FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Markley, EL AF Markley, EL TI Kepler equation solver SO CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY LA English DT Article DE Kepler's Equation; two-body problem; elliptical motion; numerical methods; orbit propagation AB Kepler's Equation is solved over the entire range of elliptic motion by a fifth-order refinement of the solution of a cubic equation. This method is not iterative, and requires only four transcendental function evaluations: a square root, a cube root, and two trigonometric functions. The maximum relative error of the algorithm is less than one part in 10(18), exceeding the capability of double-precision computer arithmetic. Roundoff errors in double-precision implementation of the algorithm are addressed, and procedures to avoid them are developed. RP Markley, EL (reprint author), NASA,GODDARD SPACE FLIGHT CTR,GUIDANCE & CONTROL BRANCH,CODE 712,GREENBELT,MD 20771, USA. NR 12 TC 10 Z9 10 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0923-2958 J9 CELEST MECH DYN ASTR JI Celest. Mech. Dyn. Astron. PY 1995 VL 63 IS 1 BP 101 EP 111 DI 10.1007/BF00691917 PG 11 WC Astronomy & Astrophysics; Mathematics, Interdisciplinary Applications SC Astronomy & Astrophysics; Mathematics GA UF844 UT WOS:A1995UF84400006 ER PT S AU SAYIR, A FARMER, SC AF SAYIR, A FARMER, SC BE Lowden, RA Ferber, MK Hellmann, JR Chawla, KK DiPietro, SG TI Directionally solidified mullite fibers SO CERAMIC MATRIX COMPOSITES - ADVANCED HIGH-TEMPERATURE STRUCTURAL MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Ceramic Matrix Composites - Advanced High-Temperature Structural Materials, at the 1994 MRS Fall Meeting CY NOV 28-DEC 02, 1994 CL BOSTON, MA SP Mat Res Soc, US DOE, Off Ind Technol, Continuous Fiber Ceram Composites Program, USA, Off Sci Res, NASA, Lewis Res Ctr C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 22 Z9 22 U1 0 U2 4 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-266-9 J9 MATER RES SOC SYMP P PY 1995 VL 365 BP 11 EP 20 PG 10 WC Materials Science, Ceramics; Materials Science, Characterization & Testing; Materials Science, Composites SC Materials Science GA BD89C UT WOS:A1995BD89C00002 ER PT S AU SAYIR, A FARMER, SC DICKERSON, PO YUN, HM AF SAYIR, A FARMER, SC DICKERSON, PO YUN, HM BE Lowden, RA Ferber, MK Hellmann, JR Chawla, KK DiPietro, SG TI Dice temperature mechanical properties of Al2O3/ZrO2(Y2O3) fibers SO CERAMIC MATRIX COMPOSITES - ADVANCED HIGH-TEMPERATURE STRUCTURAL MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Ceramic Matrix Composites - Advanced High-Temperature Structural Materials, at the 1994 MRS Fall Meeting CY NOV 28-DEC 02, 1994 CL BOSTON, MA SP Mat Res Soc, US DOE, Off Ind Technol, Continuous Fiber Ceram Composites Program, USA, Off Sci Res, NASA, Lewis Res Ctr C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 29 Z9 29 U1 0 U2 2 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-266-9 J9 MATER RES SOC SYMP P PY 1995 VL 365 BP 21 EP 27 PG 7 WC Materials Science, Ceramics; Materials Science, Characterization & Testing; Materials Science, Composites SC Materials Science GA BD89C UT WOS:A1995BD89C00003 ER PT S AU ELDRIDGE, JI AF ELDRIDGE, JI BE Lowden, RA Ferber, MK Hellmann, JR Chawla, KK DiPietro, SG TI Elevated temperature fiber push-out testing SO CERAMIC MATRIX COMPOSITES - ADVANCED HIGH-TEMPERATURE STRUCTURAL MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Ceramic Matrix Composites - Advanced High-Temperature Structural Materials, at the 1994 MRS Fall Meeting CY NOV 28-DEC 02, 1994 CL BOSTON, MA SP Mat Res Soc, US DOE, Off Ind Technol, Continuous Fiber Ceram Composites Program, USA, Off Sci Res, NASA, Lewis Res Ctr C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 8 Z9 8 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-266-9 J9 MATER RES SOC SYMP P PY 1995 VL 365 BP 283 EP 290 PG 8 WC Materials Science, Ceramics; Materials Science, Characterization & Testing; Materials Science, Composites SC Materials Science GA BD89C UT WOS:A1995BD89C00040 ER PT S AU ELDRIDGE, JI BHATT, RT AF ELDRIDGE, JI BHATT, RT BE Lowden, RA Ferber, MK Hellmann, JR Chawla, KK DiPietro, SG TI Experimental investigation of interface properties in SiC fiber-reinforced reaction-bonded silicon nitride matrix composites SO CERAMIC MATRIX COMPOSITES - ADVANCED HIGH-TEMPERATURE STRUCTURAL MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Ceramic Matrix Composites - Advanced High-Temperature Structural Materials, at the 1994 MRS Fall Meeting CY NOV 28-DEC 02, 1994 CL BOSTON, MA SP Mat Res Soc, US DOE, Off Ind Technol, Continuous Fiber Ceram Composites Program, USA, Off Sci Res, NASA, Lewis Res Ctr C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-266-9 J9 MATER RES SOC SYMP P PY 1995 VL 365 BP 353 EP 364 PG 12 WC Materials Science, Ceramics; Materials Science, Characterization & Testing; Materials Science, Composites SC Materials Science GA BD89C UT WOS:A1995BD89C00049 ER PT B AU JANESICK, J ELLIOTT, T WINZENREAD, R PINTER, J DYCK, R AF JANESICK, J ELLIOTT, T WINZENREAD, R PINTER, J DYCK, R BE Blouke, MM TI SANDBOX CCDS SO CHARGE-COUPLED DEVICES AND SOLID STATE OPTICAL SENSORS V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Charged-Coupled Devices and Solid State Optical Sensors V CY FEB 06-07, 1995 CL SAN JOSE, CA SP SOC IMAGING SCI & TECHNOL, SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 JET PROP LAB,PASADENA,CA 91109. NR 0 TC 8 Z9 8 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1762-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2415 BP 2 EP 42 DI 10.1117/12.206506 PG 41 WC Engineering, Electrical & Electronic; Remote Sensing; Optics; Physics, Condensed Matter SC Engineering; Remote Sensing; Optics; Physics GA BC84W UT WOS:A1995BC84W00001 ER PT B AU NIXON, RH KEMENY, SE STALLER, CO FOSSUM, ER AF NIXON, RH KEMENY, SE STALLER, CO FOSSUM, ER BE Blouke, MM TI 128X128 CMOS PHOTODIODE-TYPE ACTIVE PIXEL SENSOR WITH ON-CHIP TIMING, CONTROL AND SIGNAL CHAIN ELECTRONICS SO CHARGE-COUPLED DEVICES AND SOLID STATE OPTICAL SENSORS V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Charged-Coupled Devices and Solid State Optical Sensors V CY FEB 06-07, 1995 CL SAN JOSE, CA SP SOC IMAGING SCI & TECHNOL, SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 JET PROP LAB,CTR SPACE MICROELECTR TECHNOL,PASADENA,CA 91109. NR 0 TC 32 Z9 33 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1762-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2415 BP 117 EP 123 DI 10.1117/12.206529 PG 7 WC Engineering, Electrical & Electronic; Remote Sensing; Optics; Physics, Condensed Matter SC Engineering; Remote Sensing; Optics; Physics GA BC84W UT WOS:A1995BC84W00009 ER PT J AU GORMAN, CB MARDER, SR AF GORMAN, CB MARDER, SR TI EFFECT OF MOLECULAR-POLARIZATION ON BOND-LENGTH ALTERNATION, LINEAR POLARIZABILITY, FIRST AND SECOND HYPERPOLARIZABILITY IN DONOR-ACCEPTOR POLYENES AS A FUNCTION OF CHAIN-LENGTH SO CHEMISTRY OF MATERIALS LA English DT Article ID CONJUGATED ORGANIC-MOLECULES; ELECTRONIC HYPERPOLARIZABILITY; SEMIEMPIRICAL METHODS; OPTICAL-PROPERTIES; OPTIMIZATION; PARAMETERS AB The linear (alpha) and nonlinear (beta, gamma) molecular polarizabilities of a series of donor-acceptor polyenes containing 3-8 pi-bonds are studied using the semiempirical AM1 parametrization and finite-field (hyper)polarizability computations as a function molecular polarization and resulting changes in bond-length alternation. Plots of alpha, beta, and gamma versus bond length alternation had similar shapes (although different magnitudes) for each chain length. The changes in alpha, beta, and gamma with molecular length were fit to exponential functions (N-m) for various bond-length alternations. These values varied over a significant range depending upon the value of bond-length alternation chosen. C1 CALTECH,BECKMAN INST,MOLEC MAT RESOURCE CTR,PASADENA,CA 91125. CALTECH,JET PROP LAB,PASADENA,CA 91109. RI Gorman, Christopher/A-3463-2008 OI Gorman, Christopher/0000-0001-7367-2965 NR 38 TC 71 Z9 71 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD JAN PY 1995 VL 7 IS 1 BP 215 EP 220 DI 10.1021/cm00049a033 PG 6 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA QC469 UT WOS:A1995QC46900034 ER PT S AU JOHNS, LS AF JOHNS, LS BE McConathy, DR Korn, P TI ''Reinventing'' NASA, the next frontier SO CIVIL SPACE IN THE CLINTON ERA, 32ND GODDARD MEMORIAL SYMPOSIUM/PARTNERS IN SPACE ... 2001, 41ST ANNUAL MEETING SE SCIENCE AND TECHNOLOGY SERIES LA English DT Proceedings Paper CT 32nd Goddard Memorial Symposium on Civil Space in the Clinton Era/41st Annual Meeting of the American-Astronautical-Society on Partners in Space - 2001 CY MAR 01-02, 1994 CL CRYSTAL CITY, VA SP AIAA, Natl Capitol Sect, Allied Signal Tech Serv, NASA Alumni League, Natl Space Club, Natl Space Soc, Northrop Grumann, Pratt & Whitney, Int Soc Opt Engn, Planetary Soc, TRW Space & Electr Grp, Women Aerosp C1 NASA,OFF SCI & TECHNOL POLICY,WASHINGTON,DC 20546. 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 0278-4017 BN 0-87703-397-8 J9 SCI TECH PY 1995 VL 85 BP 45 EP 52 PG 8 WC Engineering, Aerospace SC Engineering GA BD56Y UT WOS:A1995BD56Y00007 ER PT S AU FINARELLI, P AF FINARELLI, P BE McConathy, DR Korn, P TI NASA's strategic plan for space SO CIVIL SPACE IN THE CLINTON ERA, 32ND GODDARD MEMORIAL SYMPOSIUM/PARTNERS IN SPACE ... 2001, 41ST ANNUAL MEETING SE SCIENCE AND TECHNOLOGY SERIES LA English DT Proceedings Paper CT 32nd Goddard Memorial Symposium on Civil Space in the Clinton Era/41st Annual Meeting of the American-Astronautical-Society on Partners in Space - 2001 CY MAR 01-02, 1994 CL CRYSTAL CITY, VA SP AIAA, Natl Capitol Sect, Allied Signal Tech Serv, NASA Alumni League, Natl Space Club, Natl Space Soc, Northrop Grumann, Pratt & Whitney, Int Soc Opt Engn, Planetary Soc, TRW Space & Electr Grp, Women Aerosp C1 NASA,WASHINGTON,DC 20546. 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 0278-4017 BN 0-87703-397-8 J9 SCI TECH PY 1995 VL 85 BP 61 EP 63 PG 3 WC Engineering, Aerospace SC Engineering GA BD56Y UT WOS:A1995BD56Y00009 ER PT S AU GOLDIN, DS AF GOLDIN, DS BE McConathy, DR Korn, P TI The challenge of space exploration in a new era - Luncheon address 1 SO CIVIL SPACE IN THE CLINTON ERA, 32ND GODDARD MEMORIAL SYMPOSIUM/PARTNERS IN SPACE ... 2001, 41ST ANNUAL MEETING SE SCIENCE AND TECHNOLOGY SERIES LA English DT Proceedings Paper CT 32nd Goddard Memorial Symposium on Civil Space in the Clinton Era/41st Annual Meeting of the American-Astronautical-Society on Partners in Space - 2001 CY MAR 01-02, 1994 CL CRYSTAL CITY, VA SP AIAA, Natl Capitol Sect, Allied Signal Tech Serv, NASA Alumni League, Natl Space Club, Natl Space Soc, Northrop Grumann, Pratt & Whitney, Int Soc Opt Engn, Planetary Soc, TRW Space & Electr Grp, Women Aerosp C1 NASA,WASHINGTON,DC 20546. 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 0278-4017 BN 0-87703-397-8 J9 SCI TECH PY 1995 VL 85 BP 119 EP 127 PG 9 WC Engineering, Aerospace SC Engineering GA BD56Y UT WOS:A1995BD56Y00017 ER PT B AU TRUSZKOWSKI, W AF TRUSZKOWSKI, W BE Bares, J TI AUTOMATION IN THE GRAPHIC ARTS SO COLOR HARD COPY AND GRAPHIC ARTS IV SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Color Hard Copy and Graphic Arts IV CY FEB 06-10, 1995 CL SAN JOSE, CA SP SOC IMAGING SCI & TECHNOL, SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 NASA,GODDARD SPACE FLIGHT CTR,AUTOMAT TECHNOL SECT,GREENBELT,MD 20771. 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 0-8194-1760-2 J9 P SOC PHOTO-OPT INS PY 1995 VL 2413 BP 96 EP 110 DI 10.1117/12.207566 PG 15 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering; Optics SC Computer Science; Optics GA BD03W UT WOS:A1995BD03W00009 ER PT J AU NORRIS, AT POPE, SB AF NORRIS, AT POPE, SB TI MODELING OF EXTINCTION IN TURBULENT-DIFFUSION FLAMES BY THE VELOCITY-DISSIPATION-COMPOSITION PDF METHOD 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 DIRECT NUMERICAL SIMULATIONS AB The velocity-dissipation-composition probability density function (pdf) method is used to model a turbulent CO/H-2/N-2-air-piloted jet diffusion flame in the regime of extinction. The thermochemistry is modeled by a three-scalar simplified formulation obtained by the intrinsic low-dimensional manifold (ILDM) method. Calculations are performed for five different jet velocities, and the scalar pdfs are compared with experimental data. Overall good agreement is obtained between the calculations and the experimental results, with the only significant difference being the high level of scatter in the experimental data compared with the pdf results: reasons for this difference are discussed. The pdf method is found to predict flame extinction at approximately the same jet velocity as that of the experiment. A small amount of local extinction is observed in the pdf results for the high-jet-velocity cases. C1 CORNELL UNIV,SIBLEY SCH MECH & AEROSP ENGN,ITHACA,NY 14853. RP NORRIS, AT (reprint author), NASA,LEWIS RES CTR,INST COMPUTAT MECH PROP,22800 CEDAR POIND RD,BROOKPARK,OH 44142, USA. RI Pope, Stephen/F-6268-2011 OI Pope, Stephen/0000-0001-5629-0420 NR 21 TC 34 Z9 34 U1 0 U2 0 PU ELSEVIER SCIENCE PUBL CO INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD JAN PY 1995 VL 100 IS 1-2 BP 211 EP 220 DI 10.1016/0010-2180(94)00092-7 PG 10 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA QG331 UT WOS:A1995QG33100024 ER PT J AU Bellan, J Harstad, K AF Bellan, J Harstad, K TI Ignition of a binary-fuel (solvent-solute) cluster of drops SO COMBUSTION SCIENCE AND TECHNOLOGY LA English DT Article ID DILUTE CLUSTERS; SPRAYS; EVAPORATION AB Evaporation and ignition of a binary-fuel cluster of drops is described by models under the assumptions that the volatile compound has infinite volatility with respect to the solvent and that the chemistries of the two compounds are independent. A Damkohler number criterion developed for use in sprays is utilized to determine the ignition time. Another criterion is used to determine the ignition location which can be either around individual drops, or around groups of drops inside the cluster, or around the entire cluster. Results show that except for very dilute situations where the initial liquid mass fraction of the volatile is very small, ignition always occurs around the entire cluster. Otherwise, ignition occurs around groups of drops inside the cluster but never around individual drops even though the ratio of the distance between the centers of two adjacent drops by the drop diameter is greater than thirty five. Studies performed by varying the air/fuel mass ratio for a variety of parametric combinations show that: (1) At typical gas temperatures for combustion devices, the ignition of very dense and very dilute clusters of drops is evaporation-controlled for identical chemistries; it is strongly-controlled by solvent ignition in the very dense cluster regime, it is strongly-controlled by ignition of the volatile in the very dilute regime. In the intermediary regime, ignition is controlled by the relative ignition chemistries of the compounds. These conclusions are independent of the amount of volatile initially present in the liquid. (2) The concept of volatile is more strongly associated with the latent heat of evaporation in the dense regime, and more strongly associated with the saturation pressure curve in the very dilute regime. (3) By increasing the surrounding gas temperature one gradually gains control of ignition in the dense and dilute regimes through the evaporation of solvent and volatile respectively. (4) The initial slip velocity between phases affects ignition only in the very dilute regime. (5) Changes in the cluster size affect the ignition time only in the very dense regime. Conclusions (3) and (4) are valid under the assumption of identical kinetics for the two compounds; when different kinetics are considered, it turns out that kinetic effects overwhelmingly dominate ignition. RP Bellan, J (reprint author), CALTECH,JET PROP LAB,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 20 TC 5 Z9 5 U1 0 U2 2 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0010-2202 J9 COMBUST SCI TECHNOL JI Combust. Sci. Technol. PY 1995 VL 111 BP 531 EP 548 PG 18 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical SC Thermodynamics; Energy & Fuels; Engineering GA UQ625 UT WOS:A1995UQ62500026 ER PT S AU WANG, Z KIVELSON, MG JOY, S KHURANA, KK POLANSKEY, C SOUTHWOOD, DJ WALKER, RJ AF WANG, Z KIVELSON, MG JOY, S KHURANA, KK POLANSKEY, C SOUTHWOOD, DJ WALKER, RJ BE Coates, AJ TI SOLAR-WIND INTERACTION WITH SMALL BODIES .1. WHISTLER WING SIGNATURES NEAR GALILEOS CLOSEST APPROACH TO GASPRA AND IDA SO COMPARATIVE STUDIES OF MAGNETOSPHERIC PHENOMENA SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT D1 Symposium of COSPAR Scientific Commission D, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP COMM SPACE RES, INT UNION GEODESY & GEOPHYS, INT ASSOC GEOMAGNETISM & AERON, SCI COMM SOLAR TERRESTRIAL PHYS AB Data from Galileo's two asteroid flybys reveal magnetic fluctuations that ive interpret as perturbations of the solar wind magnetic field caused by an interaction with the nearby asteroid. The scale sizes of the bodies (similar to 14 km for Gaspra and similar to 30 km for Ida) are intermediate between the ion and electron gyroradii, which implies that the asteroid-imposed perturbations propagate in the whistler mode. Special properties of the whistler mode include phase velocities that can exceed the solar wind speed and confinement of the disturbance to directions nearly aligned with the magnetic field. These features of the interaction impose a structure on the solar wind disturbance that differs greatly from the forms familiar for either magnetized or unmagnetized bodies of magnetohydrodynamic spatial scales. We examine both data and computer simulations of the interaction with special attention to what can be inferred about the interaction itself from analysis of the data. C1 UNIV CALIF LOS ANGELES,DEPT EARTH & SPACE SCI,LOS ANGELES,CA 90024. JET PROPULS LAB,PASADENA,CA. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,LONDON,ENGLAND. RP WANG, Z (reprint author), UNIV CALIF LOS ANGELES,INST GEOPHYS & PLANETARY SCI,LOS ANGELES,CA 90024, USA. RI Kivelson, Margaret/I-9019-2012 OI Kivelson, Margaret/0000-0003-3859-8581 NR 4 TC 10 Z9 10 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042624-7 J9 ADV SPACE RES PY 1995 VL 16 IS 4 BP 47 EP 57 DI 10.1016/0273-1177(95)00208-V PG 11 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC67G UT WOS:A1995BC67G00009 ER PT S AU KIVELSON, MG WANG, Z JOY, S KHURANA, KK POLANSKEY, C SOUTHWOOD, DJ WALKER, RJ AF KIVELSON, MG WANG, Z JOY, S KHURANA, KK POLANSKEY, C SOUTHWOOD, DJ WALKER, RJ BE Coates, AJ TI SOLAR-WIND INTERACTION WITH SMALL BODIES .2. WHAT CAN GALILEOS DETECTION OF MAGNETIC ROTATIONS TELL US ABOUT GASPRA AND IDA SO COMPARATIVE STUDIES OF MAGNETOSPHERIC PHENOMENA SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT D1 Symposium of COSPAR Scientific Commission D, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP COMM SPACE RES, INT UNION GEODESY & GEOPHYS, INT ASSOC GEOMAGNETISM & AERON, SCI COMM SOLAR TERRESTRIAL PHYS AB As the Galileo spacecraft passed the asteroids Gaspra in 1990 and Ida in 1993, the magnetometer recorded changes in the solar wind magnetic field that we associate with the presence of the nearby body. This paper focuses on the types of interactions that can produce perturbations in the solar wind. We have suggested that the interaction at Gaspra is consistent with expectations of flow diversion by a magnetic dipole moment and an associated ''magnetosphere'' whose scale size is much larger than the diameter of the solid body. The conditions for the Ida flyby leave more room for ambiguity. The observations could plausibly be related to either interaction with a magnetized body or with a conducting body. We will report on details of the observations that may enable us to distinguish between the different types of interaction and to provide quantitative estimates of the physical properties of the asteroids themselves. C1 UNIV CALIF LOS ANGELES,DEPT EARTH & SPACE SCI,LOS ANGELES,CA 90024. JET PROPULS LAB,PASADENA,CA. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,LONDON,ENGLAND. RP KIVELSON, MG (reprint author), UNIV CALIF LOS ANGELES,INST GEOPHYS & PLANETARY PHYS,LOS ANGELES,CA 90024, USA. RI Kivelson, Margaret/I-9019-2012 OI Kivelson, Margaret/0000-0003-3859-8581 NR 9 TC 11 Z9 11 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042624-7 J9 ADV SPACE RES PY 1995 VL 16 IS 4 BP 59 EP 68 DI 10.1016/0273-1177(95)00209-W PG 10 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC67G UT WOS:A1995BC67G00010 ER PT B AU BUTLER, RW CALDWELL, JL CARRENO, VA HOLLOWAY, CM MINER, PS DIVITO, BL AF BUTLER, RW CALDWELL, JL CARRENO, VA HOLLOWAY, CM MINER, PS DIVITO, BL GP IEEE TI NASA Langley's research and technology-transfer program in formal methods SO COMPASS '95 - PROCEEDINGS OF THE TENTH ANNUAL CONFERENCE ON COMPUTER ASSURANCE: SYSTEMS INTEGRITY, SOFTWARE SAFETY, PROCESSES SECURITY, FORMAL METHODS LA English DT Proceedings Paper CT 10th Annual Conference on Computer Assurance - Systems Integrity, Software Safety, Processes Security, Formal Methods (COMPASS 95) CY JUN 25-29, 1995 CL NIST, GAITHERSBURG, MD SP IEEE, Aerosp & Electr Syst Soc, IEEE, Natl Capital Area Council, Brit Comp Soc, Arca Syst Inc, Comp Associates, CSA Inc, Intermetrics Inc, Logicon Inc, Kaman Sci Corp, NIST, USN, Naval Res Lab, Space & Naval Warfare syst Command, SRI Int, Syst Safety Soc HO NIST C1 NASA,LANGLEY RES CTR,HAMPTON,VA 23665. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2681-4 PY 1995 BP 135 EP 149 DI 10.1109/CMPASS.1995.521893 PG 15 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BD81C UT WOS:A1995BD81C00012 ER PT B AU BERGMAN, LA AF BERGMAN, LA GP IEEE, COMP SOC TI GIGABIT SATELLITES IN DISTRIBUTED SUPERCOMPUTING FOR GLOBAL RESEARCH SO COMPCON '95 - TECHNOLOGIES FOR THE INFORMATION SUPERHIGHWAY, DIGEST OF PAPERS LA English DT Proceedings Paper CT 40th Annual IEEE Computer-Society International Computer Conference - Technologies for the Information Superhighway (COMPCON 95) CY MAR 05-09, 1995 CL SAN FRANCISCO, CA SP IEEE, COMP SOC C1 JET PROP LAB,PASADENA,CA 91109. 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 0-7803-2657-1 PY 1995 BP 71 EP 76 PG 6 WC Computer Science, Hardware & Architecture; Computer Science, Information Systems; Computer Science, Software Engineering; Computer Science, Theory & Methods; Telecommunications SC Computer Science; Telecommunications GA BC87K UT WOS:A1995BC87K00012 ER PT J AU NOOR, AK STARNES, JH PETERS, SM AF NOOR, AK STARNES, JH PETERS, SM TI THERMOMECHANICAL POSTBUCKLING OF MULTILAYERED COMPOSITE PANELS WITH CUTOUTS SO COMPOSITE STRUCTURES LA English DT Article ID REDUCED BASIS TECHNIQUE; PLATES; HOLE AB The results of a study of the detailed thermomechanical postbuckling response characteristics of flat unstiffened composite panels with central circular cutouts are presented. The panels are subjected to combined temperature changes and applied edge loading (or edge displacements). The analysis is based on a first-order shear deformation plate theory. A mixed formulation is used with the fundamental unknowns consisting of the generalized displacements and the stress resultants of the plate. The postbuckling displacements, transverse shear stresses, transverse shear strain energy density, and their sensitivity coefficients are evaluated. The sensitivity coefficients measure the sensitivity of the postbuckling response to variations in the different lamination and material parameters of the panel. Numerical results are presented showing the effects of the variations in the hole diameter, laminate stacking sequence, fiber orientation, and aspect ratio of the panel on the thermomechanical postbuckling response and its sensitivity to changes in panel parameters. C1 NASA,LANGLEY RES CTR,HAMPTON,VA 23681. RP NOOR, AK (reprint author), UNIV VIRGINIA,CTR COMPUTAT STRUCT TECHNOL,CHARLOTTESVILLE,VA 22903, USA. NR 21 TC 4 Z9 4 U1 1 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0263-8223 J9 COMPOS STRUCT JI Compos. Struct. PY 1995 VL 30 IS 4 BP 369 EP 388 DI 10.1016/0263-8223(94)00055-7 PG 20 WC Materials Science, Composites SC Materials Science GA QL537 UT WOS:A1995QL53700002 ER PT J AU REZAEEPAZHAND, J SIMITSES, GJ STARNES, JH AF REZAEEPAZHAND, J SIMITSES, GJ STARNES, JH TI USE OF SCALED-DOWN MODELS FOR PREDICTING VIBRATION RESPONSE OF LAMINATED PLATES SO COMPOSITE STRUCTURES LA English DT Article AB An analytical investigation was undertaken to show how and to what extent similitude theory can be applied in the design of scaled-down models. Through similitude the necessary similarity conditions, referred to herein as scaling laws, pertaining to free vibrations of laminated plates are derived. Establishment of scaling laws, based on the direct use of the governing equations is discussed and their use in the design of models is presented. These scaling laws provide the relationships between structural geometric parameters and frequency response parameters of a scaled-down model and its prototype. Later, these conditions are used to design a model, the experimental data of which can be projected in order to predict the behavior of the prototype. Attention is focused on the use of models for the analysis of free vibrations of multilayered composite rectangular plates. Angle-ply and cross-ply symmetric configurations are chosen for investigation. This analytical study indicates that distorted models with a different number of layers, material properties, and geometries than those of the prototype can predict the behavior of the prototype with good accuracy. C1 NASA,LANGLEY RES CTR,HAMPTON,VA 23665. RP REZAEEPAZHAND, J (reprint author), UNIV CINCINNATI,DEPT AEROSP ENGN & ENGN MECH,CINCINNATI,OH 45221, USA. OI Rezaeepazhand, Jalil/0000-0003-3653-1623 NR 8 TC 23 Z9 28 U1 1 U2 4 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0263-8223 J9 COMPOS STRUCT JI Compos. Struct. PY 1995 VL 30 IS 4 BP 419 EP 426 DI 10.1016/0263-8223(94)00064-6 PG 8 WC Materials Science, Composites SC Materials Science GA QL537 UT WOS:A1995QL53700006 ER PT J AU ISHAI, O HIEL, C LUFT, M AF ISHAI, O HIEL, C LUFT, M TI LONG-TERM HYGROTHERMAL EFFECTS ON DAMAGE TOLERANCE OF HYBRID COMPOSITE SANDWICH PANELS SO COMPOSITES LA English DT Article DE SANDWICH PANELS; HYGROTHERMAL EXPOSURE; DAMAGE TOLERANCE ID MECHANICAL-BEHAVIOR; FOAM CORE AB A sandwich construction, composed of hybrid carbon-glass fibre-reinforced plastic skins and a syntactic foam core, was selected as the design concept for a wind tunnel compressor blade application, where high damage tolerance and durability are of major importance. Beam specimens were prepared from open-edge and encapsulated sandwich panels which had previously been immersed in water at different temperatures for periods of up to about two years in the extreme case. Moisture absorption and strength characteristics, as related to time of exposure to hygrothermal conditions, were evaluated for the sandwich specimens and their constituents (skins and foam). After different exposure periods, low-velocity impact damage was inflicted on most sandwich specimens and damage characteristics were related to impact energy. Eventually, the residual compressive strengths of the damaged (and undamaged) beams were determined flexurally. Test results show that exposure to hygrothermal conditions leads to significant strength reductions for foam specimens and open-edge sandwich panels, compared with reference specimens stored at room temperature. In the case of skin specimens and for beams prepared from encapsulated sandwich panels that had previously been exposed to hygrothermal conditions, moisture absorption was found to improve strength as related to the reference case. The beneficial effect of moisture on skin performance was, however, limited to moisture contents below 1% (at 50 degrees C and lower temperatures). Above this moisture level and at higher temperatures, strength degradation of the skin seems to prevail. C1 TECHNION ISRAEL INST TECHNOL,FAC MECH ENGN,IL-32000 HAIFA,ISRAEL. RP ISHAI, O (reprint author), NASA,AMES RES CTR,EEM BRANCH,MOFFETT FIELD,CA 94035, USA. NR 8 TC 32 Z9 32 U1 0 U2 7 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA LINACRE HOUSE JORDAN HILL, OXFORD, OXON, ENGLAND OX2 8DP SN 0010-4361 J9 COMPOSITES JI Composites PD JAN PY 1995 VL 26 IS 1 BP 47 EP 55 DI 10.1016/0010-4361(94)P3629-F PG 9 WC Materials Science, Composites SC Materials Science GA PW381 UT WOS:A1995PW38100008 ER PT J AU WANG, JT RAJU, IS SLEIGHT, DW AF WANG, JT RAJU, IS SLEIGHT, DW TI COMPOSITE SKIN-STIFFENER DEBOND ANALYSES USING FRACTURE-MECHANICS APPROACH WITH SHELL ELEMENTS SO COMPOSITES ENGINEERING LA English DT Article ID PANELS AB Fracture mechanics analyses of composite skin-stiffener debond configurations using shell elements are presented. Two types of debond configurations are studied: a flange skin strip debond configuration and a skin-stiffener debond configuration. The flange-skin strip configuration examines debond growth perpendicular to the stiffener while the skin-stiffener configuration examines debond growth parallel to the stiffener. Four-node and 9-node shell elements are used to model both debond configurations. The stiffener flange and skin are modeled as two different layers of elements whose translational degrees-of-freedom, in the bonded portion, of the corresponding flange and skin nodes are constrained to be identical. Strain energy release rate formulae are presented for both 4-node and 9-node element models based on the virtual crack closure technique (VCCT). In addition, average values of the strain energy release rates are calculated using a gradient method. The VCCT formulae and the gradient method are used to compute the strain energy release rates (G-values) for both debond configurations. The G-values predicted by these methods are compared with those predicted by plane-strain and 3D finite element analyses. Excellent correlation is obtained among all the analysis results, thus helping to validate the VCCT formulae derived for the 4- and 9-node shell elements. RP WANG, JT (reprint author), NASA,LANGLEY RES CTR,HAMPTON,VA 23681, USA. NR 20 TC 15 Z9 16 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0961-9526 J9 COMPOS ENG JI Compos. Eng. PY 1995 VL 5 IS 3 BP 277 EP 296 DI 10.1016/0961-9526(94)00097-S PG 20 WC Engineering, Multidisciplinary; Materials Science, Composites SC Engineering; Materials Science GA QW739 UT WOS:A1995QW73900003 ER PT J AU ABOUDI, J PINDERA, MJ ARNOLD, SM AF ABOUDI, J PINDERA, MJ ARNOLD, SM TI A COUPLED HIGHER-ORDER THEORY FOR FUNCTIONALLY GRADED COMPOSITES WITH PARTIAL HOMOGENIZATION SO COMPOSITES ENGINEERING LA English DT Article; Proceedings Paper CT 1st International Conference on Composites Engineering (ICCE/1) CY AUG 28-31, 1994 CL NEW ORLEANS, LA SP Int Community Composites Engn AB In a recent series of papers, the authors have shown that the currently employed micromechanics approach applied to functionally graded materials, based on the concept Of a representative volume element (RVE) assumed to exist at every point within the material, may produce erroneous results in the presence of macroscopically nonuniform material properties and large field variable gradients. As a result, a new higher-order theory for functionally graded materials has been developed that explicitly couples the microstructural and macrostructural effects, thereby providing both a rational methodology for analyzing the response of this new class of materials and a means for evaluating the uncoupled RVE-based micromechanics approach. Herein, the new theory is further generalized by combining it with a partial homogenization scheme applied along the nonfunctionally graded directions, while preserving the elements of micro-macrostructural coupling along the graded direction. As a practical consequence, composite plates functionally graded in the through-thickness direction and subjected to a thermal gradient along the same direction can now be analyzed in the presence of imposed average normal stresses in the nongraded inplane directions. Examples dealing with such composite plates are presented that illustrate the effect of partial homogenization on the internal stress fields and inplane moment resultants. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RP ABOUDI, J (reprint author), UNIV VIRGINIA,CHARLOTTESVILLE,VA 22903, USA. NR 15 TC 22 Z9 24 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0961-9526 J9 COMPOS ENG JI Compos. Eng. PY 1995 VL 5 IS 7 BP 771 EP 792 DI 10.1016/0961-9526(95)00032-I PG 22 WC Engineering, Multidisciplinary; Materials Science, Composites SC Engineering; Materials Science GA RK601 UT WOS:A1995RK60100004 ER PT J AU GOLDBERG, RK HOPKINS, DA AF GOLDBERG, RK HOPKINS, DA TI THERMAL-ANALYSIS OF A FUNCTIONALLY GRADED MATERIAL SUBJECT TO A THERMAL-GRADIENT USING THE BOUNDARY-ELEMENT METHOD SO COMPOSITES ENGINEERING LA English DT Article; Proceedings Paper CT 1st International Conference on Composites Engineering (ICCE/1) CY AUG 28-31, 1994 CL NEW ORLEANS, LA SP Int Community Composites Engn ID FIBER AB The boundary element method is utilized in this study to conduct thermal analyses of functionally graded composites, materials in which the internal microstructure of properties are explicitly tailored in order to obtain an optimal response, on the micromechanical (constituent) scale. A unique feature of the boundary element formulations used here is the use of circular shape functions to convert the two-dimensional integrations of the composite fibers to one-dimensional integrations. Using the computer code BEST-CMS, the through the thickness temperature profiles are computed for a representative material with varying numbers of fibers and fiber spacing in the thickness direction. The computed temperature profiles are compared to those obtained using an alternative analytical theory which explicitly couples the heterogeneous microstructure to the global analysis. The boundary element results compared favorably to the analytical calculations, with discrepancies that are explainable based on the boundary element formulation. The results serve both to demonstrate the ability of the boundary element method to analyze these types of materials, and to verify the accuracy of the analytical theory. RP GOLDBERG, RK (reprint author), NASA,LEWIS RES CTR,CLEVELAND,OH 44135, USA. NR 11 TC 14 Z9 15 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0961-9526 J9 COMPOS ENG JI Compos. Eng. PY 1995 VL 5 IS 7 BP 793 EP 806 DI 10.1016/0961-9526(95)00030-Q PG 14 WC Engineering, Multidisciplinary; Materials Science, Composites SC Engineering; Materials Science GA RK601 UT WOS:A1995RK60100005 ER PT J AU PINDERA, MJ ABOUDI, J ARNOLD, SM JONES, WF AF PINDERA, MJ ABOUDI, J ARNOLD, SM JONES, WF TI USE OF COMPOSITES IN MULTI-PHASED AND FUNCTIONALLY GRADED MATERIALS SO COMPOSITES ENGINEERING LA English DT Editorial Material C1 TEL AVIV UNIV,FAC ENGN,IL-69978 RAMAT AVIV,ISRAEL. NASA,LEWIS RES CTR,CLEVELAND,OH 44135. USAF,OFF SCI RES,BOLLING AFB,DC. RP PINDERA, MJ (reprint author), UNIV VIRGINIA,DEPT CIVIL ENGN & APPL MECH,CHARLOTTESVILLE,VA 22903, USA. NR 0 TC 3 Z9 3 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0961-9526 J9 COMPOS ENG JI Compos. Eng. PY 1995 VL 5 IS 7 BP R7 EP R9 DI 10.1016/0961-9526(95)90007-1 PG 3 WC Engineering, Multidisciplinary; Materials Science, Composites SC Engineering; Materials Science GA RK601 UT WOS:A1995RK60100001 ER PT J AU IFJU, PG MASTERS, JE JACKSON, WC AF IFJU, PG MASTERS, JE JACKSON, WC TI THE USE OF MOIRE INTERFEROMETRY AS AN AID TO STANDARD TEST-METHOD DEVELOPMENT FOR TEXTILE COMPOSITE-MATERIALS SO COMPOSITES SCIENCE AND TECHNOLOGY LA English DT Article DE MOIRE INTERFEROMETRY; TEXTILE COMPOSITES; SHEAR TESTING; INTERLAMINAR TENSILE STRENGTH; OPEN-HOLE TENSION AB The viability of advanced textile composites as an efficient aircraft material is currently being addressed in the NASA Advanced Composites Technology (ACT) Program. One of the expected milestones of the program is to develop standard test methods for these complex material systems. Current test methods for laminated composites may not be optimum for textile composites, since the architecture of the textile induces non-uniform deformation characteristics on the scab of the smallest repeating unit of the architecture. The smallest repeating unit, also called the unit cell, is often larger than the strain gages used for testing of tape composites. As a result, extending laminated composite test practices to textiles can often lead to pronounced scatter in material property measurements. It has been speculated that the fiber architectures produce significant surface strain non-uniformities, however, the magnitudes were not well understood. Moire interferometry, characterized by full-field information high-displacement sensitivity, and high spatial resolution, is well suited to document the surface strain on textile composites. Studies at the NASA Langley Research Center on a variety of textile architectures including 2D braids and 3D weaves, has evidenced the merits of using moire interferometry to guide in test method development for textile composites. Moire interferometry was used to support tensile testing by validating instrumentation practices and documenting damage mechanisms. It was used to validate shear test methods by mapping the full-field deformation of shear specimens and to validate open-hole tension experiments to determine the strain concentration and compare them to numeric predictions. It was used for through-the-thickness tensile strength test method development, to verify capabilities for testing of both 2D and 3D material systems. For all of these examples, moire interferometry provided vision so that test methods could be developed with less speculation and more documentation. C1 LOCKHEED ENGN & SCI CO,HAMPTON,VA 23665. NASA,LANGLEY RES CTR,MECH MAT BRANCH,HAMPTON,VA 23665. RP IFJU, PG (reprint author), UNIV FLORIDA,DEPT AEROSP ENGN MECH & ENGN SCI,GAINESVILLE,FL 32611, USA. NR 9 TC 24 Z9 24 U1 1 U2 5 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0266-3538 J9 COMPOS SCI TECHNOL JI Compos. Sci. Technol. PY 1995 VL 53 IS 2 BP 155 EP 163 DI 10.1016/0266-3538(95)00014-3 PG 9 WC Materials Science, Composites SC Materials Science GA QX816 UT WOS:A1995QX81600005 ER PT S AU NEUDECK, PG AF NEUDECK, PG BE Goronkin, H Mishra, U TI PROGRESS TOWARDS HIGH-TEMPERATURE, HIGH-POWER SIC DEVICES SO COMPOUND SEMICONDUCTORS 1994 SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article; Proceedings Paper CT 21st International Symposium on Compound Semiconductors CY SEP 18-22, 1994 CL SAN DIEGO, CA ID SILICON-CARBIDE; GROWTH AB Silicon carbide's demonstrated ability to function under extreme high-temperature, high-power, and/or high-radiation conditions is expected to enable significant enhancements to a far-ranging variety of applications and systems. However, improvements in crystal growth and device fabrication processes are needed before SiC-based devices and circuits can be scaled-up and reliably incorporated into electronic systems. This paper surveys the present status of SiC-based semiconductor electronics within the context of identifying areas where technological maturation is most needed, and speculating on the prospects for resolution of crucial technological obstacles. Recent achievements include the monolithic realization of SiC integrated circuit operational amplifiers and digital logic circuits,: as well as significant improvements to epitaxial and bulk crystal growth processes that will impact the overall viability of this rapidly emerging technology. RP NEUDECK, PG (reprint author), NASA,LEWIS RES CTR,MS 77-1,21000 BROOKPK RD,CLEVELAND,OH 44135, USA. NR 38 TC 2 Z9 2 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 BN 0-7503-0226-7 J9 INST PHYS CONF SER PY 1995 IS 141 BP 1 EP 6 PG 6 WC Crystallography; Engineering, Electrical & Electronic; Materials Science, Characterization & Testing; Physics, Multidisciplinary; Physics, Condensed Matter SC Crystallography; Engineering; Materials Science; Physics GA BC92S UT WOS:A1995BC92S00001 ER PT S AU LEWIS, JH SPENCER, MG GRIFFIN, JA ZHANG, DP GRUNTHANER, F GEORGE, T AF LEWIS, JH SPENCER, MG GRIFFIN, JA ZHANG, DP GRUNTHANER, F GEORGE, T BE Goronkin, H Mishra, U TI (INAS)(1)/(GAAS)(4) SHORT-PERIOD STRAINED-LAYER SUPERLATTICES GROWN BY MOLECULAR-BEAM EPITAXY SO COMPOUND SEMICONDUCTORS 1994 SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article; Proceedings Paper CT 21st International Symposium on Compound Semiconductors CY SEP 18-22, 1994 CL SAN DIEGO, CA AB We present a study of the effects of growth conditions on the transport properties of (InAs)(1)/(GaAs)(4) short period strained layer superlattices (SPSLSL's) grown on (100) GaAs substrates. The superlattices were grown at substrate temperatures of 420, 480, and 520 degrees C, and under various arsenic beam equivalent pressures (BEP). Reflection high energy electron diffraction (RHEED) observations along the [110] azimuth were made to determine the growth mode [i.e. two-dimensional (2D) or three-dimensional growth (3D)], and set the growth conditions. Under optimum growth conditions, RHEED oscillations of an 80-period (InAs)(1)/(GaAs)(4) superlattice were obtained. Two-dimensional electron gas (2DEG) mobilities of 7,600 cm(2)/V . s at 300 degrees K and 43,000 cm(2)/V . s at 77 degrees K have been obtained for high electron mobility transistor (HEMT) structures fabricated on 8-period (InAs)(1)/(GaAs)(4) superlattices. To our knowledge, this 77 degrees K value represents the highest mobility obtained for (InAs)(1)/(GaAs)(4) SPSLSL superlattices. C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. RP LEWIS, JH (reprint author), HOWARD UNIV,SCH ENGN,MAT SCI RES CTR EXCELLENCE,WASHINGTON,DC 20059, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 BN 0-7503-0226-7 J9 INST PHYS CONF SER PY 1995 IS 141 BP 167 EP 172 PG 6 WC Crystallography; Engineering, Electrical & Electronic; Materials Science, Characterization & Testing; Physics, Multidisciplinary; Physics, Condensed Matter SC Crystallography; Engineering; Materials Science; Physics GA BC92S UT WOS:A1995BC92S00030 ER PT B AU TEMKIN, A WEATHERFORD, CA AF TEMKIN, A WEATHERFORD, CA BE Huo, WM Gianturco, FA TI THE (NON-ITERATIVE)PARTIAL DIFFERENTIAL EQUATION METHOD - APPLICATION TO ELECTRON-MOLECULE SCATTERING SO COMPUTATIONAL METHODS FOR ELECTRON-MOLECULE COLLISIONS LA English DT Proceedings Paper CT Workshop on Comparative Study of Current Methodologies in Electron-Molecule Scattering CY MAR 11-13, 1993 CL HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS, CAMBRIDGE, MA SP HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS HO HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. NR 0 TC 3 Z9 3 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44911-0 PY 1995 BP 191 EP 212 PG 22 WC Physics, Atomic, Molecular & Chemical SC Physics GA BD02D UT WOS:A1995BD02D00007 ER PT B AU HUO, WM AF HUO, WM BE Huo, WM Gianturco, FA TI THE SCHWINGER VARIATIONAL METHOD SO COMPUTATIONAL METHODS FOR ELECTRON-MOLECULE COLLISIONS LA English DT Proceedings Paper CT Workshop on Comparative Study of Current Methodologies in Electron-Molecule Scattering CY MAR 11-13, 1993 CL HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS, CAMBRIDGE, MA SP HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS HO HARVARD SMITHSONIAN CTR ASTROPHYS, INST THEORET ATOM & MOLEC PHYS C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. NR 0 TC 5 Z9 5 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44911-0 PY 1995 BP 327 EP 355 PG 29 WC Physics, Atomic, Molecular & Chemical SC Physics GA BD02D UT WOS:A1995BD02D00015 ER PT J AU GREENSTADT, J AF GREENSTADT, J TI THE REMOVAL OF OVERSHOOT IN PDE SOLUTIONS BY THE USE OF SPECIAL BASIS FUNCTIONS SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING LA English DT Article ID PARTIAL-DIFFERENTIAL EQUATIONS; CELL DISCRETIZATION AB The Cell Discretization algorithm is applied in a straightforward manner to a few boundary value problems whose solutions are singular in one way or another. When attempts are made to solve problems of this sort with simple analytic basis functions (e.g. polynomials, trigonometric functions), the result is an erratic oscillation usually called overshoot, ringing or the Gibbs phenomenon. When the singularities are explicitly incorporated into the representation of the solution, the irregularity can be completely eliminated. The examples chosen for this study are: (1) a Dirichlet problem with a jump in the boundary data at a corner, (2) a convection-diffusion problem with a boundary-value jump at a corner, (3) a convection-diffusion problem with steep boundary layers, (4) a vibrating membrane problem with a re-entrant corner, (5) a problem with a change from Dirichlet to Neumann boundary conditions on the same boundary face (Motz's problem). Copious figures illustrate the results. RP GREENSTADT, J (reprint author), NASA,AMES RES CTR,MOFFETT FIELD,CA, USA. NR 10 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 0045-7825 J9 COMPUT METHOD APPL M JI Comput. Methods Appl. Mech. Eng. PD JAN PY 1995 VL 120 IS 1-2 BP 45 EP 64 DI 10.1016/0045-7825(94)00049-S PG 20 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications; Mechanics SC Engineering; Mathematics; Mechanics GA QG656 UT WOS:A1995QG65600003 ER PT J AU CAYLOR, IJ CHANDRASEKAR, V AF CAYLOR, IJ CHANDRASEKAR, V GP AMER METEOROL SOC TI Radar observations of time varying ice crystal orientation in Florida thunderstorms SO CONFERENCE ON CLOUD PHYSICS LA English DT Proceedings Paper CT Conference on Cloud Physics, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc, World Meteorol Org C1 NASA,GODDARD SPACE FLIGHT CTR,MESOSCALE DYNAM & PRECIPITAT BRANCH,SCI SYST & APPLICAT INC,GREENBELT,MD 20771. 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 4 EP 7 PG 4 WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Geology; Meteorology & Atmospheric Sciences GA BD28V UT WOS:A1995BD28V00002 ER PT J AU ACKERMAN, AS TOON, OB AF ACKERMAN, AS TOON, OB GP AMER METEOROL SOC TI Microphysical modeling of marine stratocumulus: Challenges and prospects SO CONFERENCE ON CLOUD PHYSICS LA English DT Proceedings Paper CT Conference on Cloud Physics, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc, World Meteorol Org C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. 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 159 EP 159 PG 1 WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Geology; Meteorology & Atmospheric Sciences GA BD28V UT WOS:A1995BD28V00035 ER PT J AU CONSIDINE, GD CURRY, JA AF CONSIDINE, GD CURRY, JA GP AMER METEOROL SOC TI Statistical dynamical modeling of cloud droplet spectra SO CONFERENCE ON CLOUD PHYSICS LA English DT Proceedings Paper CT Conference on Cloud Physics, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc, World Meteorol Org C1 NASA,LANGLEY RES CTR,HAMPTON,VA. 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 206 EP 209 PG 4 WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Geology; Meteorology & Atmospheric Sciences GA BD28V UT WOS:A1995BD28V00047 ER PT B AU TAO, WK SCALA, J FERRIER, B SIMPSON, J AF TAO, WK SCALA, J FERRIER, B SIMPSON, J GP AMER METEOROL SOC TI The effect of melting processes on the development of a tropics and a midlatitude squall line SO CONFERENCE ON CLOUD PHYSICS LA English DT Proceedings Paper CT Conference on Cloud Physics, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc, World Meteorol Org C1 NASA,GODDARD SPACE FLIGHT CTR,ATMOSPHERES LAB,MESOSCALE DYNAM & PRECIPITAT BRANCH CODE 912,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1995 BP 231 EP 231 PG 1 WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Geology; Meteorology & Atmospheric Sciences GA BD28V UT WOS:A1995BD28V00053 ER PT B AU ATLAS, D MATROSOV, SY HEYMSFIELD, AJ WOLFF, DB AF ATLAS, D MATROSOV, SY HEYMSFIELD, AJ WOLFF, DB GP AMER METEOROL SOC TI Radar and radiation properties of ice clouds SO CONFERENCE ON CLOUD PHYSICS LA English DT Proceedings Paper CT Conference on Cloud Physics, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc, World Meteorol Org C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. 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 246 EP 251 PG 6 WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Geology; Meteorology & Atmospheric Sciences GA BD28V UT WOS:A1995BD28V00057 ER PT J AU TOKAY, A SHORT, DA THIELE, OW AF TOKAY, A SHORT, DA THIELE, OW GP AMER METEOROL SOC TI Convective vs stratiform rain over Kapingamarangi Atoll during TOGA COARE: Evidence from raindrop spectra SO CONFERENCE ON CLOUD PHYSICS LA English DT Proceedings Paper CT Conference on Cloud Physics, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc, World Meteorol Org C1 NASA,GODDARD SPACE FLIGHT CTR,TRMM OFF,GREENBELT,MD 20771. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1995 BP 252 EP 257 PG 6 WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Geology; Meteorology & Atmospheric Sciences GA BD28V UT WOS:A1995BD28V00058 ER PT J AU ROSSOW, WB AF ROSSOW, WB GP AMER METEOROL SOC TI Another look at the seasonal variation of polar cloudiness with satellite and surface observations SO CONFERENCE ON CLOUD PHYSICS LA English DT Proceedings Paper CT Conference on Cloud Physics, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc, World Meteorol Org C1 NASA,GODDARD INST SPACE STUDIES,NEW YORK,NY 10025. 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 591 EP 594 PG 4 WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Geology; Meteorology & Atmospheric Sciences GA BD28V UT WOS:A1995BD28V00133 ER PT J AU KUMAR, P JASINSKI, MF WETZEL, PJ ENGMAN, ET AF KUMAR, P JASINSKI, MF WETZEL, PJ ENGMAN, ET GP AMER METEOROL SOC TI Feasibility of improving MMS evapotranspiration flux using dynamic landsurface hydrology SO CONFERENCE ON HYDROLOGY LA English DT Proceedings Paper CT Conference on Hydrology, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. 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 46 EP 47 PG 2 WC Meteorology & Atmospheric Sciences; Water Resources SC Meteorology & Atmospheric Sciences; Water Resources GA BD28W UT WOS:A1995BD28W00012 ER PT J AU TOKAY, A SHORT, DA KUCERA, PA THIELE, OW AF TOKAY, A SHORT, DA KUCERA, PA THIELE, OW GP AMER METEOROL SOC TI On the consistency of radar Z-R relations with parameterizations of the raindrop size distribution SO CONFERENCE ON HYDROLOGY LA English DT Proceedings Paper CT Conference on Hydrology, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc C1 NASA,GODDARD SPACE FLIGHT CTR,TRMM OFF,GREENBELT,MD 20771. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1995 BP 62 EP 67 PG 6 WC Meteorology & Atmospheric Sciences; Water Resources SC Meteorology & Atmospheric Sciences; Water Resources GA BD28W UT WOS:A1995BD28W00017 ER PT J AU FITZJARRALD, D ROBERTSON, F BARRON, E CHRISTY, J POLLARD, D THOMPSON, S AF FITZJARRALD, D ROBERTSON, F BARRON, E CHRISTY, J POLLARD, D THOMPSON, S GP AMER METEOROL SOC TI The scale and persistence of soil moisture anomalies as simulated in a global model SO CONFERENCE ON HYDROLOGY LA English DT Proceedings Paper CT Conference on Hydrology, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. 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 111 EP 114 PG 4 WC Meteorology & Atmospheric Sciences; Water Resources SC Meteorology & Atmospheric Sciences; Water Resources GA BD28W UT WOS:A1995BD28W00029 ER PT J AU ENGMAN, ET AF ENGMAN, ET GP AMER METEOROL SOC TI Hydrology in the twentieth century SO CONFERENCE ON HYDROLOGY LA English DT Proceedings Paper CT Conference on Hydrology, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc C1 NASA,GODDARD SPACE FLIGHT CTR,HYDROL SCI BRANCH,GREENBELT,MD 20771. 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 194 EP 194 PG 1 WC Meteorology & Atmospheric Sciences; Water Resources SC Meteorology & Atmospheric Sciences; Water Resources GA BD28W UT WOS:A1995BD28W00049 ER PT S AU BECHTEL, RT HALL, DK AF BECHTEL, RT HALL, DK BE ElGenk, MS Whitten, RP TI THRUST VECTOR CONTROL USING ELECTRIC ACTUATION SO CONFERENCE ON NASA CENTERS FOR COMMERCIAL DEVELOPMENT OF SPACE (NASA CCDS) SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Conference on NASA Centers for Commercial Development of Space - Commercialization and Technology Transfer CY JAN 08-12, 1995 CL ALBUQUERQUE, NM SP UNIV NEW MEXICO, INST SPACE & NUCL POWER STUDIES, BALLIST MISSILE DEF ORG, NASA HEADQUARTERS, LEWIS RES CTR, US DOE, LOS ALAMOS NATL LAB, US DOE, SANDIA NATL LABS, USAF, PHILLIPS LAB, USAF, WRIGHT LAB C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-431-7 J9 AIP CONF PROC PY 1995 IS 325 BP 161 EP 166 PG 6 WC Automation & Control Systems; Engineering, Aerospace; Materials Science, Multidisciplinary; Remote Sensing SC Automation & Control Systems; Engineering; Materials Science; Remote Sensing GA BC82S UT WOS:A1995BC82S00023 ER PT S AU GOEL, N PANT, A SERA, G AF GOEL, N PANT, A SERA, G BE ElGenk, MS Whitten, RP TI COMMERCIALIZATION OF PROTON EXCHANGE MEMBRANE (PEM) FUEL CELL TECHNOLOGY SO CONFERENCE ON NASA CENTERS FOR COMMERCIAL DEVELOPMENT OF SPACE (NASA CCDS) SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Conference on NASA Centers for Commercial Development of Space - Commercialization and Technology Transfer CY JAN 08-12, 1995 CL ALBUQUERQUE, NM SP UNIV NEW MEXICO, INST SPACE & NUCL POWER STUDIES, BALLIST MISSILE DEF ORG, NASA HEADQUARTERS, LEWIS RES CTR, US DOE, LOS ALAMOS NATL LAB, US DOE, SANDIA NATL LABS, USAF, PHILLIPS LAB, USAF, WRIGHT LAB C1 TEXAS A&M UNIV SYST,TEXAS ENGN EXTENS SERV,NASA,MID CONTINENT TECHNOL TRANSFER CTR,COLLEGE STN,TX 77843. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-431-7 J9 AIP CONF PROC PY 1995 IS 325 BP 243 EP 248 PG 6 WC Automation & Control Systems; Engineering, Aerospace; Materials Science, Multidisciplinary; Remote Sensing SC Automation & Control Systems; Engineering; Materials Science; Remote Sensing GA BC82S UT WOS:A1995BC82S00034 ER PT S AU ERICKSON, JD BARTA, DJ DRAGG, JL ECKELKAMP, RE AF ERICKSON, JD BARTA, DJ DRAGG, JL ECKELKAMP, RE BE ElGenk, MS Whitten, RP TI AUTOMATION AND ROBOTICS REQUIREMENTS FOR ADVANCED LIFE SUPPORT SYSTEMS IN COMMERCIAL SPACE ACTIVITIES SO CONFERENCE ON NASA CENTERS FOR COMMERCIAL DEVELOPMENT OF SPACE (NASA CCDS) SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Conference on NASA Centers for Commercial Development of Space - Commercialization and Technology Transfer CY JAN 08-12, 1995 CL ALBUQUERQUE, NM SP UNIV NEW MEXICO, INST SPACE & NUCL POWER STUDIES, BALLIST MISSILE DEF ORG, NASA HEADQUARTERS, LEWIS RES CTR, US DOE, LOS ALAMOS NATL LAB, US DOE, SANDIA NATL LABS, USAF, PHILLIPS LAB, USAF, WRIGHT LAB C1 NASA,LYNDON B JOHNSON SPACE CTR,DIV AUTOMAT & ROBOT,HOUSTON,TX 77058. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-431-7 J9 AIP CONF PROC PY 1995 IS 325 BP 299 EP 304 PG 6 WC Automation & Control Systems; Engineering, Aerospace; Materials Science, Multidisciplinary; Remote Sensing SC Automation & Control Systems; Engineering; Materials Science; Remote Sensing GA BC82S UT WOS:A1995BC82S00040 ER PT S AU SALOMONSON, VV IRONS, JR WILLIAMS, DL AF SALOMONSON, VV IRONS, JR WILLIAMS, DL BE ElGenk, MS Whitten, RP TI THE FUTURE OF LANDSAT - IMPLICATIONS FOR COMMERCIAL DEVELOPMENT SO CONFERENCE ON NASA CENTERS FOR COMMERCIAL DEVELOPMENT OF SPACE (NASA CCDS) SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Conference on NASA Centers for Commercial Development of Space - Commercialization and Technology Transfer CY JAN 08-12, 1995 CL ALBUQUERQUE, NM SP UNIV NEW MEXICO, INST SPACE & NUCL POWER STUDIES, BALLIST MISSILE DEF ORG, NASA HEADQUARTERS, LEWIS RES CTR, US DOE, LOS ALAMOS NATL LAB, US DOE, SANDIA NATL LABS, USAF, PHILLIPS LAB, USAF, WRIGHT LAB C1 NASA,GODDARD SPACE FLIGHT CTR,EARTH SCI DIRECTORATE,GREENBELT,MD 20771. RI Irons, James/D-8535-2012 NR 0 TC 1 Z9 1 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-431-7 J9 AIP CONF PROC PY 1995 IS 325 BP 353 EP 359 PG 7 WC Automation & Control Systems; Engineering, Aerospace; Materials Science, Multidisciplinary; Remote Sensing SC Automation & Control Systems; Engineering; Materials Science; Remote Sensing GA BC82S UT WOS:A1995BC82S00046 ER PT J AU KRISHNAKUMAR, E SRIVASTAVA, SK AF KRISHNAKUMAR, E SRIVASTAVA, SK TI IONIZATION CROSS-SECTIONS OF SILANE AND DISILANE BY ELECTRON-IMPACT SO CONTRIBUTIONS TO PLASMA PHYSICS LA English DT Article ID ATOMS AB Partial ionization cross sections for silane and disilane by electron impact have been measured for electron energies in the range of threshold to 1000 eV using a crossed beam geometry and employing a pulsed electron beam and a pulsed ion extraction technique. The cross sections were normalized by using the relative flow technique. For ease of use in various plasma modeling we have fitted the cross sections to an empirical formula. C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 11 TC 37 Z9 37 U1 1 U2 3 PU AKADEMIE VERLAG GMBH PI BERLIN PA MUHLENSTRASSE 33-34, D-13187 BERLIN, GERMANY SN 0863-1042 J9 CONTRIB PLASM PHYS JI Contrib. Plasma Phys. PY 1995 VL 35 IS 4-5 BP 395 EP 404 DI 10.1002/ctpp.2150350407 PG 10 WC Physics, Fluids & Plasmas SC Physics GA TG618 UT WOS:A1995TG61800006 ER PT B AU KOLB, EW AF KOLB, EW BE Matthews, CN Varghese, A TI THE BIG BANG ORIGIN OF THE UNIVERSE SO COSMIC BEGINNINGS AND HUMAN ENDS: WHERE SCIENCE AND RELIGION MEET LA English DT Proceedings Paper CT Symposium on Science and Religion - Cosmic Beginning and Human Ends, at the 1993 Parliament of the Worlds Religions CY 1993 CL CHICAGO, IL C1 NASA,FERMI NATL ACCELERATOR LAB,FERMILAB ASTROPHYS GRP,BATAVIA,IL. NR 0 TC 0 Z9 0 U1 0 U2 0 PU OPEN COURT PUBL CO PI LA SALLE PA BOX 599, LA SALLE, IL 61301 BN 0-8126-9269-1 PY 1995 BP 55 EP 76 PG 22 WC History & Philosophy Of Science; Religion SC History & Philosophy of Science; Religion GA BC89F UT WOS:A1995BC89F00004 ER PT S AU WILSON, GR GILES, BL CHANDLER, MO AF WILSON, GR GILES, BL CHANDLER, MO BE Kozyra, JU Rasmussen, CE TI COLLISIONAL TO COLLISIONLESS ION OUTFLOW AT THE IONOSPHERE MAGNETOSPHERE INTERFACE SO COUPLING BETWEEN MAGNETOSPHERIC AND IONOSPHERIC PLASMAS SE ADVANCES IN SPACE RESEARCH-SERIES LA English DT Article; Proceedings Paper CT D2.2 Meeting of COSPAR Scientific Commission D and the C1.3 Meeting of COSPAR Scientific Commission C - Coupling Between Magnetospheric and Ionospheric Plasmas, at the 13th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res, Int Assoc Geomagnetism & Aeron ID POLAR WIND; TRANSITION REGION; MONTE-CARLO; MODEL; PLASMA; O+ AB Simple calculations show that ions in the ionosphere are collision dominated while ions in low density regions of the magnetosphere are collisionless. For the free outflow of light ions such as H+ and He+, this collisional-collisionless transition occurs in the region where the ions are accelerated by the charge separation electric field resulting from the steep gradient in the O+ density. In this case, specific distortions of the light ion velocity distributions are produced that significantly alter ion temperatures and heat flows. The types of nonMaxwellian velocity distributions seen are distributions with downward suprathermal tails, inverted bowl shaped distributions, and highly skewed distributions with large parallel or perpendicular heat flows. In addition, distributions with multiple peaks or one peak and an extended plateau also develop under some conditions. These various distributions are the result of relative flow between species, the v(-4) dependence of the Coulomb collision cross section, and altitude distributed sources of the ions. This paper presents results of studies of the evolution of the ion velocity distribution in the transition region done with a collisional semikinetic model combining the effects of large scale forces and field-aligned transport with the effects of ion-neutral and ion-ion collisions. Comparison of these results with data from the RIMS instrument on the DE 1 spacecraft suggest that these distributions have been seen and that additional processes, such as downward electric fields, may frequently be present on polar cap field lines. C1 UNIV ALABAMA, CTR SPACE PLASMA & AERON, HUNTSVILLE, AL 35899 USA. NASA, GEORGE C MARSHALL SPACE FLIGHT CTR, SPACE SCI LAB, HUNTSVILLE, AL 35812 USA. RP UNIV ALABAMA, DEPT PHYS, HUNTSVILLE, AL 35899 USA. NR 13 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0273-1177 BN 0-08-042654-9 J9 ADV SPACE RES-SERIES PY 1995 VL 17 IS 10 BP 155 EP 164 PG 10 WC Geosciences, Multidisciplinary; Physics, Fluids & Plasmas SC Geology; Physics GA BD63R UT WOS:A1995BD63R00021 ER PT S AU BANKOV, LG STANEV, GA VASSILEVA, AK KIROVA, VA DANOV, DL HANSON, WB HEELIS, RA ANDERSON, PC AF BANKOV, LG STANEV, GA VASSILEVA, AK KIROVA, VA DANOV, DL HANSON, WB HEELIS, RA ANDERSON, PC BE Kozyra, JU Rasmussen, CE TI A CASE-STUDY OF SUBAURORAL ION DRIFT VELOCITY JETS BY MEANS OF DYNAMICS EXPLORER-2 AND INTERCOSMOS BULGARIA-1300 SATELLITES DATA SO COUPLING BETWEEN MAGNETOSPHERIC AND IONOSPHERIC PLASMAS SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT D2.2 Meeting of COSPAR Scientific Commission D and the C1.3 Meeting of COSPAR Scientific Commission C - Coupling Between Magnetospheric and Ionospheric Plasmas, at the 13th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res, Int Assoc Geomagnetism & Aeron ID DIRECTED ELECTRIC-FIELDS; SUB-AURORAL LATITUDES; CONVECTION AB Satellites INTERCOSMOS ''Bulgaria-1300'' (ICE-1300) and Dynamics Explorer-2 (DE-2) were launched dose together early in August 1981. The satellite data base from both DE-2 and ICE-1300 covers almost a two years period. Data from both satellites were used to examine the longitudinal behavior of a few selected simultaneous subauroral ion drift (SAID) events in the late evening and earlier morning hours of magnetic local time (MLT). SAID velocity jets occur as a narrow region at the equatorward edge of the auroral oval in the westward direction in the evening hours, simultaneously in both hemispheres. It is shown, that the polward component of the DC electric field measured from ICE-1300 corresponds well to the ion drift velocity jets observed in the Ion Drift Meter (TDM) on DE-2 with some longitudinal extent of more than three hours MLT in the evening sector. In a specific case (orbit 705 of ICE-1300), we observe downward current associated with a SAID event of about 1.8 mu A/m(2), corresponding to the previously reported current measurements on DE-2 (orbit 796) of about 2.1 mu A/m(2). The simultaneous SAID observation taken in the earlier morning hours of the ion drift velocity distribution, shows an existence of velocity jets up to 0130 MLT. C1 BULGARIAN ACAD SCI, STIL, SOFIA, BULGARIA. UNIV TEXAS, CTR SPACE SCI, DALLAS, TX 75230 USA. NASA, GODDARD SPACE FLIGHT CTR, GREENBELT, MD 20771 USA. RP BANKOV, LG (reprint author), BULGARIAN ACAD SCI, INST SPACE RES, BU-1040 SOFIA, BULGARIA. RI Danov, Dimitar/O-1613-2016 OI Danov, Dimitar/0000-0002-1680-7859 NR 22 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 0-08-042654-9 J9 ADV SPACE RES PY 1995 VL 17 IS 10 BP 193 EP 200 PG 8 WC Geosciences, Multidisciplinary; Physics, Fluids & Plasmas SC Geology; Physics GA BD63R UT WOS:A1995BD63R00027 ER PT B AU SMEDLEY, GT ROSS, RG BERCHOWITZ, DM AF SMEDLEY, GT ROSS, RG BERCHOWITZ, DM BE Ross, RG TI PERFORMANCE CHARACTERIZATION OF THE SUNPOWER CRYOCOOLER SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,PASADENA,CA 91109. NR 0 TC 2 Z9 2 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44913-7 PY 1995 BP 149 EP 161 PG 13 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00016 ER PT B AU SPARR, L SARTOR, M BOYLE, R BANKS, S JAMES, E AF SPARR, L SARTOR, M BOYLE, R BANKS, S JAMES, E BE Ross, RG TI ADAPTATION OF TACTICAL CRYOCOOLERS FOR SHORT DURATION SPACE-FLIGHT MISSIONS SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 NASA,GODDARD SPACE FLIGHT CTR,CRYOGEN PROPULS & FLUID SYST BRANCH,GREENBELT,MD 20771. 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 0-306-44913-7 PY 1995 BP 163 EP 172 PG 10 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00017 ER PT B AU ROSS, RG AF ROSS, RG BE Ross, RG TI JPL CRYOCOOLER DEVELOPMENT AND TEST PROGRAM OVERVIEW SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,PASADENA,CA 91109. 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 0-306-44913-7 PY 1995 BP 173 EP 184 PG 12 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00018 ER PT B AU SMEDLEY, GT MON, GR JOHNSON, DL ROSS, RG AF SMEDLEY, GT MON, GR JOHNSON, DL ROSS, RG BE Ross, RG TI THERMAL PERFORMANCE OF STIRLING-CYCLE CRYOCOOLERS - A COMPARISON OF JPL-TESTED COOLERS SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,PASADENA,CA 91109. 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 0-306-44913-7 PY 1995 BP 185 EP 195 PG 11 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00019 ER PT B AU MON, GR SMEDLEY, GT JOHNSON, DL ROSS, RG AF MON, GR SMEDLEY, GT JOHNSON, DL ROSS, RG BE Ross, RG TI VIBRATION CHARACTERISTICS OF STIRLING CYCLE CRYOCOOLERS FOR SPACE APPLICATION SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,PASADENA,CA 91109. 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 0-306-44913-7 PY 1995 BP 197 EP 208 PG 12 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00020 ER PT B AU JOHNSON, DL SMEDLEY, GT MON, GR ROSS, RG NARVAEZ, P AF JOHNSON, DL SMEDLEY, GT MON, GR ROSS, RG NARVAEZ, P BE Ross, RG TI CRYOCOOLER ELECTROMAGNETIC COMPATIBILITY SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,PASADENA,CA 91109. NR 0 TC 1 Z9 2 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44913-7 PY 1995 BP 209 EP 220 PG 12 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00021 ER PT B AU SPARR, L SARTOR, M BOYLE, R CASTLES, S CYGNAROWICZ, T BANKS, S JAMNES, E ARILLO, V CORY, R AF SPARR, L SARTOR, M BOYLE, R CASTLES, S CYGNAROWICZ, T BANKS, S JAMNES, E ARILLO, V CORY, R BE Ross, RG TI NASA GSFC CRYOCOOLER TEST PROGRAM RESULTS FOR FY93-94 SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 NASA,GODDARD SPACE FLIGHT CTR,CRYOGEN PROPULS & FLUID SYST BRANCH,GREENBELT,MD 20771. 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 0-306-44913-7 PY 1995 BP 221 EP 232 PG 12 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00022 ER PT B AU LEE, JM KITTEL, P TIMMERHAUS, KD RADEBAUGH, R AF LEE, JM KITTEL, P TIMMERHAUS, KD RADEBAUGH, R BE Ross, RG TI STEADY SECONDARY MOMENTUM AND ENTHALPY STREAMING IN THE PULSE TUBE REFRIGERATOR SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. NR 0 TC 1 Z9 1 U1 0 U2 1 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44913-7 PY 1995 BP 359 EP 369 PG 11 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00037 ER PT B AU BOYLE, R SPARR, L GRUNER, T JAMES, E BANKS, S WILMOT, J ARILLO, V GIBBONEY, T AF BOYLE, R SPARR, L GRUNER, T JAMES, E BANKS, S WILMOT, J ARILLO, V GIBBONEY, T BE Ross, RG TI FLIGHT HARDWARE IMPLEMENTATION OF A FEED-FORWARD VIBRATION CONTROL SYSTEM FOR SPACE FLIGHT CRYOCOOLERS SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. 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 0-306-44913-7 PY 1995 BP 449 EP 454 PG 6 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00046 ER PT B AU GLASER, R ROSS, RG JOHNSON, DL AF GLASER, R ROSS, RG JOHNSON, DL BE Ross, RG TI STRV CRYOCOOLER TIP MOTION SUPPRESSION SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,APPL MECH TECHNOL SECT,PASADENA,CA 91109. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44913-7 PY 1995 BP 455 EP 463 PG 9 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00047 ER PT B AU BHANDARI, P RODRIGUEZ, J BARD, S WADE, L AF BHANDARI, P RODRIGUEZ, J BARD, S WADE, L BE Ross, RG TI DYNAMIC SIMULATION OF A PERIODIC 10-K SORPTION CRYOCOOLER SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,PASADENA,CA 91109. 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 0-306-44913-7 PY 1995 BP 581 EP 599 PG 19 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00059 ER PT B AU BARD, S WU, J KARLMANN, P COWGILL, P MIRATE, C RODRIGUEZ, J AF BARD, S WU, J KARLMANN, P COWGILL, P MIRATE, C RODRIGUEZ, J BE Ross, RG TI GROUND TESTING OF A 10-K SORPTION CRYOCOOLER FLIGHT EXPERIMENT (BETSCE) SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,PASADENA,CA 91109. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44913-7 PY 1995 BP 609 EP 621 PG 13 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00061 ER PT B AU BARD, S WU, J KARLMANN, P MIRATE, C WADE, L AF BARD, S WU, J KARLMANN, P MIRATE, C WADE, L BE Ross, RG TI COMPONENT RELIABILITY TESTING OF LONG-LIFE SORPTION CRYOCOOLERS SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,PASADENA,CA 91109. 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 0-306-44913-7 PY 1995 BP 623 EP 636 PG 14 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00062 ER PT B AU JOHNSON, DL ROSS, RG AF JOHNSON, DL ROSS, RG BE Ross, RG TI CRYOCOOLER COLDFINGER HEAT INTERCEPTOR SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,PASADENA,CA 91109. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44913-7 PY 1995 BP 709 EP 717 PG 9 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00070 ER PT B AU KITTEL, P AF KITTEL, P BE Ross, RG TI MODELING THERMAL CONTACT RESISTANCE SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. 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 0-306-44913-7 PY 1995 BP 755 EP 764 PG 10 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00074 ER PT B AU WADE, LA AF WADE, LA BE Ross, RG TI ACTIVE REFRIGERATION FOR SPACE ASTROPHYSICS MISSIONS SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,PASADENA,CA 91109. 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 0-306-44913-7 PY 1995 BP 845 EP 854 PG 10 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00083 ER PT B AU SUGIMURA, RS RUSSO, SC GILMAN, DC AF SUGIMURA, RS RUSSO, SC GILMAN, DC BE Ross, RG TI LESSONS LEARNED DURING THE INTEGRATION PHASE OF THE NASA IN-STEP CRYO-SYSTEM EXPERIMENT SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 JET PROP LAB,PASADENA,CA 91109. 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 0-306-44913-7 PY 1995 BP 869 EP 882 PG 14 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00085 ER PT B AU CAIRELLI, JE AF CAIRELLI, JE BE Ross, RG TI NASA ADVANCED REFRIGERATOR FREEZER TECHNOLOGY DEVELOPMENT PROJECT OVERVIEW SO CRYOCOOLERS 8 LA English DT Proceedings Paper CT 8th International Cryocooler Conference (Cryocoolers 8) CY JUN, 1994 CL VAIL, CO SP CALIF INST TECHNOL, JET PROPULS LAB C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. 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 0-306-44913-7 PY 1995 BP 919 EP 925 PG 7 WC Engineering, Aerospace; Engineering, Mechanical SC Engineering GA BD07G UT WOS:A1995BD07G00090 ER PT B AU LYONS, JJ HAYES, PA AF LYONS, JJ HAYES, PA BE Fischer, RE Smith, WJ TI High optical quality cryogenic hollow retroreflectors SO CURRENT DEVELOPMENTS IN OPTICAL DESIGN AND ENGINEERING V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Current Developments in Optical Design and Engineering V CY JUL 12-13, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE HOLLOW GLASS RETROREFLECTORS; 170 DEGREES KELVIN; CRYOGENIC C1 GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. 