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  • Other Sources  (5)
  • ASTRONAUTICS (GENERAL)  (3)
  • AEROSPACE MEDICINE  (2)
  • Life and Medical Sciences
  • 2005-2009
  • 1990-1994
  • 1985-1989  (5)
  • 1945-1949
  • 1986  (5)
  • 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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    Earth vicinity trades and options (1986)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The options for recovering a returned manned Mars spacecraft are surveyed. Earth parking orbits from libration point to low circular are discussed, with a 500 km perigee, 24 hour period elliptical orbit chosen as a baseline for further calculation. Several techniques for recovering up to 100 metric tons of returned spacecraft are investigated, including recovery by a low Earth orbit (LEO) based orbit transfer vehicle (OTV) pushing the spacecraft to LEO, and OTV transporting and aerobrake to the spacecraft, and an OTV delivering propellant to the spacecraft. Methods utilizing OTVs results in less total mass in LEO, but may not be the minimum cost solutions if significant development and testing are required.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA. Marshall Space Flight Center Manned Mars Missions. Working Group Papers, Volume 1, Section 1-4; p 53-65
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    A manned Mars mission concept with artificial gravity (1986)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: A series of simulated manned Mars missions was analyzed by a computer model. Numerous mission opportunities and mission modes were investigated. Sensitivity trade studies were performed of the vehicle all-up mass and propulsion stage sizes as a function of various levels of conservatism in mission velocity increment margins, payload mass and propulsive stage characteristics. The longer duration but less energetic type of conjunction class mission is emphasized. The specific mission opportunity reviewed was for a 1997 departure. From the trade study results, a three and one-half stage vehicle concept evolved, utilizing a Trans-Mars Injection (TMI) first stage derived from the Space Shuttle External Tank (ET).
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA. Marshall Space Flight Center Manned Mars Missions. Working Group Papers, Volume 1, Section 1-4; p 292-305
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Mars lander survey (1986)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The requirements, issues, and design options are reviewed for manned Mars landers. Issues such as high 1/d versus low 1/d shape, parking orbit, and use of a small Mars orbit transfer vehicle to move the lander from orbit to orbit are addressed. Plots of lander mass as a function of Isp, destination orbit, and cargo up and down, plots of initial stack mass in low Earth orbit as a function of lander mass and parking orbit, detailed weight statements, and delta V tables for a variety of options are included. Lander options include a range from minimum landers up to a single stage reusable design. Mission options include conjunction and Venus flyby trajectories using all-cryogenic, hybrid, NERVA, and Mars orbit aerobraking propulsion concepts.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA. Marshall Space Flight Center Manned Mars Missions. Working Group Papers, Volume 1, Section 1-4; p 239-251
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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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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