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  • 1
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    Sodium sulfur battery flight experiment definition study (1989)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Sodium-sulfur batteries were identified as the most likely successor to nickel-hydrogen batteries for space applications. One advantage of the Na/S battery system is that the usable specific energy is two to three times that of nickel-hydrogen batteries. This represents a significant launch cost savings or increased payload mass capabilities. Sodium-sulfur batteries support NASA OAST's proposed Civil Space Technology Initiative goal of a factor of two improvement in spacecraft power system performance, as well as the proposed Spacecraft 2000 initiative. The sodium-sulfur battery operates at between 300 and 400 C, using liquid sodium and sulfur/polysulfide electrodes and solid ceramic electrolyte. The transport of the electrode materials to the surface of the electrolyte is through wicking/capillary forces. These critical transport functions must be demonstrated under actual microgravity conditions before sodium-sulfur batteries can be confidently utilized in space. Ford Aerospace Corporation, under contract to NASA Lewis Research Center, is currently working on the sodium-sulfur battery space flight experiment definition study. The objective is to design the experiment that will demonstrate operation of the sodium-sulfur battery/cell in the space environment with particular emphasis on evaluation of microgravity effects. Experimental payload definitions were completed and preliminary designs of the experiment were defined.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA, Lewis Research Center, Space Electrochemical Research and Technology Conference: Abstracts; p 36
    Format: application/pdf
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  • 2
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    Parametric amplification in AgGaSe2 (1989)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: AgGaSe2 has been grown, annealed, and characterized for the mid-IR. Characterization includes measurement of the average power-limiting factors including absorption and the variation of the refractive indices with temperature. Using specially annealed crystals 20 mm long and a Ho:YAG pump, parametric amplification at 3.39 microns has achieved a gain of 2.9 with a peak power input of only 8 MW/sq cm.
    Keywords: LASERS AND MASERS
    Type: Applied Optics (ISSN 0003-6935); 28; 5162-516
    Format: text
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  • 3
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    Monthly surface thermal forcing in the tropical Pacific from 1980 to 1983 (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Monthly distributions of surface latent heat flux and solar irradiance in the tropical Pacific were computed from observations of the scanning multichannel microwave radiometer on Nimbus-7 and the visible infrared spin scan radiometer on GOES-W. They are the dominant variable components of the surface heat flux, the sum of which gives the approximate thermal forcing on the ocean. Monthly maps of this sum, from January 1980 to September 1983, and within 20 deg N and 20 deg S, 180 deg and 80 deg W, are presented.
    Keywords: OCEANOGRAPHY
    Type: NASA-CR-183033 , JPL-PUBL-89-42 , NAS 1.26:183033
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Two designs for an orbital transfer vehicle (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Orbital Transfer Vehicle (OTV) and systems were researched in the following areas: avionics, crew systems, electrical power systems, environmental control/life support systems, navigation and orbital maneuvers, propulsion systems, reaction control systems (RCS), servicing systems, and structures.
    Keywords: SPACE TRANSPORTATION
    Type: NASA-CR-184698 , NAS 1.26:184698 , REPT-3
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  • 5
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    Conceptual design of a manned orbital transfer vehicle (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: With the advent of the manned space station, man now requires a spacecraft based on the space station with the ability to deploy, recover, and repair satellites quickly and economically. Such a craft would prolong and enhance the life and performance of many satellites. A basic design was developed for an orbital tansfer vehicle (OTV). The basic design criteria are discussed. The design of the OTV and systems were researched in the following areas: avionics, crew systems, electrical power systems, environmental control/life support systems, navigation and orbital maneuvers, propulsion systems, reaction control systems (RCS), servicing systems, and structures. The basic concepts in each of the areas are summarized.
