate was observed with the forcing. Finally, the cavity-actuated forcing was applied to reacting supersonic jets with ethylene-oxygen afterburning. For this case, the forcing caused a 20%-30% reduction in the afterburning flame length and modified the afterburning intensity significantly. The direction of the modification depended on the characteristics of the afterburning flames. The intensity was reduced with forcing for unstable flames with weak afterburning while it was increased for stable flames with strong afterburning. RP YU, KH (reprint author), USN,CTR AIR WARFARE,RES DEPT,CHINA LAKE,CA 93555, USA. NR 19 TC 29 Z9 30 U1 0 U2 4 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD NOV PY 1994 VL 99 IS 2 BP 295 EP 301 DI 10.1016/0010-2180(94)90134-1 PG 7 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA PR020 UT WOS:A1994PR02000014 ER PT J AU AMUNDSON, DE WEISS, PJ ANDERSON, MD MYERS, M AF AMUNDSON, DE WEISS, PJ ANDERSON, MD MYERS, M TI SEVERE AEROMONAS INFECTION IN A PATIENT WITH ALCOHOLIC CIRRHOSIS OF THE LIVER SO COMPLICATIONS IN SURGERY LA English DT Note DE AEROMONAS HYDROPHILA; CIRRHOSIS; INFECTION, NECROTIZING; SEPSIS; INFECTION, SOFT TISSUE AB Aeromonas species have been increasingly recognized as causes of clinical diseases, usually gastroenteritis or soft tissue infections. The source for soft tissue infections is typically environmental contamination of a traumatic wound. We report a fulminant Aeromonas soft tissue infection acquired from soil exposure in a woman with alcoholic cirrhosis of the liver. She had no apparent skin disruption. This infection resulted in sepsis and death despite appropriate surgical and antibiotic therapy. RP AMUNDSON, DE (reprint author), USN,MED CTR,DEPT CRIT CARE MED,SAN DIEGO,CA, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SCP COMMUNICATIONS INC PI NEW YORK PA 134 W 29TH ST, NEW YORK, NY 10001-5304 SN 1053-749X J9 COMPLICATION SURG JI Complicat. Surg. PD NOV-DEC PY 1994 VL 13 IS 6 BP 769 EP 771 PG 3 WC Surgery SC Surgery GA PX740 UT WOS:A1994PX74000003 ER PT J AU LEWIS, T AF LEWIS, T TI SUPERCOMPUTERS AINT SO SUPER SO COMPUTER LA English DT Editorial Material RP LEWIS, T (reprint author), USN,POSTGRAD SCH,WASHINGTON,DC 20350, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 0018-9162 J9 COMPUTER JI Computer PD NOV PY 1994 VL 27 IS 11 BP 5 EP 6 PG 2 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA PR024 UT WOS:A1994PR02400001 ER PT J AU REED, RP GOLDA, M AF REED, RP GOLDA, M TI CRYOGENIC PROPERTIES OF UNIDIRECTIONAL COMPOSITES SO CRYOGENICS LA English DT Article DE UNIDIRECTIONAL COMPOSITES; FIBER REINFORCEMENT; PHYSICAL PROPERTIES; REVIEW ID FIBER-REINFORCED-PLASTICS; THERMOPLASTIC MATRICES; THERMAL-CONDUCTIVITY; TEMPERATURES; STRENGTH; EPOXY; LOADS AB The tensile, compressive, fatigue, thermal expansion, thermal conductivity and specific heat of unidirectional laminates reinforced with boron, alumina, aramid, S-glass, E-glass, and high strength, high modulus and medium modulus carbon fibres are reviewed. The ratio of strength to thermal conductivity is used to assess the suitability of various fibre-reinforced laminates for supporting struts (experiencing compression) or straps (experiencing tension) at cryogenic temperatures. The relationships between laminate properties and reinforcement fibres are discussed. C1 USN,CTR SURFACE WARFARE,CARDEROCK DIV,MACHINERY RES & DEV DIRECTORATE,ANNAPOLIS,MD 21402. RP REED, RP (reprint author), CRYOGEN MAT INC,2625 ILIFF,BOULDER,CO 80303, USA. NR 76 TC 61 Z9 69 U1 3 U2 24 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0011-2275 J9 CRYOGENICS JI Cryogenics PD NOV PY 1994 VL 34 IS 11 BP 909 EP 928 DI 10.1016/0011-2275(94)90077-9 PG 20 WC Thermodynamics; Physics, Applied SC Thermodynamics; Physics GA PQ119 UT WOS:A1994PQ11900002 ER PT J AU KANG, MH DIETZ, HG BHARGAVA, B AF KANG, MH DIETZ, HG BHARGAVA, B TI MULTIPLE-QUERY OPTIMIZATION AT ALGORITHM-LEVEL SO DATA & KNOWLEDGE ENGINEERING LA English DT Article DE DATABASE; OPTIMIZATION; MULTIPLE QUERIES AB The database multiple-query optimization can be achieved by analyzing multiple-query sequences at a level below that used by current optimizers, but above the low-level executable code. In this paper, the concept of the 'algorithm-level' representation of a database program is defined and optimization techniques that can be applied to the algorithm-level representation are discussed. Some techniques extend existing concepts, while others are new. In this paper, we also show multiple-query optimization can be performed across the update queries. C1 PURDUE UNIV,SCH ELECT ENGN,W LAFAYETTE,IN 47907. PURDUE UNIV,DEPT COMP SCI,W LAFAYETTE,IN 47907. RP KANG, MH (reprint author), USN,RES LAB,DIV INFORMAT TECHNOL,WASHINGTON,DC 20375, USA. NR 15 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-023X J9 DATA KNOWL ENG JI Data Knowl. Eng. PD NOV PY 1994 VL 14 IS 1 BP 57 EP 75 DI 10.1016/0169-023X(94)90009-4 PG 19 WC Computer Science, Artificial Intelligence; Computer Science, Information Systems SC Computer Science GA PW318 UT WOS:A1994PW31800004 ER PT J AU SHIFLER, DA MORAN, PJ KRUGER, J AF SHIFLER, DA MORAN, PJ KRUGER, J TI THE PASSIVE BEHAVIOR OF 304 STAINLESS-STEEL IN DIMETHOXYETHANE SOLUTIONS SO ELECTROCHIMICA ACTA LA English DT Article DE STAINLESS STEEL; PASSIVITY; ORGANIC SOLVENTS; DIMETHOXYETHANE; HEXAFLUOROARSENATE; SALT FILM ID ANHYDROUS PROPYLENE CARBONATE; LITHIUM CELLS; IRON; ELECTROPOLYMERIZATION AB 304 stainless steel, an alloy that is more corrosion resistant in aqueous solutions than carbon steel, was examined to assess the processes involved in forming a passive film in an aprotic, nonaqueous solvent such as dimethoxyethane (DME). Electrochemical tests show that the passive ranges of 304 stainless steel in ''dry'' DME solutions containing LiAsF6, LiClO4 and TBAP were similar. Breakdown of the passive state occurred above 1700-1800 mV (sce). The high anodic potentials were due to the expected superior nature of the air-formed film on 304 stainless steel. Removing the surface oxide him on 304 stainless steel resulted in rapid repassivation in the DME/0.5 M LiAsF6 solutions at potentials below breakdown. Post-test examinations did not clearly define the passivating mechanism in DME/0.5 M LiAsF6 solutions but, in DME/saturated LiAsF6, evidence indicated repassivation around 1800-2000 mV (sce) by salt him formation. Small water additions to DME/0.5 LiAsF6 solutions caused slight surface activation of the stainless steel, but no premature breakdown of the passive film. Small acid additions or removal of water below 50-100 ppm triggered surface pitting of the 304 stainless steel above the breakdown potential in DME/0.5 M LiAsF6 solutions. A critical amount of water appears to be required to passivate the stainless steel surface and neutralize acids produced during electrolyte oxidation. C1 USN ACAD,DEPT ENGN MECH,ANNAPOLIS,MD 21402. RP SHIFLER, DA (reprint author), JOHNS HOPKINS UNIV,DEPT MAT SCI & ENGN,BALTIMORE,MD 21218, USA. NR 18 TC 9 Z9 9 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0013-4686 J9 ELECTROCHIM ACTA JI Electrochim. Acta PD NOV PY 1994 VL 39 IS 16 BP 2407 EP 2413 DI 10.1016/0013-4686(94)00197-9 PG 7 WC Electrochemistry SC Electrochemistry GA PY468 UT WOS:A1994PY46800011 ER PT J AU SETHIAN, JD LEHMBERG, RH PAWLEY, CJ DENIZ, AV BODNER, SE MCLEAN, EA PRONKO, MS HARDGROVE, J MCGEOCH, MW GERBER, KA OBENSCHAIN, SP STAMPER, JA LEHECKA, TH AF SETHIAN, JD LEHMBERG, RH PAWLEY, CJ DENIZ, AV BODNER, SE MCLEAN, EA PRONKO, MS HARDGROVE, J MCGEOCH, MW GERBER, KA OBENSCHAIN, SP STAMPER, JA LEHECKA, TH TI OVERVIEW OF THE NIKE KRF LASER PROGRAM SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Nike is a large angularly multiplexed Krypton-Fluoride (KrF) laser under development at the Naval Research Laboratory. It is designed to explore the technical and physics issues of direct drive laser fusion.(1) When completed, Nike will deliver 2-3 kJ of 248 nm light in a 4 nsec pulse with intensities exceeding 2 x 10 W-14/cm(2) onto a planar target. Spatially and temporally incoherent light will be used to reduce the ablation pressure nonuniformities to less than 2% in the target focal plane. The Nike laser consists of a commercial oscillator/amplifier front end, an array of gas discharge amplifiers, two electron beam pumped amplifiers (one with a 20 x 20 cm(2) aperture, the other with a 60 x 60 cm(2) aperture) and the optics required to relay, encode, and decode the beam. Approximately 90% of the system is operational and currently undergoing tests: the system is complete through the 20 cm amplifier, the 60 cm amplifier has completed all the necessary electron beam/pulsed power tests, and is currently being developed into a laser amplifier, and most of the optics have been installed. It is anticipated that Nike will be fully operational in the fall of 1994. C1 SCI APPLICAT INT CORP,MCLEAN,VA 22102. PLEX CORP,BROOKLINE,MA 02146. RP SETHIAN, JD (reprint author), USN,RES LAB,CODE 6730,WASHINGTON,DC 20375, USA. NR 5 TC 6 Z9 6 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 717 EP 721 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600069 ER PT J AU NG, KW AF NG, KW TI NOISE-POLLUTION - SENSING AND MONITORING .8. MEASURING AND REDUCING CONTROL VALVE NOISE-POLLUTION SO I&CS-INSTRUMENTATION & CONTROL SYSTEMS LA English DT Article RP NG, KW (reprint author), OFF NAVAL RES,ARLINGTON,VA 22217, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU CHILTON CO PI RADNOR PA CHILTON WAY, RADNOR, PA 19089 SN 0746-2395 J9 I&CS-INSTR CON SYST JI I&CS-Instrum. Control Syst. PD NOV PY 1994 VL 67 IS 11 BP 59 EP & PG 0 WC Engineering, Multidisciplinary; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA PT943 UT WOS:A1994PT94300007 ER PT J AU STANTON, TK WIEBE, PH CHU, DZ GOODMAN, L AF STANTON, TK WIEBE, PH CHU, DZ GOODMAN, L TI ACOUSTIC CHARACTERIZATION AND DISCRIMINATION OF MARINE ZOOPLANKTON AND TURBULENCE SO ICES JOURNAL OF MARINE SCIENCE LA English DT Article DE ACOUSTICS; SCATTERING; ZOOPLANKTON; TURBULENCE ID SCATTERING; CYLINDERS AB The use of high-frequency acoustic scattering techniques has become central to the study of biological and physical oceanography, yet quantitative discrimination between sound scattered by zooplankton and turbulence has long eluded researchers. (Turbulence in the presence of a temperature gradient gives rise to variations in sound speed which in turn scatter sound.) Our calculations indicate that the target strength of a 2-cm-long single shrimp can be comparable to the scattering level from 1 m(3) of turbulence in the ocean. Because of the potential ambiguities in acoustic remote sensing of the two type of scatterers, laboratory measurements were made of the acoustic scattering properties of a small patch of turbulence and a 2-cm-long decapod shrimp over a frequency range of 300-800 kHz. The data were also used to emulate echoes that one might expect in the ocean environment. The spectrum of a single echo of the laboratory turbulence and its time evolution was quite irregular and different than the more stable spectra of the echoes from the individual animals near broadside incidence which contained consistent major peaks and nulls. There were also noticeable differences between incoherent averages of the echoes as the averaged spectrum of the turbulence echo was observed to remain irregular (although with reduced variability), while that of the animals retained some regularity. These results indicate the potential for discriminating between turbulent fields and single animals. C1 WOODS HOLE OCEANOG INST,DEPT BIOL,WOODS HOLE,MA 02543. USN,CTR UNDERSEA WARFARE,NEWPORT,RI 02841. RP STANTON, TK (reprint author), WOODS HOLE OCEANOG INST,DEPT APPL OCEAN PHYS & ENGN,WOODS HOLE,MA 02543, USA. NR 14 TC 33 Z9 33 U1 0 U2 2 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 1054-3139 J9 ICES J MAR SCI JI ICES J. Mar. Sci. PD NOV PY 1994 VL 51 IS 4 BP 469 EP 479 DI 10.1006/jmsc.1994.1048 PG 11 WC Fisheries; Marine & Freshwater Biology; Oceanography SC Fisheries; Marine & Freshwater Biology; Oceanography GA PR906 UT WOS:A1994PR90600013 ER PT J AU PINTO, JF ESTEROWITZ, L ROSENBLATT, GH KOKTA, M PERESSINI, D AF PINTO, JF ESTEROWITZ, L ROSENBLATT, GH KOKTA, M PERESSINI, D TI IMPROVED TI-SAPPHIRE LASER PERFORMANCE WITH NEW HIGH FIGURE OF MERIT CRYSTALS SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article ID TITANIUM-DOPED SAPPHIRE; PUMPED TI-AL2O3 LASER; SPECTROSCOPY; OSCILLATORS; GROWTH; CW AB The continuous-wave (CW) laser performance of Ti : Al2O3 crystals with high figure of merit is described. Using a 0.1% Ti : Al2O3 crystal (FOM = 1000), output powers of 3.5 W at 800 nm are obtained, pumping with a 9.6 W argon ion laser operating multiline. Continuous tunability of the CW Ti : Al2O3 laser extending from 665 to 1070 nm is also demonstrated for a 5 W pump power. C1 SFA INC,LANDOVER,MD 20785. UNION CARBIDE CORP,WASHOUGAL,WA 98671. RP PINTO, JF (reprint author), USN,RES LAB,CODE 5641,WASHINGTON,DC 20375, USA. NR 23 TC 22 Z9 22 U1 2 U2 8 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD NOV PY 1994 VL 30 IS 11 BP 2612 EP 2616 DI 10.1109/3.333715 PG 5 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA PT162 UT WOS:A1994PT16200023 ER PT J AU SLETTEN, MA TRIZNA, DB AF SLETTEN, MA TRIZNA, DB TI AN ULTRAWIDEBAND, POLARIMETRIC RADAR FOR THE STUDY OF SEA SCATTER SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Article ID GRAZING ANGLES AB An ultrawideband radar system is described which has the capability of making pulse-to-pulse polarimetric measurements of the dynamic water features responsible for radar backscatter from the sea. The fast risetime voltage step produced by a Tektronix time-domain reflectometer (TDR) is used to excite a 6-12-GHz amplifier, producing a short (15 cm) radar pulse. A pair of 2- to 18-GHz antennas and appropriate pulse-to-pulse transmit and receive switching capability allows the collection of four consecutive equivalent-time-sampled pulses, one for each combination of the linear transmit and receive antenna polarizations, A polarimetric scattering matrix is then obtained at a sequence of frequencies across the 6-12-GHz band through the Fourier Transform of each of the four waveforms and the application of an ultrawideband, polarimetric calibration procedure. The effect of motion on the computed scattering matrix is discussed and quantified, as this is an important consideration for polarimetric investigations of the water features responsible for radar sea scatter. A technique is then presented which compensates for the effects of target translation during the sampling interval. Scattering measurements of several rigid targets and of small breaking waves in a wave tank are used to illustrate the unique capabilities of this system and its applicability to sea scatter studies. RP SLETTEN, MA (reprint author), USN,RES LAB,DIV RADAR,SCATTERING & PROPGAT STAFF,WASHINGTON,DC 20375, USA. NR 12 TC 14 Z9 14 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 NOV PY 1994 VL 42 IS 11 BP 1461 EP 1466 DI 10.1109/8.362793 PG 6 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA PY614 UT WOS:A1994PY61400001 ER PT J AU KEMNER, KM HARRIS, VG ELAM, WT LODDER, CJ AF KEMNER, KM HARRIS, VG ELAM, WT LODDER, CJ TI POLARIZATION-DEPENDENT EXAFS STUDIES OF CHEMICAL AND STRUCTURAL ANISOTROPY IN SPUTTER-DEPOSITED CO78CR22 FILMS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID CO-CR FILMS; MAGNETIC-PROPERTIES AB Extended x-ray absorption fine structure measurements of a Co78Cr22 film were performed normal and using incident radiation in order to investigate, respectively, the in-plane and out-of-plane local structure and chemistry. The Fourier transformed EXAFS data illustrates the presence of an anisotropy between the in-plane and out-of-plane structures around Co and Cr atoms. Analysis of the local environments around Co for the two sample orientations indicates the presence of clusters, while fitting of the Cr environment indicates preferential ordering parallel td the film plane. These results are consistent with earlier reports' of a high density of stacking faults perpendicular to the growth axis, supporting the interpretation that a platelet-like texturing exists the columnar microstructure. Cr segregation the film plane provides diffusion paths allowing for; transverse compositional inhomogeneities observed in TEM studies. C1 UNIV TWENTE,MESA RES INST,7500 AE ENSCHEDE,NETHERLANDS. RP KEMNER, KM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Harris, Vincent/A-8337-2009 NR 10 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 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1994 VL 30 IS 6 BP 4017 EP 4019 DI 10.1109/20.333975 PN 1 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA PU429 UT WOS:A1994PU42900072 ER PT J AU DORSEY, PC CHRISEY, DB HORWITZ, JS LUBITZ, P AUYEUNG, RCY AF DORSEY, PC CHRISEY, DB HORWITZ, JS LUBITZ, P AUYEUNG, RCY TI ORIENTED BARIUM HEXAFERRITE THICK-FILMS GROWN ON C-PLANE AND M-PLANE SAPPHIRE SUBSTRATES SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID FERRITE FILMS; MICROWAVE; DEPOSITION; BAFE12O19; DEVICES AB The magnetic and structural properties of thick pulsed laser deposited (PLD) barium hexaferrite (BaM) films grown on c-plane and m-plane sapphire substrates were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), Rutherford backscattering spectroscopy (RBS), vibrating sample magnetometry (VSM), and ferrimagnetic resonance (FMR). Previously, BaM thin films (similar to 0.5 mu m) grown on c-plane (0001) sapphire substrates exhibited magnetic properties closely approaching those of single crystal sphere. These films are potentially useful for thin film millimeter-wave devices such as circulators, isolators, and phase shifters, provided that thick films (e.g., 20 to 100 mu m) with suitable magnetic and dielectric properties can be grown. In general, it was found that an increase in film thickness leads to the growth of either textured polycrystalline BaM, which can be loosely adherent, or delamination of the films. However, well oriented thick BaM films were grown up to 15 and 20 mu m on the c-plane and m-plane sapphire substrates, respectively, before delamination occurred. The FMR linewidth, Delta H, was 200 Oe at 85 GHz for an annealed 15 mu m thick PLD BaM film on c-plane sapphire with 4 pi M = 4200 G, H-A = 16000 Oe and and XRD omega-scan of 0.51 degrees FWHM about the (008) BaM plane. The FMR linewidth of PLD BaM films grown on m-plane (1100) sapphire substrates were greater than 450 Oe with 4 pi M = 4000 G and H-A = 16000 Oe. The m-plane films were magnetically well oriented in the film plane with M(r)/M(s) along with the easy axis greater than 90% for all PLD m-plane BaM films. C1 USN,RES LAB,WASHINGTON,DC 20375. NR 18 TC 39 Z9 39 U1 2 U2 19 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1994 VL 30 IS 6 BP 4512 EP 4517 DI 10.1109/20.334133 PN 1 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA PU429 UT WOS:A1994PU42900231 ER PT J AU KROWNE, CM AF KROWNE, CM TI COMPARISON OF THE AUXILIARY VECTOR FUNCTION AND ADJOINT METHODS IN SOLVING ANISOTROPIC MEDIA ELECTROMAGNETIC PROBLEMS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID PROPAGATION AB Although weighted residual techniques are extremely general and may be applied to both very arbitrary linear media of higly complex anisotropic character as well as nonlinear media, there are some place where one could cite the desire to maintain a variational approach. It is for these cases that we here address the properties of the auxiliary method for treating differing degrees of anisotropy, including but not limited to gyroelectric, gyromagnetic, chiral, gyroelectromagnetic, gyroelectrochiral, gyromagnetochiral, and gyroelectromagnetochiral. What the adjoint method is capble of doing and its limitations will be discussed in view of the auxiliary method. Issues such as inner product boundary conditions, adjoint media, adjoint fields, non-self-adjointness, nonHermiticity, auxiliary vector f function, to name a few, will be considered. These matters have particular significance for problems being solved today using intensive numerical techniques such as finite difference and finite element methods being simulated on PC, MAC, workstations, and mainframe platforms. RP KROWNE, CM (reprint author), USN,RES LAB,DIV ELECTR SCI & TECHNOL,MICROWAVE TECHNOL BRANCH,CODE 68503,WASHINGTON,DC 20375, USA. NR 11 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 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1994 VL 30 IS 6 BP 4536 EP 4538 DI 10.1109/20.334140 PN 1 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA PU429 UT WOS:A1994PU42900238 ER PT J AU LUBITZ, P LAWRENCE, SH RACHFORD, FJ RAPPOLI, BJ AF LUBITZ, P LAWRENCE, SH RACHFORD, FJ RAPPOLI, BJ TI EFFECTS OF ANNEALING ON THE MICROWAVE PROPERTIES OF SPIN-SPRAY NI-ZN FERRITES SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC AB We have studied the properties of a series of spinel ferrite thin films prepared from aqueous solutions at temperatures slightly below 100 degrees C, for a range of compositions from pure Fe3O4 to about Ni.34Zn.18Fe2.48O4. As made, the films are semiconducting and have high dielectric losses, but have narrow ferromagnetic resonance linewidths and often display standing spinwave spectra. As a result of annealing in air at temperatures above 300 degrees C, these ferrites undergo a transformation to a State having much higher resistivity and a reduced magnetic moment compared to as-grown films. This annealing decreases the microwave dielectric losses. but increases the ferromagnetic resonance linewidth. The changes in these properties with annealing are consistent with a partial transformation from spinel to maghemite, gamma-Fe2O3. RP LUBITZ, P (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 6 TC 7 Z9 9 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1994 VL 30 IS 6 BP 4539 EP 4541 DI 10.1109/20.334141 PN 1 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA PU429 UT WOS:A1994PU42900239 ER PT J AU WILLIAMS, CM ABE, M ITOH, T LUBITZ, P AF WILLIAMS, CM ABE, M ITOH, T LUBITZ, P TI THE MAGNETIC AND STRUCTURAL-PROPERTIES OF FERRITE PLATED NIZN-FERRITE FILMS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC AB Magnetization, magnetic anisotropy and ferrimagnetic resonance linewidth measurements have been made on a series of NiZn-ferrite films synthesized using a low temperature (T < 100 degrees C) ferrite plating technique developed by one of the authors. Films made by this technique are of considerable interest because of their potential use in the fabrication of non-reciprocal components for high frequency device applications. Our results show the films are textured and have a large magnetic anisotropy perpendicular to the plane of the film and a much smaller in-plane anisotropy. The magnetization, magnetic anisotropy and resonance linewidth scaled with ferrous ion concentration. The magnetic anisotropy is explained in terms of a single ion anisotropy directed along a [111] texture. C1 TOKYO INST TECHNOL,MEGURO KU,TOKYO 152,JAPAN. USN,RES LAB,WASHINGTON,DC 20375. RP WILLIAMS, CM (reprint author), MORGAN STATE UNIV,BALTIMORE,MD 21239, USA. NR 8 TC 10 Z9 11 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 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1994 VL 30 IS 6 BP 4896 EP 4899 DI 10.1109/20.334258 PN 1 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA PU429 UT WOS:A1994PU42900357 ER PT J AU RAUSCHER, C WILLIAMS, KJ AF RAUSCHER, C WILLIAMS, KJ TI HETERODYNE RECEPTION OF MILLIMETER-WAVE-MODULATED OPTICAL SIGNALS WITH AN IN P-BASED TRANSISTOR SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES LA English DT Article ID GENERATION AB High-frequency transistors are known for their ability to efficiently perform signal processing functions that reach beyond mere amplification. Among such functions are oscillation, signal mixing, frequency multiplication, and optical signal detection. The current investigation focuses specifically on these four functions as they pertain to retrieving signal information impressed on optical carriers of 1.3-mu m wavelength. The main demonstration object is a 40-GHz hybrid-integrated heterodyne receiver circuit that employs an InP-based HEMT in a four-function role to simultaneously provide carrier demodulation, self-generation of a local oscillation signal, internal frequency doubling thereof, and signal downconversion to a lower intermediate frequency band. RP RAUSCHER, C (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 15 TC 12 Z9 12 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 NOV PY 1994 VL 42 IS 11 BP 2027 EP 2034 DI 10.1109/22.330114 PG 8 WC Engineering, Electrical & Electronic SC Engineering GA PP982 UT WOS:A1994PP98200003 ER PT J AU ABRAHAMS, J AF ABRAHAMS, J TI CODES WITH MONOTONIC CODEWORD LENGTHS SO INFORMATION PROCESSING & MANAGEMENT LA English DT Article ID ALPHABETICAL CODES AB Minimum average codeword length coding under the constraint that the code-words are monotonically nondecreasing in length is studied. Bounds on the average length of an optimal ''monotonic'' code are derived, and sufficient conditions are given such that algorithms for optimal alphabetic codes can be used to find the optimal ''monotonic'' code. RP ABRAHAMS, J (reprint author), OFF NAVAL RES,DIV MATH COMP & INFORMAT SCI,ARLINGTON,VA 22217, USA. NR 6 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 0306-4573 J9 INFORM PROCESS MANAG JI Inf. Process. Manage. PD NOV-DEC PY 1994 VL 30 IS 6 BP 759 EP 764 DI 10.1016/0306-4573(94)90004-3 PG 6 WC Computer Science, Information Systems; Information Science & Library Science SC Computer Science; Information Science & Library Science GA PR268 UT WOS:A1994PR26800004 ER PT J AU OSMAN, A ELRIDI, R GUIRGUIS, N DEAN, DA AF OSMAN, A ELRIDI, R GUIRGUIS, N DEAN, DA TI IDENTIFICATION OF SCHISTOSOMA-MANSONI ANTIGENS RECOGNIZED BY SPLEEN-CELLS OF C57B1/6 MICE IMMUNIZED WITH ULTRAVIOLET-IRRADIATED CERCARIAE SO INTERNATIONAL JOURNAL FOR PARASITOLOGY LA English DT Article DE SCHISTOSOMA MANSONI; INBRED C57B1/6 MICE; ULTRAVIOLET IRRADIATED CERCARIAE; T CELL PROLIFERATION; IL-2; IL-4; T CELL WESTERN; WESTERN BLOTTING ID PROTECTIVE IMMUNITY; SURFACE-ANTIGENS; RESISTANCE; ANTIBODY; RESPONSES; GLYCOPROTEINS; LYMPHOCYTES; INFECTION; SERA AB Spleen cells of C57B1/6 mice immunized twice with Schistosoma mansoni cercariae attenuated by ultraviolet irradiation proliferated and produced interleukin-(Il)-2 and/or Il-4 in response to both soluble schistosomular and adult worm antigens of 72-68, 60-62, 50, 45, 29.5 and 28 kDa. All of these bands, except the 45 kDa, were also recognized by serum antibodies in Western blotting. C1 VACSERA,BIOMED RES CTR INFECT DIS,BIOMED RES DEPT,CAIRO,EGYPT. CAIRO UNIV,FAC SCI,DEPT ZOOL,CAIRO,EGYPT. USN,MED RES UNIT 3,CAIRO,EGYPT. NR 37 TC 6 Z9 6 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-7519 J9 INT J PARASITOL JI Int. J. Parasit. PD NOV PY 1994 VL 24 IS 7 BP 943 EP 950 DI 10.1016/0020-7519(94)90158-9 PG 8 WC Parasitology SC Parasitology GA PU091 UT WOS:A1994PU09100005 PM 7883445 ER PT J AU KARLE, IL FLIPPENANDERSON, JL UMA, K BALARAM, P AF KARLE, IL FLIPPENANDERSON, JL UMA, K BALARAM, P TI HYDRATION AND DISTORTION OF PEPTIDE HELICES IN CRYSTALS - ALPHA-HELICAL STRUCTURE OF A DODECAPEPTIDE, BOC-(ALA-LEU-AIB)(4)-OME SO INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH LA English DT Article DE DODECAPEPTIDE; CRYSTAL STRUCTURE; LONG HYDROGEN BONDS IN ALPHA-HELIX; SOLVATION OF ALPHA-HELIX; PARALLEL PACKING OF ALPHA-HELICES; 2 INDEPENDENT MOLECULES; ALPHA-AMINOISOBUTYRYL PEPTIDE ID MOLECULAR-DYNAMICS; WATER; PROTEINS; ALANINE; APOLAR AB The dodecapeptide Boc-(Ala-Leu-Aib)(4)-OMe crystallized with two independent helical molecules in a triclinic cell. The two molecules are very similar in conformation, with a 3(10)-helix turn at the N-terminus followed by an alpha-helix, except for an elongated N(7)...O(3) distance in both molecules. All the helices in the crystal pack in a parallel motif. Eleven water sites have been found in the head-to-tail region between the apolar helices that participate in peptide-water hydrogen bonds and a network of water-water hydrogen bonds. The crystal parameters are as follows: 2(C58H104N12O15)+ca. 10H(2)O, space group P1 with a = 12.946(2), b = 17.321(3), c = 20.465(4) Angstrom, alpha = 103.12(2), beta = 105.63(2), gamma = 107.50(2)degrees, Z = 2, R = 10.9% for 5152 data observed > 3 sigma(F), resolution 1.0 Angstrom. In contrast to the shorter sequences [Karle et al. (1988)Proc. Natl. Acad. Sci. USA 85, 299-303] and Boc-(Ala-Leu-Aib)(2)-OMe [Karle et al. (1989) Biopolymers 28, 773-781], no insertion of a water molecule into the helix is observed. However, the elongated N---O distance between Ala(7) NH and Aib(3) CO in both molecules (molecule A, 3.40 Angstrom; molecule B, 3.42 Angstrom) is indicative of an incipient break in the helices. (C) Munksgaard 1994. C1 INDIAN INST SCI,MOLEC BIOPHYS UNIT,BANGALORE 560012,KARNATAKA,INDIA. RP KARLE, IL (reprint author), USN,RES LAB,STRUCT MATTER LAB,CODE 6030,WASHINGTON,DC 20375, USA. FU NIGMS NIH HHS [GM30902] NR 19 TC 5 Z9 5 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0367-8377 J9 INT J PEPT PROT RES JI Int. J. Pept. Protein Res. PD NOV PY 1994 VL 44 IS 5 BP 491 EP 498 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA PW684 UT WOS:A1994PW68400014 PM 7896509 ER PT J AU BROOK, I AF BROOK, I TI COMPARISON OF CEFOXITIN, CEFOTETAN AND THE COMBINATION OF AMPICILLIN WITH SULBACTAM IN THE THERAPY OF POLYMICROBIAL INFECTION IN MICE SO JOURNAL OF ANTIMICROBIAL CHEMOTHERAPY LA English DT Note ID ESCHERICHIA-COLI; INVITRO SUSCEPTIBILITY; BACTEROIDES; EFFICACIES; ABSCESSES; BACTERIA AB The comparative efficacies of cefoxitin, cefotetan and the combination of ampicillin with sulbactam were investigated in mixed aerobic and anaerobic infections of mice. Treatment was administered by intramuscular injection for 10 days and was started 1 h before infection. After intraperitoneal infection with Escherichia coli, Bacteroides fragilis, and one other member of the B. fragilis group (either Bacteroides thetaio-taomicron, Bacteroids ovatus or Bacteroides distasonis), 41 of 90 (46%) control mice died and art survivors developed polymicrobial abscesses. Cephalosporin therapy reduced mortaligy 13% with cefoxitin, 3% with cefotetan, and 23% with ampicillin plus sulbactam; 14%, 10% and 14% of surviving animals, respectively developed abscesses. Each of the treatment regimens significantly reduced the number of all organisms in abscesses, independent of their activity in vitro. However, the reduction in the number of E. coli by ampicillin plus sulbactam was less marked (P < 0.001) than that achieved by cefoxitin (P < 0.05) or cefotetan. These data show that in vivo efficiencies of cefoxitin and cefotetan, are independent of their in vitro potencies in the early management of polymicrobial infections in mice. RP BROOK, I (reprint author), USN, MED RES INST, POB 70412, CHEVY CHASE, MD 20813 USA. NR 10 TC 1 Z9 1 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0305-7453 EI 1460-2091 J9 J ANTIMICROB CHEMOTH JI J. Antimicrob. Chemother. PD NOV PY 1994 VL 34 IS 5 BP 791 EP 796 DI 10.1093/jac/34.5.791 PG 6 WC Infectious Diseases; Microbiology; Pharmacology & Pharmacy SC Infectious Diseases; Microbiology; Pharmacology & Pharmacy GA PY407 UT WOS:A1994PY40700020 PM 7706175 ER PT J AU BUOT, FA RAJAGOPAL, AK AF BUOT, FA RAJAGOPAL, AK TI BINARY INFORMATION-STORAGE AT ZERO-BIAS IN QUANTUM-WELL DIODES SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID RESONANT-TUNNELING STRUCTURES; INTRINSIC BISTABILITY; OSCILLATIONS; DEVICES; CURVES AB It is argued, based on the intrinsic time-dependent behavior of double-barrier structures, that a modification of a conventional quantum-well diode with special spacer-layer structure in the source and/or the drain region will lead to two stable current-voltage and charge state behaviors all the way down to zero bias. This viewpoint explains the salient features of a recent experimental observation on quantum-well diodes with n(-)-n(+)-n(-) spacer layers. We substantiate this with a simple theory of self-consistent charge buildup and bistability, and show that a limited supply or higly altered distribution of electrons from the emitter at high bias leads to fractional recharging of the quantum well and fractional current values, during the decreasing voltage sweep portion of a ''closed-loop'' voltage sweep. This is in contrast with previous theories based on numerical simulations which allow for more than two current states, by virtue of the use of time-independent analysis and/or the use of ''open-multibranch'' voltage sweep which do not correspond to the ''closed-loop'' voltage sweep in the actual experiments mentioned above. This two charge state phenomenon then is the basis for a feasible binary-information storage device at zero bias without dissipation. RP BUOT, FA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 12 TC 11 Z9 14 U1 0 U2 2 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 NOV 1 PY 1994 VL 76 IS 9 BP 5552 EP 5560 DI 10.1063/1.357158 PG 9 WC Physics, Applied SC Physics GA PQ026 UT WOS:A1994PQ02600083 ER PT J AU GRINSTEIN, FF AF GRINSTEIN, FF TI OPEN BOUNDARY-CONDITIONS IN THE SIMULATION OF SUBSONIC TURBULENT SHEAR FLOWS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID NUMERICAL-SIMULATION; HYPERBOLIC SYSTEMS; MIXING LAYERS; DYNAMICS AB Dealing with open boundaries in the computer simulation of unsteady subsonic shear flows presents challenging problems. In practice, only a portion of the flow can be investigated and we must ensure that the presence of artificial boundaries does not pollute the solution in a significant way. One difficulty is related to the basic solution of the physical flow equations and involves choosing appropriate nonlocal open boundary conditions at the outflow boundaries which will adequately bound the computational domain while providing information about the virtual flow behavior outside. A second difficulty is related to the discretized computational problem, for which additional numerical boundary conditions that are consistent with the unsteady flow equations at the boundaries are required for closure. Recent approaches based on characteristic analysis and their practical implementation are discussed. Specific examples are used to illustrate the implementation of state-of-the-art approaches to open boundary conditions and, in particular, the potential sensitivity of subsonic free shear flows to the actual choice of open boundary conditions. This sensitvity is an intrinsic feature of the flows being studied rather than an artifact of the computations. Ideal free shear flows do not exist; actual flow realizations are defined by the numerical or laboratory boundary conditions in the experiments. (C) 1994 Academic Press, Inc. RP GRINSTEIN, FF (reprint author), USN,RES LAB,COMPUTAT PHYS & FLUID DYNAM LAB,CODE 6410,WASHINGTON,DC 20375, USA. NR 25 TC 32 Z9 33 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD NOV PY 1994 VL 115 IS 1 BP 43 EP 55 DI 10.1006/jcph.1994.1177 PG 13 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA PN672 UT WOS:A1994PN67200005 ER PT J AU ANCONA, MG AF ANCONA, MG TI FULLY-LAGRANGIAN AND LATTICE-BOLTZMANN METHODS FOR SOLVING SYSTEMS OF CONSERVATION EQUATIONS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID NAVIER-STOKES EQUATIONS; GAS AUTOMATA; MAGNETOHYDRODYNAMICS; SIMULATION; DYNAMICS; MODEL AB A class of ''fully-Lagrangian'' methods for solving systems of conservation equations is defined. The key step in formulating these methods is the definition of a new set of field variables for which Lagrangian discretization is trivial. Recently popular lattice-Boltzmann simulation schemes for solving such systems are shown to be a useful sub-class of these fully-Lagrangian methods in which (a) the conservation laws are satisfied at each grid point, (b) the Lagrangian variables are expanded pertubatively, and (c) discretization error is used to represent physics. Such schemes are typically derived using methods of kinetic theory. Our numerical analysis approach shows that the conventional physical derivation, while certainly valid and fruitful, is not essential, that it often confuses physics and numerics and that it can be unnecessarily constraining. For example, we show that lattice-Boltzmann-like methods can be non-perturbative and can be made higher-order, implicit and/or with non-uniform grids. Furthermore, our approach provides new perspective on the relationship between lattice-Boltzmann methods and finite-difference techniques. Among other things, we show that the lattice-Boltzmann schemes are only conditionally consistent and in some cases are identical to the well-known Dufort-Frankel method. Through this connection, the lattice-Boltzmann method provides a rational basis for understanding Dufort-Frankel and gives a pathway for its generalization. At the same time, that Dufort-Frankel is no longer much used suggests that the lattice-Boltzmann approach might also share this fate. (C) 1994 Academic Press, Inc. C1 USN,RES LAB,WASHINGTON,DC 20375. RP ANCONA, MG (reprint author), LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545, USA. NR 28 TC 29 Z9 30 U1 1 U2 5 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD NOV PY 1994 VL 115 IS 1 BP 107 EP 120 DI 10.1006/jcph.1994.1181 PG 14 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA PN672 UT WOS:A1994PN67200009 ER PT J AU RAUSCHENBERGER, CR MCCLANAHAN, SB PEDERSON, ED TURNER, DW KAMINSKI, EJ AF RAUSCHENBERGER, CR MCCLANAHAN, SB PEDERSON, ED TURNER, DW KAMINSKI, EJ TI COMPARISON OF HUMAN POLYMORPHONUCLEAR NEUTROPHIL ELASTASE, POLYMORPHONUCLEAR NEUTROPHIL CATHEPSIN-G, AND ALPHA(2)-MACROGLOBULIN LEVELS IN HEALTHY AND INFLAMED DENTAL PULPS SO JOURNAL OF ENDODONTICS LA English DT Article ID TISSUE-INJURY; IMMUNE-COMPLEXES; LEUKOCYTE; ALPHA-2-MACROGLOBULIN; ALBUMIN; FLUID; SERUM AB Polymorphonuclear neutrophils (PMNs) are found in dental pulp secondary to carious exposures, peridontal disease, or trauma. Lysosomal degranulation of these cells liberates cellular proteases, including elastase (PMN-E) and cathepsin-G (PMN-CG), which produce connective tissue degradation. However, nonspecific pulpal tissue destruction can be modified by a naturally occurring serum protease inhibitor alpha2-macroglobulin (A2-M). This study relates the concentrations of human PMN-E, PMN-CG, and A2-M in healthy and inflamed pulpal samples. Evaluation of 21 specimens yielded statistically significant differences between healthy and moderate to severely inflamed pulps for all groups (p < 0.05). No significant correlation was detected among human PMN-E, PMN-CG, and A2-M in the healthy tissues (p > 0.05). However, in the moderate to severely inflamed pulps, there was a significant correlation between PMN-CG and A2-M (p < 0.05). C1 USN,CTR DENT,GREAT LAKES,IL 60088. USN,DENT RES INST,DEPT SCI INVEST,GREAT LAKES,IL 60088. NORTHWESTERN UNIV,DIV PERIODONT,CHICAGO,IL 60611. NORTHWESTERN UNIV,DEPT PATHOL,CHICAGO,IL 60611. RP RAUSCHENBERGER, CR (reprint author), UNIV MARYLAND,BALTIMORE COLL DENT SURG,SCH DENT,DEPT ENDODONT,666 W BALTIMORE ST,BALTIMORE,MD 21201, USA. NR 20 TC 11 Z9 11 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0099-2399 J9 J ENDODONT JI J. Endod. PD NOV PY 1994 VL 20 IS 11 BP 546 EP 550 DI 10.1016/S0099-2399(06)80070-1 PG 5 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA PP027 UT WOS:A1994PP02700006 PM 7543925 ER PT J AU MERA, AE GRIFFITH, JR AF MERA, AE GRIFFITH, JR TI MELT CONDENSATION AND SOLUTION POLYMERIZATION OF HIGHLY FLUORINATED ALIPHATIC POLYESTERS SO JOURNAL OF FLUORINE CHEMISTRY LA English DT Article DE ALIPHATIC POLYESTERS; MELT CONDENSATION POLYMERIZATION; SOLUTION POLYMERIZATION; NMR SPECTROSCOPY; IR SPECTROSCOPY AB Highly fluorinated aliphatic polyesters were synthesized from a fluorodiol [HOCH2CH2(CF2)(8)CH2CH2OH] and both sebacoyl chloride and adipoyl chloride. Melt condensation polymerization followed by fractionation resulted in polymer samples with number average molecular weights in excess of 10 000. The use of solution polymerization yielded inferior results - with sebacoyl chloride the resultant polymers were of lower molecular weight, and with adipoyl chloride no polymer was formed. The fluoropolyesters have been characterized by H-1 NMR and FT-IR spectroscopies, solubility, water contact angle, DSC and TGA. Crosslinking via peroxide of the polyester derived from sebacoyl chloride was successful; however, the resultant elastomeric-type material possessed residual crystallinity (from the parent polymer) and a low melting point. RP MERA, AE (reprint author), USN,RES LAB,MAT CHEM BRANCH,CODE 6120,WASHINGTON,DC 20375, USA. NR 12 TC 4 Z9 4 U1 2 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0022-1139 J9 J FLUORINE CHEM JI J. Fluor. Chem. PD NOV PY 1994 VL 69 IS 2 BP 151 EP 155 DI 10.1016/0022-1139(94)03075-8 PG 5 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA PP547 UT WOS:A1994PP54700006 ER PT J AU CRISTI, R BURL, J RUSSO, N AF CRISTI, R BURL, J RUSSO, N TI ADAPTIVE QUATERNION FEEDBACK-REGULATION FOR EIGENAXIS ROTATIONS SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Article ID SPACECRAFT; MANEUVERS AB A controller to rotate a rigid body between two successive orientations is designed. Particular features are the bet that it is based on the quaternion approach, known to provide singularity-free attitude description, and it is adaptive in the sense that it does not need specific knowledge of the inertia matrix. Global stability of the overall controller is proved analytically and tested in computer simulations. C1 MICHIGAN TECHNOL UNIV,DEPT ELECT ENGN,HOUGHTON,MI 49931. US COAST GUARD,WILDWOOD,NJ 08260. RP CRISTI, R (reprint author), USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943, USA. NR 23 TC 18 Z9 22 U1 0 U2 3 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 NOV-DEC PY 1994 VL 17 IS 6 BP 1287 EP 1291 DI 10.2514/3.21346 PG 5 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA QE663 UT WOS:A1994QE66300021 ER PT J AU ANDERSON, MR SCHAB, DE AF ANDERSON, MR SCHAB, DE TI DRAG FUNCTION MODELING FOR AIR-TRAFFIC SIMULATION SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Note C1 USN,CTR AIR WARFARE,DIV TRAINING SYST,FIGHTER ATTACK BRANCH,ORLANDO,FL 32826. RP ANDERSON, MR (reprint author), VIRGINIA POLYTECH INST & STATE UNIV,DEPT AEROSP & OCEAN ENGN,BLACKSBURG,VA 24061, USA. NR 7 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 0731-5090 J9 J GUID CONTROL DYNAM JI J. Guid. Control Dyn. PD NOV-DEC PY 1994 VL 17 IS 6 BP 1383 EP 1385 DI 10.2514/3.21365 PG 3 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA QE663 UT WOS:A1994QE66300040 ER PT J AU CRIST, DR LI, CH HAMMER, CF NELSON, KA ADOLPH, HG AF CRIST, DR LI, CH HAMMER, CF NELSON, KA ADOLPH, HG TI STRUCTURAL ASPECTS OF THE PRODUCT FROM GLYOXAL AND TETRAKIS(ETHOXYCARBONYLAMINO)ETHANE SO JOURNAL OF HETEROCYCLIC CHEMISTRY LA English DT Article AB The base-promoted addition of glyoxal to 1,1,2,2-tetrakis(ethoxycarbonylamino)ethane in DMF gives a product mixture containing mostly 1,1',3,3'-tetrakis(ethoxycarbonyl)-4,4',5,5,'-tetrahydroxy-2,2'-?biimidazolidyl. An alternate structure containing a tetraazadecalin system was considered less likely, since the most significant peak in the mass spectrum of this product and a tetraacetate derivative corresponded to half the mass of the parent ion. Two-dimensional nmr spectra on the major hplc fraction are more consistent with the biimidazolidinyl structure (very low J(vic) and lack of NOE enhancement). A HETCOSY spectrum on the mixture allowed assignment of H-1 nmr shifts. C1 USN,CTR SURFACE WARFARE,DAHLGREN DIV,SILVER SPRING,MD 20903. RP CRIST, DR (reprint author), GEORGETOWN UNIV,DEPT CHEM,WASHINGTON,DC 20057, USA. NR 16 TC 0 Z9 0 U1 0 U2 0 PU HETERO CORPORATION PI TAMPA PA BOX 20285, TAMPA, FL 33622-0285 SN 0022-152X J9 J HETEROCYCLIC CHEM JI J. Heterocycl. Chem. PD NOV-DEC PY 1994 VL 31 IS 6 BP 1525 EP 1528 PG 4 WC Chemistry, Organic SC Chemistry GA QA316 UT WOS:A1994QA31600041 ER PT J AU BROWN, GD AF BROWN, GD TI CHROMATIC DISPERSION MEASUREMENT IN GRADED-INDEX MULTIMODE OPTICAL FIBERS SO JOURNAL OF LIGHTWAVE TECHNOLOGY LA English DT Article AB The chromatic dispersion observed in a graded-index multimode optical fiber is a function of the radial position of the launched light. When a graded-index multimode optical fiber is overfilled spatially and angularly, the chromatic dispersion observed is an average (composite) chromatic dispersion over all of the possible launches. Under certain assumptions, the relationship between the chromatic dispersion observed for the overfilled fiber and the chromatic dispersion of any restrictive launch can be determined. This relationship can be used to predict the composite graded-index multimode optical fiber chromatic dispersion from the measurement of the chromatic dispersion of a single simplified launch, such as a single-mode fiber launch. Preliminary experimental results confirm this approach. RP BROWN, GD (reprint author), USN,CTR SURFACE WARFARE,FIBER OPT GRP,DAHLGREN,VA 22448, USA. NR 2 TC 3 Z9 3 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 0733-8724 J9 J LIGHTWAVE TECHNOL JI J. Lightwave Technol. PD NOV PY 1994 VL 12 IS 11 BP 1907 EP 1909 DI 10.1109/50.336052 PG 3 WC Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA PT865 UT WOS:A1994PT86500002 ER PT J AU HA, TT LOESCH, RM AF HA, TT LOESCH, RM TI CROSSTALK ANALYSIS OF ASYNCHRONOUS OPTICAL CHIP INTERCONNECTS WITH DIRECT-DETECTION SO JOURNAL OF LIGHTWAVE TECHNOLOGY LA English DT Article ID WAVE-GUIDES; RECEIVERS; SYSTEMS; ASK AB We provide a crosstalk analysis of optical interconnects via single-mode waveguides with asynchronous transmission. Our crosstalk model is general and can be used for any type of waveguide network. The analysis takes into account the coupling-induced crosstalks between adjacent waveguides, the laser linewidth, the shot noise and the dark current generated by the photodiode, and the postdetection thermal noise. A comparison to synchronous transmission is also provided. RP HA, TT (reprint author), USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943, USA. NR 21 TC 2 Z9 2 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 0733-8724 J9 J LIGHTWAVE TECHNOL JI J. Lightwave Technol. PD NOV PY 1994 VL 12 IS 11 BP 1932 EP 1938 DI 10.1109/50.336057 PG 7 WC Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA PT865 UT WOS:A1994PT86500007 ER PT J AU HEPP, MA MILLER, JB AF HEPP, MA MILLER, JB TI MAPPING MOLECULAR-ORIENTATION BY SOLID-STATE NMR IMAGING SO JOURNAL OF MAGNETIC RESONANCE SERIES A LA English DT Article ID NUCLEAR MAGNETIC-RESONANCE; FOURIER-TRANSFORM NMR; SELECTIVE EXCITATION; SLICE SELECTION; PULSE SEQUENCE; MAGIC-ECHO; IMAGES; GRADIENTS; POLYMERS AB A new solid-state NMR imaging experiment is presented which provides high-resolution chemical-shift selective images of abundant nuclei. This experiment employs the line-narrowing effects of the TREV-8 pulse sequence and a constant-time phase-encoding period to achieve spatial resolution. At the end of the phase-encoding period, however, the chemical-shift evolution is reversed and an echo is recorded during the subsequent acquisition period. A 3D data set is acquired which, after processing, results in one 2D image for each point in the chemical-shift spectrum. A single vector passing through all of the images provides a dipolar-decoupled NMR spectrum for any picture element in the image. This method has been applied to monitor the propagation of stress during crack growth in polytetrafluoroethylene. (C) 1994 Academic Press, Inc. RP HEPP, MA (reprint author), USN,RES LAB,CODE 6122,4555 OVERLOOK AVE SW,WASHINGTON,DC 20375, USA. NR 45 TC 23 Z9 23 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 1064-1858 J9 J MAGN RESON SER A JI J. Magn. Reson. Ser. A PD NOV PY 1994 VL 111 IS 1 BP 62 EP 69 DI 10.1006/jmra.1994.1226 PG 8 WC Physics, Atomic, Molecular & Chemical SC Physics GA PT402 UT WOS:A1994PT40200009 ER PT J AU WHITLOCK, RR FRICK, GM AF WHITLOCK, RR FRICK, GM TI PARTICLE-SIZE DISTRIBUTIONS OF AEROSOLS FORMED BY LASER-ABLATION OF SOLIDS AT 760-TORR SO JOURNAL OF MATERIALS RESEARCH LA English DT Article AB The size distributions of aerosol particles generated in N-2 and O-2 at ambient atmospheric pressure by repetitive excimer laser ablation of solids have been measured in quasi-steady-state from 10 nm to 1 mu m diameter with a differential mobility analyzer (DMA). A light scattering technique extended the range of measurable sizes up to 20 mu m, beyond the upper limit of sizes observed in the aerosol. Irradiation near focus was required to observe metal particles above 0.1 mu m diameter. YBCO ceramic (YBa2Cu3O7) produced copious smaller particles with mild focusing. For an ablated polymer, PMMA, particulate production increased and the size distribution altered shape with continued energy deposition. RP WHITLOCK, RR (reprint author), USN, RES LAB, WASHINGTON, DC 20375 USA. NR 20 TC 15 Z9 16 U1 0 U2 6 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD NOV PY 1994 VL 9 IS 11 BP 2868 EP 2872 DI 10.1557/JMR.1994.2868 PG 5 WC Materials Science, Multidisciplinary SC Materials Science GA PT199 UT WOS:A1994PT19900017 ER PT J AU GRISCOM, DL AF GRISCOM, DL TI FROM E' CENTERS TO THE CHARACTERISTIC RESONANCE - A COLLEAGUES REMINISCENCES ON THE SCIENTIFIC ODYSSEY OF WEEKS,ROBERT,A SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 1st PAC RIM Meeting on Glass and Optical Materials CY NOV 07-10, 1993 CL HONOLULU, HI SP AMER CERAM SOC ID FUNDAMENTAL DEFECT CENTERS; SI-29 HYPERFINE-STRUCTURE; FERROMAGNETIC-RESONANCE; OXYGEN