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  • SPACE RADIATION  (75)
  • Analytical Chemistry and Spectroscopy  (68)
  • ASTROPHYSICS  (41)
  • SPACE VEHICLES  (41)
  • THERMODYNAMICS AND COMBUSTION  (37)
  • BIOSCIENCES  (35)
  • PROPULSION SYSTEMS
  • 1985-1989
  • 1970-1974  (326)
  • 1974  (326)
Collection
Keywords
Publisher
Years
  • 1985-1989
  • 1970-1974  (326)
Year
  • 11
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    Method of magnetobiological indication in clinical laboratory practice (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Data are presented on the use of the method of magnetobiological indication for defining the immunobiological state of patients with very serious diseases. It has been found that the enzymes of a patient react more sensitively to the energy from a magnetic field. It is important that the magnetoreactivity of the enzymes, like the cell forms of the blood in the patients, have a certain relationship to the clinical-nosological forms and the dynamics of the illness of the subject.
    Keywords: BIOSCIENCES
    Type: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 129-140
    Format: text
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    NASA TECHNICAL REPORTS
  • 12
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    Charge composition of cosmic rays between 4 and 100 GV (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Balloon-flight measurements were used to determine ratios of cosmic-ray L nuclei (charge Z ranging from 3 to 5) to M nuclei (Z ranging from 6 to 8) and of VH nuclei (Z from 20 to 27) to M nuclei using a magnetic spectrometer. The purpose of the measurements was to establish whether both ratios vary with rigidity as this would provide evidence for more than one basic acceleration mechanism. The results provide no indication that the VH spectrum is steeper than the M spectrum.
    Keywords: SPACE RADIATION
    Type: Nature; 249; June 28
    Format: text
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    NASA TECHNICAL REPORTS
  • 13
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    A new model of atmospheric gamma rays and its implications for measurement of diffuse cosmic gamma rays from within the atmosphere (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A semi-empirical model is discussed which describes atmospheric gamma rays in the range 0.3 less then or equal to E less than or equal to 10 MeV based on the production per unit mass of air. The model is based on the concept of a source strength (photon/g sec MeV) which is energy- and depth-dependent, and derived from measured fluxes. Quantities such as directional fluxes, angular distributions, and growth curves are calculated directly from this model. The source function is described by four energy-dependent parameters determined empirically from fluxes measured with a 7.5 cm x 7.5 cm Nal counter over the atmospheric depth range from 3.5 to 500 g/sq cm. From S(E,x), obtained for both continuum and discrete gamma rays at lambda = 40 deg, the depth and angle dependence of directional fluxes were calculated. Growth-curve predictions needed to separate atmospheric from diffuse cosmic fluxes were determined.
    Keywords: SPACE RADIATION
    Type: ESRO The Context and Status of Gamma Ray Astronomy; p 137-145
    Format: text
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    NASA TECHNICAL REPORTS
  • 14
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    Extended temperature range ACPS thruster investigation (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The successful hot fire demonstration of a pulsing liquid hydrogen/liquid oxygen and gaseous hydrogen/liquid oxygen attitude control propulsion system thruster is described. The test was the result of research to develop a simple, lightweight, and high performance reaction control system without the traditional requirements for extensive periods of engine thermal conditioning, or the use of complex equipment to convert both liquid propellants to gas prior to delivery to the engine. Significant departures from conventional injector design practice were employed to achieve an operable design. The work discussed includes thermal and injector manifold priming analyses, subscale injector chilldown tests, and 168 full scale and 550 N (1250 lbF) rocket engine tests. Ignition experiments, at propellant temperatures ranging from cryogenic to ambient, led to the generation of a universal spark ignition system which can reliably ignite an engine when supplied with liquid, two phase, or gaseous propellants. Electrical power requirements for spark igniter are very low.
    Keywords: PROPULSION SYSTEMS
    Type: NASA-CR-134655
    Format: application/pdf
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  • 15
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    Observation of a cosmic gamma-ray burst on Apollo 16. II - X-ray time profile and source location (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A burst of X-rays was detected during the trans-earth coast phase of Apollo 16 on Apr. 27, 1972 at 10:68 UT, simultaneously with the observation of a transient event by a gamma-ray spectrometer aboard the same spacecraft. The two instruments provide a broad energy range of more than three orders of magnitude for describing the spectral distribution of this event. The conclusion that the incident flux was X-rays and not charged particles is based on the fact that the particle flux detectors in the Apollo gamma ray spectrometer and on the Vela 6A, which also observed the event, did not respond. The time variation of the total count rate in the X-ray range before and after corrections for detector geometry and the analysis for source direction is presented.
