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  • AIRCRAFT  (64)
  • ASTROPHYSICS  (41)
  • SPACE VEHICLES  (41)
  • BIOSCIENCES  (36)
  • 1970-1974  (180)
  • 1950-1954  (2)
  • 1974  (180)
  • 1954  (2)
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Keywords
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  • 1970-1974  (180)
  • 1950-1954  (2)
Year
  • 1
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    An investigation of the cosmic radiation in the vicinity of the moon on the Luna 10, 11, and 12 artificial lunar satellites (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Research on the primary cosmic radiation and solar cosmic rays from the Luna 10, 11, and 12 artificial lunar satellites is reviewed. Data on the vertical distribution of cosmic rays above the moon's surface are presented, and the albedo for the primary radiation is determined. The fluxes of electrons with energies from 30 to 300 keV were registered in the solar cosmic rays. Rapid variations of the electron flux were observed. The angular distributions of 0.5-10 MeV protons moving together with the corpuscular streams responsible for Forbush decreases were investigated.
    Keywords: ASTROPHYSICS
    Type: Interplanet. Medium and Phys. of the Magnetosphere (NASA-TT-F-784); p 151-173
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Suspension-line wave motion during the lines-first parachute unfurling process (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A new mathematical approach to modeling the lines-first parachute unfurling process is presented. The unfurling process is treated as two distinct phases: a suspension-line unfurling phase, during which a massless-spring model of the suspension-line elasticity may be employed; and a canopy unfurling phase, during which a formulation considering suspension-line wave mechanics is employed. Histories of unfurled length and tension at the vehicle obtained using the model are compared with flight test data, and generally good agreement is observed.
    Keywords: AIRCRAFT
    Type: AIAA Journal; 12; Jan. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Estimates of the Venus atmosphere optical characteristics with application to the problem of photographing its clouds and surface (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Optical parameters investigated and solved for included: (1) cloud layer albedo and cloud cover optical thickness; (2) planetary surface self-radiation influence; (3) light flux distribution as function of atmospheric height; (4) upper estimate of the observed contrasts; (5) surface optical parameters; and (6) contrast decrease with altitude.
    Keywords: ASTROPHYSICS
    Type: Space Iconics (NASA-TT-F-798); p 121-135
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Applicability of the diffusion approximation (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Several methods using an approximate form of the scattering indicatrix are discussed for simplifying the calculation of radiation transport in planetary atmospheres.
    Keywords: ASTROPHYSICS
    Type: Space Iconics (NASA-TT-F-798); p 75-84
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    NASA TECHNICAL REPORTS
  • 5
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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
  • 6
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    An analysis of pilot error-related aircraft accidents (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A multidisciplinary team approach to pilot error-related U.S. air carrier jet aircraft accident investigation records successfully reclaimed hidden human error information not shown in statistical studies. New analytic techniques were developed and applied to the data to discover and identify multiple elements of commonality and shared characteristics within this group of accidents. Three techniques of analysis were used: Critical element analysis, which demonstrated the importance of a subjective qualitative approach to raw accident data and surfaced information heretofore unavailable. Cluster analysis, which was an exploratory research tool that will lead to increased understanding and improved organization of facts, the discovery of new meaning in large data sets, and the generation of explanatory hypotheses. Pattern recognition, by which accidents can be categorized by pattern conformity after critical element identification by cluster analysis.
    Keywords: AIRCRAFT
    Type: NASA-CR-2444 , H-827
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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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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    NASA TECHNICAL REPORTS
  • 8
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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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    NASA TECHNICAL REPORTS
  • 9
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    Some characteristics of fructose 1,6-diphosphatase activity in rat liver (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A reliable assay for hepatic fructose 1,6-diphosphatase in the rat was developed. It was found that the greatest enzymic activity and highest protein levels were eluted from the colored portion of the homogenate. When the substrate concentration was 0.01M, the enzyme had optimal activity when incubated with 0.01M MgSO4 for 10 min. at 37 C in 0.05M Tris-HC1 buffer, pH 7.5. Specificity for the substrate, fructose 1,6-diphosphate, was obtained at substrate concentration of 0.01M.
    Keywords: BIOSCIENCES
    Type: NASA-CR-137415
    Format: application/pdf
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  • 10
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    Conservation of Shannon's redundancy for proteins (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Concepts of information theory are applied to examine various proteins in terms of their redundancy in natural originators such as animals and plants. The Monte Carlo method is used to derive information parameters for random protein sequences. Real protein sequence parameters are compared with the standard parameters of protein sequences having a specific length. The tendency of a chain to contain some amino acids more frequently than others and the tendency of a chain to contain certain amino acid pairs more frequently than other pairs are used as randomness measures of individual protein sequences. Non-periodic proteins are generally found to have random Shannon redundancies except in cases of constraints due to short chain length and genetic codes. Redundant characteristics of highly periodic proteins are discussed. A degree of periodicity parameter is derived.
    Keywords: BIOSCIENCES
    Type: Journal of Molecular Evolution; 3; 3, 19; 1974
    Format: text
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