VACANCY; ALPHA-QUARTZ; CRYSTALLINE SIO2; FUSED-SILICA; HIGH-PURITY; GLASS; MODEL AB The scientific career of Professor R.A. Weeks has been an odyssey of some 40 years, carrying him from the Scylla of silica (where he discovered the 'E' center') to the Charybdis of lunar science (where he confronted the riddle of the 'characteristic' resonance) and back once again to silica. This paper touches upon but a few episodes in his fantastic voyage, these selected from the perspective of a colleague and occasional shipmate. RP GRISCOM, DL (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 74 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD NOV PY 1994 VL 179 BP 22 EP 38 DI 10.1016/0022-3093(94)90682-3 PG 17 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA PW797 UT WOS:A1994PW79700004 ER PT J AU EDWARDS, AH PICKARD, JA STAHLBUSH, RE AF EDWARDS, AH PICKARD, JA STAHLBUSH, RE TI INTERACTION OF HYDROGEN WITH DEFECTS IN A-SIO2 SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 1st PAC RIM Meeting on Glass and Optical Materials CY NOV 07-10, 1993 CL HONOLULU, HI SP AMER CERAM SOC ID ELECTRON-SPIN-RESONANCE; AMORPHOUS-SILICON DIOXIDE; INDUCED INTERFACE STATES; 111 SI-SIO2 INTERFACE; SELF-TRAPPED HOLES; OXIDIZED SILICON; ROOM-TEMPERATURE; TIME-DEPENDENCE; OXYGEN VACANCY; THERMAL SIO2 AB In this paper, the current understanding of the role of hydrogen in passivating and creating defects in irradiated MOS samples is reviewed. The first ab initio calculation of the energies of activation and reaction of the dissociation of H-2 molecules at the E'(1) defect in alpha-quartz, and for a simple model for the E'gamma defect in a-SiO2 is prestented. The effects of various improvements to standard Hartree-Fock theory, including perturbative configuration interaction and improved basis sets, were studied. It is found that the qualitative picture of H-2 dissociation is insensitive to these improvements. The estimates of the energies of reaction and activation in the adiabatic approximation are 0.25 eV and 0.78 eV, respectively. The latter energy is roughly twice the activation energy reported by Li et al. The probable sources of error are explored and it is concluded that quantum effects (zero point energy and tunneling) are probably crucial for modeling this dissociation reaction. The first ab initio study of the preferred conformation of the proton in a-SiO2 and a preliminary semiempirical calculation of the activation energy for proton hopping are also presented. C1 USN,RES LAB,WASHINGTON,DC 20375. RP EDWARDS, AH (reprint author), UNIV N CAROLINA,DEPT ELECT ENGN,CHARLOTTE,NC 28223, USA. NR 48 TC 45 Z9 45 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD NOV PY 1994 VL 179 BP 148 EP 161 DI 10.1016/0022-3093(94)90692-0 PG 14 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA PW797 UT WOS:A1994PW79700014 ER PT J AU GRISCOM, D HOSONO, H AF GRISCOM, D HOSONO, H TI THE R.A. WEEKS INTERNATIONAL-SYMPOSIUM ON SCIENCE AND TECHNOLOGY OF SIO2 AND RELATED MATERIALS - PREFACE SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Editorial Material C1 NAGOYA INST TECHNOL,NAGOYA,AICHI 466,JAPAN. RP GRISCOM, D (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD NOV PY 1994 VL 179 BP R7 EP R9 PG 3 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA PW797 UT WOS:A1994PW79700001 ER PT J AU ERICK, M AF ERICK, M TI NO MORE MORNING SICKNESS - A SURVIVAL GUIDE FOR WOMEN - ERICK,M SO JOURNAL OF NURSE-MIDWIFERY LA English DT Book Review RP ERICK, M (reprint author), USN,MED CTR,SAN DIEGO,CA 92132, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0091-2182 J9 J NURSE-MIDWIFERY JI J. Nurse-Midwifery PD NOV-DEC PY 1994 VL 39 IS 6 BP 401 EP 401 PG 1 WC Nursing SC Nursing GA PV289 UT WOS:A1994PV28900025 ER PT J AU RYAN, MA WILLIAMS, RM ALLEVATO, CE VINING, CB LOWEMA, CK ROBIE, SB AF RYAN, MA WILLIAMS, RM ALLEVATO, CE VINING, CB LOWEMA, CK ROBIE, SB TI THERMOPHYSICAL PROPERTIES OF SODIUM BETA''-ALUMINA POLYCRYSTALLINE CERAMIC SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article DE CERAMICS; X-RAY DIFFRACTION; THERMAL CONDUCTIVITY; THERMAL EXPANSION ID DIFFUSIVITY; HEAT AB The thermal diffusivity, heat capacity and thermal conductivity of solid samples of new, Li-stabilized, sodium beta''-alumina polycrystalline ceramic have been determined in the temperature range 500-1200 K. Unit cell parameters and the coefficient of thermal expansion have been determined using X-ray diffraction in the range 300-1273 K for similar solid ceramic samples which had been exposed to liquid sodium at high temperature as well as for new samples. Some differences in unit cell parameters were found between sodium exposed and unexposed samples. C1 SCINTAG INC,SUNNYVALE,CA 94086. USN,CTR AIR WARFARE,DIV WEAP,RES DEPT,CHINA LAKE,CA 93555. RP RYAN, MA (reprint author), CALTECH,JET PROP LAB,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 10 TC 12 Z9 12 U1 2 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PD NOV PY 1994 VL 55 IS 11 BP 1255 EP 1260 DI 10.1016/0022-3697(94)90207-0 PG 6 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA QB349 UT WOS:A1994QB34900012 ER PT J AU DECREDICO, MA AF DECREDICO, MA TI BEFORE ANTIETAM - THE BATTLE FOR SOUTH MOUNTAIN - PRIEST,JM SO JOURNAL OF SOUTHERN HISTORY LA English DT Book Review RP DECREDICO, MA (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU SOUTHERN HISTORICAL ASSN PI ATHENS PA UNIV GEORGIA HISTORY DEPT, ATHENS, GA 30602 SN 0022-4642 J9 J SOUTHERN HIST JI J. South. Hist. PD NOV PY 1994 VL 60 IS 4 BP 816 EP 817 DI 10.2307/2211104 PG 2 WC History SC History GA PT365 UT WOS:A1994PT36500043 ER PT J AU CUSCHIERI, JM FEIT, D AF CUSCHIERI, JM FEIT, D TI A HYBRID SOLUTION FOR THE RESPONSE GREENS-FUNCTION OF A FLUID-LOADED CYLINDRICAL-SHELL SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB A classical problem in structural acoustics is the response of a fluid-loaded cylindrical shell, with ring discontinuities or ring forces, to excitation by incident acoustic waves. The solution for these types of problems is generally formulated using integral transforms. The solution in the spatial domain is obtained by inverse transforming the wave-number solution. In past work, the inverse transform has been obtained by using either a contour integral approach or by introducing structural damping, thus removing the singularities from the integrand of the inverse transform. An alternative to these classical approaches, which does not require the introduction of structural damping, and therefore retains only the influence of the fluid loading on the response of the cylindrical shell, is a hybrid method which has previously been used for a fluid-loaded plate with a line discontinuity. Using this approach, the solution is not contaminated by the artificially introduced structural damping. Furthermore, the hybrid approach is more efficient computationally, especially when the evaluation of the response Green's function is required. In this paper, the hybrid approach is applied to the solution of the displacement response Green's function for a fluid-loaded cylindrical shell with a ring discontinuity, excited by an obliquely incident acoustic wave. The shell wall thickness to radius ratio is 0.01 and therefore thin shell equations of motion are used in the solution. The results presented are for the first circumferential mode (n=0). However, the approach can be used to generate results for other values of the circumferential mode number. At high frequencies, the results asymptotically approach those for a fluid-loaded plate. Also, for an axial load the results are in close agreement with results obtained on a shell with structural damping by other investigators. C1 DAVID TAYLOR RES CTR,NSWC,CARDEROCK DIV,BETHESDA,MD 20084. RP CUSCHIERI, JM (reprint author), FLORIDA ATLANTIC UNIV,DEPT OCEAN ENGN,CTR ACOUST & VIBRAT,BOCA RATON,FL 33431, USA. NR 8 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 NOV PY 1994 VL 96 IS 5 BP 2776 EP 2784 DI 10.1121/1.411284 PN 1 PG 9 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA PQ018 UT WOS:A1994PQ01800016 ER PT J AU PHOTIADIS, DM BUCARO, JA HOUSTON, BH AF PHOTIADIS, DM BUCARO, JA HOUSTON, BH TI SCATTERING FROM FLEXURAL WAVES ON A RIBBED CYLINDRICAL-SHELL SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID FLUID-LOADED PLATES; PROPAGATION; ADMITTANCE; VIBRATION; PRESSURE AB Monostatic scattering measurements over a ka range 2-30 made on two cylindrical shell structures, one with regular internal frames and one without, clearly demonstrate that the periodic discontinuities in the framed shell give rise to distinctive features in the scattering patterns at frequencies much lower than those at which Bragg scattering peaks can exist. These features are found to be even more dominant than those associated with the now well-known scattering from supersonic shear and compressional helical shell waves. When the measured scattering,levels are displayed as a function of frequency and aspect, these features manifest themselves as curves suggestive of folded-over dispersion curves of flexural waves. It will be shown that these effects are, in fact, due to scattering from Bloch or Floquet wave packets arising from the frame-induced multiple scattering of the subsonic flexural waves. The measured scattering functions are compared with predictions based on phase matching of the acoustic waves to flexural Bloch waves whose dispersion properties are computed using an approximate model. The simple model predictions agree well with the measured scattering data. RP PHOTIADIS, DM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 17 TC 24 Z9 25 U1 0 U2 8 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 NOV PY 1994 VL 96 IS 5 BP 2785 EP 2790 DI 10.1121/1.411378 PN 1 PG 6 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA PQ018 UT WOS:A1994PQ01800017 ER PT J AU RUCKMAN, CE FULLER, CR AF RUCKMAN, CE FULLER, CR TI NUMERICAL-SIMULATION OF ACTIVE STRUCTURAL-ACOUSTIC CONTROL FOR A FLUID-LOADED, SPHERICAL-SHELL SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID SOUND RADIATION; VIBRATION INPUTS; PLATES AB Numerical methods are used to investigate active structural-acoustic control, a noise control technique in which oscillating force inputs are applied directly on a flexible structure to control its acoustic behavior. The goal is to control acoustic radiation from a thin-walled shell submerged in a dense fluid and subjected to a persistent, pure-tone disturbance. For generality the fully coupled responses are found numerically, in this case using the computer program that combines finite-element and boundary-element techniques. A feedforward control approach uses linear quadratic optimal control theory to minimize the total radiated power. Results are given for a thin-walled spherical shell, and are compared to analytical results. The numerical solution is shown to be suitably accurate in predicting the radiated power, the control forces, and the residual responses as compared to the analytical solution. A relatively small number of control forces can achieve global reductions in acoustic radiation at low frequencies (k(0)a<1.7). A single point-force actuator reduces the radiated power due to a point-force excitation by up to 20 dB at resonance frequencies; between resonance frequencies, more actuators are required because of modal spillover. With multiple control forces, radiation can be reduced by 6-20 dB over the frequency range O2.0.CO;2 PG 12 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA PM969 UT WOS:A1994PM96900005 ER PT J AU CHEN, JM CHANG, CP AF CHEN, JM CHANG, CP TI A TECHNIQUE FOR ANALYZING OPTIMAL RELATIONSHIPS AMONG MULTIPLE SETS OF DATA FIELDS .2. A RELIABILITY CASE-STUDY SO MONTHLY WEATHER REVIEW LA English DT Article ID SYNOPTIC-SCALE DISTURBANCES AB In Part I a multiple-set canonical correlation analysis (MCCA) was proposed to generalize the conventional two-set canonical correlation analysis. The MCCA seeks the optimal correlation among more than two data fields through a diagonalization of the product or the squared product of the correlation matrices between selected (desired) field pairs. In this study a specific case is used to empirically test the sensitivities of the MCCA technique. The case study uses an MCCA application of the 850-hPa meridional wind data over the tropical western Pacific to study tropical synoptic wave disturbances during summer. Successive 12-h meridional winds are used as the different data fields. The results shows that the method is stable with respect to sampling changes when the data contain significant signals of physical phenomenon and not stable when the data are random. The study also confirms the use of the largest residual correlation, or the largest cross-component correlation, as a preliminary significance test for the technique. C1 USN,POSTGRAD SCH,DEPT METEOROL,MONTEREY,CA 93943. NR 4 TC 4 Z9 4 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0027-0644 J9 MON WEATHER REV JI Mon. Weather Rev. PD NOV PY 1994 VL 122 IS 11 BP 2494 EP 2505 DI 10.1175/1520-0493(1994)122<2494:ATFAOR>2.0.CO;2 PG 12 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA PM969 UT WOS:A1994PM96900006 ER PT J AU FISHER, DA SKOLNICK, A AF FISHER, DA SKOLNICK, A TI ACQUISITION REFORM AND BEST PRODUCT PROCUREMENT - AN ENGINEERING VIEW SO NAVAL ENGINEERS JOURNAL LA English DT Article AB The military services are being moved in the direction of performance-based specifications and standards. They are being steered against dictating ''how to'' produce an item since such action forecloses on the ability to gain access to components or technology that may have a commercial equivalent. Why should the engineering community embrace the new approach? Aside from the obvious weight of it being approved policy, therefore currently mandated, it warrants examination because it is the correct approach at this time when applied to appropriate products. Military specifications and standards are to be displaced then, by acceptable alternative contractor design solutions. Industry bidders will be allowed to propose the particular design details, permitting procurement flexibility by contractually citing only system level or interface requirements, both physical and functional. Hopefully, this can broaden the industrial base and increase competition with reduced costs to follow. Conceptually, the approach appears both performance-sensible and cost-attractive (there are, of course, consequent risks) but how does implementation proceed? Is it possible to pursue the goals envisioned along paths that are not in themselves experimental? Can the American postulate, minimal loss of life and limb to U.S. military people, continue to be honored? Experience and track record elsewhere imply encouraging possibilities in select situations-useful prospects are identified and discussed in practical terms. RP FISHER, DA (reprint author), USN,CTR SURFACE WARFARE,STAND HARDWARE ACQUISIT & RELIABIL PROGRAM,WASHINGTON,DC 20350, USA. NR 0 TC 2 Z9 2 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 NOV PY 1994 VL 106 IS 6 BP 41 EP 57 PG 17 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA PV312 UT WOS:A1994PV31200006 ER PT J AU DOLAN, RP AF DOLAN, RP TI ELECTRONIC DATA INTERCHANGE AND NAVAL AVIATION SO NAVAL ENGINEERS JOURNAL LA English DT Article AB With the Department of Defense (DoD) community facing declining budgets, reductions in workforce, and a shrinking business base, re-thinking of traditional methods of doing business is necessary. As part of the larger Federal government initiative, DoD has adopted Electronic Data Interchange (EDI) to improve its mission effectiveness and reduce operating costs. EDI is the paperless exchange of business information using standard, transaction-based formats. The EDI standard details how to format electronic messages that transmit information usually found on purchase orders, invoices, and other documents. The benefits of EDI to Naval Air Systems (NAVAIR) are more than just reducing paperwork, eliminating data entry errors, and receiving more timely data. EDI is a methodology to streamline functional processes; increase visibility of requirements to commercial activities; increase productivity through reduced cycle times; reduce material inventories, and develop electronic linkage from Navy information systems to DoD trading partners. This paper examines the technology of EDI, its uses, benefits, and explores some of the opportunities for EDI applications in the NAVAIR community such as: maintenance and engineering; procurement; and financial management. RP DOLAN, RP (reprint author), USN,AIR SYST COMMAND,CONTINUOUS ACQUISIT & LIFE CYCLE SUPPORT SECT,WASHINGTON,DC 20350, 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 NOV PY 1994 VL 106 IS 6 BP 59 EP 64 PG 6 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA PV312 UT WOS:A1994PV31200007 ER PT J AU LEE, EU WALDMAN, J AF LEE, EU WALDMAN, J TI CORROSION OF AIRCRAFT LANDING GEAR STEELS SO NAVAL ENGINEERS JOURNAL LA English DT Article AB Carrier-based aircraft landing gear demands a tough, corrosion-resistant material. Because of its high tensile strength, 300M steel was accepted as the standard material for aircraft landing gear. However, its corrosion resistance and fracture toughness are low, and is ill-suited for advanced aircraft landing gear. A newly developed nickel-cobalt alloy steel, named ''AerMet 100,'' has an outstanding combination of high fracture toughness and high tensile strength. Since its mechanical properties surpass those of the 300M steel, it has great potential for application to aircraft landing gear and other fracture critical components. However, its corrosion behavior was not fully understood. This study was initiated to characterize the corrosion behavior. The characterization effort included clarification of stress corrosion cracking, immersion corrosion, salt spray corrosion, and humidity corrosion of AerMet 100 steel. For comparison, an identical study was concurrently performed for 300M steel. The results indicate that AerMet 100 steel is superior to 300M steel with respect to corrosion resistance as well as mechanical properties. RP LEE, EU (reprint author), USN,CTR AIR WARFARE,DIV AIRCRAFT,WARMINSTER,PA 18974, USA. NR 0 TC 0 Z9 0 U1 0 U2 4 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 NOV PY 1994 VL 106 IS 6 BP 77 EP 83 PG 7 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA PV312 UT WOS:A1994PV31200010 ER PT J AU CENKO, A MOYER, S AF CENKO, A MOYER, S TI EVALUATION OF THE F/A-18E/F AIRCRAFT FLOWFIELD EFFECT ON THE HARM MISSILE SO NAVAL ENGINEERS JOURNAL LA English DT Article AB Over the past few years, many techniques for analyzing the aircraft flowfield effects on stores have been presented. Generally these methods have been employed in order to better define the flowfield interactions with the store of interest and to help define possible areas of the envelope where separation may be unsafe. Quite often, however, these techniques are applied too late in the integration process to have a positive impact on the eventual integration of the weapon on the aircraft. Additionally, most of these techniques have been applied to vertically separating stores. The present study concerns the integration of the HARM missile onto the F/A-18E/F aircraft. This study was undertaken in the earliest stages of the program tasked with integrating the missile on the aircraft. An existing analytical model of the F/A-18E/F was used to derive the flowfield of the F/A-18E/F. This model was then used to make a number of assessments concerning the difficulty of integrating stores onto the F/A-18E/F aircraft. RP CENKO, A (reprint author), USN,CTR AIR WARFARE,DIV AIRCRAFT,WASHINGTON,DC 20350, 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 NOV PY 1994 VL 106 IS 6 BP 85 EP 93 PG 9 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA PV312 UT WOS:A1994PV31200011 ER PT J AU DAGENAIS, DM BUCHOLTZ, F AF DAGENAIS, DM BUCHOLTZ, F TI MEASUREMENT AND ORIGIN OF MAGNETOSTRICTIVE NOISE LIMITATION IN MAGNETIC FIBEROPTIC SENSORS SO OPTICS LETTERS LA English DT Article ID SYSTEM AB Fiber-optic magnetic sensors based on magnetostriction yield 1/f-type noise, which has typically been limiting the sensors' resolution at frequencies below 1 Hz. To study the origin of this noise, we devised a new experimental technique that discriminates between the transducer self-noise and various other noise sources and determines under which conditions the limiting noise source is the material's self-noise. C1 SFA INC,LANDOVER,MD 20785. RP DAGENAIS, DM (reprint author), USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375, USA. NR 11 TC 5 Z9 5 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD NOV 1 PY 1994 VL 19 IS 21 BP 1699 EP 1701 DI 10.1364/OL.19.001699 PG 3 WC Optics SC Optics GA PN868 UT WOS:A1994PN86800009 PM 19855626 ER PT J AU DENNIS, ML DULING, IN AF DENNIS, ML DULING, IN TI 3RD-ORDER DISPERSION IN FEMTOSECOND FIBER LASERS SO OPTICS LETTERS LA English DT Article ID GUIDING-CENTER SOLITON; PASSIVE-MODE LOCKING; 3RD-ORDER DISPERSION; OPTICAL FIBERS; GROUP-DELAY; RING LASER; GENERATION; WAVELENGTH AB We experimentally investigate the effects of third-order dispersion (TOD) on ultrafast sources, using dispersion-compensated femtosecond fiber lasers. By in situ measurement of the intracavity dispersion, we identify spectral resonances that are due to coupling of the cavity pulse energy to dispersive wave components at the phase velocity and group-velocity-matched wavelengths. We obtain pulse widths as short as 91 fs by partially compensating the TOD. We relate the observed effects to consequences for soliton transmission and operation of other solitary-pulse lasers. RP DENNIS, ML (reprint author), USN,RES LAB,CODE 5671,WASHINGTON,DC 20375, USA. NR 21 TC 8 Z9 8 U1 2 U2 10 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD NOV 1 PY 1994 VL 19 IS 21 BP 1750 EP 1752 DI 10.1364/OL.19.001750 PG 3 WC Optics SC Optics GA PN868 UT WOS:A1994PN86800026 PM 19855643 ER PT J AU YU, HY SANDAY, SC AF YU, HY SANDAY, SC TI DISLOCATIONS AD DISCLINATIONS IN TRANSVERSELY ISOTROPIC ELASTIC SOLIDS SO PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES LA English DT Article ID BIMATERIALS; FORCE AB A recently developed method to obtain the elastic fields due to defects in isotropic solids has been extended to include the case of fields due to dislocations and disclinations with arbitrary orientations in transversely isotropic infinite solids. The extension hinges on the introduction of a newly defined stress vector function, the hexagonal stress vector, which, together with the Green functions for double force and for double force with moment, yields closed-form solutions. The solution is first obtained for infinitesimal Volterra dislocation loops. The elastic fields due to dislocations and disclinations are then obtained by integrating the solution for the infinitesimal loop over the surface of the cut that generates the line defects. Along with the Newtonian and biharmonic potential functions that are used for isotropic solids, two more harmonic potential functions are introduced to express the solution in transversely isotropic solids. Closed-form solutions for straight dislocation and disclination lines, and circular dislocation loops are presented as examples to illustrate the application of the method. RP YU, HY (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 28 TC 13 Z9 13 U1 0 U2 3 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0141-8610 J9 PHILOS MAG A JI Philos. Mag. A-Phys. Condens. Matter Struct. Defect Mech. Prop. PD NOV PY 1994 VL 70 IS 5 BP 725 EP 738 PG 14 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA PQ062 UT WOS:A1994PQ06200001 ER PT J AU WICK, CE AF WICK, CE TI EYE TRACKING SO PHOTONICS SPECTRA LA English DT Article RP WICK, CE (reprint author), USN ACAD,DEPT WEAPONS & SYST ENGN,ANNAPOLIS,MD 21402, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LAURIN PUBL CO INC PI PITTSFIELD PA BERKSHIRE COMMON PO BOX 1146, PITTSFIELD, MA 01202 SN 0731-1230 J9 PHOTON SPECTRA JI Photon. Spect. PD NOV PY 1994 VL 28 IS 11 BP 75 EP 75 PG 1 WC Optics SC Optics GA PQ578 UT WOS:A1994PQ57800027 ER PT J AU RAJAGOPAL, AK AF RAJAGOPAL, AK TI TIME-DEPENDENT FUNCTIONAL THEORY OF COUPLED ELECTRON AND ELECTROMAGNETIC-FIELDS IN CONDENSED-MATTER SYSTEMS SO PHYSICAL REVIEW A LA English DT Article ID GAS RP RAJAGOPAL, AK (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 26 TC 30 Z9 30 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD NOV PY 1994 VL 50 IS 5 BP 3759 EP 3765 DI 10.1103/PhysRevA.50.3759 PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA PR435 UT WOS:A1994PR43500029 ER PT J AU MANSOUR, AN WONG, CP BRIZZOLARA, RA AF MANSOUR, AN WONG, CP BRIZZOLARA, RA TI ATOMIC-STRUCTURE OF AMORPHOUS AL100-2XCOXCEX (X=8, 9, AND 10) AND AL80FE10CE10 ALLOYS - AN XAFS STUDY SO