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal; 194; Nov. 15
    Format: text
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  • 16
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    The effect of temperature induced surface tension gradients on bubble mechanics (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Experiments were conducted to examine in detail the influence of surface tension gradient induced flow, the Marangoni effect. One set of studies provided visual results that demonstrated the occurrence and magnitude of the Marangoni effect. Another portion of the work was directed to bubble force measurements. These studies used in deflection of a very fine cantilevered wire with an attached bubble as a means of measuring force with and without temperature gradients. The experimental force data were found to check existing theoretical predictions reasonably well except for the case where the test fluid had a sizeable vapor pressure. In this situation the thermophoretic force on the bubble was much higher than predicted.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Applied Sctientific Research; 29; June 197
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  • 17
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    Comments on papers by Reichert and Wong (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Papers of Reichert and Wong (1971) and Reichert (1972) are referred to as erroneous in stating that in their work with cytochrome c sequences they demonstrated that vertebrates have achieved a higher organized genetic message with a higher fidelity in the DNA-to-protein information processing channel. Arguments are given to contest that statement.
    Keywords: BIOSCIENCES
    Type: Journal of Molecular Evolution; 3; 3, 19; 1974
    Format: text
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  • 18
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    A cosmic gamma ray burst measured by Apollo 16 (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A cosmic gamma ray burst at about 1058:21 UT on April 27, 1972, was detected with an omnidirectional scintillation counter on Apollo 16. The event whose energy was approximately 0.0002 erg/sq cm, was pulse height analyzed in 512 channels over the 0.067 less than or equal to E less than or equal to 5 MeV range, and shows a complex, multipeak structure on a 300 msec time scale. The burst was also measured by a collimated X-ray detector on Apollo 16, giving spectral data in the 2 to 8 keV range which, together with a simultaneous observation by Vela 6A, allows a directional determination.
    Keywords: SPACE RADIATION
    Type: ESRO The Context and Status of Gamma Ray Astronomy; p 11-16
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  • 19
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    Measurements of the 0.1-27 MeV cosmic gamma ray spectrum by Apollos 15 and 16 (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The spectrum of diffuse cosmic gamma rays over the 0.127 MeV range was measured by a 7 x 7 cm omnidirectional NaI counter on Apollo 15 and 16. Location of the spectrometer on a 7.6 m extensible boom, use of precision pulse-height analysis, and operation in several modes permitted data to be obtained from which spacecraft and other background contributions could be separated. Recent measurements verified the Apollo spectrum.
    Keywords: SPACE RADIATION
    Type: ESRO The Context and Status of Gamma Ray Astronomy; p 107-116
    Format: text
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  • 20
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    Effect of gaseous and solid simulated jet plumes on an 040A space shuttle launch configuration at m=1.6 to 2.2 (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The effect of plume-induced flow separation and aspiration effects due to operation of both orbiter and the solid rocket motors on a 0.019-scale model of the launch configuration of the Space Shuttle Vehicle is determined. Longitudinal and lateral-directional stability data were obtained at Mach numbers of 1.6, 2.0, and 2.2 with and without the engines operating. The plumes exiting from the engines were simulated by a cold-gas jet supplied by an auxiliary 200-atm air supply system and solid-body plume simulators. The aerodynamic effects produced by these two simulation procedures are compared. The parameters most significantly affected by the jet plumes are pitching moment, elevon control effectiveness, axial force, and orbiter wing loads. The solid rocket motor (SRM) plumes have the largest effect on the aerodynamic characteristics. The effect of the orbiter plumes in combination with the SRM plumes is also significant. Variations in the nozzle design parameters and configuration changes can reduce the jet plume-induced aerodynamic effects.
    Keywords: SPACE VEHICLES
    Type: NASA-TM-X-3032 , A-5212
    Format: application/pdf
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