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  • Other Sources  (4)
  • AEROSPACE MEDICINE  (2)
  • ELECTRONICS AND ELECTRICAL ENGINEERING  (2)
  • Life and Medical Sciences
  • 2005-2009
  • 1990-1994
  • 1985-1989  (4)
  • 1945-1949
  • 1986  (4)
  • 1946
  • 1
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    Space motion sickness (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Space motion sickness clinical characteristics, time course, prediction of susceptibility, and effectiveness of countermeasures were evaluated. Although there is wide individual variability, there appear to be typical patterns of symptom development. The duration of symptoms ranges from several hours to four days with the majority of individuals being symptom free by the end of third day. The etiology of this malady remains uncertain but evidence points to reinterpretation of otolith inputs as being a key factor in the response of the neurovestibular system. Prediction of susceptibility and severity remains unsatisfactory. Countermeasures tried include medications, preflight adaptation, and autogenic feedback training. No countermeasure is entirely successful in eliminating or alleviating symptoms.
    Keywords: AEROSPACE MEDICINE
    Type: ESA Proceedings of 2nd International Conference on Space Physiology; p 137-142
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Determining the influence and effects of manufacturing variables on sulfur dioxide cells (1986)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A survey of the Li/SO2 manufacturing community was conducted to determine where variability exists in processing. The upper and lower limits of these processing variables might, by themselves or by interacting with other variables, influence safety, performance, and reliability. A number of important variables were identified and a comprehensive design experiment is being proposed to make the proper determinations.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: NASA. Goddard Space Flight Center The 1985 Goddard Space Flight Center Battery Workshop (date); p 67 - 74
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Three dimensional simulation of the operation of a hollow cathode electron emitter on the Shuttle orbiter (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Several researchers have suggested using hollow cathodes as plasma contactors for electrodynamic tethers, particularly to prevent the shuttle orbiter from charging to large negative potentials. Previous studies have shown that fluid models with anomalous scattering can describe the electron transport in hollow cathode generated plasmas. An improved theory of the hollow cathode plasmas is developed and computational results using the theory are compared with laboratory experiment. Numerical predictions for a hollow cathode plasma source of the type considered for use on the shuttle are presented as are three-dimensional NASCAP/LEO calculations of the emitted ion trajectories and the resulting potentials in the vicinity of the orbiter. The computer calculations show that the hollow cathode plasma source makes vastly superior contact with the ionospheric plasma compared with either an electron gun or passive ion collection by the orbiter.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Bedrest in healthy women: Effects of menstrual function and oral contraceptives (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: With the development of the space shuttle program, space flight for the first time is available to individuals who have not been specially selected and trained to be astronauts. In addition, women are being actively recruited into the space program, both as mission specialists and as career astronauts. One purpose of this project was to examine some of the physiological responses of women to a simulated weightlessness program (12 day horizontal bedrest), to compare their responses to those reported in men during similar programs, and to test whether menstrual function might alter some of the physiological changes which occur during bedrest, specifically changes in the plasma volume, exercise tolerance, and venous compliance before and after bedrest.
    Keywords: AEROSPACE MEDICINE
    Type: NASA-CR-171946 , NAS 1.26:171946
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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