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  • Other Sources  (4)
  • BIOSCIENCES  (2)
  • SPACE RADIATION  (2)
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  • Other Sources  (4)
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  • 1
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    Blood flow and oxygen uptake during exercise (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A model is developed for predicting oxygen uptake, muscle blood flow, and blood chemistry changes under exercise conditions. In this model, the working muscle mass system is analyzed. The conservation of matter principle is applied to the oxygen in a unit mass of working muscle under transient exercise conditions. This principle is used to relate the inflow of oxygen carried with the blood to the outflow carried with blood, the rate of change of oxygen stored in the muscle myoglobin, and the uptake by the muscle. Standard blood chemistry relations are incorporated to evaluate venous levels of oxygen, pH, and carbon dioxide.
    Keywords: BIOSCIENCES
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    NASA TECHNICAL REPORTS
  • 2
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    Development of mathematical models of environmental physiology (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Selected articles concerned with mathematical or simulation models of human thermoregulation are presented. The articles presented include: (1) development and use of simulation models in medicine, (2) model of cardio-vascular adjustments during exercise, (3) effective temperature scale based on simple model of human physiological regulatory response, (4) behavioral approach to thermoregulatory set point during exercise, and (5) importance of skin temperature in sweat regulation.
    Keywords: BIOSCIENCES
    Type: NASA-CR-115268 , FR-B
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    NASA TECHNICAL REPORTS
  • 3
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    The cosmic-ray He-3/He-4 ratio from 100 to 1600 MeV/amu (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The Superconducting Magnet Instrument for Light Isotopes (SMILI) flew for 19 hours on September 1, 1989, with a residual overburden of 5 g/sq cm. It measured the charge, rigidity, and velocity of 30,000 cosmic-ray helium nuclei, with velocity determined by time-of-flight and Cerenkov techniques. Using these data, the flux and isotopic composition of helium as a function of energy were determined. The observed isotopic composition is consistent with that expected from interstellar propagation models inferred from the secondaries of CNO, in contrast to earlier observations which indicated an overabundance of He-3. We discuss constraints that this result places on cosmic-ray transport and solar modulation models.
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 413; 1; p. 268-280.
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    NASA TECHNICAL REPORTS
  • 4
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    Balloon observations of Galactic cosmic ray helium before and during a Forbush decrease (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The energy spectrum of Galactic cosmic ray helium was measured in two different balloon experiments launched four days apart from Canada: SMILI-I on Sept 1, 1989 and MASS on Sept 5, 1989. A slow Forbush decrease began on Sept 4, 1989 and had not reached its maximum at the time of the MASS flight. Comparison of the balloon measurements shows a fractional decrease of 0.37 to 0.15 in the Helium flux between 200 and 450 MeV/nucleon (1.2-2.0 GV). The rigidity dependence is analyzed in two models and found to be steeper than previous observations. Interplanetary particle data and ground-based Neutron Monitor results are consistent with the balloon observations. Probable sources for this Forbush decrease are discussed.
    Keywords: SPACE RADIATION
    Type: Geophysical Research Letters (ISSN 0094-8276); 20; 17; p. 1743-1746.
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    NASA TECHNICAL REPORTS
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