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  • Weitere Quellen  (1.905)
  • 2015-2019
  • 1975-1979  (1.899)
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  • 1930-1934  (5)
  • 1925-1929  (1)
  • 1976  (1.899)
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  • 2015-2019
  • 1975-1979  (1.899)
  • 1950-1954
  • 1930-1934  (5)
  • 1925-1929  (1)
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  • 1
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    Hypersonic heat-transfer and transition correlations for a roughened shuttle orbiter (1976)
    In:  CASI
    Details
    Publikationsdatum: 2016-06-07
    Beschreibung: The effect of roughness on the heat transfer distributions and the transition criteria for the windward pitch plane of the shuttle orbiter at an angle of attack of 30 deg was studied using data obtained in hypersonic wind tunnels. The heat transfer distributions and the transition locations for the roughened models were compared with the corresponding data for smooth models. The data were correlated using theoretical solutions for a nonsimilar, laminar boundary layer subject to two different flow field models for the orbiter.
    Schlagwort(e): FLUID MECHANICS AND HEAT TRANSFER
    Materialart: an. In Eng. Sci., Vol. 4; p 1615-1627
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 2
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    Mineral and nitrogen balance study observations - The second manned Skylab mission (1976)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: A metabolic study of important body elements, particularly those of the musculoskeletal system, was carried out on the astronauts of the Skylab 3 mission during the preflight, inflight, and postflight phases. An elevation in the level of urinary calcium similar to that observed in the 28-d Skylab flight continued throughout the flight. Significant nitrogen and phosphorus losses, apparently associated with muscle tissue loss, occurred in spite of inflight exercise programs. On the basis of these results it is predicted that capable musculoskeletal function is likely to occur in flights longer than about 9 months in duration.
    Schlagwort(e): AEROSPACE MEDICINE
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
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    Flight evaluation of advanced flight control systems and cockpit displays for powered-lift STOL Aircraft (1976)
    In:  CASI
    Details
    Publikationsdatum: 2016-06-07
    Beschreibung: A flight research program was conducted to assess the improvements, in longitudinal path control during a STOL approach and landing, that can be achieved with manual and automatic control system concepts and cockpit displays with various degrees of complexity. NASA-Ames powered-lift Augmentor Wing Research Aircraft was used in the research program. Satisfactory flying qualities were demonstrated for selected stabilization and command augmentation systems and flight director combinations. The ability of the pilot to perform precise landings at low touchdown sink rates with a gentle flare maneuver was also achieved. The path-control improvement is considered to be applicable to other powered-lift aircraft configurations.
    Schlagwort(e): AIR TRANSPORTATION AND SAFETY
    Materialart: Aircraft Safety and Operating Problems; p 43-62
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 4
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    Laser velocimetry applied to transonic and supersonic aerodynamics (1976)
    In:  CASI
    Details
    Publikationsdatum: 2017-10-02
    Beschreibung: As a further demonstration of the capabilities of laser velocity in compressible aerodynamics, measurements obtained in a Mach 2.9 separated turbulent boundary layer and in the transonic flow past a two-dimensional airfoil section are presented and compared to data realized by conventional techniques. In the separated-flow study, the comparisons were made against pitot-static pressure data. Agreement in mean velocities was realized where the pressure measurements could be considered reliable; however, in regions of instantaneous reverse velocities, the laser results were found to be consistent with the physics of the flow whereas the pressure data were not. The laser data obtained in regions of extremely high turbulence suggest that velocity biasing does not occur if the particle occurrence rate is low relative to the turbulent fluctuation rate. Streamwise turbulence intensities are also presented. In the transonic airfoil study, velocity measurements obtained immediately outside the upper surface boundary layer of a 6-inch chord MACA 64A010 airfoil are compared to edge velocities inferred from surface pressure measurements. For free-stream Mach numbers of 0.6 and 0.8, the agreement in results was very good. Dual scatter optical arrangements in conjunction with a single particle, counter-type signal processor were employed in these investigations. Half-micron-diameter polystyrene spheres and naturally occurring condensed oil vapor acted as light scatterers in the two respective flows. Bragg-cell frequency shifting was utilized in the separated flow study.
    Schlagwort(e): AERODYNAMICS
    Materialart: AGARD Appl. of Non-Intrusive Instr. in Fluid Flow Res.; 12 p
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
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    Applied Remote Sensing Program (ARSP) (1976)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The activities and accomplishments of the Applied Remote Sensing Program during FY 1975-1976 are reported. The principal objective of the Applied Remote Sensing Program continues to be designed projects having specific decision-making impacts as a principal goal. These projects are carried out in cooperation and collaboration with local, state and federal agencies whose responsibilities lie with planning, zoning and environmental monitoring and/or assessment in the application of remote sensing techniques. The end result of the projects is the use by the involved agencies of remote sensing techniques in problem solving.
