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  • GEOPHYSICS  (449)
  • ENERGY PRODUCTION AND CONVERSION  (373)
  • Animals
  • SPACE SCIENCES
  • 1980-1984
  • 1975-1979  (822)
  • 1970-1974
  • 1976  (822)
Collection
Keywords
Years
  • 1980-1984
  • 1975-1979  (822)
  • 1970-1974
Year
  • 1
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    Sensitivity of solar-cell performance to atmospheric variables. 2: Dissimilar cells at several locations (1976)
    In:  CASI
    Details
    Publication Date: 2009-11-16
    Description: For abstract, see N77-26624.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Terrest. Photovoltaic Meas., 2; p 259-270
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Mathematical modelling of undrained clay behavior (1976)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: The proposed general analytical model describes the anisotropic, elastoplastic, path-dependent, stress-strain properties of inviscid saturated clays under undrained conditions. Model parameters are determined by using results from strain-controlled simple shear tests on a saturated clay. The model's accuracy is evaluated by applying it to predict the results of other tests on the same clay, including monotonic and cyclic loading. The model explains the very anisotropic shear strength behavior observed for weak marine clays.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Advan. in Eng. Sci., Vol. 1; p 95-102
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Problems in photoresponse distribution measurement (1976)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: Photoresponse distribution measurement by scanning a light spot across the surface of a semiconductor device is examined. The technqiue is used for solar cell characterization because the measured quantity is the direct expression of the distribution of the desired performance of the device. An apparatus for measuring the photoresponse distribution was set and used in the development of polysilicon thin film solar cells. A schmeatic diagram of the apparatus and an example of measurement are shown.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Lewis Res. Center Terrest. Photovoltaic Meas., 2; p 355-362
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    On the determination of series resistance and diode quality factor of solar cells (1976)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: The series resistance and diode quality factor are used for evaluation of solar cell performance. These parameters are normally deduced from the terminal I-V characteristics under forward bias. The method produces a smaller series resistance and a larger value for diode quality factor than appropriate for the device when operating as a solar cell. It is suggested that the diode quality factor be determined from measured saturated photocurrent, open circuit voltage characteristics and the series resistance be measured with an r-f bridge or calculated from a measurement of the surface sheet resistance.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Lewis Res. Center Terrest. Photovoltaic Meas., 2; p 347-354
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Silicon solar cell testing in concentrated sunlight and simulated sunlight (1976)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: A method is described for testing silicon solar cells in concentrated sunlight and simulated sunlight. Concentrated sunlight is obtained by using an acrylic Fresnel lens; the simulated sunlight source is a short arc Xenon lamp. Average illumination levels during the tests are inferred from an assumed linear relationship between short circuit current and illumination. The linearity assumption is investigated for 0.3 alpha cm base resistivity silicon cells and found to be valid. Some typical results are presented to illustrate the type of information obtained during the testing.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Lewis Res. Center Terrest. Photovoltaic Meas., 2; p 337-354
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Indoor and outdoor measurements of performance of photovoltaic arrays (1976)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: For abstract, see N77-26626.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Terrest. Photovoltaic Meas., 2; p 309-322
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Recommendations for the performance rating of flat plate terrestrial photovoltaic solar panels (1976)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: A review of recommendations for standardizing the performance rating of flat plate terrestrial solar panels is given to develop an international standard code of practice for performance rating. Required data to characterize the performance of a solar panel are listed. Other items discussed are: (1) basic measurement procedures; (2) performance measurement in natural sunlight and simulated sunlight; (3) standard solar cells; (4) the normal incidence method; (5) global method and (6) definition of peak power.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Lewis Res. Center Terrest. Photovoltaic Meas., 2; p 323-336
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Cell and module test procedures seen from the manufacturer and the user point of view (1976)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: The problems encountered by manufacturers and users of solar modules are summarized. Related measurement of the rated power of the module is included, and a temperature test is suggested to define the actual performance of a module. Other suggestions are given for environmental module and array tests.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Lewis Res. Center Terrest. Photovoltaic Meas., 2; p 301-308
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Introduction to basic solar cell measurements (1976)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: For abstract, see N77-26625.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Terrest. Photovoltaic Meas., 2; p 275-300
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Consideration of design and calibration of terrestrial reference solar cells (1976)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: For abstract, see N77-26621.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Terrest. Photovoltaic Meas., 2; p 203-222
    Format: text
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    NASA TECHNICAL REPORTS
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