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  • Inorganic Chemistry  (748)
  • INSTRUMENTATION AND PHOTOGRAPHY  (384)
  • ASTROPHYSICS
  • 1975-1979
  • 1970-1974  (1,297)
  • 1920-1924
  • 1974  (1,297)
Collection
Keywords
Publisher
Years
  • 1975-1979
  • 1970-1974  (1,297)
  • 1920-1924
Year
  • 1
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    Automated analysis of video data (1974)
    In:  CASI
    Details
    Publication Date: 2006-05-07
    Description: A software/hardware system designed and developed to perform automated video imagery analysis is described. Major elements included in the analysis system are: (1) sampling oscilloscope; (2) programmable trigger unit; (3) central computer; and (4) software processing library. The function of the scope and trigger unit, in conjunction with the control computer, is to digitize the selected portion of the video image and store as amplitude and time data in computer memory. Evaluation of the video data, analogus to interpretation of a visual image, is accomplished by the processing software. It is indicated that this technique of video image analysis is applicable to a wide variety of nonaerospace applications involving video data and image analysis.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Chamber of Commerce Proc. of the 1st 1974 Technol. Transfer Conf.; p 181-188
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    NASA TECHNICAL REPORTS
  • 2
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    Apparatus for calibration of on-board instruments and laboratory modelling of rarefied plasma flows past models (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Problems of laboratory simulation of artificial earth satellite flight conditions in the ionosphere are examined, and a setup capable of reproducing the basic parameters of ion flows (with energies of 5-10 eV, energy spectrum width approximately 2x5 eV, and an intensity of 10 to the minus 8th power a/cm/2) past measurement instruments and satellite models is described. Possibilities for further improvement of the apparatus are discussed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Interplanet. Medium and Phys. of the Magnetosphere (NASA-TT-F-784); p 282-291
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Short-range repulsive forces between atoms and molecules of atmospheric gases (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Experimental determination of the paired interaction potential of atoms and molecules composing the atmospheres of the earth and the planets is described.
    Keywords: ASTROPHYSICS
    Type: Interplanet. Medium and Phys. of the Magnetosphere (NASA-TT-F-784); p 275-281
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    NASA TECHNICAL REPORTS
  • 4
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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
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    NASA TECHNICAL REPORTS
  • 5
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    Structural formations in the interplanetary medium (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Research on the fine structure of the interplanetary medium is reviewed. The characteristics of shock waves, filaments, and contact surfaces according to space probe measurements are discussed.
    Keywords: ASTROPHYSICS
    Type: Interplanet. Medium and Phys. of the Magnetosphere (NASA-TT-F-784); p 103-123
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  • 6
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    High-frequency turbulence in the cosmic plasma (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The problem of quasistationary high frequency Langmuir turbulence, which is one of the types of turbulence encountered in the cosmic plasma, is examined theoretically.
    Keywords: ASTROPHYSICS
    Type: Interplanet. Medium and Phys. of the Magnetosphere (NASA-TT-F-784); p 83-102
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    NASA TECHNICAL REPORTS
  • 7
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    Dissipation of energy in model experiments (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Interaction studies of a plasma stream with a magnetic dipole have shown that the thickness of the plasma/field interlayer is considerably greater than the characteristic plasma dimension c/omega sub 0. Broadening of the layer is due to the formation of a collisionless shock wave. To demonstrate collisionless dissipation, the Joulean losses were calculated using the conductivity value obtained from the skin layer thickness. Analysis of the various physical processes showed that the hypothesis of collisionless dissipation of the directional plasma flow is justified.
    Keywords: ASTROPHYSICS
    Type: Interplanet. Medium and Phys. of the Magnetosphere (NASA-TT-F-784); p 59-67
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    NASA TECHNICAL REPORTS
  • 8
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    Certain problems in the physics of the magnetosphere (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: A review of experimental and theoretical studies devoted to analysis of physical processes in the magnetosphere is presented. Attention is focused on the interrelationships among the most important geophysical phenomena in the magnetosphere: magnetic storms, auroras, the radiation belts, and processes in the geomagnetic tail. Recommendations are submitted for future experiments that are needed for development of a theory of magnetospheric phenomena.
    Keywords: ASTROPHYSICS
    Type: Interplanet. Medium and Phys. of the Magnetosphere (NASA-TT-F-784); p 1-33
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    NASA TECHNICAL REPORTS
  • 9
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    Use of conventional equipment to measure the effective perceived noise level of aircraft (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: A real time, computerized, measurement method for the effective perceived noise level is reported that uses comparison of two sounds differing in level and frequency to obtain the noise intensity emitted by aircraft and to calculate human psychoacoustic annoyance reactions.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: the 4th Natl. Conf. on Acoustics, Vol. 1A (NASA-TT-F-15375); p 224-232
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    An objective method and measuring equipment for noise control and acoustic diagnostics of motorcars (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: An objective method and apparatus for noise control and acoustic diagnostics of motorcar engines are reported. The method and apparatus let us know whether the noisiness of the vehicle under test exceeds the admissible threshold levels given by appropriate standards and if so what is the main source of the excessive noise. The method consists in measuring both the overall noise level and the sound pressure levels in definite frequency bands while the engine speed is controlled as well and may be fixed at prescribed values. Whenever the individually adjusted threshold level has been exceeded in any frequency band, a self-sustaining control signal is sent.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: The 4th Natl. Conf. on Acoustics Vol. 1A (NASA-TT-F-15375); p 198-204
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