    Keywords: SPACE TRANSPORTATION
    Type: NASA-CR-183391 , NAS 1.26:183391
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  • 6
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    Memory and action grammar factors that influence the human-computer interaction (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: Massachusetts Inst. of Tech., 19th Annual Conference on Manual Control; p 257-274
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  • 7
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    [NASA/DOD Aerospace Knowledge Diffusion Research Project. Report 1, part 2:] Technical communications in aeronautics: Results of an exploratory study (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A study was undertaken that explored several aspects of technical communications in aeronautics. The study, which utilized survey research in the form of a self-administered questionnaire, was sent to 2,000 randomly selected members of the American Institute of Aeronautics and Astronautics. Six hundred and six usable questionnaires (30.3 percent) were received by the established cut off date. Part 2 of this study lists appendices to part 1, including survey instrument, aggregate totals, cross tabulations, and open-ended comments.
    Keywords: DOCUMENTATION AND INFORMATION SCIENCE
    Type: NASA-TM-101534-REPT-1-PT-2 , NAS 1.15:101534-REPT-1-PT-2 , AD-A252063
    Format: application/pdf
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  • 8
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    [NASA/DOD Aerospace Knowledge Diffusion Research Project. Report 1, part 1:] Technical communications in aeronautics: Results of an exploratory study (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A study was undertaken that explored several aspects of technical communications in aeronautics. The study, which utilized survey research in the form of a self-administered questionnaire, was sent to 2,000 randomly selected members of the American Institute of Aeronautics and Astronautics. Six hundred and six usable questionnaires (30.3 percent) were received by the established cut off date. The study had five objectives. The first was to solicit the opinions of aeronautical engineers and scientists regarding the importance of technical communications to their profession; second, to determine their use and production of technical communications; third, to seek their views on the content of an undergraduate course in technical communications; fourth, to determine their use of libraries/technical information centers; and finally, to determine the use and importance of computer and information technology to them. The findings add considerable information to the knowledge of technical communications practices among aeronautical engineers and scientists and reinforce some of the conventional wisdom about technical communications and question other widely-held notions.
    Keywords: DOCUMENTATION AND INFORMATION SCIENCE
    Type: NASA-TM-101534-REPT-1-PT-1 , NAS 1.15:101534-REPT-1-PT-1 , AD-A252062
    Format: application/pdf
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  • 9
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    Microstructure-property relationships in directionally solidified single-crystal nickel-base superalloys (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: This paper discusses some of the microstructural features which influence the creep properties of directionally solidified and single-crystal nickel-base superalloys. Gamma prime precipitate size and morphology, gamma-gamma (prime) lattice mismatch, phase instability, alloy composition, and processing variations are among the factors considered. Recent experimental results are reviewed and related to the operative deformation mechanisms and to the corresponding mechanical properties. Special emphasis is placed on the creep behavior of single-crystal superalloys at high temperatures, where directional gamma (prime) coarsening is prominent, and at lower temperatures, where gamma (prime) coarsening rates are significantly reduced. It can be seen that very subtle changes in microstructural features can have profound effects on the subsequent properties of these materials.
    Keywords: METALLIC MATERIALS
    Type: MiCon 86: Optimization of processing, properties, and service performance through microstructural control; May 15, 16, 1986; Philadelphia, PA; United States
    Format: text
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  • 10
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    Sodium-sulfur battery flight experiment definition study (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: NaS batteries have been identified as the most likely successor to space Ni-H2 or Ni-Cd batteries, primarily due to a mass reduction by a factor 2 to 3 over Ni-H2 and by a factor of 4 over Ni-Cd. This yields major launch cost reductions or payload mass improvements. NaS batteries support NASA OAST's proposed Civil Space Technology Initiative goal of a factor of two improvement in spacecraft 2000 initiative. Since Ni-H2 and Ni-Cd batteries have been space flight proven, it is essential to have the flight experiment to establish a national space technology base to demonstrate the operation of the NaS battery for space applications.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA, Lewis Research Center, Space Electrochemical Research and Technology (SERT), 1989; p 297-30
    Format: application/pdf
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