    Schlagwort(e): EARTH RESOURCES AND REMOTE SENSING
    Materialart: NASA-CR-148324 , OALS-BULL-13
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
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    Laser velocimetry applied to transonic and supersonic aerodynamics (1976)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Measurements obtained with laser velocimetry in a Mach 2.9 separated turbulent boundary layer and in the transonic flow past a two-dimensional airfoil section are presented and compared to data realized by conventional techniques. Agreement in mean velocities was realized where the pressure measurements could be considered reliable; however, in regions of instantaneous reverse velocities, the laser results were found to be consistent with the physics of the flow whereas the pressure data were not. Streamwise turbulence intensities are also presented. In the transonic airfoil study, velocity measurements obtained immediately outside the upper surface boundary layer of a 6-inch chord NACA 64A010 airfoil are compared to edge velocities inferred from surface pressure measurements. For free-stream Mach numbers of 0.6 and 0.8, the agreement in results was very good. "Dual scatter" optical arrangements in conjunction with a single particle, counter-type signal processor were employed in these investigations.
    Schlagwort(e): INSTRUMENTATION AND PHOTOGRAPHY
    Materialart: NASA-TM-X-73117 , A-6510
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 7
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    Search for organic and volatile inorganic compounds in two surface samples from the Chryse Planitia region of Mars (1976)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Two surface samples collected from the Chryse Planitia region of Mars were heated to temperatures up to 500 C, and the volatiles that they evolved were analyzed with a gas chromatograph-mass spectrometer. Only water and carbon dioxide were detected. This implies that organic compounds have not accumulated to the extent that individual components could be detected at levels of a few parts per billion by weight in the samples. Proposed mechanisms for the accumulation and destruction of organic compounds are discussed in the light of this limit.
    Schlagwort(e): LUNAR AND PLANETARY EXPLORATION
    Materialart: Science; 194; Oct. 1
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 8
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    Viking: Mars atmospheric water vapor mapping experiment - Preliminary report of results (1976)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Observations made from the Viking 1 orbiter show very little water vapor in the Mars atmosphere in the southern hemisphere (0 to 3 precipitable micrometers) with a gradual increase across the equator to northern latitudes. Maximum amounts between 20 and 30 micrometers have been observed in the short period covered by the observations to date. The season, northern midsummer, corresponds to the beginning of the water vapor cycle in that hemisphere. A strong repetitive diurnal cycling between the solid and vapor phase is observed at a site to the east of the Tharsis Ridge at 10 deg north latitude; the vapor lies close to the martian surface and is most probably in saturation equilibrium with a surface haze or fog throughout much of the day.
    Schlagwort(e): LUNAR AND PLANETARY EXPLORATION
    Materialart: Science; 193; Aug. 27
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
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    Atmospheric ozone measurements made from B-747 airliners - Spring 1975 (1976)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: Atmospheric ozone in the upper troposphere and lower stratosphere north of the equator has been registered aboard two commercial B-747 airliners during the Spring of 1975. This monitoring is part of a much broader and continuing project developed by NASA and known as the Global Atmospheric Sampling Program (GASP). Additional flight and meteorological conditions have also been automatically recorded on board concurrent with the ozone measurements. Independently-derived tropopause pressure information was available from NMC data archives and was used to identify stratospheric and tropospheric flight. The composite ozone, flight and meteorological data are reported for selected dates in March, April, and May. Attention is drawn particularly to the vertical profiles of atmospheric ozone mixing ratio as a function of both distance from the tropopause and curvature of the streamlines. The GASP observations suggest that ozone levels typical of the lower stratosphere are often embedded in the upper troposphere, principally during occasions when cyclonic wind curvature was noted.
    Schlagwort(e): GEOPHYSICS
    Materialart: Joint Symposium on Atmospheric Ozone; Aug 09, 1976 - Aug 17, 1976; Dresden; Germany
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 10
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    Methods and new approaches to the calculation of physiological parameters by videodensitometry (1976)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: A complex system featuring a video-camera connected to a video disk, cine (medical motion picture) camera and PDP-9 computer with various input/output facilities has been developed. This system enables the performance of quantitative analysis of various functions recorded in clinical studies. Several studies are described, such as heart chamber volume calculations, left ventricle ejection fraction, blood flow through the lungs and also the possibility of obtaining information about blood flow and constrictions in small cross-section vessels
    Schlagwort(e): MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Materialart: Seminar on Low light level devices for science and technology; Mar 22, 1976 - Mar 23, 1976; Reston, VA
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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