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  • Inorganic Chemistry  (3,763)
  • EARTH RESOURCES AND REMOTE SENSING  (3,646)
  • Organic Chemistry  (3,423)
  • AERODYNAMICS  (2,110)
  • AIRCRAFT PROPULSION AND POWER  (1,211)
  • 1975-1979  (14,153)
Collection
Keywords
Publisher
Years
Year
  • 1
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    On wings of circular design (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Prandtl's method of sources and sinks for air foils is used to investigate the aerodynamics of circular wings in constant flow. Lift distribution, total lift, and pitching moment are investigated as well as the influence of changes in the angle of attack.
    Keywords: AERODYNAMICS
    Type: NASA-TM-75505
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Solution of a few nonlinear problems in aerodynamics by the finite elements and functional least squares methods (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The numerical simulation of the transonic flows of idealized fluids and of incompressible viscous fluids, by the nonlinear least squares methods is presented. The nonlinear equations, the boundary conditions, and the various constraints controlling the two types of flow are described. The standard iterative methods for solving a quasi elliptical nonlinear equation with partial derivatives are reviewed with emphasis placed on two examples: the fixed point method applied to the Gelder functional in the case of compressible subsonic flows and the Newton method used in the technique of decomposition of the lifting potential. The new abstract least squares method is discussed. It consists of substituting the nonlinear equation by a problem of minimization in a H to the minus 1 type Sobolev functional space.
    Keywords: AERODYNAMICS
    Type: NASA-TM-75732
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 3
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    Resource observations from space - Present and future (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The paper deals with some advances which have been made in the field of space remote sensing of the earth's natural resources and in the application of space techniques to the improvement of resource management and better understanding of the physical and dynamic nature of the earth. The current status and planned developments in the management of renewable and nonrenewable resources are reviewed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: EASCON ''78; Electronics and Aerospace Systems Convention; Sep 25, 1978 - Sep 27, 1978; Arlington, VA
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Investigation of air stream from combustor-liner air entry holes, 3 (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Jets flowing from air entry holes of the combustor liner of a gas turbine were investigated. Cold air was supplied through the air entry holes into the primary hot gas flows. The mass flow of the primary hot gas and issuing jets was measured, and the behavior of the air jets was studied by the measurement of the temperature distribution of the gas mixture. The air jets flowing from three circular air entry holes, single streamwise long holes, and two opposing circular holes, parallel to the primary flow were studied along with the effects of jet and gas stream velocities, and of gas temperature. The discharge coefficient, the maximum penetration of the jets, the jet flow path, the mixing of the jets, and temperature distribution across the jets were investigated. Empirical expressions which describe the characteristics of the jets under the conditions of the experiments were formulated.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-75430 , NAL-TR-369
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    LACIE (Large Area Crop Inventory Experiment) Programme (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Large Area Crop Inventory Experiment was a three year experiment conducted jointly by the United States Department of Agriculture, NASA, and NOAA (National Oceanic and Atmospheric Administration) to determine if global wheat production can be forecast from LANDSAT data to within 90% of actual yield for each observed 9 years out of 10. Data for the third crop year (1976-1977) was compiled. The proportional area of cultivated land devoted to wheat was estimated based on a statistical sampling of LANDSAT data. Yield is presently estimated by NOAA using regression models developed from historical weather and yield information. Results are discussed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: ESA Earth Observation from Space and Management of Planetary Resources; p 13-16
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Earth resources: A continuing bibliography with indexes, issue 21 (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A bibliography list of 369 reports, articles, and other documents introduced into the NASA scientific and technical information system between January 1, 1979 and March 31, 1979 is presented. Emphasis is placed on the use of remote sensing and geophysical instrumentation in spacecraft and aircraft to survey and inventory natural resources and urban areas. Subject matter is grouped according to agriculture and forestry, environmental changes and cultural resources, geodesy and cartography, geology and mineral resources, hydrology and water management, data processing and distribution systems, instrumentation and sensors, and economic analysis.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-SP-7041(21)
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 7
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    Remote sensing (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Various imaging techniques are outlined for use in mapping, land use, and land management in Mexico. Among the techniques discussed are pattern recognition and photographic processing. The utilization of information from remote sensing devices on satellites are studied. Multispectral band scanners are examined and software, hardware, and other program requirements are surveyed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-75651
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 8
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    The LANDSAT program: The present and prospects (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The LANDSAT program is described and the benefits derived from it are pointed out. The successive LANDSAT launchings and its respective equipment are discussed. The earth's surface covering, the techniques of relaying the information to the ground, a description of the LANDSAT D system, a comparison between the multispectral scanner on LANDSAT C and the MSS on LANDSAT D, and information about the regions of the electromagnetic spectrum covered by LANDSAT C and LANDSAT D are discussed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: ESA Earth Observation from Space and Management of Planetary Resources; p 187-195
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Earth Resources: A continuing bibliography with indexes, issue 20 (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: This bibliography lists 273 reports, articles, and other documents introduced into the NASA scientific and technical information system between October 1 and December 31, 1978. Emphasis is placed on the use of remote sensing and geophysical instrumentation in spacecraft and aircraft to survey and inventory natural resources and urban areas. Subject matter is grouped according to agriculture and forestry, environmental changes and cultural resources, geodesy and cartography, geology and mineral resources, hydrology and water management, data processing and distribution systems, instrumentation and sensors, and economic analysis.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-SP-7041(20)
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Description of the apparatus and methods of ground and aircraft measurements for the program of experimental research on the development of methods for remote sensing of soils and plants on analog-sites in the USA and USSR in 1975 - 1980 (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TT-F-17026
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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