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 0-8194-1899-4 J9 P SOC PHOTO-OPT INS PY 1995 VL 2540 BP 94 EP 100 PG 7 WC Optics SC Optics GA BE15U UT WOS:A1995BE15U00011 ER PT B AU PARKER, JE LYONS, JJ AF PARKER, JE LYONS, JJ BE Fischer, RE Smith, WJ TI Development of optically flat mirrors using graphite/epoxy laminates SO CURRENT DEVELOPMENTS IN OPTICAL DESIGN AND ENGINEERING V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Current Developments in Optical Design and Engineering V CY JUL 12-13, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE COMPOSITE OPTICS; DIMENSIONAL STABILITY; LIGHT WEIGHT OPTICS C1 GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 3 Z9 3 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1899-4 J9 P SOC PHOTO-OPT INS PY 1995 VL 2540 BP 118 EP 124 PG 7 WC Optics SC Optics GA BE15U UT WOS:A1995BE15U00014 ER PT S AU MATHER, JC AF MATHER, JC BE Sanchez, N Zichichi, A TI The Big Bang and the infrared sky as seen by COBE SO CURRENT TOPICS IN ASTROFUNDAMENTAL PHYSICS: THE EARLY UNIVERSE SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on Current Topics in Astrofundamental Physics - The Early Universe CY SEP 04-16, 1994 CL ERICE, ITALY SP NATO, Sci Affairs Div C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3585-6 J9 NATO ADV SCI INST SE PY 1995 VL 467 BP 257 EP 276 PG 20 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BE15M UT WOS:A1995BE15M00007 ER PT S AU KOGUT, A AF KOGUT, A BE Sanchez, N Zichichi, A TI Spectrum of the cosmic microwave background: Results and prospects SO CURRENT TOPICS IN ASTROFUNDAMENTAL PHYSICS: THE EARLY UNIVERSE SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on Current Topics in Astrofundamental Physics - The Early Universe CY SEP 04-16, 1994 CL ERICE, ITALY SP NATO, Sci Affairs Div C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3585-6 J9 NATO ADV SCI INST SE PY 1995 VL 467 BP 277 EP 288 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BE15M UT WOS:A1995BE15M00008 ER PT S AU KOGUT, A AF KOGUT, A BE Sanchez, N Zichichi, A TI COBE DMR: Testing the initial conditions SO CURRENT TOPICS IN ASTROFUNDAMENTAL PHYSICS: THE EARLY UNIVERSE SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on Current Topics in Astrofundamental Physics - The Early Universe CY SEP 04-16, 1994 CL ERICE, ITALY SP NATO, Sci Affairs Div C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3585-6 J9 NATO ADV SCI INST SE PY 1995 VL 467 BP 313 EP 325 PG 13 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BE15M UT WOS:A1995BE15M00011 ER PT S AU BARING, MG AF BARING, MG BE Shapiro, MM Silberberg, R Wefel, JP TI COSMIC GAMMA-RAY BURSTS SO CURRENTS IN HIGH-ENERGY ASTROPHYSICS SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute/9th Course of the International School of Cosmic Ray Astrophysics on Currents in High-Energy Astrophysics CY MAY 07-18, 1994 CL ETTORE MAJORANA CTR, ERICE, ITALY SP NATO HO ETTORE MAJORANA CTR C1 NASA,GODDARD SPACE FLIGHT CTR,HIGH ENERGY ASTROPHYS LAB,GREENBELT,MD 20771. NR 0 TC 3 Z9 3 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3354-3 J9 NATO ADV SCI INST SE PY 1995 VL 458 BP 21 EP 30 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD12K UT WOS:A1995BD12K00002 ER PT S AU MATHER, JC AF MATHER, JC BE Shapiro, MM Silberberg, R Wefel, JP TI THE BIG BANG AND THE INFRARED SKY AS SEEN BY COBE SO CURRENTS IN HIGH-ENERGY ASTROPHYSICS SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute/9th Course of the International School of Cosmic Ray Astrophysics on Currents in High-Energy Astrophysics CY MAY 07-18, 1994 CL ETTORE MAJORANA CTR, ERICE, ITALY SP NATO HO ETTORE MAJORANA CTR C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. NR 0 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3354-3 J9 NATO ADV SCI INST SE PY 1995 VL 458 BP 235 EP 254 PG 20 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD12K UT WOS:A1995BD12K00019 ER PT S AU LOEWENSTEIN, M MUSHOTZKY, R AWAKI, H MATSUMOTO, H MAKISHIMA, K MATSUSHITA, K AF LOEWENSTEIN, M MUSHOTZKY, R AWAKI, H MATSUMOTO, H MAKISHIMA, K MATSUSHITA, K BE Holt, SS Bennett, CL TI Dark matter in NGC 4636 SO DARK MATTER SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 5th Annual October Astrophysics Conference - Dark Matter CY OCT, 1994 CL COLLEGE PK, MD SP Goddard Space Flight Ctr, Univ Maryland C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-438-4 J9 AIP CONF PROC PY 1995 IS 336 BP 190 EP 193 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD69S UT WOS:A1995BD69S00029 ER PT S AU MUSHOTZKY, R LOEWENSTEIN, M ARNAUD, K FUKAZAWA, Y AF MUSHOTZKY, R LOEWENSTEIN, M ARNAUD, K FUKAZAWA, Y BE Holt, SS Bennett, CL TI Determination of the mass distribution in rich clusters from imaging x-ray spectroscopy SO DARK MATTER SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 5th Annual October Astrophysics Conference - Dark Matter CY OCT, 1994 CL COLLEGE PK, MD SP Goddard Space Flight Ctr, Univ Maryland C1 NASA,GODDARD SPACE FLIGHT CTR,HIGH ENERGY ASTROPHYS LAB,GREENBELT,MD 20771. NR 0 TC 11 Z9 11 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-438-4 J9 AIP CONF PROC PY 1995 IS 336 BP 231 EP 242 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD69S UT WOS:A1995BD69S00036 ER PT S AU GORSKI, KM AF GORSKI, KM BE Holt, SS Bennett, CL TI Dark matter - Cosmic microwave background connection SO DARK MATTER SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 5th Annual October Astrophysics Conference - Dark Matter CY OCT, 1994 CL COLLEGE PK, MD SP Goddard Space Flight Ctr, Univ Maryland C1 NASA,GODDARD SPACE FLIGHT CTR,UNIV SPACE RES ASSOC,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-438-4 J9 AIP CONF PROC PY 1995 IS 336 BP 467 EP 476 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD69S UT WOS:A1995BD69S00074 ER PT S AU BENNETT, CL BANDAY, A GORSKI, K HINSHAW, G KOGUT, A WRIGHT, EL AF BENNETT, CL BANDAY, A GORSKI, K HINSHAW, G KOGUT, A WRIGHT, EL BE Holt, SS Bennett, CL TI COBE(1)-DMR two-year large scale anisotropy results SO DARK MATTER SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 5th Annual October Astrophysics Conference - Dark Matter CY OCT, 1994 CL COLLEGE PK, MD SP Goddard Space Flight Ctr, Univ Maryland C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-438-4 J9 AIP CONF PROC PY 1995 IS 336 BP 477 EP 480 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD69S UT WOS:A1995BD69S00075 ER PT S AU BANDAY, AJ GORSKI, KM KOGUT, A HINSHAW, G BENNETT, CL AF BANDAY, AJ GORSKI, KM KOGUT, A HINSHAW, G BENNETT, CL BE Holt, SS Bennett, CL TI On the RMS anisotropy at 7 degrees and 10 degrees observed in the COBE-DMR two year sky maps SO DARK MATTER SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 5th Annual October Astrophysics Conference - Dark Matter CY OCT, 1994 CL COLLEGE PK, MD SP Goddard Space Flight Ctr, Univ Maryland C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-438-4 J9 AIP CONF PROC PY 1995 IS 336 BP 481 EP 484 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD69S UT WOS:A1995BD69S00076 ER PT S AU HINSHAW, G BENNETT, CL KOGUT, A AF HINSHAW, G BENNETT, CL KOGUT, A BE Holt, SS Bennett, CL TI Simulated CMB maps at 0 degrees.5 resolution: Basic results SO DARK MATTER SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 5th Annual October Astrophysics Conference - Dark Matter CY OCT, 1994 CL COLLEGE PK, MD SP Goddard Space Flight Ctr, Univ Maryland C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-438-4 J9 AIP CONF PROC PY 1995 IS 336 BP 485 EP 488 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD69S UT WOS:A1995BD69S00077 ER PT S AU KOGUT, A HINSHAW, G BENNETT, CL AF KOGUT, A HINSHAW, G BENNETT, CL BE Holt, SS Bennett, CL TI CMB anisotropy at 0 degrees.5 angular scale .2. Analysis of peaks SO DARK MATTER SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 5th Annual October Astrophysics Conference - Dark Matter CY OCT, 1994 CL COLLEGE PK, MD SP Goddard Space Flight Ctr, Univ Maryland C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-438-4 J9 AIP CONF PROC PY 1995 IS 336 BP 489 EP 492 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD69S UT WOS:A1995BD69S00078 ER PT S AU KAZANAS, D AF KAZANAS, D BE Holt, SS Bennett, CL TI Alternatives to dark matter SO DARK MATTER SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 5th Annual October Astrophysics Conference - Dark Matter CY OCT, 1994 CL COLLEGE PK, MD SP Goddard Space Flight Ctr, Univ Maryland C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-438-4 J9 AIP CONF PROC PY 1995 IS 336 BP 495 EP 504 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD69S UT WOS:A1995BD69S00079 ER PT B AU Prestage, JD Tjoelker, RL Maleki, L AF Prestage, JD Tjoelker, RL Maleki, L BE Guiderdoni, B Greene, G Hinds, D TranThanhVan, J TI Atomic clock tests for variations of the fine structure constant alpha SO DARK MATTER IN COSMOLOGY, CLOCKS AND TESTS OF FUNDAMENTAL LAWS SE MORIOND WORKSHOPS LA English DT Proceedings Paper CT XXXth Rencontres de Moriond on Dark Matter in Cosmology, Clocks and Tests of Fundamental Laws CY JAN 22-29, 1995 CL VILLARS SUR OLLON, SWITZERLAND SP CNRS, Inst Natl Phys Nucl & Phys Particules, CEA, Minist Enseignement Super & Rech, Int Sci Fdn AB We describe a new test for possible variations of the fine structure constant, alpha, by atomic clock comparisons between clocks with dfifferent atomic number Z. H-maser, Cs and Hg+ clocks have a different dependence on alpha via relativistic contributions of order (alpha Z)(2). Recent H-maser vs. Hg+ clock comparison data improves laboratory limits on a time variation by 100-fold to give alpha/alpha less than or equal to 3.7x10(-14)/yr. Future laser cooled clocks (Be+, Rb, Cs, Hg+, etc.), when compared, will yield the most sensitive of all tests for time variations of alpha. RP Prestage, JD (reprint author), CALTECH,JET PROP LAB,FREQUENCY STAND LAB,4800 OAK GROVE DR,BLDG 298,PASADENA,CA 91109, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-178-1 J9 MORIOND WOR PY 1995 VL M86 BP 375 EP 381 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BG71M UT WOS:A1995BG71M00040 ER PT B AU Prestage, JD Tjoelker, RL Maleki, L AF Prestage, JD Tjoelker, RL Maleki, L BE Guiderdoni, B Greene, G Hinds, D TranThanhVan, J TI Trapped Hg+ ion frequency standard SO DARK MATTER IN COSMOLOGY, CLOCKS AND TESTS OF FUNDAMENTAL LAWS SE MORIOND WORKSHOPS LA English DT Proceedings Paper CT XXXth Rencontres de Moriond on Dark Matter in Cosmology, Clocks and Tests of Fundamental Laws CY JAN 22-29, 1995 CL VILLARS SUR OLLON, SWITZERLAND SP CNRS, Inst Natl Phys Nucl & Phys Particules, CEA, Minist Enseignement Super & Rech, Int Sci Fdn AB This paper reviews the linear trap based Hg+ frequency standards which have been developed at the JPL Frequency Standards Lab. The present units show excellent frequency stability to below 10(-15) at averaging times of a few hours. Some of the sources of frequency instability are discussed and a new architecture of the linear trap is described which can substantially reduce these instabilities. RP Prestage, JD (reprint author), CALTECH,JET PROP LAB,FREQUENCY STAND LAB,4800 OAK GROVE DR,BLDG 298,PASADENA,CA 91109, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-178-1 J9 MORIOND WOR PY 1995 VL M86 BP 383 EP 389 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BG71M UT WOS:A1995BG71M00041 ER PT B AU CHENG, LJ REYES, G AF CHENG, LJ REYES, G BE Dubey, AC Cindrich, I Ralston, JM Rigano, K TI AOTF POLARIMETRIC HYPERSPECTRAL IMAGING FOR MINE DETECTION SO DETECTION TECHNOLOGIES FOR MINES AND MINELIKE TARGETS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Detection Technologies for Mines and Minelike Targets CY APR 17-21, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-8194-1852-8 J9 P SOC PHOTO-OPT INS PY 1995 VL 2496 BP 305 EP 311 DI 10.1117/12.211326 PG 7 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BD42F UT WOS:A1995BD42F00030 ER PT B AU CHAO, TH LAU, B YACOUBIAN, A HENDERSON, G AF CHAO, TH LAU, B YACOUBIAN, A HENDERSON, G BE Dubey, AC Cindrich, I Ralston, JM Rigano, K TI MINE DETECTION USING WAVELET PROCESSING OF ELECTRO-OPTIC ACTIVE SENSOR DATA SO DETECTION TECHNOLOGIES FOR MINES AND MINELIKE TARGETS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Detection Technologies for Mines and Minelike Targets CY APR 17-21, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 JET PROP LAB,PASADENA,CA 91109. 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 0-8194-1852-8 J9 P SOC PHOTO-OPT INS PY 1995 VL 2496 BP 433 EP 441 DI 10.1117/12.211340 PG 9 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BD42F UT WOS:A1995BD42F00043 ER PT B AU DAUD, T DUONG, T LANGENBACHER, H TSU, H THAKOOR, A AF DAUD, T DUONG, T LANGENBACHER, H TSU, H THAKOOR, A BE Dubey, AC Cindrich, I Ralston, JM Rigano, K TI MINE DISCRIMINATION USING MULTISPECTRAL IMAGERY WITH FEEDFORWARD NEURAL NETWORKS SO DETECTION TECHNOLOGIES FOR MINES AND MINELIKE TARGETS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Detection Technologies for Mines and Minelike Targets CY APR 17-21, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 CALTECH,JET PROP LAB,CTR SPACE MICROELECTR TECHNOL,PASADENA,CA 91109. 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 0-8194-1852-8 J9 P SOC PHOTO-OPT INS PY 1995 VL 2496 BP 614 EP 625 DI 10.1117/12.211358 PG 12 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BD42F UT WOS:A1995BD42F00060 ER PT B AU BRANDT, RD CAPRARO, KS AF BRANDT, RD CAPRARO, KS BE Walowit, E TI PRAGMATIC APPROACH TO DEVICE-INDEPENDENT COLOR SO DEVICE-INDEPENDENT COLOR IMAGING II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Device-Independent Color Imaging II Conference CY FEB 07-08, 1995 CL SAN JOSE, CA SP SOC IMAGING SCI & TECHNOL, SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 JET PROP LAB,PASADENA,CA 91109. 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 0-8194-1761-0 J9 P SOC PHOTO-OPT INS PY 1995 VL 2414 BP 178 EP 187 DI 10.1117/12.206545 PG 10 WC Computer Science, Software Engineering; Optics SC Computer Science; Optics GA BC99A UT WOS:A1995BC99A00018 ER PT B AU KRUEGER, KJ AF KRUEGER, KJ BE Fiocco, G Visconti, G TI UV remote sensing of the Earth's atmosphere SO DIAGNOSTIC TOOLS IN ATMOSPHERIC PHYSICS SE PROCEEDINGS OF THE INTERNATIONAL SCHOOL OF PHYSICS ENRICO FERMI LA English DT Proceedings Paper CT Course CXXIV of the International School of Physics Enrico Fermi - Diagnostic Tools in Atmospheric Physics CY JUN 22-JUL 02, 1993 CL VARENNA, ITALY SP Italian Phys Soc RP GODDARD SPACE FLIGHT CTR,EARTH SCI DIRECTORATE,ATMOSPHERES LAB,GREENBELT,MD 20771, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I O S PRESS PI AMSTERDAM PA VAN DIEMENSTRAAT 94, 1013 CN AMSTERDAM, NETHERLANDS BN 90-5199-202-5 J9 P INT SCH PHYS PY 1995 VL 124 BP 155 EP 181 PG 3 WC Geosciences, Multidisciplinary; Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Remote Sensing SC Geology; Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Remote Sensing GA BD66V UT WOS:A1995BD66V00010 ER PT B AU MCCORMICK, MP WANG, PH AF MCCORMICK, MP WANG, PH BE Fiocco, G Visconti, G TI Satellite occultation measurements of the Earth's atmosphere using SAM II, SAGE and SAGE II SO DIAGNOSTIC TOOLS IN ATMOSPHERIC PHYSICS SE PROCEEDINGS OF THE INTERNATIONAL SCHOOL OF PHYSICS ENRICO FERMI LA English DT Proceedings Paper CT Course CXXIV of the International School of Physics Enrico Fermi - Diagnostic Tools in Atmospheric Physics CY JUN 22-JUL 02, 1993 CL VARENNA, ITALY SP Italian Phys Soc RP NASA,LANGLEY RES CTR,DIV ATMOSPHER SCI,HAMPTON,VA 23681, USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU I O S PRESS PI AMSTERDAM PA VAN DIEMENSTRAAT 94, 1013 CN AMSTERDAM, NETHERLANDS BN 90-5199-202-5 J9 P INT SCH PHYS PY 1995 VL 124 BP 183 EP 202 PG 4 WC Geosciences, Multidisciplinary; Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Remote Sensing SC Geology; Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Remote Sensing GA BD66V UT WOS:A1995BD66V00011 ER PT B AU STOLARSKI, RS AF STOLARSKI, RS BE Fiocco, G Visconti, G TI Ozone trends from TOMS data SO DIAGNOSTIC TOOLS IN ATMOSPHERIC PHYSICS SE PROCEEDINGS OF THE INTERNATIONAL SCHOOL OF PHYSICS ENRICO FERMI LA English DT Proceedings Paper CT Course CXXIV of the International School of Physics Enrico Fermi - Diagnostic Tools in Atmospheric Physics CY JUN 22-JUL 02, 1993 CL VARENNA, ITALY SP Italian Phys Soc RP NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771, USA. RI Stolarski, Richard/B-8499-2013 OI Stolarski, Richard/0000-0001-8722-4012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I O S PRESS PI AMSTERDAM PA VAN DIEMENSTRAAT 94, 1013 CN AMSTERDAM, NETHERLANDS BN 90-5199-202-5 J9 P INT SCH PHYS PY 1995 VL 124 BP 279 EP 288 PG 4 WC Geosciences, Multidisciplinary; Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Remote Sensing SC Geology; Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Remote Sensing GA BD66V UT WOS:A1995BD66V00016 ER PT B AU SCHOEBERL, MR SPARLING, LC AF SCHOEBERL, MR SPARLING, LC BE Fiocco, G Visconti, G TI Trajectory modelling SO DIAGNOSTIC TOOLS IN ATMOSPHERIC PHYSICS SE PROCEEDINGS OF THE INTERNATIONAL SCHOOL OF PHYSICS ENRICO FERMI LA English DT Proceedings Paper CT Course CXXIV of the International School of Physics Enrico Fermi - Diagnostic Tools in Atmospheric Physics CY JUN 22-JUL 02, 1993 CL VARENNA, ITALY SP Italian Phys Soc RP NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771, USA. NR 0 TC 60 Z9 60 U1 0 U2 1 PU I O S PRESS PI AMSTERDAM PA VAN DIEMENSTRAAT 94, 1013 CN AMSTERDAM, NETHERLANDS BN 90-5199-202-5 J9 P INT SCH PHYS PY 1995 VL 124 BP 289 EP 305 PG 3 WC Geosciences, Multidisciplinary; Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Remote Sensing SC Geology; Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Remote Sensing GA BD66V UT WOS:A1995BD66V00017 ER PT B AU EINAUDI, F AF EINAUDI, F BE Fiocco, G Visconti, G TI Gravity waves in the troposphere SO DIAGNOSTIC TOOLS IN ATMOSPHERIC PHYSICS SE PROCEEDINGS OF THE INTERNATIONAL SCHOOL OF PHYSICS ENRICO FERMI LA English DT Proceedings Paper CT Course CXXIV of the International School of Physics Enrico Fermi - Diagnostic Tools in Atmospheric Physics CY JUN 22-JUL 02, 1993 CL VARENNA, ITALY SP Italian Phys Soc RP NASA,GODDARD SPACE FLIGHT CTR,CODE 910,GREENBELT,MD 20771, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU I O S PRESS PI AMSTERDAM PA VAN DIEMENSTRAAT 94, 1013 CN AMSTERDAM, NETHERLANDS BN 90-5199-202-5 J9 P INT SCH PHYS PY 1995 VL 124 BP 307 EP 340 PG 4 WC Geosciences, Multidisciplinary; Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Remote Sensing SC Geology; Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Remote Sensing GA BD66V UT WOS:A1995BD66V00018 ER PT J AU Mearini, GT Krainsky, IL Dayton, JA Zorman, C Wang, YX Lamouri, A AF Mearini, GT Krainsky, IL Dayton, JA Zorman, C Wang, YX Lamouri, A TI Effects of surface treatments on secondary electron emission from CVD diamond films SO DIAMOND FILMS AND TECHNOLOGY LA English DT Article DE diamond; CVD; secondary electron emission ID PHOTOEMISSION; HYDROGEN AB Secondary electron emission (SEE) properties of polycrystalline diamond films grown by chemical vapor deposition (CVD) were measured. The total secondary yield (sigma) from as-grown samples was observed to be as high as 20 at room temperature and 48 while heating at 700 K in vacuum. Electron-beam-activated, alkali-terminated diamond films have shown stable values of sigma as high as 60 when coated with CsI and similarly high values when coated with other alkali halides. Diamond coated with BaF2 had a stable sigma of 6, but no enhancement of the SEE properties was observed with coatings of Ti or Au. Hydrogen was identified to give rise to this effect in as-grown films. However, electron beam exposure led to a reduction in sigma to values as low as 2. Exposure to a molecular hydrogen environment restored sigma to its original value after degradation, and enabled stable secondary emission during electron beam exposure. Atomic hydrogen and hydrogen plasma treatments were performed on diamond/Mo samples in an attempt to increase the near-surface hydrogen concentration which might lead to increased stability in the secondary emission. Raman scattering analysis, scanning electron microscopy, and Auger electron spectroscopy (AES) confirmed that hydrogen plasma and atomic hydrogen treatments improved the quality of the CVD diamond significantly. Elastic recoil detection (ERD) showed that heating as-grown diamond targets to 700 K, which was correlated with an increase in sigma, removed contaminants from the surface but did not drive hydrogen from the diamond bulk. ERD showed that the hydrogen plasma treatment produced an increase in the hydrogen concentration in the nearsurface region which did not decrease while heating in vacuum at 700 K, but no improvement in the SEE properties was observed. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. GEN VACUUM INC,CLEVELAND,OH 44105. NR 26 TC 5 Z9 5 U1 0 U2 0 PU MYU K K PI TOKYO PA SCIENTIFIC PUBLISHING DIV, 2-32-3 SENDAGI, BUNKYO-KU, TOKYO 113, JAPAN SN 0917-4540 J9 DIAMOND FILM TECHNOL JI Diam. Films Technol. PY 1995 VL 5 IS 6 BP 339 EP 352 PG 14 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA TY373 UT WOS:A1995TY37300003 ER PT B AU Jenniskens, P Desert, FX AF Jenniskens, P Desert, FX BE Tielens, AGG Snow, TP TI The diffuse interstellar band spectrum SO DIFFUSE INTERSTELLAR BANDS SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT Conference on the Diffuse Interstellar Bands CY MAY 16-19, 1994 CL UNIV COLORADO, BOULDER, CO SP NASA, Astron & Relativ Branch HO UNIV COLORADO C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. NR 0 TC 7 Z9 7 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3629-1 J9 ASTROPHYS SPACE SC L PY 1995 VL 202 BP 39 EP 51 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE67B UT WOS:A1995BE67B00005 ER PT B AU Joblin, C Salama, F Allamandola, L AF Joblin, C Salama, F Allamandola, L BE Tielens, AGG Snow, TP TI Visible luminescence from PAH cations and the diffuse bands in emission SO DIFFUSE INTERSTELLAR BANDS SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT Conference on the Diffuse Interstellar Bands CY MAY 16-19, 1994 CL UNIV COLORADO, BOULDER, CO SP NASA, Astron & Relativ Branch HO UNIV COLORADO C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. RI Salama, Farid/A-8787-2009 OI Salama, Farid/0000-0002-6064-4401 NR 0 TC 2 Z9 2 U1 0 U2 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3629-1 J9 ASTROPHYS SPACE SC L PY 1995 VL 202 BP 157 EP 163 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE67B UT WOS:A1995BE67B00017 ER PT B AU Allamandola, LJ AF Allamandola, LJ BE Tielens, AGG Snow, TP TI Laboratory studies of DIB carriers SO DIFFUSE INTERSTELLAR BANDS SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT Conference on the Diffuse Interstellar Bands CY MAY 16-19, 1994 CL UNIV COLORADO, BOULDER, CO SP NASA, Astron & Relativ Branch HO UNIV COLORADO C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. NR 0 TC 4 Z9 4 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3629-1 J9 ASTROPHYS SPACE SC L PY 1995 VL 202 BP 175 EP 198 PG 24 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE67B UT WOS:A1995BE67B00019 ER PT B AU Salama, F Joblin, C Allamandola, LJ AF Salama, F Joblin, C Allamandola, LJ BE Tielens, AGG Snow, TP TI Absorption spectroscopy of neutral and ionized PAHS. Implications for the diffuse interstellar bands SO DIFFUSE INTERSTELLAR BANDS SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT Conference on the Diffuse Interstellar Bands CY MAY 16-19, 1994 CL UNIV COLORADO, BOULDER, CO SP NASA, Astron & Relativ Branch HO UNIV COLORADO C1 NASA,AMES RES CTR,DIV SPACE SCI,MOFFETT FIELD,CA 94035. RI Salama, Farid/A-8787-2009 OI Salama, Farid/0000-0002-6064-4401 NR 0 TC 3 Z9 3 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3629-1 J9 ASTROPHYS SPACE SC L PY 1995 VL 202 BP 207 EP 217 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE67B UT WOS:A1995BE67B00021 ER PT B AU Tielens, AGGM AF Tielens, AGGM BE Tielens, AGG Snow, TP TI The diffuse interstellar bands - Summary SO DIFFUSE INTERSTELLAR BANDS SE ASTROPHYSICS AND SPACE SCIENCE LIBRARY LA English DT Proceedings Paper CT Conference on the Diffuse Interstellar Bands CY MAY 16-19, 1994 CL UNIV COLORADO, BOULDER, CO SP NASA, Astron & Relativ Branch HO UNIV COLORADO C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. NR 0 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3629-1 J9 ASTROPHYS SPACE SC L PY 1995 VL 202 BP 395 EP 405 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE67B UT WOS:A1995BE67B00039 ER PT S AU Adam, NR Halem, M Naqvi, S AF Adam, NR Halem, M Naqvi, S BE Adam, NR Bhargava, BK Yesha, Y TI Promising research directions in digital libraries SO DIGITAL LIBRARIES: CURRENT ISSUES SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT Digital Libraries Workshop (DL 94) CY MAY 19-20, 1994 CL NEWARK, NJ SP Rutgers Univ, Purdue Univ, Bellcore, AT&T, Natl Inst Stand & Technol, Natl Sci Fdn C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. BELLCORE,MORRISTOWN,NJ 07960. RP Adam, NR (reprint author), RUTGERS STATE UNIV,180 UNIV AVE,NEWARK,NJ 07102, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY SN 0302-9743 BN 3-540-59282-2 J9 LECT NOTES COMPUT SC PY 1995 VL 916 BP 21 EP 29 PG 9 WC Computer Science, Information Systems SC Computer Science GA BE66D UT WOS:A1995BE66D00003 ER PT S AU Fayyad, UM Smyth, P AF Fayyad, UM Smyth, P BE Adam, NR Bhargava, BK Yesha, Y TI The automated analysis, cataloging, and searching of digital image libraries: A machine learning approach SO DIGITAL LIBRARIES: CURRENT ISSUES SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT Digital Libraries Workshop (DL 94) CY MAY 19-20, 1994 CL NEWARK, NJ SP Rutgers Univ, Purdue Univ, Bellcore, AT&T, Natl Inst Stand & Technol, Natl Sci Fdn RP Fayyad, UM (reprint author), CALTECH,JET PROP LAB,MACHINE LEARNING SYST GRP,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY SN 0302-9743 BN 3-540-59282-2 J9 LECT NOTES COMPUT SC PY 1995 VL 916 BP 225 EP 249 PG 25 WC Computer Science, Information Systems SC Computer Science GA BE66D UT WOS:A1995BE66D00014 ER PT B AU VENKATAKRISHNAN, V AF VENKATAKRISHNAN, V BE Keyes, DE Saad, Y Truhlar, DG TI PARALLEL IMPLICIT METHODS FOR AERODYNAMIC APPLICATIONS ON UNSTRUCTURED GRIDS SO DOMAIN-BASED PARALLELISM AND PROBLEM DECOMPOSITION METHODS IN COMPUTATIONAL SCIENCE AND ENGINEERING LA English DT Proceedings Paper CT Workshop on Domain-Based Parallelism and Problem Decomposition Methods in Computational Science and Engineering CY APR, 1994 CL MINNESOTA SUPERCOMP INST, MINNEAPOLIS, MN HO MINNESOTA SUPERCOMP INST C1 NASA,LANGLEY RES CTR,INST COMP APPLICAT SCI & ENGN,HAMPTON,VA 23681. RI Truhlar, Donald/G-7076-2015 OI Truhlar, Donald/0000-0002-7742-7294 NR 0 TC 0 Z9 0 U1 0 U2 0 PU SIAM PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 BN 0-89871-348-X PY 1995 BP 57 EP 74 PG 18 WC Computer Science, Theory & Methods SC Computer Science GA BD08D UT WOS:A1995BD08D00004 ER PT B AU SCHWENKE, DW TRUHLAR, DG AF SCHWENKE, DW TRUHLAR, DG BE Keyes, DE Saad, Y Truhlar, DG TI PROBLEM DECOMPOSITION TECHNIQUES IN QUANTUM MECHANICAL REACTIVE SCATTERING SO DOMAIN-BASED PARALLELISM AND PROBLEM DECOMPOSITION METHODS IN COMPUTATIONAL SCIENCE AND ENGINEERING LA English DT Proceedings Paper CT Workshop on Domain-Based Parallelism and Problem Decomposition Methods in Computational Science and Engineering CY APR, 1994 CL MINNESOTA SUPERCOMP INST, MINNEAPOLIS, MN HO MINNESOTA SUPERCOMP INST C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. RI schwenke, david/I-3564-2013; Truhlar, Donald/G-7076-2015 OI Truhlar, Donald/0000-0002-7742-7294 NR 0 TC 2 Z9 2 U1 0 U2 0 PU SIAM PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 BN 0-89871-348-X PY 1995 BP 303 EP 323 PG 21 WC Computer Science, Theory & Methods SC Computer Science GA BD08D UT WOS:A1995BD08D00017 ER PT J AU Salama, A Kangas, J AF Salama, A Kangas, J TI Description of the trajectory functions of TOPEX/POSEIDON navigation SO EARTH MOON AND PLANETS LA English DT Article; Proceedings Paper CT 4th United-Nations/European-Space-Agency Workshop on Basic Space Science CY JUN 27-JUL 01, 1994 CL CAIRO, EGYPT SP UN, European Space Agcy, Egyptian Govt, Natl Res Inst Astron & Geophys, Helwan, Cairo, Univ Cairo, Natl Authority Remote Sensing & Space Sci, Cairo AB TOPEX/POSEIDON is a joint American/French ocean topography experiment. It was launched by an Ariane launch vehicle on August 10, 1992 to study and map ocean circulation. The primary functions of the navigation subsystem of the TOPEX/POSEIDON project are to establish and maintain a pre-designed reference orbit, and to measure, monitor, and predict the satellite ground track continuously. To fulfill these functions, trajectory analysis is required to design and rate all trajectory related products. This paper is concerned with the trajectory functions of TOPEX/POSEIDON navigation. It describes various activities of this support function. RP Salama, A (reprint author), CALTECH,JET PROP LAB,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0167-9295 J9 EARTH MOON PLANETS JI Earth Moon Planets PY 1995 VL 70 IS 1-3 BP 47 EP 60 DI 10.1007/BF00619450 PG 14 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA TU201 UT WOS:A1995TU20100004 ER PT J AU Canuto, VM AF Canuto, VM TI Greenhouse effect and related problems SO EARTH MOON AND PLANETS LA English DT Article; Proceedings Paper CT 4th United-Nations/European-Space-Agency Workshop on Basic Space Science CY JUN 27-JUL 01, 1994 CL CAIRO, EGYPT SP UN, European Space Agcy, Egyptian Govt, Natl Res Inst Astron & Geophys, Helwan, Cairo, Univ Cairo, Natl Authority Remote Sensing & Space Sci, Cairo ID CARBON-DIOXIDE; CLIMATE; METHANE; MODEL RP Canuto, VM (reprint author), NASA,GODDARD INST SPACE STUDIES,2880 BROADWAY,NEW YORK,NY 10025, USA. NR 18 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0167-9295 J9 EARTH MOON PLANETS JI Earth Moon Planets PY 1995 VL 70 IS 1-3 BP 75 EP 78 DI 10.1007/BF00619452 PG 4 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA TU201 UT WOS:A1995TU20100006 ER PT J AU Fairbridge, RW Haubold, HJ Windelius, G AF Fairbridge, RW Haubold, HJ Windelius, G TI Potential of interplanetary torques and solar modulation for triggering terrestrial atmospheric and lithospheric events SO EARTH MOON AND PLANETS LA English DT Article; Proceedings Paper CT 4th United-Nations/European-Space-Agency Workshop on Basic Space Science CY JUN 27-JUL 01, 1994 CL CAIRO, EGYPT SP UN, European Space Agcy, Egyptian Govt, Natl Res Inst Astron & Geophys, Helwan, Cairo, Univ Cairo, Natl Authority Remote Sensing & Space Sci, Cairo AB The Sun is forced into an orbit around the barycenter of the solar system because of the changing mass distributions of the planets. Solar-planetary-lunar dynamic relationships may form a new basis for understanding and predicting cyclic solar forcing functions on the Earth's climate. C1 NASA,GODDARD INST SPACE STUDIES,NEW YORK,NY 10025. UN,OUTER SPACE OFF,VIENNA INT CTR,A-1400 VIENNA,AUSTRIA. RP Fairbridge, RW (reprint author), COLUMBIA UNIV,NEW YORK,NY 10025, USA. NR 6 TC 1 Z9 1 U1 1 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0167-9295 J9 EARTH MOON PLANETS JI Earth Moon Planets PY 1995 VL 70 IS 1-3 BP 179 EP 181 DI 10.1007/BF00619462 PG 3 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA TU201 UT WOS:A1995TU20100016 ER PT J AU SPILKER, TR AF SPILKER, TR TI NH3, H2S, AND THE RADIO BRIGHTNESS TEMPERATURE SPECTRA OF THE GIANT PLANETS SO EARTH MOON AND PLANETS LA English DT Article; Proceedings Paper CT 1st International Conference on Comparative Planetology with an Earth Perspective CY JUN 06-08, 1994 CL PASADENA, CA ID NEPTUNE; URANUS; ATMOSPHERE; VOYAGER-2; IMAGES RP SPILKER, TR (reprint author), CALTECH,JET PROP LAB,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 16 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 0167-9295 J9 EARTH MOON PLANETS JI Earth Moon Planets PY 1995 VL 67 IS 1-3 BP 89 EP 94 PG 6 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA TD346 UT WOS:A1995TD34600012 ER PT J AU CUZZI, JN AF CUZZI, JN TI EVOLUTION OF PLANETARY RINGMOON SYSTEMS SO EARTH MOON AND PLANETS LA English DT Article DE PLANETARY RINGS; OUTER PLANETS; ORIGIN AND EVOLUTION ID SATURNS F-RING; PARTICLE EROSION MECHANISMS; DENSE COLLISIONAL SYSTEMS; OUTER SOLAR-SYSTEM; URANIAN RINGS; BALLISTIC TRANSPORT; RADIO OCCULTATION; SIZE DISTRIBUTION; TIDAL DISRUPTION; ENCKE GAP AB The last few decades have seen an avalanche of observations of planetary ring systems, both from spacecraft and from Earth. Meanwhile, we have seen steady progress in our understanding of these systems as our intuition (and our computers) catch up with the myriad ways in which gravity, fluid and statistical mechanics, and electromagnetism can combine to shape the distribution of the submicron-to-several-meter size particles which comprise ring systems [1-5]. The now-complete reconnaissance of the gas giant planets by spacecraft has revealed that ring systems are invariably found in association with families of regular satellites, and there is an emerging perspective that they are not only physically but causally linked. There is also mounting evidence that many features or aspects of all planetary ring systems, if not the ring systems themselves, are considerably younger than the solar system. RP NASA, AMES RES CTR, DIV SPACE SCI, MOFFETT FIELD, CA 94035 USA. NR 190 TC 12 Z9 12 U1 0 U2 1 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-9295 EI 1573-0794 J9 EARTH MOON PLANETS JI Earth Moon Planets PY 1995 VL 67 IS 1-3 BP 179 EP 208 PG 30 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA TD346 UT WOS:A1995TD34600020 ER PT J AU CHAHINE, MT AHEARN, MF RAHE, JH AF CHAHINE, MT AHEARN, MF RAHE, JH TI COMPARATIVE PLANETOLOGY WITH AN EARTH PERSPECTIVE - INTRODUCTION SO EARTH MOON AND PLANETS LA English DT Editorial Material C1 UNIV MARYLAND,COLLEGE PK,MD 20742. RP CHAHINE, MT (reprint author), JET PROP LAB,PASADENA,CA 91109, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0167-9295 J9 EARTH MOON PLANETS JI Earth Moon Planets PY 1995 VL 67 IS 1-3 BP R9 EP R10 PG 2 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA TD346 UT WOS:A1995TD34600002 ER PT J AU GALINDOISRAEL, V IMBRIALE, W MITTRA, R AF GALINDOISRAEL, V IMBRIALE, W MITTRA, R TI EFFECT OF SUBREFLECTOR AND FEED SCATTERING IN DUAL-SHAPED REFLECTOR SINGLE-CHAMBER COMPACT RANGES SO ELECTROMAGNETICS LA English DT Article; Proceedings Paper CT International IEEE Antennas and Propagation Symposium on Modern Development in Reflector Antennas CY JUL, 1992 CL ANN ARBOR, MI SP IEEE AB The effects of feed interference and diffraction scattering from the subreflector in dual-shaped reflector single-chamber compact ranges are investigated. These effects are manifested as undesirable ripple of the fields in the quiet or measurement zone of the compact range. Reduction of this ripple can be accomplished, without any deleterious effects on range performance, by serrating or rolling the edges of the subreflector, and/or, as investigated herein and earlier, by substantial reduction of the shaped subreflector edge fields. In an earlier work, the feed spillover fields and the diffraction from the subreflector radiating directly into the measurement zone was not accounted for in the single chamber geometry. We intend, in this paper, to show the effects of this scattering on the measurements zone ripple. Three dual shaped models are considered - a -30 dB subreflector edge taper, a -20 dB taper, and a -10 dB taper. In general, the -20 dB and -30 dB edge tapers prove sufficient to result in virtually no direct interference ripple by the feed or subreflector fields anywhere in the measurement zone. The -10 dB subreflector edge taper does result in moderately extra ripple effect close to the main reflector region of the measurement zone. Since the field scattered from the subreflector as well as the feed radiation generally decay approximately as 1/R from their respective caustic source regions, and whereas the field scattered from the main reflector is focussed into a planar wave, the ripple due to these extraneous scattering effects (subreflector and feed radiated fields) diminishes rapidly with distance from the main reflector. RP GALINDOISRAEL, V (reprint author), CALTECH,JET PROP LAB,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 0 TC 0 Z9 0 U1 2 U2 2 PU HEMISPHERE PUBL CORP PI BRISTOL PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598 SN 0272-6343 J9 ELECTROMAGNETICS JI Electromagnetics PD JAN-FEB PY 1995 VL 15 IS 1 BP 133 EP 142 DI 10.1080/02726349508908404 PG 10 WC Engineering, Electrical & Electronic SC Engineering GA QF462 UT WOS:A1995QF46200009 ER PT S AU PHILLIPS, KJH PIKE, CD LANG, J ZARRO, DM FLUDRA, A WATANABE, T TAKAHASHI, M AF PHILLIPS, KJH PIKE, CD LANG, J ZARRO, DM FLUDRA, A WATANABE, T TAKAHASHI, M BE BelyDubau, F TI EVIDENCE FOR THE EQUALITY OF THE SOLAR PHOTOSPHERIC AND CORONAL ABUNDANCE OF IRON SO ELEMENT ABUNDANCE VARIATIONS IN THE SUN AND HELIOSPHERE SE ADVANCES IN SPACE RESEARCH-SERIES LA English DT Article; Proceedings Paper CT E2.1 Meeting of COSPAR Scientific Commission E on Element Abundance Variations in the Sun and Heliosphere, at the 13th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP COMM SPACE RES, INT ASTRON UNION ID FLUORESCENCE; SPECTRA; RATES AB The Fe K alpha and K beta X-ray lines (wavelengths 1.94 and 1.76 Angstrom) in the solar X-ray spectrum are formed by fluorescence of photospheric iron atoms, and the ratio of the intensity of either to the He-like iron (Fe xxv) resonance line at 1.85 Angstrom is a function of the photospheric-to-coronal abundance of iron. The temperature dependence of this ratio is weak as long as the flare temperature T-e>15 x 10(6)K. Comparison of the theoretical value of this intensity ratio with observations from crystal spectrometers on Yohkoh, SMM and P78-1 are consistent with the photospheric abundance of Fe being equal to the coronal. C1 NASA, GODDARD SPACE FLIGHT CTR, APPL RES CORP, GREENBELT, MD 20771 USA. UCL, MULLARD SPACE SCI LAB, LONDON, ENGLAND. NATL ASTRON OBSERV, MITAKA, TOKYO 181, JAPAN. TOKAI UNIV, DEPT PHYS, KANAGAWA, JAPAN. RP PHILLIPS, KJH (reprint author), RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. NR 13 TC 4 Z9 4 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0273-1177 BN 0-08-042557-7 J9 ADV SPACE RES-SERIES PY 1995 VL 15 IS 7 BP 33 EP 36 DI 10.1016/0273-1177(94)00016-T PG 4 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC78G UT WOS:A1995BC78G00004 ER PT S AU REAMES, DV AF REAMES, DV BE BelyDubau, F TI CORONAL ABUNDANCES DETERMINED FROM ENERGETIC PARTICLES SO ELEMENT ABUNDANCE VARIATIONS IN THE SUN AND HELIOSPHERE SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT E2.1 Meeting of COSPAR Scientific Commission E on Element Abundance Variations in the Sun and Heliosphere, at the 13th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP COMM SPACE RES, INT ASTRON UNION ID INTERPLANETARY MEDIUM; ELEMENTAL ABUNDANCES; ION-ACCELERATION; SOLAR-FLARES; ENHANCEMENTS AB Solar energetic particles (SEPs) provide a measurement of coronal element abundances that is highly independent of the ionization states and temperature of the ions in the source plasma. The most complete measurements come from large 'gradual' events where ambient coronal plasma is swept up by the expanding shock wave from a coronal mass ejection. Particles from 'impulsive' flares, have a pattern of acceleration-induced enhancements superimposed on the coronal abundances. Particles accelerated from high-speed solar wind streams at corotating shocks show a different abundance pattern corresponding to material from coronal holes. Large variations in He/O in coronal material are seen for both gradual and impulsive-flare events but other abundance ratios, such as Mg/Ne, are remarkably constant. SEP measurements now include hundreds of events spanning 15 years of high-quality measurement. RP REAMES, DV (reprint author), NASA,GODDARD SPACE FLIGHT CTR,CODE 661,GREENBELT,MD 20771, USA. NR 33 TC 179 Z9 181 U1 0 U2 3 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042557-7 J9 ADV SPACE RES PY 1995 VL 15 IS 7 BP 41 EP 51 DI 10.1016/0273-1177(94)00018-V PG 11 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC78G UT WOS:A1995BC78G00006 ER PT B AU OGBUJI, LUJ HARDING, DR AF OGBUJI, LUJ HARDING, DR BE Dahotre, NB Hampikian, JM Stiglich, JJ TI Determining the biaxial strength of plasma-deposited silicon (oxy)nitride films. SO ELEVATED TEMPERATURE COATINGS: SCIENCE AND TECHNOLOGY I LA English DT Proceedings Paper CT Symposium on Elevated Temperature Coatings - I, at the 1994 TMS Fall Meeting CY OCT 03-06, 1994 CL ROSEMONT, IL SP Minerals Met & Mat Soc, Surface Modificat & Coatings Technol Comm C1 NASA,LEWIS RES CTR,NYMA,CLEVELAND,OH 44135. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-289-2 PY 1995 BP 31 EP 39 PG 9 WC Materials Science, Coatings & Films; Materials Science, Composites SC Materials Science GA BD52T UT WOS:A1995BD52T00003 ER PT B AU PEREZ, R AF PEREZ, R GP IEEE TI Parallel computing in the teaching of electromagnetic computational methods for analyzing EMC problems SO EMC - A GLOBAL CONCERN : IEEE 1995 INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, SYMPOSIUM RECORD LA English DT Proceedings Paper CT IEEE 1995 International Symposium on Electromagnetic Compatibility - EMC: A Global Concern CY AUG 14-18, 1995 CL ATLANTA, GA SP IEEE, EMC Soc C1 CALTECH,JET PROPULS LAB,PASADENA,CA 91125. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2574-5 PY 1995 BP 41 EP 46 PG 6 WC Engineering, Biomedical; Engineering, Electrical & Electronic; Remote Sensing; Telecommunications SC Engineering; Remote Sensing; Telecommunications GA BE06X UT WOS:A1995BE06X00009 ER PT J AU CHATTOPADHYAY, A MCCARTHY, TR AF CHATTOPADHYAY, A MCCARTHY, TR TI A DESIGN OPTIMIZATION PROCEDURE FOR MINIMIZING DRIVE SYSTEM WEIGHT OF HIGH-SPEED PROP-ROTORS SO ENGINEERING OPTIMIZATION LA English DT Article DE AIRCRAFT; PROP-ROTORS; DRIVE SYSTEM; OPTIMIZATION AB An optimization procedure is developed to address the problem of minimizing the drive system weight of high speed prop-rotor aircraft which are required to demonstrate fixed-wing-like efficiencies in high speed forward flight and maintain acceptable hover figure of merit similar to helicopters. The optimization is performed using the method of feasible directions. A hybrid approximate analysis procedure is also used to reduce the computational effort of using exact analysis for every function evaluation necessary within the optimizer. The results compared to a reference rotor show significant weight reductions. The aerodynamic performance of the optimized rotor, analyzed at ''off-design'' points to judge the strength of the optimization problem formulation and the validity of the resulting design, shows considerable improvements. The results are compared to the reference values and significant reduction in the weight is achieved. C1 NASA,AMES RES CTR,ROTORCRAFT TECHNOL BRANCH,MOFFETT FIELD,CA 94035. RP CHATTOPADHYAY, A (reprint author), ARIZONA STATE UNIV,DEPT MECH & AEROSP ENGN,TEMPE,AZ 85287, USA. NR 9 TC 3 Z9 3 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0305-215X J9 ENG OPTIMIZ JI Eng. Optimiz. PY 1995 VL 23 IS 3 BP 239 EP 254 DI 10.1080/03052159508941356 PG 16 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA QF387 UT WOS:A1995QF38700005 ER PT S AU CROMMELYNCK, D FICHOT, A LEE, RB ROMERO, J AF CROMMELYNCK, D FICHOT, A LEE, RB ROMERO, J BE Innocenti, L Mesland, DAM TI FIRST REALIZATION OF THE SPACE ABSOLUTE RADIOMETRIC REFERENCE (SARR) DURING THE ATLAS-2 FLIGHT PERIOD SO EURECA SCIENTIFIC RESULTS SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT F1 Symposium of COSPAR Scientific-Commission-F on Eureca Scientific Results, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP EUROPEAN SPACE AGCY AB A number of different solar constant observations all made from space during the ATLAS 2 mission have been gathered and compared to each other. The Sun did not have a single sunspot during several days. As eight of the radiometric channels were all within 0.1 %, the mean of the observations has been used to determine a set of adjustment factors providing de facto the definition of the Space Absolute Radiometric Reference (SARR). C1 NASA,LANGLEY RES CTR,DIV ATMOSPHER SCI,HAMPTON,VA 23665. PHYS METEOROL OBSERV DAVOS,CTR WORLD RADIAT,CH-7260 DAVOS,SWITZERLAND. RP CROMMELYNCK, D (reprint author), ROYAL METEOROL INST BELGIUM,DEPT AEROL,3 AVE CIRCULAIRE,B-1180 BRUSSELS,BELGIUM. NR 10 TC 30 Z9 32 U1 0 U2 1 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042633-6 J9 ADV SPACE RES PY 1995 VL 16 IS 8 BP 17 EP 23 DI 10.1016/0273-1177(95)00261-C PG 7 WC Engineering, Aerospace; Physics, Multidisciplinary SC Engineering; Physics GA BD12R UT WOS:A1995BD12R00003 ER PT J AU ORON, A DEISSLER, RJ DUH, JC AF ORON, A DEISSLER, RJ DUH, JC TI MARANGONI INSTABILITY IN A LIQUID LAYER WITH 2 FREE SURFACES SO EUROPEAN JOURNAL OF MECHANICS B-FLUIDS LA English DT Article ID RAYLEIGH-BENARD CONVECTION; POORLY CONDUCTING BOUNDARIES; LARGE CELLS; PATTERNS; GRAVITY; FLOWS AB We study the onset of the Marangoni instability in a liquid layer with two free nearly insulating surfaces healed from below. Linear stability analysis yields a condition for the emergence of a longwave (as usual for most convective phenomena in the limit of nearly insulating boundaries) or a finite wavelength instability from the quiescent equilibrium state. Using the method of asymptotic expansions we derive a weakly nonlinear evolution equation describing the spatiotemporal behavior of the velocity and temperature fields at the onset of the longwave instability. The latter is given by Delta M = 24, Delta M being the difference between the upper and the lower Marangoni numbers. It is shown that in some parametric range one convective cell forms across the layer, while in other parametric domains two superimposed convective cells emerge between the two free surfaces. C1 NASA,LEWIS RES CTR,INST COMPUTAT MECH PROP,CLEVELAND,OH 44135. NASA,LEWIS RES CTR,SVERDRUP TECHNOL INC,CLEVELAND,OH 44135. RP ORON, A (reprint author), TECHNION ISRAEL INST TECHNOL,FAC MECH ENGN,IL-32000 HAIFA,ISRAEL. NR 30 TC 4 Z9 5 U1 1 U2 1 PU GAUTHIER-VILLARS PI MONTROUGE PA DEPT UNIV PROFESSIONNEL REVUES SCIENTIFIQUES TECHNIQUE 11 RUE GOSSIN, F-92543 MONTROUGE, FRANCE SN 0997-7546 J9 EUR J MECH B-FLUID JI Eur. J. Mech. B-Fluids PY 1995 VL 14 IS 6 BP 737 EP 760 PG 24 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA TJ326 UT WOS:A1995TJ32600004 ER PT B AU CAMPBELL, JW HERRMANN, M HAJOS, G SPENCER, S ALEXANDER, R WAITES, H HALL, H FIELDS, JM TAYLOR, CR AF CAMPBELL, JW HERRMANN, M HAJOS, G SPENCER, S ALEXANDER, R WAITES, H HALL, H FIELDS, JM TAYLOR, CR BE Siegmund, OHW Vallerga, JV TI ISIS Fourier telescope concept for imaging the sun and the sky in hard X-rays and gamma rays SO EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI CY JUL 12-14, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE HARD X-RAY ASTRONOMY; HARD X-RAY IMAGING; FOURIER TELESCOPES; SPATIAL MODULATION COLLIMATOR; SPACE SCIENCE MISSION; GAMMA-RAY SPECTROSCOPY; HIGH ENERGY IMAGING; HIGH ENERGY SPECTROSCOPY; ISIS C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. 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 0-8194-1877-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2518 BP 26 EP 38 DI 10.1117/12.218398 PG 13 WC Engineering, Aerospace; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics SC Engineering; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics GA BE21T UT WOS:A1995BE21T00003 ER PT B AU WHITE, NE PETRE, R BOLDT, EA HOLT, SS SERLEMITSOS, PJ MARSHALL, FE STAHLE, CK KELLEY, R ARNAUD, K SZYMKOWIAK, AE MUSHOTZKY, RF SOONG, Y GEHRELS, NA PARSONS, A JAHODA, K SWANK, JH KALLMAN, TR MUKAI, K DRAKE, S GEORGE, IM AF WHITE, NE PETRE, R BOLDT, EA HOLT, SS SERLEMITSOS, PJ MARSHALL, FE STAHLE, CK KELLEY, R ARNAUD, K SZYMKOWIAK, AE MUSHOTZKY, RF SOONG, Y GEHRELS, NA PARSONS, A JAHODA, K SWANK, JH KALLMAN, TR MUKAI, K DRAKE, S GEORGE, IM BE Siegmund, OHW Vallerga, JV TI The Next Generation X-ray Observatory SO EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI CY JUL 12-14, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE X-RAY ASTRONOMY; SPECTROSCOPY; CALORIMETER; GRAZING INCIDENCE OPTICS; MULTILAYERS; MISSION CONCEPT C1 NASA,GODDARD SPACE FLIGHT CTR,HIGH ENERGY PHYS LAB,GREENBELT,MD 20771. RI White, Nicholas/B-6428-2012; Jahoda, Keith/D-5616-2012; Parsons, Ann/I-6604-2012; Kelley, Richard/K-4474-2012 OI White, Nicholas/0000-0003-3853-3462; 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 0-8194-1877-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2518 BP 59 EP 71 DI 10.1117/12.218404 PG 13 WC Engineering, Aerospace; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics SC Engineering; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics GA BE21T UT WOS:A1995BE21T00005 ER PT B AU DIETZ, KL ELSNER, RF JOY, MK ODELL, SL RAMSEY, BD WEISSKOPF, MC ARMSTRONG, TW COLBORN, BL KANVEC, N AF DIETZ, KL ELSNER, RF JOY, MK ODELL, SL RAMSEY, BD WEISSKOPF, MC ARMSTRONG, TW COLBORN, BL KANVEC, N BE Siegmund, OHW Vallerga, JV TI Shielding simulations for the Advanced X-ray Astrophysics Facility (AXAF) SO EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI CY JUL 12-14, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE X-RAY SHIELDING; PHOTON TRANSPORT; PARTICLE TRANSPORT; SIMULATIONS; SPACE MISSIONS; X-RAY ASTRONOMY C1 GEORGE C MARSHALL SPACE FLIGHT CTR,CTR SPACE SCI,HUNTSVILLE,AL 35812. OI O'Dell, Stephen/0000-0002-1868-8056 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 0-8194-1877-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2518 BP 107 EP 118 DI 10.1117/12.218409 PG 12 WC Engineering, Aerospace; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics SC Engineering; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics GA BE21T UT WOS:A1995BE21T00009 ER PT B AU TEEGARDEN, B GEHRELS, N FENIMORE, E BARBIER, L CLINE, T PARSONS, A TUELLER, J KRIZMANIC, J BARTHELMY, S PALMER, D FISHMAN, G KOUVELIOTOU, C HURLEY, K PACIESAS, W VANPARADIJS, J LEVENTHAL, M WOOSLEY, S MCCAMMON, D SANDERS, W SCHAEFER, B BARTLETT, L LISSE, C STAHLE, C AF TEEGARDEN, B GEHRELS, N FENIMORE, E BARBIER, L CLINE, T PARSONS, A TUELLER, J KRIZMANIC, J BARTHELMY, S PALMER, D FISHMAN, G KOUVELIOTOU, C HURLEY, K PACIESAS, W VANPARADIJS, J LEVENTHAL, M WOOSLEY, S MCCAMMON, D SANDERS, W SCHAEFER, B BARTLETT, L LISSE, C STAHLE, C BE Siegmund, OHW Vallerga, JV TI BASIS: A new gamma-ray burst imaging and spectroscopy mission concept SO EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI CY JUL 12-14, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE GAMMA-RAY BURST; CDZNTE DETECTORS; MISSION CONCEPT C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RI Barthelmy, Scott/D-2943-2012; Gehrels, Neil/D-2971-2012; Tueller, Jack/D-5334-2012; Parsons, Ann/I-6604-2012; Lisse, Carey/B-7772-2016 OI Lisse, Carey/0000-0002-9548-1526 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 0-8194-1877-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2518 BP 190 EP 201 DI 10.1117/12.218376 PG 12 WC Engineering, Aerospace; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics SC Engineering; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics GA BE21T UT WOS:A1995BE21T00015 ER PT B AU KIMBLE, R CHEN, P HAAS, JP NORTON, T PAYNE, L CARBONE, J CORBA, M AF KIMBLE, R CHEN, P HAAS, JP NORTON, T PAYNE, L CARBONE, J CORBA, M BE Siegmund, OHW Vallerga, JV TI Progress toward a photon-counting intensified CID detector SO EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI CY JUL 12-14, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE CIDS; DETECTORS; INTENSIFIERS; MICROCHANNEL PLATES; PHOTON-COUNTING C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. 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 0-8194-1877-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2518 BP 397 EP 409 DI 10.1117/12.218392 PG 13 WC Engineering, Aerospace; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics SC Engineering; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics GA BE21T UT WOS:A1995BE21T00034 ER PT B AU KOLODZIEJCZAK, JJ RAMSEY, BD AF KOLODZIEJCZAK, JJ RAMSEY, BD BE Siegmund, OHW Vallerga, JV TI Performance of a liquid xenon microstrip proportional counter SO EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI CY JUL 12-14, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,UNIV SPACE RES ASSOC,HUNTSVILLE,AL 35812. 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 0-8194-1877-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2518 BP 478 EP 482 DI 10.1117/12.218396 PG 5 WC Engineering, Aerospace; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics SC Engineering; Astronomy & Astrophysics; Instruments & Instrumentation; Remote Sensing; Optics GA BE21T UT WOS:A1995BE21T00040 ER PT J AU WATMUFF, JH AF WATMUFF, JH TI HIGH-SPEED REAL-TIME PROCESSING OF CROSS-WIRE DATA SO EXPERIMENTAL THERMAL AND FLUID SCIENCE LA English DT Article DE CROSS WIRE; CALIBRATION; LOOK-UP TABLE; DOUBLE-BUFFERED; REAL-TIME PROCESSING; TURBULENCE; REYNOLDS STRESS ID TURBULENCE AB A method is described for processing cross-wire data at high speed in real time. The basis for the high speed is the assumption of simple cosine cooling for the heat transfer because the expression for the effective cooling velocity is reduced to a linear function of the applied velocity components. The calibration inversion is greatly simplified because the measurements are linearly dependent on the effective cooling velocity of each wire, which can be expressed uniquely in terms of a single variable such as output voltage. This makes it practical to use a pair of one-dimensional look-up table arrays such that the number of elements corresponds exactly to the measurement resolution over the full range. This is the fastest possible method because the word returned by the analog-to-digital converter can be used directly as the index of the array and linear interpolation is avoided. It is shown that it is unnecessary to calculate U and V for each pair of cross-wire samples when Reynolds stress and triple products are required, and this further reduces the number of floating-point calculations. Finally, the method has been implemented in a true double-buffered scheme in which there is a high degree of parallelism between the data acquisition and data processing calculations. The parallelism means that the extra experimental run time introduced by the data processing calculations is only minimal. Although the method assumes simple cosine cooling, the difference (typically 2-degrees or 3-degrees) between the effective wire angle obtained by neglecting the longitudinal cooling component and the actual wire angle provides compensation. The errors are less than 2% for typical wires and flow angles less than 25-degrees. The results of a Monte Carlo simulation indicate that the errors are only slightly larger than the errors observed when the longitudinal cooling component is fully accounted for. The method is suitable for flows in which the turbulence intensity is moderately high. RP WATMUFF, JH (reprint author), NASA,AMES RES CTR,MCAT INST,MAIL STOP 260-1,MOFFETT FIELD,CA 94035, USA. NR 16 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE PUBL CO INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0894-1777 J9 EXP THERM FLUID SCI JI Exp. Therm. Fluid Sci. PD JAN PY 1995 VL 10 IS 1 BP 74 EP 85 DI 10.1016/0894-1777(94)00063-E PG 12 WC Thermodynamics; Engineering, Mechanical; Physics, Fluids & Plasmas SC Thermodynamics; Engineering; Physics GA QF326 UT WOS:A1995QF32600007 ER PT J AU HARRISON, PR HARRISON, PA KIMES, DS AF HARRISON, PR HARRISON, PA KIMES, DS TI VEG - INTELLIGENT WORKBENCH FOR STUDYING EARTHS VEGETATION SO EXPERT SYSTEMS WITH APPLICATIONS LA English DT Article ID LEARNING CLASS DESCRIPTIONS; HEMISPHERICAL REFLECTANCE; SPECTRAL REFLECTANCE; EXPERT SYSTEM; DATA-BASE; ALBEDO; SURFACE AB The purpose of this paper is to describe VEG, an intelligent workbench for remote sensing scientists. VEG assists scientists in the analysis of optical reflectance data. VEG was designed to manage complexity, provide intelligent support, provide visualization tools, and contract the time required for a scientist studying the earth's vegetation to run exploratory studies, test alternative hypotheses, do what if thinking, and manage large data sets. VEG organizes and provides coherence to a diverse set of techniques and tools that are used by these scientists. It codifies in knowledge-based system components, heuristic knowledge used by these scientists when doing scientific work. The VEG system saves the scientist many hours of laborious calculation, and it empowers the scientist by allowing him or her to work quickly at a higher level of abstraction without the need to focus attention on a multitude of low-level tasks. The VEG system includes rule-based components, data management tools, technique design and management tools, browsers, graphics support, a highly visual interface, and a system for organizing and managing problem histories. C1 INTELLICORP INC,MCLEAN,VA 22102. USN ACAD,ANNAPOLIS,MD 21402. NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 12 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0957-4174 J9 EXPERT SYST APPL JI Expert Syst. Appl. PY 1995 VL 9 IS 2 BP 135 EP 151 DI 10.1016/0957-4174(94)00057-3 PG 17 WC Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic; Operations Research & Management Science SC Computer Science; Engineering; Operations Research & Management Science GA TA809 UT WOS:A1995TA80900005 ER PT J AU LIEBOWITZ, J POTTER, WE AF LIEBOWITZ, J POTTER, WE TI SCHEDULING OBJECTIVES, REQUIREMENTS, RESOURCES, CONSTRAINTS, AND PROCESSES - IMPLICATIONS FOR A GENERIC EXPERT SCHEDULING SYSTEM ARCHITECTURE AND TOOLKIT SO EXPERT SYSTEMS WITH APPLICATIONS LA English DT Article AB Scheduling has become an increasingly important element in today's society and workplace. Within the NASA environment, scheduling is one of the most frequently performed functions. Towards meeting NASA's scheduling challenges, there is a great need for developing a generic expert scheduling system architecture and toolkit. This paper examines objectives, requirements, resources, constraints, and processes associated with the scheduling domain. Implications for a generic expert scheduling system architecture and toolkit are then discussed. C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RP LIEBOWITZ, J (reprint author), AMER MINOR ENGN CORP,10422 ARMORY AVE,POB 509,KENSINGTON,MD, USA. NR 28 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 0957-4174 J9 EXPERT SYST APPL JI Expert Syst. Appl. PY 1995 VL 9 IS 3 BP 423 EP 432 DI 10.1016/0957-4174(95)98744-4 PG 10 WC Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic; Operations Research & Management Science SC Computer Science; Engineering; Operations Research & Management Science GA TE261 UT WOS:A1995TE26100013 ER PT S AU DEBERGH, C BEZARD, B CRISP, D MAILLARD, JP OWEN, T POLLACK, J GRINSPOON, D AF DEBERGH, C BEZARD, B CRISP, D MAILLARD, JP OWEN, T POLLACK, J GRINSPOON, D BE Keating, GM TI WATER IN THE DEEP ATMOSPHERE OF VENUS FROM HIGH-RESOLUTION SPECTRA OF THE NIGHT SIDE SO EXPLORATION OF VENUS AND MARS ATMOSPHERES SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT Symposium of COSPAR Interdisciplinary-Scientific-Commission C - Atmospheres of Venus and Mars, at the COSPAR 29th Plenary Meeting CY AUG 28-SEP 05, 1992 CL WASHINGTON, DC SP COMM SPACE RES, INTERDISCIPLINARY SCI COMMISS C ID DARK SIDE; BAND AB High-resolution, near-infrared (1.09 to 2.5 mu m) spectra of the night side of Venus have been obtained in 1990 and 1991 using the Fourier Transform Spectrometer at the 3.6-m Canada-France-Hawaii telescope. Absorptions due to H2O were detected in spectral windows near 2.3, 1.74, and 1.18 mu m. Our analysis of these absorptions constrains the abundance of water vapor in three different altitude ranges located between the clouds and the surface : 30-40 km, 15-25 km and 0-15 km. A constant water vapor mixing ratio of 30 +/- 15 ppm below the clouds can fit the observations. These values are consistent with recent near-infrared studies of the night side of Venus at lower spectral resolution. The atmosphere of Venus appears to be dryer than originally suggested by the in-situ measurements made by the Pioneer Venus and Venera mass-spectrometers and gas-chromatographs. C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. INST ASTROPHYS,F-75014 PARIS,FRANCE. UNIV HAWAII,INST ASTRON,HONOLULU,HI 96822. NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. UNIV COLORADO,BOULDER,CO 80309. RP DEBERGH, C (reprint author), OBSERV PARIS,F-92195 MEUDON,FRANCE. NR 22 TC 52 Z9 52 U1 0 U2 2 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042552-6 J9 ADV SPACE RES PY 1995 VL 15 IS 4 BP 79 EP 88 DI 10.1016/0273-1177(94)00067-B PG 10 WC Geosciences, Multidisciplinary SC Geology GA BD12M UT WOS:A1995BD12M00008 ER PT S AU HARTLE, RE GREBOWSKY, JM AF HARTLE, RE GREBOWSKY, JM BE Keating, GM TI PLANETARY LOSS FROM LIGHT-ION ESCAPE ON VENUS SO EXPLORATION OF VENUS AND MARS ATMOSPHERES SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT Symposium of COSPAR Interdisciplinary-Scientific-Commission C - Atmospheres of Venus and Mars, at the COSPAR 29th Plenary Meeting CY AUG 28-SEP 05, 1992 CL WASHINGTON, DC SP COMM SPACE RES, INTERDISCIPLINARY SCI COMMISS C ID IONOSPHERE; ORBITER; THERMOSPHERE; DEUTERIUM; HYDROGEN; MODEL AB Using Pioneer Venus data, hydrogen and deuterium ions are shown to escape from the hydrogen bulge region in die nightside ionosphere. The polarization electric field propels these light ions upward through the ionosphere and into the ion-exosphere, where H+ and D+ continue to be accelerated away from Venus and move into the ionotail and beyond. The vertical flow speeds of H+ and D+ are found to be about the same; therefore, selective escape between H+ and D+ is negligible for this mechanism. Present day planetary loss rates of about 8.6x10(25) s(-1) and 3.2x10(23) s(-1) were obtained for H+ and D+, respectively. Such rates, persisting over a few billion years, should have significantly affected the planetary water budget. RP HARTLE, RE (reprint author), NASA,GODDARD SPACE FLIGHT CTR,PLANETARY SYST BRANCH,CODE 914,GREENBELT,MD 20771, USA. RI Grebowsky, Joseph/I-7185-2013 NR 22 TC 19 Z9 19 U1 0 U2 1 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042552-6 J9 ADV SPACE RES PY 1995 VL 15 IS 4 BP 117 EP 122 DI 10.1016/0273-1177(94)00073-A PG 6 WC Geosciences, Multidisciplinary SC Geology GA BD12M UT WOS:A1995BD12M00014 ER PT S AU DUBIN, M SOBERMAN, RK AF DUBIN, M SOBERMAN, RK BE Keating, GM TI GENERATION OF VENUS NIGHTSIDE IONOSPHERIC STRUCTURE BY PARTICLE STREAMS FROM COSMOIDS SO EXPLORATION OF VENUS AND MARS ATMOSPHERES SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT Symposium of COSPAR Interdisciplinary-Scientific-Commission C - Atmospheres of Venus and Mars, at the COSPAR 29th Plenary Meeting CY AUG 28-SEP 05, 1992 CL WASHINGTON, DC SP COMM SPACE RES, INTERDISCIPLINARY SCI COMMISS C ID MESOSPHERIC FE; SIGNALS; LAYERS; REGION; ION AB A newly discovered source of energetic particle streams directed at Venus' nightside may cause several exosphere phenomena. The streams evolve from dispersed cosmoids, a surreptitious population of meteoroids in nearly hyperbolic orbits, measured with three dust experiments on Pioneer 10/11. Loose fragile comet like ensembles of frozen volatile material, they are orders of magnitude more populous than short period meteoroids. Dispersion is forced near a planet masking the meteor signature at Earth, but recently terrestrial exosphere interactions have been detected principally from VLF radar returns and as suddenly formed layers of neutral sodium and iron probed by lidar. Venus influx is estimated > 10(-14)g . cm(-2). s(-1) with nightside directed kinetic power of > 0.3 erg . cm(-2). s(-1). Compared to Earth, Venus, lacking a dipole field with almost no rotation, has a readily recognized set of nightside interaction signatures of these downward energetic particle streams: i.e., density depressions of the neutral thermosphere, hydrogen and helium bulges, a non- disappearing ionosphere, electron holes, nightglows, VLF bursty signals, and local magnetic fields. From PVO measurements, the cosmoid population, its temporal and solar azimuthal variation may be determined. C1 UNIV PENN,DEPT ASTRON,PHILADELPHIA,PA 19104. RP DUBIN, M (reprint author), NASA,GODDARD SPACE FLIGHT CTR,ATMOSPHERES LAB,GREENBELT,MD 20771, USA. NR 28 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042552-6 J9 ADV SPACE RES PY 1995 VL 15 IS 4 BP 123 EP 129 DI 10.1016/0273-1177(94)00074-B PG 7 WC Geosciences, Multidisciplinary SC Geology GA BD12M UT WOS:A1995BD12M00015 ER PT B AU GEHRELS, N CHEUNG, C AF GEHRELS, N CHEUNG, C BE Calzetti, D Livio, M Madau, P TI Extragalactic gamma-ray background SO EXTRAGALACTIC BACKGROUND RADIATION: A MEETING IN HONOR OF RICCADO GIACCONI SE SPACE TELESCOPE SCIENCE INSTITUTE SYMPOSIUM SERIES LA English DT Proceedings Paper CT Extragalactic Background Radiation Meeting, in Honor of Riccardo Giacconi CY MAY 18-20, 1993 CL SPACE TELESCOPE SCI INST, BALTIMORE, MD HO SPACE TELESCOPE SCI INST C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RI Gehrels, Neil/D-2971-2012 NR 0 TC 2 Z9 2 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-49558-X J9 SPACE TEL S PY 1995 VL 7 BP 15 EP 35 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD66D UT WOS:A1995BD66D00002 ER PT B AU HAUSER, MG AF HAUSER, MG BE Calzetti, D Livio, M Madau, P TI Infrared background (observations) SO EXTRAGALACTIC BACKGROUND RADIATION: A MEETING IN HONOR OF RICCADO GIACCONI SE SPACE TELESCOPE SCIENCE INSTITUTE SYMPOSIUM SERIES LA English DT Proceedings Paper CT Extragalactic Background Radiation Meeting, in Honor of Riccardo Giacconi CY MAY 18-20, 1993 CL SPACE TELESCOPE SCI INST, BALTIMORE, MD HO SPACE TELESCOPE SCI INST C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 3 Z9 3 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-49558-X J9 SPACE TEL S PY 1995 VL 7 BP 135 EP 144 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD66D UT WOS:A1995BD66D00007 ER PT B AU MATHER, JC AF MATHER, JC BE Calzetti, D Livio, M Madau, P TI Microwave background radiation (observations) SO EXTRAGALACTIC BACKGROUND RADIATION: A MEETING IN HONOR OF RICCADO GIACCONI SE SPACE TELESCOPE SCIENCE INSTITUTE SYMPOSIUM SERIES LA English DT Proceedings Paper CT Extragalactic Background Radiation Meeting, in Honor of Riccardo Giacconi CY MAY 18-20, 1993 CL SPACE TELESCOPE SCI INST, BALTIMORE, MD HO SPACE TELESCOPE SCI INST C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 2 Z9 2 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1RP BN 0-521-49558-X J9 SPACE TEL S PY 1995 VL 7 BP 169 EP 190 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD66D UT WOS:A1995BD66D00009 ER PT J AU Moore, TA Okumura, M Tagawa, M Minton, TK AF Moore, TA Okumura, M Tagawa, M Minton, TK TI Dissociation dynamics of ClONO2 and relative Cl and ClO product yields following photoexcitation at 308 nm SO FARADAY DISCUSSIONS LA English DT Article; Proceedings Paper CT Faraday Disussions on Atmospheric Chemistry - Measurements, Mechanics and Models CY APR 19-21, 1995 CL UNIV E ANGLIA, E ANGLIA, ENGLAND SP Royal Soc Chem, Faraday Div HO UNIV E ANGLIA ID TRIATOMIC PHOTOFRAGMENT SPECTRA; CHLORINE NITRATE; NO2 PHOTODISSOCIATION; PHOTOLYSIS AB Chlorine nitrate photolysis at 308 nm has been investigated with a molecular beam technique. Two primary decomposition pathways, leading to Cl + NO3 and ClO + NO2, were observed. The branching ratio between these two respective channels was determined to be 0.67 +/- 0.06:0.33 +/- 0.06. This ratio is an upper limit because some of the ClO photoproducts may have undergone secondary photodissociation. The angular distributions of the photoproducts with respect to the direction of polarization of the exciting light were anisotropic. The anisotropy parameters were beta = 0.5 +/- 0.2 for the Cl + NO3 channel and beta = 1.1 +/- 0.2 for the ClO + NO2 channel, indicating that dissociation of ClONO2 by either pathway occurs within a rotational period. Weak signal at mass-to-charge ratios of 35 and 51, arising from products with laboratory velocities close to the beam velocity, was observed. While this signal could result from statistical dissociation channels with a total relative yield of 0.07 or less, it is more likely attributable to products from ClO secondary photodissociation or from dissociation of clusters. C1 CALTECH, JET PROP LAB, PASADENA, CA 91109 USA. MONTANA STATE UNIV, CTR BIOFILM ENGN, BOZEMAN, MT 59717 USA. MONTANA STATE UNIV, DEPT CHEM & BIOCHEM, BOZEMAN, MT 59717 USA. RP Moore, TA (reprint author), CALTECH, ARTHUR AMOS NOYES LAB CHEM PHYS, PASADENA, CA 91125 USA. RI Okumura, Mitchio/I-3326-2013 OI Okumura, Mitchio/0000-0001-6874-1137 NR 30 TC 14 Z9 14 U1 0 U2 3 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0301-7249 J9 FARADAY DISCUSS JI Faraday Discuss. PY 1995 VL 100 BP 295 EP 307 DI 10.1039/fd9950000295 PG 13 WC Chemistry, Physical SC Chemistry GA UE939 UT WOS:A1995UE93900018 ER PT J AU Pyle, JA Chipperfield, MP KilbaneDawe, I Lee, AM Stimpfle, RM Kohn, D Renger, W Waters, JW AF Pyle, JA Chipperfield, MP KilbaneDawe, I Lee, AM Stimpfle, RM Kohn, D Renger, W Waters, JW TI Early modelling results from the SESAME and ASHOE campaigns SO FARADAY DISCUSSIONS LA English DT Article; Proceedings Paper CT Faraday Disussions on Atmospheric Chemistry - Measurements, Mechanics and Models CY APR 19-21, 1995 CL UNIV E ANGLIA, E ANGLIA, ENGLAND SP Royal Soc Chem, Faraday Div HO UNIV E ANGLIA ID OZONE; ATMOSPHERE AB Data from the second European stratospheric arctic and middle latitude experiment (SESAME) and the airborne southern hemisphere ozone experiment (ASHOE) (recent campaigns in both hemispheres), and from the upper atmosphere research satellite (UARS) provide information about the movement, and possible mixing, of stratospheric air from the vortex and vortex edge into middle latitudes. Model studies reported here reproduce the observed features and may provide insight into their larger-scale structure. It is now clear that filaments of activated air, removed from the vortex edge, contribute to the observed decline of ozone in middle latitudes. C1 DEUTSCH FORSCH ANSTALT LUFT & RAUMFAHRT, OBERPFAFFENHOFEN, GERMANY. CALTECH, JET PROP LAB, PASADENA, CA USA. HARVARD UNIV, CAMBRIDGE, MA 02138 USA. RP Pyle, JA (reprint author), UNIV CAMBRIDGE, DEPT CHEM, CTR ATMOSPHER SCI, LENSFIELD RD, CAMBRIDGE CB2 1EW, ENGLAND. RI Chipperfield, Martyn/H-6359-2013 OI Chipperfield, Martyn/0000-0002-6803-4149 NR 21 TC 14 Z9 14 U1 0 U2 0 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0301-7249 J9 FARADAY DISCUSS JI Faraday Discuss. PY 1995 VL 100 BP 371 EP 387 DI 10.1039/fd9950000371 PG 17 WC Chemistry, Physical SC Chemistry GA UE939 UT WOS:A1995UE93900023 ER PT S AU Sejersted, OM Hargens, AR AF Sejersted, OM Hargens, AR BE Gandevia, SC Enoka, RM McComas, AJ Stuart, DG Thomas, CK TI Intramuscular pressures for monitoring different tasks and muscle conditions SO FATIGUE: NEURAL AND MUSCULAR MECHANISMS SE ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY LA English DT Proceedings Paper CT Symposium on Neural and Neuromuscular Aspects of Muscular Fatigue, at the Annual Meeting of the Society-for-Neuroscience CY NOV 10-13, 1994 CL MIAMI, FL SP Soc Neurosci ID INTERSTITIAL FLUID PRESSURE; CHRONIC COMPARTMENT SYNDROME; SKELETAL-MUSCLE; BLOOD-FLOW; RESPIRATORY CHANGES; EXERCISE; CONTRACTION; DIAGNOSIS; FORCE; LEG AB Intramuscular fluid pressure (IMP) can easily be measured in man and animals. It follows the law of Laplace which means that it is determined by the tension of the muscle fibers, the recording depth and by fiber geometry (fiber curvature or pennation angle). Thick, bulging muscles create high IMPs (up to 1000 mmHg) and force transmission to tendons becomes inefficient. High resting or postexercise IMPs are indicative of a compartment syndrome due to muscle swelling within a low-compliance osseofascial boundary. IMP increases linearly with force (torque) independent of the mode or speed of contraction (isometric, eccentric, concentric). IMP is also a much better predictor of muscle force than the EMG signal. During prolonged low-force isometric contractions, cyclic variations in IMP are seen. Since IMP influences muscle blood flow through the muscle pump, autoregulating Vascular elements, and compression of the intramuscular vasculature, alterations in IMP have important implications for muscle function. C1 NASA,AMES RES CTR,GRAVITAT RES BRANCH,MOFFETT FIELD,CA 94035. RP Sejersted, OM (reprint author), UNIV OSLO,ULLEVAAL HOSP,EXPTL MED RES INST,N-0407 OSLO,NORWAY. RI Sejersted, Ole/D-5601-2009 OI Sejersted, Ole/0000-0001-8817-3296 NR 56 TC 35 Z9 35 U1 0 U2 2 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0065-2598 BN 0-306-45139-5 J9 ADV EXP MED BIOL JI Adv.Exp.Med.Biol. PY 1995 VL 384 BP 339 EP 350 PG 12 WC Medicine, Research & Experimental; Neurosciences SC Research & Experimental Medicine; Neurosciences & Neurology GA BE37Y UT WOS:A1995BE37Y00027 PM 8585463 ER PT S AU DRACHMAN, RJ BHATIA, AK AF DRACHMAN, RJ BHATIA, AK BE Gross, F TI Rydberg levels of lithium SO FEW-BODY PROBLEMS IN PHYSICS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT XIVth International Conference on Few Body Problems in Physics CY MAY 26-31, 1994 CL COLL WILLIAM & MARY, WILLIAMSBURG, VA SP Int Union Pure & Appl Phys, US DOE, US Natl Sci Fdn HO COLL WILLIAM & MARY C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-325-6 J9 AIP CONF PROC PY 1995 IS 334 BP 671 EP 674 PG 4 WC Physics, Particles & Fields; Physics, Mathematical SC Physics GA BD69R UT WOS:A1995BD69R00102 ER PT B AU PALANIAPPAN, K KAMBHAMETTU, C HASLER, AF GOLDGOF, DB AF PALANIAPPAN, K KAMBHAMETTU, C HASLER, AF GOLDGOF, DB GP IEEE TI Structure and semi-fluid motion analysis of stereoscopic satellite images for cloud tracking SO FIFTH INTERNATIONAL CONFERENCE ON COMPUTER VISION, PROCEEDINGS LA English DT Proceedings Paper CT 5th International Conference on Computer Vision CY JUN 20-23, 1995 CL MIT, CAMBRIDGE, MA SP IEEE Comp Soc Tech Comm Pattern Anal & Machine Intelligence HO MIT C1 NASA,GODDARD SPACE FLIGHT CTR,UNIV SPACE RES ASSOC,ATMOSPHERES LAB,GREENBELT,MD 20771. NR 0 TC 14 Z9 17 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 0-8186-7042-8 PY 1995 BP 659 EP 665 DI 10.1109/ICCV.1995.466773 PG 3 WC Automation & Control Systems; Computer Science, Artificial Intelligence; Computer Science, Theory & Methods; Neurosciences; Optics; Psychology SC Automation & Control Systems; Computer Science; Neurosciences & Neurology; Optics; Psychology GA BD71W UT WOS:A1995BD71W00095 ER PT S AU JAIN, RK WILT, DM LANDIS, GA JAIN, R WEINBERG, I FLOOD, DJ AF JAIN, RK WILT, DM LANDIS, GA JAIN, R WEINBERG, I FLOOD, DJ BE Coutts, TJ Benner, JP TI MODELING OF LOW-BANDGAP SOLAR CELLS FOR THERMOPHOTOVOLTAIC APPLICATIONS SO FIRST NREL CONFERENCE ON THEROMOPHOTOVOLTIC GENERATION OF ELECTRICITY SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1st NREL Conference on Thermophotovoltaic Generation of Electricity CY 1994 CL COPPER MT, CO SP NATL RENEWABLE ENERGY LAB DIRECTORS DEV FUND, US DOE, US DOE, OFF ENERGY EFFICIENCY & RENEWABLE ENERGY, NATL PHOTOVOLTAICS PROGRA, M C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 2 Z9 2 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-353-1 J9 AIP CONF PROC PY 1995 IS 321 BP 202 EP 209 PG 8 WC Electrochemistry; Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied SC Electrochemistry; Energy & Fuels; Engineering; Physics GA BC86L UT WOS:A1995BC86L00021 ER PT S AU WILT, DM FATEMI, NS HOFFMAN, RW JENKINS, PP SCHEIMAN, D LOWE, R LANDIS, GA AF WILT, DM FATEMI, NS HOFFMAN, RW JENKINS, PP SCHEIMAN, D LOWE, R LANDIS, GA BE Coutts, TJ Benner, JP TI INGAAS PV DEVICE DEVELOPMENT FOR TPV POWER SYSTEMS SO FIRST NREL CONFERENCE ON THEROMOPHOTOVOLTIC GENERATION OF ELECTRICITY SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1st NREL Conference on Thermophotovoltaic Generation of Electricity CY 1994 CL COPPER MT, CO SP NATL RENEWABLE ENERGY LAB DIRECTORS DEV FUND, US DOE, US DOE, OFF ENERGY EFFICIENCY & RENEWABLE ENERGY, NATL PHOTOVOLTAICS PROGRA, M