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  • ENERGY PRODUCTION AND CONVERSION  (9)
  • EARTH RESOURCES AND REMOTE SENSING  (4)
  • 1980-1984  (13)
  • 1980  (13)
  • 1
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    A unifying study of tandem-junction, front-surface-field, and interdigitated-back-contact solar cells (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Solid-State Electronics; 23; Nov. 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Late biological effects of heavy charged particles: Cataracts, vascular injury and life shortening in mice (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Risks associated with extended habitation in a space environment, particularly hazards to space workers that might result from exposure to high energy heavy ion particles (HZE), were studied. Biological effects of HZE were investigated in mice to assess their potential adverse health hazards. The potential effects of HZE particles on the crystalline lens of the eye and the carcinogenic effects and blood vessel (vascular) damage from radiation were evaluated by a risk assessment. Animal experiments to evaluate dose response relationships for tumor induction/promotion and for vascular injury were introduced. Cataract productions and preliminary results on cacinogenic and vascular effects are presented for perspective.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA, Washington The Final Proc. of the Solar Power Satellite Program Rev.; p 477-479
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Experimental evaluation of thermal energy storage (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The technical performance of commercially available thermal energy storage (TES) residential heating units under severe weather conditions is discussed. The benefits and costs of TES to the user and utility companies were assessed. The TES issues, research and development needs, and barriers to commercialization were identified. The field tests which determined the performance characteristics for the TES are described and the TES systems, which included both ceramic and hydronic systems, are compared.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Lewis Res. Center Thermal Energy Storage; p 307-314
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Airborne laser topographic mapping results from initial joint NASA/US Army Corps of Engineers experiment (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Initial results from a series of joint NASA/US Army Corps of Engineers experiments are presented. The NASA Airborne Oceanographic Lidar (AOL) was exercised over various terrain conditions, collecting both profile and scan data from which river basin cross sections are extracted. Comparisons of the laser data with both photogrammetry and ground surveys are made, with 12 to 27 cm agreement observed over open ground. Foliage penetration tests, utilizing the unique time-waveform sampling capability of the AOL, indicate 50 cm agreement with photogrammetry (known to have difficulty in foliage covered terrain).
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-73287
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Parametric study of prospective early commercial MHD power plants (PSPEC). General Electric Company, task 1: Parametric analysis (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The performance and cost of moderate technology coal-fired open cycle MHD/steam power plant designs which can be expected to require a shorter development time and have a lower development cost than previously considered mature OCMHD/steam plants were determined. Three base cases were considered: an indirectly-fired high temperature air heater (HTAH) subsystem delivering air at 2700 F, fired by a state of the art atmospheric pressure gasifier, and the HTAH subsystem was deleted and oxygen enrichment was used to obtain requisite MHD combustion temperature. Coal pile to bus bar efficiencies in ease case 1 ranged from 41.4% to 42.9%, and cost of electricity (COE) was highest of the three base cases. For base case 2 the efficiency range was 42.0% to 45.6%, and COE was lowest. For base case 3 the efficiency range was 42.9% to 44.4%, and COE was intermediate. The best parametric cases in bases cases 2 and 3 are recommended for conceptual design. Eventual choice between these approaches is dependent on further evaluation of the tradeoffs among HTAH development risk, O2 plant integration, and further refinements of comparative costs.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-159634 , DOE/NASA/0052-79/1
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    NASA TECHNICAL REPORTS
  • 6
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    Evaluation of results of US corn and soybeans exploratory experiment: Classification procedures verification test (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The classification procedure utilized in making crop proportion estimates for corn and soybeans using remotely sensed data was evaluated. The procedure was derived during the transition year of the Large Area Crop Inventory Experiment. Analysis of variance techniques were applied to classifications performed by 3 groups of analysts who processed 25 segments selected from 4 agrophysical units (APU's). Group and APU effects were assessed to determine factors which affected the quality of the classifications. The classification results were studied to determine the effectiveness of the procedure in producing corn and soybeans proportion estimates.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E81-10076 , NASA-CR-160873 , FC-LO-00423 , LEMSCO-14386 , JSC-16339
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    NASA TECHNICAL REPORTS
  • 7
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    Review of physics underlying recent improvements in silicon solar-cell performance (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper provides a unifying view of the physics of silicon solar cells, and uses it as a basis for explaining how recent improvements in the performance of these cells have been achieved. The unification is facilitated by a region-by-region analysis of the solar cell, which is also used to compare several recently proposed cell structures.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Photovoltaic Specialists Conference; Jan 07, 1980 - Jan 10, 1980; San Diego, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Overview of a stirling engine test project (1980)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Tests were conducted on three Stirling engines ranging in size from 1.33 to 53 horsepower (1 to 40 kW). The tests were directed toward developing alternative, backup component concepts to improve engine efficiency and performance or to reduce costs. Some of the activities included investigating attractive concepts and materials for cooler-regenerator units, installing a jet impingement device on a Stirling engine to determine its potential for improved engine performance, and presenting performance maps for initial characterization of Stirling engines. The experiment results of the tests are presented along with predictions of results of future tests to be conducted on the Stirling engines.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-81442 , DOE/NASA/1040-80/12 , E-362 , Intern. Automotive Propulsion Systems Symp.; Apr 14, 1980 - Apr 18, 1980; Dearborn, MI; United States
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    NASA TECHNICAL REPORTS
  • 9
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    Airborne laser acquisition of cross-section data (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The feasibility of obtaining cross-section data from airborne remote sensing systems is investigated. Eleven test profiles in the Wolf River Basin, near Memphis, Tennessee, are selected. Each profile is characterized using conventional ground survey methods; under 'leaves-off' conditions, photogrammetric, airborne laser, and airborne radar data are obtained. Results indicate that valley profiles can be accurately characterized with an airborne laser system.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: In: Civil engineering applications of remote sensing; August 13, 14, 1980; Madison, WI
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    NASA TECHNICAL REPORTS
  • 10
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    Parametric study of prospective early commercial OCMHD power plants /PSPEC/ (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The paper presents a parametric study conducted to obtain the performance, economics, natural resource requirements, and environmental impact of moderate technology MHD/steam power plants that do not require development of direct-fired high-temperature air heaters. The study was divided into three base cases, each with a reference case and parametric variations. The case using recuperative air preheat in the range of 1000 F to 1300 F, combined with O2 enrichment to 42% by volume has been selected for conceptual design.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: International Conference on Magneto-Hydrodynamic Electrical Power Generation; Jun 16, 1980 - Jun 20, 1980; Cambridge, MA
    Format: text
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    NASA TECHNICAL REPORTS
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