PHYSICAL REVIEW B LA English DT Article ID X-RAY-ABSORPTION; METALLIC GLASSES; FINE-STRUCTURE; ALUMINUM; EXAFS; AL90FEXCE10-X; CRITERIA; SPECTRA RP MANSOUR, AN (reprint author), USN,CTR SURFACE WARFARE,DEPT WEAP RES & TECHNOL,DAHLGREN DIV,CODE R34,BLDG 30-213,SILVER SPRING,MD 20903, USA. NR 28 TC 63 Z9 65 U1 0 U2 6 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 NOV 1 PY 1994 VL 50 IS 17 BP 12401 EP 12412 DI 10.1103/PhysRevB.50.12401 PG 12 WC Physics, Condensed Matter SC Physics GA PR261 UT WOS:A1994PR26100015 ER PT J AU RUBINSTEIN, M HARRIS, VG DAS, BN KOON, NC AF RUBINSTEIN, M HARRIS, VG DAS, BN KOON, NC TI MAGNETIC-PROPERTIES OF CU80CO20 AND CU80CO15FE5 MELT-SPUN RIBBONS SO PHYSICAL REVIEW B LA English DT Article ID GIANT MAGNETORESISTANCE; RESONANCE; SYSTEMS; ALLOYS; CR RP RUBINSTEIN, M (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Harris, Vincent/A-8337-2009 NR 21 TC 39 Z9 43 U1 1 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 NOV 1 PY 1994 VL 50 IS 17 BP 12550 EP 12558 DI 10.1103/PhysRevB.50.12550 PG 9 WC Physics, Condensed Matter SC Physics GA PR261 UT WOS:A1994PR26100031 ER PT J AU KIM, CC DREWS, AR SKELTON, EF QADRI, SB OSOFSKY, MS REEVES, ME LIEBENBERG, DH AF KIM, CC DREWS, AR SKELTON, EF QADRI, SB OSOFSKY, MS REEVES, ME LIEBENBERG, DH TI VOLUME DEPENDENCE OF THE SUPERCONDUCTING TRANSITION-TEMPERATURE FOR THE HIGH-TEMPERATURE SUPERCONDUCTOR HGBA2CA2-XPBXCU(3)O(8+DELTA) SO PHYSICAL REVIEW B LA English DT Article ID PRESSURE-DEPENDENCE; 6 GPA; SYSTEM; HGBA2CA2CU3O8+DELTA; HGBA2CUO4+DELTA; 150-K; T(C); TC C1 USN, RES LAB, DIV CONDENSED MATTER & RADIAT SCI, WASHINGTON, DC 20375 USA. USN, RES LAB, DIV MAT SCI & TECHNOL, WASHINGTON, DC 20375 USA. GEORGE WASHINGTON UNIV, DEPT PHYS, WASHINGTON, DC 20052 USA. USN, RES OFF, ARLINGTON, VA 22217 USA. RI Osofsky, Michael/A-1050-2010 NR 39 TC 5 Z9 5 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1994 VL 50 IS 18 BP 13778 EP 13785 DI 10.1103/PhysRevB.50.13778 PG 8 WC Physics, Condensed Matter SC Physics GA PT410 UT WOS:A1994PT41000083 ER PT J AU CARR, TW SCHWARTZ, IB AF CARR, TW SCHWARTZ, IB TI CONTROLLING UNSTABLE STEADY-STATES USING SYSTEM PARAMETER VARIATION AND CONTROL DURATION SO PHYSICAL REVIEW E LA English DT Article ID CONTROLLING CHAOS; ORBITS; LASER RP CARR, TW (reprint author), USN,RES LAB,DIV PLASMA PHYS,SPECIAL PROJECT NONLINEAR SCI,CODE 67003,WASHINGTON,DC 20375, USA. RI Schwartz, Ira/A-8073-2009 NR 16 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 NOV PY 1994 VL 50 IS 5 BP 3410 EP 3415 DI 10.1103/PhysRevE.50.3410 PG 6 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA PV863 UT WOS:A1994PV86300026 ER PT J AU UHM, HS BENMENAHEM, S YU, D AF UHM, HS BENMENAHEM, S YU, D TI DIOCOTRON INSTABILITY OF A RELATIVISTIC SHEET ELECTRON-BEAM PROPAGATING THROUGH A RECTANGULAR CONDUCTING WALL SO PHYSICS OF PLASMAS LA English DT Article ID GEOMETRY; FLOW AB Properties of the diocotron instability in a relativistic sheet electron beam propagating through a rectangular conducting wall are investigated within the framework of a macroscopic cold fluid model. The electron beam is assumed to be partially neutralized by the positive immobile ions with the fractional charge neutralization f. The eigenvalue equation is obtained for low-frequency perturbations in standing waves. The dispersion relation of the diocotron instability is derived and used to investigate stability properties for a broad range of system parameters including the ratio a/d of the beam thickness (2a) to the conductor gap (2d) and the charge neutralization f. The dispersion relation indicates that the system is stabilized by increasing the neutralization f to 1/gamma(b)2, where gamma(b) is the characteristic value of the beam relativistic factor. It is also shown that the diocotron perturbations are completely stabilized by increasing the beam thickness to more than one-half the conductor gap (i.e., a/d>0.5) for f=0. The growth rate of instability is a substantial fraction of the diocotron frequency if the system is unstable. C1 DULY RES INC,RANCHO PALOS VERDES,CA 90732. RP UHM, HS (reprint author), USN,CTR SURFACE WARFARE,10901 NEW HAMPSHIRE AVE,SILVER SPRING,MD 20903, USA. NR 15 TC 5 Z9 8 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD NOV PY 1994 VL 1 IS 11 BP 3686 EP 3692 DI 10.1063/1.870903 PG 7 WC Physics, Fluids & Plasmas SC Physics GA PP156 UT WOS:A1994PP15600020 ER PT J AU CHOI, IS ROLAND, CM BISSONNETTE, LC AF CHOI, IS ROLAND, CM BISSONNETTE, LC TI AN ELASTOMERIC EJECTION SYSTEM SO RUBBER CHEMISTRY AND TECHNOLOGY LA English DT Article ID RUBBER; NETWORKS; SBR AB The ability of elastomers to store large quantities of energy, which can subsequently be recovered very quickly, makes them attractive materials for propulsion devices. Recently the U.S. Navy has developed a torpedo ejection system based on an elastomeric mechanical capacitor. The criteria governing selection of a material for this application include high elastic energy, sufficient fatigue life, minimal creep, and resistance to deterioration by seawater. This paper describes various approaches to obtaining these material properties. C1 USN, CTR UNDERSEA WARFARE, NEWPORT, RI 02841 USA. RP USN, RES LAB, CODE 6120, WASHINGTON, DC 20375 USA. NR 42 TC 14 Z9 15 U1 0 U2 1 PU AMER CHEMICAL SOC INC PI AKRON PA RUBBER DIV UNIV AKRON PO BOX 499, AKRON, OH 44309-0499 USA SN 0035-9475 EI 1943-4804 J9 RUBBER CHEM TECHNOL JI Rubber Chem. Technol. PD NOV-DEC PY 1994 VL 67 IS 5 BP 892 EP 903 DI 10.5254/1.3538720 PG 12 WC Polymer Science SC Polymer Science GA QE808 UT WOS:A1994QE80800014 ER PT J AU MARTIN, DL AF MARTIN, DL TI NAVY OPERATIONAL OCEANOGRAPHY INITIATIVES SO SEA TECHNOLOGY LA English DT Article RP MARTIN, DL (reprint author), USN, OCEANOG OFF, BAY ST LOUIS, MS USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU COMPASS PUBLICATIONS, INC PI ARLINGTON PA 1501 WILSON BLVD., STE 1001, ARLINGTON, VA 22209-2403 USA SN 0093-3651 J9 SEA TECHNOL JI Sea Technol. PD NOV PY 1994 VL 35 IS 11 BP 27 EP + PG 1 WC Engineering, Ocean SC Engineering GA PU126 UT WOS:A1994PU12600004 ER PT J AU WEILAND, RD RICKERSON, J AF WEILAND, RD RICKERSON, J TI SEAFAC STATIC ACOUSTIC SITE SO SEA TECHNOLOGY LA English DT Article AB Southeast Alaska Acoustic Facility Determines Deficiencies, Evaluates Effectiveness of Improvements C1 APPL MEASUREMENT SYST INC,BREMERTON,WA. RP WEILAND, RD (reprint author), USN,CTR SURFACE WARFARE,CARDEROCK DIV DETACHMENT PUGET SOUND,BREMERTON,WA, USA. NR 0 TC 0 Z9 0 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 NOV PY 1994 VL 35 IS 11 BP 45 EP & PG 0 WC Engineering, Ocean SC Engineering GA PU126 UT WOS:A1994PU12600007 ER PT J AU MCQUEARY, WB AF MCQUEARY, WB TI RESEARCH-AND-DEVELOPMENT REQUIRED FOR REMOTE-SENSING SO SEA TECHNOLOGY LA English DT Article AB To Support NAVOCEANO Efforts to Define the Littoral, Remote Sensing From Multiple Sources is Required RP MCQUEARY, WB (reprint author), USN,DIV REMOTE SENSING,OCEANOG OFF,BAY ST LOUIS,MS, USA. NR 0 TC 1 Z9 1 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 NOV PY 1994 VL 35 IS 11 BP 53 EP & PG 0 WC Engineering, Ocean SC Engineering GA PU126 UT WOS:A1994PU12600009 ER PT J AU LIN, KC SCHAB, DE AF LIN, KC SCHAB, DE TI THE PERFORMANCE ASSESSMENT OF THE DEAD RECKONING ALGORITHMS IN DIS SO SIMULATION LA English DT Article DE DISTRIBUTED INTERACTIVE SIMULATION (DIS); DEAD RECKONING AB Dead reckoning plays a vital role in the continuing development of Distributed Interactive Simulation. Dead reckoning algorithms, when formulated to suit the particular needs of a given simulation network, offer optimal realism and speed through a reduction in update traffic within a network. The Dead Reckoning Assessment Tool, an innovative software program, accepts input from users concerning specifications unique to their exercise environments and allows tem to quickly and easily evaluate promising dead reckoning algorithms. C1 USN,CTR AIR WARFARE,DIV TRAINING SYST,FIGHTER ATTACK BRANCH,ORLANDO,FL 32826. RP LIN, KC (reprint author), UNIV CENT FLORIDA,INST SIMULAT & TRAINING,ORLANDO,FL 32826, USA. NR 9 TC 6 Z9 10 U1 0 U2 0 PU SIMULATION COUNCILS INC PI SAN DIEGO PA PO BOX 17900, SAN DIEGO, CA 92117 SN 0037-5497 J9 SIMULATION JI Simulation PD NOV PY 1994 VL 63 IS 5 BP 318 EP 325 DI 10.1177/003754979406300507 PG 8 WC Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering SC Computer Science GA PU125 UT WOS:A1994PU12500005 ER PT J AU SEATON, JB AF SEATON, JB TI LOW-LEVEL CONFLICT SO SOCIETY LA English DT Article C1 USN ACAD,FAC POLIT SCI,ANNAPOLIS,MD 21402. NR 7 TC 0 Z9 0 U1 0 U2 0 PU TRANSACTION PERIOD CONSORTIUM PI NEW BRUNSWICK PA DEPT 3091 RUTGERS-THE STATE UNIV OF NJ, NEW BRUNSWICK, NJ 08903 SN 0147-2011 J9 SOCIETY JI Society PD NOV-DEC PY 1994 VL 32 IS 1 BP 10 EP 16 DI 10.1007/BF02693347 PG 7 WC Social Sciences, Interdisciplinary; Sociology SC Social Sciences - Other Topics; Sociology GA PP624 UT WOS:A1994PP62400008 ER PT J AU DIAMANT, JC AMUNDSON, DE AF DIAMANT, JC AMUNDSON, DE TI ANION GAP IN METABOLIC ALKALOSIS - REPLY SO SOUTHERN MEDICAL JOURNAL LA English DT Letter RP DIAMANT, JC (reprint author), USN,MED CTR,SAN DIEGO,CA 92152, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU SOUTHERN MEDICAL ASSN PI BIRMINGHAM PA 35 LAKESHORE DR PO BOX 190088, BIRMINGHAM, AL 35219 SN 0038-4348 J9 SOUTHERN MED J JI South.Med.J. PD NOV PY 1994 VL 87 IS 11 BP 1192 EP 1193 DI 10.1097/00007611-199411000-00033 PG 2 WC Medicine, General & Internal SC General & Internal Medicine GA PR087 UT WOS:A1994PR08700033 ER PT J AU WILLIAMS, HEF YANG, TC KILLE, RM AF WILLIAMS, HEF YANG, TC KILLE, RM TI LABORATORY-SCALE MEASUREMENT OF SCATTERING FROM MODELED ARCTIC ICE RIDGES SO ULTRASONICS LA English DT Article DE SCALE MODELING; UNDERWATER SOUND; FORWARD AND BACKWARD SCATTERING ID RANGE AB An experiment is performed to measure acoustic scattering from scale modelled ice ridges in both specular (forward) and non-specular (backward) directions, for comparison with predictions from theoretical models. The experiment uses a 100 kHz transmitter emitting sinusoidal bursts. An array of miniature transducers is used to measure the scattered field as a function of scattering angle. Experimental results are obtained for scattering from different types of rods simulating ice ridges, and also the reflection coefficient from an acrylic block. The results show good agreement with the Twersky model predictions. This experiment establishes an effective technique, using scale models in the laboratory, to compare theoretical predictions and field experimental data. C1 USN,RES LAB,DIV ACOUST,WASHINGTON,DC 20375. RP WILLIAMS, HEF (reprint author), AMERICAN UNIV,COLL ARTS & SCI,DEPT PHYS,WASHINGTON,DC 20016, USA. NR 20 TC 1 Z9 1 U1 0 U2 0 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0041-624X J9 ULTRASONICS JI Ultrasonics PD NOV PY 1994 VL 32 IS 6 BP 441 EP 446 DI 10.1016/0041-624X(94)90063-9 PG 6 WC Acoustics; Radiology, Nuclear Medicine & Medical Imaging SC Acoustics; Radiology, Nuclear Medicine & Medical Imaging GA PQ233 UT WOS:A1994PQ23300005 ER PT J AU ZVANUT, ME CARLOS, WE FREITAS, JA JAMISON, KD HELLMER, RP AF ZVANUT, ME CARLOS, WE FREITAS, JA JAMISON, KD HELLMER, RP TI IDENTIFICATION OF PHOSPHORUS IN DIAMOND THIN-FILMS USING ELECTRON-PARAMAGNETIC-RESONANCE SPECTROSCOPY SO APPLIED PHYSICS LETTERS LA English DT Article ID NITROGEN AB An electron paramagnetic-resonance study of diamond films doped by implantation of phosphorus during film deposition is reported. Samples with nominal phosphorus concentration between 10(16) and 10(17) cm(-3) exhibit two isotropic lines of equal intensity separated by 27 G. The double-line spectrum is expected for a nuclear-spin 1/2 species such as phosphorus. The symmetry of the center and the temperature dependence of the spin concentration suggest that phosphorus forms a substitutional shallow donor in diamond. (c) 1994 American institute of Physics. C1 USN,RES LAB,WASHINGTON,DC 20375. SI DIAMOND TECHNOL,HOUSTON,TX 77098. RP ZVANUT, ME (reprint author), UNIV ALABAMA,BIRMINGHAM,AL 35294, USA. NR 17 TC 33 Z9 35 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 OCT 31 PY 1994 VL 65 IS 18 BP 2287 EP 2289 DI 10.1063/1.112720 PG 3 WC Physics, Applied SC Physics GA PP717 UT WOS:A1994PP71700015 ER PT J AU LIN, HB CAMPILLO, AJ AF LIN, HB CAMPILLO, AJ TI CW NONLINEAR OPTICS IN DROPLET MICROCAVITIES DISPLAYING ENHANCED GAIN SO PHYSICAL REVIEW LETTERS LA English DT Article ID INHIBITED SPONTANEOUS EMISSION; DIELECTRIC MICROSPHERES; CAVITY; MICRODROPLETS; SCATTERING; RESONANCES; ABSORPTION; ATOM AB A variety of stimulated nonlinear optical processes are observed under relatively low intensity cw excitation in droplet spherical microcavities. These include stimulated Raman and Rayleigh-wing scattering as well as four-wave parametric oscillation. The low thresholds for these stimulated processes are accounted for by all waves being in resonance with high-Q droplet modes and by the existence of a significant cavity QED enhancement (> 100 times) in the nonlinear gain coefficients. RP LIN, HB (reprint author), USN,RES LAB,OPT PHYS BRANCH,CODE 5610,WASHINGTON,DC 20375, USA. NR 28 TC 101 Z9 102 U1 1 U2 11 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 OCT 31 PY 1994 VL 73 IS 18 BP 2440 EP 2443 DI 10.1103/PhysRevLett.73.2440 PG 4 WC Physics, Multidisciplinary SC Physics GA PP693 UT WOS:A1994PP69300017 ER PT J AU PIERSON, SW AF PIERSON, SW TI CRITICAL-BEHAVIOR OF VORTICES IN A LAYERED SYSTEM SO PHYSICAL REVIEW LETTERS LA English DT Article ID KOSTERLITZ-THOULESS TRANSITION; HIGH-TC SUPERCONDUCTORS; PHASE-TRANSITIONS; SINGLE-CRYSTALS; VORTEX; FLUCTUATIONS; MODEL; FILMS; JUMP AB The critical behavior of vortices interacting in zero field in a system of weakly coupled layers is studied. A mathematically rigorous, real-space renormalization group study is carried out and the recursion relations derived. A new term is found which corresponds to the effect of vortex fluctuations on the interlayer coupling and which tends to decouple the layers just above the transition, a result which is consistent with Monte Carlo studies. The effect of vortices in neighboring layers on the critical behavior is also studied. We find that it reinforces slightly the upward shift of the transition temperature with the interlayer coupling, but is otherwise minimal over most of the temperature range. RP PIERSON, SW (reprint author), USN,RES LAB,CODE 6877,WASHINGTON,DC 20375, USA. NR 26 TC 35 Z9 35 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 OCT 31 PY 1994 VL 73 IS 18 BP 2496 EP 2499 DI 10.1103/PhysRevLett.73.2496 PG 4 WC Physics, Multidisciplinary SC Physics GA PP693 UT WOS:A1994PP69300031 ER PT J AU DUNLAP, BI TAYLOR, R AF DUNLAP, BI TAYLOR, R TI OCTAHEDRAL C-48 AND UNIFORM STRAIN SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter ID ELECTRONIC-STRUCTURES; FULLERENES; BUCKMINSTERFULLERENE; APPROXIMATIONS; CARBON; C-60 AB The geometry of octahedrally symmetric C-48 has been optimized using a local density functional. All the atoms are equivalent by symmetry, so the molecule has a unique radius. This radius, the vertical ionization potentials, and electron affinity of C-48 are compared to the corresponding values for C-60. C1 UNIV SUSSEX,SCH CHEM & MOLEC SCI,BRIGHTON BN1 9QJ,E SUSSEX,ENGLAND. RP DUNLAP, BI (reprint author), USN,RES LAB,THEORET CHEM SECT,CODE 6179,WASHINGTON,DC 20375, USA. OI Dunlap, Brett/0000-0003-1356-6559 NR 15 TC 32 Z9 32 U1 0 U2 2 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 OCT 27 PY 1994 VL 98 IS 43 BP 11018 EP 11019 DI 10.1021/j100094a007 PG 2 WC Chemistry, Physical SC Chemistry GA PN858 UT WOS:A1994PN85800007 ER PT J AU TALLURI, KT WAGNER, DK AF TALLURI, KT WAGNER, DK TI ON THE K-CUT SUBGRAPH POLYTOPE SO MATHEMATICAL PROGRAMMING LA English DT Article DE MINIMUM CUT PROBLEM; NETWORK FLOWS; RELIABILITY AB We consider the problem of finding a minimum-cost set of k pairwise-disjoint (s,t)-cuts in a graph. For non-negative costs, this problem was solved independently by Nishihara and Inoue, and Wagner. Both solutions involve formulating the problem as a linear-programming problem. In this paper, we give new polyhedral interpretations of the problem. Relationships to the path formulation of the maximum-flow problem are also established. C1 OFF NAVAL RES,DIV MATH SCI,ARLINGTON,VA 22217. USAIR,OPERAT RES DEPT,ARLINGTON,VA 22227. NR 8 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0025-5610 J9 MATH PROGRAM JI Math. Program. PD OCT 26 PY 1994 VL 67 IS 1 BP 121 EP 132 DI 10.1007/BF01582217 PG 12 WC Computer Science, Software Engineering; Operations Research & Management Science; Mathematics, Applied SC Computer Science; Operations Research & Management Science; Mathematics GA PQ699 UT WOS:A1994PQ69900008 ER PT J AU SEDEGAH, M FINKELMAN, F HOFFMAN, SL AF SEDEGAH, M FINKELMAN, F HOFFMAN, SL TI INTERLEUKIN-12 INDUCTION OF INTERFERON-GAMMA DEPENDENT PROTECTION AGAINST MALARIA SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID CELL STIMULATORY FACTOR; HEPATOCYTES; NKSF AB Intraperitoneal injection of recombinant Interleukin 12 (rIL-12) at 30 ng/day for 5 days beginning 1 to 2 days before sporozoite challenge or administration of a single dose of 150 ng of rIL-12 2 days before challenge protected 100% of BALB/c mice against challenge with 10(2) Plasmodium yoelii sporozoites. rIL-12-induced protection was eliminated in all mice by administration of a monoclonal antibody against interferon gamma and in 50% of mice by administration of N-G-monomethyl-L-arginine, a competitive inhibitor of nitric oxide synthase. rIL-12 protected BALB/c mice treated with cytotoxic anti-CD4 and anti-CD8 monoclonal antibodies, as well as T-cell- and B-cell-deficient severe combined immunodeficiency mice. These data suggest that rIL-12 stimulates non-B, non-T cells to produce interferon gamma that kills intrahepatic parasites by stimulating nitric oxide production. If rIL-12 proves to be well tolerated by humans, our findings support consideration of rIL-12 as an immunoprophylactic against malaria. C1 USN,MED RES INST,MALARIA PROGRAM,BETHESDA,MD 20889. UNIFORMED SERV UNIV HLTH SCI,BETHESDA,MD 20889. NR 20 TC 167 Z9 168 U1 0 U2 0 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD OCT 25 PY 1994 VL 91 IS 22 BP 10700 EP 10702 DI 10.1073/pnas.91.22.10700 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PP698 UT WOS:A1994PP69800095 PM 7938013 ER PT J AU MARISKA, JT AF MARISKA, JT TI FLARE PLASMA DYNAMICS OBSERVED WITH THE YOHKOH BRAGG CRYSTAL SPECTROMETER .2. PROPERTIES OF THE FE-XXV, CA-XIX, AND S-XV RESONANCE LINES SO ASTROPHYSICAL JOURNAL LA English DT Article DE PLASMAS; SUN, FLARES; SUN, X-RAYS, GAMMA RAYS ID SOLAR-FLARES; IMPULSIVE PHASE; EVAPORATION AB Using data from the Bragg Crystal Spectrometer (BCS) on the Yohkoh spacecraft, we have computed measures of the total intensity, centroid position, and line widths for the resonance lines of Fe XXV, Ca XIX, and S XV during the rise phase and after maximum for 190 solar flares. The difference between centroid positions early and late in each flare yields a measure of the line-of-sight velocity shift of the line centroids. Roughly 25% of the flares show evidence for spatial shifts of the emitting plasma during the flare. For all three resonance lines in those flares that show only Doppler shifts, we find a trend in the average value of the centroid shift with distance from Sun center suggesting radial mass motions with characteristic velocities of 76, 63, and 58 km s-1 in the resonance lines of Fe XXV, Ca XIX, and S XV, respectively. For each resonance line there is also a correlation between the rise-phase line widths and the centroid shift. For each resonance line we find no correlation between the centroid shift and the peak intensity, rise time, and total flare duration; and no correlation between the line width and the distance from Sun center, peak intensity, rise time, and total flare duration. Comparing data from the different BCS wavelength channels, we find that the centroid shift in each channel is correlated with the centroid shifts in the other channels. Similarly, the line width in each channel is correlated with the line width in the other channels. RP MARISKA, JT (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 7673,WASHINGTON,DC 20375, USA. NR 15 TC 52 Z9 53 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 OCT 20 PY 1994 VL 434 IS 2 BP 756 EP 765 DI 10.1086/174778 PN 1 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PL837 UT WOS:A1994PL83700038 ER PT J AU DAHLBURG, RB KARPEN, JT AF DAHLBURG, RB KARPEN, JT TI TRANSITION TO TURBULENCE IN SOLAR SURGES SO ASTROPHYSICAL JOURNAL LA English DT Article DE MHD; SUN, RADIO RADIATION; TURBULENCE ID TEARING MODE-INSTABILITY; SECONDARY INSTABILITY; MAGNETOHYDRODYNAMIC TURBULENCE; RESISTIVE INSTABILITIES; FLOWING PLASMA; SHEAR-FLOW; VISCOSITY; ASSOCIATION; MECHANISM; BURSTS AB Transition to turbulence in magnetohydrodynamic tearing jets has been invoked as a mechanism underlying some of the complex behavior observed in solar surges, including deceleration of the upflowing plasma and temporal correlations with types I and III radio bursts. In this paper we investigate a possible mechanism for this transition: three-dimensional secondary instabilities on two-dimensional saturated states. We find through linear analysis that these MHD configurations-in particular, the tearing jet-are secondarily unstable, with the dominant energy transfer from the one-dimensional field into the 3-dimensional fields. Using nonlinear simulations, we also investigate the system evolution after the secondary modes attain finite amplitude. When the tearing jet transitions to turbulence, the total kinetic energy drops rapidly corresponding to the deceleration of the jet. The electric field grows rapidly as the primary mode saturates and the three-dimensional secondary mode develops, and then decays quickly as the tearing jet becomes turbulent, providing a possible explanation for the finite duration of the associated meter-wave bursts. The electric field decays as the magnetic and velocity fields both decay. The system is dominated at late times by spanwise modes, which strongly resemble the magnetic field-aligned filamentary flows characteristic of many surges. C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RP DAHLBURG, RB (reprint author), USN,RES LAB,COMPUTAT PHYS & FLUID DYNAM LAB,CODE 6440,WASHINGTON,DC 20375, USA. RI Karpen, Judith/E-1484-2012 NR 36 TC 24 Z9 24 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD OCT 20 PY 1994 VL 434 IS 2 BP 766 EP 772 DI 10.1086/174779 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PL837 UT WOS:A1994PL83700039 ER PT J AU BALL, DW PONG, RGS KAFAFI, ZH AF BALL, DW PONG, RGS KAFAFI, ZH TI REACTIONS OF ATOMIC AND DIATOMIC IRON WITH METHYLACETYLENE IN SOLID ARGON SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID ELECTRON-SPIN-RESONANCE; MATRIX-ISOLATION; FTIR SPECTRUM; CRYOGENIC MATRICES; MOLECULAR COMPLEX; ETHYLENE-OXIDE; DIIRON COMPLEX; ACETYLENE; ALLENE; PHOTOCHEMISTRY AB The chemistry of atomic and diatomic iron with methylacetylene (MA) in argon matrices has been studied using Fourier transform infrared spectroscopy. Cocondensation of iron vapors with MA results in the formation of atomic iron and diatomic iron complexes with MA. Vibrational spectra indicate that the atomic Fe(MA) complex is sigma bonding with one or more hydrogen atoms, whereas Fe-2(MA) exhibits a spectrum that is characteristic of a pi complex. Photolysis of the diiron-methylacetylene complex with low-energy visible Light (lambda > 670 nm) causes its isomerization into Fe-2(H2C=C=CH2). Upon exposure of the matrix to visible light (lambda > 500 nm), photoisomerization of methylacetylene into allene with the subsequent C-H bond activation of allene is observed. The photoproduct has been characterized as the metal atom insertion compound, propadienyliron hydride (HFeHC=C=CH2). Excitation of the Fe(MA) sigma complex with shorter wavelength visible light (lambda > 400 nm) leads to the activation of the acetylenic C-H bond via metal atom insertion and formation of 1-propynyliron hydride. Photolysis with ultraviolet light (280 MI < lambda < 360 nm) causes activation of one of the methyl C-H bonds as well as the carbon-carbon single bond of MA. The photoproducts have been identified as 3-propynyliron hydride and ethynylmethyliron, respectively. Experiments using various deuterated forms of methylacetylene (CH3C equivalent to CD, CD3C equivalent to CH, CD3C equivalent to CD) support the characterization of these products and their vibrational mode assignments. C1 USN,RES LAB,WASHINGTON,DC 20375. CLEVELAND STATE UNIV,DEPT CHEM,CLEVELAND,OH 44115. NR 34 TC 9 Z9 9 U1 0 U2 6 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 OCT 20 PY 1994 VL 98 IS 42 BP 10720 EP 10727 DI 10.1021/j100093a009 PG 8 WC Chemistry, Physical SC Chemistry GA PN080 UT WOS:A1994PN08000009 