C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-353-1 J9 AIP CONF PROC PY 1995 IS 321 BP 210 EP 220 PG 11 WC Electrochemistry; Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied SC Electrochemistry; Energy & Fuels; Engineering; Physics GA BC86L UT WOS:A1995BC86L00022 ER PT S AU CHUBB, DL LOWE, RA GOOD, BS AF CHUBB, DL LOWE, RA GOOD, BS BE Coutts, TJ Benner, JP TI EMITTANCE THEORY FOR THIN FILM SELECTIVE EMITTER SO FIRST NREL CONFERENCE ON THEROMOPHOTOVOLTIC GENERATION OF ELECTRICITY SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1st NREL Conference on Thermophotovoltaic Generation of Electricity CY 1994 CL COPPER MT, CO SP NATL RENEWABLE ENERGY LAB DIRECTORS DEV FUND, US DOE, US DOE, OFF ENERGY EFFICIENCY & RENEWABLE ENERGY, NATL PHOTOVOLTAICS PROGRA, M C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-353-1 J9 AIP CONF PROC PY 1995 IS 321 BP 229 EP 244 PG 16 WC Electrochemistry; Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied SC Electrochemistry; Energy & Fuels; Engineering; Physics GA BC86L UT WOS:A1995BC86L00024 ER PT S AU GOOD, BS CHUBB, DL LOWE, RA AF GOOD, BS CHUBB, DL LOWE, RA BE Coutts, TJ Benner, JP TI TEMPERATURE-DEPENDENT EFFICIENCY CALCULATIONS FOR A THIN-FILM SELECTIVE EMITTER SO FIRST NREL CONFERENCE ON THEROMOPHOTOVOLTIC GENERATION OF ELECTRICITY SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1st NREL Conference on Thermophotovoltaic Generation of Electricity CY 1994 CL COPPER MT, CO SP NATL RENEWABLE ENERGY LAB DIRECTORS DEV FUND, US DOE, US DOE, OFF ENERGY EFFICIENCY & RENEWABLE ENERGY, NATL PHOTOVOLTAICS PROGRA, M C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-353-1 J9 AIP CONF PROC PY 1995 IS 321 BP 263 EP 275 PG 13 WC Electrochemistry; Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied SC Electrochemistry; Energy & Fuels; Engineering; Physics GA BC86L UT WOS:A1995BC86L00026 ER PT S AU BURGER, DR MUELLER, RL AF BURGER, DR MUELLER, RL BE Coutts, TJ Benner, JP TI CHARACTERIZATION OF THERMOPHOTOVOLTAIC CELLS SO FIRST NREL CONFERENCE ON THEROMOPHOTOVOLTIC GENERATION OF ELECTRICITY SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1st NREL Conference on Thermophotovoltaic Generation of Electricity CY 1994 CL COPPER MT, CO SP NATL RENEWABLE ENERGY LAB DIRECTORS DEV FUND, US DOE, US DOE, OFF ENERGY EFFICIENCY & RENEWABLE ENERGY, NATL PHOTOVOLTAICS PROGRA, M C1 JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AIP PRESS PI WOODBURY PA AMERICAN INSTITUTE OF PHYSICS 500 SUNNYSIDE BOULEVARD, WOODBURY, NY 11797-2999 SN 0094-243X BN 1-56396-353-1 J9 AIP CONF PROC PY 1995 IS 321 BP 457 EP 472 PG 16 WC Electrochemistry; Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied SC Electrochemistry; Energy & Fuels; Engineering; Physics GA BC86L UT WOS:A1995BC86L00042 ER PT J AU CARLS, MG OCLAIR, CE AF CARLS, MG OCLAIR, CE TI RESPONSES OF TANNER CRABS, CHIONOECETES-BAIRDI, EXPOSED TO COLD-AIR SO FISHERY BULLETIN LA English DT Article ID LOBSTER AB Female and sublegal-size male Tanner crabs, Chionoecetes bairdi, are often caught incidentally in the males-only fishery for this species. Effects of low air temperature during the winter fishery on juvenile and female adult crabs and on the developing eggs brooded by the females were simulated in the laboratory by exposing crabs to cold air (-20 to +5-degrees-C) up to 32 minutes; controls were not exposed. Exposure was expressed as degree.hours (degrees-h), the product of temperature (degrees-C) and time (hours). Severe exposure caused death: median lethal exposure stabilized at -3.3 +/- 0.8-degrees-h for juveniles and -4.3 +/- 0.5-degrees-h for adults after 16 days. Exposure also reduced vigor (measured by righting ability), caused pereiopod autotomy, and depressed adult feeding rates and juvenile growth. Exposures causing one-half the crabs to cease righting were -1.2 +/- 0.3-degrees-h for juveniles and -2.1 +/- 0.3-degrees-h for adults (measured immediately after exposure). Mean pereiopod autotomy ranged up to 44% for juveniles exposed to -2-degrees-h, and up to 10% for adults exposed to -10.6-degrees-h. Ecdysis of juveniles was not affected, but exposed juveniles frequently shed additional pereiopods with the molt. Prompt return of incidentally caught Tanner crabs to the sea when temperatures are below freezing should reduce adverse effects of cold aerial exposure. RP CARLS, MG (reprint author), NOAA,NATL MARINE FISHERIES SERV,ALASKA FISHERIES SCI CTR,AUKE BAY LAB,11305 GLACIER HIGHWAY,JUNEAU,AK 99801, USA. NR 13 TC 15 Z9 15 U1 0 U2 1 PU NATL MARINE FISHERIES SERVICE SCIENTIFIC PUBL OFFICE PI SEATTLE PA 7600 SAND POINT WAY NE BIN C15700, SEATTLE, WA 98115 SN 0090-0656 J9 FISH B-NOAA JI Fish. Bull. PD JAN PY 1995 VL 93 IS 1 BP 44 EP 56 PG 13 WC Fisheries SC Fisheries GA PZ982 UT WOS:A1995PZ98200004 ER PT J AU ELLIS, DM DEMARTINI, EE AF ELLIS, DM DEMARTINI, EE TI EVALUATION OF A VIDEO CAMERA TECHNIQUE FOR INDEXING ABUNDANCES OF JUVENILE PINK SNAPPER, PRISTIPOMOIDES-FILAMENTOSUS, AND OTHER HAWAIIAN INSULAR SHELF FISHES SO FISHERY BULLETIN LA English DT Article ID TRACKING; BEHAVIOR; BIOMASS; OCEAN AB Bottom longline and baited video camera operations were conducted at 39 stations off the Hawaiian Islands of Oahu, Maui, and Kauai during 1992. Objectives of the 1992 cruise were to assess the precision, accuracy, and efficiency of a video camera system versus a traditional abundance index (longline catch per unit of effort [CPUE]) for juvenile pink snapper (''opakapaka''), Pristipomoides filamentosus, a commercially important eteline snapper in Hawaii. Precision of the video samples was reevaluated with data from 18 stations sampled during 1993 off Kaneohe Bay. The video index of the maximum number of opakapaka observed (MAXNO, the natural log-transformed mean of three camera drops) was best correlated with the log of longline CPUE (r=0.79, P<0.001, n=15). Variation in the data for video MAXNO was nominally less than that of the longline CPUE. No monotone trend over stations was noted in samples from 1993. Sample sizes of 33 stations for longline and 18 stations for video would be necessary to detect two-fold changes in abundance of opakapaka at a site, based on our analysis of the two end positions of the 10 windward Oahu stations that had three quantitative deployments. Reanalysis of power with data from the 1993 cruise indicates that a sample size of approximately 22 stations (alpha2=0.05) or approximately 17 stations (alpha2=0.1) would be necessary to detect twofold changes. RP ELLIS, DM (reprint author), NOAA,NATL MARINE FISHERIES SERV,SW FISHERIES CTR,HONOLULU LAB,2570 DOLE ST,HONOLULU,HI 96822, USA. NR 33 TC 71 Z9 74 U1 1 U2 14 PU NATL MARINE FISHERIES SERVICE SCIENTIFIC PUBL OFFICE PI SEATTLE PA 7600 SAND POINT WAY NE BIN C15700, SEATTLE, WA 98115 SN 0090-0656 J9 FISH B-NOAA JI Fish. Bull. PD JAN PY 1995 VL 93 IS 1 BP 67 EP 77 PG 11 WC Fisheries SC Fisheries GA PZ982 UT WOS:A1995PZ98200006 ER PT S AU Benz, FJ AF Benz, FJ BE Janoff, DD Royals, WT Gunaji, MV TI ASTM G-4 twenty-year report card: Keynote address SO FLAMMABILITY AND SENSITIVITY OF MATERIALS IN OXYGEN-ENRICHED ATMOSPHERES: SEVENTH VOLUME SE AMERICAN SOCIETY FOR TESTING AND MATERIALS SPECIAL TECHNICAL PUBLICATION LA English DT Proceedings Paper CT Symposium on Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres CY MAR 16-17, 1995 CL DENVER, CO SP ASTM Comm G 4 Compatib & Sensitiv Mat Oxygen Enriched Atmospheres DE standardization; guidelines; practices; education; progress; oxygen-enriched; nonmetallic; metals; materials C1 NASA,LYNDON B JOHNSON SPACE CTR,WHITE SANDS TEST FACIL,LAS CRUCES,NM 88004. NR 0 TC 0 Z9 0 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 0-8031-2004-4 J9 AM SOC TEST MATER PY 1995 VL 1267 BP 1 EP 8 DI 10.1520/STP16422S PG 8 WC Chemistry, Inorganic & Nuclear; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA BE80R UT WOS:A1995BE80R00002 ER PT S AU Yentzen, MJ AF Yentzen, MJ BE Janoff, DD Royals, WT Gunaji, MV TI Design of the LOX and GOX systems for the Stennis Space Center high heat flux facility SO FLAMMABILITY AND SENSITIVITY OF MATERIALS IN OXYGEN-ENRICHED ATMOSPHERES: SEVENTH VOLUME SE AMERICAN SOCIETY FOR TESTING AND MATERIALS SPECIAL TECHNICAL PUBLICATION LA English DT Proceedings Paper CT Symposium on Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres CY MAR 16-17, 1995 CL DENVER, CO SP ASTM Comm G 4 Compatib & Sensitiv Mat Oxygen Enriched Atmospheres DE liquid oxygen; gaseous oxygen; components; piping; design principles C1 NASA,SYST ENGN DIV,BAY ST LOUIS,MS 39529. NR 0 TC 1 Z9 1 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 0-8031-2004-4 J9 AM SOC TEST MATER PY 1995 VL 1267 BP 36 EP 56 DI 10.1520/STP16425S PG 21 WC Chemistry, Inorganic & Nuclear; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA BE80R UT WOS:A1995BE80R00005 ER PT S AU Jain, A Gunaji, MV Bryan, CJ AF Jain, A Gunaji, MV Bryan, CJ BE Janoff, DD Royals, WT Gunaji, MV TI Evaluation of the compatibility of materials used in breathing-air devices SO FLAMMABILITY AND SENSITIVITY OF MATERIALS IN OXYGEN-ENRICHED ATMOSPHERES: SEVENTH VOLUME SE AMERICAN SOCIETY FOR TESTING AND MATERIALS SPECIAL TECHNICAL PUBLICATION LA English DT Proceedings Paper CT Symposium on Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres CY MAR 16-17, 1995 CL DENVER, CO SP ASTM Comm G 4 Compatib & Sensitiv Mat Oxygen Enriched Atmospheres DE oxygen; breathing-air devices; SCBA; flammability; safety; compatibility; mechanical impact; promoted combustion; AIT; Viton; Teflon; stainless steel C1 NASA,WHITE SANDS TEST FACIL,ALLIEDSIGNAL TECH SERV CORP TEAM,LAS CRUCES,NM 88004. NR 0 TC 1 Z9 1 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 0-8031-2004-4 J9 AM SOC TEST MATER PY 1995 VL 1267 BP 184 EP 191 DI 10.1520/STP16436S PG 8 WC Chemistry, Inorganic & Nuclear; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA BE80R UT WOS:A1995BE80R00016 ER PT S AU Janoff, DD Royals, WT Gunaji, MV AF Janoff, DD Royals, WT Gunaji, MV BE Janoff, DD Royals, WT Gunaji, MV TI Flammability and sensitivity of materials in oxygen-enriched atmospheres: Seventh volume - Overview SO FLAMMABILITY AND SENSITIVITY OF MATERIALS IN OXYGEN-ENRICHED ATMOSPHERES: SEVENTH VOLUME SE AMERICAN SOCIETY FOR TESTING AND MATERIALS SPECIAL TECHNICAL PUBLICATION LA English DT Proceedings Paper CT Symposium on Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres CY MAR 16-17, 1995 CL DENVER, CO SP ASTM Comm G 4 Compatib & Sensitiv Mat Oxygen Enriched Atmospheres C1 NASA,LYNDON B JOHNSON SPACE CTR,LOCKHEED ENGN & SCI CO,HOUSTON,TX 77058. NR 0 TC 0 Z9 0 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 0-8031-2004-4 J9 AM SOC TEST MATER PY 1995 VL 1267 BP R7 EP R9 PG 3 WC Chemistry, Inorganic & Nuclear; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA BE80R UT WOS:A1995BE80R00001 ER PT S AU Fishman, GJ Barthelmy, S AF Fishman, GJ Barthelmy, S BE Greiner, J Duerbeck, HW Gershberg, RE TI Gamma-ray bursts: Observational overview, searches for counterparts, and BACODINE SO FLARES AND FLASHES SE LECTURE NOTES IN PHYSICS LA English DT Proceedings Paper CT 151st IAU Colloquium on Flares and Flashes CY DEC 05-09, 1994 CL SONNEBERG, GERMANY SP IAU C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,SPACE SCI LAB,HUNTSVILLE,AL 35812. RI Barthelmy, Scott/D-2943-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY SN 0075-8450 BN 3-540-60057-4 J9 LECT NOTES PHYS PY 1995 VL 454 BP 341 EP 352 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE96G UT WOS:A1995BE96G00088 ER PT B AU Lamar, JE AF Lamar, JE BE Crowder, JP TI Vapor-screen determined quantifiable vortex features of F-106B aircraft at subsonic speeds SO FLOW VISUALIZATION VII LA English DT Proceedings Paper CT 7th International Symposium on Flow Visualization CY SEP 11-14, 1995 CL SEATTLE, WA SP Royal Netherlands Acad Arts & Sci, Int Flow Visualizat Soc, Univ Washington, Amer Inst Aeronaut & Astronaut, Boeing Co ID LAYER C1 NASA, Langley Res Ctr, Vehicle Performance Branch, Hampton, VA 23681 USA. RP Lamar, JE (reprint author), NASA, Langley Res Ctr, Vehicle Performance Branch, Hampton, VA 23681 USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU BEGELL HOUSE, INC PI NEW YORK PA 145 MADISON AVE, NEW YORK, NY 10016 USA BN 1-56700-036-3 PY 1995 BP 270 EP 277 PG 6 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BM50Q UT WOS:000078910900040 ER PT B AU Kennelly, RA Westphal, RV Mateer, GG Seelen, J AF Kennelly, RA Westphal, RV Mateer, GG Seelen, J BE Crowder, JP TI Surface oil film interferometry on a swept wing model in supersonic flow SO FLOW VISUALIZATION VII LA English DT Proceedings Paper CT 7th International Symposium on Flow Visualization CY SEP 11-14, 1995 CL SEATTLE, WA SP Royal Netherlands Acad Arts & Sci, Int Flow Visualizat Soc, Univ Washington, Amer Inst Aeronaut & Astronaut, Boeing Co C1 NASA, Ames Res Ctr, Moffett Field, CA 94035 USA. RP Kennelly, RA (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU BEGELL HOUSE, INC PI NEW YORK PA 145 MADISON AVE, NEW YORK, NY 10016 USA BN 1-56700-036-3 PY 1995 BP 302 EP 307 PG 6 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BM50Q UT WOS:000078910900045 ER PT B AU Naughton, JW Horstman, CC Garrison, TJ AF Naughton, JW Horstman, CC Garrison, TJ BE Crowder, JP TI Virtual planar laser scattering visualization using numerically-computed flow fields SO FLOW VISUALIZATION VII LA English DT Proceedings Paper CT 7th International Symposium on Flow Visualization CY SEP 11-14, 1995 CL SEATTLE, WA SP Royal Netherlands Acad Arts & Sci, Int Flow Visualizat Soc, Univ Washington, Amer Inst Aeronaut & Astronaut, Boeing Co ID TURBULENT-BOUNDARY-LAYER C1 NASA, Ames Res Ctr, Turbulence Modeling & Phys Branch, Moffett Field, CA 94035 USA. RP NASA, Ames Res Ctr, Turbulence Modeling & Phys Branch, Moffett Field, CA 94035 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU BEGELL HOUSE, INC PI NEW YORK PA 145 MADISON AVE, NEW YORK, NY 10016 USA BN 1-56700-036-3 PY 1995 BP 566 EP 571 PG 2 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BM50Q UT WOS:000078910900085 ER PT B AU Ma, KL Smith, PJ Jain, S AF Ma, KL Smith, PJ Jain, S BE Crowder, JP TI Cloud dispersion properties in visualization of gas and particle mixing SO FLOW VISUALIZATION VII LA English DT Proceedings Paper CT 7th International Symposium on Flow Visualization CY SEP 11-14, 1995 CL SEATTLE, WA SP Royal Netherlands Acad Arts & Sci, Int Flow Visualizat Soc, Univ Washington, Amer Inst Aeronaut & Astronaut, Boeing Co C1 NASA, Langley Res Ctr, Inst Comp Applicat Sci & Engn, Hampton, VA 23681 USA. RP Ma, KL (reprint author), NASA, Langley Res Ctr, Inst Comp Applicat Sci & Engn, Hampton, VA 23681 USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU BEGELL HOUSE, INC PI NEW YORK PA 145 MADISON AVE, NEW YORK, NY 10016 USA BN 1-56700-036-3 PY 1995 BP 572 EP 577 PG 6 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BM50Q UT WOS:000078910900086 ER PT B AU Ma, KL Zheng, ZC AF Ma, KL Zheng, ZC BE Crowder, JP TI Volume visualization of airplane wake vortices SO FLOW VISUALIZATION VII LA English DT Proceedings Paper CT 7th International Symposium on Flow Visualization CY SEP 11-14, 1995 CL SEATTLE, WA SP Royal Netherlands Acad Arts & Sci, Int Flow Visualizat Soc, Univ Washington, Amer Inst Aeronaut & Astronaut, Boeing Co C1 NASA, Langley Res Ctr, Inst Comp Applicat Sci & Engn, Hampton, VA 23681 USA. RP Ma, KL (reprint author), NASA, Langley Res Ctr, Inst Comp Applicat Sci & Engn, Hampton, VA 23681 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU BEGELL HOUSE, INC PI NEW YORK PA 145 MADISON AVE, NEW YORK, NY 10016 USA BN 1-56700-036-3 PY 1995 BP 586 EP 591 PG 6 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BM50Q UT WOS:000078910900088 ER PT B AU Naughton, JW Venkatapathy, E Fletcher, DG AF Naughton, JW Venkatapathy, E Fletcher, DG BE Crowder, JP TI Combined computational/experimental flow-field imaging for efficient testing SO FLOW VISUALIZATION VII LA English DT Proceedings Paper CT 7th International Symposium on Flow Visualization CY SEP 11-14, 1995 CL SEATTLE, WA SP Royal Netherlands Acad Arts & Sci, Int Flow Visualizat Soc, Univ Washington, Amer Inst Aeronaut & Astronaut, Boeing Co C1 NASA, Ames Res Ctr, Moffett Field, CA 94035 USA. RP Naughton, JW (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU BEGELL HOUSE, INC PI NEW YORK PA 145 MADISON AVE, NEW YORK, NY 10016 USA BN 1-56700-036-3 PY 1995 BP 832 EP 837 PG 2 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BM50Q UT WOS:000078910900127 ER PT B AU Lanser, WR Botha, GJ Crowder, JP AF Lanser, WR Botha, GJ Crowder, JP BE Crowder, JP TI Flow visualization applied to a full-scale F/A-18 aircraft in a wind tunnel test SO FLOW VISUALIZATION VII LA English DT Proceedings Paper CT 7th International Symposium on Flow Visualization CY SEP 11-14, 1995 CL SEATTLE, WA SP Royal Netherlands Acad Arts & Sci, Int Flow Visualizat Soc, Univ Washington, Amer Inst Aeronaut & Astronaut, Boeing Co C1 NASA, Ames Res Ctr, Moffett Field, CA 94035 USA. RP Lanser, WR (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU BEGELL HOUSE, INC PI NEW YORK PA 145 MADISON AVE, NEW YORK, NY 10016 USA BN 1-56700-036-3 PY 1995 BP 922 EP 928 PG 5 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BM50Q UT WOS:000078910900141 ER PT B AU Cattafesta, LN Moore, JG AF Cattafesta, LN Moore, JG BE Crowder, JP TI Transition detection in high-speed flows with luminescent temperature-sensitive paints SO FLOW VISUALIZATION VII LA English DT Proceedings Paper CT 7th International Symposium on Flow Visualization CY SEP 11-14, 1995 CL SEATTLE, WA SP Royal Netherlands Acad Arts & Sci, Int Flow Visualizat Soc, Univ Washington, Amer Inst Aeronaut & Astronaut, Boeing Co C1 NASA, Langley Res Ctr, High Technol Corp, Hampton, VA 23681 USA. RP Cattafesta, LN (reprint author), NASA, Langley Res Ctr, High Technol Corp, M-S 170, Hampton, VA 23681 USA. RI Cattafesta, Louis/A-9545-2015 OI Cattafesta, Louis/0000-0002-5767-3383 NR 16 TC 0 Z9 0 U1 0 U2 0 PU BEGELL HOUSE, INC PI NEW YORK PA 145 MADISON AVE, NEW YORK, NY 10016 USA BN 1-56700-036-3 PY 1995 BP 944 EP 949 PG 6 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BM50Q UT WOS:000078910900144 ER PT B AU Root, JF AF Root, JF GP AMER SOC AGR ENGINEERS TI NASA technology transfer: From the lab to the marketplace SO FOOD PROCESSING AUTOMATION IV LA English DT Meeting Abstract CT 4th Food Processing Automation Conference (FPAC IV) CY NOV 03-05, 1995 CL CHICAGO, IL SP Amer Soc Agr Engineers, Food & Proc Engn Inst DE technology; transfer RP Root, JF (reprint author), NASA HEADQUARTERS,OFF SPACE ACCESS & TECHNOL,WASHINGTON,DC 20546, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC AGRICULTURAL ENGINEERS PI ST JOSEPH PA 2950 NILES RD, ST JOSEPH, MI 49085-9659 BN 0-929355-70-9 PY 1995 BP 569 EP 569 PG 1 WC Engineering, Chemical; Food Science & Technology SC Engineering; Food Science & Technology GA BF62N UT WOS:A1995BF62N00066 ER PT S AU Keyes, DE AF Keyes, DE BE Deshpande, SM Desai, SS Narasimha, R TI Aerodynamic applications of Newton-Krylov-Schwarz solvers SO FOURTEENTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN FLUID DYNAMICS SE LECTURE NOTES IN PHYSICS LA English DT Proceedings Paper CT 14th International Conference on Numerical Methods in Fluid Dynamics CY JUL 11-15, 1994 CL BANGALORE, INDIA SP Council Sci & Ind Res, New Delhi, Natl Aerosp Lab, Bangalore, Jawaharlal Nehru Ctr Adv Sci Res, Bangalore, Indian Inst Sci, Bangalore, Indian Inst Technol, New Delhi, Aeronaut Dev Agcy, Bangalore, Tata Informat Syst Ltd, Bangalore, Aeronaut Res & Dev Board, New Delhi, Dept Sci & Technol, New Delhi, Ctr Dev Adv Comp, Pune C1 NASA,LANGLEY RES CTR,INST COMP APPLICAT SCI & ENGN,HAMPTON,VA 23681. NR 0 TC 9 Z9 9 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY SN 0075-8450 BN 3-540-59280-6 J9 LECT NOTES PHYS PY 1995 VL 453 BP 1 EP 20 PG 20 WC Mathematics, Applied; Physics, Fluids & Plasmas; Physics, Mathematical SC Mathematics; Physics GA BE87R UT WOS:A1995BE87R00001 ER PT S AU Biswas, R Strawn, RC AF Biswas, R Strawn, RC BE Deshpande, SM Desai, SS Narasimha, R TI Dynamic mesh adaption for tetrahedral grids SO FOURTEENTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN FLUID DYNAMICS SE LECTURE NOTES IN PHYSICS LA English DT Proceedings Paper CT 14th International Conference on Numerical Methods in Fluid Dynamics CY JUL 11-15, 1994 CL BANGALORE, INDIA SP Council Sci & Ind Res, New Delhi, Natl Aerosp Lab, Bangalore, Jawaharlal Nehru Ctr Adv Sci Res, Bangalore, Indian Inst Sci, Bangalore, Indian Inst Technol, New Delhi, Aeronaut Dev Agcy, Bangalore, Tata Informat Syst Ltd, Bangalore, Aeronaut Res & Dev Board, New Delhi, Dept Sci & Technol, New Delhi, Ctr Dev Adv Comp, Pune C1 NASA,AMES RES CTR,RIACS,MOFFETT FIELD,CA 94035. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY SN 0075-8450 BN 3-540-59280-6 J9 LECT NOTES PHYS PY 1995 VL 453 BP 127 EP 132 PG 6 WC Mathematics, Applied; Physics, Fluids & Plasmas; Physics, Mathematical SC Mathematics; Physics GA BE87R UT WOS:A1995BE87R00015 ER PT S AU Taasan, S AF Taasan, S BE Deshpande, SM Desai, SS Narasimha, R TI Canonical-variables multigrid method for Euler equations SO FOURTEENTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN FLUID DYNAMICS SE LECTURE NOTES IN PHYSICS LA English DT Proceedings Paper CT 14th International Conference on Numerical Methods in Fluid Dynamics CY JUL 11-15, 1994 CL BANGALORE, INDIA SP Council Sci & Ind Res, New Delhi, Natl Aerosp Lab, Bangalore, Jawaharlal Nehru Ctr Adv Sci Res, Bangalore, Indian Inst Sci, Bangalore, Indian Inst Technol, New Delhi, Aeronaut Dev Agcy, Bangalore, Tata Informat Syst Ltd, Bangalore, Aeronaut Res & Dev Board, New Delhi, Dept Sci & Technol, New Delhi, Ctr Dev Adv Comp, Pune C1 NASA,LANGLEY RES CTR,INST COMP APPLICAT SCI & ENGN,HAMPTON,VA 23665. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY SN 0075-8450 BN 3-540-59280-6 J9 LECT NOTES PHYS PY 1995 VL 453 BP 173 EP 177 PG 5 WC Mathematics, Applied; Physics, Fluids & Plasmas; Physics, Mathematical SC Mathematics; Physics GA BE87R UT WOS:A1995BE87R00023 ER PT S AU Venkatakrishnan, V Mavriplis, DJ AF Venkatakrishnan, V Mavriplis, DJ BE Deshpande, SM Desai, SS Narasimha, R TI Agglomeration multigrid for the Euler equations SO FOURTEENTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN FLUID DYNAMICS SE LECTURE NOTES IN PHYSICS LA English DT Proceedings Paper CT 14th International Conference on Numerical Methods in Fluid Dynamics CY JUL 11-15, 1994 CL BANGALORE, INDIA SP Council Sci & Ind Res, New Delhi, Natl Aerosp Lab, Bangalore, Jawaharlal Nehru Ctr Adv Sci Res, Bangalore, Indian Inst Sci, Bangalore, Indian Inst Technol, New Delhi, Aeronaut Dev Agcy, Bangalore, Tata Informat Syst Ltd, Bangalore, Aeronaut Res & Dev Board, New Delhi, Dept Sci & Technol, New Delhi, Ctr Dev Adv Comp, Pune C1 NASA,LANGLEY RES CTR,INST COMP APPLICAT SCI & ENGN,HAMPTON,VA 23665. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY SN 0075-8450 BN 3-540-59280-6 J9 LECT NOTES PHYS PY 1995 VL 453 BP 178 EP 182 PG 5 WC Mathematics, Applied; Physics, Fluids & Plasmas; Physics, Mathematical SC Mathematics; Physics GA BE87R UT WOS:A1995BE87R00024 ER PT S AU Klopfer, GH Obayashi, S AF Klopfer, GH Obayashi, S BE Deshpande, SM Desai, SS Narasimha, R TI Virtual zone Navier-Stokes computations for oscillating control surfaces SO FOURTEENTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN FLUID DYNAMICS SE LECTURE NOTES IN PHYSICS LA English DT Proceedings Paper CT 14th International Conference on Numerical Methods in Fluid Dynamics CY JUL 11-15, 1994 CL BANGALORE, INDIA SP Council Sci & Ind Res, New Delhi, Natl Aerosp Lab, Bangalore, Jawaharlal Nehru Ctr Adv Sci Res, Bangalore, Indian Inst Sci, Bangalore, Indian Inst Technol, New Delhi, Aeronaut Dev Agcy, Bangalore, Tata Informat Syst Ltd, Bangalore, Aeronaut Res & Dev Board, New Delhi, Dept Sci & Technol, New Delhi, Ctr Dev Adv Comp, Pune C1 NASA,AMES RES CTR,MCAT INST,MOFFETT FIELD,CA 94035. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY SN 0075-8450 BN 3-540-59280-6 J9 LECT NOTES PHYS PY 1995 VL 453 BP 285 EP 286 PG 2 WC Mathematics, Applied; Physics, Fluids & Plasmas; Physics, Mathematical SC Mathematics; Physics GA BE87R UT WOS:A1995BE87R00042 ER PT S AU Srinivasan, GR AF Srinivasan, GR BE Deshpande, SM Desai, SS Narasimha, R TI Advances in Euler and Navier-Stokes methods for helicopter applications SO FOURTEENTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN FLUID DYNAMICS SE LECTURE NOTES IN PHYSICS LA English DT Proceedings Paper CT 14th International Conference on Numerical Methods in Fluid Dynamics CY JUL 11-15, 1994 CL BANGALORE, INDIA SP Council Sci & Ind Res, New Delhi, Natl Aerosp Lab, Bangalore, Jawaharlal Nehru Ctr Adv Sci Res, Bangalore, Indian Inst Sci, Bangalore, Indian Inst Technol, New Delhi, Aeronaut Dev Agcy, Bangalore, Tata Informat Syst Ltd, Bangalore, Aeronaut Res & Dev Board, New Delhi, Dept Sci & Technol, New Delhi, Ctr Dev Adv Comp, Pune C1 NASA,AMES RES CTR,JAI ASSOCIATES INC,MOFFETT FIELD,CA 94035. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY SN 0075-8450 BN 3-540-59280-6 J9 LECT NOTES PHYS PY 1995 VL 453 BP 556 EP 561 PG 6 WC Mathematics, Applied; Physics, Fluids & Plasmas; Physics, Mathematical SC Mathematics; Physics GA BE87R UT WOS:A1995BE87R00090 ER PT S AU TokarcikPolsky, S Cambier, JL AF TokarcikPolsky, S Cambier, JL BE Deshpande, SM Desai, SS Narasimha, R TI A numerical study of unsteady flow phenomena in the driven and nozzle sections of shock tunnels SO FOURTEENTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN FLUID DYNAMICS SE LECTURE NOTES IN PHYSICS LA English DT Proceedings Paper CT 14th International Conference on Numerical Methods in Fluid Dynamics CY JUL 11-15, 1994 CL BANGALORE, INDIA SP Council Sci & Ind Res, New Delhi, Natl Aerosp Lab, Bangalore, Jawaharlal Nehru Ctr Adv Sci Res, Bangalore, Indian Inst Sci, Bangalore, Indian Inst Technol, New Delhi, Aeronaut Dev Agcy, Bangalore, Tata Informat Syst Ltd, Bangalore, Aeronaut Res & Dev Board, New Delhi, Dept Sci & Technol, New Delhi, Ctr Dev Adv Comp, Pune C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY SN 0075-8450 BN 3-540-59280-6 J9 LECT NOTES PHYS PY 1995 VL 453 BP 568 EP 573 PG 6 WC Mathematics, Applied; Physics, Fluids & Plasmas; Physics, Mathematical SC Mathematics; Physics GA BE87R UT WOS:A1995BE87R00092 ER PT J AU ROSSOW, WB AF ROSSOW, WB GP AMER METEOROL SOC TI Another look at the seasonal variation of polar cloudiness with satellite and surface observations SO FOURTH CONFERENCE ON POLAR METEOROLOGY AND OCEANOGRAPHY LA English DT Proceedings Paper CT 4th Conference on Polar Meteorology and Oceanography, at the 75th AMS Annual Meeting CY JAN 15-20, 1995 CL DALLAS, TX SP Amer Meteorol Soc, World Meteorol Soc C1 NASA,GODDARD INST SPACE STUDIES,NEW YORK,NY 10025. 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 311 EP 314 PG 4 WC Meteorology & Atmospheric Sciences; Oceanography SC Meteorology & Atmospheric Sciences; Oceanography GA BD28S UT WOS:A1995BD28S00066 ER PT B AU LESH, JR DEPAULA, R AF LESH, JR DEPAULA, R BE Mecherle, GS TI OVERVIEW OF NASA R&D IN OPTICAL COMMUNICATIONS SO FREE-SPACE LASER COMMUNICATION TECHNOLOGIES VII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Free-Space Laser Communication Technologies VII (FSLCT VII) CY FEB 07-08, 1995 CL SAN JOSE, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE OPTICAL COMMUNICATIONS; LASER COMMUNICATIONS; HIGH DATA RATES; ATMOSPHERIC PROPAGATION; SPACE-TO-GROUND LINKS; AIR-TO-GROUND LINKS C1 JET PROP LAB,PASADENA,CA 91109. 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 0-8194-1728-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2381 BP 4 EP 11 DI 10.1117/12.207406 PG 8 WC Engineering, Aerospace; Instruments & Instrumentation; Optics; Telecommunications SC Engineering; Instruments & Instrumentation; Optics; Telecommunications GA BC98W UT WOS:A1995BC98W00002 ER PT B AU SHAIK, K WILHELM, M WONICA, D AF SHAIK, K WILHELM, M WONICA, D BE Mecherle, GS TI OPTICAL SUBNET CONCEPT FOR THE NASA DEEP SPACE NETWORK SO FREE-SPACE LASER COMMUNICATION TECHNOLOGIES VII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Free-Space Laser Communication Technologies VII (FSLCT VII) CY FEB 07-08, 1995 CL SAN JOSE, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 JET PROP LAB,PASADENA,CA 91109. 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 0-8194-1728-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2381 BP 183 EP 192 DI 10.1117/12.207418 PG 10 WC Engineering, Aerospace; Instruments & Instrumentation; Optics; Telecommunications SC Engineering; Instruments & Instrumentation; Optics; Telecommunications GA BC98W UT WOS:A1995BC98W00018 ER PT S AU SCHATTEN, KH AF SCHATTEN, KH BE Greenberger, DM Zeilinger, A TI HIDDEN-VARIABLES MODEL AND NONLOCALITY IN THE BOHM/EPR EXPERIMENT SO FUNDAMENTAL PROBLEMS IN QUANTUM THEORY: A CONFERENCE HELD IN HONOR OF PROFESSOR JOHN A. WHEELER SE ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Article; Proceedings Paper CT Conference on Fundamental Problems in Quantum Theory, A Conference held in Honor of Professor John A. Wheeler CY JUN 18-22, 1994 CL BALTIMORE, MD SP New York Acad Sci RP SCHATTEN, KH (reprint author), NASA,GODDARD SPACE FLIGHT CTR,SENSORS DEV & CHARACTERIZAT BRANCH,GREENBELT,MD 20771, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA 2 EAST 63RD ST, NEW YORK, NY 10021 SN 0077-8923 BN 0-89766-921-5 J9 ANN NY ACAD SCI JI Ann.NY Acad.Sci. PY 1995 VL 755 BP 892 EP 895 DI 10.1111/j.1749-6632.1995.tb39041.x PG 4 WC Instruments & Instrumentation; Multidisciplinary Sciences; Optics; Physics, Applied; Physics, Mathematical SC Instruments & Instrumentation; Science & Technology - Other Topics; Optics; Physics GA BD11V UT WOS:A1995BD11V00090 ER PT J AU NOEVER, DA AF NOEVER, DA TI POLARIZED NUCLEI IN A SIMPLE MIRROR FUSION-REACTOR SO FUSION TECHNOLOGY LA English DT Article DE POLARIZED NUCLEI; MIRROR REACTOR; ALPHA-PARTICLES ID DEUTERIUM; TOKAMAKS; PLASMAS AB The possibility of enhancing the ratio of output to input power Q in a simple mirror machine by polarizing deuterium-tritium (D-T) nuclei is evaluated. Taking the Livermore mirror reference design mirror ratio of 6.54, the expected sin2 sic angular distribution of fusion decay products reduces immediate losses of alpha particles to the loss cone by 7.6% and alpha-ion scattering losses by approximately 50%. Based on these findings, alpha-particle confinement times for a polarized plasma should therefore be 1.11 times greater than for isotropic nuclei. Coupling this enhanced alpha-particle heating with the expected > 50% D-T reaction cross section, a corresponding power ratio for polarized nuclei, Q(polarized), is found to be 1.63 times greater than the classical unpolarized value Q(classical). The effects of this increase in Q are assessed for the simple mirror. RP NOEVER, DA (reprint author), NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,ES76,HUNTSVILLE,AL 35812, USA. NR 20 TC 0 Z9 0 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 JAN PY 1995 VL 27 IS 1 BP 86 EP 102 PG 17 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PY683 UT WOS:A1995PY68300007 ER PT S AU FICHTEL, CE AF FICHTEL, CE BE Gehrels, N TI RESULTS FROM THE ENERGETIC GAMMA-RAY EXPERIMENT TELESCOPE ON THE COMPTON-GAMMA-RAY-OBSERVATORY SO GAMMA RAY ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT E2 Symposium of COSPAR Scientific Commission E on Gamma Ray Astronomy, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP INT ASTRON UNION ID SMALL MAGELLANIC CLOUD; COSMIC-RAYS; EMISSION; GEMINGA; EGRET; PERIOD; BURST AB The Energetic Gamma Ray Experiment Telescope (EGRET) on the Compton Gamma Ray Observatory has the capability of exploring the high energy gamma ray range from approximately 30 MeV to 30 GeV with a sensitivity considerably greater than earlier gamma-ray satellite telescopes. The dominant radiation from the high energy gamma ray sky is the diffuse radiation along the galactic plane. It has been mapped in terms of distribution and energy spectrum, and both are found to be in reasonable agreement with that expected from galactic cosmic ray interactions. Thus far, five pulsars have been detected and their properties measured. The high energy gamma rays appear to be an increasing fraction of the total emitted electromagnetic radiation as the age of the pulsar increases up to one million years. Observations of one solar flare event showed that there was strong evidence for long-term trapping of relativistic solar nuclei in the solar vicinity for at least 10 hours. Regarding the gamma ray bursts of unknown origin, high energy gamma rays have been seen following a burst for over an hour, with energies in the GeV range and even higher in the case of two individual gamma rays. The observation of the Small Magellanic Cloud appears to answer finally the long open question of whether the bulk of the cosmic rays are galactic or pervade some much larger volume on the side of their being galactic. Over 30 Active Galactic Nuclei (AGN's) have been seen in high energy gamma rays with high probability thus far including quasars and BL Lac objects, but no Seyfert galaxies. Time variations have been detected in many of these AGN's. RP FICHTEL, CE (reprint author), NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771, USA. NR 45 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 0-08-042555-0 J9 ADV SPACE RES PY 1995 VL 15 IS 5 BP 13 EP 21 DI 10.1016/0273-1177(94)00028-Y PG 9 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC72D UT WOS:A1995BC72D00002 ER PT S AU GRANDI, P MARASCHI, L URRY, CM WEHRLE, AE ALLER, MF ALLER, HD BALONEK, TJ JASON, J MCHARDY, IM HARTMAN, RC PIAN, E STEVENS, JA SADUN, AC TERASRANTA, H TREVES, A AF GRANDI, P MARASCHI, L URRY, CM WEHRLE, AE ALLER, MF ALLER, HD BALONEK, TJ JASON, J MCHARDY, IM HARTMAN, RC PIAN, E STEVENS, JA SADUN, AC TERASRANTA, H TREVES, A BE Gehrels, N TI LONG-TERM VARIABILITY OF 3C279 SO GAMMA RAY ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT E2 Symposium of COSPAR Scientific Commission E on Gamma Ray Astronomy, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP INT ASTRON UNION ID BLAZARS; CONTINUUM; OBJECTS; RADIO AB Radio, mm, optical, UV and X-ray Light curves of 3C 279 as well as the gamma-ray Light curve available since 1991 June are considered. Strong flux correlations are found between the X-ray and the radio-optical region. Variations at 100 MeV are well correlated to the optical and X-ray bands. The variability amplitude, as measured by an average logarithmic dispersion of the available measurements is small in the radio and increases systematically with increasing frequency up to the gamma-ray band, with the possible exception of the X-ray amplitude. C1 UNIV MILAN,DEPT PHYS,I-20133 MILAN,ITALY. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. CALTECH,PASADENA,CA 91125. UNIV MICHIGAN,ANN ARBOR,MI 48109. COLGATE UNIV,DEPT PHYS & ASTRON,HAMILTON,NY 13346. UNIV SOUTHAMPTON,DEPT PHYS,SOUTHAMPTON SO9 5NH,HANTS,ENGLAND. NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. SCUOLA INT SUPER STUDI AVANZATI,I-34014 TRIESTE,ITALY. LANCASHIRE POLYTECH,CTR ASTRON,PRESTON PR1 2TQ,LANCS,ENGLAND. AGNES SCOTT COLL,DEPT PHYS & ASTRON,BRADLEY OBSERV,DECATUR,GA. METSAHOVI RADIO RES STN,KYLMALA,FINLAND. RP GRANDI, P (reprint author), IST ASTROFIS SPAZIALE,CP 67,VIA E FERMI 21,I-00044 FRASCATI,ITALY. RI Gehrels, Neil/D-2971-2012; Urry, Claudia/G-7381-2011; OI Urry, Claudia/0000-0002-0745-9792; Pian, Elena/0000-0001-8646-4858 NR 17 TC 2 Z9 2 U1 0 U2 2 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042555-0 J9 ADV SPACE RES PY 1995 VL 15 IS 5 BP 23 EP 26 DI 10.1016/0273-1177(94)00029-Z PG 4 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC72D UT WOS:A1995BC72D00003 ER PT S AU BARING, MG AF BARING, MG BE Gehrels, N TI RESONANT COMPTON-SCATTERING AND GAMMA-RAY BURST CONTINUUM SPECTRA SO GAMMA RAY ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT E2 Symposium of COSPAR Scientific Commission E on Gamma Ray Astronomy, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP INT ASTRON UNION ID STRONG MAGNETIC-FIELDS AB The Thomson limit of resonant inverse Compton scattering in the strong magnetic fields of neutron stars is considered as a mechanism for producing gamma-ray burst continuum spectra. Photon production spectra and electron cooling rates are presented using the full magnetic Thomson cross-section. Model emission spectra are obtained as self-consistent solutions of a set of photon and electron kinetic equations, displaying spectral breaks and other structure at gamma-ray energies. RP BARING, MG (reprint author), NASA,GODDARD SPACE FLIGHT CTR,CODE 665,GREENBELT,MD 20771, USA. NR 10 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042555-0 J9 ADV SPACE RES PY 1995 VL 15 IS 5 BP 85 EP 88 DI 10.1016/0273-1177(94)00042-Y PG 4 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC72D UT WOS:A1995BC72D00016 ER PT S AU STAUBERT, R MAISACK, M KENDZIORRA, E DRAXLER, T FINGER, MH FISHMAN, GJ STRICKMAN, MS STARR, CH AF STAUBERT, R MAISACK, M KENDZIORRA, E DRAXLER, T FINGER, MH FISHMAN, GJ STRICKMAN, MS STARR, CH BE Gehrels, N TI OBSERVATIONS OF A LARGE FLARE IN GX-1+4 WITH THE COMPTON-GAMMA-RAY-OBSERVATORY SO GAMMA RAY ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT E2 Symposium of COSPAR Scientific Commission E on Gamma Ray Astronomy, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP INT ASTRON UNION AB The pulsating X-ray binary GX 1+4 (4U 1728-24) was observed by OSSE onboard the Compton Gamma Ray Observatory from 9 to 21 September 1993 as a target of opportunity after BATSE had detected the onset of a large flare by the greatly increased pulsed flux at the period of similar to 2 min. The total flux in the 40-100 keV range as observed by OSSE reached its maximum of 83 mCrab on 14/15 September, after which it fell sharply to about 31 mCrab within 2 days. The spectrum is well described by thermal type spectra. The characteristic temperature of the average OSSE spectrum for a thermal Bremsstrahlung model is kT = (35.5 +/- 0.5) keV. A single power law can be ruled out. There is evidence for a hardening of the spectrum with decreasing intensity at the end of the flare. The barycentric pulse period was (120.567 +/- 0.005) s on 5 September. The average spin-down rate as taken from the standard BATSE analysis was dP/dt = 0.0105 s/day, and constant over the time of the flare. A further TOO observation with the ROSAT PSPC on 18 September led to the first detection of the source with a reflecting X-ray telescope and to a significantly improved position: RA(2000) = 17h 32m 2.1s and DEC(2000) = -24 degrees 44' 44 ''. This position (3.5 '' from V2116 Oph, with a 90% error radius of 8 '') is the most accurate so far obtained with an X-ray instrument, thus confirming the identification with the suspected stellar counterpart. C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. USN,RES LAB,WASHINGTON,DC 20375. RP STAUBERT, R (reprint author), UNIV TUBINGEN,INST ASTRON,WALDHAUSERSTR 64,D-72076 TUBINGEN,GERMANY. RI Gehrels, Neil/D-2971-2012 NR 20 TC 6 Z9 6 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042555-0 J9 ADV SPACE RES PY 1995 VL 15 IS 5 BP 119 EP 122 DI 10.1016/0273-1177(94)00049-7 PG 4 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC72D UT WOS:A1995BC72D00023 ER PT S AU HURLEY, K KOUVELIOTOU, C FISHMAN, J MEEGAN, C LAROS, J KLEBESADEL, R AF HURLEY, K KOUVELIOTOU, C FISHMAN, J MEEGAN, C LAROS, J KLEBESADEL, R BE Gehrels, N TI THE APPLICATION OF NETWORK SYNTHESIS TO REPEATING CLASSICAL GAMMA-RAY BURSTS SO GAMMA RAY ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT E2 Symposium of COSPAR Scientific Commission E on Gamma Ray Astronomy, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP INT ASTRON UNION AB It has been suggested that the BATSE gamma-ray burst catalog contains several groups of bursts clustered in space or in space and time, which provide evidence that a substantial fraction of the classical gamma-ray burst sources repeat. Because many of the bursts in these groups are weak, they are not directly detected by the Ulysses GRB experiment. We apply the network synthesis method to these events to test the repeating burst hypothesis. Although we find no evidence for repeating sources, the method must be applied under more general conditions before reaching any definite conclusions about the existence of classical gamma-ray burst repeating sources. C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. UNIV ARIZONA,DEPT PLANETARY SCI,TUCSON,AZ 85721. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. RP HURLEY, K (reprint author), UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720, USA. NR 4 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042555-0 J9 ADV SPACE RES PY 1995 VL 15 IS 5 BP 127 EP 130 DI 10.1016/0273-1177(94)00051-2 PG 4 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC72D UT WOS:A1995BC72D00025 ER PT S AU MITROFANOV, IG CHERNENKO, AM POZANENKO, AS FISHMAN, GJ MEEGAN, CA BRIGGS, MS PACIESAS, WS SAGDEEV, RZ AF MITROFANOV, IG CHERNENKO, AM POZANENKO, AS FISHMAN, GJ MEEGAN, CA BRIGGS, MS PACIESAS, WS SAGDEEV, RZ BE Gehrels, N TI STATISTICAL STUDY OF EVOLUTION OF GAMMA-RAY BURSTS DETECTED BY APEX/PHOBOS AND BASTE/COMPTON INSTRUMENTS SO GAMMA RAY ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT E2 Symposium of COSPAR Scientific Commission E on Gamma Ray Astronomy, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP INT ASTRON UNION AB The new method of statistical studying of cosmic gamma-ray bursts is presented based on the averaging of time profiles. The comparison is done between bright and dim events: while no differences were found between average flux curves, the hardness ratios pointed out the effect of hardness/brightness correlation. C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. UNIV MARYLAND,COLLEGE PK,MD 20742. RP MITROFANOV, IG (reprint author), INST SPACE RES,MOSCOW 117810,RUSSIA. NR 8 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 0-08-042555-0 J9 ADV SPACE RES PY 1995 VL 15 IS 5 BP 131 EP 134 DI 10.1016/0273-1177(94)00052-3 PG 4 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC72D UT WOS:A1995BC72D00026 ER PT S AU NORRIS, JP NEMIROFF, RJ BONNELL, JT SCARGLE, JD DAVIS, SP KOUVELIOTOU, C PENDLETON, G FISHMAN, GJ MEEGAN, CA PACIESAS, WS WICKRAMASINGHE, WADT AF NORRIS, JP NEMIROFF, RJ BONNELL, JT SCARGLE, JD DAVIS, SP KOUVELIOTOU, C PENDLETON, G FISHMAN, GJ MEEGAN, CA PACIESAS, WS WICKRAMASINGHE, WADT BE Gehrels, N TI CONSISTENCY OF TIME DILATION NV TEMPORAL PROFILES AND SPECTRA OF GAMMA-RAY BURSTS SO GAMMA RAY ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT E2 Symposium of COSPAR Scientific Commission E on Gamma Ray Astronomy, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP INT ASTRON UNION AB If gamma-ray bursters are at cosmological distances - a possibility suggested by their isotropic distribution and spatial inhomogeneity - then the temporal profiles and spectra of more distant sources will be time dilated compared to those of relatively nearby sources. Analyses of bright and dim BATSE gamma-ray bursts yield a relative time-dilation factor of 2.3 on timescales of pulses and event durations. We redshift the spectra of time intervals near the intensity peaks of the bright sample on a trial grid and compare with spectra of the dim sample. A redshift factor of order two with wide latitude permitted - brings the spectra of the two brightness groups into alignment. Thus there is coarse agreement with the time-dilation factor found in the temporal domain. C1 GEORGE MASON UNIV,FAIRFAX,VA 22030. UNIV SPACE RES ASSOC,WASHINGTON,DC. NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. CATHOLIC UNIV AMER,WASHINGTON,DC 20064. NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. UNIV ALABAMA,HUNTSVILLE,AL 35899. UNIV PENN,PHILADELPHIA,PA 19104. RP NORRIS, JP (reprint author), NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771, USA. RI Gehrels, Neil/D-2971-2012; OI Nemiroff, Robert/0000-0002-4505-6599 NR 9 TC 2 Z9 2 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042555-0 J9 ADV SPACE RES PY 1995 VL 15 IS 5 BP 135 EP 138 DI 10.1016/0273-1177(94)00053-4 PG 4 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC72D UT WOS:A1995BC72D00027 ER PT S AU BARING, MG HARDING, AK AF BARING, MG HARDING, AK BE Gehrels, N TI PHOTON-PHOTON OPACITY CONSTRAINTS FOR RELATIVISTICALLY EXPANDING GAMMA-RAY BURST SOURCES SO GAMMA RAY ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT E2 Symposium of COSPAR Scientific Commission E on Gamma Ray Astronomy, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP INT ASTRON UNION ID FIREBALLS AB Five bright gamma-ray bursts detected by BATSE have also been detected at higher energies by EGRET. Four are consistent with power-law spectra extending to energies as high as, in the case of GRB930131, 1 GeV. The fifth, and most recent, GRB940217, has a more complex spectrum, with one photon detected at 18 GeV, the most energetic GRB photon detection to date. The optical depth to photon-photon pair production in these sources is extremely large for distances more than about 10pc away if the radiation is emitted isotropically in the observer's frame. This optical depth can be dramatically reduced if the source is moving with a relativistic bulk Lorentz factor Gamma, and recent calculations for this situation have been limited to cases of a beam with opening angle 1/Gamma, or expansions of infinitely thin spherical shells. This paper presents our extension of the pair production optical depth calculation in relativistically expanding sources to more general geometries, including shells of finite thickness and arbitrary opening angle. We find that the minimum bulk Lorentz factors for the EGRET sources to be optically thin, i.e. display no spectral attenuation, is only moderately dependent on the shell thickness and its opening solid angle; these new limits on required velocity for given source geometries will aid in placing realistic constraints on GRB source models. RP BARING, MG (reprint author), NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771, USA. RI Harding, Alice/D-3160-2012; Gehrels, Neil/D-2971-2012 NR 14 TC 11 Z9 11 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042555-0 J9 ADV SPACE RES PY 1995 VL 15 IS 5 BP 153 EP 156 DI 10.1016/0273-1177(94)00056-7 PG 4 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BC72D UT WOS:A1995BC72D00030 ER PT S AU GEHRELS, N SHRADER, C KNIFFEN, DA AF GEHRELS, N SHRADER, C KNIFFEN, DA BE Signore, M Salati, P Vedrenne, G TI The Compton Gamma Ray Observatory: Highlights from the first three years of the mission SO GAMMA RAY SKY WITH COMPTON GRO AND SIGMA SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on the Gamma Ray Sky with Compton GRO and SIGMA CY JAN 25-FEB 04, 1994 CL LES HOUCHES, FRANCE SP NATO, Sci Affairs Div C1 NASA,GODDARD SPACE FLIGHT CTR,HIGH ENERGY PHYS LAB,GREENBELT,MD 20771. NR 0 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3440-X J9 NATO ADV SCI INST SE PY 1995 VL 461 BP 1 EP 13 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD83J UT WOS:A1995BD83J00001 ER PT S AU HARTMAN, RC AF HARTMAN, RC BE Signore, M Salati, P Vedrenne, G TI EGRET observations of active galactic nuclei SO GAMMA RAY SKY WITH COMPTON GRO AND SIGMA SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on the Gamma Ray Sky with Compton GRO and SIGMA CY JAN 25-FEB 04, 1994 CL LES HOUCHES, FRANCE SP NATO, Sci Affairs Div C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3440-X J9 NATO ADV SCI INST SE PY 1995 VL 461 BP 89 EP 102 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD83J UT WOS:A1995BD83J00008 ER PT S AU TEEGARDEN, BJ AF TEEGARDEN, BJ BE Signore, M Salati, P Vedrenne, G TI Balloon observations of the Galactic Center 511 keV line and their relationship to satellite results SO GAMMA RAY SKY WITH COMPTON GRO AND SIGMA SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on the Gamma Ray Sky with Compton GRO and SIGMA CY JAN 25-FEB 04, 1994 CL LES HOUCHES, FRANCE SP NATO, Sci Affairs Div C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3440-X J9 NATO ADV SCI INST SE PY 1995 VL 461 BP 255 EP 266 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD83J UT WOS:A1995BD83J00021 ER PT S AU RAMATY, R AF RAMATY, R BE Signore, M Salati, P Vedrenne, G TI Astrophysical gamma ray lines from accelerated particle interactions SO GAMMA RAY SKY WITH COMPTON GRO AND SIGMA SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on the Gamma Ray Sky with Compton GRO and SIGMA CY JAN 25-FEB 04, 1994 CL LES HOUCHES, FRANCE SP NATO, Sci Affairs Div C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 5 Z9 5 U1 1 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3440-X J9 NATO ADV SCI INST SE PY 1995 VL 461 BP 279 EP 301 PG 23 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD83J UT WOS:A1995BD83J00023 ER PT S AU FISHMAN, GJ AF FISHMAN, GJ BE Signore, M Salati, P Vedrenne, G TI Observations of gamma-ray bursts SO GAMMA RAY SKY WITH COMPTON GRO AND SIGMA SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on the Gamma Ray Sky with Compton GRO and SIGMA CY JAN 25-FEB 04, 1994 CL LES HOUCHES, FRANCE SP NATO, Sci Affairs Div C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,SPACE SCI LAB,HUNTSVILLE,AL 35812. NR 0 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3440-X J9 NATO ADV SCI INST SE PY 1995 VL 461 BP 381 EP 394 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD83J UT WOS:A1995BD83J00028 ER PT J AU MCCOY, TJ KEIL, K BOGARD, DD GARRISON, DH CASANOVA, I LINDSTROM, MM BREARLEY, AJ KEHM, K NICHOLS, RH HOHENBERG, CM AF MCCOY, TJ KEIL, K BOGARD, DD GARRISON, DH CASANOVA, I LINDSTROM, MM BREARLEY, AJ KEHM, K NICHOLS, RH HOHENBERG, CM TI ORIGIN AND HISTORY OF IMPACT-MELT ROCKS OF ENSTATITE CHONDRITE PARENTAGE SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Article ID ACAPULCO METEORITE; AUBRITES; XENON AB We have conducted petrologic, chemical, and isotopic studies of two impact-produced rocks of enstatite chondrite parentage. Ilafegh 009 is a total impact-melt rock with no residual lithic clasts. Formation on the EL chondrite parent body is suggested by its mineralogy and mineral compositions. Cooling of the impact melt was rapid at melt temperatures and decreased at subsolidus temperatures. In contrast to previous studies, we show that Happy Canyon is not a new enstatite achondrite but an impact-melt breccia of enstatite chondrite (and not aubrite) parentage. This rock formed by impact melting and incorporation into the melt of clastic material (which resulted in relatively rapid cooling at all temperatures). Mineralogical and bulk compositional data (probably biased by the heterogeneous nature of this rock) do not allow unequivocal determination of its parent body (i.e., EL vs. EH), although some data such as bulk total Fe content seem to favor EL parentage. Both rocks were subjected to post-solidification shock, which was more severe for Ilafegh 009 than for Happy Canyon. It appears that both impact melt rocks could have formed by impact melting approximately 4.57 Ga ago, as is indicated by the nearly identical I-Xe closure ages of 1.6 and 1.4 Ma before Bjurbole for Ilafegh 009 and Happy Canyon, respectively. An apparently younger Ar-39-Ar-40 age of 4.53 Ga for Happy Canyon may be due to small biases in the intercalibration of the I-Xe and Ar-39-Ar-40 chronometers, whereas the much younger 4.34-4.44 Ga age for Ilafegh 009 reflects thermal resetting during shock metamorphism. Shallowater, which was impact-derived from a different enstatite achondrite parent body, has an I-Xe closure age 0.4 Ma younger than that for Ilafegh 009 and an Ar-39-Ar-40 age of 4.53 Ga. The ancient ages of these three rocks attest to the intense, early bombardment in this region of the solar system. C1 NASA,LYNDON B JOHNSON SPACE CTR,LOCKHEED ESC,HOUSTON,TX 77058. FIELD MUSEUM NAT HIST,DEPT GEOL,CHICAGO,IL 60605. UNIV NEW MEXICO,INST METEORIT,DEPT EARTH & PLANETARY SCI,ALBUQUERQUE,NM 87131. WASHINGTON UNIV,MCDONNELL CTR SPACE SCI,DEPT PHYS,ST LOUIS,MO 63130. UNIV CHICAGO,DEPT GEOPHYS SCI,CHICAGO,IL 60605. UNIV HAWAII MANOA,HAWAII CTR VOLCANOL,HONOLULU,HI 96822. RP MCCOY, TJ (reprint author), UNIV HAWAII MANOA,SCH OCEAN & EARTH SCI & TECHNOL,HAWAII INST GEOPHYS & PLANETOL,HONOLULU,HI 96822, USA. NR 46 TC 60 Z9 61 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD JAN PY 1995 VL 59 IS 1 BP 161 EP 175 DI 10.1016/00167-0379(40)0231A- PG 15 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA QC242 UT WOS:A1995QC24200012 ER PT J AU JUREWICZ, AJG MITTLEFEHLDT, DW JONES, JH AF JUREWICZ, AJG MITTLEFEHLDT, DW JONES, JH TI EXPERIMENTAL PARTIAL MELTING OF THE ST SEVERIN (LL) AND LOST CITY (H) CHONDRITES SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Article ID OXYGEN ISOTOPES; METEORITES; ORIGIN; DIOGENITES; PYROXENE; EUCRITES; OLIVINE AB We have performed melting experiments between 1170-1325-degrees-C and at an oxygen fugacity of IW - 1 on the ordinary chrondrites Lost City (H) and St. Severin (LL) in order to investigate the origin of diogenites and their possible relationship to eucrites. Low-Ca pyroxene disappears from the Lost City residuum just above 1220-degrees-C at a Mg# near 66. Accordingly, Lost City does not have a sufficiently large stability field for orthopyroxene to be a likely parent composition for melts which could crystallize diogenites. In contrast, orthopyroxene in St. Severin persists up to about 1325-degrees-C, at which point it has a Mg# similar to that of typical diogenites (approximately 75). This is only marginally compatible with diogenite origins, as the most magnesian pyroxenes from diogenites (Mg# 82) and howardites (Mg# 85) are more MgO-rich than any pyroxene formed from a St. Severin melt. Accordingly, if diogenites formed from a source having the bulk composition of an ordinary chondrite, than either the f(o)2 had to be lower than that inferred for eucrite formation or, more likely, the parent body had a lower Fe/Si ratio than that of an LL chondrite. Also, low temperature melts of St. Severin are depleted in elements compatible with pyroxene and so, while broadly eucritie, do not closely match the compositions of eucrites that are thought to be primary partial melts. Hence, it doesn't appear possible to produce both diogenites and eucrites from the same source region composition, if eucrites are primary partial melts. Reconnaissance experiments at higher oxygen fugacity (IW + 2) produce broadly angritic melts for Lost City, as was observed for Murchison and Allende. In contrast, our Na2O-poor St. Severin charge produced a broadly eucritic melt at this higher f(o)2. This difference in melting behavior is probably because LL chondrites have a much lower bulk Fe/Si ratio than the H, CM, or CV chondrites. C1 NASA,LYNDON B JOHNSON SPACE CTR,HOUSTON,TX 77058. RP JUREWICZ, AJG (reprint author), LOCKHEED ENGN & SCI CO,MAIL CODE C23,2400 NASA RD 1,HOUSTON,TX 77058, USA. NR 45 TC 68 Z9 68 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD JAN PY 1995 VL 59 IS 2 BP 391 EP 408 DI 10.1016/0016-7037(94)00328-J PG 18 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA QF346 UT WOS:A1995QF34600015 ER PT B AU Masouka, P Foresman, T Fifer, S Acevedo, W Clark, S Crawford, J Buchanan, J AF Masouka, P Foresman, T Fifer, S Acevedo, W Clark, S Crawford, J Buchanan, J GP AMER SOC PHOTOGRAMMETRY & REMOTE SENSING TI Visualization techniques for the analysis of Baltimore regional GIS data SO GIS/LIS '95 - ANNUAL CONFERENCE AND EXPOSITION, PROCEEDINGS, VOLS I AND II LA English DT Proceedings Paper CT GIS/LIS 95 Annual Conference and Exposition CY NOV 14-16, 1995 CL NASHVILLE, TN SP Amer Congress Surveying & Mapping, Amer Soc Photogrammetry & Remote Sensing, AM/FM Int, Assoc Amer Geographers, Urban & Reg Informat Syst Assoc, Amer Public Works Assoc C1 UNIV MARYLAND,NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC PHOTOGRAMMETRY & REMOTE SENSING PI BETHESDA PA 5410 GROSVENOR LAND, SUITE 210, BETHESDA, MD 20814-2160 BN 1-57083-026-6 PY 1995 BP 704 EP 712 PG 9 WC Geography; Remote Sensing SC Geography; Remote Sensing GA BF91U UT WOS:A1995BF91U00084 ER PT B AU HATHAWAY, DH AF HATHAWAY, DH BE Ulrich, RK Rhodes, EJ Dappen, W TI Nearly steady flows in gong prototype data SO GONG '94: HELIO- AND ASTERO-SEISMOLOGY FROM THE EARTH AND SPACE SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 2nd GONG Science Conference - Helio-Seismology and Astero-Seismology from the Earth and Space CY MAY 16-20, 1994 CL UNIV SO CALIF, DAVIDSON CONF CTR, LOS ANGELES, CA SP Global Oscillat Network Grp HO UNIV SO CALIF, DAVIDSON CONF CTR C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-95-3 J9 ASTR SOC P PY 1995 VL 76 BP 204 EP 207 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD96T UT WOS:A1995BD96T00040 ER PT B AU DUVALL, TL AF DUVALL, TL BE Ulrich, RK Rhodes, EJ Dappen, W TI Time-distance helioseismology: An update SO GONG '94: HELIO- AND ASTERO-SEISMOLOGY FROM THE EARTH AND SPACE SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT 2nd GONG Science Conference - Helio-Seismology and Astero-Seismology from the Earth and Space CY MAY 16-20, 1994 CL UNIV SO CALIF, DAVIDSON CONF CTR, LOS ANGELES, CA SP Global Oscillat Network Grp HO UNIV SO CALIF, DAVIDSON CONF CTR C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. RI Duvall, Thomas/C-9998-2012 NR 0 TC 22 Z9 22 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-95-3 J9 ASTR SOC P PY 1995 VL 76 BP 465 EP 474 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD96T UT WOS:A1995BD96T00090 ER PT S AU MAGHAMI, PG KENNY, SP GIESY, DP AF MAGHAMI, PG KENNY, SP GIESY, DP BE Culp, RD Medbery, JD TI The PLATSIM software package: A simulation and analysis tool for large-order flexible systems with applications to EOS AM-1 SO GUIDANCE AND CONTROL 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT Annual Rocky-Mountain Guidance and Control Conference CY FEB 01-05, 1995 CL KEYSTONE, CO SP Amer Astronaut Soc, Rocky Mt Sect C1 NASA,LANGLEY RES CTR,HAMPTON,VA 23681. 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 0-87703-399-4 J9 ADV ASTRONAUT SCI PY 1995 VL 88 BP 39 EP 57 PG 3 WC Automation & Control Systems; Engineering, Aerospace; Computer Science, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Computer Science GA BD65K UT WOS:A1995BD65K00003 ER PT S AU RASMUSSEN, RD SINGH, G RATHBUN, DB MACALA, GA AF RASMUSSEN, RD SINGH, G RATHBUN, DB MACALA, GA BE Culp, RD Medbery, JD TI Behavioral model pointing on Cassini using target vectors SO GUIDANCE AND CONTROL 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT Annual Rocky-Mountain Guidance and Control Conference CY FEB 01-05, 1995 CL KEYSTONE, CO SP Amer Astronaut Soc, Rocky Mt Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-87703-399-4 J9 ADV ASTRONAUT SCI PY 1995 VL 88 BP 91 EP 110 PG 4 WC Automation & Control Systems; Engineering, Aerospace; Computer Science, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Computer Science GA BD65K UT WOS:A1995BD65K00006 ER PT S AU SHIREMAN, K SUNKEL, JW AF SHIREMAN, K SUNKEL, JW BE Culp, RD Medbery, JD TI Functional description of the GN&C system for International Space Station Alpha SO GUIDANCE AND CONTROL 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT Annual Rocky-Mountain Guidance and Control Conference CY FEB 01-05, 1995 CL KEYSTONE, CO SP Amer Astronaut Soc, Rocky Mt Sect C1 NASA,LYNDON B JOHNSON SPACE CTR,HOUSTON,TX 77058. 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 0-87703-399-4 J9 ADV ASTRONAUT SCI PY 1995 VL 88 BP 189 EP 199 PG 3 WC Automation & Control Systems; Engineering, Aerospace; Computer Science, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Computer Science GA BD65K UT WOS:A1995BD65K00012 ER PT S AU SEVASTON, GE AGARDY, F ALLEN, J BAUER, F BAUER, T BONE, J CALDWELL, D CASSERINO, J CHALLONER, D CLINGAN, J CRUM, R DARONE, T DORSKY, L DYNES, R FLANAGAN, R GRAVES, P GAMBINO, J KRUEGER, D MEYA, R PRUETT, D RADFORD, W RODRIGUEZALVAREZ, O WARD, D AF SEVASTON, GE AGARDY, F ALLEN, J BAUER, F BAUER, T BONE, J CALDWELL, D CASSERINO, J CHALLONER, D CLINGAN, J CRUM, R DARONE, T DORSKY, L DYNES, R FLANAGAN, R GRAVES, P GAMBINO, J KRUEGER, D MEYA, R PRUETT, D RADFORD, W RODRIGUEZALVAREZ, O WARD, D BE Culp, RD Medbery, JD TI The American Institute of Aeronautics and Astronautics spacecraft Guidance, Navigation and Control interface standards initiative: Overview SO GUIDANCE AND CONTROL 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT Annual Rocky-Mountain Guidance and Control Conference CY FEB 01-05, 1995 CL KEYSTONE, CO SP Amer Astronaut Soc, Rocky Mt Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-87703-399-4 J9 ADV ASTRONAUT SCI PY 1995 VL 88 BP 201 EP 212 PG 4 WC Automation & Control Systems; Engineering, Aerospace; Computer Science, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Computer Science GA BD65K UT WOS:A1995BD65K00013 ER PT S AU ZIMBELMAN, D WALKER, M QUINN, T AF ZIMBELMAN, D WALKER, M QUINN, T BE Culp, RD Medbery, JD TI An innovative approach to the Fast Attitude Control System integration, test and operational support SO GUIDANCE AND CONTROL 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT Annual Rocky-Mountain Guidance and Control Conference CY FEB 01-05, 1995 CL KEYSTONE, CO SP Amer Astronaut Soc, Rocky Mt Sect C1 NASA,GODDARD SPACE FLIGHT CTR,ALTITUDE CONTROL & STABILIZAT BRANCH,GREENBELT,MD 20771. 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 0-87703-399-4 J9 ADV ASTRONAUT SCI PY 1995 VL 88 BP 233 EP 243 PG 3 WC Automation & Control Systems; Engineering, Aerospace; Computer Science, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Computer Science GA BD65K UT WOS:A1995BD65K00015 ER PT S AU AMES, CK BRIGGS, HC AF AMES, CK BRIGGS, HC BE Culp, RD Medbery, JD TI Experimental attitude control simulation architecture for system development and integration SO GUIDANCE AND CONTROL 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT Annual Rocky-Mountain Guidance and Control Conference CY FEB 01-05, 1995 CL KEYSTONE, CO SP Amer Astronaut Soc, Rocky Mt Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-87703-399-4 J9 ADV ASTRONAUT SCI PY 1995 VL 88 BP 245 EP 252 PG 4 WC Automation & Control Systems; Engineering, Aerospace; Computer Science, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Computer Science GA BD65K UT WOS:A1995BD65K00016 ER PT S AU JAROSZ, MM KOLASINSKI, JR CROFT, J AF JAROSZ, MM KOLASINSKI, JR CROFT, J BE Culp, RD Medbery, JD TI Integration and test of the X-Ray Timing Explorer (XTE) spacecraft Attitude Control Subsystem (ACS) SO GUIDANCE AND CONTROL 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT Annual Rocky-Mountain Guidance and Control Conference CY FEB 01-05, 1995 CL KEYSTONE, CO SP Amer Astronaut Soc, Rocky Mt Sect C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. 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 0-87703-399-4 J9 ADV ASTRONAUT SCI PY 1995 VL 88 BP 269 EP 289 PG 3 WC Automation & Control Systems; Engineering, Aerospace; Computer Science, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Computer Science GA BD65K UT WOS:A1995BD65K00018 ER PT S AU SEVASTON, GE AGARDY, F ALLEN, J BAUER, F BAUER, T BONE, J CALDWELL, D CASSERINO, J CHALLONER, D CLINGAN, J CRUM, R DARONE, T DORSKY, L DYNES, R FLANAGAN, R GRAVES, P GAMBINO, J KRUEGER, D MEYA, R PRUETT, D RADFORD, W RODRIGUEZALVAREZ, O WARD, D AF SEVASTON, GE AGARDY, F ALLEN, J BAUER, F BAUER, T BONE, J CALDWELL, D CASSERINO, J CHALLONER, D CLINGAN, J CRUM, R DARONE, T DORSKY, L DYNES, R FLANAGAN, R GRAVES, P GAMBINO, J KRUEGER, D MEYA, R PRUETT, D RADFORD, W RODRIGUEZALVAREZ, O WARD, D BE Culp, RD Medbery, JD TI The American Institute of Aeronautics and Astronautics spacecraft Guidance, Navigation and Control interface standards initiative: Progress to date SO GUIDANCE AND CONTROL 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT Annual Rocky-Mountain Guidance and Control Conference CY FEB 01-05, 1995 CL KEYSTONE, CO SP Amer Astronaut Soc, Rocky Mt Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-87703-399-4 J9 ADV ASTRONAUT SCI PY 1995 VL 88 BP 329 EP 348 PG 4 WC Automation & Control Systems; Engineering, Aerospace; Computer Science, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Computer Science GA BD65K UT WOS:A1995BD65K00021 ER PT S AU ALEXANDER, JW CHANG, DH AF ALEXANDER, JW CHANG, DH BE Culp, RD Medbery, JD TI Simulation for real-time testing of the Cassini star tracking and identification functions SO GUIDANCE AND CONTROL 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT Annual Rocky-Mountain Guidance and Control Conference CY FEB 01-05, 1995 CL KEYSTONE, CO SP Amer Astronaut Soc, Rocky Mt Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-87703-399-4 J9 ADV ASTRONAUT SCI PY 1995 VL 88 BP 377 EP 383 PG 3 WC Automation & Control Systems; Engineering, Aerospace; Computer Science, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Computer Science GA BD65K UT WOS:A1995BD65K00025 ER PT S AU KISSEL, GJ AF KISSEL, GJ BE Culp, RD Medbery, JD TI Precision pointing for the Pluto mission spacecraft SO GUIDANCE AND CONTROL 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT Annual Rocky-Mountain Guidance and Control Conference CY FEB 01-05, 1995 CL KEYSTONE, CO SP Amer Astronaut Soc, Rocky Mt Sect C1 CALTECH,JET PROP LAB,TECH STAFF,PASADENA,CA 91109. 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 0-87703-399-4 J9 ADV ASTRONAUT SCI PY 1995 VL 88 BP 421 EP 432 PG 4 WC Automation & Control Systems; Engineering, Aerospace; Computer Science, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Computer Science GA BD65K UT WOS:A1995BD65K00029 ER PT S AU QUINN, DA BRADLEY, AJ AF QUINN, DA BRADLEY, AJ BE Culp, RD Medbery, JD TI Hubble Space Telescope First Servicing Mission: Operational aspects of the pointing control system SO GUIDANCE AND CONTROL 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT Annual Rocky-Mountain Guidance and Control Conference CY FEB 01-05, 1995 CL KEYSTONE, CO SP Amer Astronaut Soc, Rocky Mt Sect C1 NASA,GODDARD SPACE FLIGHT CTR,GUIDANCE & CONTROL BRANCH,GREENBELT,MD 20771. 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 0-87703-399-4 J9 ADV ASTRONAUT SCI PY 1995 VL 88 BP 477 EP 490 PG 4 WC Automation & Control Systems; Engineering, Aerospace; Computer Science, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Computer Science GA BD65K UT WOS:A1995BD65K00033 ER PT B AU COOK, AL HENDRICKS, HD AF COOK, AL HENDRICKS, HD BE Tamir, T Griffel, G Bertoni, HL TI Linewidth reduction by the formation of a fiber external cavity with the vertical emission of a distributed Bragg reflector laser SO GUIDED-WAVE OPTOELECTRONICS: DEVICE CHARACTERIZATION, ANALYSIS, AND DESIGN LA English DT Proceedings Paper CT 4th Weber-Research-Institute International Symposium on Guided-Wave Optoelectronics - Device Characterization, Analysis, and Design CY OCT 26-28, 1994 CL BROOKLYN, NY SP Weber Res Inst, IEEE Lasers & Electro Opt Soc, Opt Soc Amer C1 NASA,LANGLEY RES CTR,RES & TECHNOL GRP,HAMPTON,VA 23681. 