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There are a total of 25203 record(s) matching your query.
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Overview of NASA Rotorcraft Human Factors Research
Author(s): Hart, Sandra G.
Abstract: The principal areas of research supported by the NASA Rotorcraft Human Factors Research Branch are reviewed. The program elements addressed include situational awareness, pilot/vehicle interface, mission management, and ...
NASA Center: Ames Research Center
Publication Year: 1989
Added to NTRS: 2004-11-03
Accession Number: 90A28186; Document ID: 19900041131
Classical trajectory studies of gas phase reaction dynamics and kinetics using ab initio potential energy surfaces
Author(s): Jaffe, Richard L.; Pattengill, Merle D.; Schwenke, David W.
Abstract: Strategies for constructing global potential energy surfaces from a limited number of accurate ab initio electronic energy calculations are discussed. Generally, these data are concentrated in small regions of configuration ...
NASA Center: Ames Research Center
Publication Year: 1989
Added to NTRS: 2004-11-03
Accession Number: 90A16271; Document ID: 19900029216
Theoretical study of the far-infrared A 3Sigma(-)g - X 3Pi(u) transition in Al2
Author(s): Bauschlicher, Charles W., Jr.; Langhoff, Stephen R.
Abstract: The transition between the X 3Pi(u) ground state of Al2 and the first excited state A 3Sigma(-)g is investigated theoretically by means of CASSCF computations. The Einstein coefficients are determined on the basis of the ...
NASA Center: Ames Research Center
Publication Year: 1989
Added to NTRS: 2004-11-03
Accession Number: 89A37288; Document ID: 19890049917
The topology and vorticity dynamics of a three-dimensional plane compressible wake
Author(s): Chen, Jacqueline H.; Cantwell, Brian J.; Mansour, Nagi N.
Abstract: The three-dimensional aspects of transition in a low Mach number plane compressible wake are studied numerically. Comparisons are made between the topology of the velocity field and the vorticity dynamics of the flow based ...
NASA Center: Ames Research Center
Publication Year: 1989
Added to NTRS: 2004-11-03
Accession Number: 91A46302; Document ID: 19910061679
Paraventricular Stimulation with Glutamate Elicits Bradycardia and Pituitary Responses
Author(s): Darlington, Daniel N.; Miyamoto, Michael; Keil, Lanny C.; Dallman, Mary F.
Abstract: The excitatory neurotransmitter, L-glutamate (0.5 M, pH 7.4), or the organic acid, acetate (0.5 M, pH 7.4), was microinjected (50 nl over 2 min) directly into the paraventricular nuclei (PVN) of pentobarbital ...
NASA Center: Ames Research Center
Publication Year: 1989
Added to NTRS: 2004-11-03
Document ID: 19990116342; Report Number: NAS 1.26:2048811, NASA/CR-1997-204881
Techniques for optimizing human-machine information transfer related to real-time interactive display systems
Author(s): Granaas, Michael M.; Rhea, Donald C.
Abstract: In recent years the needs of ground-based researcher-analysts to access real-time engineering data in the form of processed information has expanded rapidly. Fortunately, the capacity to deliver that information has also ...
NASA Center: Ames Research Center
Publication Year: 1989
Added to NTRS: 2005-08-25
Accession Number: 90N11441; Document ID: 19900002125; Report Number: AIAA PAPER 89-0151, H-1506, NAS 1.15:100450, NASA-TM-100450
Annihilation of ecosystems by large asteroid impacts on the early earth
Author(s): Sleep, Norman H.; Zahnle, Kevin J.; Kasting, James F.; Morowitz, Harold J.
Abstract: Large asteroid impacts produced globally lethal conditions by evaporating large volumes of ocean water on the early earth. The earth may have been continuously habitable by ecosystems that did not depend on photosynthesis as ...
NASA Center: Ames Research Center
Publication Year: 1989
Added to NTRS: 2004-11-03
Accession Number: 90A14848; Document ID: 19900027793
Dust coagulation in ISM
Author(s): Chokshi, Arati; Tielens, Alexander G. G. M.; Hollenbach, David
Abstract: Coagulation is an important mechanism in the growth of interstellar and interplanetary dust particles. The microphysics of the coagulation process was theoretically analyzed as a function of the physical properties of the ...
NASA Center: Ames Research Center
Publication Year: 1989
Added to NTRS: 2008-05-31
Accession Number: 91N14968; Document ID: 19910005655
Time and frequency-domain identification and verification of BO-105 dynamic models
Author(s): Kaletka, Juergen; Gruenhagen, Wolfgang V.; Tischler, Mark B.; Fletcher, Jay W.
Abstract: Mathematical models for the dynamics of the DLR BO 105 helicopter are extracted from flight test data using two different approaches: frequency-domain and time-domain identification. Both approaches are reviewed. Results ...
NASA Center: Ames Research Center
Publication Year: 1989
Added to NTRS: 2004-11-03
Accession Number: 90N18389; Document ID: 19900009073; Report Number: AD-A216828
Microgravity particle research on the Space Station - The gas-grain simulation facility
Author(s): Fogleman, G.; Huntington, J. L.; Carle, G. C.; Nuth, J. A.
Abstract: In the gravitational field on earth, the large settling rate of micron-sized particles and the effects of gravity-induced convection prohibit many interesting studies of phenomena such as coagulation, collisions, and mutual ...
NASA Center: Ames Research Center, Goddard Space Flight Center
Publication Year: 1989
Added to NTRS: 2004-11-03
Accession Number: 89A44502; Document ID: 19890057131
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