ER PT J AU YODER, JA ACKLESON, SG BARBER, RT FLAMENT, P BALCH, WM AF YODER, JA ACKLESON, SG BARBER, RT FLAMENT, P BALCH, WM TI A LINE IN THE SEA SO NATURE LA English DT Article ID EASTERN EQUATORIAL PACIFIC; GEOSTATIONARY SATELLITE; LONG WAVES; OCEAN; OSCILLATIONS; SHELF; FRONT AB THE ocean has considerable spatial and temporal heterogeneity in biomass and productivity owing in part to the effects of ocean circulation and mixing(1,2). Water mass boundaries (fronts) in coastal waters are well-known sites of enhanced biological activity(3,4). Comparatively little is known of open-ocean fronts, and one of the few biological studies of an oceanic front showed phytoplankton biomass at only slightly higher densities than in surrounding waters(5). Here we present photographs and measurements from satellites, aircraft, ships and the Space Shuttle Atlantis which show dramatic biological responses to circulation and mixing processes associated with an open-ocean front. Breaking waves (whitecaps) caused by water turbulence and mixing, and very dark green water caused by extremely high concentrations (>20 mg of chlorophyll a per m(3)) of buoyant diatoms (Rhizosolenia sp.) made a distinct line in the sea visible for hundreds of kilometres. The line traced the northern edge of a westward-progagating (50 km per day) tropical instability wave (1,000-km wavelength) delineating the boundary between cold, upwelled waters and warmer waters to the north. High phytoplankton biomass and primary production associated with the extensive diatom patches may explain anecdotal observations of high animal abundance along this frontal boundary. C1 OFF NAVAL RES,OCEAN OPT PROGRAM,ARLINGTON,VA 22217. DUKE UNIV,MARINE LAB,BEAUFORT,NC 28516. UNIV HAWAII,DEPT OCEANOG,HONOLULU,HI 96822. UNIV MIAMI,ROSENSTIEL SCH MARINE & ATMOSPHER SCI,MIAMI,FL 33149. RP YODER, JA (reprint author), UNIV RHODE ISL,GRAD SCH OCEANOG,S FERRY RD,NARRAGANSETT,RI 02882, USA. OI yoder, james/0000-0002-2700-8681 NR 19 TC 227 Z9 231 U1 1 U2 25 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD OCT 20 PY 1994 VL 371 IS 6499 BP 689 EP 692 DI 10.1038/371689a0 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PM773 UT WOS:A1994PM77300051 ER PT J AU GROSHENS, TJ JOHNSON, CE AF GROSHENS, TJ JOHNSON, CE TI PYROLYSIS AND FILM GROWTH-STUDIES OF PHOSPHINOBORANE COMPOUNDS SO JOURNAL OF ORGANOMETALLIC CHEMISTRY LA English DT Article DE BORON; CHEMICAL VAPOR DEPOSITION; THIN FILMS AB Chemical vapor deposition experiments were conducted using phosphinoborane compounds of the type [R2BPR'2]m, where R = CH2CH3 (1) or CH3 (2), R' = C(CH3)3, and R = CH2CH3 (3) or CH3 (4), R' = Si(CH3)3. Thin films were deposited on Si substrates at 300-850-degrees-C under vacuum using 1-3, while no film formed using 4. All films contained considerable carbon (C/B = 0.67-7) and were deficient in phosphorus (P/B = 0-0.5) according to Auger electron spectroscopy. For 3, silicon was incorporated in the films (Si/B = 0.9-2). The preferential loss of phosphorus was nearly complete at higher pyrolysis temperatures that favor formation of carbon-rich films. Volatile products of the decompositions were observed by in situ mass spectroscopy and by H-1 nuclear magnetic resonance analysis of the condensate in a liquid nitrogen cooled trap. The products indicate that beta-hydrogen elimination of alkene from boron is a preferred reaction pathway, while concerted elimination reactions appear to be inefficient. Although these phosphinoborane compounds do not appear to be suitable precursors for pure boron phosphide, the B-P-C films obtained are chemically inert and may be of interest as protective coatings. C1 USN,CTR AIR WARFARE,DIV WEAP,DEPT RES,DIV CHEM,CHINA LAKE,CA 93555. NR 13 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0022-328X J9 J ORGANOMET CHEM JI J. Organomet. Chem. PD OCT 18 PY 1994 VL 480 IS 1-2 BP 11 EP 14 DI 10.1016/0022-328X(94)87096-9 PG 4 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA PK526 UT WOS:A1994PK52600002 ER PT J AU XIE, H WANG, WI MEYER, JR RAMMOHAN, LR AF XIE, H WANG, WI MEYER, JR RAMMOHAN, LR TI NORMAL INCIDENCE SECOND-HARMONIC GENERATION IN L-VALLEY ALSB/GASB/GA1-XALXSB/ALSB STEPPED QUANTUM-WELLS SO APPLIED PHYSICS LETTERS LA English DT Article ID 2ND-HARMONIC GENERATION; 2ND-ORDER SUSCEPTIBILITY; INTERSUBBAND TRANSITIONS; OPTICAL RECTIFICATION; SUPERLATTICES; BAND; ABSORPTION AB A novel mechanism is proposed for surface-emitting second-harmonic generation at normal incidence using L-valley intersubband transitions in AlSb/GaSb/Ga1-xAlxSb/AlSb stepped quantum wells. The calculations indicate that second-harmonic susceptibilities of at least 9 x 10(-8) m/V should be achievable under double resonance conditions, which is comparable to the best obtainable in GaAs/Ga1-xAlxAs systems for realistic propagation angles (e.g., 45-degrees). Besides the advantage of normal-incidence geometry, the large L-valley conduction band offset between GaSb and AlSb enables doubling to frequencies spanning the entire midwave infrared spectral region. (C) 1994 American Institute of Physics. C1 USN,RES LAB,WASHINGTON,DC 20375. WORCESTER POLYTECH INST,DEPT PHYS ELECT & COMP ENGN,WORCESTER,MA 01609. RP XIE, H (reprint author), COLUMBIA UNIV,DEPT ELECT ENGN,NEW YORK,NY 10027, USA. RI Ram-Mohan, Ramdas/C-5167-2012 NR 30 TC 22 Z9 22 U1 0 U2 5 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 OCT 17 PY 1994 VL 65 IS 16 BP 2048 EP 2050 DI 10.1063/1.112789 PG 3 WC Physics, Applied SC Physics GA PM429 UT WOS:A1994PM42900023 ER PT J AU MELINGER, JS GANDHI, SR HARIHARAN, A GOSWAMI, D WARREN, WS AF MELINGER, JS GANDHI, SR HARIHARAN, A GOSWAMI, D WARREN, WS TI ADIABATIC POPULATION TRANSFER WITH FREQUENCY-SWEPT LASER-PULSES SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SELECTIVE VIBRATIONAL EXCITATIONS; INITIATED HALF-REACTION; RAPID-PASSAGE; RABI OSCILLATIONS; MODEL SIMULATIONS; ANALYTICAL SHAPES; REACTANT PAIR; INVERSION; MOLECULES; STATE AB We present detailed experimental and theoretical results on population transfer with frequency-swept picosecond laser pulses. Here, we demonstrate that intense frequency-swept pulses, when applied in the adiabatic limit, lead to both more efficient and more selective excitation than do unmodulated laser pulses. The experimental work is performed on quasi-two-level systems (pentacene/p-terphenyl crystal and Na vapor), quasi-three-level systems (Na vapor), and on more complex multilevel systems (I-2 vapor). We discuss the different characteristics of adiabatic population transfer in both few-level, and multilevel cases, and, in particular, present computer calculations to explore the effects of molecular rotations in multilevel adiabatic population transfer. C1 PRINCETON UNIV,DEPT CHEM,PRINCETON,NJ 08544. PRINCETON UNIV,PRINCETON CTR PHOTON & OPTO ELECTR MAT,PRINCETON,NJ 08544. RP MELINGER, JS (reprint author), USN,RES LAB,CODE 6613,WASHINGTON,DC 20375, USA. RI Goswami, Debabrata/A-9347-2009 OI Goswami, Debabrata/0000-0002-2052-0594 NR 64 TC 154 Z9 155 U1 1 U2 16 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 OCT 15 PY 1994 VL 101 IS 8 BP 6439 EP 6454 DI 10.1063/1.468368 PG 16 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PL716 UT WOS:A1994PL71600007 ER PT J AU MORRILL, JS BENESCH, WM AF MORRILL, JS BENESCH, WM TI ROLE OF N-2(A' (5)SIGMA(G)(+)) IN THE ENHANCEMENT OF N2B3-PI(G)(V=10) POPULATIONS IN THE AFTERGLOW SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID HERMAN INFRARED SYSTEM; ENERGY-POOLING REACTIONS; EINSTEIN COEFFICIENTS; MOLECULAR NITROGEN; N2; STATE; TRANSITION; BANDS; EXCITATION; OXYGEN AB Time-resolved spectroscopic observations of the N-2 1PG afterglow, b(3)II(g)-->A (3) Sigma(u)(+), following a pulsed discharge show both an enhancement in the overall intensity and significant changes the shape of bands which arise from the v = 10 level of the B (IIg)-I-3. Model results indicated that these changes in shape are produced by an enhancement of the population of the low J levels Omega=2 component of the v = 10 level. In addition, we also observed bands of the Herman Infrared system of N-2 (HIR), C'' (IIu)-I-5-->A' (5) Sigma(g)(+), specifically the (3,1) and (2,0) bands. During the afterglow, both the 1PG and HIR are being produced by energy pooling processes. The time-dependent increase of the 1PG v'= 10 band intensities show a strong correlation with the variation in the HIR band intensities which predominately populate the lower levels of the A' (5) Sigma(g)(+). Recent work has shown the A' (5) Sigma(g)(+) to have a significantly deeper potential well than previously thought so that it is now thought to cross the B (IIg)-I-3. Based on our measurements and a simple model of the afterglow we have estimated the apparent rate coefficient for collisional transfer between A' (5) Sigma(g)(+) and the high v levels of the B (IIg)-I-3 due to collisions with the N-2 ground state. The value for collisional transfer from A' to B is approximately 1.0X10(-11) cc/molecule s. Our observations indicate the A' (5) Sigma(g)(+) may have an even deeper potential and we estimate an upper bound for v = 0 to be similar to 3590+/-32 cm(-1) below the dissociation limit which is similar to 500+/-32 cm(-1) deeper than the recent theoretical estimate. C1 UNIV MARYLAND,INST PHYS SCI & TECHNOL,COLLEGE PK,MD 20742. RP MORRILL, JS (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 53 TC 21 Z9 22 U1 1 U2 2 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 OCT 15 PY 1994 VL 101 IS 8 BP 6529 EP 6537 DI 10.1063/1.468347 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PL716 UT WOS:A1994PL71600016 ER PT J AU BLAIR, PJ BULTMAN, SJ HAAS, JC ROUSE, BT WILKINSON, JE GODFREY, VL AF BLAIR, PJ BULTMAN, SJ HAAS, JC ROUSE, BT WILKINSON, JE GODFREY, VL TI CD4(+)CD8(-) T-CELLS ARE THE EFFECTOR-CELLS IN DISEASE PATHOGENESIS IN THE SCURFY (SF) MOUSE SO JOURNAL OF IMMUNOLOGY LA English DT Article ID EXPERIMENTAL ALLERGIC ENCEPHALOMYELITIS; LYMPHORETICULAR DISEASE; MONOCLONAL-ANTIBODIES; LYMPHOKINE ACTIVITIES; POSITIVE SELECTION; LYMPHOCYTES-T; B-CELLS; ANTIGEN; MICE; HELPER AB hemizygous for the X-linked mutation, scurfy (sf), exhibit a fatal lymphoreticular disease that is mediated by T lymphocytes. To evaluate the respective roles of CD4 or CD8 single positive T cells in scurfy disease, neonates were treated with mAbs directed against the CD4 or CD8 molecules. Whereas mice treated with an anti-CD8 Ab developed lesions and succumbed to disease at the same time (17 days) as their untreated scurfy littermates, mice treated with an anti-CD4 Ab lived up to 11 wk before developing scurfy disease. To insure a more complete elimination of the T cell subsets, the scurfy mutation was bred onto beta(2)-microglobulin (beta(2)m)-deficient (CD8-less) and CD4-deficient transgenic mouse lines. Whereas there was little moderation of disease in beta(2)m-deficient scurfy mice, CD4-deficient scurfy mice had markedly decreased scurfy lesions and a prolonged life span, similar to that of anti-CD4-treated sf/Y mice. Additionally, scurfy disease was transplanted into H-2-compatible nude mice through the adoptive transfer of CD4(+)CD8(-) T cells, but not CD4(-)CD8(+) T cells. Flow-cytometric analysis revealed that sf/Y mice have an increased percentage of activated CD4(+) T cells in their lymph nodes. In addition, there is an increase in the in vitro production of cytokines in the cultured splenocytes of CD8-less, but not CD4-less, scurfy mice. These data suggest that CD4(+) T cells are critical mediators of disease in the scurfy mouse. C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. USN,MED RES INST,IMMUNE CELL BIOL PROGRAM,BETHESDA,MD 20889. UNIV TENNESSEE,DEPT MICROBIOL,KNOXVILLE,TN 37901. UNIV TENNESSEE,COLL VET MED,KNOXVILLE,TN 37901. FU PHS HHS [A132153] NR 47 TC 120 Z9 124 U1 1 U2 4 PU AMER ASSOC IMMUNOLOGISTS PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0022-1767 J9 J IMMUNOL JI J. Immunol. PD OCT 15 PY 1994 VL 153 IS 8 BP 3764 EP 3774 PG 11 WC Immunology SC Immunology GA PM581 UT WOS:A1994PM58100044 PM 7930593 ER PT J AU HARVEY, DP TERRELL, JB SUDARSHAN, TS AF HARVEY, DP TERRELL, JB SUDARSHAN, TS TI HYDROGEN EFFECTS ON THE DUCTILE TO BRITTLE TRANSITION BEHAVIOR OF 21-6-9-STAINLESS-STEEL SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID ASSISTED CRACKING; FRACTURE; EMBRITTLEMENT; NICKEL; IRON AB Charpy V-notched impact test studies on 21-6-9 austenitic stainless steel at 293 and 77 K demonstrated that hydrogen charging promoted the formation of larger microvoids at 293 K, promoted the formation of facets at 77 K, and reduced the energy absorbed by the material at both temperatures. These observations suggest that the role of hydrogen in the impact behaviour of this material is to enhance whatever crack-growth mechanism is operating at a given temperature. Further, the observation that embrittlement exists even at liquid nitrogen temperatures indicates that little or no localized rearrangement of hydrogen during the test is required or that relatively high strain-rate effects on hydrogen embrittlement need not be necessarily attributed to enhanced transport of hydrogen atmospheres by mobile dislocations. The data presented in this paper are consistent with a model in which the mechanism of hydrogen embrittlement is affected by the extent of plastic deformation. C1 REYNOLDS MET CO,RICHMOND,VA 23221. MAT MODIFICAT INC,FAIRFAX,VA 22031. RP HARVEY, DP (reprint author), USN,RES LAB,MECH MAT BRANCH,WASHINGTON,DC 20375, USA. NR 31 TC 4 Z9 6 U1 0 U2 5 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 OCT 15 PY 1994 VL 29 IS 20 BP 5485 EP 5490 DI 10.1007/BF01171566 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA PP298 UT WOS:A1994PP29800035 ER PT J AU PRZYSTUPA, MA VASUDEVAN, AK ROLLETT, AD AF PRZYSTUPA, MA VASUDEVAN, AK ROLLETT, AD TI CRYSTALLOGRAPHIC TEXTURE GRADIENTS IN THE ALUMINUM-8090 MATRIX ALLOY AND 8090-PARTICULATE COMPOSITES SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article ID ROLLING TEXTURES; RECRYSTALLIZATION; MICROSTRUCTURE; DEFORMATION; CRYSTAL; SHEET AB Al-Li alloys develop sharp textures with a strong brass component after fabrication. In the case of thick sheet and plate extrusions through thickness texture gradients are also commonly observed. These textures are different from those that develop in conventional aluminum alloys and their origin has not yet been completely understood. In the present work the sources of texture gradients in the 8090 alloy and 8090 based particulate composites, both formed as thick plate extrusions, have been studied. Results showed that strain gradients, and redundant shears in particular, are responsible for the development of textures in the 8090 alloys. In the SiC reinforced particulate composites, the presence of reinforcement resulted in the development of significantly weaker deformation textures without dominant brass component within the plate and a mixture of recrystallization and surface shear type textures at the surface. The development of textures in the composites has been attributed to the absence of redundant shears in the bulk and to a surface deformation gradient introduced by the presence of SiC particles. C1 OFF NAVAL RES,ARLINGTON,VA 22217. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP PRZYSTUPA, MA (reprint author), UNIV CALIF LOS ANGELES,DEPT MAT SCI & ENGN,LOS ANGELES,CA 90024, USA. RI Rollett, Anthony/A-4096-2012 OI Rollett, Anthony/0000-0003-4445-2191 NR 30 TC 10 Z9 10 U1 0 U2 3 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 OCT 15 PY 1994 VL 186 IS 1-2 BP 35 EP 44 DI 10.1016/0921-5093(94)90303-4 PG 10 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA PG003 UT WOS:A1994PG00300004 ER PT J AU KIM, YD COOPER, SL KLEIN, MV PARK, JH JONKER, BT AF KIM, YD COOPER, SL KLEIN, MV PARK, JH JONKER, BT TI SPECTROSCOPIC ELLIPSOMETRY STUDY OF ZN1-XCOXSE ALLOYS GROWN ON GAAS SO PHYSICAL REVIEW B LA English DT Article ID TRANSITION-METAL COMPOUNDS; ELECTRONIC-STRUCTURE; OPTICAL-PROPERTIES; BAND-GAP; ZNSE; SEMICONDUCTORS; SPECTRA; STRAIN; PHOTOEMISSION; LUMINESCENCE AB We present an ellipsometric study of Zn1-xCoxSe films with 0 less than or equal to x < 0.1 grown on GaAs substrates. We attribute the significant distortions of the interference patterns at energies between 1.6 and 1.8 eV to absorption due to localized d-state transitions between the crystal-field levels of Co2+ ions on Zn sites. There is also evidence of an absorption feature near 4.3 eV within the E(0)+Delta(0)-E(1) band-gap region. We propose that this structure has the characteristics of a charge-transfer-type p-to-d transition. A similar absorption band also seems to be present in Zn1-xFexSe system. C1 UNIV ILLINOIS,MAT RES LAB,CHAMPAIGN,IL 61801. KYUNG HEE UNIV,DEPT PHYS,SEOUL 130701,SOUTH KOREA. AT&T BELL LABS,MURRAY HILL,NJ 07974. USN,RES LAB,WASHINGTON,DC 20375. RP KIM, YD (reprint author), UNIV ILLINOIS,DEPT PHYS,CHAMPAIGN,IL 61801, USA. NR 46 TC 5 Z9 6 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 OCT 15 PY 1994 VL 50 IS 15 BP 10637 EP 10643 DI 10.1103/PhysRevB.50.10637 PG 7 WC Physics, Condensed Matter SC Physics GA PP124 UT WOS:A1994PP12400022 ER PT J AU SINGH, DJ PICKETT, WE AF SINGH, DJ PICKETT, WE TI SKUTTERUDITE ANTIMONIDES - QUASI-LINEAR BANDS AND UNUSUAL TRANSPORT SO PHYSICAL REVIEW B LA English DT Note AB Electronic-structure calculations are reported for IrSb3, CoSb3, and CoAs3 in the skutterudite structure. The band structures show a pseudogap around the Fermi level. The single band, which crosses the pseudogap, touches the conduction-band minimum at the Gamma point in CoAs3 and IrSb3 and almost touches it in CoSb3 due to a different ordering of the conduction bands. The dispersion of this gap-crossing band is quadratic at the Gamma point as expected, but for the antimonides it remarkably crosses over to linear behavior extremely close to the band edge, so that for doping levels as low as 3X10(16) holes/cm(3) the properties are determined by the linear dispersion. This yields interesting transport effects, such as a completely off-diagonal inverse mass tensor and unusual doping dependencies of the hole mobility and Seebeck coefficient. The Seebeck coefficients calculated from the band dispersion are in excellent agreement with experiment. RP SINGH, DJ (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. RI Singh, David/I-2416-2012 NR 12 TC 224 Z9 228 U1 5 U2 37 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 OCT 15 PY 1994 VL 50 IS 15 BP 11235 EP 11238 DI 10.1103/PhysRevB.50.11235 PG 4 WC Physics, Condensed Matter SC Physics GA PP124 UT WOS:A1994PP12400108 ER PT J AU STREITZ, FH MINTMIRE, JW AF STREITZ, FH MINTMIRE, JW TI ELECTROSTATIC POTENTIALS FOR METAL-OXIDE SURFACES AND INTERFACES SO PHYSICAL REVIEW B LA English DT Article ID EMBEDDED-ATOM-METHOD; MOLECULAR-DYNAMICS SIMULATIONS; ELECTRONEGATIVITY EQUALIZATION; ENERGY CURVES; FCC METALS; ALPHA-AL2O3; CORUNDUM; MODEL; DENSITY; SILICON RP STREITZ, FH (reprint author), USN,RES LAB,CODE 6179,WASHINGTON,DC 20375, USA. OI Mintmire, John/0000-0002-6551-0349 NR 56 TC 243 Z9 245 U1 7 U2 50 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 OCT 15 PY 1994 VL 50 IS 16 BP 11996 EP 12003 DI 10.1103/PhysRevB.50.11996 PG 8 WC Physics, Condensed Matter SC Physics GA PR434 UT WOS:A1994PR43400081 ER PT J AU MAGNO, R SPENCER, MG AF MAGNO, R SPENCER, MG TI ASSOCIATION OF A ZERO-BIAS ANOMALY IN ELECTRON-TUNNELING IN ALXGA1-XAS WITH THE DX DEFECT SO PHYSICAL REVIEW B LA English DT Note ID SI-DOPED ALXGA1-XAS; PERSISTENT PHOTOCONDUCTIVITY; CENTERS; GAAS; PHOTOIONIZATION; TE C1 HOWARD UNIV,DEPT ELECT ENGN,WASHINGTON,DC 20059. RP MAGNO, R (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 23 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 OCT 15 PY 1994 VL 50 IS 16 BP 12238 EP 12241 DI 10.1103/PhysRevB.50.12238 PG 4 WC Physics, Condensed Matter SC Physics GA PR434 UT WOS:A1994PR43400120 ER PT J AU FRIEBELE, EJ ASKINS, CG PUTNAM, MA FOSHA, AA FLORIO, J DONTI, RP BLOSSER, RG AF FRIEBELE, EJ ASKINS, CG PUTNAM, MA FOSHA, AA FLORIO, J DONTI, RP BLOSSER, RG TI DISTRIBUTED STRAIN SENSING WITH FIBER BRAGG GRATING ARRAYS EMBEDDED IN CRTM(TM) COMPOSITES SO ELECTRONICS LETTERS LA English DT Article DE STRAIN MEASUREMENT; FIBER OPTIC SENSORS AB Fibre Bragg grating (FBG) sensor arrays fabricated during optical fibre drawing have been embedded in Fibre-resin composite panels made by the continuous resin transfer molding(TM) (CRTM(TM)) process to accurately measure distributed strain. C1 BP CHEM INC,AUBURN,WA 98002. RP FRIEBELE, EJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 4 TC 31 Z9 35 U1 1 U2 5 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 OCT 13 PY 1994 VL 30 IS 21 BP 1783 EP 1784 DI 10.1049/el:19941180 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA PP973 UT WOS:A1994PP97300043 ER PT J AU CALLAHAN, JH MCELVANY, SW ROSS, MM AF CALLAHAN, JH MCELVANY, SW ROSS, MM TI TANDEM MASS-SPECTROMETRY STUDIES OF OXYGEN INTERACTIONS WITH FULLERENES AND METALLOFULLERENES SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES LA English DT Article DE FULLERENES; METALLOFULLERENES; OXYGEN INTERACTIONS; TANDEM MASS SPECTROMETRY ID HIGH-ENERGY COLLISIONS; CARBON NANOTUBES; C60; BUCKMINSTERFULLERENE; CATIONS; C-60; GAS; FRAGMENTATION; COMPLEXES; CLUSTERS AB The reaction products of oxygen with fullerenes and metallofullerenes have been characterized by thermal desorption mass spectrometry and low energy collisional activation on a triple quadrupole mass spectrometer. C60O, which is present in fullerene soot, fragments primarily with the loss of O, although CO loss can be observed at higher collision energies. Fragmentation of C60On- adducts, formed by reactions with oxygen in the chemical ionization source or by reactive collisions with O-2 in the collision cell, is characterized by CO loss at relatively low energies, followed by CO2 loss and loss of 2CO. The results indicate that O-2 must interact as the intact diatomic species in order to initiate fragmentation of the fullerene cage, consistent with other reports in the literature. O-3 induced fragmentation occurs in a similar fashion, and the results may explain the first step in the recently reported formation of higher, odd-numbered fullerenes (e.g. C-119) in ozonolysis. Studies with metallofullerenes indicate that the extractable metallofullerenes (LaC82, La2C80) are less reactive toward oxygen than their less extractable counterparts (LaC60, LaC70). The stability of LaC82 and La2C80 was demonstrated by the formation of He uptake products (e.g. He@LaC82) in high energy collisions with He in a hybrid (BEqQ) mass spectrometer. RP CALLAHAN, JH (reprint author), USN,RES LAB,DIV CHEM,CODE 6113,WASHINGTON,DC 20375, USA. NR 46 TC 16 Z9 16 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-1176 J9 INT J MASS SPECTROM JI Int. J. Mass Spectrom. Ion Process. PD OCT 13 PY 1994 VL 138 BP 221 EP 239 DI 10.1016/0168-1176(94)04039-7 PG 19 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA PW201 UT WOS:A1994PW20100017 ER PT J AU PARENT, DC AF PARENT, DC TI PROBING THE UNUSUAL KINETIC-BEHAVIOR OF SI2C2+ REACTIONS WITH UNSATURATED AND AROMATIC-COMPOUNDS SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES LA English DT Article DE FT-ICR; INTERNAL ENERGY; ION-MOLECULE REACTIONS; ISOMERS; KINETICS; SI2C2+ ID ION-MOLECULE REACTIONS; VIBRATIONAL-ENERGY TRANSFER; GAS-PHASE REACTIONS; IONIZATION-POTENTIALS; CLUSTER IONS; ACETYLENE; HYDROCARBONS; CHEMISTRY; SI+(2P); FREQUENCIES AB The unusual non-first-order kinetic behavior of Si2C2+ ions produced by direct laser vaporization in a Fourier transform ion cyclotron resonance mass spectrometer was probed using a variety of experimental techniques to specify the energy content of these ions. The ions apparently are formed with at least 0.8 eV of excess energy in an excited electronic state, possibly as isomers of the ground state. Reactions with a variety of substituted benzenes and unsaturated hydrocarbons were also investigated. The results of the substituted benzene reactions display a number of similarities to the reactions of Si+ with benezene or NO2, proceeding through adduct formation for the former and producing silicon oxides in the latter. Carbon-13 labeling of Si2C2+ in the reactions with 2- and 3-carbon unsaturated neutrals reveals the detailed mechanism of these reactions. The C3H4 isomers (allene and propyne) both appear to react by insertion into single bonds, leading to different products in these two cases. This is in contrast to the reactions with ethylene and acetylene, where insertion into the multiple carbon-carbon bonds is important. C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NR 44 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-1176 J9 INT J MASS SPECTROM JI Int. J. Mass Spectrom. Ion Process. PD OCT 13 PY 1994 VL 138 BP 307 EP 324 DI 10.1016/0168-1176(94)04060-5 PG 18 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA PW201 UT WOS:A1994PW20100023 ER PT J AU MCELVANY, SW ROSS, MM BOHME, DK AF MCELVANY, SW ROSS, MM BOHME, DK TI FULLERENES, CARBON AND METAL-CARBON CLUSTERS - FOREWORD SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES LA English DT Editorial Material C1 YORK UNIV,DEPT CHEM,DOWNSVIEW,ON M3J 1P3,CANADA. RP MCELVANY, SW (reprint author), USN,RES LAB,DIV CHEM,CODE 6113,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-1176 J9 INT J MASS SPECTROM JI Int. J. Mass Spectrom. Ion Process. PD OCT 13 PY 1994 VL 138 BP R9 EP R9 DI 10.1016/0168-1176(94)80006-5 PG 1 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA PW201 UT WOS:A1994PW20100001 ER PT J AU SEDEGAH, M HEDSTROM, R HOBART, P HOFFMAN, SL AF SEDEGAH, M HEDSTROM, R HOBART, P HOFFMAN, SL TI PROTECTION AGAINST MALARIA BY IMMUNIZATION WITH PLASMID DNA ENCODING CIRCUMSPOROZOITE PROTEIN SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID SPOROZOITE SURFACE PROTEIN-2; T-CELL CLONES; PLASMODIUM-YOELII; IMMUNE-RESPONSES; GENE; MICE; INFLUENZA; VACCINES; HEPATOCYTES; INJECTION AB Immunization with irradiated sporozoites protects animals and humans against malaria, and the circumsporozoite protein is a target of this protective immunity. We now report that adjuvant-free intramuscular injection of mice with plasmid DNA encoding the Plasmodium yoelii circumsporozoite protein induced higher levels of antibodies and cytotoxic T lymphocytes against the P. yoelii circumsporozoite protein than did immunization with irradiated sporozoites. Mice immunized with this vaccine had an 86% reduction in liver-stage parasite burden after challenge with 5 x 10(5) sporozoites (>10(5) median infectious doses). Eighteen (68%) of 28 mice that received two or three doses of vaccine were protected against challenge with 10(2) sporozoites, and the protection was dependent on CD8(+) T cells. These studies demonstrate the utility of plasmid DNA immunization against a nonviral infection. By obviating the requirement for peptide synthesis, expression and purification of recombinant proteins, and adjuvants, this method of immunization provides an important alternative for rapid identification of protective B- and T-cell epitopes and for construction of vaccines to prevent malaria and other infectious diseases. C1 PAN AMER HLTH ORG,WASHINGTON,DC 20037. VICAL INC,SAN DIEGO,CA 92121. RP SEDEGAH, M (reprint author), USN,MED RES INST,MALARIA PROGRAM,BETHESDA,MD 20889, USA. NR 31 TC 405 Z9 417 U1 3 U2 18 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD OCT 11 PY 1994 VL 91 IS 21 BP 9866 EP 9870 DI 10.1073/pnas.91.21.9866 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PM138 UT WOS:A1994PM13800042 PM 7937907 ER PT J AU GRIFFIN, RD LEE, JN AF GRIFFIN, RD LEE, JN TI ACOUSTOOPTICAL WIDE-BAND CORRELATOR SYSTEM - DESIGN, IMPLEMENTATION, AND EVALUATION SO APPLIED OPTICS LA English DT Article DE WIDE-BAND CORRELATOR; MATCHED FILTER; CORRELATION RECEIVER; ACOUSTOOPTICS; DOPPLER PROCESSING; HIGH-PERFORMANCE COMPUTING AB We describe the design and development of an acousto-optical wideband correlator that we integrated into a digital signal-processing system testbed. We report its measured performance and compare it with various theoretical performance measures, one of which compares the optical system with an equivalent efficient digital correlator. The measured performance of the optical system was 20 to 70 times that of a VAX 6410 computer using a fast-Fourier-transform correlation algorithm and a vector processor, even though the electronic interface system limited the performance of the optical system to less than 0.5% of its potential. We also compare the system with commercially available digital signal-processing boards. RP GRIFFIN, RD (reprint author), USN, RES LAB, DIV OPT SCI, CODE 5623, WASHINGTON, DC 20375 USA. NR 19 TC 0 Z9 0 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD OCT 10 PY 1994 VL 33 IS 29 BP 6774 EP 6787 PG 14 WC Optics SC Optics GA PL226 UT WOS:A1994PL22600007 PM 20941222 ER PT J AU WEI, A KOSIER, SL SCHRIMPF, RD FLEETWOOD, DM COMBS, WE AF WEI, A KOSIER, SL SCHRIMPF, RD FLEETWOOD, DM COMBS, WE TI DOSE-RATE EFFECTS ON RADIATION-INDUCED BIPOLAR JUNCTION TRANSISTOR GAIN DEGRADATION SO APPLIED PHYSICS LETTERS LA English DT Article ID OXIDE CHARGE; HARDNESS ASSURANCE; ENVIRONMENTS; INTERFACE; MODEL AB Analysis of radiation damage in modern NPN bipolar transistors at various dose rates is performed with a recently introduced charge separation method and PISCES simulations. The charge separation method is verified with measurements on metal-oxide-semiconductor capacitors. Gain degradation is more pronounced at lower dose rates. The charge separation technique reveals that depletion-region spreading and effective recombination velocity are both greater for devices irradiated at lower dose rates. (C) 1994 American Institute of Physics. C1 UNIV ARIZONA,DEPT ELECT & COMP ENGN,TUCSON,AZ 85721. USN,CTR NAVAL SURFACE WARFARE,CRANE,IN 47522. RP WEI, A (reprint author), MIT,DEPT ELECT ENGN & COMP SCI,CAMBRIDGE,MA 02139, USA. RI Schrimpf, Ronald/L-5549-2013 OI Schrimpf, Ronald/0000-0001-7419-2701 NR 23 TC 32 Z9 35 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 OCT 10 PY 1994 VL 65 IS 15 BP 1918 EP 1920 DI 10.1063/1.112816 PG 3 WC Physics, Applied SC Physics GA PM784 UT WOS:A1994PM78400020 ER PT J AU SAMIMI, J KINZER, RL AF SAMIMI, J KINZER, RL TI GAMMA-RAY OBSERVATIONS IN THE GALACTIC-CENTER REGION WITH AN IMAGING DETECTOR SO ASTROPHYSICAL JOURNAL LA English DT Article DE BALLOONS; DIFFUSE RADIATION; GALAXY, CENTER; GAMMA RAYS, OBSERVATIONS; INSTRUMENTATION, DETECTORS ID CENTER MOLECULAR CLOUDS; COS-B; GX 1+4; RADIATION; EMISSION; PLANE; SATELLITE AB Results of a series of experiments to detect gamma-ray emission greater than 10 MeV from the Galactic plane near the Galactic center are reported. Three low-background observations of the Galactic center region were made from high-altitude balloon platforms at similar to 12 GV geomagnetic cutoff rigidities in 1971 and 1975. A 3 degrees wide band of emission along the plane was detected near the center which shows clustering on the 1 degrees scale of the instrument's resolution. A significant part of this narrow band of emission is either from a concentrated region of diffuse emission between 350 degrees and 0 degrees Galactic longitude or from up to five discrete sources. Support for this discrete source interpretation comes from the fact that five of the seven most significant event concentrations correlate in position with live of the seven previously detected hard X-ray and higher energy gamma-ray sources in the Galactic center region. C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RP SAMIMI, J (reprint author), INT CTR THEORET PHYS,POB 586,TRIESTE,ITALY. NR 43 TC 1 Z9 1 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 OCT 10 PY 1994 VL 434 IS 1 BP 136 EP 144 DI 10.1086/174711 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PK764 UT WOS:A1994PK76400013 ER PT J AU MATZ, SM ULMER, MP GRABELSKY, DA PURCELL, WR GROVE, JE JOHNSON, WN KINZER, RL KURFESS, JD STRICKMAN, MS JUNG, GV AF MATZ, SM ULMER, MP GRABELSKY, DA PURCELL, WR GROVE, JE JOHNSON, WN KINZER, RL KURFESS, JD STRICKMAN, MS JUNG, GV TI THE PULSED HARD X-RAY-SPECTRUM OF PSR B1509-58 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GAMMA RAYS, OBSERVATIONS; PULSARS, INDIVIDUAL (PSR B1509 - 58); X-RAYS, STARS ID G320.4-1.2 AB OSSE observed the 150 ms X-ray pulsar PSR B1509-58 in the supernova remnant MSH 15-52 for 4 weeks in 1992. The pulsed spectrum from 50 keV to 5 MeV is well represented by a single power-law photon spectrum of the form (3.14 +/- 0.16) x 10(-6) x (E/118.5 keV)(-1.68+/-0.09) photons cm(-2) s(-1) keV(-1). This is significantly harder than the Crab pulsar spectrum in this energy range. The Ginga soft X-ray spectrum (2-60 keV) reported by Kawai et al. is significantly harder than the observed OSSE spectrum and predicts a flux 2 times higher than we observe in the similar to 55-170 keV energy band. This requires a break to a steeper spectrum somewhere in the intermediate energy range (similar to 20-80 keV). The spectrum must soften again at higher energies or the pulsar would have easily been detected by EGRET, COS B, and SAS 2. C1 NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208. UNIV SPACE RES ASSOC,WASHINGTON,DC. RP MATZ, SM (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 7650,WASHINGTON,DC 20375, USA. RI Johnson, Neil/G-3309-2014 NR 22 TC 34 Z9 34 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 OCT 10 PY 1994 VL 434 IS 1 BP 288 EP 291 DI 10.1086/174727 PN 1 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PK764 UT WOS:A1994PK76400029 ER PT J AU FELDMAN, U LAMING, JM AF FELDMAN, U LAMING, JM TI ON THE ABSENCE OF A RELATIONSHIP BETWEEN THE PROPERTIES OF THE T-E-GREATER-THAN-OR-EQUAL-TO-10(6) K AND THE PROPERTIES OF THE T-E-LESS-THAN-OR-EQUAL-TO-7X10(5) SOLAR PLASMAS SO ASTROPHYSICAL JOURNAL LA English DT Article DE PLASMAS; SUN, CHROMOSPHERE; SUN, CORONA ID UNRESOLVED FINE-STRUCTURES; TEMPERATURE REGION; CORONA; ATMOSPHERE; MASS AB Traditional solar upper atmosphere models assume continuity along solar upper atmosphere structures, from the T-e greater than or equal to 10(6) K corona to the T-e approximate to 10(4) K chromosphere. Under such conditions a transition region with 3 x 10(4) less than or equal to T-e less than or equal to 1 x 10(6) K should exist between the corona and chromosphere. According to such models, plasma properties of the corona could be inferred from plasma properties of the so-called transition region. Inherent in such models are assumptions that plasmas in such structures (most likely loops) are in hydrostatic equilibrium, and heat is distributed along them by thermal conduction. When accounting for coronal heat losses based on such models three mechanisms are mentioned: (1) radiation by coronal plasma; (2) thermal conductivity between the 10(6) K corona and the 10(4) K chromosphere and (3) mass motions, mostly into the solar wind. According to these models, thermal conductivity is the most efficient among the coronal heat loss mechanisms. In this paper, we describe studies of the relationships between structures having temperatures of T-e greater than or equal to 1 x 10(6) and those with temperatures of T-e < 7 x 10(5) K. We show that effects of thermal conduction between the hot and the cold regions are not seen at the expected levels, impying that unimpaired continuity is not being maintained between the 10(6) and 10(4) K plasma regions. As a consequence of these findings, we stress that no conclusion on the properties of T-e greater than or equal to 1 x 10(6) K plasmas can be drawn from properties of the so-called transition region (3 x 10(4) less than or equal to T-e less than or equal to 7 x 10(5) K) plasmas. C1 SFA INC,LANDOVER,MD 20785. RP FELDMAN, U (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 17 TC 49 Z9 50 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 OCT 10 PY 1994 VL 434 IS 1 BP 370 EP 377 DI 10.1086/174735 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PK764 UT WOS:A1994PK76400037 ER PT J AU RAJAGOPAL, AK AF RAJAGOPAL, AK TI A TIME-DEPENDENT FUNCTIONAL THEORY FOR THE ELECTRON-ION SYSTEM SO PHYSICS LETTERS A LA English DT Article AB It is shown that a time-dependent single particle potential upsilon(e) (rt) and a time-dependent force on the ion F(lkt) with a given fixed initial state of the combined electron-ion system, leading respectively to a given v-representable electronic density n(rt) and ionic displacement R(lkt), are determined so that a map (upsilon(e),F) --> (n,R) is invertible. This formulation allows us to address the effective self-consistent ion dynamics of the electron-ion system in contrast to existing treatments such as those based on the Car-Parrinello approach by replacing the fictitious Lagrangian introduced there by a precise action principle. Based on this, some schemes are derived to calculate the density, the displacement, etc. using the stationary action principle and some convenient choices of a suitably parametrised state vector. RP RAJAGOPAL, AK (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 10 TC 4 Z9 4 U1 0 U2 0 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 OCT 10 PY 1994 VL 193 IS 4 BP 363 EP 369 DI 10.1016/0375-9601(94)90966-0 PG 7 WC Physics, Multidisciplinary SC Physics GA PK827 UT WOS:A1994PK82700005 ER PT J AU JEONG, LS NICKLAUS, MC GEORGE, C MARQUEZ, VE AF JEONG, LS NICKLAUS, MC GEORGE, C MARQUEZ, VE TI UNANTICIPATED RETENTION OF CONFIGURATION IN THE DAST FLUORINATION OF DEOXY-4'-THIOPYRIMIDINE NUCLEOSIDES WITH UP HYDROXYL-GROUPS SO TETRAHEDRON LETTERS LA English DT Article ID ANALOGS; HIV AB Fluorination of 1-(5-O-trityl-3-deoxy-4-thio-beta-D-threo-pentofuranosyl)uracil (17) and 1-(5-O-trityl-2-deoxy-4-thio-beta-D-threo-pentofuranosyl)uracil (20) with DAST proceeded with exclusive retention of configuration. The structures of the products were confirmed by X-ray analysis. C1 NCI,DIV CANC TREATMENT,DEV THERAPEUT PROGRAM,MED CHEM LAB,BETHESDA,MD 20892. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. RI Nicklaus, Marc/N-4183-2014 NR 14 TC 34 Z9 34 U1 1 U2 7 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 OCT 10 PY 1994 VL 35 IS 41 BP 7569 EP 7572 DI 10.1016/S0040-4039(00)78345-6 PG 4 WC Chemistry, Organic SC Chemistry GA PL496 UT WOS:A1994PL49600021 ER PT J AU JEONG, LS NICKLAUS, MC GEORGE, C MARQUEZ, VE AF JEONG, LS NICKLAUS, MC GEORGE, C MARQUEZ, VE TI FACILE FLUORINATION OF DEOXY-4'-THIOPYRIMIDINE NUCLEOSIDES WITH DOWN HYDROXYL-GROUPS - RETENTION OF CONFIGURATION AFTER FLUORIDE OPENING OF THE QUATERNIZED N-3-MEM ANHYDRONUCLEOSIDES SO TETRAHEDRON LETTERS LA English DT Article AB Attempted fluorination of 1-(5-O-trityl-3-deoxy-4-thio-beta-D-erythro-pentofuranosyl)-3-(2-methoxyethoxymethyl)uracil (12) and 1-(5-O-trityl-2-deoxy-4-thio-beta-D-erythro-pentofuranosyl)-3-(2-methoxyethoxymethyl) uracil (14) with diethylaminosulfur trifluoride (DAST) produced very reactive N-3-MEM-O-2,2- and N-3-MEM-O-2,3-anhydronucleoside intermediates (16) that reacted with KF to give the desired fluorinated nucleosides with retention of configuration. C1 NCI,DIV CANC TREATMENT,DEV THERAPEUT PROGRAM,MED CHEM LAB,BETHESDA,MD 20892. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. RI Nicklaus, Marc/N-4183-2014 NR 8 TC 21 Z9 21 U1 1 U2 5 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 OCT 10 PY 1994 VL 35 IS 41 BP 7573 EP 7576 DI 10.1016/S0040-4039(00)78346-8 PG 4 WC Chemistry, Organic SC Chemistry GA PL496 UT WOS:A1994PL49600022 ER PT J AU BARGER, WR MOWERY, RL WYATT, JR AF BARGER, WR MOWERY, RL WYATT, JR TI SEPARATION AND INDIRECT DETECTION BY CAPILLARY ZONE ELECTROPHORESIS OF PPB (W/W) LEVELS OF ALUMINUM IONS IN SOLUTIONS OF MULTIPLE CATIONS SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article; Proceedings Paper CT 6th International Symposium on High Performance Capillary Electrophoresis (HPCE 94) CY JAN 31-FEB 03, 1994 CL SAN DIEGO, CA ID INORGANIC METAL-CATIONS; INDIRECT UV DETECTION AB Solutions of multiple cations in aqueous solutions at concentrations as low as 200 ppb were analyzed by capillary zone electrophoresis. Aluminum ions were cleanly separated from Li+, K+, Ca2+, Cr3+, Zn2+, Cu2+, and other ions less than 6 min after injection of the solution on a 50 cm x 50 mu m I.D. uncoated fused-silica capillary column at 15 kV. Indirect detection at 204 nm was carried out using a pH 2.8 background electrolyte containing 5.2 mM ephedrine as a UV-absorbing co-ion and 4.7 mM alpha-hydroxyisobutyric acid as a complexing counter ion. Mobilities for Al3+ and 14 other complexed cations were determined for this electrolyte. RP BARGER, WR (reprint author), USN,RES LAB,DIV CHEM,CODE 6170,4555 OVERLOOK AVE SW,WASHINGTON,DC 20375, USA. NR 10 TC 19 Z9 19 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD OCT 7 PY 1994 VL 680 IS 2 BP 659 EP 665 DI 10.1016/0021-9673(94)85166-2 PG 7 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA PM250 UT WOS:A1994PM25000036 ER PT J AU STENGERSMITH, JD CHAFIN, AP NORRIS, WP AF STENGERSMITH, JD CHAFIN, AP NORRIS, WP TI SYNTHESIS AND INITIAL CHARACTERIZATION OF POLY[2-(N,N-DIMETHYLAMINO)-1,4-PHENYLENEVINYLENE] SO JOURNAL OF ORGANIC CHEMISTRY LA English DT Note RP STENGERSMITH, JD (reprint author), USN,CTR AIR WARFARE,RES DEPT,DIV WEAPONS,CODE C0235,CHINA LAKE,CA 93555, USA. NR 12 TC 5 Z9 5 U1 0 U2 0 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 OCT 7 PY 1994 VL 59 IS 20 BP 6107 EP 6109 DI 10.1021/jo00099a053 PG 3 WC Chemistry, Organic SC Chemistry GA PK513 UT WOS:A1994PK51300053 ER PT J AU BELL, JB SZYMCZAK, WG AF BELL, JB SZYMCZAK, WG TI PROJECTION METHOD FOR VISCOUS INCOMPRESSIBLE-FLOW ON QUADRILATERAL GRIDS SO AIAA JOURNAL LA English DT Article ID NAVIER-STOKES EQUATIONS AB This paper describes a second-order projection method for the incompressible Navier-Stokes equations on multiply connected domains with a logically rectangular quadrilateral grid. The method uses a second-order fractional step scheme in which one first solves diffusion-convection equations to determine intermediate velocities which are then projected onto the space of divergence-free vector fields. The spatial discretizations are accomplished by formally transforming the equations to a computational space with a uniform grid. The diffusion, pressure gradient, and divergence terms are discretized using standard finite difference approximations. The convection terms are discretized using a second-order Godunov method that provides a robust discretization of these terms at high Reynolds number. Numerical results are presented illustrating the performance of the method. C1 USN,CTR SURFACE WARFARE,INFORMAT SCI & SYST BRANCH,SILVER SPRING,MD 20903. RP BELL, JB (reprint author), LAWRENCE LIVERMORE NATL LAB,CTR COMPUTAT SCI & COMP,POB 808,LIVERMORE,CA 94550, USA. NR 20 TC 15 Z9 15 U1 1 U2 5 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 OCT PY 1994 VL 32 IS 10 BP 1961 EP 1969 DI 10.2514/3.12239 PG 9 WC Engineering, Aerospace SC Engineering GA PJ487 UT WOS:A1994PJ48700003 ER PT J AU UTHUPPAN, J AGGARWAL, SK GRINSTEIN, FF KAILASANATH, K AF UTHUPPAN, J AGGARWAL, SK GRINSTEIN, FF KAILASANATH, K TI PARTICLE DISPERSION IN A TRANSITIONAL AXISYMMETRICAL JET - A NUMERICAL-SIMULATION SO AIAA JOURNAL LA English DT Article ID FREE SHEAR-LAYER; MIXING LAYER; ROUND JET; FLOW; TURBULENT; PLANE AB Numerical simulations are used to study the dynamics and dispersion of particles in the near field of a high velocity transitional axisymmetric jet. A time-dependent finite-difference approach that employs a fourth-order, phase-accurate flux-corrected transport algorithm is used to simulate the flow. Extensive flow visualization and analysis based on numerical simulation are employed to analyze the influence of large-scale vortical structures on the particle dynamics and dispersion. The simulations provide evidence of the existence of three distinct dispersion mechanisms, namely, the vortex, centrifugal, and inertial mechanisms, and the prominent role of vortex merging in the dispersion process. Whereas small particles get caught in the vortical structures and large particles pass through them, the intermediate size particles ride over them and tend to be flung out of the shear layer. Quantified dispersion results also show the higher dispersion of intermediate size particles (Stokes number near unity), that has been reported by previous investigators for lower velocity jets. The effects of particle density, injection location, and injection velocity on dispersion have also been studied. The predictions are also compared with previous experimental and numerical results. C1 USN,RES LAB,CTR REACT FLOW & DYNAM SYST,COMPUTAT PHYS LAB,WASHINGTON,DC 20375. RP UTHUPPAN, J (reprint author), UNIV ILLINOIS,DEPT MECH ENGN,CHICAGO,IL 60680, USA. NR 24 TC 26 Z9 29 U1 0 U2 1 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 OCT PY 1994 VL 32 IS 10 BP 2004 EP 2014 PG 11 WC Engineering, Aerospace SC Engineering GA PJ487 UT WOS:A1994PJ48700009 ER PT J AU HUDDLE, JR AF HUDDLE, JR TI QUARK MASSES AND BINDING-ENERGY IN A PROTON SO AMERICAN JOURNAL OF PHYSICS LA English DT Letter RP HUDDLE, JR (reprint author), USN ACAD,DEPT PHYS,ANNAPOLIS,MD 21402, USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0002-9505 J9 AM J PHYS JI Am. J. Phys. PD OCT PY 1994 VL 62 IS 10 BP 871 EP 871 DI 10.1119/1.17762 PG 1 WC Education, Scientific Disciplines; Physics, Multidisciplinary SC Education & Educational Research; Physics GA PJ023 UT WOS:A1994PJ02300002 ER PT J AU STRICKMAN, D SMITH, CD CORCORAN, KD NGAMPOCHJANA, M WATCHARAPICHAT, P PHULSUKSOMBATI, D TANSKUL, P DASCH, GA KELLY, DJ AF STRICKMAN, D SMITH, CD CORCORAN, KD NGAMPOCHJANA, M WATCHARAPICHAT, P PHULSUKSOMBATI, D TANSKUL, P DASCH, GA KELLY, DJ TI PATHOLOGY OF RICKETTSIA-TSUTSUGAMUSHI INFECTION IN BANDICOTA-SAVILEI, A NATURAL HOST IN THAILAND SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID SCRUB TYPHUS AB Following rodent surveys in a rice-growing area of central Thailand where we found Bandicota savilei, B. indica, and Rattus rattus infected with Rickettsia tsutsugamushi, we performed a study of pathogenesis of R. tsutsugamushi in laboratory-reared B. savilei. Eight animals were injected with saline and 19 animals were injected with 4.0 x 10(6) mouse 50% lethal dose units of a strain of R. tsutsugamushi isolated from a human in central Thailand. Animals were evaluated at intervals for IgG and IgM antibodies to R. tsutsugamushi by an indirect immunoperoxidase assay, the presence of the pathogen in liver and spleen by murine inoculation, and the pathology of representative tissues by gross and microscopic examination. The infected animals began to show internal evidence of mild illness 7-14 days after inoculation, and exhibited no changes in behavior. Total white blood cell counts decreased on day seven (including lymphocytes and polymorphonuclear leukocytes), followed by an almost equal increase on day 14. Gross pathology noted at necropsy was limited to slight liver and spleen enlargement accompanied by low numbers of abscesses and fibrinous tags present in the abdominal cavity. In addition to the gross morphologic changes, histopathologic lesions noted were all mild, consisting of vasculitis of the lung, activation of the mononuclear phagocyte system, abdominal mesothelial cell hyperplasia, and peritonitis. Rickettsiae were isolated from liver and spleen on days 0, 7, and 14, but not thereafter. Specific antibody response was first observed on day 14, peaked on day 21, and it decreased to levels observed in uninfected animals between days 120 and 180. The course of infection in B. savilei was less prolonged and more pathologic than that reported in wild southeast Asian Rattus species. C1 USN,MED RES INST,VIRAL & RICKETTSIAL DIS PROGRAM,BETHESDA,MD. ARMED FORCES RES INST MED SCI,ROYAL THAI ARMY COMPONENT,DEPT VET MED,BANGKOK,THAILAND. ARMED FORCES RES INST MED SCI,USA MED COMPONENT,DEPT MED ENTOMOL,BANGKOK,THAILAND. ARMED FORCES RES INST MED SCI,USA MED COMPONENT,DEPT VET MED,BANGKOK,THAILAND. RP STRICKMAN, D (reprint author), WALTER REED ARMY MED CTR,WALTER REED ARMY INST RES,DEPT RICKETTSIOL DIS,WASHINGTON,DC 20307, USA. NR 18 TC 19 Z9 19 U1 0 U2 0 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 OCT PY 1994 VL 51 IS 4 BP 416 EP 423 PG 8 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA PN553 UT WOS:A1994PN55300008 PM 7943567 ER PT J AU POSS, M RACICOT, D KISER, WR AF POSS, M RACICOT, D KISER, WR TI ISOSORBIDE-5-MONONITRATE IN ANGINA-PECTORIS SO ANNALS OF INTERNAL MEDICINE LA English DT Letter RP POSS, M (reprint author), USN HOSP,JACKSONVILLE,FL 32214, USA. NR 2 TC 0 Z9 1 U1 0 U2 0 PU AMER COLL PHYSICIANS PI PHILADELPHIA PA INDEPENDENCE MALL WEST 6TH AND RACE ST, PHILADELPHIA, PA 19106-1572 SN 0003-4819 J9 ANN INTERN MED JI Ann. Intern. Med. PD OCT 1 PY 1994 VL 121 IS 7 BP 547 EP 547 PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA PJ102 UT WOS:A1994PJ10200014 PM 8093205 ER PT J AU LEE, YJ LO, CY AF LEE, YJ LO, CY TI OPTIMIZING AN AIR DEFENSE EVALUATION MODEL USING INDUCTIVE LEARNING SO APPLIED ARTIFICIAL INTELLIGENCE LA English DT Article ID RULE INDUCTION; STATISTICAL-DATA; EXPERT SYSTEMS AB We present an effective method that integrates inductive learning in simulation modeling to analyze ship air defense combat scenarios. By using induction in a simulation environment, we are able to discover rules in a ship air defense evaluation model about the optimal weapon assignments that we might not be aware of or could not express clearly. This approach can also perform sensitivity analysis in identifying variables that are critical for certain weapon operations. In addition, results obtained from inductive learning, as represented in the format of decision trees, are easy for a user to understand, maintain, and adopt for other