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 0-306-45107-7 PY 1995 BP 105 EP 114 PG 10 WC Engineering, Electrical & Electronic; Optics; Physics, Applied; Telecommunications SC Engineering; Optics; Physics; Telecommunications GA BE03H UT WOS:A1995BE03H00015 ER PT J AU WILSON, JW KIM, M SCHIMMERLING, W BADAVI, FF THIBEAULT, SA CUCINOTTA, FA SHINN, JL KIEFER, R AF WILSON, JW KIM, M SCHIMMERLING, W BADAVI, FF THIBEAULT, SA CUCINOTTA, FA SHINN, JL KIEFER, R TI ISSUES IN-SPACE RADIATION PROTECTION - GALACTIC COSMIC-RAYS SO HEALTH PHYSICS LA English DT Article DE RADIATION PROTECTION; RADIATION RISK; RISK ANALYSIS; SHIELDING ID PARTICLES AB When shielding from cosmic heavy ions, one is faced with limited knowledge about the physical properties and biological responses of these radiations. Herein, the current status of space shielding technology and its impact on radiation health is discussed in terms of conventional protection practice and a test biological response model. The impact of biological response on optimum materials selection for cosmic ray shielding is presented in terms of the transmission characteristics of the shield material. Although liquid hydrogen is an optimum shield material, evaluation of the effectiveness of polymeric structural materials must await improvement in our knowledge of both the biological response and the nuclear processes. C1 COLL WILLIAM & MARY, WILLIAMSBURG, VA 23187 USA. UNIV SPACE RES ASSOC, WASHINGTON, DC 20546 USA. CHRISTOPHER NEWPORT UNIV, NEWPORT NEWS, VA 23601 USA. RP WILSON, JW (reprint author), NASA, LANGLEY RES CTR, HAMPTON, VA 23681 USA. NR 28 TC 66 Z9 69 U1 0 U2 6 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JAN PY 1995 VL 68 IS 1 BP 50 EP 58 DI 10.1097/00004032-199501000-00006 PG 9 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA PX378 UT WOS:A1995PX37800009 PM 7989194 ER PT S AU Vandersande, JW Ewell, R Fleurial, JP Lyon, HB AF Vandersande, JW Ewell, R Fleurial, JP Lyon, HB BE ElGenk, MS TI Thermal management of power electronic circuits using thermoelectric coolers and diamond films SO HEAT TRANSFER - PORTLAND 1995 SE AICHE SYMPOSIUM SERIES LA English DT Proceedings Paper CT AIChE Symposium on Heat Transfer, at the 30th National Heat Transfer Conference CY AUG 05-09, 1995 CL PORTLAND, OR SP Amer Inst Chem Engineers C1 CALTECH,JET PROP LAB,PASADENA,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST CHEMICAL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0065-8812 BN 0-8169-0682-3 J9 AICHE SYM S PY 1995 VL 91 IS 306 BP 353 EP 355 PG 3 WC Engineering, Chemical; Engineering, Mechanical SC Engineering GA BF21L UT WOS:A1995BF21L00045 ER PT S AU PAGE, DE AF PAGE, DE BE Shea, MA Page, DE Smart, DF TI EXPANDING OUR KNOWLEDGE OF THE HELIOSPHERE SO HELIOSPHERE DURING THE DECLINING SOLAR CYCLE SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT D1 1 Symposium of COSPAR Scientific Commission D on the Heliosphere During the Declining Solar Cycle, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res, Sci Comm Solar Terrestrial Phys ID SECTOR STRUCTURE; COSMIC-RAYS; SOLAR; ULYSSES; MODULATION; LATITUDES; HELIUM; SHOCK; GAS AB Milestones on our road to understanding the heliosphere between 1950 and 1988 are recalled. Among these are early studies of solar energetic particles suggesting a heliospheric boundary at 5 AU, the discovery of the solar wind and the sectored nature of the interplanetary magnetic field. Recent results, particularly from the Ulysses spacecraft, confirm the arrival of neutrals from interstellar space, the pick-up of singly charged ions by the solar wind and the acceleration of these ions to become anomalous cosmic rays. Two distinct solar wind regimes have been discovered. At low heliolatitudes a highly variable solar wind blows at an average speed around 450 km s(-1), while at high latitudes a relatively smooth 750 km s(-1) flow is observed. No indicators of a dipole-like magnetic field have been seen by Ulysses in solar polar latitudes. The cosmic radiation increase with latitude is much smaller than predicted. The status of and plans for the Voyager 1 and 2, Pioneer 10 and 11, and Ulysses spacecraft are outlined. RP PAGE, DE (reprint author), JET PROPULS LAB,ESA ULYSSES OFF,MS 264-318,PASADENA,CA 91109, USA. NR 37 TC 6 Z9 6 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042634-4 J9 ADV SPACE RES PY 1995 VL 16 IS 9 BP 5 EP 23 DI 10.1016/0273-1177(95)00310-B PG 19 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA BD20S UT WOS:A1995BD20S00001 ER PT S AU PHILLIPS, JL BAME, SJ FELDMAN, WC GOSLING, JT HAMMOND, CM MCCOMAS, DJ GOLDSTEIN, BE NEUGEBAUER, M AF PHILLIPS, JL BAME, SJ FELDMAN, WC GOSLING, JT HAMMOND, CM MCCOMAS, DJ GOLDSTEIN, BE NEUGEBAUER, M BE Shea, MA Page, DE Smart, DF TI ULYSSES SOLAR-WIND PLASMA OBSERVATIONS DURING THE DECLINING PHASE OF SOLAR-CYCLE-22 SO HELIOSPHERE DURING THE DECLINING SOLAR CYCLE SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT D1 1 Symposium of COSPAR Scientific Commission D on the Heliosphere During the Declining Solar Cycle, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res, Sci Comm Solar Terrestrial Phys ID SECTOR STRUCTURE; EVENTS AB Since launch in October 1990, the Ulysses mission has included an in-ecliptic cruise enroute to Jupiter encounter in February 1992 and a post-Jupiter transit through a wide range of southerly latitudes and heliocentric distances. Here we present results from the solar wind plasma experiment through June 14, 1994, at which time Ulysses was at -68.2 degrees heliographic latitude. During the ecliptic phase of the mission, occurring just after solar maximum, the spacecraft encountered an irregular pattern of solar wind speed and sporadic coronal mass ejections, with mass ejections most prevalent during March 1991. Irregular, small-amplitude solar wind streams prevailed until mid-1992, after which Ulysses encountered a recurrent very high-speed stream from an equatorward extension of the South polar coronal hole. Encounters with the high-density, low-speed plasma from the coronal streamer belt ceased as Ulysses moved to increasing southerly latitudes in 1993. Many forward and reverse shocks associated with corotating interaction regions have been encountered; these shocks all had observable electron foreshocks. The shocks became less prevalent with increasing latitude, with the forward shocks disappearing first because of the tilted streamer belt and the resulting meridional shock propagation. After Ulysses passed -35 degrees in July 1993 the spacecraft encountered only high-speed wind, with a speed range of 700-800 km s(-1) and a density, scaled to 1 AU, averaging 3 cm(-3). Latitudinal gradients in solar wind fluid parameters generally support previous findings, with the gradient in wind speed offset by a gradient in density such that mass and momentum flux vary relatively little. C1 JET PROPULS LAB,PASADENA,CA 91109. RP PHILLIPS, JL (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 18 TC 16 Z9 16 U1 0 U2 1 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042634-4 J9 ADV SPACE RES PY 1995 VL 16 IS 9 BP 85 EP 94 DI 10.1016/0273-1177(95)00318-9 PG 10 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA BD20S UT WOS:A1995BD20S00009 ER PT S AU SMITH, EJ AF SMITH, EJ BE Shea, MA Page, DE Smart, DF TI MAGNETIC OBSERVATIONS DURING THE RECENT DECLINING PHASE OF SOLAR-ACTIVITY SO HELIOSPHERE DURING THE DECLINING SOLAR CYCLE SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT D1 1 Symposium of COSPAR Scientific Commission D on the Heliosphere During the Declining Solar Cycle, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res, Sci Comm Solar Terrestrial Phys ID HELIOSPHERIC SECTOR STRUCTURE; CYCLE VARIATIONS; WIND SPEED; FIELD; ULYSSES; INTENSITY; EVOLUTION; SUN; AU AB Changes in the heliospheric magnetic field during the recent declining phase in solar activity are reviewed and compared with observations during past sunspot cycles. The study is based principally on data obtained by LMP-8 and Ulysses. The field magnitude is found to have increased during the declining phase until it reached a maximum value of 11.5nT in approximate to 1991.5, approximately two years after sunspot maximum. The field of the sun's south pole became negative after a reversal in early 1990. The sector structure disappeared at Ulysses in April 1993 when the latitude of the spacecraft was -30 degrees revealing a low inclination of the heliospheric current sheet. A large outburst of solar activity in March 1991 caused four CME's and numerous shocks at the location of Ulysses. Following a delay of more than a year, a series of recurrent high speed streams and Corotating Interaction Regions commenced in July 1992 which were observed by IMP-8, Ulysses and Voyager 2. In all these respects, the behavior of the magnetic field mimics that seen in the two earlier sunspot cycles. The comprehensive data set suggests a correlation between \B\ and sunspot number. The major solar cycle variations in the radial component (and magnitude) of the field have been successfully reproduced by a recent model consisting of a tilted solar dipole, whose strength and tilt undergo characteristic changes over the sunspot cycle, and the heliospheric current sheet. The large outbursts of activity in mid-1972, mid-1982 and the first quarter of 1991 may represent a characteristic last ''gasp'' of solar activity before the sun evolves to a different state. The recurrent high speed streams in 1973, 1984 and 1992 accompany the development of large asymetrical polar coronal holes and the growth in intensity of the polar cap fields. After they endure for about one year, the polar coronal holes recede and the high speed streams are replaced by weaker streams more characteristic of solar minimum. RP SMITH, EJ (reprint author), CALTECH,JET PROP LAB,PASADENA,CA 91109, USA. NR 33 TC 9 Z9 9 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042634-4 J9 ADV SPACE RES PY 1995 VL 16 IS 9 BP 153 EP 163 DI 10.1016/0273-1177(95)00327-B PG 11 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA BD20S UT WOS:A1995BD20S00018 ER PT S AU SMITH, EJ BALOGH, A LEPPING, RP NEUGEBAUER, M PHILLIPS, J TSURUTANI, BT AF SMITH, EJ BALOGH, A LEPPING, RP NEUGEBAUER, M PHILLIPS, J TSURUTANI, BT BE Shea, MA Page, DE Smart, DF TI ULYSSES OBSERVATIONS OF LATITUDE GRADIENTS IN THE HELIOSPHERIC MAGNETIC-FIELD SO HELIOSPHERE DURING THE DECLINING SOLAR CYCLE SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT D1 1 Symposium of COSPAR Scientific Commission D on the Heliosphere During the Declining Solar Cycle, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res, Sci Comm Solar Terrestrial Phys ID CURRENT SHEET AB Several parameters measured by Ulysses as it traveled southward to heliographic latitudes of -50 degrees are presented and analyzed. The radial component of the magnetic field, averaged over 5 degrees latitude increments and extrapolated back to 1 AU, is found to agree with baseline measurements provided by IMP-8. There is little, if any, evidence of a latitude gradient, a result consistent with the dominance of the magnetic field associated with the heliospheric current sheet and with recent models which include the effect of the current sheet as well as of source surface fields. Thus far, the spiral angle agrees with the Parker spiral assuming a rate of rotation of the field lines at the Sun equal to the equatorial value. No evidence is seen of either a change in rotation rate with latitude or an unwinding of the spiral as suggested by a recent analysis. Hourly variances in the field magnitude and in the sum of the variances in the components, normalized to the square of the observed field strength, show the former to be independent of latitude while the latter shows a strong increase with latitude. These two observations are shown to be associated with Alfven waves that are continuously present at high latitudes. The waves have large amplitudes, extend to long periods, and have important implications for galactic cosmic rays and the solar wind. C1 UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,BLACKETT LAB,LONDON SW7 2BZ,ENGLAND. GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP SMITH, EJ (reprint author), CALTECH,JET PROP LAB,PASADENA,CA 91109, USA. NR 17 TC 18 Z9 18 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042634-4 J9 ADV SPACE RES PY 1995 VL 16 IS 9 BP 165 EP 170 DI 10.1016/0273-1177(95)00328-C PG 6 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA BD20S UT WOS:A1995BD20S00019 ER PT S AU MAVROMICHALAKI, H VASSILAKI, A MARMATSOURI, L MOUSSAS, X QUENBY, JJ SMITH, EJ AF MAVROMICHALAKI, H VASSILAKI, A MARMATSOURI, L MOUSSAS, X QUENBY, JJ SMITH, EJ BE Shea, MA Page, DE Smart, DF TI MICROSTRUCTURE OF THE IMF TURBULENCES AT 2.5 AU SO HELIOSPHERE DURING THE DECLINING SOLAR CYCLE SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT D1 1 Symposium of COSPAR Scientific Commission D on the Heliosphere During the Declining Solar Cycle, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res, Sci Comm Solar Terrestrial Phys AB A detailed analysis of small period (15-900 sec) magnetohydrodynamic (MHD) turbulences of the interplanetary magnetic field (IMF) has been made using Pioneer-11 high time resolution data (0.75 sec) inside a Corotating Interaction Region (CIR) at a heliocentric distance of 2.5 AU in 1973. The metods used are the hodogram analysis, the minimum variance matrix analysis and the coherence analysis, The minimum variance analysis gives evidence of linear polarized wave modes. Coherence analysis has shown that the field fluctuations are dominated by the magnetosonic fast modes with periods 15 sec to 15 min. However, it is also shown that some small amplitude Alfven waves are present in the trailing edge of this region with characteristic periods (15-200 sec). The observed wave modes are locally generated and possibly attributed to the scattering of Alfven waves energy into random magnetosonic waves. C1 UNIV ATHENS,ASTROPHYS ASTRON & MECH SECT,GR-15783 ATHENS,GREECE. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,BLACKETT LAB,LONDON SW7 2BZ,ENGLAND. CALTECH,JET PROP LAB,PASADENA,CA 91109. RP MAVROMICHALAKI, H (reprint author), UNIV ATHENS,NUCL & PARTICLE PHYS SECT,GR-10680 ATHENS,GREECE. 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 0-08-042634-4 J9 ADV SPACE RES PY 1995 VL 16 IS 9 BP 171 EP 174 DI 10.1016/0273-1177(95)00329-D PG 4 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA BD20S UT WOS:A1995BD20S00020 ER PT S AU WHANG, YC BURLAGA, LF AF WHANG, YC BURLAGA, LF BE Shea, MA Page, DE Smart, DF TI REFLECTION AND TRANSMISSION OF GMIR SHOCK AT THE HELIOPAUSE AND THEIR RELATION TO THE 2- AND 3-KHZ RADIO EMISSIONS SO HELIOSPHERE DURING THE DECLINING SOLAR CYCLE SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT D1 1 Symposium of COSPAR Scientific Commission D on the Heliosphere During the Declining Solar Cycle, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res, Sci Comm Solar Terrestrial Phys ID OUTER HELIOSPHERE; TERMINATION SHOCK AB We use Voyager 2 plasma and magnetic field data together with a one-fluid MHD model to study the interactions of the 1991 GMIR shock with the heliopause. The 1991 GMIR is an extraordinarily large global solar wind structure in radial, longitudinal and latitudinal extents. It has a strong shock at the leading edge. After its penetration through the termination shock, the GMIR shock first propagates through the subsonic solar wind, then interacts with the heliopause. The interaction produces a transmitted shock propagating outward, in the interstellar medium, and a reflected shock propagating backward in the subsonic solar wind. We identify the reflected shock and the transmitted shock as the possible source of the radio noise detected at Voyagers. The plasma frequency behind the reflected and the transmitted shock can be, respectively, responsible for the 2- and 3-kHz radio emissions. The two bands of radio noise are emitted from sources on both sides of the heliopause starting at about the same time. If the emission is generated by f(p)-radiation then the heliopause is located at R similar to 130 AU. If the emission is generated by 2f(p)-radiation then R similar to 150 AU. Because the relative speed of the interstellar plasma with respect to the sun appears to be sub-Alfvenic, it is very unlikely there is a fast-bow shock of the heliosphere. C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RP WHANG, YC (reprint author), CATHOLIC UNIV AMER,WASHINGTON,DC 20064, USA. NR 7 TC 2 Z9 2 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042634-4 J9 ADV SPACE RES PY 1995 VL 16 IS 9 BP 291 EP 295 DI 10.1016/0273-1177(95)00350-N PG 5 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA BD20S UT WOS:A1995BD20S00040 ER PT B AU SZOBOSZLAY, Z HAWORTH, L REYNOLDS, T LEE, A HALMOS, Z AF SZOBOSZLAY, Z HAWORTH, L REYNOLDS, T LEE, A HALMOS, Z BE Lewandowski, RJ Stephens, W Haworth, LA TI EFFECT OF FIELD-OF-VIEW RESTRICTION ON ROTORCRAFT PILOT WORKLOAD AND PERFORMANCE - PRELIMINARY RESULTS SO HELMET- AND HEAD-MOUNTED DISPLAYS AND SYMBOLOGY DESIGN REQUIREMENTS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT SPIE Helmet-Mounted and Head-Mounted Displays and Symbology Design Requirements II Conference CY APR 18-19, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE FIELD OF VIEW; OVERLAP; HELMET MOUNTED DISPLAY; NIGHT VISION; AIRCRAFT; ROTORCRAFT C1 USA,AVIAT RES,CTR DEV & ENGN,AEROFLIGHTDYNAM DIRECTORATE,AMES RES CTR,MOFFETT FIELD,CA 94035. 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 0-8194-1818-8 J9 P SOC PHOTO-OPT INS PY 1995 VL 2465 BP 142 EP 153 DI 10.1117/12.209732 PG 12 WC Engineering, Aerospace; Optics SC Engineering; Optics GA BD19T UT WOS:A1995BD19T00014 ER PT B AU HAWORTH, LA SHARKEY, T LEE, A AF HAWORTH, LA SHARKEY, T LEE, A BE Lewandowski, RJ Stephens, W Haworth, LA TI TRISTAR-III - HELMET-MOUNTED DISPLAY SYMBOLOGY SO HELMET- AND HEAD-MOUNTED DISPLAYS AND SYMBOLOGY DESIGN REQUIREMENTS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT SPIE Helmet-Mounted and Head-Mounted Displays and Symbology Design Requirements II Conference CY APR 18-19, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE HELMET MOUNTED DISPLAY; SYMBOLOGY; ROTORCRAFT, HELICOPTER; VISUALLY COUPLED C1 NASA,AMES RES CTR,USA,AVIAT RES,CTR DEV & ENGN,AEROFLIGHTDYNAM DIRECTORATE,MOFFETT FIELD,CA 94035. 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 0-8194-1818-8 J9 P SOC PHOTO-OPT INS PY 1995 VL 2465 BP 235 EP 245 DI 10.1117/12.209742 PG 11 WC Engineering, Aerospace; Optics SC Engineering; Optics GA BD19T UT WOS:A1995BD19T00023 ER PT S AU BILITZA, D AF BILITZA, D BE Rawer, K Bilitza, D Singer, W TI THE HIGH-LATITUDES IN THE INTERNATIONAL REFERENCE IONOSPHERE - PROCEEDINGS OF THE C4 MEETING OF COSPAR SCIENTIFIC COMMISSION-C WHICH WAS HELD DURING THE 30TH COSPAR SCIENTIFIC ASSEMBLY, HAMBURG, GERMANY, 11-21 JULY 1994 SO HIGH LATITUDES IN THE INTERNATIONAL REFERENCE IONOSPHERE SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT C4 Meeting of COSPAR Scientific-Commission-C on the High Latitudes in the International Reference Ionosphere, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP COMM SPACE RES, INT UNION RADIO SCI, INT UNION GEODESY & GEOPHYS, INT ASSOC GEOMAGNETISM & AERON ID CONDUCTIVITY AB The final discussion session on July 21 from 3 PM to 6 PM concluded the very successful 2-day IRI Workshop on high-latitude ionospheric modeling during the 1994 COSPAR assembly, About 30 scientists participated in this final session which was also declared the IRI Working Group meeting. The discussion session was chaired by K. Rawer who begun by summarizing the results of the past two days of talks and posters. Presentations at this workshop underlined the complex variation patterns and dependencies of ionospheric parameters in the high-latitude ionosphere. It is clear that a different treatment has to be chosen for this part of the globe. Regional mapping, storm-time updating and introduction of amoral boundaries and characteristics are needed to bring IRI closer to red conditions. As a result of the presentations and final discussions the following improvements will be introduced into IRI. [Responsible task leaders and specific actions are indicated at the end of each section] RP BILITZA, D (reprint author), NASA,GODDARD SPACE FLIGHT CTR,NSSDC,HSTX,CODE 633,GREENBELT,MD 20771, USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042621-2 J9 ADV SPACE RES PY 1995 VL 16 IS 1 BP 1 EP 4 DI 10.1016/0273-1177(95)90898-6 PG 4 WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Geology; Meteorology & Atmospheric Sciences GA BD12N UT WOS:A1995BD12N00001 ER PT S AU BILITZA, D AF BILITZA, D BE Rawer, K Bilitza, D Singer, W TI INCLUDING AURORAL OVAL BOUNDARIES IN THE IRI MODEL SO HIGH LATITUDES IN THE INTERNATIONAL REFERENCE IONOSPHERE SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT C4 Meeting of COSPAR Scientific-Commission-C on the High Latitudes in the International Reference Ionosphere, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP COMM SPACE RES, INT UNION RADIO SCI, INT UNION GEODESY & GEOPHYS, INT ASSOC GEOMAGNETISM & AERON ID ENERGY FLUX; CONDUCTIVITY; PATTERN AB At the last International Reference Ionosphere (IRI) Workshop it was decided that future editions of the model should include a representation of the amoral oval boundaries. In this paper we review the different existing parameterizations of the amoral oval discussing their data base, boundary criteria, mathematical formulation, and overall usefulness for IRI. As a first candidate for incorporation into IRI we recommend the parameterization of the Feldstein /1/ ovals by Holzworth and Meng /2/. Ways of implementing this model into IRI are discussed. We will also address adjustability with user-provided boundaries or boundary-related parameters, to better support storm-related studies. RP BILITZA, D (reprint author), NASA,GODDARD SPACE FLIGHT CTR,NSSDC,HSTX,CODE 633,GREENBELT,MD 20771, USA. NR 11 TC 5 Z9 5 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042621-2 J9 ADV SPACE RES PY 1995 VL 16 IS 1 BP 13 EP 16 DI 10.1016/0273-1177(95)00093-T PG 4 WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Geology; Meteorology & Atmospheric Sciences GA BD12N UT WOS:A1995BD12N00003 ER PT S AU GREBOWSKY, JM HOEGY, WR AF GREBOWSKY, JM HOEGY, WR BE Rawer, K Bilitza, D Singer, W TI HIGH-LATITUDE ION COMPOSITION SO HIGH LATITUDES IN THE INTERNATIONAL REFERENCE IONOSPHERE SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT C4 Meeting of COSPAR Scientific-Commission-C on the High Latitudes in the International Reference Ionosphere, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP COMM SPACE RES, INT UNION RADIO SCI, INT UNION GEODESY & GEOPHYS, INT ASSOC GEOMAGNETISM & AERON ID ATMOSPHERE EXPLORER-C; MASS SPECTROMETER; IONOSPHERE; MINIMUM AB A data base comprised of all available ionosphere satellite ion composition measurements - the Goddard Comprehensive Ionosphere Data Base (GCID) - has been set up on optical disks for convenient merging and accessing of data from different satellites. This data set has recently been expanded to include all accessible satellite electron density and plasma temperature measurements. This paper demonstrates with a couple examples, the potential of GCID as an alternative to empirical models for understanding ionosphere physics and chemistry. Through binning techniques GCID provides a tool that complements and improves on the international Reference Ionosphere model (IRI) in delineating the topology of high latitude ion composition. GCID provides at a glance a measure of the local statistical variability of the ion composition that is not in empirical models such as IRI. Further, using the data to determine the spatial and geophysical parameter range over which the minor ion species are approximately in chemical equilibrium, the number of data points available for empirical ion composition models' can be increased by using the statistically more reliable neutral and electron empirical models to derive ion composition. Currently available empirical models are not capable of adequately defining the complex high latitude distribution - a measure of the variability is needed. RP GREBOWSKY, JM (reprint author), NASA,GODDARD SPACE FLIGHT CTR,CODE 914,GREENBELT,MD 20771, USA. RI Grebowsky, Joseph/I-7185-2013 NR 15 TC 6 Z9 6 U1 0 U2 1 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042621-2 J9 ADV SPACE RES PY 1995 VL 16 IS 1 BP 95 EP 104 DI 10.1016/0273-1177(95)00104-M PG 10 WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Geology; Meteorology & Atmospheric Sciences GA BD12N UT WOS:A1995BD12N00014 ER PT S AU Simon, HD Strohmaier, E AF Simon, HD Strohmaier, E BE Hertzberger, B Serazzi, G TI Statistical analysis of NAS parallel benchmarks and LINPACK results SO HIGH-PERFORMANCE COMPUTING AND NETWORKING SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT International Conference and Exhibition on High-Performance Computing and Networking CY MAY 03-05, 1995 CL MILAN, ITALY AB In the last three years extensive performance data have been reported for parallel machines both based on the NAS Parallel Benchmarks [1] [2] and on LINPACK [3]. In this study we have used the reported benchmark results and performed a number of statistical experiments. These included cluster, factor and regression analyses, as well as fitting Amdahl's Law to the data. All statistical experiments were done for absolute performances as well as for the corresponding efficiencies. C1 UNIV MANNHEIM,CTR COMP,D-68131 MANNHEIM,GERMANY. RP Simon, HD (reprint author), NASA,AMES RES CTR,NUMER AERODYNAM SIMULAT SYST DIV,APPL RES BRANCH,MAIL STOP T27A-1,MOFFETT FIELD,CA 94035, USA. NR 4 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY SN 0302-9743 BN 3-540-59393-4 J9 LECT NOTES COMPUT SC PY 1995 VL 919 BP 626 EP 633 PG 8 WC Computer Science, Theory & Methods SC Computer Science GA BE66H UT WOS:A1995BE66H00091 ER PT S AU WHITTENBERGER, JD NOEBE, RD WHEELER, DR AF WHITTENBERGER, JD NOEBE, RD WHEELER, DR BE Horton, J Baker, I Hanada, S Noebe, RD Schwartz, DS TI 1200-K COMPRESSIVE PROPERTIES OF N-CONTAINING NIAL SO HIGH-TEMPERATURE ORDERED INTERMETALLIC ALLOYS VI, PTS 1 AND 2 SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on High-Temperature Ordered Intermetallic Alloys VI, at the 1994 Fall Materials-Research-Society Meeting CY NOV 28-DEC 01, 1994 CL BOSTON, MA SP MAT RES SOC C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 2 Z9 2 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-265-0 J9 MATER RES SOC SYMP P PY 1995 VL 364 BP 279 EP 284 PG 6 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BC94F UT WOS:A1995BC94F00043 ER PT S AU NOEBE, RD LERCH, BA RAO, KBS AF NOEBE, RD LERCH, BA RAO, KBS BE Horton, J Baker, I Hanada, S Noebe, RD Schwartz, DS TI ASSESSMENT OF MICROALLOYING EFFECTS ON THE HIGH TEMPERATURE FATIGUE BEHAVIOR OF NIAL SO HIGH-TEMPERATURE ORDERED INTERMETALLIC ALLOYS VI, PTS 1 AND 2 SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on High-Temperature Ordered Intermetallic Alloys VI, at the 1994 Fall Materials-Research-Society Meeting CY NOV 28-DEC 01, 1994 CL BOSTON, MA SP MAT RES SOC C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 3 Z9 3 U1 0 U2 1 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-265-0 J9 MATER RES SOC SYMP P PY 1995 VL 364 BP 291 EP 296 PG 6 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BC94F UT WOS:A1995BC94F00045 ER PT S AU SMIALEK, JL NESBITT, JA BRINDLEY, WJ BRADY, MP DOYCHAK, J DICKERSON, RM HULL, DR AF SMIALEK, JL NESBITT, JA BRINDLEY, WJ BRADY, MP DOYCHAK, J DICKERSON, RM HULL, DR BE Horton, J Baker, I Hanada, S Noebe, RD Schwartz, DS TI SERVICE LIMITATIONS FOR OXIDATION RESISTANT INTERMETALLIC COMPOUNDS SO HIGH-TEMPERATURE ORDERED INTERMETALLIC ALLOYS VI, PTS 1 AND 2 SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on High-Temperature Ordered Intermetallic Alloys VI, at the 1994 Fall Materials-Research-Society Meeting CY NOV 28-DEC 01, 1994 CL BOSTON, MA SP MAT RES SOC C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RI Brady, Michael/A-8122-2008 OI Brady, Michael/0000-0003-1338-4747 NR 0 TC 15 Z9 15 U1 0 U2 1 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-265-0 J9 MATER RES SOC SYMP P PY 1995 VL 364 BP 1273 EP 1284 PG 12 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BC94F UT WOS:A1995BC94F00195 ER PT S AU BRADY, MP SMIALEK, JL HUMPHREY, DL AF BRADY, MP SMIALEK, JL HUMPHREY, DL BE Horton, J Baker, I Hanada, S Noebe, RD Schwartz, DS TI MICROSTRUCTURE OXIDATION MICROHARDNESS CORRELATIONS IN gamma-BASED AND tau-BASED AL-TI-CR ALLOYS SO HIGH-TEMPERATURE ORDERED INTERMETALLIC ALLOYS VI, PTS 1 AND 2 SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on High-Temperature Ordered Intermetallic Alloys VI, at the 1994 Fall Materials-Research-Society Meeting CY NOV 28-DEC 01, 1994 CL BOSTON, MA SP MAT RES SOC C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RI Brady, Michael/A-8122-2008 OI Brady, Michael/0000-0003-1338-4747 NR 0 TC 12 Z9 12 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-265-0 J9 MATER RES SOC SYMP P PY 1995 VL 364 BP 1309 EP 1314 PG 6 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BC94F UT WOS:A1995BC94F00200 ER PT S AU Connell, JW Smith, JG Hergenrother, PM AF Connell, JW Smith, JG Hergenrother, PM BE Tant, MR Connell, JW McManus, HLN TI Properties and potential applications of poly(arylene ether benzimidazole)s SO HIGH-TEMPERATURE PROPERTIES AND APPLICATIONS OF POLYMERIC MATERIALS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on High-Temperature Properties and Applications of Polymeric Materials, at the 207th National Meeting of the American-Chemical-Society CY MAR 13-17, 1994 CL SAN DIEGO, CA SP Sci & Engn Inc, Div Polym Mat, Amer Chem Soc ID SPACE STATION; FILMS AB As part of a NASA program on high performance polymers for potential aerospace applications, poly(arylene ether benzimidazole)s (PAEBIs) are under evaluation. The polymers are prepared by the aromatic nucleophilic displacement reaction of 5,5'-bis[2-(4-hydroxyphenyl)benzimidazole] with activated aromatic difluorides in a polar aprotic solvent using potassium carbonate at elevated temperatures under nitrogen. Based on preliminary screening of various material properties, two polymers were selected for more extensive evaluation. An isophthaloyl-containing PAEBI was evaluated for potential use as an adhesive and composite resin matrix. Controlled molecular weight versions of this material exhibited a good combination of processability and high unidirectional composite properties up to 232 degrees C. This polymer also exhibited excellent adhesion to copper and polyimide, and moderate adhesion to titanium. A phosphine oxide-containing PAEBI was screened for potential use on spacecraft in low Earth orbit where resistance to atomic oxygen is required. Thin films of this material were exposed to an oxygen plasma under vacuum and the weight loss of the film was monitored as a function of exposure time. Relative to uncoated Kapton(R)HN film, the phosphine oxide-containing poly(arylene ether benzimidazole) film exhibited significantly lower weight loss rates. In addition, this material exhibited a non-linear weight loss rate as compared to Kapton(R)HN film which exhibited a linear weight loss rate. Upon exposure to the oxygen plasma, the phosphine oxide-containing poly(arylene ether benzimidazole) formed a phosphate-type surface coating as evidenced by x-ray photoelectron spectroscopy. C1 VIRGINIA COMMONWEALTH UNIV,DEPT CHEM,RICHMOND,VA 23284. RP Connell, JW (reprint author), NASA,LANGLEY RES CTR,DIV MAT,HAMPTON,VA 23681, USA. NR 27 TC 4 Z9 4 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 SN 0097-6156 BN 0-8412-3313-6 J9 ACS SYM SER PY 1995 VL 603 BP 186 EP 199 PG 14 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA BE31K UT WOS:A1995BE31K00012 ER PT S AU Rich, DC Cebe, P StClair, AK AF Rich, DC Cebe, P StClair, AK BE Tant, MR Connell, JW McManus, HLN TI Refractive indices of aromatic polyimides SO HIGH-TEMPERATURE PROPERTIES AND APPLICATIONS OF POLYMERIC MATERIALS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on High-Temperature Properties and Applications of Polymeric Materials, at the 207th National Meeting of the American-Chemical-Society CY MAR 13-17, 1994 CL SAN DIEGO, CA SP Sci & Engn Inc, Div Polym Mat, Amer Chem Soc AB Experimentally measured refractive indices of polyimides of varying chemistry are compared to predicted values calculated from the methods of van Krevelen (1) and Bicerano (2). The refractive index reducing effects of fluorinated substituents, such as the 6F and SF5 groups, are of particular interest. The prediction techniques successfully estimate the decrease in refractive index with increasing fluorine content that has been widely observed experimentally. In addition, while measured refractive indices of non-fluorinated polyimides generally deviate above predicted values, measured refractive indices of polyimides with high fluorine content are very close to predicted values. Disparities between measured and predicted refractive indices are explained in terms of crystallinity and inter-chain interaction, both of which are expected to be more prevalent in the non-fluorinated materials. C1 NASA,LANGLEY RES CTR,DIV MAT,HAMPTON,VA 23681. RP Rich, DC (reprint author), MIT,DEPT MAT SCI & ENGN,CAMBRIDGE,MA 02139, USA. NR 11 TC 3 Z9 3 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 SN 0097-6156 BN 0-8412-3313-6 J9 ACS SYM SER PY 1995 VL 603 BP 238 EP 246 PG 9 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA BE31K UT WOS:A1995BE31K00016 ER PT S AU DICKEY, JO AF DICKEY, JO BE Appenzeller, I TI Earth rotation variations from hours to centuries SO HIGHLIGHTS OF ASTRONOMY SE IAU SYMPOSIA LA English DT Proceedings Paper CT XXIInd IAU General Assembly - Highlights of Astronomy CY AUG, 1994 CL THE HAGUE, NETHERLANDS SP Int Astron Union C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 3 Z9 3 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-3553-8 J9 IAU SYMP PY 1995 VL 10 BP 17 EP 44 PG 28 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD95U UT WOS:A1995BD95U00002 ER PT S AU STANDISH, EM AF STANDISH, EM BE Appenzeller, I TI Report of the IAU WGAS sub-group on numerical standards SO HIGHLIGHTS OF ASTRONOMY SE IAU SYMPOSIA LA English DT Proceedings Paper CT XXIInd IAU General Assembly - Highlights of Astronomy CY AUG, 1994 CL THE HAGUE, NETHERLANDS SP Int Astron Union C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 10 Z9 11 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-3553-8 J9 IAU SYMP PY 1995 VL 10 BP 180 EP 184 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD95U UT WOS:A1995BD95U00053 ER PT S AU LIESKE, JH AF LIESKE, JH BE Appenzeller, I TI Two-tier system of astronomical constants SO HIGHLIGHTS OF ASTRONOMY SE IAU SYMPOSIA LA English DT Proceedings Paper CT XXIInd IAU General Assembly - Highlights of Astronomy CY AUG, 1994 CL THE HAGUE, NETHERLANDS SP Int Astron Union C1 JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-3553-8 J9 IAU SYMP PY 1995 VL 10 BP 197 EP 197 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD95U UT WOS:A1995BD95U00057 ER PT S AU STANDISH, EM AF STANDISH, EM BE Appenzeller, I TI The orientation of future JPL planetary ephemerides SO HIGHLIGHTS OF ASTRONOMY SE IAU SYMPOSIA LA English DT Proceedings Paper CT XXIInd IAU General Assembly - Highlights of Astronomy CY AUG, 1994 CL THE HAGUE, NETHERLANDS SP Int Astron Union C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-3553-8 J9 IAU SYMP PY 1995 VL 10 BP 204 EP 204 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD95U UT WOS:A1995BD95U00064 ER PT S AU WILLIAMS, JG NEWHALL, XX DICKEY, JO AF WILLIAMS, JG NEWHALL, XX DICKEY, JO BE Appenzeller, I TI Determination of precession and nutation from lunar laser ranging analysis. SO HIGHLIGHTS OF ASTRONOMY SE IAU SYMPOSIA LA English DT Proceedings Paper CT XXIInd IAU General Assembly - Highlights of Astronomy CY AUG, 1994 CL THE HAGUE, NETHERLANDS SP Int Astron Union C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-3553-8 J9 IAU SYMP PY 1995 VL 10 BP 214 EP 217 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD95U UT WOS:A1995BD95U00067 ER PT S AU GROSS, RS AF GROSS, RS BE Appenzeller, I TI Observations of the celestial ephemeris pole SO HIGHLIGHTS OF ASTRONOMY SE IAU SYMPOSIA LA English DT Proceedings Paper CT XXIInd IAU General Assembly - Highlights of Astronomy CY AUG, 1994 CL THE HAGUE, NETHERLANDS SP Int Astron Union C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-3553-8 J9 IAU SYMP PY 1995 VL 10 BP 232 EP 236 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD95U UT WOS:A1995BD95U00071 ER PT S AU VENKATAKRISHNAN, P AF VENKATAKRISHNAN, P BE Appenzeller, I TI Observable signals of coronal heating processes SO HIGHLIGHTS OF ASTRONOMY SE IAU SYMPOSIA LA English DT Proceedings Paper CT XXIInd IAU General Assembly - Highlights of Astronomy CY AUG, 1994 CL THE HAGUE, NETHERLANDS SP Int Astron Union C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,SPACE SCI LAB,HUNTSVILLE,AL 35812. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-3553-8 J9 IAU SYMP PY 1995 VL 10 BP 305 EP 306 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD95U UT WOS:A1995BD95U00089 ER PT S AU HANNER, MS AF HANNER, MS BE Appenzeller, I TI Dust around young stars: How related to solar system dust? SO HIGHLIGHTS OF ASTRONOMY SE IAU SYMPOSIA LA English DT Proceedings Paper CT XXIInd IAU General Assembly - Highlights of Astronomy CY AUG, 1994 CL THE HAGUE, NETHERLANDS SP Int Astron Union C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-3553-8 J9 IAU SYMP PY 1995 VL 10 BP 351 EP 392 PG 42 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD95U UT WOS:A1995BD95U00109 ER PT S AU HUBENY, I AF HUBENY, I BE Appenzeller, I TI Hydrogen line profiles SO HIGHLIGHTS OF ASTRONOMY SE IAU SYMPOSIA LA English DT Proceedings Paper CT XXIInd IAU General Assembly - Highlights of Astronomy CY AUG, 1994 CL THE HAGUE, NETHERLANDS SP Int Astron Union C1 NASA,GODDARD SPACE FLIGHT CTR,UNIV SPACE RES ASSOC,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-3553-8 J9 IAU SYMP PY 1995 VL 10 BP 411 EP 414 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD95U UT WOS:A1995BD95U00114 ER PT S AU LANZ, T AF LANZ, T BE Appenzeller, I TI Interpreting the spectra of chemically peculiar stars SO HIGHLIGHTS OF ASTRONOMY SE IAU SYMPOSIA LA English DT Proceedings Paper CT XXIInd IAU General Assembly - Highlights of Astronomy CY AUG, 1994 CL THE HAGUE, NETHERLANDS SP Int Astron Union C1 NASA,GODDARD SPACE FLIGHT CTR,UNIV SPACE RES ASSOC,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-3553-8 J9 IAU SYMP PY 1995 VL 10 BP 582 EP 584 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD95U UT WOS:A1995BD95U00167 ER PT S AU RUBIN, TH KUNZE, D YAMAMOTO, T AF RUBIN, TH KUNZE, D YAMAMOTO, T BE Appenzeller, I TI Nebular observations and photoionization models can tell us about atmospheres of hot stars SO HIGHLIGHTS OF ASTRONOMY SE IAU SYMPOSIA LA English DT Proceedings Paper CT XXIInd IAU General Assembly - Highlights of Astronomy CY AUG, 1994 CL THE HAGUE, NETHERLANDS SP Int Astron Union C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0074-1809 BN 0-7923-3553-8 J9 IAU SYMP PY 1995 VL 10 BP 587 EP 588 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BD95U UT WOS:A1995BD95U00170 ER PT B AU CORKER, K LOZITO, S PISANICH, G AF CORKER, K LOZITO, S PISANICH, G BE Fuller, R Johnston, N McDonald, N TI FLIGHT CREW PERFORMANCE IN AUTOMATED AIR TRAFFIC MANAGEMENT SO HUMAN FACTORS IN AVIATION OPERATIONS - PROCEEDINGS OF THE 21ST CONFERENCE OF THE EUROPEAN ASSOCIATION FOR AVIATION PSYCHOLOGY (EAAP), VOL 3 LA English DT Proceedings Paper CT 21st Conference of the European-Association-for-Aviation-Psychology CY 1994 CL IRELAND SP EUROPEAN ASSOC AVIAT PSYCHOL RP CORKER, K (reprint author), NASA,AMES RES CTR,MOFFETT FIELD,CA 94035, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AVEBURY PI ALDERSHOT PA GOWER HOUSE, CROFT RD, ALDERSHOT, HANTS, ENGLAND GU11 3HR BN 0-291-39825-1 PY 1995 BP 69 EP 74 PG 6 WC Ergonomics; Psychology, Applied SC Engineering; Psychology GA BC63R UT WOS:A1995BC63R00011 ER PT B AU AHUMADA, AJ WATSON, AB ROHALY, AM AF AHUMADA, AJ WATSON, AB ROHALY, AM BE Rogowitz, BE Allebach, JP TI MODELS OF HUMAN IMAGE DISCRIMINATION PREDICT OBJECT DETECTION IN NATURAL BACKGROUNDS SO HUMAN VISION, VISUAL PROCESSING, AND DIGITAL DISPLAY VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Human Vision, Visual Processing, and Digital Display VI CY FEB 06-08, 1995 CL SAN JOSE, CA SP SOC IMAGING SCI & TECHNOL, SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE IMAGE QUALITY; TARGET DETECTION; VISION MODELS; CONTRAST SENSITIVITY C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. NR 0 TC 14 Z9 14 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1758-0 J9 P SOC PHOTO-OPT INS PY 1995 VL 2411 BP 355 EP 362 PG 8 WC Computer Science, Artificial Intelligence; Computer Science, Software Engineering; Optics SC Computer Science; Optics GA BD03V UT WOS:A1995BD03V00034 ER PT J AU TOUBLANC, D PARISOT, JP BRILLET, J GAUTIER, D RAULIN, F MCKAY, CP AF TOUBLANC, D PARISOT, JP BRILLET, J GAUTIER, D RAULIN, F MCKAY, CP TI PHOTOCHEMICAL MODELING OF TITANS ATMOSPHERE SO ICARUS LA English DT Review ID VOYAGER INFRARED OBSERVATIONS; KINETIC DATA-BASE; TEMPERATURE-DEPENDENCE; RATE-CONSTANT; VACUUM ULTRAVIOLET; RADICAL REACTIONS; COMBUSTION CHEMISTRY; PRESSURE-DEPENDENCE; ELECTRONIC-SPECTRA; CARBON-MONOXIDE AB We have developed a new photochemical model of Titan's atmosphere which includes all the important compounds and reactions in spherical geometry from the surface to 1240 km. Compared to the previous model of Yung et al. (1984, Astrophys. J. Suppl. 55, 465-506), the most significant recent change in the reactions used is the updated methane photodissociation scheme (Mordaunt et al. 1993, J. Chem. Phys. 98(3), 2054-2065). Moreover, the transfer of the solar radiation in the atmosphere and the photolysis rates have been calculated by using a Monte Carlo code. Finally, the eddy diffusion coefficient profile is adjusted in order to fit the mean vertical distribution of HCN retrieved from millimeter groundbased observations of Tanguy et al. (1990, Icarus, 85, 43-57) using new values for the boundary flux of atomic nitrogen (Strobel et al. 1992, Icarus 100, 512-526). We have run the model in both steady-state and diurnal modes, with 62 species involved in 249 reactions. There is little difference between diurnal and steady-state results. Overall our results are in a closer agreement with the abundances inferred from the Voyager infrared measurements at the equator than the Yung et al. results. We find that the catalytic scheme for H recombination invoked by Yung et al. only slightly improves the model results and we conclude that this scheme is not essential to fit observations. (C) 1995 Academic Press, Inc. C1 OBSERV MEUDON, F-92195 MEUDON, FRANCE. UNIV PARIS 12, F-94010 CRETEIL, FRANCE. NASA, AMES RES CTR, MOFFETT FIELD, CA 94035 USA. RP TOUBLANC, D (reprint author), OBSERV BORDEAUX, BP 89, F-33270 FLOIRAC, FRANCE. NR 107 TC 304 Z9 305 U1 5 U2 28 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0019-1035 EI 1090-2643 J9 ICARUS JI Icarus PD JAN PY 1995 VL 113 IS 1 BP 2 EP 26 DI 10.1006/icar.1995.1002 PG 25 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA QJ539 UT WOS:A1995QJ53900001 PM 11538950 ER PT J AU ENCRENAZ, T LELLOUCH, E CERNICHARO, J PAUBERT, G GULKIS, S AF ENCRENAZ, T LELLOUCH, E CERNICHARO, J PAUBERT, G GULKIS, S TI A TENTATIVE DETECTION OF THE 183-GHZ WATER-VAPOR LINE IN THE MARTIAN ATMOSPHERE - CONSTRAINTS UPON THE H2O ABUNDANCE AND VERTICAL-DISTRIBUTION SO ICARUS LA English DT Article ID MARS ATMOSPHERE; CARBON-MONOXIDE; VARIABILITY; ISM; HEMISPHERE; SEASON AB The 183-GHz water vapor line was tentatively detected on Mars in January 1991, with the IRAM 30-m millimeter antenna, under extremely dry atmospheric conditions. The measurement refers to the whole disk. The spectral line, although marginally detected, can be fit with a constant H2O mixing ratio of 1.0 x 10(-5), which corresponds to a water abundance of 1 pr-mu m; in any case, an upper limit of 3 pr-mu m is inferred. This value is comparable to the very small abundances measured by Clancy (1992, Icarus 100, 48-59) 5 five weeks before our observation and seems to imply both seasonal and long-term variations in the martian water cycle. (C) 1995 Academic Press, Inc. C1 CTR ASTRON YEBES,E-19080 GUADALAJARA,SPAIN. IRAM,E-18012 GRANADA,SPAIN. CALTECH,JET PROP LAB,PASADENA,CA 91109. RP ENCRENAZ, T (reprint author), OBSERV PARIS,DESPA,F-92195 MEUDON,FRANCE. NR 21 TC 24 Z9 24 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0019-1035 J9 ICARUS JI Icarus PD JAN PY 1995 VL 113 IS 1 BP 110 EP 118 DI 10.1006/icar.1995.1009 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA QJ539 UT WOS:A1995QJ53900008 ER PT J AU BLANEY, DL JOHNSON, TV MATSON, DL VEEDER, GJ AF BLANEY, DL JOHNSON, TV MATSON, DL VEEDER, GJ TI VOLCANIC-ERUPTIONS ON IO - HEAT-FLOW, RESURFACING, AND LAVA COMPOSITION SO ICARUS LA English DT Note ID SILICATE VOLCANISM; HOTSPOTS; RATES AB We model an infrared outburst on Io as being due to a large, erupting lava flow which increased its area at a rate of 1.5 x 10(5) m(2) sec(-1) and cooled from 1225 to 555 K over the 2.583-hr period of observation. The inferred effusion rate of 3 x 10(5) m(3) sec(-1) for this eruption is very high, but is not unprecedented on the Earth and is similar to the high eruption rates suggested for early lunar volcanism. Eruptions occur similar to 6% of the time on Io. These eruptions provide ample resurfacing to explain Io's lack of impact craters. We suggest that the large total radiometric heat flow, 10(14) W, and the size and temperature distribution of the thermal anomalies (McEwen ef al. 1992, Bull. Am. Astron. Sec. 24, 935; Veeder et al. 1994, J. Geophys. Res. 99, 17,095-17,162) can be accounted for by a series of silicate lava flows in various stages of cooling. We propose that the whole suite of Io's currently observed thermal anomalies was produced by multiple, high-eruptive-rate silicate flows within the past century. (C) 1995 Academic Press, Inc. C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 30 TC 73 Z9 73 U1 0 U2 4 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0019-1035 J9 ICARUS JI Icarus PD JAN PY 1995 VL 113 IS 1 BP 220 EP 225 DI 10.1006/icar.1995.1020 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA QJ539 UT WOS:A1995QJ53900019 ER PT B AU HINEDI, S SIMON, M RAPHAELI, D AF HINEDI, S SIMON, M RAPHAELI, D GP IEEE TI The performance of noncoherent orthogonal M-FSK in the presence of timing and frequency errors SO ICC '95 - 1995 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CONFERENCE RECORD, VOLS 1-3: COMMUNICATIONS - GATEWAY TO GLOBALIZATION LA English DT Proceedings Paper CT 1995 IEEE International Conference on Communications - Communications: Gateway to Globalization CY JUN 18-22, 1995 CL SEATTLE, WA SP IEEE, Commun Soc, IEEE, Seattle Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2487-0 PY 1995 BP 35 EP 39 PG 5 WC Engineering, Aerospace; Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Computer Science; Optics; Telecommunications GA BD72P UT WOS:A1995BD72P00007 ER PT B AU DIVSALAR, D POLLARA, F AF DIVSALAR, D POLLARA, F GP IEEE TI Turbo codes for PCS applications SO ICC '95 - 1995 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CONFERENCE RECORD, VOLS 1-3: COMMUNICATIONS - GATEWAY TO GLOBALIZATION LA English DT Proceedings Paper CT 1995 IEEE International Conference on Communications - Communications: Gateway to Globalization CY JUN 18-22, 1995 CL SEATTLE, WA SP IEEE, Commun Soc, IEEE, Seattle Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 32 Z9 33 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2487-0 PY 1995 BP 54 EP 59 PG 6 WC Engineering, Aerospace; Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Computer Science; Optics; Telecommunications GA BD72P UT WOS:A1995BD72P00011 ER PT B AU FERIA, Y CHEUNG, KM AF FERIA, Y CHEUNG, KM GP IEEE TI Seamless data-rate change using punctured convolutional codes for time-varying signal-to-noise ratio SO ICC '95 - 1995 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CONFERENCE RECORD, VOLS 1-3: COMMUNICATIONS - GATEWAY TO GLOBALIZATION LA English DT Proceedings Paper CT 1995 IEEE International Conference on Communications - Communications: Gateway to Globalization CY JUN 18-22, 1995 CL SEATTLE, WA SP IEEE, Commun Soc, IEEE, Seattle Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2487-0 PY 1995 BP 342 EP 346 PG 5 WC Engineering, Aerospace; Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Computer Science; Optics; Telecommunications GA BD72P UT WOS:A1995BD72P00064 ER PT B AU SADR, R RAPHAELI, D HINEDI, S AF SADR, R RAPHAELI, D HINEDI, S GP IEEE TI Wideband modem design based on multirate filter banks SO ICC '95 - 1995 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CONFERENCE RECORD, VOLS 1-3: COMMUNICATIONS - GATEWAY TO GLOBALIZATION LA English DT Proceedings Paper CT 1995 IEEE International Conference on Communications - Communications: Gateway to Globalization CY JUN 18-22, 1995 CL SEATTLE, WA SP IEEE, Commun Soc, IEEE, Seattle Sect C1 CALTECH,JET PROPULS LAB,PASADENA,CA 91125. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2487-0 PY 1995 BP 889 EP 893 PG 5 WC Engineering, Aerospace; Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Computer Science; Optics; Telecommunications GA BD72P UT WOS:A1995BD72P00167 ER PT B AU TSOU, HP MILEANT, A LEE, R HINEDI, S AF TSOU, HP MILEANT, A LEE, R HINEDI, S GP IEEE TI The recovery of buffered telemetry data for future low cost space missions SO ICC '95 - 1995 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CONFERENCE RECORD, VOLS 1-3: COMMUNICATIONS - GATEWAY TO GLOBALIZATION LA English DT Proceedings Paper CT 1995 IEEE International Conference on Communications - Communications: Gateway to Globalization CY JUN 18-22, 1995 CL SEATTLE, WA SP IEEE, Commun Soc, IEEE, Seattle Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2487-0 PY 1995 BP 919 EP 923 PG 5 WC Engineering, Aerospace; Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Computer Science; Optics; Telecommunications GA BD72P UT WOS:A1995BD72P00173 ER PT B AU MILLION, S HINEDI, S AF MILLION, S HINEDI, S GP IEEE TI Effects of symbol transition density on the performance of the data transition tracking loop at low signal-to-noise ratios SO ICC '95 - 1995 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CONFERENCE RECORD, VOLS 1-3: COMMUNICATIONS - GATEWAY TO GLOBALIZATION LA English DT Proceedings Paper CT 1995 IEEE International Conference on Communications - Communications: Gateway to Globalization CY JUN 18-22, 1995 CL SEATTLE, WA SP IEEE, Commun Soc, IEEE, Seattle Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2487-0 PY 1995 BP 1036 EP 1040 PG 5 WC Engineering, Aerospace; Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Computer Science; Optics; Telecommunications GA BD72P UT WOS:A1995BD72P00195 ER PT B AU NGUYEN, TM HINEDI, SM MARTIN, WL TSOU, HP AF NGUYEN, TM HINEDI, SM MARTIN, WL TSOU, HP GP IEEE TI Communication system architectures for missions to Mars - A preliminary investigation SO ICC '95 - 1995 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CONFERENCE RECORD, VOLS 1-3: COMMUNICATIONS - GATEWAY TO GLOBALIZATION LA English DT Proceedings Paper CT 1995 IEEE International Conference on Communications - Communications: Gateway to Globalization CY JUN 18-22, 1995 CL SEATTLE, WA SP IEEE, Commun Soc, IEEE, Seattle Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2487-0 PY 1995 BP 1587 EP 1591 PG 5 WC Engineering, Aerospace; Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Computer Science; Optics; Telecommunications GA BD72P UT WOS:A1995BD72P00300 ER PT B AU SHIHABI, M SHAH, B HINEDI, S AF SHIHABI, M SHAH, B HINEDI, S GP IEEE TI Improved carrier tracking of space telemetry signals using cascaded phase locked loops SO ICC '95 - 1995 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CONFERENCE RECORD, VOLS 1-3: COMMUNICATIONS - GATEWAY TO GLOBALIZATION LA English DT Proceedings Paper CT 1995 IEEE International Conference on Communications - Communications: Gateway to Globalization CY JUN 18-22, 1995 CL SEATTLE, WA SP IEEE, Commun Soc, IEEE, Seattle Sect C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2487-0 PY 1995 BP 1880 EP 1885 PG 6 WC Engineering, Aerospace; Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Computer Science; Optics; Telecommunications GA BD72P UT WOS:A1995BD72P00355 ER PT B AU Thompson, AM AF Thompson, AM BE Delmas, RJ TI Photochemical modeling of chemical cycles: Issues related to the interpretation of ice core data SO ICE CORE STUDIES OF GLOBAL BIOGEOCHEMICAL CYCLES SE NATO ADVANCED SCIENCE INSTITUTE SERIES, SERIES I, GLOBAL ENVIRONMENT CHANGE LA English DT Proceedings Paper CT NATO Advanced Research Workshop on Ice Score Studies of Global Biogeochemical Cycles CY MAR 26-31, 1993 CL ANNECY, FRANCE SP NATO, US Natl Sci Fdn, European Sci Fdn DE ice cores; biogeochemical cycles; Last Glacial Maximum; methane; oxidants; photochemical model C1 NASA,GODDARD SPACE FLIGHT CTR,ATMOSPHERES LAB,GREENBELT,MD 20771. RI Thompson, Anne /C-3649-2014 OI Thompson, Anne /0000-0002-7829-0920 NR 0 TC 8 Z9 9 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY BN 3-540-59274-1 J9 NATO ASI SER SER I PY 1995 VL 30 BP 265 EP 297 PG 33 WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences GA BE97D UT WOS:A1995BE97D00015 ER PT B AU SHIRINZADEH, B BALLA, RJ HILLARD, ME AF SHIRINZADEH, B BALLA, RJ HILLARD, ME GP IEEE TI Quantitative density measurements in a Mach 6 flow field using the Rayleigh scattering technique SO ICIASF '95 RECORD - INTERNATIONAL CONGRESS ON INSTRUMENTATION IN AEROSPACE SIMULATION FACILITIES LA English DT Proceedings Paper CT 16th International Congress on Instrumentation in Aerospace Simulation Facilities CY JUL 18-21, 1995 CL USAF, WRIGHT LAB, FLIGHT DYNAM DIRECTORATE, DAYTON, OH SP IEEE, Dayton Sect, IEEE, Aerosp & Electr Syst Soc HO USAF, WRIGHT LAB, FLIGHT DYNAM DIRECTORATE C1 NASA,LANGLEY RES CTR,HAMPTON,VA 23681. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2089-1 PY 1995 BP 109 EP 115 PG 7 WC Engineering, Aerospace SC Engineering GA BE18D UT WOS:A1995BE18D00013 ER PT B AU WERNET, MP SKOCH, GJ WERNET, JH AF WERNET, MP SKOCH, GJ WERNET, JH GP IEEE TI Demonstration of a stabilized alumina/ethanol colloidal dispersion technique for seeding high temperature air flows SO ICIASF '95 RECORD - INTERNATIONAL CONGRESS ON INSTRUMENTATION IN AEROSPACE SIMULATION FACILITIES LA English DT Proceedings Paper CT 16th International Congress on Instrumentation in Aerospace Simulation Facilities CY JUL 18-21, 1995 CL USAF, WRIGHT LAB, FLIGHT DYNAM DIRECTORATE, DAYTON, OH SP IEEE, Dayton Sect, IEEE, Aerosp & Electr Syst Soc HO USAF, WRIGHT LAB, FLIGHT DYNAM DIRECTORATE C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 0 Z9 0 U1 1 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2089-1 PY 1995 BP 165 EP 173 PG 9 WC Engineering, Aerospace SC Engineering GA BE18D UT WOS:A1995BE18D00019 ER PT B AU BOGUE, R MCGANN, R WAGENER, T ABBISS, J SMART, A AF BOGUE, R MCGANN, R WAGENER, T ABBISS, J SMART, A GP IEEE TI Comparative optical measurements of airspeed and aerosols on a DC-8 aircraft SO ICIASF '95 RECORD - INTERNATIONAL CONGRESS ON INSTRUMENTATION IN AEROSPACE SIMULATION FACILITIES LA English DT Proceedings Paper CT 16th International Congress on Instrumentation in Aerospace Simulation Facilities CY JUL 18-21, 1995 CL USAF, WRIGHT LAB, FLIGHT DYNAM DIRECTORATE, DAYTON, OH SP IEEE, Dayton Sect, IEEE, Aerosp & Electr Syst Soc HO USAF, WRIGHT LAB, FLIGHT DYNAM DIRECTORATE C1 NASA,DRYDEN FLIGHT RES CTR,EDWARDS AFB,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2089-1 PY 1995 BP 523 EP 547 PG 25 WC Engineering, Aerospace SC Engineering GA BE18D UT WOS:A1995BE18D00056 ER PT B AU BUEHLER, MG REIER, M SOLI, GA AF BUEHLER, MG REIER, M SOLI, GA GP IEEE TI DEPTH MEASUREMENTS USING ALPHA-PARTICLES AND UPSETTABLE SRAMS SO ICMTS 1995 - PROCEEDINGS OF THE 1995 INTERNATIONAL CONFERENCE ON MICROELECTRONIC TEST STRUCTURES LA English DT Proceedings Paper CT 1995 International Conference on Microelectronic Test Structures (ICMTS 1995) CY MAR 22-25, 1995 CL NARA, JAPAN SP IEEE, Electron Devices Soc, IEICE, Japan Soc Appl Phys C1 JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2065-4 PY 1995 BP 253 EP 257 PG 5 WC Engineering, Electrical & Electronic SC Engineering GA BD13T UT WOS:A1995BD13T00049 ER PT B AU Hammoud, AN Stavnes, MW Ide, JR Muegge, E AF Hammoud, AN Stavnes, MW Ide, JR Muegge, E GP IEEE TI Performance of partially fluorinated polyimide insulation for aerospace applications SO IEEE 1995 ANNUAL REPORT - CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA LA English DT Proceedings Paper CT 1995 Conference on Electrical Insulation and Dielectric Phenomena CY OCT 22-25, 1995 CL VIRGINIA BEACH, VA SP IEEE Dielectr & Elect Insulat Soc C1 NASA,LEWIS RES CTR,NYMA INC,BROOKPARK,OH 44142. NR 0 TC 0 Z9 0 U1 0 U2 2 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2931-7 PY 1995 BP 262 EP 265 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BE55B UT WOS:A1995BE55B00058 ER PT B AU Hammoud, A Stavnes, M Suthar, J Laghari, J AF Hammoud, A Stavnes, M Suthar, J Laghari, J GP IEEE TI Effects of thermal and electrical stressing on the breakdown behavior of space wiring SO IEEE 1995 ANNUAL REPORT - CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA LA English DT Proceedings Paper CT 1995 Conference on Electrical Insulation and Dielectric Phenomena CY OCT 22-25, 1995 CL VIRGINIA BEACH, VA SP IEEE Dielectr & Elect Insulat Soc C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 2 Z9 2 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2931-7 PY 1995 BP 266 EP 269 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BE55B UT WOS:A1995BE55B00059 ER PT B AU Baumann, ED Hammoud, AN AF Baumann, ED Hammoud, AN GP IEEE TI Operational characteristics of a 200 degrees C LC parallel resonant circuit SO IEEE 1995 ANNUAL REPORT - CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA LA English DT Proceedings Paper CT 1995 Conference on Electrical Insulation and Dielectric Phenomena CY OCT 22-25, 1995 CL VIRGINIA BEACH, VA SP IEEE Dielectr & Elect Insulat Soc C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2931-7 PY 1995 BP 270 EP 273 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BE55B UT WOS:A1995BE55B00060 ER PT B AU TUCKER, JH TAPIA, MA AF TUCKER, JH TAPIA, MA GP IEEE TI SOLUTION OF A CLASS OF BOOLEAN EQUATIONS SO IEEE SOUTHEASTCON '95 - VISUALIZE THE FUTURE, PROCEEDINGS LA English DT Proceedings Paper CT IEEE Southeastcon 95 - Visualize the Future CY MAR 26-29, 1995 CL RALEIGH, NC SP IEEE C1 NASA,LANGLEY RES CTR,DIV AEROSP ELECTR SYST,HAMPTON,VA 23681. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2642-3 PY 1995 BP 106 EP 112 PG 7 WC Automation & Control Systems; Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic; Telecommunications SC Automation & Control Systems; Computer Science; Engineering; Telecommunications GA BD04P UT WOS:A1995BD04P00021 ER PT B AU TUCKER, JH STOVER, SK AF TUCKER, JH STOVER, SK GP IEEE TI USING GENETIC ALGORITHMS TO SOLVE BOOLEAN EQUATIONS SO IEEE SOUTHEASTCON '95 - VISUALIZE THE FUTURE, PROCEEDINGS LA English DT Proceedings Paper CT IEEE Southeastcon 95 - Visualize the Future CY MAR 26-29, 1995 CL RALEIGH, NC SP IEEE C1 NASA,LANGLEY RES CTR,HAMPTON,VA 23681. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2642-3 PY 1995 BP 341 EP 344 PG 4 WC Automation & Control Systems; Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic; Telecommunications SC Automation & Control Systems; Computer Science; Engineering; Telecommunications GA BD04P UT WOS:A1995BD04P00067 ER PT J AU STEPHENS, SA THOMAS, JB AF STEPHENS, SA THOMAS, JB TI CONTROLLED-ROOT FORMULATION FOR DIGITAL PHASE-LOCKED LOOPS SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Article AB In a new formulation for digital phase-locked loops, loop-filter constants are determined from loop roots that can each be selectively placed in the s-plane on the basis of a new set of parameters, each with simple and direct physical meaning in terms of loop noise bandwidth, root-specific decay rate, or root-specific damping. Loops of first to fourth order are treated in the continuous-update approximation (BLT --> 0) and in a discrete-update formulation with arbitrary BLT. Deficiencies of the continuous-update approximation in large-BLT applications are avoided in the new discrete-update formulation. A new method for direct, transient-free acquisition with third- and fourth-order loops can improve the versatility and reliability of acquisition with such loops. RP STEPHENS, SA (reprint author), CALTECH,JET PROP LAB,MS 238-600,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 7 TC 62 Z9 71 U1 4 U2 5 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 JAN PY 1995 VL 31 IS 1 BP 78 EP 95 DI 10.1109/7.366295 PG 18 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA QG896 UT WOS:A1995QG89600008 ER PT J AU BARNIV, Y AF BARNIV, Y TI PASSIVE RANGING USING IMAGE EXPANSION SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Article ID OPTICAL-FLOW; MOTION; LOCATION; OBSERVER; PARALLAX; MOVEMENT; FIELD AB This paper describes a new technique for passive ranging which is of special interest in areas such as covert nap-of-the-Earth helicopter flight and spacecraft landing. This technique is based on the expansion experienced by the image-plane projection of an object as its distance from the sensor decreases. The motion and shape of a small window, assumed to fall inside the boundaries of some object, is approximated by an affine transformation. The parameters of the transformation matrix (expansion, rotation and translation) are derived by initially comparing successive images, and progressively increasing the image time separation. This yields a more favorable geometry for triangulation (larger baseline) than is currently possible. Depth is directly derived from the expansion part of the transformation, and its accuracy is proportional to the baseline length. RP BARNIV, Y (reprint author), NASA,AMES RES CTR,MS 210-1,MOFFETT FIELD,CA 94035, USA. NR 30 TC 2 Z9 2 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 0018-9251 J9 IEEE T AERO ELEC SYS JI IEEE Trans. Aerosp. Electron. Syst. PD JAN PY 1995 VL 31 IS 1 BP 358 EP 374 DI 10.1109/7.366317 PG 17 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA QG896 UT WOS:A1995QG89600031 ER PT J AU WU, YW RHODES, S SATORIUS, EH AF WU, YW RHODES, S SATORIUS, EH TI DIRECTION-OF-ARRIVAL ESTIMATION VIA EXTENDED PHASE INTERFEROMETRY SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Article ID MUSIC AB A simple new estimator is proposed for direction finding applications which extends conventional phase-only interferometry to incorporate both calibrated phase and amplitude response. data from antenna arrays. This is done by appropriately weighting the square of the baseline phase differences with the antenna gains. The incorporation of amplitude data generally provides significant performance improvement over phase-only interferometry with only a modest increase in computational complexity. Furthermore, this performance improvement increases with increasing additive noise and with increasing deviation of the antenna array response from an ideal geometric array response. As such, the new estimator strikes a nice compromise between phase only interferometry and maximum likelihood estimation (MLE), this latter yielding nearly-optimal performance but at significant computational expense. Performance results are derived analytically for sufficiently high signal-to-noise ratio (SNR) or sample count, and are also demonstrated using antenna array responses simulated with the Numerical Electromagnetic Code (NEC). The simulation results corroborate the analysis and clearly demonstrate that significant variance reduction in direction of arrival (DOA) estimation error can be achieved with the new estimator. C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. RP WU, YW (reprint author), USA,CECOM,INTELLIGENCE & ELECTR WARFARE DIRECTORATE,WARRENTON,VA, USA. NR 19 TC 10 Z9 17 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 0018-9251 J9 IEEE T AERO ELEC SYS JI IEEE Trans. Aerosp. Electron. Syst. PD JAN PY 1995 VL 31 IS 1 BP 375 EP 381 DI 10.1109/7.366318 PG 7 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA QG896 UT WOS:A1995QG89600032 ER PT J AU HUANG, J AF HUANG, J TI A KA-BAND CIRCULARLY-POLARIZED HIGH-GAIN MICROSTRIP ARRAY ANTENNA SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Note ID ELEMENTS AB In this article, the development of a circularly polarized microstrip array with 28 dBic of gain at 32 GHz is presented. Two primary objectives of this development are minimizing the microstrip array's insertion loss and maintaining a reasonable frequency bandwidth (3%). The parallel/series feed technique for the array's power distribution circuit and the sequential rotation method for the element arrangement are employed to meet these objectives. RP HUANG, J (reprint author), CALTECH,JET PROP LAB,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 15 TC 40 Z9 42 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-926X J9 IEEE T ANTENN PROPAG JI IEEE Trans. Antennas Propag. PD JAN PY 1995 VL 43 IS 1 BP 113 EP 116 DI 10.1109/8.366361 PG 4 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA QF167 UT WOS:A1995QF16700015 ER PT J AU YUEH, SH WILSON, WJ LI, FK NGHIEM, SV RICKETTS, WB AF YUEH, SH WILSON, WJ LI, FK NGHIEM, SV RICKETTS, WB TI POLARIMETRIC MEASUREMENTS OF SEA-SURFACE BRIGHTNESS TEMPERATURES USING AN AIRCRAFT K-BAND RADIOMETER SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING LA English DT Article AB This paper presents the first experimental evidence that the polarimetric brightness temperatures of sea surfaces are sensitive to ocean wind direction in the incidence angle range of 30 to 50 degrees, Our experimental data were collected by a K-band (19.35 GHz) polarimetric wind radiometer (WINDRAD) mounted on the NASA DC-8 aircraft. A set of aircraft radiometer Eights was successfully completed in November 1993, We performed circle flights over National Data Buoy Center (NDBC) moored buoys deployed off the northern California coast, which provided ocean wind measurements, The first WINDRAD flight was made on November 4, 1993, There was clear weather with a wind speed of 12 m/s at 330 degrees around the Pt, Arena buoy, We circled the buoy at three incidence angles, and all data when plotted as functions of azimuth angles show clear modulations of several Kelvin, At 40 degrees incidence angle, there is a 5 Kelvin peak-to-peak signal in the second Stokes parameter Q and the third Stokes parameter Ii, The Q data maximum is in the upwind direction and U has a 45 degrees phase shift in azimuth-as predicted by theory, There is also an up/downwind asymmetry of 2 Kelvin in the Q data, and 1 Kelvin in the U data, At 50 degrees incidence angle, the collected data show very similar wind direction signatures to the SSM/I model function, Additional Eights were made on other days under cloudy conditions, Data taken at a wind speed of 8 m/s show that at 40 degrees incidence Q and U have a smaller azimuthal modulation of 3 Kelvin, probably due to the lower wind speed, Additionally, the simultaneously recorded video images of sea surfaces suggested that Q and U data were less sensitive to unpolarized geophysical variations, such as clouds and whitecaps, while the T-v and T-h increased by a few Kelvin when the radiometer beam crossed over clouds, or there was a sudden increase of whitecaps in the radiometer footprint. The results of our aircraft flights indicate that passive polarimetric radiometry has a strong potential for global ocean wind speed and direction measurements from space, RP YUEH, SH (reprint author), CALTECH,JET PROP LAB,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 11 TC 73 Z9 83 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 0196-2892 J9 IEEE T GEOSCI REMOTE JI IEEE Trans. Geosci. Remote Sensing PD JAN PY 1995 VL 33 IS 1 BP 85 EP 92 DI 10.1109/36.368219 PG 8 WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology GA QD771 UT WOS:A1995QD77100009 ER PT J AU SHIMADA, M FREEMAN, A AF SHIMADA, M FREEMAN, A TI A TECHNIQUE FOR MEASUREMENT OF SPACEBORNE SAR ANTENNA PATTERNS USING DISTRIBUTED TARGETS SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING LA English DT Article ID CALIBRATION AB A method to measure the antenna elevation pattern of Synthetic Aperture Radar (SAR) using distributed targets is introduced in this paper. The features of the method are 1) The antenna pattern model parameters are estimated as the solutions of Maximum Likelihood Estimation; 2) To guarantee the uniformity, a screening process based on a chi-square similarity test is applied to the image data; and 3) Noise generated in the SAR receiver and data processor tends to broaden the estimated antenna pattern, To improve it, the estimated noise level is subtracted from the image data. We assume that the scattering coefficient over the evaluated images is unknown Set constant (although this could easily be extended to the case where the variation of gamma or sigma degrees with incidence angle is known), Three types of antenna pattern models are tested, Among them, the best result is given by a fourth order power model. This technique is applied to selected image data sets from the SIR-B mission, including several scenes analyzed previously by Moore from the Amazon rain forest and Illinois farmland, For the Amazon data (which give the best results), we found that the technique adopted in this paper gives residual errors on the antenna pattern fit of less than 0.08 dB for a given scene, Applying the antenna pattern estimated from one scene to others, residual errors of less than 0.3 dB are achieved. C1 CALTECH,JET PROP LAB,RADAR SCI & ENGN SECT,PASADENA,CA 91109. RP SHIMADA, M (reprint author), NATL SPACE DEV AGCY JAPAN,CTR EARTH OBSERVAT,TOKYO,JAPAN. NR 12 TC 22 Z9 24 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 0196-2892 J9 IEEE T GEOSCI REMOTE JI IEEE Trans. Geosci. Remote Sensing PD JAN PY 1995 VL 33 IS 1 BP 100 EP 114 DI 10.1109/36.368217 PG 15 WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology GA QD771 UT WOS:A1995QD77100011 ER PT J AU RUF, CS KEIHM, SJ JANSSEN, MA AF RUF, CS KEIHM, SJ JANSSEN, MA TI TOPEX/POSEIDON MICROWAVE RADIOMETER (TMR) .1. INSTRUMENT DESCRIPTION AND ANTENNA TEMPERATURE CALIBRATION SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING LA English DT Article ID TROPOSPHERIC RANGE CORRECTION; SMMR; PERFORMANCE AB The TOPEX/Poseidon Microwave Radiometer (TMR) is a three-frequency radiometer flown on the TOPEX/Poseidon (T/P) satellite in low Earth orbit, It operates at 18, 21, and 37 GHz in a nadir-only viewing direction which Is co-aligned with the TIP radar altimeters, TMR monitors and corrects for the propagation path delay of the altimeter radar signal due to water vapor and nonprecipitating liquid water in the atmosphere, This paper describes the TMR instrument and the radiometric instrument calibration required to derive antenna temperature (T-A) from the raw digital data, T-A precision of 0.4 degrees K is predicted on orbit in ah expected thermal environments, T-A accuracy of 0.5-0.6 degrees K is expected following a post-launch field calibration campaign, These performance figures represent a significant improvement over those of the Seasat and Nimbus-G Scanning Multichannel Microwave Radiometer on which TMR is based, The improvements are the result of specific hardware design and calibration changes, Hardware changes include a redesigned feed horn, to reduce impedance mismatches, and the addition of radomes over the feed and sky horns, to reduce thermal variations. Calibration changes involve more extensive temperature cycling and data analysis during thermal/vacuum testing. C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. BALL CORP,IRVINE,CA. RP RUF, CS (reprint author), PENN STATE UNIV,DEPT ELECT ENGN,UNIVERSITY PK,PA 16802, USA. RI Ruf, Christopher/I-9463-2012 NR 22 TC 62 Z9 67 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 0196-2892 J9 IEEE T GEOSCI REMOTE JI IEEE Trans. Geosci. Remote Sensing PD JAN PY 1995 VL 33 IS 1 BP 125 EP 137 DI 10.1109/36.368215 PG 13 WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology GA QD771 UT WOS:A1995QD77100013 ER PT J AU JANSSEN, MA RUF, CS KEIHM, SJ AF JANSSEN, MA RUF, CS KEIHM, SJ TI TOPEX/POSEIDON MICROWAVE RADIOMETER (TMR) .2. ANTENNA PATTERN CORRECTION AND BRIGHTNESS TEMPERATURE ALGORITHM SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING LA English DT Article ID SMMR AB The calibrated antenna temperatures measured by the TOPEX Microwave Radiometer are used to derive radiometric brightness temperatures in the vicinity of the altimeter footprint, The basis for the procedure devised to do this-the antenna pattern correction and brightness temperature algorithm-is described in this paper, along with its associated uncertainties, The algorithm is based on knowledge of the antenna pattern, the ground-based measurements of which are presented along with their analyses, Using the results of these measurements, we perform an error analysis that yields the net uncertainties in the derived Th IR footprint brightness temperatures, The net brightness temperature uncertainties range from 0.79 to 0.88 degrees K for the three TMR frequencies, and include the radiometer calibration uncertainties which range from 0.54 to 0.57 degrees K, We also derive an estimate of the uncertainty incurred by using brightness temperatures measured in the similar to 40 km TMR footprint to estimate path delay in the similar to 3 km altimeter footprint. The RR IS difference in path delay averaged over the largest TMR footprint relative to that in the altimeter footprint is estimated to be about 0.3 cm, Finally, we discuss the error associated with using unequal beams at the three TMR frequencies to derive path delays, and describe an approach using along-track averaging of the algorithm brightness temperatures to reduce this error, C1 PENN STATE UNIV,DEPT ELECT ENGN,UNIVERSITY PK,PA 16802. RP JANSSEN, MA (reprint author), CALTECH,JET PROP LAB,4800 OAK GROVE DR,PASADENA,CA 91109, USA. RI Ruf, Christopher/I-9463-2012 NR 11 TC 30 Z9 30 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 0196-2892 J9 IEEE T GEOSCI REMOTE JI IEEE Trans. Geosci. Remote Sensing PD JAN PY 1995 VL 33 IS 1 BP 138 EP 146 DI 10.1109/36.368214 PG 9 WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology GA QD771 UT WOS:A1995QD77100014 ER PT J AU KEIHM, SJ JANSSEN, MA RUF, CS AF KEIHM, SJ JANSSEN, MA RUF, CS TI TOPEX/POSEIDON MICROWAVE RADIOMETER (TMR) .3. WET TROPOSPHERE RANGE CORRECTION ALGORITHM AND PRE-LAUNCH ERROR BUDGET SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING LA English DT Article ID BRIGHTNESS TEMPERATURES; ATMOSPHERIC EMISSION; OCEANS SURFACE; LIQUID WATER; WIND-SPEED; SATELLITE; SEA; PARAMETERS; RAINFALL; IMAGER AB The sole mission function of the TOPEX/Poseidon Microwave Radiometer (TMR) is to provide corrections for the altimeter range errors induced by the highly variable atmospheric water vapor content. The three TMR frequencies are shown to be near-optimum for measuring the vapor-induced path delay within an environment of variable cloud cover and variable sea surface flux background, After a review of the underlying physics relevant to the prediction of 5-40 GHz nadir-viewing microwave brightness temperatures, we describe the development of the statistical, two-step algorithm used for the TMR retrieval of path delay, Test simulations are presented which demonstrate the uniformity of algorithm performance over a range of cloud liquid and sea surface wind speed conditions, The results indicate that the inherent algorithm error (assuming noise free measurements and an exact physical model) is less than 0.4 cm of retrieved path delay for a global representation of atmospheric conditions. An algorithm error budget is developed which predicts an overall algorithm accuracy of 0.9 cm when modeling uncertainties are included. When combined with expected TMR antenna and brightness temperature accuracies, an overall measurement accuracy of 1.2 cm for the wet troposphere range correction is predicted. C1 PENN STATE UNIV,DEPT ELECT ENGN,UNIVERSITY PK,PA 16802. RP KEIHM, SJ (reprint author), CALTECH,JET PROP LAB,4800 OAK GROVE DR,PASADENA,CA 91109, USA. RI Ruf, Christopher/I-9463-2012 NR 69 TC 67 Z9 70 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 0196-2892 J9 IEEE T GEOSCI REMOTE JI IEEE Trans. Geosci. Remote Sensing PD JAN PY 1995 VL 33 IS 1 BP 147 EP 161 DI 10.1109/36.368213 PG 15 WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology GA QD771 UT WOS:A1995QD77100015 ER PT J AU COSTINER, S MANOLACHE, F TAASAN, S AF COSTINER, S MANOLACHE, F TAASAN, S TI MULTILEVEL METHODS APPLIED TO THE DESIGN OF RESONANT CAVITIES SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES LA English DT Article AB An application of multilevel (ML) methods to compute the modes and eigenvalues of resonant cavities is presented, The involved methods include an ML eigenvalue solver, an ML mode separation technique, a boundary treatment method, and a subspace continuation technique (SCT) for sequences of problems. In the presented numerical experiments, an asymptotic convergence factor of order 0.1 is obtained for ML cycles on all fine levels, while performing only a few relaxations per cycle. This factor is obtained for a rectangular cavity as well as for cavities having reentrant corners, holes and narrow regions, and presenting clusters of close and equal eigenvalues. A second order scheme is obtained for the computed eigenvalues and modes with an amount of work of order O(qN) for q modes of size N on the finest level, The SCT is illustrated on a moving boundary problem, where solutions change fast at a small boundary change, Such computations are applied to the design of new microwave selective devices. C1 NASA,LANGLEY RES CTR,ICASE,HAMPTON,VA 23681. UNIV ALEXANDRU IOAN CUZA,FAC FIZ,R-6600 IASI,ROMANIA. WEIZMANN INST SCI,DEPT PHYS,IL-76100 REHOVOT,ISRAEL. RP COSTINER, S (reprint author), WEIZMANN INST SCI,DEPT APPL MATH & COMP SCI,IL-76100 REHOVOT,ISRAEL. RI Cuza, UAIC/D-2604-2009 NR 13 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 0018-9480 J9 IEEE T MICROW THEORY JI IEEE Trans. Microw. Theory Tech. PD JAN PY 1995 VL 43 IS 1 BP 48 EP 55 DI 10.1109/22.363008 PG 8 WC Engineering, Electrical & Electronic SC Engineering GA QB374 UT WOS:A1995QB37400008 ER PT J AU YBARRA, GA WU, SKM BILBRO, GL ARDALAN, SH HEARN, CP NEECE, RT AF YBARRA, GA WU, SKM BILBRO, GL ARDALAN, SH HEARN, CP NEECE, RT TI OPTIMAL SIGNAL-PROCESSING OF FREQUENCY-STEPPED CW-RADAR DATA SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES LA English DT Article AB An optimal signal processing algorithm is derived for estimating the time delay and amplitude of each scatterer reflection using a frequency-stepped CW system, The channel is assumed to be composed of abrupt changes in the reflection coefficient profile, The optimization technique is intended to maximize the target range resolution achievable from any set of frequency-stepped CW radar measurements made in such an environment. The algorithm is composed of an iterative two-step procedure, First, the amplitudes of the echoes are optimized by solving an overdetermined least squares set of equations. Then, a nonlinear objective function is scanned in an organized fashion to find its global minimum, The result is a set of echo strengths and time delay estimates, Although this paper addresses the specific problem of resolving the time delay between the first two echoes, the derivation is general in the number of echoes. Performance of the optimization approach is illustrated using measured data obtained from an RP-8510 network analyzer, It is demonstrated that the optimization approach offers a significant resolution enhancement over the standard processing approach that employs an IFFT. Degradation in the performance of the algorithm due to suboptimal model order selection and the effects of additive white Gaussion noise are addressed. C1 N CAROLINA STATE UNIV,DEPT ELECT & COMP ENGN,RALEIGH,NC 27695. XCAD CORP,CARY,NC 27511. NASA,LANGLEY RES CTR,HAMPTON,VA 23665. RP YBARRA, GA (reprint author), DUKE UNIV,DEPT ELECT ENGN,DURHAM,NC 27708, USA. NR 36 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 0018-9480 J9 IEEE T MICROW THEORY JI IEEE Trans. Microw. Theory Tech. PD JAN PY 1995 VL 43 IS 1 BP 94 EP 105 DI 10.1109/22.363002 PG 12 WC Engineering, Electrical & Electronic SC Engineering GA QB374 UT WOS:A1995QB37400014 ER PT J AU BALDI, P AF BALDI, P TI GRADIENT DESCENT LEARNING ALGORITHM OVERVIEW - A GENERAL DYNAMICAL-SYSTEMS PERSPECTIVE SO IEEE TRANSACTIONS ON NEURAL NETWORKS LA English DT Article ID NEURAL NETWORKS; MODEL AB We give a unified treatment of gradient descent learning algorithms for neural networks using a general framework of dynamical systems, This general approach organizes and simplifies all the known algorithms and results which have been originally derived for different problems (fixed point/trajectory learning), for different model (discrete/continuous), for different architectures (forward/recurrent), and using different techniques (backpropagation, variational calculus, adjoint methods, etc.). The general approach can also be applied to derive new algorithms. We then briefly examine some of the complexity issues and limitations intrinsic to gradient descent learning. Throughout the paper, we focus on the problem of trajectory learning. C1 CALTECH,DIV BIOL,PASADENA,CA 91109. RP BALDI, P (reprint author), CALTECH,JET PROP LAB,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 34 TC 74 Z9 77 U1 1 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1045-9227 J9 IEEE T NEURAL NETWOR JI IEEE Trans. Neural Netw. PD JAN PY 1995 VL 6 IS 1 BP 182 EP 195 DI 10.1109/72.363438 PG 14 WC Computer Science, Artificial Intelligence; Computer Science, Hardware & Architecture; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA QA721 UT WOS:A1995QA72100018 PM 18263297 ER PT B AU YUEH, SH TSAI, WY HUDDLESTON, JN LOU, SH HOUSHMAND, B AF YUEH, SH TSAI, WY HUDDLESTON, JN LOU, SH HOUSHMAND, B BE Stein, TI TI Atmospheric attenuation correction and ice flag algorithms for NSCAT SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 74 EP 76 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00020 ER PT B AU DRINKWATER, MR FISCHER, H KREYSCHER, M HARDER, M AF DRINKWATER, MR FISCHER, H KREYSCHER, M HARDER, M BE Stein, TI TI Comparison of seasonal sea-ice model results with satellite microwave data in the Weddell Sea SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. OI Drinkwater, Mark/0000-0002-9250-3806 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 357 EP 359 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00103 ER PT B AU ONEILL, PE PETRELLA, JJ HSU, AY AF ONEILL, PE PETRELLA, JJ HSU, AY BE Stein, TI TI Comparison of multifrequency truck radar and SIR-C backscatter for soil moisture estimation in Washita '94 SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,HYDROSPHERE PROC LAB,HYDROL SCI BRANCH 974,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 368 EP 370 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00106 ER PT B AU FREEMAN, A CRANDALL, K TRIMBLE, J OLEARY, E ERICKSON, K AF FREEMAN, A CRANDALL, K TRIMBLE, J OLEARY, E ERICKSON, K BE Stein, TI TI The second SIR-C education CD-ROM SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 394 EP 396 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00113 ER PT B AU DRINKWATER, MR LONG, D EARLY, D AF DRINKWATER, MR LONG, D EARLY, D BE Stein, TI TI Comparison of variations in sea-ice formation in the Weddell Sea with seasonal bottom-water outflow data SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. OI Long, David/0000-0002-1852-3972; Drinkwater, Mark/0000-0002-9250-3806 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 402 EP 404 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00115 ER PT B AU HOLT, B MARTIN, S AF HOLT, B MARTIN, S BE Stein, TI TI Spatial and temporal observations of summer ice melt using ERS-1 SAR imagery SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 405 EP 406 PG 2 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00116 ER PT B AU COMISO, JC AF COMISO, JC BE Stein, TI TI Unsupervised classification of Arctic sea ice using neural network SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,HYDOSPHER PROC LAB,GREENBELT,MD 20720. NR 0 TC 1 Z9 1 U1 0 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 414 EP 418 PG 5 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00119 ER PT B AU ENGMAN, ET AF ENGMAN, ET BE Stein, TI TI Microwave remote sensing of soil moisture, progress, potential and problems SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,HYDROSPHER PROC LAB,HYDROL SCI BRANCH 974,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 489 EP 491 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00138 ER PT B AU JACKSON, TJ ONEILL, PE KUSTAS, WP BENNETT, E SWIFT, CT AF JACKSON, TJ ONEILL, PE KUSTAS, WP BENNETT, E SWIFT, CT BE Stein, TI TI Passive microwave observation of diurnal soil moisture at 1.4 and 2.65 GHz SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,HYDROL SCI BRANCH,HYDROSPHER PROC LAB,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 492 EP 494 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00139 ER PT B AU DUBOIS, PC VANZYL, J ENGMAN, T AF DUBOIS, PC VANZYL, J ENGMAN, T BE Stein, TI TI Measuring soil moisture with active microwave: Effect of vegetation SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. RI Dubois-Fernandez, Pascale/A-6743-2012 NR 0 TC 0 Z9 0 U1 0 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 495 EP 497 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00140 ER PT B AU ONEILL, PE HSU, AY SHI, JC AF ONEILL, PE HSU, AY SHI, JC BE Stein, TI TI Soil moisture estimation using time-series radar measurements of bare and vegetated fields in Washita '92 SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,HYDROL SCI BRANCH 974,HYDROSPHER PROC LAB,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 498 EP 500 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00141 ER PT B AU SMITH, JA BALICK, LK SCOGGINS, RK AF SMITH, JA BALICK, LK SCOGGINS, RK BE Stein, TI TI A coupled canopy - Soil thermal emission model for forests SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 533 EP 533 PG 1 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00151 ER PT B AU PINE, MA OSTENDORF, LA AF PINE, MA OSTENDORF, LA BE Stein, TI TI Influencing earth system science education: NASA's approach SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA HEADQUARTERS,OFF MISSION PLANET EARTH CODE YM,WASHINGTON,DC 20546. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 567 EP 569 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00161 ER PT B AU SOFFEN, GA AF SOFFEN, GA BE Stein, TI TI MAPS-NET: Educational meteorology SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 570 EP 571 PG 2 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00162 ER PT B AU WAY, JB STORK, EJ RIDE, S AF WAY, JB STORK, EJ RIDE, S BE Stein, TI TI KidSat SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 578 EP 580 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00165 ER PT B AU HOLECZ, F FREEMAN, A VANZYL, J AF HOLECZ, F FREEMAN, A VANZYL, J BE Stein, TI TI Topographic effects on the antenna gain pattern correction SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int DE SYNTHETIC APERTURE RADAR (SAR); DIGITAL ELEVATION MODEL (DEM); ANTENNA GAIN PATTERN (AGP); GEOMETRIC; RADIOMETRIC AND POLARIMETRIC CALIBRATION C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 1 Z9 1 U1 0 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 587 EP 589 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00167 ER PT B AU LEVINE, DM KARAM, MA AF LEVINE, DM KARAM, MA BE Stein, TI TI Dependence of attenuation in a vegetation canopy on frequency and plant water content SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 607 EP 609 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00173 ER PT B AU VANZYL, JJ AF VANZYL, JJ BE Stein, TI TI On the use of dual polarized interferometry to measure scattering from vegetated areas SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 610 EP 610 PG 1 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00174 ER PT B AU HOLECZ, F WEGMULLER, U RIGNOT, E WANG, Y AF HOLECZ, F WEGMULLER, U RIGNOT, E WANG, Y BE Stein, TI TI Observed radar backscatter from forested areas with terrain variations SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int DE AIRSAR; SAR DATA CALIBRATION; BACKSCATTERING COEFFICIENT; FOREST; BIOMASS ESTIMATION; EFFECTS OF LOCAL SLOPE C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. RI Rignot, Eric/A-4560-2014 OI Rignot, Eric/0000-0002-3366-0481 NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 613 EP 615 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00177 ER PT B AU MIDDLETON, EM WALTERSHEA, EA AF MIDDLETON, EM WALTERSHEA, EA BE Stein, TI TI Optical properties of canopy elements in the boreal forest SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int DE OPTICAL PROPERTIES; SPECTER; REFLECTANCE; TRANSMITTANCE; BOREAS; CONIFERS; ASPEN C1 NASA,GODDARD SPACE FLIGHT CTR,TERR PHYS LAB,GREENBELT,MD 20771. NR 0 TC 5 Z9 5 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 789 EP 793 PG 5 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00228 ER PT B AU MARKHAM, BL HALTHORE, RN HOLBEN, BN AF MARKHAM, BL HALTHORE, RN HOLBEN, BN BE Stein, TI TI Aerosol optical properties over North Central Canada during BOREAS SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,BIOSPHER SCI BRANCH,GREENBELT,MD 20771. RI Markham, Brian/M-4842-2013 OI Markham, Brian/0000-0002-9612-8169 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 797 EP 799 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00230 ER PT B AU RANSON, KJ SUN, GQ AF RANSON, KJ SUN, GQ BE Stein, TI TI Dependence of radar backscattering on northern forest structure observed from AIRSAR and SIR-C/XSAR SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,BIOSPHER SCI BRANCH,GREENBELT,MD 20771. RI Ranson, Kenneth/G-2446-2012 OI Ranson, Kenneth/0000-0003-3806-7270 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 803 EP 805 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00232 ER PT B AU RACETTE, P WANG, J EVANS, P SAUNDERS, R GASIEWSKI, A JACKSON, D AF RACETTE, P WANG, J EVANS, P SAUNDERS, R GASIEWSKI, A JACKSON, D BE Stein, TI TI A calibration experiment using the millimeter-wave imaging radiometer at the UK Meteorological Office Calibration Facility SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,MICROWAVE SENSORS BRANCH 975,GREENBELT,MD 20771. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 809 EP 811 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00233 ER PT B AU SPENCER, MW TSAI, WY NEUMANN, G AF SPENCER, MW TSAI, WY NEUMANN, G BE Stein, TI TI NASA scatterometer (NSCAT) pre-launch calibration results and post-launch calibration plan SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 821 EP 823 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00237 ER PT B AU BLIVEN, L ELFOUHAILY, T AF BLIVEN, L ELFOUHAILY, T BE Stein, TI TI Rain-sea interaction facility description SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,HYDROSPHER PROC LAB,WALLOPS ISL,VA 23337. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 827 EP 828 PG 2 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00238 ER PT B AU BLIVEN, L GIOVANANGELI, JP BRANGER, H SOBIESKI, P ELFOUHAILY, T AF BLIVEN, L GIOVANANGELI, JP BRANGER, H SOBIESKI, P ELFOUHAILY, T BE Stein, TI TI Heavy rain effects on scatterometer returns from rain roughened seas SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,HYDROSPHER PROC LAB,WALLOPS ISL,VA 23337. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 829 EP 829 PG 1 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00239 ER PT B AU BLIVEN, L SOBIESKI, P ELFOUHAILY, T AF BLIVEN, L SOBIESKI, P ELFOUHAILY, T BE Stein, TI TI Ring wave frequency spectra: Measurements and model SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,HYDROSPHER PROC LAB,WALLOPS ISL,VA 23337. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 830 EP 830 PG 1 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00240 ER PT B AU CAVALIERI, DJ CHANG, ATC AF CAVALIERI, DJ CHANG, ATC BE Stein, TI TI Microwave methods for discriminating among sea ice, surface winds, and atmospheric parameters in the arctic SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,HYDROSPHER PROC LAB,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 845 EP 847 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00245 ER PT B AU FREEMAN, A VANDENBROEK, B AF FREEMAN, A VANDENBROEK, B BE Stein, TI TI Mapping vegetation types using SIR-C data SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 921 EP 923 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00267 ER PT B AU HALL, FG PEDDLE, DR LEDREW, EF AF HALL, FG PEDDLE, DR LEDREW, EF BE Stein, TI TI Remote sensing of biophysical variables in boreal stands of Picea mariana SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 976 EP 977 PG 2 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00283 ER PT B AU RANSON, KJ SUN, GQ WEISHAMPEL, JF KNOX, RG AF RANSON, KJ SUN, GQ WEISHAMPEL, JF KNOX, RG BE Stein, TI TI An evaluation of AIRSAR and SIR-C/XSAR images for northern forest ecological studies in Maine, USA SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,BIOSPHER SCI BRANCH,GREENBELT,MD 20771. RI Knox, Robert/E-9657-2011; Ranson, Kenneth/G-2446-2012 OI Ranson, Kenneth/0000-0003-3806-7270 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 994 EP 996 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00288 ER PT B AU ZIMMERMANN, R MCDONALD, K OREN, R WAY, J AF ZIMMERMANN, R MCDONALD, K OREN, R WAY, J BE Stein, TI TI Xylem dielectric constant, water status, and transpiration of young Jack Pine (Pinus banksiana Lamb) in the southern boreal zone of Canada SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,TERR SCI GRP 3235,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1006 EP 1008 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00292 ER PT B AU LEMOIGNE, J AF LEMOIGNE, J BE Stein, TI TI Towards a parallel registration of multiple resolution remote sensing data SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,CTR EXCELLENCE SPACE DATA & INFORMAT SCI,USRA,GREENBELT,MD 20771. NR 0 TC 5 Z9 5 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1011 EP 1013 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00293 ER PT B AU WU, STS AF WU, STS BE Stein, TI TI The multifrequency brightness temperature measurements of emission, absorption, and scattering by the tropical atmosphere over the surface of tropical ocean SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,CTR GLOBAL HYDROL & CLIMATE,HUNTSVILLE,AL 35806. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1141 EP 1141 PG 1 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00335 ER PT B AU MCDONALD, KC ZIMMERMANN, R OREN, R WAY, JB AF MCDONALD, KC ZIMMERMANN, R OREN, R WAY, JB BE Stein, TI TI Dielectric and hydraulic response of selected forest canopies at the BOREAS test sites in Canada SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1204 EP 1206 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00354 ER PT B AU DEERING, DW AHMAD, SP ECK, TF BANERJEE, BP AF DEERING, DW AHMAD, SP ECK, TF BANERJEE, BP BE Stein, TI TI Temporal attributes of the bidirectional reflectance for three boreal forest canopies SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,BIOSPHER SCI BRANCH,GREENBELT,MD 20771. RI ECK, THOMAS/D-7407-2012 NR 0 TC 10 Z9 10 U1 0 U2 2 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1239 EP 1241 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00365 ER PT B AU MANGO, SA CHUBB, SR ASKARI, F LEE, JS VALENZUELA, GR JANSEN, RW FUSINA, RA HOLT, B GOLDSTEIN, RM ALPERS, W DONATO, TF GRUNES, MR SHIH, HH VERDI, J CHURCH, JC SHAY, LK AF MANGO, SA CHUBB, SR ASKARI, F LEE, JS VALENZUELA, GR JANSEN, RW FUSINA, RA HOLT, B GOLDSTEIN, RM ALPERS, W DONATO, TF GRUNES, MR SHIH, HH VERDI, J CHURCH, JC SHAY, LK BE Stein, TI TI Remote sensing of current-wave interactions with SIR-C/X-SAR during SRL-1 and SRL-2 at the Gulf Stream Supersite SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1325 EP 1327 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00390 ER PT B AU WHITEMAN, D MELFI, SH FERRARE, R EVANS, K AF WHITEMAN, D MELFI, SH FERRARE, R EVANS, K BE Stein, TI TI Scanning Raman lidar to measure atmospheric water vapor and aerosols SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1389 EP 1391 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00409 ER PT B AU WANG, JR RACETTE, P CHANG, LA FALCONE, V GRIFFIN, M PICKLE, J MOORE, SL AF WANG, JR RACETTE, P CHANG, LA FALCONE, V GRIFFIN, M PICKLE, J MOORE, SL BE Stein, TI TI Profiling of atmospheric water vapor with MIR and SSM/T-2 measurements SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1398 EP 1400 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00412 ER PT B AU GANAPOL, B JOHNSON, L HAMMER, P HLAVKA, C PETERSON, D AF GANAPOL, B JOHNSON, L HAMMER, P HLAVKA, C PETERSON, D BE Stein, TI TI A new within-leaf radiative transfer model: Preliminary results SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,AMES RES CTR,ECOSYST SCI & TECHNOL BRANCH,MOFFETT FIELD,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1457 EP 1459 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00430 ER PT B AU GRAF, JE NADERI, F TSAI, WY AF GRAF, JE NADERI, F TSAI, WY BE Stein, TI TI Overview of NASA scatterometers projects SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 2 Z9 2 U1 1 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1564 EP 1566 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00461 ER PT B AU IRONS, JR WILLIAMS, DL MARKHAM, BL AF IRONS, JR WILLIAMS, DL MARKHAM, BL BE Stein, TI TI Landsat 7 ETM+ on-orbit calibration and data quality assessment SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,BIOSPHER SCI BRANCH,GREENBELT,MD 20771. RI Irons, James/D-8535-2012; Markham, Brian/M-4842-2013 OI Markham, Brian/0000-0002-9612-8169 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1573 EP 1575 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00464 ER PT B AU FREEMAN, A CRUZ, J CHAPMAN, B ALVES, M TURNER, E SHAFFER, S AF FREEMAN, A CRUZ, J CHAPMAN, B ALVES, M TURNER, E SHAFFER, S BE Stein, TI TI Calibration of SIR-C data products SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 1 U1 0 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1585 EP 1587 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00467 ER PT B AU WANG, JR RACETTE, P ZHAN, J BONCYK, WC AF WANG, JR RACETTE, P ZHAN, J BONCYK, WC BE Stein, TI TI Rain-associated microwave radiometric signatures in the frequency range of 90-220 GHz SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1651 EP 1653 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00486 ER PT B AU MIDDLETON, EM CHAPPELLE, EW DELUCA, A AF MIDDLETON, EM CHAPPELLE, EW DELUCA, A BE Stein, TI TI Evaluating photosynthesis in boreal forest species with fluorescence measurements SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,TERR PHYS LAB,GREENBELT,MD 20771. NR 0 TC 3 Z9 3 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1723 EP 1725 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00508 ER PT B AU DINER, DJ ABDOU, WA BRUEGGE, CJ CONEL, JE KAHN, RA MARTONCHIK, JV PARADISE, SR WEST, RA AF DINER, DJ ABDOU, WA BRUEGGE, CJ CONEL, JE KAHN, RA MARTONCHIK, JV PARADISE, SR WEST, RA BE Stein, TI TI Status of the Multi-angle Imaging SpectroRadiometer instrument for EOS-AM1 and its application to remote sensing of aerosols SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1855 EP 1857 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00549 ER PT B AU WANG, JR ONEILL, PE ENGMAN, ET PARDIPURAM, R SHI, JC HSU, AY AF WANG, JR ONEILL, PE ENGMAN, ET PARDIPURAM, R SHI, JC HSU, AY BE Stein, TI TI Estimating surface soil moisture from SIR-C measurements over the little Washita watershed SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 1982 EP 1984 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00586 ER PT B AU HERMAN, NH JORDAN, RL CARO, ER AF HERMAN, NH JORDAN, RL CARO, ER BE Stein, TI TI SIR-C flight hardware: Design objectives, actual performance and suggestions for future applications SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 2047 EP 2050 PG 4 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00605 ER PT B AU LOSEEN, D CHEHBOUNI, A NJOKU, E SAATCHI, S AF LOSEEN, D CHEHBOUNI, A NJOKU, E SAATCHI, S BE Stein, TI TI A modeling study on the use of passive microwave data for the monitoring of sparsely vegetated land surfaces SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. RI Lo Seen, Danny/C-2679-2008 OI Lo Seen, Danny/0000-0002-7773-2109 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 2218 EP 2220 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00653 ER PT B AU VANZYL, JJ ZEBKER, HA HENSLEY, S HAUB, D WIESBECK, W AF VANZYL, JJ ZEBKER, HA HENSLEY, S HAUB, D WIESBECK, W BE Stein, TI TI The new dual frequency (C- and L-band) Topsar airborne interferometric SAR SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 2270 EP 2272 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00669 ER PT B AU CHENG, T LEUNG, K JIN, M CHU, E AF CHENG, T LEUNG, K JIN, M CHU, E BE Stein, TI TI Scansar and precision processor implementation at the Alaska sar facility SO IGARSS '95 - 1995 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-3: QUANTITATIVE REMOTE SENSING FOR SCIENCE AND APPLICATIONS LA English DT Proceedings Paper CT 1995 International Geoscience and Remote Sensing Symposium (IGARSS 95) CY JUL 10-14, 1995 CL FLORENCE, ITALY SP IEEE, Geosci & Remote Sensing Soc, Union Radiosci Int C1 CALTECH,JET PROP LAB,PASADENA,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2568-0 J9 INT GEOSCI REMOTE SE PY 1995 BP 2302 EP 2306 PG 5 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BD72Q UT WOS:A1995BD72Q00679 ER PT S AU Nayak, PP Levy, AY AF Nayak, PP Levy, AY BE Mellish, CS TI A semantic theory of abstractions SO IJCAI-95 - PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL JOINT CONFERENCE ON ARTIFICIAL INTELLIGENCE, VOLS 1 AND 2 SE INTERNATIONAL JOINT CONFERENCE ON ARTIFICIAL INTELLIGENCE LA English DT Proceedings Paper CT 14th International Joint Conference on Artificial Intelligence (IJCAI-95) CY AUG 20-25, 1995 CL MONTREAL, CANADA SP Int Joint Conf Artificial Intelligence Inc, Amer Assoc Artificial Intelligence, Canadian Soc Comp Studies Intelligence, Soc Canadienne Etude Intelligence Ordinateur C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. NR 0 TC 0 Z9 0 U1 0 U2 3 PU MORGAN KAUFMANN PUB INC PI SAN MATEO PA 2929 CAMPUS DRIVE, SAN MATEO, CA 94403 SN 1045-0823 BN 1-55860-363-8 J9 INT JOINT CONF ARTIF PY 1995 BP 196 EP 202 PG 7 WC Computer Science, Artificial Intelligence SC Computer Science GA BE63Q UT WOS:A1995BE63Q00026 ER PT B AU FAYYAD, UM SMYTH, P AF FAYYAD, UM SMYTH, P BE Costianes, PJ TI IMAGE RETRIEVAL BY CONTENT - A MACHINE LEARNING APPROACH SO IMAGE AND INFORMATION SYSTEMS: APPLICATIONS AND OPPORTUNITIES: 23RD AIPR WORKSHOP SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 23rd AIPR Workshop on Image and Information Systems - Applications and Opportunities CY OCT 12-14, 1994 CL WASHINGTON, DC SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AIPR EXECUT COMM DE MACHINE LEARNING; PATTERN RECOGNITION; AUTOMATED DATA ANALYSIS AND ARCHIVAL; LARGE IMAGE DATABASES; QUERY BY CONTENT C1 JET PROP LAB,PASADENA,CA 91109. 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 0-8194-1710-6 J9 P SOC PHOTO-OPT INS PY 1995 VL 2368 BP 13 EP 24 DI 10.1117/12.200794 PG 12 WC Computer Science, Artificial Intelligence; Optics SC Computer Science; Optics GA BC33L UT WOS:A1995BC33L00002 ER PT B AU Zhang, SN Harmon, BA Fishman, GJ Paciesas, WS AF Zhang, SN Harmon, BA Fishman, GJ Paciesas, WS BE Bassani, L diCocco, G TI Hard X-ray all-sky imaging with BATSE/CGRO - The Earth occultation transform imaging SO IMAGING IN HIGH ENERGY ASTRONOMY LA English DT Proceedings Paper CT International Workshop on Imaging in High Energy Astronomy CY SEP 26-30, 1994 CL ANACAPRI, ITALY SP CNR, Leben, CREASO DE gamma-rays, imaging; Earth occultation; Radon transform; Maximum Entropy C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. NR 0 TC 8 Z9 8 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3788-3 PY 1995 BP 57 EP 62 DI 10.1007/BF00419258 PG 6 WC Astronomy & Astrophysics; Remote Sensing SC Astronomy & Astrophysics; Remote Sensing GA BF13P UT WOS:A1995BF13P00007 ER PT B AU Ramsey, BD AF Ramsey, BD BE Bassani, L diCocco, G TI Imaging gas counters for x- and gamma ray astronomy SO IMAGING IN HIGH ENERGY ASTRONOMY LA English DT Proceedings Paper CT International Workshop on Imaging in High Energy Astronomy CY SEP 26-30, 1994 CL ANACAPRI, ITALY SP CNR, Leben, CREASO DE x-rays; imaging; gas-filled detectors; proportional counters C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. NR 0 TC 2 Z9 2 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3788-3 PY 1995 BP 119 EP 127 DI 10.1007/BF00419266 PG 9 WC Astronomy & Astrophysics; Remote Sensing SC Astronomy & Astrophysics; Remote Sensing GA BF13P UT WOS:A1995BF13P00015 ER PT B AU Gehrels, N AF Gehrels, N BE Bassani, L diCocco, G TI Hard x-ray and gamma-ray imaging with solid state detectors SO IMAGING IN HIGH ENERGY ASTRONOMY LA English DT Proceedings Paper CT International Workshop on Imaging in High Energy Astronomy CY SEP 26-30, 1994 CL ANACAPRI, ITALY SP CNR, Leben, CREASO C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RI Gehrels, Neil/D-2971-2012 NR 0 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3788-3 PY 1995 BP 129 EP 135 DI 10.1007/BF00419267 PG 7 WC Astronomy & Astrophysics; Remote Sensing SC Astronomy & Astrophysics; Remote Sensing GA BF13P UT WOS:A1995BF13P00016 ER PT B AU Desai, UD Gaither, CC AF Desai, UD Gaither, CC BE Bassani, L diCocco, G TI Solar X-ray imaging telescope SO IMAGING IN HIGH ENERGY ASTRONOMY LA English DT Proceedings Paper CT International Workshop on Imaging in High Energy Astronomy CY SEP 26-30, 1994 CL ANACAPRI, ITALY SP CNR, Leben, CREASO DE solar physics; X-ray instrumentation; telescope C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3788-3 PY 1995 BP 227 EP 233 PG 7 WC Astronomy & Astrophysics; Remote Sensing SC Astronomy & Astrophysics; Remote Sensing GA BF13P UT WOS:A1995BF13P00033 ER PT B AU Dingus, BL Esposito, JA Mukherjee, R Bertsch, DL Cuddapah, R Fichtel, CE Hartman, RC AF Dingus, BL Esposito, JA Mukherjee, R Bertsch, DL Cuddapah, R Fichtel, CE Hartman, RC BE Bassani, L diCocco, G TI Agate: Expanding on the success of EGRET SO IMAGING IN HIGH ENERGY ASTRONOMY LA English DT Proceedings Paper CT International Workshop on Imaging in High Energy Astronomy CY SEP 26-30, 1994 CL ANACAPRI, ITALY SP CNR, Leben, CREASO DE gamma-ray detectors; pair production; drift chambers C1 NASA,GODDARD SPACE FLIGHT CTR,UNIV SPACE RES ASSOC,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-3788-3 PY 1995 BP 293 EP 296 PG 4 WC Astronomy & Astrophysics; Remote Sensing SC Astronomy & Astrophysics; Remote Sensing GA BF13P UT WOS:A1995BF13P00046 ER PT B AU SALOMONSON, VV BARKER, J KNIGHT, E AF SALOMONSON, VV BARKER, J KNIGHT, E BE Descour, MR Mooney, JM Perry, DL Illing, L TI Spectral characteristics of the earth observing system (EOS) moderate resolution imaging spectroradiometer (MODIS) SO IMAGING SPECTROMETRY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1995 Imaging Spectrometry Conference CY APR 17-18, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 NASA,GODDARD SPACE FLIGHT CTR,EARTH SCI DIRECTORATE,GREENBELT,MD 20771. 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 0-8194-1833-1 J9 P SOC PHOTO-OPT INS PY 1995 VL 2480 BP 142 EP 152 DI 10.1117/12.210869 PG 11 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BD57Y UT WOS:A1995BD57Y00013 ER PT B AU HAMMER, PD PETERSON, DL SMITH, WH AF HAMMER, PD PETERSON, DL SMITH, WH BE Descour, MR Mooney, JM Perry, DL Illing, L TI Imaging interferometry for terrestrial remote sensing - Digital array scanned interferometer instrument developments SO IMAGING SPECTROMETRY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1995 Imaging Spectrometry Conference CY APR 17-18, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE IMAGING SPECTROMETERS; INTERFEROMETRY; TERRESTRIAL REMOTE SENSING; AIRBORNE SENSORS; DETECTOR ARRAY CALIBRATION C1 NASA,AMES RES CTR,DIV EARTH SCI,MOFFETT FIELD,CA 94035. NR 0 TC 5 Z9 5 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1833-1 J9 P SOC PHOTO-OPT INS PY 1995 VL 2480 BP 153 EP 164 DI 10.1117/12.210870 PG 12 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BD57Y UT WOS:A1995BD57Y00014 ER PT B AU GAO, BC AF GAO, BC BE Descour, MR Mooney, JM Perry, DL Illing, L TI A normalized difference water index for remote sensing of vegetation liquid water from space SO IMAGING SPECTROMETRY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1995 Imaging Spectrometry Conference CY APR 17-18, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 NASA,GODDARD SPACE FLIGHT CTR,JOINT CTR EARTH SYST SCI,GREENBELT,MD 20771. NR 0 TC 9 Z9 10 U1 1 U2 9 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1833-1 J9 P SOC PHOTO-OPT INS PY 1995 VL 2480 BP 225 EP 236 DI 10.1117/12.210877 PG 12 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BD57Y UT WOS:A1995BD57Y00021 ER PT J AU TAVERNIER, JP AF TAVERNIER, JP GP NCSL TI Measuring equipment management efficiency SO IMPACT OF METROLOGY ON GLOBAL TRADE - 1995 WORKSHOP AND SYMPOSIUM, PROCEEDINGS LA English DT Proceedings Paper CT 1995 Workshop and Symposium on the Impact of Metrology on Global Trade CY JUL 16-20, 1995 CL DALLAS, TX SP Natl Conf Stand Labs C1 CALTECH,JET PROP LAB,PASADENA,CA 91125. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NATL CONFERENCE STANDARDS LAB PI BOULDER PA 1800 30TH STREET, SUITE 305B, BOULDER, CO 80301 PY 1995 BP 323 EP 330 PG 4 WC Instruments & Instrumentation SC Instruments & Instrumentation GA BD64G UT WOS:A1995BD64G00030 ER PT S AU HUNTRESS, WT FEELEY, TJ BOYCE, JM AF HUNTRESS, WT FEELEY, TJ BOYCE, JM BE Masson, PL Kissel, J McDonnell, JAM TI NASA STRATEGY FOR MARS EXPLORATION IN THE 1990S AND BEYOND SO IN-SITU IMPACT DETECTION TECHNIQUES, INTERPLANETARY DUST, AND FUTURE MARS EXPLORATION SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT B1 Symposium and B1.1, B1.3 Meetings of COSPAR Scientific Commission B, at the 13th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res AB NASA's Office of Space Science is changing its approach to all its missions, both current and future. Budget realities are necessitating that we change the way we do business and the way we look at NASA's role in the U.S. Government. These challenges are being met by a new and innovative approach that focuses on achieving a balanced world-class space science program that requires less U.S. resources while providing an enhanced role for technology and education as integral components of our Research and Development (R&D) programs. Our Mars exploration plans, especially the Mars Surveyor program, are a key feature of this new NASA approach to space science. The Mars Surveyor program will be affordable, engaging to the public with global and close-up images of Mars, have high scientific value, employ a distributed risk strategy (two launches per opportunity), and will use significant advanced technologies. RP HUNTRESS, WT (reprint author), NASA HEADQUARTERS,OFF SPACE SCI,WASHINGTON,DC 20546, USA. NR 0 TC 0 Z9 0 U1 1 U2 2 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042661-1 J9 ADV SPACE RES PY 1995 VL 17 IS 12 BP 7 EP 14 PG 8 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Instruments & Instrumentation SC Astronomy & Astrophysics; Geology; Instruments & Instrumentation GA BE07S UT WOS:A1995BE07S00001 ER PT S AU GALEEV, A MOROZ, V LINKIN, V KREMNEV, R ROGOVSKY, G PICHKHADZE, K MARTYNOV, B PAPKOV, O EREMENKO, A GALIMOV, E SURKOV, Y ELACHI, C BOURKE, R MCNAMEE, J AF GALEEV, A MOROZ, V LINKIN, V KREMNEV, R ROGOVSKY, G PICHKHADZE, K MARTYNOV, B PAPKOV, O EREMENKO, A GALIMOV, E SURKOV, Y ELACHI, C BOURKE, R MCNAMEE, J BE Masson, PL Kissel, J McDonnell, JAM TI MARS GLOB - CREATION OF AN INTERNATIONAL NETWORK OF MARS SURFACE LANDERS SO IN-SITU IMPACT DETECTION TECHNIQUES, INTERPLANETARY DUST, AND FUTURE MARS EXPLORATION SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT B1 Symposium and B1.1, B1.3 Meetings of COSPAR Scientific Commission B, at the 13th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res AB Program MARS GLOB provides step-by-step deployment of an international network of Mars surface stations by association the MESUR NETWORK (USA), INTERMARS-NET (ESA) programs with the network of small stations and penetrators now under developing in Russia jointly with international cooperation in frameworks of the MARS-96 Project. It is offering also delivery on Mars surface two penetrators and Mars Rover. Now penetrators and Rover are developing by Russia with participation of other countries in frameworks of the MARS-98 (or MARS TOUR) Project. C1 BABAKIN CTR,CHIMKI,RUSSIA. VI VERNADSKII GEOCHEM & ANAL CHEM INST,MOSCOW,RUSSIA. CALTECH,JET PROP LAB,PASADENA,CA. RP GALEEV, A (reprint author), RUSSIAN ACAD SCI,INST SPACE RES,MOSCOW V-71,RUSSIA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042661-1 J9 ADV SPACE RES PY 1995 VL 17 IS 12 BP 15 EP 20 PG 6 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Instruments & Instrumentation SC Astronomy & Astrophysics; Geology; Instruments & Instrumentation GA BE07S UT WOS:A1995BE07S00002 ER PT S AU GALEEV, AA MOROZ, VI LINKIN, VM ZAKHAROV, AV BASILEVSKY, AT SURKOV, YA AKIM, EL DUXBURY, T KREMNEV, RS MARTYNOV, BN PAPKOV, OV AF GALEEV, AA MOROZ, VI LINKIN, VM ZAKHAROV, AV BASILEVSKY, AT SURKOV, YA AKIM, EL DUXBURY, T KREMNEV, RS MARTYNOV, BN PAPKOV, OV BE Masson, PL Kissel, J McDonnell, JAM TI PHOBOS SAMPLE RETURN MISSION SO IN-SITU IMPACT DETECTION TECHNIQUES, INTERPLANETARY DUST, AND FUTURE MARS EXPLORATION SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT B1 Symposium and B1.1, B1.3 Meetings of COSPAR Scientific Commission B, at the 13th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res AB Scientific objectives and description of a mission to deliver soil sample from Phobas, the inner moon of Mars to the Earth within the launching windows of 1998, 2001, 2003 and 2005 are described. The Phobos Sample Return Mission is not only the highest science importance for the return of sample from a primitive body but provides an early testbed for the technology development needed to support a Mars Sample return Mission. The Phobos mission can be flown earlier and easier because Phobos has neither a significant gravity nor an atmosphere as Mars to contend with for landing and departure. C1 VI VERNADSKII GEOCHEM & ANAL CHEM INST,MOSCOW,RUSSIA. RUSSIAN ACAD SCI,INST APPL MATH,MOSCOW V-71,RUSSIA. CALTECH,JET PROP LAB,PASADENA,CA. BABAKIN SPACE RES CTR,MOSCOW,RUSSIA. RP GALEEV, AA (reprint author), RUSSIAN ACAD SCI,INST SPACE RES,MOSCOW V-71,RUSSIA. NR 3 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 0-08-042661-1 J9 ADV SPACE RES PY 1995 VL 17 IS 12 BP 31 EP 47 PG 17 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Instruments & Instrumentation SC Astronomy & Astrophysics; Geology; Instruments & Instrumentation GA BE07S UT WOS:A1995BE07S00004 ER PT S AU LEESE, MR MCDONNELL, JAM GREEN, SF BUSOLETTI, E CLARK, BC COLANGELI, L CRIFO, JF EBERHARDT, P GIOVANE, F GRUN, E GUSTAFSON, B HUGHES, DW JACKSON, D LAMY, P LANGEVIN, Y MANN, I MCKENNALAWLOR, S TANNER, WG WEISSMAN, PR ZARNECKI, JC AF LEESE, MR MCDONNELL, JAM GREEN, SF BUSOLETTI, E CLARK, BC COLANGELI, L CRIFO, JF EBERHARDT, P GIOVANE, F GRUN, E GUSTAFSON, B HUGHES, DW JACKSON, D LAMY, P LANGEVIN, Y MANN, I MCKENNALAWLOR, S TANNER, WG WEISSMAN, PR ZARNECKI, JC BE Masson, PL Kissel, J McDonnell, JAM TI DUST FLUX ANALYZER EXPERIMENT FOR THE ROSETTA MISSION SO IN-SITU IMPACT DETECTION TECHNIQUES, INTERPLANETARY DUST, AND FUTURE MARS EXPLORATION SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT B1 Symposium and B1.1, B1.3 Meetings of COSPAR Scientific Commission B, at the 13th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res AB We present the description of a design for a proposed Dust Flux Analyser for the Rosetta cometary mission. A concept first developed for the NASA/ESA Tempel II Rendezvous and Halley Intercept Mission /1/, the instrument is able to measure dust particle parameters and fluxes over a velocity range typical of emission from cometary surfaces. It would be mounted on the Rosetta Orbiter and would measure the variation in Bur rate throughout all mission phases at the comet. The instrument would measure particle flux, velocity, momentum and density, shape and scattering properties. C1 UNIV NAPLES,IST NAVALE,I-80133 NAPLES,ITALY. MARTIN MARIETTA AEROSP CO,DENVER,CO 80201. OSSERV ASTRON CAPODIMONTE,I-80131 NAPLES,ITALY. CNRS,SERV AERON,F-91371 VERRIERES BUISSON,FRANCE. UNIV BERN,INST PHYS,CH-3012 BERN,SWITZERLAND. UNIV FLORIDA,DEPT ASTRON,GAINESVILLE,FL 32611. MAX PLANCK INST KERNPHYS,D-69029 HEIDELBERG,GERMANY. UNIV SHEFFIELD,DEPT PHYS,SHEFFIELD S10 7RH,S YORKSHIRE,ENGLAND. UNIV KENT,APPL OPT GRP,CANTERBURY CT2 7NR,KENT,ENGLAND. TRAVERSE SIPHON,ASTRON SPATIALE LAB,F-13376 MARSEILLE 12,FRANCE. UNIV PARIS 11,LAB RENE BERNAS,F-91406 ORSAY,FRANCE. MAX PLANCK INST AERON,W-3411 KATLENBURG DUHM,GERMANY. ST PATRICKS COLL,DEPT EXPTL PHYS,MAYNOOTH,KILDARE,IRELAND. BAYLOR UNIV,DEPT PHYS,WACO,TX 76798. CALTECH,JET PROP LAB,PASADENA,CA 91109. RP LEESE, MR (reprint author), UNIV KENT,SPACE SCI UNIT,CANTERBURY CT2 7NR,KENT,ENGLAND. RI Green, Simon/C-7408-2009; Gustafson, Bo/B-9526-2011 NR 5 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042661-1 J9 ADV SPACE RES PY 1995 VL 17 IS 12 BP 137 EP 140 PG 4 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Instruments & Instrumentation SC Astronomy & Astrophysics; Geology; Instruments & Instrumentation GA BE07S UT WOS:A1995BE07S00018 ER PT B AU MERCER, CR CREATH, K AF MERCER, CR CREATH, K BE Harding, KG Stahl, HP TI PHASE MEASUREMENT USING A LIQUID CRYSTAL POINT DIFFRACTION INTERFEROMETER SO INDUSTRIAL OPTICAL SENSORS FOR METROLOGY AND INSPECTION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Industrial Optical Sensors for Metrology and Inspection CY OCT 31-NOV 01, 1994 CL BOSTON, MA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE PHASE MEASUREMENT; PHASE STEPPING; LIQUID CRYSTALS; INTERFEROMETRY C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 0 Z9 0 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1684-3 J9 P SOC PHOTO-OPT INS PY 1995 VL 2349 BP 95 EP 99 DI 10.1117/12.198695 PG 5 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BC33J UT WOS:A1995BC33J00010 ER PT B AU WERNER, MW FANSON, J AF WERNER, MW FANSON, J BE Fowler, AM TI Overview of the SIRTF mission SO INFRARED DETECTORS AND INSTRUMENTATION FOR ASTRONOMY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Infrared Detectors and Instrumentation for Astronomy CY APR 18-21, 1995 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 JET PROPULS LAB,PASADENA,CA 91107. NR 0 TC 8 Z9 8 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1828-5 J9 P SOC PHOTO-OPT INS PY 1995 VL 2475 BP 418 EP 427 DI 10.1117/12.211279 PG 10 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BD42D UT WOS:A1995BD42D00043 ER PT B AU CAMPBELL, JW FIKES, J GERRY, M MCCARTER, J BLEVINS, H JONES, B WILLIAMS, D CHANDLER, H GREEN, A SCHMITT, T VESTAL, L WRIGHT, B JACKSON, J SCHUNK, G SWAIM, K SPENCER, S AF CAMPBELL, JW FIKES, J GERRY, M MCCARTER, J BLEVINS, H JONES, B WILLIAMS, D CHANDLER, H GREEN, A SCHMITT, T VESTAL, L WRIGHT, B JACKSON, J SCHUNK, G SWAIM, K SPENCER, S BE Scholl, MS Andresen, BF TI Sun-synchronous orbit mission for passively cooled reconnaissance of the interstellar medium SO INFRARED SPACEBORNE REMOTE SENSING III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Infrared Spaceborne Remote Sensing III CY JUL 12-14, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE INFRARED ASTRONOMY; INTERSTELLAR MEDIUM; INFRARED SPECTROSCOPY; INFRARED SPACE SCIENCE MISSION C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. 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 0-8194-1912-5 J9 P SOC PHOTO-OPT INS PY 1995 VL 2553 BP 14 EP 25 DI 10.1117/12.221356 PG 12 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BE21U UT WOS:A1995BE21U00002 ER PT B AU LUCHIK, TS ISRAELSSON, UE CHAVE, RG NASH, AE HARDY, J AF LUCHIK, TS ISRAELSSON, UE CHAVE, RG NASH, AE HARDY, J BE Scholl, MS Andresen, BF TI SIRTF telescope test facility SO INFRARED SPACEBORNE REMOTE SENSING III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Infrared Spaceborne Remote Sensing III CY JUL 12-14, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE INFRARED; CRYOSTAT; TELESCOPE; SIRTF C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-8194-1912-5 J9 P SOC PHOTO-OPT INS PY 1995 VL 2553 BP 547 EP 556 DI 10.1117/12.221384 PG 10 WC Instruments & Instrumentation; Remote Sensing; Optics SC Instruments & Instrumentation; Remote Sensing; Optics GA BE21U UT WOS:A1995BE21U00050 ER PT B AU SARUSI, G GUNAPALA, SD PARK, JS LIU, JK LIN, TL MAKER, PD MULLER, RE LEVINE, BF AF SARUSI, G GUNAPALA, SD PARK, JS LIU, JK LIN, TL MAKER, PD MULLER, RE LEVINE, BF BE Andresen, BF Scholl, MS TI 15 mu m cut-off 128x128 quantum well infrared photodetectors (QWIPs) camera SO INFRARED TECHNOLOGY XXI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 21st Conference on Infrared Technology CY JUL 09-13, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers C1 CALTECH,JET PROP LAB,CTR SPACE MICROELECTR TECHNOL,PASADENA,CA 91109. 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 0-8194-1911-7 J9 P SOC PHOTO-OPT INS PY 1995 VL 2552 BP 467 EP 475 DI 10.1117/12.218247 PN 1-2 PG 9 WC Optics SC Optics GA BE06Z UT WOS:A1995BE06Z00046 ER PT B AU KRASICH, M AF KRASICH, M GP INST ENVIRONM SCI TI Reliability achievement through the technical risk assessment SO INSTITUTE OF ENVIRONMENTAL SCIENCES, 1995 PROCEEDINGS: PRODUCT RELIABILITY; DESIGN, TEST, AND EVALUATION LA English DT Proceedings Paper CT 41st Annual Technical Meeting of the Institute-of-Environmental-Sciences - Developing Future Leaders of Technology CY APR 30-MAY 05, 1995 CL ANAHEIM, CA SP Inst Environm Sci DE TECHNICAL RISK; RISK REDUCTION; TRADEOFF; RELIABILITY C1 CALTECH,JET PROP LAB,PASADENA,CA 91125. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INST ENVIRONMENTAL SCIENCES PI MT PROSPECT PA 940 E NORTHWEST HIGHWAY, MT PROSPECT, IL 60056 BN 1-877862-43-6 PY 1995 BP 80 EP 85 PG 6 WC Engineering, Multidisciplinary SC Engineering GA BD39E UT WOS:A1995BD39E00010 ER PT B AU BARELA, PR COMFORD, SL AF BARELA, PR COMFORD, SL GP INST ENVIRONM SCI TI A systematic approach to hardware qualification SO INSTITUTE OF ENVIRONMENTAL SCIENCES, 1995 PROCEEDINGS: PRODUCT RELIABILITY; DESIGN, TEST, AND EVALUATION LA English DT Proceedings Paper CT 41st Annual Technical Meeting of the Institute-of-Environmental-Sciences - Developing Future Leaders of Technology CY APR 30-MAY 05, 1995 CL ANAHEIM, CA SP Inst Environm Sci DE HARDWARE QUALIFICATION; QFD; PHYSICS OF FAILURE; FAILURE MODES; DEFECT DETECTION; DEFECT PREVENTION; TEST EFFECTIVENESS; RISK MANAGEMENT C1 CALTECH,JET PROP LAB,PASADENA,CA 91125. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INST ENVIRONMENTAL SCIENCES PI MT PROSPECT PA 940 E NORTHWEST HIGHWAY, MT PROSPECT, IL 60056 BN 1-877862-43-6 PY 1995 BP 118 EP 126 PG 9 WC Engineering, Multidisciplinary SC Engineering GA BD39E UT WOS:A1995BD39E00015 ER PT B AU BERGEN, TF AF BERGEN, TF GP INST ENVIRONM SCI TI Vibration damping of the Cassini spacecraft structure SO INSTITUTE OF ENVIRONMENTAL SCIENCES, 1995 PROCEEDINGS: PRODUCT RELIABILITY; DESIGN, TEST, AND EVALUATION LA English DT Proceedings Paper CT 41st Annual Technical Meeting of the Institute-of-Environmental-Sciences - Developing Future Leaders of Technology CY APR 30-MAY 05, 1995 CL ANAHEIM, CA SP Inst Environm Sci DE CASSINI SPACECRAFT; TITAN IV PAYLOAD FAIRING; DAMPING; VISCOELASTIC MATERIAL; TUNED VIBRATION ABSORBER; VIBRATION REDUCTION; REVERBERANT ACOUSTIC TEST C1 CALTECH,JET PROP LAB,DYNAM ENVIRONM ENGN GRP,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INST ENVIRONMENTAL SCIENCES PI MT PROSPECT PA 940 E NORTHWEST HIGHWAY, MT PROSPECT, IL 60056 BN 1-877862-43-6 PY 1995 BP 189 EP 195 PG 7 WC Engineering, Multidisciplinary SC Engineering GA BD39E UT WOS:A1995BD39E00025 ER PT B AU WISE, JH AF WISE, JH GP INST ENVIRONM SCI TI Processing effects on 1/f noise and other data artifacts SO INSTITUTE OF ENVIRONMENTAL SCIENCES, 1995 PROCEEDINGS: PRODUCT RELIABILITY; DESIGN, TEST, AND EVALUATION LA English DT Proceedings Paper CT 41st Annual Technical Meeting of the Institute-of-Environmental-Sciences - Developing Future Leaders of Technology CY APR 30-MAY 05, 1995 CL ANAHEIM, CA SP Inst Environm Sci DE 1/F NOISE SUPPRESSION; DC LEAKAGE; POWER SPECTRAL DENSITY; CROSS SPECTRAL DENSITY; COHERENT OUTPUT POWER; WEIGHTING FUNCTIONS; RESOLUTION BANDWIDTH C1 CALTECH,JET PROPULS LAB,PASADENA,CA 91125. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INST ENVIRONMENTAL SCIENCES PI MT PROSPECT PA 940 E NORTHWEST HIGHWAY, MT PROSPECT, IL 60056 BN 1-877862-43-6 PY 1995 BP 225 EP 239 PG 15 WC Engineering, Multidisciplinary SC Engineering GA BD39E UT WOS:A1995BD39E00029 ER PT B AU Schenker, PS Blaney, DL Brown, DK BarCohen, Y Lih, SS Lindemann, RA Paljug, ED Slostad, JT Tharp, GK Tucker, CE Voorhees, CJ Weisbin, C AF Schenker, PS Blaney, DL Brown, DK BarCohen, Y Lih, SS Lindemann, RA Paljug, ED Slostad, JT Tharp, GK Tucker, CE Voorhees, CJ Weisbin, C BE Casasent, DP TI Mars lander robotics and machine vision capabilities for in situ planetary science SO INTELLIGENT ROBOTS AND COMPUTER VISION XIV: ALGORITHMS, TECHNIQUES, ACTIVE VISION, AND MATERIALS HANDLING SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Intelligent Robots and Computer Vision XIV - Algorithms, Techniques, Active Vision, and Materials Handling CY OCT 23-26, 1995 CL PHILADELPHIA, PA SP Soc Photo Opt Instrumentat Engineers DE robotics; manipulators; machine vision; visual calibration; visual servoing; Mars science; Mars Surveyor Program C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-8194-1952-4 J9 P SOC PHOTO-OPT INS PY 1995 VL 2588 BP 159 EP 170 DI 10.1117/12.222667 PG 12 WC Automation & Control Systems; Computer Science, Artificial Intelligence; Optics SC Automation & Control Systems; Computer Science; Optics GA BE29J UT WOS:A1995BE29J00017 ER PT B AU HOPPE, DJ PEREZ, RM BHANJI, AM GUO, HZ ROGERS, J TATE, JP AF HOPPE, DJ PEREZ, RM BHANJI, AM GUO, HZ ROGERS, J TATE, JP BE Brandt, HE TI Phase locking of a second harmonic gyrotron using a quasi-optical circulator SO INTENSE MICROWAVE PULSES III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Intense Microwave Pulses III Conference CY JUL 10-12, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers DE PHASE LOCKING; GYROTRON; CIRCULATOR; QUASI-OPTICAL C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-8194-1916-8 J9 P SOC PHOTO-OPT INS PY 1995 VL 2557 BP 356 EP 366 DI 10.1117/12.218574 PG 11 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA BE16A UT WOS:A1995BE16A00041 ER PT S AU HOWE, JM BENSON, WE GARG, A CHANG, YC AF HOWE, JM BENSON, WE GARG, A CHANG, YC BE Muddle, BC TI IN-SITU HOT-STAGE HIGH-RESOLUTION TRANSMISSION ELECTRON-MICROSCOPY OF INTERFACE DYNAMICS DURING GROWTH AND DISSOLUTION OF (111)ALPHA THETA-AL2CU PLATES IN AN AL-CU-MG-AS ALLOY SO INTERFACES II SE MATERIALS SCIENCE FORUM LA English DT Article; Proceedings Paper CT 2nd International Conference on the Role of Interfaces in Advanced Materials Design, Processing and Performance CY NOV 01-05, 1993 CL BALLARAT, AUSTRALIA SP Monash Univ, Ctr Adv Mat Technol, Natl Key Ctr Teaching & Res, Cooperat Res Ctr Polym Blends, Inst Mat, UK, Inst Met Mat Australasia Ltd DE IN SITU TEM; PRECIPITATE PLATES; INTERFACE DYNAMICS ID LEDGED INTERPHASE BOUNDARIES; MG-0.5 AG ALLOY; OMEGA-PHASE; KINETICS; TRAIN; STEPS AB In situ hot-stage high-resolution transmission electron microscopy was performed both parallel and perpendicular to the {111}(alpha) habit plane of theta-Al2Cu precipitate plates in an Al-3.9Cu-0.5Mg-0.5Ag (wt.%) alloy in order to determine the atomic mechanisms and kinetics of the transformation. The results from these studies show that theta plates grow by a terrace-ledge-kink mechanism, where the smallest ledges and kinks are one-half of a unit cell of the theta phase. The morphology of the plate within the habit plane is obtained by varying the density of kinks along the edge. Kinetic analyses of ledge motion and plate lengthening indicate that surface diffusion may dominate the kinetics on theta plates which intersect the foil surface while similar studies performed on plates contained within the foil yield results which are reasonable for a bulk diffusion process limited by the nucleation and growth of kinks along the plate edge. The role of strain energy on the precipitate morphology is briefly discussed. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. CHUNG SHAN INST SCI & TECHNOL,AERONAUT RES LAB,TAICHUNG,TAIWAN. RP HOWE, JM (reprint author), UNIV VIRGINIA,DEPT MAT SCI & ENGN,CHARLOTTESVILLE,VA 22903, USA. NR 26 TC 3 Z9 3 U1 1 U2 5 PU TRANS TECH PUBLICATIONS LTD PI ZURICH PA P O BOX 254, CH-8049 ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-693-9 J9 MATER SCI FORUM PY 1995 VL 189- BP 255 EP 260 PG 6 WC Materials Science, Ceramics; Materials Science, Multidisciplinary; Materials Science, Characterization & Testing; Materials Science, Coatings & Films; Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA BE01S UT WOS:A1995BE01S00031 ER PT B AU MERCER, CR CREATH, K RASHIDNIA, N AF MERCER, CR CREATH, K RASHIDNIA, N BE Kujawinska, M Pryputniewicz, RJ Takeda, M TI A phase-stepped point diffraction interferometer using liquid crystals SO INTERFEROMETRY VII: TECHNIQUES AND ANALYSIS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Interferometry VII - Techniques and Analysis Conference CY JUL 11-12, 1995 CL SAN DIEGO, CA SP Soc Photo Opt Instrumentat Engineers, Soc Exptl Mech DE COMMON-PATH INTERFEROMETER; ERROR REDUCTION; PHASE MEASUREMENT ALGORITHM; WAVE-FRONT MEASUREMENT; TEMPERATURE MEASUREMENT C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 4 Z9 4 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1903-6 J9 P SOC PHOTO-OPT INS PY 1995 VL 2544 BP 87 EP 93 PG 7 WC Instruments & Instrumentation; Optics SC Instruments & Instrumentation; Optics GA BD37G UT WOS:A1995BD37G00009 ER PT J AU NATHAL, MV LIU, CT AF NATHAL, MV LIU, CT TI INTRINSIC DUCTILITY OF FEAL SINGLE-CRYSTALS SO INTERMETALLICS LA English DT Article DE IRON ALUMINIDES; DUCTILITY; ENVIRONMENTAL EMBRITTLEMENT; FRACTURE ID ROOM-TEMPERATURE DUCTILITY; ENVIRONMENTAL EMBRITTLEMENT; AL-ALLOYS; FRACTURE; HYDROGEN AB The room-temperature ductility of FeAl is significantly reduced by environmental embrittlement caused by the water vapor present in air. Since Fe-rich FeAl can fail by either transgranular or intergranular fracture in both wet and dry environments, the relative effects of the environment on grain boundaries versus the grain interior are not known and warrant study. In this investigation, the effect of test environment on the tensile properties of single crystals of Fe-40Al was studied in order to eliminate the effects of grain boundaries. It was found that the single crystals exhibited significantly higher room-temperature ductilities when tested in a moisture-free environment, although '001' cleavage fracture initiation remained the same as for samples tested in air. At the 40 at% Al level, the degree of environmental embrittlement in the single crystals was similar to that observed in fine-grained binary polycrystals and B-doped polycrystals. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP NATHAL, MV (reprint author), NASA,LEWIS RES CTR,CLEVELAND,OH 44135, USA. OI Liu, Chain Tsuan/0000-0001-7888-9725 NR 12 TC 33 Z9 33 U1 0 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0966-9795 J9 INTERMETALLICS JI Intermetallics PY 1995 VL 3 IS 1 BP 77 EP 81 DI 10.1016/0966-9795(94)P3689-L PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA PW410 UT WOS:A1995PW41000010 ER PT J AU JOHNSON, DR CHEN, XF OLIVER, BF NOEBE, RD WHITTENBERGER, JD AF JOHNSON, DR CHEN, XF OLIVER, BF NOEBE, RD WHITTENBERGER, JD TI PROCESSING AND MECHANICAL-PROPERTIES OF IN-SITU COMPOSITES FROM THE NIAL-CR AND THE NIAL-(CR,MO) EUTECTIC SYSTEMS SO INTERMETALLICS LA English DT Article DE IN-SITU COMPOSITES; NIAL-CR; NIAL-(CR,MO); DIRECTIONAL SOLIDIFICATION; EUTECTIC MORPHOLOGY; CREEP RESISTANCE ID FRACTURE-TOUGHNESS; DEFORMATION; ALLOY; AL AB In-situ composites based on the NiAl-Cr eutectic system have been successfully produced by containerless processing and evaluated. Molybdenum additions of 0.6 to 6 at.% were used to change the eutectic microstructure. The NiAl-Cr alloys had a fibrous microstructure, while the NiAl-(Cr,Mo) alloys containing 1 at.% or more of molybdenum exhibited a lamellar structure. The room temperature fracture toughness of the different eutectic alloys was evaluated. The toughness values of the directionally solidified eutectics were similar regardless of composition or eutectic morphology, but all the directionally solidified alloys exhibited superior toughness compared to binary NiAl or conventionally cast eutectics. However, the principal mechanism responsible for the improved toughness of the directionally solidified alloys was dependent on the second phase morphology. The effect of eutectic morphology on the 1300 K creep strength was also investigated by testing a typical fiber reinforced and a lamellar reinforced eutectic. A molybdenum-doped alloy with the lamellar eutectic morphology exhibited the best creep resistance. Due to the promising creep behavior of this NiAl-28Cr-6Mo alloy at 1300 K, additional creep testing was performed at 1200 at 1400 K. This NiAl-(Cr,Mo) eutectic displays promising high temperature strength while still maintaining a reasonable room temperature fracture toughness when compared to other NiAl-based eutectics. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RP JOHNSON, DR (reprint author), UNIV TENNESSEE,KNOXVILLE,TN 37996, USA. NR 40 TC 201 Z9 232 U1 0 U2 24 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0966-9795 J9 INTERMETALLICS JI Intermetallics PY 1995 VL 3 IS 2 BP 99 EP 113 DI 10.1016/0966-9795(95)92674-O PG 15 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA QK655 UT WOS:A1995QK65500002 ER PT J AU JOHNSON, DR CHEN, XF OLIVER, BF NOEBE, RD WHITTENBERGER, JD AF JOHNSON, DR CHEN, XF OLIVER, BF NOEBE, RD WHITTENBERGER, JD TI DIRECTIONAL SOLIDIFICATION AND MECHANICAL-PROPERTIES OF NIAL-NIALTA ALLOYS SO INTERMETALLICS LA English DT Article DE IN-SITU COMPOSITES; NIAL-NIALTA; DIRECTIONAL SOLIDIFICATION; CREEP RESISTANCE; FRACTURE TOUGHNESS ID IRON-ALUMINUM ALLOYS; INTERMETALLIC ALLOYS; TEMPERATURE CREEP; NICKEL; BEHAVIOR; DUCTILITY AB Directional solidification of eutectic alloys is a promising technique for producing in-situ composite materials exhibiting a balance of properties. Consequently, the microstructure, creep strength and fracture toughness of directionally solidified NiAl-NiAlTa alloys were investigated. Directional solidification was performed by containerless processing techniques to minimize alloy contamination. The eutectic composition was found to be NiAl-15.5 at% Ta and well-aligned microstructures were produced at this composition. A near-eutectic alloy of NiAl-14.5Ta was also investigated. Directional solidification of the near-eutectic composition resulted in microstructures consisting of NiAl dendrites surrounded by aligned eutectic regions. The off-eutectic alloy exhibited promising compressive creep strengths compared to other NiAl-based intermetallics, while preliminary testing indicated that the eutectic alloy was competitive with Ni-base single crystal superalloys. The room temperature toughness of these two-phase alloys was similar to that of polycrystalline NiAl even with the presence of the brittle Laves phase NiAlTa. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RP JOHNSON, DR (reprint author), UNIV TENNESSEE,DEPT MAT SCI & ENGN,KNOXVILLE,TN 37996, USA. NR 29 TC 35 Z9 37 U1 1 U2 6 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0966-9795 J9 INTERMETALLICS JI Intermetallics PY 1995 VL 3 IS 2 BP 141 EP 152 DI 10.1016/0966-9795(95)92679-T PG 12 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA QK655 UT WOS:A1995QK65500007 ER PT J AU WHITTENBERGER, JD KUMAR, KS DIPIETRO, MS BROWN, SA AF WHITTENBERGER, JD KUMAR, KS DIPIETRO, MS BROWN, SA TI CHARACTERISTICS OF ELEVATED-TEMPERATURE DEFORMATION IN SEVERAL L1(2)-MODIFIED AL3TI-BASED ALLOYS SO INTERMETALLICS LA English DT Article DE AL3TI; AL3TI-BASED; CREEP; MECHANICAL PROPERTIES ID COMPRESSION BEHAVIOR; L12 TRIALUMINIDES; AL66TI25MN9; AL67TI25CR8; AL3TI; COMPOUND; PHASES; COMPOSITES; DUCTILITY; MN AB Replacement of approximately 9 at% of the Al in the DO22 crystal structure compound AI(3)Ti with Cr, Fe and/or Mn leads to the formation of a potentially more ductile Ll(2) phase. Utilizing room temperature hardness as a measure of ductility, a series of quaternary alloys containing a total of 9 at% of Cr, Fe and/or Mn in Al-25Ti was produced. Based on the presence of a single phase and minimums in hardness-composition profiles, a quinary and four quaternary compositions were selected for further study, cast as 2 kg heats and forged into pancakes. Small diameter compression test samples were taken from each forging and tested under constant velocity and constant load conditions in air between 900 and 1200 K. The results from this testing indicated that the quinary alloy, Al66Ti25Mn4.5Cr3Fe1.5, had the best strength; however results from other work (K. S. Kumar and S. A. Brown, Scripta Metall, et Mater., 26 (1993) 197-202) indicates that grain size might be more important than composition in determining elevated temperature deformation resistance. Comparison of the existing creep results for Ll(2)-modified Al3Ti indicates that larger grain sizes are necessary for strength and that the stress-independent activation energies for deformation are close to that measured for volume diffusion even when grain boundary deformation mechanisms are active. Contrasting the 1100 K creep behavior of the quinary composition to other Ti-Al intermetallics reveals that the current Ll(2) forms of Al3Ti do not possess a strength advantage over single phase alpha, or gamma alloys or a lamellar alpha(2) + gamma mixture. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. MARTIN MARIETTA CORP,BALTIMORE,MD. NR 31 TC 7 Z9 7 U1 1 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0966-9795 J9 INTERMETALLICS JI Intermetallics PY 1995 VL 3 IS 3 BP 221 EP 232 DI 10.1016/0966-9795(95)98933-Y PG 12 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA QU532 UT WOS:A1995QU53200005 ER PT J AU JOHNSON, DR OLIVER, BF NOEBE, RD WHITTENBERGER, JD AF JOHNSON, DR OLIVER, BF NOEBE, RD WHITTENBERGER, JD TI NIAL-BASED POLYPHASE IN-SITU COMPOSITES IN THE NIAL-TA-X (X=CR, MO, OR V) SYSTEMS SO INTERMETALLICS LA English DT Article DE NIAL; IN SITU COMPOSITES; PROCESSING; CREEP ID CONSTITUTION AB Polyphase in situ composites were generated by directional solidification of ternary eutectics. This work was performed to discover if a balance of properties could be produced by combining the NiAl-Laves phase and the NiAl-refractory metal phase eutectics. The systems investigated were the Ni-Al-Ta-X (X = Cr, Mo, or V) alloys. Ternary eutectics were found in each of these systems and the eutectic composition, temperature, and morphology were determined. The ternary eutectic systems examined were the NiAl-NiAlTa-(Mo, Ta), NiAl-(Cr, Al) NiTa-Cr, and the NiAl-NiAlTa-V systems. Each eutectic consists of NiAl, a C14 Laves phase, and a refractory metal phase. Directional solidification was performed by containerless processing techniques in a levitation zone refiner to minimize alloy contamination. Room temperature fracture toughness of these materials was determined by a four-point bend test. Preliminary creep behavior was determined by compression tests at elevated temperatures, 1100-1400 K. Of the ternary eutectics, the one in the NiAl-Ta-Cr system was found to be the most promising. The fracture toughness of the NiAl-(Cr, Al)NiTa-Cr eutectic was intermediate between the values of the NiAl-NiAlTa eutectic and the NiAl-Cr eutectic. The creep strength of this ternary eutectic was similar to or greater than that of the NiAl-Cr eutectic. C1 UNIV TENNESSEE,DEPT MAT SCI & ENGN,KNOXVILLE,TN 37996. NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 11 TC 47 Z9 52 U1 1 U2 6 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0966-9795 J9 INTERMETALLICS JI Intermetallics PY 1995 VL 3 IS 6 BP 493 EP 503 DI 10.1016/0966-9795(95)00008-M PG 11 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA RW564 UT WOS:A1995RW56400006 ER PT B AU Fang, WC Sheu, BJ Venus, H Sandau, R AF Fang, WC Sheu, BJ Venus, H Sandau, R GP IEEE COMP SOC TECH COMM DESIGN AUTOMAT TI Smart-pixel array processors based on optimal cellular neural networks for space sensor applications SO INTERNATIONAL CONFERENCE ON COMPUTER DESIGN: VLSI IN COMPUTERS & PROCESSORS, PROCEEDINGS LA English DT Proceedings Paper CT International Conference on Computer Design - VLSI in Computers and Processors (ICCD 95) CY OCT 02-04, 1995 CL AUSTIN, TX SP IEEE Comp Soc Tech Comm Design Automat, IEEE Circuits & Syst Soc, IEEE Electron Devices Soc C1 CALTECH,JET PROP LAB,CTR SPACE MICROELECTR TECHNOL,PASADENA,CA 91109. 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 0-8186-7165-3 PY 1995 BP 703 EP 708 DI 10.1109/ICCD.1995.528945 PG 6 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BE54G UT WOS:A1995BE54G00104 ER PT B AU Sull, SH Sridhar, B AF Sull, SH Sridhar, B GP IEEE, SIGNAL PROC SOC TI Model-based obstacle detection from image sequences SO INTERNATIONAL CONFERENCE ON IMAGE PROCESSING - PROCEEDINGS, VOLS I-III LA English DT Proceedings Paper CT International Conference on Image Processing CY OCT 23-26, 1995 CL WASHINGTON, DC SP IEEE, Signal Proc Soc C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. 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 0-7803-3122-2 PY 1995 BP B647 EP B650 PG 4 WC Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic; Optics SC Computer Science; Engineering; Optics GA BE52H UT WOS:A1995BE52H00328 ER PT B AU Fossum, ER AF Fossum, ER GP IEEE TI CMOS image sensors: Electronic camera on a chip SO INTERNATIONAL ELECTRON DEVICES MEETING, 1995 - IEDM TECHNICAL DIGEST LA English DT Proceedings Paper CT 1995 International Electron Devices Meeting CY DEC 10-13, 1995 CL WASHINGTON, DC SP IEEE, Electron Devices Soc C1 CALTECH,JET PROP LAB,CTR SPACE MICROELECTR TECHNOL,PASADENA,CA 91109. NR 0 TC 64 Z9 64 U1 0 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2700-4 PY 1995 BP 17 EP 25 PG 9 WC Engineering, Electrical & Electronic SC Engineering GA BF10D UT WOS:A1995BF10D00003 ER PT J AU Andre, AD Hancock, PA AF Andre, AD Hancock, PA TI Pilot workload: Contemporary issues SO INTERNATIONAL JOURNAL OF AVIATION PSYCHOLOGY LA English DT Editorial Material C1 UNIV MINNESOTA,MINNEAPOLIS,MN 55455. RP Andre, AD (reprint author), NASA,AMES RES CTR,WESTERN AEROSP LABS INC,MS 262-3,MOFFETT FIELD,CA 94035, USA. NR 19 TC 21 Z9 21 U1 1 U2 3 PU LAWRENCE ERLBAUM ASSOC INC PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430-2262 SN 1050-8414 J9 INT J AVIAT PSYCHOL JI Int. J. Aviat. Psychol. PY 1995 VL 5 IS 1 BP 1 EP 4 DI 10.1207/s15327108ijap0501_1 PG 4 WC Psychology, Applied SC Psychology GA TQ898 UT WOS:A1995TQ89800001 ER PT J AU Andre, AD Heers, ST Cashion, PA AF Andre, AD Heers, ST Cashion, PA TI Effects of workload preview on task scheduling during simulated instrument flight SO INTERNATIONAL JOURNAL OF AVIATION PSYCHOLOGY LA English DT Article AB Our study examined pilot scheduling behavior in the context of simulated instrument flight. Over the course of the flight, pilots flew along specified routes while scheduling and performing several flight-related secondary tasks. The first phase of flight was flown under low-workload conditions, whereas the second phase of flight was flown under high-workload conditions in the form of increased turbulence and a disorganized instrument layout. Six pilots were randomly assigned to each of three workload preview groups. Subjects in the no-preview group were not given preview of the increased-workload conditions. Subjects in the declarative preview group were verbally informed of the nature of the flight workload manipulation but did not receive any practice under the high-workload conditions. Subjects in the procedural preview group received the same instructions as the declarative preview group but also flew half of the practice flight under the high-workload conditions. The results show that workload preview fostered efficient scheduling strategies. Specifically, those pilots with either declarative or procedural preview of future workload demands adopted an efficient strategy of scheduling more of the difficult secondary tasks during the low-workload phase of flight. However, those pilots given a procedural preview showed the greatest benefits in overall flight performance. C1 SAN JOSE STATE UNIV,SAN JOSE,CA 95192. RP Andre, AD (reprint author), NASA,AMES RES CTR,WESTERN AEROSP LABS INC,MS 262-3,MOFFETT FIELD,CA 94035, USA. NR 22 TC 13 Z9 13 U1 1 U2 2 PU LAWRENCE ERLBAUM ASSOC INC PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430-2262 SN 1050-8414 J9 INT J AVIAT PSYCHOL JI Int. J. Aviat. Psychol. PY 1995 VL 5 IS 1 BP 5 EP 23 DI 10.1207/s15327108ijap0501_2 PG 19 WC Psychology, Applied SC Psychology GA TQ898 UT WOS:A1995TQ89800002 PM 11541496 ER PT J AU Laudeman, IV Palmer, EA AF Laudeman, IV Palmer, EA TI Quantitative measurement of observed workload in the analysis of aircrew performance SO INTERNATIONAL JOURNAL OF AVIATION PSYCHOLOGY LA English DT Article AB A methodology for the quantitative evaluation of observed workload was proposed. The model was designed to provide point estimations of observed workload at any time during the performance of a set of tasks. The model was also designed to provide information about the task-scheduling strategies used to complete a set of tasks. The proposed model was then tested with data from a full mission flight simulation. The model predictions correlated significantly with expert ratings of workload management made during the flight simulation. The model was also able to distinguish between low- and high-performing aircrews when performance was based on the number of errors made during flight simulations. C1 UNIV CALIF BERKELEY,BERKELEY,CA 94720. RP Laudeman, IV (reprint author), NASA,AMES RES CTR,MS-262,MOFFETT FIELD,CA 94036, USA. NR 2 TC 7 Z9 7 U1 1 U2 3 PU LAWRENCE ERLBAUM ASSOC INC PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430-2262 SN 1050-8414 J9 INT J AVIAT PSYCHOL JI Int. J. Aviat. Psychol. PY 1995 VL 5 IS 2 BP 187 EP 197 DI 10.1207/s15327108ijap0502_4 PG 11 WC Psychology, Applied SC Psychology GA TQ899 UT WOS:A1995TQ89900004 PM 11540256 ER PT J AU Chute, RD Wiener, EL AF Chute, RD Wiener, EL TI Cockpit-cabin communication .1. A tale of two cultures SO INTERNATIONAL JOURNAL OF AVIATION PSYCHOLOGY LA English DT Article AB Several dramatic accidents have emphasized certain deficiencies in cockpit-cabin coordination and communication. There are historical, organizational, environmental, psychosocial, and regulatory factors that have led to misunderstandings, problematic attitudes, and suboptimal interactions between the cockpit and cabin crews. Our research indicates the basic problem is that these two crews represent two distinct and separate cultures and that this separation serves to inhibit satisfactory teamwork. A survey was conducted at two airlines to measure attitudes of cockpit and cabin crews concerning the effectiveness of their communications. This article includes recommendations for the improvement of communications across the two cultures. C1 UNIV MIAMI,CORAL GABLES,FL 33124. RP Chute, RD (reprint author), SAN JOSE STATE UNIV,NASA,AMES RES CTR,MAIL STOP 262-4,MOFFETT FIELD,CA 94035, USA. FU NCI NIH HHS [NCA2-33] NR 13 TC 21 Z9 21 U1 0 U2 4 PU LAWRENCE ERLBAUM ASSOC INC PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430-2262 SN 1050-8414 J9 INT J AVIAT PSYCHOL JI Int. J. Aviat. Psychol. PY 1995 VL 5 IS 3 BP 257 EP 276 DI 10.1207/s15327108ijap0503_2 PG 20 WC Psychology, Applied SC Psychology GA TQ900 UT WOS:A1995TQ90000002 PM 11541916 ER PT J AU Morano, E Dervieux, A AF Morano, E Dervieux, A TI Steady relaxation methods for unstructured multigrid Euler and Navier-Stokes solutions SO INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS LA English DT Article DE Euler equations; Navier-Stokes equations transonic; laminar; unstructured grids; multigrid method; steady relaxation method ID EFFICIENT AB This study focuses on the unstructured-mesh multi-grid computation of two-dimensional, steady, transonic hows governed by the Euler or Navier-Stokes equations (in the laminar, low-Reynolds number regime). The central question is the construction of an algorithm of truly O(N) complexity for second-order accurate schemes. This is achieved either by the ''first-order/second-order'' Defect-Correction process, or directly by a fully ''second-order'' approach. Relations between levels are controlled by a coarsening method introduced by Guillard. This work attempts to follow the available theoretical facts to build several strategies that are then evaluated for a set of airfoil flows. C1 INRIA,F-06902 SOPHIA ANTIPOLIS,FRANCE. RP Morano, E (reprint author), NASA,LANGLEY RES CTR,ICASE,HAMPTON,VA 23665, USA. NR 39 TC 3 Z9 3 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 1061-8562 J9 INT J COMPUT FLUID D JI Int. J. Comput. Fluid Dyn. PY 1995 VL 5 IS 3-4 BP 137 EP 167 DI 10.1080/10618569508940740 PG 31 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA UD410 UT WOS:A1995UD41000001 ER PT J AU Scott, JR Chang, SC AF Scott, JR Chang, SC TI A new flux-conserving Newton scheme for the Navier-Stokes equations SO INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS LA English DT Article DE flux conservation; space-time; conservation element; solution element; Navier-Stokes equations; Newton's method; direct solver AB A new numerical method is developed for the two-dimensional, steady Navier-Stokes equations. Using local polynomial expansions to represent the discrete primitive variables on each cell, we construct a scheme which has the following properties: First, the local discrete primitive variables are functional solutions of both the integral and differential forms of the Navier-Stokes equations. Second, fluxes are balanced across cell interfaces using exact functional expressions (to the order of accuracy of the local expansions). No interpolation, flux models, or flux limiters are required. Third, local and global conservation of mass, momentum, and energy are explicitly provided for. Finally, the discrete primitive variables and their derivatives are treated in a unified and consistent manner. All are treated as unknowns to be solved together for simulating the local and global flux conservation. A general third-order formulation for the steady, compressible Navier-Stokes equations is presented. As a special case, the formulation is applied to incompressible flow, and a Newton's method scheme is developed for the solution of laminar channel flow. It is shown that, at Reynolds numbers of 100, 1000, and 2000, the developing channel flow boundary layer can be accurately resolved using as few as six to ten cells per channel width. RP Scott, JR (reprint author), NASA,LEWIS RES CTR,21000 BROOKPK RD,CLEVELAND,OH 44135, USA. NR 14 TC 1 Z9 1 U1 0 U2 1 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 1061-8562 J9 INT J COMPUT FLUID D JI Int. J. Comput. Fluid Dyn. PY 1995 VL 5 IS 3-4 BP 189 EP 212 DI 10.1080/10618569508940742 PG 24 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA UD410 UT WOS:A1995UD41000003 ER PT J AU JIANG, BN HOU, LJ LIN, TL POVINELLI, LA AF JIANG, BN HOU, LJ LIN, TL POVINELLI, LA TI LEAST-SQUARES FINITE-ELEMENT SOLUTIONS FOR 3-DIMENSIONAL BACKWARD-FACING STEP FLOW SO INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS LA English DT Article DE LEAST-SQUARES; FINITE ELEMENT METHOD; 3-DIMENSIONAL; BACKWARD-FACING STEP; INCOMPRESSIBLE; VISCOUS; JACOBI PRECONDITIONED CONJUGATE GRADIENT METHOD AB Comprehensive numerical solutions of the steady state incompressible viscous flow over a three-dimensional backward-facing step up to Re = 800 are presented*. The results are obtained by the least-squares finite element method (LSFEM) which is based on the velocity-pressure-vorticity formulation. The computed model is of the same size as that of Armaly's experiment. Three-dimensional phenomena are observed even at low Reynolds number. The calculated values of the primary reattachment length are in good agreement with experimental results. C1 LIVERMORE SOFTWARE TECHNOL CORP,LIVERMORE,CA 94550. NASA,LEWIS RES CTR,DIV INTERNAL FLUID MECH,CLEVELAND,OH 44135. RP JIANG, BN (reprint author), NASA,LEWIS RES CTR,INST COMPUTAT MECH PROP,CLEVELAND,OH 44135, USA. NR 8 TC 11 Z9 11 U1 0 U2 3 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 1061-8562 J9 INT J COMPUT FLUID D JI Int. J. Comput. Fluid Dyn. PY 1995 VL 4 IS 1-2 BP 1 EP 19 DI 10.1080/10618569508904515 PG 19 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA RK133 UT WOS:A1995RK13300001 ER PT J AU YEE, HC SWEBY, PK AF YEE, HC SWEBY, PK TI DYNAMICAL-APPROACH STUDY OF SPURIOUS STEADY-STATE NUMERICAL-SOLUTIONS OF NONLINEAR DIFFERENTIAL-EQUATIONS .2. GLOBAL ASYMPTOTIC-BEHAVIOR OF TIME DISCRETIZATIONS SO INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS LA English DT Article DE SPURIOUS STEADY-STATE NUMERICAL SOLUTIONS; SPURIOUS ASYMPTOTES; GLOBAL ASYMPTOTIC BEHAVIOR; NONLINEAR ODES; NUMERICAL METHODS; TIME DISCRETIZATIONS ID INERTIAL MANIFOLDS AB The global asymptotic nonlinear behavior of II explicit and implicit time discretizations for four 2 x 2 systems of first-order autonomous nonlinear ordinary differential equations (ODEs) is analyzed. The objectives are to gain a basic understanding of the difference in the dynamics of numerics between the scalars and systems of nonlinear autonomous ODEs and to set a baseline global asymptotic solution behavior of these schemes for practical computations in computational fluid dynamics. We show how ''numerical'' basins of attraction can complement the bifurcation diagrams in gaining more detailed global asymptotic behavior of time discretizations for nonlinear differential equations (DEs). We show how in the presence of spurious asymptotes the basins of the true stable steady states can be segmented by the basins of the spurious stable and unstable asymptotes. One major consequence of this phenomenon which is not commonly known is that this spurious behavior can result in a dramatic distortion and, in most cases, a dramatic shrinkage and segmentation of the basin of attraction of the true solution for finite time steps. Such distortion, shrinkage and segmentation of the numerical basins of attraction will occur regardless of the stability of the spurious asymptotes, and will occur for unconditionally stable implicit linear multistep methods. In other words, for the same (common) steady-state solution the associated basin of attraction of the DE might be very different from the discretized counterparts and the numerical basin of attraction can be very different from numerical method to numerical method. The results can be used as an explanation for possible causes of error, and slow convergence and nonconvergence of steady-state numerical solutions when using the time-dependent approach for nonlinear hyperbolic or parabolic PDEs. C1 UNIV READING,DEPT MATH,READING RG6 2AX,BERKS,ENGLAND. RP YEE, HC (reprint author), NASA,AMES RES CTR,DIV FLUID DYNAM,MOFFETT FIELD,CA 94035, USA. NR 46 TC 13 Z9 13 U1 0 U2 1 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 1061-8562 J9 INT J COMPUT FLUID D JI Int. J. Comput. Fluid Dyn. PY 1995 VL 4 IS 3-4 BP 219 EP & DI 10.1080/10618569508904525 PG 0 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA TA871 UT WOS:A1995TA87100002 ER PT J AU BAKES, CM GOLDBERG, FN AF BAKES, CM GOLDBERG, FN TI APPLICATIONS OF FIBER OPTIC NETWORKS IN HIGH-TECHNOLOGY RESEARCH SO INTERNATIONAL JOURNAL OF COMPUTER APPLICATIONS IN TECHNOLOGY LA English DT Article DE FIBER DISTRIBUTED DATA INTERFACE (FDDI); FIBER OPTIC NETWORK; LOCAL AREA NETWORK (LAN); SYNCHRONOUS OPTICAL NETWORK (SONET); TELECOMMUNICATIONS ID FDDI AB The NASA Lewis Research Center has active programmes in fluid dynamics and solid dynamics. These require a communications network capable of transporting multimedia traffic, including data, voice, interactive and non-interactive video, real-time visualization, and data gathering from scientific experiments. The use of powerful desktop workstations, which operate as standalone devices, work cooperatively in local clusters, operate in client server mode, access central computers, and address remote sites, also impacts on network requirements. This paper provides an overview of FDDI and SONET networks and investigates their roles in supporting high-level technological research. FDDI's topology, reliability, traffic classes, data encoding, token ring operation, timers, network management issues, and candidate applications are discussed. The multiplexing hierarchy, optical signal format, OAM capability, survivability, and candidate applications of SONET networks are explored. Interoperability issues, with the SDH international standard, ATM packet switching, and BISDN networks, are also addressed. C1 NASA,LEWIS RES CTR,TELECOMMUN & NETWORKING BRANCH,CLEVELAND,OH 44135. RP BAKES, CM (reprint author), KENT STATE UNIV,GRAD SCH MANAGEMENT,DEPT ADM SCI,KENT,OH 44242, USA. NR 25 TC 1 Z9 1 U1 0 U2 2 PU INDERSCIENCE ENTERPRISES LTD PI GENEVA AEROPORT PA WORLD TRADE CENTER BLDG 110 AVE LOUIS CASAI CP 306, CH-1215 GENEVA AEROPORT, SWITZERLAND SN 0952-8091 J9 INT J COMPUT APPL T JI Int. J. Comput. Appl. Technol. PY 1995 VL 8 IS 3-4 BP 172 EP 189 PG 18 WC Computer Science, Interdisciplinary Applications SC Computer Science GA TA187 UT WOS:A1995TA18700005 ER PT J AU Calomino, AM Ghosn, LJ AF Calomino, AM Ghosn, LJ TI Optimum notch configurations for the chevron-notched four-point bend specimens SO INTERNATIONAL JOURNAL OF FRACTURE LA English DT Article AB The failure sequence following crack formation in a chevron-notched four-point bend specimen is examined in a parametric study using the Bluhm slice synthesis model. Premature failure resulting from crack formation forces which exceed those required to propagate a crack beyond alpha(min) is examined together with the critical crack length and critical crack front length. An energy based approach is used to establish factors which forecast the tendency of such premature failure due to crack formation for any selected chevron-notched geometry. A comparative study reveals that, for constant values of alpha(1) and alpha(0), the dimensionless beam compliance and stress intensity factor are essentially independent of specimen width and thickness. The chevron tip position alpha(0) has its primary effect on the force required to initiate a sharp crack. Small values for alpha(0) maximize the stable region length, however, the premature failure tendency is also high for smaller alpha(0) values. Improvements in premature failure resistance can be realized for larger values of alpha(0) with only a minor reduction in the stable region length. The stable region length is also maximized for larger chevron base positions, alpha(1), but the chance for premature failure is also raised. Smaller base positions improve the premature failure resistance with only minor decreases in the stable region length. Chevron geometries having a good balance of premature failure resistance, stable region length, and crack front length are 0.20 less than or equal to alpha(0) less than or equal to 0.03 and 0.70 less than or equal to alpha(1) less than or equal to 0.80. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106. NR 8 TC 3 Z9 3 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0376-9429 J9 INT J FRACTURE JI Int. J. Fract. PY 1995 VL 72 IS 4 BP 311 EP 326 DI 10.1007/BF00040370 PG 16 WC Materials Science, Multidisciplinary; Mechanics SC Materials Science; Mechanics GA TM709 UT WOS:A1995TM70900002 ER PT J AU BINIENDA, WK ARNOLD, SM AF BINIENDA, WK ARNOLD, SM TI DRIVING-FORCE ANALYSIS IN AN INFINITE ANISOTROPIC PLATE WITH MULTIPLE CRACK INTERACTIONS SO INTERNATIONAL JOURNAL OF FRACTURE LA English DT Article AB The methodology and a rigorous solution formulation are presented for stress intensity factors (SIF's, k) and total strain energy release rates (SERR, G(T)) of a multicracked plate, that has fully interacting cracks and is subjected to a far-field arbitrary stress state. The fundamental perturbation problem is derived, and the steps needed to formulate the system of singular integral equations whose solution gives rise to the evaluation of the SIF's are identified. Parametric studies are conducted for two, three and four crack problems. The sensitivity and characteristics of the model is demonstrated. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RP BINIENDA, WK (reprint author), UNIV AKRON,DEPT CIVIL ENGN,AKRON,OH 44325, USA. NR 12 TC 8 Z9 9 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0376-9429 J9 INT J FRACTURE JI Int. J. Fract. PY 1995 VL 71 IS 3 BP 213 EP 245 DI 10.1007/BF00033720 PG 33 WC Materials Science, Multidisciplinary; Mechanics SC Materials Science; Mechanics GA RW300 UT WOS:A1995RW30000002 ER PT J AU SHORT, NM DICKENS, L AF SHORT, NM DICKENS, L TI AUTOMATIC-GENERATION OF PRODUCTS FROM TERABYTE-SIZE GEOGRAPHICAL INFORMATION-SYSTEMS USING PLANNING AND SCHEDULING SO INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SYSTEMS LA English DT Article ID AERIAL AB The growth of the remote sensing field has caused and explosion in the size and complexity of Earth satellite image databases. The explosion of data is already challenging current satellite-based GIS databases. New technologies for information managment will be required in the future to maintain these large geographically-oriented systems created by projects such as NASA's Earth Observing System (EOS). This paper presents a technology adapted from the planning/scheduling field in Artificial Intelligence (AI) that promises to automate and facilitate the process of creating and storing satellite images and their associated data products. C1 USRA,INTELLIGENT DATA MANAGEMENT PROJECT,GREENBELT,MD 20771. RP SHORT, NM (reprint author), NASA,GODDARD SPACE FLIGHT CTR,GSFC,INFORMAT SCI & TECHNOL BRANCH,GREENBELT,MD 20771, USA. NR 37 TC 1 Z9 1 U1 1 U2 2 PU TAYLOR & FRANCIS LTD LONDON PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0269-3798 J9 INT J GEOGR INF SYST JI Int. J. Georg. Inf. Syst. PD JAN-FEB PY 1995 VL 9 IS 1 BP 47 EP 65 DI 10.1080/02693799508902024 PG 19 WC Geography; Information Science & Library Science SC Geography; Information Science & Library Science GA QG184 UT WOS:A1995QG18400003 ER PT J AU Bernhard, RP Christiansen, EL Hyde, J Crews, JL AF Bernhard, RP Christiansen, EL Hyde, J Crews, JL TI Hypervelocity impact damage into space shuttle surfaces SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article; Proceedings Paper CT 1994 Hypervelocity Impact Symposium CY OCT 17-19, 1994 CL SANTA FE, NM AB When Orbiter Vehicles (OV) are placed in low-Earth orbit (LEO) the exposed surface is subjected to hypervelocity collision with small particles of meteoroids and man-made orbital debris (M&OD). The external shell of the orbiter is specifically designed to provide thermal protection against the extreme temperatures during launch, space exposure, and reentry. Abrasion to these surfaces by impacting hypervelocity particles is detrimental to their thermal properties, and often requires repair after return to Earth. In an effort to better understand the source of particulates in LEO, and their effects on spacecraft hardware, the analysis of residues at collision sites by means of Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray analysis (EDX) was conducted to determine the nature of such particles. Based upon the bulk composition of these residues, we have made a preliminary discrimination between micrometeoroid and space debris-containing impact features. The data on projectile composition, source, and resulting target damage is useful in estimating impactor density, velocity, and size. C1 LOCKHEED ENGN & SCI CO,HOUSTON,TX 77058. RP Bernhard, RP (reprint author), NASA,LYNDON B JOHNSON SPACE CTR,HOUSTON,TX 77058, USA. NR 12 TC 13 Z9 14 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1995 VL 17 IS 1-3 BP 57 EP 68 DI 10.1016/0734-743X(95)99835-F PN 1 PG 12 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA TK747 UT WOS:A1995TK74700010 ER PT J AU Bernhard, RP Horz, F AF Bernhard, RP Horz, F TI Craters in aluminum 1100 by soda-lime glass spheres at 1 to 7 km/s SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article; Proceedings Paper CT 1994 Hypervelocity Impact Symposium CY OCT 17-19, 1994 CL SANTA FE, NM AB To assist in the interpretation of crater populations on space-exposed surfaces from the Solar Maximum Satellite and the Long Duration Exposure Facility (LDEF), we conducted laboratory simulations of cosmic-dust impacts into aluminum 1100 targets with similar to 3.2 mm diameter soda-lime projectiles at velocities (V) between 0.7 to 7 km/s. The resulting crater diameters (D-C) conform to current cratering equations, while crater depths (Pc) are somewhat deeper, yielding typical P-C/D-C ratios of similar to 0.58 at V > 6 km/s. Similar values (P-C/D-C > 0.55) are found for craters in aluminum surfaces retrieved from the Long Duration Exposure Facility, which were produced at impact velocities as high as 20 km/s. The value of P-C/D-C = 0.5 that is being used by many should be abandoned; a P-C/D-C = 0.58 is recommended. Similarly, we demonstrate that mass loss of the target, as determined by pre- and post-shot weight measurements; can be almost an order of magnitude less than mass losses that would be inferred from crater-volume measurements. This difference is due to substantial internal deformation of the target which permits large volumes of material to be deformed, and displaced without physical ejection and dislodgment. In addition, this study traces the behavior of the glass impactor. At V < 1.5 km/s a complexly deformed and sheared projectile resides within the crater cavity. The first projectile melts appear at similar to 2.2 km/s, and mixtures of melt and debris start creeping up the crater walls at > 2.5 km/s. The radially expanding melts develop, by geometric dispersion, into thin films that tear, leaving a discontinuous melt deposit upon cooling. At V > 5.5 km/s the entire impactor is essentially molten; however, small quantities of unmelted residues still can be found at 7 km/s. Increasingly larger fractions of melt escape the crater between 5 and 7 km/s. Only modestly higher velocities would be needed to have the entire projectile escape the crater. This appears to be the case for similar to 50% of all LDEF craters which lack detectable residues at sensitivity revels of Scanning Electron Microscopy - Energy Dispersive X-Ray analysis. C1 NASA,LYNDON B JOHNSON SPACE CTR,HOUSTON,TX 77058. RP Bernhard, RP (reprint author), LOCKHEED ENGN & SCI CO,2400 NASA RD 1,HOUSTON,TX 77058, USA. NR 25 TC 25 Z9 25 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1995 VL 17 IS 1-3 BP 69 EP 80 DI 10.1016/0734-743X(95)99836-G PN 1 PG 12 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA TK747 UT WOS:A1995TK74700011 ER PT J AU Bogdanoff, DW Miller, RJ AF Bogdanoff, DW Miller, RJ TI Improving the performance of two-stage gas guns by adding a diaphragm in the pump tube SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article; Proceedings Paper CT 1994 Hypervelocity Impact Symposium CY OCT 17-19, 1994 CL SANTA FE, NM AB Herein, we study the technique of improving the gun performance by installing a diaphragm in the pump tube of the gun. A CFD study is carried out for the 0.28 in. gun in the Hypervelocity Free Flight Radiation (HFF RAD) range at the NASA Ames Research Center. The normal, full-length pump tube is studied as well as two pump tubes of reduced length (similar to 75% and similar to 33% of the normal length). Significant improvements in performance are calculated to be gained for the reduced length pump tubes upon the addition of the diaphragm. These improvements are identified as reductions in maximum pressures in the pump tube and at the projectile base of similar to 20%, while maintaining the projectile muzzle velocity or as increases in muzzle velocity of similar to 0.5 km/sec while not increasing the maximum pressures in the gun. Also, it is found that both guns with reduced pump tube length (with diaphragms) could maintain the performance of gun with the full length pump tube without diaphragms, whereas the guns with reduced pump tube lengths without diaphragms could not. A five-shot experimental investigation of the pump tube diaphragm technique is carried out for the gun with a pump tube length of 75% normal. The CFD predictions of increased muzzle velocity are borne out by the experimental data. Modest, but useful muzzle velocity increases (2.5-6%) are obtained upon the installation of a diaphragm, compared to a benchmark shot without a diaphragm. RP Bogdanoff, DW (reprint author), NASA,AMES RES CTR,INST THERMOSCI,MAIL STOP 230-2,MOFFETT FIELD,CA 94035, USA. NR 3 TC 10 Z9 12 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1995 VL 17 IS 1-3 BP 81 EP 92 DI 10.1016/0734-743X(95)99837-H PN 1 PG 12 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA TK747 UT WOS:A1995TK74700012 ER PT J AU Christiansen, EL Crews, JL Kerr, JH CourPalais, BG Cykowski, E AF Christiansen, EL Crews, JL Kerr, JH CourPalais, BG Cykowski, E TI Testing the validity of cadmium scaling SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article; Proceedings Paper CT 1994 Hypervelocity Impact Symposium CY OCT 17-19, 1994 CL SANTA FE, NM ID DEBRIS AB Tests and analysis at the NASA Johnson Space Center (JSC) Hypervelocity Impact Test Facility, HIT-F (formerly HIRL) have been conducted to investigate the validity of using cadmium-on-cadmium (Cd on Cd) impact tests to simulate the effects of aluminum-on-aluminum (Al on Al) impacts on Whipple and double-bumper shields at normal and oblique angles. A 3.1 velocity-scaling factor has been proposed recently by Schmidt et al. [1] as the ratio between the simulated velocity of aluminum impacts to the actual impact velocity of cadmium tests based on an assessment of physical and thermodynamic material properties of Cd and Al and dimensional analysis. Using the 3.1 velocity-scaling factor, the recent HIT-F impact data indicated that the Cd simulations over-predicted penetration damage to Whipple shields with short standoffs (spacing to projectile diameter, S/d, ratio of less than 15) compared to corresponding Al tests at constant scaled velocity (similar to 7 km/sec) and normal (0 degrees) impacts. For larger standoff Whipple shields (S/d > 20) and tests at oblique angles (30 degrees to 65 degrees), the Cd simulations under-predict the penetration of shielding rearwalls. In some cases, the ''critical diameter'' of the projectiles at the ballistic limit of a shield differed by 25% between aluminum baseline tests and cadmium scaling tests. This data provides evidence that the Cd velocity-scaling factor is not a constant 3.1 ratio for all types of Whipple shields, but likely varies as a function of Whipple shield parameters (spacing, bumper thickness, etc.) and impact conditions (impact angle, velocity, etc.). C1 SW RES INST,SAN ANTONIO,TX 78228. LOCKHEED ENGN & SCI CO,HOUSTON,TX 77058. RP Christiansen, EL (reprint author), NASA,LYNDON B JOHNSON SPACE CTR,MAIL CODE SN3,HOUSTON,TX 77058, USA. NR 15 TC 3 Z9 3 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1995 VL 17 IS 1-3 BP 205 EP 215 DI 10.1016/0734-743X(95)99847-K PN 1 PG 11 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA TK747 UT WOS:A1995TK74700022 ER PT J AU Christiansen, EL Crews, JL Williamsen, JE Robinson, JH Nolen, AM AF Christiansen, EL Crews, JL Williamsen, JE Robinson, JH Nolen, AM TI Enhanced meteoroid and orbital debris shielding SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article; Proceedings Paper CT 1994 Hypervelocity Impact Symposium CY OCT 17-19, 1994 CL SANTA FE, NM ID SPACECRAFT AB An innovative, low-weight shield system has been developed by NASA Johnson Space Center (JSC) and Marshall Space Flight Center (MSFC) engineers to enhance the protection of conventional Whipple shields. This shield, the ''Stuffed Whipple'' shield, includes a flexible blanket combining Nextel(TM) ceramic fabric and Kevlar(TM) fabric (or ''stuffing'') between the aluminum bumper and rear wall of a Whipple shield. The Stuffed Whipple (SW) shield is particularly effective if shield standoffs are short (i.e., shield spacing to projectile diameter ratios of 15 or less). Alternative shields using aluminum, Nextel(TM) or Kevlar(TM) alone as the intermediate bumper were tested but did not provide the same level of protection performance for the weight as a combination of Nextel(TM) and Kevlar(TM). Hypervelocity impact (HVI) testing with greater than Ig aluminum projectiles using Light-Gas Guns (LGG) up to similar to 7 km/sec and Shaped-Charge Launchers (SCL) up to similar to 11 km/sec were used in the development program. C1 NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812. RP Christiansen, EL (reprint author), NASA,LYNDON B JOHNSON SPACE CTR,HOUSTON,TX 77058, USA. NR 13 TC 58 Z9 81 U1 0 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1995 VL 17 IS 1-3 BP 217 EP 228 DI 10.1016/0734-743X(95)99848-L PN 1 PG 12 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA TK747 UT WOS:A1995TK74700023 ER PT J AU Horz, F Cintala, MJ Bernhard, RP See, TH AF Horz, F Cintala, MJ Bernhard, RP See, TH TI Cratering and penetration experiments in Teflon targets at velocities from 1 to 7 km/s SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article; Proceedings Paper CT 1994 Hypervelocity Impact Symposium CY OCT 17-19, 1994 CL SANTA FE, NM ID SPACE; SIMULATION AB We conducted impact experiments into Teflon(FEP) targets of widely variable thickness to assist in the interpretation of craters and penetration holes in the similar to 20 m(2) of thermal blankets that were exposed for 5.7 years in low-Earth orbit by the Long Duration Exposure Facility(LDEF). Soda-lime glass spheres of similar to 3.2 mm diameter (D-p) were used as projectiles ranging in impact velocities (V) from similar to 1 to 7 km/s. Teflon fails in a largely brittle fashion; substantial spall zones were developed at the target's front side, and especially at the rear side, if penetrated. Crater diameter (D-c) varies with V-0.74. Penetration-hole diameter (D-h) depends on specific target thickness (T) and can be larger than D-c over a limited range of T(0.5 > D-p/T < 1.0), because rear-spallation processes intersect the target's front at radial ranges larger than D-c. D-h becomes smaller than D-c at relative target thicknesses of D-p/T. 1, and systematically decreases as T decreases to eventually approach the condition were D-h = D-p at D-p/T > 100. D-h also increases with increasing V, yet the rate of increase depends on T, yielding a wide variety of velocity exponents that depend on D-p/T. The velocity exponent is highest for massive targets and decreases with decreasing T to approach the condition of D-h = D-p at D-p/T > 100, regardless of the velocity. The relationships of D-h, T and V are sufficiently systematic that unique solutions for projectile dimensions are possible from the diameter measurement of any penetration hole in teflon targets of any thickness. This renders the ''calibration'' of individual penetration holes equivalent to that of individual impact craters. Thus, improved analysis of literally thousands of penetration holes and craters in the LDEF thermal blankets seems possible. C1 LOCKHEED ENGN & SCI CO,HOUSTON,TX 77058. RP Horz, F (reprint author), NASA,LYNDON B JOHNSON SPACE CTR,HOUSTON,TX 77058, USA. NR 23 TC 8 Z9 8 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1995 VL 17 IS 1-3 BP 419 EP 430 DI 10.1016/0734-743X(95)99867-Q PN 1 PG 12 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA TK747 UT WOS:A1995TK74700042 ER PT J AU Horz, F Cintala, MJ Bernhard, RP See, TH AF Horz, F Cintala, MJ Bernhard, RP See, TH TI Multiple-mesh bumpers: A feasibility study SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article; Proceedings Paper CT 1994 Hypervelocity Impact Symposium CY OCT 17-19, 1994 CL SANTA FE, NM ID DEBRIS CLOUD EXPANSION; SHIELDS; IMPACT AB Discontinuous targets (meshes and grids) offer significant mass savings, on geometric grounds, relative to the continuous materials that are typically employed in collisional bumper designs. Laboratory experiments were conducted to compare single aluminum and multiple-mesh systems to those composed of continuous membranes for the ability to disrupt, disperse, and decelerate soda-lime glass and aluminum projectiles at velocities ranging from 1-6 km/s. Material thickness, mesh size and the number of bumper elements were systematically varied, resulting in specific areal masses of 0.016 to 1.6 g/cm(2) for the total bumper. Damage to individual target elements and to witness plates were used to characterize the performance of specific test articles. C1 LOCKHEED ENGN & SCI CO,HOUSTON,TX 77058. RP Horz, F (reprint author), NASA,LYNDON B JOHNSON SPACE CTR,HOUSTON,TX 77058, USA. NR 16 TC 16 Z9 27 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1995 VL 17 IS 1-3 BP 431 EP 442 DI 10.1016/0734-743X(95)99868-R PN 1 PG 12 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA TK747 UT WOS:A1995TK74700043 ER PT J AU Lazaroff, SM Fukushima, J AF Lazaroff, SM Fukushima, J TI Hypervelocity impact testing of the utility distribution system for the space station freedom SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article; Proceedings Paper CT 1994 Symposium on Hypervelocity Impact CY OCT 17-19, 1994 CL SANTA FE, NM AB The Utility Distribution System (UDS) of the Space Station Freedom (SSF) is responsible for routing avionic harnesses and fluid line utilities along the pre-integrated truss segments. These harnesses and lines are housed in a rectangular aluminum carrier that provides a functional level of protection from the impacts of meteoroid and orbital debris (M/OD) particles. An analysis completed by McDonnell Douglas Corporation-Space Station Division (MDC-SSD) estimated that the avionics and fluid utilities in the UDS carrier could experience approximately 5600 failures over the 30 year life of the SSF--of which only 2 were failures of fluid lines. This large number was based mostly on a very conservative avionic conductor failure criteria that had to be used because little is known about the affects of M/OD on avionic conductors, especially behind a protective carrier cover. As a result, a two-phase joint NASA-Johnson Space Center (JSC) and MDC-SSD hypervelocity impact (HVI) test program was initiated. From this test program, it was determined that the expected number of M/OD impacts that would cause an avionic conductor/cable failure is 28 over a 30 year period. For the fluid lines, the data indicate the number of predicted fluid line failures increased slightly from the initial analysis to as many as 15 for the entire 30 year life of SSF. C1 MCDONNELL DOUGLAS AEROSP W,HUNTINGTON BEACH,CA 92647. RP Lazaroff, SM (reprint author), NASA,LYNDON B JOHNSON SPACE CTR,M-C EP5,HOUSTON,TX 77058, USA. NR 11 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 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1995 VL 17 IS 4-6 BP 497 EP 508 DI 10.1016/0734-743X(95)99874-Q PN 2 PG 12 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA TK748 UT WOS:A1995TK74800004 ER PT J AU Robinson, JH Nolen, AM AF Robinson, JH Nolen, AM TI An investigation of metal matrix composites as shields for hypervelocity orbital debris impacts SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article; Proceedings Paper CT 1994 Symposium on Hypervelocity Impact CY OCT 17-19, 1994 CL SANTA FE, NM ID DESIGN AB The improvement of space vehicle shield designs to resist penetration by hypervelocity impacts of meteoroids or man-made orbital debris can lengthen mission life and increase mission efficiency. One option to improve shields is to create new bumper materials which can be tailored to meet the requirements for effective shielding. Metal matrix composites are one such material. Fiber content, type, and orientation could be varied to tailor the material to the specific properties needed for weight efficient shielding. In this study, two varieties of aluminum matrix composites were investigated, one with continuous graphite fibers and one with silicon carbide particulates. The objectives of the study were: to compare the penetration resistance of the composite with the known resistance of aluminum; to study the penetration mechanics by comparing the condition of the composite after the impact test with the pre-test condition; to study the effects of fiber content and fiber orientation on penetration resistance; and to recommend a material ''design'' for metal matrix composites which would best protect a space vehicle from orbital debris. The composite bumpers did not perform significantly better than aluminum bumpers. The particulate composites are more effective bumpers than the continuous fiber composites for the conditions tested. The differences in the measured hole diameters resulting from the impact tests as compared to predicted hole diameters for the particulate composite bumpers, are within the expected differences for metallics. However, the continuous fiber composites had much larger holes than predicted. RP Robinson, JH (reprint author), NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,HUNTSVILLE,AL 35812, USA. NR 13 TC 23 Z9 23 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1995 VL 17 IS 4-6 BP 685 EP 696 DI 10.1016/0734-743X(95)99891-T PN 2 PG 12 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA TK748 UT WOS:A1995TK74800021 ER PT J AU MCGRATH, WR WELLER, TM KATEHI, LPB AF MCGRATH, WR WELLER, TM KATEHI, LPB TI A NOVEL NONCONTACTING WAVE-GUIDE BACKSHORT FOR SUBMILLIMETER-WAVE FREQUENCIES SO INTERNATIONAL JOURNAL OF INFRARED AND MILLIMETER WAVES LA English DT Article DE SUBMILLIMETER WAVE; WAVE-GUIDE; BACKSHORT; TUNING ELEMENT AB A novel noncontacting waveguide backshort has been developed for millimeter wave and submillimeter wave frequencies. It employs a metallic bar with rectangular or circular holes. The size and spacing of the holes are adjusted to provide a periodic variation of the guide impedance on the correct length scale to give a large reflection of rf power. This design is mechanically rugged and can be readily fabricated for high submillimeter wave frequencies where conventional backshorts are difficult or impossible to fabricate. Model experiments have been performed at 4 GHz - 6 GHz to empirically optimize the design parameters. Values of reflected power greater than 95% over a 30% bandwidth have been achieved. A specific design is presented which has also been successfully scaled to WR-10 band (75 GHz - 110 GHz). A theoretical analysis is compared to the experiments and found to agree well with the measured data. C1 UNIV MICHIGAN,RADIAT LAB,ANN ARBOR,MI 48109. RP MCGRATH, WR (reprint author), CALTECH,JET PROP LAB,CTR SPACE MICROELECTR TECHNOL,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 10 TC 10 Z9 10 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0195-9271 J9 INT J INFRARED MILLI JI Int. J. Infrared Millimeter Waves PD JAN PY 1995 VL 16 IS 1 BP 237 EP 256 DI 10.1007/BF02085860 PG 20 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA QE094 UT WOS:A1995QE09400016 ER PT J AU SCHMIDT, JA BREIT, GA BORGSTROM, P INTAGLIETTA, M AF SCHMIDT, JA BREIT, GA BORGSTROM, P INTAGLIETTA, M TI INDUCED PERIODIC HEMODYNAMICS IN SKELETAL-MUSCLE OF ANESTHETIZED RABBITS, STUDIED WITH MULTIPLE LASER-DOPPLER FLOW PROBES SO INTERNATIONAL JOURNAL OF MICROCIRCULATION-CLINICAL AND EXPERIMENTAL LA English DT Article DE VASOMOTION; FLOWMOTION; LASER DOPPLER FLOWMETRY; SKELETAL MUSCLE; ARTERIOLES; RABBITS ID SLOW-WAVE FLOWMOTION; ARTERIAL-PRESSURE; BLOOD-FLOW; OSCILLATIONS; VASOMOTION; BIFURCATIONS AB Periodic fluctuations, regular slow-wave flowmotion, were induced in the skeletal muscle of six mature anesthetized New Zealand White rabbits by acute femoral artery pressure reduction from a median control value of 78 to 36 mm Hg. This phenomenon was monitored simultaneously with four laser Doppler flowmetry (LDF) probes placed over the gastrocnemius muscle in a linear array with a spacing of 5 mm. The median relative peak-to-trough amplitude of the oscillatory flow patterns was 47%, white a frequency of approximately 2.5 cycles per minute (cpm), which remained relatively stable over an observation period of 1 h (+/- 15-20%). Application of two frequency analysis methods, Welch's FFT method and Prony Spectral Line Estimation yielded similar results and showed a correlation coefficient of r = + 0.84. Spectral coherence between pairs of regular slow-wave flowmotion records decreased with increasing probe separation (0.28 at 5 mm; 0.01 at 15 mm). However, patterns of frequency fluctuation over time were significantly correlated between concurrent record pairs regardless of probe separation. These results suggest that the regular slow-wave flowmotion signal originates in regions that are independently regulated by local vasoactive sites, which may be called pacemakers. These sites may also be influenced by an additional common control mechanism, which may be myogenic/metabolic or central in nature. C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. UNIV CALIF SAN DIEGO,DEPT APPL MECH & ENGN SCI BIOENGN,LA JOLLA,CA 92093. RP SCHMIDT, JA (reprint author), UNIV MARBURG,MED POLIKLIN,DEPT MED,BALDINGERSTR,D-35033 MARBURG,GERMANY. FU NHLBI NIH HHS [HL 17421] NR 25 TC 8 Z9 8 U1 0 U2 0 PU KARGER PI BASEL PA ALLSCHWILERSTRASSE 10, CH-4009 BASEL, SWITZERLAND SN 0167-6865 J9 INT J MICROCIRC JI Int. J. Microcirc.-Clin. Exp. PD JAN-FEB PY 1995 VL 15 IS 1 BP 28 EP 36 DI 10.1159/000178946 PG 9 WC Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA RG894 UT WOS:A1995RG89400005 PM 7558623 ER PT J AU VISSCHER, L DYALL, KG LEE, TJ AF VISSCHER, L DYALL, KG LEE, TJ TI KRAMERS-RESTRICTED CLOSED-SHELL CCSD THEORY SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY LA English DT Article ID MOLECULAR CALCULATIONS; ELECTRONIC-STRUCTURE; INCLUSION; HYDRIDES; ATOMS AB A Kramers-restricted version of the closed-shell coupled cluster singles and doubles theory is presented. The theory can be used in conjunction with two- or four-component relativistic reference wave functions, where the intrinsic treatment of the spin-orbit coupling gives rise to a maximum of eight times more independent quantities (amplitudes and integrals) than found in a spin-independent formalism. The number of operations required to evaluate the equations is at most 32 times larger than in the optimal spin-independent closed-shell formalism, which is eight times smaller than found when using a spin-dependent unrestricted formalism. (C) John Wiley & Sons, Inc. RP VISSCHER, L (reprint author), NASA, AMES RES CTR, MS 230-3, MOFFETT FIELD, CA 94035 USA. RI Visscher, Lucas/A-3523-2010; Lee, Timothy/K-2838-2012 OI Visscher, Lucas/0000-0002-7748-6243; NR 30 TC 74 Z9 74 U1 0 U2 5 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0020-7608 J9 INT J QUANTUM CHEM JI Int. J. Quantum Chem. PY 1995 SU 29 BP 411 EP 419 PG 9 WC Chemistry, Physical; Mathematics, Interdisciplinary Applications; Physics, Atomic, Molecular & Chemical SC Chemistry; Mathematics; Physics GA TJ793 UT WOS:A1995TJ79300042 ER PT J AU THIESSEN, DB MAN, KF AF THIESSEN, DB MAN, KF TI A QUASI-CONTAINERLESS PENDANT DROP METHOD FOR SURFACE-TENSION MEASUREMENTS ON MOLTEN METALS AND ALLOYS SO INTERNATIONAL JOURNAL OF THERMOPHYSICS LA English DT Article; Proceedings Paper CT 12th Symposium on Thermophysical Properties CY JUN 19-24, 1994 CL UNIV COLORADO, BOULDER, CO SP NIST, Chem Sci & Technol Lab, Thermophys Div, Amer Soc Mech Engineers, Heat Transfer Div, Comm Thermophys Properties HO UNIV COLORADO DE DIGITAL IMAGE ANALYSIS; ELECTRON BEAM MELTING; HIGH TEMPERATURE; LIQUID METALS AND ALLOYS; PENDANT DROP METHOD; SURFACE TENSION ID LIQUID-METALS AB A quasi-containerless pendant drop method For measuring the surface tension of molten metals and alloys is being developed. The technique involves melting the end of a high-purity metal rod by bombardment with an electron beam to form a pendant drop under ultra-high-vacuum conditions to minimize surface contamination. The magnified image of the drop is captured from a high-resolution CCD camera. The digitized image of the drop is then analyzed to compute the surface tension. A computer program has been developed that reads the pixel intensities from a graphics file containing the digital image. The code searches for the edge of the drop along rows and columns of pixels and stores the edge coordinates in an array. It then computes an optimized theoretical drop shape by solving the Young-Laplace differential equation from which the quantity of surface tension is deduced. This technique has been demonstrated with the surface tension measurement of molten zirconium metal. C1 CALTECH,JET PROP LAB,MICROGRAV RES GRP,PASADENA,CA 91109. RI Thiessen, David/A-2731-2011 NR 13 TC 5 Z9 5 U1 0 U2 7 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0195-928X J9 INT J THERMOPHYS JI Int. J. Thermophys. PD JAN PY 1995 VL 16 IS 1 BP 245 EP 255 DI 10.1007/BF01438975 PG 11 WC Thermodynamics; Chemistry, Physical; Mechanics; Physics, Applied SC Thermodynamics; Chemistry; Mechanics; Physics GA QR999 UT WOS:A1995QR99900024 ER PT J AU NELSON, ML GOTTLICH, GL BIANCO, DJ PAULSON, SS BINKLEY, RL KELLOGG, YD BEAUMONT, CJ SCHMUNK, RB KURTZ, MJ ACCOMAZZI, A SYED, O AF NELSON, ML GOTTLICH, GL BIANCO, DJ PAULSON, SS BINKLEY, RL KELLOGG, YD BEAUMONT, CJ SCHMUNK, RB KURTZ, MJ ACCOMAZZI, A SYED, O TI THE NASA TECHNICAL REPORT SERVER SO INTERNET RESEARCH-ELECTRONIC NETWORKING APPLICATIONS AND POLICY LA English DT Article DE AEROSPACE INDUSTRY; ELECTRONIC PUBLISHING; INFORMATION SERVICES; INTERNET AB The National Aeronautics and Space Act of 1958 established the National Aeronautics and Space Administration (NASA) and charged it to ''provide for the widest practicable and appropriate dissemination of information concerning.;.:its activities and the results thereof''. The search for innovative methods to distribute NASA's information led a grass-roots team to create the NASA Technical Report Server (NTRS), which uses the World Wide Web and other popular Internet-based information systems. C1 NASA,DRYDEN FLIGHT RES CTR,EDWARDS AFB,CA. NASA,GODDARD INST SPACE STUDIES,NATL RES COUNCIL,NEW YORK,NY. SMITHSONIAN ASTROPHYS OBSERV,CAMBRIDGE,MA. NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RP NELSON, ML (reprint author), NASA,LANGLEY RES CTR,COMP SCI CORP,HAMPTON,VA 23665, USA. RI KURTZ, Michael /B-3890-2009; OI Kurtz, Michael/0000-0002-6949-0090; Accomazzi, Alberto/0000-0002-4110-3511; Nelson, Michael/0000-0003-3749-8116 NR 18 TC 9 Z9 9 U1 0 U2 2 PU MCB UNIV PRESS LTD PI BRADFORD PA 60/62 TOLLER LANE, BRADFORD, W YORKSHIRE, ENGLAND BD8 9BY SN 1066-2243 J9 INTERNET RES JI Internet Res.-Electron. Netw. Appl. Policy PY 1995 VL 5 IS 2 BP 25 EP & DI 10.1108/10662249510094768 PG 0 WC Business; Computer Science, Information Systems; Telecommunications SC Business & Economics; Computer Science; Telecommunications GA TB823 UT WOS:A1995TB82300003 ER PT J AU CLARK, A AF CLARK, A TI NEW NASA LAUNCH SO INTERNET WORLD LA English DT Letter RP CLARK, A (reprint author), NASA,WASHINGTON,DC 20546, USA. NR 0 TC 6 Z9 6 U1 0 U2 0 PU MECKLERMEDIA CORP PI WESTPORT PA 20 KETCHUM ST, WESTPORT, CT 06880 SN 1064-3923 J9 INTERNET WORLD JI Internet World PD JAN PY 1995 VL 6 IS 1 BP 6 EP 6 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA RM527 UT WOS:A1995RM52700002 ER PT B AU VOLPE, R LITWIN, T MATTHIES, L AF VOLPE, R LITWIN, T MATTHIES, L BE Ikeuchi, K Khosla, P TI Mobile robot localization by remote viewing of a colored cylinder SO IROS '95 - 1995 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS: HUMAN ROBOT INTERACTION AND COOPERATIVE ROBOTS, PROCEEDINGS, VOL 1 LA English DT Proceedings Paper CT 1995 IEEE/RSJ International Conference on Intelligent Robots and Systems - Human Robot Interaction and Cooperative Robots CY AUG 05-09, 1995 CL PITTSBURGH, PA SP IEEE, Ind Electr Soc, IEEE, Robot & Automat Soc, Robot Soc Japan, Soc Instrument & Control Engineers, New Technol Fdn C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 3 Z9 4 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-7803-3006-4 PY 1995 BP 257 EP 263 PG 7 WC Automation & Control Systems; Computer Science, Cybernetics; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Automation & Control Systems; Computer Science; Engineering; Instruments & Instrumentation GA BE13J UT WOS:A1995BE13J00039 ER PT B AU MATTHIES, L GAT, E HARRISON, R WILCOX, B VOLPE, R LITWIN, T AF MATTHIES, L GAT, E HARRISON, R WILCOX, B VOLPE, R LITWIN, T BE Ikeuchi, K Khosla, P TI Mars microrover navigation: Performance evaluation and enhancement SO IROS '95 - 1995 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS: HUMAN ROBOT INTERACTION AND COOPERATIVE ROBOTS, PROCEEDINGS, VOL 1 LA English DT Proceedings Paper CT 1995 IEEE/RSJ International Conference on Intelligent Robots and Systems - Human Robot Interaction and Cooperative Robots CY AUG 05-09, 1995 CL PITTSBURGH, PA SP IEEE, Ind Electr Soc, IEEE, Robot & Automat Soc, Robot Soc Japan, Soc Instrument & Control Engineers, New Technol Fdn C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 9 Z9 9 U1 2 U2 2 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-7803-3006-4 PY 1995 BP 433 EP 440 PG 8 WC Automation & Control Systems; Computer Science, Cybernetics; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Automation & Control Systems; Computer Science; Engineering; Instruments & Instrumentation GA BE13J UT WOS:A1995BE13J00066 ER PT B AU LEE, SH ZHAO, XM AF LEE, SH ZHAO, XM BE Ikeuchi, K Khosla, P TI A new sensor planning paradigm and its application to robot self-localization SO IROS '95 - 1995 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS: HUMAN ROBOT INTERACTION AND COOPERATIVE ROBOTS, PROCEEDINGS, VOL 2 LA English DT Proceedings Paper CT 1995 IEEE/RSJ International Conference on Intelligent Robots and Systems - Human Robot Interaction and Cooperative Robots CY AUG 05-09, 1995 CL PITTSBURGH, PA SP IEEE, Ind Electr Soc, IEEE, Robot & Automat Soc, Robot Soc Japan, Soc Instrument & Control Engineers, New Technol Fdn C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-7803-3006-4 PY 1995 BP 462 EP 467 PG 6 WC Automation & Control Systems; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Automation & Control Systems; Engineering; Instruments & Instrumentation GA BE13K UT WOS:A1995BE13K00072 ER PT B AU BEJCZY, AK KIM, WS AF BEJCZY, AK KIM, WS BE Ikeuchi, K Khosla, P TI Sensor fusion in telerobotic task controls SO IROS '95 - 1995 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS: HUMAN ROBOT INTERACTION AND COOPERATIVE ROBOTS, PROCEEDINGS, VOL 3 LA English DT Proceedings Paper CT 1995 IEEE/RSJ International Conference on Intelligent Robots and Systems - Human Robot Interaction and Cooperative Robots CY AUG 05-09, 1995 CL PITTSBURGH, PA SP IEEE, Ind Electr Soc, IEEE, Robot & Automat Soc, Robot Soc Japan, Soc Instrument & Control Engineers, New Technol Fdn C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-7803-3006-4 PY 1995 BP 241 EP 249 PG 9 WC Automation & Control Systems; Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Automation & Control Systems; Computer Science; Engineering; Instruments & Instrumentation GA BE13L UT WOS:A1995BE13L00039 ER PT B AU LEE, S YI, C AF LEE, S YI, C BE Ikeuchi, K Khosla, P TI Evaluation of assemblability based on statistical analysis of tolerance propagation SO IROS '95 - 1995 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS: HUMAN ROBOT INTERACTION AND COOPERATIVE ROBOTS, PROCEEDINGS, VOL 3 LA English DT Proceedings Paper CT 1995 IEEE/RSJ International Conference on Intelligent Robots and Systems - Human Robot Interaction and Cooperative Robots CY AUG 05-09, 1995 CL PITTSBURGH, PA SP IEEE, Ind Electr Soc, IEEE, Robot & Automat Soc, Robot Soc Japan, Soc Instrument & Control Engineers, New Technol Fdn C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. 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 0-7803-3006-4 PY 1995 BP 256 EP 261 PG 6 WC Automation & Control Systems; Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Automation & Control Systems; Computer Science; Engineering; Instruments & Instrumentation GA BE13L UT WOS:A1995BE13L00041 ER PT J AU GLICKSMAN, ME KOSS, MB BUSHNELL, LT LACOMBE, JC WINSA, EA AF GLICKSMAN, ME KOSS, MB BUSHNELL, LT LACOMBE, JC WINSA, EA TI DENDRITIC GROWTH OF SUCCINONITRILE IN TERRESTRIAL AND MICROGRAVITY CONDITIONS AS A TEST OF THEORY SO ISIJ INTERNATIONAL LA English DT Article DE DENDRITE; MICROGRAVITY; IVANTSOV; CONVECTION ID CONVECTION AB Dendritic growth is the common mode of solidification encountered when metals and alloys freeze under low thermal gradients. The growth of dendrites in pure melts is generally acknowledged to be controlled by the transport of latent heat from the moving crystal-melt interface into its supercooled melt. The Ivantsov formulation solves the equation of heat flow from a paraboloidal dendrite tip for the case of diffusive heat transport. However, this formulation is incomplete, and the physics of an additional selection rule, coupled to the Ivantsov solution, is necessary to predict the dendrite tip velocity and radius of curvature as a unique function of the supercooling. Unfortunately, the experimental evidence is not definitive because dendritic growth can be complicated by buoyancy-induced convection, which is normally unavoidable under terrestrial conditions. Recent experiments performed in the microgravity environment of the space shuttle Columbia (STS-62) show quantitatively that convection alters the tip velocities and radii of curvature of dendrites in both terrestrial and microgravity conditions. In addition, these data can be used to evaluate both how well the Ivantsov diffusion solution and the selection rule (the product of the dendrite tip velocity and the tip radius of curvature squared is a constant) match the dendritic growth data under microgravity conditions. C1 NASA,LEWIS RES CTR,DIV SPACE EXPT,CLEVELAND,OH 44135. RP GLICKSMAN, ME (reprint author), RENSSELAER POLYTECH INST,DEPT MAT ENGN,TROY,NY 12180, USA. OI Glicksman, Martin/0000-0002-2675-2759 NR 21 TC 42 Z9 42 U1 0 U2 7 PU IRON STEEL INST JAPAN KEIDANREN KAIKAN PI TOKYO PA 9-4 OTEMACHI 1-CHOME CHIYODA-KU, TOKYO 100, JAPAN SN 0915-1559 J9 ISIJ INT JI ISIJ Int. PY 1995 VL 35 IS 6 BP 604 EP 610 DI 10.2355/isijinternational.35.604 PG 7 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA RH004 UT WOS:A1995RH00400008 ER PT J AU Jensen, BJ Bryant, RG Smith, JG Hergenrother, PM AF Jensen, BJ Bryant, RG Smith, JG Hergenrother, PM TI Adhesive properties of cured phenylethynyl-terminated imide oligomers SO JOURNAL OF ADHESION LA English DT Article DE adhesion; phenylethynyl-terminated imides; polyimides; high performance adhesives; pseudo thermoset resins; lap shear strength; tensile strength; tensile modulus; peel strength AB As part of a program to develop structural adhesives for high performance aerospace applications, phenylethynyl-terminated imide oligomers are under evaluation. Imide oligomers with different molecular weights and compositions endcapped with either 4-(3-aminophenoxy)-4'-phenylethynylbenzophenone (3-APEB) or 4-phenylethynylphthalic anhydride (PEPA) have been prepared and characterized. These oligomers exhibit excellent processability. After heating to 350 degreesC for 1 hour, the terminal phenylethynyl groups have reacted to provide chain extension, branching and crosslinking. The cured polymers exhibit excellent solvent resistance and high mechanical properties as neat resins and in various adhesive forms (tensile shear, sandwich flatwise tension and climbing drum peel specimens). The chemistry and properties of these phenylethynyl-terminated imide oligomers are discussed. C1 NASA, Langley Res Ctr, Hampton, VA 23681 USA. RP Jensen, BJ (reprint author), NASA, Langley Res Ctr, MS 226, Hampton, VA 23681 USA. NR 23 TC 30 Z9 30 U1 0 U2 10 PU GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP PI PHILADELPHIA PA 325 CHESTNUT ST, 8TH FL, PHILADELPHIA, PA 19106 USA SN 0021-8464 J9 J ADHESION JI J. Adhes. PY 1995 VL 54 IS 1-2 BP 57 EP 66 DI 10.1080/00218469508014381 PG 10 WC Engineering, Chemical; Materials Science, Multidisciplinary; Mechanics SC Engineering; Materials Science; Mechanics GA V2987 UT WOS:000169020600005 ER PT J AU Progar, DJ St Clair, TL Yamaguchi, A Tamai, S AF Progar, DJ St Clair, TL Yamaguchi, A Tamai, S TI LARC (TM) TPI containing pendant phenoxy moieties SO JOURNAL OF ADHESION LA English DT Article DE polyimide; polyimide adhesive; high temperature adhesive; hot-melt adhesive; thermoplastic adhesive; LARC (TM)-TPI; LARC (TM)-TPI-DPO AB The poly(keto-imide), LARC(TM)-TPI, was developed in the late 1970's and has proven to be remarkable stable as a high temperature adhesives. Thermal aging results that were generated at both NASA Langley Research Center and at Boeing Aerospace Company proved this material to be stable in adhesive bond form for at least 60,000 hours at 232 degreesC. A commercial form of LARC(TM)-TPI was made available in the mid-to-late 1980's by Mitsui Toatsu Chemicals, Inc. (MTC). Since that time, MTC has optimized the process for manufacturing LARC(TM)-TPI with the major improvements being in molecular weight control. Most recently, MTC synthesized a derivatized version of LARC(TM)-TPI which contains pendant phenoxy moieties. This material is soluble in a number of organic solvents and it exhibits outstanding melt-flow properties which make it attractive as a hot-melt-processable polyimide adhesive. The synthesis and characterization of this novel material is the subject of this research paper. C1 NASA, Langley Res Ctr, Hampton, VA 23681 USA. Mitsui Toatsu Chem Co Ltd, Cent Res Inst, Yokohama, Kanagawa, Japan. RP Progar, DJ (reprint author), NASA, Langley Res Ctr, Hampton, VA 23681 USA. NR 7 TC 1 Z9 1 U1 0 U2 0 PU GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP PI PHILADELPHIA PA 325 CHESTNUT ST, 8TH FL, PHILADELPHIA, PA 19106 USA SN 0021-8464 J9 J ADHESION JI J. Adhes. PY 1995 VL 54 IS 1-2 BP 103 EP 114 DI 10.1080/00218469508014384 PG 12 WC Engineering, Chemical; Materials Science, Multidisciplinary; Mechanics SC Engineering; Materials Science; Mechanics GA V2987 UT WOS:000169020600008 ER PT J AU Miller, JL Progar, DJ Johnson, WS St Clair, TL AF Miller, JL Progar, DJ Johnson, WS St Clair, TL TI Preliminary evaluation of hybrid titanium composite laminates SO JOURNAL OF ADHESION LA English DT Article DE adhesive bonding; graphite fibers; isothermal fatigue; laminated titanium; crack growth ID ADHESIVE AB In this study, the mechanical response of hybrid titanium composite laminates (HTCL) was evaluated at room and elevated temperatures. Also, the use of an elastic-plastic laminate analysis program for predicting the tensile response from constituent properties was verified. The improvement in mechanical properties achieved by the laminates was assessed by comparing the results of static strength and constant amplitude fatigue tests with those for monolithic titanium sheet. Two HTCL were fabricated with different fiber volume fractions, resin layer thicknesses and resins. One panel was thicker and was poorly bonded in comparison with the other. Consequently, the former had a lower tensile strength, while fewer cracks grew in this panel and at a slower rate. Both panels showed an improvement in fatigue life of almost two orders of magnitude. The model predictions were also in good agreement with the experimental results for both HTCL panels. C1 NASA, Langley Res Ctr, Hampton, VA 23681 USA. RP Miller, JL (reprint author), NASA, Langley Res Ctr, Hampton, VA 23681 USA. NR 16 TC 13 Z9 13 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0021-8464 J9 J ADHESION JI J. Adhes. PY 1995 VL 54 IS 1-2 BP 223 EP 240 DI 10.1080/00218469508014392 PG 18 WC Engineering, Chemical; Materials Science, Multidisciplinary; Mechanics SC Engineering; Materials Science; Mechanics GA V2987 UT WOS:000169020600016 ER PT J AU BOWLES, KJ KAMVOURIS, JE AF BOWLES, KJ KAMVOURIS, JE TI PENETRATION OF CARBON-FABRIC REINFORCED COMPOSITES BY EDGE CRACKS DURING THERMAL AGING SO JOURNAL OF ADVANCED MATERIALS LA English DT Article ID THERMOOXIDATIVE STABILITY AB The purpose of this work was to characterize the thermal degradation of carbon fabric reinforced PMR-15 polyimide composites by investigating the formation of edge cracks in composites of different geometric designs. A simple, innovative water immersion technique was developed to augment the standard metallographic and radiographic examinations that are normally performed in evaluating oxidative exposure effects on composite materials. This technique was used to quantify the amount and distribution of crack volume generated by the aging process. The crack volume was assumed to indicate the relative magnitude of crack surface area that was created. The results of this study clarified the relationships between crack formation and growth and the thermal and oxidative degradation of carbon fabric reinforced composites. RP BOWLES, KJ (reprint author), NASA,LEWIS RES CTR,CLEVELAND,OH 44135, USA. NR 7 TC 3 Z9 3 U1 0 U2 0 PU SAMPE PUBLISHERS PI COVINA PA 1161 PARKVIEW DRIVE, COVINA, CA 91722 SN 1070-9789 J9 J ADV MATER JI J. Adv. Mater. PD JAN PY 1995 VL 26 IS 2 BP 2 EP 11 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA QA140 UT WOS:A1995QA14000001 ER PT J AU PERRY, B COLE, SR MILLER, GD AF PERRY, B COLE, SR MILLER, GD TI SUMMARY OF AN ACTIVE FLEXIBLE WING PROGRAM SO JOURNAL OF AIRCRAFT LA English DT Article AB This article presents a summary of a NASA/Rockwell Active Flexible Wing program. Major elements of the program are presented. Keg program accomplishments included single- and multiple-mode flutter suppression, load alleviation and load control during rapid roll maneuvers, and multi-input/multi-output multiple-function active controls tests above the open-loop flutter boundary. RP PERRY, B (reprint author), NASA,LANGLEY RES CTR,DIV STRUCT,AEROELAST BRANCH,M-S 340,HAMPTON,VA 23681, USA. NR 0 TC 39 Z9 53 U1 1 U2 3 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD JAN-FEB PY 1995 VL 32 IS 1 BP 10 EP 15 DI 10.2514/3.46677 PG 6 WC Engineering, Aerospace SC Engineering GA QE629 UT WOS:A1995QE62900003 ER PT J AU SILVA, WA BENNETT, RM AF SILVA, WA BENNETT, RM TI APPLICATION OF TRANSONIC SMALL DISTURBANCE THEORY TO THE ACTIVE FLEXIBLE WING MODEL SO JOURNAL OF AIRCRAFT LA English DT Article AB The CAP-TSD code, developed at the NASA Langley Research Center, is applied to the active flexible wing wind-tunnel model for prediction of transonic aeroelastic behavior. A semispan computational model is used for evaluation of symmetric motions, and a full-span model is used for evaluation of antisymmetric motions. Static aeroelastic solutions using the computational aeroelasticity program-transonic small disturbance, are computed. Dynamic (flutter) analyses are then performed as perturbations about the static aeroelastic deformations and presented as nutter boundaries in terms of Mach number and dynamic pressure. Flutter boundaries that take into account modal refinements, vorticity and entropy corrections, antisymmetric motions, and sensitivity to the modeling of the wingtip ballast stores are also presented and compared with experimental flutter results. RP SILVA, WA (reprint author), NASA,LANGLEY RES CTR,AEROELAST BRANCH,HAMPTON,VA 23681, USA. NR 0 TC 4 Z9 4 U1 1 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD JAN-FEB PY 1995 VL 32 IS 1 BP 16 EP 22 DI 10.2514/3.46678 PG 7 WC Engineering, Aerospace SC Engineering GA QE629 UT WOS:A1995QE62900004 ER PT J AU BUTTRILL, C BACON, B HEEG, J HOUCK, J WOOD, D AF BUTTRILL, C BACON, B HEEG, J HOUCK, J WOOD, D TI SIMULATION AND MODEL-REDUCTION FOR THE ACTIVE FLEXIBLE WING PROGRAM SO JOURNAL OF AIRCRAFT LA English DT Article AB The simulation methodology used in the Active Flexible Wing mind-tunnel test program is described. An overview of the aeroservoelastic modeling used in building the required batch and hot-bench simulations is presented. Successful hot-bench implementation required that the full mathematical model be significantly reduced while assuring that accuracy be maintained for all combinations of 10 inputs and 56 outputs. The reduction was accomplished by using a method based on internally balanced realizations and by focusing on the linear, aeroelastic portion of the full mathematical model. The error-bound properties of the internally balanced realization significantly contribute to its utility in the model reduction process. The reduction method and the results achieved are described. RP BUTTRILL, C (reprint author), NASA,LANGLEY RES CTR,DYNAM & CONTROL BRANCH,HAMPTON,VA 23681, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD JAN-FEB PY 1995 VL 32 IS 1 BP 23 EP 31 DI 10.2514/3.46679 PG 9 WC Engineering, Aerospace SC Engineering GA QE629 UT WOS:A1995QE62900005 ER PT J AU HOADLEY, ST MCGRAW, SM AF HOADLEY, ST MCGRAW, SM TI MULTIPLE-FUNCTION DIGITAL CONTROLLER SYSTEM FOR ACTIVE FLEXIBLE WING WIND-TUNNEL MODEL SO JOURNAL OF AIRCRAFT LA English DT Article AB A real-time multiple-function digital controller system was developed for the Active Flexible Wing program, which demonstrated through wind-tunnel tests that digital control can be used with greet versatility to perform a multifunction task such as suppressing nutter and reducing loads during rolling maneuvers. The digital controller system (DCS) allowed simultaneous execution of two control laws: 1) nutter suppression and 2) either roll trim or a rolling maneuver load control. The DCS operated within, but independently of, a slower host operating system environment, at regulated speeds up to 200 Hz. It also coordinated the acquisition, storage, and transfer of data for near real-time controller performance evaluation and both open- and closed-loop plant estimation. It synchronized the operation of four different processing units, allowing flexibility in the number, form, functionality, and order of control laws, and variability in selection of sensors and actuators employed. Most importantly, the DCS enabled successful demonstration of active nutter suppression to conditions approximately 26% (in dynamic pressure) above the open-loop boundary in cases when the model was fixed-in-roll, and up to 23% when it was free-to-roll. Aggressive roll maneuvers with load control were achieved above the nutter boundary. The purpose of this article is to present the development, validation, and wind-tunnel testing of this multiple-function digital controller system. RP HOADLEY, ST (reprint author), NASA,LANGLEY RES CTR,AEROELEAST BRANCH,M-S 340,HAMPTON,VA 23681, USA. NR 0 TC 0 Z9 1 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD JAN-FEB PY 1995 VL 32 IS 1 BP 32 EP 38 DI 10.2514/3.46680 PG 7 WC Engineering, Aerospace SC Engineering GA QE629 UT WOS:A1995QE62900006 ER PT J AU WIESEMAN, CD HOADLEY, ST MCGRAW, SM AF WIESEMAN, CD HOADLEY, ST MCGRAW, SM TI ONLINE ANALYSIS CAPABILITIES DEVELOPED TO SUPPORT THE ACTIVE FLEXIBLE WING WIND-TUNNEL TESTS SO JOURNAL OF AIRCRAFT LA English DT Article AB A variety of on-line analysis tools were developed to support two active flexible wing (AFW) wind-tunnel tests. These tools were developed to verify control law execution, to satisfy analysis requirements of the control law designers, to provide measures of system stability in a real-time environment, and to provide project managers with a quantitative measure of controller performance. Descriptions and purposes of capabilities that were developed are presented in this article along with examples. Procedures for saving and transferring data for near real-time analysis. and descriptions of the corresponding data interface programs are also presented. Although much of the on-line analysis capabilities described herein are not technically new, the implementation for near real-time analysis to verify and evaluate controller performance is new, and is included in this special Journal if Aircraft issue for completeness in describing the AFW mind-tunnel testing. The on-line analysis tools worked well before, during, and after the wind-tunnel tests, and proved to be a vital and important part of the entire test effort. RP WIESEMAN, CD (reprint author), NASA,LANGLEY RES CTR,AEROELAST BRANCH,M-S 340,HAMPTON,VA 23681, USA. NR 0 TC 1 Z9 2 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD JAN-FEB PY 1995 VL 32 IS 1 BP 39 EP 44 DI 10.2514/3.46681 PG 6 WC Engineering, Aerospace SC Engineering GA QE629 UT WOS:A1995QE62900007 ER PT J AU MUKHOPADHYAY, V AF MUKHOPADHYAY, V TI FLUTTER SUPPRESSION CONTROL LAW DESIGN AND TESTING FOR THE ACTIVE FLEXIBLE WING SO JOURNAL OF AIRCRAFT LA English DT Article AB Design of a control law for simultaneously suppressing the symmetric and antisymmetric Gutter modes of a sting-mounted, fixed-in-roll aeroelastic wind-tunnel model is described. The Gutter suppression control law was designed using linear quadratic Gaussian theory, and involved control law order reduction, a gain root-locus study, and use of previous experimental results. A 23% increase in the open-loop Gutter dynamic pressure was demonstrated during the wind-tunnel test. Rapid roll maneuvers at 11% above the symmetric Gutter boundary were also performed when the model was in a free-to-roil configuration. RP MUKHOPADHYAY, V (reprint author), NASA,LANGLEY RES CTR,DIV STRUCT DYNAM,ANAL & OPTIMIZAT BRANCH,HAMPTON,VA 23681, USA. NR 0 TC 34 Z9 39 U1 1 U2 3 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD JAN-FEB PY 1995 VL 32 IS 1 BP 45 EP 51 DI 10.2514/3.46682 PG 7 WC Engineering, Aerospace SC Engineering GA QE629 UT WOS:A1995QE62900008 ER PT J AU ADAMS, WM CHRISTHILF, DM AF ADAMS, WM CHRISTHILF, DM TI DESIGN AND MULTIFUNCTION TESTS OF A FREQUENCY DOMAIN-BASED ACTIVE FLUTTER SUPPRESSION SYSTEM SO JOURNAL OF AIRCRAFT LA English DT Article AB This article describes the process of analysis, design, digital implementation, and subsonic testing of an active controls nutter suppression system for a full-span, free-to-roll, wind-tunnel model of an advanced fighter concept. A frequency domain representation of the plant was employed, and a robust multiinput/multioutput controller was generated by using optimization techniques to maximize singular value robustness criteria and insensitivity to uncertainty in the nutter frequency. During testing in a fixed-in-roll configuration, simultaneous suppression of both symmetric and antisymmetric nutter was successfully demonstrated. For a free-to-roll configuration, symmetric nutter was suppressed to the limit of the tunnel test envelope. During aggressive rolling maneuvers above the open-loop nutter boundary, simultaneous nutter suppression and maneuver load control were demonstrated. Finally, the nutter suppression controller was reoptimized during the test using combined experimental and analytical frequency domain data, resulting in improved stability robustness. The reoptimization, accomplished overnight, shows the potential, with a much faster computer, to apply the design procedure to a tuning-type adaptive active nutter suppression controller. RP ADAMS, WM (reprint author), NASA,LANGLEY RES CTR,6 N DRYDEN ST,M-S 489,HAMPTON,VA 23681, USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD JAN-FEB PY 1995 VL 32 IS 1 BP 52 EP 60 DI 10.2514/3.46683 PG 9 WC Engineering, Aerospace SC Engineering GA QE629 UT WOS:A1995QE62900009 ER PT J AU WASZAK, MR SRINATHKUMAR, S AF WASZAK, MR SRINATHKUMAR, S TI FLUTTER SUPPRESSION FOR THE ACTIVE FLEXIBLE WING - A CLASSICAL DESIGN SO JOURNAL OF AIRCRAFT LA English DT Article AB The synthesis and experimental validation of a control law for an active flutter suppression system for the active flexible wing mind-tunnel model is presented. The design was accomplished with traditional root locus methods making extensive use of interactive computer graphics tools and simulation-based analysis. The design approach relied on a fundamental understanding of the nutter mechanism to formulate a very simple control law structure resulting in a filter with a ''inverted notch'' characteristic. This unusual filter characteristic was required to compensate for adverse zero locations in the frequency range near flutter. Wind-tunnel tests of the flutter suppression controller demonstrated simultaneous suppression of two flutter modes, significantly increasing the flutter dynamic pressure. The flutter suppression controller was also successfully operated in combination with a rolling maneuver controller to perform nutter suppression during rapid rolling maneuvers. RP WASZAK, MR (reprint author), NASA,LANGLEY RES CTR,HAMPTON,VA 23665, USA. NR 0 TC 22 Z9 24 U1 1 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD JAN-FEB PY 1995 VL 32 IS 1 BP 61 EP 67 DI 10.2514/3.46684 PG 7 WC Engineering, Aerospace SC Engineering GA QE629 UT WOS:A1995QE62900010 ER PT J AU WOODSVEDELER, JA POTOTZKY, AS HOADLEY, ST AF WOODSVEDELER, JA POTOTZKY, AS HOADLEY, ST TI ROLLING MANEUVER LOAD ALLEVIATION USING ACTIVE CONTROLS SO JOURNAL OF AIRCRAFT LA English DT Article AB Rolling maneuver load alleviation (RMLA) has been demonstrated on the Active Flexible Wing wind-tunnel model in the NASA Langley Transonic Dynamics Tunnel (TDT). The objective was to develop a systematic approach for designing active control laws to alleviate wing loads generated during rolling maneuvers. Two RMLA control laws were developed that utilized outboard control surface pairs (leading and trailing edge) to counteract the loads and used inboard trailing-edge control surface pairs to maintain roll performance. Rolling maneuver load tests were performed in the TDT at several dynamic pressures including two below and one 11% above the open-loop flutter dynamic pressure. Above open-loop flutter, the RMLA system was operated simultaneously with an active Flutter Suppression System. At all dynamic pressures for which baseline results were obtained, torsion moment loads were reduced for both RMLA control laws. Results for bending moment load reductions were mixed; however, design equations developed in this study provided conservative estimates of load reduction in all cases. RP WOODSVEDELER, JA (reprint author), NASA,LANGLEY RES CTR,STRUCT DYNAM BRANCH,M-S 297,HAMPTON,VA 23681, USA. NR 0 TC 12 Z9 13 U1 1 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD JAN-FEB PY 1995 VL 32 IS 1 BP 68 EP 76 DI 10.2514/3.46685 PG 9 WC Engineering, Aerospace SC Engineering GA QE629 UT WOS:A1995QE62900011 ER PT J AU CHEUNG, S AARONSON, P EDWARDS, T AF CHEUNG, S AARONSON, P EDWARDS, T TI CFD OPTIMIZATION OF A THEORETICAL MINIMUM-DRAG BODY SO JOURNAL OF AIRCRAFT LA English DT Article AB This article describes a methodology behind coupling a fast, parabolized Navier-Stokes flow solver to a nonlinear constrained optimizer. The design parameters, constraints, grid refinement, behavior of the optimizer, and flow physics related to the CFD calculations are discussed. Pressure drag reduction in the supersonic regime of a theoretical minimum-drag body of revolution is performed. Careful selection of design variables allows the optimization process to improve the aerodynamic performance. A calculation including nonlinear and viscous effects produces a different minimum drag geometry than linear theory and results in a drag reduction of approximately 4%. Effect of grid density on the optimization process is also studied. In order to obtain accurate optimization results, CFD calculations must model physical phenomena that contribute to the optimization parameters. RP CHEUNG, S (reprint author), NASA,AMES RES CTR,MCAT INST,MOFFETT FIELD,CA 94035, USA. NR 0 TC 2 Z9 2 U1 1 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD JAN-FEB PY 1995 VL 32 IS 1 BP 193 EP 198 DI 10.2514/3.46700 PG 6 WC Engineering, Aerospace SC Engineering GA QE629 UT WOS:A1995QE62900028 ER PT J AU TENNYSON, JM AF TENNYSON, JM TI SEAFOODS SO JOURNAL OF AOAC INTERNATIONAL LA English DT Article ID PERFORMANCE LIQUID-CHROMATOGRAPHY; INCLUDING MYCOBACTERIUM-TUBERCULOSIS; TETRACYCLINE ANTIBIOTICS; LUMINESCENCE DETECTION; MUSCLE-TISSUE; DNA PROFILES; OXYTETRACYCLINE; FISH; HPLC; RESIDUES RP TENNYSON, JM (reprint author), NATL MARINE FISHERIES SERV,NATL SEAFOOD INSPECT LAB,3209 FREDERIC ST,PO DRAWER 1207,PASCAGOULA,MS 39568, USA. NR 30 TC 4 Z9 4 U1 0 U2 0 PU AOAC INTERNATIONAL PI GAITHERSBURG PA 481 NORTH FREDRICK AVE, STE 500, GAITHERSBURG, MD 20877-2504 SN 1060-3271 J9 J AOAC INT JI J. AOAC Int. PD JAN-FEB PY 1995 VL 78 IS 1 BP 166 EP 170 PG 5 WC Chemistry, Analytical; Food Science & Technology SC Chemistry; Food Science & Technology GA QG945 UT WOS:A1995QG94500050 ER PT J AU PRASAD, N YEH, HYM ADLER, RF TAO, WK AF PRASAD, N YEH, HYM ADLER, RF TAO, WK TI MICROWAVE AND INFRARED SIMULATIONS OF AN INTENSE CONVECTIVE SYSTEM AND COMPARISON WITH AIRCRAFT OBSERVATIONS SO JOURNAL OF APPLIED METEOROLOGY LA English DT Article ID WATER-VAPOR; RADIATIVE-TRANSFER; 183 GHZ; PRECIPITATING CLOUD; DEEP CONVECTION; MODEL; ICE; FREQUENCIES; RAINFALL; PARAMETERIZATION AB A three-dimensional cloud model, radiative transfer model-based simulation system is tested and validated against the aircraft-based radiance observations of an intense convective system in southeastern Virginia on 29 June 1986 during the Cooperative Huntsville Meteorological Experiment. NASA's ER-2, a high-altitude research aircraft with a complement of radiometers operating at 11-mu m infrared channel and 18-, 37-, 92-, and 183-GHz microwave channels provided data for this study. The cloud model successfully simulated the cloud system with regard to aircraft- and radar-observed cloud-top heights and diameters and with regard to radar-observed reflectivity structure. For the simulation time found to correspond best with the aircraft- and radar-observed structure, brightness temperatures T-b are simulated and compared with observations for all the microwave frequencies along with the 11-mu m infrared channel. Radiance calculations at the various frequencies correspond well with the aircraft observations in the areas of deep convection. The clustering of 37-174-GHz T-b observations and the isolation of the 18-GHz values over the convective cores are well simulated by the model. The radiative transfer model, in general, is able to simulate the observations reasonably well from 18 GHz through 174 GHz within all convective areas of the cloud system. When the aircraft-observed 18- and 37-GHz, and 90- and 174-GHz T-b's are plotted against each other, the relationships have a gradual difference in the slope due to the differences in the ice particle size in the convective and more stratiform areas of the cloud. The model is able to capture these differences observed by the aircraft. Brightness temperature-rain rate relationships compare reasonably well with the aircraft observations in terms of the slope of the relationship. The model calculations are also extended to select high-frequency channels al 220, 340, and 400 GHz to simulate the Millimeter-wave Imaging Radiometer aircraft instrument to be flown in the near future. All three of these frequencies are able to discriminate the convective and anvil portions of the system, providing useful information similar to that from the frequencies below 183 GHz but with potentially enhanced spatial resolution from a satellite platform. In thin clouds, the dominant effect of water vapor is seen at 174, 340, and 400 GHz. In thick cloudy areas, the scattering effect is dominant at 90 and 220 GHz, while the overlying water vapor can attenuate at 174, 340, and 400 GHz. All frequencies (90-400 GHz) show strong signatures in the core. C1 SCI SYST & APPLICAT INC,LANHAM,MD. CAELUM RES CORP,SILVER SPRING,MD. NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 39 TC 16 Z9 16 U1 0 U2 1 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0894-8763 J9 J APPL METEOROL JI J. Appl. Meteorol. PD JAN PY 1995 VL 34 IS 1 BP 153 EP 174 DI 10.1175/1520-0450(1995)034<0153:MAISOA>2.0.CO;2 PG 22 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA QA498 UT WOS:A1995QA49800012 ER PT J AU YEH, HYM PRASAD, N MENEGHINI, R TAO, WK JONES, JA ADLER, RF AF YEH, HYM PRASAD, N MENEGHINI, R TAO, WK JONES, JA ADLER, RF TI CLOUD MODEL-BASED SIMULATION OF SPACEBORNE RADAR OBSERVATIONS SO JOURNAL OF APPLIED METEOROLOGY LA English DT Article ID AIRCRAFT MICROWAVE OBSERVATIONS; DEEP CONVECTION; 183 GHZ; PROPAGATION; RAIN; LINE AB Simulations of observations from potential spaceborne radars are made based on storm structure generated from the three-dimensional (3D) Goddard cumulus ensemble model simulation of an intense overland convective system. Five frequencies of 3, 10, 14, 35, and 95 GHz are discussed, but the Tropical Rainfall Measuring Mission precipitation radar sensor frequency (14 GHz) is the focus of this study. Radar reflectivities and their attenuation in various atmospheric conditions are studied in this simulation. With the attenuation from cloud and precipitation in the estimation of reflectivity factor (dBZ), the reflectivities in the lower atmosphere in the convective cores are significantly reduced. With spatial resolution of 4 km X 4 km, attenuation at 14 GHz may cause as large as a 20-dBZ difference between the simulated measurements of the peak (Z(mp)) and near-surface reflectivity (Z(ms)) in the most intense convective region. The Z(mp) occurs at various altitudes depending on the hydrometeor concentrations and their vertical distribution. Despite the significant attenuation in the intense cores, the presence of the rain maximum is easily detected by using information of Z(mp). fn the stratiform region, the attenuation is quite limited (usually less than 5 dBZ), and the reduction of reflectivity is mostly related to the actual vertical structure of cloud distribution. Since Z(ms) suffers severe attenuation and tends to underestimate surface rainfall intensity in convective regions, Z(mp) can be more representative for rainfall retrieval in the lower atmosphere in these regions. In the stratiform region where attenuation is negligible, however, Z(mp) tends to overestimate surface rainfall and Z(ms) is more appropriate for rainfall retrieval. A hybrid technique using a weight between the two rain intensities is tested and found potentially useful for future applications. The estimated surface rain-rate map based on this hybrid approach captures many of the details of the cloud model rain field but still slightly underestimates the rain-rate maximum. C1 SCI SYST & APPLICAT INC,LANHAM,MD. NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. HUGHES STX CORP,LANHAM,MD. RP YEH, HYM (reprint author), CAELUM RES CORP,11229 LOCKWOOD DR,SILVER SPRING,MD 20901, USA. NR 20 TC 13 Z9 14 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0894-8763 J9 J APPL METEOROL JI J. Appl. Meteorol. PD JAN PY 1995 VL 34 IS 1 BP 175 EP 197 DI 10.1175/1520-0450-34.1.175 PG 23 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA QA498 UT WOS:A1995QA49800013 ER PT J AU NAVIDI, M WOLINSKY, I FUNG, P ARNAUD, SB AF NAVIDI, M WOLINSKY, I FUNG, P ARNAUD, SB TI EFFECT OF EXCESS DIETARY SALT ON CALCIUM-METABOLISM AND BONE-MINERAL IN A SPACEFLIGHT RAT MODEL SO JOURNAL OF APPLIED PHYSIOLOGY LA English DT Article DE PARATHYROID HORMONE; 1,25-DIHYDROXYVITAMIN D AXIS; TAIL SUSPENSION; CALCIURIA ID SIMULATED WEIGHTLESSNESS; PARATHYROID FUNCTION; SKELETAL RESPONSE; 1,25-DIHYDROXYVITAMIN-D; IMMOBILIZATION; ABSORPTION; INHIBITION; SUSPENSION; BALANCE; MUSCLE AB High levels of salt promote urinary calcium (UCa) loss and have the potential to cause bone mineral deficits if intestinal Ca absorption does not compensate for these losses. To determine the effect of excess dietary salt on the osteopenia that follows skeletal unloading, we used a spaceflight model that unloads the hindlimbs of 200-g rats by tail suspension (S). Rats were studied for 2 wk on diets containing high salt (4 and 8%) and normal calcium (0.45%) and for 4 wk on diets containing 8% salt (HiNa) and 0.2% Ca (LoCa). Final body weights were 9-11% lower in S than in control rats (C) in both experiments, reflecting lower growth rates in S than in C during pair feeding. UCa represented 12% of dietary Ca on HiNa diets and was twofold higher in S than in C transiently during unloading. Net intestinal Ca absorption was consistently 11-18% lower in S than in C. Serum 1,25-dihydroxyvitamin D was unaffected by either LoCa or HiNa diets in S but was increased by LoCa and HiNa diets in C. Despite depressed intestinal Ca absorption in S and a sluggish response of the Ca endocrine system to HiNa diets, UCa loss did not appear to affect the osteopenia induced by unloading. Although any deficit in bone mineral content from HiNa diets may have been too small to detect or the duration of the study too short to manifest, there were clear differences in Ca metabolism from control levels in the response of the spaceflight model to HiNa diets, indicated by depression of intestinal Ca absorption and its regulatory hormone. C1 NASA,AMES RES CTR,DIV LIFE SCI SL23911,MOFFETT FIELD,CA 94035. UNIV HOUSTON,DEPT HUMAN DEV,HOUSTON,TX 77204. NR 35 TC 17 Z9 17 U1 0 U2 0 PU AMER PHYSIOLOGICAL SOC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 8750-7587 J9 J APPL PHYSIOL JI J. Appl. Physiol. PD JAN PY 1995 VL 78 IS 1 BP 70 EP 75 PG 6 WC Physiology; Sport Sciences SC Physiology; Sport Sciences GA QC301 UT WOS:A1995QC30100012 PM 7713846 ER PT J AU AGGSON, TL HERRERO, FA JOHNSON, JA PFAFF, RF LAAKSO, H MAYNARD, NC MOSES, JJ AF AGGSON, TL HERRERO, FA JOHNSON, JA PFAFF, RF LAAKSO, H MAYNARD, NC MOSES, JJ TI SATELLITE-OBSERVATIONS OF ZONAL ELECTRIC-FIELDS NEAR SUNRISE IN THE EQUATORIAL IONOSPHERE SO JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS LA English DT Article ID F-REGION DYNAMO; DRIFTS AB We report here on a number of examples of anomalous enhancements of eastward electric fields near sunrise in the equatorial ionospheric F-region. These examples were selected from the data base of the equatorial satellite, San Marco D (1988), which measured ionospheric electric fields during a period of solar minimum. The eastward electric fields reported correspond to vertical plasma drifts. The examples studied here are similar in signature and polarity to the pre-reversal electric field enhancements seen near sunset from ground-based radar systems. The morphology of these sunrise events, which are observed on about 14% of the morning-side satellite passes, are studied as a function of local zonal velocity, magnetic activity, geographic longitude and altitude. The nine events studied occur at locations where the zonal plasma flow is generally measured to be eastward, but reducing as a function of local time and at satellite longitudes where the magnetic declination has the opposite polarity as the declination of the sunrise terminator. C1 MISSION RES CORP, NASHUA, NH USA. RP AGGSON, TL (reprint author), NASA, GODDARD SPACE FLIGHT CTR, CODE 696, GREENBELT, MD 20771 USA. RI Pfaff, Robert/F-5703-2012 OI Pfaff, Robert/0000-0002-4881-9715 NR 11 TC 14 Z9 14 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0021-9169 J9 J ATMOS TERR PHYS JI J. Atmos. Terr. Phys. PD JAN PY 1995 VL 57 IS 1 BP 19 EP 24 DI 10.1016/0021-9169(93)E0013-Y PG 6 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA PX502 UT WOS:A1995PX50200003 ER PT J AU LEE, TJ MARTIN, JML TAYLOR, PR AF LEE, TJ MARTIN, JML TAYLOR, PR TI AN ACCURATE AB-INITIO QUARTIC FORCE-FIELD AND VIBRATIONAL FREQUENCIES FOR CH4 AND ISOTOPOMERS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SPECTROSCOPIC CONSTANTS; EQUILIBRIUM STRUCTURE; RAMAN-SPECTROSCOPY; BOND DISTANCE; METHANE 13CD4; MOLECULES; HYDROGEN; STATE C1 LIMBURGS UNIV CENTRUM,DEPT SBG,B-3590 DIEPENBEEK,BELGIUM. UNIV INSTELLING ANTWERP,DEPT CHEM,B-2610 WILRIJK,BELGIUM. SAN DIEGO SUPERCOMP CTR,SAN DIEGO,CA 92186. RP LEE, TJ (reprint author), NASA,AMES RES CTR,MOFFETT FIELD,CA 94035, USA. RI Lee, Timothy/K-2838-2012; Martin, Jan/A-7457-2008 OI Martin, Jan/0000-0002-0005-5074 NR 32 TC 170 Z9 171 U1 2 U2 9 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 JAN 1 PY 1995 VL 102 IS 1 BP 254 EP 261 DI 10.1063/1.469398 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PZ714 UT WOS:A1995PZ71400027 ER PT J AU CHEN, TC CHEN, JM PFAENDTNER, J AF CHEN, TC CHEN, JM PFAENDTNER, J TI LOW-FREQUENCY VARIATIONS IN THE ATMOSPHERIC BRANCH OF THE GLOBAL HYDROLOGICAL CYCLE SO JOURNAL OF CLIMATE LA English DT Article ID FRESH-WATER; SYSTEMATIC-ERRORS; FORECASTS; MODEL; ECMWF AB According to the atmospheric water balance equation, the divergence of the water vapor flux is responsible for the exchange of water vapor between its source and sink regions. Because the water vapor flux divergence is primarily determined by the divergent circulation, time variations of the global hydrological cycle reflect the pronounced low-frequency modes of the global divergent circulation, that is, the annual and intraseasonal (30-60 day) modes. The annual variation of the hydrological cycle is illustrated in terms of hemispheric-mean hydrological variables for the Northern and Southern Hemispheres, while the intraseasonal variations of the global hydrological cycle are illustrated with mean values over two hemispheres that form an east-west partition of the globe. This partition is defined by the 60 degrees E-120 degrees W great circle and was chosen so that the mean precipitation difference and the divergent water vapor transport between the two hemispheres was maximized. Two years (1979-80) of daily precipitation estimates from the Goddard Laboratory for Atmospheres and 14 years (1979-92) of upper-air data generated by the Global Data Assimilation System at the National Meteorological Center are used in making quantitative estimates of the annual and intraseasonal variations in the global hydrological cycle. The annual variations in hemispheric-mean precipitation [(P) over cap] and water vapor flux divergence [del.