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  • 1
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    A satellite investigation of energy flux and inferred potential drop in auroral electron energy spectra (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Because predicted relationship (epsilon directly varies with V squared) between auroral electron energy flux (epsilon) and the inferred acceleration potential drop (V) for accelerated Maxwellian distributions was favorably tested by other using sounding rocket data for the limiting case of eVE 1 (where Ec is the characteristic energy of the accelerated Maxwellian distribution) and for a single inverted-V observed by the Injun 5 satellite, data from Atmosphere D were used to extend these studies over the range .2 eV/Ec 5 and for a wide range of latitudes and local times on both the nightside and the dayside. Results show good agreement with the full accelerated Maxwellian model. An analytical approximation to the electron energy flux was derived which better describes the data over the range .2 eV/Ec approximated 3. Analyses of individual energy spectra at small and large pitch angles through well-defined inverted-V structures suggest that the altitude of the inferred potential drop maximizes near the center of the inverted-V's.
    Keywords: SOLAR PHYSICS
    Type: Texas Univ. at San Antonio Res. on Solar-Wind Magnetospheric Elec. Fields and Plasmas; 16 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Theory and experiments of squeeze-film gas bearings. I - Cylindrical journal bearing. (1966)
    In:  Other Sources
    Details
    Publication Date: 2019-05-30
    Description: Cylindrical squeeze-film gas journal bearing, noting load deflection experiments
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: ASME PAPER 65-LUB-13
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Theory and experiments of squeeze-film gas bearings. I - Cylindrical journal bearing. (1965)
    In:  Other Sources
    Details
    Publication Date: 2019-05-30
    Description: Cylindrical squeeze-film gas journal bearing, noting load deflection experiments
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: ASME PAPER 65-LUB-13
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Research on solar-wind and magnetospheric electric fields and plasmas (1978)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Attempts were made to determine the role of the interplanetary magnetic field in controlling: (1) particle acceleration processes in the earth's polar cap; (2) plasma convection patterns at high latitudes; and, (3) the topology of magnetic field lines in the earth's polar cusps. The primary result of the study on polar-cap particle acceleration regions was that they tend to occur in only one polar cap at a time, and that they occur in the hemisphere for which the magnetospheric tail-lobe field lines have solar-magnetospheric x components that are antiparallel to those of the interplanetary and tail-lobe magnetic field. Southward-directed interplanetary magnetic fields give rise to broad convection throats which cover several hours of local time across the dayside cleft. Under such conditions, solar-wind plasma is channeled efficiently through the polar cusps to populate the plasma mantle and dayside boundary layer. On the other hand, the appearance of strong northward components in the interplanetary magnetic field result in a very constricted throat, resulting in inefficient plasma entry at the cusps by diffusion processes.
    Keywords: SOLAR PHYSICS
    Type: NASA-CR-158069
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Experiments in hydrodynamic grease bearings (1969)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Hydrodynamic grease bearings replacing gyro ball bearings on extended space missions
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-TM-X-53871
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Research on solar-wind and magnetospheric electric fields and plasmas (1981)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The phenomena of particle preciptation and ion convection at high latitudes and their response to variations in the interplanetary magnetic field. Data from the low energy electron experiment and the retarding potential analyzer drift meter on Atmosphere Explorers C and D were analyzed. Additional data from the spacecraft Imp-J were utilized.
    Keywords: SOLAR PHYSICS
    Type: NASA-CR-164372
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Experiments in hydrodynamic grease bearings. (1969)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Hydrodynamic conical and spherical spiral grooved grease bearings replacement of gyro ball bearings for extended space missions
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: AIAA PAPER 69-836 , AMERICAN INST. OF AERONAUTICS AND ASTRONAUTICS, GUIDANCE, CONTROL, AND FLIGHT MECHANICS CONFERENCE; Aug 18, 1969 - Aug 20, 1969; PRINCETON, NJ
    Format: text
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    NASA TECHNICAL REPORTS
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