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There are a total of 1031821 record(s) matching your query.
Sorted by: NASA Center in Ascending order
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Some correlation of rock exposure ages and regolith dynamics
Author(s): Horz, F.; Gibbons, R. V.; Gault, D. E.; Hartung, J. B.; Brownlee, D. E.
Abstract: Exposure age information on lunar rocks and regolith turnover rates are correlated. If plotted in a cumulative fashion, the distribution of spallogenic noble-gas exposure ages is remarkably parallel to the rate at which ...
NASA Center: Ames Research Center, Johnson Space Center
Publication Year: 1975
Added to NTRS: 2004-11-03
Accession Number: 78A46816; Document ID: 19780062907
Frequency conversion system
Abstract: A frequency conversion system comprises first and second gain sources providing first and second frequency radiation outputs where the second gain source receives as input the output of the first gain source and, further, ...
NASA Center: Ames Research Center
Publication Year: 2001
Added to NTRS: 2008-01-30
Document ID: 20080004651
Circularity of Martian craters.
Author(s): Oberbeck, V. R.; Aoyagi, M.; Murray, J. B.
Abstract: A modified method of calculating crater circularity based on the average deviation of crater radius from mean radius is presented and used to calculate circularity of Martian craters. Calculation of the circularity ...
NASA Center: Ames Research Center
Publication Year: 1972
Added to NTRS: 2004-11-03
Accession Number: 73A37800; Document ID: 19730052998
Effect of simulated weightlessness on the immune system in rats
Author(s): Caren, L. D.; Mandel, A. D.; Nunes, J. A.
Abstract: Rats suspended in a model system designed to simulate many aspects of weightlessness were immunized with sheep red blood cells. Parameters measured on these and control rats included titers of anti-sheep red blood cell ...
NASA Center: Ames Research Center
Publication Year: 1980
Added to NTRS: 2004-11-03
Accession Number: 80A25894; Document ID: 19800041724
Numerical simulation of a ramjet inlet flowfield in response to large amplitude combustor pressure oscillation
Author(s): Hsieh, T.; Wardlaw, A. B., Jr.; Coakley, T.
Abstract: The unsteady flow of a two-dimensional ramjet inlet is studied numerically by solving the Navier-Stokes equation with a two-equation turbulence model. Unsteadiness is introduced by prescribing the pressure disturbance at the ...
NASA Center: Ames Research Center
Publication Year: 1984
Added to NTRS: 2004-11-03
Accession Number: 84A35662; Document ID: 19840052875; Report Number: AIAA PAPER 84-1363
Full configuration-interaction benchmark calculations for AlH
Author(s): Bauschlicher, Charles W., Jr.; Langhoff, Stephen R.
Abstract: Full CI and CASSCF/SOCI theoretical computations are presented for the X 1Sigma(), A 1Pi, and C 1Sigma() states of AlH. The aim is to establish benchmark data to calibrate methods which describe valence-Rydberg transitions ...
NASA Center: Ames Research Center
Publication Year: 1988
Added to NTRS: 2004-11-03
Accession Number: 88A49872; Document ID: 19880062645
A perspective of theoretical and applied computational fluid dynamics
Author(s): Kutler, P.
Abstract: The present effectiveness and future promise of computational fluid dynamics (CFD) are discussed. The CFD ideal of computer-designed flight vehicles and the progress that has been made toward its achievement, expressed in ...
NASA Center: Ames Research Center
Publication Year: 1983
Added to NTRS: 2004-11-03
Accession Number: 83A16477; Document ID: 19830035259; Report Number: AIAA PAPER 83-0037
An experimental evaluation of head-up display formats
Author(s): Naish, J. M.; Miller, D. L.
Abstract: Three types of head-up display format are investigated. Type 1 is an unreferenced (conventional) flight director, type 2 is a ground referenced flight path display, and type 3 is a ground referenced director. Formats are ...
NASA Center: Ames Research Center
Publication Year: 1980
Added to NTRS: 2008-07-29
Accession Number: 80N28349; Document ID: 19800019848; Report Number: A-7970, NASA-TP-1550
Gravity Sensors and the Role of 3-D Visualization and Simulation in Biomedical Research
Author(s): Ross, Muriel D.
Abstract: Ross 3.0 software was developed in the Biocomputation Center for semi-automated reconstruction of objects from serial thin sections. Data are captured directly from a transmission electron microscope via a video camera to a ...
NASA Center: Ames Research Center
Publication Year: 1995
Added to NTRS: 2004-11-03
Document ID: 20020037618
A hardware/software simulation for the video tracking system of the Kuiper Airborne Observatory telescope
Author(s): Boozer, G. A.; Mckibbin, D. D.; Haas, M. R.; Erickson, E. F.
Abstract: This simulator was created so that C-141 Kuiper Airborne Observatory investigators could test their Airborne Data Acquisition and Management System software on a system which is generally more accessible than the ADAMS on ...
NASA Center: Ames Research Center
Publication Year: 1984
Added to NTRS: 2004-11-03
Accession Number: 84N25562; Document ID: 19840017494; Report Number: A-9662, NAS 1.15:85896, NASA-TM-85896
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