(Q) over cap] for the Northern and Southern Hemispheres are comparable with amplitudes of about 0.5 similar to 0.7 mm day(-1). Both [(P) over cap] and [del.(Q) over cap] vary annually in a coherent way in each hemisphere so that water vapor diverges from the winter hemisphere, where [P] reaches its minimum, to the summer hemisphere, where [(P) over cap] attains its maximum. In fact, the hemispheric-mean divergence of water vapor flux changes sign during the annual cycle. Intraseasonal variations of hemispheric-mean precipitation [(P) over tilde], evaporation [(E) over tilde], and water vapor flux divergence [del.(Q) over tilde] in the two hemispheres in the east-west direction are comparable with amplitudes of about 0.1 similar to 0.2 mm day(-1), although amplitudes in some cases exceed 0.3 mm day(-1). Hemispheric-mean precipitation [(P) over tilde] varies coherently in opposite phase for the two hemispheres, while [del.(Q) over tilde] varies so that water vapor diverges from the hemisphere of maximum [(P) over tilde] to the hemisphere of minimum [(P) over tilde]. Intraseasonal variations of [(P) over tilde], [(E) over tilde], and [del.(Q) over tilde] are in accord with the eastward propagation of the intraseasonal global divergent circulation. C1 NASA,GODDARD SPACE FLIGHT CTR,ATMOSPHERES LAB,GREENBELT,MD 20771. RP CHEN, TC (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT GEOL & ATMOSPHER SCI,ATMOSPHER SCI PROGRAM,3010 AGRON BLDG,AMES,IA 50011, USA. NR 24 TC 21 Z9 22 U1 0 U2 4 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0894-8755 J9 J CLIMATE JI J. Clim. PD JAN PY 1995 VL 8 IS 1 BP 92 EP 107 DI 10.1175/1520-0442(1995)008<0092:LFVITA>2.0.CO;2 PG 16 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA QD495 UT WOS:A1995QD49500006 ER PT J AU SALATHE, EP CHESTERS, D AF SALATHE, EP CHESTERS, D TI VARIABILITY OF MOISTURE IN THE UPPER TROPOSPHERE AS INFERRED FROM TOVS SATELLITE-OBSERVATIONS AND THE ECMWF MODEL ANALYSES IN 1989 SO JOURNAL OF CLIMATE LA English DT Article ID WATER-VAPOR; RELATIVE-HUMIDITY; CLIMATE; FORECASTS AB Large-scale variability of moisture in the upper troposphere is examined using TIROS (Television Infrared Observation Satellite) Operational Vertical Sounder (TOVS) satellite observations and ECMWF model analyses from 1989 in the latitude band from 40 degrees N to 40 degrees S. To compare these dissimilar datasets, upwelling radiances were computed for the 6-7-mu m water vapor band from the ECMWF temperature and moisture analyses, and these computed radiances were compared to the corresponding TOVS satellite observations. The ECMWF-based radiances reproduce the general locations and seasonal cycle of the TOVS-observed moisture features, particularly after an improved convective parameterization scheme was adopted by ECMWF in May 1989. However, the ECMWF analysis scheme still results in much milder lateral moisture gradients and seasonal contrasts than indicated by the TOVS observations. Seasonally, the upper troposphere in each hemisphere dries in winter and moistens in summer, but there are regions in each hemisphere that run counter to this seasonal trend, apparently depending on continental- and monsoon-scale dynamics. Dynamically, the TOVS-observed regions of significant subtropical dryness are correlated with persistent subsidence indicated by ECMWF 300-mb vertical velocity analyses. The TOVS radiance observations indicate large variations in space and time of the upper-tropospheric moisture field, which are not fully captured by the ECMWF analyses. C1 YALE UNIV,DEPT GEOL & GEOPHYS,NEW HAVEN,CT. RP SALATHE, EP (reprint author), NASA,GODDARD SPACE FLIGHT CTR,ATMOSPHERES LAB,CODE 913,GREENBELT,MD 20771, USA. NR 33 TC 20 Z9 20 U1 0 U2 2 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0894-8755 J9 J CLIMATE JI J. Clim. PD JAN PY 1995 VL 8 IS 1 BP 120 EP 132 DI 10.1175/1520-0442(1995)008<0120:VOMITU>2.0.CO;2 PG 13 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA QD495 UT WOS:A1995QD49500008 ER PT J AU COATS, TW HARRIS, CE AF COATS, TW HARRIS, CE TI EXPERIMENTAL-VERIFICATION OF A PROGRESSIVE DAMAGE MODEL FOR IM7/5260 LAMINATES SUBJECTED TO TENSION-TENSION FATIGUE SO JOURNAL OF COMPOSITE MATERIALS LA English DT Article DE COMPOSITES; GRAPHITE EPOXY; DAMAGE; MATRIX CRACKS; DELAMINATION; INTERNAL STATE VARIABLES ID THERMOMECHANICAL CONSTITUTIVE THEORY; ELASTIC COMPOSITES; DISTRIBUTED DAMAGE; CRACKING AB The durability and damage tolerance of laminated composites are critical design considerations for airframe composite structures. Therefore, the ability to model damage initiation and growth and predict the life of laminated composites is necessary to achieve structurally efficient and economical designs. The purpose of this research is to experimentally verify the application of a continuum damage model to predict progressive damage development in a toughened material system. Damage due to monotonic and tension-tension fatigue was documented for IM7/5260 graphite/bismaleimide laminates. Crack density and delamination surface area were used to calculate matrix cracking and delamination internal state variables to predict stiffness loss in unnotched laminates. A damage dependent finite element code predicted the stiffness loss for notched laminates with good agreement to experimental data. It was concluded that the continuum damage model can adequately predict matrix damage progression in notched and unnotched laminates as a function of loading history and laminate stacking sequence. C1 NASA,LANGLEY RES CTR,MAT MECH BRANCH,HAMPTON,VA 23681. OLD DOMINION UNIV,DEPT MECH ENGN,NORFOLK,VA 23508. NR 26 TC 22 Z9 26 U1 0 U2 3 PU TECHNOMIC PUBL CO INC PI LANCASTER PA 851 NEW HOLLAND AVE, BOX 3535, LANCASTER, PA 17604 SN 0021-9983 J9 J COMPOS MATER JI J. Compos Mater. PY 1995 VL 29 IS 3 BP 280 EP 305 PG 26 WC Materials Science, Composites SC Materials Science GA QP903 UT WOS:A1995QP90300001 ER PT J AU MITTAL, SK MURTHY, PLN CHAMIS, CC AF MITTAL, SK MURTHY, PLN CHAMIS, CC TI MICROMECHANICS FOR CERAMIC-MATRIX COMPOSITES VIA FIBER SUBSTRUCTURING SO JOURNAL OF COMPOSITE MATERIALS LA English DT Article AB A generic unit cell model which includes a unique fiber substructuring concept is proposed for the development of micromechanics equations for continuous fiber reinforced ceramic composites. The unit cell consists of three constituents: fiber, matrix and an interphase. In the present approach, the unit cell is further subdivided into several slices and the equations of micromechanics are derived for each slice. These are subsequently integrated to obtain ply level properties. A stand-alone computer code containing the micromechanics model as a module is currently being developed specifically for the analysis of ceramic matrix composites. Towards this development, equivalent ply property results for a SiC (silicon carbide fiber)/Ti-15-3 (titanium matrix) composite with a 0.5 fiber volume ratio are presented and compared with those obtained from customary micromechanics models to illustrate the concept. Also, comparisons with limited experimental data for the ceramic matrix composite, SiC/RBSN (Reaction Bonded Silicon Nitride) with a 0.3 fiber volume ratio are given to validate the concepts. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RP MITTAL, SK (reprint author), UNIV TOLEDO,2801 W BANCROFT ST,TOLEDO,OH 43606, USA. NR 10 TC 13 Z9 14 U1 1 U2 1 PU TECHNOMIC PUBL CO INC PI LANCASTER PA 851 NEW HOLLAND AVE, BOX 3535, LANCASTER, PA 17604 SN 0021-9983 J9 J COMPOS MATER JI J. Compos Mater. PY 1995 VL 29 IS 5 BP 614 EP 633 PG 20 WC Materials Science, Composites SC Materials Science GA QR583 UT WOS:A1995QR58300004 ER PT J AU Reeder, JR AF Reeder, JR TI Stitching vs a toughened matrix: Compression strength effects SO JOURNAL OF COMPOSITE MATERIALS LA English DT Article ID CARBON-FIBER-EPOXY; COMPOSITE-MATERIAL; SPECIMENS AB The compression strength of a stitched and a toughened matrix graphite/epoxy composite was determined and compared to a baseline unstitched untoughened composite. Two different layups with a variety of test lengths were tested under both ambient and hot/wet conditions. At longer gage lengths where failure was due to global buckling, no significant difference in strength was found between the different materials. For shorter specimens, a 30% reduction in strength due to stitching was found for both layups, presumably due to an increase in fiber misalignment. An observed increasing strength with decreasing gage length was found for all materials and was explained using statistics and a random distribution of flaws (misaligned fibers). The toughened material showed a small increase in strength over the baseline material, presumably due to the compensating effects of a more compliant matrix and straighter fibers. A hot/wet environment reduced the strength of the baseline and stitched material by 30% and the toughened material by 20%. Video images of the failing specimen supported the theory of a random distribution of flaws controlling composite failure. RP Reeder, JR (reprint author), NASA,LANGLEY RES CTR,MECH MAT BRANCH,HAMPTON,VA 23681, USA. NR 26 TC 28 Z9 32 U1 0 U2 2 PU TECHNOMIC PUBL CO INC PI LANCASTER PA 851 NEW HOLLAND AVE, BOX 3535, LANCASTER, PA 17604 SN 0021-9983 J9 J COMPOS MATER JI J. Compos Mater. PY 1995 VL 29 IS 18 BP 2464 EP 2487 PG 24 WC Materials Science, Composites SC Materials Science GA TN394 UT WOS:A1995TN39400005 ER PT J AU GATES, TS FELDMAN, M AF GATES, TS FELDMAN, M TI TIME-DEPENDENT BEHAVIOR OF A GRAPHITE THERMOPLASTIC COMPOSITE AND THE EFFECTS OF STRESS AND PHYSICAL AGING SO JOURNAL OF COMPOSITES TECHNOLOGY & RESEARCH LA English DT Article DE PHYSICAL AGING; COMPOSITE MATERIALS; VISCOELASTICITY; CREEP COMPLIANCE; SUPERPOSITION AB Experimental studies were performed to determine the effects of stress and physical aging on the matrix dominated time-dependent properties of IM7/8320 composite. Isothermal tensile creep/aging test techniques developed for polymers were adapted for testing of the composite material. Time-dependent transverse (S-22) and shear (S-66) compliance's for an orthotropic plate were found from shortterm creep compliance measurements at constant, sub-T-g temperatures. These compliance terms were shown to be affected by physical aging. Aging time shift factors and shift rates were found to be a function of temperature and applied stress. C1 OLD DOMINION UNIV,NORFOLK,VA. RP GATES, TS (reprint author), NASA,LANGLEY RES CTR,HAMPTON,VA 23665, USA. NR 9 TC 15 Z9 15 U1 0 U2 4 PU AMER SOC TESTING MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 SN 0884-6804 J9 J COMPOS TECH RES JI J. Compos. Technol. Res. PD JAN PY 1995 VL 17 IS 1 BP 33 EP 42 PG 10 WC Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA QA687 UT WOS:A1995QA68700004 ER PT J AU RADESPIEL, R SWANSON, RC AF RADESPIEL, R SWANSON, RC TI PROGRESS WITH MULTIGRID SCHEMES FOR HYPERSONIC FLOW PROBLEMS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID NAVIER-STOKES EQUATIONS; TVD SCHEMES; SOLVERS; GRIDS AB Several multigrid schemes are considered for the numerical computation of viscous hypersonic flows. For each scheme, the basic solution algorithm employs upwind spatial discretization with explicit multistage time stepping. Two-level Versions of the various multigrid algorithms ale applied to the two-dimensional advection equation, and Fourier analysis is used to determine their damping properties. The capabilities of the multigrid methods are assessed by solving three different hypersonic flow problems. Some new multigrid schemes based on semicoarsening strategies are shown to be quite effective in relieving the stiffness caused by the high-aspect-ratio cells required to resolve high Reynolds number flows. These schemes exhibit good convergence rates for Reynolds numbers up to 200 X 10(6) and Mach numbers up to 25. (C) 1995 Academic Press, Inc. C1 NASA, LANGLEY RES CTR, HAMPTON, VA 23681 USA. RP DLR, BRAUNSCHWEIG, GERMANY. NR 32 TC 25 Z9 25 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 EI 1090-2716 J9 J COMPUT PHYS JI J. Comput. Phys. PD JAN PY 1995 VL 116 IS 1 BP 103 EP 122 DI 10.1006/jcph.1995.1009 PG 20 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA QD438 UT WOS:A1995QD43800009 ER PT J AU BARBER, PG BERRY, RF DEBNAM, WJ FRIPP, AL WOODELL, G SIMCHICK, RT AF BARBER, PG BERRY, RF DEBNAM, WJ FRIPP, AL WOODELL, G SIMCHICK, RT TI GROWTH-RATES AND INTERFACE SHAPES IN GERMANIUM AND LEAD-TIN TELLURIDE OBSERVED IN-SITU, REAL-TIME IN VERTICAL BRIDGMAN FURNACES SO JOURNAL OF CRYSTAL GROWTH LA English DT Article ID CONTROLLED DIRECTIONAL SOLIDIFICATION; X-RAY RADIOGRAPHY; CRYSTAL-GROWTH; STOCKBARGER TECHNIQUE; CZOCHRALSKI GROWTH; HGCDTE ALLOYS; HEAT-FLOW; CONFIGURATION; CONVECTION; METALS AB Using the advanced technology developed to visualize the melt-solid interface in low Prandtl number materials, crystal growth rates and interface shapes have been measured in germanium and lead tin telluride semiconductors grown in vertical Bridgman furnaces. The experimental importance of using in-situ, real time observations to determine interface shapes, to measure crystal growth rates, and to improve furnace and ampoule designs is demonstrated. The interface shapes observed in-situ, in real-time were verified by quenching and mechanically induced interface demarcation, and they were also confirmed using machined models to ascertain the absence of geometric distortions. Interface shapes depended upon the interface position in the furnace insulation zone, varied with the nature of the crystal being grown, and were dependent on the extent of transition zones at the ends of the ampoule. Actual growth rates varied significantly from the constant translation rate in response to the thermophysical properties of the crystal and its melt and the thermal conditions existing in the furnace at the interface. In the elemental semiconductor germanium the observed rates of crystal growth exceeded the imposed translation rate, but in the compound semiconductor lead tin telluride the observed rates of growth were less than the translation rate. Finally, the extent of ampoule thermal loading influenced the interface positions, the shapes, and the growth rates. C1 NASA,LANGLEY RES CTR,HAMPTON,VA 23681. LOCKHEED CORP,HAMPTON,VA 23666. RP BARBER, PG (reprint author), LONGWOOD COLL,FARMVILLE,VA 23909, USA. NR 23 TC 10 Z9 12 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD JAN PY 1995 VL 147 IS 1-2 BP 83 EP 90 DI 10.1016/0022-0248(94)00431-5 PG 8 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA QD477 UT WOS:A1995QD47700013 ER PT J AU BISWAS, A AF BISWAS, A TI SOLIDIFICATION OF ACOUSTICALLY LEVITATED O-TERPHENYL CRYSTALS - A RAMAN-STUDY SO JOURNAL OF CRYSTAL GROWTH LA English DT Article ID SCATTERING; NUCLEATION; DROPLETS AB Ultrasonic levitation of millimeter size o-terphenyl (OTP) crystals was carried out in a variable temperature enclosure. Levitated crystals were melted (MP=331 K), undercooled and then seeded in order to initiate solidification. The incidence of an argon laser beam on the sample, during containerless processing, allowed elastic and low frequency (< 200 cm(-1)) shifted inelastic Raman scattering to be monitored. The Raman spectra undergo remarkable changes during thermal processing, enabling the tracking of inter-molecular structural reconfigurations occurring in the solid and liquid states. Furthermore, the Raman scattered light proved to be a reliable tool for monitoring the kinetics of phase transformation. Thus tracking the peak intensity of a Raman feature allowed a measure of volume fraction transformation rates, during solidification initiated at different undercooling levels. Growth rates as a function of undercooling were inferred from these measurements and are compared to existing models. RP BISWAS, A (reprint author), CALTECH,JET PROP LAB,MICROGRAV RES GRP MS 183-401,4800 OAK GROVE DR,PASADENA,CA 91109, USA. NR 27 TC 17 Z9 17 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD JAN PY 1995 VL 147 IS 1-2 BP 155 EP 164 DI 10.1016/0022-0248(94)00670-9 PG 10 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA QD477 UT WOS:A1995QD47700022 ER PT J AU NASON, D BIAO, Y BURGER, A AF NASON, D BIAO, Y BURGER, A TI OPTICAL METHODS FOR MEASURING IODINE VAPOR DURING MERCURIC IODIDE CRYSTAL-GROWTH BY PHYSICAL VAPOR TRANSPORT SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 8th International Conference on Vapour Growth and Epitaxy CY JUL 24-29, 1994 CL ALBERT LUDWIGS UNIV, KRISTALLOGRAPH INST, FREIBURG, GERMANY SP GERMAN ASSOC CRYSTAL GROWTH, INT ORG CRYSTAL GROWTH HO ALBERT LUDWIGS UNIV, KRISTALLOGRAPH INST ID STOICHIOMETRY AB Optical methods have been established for in-ampoule measurements of the iodine vapor concentration during the growth of mercuric iodide (HgI2) single crystals by physical vapor transport (PVT). Significant concentrations of iodine vapor, which can vary during the growth period, occur in some ampoules. The absorptivity of iodine vapor at 514 nm is 7.7 x 10(5) cm(2) mol(-1). Differential scanning calorimetry (DSC) measurements correlate with vapor absorption and indicate the presence of free crystalline iodine in vapor-grown HgI2. C1 FISK UNIV,DEPT PHYS,NASA,CTR PHOTON MAT & DEVICES,NASHVILLE,TN 37208. RP NASON, D (reprint author), EG&G ENERGY MEASUREMENTS INC,SANTA BARBARA OPERAT,GOLETA,CA 93117, USA. NR 11 TC 6 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD JAN PY 1995 VL 146 IS 1-4 BP 23 EP 28 DI 10.1016/0022-0248(94)00569-9 PG 6 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA QD187 UT WOS:A1995QD18700005 ER PT J AU SHA, YG SU, CH PALOSZ, W VOLZ, MP GILLIES, DC SZOFRAN, FR LEHOCZKY, SL LIU, HC BREBRICK, RF AF SHA, YG SU, CH PALOSZ, W VOLZ, MP GILLIES, DC SZOFRAN, FR LEHOCZKY, SL LIU, HC BREBRICK, RF TI MASS FLUX OF ZNSE BY PHYSICAL VAPOR TRANSPORT SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 8th International Conference on Vapour Growth and Epitaxy CY JUL 24-29, 1994 CL ALBERT LUDWIGS UNIV, KRISTALLOGRAPH INST, FREIBURG, GERMANY SP GERMAN ASSOC CRYSTAL GROWTH, INT ORG CRYSTAL GROWTH HO ALBERT LUDWIGS UNIV, KRISTALLOGRAPH INST ID SINGLE-CRYSTALS; PARTIAL PRESSURES; VI COMPOUNDS; GROWTH; ABSORPTION; EMISSION; AMPOULES; SILICA; GLASS; CD AB Mass fluxes of ZnSe by physical vapor transport (PVT) were measured in the temperature range of 1050 to 1160 degrees C using an in-situ dynamic technique. The starting materials were either baked out or distilled under vacuum to obtain near-congruently subliming compositions. Using an optical absorption technique Zn and Se-2 were found to be the dominant vapor species. Partial pressures of Zn and Se-2 over the starting materials at temperatures between 960 and 1140 degrees C were obtained by measuring the optical densities of the vapor phase at the wavelengths of 2138, 3405, 3508, 3613, and 3792 Angstrom. The amount and composition of the residual gas inside the experimental ampoules were measured after the run using a total pressure gauge. For the first time, the experimentally determined partial pressures of Zn and Se-2 and the amount and composition of the residual gas were used in a one-dimensional diffusion limited analysis of the mass transport rates for a PVT system. Reasonable agreement between the experimental and theoretical results was observed. C1 MARQUETTE UNIV,MAT SCI & MET PROGRAM,MILWAUKEE,WI 53233. NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,SPACE SCI LAB,HUNTSVILLE,AL 35812. NR 30 TC 15 Z9 15 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD JAN PY 1995 VL 146 IS 1-4 BP 42 EP 48 DI 10.1016/0022-0248(94)00483-8 PG 7 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA QD187 UT WOS:A1995QD18700008 ER PT J AU CIOS, KJ BAAKLINI, GY VARY, A AF CIOS, KJ BAAKLINI, GY VARY, A TI SOFT COMPUTING IN DESIGN AND MANUFACTURING OF ADVANCED MATERIALS SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT 38th International Gas Turbine and Aeroengine Congress and Exposition CY MAY 24-27, 1993 CL CINCINNATI, OH SP INT GAS TURBINE INST ID STRUCTURAL CERAMICS AB The goal of this paper is to show the potential of fuzzy sets and neural networks, often referred to as soft computing, for aiding in all aspects of manufacturing of advanced materials like ceramics. In design and manufacturing of advanced materials it is desirable to find which of the many processing variables contribute most to the desired properties of the material. There is also interest in real-time quality control of parameters that govern material properties during processing stages. This paper briefly introduces the concepts of fuzzy sets and neural networks and shows how they can be used in the design and manufacturing processes. These two computational methods are alternatives to other methods such as the Taguchi method. The two methods are demonstrated by using data collected at NASA Lewis Research Center Future research directions are also discussed. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RP CIOS, KJ (reprint author), UNIV TOLEDO,2801 W BANCROFT ST,TOLEDO,OH 43606, USA. NR 12 TC 1 Z9 1 U1 0 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0742-4795 J9 J ENG GAS TURB POWER JI J. Eng. Gas. Turbines Power-Trans. ASME PD JAN PY 1995 VL 117 IS 1 BP 161 EP 165 DI 10.1115/1.2812766 PG 5 WC Engineering, Mechanical SC Engineering GA QF794 UT WOS:A1995QF79400024 ER PT J AU BARRETT, TS PALAZZOLO, AB KASCAK, AF AF BARRETT, TS PALAZZOLO, AB KASCAK, AF TI ACTIVE VIBRATION CONTROL OF ROTATING MACHINERY USING PIEZOELECTRIC ACTUATORS INCORPORATING FLEXIBLE CASING EFFECTS SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT 38th International Gas Turbine and Aeroengine Congress and Exposition CY MAY 24-27, 1993 CL CINCINNATI, OH SP INT GAS TURBINE INST ID SYSTEMS AB The modem trend toward lighter and more flexible designs in rotating machinery brings with it increasing demands for ways to dissipate the excess Energy transferred to such structures by the action of dynamic forces. The present study incorporates the use of active feedback control mechanisms to suppress this unwanted vibration. The basic active damping scheme involves the introduction of a control force on the structure from a feedback network whose input is dictated by the motion of the structure. The control force is applied to the rotor bearing support housing via a piezoelectric actuator attached to the rotor casing. The current research extends previous electromechanical simulations by incorporating a flexible finite element shell model of the casing to support the actuator and sensors. Actuator and feedback loop dynamics are included in the stability and response simulation. C1 NASA,LEWIS RES CTR,USA,CLEVELAND,OH 44135. RP BARRETT, TS (reprint author), TEXAS A&M UNIV,DEPT MECH ENGN,COLLEGE STN,TX 77840, USA. NR 19 TC 7 Z9 7 U1 0 U2 2 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0742-4795 J9 J ENG GAS TURB POWER JI J. Eng. Gas. Turbines Power-Trans. ASME PD JAN PY 1995 VL 117 IS 1 BP 176 EP 187 DI 10.1115/1.2812770 PG 12 WC Engineering, Mechanical SC Engineering GA QF794 UT WOS:A1995QF79400027 ER PT J AU FREED, AD WALKER, KP AF FREED, AD WALKER, KP TI VISCOPLASTIC MODEL DEVELOPMENT WITH AN EYE TOWARD CHARACTERIZATION SO JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Article ID POWER-LAW CREEP; DEFORMATION; STRESS AB A viscoplastic theory is developed that reduces analytically to creep theory under steady-state conditions. A viscoplastic model is constructed within this theoretical framework by defining material functions that have close ties to the physics of inelasticity. As a consequence, this model is easily characterized-only steady-state creep data, monotonic stress-strain curves, and saturated stress-strain hysteresis loops are required. The model is applied to the copper alloy NARloy Z. C1 ENGN SCI SOFTWARE INC,SMITHFIELD,RI 02917. RP FREED, AD (reprint author), NASA,LEWIS RES CTR,CLEVELAND,OH 44135, USA. OI Freed, Alan/0000-0002-3492-0628 NR 26 TC 9 Z9 9 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0094-4289 J9 J ENG MATER-T ASME JI J. Eng. Mater. Technol.-Trans. ASME PD JAN PY 1995 VL 117 IS 1 BP 8 EP 13 DI 10.1115/1.2804377 PG 6 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA QE356 UT WOS:A1995QE35600002 ER PT J AU LANGEL, RA BALDWIN, RT GREEN, AW AF LANGEL, RA BALDWIN, RT GREEN, AW TI TOWARD AN IMPROVED DISTRIBUTION OF MAGNETIC OBSERVATORIES FOR MODELING OF THE MAIN GEOMAGNETIC-FIELD AND ITS TEMPORAL CHANGE SO JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY LA English DT Article ID MAGSAT DATA; UNCERTAINTY AB The magnetic field from Earth's core (the main field) is a global phenomena with measurable temporal variations with periods ranging from one year to millennia. Geomagnetic studies are thus heavily dependent on the availability of data well distributed over the globe and acquired over long periods of time. Satellite data provide the best geographic coverage, but are unlikely to be available except possibly at intervals of 10 to 30 years. Accurate mapping of the main field over long periods of time is mostly dependent upon a network of geomagnetic observatories, each of which contributes continuous, three-component, data of high accuracy. The overall accuracy of knowledge of the main field depends both upon the adequacy of the geographic distribution of those observatories and on the existence of periodic surveys by satellite. Analysis of models based on the existing observatory distribution reveals large geographic regions in which their accuracy is degraded such that studies of the field, its source dynamo, etc. are seriously limited. Model accuracy is studied for three distributions of 92, 162, and 252 equally spaced observatory sites and for degradation of those distributions by a large area with no data. The 92-site distribution is the most economically realistic. Expansion of the existing network so that a subset of observatories approximates this 92-site distribution can be accomplished by a phased program of collocating magnetometers at 20 sites already established, or now planned, for other geophysical networks such as FLINN, GEOSCOPE, IDA, and IRIS, at 10 additional land or island sites, and at 8 sea bottom sites. Specific locations for these sites are proposed. While not meeting all of the needs for study of current problems in geomagnetism, if implemented, this extension of the current observatory network would form a firm foundation for most such studies. Such implementation will only be accomplished if the burden for doing so is partially shouldered by most or all of the national agencies and organizations representing data users and if such users unit in expressing their own need. C1 HUGHES STX CORP,LANHAM,MD 20706. US GEOL SURVEY,GOLDEN,CO 80401. RP LANGEL, RA (reprint author), NASA,GODDARD SPACE FLIGHT CTR,GEODYNAM BRANCH,GREENBELT,MD 20771, USA. NR 18 TC 9 Z9 9 U1 0 U2 2 PU TERRA SCIENTIFIC PUBL CO PI TOKYO PA 302 JIYUGAOKA-KOMATSU BLDG 24-17 MIDORIGAOKA 2-CHOME, TOKYO TOKYO 152, JAPAN SN 0022-1392 J9 J GEOMAGN GEOELECTR JI J. Geomagn. Geoelectr. PY 1995 VL 47 IS 5 BP 475 EP 508 PG 34 WC Geosciences, Multidisciplinary SC Geology GA RM108 UT WOS:A1995RM10800004 ER PT J AU Baker, DN Klimas, AJ Vassiliadis, DV AF Baker, DN Klimas, AJ Vassiliadis, DV TI Energy transfer between the solar wind and the magnetosphere-ionosphere system SO JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY LA English DT Article; Proceedings Paper CT SCOSTEP 8th Quadrennial-Solar Terrestrial Physics Symposium CY JUN 05-19, 1994 CL SENDAI, JAPAN SP Sci Council Japan, SCOSTEP, Special Comm STEP, Tohoku Univ, Int Assoc Geomagnetism & Aeron, Int Assoc Meteorol & Atmospher Sci, Int Union Radio Sci, COSPAR, IUPAP, Soc Geomagnetism & Earch & Space Sci ID GEOMAGNETIC-ACTIVITY; TIME-SERIES; SUBSTORMS; CHAOS; MODEL; AE AB The coupling of energy between the solar wind and the magnetosphere has been studied using many different techniques. Early research used simple statistical methods and cross-correlation analyses. Such work suggested that solar wind-magnetosphere coupling is strongly controlled by the interplanetary electric field (-V x B). Later studies have used more sophisticated techniques such as linear prediction filtering to understand quantitatively the time scales and efficiency of such coupling. In fact, there emerge two distinct aspects and time scales for coupling processes: (1) Directly-driven ionospheric dissipation with response time scales of 10-20 min.; and (2) Storage-release mechanisms involving energy loading in the magnetotail for similar to 1 hour. Very recent research has used nonlinear dynamical models and nonlinear filter techniques to incorporate both directly driven and loading-unloading behavior. The result is that very accurate predictions of magnetosphere-ionosphere response are possible using state-input space reconstruction and ''nearest neighbor'' nonlinear filters. C1 NASA,GODDARD SPACE FLIGHT CTR,EXTRATERR PHYS LAB,GREENBELT,MD 20771. RP Baker, DN (reprint author), UNIV COLORADO,ATMOSPHER & SPACE PHYS LAB,BOULDER,CO 80309, USA. NR 17 TC 4 Z9 4 U1 0 U2 2 PU TERRA SCIENTIFIC PUBL CO PI TOKYO PA 302 JIYUGAOKA-KOMATSU BLDG 24-17 MIDORIGAOKA 2-CHOME, TOKYO TOKYO 152, JAPAN SN 0022-1392 J9 J GEOMAGN GEOELECTR JI J. Geomagn. Geoelectr. PY 1995 VL 47 IS 11 BP 1171 EP 1182 PG 12 WC Geosciences, Multidisciplinary SC Geology GA TZ558 UT WOS:A1995TZ55800020 ER PT J AU Goldberg, RA Baker, DN Herrero, FA Jackman, CH Kanekal, S Twigg, PA AF Goldberg, RA Baker, DN Herrero, FA Jackman, CH Kanekal, S Twigg, PA TI Mesospheric heating during highly relativistic electron precipitation events SO JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY LA English DT Article; Proceedings Paper CT SCOSTEP 8th Quadrennial-Solar Terrestrial Physics Symposium CY JUN 05-19, 1994 CL SENDAI, JAPAN SP Sci Council Japan, SCOSTEP, Special Comm STEP, Tohoku Univ, Int Assoc Geomagnetism & Aeron, Int Assoc Meteorol & Atmospher Sci, Int Union Radio Sci, COSPAR, IUPAP, Soc Geomagnetism & Earch & Space Sci ID SOLAR PROTON EVENT; MIDDLE ATMOSPHERE; JULY 13; OZONE DEPLETION AB Highly relativistic electron precipitation (HRE) events which occur in the mid-latitude and auroral regions last 2.5 days on the average, peaking in the magnetosphere daily near local noon. Furthermore, they can recur every 27 days for several synodic solar rotation periods, and become most intense and frequent during the minimum of the solar cycle. These events are described in terms of their spatial and temporal extent and their spectral characteristics. A detailed sounding rocket study of a relatively weak event in May, 1990 at Poker Flat, Alaska gave energy depositions from which modeling calculations have yielded O-3 depletion estimates in excess of 25% near 75 km altitude. These depletions would hardly affect the UV flux reaching the stratosphere below, but could alter the thermal balance in the 60-75 km altitude region in the mesosphere. Further analysis for that HRE has shown the possibility of Joule heating effects near the polar cusp of up to 3 degrees/day depending on the magnitude of the electric field. The mesospheric healing caused by more intense events studied with SAMPEX (Solar Anomalous Magnetospheric Particle Explorer) is compared with the earlier May 1990 event to demonstrate the global impact of HRE events on the chemical and thermal characteristics of the neutral atmosphere. RP Goldberg, RA (reprint author), NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771, USA. RI Goldberg, Richard /E-1881-2012; Jackman, Charles/D-4699-2012 NR 25 TC 7 Z9 7 U1 0 U2 0 PU TERRA SCIENTIFIC PUBL CO PI TOKYO PA 302 JIYUGAOKA-KOMATSU BLDG 24-17 MIDORIGAOKA 2-CHOME, TOKYO TOKYO 152, JAPAN SN 0022-1392 J9 J GEOMAGN GEOELECTR JI J. Geomagn. Geoelectr. PY 1995 VL 47 IS 11 BP 1237 EP 1247 PG 11 WC Geosciences, Multidisciplinary SC Geology GA TZ558 UT WOS:A1995TZ55800027 ER PT J AU ANDERSON, KA SOMMERS, J LIN, RP PICK, M CHAIZY, P MURPHY, N SMITH, EJ PHILLIPS, JL AF ANDERSON, KA SOMMERS, J LIN, RP PICK, M CHAIZY, P MURPHY, N SMITH, EJ PHILLIPS, JL TI MIRRORING OF FAST SOLAR-FLARE ELECTRONS ON A DOWNSTREAM COROTATING INTERACTION REGION SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID EVENTS AB We discuss an example of confinement of fast solar electrons by a discrete solar wind-interplanetary magnetic field structure on February 22, 1991. The structure is about 190,000 km in width and is clearly defined by changes in the direction of the magnetic field at the Ulysses spacecraft. This structure carries electrons moving toward the Sun as well as away from the Sun. A loss cone in the angular distribution of the fast electrons shows that mirroring, presumably magnetic, tal;es place downstream from the spacecraft. Following passage of this narrow structure, the return flux vanishes for 21 mill after which time the mirroring resumes and persists for several hours. We identify the enhanced magnetic field region lying downstream from the Ulysses spacecraft that is responsible for the mirroring to be a corotating stream interaction region. Backstreaming suprathermal electron measurements by the Los Alamos National Laboratory plasma experiment on the Ulysses spacecraft support this interpretation. C1 OBSERV PARIS,CNRS,ERS 076,F-92190 MEUDON,FRANCE. RUTHERFORD APPLETON LAB,DEPT SPACE SCI,DIDCOT OX11 0QX,OXON,ENGLAND. CALTECH,JET PROP LAB,PASADENA,CA 91109. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP ANDERSON, KA (reprint author), UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720, USA. NR 12 TC 14 Z9 14 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 JAN 1 PY 1995 VL 100 IS A1 BP 3 EP 11 DI 10.1029/94JA01811 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA QF783 UT WOS:A1995QF78300002 ER PT J AU CAIRNS, IH FAIRFIELD, DH ANDERSON, RR CARLTON, VEH PAULARENA, KI LAZARUS, AJ AF CAIRNS, IH FAIRFIELD, DH ANDERSON, RR CARLTON, VEH PAULARENA, KI LAZARUS, AJ TI UNUSUAL LOCATIONS OF EARTHS BOW SHOCK ON SEPTEMBER 24-25, 1987 - MACH NUMBER EFFECTS SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID SOLAR-WIND; MAGNETOPAUSE; WAVES; SHAPE; MOTION; VENUS AB ISEE 1 and IMP 8 data are used to identify 19 crossings of Earth's bow shock during a 30-hour period following 0000 UT on September 24, 1987. Apparent standoff distances for the shock are calculated for each crossing using two methods and the spacecraft location; one method assumes the average shock shape, while the other assumes a ram pressure-dependent shock shape. The shock's apparent standoff distance, normally similar to 14 R(E), is shown to increase from near 10 R(E) initially to near 19 R(E) during an 8-hour period, followed by an excursion to near 35 R(E) (where two IMP 8 shock crossings occur) and an eventual return to values smaller than 19 R(E). The Alfven M(A) and fast magnetosonic M(ms) Mach numbers remain above 2 and the humber density above 4 cm(-3) for almost the entire period. Ram pressure effects produce the initial near-Earth shock location, whereas expansions and contractions of the bow shock due to low Mach number effects account, qualitatively and semiquantitatively, for the timing and existence of almost all the remaining ISEE crossings and both IMP 8 crossings. Significant quantitative differences exist between the apparent standoff distances for the shock crossings and those predicted using the observed plasma parameters and the standard model based on Spreiter et al.'s (1966) gasdynamic equation. These differences can be explained in terms of either a different dependence of the standoff distance on Mach number at low M(A) and M(ms), or variations in shock shape with M(A) and M(ms) (becoming increasingly ''puffed up'' with decreasing M(A) and M(ms), as expected theoretically), or by a combination of both effects. Global MHD simulations, to be presented elsewhere, confirm that both effects occur and are significant. Ram pressure-induced changes in the shock's shape are discussed but found to be quantitatively unimportant for the shock crossings analyzed. Approximate estimates of both the deviation of the shock's standoff distance from the standard model and of the shock's shape are determined independently (but not consistently) for M(ms)similar to 2.4. The estimates imply substantial changes in standoff distance and/or shock shape at low M(A) and M(ms). Mach number effects can therefore be quantitatively important in determining and predicting the shape and location of the bow shock, even when M(A) and M(ms) remain above 2. This study confirms and generalizes previous studies of Mach number effects on Earth's bow shock. Statistical studies and simulations of the bow shock's shape and location should be performed as a function of Mach number, magnetic field orientation, and ram pressure. C1 MIT,CTR SPACE RES,CAMBRIDGE,MA 02139. NASA,GODDARD SPACE FLIGHT CTR,EXTRATERR PHYS LAB,GREENBELT,MD 20771. RP CAIRNS, IH (reprint author), UNIV IOWA,DEPT PHYS & ASTRON,VAN ALLEN HALL,IOWA CITY,IA 52242, USA. NR 25 TC 59 Z9 58 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 JAN 1 PY 1995 VL 100 IS A1 BP 47 EP 62 DI 10.1029/94JA01978 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA QF783 UT WOS:A1995QF78300006 ER PT J AU KUZNETSOVA, MM ROTH, M AF KUZNETSOVA, MM ROTH, M TI THRESHOLDS FOR MAGNETIC PERCOLATION THROUGH THE MAGNETOPAUSE CURRENT LAYER IN ASYMMETRICAL MAGNETIC-FIELDS SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID FLUX-TRANSFER EVENTS; X-LINE RECONNECTION; HYBRID DRIFT INSTABILITY; DAYSIDE MAGNETOPAUSE; SOLAR-WIND; MAGNETOSPHERE INTERACTION; PATCHY RECONNECTION; KINETIC-THEORY; TEARING MODES; PLASMA-WAVES AB The Vlasov kinetic approach is used to study the stability of magnetic surfaces with respect to spontaneous excitation of collisionless tearing perturbations within magnetopause current layers (MCLs) with asymmetrical magnetic field profiles. For the unperturbed configuration a ''tractable'' (that is, with a minimum number of free parameters) Vlasov equilibrium model describing a tangential discontinuity is developed. In this model, asymmetrical MCLs are not electrostatically equipotential configurations and their structure is only determined by the angle of the magnetic field rotation Bo and the magnetic field asymmetry factor kappa(B) = (B-2 - B-1)/B-2, where B-1 and B-2 are the magnetic field intensities in the adjacent magnetosheath and magnetospheric regions, respectively. The stochastic percolation model by Galeev et al. (1986), based on the symmetrical charge-neutral Harris equilibrium, is generalized for asymmetrical MCLs. Asymmetry in the B field profile strongly modifies the dependence of the marginal MCL thickness (below which the MCL is subjected to percolation) on the polarity of the interplanetary magnetic field (IMF). For a northward IMF (theta 0 < 90 degrees), the percolation is impossible when kappa(B) greater than or equal to 0.4, while for moderate values of kappa(B) (0.15 less than or equal to kappa(B) < 0.4) only thin MCLs can be percolated. When kappa(B) > 0.3, the maximum thickness of MCLs subjected to percolation is achieved for theta 0 > 90 degrees, that is, for a southward IMF. Assuming that the magnetopause should, on the average, be close to its stability threshold, realistic asymmetrical MCLs (with kappa(B) > 0.3) should be thinner for a northward IMF than for a southward IMF. C1 RUSSIAN ACAD SCI,SPACE RES INST,MOSCOW,RUSSIA. INST AERON SPATIALE BELGIQUE,B-1180 BRUSSELS,BELGIUM. RP KUZNETSOVA, MM (reprint author), NASA,GODDARD SPACE FLIGHT CTR,EXTRATERR PHYS LAB,ELECTRODYNAM BRANCH,GREENBELT,MD 20771, USA. RI Kuznetsova, Maria/F-6840-2012 NR 68 TC 10 Z9 10 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 JAN 1 PY 1995 VL 100 IS A1 BP 155 EP 174 DI 10.1029/94JA02329 PG 20 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA QF783 UT WOS:A1995QF78300013 ER PT J AU OWEN, CJ SLAVIN, JA RICHARDSON, IG MURPHY, N HYNDS, RJ AF OWEN, CJ SLAVIN, JA RICHARDSON, IG MURPHY, N HYNDS, RJ TI AVERAGE MOTION, STRUCTURE AND ORIENTATION OF THE DISTANT MAGNETOTAIL DETERMINED FROM REMOTE-SENSING OF THE EDGE OF THE PLASMA SHEET BOUNDARY-LAYER WITH E-GREATER-THAN-35 KEV IONS SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Review ID DEEP GEOMAGNETIC TAIL; TRAVELING COMPRESSION REGIONS; NEAR-EARTH; MAGNETIC-FIELD; ENERGETIC IONS; NEUTRAL SHEET; ISEE-3 OBSERVATIONS; SUBSTORM; MAGNETOSPHERE; IMF AB In this paper, we study gradients of the energetic ion intensity observed at the edge of the plasma sheet boundary layer (PSBL) by the energetic ion anisotropy spectrometer (EPAS) on ISEE 3. In particular, we have determined the velocity of the boundary relative to the spacecraft in the direction Perpendicular to the tail axis and the angle which the boundary normal makes to the spacecraft spin axis for 1160 PSBL encounters at X(GSM) > -240 R(E). By assuming that, on average, the edge of the PSBL is parallel to the cross-tail current sheet, we are then able to determine a number of properties of the structure, orientation and motion of the deep geomagnetic tail. We conclude the following: (1) Most crossings of the edge of the PSBL are caused by transverse motion of the entire tail induced by solar wind direction variations, although some are caused by reconfiguration of the tail due to geomagnetic activity. (2) The typical velocity of the PSBL (and hence of the tail) in a direction perpendicular to the tail axis is 50-85 km s(-1). (3) The average twist of the tail is near zero, with the edge of the PSBL (and by inference the cross-tail current sheet) lying parallel to the ecliptic plane (however, large twists are found in individual events and the distribution of twists is broad, with one standard deviation of similar to 50 degrees. (4) The width of the distribution decreases with downtail distance. (5) The variation of the distributions with cross-tail position reveals that this decrease in width is most likely due to the edge of the PSBL being concave, or significantly flared at the tail flanks, in the near-Earth region. This flaring is absent further downtail. In fact, at X(GSM) < -200 R(E), the combined thickness of the plasma sheet and PSBL may be greatest at the tail centre and reduced towards the flanks. (6) During days on which the IMF has ''away'' sector structure, the north lobe of the tail is twisted on average towards dawn by 7.0 +/- 2.4 degrees. (7) During days on which the IMF has ''toward'' sector structure, the north lobe is tilted towards dusk by 3.8 +/- 2.3 degrees. (8) A subset of events for which IMP 8 solar wind data are available show that, for southward IMF B-Z, the tail has a mean twist of -12.3 +/- 5.0 degrees for IMF B-y > 0 and 5.5 +/- 3.8 degrees for IMF B-Y < 0 (positive twist angles correspond to a tilt of the northern lobe towards dusk). (9) For northward IMF B-Z, the tail has a twist of -23.9 +/- 5.0 degrees for IMF B-y > 0 and 13.4 +/- 6.0 degrees for IMF B-y < 0. Hence the tail appears more twisted on average for the IMF B-Z northward case. (10) The distribution of tail twists is wider for lower levels of geomagnetic activity, indicating that the tail is able to twist more at lower levels of activity. (11) The data set reveals no evident effect of the Earth's dipole wobble; tail orientation appears to be controlled by the solar wind and IMF, such that the GSE coordinate system may be appropriate for the study of field and plasma structures in the distant tail region. C1 HUGHES STX CORP,LANHAM,MD. NASA,GODDARD SPACE FLIGHT CTR,HIGH ENERGY ASTROPHYS LAB,GREENBELT,MD 20771. UNIV MARYLAND,DEPT ASTRON,COLLEGE PK,MD 20742. CALTECH,JET PROP LAB,PASADENA,CA 91109. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,BLACKETT LAB,SPACE & ATMOSPHER PHYS GRP,LONDON SW7 2BZ,ENGLAND. RP OWEN, CJ (reprint author), NASA,GODDARD SPACE FLIGHT CTR,EXTRATERR PHYS LAB,CODE 696,GREENBELT,MD 20771, USA. RI Owen, Christopher/C-2999-2008; Slavin, James/H-3170-2012; OI Owen, Christopher/0000-0002-5982-4667; Slavin, James/0000-0002-9206-724X; Richardson, Ian/0000-0002-3855-3634 NR 108 TC 42 Z9 42 U1 1 U2 5 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 JAN 1 PY 1995 VL 100 IS A1 BP 185 EP 204 DI 10.1029/94JA02417 PG 20 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA QF783 UT WOS:A1995QF78300015 ER PT J AU CRAVEN, PD COMFORT, RH RICHARDS, PG GREBOWSKY, JM AF CRAVEN, PD COMFORT, RH RICHARDS, PG GREBOWSKY, JM TI COMPARISONS OF MODELED N+, O+, H+, AND HE+ IN THE MIDLATITUDE IONOSPHERE WITH MEAN DENSITIES AND TEMPERATURES FROM ATMOSPHERE EXPLORER SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID ION-MASS SPECTROMETER; TOPSIDE IONOSPHERE; F-REGION; PLASMASPHERE; HEIGHT; DISTRIBUTIONS; NITROGEN; FIELD; WINDS; FLUX AB In this study, Atmosphere Explorer data and model results for the ion and electron temperature and the density of N+, O+, H+, and He+ between 120 and 1400 km altitude are compared for two midlatitude ranges (L=2 and L=4), noon and midnight local time, winter and summer, at solar minimum. The data for the heavy atomic ions (O+ and N+) show that their densities are greater at noon than at midnight for a given season and greater in summer than winter for a given local time. There is only a weak latitudinal variation in the density of these ions. The data show that the light ion (H+ and He+) densities are greater at midnight than at noon and are generally greater in winter than summer. There is a strong latitudinal variation of the light ion densities, with the densities decreasing with increasing latitude. The model densities are in good agreement with the AE densities for N+, O+, and H+. Model He+ densities are lower, by a factor of 2 or more, than the measured densities. Model ion and electron temperatures agree well with the measured temperatures with only a modest increase in plasmaspheric heating. C1 UNIV ALABAMA,CTR SPACE PLASMA & AERONOM RES,HUNTSVILLE,AL 35899. NASA,GODDARD SPACE FLIGHT CTR,ATMOSPHERES LAB,GREENBELT,MD 20771. RP CRAVEN, PD (reprint author), NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,SPACE SCI LAB,HUNTSVILLE,AL 35812, USA. RI Grebowsky, Joseph/I-7185-2013 NR 44 TC 24 Z9 24 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 JAN 1 PY 1995 VL 100 IS A1 BP 257 EP 268 DI 10.1029/94JA02306 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA QF783 UT WOS:A1995QF78300022 ER PT J AU MACAYEAL, DR BINDSCHADLER, RA SCAMBOS, TA AF MACAYEAL, DR BINDSCHADLER, RA SCAMBOS, TA TI BASAL FRICTION OF ICE-STREAM-E, WEST ANTARCTICA SO JOURNAL OF GLACIOLOGY LA English DT Article ID FLOW AB We use surface velocity derived from sequential Landsat imagery and a control method to estimate the basal-friction distribution of a major West Aatarctic ice stream. The area-averaged basal stress is approximately 1.4 x 10(4) Pa, or about 29% of the area-averaged driving stress of 4.9 x 10(4) Pa. Uncertainty of the derived area-averaged basal stress is difficult to assess and depends primarily on spatial variation of the flow-law rate factor in the constitutive law. Spatial variation associated with depth-averaged temperature variation gives an uncertainty of approximately +/-10(3) Pa. Approximately 60% of the ice stream has a basal-stress magnitude less than 10(4) Pa, and approximately 30% has less than 10(3) Pa. These characteristics suggest the presence of a mechanically weak, water-charged subglacial till. Small-scale sticky spots where basal friction exceeds the area-averaged driving stress are scattered irregularly across the subglacial regime and comprise approximately 15% of the ice-stream area. Sticky spots cluster in regions where Landsat imagery suggests structural features in the underlying bedrock. C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. UNIV COLORADO,CIRES,NATL SNOW & ICE DATA CTR,BOULDER,CO 80209. RP MACAYEAL, DR (reprint author), UNIV CHICAGO,DEPT GEOPHYS SCI,CHICAGO,IL 60637, USA. RI Scambos, Ted/B-1856-2009; OI MacAyeal, Douglas/0000-0003-0647-6176 NR 26 TC 69 Z9 69 U1 0 U2 7 PU INT GLACIOL SOC PI CAMBRIDGE PA LENSFIELD RD, CAMBRIDGE, ENGLAND CB2 1ER SN 0022-1430 J9 J GLACIOL JI J. Glaciol. PY 1995 VL 41 IS 138 BP 247 EP 262 PG 16 WC Geography, Physical; Geosciences, Multidisciplinary SC Physical Geography; Geology GA RT567 UT WOS:A1995RT56700004 ER PT J AU LISTON, GE HALL, DK AF LISTON, GE HALL, DK TI AN ENERGY-BALANCE MODEL OF LAKE-ICE EVOLUTION SO JOURNAL OF GLACIOLOGY LA English DT Article ID LONG-WAVE-RADIATION; SEA ICE; TEMPERATURE; ATMOSPHERE; SIMULATION; FORMULA AB A physically based mathematical model of the coupled lake, lake ice, snow and atmosphere system is developed for studying terrestrial-atmospheric interactions in high-elevation and high-latitude regions. The ability to model lake-ice freeze-up, break-up, total ice thickness and ice type offers the potential to describe the effects of climate change in these regions. Model output is validated against lake-ice observations made during the winter of 1992-93 in Glacier National Park, Montana, U.S.A. The model is driven with observed daily atmospheric forcing of precipitation, wind speed and air temperature. In addition to simulating complete energy-balance components over the annual cycle, model output includes ice freeze-up and break-up dates, and the end-of-season clear ice, snow-ice and total ice depths for two nearby lakes in Glacier National Park, each in a different topographic setting. Modeled ice features are found to agree closely with the lake-ice observations. Model simulations illustrate the key role that the wind component of the local climatic regime plays on the growth and decay of lake ice. The wind speed affects both the surface temperature and the accumulation of snow on the lake-ice surface. Higher snow accumulations on the lake ice depress the ice surface below the water line, causing the snow to become saturated and leading to the formation of snow-ice deposits. In regions having higher wind speeds, significantly less snow accumulates on the lake-ice surface, thus limiting snow-ice formation. The ice produced hy these two different mechanisms has distinctly different optical and radiative properties, and affects the monitoring of frozen lakes using remote-sensing techniques. C1 NASA, GODDARD SPACE FLIGHT CTR, HYDROL SCI BRANCH, GREENBELT, MD 20771 USA. RI Hall, Dorothy/D-5562-2012 NR 42 TC 87 Z9 89 U1 1 U2 10 PU INT GLACIOL SOC PI CAMBRIDGE PA LENSFIELD RD, CAMBRIDGE, ENGLAND CB2 1ER SN 0022-1430 J9 J GLACIOL JI J. Glaciol. PY 1995 VL 41 IS 138 BP 373 EP 382 PG 10 WC Geography, Physical; Geosciences, Multidisciplinary SC Physical Geography; Geology GA RT567 UT WOS:A1995RT56700013 ER PT J AU CAVALIERI, DJ STGERMAIN, KM SWIFT, CT AF CAVALIERI, DJ STGERMAIN, KM SWIFT, CT TI REDUCTION OF WEATHER EFFECTS IN THE CALCULATION OF SEA-ICE CONCENTRATION WITH THE DMSP SSM/I SO JOURNAL OF GLACIOLOGY LA English DT Article ID MULTICHANNEL MICROWAVE RADIOMETER; RETRIEVAL; OCEAN AB A problem in mapping the polar sea-ice covers in both hemispheres has been the sporadic false indication of sea ice over the open ocean and at the ice edge. These spurious sea-ice concentrations result from variations in sea-surface roughening by surface winds, atmospheric water vapor and both precipitating and non-precipitating liquid water. This problem was addressed for sea-ice concentrations derived from the Nimbus-7 scanning multi-channel microwave radiometer (SMMR) data through the development of a weather filter based on spectral information from the 18.0 and 37.0 GHz vertical polarization SMMR channels. Application of a similar filter for use with sea-ice concentration maps derived with the special-sensor microwave imager (SSM/I) sensor is less successful. This results from the position of the 19.35 GHz SSM/I channels, which are closer to the center of the 22.2 GHz atmospheric water-vapor line than are the SMMR 18.0 GHz channels. Thus, the SSM/I 19.35 GHz channels are more sensitive to changes in atmospheric water vapor, which results in greater contamination problems. An additional filter had been developed, based on a combination of the 19.35 and 22.2 GHz SSM/I channels. Examples of the effectiveness of the new filter are presented and limitations are discussed. C1 UNIV NEBRASKA,DEPT ELECT ENGN,LINCOLN,NE 68588. UNIV MASSACHUSETTS,DEPT ELECT & COMP ENGN,AMHERST,MA 01003. RP CAVALIERI, DJ (reprint author), NASA,GODDARD SPACE FLIGHT CTR,HYDROSPHER PROC LAB,CODE 971,GREENBELT,MD 20771, USA. NR 10 TC 61 Z9 65 U1 1 U2 10 PU INT GLACIOL SOC PI CAMBRIDGE PA LENSFIELD RD, CAMBRIDGE, ENGLAND CB2 1ER SN 0022-1430 J9 J GLACIOL JI J. Glaciol. PY 1995 VL 41 IS 139 BP 455 EP 464 PG 10 WC Geography, Physical; Geosciences, Multidisciplinary SC Physical Geography; Geology GA TG871 UT WOS:A1995TG87100003 ER PT J AU SCHROEDER, JA TISCHLER, MB WATSON, DC ESHOW, MM AF SCHROEDER, JA TISCHLER, MB WATSON, DC ESHOW, MM TI IDENTIFICATION AND SIMULATION EVALUATION OF A COMBAT HELICOPTER IN HOVER SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Article ID VERTICAL RESPONSE; DISPLAY DYNAMICS; FLIGHT; VALIDATION AB Frequency-domain parameter identification techniques were used to develop a hover mathematical model of the AH-64 Apache helicopter from flight data. The unstable AH-64 bare-airframe characteristics, without a stability augmentation system, were parameterized in the conventional stability-derivative form. To improve the model's vertical response, a simple transfer-function model approximating the effects of dynamic inflow was developed. The model, with and without stability augmentation, was then evaluated by AH-64 pilots in a moving-base simulation. It was the opinion of the pilots that the simulation was a satisfactory representation of the aircraft for the tasks of interest. The principal negative comment was that height control was more difficult in the simulation than in the aircraft. C1 USA,AEROFLIGHTDYNAM DIRECTORATE,MOFFETT FIELD,CA 94035. RP SCHROEDER, JA (reprint author), NASA,AMES RES CTR,DIV FLIGHT SYST & SIMULAT RES,MOFFETT FIELD,CA 94035, USA. NR 15 TC 4 Z9 4 U1 0 U2 1 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 JAN-FEB PY 1995 VL 18 IS 1 BP 31 EP 38 DI 10.2514/3.56653 PG 8 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA QL301 UT WOS:A1995QL30100005 ER PT J AU AHEARN, DG SIMMONS, RB PRICE, DL AJELLO, L CROW, SA MISHRA, SK PIERSON, DL AF AHEARN, DG SIMMONS, RB PRICE, DL AJELLO, L CROW, SA MISHRA, SK PIERSON, DL TI FUNGAL COLONIZATION OF SYNTHETIC SUBSTRATES FOR USE IN-SPACE CRAFT SO JOURNAL OF INDUSTRIAL MICROBIOLOGY LA English DT Article DE FUNGAL COLONIZATION; SPACE CRAFT MATERIALS; ACREMONIUM OBCLAVATUM AB Materials being used or considered for use in space Rights were examined for their susceptibility to fungal colonization. The materials included soft goods (clothing) and insulation and fabrication products such as Velcro(R) attachments and elastic cord binders. Materials were exposed for at least 28 days in a high-humidity chamber colonized with over 50 species of fungi, including those species recommended for determining recalcitrance of materials to fungal biodegradation. Al least nine of 25 products demonstrated extensive microscopic colonization by fungi, mostly by Acremonium obclavatum. Challenge procedures that rely on observations with the unaided eye, or 40 x magnification of growth by a restricted number of fungal species with a cellulosic substrate as a positive control, are insufficient for determining the resistance of synthetic substrates to fungal colonization. C1 INTERFACE RES CORP,KENNESAW,GA. EMORY UNIV,DEPT OPHTHALMOL,ATLANTA,GA 30322. KRUG LIFE SCI,HOUSTON,TX. NASA,LYNDON B JOHNSON SPACE CTR,BIOMED OPERAT & RES BRANCH,HOUSTON,TX 77058. RP AHEARN, DG (reprint author), GEORGIA STATE UNIV,DEPT BIOL,POB 4010,ATLANTA,GA 30302, USA. NR 9 TC 4 Z9 4 U1 0 U2 2 PU STOCKTON PRESS PI BASINGSTOKE PA HOUNDMILLS, BASINGSTOKE, HANTS, ENGLAND RG21 2XS SN 0169-4146 J9 J IND MICROBIOL JI J. Indust. Microbiol. PD JAN PY 1995 VL 14 IS 1 BP 26 EP 30 DI 10.1007/BF01570062 PG 5 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA RF467 UT WOS:A1995RF46700006 PM 7766064 ER PT J AU PAL, SK LEIGH, AB AF PAL, SK LEIGH, AB TI MOTION FRAME ANALYSIS AND SCENE ABSTRACTION - DISCRIMINATION ABILITY OF FUZZINESS MEASURES SO JOURNAL OF INTELLIGENT & FUZZY SYSTEMS LA English DT Article ID FUZZY GEOMETRY AB This article addresses a solution to the problem of scene estimation/abstraction of motion video data in the fuzzy set theoretic framework. Using various fuzzy geometrical and information measures as image features, an algorithm is developed to compute the change of information in each of two successive frames to classify scenes/frames. Frame similarity is measured in terms of weighted distance in fuzzy feature space. This categorization process of raw input visual data can be wed to establish structure for correlation. The investigation not only attempts to determine the discrimination ability of the fuzziness measures for classifying scenes, but also enhances the capability of nonlinear, frame-accurate access to video data for applications such as video editing and visual document archival/retrieval systems in multimedia environments. (C) 1995 John Wiley and Sons, Inc. RP PAL, SK (reprint author), NASA,LYNDON B JOHNSON SPACE CTR,SOFTWARE TECHNOL BRANCH PT4,HOUSTON,TX 77058, USA. NR 13 TC 7 Z9 7 U1 0 U2 0 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 1064-1246 J9 J INTELL FUZZY SYST JI J. Intell. Fuzzy Syst. PY 1995 VL 3 IS 3 BP 247 EP 256 PG 10 WC Computer Science, Artificial Intelligence SC Computer Science GA RX312 UT WOS:A1995RX31200006 ER PT J AU GALBRAITH, L GREENE, TJ AF GALBRAITH, L GREENE, TJ TI MANUFACTURING SYSTEM PERFORMANCE SENSITIVITY TO SELECTION OF PRODUCT DESIGN METRICS SO JOURNAL OF MANUFACTURING SYSTEMS LA English DT Article DE PRODUCTION SYSTEM DESIGN; PRODUCTION LINE; ASSEMBLY LINE; PERFORMANCE MEASURES; PRODUCT DESIGN AB How and to what level the choice of design metrics influences manufacturing system performance measures is examined for three different types of manufacturing systems. The manufacturing systems were modeled using digital simulation for an electronics assembly case study. The design metrics examined were: (1) part density, (2) part variety, and (3) level of automation. System performance was evaluated using: (1) percentage of time for value-adding process functions, (2) production rate, and (3) nonconformance ratio. Regression modeling suggested that design metrics which affect quality influenced system performance measures the most. The design metric having the highest impact was the level of automation. RP GALBRAITH, L (reprint author), JET PROP LAB,QUAL ASSURANCE OFF,PASADENA,CA, USA. NR 0 TC 3 Z9 3 U1 0 U2 2 PU SOC MANUFACTURING ENGINEERS PI DEARBORN PA ONE SME DRIVE, PO BOX 930, DEARBORN, MI 48121-0930 SN 0278-6125 J9 J MANUF SYST JI J. Manuf. Syst. PY 1995 VL 14 IS 2 BP 71 EP 79 DI 10.1016/0278-6125(95)98888-D PG 9 WC Engineering, Industrial; Engineering, Manufacturing; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA RB476 UT WOS:A1995RB47600001 ER PT J AU RIENECKER, MM ADAMEC, D AF RIENECKER, MM ADAMEC, D TI ASSIMILATION OF ALTIMETER DATA INTO A QUASI-GEOSTROPHIC OCEAN MODEL USING OPTIMAL INTERPOLATION AND EOFS SO JOURNAL OF MARINE SYSTEMS LA English DT Article AB An ensemble of fraternal-twin experiments is used to assess the utility of optimal interpolation and model-based vertical empirical orthogonal functions (eofs) of streamfunction variability to assimilate satellite altimeter data into ocean models. Simulated altimeter data are assimilated into a basin-wide 3-layer quasi-geostrophic model with a horizontal grid spacing of 15 km. The effects of bottom topography are included and the model is forced by a wind stress curl distribution which is constant in time. The simulated data are extracted, along altimeter tracks with spatial and temporal characteristics of Geosat, from a reference model ocean with a slightly different climatology from that generated by the model used for assimilation. The use of vertical eofs determined from the model-generated streamfunction variability is shown to be effective in aiding the model's dynamical extrapolation of the surface information throughout the rest of the water column. After a single repeat cycle (17 days), the analysis errors are reduced markedly from the initial level, by 52% in the surface layer, 41% in the second layer and 11% in the bottom layer. The largest differences between the assimilation analysis and the reference ocean are found in the nonlinear regime of the mid-latitude jet in all layers. After 100 days of assimilation, the error in the upper two layers has been reduced by over 50% and that in the bottom layer by 38%. The essence of the method is that the eofs capture the statistics of the dynamical balances in the model and ensure that this balance is not inappropriately disturbed during the assimilation process. This statistical balance includes any potential vorticity homogeneity which may be associated with the eddy stirring by mid-latitude surface jets. RP RIENECKER, MM (reprint author), NASA,GODDARD SPACE FLIGHT CTR,HYDROSPHER PROC LAB,CODE 971,GREENBELT,MD 20771, USA. NR 0 TC 9 Z9 9 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0924-7963 J9 J MARINE SYST JI J. Mar. Syst. PD JAN PY 1995 VL 6 IS 1-2 BP 125 EP 143 DI 10.1016/0924-7963(94)00013-2 PG 19 WC Geosciences, Multidisciplinary; Marine & Freshwater Biology; Oceanography SC Geology; Marine & Freshwater Biology; Oceanography GA QA865 UT WOS:A1995QA86500011 ER PT J AU RAO, SM HE, KX LAL, RB EVANS, RA LOO, BH CHANG, JM METZGER, RM LEE, WJ SHIELDS, AS PENN, BG FRAZIER, DO AF RAO, SM HE, KX LAL, RB EVANS, RA LOO, BH CHANG, JM METZGER, RM LEE, WJ SHIELDS, AS PENN, BG FRAZIER, DO TI CRYSTAL-GROWTH AND INVESTIGATION OF EFFICIENT NONLINEAR-OPTICAL MATERIALS IN THE MIXED (2,-4-DINITROPHENYL)-L-ALANINE (DPA) AND 2-METHYL-4-NITROANILINE (MNA) SYSTEM SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID ORGANIC-CRYSTAL; METHYL-(2,4-DINITROPHENYL)-AMINOPROPANOATE; POLYMORPHISM; GENERATION AB When a 1.1 weight mixture of (2,-4-dinitrophenyl)-L-alanine (DPA) and 2-methyl-4-nitroaniline (MNA) is dissolved in a 50:50 volume mixture of ethyl acetate and hexane, two types of crystals were observed on slow evaporation. In the first stage of crystallization, light-yellow plates of MNA measuring up to 25 mm x 5 mm x 1 mm were formed, which belong to the triclinic space group P1 with lattice parameters a = 0.762 1 (3) nm, b = 0.795 2(5) nm, c = 0.820 0(2) nm, alpha = 111.84(2)degrees, beta = 93.76(2)degrees, gamma = 116.84(3)degrees, Z = 2. The volume of the unit cell containing two molecules is 361.9(1) x 10(-3) nm(3). The powder SHG efficiency of the triclinic polymorph (MNA(T)) is about the same as that of the monoclinic MNA(M). The Raman spectrum of the new crystal is similar to that of MNA(M) crystallized from the vapour phase or solution, except for the change in the intensity of a few bands. The DSC data. show minor differences in the melting points and specific heats for the two phases. The second stage of crystallization resulted in the formation of orange-yellow coloured crystals of the DPA: MNA complex, in the monoclinic space group P2(1) with lattice parameters a = 0.687 6(1) nm, b = 0.762 1 (3) nm, c = 1.762 6(4) nm, beta = 96.62(2)degrees, V = 917.5 x 10(-3) nm(3), Z = 2 for C16H17N5O(8). The Raman spectrum of DPA:MNA consists of bands from both DPA and MNA. The complex melts at 138(1)degrees C with a specific heat of 25.3(4) cal g(-1) according to the DSC measurements. The powder SHG efficiency is nearly the same as that of methyl-(2,4-dinitriphenyl)-aminoproanoate (MAP). C1 ALABAMA A&M UNIV,DEPT CHEM,NORMAL,AL 35762. UNIV ALABAMA,DEPT CHEM,HUNTSVILLE,AL 35899. UNIV ALABAMA,DEPT CHEM,TUSCALOOSA,AL 35472. NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,SPACE SCI LAB,HUNTSVILLE,AL 35812. RP RAO, SM (reprint author), ALABAMA A&M UNIV,DEPT PHYS,NORMAL,AL 35762, USA. NR 17 TC 1 Z9 1 U1 1 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 JAN 1 PY 1995 VL 30 IS 1 BP 179 EP 184 DI 10.1007/BF00352148 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA QB225 UT WOS:A1995QB22500023 ER PT J AU FERRANDO, AA WILLIAMS, BD STUART, CA LANE, HW WOLFE, RR AF FERRANDO, AA WILLIAMS, BD STUART, CA LANE, HW WOLFE, RR TI ORAL BRANCHED-CHAIN AMINO-ACIDS DECREASE WHOLE-BODY PROTEOLYSIS SO JOURNAL OF PARENTERAL AND ENTERAL NUTRITION LA English DT Article ID MUSCLE PROTEIN-SYNTHESIS; LEG TISSUES; INFUSION; METABOLISM; KINETICS; INSULIN; INVIVO; HYPERINSULINEMIA; STARVATION; TURNOVER AB Background: This Study reports the effects of ingesting branched-chain amino acids (leucine, valine, and isoleucine) on protein metabolism in four men. Methods: To calculate leg protein synthesis and breakdown we used a new model that utilized the infusion of L-[ring-C-13(6)]phenylalanine and the sampling of the leg arterial-venous difference and muscle biopsies. In addition, protein-bound enrichments provided for the direct calculation of muscle fractional synthetic rate. Four control subjects ingested an equivalent amount of essential amino acids (threonine, methionine, and histidine) to discern the effects of branched-chain amino acid nitrogen vs the effects of essential amino acid nitrogen. Each drink also included 50 g of carbohydrate. Results: Consumption of the branched-chain and the essential amino acid solutions produced significant threefold and fourfold elevations in their respective arterial concentrations. Protein synthesis and breakdown were unaffected by branched-chain amino acids, but they increased by 43% (p <.05) and 36% (p < .03), respectively, in the group consuming the essential amino acids. However, net leg balance of phenylalanine was unchanged by either drink. Direct measurement of protein synthesis by tracer incorporation into muscle protein (fractional synthetic rate) revealed no changes within or between drinks. Whole-body phenylalanine flux was significantly suppressed by each solution but to a greater extent by the branched-chain amino acids (15% and 20%, respectively) (p < .001). Conclusions: These results suggest that branched-chain amino acid ingestion suppresses whole-body proteolysis in tissues other than skeletal muscle in normal men. C1 NASA,LYNDON B JOHNSON SPACE CTR,BIOMED OPERAT & RES BRANCH,HOUSTON,TX 77058. GEN CLIN RES CTR,GALVESTON,TX. RP FERRANDO, AA (reprint author), SHRINERS BURN INST,METAB UNIT,815 MARKET ST,GALVESTON,TX 77550, USA. FU NCRR NIH HHS [M01-RR00073] NR 26 TC 34 Z9 37 U1 0 U2 3 PU AMER SOC PARENTERAL & ENTERAL NUTRITION PI SILVER SPRING PA 8630 FENTON STREET SUITE 412, SILVER SPRING, MD 20910 SN 0148-6071 J9 JPEN-PARENTER ENTER JI J. Parenter. Enter. Nutr. PD JAN-FEB PY 1995 VL 19 IS 1 BP 47 EP 54 DI 