use. RP LEE, YJ (reprint author), USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 17 TC 0 Z9 0 U1 0 U2 0 PU TAYLOR & FRANCIS PI BRISTOL PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598 SN 0883-9514 J9 APPL ARTIF INTELL JI Appl. Artif. Intell. PD OCT-DEC PY 1994 VL 8 IS 4 BP 645 EP 661 DI 10.1080/08839519408945463 PG 17 WC Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic SC Computer Science; Engineering GA PZ945 UT WOS:A1994PZ94500010 ER PT J AU NOVOTNY, JA LACAZE, DR MOORE, ML FORSBACKA, M AF NOVOTNY, JA LACAZE, DR MOORE, ML FORSBACKA, M TI PRODUCTION OF MILLICURIE QUANTITIES OF KR-85M IN AN ALUMINUM VESSEL IN A 1-MEGAWATT NUCLEAR-REACTOR SO APPLIED RADIATION AND ISOTOPES LA English DT Article AB This paper describes a method for producing millicurie quantities of 4.48-h Kr-85m by neutron irradiation of natural krypton in the core of a nuclear reactor. The target gas was contained in a half-liter aluminum vessel residing in the reactor core. Irradiation at 1 megawatt for 1 h at a pressure of 40 psig (206 cm Hg) yielded a total 70 mCi of Kr-85m in a volume of 1660 cm(3). C1 ARMED FORCES RADIOBIOL RES INST,BETHESDA,MD. RP NOVOTNY, JA (reprint author), USN,MED RES INST,BETHESDA,MD, USA. NR 15 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 0969-8043 J9 APPL RADIAT ISOTOPES JI Appl. Radiat. Isot. PD OCT PY 1994 VL 45 IS 10 BP 991 EP 996 DI 10.1016/0969-8043(94)90167-8 PG 6 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Chemistry; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA PP881 UT WOS:A1994PP88100003 ER PT J AU MEDNIEKS, MI EPSTEIN, PM HACHISU, R HAND, AR ESQUIRE, RG AF MEDNIEKS, MI EPSTEIN, PM HACHISU, R HAND, AR ESQUIRE, RG TI CYCLIC AMP-REACTIVE PROTEINS IN HUMAN SALIVA SO ARCHIVES OF ORAL BIOLOGY LA English DT Article DE CYCLIC AMP; PROTEIN KINASE; SECRETORY PROTEINS ID NUCLEOTIDE PHOSPHODIESTERASE; KINASE; ISOPROTERENOL; ACCUMULATION; ACTIVATION; BINDING; INVITRO; CELLS AB This study was conducted to compare cyclic AMP-reactive proteins (cARP), the secretory form of regulatory (R) subunits of cyclic AMP-dependent protein kinase (PKA), and cyclic nucleotide phosphodiesterase (PDE) activity in human whole saliva with that of parotid fluid. Additionally, experiments were done to determine whether secretory cARP is altered by environmental stimuli. Earlier work showed that R subunits are present in parotid fluid and in salivary glands of rats. No previous information is available about secretory PDE in saliva. Whole and parotid ductal saliva samples were collected by a non-invasive procedure from healthy volunteers. After photoaffinity labelling with [P-32]-8-N-3-cAMP, the R subunits were identified by autoradiography. Cyclic nucleotide PDE activity was measured as a function of the conversion of the cyclic nucleotide to the tritiated 5'-nucleotide. The results showed that R of the type II cAPK, RII (M(r) 50-54 kDa) and/or a slower-moving isoform (M(r) 54-56 kDa, RIIa) were present in all parotid saliva samples tested. Whole saliva was positive for RII in more than 95% of the samples tested (n = 62), but with 50-90% reduction in concentration compared to parotid fluid. Both female and male subjects exposed to controlled auditory (60-80 dB) stimuli responded by a two- to five-fold increase in photoaffinity labelling of cARP (salivary RII, RIIa and RIIfr). There was considerable individual variability, but in all cases the differences in the results were significant (p < 0.05, n = 20). Whole saliva showed measurable PDE activity in fresh or frozen samples, whereas no PDE activity was detected in parotid fluid. These findings indicate that, similar to rat parotid fluid, human salivary cARP are secretory proteins, but that the presence of RII, RIIa or their combination varies individually. In contrast, PDE is either not a secretory protein or is secreted from glands other than the parotid. As no PDE activity was found in the ductal fluid, cAMP is not hydrolysed in the secretory granule compartment, and cARP may serve as its carrier to the mouth. C1 UNIV CONNECTICUT,CTR HLTH,FARMINGTON,CT. USN,INST DENT RES,GREAT LAKES,IL. RP MEDNIEKS, MI (reprint author), UNIV ILLINOIS,COLL DENT,DEPT ORAL BIOL,MC 690,801 S PAULINA ST,CHICAGO,IL 60612, USA. FU NIDCR NIH HHS [DE08034] NR 28 TC 4 Z9 4 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0003-9969 J9 ARCH ORAL BIOL JI Arch. Oral Biol. PD OCT PY 1994 VL 39 IS 10 BP 869 EP 875 DI 10.1016/0003-9969(94)90018-3 PG 7 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA PQ168 UT WOS:A1994PQ16800007 PM 7741656 ER PT J AU RHEE, G BURNS, JO KOWALSKI, MP AF RHEE, G BURNS, JO KOWALSKI, MP TI X-RAY-EMISSION ASSOCIATED WITH RADIO GALAXIES IN THE PERSEUS CLUSTER SO ASTRONOMICAL JOURNAL LA English DT Article ID ABELL CLUSTERS; STAR FORMATION; LOW LUMINOSITY; VIRGO CLUSTER; VLA SURVEY; SPECTRUM; GAS; COMPILATION; ABUNDANCES; IMAGES AB In this paper, we report on new x-ray observations of the Perseus cluster made using four separate pointings of the ROSAT PSPC. We searched for x-ray emission associated with 16 radio galaxies and detected six above 3 sigma. We made use of the PSPC spectra to determine if the x ray emission associated with radio galaxies in Perseus is thermal or nonthermal in origin (i.e., hot gas or an AGN). For the head-tail radio galaxy IC 310, we find that the data are best fit by a power law model with an unusually large spectral index alpha=2.7. This is consistent with its unresolved spatial structure. On the other hand, a second resolved x-ray source associated with another radio galaxy 2.3 Mpc from the Perseus center (V Zw 331) is best fit by a thermal model. For three sources with insufficient flux for a full spectral analysis, we calculated hardness ratios. On this basis, the x-ray emission associated with the well known head-tail source NGC 1265 is consistent with thermal radiation. The x-ray spectra of UGC 2608 and UGC 2654 probably arise from hot gas, although very steep power-law spectra (alpha>3.2) are also possible. The spectrum of NGC 1275 is quite complex due to the presence of an AGN and the galaxy's location at the center of a cluster cooling flow. C1 UNIV NEVADA,DEPT PHYS,LAS VEGAS,NV 89154. USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RP RHEE, G (reprint author), NEW MEXICO STATE UNIV,DEPT ASTRON,LAS CRUCES,NM 88003, USA. NR 68 TC 17 Z9 17 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 OCT PY 1994 VL 108 IS 4 BP 1137 EP 1146 DI 10.1086/117142 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PJ505 UT WOS:A1994PJ50500001 ER PT J AU NISINI, B SMITH, HA FISCHER, J GEBALLE, TR AF NISINI, B SMITH, HA FISCHER, J GEBALLE, TR TI NGC-2024-IRS 2 - AN OUTBURST IN ITS NEAR-INFRARED LINE AND CONTINUUM EMISSION SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE STARS, INDIVIDUAL, NGC 2024 IRS 2; INFRARED, STARS; STARS, EARLY-TYPE; STARS, EMISSION-LINE; STARS, VARIABLE ID HIGH-RESOLUTION SPECTROSCOPY; NGC-2024; OBJECTS AB We present new near infrared spectroscopy, photometry, and narrow band imaging of the young stellar object NGC 2024 IRS 2. The data include high and low resolution spectra of Br gamma, Br alpha, and Pf gamma, single channel, JHKL' photometry, and images in Br gamma and nearby continuum. The source has had a burst in its infrared emission, typically increasing by one magnitude in continuum brightness and by factors of 4-8 in line intensity, since 1989, and apparently reached a maximum in 1991. A large velocity shift has occurred in the peaks of the hydrogen lines, from similar to +40 km s(-1) LSR in 1984 to similar to -25 km s(-1) at present. Observation of such dramatic changes is unprecedented in studies of luminous YSO's. The data exclude external phenomena such as variable extinction or binary occultation as the origin of the observed variability, and appear more indicative of changes in the physical conditions of the star and its circumstellar environment. C1 SMITHSONIAN INST, NATL AIR & SPACE MUSEUM, ASTROPHYS LAB, WASHINGTON, DC 20560 USA. USN, RES LAB, DIV REMOTE SENSING, WASHINGTON, DC 20375 USA. JOINT ASTRON CTR, HILO, HI 96720 USA. RP NISINI, B (reprint author), CNR, IST FIS SPAZIO INTERPLANETARIO, CASELLA POSTALE 27, I-00044 FRASCATI, ITALY. NR 31 TC 11 Z9 11 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 OCT PY 1994 VL 290 IS 2 BP 463 EP 472 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PM605 UT WOS:A1994PM60500014 ER PT J AU PIERRE, M BOHRINGER, H EBELING, H VOGES, W SCHUECKER, P CRUDDACE, R MACGILLIVRAY, H AF PIERRE, M BOHRINGER, H EBELING, H VOGES, W SCHUECKER, P CRUDDACE, R MACGILLIVRAY, H TI OPTICAL OBSERVATIONS OF A ROSAT SAMPLE OF CLUSTERS OF GALAXIES .1. TECHNIQUES AND X-RAY OPTICAL ANALYSIS SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE METHODS, DATA ANALYSIS; GALAXIES, CLUSTERS OF GALAXIES, DISTANCES AND REDSHIFTS; X-RAYS, GALAXIES ID BL LACERTAE OBJECTS; RICH CLUSTERS; VELOCITY DISPERSIONS; EXOSAT OBSERVATIONS; ABELL CLUSTERS; RAY; CENTAURUS; REDSHIFTS; SPECTROSCOPY; CATALOG AB The applications of clusters of galaxies to cosmology are multiple and currently of special importance; it is thus of great interest to construct large unbiased samples. We present here the first results from optical follow-up observations of a ROSAT subsample of 42 clusters of galaxies in a contiguous area covering about 1700 square degrees. The general detection and selection procedures from the ROSAT All-Sky Survey adopted for clusters are described in detail. Further optical identifications of the cluster candidates and the measurement of their redshifts at the 3.6m ESO Telescope are presented. Various optical/X-ray correlations are investigated. Special care is given to the study of the significance of the observed cluster X-ray morphologies. X-ray contour plots for all clusters are shown, and for 31 objects, overlays on top of CCD images are presented in order to outline the correlation between optical and X-ray morphologies in detail and to flag possible contamination by unrelated point-like objects. C1 UNIV MUNSTER, INST ASTRON, MUNSTER, GERMANY. USN, RES LAB, WASHINGTON, DC 20375 USA. ROYAL OBSERV, EDINBURGH EH9 3HJ, MIDLOTHIAN, SCOTLAND. RP PIERRE, M (reprint author), MAX PLANCK INST EXTRATERR PHYS, KARL SCHWARZSCHILD STR 1, D-85740 GARCHING, GERMANY. NR 36 TC 38 Z9 38 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 OCT PY 1994 VL 290 IS 3 BP 725 EP 752 PG 28 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PN354 UT WOS:A1994PN35400006 ER PT J AU DOBIE, TG MAY, JG AF DOBIE, TG MAY, JG TI COGNITIVE-BEHAVIORAL MANAGEMENT OF MOTION SICKNESS SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID SCOPOLAMINE; PROGRAM AB This monograph is intended to provide health professionals with information on a cognitive behavioral technique which was developed to teach individuals who are prone to motion sickness to better cope with motion environments. It includes an overview of motion sickness, describing the signs and symptoms, etiology and incidence of this malady. Prevention and treatment are then reviewed, including both pharmacological and non-pharmacological therapies. The historical background on the cognitive-behavioral technique is then discussed. This is followed by a review of supporting experimental work, and an account of how such counselling should be carried our. Finally, a number of current military desensitisation programs are compared and con trasted with cognitive-behavioral therapy. C1 UNIV NEW ORLEANS,DEPT PSYCHOL,NEW ORLEANS,LA 70148. RP DOBIE, TG (reprint author), USN,BIODYNAM LAB,DEPT MOT SCI,BOX 29407,NEW ORLEANS,LA 70189, USA. NR 57 TC 24 Z9 31 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 OCT PY 1994 VL 65 IS 10 SU S BP C1 EP C20 PG 20 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA PM538 UT WOS:A1994PM53800001 PM 7811217 ER PT J AU SMITH, DR MULVANY, JAP KRAYER, WA ROSENTHAL, MA KOESTER, GJ LEES, RL MATKINS, JJ SMITH, B SANFORD, W HARRELL, LE AF SMITH, DR MULVANY, JAP KRAYER, WA ROSENTHAL, MA KOESTER, GJ LEES, RL MATKINS, JJ SMITH, B SANFORD, W HARRELL, LE TI AERAS HOST TEACHER WORKSHOP - HAZARDOUS WEATHER CONFERENCE FOR EDUCATORS SO BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY LA English DT Article ID PROJECT ATMOSPHERE AB Project ATMOSPHERE atmospheric educational resource agents (AERAs) representing the mid-Atlantic states pooled resources to conduct a regional workshop for teachers. This conference used hazardous weather as its central theme. Over 150 people attended this one-day event held in Richmond, Virginia, which included three concurrent sessions of eight presentations each. The workshop included presentations by meterologists and educators from the National Oceanic and Atmospheric Administration, Virginia Power, and television stations, as well as the AERAs themselves. The presentations were designed to develop basic understandings about hazardous weather and to provide guidance for establishing hazardous weather emergency action plans for schools. The orientation of the program was hands-on, including a number of activities for teachers to implement in the classroom. This workshop demonstrates how educators and scientists can form partnerships to improve science education. C1 MILLS E GODWIN HIGH SCH,AERA,PROJECT ATMOSPHERE,HENRICO,VA. GAITHERSBURG HIGH SCH,AERA,PROJECT ATMOSPHERE,GAITHERSBURG,MD. RANDOLPH HIGH SCH,AERA,PROJECT ATMOSPHERE,RANDOLPH,NJ. ANNE ARUNDEL CTY BOARD,AERA,PROJECT ATMOSPHERE,ANNAPOLIS,MD. LYNDHURST HIGH SCH,AERA,PROJECT ATMOSPHERE,LYNDHURST,NJ. LOUISA MIDDLE SCH,AERA,PROJECT ATMOSPHERE,SPRINGFIELD,VA. FAIRFAX CTY PUBL SCH,LAKE BRADDOCK SECONDARY SCH,AERA,PROJECT ATMOSPHERE,BURKE,VA. RP SMITH, DR (reprint author), USN ACAD,DEPT OCEANOG,572 HOLLOWAY RD,ANNAPOLIS,MD 21402, USA. NR 5 TC 4 Z9 4 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 OCT PY 1994 VL 75 IS 10 BP 1839 EP 1845 PG 7 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA PN886 UT WOS:A1994PN88600008 ER PT J AU GEORGE, RD SNOW, AW AF GEORGE, RD SNOW, AW TI PHTHALOCYANINE GLASSES SO CHEMISTRY OF MATERIALS LA English DT Note C1 USN,RES LAB,WASHINGTON,DC 20375. NR 5 TC 26 Z9 26 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD OCT PY 1994 VL 6 IS 10 BP 1587 EP 1588 DI 10.1021/cm00046a001 PG 2 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA PM630 UT WOS:A1994PM63000001 ER PT J AU LEWIS, T AF LEWIS, T TI THE NEXT BIG THING SO COMPUTER LA English DT Editorial Material RP LEWIS, T (reprint author), USN,POSTGRAD SCH,WASHINGTON,DC 20350, 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 90720-1264 SN 0018-9162 J9 COMPUTER JI Computer PD OCT PY 1994 VL 27 IS 10 BP 6 EP 7 PG 2 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA PK654 UT WOS:A1994PK65400005 ER PT J AU STONE, LC SHUKLA, SB NETA, B AF STONE, LC SHUKLA, SB NETA, B TI PARALLEL SATELLITE ORBIT PREDICTION USING A WORKSTATION CLUSTER SO COMPUTERS & MATHEMATICS WITH APPLICATIONS LA English DT Article DE PARALLEL COMPUTING; ORBIT PREDICTION; DOMAIN DECOMPOSITION; PVM AB In this paper, the benefits of parallel computing using a workstation cluster are explored for satellite orbit prediction. Data and function decomposition techniques are used. Speedup and throughput are the performance metric studied. The software employed for parallelization was the Parallel Virtual Machine (PVM) developed by the Oak Ridge National Laboratory. PVM enables a network of heterogeneous workstations to appear as a parallel multicomputer to the user programs. A speedup of almost 6 was achieved when using 8 SUN workstations. C1 USN,POSTGRAD SCH,CODE MA-ND,MONTEREY,CA 93943. RI Neta, Beny/B-1737-2009 NR 4 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0898-1221 J9 COMPUT MATH APPL JI Comput. Math. Appl. PD OCT PY 1994 VL 28 IS 8 BP 1 EP 8 DI 10.1016/0898-1221(94)00165-0 PG 8 WC Mathematics, Applied SC Mathematics GA PM533 UT WOS:A1994PM53300001 ER PT J AU BLACKLEDGE, RD AF BLACKLEDGE, RD TI COLLECTION AND IDENTIFICATION GUIDELINES FOR TRACES FROM LATEX CONDOMS IN SEXUAL ASSAULT CASES SO CRIME LABORATORY DIGEST LA English DT Article RP BLACKLEDGE, RD (reprint author), USN,CRIMINAL INVESTIGAT SERV,SAN DIEGO,CA 92132, USA. NR 0 TC 8 Z9 8 U1 0 U2 0 PU FBI LABORATORY PI WASHINGTON PA JEH-FBI BLDG, WASHINGTON, DC 20535 SN 0743-1872 J9 CRIME LAB DIGEST JI Crime Lab. Digest PD OCT PY 1994 VL 21 IS 4 BP 57 EP 61 PG 5 WC Medicine, Legal; Pathology SC Legal Medicine; Pathology GA PK374 UT WOS:A1994PK37400002 ER PT J AU CRUTCHER, JM JONES, TR HOFFMAN, SL AF CRUTCHER, JM JONES, TR HOFFMAN, SL TI IMMUNOLOGY, PATHOPHYSIOLOGY, AND TREATMENT OF MALARIA SO CURRENT OPINION IN INFECTIOUS DISEASES LA English DT Article AB Despite increasing research and control efforts over the past 20 years, malaria remains one of the world's most significant health problems. As the disease flourishes and drug resistance spreads, the search for vaccines and effective drugs for therapy and prophylaxis becomes ever more important. Recent advances in our understanding of the ultrastructure and biology of Plasmodia will aid that quest. For vaccines, work continues on identifying the immune mechanisms and parasite targets responsible for protective immunity and developing methods of constructing the subunit vaccines that will provide such immunity. One promising vaccine, SPf66, is being evaluated in several field trials. Mefloquine, the drug most commonly used for prophylaxis in areas with chloroquine-resistant Plasmodium falciparum, remains effective in most areas, except in parts of southeast Asia where high-grade multidrug resistance is prevalent. In prophylactic doses, it has proved to be as safe as chloroquine. For therapy, halofantrine is highly effective in areas with drug resistance. Artemisinin compounds are effective in treating severe malaria caused by multidrug-resistant P. falciparum. RP CRUTCHER, JM (reprint author), USN,MED RES INST,MALARIA PROGRAM,12300 WASHINGTON AVE,ROCKVILLE,MD 20852, USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU RAPID SCIENCE PUBLISHERS PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8NH SN 0951-7375 J9 CURR OPIN INFECT DIS JI Curr. Opin. Infect. Dis. PD OCT PY 1994 VL 7 IS 5 BP 529 EP 535 DI 10.1097/00001432-199410000-00002 PG 7 WC Infectious Diseases SC Infectious Diseases GA PN232 UT WOS:A1994PN23200002 ER PT J AU MACDONALD, ML WEISS, PJ DELOACHBANTA, LJ COMER, SW AF MACDONALD, ML WEISS, PJ DELOACHBANTA, LJ COMER, SW TI PRIMARY CUTANEOUS MUCORMYCOSIS WITH A MUCOR SPECIES - IS IRON OVERLOAD A FACTOR SO CUTIS LA English DT Article ID RHIZOPUS INFECTION; DEFEROXAMINE AB A severely debilitated patient showed primary cutaneous mucormycosis with a Mucor species at a tape erosion site. The pathogenic nature and epidemiologic features of this unusual fungal infection are reviewed to emphasize its recognition in the differential diagnosis of ischemic lesions in immunocompromised patients. Iron overload may be a risk factor for mucormycosis. C1 USN,REG MED CTR,DEPT DERMATOL,SAN DIEGO,CA 92134. USN,REG MED CTR,DEPT INTERNAL MED,DIV INFECT DIS,SAN DIEGO,CA 92134. USN,REG MED CTR,DEPT LAB,DIV PATHOL,SAN DIEGO,CA 92134. USN,REG MED CTR,DEPT CLIN INVEST,SAN DIEGO,CA 92134. NR 16 TC 8 Z9 8 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 OCT PY 1994 VL 54 IS 4 BP 275 EP 278 PG 4 WC Dermatology SC Dermatology GA PL768 UT WOS:A1994PL76800014 PM 7805414 ER PT J AU BOYD, JD KENNELLY, EP PISTEK, P AF BOYD, JD KENNELLY, EP PISTEK, P TI ESTIMATION OF EOF EXPANSION COEFFICIENTS FROM INCOMPLETE DATA SO DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS LA English DT Article ID SEA-SURFACE TEMPERATURE; FIELD AB A least-squares minimization technique for estimating empirical orthogonal function expansion (EOF) coefficients from incomplete ocean profile data is presented, and its use for interpolating or extrapolating profiles is described. C1 NEPTUNE SCI INC,SLIDELL,LA 70458. RP BOYD, JD (reprint author), USN,RES LAB,BAY ST LOUIS,MS 39529, USA. NR 9 TC 11 Z9 11 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0967-0637 J9 DEEP-SEA RES PT I JI Deep-Sea Res. Part I-Oceanogr. Res. Pap. PD OCT PY 1994 VL 41 IS 10 BP 1479 EP 1488 DI 10.1016/0967-0637(94)90056-6 PG 10 WC Oceanography SC Oceanography GA QB438 UT WOS:A1994QB43800003 ER PT J AU ARISTEGUI, J SANGRA, P HERNANDEZLEON, S CANTON, M HERNANDEZGUERRA, A AF ARISTEGUI, J SANGRA, P HERNANDEZLEON, S CANTON, M HERNANDEZGUERRA, A TI ISLAND-INDUCED EDDIES IN THE CANARY-ISLANDS SO DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS LA English DT Article ID NORTH-ATLANTIC; SEA-SURFACE; CIRCULATION; OCEAN; WATER; BOUNDARY AB Cyclonic and anticyclonic eddies were observed downstream of Gran Canaria (Canary Islands), an almost circular island of about 50 km diameter, located in the path of the Canary Current. Temperature data were obtained from five AXBT and one CTD surveys carried out during two years (April, May and December, 1989; February, May and June, 1990), and from NOAA AVHRR (Advanced Very High Resolution Radiometer) sea surface temperature (SST) satellite images. The presence of eddies in most of the surveys and in many SST images suggests that they are common mesoscale features in the flow past the island throughout the year. In general, eddy diameter is similar to the width of the island, while the vertical extent is from the near-surface layers down to at least 400 m depth. However, vertical sections across the eddies show distinct patterns in their structures which could correspond to different stages of development. Wakes of relatively warm surface water develop in the lee of the island, interacting with the eddies and affecting their upper mixed layer structure. It is hypothesized that eddies are sequentially spun off from the island with a period ranging from several days to two weeks. If this is the case, they could contribute to the high levels of eddy kinetic energy observed recently downstream of the Canarian archipelago from moored current meters. C1 USN,ORG OFF,BAY ST LOUIS,MS 39529. RP ARISTEGUI, J (reprint author), UNIV LAS PALMAS GRAN CANARIA,FAC CIENCIAS MAR,LAS PALMAS,SPAIN. RI Hernandez-Guerra, Alonso/A-4747-2008; Aristegui, Javier/D-5833-2013; Sangra, Pablo/I-1350-2015 OI Hernandez-Guerra, Alonso/0000-0002-4883-8123; Sangra, Pablo/0000-0002-6600-2194 NR 34 TC 120 Z9 122 U1 1 U2 11 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0967-0637 J9 DEEP-SEA RES PT I JI Deep-Sea Res. Part I-Oceanogr. Res. Pap. PD OCT PY 1994 VL 41 IS 10 BP 1509 EP 1525 DI 10.1016/0967-0637(94)90058-2 PG 17 WC Oceanography SC Oceanography GA QB438 UT WOS:A1994QB43800005 ER PT J AU CARGILL, PJ CHEN, J HAROLD, JB AF CARGILL, PJ CHEN, J HAROLD, JB TI ONE-DIMENSIONAL HYBRID SIMULATIONS OF CURRENT SHEETS IN THE QUIET MAGNETOTAIL SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID DISCONTINUITIES; MODEL AB Hybrid simulations (kinetic ions, massless fluid electrons) have been performed of the magnetotail current sheet for parameters characteristic of the quiet magnetotail (v(D), b(n) << 1). Here b(n) = B-n/B-0, v(D) = (cE(y)/B-n)/v(i), B-n is the north / south (z) magnetic field, B-0 the asymptotic value of the tailward (x) field and v(i) the ion thermal speed, where the magnetospheric coordinate system is used. It is shown that the current sheet is more stable than in previously examined cases with high v(D) and / or large b(n). A clear single reversal in B-x persists over the entire simulation and a B-y component is created, with a slow rate of growth (hundreds of Omega(i)(-1), where Omega(i) = eB(0)/m(i)c). This is many minutes in real time. It is suggested that the waves are due to an electromagnetic instability of the cross-field ion current. RP CARGILL, PJ (reprint author), USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,CODE 6790,WASHINGTON,DC 20375, USA. NR 14 TC 8 Z9 8 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 OCT 1 PY 1994 VL 21 IS 20 BP 2251 EP 2254 DI 10.1029/94GL01693 PG 4 WC Geosciences, Multidisciplinary SC Geology GA PK063 UT WOS:A1994PK06300018 ER PT J AU REMMENGA, SW COLCHER, D GANSOW, O PIPPEN, CG RAUBITSCHEK, A AF REMMENGA, SW COLCHER, D GANSOW, O PIPPEN, CG RAUBITSCHEK, A TI CONTINUOUS-INFUSION CHEMOTHERAPY AS A RADIATION-ENHANCING AGENT FOR YTTRIUM-90-RADIOLABELED MONOCLONAL-ANTIBODY THERAPY OF A HUMAN TUMOR XENOGRAFT SO GYNECOLOGIC ONCOLOGY LA English DT Article ID RADIOLABELED ANTIBODIES; DOSE FRACTIONATION; OVARIAN-CANCER; COLON CANCER; X-RAYS; RADIOIMMUNOTHERAPY; 5-FLUOROURACIL; CARCINOMA; B72.3; CELLS AB Radioimmunotherapy using monoclonal antibodies is a promising investigational treatment modality for solid tumors. Use of radiation-enhancing agents could significantly impact on the therapeutic response of this treatment. We evaluated the potential interaction of a known radiation-enhancing agent, 5-fluorouracil (5-FU), with the radioimmunotherapeutic effect of a yttrium-90 (Y-90)-labeled monoclonal antibody in a human adenocarcinoma xenograft. Athymic mice were