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  • BIOTECHNOLOGY  (4)
  • COMPUTERS  (3)
  • 2015-2019
  • 1970-1974  (7)
  • 1972  (7)
  • 1
    Publication Date: 2016-06-07
    Description: Modifications to NASTRAN code which result from the location, identification, and correction of errors or operational problem areas are reviewed. Addition of improved capability which is structural, executive system oriented, or utility in nature is also considered. NASTRAN efficiencies and inefficiencies are studied.
    Keywords: COMPUTERS
    Type: NASA. Langley Res. Center NASTRAN: Users' Experiences (SEE N72-32867 23-32)
    Format: application/pdf
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  • 2
    Publication Date: 2019-07-13
    Keywords: BIOTECHNOLOGY
    Type: ASME PAPER 72-ENAV-5 , American Society of Mechanical Engineers; Aug 14, 1972 - Aug 16, 1972; San Francisco, CA
    Format: text
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  • 3
    Publication Date: 2019-07-13
    Description: Discussion of the tradeoffs and EC/LS definition for a low cost shuttle launched space station to be launched in the late 1970s for use as a long-term manned scientific laboratory. The space station consists of 14-ft-diam modules, clustered together to support a six-man crew at the initial space station (ISS) level and a 12-man crew at the growth space station (GSS) level. Key design guidelines specify low initial cost and low total program cost and require two separate pressurized habitable compartments with independent lift support capability. The methodology used to select the EC/LS design consisted of systematically reducing quantitative parameters to a common denominator of cost. This approach eliminates many of the inconsistencies that can occur in such decision making. The EC/LS system selected is a partially closed system which recovers urine, condensate, and wash water and concentrates crew expired CO2 for use in a low thrust resistojet propulsion system.
    Keywords: BIOTECHNOLOGY
    Type: ASME PAPER 72-ENAV-17 , American Society of Mechanical Engineers, Environmental Control and Life Support Systems Conference; Aug 14, 1972 - Aug 16, 1972; San Francisco, CA
    Format: text
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  • 4
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    In:  Other Sources
    Publication Date: 2019-07-13
    Description: Consideration of the problems involved in choosing appropriate menus for astronauts carrying out SKYLAB missions lasting up to eight weeks. The problem of planning balanced menus on the basis of prepackaged food items within limitations on the intake of calories, protein, and certain elements is noted, as well as a number of other restrictions of both physical and arbitrary nature. The tailoring of a set of menus for each astronaut on the basis of subjective rankings of each food by the astronaut in terms of a 'measure of pleasure' is described, and a computer solution to this problem by means of a mixed integer programming code is presented.
    Keywords: BIOTECHNOLOGY
    Type: Operations Research Society of America, National Meeting; Apr 26, 1972 - Apr 28, 1972; New Orleans, LA
    Format: text
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  • 5
    Publication Date: 2019-06-27
    Description: A method for a computer-aided design of a class of optimum filters, having specifications in the frequency domain of both magnitude and phase, is described. The method, an extension to the work of Steiglitz, uses the Fletcher-Powell algorithm to minimize a weighted squared magnitude and phase criterion. Results using the algorithm for the design of filters having specified phase as well as specified magnitude and phase compromise are presented.
    Keywords: COMPUTERS
    Type: NASA-TN-D-6709 , L-8162
    Format: application/pdf
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  • 6
    Publication Date: 2019-06-27
    Description: The two water electrolysis systems used in the NASA space station simulation 90-day manned test of a regenerative life support system were refurbished as required and subjected to 26-weeks of testing. The two electrolysis units are both promising systems for oxygen and hydrogen generation and both needed extensive long-term testing to evaluate the performance of the respective cell design and provide guidance for further development. Testing was conducted to evaluate performance in terms of current, pressure, variable oxygen demands, and orbital simulation. An automatic monitoring system was used to record, monitor and printout performance data at one minute, ten minute or one-hour intervals. Performance data is presented for each day of system operation for each module used during the day. Failures are analyzed, remedial action taken to eliminate problems is discussed and recommendations for redesign for future space applications are stated.
    Keywords: BIOTECHNOLOGY
    Type: NASA-CR-128629 , MDC-G3019 , MSC-07382
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  • 7
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    Publication Date: 2019-06-27
    Description: Applications of the optical computer include an approach for increasing the sharpness of images obtained from the most powerful electron microscopes and fingerprint/credit card identification. The information-handling capability of the various optical computing processes is very great. Modern synthetic-aperture radars scan upward of 100,000 resolvable elements per second. Fields which have assumed major importance on the basis of optical computing principles are optical image deblurring, coherent side-looking synthetic-aperture radar, and correlative pattern recognition. Some examples of the most dramatic image deblurring results are shown.
    Keywords: COMPUTERS
    Type: IEEE Spectrum; 9; Dec. 197
    Format: text
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