10.1177/014860719501900147 PG 8 WC Nutrition & Dietetics SC Nutrition & Dietetics GA QA886 UT WOS:A1995QA88600009 PM 7658600 ER PT J AU CHUNG, CH KIM, SC STUBBS, RM DEWITT, KJ AF CHUNG, CH KIM, SC STUBBS, RM DEWITT, KJ TI LOW-DENSITY NOZZLE-FLOW BY THE DIRECT SIMULATION MONTE-CARLO AND CONTINUUM METHODS SO JOURNAL OF PROPULSION AND POWER LA English DT Article ID NITROGEN AB Two different approaches, the direct simulation Monte Carlo (DSMC) method based on molecular gasdynamics, and a finite-volume approximation of the Navier-Stokes equations, which are based on continuum gasdynamics, are employed in the analysis of a low-density gas flow in a small converging-diverging nozzle. The fluid experiences various kinds of flow regimes including continuum, slip, transition, and free-molecular. Results from the two numerical methods are compared with Rothe's experimental data, in which density and rotational temperature variations along the centerline and at various locations inside a low-density nozzle were measured by the electron-beam fluorescence technique. The continuum approach showed good agreement with the experimental data as far as density is concerned. The results from the DSMC method showed good agreement with the experimental data, both in the density and the rotational temperature. It is also shown that the simulation parameters, such as the gas/surface interaction model, the energy exchange model between rotational and translational modes, and the viscosity-temperature exponent, have substantial effects on the results of the DSMC method. C1 NASA,LEWIS RES CTR GRP,MYMA INC,CLEVELAND,OH 44135. UNIV TOLEDO,DEPT CHEM ENGN,TOLEDO,OH 43606. RP CHUNG, CH (reprint author), NASA,LEWIS RES CTR,COMPUTAT METHODS SPACE BRANCH,CLEVELAND,OH 44135, USA. NR 42 TC 18 Z9 19 U1 0 U2 3 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD JAN-FEB PY 1995 VL 11 IS 1 BP 64 EP 70 DI 10.2514/3.23841 PG 7 WC Engineering, Aerospace SC Engineering GA QC553 UT WOS:A1995QC55300008 ER PT J AU CHUNG, CH DEWITT, KJ JENG, DR KEITH, TG AF CHUNG, CH DEWITT, KJ JENG, DR KEITH, TG TI NUMERICAL-ANALYSIS OF RAREFIED-GAS FLOW-THROUGH 2-DIMENSIONAL NOZZLES SO JOURNAL OF PROPULSION AND POWER LA English DT Article AB A kinetic-theory analysis is made of the now of a rarefied gas from one reservoir to another through two-dimensional nozzles with arbitrary contour. The Boltzmann equation, simplified by the Bhatnagar, Gross, and Krook model for the collision integral, is solved by means of finite difference approximations with the discrete ordinate method. The physical spate is transformed by a general grid-generation technique, and the velocity space is transformed to a polar coordinate system. A numerical code is developed that can be applied to any two-dimensional passage of complicated geometry for the flow regimes from free-molecular to slip. Numerical values of flow quantities can be calculated for the entire physical space, including both inside the nozzle and in the outside plume. Predictions are made for the case of parallel slots and compared with existing literature data. Also, results for the cases of convergent or divergent slots and two-dimensional nozzles with arbitrary contour at arbitrary Knudsen number are presented. C1 UNIV TOLEDO,DEPT CHEM ENGN,TOLEDO,OH 43606. UNIV TOLEDO,DEPT MECH ENGN,TOLEDO,OH 43606. RP CHUNG, CH (reprint author), NASA,LEWIS RES CTR,COMPUTAT METHODS SPACE BRANCH,CLEVELAND,OH 44133, USA. NR 37 TC 2 Z9 2 U1 1 U2 4 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD JAN-FEB PY 1995 VL 11 IS 1 BP 71 EP 78 DI 10.2514/3.23842 PG 8 WC Engineering, Aerospace SC Engineering GA QC553 UT WOS:A1995QC55300009 ER PT J AU LAROSILIERE, LM AF LAROSILIERE, LM TI WAVE ROTOR CHARGING PROCESS - EFFECTS OF GRADUAL OPENING AND ROTATION SO JOURNAL OF PROPULSION AND POWER LA English DT Article AB The wave rotor charging process under conditions of gradual opening accompanied by passage rotation is numerically simulated. Insights into the response of the interface and kinematics of the flowfield to various opening times are given. Since the opening time is inversely proportional to the rotational speed of the rotor, effects of passage rotation such as centripetal and Coriolis accelerations are intrinsically coupled to the gradual opening process. Certain three-dimensional features associated with the charging process as a result of centripetal and Coriolis accelerations are illustrated. It is shown that the interface between driver and driven gas acquires a three-dimensional distortion depending on the rotational speed and opening time. RP LAROSILIERE, LM (reprint author), OHIO AEROSP INST,NASA,LEWIS RES CTR,CLEVELAND,OH 44135, USA. NR 6 TC 11 Z9 11 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD JAN-FEB PY 1995 VL 11 IS 1 BP 178 EP 184 DI 10.2514/3.23856 PG 7 WC Engineering, Aerospace SC Engineering GA QC553 UT WOS:A1995QC55300023 ER PT J AU BARKSTROM, BR AF BARKSTROM, BR TI AN EFFICIENT ALGORITHM FOR CHOOSING SCATTERING DIRECTIONS IN MONTE-CARLO WORK WITH ARBITRARY PHASE FUNCTIONS SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article AB This paper describes an efficient Monte Carlo algorithm for choosing a new direction of a photon after a scattering interaction. The algorithm chooses a scattering angle by linear interpolation in a table of the inverse cumulative scattering probability. A Legendre expansion of the phase function makes it easy to apply Clenshaw's algorithm to build the interpolation table. The points in the table are close enough together that linear interpolation is accurate. With a table of 100,000 entries, we can keep the absolute and relative errors in matching the probability distribution below 10(-5). RP BARKSTROM, BR (reprint author), NASA,LANGLEY RES CTR,DIV ATMOSPHER SCI,HAMPTON,VA 23681, USA. NR 18 TC 8 Z9 9 U1 3 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JAN PY 1995 VL 53 IS 1 BP 23 EP 38 DI 10.1016/0022-4073(94)00104-F PG 16 WC Optics; Spectroscopy SC Optics; Spectroscopy GA QK347 UT WOS:A1995QK34700002 ER PT J AU BEER, R AF BEER, R TI 5TH WORKSHOP ON ATMOSPHERIC SCIENCE FROM SPACE USING FOURIER-TRANSFORM SPECTROSCOPY - TOKYO, JAPAN - 30-NOVEMBER-1994 2-DECEMBER-1994 SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Editorial Material RP BEER, R (reprint author), CALTECH,JET PROP LAB,DIV EARTH & SPACE SCI,PASADENA,CA 91125, USA. NR 0 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 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JAN PY 1995 VL 53 IS 1 BP R1 EP R2 PG 2 WC Optics; Spectroscopy SC Optics; Spectroscopy GA QK347 UT WOS:A1995QK34700009 ER PT J AU MINNETYAN, L RIVERS, JM CHAMIS, CC MURTHY, PLN AF MINNETYAN, L RIVERS, JM CHAMIS, CC MURTHY, PLN TI DISCONTINUOUSLY STIFFENED COMPOSITE PANEL UNDER COMPRESSIVE LOADING SO JOURNAL OF REINFORCED PLASTICS AND COMPOSITES LA English DT Article DE COMPOSITE MATERIALS; COMPOSITES; COMPUTATIONAL SIMULATION; DAMAGE; DEGRADATION; DURABILITY; FRACTURE; LAMINATES; SIMULATION; STIFFENED PANEL; STRUCTURAL DEGRADATION ID PROGRESSIVE FRACTURE AB The design of composite structures requires an evaluation of their safety and durability under service loads and possible overload conditions. This paper presents a computational tool that has been developed to examine the response of stiffened composite panels via the simulation of damage initiation, growth, accumulation, progression, and propagation to structural fracture or collapse. The structural durability of a composite panel with a discontinuous stiffener is investigated under compressive loading induced by the gradual displacement of an end support. Results indicate damage initiation and progression to have significant effects on structural behavior under loading. Utilization of an integrated computer code for structural durability assessment is demonstrated. C1 NASA,LEWIS RES CTR,DIV STRUCT,CLEVELAND,OH 44135. RP MINNETYAN, L (reprint author), CLARKSON UNIV,DEPT CIVIL & ENVIRONM ENGN,POTSDAM,NY 13699, USA. NR 14 TC 11 Z9 11 U1 0 U2 3 PU TECHNOMIC PUBL CO INC PI LANCASTER PA 851 NEW HOLLAND AVE, BOX 3535, LANCASTER, PA 17604 SN 0731-6844 J9 J REINF PLAST COMP JI J. Reinf. Plast. Compos. PD JAN PY 1995 VL 14 IS 1 BP 85 EP 98 PG 14 WC Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA QE333 UT WOS:A1995QE33300006 ER PT J AU SERAJI, HY AF SERAJI, HY TI REACHABILITY ANALYSIS FOR BASE PLACEMENT IN MOBILE MANIPULATORS SO JOURNAL OF ROBOTIC SYSTEMS LA English DT Article AB This article addresses the problem of base placement for mobile robots using a reachability analysis. A simple geometric solution is proposed to determine the appropriate base locations from which the robot can reach a stationary or moving target point. This leads to a simple criterion for automated base placement, thus relieving the operator from the tedious and repetitive procedure for continuously positioning the robot base manually during the execution of the end-effector task. For robots with one degree-of-mobility such as tracked robots, the feasible base locations consists of a region on the translational axis, the boundaries of which are derived in this article. The results are used to obtain the base locations so that the robot can reach a vertical line, a square surface, and a cubic volume. Using the proposed method, two experimental studies at the JPL Surface Inspection Laboratory are described: scanning a surface and reaching inside an opening. The results of the article are extended to mobile robots with two and three degrees-of-mobility such as rover-mounted arms and gantry robots, and a simple numerical example is given for illustration. (C) 1995 John Wiley & Sons, Inc. RP CALTECH, JET PROP LAB, 4800 OAK GROVE DR, PASADENA, CA 91109 USA. NR 8 TC 13 Z9 14 U1 0 U2 2 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0741-2223 J9 J ROBOTIC SYST JI J. Robot. Syst. PD JAN PY 1995 VL 12 IS 1 BP 29 EP 43 DI 10.1002/rob.4620120104 PG 15 WC Robotics SC Robotics GA QK152 UT WOS:A1995QK15200003 ER PT J AU CHUNG, CH KIM, SC DEWITT, KJ NAGAMATSU, HT AF CHUNG, CH KIM, SC DEWITT, KJ NAGAMATSU, HT TI NUMERICAL-ANALYSIS OF HYPERSONIC LOW-DENSITY SCRAMJET INLET FLOW SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Article ID MONTE-CARLO SIMULATION; GAS AB Hypersonic low-density flow around a two-dimensional scramjet inlet model has been analyzed using the direct simulation Monte Carlo (DSMC) method. The predominant features of hypersonic flows, such as a thick viscous layer due to the low-density fluid together with shock-boundary-layer interaction and shock impingement as well as shock-induced separation, are encountered in this type of flowfield. Three hypersonic flowfields with different degrees of rarefaction are investigated. The freestream Knudsen numbers of the flowfields based on the height of the duct passage are in the range of 0.02-0.12, Conventional continuum gasdynamics based on the concept of a local equilibrium may not be adequate to describe this type of flowfield accurately. The pressures obtained by the DSMC simulation are compared with available experimental data. Good agreement is obtained with previous experimental data and with theoretical solutions for similar wedge flow cases near the leading edge of the ramp centerbody. Good agreement is observed with the experimental data of Minucci and Nagamatsu except for some discrepancies, especially in the lower-density cases, which may be partially attributed to three-dimensional effects and/or to experimental uncertainty. C1 UNIV TOLEDO,DEPT CHEM ENGN,TOLEDO,OH 43606. RENSSELAER POLYTECH INST,DEPT AERONAUT ENGN,TROY,NY 12180. RP CHUNG, CH (reprint author), NASA,LEWIS RES CTR,CLEVELAND,OH 44135, USA. NR 22 TC 9 Z9 9 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD JAN-FEB PY 1995 VL 32 IS 1 BP 60 EP 66 DI 10.2514/3.26575 PG 7 WC Engineering, Aerospace SC Engineering GA QL257 UT WOS:A1995QL25700007 ER PT J AU TARTABINI, PV WILMOTH, RG RAULT, DFG AF TARTABINI, PV WILMOTH, RG RAULT, DFG TI DIRECT SIMULATION MONTE-CARLO CALCULATION OF A JET INTERACTION EXPERIMENT SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Article AB This study deals with the development of a methodology for numerically simulating the interaction of a reaction control system (RCS) jet with a low-density external now, A European Space Agency experiment was chosen as a test case, since it provided experimental data that could validate some of the numerical results, The initial approach was to focus on several subproblems having direct relevance to the full interaction problem, This enabled different numerical methods to be investigated separately and validated for each part of the interaction problem, In this manner, the best methodology for solving the full interaction problem was developed, The subproblems considered in this study included typical RCS nozzle and plume flows, a flat plate at zero incidence, and the how past the experimental test model without the control jet firing, Once these calculations were completed, a simulation was performed of the test model with the control jet operating at the experimental density, The results from this final simulation were compared with experimental measurements, RP TARTABINI, PV (reprint author), NASA,LANGLEY RES CTR,DIV SPACE SYST,AEROTHERMODYNAM BRANCH,HAMPTON,VA 23681, USA. NR 18 TC 6 Z9 7 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD JAN-FEB PY 1995 VL 32 IS 1 BP 75 EP 83 DI 10.2514/3.26577 PG 9 WC Engineering, Aerospace SC Engineering GA QL257 UT WOS:A1995QL25700009 ER PT J AU CLARK, RK CUNNINGTON, GR WIEDEMANN, KE AF CLARK, RK CUNNINGTON, GR WIEDEMANN, KE TI DETERMINATION OF THE RECOMBINATION EFFICIENCY OF THERMAL CONTROL COATINGS FOR HYPERSONIC VEHICLES SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Article AB A method is presented for determining the recombination efficiency of coatings for hypersonic vehicle applications, The approach uses experimental results from arc-jet tests with an analysis to determine the efficiency for the recombination of atomic species present in the boundary layer, The analysis employs analytical solutions to the laminar boundary-layer heat-transfer equations with experimental heating-rate, temperature, and pressure measurements. The authors discuss experimental difficulties in achieving reliable materials-performance data. The utility of the method is that it provides a rapid and efficient tool for use in qualitative screening and development of materials. The effects of second-order heat-transfer terms may be as high as 50% for low-catalysis surfaces. With the second-order terms included, the maximum uncertainty in recombination-efficiency data for low-catalysis surfaces is 45 %. The discussions are based on experimental data and calculations for arc-jet tests of the titanium alloy Ti-14Al-21Nb with a borosilicate-like glass coating that has a recombination efficiency of about 0.006 to 0.01. C1 CUNNINGTON ASSOCIATES,PALO ALTO,CA 94306. ANALYT SERV & MAT INC,HAMPTON,VA 23665. RP CLARK, RK (reprint author), NASA,LANGLEY RES CTR,HAMPTON,VA 23681, USA. NR 20 TC 9 Z9 9 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD JAN-FEB PY 1995 VL 32 IS 1 BP 89 EP 96 DI 10.2514/3.26579 PG 8 WC Engineering, Aerospace SC Engineering GA QL257 UT WOS:A1995QL25700011 ER PT J AU DEGROH, KK MCCOLLUM, TA AF DEGROH, KK MCCOLLUM, TA TI LOW-EARTH-ORBIT DURABILITY OF PROTECTED SILICONE FOR REFRACTIVE PHOTOVOLTAIC CONCENTRATOR ARRAYS SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Article AB Photovoltaic power systems with novel refractive silicone solar concentrators are being developed for use in low Earth orbit (LEG). Because of the vulnerability of silicones to atomic oxygen and ultraviolet radiation, these lenses are coated with a multilayer metal oxide protective coating, The objective of this work was to evaluate the effects of atomic oxygen and thermal exposures on multilayer coated silicone. Samples were exposed to high-influence ground-laboratory and low-fluence in-space atomic oxygen. Ground testing resulted in decreases in both total and specular transmittance, while in-space exposure resulted in only small decreases in specular transmittance, A contamination film, attributed to exposed silicone at coating crack sites, was found to cause transmittance decreases during ground testing. Propagation of coating cracks was found to be the result of sample heating during exposure. The potential for silicone exposure, with the resulting degradation of optical properties from silicone contamination, indicates that this multilayer coated silicone is not durable for LEO space applications where thermal exposures will cause coating crack development and propagation. C1 CLEVELAND STATE UNIV,DEPT PHYS,CLEVELAND,OH 44115. RP DEGROH, KK (reprint author), NASA,LEWIS RES CTR,ELECTROPHYS BRANCH,DIV POWER TECHNOL,MS 3092,21000 BROOKPK RD,CLEVELAND,OH 44135, USA. NR 9 TC 5 Z9 5 U1 1 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD JAN-FEB PY 1995 VL 32 IS 1 BP 103 EP 109 DI 10.2514/3.26581 PG 7 WC Engineering, Aerospace SC Engineering GA QL257 UT WOS:A1995QL25700013 ER PT J AU MAVRIPLIS, DJ DAS, R SALTZ, J VERMELAND, RE AF MAVRIPLIS, DJ DAS, R SALTZ, J VERMELAND, RE TI IMPLEMENTATION OF A PARALLEL UNSTRUCTURED EULER SOLVER ON SHARED-MEMORY AND DISTRIBUTED-MEMORY ARCHITECTURES SO JOURNAL OF SUPERCOMPUTING LA English DT Article DE UNSTRUCTURED EULER SOLVER; FLUID DYNAMICS; SUPERCOMPUTERS; SHARED MEMORY; DISTRIBUTED MEMORY AB An efficient three-dimensional unstructured Euler solver is parallelized on a CRAY Y-MP C90 shared-memory computer and on an Intel Touchstone Delta distributed-memory computer. This paper relates the experiences gained and describes the software tools and hardware used in this study. Performance comparisons between the two differing architectures are made. C1 UNIV MARYLAND,DEPT COMP SCI,COLLEGE PK,MD 20742. CRAY RES INC,EAGAN,MN 55121. RP MAVRIPLIS, DJ (reprint author), NASA,LANGLEY RES CTR,INST COMP APPL SCI & ENGN,HAMPTON,VA 23665, USA. NR 19 TC 6 Z9 6 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0920-8542 J9 J SUPERCOMPUT JI J. Supercomput. PY 1995 VL 8 IS 4 BP 329 EP 344 DI 10.1007/BF01901613 PG 16 WC Computer Science, Hardware & Architecture; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA QQ615 UT WOS:A1995QQ61500003 ER PT J AU MADARAS, EI KOHL, TW ROGERS, WP AF MADARAS, EI KOHL, TW ROGERS, WP TI MEASUREMENT AND MODELING OF DISPERSIVE PULSE-PROPAGATION IN DRAWN WIRE WAVE-GUIDES SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID MEDICAL ULTRASONICS; WAVE-GUIDES; CYLINDERS; PHASE C1 UNIV COLORADO,DEPT MECH ENGN,BOULDER,CO 80309. RP MADARAS, EI (reprint author), NASA,LANGLEY RES CTR,HAMPTON,VA 23681, USA. NR 28 TC 8 Z9 8 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 JAN PY 1995 VL 97 IS 1 BP 252 EP 261 DI 10.1121/1.412308 PG 10 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA QC161 UT WOS:A1995QC16100029 ER PT J AU BASS, HE SUTHERLAND, LC ZUCKERWAR, AJ BLACKSTOCK, DT HESTER, DM AF BASS, HE SUTHERLAND, LC ZUCKERWAR, AJ BLACKSTOCK, DT HESTER, DM TI ATMOSPHERIC ABSORPTION OF SOUND - FURTHER DEVELOPMENTS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Letter C1 NASA,LANGLEY RES CTR,HAMPTON,VA 23665. UNIV TEXAS,APPL RES LABS,AUSTIN,TX 78713. UNIV TEXAS,DEPT MECH ENGN,AUSTIN,TX 78713. RP BASS, HE (reprint author), UNIV MISSISSIPPI,PHYS ACOUST RES GRP,UNIVERSITY,MS 38677, USA. NR 3 TC 143 Z9 146 U1 6 U2 20 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 JAN PY 1995 VL 97 IS 1 BP 680 EP 683 DI 10.1121/1.412989 PG 4 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA QC161 UT WOS:A1995QC16100070 ER PT J AU FLETCHER, JW AF FLETCHER, JW TI IDENTIFICATION OF UH-60 STABILITY DERIVATIVE MODELS IN HOVER FROM FLIGHT TEST DATA SO JOURNAL OF THE AMERICAN HELICOPTER SOCIETY LA English DT Article ID SYSTEM-IDENTIFICATION; ROTORCRAFT AB A fourteen degree of freedom model which characterizes the open loop UH-60 flight dynamics in hover is identified from flight test data using a frequency-response-error identification method. The model in eludes rigid body fuselage dynamics, regressing rotor flap and lead-lag dynamics, main rotor inflow, rotor RPM, and engine/governor dynamics and is applicable in the frequency range of 0.1 to 20 rad/sec. The stability and control derivative model is iteratively fit to a set of flight identified frequency responses. Parameters are iteratively eliminated from the model structure based on robust metrics of parameter insensitivity and correlation. The final minimally parameterized model is driven with dissimilar flight test measured inputs and the outputs are compared to the flight measured responses to verify that the model adequately characterizes the aircraft dynamic response to pilot inputs in the frequency range of interest and has good predictive capabilities. When the model parameters are compared with theoretical results, the identified flapping dynamics are in accord with theory except for the coupling terms. When the time and frequency responses of the model are compared to those of two blade element simulation models of the UH-60, the identified model predicts the on-axis response of the helicopter as well as the other models and has superior off-axis fidelity. RP FLETCHER, JW (reprint author), NASA,AMES RES CTR,ATCOM,US ARMY AEROFLIGHTDYNAM DIRECTORATE,MOFFETT FIELD,CA 94035, USA. NR 25 TC 11 Z9 12 U1 0 U2 0 PU AMER HELICOPTER SOC INC PI ALEXANDRIA PA 217 N WASHINGTON ST, ALEXANDRIA, VA 22314 SN 0002-8711 J9 J AM HELICOPTER SOC JI J. Am. Helicopter Soc. PD JAN PY 1995 VL 40 IS 1 BP 32 EP 46 PG 15 WC Engineering, Aerospace SC Engineering GA RP488 UT WOS:A1995RP48800003 ER PT J AU GAGE, PJ BRAUN, RD KROO, IM AF GAGE, PJ BRAUN, RD KROO, IM TI INTERPLANETARY TRAJECTORY OPTIMIZATION USING A GENETIC ALGORITHM SO JOURNAL OF THE ASTRONAUTICAL SCIENCES LA English DT Article ID ATMOSPHERIC ENTRY VELOCITY; MARS MISSIONS; SELECTION; OPTIONS AB Robust optimization of interplanetary trajectories is difficult because the domain is typically multimodal and discontinuous. Genetic algorithms are often successful in such domains. Therefore, a genetic algorithm has been linked to a patched-conic mission analysis code to assess its performance for interplanetary problems. It is compared with grid search techniques, which are commonly used in the initial exploration of interplanetary concepts. This new method out-performs grid search in all test problems considered to date. The genetic algorithm's performance superiority is shown to increase with the number of design variables. When a sharing function is included, the genetic algorithm is able to identify several local minima. Performance was influenced by the topology of the search space: large infeasible regions increased the difficulty of the problem. The genetic algorithm is able to explore different mission concepts simultaneously, allowing simpler problem formulation for the user. C1 NASA,LANGLEY RES CTR,HAMPTON,VA 23665. RP GAGE, PJ (reprint author), STANFORD UNIV,DEPT AERONAUT & ASTRONAUT,STANFORD,CA 94305, USA. NR 21 TC 32 Z9 32 U1 2 U2 2 PU AMER ASTRONAUTICAL SOC PI SPRINGFIELD PA 6352 ROLLING MILL PLACE SUITE 102, SPRINGFIELD, VA 22152 SN 0021-9142 J9 J ASTRONAUT SCI JI J. Astronaut. Sci. PD JAN-MAR PY 1995 VL 43 IS 1 BP 59 EP 75 PG 17 WC Engineering, Aerospace SC Engineering GA RP568 UT WOS:A1995RP56800004 ER PT J AU PERNICKA, HJ SCARBERRY, DP MARSH, SM SWEETSER, TH AF PERNICKA, HJ SCARBERRY, DP MARSH, SM SWEETSER, TH TI A SEARCH FOR LOW DELTA-V EARTH-TO-MOON TRAJECTORIES SO JOURNAL OF THE ASTRONAUTICAL SCIENCES LA English DT Article AB A search for low Delta V Earth-to-Moon trajectories has been initiated. Numerical integration of the equations of motion from the circular restricted three-body problem has resulted in the computation of a trajectory that saves more than 100 m/s over a Hohmann transfer, although the flight time is almost ten months. The approach used involves the computation of two trajectory ''legs'': first, a trajectory from low Earth orbit to the L(1) libration point of the Earth-Moon system, and second, a trajectory from L(1) to an orbit about the Moon. Multiple orbits about Earth using lunar perturbations facilitates the transfer to L(1). Similarly, the L(1) to Moon leg uses the perturbation from the Earth to achieve a low orbit about the Moon. Small maneuvers are used in both legs to control the orbital period so the third body perturbations can be used advantageously. C1 DESKIN RES GRP INC,SANTA CLARA,CA 95054. LOCKHEED MISSILES & SPACE CO,SUNNYVALE,CA 94088. CALTECH,JET PROP LAB,PASADENA,CA 91109. RP PERNICKA, HJ (reprint author), SAN JOSE STATE UNIV,DEPT AEROSP ENGN,1 WASHINGTON SQ,SAN JOSE,CA 95192, USA. NR 11 TC 10 Z9 10 U1 0 U2 0 PU AMER ASTRONAUTICAL SOC PI SPRINGFIELD PA 6352 ROLLING MILL PLACE SUITE 102, SPRINGFIELD, VA 22152 SN 0021-9142 J9 J ASTRONAUT SCI JI J. Astronaut. Sci. PD JAN-MAR PY 1995 VL 43 IS 1 BP 77 EP 88 PG 12 WC Engineering, Aerospace SC Engineering GA RP568 UT WOS:A1995RP56800005 ER PT J AU ROWLANDS, DD MCCARTHY, JJ TORRENCE, MH WILLIAMSON, RG AF ROWLANDS, DD MCCARTHY, JJ TORRENCE, MH WILLIAMSON, RG TI MULTIRATE NUMERICAL-INTEGRATION OF SATELLITE ORBITS FOR INCREASED COMPUTATIONAL-EFFICIENCY SO JOURNAL OF THE ASTRONAUTICAL SCIENCES LA English DT Note ID LAGEOS SATELLITE; DRAG AB A multi-rate numerical integration method is applied which allows the direct effect of particular force model components on a satellite's orbital state to be estimated separately from the effects of the remaining forces on the satellite. The method allows the quickly changing features of a particular force model component to be sampled without the cost of frequent evaluations of the entire force model. The extra equations which this method generates are coupled with the standard equations so that the indirect effects of the force model component are not lost. This approach is tested on a LAGEOS II orbit using solar radiation pressure which has quickly changing penumbral effects. C1 HUGHES STX,GREENBELT,MD. RP ROWLANDS, DD (reprint author), NASA,GODDARD SPACE FLIGHT CTR,SPACE GEODESY BRANCH,GREENBELT,MD 20771, USA. RI Rowlands, David/D-2751-2012 NR 12 TC 6 Z9 6 U1 0 U2 1 PU AMER ASTRONAUTICAL SOC PI SPRINGFIELD PA 6352 ROLLING MILL PLACE SUITE 102, SPRINGFIELD, VA 22152 SN 0021-9142 J9 J ASTRONAUT SCI JI J. Astronaut. Sci. PD JAN-MAR PY 1995 VL 43 IS 1 BP 89 EP 100 PG 12 WC Engineering, Aerospace SC Engineering GA RP568 UT WOS:A1995RP56800006 ER PT J AU SASSEN, K STARR, DOC MACE, GG POELLOT, MR MELFI, SH EBERHARD, WL SPINHIRNE, JD ELORANTA, EW HAGEN, DE HALLETT, J AF SASSEN, K STARR, DOC MACE, GG POELLOT, MR MELFI, SH EBERHARD, WL SPINHIRNE, JD ELORANTA, EW HAGEN, DE HALLETT, J TI THE 5-6 DECEMBER 1991 FIRE IFO-II JET-STREAM CIRRUS CASE-STUDY - POSSIBLE INFLUENCES OF VOLCANIC AEROSOLS SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID EL CHICHON; CLOUD MICROPHYSICS; POLARIZATION LIDAR; CYCLOGENESIS; CLIMATOLOGY; NUCLEATION; PARTICLES; CHEMISTRY; EVOLUTION; DROPLETS AB In presenting an overview of the cirrus clouds comprehensively studied by ground-based and airborne sensors from Coffeyville, Kansas, during the 5-6 December 1992 Project FIRE IFO II case study period, evidence is provided that volcanic aerosols from the June 1998 Pinatubo eruptions may have significantly influenced the formation and maintenance of the cirrus. Following the local appearance of a spur of stratospheric volcanic debris from the subtropics, a series of jet streaks subsequently conditioned the troposphere through tropopause foldings with sulfur-based particles that became effective cloud-forming nuclei in cirrus clouds. Aerosol and ozone measurements suggest a complicated history of stratospheric-tropospheric exchanges embedded within the upper-level flow, and cirrus cloud formation was noted to occur locally at the boundaries of stratospheric aerosol-enriched layers that became humidified through diffusion, precipitation, or advective processes. Apparent cirrus cloud alterations include abnormally high ice crystal concentrations (up to approximately 600 L-1), complex radial ice crystal types, and relatively large haze particles in cirrus uncinus cell heads at temperatures between -40-degrees and -50-degrees-C. Implications for volcanic-cirrus cloud climate effects and usual (nonvolcanic aerosol) jet stream cirrus cloud formation are discussed. C1 NOAA,ENVIRONM TECHNOL LAB,BOULDER,CO 80303. DESERT RES INST,RENO,NV. UNIV N DAKOTA,DEPT ATMOSPHER SCI,GRAND FORKS,ND 58201. PENN STATE UNIV,DEPT METEOROL,UNIVERSITY PK,PA 16802. NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. UNIV MISSOURI,DEPT PHYS,ROLLA,MO 65401. UNIV WISCONSIN,DEPT METEOROL,MADISON,WI 53706. RP SASSEN, K (reprint author), UNIV UTAH,DEPT METEOROL,819 WILLIAM C BROWNING BLDG,SALT LAKE CITY,UT 84112, USA. RI Eberhard, Wynn/B-5402-2015 NR 42 TC 69 Z9 70 U1 0 U2 4 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 JAN 1 PY 1995 VL 52 IS 1 BP 97 EP 123 DI 10.1175/1520-0469(1995)052<0097:TDFIIJ>2.0.CO;2 PG 27 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA QC353 UT WOS:A1995QC35300006 ER PT J AU BARNES, NP WILLIAMSBYRD, JA AF BARNES, NP WILLIAMSBYRD, JA TI AVERAGE POWER EFFECTS IN PARAMETRIC OSCILLATORS AND AMPLIFIERS SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID ND-YAG LASER; OPTICAL-PROPERTIES AB Thermally induced phase mismatch and thermally induced lensing will limit the average power available from a parametric oscillator or amplifier. Expressions are derived that describe both of these average power effects for the commonly used radial heat extraction as well as for longitudinal heat extraction. It is shown that the effects of thermally induced phase mismatch can be mitigated by a judicious selection of the phase-matching conditions. RP BARNES, NP (reprint author), NASA,LANGLEY RES CTR,HAMPTON,VA 23681, USA. NR 30 TC 16 Z9 17 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD JAN PY 1995 VL 12 IS 1 BP 124 EP 131 DI 10.1364/JOSAB.12.000124 PG 8 WC Optics SC Optics GA QA894 UT WOS:A1995QA89400016 ER PT J AU LAUNIS, RD AF LAUNIS, RD TI FAITHFUL HISTORY - ESSSAYS ON WRITING MORMON HISTORY - SMITH,GD SO JOURNAL OF THE WEST LA English DT Book Review RP LAUNIS, RD (reprint author), NASA,WASHINGTON,DC 20546, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU J WEST INC PI MANHATTAN PA P O BOX 1009 1531 YUMA, MANHATTAN, KS 66502 SN 0022-5169 J9 J WEST JI J. West PD JAN PY 1995 VL 34 IS 1 BP 101 EP 101 PG 1 WC History SC History GA QD427 UT WOS:A1995QD42700050 ER PT J AU PARK, C LEE, SH AF PARK, C LEE, SH TI VALIDATION OF MULTITEMPERATURE NOZZLE-FLOW CODE SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER LA English DT Article AB A computer code nozzle in n-temperatures (NOZNT), which calculates one-dimensional flows of partially dissociated and ionized air in an expanding nozzle, is tested against three existing sets of experimental data taken in arcjet wind tunnels. The code accounts for the differences among various temperatures, i.e., translational-rotational temperature, vibrational temperatures of individual molecular species, and electron-electronic temperature, and the effects of impurities. The experimental data considered are 1) the spectroscopic emission data, 2) electron beam data on vibrational temperature, and 3) mass-spectrometric species concentration data. It is shown that the impurities are inconsequential for the arcjet flows, and the NOZNT code is validated by numerically reproducing the experimental data. C1 ELORET INST,PALO ALTO,CA 94303. RP PARK, C (reprint author), NASA,AMES RES CTR,MOFFETT FIELD,CA 94035, USA. NR 43 TC 33 Z9 33 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0887-8722 J9 J THERMOPHYS HEAT TR JI J. Thermophys. Heat Transf. PD JAN-MAR PY 1995 VL 9 IS 1 BP 9 EP 16 DI 10.2514/3.622 PG 8 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA QB291 UT WOS:A1995QB29100002 ER PT J AU PARK, C AF PARK, C TI ESTIMATION OF EXCITATION-ENERGY OF DIATOMIC-MOLECULES IN EXPANDING NONEQUILIBRIUM FLOWS SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER LA English DT Article AB The energy contained in the highly excited vibrational and rotational states in a diatomic gas in a thermochemical nonequilibrium state during expansion is estimated. The population distribution of the vibrational and rotational states is assumed to be describable by a polynomial. The parameters in the polynomial are determined by invoking known physical constraints. The energy contained in the internal states in excess of that accounted for in the conventional method is calculated for N-2, O-2, NO, CO, and H-2. The calculation is carried over a wide range of conditions, and the results are fitted with polynomials. The population distributions so determined agree with the theoretical and experimental results of others. A sample calculation made for a typical nozzle now shows that the excess energy may reach 6% of the total enthalpy of the flow, and that the flow velocity may decrease by 3% due to this phenomenon. RP PARK, C (reprint author), NASA,AMES RES CTR,MOFFETT FIELD,CA 94035, USA. NR 27 TC 5 Z9 5 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0887-8722 J9 J THERMOPHYS HEAT TR JI J. Thermophys. Heat Transf. PD JAN-MAR PY 1995 VL 9 IS 1 BP 17 EP 25 DI 10.2514/3.623 PG 9 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA QB291 UT WOS:A1995QB29100003 ER PT J AU BAMFORD, DJ OKEEFE, A BABIKIAN, DS STEWART, DA STRAWA, AW AF BAMFORD, DJ OKEEFE, A BABIKIAN, DS STEWART, DA STRAWA, AW TI CHARACTERIZATION OF ARCJET FLOWS USING LASER-INDUCED FLUORESCENCE SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER LA English DT Article ID ATOMIC OXYGEN; 2-PHOTON ABSORPTION; CROSS-SECTIONS; EMISSION; STATE AB A sensor based on laser-induced fluorescence has been installed at the 20-MW NASA Ames Aerodynamic Heating Facility, The sensor has provided new, quantitative, real-time information about properties of the arcjet now in the highly dissociated, partially ionized, nonequilibrium regime, Number densities of atomic oxygen, now velocities, heavy particle translational temperatures, and collisional quenching rates have been measured, These results have been used to test and refine computational models of the arcjet flow, The calculated number densities, translational temperatures, and flow velocities are in moderately good agreement with experiment. C1 LOS GATOS RES,LOS GATOS,CA 95030. NASA,AMES RES CTR,INST THERMOSCI,MOFFETT FIELD,CA 94035. NASA,AMES RES CTR,DIV EARTH SYST SCI,MOFFETT FIELD,CA 94035. RP BAMFORD, DJ (reprint author), DEACON RES,DIV THERMOSCI,PALO ALTO,CA 94303, USA. OI Bamford, Douglas/0000-0001-8014-7448 NR 23 TC 5 Z9 5 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0887-8722 J9 J THERMOPHYS HEAT TR JI J. Thermophys. Heat Transf. PD JAN-MAR PY 1995 VL 9 IS 1 BP 26 EP 33 DI 10.2514/3.624 PG 8 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA QB291 UT WOS:A1995QB29100004 ER PT J AU SIEGEL, R AF SIEGEL, R TI REFRACTIVE-INDEX EFFECTS ON TRANSIENT COOLING OF A SEMITRANSPARENT RADIATING LAYER SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER LA English DT Article AB Refractive index effects are examined for transient tooling by radiation and conduction of a gray semitransparent layer. The layer is in a vacuum and so its heat loss is only by internal radiation leaving through its boundaries. Emission within the layer and energy reflected internally from its boundaries increase with the material refractive index. The reflected energy and heat conduction act to distribute energy across the layer and partially equalize the transient temperature distributions. For some conditions significant temperature gradients develop near the boundaries. The numerical solution method provides accurate transient temperature distributions in these regions so that the predicted radiative losses are not in error. An implicit finite difference procedure is used with nonuniform space and time increments. The integrals for the local radiative source in the energy equation are evaluated by Gaussian integration. RP SIEGEL, R (reprint author), NASA,LEWIS RES CTR,ACAD RES,CLEVELAND,OH 44135, USA. NR 11 TC 19 Z9 20 U1 1 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0887-8722 J9 J THERMOPHYS HEAT TR JI J. Thermophys. Heat Transf. PD JAN-MAR PY 1995 VL 9 IS 1 BP 55 EP 62 DI 10.2514/3.628 PG 8 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA QB291 UT WOS:A1995QB29100008 ER PT J AU OCHTERBECK, JM PETERSON, GP UNGAR, EK AF OCHTERBECK, JM PETERSON, GP UNGAR, EK TI DEPRIMING REWETTING OF ARTERIAL HEAT PIPES - COMPARISON WITH SHARE-II FLIGHT EXPERIMENT SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER LA English DT Article AB Utilizing several previously developed analytical expressions, a combined analytical and numerical model was developed to analyze the deprime and reprime/rewetting characteristics of two high-capacity external artery heat pipe designs undergoing externally induced accelerations, The analysis considered three distinct phases of the deprime and reprime/rewetting process: 1) the effect of longitudinal accelerations on the depriming, 2) the time required for repriming of the liquid artery once the longitudinal acceleration had been terminated, and 3) the rewetting characteristics of the circumferential wall grooves, Combining these three processes, a technique was developed by which the effect of external accelerations on the operational characteristics of the external artery heat pipes could be predicted. The results of this analysis were then compared with the experimental results obtained from acceleration tests on these two heat pipe configurations conducted aboard STS-43 in August 1991. The depriming analysis indicated the importance of frictional effects on the liquid configuration during an external acceleration, In addition, the evaporator recovery time of the heat pipe was found to be dominated by the liquid artery reprime/rewetting characteristics as apposed to the characteristics of the circumferential wall grooves, Overall, this technique compared favorably with the microgravity flight results and confirmed the accuracy of the analytical techniques. C1 TEXAS A&M UNIV,DEPT MECH ENGN,COLLEGE STN,TX 77843. NASA,LYNDON B JOHNSON SPACE CTR,DIV CREW & THERMAL SYST,HOUSTON,TX 77058. NR 10 TC 7 Z9 7 U1 1 U2 4 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0887-8722 J9 J THERMOPHYS HEAT TR JI J. Thermophys. Heat Transf. PD JAN-MAR PY 1995 VL 9 IS 1 BP 101 EP 108 DI 10.2514/3.634 PG 8 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA QB291 UT WOS:A1995QB29100014 ER PT J AU JANG, JH AF JANG, JH TI STARTUP CHARACTERISTICS OF A POTASSIUM HEAT-PIPE FROM THE FROZEN STATE SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER LA English DT Article AB The startup characteristics of a potassium heat pipe were studied both analytically and experimentally. Using the radiation heat transfer mode the heat pipe was tested in a vacuum chamber. The transition temperature calculated for potassium was then compared with the experimental results of the heat pipe with various heat inputs. These results show that the heat pipe was inactive until it reached the transition temperature. In addition, during the startup period, the evaporator experienced dryout with a heat input smaller than the capillary limit calculated at the steady state. However, when the working fluid at the condenser was completely melted, the evaporator was rewetted without external aid. The startup period was significantly reduced with a large heat input. C1 SVERDRUP TECHNOL INC,NASA,LERC GRP,CLEVELAND,OH 44135. NR 11 TC 10 Z9 10 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0887-8722 J9 J THERMOPHYS HEAT TR JI J. Thermophys. Heat Transf. PD JAN-MAR PY 1995 VL 9 IS 1 BP 117 EP 122 DI 10.2514/3.636 PG 6 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA QB291 UT WOS:A1995QB29100016 ER PT J AU SCHMIDT, GR NADARAJAH, A CHUNG, TJ KARR, GR AF SCHMIDT, GR NADARAJAH, A CHUNG, TJ KARR, GR TI INFLUENCE OF 2-PHASE THERMOCAPILLARY FLOW ON LIQUID RETENTION IN MICROSCOPIC PORES SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER LA English DT Article ID CRYSTAL-GROWTH; CONVECTION AB An important feature of screened propellant acquisition devices is the retention capability or maximum maintainable pressure difference across the porous barrier separating the liquid and gas. Previous experiments with liquid hydrogen showed a marked reduction in retention when the tank containing the device was pressurized with hydrogen vapor. These tests, however, did not indicate any appreciable degradation in retention with helium pressurization or direct heating through the screen, The objective of this article is to determine if the thermocapillary convection arising from phase change in the microscopic pores of such screens could cause these disparities in performance. A numerical model of flow in a single pore suggests that the thermocapillary-induced gradient in liquid pressure along the surface can strongly affect surface morphology, In an evaporative environment, this gradient exerts a stabilizing influence on surface curvature, and preserves the momentum balance between the liquid and gas. With condensation, it causes a force imbalance and a destabilizing suction in the middle of the pore that reduces retention, Results also indicate that introducing an inert gas, such as helium, suppresses this retention loss mechanism by lowering thermocapillary circulation and its associated interfacial pressure gradient. C1 UNIV ALABAMA,DEPT CHEM ENGN,HUNTSVILLE,AL 35899. UNIV ALABAMA,DEPT MECH ENGN,HUNTSVILLE,AL 35899. RP SCHMIDT, GR (reprint author), NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,PROP LAB,ADV PROP BRANCH,HUNTSVILLE,AL 35812, USA. NR 22 TC 2 Z9 2 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0887-8722 J9 J THERMOPHYS HEAT TR JI J. Thermophys. Heat Transf. PD JAN-MAR PY 1995 VL 9 IS 1 BP 151 EP 158 DI 10.2514/3.641 PG 8 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA QB291 UT WOS:A1995QB29100021 ER PT J AU STOUT, CS TOSCANO, WB COWINGS, PS AF STOUT, CS TOSCANO, WB COWINGS, PS TI RELIABILITY OF PSYCHOPHYSIOLOGICAL RESPONSES ACROSS MULTIPLE MOTION SICKNESS STIMULATION TESTS SO JOURNAL OF VESTIBULAR RESEARCH-EQUILIBRIUM & ORIENTATION LA English DT Article DE MOTION SICKNESS SYMPTOMS; AUTONOMIC RESPONSE STABILITY; PHYSIOLOGICAL RESPONSES; AUTONOMIC RESPONSE STEREOTYPY ID STABILITY AB Although there is general agreement that a high degree of variability exists between subjects in their autonomic nervous system responses to motion sickness stimulation, very little evidence exists that examines the reproducibility of autonomic responses within subjects during motion sickness stimulation. Our objectives mere to examine the reliability of autonomic responses and symptom levels across five testing occasions using the (1) final minute of testing, (2) change in autonomic response and the change in symptom level, and (3) strength of the relationship between the change in symptom level and the change in autonomic responses across the entire motion sickness test. The results indicate that, based on the final minute of testing, the autonomic responses of heart rate, blood volume pulse, and respiration rate are moderately stable across multiple tests. Changes in heart rate, blood volume pulse, respiration rate, and symptoms throughout the test duration are less stable across the tests. Finally, autonomic responses and symptom levels are significantly related across the entire motion sickness test. C1 NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. UNIV CALIF LOS ANGELES,LOS ANGELES,CA. NR 26 TC 7 Z9 8 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0957-4271 J9 J VESTIBUL RES-EQUIL JI J. Vestib. Res.-Equilib. Orientat. PD JAN-FEB PY 1995 VL 5 IS 1 BP 25 EP 33 PG 9 WC Neurosciences; Otorhinolaryngology SC Neurosciences & Neurology; Otorhinolaryngology GA PZ336 UT WOS:A1995PZ33600003 PM 7711945 ER PT J AU SARAVANOS, DA PEREIRA, JM AF SARAVANOS, DA PEREIRA, JM TI DYNAMIC CHARACTERISTICS OF SPECIALTY COMPOSITE STRUCTURES WITH EMBEDDED DAMPING LAYERS SO JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME LA English DT Article AB Damping mechanics for predicting the damped dynamic characteristics in specialty composite structures with compliant interlaminar damping layers are presented. Finite-element based mechanics incorporating a discrete layer (or layer-wise) laminate damping theory are utilized to represent general laminate configurations in terms of lay-up and fiber orientation angles, cross-sectional thickness, shape and boundary conditions. Evaluations of the method with exact solutions and experimental data illustrate its accuracy. Additional parametric studies demonstrate the unique capability of angle-ply composite laminates with cocured interlaminar damping layers to significantly enhance structural damping. RP SARAVANOS, DA (reprint author), NASA,LEWIS RES CTR,STRUCT MECH BRANCH,21000 BROOKPARK RD,MS-498,CLEVELAND,OH 44135, USA. NR 0 TC 20 Z9 25 U1 0 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 1048-9002 J9 J VIB ACOUST JI J. Vib. Acoust.-Trans. ASME PD JAN PY 1995 VL 117 IS 1 BP 62 EP 69 DI 10.1115/1.2873868 PG 8 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA QG226 UT WOS:A1995QG22600009 ER PT B AU Farmer, CB Delbouille, L Roland, G Servais, C AF Farmer, CB Delbouille, L Roland, G Servais, C BE Sauval, AJ Blomme, R Grevesse, N TI The solar spectrum between 16 and 35 mu m SO LABORATORY AND ASTRONOMICAL HIGH RESOLUTION SPECTRA SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Laboratory and Astronomical High Resolution Spectra, in Honour of the 150th Birthday of Charles Vievez (1844-1890) the Pioneer of Astronomical Spectroscopy CY AUG 29-SEP 02, 1994 CL BRUSSELS, BELGIUM C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 1-866733-01-5 J9 ASTR SOC P PY 1995 VL 81 BP 39 EP 52 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE34C UT WOS:A1995BE34C00004 ER PT B AU Geller, M AF Geller, M BE Sauval, AJ Blomme, R Grevesse, N TI Line identification in ATMOS solar spectra SO LABORATORY AND ASTRONOMICAL HIGH RESOLUTION SPECTRA SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Laboratory and Astronomical High Resolution Spectra, in Honour of the 150th Birthday of Charles Vievez (1844-1890) the Pioneer of Astronomical Spectroscopy CY AUG 29-SEP 02, 1994 CL BRUSSELS, BELGIUM C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 5 Z9 5 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 1-866733-01-5 J9 ASTR SOC P PY 1995 VL 81 BP 88 EP 101 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE34C UT WOS:A1995BE34C00008 ER PT B AU Thomas, RJ Neupert, WM AF Thomas, RJ Neupert, WM BE Sauval, AJ Blomme, R Grevesse, N TI Extreme ultraviolet spectrum of a solar active region from SERTS SO LABORATORY AND ASTRONOMICAL HIGH RESOLUTION SPECTRA SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Laboratory and Astronomical High Resolution Spectra, in Honour of the 150th Birthday of Charles Vievez (1844-1890) the Pioneer of Astronomical Spectroscopy CY AUG 29-SEP 02, 1994 CL BRUSSELS, BELGIUM C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 1-866733-01-5 J9 ASTR SOC P PY 1995 VL 81 BP 105 EP 106 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE34C UT WOS:A1995BE34C00010 ER PT B AU Sirota, JM Weber, M Steyert, D Reuter, D AF Sirota, JM Weber, M Steyert, D Reuter, D BE Sauval, AJ Blomme, R Grevesse, N TI Absolute line intensities in the nu(9) region (420 to 480 cm(-1)) of HNO3 by TDL spectroscopy SO LABORATORY AND ASTRONOMICAL HIGH RESOLUTION SPECTRA SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Laboratory and Astronomical High Resolution Spectra, in Honour of the 150th Birthday of Charles Vievez (1844-1890) the Pioneer of Astronomical Spectroscopy CY AUG 29-SEP 02, 1994 CL BRUSSELS, BELGIUM C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RI Weber, Mark/F-1409-2011 OI Weber, Mark/0000-0001-8217-5450 NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 1-866733-01-5 J9 ASTR SOC P PY 1995 VL 81 BP 335 EP 337 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE34C UT WOS:A1995BE34C00058 ER PT B AU Sirota, JM Weber, M Steyert, D Reuter, D AF Sirota, JM Weber, M Steyert, D Reuter, D BE Sauval, AJ Blomme, R Grevesse, N TI Absolute intensities for the (nu(1)+2 nu(2)(2))Pi<-3 nu(3)(2) band in carbon dioxide SO LABORATORY AND ASTRONOMICAL HIGH RESOLUTION SPECTRA SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Laboratory and Astronomical High Resolution Spectra, in Honour of the 150th Birthday of Charles Vievez (1844-1890) the Pioneer of Astronomical Spectroscopy CY AUG 29-SEP 02, 1994 CL BRUSSELS, BELGIUM C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RI Weber, Mark/F-1409-2011 OI Weber, Mark/0000-0001-8217-5450 NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 1-866733-01-5 J9 ASTR SOC P PY 1995 VL 81 BP 338 EP 340 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE34C UT WOS:A1995BE34C00059 ER PT B AU Sofia, UJ Cardelli, JA Savage, BD AF Sofia, UJ Cardelli, JA Savage, BD BE Sauval, AJ Blomme, R Grevesse, N TI Empirical determinations of f-values from interstellar lines SO LABORATORY AND ASTRONOMICAL HIGH RESOLUTION SPECTRA SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Laboratory and Astronomical High Resolution Spectra, in Honour of the 150th Birthday of Charles Vievez (1844-1890) the Pioneer of Astronomical Spectroscopy CY AUG 29-SEP 02, 1994 CL BRUSSELS, BELGIUM C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 1-866733-01-5 J9 ASTR SOC P PY 1995 VL 81 BP 462 EP 463 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE34C UT WOS:A1995BE34C00071 ER PT B AU Carpenter, KG Robinson, RD AF Carpenter, KG Robinson, RD BE Sauval, AJ Blomme, R Grevesse, N TI Line identifications in Goddard High Resolution Spectrograph observations of cool, high-luminosity stars SO LABORATORY AND ASTRONOMICAL HIGH RESOLUTION SPECTRA SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Laboratory and Astronomical High Resolution Spectra, in Honour of the 150th Birthday of Charles Vievez (1844-1890) the Pioneer of Astronomical Spectroscopy CY AUG 29-SEP 02, 1994 CL BRUSSELS, BELGIUM C1 NASA,GODDARD SPACE FLIGHT CTR,LASP,GREENBELT,MD 20771. RI Carpenter, Kenneth/D-4740-2012 NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 1-866733-01-5 J9 ASTR SOC P PY 1995 VL 81 BP 559 EP 560 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE34C UT WOS:A1995BE34C00086 ER PT B AU Sonneborn, G AF Sonneborn, G BE Sauval, AJ Blomme, R Grevesse, N TI Far Ultraviolet Spectroscopic Data for the FUSE mission SO LABORATORY AND ASTRONOMICAL HIGH RESOLUTION SPECTRA SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Laboratory and Astronomical High Resolution Spectra, in Honour of the 150th Birthday of Charles Vievez (1844-1890) the Pioneer of Astronomical Spectroscopy CY AUG 29-SEP 02, 1994 CL BRUSSELS, BELGIUM C1 NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 1-866733-01-5 J9 ASTR SOC P PY 1995 VL 81 BP 602 EP 606 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BE34C UT WOS:A1995BE34C00100 ER PT B AU Kennel, CF AF Kennel, CF GP AMER SOC PHOTOGRAMMETRY & REMOTE SENSING TI Land remote sensing in NASA's Mission to Planet Earth SO LAND SATELLITE INFORMATION IN THE NEXT DECADE LA English DT Proceedings Paper CT Conference on Land Satellite Information in the Next Decade CY SEP 25-28, 1995 CL VIENNA, VA SP Amer Soc Photogrammetry & Remote Sensing, NASA, Natl Ocean & Atmospher Adm, US Geol Survey C1 NASA HEADQUARTERS,OFF MISSION PLANET EARTH,WASHINGTON,DC 20546. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC PHOTOGRAMMETRY & REMOTE SENSING PI BETHESDA PA 5410 GROSVENOR LAND, SUITE 210, BETHESDA, MD 20814-2160 BN 1-57083-025-8 PY 1995 BP A8 EP A10 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BE80W UT WOS:A1995BE80W00003 ER PT B AU Salomonson, VV Stoney, WE AF Salomonson, VV Stoney, WE GP AMER SOC PHOTOGRAMMETRY & REMOTE SENSING TI Land satellite information in the next decade: Conference overview SO LAND SATELLITE INFORMATION IN THE NEXT DECADE LA English DT Proceedings Paper CT Conference on Land Satellite Information in the Next Decade CY SEP 25-28, 1995 CL VIENNA, VA SP Amer Soc Photogrammetry & Remote Sensing, NASA, Natl Ocean & Atmospher Adm, US Geol Survey C1 NASA,GODDARD SPACE FLIGHT CTR,EARTH SCI DIRECTORATE,GREENBELT,MD 20771. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC PHOTOGRAMMETRY & REMOTE SENSING PI BETHESDA PA 5410 GROSVENOR LAND, SUITE 210, BETHESDA, MD 20814-2160 BN 1-57083-025-8 PY 1995 BP A1 EP A3 PG 3 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BE80W UT WOS:A1995BE80W00001 ER PT B AU Shaffer, LR AF Shaffer, LR GP AMER SOC PHOTOGRAMMETRY & REMOTE SENSING TI International issues in remote sensing SO LAND SATELLITE INFORMATION IN THE NEXT DECADE LA English DT Proceedings Paper CT Conference on Land Satellite Information in the Next Decade CY SEP 25-28, 1995 CL VIENNA, VA SP Amer Soc Photogrammetry & Remote Sensing, NASA, Natl Ocean & Atmospher Adm, US Geol Survey C1 NASA,OFF EXTERNAL RELAT,MISSION PLANET EARTH DIV,WASHINGTON,DC 20546. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC PHOTOGRAMMETRY & REMOTE SENSING PI BETHESDA PA 5410 GROSVENOR LAND, SUITE 210, BETHESDA, MD 20814-2160 BN 1-57083-025-8 PY 1995 BP C1 EP C8 PG 8 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BE80W UT WOS:A1995BE80W00012 ER PT B AU Evans, D Freeman, A AF Evans, D Freeman, A GP AMER SOC PHOTOGRAMMETRY & REMOTE SENSING TI Future directions for synthetic aperture radar SO LAND SATELLITE INFORMATION IN THE NEXT DECADE LA English DT Proceedings Paper CT Conference on Land Satellite Information in the Next Decade CY SEP 25-28, 1995 CL VIENNA, VA SP Amer Soc Photogrammetry & Remote Sensing, NASA, Natl Ocean & Atmospher Adm, US Geol Survey C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC PHOTOGRAMMETRY & REMOTE SENSING PI BETHESDA PA 5410 GROSVENOR LAND, SUITE 210, BETHESDA, MD 20814-2160 BN 1-57083-025-8 PY 1995 BP E21 EP E28 PG 8 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BE80W UT WOS:A1995BE80W00023 ER PT B AU Kahle, AB Morrison, AD AF Kahle, AB Morrison, AD GP AMER SOC PHOTOGRAMMETRY & REMOTE SENSING TI Multispectral thermal infrared sensors SO LAND SATELLITE INFORMATION IN THE NEXT DECADE LA English DT Proceedings Paper CT Conference on Land Satellite Information in the Next Decade CY SEP 25-28, 1995 CL VIENNA, VA SP Amer Soc Photogrammetry & Remote Sensing, NASA, Natl Ocean & Atmospher Adm, US Geol Survey C1 JET PROP LAB,PASADENA,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC PHOTOGRAMMETRY & REMOTE SENSING PI BETHESDA PA 5410 GROSVENOR LAND, SUITE 210, BETHESDA, MD 20814-2160 BN 1-57083-025-8 PY 1995 BP E11 EP E20 PG 10 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BE80W UT WOS:A1995BE80W00022 ER PT B AU Sellers, PJ Williams, DL Scolese, CJ Irons, JR King, MD Westmeyer, PA Thompson, LL AF Sellers, PJ Williams, DL Scolese, CJ Irons, JR King, MD Westmeyer, PA Thompson, LL GP AMER SOC PHOTOGRAMMETRY & REMOTE SENSING TI Earth science, Landsat and the Earth Observing System (EOS) SO LAND SATELLITE INFORMATION IN THE NEXT DECADE LA English DT Proceedings Paper CT Conference on Land Satellite Information in the Next Decade CY SEP 25-28, 1995 CL VIENNA, VA SP Amer Soc Photogrammetry & Remote Sensing, NASA, Natl Ocean & Atmospher Adm, US Geol Survey C1 NASA,GODDARD SPACE FLIGHT CTR,EARTH SCI DIRECTORATE,GREENBELT,MD 20771. RI Irons, James/D-8535-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC PHOTOGRAMMETRY & REMOTE SENSING PI BETHESDA PA 5410 GROSVENOR LAND, SUITE 210, BETHESDA, MD 20814-2160 BN 1-57083-025-8 PY 1995 BP E29 EP E45 PG 17 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BE80W UT WOS:A1995BE80W00024 ER PT B AU Williams, DL Irons, JR Lencioni, D Neeck, SP Sellers, PJ Stabnow, WR Taylor, RL Westmeyer, PA AF Williams, DL Irons, JR Lencioni, D Neeck, SP Sellers, PJ Stabnow, WR Taylor, RL Westmeyer, PA GP AMER SOC PHOTOGRAMMETRY & REMOTE SENSING TI Landsat Advanced Technology Instrument (LATI) concepts SO LAND SATELLITE INFORMATION IN THE NEXT DECADE LA English DT Proceedings Paper CT Conference on Land Satellite Information in the Next Decade CY SEP 25-28, 1995 CL VIENNA, VA SP Amer Soc Photogrammetry & Remote Sensing, NASA, Natl Ocean & Atmospher Adm, US Geol Survey C1 NASA,GODDARD SPACE FLIGHT CTR,EARTH SCI DIRECTORATE,GREENBELT,MD 20771. RI Irons, James/D-8535-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC PHOTOGRAMMETRY & REMOTE SENSING PI BETHESDA PA 5410 GROSVENOR LAND, SUITE 210, BETHESDA, MD 20814-2160 BN 1-57083-025-8 PY 1995 BP E66 EP E75 PG 10 WC Geosciences, Multidisciplinary; Remote Sensing SC Geology; Remote Sensing GA BE80W UT WOS:A1995BE80W00027 ER PT J AU NG, LM LYTH, E ZELLER, MV BOYD, DL AF NG, LM LYTH, E ZELLER, MV BOYD, DL TI SURFACE-CHEMISTRY OF PERFLUORO ETHERS - AN INFRARED STUDY OF THE THERMAL-DECOMPOSITION OF (C2F5)(2)O ON AL2O(3) SO LANGMUIR LA English DT Article ID RAY PHOTOELECTRON-SPECTROSCOPY; ROOM-TEMPERATURE; ULTRAHIGH-VACUUM; OXIDE SUPPORTS; THIN-FILMS; ALUMINA; RHODIUM; CHEMISORPTION; CATALYSTS; INVOLVEMENT AB The adsorption and thermal decomposition of a model polyperfluorinated ether on high surface area Al2O3 has been studied using transmission infrared spectroscopy. It has been found that (C2F5)(2)O interacts with the isolated OH groups on the Al2O3 surface, forming an increasing number of associated OH groups from 150 to 600 K. Surface fluoroacetate and surface fluoroformate species are also formed from the thermal decomposition of the (C2F5)(2)O layer. At temperatures higher than 300 K, the surface fluoroacetate converts to surface fluoroformate. Oxidation of the (C2F5)(2)O molecules also occurs on a surface preadsorbed with pyridine, indicating that Lewis acid Al3+ sites, blocked by pyridine adsorption, are not involved in fluoroacetate and fluoroformate production. The absence of a chemical reaction between the (C2F5)(2)O adlayer and a (CH3)(3)SiCl-treated Al2O3 surface indicates that the presence of available surface hydroxyl groups is necessary for the oxidation of the perfluoro ether by Al2O3. A mechanism for the thermal decomposition of(C2F5)(2)O on Al2O3 is proposed. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RP NG, LM (reprint author), CLEVELAND STATE UNIV,DEPT CHEM,CLEVELAND,OH 44115, USA. NR 50 TC 28 Z9 28 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0743-7463 J9 LANGMUIR JI Langmuir PD JAN PY 1995 VL 11 IS 1 BP 127 EP 135 DI 10.1021/la00001a024 PG 9 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA QD410 UT WOS:A1995QD41000024 ER PT B AU DALLAS, JL AFZAL, RS SELKER, MD STEPHEN, MA AF DALLAS, JL AFZAL, RS SELKER, MD STEPHEN, MA BE Bennett, HE Guenther, AH Kozlowski, MR Newnam, BE Soileau, MJ TI Accelerated GLAS exposure station SO LASER-INDUCED DAMAGE IN OPTICAL MATERIALS: 1994 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 26th Annual Boulder Damage Symposium on Laser-Induced Damage in Optical Materials - 1994 CY OCT 24-26, 1994 CL BOULDER, CO SP Univ Cent Florida, Ctr Res & Educ Opt & Lasers, Lawrence Livermore Natl Lab, Los Alamos Natl Lab, Natl Inst Stand & Technol, Naval Air Warfare Ctr, Sandia Natl Labs, Soc Photo Opt Instrumentat Engineers DE OPTICAL DAMAGE; ACCUMULATED LASER EXPOSURE EFFECTS; SPACE OPTICS C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. 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 0-8194-1776-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2428 BP 66 EP 71 DI 10.1117/12.213735 PG 6 WC Materials Science, Coatings & Films; Optics SC Materials Science; Optics GA BD85M UT WOS:A1995BD85M00007 ER PT B AU KESKIKUHA, RAM OSANTOWSKI, JF BLUMENSTOCK, GM GUM, JS FLEETWOOD, CM LEVITON, DB SAHA, TT HAGOPIAN, JG TVEEKREM, JL WRIGHT, GA AF KESKIKUHA, RAM OSANTOWSKI, JF BLUMENSTOCK, GM GUM, JS FLEETWOOD, CM LEVITON, DB SAHA, TT HAGOPIAN, JG TVEEKREM, JL WRIGHT, GA BE Bennett, HE Guenther, AH Kozlowski, MR Newnam, BE Soileau, MJ TI High reflectance coatings and materials for the extreme ultraviolet SO LASER-INDUCED DAMAGE IN OPTICAL MATERIALS: 1994 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 26th Annual Boulder Damage Symposium on Laser-Induced Damage in Optical Materials - 1994 CY OCT 24-26, 1994 CL BOULDER, CO SP Univ Cent Florida, Ctr Res & Educ Opt & Lasers, Lawrence Livermore Natl Lab, Los Alamos Natl Lab, Natl Inst Stand & Technol, Naval Air Warfare Ctr, Sandia Natl Labs, Soc Photo Opt Instrumentat Engineers C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. 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 0-8194-1776-9 J9 P SOC PHOTO-OPT INS PY 1995 VL 2428 BP 294 EP 306 DI 10.1117/12.213712 PG 13 WC Materials Science, Coatings & Films; Optics SC Materials Science; Optics GA BD85M UT WOS:A1995BD85M00032 ER PT B AU RATHER, JDG AF RATHER, JDG BE Bennett, HE Doolittle, RD TI NASAS DAUGHTERS - SELENE, PAMELA AND NAOMI SO LASER POWER BEAMING II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Laser Power Beaming II Conference CY FEB 08-09, 1995 CL SAN JOSE, CA SP Soc Photo Opt Instrumentat Engineers C1 NASA,OFF SPACE ACCESS & TECHNOL,WASHINGTON,DC 20546. 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 0-8194-1723-8 J9 P SOC PHOTO-OPT INS PY 1995 VL 2376 BP 11 EP 20 DI 10.1117/12.208209 PG 10 WC Energy & Fuels; Engineering, Multidisciplinary; Meteorology & Atmospheric Sciences; Optics SC Energy & Fuels; Engineering; Meteorology & Atmospheric Sciences; Optics GA BD26R UT WOS:A1995BD26R00002 ER PT B AU Winker, DM McCormick, MP AF Winker, DM McCormick, MP BE Werner, C TI Observations of aerosol and clouds with LITE SO LIDAR TECHNIQUES FOR REMOTE SENSING II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Lidar Techniques for Remote Sensing II CY SEP 25-26, 1995 CL PARIS, FRANCE SP CNES, NASA, CNR, EOS, Soc Photo Opt Instrumentat Engineers, Commiss European Communities, Directorate Gen Sci Res & Dev C1 NASA,LANGLEY RES CTR,DIV ATMOSPHER SCI,HAMPTON,VA 23681. 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 0-8194-1945-1 J9 P SOC PHOTO-OPT INS PY 1995 VL 2581 BP 70 EP 78 DI 10.1117/12.228522 PG 9 WC Engineering, Aerospace; Meteorology & Atmospheric Sciences; Remote Sensing; Optics SC Engineering; Meteorology & Atmospheric Sciences; Remote Sensing; Optics GA BE78T UT WOS:A1995BE78T00006 ER PT S AU BLACK, S LARKIN, K JACQMOTTE, N WASSERSUG, R PRONYCH, S SOUZA, K AF BLACK, S LARKIN, K JACQMOTTE, N WASSERSUG, R PRONYCH, S SOUZA, K BE Todd, P Anton, HJ Barlow, PW Gerzer, R Heim, JM HemmersbachKrause, R Slenzka, K Kordyum, E Duke, PJ Duprat, AM TI REGULATIVE DEVELOPMENT OF XENOPUS-LAEVIS IN MICROGRAVITY SO LIFE AND GRAVITY: PHYSIOLOGICAL AND MORPHOLOGICAL RESPONSES SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT F1-1 Meeting of COSPAR Scientific Commission F on Life and Gravity - Physiological and Morphological Responses, at the 30th COSPAR Scientific Assembly CY JUL 11-21, 1994 CL HAMBURG, GERMANY SP Comm Space Res, Deut Agentur Raumfahrtangelegenheiten GmbH, European Space Agcy, Ctr Natl Etudes Spatiales, European Low Grav Res Assoc, NASA, Japanese Agcy, US NIH ID EMBRYOS; LARVAE AB To test whether gravity is required for normal amphibian development, Xenopus leavis females were induced to ovulate aboard the orbiting Space Shuttle, Eggs were fertilized in vitro, and although early embryonic stages showed some abnormalities, the embryos were able to regulate and produce nearly normal larvae. These results demonstrate for the first time that a vertebrate can ovulate in the virtual absence of gravity, and that the eggs can develop to a free-living stage. C1 DALHOUSIE UNIV,FAC MED,DEPT ANAT & NEUROBIOL,HALIFAX,NS B3H 4H7,CANADA. NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. RP BLACK, S (reprint author), REED COLL,DEPT BIOL,PORTLAND,OR 97202, USA. NR 20 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042649-2 J9 ADV SPACE RES PY 1995 VL 17 IS 6-7 BP 209 EP 217 PG 9 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences; Physiology SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences; Physiology GA BD67H UT WOS:A1995BD67H00032 ER PT S AU SWANK, JH JAHODA, K ZHANG, W GILES, AB MARSHALL, FM BRADT, HV LEVINE, AM MORGAN, EH REMILLARD, RA ROTHSCHILD, RE GRUBER, DE HINK, PL PELLING, MR AF SWANK, JH JAHODA, K ZHANG, W GILES, AB MARSHALL, FM BRADT, HV LEVINE, AM MORGAN, EH REMILLARD, RA ROTHSCHILD, RE GRUBER, DE HINK, PL PELLING, MR BE Alpar, MA Kiziloglu, U vanParadijs, J TI THE X-RAY TIMING EXPLORER - PROGRESS AND SCIENCE PROSPECTS SO LIVES OF THE NEUTRON STARS SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Study Institute on The Lives of the Neutron Stars CY AUG 29-SEP 12, 1993 CL KEMER, TURKEY SP NATO DE INSTRUMENTS; X-RAY, OBSERVATORY; X-RAY, X-RAY ASTRONOMY C1 NASA,GODDARD SPACE FLIGHT CTR,HIGH ENERGY ASTROPHYS LAB,GREENBELT,MD 20771. RI Jahoda, Keith/D-5616-2012 NR 0 TC 6 Z9 6 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-3246-6 J9 NATO ADV SCI INST SE PY 1995 VL 450 BP 525 EP 542 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC67Y UT WOS:A1995BC67Y00050 ER PT S AU Olla, BL Davis, MW Ryer, CH Sogard, SM AF Olla, BL Davis, MW Ryer, CH Sogard, SM BE Pittman, K Batty, RS Verreth, J TI Behavioural responses of larval and juvenile walleye pollock (Theragra chalcogramma): Possible mechanisms controlling distribution and recruitment SO MASS REARING OF JUVENILE FISH SE ICES MARINE SCIENCE SYMPOSIA LA English DT Proceedings Paper CT ICES Symposium on Mass Rearing of Juvenile Fish CY JUN 21-23, 1993 CL BERGEN, NORWAY SP ICES C1 HATFIELD MARINE SCI CTR,NATL MARINE FISHERIES SERV,COOPERAT INST MARINE RESOURCE STUDIES,NEWPORT,OR 97365. NR 0 TC 9 Z9 10 U1 0 U2 2 PU INT COUNCIL EXPLORATION SEA PI COPENHAGEN K PA CHARLOTTENLUND SLOT, DK-1261 COPENHAGEN K, DENMARK SN 0906-060X J9 ICES MAR SC PY 1995 VL 201 BP 3 EP 15 PG 13 WC Fisheries; Marine & Freshwater Biology SC Fisheries; Marine & Freshwater Biology GA BE71B UT WOS:A1995BE71B00002 ER PT B AU SIOCHI, EJ YOUNG, PR BRYANT, RG AF SIOCHI, EJ YOUNG, PR BRYANT, RG BE Harmston, D Carson, R Bailey, GD Riel, FJ TI Effect of molecular weight on the properties of a soluble polyimide SO MATERIALS CHALLENGE DIVERSIFICATION AND THE FUTURE, BOOKS 1 AND 2: 40TH INTERNATIONAL SAMPE SYMPOSIUM AND EXHIBITION SE SCIENCE OF ADVANCED MATERIALS AND PROCESS ENGINEERING SERIES LA English DT Proceedings Paper CT 40th International SAMPE Symposium and Exhibition on Materials Challenge Diversification and the Future CY MAY 08-11, 1995 CL ANAHEIM, CA SP Soc Adv Mat & Proc Engn DE POLYIMIDE; MOLECULAR WEIGHTS; PHYSICAL PROPERTIES C1 NASA,LANGLEY RES CTR,HAMPTON,VA 23681. NR 0 TC 5 Z9 5 U1 0 U2 0 PU SOC ADVANCEMENT MATERIAL & PROCESS ENGINEERING PI COVINA PA 843 W GLENTANA ST, PO BOX 2459, COVINA, CA 91722 BN 0-938994-72-7 J9 SCI ADV MAT PY 1995 VL 40 BP 11 EP 18 PN BK 1-2 PG 4 WC Materials Science, Characterization & Testing; Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA BD74T UT WOS:A1995BD74T00002 ER PT B AU GINTY, CA GRAY, HR AF GINTY, CA GRAY, HR BE Harmston, D Carson, R Bailey, GD Riel, FJ TI Emerging applications of advanced materials in NASA's HITEMP Program SO MATERIALS CHALLENGE DIVERSIFICATION AND THE FUTURE, BOOKS 1 AND 2: 40TH INTERNATIONAL SAMPE SYMPOSIUM AND EXHIBITION SE SCIENCE OF ADVANCED MATERIALS AND PROCESS ENGINEERING SERIES LA English DT Proceedings Paper CT 40th International SAMPE Symposium and Exhibition on Materials Challenge Diversification and the Future CY MAY 08-11, 1995 CL ANAHEIM, CA SP Soc Adv Mat & Proc Engn DE HIGH TEMPERATURE COMPOSITES; AERONAUTICS PROPULSION SYSTEMS C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC ADVANCEMENT MATERIAL & PROCESS ENGINEERING PI COVINA PA 843 W GLENTANA ST, PO BOX 2459, COVINA, CA 91722 BN 0-938994-72-7 J9 SCI ADV MAT PY 1995 VL 40 BP 242 EP 248 PN BK 1-2 PG 3 WC Materials Science, Characterization & Testing; Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA BD74T UT WOS:A1995BD74T00023 ER PT B AU GRADY, JE AF GRADY, JE BE Harmston, D Carson, R Bailey, GD Riel, FJ TI Engine materials development for NASA's high speed civil transport SO MATERIALS CHALLENGE DIVERSIFICATION AND THE FUTURE, BOOKS 1 AND 2: 40TH INTERNATIONAL SAMPE SYMPOSIUM AND EXHIBITION SE SCIENCE OF ADVANCED MATERIALS AND PROCESS ENGINEERING SERIES LA English DT Proceedings Paper CT 40th International SAMPE Symposium and Exhibition on Materials Challenge Diversification and the Future CY MAY 08-11, 1995 CL ANAHEIM, CA SP Soc Adv Mat & Proc Engn C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC ADVANCEMENT MATERIAL & PROCESS ENGINEERING PI COVINA PA 843 W GLENTANA ST, PO BOX 2459, COVINA, CA 91722 BN 0-938994-72-7 J9 SCI ADV MAT PY 1995 VL 40 BP 249 EP 256 PN BK 1-2 PG 4 WC Materials Science, Characterization & Testing; Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA BD74T UT WOS:A1995BD74T00024 ER PT B AU HARDING, DR SUTTER, JK CRANE, EA ORTIZ, R AF HARDING, DR SUTTER, JK CRANE, EA ORTIZ, R BE Harmston, D Carson, R Bailey, GD Riel, FJ TI Optimizing the performance of barrier coatings on PMCs for aircraft engine applications SO MATERIALS CHALLENGE DIVERSIFICATION AND THE FUTURE, BOOKS 1 AND 2: 40TH INTERNATIONAL SAMPE SYMPOSIUM AND EXHIBITION SE SCIENCE OF ADVANCED MATERIALS AND PROCESS ENGINEERING SERIES LA English DT Proceedings Paper CT 40th International SAMPE Symposium and Exhibition on Materials Challenge Diversification and the Future CY MAY 08-11, 1995 CL ANAHEIM, CA SP Soc Adv Mat & Proc Engn DE BARRIER COATINGS; HIGH TEMPERATURE POLYMER MATRIX COMPOSITES; POLYIMIDES (PMR-II-50) C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SOC ADVANCEMENT MATERIAL & PROCESS ENGINEERING PI COVINA PA 843 W GLENTANA ST, PO BOX 2459, COVINA, CA 91722 BN 0-938994-72-7 J9 SCI ADV MAT PY 1995 VL 40 BP 257 EP 267 PN BK 1-2 PG 3 WC Materials Science, Characterization & Testing; Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA BD74T UT WOS:A1995BD74T00025 ER PT B AU MEADER, MA AF MEADER, MA BE Harmston, D Carson, R Bailey, GD Riel, FJ TI High temperature polymer matrix composites for aeropropulsion applications SO MATERIALS CHALLENGE DIVERSIFICATION AND THE FUTURE, BOOKS 1 AND 2: 40TH INTERNATIONAL SAMPE SYMPOSIUM AND EXHIBITION SE SCIENCE OF ADVANCED MATERIALS AND PROCESS ENGINEERING SERIES LA English DT Proceedings Paper CT 40th International SAMPE Symposium and Exhibition on Materials Challenge Diversification and the Future CY MAY 08-11, 1995 CL ANAHEIM, CA SP Soc Adv Mat & Proc Engn DE POLYIMIDES; HIGH TEMPERATURE COMPOSITES; THERMOSET RESINS POLYMERS C1 NASA,LEWIS RES CTR,DIV MAT,POLYMERS BRANCH,CLEVELAND,OH 44135. NR 0 TC 6 Z9 6 U1 0 U2 1 PU SOC ADVANCEMENT MATERIAL & PROCESS ENGINEERING PI COVINA PA 843 W GLENTANA ST, PO BOX 2459, COVINA, CA 91722 BN 0-938994-72-7 J9 SCI ADV MAT PY 1995 VL 40 BP 268 EP 276 PN BK 1-2 PG 3 WC Materials Science, Characterization & Testing; Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA BD74T UT WOS:A1995BD74T00026 ER PT B AU VANNUCCI, RD CHRISZT, JK AF VANNUCCI, RD CHRISZT, JK BE Harmston, D Carson, R Bailey, GD Riel, FJ TI Low cost non-MDA polyimides for high temperature applications SO MATERIALS CHALLENGE DIVERSIFICATION AND THE FUTURE, BOOKS 1 AND 2: 40TH INTERNATIONAL SAMPE SYMPOSIUM AND EXHIBITION SE SCIENCE OF ADVANCED MATERIALS AND PROCESS ENGINEERING SERIES LA English DT Proceedings Paper CT 40th International SAMPE Symposium and Exhibition on Materials Challenge Diversification and the Future CY MAY 08-11, 1995 CL ANAHEIM, CA SP Soc Adv Mat & Proc Engn DE NON-MDA PMR; POLYIMIDES; ADVANCED COMPOSITES C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 4 Z9 4 U1 0 U2 0 PU SOC ADVANCEMENT MATERIAL & PROCESS ENGINEERING PI COVINA PA 843 W GLENTANA ST, PO BOX 2459, COVINA, CA 91722 BN 0-938994-72-7 J9 SCI ADV MAT PY 1995 VL 40 BP 277 EP 287 PN BK 1-2 PG 3 WC Materials Science, Characterization & Testing; Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA BD74T UT WOS:A1995BD74T00027 ER PT B AU ROTH, DJ BAAKLINI, GY SUTTER, JK BODIS, JR LEONHARDT, TA CRANE, EA AF ROTH, DJ BAAKLINI, GY SUTTER, JK BODIS, JR LEONHARDT, TA CRANE, EA BE Harmston, D Carson, R Bailey, GD Riel, FJ TI An NDE approach for characterizing quality problems in polymer matrix composites SO MATERIALS CHALLENGE DIVERSIFICATION AND THE FUTURE, BOOKS 1 AND 2: 40TH INTERNATIONAL SAMPE SYMPOSIUM AND EXHIBITION SE SCIENCE OF ADVANCED MATERIALS AND PROCESS ENGINEERING SERIES LA English DT Proceedings Paper CT 40th International SAMPE Symposium and Exhibition on Materials Challenge Diversification and the Future CY MAY 08-11, 1995 CL ANAHEIM, CA SP Soc Adv Mat & Proc Engn DE NONDESTRUCTIVE TESTING; POLYMER MATRIX COMPOSITES; ULTRASONICS C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC ADVANCEMENT MATERIAL & PROCESS ENGINEERING PI COVINA PA 843 W GLENTANA ST, PO BOX 2459, COVINA, CA 91722 BN 0-938994-72-7 J9 SCI ADV MAT PY 1995 VL 40 BP 288 EP 299 PN BK 1-2 PG 2 WC Materials Science, Characterization & Testing; Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA BD74T UT WOS:A1995BD74T00028 ER PT B AU CANO, RJ MARCHELLO, JM AF CANO, RJ MARCHELLO, JM BE Harmston, D Carson, R Bailey, GD Riel, FJ TI Solution prepreg quality control SO MATERIALS CHALLENGE DIVERSIFICATION AND THE FUTURE, BOOKS 1 AND 2: 40TH INTERNATIONAL SAMPE SYMPOSIUM AND EXHIBITION SE SCIENCE OF ADVANCED MATERIALS AND PROCESS ENGINEERING SERIES LA English DT Proceedings Paper CT 40th International SAMPE Symposium and Exhibition on Materials Challenge Diversification and the Future CY MAY 08-11, 1995 CL ANAHEIM, CA SP Soc Adv Mat & Proc Engn DE PREPREG QUALITY; SOLUTION PREPREGGING C1 NASA,LANGLEY RES CTR,HAMPTON,VA 23665. NR 0 TC 4 Z9 4 U1 0 U2 0 PU SOC ADVANCEMENT MATERIAL & PROCESS ENGINEERING PI COVINA PA 843 W GLENTANA ST, PO BOX 2459, COVINA, CA 91722 BN 0-938994-72-7 J9 SCI ADV MAT PY 1995 VL 40 BP 583 EP 595 PN BK 1-2 PG 3 WC Materials Science, Characterization & Testing; Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA BD74T UT WOS:A1995BD74T00055 ER EF