inoculated subcutaneously with the human colon carcinoma cell line LS-174T. All mice had intraperitoneal 3-day osmotic infusion pumps placed by laparotomy. Half of the pumps were filled with 0.9% saline solution and half were filled with a solution containing 5-FU. Three activity levels of Y-90-radiolabeled CC49 antibody were injected into tail veins of the mice. Each activity level was injected into a group of animals with saline-filled pumps and a group with 5-FU-filled pumps. A significant interaction between treatment group and time was found suggesting that the rate of tumor growth for the group of animals receiving Y-90 at 100 muCi plus 5-FU compared to the group of animals receiving Y-90 alone was significantly delayed (P = 0.0055), showing a radiation enhancing effect by 5-FU. These results suggest that the addition of the radiation-enhancing agent 5-FU to radiolabeled antibody may increase the ability to treat solid tumors. Further investigations with other antibodies, radionuclides, and tumor models are indicated. (C) 1994 Academic Press, Inc. C1 NCI,RADIAT ONCOL BRANCH,CHEM SECT,BETHESDA,MD 20892. CITY HOPE NATL MED CTR,DEPT RADIOIMMUNOTHERAPY,DUARTE,CA 91010. UNIV NEBRASKA,MED CTR,DEPT PATHOL MICROBIOL,OMAHA,NE 68101. RP REMMENGA, SW (reprint author), USN,MED CTR,DEPT OBSTET & GYNECOL,DIV GYNECOL ONCOL,PORTSMOUTH,VA 23708, USA. NR 42 TC 16 Z9 16 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0090-8258 J9 GYNECOL ONCOL JI Gynecol. Oncol. PD OCT PY 1994 VL 55 IS 1 BP 115 EP 122 DI 10.1006/gyno.1994.1259 PG 8 WC Oncology; Obstetrics & Gynecology SC Oncology; Obstetrics & Gynecology GA PP046 UT WOS:A1994PP04600024 PM 7959251 ER PT J AU LUNDY, GM TIPICI, HA AF LUNDY, GM TIPICI, HA TI SPECIFICATION AND ANALYSIS OF THE SNR HIGH-SPEED TRANSPORT PROTOCOL SO IEEE-ACM TRANSACTIONS ON NETWORKING LA English DT Article AB In recent years the emergence of optical fiber and its correspondingly high data rates have led to the development of much higher speed networks, both locally and over the long haul. These developments led to the design of new transport protocols, which were intended to take advantage of the high-speed networks. A number of these so-called ''high-speed transport protocols'' have been designed to date. This paper considers one of these, called the SNR protocol in detail. A formal specification of the protocol is presented, using the protocol model systems of communicating machines, and the protocol is then analyzed through the specification. An implementation of the protocol based on this formal definition has also been made, and used to simulate the protocol, providing further insights into its performance. Based on the combined results of the analysis and the simulated protocol, a high degree of confidence is gained in the correctness of the protocol. The specification is quite detailed, and from it an implementation should be fairly straightforward. The paper also discusses the difficulties encountered during the analysis of such a complex protocol, and suggests some possible solutions to these problems. Finally, as a result of this work, we comment an the strengths and weakness of the SNR protocol as a solution to the high speed transport protocol problem, and make two simple suggestions for improving it. RP LUNDY, GM (reprint author), USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 26 TC 3 Z9 3 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 OCT PY 1994 VL 2 IS 5 BP 483 EP 496 DI 10.1109/90.336323 PG 14 WC Computer Science, Hardware & Architecture; Computer Science, Theory & Methods; Engineering, Electrical & Electronic; Telecommunications SC Computer Science; Engineering; Telecommunications GA QA782 UT WOS:A1994QA78200006 ER PT J AU CANDY, JV SULLIVAN, EJ AF CANDY, JV SULLIVAN, EJ TI MODEL-BASED PROCESSING FOR A LARGE-APERTURE ARRAY SO IEEE JOURNAL OF OCEANIC ENGINEERING LA English DT Article ID DYNAMIC-SYSTEMS; VERTICAL ARRAY; SHALLOW-WATER AB A model-based approach to solve a deep water ocean acoustic signal processing problem based on a state-space representation of the normal-mode propagation model is developed. The design of a model-based processor (MBP) for signal enhancement employing an array consisting of a large number of sensors for a deep ocean surveillance operation is discussed. The processor provides enhanced estimates of the measured pressure-field, modes, and residual (innovations) sequence indicating the performance or adequacy of the propagation model relative to the data. It is shown that due to the structure of the normal-mode model the state-space propagator is not only feasible for this large scale problem, but in fact, can be implemented by a set of decoupled parallel second-order processors, implying a real-time capability. In the paper we discuss the design and application of the processor to a realistic set of simulated pressure-field data developed from a set of experiments and sound speed parameters. C1 USN,CTR UNDERSEA WARFARE,DIV PHYS & TECHNOL,NEWPORT,RI 02841. RP CANDY, JV (reprint author), LAWRENCE LIVERMORE NATL LAB,CTR ADV SIGNAL & IMAGE SCI,IMAGING & DETECT PROGRAM,LIVERMORE,CA 94550, USA. NR 22 TC 2 Z9 4 U1 1 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0364-9059 J9 IEEE J OCEANIC ENG JI IEEE J. Ocean. Eng. PD OCT PY 1994 VL 19 IS 4 BP 519 EP 528 DI 10.1109/48.338388 PG 10 WC Engineering, Civil; Engineering, Ocean; Engineering, Electrical & Electronic; Oceanography SC Engineering; Oceanography GA PX325 UT WOS:A1994PX32500004 ER PT J AU CERVENKA, P DEMOUSTIER, C AF CERVENKA, P DEMOUSTIER, C TI POSTPROCESSING AND CORRECTIONS OF BATHYMETRY DERIVED FROM SIDESCAN SONAR SYSTEMS - APPLICATION WITH SEAMARC-II SO IEEE JOURNAL OF OCEANIC ENGINEERING LA English DT Article AB A procedure for postprocessing bathymetry data provided by a phase-measuring sidescan sonar system is presented. The data were collected with the SeaMARC II system, and are generally characterized by a high level of noise and uneven spatial sampling. Before any spatial filtering is applied, data are selected to remove most of the obvious artifacts and to retain instantaneous depth profiles whose slant ranges increase monotonically from a central location to the edges of the swath. An extrapolation scheme, patterned after a potential field, is proposed to fill gaps in the coverage or to extend the bathymetric swath to that of the corresponding sidescan image when regridding the data to a rectangular frame. To fill the near nadir gap typically found in these data, a specific interpolation methodology is developed that takes into account the slant range of the first bottom return as received by the sidescan sonar itself or by a shipboard echo-sounder. Spatial low-pass filtering is applied through convolutions with parabolic windows whose width is proportional to the footprint of the acoustic beam along track and roughly 1/8 of the swath width across track. Mismatches of contour lines between adjacent tracks are reduced through a statistical method designed to correct systematic athwartship profile errors. C1 UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,MARINE PHYS LAB,LA JOLLA,CA 92093. USN,RES LAB,MARINE PHYS BRANCH,WASHINGTON,DC 20375. RI Cervenka, Pierre/D-6141-2013 OI Cervenka, Pierre/0000-0001-9994-2505 NR 16 TC 1 Z9 2 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 0364-9059 J9 IEEE J OCEANIC ENG JI IEEE J. Ocean. Eng. PD OCT PY 1994 VL 19 IS 4 BP 619 EP 629 DI 10.1109/48.338398 PG 11 WC Engineering, Civil; Engineering, Ocean; Engineering, Electrical & Electronic; Oceanography SC Engineering; Oceanography GA PX325 UT WOS:A1994PX32500015 ER PT J AU BORDEN, B AF BORDEN, B TI REQUIREMENTS FOR OPTIMAL GLINT REDUCTION BY DIVERSITY METHODS SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Letter AB Target ''glint'' (the difference between the phase-front gradient of the scattered field and the true target direction vector) is related to the analytic properties of the scattered field. The resulting model is used to reinterpret diversity methods for glint reduction and to more accurately specify system requirements. A relationship for estimating the best possible improvement in target bearing estimation is also developed. RP BORDEN, B (reprint author), USN,CTR AIR WARFARE,DIV WEAPONS,CODE CO2313,CHINA LAKE,CA 93555, USA. NR 20 TC 8 Z9 9 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 0018-9251 J9 IEEE T AERO ELEC SYS JI IEEE Trans. Aerosp. Electron. Syst. PD OCT PY 1994 VL 30 IS 4 BP 1108 EP 1114 DI 10.1109/7.328783 PG 7 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA PM678 UT WOS:A1994PM67800019 ER PT J AU TRUNK, GV KIM, MW AF TRUNK, GV KIM, MW TI AMBIGUITY RESOLUTION OF MULTIPLE TARGETS USING PULSE-DOPPLER WAVE-FORMS SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Letter AB To cancel clutter, both medium-PRF waveforms which are ambiguous in both range and Doppler and high-PRF waveforms which are ambiguous in range but unambiguous in ambiguities, a previous paper has shown that superior results for a single target can be achieved by using a clustering algorithm. Here, the problem of multiple targets is considered. A maximum likelihood (ML) technique which incorporates the clustering algorithm is developed for the multiple target problem. Simulation results show that four targets which have the same speed but are at different ranges can be resolved by using a medium-PRF waveform and employing the ML resolution technique. RP TRUNK, GV (reprint author), USN,RES LAB,DIV RADAR,RADAR ANAL BRANCH,CODE 5310,WASHINGTON,DC 20375, USA. NR 10 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 0018-9251 J9 IEEE T AERO ELEC SYS JI IEEE Trans. Aerosp. Electron. Syst. PD OCT PY 1994 VL 30 IS 4 BP 1131 EP 1137 PG 7 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA PM678 UT WOS:A1994PM67800026 ER PT J AU MOOSE, PH AF MOOSE, PH TI A TECHNIQUE FOR ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING FREQUENCY OFFSET CORRECTION SO IEEE TRANSACTIONS ON COMMUNICATIONS LA English DT Article AB This paper discusses the effects of frequency offset on the performance of orthogonal frequency division multiplexing (OFDM) digital communications. The main problem with frequency offset is that it introduces interference among the multiplicity of carriers in the OFDM signal. It is shown, and confirmed by simulation, that to maintain signal-to-interference ratios of 20 dB or greater for the OFDM carriers, offset is limited to 4% or less of the intercarrier spacing. Next, the paper describes a technique to estimate frequency offset using a repeated data symbol. A maximum likelihood estimation (MLE) algorithm is derived and its performance computed and compared with simulation results. Since the intercarrier interference energy and signal energy both contribute coherently to the estimate, the algorithm generates extremely accurate estimates even when the offset is far too great to demodulate the data values. Also, the estimation error depends only on total symbol energy so it is insensitive to channel spreading and frequency selective fading. A strategy is described for initial acquisition in the event of uncertainty in the initial offset that exceeds 1/2 the carrier spacing, the limit of the MLE algorithm. RP USN, POSTGRAD SCH, DEPT ELECT & COMP ENGN, MONTEREY, CA 93943 USA. NR 9 TC 1305 Z9 1437 U1 7 U2 37 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 0090-6778 EI 1558-0857 J9 IEEE T COMMUN JI IEEE Trans. Commun. PD OCT PY 1994 VL 42 IS 10 BP 2908 EP 2914 DI 10.1109/26.328961 PG 7 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA PL437 UT WOS:A1994PL43700018 ER PT J AU FREUND, HP AF FREUND, HP TI A REEXAMINATION OF THE TRAVELING-WAVE INTERACTION SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID FREE-ELECTRON-LASER; GAIN; MICROWAVE; REGIME AB A re-examination of the traveling wave interaction (in the helix traveling wave tube and the free-electron laser) is performed using three-dimensional linear stability analyses for an idealized annular electron beam model in order to investigate the validity of the well-known scaling laws in which the gain varies as the cube (fourth) root of the current when space-charge effects are negligible (dominant). The results indicate that these scaling laws are simplistic generalizations which break down for; broad bandwidth interactions, and that the actual variation of the gain with the current can be more complex. A three-dimensional nonlinear analysis of a free-electron laser using a more realistic electron beam model is also discussed in which these scaling laws are also shown to break down. C1 SCI APPLICAT INT CORP,MCLEAN,VA 22102. RP FREUND, HP (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 18 TC 10 Z9 10 U1 1 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 OCT PY 1994 VL 22 IS 5 BP 499 EP 503 DI 10.1109/27.338259 PG 5 WC Physics, Fluids & Plasmas SC Physics GA PT931 UT WOS:A1994PT93100002 ER PT J AU PARK, GS PARK, SY KYSER, RH ARMSTRONG, CM GANGULY, AK PARKER, RK AF PARK, GS PARK, SY KYSER, RH ARMSTRONG, CM GANGULY, AK PARKER, RK TI BROAD-BAND OPERATION OF A KA-BAND TAPERED GYRO-TRAVELING WAVE AMPLIFIER SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID LARGE-SIGNAL THEORY; TWT AB A wideband low-voltage millimeter-wave gyro-traveling wave tube (gyro-TWT) amplifier operating in the TE(10) rectangular waveguide mode at the fundamental cyclotron frequency is under investigation. The device incorporates precise axial tapering of both the magnetic field and the interaction circuit for broadband operation. Experimental results of a wide (33%) instantaneous bandwidth with a small signal gain in excess of 20 dB and saturated efficiency of similar to 10% were achieved and shown to be in good agreement with the theory. Reflective instability due to multi-pass effects by mismatches was observed and characterized. Gain and efficiency have been limited by this reflective instability rather than by absolute instabilities which limit the performance of gyro-TWT's with uniform cross-section. The start-oscillation current in terms of the relevant experimental parameters such as the beam velocity ratio (alpha), magnetic field detuning and reflection coefficient has been measured and compared with theory. Measurements of the phase variation in terms of the rf frequency have shown that the phase varies +/-30 degrees from fitted linear phase line. C1 POHANG INST SCI & TECHNOL, DEPT PHYS, POHANG, SOUTH KOREA. BK SYST INC, ROCKVILLE, MD 20850 USA. NORTHROP CORP, ROLLING MEADOWS, IL 60008 USA. USN, DIV ELECTR SCI & TECHNOL, VACUUM ELECTR BRANCH, RES LAB, WASHINGTON, DC 20375 USA. RP OMEGA P INC, NEW HAVEN, CT 06520 USA. RI Park, Gunsik/A-1415-2014 NR 18 TC 41 Z9 44 U1 0 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 0093-3813 EI 1939-9375 J9 IEEE T PLASMA SCI JI IEEE Trans. Plasma Sci. PD OCT PY 1994 VL 22 IS 5 BP 536 EP 543 DI 10.1109/27.338265 PG 8 WC Physics, Fluids & Plasmas SC Physics GA PT931 UT WOS:A1994PT93100008 ER PT J AU FLIFLET, AW MANHEIMER, WM FISCHER, RP AF FLIFLET, AW MANHEIMER, WM FISCHER, RP TI DESIGNS FOR AN INFRARED FREE-ELECTRON LASER-BASED ON GYROTRON-POWERED ELECTROMAGNETIC WIGGLERS SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID PERIOD-WIGGLER; WAVE; CW; FEASIBILITY; BEAM AB The possibility of developing gyrotron-powered electromagnetic wiggler free-electron laser (FEL) oscillators is of considerable interest for reducing the electron energy required for operation in the infrared spectrum. This paper considers the design of a 10.6 mu m electromagnetic wiggler FEL experiment based on the University of California at Santa Barbara (UCSB) 6 MeV electrostatic accelerator. Both waveguide and quasioptical wiggler resonator configurations are considered. A prescription for optimizing the gain of a waveguide electromagnetic wiggler FEL is derived and the nonlinear regime is treated by relating the electromagnetic wiggler FEL equations-of-motion to the ''universal'' normalized FEL equations. Point designs are given showing accelerator, gyrotron, and output parameters for 10.6 mu m Proof-of-Principle FEL experiments based on both waveguide gyrotron and quasioptical gyrotron wigglers. Designs are given for both a 5- and a 2-A FEL electron beam. C1 USN, RES LAB, DIV PLASMA PHYS, WASHINGTON, DC 20375 USA. RP CALTECH, DIV CHEM & CHEM ENGN, PASADENA, CA 91125 USA. NR 28 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 0093-3813 EI 1939-9375 J9 IEEE T PLASMA SCI JI IEEE Trans. Plasma Sci. PD OCT PY 1994 VL 22 IS 5 BP 638 EP 648 DI 10.1109/27.338277 PG 11 WC Physics, Fluids & Plasmas SC Physics GA PT931 UT WOS:A1994PT93100020 ER PT J AU HAFIZI, B SPRANGLE, P FISHER, A AF HAFIZI, B SPRANGLE, P FISHER, A TI TUNABLE COMPACT HIGH-POWER FAR-INFRARED GRATING FREE-ELECTRON LASER SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID GENERATION; RADIATION AB The linear and nonlinear operation of a multiwave grating free-electron laser is described. The radiation is generated by the passage of an annular electron beam through a coaxial waveguide, the central conductor being in the form of a corrugated cylinder. The model includes the effects of self-field forces, beam emittance and gyromotion of electrons in a guide magnetic field. The efficiency is determined by numerical simulation and compared with analytical estimates. A compact source utilizing, for example, a high brightness beam from a carbon fibre electron gun, that is tunable in the wavelength band 35-55 mu m with output in the kilowatt range, is shown to be feasible. C1 USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,WASHINGTON,DC 20375. RP HAFIZI, B (reprint author), ICARUS RES,POB 30780,BETHESDA,MD 20824, USA. NR 30 TC 2 Z9 2 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 0093-3813 J9 IEEE T PLASMA SCI JI IEEE Trans. Plasma Sci. PD OCT PY 1994 VL 22 IS 5 BP 666 EP 673 DI 10.1109/27.338281 PG 8 WC Physics, Fluids & Plasmas SC Physics GA PT931 UT WOS:A1994PT93100024 ER PT J AU SERLIN, V FRIEDMAN, M AF SERLIN, V FRIEDMAN, M TI DEVELOPMENT AND OPTIMIZATION OF THE RELATIVISTIC KLYSTRON-AMPLIFIER SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID ELECTRON-BEAMS; MODULATION; POWER; GENERATION; MAGNETRON AB The research and development of the relativistic klystron amplifier (RKA) at the Naval Research Laboratory is reviewed. The experimental and theoretical effort concentrated on the three main aspects of RKA technology development: (1) Limitation on high power RF extraction into the atmosphere (2) Reduction in beam loading effects (3) The new triaxial geometry, in which a large diameter electron beam propagates between two coaxial grounded tubes. The peak RF power generated by the RKA is limited by electron field emission in the RF converter. In the present L-band geometry, electron emission was detected at power levels above similar to 6 GW. Beam loading effects, which also affect power output, may be controlled by spatial and velocity inhomogeneities in the current of the electron beam driving the RKA. Finally, the new triaxial RKA, currently in the final stages of construction, promises to solve many of the existing problems and to extend the frequency domain to 10 GHz with power output in the 10's of GW. RP SERLIN, V (reprint author), USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375, USA. NR 30 TC 29 Z9 41 U1 3 U2 4 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 OCT PY 1994 VL 22 IS 5 BP 692 EP 700 DI 10.1109/27.338284 PG 9 WC Physics, Fluids & Plasmas SC Physics GA PT931 UT WOS:A1994PT93100027 ER PT J AU UHM, HS AF UHM, HS TI A THEORETICAL-ANALYSIS OF RELATIVISTIC KLYSTRON OSCILLATORS SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID ELECTRON-BEAMS; MODULATION; AMPLIFIERS; POWER AB An electron beam pre-modulated at the first cavity in a klystron enters the second cavity opening, exciting it. Induced voltage at the second cavity in a high-power klystron forms a virtual cathode momentarily, sending back a part of the beam toward the first cavity. The relationship between the induced voltage and the return current at the first cavity is investigated. The boundary between the amplifier and oscillator Operation regions is described in the parameter space defined by the return current strength and inter-cavity distance. Nonlinear saturation mechanism of the first cavity excitation is investigated for the oscillator operation region. One of the key saturation mechanisms of the cavity excitation is that the location at which the maximum current modulation occurs starts to shift toward the first cavity, if the induced voltage at the first cavity increases significantly. The saturation amplitude of the induced voltage is an increasing function of the beam intensity and energy, but it is independent of the return current. RP UHM, HS (reprint author), USN,CTR SURFACE WARFARE,10901 NEW HAMPSHIRE AVE,SILVER SPRING,MD 20903, USA. NR 12 TC 3 Z9 6 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 OCT PY 1994 VL 22 IS 5 BP 706 EP 712 PG 7 WC Physics, Fluids & Plasmas SC Physics GA PT931 UT WOS:A1994PT93100029 ER PT J AU NEZHEVENKO, OA YAKOVLEV, VP GOLD, SH HAFIZI, B AF NEZHEVENKO, OA YAKOVLEV, VP GOLD, SH HAFIZI, B TI DESIGN OF A HIGH-POWER X-BAND MAGNICON AMPLIFIER SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID CAVITIES AB We present a design study for an X-band frequency-doubling magnicon amplifier driven by a 500 keV, 172 A beam from a field-emission diode. This study makes use of steady state particle simulations employing the realistic fields of magnicon cavities connected by beam tunnels, and includes the effects of finite electron beam diameter. The simulations propagate an electron beam through a sequence of deflection cavities at 5.7 GHz, followed by an output cavity that operates at 11.4 GHz. The deflection cavities and the output cavity contain synchronously rotating TM modes. The deflection cavities progressively spin up the beam transverse momentum, until alpha = upsilon(perpendicular to)/upsilon(z) > 1, where upsilon(perpendicular to) and upsilon(z) are the velocity components perpendicular and parallel to the axial magnetic field. The output cavity uses this synchronously gyrating beam to generate microwave radiation at twice the drive frequency. Self-consistency of the simulation is achieved by iteration until power balance exists in each cavity, and until the optimum RF phase in each cavity is determined. The final magnicon circuit should produce 20 to 50 MW at 11.4 GHz, depending on initial beam diameter, with a drive power of 1 kW at 5.7 GHz. C1 GEORGE MASON UNIV,FAIRFAX,VA 22021. BUDKER INST NUCL PHYS,NOVOSIBIRSK 630090,RUSSIA. USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,WASHINGTON,DC 20375. ICARUS RES,BETHESDA,MD 20824. RP NEZHEVENKO, OA (reprint author), FM TECHNOL,FAIRFAX,VA 22021, USA. NR 23 TC 10 Z9 10 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 OCT PY 1994 VL 22 IS 5 BP 785 EP 795 DI 10.1109/27.338294 PG 11 WC Physics, Fluids & Plasmas SC Physics GA PT931 UT WOS:A1994PT93100037 ER PT J AU GANGULY, AK PARK, GS ARMSTRONG, CM AF GANGULY, AK PARK, GS ARMSTRONG, CM TI NONLINEAR-THEORY OF HARMONIC PENIOTRON AND GYROTRON INTERACTIONS IN A RISING-SUN SLOTTED WAVE-GUIDE SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID INSTABILITIES AB A fully three-dimensional nonlinear theory is presented for the generation of harmonic peniotron and gyrotron radiation from a gyrating electron beam propagating through a multistage rising-sun type slotted waveguide. For an axisymmetric beam, a strong peniotron interaction is present if the dominant azimuthal mode index, l, of the waveguide modes is equal to s = l - 1 where s is the cyclotron harmonic number and the gyrotron interaction is strong when l = s. Numerical results are shown for a two-stage, six-vane rising-sun circuit to illustrate the stable and efficient operation of the second harmonic peniotron in the pi-mode (TE(31)-like). The modes competing with the gyropeniotron amplification mechanism are suppressed in the two-stage rising-sun configuration. Simulations show that second harmonic gyropeniotron amplifier in the pi-mode can operate at an efficiency of 45% with a 70-kV, 3-A beam having a velocity ratio 1.4, an axial velocity spread of 4%, and a guiding center spread of 4% in the presence of a guide magnetic field 2% below grazing. The instantaneous bandwidth of the amplifier is 4.6%. Since the spent beam is nearly monoenergetic, extremely high efficiency in excess of 70% could be achieved by using a single stage depressed collector to recover energy from the beam. C1 OMEGA P INC,NEW HAVEN,CT 06520. RP GANGULY, AK (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Park, Gunsik/A-1415-2014 NR 16 TC 4 Z9 4 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 OCT PY 1994 VL 22 IS 5 BP 902 EP 912 DI 10.1109/27.338307 PG 11 WC Physics, Fluids & Plasmas SC Physics GA PT931 UT WOS:A1994PT93100050 ER EF